☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2021-11-11 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Mouseover Popup Image Viewer
  3. // @namespace   https://github.com/tophf
  4. // @description Shows images and videos behind links and thumbnails.
  5. //
  6. // @include     *
  7. //
  8. // @grant       GM_download
  9. // @grant       GM_getValue
  10. // @grant       GM_openInTab
  11. // @grant       GM_registerMenuCommand
  12. // @grant       GM_unregisterMenuCommand
  13. // @grant       GM_setClipboard
  14. // @grant       GM_setValue
  15. // @grant       GM_xmlhttpRequest
  16. //
  17. // @grant       GM.getValue
  18. // @grant       GM.openInTab
  19. // @grant       GM.registerMenuCommand
  20. // @grant       GM.unregisterMenuCommand
  21. // @grant       GM.setClipboard
  22. // @grant       GM.setValue
  23. // @grant       GM.xmlHttpRequest
  24. //
  25. // @version     1.2.13
  26. // @author      tophf
  27. //
  28. // @original-version 2017.9.29
  29. // @original-author  kuehlschrank
  30. //
  31. // @connect     *
  32. // CSP check:
  33. // @connect     self
  34. // rule installer in config dialog:
  35. // @connect     github.com
  36. // big/trusted hostings for the built-in rules with "q":
  37. // @connect     deviantart.com
  38. // @connect     facebook.com
  39. // @connect     fbcdn.com
  40. // @connect     flickr.com
  41. // @connect     gfycat.com
  42. // @connect     googleusercontent.com
  43. // @connect     gyazo.com
  44. // @connect     imgur.com
  45. // @connect     instagr.am
  46. // @connect     instagram.com
  47. // @connect     prnt.sc
  48. // @connect     prntscr.com
  49. // @connect     user-images.githubusercontent.com
  50. //
  51. // @supportURL  https://github.com/tophf/mpiv/issues
  52. // @icon        https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
  53. // ==/UserScript==
  54.  
  55. 'use strict';
  56.  
  57. //#region Globals
  58.  
  59. /** @type mpiv.Config */
  60. let cfg;
  61. /** @type mpiv.AppInfo */
  62. let ai = {rule: {}};
  63. /** @type Element */
  64. let elConfig;
  65.  
  66. const doc = document;
  67. const hostname = location.hostname;
  68. const dotDomain = '.' + hostname;
  69. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  70. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  71. const isFF = CSS.supports('-moz-appearance', 'none');
  72. const AudioContext = window.AudioContext || function () {};
  73.  
  74. const PREFIX = 'mpiv-';
  75. const STATUS_ATTR = `${PREFIX}status`;
  76. const MSG = Object.assign({}, ...[
  77.   'getViewSize',
  78.   'viewSize',
  79. ].map(k => ({[k]: `${PREFIX}${k}`})));
  80. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  81. // time for volatile things to settle down meanwhile we postpone action
  82. // examples: loading image from cache, quickly moving mouse over one element to another
  83. const SETTLE_TIME = 50;
  84. // used to detect JS code in host rules
  85. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  86. const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
  87. const ZOOM_MAX = 16;
  88. const SYM_U = Symbol('u');
  89. const TRUSTED = (({trustedTypes}, policy) =>
  90.   trustedTypes ? trustedTypes.createPolicy('mpiv', policy) : policy
  91. )(window, {
  92.   createHTML: str => str,
  93. });
  94. //#endregion
  95. //#region GM4 polyfill
  96.  
  97. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  98.   this.GM = {info: GM_info};
  99. if (!GM.getValue)
  100.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  101. if (!GM.setValue)
  102.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  103. if (!GM.openInTab)
  104.   GM.openInTab = GM_openInTab;
  105. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  106.   GM.registerMenuCommand = GM_registerMenuCommand;
  107. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  108.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  109. if (!GM.setClipboard)
  110.   GM.setClipboard = GM_setClipboard;
  111. if (!GM.xmlHttpRequest)
  112.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  113.  
  114. //#endregion
  115.  
  116. const App = {
  117.  
  118.   isEnabled: true,
  119.   isImageTab: false,
  120.   globalStyle: '',
  121.   popupStyleBase: '',
  122.  
  123.   activate(info, event) {
  124.     const {match, node, rule, url} = info;
  125.     if (elConfig) console.info({node, rule, url, match});
  126.     if (ai.node) App.deactivate();
  127.     ai = info;
  128.     ai.force = event.ctrlKey;
  129.     ai.gNum = 0;
  130.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  131.     Util.suppressTooltip();
  132.     Calc.updateViewSize();
  133.     Events.toggle(true);
  134.     Events.trackMouse(event);
  135.     if (CspSniffer.init && location.protocol === 'https:')
  136.       CspSniffer.init();
  137.     if (ai.force) {
  138.       App.start();
  139.     } else if (cfg.start === 'auto' && !rule.manual) {
  140.       App.belate();
  141.     } else {
  142.       Status.set('ready');
  143.     }
  144.   },
  145.  
  146.   belate() {
  147.     if (cfg.preload) {
  148.       ai.preloadStart = now();
  149.       App.start();
  150.       Status.set('+preloading');
  151.       setTimeout(Status.set, cfg.delay, '-preloading');
  152.     } else {
  153.       ai.timer = setTimeout(App.start, cfg.delay);
  154.     }
  155.   },
  156.  
  157.   checkImageTab() {
  158.     const el = doc.body.firstElementChild;
  159.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  160.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  161.   },
  162.  
  163.   checkProgress({start} = {}) {
  164.     const p = ai.popup;
  165.     if (!p)
  166.       return;
  167.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  168.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  169.     if (h)
  170.       return App.canCommit(w, h);
  171.     if (start) {
  172.       clearInterval(ai.timerProgress);
  173.       ai.timerProgress = setInterval(App.checkProgress, 150);
  174.     }
  175.   },
  176.  
  177.   canCommit(w, h) {
  178.     if (!ai.force && ai.rect && !ai.gItems &&
  179.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  180.       App.deactivate();
  181.       return false;
  182.     }
  183.     App.stopTimers();
  184.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  185.     if (wait > 0) {
  186.       ai.timer = setTimeout(App.checkProgress, wait);
  187.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  188.       App.handleError({type: 'error'});
  189.     } else {
  190.       App.commit();
  191.     }
  192.     return true;
  193.   },
  194.  
  195.   async commit() {
  196.     const p = ai.popup;
  197.     const isDecoded = cfg.waitLoad && typeof p.decode === 'function';
  198.     if (isDecoded) {
  199.       await p.decode();
  200.       if (p !== ai.popup)
  201.         return;
  202.     }
  203.     App.updateStyles();
  204.     Calc.measurePopup();
  205.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  206.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  207.     if (willMove)
  208.       Popup.move();
  209.     Bar.updateName();
  210.     Bar.updateDetails();
  211.     Status.set(!ai.popupLoaded && 'loading');
  212.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  213.                ai.nheight > p.clientHeight + ai.extras.h;
  214.     if (ai.large) {
  215.       Status.set('+large');
  216.       // prevent a blank bg+border in FF
  217.       if (isFF && p.complete && !isDecoded)
  218.         p.style.backgroundImage = `url('${p.src}')`;
  219.     }
  220.   },
  221.  
  222.   deactivate({wait} = {}) {
  223.     App.stopTimers();
  224.     if (ai.req)
  225.       tryCatch.call(ai.req, ai.req.abort);
  226.     if (ai.tooltip)
  227.       ai.tooltip.node.title = ai.tooltip.text;
  228.     Status.set(false);
  229.     Bar.set(false);
  230.     Events.toggle(false);
  231.     Popup.destroy();
  232.     if (wait) {
  233.       App.isEnabled = false;
  234.       setTimeout(App.enable, 200);
  235.     }
  236.     ai = {rule: {}};
  237.   },
  238.  
  239.   enable() {
  240.     App.isEnabled = true;
  241.   },
  242.  
  243.   handleError(e, rule = ai.rule) {
  244.     if (rule && rule.onerror === 'skip')
  245.       return;
  246.     const fe = Util.formatError(e, rule);
  247.     if (!rule || !ai.urls || !ai.urls.length)
  248.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  249.     if (ai.urls && ai.urls.length) {
  250.       ai.url = ai.urls.shift();
  251.       if (ai.url) {
  252.         App.stopTimers();
  253.         App.startSingle();
  254.       } else {
  255.         App.deactivate();
  256.       }
  257.     } else if (ai.node) {
  258.       Status.set('error');
  259.       Bar.set(fe.message, 'error');
  260.     }
  261.   },
  262.  
  263.   /** @param {MessageEvent} e */
  264.   onMessage(e) {
  265.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  266.       e.stopImmediatePropagation();
  267.       for (const el of doc.getElementsByTagName('iframe')) {
  268.         if (el.contentWindow === e.source) {
  269.           const s = Calc.frameSize(el, window).join(':');
  270.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  271.           return;
  272.         }
  273.       }
  274.     }
  275.   },
  276.  
  277.   /** @param {MessageEvent} e */
  278.   onMessageChild(e) {
  279.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  280.       e.stopImmediatePropagation();
  281.       removeEventListener('message', App.onMessageChild, true);
  282.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  283.       if (w && h) ai.view = {w, h, x, y};
  284.     }
  285.   },
  286.  
  287.   start() {
  288.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  289.     if (!Util.isHovered(ai.node)) {
  290.       App.deactivate();
  291.       return;
  292.     }
  293.     App.updateStyles();
  294.     if (ai.gallery)
  295.       App.startGallery();
  296.     else
  297.       App.startSingle();
  298.   },
  299.  
  300.   startSingle() {
  301.     Status.loading();
  302.     ai.imageUrl = null;
  303.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  304.       Remoting.findRedirect();
  305.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  306.       App.startFromQ();
  307.     } else {
  308.       Popup.create(ai.url);
  309.       Ruler.runC();
  310.     }
  311.   },
  312.  
  313.   async startFromQ() {
  314.     try {
  315.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  316.       const url = Ruler.runQ(responseText, doc, finalUrl);
  317.       if (!url)
  318.         throw 'The "q" rule did not produce any URL.';
  319.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  320.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  321.         if (!info || !info.url)
  322.           throw `Couldn't follow URL: ${url}`;
  323.         Object.assign(ai, info);
  324.         App.startSingle();
  325.       } else {
  326.         Popup.create(url, finalUrl);
  327.         Ruler.runC(responseText, doc);
  328.       }
  329.     } catch (e) {
  330.       App.handleError(e);
  331.     }
  332.   },
  333.  
  334.   async startGallery() {
  335.     Status.loading();
  336.     try {
  337.       const startUrl = ai.url;
  338.       const p = await Remoting.getDoc(ai.rule.s !== 'gallery' && startUrl);
  339.       const items = await new Promise(resolve => {
  340.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  341.           resolve);
  342.         if (Array.isArray(it))
  343.           resolve(it);
  344.       });
  345.       // bail out if the gallery's async callback took too long
  346.       if (ai.url !== startUrl) return;
  347.       ai.gNum = items.length;
  348.       ai.gItems = items.length && items;
  349.       if (ai.gItems) {
  350.         const i = items.index;
  351.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  352.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  353.             Gallery.findIndex(ai.url);
  354.         setTimeout(Gallery.next);
  355.       } else {
  356.         throw 'Empty gallery';
  357.       }
  358.     } catch (e) {
  359.       App.handleError(e);
  360.     }
  361.   },
  362.  
  363.   stopTimers() {
  364.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  365.       clearTimeout(ai[timer]);
  366.     clearInterval(ai.timerProgress);
  367.   },
  368.  
  369.   toggleZoom({keepScale} = {}) {
  370.     const p = ai.popup;
  371.     if (!p || !ai.scales || ai.scales.length < 2)
  372.       return;
  373.     ai.zoomed = !ai.zoomed;
  374.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  375.     if (ai.zooming)
  376.       p.classList.add(`${PREFIX}zooming`);
  377.     Popup.move();
  378.     Bar.updateDetails();
  379.     Status.set(ai.zoomed ? 'zoom' : false);
  380.     return ai.zoomed;
  381.   },
  382.  
  383.   updateStyles() {
  384.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  385.     Util.addStyle('rule', ai.rule.css || '');
  386.   },
  387. };
  388.  
  389. const Bar = {
  390.  
  391.   set(label, className) {
  392.     let b = ai.bar;
  393.     if (typeof label !== 'string') {
  394.       $remove(b);
  395.       ai.bar = null;
  396.       return;
  397.     }
  398.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  399.     App.updateStyles();
  400.     Bar.updateDetails();
  401.     Bar.show();
  402.     b.textContent = '';
  403.     b.innerHTML = TRUSTED.createHTML(label);
  404.     if (!b.parentNode) {
  405.       doc.body.appendChild(b);
  406.       Util.forceLayout(b);
  407.     }
  408.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  409.   },
  410.  
  411.   show(isForced) {
  412.     clearTimeout(ai.timerBar);
  413.     ai.bar.style.removeProperty('opacity');
  414.     if (isForced)
  415.       ai.bar.dataset.force = '';
  416.     else
  417.       ai.timerBar = setTimeout(Bar.hide, 3000);
  418.   },
  419.  
  420.   hide(isForced) {
  421.     if (ai.bar && (isForced || !ai.bar.dataset.force)) {
  422.       $css(ai.bar, {opacity: 0});
  423.       delete ai.bar.dataset.force;
  424.     }
  425.   },
  426.  
  427.   updateName() {
  428.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  429.     if (gi) {
  430.       const item = gi[i];
  431.       const noDesc = !gi.some(_ => _.desc);
  432.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  433.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  434.         item.desc,
  435.       ].filter(Boolean).join(' - ')}`;
  436.       Bar.set(c.trim() || ' ', 'gallery', true);
  437.     } else if ('caption' in ai) {
  438.       Bar.set(ai.caption, 'caption');
  439.     } else if (ai.tooltip) {
  440.       Bar.set(ai.tooltip.text, 'tooltip');
  441.     } else {
  442.       Bar.set(' ', 'info');
  443.     }
  444.   },
  445.  
  446.   updateDetails() {
  447.     if (!ai.bar) return;
  448.     const r = ai.rotate;
  449.     const zoom = ai.nwidth && `${
  450.       Math.round(ai.scale * 100)
  451.     }%${
  452.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  453.     }${
  454.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  455.     }, ${
  456.       ai.nwidth
  457.     } x ${
  458.       ai.nheight
  459.     } px, ${
  460.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  461.     } MP, ${
  462.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  463.     }`.replace(/\x20/g, '\xA0');
  464.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  465.       if (zoom) ai.bar.dataset.zoom = zoom;
  466.       else delete ai.bar.dataset.zoom;
  467.       Bar.show();
  468.     }
  469.   },
  470. };
  471.  
  472. const Calc = {
  473.  
  474.   aspectRatio(w, h) {
  475.     for (let rat = w / h, a, b = 0; ;) {
  476.       b++;
  477.       a = Math.round(w * b / h);
  478.       if (a > 10 && b > 10 || a > 100 || b > 100)
  479.         return rat.toFixed(2);
  480.       if (Math.abs(a / b - rat) < .01)
  481.         return `${a}:${b}`;
  482.     }
  483.   },
  484.  
  485.   frameSize(elFrame, wnd) {
  486.     if (!elFrame) return;
  487.     const r = elFrame.getBoundingClientRect();
  488.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  489.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  490.     const x = r.left < 0 ? -r.left : 0;
  491.     const y = r.top < 0 ? -r.top : 0;
  492.     return [w, h, x, y];
  493.   },
  494.  
  495.   generateScales(fit) {
  496.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  497.     const zoomStep = cfg.zoomStep / 100;
  498.     const arr = [scale];
  499.     if (fit !== 1) {
  500.       const diff = goal / scale;
  501.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  502.       const step = steps && Math.pow(diff, 1 / steps);
  503.       for (let i = steps; --i > 0;)
  504.         arr.push((scale *= step));
  505.       arr.push(scale = goal);
  506.     }
  507.     while ((scale *= zoomStep) <= ZOOM_MAX)
  508.       arr.push(scale);
  509.     return arr;
  510.   },
  511.  
  512.   measurePopup() {
  513.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  514.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  515.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  516.     if (p.clientWidth > nw) {
  517.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  518.       nh = ai.nheight = w / nw * nh | 0;
  519.       nw = ai.nwidth = w;
  520.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  521.     }
  522.     p.className = `${PREFIX}show`;
  523.     p.removeAttribute('style');
  524.     const s = getComputedStyle(p);
  525.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  526.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  527.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  528.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  529.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  530.     ai.extras = {
  531.       inw, inh,
  532.       outw, outh,
  533.       o: o2 / 2,
  534.       w: inw + outw,
  535.       h: inh + outh,
  536.     };
  537.     const fit = Math.min(
  538.       (ai.view.w - ai.extras.w) / ai.nwidth,
  539.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  540.     const isCustom = !cfg.fit && cfg.scales.length;
  541.     let cutoff = Math.min(1, fit);
  542.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  543.     if (isCustom) {
  544.       const dst = [];
  545.       for (const scale of cfg.scales) {
  546.         const val = parseFloat(scale) || fit;
  547.         dst.push(val);
  548.         if (isCustom && typeof scale === 'string') {
  549.           if (scale.includes('!')) cutoff = val;
  550.           if (scale.includes('*')) scaleZoom = val;
  551.         }
  552.       }
  553.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  554.     } else {
  555.       ai.scales = Calc.generateScales(fit);
  556.     }
  557.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  558.     ai.scaleFit = fit;
  559.     ai.scaleZoom = scaleZoom;
  560.   },
  561.  
  562.   rect() {
  563.     let {node, rule} = ai;
  564.     let n = rule.rect && node.closest(rule.rect);
  565.     if (n) return n.getBoundingClientRect();
  566.     const nested = node.getElementsByTagName('*');
  567.     let maxArea = 0;
  568.     let maxBounds;
  569.     n = node;
  570.     for (let i = 0; n; n = nested[i++]) {
  571.       const bounds = n.getBoundingClientRect();
  572.       const area = bounds.width * bounds.height;
  573.       if (area > maxArea) {
  574.         maxArea = area;
  575.         maxBounds = bounds;
  576.         node = n;
  577.       }
  578.     }
  579.     return maxBounds;
  580.   },
  581.  
  582.   scaleBiggerThan(scale, i, arr) {
  583.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  584.   },
  585.  
  586.   scaleIndex(dir) {
  587.     const i = ai.scales.indexOf(ai.scale);
  588.     if (i >= 0) return i + dir;
  589.     for (
  590.       let len = ai.scales.length,
  591.         i = dir > 0 ? 0 : len - 1;
  592.       i >= 0 && i < len;
  593.       i += dir
  594.     ) {
  595.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  596.         return i;
  597.     }
  598.     return -1;
  599.   },
  600.  
  601.   scaleForFirstZoom(keepScale) {
  602.     const z = ai.scaleZoom;
  603.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  604.   },
  605.  
  606.   updateViewSize() {
  607.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  608.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  609.     if (window === top) return;
  610.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  611.     if (w && h) {
  612.       ai.view = {w, h, x: 0, y: 0};
  613.     } else {
  614.       addEventListener('message', App.onMessageChild, true);
  615.       parent.postMessage(MSG.getViewSize, '*');
  616.     }
  617.   },
  618. };
  619.  
  620. class Config {
  621.  
  622.   constructor({data: c, save}) {
  623.     if (typeof c === 'string')
  624.       c = tryCatch(JSON.parse, c);
  625.     if (typeof c !== 'object' || !c)
  626.       c = {};
  627.     const {DEFAULTS} = Config;
  628.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  629.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  630.         '';
  631.     if (c.version !== DEFAULTS.version) {
  632.       if (typeof c.hosts === 'string')
  633.         c.hosts = c.hosts.split('\n')
  634.           .map(s => tryCatch(JSON.parse, s) || s)
  635.           .filter(Boolean);
  636.       if (c.close === true || c.close === false)
  637.         c.zoomOut = c.close ? 'auto' : 'stay';
  638.       for (const key in DEFAULTS)
  639.         if (typeof c[key] !== typeof DEFAULTS[key])
  640.           c[key] = DEFAULTS[key];
  641.       if (c.version === 3 && c.scales[0] === 0)
  642.         c.scales[0] = '0!';
  643.       for (const key in c)
  644.         if (!(key in DEFAULTS))
  645.           delete c[key];
  646.       c.version = DEFAULTS.version;
  647.       if (save)
  648.         GM.setValue('cfg', c);
  649.     }
  650.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  651.       App.globalStyle = '';
  652.     if (!Array.isArray(c.scales))
  653.       c.scales = [];
  654.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  655.     Object.assign(this, DEFAULTS, c);
  656.   }
  657.  
  658.   static async load(opts) {
  659.     opts.data = await GM.getValue('cfg');
  660.     return new Config(opts);
  661.   }
  662.  
  663.   _getCss() {
  664.     const {css} = this;
  665.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  666.   }
  667. }
  668.  
  669. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  670.   center: false,
  671.   css: '',
  672.   delay: 500,
  673.   fit: '',
  674.   globalStatus: false,
  675.   // prefer ' inside rules because " will be displayed as \"
  676.   // example: "img[src*='icon']"
  677.   hosts: [{
  678.     name: 'No popup for YouTube thumbnails',
  679.     d: 'www.youtube.com',
  680.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  681.     s: '',
  682.   }, {
  683.     name: 'No popup for SVG/PNG icons',
  684.     d: '',
  685.     e: "img[src*='icon']",
  686.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  687.     s: '',
  688.   }],
  689.   imgtab: false,
  690.   mute: false,
  691.   preload: false,
  692.   scale: 1.25,
  693.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  694.   start: 'auto',
  695.   startAlt: 'context',
  696.   startAltShown: false,
  697.   uiBackgroundColor: '#ffffff',
  698.   uiBackgroundOpacity: 100,
  699.   uiBorderColor: '#000000',
  700.   uiBorderOpacity: 100,
  701.   uiBorder: 0,
  702.   uiFadein: true,
  703.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  704.   uiShadowColor: '#000000',
  705.   uiShadowOpacity: 80,
  706.   uiShadow: 20,
  707.   uiPadding: 0,
  708.   uiMargin: 0,
  709.   version: 6,
  710.   waitLoad: false,
  711.   xhr: true,
  712.   zoom: 'context',
  713.   zoomOut: 'auto',
  714.   zoomStep: 133,
  715. });
  716.  
  717. const CspSniffer = {
  718.  
  719.   /** @type {?Object<string,string[]>} */
  720.   csp: null,
  721.   /** @type {?Promise<void>} */
  722.   initPending: null,
  723.   selfUrl: location.origin + '/',
  724.  
  725.   // will be null when done
  726.   init() {
  727.     this.initPending = this.initPending ||
  728.       fetch(location).catch(() => false).then(r => { // not using method HEAD as it breaks twitter
  729.         this.csp = r && this._parse(r.headers.get('content-security-policy'));
  730.         this.init = this.initPending = null;
  731.       });
  732.   },
  733.  
  734.   async check(url) {
  735.     await this.initPending;
  736.     const isVideo = Util.isVideoUrl(url);
  737.     let mode;
  738.     if (this.csp) {
  739.       const src = this.csp[isVideo ? 'media' : 'img'];
  740.       if (!src.some(this._srcMatches, url))
  741.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  742.     }
  743.     return [mode || ai.xhr, isVideo];
  744.   },
  745.  
  746.   _parse(csp) {
  747.     if (!csp) return;
  748.     const src = {};
  749.     const rx = /[\s;](default|img|media)-src ([^;]+)/g;
  750.     for (let m; (m = rx.exec(csp));)
  751.       src[m[1]] = m[2].trim().split(/\s+/);
  752.     if (!src.img) src.img = src.default || [];
  753.     if (!src.media) src.media = src.default || [];
  754.     for (const set of [src.img, src.media]) {
  755.       set.forEach((item, i) => {
  756.         if (item !== '*' && item.includes('*')) {
  757.           set[i] = new RegExp(
  758.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  759.             item
  760.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  761.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  762.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  763.             .replace(/[^/]$/, '$&/'));
  764.         }
  765.       });
  766.     }
  767.     return src;
  768.   },
  769.  
  770.   /** @this string */
  771.   _srcMatches(src) {
  772.     return src instanceof RegExp ? src.test(this) :
  773.       src === '*' ||
  774.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  775.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  776.   },
  777. };
  778.  
  779. const Events = {
  780.  
  781.   hoverData: null,
  782.   hoverTimer: 0,
  783.   ignoreKeyHeld: false,
  784.  
  785.   onMouseOver(e) {
  786.     let node = e.target;
  787.     Events.ignoreKeyHeld = e.shiftKey;
  788.     if (!App.isEnabled ||
  789.         e.shiftKey ||
  790.         ai.zoomed ||
  791.         node === ai.popup ||
  792.         node === doc.body ||
  793.         node === doc.documentElement ||
  794.         node === elConfig ||
  795.         ai.gallery && ai.rectHovered)
  796.       return;
  797.     if (node.shadowRoot)
  798.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  799.     // we don't want to process everything in the path of a quickly moving mouse cursor
  800.     Events.hoverData = {e, node, start: now()};
  801.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  802.   },
  803.  
  804.   onMouseOverThrottled(force) {
  805.     if (!Events.hoverData)
  806.       return;
  807.     const {start, e, node} = Events.hoverData;
  808.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  809.     const wait = force ? 0 : start + SETTLE_TIME - now();
  810.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  811.     if (Events.hoverTimer || !Util.isHovered(node))
  812.       return;
  813.     Events.hoverData = null;
  814.     if (!Ruler.rules)
  815.       Ruler.init();
  816.     const info = RuleMatcher.adaptiveFind(node);
  817.     if (info && info.url && info.node !== ai.node)
  818.       App.activate(info, e);
  819.   },
  820.  
  821.   onMouseOut(e) {
  822.     if (!e.relatedTarget && !e.shiftKey)
  823.       App.deactivate();
  824.   },
  825.  
  826.   onMouseOutShadow(e) {
  827.     const root = e.target.shadowRoot;
  828.     if (root) {
  829.       root.removeEventListener('mouseover', Events.onMouseOver);
  830.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  831.     }
  832.   },
  833.  
  834.   onMouseMove(e) {
  835.     Events.trackMouse(e);
  836.     if (e.shiftKey)
  837.       return;
  838.     if (!ai.zoomed && !ai.rectHovered) {
  839.       App.deactivate();
  840.     } else if (ai.zoomed) {
  841.       Popup.move();
  842.       const {cx, cy, view: {w, h}} = ai;
  843.       const bx = w / 6;
  844.       const by = h / 6;
  845.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  846.       Status.set(`${onEdge ? '+' : '-'}edge`);
  847.     }
  848.   },
  849.  
  850.   onMouseDown({shiftKey, button}) {
  851.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  852.       ai.controlled = ai.zoomed = true;
  853.     } else if (button === 2 || shiftKey) {
  854.       // Shift = ignore; RMB will be processed in onContext
  855.     } else {
  856.       App.deactivate({wait: true});
  857.       doc.addEventListener('mouseup', App.enable, {once: true});
  858.     }
  859.   },
  860.  
  861.   onMouseScroll(e) {
  862.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  863.     if (ai.zoomed) {
  864.       Events.zoomInOut(dir);
  865.     } else if (ai.gNum > 1 && ai.popup) {
  866.       Gallery.next(-dir);
  867.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  868.       App.toggleZoom();
  869.     } else {
  870.       App.deactivate();
  871.       return;
  872.     }
  873.     dropEvent(e);
  874.   },
  875.  
  876.   onKeyDown(e) {
  877.     // Synthesized events may be of the wrong type and not have a `key`
  878.     const key = eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  879.     const p = ai.popup || false; // simple polyfill for `p?.foo`
  880.     if (!p &&
  881.         !Events.ignoreKeyHeld &&
  882.         key === '^Control' &&
  883.         (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)) {
  884.       dropEvent(e);
  885.       if (Events.hoverData) {
  886.         Events.hoverData.e = e;
  887.         Events.onMouseOverThrottled(true);
  888.       }
  889.       if (ai.node) {
  890.         ai.force = true;
  891.         App.start();
  892.       }
  893.     }
  894.     if (!p || e.repeat)
  895.       return;
  896.     switch (key) {
  897.       case '+Shift':
  898.         if (ai.shiftKeyTime)
  899.           return;
  900.         ai.shiftKeyTime = now();
  901.         Status.set('+shift');
  902.         Bar.show(true);
  903.         if (p.tagName === 'VIDEO')
  904.           p.controls = true;
  905.         return;
  906.       case 'KeyA':
  907.         if (!p.hasAttribute('data-no-aa'))
  908.           p.setAttribute('data-no-aa', '');
  909.         else
  910.           p.removeAttribute('data-no-aa');
  911.         break;
  912.       case 'ArrowRight':
  913.       case 'KeyJ':
  914.         Gallery.next(1);
  915.         break;
  916.       case 'ArrowLeft':
  917.       case 'KeyK':
  918.         Gallery.next(-1);
  919.         break;
  920.       case 'KeyD':
  921.         Remoting.saveFile();
  922.         break;
  923.       case 'KeyH': // flip horizontally
  924.       case 'KeyV': // flip vertically
  925.       case 'KeyL': // rotate left
  926.       case 'KeyR': // rotate right
  927.         if (!p)
  928.           return;
  929.         if (key === 'KeyH' || key === 'KeyV') {
  930.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  931.           ai[side] = !ai[side];
  932.         } else {
  933.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  934.         }
  935.         Bar.updateDetails();
  936.         Popup.move();
  937.         break;
  938.       case 'KeyM':
  939.         if (p.tagName === 'VIDEO')
  940.           p.muted = !p.muted;
  941.         break;
  942.       case 'KeyT':
  943.         GM.openInTab(Util.tabFixUrl() || p.src);
  944.         App.deactivate();
  945.         break;
  946.       case 'Minus':
  947.       case 'NumpadSubtract':
  948.         if (ai.zoomed) {
  949.           Events.zoomInOut(-1);
  950.         } else {
  951.           App.toggleZoom();
  952.         }
  953.         break;
  954.       case 'Equal':
  955.       case 'NumpadAdd':
  956.         if (ai.zoomed) {
  957.           Events.zoomInOut(1);
  958.         } else {
  959.           App.toggleZoom();
  960.         }
  961.         break;
  962.       case 'Escape':
  963.         App.deactivate({wait: true});
  964.         break;
  965.       case '!Alt':
  966.         return;
  967.       default:
  968.         App.deactivate({wait: true});
  969.         return;
  970.     }
  971.     dropEvent(e);
  972.   },
  973.  
  974.   onKeyUp(e) {
  975.     if (e.key === 'Shift' && ai.shiftKeyTime) {
  976.       Status.set('-shift');
  977.       Bar.hide(true);
  978.       if ((ai.popup || {}).controls)
  979.         ai.popup.controls = false;
  980.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  981.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  982.         ai.controlled = false;
  983.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  984.         App.toggleZoom();
  985.       else
  986.         App.deactivate({wait: true});
  987.       ai.shiftKeyTime = 0;
  988.     }
  989.   },
  990.  
  991.   onContext(e) {
  992.     if (Events.ignoreKeyHeld)
  993.       return;
  994.     const p = ai.popup;
  995.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  996.       dropEvent(e);
  997.     } else if (!p && (
  998.       cfg.start === 'context' ||
  999.       cfg.start === 'contextMK' ||
  1000.       cfg.start === 'contextM' && (e.button === 2) ||
  1001.       cfg.start === 'contextK' && (e.button !== 2) ||
  1002.       (cfg.start === 'auto' && ai.rule.manual)
  1003.     )) {
  1004.       // right-clicked on an image while the context menu is shown for something else
  1005.       if (!ai.node && !Events.hoverData)
  1006.         Events.onMouseOver(e);
  1007.       Events.onMouseOverThrottled(true);
  1008.       if (ai.node) {
  1009.         ai.force = true;
  1010.         App.start();
  1011.         dropEvent(e);
  1012.       }
  1013.     } else if (p) {
  1014.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1015.     }
  1016.   },
  1017.  
  1018.   pierceShadow(node, x, y) {
  1019.     for (let root; (root = node.shadowRoot);) {
  1020.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1021.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1022.       const inner = root.elementFromPoint(x, y);
  1023.       if (!inner || inner === node)
  1024.         break;
  1025.       node = inner;
  1026.     }
  1027.     return node;
  1028.   },
  1029.  
  1030.   toggle(enable) {
  1031.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1032.     const passive = {passive: true, capture: true};
  1033.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1034.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1035.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1036.     window[onOff]('keydown', Events.onKeyDown, true); // override normal page listeners
  1037.     window[onOff]('keyup', Events.onKeyUp, true);
  1038.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false});
  1039.   },
  1040.  
  1041.   trackMouse(e) {
  1042.     const cx = ai.cx = e.clientX;
  1043.     const cy = ai.cy = e.clientY;
  1044.     const r = ai.rect || (ai.rect = Calc.rect());
  1045.     ai.rectHovered =
  1046.       cx > r.left - 2 && cx < r.right + 2 &&
  1047.       cy > r.top - 2 && cy < r.bottom + 2;
  1048.   },
  1049.  
  1050.   zoomInOut(dir) {
  1051.     const i = Calc.scaleIndex(dir);
  1052.     const n = ai.scales.length;
  1053.     if (i >= 0 && i < n)
  1054.       ai.scale = ai.scales[i];
  1055.     const zo = cfg.zoomOut;
  1056.     if (i <= 0 && zo !== 'stay') {
  1057.       if (ai.scaleFit < ai.scale * .99) {
  1058.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1059.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1060.         App.deactivate({wait: true});
  1061.         return;
  1062.       }
  1063.       ai.zoomed = zo !== 'unzoom';
  1064.     } else {
  1065.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1066.     }
  1067.     if (ai.zooming)
  1068.       ai.popup.classList.add(`${PREFIX}zooming`);
  1069.     Popup.move();
  1070.     Bar.updateDetails();
  1071.   },
  1072. };
  1073.  
  1074. const Gallery = {
  1075.  
  1076.   functionParams: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  1077.  
  1078.   makeParser(g) {
  1079.     return (
  1080.       typeof g === 'function' ? g :
  1081.         typeof g === 'string' ? Util.newFunction(...Gallery.functionParams, g) :
  1082.           Gallery.defaultParser
  1083.     );
  1084.   },
  1085.  
  1086.   findIndex(gUrl) {
  1087.     const sel = gUrl.split('#')[1];
  1088.     if (!sel)
  1089.       return 0;
  1090.     if (/^\d+$/.test(sel))
  1091.       return parseInt(sel);
  1092.     for (let i = ai.gNum; i--;) {
  1093.       let {url} = ai.gItems[i];
  1094.       if (Array.isArray(url))
  1095.         url = url[0];
  1096.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  1097.         return i;
  1098.     }
  1099.     return 0;
  1100.   },
  1101.  
  1102.   next(dir) {
  1103.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1104.     const item = ai.gItems[ai.gIndex];
  1105.     if (Array.isArray(item.url)) {
  1106.       ai.urls = item.url.slice(1);
  1107.       ai.url = item.url[0];
  1108.     } else {
  1109.       ai.urls = null;
  1110.       ai.url = item.url;
  1111.     }
  1112.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1113.     App.startSingle();
  1114.     Bar.updateName();
  1115.   },
  1116.  
  1117.   nextIndex(dir) {
  1118.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1119.   },
  1120.  
  1121.   defaultParser(text, doc, docUrl, m, rule) {
  1122.     const {g} = rule;
  1123.     const qEntry = g.entry;
  1124.     const qCaption = ensureArray(g.caption);
  1125.     const qImage = g.image || 'img';
  1126.     const qTitle = g.title;
  1127.     const fix =
  1128.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1129.       (s => s.trim());
  1130.     const items = [...$$(qEntry || qImage, doc)]
  1131.       .map(processEntry)
  1132.       .filter(Boolean);
  1133.     items.title = processTitle();
  1134.     items.index =
  1135.       typeof g.index === 'string' &&
  1136.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1137.       RX_HAS_CODE.test(g.index) &&
  1138.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1139.       g.index;
  1140.     return items;
  1141.  
  1142.     function processEntry(entry) {
  1143.       const item = {};
  1144.       try {
  1145.         const img = qEntry ? $(qImage, entry) : entry;
  1146.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1147.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1148.       } catch (e) {}
  1149.       return item.url && item;
  1150.     }
  1151.  
  1152.     function processCaption(selector) {
  1153.       const el = $(selector, this) ||
  1154.                  $orSelf(selector, this.previousElementSibling) ||
  1155.                  $orSelf(selector, this.nextElementSibling);
  1156.       return el && fix(el.textContent);
  1157.     }
  1158.  
  1159.     function processTitle() {
  1160.       const el = $(qTitle, doc);
  1161.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1162.     }
  1163.  
  1164.     function $orSelf(selector, el) {
  1165.       if (el && !el.matches(qEntry))
  1166.         return el.matches(selector) ? el : $(selector, el);
  1167.     }
  1168.   },
  1169. };
  1170.  
  1171. const Menu = window === top && GM.registerMenuCommand && {
  1172.   curAltName: '',
  1173.   unreg: GM.unregisterMenuCommand,
  1174.   makeAltName: () => Menu.unreg
  1175.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1176.     : 'MPIV: toggle auto-start',
  1177.   register() {
  1178.     GM.registerMenuCommand('MPIV: configure', setup);
  1179.     Menu.registerAlt();
  1180.   },
  1181.   registerAlt() {
  1182.     if (cfg.startAltShown) {
  1183.       Menu.curAltName = Menu.makeAltName();
  1184.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1185.     }
  1186.   },
  1187.   reRegisterAlt() {
  1188.     const old = Menu.curAltName;
  1189.     if (old && Menu.unreg) Menu.unreg(old);
  1190.     if (!old || Menu.unreg) Menu.registerAlt();
  1191.   },
  1192.   onAltToggled() {
  1193.     const wasAuto = cfg.start === 'auto';
  1194.     if (wasAuto) {
  1195.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1196.     } else {
  1197.       cfg.startAlt = cfg.start;
  1198.       cfg.start = 'auto';
  1199.     }
  1200.     Menu.reRegisterAlt();
  1201.   },
  1202. };
  1203.  
  1204. const Popup = {
  1205.  
  1206.   async create(src, pageUrl) {
  1207.     const inGallery = !cfg.uiFadeinGallery && ai.gItems && ai.popup && !ai.zooming &&
  1208.       (ai.popup.dataset.galleryFlip = '') === '';
  1209.     Popup.destroy();
  1210.     ai.imageUrl = src;
  1211.     if (!src)
  1212.       return;
  1213.     const myAi = ai;
  1214.     let [xhr, isVideo] = await CspSniffer.check(src);
  1215.     if (ai !== myAi)
  1216.       return;
  1217.     if (xhr)
  1218.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1219.     if (ai !== myAi || !src)
  1220.       return;
  1221.     const p = ai.popup = isVideo ? await PopupVideo.create() : $create('img');
  1222.     p.id = `${PREFIX}popup`;
  1223.     p.src = src;
  1224.     p.addEventListener('error', App.handleError);
  1225.     if (ai.zooming)
  1226.       p.addEventListener('transitionend', Popup.onZoom);
  1227.     if (inGallery) {
  1228.       p.dataset.galleryFlip = '';
  1229.       p.setAttribute('loaded', '');
  1230.     }
  1231.     doc.body.insertBefore(p, ai.bar || undefined);
  1232.     await 0;
  1233.     if (App.checkProgress({start: true}) === false)
  1234.       return;
  1235.     if (p.complete)
  1236.       Popup.onLoad.call(ai.popup);
  1237.     else if (!isVideo)
  1238.       p.addEventListener('load', Popup.onLoad, {once: true});
  1239.   },
  1240.  
  1241.   destroy() {
  1242.     const p = ai.popup;
  1243.     if (!p) return;
  1244.     p.removeEventListener('load', Popup.onLoad);
  1245.     p.removeEventListener('error', App.handleError);
  1246.     if (typeof p.pause === 'function')
  1247.       p.pause();
  1248.     if (ai.blobUrl)
  1249.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1250.     p.remove();
  1251.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1252.   },
  1253.  
  1254.   move() {
  1255.     let x, y;
  1256.     const {cx, cy, extras, view} = ai;
  1257.     const vw = view.w - extras.outw;
  1258.     const vh = view.h - extras.outh;
  1259.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1260.     const h0 = ai.scale * ai.nheight + extras.inh;
  1261.     const isSwapped = ai.rotate % 180;
  1262.     const w = isSwapped ? h0 : w0;
  1263.     const h = isSwapped ? w0 : h0;
  1264.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1265.       const r = ai.rect;
  1266.       const rx = (r.left + r.right) / 2;
  1267.       const ry = (r.top + r.bottom) / 2;
  1268.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1269.         if (h < vh - 60)
  1270.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1271.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1272.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1273.         if (w < vw - 60)
  1274.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1275.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1276.       }
  1277.     }
  1278.     if (x == null) {
  1279.       x = vw > w
  1280.         ? (vw - w) / 2 + view.x
  1281.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1282.     }
  1283.     if (y == null) {
  1284.       y = vh > h
  1285.         ? (vh - h) / 2 + view.y
  1286.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1287.     }
  1288.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1289.     x += extras.o - diff;
  1290.     y += extras.o + diff;
  1291.     $css(ai.popup, {
  1292.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1293.                  `rotate(${ai.rotate || 0}deg) ` +
  1294.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1295.       width: `${Math.round(w0)}px`,
  1296.       height: `${Math.round(h0)}px`,
  1297.     });
  1298.   },
  1299.  
  1300.   onLoad() {
  1301.     if (this === ai.popup) {
  1302.       this.setAttribute('loaded', '');
  1303.       ai.popupLoaded = true;
  1304.       Status.set('-loading');
  1305.       if (ai.preloadUrl) {
  1306.         $create('img', {src: ai.preloadUrl});
  1307.         ai.preloadUrl = null;
  1308.       }
  1309.     }
  1310.   },
  1311.  
  1312.   onZoom() {
  1313.     this.classList.remove(`${PREFIX}zooming`);
  1314.   },
  1315. };
  1316.  
  1317. const PopupVideo = {
  1318.   async create() {
  1319.     ai.bufBar = false;
  1320.     ai.bufStart = now();
  1321.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1322.     return $create('video', {
  1323.       autoplay: true,
  1324.       controls: shouldMute,
  1325.       muted: shouldMute,
  1326.       loop: true,
  1327.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1328.       onprogress: PopupVideo.progress,
  1329.       oncanplaythrough: PopupVideo.progressDone,
  1330.       onvolumechange: PopupVideo.rememberVolume,
  1331.     });
  1332.   },
  1333.  
  1334.   progress() {
  1335.     const {duration} = this;
  1336.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1337.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1338.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1339.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1340.     }
  1341.   },
  1342.  
  1343.   progressDone() {
  1344.     this.onprogress = this.oncanplaythrough = null;
  1345.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1346.       Bar.set(false);
  1347.     Popup.onLoad.call(this);
  1348.   },
  1349.  
  1350.   rememberVolume() {
  1351.     GM.setValue('volume', this.volume);
  1352.   },
  1353. };
  1354.  
  1355. const Ruler = {
  1356. /*
  1357.  'u' works only with URLs so it's ignored if 'html' is true
  1358.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1359.    |foo = url or text must start with foo
  1360.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1361.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1362.  'r' is checked only if 'u' matches first
  1363. */
  1364.   init() {
  1365.     const errors = new Map();
  1366.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1367.     for (const rule of errors.keys())
  1368.       App.handleError('Invalid custom host rule:', rule);
  1369.  
  1370.     // rules that disable previewing
  1371.     const disablers = [
  1372.       dotDomain.endsWith('.stackoverflow.com') && {
  1373.         e: '.post-tag, .post-tag img',
  1374.         s: '',
  1375.       },
  1376.       {
  1377.         u: '||disqus.com/',
  1378.         s: '',
  1379.       },
  1380.     ];
  1381.  
  1382.     // optimization: a rule is created only when on domain
  1383.     const perDomain = [
  1384.       hostname.includes('startpage') && {
  1385.         r: /\boiu=(.+)/,
  1386.         s: '$1',
  1387.         follow: true,
  1388.       },
  1389.       dotDomain.endsWith('.4chan.org') && {
  1390.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1391.         q: '.op .fileText a',
  1392.         css: '#post-preview{display:none}',
  1393.       },
  1394.       hostname.includes('amazon.') && {
  1395.         r: /.+?images\/I\/.+?\./,
  1396.         s: m => {
  1397.           const uh = doc.getElementById('universal-hover');
  1398.           return uh ? '' : m[0] + 'jpg';
  1399.         },
  1400.         css: '#zoomWindow{display:none!important;}',
  1401.       },
  1402.       dotDomain.endsWith('.bing.com') && {
  1403.         e: 'a[m*="murl"]',
  1404.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1405.         s: '$1',
  1406.         html: true,
  1407.       },
  1408.       ...dotDomain.endsWith('.deviantart.com') && [{
  1409.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1410.         s: (m, node) =>
  1411.           $propUp(node, 'data-super-full-img') ||
  1412.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1413.           node.dataset.embedId && node.src,
  1414.       }, {
  1415.         e: '.dev-view-deviation img',
  1416.         s: () => [
  1417.           $('.dev-page-download').href,
  1418.           $('.dev-content-full').src,
  1419.         ].filter(Boolean),
  1420.       }, {
  1421.         e: 'a[data-hook=deviation_link]',
  1422.         q: 'link[as=image]',
  1423.       }] || [],
  1424.       dotDomain.endsWith('.dropbox.com') && {
  1425.         r: /(.+?&size_mode)=\d+(.*)/,
  1426.         s: '$1=5$2',
  1427.       },
  1428.       dotDomain.endsWith('.facebook.com') && {
  1429.         e: 'a[href*="ref=hovercard"]',
  1430.         s: (m, node) =>
  1431.           'https://www.facebook.com/photo.php?fbid=' +
  1432.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1433.         follow: true,
  1434.       },
  1435.       dotDomain.endsWith('.facebook.com') && {
  1436.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1437.         s: (m, node) =>
  1438.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1439.             decodeURIComponent(m[4]),
  1440.         html: true,
  1441.         follow: true,
  1442.       },
  1443.       dotDomain.endsWith('.flickr.com') &&
  1444.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1445.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1446.         s: m => `https://www.flickr.com/services/rest/?${
  1447.           new URLSearchParams({
  1448.             photo_id: m[1],
  1449.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1450.             method: 'flickr.photos.getSizes',
  1451.             format: 'json',
  1452.             nojsoncallback: 1,
  1453.           }).toString()}`,
  1454.         q: text => JSON.parse(text).sizes.size.pop().source,
  1455.       },
  1456.       dotDomain.endsWith('.github.com') && {
  1457.         r: new RegExp([
  1458.           /(avatars.+?&s=)\d+/,
  1459.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1460.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1461.         ].map(rx => rx.source).join('|')),
  1462.         s: m => `https://${
  1463.           m[1] ? `${m[1]}460` :
  1464.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1465.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1466.         }`,
  1467.       },
  1468.       isGoogleImages && {
  1469.         e: 'a[href*="imgres?imgurl="] img',
  1470.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1471.         follow: true,
  1472.       },
  1473.       isGoogleImages && {
  1474.         e: '[data-tbnid] a:not([href])',
  1475.         s: (m, a) => {
  1476.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1477.           new MutationObserver((_, mo) => {
  1478.             mo.disconnect();
  1479.             App.isEnabled = true;
  1480.             a.alt = a2.innerText;
  1481.             const {left, top} = a.getBoundingClientRect();
  1482.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1483.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1484.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1485.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1486.         },
  1487.       },
  1488.       dotDomain.endsWith('.instagram.com') && {
  1489.         e: 'a[href*="/p/"],' +
  1490.           'article [role="button"][tabindex="0"],' +
  1491.           'article [role="button"][tabindex="0"] div',
  1492.         s: (m, node, rule) => {
  1493.           let data, a, n, img, src;
  1494.           if (location.pathname.startsWith('/p/')) {
  1495.             img = $('img[srcset], video', node.parentNode);
  1496.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1497.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1498.           }
  1499.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1500.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1501.             data = a && tryCatch(rule._getEdge, a.pathname.split('/')[2]);
  1502.           }
  1503.           const numPics = a && tryCatch(() => data.edge_sidecar_to_children.edges.length);
  1504.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1505.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1506.           rule.follow = !data && !rule.g;
  1507.           rule._data = data;
  1508.           rule._img = img;
  1509.           return (
  1510.             !a && !src ? false :
  1511.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1512.                 data.video_url || data.display_url);
  1513.         },
  1514.         c: (html, doc, node, rule) =>
  1515.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1516.         follow: true,
  1517.         _q: 'meta[property="og:video"]',
  1518.         _g(text, doc, url, m, rule) {
  1519.           const media = JSON.parse(text).graphql.shortcode_media;
  1520.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1521.             url: e.node.video_url || e.node.display_url,
  1522.           }));
  1523.           items.title = tryCatch(rule._getCaption, media) || '';
  1524.           return items;
  1525.         },
  1526.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1527.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1528.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1529.       },
  1530.       ...dotDomain.endsWith('.reddit.com') && [{
  1531.         u: '||i.reddituploads.com/',
  1532.       }, {
  1533.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1534.         s: (m, node) => $propUp(node, 'data-url'),
  1535.       }, {
  1536.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1537.         s: 'https://i$1',
  1538.       }] || [],
  1539.       dotDomain.endsWith('.tumblr.com') && {
  1540.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1541.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1542.         follow: true,
  1543.       },
  1544.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1545.         e: 'a.media-item, a.js-media-image-link',
  1546.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1547.         follow: true,
  1548.       },
  1549.       dotDomain.endsWith('.twitter.com') && {
  1550.         e: '.grid-tweet > .media-overlay',
  1551.         s: (m, node) => node.previousElementSibling.src,
  1552.         follow: true,
  1553.       },
  1554.     ];
  1555.  
  1556.     const main = [
  1557.       {
  1558.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1559.         s: '$1',
  1560.         follow: true,
  1561.         onerror: 'skip',
  1562.       },
  1563.       {
  1564.         u: [
  1565.           '||500px.com/photo/',
  1566.           '||cl.ly/',
  1567.           '||cweb-pix.com/',
  1568.           '//ibb.co/',
  1569.           '||imgcredit.xyz/image/',
  1570.         ],
  1571.         r: /\.\w+\/.+/,
  1572.         q: 'meta[property="og:image"]',
  1573.       },
  1574.       {
  1575.         u: 'attachment.php',
  1576.         r: /attachment\.php.+attachmentid/,
  1577.       },
  1578.       {
  1579.         u: '||abload.de/image',
  1580.         q: '#image',
  1581.       },
  1582.       {
  1583.         u: '||deviantart.com/art/',
  1584.         s: (m, node) =>
  1585.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1586.             '' :
  1587.             m.input,
  1588.         q: [
  1589.           '#download-button[href*=".jpg"]',
  1590.           '#download-button[href*=".jpeg"]',
  1591.           '#download-button[href*=".gif"]',
  1592.           '#download-button[href*=".png"]',
  1593.           '#gmi-ResViewSizer_fullimg',
  1594.           'img.dev-content-full',
  1595.         ],
  1596.       },
  1597.       {
  1598.         u: '||dropbox.com/s',
  1599.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1600.         q: (text, doc) =>
  1601.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1602.       },
  1603.       {
  1604.         r: /[./]ebay\.[^/]+\/itm\//,
  1605.         q: text =>
  1606.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1607.             .replace(/~~60_\d+/, '~~60_57'),
  1608.       },
  1609.       {
  1610.         u: '||i.ebayimg.com/',
  1611.         s: (m, node) =>
  1612.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1613.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1614.       },
  1615.       {
  1616.         u: '||fastpic.',
  1617.         e: 'a[href*="fastpic"][href*=".html"]',
  1618.         s: m => m[0].replace('http:', 'https:').replace('fastpic.ru', 'fastpic.org'),
  1619.         q: 'img[src*="/big/"]',
  1620.       },
  1621.       {
  1622.         u: '||facebook.com/',
  1623.         r: /photo\.php|[^/]+\/photos\//,
  1624.         s: (m, node) =>
  1625.           node.id === 'fbPhotoImage' ? false :
  1626.             /gradient\.png$/.test(m.input) ? '' :
  1627.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1628.         q: [
  1629.           'div + span > a:first-child:not([href*="tag_faces"])',
  1630.           'div + span > a[href*="tag_faces"] ~ a',
  1631.         ],
  1632.         rect: '#fbProfileCover',
  1633.       },
  1634.       {
  1635.         u: '||fbcdn.',
  1636.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1637.         s: m =>
  1638.           dotDomain.endsWith('.facebook.com') &&
  1639.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1640.           false,
  1641.         manual: true,
  1642.       },
  1643.       {
  1644.         u: ['||fbcdn-', 'fbcdn.net/'],
  1645.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1646.         s: (m, node) => {
  1647.           if (node.id === 'fbPhotoImage') {
  1648.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1649.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1650.           }
  1651.           if (m[4])
  1652.             return false;
  1653.           const pn = node.parentNode;
  1654.           if (pn.outerHTML.includes('/hovercard/'))
  1655.             return '';
  1656.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1657.             return false;
  1658.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1659.         },
  1660.         rect: '.photoWrap',
  1661.       },
  1662.       {
  1663.         u: '||flickr.com/photos/',
  1664.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1665.         s: m =>
  1666.           m.input.indexOf('/sizes/') < 0 ?
  1667.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1668.             false,
  1669.         q: (text, doc) => {
  1670.           const links = $$('.sizes-list a', doc);
  1671.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1672.         },
  1673.         follow: true,
  1674.       },
  1675.       {
  1676.         u: '||flickr.com/photos/',
  1677.         r: /\/sizes\//,
  1678.         q: '#allsizes-photo > img',
  1679.       },
  1680.       {
  1681.         u: '||gfycat.com/',
  1682.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1683.         s: 'https://$1$3',
  1684.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1685.       },
  1686.       {
  1687.         u: [
  1688.           '||googleusercontent.com/proxy',
  1689.           '||googleusercontent.com/gadgets/proxy',
  1690.         ],
  1691.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1692.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1693.       },
  1694.       {
  1695.         u: [
  1696.           '||googleusercontent.com/',
  1697.           '||ggpht.com/',
  1698.         ],
  1699.         s: m => m.input.includes('webcache.') ? '' :
  1700.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1701.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1702.       },
  1703.       {
  1704.         u: '||gravatar.com/',
  1705.         r: /([a-z0-9]{32})/,
  1706.         s: 'https://gravatar.com/avatar/$1?s=200',
  1707.       },
  1708.       {
  1709.         u: '//gyazo.com/',
  1710.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1711.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1712.         _q: 'meta[name="twitter:image"]',
  1713.       },
  1714.       {
  1715.         u: '||hostingkartinok.com/show-image.php',
  1716.         q: '.image img',
  1717.       },
  1718.       {
  1719.         u: [
  1720.           '||imagecurl.com/images/',
  1721.           '||imagecurl.com/viewer.php',
  1722.         ],
  1723.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1724.         s: 'https://imagecurl.com/images/$1$2$3',
  1725.       },
  1726.       {
  1727.         u: '||imagebam.com/image/',
  1728.         q: 'meta[property="og:image"]',
  1729.         tabfix: true,
  1730.         xhr: hostname.includes('planetsuzy'),
  1731.       },
  1732.       {
  1733.         u: '||imageban.ru/thumbs',
  1734.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1735.         s: '$1out$2/$3/$4',
  1736.       },
  1737.       {
  1738.         u: [
  1739.           '||imageban.ru/show',
  1740.           '||imageban.net/show',
  1741.           '||ibn.im/',
  1742.         ],
  1743.         q: '#img_main',
  1744.       },
  1745.       {
  1746.         u: '||imageshack.us/img',
  1747.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1748.         s: 'https://$2/download/$1/$3$4',
  1749.       },
  1750.       {
  1751.         u: '||imageshack.us/i/',
  1752.         q: '#share-dl',
  1753.       },
  1754.       {
  1755.         u: '||imageteam.org/img',
  1756.         q: 'img[alt="image"]',
  1757.       },
  1758.       {
  1759.         u: [
  1760.           '||imagetwist.com/',
  1761.           '||imageshimage.com/',
  1762.         ],
  1763.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1764.         q: 'img.pic',
  1765.         xhr: true,
  1766.       },
  1767.       {
  1768.         u: '||imageupper.com/i/',
  1769.         q: '#img',
  1770.         xhr: true,
  1771.       },
  1772.       {
  1773.         u: '||imagevenue.com/',
  1774.         q: 'a[data-toggle="full"] img',
  1775.       },
  1776.       {
  1777.         u: '||imagezilla.net/show/',
  1778.         q: '#photo',
  1779.         xhr: true,
  1780.       },
  1781.       {
  1782.         u: [
  1783.           '||images-na.ssl-images-amazon.com/images/',
  1784.           '||media-imdb.com/images/',
  1785.         ],
  1786.         r: /images\/.+?\.jpg/,
  1787.         s: '/V1\\.?_.+?\\.//g',
  1788.       },
  1789.       {
  1790.         u: '||imgbox.com/',
  1791.         r: /\.com\/([a-z0-9]+)$/i,
  1792.         q: '#img',
  1793.         xhr: hostname !== 'imgbox.com',
  1794.       },
  1795.       {
  1796.         u: '||imgclick.net/',
  1797.         r: /\.net\/(\w+)/,
  1798.         q: 'img.pic',
  1799.         xhr: true,
  1800.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1801.       },
  1802.       {
  1803.         u: '.imgcredit.xyz/',
  1804.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1805.         s: ['https$1$2', 'https$1.png'],
  1806.       },
  1807.       {
  1808.         u: [
  1809.           '||imgflip.com/i/',
  1810.           '||imgflip.com/gif/',
  1811.         ],
  1812.         r: /\/(i|gif)\/([^/?#]+)/,
  1813.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1814.       },
  1815.       {
  1816.         u: [
  1817.           '||imgur.com/a/',
  1818.           '||imgur.com/gallery/',
  1819.         ],
  1820.         g: async (text, doc, url, m, rule, node, cb) => {
  1821.           let u = `https://imgur.com/ajaxalbums/getimages/${url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1822.           const info = tryCatch(JSON.parse, (await Remoting.gmXhr(u)).responseText);
  1823.           const images = ((info || 0).data || 0).images;
  1824.           const items = [];
  1825.           for (const img of images || []) {
  1826.             u = `https://i.imgur.com/${img.hash}`;
  1827.             items.push({
  1828.               url: img.ext === '.gif' && img.animated !== false ?
  1829.                 [`${u}.webm`, `${u}.mp4`, u] :
  1830.                 u + img.ext,
  1831.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1832.             });
  1833.           }
  1834.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1835.             items.title = info.title;
  1836.           cb(items);
  1837.         },
  1838.         css: '.post > .hover { display:none!important; }',
  1839.       },
  1840.       {
  1841.         u: '||imgur.com/',
  1842.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1843.         s: 'gallery',
  1844.         g: (text, doc, url, m) =>
  1845.           m[2].split(',').map(id => ({
  1846.             url: `https://i.${m[1]}${id}.jpg`,
  1847.           })),
  1848.       },
  1849.       {
  1850.         u: '||imgur.com/',
  1851.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1852.         s: (m, node) => {
  1853.           if (/memegen|random|register|search|signin/.test(m.input))
  1854.             return '';
  1855.           const a = node.closest('a');
  1856.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1857.             return false;
  1858.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1859.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1860.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1861.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1862.           return ext === 'webm' ?
  1863.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1864.             u + ext;
  1865.         },
  1866.       },
  1867.       {
  1868.         u: [
  1869.           '||instagr.am/p/',
  1870.           '||instagram.com/p/',
  1871.         ],
  1872.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') + '/?__a=1',
  1873.         q: text => {
  1874.           const m = JSON.parse(text).graphql.shortcode_media;
  1875.           return m.video_url || m.display_url;
  1876.         },
  1877.         rect: 'div.PhotoGridMediaItem',
  1878.         c: text => {
  1879.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1880.           return m === undefined ? '(no caption)' : m.node.text;
  1881.         },
  1882.       },
  1883.       {
  1884.         u: [
  1885.           '||livememe.com/',
  1886.           '||lvme.me/',
  1887.         ],
  1888.         r: /\.\w+\/([^.]+)$/,
  1889.         s: 'http://i.lvme.me/$1.jpg',
  1890.       },
  1891.       {
  1892.         u: '||lostpic.net/image',
  1893.         q: '.image-viewer-image img',
  1894.       },
  1895.       {
  1896.         u: '||makeameme.org/meme/',
  1897.         r: /\/meme\/([^/?#]+)/,
  1898.         s: 'https://media.makeameme.org/created/$1.jpg',
  1899.       },
  1900.       {
  1901.         u: '||photobucket.com/',
  1902.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1903.         s: 'https://i$1$3',
  1904.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1905.       },
  1906.       {
  1907.         u: '||piccy.info/view3/',
  1908.         r: /(.+?\/view3)\/(.*)\//,
  1909.         s: '$1/$2/orig/',
  1910.         q: '#mainim',
  1911.       },
  1912.       {
  1913.         u: '||pimpandhost.com/image/',
  1914.         r: /(.+?\/image\/[0-9]+)/,
  1915.         s: '$1?size=original',
  1916.         q: 'img.original',
  1917.       },
  1918.       {
  1919.         u: [
  1920.           '||pixroute.com/',
  1921.           '||imgspice.com/',
  1922.         ],
  1923.         r: /\.html$/,
  1924.         q: 'img[id]',
  1925.         xhr: true,
  1926.       },
  1927.       {
  1928.         u: '||postima',
  1929.         r: /postima?ge?\.org\/image\/\w+/,
  1930.         q: [
  1931.           'a[href*="dl="]',
  1932.           '#main-image',
  1933.         ],
  1934.       },
  1935.       {
  1936.         u: [
  1937.           '||prntscr.com/',
  1938.           '||prnt.sc/',
  1939.         ],
  1940.         r: /\.\w+\/.+/,
  1941.         q: 'meta[property="og:image"]',
  1942.         xhr: true,
  1943.       },
  1944.       {
  1945.         u: '||radikal.ru/',
  1946.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  1947.         s: (m, node, rule) =>
  1948.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  1949.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  1950.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  1951.       },
  1952.       {
  1953.         u: '||tumblr.com',
  1954.         r: /_500\.jpg/,
  1955.         s: ['/_500/_1280/', ''],
  1956.       },
  1957.       {
  1958.         u: '||twimg.com/',
  1959.         r: /\/profile_images/i,
  1960.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1961.       },
  1962.       {
  1963.         u: '||twimg.com/media/',
  1964.         r: /.+?format=(jpe?g|png|gif)/i,
  1965.         s: '$0&name=orig',
  1966.       },
  1967.       {
  1968.         u: '||twimg.com/1/proxy',
  1969.         r: /t=([^&_]+)/i,
  1970.         s: m => atob(m[1]).match(/http.+/),
  1971.       },
  1972.       {
  1973.         u: '||pic.twitter.com/',
  1974.         r: /\.com\/[a-z0-9]+/i,
  1975.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1976.         follow: true,
  1977.       },
  1978.       {
  1979.         u: '||twitpic.com/',
  1980.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1981.         s: 'https://twitpic.com/show/large/$2',
  1982.       },
  1983.       {
  1984.         u: '||wiki',
  1985.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1986.         s: '/\\/thumb(?=\\/)|' +
  1987.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1988.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1989.         xhr: !hostname.includes('wiki'),
  1990.       },
  1991.       {
  1992.         u: '||ytimg.com/vi/',
  1993.         r: /(.+?\/vi\/[^/]+)/,
  1994.         s: '$1/0.jpg',
  1995.         rect: '.video-list-item',
  1996.       },
  1997.       {
  1998.         u: '/viewer.php?file=',
  1999.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2000.         s: '$1/images/$2',
  2001.         xhr: true,
  2002.       },
  2003.       {
  2004.         u: '/thumb_',
  2005.         r: /\/albums.+\/thumb_[^/]/,
  2006.         s: '/thumb_//',
  2007.       },
  2008.       {
  2009.         u: [
  2010.           '.th.jp',
  2011.           '.th.gif',
  2012.           '.th.png',
  2013.         ],
  2014.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2015.         s: '$1$2',
  2016.         follow: true,
  2017.       },
  2018.       {
  2019.         r: RX_MEDIA_URL,
  2020.       },
  2021.     ];
  2022.  
  2023.     /** @type mpiv.HostRule[] */
  2024.     (Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean))
  2025.       .forEach(rule => {
  2026.         if (Array.isArray(rule.e))
  2027.           rule.e = rule.e.join(',');
  2028.       });
  2029.   },
  2030.  
  2031.   format(rule, {expand} = {}) {
  2032.     const s = Util.stringify(rule, null, ' ');
  2033.     return expand ?
  2034.       /* {"a": ...,
  2035.           "b": ...,
  2036.           "c": ...
  2037.          } */
  2038.       s.replace(/^{\s+/g, '{') :
  2039.       /* {"a": ..., "b": ..., "c": ...} */
  2040.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2041.   },
  2042.  
  2043.   fromElement(el) {
  2044.     const text = el.textContent.trim();
  2045.     if (text.startsWith('{') &&
  2046.         text.endsWith('}') &&
  2047.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2048.       const rule = tryCatch(JSON.parse, text);
  2049.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2050.     }
  2051.   },
  2052.  
  2053.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2054.  
  2055.   /** @returns mpiv.HostRule | Error | false | undefined */
  2056.   parse(rule) {
  2057.     const isBatchOp = this instanceof Map;
  2058.     try {
  2059.       if (typeof rule === 'string')
  2060.         rule = JSON.parse(rule);
  2061.       if ('d' in rule && typeof rule.d !== 'string')
  2062.         rule.d = undefined;
  2063.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2064.         return false;
  2065.       if ('e' in rule) {
  2066.         let {e} = rule;
  2067.         if (typeof e === 'string') {
  2068.           e = e.trim();
  2069.         } else if (
  2070.           Array.isArray(e) && !e.every((s, i) => typeof s === 'string' && (e[i] = s.trim())) ||
  2071.           e && !Object.entries(e).filter(Ruler.isValidE2).length
  2072.         ) {
  2073.           throw new Error('Invalid syntax for "e". Examples: ' +
  2074.             '"e": ".image" or ' +
  2075.             '"e": [".image1", ".image2"] or ' +
  2076.             '"e": {".parent": ".image"} or ' +
  2077.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2078.         }
  2079.         if (isBatchOp) rule.e = e || undefined;
  2080.       }
  2081.       const compileTo = isBatchOp ? rule : {};
  2082.       if (rule.r)
  2083.         compileTo.r = new RegExp(rule.r, 'i');
  2084.       if (RX_HAS_CODE.test(rule.s))
  2085.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  2086.       if (RX_HAS_CODE.test(rule.q))
  2087.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  2088.       if (RX_HAS_CODE.test(rule.c))
  2089.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  2090.       return rule;
  2091.     } catch (err) {
  2092.       if (/unsafe-eval|'Trusted Type'/.test(err)) {
  2093.         return rule;
  2094.       }
  2095.       if (isBatchOp) {
  2096.         this.set(rule, err);
  2097.       } else {
  2098.         return err;
  2099.       }
  2100.     }
  2101.   },
  2102.  
  2103.   runC(text, doc = document) {
  2104.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2105.     ai.caption = fn(text, doc);
  2106.   },
  2107.  
  2108.   runCHandler: {
  2109.     function: (text, doc) =>
  2110.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2111.     string: (text, doc) => {
  2112.       const el = $many(ai.rule.c, doc);
  2113.       return !el ? '' :
  2114.         el.getAttribute('content') ||
  2115.         el.getAttribute('title') ||
  2116.         el.textContent;
  2117.     },
  2118.     default: () =>
  2119.       (ai.tooltip || 0).text ||
  2120.       ai.node.alt ||
  2121.       $propUp(ai.node, 'title') ||
  2122.       Remoting.getFileName(
  2123.         ai.node.tagName === (ai.popup || 0).tagName
  2124.           ? ai.url
  2125.           : ai.node.src || $propUp(ai.node, 'href')),
  2126.   },
  2127.  
  2128.   runQ(text, doc, docUrl) {
  2129.     let url;
  2130.     if (typeof ai.rule.q === 'function') {
  2131.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2132.       if (Array.isArray(url)) {
  2133.         ai.urls = url.slice(1);
  2134.         url = url[0];
  2135.       }
  2136.     } else {
  2137.       const el = $many(ai.rule.q, doc);
  2138.       url = Remoting.findImageUrl(el, docUrl);
  2139.     }
  2140.     return url;
  2141.   },
  2142.  
  2143.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2144.   runE(rule, node) {
  2145.     const {e} = rule;
  2146.     if (typeof e === 'string')
  2147.       return node.matches(e);
  2148.     let p, img, res, info;
  2149.     for (const selParent in e) {
  2150.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2151.         if (img === node)
  2152.           res = true;
  2153.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2154.           return info;
  2155.       }
  2156.     }
  2157.     return res;
  2158.   },
  2159.  
  2160.   /** @returns {?Array} if falsy then the rule should be skipped */
  2161.   runS(node, rule, m) {
  2162.     let urls = [];
  2163.     for (const s of ensureArray(rule.s))
  2164.       urls.push(
  2165.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2166.           typeof s === 'function' ? s(m, node, rule) :
  2167.             s);
  2168.     if (rule.q && urls.length > 1) {
  2169.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2170.       return;
  2171.     }
  2172.     if (Array.isArray(urls[0]))
  2173.       urls = urls[0];
  2174.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  2175.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  2176.   },
  2177.  
  2178.   /** @returns {boolean} */
  2179.   runU(rule, url) {
  2180.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2181.     return u.fn.call(u.data, url);
  2182.   },
  2183.  
  2184.   substituteSingle(s, m) {
  2185.     if (!m || m.input == null) return s;
  2186.     if (s.startsWith('/') && !s.startsWith('//')) {
  2187.       const mid = s.search(/[^\\]\//) + 1;
  2188.       const end = s.lastIndexOf('/');
  2189.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2190.       return m.input.replace(re, s.slice(mid + 1, end));
  2191.     }
  2192.     if (m.length && s.includes('$')) {
  2193.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2194.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2195.         for (let i = maxLength; i >= 0; i--) {
  2196.           const part = num.slice(0, i) | 0;
  2197.           if (part < m.length)
  2198.             return (m[part] || '') + num.slice(i);
  2199.         }
  2200.         return text;
  2201.       });
  2202.     }
  2203.     return s;
  2204.   },
  2205.  
  2206.   toggle(rule, prop, condition) {
  2207.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2208.     return condition;
  2209.   },
  2210. };
  2211.  
  2212. const RuleMatcher = {
  2213.  
  2214.   /** @returns {Object} */
  2215.   adaptiveFind(node, opts) {
  2216.     const tn = node.tagName;
  2217.     const src = node.currentSrc || node.src;
  2218.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2219.     let a, info, url;
  2220.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2221.     if (tn !== 'A') {
  2222.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2223.       info = RuleMatcher.find(url, node, opts);
  2224.     }
  2225.     if (!info && (a = node.closest('A'))) {
  2226.       const ds = a.dataset;
  2227.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2228.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2229.       url = !url.startsWith('data:') && url;
  2230.       info = RuleMatcher.find(url, a, opts);
  2231.     }
  2232.     if (!info && isPic)
  2233.       info = {node, rule: {}, url: src};
  2234.     return info;
  2235.   },
  2236.  
  2237.   /** @returns ?mpiv.RuleMatchInfo */
  2238.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2239.     const tn = node.tagName;
  2240.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2241.     const isPicOrLink = isPic || tn === 'A';
  2242.     let m, html, info;
  2243.     for (const rule of rules || Ruler.rules) {
  2244.       if (skipRules && skipRules.includes(rule) ||
  2245.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2246.           rule.e && !rules && !(info = Ruler.runE(rule, node)))
  2247.         continue;
  2248.       if (info && info.url)
  2249.         return info;
  2250.       if (rule.r)
  2251.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2252.           ? rule.r.exec(html || (html = node.outerHTML))
  2253.           : url && rule.r.exec(url);
  2254.       else if (url)
  2255.         m = Object.assign([url], {index: 0, input: url});
  2256.       else
  2257.         m = [];
  2258.       if (!m)
  2259.         continue;
  2260.       if (rule.s === '')
  2261.         return {};
  2262.       let hasS = rule.s != null;
  2263.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2264.       // but we'll only allow it to match rules without 's' in the nested find call
  2265.       if (isPic && !hasS && !skipRules)
  2266.         continue;
  2267.       hasS &= rule.s !== 'gallery';
  2268.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2269.       if (urls)
  2270.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2271.     }
  2272.   },
  2273.  
  2274.   /** @returns ?mpiv.RuleMatchInfo */
  2275.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2276.     let info;
  2277.     let url = `${urls[0]}`;
  2278.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2279.     if (url)
  2280.       url = Util.rel2abs(url);
  2281.     else
  2282.       info = {};
  2283.     if (follow)
  2284.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2285.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2286.       const xhr = cfg.xhr && rule.xhr;
  2287.       info = {
  2288.         match,
  2289.         node,
  2290.         rule,
  2291.         url,
  2292.         urls: urls.length > 1 ? urls.slice(1) : null,
  2293.         gallery: rule.g && Gallery.makeParser(rule.g),
  2294.         post: typeof rule.post === 'function' ? rule.post(match) : rule.post,
  2295.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2296.       };
  2297.     }
  2298.     return info;
  2299.   },
  2300.  
  2301.   isFollowableUrl(url, rule) {
  2302.     const f = rule.follow;
  2303.     return typeof f === 'function' ? f(url) : f;
  2304.   },
  2305. };
  2306.  
  2307. const Remoting = {
  2308.  
  2309.   gmXhr(url, opts = {}) {
  2310.     if (ai.req)
  2311.       tryCatch.call(ai.req, ai.req.abort);
  2312.     return new Promise((resolve, reject) => {
  2313.       const {anonymous} = ai.rule || {};
  2314.       ai.req = GM.xmlHttpRequest({
  2315.         url,
  2316.         anonymous,
  2317.         withCredentials: !anonymous,
  2318.         method: 'GET',
  2319.         timeout: 30e3,
  2320.         ...opts,
  2321.         onload: done,
  2322.         onerror: done,
  2323.         ontimeout() {
  2324.           ai.req = null;
  2325.           reject(`Timeout fetching ${url}`);
  2326.         },
  2327.       });
  2328.       function done(r) {
  2329.         ai.req = null;
  2330.         if (r.status < 400 && !r.error)
  2331.           resolve(r);
  2332.         else
  2333.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2334.       }
  2335.     });
  2336.   },
  2337.  
  2338.   async getDoc(url) {
  2339.     if (!url) {
  2340.       // current document
  2341.       return {
  2342.         doc,
  2343.         finalUrl: location.href,
  2344.         responseText: doc.documentElement.outerHTML,
  2345.       };
  2346.     }
  2347.     const r = await (!ai.post ?
  2348.       Remoting.gmXhr(url) :
  2349.       Remoting.gmXhr(url, {
  2350.         method: 'POST',
  2351.         data: ai.post,
  2352.         headers: {
  2353.           'Content-Type': 'application/x-www-form-urlencoded',
  2354.           'Referer': url,
  2355.         },
  2356.       }));
  2357.     r.doc = $parseHtml(r.responseText);
  2358.     return r;
  2359.   },
  2360.  
  2361.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2362.     ai.bufBar = false;
  2363.     ai.bufStart = now();
  2364.     const response = await Remoting.gmXhr(url, {
  2365.       responseType: 'blob',
  2366.       headers: {
  2367.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2368.         Referer: pageUrl || (typeof xhr === 'function' ? xhr() : url),
  2369.       },
  2370.       onprogress: Remoting.getImageProgress,
  2371.     });
  2372.     Bar.set(false);
  2373.     const type = Remoting.guessMimeType(response);
  2374.     let b = response.response;
  2375.     if (!b) throw 'Empty response';
  2376.     if (b.type !== type)
  2377.       b = b.slice(0, b.size, type);
  2378.     const res = xhr === 'blob'
  2379.       ? (ai.blobUrl = URL.createObjectURL(b))
  2380.       : await Remoting.blobToDataUrl(b);
  2381.     return [res, type.startsWith('video')];
  2382.   },
  2383.  
  2384.   getImageProgress(e) {
  2385.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2386.       ai.bufBar = true;
  2387.     if (ai.bufBar) {
  2388.       const pct = e.loaded / e.total * 100 | 0;
  2389.       const size = e.total / 1024 | 0;
  2390.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2391.     }
  2392.   },
  2393.  
  2394.   async findRedirect() {
  2395.     try {
  2396.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2397.         method: 'HEAD',
  2398.         headers: {
  2399.           'Referer': location.href.split('#', 1)[0],
  2400.         },
  2401.       });
  2402.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2403.       if (!info || !info.url)
  2404.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2405.       Object.assign(ai, info);
  2406.       App.startSingle();
  2407.     } catch (e) {
  2408.       App.handleError(e);
  2409.     }
  2410.   },
  2411.  
  2412.   async saveFile() {
  2413.     const url = ai.popup.src || ai.popup.currentSrc;
  2414.     let name = Remoting.getFileName(ai.imageUrl || url);
  2415.     if (!name.includes('.'))
  2416.       name += '.jpg';
  2417.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2418.       $create('a', {href: url, download: name})
  2419.         .dispatchEvent(new MouseEvent('click'));
  2420.     } else {
  2421.       Status.set('+loading');
  2422.       const onload = () => Status.set('-loading');
  2423.       const gmDL = typeof GM_download === 'function';
  2424.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2425.         url,
  2426.         name,
  2427.         headers: {Referer: url},
  2428.         method: 'get', // polyfilling GM_download
  2429.         responseType: 'blob', // polyfilling GM_download
  2430.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2431.         onerror: e => {
  2432.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2433.           onload();
  2434.         },
  2435.         onprogress: Remoting.getImageProgress,
  2436.         onload({response}) {
  2437.           onload();
  2438.           if (!gmDL) { // polyfilling GM_download
  2439.             const a = Object.assign(document.createElement('a'), {
  2440.               href: URL.createObjectURL(response),
  2441.               download: name,
  2442.             });
  2443.             a.dispatchEvent(new MouseEvent('click'));
  2444.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2445.           }
  2446.         },
  2447.       });
  2448.     }
  2449.   },
  2450.  
  2451.   getFileName(url) {
  2452.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2453.   },
  2454.  
  2455.   blobToDataUrl(blob) {
  2456.     return new Promise((resolve, reject) => {
  2457.       const fr = new FileReader();
  2458.       fr.onload = () => resolve(fr.result);
  2459.       fr.onerror = reject;
  2460.       fr.readAsDataURL(blob);
  2461.     });
  2462.   },
  2463.  
  2464.   guessMimeType({responseHeaders, finalUrl}) {
  2465.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2466.         !RegExp.$1.includes('text/plain'))
  2467.       return RegExp.$1;
  2468.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2469.     switch (ext.toLowerCase()) {
  2470.       case 'bmp': return 'image/bmp';
  2471.       case 'gif': return 'image/gif';
  2472.       case 'jpe': return 'image/jpeg';
  2473.       case 'jpeg': return 'image/jpeg';
  2474.       case 'jpg': return 'image/jpeg';
  2475.       case 'mp4': return 'video/mp4';
  2476.       case 'png': return 'image/png';
  2477.       case 'svg': return 'image/svg+xml';
  2478.       case 'tif': return 'image/tiff';
  2479.       case 'tiff': return 'image/tiff';
  2480.       case 'webm': return 'video/webm';
  2481.       default: return 'application/octet-stream';
  2482.     }
  2483.   },
  2484.  
  2485.   findImageUrl(n, url) {
  2486.     if (!n) return;
  2487.     let html;
  2488.     const path =
  2489.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2490.       n.getAttribute('src') ||
  2491.       n.getAttribute('data-m4v') ||
  2492.       n.getAttribute('href') ||
  2493.       n.getAttribute('content') ||
  2494.       (html = n.outerHTML).includes('http') &&
  2495.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2496.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2497.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2498.   },
  2499. };
  2500.  
  2501. const Status = {
  2502.  
  2503.   set(status) {
  2504.     if (!status && !cfg.globalStatus) {
  2505.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  2506.       return;
  2507.     }
  2508.     const prefix = cfg.globalStatus ? PREFIX : '';
  2509.     const action = status && /^[+-]/.test(status) && status[0];
  2510.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2511.     const el = cfg.globalStatus ? doc.documentElement :
  2512.       name === 'edge' ? ai.popup :
  2513.         ai.node;
  2514.     if (!el) return;
  2515.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2516.     const oldValue = (el.getAttribute(attr) || '').trim();
  2517.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2518.     switch (action) {
  2519.       case '-':
  2520.         cls.delete(name);
  2521.         break;
  2522.       case false:
  2523.         for (const c of cls)
  2524.           if (c.startsWith(prefix) && c !== name)
  2525.             cls.delete(c);
  2526.       // fallthrough to +
  2527.       case '+':
  2528.         if (name)
  2529.           cls.add(name);
  2530.         break;
  2531.     }
  2532.     const newValue = [...cls].join(' ');
  2533.     if (newValue !== oldValue)
  2534.       el.setAttribute(attr, newValue);
  2535.   },
  2536.  
  2537.   loading(force) {
  2538.     if (!force) {
  2539.       clearTimeout(ai.timerStatus);
  2540.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2541.     } else if (!ai.popupLoaded) {
  2542.       Status.set('+loading');
  2543.     }
  2544.   },
  2545. };
  2546.  
  2547. const UrlMatcher = (() => {
  2548.   // string-to-regexp escaped chars
  2549.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2550.   // rx for '^' symbol in simple url match
  2551.   const RX_SEP = /[^\w%._-]/y;
  2552.   const RXS_SEP = RX_SEP.source;
  2553.   return match => {
  2554.     const results = [];
  2555.     for (const s of ensureArray(match)) {
  2556.       const pinDomain = s.startsWith('||');
  2557.       const pinStart = !pinDomain && s.startsWith('|');
  2558.       const endSep = s.endsWith('^');
  2559.       let fn;
  2560.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2561.       if (needle.includes('^')) {
  2562.         let plain = '';
  2563.         for (const part of needle.split('^'))
  2564.           if (part.length > plain.length)
  2565.             plain = part;
  2566.         const rx = new RegExp(
  2567.           (pinStart ? '^' : '') +
  2568.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2569.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2570.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2571.         needle = [plain, rx];
  2572.         fn = regexp;
  2573.       } else if (pinStart) {
  2574.         fn = endSep ? equals : starts;
  2575.       } else if (pinDomain) {
  2576.         const slashPos = needle.indexOf('/');
  2577.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2578.         needle = [needle, domain, slashPos > 0, endSep];
  2579.         fn = startsDomainPrescreen;
  2580.       } else if (endSep) {
  2581.         fn = ends;
  2582.       } else {
  2583.         fn = has;
  2584.       }
  2585.       results.push({fn, data: needle});
  2586.     }
  2587.     return results.length > 1 ?
  2588.       {fn: checkArray, data: results} :
  2589.       results[0];
  2590.   };
  2591.   function checkArray(s) {
  2592.     return this.some(checkArrayItem, s);
  2593.   }
  2594.   function checkArrayItem(item) {
  2595.     return item.fn.call(item.data, this);
  2596.   }
  2597.   function ends(s) {
  2598.     return s.endsWith(this) || (
  2599.       s.length > this.length &&
  2600.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2601.       endsWithSep(s));
  2602.   }
  2603.   function endsWithSep(s, pos = s.length - 1) {
  2604.     RX_SEP.lastIndex = pos;
  2605.     return RX_SEP.test(s);
  2606.   }
  2607.   function equals(s) {
  2608.     return s.startsWith(this) && (
  2609.       s.length === this.length ||
  2610.       s.length === this.length + 1 && endsWithSep(s));
  2611.   }
  2612.   function has(s) {
  2613.     return s.includes(this);
  2614.   }
  2615.   function regexp(s) {
  2616.     return s.includes(this[0]) && this[1].test(s);
  2617.   }
  2618.   function starts(s) {
  2619.     return s.startsWith(this);
  2620.   }
  2621.   function startsDomainPrescreen(url) {
  2622.     return url.includes(this[0]) && startsDomain.call(this, url);
  2623.   }
  2624.   function startsDomain(url) {
  2625.     let hostStart = url.indexOf('//');
  2626.     if (hostStart && url[hostStart - 1] !== ':')
  2627.       return;
  2628.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2629.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2630.     const [needle, domain, pinDomainEnd, endSep] = this;
  2631.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2632.     for (; ; start++) {
  2633.       start = host.indexOf(domain, start);
  2634.       if (start < 0)
  2635.         return;
  2636.       if (!start || host[start - 1] === '.')
  2637.         break;
  2638.     }
  2639.     start += hostStart;
  2640.     if (url.lastIndexOf(needle, start) !== start)
  2641.       return;
  2642.     const end = start + needle.length;
  2643.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2644.   }
  2645. })();
  2646.  
  2647. const Util = {
  2648.  
  2649.   addStyle(name, css) {
  2650.     const id = `${PREFIX}style:${name}`;
  2651.     const el = doc.getElementById(id) ||
  2652.                css && $create('style', {id});
  2653.     if (!el) return;
  2654.     if (el.textContent !== css)
  2655.       el.textContent = css;
  2656.     if (el.parentElement !== doc.head)
  2657.       doc.head.appendChild(el);
  2658.     return el;
  2659.   },
  2660.  
  2661.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2662.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2663.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2664.   },
  2665.  
  2666.   decodeHtmlEntities(s) {
  2667.     return s
  2668.       .replace(/&quot;/g, '"')
  2669.       .replace(/&apos;/g, '\'')
  2670.       .replace(/&lt;/g, '<')
  2671.       .replace(/&gt;/g, '>')
  2672.       .replace(/&amp;/g, '&');
  2673.   },
  2674.  
  2675.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2676.   decodeUrl(url) {
  2677.     if (!url || typeof url !== 'string') return url;
  2678.     const iPct = url.indexOf('%');
  2679.     const iColon = url.indexOf(':');
  2680.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2681.       decodeURIComponent(url) :
  2682.       url;
  2683.   },
  2684.  
  2685.   deepEqual(a, b) {
  2686.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2687.       return a === b;
  2688.     if (Array.isArray(a)) {
  2689.       return Array.isArray(b) &&
  2690.         a.length === b.length &&
  2691.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2692.     }
  2693.     const keys = Object.keys(a);
  2694.     return keys.length === Object.keys(b).length &&
  2695.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2696.   },
  2697.  
  2698.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2699.  
  2700.   forceLayout(node) {
  2701.     // eslint-disable-next-line no-unused-expressions
  2702.     node.clientHeight;
  2703.   },
  2704.  
  2705.   formatError(e, rule) {
  2706.     const message =
  2707.       e.message ||
  2708.       e.readyState && 'Request failed.' ||
  2709.       e.type === 'error' && `File can't be displayed.${
  2710.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2711.       }` ||
  2712.       e;
  2713.     const m = [
  2714.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold'],
  2715.       ['', 'font-weight:normal'],
  2716.     ];
  2717.     m.push(...[
  2718.       ['Node: %o', ai.node],
  2719.       ['Rule: %o', rule],
  2720.       ai.url && ['URL: %s', ai.url],
  2721.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2722.     ].filter(Boolean));
  2723.     return {
  2724.       message,
  2725.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2726.       consoleArgs: m.map(([, v]) => v),
  2727.     };
  2728.   },
  2729.  
  2730.   isHovered(el) {
  2731.     // doesn't work in image tabs, browser bug?
  2732.     return App.isImageTab || el.closest(':hover');
  2733.   },
  2734.  
  2735.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2736.  
  2737.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2738.  
  2739.   newFunction(...args) {
  2740.     try {
  2741.       return App.NOP || new Function(...args);
  2742.     } catch (e) {
  2743.       if (!e.message.includes('unsafe-eval'))
  2744.         throw e;
  2745.       App.NOP = () => {};
  2746.       return App.NOP;
  2747.     }
  2748.   },
  2749.  
  2750.   rel2abs(rel, abs = location.href) {
  2751.     try {
  2752.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2753.         new URL(rel, abs).href;
  2754.     } catch (e) {
  2755.       return rel;
  2756.     }
  2757.   },
  2758.  
  2759.   stringify(...args) {
  2760.     const p = Array.prototype;
  2761.     const {toJSON} = p;
  2762.     if (toJSON) p.toJSON = null;
  2763.     const res = JSON.stringify(...args);
  2764.     if (toJSON) p.toJSON = toJSON;
  2765.     return res;
  2766.   },
  2767.  
  2768.   suppressTooltip() {
  2769.     for (const node of [
  2770.       ai.node.parentNode,
  2771.       ai.node,
  2772.       ai.node.firstElementChild,
  2773.     ]) {
  2774.       const t = (node || 0).title;
  2775.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2776.         ai.tooltip = {node, text: t};
  2777.         node.title = '';
  2778.         break;
  2779.       }
  2780.     }
  2781.   },
  2782.  
  2783.   tabFixUrl() {
  2784.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2785.            navigator.userAgent.includes('Gecko/') &&
  2786.            flattenHtml(`data:text/html;charset=utf8,
  2787.       <style>
  2788.         body {
  2789.           margin: 0;
  2790.           padding: 0;
  2791.           background: #222;
  2792.         }
  2793.         .fit {
  2794.           overflow: hidden
  2795.         }
  2796.         .fit > img {
  2797.           max-width: 100vw;
  2798.           max-height: 100vh;
  2799.         }
  2800.         body > img {
  2801.           margin: auto;
  2802.           position: absolute;
  2803.           left: 0;
  2804.           right: 0;
  2805.           top: 0;
  2806.           bottom: 0;
  2807.         }
  2808.       </style>
  2809.       <body class=fit>
  2810.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2811.       </body>
  2812.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2813.   },
  2814. };
  2815.  
  2816. async function setup({rule} = {}) {
  2817.   if (typeof doc.body.attachShadow !== 'function') {
  2818.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2819.           'You can edit the script\'s storage directly in your userscript manager.');
  2820.     return;
  2821.   }
  2822.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2823.   let uiCfg;
  2824.   let root = (elConfig || 0).shadowRoot;
  2825.   let {blankRuleElement} = setup;
  2826.   /** @type NodeList */
  2827.   const UI = new Proxy({}, {
  2828.     get(_, id) {
  2829.       return root.getElementById(id);
  2830.     },
  2831.   });
  2832.   if (!rule || !elConfig)
  2833.     init(await Config.load({save: true}));
  2834.   if (rule)
  2835.     installRule(rule);
  2836.  
  2837.   function init(data) {
  2838.     uiCfg = data;
  2839.     $remove(elConfig);
  2840.     elConfig = $create('div', {contentEditable: true});
  2841.     root = elConfig.attachShadow({mode: 'open'});
  2842.     root.innerHTML = TRUSTED.createHTML(createConfigHtml());
  2843.     initEvents();
  2844.     renderAll();
  2845.     renderCustomScales();
  2846.     renderRules();
  2847.     doc.body.appendChild(elConfig);
  2848.     requestAnimationFrame(() => {
  2849.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2850.     });
  2851.   }
  2852.  
  2853.   function initEvents() {
  2854.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2855.     UI._export.onclick = e => {
  2856.       dropEvent(e);
  2857.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2858.       UI._exportNotification.hidden = false;
  2859.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2860.     };
  2861.     UI._import.onclick = e => {
  2862.       dropEvent(e);
  2863.       const s = prompt('Paste settings:');
  2864.       if (s)
  2865.         init(new Config({data: s}));
  2866.     };
  2867.     UI._install.onclick = setupRuleInstaller;
  2868.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2869.     UI._reveal.onclick = e => {
  2870.       e.preventDefault();
  2871.       cssApp.hidden = !cssApp.hidden;
  2872.       if (!cssApp.hidden) {
  2873.         if (!cssApp.value) {
  2874.           App.updateStyles();
  2875.           cssApp.value = App.globalStyle.trim();
  2876.           cssApp.setSelectionRange(0, 0);
  2877.         }
  2878.         cssApp.focus();
  2879.       }
  2880.     };
  2881.     UI.start.onchange = function () {
  2882.       UI.delay.closest('label').hidden =
  2883.         UI.preload.closest('label').hidden =
  2884.           this.value !== 'auto';
  2885.     };
  2886.     UI.start.onchange();
  2887.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2888.     // color
  2889.     for (const el of $$('[type="color"]', root)) {
  2890.       el.oninput = colorOnInput;
  2891.       el.elSwatch = el.nextElementSibling;
  2892.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2893.       el.elOpacity.elColor = el;
  2894.     }
  2895.     function colorOnInput() {
  2896.       this.elSwatch.style.setProperty('--color',
  2897.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2898.     }
  2899.     // range
  2900.     for (const el of $$('[type="range"]', root)) {
  2901.       el.oninput = rangeOnInput;
  2902.       el.onblur = rangeOnBlur;
  2903.       el.addEventListener('focusin', rangeOnFocus);
  2904.     }
  2905.     function rangeOnBlur(e) {
  2906.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2907.         this.elEdit.onblur(e);
  2908.     }
  2909.     function rangeOnFocus() {
  2910.       if (this.elEdit) return;
  2911.       const {min, max, step, value} = this;
  2912.       this.elEdit = $create('input', {
  2913.         value, min, max, step,
  2914.         className: 'range-edit',
  2915.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2916.         type: 'number',
  2917.         elRange: this,
  2918.         onblur: rangeEditOnBlur,
  2919.         oninput: rangeEditOnInput,
  2920.       });
  2921.       this.insertAdjacentElement('afterend', this.elEdit);
  2922.     }
  2923.     function rangeOnInput() {
  2924.       this.title = (this.dataset.title || '').replace('$', this.value);
  2925.       if (this.elColor) this.elColor.oninput();
  2926.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  2927.     }
  2928.     // range-edit
  2929.     function rangeEditOnBlur(e) {
  2930.       if (e.relatedTarget !== this.elRange) {
  2931.         this.remove();
  2932.         this.elRange.elEdit = null;
  2933.       }
  2934.     }
  2935.     function rangeEditOnInput() {
  2936.       this.elRange.valueAsNumber = this.valueAsNumber;
  2937.       this.elRange.oninput();
  2938.     }
  2939.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2940.     // which may happen since it sees only the outer <div> in the event |target|
  2941.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  2942.   }
  2943.  
  2944.   function closeSetup(event) {
  2945.     const isApply = this.id === '_apply';
  2946.     if (event && (this.id === '_ok' || isApply)) {
  2947.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  2948.       Ruler.init();
  2949.       Menu.reRegisterAlt();
  2950.       if (isApply) {
  2951.         renderCustomScales();
  2952.         UI._css.textContent = cfg._getCss();
  2953.         return;
  2954.       }
  2955.     }
  2956.     $remove(elConfig);
  2957.     elConfig = null;
  2958.   }
  2959.  
  2960.   function collectConfig({save, clone} = {}) {
  2961.     let data = {};
  2962.     for (const el of $$('input[id], select[id]', root))
  2963.       data[el.id] = el.type === 'checkbox' ? el.checked :
  2964.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  2965.           el.value || '';
  2966.     Object.assign(data, {
  2967.       css: UI.css.value.trim(),
  2968.       delay: UI.delay.valueAsNumber * 1000,
  2969.       hosts: collectRules(),
  2970.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  2971.       scales: UI.scales.value
  2972.         .trim()
  2973.         .split(/[,;]*\s+/)
  2974.         .map(x => x.replace(',', '.'))
  2975.         .filter(x => !isNaN(parseFloat(x))),
  2976.     });
  2977.     if (clone)
  2978.       data = JSON.parse(Util.stringify(data));
  2979.     return new Config({data, save});
  2980.   }
  2981.  
  2982.   function collectRules() {
  2983.     return [...UI._rules.children]
  2984.       .map(el => [el.value.trim(), el[RULE]])
  2985.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2986.       .map(([s, json]) => json || s)
  2987.       .filter(Boolean);
  2988.   }
  2989.  
  2990.   function checkRule({target: el}) {
  2991.     let json, error, title;
  2992.     const prev = el.previousElementSibling;
  2993.     if (el.value) {
  2994.       json = Ruler.parse(el.value);
  2995.       error = json instanceof Error && (json.message || String(json));
  2996.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  2997.         !/^[-.a-z0-9]*$/i.test(json.d);
  2998.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  2999.         .filter(Boolean).join('\n');
  3000.       el.classList.toggle('invalid-domain', invalidDomain);
  3001.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3002.       if (!prev)
  3003.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3004.     } else if (prev) {
  3005.       prev.focus();
  3006.       el.remove();
  3007.     }
  3008.     el[RULE] = !error && json;
  3009.     el.title = title;
  3010.     el.setCustomValidity(error || '');
  3011.   }
  3012.  
  3013.   async function focusRule({target: el, relatedTarget: from}) {
  3014.     if (el === this)
  3015.       return;
  3016.     await new Promise(setTimeout);
  3017.     if (el[RULE] && el.rows < 2) {
  3018.       let i = el.selectionStart;
  3019.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3020.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3021.       el.setSelectionRange(i, i);
  3022.       el.rows = txt.match(/^/gm).length;
  3023.     }
  3024.     if (!this.contains(from))
  3025.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3026.   }
  3027.  
  3028.   function installRule(rule) {
  3029.     const inputs = UI._rules.children;
  3030.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3031.     if (!el) {
  3032.       el = inputs[0];
  3033.       el[RULE] = rule;
  3034.       el.value = Ruler.format(rule);
  3035.       el.hidden = false;
  3036.       const i = Math.max(0, collectRules().indexOf(rule));
  3037.       inputs[i].insertAdjacentElement('afterend', el);
  3038.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3039.     }
  3040.     const rect = el.getBoundingClientRect();
  3041.     if (rect.bottom < 0 ||
  3042.         rect.bottom > el.parentNode.offsetHeight)
  3043.       el.scrollIntoView();
  3044.     el.classList.add('highlight');
  3045.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3046.     el.focus();
  3047.   }
  3048.  
  3049.   function renderRules() {
  3050.     const rules = UI._rules;
  3051.     rules.addEventListener('input', checkRule);
  3052.     rules.addEventListener('focusin', focusRule);
  3053.     rules.addEventListener('paste', focusRule);
  3054.     blankRuleElement =
  3055.       setup.blankRuleElement =
  3056.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3057.     for (const rule of uiCfg.hosts || []) {
  3058.       const el = blankRuleElement.cloneNode();
  3059.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3060.       rules.appendChild(el);
  3061.       checkRule({target: el});
  3062.     }
  3063.     const search = UI._search;
  3064.     search.oninput = () => {
  3065.       setup.search = search.value;
  3066.       const s = search.value.toLowerCase();
  3067.       for (const el of rules.children)
  3068.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3069.     };
  3070.     search.value = setup.search || '';
  3071.     if (search.value)
  3072.       search.oninput();
  3073.   }
  3074.  
  3075.   function renderCustomScales() {
  3076.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3077.   }
  3078.  
  3079.   function renderAll() {
  3080.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3081.       if (el.id in uiCfg)
  3082.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3083.     for (const el of $$('input[type="range"]', root))
  3084.       el.oninput();
  3085.     for (const el of $$('a[href^="http"]', root))
  3086.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3087.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3088.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3089.   }
  3090. }
  3091.  
  3092. function setupClickedRule(event) {
  3093.   let rule;
  3094.   const el = event.target.closest('blockquote, code, pre');
  3095.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3096.     dropEvent(event);
  3097.     setup({rule});
  3098.   }
  3099. }
  3100.  
  3101. async function setupRuleInstaller(e) {
  3102.   dropEvent(e);
  3103.   const parent = this.parentElement;
  3104.   parent.children._installLoading.hidden = false;
  3105.   this.remove();
  3106.   let rules;
  3107.  
  3108.   try {
  3109.     rules = extractRules(await Remoting.getDoc(this.href));
  3110.     const selector = $create('select', {
  3111.       size: 8,
  3112.       style: 'width: 100%',
  3113.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3114.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3115.     });
  3116.     selector.append(...rules.map(renderRule));
  3117.     selector.selectedIndex = findMatchingRuleIndex();
  3118.     parent.children._installLoading.remove();
  3119.     parent.children._installHint.hidden = false;
  3120.     parent.appendChild(selector);
  3121.     requestAnimationFrame(() => {
  3122.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  3123.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  3124.       selector.focus();
  3125.     });
  3126.   } catch (e) {
  3127.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3128.   }
  3129.  
  3130.   function extractRules({doc}) {
  3131.     // sort by name
  3132.     return [...$$('#wiki-body tr', doc)]
  3133.       .map(tr => [
  3134.         tr.cells[0].textContent.trim(),
  3135.         Ruler.fromElement(tr.cells[1]),
  3136.       ])
  3137.       .filter(([name, r]) =>
  3138.         name && r && (!r.d || hostname.includes(r.d)))
  3139.       .sort(([a], [b]) =>
  3140.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3141.           a > b ? 1 :
  3142.             0);
  3143.   }
  3144.  
  3145.   function findMatchingRuleIndex() {
  3146.     const dottedHost = `.${hostname}.`;
  3147.     let maxCount = 0, maxIndex = 0, index = 0;
  3148.     for (const [name, {d}] of rules) {
  3149.       let count = !!(d && hostname.includes(d)) * 10;
  3150.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3151.         count += dottedHost.includes(`.${part}.`) && part.length;
  3152.       if (count > maxCount) {
  3153.         maxCount = count;
  3154.         maxIndex = index;
  3155.       }
  3156.       index++;
  3157.     }
  3158.     return maxIndex;
  3159.   }
  3160.  
  3161.   function renderRule([name, rule]) {
  3162.     return $create('option', {
  3163.       textContent: name,
  3164.       title: Ruler.format(rule, {expand: true})
  3165.         .replace(/^{|\s*}$/g, '')
  3166.         .split('\n')
  3167.         .slice(0, 12)
  3168.         .map(renderTitleLine)
  3169.         .filter(Boolean)
  3170.         .join('\n'),
  3171.     });
  3172.   }
  3173.  
  3174.   function renderTitleLine(line, i, arr) {
  3175.     return (
  3176.       // show ... on 10th line if there are more lines
  3177.       i === 9 && arr.length > 10 ? '...' :
  3178.         i > 10 ? '' :
  3179.           // truncate to 100 chars
  3180.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3181.             // strip the leading space
  3182.             .replace(/^\s/, ''));
  3183.   }
  3184.  
  3185.   function maybeSetup(e) {
  3186.     if (!eventModifiers(e))
  3187.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3188.   }
  3189. }
  3190.  
  3191. function createConfigHtml() {
  3192.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3193.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3194.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  3195.   return flattenHtml(`
  3196. <style>
  3197.   :host {
  3198.     all: initial !important;
  3199.     position: fixed !important;
  3200.     z-index: 2147483647 !important;
  3201.     top: 20px !important;
  3202.     right: 20px !important;
  3203.     padding: 1.5em !important;
  3204.     color: #000 !important;
  3205.     background: #eee !important;
  3206.     box-shadow: 5px 5px 25px 2px #000 !important;
  3207.     width: 33em !important;
  3208.     border: 1px solid black !important;
  3209.     display: flex !important;
  3210.     flex-direction: column !important;
  3211.   }
  3212.   main {
  3213.     font: 12px/15px sans-serif;
  3214.   }
  3215.   table {
  3216.     text-align:left;
  3217.   }
  3218.   ul {
  3219.     max-height: calc(100vh - 200px);
  3220.     margin: 0 0 15px 0;
  3221.     padding: 0;
  3222.     list-style: none;
  3223.   }
  3224.   li {
  3225.     margin: 0;
  3226.     padding: .25em 0;
  3227.   }
  3228.   li.options {
  3229.     display: flex;
  3230.     align-items: center;
  3231.     justify-content: space-between;
  3232.   }
  3233.   li.row {
  3234.     align-items: start;
  3235.     flex-wrap: wrap;
  3236.   }
  3237.   li.row label {
  3238.     display: flex;
  3239.     flex-direction: row;
  3240.     align-items: center;
  3241.   }
  3242.   li.row input {
  3243.     margin-right: .25em;
  3244.   }
  3245.   li.stretch label {
  3246.     flex: 1;
  3247.     white-space: nowrap;
  3248.   }
  3249.   li.stretch label > span {
  3250.     display: flex;
  3251.     flex-direction: row;
  3252.     flex: 1;
  3253.   }
  3254.   label {
  3255.     display: inline-flex;
  3256.     flex-direction: column;
  3257.   }
  3258.   label:not(:last-child) {
  3259.     margin-right: 1em;
  3260.   }
  3261.   input, select {
  3262.     min-height: 1.3em;
  3263.     box-sizing: border-box;
  3264.   }
  3265.   input[type=checkbox] {
  3266.     margin-left: 0;
  3267.   }
  3268.   input[type=number] {
  3269.     width: 4em;
  3270.   }
  3271.   input:not([type=checkbox])  {
  3272.     padding: 0 .25em;
  3273.   }
  3274.   input[type=range] {
  3275.     flex: 1;
  3276.     width: 100%;
  3277.     margin: 0 .25em;
  3278.     padding: 0;
  3279.     filter: saturate(0);
  3280.     opacity: .5;
  3281.   }
  3282.   u + input[type=range] {
  3283.     max-width: 3em;
  3284.   }
  3285.   input[type=range]:hover {
  3286.     filter: none;
  3287.     opacity: 1;
  3288.   }
  3289.   input[type=color] {
  3290.     position: absolute;
  3291.     width: calc(1.5em + 2px);
  3292.     opacity: 0;
  3293.     cursor: pointer;
  3294.   }
  3295.   u {
  3296.     position: relative;
  3297.     flex: 0 0 1.5em;
  3298.     height: 1.5em;
  3299.     border: 1px solid #888;
  3300.     pointer-events: none;
  3301.     color: #888;
  3302.     background-image:
  3303.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3304.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3305.     background-size: .5em .5em;
  3306.     background-position: 0 0, .25em .25em;
  3307.   }
  3308.   u::after {
  3309.     position: absolute;
  3310.     top: 0;
  3311.     left: 0;
  3312.     right: 0;
  3313.     bottom: 0;
  3314.     content: "";
  3315.     background-color: var(--color);
  3316.   }
  3317.   .range-edit {
  3318.     position: absolute;
  3319.     box-shadow: 0 0.25em 1em #000;
  3320.     z-index: 99;
  3321.   }
  3322.   textarea {
  3323.     resize: vertical;
  3324.     margin: 1px 0;
  3325.     font: 11px/1.25 Consolas, monospace;
  3326.   }
  3327.   :invalid {
  3328.     background-color: #f002;
  3329.     border-color: #800;
  3330.   }
  3331.   code {
  3332.     font-weight: bold;
  3333.   }
  3334.   a {
  3335.     text-decoration: none;
  3336.     color: LinkText;
  3337.   }
  3338.   a:hover {
  3339.     text-decoration: underline;
  3340.   }
  3341.   button {
  3342.     padding: .2em 1em;
  3343.     margin: 0 1em;
  3344.   }
  3345.   kbd {
  3346.     padding: 1px 6px;
  3347.     font-weight: bold;
  3348.     font-family: Consolas, monospace;
  3349.     border: 1px solid #888;
  3350.     border-radius: 3px;
  3351.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3352.   }
  3353.   .column {
  3354.     display: flex;
  3355.     flex-direction: column;
  3356.   }
  3357.   .highlight {
  3358.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3359.     animation-fill-mode: both;
  3360.   }
  3361.   #_rules > * {
  3362.     word-break: break-all;
  3363.   }
  3364.   #_rules > :not(:focus) {
  3365.     overflow: hidden; /* prevents wrapping in FF */
  3366.   }
  3367.   .invalid-domain {
  3368.     opacity: .5;
  3369.   }
  3370.   .matching-domain {
  3371.     border-color: #56b8ff;
  3372.     background: #d7eaff;
  3373.   }
  3374.   #_x {
  3375.     position: absolute;
  3376.     top: 0;
  3377.     right: 0;
  3378.     padding: 4px 8px;
  3379.     cursor: pointer;
  3380.     user-select: none;
  3381.   }
  3382.   #_x:hover {
  3383.     background-color: #8884;
  3384.   }
  3385.   #_cssApp {
  3386.     color: seagreen;
  3387.   }
  3388.   #_exportNotification {
  3389.     color: green;
  3390.     font-weight: bold;
  3391.     position: absolute;
  3392.     left: 0;
  3393.     right: 0;
  3394.     bottom: 2px;
  3395.   }
  3396.   #_installHint {
  3397.     color: green;
  3398.   }
  3399.   @keyframes fade-in {
  3400.     from { background-color: deepskyblue }
  3401.     to {}
  3402.   }
  3403.   @media (prefers-color-scheme: dark) {
  3404.     :host {
  3405.       color: #aaa !important;
  3406.       background: #333 !important;
  3407.     }
  3408.     a {
  3409.       color: deepskyblue;
  3410.     }
  3411.     button {
  3412.       background: linear-gradient(-5deg, #333, #555);
  3413.       border: 1px solid #000;
  3414.       box-shadow: 0 2px 6px #181818;
  3415.       border-radius: 3px;
  3416.       cursor: pointer;
  3417.     }
  3418.     button:hover {
  3419.       background: linear-gradient(-5deg, #333, #666);
  3420.     }
  3421.     textarea, input, select {
  3422.       background: #111;
  3423.       color: #BBB;
  3424.       border: 1px solid #555;
  3425.     }
  3426.     input[type=checkbox] {
  3427.       filter: invert(1);
  3428.     }
  3429.     input[type=range] {
  3430.       filter: invert(1) saturate(0);
  3431.     }
  3432.     input[type=range]:hover {
  3433.       filter: invert(1);
  3434.     }
  3435.     kbd {
  3436.       border-color: #666;
  3437.     }
  3438.     @supports (-moz-appearance: none) {
  3439.       input[type=checkbox],
  3440.       input[type=range],
  3441.       input[type=range]:hover {
  3442.         filter: none;
  3443.       }
  3444.     }
  3445.     .range-edit {
  3446.       box-shadow: 0 .5em 1em .5em #000;
  3447.     }
  3448.     .matching-domain {
  3449.       border-color: #0065af;
  3450.       background: #032b58;
  3451.       color: #ddd;
  3452.     }
  3453.     #_cssApp {
  3454.       color: darkseagreen;
  3455.     }
  3456.     #_installHint {
  3457.       color: greenyellow;
  3458.     }
  3459.     ::-webkit-scrollbar {
  3460.       width: 14px;
  3461.       height: 14px;
  3462.       background: #333;
  3463.     }
  3464.     ::-webkit-scrollbar-button:single-button {
  3465.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3466.     }
  3467.     ::-webkit-scrollbar-track-piece {
  3468.       background: #444;
  3469.       border: 4px solid #333;
  3470.       border-radius: 8px;
  3471.     }
  3472.     ::-webkit-scrollbar-thumb {
  3473.       border: 3px solid #333;
  3474.       border-radius: 8px;
  3475.       background: #666;
  3476.     }
  3477.     ::-webkit-resizer {
  3478.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3479.       border: 2px solid transparent;
  3480.     }
  3481.   }
  3482. </style>
  3483. <style id="_css">${cfg._getCss()}</style>
  3484. <main id="${PREFIX}setup">
  3485.   <div id=_x>x</div>
  3486.   <ul class=column>
  3487.     <details style="margin: -1em 0 0">
  3488.       <summary style="cursor:pointer; color:LinkText"><b>Click to view help & hotkeys</b></summary>
  3489.       <table>
  3490.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3491.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3492.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3493.         <tr><th>Force-activate<br>(for small pics)</th>
  3494.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3495.         <tr><td>&nbsp;</td></tr>
  3496.         <tr><th>Start zooming</th>
  3497.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3498.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3499.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3500.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3501.         <tr><th>Previous/next<br>in album</th>
  3502.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3503.         <tr><td>&nbsp;</td></tr>
  3504.       </table>
  3505.       <table>
  3506.         <tr><th>Antialiasing on/off</th><td><kbd>a</kbd></td><td rowspan=4>key while popup is visible</td></tr>
  3507.         <tr><th>Download</th><td><kbd>d</kbd></td></tr>
  3508.         <tr><th>Mute/unmute</th><td><kbd>m</kbd></td></tr>
  3509.         <tr><th>Open in tab</th><td><kbd>t</kbd></td></tr>
  3510.       </table>
  3511.     </details>
  3512.     <li class="options stretch">
  3513.       <label>Popup shows on
  3514.         <select id=start>
  3515.           <option value=context>Right-click / &#8801; / Ctrl
  3516.           <option value=contextMK>Right-click / &#8801;
  3517.           <option value=contextM>Right-click
  3518.           <option value=contextK title="&#8801; is the Menu key (near the right Ctrl)">&#8801; key
  3519.           <option value=ctrl>Ctrl
  3520.           <option value=auto>automatically
  3521.         </select>
  3522.       </label>
  3523.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3524.       <label title="(if the full version of the hovered image is ...% larger)">
  3525.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3526.       </label>
  3527.       <label>Zoom activates on
  3528.         <select id=zoom>
  3529.           <option value=context>Right click / Shift
  3530.           <option value=wheel>Wheel up / Shift
  3531.           <option value=shift>Shift
  3532.           <option value=auto>automatically
  3533.         </select>
  3534.       </label>
  3535.       <label>...and zooms to
  3536.         <select id=fit>
  3537.           <option value=all>fit to window
  3538.           <option value=large>fit if larger
  3539.           <option value=no>100%
  3540.           <option value="" title="Use custom scale factors">custom
  3541.         </select>
  3542.       </label>
  3543.     </li>
  3544.     <li class=options>
  3545.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3546.       </label>
  3547.       <label>When fully zoomed out:
  3548.         <select id=zoomOut>
  3549.           <option value=stay>stay in zoom mode
  3550.           <option value=auto>stay if still hovered
  3551.           <option value=unzoom>undo zoom mode
  3552.           <option value=close>close popup
  3553.         </select>
  3554.       </label>
  3555.       <label style="flex: 1" title="${trimLeft(`
  3556.         Scale factors to use when “zooms to” selector is set to “custom”.
  3557.         0 = fit to window,
  3558.         0! = same as 0 but also removes smaller values,
  3559.         * after a value marks the default zoom factor, for example: 1*
  3560.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3561.         ${scalesHint}
  3562.       `)}">Custom scale factors:
  3563.         <input id=scales placeholder="${scalesHint}">
  3564.       </label>
  3565.     </li>
  3566.     <li class="options row">
  3567.       <div>
  3568.         <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3569.           <input type=checkbox id=center>Centered*</label>
  3570.         <label title="Provides smoother experience but increases network traffic">
  3571.           <input type=checkbox id=preload>Preload on hover*</label>
  3572.         <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3573.       </div>
  3574.       <div>
  3575.         <label><input type=checkbox id=mute>Mute videos</label>
  3576.         <label title="Disable only if you spoof the HTTP headers yourself">
  3577.           <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3578.         <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3579.           <input type=checkbox id=globalStatus>Set status on &lt;html&gt;*</label>
  3580.       </div>
  3581.       <div>
  3582.         <label title="...or show a partial image while still loading">
  3583.           <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3584.         <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3585.         <label><input type=checkbox id=uiFadeinGallery>Fade-in transition in gallery</label>
  3586.       </div>
  3587.       <label><input type=checkbox id=startAltShown>
  3588.         Show a switch for 'auto-start' mode in userscript manager menu</label>
  3589.     </li>
  3590.     <li class="options stretch">
  3591.       <label>Background
  3592.         <span>
  3593.           <input id=uiBackgroundColor type=color><u></u>
  3594.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3595.         </span>
  3596.       </label>
  3597.       <label>Border color, opacity, size
  3598.         <span>
  3599.           <input id=uiBorderColor type=color><u></u>
  3600.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3601.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3602.         </span>
  3603.       </label>
  3604.       <label>Shadow color, opacity, size
  3605.         <span>
  3606.           <input id=uiShadowColor type=color><u></u>
  3607.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3608.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3609.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3610.         </span>
  3611.       </label>
  3612.       <label>Padding
  3613.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3614.       </label>
  3615.       <label>Margin
  3616.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3617.       </label>
  3618.     </li>
  3619.     <li>
  3620.       <a href="${MPIV_BASE_URL}Custom-CSS" target="_blank">Custom CSS:</a>&nbsp;
  3621.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3622.       <a tabindex=0 id=_reveal style="float: right"
  3623.          title="You can copy parts of it to override them in your custom CSS">
  3624.          View the built-in CSS</a>
  3625.       <div class=column>
  3626.         <textarea id=css spellcheck=false></textarea>
  3627.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3628.       </div>
  3629.     </li>
  3630.     <li style="display: flex; justify-content: space-between;">
  3631.       <div><a href="${MPIV_BASE_URL}Custom-host-rules" target="_blank">Custom host rules:</a></div>
  3632.       <div style="white-space: nowrap">
  3633.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3634.         in "d" value, for example <code>"d": "!foo.com"</code>
  3635.       </div>
  3636.       <div>
  3637.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3638.       </div>
  3639.     </li>
  3640.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3641.       <div id=_rules class=column>
  3642.         <textarea rows=1 spellcheck=false></textarea>
  3643.       </div>
  3644.     </li>
  3645.     <li>
  3646.       <div hidden id=_installLoading>Loading...</div>
  3647.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3648.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3649.       <a href="${MPIV_BASE_URL}Rules" id=_install target="_blank">Install rule from repository...</a>
  3650.     </li>
  3651.   </ul>
  3652.   <div style="text-align:center">
  3653.     <button id=_ok accesskey=s>OK</button>
  3654.     <button id=_apply accesskey=a>Apply</button>
  3655.     <button id=_import style="margin-right: 0">Import</button>
  3656.     <button id=_export style="margin-left: 0">Export</button>
  3657.     <button id=_cancel>Cancel</button>
  3658.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3659.   </div>
  3660. </main>`);
  3661. }
  3662.  
  3663. function createGlobalStyle() {
  3664.   App.globalStyle = /*language=CSS*/ (String.raw`
  3665. #\mpiv-bar {
  3666.   position: fixed;
  3667.   z-index: 2147483647;
  3668.   top: 0;
  3669.   left: 0;
  3670.   right: 0;
  3671.   opacity: 0;
  3672.   transition: opacity 1s ease .25s;
  3673.   text-align: center;
  3674.   font-family: sans-serif;
  3675.   font-size: 15px;
  3676.   font-weight: bold;
  3677.   background: #0005;
  3678.   color: white;
  3679.   padding: 4px 10px;
  3680.   text-shadow: .5px .5px 2px #000;
  3681. }
  3682. #\mpiv-bar.\mpiv-show,
  3683. #\mpiv-bar[data-force] {
  3684.   opacity: 1;
  3685. }
  3686. #\mpiv-bar[data-zoom]::after {
  3687.   content: " (" attr(data-zoom) ")";
  3688.   opacity: .8;
  3689. }
  3690. #\mpiv-popup.\mpiv-show {
  3691.   display: inline;
  3692. }
  3693. #\mpiv-popup {
  3694.   display: none;
  3695.   cursor: none;
  3696. ${cfg.uiFadein ? String.raw`
  3697.   animation: .2s \mpiv-fadein both;
  3698.   transition: box-shadow .25s, background-color .25s;
  3699.   ` : ''}
  3700. ${App.popupStyleBase = `
  3701.   border: none;
  3702.   box-sizing: border-box;
  3703.   position: fixed;
  3704.   z-index: 2147483647;
  3705.   padding: 0;
  3706.   margin: 0;
  3707.   top: 0;
  3708.   left: 0;
  3709.   width: auto;
  3710.   height: auto;
  3711.   transform-origin: center;
  3712.   max-width: none;
  3713.   max-height: none;
  3714. `}
  3715. }
  3716. #\mpiv-popup.\mpiv-show {
  3717.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3718.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3719.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3720.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3721. }
  3722. #\mpiv-popup.\mpiv-show[loaded] {
  3723.   background-color: ${Util.color('Background')};
  3724.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3725. }
  3726. #\mpiv-popup[data-gallery-flip] {
  3727.   animation: none;
  3728.   transition: none;
  3729. }
  3730. #\mpiv-popup[data-no-aa],
  3731. #\mpiv-popup.\mpiv-zoom-max {
  3732.   image-rendering: pixelated;
  3733. }
  3734. #\mpiv-setup {
  3735. }
  3736. @keyframes \mpiv-fadein {
  3737.   from {
  3738.     opacity: 0;
  3739.     border-color: transparent;
  3740.   }
  3741.   to {
  3742.     opacity: 1;
  3743.   }
  3744. }
  3745. ` + (cfg.globalStatus ? String.raw`
  3746. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3747.   cursor: progress !important;
  3748. }
  3749. :root.\mpiv-edge #\mpiv-popup {
  3750.   cursor: default;
  3751. }
  3752. :root.\mpiv-error *:hover {
  3753.   cursor: not-allowed !important;
  3754. }
  3755. :root.\mpiv-ready *:hover,
  3756. :root.\mpiv-large *:hover {
  3757.   cursor: zoom-in !important;
  3758. }
  3759. :root.\mpiv-shift *:hover {
  3760.   cursor: default !important;
  3761. }
  3762. ` : String.raw`
  3763. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3764.   cursor: progress;
  3765. }
  3766. [\mpiv-status~="edge"]:hover {
  3767.   cursor: default;
  3768. }
  3769. [\mpiv-status~="error"]:hover {
  3770.   cursor: not-allowed;
  3771. }
  3772. [\mpiv-status~="ready"]:hover,
  3773. [\mpiv-status~="large"]:hover {
  3774.   cursor: zoom-in;
  3775. }
  3776. [\mpiv-status~="shift"]:hover {
  3777.   cursor: default;
  3778. }
  3779. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3780.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3781.   return App.globalStyle;
  3782. }
  3783.  
  3784. //#region Global utilities
  3785.  
  3786. const clamp = (v, min, max) =>
  3787.   v < min ? min : v > max ? max : v;
  3788.  
  3789. const compareNumbers = (a, b) =>
  3790.   a - b;
  3791.  
  3792. const flattenHtml = str =>
  3793.   str.trim().replace(/\n\s*/g, '');
  3794.  
  3795. const dropEvent = e =>
  3796.   (e.preventDefault(), e.stopPropagation());
  3797.  
  3798. const ensureArray = v =>
  3799.   Array.isArray(v) ? v : [v];
  3800.  
  3801. /** @param {KeyboardEvent} e */
  3802. const eventModifiers = e =>
  3803.   (e.altKey ? '!' : '') +
  3804.   (e.ctrlKey ? '^' : '') +
  3805.   (e.metaKey ? '#' : '') +
  3806.   (e.shiftKey ? '+' : '');
  3807.  
  3808. const now = performance.now.bind(performance);
  3809.  
  3810. const sumProps = (...props) => {
  3811.   let sum = 0;
  3812.   for (const p of props)
  3813.     sum += parseFloat(p) || 0;
  3814.   return sum;
  3815. };
  3816.  
  3817. const tryCatch = function (fn, ...args) {
  3818.   try {
  3819.     return fn.apply(this, args);
  3820.   } catch (e) {}
  3821. };
  3822.  
  3823. const $ = (sel, node = doc) =>
  3824.   node.querySelector(sel) || false;
  3825.  
  3826. const $$ = (sel, node = doc) =>
  3827.   node.querySelectorAll(sel);
  3828.  
  3829. const $create = (tag, props) =>
  3830.   Object.assign(doc.createElement(tag), props);
  3831.  
  3832. const $css = (el, props) =>
  3833.   Object.entries(props).forEach(([k, v]) =>
  3834.     el.style.setProperty(k, v, 'important'));
  3835.  
  3836. const $parseHtml = str =>
  3837.   new DOMParser().parseFromString(str, 'text/html');
  3838.  
  3839. const $many = (q, doc) => {
  3840.   for (const selector of ensureArray(q)) {
  3841.     const el = selector && $(selector, doc);
  3842.     if (el)
  3843.       return el;
  3844.   }
  3845. };
  3846.  
  3847. const $prop = (sel, prop, node = doc) =>
  3848.   (node = $(sel, node)) && node[prop] || '';
  3849.  
  3850. const $propUp = (node, prop) =>
  3851.   (node = node.closest(`[${prop}]`)) &&
  3852.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3853.   '';
  3854.  
  3855. const $remove = node =>
  3856.   node && node.remove();
  3857.  
  3858. //#endregion
  3859. //#region Init
  3860.  
  3861. Config.load({save: true}).then(res => {
  3862.   cfg = res;
  3863.   if (Menu) Menu.register();
  3864.  
  3865.   if (doc.body) App.checkImageTab();
  3866.   else addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3867.  
  3868.   addEventListener('mouseover', Events.onMouseOver, true);
  3869.   addEventListener('contextmenu', Events.onContext, true);
  3870.   addEventListener('keydown', Events.onKeyDown, true);
  3871.   if (['greasyfork.org', 'github.com'].includes(hostname))
  3872.     addEventListener('click', setupClickedRule, true);
  3873.   addEventListener('message', App.onMessage, true);
  3874. });
  3875.  
  3876. //#endregion