☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2020-02-11 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     http*
  7. // @connect     *
  8.  
  9. // allow rule installer in config dialog https://w9p.co/userscripts/mpiv/more_host_rules.html
  10. // @connect     w9p.co
  11.  
  12. // @grant       GM_getValue
  13. // @grant       GM_setValue
  14. // @grant       GM_xmlhttpRequest
  15. // @grant       GM_openInTab
  16. // @grant       GM_registerMenuCommand
  17.  
  18. // @version     1.0.17
  19. // @author      tophf
  20.  
  21. // @original-version 2017.9.29
  22. // @original-author  kuehlschrank
  23.  
  24. // @supportURL  https://github.com/tophf/mpiv/issues
  25. // @homepage    https://w9p.co/userscripts/mpiv/
  26. // @icon        https://w9p.co/userscripts/mpiv/icon.png
  27. // ==/UserScript==
  28.  
  29. 'use strict';
  30.  
  31. const doc = document;
  32. const hostname = location.hostname;
  33. const dotDomain = '.' + hostname;
  34. const trustedDomains = ['greasyfork.org', 'w9p.co'];
  35. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  36. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  37.  
  38. const POSTMSG_PREFIX = GM_info.script.name + ':';
  39. const PREFIX = 'mpiv-';
  40. const STATUS_ATTR = `${PREFIX}status`;
  41. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  42. const PASSIVE = {passive: true};
  43. // time for volatile things to settle down meanwhile we postpone action
  44. // examples: loading image from cache, quickly moving mouse over one element to another
  45. const SETTLE_TIME = 50;
  46. // used to detect JS code in host rules
  47. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  48.  
  49. /** @type mpiv.Config */
  50. let cfg;
  51. /** @type mpiv.AppInfo */
  52. let ai = {rule: {}};
  53.  
  54. const clamp = (v, min, max) => v < min ? min : v > max ? max : v;
  55. const ensureArray = v => Array.isArray(v) ? v : [v];
  56. const safeIncludes = (a, b) => typeof a === 'string' && a.includes(b);
  57. const sumProps = (...props) => props.reduce((sum, v) => sum + (parseFloat(v) || 0), 0);
  58. const tryCatch = function (fn, ...args) {
  59.   try {
  60.     return fn.apply(this, args);
  61.   } catch (e) {}
  62. };
  63. const $ = (s, n = doc) => n.querySelector(s) || 0;
  64. const $$ = (s, n = doc) => n.querySelectorAll(s);
  65. const $create = (tag, props) => Object.assign(document.createElement(tag), props);
  66. const $many = (q, doc) => q && ensureArray(q).reduce((el, sel) => el || $(sel, doc), null);
  67. const $prop = (s, prop, n = doc) => (n.querySelector(s) || 0)[prop] || '';
  68. const dropEvent = e => (e.preventDefault(), e.stopPropagation());
  69.  
  70. class App {
  71.  
  72.   static init() {
  73.     /** @type mpiv.Config */
  74.     Config.DEFAULTS = Object.assign(Object.create(null), {
  75.       center: false,
  76.       css: '',
  77.       delay: 500,
  78.       globalStatus: false,
  79.       // prefer ' inside rules because " will be displayed as \"
  80.       // example: "img[src*='icon']"
  81.       hosts: [{
  82.         name: 'No popup for YouTube thumbnails',
  83.         d: 'www.youtube.com',
  84.         e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  85.         s: '',
  86.       }, {
  87.         name: 'No popup for SVG/PNG icons',
  88.         d: '',
  89.         e: "img[src*='icon']",
  90.         r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  91.         s: '',
  92.       }],
  93.       imgtab: false,
  94.       preload: false,
  95.       scale: 1.25,
  96.       scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 5, 8, 16],
  97.       start: 'auto',
  98.       version: 6,
  99.       xhr: true,
  100.       zoom: 'context',
  101.       zoomOut: 'auto',
  102.     });
  103.     cfg = new Config({save: true});
  104.     App.isImageTab = doc.images.length === 1 &&
  105.                      doc.images[0].parentNode === doc.body &&
  106.                      !doc.links.length;
  107.     App.enabled = cfg.imgtab || !App.isImageTab;
  108.  
  109.     GM_registerMenuCommand('MPIV: configure', setup);
  110.     doc.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  111.  
  112.     if (isGoogleDomain && doc.getElementById('main'))
  113.       doc.getElementById('main').addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  114.  
  115.     if (trustedDomains.includes(hostname)) {
  116.       doc.addEventListener('click', e => {
  117.         const el = e.target.closest('blockquote, code, pre');
  118.         const text = el && el.textContent.trim();
  119.         let rule;
  120.         if (text && e.button === 0 &&
  121.             /^\s*{\s*"\w+"\s*:[\s\S]+}\s*$/.test(text) &&
  122.             (rule = tryCatch(JSON.parse, text))) {
  123.           setup({rule});
  124.           dropEvent(e);
  125.         }
  126.       });
  127.     }
  128.  
  129.     window.addEventListener('message', App.onMessageParent);
  130.   }
  131.  
  132.   /** @param {MessageEvent} e */
  133.   static onMessageParent(e) {
  134.     if (typeof e.data === 'string' && e.data.startsWith(POSTMSG_PREFIX)) {
  135.       for (const el of $$('iframe, frame')) {
  136.         if (el.contentWindow === e.source) {
  137.           const r = el.getBoundingClientRect();
  138.           const w = clamp(r.width, 0, innerWidth - r.left);
  139.           const h = clamp(r.height, 0, innerHeight - r.top);
  140.           e.source.postMessage(`${POSTMSG_PREFIX}${w}:${h}`, '*');
  141.         }
  142.       }
  143.     }
  144.   }
  145.  
  146.   /** @param {MessageEvent} e */
  147.   static onMessageChild(e) {
  148.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(POSTMSG_PREFIX)) {
  149.       const [width, height] = e.data.slice(POSTMSG_PREFIX.length).split(':').map(parseFloat);
  150.       if (width && height) {
  151.         ai.view = {width, height};
  152.         window.removeEventListener('message', App.onMessageChild);
  153.       }
  154.     }
  155.   }
  156.  
  157.   static activate(info, event) {
  158.     const force = event.ctrlKey;
  159.     if (!force) {
  160.       const scale = Util.findScale(info.url, info.node.parentNode);
  161.       if (scale && scale < cfg.scale)
  162.         return;
  163.     }
  164.     if (ai.node)
  165.       App.deactivate();
  166.     ai = info;
  167.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  168.     ai.view = {
  169.       width: view.clientWidth,
  170.       height: view.clientHeight,
  171.     };
  172.     if (window !== top) {
  173.       window.addEventListener('message', App.onMessageChild);
  174.       parent.postMessage(POSTMSG_PREFIX + 'getDimensions', '*');
  175.     }
  176.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  177.     Util.suppressHoverTooltip();
  178.     App.setListeners();
  179.     App.updateMouse(event);
  180.     if (force) {
  181.       Popup.start();
  182.     } else if (cfg.start === 'auto' && !ai.rule.manual) {
  183.       Popup.schedule();
  184.     } else {
  185.       App.setStatus('ready');
  186.     }
  187.   }
  188.  
  189.   static checkProgress({start} = {}) {
  190.     const p = ai.popup;
  191.     if (p) {
  192.       ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && 800;
  193.       ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && 1200;
  194.       if (ai.nheight)
  195.         return App.updateProgress();
  196.     }
  197.     if (start)
  198.       ai.timerProgress = setInterval(App.checkProgress, 150);
  199.   }
  200.  
  201.   static deactivate({wait} = {}) {
  202.     App.stopTimers();
  203.     if (ai.req)
  204.       tryCatch.call(ai.req, ai.req.abort);
  205.     if (ai.tooltip)
  206.       ai.tooltip.node.title = ai.tooltip.text;
  207.     App.setStatus(false);
  208.     App.setBar(false);
  209.     App.setListeners(false);
  210.     Popup.destroy();
  211.     if (wait) {
  212.       App.enabled = false;
  213.       setTimeout(App.enable, 200);
  214.     }
  215.     ai = {rule: {}};
  216.   }
  217.  
  218.   static enable() {
  219.     App.enabled = true;
  220.   }
  221.  
  222.   static handleError(e, rule = ai.rule) {
  223.     const fe = Util.formatError(e, rule);
  224.     if (!rule || !ai.urls || !ai.urls.length)
  225.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  226.     if (cfg.xhr && !ai.xhr && isGoogleImages) {
  227.       ai.xhr = true;
  228.       Popup.startSingle();
  229.     } else if (ai.urls && ai.urls.length) {
  230.       ai.url = ai.urls.shift();
  231.       if (ai.url) {
  232.         App.stopTimers();
  233.         Popup.startSingle();
  234.       } else {
  235.         App.deactivate();
  236.       }
  237.     } else if (ai.node) {
  238.       App.setStatus('error');
  239.       App.setBar(fe.message, 'error');
  240.     }
  241.   }
  242.  
  243.   static setBar(label, className) {
  244.     let b = ai.bar;
  245.     if (typeof label !== 'string') {
  246.       b && b.remove();
  247.       ai.bar = null;
  248.       return;
  249.     }
  250.     if (!b)
  251.       b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  252.     App.updateStyles();
  253.     App.updateTitle();
  254.     App.updateBar();
  255.     b.innerHTML = label;
  256.     if (!b.parentNode) {
  257.       doc.body.appendChild(b);
  258.       Util.forceLayout(b);
  259.     }
  260.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  261.   }
  262.  
  263.   static setListeners(enable = true) {
  264.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  265.     const passive = enable ? PASSIVE : undefined;
  266.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  267.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  268.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  269.     onOff.call(doc, 'contextmenu', Events.onContext);
  270.     onOff.call(doc, 'keydown', Events.onKeyDown);
  271.     onOff.call(doc, 'keyup', Events.onKeyUp);
  272.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  273.   }
  274.  
  275.   static setStatus(status) {
  276.     if (!status && !cfg.globalStatus)
  277.       return ai.node && ai.node.removeAttribute(STATUS_ATTR);
  278.     const prefix = cfg.globalStatus ? PREFIX : '';
  279.     const action = status && /^[+-]/.test(status) && status[0];
  280.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  281.     const el = cfg.globalStatus ? doc.documentElement :
  282.       name === 'edge' ? ai.popup :
  283.         ai.node;
  284.     if (!el)
  285.       return;
  286.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  287.     const oldValue = (el.getAttribute(attr) || '').trim();
  288.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  289.     switch (action) {
  290.       case '-':
  291.         cls.delete(name);
  292.         break;
  293.       case false:
  294.         for (const c of cls)
  295.           if (c.startsWith(prefix) && c !== name)
  296.             cls.delete(c);
  297.         // fallthrough to +
  298.       case '+':
  299.         if (name)
  300.           cls.add(name);
  301.         break;
  302.     }
  303.     const newValue = [...cls].join(' ');
  304.     if (newValue !== oldValue)
  305.       el.setAttribute(attr, newValue);
  306.   }
  307.  
  308.   static setStatusLoading(force) {
  309.     if (!force) {
  310.       clearTimeout(ai.timerStatus);
  311.       ai.timerStatus = setTimeout(App.setStatusLoading, SETTLE_TIME, true);
  312.     } else if (!ai.popupLoaded) {
  313.       App.setStatus('+loading');
  314.     }
  315.   }
  316.  
  317.   static stopTimers() {
  318.     clearTimeout(ai.timer);
  319.     clearTimeout(ai.timerStatus);
  320.     clearInterval(ai.timerProgress);
  321.   }
  322.  
  323.   static toggleZoom() {
  324.     const p = ai.popup;
  325.     if (!p || !ai.scales || ai.scales.length < 2)
  326.       return;
  327.     ai.zoom = !ai.zoom;
  328.     ai.zoomed = true;
  329.     const z = ai.scales.indexOf(ai.zscale);
  330.     ai.scale = ai.scales[ai.zoom ? (z > 0 ? z : 1) : 0];
  331.     if (ai.zooming)
  332.       p.classList.add(`${PREFIX}zooming`);
  333.     Popup.move();
  334.     App.updateTitle();
  335.     App.setStatus(ai.zoom ? 'zoom' : false);
  336.     if (!ai.zoom)
  337.       App.updateFileInfo();
  338.     return ai.zoom;
  339.   }
  340.  
  341.   static updateBar() {
  342.     if (ai.timerBar)
  343.       return;
  344.     clearTimeout(ai.timerBar);
  345.     ai.bar.style.removeProperty('opacity');
  346.     ai.timerBar = setTimeout(() => {
  347.       ai.timerBar = 0;
  348.       if (ai.bar)
  349.         ai.bar.style.setProperty('opacity', 0);
  350.     }, 3000);
  351.   }
  352.  
  353.   static updateCaption(text, doc = document) {
  354.     switch (typeof ai.rule.c) {
  355.       case 'function':
  356.         // not specifying as a parameter's default value to get the html only when needed
  357.         if (text === undefined)
  358.           text = doc.documentElement.outerHTML;
  359.         ai.caption = ai.rule.c(text, doc, ai.node, ai.rule);
  360.         break;
  361.       case 'string': {
  362.         const el = $many(ai.rule.c, doc);
  363.         ai.caption = !el ? '' :
  364.           el.getAttribute('content') ||
  365.           el.getAttribute('title') ||
  366.           el.textContent;
  367.         break;
  368.       }
  369.       default: {
  370.         ai.caption = (ai.tooltip || 0).text || ai.node.alt || '';
  371.         if (ai.caption)
  372.           return;
  373.         const el = ai.node.closest('a[title], img[title], video[title]');
  374.         if (el && (ai.caption = el.title || ''))
  375.           return;
  376.         const url = ai.node.src || (ai.node.closest('[href]') || 0).href;
  377.         ai.caption = url ? Remoting.getFileName(url) : '';
  378.       }
  379.     }
  380.   }
  381.  
  382.   static updateFileInfo() {
  383.     const gi = ai.gItems;
  384.     if (gi) {
  385.       const item = gi[ai.gIndex];
  386.       let c = gi.length > 1 ? '[' + (ai.gIndex + 1) + '/' + gi.length + '] ' : '';
  387.       if (ai.gIndex === 0 && gi.title && (!item.desc || !safeIncludes(item.desc, gi.title)))
  388.         c += gi.title + (item.desc ? ' - ' : '');
  389.       if (item.desc)
  390.         c += item.desc;
  391.       App.setBar(c.trim() || ' ', 'gallery', true);
  392.     } else if ('caption' in ai) {
  393.       App.setBar(ai.caption, 'caption');
  394.     } else if (ai.tooltip) {
  395.       App.setBar(ai.tooltip.text, 'tooltip');
  396.     } else {
  397.       App.setBar(' ', 'info');
  398.     }
  399.   }
  400.  
  401.   static updateMouse(e) {
  402.     const cx = ai.clientX = e.clientX;
  403.     const cy = ai.clientY = e.clientY;
  404.     const r = ai.rect;
  405.     if (r)
  406.       ai.isOverRect =
  407.         cx > r.left - 2 && cx < r.right + 2 &&
  408.         cy > r.top - 2 && cy < r.bottom + 2;
  409.   }
  410.  
  411.   static updateProgress() {
  412.     App.stopTimers();
  413.     let wait;
  414.     if (ai.preloadStart && (wait = ai.preloadStart + cfg.delay - Date.now()) > 0)
  415.       return (ai.timer = setTimeout(App.checkProgress, wait));
  416.     if ((ai.urls || 0).length && Math.max(ai.nheight, ai.nwidth) < 130) {
  417.       App.handleError({type: 'error'});
  418.       return;
  419.     }
  420.     App.setStatus(false);
  421.     Util.forceLayout(ai.popup);
  422.     ai.popup.className = `${PREFIX}show`;
  423.     App.updateSpacing();
  424.     App.updateScales();
  425.     App.updateTitle();
  426.     Popup.move();
  427.     if (!ai.bar)
  428.       App.updateFileInfo();
  429.     ai.large = ai.nwidth > ai.popup.clientWidth + ai.mbw ||
  430.                ai.nheight > ai.popup.clientHeight + ai.mbh;
  431.     if (ai.large)
  432.       App.setStatus('large');
  433.     if (cfg.imgtab && App.isImageTab || cfg.zoom === 'auto')
  434.       App.toggleZoom();
  435.   }
  436.  
  437.   static updateScales() {
  438.     const scales = cfg.scales.length ? cfg.scales : Config.DEFAULTS.scales.slice();
  439.     const fit = Math.min(
  440.       (ai.view.width - ai.mbw - ai.outline * 2) / ai.nwidth,
  441.       (ai.view.height - ai.mbh - ai.outline * 2) / ai.nheight);
  442.     let cutoff = ai.scale = Math.min(1, fit);
  443.     ai.scales = [];
  444.     for (let i = scales.length; i--;) {
  445.       const scale = scales[i];
  446.       const val = parseFloat(scale) || fit;
  447.       const option = typeof scale === 'string' && scale.slice(-1);
  448.       if (option === '!')
  449.         cutoff = val;
  450.       if (option === '*')
  451.         ai.zscale = val;
  452.       if (val !== ai.scale)
  453.         ai.scales.push(val);
  454.     }
  455.     ai.scales = ai.scales
  456.       .filter(x => x >= cutoff)
  457.       .sort((a, b) => a - b);
  458.     ai.scales.unshift(ai.scale);
  459.   }
  460.  
  461.   static updateSpacing() {
  462.     const s = getComputedStyle(ai.popup);
  463.     ai.outline = sumProps(s.outlineOffset, s.outlineWidth);
  464.     ai.pw = sumProps(s.paddingLeft, s.paddingRight);
  465.     ai.ph = sumProps(s.paddingTop, s.paddingBottom);
  466.     ai.mbw = sumProps(s.marginLeft, s.marginRight, s.borderLeftWidth, s.borderRightWidth);
  467.     ai.mbh = sumProps(s.marginTop, s.marginBottom, s.borderTopWidth, s.borderBottomWidth);
  468.   }
  469.  
  470.   static updateStyles() {
  471.     Util.addStyle('global', /*language=CSS*/ App.globalStyle || (App.globalStyle = `
  472.       #${PREFIX}bar {
  473.         position: fixed;
  474.         z-index: 2147483647;
  475.         left: 0;
  476.         right: 0;
  477.         top: 0;
  478.         opacity: 0;
  479.         transition: opacity 1s ease .25s;
  480.         text-align: center;
  481.         font-family: sans-serif;
  482.         font-size: 15px;
  483.         font-weight: bold;
  484.         background: #0005;
  485.         color: white;
  486.         padding: 4px 10px;
  487.         text-shadow: .5px .5px 2px #000;
  488.       }
  489.       #${PREFIX}bar.${PREFIX}show {
  490.         opacity: 1;
  491.       }
  492.       #${PREFIX}bar[data-zoom]::after {
  493.         content: " (" attr(data-zoom) ")";
  494.         opacity: .8;
  495.       }
  496.       #${PREFIX}popup.${PREFIX}show {
  497.         display: inline;
  498.       }
  499.       #${PREFIX}popup {
  500.         display: none;
  501.         border: none;
  502.         box-sizing: content-box;
  503.         position: fixed;
  504.         z-index: 2147483647;
  505.         margin: 0;
  506.         max-width: none;
  507.         max-height: none;
  508.         will-change: display, width, height, left, top;
  509.         cursor: none;
  510.         animation: .2s ${PREFIX}fadein both;
  511.       }
  512.       #${PREFIX}popup.${PREFIX}show {
  513.         box-shadow: 6px 6px 30px transparent;
  514.         transition: box-shadow .25s, background-color .25s;
  515.       }
  516.       #${PREFIX}popup.${PREFIX}show[loaded] {
  517.         box-shadow: 6px 6px 30px black;
  518.         background-color: white;
  519.       }
  520.       #${PREFIX}popup.${PREFIX}zoom-max {
  521.         image-rendering: pixelated;
  522.       }
  523.       @keyframes ${PREFIX}fadein {
  524.         from { opacity: 0; }
  525.         to { opacity: 1; }
  526.       }` + (
  527.       cfg.globalStatus ? `
  528.         .${PREFIX}loading:not(.${PREFIX}preloading) * {
  529.           cursor: wait !important;
  530.         }
  531.         .${PREFIX}edge #${PREFIX}popup {
  532.           cursor: default;
  533.         }
  534.         .${PREFIX}error * {
  535.           cursor: not-allowed !important;
  536.         }
  537.         .${PREFIX}ready *, .${PREFIX}large * {
  538.           cursor: zoom-in !important;
  539.         }
  540.         .${PREFIX}shift * {
  541.           cursor: default !important;
  542.         }
  543.       ` : `
  544.         [${STATUS_ATTR}~="loading"]:not([${STATUS_ATTR}~="preloading"]) {
  545.           cursor: wait !important;
  546.         }
  547.         #${PREFIX}popup[${STATUS_ATTR}~="edge"] {
  548.           cursor: default !important;
  549.         }
  550.         [${STATUS_ATTR}~="error"] {
  551.           cursor: not-allowed !important;
  552.         }
  553.         [${STATUS_ATTR}~="ready"],
  554.         [${STATUS_ATTR}~="large"] {
  555.           cursor: zoom-in !important;
  556.         }
  557.         [${STATUS_ATTR}~="shift"] {
  558.           cursor: default !important;
  559.         }
  560.       `
  561.     ) + (/*language=none*/
  562.       cfg.css.includes('{') ? cfg.css : `#${PREFIX}popup {${cfg.css}}`
  563.     )));
  564.     Util.addStyle('rule', ai.rule.css || '');
  565.   }
  566.  
  567.   static updateTitle() {
  568.     if (!ai.bar)
  569.       return;
  570.     const zoom = `${
  571.       Math.round(ai.scale * 100)
  572.     }%, ${
  573.       ai.nwidth
  574.     } x ${
  575.       ai.nheight
  576.     } px, ${
  577.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  578.     } MP`.replace(/\x20/g, '\xA0');
  579.     if (ai.bar.dataset.zoom !== zoom) {
  580.       ai.bar.dataset.zoom = zoom;
  581.       App.updateBar();
  582.     }
  583.   }
  584. }
  585.  
  586. class Config {
  587.   constructor({data: c = GM_getValue('cfg'), save}) {
  588.     if (typeof c === 'string')
  589.       c = tryCatch(JSON.parse, c);
  590.     if (typeof c !== 'object' || !c)
  591.       c = {};
  592.     const {DEFAULTS} = Config;
  593.     if (c.version !== DEFAULTS.version) {
  594.       if (typeof c.hosts === 'string')
  595.         c.hosts = c.hosts.split('\n')
  596.           .map(s => tryCatch(JSON.parse, s) || s)
  597.           .filter(Boolean);
  598.       if (c.close === true || c.close === false)
  599.         c.zoomOut = c.close ? 'auto' : 'stay';
  600.       for (const key in DEFAULTS)
  601.         if (typeof c[key] !== typeof DEFAULTS[key])
  602.           c[key] = DEFAULTS[key];
  603.       if (c.version === 3 && c.scales[0] === 0)
  604.         c.scales[0] = '0!';
  605.       for (const key in c)
  606.         if (!(key in DEFAULTS))
  607.           delete c[key];
  608.       c.version = DEFAULTS.version;
  609.       if (save)
  610.         GM_setValue('cfg', JSON.stringify(c));
  611.     }
  612.     if (cfg && (
  613.       cfg.css !== c.css ||
  614.       cfg.globalStatus !== c.globalStatus
  615.     )) {
  616.       App.globalStyle = '';
  617.     }
  618.     Object.assign(this, c);
  619.   }
  620. }
  621.  
  622. class Ruler {
  623. /*
  624.  'u' works only with URLs so it's ignored if 'html' is true
  625.    ||some.domain = matches some.domain, anything.some.domain, etc.
  626.    |foo = url or text must start with foo
  627.    ^ = separator like / or ? or : but not a letter/number, not %._-
  628.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  629.  'r' is checked only if 'u' matches first
  630. */
  631.   static init() {
  632.     const errors = new Map();
  633.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  634.     for (const rule of errors.keys())
  635.       App.handleError('Invalid custom host rule:', rule);
  636.  
  637.     // rules that disable previewing
  638.     const disablers = [
  639.       dotDomain.endsWith('.stackoverflow.com') && {
  640.         e: '.post-tag, .post-tag img',
  641.         s: '',
  642.       },
  643.       {
  644.         u: '||disqus.com/',
  645.         s: '',
  646.       },
  647.     ];
  648.  
  649.     // optimization: a rule is created only when on domain
  650.     const perDomain = [
  651.       hostname.includes('startpage') && {
  652.         r: /\boiu=(.+)/,
  653.         s: '$1',
  654.         follow: true,
  655.       },
  656.       dotDomain.endsWith('.4chan.org') && {
  657.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  658.         q: '.op .fileText a',
  659.         css: '#post-preview{display:none}',
  660.       },
  661.       hostname.includes('amazon.') && {
  662.         r: /.+?images\/I\/.+?\./,
  663.         s: m => {
  664.           const uh = doc.getElementById('universal-hover');
  665.           return uh ? '' : m[0] + 'jpg';
  666.         },
  667.         css: '#zoomWindow{display:none!important;}',
  668.       },
  669.       dotDomain.endsWith('.bing.com') && {
  670.         e: 'a[m*="murl"]',
  671.         r: /murl&quot;:&quot;(.+?)&quot;/,
  672.         s: '$1',
  673.         html: true,
  674.       },
  675.       dotDomain.endsWith('.deviantart.com') && {
  676.         e: '[data-super-full-img] *, img[src*="/th/"]',
  677.         s: (m, node) => {
  678.           let el = node.closest('[data-super-full-img]');
  679.           if (el)
  680.             return el.dataset.superFullImg;
  681.           el = node.dataset.embedId && node.nextElementSibling;
  682.           if (el && el.dataset.embedId)
  683.             return el.src;
  684.         },
  685.       },
  686.       dotDomain.endsWith('.deviantart.com') && {
  687.         e: '.dev-view-deviation img',
  688.         s: () => [
  689.           $('.dev-page-download').href,
  690.           $('.dev-content-full').src,
  691.         ].filter(Boolean),
  692.       },
  693.       dotDomain.endsWith('.deviantart.com') && {
  694.         u: ',strp/',
  695.         s: '/\\/v1\\/.*//',
  696.       },
  697.       dotDomain.endsWith('.dropbox.com') && {
  698.         r: /(.+?&size_mode)=\d+(.*)/,
  699.         s: '$1=5$2',
  700.       },
  701.       dotDomain.endsWith('.facebook.com') && {
  702.         e: 'a[href*="ref=hovercard"]',
  703.         s: (m, node) =>
  704.           'https://www.facebook.com/photo.php?fbid=' +
  705.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  706.         follow: true,
  707.       },
  708.       dotDomain.endsWith('.facebook.com') && {
  709.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  710.         s: (m, node) =>
  711.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  712.             decodeURIComponent(m[4]),
  713.         html: true,
  714.         follow: true,
  715.       },
  716.       dotDomain.endsWith('.flickr.com') &&
  717.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  718.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  719.         s: m => `https://www.flickr.com/services/rest/?${
  720.           new URLSearchParams({
  721.             photo_id: m[1],
  722.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  723.             method: 'flickr.photos.getSizes',
  724.             format: 'json',
  725.             nojsoncallback: 1,
  726.           }).toString()}`,
  727.         q: text => JSON.parse(text).sizes.size.pop().source,
  728.       },
  729.       dotDomain.endsWith('.github.com') && {
  730.         r: new RegExp([
  731.           /(avatars.+?&s=)\d+/,
  732.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  733.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  734.         ].map(rx => rx.source).join('|')),
  735.         s: m => `https://${
  736.           m[1] ? `${m[1]}460` :
  737.             m[2] ? `${m[2]}usercontent${m[3]}` :
  738.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  739.         }`,
  740.       },
  741.       isGoogleImages && {
  742.         e: 'a',
  743.         r: /imgres\?imgurl=([^&]+)/,
  744.         s: '$1',
  745.       },
  746.       isGoogleImages && {
  747.         e: '[data-tbnid] a',
  748.         s: (m, node, rule) => {
  749.           const id = node.closest('[data-tbnid]').dataset.tbnid;
  750.           for (const {text} of $$('script', doc)) {
  751.             let i = text.indexOf(id);
  752.             if (i < 0) continue;
  753.             i = text.indexOf('[', i + id.length + 9) + 2;
  754.             const url = text.slice(i, text.indexOf('"', i + 1));
  755.             if (!url.startsWith('http')) continue;
  756.             rule.xhr = !url.startsWith(location.protocol);
  757.             return url;
  758.           }
  759.         },
  760.       },
  761.       dotDomain.endsWith('.instagram.com') && {
  762.         e: [
  763.           'a[href*="/p/"]',
  764.           'a[role="button"][data-reactid*="scontent-"]',
  765.           'article div',
  766.           'article div div img',
  767.         ],
  768.         s: (m, node, rule) => {
  769.           const {a, data} = rule._getData(node) || {};
  770.           rule.follow = !data;
  771.           return (
  772.             !a ? false :
  773.               !data ? a.href :
  774.                 data.video_url || data.display_url);
  775.         },
  776.         c: (html, doc, node, rule) =>
  777.           tryCatch(() => rule._getData(node).data.edge_media_to_caption.edges[0].node.text) || '',
  778.         follow: true,
  779.         _getData(node) {
  780.           const n = node.closest('a[href*="/p/"], article');
  781.           if (!n)
  782.             return;
  783.           const a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  784.           if (!a)
  785.             return;
  786.           try {
  787.             const shortcode = a.pathname.match(/\/p\/(\w+)/)[1];
  788.             return {
  789.               a,
  790.               data: unsafeWindow._sharedData.entry_data.ProfilePage[0]
  791.                 .graphql.user.edge_owner_to_timeline_media.edges
  792.                 .find(e => e.node.shortcode === shortcode)
  793.                 .node,
  794.             };
  795.           } catch (e) {
  796.             return {a};
  797.           }
  798.         },
  799.       },
  800.       dotDomain.endsWith('.reddit.com') && {
  801.         u: '||i.reddituploads.com/',
  802.       },
  803.       dotDomain.endsWith('.reddit.com') && {
  804.         r: /(preview\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  805.         s: 'https://i.$1',
  806.       },
  807.       dotDomain.endsWith('.tumblr.com') && {
  808.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  809.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  810.         follow: true,
  811.       },
  812.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  813.         e: 'a.media-item, a.js-media-image-link',
  814.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  815.         follow: true,
  816.       },
  817.       dotDomain.endsWith('.twitter.com') && {
  818.         e: '.grid-tweet > .media-overlay',
  819.         s: (m, node) => node.previousElementSibling.src,
  820.         follow: true,
  821.       },
  822.     ];
  823.  
  824.     const main = [
  825.       {
  826.         r: /[/?=](https?[^&]+)/,
  827.         s: '$1',
  828.         follow: true,
  829.       },
  830.       {
  831.         u: [
  832.           '||500px.com/photo/',
  833.           '||cl.ly/',
  834.           '||cweb-pix.com/',
  835.           '||ibb.co/',
  836.           '||imgcredit.xyz/image/',
  837.         ],
  838.         r: /\.\w+\/.+/,
  839.         q: 'meta[property="og:image"]',
  840.       },
  841.       {
  842.         u: 'attachment.php',
  843.         r: /attachment\.php.+attachmentid/,
  844.       },
  845.       {
  846.         u: '||abload.de/image',
  847.         q: '#image',
  848.       },
  849.       {
  850.         u: '||deviantart.com/art/',
  851.         s: (m, node) =>
  852.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  853.             '' :
  854.             m.input,
  855.         q: [
  856.           '#download-button[href*=".jpg"]',
  857.           '#download-button[href*=".jpeg"]',
  858.           '#download-button[href*=".gif"]',
  859.           '#download-button[href*=".png"]',
  860.           '#gmi-ResViewSizer_fullimg',
  861.           'img.dev-content-full',
  862.         ],
  863.       },
  864.       {
  865.         u: '||dropbox.com/s',
  866.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  867.         q: (text, doc) =>
  868.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  869.       },
  870.       {
  871.         r: /[./]ebay\.[^/]+\/itm\//,
  872.         q: text =>
  873.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  874.             .replace(/~~60_\d+/, '~~60_57'),
  875.       },
  876.       {
  877.         u: '||i.ebayimg.com/',
  878.         s: (m, node) =>
  879.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  880.             m.input.replace(/~~60_\d+/, '~~60_57'),
  881.       },
  882.       {
  883.         u: [
  884.           '||fastpic.ru/big',
  885.           '||fastpic.ru/thumb',
  886.         ],
  887.         r: /\/\/(?:i(\d+)\.)?([^/]+\/)(big|thumb|view)\/([^.]+?)\.(\w+)/,
  888.         s: (m, node, rule) => {
  889.           const a = node.closest('[href*="fastpic.ru"]');
  890.           const am = a && rule.r.exec(decodeURIComponent(a.href)) || [];
  891.           const p = a && am[4].split('/');
  892.           return `https://i${am[1] || m[1] || am[3] === 'view' && p[0]}.${m[2]}big/${
  893.             am[3] === 'big' ? am[4] : m[4]}.${am[5] || m[5]}?noht=1`;
  894.         },
  895.         xhr: () => 'https://fastpic.ru',
  896.       },
  897.       {
  898.         u: '||fastpic.ru/view/',
  899.         q: 'img[src*="/big/"]',
  900.         xhr: true,
  901.       },
  902.       {
  903.         u: '||facebook.com/',
  904.         r: /photo\.php|[^/]+\/photos\//,
  905.         s: (m, node) =>
  906.           node.id === 'fbPhotoImage' ? false :
  907.             /gradient\.png$/.test(m.input) ? '' :
  908.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  909.         q: [
  910.           'div + span > a:first-child:not([href*="tag_faces"])',
  911.           'div + span > a[href*="tag_faces"] ~ a',
  912.         ],
  913.         rect: '#fbProfileCover',
  914.       },
  915.       {
  916.         u: '||fbcdn.',
  917.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  918.         s: m =>
  919.           dotDomain.endsWith('.facebook.com') &&
  920.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  921.           false,
  922.         manual: true,
  923.       },
  924.       {
  925.         u: ['||fbcdn-', 'fbcdn.net/'],
  926.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  927.         s: (m, node) => {
  928.           if (node.id === 'fbPhotoImage') {
  929.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  930.             if (a)
  931.               return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  932.           }
  933.           if (m[4])
  934.             return false;
  935.           if (node.parentNode.outerHTML.includes('/hovercard/'))
  936.             return '';
  937.           const gp = node.parentNode.parentNode;
  938.           if (node.outerHTML.includes('profile') && gp.href.includes('/photo'))
  939.             return false;
  940.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  941.         },
  942.         rect: '.photoWrap',
  943.       },
  944.       {
  945.         u: '||flickr.com/photos/',
  946.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  947.         s: m =>
  948.           m.input.indexOf('/sizes/') < 0 ?
  949.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  950.             false,
  951.         q: (text, doc) => {
  952.           const links = $$('.sizes-list a', doc);
  953.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  954.         },
  955.         follow: true,
  956.       },
  957.       {
  958.         u: '||flickr.com/photos/',
  959.         r: /\/sizes\//,
  960.         q: '#allsizes-photo > img',
  961.       },
  962.       {
  963.         u: '||gfycat.com/',
  964.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  965.         s: 'https://$1$3',
  966.         q: [
  967.           'meta[content$=".webm"]',
  968.           '#webmsource',
  969.           'source[src$=".webm"]',
  970.         ],
  971.       },
  972.       {
  973.         u: [
  974.           '||googleusercontent.com/proxy',
  975.           '||googleusercontent.com/gadgets/proxy',
  976.         ],
  977.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  978.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  979.       },
  980.       {
  981.         u: [
  982.           '||googleusercontent.com/',
  983.           '||ggpht.com/',
  984.         ],
  985.         s: (m, node) =>
  986.           m.input.includes('webcache.') ||
  987.           node.outerHTML.match(/favicons\?|\b(Ol Rf Ep|Ol Zb ag|Zb HPb|Zb Gtb|Rf Pg|ho PQc|Uk wi hE|go wi Wh|we D0b|Bea)\b/) ||
  988.           node.matches('.g-hovercard *, a[href*="profile_redirector"] > img') ?
  989.             '' :
  990.             m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  991.               .replace(/=[-\w]+([&#].*|$)/, ''),
  992.       },
  993.       {
  994.         u: '||gravatar.com/',
  995.         r: /([a-z0-9]{32})/,
  996.         s: 'https://gravatar.com/avatar/$1?s=200',
  997.       },
  998.       {
  999.         u: '//gyazo.com/',
  1000.         r: /\.com\/\w{32,}/,
  1001.         q: 'meta[name="twitter:image"]',
  1002.         xhr: true,
  1003.       },
  1004.       {
  1005.         u: '||hostingkartinok.com/show-image.php',
  1006.         q: '.image img',
  1007.       },
  1008.       {
  1009.         u: [
  1010.           '||imagecurl.com/images/',
  1011.           '||imagecurl.com/viewer.php',
  1012.         ],
  1013.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1014.         s: 'https://imagecurl.com/images/$1$2$3',
  1015.       },
  1016.       {
  1017.         u: '||imagebam.com/image/',
  1018.         q: 'meta[property="og:image"]',
  1019.         tabfix: true,
  1020.         xhr: hostname.includes('planetsuzy'),
  1021.       },
  1022.       {
  1023.         u: '||imageban.ru/thumbs',
  1024.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1025.         s: '$1out$2/$3/$4',
  1026.       },
  1027.       {
  1028.         u: [
  1029.           '||imageban.ru/show',
  1030.           '||imageban.net/show',
  1031.           '||ibn.im/',
  1032.         ],
  1033.         q: '#img_main',
  1034.       },
  1035.       {
  1036.         u: '||imageshack.us/img',
  1037.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1038.         s: 'https://$2/download/$1/$3$4',
  1039.       },
  1040.       {
  1041.         u: '||imageshack.us/i/',
  1042.         q: '#share-dl',
  1043.       },
  1044.       {
  1045.         u: '||imageteam.org/img',
  1046.         q: 'img[alt="image"]',
  1047.       },
  1048.       {
  1049.         u: [
  1050.           '||imagetwist.com/',
  1051.           '||imageshimage.com/',
  1052.         ],
  1053.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1054.         q: 'img.pic',
  1055.         xhr: true,
  1056.       },
  1057.       {
  1058.         u: '||imageupper.com/i/',
  1059.         q: '#img',
  1060.         xhr: true,
  1061.       },
  1062.       {
  1063.         u: '||imagevenue.com/img.php',
  1064.         q: '#thepic',
  1065.       },
  1066.       {
  1067.         u: '||imagezilla.net/show/',
  1068.         q: '#photo',
  1069.         xhr: true,
  1070.       },
  1071.       {
  1072.         u: [
  1073.           '||images-na.ssl-images-amazon.com/images/',
  1074.           '||media-imdb.com/images/',
  1075.         ],
  1076.         r: /images\/.+?\.jpg/,
  1077.         s: '/V1\\.?_.+?\\.//g',
  1078.       },
  1079.       {
  1080.         u: '||imgbox.com/',
  1081.         r: /\.com\/([a-z0-9]+)$/i,
  1082.         q: '#img',
  1083.         xhr: hostname !== 'imgbox.com',
  1084.       },
  1085.       {
  1086.         u: '||imgclick.net/',
  1087.         r: /\.net\/(\w+)/,
  1088.         q: 'img.pic',
  1089.         xhr: true,
  1090.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1091.       },
  1092.       {
  1093.         u: [
  1094.           '||imgflip.com/i/',
  1095.           '||imgflip.com/gif/',
  1096.         ],
  1097.         r: /\/(i|gif)\/([^/?#]+)/,
  1098.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1099.       },
  1100.       {
  1101.         u: [
  1102.           '||imgur.com/a/',
  1103.           '||imgur.com/gallery/',
  1104.           '||imgur.com/t/',
  1105.         ],
  1106.         g: async (text, doc, url, m, rule, cb) => {
  1107.           // simplified extraction of JSON as it occupies only one line
  1108.           if (!/(?:mergeConfig\('gallery',\s*|Imgur\.Album\.getInstance\()[\s\S]*?[,\s{"'](?:image|album)\s*:\s*({[^\r\n]+?}),?[\r\n]/.test(text))
  1109.             return;
  1110.           const info = JSON.parse(RegExp.$1);
  1111.           let images = info.is_album ? info.album_images.images : [info];
  1112.           if (info.num_images > images.length) {
  1113.             const url = `https://imgur.com/ajaxalbums/getimages/${info.hash}/hit.json?all=true`;
  1114.             images = JSON.parse((await Remoting.gmXhr(url)).responseText).data.images;
  1115.           }
  1116.           const items = [];
  1117.           for (const img of images || []) {
  1118.             const u = `https://i.imgur.com/${img.hash}`;
  1119.             items.push({
  1120.               url: img.ext === '.gif' && img.animated !== false ?
  1121.                 [`${u}.webm`, `${u}.mp4`, u] :
  1122.                 u + img.ext,
  1123.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1124.             });
  1125.           }
  1126.           if (images && info.is_album && !safeIncludes(items[0].desc, info.title))
  1127.             items.title = info.title;
  1128.           cb(items);
  1129.         },
  1130.         css: '.post > .hover { display:none!important; }',
  1131.       },
  1132.       {
  1133.         u: '||imgur.com/',
  1134.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1135.         s: 'gallery',
  1136.         g: (text, doc, url, m) =>
  1137.           m[2].split(',').map(id => ({
  1138.             url: `https://i.${m[1]}${id}.jpg`,
  1139.           })),
  1140.       },
  1141.       {
  1142.         u: '||imgur.com/',
  1143.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.([a-z]+))/i,
  1144.         s: (m, node) => {
  1145.           if (/memegen|random|register|search|signin/.test(m.input))
  1146.             return '';
  1147.           const a = node.closest('a');
  1148.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1149.             return false;
  1150.           const id = m[3].replace(/(.{7})[bhm]$/, '$1');
  1151.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1152.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1153.           return ext === 'webm' ?
  1154.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1155.             u + ext;
  1156.         },
  1157.       },
  1158.       {
  1159.         u: [
  1160.           '||instagr.am/p/',
  1161.           '||instagram.com/p/',
  1162.         ],
  1163.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1164.         q: text => {
  1165.           const m = JSON.parse(text).graphql.shortcode_media;
  1166.           return m.video_url || m.display_url;
  1167.         },
  1168.         rect: 'div.PhotoGridMediaItem',
  1169.         c: text => {
  1170.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1171.           return m === undefined ? '(no caption)' : m.node.text;
  1172.         },
  1173.       },
  1174.       {
  1175.         u: [
  1176.           '||livememe.com/',
  1177.           '||lvme.me/',
  1178.         ],
  1179.         r: /\.\w+\/([^.]+)$/,
  1180.         s: 'http://i.lvme.me/$1.jpg',
  1181.       },
  1182.       {
  1183.         u: '||lostpic.net/image',
  1184.         q: '.image-viewer-image img',
  1185.       },
  1186.       {
  1187.         u: '||makeameme.org/meme/',
  1188.         r: /\/meme\/([^/?#]+)/,
  1189.         s: 'https://media.makeameme.org/created/$1.jpg',
  1190.       },
  1191.       {
  1192.         u: '||photobucket.com/',
  1193.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1194.         s: 'https://i$1$3',
  1195.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1196.       },
  1197.       {
  1198.         u: '||piccy.info/view3/',
  1199.         r: /(.+?\/view3)\/(.*)\//,
  1200.         s: '$1/$2/orig/',
  1201.         q: '#mainim',
  1202.       },
  1203.       {
  1204.         u: '||pimpandhost.com/image/',
  1205.         r: /(.+?\/image\/[0-9]+)/,
  1206.         s: '$1?size=original',
  1207.         q: 'img.original',
  1208.       },
  1209.       {
  1210.         u: [
  1211.           '||pixroute.com/',
  1212.           '||imgspice.com/',
  1213.         ],
  1214.         r: /\.html$/,
  1215.         q: 'img[id]',
  1216.         xhr: true,
  1217.       },
  1218.       {
  1219.         u: '||postima',
  1220.         r: /postima?ge?\.org\/image\/\w+/,
  1221.         q: [
  1222.           'a[href*="dl="]',
  1223.           '#main-image',
  1224.         ],
  1225.       },
  1226.       {
  1227.         u: [
  1228.           '||prntscr.com/',
  1229.           '||prnt.sc/',
  1230.         ],
  1231.         r: /\.\w+\/.+/,
  1232.         q: 'meta[property="og:image"]',
  1233.         xhr: true,
  1234.       },
  1235.       {
  1236.         u: '||radikal.ru/',
  1237.         r: /\.ru\/(fp|.+\.html)/,
  1238.         q: text => text.match(/http:\/\/[a-z0-9]+\.radikal\.ru[a-z0-9/]+\.(jpg|gif|png)/i)[0],
  1239.       },
  1240.       {
  1241.         u: '||tumblr.com',
  1242.         r: /_500\.jpg/,
  1243.         s: ['/_500/_1280/', ''],
  1244.       },
  1245.       {
  1246.         u: '||twimg.com/',
  1247.         r: /\/profile_images/i,
  1248.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1249.       },
  1250.       {
  1251.         u: '||twimg.com/media/',
  1252.         r: /.+?format=(jpe?g|png|gif)/i,
  1253.         s: '$0&name=large',
  1254.       },
  1255.       {
  1256.         u: '||twimg.com/1/proxy',
  1257.         r: /t=([^&_]+)/i,
  1258.         s: m => atob(m[1]).match(/http.+/),
  1259.       },
  1260.       {
  1261.         u: '||pic.twitter.com/',
  1262.         r: /\.com\/[a-z0-9]+/i,
  1263.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1264.         follow: true,
  1265.       },
  1266.       {
  1267.         u: '||twitpic.com/',
  1268.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1269.         s: 'https://twitpic.com/show/large/$2',
  1270.       },
  1271.       {
  1272.         u: '||upix.me/files',
  1273.         s: '/#//',
  1274.       },
  1275.       {
  1276.         u: '||wiki',
  1277.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1278.         s: '/\\/thumb(?=\\/)|' +
  1279.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1280.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1281.         xhr: !hostname.includes('wiki'),
  1282.       },
  1283.       {
  1284.         u: '||ytimg.com/vi/',
  1285.         r: /(.+?\/vi\/[^/]+)/,
  1286.         s: '$1/0.jpg',
  1287.         rect: '.video-list-item',
  1288.       },
  1289.       {
  1290.         u: '/viewer.php?file=',
  1291.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1292.         s: '$1/images/$2',
  1293.         xhr: true,
  1294.       },
  1295.       {
  1296.         u: '/thumb_',
  1297.         r: /\/albums.+\/thumb_[^/]/,
  1298.         s: '/thumb_//',
  1299.       },
  1300.       {
  1301.         u: [
  1302.           '.th.jp',
  1303.           '.th.gif',
  1304.           '.th.png',
  1305.         ],
  1306.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1307.         s: '$1$2',
  1308.         follow: true,
  1309.       },
  1310.       {
  1311.         u: [
  1312.           '.jp',
  1313.           '.gif',
  1314.           '.png',
  1315.           '.svg',
  1316.           '.webm',
  1317.         ],
  1318.         r: /[^?:]+\.(jpe?g?|gif|png|svg|webm)($|\?)/i,
  1319.       },
  1320.     ];
  1321.  
  1322.     /** @type mpiv.HostRule[] */
  1323.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1324.   }
  1325.  
  1326.   static format(rule, {expand} = {}) {
  1327.     const s = JSON.stringify(rule, null, ' ');
  1328.     return expand ?
  1329.       /* {"a": ...,
  1330.           "b": ...,
  1331.           "c": ...
  1332.          } */
  1333.       s.replace(/^{\s+/g, '{') :
  1334.       /* {"a": ..., "b": ..., "c": ...} */
  1335.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1336.   }
  1337.  
  1338.   /** @returns mpiv.HostRule | Error | false | undefined */
  1339.   static parse(rule) {
  1340.     const isBatchOp = this instanceof Map;
  1341.     try {
  1342.       if (typeof rule === 'string')
  1343.         rule = JSON.parse(rule);
  1344.       if ('d' in rule && typeof rule.d !== 'string')
  1345.         rule.d = undefined;
  1346.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1347.         return false;
  1348.       const compileTo = isBatchOp ? rule : {};
  1349.       if (rule.r)
  1350.         compileTo.r = new RegExp(rule.r, 'i');
  1351.       if (RX_HAS_CODE.test(rule.s))
  1352.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1353.       if (RX_HAS_CODE.test(rule.q))
  1354.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1355.       if (RX_HAS_CODE.test(rule.c))
  1356.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1357.       return rule;
  1358.     } catch (e) {
  1359.       if (!e.message.includes('unsafe-eval'))
  1360.         if (isBatchOp) {
  1361.           this.set(rule, e);
  1362.         } else {
  1363.           return e;
  1364.         }
  1365.     }
  1366.   }
  1367.  
  1368.   static runQ(text, doc, docUrl) {
  1369.     let url;
  1370.     if (typeof ai.rule.q === 'function') {
  1371.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1372.       if (Array.isArray(url)) {
  1373.         ai.urls = url.slice(1);
  1374.         url = url[0];
  1375.       }
  1376.     } else {
  1377.       const el = $many(ai.rule.q, doc);
  1378.       url = el && Remoting.findFileUrl(el, docUrl);
  1379.     }
  1380.     return url;
  1381.   }
  1382.  
  1383.   static runS(node, rule, m) {
  1384.     let urls = [];
  1385.     for (const s of ensureArray(rule.s))
  1386.       urls.push(
  1387.         typeof s === 'string' ? Util.maybeDecodeURL(Ruler.substituteSingle(s, m)) :
  1388.           typeof s === 'function' ? s(m, node, rule) :
  1389.             s);
  1390.     if (rule.q && urls.length > 1) {
  1391.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1392.       return {skipRule: true};
  1393.     }
  1394.     if (Array.isArray(urls[0]))
  1395.       urls = urls[0];
  1396.     // `false` returned by "s" property means "skip this rule"
  1397.     // any other falsy value (like say "") means "stop all rules"
  1398.     return urls[0] === false ? {skipRule: true} : urls.map(Util.maybeDecodeURL);
  1399.   }
  1400.  
  1401.   static substituteSingle(s, m) {
  1402.     if (!m)
  1403.       return s;
  1404.     if (s.startsWith('/') && !s.startsWith('//')) {
  1405.       const mid = s.search(/[^\\]\//) + 1;
  1406.       const end = s.lastIndexOf('/');
  1407.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1408.       return m.input.replace(re, s.slice(mid + 1, end));
  1409.     }
  1410.     if (m.length && s.includes('$')) {
  1411.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  1412.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  1413.         for (let i = maxLength; i >= 0; i--) {
  1414.           const part = num.slice(0, i) | 0;
  1415.           if (part < m.length)
  1416.             return (m[part] || '') + num.slice(i);
  1417.         }
  1418.         return text;
  1419.       });
  1420.     }
  1421.     return s;
  1422.   }
  1423. }
  1424.  
  1425. const SimpleUrlMatcher = (() => {
  1426.   // string-to-regexp escaped chars
  1427.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  1428.   // rx for '^' symbol in simple url match
  1429.   const RX_SEP = /[^\w%._-]/g;
  1430.   const RXS_SEP = RX_SEP.source;
  1431.   return match => {
  1432.     const results = [];
  1433.     for (const s of ensureArray(match)) {
  1434.       const pinDomain = s.startsWith('||');
  1435.       const pinStart = !pinDomain && s.startsWith('|');
  1436.       const endSep = s.endsWith('^');
  1437.       let fn;
  1438.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  1439.       if (needle.includes('^')) {
  1440.         const plain = findLongestPart(needle);
  1441.         const rx = new RegExp(
  1442.           (pinStart ? '^' : '') +
  1443.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  1444.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  1445.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  1446.         needle = [plain, rx];
  1447.         fn = regexp;
  1448.       } else if (pinStart) {
  1449.         fn = endSep ? equals : starts;
  1450.       } else if (pinDomain) {
  1451.         const slashPos = needle.indexOf('/');
  1452.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  1453.         needle = [needle, domain, slashPos > 0, endSep];
  1454.         fn = startsDomainPrescreen;
  1455.       } else if (endSep) {
  1456.         fn = ends;
  1457.       } else {
  1458.         fn = has;
  1459.       }
  1460.       results.push({fn, this: needle});
  1461.     }
  1462.     return results.length > 1 ?
  1463.       {fn: checkArray, this: results} :
  1464.       results[0];
  1465.   };
  1466.   function checkArray(s) {
  1467.     return this.some(checkArrayItem, s);
  1468.   }
  1469.   function checkArrayItem(item) {
  1470.     return item.fn.call(item.this, this);
  1471.   }
  1472.   function equals(s) {
  1473.     return s.startsWith(this) && (
  1474.       s.length === this.length ||
  1475.       s.length === this.length + 1 && endsWithSep(s));
  1476.   }
  1477.   function starts(s) {
  1478.     return s.startsWith(this);
  1479.   }
  1480.   function ends(s) {
  1481.     return s.endsWith(this) || (
  1482.       s.length > this.length &&
  1483.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  1484.       endsWithSep(s));
  1485.   }
  1486.   function has(s) {
  1487.     return s.includes(this);
  1488.   }
  1489.   function regexp(s) {
  1490.     return s.includes(this[0]) && this[1].test(s);
  1491.   }
  1492.   function endsWithSep(s) {
  1493.     RX_SEP.lastIndex = s.length - 1;
  1494.     return RX_SEP.test(s);
  1495.   }
  1496.   function startsDomainPrescreen(url) {
  1497.     return url.includes(this[0]) && startsDomain.call(this, url);
  1498.   }
  1499.   function startsDomain(url) {
  1500.     const [p, gap, host] = url.split('/', 3);
  1501.     if (gap || p && !p.endsWith(':'))
  1502.       return;
  1503.     const [needle, domain, pinDomainEnd, endSep] = this;
  1504.     let start = pinDomainEnd ? host.length - domain.length : 0;
  1505.     for (; ; start++) {
  1506.       start = host.indexOf(domain, start);
  1507.       if (start < 0)
  1508.         return;
  1509.       if (!start || host[start - 1] === '.')
  1510.         break;
  1511.     }
  1512.     start += p.length + 2;
  1513.     return url.lastIndexOf(needle, start) === start &&
  1514.            (!endSep || start + needle.length === url.length);
  1515.   }
  1516.   function findLongestPart(s) {
  1517.     const len = s.length;
  1518.     let maxLen = 0;
  1519.     let start;
  1520.     for (let i = 0, j; i < len; i = j + 1) {
  1521.       j = s.indexOf('^', i);
  1522.       if (j < 0)
  1523.         j = len;
  1524.       if (j - i > maxLen) {
  1525.         maxLen = j - i;
  1526.         start = i;
  1527.       }
  1528.     }
  1529.     return maxLen < len ? s.substr(start, maxLen) : s;
  1530.   }
  1531. })();
  1532.  
  1533. class RuleMatcher {
  1534.  
  1535.   /** @returns ?mpiv.RuleMatchInfo */
  1536.   static findForLink(a) {
  1537.     let url =
  1538.       a.getAttribute('data-expanded-url') ||
  1539.       a.getAttribute('data-full-url') ||
  1540.       a.getAttribute('data-url') ||
  1541.       a.href;
  1542.     if (url.startsWith('data:'))
  1543.       url = false;
  1544.     else if (url.includes('//t.co/'))
  1545.       url = 'http://' + a.textContent;
  1546.     return RuleMatcher.find(url, a);
  1547.   }
  1548.  
  1549.   /** @returns ?mpiv.RuleMatchInfo */
  1550.   static find(url, node, {noHtml, skipRule} = {}) {
  1551.     const tn = node.tagName;
  1552.     let m, html, urls;
  1553.     for (const rule of Ruler.rules) {
  1554.       const {e} = rule;
  1555.       if (e && !node.matches(e) || rule === skipRule)
  1556.         continue;
  1557.       const {r, u} = rule;
  1558.       if (r && !noHtml && rule.html && (tn === 'A' || tn === 'IMG' || e))
  1559.         m = r.exec(html || (html = node.outerHTML));
  1560.       else if (r || u)
  1561.         m = url && RuleMatcher.makeUrlMatch(url, node, rule);
  1562.       else
  1563.         m = url ? RuleMatcher.makeDummyMatch(url) : [];
  1564.       if (!m ||
  1565.           // a rule with follow:true for the currently hovered IMG produced a URL,
  1566.           // but we'll only allow it to match rules without 's' in the nested find call
  1567.           tn === 'IMG' && !('s' in rule) && !skipRule)
  1568.         continue;
  1569.       if (rule.s === '')
  1570.         return {};
  1571.       const hasS = 's' in rule && rule.s !== 'gallery';
  1572.       urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  1573.       if (!urls.skipRule) {
  1574.         const url = urls[0];
  1575.         return !url ? {} :
  1576.           hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule) ?
  1577.             RuleMatcher.find(url, node, {skipRule: rule}) :
  1578.             RuleMatcher.makeInfo(urls, node, rule, m);
  1579.       }
  1580.     }
  1581.   }
  1582.  
  1583.   static makeUrlMatch(url, node, rule) {
  1584.     let {r, u} = rule;
  1585.     let m;
  1586.     if (u) {
  1587.       u = rule._u || (rule._u = SimpleUrlMatcher(u));
  1588.       m = u.fn.call(u.this, url) && (r || RuleMatcher.makeDummyMatch(url));
  1589.     }
  1590.     return (m || !u) && r ? r.exec(url) : m;
  1591.   }
  1592.  
  1593.   static makeDummyMatch(url) {
  1594.     const m = [url];
  1595.     m.index = 0;
  1596.     m.input = url;
  1597.     return m;
  1598.   }
  1599.  
  1600.   /** @returns mpiv.RuleMatchInfo */
  1601.   static makeInfo(urls, node, rule, m) {
  1602.     const url = urls[0];
  1603.     const info = {
  1604.       node,
  1605.       rule,
  1606.       url,
  1607.       urls: urls.length > 1 ? urls.slice(1) : null,
  1608.       match: m,
  1609.       gallery: rule.g && Gallery.makeParser(rule.g),
  1610.       post: typeof rule.post === 'function' ? rule.post(m) : rule.post,
  1611.       xhr: cfg.xhr && rule.xhr,
  1612.     };
  1613.     Util.lazyGetRect(info, node, rule.rect);
  1614.     if (
  1615.       dotDomain.endsWith('.twitter.com') && !/(facebook|google|twimg|twitter)\.com\//.test(url) ||
  1616.       dotDomain.endsWith('.github.com') && !/github/.test(url) ||
  1617.       dotDomain.endsWith('.facebook.com') && /\bimgur\.com/.test(url)
  1618.     ) {
  1619.       info.xhr = 'data';
  1620.     }
  1621.     return info;
  1622.   }
  1623.  
  1624.   static isFollowableUrl(url, rule) {
  1625.     const f = rule.follow;
  1626.     return typeof f === 'function' ? f(url) : f;
  1627.   }
  1628. }
  1629.  
  1630. class Events {
  1631.  
  1632.   static onMouseOver(e) {
  1633.     if (!App.enabled || e.shiftKey || ai.zoom)
  1634.       return;
  1635.     let node = e.target;
  1636.     if (node === ai.popup ||
  1637.         node === doc.body ||
  1638.         node === doc.documentElement)
  1639.       return;
  1640.  
  1641.     if (node.shadowRoot)
  1642.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  1643.  
  1644.     if (!Ruler.rules)
  1645.       Ruler.init();
  1646.  
  1647.     let a, img, url, info;
  1648.     if (node.tagName === 'A') {
  1649.       a = node;
  1650.     } else {
  1651.       if (node.tagName === 'IMG') {
  1652.         img = node;
  1653.         url = !img.src.startsWith('data:') && Util.rel2abs(img.src, location.href);
  1654.       }
  1655.       info = RuleMatcher.find(url, node);
  1656.       a = !info && node.closest('a');
  1657.     }
  1658.  
  1659.     if (!info && a)
  1660.       info = RuleMatcher.findForLink(a);
  1661.  
  1662.     if (!info && img) {
  1663.       info = Util.lazyGetRect({
  1664.         url: img.src,
  1665.         node: img,
  1666.         rule: {},
  1667.       }, img);
  1668.     }
  1669.  
  1670.     if (info && info.url && info.node !== ai.node)
  1671.       App.activate(info, e);
  1672.   }
  1673.  
  1674.   static pierceShadow(node, x, y) {
  1675.     for (let root; (root = node.shadowRoot);) {
  1676.       root.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  1677.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1678.       const inner = root.elementFromPoint(x, y);
  1679.       if (!inner || inner === node)
  1680.         break;
  1681.       node = inner;
  1682.     }
  1683.     return node;
  1684.   }
  1685.  
  1686.   static onMouseOut(e) {
  1687.     if (!e.relatedTarget && !e.shiftKey)
  1688.       App.deactivate();
  1689.   }
  1690.  
  1691.   static onMouseOutShadow(e) {
  1692.     const root = e.target.shadowRoot;
  1693.     if (root) {
  1694.       root.removeEventListener('mouseover', Events.onMouseOver);
  1695.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  1696.     }
  1697.   }
  1698.  
  1699.   static onMouseMove(e) {
  1700.     App.updateMouse(e);
  1701.     if (e.shiftKey)
  1702.       return (ai.lazyUnload = true);
  1703.     if (!ai.zoomed && !ai.isOverRect)
  1704.       return App.deactivate();
  1705.     if (ai.zoom) {
  1706.       Popup.move();
  1707.       const {height: h, width: w} = ai.view;
  1708.       const {clientX: cx, clientY: cy} = ai;
  1709.       const bx = w / 6;
  1710.       const by = h / 6;
  1711.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  1712.       App.setStatus(`${onEdge ? '+' : '-'}edge`);
  1713.     }
  1714.   }
  1715.  
  1716.   static onMouseDown({shiftKey, button}) {
  1717.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  1718.       ai.controlled = ai.zoomed = true;
  1719.     } else if (button === 2 || shiftKey) {
  1720.       // we ignore RMB and Shift
  1721.     } else {
  1722.       App.deactivate({wait: true});
  1723.     }
  1724.   }
  1725.  
  1726.   static onMouseScroll(e) {
  1727.     const dir = (e.deltaY || -e.wheelDelta) > 0 ? 1 : -1;
  1728.     if (ai.zoom) {
  1729.       dropEvent(e);
  1730.       const i = ai.scales.indexOf(ai.scale) - dir;
  1731.       const n = ai.scales.length;
  1732.       if (i >= 0 && i < n)
  1733.         ai.scale = ai.scales[i];
  1734.       if (i === 0 && cfg.zoomOut !== 'stay') {
  1735.         if ((cfg.zoomOut === 'close' || !ai.isOverRect) &&
  1736.             (!ai.gItems || ai.gItems.length < 2))
  1737.           return App.deactivate({wait: true});
  1738.         ai.zoom = false;
  1739.         ai.zoomed = false;
  1740.         App.updateFileInfo();
  1741.       } else {
  1742.         ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1743.       }
  1744.       if (ai.zooming)
  1745.         ai.popup.classList.add(`${PREFIX}zooming`);
  1746.       Popup.move();
  1747.       App.updateTitle();
  1748.     } else if (ai.gItems && ai.gItems.length > 1 && ai.popup) {
  1749.       dropEvent(e);
  1750.       Gallery.next(dir);
  1751.     } else if (cfg.zoom === 'wheel' && dir < 0 && ai.popup) {
  1752.       dropEvent(e);
  1753.       App.toggleZoom();
  1754.     } else {
  1755.       App.deactivate();
  1756.     }
  1757.   }
  1758.  
  1759.   static onKeyDown(e) {
  1760.     switch (e.key) {
  1761.       case 'Shift':
  1762.         App.setStatus('+shift');
  1763.         if (ai.popup && 'controls' in ai.popup)
  1764.           ai.popup.controls = true;
  1765.         break;
  1766.       case 'Control':
  1767.         if (!ai.popup && (cfg.start !== 'auto' || ai.rule.manual))
  1768.           Popup.start();
  1769.         break;
  1770.     }
  1771.   }
  1772.  
  1773.   static onKeyUp(e) {
  1774.     switch (e.key.length > 1 ? e.key : e.code) {
  1775.       case 'Shift':
  1776.         App.setStatus('-shift');
  1777.         if ((ai.popup || {}).controls)
  1778.           ai.popup.controls = false;
  1779.         if (ai.controlled) {
  1780.           ai.controlled = false;
  1781.           return;
  1782.         }
  1783.         ai.popup && (ai.zoomed || ai.isOverRect !== false) ?
  1784.           App.toggleZoom() :
  1785.           App.deactivate({wait: true});
  1786.         break;
  1787.       case 'Control':
  1788.         break;
  1789.       case 'Escape':
  1790.         App.deactivate({wait: true});
  1791.         break;
  1792.       case 'ArrowRight':
  1793.       case 'KeyJ':
  1794.         dropEvent(e);
  1795.         Gallery.next(1);
  1796.         break;
  1797.       case 'ArrowLeft':
  1798.       case 'KeyK':
  1799.         dropEvent(e);
  1800.         Gallery.next(-1);
  1801.         break;
  1802.       case 'KeyD': {
  1803.         dropEvent(e);
  1804.         Remoting.saveFile();
  1805.         break;
  1806.       }
  1807.       case 'KeyT':
  1808.         ai.lazyUnload = true;
  1809.         GM_openInTab(
  1810.           ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  1811.           navigator.userAgent.includes('Gecko/') ?
  1812.             Util.tabFixUrl() :
  1813.             ai.popup.src);
  1814.         App.deactivate();
  1815.         break;
  1816.       default:
  1817.         App.deactivate({wait: true});
  1818.     }
  1819.   }
  1820.  
  1821.   static onContext(e) {
  1822.     if (e.shiftKey)
  1823.       return;
  1824.     if (cfg.zoom === 'context' && ai.popup && App.toggleZoom()) {
  1825.       dropEvent(e);
  1826.       return;
  1827.     }
  1828.     if (!ai.popup && (
  1829.       cfg.start === 'context' ||
  1830.       (cfg.start === 'auto' && ai.rule.manual)
  1831.     )) {
  1832.       Popup.start();
  1833.       dropEvent(e);
  1834.     } else {
  1835.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1836.     }
  1837.   }
  1838. }
  1839.  
  1840. class Popup {
  1841.  
  1842.   static schedule(force) {
  1843.     if (!cfg.preload) {
  1844.       ai.timer = setTimeout(Popup.start, cfg.delay);
  1845.     } else if (!force) {
  1846.       // we don't want to preload everything in the path of a quickly moving mouse cursor
  1847.       ai.timer = setTimeout(Popup.schedule, SETTLE_TIME, true);
  1848.       ai.preloadStart = Date.now();
  1849.     } else {
  1850.       Popup.start();
  1851.       App.setStatus('+preloading');
  1852.       setTimeout(App.setStatus, cfg.delay, '-preloading');
  1853.     }
  1854.   }
  1855.  
  1856.   static start() {
  1857.     App.updateStyles();
  1858.     ai.gallery ?
  1859.       Popup.startGallery() :
  1860.       Popup.startSingle();
  1861.   }
  1862.  
  1863.   static startSingle() {
  1864.     App.setStatusLoading();
  1865.     ai.imageUrl = null;
  1866.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  1867.       Remoting.findRedirect();
  1868.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  1869.       Popup.startFromQ();
  1870.     } else {
  1871.       App.updateCaption();
  1872.       Popup.render(ai.url);
  1873.     }
  1874.   }
  1875.  
  1876.   static async startFromQ() {
  1877.     try {
  1878.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  1879.       const url = Ruler.runQ(responseText, doc, finalUrl);
  1880.       if (!url)
  1881.         throw 'File not found.';
  1882.       App.updateCaption(responseText, doc);
  1883.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  1884.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  1885.         if (!info || !info.url)
  1886.           throw `Couldn't follow URL: ${url}`;
  1887.         Object.assign(ai, info);
  1888.         Popup.startSingle();
  1889.       } else {
  1890.         Popup.render(url, finalUrl);
  1891.       }
  1892.     } catch (e) {
  1893.       App.handleError(e);
  1894.     }
  1895.   }
  1896.  
  1897.   static async startGallery() {
  1898.     App.setStatusLoading();
  1899.     try {
  1900.       const startUrl = ai.url;
  1901.       const p = ai.rule.s === 'gallery' ? {} :
  1902.         await Remoting.getDoc(startUrl);
  1903.       const items = await new Promise(resolve => {
  1904.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, resolve);
  1905.         if (Array.isArray(it))
  1906.           resolve(it);
  1907.       });
  1908.       // bail out if the gallery's async callback took too long
  1909.       if (ai.url !== startUrl)
  1910.         return;
  1911.       ai.gItems = items.length && items;
  1912.       if (ai.gItems) {
  1913.         ai.gIndex = Gallery.findIndex(ai.url);
  1914.         setTimeout(Gallery.next);
  1915.       } else {
  1916.         throw 'Empty gallery';
  1917.       }
  1918.     } catch (e) {
  1919.       App.handleError(e);
  1920.     }
  1921.   }
  1922.  
  1923.   static async render(src, pageUrl) {
  1924.     Popup.destroy();
  1925.     ai.imageUrl = src;
  1926.     if (ai.xhr && src)
  1927.       src = await Remoting.getImage(src, pageUrl).catch(App.handleError);
  1928.     if (!src)
  1929.       return;
  1930.     const p = ai.popup =
  1931.       src.startsWith('data:video') ||
  1932.       !src.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(src) ?
  1933.         PopupVideo.create() :
  1934.         $create('img');
  1935.     p.id = `${PREFIX}popup`;
  1936.     p.src = src;
  1937.     p.addEventListener('error', App.handleError);
  1938.     p.addEventListener('load', Popup.onLoad, {once: true});
  1939.     if (ai.zooming)
  1940.       p.addEventListener('transitionend', Popup.onZoom);
  1941.     doc.body.insertBefore(p, ai.bar || undefined);
  1942.     App.checkProgress({start: true});
  1943.   }
  1944.  
  1945.   static onLoad() {
  1946.     this.setAttribute('loaded', '');
  1947.     ai.popupLoaded = true;
  1948.     if (!ai.bar)
  1949.       App.updateFileInfo();
  1950.   }
  1951.  
  1952.   static onZoom() {
  1953.     return this.classList.remove(`${PREFIX}zooming`);
  1954.   }
  1955.  
  1956.   static move() {
  1957.     const p = ai.popup;
  1958.     if (!p)
  1959.       return;
  1960.     let x, y;
  1961.     const w = Math.round(ai.scale * ai.nwidth);
  1962.     const h = Math.round(ai.scale * ai.nheight);
  1963.     const cx = ai.clientX;
  1964.     const cy = ai.clientY;
  1965.     const vw = ai.view.width - ai.outline * 2;
  1966.     const vh = ai.view.height - ai.outline * 2;
  1967.     if (!ai.zoom && (!ai.gItems || ai.gItems.length < 2) && !cfg.center) {
  1968.       const r = ai.rect;
  1969.       const rx = (r.left + r.right) / 2;
  1970.       const ry = (r.top + r.bottom) / 2;
  1971.       if (vw - r.right - 40 > w + ai.mbw || w + ai.mbw < r.left - 40) {
  1972.         if (h + ai.mbh < vh - 60)
  1973.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1974.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1975.       } else if (vh - r.bottom - 40 > h + ai.mbh || h + ai.mbh < r.top - 40) {
  1976.         if (w + ai.mbw < vw - 60)
  1977.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1978.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1979.       }
  1980.     }
  1981.     if (x === undefined) {
  1982.       const mid = vw > w ?
  1983.         vw / 2 - w / 2 :
  1984.         -1 * clamp(5 / 3 * (cx / vw - 0.2), 0, 1) * (w - vw);
  1985.       x = Math.round(mid - (ai.pw + ai.mbw) / 2);
  1986.     }
  1987.     if (y === undefined) {
  1988.       const mid = vh > h ?
  1989.         vh / 2 - h / 2 :
  1990.         -1 * clamp(5 / 3 * (cy / vh - 0.2), 0, 1) * (h - vh);
  1991.       y = Math.round(mid - (ai.ph + ai.mbh) / 2);
  1992.     }
  1993.     p.style.cssText = `
  1994.       width: ${w}px !important;
  1995.       height: ${h}px !important;
  1996.       left: ${x + ai.outline}px !important;
  1997.       top: ${y + ai.outline}px !important;
  1998.     `;
  1999.   }
  2000.  
  2001.   static destroy() {
  2002.     const p = ai.popup;
  2003.     if (!p)
  2004.       return;
  2005.     p.removeEventListener('error', App.handleError);
  2006.     if (typeof p.pause === 'function')
  2007.       p.pause();
  2008.     if (!ai.lazyUnload) {
  2009.       if (p.src.startsWith('blob:'))
  2010.         URL.revokeObjectURL(p.src);
  2011.       p.src = '';
  2012.     }
  2013.     p.remove();
  2014.     ai.zoom = false;
  2015.     ai.popupLoaded = false;
  2016.     ai.popup = null;
  2017.   }
  2018. }
  2019.  
  2020. class PopupVideo {
  2021.   static create() {
  2022.     const p = $create('video');
  2023.     p.autoplay = true;
  2024.     p.loop = true;
  2025.     p.volume = 0.5;
  2026.     p.controls = false;
  2027.     p.addEventListener('progress', PopupVideo.progress);
  2028.     p.addEventListener('canplaythrough', PopupVideo.progressDone, {once: true});
  2029.     ai.bufferingBar = false;
  2030.     ai.bufferingStart = Date.now();
  2031.     return p;
  2032.   }
  2033.  
  2034.   static progress() {
  2035.     const {duration} = this;
  2036.     if (duration && this.buffered.length && Date.now() - ai.bufferingStart > 2000) {
  2037.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  2038.       if ((ai.bufferingBar |= pct > 0 && pct < 50))
  2039.         App.setBar(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  2040.     }
  2041.   }
  2042.  
  2043.   static progressDone() {
  2044.     this.removeEventListener('progress', PopupVideo.progress);
  2045.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`)) {
  2046.       App.setBar(false);
  2047.       App.updateFileInfo();
  2048.     }
  2049.   }
  2050. }
  2051.  
  2052. class Gallery {
  2053.  
  2054.   static makeParser(g) {
  2055.     return (
  2056.       typeof g === 'function' ? g :
  2057.         typeof g === 'string' ? Util.newFunction('text', 'doc', 'url', 'm', 'rule', 'cb', g) :
  2058.           Gallery.defaultParser
  2059.     );
  2060.   }
  2061.  
  2062.   static findIndex(gUrl) {
  2063.     const sel = gUrl.split('#')[1];
  2064.     if (!sel)
  2065.       return 0;
  2066.     if (/^\d+$/.test(sel))
  2067.       return parseInt(sel);
  2068.     for (let i = ai.gItems.length; i--;) {
  2069.       let {url} = ai.gItems[i];
  2070.       if (Array.isArray(url))
  2071.         url = url[0];
  2072.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  2073.         return i;
  2074.     }
  2075.     return 0;
  2076.   }
  2077.  
  2078.   static next(dir) {
  2079.     if (dir > 0 && (ai.gIndex += dir) >= ai.gItems.length) {
  2080.       ai.gIndex = 0;
  2081.     } else if (dir < 0 && (ai.gIndex += dir) < 0) {
  2082.       ai.gIndex = ai.gItems.length - 1;
  2083.     }
  2084.     const item = ai.gItems[ai.gIndex];
  2085.     if (Array.isArray(item.url)) {
  2086.       ai.urls = item.url.slice(1);
  2087.       ai.url = item.url[0];
  2088.     } else {
  2089.       ai.urls = null;
  2090.       ai.url = item.url;
  2091.     }
  2092.     Popup.destroy();
  2093.     Popup.startSingle();
  2094.     App.updateFileInfo();
  2095.     Gallery.preload(dir);
  2096.   }
  2097.  
  2098.   static preload(dir) {
  2099.     const i = ai.gIndex + dir;
  2100.     if (ai.popup && i >= 0 && i < ai.gItems.length) {
  2101.       ai.preloadUrl = ensureArray(ai.gItems[i].url)[0];
  2102.       ai.popup.addEventListener('load', Gallery.preloadOnLoad, {once: true});
  2103.     }
  2104.   }
  2105.  
  2106.   static preloadOnLoad() {
  2107.     $create('img', {src: ai.preloadUrl});
  2108.   }
  2109.  
  2110.   static defaultParser(text, doc, docUrl, m, rule) {
  2111.     const {g} = rule;
  2112.     const qEntry = g.entry;
  2113.     const qCaption = ensureArray(g.caption);
  2114.     const qImage = g.image;
  2115.     const qTitle = g.title;
  2116.     const fix =
  2117.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  2118.       (s => s.trim());
  2119.     const items = [...$$(qEntry || qImage, doc)]
  2120.       .map(processEntry)
  2121.       .filter(Boolean);
  2122.     items.title = processTitle();
  2123.     return items;
  2124.  
  2125.     function processEntry(entry) {
  2126.       const item = {};
  2127.       try {
  2128.         const img = qEntry ? $(qImage, entry) : entry;
  2129.         item.url = fix(Remoting.findFileUrl(img, docUrl), true);
  2130.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  2131.       } catch (e) {}
  2132.       return item.url && item;
  2133.     }
  2134.  
  2135.     function processCaption(selector) {
  2136.       const el = $(selector, this) ||
  2137.                  $orSelf(selector, this.previousElementSibling) ||
  2138.                  $orSelf(selector, this.nextElementSibling);
  2139.       return el && fix(el.textContent);
  2140.     }
  2141.  
  2142.     function processTitle() {
  2143.       const el = $(qTitle, doc);
  2144.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  2145.     }
  2146.  
  2147.     function $orSelf(selector, el) {
  2148.       if (el && !el.matches(qEntry))
  2149.         return el.matches(selector) ? el : $(selector, el);
  2150.     }
  2151.   }
  2152. }
  2153.  
  2154. class Remoting {
  2155.  
  2156.   static gmXhr(url, opts = {}) {
  2157.     if (ai.req)
  2158.       tryCatch.call(ai.req, ai.req.abort);
  2159.     return new Promise((resolve, reject) => {
  2160.       ai.req = GM_xmlhttpRequest({
  2161.         url,
  2162.         method: 'GET',
  2163.         timeout: 10e3,
  2164.         ...opts,
  2165.         onload: done,
  2166.         onerror: done,
  2167.         ontimeout() {
  2168.           ai.req = null;
  2169.           reject(`Timeout fetching ${url}`);
  2170.         },
  2171.       });
  2172.       function done(r) {
  2173.         ai.req = null;
  2174.         r.status < 400 && !r.error ?
  2175.           resolve(r) :
  2176.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2177.       }
  2178.     });
  2179.   }
  2180.  
  2181.   static async getDoc(url) {
  2182.     const r = await (!ai.post ?
  2183.       Remoting.gmXhr(url) :
  2184.       Remoting.gmXhr(url, {
  2185.         method: 'POST',
  2186.         data: ai.post,
  2187.         headers: {
  2188.           'Content-Type': 'application/x-www-form-urlencoded',
  2189.           'Referer': url,
  2190.         },
  2191.       }));
  2192.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2193.     return r;
  2194.   }
  2195.  
  2196.   static async getImage(url, pageUrl) {
  2197.     ai.bufferingBar = false;
  2198.     ai.bufferingStart = Date.now();
  2199.     const response = await Remoting.gmXhr(url, {
  2200.       responseType: 'blob',
  2201.       headers: {
  2202.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2203.         Referer: pageUrl || (typeof ai.xhr === 'function' ? ai.xhr() : url),
  2204.       },
  2205.       onprogress: Remoting.getImageProgress,
  2206.     });
  2207.     App.setBar(false);
  2208.     const type = Remoting.guessMimeType(response);
  2209.     let b = response.response;
  2210.     if (b.type !== type)
  2211.       b = b.slice(0, b.size, type);
  2212.     return ai.xhr === 'data' ?
  2213.       Remoting.blobToDataUrl(b) :
  2214.       URL.createObjectURL(b);
  2215.   }
  2216.  
  2217.   static getImageProgress(e) {
  2218.     if (!ai.bufferingBar && Date.now() - ai.bufferingStart > 3000 && e.loaded / e.total < 0.5)
  2219.       ai.bufferingBar = true;
  2220.     if (ai.bufferingBar) {
  2221.       const pct = e.loaded / e.total * 100 | 0;
  2222.       const size = e.total / 1024 | 0;
  2223.       App.setBar(`${pct}% of ${size} kiB`, 'xhr');
  2224.     }
  2225.   }
  2226.  
  2227.   static async findRedirect() {
  2228.     try {
  2229.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2230.         method: 'HEAD',
  2231.         headers: {
  2232.           'Referer': location.href.split('#', 1)[0],
  2233.         },
  2234.       });
  2235.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2236.       if (!info || !info.url)
  2237.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2238.       Object.assign(ai, info);
  2239.       Popup.startSingle();
  2240.     } catch (e) {
  2241.       App.handleError(e);
  2242.     }
  2243.   }
  2244.  
  2245.   static async saveFile() {
  2246.     let url = ai.popup.src || ai.popup.currentSrc;
  2247.     let name = Remoting.getFileName(ai.imageUrl || url);
  2248.     if (!name.includes('.'))
  2249.       name += '.jpg';
  2250.     try {
  2251.       if (!url.startsWith('blob:') && !url.startsWith('data:')) {
  2252.         const {response} = await Remoting.gmXhr(url, {
  2253.           responseType: 'blob',
  2254.           headers: {'Referer': url},
  2255.         });
  2256.         url = URL.createObjectURL(response);
  2257.         setTimeout(() => URL.revokeObjectURL(url), 1000);
  2258.       }
  2259.       $create('a', {href: url, download: name})
  2260.         .dispatchEvent(new MouseEvent('click'));
  2261.     } catch (e) {
  2262.       App.setBar(`Could not download ${name}.`, 'error');
  2263.     }
  2264.   }
  2265.  
  2266.   static getFileName(url) {
  2267.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2268.   }
  2269.  
  2270.   static blobToDataUrl(blob) {
  2271.     return new Promise((resolve, reject) => {
  2272.       const fr = new FileReader();
  2273.       fr.onload = () => resolve(fr.result);
  2274.       fr.onerror = reject;
  2275.       fr.readAsDataURL(blob);
  2276.     });
  2277.   }
  2278.  
  2279.   static guessMimeType({responseHeaders, finalUrl}) {
  2280.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2281.         !RegExp.$1.includes('text/plain'))
  2282.       return RegExp.$1;
  2283.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2284.     switch (ext.toLowerCase()) {
  2285.       case 'bmp': return 'image/bmp';
  2286.       case 'gif': return 'image/gif';
  2287.       case 'jpe': return 'image/jpeg';
  2288.       case 'jpeg': return 'image/jpeg';
  2289.       case 'jpg': return 'image/jpeg';
  2290.       case 'mp4': return 'video/mp4';
  2291.       case 'png': return 'image/png';
  2292.       case 'svg': return 'image/svg+xml';
  2293.       case 'tif': return 'image/tiff';
  2294.       case 'tiff': return 'image/tiff';
  2295.       case 'webm': return 'video/webm';
  2296.       default: return 'application/octet-stream';
  2297.     }
  2298.   }
  2299.  
  2300.   static findFileUrl(n, url) {
  2301.     const base = $('base[href]', n.ownerDocument);
  2302.     const path =
  2303.       n.getAttribute('src') ||
  2304.       n.getAttribute('data-m4v') ||
  2305.       n.getAttribute('href') ||
  2306.       n.getAttribute('content') ||
  2307.       /https?:\/\/[./a-z0-9_+%-]+\.(jpe?g|gif|png|svg|webm|mp4)/i.exec(n.outerHTML) &&
  2308.         RegExp.lastMatch;
  2309.     return path ? Util.rel2abs(path.trim(), base ? base.getAttribute('href') : url) : false;
  2310.   }
  2311. }
  2312.  
  2313. class Util {
  2314.  
  2315.   static addStyle(name, css) {
  2316.     const id = `${PREFIX}style:${name}`;
  2317.     const el = doc.getElementById(id) ||
  2318.                css && $create('style', {id});
  2319.     if (!el)
  2320.       return;
  2321.     if (el.textContent !== css)
  2322.       el.textContent = css;
  2323.     if (el.parentElement !== doc.head)
  2324.       doc.head.appendChild(el);
  2325.     return el;
  2326.   }
  2327.  
  2328.   static deepEqual(a, b) {
  2329.     if (typeof a !== typeof b)
  2330.       return false;
  2331.     if (!a || !b || typeof a !== 'object')
  2332.       return a === b;
  2333.     if (Array.isArray(a))
  2334.       return Array.isArray(b) &&
  2335.              a.length === b.length &&
  2336.              a.every((v, i) => Util.deepEqual(v, b[i]));
  2337.     const keys = Object.keys(a);
  2338.     return keys.length === Object.keys(b).length &&
  2339.            keys.every(k => Util.deepEqual(a[k], b[k]));
  2340.   }
  2341.  
  2342.   static findScale(url, parent) {
  2343.     const imgs = $$('img, video', parent);
  2344.     for (let i = imgs.length, img; (img = imgs[--i]);) {
  2345.       if ((img.src || img.currentSrc) !== url)
  2346.         continue;
  2347.       const scaleX = (img.naturalWidth || img.videoWidth) / img.offsetWidth;
  2348.       const scaleY = (img.naturalHeight || img.videoHeight) / img.offsetHeight;
  2349.       const s = Math.max(scaleX, scaleY);
  2350.       if (isFinite(s))
  2351.         return s;
  2352.     }
  2353.   }
  2354.  
  2355.   static forceLayout(node) {
  2356.     // eslint-disable-next-line no-unused-expressions
  2357.     node.clientHeight;
  2358.   }
  2359.  
  2360.   static formatError(e, rule) {
  2361.     let {message} = e;
  2362.     if (!message) {
  2363.       if (e.readyState)
  2364.         message = 'Request failed.';
  2365.       else if (e.type === 'error')
  2366.         message = "File can't be displayed." + (
  2367.           $('div[bgactive*="flashblock"]', doc) ?
  2368.             ' Check Flashblock settings.' :
  2369.             '');
  2370.       else
  2371.         message = e;
  2372.     }
  2373.     const m = [
  2374.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2375.       ['', 'font-weight:normal;color:unset'],
  2376.     ];
  2377.     if (rule.u)
  2378.       m.push(['Url simple match: %o', rule.u]);
  2379.     if (rule.r)
  2380.       m.push(['RegExp match: %o', rule.r]);
  2381.     if (ai.url)
  2382.       m.push(['URL: %s', ai.url]);
  2383.     if (ai.imageUrl && ai.imageUrl !== ai.url)
  2384.       m.push(['File: %s', ai.imageUrl]);
  2385.     m.push(['Node: %o', ai.node]);
  2386.     return {
  2387.       message,
  2388.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2389.       consoleArgs: m.map(([, v]) => v),
  2390.     };
  2391.   }
  2392.  
  2393.   static lazyGetRect(obj, node, selector) {
  2394.     return Object.defineProperty(obj, 'rect', {
  2395.       configurable: true,
  2396.       get() {
  2397.         const value = Util.rect(node, selector);
  2398.         Object.defineProperty(obj, 'rect', {value, configurable: true});
  2399.         return value;
  2400.       },
  2401.     });
  2402.   }
  2403.  
  2404.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2405.   static maybeDecodeURL(url) {
  2406.     if (!url)
  2407.       return url;
  2408.     const iPct = url.indexOf('%');
  2409.     const iColon = url.indexOf(':');
  2410.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2411.       decodeURIComponent(url) :
  2412.       url;
  2413.   }
  2414.  
  2415.   static newFunction(...args) {
  2416.     try {
  2417.       return App.NOP || new Function(...args);
  2418.     } catch (e) {
  2419.       if (!e.message.includes('unsafe-eval'))
  2420.         throw e;
  2421.       App.NOP = () => {};
  2422.       return App.NOP;
  2423.     }
  2424.   }
  2425.  
  2426.   static rect(node, selector) {
  2427.     let n = selector && node.closest(selector);
  2428.     if (n)
  2429.       return n.getBoundingClientRect();
  2430.     const nested = node.getElementsByTagName('*');
  2431.     let maxArea = 0;
  2432.     let maxBounds;
  2433.     n = node;
  2434.     for (let i = 0; n; n = nested[i++]) {
  2435.       const bounds = n.getBoundingClientRect();
  2436.       const area = bounds.width * bounds.height;
  2437.       if (area > maxArea) {
  2438.         maxArea = area;
  2439.         maxBounds = bounds;
  2440.         node = n;
  2441.       }
  2442.     }
  2443.     return maxBounds;
  2444.   }
  2445.  
  2446.   static rel2abs(rel, abs) {
  2447.     if (rel.startsWith('data:'))
  2448.       return rel;
  2449.     const rx = /^([a-z]+:)\/\//;
  2450.     if (rx.test(rel))
  2451.       return rel;
  2452.     if (!rx.test(abs))
  2453.       return;
  2454.     if (rel.indexOf('//') === 0)
  2455.       return RegExp.$1 + rel;
  2456.     if (rel[0] === '/')
  2457.       return abs.substr(0, abs.indexOf('/', RegExp.lastMatch.length)) + rel;
  2458.     return abs.substr(0, abs.lastIndexOf('/')) + '/' + rel;
  2459.   }
  2460.  
  2461.   static suppressHoverTooltip() {
  2462.     for (const node of [
  2463.       ai.node.parentNode,
  2464.       ai.node,
  2465.       ai.node.firstElementChild,
  2466.     ]) {
  2467.       const t = (node || 0).title;
  2468.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2469.         ai.tooltip = {node, text: t};
  2470.         node.title = '';
  2471.         break;
  2472.       }
  2473.     }
  2474.   }
  2475.  
  2476.   static tabFixUrl() {
  2477.     return `data:text/html;charset=utf8,
  2478.       <style>
  2479.         body {
  2480.           margin: 0;
  2481.           padding: 0;
  2482.           background: #222;
  2483.         }
  2484.         .fit {
  2485.           overflow: hidden
  2486.         }
  2487.         .fit > img {
  2488.           max-width: 100vw;
  2489.           max-height: 100vh;
  2490.         }
  2491.         body > img {
  2492.           margin: auto;
  2493.           position: absolute;
  2494.           left: 0;
  2495.           right: 0;
  2496.           top: 0;
  2497.           bottom: 0;
  2498.         }
  2499.       </style>
  2500.       <body class=fit>
  2501.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2502.       </body>
  2503.     `.replace(/\n\s*/g, '').replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2504.   }
  2505. }
  2506.  
  2507. function setup({rule} = {}) {
  2508.   const MPIV_BASE_URL = 'https://w9p.co/userscripts/mpiv/';
  2509.   const SETUP_ID = `${PREFIX}setup`;
  2510.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2511.   let div = doc.getElementById(SETUP_ID);
  2512.   let root = div && div.shadowRoot;
  2513.   let {blankRuleElement} = setup;
  2514.   /** @type NodeList */
  2515.   const UI = new Proxy({}, {
  2516.     get(_, id) {
  2517.       return root.getElementById(id);
  2518.     },
  2519.   });
  2520.   if (!rule || !div)
  2521.     init(new Config({save: true}));
  2522.   if (rule)
  2523.     installRule(rule);
  2524.  
  2525.   function closeSetup(event) {
  2526.     if (event && this.id !== 'x') {
  2527.       cfg = collectConfig({save: true, clone: this.id === 'apply'});
  2528.       Ruler.init();
  2529.       if (this.id === 'apply')
  2530.         return;
  2531.     }
  2532.     const el = doc.getElementById(SETUP_ID);
  2533.     el && el.remove();
  2534.   }
  2535.  
  2536.   function collectConfig({save, clone} = {}) {
  2537.     const delay = parseInt(UI.delay.value);
  2538.     const scale = parseFloat(UI.scale.value.replace(',', '.'));
  2539.     let data = {
  2540.       css: UI.css.value.trim(),
  2541.       delay: !isNaN(delay) && delay >= 0 ? delay : undefined,
  2542.       hosts: collectRules(),
  2543.       scale: !isNaN(scale) ? Math.max(1, scale) : undefined,
  2544.       scales: UI.scales.value
  2545.         .trim()
  2546.         .split(/[,;]*\s+/)
  2547.         .map(x => x.replace(',', '.'))
  2548.         .filter(x => !isNaN(parseFloat(x))),
  2549.       start: UI.start.value,
  2550.       zoom: UI.zoom.value,
  2551.       zoomOut: UI.zoomOut.value,
  2552.     };
  2553.     for (const el of $$('[type="checkbox"]', root))
  2554.       data[el.id] = el.checked;
  2555.     if (clone)
  2556.       data = JSON.parse(JSON.stringify(data));
  2557.     return new Config({data, save});
  2558.   }
  2559.  
  2560.   function collectRules() {
  2561.     return [...UI.rules.children]
  2562.       .map(el => [el.value.trim(), el[RULE]])
  2563.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2564.       .map(([s, json]) => json || s)
  2565.       .filter(Boolean);
  2566.   }
  2567.  
  2568.   function exportSettings(e) {
  2569.     dropEvent(e);
  2570.     const txt = $create('textarea', {
  2571.       style: 'opacity:0; position:absolute',
  2572.       value: JSON.stringify(collectConfig(), null, '  '),
  2573.     });
  2574.     root.appendChild(txt);
  2575.     txt.select();
  2576.     txt.focus();
  2577.     document.execCommand('copy');
  2578.     e.target.focus();
  2579.     txt.remove();
  2580.     UI.exportNotification.hidden = false;
  2581.     setTimeout(() => (UI.exportNotification.hidden = true), 1000);
  2582.   }
  2583.  
  2584.   function importSettings(e) {
  2585.     dropEvent(e);
  2586.     const s = prompt('Paste settings:');
  2587.     if (s)
  2588.       init(new Config({data: s}));
  2589.   }
  2590.  
  2591.   function checkRule({target: el}) {
  2592.     let json, error;
  2593.     const prev = el.previousElementSibling;
  2594.     if (el.value) {
  2595.       json = Ruler.parse(el.value);
  2596.       error = json instanceof Error && (json.message || String(json));
  2597.       if (!prev)
  2598.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2599.     } else if (prev) {
  2600.       prev.focus();
  2601.       el.remove();
  2602.     }
  2603.     el[RULE] = !error && json;
  2604.     el.title = error || '';
  2605.     el.setCustomValidity(error || '');
  2606.   }
  2607.  
  2608.   function focusRule({type, target: el, relatedTarget: from}) {
  2609.     if (el === this)
  2610.       return;
  2611.     if (type === 'paste') {
  2612.       setTimeout(() => focusRule.call(this, {target: el}));
  2613.       return;
  2614.     }
  2615.     if (el[RULE])
  2616.       el.value = Ruler.format(el[RULE], {expand: true});
  2617.     const h = clamp(el.scrollHeight, 15, div.clientHeight / 4);
  2618.     if (h > el.offsetHeight)
  2619.       el.style.minHeight = h + 'px';
  2620.     if (!this.contains(from))
  2621.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2622.     if (from) {
  2623.       from.style.minHeight = '';
  2624.       if (from[RULE])
  2625.         from.value = Ruler.format(from[RULE]);
  2626.     }
  2627.   }
  2628.  
  2629.   function installRule(rule) {
  2630.     const inputs = UI.rules.children;
  2631.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2632.     if (!el) {
  2633.       el = inputs[0];
  2634.       el[RULE] = rule;
  2635.       el.value = Ruler.format(rule);
  2636.       el.hidden = false;
  2637.       const i = Math.max(0, collectRules().indexOf(rule));
  2638.       inputs[i].insertAdjacentElement('afterend', el);
  2639.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2640.     }
  2641.     const rect = el.getBoundingClientRect();
  2642.     if (rect.bottom < 0 ||
  2643.         rect.bottom > el.parentNode.offsetHeight)
  2644.       el.scrollIntoView();
  2645.     el.classList.add('highlight');
  2646.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2647.     el.focus();
  2648.   }
  2649.  
  2650.   function init(config) {
  2651.     closeSetup();
  2652.     div = $create('div', {
  2653.       id: SETUP_ID,
  2654.       // prevent the main page from interpreting key presses in inputs as hotkeys
  2655.       // which may happen since it sees only the outer <div> in the event |target|
  2656.       contentEditable: true,
  2657.     });
  2658.     root = div.attachShadow({mode: 'open'});
  2659.     root.innerHTML = `
  2660. <style>
  2661.   :host {
  2662.     all: initial !important;
  2663.     position: fixed !important;
  2664.     z-index: 2147483647 !important;
  2665.     top: 20px !important;
  2666.     right: 20px !important;
  2667.     padding: 20px 30px !important;
  2668.     color: #000 !important;
  2669.     background: #eee !important;
  2670.     box-shadow: 5px 5px 25px 2px #000 !important;
  2671.     width: 500px !important;
  2672.     border: 1px solid black !important;
  2673.     display: flex !important;
  2674.     flex-direction: column !important;
  2675.   }
  2676.   main {
  2677.     font: 12px/15px sans-serif;
  2678.   }
  2679.   ul {
  2680.     max-height: calc(100vh - 200px);
  2681.     margin: 10px 0 15px 0;
  2682.     padding: 0;
  2683.     list-style: none;
  2684.   }
  2685.   li {
  2686.     margin: 0;
  2687.     padding: .25em 0;
  2688.   }
  2689.   li.options {
  2690.     display: flex;
  2691.     align-items: center;
  2692.     flex-wrap: wrap;
  2693.   }
  2694.   label {
  2695.     display: inline-flex;
  2696.     align-items: center;
  2697.   }
  2698.   label:not(:last-child) {
  2699.     margin-right: 1em;
  2700.   }
  2701.   label > :not(span) {
  2702.     margin-right: .25em;
  2703.   }
  2704.   label > :not(span):not(:first-child) {
  2705.     margin-left: .5em;
  2706.   }
  2707.   input:first-child {
  2708.     margin-left: 0;
  2709.   }
  2710.   input, select {
  2711.     min-height: 1.6em;
  2712.     box-sizing: border-box;
  2713.   }
  2714.   textarea {
  2715.     flex: 1;
  2716.     resize: vertical;
  2717.     margin: 1px 0;
  2718.     font: 11px/1.25 Consolas, monospace;
  2719.   }
  2720.   textarea:invalid {
  2721.     background-color: #f002;
  2722.     border-color: #800;
  2723.   }
  2724.   code {
  2725.     font-weight: bold;
  2726.   }
  2727.   a {
  2728.     text-decoration: none;
  2729.   }
  2730.   a:hover {
  2731.     text-decoration: underline;
  2732.   }
  2733.   button {
  2734.     padding: .2em 1em;
  2735.     margin: 0 1em;
  2736.   }
  2737.   .column {
  2738.     display: flex;
  2739.     flex-direction: column;
  2740.   }
  2741.   .highlight {
  2742.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  2743.     animation-fill-mode: both;
  2744.   }
  2745.   #rules textarea {
  2746.     word-break: break-all;
  2747.   }
  2748.   #x {
  2749.     position: absolute;
  2750.     top: 0;
  2751.     right: 0;
  2752.     padding: 4px 8px;
  2753.     cursor: pointer;
  2754.     user-select: none;
  2755.   }
  2756.   #x:hover {
  2757.     background-color: #8884;
  2758.   }
  2759.   @keyframes fade-in {
  2760.     from { background-color: deepskyblue }
  2761.     to {}
  2762.   }
  2763.   @media (prefers-color-scheme: dark) {
  2764.     :host {
  2765.       color: #aaa !important;
  2766.       background: #333 !important;
  2767.     }
  2768.     a {
  2769.       color: deepskyblue;
  2770.     }
  2771.     textarea, input, select {
  2772.       background: #111;
  2773.       color: #BBB;
  2774.       border-color: #555;
  2775.     }
  2776.     input[type="checkbox"] {
  2777.       filter: invert(1);
  2778.     }
  2779.   }
  2780. </style>
  2781. <main>
  2782.   <a href="${MPIV_BASE_URL}">${GM_info.script.name}</a>
  2783.   <div id=x>x</div>
  2784.   <ul class=column>
  2785.     <li class=options>
  2786.       <label>
  2787.         <span>Popup:</span>
  2788.         <select id=start>
  2789.           <option value=auto>automatically
  2790.           <option value=context>right click or ctrl
  2791.           <option value=ctrl>ctrl
  2792.         </select>
  2793.       </label>
  2794.       <label>
  2795.         <span>after</span>
  2796.         <input id=delay type=number min=0 max=10000 step=50 style="width: 4em">
  2797.         <span>ms</span>
  2798.       </label>
  2799.       <label>
  2800.         <input type=checkbox id=preload>
  2801.         <span>Start preloading immediately</span>
  2802.       </label>
  2803.     </li>
  2804.     <li class=options>
  2805.       <label>
  2806.         <span>Zoom:</span>
  2807.         <select id=zoom>
  2808.           <option value=context>right click or shift
  2809.           <option value=wheel>wheel up or shift
  2810.           <option value=shift>shift
  2811.           <option value=auto>automatically
  2812.         </select>
  2813.       </label>
  2814.       <label>
  2815.         <span>When zoomed out completely</span>
  2816.         <select id=zoomOut>
  2817.           <option value=stay>stay in zoom mode
  2818.           <option value=auto>stay if still hovered
  2819.           <option value=close>close popup
  2820.         </select>
  2821.       </label>
  2822.     </li>
  2823.     <li class=options>
  2824.       <label>
  2825.         <span>Only show popup over scaled-down image when natural size is</span>
  2826.         <input id=scale type=number min=1 max=100 step=.05 style="width: 4em;">
  2827.         <span>times larger</span>
  2828.       </label>
  2829.     </li>
  2830.     <li class=options>
  2831.       <label>
  2832.         <span>Custom scale factors:</span>
  2833.         <input id=scales style="width: 18em" placeholder="${Config.DEFAULTS.scales.join(' ')}">
  2834.         <span title="${`
  2835.           0 = fit to window
  2836.           0! = same as 0 but also removes smaller values
  2837.           * after value marks default zoom factor, for example: 1*
  2838.           Values smaller than non-zoomed size are ignored.
  2839.         `.trim().replace(/\n\s+/g, '\n')}" style="cursor:help">(?)</span>
  2840.       </label>
  2841.     </li>
  2842.     <li class=options>
  2843.       <label><input type=checkbox id=center><span>Always centered</span></label>
  2844.       <label><input type=checkbox id=imgtab><span>Run in image tabs</span></label>
  2845.       <label title="Disable only if you spoof the HTTP headers yourself">
  2846.         <input type=checkbox id=xhr>
  2847.         <span>Anti-hotlinking workaround</span>
  2848.       </label>
  2849.       <label>
  2850.         <input type=checkbox id=globalStatus>
  2851.         <span>Expose status on &lt;html&gt; node (note: may cause noticeable slowdown)</small>
  2852.       </label>
  2853.     </li>
  2854.     <li>
  2855.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>
  2856.       e.g. <code>#mpiv-popup.mpiv-show { animation: none }</code>
  2857.       <div class=column>
  2858.         <textarea id=css spellcheck=false></textarea>
  2859.       </div>
  2860.     </li>
  2861.     <li style="display: flex; justify-content: space-between;">
  2862.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  2863.       <div style="white-space: nowrap">
  2864.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  2865.         in "d" value, for example <code>"d": "!foo.com"</code>
  2866.       </div>
  2867.       <div>
  2868.         <input id=search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  2869.       </div>
  2870.     </li>
  2871.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto;
  2872.                padding-left: 3px; padding-right: 3px; ">
  2873.       <div id="rules" class="column">
  2874.         <textarea rows="1" spellcheck="false"></textarea>
  2875.       </div>
  2876.     </li>
  2877.     <li>
  2878.       <div hidden id=installLoading>Loading...</div>
  2879.       <div hidden id=installHint>Double-click the rule (or select and press Enter) to add it.
  2880.                                  Click OK when done.</div>
  2881.       <a href="${MPIV_BASE_URL}more_host_rules.html" id=install>Install rule from repository...</a>
  2882.     </li>
  2883.   </ul>
  2884.   <div style="text-align:center">
  2885.     <button id=ok accesskey=s>Save</button>
  2886.     <button id=apply accesskey=a>Apply</button>
  2887.     <button id=import style="margin-right: 0">Import</button>
  2888.     <button id=export style="margin-left: 0">Export</button>
  2889.     <button id=cancel>Cancel</button>
  2890.     <div id=exportNotification hidden style="color: green; font-weight: bold;
  2891.       position: absolute; bottom: 2px; left: 0; right: 0;">Copied to clipboard.</div>
  2892.   </div>
  2893. </main>
  2894.     `;
  2895.     // rules
  2896.     const rules = UI.rules;
  2897.     rules.addEventListener('input', checkRule);
  2898.     rules.addEventListener('focusin', focusRule);
  2899.     rules.addEventListener('paste', focusRule);
  2900.     blankRuleElement =
  2901.       setup.blankRuleElement =
  2902.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2903.     for (const rule of config.hosts || []) {
  2904.       const el = blankRuleElement.cloneNode();
  2905.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2906.       rules.appendChild(el);
  2907.       checkRule({target: el});
  2908.     }
  2909.     // search rules
  2910.     const search = UI.search;
  2911.     search.oninput = () => {
  2912.       setup.search = search.value;
  2913.       const s = search.value.toLowerCase();
  2914.       for (const el of rules.children)
  2915.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2916.     };
  2917.     search.value = setup.search || '';
  2918.     if (search.value)
  2919.       search.oninput();
  2920.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2921.     // which may happen since it sees only the outer <div> in the event |target|
  2922.     root.addEventListener('keydown', e =>
  2923.       !e.altKey && !e.ctrlKey && !e.metaKey && e.stopPropagation(), true);
  2924.     UI.apply.onclick = UI.cancel.onclick = UI.ok.onclick = UI.x.onclick = closeSetup;
  2925.     UI.css.value = config.css;
  2926.     UI.delay.value = config.delay;
  2927.     UI.export.onclick = exportSettings;
  2928.     UI.import.onclick = importSettings;
  2929.     UI.install.onclick = setupRuleInstaller;
  2930.     UI.scale.value = config.scale;
  2931.     UI.scales.value = config.scales.join(' ');
  2932.     UI.start.value = config.start;
  2933.     UI.start.onchange = function () {
  2934.       UI.delay.closest('label').hidden =
  2935.         UI.preload.closest('label').hidden =
  2936.           this.value !== 'auto';
  2937.     };
  2938.     UI.start.onchange();
  2939.     UI.xhr.onclick = ({target: el}) => el.checked || confirm(el.closest('[title]').title);
  2940.     UI.zoom.value = config.zoom;
  2941.     UI.zoomOut.value = config.zoomOut;
  2942.     for (const el of $$('[type="checkbox"]', root))
  2943.       el.checked = config[el.id];
  2944.     for (const el of $$('a[href^="http"]', root)) {
  2945.       el.target = '_blank';
  2946.       el.rel = 'noreferrer noopener external';
  2947.     }
  2948.     doc.body.appendChild(div);
  2949.     requestAnimationFrame(() => {
  2950.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, div.clientHeight / 4) + 'px';
  2951.     });
  2952.   }
  2953. }
  2954.  
  2955. async function setupRuleInstaller(e) {
  2956.   dropEvent(e);
  2957.   const parent = this.parentElement;
  2958.   parent.children.installLoading.hidden = false;
  2959.   this.remove();
  2960.   let rules;
  2961.  
  2962.   try {
  2963.     rules = extractRules((await Remoting.getDoc(this.href)).doc);
  2964.     const selector = $create('select', {
  2965.       size: 8,
  2966.       style: 'width: 100%',
  2967.       ondblclick: e => e.target !== selector && maybeSetup(e),
  2968.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  2969.     });
  2970.     selector.append(...rules.map(renderRule));
  2971.     selector.selectedIndex = findMatchingRuleIndex();
  2972.     // remove "name" since the installed rules don't need it
  2973.     for (const r of rules)
  2974.       delete r.name;
  2975.     parent.children.installLoading.remove();
  2976.     parent.children.installHint.hidden = false;
  2977.     parent.appendChild(selector);
  2978.   } catch (e) {
  2979.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  2980.   }
  2981.  
  2982.   function extractRules(doc) {
  2983.     const code = $('script', doc).textContent;
  2984.     // sort by name
  2985.     return JSON.parse(code.match(/var\s+rules\s*=\s*(\[.+]);?[\r\n]/)[1])
  2986.       .filter(r => !r.d || hostname.includes(r.d))
  2987.       .sort((a, b) =>
  2988.         (a = a.name.toLowerCase()) < (b = b.name.toLowerCase()) ? -1 :
  2989.           a > b ? 1 :
  2990.             0);
  2991.   }
  2992.  
  2993.   function findMatchingRuleIndex() {
  2994.     // get the core part of the current domain that's not "www", "m", etc.
  2995.     const h = hostname.split('.');
  2996.     const core = h[0] === 'www' || h.length > 2 && h[0].length === 1 ? h[1] : h[0];
  2997.     // find a rule matching the domain core
  2998.     return rules.findIndex(r =>
  2999.       r.name.toLowerCase().includes(core) ||
  3000.       r.d && hostname.includes(r.d));
  3001.   }
  3002.  
  3003.   function renderRule(r) {
  3004.     const {name, ...copy} = r;
  3005.     return $create('option', {
  3006.       textContent: name,
  3007.       title: Ruler.format(copy, {expand: true})
  3008.         .replace(/^{|\s*}$/g, '')
  3009.         .split('\n')
  3010.         .slice(0, 12)
  3011.         .map(renderTitleLine)
  3012.         .filter(Boolean)
  3013.         .join('\n'),
  3014.     });
  3015.   }
  3016.  
  3017.   function renderTitleLine(line, i, arr) {
  3018.     return (
  3019.       // show ... on 10th line if there are more lines
  3020.       i === 9 && arr.length > 10 ? '...' :
  3021.         i > 10 ? '' :
  3022.           // truncate to 100 chars
  3023.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3024.             // strip the leading space
  3025.             .replace(/^\s/, ''));
  3026.   }
  3027.  
  3028.   function maybeSetup(e) {
  3029.     if (!e.altKey && !e.ctrlKey && !e.shiftKey && !e.metaKey)
  3030.       setup({rule: rules[e.currentTarget.selectedIndex]});
  3031.   }
  3032. }
  3033.  
  3034. App.init();