☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2020-01-09 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     1.0.12
  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. class App {
  55.  
  56.   static init() {
  57.     /** @type mpiv.Config */
  58.     Config.DEFAULTS = Object.assign(Object.create(null), {
  59.       center: false,
  60.       css: '',
  61.       delay: 500,
  62.       globalStatus: false,
  63.       // prefer ' inside rules because " will be displayed as \"
  64.       hosts: [{
  65.         name: 'No popup for YouTube thumbnails',
  66.         d: 'www.youtube.com',
  67.         e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  68.         s: '',
  69.       }, {
  70.         name: 'No popup for SVG/PNG icons',
  71.         d: '',
  72.         e: 'img[src*="icon"]',
  73.         r: /\/\/[^/]+\/.*\bicons?\b.*\.(?:png|svg)/,
  74.         s: '',
  75.       }],
  76.       imgtab: false,
  77.       preload: false,
  78.       scale: 1.25,
  79.       scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 5, 8, 16],
  80.       start: 'auto',
  81.       version: 6,
  82.       xhr: true,
  83.       zoom: 'context',
  84.       zoomOut: 'auto',
  85.     });
  86.     cfg = new Config({save: true});
  87.     App.isImageTab = doc.images.length === 1 &&
  88.                      doc.images[0].parentNode === doc.body &&
  89.                      !doc.links.length;
  90.     App.enabled = cfg.imgtab || !App.isImageTab;
  91.  
  92.     GM_registerMenuCommand('MPIV: configure', setup);
  93.     doc.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  94.  
  95.     if (isGoogleDomain && doc.getElementById('main'))
  96.       doc.getElementById('main').addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  97.  
  98.     if (trustedDomains.includes(hostname)) {
  99.       doc.addEventListener('click', e => {
  100.         const el = e.target.closest('blockquote, code, pre');
  101.         const text = el && el.textContent.trim();
  102.         let rule;
  103.         if (text && e.button === 0 &&
  104.             /^\s*{\s*"\w+"\s*:[\s\S]+}\s*$/.test(text) &&
  105.             (rule = tryCatch(JSON.parse, text))) {
  106.           setup({rule});
  107.           Events.drop(e);
  108.         }
  109.       });
  110.     }
  111.  
  112.     window.addEventListener('load', () => {
  113.       if ($('iframe, frame'))
  114.         window.addEventListener('message', App.onMessageParent);
  115.     }, {once: true});
  116.   }
  117.  
  118.   /** @param {MessageEvent} e */
  119.   static onMessageParent(e) {
  120.     if (typeof e.data === 'string' && e.data.startsWith(POSTMSG_PREFIX)) {
  121.       for (const el of $$('iframe, frame')) {
  122.         if (el.contentWindow === e.source) {
  123.           const r = el.getBoundingClientRect();
  124.           const w = clamp(r.width, 0, innerWidth - r.left);
  125.           const h = clamp(r.height, 0, innerHeight - r.top);
  126.           e.source.postMessage(`${POSTMSG_PREFIX}${w}:${h}`, '*');
  127.         }
  128.       }
  129.     }
  130.   }
  131.  
  132.   /** @param {MessageEvent} e */
  133.   static onMessageChild(e) {
  134.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(POSTMSG_PREFIX)) {
  135.       const [width, height] = e.data.slice(POSTMSG_PREFIX.length).split(':').map(parseFloat);
  136.       if (width && height) {
  137.         ai.view = {width, height};
  138.         window.removeEventListener('message', App.onMessageChild);
  139.       }
  140.     }
  141.   }
  142.  
  143.   static activate(info, event) {
  144.     const force = event.ctrlKey;
  145.     if (!force) {
  146.       const scale = Util.findScale(info.url, info.node.parentNode);
  147.       if (scale && scale < cfg.scale)
  148.         return;
  149.     }
  150.     if (ai.node)
  151.       App.deactivate();
  152.     ai = info;
  153.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  154.     ai.view = {
  155.       width: view.clientWidth,
  156.       height: view.clientHeight,
  157.     };
  158.     if (window !== top) {
  159.       window.addEventListener('message', App.onMessageChild);
  160.       parent.postMessage(POSTMSG_PREFIX + 'getDimensions', '*');
  161.     }
  162.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  163.     Util.suppressHoverTooltip();
  164.     App.setListeners();
  165.     App.updateMouse(event);
  166.     if (force) {
  167.       Popup.start();
  168.     } else if (cfg.start === 'auto' && !ai.rule.manual) {
  169.       Popup.schedule();
  170.     } else {
  171.       App.setStatus('ready');
  172.     }
  173.   }
  174.  
  175.   static checkProgress({start} = {}) {
  176.     const p = ai.popup;
  177.     if (p) {
  178.       ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && 800;
  179.       ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && 1200;
  180.       if (ai.nheight) {
  181.         App.updateProgress();
  182.         clearInterval(ai.timerProgress);
  183.         clearTimeout(ai.timerStatus);
  184.         return;
  185.       }
  186.     }
  187.     if (start)
  188.       ai.timerProgress = setInterval(App.checkProgress, 150);
  189.   }
  190.  
  191.   static deactivate({wait} = {}) {
  192.     clearTimeout(ai.timer);
  193.     clearTimeout(ai.timerStatus);
  194.     clearInterval(ai.timerProgress);
  195.     if (ai.req)
  196.       tryCatch.call(ai.req, ai.req.abort);
  197.     if (ai.tooltip)
  198.       ai.tooltip.node.title = ai.tooltip.text;
  199.     App.setStatus(false);
  200.     App.setBar(false);
  201.     App.setListeners(false);
  202.     Popup.destroy();
  203.     if (wait) {
  204.       App.enabled = false;
  205.       setTimeout(App.enable, 200);
  206.     }
  207.     ai = {rule: {}};
  208.   }
  209.  
  210.   static enable() {
  211.     App.enabled = true;
  212.   }
  213.  
  214.   static handleError(e, rule = ai.rule) {
  215.     const fe = Util.formatError(e, rule);
  216.     if (!rule || !ai.urls || !ai.urls.length)
  217.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  218.     if (cfg.xhr && !ai.xhr && isGoogleImages) {
  219.       ai.xhr = true;
  220.       Popup.startSingle();
  221.     } else if (ai.urls && ai.urls.length) {
  222.       ai.url = ai.urls.shift();
  223.       ai.url ?
  224.         Popup.startSingle() :
  225.         App.deactivate();
  226.     } else if (ai.node) {
  227.       App.setStatus('error');
  228.       App.setBar(fe.message, 'error');
  229.     }
  230.   }
  231.  
  232.   static setBar(label, className) {
  233.     let b = ai.bar;
  234.     if (typeof label !== 'string') {
  235.       b && b.remove();
  236.       ai.bar = null;
  237.       return;
  238.     }
  239.     if (!b)
  240.       b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  241.     App.updateStyles();
  242.     App.updateTitle();
  243.     App.updateBar();
  244.     b.innerHTML = label;
  245.     if (!b.parentNode) {
  246.       doc.body.appendChild(b);
  247.       Util.forceLayout(b);
  248.     }
  249.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  250.   }
  251.  
  252.   static setListeners(enable = true) {
  253.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  254.     const passive = enable ? PASSIVE : undefined;
  255.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  256.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  257.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  258.     onOff.call(doc, 'contextmenu', Events.onContext);
  259.     onOff.call(doc, 'keydown', Events.onKeyDown);
  260.     onOff.call(doc, 'keyup', Events.onKeyUp);
  261.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  262.   }
  263.  
  264.   static setStatus(status) {
  265.     if (!status && !cfg.globalStatus) {
  266.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  267.       return;
  268.     }
  269.     const prefix = cfg.globalStatus ? PREFIX : '';
  270.     const action = status && /^[+-]/.test(status) && status[0];
  271.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  272.     const el = cfg.globalStatus ? doc.documentElement :
  273.       name === 'edge' ? ai.popup :
  274.         ai.node;
  275.     if (!el)
  276.       return;
  277.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  278.     const oldValue = (el.getAttribute(attr) || '').trim();
  279.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  280.     switch (action) {
  281.       case '-':
  282.         cls.delete(name);
  283.         break;
  284.       case false:
  285.         for (const c of cls)
  286.           if (c.startsWith(prefix) && c !== name)
  287.             cls.delete(c);
  288.         // fallthrough to +
  289.       case '+':
  290.         if (name)
  291.           cls.add(name);
  292.         break;
  293.     }
  294.     const newValue = [...cls].join(' ');
  295.     if (newValue !== oldValue)
  296.       el.setAttribute(attr, newValue);
  297.   }
  298.  
  299.   static setStatusLoading(force) {
  300.     if (!force) {
  301.       clearTimeout(ai.timerStatus);
  302.       ai.timerStatus = setTimeout(App.setStatusLoading, SETTLE_TIME, true);
  303.     } else if (!ai.popupLoaded) {
  304.       App.setStatus('+loading');
  305.     }
  306.   }
  307.  
  308.   static toggleZoom() {
  309.     const p = ai.popup;
  310.     if (!p || !ai.scales || ai.scales.length < 2)
  311.       return;
  312.     ai.zoom = !ai.zoom;
  313.     ai.zoomed = true;
  314.     const z = ai.scales.indexOf(ai.zscale);
  315.     ai.scale = ai.scales[ai.zoom ? (z > 0 ? z : 1) : 0];
  316.     if (ai.zooming)
  317.       p.classList.add(`${PREFIX}zooming`);
  318.     Popup.move();
  319.     App.updateTitle();
  320.     App.setStatus(ai.zoom ? 'zoom' : false);
  321.     if (!ai.zoom)
  322.       App.updateFileInfo();
  323.     return ai.zoom;
  324.   }
  325.  
  326.   static updateBar() {
  327.     if (ai.timerBar)
  328.       return;
  329.     clearTimeout(ai.timerBar);
  330.     ai.bar.style.removeProperty('opacity');
  331.     ai.timerBar = setTimeout(() => {
  332.       ai.timerBar = 0;
  333.       if (ai.bar)
  334.         ai.bar.style.setProperty('opacity', 0);
  335.     }, 3000);
  336.   }
  337.  
  338.   static updateCaption(text, doc = document) {
  339.     switch (typeof ai.rule.c) {
  340.       case 'function':
  341.         // don't specify as a parameter's default value, instead get the html only when needed
  342.         if (text === undefined)
  343.           text = doc.documentElement.outerHTML;
  344.         ai.caption = ai.rule.c(text, doc, ai.node, ai.rule);
  345.         break;
  346.       case 'string': {
  347.         const el = $many(ai.rule.c, doc);
  348.         ai.caption = !el ? '' :
  349.           el.getAttribute('content') ||
  350.           el.getAttribute('title') ||
  351.           el.textContent;
  352.         break;
  353.       }
  354.       default: {
  355.         ai.caption = (ai.tooltip || 0).text || ai.node.alt || '';
  356.         if (ai.caption)
  357.           return;
  358.         const el = ai.node.closest('a[title], img[title], video[title]');
  359.         if (el && (ai.caption = el.title || ''))
  360.           return;
  361.         const url = ai.node.src || (ai.node.closest('[href]') || 0).href;
  362.         ai.caption = url ? Remoting.getFileName(url) : '';
  363.       }
  364.     }
  365.   }
  366.  
  367.   static updateFileInfo() {
  368.     const gi = ai.gItems;
  369.     if (gi) {
  370.       const item = gi[ai.gIndex];
  371.       let c = gi.length > 1 ? '[' + (ai.gIndex + 1) + '/' + gi.length + '] ' : '';
  372.       if (ai.gIndex === 0 && gi.title && (!item.desc || !safeIncludes(item.desc, gi.title)))
  373.         c += gi.title + (item.desc ? ' - ' : '');
  374.       if (item.desc)
  375.         c += item.desc;
  376.       App.setBar(c.trim() || ' ', 'gallery', true);
  377.     } else if ('caption' in ai) {
  378.       App.setBar(ai.caption, 'caption');
  379.     } else if (ai.tooltip) {
  380.       App.setBar(ai.tooltip.text, 'tooltip');
  381.     } else {
  382.       App.setBar(' ', 'info');
  383.     }
  384.   }
  385.  
  386.   static updateMouse(e) {
  387.     const cx = ai.clientX = e.clientX;
  388.     const cy = ai.clientY = e.clientY;
  389.     const r = ai.rect;
  390.     if (r)
  391.       ai.isOverRect =
  392.         cx < r.right + 2 &&
  393.         cx > r.left - 2 &&
  394.         cy < r.bottom + 2 &&
  395.         cy > r.top - 2;
  396.   }
  397.  
  398.   static updateProgress() {
  399.     if (ai.preloadStart) {
  400.       const wait = ai.preloadStart + cfg.delay - Date.now();
  401.       if (wait > 0) {
  402.         ai.timer = setTimeout(App.checkProgress, wait);
  403.         return;
  404.       }
  405.     }
  406.     if (ai.urls && ai.urls.length && Math.max(ai.nheight, ai.nwidth) < 130) {
  407.       App.handleError({type: 'error'});
  408.       return;
  409.     }
  410.     App.setStatus(false);
  411.     Util.forceLayout(ai.popup);
  412.     ai.popup.className = `${PREFIX}show`;
  413.     App.updateSpacing();
  414.     App.updateScales();
  415.     App.updateTitle();
  416.     Popup.move();
  417.     if (!ai.bar)
  418.       App.updateFileInfo();
  419.     ai.large = ai.nwidth > ai.popup.clientWidth + ai.mbw ||
  420.                ai.nheight > ai.popup.clientHeight + ai.mbh;
  421.     if (ai.large)
  422.       App.setStatus('large');
  423.     if (cfg.imgtab && App.isImageTab || cfg.zoom === 'auto')
  424.       App.toggleZoom();
  425.   }
  426.  
  427.   static updateScales() {
  428.     const scales = cfg.scales.length ? cfg.scales : Config.DEFAULTS.scales.slice();
  429.     const fit = Math.min(
  430.       (ai.view.width - ai.mbw - ai.outline * 2) / ai.nwidth,
  431.       (ai.view.height - ai.mbh - ai.outline * 2) / ai.nheight);
  432.     let cutoff = ai.scale = Math.min(1, fit);
  433.     ai.scales = [];
  434.     for (let i = scales.length; i--;) {
  435.       const scale = scales[i];
  436.       const val = parseFloat(scale) || fit;
  437.       const option = typeof scale === 'string' && scale.slice(-1);
  438.       if (option === '!')
  439.         cutoff = val;
  440.       if (option === '*')
  441.         ai.zscale = val;
  442.       if (val !== ai.scale)
  443.         ai.scales.push(val);
  444.     }
  445.     ai.scales = ai.scales
  446.       .filter(x => x >= cutoff)
  447.       .sort((a, b) => a - b);
  448.     ai.scales.unshift(ai.scale);
  449.   }
  450.  
  451.   static updateSpacing() {
  452.     const s = getComputedStyle(ai.popup);
  453.     ai.outline =
  454.       (parseFloat(s['outline-offset']) || 0) +
  455.       (parseFloat(s['outline-width']) || 0);
  456.     ai.pw =
  457.       (parseFloat(s['padding-left']) || 0) +
  458.       (parseFloat(s['padding-right']) || 0);
  459.     ai.ph =
  460.       (parseFloat(s['padding-top']) || 0) +
  461.       (parseFloat(s['padding-bottom']) || 0);
  462.     ai.mbw =
  463.       (parseFloat(s['margin-left']) || 0) +
  464.       (parseFloat(s['margin-right']) || 0) +
  465.       (parseFloat(s['border-left-width']) || 0) +
  466.       (parseFloat(s['border-right-width']) || 0);
  467.     ai.mbh =
  468.       (parseFloat(s['margin-top']) || 0) +
  469.       (parseFloat(s['margin-bottom']) || 0) +
  470.       (parseFloat(s['border-top-width']) || 0) +
  471.       (parseFloat(s['border-bottom-width']) || 0);
  472.   }
  473.  
  474.   static updateStyles() {
  475.     Util.addStyle('global', /*language=CSS*/ App.globalStyle || (App.globalStyle = `
  476.       #${PREFIX}bar {
  477.         position: fixed;
  478.         z-index: 2147483647;
  479.         left: 0;
  480.         right: 0;
  481.         top: 0;
  482.         opacity: 0;
  483.         transition: opacity 1s ease .25s;
  484.         text-align: center;
  485.         font-family: sans-serif;
  486.         font-size: 15px;
  487.         font-weight: bold;
  488.         background: #0005;
  489.         color: white;
  490.         padding: 4px 10px;
  491.         text-shadow: .5px .5px 2px #000;
  492.       }
  493.       #${PREFIX}bar.${PREFIX}show {
  494.         opacity: 1;
  495.       }
  496.       #${PREFIX}bar[data-zoom]::after {
  497.         content: " (" attr(data-zoom) ")";
  498.         opacity: .8;
  499.       }
  500.       #${PREFIX}popup.${PREFIX}show {
  501.         display: inline;
  502.       }
  503.       #${PREFIX}popup {
  504.         display: none;
  505.         border: none;
  506.         box-sizing: content-box;
  507.         position: fixed;
  508.         z-index: 2147483647;
  509.         margin: 0;
  510.         max-width: none;
  511.         max-height: none;
  512.         will-change: display, width, height, left, top;
  513.         cursor: none;
  514.         animation: .2s ${PREFIX}fadein both;
  515.       }
  516.       #${PREFIX}popup.${PREFIX}show {
  517.         box-shadow: 6px 6px 30px transparent;
  518.         transition: box-shadow .25s, background-color .25s;
  519.       }
  520.       #${PREFIX}popup.${PREFIX}show[loaded] {
  521.         box-shadow: 6px 6px 30px black;
  522.         background-color: white;
  523.       }
  524.       @keyframes ${PREFIX}fadein {
  525.         from { opacity: 0; }
  526.         to { opacity: 1; }
  527.       }
  528.       ${cfg.globalStatus ? `
  529.         .${PREFIX}loading:not(.${PREFIX}preloading) * {
  530.           cursor: wait !important;
  531.         }
  532.         .${PREFIX}edge #${PREFIX}popup {
  533.           cursor: default;
  534.         }
  535.         .${PREFIX}error * {
  536.           cursor: not-allowed !important;
  537.         }
  538.         .${PREFIX}ready *, .${PREFIX}large * {
  539.           cursor: zoom-in !important;
  540.         }
  541.         .${PREFIX}shift * {
  542.           cursor: default !important;
  543.         }
  544.       ` : `
  545.         [${STATUS_ATTR}~="loading"]:not([${STATUS_ATTR}~="preloading"]) {
  546.           cursor: wait !important;
  547.         }
  548.         #${PREFIX}popup[${STATUS_ATTR}~="edge"] {
  549.           cursor: default !important;
  550.         }
  551.         [${STATUS_ATTR}~="error"] {
  552.           cursor: not-allowed !important;
  553.         }
  554.         [${STATUS_ATTR}~="ready"],
  555.         [${STATUS_ATTR}~="large"] {
  556.           cursor: zoom-in !important;
  557.         }
  558.         [${STATUS_ATTR}~="shift"] {
  559.           cursor: default !important;
  560.         }
  561.       `}
  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 = `${Math.round(ai.scale * 100)}% - ${ai.nwidth} x ${ai.nheight} px`;
  571.     if (ai.bar.dataset.zoom !== zoom) {
  572.       ai.bar.dataset.zoom = zoom;
  573.       App.updateBar();
  574.     }
  575.   }
  576. }
  577.  
  578. class Config {
  579.   constructor({data: c = GM_getValue('cfg'), save}) {
  580.     if (typeof c === 'string')
  581.       c = tryCatch(JSON.parse, c);
  582.     if (typeof c !== 'object' || !c)
  583.       c = {};
  584.     const {DEFAULTS} = Config;
  585.     if (c.version !== DEFAULTS.version) {
  586.       if (typeof c.hosts === 'string')
  587.         c.hosts = c.hosts.split('\n')
  588.           .map(s => tryCatch(JSON.parse, s) || s)
  589.           .filter(Boolean);
  590.       if (c.close === true || c.close === false)
  591.         c.zoomOut = c.close ? 'auto' : 'stay';
  592.       for (const key in DEFAULTS)
  593.         if (typeof c[key] !== typeof DEFAULTS[key])
  594.           c[key] = DEFAULTS[key];
  595.       if (c.version === 3 && c.scales[0] === 0)
  596.         c.scales[0] = '0!';
  597.       for (const key in c)
  598.         if (!(key in DEFAULTS))
  599.           delete c[key];
  600.       c.version = DEFAULTS.version;
  601.       if (save)
  602.         GM_setValue('cfg', JSON.stringify(c));
  603.     }
  604.     if (cfg && (
  605.       cfg.css !== c.css ||
  606.       cfg.globalStatus !== c.globalStatus
  607.     )) {
  608.       App.globalStyle = '';
  609.     }
  610.     Object.assign(this, c);
  611.   }
  612. }
  613.  
  614. class Ruler {
  615. /*
  616.  'u' works only with URLs so it's ignored if 'html' is true
  617.    ||some.domain = matches some.domain, anything.some.domain, etc.
  618.    |foo = url or text must start with foo
  619.    ^ = separator like / or ? or : but not a letter/number, not %._-
  620.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  621.  'r' is checked only if 'u' matches first
  622. */
  623.   static init() {
  624.     const errors = new Map();
  625.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  626.     for (const rule of errors.keys())
  627.       App.handleError('Invalid custom host rule:', rule);
  628.  
  629.     // rules that disable previewing
  630.     const disablers = [
  631.       dotDomain.endsWith('.stackoverflow.com') && {
  632.         e: '.post-tag, .post-tag img',
  633.         s: '',
  634.       },
  635.       {
  636.         u: '||disqus.com/',
  637.         s: '',
  638.       },
  639.     ];
  640.  
  641.     // optimization: a rule is created only when on domain
  642.     const perDomain = [
  643.       hostname.includes('startpage') && {
  644.         r: /\boiu=(.+)/,
  645.         s: '$1',
  646.         follow: true,
  647.       },
  648.       dotDomain.endsWith('.4chan.org') && {
  649.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  650.         q: '.op .fileText a',
  651.         css: '#post-preview{display:none}',
  652.       },
  653.       hostname.includes('amazon.') && {
  654.         u: '/images/I/',
  655.         r: /.+?\/I\/.+?\./,
  656.         s: m => {
  657.           const uh = doc.getElementById('universal-hover');
  658.           return uh ? '' : m[0] + 'jpg';
  659.         },
  660.         css: '#zoomWindow{display:none!important;}',
  661.       },
  662.       dotDomain.endsWith('.bing.com') && {
  663.         e: 'a[m*="murl"]',
  664.         r: /murl&quot;:&quot;(.+?)&quot;/,
  665.         s: '$1',
  666.         html: true,
  667.       },
  668.       dotDomain.endsWith('.deviantart.com') && {
  669.         e: '[data-super-full-img] *, img[src*="/th/"]',
  670.         s: (m, node) => {
  671.           let el = node.closest('[data-super-full-img]');
  672.           if (el)
  673.             return el.dataset.superFullImg;
  674.           el = node.dataset.embedId && node.nextElementSibling;
  675.           if (el && el.dataset.embedId)
  676.             return el.src;
  677.         },
  678.       },
  679.       dotDomain.endsWith('.deviantart.com') && {
  680.         e: '.dev-view-deviation img',
  681.         s: () => [
  682.           ($('.dev-page-download') || 0).href,
  683.           ($('.dev-content-full') || 0).src,
  684.         ].filter(Boolean),
  685.       },
  686.       dotDomain.endsWith('.deviantart.com') && {
  687.         u: ',strp/',
  688.         s: '/\\/v1\\/.*//',
  689.       },
  690.       dotDomain.endsWith('.dropbox.com') && {
  691.         r: /(.+?&size_mode)=\d+(.*)/,
  692.         s: '$1=5$2',
  693.       },
  694.       dotDomain.endsWith('.facebook.com') && {
  695.         e: 'a[href*="ref=hovercard"]',
  696.         s: (m, node) =>
  697.           'https://www.facebook.com/photo.php?fbid=' +
  698.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  699.         follow: true,
  700.       },
  701.       dotDomain.endsWith('.facebook.com') && {
  702.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  703.         s: (m, node) =>
  704.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  705.             decodeURIComponent(m[4]),
  706.         html: true,
  707.         follow: true,
  708.       },
  709.       dotDomain.endsWith('.flickr.com') &&
  710.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  711.         u: '||flickr.com/photos/',
  712.         r: /photos\/[^/]+\/(\d+)/,
  713.         s: m => `https://www.flickr.com/services/rest/?${
  714.           new URLSearchParams({
  715.             photo_id: m[1],
  716.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  717.             method: 'flickr.photos.getSizes',
  718.             format: 'json',
  719.             nojsoncallback: 1,
  720.           }).toString()}`,
  721.         q: text => JSON.parse(text).sizes.size.pop().source,
  722.       },
  723.       dotDomain.endsWith('.github.com') && {
  724.         u: [
  725.           'avatars',
  726.           'raw.github.com',
  727.           '.png',
  728.           '.jpg',
  729.           '.jpeg',
  730.           '.bmp',
  731.           '.gif',
  732.           '.cur',
  733.           '.ico',
  734.         ],
  735.         r: new RegExp([
  736.           /(avatars.+?&s=)\d+/,
  737.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  738.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  739.         ].map(rx => rx.source).join('|')),
  740.         s: m => `https://${
  741.           m[1] ? `${m[1]}460` :
  742.             m[2] ? `${m[2]}usercontent${m[3]}` :
  743.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  744.         }`,
  745.       },
  746.       isGoogleImages && {
  747.         e: 'a',
  748.         u: '/imgres?imgurl=',
  749.         r: /imgurl=([^&]+)/,
  750.         s: '$1',
  751.       },
  752.       dotDomain.endsWith('.instagram.com') && {
  753.         e: [
  754.           'a[href*="/p/"]',
  755.           'a[role="button"][data-reactid*="scontent-"]',
  756.           'article div',
  757.           'article div div img',
  758.         ],
  759.         s: (m, node, rule) => {
  760.           const {a, data} = rule._getData(node) || {};
  761.           rule.follow = !data;
  762.           return (
  763.             !a ? false :
  764.               !data ? a.href :
  765.                 data.video_url || data.display_url);
  766.         },
  767.         c: (html, doc, node, rule) =>
  768.           tryCatch(() => rule._getData(node).data.edge_media_to_caption.edges[0].node.text) || '',
  769.         follow: true,
  770.         _getData(node) {
  771.           const n = node.closest('a[href*="/p/"], article');
  772.           if (!n)
  773.             return;
  774.           const a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  775.           if (!a)
  776.             return;
  777.           try {
  778.             const shortcode = a.pathname.match(/\/p\/(\w+)/)[1];
  779.             return {
  780.               a,
  781.               data: unsafeWindow._sharedData.entry_data.ProfilePage[0]
  782.                 .graphql.user.edge_owner_to_timeline_media.edges
  783.                 .find(e => e.node.shortcode === shortcode)
  784.                 .node,
  785.             };
  786.           } catch (e) {
  787.             return {a};
  788.           }
  789.         },
  790.       },
  791.       dotDomain.endsWith('.reddit.com') && {
  792.         u: '||i.reddituploads.com/',
  793.       },
  794.       dotDomain.endsWith('.reddit.com') && {
  795.         u: '||preview.redd.it/',
  796.         r: /(redd\.it\/\w+\.(jpe?g|png|gif))/,
  797.         s: 'https://i.$1',
  798.       },
  799.       dotDomain.endsWith('.tumblr.com') && {
  800.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  801.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  802.         follow: true,
  803.       },
  804.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  805.         e: 'a.media-item, a.js-media-image-link',
  806.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  807.         follow: true,
  808.       },
  809.       dotDomain.endsWith('.twitter.com') && {
  810.         e: '.grid-tweet > .media-overlay',
  811.         s: (m, node) => node.previousElementSibling.src,
  812.         follow: true,
  813.       },
  814.     ];
  815.  
  816.     const main = [
  817.       {
  818.         r: /[/?=](https?[^&]+)/,
  819.         s: '$1',
  820.         follow: true,
  821.       },
  822.       {
  823.         u: [
  824.           '||500px.com/photo/',
  825.           '||cl.ly/',
  826.           '||cweb-pix.com/',
  827.           '||ibb.co/',
  828.           '||imgcredit.xyz/image/',
  829.         ],
  830.         r: /\.\w+\/.+/,
  831.         q: 'meta[property="og:image"]',
  832.       },
  833.       {
  834.         u: 'attachment.php',
  835.         r: /attachment\.php.+attachmentid/,
  836.       },
  837.       {
  838.         u: '||abload.de/image',
  839.         q: '#image',
  840.       },
  841.       {
  842.         u: '||deviantart.com/art/',
  843.         s: (m, node) =>
  844.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  845.             '' :
  846.             m.input,
  847.         q: [
  848.           '#download-button[href*=".jpg"]',
  849.           '#download-button[href*=".jpeg"]',
  850.           '#download-button[href*=".gif"]',
  851.           '#download-button[href*=".png"]',
  852.           '#gmi-ResViewSizer_fullimg',
  853.           'img.dev-content-full',
  854.         ],
  855.       },
  856.       {
  857.         u: '||dropbox.com/s',
  858.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  859.         q: (text, doc) => {
  860.           const i = $('img.absolute-center', doc);
  861.           return i ? i.src.replace(/(size_mode)=\d+/, '$1=5') : false;
  862.         },
  863.       },
  864.       {
  865.         r: /[./]ebay\.[^/]+\/itm\//,
  866.         q: text =>
  867.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  868.             .replace(/~~60_\d+/, '~~60_57'),
  869.       },
  870.       {
  871.         u: '||i.ebayimg.com/',
  872.         s: (m, node) =>
  873.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  874.             m.input.replace(/~~60_\d+/, '~~60_57'),
  875.       },
  876.       {
  877.         u: '||fastpic.ru/view/',
  878.         q: '.image',
  879.       },
  880.       {
  881.         e: 'a',
  882.         u: '||fastpic.ru/',
  883.         r: /.+?\.\w+$/,
  884.         s: '$0?noht=1',
  885.       },
  886.       {
  887.         u: '||facebook.com/',
  888.         r: /photo\.php|[^/]+\/photos\//,
  889.         s: (m, node) =>
  890.           node.id === 'fbPhotoImage' ? false :
  891.             /gradient\.png$/.test(m.input) ? '' :
  892.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  893.         q: [
  894.           'div + span > a:first-child:not([href*="tag_faces"])',
  895.           'div + span > a[href*="tag_faces"] ~ a',
  896.         ],
  897.         rect: '#fbProfileCover',
  898.       },
  899.       {
  900.         u: '||fbcdn.',
  901.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  902.         s: m =>
  903.           dotDomain.endsWith('.facebook.com') &&
  904.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  905.           false,
  906.         manual: true,
  907.       },
  908.       {
  909.         u: ['||fbcdn-', 'fbcdn.net/'],
  910.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  911.         s: (m, node) => {
  912.           if (node.id === 'fbPhotoImage') {
  913.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  914.             if (a)
  915.               return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  916.           }
  917.           if (m[4])
  918.             return false;
  919.           if (node.parentNode.outerHTML.includes('/hovercard/'))
  920.             return '';
  921.           const gp = node.parentNode.parentNode;
  922.           if (node.outerHTML.includes('profile') && gp.href.includes('/photo'))
  923.             return false;
  924.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  925.         },
  926.         rect: '.photoWrap',
  927.       },
  928.       {
  929.         u: '||flickr.com/photos/',
  930.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  931.         s: m =>
  932.           m.input.indexOf('/sizes/') < 0 ?
  933.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  934.             false,
  935.         q: (text, doc) => {
  936.           const links = $$('.sizes-list a', doc);
  937.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  938.         },
  939.         follow: true,
  940.       },
  941.       {
  942.         u: '||flickr.com/photos/',
  943.         r: /\/sizes\//,
  944.         q: '#allsizes-photo > img',
  945.       },
  946.       {
  947.         u: '||gfycat.com/',
  948.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  949.         s: 'https://$1$3',
  950.         q: [
  951.           'meta[content$=".webm"]',
  952.           '#webmsource',
  953.           'source[src$=".webm"]',
  954.         ],
  955.       },
  956.       {
  957.         u: [
  958.           '||googleusercontent.com/proxy',
  959.           '||googleusercontent.com/gadgets/proxy',
  960.         ],
  961.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  962.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  963.       },
  964.       {
  965.         u: [
  966.           '||googleusercontent.com/',
  967.           '||ggpht.com/',
  968.         ],
  969.         s: (m, node) =>
  970.           m.input.includes('webcache.') ||
  971.           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/) ||
  972.           node.matches('.g-hovercard *, a[href*="profile_redirector"] > img') ?
  973.             '' :
  974.             m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  975.               .replace(/=[-\w]*\d+([&#].*|$)/, ''),
  976.       },
  977.       {
  978.         u: '||gravatar.com/',
  979.         r: /([a-z0-9]{32})/,
  980.         s: 'https://gravatar.com/avatar/$1?s=200',
  981.       },
  982.       {
  983.         u: '//gyazo.com/',
  984.         r: /\.com\/\w{32,}/,
  985.         q: 'meta[name="twitter:image"]',
  986.         xhr: true,
  987.       },
  988.       {
  989.         u: '||hostingkartinok.com/show-image.php',
  990.         q: '.image img',
  991.       },
  992.       {
  993.         u: [
  994.           '||imagecurl.com/images/',
  995.           '||imagecurl.com/viewer.php',
  996.         ],
  997.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  998.         s: 'https://imagecurl.com/images/$1$2$3',
  999.       },
  1000.       {
  1001.         u: '||imagebam.com/image/',
  1002.         q: 'meta[property="og:image"]',
  1003.         tabfix: true,
  1004.         xhr: hostname.includes('planetsuzy'),
  1005.       },
  1006.       {
  1007.         u: '||imageban.ru/thumbs',
  1008.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1009.         s: '$1out$2/$3/$4',
  1010.       },
  1011.       {
  1012.         u: [
  1013.           '||imageban.ru/show',
  1014.           '||imageban.net/show',
  1015.           '||ibn.im/',
  1016.         ],
  1017.         q: '#img_main',
  1018.       },
  1019.       {
  1020.         u: '||imageshack.us/img',
  1021.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1022.         s: 'https://$2/download/$1/$3$4',
  1023.       },
  1024.       {
  1025.         u: '||imageshack.us/i/',
  1026.         q: '#share-dl',
  1027.       },
  1028.       {
  1029.         u: '||imageteam.org/img',
  1030.         q: 'img[alt="image"]',
  1031.       },
  1032.       {
  1033.         u: [
  1034.           '||imagetwist.com/',
  1035.           '||imageshimage.com/',
  1036.         ],
  1037.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1038.         q: 'img.pic',
  1039.         xhr: true,
  1040.       },
  1041.       {
  1042.         u: '||imageupper.com/i/',
  1043.         q: '#img',
  1044.         xhr: true,
  1045.       },
  1046.       {
  1047.         u: '||imagevenue.com/img.php',
  1048.         q: '#thepic',
  1049.       },
  1050.       {
  1051.         u: '||imagezilla.net/show/',
  1052.         q: '#photo',
  1053.         xhr: true,
  1054.       },
  1055.       {
  1056.         u: [
  1057.           '||images-na.ssl-images-amazon.com/images/',
  1058.           '||media-imdb.com/images/',
  1059.         ],
  1060.         r: /images\/.+?\.jpg/,
  1061.         s: '/V1\\.?_.+?\\.//g',
  1062.       },
  1063.       {
  1064.         u: '||imgbox.com/',
  1065.         r: /\.com\/([a-z0-9]+)$/i,
  1066.         q: '#img',
  1067.         xhr: hostname !== 'imgbox.com',
  1068.       },
  1069.       {
  1070.         u: '||imgclick.net/',
  1071.         r: /\.net\/(\w+)/,
  1072.         q: 'img.pic',
  1073.         xhr: true,
  1074.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1075.       },
  1076.       {
  1077.         u: [
  1078.           '||imgflip.com/i/',
  1079.           '||imgflip.com/gif/',
  1080.         ],
  1081.         r: /\/(i|gif)\/([^/?#]+)/,
  1082.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1083.       },
  1084.       {
  1085.         u: [
  1086.           '||imgur.com/a/',
  1087.           '||imgur.com/gallery/',
  1088.           '||imgur.com/t/',
  1089.         ],
  1090.         g: async (text, doc, url, m, rule, cb) => {
  1091.           // simplified extraction of JSON as it occupies only one line
  1092.           if (!/(?:mergeConfig\('gallery',\s*|Imgur\.Album\.getInstance\()[\s\S]*?[,\s{"'](?:image|album)\s*:\s*({[^\r\n]+?}),?[\r\n]/.test(text))
  1093.             return;
  1094.           const info = JSON.parse(RegExp.$1);
  1095.           let images = info.is_album ? info.album_images.images : [info];
  1096.           if (info.num_images > images.length) {
  1097.             const url = `https://imgur.com/ajaxalbums/getimages/${info.hash}/hit.json?all=true`;
  1098.             images = JSON.parse((await Remoting.gmXhr(url)).responseText).data.images;
  1099.           }
  1100.           const items = [];
  1101.           for (const img of images || []) {
  1102.             const u = `https://i.imgur.com/${img.hash}`;
  1103.             items.push({
  1104.               url: img.ext === '.gif' && img.animated !== false ?
  1105.                 [`${u}.webm`, `${u}.mp4`, u] :
  1106.                 u + img.ext,
  1107.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1108.             });
  1109.           }
  1110.           if (images && info.is_album && !safeIncludes(items[0].desc, info.title))
  1111.             items.title = info.title;
  1112.           cb(items);
  1113.         },
  1114.         css: '.post > .hover { display:none!important; }',
  1115.       },
  1116.       {
  1117.         u: '||imgur.com/',
  1118.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1119.         s: 'gallery',
  1120.         g: (text, doc, url, m) =>
  1121.           m[2].split(',').map(id => ({
  1122.             url: `https://i.${m[1]}${id}.jpg`,
  1123.           })),
  1124.       },
  1125.       {
  1126.         u: '||imgur.com/',
  1127.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.([a-z]+))/i,
  1128.         s: (m, node) => {
  1129.           if (/memegen|random|register|search|signin/.test(m.input))
  1130.             return '';
  1131.           const a = node.closest('a');
  1132.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1133.             return false;
  1134.           const id = m[3].replace(/(.{7})[bhm]$/, '$1');
  1135.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1136.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1137.           return ext === 'webm' ?
  1138.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1139.             u + ext;
  1140.         },
  1141.       },
  1142.       {
  1143.         u: [
  1144.           '||instagr.am/p/',
  1145.           '||instagram.com/p/',
  1146.         ],
  1147.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1148.         q: text => {
  1149.           const m = JSON.parse(text).graphql.shortcode_media;
  1150.           return m.video_url || m.display_url;
  1151.         },
  1152.         rect: 'div.PhotoGridMediaItem',
  1153.         c: text => {
  1154.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1155.           return m === undefined ? '(no caption)' : m.node.text;
  1156.         },
  1157.       },
  1158.       {
  1159.         u: [
  1160.           '||livememe.com/',
  1161.           '||lvme.me/',
  1162.         ],
  1163.         r: /\.\w+\/([^.]+)$/,
  1164.         s: 'http://i.lvme.me/$1.jpg',
  1165.       },
  1166.       {
  1167.         u: '||lostpic.net/image',
  1168.         q: '.image-viewer-image img',
  1169.       },
  1170.       {
  1171.         u: '||makeameme.org/meme/',
  1172.         r: /\/meme\/([^/?#]+)/,
  1173.         s: 'https://media.makeameme.org/created/$1.jpg',
  1174.       },
  1175.       {
  1176.         u: '||photobucket.com/',
  1177.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1178.         s: 'https://i$1$3',
  1179.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1180.       },
  1181.       {
  1182.         u: '||piccy.info/view3/',
  1183.         r: /(.+?\/view3)\/(.*)\//,
  1184.         s: '$1/$2/orig/',
  1185.         q: '#mainim',
  1186.       },
  1187.       {
  1188.         u: '||pimpandhost.com/image/',
  1189.         r: /(.+?\/image\/[0-9]+)/,
  1190.         s: '$1?size=original',
  1191.         q: 'img.original',
  1192.       },
  1193.       {
  1194.         u: [
  1195.           '||pixroute.com/',
  1196.           '||imgspice.com/',
  1197.         ],
  1198.         r: /\.html$/,
  1199.         q: 'img[id]',
  1200.         xhr: true,
  1201.       },
  1202.       {
  1203.         u: '||postima',
  1204.         r: /postima?ge?\.org\/image\/\w+/,
  1205.         q: [
  1206.           'a[href*="dl="]',
  1207.           '#main-image',
  1208.         ],
  1209.       },
  1210.       {
  1211.         u: [
  1212.           '||prntscr.com/',
  1213.           '||prnt.sc/',
  1214.         ],
  1215.         r: /\.\w+\/.+/,
  1216.         q: 'meta[property="og:image"]',
  1217.         xhr: true,
  1218.       },
  1219.       {
  1220.         u: '||radikal.ru/',
  1221.         r: /\.ru\/(fp|.+\.html)/,
  1222.         q: text => text.match(/http:\/\/[a-z0-9]+\.radikal\.ru[a-z0-9/]+\.(jpg|gif|png)/i)[0],
  1223.       },
  1224.       {
  1225.         u: '||tumblr.com',
  1226.         r: /_500\.jpg/,
  1227.         s: ['/_500/_1280/', ''],
  1228.       },
  1229.       {
  1230.         u: '||twimg.com/',
  1231.         r: /\/profile_images/i,
  1232.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1233.       },
  1234.       {
  1235.         u: '||twimg.com/media/',
  1236.         r: /.+?format=(jpe?g|png|gif)/i,
  1237.         s: '$0&name=large',
  1238.       },
  1239.       {
  1240.         u: '||twimg.com/1/proxy',
  1241.         r: /t=([^&_]+)/i,
  1242.         s: m => atob(m[1]).match(/http.+/),
  1243.       },
  1244.       {
  1245.         u: '||pic.twitter.com/',
  1246.         r: /\.com\/[a-z0-9]+/i,
  1247.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1248.         follow: true,
  1249.       },
  1250.       {
  1251.         u: '||twitpic.com/',
  1252.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1253.         s: 'https://twitpic.com/show/large/$2',
  1254.       },
  1255.       {
  1256.         u: '||upix.me/files',
  1257.         s: '/#//',
  1258.       },
  1259.       {
  1260.         u: '||wiki',
  1261.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1262.         s: '/\\/thumb(?=\\/)|' +
  1263.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1264.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1265.         xhr: !hostname.includes('wiki'),
  1266.       },
  1267.       {
  1268.         u: '||ytimg.com/vi/',
  1269.         r: /(.+?\/vi\/[^/]+)/,
  1270.         s: '$1/0.jpg',
  1271.         rect: '.video-list-item',
  1272.       },
  1273.       {
  1274.         u: '/viewer.php?file=',
  1275.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1276.         s: '$1/images/$2',
  1277.         xhr: true,
  1278.       },
  1279.       {
  1280.         u: '/thumb_',
  1281.         r: /\/albums.+\/thumb_[^/]/,
  1282.         s: '/thumb_//',
  1283.       },
  1284.       {
  1285.         u: [
  1286.           '.th.jp',
  1287.           '.th.gif',
  1288.           '.th.png',
  1289.         ],
  1290.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1291.         s: '$1$2',
  1292.         follow: true,
  1293.       },
  1294.       {
  1295.         u: [
  1296.           '.jp',
  1297.           '.gif',
  1298.           '.png',
  1299.           '.svg',
  1300.           '.webm',
  1301.         ],
  1302.         r: /[^?:]+\.(jpe?g?|gif|png|svg|webm)($|\?)/i,
  1303.       },
  1304.     ];
  1305.  
  1306.     /** @type mpiv.HostRule[] */
  1307.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1308.   }
  1309.  
  1310.   static format(rule, {expand} = {}) {
  1311.     const s = JSON.stringify(rule, null, ' ');
  1312.     return expand ?
  1313.       /* {"a": ...,
  1314.           "b": ...,
  1315.           "c": ...
  1316.          } */
  1317.       s.replace(/^{\s+/g, '{') :
  1318.       /* {"a": ..., "b": ..., "c": ...} */
  1319.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1320.   }
  1321.  
  1322.   /** @returns mpiv.HostRule | Error | false | undefined */
  1323.   static parse(rule) {
  1324.     const isBatchOp = this instanceof Map;
  1325.     try {
  1326.       if (typeof rule === 'string')
  1327.         rule = JSON.parse(rule);
  1328.       if ('d' in rule && typeof rule.d !== 'string')
  1329.         rule.d = undefined;
  1330.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1331.         return false;
  1332.       const compileTo = isBatchOp ? rule : {};
  1333.       if (rule.r)
  1334.         compileTo.r = new RegExp(rule.r, 'i');
  1335.       if (RX_HAS_CODE.test(rule.s))
  1336.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1337.       if (RX_HAS_CODE.test(rule.q))
  1338.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1339.       if (RX_HAS_CODE.test(rule.c))
  1340.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1341.       return rule;
  1342.     } catch (e) {
  1343.       if (!e.message.includes('unsafe-eval'))
  1344.         if (isBatchOp) {
  1345.           this.set(rule, e);
  1346.         } else {
  1347.           return e;
  1348.         }
  1349.     }
  1350.   }
  1351.  
  1352.   static runQ(text, doc, docUrl) {
  1353.     let url;
  1354.     if (typeof ai.rule.q === 'function') {
  1355.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1356.       if (Array.isArray(url)) {
  1357.         ai.urls = url.slice(1);
  1358.         url = url[0];
  1359.       }
  1360.     } else {
  1361.       const el = $many(ai.rule.q, doc);
  1362.       url = el && Remoting.findFileUrl(el, docUrl);
  1363.     }
  1364.     return url;
  1365.   }
  1366.  
  1367.   static runS(node, rule, m) {
  1368.     let urls = [];
  1369.     for (const s of ensureArray(rule.s))
  1370.       urls.push(
  1371.         typeof s === 'string' ? Util.maybeDecodeURL(Ruler.substituteSingle(s, m)) :
  1372.           typeof s === 'function' ? s(m, node, rule) :
  1373.             s);
  1374.     if (rule.q && urls.length > 1) {
  1375.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1376.       return {skipRule: true};
  1377.     }
  1378.     if (Array.isArray(urls[0]))
  1379.       urls = urls[0];
  1380.     // `false` returned by "s" property means "skip this rule"
  1381.     // any other falsy value (like say "") means "stop all rules"
  1382.     return urls[0] === false ? {skipRule: true} : urls.map(Util.maybeDecodeURL);
  1383.   }
  1384.  
  1385.   static substituteSingle(s, m) {
  1386.     if (!m)
  1387.       return s;
  1388.     if (s.startsWith('/') && !s.startsWith('//')) {
  1389.       const mid = s.search(/[^\\]\//) + 1;
  1390.       const end = s.lastIndexOf('/');
  1391.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1392.       return m.input.replace(re, s.slice(mid + 1, end));
  1393.     }
  1394.     if (m.length && s.includes('$')) {
  1395.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  1396.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  1397.         for (let i = maxLength; i >= 0; i--) {
  1398.           const part = num.slice(0, i) | 0;
  1399.           if (part < m.length)
  1400.             return (m[part] || '') + num.slice(i);
  1401.         }
  1402.         return text;
  1403.       });
  1404.     }
  1405.     return s;
  1406.   }
  1407. }
  1408.  
  1409. const SimpleUrlMatcher = (() => {
  1410.   // string-to-regexp escaped chars
  1411.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  1412.   // rx for '^' symbol in simple url match
  1413.   const RX_SEP = /[^\w%._-]/g;
  1414.   const RXS_SEP = RX_SEP.source;
  1415.  
  1416.   function checkArray(s) {
  1417.     return this.some(checkArrayItem, s);
  1418.   }
  1419.  
  1420.   function checkArrayItem(item) {
  1421.     return item.fn.call(item.this, this);
  1422.   }
  1423.  
  1424.   function equals(s) {
  1425.     return s.startsWith(this) && (
  1426.       s.length === this.length ||
  1427.       s.length === this.length + 1 && endsWithSep(s));
  1428.   }
  1429.  
  1430.   function starts(s) {
  1431.     return s.startsWith(this);
  1432.   }
  1433.  
  1434.   function ends(s) {
  1435.     return s.endsWith(this) || (
  1436.       s.length > this.length &&
  1437.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  1438.       endsWithSep(s));
  1439.   }
  1440.  
  1441.   function has(s) {
  1442.     return s.includes(this);
  1443.   }
  1444.  
  1445.   function regexp(s) {
  1446.     return s.includes(this[0]) && this[1].test(s);
  1447.   }
  1448.  
  1449.   function endsWithSep(s) {
  1450.     RX_SEP.lastIndex = s.length - 1;
  1451.     return RX_SEP.test(s);
  1452.   }
  1453.  
  1454.   function startsDomainPrescreen(url) {
  1455.     return url.includes(this[0]) &&
  1456.            startsDomain.call(this, url);
  1457.   }
  1458.  
  1459.   function startsDomain(url) {
  1460.     const [p, gap, host] = url.split('/', 3);
  1461.     if (gap || p && !p.endsWith(':'))
  1462.       return;
  1463.     const [needle, domain, pinDomainEnd, endSep] = this;
  1464.     let start = pinDomainEnd ? host.length - domain.length : 0;
  1465.     for (; ; start++) {
  1466.       start = host.indexOf(domain, start);
  1467.       if (start < 0)
  1468.         return;
  1469.       if (!start || host[start - 1] === '.')
  1470.         break;
  1471.     }
  1472.     start += p.length + 2;
  1473.     return url.lastIndexOf(needle, start) === start &&
  1474.            (!endSep || start + needle.length === url.length);
  1475.   }
  1476.  
  1477.   function findLongestPart(s) {
  1478.     const len = s.length;
  1479.     let maxLen = 0;
  1480.     let start;
  1481.     for (let i = 0, j; i < len; i = j + 1) {
  1482.       j = s.indexOf('^', i);
  1483.       if (j < 0)
  1484.         j = len;
  1485.       if (j - i > maxLen) {
  1486.         maxLen = j - i;
  1487.         start = i;
  1488.       }
  1489.     }
  1490.     return maxLen < len ? s.substr(start, maxLen) : s;
  1491.   }
  1492.  
  1493.   return {
  1494.     compile(match) {
  1495.       const results = [];
  1496.       for (const s of ensureArray(match)) {
  1497.         const pinDomain = s.startsWith('||');
  1498.         const pinStart = !pinDomain && s.startsWith('|');
  1499.         const endSep = s.endsWith('^');
  1500.         let fn;
  1501.         let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  1502.         if (needle.includes('^')) {
  1503.           const plain = findLongestPart(needle);
  1504.           const rx = new RegExp(
  1505.             (pinStart ? '^' : '') +
  1506.             (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  1507.             needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  1508.             (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  1509.           needle = [plain, rx];
  1510.           fn = regexp;
  1511.         } else if (pinStart) {
  1512.           fn = endSep ? equals : starts;
  1513.         } else if (pinDomain) {
  1514.           const slashPos = needle.indexOf('/');
  1515.           const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  1516.           needle = [needle, domain, slashPos > 0, endSep];
  1517.           fn = startsDomainPrescreen;
  1518.         } else if (endSep) {
  1519.           fn = ends;
  1520.         } else {
  1521.           fn = has;
  1522.         }
  1523.         results.push({fn, this: needle});
  1524.       }
  1525.       return results.length > 1 ?
  1526.         {fn: checkArray, this: results} :
  1527.         results[0];
  1528.     },
  1529.   };
  1530. })();
  1531.  
  1532. class RuleMatcher {
  1533.  
  1534.   /** @returns ?mpiv.RuleMatchInfo */
  1535.   static findForLink(a) {
  1536.     let url =
  1537.       a.getAttribute('data-expanded-url') ||
  1538.       a.getAttribute('data-full-url') ||
  1539.       a.getAttribute('data-url') ||
  1540.       a.href;
  1541.     if (url.startsWith('data:'))
  1542.       url = false;
  1543.     else if (url.includes('//t.co/'))
  1544.       url = 'http://' + a.textContent;
  1545.     return RuleMatcher.find(url, a);
  1546.   }
  1547.  
  1548.   /** @returns ?mpiv.RuleMatchInfo */
  1549.   static find(url, node, {noHtml, skipRule} = {}) {
  1550.     const tn = node.tagName;
  1551.     let m, html, urls;
  1552.     for (const rule of Ruler.rules) {
  1553.       if (rule.e && !node.matches(rule.e) || rule === skipRule)
  1554.         continue;
  1555.       if (rule.html && rule.r && !noHtml && (tn === 'A' || tn === 'IMG' || rule.e))
  1556.         m = rule.r.exec(html || (html = node.outerHTML));
  1557.       else if (url)
  1558.         m = (rule.r || rule.u) ?
  1559.           RuleMatcher.makeUrlMatch(url, node, rule) :
  1560.           RuleMatcher.makeDummyMatch(url);
  1561.       if (!m ||
  1562.           // a rule with follow:true for the currently hovered IMG produced a URL,
  1563.           // but we'll only allow it to match rules without 's' in the nested find call
  1564.           tn === 'IMG' && !('s' in rule) && !skipRule)
  1565.         continue;
  1566.       if (rule.s === '')
  1567.         return {};
  1568.       const hasS = 's' in rule && rule.s !== 'gallery';
  1569.       urls = hasS ?
  1570.         Ruler.runS(node, rule, m) :
  1571.         [m.input];
  1572.       if (!urls.skipRule) {
  1573.         const url = urls[0];
  1574.         return !url ? {} :
  1575.           hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule) ?
  1576.             RuleMatcher.find(url, node, {skipRule: rule}) :
  1577.             RuleMatcher.makeInfo(urls, node, rule, m);
  1578.       }
  1579.     }
  1580.   }
  1581.  
  1582.   static makeUrlMatch(url, node, rule) {
  1583.     let {r, u} = rule;
  1584.     let m;
  1585.     if (u) {
  1586.       u = rule._u || (rule._u = SimpleUrlMatcher.compile(u));
  1587.       m = u.fn.call(u.this, url) && (r || RuleMatcher.makeDummyMatch(url));
  1588.     }
  1589.     return (m || !u) && r ? r.exec(url) : m;
  1590.   }
  1591.  
  1592.   static makeDummyMatch(url) {
  1593.     const m = [url];
  1594.     m.index = 0;
  1595.     m.input = url;
  1596.     return m;
  1597.   }
  1598.  
  1599.   /** @returns mpiv.RuleMatchInfo */
  1600.   static makeInfo(urls, node, rule, m) {
  1601.     const url = urls[0];
  1602.     const info = {
  1603.       node,
  1604.       rule,
  1605.       url,
  1606.       urls: urls.length > 1 ? urls.slice(1) : null,
  1607.       match: m,
  1608.       gallery: rule.g && Gallery.makeParser(rule.g),
  1609.       post: typeof rule.post === 'function' ? rule.post(m) : rule.post,
  1610.       xhr: cfg.xhr && rule.xhr,
  1611.     };
  1612.     Util.lazyGetRect(info, node, rule.rect);
  1613.     if (
  1614.       dotDomain.endsWith('.twitter.com') && !/(facebook|google|twimg|twitter)\.com\//.test(url) ||
  1615.       dotDomain.endsWith('.github.com') && !/github/.test(url) ||
  1616.       dotDomain.endsWith('.facebook.com') && /\bimgur\.com/.test(url)
  1617.     ) {
  1618.       info.xhr = 'data';
  1619.     }
  1620.     return info;
  1621.   }
  1622.  
  1623.   static isFollowableUrl(url, rule) {
  1624.     const f = rule.follow;
  1625.     return typeof f === 'function' ? f(url) : f;
  1626.   }
  1627. }
  1628.  
  1629. class Events {
  1630.  
  1631.   static drop(e) {
  1632.     e.preventDefault();
  1633.     e.stopPropagation();
  1634.   }
  1635.  
  1636.   static onMouseOver(e) {
  1637.     if (!App.enabled || e.shiftKey || ai.zoom)
  1638.       return;
  1639.     let node = e.target;
  1640.     if (node === ai.popup ||
  1641.         node === doc.body ||
  1642.         node === doc.documentElement)
  1643.       return;
  1644.  
  1645.     if (node.shadowRoot)
  1646.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  1647.  
  1648.     if (!Ruler.rules)
  1649.       Ruler.init();
  1650.  
  1651.     let a, img, url, info;
  1652.     if (node.tagName === 'A') {
  1653.       a = node;
  1654.     } else {
  1655.       if (node.tagName === 'IMG') {
  1656.         img = node;
  1657.         if (!img.src.startsWith('data:'))
  1658.           url = Util.rel2abs(img.src, location.href);
  1659.       }
  1660.       info = RuleMatcher.find(url, node);
  1661.       if (!info)
  1662.         a = node.closest('a');
  1663.     }
  1664.  
  1665.     if (!info && a)
  1666.       info = RuleMatcher.findForLink(a);
  1667.  
  1668.     if (!info && img) {
  1669.       info = Util.lazyGetRect({
  1670.         url: img.src,
  1671.         node: img,
  1672.         rule: {},
  1673.       }, img);
  1674.     }
  1675.  
  1676.     if (info && info.url && info.node !== ai.node)
  1677.       App.activate(info, e);
  1678.   }
  1679.  
  1680.   static pierceShadow(node, x, y) {
  1681.     for (let root; (root = node.shadowRoot);) {
  1682.       root.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  1683.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1684.       const inner = root.elementFromPoint(x, y);
  1685.       if (!inner || inner === node)
  1686.         break;
  1687.       node = inner;
  1688.     }
  1689.     return node;
  1690.   }
  1691.  
  1692.   static onMouseOut(e) {
  1693.     if (!e.relatedTarget && !e.shiftKey)
  1694.       App.deactivate();
  1695.   }
  1696.  
  1697.   static onMouseOutShadow(e) {
  1698.     const root = e.target.shadowRoot;
  1699.     if (root) {
  1700.       root.removeEventListener('mouseover', Events.onMouseOver);
  1701.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  1702.     }
  1703.   }
  1704.  
  1705.   static onMouseMove(e) {
  1706.     App.updateMouse(e);
  1707.     if (e.shiftKey) {
  1708.       ai.lazyUnload = true;
  1709.       return;
  1710.     }
  1711.     if (!ai.zoomed && !ai.isOverRect) {
  1712.       App.deactivate();
  1713.       return;
  1714.     }
  1715.     if (ai.zoom) {
  1716.       Popup.move();
  1717.       const {height: h, width: w} = ai.view;
  1718.       const {clientX: cx, clientY: cy} = ai;
  1719.       const bx = w / 6;
  1720.       const by = h / 6;
  1721.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  1722.       App.setStatus(`${onEdge ? '+' : '-'}edge`);
  1723.     }
  1724.   }
  1725.  
  1726.   static onMouseDown({shiftKey, button}) {
  1727.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  1728.       ai.controlled = ai.zoomed = true;
  1729.     } else if (button === 2 || shiftKey) {
  1730.       // we ignore RMB and Shift
  1731.     } else {
  1732.       App.deactivate({wait: true});
  1733.     }
  1734.   }
  1735.  
  1736.   static onMouseScroll(e) {
  1737.     const dir = (e.deltaY || -e.wheelDelta) > 0 ? 1 : -1;
  1738.     if (ai.zoom) {
  1739.       Events.drop(e);
  1740.       const i = ai.scales.indexOf(ai.scale) - dir;
  1741.       if (i >= 0 && i < ai.scales.length)
  1742.         ai.scale = ai.scales[i];
  1743.       if (i === 0 && cfg.zoomOut !== 'stay') {
  1744.         if ((cfg.zoomOut === 'close' || !ai.isOverRect) &&
  1745.             (!ai.gItems || ai.gItems.length < 2)) {
  1746.           App.deactivate({wait: true});
  1747.           return;
  1748.         }
  1749.         ai.zoom = false;
  1750.         ai.zoomed = false;
  1751.         App.updateFileInfo();
  1752.       }
  1753.       if (ai.zooming)
  1754.         ai.popup.classList.add(`${PREFIX}zooming`);
  1755.       Popup.move();
  1756.       App.updateTitle();
  1757.     } else if (ai.gItems && ai.gItems.length > 1 && ai.popup) {
  1758.       Events.drop(e);
  1759.       Gallery.next(dir);
  1760.     } else if (cfg.zoom === 'wheel' && dir < 0 && ai.popup) {
  1761.       Events.drop(e);
  1762.       App.toggleZoom();
  1763.     } else {
  1764.       App.deactivate();
  1765.     }
  1766.   }
  1767.  
  1768.   static onKeyDown(e) {
  1769.     switch (e.key) {
  1770.       case 'Shift':
  1771.         App.setStatus('+shift');
  1772.         if (ai.popup && 'controls' in ai.popup)
  1773.           ai.popup.controls = true;
  1774.         break;
  1775.       case 'Control':
  1776.         if (!ai.popup && (cfg.start !== 'auto' || ai.rule.manual))
  1777.           Popup.start();
  1778.         break;
  1779.     }
  1780.   }
  1781.  
  1782.   static onKeyUp(e) {
  1783.     switch (e.key.length > 1 ? e.key : e.code) {
  1784.       case 'Shift':
  1785.         App.setStatus('-shift');
  1786.         if ((ai.popup || {}).controls)
  1787.           ai.popup.controls = false;
  1788.         if (ai.controlled) {
  1789.           ai.controlled = false;
  1790.           return;
  1791.         }
  1792.         ai.popup && (ai.zoomed || ai.isOverRect !== false) ?
  1793.           App.toggleZoom() :
  1794.           App.deactivate({wait: true});
  1795.         break;
  1796.       case 'Control':
  1797.         break;
  1798.       case 'Escape':
  1799.         App.deactivate({wait: true});
  1800.         break;
  1801.       case 'ArrowRight':
  1802.       case 'KeyJ':
  1803.         Events.drop(e);
  1804.         Gallery.next(1);
  1805.         break;
  1806.       case 'ArrowLeft':
  1807.       case 'KeyK':
  1808.         Events.drop(e);
  1809.         Gallery.next(-1);
  1810.         break;
  1811.       case 'KeyD': {
  1812.         Events.drop(e);
  1813.         Remoting.saveFile();
  1814.         break;
  1815.       }
  1816.       case 'KeyT':
  1817.         ai.lazyUnload = true;
  1818.         GM_openInTab(
  1819.           ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  1820.           navigator.userAgent.includes('Gecko/') ?
  1821.             Util.tabFixUrl() :
  1822.             ai.popup.src);
  1823.         App.deactivate();
  1824.         break;
  1825.       default:
  1826.         App.deactivate({wait: true});
  1827.     }
  1828.   }
  1829.  
  1830.   static onContext(e) {
  1831.     if (e.shiftKey)
  1832.       return;
  1833.     if (cfg.zoom === 'context' && ai.popup && App.toggleZoom()) {
  1834.       Events.drop(e);
  1835.       return;
  1836.     }
  1837.     if (!ai.popup && (
  1838.       cfg.start === 'context' ||
  1839.       (cfg.start === 'auto' && ai.rule.manual)
  1840.     )) {
  1841.       Popup.start();
  1842.       Events.drop(e);
  1843.     } else {
  1844.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1845.     }
  1846.   }
  1847. }
  1848.  
  1849. class Popup {
  1850.  
  1851.   static schedule(force) {
  1852.     if (!cfg.preload) {
  1853.       ai.timer = setTimeout(Popup.start, cfg.delay);
  1854.     } else if (!force) {
  1855.       // we don't want to preload everything in the path of a quickly moving mouse cursor
  1856.       ai.timer = setTimeout(Popup.start, SETTLE_TIME, force);
  1857.       ai.preloadStart = Date.now();
  1858.     } else {
  1859.       App.setStatus('+preloading');
  1860.       setTimeout(App.setStatus, cfg.delay, '-preloading');
  1861.     }
  1862.   }
  1863.  
  1864.   static start() {
  1865.     App.updateStyles();
  1866.     ai.gallery ?
  1867.       Popup.startGallery() :
  1868.       Popup.startSingle();
  1869.   }
  1870.  
  1871.   static startSingle() {
  1872.     App.setStatusLoading();
  1873.     ai.imageUrl = null;
  1874.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  1875.       Remoting.findRedirect();
  1876.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  1877.       Popup.startFromQ();
  1878.     } else {
  1879.       App.updateCaption();
  1880.       Popup.render(ai.url);
  1881.     }
  1882.   }
  1883.  
  1884.   static async startFromQ() {
  1885.     try {
  1886.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  1887.       const url = Ruler.runQ(responseText, doc, finalUrl);
  1888.       if (!url)
  1889.         throw 'File not found.';
  1890.       App.updateCaption(responseText, doc);
  1891.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  1892.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  1893.         if (!info || !info.url)
  1894.           throw `Couldn't follow URL: ${url}`;
  1895.         Object.assign(ai, info);
  1896.         Popup.startSingle();
  1897.       } else {
  1898.         Popup.render(url, finalUrl);
  1899.       }
  1900.     } catch (e) {
  1901.       App.handleError(e);
  1902.     }
  1903.   }
  1904.  
  1905.   static async startGallery() {
  1906.     App.setStatusLoading();
  1907.     try {
  1908.       const startUrl = ai.url;
  1909.       const p = ai.rule.s === 'gallery' ? {} :
  1910.         await Remoting.getDoc(startUrl);
  1911.       const items = await new Promise(resolve => {
  1912.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, resolve);
  1913.         if (Array.isArray(it))
  1914.           resolve(it);
  1915.       });
  1916.       // bail out if the gallery's async callback took too long
  1917.       if (ai.url !== startUrl)
  1918.         return;
  1919.       ai.gItems = items.length && items;
  1920.       if (ai.gItems) {
  1921.         ai.gIndex = Gallery.findIndex(ai.url);
  1922.         setTimeout(Gallery.next);
  1923.       } else {
  1924.         throw 'Empty gallery';
  1925.       }
  1926.     } catch (e) {
  1927.       App.handleError(e);
  1928.     }
  1929.   }
  1930.  
  1931.   static async render(src, pageUrl = ai.url) {
  1932.     Popup.destroy();
  1933.     ai.imageUrl = src;
  1934.     if (ai.xhr && src)
  1935.       src = await Remoting.getImage(src, pageUrl).catch(App.handleError);
  1936.     if (!src)
  1937.       return;
  1938.     const p = ai.popup =
  1939.       src.startsWith('data:video') ||
  1940.       !src.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(src) ?
  1941.         PopupVideo.create() :
  1942.         $create('img');
  1943.     p.id = `${PREFIX}popup`;
  1944.     p.src = src;
  1945.     p.addEventListener('error', App.handleError);
  1946.     p.addEventListener('load', Popup.onLoad, {once: true});
  1947.     if (ai.zooming)
  1948.       p.addEventListener('transitionend', Popup.onZoom);
  1949.     doc.body.insertBefore(p, ai.bar || undefined);
  1950.     ai.timer = setTimeout(App.checkProgress, 0, {start: true});
  1951.   }
  1952.  
  1953.   static onLoad() {
  1954.     this.setAttribute('loaded', '');
  1955.     ai.popupLoaded = true;
  1956.     if (!ai.bar)
  1957.       App.updateFileInfo();
  1958.   }
  1959.  
  1960.   static onZoom() {
  1961.     return this.classList.remove(`${PREFIX}zooming`);
  1962.   }
  1963.  
  1964.   static move() {
  1965.     const p = ai.popup;
  1966.     if (!p)
  1967.       return;
  1968.     let x, y;
  1969.     const w = Math.round(ai.scale * ai.nwidth);
  1970.     const h = Math.round(ai.scale * ai.nheight);
  1971.     const cx = ai.clientX;
  1972.     const cy = ai.clientY;
  1973.     const vw = ai.view.width - ai.outline * 2;
  1974.     const vh = ai.view.height - ai.outline * 2;
  1975.     if (!ai.zoom && (!ai.gItems || ai.gItems.length < 2) && !cfg.center) {
  1976.       const r = ai.rect;
  1977.       const rx = (r.left + r.right) / 2;
  1978.       const ry = (r.top + r.bottom) / 2;
  1979.       if (vw - r.right - 40 > w + ai.mbw || w + ai.mbw < r.left - 40) {
  1980.         if (h + ai.mbh < vh - 60)
  1981.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1982.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1983.       } else if (vh - r.bottom - 40 > h + ai.mbh || h + ai.mbh < r.top - 40) {
  1984.         if (w + ai.mbw < vw - 60)
  1985.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1986.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1987.       }
  1988.     }
  1989.     if (x === undefined) {
  1990.       const mid = vw > w ?
  1991.         vw / 2 - w / 2 :
  1992.         -1 * clamp(5 / 3 * (cx / vw - 0.2), 0, 1) * (w - vw);
  1993.       x = Math.round(mid - (ai.pw + ai.mbw) / 2);
  1994.     }
  1995.     if (y === undefined) {
  1996.       const mid = vh > h ?
  1997.         vh / 2 - h / 2 :
  1998.         -1 * clamp(5 / 3 * (cy / vh - 0.2), 0, 1) * (h - vh);
  1999.       y = Math.round(mid - (ai.ph + ai.mbh) / 2);
  2000.     }
  2001.     p.style.cssText = `
  2002.       width: ${w}px !important;
  2003.       height: ${h}px !important;
  2004.       left: ${x + ai.outline}px !important;
  2005.       top: ${y + ai.outline}px !important;
  2006.     `;
  2007.   }
  2008.  
  2009.   static destroy() {
  2010.     const p = ai.popup;
  2011.     if (!p)
  2012.       return;
  2013.     p.removeEventListener('error', App.handleError);
  2014.     if (typeof p.pause === 'function')
  2015.       p.pause();
  2016.     if (!ai.lazyUnload) {
  2017.       if (p.src.startsWith('blob:'))
  2018.         URL.revokeObjectURL(p.src);
  2019.       p.src = '';
  2020.     }
  2021.     p.remove();
  2022.     ai.zoom = false;
  2023.     ai.popupLoaded = false;
  2024.     ai.popup = null;
  2025.   }
  2026. }
  2027.  
  2028. class PopupVideo {
  2029.   static create() {
  2030.     const p = $create('video');
  2031.     p.autoplay = true;
  2032.     p.loop = true;
  2033.     p.volume = 0.5;
  2034.     p.controls = false;
  2035.     p.addEventListener('progress', PopupVideo.progress);
  2036.     p.addEventListener('canplaythrough', PopupVideo.progressDone, {once: true});
  2037.     ai.bufferingBar = false;
  2038.     ai.bufferingStart = Date.now();
  2039.     return p;
  2040.   }
  2041.  
  2042.   static progress() {
  2043.     const {duration} = this;
  2044.     if (duration && this.buffered.length && Date.now() - ai.bufferingStart > 2000) {
  2045.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  2046.       if ((ai.bufferingBar |= pct > 0 && pct < 50))
  2047.         App.setBar(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  2048.     }
  2049.   }
  2050.  
  2051.   static progressDone() {
  2052.     this.removeEventListener('progress', PopupVideo.progress);
  2053.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`)) {
  2054.       App.setBar(false);
  2055.       App.updateFileInfo();
  2056.     }
  2057.   }
  2058. }
  2059.  
  2060. class Gallery {
  2061.  
  2062.   static makeParser(g) {
  2063.     return (
  2064.       typeof g === 'function' ? g :
  2065.         typeof g === 'string' ? Util.newFunction('text', 'doc', 'url', 'm', 'rule', 'cb', g) :
  2066.           Gallery.defaultParser
  2067.     );
  2068.   }
  2069.  
  2070.   static findIndex(gUrl) {
  2071.     const sel = gUrl.split('#')[1];
  2072.     if (!sel)
  2073.       return 0;
  2074.     if (/^\d+$/.test(sel))
  2075.       return parseInt(sel);
  2076.     for (let i = ai.gItems.length; i--;) {
  2077.       let {url} = ai.gItems[i];
  2078.       if (Array.isArray(url))
  2079.         url = url[0];
  2080.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  2081.         return i;
  2082.     }
  2083.     return 0;
  2084.   }
  2085.  
  2086.   static next(dir) {
  2087.     if (dir > 0 && (ai.gIndex += dir) >= ai.gItems.length) {
  2088.       ai.gIndex = 0;
  2089.     } else if (dir < 0 && (ai.gIndex += dir) < 0) {
  2090.       ai.gIndex = ai.gItems.length - 1;
  2091.     }
  2092.     const item = ai.gItems[ai.gIndex];
  2093.     if (Array.isArray(item.url)) {
  2094.       ai.urls = item.url.slice(1);
  2095.       ai.url = item.url[0];
  2096.     } else {
  2097.       ai.urls = null;
  2098.       ai.url = item.url;
  2099.     }
  2100.     Popup.destroy();
  2101.     Popup.startSingle();
  2102.     App.updateFileInfo();
  2103.     Gallery.preload(dir);
  2104.   }
  2105.  
  2106.   static preload(dir) {
  2107.     const i = ai.gIndex + dir;
  2108.     if (ai.popup && i >= 0 && i < ai.gItems.length) {
  2109.       ai.preloadUrl = ensureArray(ai.gItems[i].url)[0];
  2110.       ai.popup.addEventListener('load', Gallery.preloadOnLoad, {once: true});
  2111.     }
  2112.   }
  2113.  
  2114.   static preloadOnLoad() {
  2115.     $create('img', {src: ai.preloadUrl});
  2116.   }
  2117.  
  2118.   static defaultParser(text, doc, docUrl, m, rule) {
  2119.     const {g} = rule;
  2120.     const qEntry = g.entry;
  2121.     const qCaption = ensureArray(g.caption);
  2122.     const qImage = g.image;
  2123.     const qTitle = g.title;
  2124.     const fix =
  2125.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  2126.       (s => s.trim());
  2127.     const items = [...$$(qEntry || qImage, doc)]
  2128.       .map(processEntry)
  2129.       .filter(Boolean);
  2130.     items.title = processTitle();
  2131.     return items;
  2132.  
  2133.     function processEntry(entry) {
  2134.       const item = {};
  2135.       try {
  2136.         const img = qEntry ? $(qImage, entry) : entry;
  2137.         item.url = fix(Remoting.findFileUrl(img, docUrl), true);
  2138.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  2139.       } catch (e) {}
  2140.       return item.url && item;
  2141.     }
  2142.  
  2143.     function processCaption(selector) {
  2144.       const el = $(selector, this) ||
  2145.                  $orSelf(selector, this.previousElementSibling) ||
  2146.                  $orSelf(selector, this.nextElementSibling);
  2147.       return el && fix(el.textContent);
  2148.     }
  2149.  
  2150.     function processTitle() {
  2151.       const el = $(qTitle, doc);
  2152.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  2153.     }
  2154.  
  2155.     function $orSelf(selector, el) {
  2156.       if (el && !el.matches(qEntry))
  2157.         return el.matches(selector) ? el : $(selector, el);
  2158.     }
  2159.   }
  2160. }
  2161.  
  2162. class Remoting {
  2163.  
  2164.   static gmXhr(url, opts = {}) {
  2165.     if (ai.req)
  2166.       tryCatch.call(ai.req, ai.req.abort);
  2167.     return new Promise((resolve, reject) => {
  2168.       opts.url = url;
  2169.       if (!opts.method)
  2170.         opts.method = 'GET';
  2171.       opts.onload = opts.onerror = e => {
  2172.         ai.req = null;
  2173.         e.status < 400 && !e.error ?
  2174.           resolve(e) :
  2175.           reject(`Server error ${e.status} ${e.error}\nURL: ${url}`);
  2176.       };
  2177.       opts.timeout = opts.timeout || 10e3;
  2178.       opts.ontimeout = () => {
  2179.         ai.req = null;
  2180.         reject(`Timeout fetching ${url}`);
  2181.       };
  2182.       ai.req = GM_xmlhttpRequest(opts);
  2183.     });
  2184.   }
  2185.  
  2186.   static async getDoc(url) {
  2187.     const r = await (!ai.post ?
  2188.       Remoting.gmXhr(url) :
  2189.       Remoting.gmXhr(url, {
  2190.         method: 'POST',
  2191.         data: ai.post,
  2192.         headers: {
  2193.           'Content-Type': 'application/x-www-form-urlencoded',
  2194.           'Referer': url,
  2195.         },
  2196.       }));
  2197.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2198.     return r;
  2199.   }
  2200.  
  2201.   static async getImage(url, pageUrl) {
  2202.     ai.bufferingBar = false;
  2203.     ai.bufferingStart = Date.now();
  2204.     const response = await Remoting.gmXhr(url, {
  2205.       responseType: 'blob',
  2206.       headers: {
  2207.         'Accept': 'image/png,image/*;q=0.8,*/*;q=0.5',
  2208.         'Referer': pageUrl,
  2209.       },
  2210.       onprogress: Remoting.getImageProgress,
  2211.     });
  2212.     App.setBar(false);
  2213.     const type = Remoting.guessMimeType(response);
  2214.     let b = response.response;
  2215.     if (b.type !== type)
  2216.       b = b.slice(0, b.size, type);
  2217.     return ai.xhr === 'data' ?
  2218.       Remoting.blobToDataUrl(b) :
  2219.       URL.createObjectURL(b);
  2220.   }
  2221.  
  2222.   static getImageProgress(e) {
  2223.     if (!ai.bufferingBar && Date.now() - ai.bufferingStart > 3000 && e.loaded / e.total < 0.5)
  2224.       ai.bufferingBar = true;
  2225.     if (ai.bufferingBar) {
  2226.       const pct = e.loaded / e.total * 100 | 0;
  2227.       const size = e.total / 1024 | 0;
  2228.       App.setBar(`${pct}% of ${size} kiB`, 'xhr');
  2229.     }
  2230.   }
  2231.  
  2232.   static async findRedirect() {
  2233.     try {
  2234.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2235.         method: 'HEAD',
  2236.         headers: {
  2237.           'Referer': location.href.split('#', 1)[0],
  2238.         },
  2239.       });
  2240.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2241.       if (!info || !info.url)
  2242.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2243.       Object.assign(ai, info);
  2244.       Popup.startSingle();
  2245.     } catch (e) {
  2246.       App.handleError(e);
  2247.     }
  2248.   }
  2249.  
  2250.   static async saveFile() {
  2251.     let url = ai.popup.src || ai.popup.currentSrc;
  2252.     let name = Remoting.getFileName(ai.imageUrl || url);
  2253.     if (!name.includes('.'))
  2254.       name += '.jpg';
  2255.     try {
  2256.       if (!url.startsWith('blob:') && !url.startsWith('data:')) {
  2257.         const {response} = await Remoting.gmXhr(url, {
  2258.           responseType: 'blob',
  2259.           headers: {'Referer': url},
  2260.         });
  2261.         url = URL.createObjectURL(response);
  2262.         setTimeout(() => URL.revokeObjectURL(url), 1000);
  2263.       }
  2264.       $create('a', {href: url, download: name})
  2265.         .dispatchEvent(new MouseEvent('click'));
  2266.     } catch (e) {
  2267.       App.setBar(`Could not download ${name}.`, 'error');
  2268.     }
  2269.   }
  2270.  
  2271.   static getFileName(url) {
  2272.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2273.   }
  2274.  
  2275.   static blobToDataUrl(blob) {
  2276.     return new Promise((resolve, reject) => {
  2277.       const fr = new FileReader();
  2278.       fr.onload = () => resolve(fr.result);
  2279.       fr.onerror = reject;
  2280.       fr.readAsDataURL(blob);
  2281.     });
  2282.   }
  2283.  
  2284.   static guessMimeType({responseHeaders, finalUrl}) {
  2285.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2286.         !RegExp.$1.includes('text/plain'))
  2287.       return RegExp.$1;
  2288.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2289.     switch (ext.toLowerCase()) {
  2290.       case 'bmp': return 'image/bmp';
  2291.       case 'gif': return 'image/gif';
  2292.       case 'jpe': return 'image/jpeg';
  2293.       case 'jpeg': return 'image/jpeg';
  2294.       case 'jpg': return 'image/jpeg';
  2295.       case 'mp4': return 'video/mp4';
  2296.       case 'png': return 'image/png';
  2297.       case 'svg': return 'image/svg+xml';
  2298.       case 'tif': return 'image/tiff';
  2299.       case 'tiff': return 'image/tiff';
  2300.       case 'webm': return 'video/webm';
  2301.       default: return 'application/octet-stream';
  2302.     }
  2303.   }
  2304.  
  2305.   static findFileUrl(n, url) {
  2306.     const base = $('base[href]', n.ownerDocument);
  2307.     const path =
  2308.       n.getAttribute('src') ||
  2309.       n.getAttribute('data-m4v') ||
  2310.       n.getAttribute('href') ||
  2311.       n.getAttribute('content') ||
  2312.       /https?:\/\/[./a-z0-9_+%-]+\.(jpe?g|gif|png|svg|webm|mp4)/i.exec(n.outerHTML) &&
  2313.         RegExp.lastMatch;
  2314.     return path ? Util.rel2abs(path.trim(), base ? base.getAttribute('href') : url) : false;
  2315.   }
  2316. }
  2317.  
  2318. class Util {
  2319.  
  2320.   static addStyle(name, css) {
  2321.     const id = `${PREFIX}style:${name}`;
  2322.     const el = doc.getElementById(id) ||
  2323.                css && $create('style', {id});
  2324.     if (!el)
  2325.       return;
  2326.     if (el.textContent !== css)
  2327.       el.textContent = css;
  2328.     if (el.parentElement !== doc.head)
  2329.       doc.head.appendChild(el);
  2330.     return el;
  2331.   }
  2332.  
  2333.   static deepEqual(a, b) {
  2334.     if (typeof a !== typeof b)
  2335.       return false;
  2336.     if (!a || !b || typeof a !== 'object')
  2337.       return a === b;
  2338.     if (Array.isArray(a))
  2339.       return Array.isArray(b) &&
  2340.              a.length === b.length &&
  2341.              a.every((v, i) => Util.deepEqual(v, b[i]));
  2342.     const keys = Object.keys(a);
  2343.     return keys.length === Object.keys(b).length &&
  2344.            keys.every(k => Util.deepEqual(a[k], b[k]));
  2345.   }
  2346.  
  2347.   static findScale(url, parent) {
  2348.     const imgs = $$('img, video', parent);
  2349.     for (let i = imgs.length, img; (img = imgs[--i]);) {
  2350.       if ((img.src || img.currentSrc) !== url)
  2351.         continue;
  2352.       const scaleX = (img.naturalWidth || img.videoWidth) / img.offsetWidth;
  2353.       const scaleY = (img.naturalHeight || img.videoHeight) / img.offsetHeight;
  2354.       const s = Math.max(scaleX, scaleY);
  2355.       if (isFinite(s))
  2356.         return s;
  2357.     }
  2358.   }
  2359.  
  2360.   static forceLayout(node) {
  2361.     // eslint-disable-next-line no-unused-expressions
  2362.     node.clientHeight;
  2363.   }
  2364.  
  2365.   static formatError(e, rule) {
  2366.     let {message} = e;
  2367.     if (!message) {
  2368.       if (e.readyState)
  2369.         message = 'Request failed.';
  2370.       else if (e.type === 'error')
  2371.         message = "File can't be displayed." + (
  2372.           $('div[bgactive*="flashblock"]', doc) ?
  2373.             ' Check Flashblock settings.' :
  2374.             '');
  2375.       else
  2376.         message = e;
  2377.     }
  2378.     const m = [
  2379.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2380.       ['', 'font-weight:normal;color:unset'],
  2381.     ];
  2382.     if (rule.u)
  2383.       m.push(['Url simple match: %o', rule.u]);
  2384.     if (rule.r)
  2385.       m.push(['RegExp match: %o', rule.r]);
  2386.     if (ai.url)
  2387.       m.push(['URL: %s', ai.url]);
  2388.     if (ai.imageUrl && ai.imageUrl !== ai.url)
  2389.       m.push(['File: %s', ai.imageUrl]);
  2390.     m.push(['Node: %o', ai.node]);
  2391.     return {
  2392.       message,
  2393.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2394.       consoleArgs: m.map(([, v]) => v),
  2395.     };
  2396.   }
  2397.  
  2398.   static lazyGetRect(obj, node, selector) {
  2399.     return Object.defineProperty(obj, 'rect', {
  2400.       configurable: true,
  2401.       get() {
  2402.         const value = Util.rect(node, selector);
  2403.         Object.defineProperty(obj, 'rect', {value, configurable: true});
  2404.         return value;
  2405.       },
  2406.     });
  2407.   }
  2408.  
  2409.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2410.   static maybeDecodeURL(url) {
  2411.     if (!url)
  2412.       return url;
  2413.     const iPct = url.indexOf('%');
  2414.     const iColon = url.indexOf(':');
  2415.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2416.       decodeURIComponent(url) :
  2417.       url;
  2418.   }
  2419.  
  2420.   static newFunction(...args) {
  2421.     try {
  2422.       return App.NOP || new Function(...args);
  2423.     } catch (e) {
  2424.       if (!e.message.includes('unsafe-eval'))
  2425.         throw e;
  2426.       App.NOP = () => {};
  2427.       return App.NOP;
  2428.     }
  2429.   }
  2430.  
  2431.   static rect(node, selector) {
  2432.     let n = selector && node.closest(selector);
  2433.     if (n)
  2434.       return n.getBoundingClientRect();
  2435.     const nested = node.getElementsByTagName('*');
  2436.     let maxArea = 0;
  2437.     let maxBounds;
  2438.     n = node;
  2439.     for (let i = 0; n; n = nested[i++]) {
  2440.       const bounds = n.getBoundingClientRect();
  2441.       const area = bounds.width * bounds.height;
  2442.       if (area > maxArea) {
  2443.         maxArea = area;
  2444.         maxBounds = bounds;
  2445.         node = n;
  2446.       }
  2447.     }
  2448.     return maxBounds;
  2449.   }
  2450.  
  2451.   static rel2abs(rel, abs) {
  2452.     if (rel.startsWith('data:'))
  2453.       return rel;
  2454.     const rx = /^([a-z]+:)\/\//;
  2455.     if (rx.test(rel))
  2456.       return rel;
  2457.     if (!rx.test(abs))
  2458.       return;
  2459.     if (rel.indexOf('//') === 0)
  2460.       return RegExp.$1 + rel;
  2461.     if (rel[0] === '/')
  2462.       return abs.substr(0, abs.indexOf('/', RegExp.lastMatch.length)) + rel;
  2463.     return abs.substr(0, abs.lastIndexOf('/')) + '/' + rel;
  2464.   }
  2465.  
  2466.   static suppressHoverTooltip() {
  2467.     for (const n of [
  2468.       ai.node.parentNode,
  2469.       ai.node,
  2470.       ai.node.firstElementChild,
  2471.     ]) {
  2472.       if (n &&
  2473.           n.title &&
  2474.           n.title !== n.textContent &&
  2475.           !doc.title.includes(n.title) &&
  2476.           !/^http\S+$/.test(n.title)) {
  2477.         ai.tooltip = {
  2478.           node: n,
  2479.           text: n.title,
  2480.         };
  2481.         n.title = '';
  2482.         break;
  2483.       }
  2484.     }
  2485.   }
  2486.  
  2487.   static tabFixUrl() {
  2488.     return `data:text/html;charset=utf8,
  2489.       <style>
  2490.         body {
  2491.           margin: 0;
  2492.           padding: 0;
  2493.           background: #222
  2494.         }
  2495.         .fit {
  2496.           overflow: hidden
  2497.         }
  2498.         .fit > img {
  2499.           max-width: 100vw;
  2500.           max-height: 100vh
  2501.         }
  2502.         body > img {
  2503.           margin: auto;
  2504.           position: absolute;
  2505.           left: 0;
  2506.           right: 0;
  2507.           top: 0;
  2508.           bottom: 0
  2509.         }
  2510.       </style>
  2511.       <body class="fit">
  2512.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2513.       </body>
  2514.     `.replace(/[\r\n]+\s*/g, '').replace(/#/g, '%23');
  2515.   }
  2516. }
  2517.  
  2518. function $(s, n = doc) {
  2519.   return n.querySelector(s);
  2520. }
  2521.  
  2522. function $$(s, n = doc) {
  2523.   return n.querySelectorAll(s);
  2524. }
  2525.  
  2526. function $many(q, doc) {
  2527.   for (const selector of q ? ensureArray(q) : []) {
  2528.     const el = $(selector, doc);
  2529.     if (el)
  2530.       return el;
  2531.   }
  2532. }
  2533.  
  2534. function $create(tag, props) {
  2535.   return Object.assign(document.createElement(tag), props);
  2536. }
  2537.  
  2538. function safeIncludes(a, b) {
  2539.   return typeof a === 'string' && a.includes(b);
  2540. }
  2541.  
  2542. function clamp(v, min, max) {
  2543.   return v < min ? min : v > max ? max : v;
  2544. }
  2545.  
  2546. function ensureArray(v) {
  2547.   return Array.isArray(v) ? v : [v];
  2548. }
  2549.  
  2550. function tryCatch(fn, ...args) {
  2551.   try {
  2552.     return fn.apply(this, args);
  2553.   } catch (e) {}
  2554. }
  2555.  
  2556. function setup({rule} = {}) {
  2557.   const MPIV_BASE_URL = 'https://w9p.co/userscripts/mpiv/';
  2558.   const SETUP_ID = `${PREFIX}setup`;
  2559.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2560.   let div = doc.getElementById(SETUP_ID);
  2561.   let root = div && div.shadowRoot;
  2562.   let {blankRuleElement} = setup;
  2563.   /** @type NodeList */
  2564.   const UI = new Proxy({}, {
  2565.     get(_, id) {
  2566.       return root.getElementById(id);
  2567.     },
  2568.   });
  2569.   if (!rule || !div)
  2570.     init(new Config({save: true}));
  2571.   if (rule)
  2572.     installRule(rule);
  2573.  
  2574.   function closeSetup(event) {
  2575.     if (event && this.id !== 'x') {
  2576.       cfg = collectConfig({save: true, clone: this.id === 'apply'});
  2577.       Ruler.init();
  2578.       if (this.id === 'apply')
  2579.         return;
  2580.     }
  2581.     const el = doc.getElementById(SETUP_ID);
  2582.     el && el.remove();
  2583.   }
  2584.  
  2585.   function collectConfig({save, clone} = {}) {
  2586.     const delay = parseInt(UI.delay.value);
  2587.     const scale = parseFloat(UI.scale.value.replace(',', '.'));
  2588.     let data = {
  2589.       css: UI.css.value.trim(),
  2590.       delay: !isNaN(delay) && delay >= 0 ? delay : undefined,
  2591.       hosts: collectRules(),
  2592.       scale: !isNaN(scale) ? Math.max(1, scale) : undefined,
  2593.       scales: UI.scales.value
  2594.         .trim()
  2595.         .split(/[,;]*\s+/)
  2596.         .map(x => x.replace(',', '.'))
  2597.         .filter(x => !isNaN(parseFloat(x))),
  2598.       start: UI.start.value,
  2599.       zoom: UI.zoom.value,
  2600.       zoomOut: UI.zoomOut.value,
  2601.     };
  2602.     for (const el of $$('[type="checkbox"]', root))
  2603.       data[el.id] = el.checked;
  2604.     if (clone)
  2605.       data = JSON.parse(JSON.stringify(data));
  2606.     return new Config({data, save});
  2607.   }
  2608.  
  2609.   function collectRules() {
  2610.     return [...UI.rules.children]
  2611.       .map(el => [el.value.trim(), el[RULE]])
  2612.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2613.       .map(([s, json]) => json || s)
  2614.       .filter(Boolean);
  2615.   }
  2616.  
  2617.   function exportSettings(e) {
  2618.     Events.drop(e);
  2619.     const txt = $create('textarea', {
  2620.       style: 'opacity:0; position:absolute',
  2621.       value: JSON.stringify(collectConfig(), null, '  '),
  2622.     });
  2623.     root.appendChild(txt);
  2624.     txt.select();
  2625.     txt.focus();
  2626.     document.execCommand('copy');
  2627.     e.target.focus();
  2628.     txt.remove();
  2629.     UI.exportNotification.hidden = false;
  2630.     setTimeout(() => (UI.exportNotification.hidden = true), 1000);
  2631.   }
  2632.  
  2633.   function importSettings(e) {
  2634.     Events.drop(e);
  2635.     const s = prompt('Paste settings:');
  2636.     if (s)
  2637.       init(new Config({data: s}));
  2638.   }
  2639.  
  2640.   function checkRule({target: el}) {
  2641.     let json, error;
  2642.     const prev = el.previousElementSibling;
  2643.     if (el.value) {
  2644.       json = Ruler.parse(el.value);
  2645.       error = json instanceof Error && (json.message || String(json));
  2646.       if (!prev)
  2647.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2648.     } else if (prev) {
  2649.       prev.focus();
  2650.       el.remove();
  2651.     }
  2652.     el[RULE] = !error && json;
  2653.     el.title = error || '';
  2654.     el.setCustomValidity(error || '');
  2655.   }
  2656.  
  2657.   function focusRule({type, target: el, relatedTarget: from}) {
  2658.     if (el === this)
  2659.       return;
  2660.     if (type === 'paste') {
  2661.       setTimeout(() => focusRule.call(this, {target: el}));
  2662.       return;
  2663.     }
  2664.     if (el[RULE])
  2665.       el.value = Ruler.format(el[RULE], {expand: true});
  2666.     const h = clamp(el.scrollHeight, 15, div.clientHeight / 4);
  2667.     if (h > el.offsetHeight)
  2668.       el.style.minHeight = h + 'px';
  2669.     if (!this.contains(from))
  2670.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2671.     if (from) {
  2672.       from.style.minHeight = '';
  2673.       if (from[RULE])
  2674.         from.value = Ruler.format(from[RULE]);
  2675.     }
  2676.   }
  2677.  
  2678.   function installRule(rule) {
  2679.     const inputs = UI.rules.children;
  2680.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2681.     if (!el) {
  2682.       el = inputs[0];
  2683.       el[RULE] = rule;
  2684.       el.value = Ruler.format(rule);
  2685.       el.hidden = false;
  2686.       const i = Math.max(0, collectRules().indexOf(rule));
  2687.       inputs[i].insertAdjacentElement('afterend', el);
  2688.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2689.     }
  2690.     const rect = el.getBoundingClientRect();
  2691.     if (rect.bottom < 0 ||
  2692.         rect.bottom > el.parentNode.offsetHeight)
  2693.       el.scrollIntoView();
  2694.     el.classList.add('highlight');
  2695.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2696.     el.focus();
  2697.   }
  2698.  
  2699.   function init(config) {
  2700.     closeSetup();
  2701.     div = $create('div', {
  2702.       id: SETUP_ID,
  2703.       // prevent the main page from interpreting key presses in inputs as hotkeys
  2704.       // which may happen since it sees only the outer <div> in the event |target|
  2705.       contentEditable: true,
  2706.     });
  2707.     root = div.attachShadow({mode: 'open'});
  2708.     root.innerHTML = `
  2709.       <style>
  2710.         :host {
  2711.           all: initial !important;
  2712.           position: fixed !important;
  2713.           z-index: 2147483647 !important;
  2714.           top: 20px !important;
  2715.           right: 20px !important;
  2716.           padding: 20px 30px !important;
  2717.           color: #000 !important;
  2718.           background: #eee !important;
  2719.           box-shadow: 5px 5px 25px 2px #000 !important;
  2720.           width: 500px !important;
  2721.           border: 1px solid black !important;
  2722.           display: flex !important;
  2723.           flex-direction: column !important;
  2724.         }
  2725.         main {
  2726.           font: 12px/15px sans-serif;
  2727.         }
  2728.         ul {
  2729.           max-height: calc(100vh - 200px);
  2730.           margin: 10px 0 15px 0;
  2731.           padding: 0;
  2732.           list-style: none;
  2733.         }
  2734.         li {
  2735.           margin: 0;
  2736.           padding: .25em 0;
  2737.         }
  2738.         li.options {
  2739.           display: flex;
  2740.           align-items: center;
  2741.           flex-wrap: wrap;
  2742.         }
  2743.         label {
  2744.           display: inline-flex;
  2745.           align-items: center;
  2746.         }
  2747.         label:not(:last-child) {
  2748.           margin-right: 1em;
  2749.         }
  2750.         label > :not(span) {
  2751.           margin-right: .25em;
  2752.         }
  2753.         label > :not(span):not(:first-child) {
  2754.           margin-left: .5em;
  2755.         }
  2756.         input:first-child {
  2757.           margin-left: 0;
  2758.         }
  2759.         input, select {
  2760.           min-height: 1.6em;
  2761.           box-sizing: border-box;
  2762.         }
  2763.         textarea {
  2764.           flex: 1;
  2765.           resize: vertical;
  2766.           margin: 1px 0;
  2767.           font: 11px/1.25 Consolas, monospace;
  2768.         }
  2769.         textarea:invalid {
  2770.           background-color: #f002;
  2771.           border-color: #800;
  2772.         }
  2773.         code {
  2774.           font-weight: bold;
  2775.         }
  2776.         a {
  2777.           text-decoration: none;
  2778.         }
  2779.         a:hover {
  2780.           text-decoration: underline;
  2781.         }
  2782.         button {
  2783.           padding: .2em 1em;
  2784.           margin: 0 1em;
  2785.         }
  2786.         .column {
  2787.           display: flex;
  2788.           flex-direction: column;
  2789.         }
  2790.         .highlight {
  2791.           animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  2792.           animation-fill-mode: both;
  2793.         }
  2794.         #rules textarea {
  2795.           word-break: break-all;
  2796.         }
  2797.         #x {
  2798.           position: absolute;
  2799.           top: 0;
  2800.           right: 0;
  2801.           padding: 4px 8px;
  2802.           cursor: pointer;
  2803.           user-select: none;
  2804.         }
  2805.         #x:hover {
  2806.           background-color: #8884;
  2807.         }
  2808.         @keyframes fade-in {
  2809.           from { background-color: deepskyblue }
  2810.           to {}
  2811.         }
  2812.         @media (prefers-color-scheme: dark) {
  2813.           :host {
  2814.             color: #aaa !important;
  2815.             background: #333 !important;
  2816.           }
  2817.           a {
  2818.             color: deepskyblue;
  2819.           }
  2820.           textarea, input, select {
  2821.             background: #111;
  2822.             color: #BBB;
  2823.             border-color: #555;
  2824.           }
  2825.           input[type="checkbox"] {
  2826.             filter: invert(1);
  2827.           }
  2828.         }
  2829.       </style>
  2830.       <main>
  2831.         <a href="${MPIV_BASE_URL}">${GM_info.script.name}</a>
  2832.         <div id="x">x</div>
  2833.         <ul class="column">
  2834.           <li class="options">
  2835.             <label>
  2836.               <span>Popup:</span>
  2837.               <select id="start">
  2838.                 <option value="auto">automatically
  2839.                 <option value="context">right click or ctrl
  2840.                 <option value="ctrl">ctrl
  2841.               </select>
  2842.             </label>
  2843.             <label>
  2844.               <span>after</span>
  2845.               <input id="delay" type="number" min="0" max="10000" step="50" style="width: 4em">
  2846.               <span>ms</span>
  2847.             </label>
  2848.             <label>
  2849.               <input type="checkbox" id="preload">
  2850.               <span>Start preloading immediately</span>
  2851.             </label>
  2852.           </li>
  2853.           <li class="options">
  2854.             <label>
  2855.               <span>Zoom:</span>
  2856.               <select id="zoom">
  2857.                 <option value="context">right click or shift
  2858.                 <option value="wheel">wheel up or shift
  2859.                 <option value="shift">shift
  2860.                 <option value="auto">automatically
  2861.               </select>
  2862.             </label>
  2863.             <label>
  2864.               <span>When zoomed out completely</span>
  2865.               <select id="zoomOut">
  2866.                 <option value="stay">stay in zoom mode
  2867.                 <option value="auto">stay if still hovered
  2868.                 <option value="close">close popup
  2869.               </select>
  2870.             </label>
  2871.           </li>
  2872.           <li class="options">
  2873.             <label>
  2874.               <span>Only show popup over scaled-down image when natural size is</span>
  2875.               <input id="scale" type="number" min="1" max="100" step=".05" style="width: 4em;">
  2876.               <span>times larger</span>
  2877.             </label>
  2878.           </li>
  2879.           <li class="options">
  2880.             <label>
  2881.               <span>Custom scale factors:</span>
  2882.               <input id="scales" style="width: 18em"
  2883.                      placeholder="${Config.DEFAULTS.scales.join(' ')}">
  2884.               <span title="${`
  2885.                 0 = fit to window
  2886.                 0! = same as 0 but also removes smaller values
  2887.                 * after value marks default zoom factor, example 1*
  2888.                 Values smaller than non-zoomed size are ignored.
  2889.               `.trim().replace(/\n\s+/g, '\n')}" style="cursor:help">(?)</span>
  2890.             </label>
  2891.           </li>
  2892.           <li class="options">
  2893.             <label><input type="checkbox" id="center"><span>Always centered</span></label>
  2894.             <label><input type="checkbox" id="imgtab"><span>Run in image tabs</span></label>
  2895.             <label title="Disable only if you spoof the HTTP headers yourself">
  2896.               <input type="checkbox" id="xhr">
  2897.               <span>Anti-hotlinking workaround</span>
  2898.             </label>
  2899.             <label>
  2900.               <input type="checkbox" id="globalStatus">
  2901.               <span>Expose status on &lt;html&gt; node (note: may cause noticeable slowdown)</small>
  2902.             </label>
  2903.           </li>
  2904.           <li>
  2905.             <div class="column">
  2906.               <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>
  2907.               <textarea id="css" spellcheck="false"></textarea>
  2908.             </div>
  2909.           </li>
  2910.           <li style="display: flex; justify-content: space-between;">
  2911.             <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  2912.             <div style="white-space: nowrap">
  2913.               To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  2914.               in "d" value, for example <code>"d": "!foo.com"</code>
  2915.             </div>
  2916.             <div>
  2917.               <input id="search" type="search" placeholder="Search"
  2918.                      style="width: 10em; margin-left: 1em">
  2919.             </div>
  2920.           </li>
  2921.           <li style="
  2922.             overflow-y: auto;
  2923.             margin-left: -3px;
  2924.             margin-right: -3px;
  2925.             padding-left: 3px;
  2926.             padding-right: 3px;
  2927.           ">
  2928.             <div id="rules" class="column">
  2929.               <textarea rows="1" spellcheck="false"></textarea>
  2930.             </div>
  2931.           </li>
  2932.           <li>
  2933.             <div hidden id="installLoading">
  2934.               Loading...
  2935.             </div>
  2936.             <div hidden id="installHint">
  2937.               Double-click the rule (or select and press Enter) to add it. Click OK when done.
  2938.             </div>
  2939.             <a href="${MPIV_BASE_URL}more_host_rules.html" id="install">
  2940.               Install rule from repository...</a>
  2941.           </li>
  2942.         </ul>
  2943.         <div style="text-align:center">
  2944.           <button id="ok" accesskey="s">Save</button>
  2945.           <button id="apply" accesskey="a">Apply</button>
  2946.           <button id="import" style="margin-right: 0">Import</button>
  2947.           <button id="export" style="margin-left: 0">Export</button>
  2948.           <button id="cancel">Cancel</button>
  2949.           <div id="exportNotification" hidden style="
  2950.             color: green;
  2951.             position: absolute;
  2952.             bottom: 2px;
  2953.             left: 0;
  2954.             right: 0;
  2955.             font-weight: bold;">Copied to clipboard.</div>
  2956.         </div>
  2957.       </main>
  2958.     `;
  2959.     // rules
  2960.     const rules = UI.rules;
  2961.     rules.addEventListener('input', checkRule);
  2962.     rules.addEventListener('focusin', focusRule);
  2963.     rules.addEventListener('paste', focusRule);
  2964.     blankRuleElement =
  2965.       setup.blankRuleElement =
  2966.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2967.     for (const rule of config.hosts || []) {
  2968.       const el = blankRuleElement.cloneNode();
  2969.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2970.       rules.appendChild(el);
  2971.       checkRule({target: el});
  2972.     }
  2973.     // search rules
  2974.     const search = UI.search;
  2975.     search.oninput = () => {
  2976.       setup.search = search.value;
  2977.       const s = search.value.toLowerCase();
  2978.       for (const el of rules.children)
  2979.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2980.     };
  2981.     search.value = setup.search || '';
  2982.     if (search.value)
  2983.       search.oninput();
  2984.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2985.     // which may happen since it sees only the outer <div> in the event |target|
  2986.     root.addEventListener('keydown', e =>
  2987.       !e.altKey && !e.ctrlKey && !e.metaKey && e.stopPropagation(), true);
  2988.     UI.apply.onclick = UI.cancel.onclick = UI.ok.onclick = UI.x.onclick = closeSetup;
  2989.     UI.css.value = config.css;
  2990.     UI.delay.value = config.delay;
  2991.     UI.export.onclick = exportSettings;
  2992.     UI.import.onclick = importSettings;
  2993.     UI.install.onclick = setupRuleInstaller;
  2994.     UI.scale.value = config.scale;
  2995.     UI.scales.value = config.scales.join(' ');
  2996.     UI.start.value = config.start;
  2997.     UI.start.onchange = function () {
  2998.       UI.delay.closest('label').hidden =
  2999.         UI.preload.closest('label').hidden =
  3000.           this.value !== 'auto';
  3001.     };
  3002.     UI.start.onchange();
  3003.     UI.xhr.onclick = ({target: el}) => el.checked || confirm(el.closest('[title]').title);
  3004.     UI.zoom.value = config.zoom;
  3005.     UI.zoomOut.value = config.zoomOut;
  3006.     for (const el of $$('[type="checkbox"]', root))
  3007.       el.checked = config[el.id];
  3008.     for (const el of $$('a[href^="http"]', root)) {
  3009.       el.target = '_blank';
  3010.       el.rel = 'noreferrer noopener external';
  3011.     }
  3012.     doc.body.appendChild(div);
  3013.     requestAnimationFrame(() => {
  3014.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, div.clientHeight / 4) + 'px';
  3015.     });
  3016.   }
  3017. }
  3018.  
  3019. async function setupRuleInstaller(e) {
  3020.   Events.drop(e);
  3021.   const parent = this.parentElement;
  3022.   parent.children.installLoading.hidden = false;
  3023.   this.remove();
  3024.   let rules;
  3025.  
  3026.   try {
  3027.     rules = extractRules((await Remoting.getDoc(this.href)).doc);
  3028.     const selector = $create('select', {
  3029.       size: 8,
  3030.       style: 'width: 100%',
  3031.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3032.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3033.     });
  3034.     selector.append(...rules.map(renderRule));
  3035.     selector.selectedIndex = findMatchingRuleIndex();
  3036.     // remove "name" since the installed rules don't need it
  3037.     for (const r of rules)
  3038.       delete r.name;
  3039.     parent.children.installLoading.remove();
  3040.     parent.children.installHint.hidden = false;
  3041.     parent.appendChild(selector);
  3042.   } catch (e) {
  3043.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3044.   }
  3045.  
  3046.   function extractRules(doc) {
  3047.     const code = $('script', doc).textContent;
  3048.     // sort by name
  3049.     return JSON.parse(code.match(/var\s+rules\s*=\s*(\[.+]);?[\r\n]/)[1])
  3050.       .filter(r => !r.d || hostname.includes(r.d))
  3051.       .sort((a, b) =>
  3052.         (a = a.name.toLowerCase()) < (b = b.name.toLowerCase()) ? -1 :
  3053.           a > b ? 1 :
  3054.             0);
  3055.   }
  3056.  
  3057.   function findMatchingRuleIndex() {
  3058.     // get the core part of the current domain that's not "www", "m", etc.
  3059.     const h = hostname.split('.');
  3060.     const core = h[0] === 'www' || h.length > 2 && h[0].length === 1 ? h[1] : h[0];
  3061.     // find a rule matching the domain core
  3062.     return rules.findIndex(r =>
  3063.       r.name.toLowerCase().includes(core) ||
  3064.       r.d && hostname.includes(r.d));
  3065.   }
  3066.  
  3067.   function renderRule(r) {
  3068.     const {name, ...copy} = r;
  3069.     return $create('option', {
  3070.       textContent: name,
  3071.       title: Ruler.format(copy, {expand: true})
  3072.         .replace(/^{|\s*}$/g, '')
  3073.         .split('\n')
  3074.         .slice(0, 12)
  3075.         .map(renderTitleLine)
  3076.         .filter(Boolean)
  3077.         .join('\n'),
  3078.     });
  3079.   }
  3080.  
  3081.   function renderTitleLine(line, i, arr) {
  3082.     return (
  3083.       // show ... on 10th line if there are more lines
  3084.       i === 9 && arr.length > 10 ? '...' :
  3085.         i > 10 ? '' :
  3086.           // truncate to 100 chars
  3087.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3088.             // strip the leading space
  3089.             .replace(/^\s/, ''));
  3090.   }
  3091.  
  3092.   function maybeSetup(e) {
  3093.     if (!e.altKey && !e.ctrlKey && !e.shiftKey && !e.metaKey)
  3094.       setup({rule: rules[e.currentTarget.selectedIndex]});
  3095.   }
  3096. }
  3097.  
  3098. App.init();