☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

目前为 2020-01-28 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     1.0.14
  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.       // example: "img[src*='icon']"
  65.       hosts: [{
  66.         name: 'No popup for YouTube thumbnails',
  67.         d: 'www.youtube.com',
  68.         e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  69.         s: '',
  70.       }, {
  71.         name: 'No popup for SVG/PNG icons',
  72.         d: '',
  73.         e: "img[src*='icon']",
  74.         r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  75.         s: '',
  76.       }],
  77.       imgtab: false,
  78.       preload: false,
  79.       scale: 1.25,
  80.       scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 5, 8, 16],
  81.       start: 'auto',
  82.       version: 6,
  83.       xhr: true,
  84.       zoom: 'context',
  85.       zoomOut: 'auto',
  86.     });
  87.     cfg = new Config({save: true});
  88.     App.isImageTab = doc.images.length === 1 &&
  89.                      doc.images[0].parentNode === doc.body &&
  90.                      !doc.links.length;
  91.     App.enabled = cfg.imgtab || !App.isImageTab;
  92.  
  93.     GM_registerMenuCommand('MPIV: configure', setup);
  94.     doc.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  95.  
  96.     if (isGoogleDomain && doc.getElementById('main'))
  97.       doc.getElementById('main').addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  98.  
  99.     if (trustedDomains.includes(hostname)) {
  100.       doc.addEventListener('click', e => {
  101.         const el = e.target.closest('blockquote, code, pre');
  102.         const text = el && el.textContent.trim();
  103.         let rule;
  104.         if (text && e.button === 0 &&
  105.             /^\s*{\s*"\w+"\s*:[\s\S]+}\s*$/.test(text) &&
  106.             (rule = tryCatch(JSON.parse, text))) {
  107.           setup({rule});
  108.           Events.drop(e);
  109.         }
  110.       });
  111.     }
  112.  
  113.     window.addEventListener('message', App.onMessageParent);
  114.   }
  115.  
  116.   /** @param {MessageEvent} e */
  117.   static onMessageParent(e) {
  118.     if (typeof e.data === 'string' && e.data.startsWith(POSTMSG_PREFIX)) {
  119.       for (const el of $$('iframe, frame')) {
  120.         if (el.contentWindow === e.source) {
  121.           const r = el.getBoundingClientRect();
  122.           const w = clamp(r.width, 0, innerWidth - r.left);
  123.           const h = clamp(r.height, 0, innerHeight - r.top);
  124.           e.source.postMessage(`${POSTMSG_PREFIX}${w}:${h}`, '*');
  125.         }
  126.       }
  127.     }
  128.   }
  129.  
  130.   /** @param {MessageEvent} e */
  131.   static onMessageChild(e) {
  132.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(POSTMSG_PREFIX)) {
  133.       const [width, height] = e.data.slice(POSTMSG_PREFIX.length).split(':').map(parseFloat);
  134.       if (width && height) {
  135.         ai.view = {width, height};
  136.         window.removeEventListener('message', App.onMessageChild);
  137.       }
  138.     }
  139.   }
  140.  
  141.   static activate(info, event) {
  142.     const force = event.ctrlKey;
  143.     if (!force) {
  144.       const scale = Util.findScale(info.url, info.node.parentNode);
  145.       if (scale && scale < cfg.scale)
  146.         return;
  147.     }
  148.     if (ai.node)
  149.       App.deactivate();
  150.     ai = info;
  151.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  152.     ai.view = {
  153.       width: view.clientWidth,
  154.       height: view.clientHeight,
  155.     };
  156.     if (window !== top) {
  157.       window.addEventListener('message', App.onMessageChild);
  158.       parent.postMessage(POSTMSG_PREFIX + 'getDimensions', '*');
  159.     }
  160.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  161.     Util.suppressHoverTooltip();
  162.     App.setListeners();
  163.     App.updateMouse(event);
  164.     if (force) {
  165.       Popup.start();
  166.     } else if (cfg.start === 'auto' && !ai.rule.manual) {
  167.       Popup.schedule();
  168.     } else {
  169.       App.setStatus('ready');
  170.     }
  171.   }
  172.  
  173.   static checkProgress({start} = {}) {
  174.     const p = ai.popup;
  175.     if (p) {
  176.       ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && 800;
  177.       ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && 1200;
  178.       if (ai.nheight) {
  179.         App.updateProgress();
  180.         clearInterval(ai.timerProgress);
  181.         clearTimeout(ai.timerStatus);
  182.         return;
  183.       }
  184.     }
  185.     if (start)
  186.       ai.timerProgress = setInterval(App.checkProgress, 150);
  187.   }
  188.  
  189.   static deactivate({wait} = {}) {
  190.     clearTimeout(ai.timer);
  191.     clearTimeout(ai.timerStatus);
  192.     clearInterval(ai.timerProgress);
  193.     if (ai.req)
  194.       tryCatch.call(ai.req, ai.req.abort);
  195.     if (ai.tooltip)
  196.       ai.tooltip.node.title = ai.tooltip.text;
  197.     App.setStatus(false);
  198.     App.setBar(false);
  199.     App.setListeners(false);
  200.     Popup.destroy();
  201.     if (wait) {
  202.       App.enabled = false;
  203.       setTimeout(App.enable, 200);
  204.     }
  205.     ai = {rule: {}};
  206.   }
  207.  
  208.   static enable() {
  209.     App.enabled = true;
  210.   }
  211.  
  212.   static handleError(e, rule = ai.rule) {
  213.     const fe = Util.formatError(e, rule);
  214.     if (!rule || !ai.urls || !ai.urls.length)
  215.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  216.     if (cfg.xhr && !ai.xhr && isGoogleImages) {
  217.       ai.xhr = true;
  218.       Popup.startSingle();
  219.     } else if (ai.urls && ai.urls.length) {
  220.       ai.url = ai.urls.shift();
  221.       ai.url ?
  222.         Popup.startSingle() :
  223.         App.deactivate();
  224.     } else if (ai.node) {
  225.       App.setStatus('error');
  226.       App.setBar(fe.message, 'error');
  227.     }
  228.   }
  229.  
  230.   static setBar(label, className) {
  231.     let b = ai.bar;
  232.     if (typeof label !== 'string') {
  233.       b && b.remove();
  234.       ai.bar = null;
  235.       return;
  236.     }
  237.     if (!b)
  238.       b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  239.     App.updateStyles();
  240.     App.updateTitle();
  241.     App.updateBar();
  242.     b.innerHTML = label;
  243.     if (!b.parentNode) {
  244.       doc.body.appendChild(b);
  245.       Util.forceLayout(b);
  246.     }
  247.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  248.   }
  249.  
  250.   static setListeners(enable = true) {
  251.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  252.     const passive = enable ? PASSIVE : undefined;
  253.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  254.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  255.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  256.     onOff.call(doc, 'contextmenu', Events.onContext);
  257.     onOff.call(doc, 'keydown', Events.onKeyDown);
  258.     onOff.call(doc, 'keyup', Events.onKeyUp);
  259.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  260.   }
  261.  
  262.   static setStatus(status) {
  263.     if (!status && !cfg.globalStatus) {
  264.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  265.       return;
  266.     }
  267.     const prefix = cfg.globalStatus ? PREFIX : '';
  268.     const action = status && /^[+-]/.test(status) && status[0];
  269.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  270.     const el = cfg.globalStatus ? doc.documentElement :
  271.       name === 'edge' ? ai.popup :
  272.         ai.node;
  273.     if (!el)
  274.       return;
  275.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  276.     const oldValue = (el.getAttribute(attr) || '').trim();
  277.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  278.     switch (action) {
  279.       case '-':
  280.         cls.delete(name);
  281.         break;
  282.       case false:
  283.         for (const c of cls)
  284.           if (c.startsWith(prefix) && c !== name)
  285.             cls.delete(c);
  286.         // fallthrough to +
  287.       case '+':
  288.         if (name)
  289.           cls.add(name);
  290.         break;
  291.     }
  292.     const newValue = [...cls].join(' ');
  293.     if (newValue !== oldValue)
  294.       el.setAttribute(attr, newValue);
  295.   }
  296.  
  297.   static setStatusLoading(force) {
  298.     if (!force) {
  299.       clearTimeout(ai.timerStatus);
  300.       ai.timerStatus = setTimeout(App.setStatusLoading, SETTLE_TIME, true);
  301.     } else if (!ai.popupLoaded) {
  302.       App.setStatus('+loading');
  303.     }
  304.   }
  305.  
  306.   static toggleZoom() {
  307.     const p = ai.popup;
  308.     if (!p || !ai.scales || ai.scales.length < 2)
  309.       return;
  310.     ai.zoom = !ai.zoom;
  311.     ai.zoomed = true;
  312.     const z = ai.scales.indexOf(ai.zscale);
  313.     ai.scale = ai.scales[ai.zoom ? (z > 0 ? z : 1) : 0];
  314.     if (ai.zooming)
  315.       p.classList.add(`${PREFIX}zooming`);
  316.     Popup.move();
  317.     App.updateTitle();
  318.     App.setStatus(ai.zoom ? 'zoom' : false);
  319.     if (!ai.zoom)
  320.       App.updateFileInfo();
  321.     return ai.zoom;
  322.   }
  323.  
  324.   static updateBar() {
  325.     if (ai.timerBar)
  326.       return;
  327.     clearTimeout(ai.timerBar);
  328.     ai.bar.style.removeProperty('opacity');
  329.     ai.timerBar = setTimeout(() => {
  330.       ai.timerBar = 0;
  331.       if (ai.bar)
  332.         ai.bar.style.setProperty('opacity', 0);
  333.     }, 3000);
  334.   }
  335.  
  336.   static updateCaption(text, doc = document) {
  337.     switch (typeof ai.rule.c) {
  338.       case 'function':
  339.         // don't specify as a parameter's default value, instead get the html only when needed
  340.         if (text === undefined)
  341.           text = doc.documentElement.outerHTML;
  342.         ai.caption = ai.rule.c(text, doc, ai.node, ai.rule);
  343.         break;
  344.       case 'string': {
  345.         const el = $many(ai.rule.c, doc);
  346.         ai.caption = !el ? '' :
  347.           el.getAttribute('content') ||
  348.           el.getAttribute('title') ||
  349.           el.textContent;
  350.         break;
  351.       }
  352.       default: {
  353.         ai.caption = (ai.tooltip || 0).text || ai.node.alt || '';
  354.         if (ai.caption)
  355.           return;
  356.         const el = ai.node.closest('a[title], img[title], video[title]');
  357.         if (el && (ai.caption = el.title || ''))
  358.           return;
  359.         const url = ai.node.src || (ai.node.closest('[href]') || 0).href;
  360.         ai.caption = url ? Remoting.getFileName(url) : '';
  361.       }
  362.     }
  363.   }
  364.  
  365.   static updateFileInfo() {
  366.     const gi = ai.gItems;
  367.     if (gi) {
  368.       const item = gi[ai.gIndex];
  369.       let c = gi.length > 1 ? '[' + (ai.gIndex + 1) + '/' + gi.length + '] ' : '';
  370.       if (ai.gIndex === 0 && gi.title && (!item.desc || !safeIncludes(item.desc, gi.title)))
  371.         c += gi.title + (item.desc ? ' - ' : '');
  372.       if (item.desc)
  373.         c += item.desc;
  374.       App.setBar(c.trim() || ' ', 'gallery', true);
  375.     } else if ('caption' in ai) {
  376.       App.setBar(ai.caption, 'caption');
  377.     } else if (ai.tooltip) {
  378.       App.setBar(ai.tooltip.text, 'tooltip');
  379.     } else {
  380.       App.setBar(' ', 'info');
  381.     }
  382.   }
  383.  
  384.   static updateMouse(e) {
  385.     const cx = ai.clientX = e.clientX;
  386.     const cy = ai.clientY = e.clientY;
  387.     const r = ai.rect;
  388.     if (r)
  389.       ai.isOverRect =
  390.         cx < r.right + 2 &&
  391.         cx > r.left - 2 &&
  392.         cy < r.bottom + 2 &&
  393.         cy > r.top - 2;
  394.   }
  395.  
  396.   static updateProgress() {
  397.     if (ai.preloadStart) {
  398.       const wait = ai.preloadStart + cfg.delay - Date.now();
  399.       if (wait > 0) {
  400.         ai.timer = setTimeout(App.checkProgress, wait);
  401.         return;
  402.       }
  403.     }
  404.     if (ai.urls && ai.urls.length && Math.max(ai.nheight, ai.nwidth) < 130) {
  405.       App.handleError({type: 'error'});
  406.       return;
  407.     }
  408.     App.setStatus(false);
  409.     Util.forceLayout(ai.popup);
  410.     ai.popup.className = `${PREFIX}show`;
  411.     App.updateSpacing();
  412.     App.updateScales();
  413.     App.updateTitle();
  414.     Popup.move();
  415.     if (!ai.bar)
  416.       App.updateFileInfo();
  417.     ai.large = ai.nwidth > ai.popup.clientWidth + ai.mbw ||
  418.                ai.nheight > ai.popup.clientHeight + ai.mbh;
  419.     if (ai.large)
  420.       App.setStatus('large');
  421.     if (cfg.imgtab && App.isImageTab || cfg.zoom === 'auto')
  422.       App.toggleZoom();
  423.   }
  424.  
  425.   static updateScales() {
  426.     const scales = cfg.scales.length ? cfg.scales : Config.DEFAULTS.scales.slice();
  427.     const fit = Math.min(
  428.       (ai.view.width - ai.mbw - ai.outline * 2) / ai.nwidth,
  429.       (ai.view.height - ai.mbh - ai.outline * 2) / ai.nheight);
  430.     let cutoff = ai.scale = Math.min(1, fit);
  431.     ai.scales = [];
  432.     for (let i = scales.length; i--;) {
  433.       const scale = scales[i];
  434.       const val = parseFloat(scale) || fit;
  435.       const option = typeof scale === 'string' && scale.slice(-1);
  436.       if (option === '!')
  437.         cutoff = val;
  438.       if (option === '*')
  439.         ai.zscale = val;
  440.       if (val !== ai.scale)
  441.         ai.scales.push(val);
  442.     }
  443.     ai.scales = ai.scales
  444.       .filter(x => x >= cutoff)
  445.       .sort((a, b) => a - b);
  446.     ai.scales.unshift(ai.scale);
  447.   }
  448.  
  449.   static updateSpacing() {
  450.     const s = getComputedStyle(ai.popup);
  451.     ai.outline =
  452.       (parseFloat(s['outline-offset']) || 0) +
  453.       (parseFloat(s['outline-width']) || 0);
  454.     ai.pw =
  455.       (parseFloat(s['padding-left']) || 0) +
  456.       (parseFloat(s['padding-right']) || 0);
  457.     ai.ph =
  458.       (parseFloat(s['padding-top']) || 0) +
  459.       (parseFloat(s['padding-bottom']) || 0);
  460.     ai.mbw =
  461.       (parseFloat(s['margin-left']) || 0) +
  462.       (parseFloat(s['margin-right']) || 0) +
  463.       (parseFloat(s['border-left-width']) || 0) +
  464.       (parseFloat(s['border-right-width']) || 0);
  465.     ai.mbh =
  466.       (parseFloat(s['margin-top']) || 0) +
  467.       (parseFloat(s['margin-bottom']) || 0) +
  468.       (parseFloat(s['border-top-width']) || 0) +
  469.       (parseFloat(s['border-bottom-width']) || 0);
  470.   }
  471.  
  472.   static updateStyles() {
  473.     Util.addStyle('global', /*language=CSS*/ App.globalStyle || (App.globalStyle = `
  474.       #${PREFIX}bar {
  475.         position: fixed;
  476.         z-index: 2147483647;
  477.         left: 0;
  478.         right: 0;
  479.         top: 0;
  480.         opacity: 0;
  481.         transition: opacity 1s ease .25s;
  482.         text-align: center;
  483.         font-family: sans-serif;
  484.         font-size: 15px;
  485.         font-weight: bold;
  486.         background: #0005;
  487.         color: white;
  488.         padding: 4px 10px;
  489.         text-shadow: .5px .5px 2px #000;
  490.       }
  491.       #${PREFIX}bar.${PREFIX}show {
  492.         opacity: 1;
  493.       }
  494.       #${PREFIX}bar[data-zoom]::after {
  495.         content: " (" attr(data-zoom) ")";
  496.         opacity: .8;
  497.       }
  498.       #${PREFIX}popup.${PREFIX}show {
  499.         display: inline;
  500.       }
  501.       #${PREFIX}popup {
  502.         display: none;
  503.         border: none;
  504.         box-sizing: content-box;
  505.         position: fixed;
  506.         z-index: 2147483647;
  507.         margin: 0;
  508.         max-width: none;
  509.         max-height: none;
  510.         will-change: display, width, height, left, top;
  511.         cursor: none;
  512.         animation: .2s ${PREFIX}fadein both;
  513.       }
  514.       #${PREFIX}popup.${PREFIX}show {
  515.         box-shadow: 6px 6px 30px transparent;
  516.         transition: box-shadow .25s, background-color .25s;
  517.       }
  518.       #${PREFIX}popup.${PREFIX}show[loaded] {
  519.         box-shadow: 6px 6px 30px black;
  520.         background-color: white;
  521.       }
  522.       #${PREFIX}popup.${PREFIX}zoom-max {
  523.         image-rendering: pixelated;
  524.       }
  525.       @keyframes ${PREFIX}fadein {
  526.         from { opacity: 0; }
  527.         to { opacity: 1; }
  528.       }
  529.       ${cfg.globalStatus ? `
  530.         .${PREFIX}loading:not(.${PREFIX}preloading) * {
  531.           cursor: wait !important;
  532.         }
  533.         .${PREFIX}edge #${PREFIX}popup {
  534.           cursor: default;
  535.         }
  536.         .${PREFIX}error * {
  537.           cursor: not-allowed !important;
  538.         }
  539.         .${PREFIX}ready *, .${PREFIX}large * {
  540.           cursor: zoom-in !important;
  541.         }
  542.         .${PREFIX}shift * {
  543.           cursor: default !important;
  544.         }
  545.       ` : `
  546.         [${STATUS_ATTR}~="loading"]:not([${STATUS_ATTR}~="preloading"]) {
  547.           cursor: wait !important;
  548.         }
  549.         #${PREFIX}popup[${STATUS_ATTR}~="edge"] {
  550.           cursor: default !important;
  551.         }
  552.         [${STATUS_ATTR}~="error"] {
  553.           cursor: not-allowed !important;
  554.         }
  555.         [${STATUS_ATTR}~="ready"],
  556.         [${STATUS_ATTR}~="large"] {
  557.           cursor: zoom-in !important;
  558.         }
  559.         [${STATUS_ATTR}~="shift"] {
  560.           cursor: default !important;
  561.         }
  562.       `}
  563.       ${cfg.css.includes('{') ? cfg.css : `#${PREFIX}popup {${cfg.css}}`}
  564.     `));
  565.     Util.addStyle('rule', ai.rule.css || '');
  566.   }
  567.  
  568.   static updateTitle() {
  569.     if (!ai.bar)
  570.       return;
  571.     const megapixels = Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100;
  572.     const zoom = `${Math.round(ai.scale * 100)}% - ${ai.nwidth} x ${ai.nheight} px - ${megapixels} MP`;
  573.     if (ai.bar.dataset.zoom !== zoom) {
  574.       ai.bar.dataset.zoom = zoom;
  575.       App.updateBar();
  576.     }
  577.   }
  578. }
  579.  
  580. class Config {
  581.   constructor({data: c = GM_getValue('cfg'), save}) {
  582.     if (typeof c === 'string')
  583.       c = tryCatch(JSON.parse, c);
  584.     if (typeof c !== 'object' || !c)
  585.       c = {};
  586.     const {DEFAULTS} = Config;
  587.     if (c.version !== DEFAULTS.version) {
  588.       if (typeof c.hosts === 'string')
  589.         c.hosts = c.hosts.split('\n')
  590.           .map(s => tryCatch(JSON.parse, s) || s)
  591.           .filter(Boolean);
  592.       if (c.close === true || c.close === false)
  593.         c.zoomOut = c.close ? 'auto' : 'stay';
  594.       for (const key in DEFAULTS)
  595.         if (typeof c[key] !== typeof DEFAULTS[key])
  596.           c[key] = DEFAULTS[key];
  597.       if (c.version === 3 && c.scales[0] === 0)
  598.         c.scales[0] = '0!';
  599.       for (const key in c)
  600.         if (!(key in DEFAULTS))
  601.           delete c[key];
  602.       c.version = DEFAULTS.version;
  603.       if (save)
  604.         GM_setValue('cfg', JSON.stringify(c));
  605.     }
  606.     if (cfg && (
  607.       cfg.css !== c.css ||
  608.       cfg.globalStatus !== c.globalStatus
  609.     )) {
  610.       App.globalStyle = '';
  611.     }
  612.     Object.assign(this, c);
  613.   }
  614. }
  615.  
  616. class Ruler {
  617. /*
  618.  'u' works only with URLs so it's ignored if 'html' is true
  619.    ||some.domain = matches some.domain, anything.some.domain, etc.
  620.    |foo = url or text must start with foo
  621.    ^ = separator like / or ? or : but not a letter/number, not %._-
  622.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  623.  'r' is checked only if 'u' matches first
  624. */
  625.   static init() {
  626.     const errors = new Map();
  627.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  628.     for (const rule of errors.keys())
  629.       App.handleError('Invalid custom host rule:', rule);
  630.  
  631.     // rules that disable previewing
  632.     const disablers = [
  633.       dotDomain.endsWith('.stackoverflow.com') && {
  634.         e: '.post-tag, .post-tag img',
  635.         s: '',
  636.       },
  637.       {
  638.         u: '||disqus.com/',
  639.         s: '',
  640.       },
  641.     ];
  642.  
  643.     // optimization: a rule is created only when on domain
  644.     const perDomain = [
  645.       hostname.includes('startpage') && {
  646.         r: /\boiu=(.+)/,
  647.         s: '$1',
  648.         follow: true,
  649.       },
  650.       dotDomain.endsWith('.4chan.org') && {
  651.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  652.         q: '.op .fileText a',
  653.         css: '#post-preview{display:none}',
  654.       },
  655.       hostname.includes('amazon.') && {
  656.         r: /.+?images\/I\/.+?\./,
  657.         s: m => {
  658.           const uh = doc.getElementById('universal-hover');
  659.           return uh ? '' : m[0] + 'jpg';
  660.         },
  661.         css: '#zoomWindow{display:none!important;}',
  662.       },
  663.       dotDomain.endsWith('.bing.com') && {
  664.         e: 'a[m*="murl"]',
  665.         r: /murl&quot;:&quot;(.+?)&quot;/,
  666.         s: '$1',
  667.         html: true,
  668.       },
  669.       dotDomain.endsWith('.deviantart.com') && {
  670.         e: '[data-super-full-img] *, img[src*="/th/"]',
  671.         s: (m, node) => {
  672.           let el = node.closest('[data-super-full-img]');
  673.           if (el)
  674.             return el.dataset.superFullImg;
  675.           el = node.dataset.embedId && node.nextElementSibling;
  676.           if (el && el.dataset.embedId)
  677.             return el.src;
  678.         },
  679.       },
  680.       dotDomain.endsWith('.deviantart.com') && {
  681.         e: '.dev-view-deviation img',
  682.         s: () => [
  683.           $('.dev-page-download').href,
  684.           $('.dev-content-full').src,
  685.         ].filter(Boolean),
  686.       },
  687.       dotDomain.endsWith('.deviantart.com') && {
  688.         u: ',strp/',
  689.         s: '/\\/v1\\/.*//',
  690.       },
  691.       dotDomain.endsWith('.dropbox.com') && {
  692.         r: /(.+?&size_mode)=\d+(.*)/,
  693.         s: '$1=5$2',
  694.       },
  695.       dotDomain.endsWith('.facebook.com') && {
  696.         e: 'a[href*="ref=hovercard"]',
  697.         s: (m, node) =>
  698.           'https://www.facebook.com/photo.php?fbid=' +
  699.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  700.         follow: true,
  701.       },
  702.       dotDomain.endsWith('.facebook.com') && {
  703.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  704.         s: (m, node) =>
  705.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  706.             decodeURIComponent(m[4]),
  707.         html: true,
  708.         follow: true,
  709.       },
  710.       dotDomain.endsWith('.flickr.com') &&
  711.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  712.         r: /flickr\.com\/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.         r: new RegExp([
  725.           /(avatars.+?&s=)\d+/,
  726.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  727.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  728.         ].map(rx => rx.source).join('|')),
  729.         s: m => `https://${
  730.           m[1] ? `${m[1]}460` :
  731.             m[2] ? `${m[2]}usercontent${m[3]}` :
  732.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  733.         }`,
  734.       },
  735.       isGoogleImages && {
  736.         e: 'a',
  737.         r: /imgres\?imgurl=([^&]+)/,
  738.         s: '$1',
  739.       },
  740.       dotDomain.endsWith('.instagram.com') && {
  741.         e: [
  742.           'a[href*="/p/"]',
  743.           'a[role="button"][data-reactid*="scontent-"]',
  744.           'article div',
  745.           'article div div img',
  746.         ],
  747.         s: (m, node, rule) => {
  748.           const {a, data} = rule._getData(node) || {};
  749.           rule.follow = !data;
  750.           return (
  751.             !a ? false :
  752.               !data ? a.href :
  753.                 data.video_url || data.display_url);
  754.         },
  755.         c: (html, doc, node, rule) =>
  756.           tryCatch(() => rule._getData(node).data.edge_media_to_caption.edges[0].node.text) || '',
  757.         follow: true,
  758.         _getData(node) {
  759.           const n = node.closest('a[href*="/p/"], article');
  760.           if (!n)
  761.             return;
  762.           const a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  763.           if (!a)
  764.             return;
  765.           try {
  766.             const shortcode = a.pathname.match(/\/p\/(\w+)/)[1];
  767.             return {
  768.               a,
  769.               data: unsafeWindow._sharedData.entry_data.ProfilePage[0]
  770.                 .graphql.user.edge_owner_to_timeline_media.edges
  771.                 .find(e => e.node.shortcode === shortcode)
  772.                 .node,
  773.             };
  774.           } catch (e) {
  775.             return {a};
  776.           }
  777.         },
  778.       },
  779.       dotDomain.endsWith('.reddit.com') && {
  780.         u: '||i.reddituploads.com/',
  781.       },
  782.       dotDomain.endsWith('.reddit.com') && {
  783.         r: /(preview\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  784.         s: 'https://i.$1',
  785.       },
  786.       dotDomain.endsWith('.tumblr.com') && {
  787.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  788.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  789.         follow: true,
  790.       },
  791.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  792.         e: 'a.media-item, a.js-media-image-link',
  793.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  794.         follow: true,
  795.       },
  796.       dotDomain.endsWith('.twitter.com') && {
  797.         e: '.grid-tweet > .media-overlay',
  798.         s: (m, node) => node.previousElementSibling.src,
  799.         follow: true,
  800.       },
  801.     ];
  802.  
  803.     const main = [
  804.       {
  805.         r: /[/?=](https?[^&]+)/,
  806.         s: '$1',
  807.         follow: true,
  808.       },
  809.       {
  810.         u: [
  811.           '||500px.com/photo/',
  812.           '||cl.ly/',
  813.           '||cweb-pix.com/',
  814.           '||ibb.co/',
  815.           '||imgcredit.xyz/image/',
  816.         ],
  817.         r: /\.\w+\/.+/,
  818.         q: 'meta[property="og:image"]',
  819.       },
  820.       {
  821.         u: 'attachment.php',
  822.         r: /attachment\.php.+attachmentid/,
  823.       },
  824.       {
  825.         u: '||abload.de/image',
  826.         q: '#image',
  827.       },
  828.       {
  829.         u: '||deviantart.com/art/',
  830.         s: (m, node) =>
  831.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  832.             '' :
  833.             m.input,
  834.         q: [
  835.           '#download-button[href*=".jpg"]',
  836.           '#download-button[href*=".jpeg"]',
  837.           '#download-button[href*=".gif"]',
  838.           '#download-button[href*=".png"]',
  839.           '#gmi-ResViewSizer_fullimg',
  840.           'img.dev-content-full',
  841.         ],
  842.       },
  843.       {
  844.         u: '||dropbox.com/s',
  845.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  846.         q: (text, doc) =>
  847.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  848.       },
  849.       {
  850.         r: /[./]ebay\.[^/]+\/itm\//,
  851.         q: text =>
  852.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  853.             .replace(/~~60_\d+/, '~~60_57'),
  854.       },
  855.       {
  856.         u: '||i.ebayimg.com/',
  857.         s: (m, node) =>
  858.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  859.             m.input.replace(/~~60_\d+/, '~~60_57'),
  860.       },
  861.       {
  862.         u: [
  863.           '||fastpic.ru/big',
  864.           '||fastpic.ru/thumb',
  865.         ],
  866.         r: /\/\/(?:i(\d+)\.)?([^/]+\/)(big|thumb|view)\/([^.]+?)\.(\w+)/,
  867.         s: (m, node, rule) => {
  868.           const a = node.closest('[href*="fastpic.ru"]');
  869.           const am = a && rule.r.exec(decodeURIComponent(a.href)) || [];
  870.           const p = a && am[4].split('/');
  871.           return `https://i${am[1] || m[1] || am[3] === 'view' && p[0]}.${m[2]}big/${
  872.             am[3] === 'big' ? am[4] : m[4]}.${am[5] || m[5]}?noht=1`;
  873.         },
  874.         xhr: () => 'https://fastpic.ru',
  875.       },
  876.       {
  877.         u: '||fastpic.ru/view/',
  878.         q: 'img[src*="/big/"]',
  879.         xhr: true,
  880.       },
  881.       {
  882.         u: '||facebook.com/',
  883.         r: /photo\.php|[^/]+\/photos\//,
  884.         s: (m, node) =>
  885.           node.id === 'fbPhotoImage' ? false :
  886.             /gradient\.png$/.test(m.input) ? '' :
  887.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  888.         q: [
  889.           'div + span > a:first-child:not([href*="tag_faces"])',
  890.           'div + span > a[href*="tag_faces"] ~ a',
  891.         ],
  892.         rect: '#fbProfileCover',
  893.       },
  894.       {
  895.         u: '||fbcdn.',
  896.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  897.         s: m =>
  898.           dotDomain.endsWith('.facebook.com') &&
  899.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  900.           false,
  901.         manual: true,
  902.       },
  903.       {
  904.         u: ['||fbcdn-', 'fbcdn.net/'],
  905.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  906.         s: (m, node) => {
  907.           if (node.id === 'fbPhotoImage') {
  908.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  909.             if (a)
  910.               return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  911.           }
  912.           if (m[4])
  913.             return false;
  914.           if (node.parentNode.outerHTML.includes('/hovercard/'))
  915.             return '';
  916.           const gp = node.parentNode.parentNode;
  917.           if (node.outerHTML.includes('profile') && gp.href.includes('/photo'))
  918.             return false;
  919.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  920.         },
  921.         rect: '.photoWrap',
  922.       },
  923.       {
  924.         u: '||flickr.com/photos/',
  925.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  926.         s: m =>
  927.           m.input.indexOf('/sizes/') < 0 ?
  928.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  929.             false,
  930.         q: (text, doc) => {
  931.           const links = $$('.sizes-list a', doc);
  932.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  933.         },
  934.         follow: true,
  935.       },
  936.       {
  937.         u: '||flickr.com/photos/',
  938.         r: /\/sizes\//,
  939.         q: '#allsizes-photo > img',
  940.       },
  941.       {
  942.         u: '||gfycat.com/',
  943.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  944.         s: 'https://$1$3',
  945.         q: [
  946.           'meta[content$=".webm"]',
  947.           '#webmsource',
  948.           'source[src$=".webm"]',
  949.         ],
  950.       },
  951.       {
  952.         u: [
  953.           '||googleusercontent.com/proxy',
  954.           '||googleusercontent.com/gadgets/proxy',
  955.         ],
  956.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  957.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  958.       },
  959.       {
  960.         u: [
  961.           '||googleusercontent.com/',
  962.           '||ggpht.com/',
  963.         ],
  964.         s: (m, node) =>
  965.           m.input.includes('webcache.') ||
  966.           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/) ||
  967.           node.matches('.g-hovercard *, a[href*="profile_redirector"] > img') ?
  968.             '' :
  969.             m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  970.               .replace(/=[-\w]*\d+([&#].*|$)/, ''),
  971.       },
  972.       {
  973.         u: '||gravatar.com/',
  974.         r: /([a-z0-9]{32})/,
  975.         s: 'https://gravatar.com/avatar/$1?s=200',
  976.       },
  977.       {
  978.         u: '//gyazo.com/',
  979.         r: /\.com\/\w{32,}/,
  980.         q: 'meta[name="twitter:image"]',
  981.         xhr: true,
  982.       },
  983.       {
  984.         u: '||hostingkartinok.com/show-image.php',
  985.         q: '.image img',
  986.       },
  987.       {
  988.         u: [
  989.           '||imagecurl.com/images/',
  990.           '||imagecurl.com/viewer.php',
  991.         ],
  992.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  993.         s: 'https://imagecurl.com/images/$1$2$3',
  994.       },
  995.       {
  996.         u: '||imagebam.com/image/',
  997.         q: 'meta[property="og:image"]',
  998.         tabfix: true,
  999.         xhr: hostname.includes('planetsuzy'),
  1000.       },
  1001.       {
  1002.         u: '||imageban.ru/thumbs',
  1003.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1004.         s: '$1out$2/$3/$4',
  1005.       },
  1006.       {
  1007.         u: [
  1008.           '||imageban.ru/show',
  1009.           '||imageban.net/show',
  1010.           '||ibn.im/',
  1011.         ],
  1012.         q: '#img_main',
  1013.       },
  1014.       {
  1015.         u: '||imageshack.us/img',
  1016.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1017.         s: 'https://$2/download/$1/$3$4',
  1018.       },
  1019.       {
  1020.         u: '||imageshack.us/i/',
  1021.         q: '#share-dl',
  1022.       },
  1023.       {
  1024.         u: '||imageteam.org/img',
  1025.         q: 'img[alt="image"]',
  1026.       },
  1027.       {
  1028.         u: [
  1029.           '||imagetwist.com/',
  1030.           '||imageshimage.com/',
  1031.         ],
  1032.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1033.         q: 'img.pic',
  1034.         xhr: true,
  1035.       },
  1036.       {
  1037.         u: '||imageupper.com/i/',
  1038.         q: '#img',
  1039.         xhr: true,
  1040.       },
  1041.       {
  1042.         u: '||imagevenue.com/img.php',
  1043.         q: '#thepic',
  1044.       },
  1045.       {
  1046.         u: '||imagezilla.net/show/',
  1047.         q: '#photo',
  1048.         xhr: true,
  1049.       },
  1050.       {
  1051.         u: [
  1052.           '||images-na.ssl-images-amazon.com/images/',
  1053.           '||media-imdb.com/images/',
  1054.         ],
  1055.         r: /images\/.+?\.jpg/,
  1056.         s: '/V1\\.?_.+?\\.//g',
  1057.       },
  1058.       {
  1059.         u: '||imgbox.com/',
  1060.         r: /\.com\/([a-z0-9]+)$/i,
  1061.         q: '#img',
  1062.         xhr: hostname !== 'imgbox.com',
  1063.       },
  1064.       {
  1065.         u: '||imgclick.net/',
  1066.         r: /\.net\/(\w+)/,
  1067.         q: 'img.pic',
  1068.         xhr: true,
  1069.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1070.       },
  1071.       {
  1072.         u: [
  1073.           '||imgflip.com/i/',
  1074.           '||imgflip.com/gif/',
  1075.         ],
  1076.         r: /\/(i|gif)\/([^/?#]+)/,
  1077.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1078.       },
  1079.       {
  1080.         u: [
  1081.           '||imgur.com/a/',
  1082.           '||imgur.com/gallery/',
  1083.           '||imgur.com/t/',
  1084.         ],
  1085.         g: async (text, doc, url, m, rule, cb) => {
  1086.           // simplified extraction of JSON as it occupies only one line
  1087.           if (!/(?:mergeConfig\('gallery',\s*|Imgur\.Album\.getInstance\()[\s\S]*?[,\s{"'](?:image|album)\s*:\s*({[^\r\n]+?}),?[\r\n]/.test(text))
  1088.             return;
  1089.           const info = JSON.parse(RegExp.$1);
  1090.           let images = info.is_album ? info.album_images.images : [info];
  1091.           if (info.num_images > images.length) {
  1092.             const url = `https://imgur.com/ajaxalbums/getimages/${info.hash}/hit.json?all=true`;
  1093.             images = JSON.parse((await Remoting.gmXhr(url)).responseText).data.images;
  1094.           }
  1095.           const items = [];
  1096.           for (const img of images || []) {
  1097.             const u = `https://i.imgur.com/${img.hash}`;
  1098.             items.push({
  1099.               url: img.ext === '.gif' && img.animated !== false ?
  1100.                 [`${u}.webm`, `${u}.mp4`, u] :
  1101.                 u + img.ext,
  1102.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1103.             });
  1104.           }
  1105.           if (images && info.is_album && !safeIncludes(items[0].desc, info.title))
  1106.             items.title = info.title;
  1107.           cb(items);
  1108.         },
  1109.         css: '.post > .hover { display:none!important; }',
  1110.       },
  1111.       {
  1112.         u: '||imgur.com/',
  1113.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1114.         s: 'gallery',
  1115.         g: (text, doc, url, m) =>
  1116.           m[2].split(',').map(id => ({
  1117.             url: `https://i.${m[1]}${id}.jpg`,
  1118.           })),
  1119.       },
  1120.       {
  1121.         u: '||imgur.com/',
  1122.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.([a-z]+))/i,
  1123.         s: (m, node) => {
  1124.           if (/memegen|random|register|search|signin/.test(m.input))
  1125.             return '';
  1126.           const a = node.closest('a');
  1127.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1128.             return false;
  1129.           const id = m[3].replace(/(.{7})[bhm]$/, '$1');
  1130.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1131.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1132.           return ext === 'webm' ?
  1133.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1134.             u + ext;
  1135.         },
  1136.       },
  1137.       {
  1138.         u: [
  1139.           '||instagr.am/p/',
  1140.           '||instagram.com/p/',
  1141.         ],
  1142.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1143.         q: text => {
  1144.           const m = JSON.parse(text).graphql.shortcode_media;
  1145.           return m.video_url || m.display_url;
  1146.         },
  1147.         rect: 'div.PhotoGridMediaItem',
  1148.         c: text => {
  1149.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1150.           return m === undefined ? '(no caption)' : m.node.text;
  1151.         },
  1152.       },
  1153.       {
  1154.         u: [
  1155.           '||livememe.com/',
  1156.           '||lvme.me/',
  1157.         ],
  1158.         r: /\.\w+\/([^.]+)$/,
  1159.         s: 'http://i.lvme.me/$1.jpg',
  1160.       },
  1161.       {
  1162.         u: '||lostpic.net/image',
  1163.         q: '.image-viewer-image img',
  1164.       },
  1165.       {
  1166.         u: '||makeameme.org/meme/',
  1167.         r: /\/meme\/([^/?#]+)/,
  1168.         s: 'https://media.makeameme.org/created/$1.jpg',
  1169.       },
  1170.       {
  1171.         u: '||photobucket.com/',
  1172.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1173.         s: 'https://i$1$3',
  1174.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1175.       },
  1176.       {
  1177.         u: '||piccy.info/view3/',
  1178.         r: /(.+?\/view3)\/(.*)\//,
  1179.         s: '$1/$2/orig/',
  1180.         q: '#mainim',
  1181.       },
  1182.       {
  1183.         u: '||pimpandhost.com/image/',
  1184.         r: /(.+?\/image\/[0-9]+)/,
  1185.         s: '$1?size=original',
  1186.         q: 'img.original',
  1187.       },
  1188.       {
  1189.         u: [
  1190.           '||pixroute.com/',
  1191.           '||imgspice.com/',
  1192.         ],
  1193.         r: /\.html$/,
  1194.         q: 'img[id]',
  1195.         xhr: true,
  1196.       },
  1197.       {
  1198.         u: '||postima',
  1199.         r: /postima?ge?\.org\/image\/\w+/,
  1200.         q: [
  1201.           'a[href*="dl="]',
  1202.           '#main-image',
  1203.         ],
  1204.       },
  1205.       {
  1206.         u: [
  1207.           '||prntscr.com/',
  1208.           '||prnt.sc/',
  1209.         ],
  1210.         r: /\.\w+\/.+/,
  1211.         q: 'meta[property="og:image"]',
  1212.         xhr: true,
  1213.       },
  1214.       {
  1215.         u: '||radikal.ru/',
  1216.         r: /\.ru\/(fp|.+\.html)/,
  1217.         q: text => text.match(/http:\/\/[a-z0-9]+\.radikal\.ru[a-z0-9/]+\.(jpg|gif|png)/i)[0],
  1218.       },
  1219.       {
  1220.         u: '||tumblr.com',
  1221.         r: /_500\.jpg/,
  1222.         s: ['/_500/_1280/', ''],
  1223.       },
  1224.       {
  1225.         u: '||twimg.com/',
  1226.         r: /\/profile_images/i,
  1227.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1228.       },
  1229.       {
  1230.         u: '||twimg.com/media/',
  1231.         r: /.+?format=(jpe?g|png|gif)/i,
  1232.         s: '$0&name=large',
  1233.       },
  1234.       {
  1235.         u: '||twimg.com/1/proxy',
  1236.         r: /t=([^&_]+)/i,
  1237.         s: m => atob(m[1]).match(/http.+/),
  1238.       },
  1239.       {
  1240.         u: '||pic.twitter.com/',
  1241.         r: /\.com\/[a-z0-9]+/i,
  1242.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1243.         follow: true,
  1244.       },
  1245.       {
  1246.         u: '||twitpic.com/',
  1247.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1248.         s: 'https://twitpic.com/show/large/$2',
  1249.       },
  1250.       {
  1251.         u: '||upix.me/files',
  1252.         s: '/#//',
  1253.       },
  1254.       {
  1255.         u: '||wiki',
  1256.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1257.         s: '/\\/thumb(?=\\/)|' +
  1258.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1259.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1260.         xhr: !hostname.includes('wiki'),
  1261.       },
  1262.       {
  1263.         u: '||ytimg.com/vi/',
  1264.         r: /(.+?\/vi\/[^/]+)/,
  1265.         s: '$1/0.jpg',
  1266.         rect: '.video-list-item',
  1267.       },
  1268.       {
  1269.         u: '/viewer.php?file=',
  1270.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1271.         s: '$1/images/$2',
  1272.         xhr: true,
  1273.       },
  1274.       {
  1275.         u: '/thumb_',
  1276.         r: /\/albums.+\/thumb_[^/]/,
  1277.         s: '/thumb_//',
  1278.       },
  1279.       {
  1280.         u: [
  1281.           '.th.jp',
  1282.           '.th.gif',
  1283.           '.th.png',
  1284.         ],
  1285.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1286.         s: '$1$2',
  1287.         follow: true,
  1288.       },
  1289.       {
  1290.         u: [
  1291.           '.jp',
  1292.           '.gif',
  1293.           '.png',
  1294.           '.svg',
  1295.           '.webm',
  1296.         ],
  1297.         r: /[^?:]+\.(jpe?g?|gif|png|svg|webm)($|\?)/i,
  1298.       },
  1299.     ];
  1300.  
  1301.     /** @type mpiv.HostRule[] */
  1302.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1303.   }
  1304.  
  1305.   static format(rule, {expand} = {}) {
  1306.     const s = JSON.stringify(rule, null, ' ');
  1307.     return expand ?
  1308.       /* {"a": ...,
  1309.           "b": ...,
  1310.           "c": ...
  1311.          } */
  1312.       s.replace(/^{\s+/g, '{') :
  1313.       /* {"a": ..., "b": ..., "c": ...} */
  1314.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1315.   }
  1316.  
  1317.   /** @returns mpiv.HostRule | Error | false | undefined */
  1318.   static parse(rule) {
  1319.     const isBatchOp = this instanceof Map;
  1320.     try {
  1321.       if (typeof rule === 'string')
  1322.         rule = JSON.parse(rule);
  1323.       if ('d' in rule && typeof rule.d !== 'string')
  1324.         rule.d = undefined;
  1325.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1326.         return false;
  1327.       const compileTo = isBatchOp ? rule : {};
  1328.       if (rule.r)
  1329.         compileTo.r = new RegExp(rule.r, 'i');
  1330.       if (RX_HAS_CODE.test(rule.s))
  1331.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1332.       if (RX_HAS_CODE.test(rule.q))
  1333.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1334.       if (RX_HAS_CODE.test(rule.c))
  1335.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1336.       return rule;
  1337.     } catch (e) {
  1338.       if (!e.message.includes('unsafe-eval'))
  1339.         if (isBatchOp) {
  1340.           this.set(rule, e);
  1341.         } else {
  1342.           return e;
  1343.         }
  1344.     }
  1345.   }
  1346.  
  1347.   static runQ(text, doc, docUrl) {
  1348.     let url;
  1349.     if (typeof ai.rule.q === 'function') {
  1350.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1351.       if (Array.isArray(url)) {
  1352.         ai.urls = url.slice(1);
  1353.         url = url[0];
  1354.       }
  1355.     } else {
  1356.       const el = $many(ai.rule.q, doc);
  1357.       url = el && Remoting.findFileUrl(el, docUrl);
  1358.     }
  1359.     return url;
  1360.   }
  1361.  
  1362.   static runS(node, rule, m) {
  1363.     let urls = [];
  1364.     for (const s of ensureArray(rule.s))
  1365.       urls.push(
  1366.         typeof s === 'string' ? Util.maybeDecodeURL(Ruler.substituteSingle(s, m)) :
  1367.           typeof s === 'function' ? s(m, node, rule) :
  1368.             s);
  1369.     if (rule.q && urls.length > 1) {
  1370.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1371.       return {skipRule: true};
  1372.     }
  1373.     if (Array.isArray(urls[0]))
  1374.       urls = urls[0];
  1375.     // `false` returned by "s" property means "skip this rule"
  1376.     // any other falsy value (like say "") means "stop all rules"
  1377.     return urls[0] === false ? {skipRule: true} : urls.map(Util.maybeDecodeURL);
  1378.   }
  1379.  
  1380.   static substituteSingle(s, m) {
  1381.     if (!m)
  1382.       return s;
  1383.     if (s.startsWith('/') && !s.startsWith('//')) {
  1384.       const mid = s.search(/[^\\]\//) + 1;
  1385.       const end = s.lastIndexOf('/');
  1386.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1387.       return m.input.replace(re, s.slice(mid + 1, end));
  1388.     }
  1389.     if (m.length && s.includes('$')) {
  1390.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  1391.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  1392.         for (let i = maxLength; i >= 0; i--) {
  1393.           const part = num.slice(0, i) | 0;
  1394.           if (part < m.length)
  1395.             return (m[part] || '') + num.slice(i);
  1396.         }
  1397.         return text;
  1398.       });
  1399.     }
  1400.     return s;
  1401.   }
  1402. }
  1403.  
  1404. const SimpleUrlMatcher = (() => {
  1405.   // string-to-regexp escaped chars
  1406.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  1407.   // rx for '^' symbol in simple url match
  1408.   const RX_SEP = /[^\w%._-]/g;
  1409.   const RXS_SEP = RX_SEP.source;
  1410.  
  1411.   function checkArray(s) {
  1412.     return this.some(checkArrayItem, s);
  1413.   }
  1414.  
  1415.   function checkArrayItem(item) {
  1416.     return item.fn.call(item.this, this);
  1417.   }
  1418.  
  1419.   function equals(s) {
  1420.     return s.startsWith(this) && (
  1421.       s.length === this.length ||
  1422.       s.length === this.length + 1 && endsWithSep(s));
  1423.   }
  1424.  
  1425.   function starts(s) {
  1426.     return s.startsWith(this);
  1427.   }
  1428.  
  1429.   function ends(s) {
  1430.     return s.endsWith(this) || (
  1431.       s.length > this.length &&
  1432.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  1433.       endsWithSep(s));
  1434.   }
  1435.  
  1436.   function has(s) {
  1437.     return s.includes(this);
  1438.   }
  1439.  
  1440.   function regexp(s) {
  1441.     return s.includes(this[0]) && this[1].test(s);
  1442.   }
  1443.  
  1444.   function endsWithSep(s) {
  1445.     RX_SEP.lastIndex = s.length - 1;
  1446.     return RX_SEP.test(s);
  1447.   }
  1448.  
  1449.   function startsDomainPrescreen(url) {
  1450.     return url.includes(this[0]) &&
  1451.            startsDomain.call(this, url);
  1452.   }
  1453.  
  1454.   function startsDomain(url) {
  1455.     const [p, gap, host] = url.split('/', 3);
  1456.     if (gap || p && !p.endsWith(':'))
  1457.       return;
  1458.     const [needle, domain, pinDomainEnd, endSep] = this;
  1459.     let start = pinDomainEnd ? host.length - domain.length : 0;
  1460.     for (; ; start++) {
  1461.       start = host.indexOf(domain, start);
  1462.       if (start < 0)
  1463.         return;
  1464.       if (!start || host[start - 1] === '.')
  1465.         break;
  1466.     }
  1467.     start += p.length + 2;
  1468.     return url.lastIndexOf(needle, start) === start &&
  1469.            (!endSep || start + needle.length === url.length);
  1470.   }
  1471.  
  1472.   function findLongestPart(s) {
  1473.     const len = s.length;
  1474.     let maxLen = 0;
  1475.     let start;
  1476.     for (let i = 0, j; i < len; i = j + 1) {
  1477.       j = s.indexOf('^', i);
  1478.       if (j < 0)
  1479.         j = len;
  1480.       if (j - i > maxLen) {
  1481.         maxLen = j - i;
  1482.         start = i;
  1483.       }
  1484.     }
  1485.     return maxLen < len ? s.substr(start, maxLen) : s;
  1486.   }
  1487.  
  1488.   return {
  1489.     compile(match) {
  1490.       const results = [];
  1491.       for (const s of ensureArray(match)) {
  1492.         const pinDomain = s.startsWith('||');
  1493.         const pinStart = !pinDomain && s.startsWith('|');
  1494.         const endSep = s.endsWith('^');
  1495.         let fn;
  1496.         let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  1497.         if (needle.includes('^')) {
  1498.           const plain = findLongestPart(needle);
  1499.           const rx = new RegExp(
  1500.             (pinStart ? '^' : '') +
  1501.             (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  1502.             needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  1503.             (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  1504.           needle = [plain, rx];
  1505.           fn = regexp;
  1506.         } else if (pinStart) {
  1507.           fn = endSep ? equals : starts;
  1508.         } else if (pinDomain) {
  1509.           const slashPos = needle.indexOf('/');
  1510.           const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  1511.           needle = [needle, domain, slashPos > 0, endSep];
  1512.           fn = startsDomainPrescreen;
  1513.         } else if (endSep) {
  1514.           fn = ends;
  1515.         } else {
  1516.           fn = has;
  1517.         }
  1518.         results.push({fn, this: needle});
  1519.       }
  1520.       return results.length > 1 ?
  1521.         {fn: checkArray, this: results} :
  1522.         results[0];
  1523.     },
  1524.   };
  1525. })();
  1526.  
  1527. class RuleMatcher {
  1528.  
  1529.   /** @returns ?mpiv.RuleMatchInfo */
  1530.   static findForLink(a) {
  1531.     let url =
  1532.       a.getAttribute('data-expanded-url') ||
  1533.       a.getAttribute('data-full-url') ||
  1534.       a.getAttribute('data-url') ||
  1535.       a.href;
  1536.     if (url.startsWith('data:'))
  1537.       url = false;
  1538.     else if (url.includes('//t.co/'))
  1539.       url = 'http://' + a.textContent;
  1540.     return RuleMatcher.find(url, a);
  1541.   }
  1542.  
  1543.   /** @returns ?mpiv.RuleMatchInfo */
  1544.   static find(url, node, {noHtml, skipRule} = {}) {
  1545.     const tn = node.tagName;
  1546.     let m, html, urls;
  1547.     for (const rule of Ruler.rules) {
  1548.       if (rule.e && !node.matches(rule.e) || rule === skipRule)
  1549.         continue;
  1550.       if (rule.html && rule.r && !noHtml && (tn === 'A' || tn === 'IMG' || rule.e))
  1551.         m = rule.r.exec(html || (html = node.outerHTML));
  1552.       else if (url)
  1553.         m = (rule.r || rule.u) ?
  1554.           RuleMatcher.makeUrlMatch(url, node, rule) :
  1555.           RuleMatcher.makeDummyMatch(url);
  1556.       if (!m ||
  1557.           // a rule with follow:true for the currently hovered IMG produced a URL,
  1558.           // but we'll only allow it to match rules without 's' in the nested find call
  1559.           tn === 'IMG' && !('s' in rule) && !skipRule)
  1560.         continue;
  1561.       if (rule.s === '')
  1562.         return {};
  1563.       const hasS = 's' in rule && rule.s !== 'gallery';
  1564.       urls = hasS ?
  1565.         Ruler.runS(node, rule, m) :
  1566.         [m.input];
  1567.       if (!urls.skipRule) {
  1568.         const url = urls[0];
  1569.         return !url ? {} :
  1570.           hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule) ?
  1571.             RuleMatcher.find(url, node, {skipRule: rule}) :
  1572.             RuleMatcher.makeInfo(urls, node, rule, m);
  1573.       }
  1574.     }
  1575.   }
  1576.  
  1577.   static makeUrlMatch(url, node, rule) {
  1578.     let {r, u} = rule;
  1579.     let m;
  1580.     if (u) {
  1581.       u = rule._u || (rule._u = SimpleUrlMatcher.compile(u));
  1582.       m = u.fn.call(u.this, url) && (r || RuleMatcher.makeDummyMatch(url));
  1583.     }
  1584.     return (m || !u) && r ? r.exec(url) : m;
  1585.   }
  1586.  
  1587.   static makeDummyMatch(url) {
  1588.     const m = [url];
  1589.     m.index = 0;
  1590.     m.input = url;
  1591.     return m;
  1592.   }
  1593.  
  1594.   /** @returns mpiv.RuleMatchInfo */
  1595.   static makeInfo(urls, node, rule, m) {
  1596.     const url = urls[0];
  1597.     const info = {
  1598.       node,
  1599.       rule,
  1600.       url,
  1601.       urls: urls.length > 1 ? urls.slice(1) : null,
  1602.       match: m,
  1603.       gallery: rule.g && Gallery.makeParser(rule.g),
  1604.       post: typeof rule.post === 'function' ? rule.post(m) : rule.post,
  1605.       xhr: cfg.xhr && rule.xhr,
  1606.     };
  1607.     Util.lazyGetRect(info, node, rule.rect);
  1608.     if (
  1609.       dotDomain.endsWith('.twitter.com') && !/(facebook|google|twimg|twitter)\.com\//.test(url) ||
  1610.       dotDomain.endsWith('.github.com') && !/github/.test(url) ||
  1611.       dotDomain.endsWith('.facebook.com') && /\bimgur\.com/.test(url)
  1612.     ) {
  1613.       info.xhr = 'data';
  1614.     }
  1615.     return info;
  1616.   }
  1617.  
  1618.   static isFollowableUrl(url, rule) {
  1619.     const f = rule.follow;
  1620.     return typeof f === 'function' ? f(url) : f;
  1621.   }
  1622. }
  1623.  
  1624. class Events {
  1625.  
  1626.   static drop(e) {
  1627.     e.preventDefault();
  1628.     e.stopPropagation();
  1629.   }
  1630.  
  1631.   static onMouseOver(e) {
  1632.     if (!App.enabled || e.shiftKey || ai.zoom)
  1633.       return;
  1634.     let node = e.target;
  1635.     if (node === ai.popup ||
  1636.         node === doc.body ||
  1637.         node === doc.documentElement)
  1638.       return;
  1639.  
  1640.     if (node.shadowRoot)
  1641.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  1642.  
  1643.     if (!Ruler.rules)
  1644.       Ruler.init();
  1645.  
  1646.     let a, img, url, info;
  1647.     if (node.tagName === 'A') {
  1648.       a = node;
  1649.     } else {
  1650.       if (node.tagName === 'IMG') {
  1651.         img = node;
  1652.         if (!img.src.startsWith('data:'))
  1653.           url = Util.rel2abs(img.src, location.href);
  1654.       }
  1655.       info = RuleMatcher.find(url, node);
  1656.       if (!info)
  1657.         a = node.closest('a');
  1658.     }
  1659.  
  1660.     if (!info && a)
  1661.       info = RuleMatcher.findForLink(a);
  1662.  
  1663.     if (!info && img) {
  1664.       info = Util.lazyGetRect({
  1665.         url: img.src,
  1666.         node: img,
  1667.         rule: {},
  1668.       }, img);
  1669.     }
  1670.  
  1671.     if (info && info.url && info.node !== ai.node)
  1672.       App.activate(info, e);
  1673.   }
  1674.  
  1675.   static pierceShadow(node, x, y) {
  1676.     for (let root; (root = node.shadowRoot);) {
  1677.       root.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  1678.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1679.       const inner = root.elementFromPoint(x, y);
  1680.       if (!inner || inner === node)
  1681.         break;
  1682.       node = inner;
  1683.     }
  1684.     return node;
  1685.   }
  1686.  
  1687.   static onMouseOut(e) {
  1688.     if (!e.relatedTarget && !e.shiftKey)
  1689.       App.deactivate();
  1690.   }
  1691.  
  1692.   static onMouseOutShadow(e) {
  1693.     const root = e.target.shadowRoot;
  1694.     if (root) {
  1695.       root.removeEventListener('mouseover', Events.onMouseOver);
  1696.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  1697.     }
  1698.   }
  1699.  
  1700.   static onMouseMove(e) {
  1701.     App.updateMouse(e);
  1702.     if (e.shiftKey) {
  1703.       ai.lazyUnload = true;
  1704.       return;
  1705.     }
  1706.     if (!ai.zoomed && !ai.isOverRect) {
  1707.       App.deactivate();
  1708.       return;
  1709.     }
  1710.     if (ai.zoom) {
  1711.       Popup.move();
  1712.       const {height: h, width: w} = ai.view;
  1713.       const {clientX: cx, clientY: cy} = ai;
  1714.       const bx = w / 6;
  1715.       const by = h / 6;
  1716.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  1717.       App.setStatus(`${onEdge ? '+' : '-'}edge`);
  1718.     }
  1719.   }
  1720.  
  1721.   static onMouseDown({shiftKey, button}) {
  1722.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  1723.       ai.controlled = ai.zoomed = true;
  1724.     } else if (button === 2 || shiftKey) {
  1725.       // we ignore RMB and Shift
  1726.     } else {
  1727.       App.deactivate({wait: true});
  1728.     }
  1729.   }
  1730.  
  1731.   static onMouseScroll(e) {
  1732.     const dir = (e.deltaY || -e.wheelDelta) > 0 ? 1 : -1;
  1733.     if (ai.zoom) {
  1734.       Events.drop(e);
  1735.       const i = ai.scales.indexOf(ai.scale) - dir;
  1736.       const n = ai.scales.length;
  1737.       if (i >= 0 && i < n)
  1738.         ai.scale = ai.scales[i];
  1739.       if (i === 0 && cfg.zoomOut !== 'stay') {
  1740.         if ((cfg.zoomOut === 'close' || !ai.isOverRect) &&
  1741.             (!ai.gItems || ai.gItems.length < 2)) {
  1742.           App.deactivate({wait: true});
  1743.           return;
  1744.         }
  1745.         ai.zoom = false;
  1746.         ai.zoomed = false;
  1747.         App.updateFileInfo();
  1748.       } else {
  1749.         ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1750.       }
  1751.       if (ai.zooming)
  1752.         ai.popup.classList.add(`${PREFIX}zooming`);
  1753.       Popup.move();
  1754.       App.updateTitle();
  1755.     } else if (ai.gItems && ai.gItems.length > 1 && ai.popup) {
  1756.       Events.drop(e);
  1757.       Gallery.next(dir);
  1758.     } else if (cfg.zoom === 'wheel' && dir < 0 && ai.popup) {
  1759.       Events.drop(e);
  1760.       App.toggleZoom();
  1761.     } else {
  1762.       App.deactivate();
  1763.     }
  1764.   }
  1765.  
  1766.   static onKeyDown(e) {
  1767.     switch (e.key) {
  1768.       case 'Shift':
  1769.         App.setStatus('+shift');
  1770.         if (ai.popup && 'controls' in ai.popup)
  1771.           ai.popup.controls = true;
  1772.         break;
  1773.       case 'Control':
  1774.         if (!ai.popup && (cfg.start !== 'auto' || ai.rule.manual))
  1775.           Popup.start();
  1776.         break;
  1777.     }
  1778.   }
  1779.  
  1780.   static onKeyUp(e) {
  1781.     switch (e.key.length > 1 ? e.key : e.code) {
  1782.       case 'Shift':
  1783.         App.setStatus('-shift');
  1784.         if ((ai.popup || {}).controls)
  1785.           ai.popup.controls = false;
  1786.         if (ai.controlled) {
  1787.           ai.controlled = false;
  1788.           return;
  1789.         }
  1790.         ai.popup && (ai.zoomed || ai.isOverRect !== false) ?
  1791.           App.toggleZoom() :
  1792.           App.deactivate({wait: true});
  1793.         break;
  1794.       case 'Control':
  1795.         break;
  1796.       case 'Escape':
  1797.         App.deactivate({wait: true});
  1798.         break;
  1799.       case 'ArrowRight':
  1800.       case 'KeyJ':
  1801.         Events.drop(e);
  1802.         Gallery.next(1);
  1803.         break;
  1804.       case 'ArrowLeft':
  1805.       case 'KeyK':
  1806.         Events.drop(e);
  1807.         Gallery.next(-1);
  1808.         break;
  1809.       case 'KeyD': {
  1810.         Events.drop(e);
  1811.         Remoting.saveFile();
  1812.         break;
  1813.       }
  1814.       case 'KeyT':
  1815.         ai.lazyUnload = true;
  1816.         GM_openInTab(
  1817.           ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  1818.           navigator.userAgent.includes('Gecko/') ?
  1819.             Util.tabFixUrl() :
  1820.             ai.popup.src);
  1821.         App.deactivate();
  1822.         break;
  1823.       default:
  1824.         App.deactivate({wait: true});
  1825.     }
  1826.   }
  1827.  
  1828.   static onContext(e) {
  1829.     if (e.shiftKey)
  1830.       return;
  1831.     if (cfg.zoom === 'context' && ai.popup && App.toggleZoom()) {
  1832.       Events.drop(e);
  1833.       return;
  1834.     }
  1835.     if (!ai.popup && (
  1836.       cfg.start === 'context' ||
  1837.       (cfg.start === 'auto' && ai.rule.manual)
  1838.     )) {
  1839.       Popup.start();
  1840.       Events.drop(e);
  1841.     } else {
  1842.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1843.     }
  1844.   }
  1845. }
  1846.  
  1847. class Popup {
  1848.  
  1849.   static schedule(force) {
  1850.     if (!cfg.preload) {
  1851.       ai.timer = setTimeout(Popup.start, cfg.delay);
  1852.     } else if (!force) {
  1853.       // we don't want to preload everything in the path of a quickly moving mouse cursor
  1854.       ai.timer = setTimeout(Popup.start, SETTLE_TIME, force);
  1855.       ai.preloadStart = Date.now();
  1856.     } else {
  1857.       App.setStatus('+preloading');
  1858.       setTimeout(App.setStatus, cfg.delay, '-preloading');
  1859.     }
  1860.   }
  1861.  
  1862.   static start() {
  1863.     App.updateStyles();
  1864.     ai.gallery ?
  1865.       Popup.startGallery() :
  1866.       Popup.startSingle();
  1867.   }
  1868.  
  1869.   static startSingle() {
  1870.     App.setStatusLoading();
  1871.     ai.imageUrl = null;
  1872.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  1873.       Remoting.findRedirect();
  1874.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  1875.       Popup.startFromQ();
  1876.     } else {
  1877.       App.updateCaption();
  1878.       Popup.render(ai.url);
  1879.     }
  1880.   }
  1881.  
  1882.   static async startFromQ() {
  1883.     try {
  1884.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  1885.       const url = Ruler.runQ(responseText, doc, finalUrl);
  1886.       if (!url)
  1887.         throw 'File not found.';
  1888.       App.updateCaption(responseText, doc);
  1889.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  1890.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  1891.         if (!info || !info.url)
  1892.           throw `Couldn't follow URL: ${url}`;
  1893.         Object.assign(ai, info);
  1894.         Popup.startSingle();
  1895.       } else {
  1896.         Popup.render(url, finalUrl);
  1897.       }
  1898.     } catch (e) {
  1899.       App.handleError(e);
  1900.     }
  1901.   }
  1902.  
  1903.   static async startGallery() {
  1904.     App.setStatusLoading();
  1905.     try {
  1906.       const startUrl = ai.url;
  1907.       const p = ai.rule.s === 'gallery' ? {} :
  1908.         await Remoting.getDoc(startUrl);
  1909.       const items = await new Promise(resolve => {
  1910.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, resolve);
  1911.         if (Array.isArray(it))
  1912.           resolve(it);
  1913.       });
  1914.       // bail out if the gallery's async callback took too long
  1915.       if (ai.url !== startUrl)
  1916.         return;
  1917.       ai.gItems = items.length && items;
  1918.       if (ai.gItems) {
  1919.         ai.gIndex = Gallery.findIndex(ai.url);
  1920.         setTimeout(Gallery.next);
  1921.       } else {
  1922.         throw 'Empty gallery';
  1923.       }
  1924.     } catch (e) {
  1925.       App.handleError(e);
  1926.     }
  1927.   }
  1928.  
  1929.   static async render(src, pageUrl) {
  1930.     Popup.destroy();
  1931.     ai.imageUrl = src;
  1932.     if (ai.xhr && src)
  1933.       src = await Remoting.getImage(src, pageUrl).catch(App.handleError);
  1934.     if (!src)
  1935.       return;
  1936.     const p = ai.popup =
  1937.       src.startsWith('data:video') ||
  1938.       !src.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(src) ?
  1939.         PopupVideo.create() :
  1940.         $create('img');
  1941.     p.id = `${PREFIX}popup`;
  1942.     p.src = src;
  1943.     p.addEventListener('error', App.handleError);
  1944.     p.addEventListener('load', Popup.onLoad, {once: true});
  1945.     if (ai.zooming)
  1946.       p.addEventListener('transitionend', Popup.onZoom);
  1947.     doc.body.insertBefore(p, ai.bar || undefined);
  1948.     ai.timer = setTimeout(App.checkProgress, 0, {start: true});
  1949.   }
  1950.  
  1951.   static onLoad() {
  1952.     this.setAttribute('loaded', '');
  1953.     ai.popupLoaded = true;
  1954.     if (!ai.bar)
  1955.       App.updateFileInfo();
  1956.   }
  1957.  
  1958.   static onZoom() {
  1959.     return this.classList.remove(`${PREFIX}zooming`);
  1960.   }
  1961.  
  1962.   static move() {
  1963.     const p = ai.popup;
  1964.     if (!p)
  1965.       return;
  1966.     let x, y;
  1967.     const w = Math.round(ai.scale * ai.nwidth);
  1968.     const h = Math.round(ai.scale * ai.nheight);
  1969.     const cx = ai.clientX;
  1970.     const cy = ai.clientY;
  1971.     const vw = ai.view.width - ai.outline * 2;
  1972.     const vh = ai.view.height - ai.outline * 2;
  1973.     if (!ai.zoom && (!ai.gItems || ai.gItems.length < 2) && !cfg.center) {
  1974.       const r = ai.rect;
  1975.       const rx = (r.left + r.right) / 2;
  1976.       const ry = (r.top + r.bottom) / 2;
  1977.       if (vw - r.right - 40 > w + ai.mbw || w + ai.mbw < r.left - 40) {
  1978.         if (h + ai.mbh < vh - 60)
  1979.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1980.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1981.       } else if (vh - r.bottom - 40 > h + ai.mbh || h + ai.mbh < r.top - 40) {
  1982.         if (w + ai.mbw < vw - 60)
  1983.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1984.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1985.       }
  1986.     }
  1987.     if (x === undefined) {
  1988.       const mid = vw > w ?
  1989.         vw / 2 - w / 2 :
  1990.         -1 * clamp(5 / 3 * (cx / vw - 0.2), 0, 1) * (w - vw);
  1991.       x = Math.round(mid - (ai.pw + ai.mbw) / 2);
  1992.     }
  1993.     if (y === undefined) {
  1994.       const mid = vh > h ?
  1995.         vh / 2 - h / 2 :
  1996.         -1 * clamp(5 / 3 * (cy / vh - 0.2), 0, 1) * (h - vh);
  1997.       y = Math.round(mid - (ai.ph + ai.mbh) / 2);
  1998.     }
  1999.     p.style.cssText = `
  2000.       width: ${w}px !important;
  2001.       height: ${h}px !important;
  2002.       left: ${x + ai.outline}px !important;
  2003.       top: ${y + ai.outline}px !important;
  2004.     `;
  2005.   }
  2006.  
  2007.   static destroy() {
  2008.     const p = ai.popup;
  2009.     if (!p)
  2010.       return;
  2011.     p.removeEventListener('error', App.handleError);
  2012.     if (typeof p.pause === 'function')
  2013.       p.pause();
  2014.     if (!ai.lazyUnload) {
  2015.       if (p.src.startsWith('blob:'))
  2016.         URL.revokeObjectURL(p.src);
  2017.       p.src = '';
  2018.     }
  2019.     p.remove();
  2020.     ai.zoom = false;
  2021.     ai.popupLoaded = false;
  2022.     ai.popup = null;
  2023.   }
  2024. }
  2025.  
  2026. class PopupVideo {
  2027.   static create() {
  2028.     const p = $create('video');
  2029.     p.autoplay = true;
  2030.     p.loop = true;
  2031.     p.volume = 0.5;
  2032.     p.controls = false;
  2033.     p.addEventListener('progress', PopupVideo.progress);
  2034.     p.addEventListener('canplaythrough', PopupVideo.progressDone, {once: true});
  2035.     ai.bufferingBar = false;
  2036.     ai.bufferingStart = Date.now();
  2037.     return p;
  2038.   }
  2039.  
  2040.   static progress() {
  2041.     const {duration} = this;
  2042.     if (duration && this.buffered.length && Date.now() - ai.bufferingStart > 2000) {
  2043.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  2044.       if ((ai.bufferingBar |= pct > 0 && pct < 50))
  2045.         App.setBar(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  2046.     }
  2047.   }
  2048.  
  2049.   static progressDone() {
  2050.     this.removeEventListener('progress', PopupVideo.progress);
  2051.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`)) {
  2052.       App.setBar(false);
  2053.       App.updateFileInfo();
  2054.     }
  2055.   }
  2056. }
  2057.  
  2058. class Gallery {
  2059.  
  2060.   static makeParser(g) {
  2061.     return (
  2062.       typeof g === 'function' ? g :
  2063.         typeof g === 'string' ? Util.newFunction('text', 'doc', 'url', 'm', 'rule', 'cb', g) :
  2064.           Gallery.defaultParser
  2065.     );
  2066.   }
  2067.  
  2068.   static findIndex(gUrl) {
  2069.     const sel = gUrl.split('#')[1];
  2070.     if (!sel)
  2071.       return 0;
  2072.     if (/^\d+$/.test(sel))
  2073.       return parseInt(sel);
  2074.     for (let i = ai.gItems.length; i--;) {
  2075.       let {url} = ai.gItems[i];
  2076.       if (Array.isArray(url))
  2077.         url = url[0];
  2078.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  2079.         return i;
  2080.     }
  2081.     return 0;
  2082.   }
  2083.  
  2084.   static next(dir) {
  2085.     if (dir > 0 && (ai.gIndex += dir) >= ai.gItems.length) {
  2086.       ai.gIndex = 0;
  2087.     } else if (dir < 0 && (ai.gIndex += dir) < 0) {
  2088.       ai.gIndex = ai.gItems.length - 1;
  2089.     }
  2090.     const item = ai.gItems[ai.gIndex];
  2091.     if (Array.isArray(item.url)) {
  2092.       ai.urls = item.url.slice(1);
  2093.       ai.url = item.url[0];
  2094.     } else {
  2095.       ai.urls = null;
  2096.       ai.url = item.url;
  2097.     }
  2098.     Popup.destroy();
  2099.     Popup.startSingle();
  2100.     App.updateFileInfo();
  2101.     Gallery.preload(dir);
  2102.   }
  2103.  
  2104.   static preload(dir) {
  2105.     const i = ai.gIndex + dir;
  2106.     if (ai.popup && i >= 0 && i < ai.gItems.length) {
  2107.       ai.preloadUrl = ensureArray(ai.gItems[i].url)[0];
  2108.       ai.popup.addEventListener('load', Gallery.preloadOnLoad, {once: true});
  2109.     }
  2110.   }
  2111.  
  2112.   static preloadOnLoad() {
  2113.     $create('img', {src: ai.preloadUrl});
  2114.   }
  2115.  
  2116.   static defaultParser(text, doc, docUrl, m, rule) {
  2117.     const {g} = rule;
  2118.     const qEntry = g.entry;
  2119.     const qCaption = ensureArray(g.caption);
  2120.     const qImage = g.image;
  2121.     const qTitle = g.title;
  2122.     const fix =
  2123.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  2124.       (s => s.trim());
  2125.     const items = [...$$(qEntry || qImage, doc)]
  2126.       .map(processEntry)
  2127.       .filter(Boolean);
  2128.     items.title = processTitle();
  2129.     return items;
  2130.  
  2131.     function processEntry(entry) {
  2132.       const item = {};
  2133.       try {
  2134.         const img = qEntry ? $(qImage, entry) : entry;
  2135.         item.url = fix(Remoting.findFileUrl(img, docUrl), true);
  2136.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  2137.       } catch (e) {}
  2138.       return item.url && item;
  2139.     }
  2140.  
  2141.     function processCaption(selector) {
  2142.       const el = $(selector, this) ||
  2143.                  $orSelf(selector, this.previousElementSibling) ||
  2144.                  $orSelf(selector, this.nextElementSibling);
  2145.       return el && fix(el.textContent);
  2146.     }
  2147.  
  2148.     function processTitle() {
  2149.       const el = $(qTitle, doc);
  2150.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  2151.     }
  2152.  
  2153.     function $orSelf(selector, el) {
  2154.       if (el && !el.matches(qEntry))
  2155.         return el.matches(selector) ? el : $(selector, el);
  2156.     }
  2157.   }
  2158. }
  2159.  
  2160. class Remoting {
  2161.  
  2162.   static gmXhr(url, opts = {}) {
  2163.     if (ai.req)
  2164.       tryCatch.call(ai.req, ai.req.abort);
  2165.     return new Promise((resolve, reject) => {
  2166.       opts.url = url;
  2167.       if (!opts.method)
  2168.         opts.method = 'GET';
  2169.       opts.onload = opts.onerror = e => {
  2170.         ai.req = null;
  2171.         e.status < 400 && !e.error ?
  2172.           resolve(e) :
  2173.           reject(`Server error ${e.status} ${e.error}\nURL: ${url}`);
  2174.       };
  2175.       opts.timeout = opts.timeout || 10e3;
  2176.       opts.ontimeout = () => {
  2177.         ai.req = null;
  2178.         reject(`Timeout fetching ${url}`);
  2179.       };
  2180.       ai.req = GM_xmlhttpRequest(opts);
  2181.     });
  2182.   }
  2183.  
  2184.   static async getDoc(url) {
  2185.     const r = await (!ai.post ?
  2186.       Remoting.gmXhr(url) :
  2187.       Remoting.gmXhr(url, {
  2188.         method: 'POST',
  2189.         data: ai.post,
  2190.         headers: {
  2191.           'Content-Type': 'application/x-www-form-urlencoded',
  2192.           'Referer': url,
  2193.         },
  2194.       }));
  2195.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2196.     return r;
  2197.   }
  2198.  
  2199.   static async getImage(url, pageUrl) {
  2200.     ai.bufferingBar = false;
  2201.     ai.bufferingStart = Date.now();
  2202.     const response = await Remoting.gmXhr(url, {
  2203.       responseType: 'blob',
  2204.       headers: {
  2205.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2206.         Referer: pageUrl || typeof ai.xhr === 'function' ? ai.xhr(ai.match, ai.node, ai.rule) : url,
  2207.       },
  2208.       onprogress: Remoting.getImageProgress,
  2209.     });
  2210.     App.setBar(false);
  2211.     const type = Remoting.guessMimeType(response);
  2212.     let b = response.response;
  2213.     if (b.type !== type)
  2214.       b = b.slice(0, b.size, type);
  2215.     return ai.xhr === 'data' ?
  2216.       Remoting.blobToDataUrl(b) :
  2217.       URL.createObjectURL(b);
  2218.   }
  2219.  
  2220.   static getImageProgress(e) {
  2221.     if (!ai.bufferingBar && Date.now() - ai.bufferingStart > 3000 && e.loaded / e.total < 0.5)
  2222.       ai.bufferingBar = true;
  2223.     if (ai.bufferingBar) {
  2224.       const pct = e.loaded / e.total * 100 | 0;
  2225.       const size = e.total / 1024 | 0;
  2226.       App.setBar(`${pct}% of ${size} kiB`, 'xhr');
  2227.     }
  2228.   }
  2229.  
  2230.   static async findRedirect() {
  2231.     try {
  2232.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2233.         method: 'HEAD',
  2234.         headers: {
  2235.           'Referer': location.href.split('#', 1)[0],
  2236.         },
  2237.       });
  2238.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2239.       if (!info || !info.url)
  2240.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2241.       Object.assign(ai, info);
  2242.       Popup.startSingle();
  2243.     } catch (e) {
  2244.       App.handleError(e);
  2245.     }
  2246.   }
  2247.  
  2248.   static async saveFile() {
  2249.     let url = ai.popup.src || ai.popup.currentSrc;
  2250.     let name = Remoting.getFileName(ai.imageUrl || url);
  2251.     if (!name.includes('.'))
  2252.       name += '.jpg';
  2253.     try {
  2254.       if (!url.startsWith('blob:') && !url.startsWith('data:')) {
  2255.         const {response} = await Remoting.gmXhr(url, {
  2256.           responseType: 'blob',
  2257.           headers: {'Referer': url},
  2258.         });
  2259.         url = URL.createObjectURL(response);
  2260.         setTimeout(() => URL.revokeObjectURL(url), 1000);
  2261.       }
  2262.       $create('a', {href: url, download: name})
  2263.         .dispatchEvent(new MouseEvent('click'));
  2264.     } catch (e) {
  2265.       App.setBar(`Could not download ${name}.`, 'error');
  2266.     }
  2267.   }
  2268.  
  2269.   static getFileName(url) {
  2270.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2271.   }
  2272.  
  2273.   static blobToDataUrl(blob) {
  2274.     return new Promise((resolve, reject) => {
  2275.       const fr = new FileReader();
  2276.       fr.onload = () => resolve(fr.result);
  2277.       fr.onerror = reject;
  2278.       fr.readAsDataURL(blob);
  2279.     });
  2280.   }
  2281.  
  2282.   static guessMimeType({responseHeaders, finalUrl}) {
  2283.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2284.         !RegExp.$1.includes('text/plain'))
  2285.       return RegExp.$1;
  2286.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2287.     switch (ext.toLowerCase()) {
  2288.       case 'bmp': return 'image/bmp';
  2289.       case 'gif': return 'image/gif';
  2290.       case 'jpe': return 'image/jpeg';
  2291.       case 'jpeg': return 'image/jpeg';
  2292.       case 'jpg': return 'image/jpeg';
  2293.       case 'mp4': return 'video/mp4';
  2294.       case 'png': return 'image/png';
  2295.       case 'svg': return 'image/svg+xml';
  2296.       case 'tif': return 'image/tiff';
  2297.       case 'tiff': return 'image/tiff';
  2298.       case 'webm': return 'video/webm';
  2299.       default: return 'application/octet-stream';
  2300.     }
  2301.   }
  2302.  
  2303.   static findFileUrl(n, url) {
  2304.     const base = $('base[href]', n.ownerDocument);
  2305.     const path =
  2306.       n.getAttribute('src') ||
  2307.       n.getAttribute('data-m4v') ||
  2308.       n.getAttribute('href') ||
  2309.       n.getAttribute('content') ||
  2310.       /https?:\/\/[./a-z0-9_+%-]+\.(jpe?g|gif|png|svg|webm|mp4)/i.exec(n.outerHTML) &&
  2311.         RegExp.lastMatch;
  2312.     return path ? Util.rel2abs(path.trim(), base ? base.getAttribute('href') : url) : false;
  2313.   }
  2314. }
  2315.  
  2316. class Util {
  2317.  
  2318.   static addStyle(name, css) {
  2319.     const id = `${PREFIX}style:${name}`;
  2320.     const el = doc.getElementById(id) ||
  2321.                css && $create('style', {id});
  2322.     if (!el)
  2323.       return;
  2324.     if (el.textContent !== css)
  2325.       el.textContent = css;
  2326.     if (el.parentElement !== doc.head)
  2327.       doc.head.appendChild(el);
  2328.     return el;
  2329.   }
  2330.  
  2331.   static deepEqual(a, b) {
  2332.     if (typeof a !== typeof b)
  2333.       return false;
  2334.     if (!a || !b || typeof a !== 'object')
  2335.       return a === b;
  2336.     if (Array.isArray(a))
  2337.       return Array.isArray(b) &&
  2338.              a.length === b.length &&
  2339.              a.every((v, i) => Util.deepEqual(v, b[i]));
  2340.     const keys = Object.keys(a);
  2341.     return keys.length === Object.keys(b).length &&
  2342.            keys.every(k => Util.deepEqual(a[k], b[k]));
  2343.   }
  2344.  
  2345.   static findScale(url, parent) {
  2346.     const imgs = $$('img, video', parent);
  2347.     for (let i = imgs.length, img; (img = imgs[--i]);) {
  2348.       if ((img.src || img.currentSrc) !== url)
  2349.         continue;
  2350.       const scaleX = (img.naturalWidth || img.videoWidth) / img.offsetWidth;
  2351.       const scaleY = (img.naturalHeight || img.videoHeight) / img.offsetHeight;
  2352.       const s = Math.max(scaleX, scaleY);
  2353.       if (isFinite(s))
  2354.         return s;
  2355.     }
  2356.   }
  2357.  
  2358.   static forceLayout(node) {
  2359.     // eslint-disable-next-line no-unused-expressions
  2360.     node.clientHeight;
  2361.   }
  2362.  
  2363.   static formatError(e, rule) {
  2364.     let {message} = e;
  2365.     if (!message) {
  2366.       if (e.readyState)
  2367.         message = 'Request failed.';
  2368.       else if (e.type === 'error')
  2369.         message = "File can't be displayed." + (
  2370.           $('div[bgactive*="flashblock"]', doc) ?
  2371.             ' Check Flashblock settings.' :
  2372.             '');
  2373.       else
  2374.         message = e;
  2375.     }
  2376.     const m = [
  2377.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2378.       ['', 'font-weight:normal;color:unset'],
  2379.     ];
  2380.     if (rule.u)
  2381.       m.push(['Url simple match: %o', rule.u]);
  2382.     if (rule.r)
  2383.       m.push(['RegExp match: %o', rule.r]);
  2384.     if (ai.url)
  2385.       m.push(['URL: %s', ai.url]);
  2386.     if (ai.imageUrl && ai.imageUrl !== ai.url)
  2387.       m.push(['File: %s', ai.imageUrl]);
  2388.     m.push(['Node: %o', ai.node]);
  2389.     return {
  2390.       message,
  2391.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2392.       consoleArgs: m.map(([, v]) => v),
  2393.     };
  2394.   }
  2395.  
  2396.   static lazyGetRect(obj, node, selector) {
  2397.     return Object.defineProperty(obj, 'rect', {
  2398.       configurable: true,
  2399.       get() {
  2400.         const value = Util.rect(node, selector);
  2401.         Object.defineProperty(obj, 'rect', {value, configurable: true});
  2402.         return value;
  2403.       },
  2404.     });
  2405.   }
  2406.  
  2407.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2408.   static maybeDecodeURL(url) {
  2409.     if (!url)
  2410.       return url;
  2411.     const iPct = url.indexOf('%');
  2412.     const iColon = url.indexOf(':');
  2413.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2414.       decodeURIComponent(url) :
  2415.       url;
  2416.   }
  2417.  
  2418.   static newFunction(...args) {
  2419.     try {
  2420.       return App.NOP || new Function(...args);
  2421.     } catch (e) {
  2422.       if (!e.message.includes('unsafe-eval'))
  2423.         throw e;
  2424.       App.NOP = () => {};
  2425.       return App.NOP;
  2426.     }
  2427.   }
  2428.  
  2429.   static rect(node, selector) {
  2430.     let n = selector && node.closest(selector);
  2431.     if (n)
  2432.       return n.getBoundingClientRect();
  2433.     const nested = node.getElementsByTagName('*');
  2434.     let maxArea = 0;
  2435.     let maxBounds;
  2436.     n = node;
  2437.     for (let i = 0; n; n = nested[i++]) {
  2438.       const bounds = n.getBoundingClientRect();
  2439.       const area = bounds.width * bounds.height;
  2440.       if (area > maxArea) {
  2441.         maxArea = area;
  2442.         maxBounds = bounds;
  2443.         node = n;
  2444.       }
  2445.     }
  2446.     return maxBounds;
  2447.   }
  2448.  
  2449.   static rel2abs(rel, abs) {
  2450.     if (rel.startsWith('data:'))
  2451.       return rel;
  2452.     const rx = /^([a-z]+:)\/\//;
  2453.     if (rx.test(rel))
  2454.       return rel;
  2455.     if (!rx.test(abs))
  2456.       return;
  2457.     if (rel.indexOf('//') === 0)
  2458.       return RegExp.$1 + rel;
  2459.     if (rel[0] === '/')
  2460.       return abs.substr(0, abs.indexOf('/', RegExp.lastMatch.length)) + rel;
  2461.     return abs.substr(0, abs.lastIndexOf('/')) + '/' + rel;
  2462.   }
  2463.  
  2464.   static suppressHoverTooltip() {
  2465.     for (const n of [
  2466.       ai.node.parentNode,
  2467.       ai.node,
  2468.       ai.node.firstElementChild,
  2469.     ]) {
  2470.       if (n &&
  2471.           n.title &&
  2472.           n.title !== n.textContent &&
  2473.           !doc.title.includes(n.title) &&
  2474.           !/^http\S+$/.test(n.title)) {
  2475.         ai.tooltip = {
  2476.           node: n,
  2477.           text: n.title,
  2478.         };
  2479.         n.title = '';
  2480.         break;
  2481.       }
  2482.     }
  2483.   }
  2484.  
  2485.   static tabFixUrl() {
  2486.     return `data:text/html;charset=utf8,
  2487.       <style>
  2488.         body {
  2489.           margin: 0;
  2490.           padding: 0;
  2491.           background: #222
  2492.         }
  2493.         .fit {
  2494.           overflow: hidden
  2495.         }
  2496.         .fit > img {
  2497.           max-width: 100vw;
  2498.           max-height: 100vh
  2499.         }
  2500.         body > img {
  2501.           margin: auto;
  2502.           position: absolute;
  2503.           left: 0;
  2504.           right: 0;
  2505.           top: 0;
  2506.           bottom: 0
  2507.         }
  2508.       </style>
  2509.       <body class="fit">
  2510.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2511.       </body>
  2512.     `.replace(/[\r\n]+\s*/g, '').replace(/#/g, '%23');
  2513.   }
  2514. }
  2515.  
  2516. function $(s, n = doc) {
  2517.   return n.querySelector(s) || 0;
  2518. }
  2519.  
  2520. function $$(s, n = doc) {
  2521.   return n.querySelectorAll(s);
  2522. }
  2523.  
  2524. function $prop(s, prop, n = doc) {
  2525.   return (n.querySelector(s) || 0)[prop] || '';
  2526. }
  2527.  
  2528. function $many(q, doc) {
  2529.   for (const selector of q ? ensureArray(q) : []) {
  2530.     const el = $(selector, doc);
  2531.     if (el)
  2532.       return el;
  2533.   }
  2534. }
  2535.  
  2536. function $create(tag, props) {
  2537.   return Object.assign(document.createElement(tag), props);
  2538. }
  2539.  
  2540. function safeIncludes(a, b) {
  2541.   return typeof a === 'string' && a.includes(b);
  2542. }
  2543.  
  2544. function clamp(v, min, max) {
  2545.   return v < min ? min : v > max ? max : v;
  2546. }
  2547.  
  2548. function ensureArray(v) {
  2549.   return Array.isArray(v) ? v : [v];
  2550. }
  2551.  
  2552. function tryCatch(fn, ...args) {
  2553.   try {
  2554.     return fn.apply(this, args);
  2555.   } catch (e) {}
  2556. }
  2557.  
  2558. function setup({rule} = {}) {
  2559.   const MPIV_BASE_URL = 'https://w9p.co/userscripts/mpiv/';
  2560.   const SETUP_ID = `${PREFIX}setup`;
  2561.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2562.   let div = doc.getElementById(SETUP_ID);
  2563.   let root = div && div.shadowRoot;
  2564.   let {blankRuleElement} = setup;
  2565.   /** @type NodeList */
  2566.   const UI = new Proxy({}, {
  2567.     get(_, id) {
  2568.       return root.getElementById(id);
  2569.     },
  2570.   });
  2571.   if (!rule || !div)
  2572.     init(new Config({save: true}));
  2573.   if (rule)
  2574.     installRule(rule);
  2575.  
  2576.   function closeSetup(event) {
  2577.     if (event && this.id !== 'x') {
  2578.       cfg = collectConfig({save: true, clone: this.id === 'apply'});
  2579.       Ruler.init();
  2580.       if (this.id === 'apply')
  2581.         return;
  2582.     }
  2583.     const el = doc.getElementById(SETUP_ID);
  2584.     el && el.remove();
  2585.   }
  2586.  
  2587.   function collectConfig({save, clone} = {}) {
  2588.     const delay = parseInt(UI.delay.value);
  2589.     const scale = parseFloat(UI.scale.value.replace(',', '.'));
  2590.     let data = {
  2591.       css: UI.css.value.trim(),
  2592.       delay: !isNaN(delay) && delay >= 0 ? delay : undefined,
  2593.       hosts: collectRules(),
  2594.       scale: !isNaN(scale) ? Math.max(1, scale) : undefined,
  2595.       scales: UI.scales.value
  2596.         .trim()
  2597.         .split(/[,;]*\s+/)
  2598.         .map(x => x.replace(',', '.'))
  2599.         .filter(x => !isNaN(parseFloat(x))),
  2600.       start: UI.start.value,
  2601.       zoom: UI.zoom.value,
  2602.       zoomOut: UI.zoomOut.value,
  2603.     };
  2604.     for (const el of $$('[type="checkbox"]', root))
  2605.       data[el.id] = el.checked;
  2606.     if (clone)
  2607.       data = JSON.parse(JSON.stringify(data));
  2608.     return new Config({data, save});
  2609.   }
  2610.  
  2611.   function collectRules() {
  2612.     return [...UI.rules.children]
  2613.       .map(el => [el.value.trim(), el[RULE]])
  2614.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2615.       .map(([s, json]) => json || s)
  2616.       .filter(Boolean);
  2617.   }
  2618.  
  2619.   function exportSettings(e) {
  2620.     Events.drop(e);
  2621.     const txt = $create('textarea', {
  2622.       style: 'opacity:0; position:absolute',
  2623.       value: JSON.stringify(collectConfig(), null, '  '),
  2624.     });
  2625.     root.appendChild(txt);
  2626.     txt.select();
  2627.     txt.focus();
  2628.     document.execCommand('copy');
  2629.     e.target.focus();
  2630.     txt.remove();
  2631.     UI.exportNotification.hidden = false;
  2632.     setTimeout(() => (UI.exportNotification.hidden = true), 1000);
  2633.   }
  2634.  
  2635.   function importSettings(e) {
  2636.     Events.drop(e);
  2637.     const s = prompt('Paste settings:');
  2638.     if (s)
  2639.       init(new Config({data: s}));
  2640.   }
  2641.  
  2642.   function checkRule({target: el}) {
  2643.     let json, error;
  2644.     const prev = el.previousElementSibling;
  2645.     if (el.value) {
  2646.       json = Ruler.parse(el.value);
  2647.       error = json instanceof Error && (json.message || String(json));
  2648.       if (!prev)
  2649.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2650.     } else if (prev) {
  2651.       prev.focus();
  2652.       el.remove();
  2653.     }
  2654.     el[RULE] = !error && json;
  2655.     el.title = error || '';
  2656.     el.setCustomValidity(error || '');
  2657.   }
  2658.  
  2659.   function focusRule({type, target: el, relatedTarget: from}) {
  2660.     if (el === this)
  2661.       return;
  2662.     if (type === 'paste') {
  2663.       setTimeout(() => focusRule.call(this, {target: el}));
  2664.       return;
  2665.     }
  2666.     if (el[RULE])
  2667.       el.value = Ruler.format(el[RULE], {expand: true});
  2668.     const h = clamp(el.scrollHeight, 15, div.clientHeight / 4);
  2669.     if (h > el.offsetHeight)
  2670.       el.style.minHeight = h + 'px';
  2671.     if (!this.contains(from))
  2672.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2673.     if (from) {
  2674.       from.style.minHeight = '';
  2675.       if (from[RULE])
  2676.         from.value = Ruler.format(from[RULE]);
  2677.     }
  2678.   }
  2679.  
  2680.   function installRule(rule) {
  2681.     const inputs = UI.rules.children;
  2682.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2683.     if (!el) {
  2684.       el = inputs[0];
  2685.       el[RULE] = rule;
  2686.       el.value = Ruler.format(rule);
  2687.       el.hidden = false;
  2688.       const i = Math.max(0, collectRules().indexOf(rule));
  2689.       inputs[i].insertAdjacentElement('afterend', el);
  2690.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2691.     }
  2692.     const rect = el.getBoundingClientRect();
  2693.     if (rect.bottom < 0 ||
  2694.         rect.bottom > el.parentNode.offsetHeight)
  2695.       el.scrollIntoView();
  2696.     el.classList.add('highlight');
  2697.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2698.     el.focus();
  2699.   }
  2700.  
  2701.   function init(config) {
  2702.     closeSetup();
  2703.     div = $create('div', {
  2704.       id: SETUP_ID,
  2705.       // prevent the main page from interpreting key presses in inputs as hotkeys
  2706.       // which may happen since it sees only the outer <div> in the event |target|
  2707.       contentEditable: true,
  2708.     });
  2709.     root = div.attachShadow({mode: 'open'});
  2710.     root.innerHTML = `
  2711.       <style>
  2712.         :host {
  2713.           all: initial !important;
  2714.           position: fixed !important;
  2715.           z-index: 2147483647 !important;
  2716.           top: 20px !important;
  2717.           right: 20px !important;
  2718.           padding: 20px 30px !important;
  2719.           color: #000 !important;
  2720.           background: #eee !important;
  2721.           box-shadow: 5px 5px 25px 2px #000 !important;
  2722.           width: 500px !important;
  2723.           border: 1px solid black !important;
  2724.           display: flex !important;
  2725.           flex-direction: column !important;
  2726.         }
  2727.         main {
  2728.           font: 12px/15px sans-serif;
  2729.         }
  2730.         ul {
  2731.           max-height: calc(100vh - 200px);
  2732.           margin: 10px 0 15px 0;
  2733.           padding: 0;
  2734.           list-style: none;
  2735.         }
  2736.         li {
  2737.           margin: 0;
  2738.           padding: .25em 0;
  2739.         }
  2740.         li.options {
  2741.           display: flex;
  2742.           align-items: center;
  2743.           flex-wrap: wrap;
  2744.         }
  2745.         label {
  2746.           display: inline-flex;
  2747.           align-items: center;
  2748.         }
  2749.         label:not(:last-child) {
  2750.           margin-right: 1em;
  2751.         }
  2752.         label > :not(span) {
  2753.           margin-right: .25em;
  2754.         }
  2755.         label > :not(span):not(:first-child) {
  2756.           margin-left: .5em;
  2757.         }
  2758.         input:first-child {
  2759.           margin-left: 0;
  2760.         }
  2761.         input, select {
  2762.           min-height: 1.6em;
  2763.           box-sizing: border-box;
  2764.         }
  2765.         textarea {
  2766.           flex: 1;
  2767.           resize: vertical;
  2768.           margin: 1px 0;
  2769.           font: 11px/1.25 Consolas, monospace;
  2770.         }
  2771.         textarea:invalid {
  2772.           background-color: #f002;
  2773.           border-color: #800;
  2774.         }
  2775.         code {
  2776.           font-weight: bold;
  2777.         }
  2778.         a {
  2779.           text-decoration: none;
  2780.         }
  2781.         a:hover {
  2782.           text-decoration: underline;
  2783.         }
  2784.         button {
  2785.           padding: .2em 1em;
  2786.           margin: 0 1em;
  2787.         }
  2788.         .column {
  2789.           display: flex;
  2790.           flex-direction: column;
  2791.         }
  2792.         .highlight {
  2793.           animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  2794.           animation-fill-mode: both;
  2795.         }
  2796.         #rules textarea {
  2797.           word-break: break-all;
  2798.         }
  2799.         #x {
  2800.           position: absolute;
  2801.           top: 0;
  2802.           right: 0;
  2803.           padding: 4px 8px;
  2804.           cursor: pointer;
  2805.           user-select: none;
  2806.         }
  2807.         #x:hover {
  2808.           background-color: #8884;
  2809.         }
  2810.         @keyframes fade-in {
  2811.           from { background-color: deepskyblue }
  2812.           to {}
  2813.         }
  2814.         @media (prefers-color-scheme: dark) {
  2815.           :host {
  2816.             color: #aaa !important;
  2817.             background: #333 !important;
  2818.           }
  2819.           a {
  2820.             color: deepskyblue;
  2821.           }
  2822.           textarea, input, select {
  2823.             background: #111;
  2824.             color: #BBB;
  2825.             border-color: #555;
  2826.           }
  2827.           input[type="checkbox"] {
  2828.             filter: invert(1);
  2829.           }
  2830.         }
  2831.       </style>
  2832.       <main>
  2833.         <a href="${MPIV_BASE_URL}">${GM_info.script.name}</a>
  2834.         <div id="x">x</div>
  2835.         <ul class="column">
  2836.           <li class="options">
  2837.             <label>
  2838.               <span>Popup:</span>
  2839.               <select id="start">
  2840.                 <option value="auto">automatically
  2841.                 <option value="context">right click or ctrl
  2842.                 <option value="ctrl">ctrl
  2843.               </select>
  2844.             </label>
  2845.             <label>
  2846.               <span>after</span>
  2847.               <input id="delay" type="number" min="0" max="10000" step="50" style="width: 4em">
  2848.               <span>ms</span>
  2849.             </label>
  2850.             <label>
  2851.               <input type="checkbox" id="preload">
  2852.               <span>Start preloading immediately</span>
  2853.             </label>
  2854.           </li>
  2855.           <li class="options">
  2856.             <label>
  2857.               <span>Zoom:</span>
  2858.               <select id="zoom">
  2859.                 <option value="context">right click or shift
  2860.                 <option value="wheel">wheel up or shift
  2861.                 <option value="shift">shift
  2862.                 <option value="auto">automatically
  2863.               </select>
  2864.             </label>
  2865.             <label>
  2866.               <span>When zoomed out completely</span>
  2867.               <select id="zoomOut">
  2868.                 <option value="stay">stay in zoom mode
  2869.                 <option value="auto">stay if still hovered
  2870.                 <option value="close">close popup
  2871.               </select>
  2872.             </label>
  2873.           </li>
  2874.           <li class="options">
  2875.             <label>
  2876.               <span>Only show popup over scaled-down image when natural size is</span>
  2877.               <input id="scale" type="number" min="1" max="100" step=".05" style="width: 4em;">
  2878.               <span>times larger</span>
  2879.             </label>
  2880.           </li>
  2881.           <li class="options">
  2882.             <label>
  2883.               <span>Custom scale factors:</span>
  2884.               <input id="scales" style="width: 18em"
  2885.                      placeholder="${Config.DEFAULTS.scales.join(' ')}">
  2886.               <span title="${`
  2887.                 0 = fit to window
  2888.                 0! = same as 0 but also removes smaller values
  2889.                 * after value marks default zoom factor, example 1*
  2890.                 Values smaller than non-zoomed size are ignored.
  2891.               `.trim().replace(/\n\s+/g, '\n')}" style="cursor:help">(?)</span>
  2892.             </label>
  2893.           </li>
  2894.           <li class="options">
  2895.             <label><input type="checkbox" id="center"><span>Always centered</span></label>
  2896.             <label><input type="checkbox" id="imgtab"><span>Run in image tabs</span></label>
  2897.             <label title="Disable only if you spoof the HTTP headers yourself">
  2898.               <input type="checkbox" id="xhr">
  2899.               <span>Anti-hotlinking workaround</span>
  2900.             </label>
  2901.             <label>
  2902.               <input type="checkbox" id="globalStatus">
  2903.               <span>Expose status on &lt;html&gt; node (note: may cause noticeable slowdown)</small>
  2904.             </label>
  2905.           </li>
  2906.           <li>
  2907.             <div class="column">
  2908.               <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>
  2909.               <textarea id="css" spellcheck="false"></textarea>
  2910.             </div>
  2911.           </li>
  2912.           <li style="display: flex; justify-content: space-between;">
  2913.             <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  2914.             <div style="white-space: nowrap">
  2915.               To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  2916.               in "d" value, for example <code>"d": "!foo.com"</code>
  2917.             </div>
  2918.             <div>
  2919.               <input id="search" type="search" placeholder="Search"
  2920.                      style="width: 10em; margin-left: 1em">
  2921.             </div>
  2922.           </li>
  2923.           <li style="
  2924.             overflow-y: auto;
  2925.             margin-left: -3px;
  2926.             margin-right: -3px;
  2927.             padding-left: 3px;
  2928.             padding-right: 3px;
  2929.           ">
  2930.             <div id="rules" class="column">
  2931.               <textarea rows="1" spellcheck="false"></textarea>
  2932.             </div>
  2933.           </li>
  2934.           <li>
  2935.             <div hidden id="installLoading">
  2936.               Loading...
  2937.             </div>
  2938.             <div hidden id="installHint">
  2939.               Double-click the rule (or select and press Enter) to add it. Click OK when done.
  2940.             </div>
  2941.             <a href="${MPIV_BASE_URL}more_host_rules.html" id="install">
  2942.               Install rule from repository...</a>
  2943.           </li>
  2944.         </ul>
  2945.         <div style="text-align:center">
  2946.           <button id="ok" accesskey="s">Save</button>
  2947.           <button id="apply" accesskey="a">Apply</button>
  2948.           <button id="import" style="margin-right: 0">Import</button>
  2949.           <button id="export" style="margin-left: 0">Export</button>
  2950.           <button id="cancel">Cancel</button>
  2951.           <div id="exportNotification" hidden style="
  2952.             color: green;
  2953.             position: absolute;
  2954.             bottom: 2px;
  2955.             left: 0;
  2956.             right: 0;
  2957.             font-weight: bold;">Copied to clipboard.</div>
  2958.         </div>
  2959.       </main>
  2960.     `;
  2961.     // rules
  2962.     const rules = UI.rules;
  2963.     rules.addEventListener('input', checkRule);
  2964.     rules.addEventListener('focusin', focusRule);
  2965.     rules.addEventListener('paste', focusRule);
  2966.     blankRuleElement =
  2967.       setup.blankRuleElement =
  2968.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2969.     for (const rule of config.hosts || []) {
  2970.       const el = blankRuleElement.cloneNode();
  2971.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2972.       rules.appendChild(el);
  2973.       checkRule({target: el});
  2974.     }
  2975.     // search rules
  2976.     const search = UI.search;
  2977.     search.oninput = () => {
  2978.       setup.search = search.value;
  2979.       const s = search.value.toLowerCase();
  2980.       for (const el of rules.children)
  2981.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2982.     };
  2983.     search.value = setup.search || '';
  2984.     if (search.value)
  2985.       search.oninput();
  2986.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2987.     // which may happen since it sees only the outer <div> in the event |target|
  2988.     root.addEventListener('keydown', e =>
  2989.       !e.altKey && !e.ctrlKey && !e.metaKey && e.stopPropagation(), true);
  2990.     UI.apply.onclick = UI.cancel.onclick = UI.ok.onclick = UI.x.onclick = closeSetup;
  2991.     UI.css.value = config.css;
  2992.     UI.delay.value = config.delay;
  2993.     UI.export.onclick = exportSettings;
  2994.     UI.import.onclick = importSettings;
  2995.     UI.install.onclick = setupRuleInstaller;
  2996.     UI.scale.value = config.scale;
  2997.     UI.scales.value = config.scales.join(' ');
  2998.     UI.start.value = config.start;
  2999.     UI.start.onchange = function () {
  3000.       UI.delay.closest('label').hidden =
  3001.         UI.preload.closest('label').hidden =
  3002.           this.value !== 'auto';
  3003.     };
  3004.     UI.start.onchange();
  3005.     UI.xhr.onclick = ({target: el}) => el.checked || confirm(el.closest('[title]').title);
  3006.     UI.zoom.value = config.zoom;
  3007.     UI.zoomOut.value = config.zoomOut;
  3008.     for (const el of $$('[type="checkbox"]', root))
  3009.       el.checked = config[el.id];
  3010.     for (const el of $$('a[href^="http"]', root)) {
  3011.       el.target = '_blank';
  3012.       el.rel = 'noreferrer noopener external';
  3013.     }
  3014.     doc.body.appendChild(div);
  3015.     requestAnimationFrame(() => {
  3016.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, div.clientHeight / 4) + 'px';
  3017.     });
  3018.   }
  3019. }
  3020.  
  3021. async function setupRuleInstaller(e) {
  3022.   Events.drop(e);
  3023.   const parent = this.parentElement;
  3024.   parent.children.installLoading.hidden = false;
  3025.   this.remove();
  3026.   let rules;
  3027.  
  3028.   try {
  3029.     rules = extractRules((await Remoting.getDoc(this.href)).doc);
  3030.     const selector = $create('select', {
  3031.       size: 8,
  3032.       style: 'width: 100%',
  3033.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3034.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3035.     });
  3036.     selector.append(...rules.map(renderRule));
  3037.     selector.selectedIndex = findMatchingRuleIndex();
  3038.     // remove "name" since the installed rules don't need it
  3039.     for (const r of rules)
  3040.       delete r.name;
  3041.     parent.children.installLoading.remove();
  3042.     parent.children.installHint.hidden = false;
  3043.     parent.appendChild(selector);
  3044.   } catch (e) {
  3045.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3046.   }
  3047.  
  3048.   function extractRules(doc) {
  3049.     const code = $('script', doc).textContent;
  3050.     // sort by name
  3051.     return JSON.parse(code.match(/var\s+rules\s*=\s*(\[.+]);?[\r\n]/)[1])
  3052.       .filter(r => !r.d || hostname.includes(r.d))
  3053.       .sort((a, b) =>
  3054.         (a = a.name.toLowerCase()) < (b = b.name.toLowerCase()) ? -1 :
  3055.           a > b ? 1 :
  3056.             0);
  3057.   }
  3058.  
  3059.   function findMatchingRuleIndex() {
  3060.     // get the core part of the current domain that's not "www", "m", etc.
  3061.     const h = hostname.split('.');
  3062.     const core = h[0] === 'www' || h.length > 2 && h[0].length === 1 ? h[1] : h[0];
  3063.     // find a rule matching the domain core
  3064.     return rules.findIndex(r =>
  3065.       r.name.toLowerCase().includes(core) ||
  3066.       r.d && hostname.includes(r.d));
  3067.   }
  3068.  
  3069.   function renderRule(r) {
  3070.     const {name, ...copy} = r;
  3071.     return $create('option', {
  3072.       textContent: name,
  3073.       title: Ruler.format(copy, {expand: true})
  3074.         .replace(/^{|\s*}$/g, '')
  3075.         .split('\n')
  3076.         .slice(0, 12)
  3077.         .map(renderTitleLine)
  3078.         .filter(Boolean)
  3079.         .join('\n'),
  3080.     });
  3081.   }
  3082.  
  3083.   function renderTitleLine(line, i, arr) {
  3084.     return (
  3085.       // show ... on 10th line if there are more lines
  3086.       i === 9 && arr.length > 10 ? '...' :
  3087.         i > 10 ? '' :
  3088.           // truncate to 100 chars
  3089.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3090.             // strip the leading space
  3091.             .replace(/^\s/, ''));
  3092.   }
  3093.  
  3094.   function maybeSetup(e) {
  3095.     if (!e.altKey && !e.ctrlKey && !e.shiftKey && !e.metaKey)
  3096.       setup({rule: rules[e.currentTarget.selectedIndex]});
  3097.   }
  3098. }
  3099.  
  3100. App.init();