☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2020-01-08 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Mouseover Popup Image Viewer
  3. // @namespace   https://github.com/tophf
  4. // @description Shows images and videos behind links and thumbnails.
  5.  
  6. // @include     http*
  7. // @connect     *
  8.  
  9. // allow rule installer in config dialog https://w9p.co/userscripts/mpiv/more_host_rules.html
  10. // @connect     w9p.co
  11.  
  12. // @grant       GM_getValue
  13. // @grant       GM_setValue
  14. // @grant       GM_xmlhttpRequest
  15. // @grant       GM_openInTab
  16. // @grant       GM_registerMenuCommand
  17.  
  18. // @version     1.0.12
  19. // @author      tophf
  20.  
  21. // @original-version 2017.9.29
  22. // @original-author  kuehlschrank
  23.  
  24. // @supportURL  https://github.com/tophf/mpiv/issues
  25. // @homepage    https://w9p.co/userscripts/mpiv/
  26. // @icon        https://w9p.co/userscripts/mpiv/icon.png
  27. // ==/UserScript==
  28.  
  29. 'use strict';
  30.  
  31. const doc = document;
  32. const hostname = location.hostname;
  33. const dotDomain = '.' + hostname;
  34. const trustedDomains = ['greasyfork.org', 'w9p.co'];
  35. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  36. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  37.  
  38. const PREFIX = 'mpiv-';
  39. const STATUS_ATTR = `${PREFIX}status`;
  40. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  41. const PASSIVE = {passive: true};
  42. // time for volatile things to settle down meanwhile we postpone action
  43. // examples: loading image from cache, quickly moving mouse over one element to another
  44. const SETTLE_TIME = 50;
  45. // used to detect JS code in host rules
  46. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  47.  
  48. /** @type mpiv.Config */
  49. let cfg;
  50. /** @type mpiv.AppInfo */
  51. let ai = {rule: {}};
  52.  
  53. class App {
  54.  
  55.   static init() {
  56.     /** @type mpiv.Config */
  57.     Config.DEFAULTS = Object.assign(Object.create(null), {
  58.       center: false,
  59.       css: '',
  60.       delay: 500,
  61.       globalStatus: false,
  62.       // prefer ' inside rules because " will be displayed as \"
  63.       hosts: [{
  64.         name: 'No popup for YouTube thumbnails',
  65.         d: 'www.youtube.com',
  66.         e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  67.         s: '',
  68.       }, {
  69.         name: 'No popup for SVG/PNG icons',
  70.         d: '',
  71.         e: 'img[src*="icon"]',
  72.         r: /\/\/[^/]+\/.*\bicons?\b.*\.(?:png|svg)/,
  73.         s: '',
  74.       }],
  75.       imgtab: false,
  76.       preload: false,
  77.       scale: 1.25,
  78.       scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 5, 8, 16],
  79.       start: 'auto',
  80.       version: 6,
  81.       xhr: true,
  82.       zoom: 'context',
  83.       zoomOut: 'auto',
  84.     });
  85.     cfg = new Config({save: true});
  86.     App.isImageTab = doc.images.length === 1 &&
  87.                      doc.images[0].parentNode === doc.body &&
  88.                      !doc.links.length;
  89.     App.enabled = cfg.imgtab || !App.isImageTab;
  90.  
  91.     GM_registerMenuCommand('MPIV: configure', setup);
  92.     doc.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  93.  
  94.     if (isGoogleDomain && doc.getElementById('main'))
  95.       doc.getElementById('main').addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  96.  
  97.     if (trustedDomains.includes(hostname)) {
  98.       doc.addEventListener('click', e => {
  99.         const el = e.target.closest('blockquote, code, pre');
  100.         const text = el && el.textContent.trim();
  101.         let rule;
  102.         if (text && e.button === 0 &&
  103.             /^\s*{\s*"\w+"\s*:[\s\S]+}\s*$/.test(text) &&
  104.             (rule = tryCatch(JSON.parse, text))) {
  105.           setup({rule});
  106.           Events.drop(e);
  107.         }
  108.       });
  109.     }
  110.   }
  111.  
  112.   static activate(info, event) {
  113.     const force = event.ctrlKey;
  114.     if (!force) {
  115.       const scale = Util.findScale(info.url, info.node.parentNode);
  116.       if (scale && scale < cfg.scale)
  117.         return;
  118.     }
  119.     if (ai.node)
  120.       App.deactivate();
  121.     ai = info;
  122.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  123.     ai.view = {
  124.       width: view.clientWidth,
  125.       height: view.clientHeight,
  126.     };
  127.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  128.     Util.suppressHoverTooltip();
  129.     App.setListeners();
  130.     App.updateMouse(event);
  131.     if (force) {
  132.       Popup.start();
  133.     } else if (cfg.start === 'auto' && !ai.rule.manual) {
  134.       Popup.schedule();
  135.     } else {
  136.       App.setStatus('ready');
  137.     }
  138.   }
  139.  
  140.   static checkProgress({start} = {}) {
  141.     const p = ai.popup;
  142.     if (p) {
  143.       ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && 800;
  144.       ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && 1200;
  145.       if (ai.nheight) {
  146.         App.updateProgress();
  147.         clearInterval(ai.timerProgress);
  148.         clearTimeout(ai.timerStatus);
  149.         return;
  150.       }
  151.     }
  152.     if (start)
  153.       ai.timerProgress = setInterval(App.checkProgress, 150);
  154.   }
  155.  
  156.   static deactivate({wait} = {}) {
  157.     clearTimeout(ai.timer);
  158.     clearTimeout(ai.timerStatus);
  159.     clearInterval(ai.timerProgress);
  160.     if (ai.req)
  161.       tryCatch.call(ai.req, ai.req.abort);
  162.     if (ai.tooltip)
  163.       ai.tooltip.node.title = ai.tooltip.text;
  164.     App.setStatus(false);
  165.     App.setBar(false);
  166.     App.setListeners(false);
  167.     Popup.destroy();
  168.     if (wait) {
  169.       App.enabled = false;
  170.       setTimeout(App.enable, 200);
  171.     }
  172.     ai = {rule: {}};
  173.   }
  174.  
  175.   static enable() {
  176.     App.enabled = true;
  177.   }
  178.  
  179.   static handleError(e, rule = ai.rule) {
  180.     const fe = Util.formatError(e, rule);
  181.     if (!rule || !ai.urls || !ai.urls.length)
  182.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  183.     if (cfg.xhr && !ai.xhr && isGoogleImages) {
  184.       ai.xhr = true;
  185.       Popup.startSingle();
  186.     } else if (ai.urls && ai.urls.length) {
  187.       ai.url = ai.urls.shift();
  188.       ai.url ?
  189.         Popup.startSingle() :
  190.         App.deactivate();
  191.     } else if (ai.node) {
  192.       App.setStatus('error');
  193.       App.setBar(fe.message, 'error');
  194.     }
  195.   }
  196.  
  197.   static setBar(label, className) {
  198.     let b = ai.bar;
  199.     if (typeof label !== 'string') {
  200.       b && b.remove();
  201.       ai.bar = null;
  202.       return;
  203.     }
  204.     if (!b)
  205.       b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  206.     App.updateStyles();
  207.     App.updateTitle();
  208.     b.innerHTML = label;
  209.     if (!b.parentNode) {
  210.       doc.body.appendChild(b);
  211.       Util.forceLayout(b);
  212.     }
  213.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  214.   }
  215.  
  216.   static setListeners(enable = true) {
  217.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  218.     const passive = enable ? PASSIVE : undefined;
  219.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  220.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  221.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  222.     onOff.call(doc, 'contextmenu', Events.onContext);
  223.     onOff.call(doc, 'keydown', Events.onKeyDown);
  224.     onOff.call(doc, 'keyup', Events.onKeyUp);
  225.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  226.   }
  227.  
  228.   static setStatus(status) {
  229.     if (!status && !cfg.globalStatus) {
  230.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  231.       return;
  232.     }
  233.     const prefix = cfg.globalStatus ? PREFIX : '';
  234.     const action = status && /^[+-]/.test(status) && status[0];
  235.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  236.     const el = cfg.globalStatus ? doc.documentElement :
  237.       name === 'edge' ? ai.popup :
  238.         ai.node;
  239.     if (!el)
  240.       return;
  241.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  242.     const oldValue = (el.getAttribute(attr) || '').trim();
  243.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  244.     switch (action) {
  245.       case '-':
  246.         cls.delete(name);
  247.         break;
  248.       case false:
  249.         for (const c of cls)
  250.           if (c.startsWith(prefix) && c !== name)
  251.             cls.delete(c);
  252.         // fallthrough to +
  253.       case '+':
  254.         if (name)
  255.           cls.add(name);
  256.         break;
  257.     }
  258.     const newValue = [...cls].join(' ');
  259.     if (newValue !== oldValue)
  260.       el.setAttribute(attr, newValue);
  261.   }
  262.  
  263.   static setStatusLoading(force) {
  264.     if (!force) {
  265.       clearTimeout(ai.timerStatus);
  266.       ai.timerStatus = setTimeout(App.setStatusLoading, SETTLE_TIME, true);
  267.     } else if (!ai.popupLoaded) {
  268.       App.setStatus('+loading');
  269.     }
  270.   }
  271.  
  272.   static toggleZoom() {
  273.     const p = ai.popup;
  274.     if (!p || !ai.scales || ai.scales.length < 2)
  275.       return;
  276.     ai.zoom = !ai.zoom;
  277.     ai.zoomed = true;
  278.     const z = ai.scales.indexOf(ai.zscale);
  279.     ai.scale = ai.scales[ai.zoom ? (z > 0 ? z : 1) : 0];
  280.     if (ai.zooming)
  281.       p.classList.add(`${PREFIX}zooming`);
  282.     Popup.move();
  283.     App.updateTitle();
  284.     App.setStatus(ai.zoom ? 'zoom' : false);
  285.     if (!ai.zoom)
  286.       App.updateFileInfo();
  287.     return ai.zoom;
  288.   }
  289.  
  290.   static updateCaption(text, doc = document) {
  291.     switch (typeof ai.rule.c) {
  292.       case 'function':
  293.         // don't specify as a parameter's default value, instead get the html only when needed
  294.         if (text === undefined)
  295.           text = doc.documentElement.outerHTML;
  296.         ai.caption = ai.rule.c(text, doc, ai.node, ai.rule);
  297.         break;
  298.       case 'string': {
  299.         const el = $many(ai.rule.c, doc);
  300.         ai.caption = !el ? '' :
  301.           el.getAttribute('content') ||
  302.           el.getAttribute('title') ||
  303.           el.textContent;
  304.         break;
  305.       }
  306.       default: {
  307.         ai.caption = (ai.tooltip || 0).text || ai.node.alt || '';
  308.         if (ai.caption)
  309.           return;
  310.         const el = ai.node.closest('a[title], img[title], video[title]');
  311.         if (el && (ai.caption = el.title || ''))
  312.           return;
  313.         const url = ai.node.src || (ai.node.closest('[href]') || 0).href;
  314.         ai.caption = url ? Remoting.getFileName(url) : '';
  315.       }
  316.     }
  317.   }
  318.  
  319.   static updateFileInfo() {
  320.     const gi = ai.gItems;
  321.     if (gi) {
  322.       const item = gi[ai.gIndex];
  323.       let c = gi.length > 1 ? '[' + (ai.gIndex + 1) + '/' + gi.length + '] ' : '';
  324.       if (ai.gIndex === 0 && gi.title && (!item.desc || !safeIncludes(item.desc, gi.title)))
  325.         c += gi.title + (item.desc ? ' - ' : '');
  326.       if (item.desc)
  327.         c += item.desc;
  328.       if (c)
  329.         App.setBar(c.trim(), 'gallery', true);
  330.     } else if ('caption' in ai) {
  331.       App.setBar(ai.caption, 'caption');
  332.     } else if (ai.tooltip) {
  333.       App.setBar(ai.tooltip.text, 'tooltip');
  334.     } else {
  335.       App.setBar(' ', 'info');
  336.     }
  337.   }
  338.  
  339.   static updateMouse(e) {
  340.     const cx = ai.clientX = e.clientX;
  341.     const cy = ai.clientY = e.clientY;
  342.     const r = ai.rect;
  343.     if (r)
  344.       ai.isOverRect =
  345.         cx < r.right + 2 &&
  346.         cx > r.left - 2 &&
  347.         cy < r.bottom + 2 &&
  348.         cy > r.top - 2;
  349.   }
  350.  
  351.   static updateProgress() {
  352.     if (ai.preloadStart) {
  353.       const wait = ai.preloadStart + cfg.delay - Date.now();
  354.       if (wait > 0) {
  355.         ai.timer = setTimeout(App.checkProgress, wait);
  356.         return;
  357.       }
  358.     }
  359.     if (ai.urls && ai.urls.length && Math.max(ai.nheight, ai.nwidth) < 130) {
  360.       App.handleError({type: 'error'});
  361.       return;
  362.     }
  363.     App.setStatus(false);
  364.     Util.forceLayout(ai.popup);
  365.     ai.popup.className = `${PREFIX}show`;
  366.     App.updateSpacing();
  367.     App.updateScales();
  368.     App.updateTitle();
  369.     Popup.move();
  370.     if (!ai.bar)
  371.       App.updateFileInfo();
  372.     ai.large = ai.nwidth > ai.popup.clientWidth + ai.mbw ||
  373.                ai.nheight > ai.popup.clientHeight + ai.mbh;
  374.     if (ai.large)
  375.       App.setStatus('large');
  376.     if (cfg.imgtab && App.isImageTab || cfg.zoom === 'auto')
  377.       App.toggleZoom();
  378.   }
  379.  
  380.   static updateScales() {
  381.     const scales = cfg.scales.length ? cfg.scales : Config.DEFAULTS.scales.slice();
  382.     const fit = Math.min(
  383.       (ai.view.width - ai.mbw - ai.outline * 2) / ai.nwidth,
  384.       (ai.view.height - ai.mbh - ai.outline * 2) / ai.nheight);
  385.     let cutoff = ai.scale = Math.min(1, fit);
  386.     ai.scales = [];
  387.     for (let i = scales.length; i--;) {
  388.       const scale = scales[i];
  389.       const val = parseFloat(scale) || fit;
  390.       const option = typeof scale === 'string' && scale.slice(-1);
  391.       if (option === '!')
  392.         cutoff = val;
  393.       if (option === '*')
  394.         ai.zscale = val;
  395.       if (val !== ai.scale)
  396.         ai.scales.push(val);
  397.     }
  398.     ai.scales = ai.scales
  399.       .filter(x => x >= cutoff)
  400.       .sort((a, b) => a - b);
  401.     ai.scales.unshift(ai.scale);
  402.   }
  403.  
  404.   static updateSpacing() {
  405.     const s = getComputedStyle(ai.popup);
  406.     ai.outline =
  407.       (parseFloat(s['outline-offset']) || 0) +
  408.       (parseFloat(s['outline-width']) || 0);
  409.     ai.pw =
  410.       (parseFloat(s['padding-left']) || 0) +
  411.       (parseFloat(s['padding-right']) || 0);
  412.     ai.ph =
  413.       (parseFloat(s['padding-top']) || 0) +
  414.       (parseFloat(s['padding-bottom']) || 0);
  415.     ai.mbw =
  416.       (parseFloat(s['margin-left']) || 0) +
  417.       (parseFloat(s['margin-right']) || 0) +
  418.       (parseFloat(s['border-left-width']) || 0) +
  419.       (parseFloat(s['border-right-width']) || 0);
  420.     ai.mbh =
  421.       (parseFloat(s['margin-top']) || 0) +
  422.       (parseFloat(s['margin-bottom']) || 0) +
  423.       (parseFloat(s['border-top-width']) || 0) +
  424.       (parseFloat(s['border-bottom-width']) || 0);
  425.   }
  426.  
  427.   static updateStyles() {
  428.     Util.addStyle('global', /*language=CSS*/ App.globalStyle || (App.globalStyle = `
  429.       #${PREFIX}bar {
  430.         position: fixed;
  431.         z-index: 2147483647;
  432.         left: 0;
  433.         right: 0;
  434.         top: 0;
  435.         opacity: 0;
  436.         transition: opacity 1s ease .25s;
  437.         text-align: center;
  438.         font-family: sans-serif;
  439.         font-size: 15px;
  440.         font-weight: bold;
  441.         background: #0005;
  442.         color: white;
  443.         padding: 4px 10px;
  444.         text-shadow: .5px .5px 2px #000;
  445.       }
  446.       #${PREFIX}bar.${PREFIX}show {
  447.         opacity: 1;
  448.       }
  449.       #${PREFIX}bar[data-zoom]::after {
  450.         content: " (" attr(data-zoom) ")";
  451.         opacity: .8;
  452.       }
  453.       #${PREFIX}popup.${PREFIX}show {
  454.         display: inline;
  455.       }
  456.       #${PREFIX}popup {
  457.         display: none;
  458.         border: none;
  459.         box-sizing: content-box;
  460.         position: fixed;
  461.         z-index: 2147483647;
  462.         margin: 0;
  463.         max-width: none;
  464.         max-height: none;
  465.         will-change: display, width, height, left, top;
  466.         cursor: none;
  467.         animation: .2s ${PREFIX}fadein both;
  468.       }
  469.       #${PREFIX}popup.${PREFIX}show {
  470.         box-shadow: 6px 6px 30px transparent;
  471.         transition: box-shadow .25s, background-color .25s;
  472.       }
  473.       #${PREFIX}popup.${PREFIX}show[loaded] {
  474.         box-shadow: 6px 6px 30px black;
  475.         background-color: white;
  476.       }
  477.       @keyframes ${PREFIX}fadein {
  478.         from { opacity: 0; }
  479.         to { opacity: 1; }
  480.       }
  481.       ${cfg.globalStatus ? `
  482.         .${PREFIX}loading:not(.${PREFIX}preloading) * {
  483.           cursor: wait !important;
  484.         }
  485.         .${PREFIX}edge #${PREFIX}popup {
  486.           cursor: default;
  487.         }
  488.         .${PREFIX}error * {
  489.           cursor: not-allowed !important;
  490.         }
  491.         .${PREFIX}ready *, .${PREFIX}large * {
  492.           cursor: zoom-in !important;
  493.         }
  494.         .${PREFIX}shift * {
  495.           cursor: default !important;
  496.         }
  497.       ` : `
  498.         [${STATUS_ATTR}~="loading"]:not([${STATUS_ATTR}~="preloading"]) {
  499.           cursor: wait !important;
  500.         }
  501.         #${PREFIX}popup[${STATUS_ATTR}~="edge"] {
  502.           cursor: default !important;
  503.         }
  504.         [${STATUS_ATTR}~="error"] {
  505.           cursor: not-allowed !important;
  506.         }
  507.         [${STATUS_ATTR}~="ready"],
  508.         [${STATUS_ATTR}~="large"] {
  509.           cursor: zoom-in !important;
  510.         }
  511.         [${STATUS_ATTR}~="shift"] {
  512.           cursor: default !important;
  513.         }
  514.       `}
  515.       ${cfg.css.includes('{') ? cfg.css : `#${PREFIX}popup {${cfg.css}}`}
  516.     `));
  517.     Util.addStyle('rule', ai.rule.css || '');
  518.   }
  519.  
  520.   static updateTitle() {
  521.     if (!ai.bar)
  522.       return;
  523.     const zoom = `${Math.round(ai.scale * 100)}% - ${ai.nwidth} x ${ai.nheight} px`;
  524.     if (ai.bar.dataset.zoom !== zoom) {
  525.       ai.bar.dataset.zoom = zoom;
  526.       ai.bar.style.removeProperty('opacity');
  527.       clearTimeout(ai.timerBar);
  528.       ai.timerBar = setTimeout(() => ai.bar && ai.bar.style.setProperty('opacity', 0), 3000);
  529.     }
  530.   }
  531. }
  532.  
  533. class Config {
  534.   constructor({data: c = GM_getValue('cfg'), save}) {
  535.     if (typeof c === 'string')
  536.       c = tryCatch(JSON.parse, c);
  537.     if (typeof c !== 'object' || !c)
  538.       c = {};
  539.     const {DEFAULTS} = Config;
  540.     if (c.version !== DEFAULTS.version) {
  541.       if (typeof c.hosts === 'string')
  542.         c.hosts = c.hosts.split('\n')
  543.           .map(s => tryCatch(JSON.parse, s) || s)
  544.           .filter(Boolean);
  545.       if (c.close === true || c.close === false)
  546.         c.zoomOut = c.close ? 'auto' : 'stay';
  547.       for (const key in DEFAULTS)
  548.         if (typeof c[key] !== typeof DEFAULTS[key])
  549.           c[key] = DEFAULTS[key];
  550.       if (c.version === 3 && c.scales[0] === 0)
  551.         c.scales[0] = '0!';
  552.       for (const key in c)
  553.         if (!(key in DEFAULTS))
  554.           delete c[key];
  555.       c.version = DEFAULTS.version;
  556.       if (save)
  557.         GM_setValue('cfg', JSON.stringify(c));
  558.     }
  559.     if (cfg && (
  560.       cfg.css !== c.css ||
  561.       cfg.globalStatus !== c.globalStatus
  562.     )) {
  563.       App.globalStyle = '';
  564.     }
  565.     Object.assign(this, c);
  566.   }
  567. }
  568.  
  569. class Ruler {
  570. /*
  571.  'u' works only with URLs so it's ignored if 'html' is true
  572.    ||some.domain = matches some.domain, anything.some.domain, etc.
  573.    |foo = url or text must start with foo
  574.    ^ = separator like / or ? or : but not a letter/number, not %._-
  575.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  576.  'r' is checked only if 'u' matches first
  577. */
  578.   static init() {
  579.     const errors = new Map();
  580.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  581.     for (const rule of errors.keys())
  582.       App.handleError('Invalid custom host rule:', rule);
  583.  
  584.     // rules that disable previewing
  585.     const disablers = [
  586.       dotDomain.endsWith('.stackoverflow.com') && {
  587.         e: '.post-tag, .post-tag img',
  588.         s: '',
  589.       },
  590.       {
  591.         u: '||disqus.com/',
  592.         s: '',
  593.       },
  594.     ];
  595.  
  596.     // optimization: a rule is created only when on domain
  597.     const perDomain = [
  598.       hostname.includes('startpage') && {
  599.         r: /\boiu=(.+)/,
  600.         s: '$1',
  601.         follow: true,
  602.       },
  603.       dotDomain.endsWith('.4chan.org') && {
  604.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  605.         q: '.op .fileText a',
  606.         css: '#post-preview{display:none}',
  607.       },
  608.       hostname.includes('amazon.') && {
  609.         u: '/images/I/',
  610.         r: /.+?\/I\/.+?\./,
  611.         s: m => {
  612.           const uh = doc.getElementById('universal-hover');
  613.           return uh ? '' : m[0] + 'jpg';
  614.         },
  615.         css: '#zoomWindow{display:none!important;}',
  616.       },
  617.       dotDomain.endsWith('.bing.com') && {
  618.         e: 'a[m*="murl"]',
  619.         r: /murl&quot;:&quot;(.+?)&quot;/,
  620.         s: '$1',
  621.         html: true,
  622.       },
  623.       dotDomain.endsWith('.deviantart.com') && {
  624.         e: '[data-super-full-img] *, img[src*="/th/"]',
  625.         s: (m, node) => {
  626.           let el = node.closest('[data-super-full-img]');
  627.           if (el)
  628.             return el.dataset.superFullImg;
  629.           el = node.dataset.embedId && node.nextElementSibling;
  630.           if (el && el.dataset.embedId)
  631.             return el.src;
  632.         },
  633.       },
  634.       dotDomain.endsWith('.deviantart.com') && {
  635.         e: '.dev-view-deviation img',
  636.         s: () => [
  637.           ($('.dev-page-download') || 0).href,
  638.           ($('.dev-content-full') || 0).src,
  639.         ].filter(Boolean),
  640.       },
  641.       dotDomain.endsWith('.deviantart.com') && {
  642.         u: ',strp/',
  643.         s: '/\\/v1\\/.*//',
  644.       },
  645.       dotDomain.endsWith('.dropbox.com') && {
  646.         r: /(.+?&size_mode)=\d+(.*)/,
  647.         s: '$1=5$2',
  648.       },
  649.       dotDomain.endsWith('.facebook.com') && {
  650.         e: 'a[href*="ref=hovercard"]',
  651.         s: (m, node) =>
  652.           'https://www.facebook.com/photo.php?fbid=' +
  653.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  654.         follow: true,
  655.       },
  656.       dotDomain.endsWith('.facebook.com') && {
  657.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  658.         s: (m, node) =>
  659.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  660.             decodeURIComponent(m[4]),
  661.         html: true,
  662.         follow: true,
  663.       },
  664.       dotDomain.endsWith('.flickr.com') &&
  665.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  666.         u: '||flickr.com/photos/',
  667.         r: /photos\/[^/]+\/(\d+)/,
  668.         s: m => `https://www.flickr.com/services/rest/?${
  669.           new URLSearchParams({
  670.             photo_id: m[1],
  671.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  672.             method: 'flickr.photos.getSizes',
  673.             format: 'json',
  674.             nojsoncallback: 1,
  675.           }).toString()}`,
  676.         q: text => JSON.parse(text).sizes.size.pop().source,
  677.       },
  678.       dotDomain.endsWith('.github.com') && {
  679.         u: [
  680.           'avatars',
  681.           'raw.github.com',
  682.           '.png',
  683.           '.jpg',
  684.           '.jpeg',
  685.           '.bmp',
  686.           '.gif',
  687.           '.cur',
  688.           '.ico',
  689.         ],
  690.         r: new RegExp([
  691.           /(avatars.+?&s=)\d+/,
  692.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  693.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  694.         ].map(rx => rx.source).join('|')),
  695.         s: m => `https://${
  696.           m[1] ? `${m[1]}460` :
  697.             m[2] ? `${m[2]}usercontent${m[3]}` :
  698.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  699.         }`,
  700.       },
  701.       isGoogleImages && {
  702.         e: 'a',
  703.         u: '/imgres?imgurl=',
  704.         r: /imgurl=([^&]+)/,
  705.         s: '$1',
  706.       },
  707.       dotDomain.endsWith('.instagram.com') && {
  708.         e: [
  709.           'a[href*="/p/"]',
  710.           'a[role="button"][data-reactid*="scontent-"]',
  711.           'article div',
  712.           'article div div img',
  713.         ],
  714.         s: (m, node, rule) => {
  715.           const {a, data} = rule._getData(node) || {};
  716.           rule.follow = !data;
  717.           return (
  718.             !a ? false :
  719.               !data ? a.href :
  720.                 data.video_url || data.display_url);
  721.         },
  722.         c: (html, doc, node, rule) =>
  723.           tryCatch(() => rule._getData(node).data.edge_media_to_caption.edges[0].node.text) || '',
  724.         follow: true,
  725.         _getData(node) {
  726.           const n = node.closest('a[href*="/p/"], article');
  727.           if (!n)
  728.             return;
  729.           const a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  730.           if (!a)
  731.             return;
  732.           try {
  733.             const shortcode = a.pathname.match(/\/p\/(\w+)/)[1];
  734.             return {
  735.               a,
  736.               data: unsafeWindow._sharedData.entry_data.ProfilePage[0]
  737.                 .graphql.user.edge_owner_to_timeline_media.edges
  738.                 .find(e => e.node.shortcode === shortcode)
  739.                 .node,
  740.             };
  741.           } catch (e) {
  742.             return {a};
  743.           }
  744.         },
  745.       },
  746.       dotDomain.endsWith('.reddit.com') && {
  747.         u: '||i.reddituploads.com/',
  748.       },
  749.       dotDomain.endsWith('.reddit.com') && {
  750.         u: '||preview.redd.it/',
  751.         r: /(redd\.it\/\w+\.(jpe?g|png|gif))/,
  752.         s: 'https://i.$1',
  753.       },
  754.       dotDomain.endsWith('.tumblr.com') && {
  755.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  756.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  757.         follow: true,
  758.       },
  759.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  760.         e: 'a.media-item, a.js-media-image-link',
  761.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  762.         follow: true,
  763.       },
  764.       dotDomain.endsWith('.twitter.com') && {
  765.         e: '.grid-tweet > .media-overlay',
  766.         s: (m, node) => node.previousElementSibling.src,
  767.         follow: true,
  768.       },
  769.     ];
  770.  
  771.     const main = [
  772.       {
  773.         r: /[/?=](https?[^&]+)/,
  774.         s: '$1',
  775.         follow: true,
  776.       },
  777.       {
  778.         u: [
  779.           '||500px.com/photo/',
  780.           '||cl.ly/',
  781.           '||cweb-pix.com/',
  782.           '||ibb.co/',
  783.           '||imgcredit.xyz/image/',
  784.         ],
  785.         r: /\.\w+\/.+/,
  786.         q: 'meta[property="og:image"]',
  787.       },
  788.       {
  789.         u: 'attachment.php',
  790.         r: /attachment\.php.+attachmentid/,
  791.       },
  792.       {
  793.         u: '||abload.de/image',
  794.         q: '#image',
  795.       },
  796.       {
  797.         u: '||deviantart.com/art/',
  798.         s: (m, node) =>
  799.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  800.             '' :
  801.             m.input,
  802.         q: [
  803.           '#download-button[href*=".jpg"]',
  804.           '#download-button[href*=".jpeg"]',
  805.           '#download-button[href*=".gif"]',
  806.           '#download-button[href*=".png"]',
  807.           '#gmi-ResViewSizer_fullimg',
  808.           'img.dev-content-full',
  809.         ],
  810.       },
  811.       {
  812.         u: '||dropbox.com/s',
  813.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  814.         q: (text, doc) => {
  815.           const i = $('img.absolute-center', doc);
  816.           return i ? i.src.replace(/(size_mode)=\d+/, '$1=5') : false;
  817.         },
  818.       },
  819.       {
  820.         r: /[./]ebay\.[^/]+\/itm\//,
  821.         q: text =>
  822.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  823.             .replace(/~~60_\d+/, '~~60_57'),
  824.       },
  825.       {
  826.         u: '||i.ebayimg.com/',
  827.         s: (m, node) =>
  828.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  829.             m.input.replace(/~~60_\d+/, '~~60_57'),
  830.       },
  831.       {
  832.         u: '||fastpic.ru/view/',
  833.         q: '.image',
  834.       },
  835.       {
  836.         e: 'a',
  837.         u: '||fastpic.ru/',
  838.         r: /.+?\.\w+$/,
  839.         s: '$0?noht=1',
  840.       },
  841.       {
  842.         u: '||facebook.com/',
  843.         r: /photo\.php|[^/]+\/photos\//,
  844.         s: (m, node) =>
  845.           node.id === 'fbPhotoImage' ? false :
  846.             /gradient\.png$/.test(m.input) ? '' :
  847.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  848.         q: [
  849.           'div + span > a:first-child:not([href*="tag_faces"])',
  850.           'div + span > a[href*="tag_faces"] ~ a',
  851.         ],
  852.         rect: '#fbProfileCover',
  853.       },
  854.       {
  855.         u: '||fbcdn.',
  856.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  857.         s: m =>
  858.           dotDomain.endsWith('.facebook.com') &&
  859.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  860.           false,
  861.         manual: true,
  862.       },
  863.       {
  864.         u: ['||fbcdn-', 'fbcdn.net/'],
  865.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  866.         s: (m, node) => {
  867.           if (node.id === 'fbPhotoImage') {
  868.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  869.             if (a)
  870.               return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  871.           }
  872.           if (m[4])
  873.             return false;
  874.           if (node.parentNode.outerHTML.includes('/hovercard/'))
  875.             return '';
  876.           const gp = node.parentNode.parentNode;
  877.           if (node.outerHTML.includes('profile') && gp.href.includes('/photo'))
  878.             return false;
  879.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  880.         },
  881.         rect: '.photoWrap',
  882.       },
  883.       {
  884.         u: '||flickr.com/photos/',
  885.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  886.         s: m =>
  887.           m.input.indexOf('/sizes/') < 0 ?
  888.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  889.             false,
  890.         q: (text, doc) => {
  891.           const links = $$('.sizes-list a', doc);
  892.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  893.         },
  894.         follow: true,
  895.       },
  896.       {
  897.         u: '||flickr.com/photos/',
  898.         r: /\/sizes\//,
  899.         q: '#allsizes-photo > img',
  900.       },
  901.       {
  902.         u: '||gfycat.com/',
  903.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  904.         s: 'https://$1$3',
  905.         q: [
  906.           'meta[content$=".webm"]',
  907.           '#webmsource',
  908.           'source[src$=".webm"]',
  909.         ],
  910.       },
  911.       {
  912.         u: [
  913.           '||googleusercontent.com/proxy',
  914.           '||googleusercontent.com/gadgets/proxy',
  915.         ],
  916.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  917.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  918.       },
  919.       {
  920.         u: [
  921.           '||googleusercontent.com/',
  922.           '||ggpht.com/',
  923.         ],
  924.         s: (m, node) =>
  925.           m.input.includes('webcache.') ||
  926.           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/) ||
  927.           node.matches('.g-hovercard *, a[href*="profile_redirector"] > img') ?
  928.             '' :
  929.             m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  930.               .replace(/=[-\w]*\d+([&#].*|$)/, ''),
  931.       },
  932.       {
  933.         u: '||gravatar.com/',
  934.         r: /([a-z0-9]{32})/,
  935.         s: 'https://gravatar.com/avatar/$1?s=200',
  936.       },
  937.       {
  938.         u: '//gyazo.com/',
  939.         r: /\.com\/\w{32,}/,
  940.         q: 'meta[name="twitter:image"]',
  941.         xhr: true,
  942.       },
  943.       {
  944.         u: '||hostingkartinok.com/show-image.php',
  945.         q: '.image img',
  946.       },
  947.       {
  948.         u: [
  949.           '||imagecurl.com/images/',
  950.           '||imagecurl.com/viewer.php',
  951.         ],
  952.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  953.         s: 'https://imagecurl.com/images/$1$2$3',
  954.       },
  955.       {
  956.         u: '||imagebam.com/image/',
  957.         q: 'meta[property="og:image"]',
  958.         tabfix: true,
  959.         xhr: hostname.includes('planetsuzy'),
  960.       },
  961.       {
  962.         u: '||imageban.ru/thumbs',
  963.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  964.         s: '$1out$2/$3/$4',
  965.       },
  966.       {
  967.         u: [
  968.           '||imageban.ru/show',
  969.           '||imageban.net/show',
  970.           '||ibn.im/',
  971.         ],
  972.         q: '#img_main',
  973.       },
  974.       {
  975.         u: '||imageshack.us/img',
  976.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  977.         s: 'https://$2/download/$1/$3$4',
  978.       },
  979.       {
  980.         u: '||imageshack.us/i/',
  981.         q: '#share-dl',
  982.       },
  983.       {
  984.         u: '||imageteam.org/img',
  985.         q: 'img[alt="image"]',
  986.       },
  987.       {
  988.         u: [
  989.           '||imagetwist.com/',
  990.           '||imageshimage.com/',
  991.         ],
  992.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  993.         q: 'img.pic',
  994.         xhr: true,
  995.       },
  996.       {
  997.         u: '||imageupper.com/i/',
  998.         q: '#img',
  999.         xhr: true,
  1000.       },
  1001.       {
  1002.         u: '||imagevenue.com/img.php',
  1003.         q: '#thepic',
  1004.       },
  1005.       {
  1006.         u: '||imagezilla.net/show/',
  1007.         q: '#photo',
  1008.         xhr: true,
  1009.       },
  1010.       {
  1011.         u: [
  1012.           '||images-na.ssl-images-amazon.com/images/',
  1013.           '||media-imdb.com/images/',
  1014.         ],
  1015.         r: /images\/.+?\.jpg/,
  1016.         s: '/V1\\.?_.+?\\.//g',
  1017.       },
  1018.       {
  1019.         u: '||imgbox.com/',
  1020.         r: /\.com\/([a-z0-9]+)$/i,
  1021.         q: '#img',
  1022.         xhr: hostname !== 'imgbox.com',
  1023.       },
  1024.       {
  1025.         u: '||imgclick.net/',
  1026.         r: /\.net\/(\w+)/,
  1027.         q: 'img.pic',
  1028.         xhr: true,
  1029.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1030.       },
  1031.       {
  1032.         u: [
  1033.           '||imgflip.com/i/',
  1034.           '||imgflip.com/gif/',
  1035.         ],
  1036.         r: /\/(i|gif)\/([^/?#]+)/,
  1037.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1038.       },
  1039.       {
  1040.         u: [
  1041.           '||imgur.com/a/',
  1042.           '||imgur.com/gallery/',
  1043.           '||imgur.com/t/',
  1044.         ],
  1045.         g: async (text, doc, url, m, rule, cb) => {
  1046.           // simplified extraction of JSON as it occupies only one line
  1047.           if (!/(?:mergeConfig\('gallery',\s*|Imgur\.Album\.getInstance\()[\s\S]*?[,\s{"'](?:image|album)\s*:\s*({[^\r\n]+?}),?[\r\n]/.test(text))
  1048.             return;
  1049.           const info = JSON.parse(RegExp.$1);
  1050.           let images = info.is_album ? info.album_images.images : [info];
  1051.           if (info.num_images > images.length) {
  1052.             const url = `https://imgur.com/ajaxalbums/getimages/${info.hash}/hit.json?all=true`;
  1053.             images = JSON.parse((await Remoting.gmXhr(url)).responseText).data.images;
  1054.           }
  1055.           const items = [];
  1056.           for (const img of images || []) {
  1057.             const u = `https://i.imgur.com/${img.hash}`;
  1058.             items.push({
  1059.               url: img.ext === '.gif' && img.animated !== false ?
  1060.                 [`${u}.webm`, `${u}.mp4`, u] :
  1061.                 u + img.ext,
  1062.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1063.             });
  1064.           }
  1065.           if (images && info.is_album && !safeIncludes(items[0].desc, info.title))
  1066.             items.title = info.title;
  1067.           cb(items);
  1068.         },
  1069.         css: '.post > .hover { display:none!important; }',
  1070.       },
  1071.       {
  1072.         u: '||imgur.com/',
  1073.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1074.         s: 'gallery',
  1075.         g: (text, doc, url, m) =>
  1076.           m[2].split(',').map(id => ({
  1077.             url: `https://i.${m[1]}${id}.jpg`,
  1078.           })),
  1079.       },
  1080.       {
  1081.         u: '||imgur.com/',
  1082.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.([a-z]+))/i,
  1083.         s: (m, node) => {
  1084.           if (/memegen|random|register|search|signin/.test(m.input))
  1085.             return '';
  1086.           const a = node.closest('a');
  1087.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1088.             return false;
  1089.           const id = m[3].replace(/(.{7})[bhm]$/, '$1');
  1090.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1091.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1092.           return ext === 'webm' ?
  1093.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1094.             u + ext;
  1095.         },
  1096.       },
  1097.       {
  1098.         u: [
  1099.           '||instagr.am/p/',
  1100.           '||instagram.com/p/',
  1101.         ],
  1102.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1103.         q: text => {
  1104.           const m = JSON.parse(text).graphql.shortcode_media;
  1105.           return m.video_url || m.display_url;
  1106.         },
  1107.         rect: 'div.PhotoGridMediaItem',
  1108.         c: text => {
  1109.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1110.           return m === undefined ? '(no caption)' : m.node.text;
  1111.         },
  1112.       },
  1113.       {
  1114.         u: [
  1115.           '||livememe.com/',
  1116.           '||lvme.me/',
  1117.         ],
  1118.         r: /\.\w+\/([^.]+)$/,
  1119.         s: 'http://i.lvme.me/$1.jpg',
  1120.       },
  1121.       {
  1122.         u: '||lostpic.net/image',
  1123.         q: '.image-viewer-image img',
  1124.       },
  1125.       {
  1126.         u: '||makeameme.org/meme/',
  1127.         r: /\/meme\/([^/?#]+)/,
  1128.         s: 'https://media.makeameme.org/created/$1.jpg',
  1129.       },
  1130.       {
  1131.         u: '||photobucket.com/',
  1132.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1133.         s: 'https://i$1$3',
  1134.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1135.       },
  1136.       {
  1137.         u: '||piccy.info/view3/',
  1138.         r: /(.+?\/view3)\/(.*)\//,
  1139.         s: '$1/$2/orig/',
  1140.         q: '#mainim',
  1141.       },
  1142.       {
  1143.         u: '||pimpandhost.com/image/',
  1144.         r: /(.+?\/image\/[0-9]+)/,
  1145.         s: '$1?size=original',
  1146.         q: 'img.original',
  1147.       },
  1148.       {
  1149.         u: [
  1150.           '||pixroute.com/',
  1151.           '||imgspice.com/',
  1152.         ],
  1153.         r: /\.html$/,
  1154.         q: 'img[id]',
  1155.         xhr: true,
  1156.       },
  1157.       {
  1158.         u: '||postima',
  1159.         r: /postima?ge?\.org\/image\/\w+/,
  1160.         q: [
  1161.           'a[href*="dl="]',
  1162.           '#main-image',
  1163.         ],
  1164.       },
  1165.       {
  1166.         u: [
  1167.           '||prntscr.com/',
  1168.           '||prnt.sc/',
  1169.         ],
  1170.         r: /\.\w+\/.+/,
  1171.         q: 'meta[property="og:image"]',
  1172.         xhr: true,
  1173.       },
  1174.       {
  1175.         u: '||radikal.ru/',
  1176.         r: /\.ru\/(fp|.+\.html)/,
  1177.         q: text => text.match(/http:\/\/[a-z0-9]+\.radikal\.ru[a-z0-9/]+\.(jpg|gif|png)/i)[0],
  1178.       },
  1179.       {
  1180.         u: '||tumblr.com',
  1181.         r: /_500\.jpg/,
  1182.         s: ['/_500/_1280/', ''],
  1183.       },
  1184.       {
  1185.         u: '||twimg.com/',
  1186.         r: /\/profile_images/i,
  1187.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1188.       },
  1189.       {
  1190.         u: '||twimg.com/media/',
  1191.         r: /.+?format=(jpe?g|png|gif)/i,
  1192.         s: '$0&name=large',
  1193.       },
  1194.       {
  1195.         u: '||twimg.com/1/proxy',
  1196.         r: /t=([^&_]+)/i,
  1197.         s: m => atob(m[1]).match(/http.+/),
  1198.       },
  1199.       {
  1200.         u: '||pic.twitter.com/',
  1201.         r: /\.com\/[a-z0-9]+/i,
  1202.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1203.         follow: true,
  1204.       },
  1205.       {
  1206.         u: '||twitpic.com/',
  1207.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1208.         s: 'https://twitpic.com/show/large/$2',
  1209.       },
  1210.       {
  1211.         u: '||upix.me/files',
  1212.         s: '/#//',
  1213.       },
  1214.       {
  1215.         u: '||wiki',
  1216.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1217.         s: '/\\/thumb(?=\\/)|' +
  1218.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1219.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1220.         xhr: !hostname.includes('wiki'),
  1221.       },
  1222.       {
  1223.         u: '||ytimg.com/vi/',
  1224.         r: /(.+?\/vi\/[^/]+)/,
  1225.         s: '$1/0.jpg',
  1226.         rect: '.video-list-item',
  1227.       },
  1228.       {
  1229.         u: '/viewer.php?file=',
  1230.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1231.         s: '$1/images/$2',
  1232.         xhr: true,
  1233.       },
  1234.       {
  1235.         u: '/thumb_',
  1236.         r: /\/albums.+\/thumb_[^/]/,
  1237.         s: '/thumb_//',
  1238.       },
  1239.       {
  1240.         u: [
  1241.           '.th.jp',
  1242.           '.th.gif',
  1243.           '.th.png',
  1244.         ],
  1245.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1246.         s: '$1$2',
  1247.         follow: true,
  1248.       },
  1249.       {
  1250.         u: [
  1251.           '.jp',
  1252.           '.gif',
  1253.           '.png',
  1254.           '.svg',
  1255.           '.webm',
  1256.         ],
  1257.         r: /[^?:]+\.(jpe?g?|gif|png|svg|webm)($|\?)/i,
  1258.       },
  1259.     ];
  1260.  
  1261.     /** @type mpiv.HostRule[] */
  1262.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1263.   }
  1264.  
  1265.   static format(rule, {expand} = {}) {
  1266.     const s = JSON.stringify(rule, null, ' ');
  1267.     return expand ?
  1268.       /* {"a": ...,
  1269.           "b": ...,
  1270.           "c": ...
  1271.          } */
  1272.       s.replace(/^{\s+/g, '{') :
  1273.       /* {"a": ..., "b": ..., "c": ...} */
  1274.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1275.   }
  1276.  
  1277.   /** @returns mpiv.HostRule | Error | false | undefined */
  1278.   static parse(rule) {
  1279.     const isBatchOp = this instanceof Map;
  1280.     try {
  1281.       if (typeof rule === 'string')
  1282.         rule = JSON.parse(rule);
  1283.       if ('d' in rule && typeof rule.d !== 'string')
  1284.         rule.d = undefined;
  1285.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1286.         return false;
  1287.       const compileTo = isBatchOp ? rule : {};
  1288.       if (rule.r)
  1289.         compileTo.r = new RegExp(rule.r, 'i');
  1290.       if (RX_HAS_CODE.test(rule.s))
  1291.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1292.       if (RX_HAS_CODE.test(rule.q))
  1293.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1294.       if (RX_HAS_CODE.test(rule.c))
  1295.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1296.       return rule;
  1297.     } catch (e) {
  1298.       if (!e.message.includes('unsafe-eval'))
  1299.         if (isBatchOp) {
  1300.           this.set(rule, e);
  1301.         } else {
  1302.           return e;
  1303.         }
  1304.     }
  1305.   }
  1306.  
  1307.   static runQ(text, doc, docUrl) {
  1308.     let url;
  1309.     if (typeof ai.rule.q === 'function') {
  1310.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1311.       if (Array.isArray(url)) {
  1312.         ai.urls = url.slice(1);
  1313.         url = url[0];
  1314.       }
  1315.     } else {
  1316.       const el = $many(ai.rule.q, doc);
  1317.       url = el && Remoting.findFileUrl(el, docUrl);
  1318.     }
  1319.     return url;
  1320.   }
  1321.  
  1322.   static runS(node, rule, m) {
  1323.     let urls = [];
  1324.     for (const s of ensureArray(rule.s))
  1325.       urls.push(
  1326.         typeof s === 'string' ? Util.maybeDecodeURL(Ruler.substituteSingle(s, m)) :
  1327.           typeof s === 'function' ? s(m, node, rule) :
  1328.             s);
  1329.     if (rule.q && urls.length > 1) {
  1330.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1331.       return {skipRule: true};
  1332.     }
  1333.     if (Array.isArray(urls[0]))
  1334.       urls = urls[0];
  1335.     // `false` returned by "s" property means "skip this rule"
  1336.     // any other falsy value (like say "") means "stop all rules"
  1337.     return urls[0] === false ? {skipRule: true} : urls.map(Util.maybeDecodeURL);
  1338.   }
  1339.  
  1340.   static substituteSingle(s, m) {
  1341.     if (!m)
  1342.       return s;
  1343.     if (s.startsWith('/') && !s.startsWith('//')) {
  1344.       const mid = s.search(/[^\\]\//) + 1;
  1345.       const end = s.lastIndexOf('/');
  1346.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1347.       return m.input.replace(re, s.slice(mid + 1, end));
  1348.     }
  1349.     if (m.length && s.includes('$')) {
  1350.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  1351.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  1352.         for (let i = maxLength; i >= 0; i--) {
  1353.           const part = num.slice(0, i) | 0;
  1354.           if (part < m.length)
  1355.             return (m[part] || '') + num.slice(i);
  1356.         }
  1357.         return text;
  1358.       });
  1359.     }
  1360.     return s;
  1361.   }
  1362. }
  1363.  
  1364. const SimpleUrlMatcher = (() => {
  1365.   // string-to-regexp escaped chars
  1366.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  1367.   // rx for '^' symbol in simple url match
  1368.   const RX_SEP = /[^\w%._-]/g;
  1369.   const RXS_SEP = RX_SEP.source;
  1370.  
  1371.   function checkArray(s) {
  1372.     return this.some(checkArrayItem, s);
  1373.   }
  1374.  
  1375.   function checkArrayItem(item) {
  1376.     return item.fn.call(item.this, this);
  1377.   }
  1378.  
  1379.   function equals(s) {
  1380.     return s.startsWith(this) && (
  1381.       s.length === this.length ||
  1382.       s.length === this.length + 1 && endsWithSep(s));
  1383.   }
  1384.  
  1385.   function starts(s) {
  1386.     return s.startsWith(this);
  1387.   }
  1388.  
  1389.   function ends(s) {
  1390.     return s.endsWith(this) || (
  1391.       s.length > this.length &&
  1392.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  1393.       endsWithSep(s));
  1394.   }
  1395.  
  1396.   function has(s) {
  1397.     return s.includes(this);
  1398.   }
  1399.  
  1400.   function regexp(s) {
  1401.     return s.includes(this[0]) && this[1].test(s);
  1402.   }
  1403.  
  1404.   function endsWithSep(s) {
  1405.     RX_SEP.lastIndex = s.length - 1;
  1406.     return RX_SEP.test(s);
  1407.   }
  1408.  
  1409.   function startsDomainPrescreen(url) {
  1410.     return url.includes(this[0]) &&
  1411.            startsDomain.call(this, url);
  1412.   }
  1413.  
  1414.   function startsDomain(url) {
  1415.     const [p, gap, host] = url.split('/', 3);
  1416.     if (gap || p && !p.endsWith(':'))
  1417.       return;
  1418.     const [needle, domain, pinDomainEnd, endSep] = this;
  1419.     let start = pinDomainEnd ? host.length - domain.length : 0;
  1420.     for (; ; start++) {
  1421.       start = host.indexOf(domain, start);
  1422.       if (start < 0)
  1423.         return;
  1424.       if (!start || host[start - 1] === '.')
  1425.         break;
  1426.     }
  1427.     start += p.length + 2;
  1428.     return url.lastIndexOf(needle, start) === start &&
  1429.            (!endSep || start + needle.length === url.length);
  1430.   }
  1431.  
  1432.   function findLongestPart(s) {
  1433.     const len = s.length;
  1434.     let maxLen = 0;
  1435.     let start;
  1436.     for (let i = 0, j; i < len; i = j + 1) {
  1437.       j = s.indexOf('^', i);
  1438.       if (j < 0)
  1439.         j = len;
  1440.       if (j - i > maxLen) {
  1441.         maxLen = j - i;
  1442.         start = i;
  1443.       }
  1444.     }
  1445.     return maxLen < len ? s.substr(start, maxLen) : s;
  1446.   }
  1447.  
  1448.   return {
  1449.     compile(match) {
  1450.       const results = [];
  1451.       for (const s of ensureArray(match)) {
  1452.         const pinDomain = s.startsWith('||');
  1453.         const pinStart = !pinDomain && s.startsWith('|');
  1454.         const endSep = s.endsWith('^');
  1455.         let fn;
  1456.         let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  1457.         if (needle.includes('^')) {
  1458.           const plain = findLongestPart(needle);
  1459.           const rx = new RegExp(
  1460.             (pinStart ? '^' : '') +
  1461.             (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  1462.             needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  1463.             (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  1464.           needle = [plain, rx];
  1465.           fn = regexp;
  1466.         } else if (pinStart) {
  1467.           fn = endSep ? equals : starts;
  1468.         } else if (pinDomain) {
  1469.           const slashPos = needle.indexOf('/');
  1470.           const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  1471.           needle = [needle, domain, slashPos > 0, endSep];
  1472.           fn = startsDomainPrescreen;
  1473.         } else if (endSep) {
  1474.           fn = ends;
  1475.         } else {
  1476.           fn = has;
  1477.         }
  1478.         results.push({fn, this: needle});
  1479.       }
  1480.       return results.length > 1 ?
  1481.         {fn: checkArray, this: results} :
  1482.         results[0];
  1483.     },
  1484.   };
  1485. })();
  1486.  
  1487. class RuleMatcher {
  1488.  
  1489.   /** @returns ?mpiv.RuleMatchInfo */
  1490.   static findForLink(a) {
  1491.     let url =
  1492.       a.getAttribute('data-expanded-url') ||
  1493.       a.getAttribute('data-full-url') ||
  1494.       a.getAttribute('data-url') ||
  1495.       a.href;
  1496.     if (url.startsWith('data:'))
  1497.       url = false;
  1498.     else if (url.includes('//t.co/'))
  1499.       url = 'http://' + a.textContent;
  1500.     return RuleMatcher.find(url, a);
  1501.   }
  1502.  
  1503.   /** @returns ?mpiv.RuleMatchInfo */
  1504.   static find(url, node, {noHtml, skipRule} = {}) {
  1505.     const tn = node.tagName;
  1506.     let m, html, urls;
  1507.     for (const rule of Ruler.rules) {
  1508.       if (rule.e && !node.matches(rule.e) || rule === skipRule)
  1509.         continue;
  1510.       if (rule.html && rule.r && !noHtml && (tn === 'A' || tn === 'IMG' || rule.e))
  1511.         m = rule.r.exec(html || (html = node.outerHTML));
  1512.       else if (url)
  1513.         m = (rule.r || rule.u) ?
  1514.           RuleMatcher.makeUrlMatch(url, node, rule) :
  1515.           RuleMatcher.makeDummyMatch(url);
  1516.       if (!m ||
  1517.           // a rule with follow:true for the currently hovered IMG produced a URL,
  1518.           // but we'll only allow it to match rules without 's' in the nested find call
  1519.           tn === 'IMG' && !('s' in rule) && !skipRule)
  1520.         continue;
  1521.       if (rule.s === '')
  1522.         return {};
  1523.       const hasS = 's' in rule && rule.s !== 'gallery';
  1524.       urls = hasS ?
  1525.         Ruler.runS(node, rule, m) :
  1526.         [m.input];
  1527.       if (!urls.skipRule) {
  1528.         const url = urls[0];
  1529.         return !url ? {} :
  1530.           hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule) ?
  1531.             RuleMatcher.find(url, node, {skipRule: rule}) :
  1532.             RuleMatcher.makeInfo(urls, node, rule, m);
  1533.       }
  1534.     }
  1535.   }
  1536.  
  1537.   static makeUrlMatch(url, node, rule) {
  1538.     let {r, u} = rule;
  1539.     let m;
  1540.     if (u) {
  1541.       u = rule._u || (rule._u = SimpleUrlMatcher.compile(u));
  1542.       m = u.fn.call(u.this, url) && (r || RuleMatcher.makeDummyMatch(url));
  1543.     }
  1544.     return (m || !u) && r ? r.exec(url) : m;
  1545.   }
  1546.  
  1547.   static makeDummyMatch(url) {
  1548.     const m = [url];
  1549.     m.index = 0;
  1550.     m.input = url;
  1551.     return m;
  1552.   }
  1553.  
  1554.   /** @returns mpiv.RuleMatchInfo */
  1555.   static makeInfo(urls, node, rule, m) {
  1556.     const url = urls[0];
  1557.     const info = {
  1558.       node,
  1559.       rule,
  1560.       url,
  1561.       urls: urls.length > 1 ? urls.slice(1) : null,
  1562.       match: m,
  1563.       gallery: rule.g && Gallery.makeParser(rule.g),
  1564.       post: typeof rule.post === 'function' ? rule.post(m) : rule.post,
  1565.       xhr: cfg.xhr && rule.xhr,
  1566.     };
  1567.     Util.lazyGetRect(info, node, rule.rect);
  1568.     if (
  1569.       dotDomain.endsWith('.twitter.com') && !/(facebook|google|twimg|twitter)\.com\//.test(url) ||
  1570.       dotDomain.endsWith('.github.com') && !/github/.test(url) ||
  1571.       dotDomain.endsWith('.facebook.com') && /\bimgur\.com/.test(url)
  1572.     ) {
  1573.       info.xhr = 'data';
  1574.     }
  1575.     return info;
  1576.   }
  1577.  
  1578.   static isFollowableUrl(url, rule) {
  1579.     const f = rule.follow;
  1580.     return typeof f === 'function' ? f(url) : f;
  1581.   }
  1582. }
  1583.  
  1584. class Events {
  1585.  
  1586.   static drop(e) {
  1587.     e.preventDefault();
  1588.     e.stopPropagation();
  1589.   }
  1590.  
  1591.   static onMouseOver(e) {
  1592.     if (!App.enabled || e.shiftKey || ai.zoom)
  1593.       return;
  1594.     let node = e.target;
  1595.     if (node === ai.popup ||
  1596.         node === doc.body ||
  1597.         node === doc.documentElement)
  1598.       return;
  1599.  
  1600.     if (node.shadowRoot)
  1601.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  1602.  
  1603.     if (!Ruler.rules)
  1604.       Ruler.init();
  1605.  
  1606.     let a, img, url, info;
  1607.     if (node.tagName === 'A') {
  1608.       a = node;
  1609.     } else {
  1610.       if (node.tagName === 'IMG') {
  1611.         img = node;
  1612.         if (!img.src.startsWith('data:'))
  1613.           url = Util.rel2abs(img.src, location.href);
  1614.       }
  1615.       info = RuleMatcher.find(url, node);
  1616.       if (!info)
  1617.         a = node.closest('a');
  1618.     }
  1619.  
  1620.     if (!info && a)
  1621.       info = RuleMatcher.findForLink(a);
  1622.  
  1623.     if (!info && img) {
  1624.       info = Util.lazyGetRect({
  1625.         url: img.src,
  1626.         node: img,
  1627.         rule: {},
  1628.       }, img);
  1629.     }
  1630.  
  1631.     if (info && info.url && info.node !== ai.node)
  1632.       App.activate(info, e);
  1633.   }
  1634.  
  1635.   static pierceShadow(node, x, y) {
  1636.     for (let root; (root = node.shadowRoot);) {
  1637.       root.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  1638.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1639.       const inner = root.elementFromPoint(x, y);
  1640.       if (!inner || inner === node)
  1641.         break;
  1642.       node = inner;
  1643.     }
  1644.     return node;
  1645.   }
  1646.  
  1647.   static onMouseOut(e) {
  1648.     if (!e.relatedTarget && !e.shiftKey)
  1649.       App.deactivate();
  1650.   }
  1651.  
  1652.   static onMouseOutShadow(e) {
  1653.     const root = e.target.shadowRoot;
  1654.     if (root) {
  1655.       root.removeEventListener('mouseover', Events.onMouseOver);
  1656.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  1657.     }
  1658.   }
  1659.  
  1660.   static onMouseMove(e) {
  1661.     App.updateMouse(e);
  1662.     if (e.shiftKey) {
  1663.       ai.lazyUnload = true;
  1664.       return;
  1665.     }
  1666.     if (!ai.zoomed && !ai.isOverRect) {
  1667.       App.deactivate();
  1668.       return;
  1669.     }
  1670.     if (ai.zoom) {
  1671.       Popup.move();
  1672.       const {height: h, width: w} = ai.view;
  1673.       const {clientX: cx, clientY: cy} = ai;
  1674.       const bx = w / 6;
  1675.       const by = h / 6;
  1676.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  1677.       App.setStatus(`${onEdge ? '+' : '-'}edge`);
  1678.     }
  1679.   }
  1680.  
  1681.   static onMouseDown({shiftKey, button}) {
  1682.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  1683.       ai.controlled = ai.zoomed = true;
  1684.     } else if (button === 2 || shiftKey) {
  1685.       // we ignore RMB and Shift
  1686.     } else {
  1687.       App.deactivate({wait: true});
  1688.     }
  1689.   }
  1690.  
  1691.   static onMouseScroll(e) {
  1692.     const dir = (e.deltaY || -e.wheelDelta) > 0 ? 1 : -1;
  1693.     if (ai.zoom) {
  1694.       Events.drop(e);
  1695.       const i = ai.scales.indexOf(ai.scale) - dir;
  1696.       if (i >= 0 && i < ai.scales.length)
  1697.         ai.scale = ai.scales[i];
  1698.       if (i === 0 && cfg.zoomOut !== 'stay') {
  1699.         if ((cfg.zoomOut === 'close' || !ai.isOverRect) &&
  1700.             (!ai.gItems || ai.gItems.length < 2)) {
  1701.           App.deactivate({wait: true});
  1702.           return;
  1703.         }
  1704.         ai.zoom = false;
  1705.         ai.zoomed = false;
  1706.         App.updateFileInfo();
  1707.       }
  1708.       if (ai.zooming)
  1709.         ai.popup.classList.add(`${PREFIX}zooming`);
  1710.       Popup.move();
  1711.       App.updateTitle();
  1712.     } else if (ai.gItems && ai.gItems.length > 1 && ai.popup) {
  1713.       Events.drop(e);
  1714.       Gallery.next(dir);
  1715.     } else if (cfg.zoom === 'wheel' && dir < 0 && ai.popup) {
  1716.       Events.drop(e);
  1717.       App.toggleZoom();
  1718.     } else {
  1719.       App.deactivate();
  1720.     }
  1721.   }
  1722.  
  1723.   static onKeyDown(e) {
  1724.     switch (e.key) {
  1725.       case 'Shift':
  1726.         App.setStatus('+shift');
  1727.         if (ai.popup && 'controls' in ai.popup)
  1728.           ai.popup.controls = true;
  1729.         break;
  1730.       case 'Control':
  1731.         if (!ai.popup && (cfg.start !== 'auto' || ai.rule.manual))
  1732.           Popup.start();
  1733.         break;
  1734.     }
  1735.   }
  1736.  
  1737.   static onKeyUp(e) {
  1738.     switch (e.key.length > 1 ? e.key : e.code) {
  1739.       case 'Shift':
  1740.         App.setStatus('-shift');
  1741.         if ((ai.popup || {}).controls)
  1742.           ai.popup.controls = false;
  1743.         if (ai.controlled) {
  1744.           ai.controlled = false;
  1745.           return;
  1746.         }
  1747.         ai.popup && (ai.zoomed || ai.isOverRect !== false) ?
  1748.           App.toggleZoom() :
  1749.           App.deactivate({wait: true});
  1750.         break;
  1751.       case 'Control':
  1752.         break;
  1753.       case 'Escape':
  1754.         App.deactivate({wait: true});
  1755.         break;
  1756.       case 'ArrowRight':
  1757.       case 'KeyJ':
  1758.         Events.drop(e);
  1759.         Gallery.next(1);
  1760.         break;
  1761.       case 'ArrowLeft':
  1762.       case 'KeyK':
  1763.         Events.drop(e);
  1764.         Gallery.next(-1);
  1765.         break;
  1766.       case 'KeyD': {
  1767.         Events.drop(e);
  1768.         Remoting.saveFile();
  1769.         break;
  1770.       }
  1771.       case 'KeyT':
  1772.         ai.lazyUnload = true;
  1773.         GM_openInTab(
  1774.           ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  1775.           navigator.userAgent.includes('Gecko/') ?
  1776.             Util.tabFixUrl() :
  1777.             ai.popup.src);
  1778.         App.deactivate();
  1779.         break;
  1780.       default:
  1781.         App.deactivate({wait: true});
  1782.     }
  1783.   }
  1784.  
  1785.   static onContext(e) {
  1786.     if (e.shiftKey)
  1787.       return;
  1788.     if (cfg.zoom === 'context' && ai.popup && App.toggleZoom()) {
  1789.       Events.drop(e);
  1790.       return;
  1791.     }
  1792.     if (!ai.popup && (
  1793.       cfg.start === 'context' ||
  1794.       (cfg.start === 'auto' && ai.rule.manual)
  1795.     )) {
  1796.       Popup.start();
  1797.       Events.drop(e);
  1798.     } else {
  1799.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1800.     }
  1801.   }
  1802. }
  1803.  
  1804. class Popup {
  1805.  
  1806.   static schedule(force) {
  1807.     if (!cfg.preload) {
  1808.       ai.timer = setTimeout(Popup.start, cfg.delay);
  1809.     } else if (!force) {
  1810.       // we don't want to preload everything in the path of a quickly moving mouse cursor
  1811.       ai.timer = setTimeout(Popup.start, SETTLE_TIME, force);
  1812.       ai.preloadStart = Date.now();
  1813.     } else {
  1814.       App.setStatus('+preloading');
  1815.       setTimeout(App.setStatus, cfg.delay, '-preloading');
  1816.     }
  1817.   }
  1818.  
  1819.   static start() {
  1820.     App.updateStyles();
  1821.     ai.gallery ?
  1822.       Popup.startGallery() :
  1823.       Popup.startSingle();
  1824.   }
  1825.  
  1826.   static startSingle() {
  1827.     App.setStatusLoading();
  1828.     ai.imageUrl = null;
  1829.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  1830.       Remoting.findRedirect();
  1831.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  1832.       Popup.startFromQ();
  1833.     } else {
  1834.       App.updateCaption();
  1835.       Popup.render(ai.url);
  1836.     }
  1837.   }
  1838.  
  1839.   static async startFromQ() {
  1840.     try {
  1841.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  1842.       const url = Ruler.runQ(responseText, doc, finalUrl);
  1843.       if (!url)
  1844.         throw 'File not found.';
  1845.       App.updateCaption(responseText, doc);
  1846.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  1847.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  1848.         if (!info || !info.url)
  1849.           throw `Couldn't follow URL: ${url}`;
  1850.         Object.assign(ai, info);
  1851.         Popup.startSingle();
  1852.       } else {
  1853.         Popup.render(url, finalUrl);
  1854.       }
  1855.     } catch (e) {
  1856.       App.handleError(e);
  1857.     }
  1858.   }
  1859.  
  1860.   static async startGallery() {
  1861.     App.setStatusLoading();
  1862.     try {
  1863.       const startUrl = ai.url;
  1864.       const p = ai.rule.s === 'gallery' ? {} :
  1865.         await Remoting.getDoc(startUrl);
  1866.       const items = await new Promise(resolve => {
  1867.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, resolve);
  1868.         if (Array.isArray(it))
  1869.           resolve(it);
  1870.       });
  1871.       // bail out if the gallery's async callback took too long
  1872.       if (ai.url !== startUrl)
  1873.         return;
  1874.       ai.gItems = items.length && items;
  1875.       if (ai.gItems) {
  1876.         ai.gIndex = Gallery.findIndex(ai.url);
  1877.         setTimeout(Gallery.next);
  1878.       } else {
  1879.         throw 'Empty gallery';
  1880.       }
  1881.     } catch (e) {
  1882.       App.handleError(e);
  1883.     }
  1884.   }
  1885.  
  1886.   static async render(src, pageUrl = ai.url) {
  1887.     Popup.destroy();
  1888.     ai.imageUrl = src;
  1889.     if (ai.xhr && src)
  1890.       src = await Remoting.getImage(src, pageUrl).catch(App.handleError);
  1891.     if (!src)
  1892.       return;
  1893.     const p = ai.popup =
  1894.       src.startsWith('data:video') ||
  1895.       !src.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(src) ?
  1896.         PopupVideo.create() :
  1897.         $create('img');
  1898.     p.id = `${PREFIX}popup`;
  1899.     p.src = src;
  1900.     p.addEventListener('error', App.handleError);
  1901.     p.addEventListener('load', Popup.onLoad, {once: true});
  1902.     if (ai.zooming)
  1903.       p.addEventListener('transitionend', Popup.onZoom);
  1904.     doc.body.insertBefore(p, ai.bar || undefined);
  1905.     ai.timer = setTimeout(App.checkProgress, 0, {start: true});
  1906.   }
  1907.  
  1908.   static onLoad() {
  1909.     this.setAttribute('loaded', '');
  1910.     ai.popupLoaded = true;
  1911.     if (!ai.bar)
  1912.       App.updateFileInfo();
  1913.   }
  1914.  
  1915.   static onZoom() {
  1916.     return this.classList.remove(`${PREFIX}zooming`);
  1917.   }
  1918.  
  1919.   static move() {
  1920.     const p = ai.popup;
  1921.     if (!p)
  1922.       return;
  1923.     let x, y;
  1924.     const w = Math.round(ai.scale * ai.nwidth);
  1925.     const h = Math.round(ai.scale * ai.nheight);
  1926.     const cx = ai.clientX;
  1927.     const cy = ai.clientY;
  1928.     const vw = ai.view.width - ai.outline * 2;
  1929.     const vh = ai.view.height - ai.outline * 2;
  1930.     if (!ai.zoom && (!ai.gItems || ai.gItems.length < 2) && !cfg.center) {
  1931.       const r = ai.rect;
  1932.       const rx = (r.left + r.right) / 2;
  1933.       const ry = (r.top + r.bottom) / 2;
  1934.       if (vw - r.right - 40 > w + ai.mbw || w + ai.mbw < r.left - 40) {
  1935.         if (h + ai.mbh < vh - 60)
  1936.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1937.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1938.       } else if (vh - r.bottom - 40 > h + ai.mbh || h + ai.mbh < r.top - 40) {
  1939.         if (w + ai.mbw < vw - 60)
  1940.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1941.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1942.       }
  1943.     }
  1944.     if (x === undefined) {
  1945.       const mid = vw > w ?
  1946.         vw / 2 - w / 2 :
  1947.         -1 * clamp(5 / 3 * (cx / vw - 0.2), 0, 1) * (w - vw);
  1948.       x = Math.round(mid - (ai.pw + ai.mbw) / 2);
  1949.     }
  1950.     if (y === undefined) {
  1951.       const mid = vh > h ?
  1952.         vh / 2 - h / 2 :
  1953.         -1 * clamp(5 / 3 * (cy / vh - 0.2), 0, 1) * (h - vh);
  1954.       y = Math.round(mid - (ai.ph + ai.mbh) / 2);
  1955.     }
  1956.     p.style.cssText = `
  1957.       width: ${w}px !important;
  1958.       height: ${h}px !important;
  1959.       left: ${x + ai.outline}px !important;
  1960.       top: ${y + ai.outline}px !important;
  1961.     `;
  1962.   }
  1963.  
  1964.   static destroy() {
  1965.     const p = ai.popup;
  1966.     if (!p)
  1967.       return;
  1968.     p.removeEventListener('error', App.handleError);
  1969.     if (typeof p.pause === 'function')
  1970.       p.pause();
  1971.     if (!ai.lazyUnload) {
  1972.       if (p.src.startsWith('blob:'))
  1973.         URL.revokeObjectURL(p.src);
  1974.       p.src = '';
  1975.     }
  1976.     p.remove();
  1977.     ai.zoom = false;
  1978.     ai.popupLoaded = false;
  1979.     ai.popup = null;
  1980.   }
  1981. }
  1982.  
  1983. class PopupVideo {
  1984.   static create() {
  1985.     const p = $create('video');
  1986.     p.autoplay = true;
  1987.     p.loop = true;
  1988.     p.volume = 0.5;
  1989.     p.controls = false;
  1990.     p.addEventListener('progress', PopupVideo.progress);
  1991.     p.addEventListener('canplaythrough', PopupVideo.progressDone, {once: true});
  1992.     ai.bufferingBar = false;
  1993.     ai.bufferingStart = Date.now();
  1994.     return p;
  1995.   }
  1996.  
  1997.   static progress() {
  1998.     const {duration} = this;
  1999.     if (duration && this.buffered.length && Date.now() - ai.bufferingStart > 2000) {
  2000.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  2001.       if ((ai.bufferingBar |= pct > 0 && pct < 50))
  2002.         App.setBar(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  2003.     }
  2004.   }
  2005.  
  2006.   static progressDone() {
  2007.     this.removeEventListener('progress', PopupVideo.progress);
  2008.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`)) {
  2009.       App.setBar(false);
  2010.       App.updateFileInfo();
  2011.     }
  2012.   }
  2013. }
  2014.  
  2015. class Gallery {
  2016.  
  2017.   static makeParser(g) {
  2018.     return (
  2019.       typeof g === 'function' ? g :
  2020.         typeof g === 'string' ? Util.newFunction('text', 'doc', 'url', 'm', 'rule', 'cb', g) :
  2021.           Gallery.defaultParser
  2022.     );
  2023.   }
  2024.  
  2025.   static findIndex(gUrl) {
  2026.     const sel = gUrl.split('#')[1];
  2027.     if (!sel)
  2028.       return 0;
  2029.     if (/^\d+$/.test(sel))
  2030.       return parseInt(sel);
  2031.     for (let i = ai.gItems.length; i--;) {
  2032.       let {url} = ai.gItems[i];
  2033.       if (Array.isArray(url))
  2034.         url = url[0];
  2035.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  2036.         return i;
  2037.     }
  2038.     return 0;
  2039.   }
  2040.  
  2041.   static next(dir) {
  2042.     if (dir > 0 && (ai.gIndex += dir) >= ai.gItems.length) {
  2043.       ai.gIndex = 0;
  2044.     } else if (dir < 0 && (ai.gIndex += dir) < 0) {
  2045.       ai.gIndex = ai.gItems.length - 1;
  2046.     }
  2047.     const item = ai.gItems[ai.gIndex];
  2048.     if (Array.isArray(item.url)) {
  2049.       ai.urls = item.url.slice(1);
  2050.       ai.url = item.url[0];
  2051.     } else {
  2052.       ai.urls = null;
  2053.       ai.url = item.url;
  2054.     }
  2055.     Popup.destroy();
  2056.     Popup.startSingle();
  2057.     App.updateFileInfo();
  2058.     Gallery.preload(dir);
  2059.   }
  2060.  
  2061.   static preload(dir) {
  2062.     const i = ai.gIndex + dir;
  2063.     if (ai.popup && i >= 0 && i < ai.gItems.length) {
  2064.       ai.preloadUrl = ensureArray(ai.gItems[i].url)[0];
  2065.       ai.popup.addEventListener('load', Gallery.preloadOnLoad, {once: true});
  2066.     }
  2067.   }
  2068.  
  2069.   static preloadOnLoad() {
  2070.     $create('img', {src: ai.preloadUrl});
  2071.   }
  2072.  
  2073.   static defaultParser(text, doc, docUrl, m, rule) {
  2074.     const {g} = rule;
  2075.     const qEntry = g.entry;
  2076.     const qCaption = ensureArray(g.caption);
  2077.     const qImage = g.image;
  2078.     const qTitle = g.title;
  2079.     const fix =
  2080.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  2081.       (s => s.trim());
  2082.     const items = [...$$(qEntry || qImage, doc)]
  2083.       .map(processEntry)
  2084.       .filter(Boolean);
  2085.     items.title = processTitle();
  2086.     return items;
  2087.  
  2088.     function processEntry(entry) {
  2089.       const item = {};
  2090.       try {
  2091.         const img = qEntry ? $(qImage, entry) : entry;
  2092.         item.url = fix(Remoting.findFileUrl(img, docUrl), true);
  2093.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  2094.       } catch (e) {}
  2095.       return item.url && item;
  2096.     }
  2097.  
  2098.     function processCaption(selector) {
  2099.       const el = $(selector, this) ||
  2100.                  $orSelf(selector, this.previousElementSibling) ||
  2101.                  $orSelf(selector, this.nextElementSibling);
  2102.       return el && fix(el.textContent);
  2103.     }
  2104.  
  2105.     function processTitle() {
  2106.       const el = $(qTitle, doc);
  2107.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  2108.     }
  2109.  
  2110.     function $orSelf(selector, el) {
  2111.       if (el && !el.matches(qEntry))
  2112.         return el.matches(selector) ? el : $(selector, el);
  2113.     }
  2114.   }
  2115. }
  2116.  
  2117. class Remoting {
  2118.  
  2119.   static gmXhr(url, opts = {}) {
  2120.     if (ai.req)
  2121.       tryCatch.call(ai.req, ai.req.abort);
  2122.     return new Promise((resolve, reject) => {
  2123.       opts.url = url;
  2124.       if (!opts.method)
  2125.         opts.method = 'GET';
  2126.       opts.onload = opts.onerror = e => {
  2127.         ai.req = null;
  2128.         e.status < 400 && !e.error ?
  2129.           resolve(e) :
  2130.           reject(`Server error ${e.status} ${e.error}\nURL: ${url}`);
  2131.       };
  2132.       opts.timeout = opts.timeout || 10e3;
  2133.       opts.ontimeout = () => {
  2134.         ai.req = null;
  2135.         reject(`Timeout fetching ${url}`);
  2136.       };
  2137.       ai.req = GM_xmlhttpRequest(opts);
  2138.     });
  2139.   }
  2140.  
  2141.   static async getDoc(url) {
  2142.     const r = await (!ai.post ?
  2143.       Remoting.gmXhr(url) :
  2144.       Remoting.gmXhr(url, {
  2145.         method: 'POST',
  2146.         data: ai.post,
  2147.         headers: {
  2148.           'Content-Type': 'application/x-www-form-urlencoded',
  2149.           'Referer': url,
  2150.         },
  2151.       }));
  2152.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2153.     return r;
  2154.   }
  2155.  
  2156.   static async getImage(url, pageUrl) {
  2157.     ai.bufferingBar = false;
  2158.     ai.bufferingStart = Date.now();
  2159.     const response = await Remoting.gmXhr(url, {
  2160.       responseType: 'blob',
  2161.       headers: {
  2162.         'Accept': 'image/png,image/*;q=0.8,*/*;q=0.5',
  2163.         'Referer': pageUrl,
  2164.       },
  2165.       onprogress: Remoting.getImageProgress,
  2166.     });
  2167.     App.setBar(false);
  2168.     const type = Remoting.guessMimeType(response);
  2169.     let b = response.response;
  2170.     if (b.type !== type)
  2171.       b = b.slice(0, b.size, type);
  2172.     return ai.xhr === 'data' ?
  2173.       Remoting.blobToDataUrl(b) :
  2174.       URL.createObjectURL(b);
  2175.   }
  2176.  
  2177.   static getImageProgress(e) {
  2178.     if (!ai.bufferingBar && Date.now() - ai.bufferingStart > 3000 && e.loaded / e.total < 0.5)
  2179.       ai.bufferingBar = true;
  2180.     if (ai.bufferingBar) {
  2181.       const pct = e.loaded / e.total * 100 | 0;
  2182.       const size = e.total / 1024 | 0;
  2183.       App.setBar(`${pct}% of ${size} kiB`, 'xhr');
  2184.     }
  2185.   }
  2186.  
  2187.   static async findRedirect() {
  2188.     try {
  2189.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2190.         method: 'HEAD',
  2191.         headers: {
  2192.           'Referer': location.href.split('#', 1)[0],
  2193.         },
  2194.       });
  2195.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2196.       if (!info || !info.url)
  2197.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2198.       Object.assign(ai, info);
  2199.       Popup.startSingle();
  2200.     } catch (e) {
  2201.       App.handleError(e);
  2202.     }
  2203.   }
  2204.  
  2205.   static async saveFile() {
  2206.     let url = ai.popup.src || ai.popup.currentSrc;
  2207.     let name = Remoting.getFileName(ai.imageUrl || url);
  2208.     if (!name.includes('.'))
  2209.       name += '.jpg';
  2210.     try {
  2211.       if (!url.startsWith('blob:') && !url.startsWith('data:')) {
  2212.         const {response} = await Remoting.gmXhr(url, {
  2213.           responseType: 'blob',
  2214.           headers: {'Referer': url},
  2215.         });
  2216.         url = URL.createObjectURL(response);
  2217.         setTimeout(() => URL.revokeObjectURL(url), 1000);
  2218.       }
  2219.       $create('a', {href: url, download: name})
  2220.         .dispatchEvent(new MouseEvent('click'));
  2221.     } catch (e) {
  2222.       App.setBar(`Could not download ${name}.`, 'error');
  2223.     }
  2224.   }
  2225.  
  2226.   static getFileName(url) {
  2227.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2228.   }
  2229.  
  2230.   static blobToDataUrl(blob) {
  2231.     return new Promise((resolve, reject) => {
  2232.       const fr = new FileReader();
  2233.       fr.onload = () => resolve(fr.result);
  2234.       fr.onerror = reject;
  2235.       fr.readAsDataURL(blob);
  2236.     });
  2237.   }
  2238.  
  2239.   static guessMimeType({responseHeaders, finalUrl}) {
  2240.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2241.         !RegExp.$1.includes('text/plain'))
  2242.       return RegExp.$1;
  2243.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2244.     switch (ext.toLowerCase()) {
  2245.       case 'bmp': return 'image/bmp';
  2246.       case 'gif': return 'image/gif';
  2247.       case 'jpe': return 'image/jpeg';
  2248.       case 'jpeg': return 'image/jpeg';
  2249.       case 'jpg': return 'image/jpeg';
  2250.       case 'mp4': return 'video/mp4';
  2251.       case 'png': return 'image/png';
  2252.       case 'svg': return 'image/svg+xml';
  2253.       case 'tif': return 'image/tiff';
  2254.       case 'tiff': return 'image/tiff';
  2255.       case 'webm': return 'video/webm';
  2256.       default: return 'application/octet-stream';
  2257.     }
  2258.   }
  2259.  
  2260.   static findFileUrl(n, url) {
  2261.     const base = $('base[href]', n.ownerDocument);
  2262.     const path =
  2263.       n.getAttribute('src') ||
  2264.       n.getAttribute('data-m4v') ||
  2265.       n.getAttribute('href') ||
  2266.       n.getAttribute('content') ||
  2267.       /https?:\/\/[./a-z0-9_+%-]+\.(jpe?g|gif|png|svg|webm|mp4)/i.exec(n.outerHTML) &&
  2268.         RegExp.lastMatch;
  2269.     return path ? Util.rel2abs(path.trim(), base ? base.getAttribute('href') : url) : false;
  2270.   }
  2271. }
  2272.  
  2273. class Util {
  2274.  
  2275.   static addStyle(name, css) {
  2276.     const id = `${PREFIX}style:${name}`;
  2277.     const el = doc.getElementById(id) ||
  2278.                css && $create('style', {id});
  2279.     if (!el)
  2280.       return;
  2281.     if (el.textContent !== css)
  2282.       el.textContent = css;
  2283.     if (el.parentElement !== doc.head)
  2284.       doc.head.appendChild(el);
  2285.     return el;
  2286.   }
  2287.  
  2288.   static deepEqual(a, b) {
  2289.     if (typeof a !== typeof b)
  2290.       return false;
  2291.     if (!a || !b || typeof a !== 'object')
  2292.       return a === b;
  2293.     if (Array.isArray(a))
  2294.       return Array.isArray(b) &&
  2295.              a.length === b.length &&
  2296.              a.every((v, i) => Util.deepEqual(v, b[i]));
  2297.     const keys = Object.keys(a);
  2298.     return keys.length === Object.keys(b).length &&
  2299.            keys.every(k => Util.deepEqual(a[k], b[k]));
  2300.   }
  2301.  
  2302.   static findScale(url, parent) {
  2303.     const imgs = $$('img, video', parent);
  2304.     for (let i = imgs.length, img; (img = imgs[--i]);) {
  2305.       if ((img.src || img.currentSrc) !== url)
  2306.         continue;
  2307.       const scaleX = (img.naturalWidth || img.videoWidth) / img.offsetWidth;
  2308.       const scaleY = (img.naturalHeight || img.videoHeight) / img.offsetHeight;
  2309.       const s = Math.max(scaleX, scaleY);
  2310.       if (isFinite(s))
  2311.         return s;
  2312.     }
  2313.   }
  2314.  
  2315.   static forceLayout(node) {
  2316.     // eslint-disable-next-line no-unused-expressions
  2317.     node.clientHeight;
  2318.   }
  2319.  
  2320.   static formatError(e, rule) {
  2321.     let {message} = e;
  2322.     if (!message) {
  2323.       if (e.readyState)
  2324.         message = 'Request failed.';
  2325.       else if (e.type === 'error')
  2326.         message = "File can't be displayed." + (
  2327.           $('div[bgactive*="flashblock"]', doc) ?
  2328.             ' Check Flashblock settings.' :
  2329.             '');
  2330.       else
  2331.         message = e;
  2332.     }
  2333.     const m = [
  2334.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2335.       ['', 'font-weight:normal;color:unset'],
  2336.     ];
  2337.     if (rule.u)
  2338.       m.push(['Url simple match: %o', rule.u]);
  2339.     if (rule.r)
  2340.       m.push(['RegExp match: %o', rule.r]);
  2341.     if (ai.url)
  2342.       m.push(['URL: %s', ai.url]);
  2343.     if (ai.imageUrl && ai.imageUrl !== ai.url)
  2344.       m.push(['File: %s', ai.imageUrl]);
  2345.     m.push(['Node: %o', ai.node]);
  2346.     return {
  2347.       message,
  2348.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2349.       consoleArgs: m.map(([, v]) => v),
  2350.     };
  2351.   }
  2352.  
  2353.   static lazyGetRect(obj, node, selector) {
  2354.     return Object.defineProperty(obj, 'rect', {
  2355.       configurable: true,
  2356.       get() {
  2357.         const value = Util.rect(node, selector);
  2358.         Object.defineProperty(obj, 'rect', {value, configurable: true});
  2359.         return value;
  2360.       },
  2361.     });
  2362.   }
  2363.  
  2364.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2365.   static maybeDecodeURL(url) {
  2366.     if (!url)
  2367.       return url;
  2368.     const iPct = url.indexOf('%');
  2369.     const iColon = url.indexOf(':');
  2370.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2371.       decodeURIComponent(url) :
  2372.       url;
  2373.   }
  2374.  
  2375.   static newFunction(...args) {
  2376.     try {
  2377.       return App.NOP || new Function(...args);
  2378.     } catch (e) {
  2379.       if (!e.message.includes('unsafe-eval'))
  2380.         throw e;
  2381.       App.NOP = () => {};
  2382.       return App.NOP;
  2383.     }
  2384.   }
  2385.  
  2386.   static rect(node, selector) {
  2387.     let n = selector && node.closest(selector);
  2388.     if (n)
  2389.       return n.getBoundingClientRect();
  2390.     const nested = node.getElementsByTagName('*');
  2391.     let maxArea = 0;
  2392.     let maxBounds;
  2393.     n = node;
  2394.     for (let i = 0; n; n = nested[i++]) {
  2395.       const bounds = n.getBoundingClientRect();
  2396.       const area = bounds.width * bounds.height;
  2397.       if (area > maxArea) {
  2398.         maxArea = area;
  2399.         maxBounds = bounds;
  2400.         node = n;
  2401.       }
  2402.     }
  2403.     return maxBounds;
  2404.   }
  2405.  
  2406.   static rel2abs(rel, abs) {
  2407.     if (rel.startsWith('data:'))
  2408.       return rel;
  2409.     const rx = /^([a-z]+:)\/\//;
  2410.     if (rx.test(rel))
  2411.       return rel;
  2412.     if (!rx.test(abs))
  2413.       return;
  2414.     if (rel.indexOf('//') === 0)
  2415.       return RegExp.$1 + rel;
  2416.     if (rel[0] === '/')
  2417.       return abs.substr(0, abs.indexOf('/', RegExp.lastMatch.length)) + rel;
  2418.     return abs.substr(0, abs.lastIndexOf('/')) + '/' + rel;
  2419.   }
  2420.  
  2421.   static suppressHoverTooltip() {
  2422.     for (const n of [
  2423.       ai.node.parentNode,
  2424.       ai.node,
  2425.       ai.node.firstElementChild,
  2426.     ]) {
  2427.       if (n &&
  2428.           n.title &&
  2429.           n.title !== n.textContent &&
  2430.           !doc.title.includes(n.title) &&
  2431.           !/^http\S+$/.test(n.title)) {
  2432.         ai.tooltip = {
  2433.           node: n,
  2434.           text: n.title,
  2435.         };
  2436.         n.title = '';
  2437.         break;
  2438.       }
  2439.     }
  2440.   }
  2441.  
  2442.   static tabFixUrl() {
  2443.     return `data:text/html;charset=utf8,
  2444.       <style>
  2445.         body {
  2446.           margin: 0;
  2447.           padding: 0;
  2448.           background: #222
  2449.         }
  2450.         .fit {
  2451.           overflow: hidden
  2452.         }
  2453.         .fit > img {
  2454.           max-width: 100vw;
  2455.           max-height: 100vh
  2456.         }
  2457.         body > img {
  2458.           margin: auto;
  2459.           position: absolute;
  2460.           left: 0;
  2461.           right: 0;
  2462.           top: 0;
  2463.           bottom: 0
  2464.         }
  2465.       </style>
  2466.       <body class="fit">
  2467.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2468.       </body>
  2469.     `.replace(/[\r\n]+\s*/g, '').replace(/#/g, '%23');
  2470.   }
  2471. }
  2472.  
  2473. function $(s, n = doc) {
  2474.   return n.querySelector(s);
  2475. }
  2476.  
  2477. function $$(s, n = doc) {
  2478.   return n.querySelectorAll(s);
  2479. }
  2480.  
  2481. function $many(q, doc) {
  2482.   for (const selector of q ? ensureArray(q) : []) {
  2483.     const el = $(selector, doc);
  2484.     if (el)
  2485.       return el;
  2486.   }
  2487. }
  2488.  
  2489. function $create(tag, props) {
  2490.   return Object.assign(document.createElement(tag), props);
  2491. }
  2492.  
  2493. function safeIncludes(a, b) {
  2494.   return typeof a === 'string' && a.includes(b);
  2495. }
  2496.  
  2497. function clamp(v, min, max) {
  2498.   return v < min ? min : v > max ? max : v;
  2499. }
  2500.  
  2501. function ensureArray(v) {
  2502.   return Array.isArray(v) ? v : [v];
  2503. }
  2504.  
  2505. function tryCatch(fn, ...args) {
  2506.   try {
  2507.     return fn.apply(this, args);
  2508.   } catch (e) {}
  2509. }
  2510.  
  2511. function setup({rule} = {}) {
  2512.   const MPIV_BASE_URL = 'https://w9p.co/userscripts/mpiv/';
  2513.   const SETUP_ID = `${PREFIX}setup`;
  2514.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2515.   let div = doc.getElementById(SETUP_ID);
  2516.   let root = div && div.shadowRoot;
  2517.   let {blankRuleElement} = setup;
  2518.   /** @type NodeList */
  2519.   const UI = new Proxy({}, {
  2520.     get(_, id) {
  2521.       return root.getElementById(id);
  2522.     },
  2523.   });
  2524.   if (!rule || !div)
  2525.     init(new Config({save: true}));
  2526.   if (rule)
  2527.     installRule(rule);
  2528.  
  2529.   function closeSetup(event) {
  2530.     if (event && this.id !== 'x') {
  2531.       cfg = collectConfig({save: true, clone: this.id === 'apply'});
  2532.       Ruler.init();
  2533.       if (this.id === 'apply')
  2534.         return;
  2535.     }
  2536.     const el = doc.getElementById(SETUP_ID);
  2537.     el && el.remove();
  2538.   }
  2539.  
  2540.   function collectConfig({save, clone} = {}) {
  2541.     const delay = parseInt(UI.delay.value);
  2542.     const scale = parseFloat(UI.scale.value.replace(',', '.'));
  2543.     let data = {
  2544.       css: UI.css.value.trim(),
  2545.       delay: !isNaN(delay) && delay >= 0 ? delay : undefined,
  2546.       hosts: collectRules(),
  2547.       scale: !isNaN(scale) ? Math.max(1, scale) : undefined,
  2548.       scales: UI.scales.value
  2549.         .trim()
  2550.         .split(/[,;]*\s+/)
  2551.         .map(x => x.replace(',', '.'))
  2552.         .filter(x => !isNaN(parseFloat(x))),
  2553.       start: UI.start.value,
  2554.       zoom: UI.zoom.value,
  2555.       zoomOut: UI.zoomOut.value,
  2556.     };
  2557.     for (const el of $$('[type="checkbox"]', root))
  2558.       data[el.id] = el.checked;
  2559.     if (clone)
  2560.       data = JSON.parse(JSON.stringify(data));
  2561.     return new Config({data, save});
  2562.   }
  2563.  
  2564.   function collectRules() {
  2565.     return [...UI.rules.children]
  2566.       .map(el => [el.value.trim(), el[RULE]])
  2567.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2568.       .map(([s, json]) => json || s)
  2569.       .filter(Boolean);
  2570.   }
  2571.  
  2572.   function exportSettings(e) {
  2573.     Events.drop(e);
  2574.     const txt = $create('textarea', {
  2575.       style: 'opacity:0; position:absolute',
  2576.       value: JSON.stringify(collectConfig(), null, '  '),
  2577.     });
  2578.     root.appendChild(txt);
  2579.     txt.select();
  2580.     txt.focus();
  2581.     document.execCommand('copy');
  2582.     e.target.focus();
  2583.     txt.remove();
  2584.     UI.exportNotification.hidden = false;
  2585.     setTimeout(() => (UI.exportNotification.hidden = true), 1000);
  2586.   }
  2587.  
  2588.   function importSettings(e) {
  2589.     Events.drop(e);
  2590.     const s = prompt('Paste settings:');
  2591.     if (s)
  2592.       init(new Config({data: s}));
  2593.   }
  2594.  
  2595.   function checkRule({target: el}) {
  2596.     let json, error;
  2597.     const prev = el.previousElementSibling;
  2598.     if (el.value) {
  2599.       json = Ruler.parse(el.value);
  2600.       error = json instanceof Error && (json.message || String(json));
  2601.       if (!prev)
  2602.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2603.     } else if (prev) {
  2604.       prev.focus();
  2605.       el.remove();
  2606.     }
  2607.     el[RULE] = !error && json;
  2608.     el.title = error || '';
  2609.     el.setCustomValidity(error || '');
  2610.   }
  2611.  
  2612.   function focusRule({type, target: el, relatedTarget: from}) {
  2613.     if (el === this)
  2614.       return;
  2615.     if (type === 'paste') {
  2616.       setTimeout(() => focusRule.call(this, {target: el}));
  2617.       return;
  2618.     }
  2619.     if (el[RULE])
  2620.       el.value = Ruler.format(el[RULE], {expand: true});
  2621.     const h = clamp(el.scrollHeight, 15, div.clientHeight / 4);
  2622.     if (h > el.offsetHeight)
  2623.       el.style.minHeight = h + 'px';
  2624.     if (!this.contains(from))
  2625.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2626.     if (from) {
  2627.       from.style.minHeight = '';
  2628.       if (from[RULE])
  2629.         from.value = Ruler.format(from[RULE]);
  2630.     }
  2631.   }
  2632.  
  2633.   function installRule(rule) {
  2634.     const inputs = UI.rules.children;
  2635.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2636.     if (!el) {
  2637.       el = inputs[0];
  2638.       el[RULE] = rule;
  2639.       el.value = Ruler.format(rule);
  2640.       el.hidden = false;
  2641.       const i = Math.max(0, collectRules().indexOf(rule));
  2642.       inputs[i].insertAdjacentElement('afterend', el);
  2643.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2644.     }
  2645.     const rect = el.getBoundingClientRect();
  2646.     if (rect.bottom < 0 ||
  2647.         rect.bottom > el.parentNode.offsetHeight)
  2648.       el.scrollIntoView();
  2649.     el.classList.add('highlight');
  2650.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2651.     el.focus();
  2652.   }
  2653.  
  2654.   function init(config) {
  2655.     closeSetup();
  2656.     div = $create('div', {
  2657.       id: SETUP_ID,
  2658.       // prevent the main page from interpreting key presses in inputs as hotkeys
  2659.       // which may happen since it sees only the outer <div> in the event |target|
  2660.       contentEditable: true,
  2661.     });
  2662.     root = div.attachShadow({mode: 'open'});
  2663.     root.innerHTML = `
  2664.       <style>
  2665.         :host {
  2666.           all: initial !important;
  2667.           position: fixed !important;
  2668.           z-index: 2147483647 !important;
  2669.           top: 20px !important;
  2670.           right: 20px !important;
  2671.           padding: 20px 30px !important;
  2672.           color: #000 !important;
  2673.           background: #eee !important;
  2674.           box-shadow: 5px 5px 25px 2px #000 !important;
  2675.           width: 500px !important;
  2676.           border: 1px solid black !important;
  2677.           display: flex !important;
  2678.           flex-direction: column !important;
  2679.         }
  2680.         main {
  2681.           font: 12px/15px sans-serif;
  2682.         }
  2683.         ul {
  2684.           max-height: calc(100vh - 200px);
  2685.           margin: 10px 0 15px 0;
  2686.           padding: 0;
  2687.           list-style: none;
  2688.         }
  2689.         li {
  2690.           margin: 0;
  2691.           padding: .25em 0;
  2692.         }
  2693.         li.options {
  2694.           display: flex;
  2695.           align-items: center;
  2696.           flex-wrap: wrap;
  2697.         }
  2698.         label {
  2699.           display: inline-flex;
  2700.           align-items: center;
  2701.         }
  2702.         label:not(:last-child) {
  2703.           margin-right: 1em;
  2704.         }
  2705.         label > :not(span) {
  2706.           margin-right: .25em;
  2707.         }
  2708.         label > :not(span):not(:first-child) {
  2709.           margin-left: .5em;
  2710.         }
  2711.         input:first-child {
  2712.           margin-left: 0;
  2713.         }
  2714.         input, select {
  2715.           min-height: 1.6em;
  2716.           box-sizing: border-box;
  2717.         }
  2718.         textarea {
  2719.           flex: 1;
  2720.           resize: vertical;
  2721.           margin: 1px 0;
  2722.           font: 11px/1.25 Consolas, monospace;
  2723.         }
  2724.         textarea:invalid {
  2725.           background-color: #f002;
  2726.           border-color: #800;
  2727.         }
  2728.         code {
  2729.           font-weight: bold;
  2730.         }
  2731.         a {
  2732.           text-decoration: none;
  2733.         }
  2734.         a:hover {
  2735.           text-decoration: underline;
  2736.         }
  2737.         button {
  2738.           padding: .2em 1em;
  2739.           margin: 0 1em;
  2740.         }
  2741.         .column {
  2742.           display: flex;
  2743.           flex-direction: column;
  2744.         }
  2745.         .highlight {
  2746.           animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  2747.           animation-fill-mode: both;
  2748.         }
  2749.         #rules textarea {
  2750.           word-break: break-all;
  2751.         }
  2752.         #x {
  2753.           position: absolute;
  2754.           top: 0;
  2755.           right: 0;
  2756.           padding: 4px 8px;
  2757.           cursor: pointer;
  2758.           user-select: none;
  2759.         }
  2760.         #x:hover {
  2761.           background-color: #8884;
  2762.         }
  2763.         @keyframes fade-in {
  2764.           from { background-color: deepskyblue }
  2765.           to {}
  2766.         }
  2767.         @media (prefers-color-scheme: dark) {
  2768.           :host {
  2769.             color: #aaa !important;
  2770.             background: #333 !important;
  2771.           }
  2772.           a {
  2773.             color: deepskyblue;
  2774.           }
  2775.           textarea, input, select {
  2776.             background: #111;
  2777.             color: #BBB;
  2778.             border-color: #555;
  2779.           }
  2780.           input[type="checkbox"] {
  2781.             filter: invert(1);
  2782.           }
  2783.         }
  2784.       </style>
  2785.       <main>
  2786.         <a href="${MPIV_BASE_URL}">${GM_info.script.name}</a>
  2787.         <div id="x">x</div>
  2788.         <ul class="column">
  2789.           <li class="options">
  2790.             <label>
  2791.               <span>Popup:</span>
  2792.               <select id="start">
  2793.                 <option value="auto">automatically
  2794.                 <option value="context">right click or ctrl
  2795.                 <option value="ctrl">ctrl
  2796.               </select>
  2797.             </label>
  2798.             <label>
  2799.               <span>after</span>
  2800.               <input id="delay" type="number" min="0" max="10000" step="50" style="width: 4em">
  2801.               <span>ms</span>
  2802.             </label>
  2803.             <label>
  2804.               <input type="checkbox" id="preload">
  2805.               <span>Start preloading immediately</span>
  2806.             </label>
  2807.           </li>
  2808.           <li class="options">
  2809.             <label>
  2810.               <span>Zoom:</span>
  2811.               <select id="zoom">
  2812.                 <option value="context">right click or shift
  2813.                 <option value="wheel">wheel up or shift
  2814.                 <option value="shift">shift
  2815.                 <option value="auto">automatically
  2816.               </select>
  2817.             </label>
  2818.             <label>
  2819.               <span>When zoomed out completely</span>
  2820.               <select id="zoomOut">
  2821.                 <option value="stay">stay in zoom mode
  2822.                 <option value="auto">stay if still hovered
  2823.                 <option value="close">close popup
  2824.               </select>
  2825.             </label>
  2826.           </li>
  2827.           <li class="options">
  2828.             <label>
  2829.               <span>Only show popup over scaled-down image when natural size is</span>
  2830.               <input id="scale" type="number" min="1" max="100" step=".05" style="width: 4em;">
  2831.               <span>times larger</span>
  2832.             </label>
  2833.           </li>
  2834.           <li class="options">
  2835.             <label>
  2836.               <span>Custom scale factors:</span>
  2837.               <input id="scales" style="width: 18em"
  2838.                      placeholder="${Config.DEFAULTS.scales.join(' ')}">
  2839.               <span title="${`
  2840.                 0 = fit to window
  2841.                 0! = same as 0 but also removes smaller values
  2842.                 * after value marks default zoom factor, example 1*
  2843.                 Values smaller than non-zoomed size are ignored.
  2844.               `.trim().replace(/\n\s+/g, '\n')}" style="cursor:help">(?)</span>
  2845.             </label>
  2846.           </li>
  2847.           <li class="options">
  2848.             <label><input type="checkbox" id="center"><span>Always centered</span></label>
  2849.             <label><input type="checkbox" id="imgtab"><span>Run in image tabs</span></label>
  2850.             <label title="Disable only if you spoof the HTTP headers yourself">
  2851.               <input type="checkbox" id="xhr">
  2852.               <span>Anti-hotlinking workaround</span>
  2853.             </label>
  2854.             <label>
  2855.               <input type="checkbox" id="globalStatus">
  2856.               <span>Expose status on &lt;html&gt; node (note: may cause noticeable slowdown)</small>
  2857.             </label>
  2858.           </li>
  2859.           <li>
  2860.             <div class="column">
  2861.               <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>
  2862.               <textarea id="css" spellcheck="false"></textarea>
  2863.             </div>
  2864.           </li>
  2865.           <li style="display: flex; justify-content: space-between;">
  2866.             <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  2867.             <div style="white-space: nowrap">
  2868.               To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  2869.               in "d" value, for example <code>"d": "!foo.com"</code>
  2870.             </div>
  2871.             <div>
  2872.               <input id="search" type="search" placeholder="Search"
  2873.                      style="width: 10em; margin-left: 1em">
  2874.             </div>
  2875.           </li>
  2876.           <li style="
  2877.             overflow-y: auto;
  2878.             margin-left: -3px;
  2879.             margin-right: -3px;
  2880.             padding-left: 3px;
  2881.             padding-right: 3px;
  2882.           ">
  2883.             <div id="rules" class="column">
  2884.               <textarea rows="1" spellcheck="false"></textarea>
  2885.             </div>
  2886.           </li>
  2887.           <li>
  2888.             <div hidden id="installLoading">
  2889.               Loading...
  2890.             </div>
  2891.             <div hidden id="installHint">
  2892.               Double-click the rule (or select and press Enter) to add it. Click OK when done.
  2893.             </div>
  2894.             <a href="${MPIV_BASE_URL}more_host_rules.html" id="install">
  2895.               Install rule from repository...</a>
  2896.           </li>
  2897.         </ul>
  2898.         <div style="text-align:center">
  2899.           <button id="ok" accesskey="s">Save</button>
  2900.           <button id="apply" accesskey="a">Apply</button>
  2901.           <button id="import" style="margin-right: 0">Import</button>
  2902.           <button id="export" style="margin-left: 0">Export</button>
  2903.           <button id="cancel">Cancel</button>
  2904.           <div id="exportNotification" hidden style="
  2905.             color: green;
  2906.             position: absolute;
  2907.             bottom: 2px;
  2908.             left: 0;
  2909.             right: 0;
  2910.             font-weight: bold;">Copied to clipboard.</div>
  2911.         </div>
  2912.       </main>
  2913.     `;
  2914.     // rules
  2915.     const rules = UI.rules;
  2916.     rules.addEventListener('input', checkRule);
  2917.     rules.addEventListener('focusin', focusRule);
  2918.     rules.addEventListener('paste', focusRule);
  2919.     blankRuleElement =
  2920.       setup.blankRuleElement =
  2921.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2922.     for (const rule of config.hosts || []) {
  2923.       const el = blankRuleElement.cloneNode();
  2924.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2925.       rules.appendChild(el);
  2926.       checkRule({target: el});
  2927.     }
  2928.     // search rules
  2929.     const search = UI.search;
  2930.     search.oninput = () => {
  2931.       setup.search = search.value;
  2932.       const s = search.value.toLowerCase();
  2933.       for (const el of rules.children)
  2934.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2935.     };
  2936.     search.value = setup.search || '';
  2937.     if (search.value)
  2938.       search.oninput();
  2939.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2940.     // which may happen since it sees only the outer <div> in the event |target|
  2941.     root.addEventListener('keydown', e =>
  2942.       !e.altKey && !e.ctrlKey && !e.metaKey && e.stopPropagation(), true);
  2943.     UI.apply.onclick = UI.cancel.onclick = UI.ok.onclick = UI.x.onclick = closeSetup;
  2944.     UI.css.value = config.css;
  2945.     UI.delay.value = config.delay;
  2946.     UI.export.onclick = exportSettings;
  2947.     UI.import.onclick = importSettings;
  2948.     UI.install.onclick = setupRuleInstaller;
  2949.     UI.scale.value = config.scale;
  2950.     UI.scales.value = config.scales.join(' ');
  2951.     UI.start.value = config.start;
  2952.     UI.start.onchange = function () {
  2953.       UI.delay.closest('label').hidden =
  2954.         UI.preload.closest('label').hidden =
  2955.           this.value !== 'auto';
  2956.     };
  2957.     UI.start.onchange();
  2958.     UI.xhr.onclick = ({target: el}) => el.checked || confirm(el.closest('[title]').title);
  2959.     UI.zoom.value = config.zoom;
  2960.     UI.zoomOut.value = config.zoomOut;
  2961.     for (const el of $$('[type="checkbox"]', root))
  2962.       el.checked = config[el.id];
  2963.     for (const el of $$('a[href^="http"]', root)) {
  2964.       el.target = '_blank';
  2965.       el.rel = 'noreferrer noopener external';
  2966.     }
  2967.     doc.body.appendChild(div);
  2968.     requestAnimationFrame(() => {
  2969.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, div.clientHeight / 4) + 'px';
  2970.     });
  2971.   }
  2972. }
  2973.  
  2974. async function setupRuleInstaller(e) {
  2975.   Events.drop(e);
  2976.   const parent = this.parentElement;
  2977.   parent.children.installLoading.hidden = false;
  2978.   this.remove();
  2979.   let rules;
  2980.  
  2981.   try {
  2982.     rules = extractRules((await Remoting.getDoc(this.href)).doc);
  2983.     const selector = $create('select', {
  2984.       size: 8,
  2985.       style: 'width: 100%',
  2986.       ondblclick: e => e.target !== selector && maybeSetup(e),
  2987.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  2988.     });
  2989.     selector.append(...rules.map(renderRule));
  2990.     selector.selectedIndex = findMatchingRuleIndex();
  2991.     // remove "name" since the installed rules don't need it
  2992.     for (const r of rules)
  2993.       delete r.name;
  2994.     parent.children.installLoading.remove();
  2995.     parent.children.installHint.hidden = false;
  2996.     parent.appendChild(selector);
  2997.   } catch (e) {
  2998.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  2999.   }
  3000.  
  3001.   function extractRules(doc) {
  3002.     const code = $('script', doc).textContent;
  3003.     // sort by name
  3004.     return JSON.parse(code.match(/var\s+rules\s*=\s*(\[.+]);?[\r\n]/)[1])
  3005.       .filter(r => !r.d || hostname.includes(r.d))
  3006.       .sort((a, b) =>
  3007.         (a = a.name.toLowerCase()) < (b = b.name.toLowerCase()) ? -1 :
  3008.           a > b ? 1 :
  3009.             0);
  3010.   }
  3011.  
  3012.   function findMatchingRuleIndex() {
  3013.     // get the core part of the current domain that's not "www", "m", etc.
  3014.     const h = hostname.split('.');
  3015.     const core = h[0] === 'www' || h.length > 2 && h[0].length === 1 ? h[1] : h[0];
  3016.     // find a rule matching the domain core
  3017.     return rules.findIndex(r =>
  3018.       r.name.toLowerCase().includes(core) ||
  3019.       r.d && hostname.includes(r.d));
  3020.   }
  3021.  
  3022.   function renderRule(r) {
  3023.     const {name, ...copy} = r;
  3024.     return $create('option', {
  3025.       textContent: name,
  3026.       title: Ruler.format(copy, {expand: true})
  3027.         .replace(/^{|\s*}$/g, '')
  3028.         .split('\n')
  3029.         .slice(0, 12)
  3030.         .map(renderTitleLine)
  3031.         .filter(Boolean)
  3032.         .join('\n'),
  3033.     });
  3034.   }
  3035.  
  3036.   function renderTitleLine(line, i, arr) {
  3037.     return (
  3038.       // show ... on 10th line if there are more lines
  3039.       i === 9 && arr.length > 10 ? '...' :
  3040.         i > 10 ? '' :
  3041.           // truncate to 100 chars
  3042.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3043.             // strip the leading space
  3044.             .replace(/^\s/, ''));
  3045.   }
  3046.  
  3047.   function maybeSetup(e) {
  3048.     if (!e.altKey && !e.ctrlKey && !e.shiftKey && !e.metaKey)
  3049.       setup({rule: rules[e.currentTarget.selectedIndex]});
  3050.   }
  3051. }
  3052.  
  3053. App.init();