☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

目前为 2020-03-01 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     1.1.0
  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 installableSites = ['greasyfork.org', 'w9p.co', 'github.com'];
  35. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  36. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  37.  
  38. const POSTMSG_PREFIX = GM_info.script.name + ':';
  39. const PREFIX = 'mpiv-';
  40. const STATUS_ATTR = `${PREFIX}status`;
  41. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  42. const PASSIVE = {passive: true};
  43. // time for volatile things to settle down meanwhile we postpone action
  44. // examples: loading image from cache, quickly moving mouse over one element to another
  45. const SETTLE_TIME = 50;
  46. // used to detect JS code in host rules
  47. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  48.  
  49. /** @type mpiv.Config */
  50. let cfg;
  51. /** @type mpiv.AppInfo */
  52. let ai = {rule: {}};
  53. /** @type Element */
  54. let elConfig;
  55.  
  56. const clamp = (v, min, max) => v < min ? min : v > max ? max : v;
  57. const compareNumbers = (a, b) => a - b;
  58. const dropEvent = e => (e.preventDefault(), e.stopPropagation());
  59. const ensureArray = v => Array.isArray(v) ? v : [v];
  60. const safeIncludes = (a, b) => typeof a === 'string' && a.includes(b);
  61. const sumProps = (...props) => props.reduce((sum, v) => sum + (parseFloat(v) || 0), 0);
  62. const tryCatch = function (fn, ...args) {
  63.   try {
  64.     return fn.apply(this, args);
  65.   } catch (e) {}
  66. };
  67.  
  68. const $ = (s, n = doc) => n.querySelector(s) || 0;
  69. const $$ = (s, n = doc) => n.querySelectorAll(s);
  70. const $create = (tag, props) => Object.assign(document.createElement(tag), props);
  71. const $many = (q, doc) => q && ensureArray(q).reduce((el, sel) => el || $(sel, doc), null);
  72. const $prop = (s, prop, n = doc) => (n.querySelector(s) || 0)[prop] || '';
  73. const $propUp = (n, prop) =>
  74.   (n = n.closest(`[${prop}]`)) && (prop.startsWith('data-') ? n.getAttribute(prop) : n[prop]) || '';
  75. const $remove = el => el && el.remove();
  76.  
  77. class App {
  78.  
  79.   static init() {
  80.     cfg = new Config({save: true});
  81.     App.isImageTab = doc.images.length === 1 &&
  82.                      doc.images[0].parentNode === doc.body &&
  83.                      !doc.links.length;
  84.     App.enabled = cfg.imgtab || !App.isImageTab;
  85.  
  86.     GM_registerMenuCommand('MPIV: configure', setup);
  87.     doc.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  88.  
  89.     if (isGoogleDomain && doc.getElementById('main'))
  90.       doc.getElementById('main').addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  91.  
  92.     if (installableSites.includes(hostname)) {
  93.       doc.addEventListener('click', e => {
  94.         if (hostname === 'github.com' && !location.pathname.startsWith('/tophf/mpiv/')) return;
  95.         const el = e.target.closest('blockquote, code, pre');
  96.         const text = el && el.textContent.trim();
  97.         let rule;
  98.         if (text && e.button === 0 &&
  99.             /^\s*{\s*"\w+"\s*:[\s\S]+}\s*$/.test(text) &&
  100.             (rule = tryCatch(JSON.parse, text))) {
  101.           setup({rule});
  102.           dropEvent(e);
  103.         }
  104.       });
  105.     }
  106.  
  107.     window.addEventListener('message', App.onMessageParent);
  108.   }
  109.  
  110.   /** @param {MessageEvent} e */
  111.   static onMessageParent(e) {
  112.     if (typeof e.data === 'string' && e.data.startsWith(POSTMSG_PREFIX)) {
  113.       for (const el of $$('iframe, frame')) {
  114.         if (el.contentWindow === e.source) {
  115.           const r = el.getBoundingClientRect();
  116.           const w = clamp(r.width, 0, innerWidth - r.left);
  117.           const h = clamp(r.height, 0, innerHeight - r.top);
  118.           e.source.postMessage(`${POSTMSG_PREFIX}${w}:${h}`, '*');
  119.         }
  120.       }
  121.     }
  122.   }
  123.  
  124.   /** @param {MessageEvent} e */
  125.   static onMessageChild(e) {
  126.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(POSTMSG_PREFIX)) {
  127.       const [width, height] = e.data.slice(POSTMSG_PREFIX.length).split(':').map(parseFloat);
  128.       if (width && height) {
  129.         ai.view = {width, height};
  130.         window.removeEventListener('message', App.onMessageChild);
  131.       }
  132.     }
  133.   }
  134.  
  135.   static activate(info, event) {
  136.     const {match, node, rule, url} = info;
  137.     const force = event.ctrlKey;
  138.     const scale = !force && Util.findScale(url, node.parentNode);
  139.     if (elConfig) console.info(Object.assign({node, rule, url, match}, scale && {scale}));
  140.     if (scale && scale < cfg.scale)
  141.       return;
  142.     if (ai.node)
  143.       App.deactivate();
  144.     ai = info;
  145.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  146.     ai.view = {
  147.       width: view.clientWidth,
  148.       height: view.clientHeight,
  149.     };
  150.     if (window !== top) {
  151.       window.addEventListener('message', App.onMessageChild);
  152.       parent.postMessage(POSTMSG_PREFIX + 'getDimensions', '*');
  153.     }
  154.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  155.     Util.suppressHoverTooltip();
  156.     App.setListeners();
  157.     App.updateMouse(event);
  158.     if (force) {
  159.       Popup.start();
  160.     } else if (cfg.start === 'auto' && !rule.manual) {
  161.       Popup.schedule();
  162.     } else {
  163.       App.setStatus('ready');
  164.     }
  165.   }
  166.  
  167.   static checkProgress({start} = {}) {
  168.     const p = ai.popup;
  169.     if (p) {
  170.       ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && 800;
  171.       ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && 1200;
  172.       if (ai.nheight) {
  173.         App.updateProgress();
  174.         return;
  175.       }
  176.     }
  177.     if (start)
  178.       ai.timerProgress = setInterval(App.checkProgress, 150);
  179.   }
  180.  
  181.   static deactivate({wait} = {}) {
  182.     App.stopTimers();
  183.     if (ai.req)
  184.       tryCatch.call(ai.req, ai.req.abort);
  185.     if (ai.tooltip)
  186.       ai.tooltip.node.title = ai.tooltip.text;
  187.     App.setStatus(false);
  188.     App.setBar(false);
  189.     App.setListeners(false);
  190.     Popup.destroy();
  191.     if (wait) {
  192.       App.enabled = false;
  193.       setTimeout(App.enable, 200);
  194.     }
  195.     ai = {rule: {}};
  196.   }
  197.  
  198.   static enable() {
  199.     App.enabled = true;
  200.   }
  201.  
  202.   static handleError(e, rule = ai.rule) {
  203.     const fe = Util.formatError(e, rule);
  204.     if (!rule || !ai.urls || !ai.urls.length)
  205.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  206.     if (cfg.xhr && !ai.xhr && isGoogleImages) {
  207.       ai.xhr = true;
  208.       Popup.startSingle();
  209.     } else if (ai.urls && ai.urls.length) {
  210.       ai.url = ai.urls.shift();
  211.       if (ai.url) {
  212.         App.stopTimers();
  213.         Popup.startSingle();
  214.       } else {
  215.         App.deactivate();
  216.       }
  217.     } else if (ai.node) {
  218.       App.setStatus('error');
  219.       App.setBar(fe.message, 'error');
  220.     }
  221.   }
  222.  
  223.   static setBar(label, className) {
  224.     let b = ai.bar;
  225.     if (typeof label !== 'string') {
  226.       $remove(b);
  227.       ai.bar = null;
  228.       return;
  229.     }
  230.     if (!b)
  231.       b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  232.     App.updateStyles();
  233.     App.updateTitle();
  234.     App.updateBar();
  235.     b.innerHTML = label;
  236.     if (!b.parentNode) {
  237.       doc.body.appendChild(b);
  238.       Util.forceLayout(b);
  239.     }
  240.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  241.   }
  242.  
  243.   static setListeners(enable = true) {
  244.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  245.     const passive = enable ? PASSIVE : undefined;
  246.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  247.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  248.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  249.     onOff.call(doc, 'contextmenu', Events.onContext);
  250.     onOff.call(doc, 'keydown', Events.onKeyDown);
  251.     onOff.call(doc, 'keyup', Events.onKeyUp);
  252.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  253.   }
  254.  
  255.   static setStatus(status) {
  256.     if (!status && !cfg.globalStatus) {
  257.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  258.       return;
  259.     }
  260.     const prefix = cfg.globalStatus ? PREFIX : '';
  261.     const action = status && /^[+-]/.test(status) && status[0];
  262.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  263.     const el = cfg.globalStatus ? doc.documentElement :
  264.       name === 'edge' ? ai.popup :
  265.         ai.node;
  266.     if (!el) return;
  267.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  268.     const oldValue = (el.getAttribute(attr) || '').trim();
  269.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  270.     switch (action) {
  271.       case '-':
  272.         cls.delete(name);
  273.         break;
  274.       case false:
  275.         for (const c of cls)
  276.           if (c.startsWith(prefix) && c !== name)
  277.             cls.delete(c);
  278.         // fallthrough to +
  279.       case '+':
  280.         if (name)
  281.           cls.add(name);
  282.         break;
  283.     }
  284.     const newValue = [...cls].join(' ');
  285.     if (newValue !== oldValue)
  286.       el.setAttribute(attr, newValue);
  287.   }
  288.  
  289.   static setStatusLoading(force) {
  290.     if (!force) {
  291.       clearTimeout(ai.timerStatus);
  292.       ai.timerStatus = setTimeout(App.setStatusLoading, SETTLE_TIME, true);
  293.     } else if (!ai.popupLoaded) {
  294.       App.setStatus('+loading');
  295.     }
  296.   }
  297.  
  298.   static stopTimers() {
  299.     clearTimeout(ai.timer);
  300.     clearTimeout(ai.timerBar);
  301.     clearTimeout(ai.timerStatus);
  302.     clearInterval(ai.timerProgress);
  303.   }
  304.  
  305.   static updateBar() {
  306.     clearTimeout(ai.timerBar);
  307.     ai.bar.style.removeProperty('opacity');
  308.     ai.timerBar = setTimeout(() => ai.bar && ai.bar.style.setProperty('opacity', 0), 3000);
  309.   }
  310.  
  311.   static updateCaption(text, doc = document) {
  312.     switch (typeof ai.rule.c) {
  313.       case 'function':
  314.         // not specifying as a parameter's default value to get the html only when needed
  315.         if (text === undefined)
  316.           text = doc.documentElement.outerHTML;
  317.         ai.caption = ai.rule.c(text, doc, ai.node, ai.rule);
  318.         break;
  319.       case 'string': {
  320.         const el = $many(ai.rule.c, doc);
  321.         ai.caption = !el ? '' :
  322.           el.getAttribute('content') ||
  323.           el.getAttribute('title') ||
  324.           el.textContent;
  325.         break;
  326.       }
  327.       default:
  328.         ai.caption = (ai.tooltip || 0).text || ai.node.alt || $propUp(ai.node, 'title') ||
  329.                      Remoting.getFileName(ai.node.src || $propUp(ai.node, 'href'));
  330.     }
  331.   }
  332.  
  333.   static updateFileInfo() {
  334.     const gi = ai.gItems;
  335.     if (gi) {
  336.       const item = gi[ai.gIndex];
  337.       let c = gi.length > 1 ? '[' + (ai.gIndex + 1) + '/' + gi.length + '] ' : '';
  338.       if (ai.gIndex === 0 && gi.title && (!item.desc || !safeIncludes(item.desc, gi.title)))
  339.         c += gi.title + (item.desc ? ' - ' : '');
  340.       if (item.desc)
  341.         c += item.desc;
  342.       App.setBar(c.trim() || ' ', 'gallery', true);
  343.     } else if ('caption' in ai) {
  344.       App.setBar(ai.caption, 'caption');
  345.     } else if (ai.tooltip) {
  346.       App.setBar(ai.tooltip.text, 'tooltip');
  347.     } else {
  348.       App.setBar(' ', 'info');
  349.     }
  350.   }
  351.  
  352.   static updateMouse(e) {
  353.     const cx = ai.clientX = e.clientX;
  354.     const cy = ai.clientY = e.clientY;
  355.     const r = ai.rect;
  356.     if (r)
  357.       ai.isOverRect =
  358.         cx > r.left - 2 && cx < r.right + 2 &&
  359.         cy > r.top - 2 && cy < r.bottom + 2;
  360.   }
  361.  
  362.   static updateProgress() {
  363.     App.stopTimers();
  364.     let wait;
  365.     if (ai.preloadStart && (wait = ai.preloadStart + cfg.delay - Date.now()) > 0) {
  366.       ai.timer = setTimeout(App.checkProgress, wait);
  367.       return;
  368.     }
  369.     if ((ai.urls || 0).length && Math.max(ai.nheight, ai.nwidth) < 130) {
  370.       App.handleError({type: 'error'});
  371.       return;
  372.     }
  373.     App.setStatus(false);
  374.     Util.forceLayout(ai.popup);
  375.     ai.popup.className = `${PREFIX}show`;
  376.     App.updateSpacing();
  377.     App.updateScales();
  378.     if (!(cfg.imgtab && App.isImageTab || cfg.zoom === 'auto') ||
  379.         App.zoomToggle({keepScale: true}) === undefined)
  380.       Popup.move();
  381.     App.updateTitle();
  382.     if (!ai.bar)
  383.       App.updateFileInfo();
  384.     ai.large = ai.nwidth > ai.popup.clientWidth + ai.mbw ||
  385.                ai.nheight > ai.popup.clientHeight + ai.mbh;
  386.     if (ai.large)
  387.       App.setStatus('large');
  388.   }
  389.  
  390.   static updateScales() {
  391.     const fit = Math.min(
  392.       (ai.view.width - ai.mbw - ai.outline * 2) / ai.nwidth,
  393.       (ai.view.height - ai.mbh - ai.outline * 2) / ai.nheight);
  394.     const isCustom = !cfg.fit;
  395.     const src = (isCustom && cfg.scales.length ? cfg : Config.DEFAULTS).scales;
  396.     const dst = isCustom ? [] : [fit];
  397.     let cutoff = Math.min(1, fit);
  398.     ai.scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  399.     ai.scale = cfg.zoom === 'auto' ? ai.scaleZoom : cutoff;
  400.     for (const scale of src) {
  401.       const val = parseFloat(scale) || fit;
  402.       dst.push(val);
  403.       if (isCustom && typeof scale === 'string') {
  404.         if (scale.includes('!')) cutoff = val;
  405.         if (scale.includes('*')) ai.scaleZoom = val;
  406.       }
  407.     }
  408.     ai.scales = dst.sort(compareNumbers).filter(Util.scaleCut, cutoff);
  409.   }
  410.  
  411.   static updateSpacing() {
  412.     const s = getComputedStyle(ai.popup);
  413.     ai.outline = sumProps(s.outlineOffset, s.outlineWidth);
  414.     ai.pw = sumProps(s.paddingLeft, s.paddingRight);
  415.     ai.ph = sumProps(s.paddingTop, s.paddingBottom);
  416.     ai.mbw = sumProps(s.marginLeft, s.marginRight, s.borderLeftWidth, s.borderRightWidth);
  417.     ai.mbh = sumProps(s.marginTop, s.marginBottom, s.borderTopWidth, s.borderBottomWidth);
  418.   }
  419.  
  420.   static updateStyles() {
  421.     let cssApp = App.globalStyle;
  422.     if (!cssApp) {
  423.       cssApp = App.globalStyle = /*language=CSS*/ (String.raw`
  424. #\mpiv-bar {
  425.   position: fixed;
  426.   z-index: 2147483647;
  427.   top: 0;
  428.   left: 0;
  429.   right: 0;
  430.   opacity: 0;
  431.   transition: opacity 1s ease .25s;
  432.   text-align: center;
  433.   font-family: sans-serif;
  434.   font-size: 15px;
  435.   font-weight: bold;
  436.   background: #0005;
  437.   color: white;
  438.   padding: 4px 10px;
  439.   text-shadow: .5px .5px 2px #000;
  440. }
  441. #\mpiv-bar.\mpiv-show {
  442.   opacity: 1;
  443. }
  444. #\mpiv-bar[data-zoom]::after {
  445.   content: " (" attr(data-zoom) ")";
  446.   opacity: .8;
  447. }
  448. #\mpiv-popup.\mpiv-show {
  449.   display: inline;
  450. }
  451. #\mpiv-popup {
  452.   display: none;
  453.   border: none !important;
  454.   box-sizing: content-box !important;
  455.   position: fixed !important;
  456.   z-index: 2147483647 !important;
  457.   margin: 0 !important;
  458.   top: 0 !important;
  459.   left: 0 !important;
  460.   width: auto !important;
  461.   height: auto !important;
  462.   transform-origin: top left !important;
  463.   max-width: none !important;
  464.   max-height: none !important;
  465.   cursor: none;
  466.   animation: .2s \mpiv-fadein both;
  467. }
  468. #\mpiv-popup.\mpiv-show {
  469.   box-shadow: 6px 6px 30px transparent;
  470.   transition: box-shadow .25s, background-color .25s;
  471. }
  472. #\mpiv-popup.\mpiv-show[loaded] {
  473.   box-shadow: 6px 6px 30px black;
  474.   background-color: white;
  475. }
  476. #\mpiv-popup.\mpiv-zoom-max {
  477.   image-rendering: pixelated;
  478. }
  479. @keyframes \mpiv-fadein {
  480.   from { opacity: 0; }
  481.   to { opacity: 1; }
  482. }
  483. ` + (cfg.globalStatus ? String.raw`
  484. .\mpiv-loading:not(.\mpiv-preloading) * {
  485.   cursor: wait !important;
  486. }
  487. .\mpiv-edge #\mpiv-popup {
  488.   cursor: default;
  489. }
  490. .\mpiv-error * {
  491.   cursor: not-allowed !important;
  492. }
  493. .\mpiv-ready *, .\mpiv-large * {
  494.   cursor: zoom-in !important;
  495. }
  496. .\mpiv-shift * {
  497.   cursor: default !important;
  498. }
  499. ` : String.raw`
  500. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]) {
  501.   cursor: wait !important;
  502. }
  503. #\mpiv-popup[\mpiv-status~="edge"] {
  504.   cursor: default !important;
  505. }
  506. [\mpiv-status~="error"] {
  507.   cursor: not-allowed !important;
  508. }
  509. [\mpiv-status~="ready"],
  510. [\mpiv-status~="large"] {
  511.   cursor: zoom-in !important;
  512. }
  513. [\mpiv-status~="shift"] {
  514.   cursor: default !important;
  515. }
  516. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  517.     }
  518.     const {css} = cfg;
  519.     Util.addStyle('global', cssApp + (css.includes('{') ? css : `#${PREFIX}-popup {${css}}`));
  520.     Util.addStyle('rule', ai.rule.css || '');
  521.   }
  522.  
  523.   static updateTitle() {
  524.     if (!ai.bar) return;
  525.     const zoom = ai.nwidth && `${
  526.       Math.round(ai.scale * 100)
  527.     }%, ${
  528.       ai.nwidth
  529.     } x ${
  530.       ai.nheight
  531.     } px, ${
  532.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  533.     } MP`.replace(/\x20/g, '\xA0');
  534.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  535.       if (zoom) ai.bar.dataset.zoom = zoom;
  536.       else delete ai.bar.dataset.zoom;
  537.       App.updateBar();
  538.     }
  539.   }
  540.  
  541.   static zoomToggle({keepScale} = {}) {
  542.     const p = ai.popup;
  543.     if (!p || !ai.scales || ai.scales.length < 2)
  544.       return;
  545.     ai.zoom = !ai.zoom;
  546.     ai.zoomed = true;
  547.     ai.scale = ai.zoom && Util.scaleNextToZoom(keepScale) || ai.scales[0];
  548.     if (ai.zooming)
  549.       p.classList.add(`${PREFIX}zooming`);
  550.     Popup.move();
  551.     App.updateTitle();
  552.     App.setStatus(ai.zoom ? 'zoom' : false);
  553.     if (!ai.zoom)
  554.       App.updateFileInfo();
  555.     return ai.zoom;
  556.   }
  557.  
  558.   static zoomInOut(dir) {
  559.     const i = Util.findScaleIndex(dir);
  560.     const n = ai.scales.length;
  561.     if (i >= 0 && i < n)
  562.       ai.scale = ai.scales[i];
  563.     if (i <= 0 && cfg.zoomOut !== 'stay') {
  564.       if ((cfg.zoomOut === 'close' || !ai.isOverRect) && (!ai.gItems || ai.gItems.length < 2)) {
  565.         App.deactivate({wait: true});
  566.         return;
  567.       }
  568.       ai.zoom = cfg.zoomOut === 'auto';
  569.       ai.zoomed = false;
  570.       App.updateFileInfo();
  571.     } else {
  572.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  573.     }
  574.     if (ai.zooming)
  575.       ai.popup.classList.add(`${PREFIX}zooming`);
  576.     Popup.move();
  577.     App.updateTitle();
  578.   }
  579. }
  580.  
  581. class Config {
  582.   constructor({data: c = GM_getValue('cfg'), save}) {
  583.     if (typeof c === 'string')
  584.       c = tryCatch(JSON.parse, c);
  585.     if (typeof c !== 'object' || !c)
  586.       c = {};
  587.     const {DEFAULTS} = Config;
  588.     if (c.version !== DEFAULTS.version) {
  589.       if (typeof c.hosts === 'string')
  590.         c.hosts = c.hosts.split('\n')
  591.           .map(s => tryCatch(JSON.parse, s) || s)
  592.           .filter(Boolean);
  593.       if (c.close === true || c.close === false)
  594.         c.zoomOut = c.close ? 'auto' : 'stay';
  595.       for (const key in DEFAULTS)
  596.         if (typeof c[key] !== typeof DEFAULTS[key])
  597.           c[key] = DEFAULTS[key];
  598.       if (c.version === 3 && c.scales[0] === 0)
  599.         c.scales[0] = '0!';
  600.       for (const key in c)
  601.         if (!(key in DEFAULTS))
  602.           delete c[key];
  603.       c.version = DEFAULTS.version;
  604.       if (save)
  605.         GM_setValue('cfg', JSON.stringify(c));
  606.     }
  607.     if (cfg && (
  608.       cfg.css !== c.css ||
  609.       cfg.globalStatus !== c.globalStatus
  610.     )) {
  611.       App.globalStyle = '';
  612.     }
  613.     if (!Array.isArray(c.scales)) c.scales = [];
  614.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  615.     c.fit = ['all', 'large', 'no'].includes(c.fit) ? c.fit :
  616.       !c.scales.length || `${c.scales}` === `${Config.DEFAULTS.scales}` ? 'large' :
  617.         '';
  618.     Object.assign(this, c);
  619.   }
  620. }
  621.  
  622. /** @type mpiv.Config */
  623. Config.DEFAULTS = Object.assign(Object.create(null), {
  624.   center: false,
  625.   css: '',
  626.   delay: 500,
  627.   fit: '',
  628.   globalStatus: false,
  629.   // prefer ' inside rules because " will be displayed as \"
  630.   // example: "img[src*='icon']"
  631.   hosts: [{
  632.     name: 'No popup for YouTube thumbnails',
  633.     d: 'www.youtube.com',
  634.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  635.     s: '',
  636.   }, {
  637.     name: 'No popup for SVG/PNG icons',
  638.     d: '',
  639.     e: "img[src*='icon']",
  640.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  641.     s: '',
  642.   }],
  643.   imgtab: false,
  644.   preload: false,
  645.   scale: 1.25,
  646.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  647.   start: 'auto',
  648.   version: 6,
  649.   xhr: true,
  650.   zoom: 'context',
  651.   zoomOut: 'auto',
  652. });
  653.  
  654. class Ruler {
  655. /*
  656.  'u' works only with URLs so it's ignored if 'html' is true
  657.    ||some.domain = matches some.domain, anything.some.domain, etc.
  658.    |foo = url or text must start with foo
  659.    ^ = separator like / or ? or : but not a letter/number, not %._-
  660.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  661.  'r' is checked only if 'u' matches first
  662. */
  663.   static init() {
  664.     const errors = new Map();
  665.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  666.     for (const rule of errors.keys())
  667.       App.handleError('Invalid custom host rule:', rule);
  668.  
  669.     // rules that disable previewing
  670.     const disablers = [
  671.       dotDomain.endsWith('.stackoverflow.com') && {
  672.         e: '.post-tag, .post-tag img',
  673.         s: '',
  674.       },
  675.       {
  676.         u: '||disqus.com/',
  677.         s: '',
  678.       },
  679.     ];
  680.  
  681.     // optimization: a rule is created only when on domain
  682.     const perDomain = [
  683.       hostname.includes('startpage') && {
  684.         r: /\boiu=(.+)/,
  685.         s: '$1',
  686.         follow: true,
  687.       },
  688.       dotDomain.endsWith('.4chan.org') && {
  689.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  690.         q: '.op .fileText a',
  691.         css: '#post-preview{display:none}',
  692.       },
  693.       hostname.includes('amazon.') && {
  694.         r: /.+?images\/I\/.+?\./,
  695.         s: m => {
  696.           const uh = doc.getElementById('universal-hover');
  697.           return uh ? '' : m[0] + 'jpg';
  698.         },
  699.         css: '#zoomWindow{display:none!important;}',
  700.       },
  701.       dotDomain.endsWith('.bing.com') && {
  702.         e: 'a[m*="murl"]',
  703.         r: /murl&quot;:&quot;(.+?)&quot;/,
  704.         s: '$1',
  705.         html: true,
  706.       },
  707.       dotDomain.endsWith('.deviantart.com') && {
  708.         e: '[data-super-full-img] *, img[src*="/th/"]',
  709.         s: (m, node) =>
  710.           $propUp(node, 'data-super-full-img') ||
  711.           (node = node.dataset.embedId && node.nextElementSibling) &&
  712.           node.dataset.embedId && node.src,
  713.       },
  714.       dotDomain.endsWith('.deviantart.com') && {
  715.         e: '.dev-view-deviation img',
  716.         s: () => [
  717.           $('.dev-page-download').href,
  718.           $('.dev-content-full').src,
  719.         ].filter(Boolean),
  720.       },
  721.       dotDomain.endsWith('.deviantart.com') && {
  722.         u: ',strp/',
  723.         s: '/\\/v1\\/.*//',
  724.       },
  725.       dotDomain.endsWith('.dropbox.com') && {
  726.         r: /(.+?&size_mode)=\d+(.*)/,
  727.         s: '$1=5$2',
  728.       },
  729.       dotDomain.endsWith('.facebook.com') && {
  730.         e: 'a[href*="ref=hovercard"]',
  731.         s: (m, node) =>
  732.           'https://www.facebook.com/photo.php?fbid=' +
  733.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  734.         follow: true,
  735.       },
  736.       dotDomain.endsWith('.facebook.com') && {
  737.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  738.         s: (m, node) =>
  739.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  740.             decodeURIComponent(m[4]),
  741.         html: true,
  742.         follow: true,
  743.       },
  744.       dotDomain.endsWith('.flickr.com') &&
  745.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  746.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  747.         s: m => `https://www.flickr.com/services/rest/?${
  748.           new URLSearchParams({
  749.             photo_id: m[1],
  750.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  751.             method: 'flickr.photos.getSizes',
  752.             format: 'json',
  753.             nojsoncallback: 1,
  754.           }).toString()}`,
  755.         q: text => JSON.parse(text).sizes.size.pop().source,
  756.       },
  757.       dotDomain.endsWith('.github.com') && {
  758.         r: new RegExp([
  759.           /(avatars.+?&s=)\d+/,
  760.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  761.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  762.         ].map(rx => rx.source).join('|')),
  763.         s: m => `https://${
  764.           m[1] ? `${m[1]}460` :
  765.             m[2] ? `${m[2]}usercontent${m[3]}` :
  766.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  767.         }`,
  768.       },
  769.       isGoogleImages && {
  770.         e: 'a',
  771.         r: /imgres\?imgurl=([^&]+)/,
  772.         s: '$1',
  773.       },
  774.       isGoogleImages && {
  775.         e: '[data-tbnid] a',
  776.         s: (m, node, rule) => {
  777.           const id = $propUp(node, 'data-tbnid');
  778.           for (const {text} of $$('script', doc)) {
  779.             let i = text.indexOf(id);
  780.             if (i < 0) continue;
  781.             i = text.indexOf('[', i + id.length + 9) + 2;
  782.             const url = text.slice(i, text.indexOf('"', i + 1));
  783.             if (!url.startsWith('http')) continue;
  784.             rule.xhr = !url.startsWith(location.protocol);
  785.             return url;
  786.           }
  787.         },
  788.       },
  789.       dotDomain.endsWith('.instagram.com') && {
  790.         e: [
  791.           'a[href*="/p/"]',
  792.           'a[role="button"][data-reactid*="scontent-"]',
  793.           'article div',
  794.           'article div div img',
  795.         ],
  796.         s: (m, node, rule) => {
  797.           const {a = false, data = false, src} = rule._getData(node);
  798.           rule.q = data.is_video && !data.video_url && 'meta[property="og:video"]';
  799.           rule.g = a && $('[class*="Carousel"]', a) && rule._g;
  800.           rule.follow = !data && !rule.g;
  801.           return (
  802.             !a && !src ? false :
  803.               !data || rule.q ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  804.                 data.video_url || data.display_url);
  805.         },
  806.         c: (html, doc, node, rule) => {
  807.           const {data, img} = rule._getData(node);
  808.           return tryCatch(rule._getCaption, data) || img && img.alt || '';
  809.         },
  810.         anonymous: true,
  811.         follow: true,
  812.         _g(text, doc, url, m, rule) {
  813.           const media = JSON.parse(text).graphql.shortcode_media;
  814.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  815.             url: e.node.video_url || e.node.display_url,
  816.             desc: e.node.accessibility_caption || '',
  817.           }));
  818.           items.title = tryCatch(rule._getCaption, media) || '';
  819.           return items;
  820.         },
  821.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  822.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  823.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  824.         _getData(node) {
  825.           if (location.pathname.startsWith('/p/')) {
  826.             const img = $('img[srcset], video', node.parentNode);
  827.             if (img && parseFloat(img.sizes) > 900)
  828.               return {img, src: (img.srcset || img.currentSrc).split(',').pop().split(' ')[0]};
  829.           }
  830.           const n = node.closest('a[href*="/p/"], article');
  831.           const a = n && (n.tagName === 'A' ? n : $('a[href*="/p/"]', n));
  832.           const data = a && tryCatch(this._getEdge, a.pathname.split('/')[2]);
  833.           return {a, data};
  834.         },
  835.       },
  836.       ...dotDomain.endsWith('.reddit.com') && [{
  837.         u: '||i.reddituploads.com/',
  838.       }, {
  839.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  840.         s: (m, node) => $propUp(node, 'data-url'),
  841.       }, {
  842.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  843.         s: 'https://i$1',
  844.       }] || [],
  845.       dotDomain.endsWith('.tumblr.com') && {
  846.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  847.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  848.         follow: true,
  849.       },
  850.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  851.         e: 'a.media-item, a.js-media-image-link',
  852.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  853.         follow: true,
  854.       },
  855.       dotDomain.endsWith('.twitter.com') && {
  856.         e: '.grid-tweet > .media-overlay',
  857.         s: (m, node) => node.previousElementSibling.src,
  858.         follow: true,
  859.       },
  860.     ];
  861.  
  862.     const main = [
  863.       {
  864.         r: /[/?=](https?[^&]+)/,
  865.         s: '$1',
  866.         follow: true,
  867.       },
  868.       {
  869.         u: [
  870.           '||500px.com/photo/',
  871.           '||cl.ly/',
  872.           '||cweb-pix.com/',
  873.           '||ibb.co/',
  874.           '||imgcredit.xyz/image/',
  875.         ],
  876.         r: /\.\w+\/.+/,
  877.         q: 'meta[property="og:image"]',
  878.       },
  879.       {
  880.         u: 'attachment.php',
  881.         r: /attachment\.php.+attachmentid/,
  882.       },
  883.       {
  884.         u: '||abload.de/image',
  885.         q: '#image',
  886.       },
  887.       {
  888.         u: '||deviantart.com/art/',
  889.         s: (m, node) =>
  890.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  891.             '' :
  892.             m.input,
  893.         q: [
  894.           '#download-button[href*=".jpg"]',
  895.           '#download-button[href*=".jpeg"]',
  896.           '#download-button[href*=".gif"]',
  897.           '#download-button[href*=".png"]',
  898.           '#gmi-ResViewSizer_fullimg',
  899.           'img.dev-content-full',
  900.         ],
  901.       },
  902.       {
  903.         u: '||dropbox.com/s',
  904.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  905.         q: (text, doc) =>
  906.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  907.       },
  908.       {
  909.         r: /[./]ebay\.[^/]+\/itm\//,
  910.         q: text =>
  911.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  912.             .replace(/~~60_\d+/, '~~60_57'),
  913.       },
  914.       {
  915.         u: '||i.ebayimg.com/',
  916.         s: (m, node) =>
  917.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  918.             m.input.replace(/~~60_\d+/, '~~60_57'),
  919.       },
  920.       {
  921.         u: [
  922.           '||fastpic.ru/big',
  923.           '||fastpic.ru/thumb',
  924.         ],
  925.         r: /\/\/(?:i(\d+)\.)?([^/]+\/)(big|thumb|view)\/([^.]+?)\.(\w+)/,
  926.         s: (m, node, rule) => {
  927.           const a = node.closest('[href*="fastpic.ru"]');
  928.           const am = a && rule.r.exec(decodeURIComponent(a.href)) || [];
  929.           const p = a && am[4].split('/');
  930.           return `https://i${am[1] || m[1] || am[3] === 'view' && p[0]}.${m[2]}big/${
  931.             am[3] === 'big' ? am[4] : m[4]}.${am[5] || m[5]}?noht=1`;
  932.         },
  933.         xhr: () => 'https://fastpic.ru',
  934.       },
  935.       {
  936.         u: '||fastpic.ru/view/',
  937.         q: 'img[src*="/big/"]',
  938.         xhr: true,
  939.       },
  940.       {
  941.         u: '||facebook.com/',
  942.         r: /photo\.php|[^/]+\/photos\//,
  943.         s: (m, node) =>
  944.           node.id === 'fbPhotoImage' ? false :
  945.             /gradient\.png$/.test(m.input) ? '' :
  946.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  947.         q: [
  948.           'div + span > a:first-child:not([href*="tag_faces"])',
  949.           'div + span > a[href*="tag_faces"] ~ a',
  950.         ],
  951.         rect: '#fbProfileCover',
  952.       },
  953.       {
  954.         u: '||fbcdn.',
  955.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  956.         s: m =>
  957.           dotDomain.endsWith('.facebook.com') &&
  958.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  959.           false,
  960.         manual: true,
  961.       },
  962.       {
  963.         u: ['||fbcdn-', 'fbcdn.net/'],
  964.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  965.         s: (m, node) => {
  966.           if (node.id === 'fbPhotoImage') {
  967.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  968.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  969.           }
  970.           if (m[4])
  971.             return false;
  972.           const pn = node.parentNode;
  973.           if (pn.outerHTML.includes('/hovercard/'))
  974.             return '';
  975.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  976.             return false;
  977.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  978.         },
  979.         rect: '.photoWrap',
  980.       },
  981.       {
  982.         u: '||flickr.com/photos/',
  983.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  984.         s: m =>
  985.           m.input.indexOf('/sizes/') < 0 ?
  986.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  987.             false,
  988.         q: (text, doc) => {
  989.           const links = $$('.sizes-list a', doc);
  990.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  991.         },
  992.         follow: true,
  993.       },
  994.       {
  995.         u: '||flickr.com/photos/',
  996.         r: /\/sizes\//,
  997.         q: '#allsizes-photo > img',
  998.       },
  999.       {
  1000.         u: '||gfycat.com/',
  1001.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1002.         s: 'https://$1$3',
  1003.         q: [
  1004.           'meta[content$=".webm"]',
  1005.           '#webmsource',
  1006.           'source[src$=".webm"]',
  1007.         ],
  1008.       },
  1009.       {
  1010.         u: [
  1011.           '||googleusercontent.com/proxy',
  1012.           '||googleusercontent.com/gadgets/proxy',
  1013.         ],
  1014.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1015.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1016.       },
  1017.       {
  1018.         u: [
  1019.           '||googleusercontent.com/',
  1020.           '||ggpht.com/',
  1021.         ],
  1022.         s: (m, node) =>
  1023.           m.input.includes('webcache.') ||
  1024.           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/) ||
  1025.           node.matches('.g-hovercard *, a[href*="profile_redirector"] > img') ?
  1026.             '' :
  1027.             m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1028.               .replace(/=[-\w]+([&#].*|$)/, ''),
  1029.       },
  1030.       {
  1031.         u: '||gravatar.com/',
  1032.         r: /([a-z0-9]{32})/,
  1033.         s: 'https://gravatar.com/avatar/$1?s=200',
  1034.       },
  1035.       {
  1036.         u: '//gyazo.com/',
  1037.         r: /\.com\/\w{32,}/,
  1038.         q: 'meta[name="twitter:image"]',
  1039.         xhr: true,
  1040.       },
  1041.       {
  1042.         u: '||hostingkartinok.com/show-image.php',
  1043.         q: '.image img',
  1044.       },
  1045.       {
  1046.         u: [
  1047.           '||imagecurl.com/images/',
  1048.           '||imagecurl.com/viewer.php',
  1049.         ],
  1050.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1051.         s: 'https://imagecurl.com/images/$1$2$3',
  1052.       },
  1053.       {
  1054.         u: '||imagebam.com/image/',
  1055.         q: 'meta[property="og:image"]',
  1056.         tabfix: true,
  1057.         xhr: hostname.includes('planetsuzy'),
  1058.       },
  1059.       {
  1060.         u: '||imageban.ru/thumbs',
  1061.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1062.         s: '$1out$2/$3/$4',
  1063.       },
  1064.       {
  1065.         u: [
  1066.           '||imageban.ru/show',
  1067.           '||imageban.net/show',
  1068.           '||ibn.im/',
  1069.         ],
  1070.         q: '#img_main',
  1071.       },
  1072.       {
  1073.         u: '||imageshack.us/img',
  1074.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1075.         s: 'https://$2/download/$1/$3$4',
  1076.       },
  1077.       {
  1078.         u: '||imageshack.us/i/',
  1079.         q: '#share-dl',
  1080.       },
  1081.       {
  1082.         u: '||imageteam.org/img',
  1083.         q: 'img[alt="image"]',
  1084.       },
  1085.       {
  1086.         u: [
  1087.           '||imagetwist.com/',
  1088.           '||imageshimage.com/',
  1089.         ],
  1090.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1091.         q: 'img.pic',
  1092.         xhr: true,
  1093.       },
  1094.       {
  1095.         u: '||imageupper.com/i/',
  1096.         q: '#img',
  1097.         xhr: true,
  1098.       },
  1099.       {
  1100.         u: '||imagevenue.com/img.php',
  1101.         q: '#thepic',
  1102.       },
  1103.       {
  1104.         u: '||imagezilla.net/show/',
  1105.         q: '#photo',
  1106.         xhr: true,
  1107.       },
  1108.       {
  1109.         u: [
  1110.           '||images-na.ssl-images-amazon.com/images/',
  1111.           '||media-imdb.com/images/',
  1112.         ],
  1113.         r: /images\/.+?\.jpg/,
  1114.         s: '/V1\\.?_.+?\\.//g',
  1115.       },
  1116.       {
  1117.         u: '||imgbox.com/',
  1118.         r: /\.com\/([a-z0-9]+)$/i,
  1119.         q: '#img',
  1120.         xhr: hostname !== 'imgbox.com',
  1121.       },
  1122.       {
  1123.         u: '||imgclick.net/',
  1124.         r: /\.net\/(\w+)/,
  1125.         q: 'img.pic',
  1126.         xhr: true,
  1127.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1128.       },
  1129.       {
  1130.         u: [
  1131.           '||imgflip.com/i/',
  1132.           '||imgflip.com/gif/',
  1133.         ],
  1134.         r: /\/(i|gif)\/([^/?#]+)/,
  1135.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1136.       },
  1137.       {
  1138.         u: [
  1139.           '||imgur.com/a/',
  1140.           '||imgur.com/gallery/',
  1141.           '||imgur.com/t/',
  1142.         ],
  1143.         g: async (text, doc, url, m, rule, cb) => {
  1144.           // simplified extraction of JSON as it occupies only one line
  1145.           if (!/(?:mergeConfig\('gallery',\s*|Imgur\.Album\.getInstance\()[\s\S]*?[,\s{"'](?:image|album)\s*:\s*({[^\r\n]+?}),?[\r\n]/.test(text))
  1146.             return;
  1147.           const info = JSON.parse(RegExp.$1);
  1148.           let images = info.is_album ? info.album_images.images : [info];
  1149.           if (info.num_images > images.length) {
  1150.             const url = `https://imgur.com/ajaxalbums/getimages/${info.hash}/hit.json?all=true`;
  1151.             images = JSON.parse((await Remoting.gmXhr(url)).responseText).data.images;
  1152.           }
  1153.           const items = [];
  1154.           for (const img of images || []) {
  1155.             const u = `https://i.imgur.com/${img.hash}`;
  1156.             items.push({
  1157.               url: img.ext === '.gif' && img.animated !== false ?
  1158.                 [`${u}.webm`, `${u}.mp4`, u] :
  1159.                 u + img.ext,
  1160.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1161.             });
  1162.           }
  1163.           if (images && info.is_album && !safeIncludes(items[0].desc, info.title))
  1164.             items.title = info.title;
  1165.           cb(items);
  1166.         },
  1167.         css: '.post > .hover { display:none!important; }',
  1168.       },
  1169.       {
  1170.         u: '||imgur.com/',
  1171.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1172.         s: 'gallery',
  1173.         g: (text, doc, url, m) =>
  1174.           m[2].split(',').map(id => ({
  1175.             url: `https://i.${m[1]}${id}.jpg`,
  1176.           })),
  1177.       },
  1178.       {
  1179.         u: '||imgur.com/',
  1180.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.([a-z]+))/i,
  1181.         s: (m, node) => {
  1182.           if (/memegen|random|register|search|signin/.test(m.input))
  1183.             return '';
  1184.           const a = node.closest('a');
  1185.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1186.             return false;
  1187.           const id = m[3].replace(/(.{7})[bhm]$/, '$1');
  1188.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1189.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1190.           return ext === 'webm' ?
  1191.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1192.             u + ext;
  1193.         },
  1194.       },
  1195.       {
  1196.         u: [
  1197.           '||instagr.am/p/',
  1198.           '||instagram.com/p/',
  1199.         ],
  1200.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1201.         q: text => {
  1202.           const m = JSON.parse(text).graphql.shortcode_media;
  1203.           return m.video_url || m.display_url;
  1204.         },
  1205.         rect: 'div.PhotoGridMediaItem',
  1206.         c: text => {
  1207.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1208.           return m === undefined ? '(no caption)' : m.node.text;
  1209.         },
  1210.       },
  1211.       {
  1212.         u: [
  1213.           '||livememe.com/',
  1214.           '||lvme.me/',
  1215.         ],
  1216.         r: /\.\w+\/([^.]+)$/,
  1217.         s: 'http://i.lvme.me/$1.jpg',
  1218.       },
  1219.       {
  1220.         u: '||lostpic.net/image',
  1221.         q: '.image-viewer-image img',
  1222.       },
  1223.       {
  1224.         u: '||makeameme.org/meme/',
  1225.         r: /\/meme\/([^/?#]+)/,
  1226.         s: 'https://media.makeameme.org/created/$1.jpg',
  1227.       },
  1228.       {
  1229.         u: '||photobucket.com/',
  1230.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1231.         s: 'https://i$1$3',
  1232.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1233.       },
  1234.       {
  1235.         u: '||piccy.info/view3/',
  1236.         r: /(.+?\/view3)\/(.*)\//,
  1237.         s: '$1/$2/orig/',
  1238.         q: '#mainim',
  1239.       },
  1240.       {
  1241.         u: '||pimpandhost.com/image/',
  1242.         r: /(.+?\/image\/[0-9]+)/,
  1243.         s: '$1?size=original',
  1244.         q: 'img.original',
  1245.       },
  1246.       {
  1247.         u: [
  1248.           '||pixroute.com/',
  1249.           '||imgspice.com/',
  1250.         ],
  1251.         r: /\.html$/,
  1252.         q: 'img[id]',
  1253.         xhr: true,
  1254.       },
  1255.       {
  1256.         u: '||postima',
  1257.         r: /postima?ge?\.org\/image\/\w+/,
  1258.         q: [
  1259.           'a[href*="dl="]',
  1260.           '#main-image',
  1261.         ],
  1262.       },
  1263.       {
  1264.         u: [
  1265.           '||prntscr.com/',
  1266.           '||prnt.sc/',
  1267.         ],
  1268.         r: /\.\w+\/.+/,
  1269.         q: 'meta[property="og:image"]',
  1270.         xhr: true,
  1271.       },
  1272.       {
  1273.         u: '||radikal.ru/',
  1274.         r: /\.ru\/(fp|.+\.html)/,
  1275.         q: text => text.match(/http:\/\/[a-z0-9]+\.radikal\.ru[a-z0-9/]+\.(jpg|gif|png)/i)[0],
  1276.       },
  1277.       {
  1278.         u: '||tumblr.com',
  1279.         r: /_500\.jpg/,
  1280.         s: ['/_500/_1280/', ''],
  1281.       },
  1282.       {
  1283.         u: '||twimg.com/',
  1284.         r: /\/profile_images/i,
  1285.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1286.       },
  1287.       {
  1288.         u: '||twimg.com/media/',
  1289.         r: /.+?format=(jpe?g|png|gif)/i,
  1290.         s: '$0&name=large',
  1291.       },
  1292.       {
  1293.         u: '||twimg.com/1/proxy',
  1294.         r: /t=([^&_]+)/i,
  1295.         s: m => atob(m[1]).match(/http.+/),
  1296.       },
  1297.       {
  1298.         u: '||pic.twitter.com/',
  1299.         r: /\.com\/[a-z0-9]+/i,
  1300.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1301.         follow: true,
  1302.       },
  1303.       {
  1304.         u: '||twitpic.com/',
  1305.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1306.         s: 'https://twitpic.com/show/large/$2',
  1307.       },
  1308.       {
  1309.         u: '||upix.me/files',
  1310.         s: '/#//',
  1311.       },
  1312.       {
  1313.         u: '||wiki',
  1314.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1315.         s: '/\\/thumb(?=\\/)|' +
  1316.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1317.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1318.         xhr: !hostname.includes('wiki'),
  1319.       },
  1320.       {
  1321.         u: '||ytimg.com/vi/',
  1322.         r: /(.+?\/vi\/[^/]+)/,
  1323.         s: '$1/0.jpg',
  1324.         rect: '.video-list-item',
  1325.       },
  1326.       {
  1327.         u: '/viewer.php?file=',
  1328.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1329.         s: '$1/images/$2',
  1330.         xhr: true,
  1331.       },
  1332.       {
  1333.         u: '/thumb_',
  1334.         r: /\/albums.+\/thumb_[^/]/,
  1335.         s: '/thumb_//',
  1336.       },
  1337.       {
  1338.         u: [
  1339.           '.th.jp',
  1340.           '.th.gif',
  1341.           '.th.png',
  1342.         ],
  1343.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1344.         s: '$1$2',
  1345.         follow: true,
  1346.       },
  1347.       {
  1348.         r: /^[^?]+?\.(bmp|jpe?g?|gif|mp4|png|svg|webm)($|\?)/i,
  1349.       },
  1350.     ];
  1351.  
  1352.     /** @type mpiv.HostRule[] */
  1353.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1354.   }
  1355.  
  1356.   static format(rule, {expand} = {}) {
  1357.     const s = JSON.stringify(rule, null, ' ');
  1358.     return expand ?
  1359.       /* {"a": ...,
  1360.           "b": ...,
  1361.           "c": ...
  1362.          } */
  1363.       s.replace(/^{\s+/g, '{') :
  1364.       /* {"a": ..., "b": ..., "c": ...} */
  1365.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1366.   }
  1367.  
  1368.   /** @returns mpiv.HostRule | Error | false | undefined */
  1369.   static parse(rule) {
  1370.     const isBatchOp = this instanceof Map;
  1371.     try {
  1372.       if (typeof rule === 'string')
  1373.         rule = JSON.parse(rule);
  1374.       if ('d' in rule && typeof rule.d !== 'string')
  1375.         rule.d = undefined;
  1376.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1377.         return false;
  1378.       const compileTo = isBatchOp ? rule : {};
  1379.       if (rule.r)
  1380.         compileTo.r = new RegExp(rule.r, 'i');
  1381.       if (RX_HAS_CODE.test(rule.s))
  1382.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1383.       if (RX_HAS_CODE.test(rule.q))
  1384.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1385.       if (RX_HAS_CODE.test(rule.c))
  1386.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1387.       return rule;
  1388.     } catch (e) {
  1389.       if (!e.message.includes('unsafe-eval'))
  1390.         if (isBatchOp) {
  1391.           this.set(rule, e);
  1392.         } else {
  1393.           return e;
  1394.         }
  1395.     }
  1396.   }
  1397.  
  1398.   static runQ(text, doc, docUrl) {
  1399.     let url;
  1400.     if (typeof ai.rule.q === 'function') {
  1401.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1402.       if (Array.isArray(url)) {
  1403.         ai.urls = url.slice(1);
  1404.         url = url[0];
  1405.       }
  1406.     } else {
  1407.       const el = $many(ai.rule.q, doc);
  1408.       url = el && Remoting.findImageUrl(el, docUrl);
  1409.     }
  1410.     return url;
  1411.   }
  1412.  
  1413.   static runS(node, rule, m) {
  1414.     let urls = [];
  1415.     for (const s of ensureArray(rule.s))
  1416.       urls.push(
  1417.         typeof s === 'string' ? Util.maybeDecodeUrl(Ruler.substituteSingle(s, m)) :
  1418.           typeof s === 'function' ? s(m, node, rule) :
  1419.             s);
  1420.     if (rule.q && urls.length > 1) {
  1421.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1422.       return {skipRule: true};
  1423.     }
  1424.     if (Array.isArray(urls[0]))
  1425.       urls = urls[0];
  1426.     // `false` returned by "s" property means "skip this rule"
  1427.     // any other falsy value (like say "") means "stop all rules"
  1428.     return urls[0] === false ? {skipRule: true} : urls.map(Util.maybeDecodeUrl);
  1429.   }
  1430.  
  1431.   static substituteSingle(s, m) {
  1432.     if (!m) return s;
  1433.     if (s.startsWith('/') && !s.startsWith('//')) {
  1434.       const mid = s.search(/[^\\]\//) + 1;
  1435.       const end = s.lastIndexOf('/');
  1436.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1437.       return m.input.replace(re, s.slice(mid + 1, end));
  1438.     }
  1439.     if (m.length && s.includes('$')) {
  1440.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  1441.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  1442.         for (let i = maxLength; i >= 0; i--) {
  1443.           const part = num.slice(0, i) | 0;
  1444.           if (part < m.length)
  1445.             return (m[part] || '') + num.slice(i);
  1446.         }
  1447.         return text;
  1448.       });
  1449.     }
  1450.     return s;
  1451.   }
  1452. }
  1453.  
  1454. const SimpleUrlMatcher = (() => {
  1455.   // string-to-regexp escaped chars
  1456.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  1457.   // rx for '^' symbol in simple url match
  1458.   const RX_SEP = /[^\w%._-]/g;
  1459.   const RXS_SEP = RX_SEP.source;
  1460.   return match => {
  1461.     const results = [];
  1462.     for (const s of ensureArray(match)) {
  1463.       const pinDomain = s.startsWith('||');
  1464.       const pinStart = !pinDomain && s.startsWith('|');
  1465.       const endSep = s.endsWith('^');
  1466.       let fn;
  1467.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  1468.       if (needle.includes('^')) {
  1469.         const plain = findLongestPart(needle);
  1470.         const rx = new RegExp(
  1471.           (pinStart ? '^' : '') +
  1472.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  1473.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  1474.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  1475.         needle = [plain, rx];
  1476.         fn = regexp;
  1477.       } else if (pinStart) {
  1478.         fn = endSep ? equals : starts;
  1479.       } else if (pinDomain) {
  1480.         const slashPos = needle.indexOf('/');
  1481.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  1482.         needle = [needle, domain, slashPos > 0, endSep];
  1483.         fn = startsDomainPrescreen;
  1484.       } else if (endSep) {
  1485.         fn = ends;
  1486.       } else {
  1487.         fn = has;
  1488.       }
  1489.       results.push({fn, this: needle});
  1490.     }
  1491.     return results.length > 1 ?
  1492.       {fn: checkArray, this: results} :
  1493.       results[0];
  1494.   };
  1495.   function checkArray(s) {
  1496.     return this.some(checkArrayItem, s);
  1497.   }
  1498.   function checkArrayItem(item) {
  1499.     return item.fn.call(item.this, this);
  1500.   }
  1501.   function equals(s) {
  1502.     return s.startsWith(this) && (
  1503.       s.length === this.length ||
  1504.       s.length === this.length + 1 && endsWithSep(s));
  1505.   }
  1506.   function starts(s) {
  1507.     return s.startsWith(this);
  1508.   }
  1509.   function ends(s) {
  1510.     return s.endsWith(this) || (
  1511.       s.length > this.length &&
  1512.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  1513.       endsWithSep(s));
  1514.   }
  1515.   function has(s) {
  1516.     return s.includes(this);
  1517.   }
  1518.   function regexp(s) {
  1519.     return s.includes(this[0]) && this[1].test(s);
  1520.   }
  1521.   function endsWithSep(s) {
  1522.     RX_SEP.lastIndex = s.length - 1;
  1523.     return RX_SEP.test(s);
  1524.   }
  1525.   function startsDomainPrescreen(url) {
  1526.     return url.includes(this[0]) && startsDomain.call(this, url);
  1527.   }
  1528.   function startsDomain(url) {
  1529.     const [p, gap, host] = url.split('/', 3);
  1530.     if (gap || p && !p.endsWith(':'))
  1531.       return;
  1532.     const [needle, domain, pinDomainEnd, endSep] = this;
  1533.     let start = pinDomainEnd ? host.length - domain.length : 0;
  1534.     for (; ; start++) {
  1535.       start = host.indexOf(domain, start);
  1536.       if (start < 0)
  1537.         return;
  1538.       if (!start || host[start - 1] === '.')
  1539.         break;
  1540.     }
  1541.     start += p.length + 2;
  1542.     return url.lastIndexOf(needle, start) === start &&
  1543.            (!endSep || start + needle.length === url.length);
  1544.   }
  1545.   function findLongestPart(s) {
  1546.     const len = s.length;
  1547.     let maxLen = 0;
  1548.     let start;
  1549.     for (let i = 0, j; i < len; i = j + 1) {
  1550.       j = s.indexOf('^', i);
  1551.       if (j < 0)
  1552.         j = len;
  1553.       if (j - i > maxLen) {
  1554.         maxLen = j - i;
  1555.         start = i;
  1556.       }
  1557.     }
  1558.     return maxLen < len ? s.substr(start, maxLen) : s;
  1559.   }
  1560. })();
  1561.  
  1562. class RuleMatcher {
  1563.  
  1564.   /** @returns ?mpiv.RuleMatchInfo */
  1565.   static findForLink(a) {
  1566.     let url =
  1567.       a.getAttribute('data-expanded-url') ||
  1568.       a.getAttribute('data-full-url') ||
  1569.       a.getAttribute('data-url') ||
  1570.       a.href;
  1571.     if (url.startsWith('data:'))
  1572.       url = false;
  1573.     else if (url.includes('//t.co/'))
  1574.       url = 'http://' + a.textContent;
  1575.     return RuleMatcher.find(url, a);
  1576.   }
  1577.  
  1578.   /** @returns ?mpiv.RuleMatchInfo */
  1579.   static find(url, node, {noHtml, skipRule} = {}) {
  1580.     const tn = node.tagName;
  1581.     let m, html, urls;
  1582.     for (const rule of Ruler.rules) {
  1583.       const {e} = rule;
  1584.       if (e && !node.matches(e) || rule === skipRule)
  1585.         continue;
  1586.       const {r, u} = rule;
  1587.       if (r && !noHtml && rule.html && ('A,IMG,VIDEO'.includes(tn) || e))
  1588.         m = r.exec(html || (html = node.outerHTML));
  1589.       else if (r || u)
  1590.         m = url && RuleMatcher.makeUrlMatch(url, node, rule, r, u);
  1591.       else
  1592.         m = url ? RuleMatcher.makeDummyMatch(url) : [];
  1593.       if (!m ||
  1594.           // a rule with follow:true for the currently hovered IMG produced a URL,
  1595.           // but we'll only allow it to match rules without 's' in the nested find call
  1596.           'IMG,VIDEO'.includes(tn) && !('s' in rule) && !skipRule)
  1597.         continue;
  1598.       if (rule.s === '')
  1599.         return {};
  1600.       const hasS = 's' in rule && rule.s !== 'gallery';
  1601.       urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  1602.       if (!urls.skipRule) {
  1603.         const url = urls[0];
  1604.         return !url ? {} :
  1605.           hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule) ?
  1606.             RuleMatcher.find(url, node, {skipRule: rule}) :
  1607.             RuleMatcher.makeInfo(urls, node, rule, m);
  1608.       }
  1609.     }
  1610.   }
  1611.  
  1612.   static makeUrlMatch(url, node, rule, r, u) {
  1613.     let m;
  1614.     if (u) {
  1615.       u = rule._u || (rule._u = SimpleUrlMatcher(u));
  1616.       m = u.fn.call(u.this, url) && (r || RuleMatcher.makeDummyMatch(url));
  1617.     }
  1618.     return (m || !u) && r ? r.exec(url) : m;
  1619.   }
  1620.  
  1621.   static makeDummyMatch(url) {
  1622.     const m = [url];
  1623.     m.index = 0;
  1624.     m.input = url;
  1625.     return m;
  1626.   }
  1627.  
  1628.   /** @returns mpiv.RuleMatchInfo */
  1629.   static makeInfo(urls, node, rule, m) {
  1630.     const url = urls[0];
  1631.     const info = {
  1632.       node,
  1633.       rule,
  1634.       url,
  1635.       urls: urls.length > 1 ? urls.slice(1) : null,
  1636.       match: m,
  1637.       gallery: rule.g && Gallery.makeParser(rule.g),
  1638.       post: typeof rule.post === 'function' ? rule.post(m) : rule.post,
  1639.       xhr: cfg.xhr && rule.xhr,
  1640.     };
  1641.     Util.lazyGetRect(info, node, rule.rect);
  1642.     if (
  1643.       dotDomain.endsWith('.twitter.com') && !/(facebook|google|twimg|twitter)\.com\//.test(url) ||
  1644.       dotDomain.endsWith('.github.com') && !/github/.test(url) ||
  1645.       dotDomain.endsWith('.facebook.com') && /\bimgur\.com/.test(url)
  1646.     ) {
  1647.       info.xhr = 'data';
  1648.     }
  1649.     return info;
  1650.   }
  1651.  
  1652.   static isFollowableUrl(url, rule) {
  1653.     const f = rule.follow;
  1654.     return typeof f === 'function' ? f(url) : f;
  1655.   }
  1656. }
  1657.  
  1658. class Events {
  1659.  
  1660.   static onMouseOver(e) {
  1661.     if (!App.enabled || e.shiftKey || ai.zoom)
  1662.       return;
  1663.     let node = e.target;
  1664.     if (node === ai.popup ||
  1665.         node === doc.body ||
  1666.         node === doc.documentElement)
  1667.       return;
  1668.     if (node.shadowRoot)
  1669.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  1670.     if (!Ruler.rules)
  1671.       Ruler.init();
  1672.     let a;
  1673.     const tag = node.tagName;
  1674.     const src = node.currentSrc || node.src;
  1675.     const isPic = tag === 'IMG' || tag === 'VIDEO' && /\.(webm|mp4)(\?|$)/.test(src);
  1676.     const info =
  1677.       tag !== 'A' &&
  1678.         RuleMatcher.find(isPic && Util.rel2abs(src), node) ||
  1679.       (a = node.closest('A')) &&
  1680.         RuleMatcher.findForLink(a) ||
  1681.       isPic &&
  1682.         Util.lazyGetRect({node, rule: {}, url: src}, node);
  1683.     if (info && info.url && info.node !== ai.node)
  1684.       App.activate(info, e);
  1685.   }
  1686.  
  1687.   static pierceShadow(node, x, y) {
  1688.     for (let root; (root = node.shadowRoot);) {
  1689.       root.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  1690.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1691.       const inner = root.elementFromPoint(x, y);
  1692.       if (!inner || inner === node)
  1693.         break;
  1694.       node = inner;
  1695.     }
  1696.     return node;
  1697.   }
  1698.  
  1699.   static onMouseOut(e) {
  1700.     if (!e.relatedTarget && !e.shiftKey)
  1701.       App.deactivate();
  1702.   }
  1703.  
  1704.   static onMouseOutShadow(e) {
  1705.     const root = e.target.shadowRoot;
  1706.     if (root) {
  1707.       root.removeEventListener('mouseover', Events.onMouseOver);
  1708.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  1709.     }
  1710.   }
  1711.  
  1712.   static onMouseMove(e) {
  1713.     App.updateMouse(e);
  1714.     if (e.shiftKey) {
  1715.       ai.lazyUnload = true;
  1716.     } else if (!ai.zoomed && !ai.isOverRect) {
  1717.       App.deactivate();
  1718.     } else if (ai.zoom) {
  1719.       Popup.move();
  1720.       const {height: h, width: w} = ai.view;
  1721.       const {clientX: cx, clientY: cy} = ai;
  1722.       const bx = w / 6;
  1723.       const by = h / 6;
  1724.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  1725.       App.setStatus(`${onEdge ? '+' : '-'}edge`);
  1726.     }
  1727.   }
  1728.  
  1729.   static onMouseDown({shiftKey, button}) {
  1730.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  1731.       ai.controlled = ai.zoomed = true;
  1732.     } else if (button === 2 || shiftKey) {
  1733.       // we ignore RMB and Shift
  1734.     } else {
  1735.       App.deactivate({wait: true});
  1736.     }
  1737.   }
  1738.  
  1739.   static onMouseScroll(e) {
  1740.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  1741.     if (ai.zoom) {
  1742.       App.zoomInOut(dir);
  1743.     } else if (ai.gItems && ai.gItems.length > 1 && ai.popup) {
  1744.       Gallery.next(dir);
  1745.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  1746.       App.zoomToggle();
  1747.     } else {
  1748.       App.deactivate();
  1749.       return;
  1750.     }
  1751.     dropEvent(e);
  1752.   }
  1753.  
  1754.   static onKeyDown(e) {
  1755.     switch (e.key) {
  1756.       case 'Shift':
  1757.         App.setStatus('+shift');
  1758.         if (ai.popup && 'controls' in ai.popup)
  1759.           ai.popup.controls = true;
  1760.         break;
  1761.       case 'Control':
  1762.         if (!ai.popup && (cfg.start !== 'auto' || ai.rule.manual))
  1763.           Popup.start();
  1764.         break;
  1765.     }
  1766.   }
  1767.  
  1768.   static onKeyUp(e) {
  1769.     switch (e.key.length > 1 ? e.key : e.code) {
  1770.       case 'Shift':
  1771.         App.setStatus('-shift');
  1772.         if ((ai.popup || {}).controls)
  1773.           ai.popup.controls = false;
  1774.         if (ai.controlled) {
  1775.           ai.controlled = false;
  1776.           return;
  1777.         }
  1778.         ai.popup && (ai.zoomed || ai.isOverRect !== false) ?
  1779.           App.zoomToggle() :
  1780.           App.deactivate({wait: true});
  1781.         break;
  1782.       case 'Control':
  1783.         break;
  1784.       case 'Escape':
  1785.         App.deactivate({wait: true});
  1786.         break;
  1787.       case 'ArrowRight':
  1788.       case 'KeyJ':
  1789.         dropEvent(e);
  1790.         Gallery.next(1);
  1791.         break;
  1792.       case 'ArrowLeft':
  1793.       case 'KeyK':
  1794.         dropEvent(e);
  1795.         Gallery.next(-1);
  1796.         break;
  1797.       case 'KeyD': {
  1798.         dropEvent(e);
  1799.         Remoting.saveFile();
  1800.         break;
  1801.       }
  1802.       case 'KeyT':
  1803.         ai.lazyUnload = true;
  1804.         GM_openInTab(
  1805.           ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  1806.           navigator.userAgent.includes('Gecko/') ?
  1807.             Util.tabFixUrl() :
  1808.             ai.popup.src);
  1809.         App.deactivate();
  1810.         break;
  1811.       default:
  1812.         App.deactivate({wait: true});
  1813.     }
  1814.   }
  1815.  
  1816.   static onContext(e) {
  1817.     if (e.shiftKey) return;
  1818.     if (cfg.zoom === 'context' && ai.popup && App.zoomToggle()) {
  1819.       dropEvent(e);
  1820.     } else if (!ai.popup && (cfg.start === 'context' || (cfg.start === 'auto' && ai.rule.manual))) {
  1821.       Popup.start();
  1822.       dropEvent(e);
  1823.     } else {
  1824.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1825.     }
  1826.   }
  1827. }
  1828.  
  1829. class Popup {
  1830.  
  1831.   static schedule(force) {
  1832.     if (!cfg.preload) {
  1833.       ai.timer = setTimeout(Popup.start, cfg.delay);
  1834.     } else if (!force) {
  1835.       // we don't want to preload everything in the path of a quickly moving mouse cursor
  1836.       ai.timer = setTimeout(Popup.schedule, SETTLE_TIME, true);
  1837.       ai.preloadStart = Date.now();
  1838.     } else {
  1839.       Popup.start();
  1840.       App.setStatus('+preloading');
  1841.       setTimeout(App.setStatus, cfg.delay, '-preloading');
  1842.     }
  1843.   }
  1844.  
  1845.   static start() {
  1846.     App.updateStyles();
  1847.     ai.gallery ?
  1848.       Popup.startGallery() :
  1849.       Popup.startSingle();
  1850.   }
  1851.  
  1852.   static startSingle() {
  1853.     App.setStatusLoading();
  1854.     ai.imageUrl = null;
  1855.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  1856.       Remoting.findRedirect();
  1857.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  1858.       Popup.startFromQ();
  1859.     } else {
  1860.       App.updateCaption();
  1861.       Popup.render(ai.url);
  1862.     }
  1863.   }
  1864.  
  1865.   static async startFromQ() {
  1866.     try {
  1867.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  1868.       const url = Ruler.runQ(responseText, doc, finalUrl);
  1869.       if (!url)
  1870.         throw 'File not found.';
  1871.       App.updateCaption(responseText, doc);
  1872.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  1873.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  1874.         if (!info || !info.url)
  1875.           throw `Couldn't follow URL: ${url}`;
  1876.         Object.assign(ai, info);
  1877.         Popup.startSingle();
  1878.       } else {
  1879.         Popup.render(url, finalUrl);
  1880.       }
  1881.     } catch (e) {
  1882.       App.handleError(e);
  1883.     }
  1884.   }
  1885.  
  1886.   static async startGallery() {
  1887.     App.setStatusLoading();
  1888.     try {
  1889.       const startUrl = ai.url;
  1890.       const p = ai.rule.s === 'gallery' ? {} : await Remoting.getDoc(startUrl);
  1891.       const items = await new Promise(resolve => {
  1892.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, resolve);
  1893.         if (Array.isArray(it))
  1894.           resolve(it);
  1895.       });
  1896.       // bail out if the gallery's async callback took too long
  1897.       if (ai.url !== startUrl) return;
  1898.       ai.gItems = items.length && items;
  1899.       if (ai.gItems) {
  1900.         ai.gIndex = Gallery.findIndex(ai.url);
  1901.         setTimeout(Gallery.next);
  1902.       } else {
  1903.         throw 'Empty gallery';
  1904.       }
  1905.     } catch (e) {
  1906.       App.handleError(e);
  1907.     }
  1908.   }
  1909.  
  1910.   static async render(src, pageUrl) {
  1911.     Popup.destroy();
  1912.     ai.imageUrl = src;
  1913.     if (ai.xhr && src)
  1914.       src = await Remoting.getImage(src, pageUrl).catch(App.handleError);
  1915.     if (!src) return;
  1916.     const p = ai.popup =
  1917.       src.startsWith('data:video') ||
  1918.       !src.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(src) ?
  1919.         PopupVideo.create() :
  1920.         $create('img');
  1921.     p.id = `${PREFIX}popup`;
  1922.     p.src = src;
  1923.     p.addEventListener('error', App.handleError);
  1924.     p.addEventListener('load', Popup.onLoad, {once: true});
  1925.     if (ai.zooming)
  1926.       p.addEventListener('transitionend', Popup.onZoom);
  1927.     doc.body.insertBefore(p, ai.bar || undefined);
  1928.     await 0;
  1929.     App.checkProgress({start: true});
  1930.   }
  1931.  
  1932.   static onLoad() {
  1933.     this.setAttribute('loaded', '');
  1934.     ai.popupLoaded = true;
  1935.     if (!ai.bar)
  1936.       App.updateFileInfo();
  1937.   }
  1938.  
  1939.   static onZoom() {
  1940.     this.classList.remove(`${PREFIX}zooming`);
  1941.   }
  1942.  
  1943.   static move() {
  1944.     const p = ai.popup;
  1945.     if (!p) return;
  1946.     let x, y;
  1947.     const w = Math.round(ai.scale * ai.nwidth);
  1948.     const h = Math.round(ai.scale * ai.nheight);
  1949.     const cx = ai.clientX;
  1950.     const cy = ai.clientY;
  1951.     const vw = ai.view.width - ai.outline * 2;
  1952.     const vh = ai.view.height - ai.outline * 2;
  1953.     if (!ai.zoom && (!ai.gItems || ai.gItems.length < 2) && !cfg.center) {
  1954.       const r = ai.rect;
  1955.       const rx = (r.left + r.right) / 2;
  1956.       const ry = (r.top + r.bottom) / 2;
  1957.       if (vw - r.right - 40 > w + ai.mbw || w + ai.mbw < r.left - 40) {
  1958.         if (h + ai.mbh < vh - 60)
  1959.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1960.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1961.       } else if (vh - r.bottom - 40 > h + ai.mbh || h + ai.mbh < r.top - 40) {
  1962.         if (w + ai.mbw < vw - 60)
  1963.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1964.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1965.       }
  1966.     }
  1967.     if (x === undefined) {
  1968.       const mid = vw > w ?
  1969.         vw / 2 - w / 2 :
  1970.         -1 * clamp(5 / 3 * (cx / vw - 0.2), 0, 1) * (w - vw);
  1971.       x = Math.round(mid - (ai.pw + ai.mbw) / 2);
  1972.     }
  1973.     if (y === undefined) {
  1974.       const mid = vh > h ?
  1975.         vh / 2 - h / 2 :
  1976.         -1 * clamp(5 / 3 * (cy / vh - 0.2), 0, 1) * (h - vh);
  1977.       y = Math.round(mid - (ai.ph + ai.mbh) / 2);
  1978.     }
  1979.     p.style.setProperty('transform',
  1980.       `translate(${x + ai.outline}px, ${y + ai.outline}px) scale(${ai.scale})`, 'important');
  1981.   }
  1982.  
  1983.   static destroy() {
  1984.     const p = ai.popup;
  1985.     if (!p) return;
  1986.     p.removeEventListener('error', App.handleError);
  1987.     if (typeof p.pause === 'function')
  1988.       p.pause();
  1989.     if (!ai.lazyUnload) {
  1990.       if (p.src.startsWith('blob:'))
  1991.         URL.revokeObjectURL(p.src);
  1992.       p.src = '';
  1993.     }
  1994.     p.remove();
  1995.     ai.zoom = ai.popup = ai.popupLoaded = null;
  1996.   }
  1997. }
  1998.  
  1999. class PopupVideo {
  2000.   static create() {
  2001.     const p = $create('video');
  2002.     p.autoplay = true;
  2003.     p.loop = true;
  2004.     p.volume = 0.5;
  2005.     p.controls = false;
  2006.     p.addEventListener('progress', PopupVideo.progress);
  2007.     p.addEventListener('canplaythrough', PopupVideo.progressDone, {once: true});
  2008.     ai.bufferingBar = false;
  2009.     ai.bufferingStart = Date.now();
  2010.     return p;
  2011.   }
  2012.  
  2013.   static progress() {
  2014.     const {duration} = this;
  2015.     if (duration && this.buffered.length && Date.now() - ai.bufferingStart > 2000) {
  2016.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  2017.       if ((ai.bufferingBar |= pct > 0 && pct < 50))
  2018.         App.setBar(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  2019.     }
  2020.   }
  2021.  
  2022.   static progressDone() {
  2023.     this.play(); // sometimes videos are paused, see https://github.com/tophf/mpiv/issues/8
  2024.     this.removeEventListener('progress', PopupVideo.progress);
  2025.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`)) {
  2026.       App.setBar(false);
  2027.       App.updateFileInfo();
  2028.     }
  2029.   }
  2030. }
  2031.  
  2032. class Gallery {
  2033.  
  2034.   static makeParser(g) {
  2035.     return (
  2036.       typeof g === 'function' ? g :
  2037.         typeof g === 'string' ? Util.newFunction('text', 'doc', 'url', 'm', 'rule', 'cb', g) :
  2038.           Gallery.defaultParser
  2039.     );
  2040.   }
  2041.  
  2042.   static findIndex(gUrl) {
  2043.     const sel = gUrl.split('#')[1];
  2044.     if (!sel)
  2045.       return 0;
  2046.     if (/^\d+$/.test(sel))
  2047.       return parseInt(sel);
  2048.     for (let i = ai.gItems.length; i--;) {
  2049.       let {url} = ai.gItems[i];
  2050.       if (Array.isArray(url))
  2051.         url = url[0];
  2052.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  2053.         return i;
  2054.     }
  2055.     return 0;
  2056.   }
  2057.  
  2058.   static next(dir) {
  2059.     if (dir < 0 && (ai.gIndex -= dir) >= ai.gItems.length) {
  2060.       ai.gIndex = 0;
  2061.     } else if (dir > 0 && (ai.gIndex -= dir) < 0) {
  2062.       ai.gIndex = ai.gItems.length - 1;
  2063.     }
  2064.     const item = ai.gItems[ai.gIndex];
  2065.     if (Array.isArray(item.url)) {
  2066.       ai.urls = item.url.slice(1);
  2067.       ai.url = item.url[0];
  2068.     } else {
  2069.       ai.urls = null;
  2070.       ai.url = item.url;
  2071.     }
  2072.     Popup.destroy();
  2073.     Popup.startSingle();
  2074.     App.updateFileInfo();
  2075.     Gallery.preload(dir);
  2076.   }
  2077.  
  2078.   static preload(dir) {
  2079.     const i = ai.gIndex - dir;
  2080.     if (ai.popup && i >= 0 && i < ai.gItems.length) {
  2081.       ai.preloadUrl = ensureArray(ai.gItems[i].url)[0];
  2082.       ai.popup.addEventListener('load', Gallery.preloadOnLoad, {once: true});
  2083.     }
  2084.   }
  2085.  
  2086.   static preloadOnLoad() {
  2087.     $create('img', {src: ai.preloadUrl});
  2088.   }
  2089.  
  2090.   static defaultParser(text, doc, docUrl, m, rule) {
  2091.     const {g} = rule;
  2092.     const qEntry = g.entry;
  2093.     const qCaption = ensureArray(g.caption);
  2094.     const qImage = g.image;
  2095.     const qTitle = g.title;
  2096.     const fix =
  2097.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  2098.       (s => s.trim());
  2099.     const items = [...$$(qEntry || qImage, doc)]
  2100.       .map(processEntry)
  2101.       .filter(Boolean);
  2102.     items.title = processTitle();
  2103.     return items;
  2104.  
  2105.     function processEntry(entry) {
  2106.       const item = {};
  2107.       try {
  2108.         const img = qEntry ? $(qImage, entry) : entry;
  2109.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  2110.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  2111.       } catch (e) {}
  2112.       return item.url && item;
  2113.     }
  2114.  
  2115.     function processCaption(selector) {
  2116.       const el = $(selector, this) ||
  2117.                  $orSelf(selector, this.previousElementSibling) ||
  2118.                  $orSelf(selector, this.nextElementSibling);
  2119.       return el && fix(el.textContent);
  2120.     }
  2121.  
  2122.     function processTitle() {
  2123.       const el = $(qTitle, doc);
  2124.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  2125.     }
  2126.  
  2127.     function $orSelf(selector, el) {
  2128.       if (el && !el.matches(qEntry))
  2129.         return el.matches(selector) ? el : $(selector, el);
  2130.     }
  2131.   }
  2132. }
  2133.  
  2134. class Remoting {
  2135.  
  2136.   static gmXhr(url, opts = {}) {
  2137.     if (ai.req)
  2138.       tryCatch.call(ai.req, ai.req.abort);
  2139.     return new Promise((resolve, reject) => {
  2140.       ai.req = GM_xmlhttpRequest({
  2141.         url,
  2142.         method: 'GET',
  2143.         anonymous: (ai.rule || {}).anonymous,
  2144.         timeout: 10e3,
  2145.         ...opts,
  2146.         onload: done,
  2147.         onerror: done,
  2148.         ontimeout() {
  2149.           ai.req = null;
  2150.           reject(`Timeout fetching ${url}`);
  2151.         },
  2152.       });
  2153.       function done(r) {
  2154.         ai.req = null;
  2155.         r.status < 400 && !r.error ?
  2156.           resolve(r) :
  2157.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2158.       }
  2159.     });
  2160.   }
  2161.  
  2162.   static async getDoc(url) {
  2163.     const r = await (!ai.post ?
  2164.       Remoting.gmXhr(url) :
  2165.       Remoting.gmXhr(url, {
  2166.         method: 'POST',
  2167.         data: ai.post,
  2168.         headers: {
  2169.           'Content-Type': 'application/x-www-form-urlencoded',
  2170.           'Referer': url,
  2171.         },
  2172.       }));
  2173.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2174.     return r;
  2175.   }
  2176.  
  2177.   static async getImage(url, pageUrl) {
  2178.     ai.bufferingBar = false;
  2179.     ai.bufferingStart = Date.now();
  2180.     const response = await Remoting.gmXhr(url, {
  2181.       responseType: 'blob',
  2182.       headers: {
  2183.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2184.         Referer: pageUrl || (typeof ai.xhr === 'function' ? ai.xhr() : url),
  2185.       },
  2186.       onprogress: Remoting.getImageProgress,
  2187.     });
  2188.     App.setBar(false);
  2189.     const type = Remoting.guessMimeType(response);
  2190.     let b = response.response;
  2191.     if (b.type !== type)
  2192.       b = b.slice(0, b.size, type);
  2193.     return ai.xhr === 'data' ?
  2194.       Remoting.blobToDataUrl(b) :
  2195.       URL.createObjectURL(b);
  2196.   }
  2197.  
  2198.   static getImageProgress(e) {
  2199.     if (!ai.bufferingBar && Date.now() - ai.bufferingStart > 3000 && e.loaded / e.total < 0.5)
  2200.       ai.bufferingBar = true;
  2201.     if (ai.bufferingBar) {
  2202.       const pct = e.loaded / e.total * 100 | 0;
  2203.       const size = e.total / 1024 | 0;
  2204.       App.setBar(`${pct}% of ${size} kiB`, 'xhr');
  2205.     }
  2206.   }
  2207.  
  2208.   static async findRedirect() {
  2209.     try {
  2210.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2211.         method: 'HEAD',
  2212.         headers: {
  2213.           'Referer': location.href.split('#', 1)[0],
  2214.         },
  2215.       });
  2216.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2217.       if (!info || !info.url)
  2218.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2219.       Object.assign(ai, info);
  2220.       Popup.startSingle();
  2221.     } catch (e) {
  2222.       App.handleError(e);
  2223.     }
  2224.   }
  2225.  
  2226.   static async saveFile() {
  2227.     let url = ai.popup.src || ai.popup.currentSrc;
  2228.     let name = Remoting.getFileName(ai.imageUrl || url);
  2229.     if (!name.includes('.'))
  2230.       name += '.jpg';
  2231.     try {
  2232.       if (!url.startsWith('blob:') && !url.startsWith('data:')) {
  2233.         const {response} = await Remoting.gmXhr(url, {
  2234.           responseType: 'blob',
  2235.           headers: {'Referer': url},
  2236.         });
  2237.         url = URL.createObjectURL(response);
  2238.         setTimeout(() => URL.revokeObjectURL(url), 1000);
  2239.       }
  2240.       $create('a', {href: url, download: name})
  2241.         .dispatchEvent(new MouseEvent('click'));
  2242.     } catch (e) {
  2243.       App.setBar(`Could not download ${name}.`, 'error');
  2244.     }
  2245.   }
  2246.  
  2247.   static getFileName(url) {
  2248.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2249.   }
  2250.  
  2251.   static blobToDataUrl(blob) {
  2252.     return new Promise((resolve, reject) => {
  2253.       const fr = new FileReader();
  2254.       fr.onload = () => resolve(fr.result);
  2255.       fr.onerror = reject;
  2256.       fr.readAsDataURL(blob);
  2257.     });
  2258.   }
  2259.  
  2260.   static guessMimeType({responseHeaders, finalUrl}) {
  2261.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2262.         !RegExp.$1.includes('text/plain'))
  2263.       return RegExp.$1;
  2264.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2265.     switch (ext.toLowerCase()) {
  2266.       case 'bmp': return 'image/bmp';
  2267.       case 'gif': return 'image/gif';
  2268.       case 'jpe': return 'image/jpeg';
  2269.       case 'jpeg': return 'image/jpeg';
  2270.       case 'jpg': return 'image/jpeg';
  2271.       case 'mp4': return 'video/mp4';
  2272.       case 'png': return 'image/png';
  2273.       case 'svg': return 'image/svg+xml';
  2274.       case 'tif': return 'image/tiff';
  2275.       case 'tiff': return 'image/tiff';
  2276.       case 'webm': return 'video/webm';
  2277.       default: return 'application/octet-stream';
  2278.     }
  2279.   }
  2280.  
  2281.   static findImageUrl(n, url) {
  2282.     let html;
  2283.     const path =
  2284.       n.getAttribute('src') ||
  2285.       n.getAttribute('data-m4v') ||
  2286.       n.getAttribute('href') ||
  2287.       n.getAttribute('content') ||
  2288.       (html = n.outerHTML).includes('http') &&
  2289.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2290.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2291.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2292.   }
  2293. }
  2294.  
  2295. class Util {
  2296.  
  2297.   static addStyle(name, css) {
  2298.     const id = `${PREFIX}style:${name}`;
  2299.     const el = doc.getElementById(id) ||
  2300.                css && $create('style', {id});
  2301.     if (!el) return;
  2302.     if (el.textContent !== css)
  2303.       el.textContent = css;
  2304.     if (el.parentElement !== doc.head)
  2305.       doc.head.appendChild(el);
  2306.     return el;
  2307.   }
  2308.  
  2309.   static decodeHtmlEntities(s) {
  2310.     return s
  2311.       .replace(/&quot;/g, '"')
  2312.       .replace(/&apos;/g, '\'')
  2313.       .replace(/&lt;/g, '<')
  2314.       .replace(/&gt;/g, '>')
  2315.       .replace(/&amp;/g, '&');
  2316.   }
  2317.   static deepEqual(a, b) {
  2318.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2319.       return a === b;
  2320.     if (Array.isArray(a)) {
  2321.       return Array.isArray(b) &&
  2322.         a.length === b.length &&
  2323.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2324.     }
  2325.     const keys = Object.keys(a);
  2326.     return keys.length === Object.keys(b).length &&
  2327.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2328.   }
  2329.  
  2330.   static findScale(url, parent) {
  2331.     const imgs = $$('img, video', parent);
  2332.     for (let i = imgs.length, img; (img = imgs[--i]);) {
  2333.       if ((img.currentSrc || img.src) !== url || img.sizes)
  2334.         continue;
  2335.       const scaleX = (img.naturalWidth || img.videoWidth) / img.offsetWidth;
  2336.       const scaleY = (img.naturalHeight || img.videoHeight) / img.offsetHeight;
  2337.       const s = Math.max(scaleX, scaleY);
  2338.       if (isFinite(s))
  2339.         return s;
  2340.     }
  2341.   }
  2342.  
  2343.   static findScaleIndex(dir) {
  2344.     const i = ai.scales.indexOf(ai.scale);
  2345.     if (i >= 0) return i + dir;
  2346.     for (let len = ai.scales.length, i = dir > 0 ? 0 : len - 1; i >= 0 && i < len; i += dir)
  2347.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  2348.         return i;
  2349.     return -1;
  2350.   }
  2351.  
  2352.   static forceLayout(node) {
  2353.     // eslint-disable-next-line no-unused-expressions
  2354.     node.clientHeight;
  2355.   }
  2356.  
  2357.   static formatError(e, rule) {
  2358.     const message =
  2359.       e.message ||
  2360.       e.readyState && 'Request failed.' ||
  2361.       e.type === 'error' && `File can't be displayed.${
  2362.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2363.       }` ||
  2364.       e;
  2365.     const m = [
  2366.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2367.       ['', 'font-weight:normal;color:unset'],
  2368.     ];
  2369.     m.push(...[
  2370.       rule.u && ['Url simple match: %o', rule.u],
  2371.       rule.e && ['Element match: %o', rule.e],
  2372.       rule.r && ['RegExp match: %o', rule.r],
  2373.       ai.url && ['URL: %s', ai.url],
  2374.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2375.       ['Node: %o', ai.node],
  2376.     ].filter(Boolean));
  2377.     return {
  2378.       message,
  2379.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2380.       consoleArgs: m.map(([, v]) => v),
  2381.     };
  2382.   }
  2383.  
  2384.   static lazyGetRect(obj, node, selector) {
  2385.     return Object.defineProperty(obj, 'rect', {
  2386.       configurable: true,
  2387.       get() {
  2388.         const value = Util.rect(node, selector);
  2389.         Object.defineProperty(obj, 'rect', {value, configurable: true});
  2390.         return value;
  2391.       },
  2392.     });
  2393.   }
  2394.  
  2395.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2396.   static maybeDecodeUrl(url) {
  2397.     if (!url) return url;
  2398.     const iPct = url.indexOf('%');
  2399.     const iColon = url.indexOf(':');
  2400.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2401.       decodeURIComponent(url) :
  2402.       url;
  2403.   }
  2404.  
  2405.   static newFunction(...args) {
  2406.     try {
  2407.       return App.NOP || new Function(...args);
  2408.     } catch (e) {
  2409.       if (!e.message.includes('unsafe-eval'))
  2410.         throw e;
  2411.       App.NOP = () => {};
  2412.       return App.NOP;
  2413.     }
  2414.   }
  2415.  
  2416.   static rect(node, selector) {
  2417.     let n = selector && node.closest(selector);
  2418.     if (n) return n.getBoundingClientRect();
  2419.     const nested = node.getElementsByTagName('*');
  2420.     let maxArea = 0;
  2421.     let maxBounds;
  2422.     n = node;
  2423.     for (let i = 0; n; n = nested[i++]) {
  2424.       const bounds = n.getBoundingClientRect();
  2425.       const area = bounds.width * bounds.height;
  2426.       if (area > maxArea) {
  2427.         maxArea = area;
  2428.         maxBounds = bounds;
  2429.         node = n;
  2430.       }
  2431.     }
  2432.     return maxBounds;
  2433.   }
  2434.  
  2435.   static rel2abs(rel, abs = location.href) {
  2436.     try {
  2437.       return rel.startsWith('data:') ? rel :
  2438.         rel.startsWith('blob:') ? '' : // blobs don't work because they're usually revoked
  2439.           new URL(rel, abs).href;
  2440.     } catch (e) {
  2441.       return rel;
  2442.     }
  2443.   }
  2444.  
  2445.   static scaleCut(scale, i, arr) {
  2446.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  2447.   }
  2448.  
  2449.   static scaleNextToZoom(keepScale) {
  2450.     const z = ai.scaleZoom;
  2451.     return keepScale || z !== ai.scale ? z :
  2452.       z >= 1 ? ai.scales.find(x => x > z) :
  2453.         1;
  2454.   }
  2455.  
  2456.   static suppressHoverTooltip() {
  2457.     for (const node of [
  2458.       ai.node.parentNode,
  2459.       ai.node,
  2460.       ai.node.firstElementChild,
  2461.     ]) {
  2462.       const t = (node || 0).title;
  2463.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2464.         ai.tooltip = {node, text: t};
  2465.         node.title = '';
  2466.         break;
  2467.       }
  2468.     }
  2469.   }
  2470.  
  2471.   static tabFixUrl() {
  2472.     return `data:text/html;charset=utf8,
  2473.       <style>
  2474.         body {
  2475.           margin: 0;
  2476.           padding: 0;
  2477.           background: #222;
  2478.         }
  2479.         .fit {
  2480.           overflow: hidden
  2481.         }
  2482.         .fit > img {
  2483.           max-width: 100vw;
  2484.           max-height: 100vh;
  2485.         }
  2486.         body > img {
  2487.           margin: auto;
  2488.           position: absolute;
  2489.           left: 0;
  2490.           right: 0;
  2491.           top: 0;
  2492.           bottom: 0;
  2493.         }
  2494.       </style>
  2495.       <body class=fit>
  2496.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2497.       </body>
  2498.     `.replace(/\n\s*/g, '').replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2499.   }
  2500. }
  2501.  
  2502. function setup({rule} = {}) {
  2503.   const MPIV_BASE_URL = 'https://w9p.co/userscripts/mpiv/';
  2504.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2505.   let root = (elConfig || 0).shadowRoot;
  2506.   let {blankRuleElement} = setup;
  2507.   /** @type NodeList */
  2508.   const UI = new Proxy({}, {
  2509.     get(_, id) {
  2510.       return root.getElementById(id);
  2511.     },
  2512.   });
  2513.   if (!rule || !elConfig)
  2514.     init(new Config({save: true}));
  2515.   if (rule)
  2516.     installRule(rule);
  2517.  
  2518.   function closeSetup(event) {
  2519.     if (event && this.id !== 'x') {
  2520.       cfg = collectConfig({save: true, clone: this.id === 'apply'});
  2521.       Ruler.init();
  2522.       if (this.id === 'apply') {
  2523.         renderCustomScales(cfg);
  2524.         return;
  2525.       }
  2526.     }
  2527.     $remove(elConfig);
  2528.   }
  2529.  
  2530.   function collectConfig({save, clone} = {}) {
  2531.     const delay = parseInt(UI.delay.value);
  2532.     const scale = parseFloat(UI.scale.value.replace(',', '.'));
  2533.     let data = {
  2534.       css: UI.css.value.trim(),
  2535.       delay: !isNaN(delay) && delay >= 0 ? delay : undefined,
  2536.       fit: UI.fit.value || '',
  2537.       hosts: collectRules(),
  2538.       scale: !isNaN(scale) ? Math.max(1, scale) : undefined,
  2539.       scales: UI.scales.value
  2540.         .trim()
  2541.         .split(/[,;]*\s+/)
  2542.         .map(x => x.replace(',', '.'))
  2543.         .filter(x => !isNaN(parseFloat(x))),
  2544.       start: UI.start.value,
  2545.       zoom: UI.zoom.value,
  2546.       zoomOut: UI.zoomOut.value,
  2547.     };
  2548.     for (const el of $$('[type="checkbox"]', root))
  2549.       data[el.id] = el.checked;
  2550.     if (clone)
  2551.       data = JSON.parse(JSON.stringify(data));
  2552.     return new Config({data, save});
  2553.   }
  2554.  
  2555.   function collectRules() {
  2556.     return [...UI.rules.children]
  2557.       .map(el => [el.value.trim(), el[RULE]])
  2558.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2559.       .map(([s, json]) => json || s)
  2560.       .filter(Boolean);
  2561.   }
  2562.  
  2563.   function exportSettings(e) {
  2564.     dropEvent(e);
  2565.     const txt = $create('textarea', {
  2566.       style: 'opacity:0; position:absolute',
  2567.       value: JSON.stringify(collectConfig(), null, '  '),
  2568.     });
  2569.     root.appendChild(txt);
  2570.     txt.select();
  2571.     txt.focus();
  2572.     document.execCommand('copy');
  2573.     e.target.focus();
  2574.     txt.remove();
  2575.     UI.exportNotification.hidden = false;
  2576.     setTimeout(() => (UI.exportNotification.hidden = true), 1000);
  2577.   }
  2578.  
  2579.   function importSettings(e) {
  2580.     dropEvent(e);
  2581.     const s = prompt('Paste settings:');
  2582.     if (s)
  2583.       init(new Config({data: s}));
  2584.   }
  2585.  
  2586.   function checkRule({target: el}) {
  2587.     let json, error;
  2588.     const prev = el.previousElementSibling;
  2589.     if (el.value) {
  2590.       json = Ruler.parse(el.value);
  2591.       error = json instanceof Error && (json.message || String(json));
  2592.       if (!prev)
  2593.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2594.     } else if (prev) {
  2595.       prev.focus();
  2596.       el.remove();
  2597.     }
  2598.     el[RULE] = !error && json;
  2599.     el.title = error || '';
  2600.     el.setCustomValidity(error || '');
  2601.   }
  2602.  
  2603.   function focusRule({type, target: el, relatedTarget: from}) {
  2604.     if (el === this)
  2605.       return;
  2606.     if (type === 'paste') {
  2607.       setTimeout(() => focusRule.call(this, {target: el}));
  2608.       return;
  2609.     }
  2610.     if (el[RULE])
  2611.       el.value = Ruler.format(el[RULE], {expand: true});
  2612.     const h = clamp(el.scrollHeight, 15, elConfig.clientHeight / 4);
  2613.     if (h > el.offsetHeight)
  2614.       el.style.minHeight = h + 'px';
  2615.     if (!this.contains(from))
  2616.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2617.     if (from) {
  2618.       from.style.minHeight = '';
  2619.       if (from[RULE])
  2620.         from.value = Ruler.format(from[RULE]);
  2621.     }
  2622.   }
  2623.  
  2624.   function installRule(rule) {
  2625.     const inputs = UI.rules.children;
  2626.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2627.     if (!el) {
  2628.       el = inputs[0];
  2629.       el[RULE] = rule;
  2630.       el.value = Ruler.format(rule);
  2631.       el.hidden = false;
  2632.       const i = Math.max(0, collectRules().indexOf(rule));
  2633.       inputs[i].insertAdjacentElement('afterend', el);
  2634.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2635.     }
  2636.     const rect = el.getBoundingClientRect();
  2637.     if (rect.bottom < 0 ||
  2638.         rect.bottom > el.parentNode.offsetHeight)
  2639.       el.scrollIntoView();
  2640.     el.classList.add('highlight');
  2641.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2642.     el.focus();
  2643.   }
  2644.  
  2645.   function renderCustomScales(config) {
  2646.     UI.scales.value = config.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  2647.   }
  2648.  
  2649.   function init(config) {
  2650.     closeSetup();
  2651.     // preventing the main page from interpreting key presses in inputs as hotkeys
  2652.     // which may happen since it sees only the outer <div> in the event |target|
  2653.     elConfig = $create('div', {contentEditable: true});
  2654.     const scalesHint = 'Leave it empty and click Apply or Save to restore the default values.';
  2655.     const trimLeft = s => s.trim().replace(/\n\s+/g, '\n');
  2656.     root = elConfig.attachShadow({mode: 'open'});
  2657.     root.innerHTML = `
  2658. <style>
  2659.   :host {
  2660.     all: initial !important;
  2661.     position: fixed !important;
  2662.     z-index: 2147483647 !important;
  2663.     top: 20px !important;
  2664.     right: 20px !important;
  2665.     padding: 20px 30px !important;
  2666.     color: #000 !important;
  2667.     background: #eee !important;
  2668.     box-shadow: 5px 5px 25px 2px #000 !important;
  2669.     width: 500px !important;
  2670.     border: 1px solid black !important;
  2671.     display: flex !important;
  2672.     flex-direction: column !important;
  2673.   }
  2674.   main {
  2675.     font: 12px/15px sans-serif;
  2676.   }
  2677.   ul {
  2678.     max-height: calc(100vh - 200px);
  2679.     margin: 10px 0 15px 0;
  2680.     padding: 0;
  2681.     list-style: none;
  2682.   }
  2683.   li {
  2684.     margin: 0;
  2685.     padding: .25em 0;
  2686.   }
  2687.   li.options {
  2688.     display: flex;
  2689.     align-items: center;
  2690.     justify-content: space-between;
  2691.   }
  2692.   li.row {
  2693.     flex-wrap: wrap;
  2694.     justify-content: flex-start;
  2695.   }
  2696.   li.row label {
  2697.     flex-direction: row;
  2698.     align-items: center;
  2699.   }
  2700.   li.row input {
  2701.     margin-right: .25em;
  2702.   }
  2703.   label {
  2704.     display: inline-flex;
  2705.     flex-direction: column;
  2706.   }
  2707.   label:not(:last-child) {
  2708.     margin-right: 1em;
  2709.   }
  2710.   input, select {
  2711.     min-height: 1.6em;
  2712.     box-sizing: border-box;
  2713.   }
  2714.   input[type="checkbox"] {
  2715.     margin-left: 0;
  2716.   }
  2717.   input[type="number"] {
  2718.     width: 4em;
  2719.   }
  2720.   input:not([type="checkbox"])  {
  2721.     padding: 0 .25em;
  2722.   }
  2723.   textarea {
  2724.     flex: 1;
  2725.     resize: vertical;
  2726.     margin: 1px 0;
  2727.     font: 11px/1.25 Consolas, monospace;
  2728.   }
  2729.   textarea:invalid {
  2730.     background-color: #f002;
  2731.     border-color: #800;
  2732.   }
  2733.   code {
  2734.     font-weight: bold;
  2735.   }
  2736.   a {
  2737.     text-decoration: none;
  2738.   }
  2739.   a:hover {
  2740.     text-decoration: underline;
  2741.   }
  2742.   button {
  2743.     padding: .2em 1em;
  2744.     margin: 0 1em;
  2745.   }
  2746.   .column {
  2747.     display: flex;
  2748.     flex-direction: column;
  2749.   }
  2750.   .highlight {
  2751.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  2752.     animation-fill-mode: both;
  2753.   }
  2754.   #rules textarea {
  2755.     word-break: break-all;
  2756.   }
  2757.   #x {
  2758.     position: absolute;
  2759.     top: 0;
  2760.     right: 0;
  2761.     padding: 4px 8px;
  2762.     cursor: pointer;
  2763.     user-select: none;
  2764.   }
  2765.   #x:hover {
  2766.     background-color: #8884;
  2767.   }
  2768.   #cssApp {
  2769.     color: seagreen;
  2770.   }
  2771.   #exportNotification {
  2772.     color: green;
  2773.     font-weight: bold;
  2774.     position: absolute;
  2775.     left: 0;
  2776.     right: 0;
  2777.     bottom: 2px;
  2778.   }
  2779.   #installHint {
  2780.     color: green;
  2781.   }
  2782.   @keyframes fade-in {
  2783.     from { background-color: deepskyblue }
  2784.     to {}
  2785.   }
  2786.   @media (prefers-color-scheme: dark) {
  2787.     :host {
  2788.       color: #aaa !important;
  2789.       background: #333 !important;
  2790.     }
  2791.     a {
  2792.       color: deepskyblue;
  2793.     }
  2794.     textarea, input, select {
  2795.       background: #111;
  2796.       color: #BBB;
  2797.       border: 1px solid #555;
  2798.     }
  2799.     input[type="checkbox"] {
  2800.       filter: invert(1);
  2801.     }
  2802.     #cssApp {
  2803.       color: darkseagreen;
  2804.     }
  2805.     #installHint {
  2806.       color: greenyellow;
  2807.     }
  2808.   }
  2809. </style>
  2810. <main>
  2811.   <a href="${MPIV_BASE_URL}">${GM_info.script.name}</a>
  2812.   <div id=x>x</div>
  2813.   <ul class=column>
  2814.     <li class=options>
  2815.       <label>Popup shows on
  2816.         <select id=start>
  2817.           <option value=auto>automatically
  2818.           <option value=context>Right click / Ctrl
  2819.           <option value=ctrl>Ctrl
  2820.         </select>
  2821.       </label>
  2822.       <label>after, ms <input id=delay type=number min=0 max=10000 step=50 title=milliseconds></label>
  2823.       <label title="Activate only if the full version of the hovered image is that many times larger">
  2824.         if larger <input id=scale type=number min=1 max=100 step=.05>
  2825.       </label>
  2826.       <label>Zoom activates on
  2827.         <select id=zoom>
  2828.           <option value=context>Right click / Shift
  2829.           <option value=wheel>Wheel up / Shift
  2830.           <option value=shift>Shift
  2831.           <option value=auto>automatically
  2832.         </select>
  2833.       </label>
  2834.       <label>...and zooms to
  2835.         <select id=fit>
  2836.           <option value=all>fit to window
  2837.           <option value=large>fit if larger
  2838.           <option value=no>100%
  2839.           <option value="" title="Use custom scale factors">custom
  2840.         </select>
  2841.       </label>
  2842.     </li>
  2843.     <li class=options>
  2844.       <label>When fully zoomed out:
  2845.         <select id=zoomOut>
  2846.           <option value=stay>stay in zoom mode
  2847.           <option value=auto>stay if still hovered
  2848.           <option value=close>close popup
  2849.         </select>
  2850.       </label>
  2851.       <label style="flex: 1" title="${trimLeft(`
  2852.         0 = fit to window,
  2853.         0! = same as 0 but also removes smaller values,
  2854.         * after a value marks the default zoom factor, for example: 1*
  2855.         The popup won't shrink below the image's natural size or window size for bigger mages.
  2856.         ${scalesHint}
  2857.       `)}">Custom scale factors to use if “zooms to” is set to “custom”:
  2858.         <input id=scales placeholder="${scalesHint}">
  2859.       </label>
  2860.     </li>
  2861.     <li class="options row">
  2862.       <label><input type=checkbox id=center>Always centered</label>
  2863.       <label title="Disable only if you spoof the HTTP headers yourself">
  2864.         <input type=checkbox id=xhr>Anti-hotlinking workaround
  2865.       </label>
  2866.       <label><input type=checkbox id=preload>Start preloading immediately</label>
  2867.       <label><input type=checkbox id=imgtab>Run in image tabs</label>
  2868.       <label title="Don't enable unless you explicitly use it in your custom CSS">
  2869.         <input type=checkbox id=globalStatus>Expose status on &lt;html&gt; node (may cause slowdowns)
  2870.       </label>
  2871.     </li>
  2872.     <li>
  2873.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>
  2874.       e.g. <code>#mpiv-popup.mpiv-show { animation: none }</code>
  2875.       <a href="#" id=reveal style="float: right"
  2876.          title="You can copy parts of it to override them in your custom CSS">
  2877.          View the built-in CSS</a>
  2878.       <div class=column>
  2879.         <textarea id=css spellcheck=false></textarea>
  2880.         <textarea id=cssApp spellcheck=false hidden readonly rows=30></textarea>
  2881.       </div>
  2882.     </li>
  2883.     <li style="display: flex; justify-content: space-between;">
  2884.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  2885.       <div style="white-space: nowrap">
  2886.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  2887.         in "d" value, for example <code>"d": "!foo.com"</code>
  2888.       </div>
  2889.       <div>
  2890.         <input id=search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  2891.       </div>
  2892.     </li>
  2893.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  2894.       <div id=rules class=column>
  2895.         <textarea rows=1 spellcheck=false></textarea>
  2896.       </div>
  2897.     </li>
  2898.     <li>
  2899.       <div hidden id=installLoading>Loading...</div>
  2900.       <div hidden id=installHint>Double-click the rule (or select and press Enter) to add it.
  2901.         Click <code>Apply</code> or <code>Save</code> to confirm.</div>
  2902.       <a href="${MPIV_BASE_URL}more_host_rules.html" id=install>Install rule from repository...</a>
  2903.     </li>
  2904.   </ul>
  2905.   <div style="text-align:center">
  2906.     <button id=ok accesskey=s>Save</button>
  2907.     <button id=apply accesskey=a>Apply</button>
  2908.     <button id=import style="margin-right: 0">Import</button>
  2909.     <button id=export style="margin-left: 0">Export</button>
  2910.     <button id=cancel>Cancel</button>
  2911.     <div id=exportNotification hidden>Copied to clipboard.</div>
  2912.   </div>
  2913. </main>
  2914.     `;
  2915.     // rules
  2916.     const rules = UI.rules;
  2917.     rules.addEventListener('input', checkRule);
  2918.     rules.addEventListener('focusin', focusRule);
  2919.     rules.addEventListener('paste', focusRule);
  2920.     blankRuleElement =
  2921.       setup.blankRuleElement =
  2922.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2923.     for (const rule of config.hosts || []) {
  2924.       const el = blankRuleElement.cloneNode();
  2925.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2926.       rules.appendChild(el);
  2927.       checkRule({target: el});
  2928.     }
  2929.     // search rules
  2930.     const search = UI.search;
  2931.     search.oninput = () => {
  2932.       setup.search = search.value;
  2933.       const s = search.value.toLowerCase();
  2934.       for (const el of rules.children)
  2935.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2936.     };
  2937.     search.value = setup.search || '';
  2938.     if (search.value)
  2939.       search.oninput();
  2940.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2941.     // which may happen since it sees only the outer <div> in the event |target|
  2942.     root.addEventListener('keydown', e =>
  2943.       !e.altKey && !e.ctrlKey && !e.metaKey && e.stopPropagation(), true);
  2944.     UI.apply.onclick = UI.cancel.onclick = UI.ok.onclick = UI.x.onclick = closeSetup;
  2945.     UI.css.value = config.css;
  2946.     UI.delay.value = config.delay;
  2947.     UI.export.onclick = exportSettings;
  2948.     UI.fit.value = config.fit;
  2949.     UI.import.onclick = importSettings;
  2950.     UI.install.onclick = setupRuleInstaller;
  2951.     const {/** @type {HTMLTextAreaElement} */ cssApp} = UI;
  2952.     UI.reveal.onclick = e => {
  2953.       e.preventDefault();
  2954.       cssApp.hidden = !cssApp.hidden;
  2955.       if (!cssApp.hidden) {
  2956.         if (!cssApp.value) {
  2957.           App.updateStyles();
  2958.           cssApp.value = App.globalStyle.trim();
  2959.           cssApp.setSelectionRange(0, 0);
  2960.         }
  2961.         cssApp.focus();
  2962.       }
  2963.     };
  2964.     UI.scale.value = config.scale;
  2965.     UI.start.value = config.start;
  2966.     UI.start.onchange = function () {
  2967.       UI.delay.closest('label').hidden =
  2968.         UI.preload.closest('label').hidden =
  2969.           this.value !== 'auto';
  2970.     };
  2971.     UI.start.onchange();
  2972.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2973.     UI.zoom.value = config.zoom;
  2974.     UI.zoomOut.value = config.zoomOut;
  2975.     for (const el of $$('[type="checkbox"]', root))
  2976.       el.checked = config[el.id];
  2977.     for (const el of $$('a[href^="http"]', root)) {
  2978.       el.target = '_blank';
  2979.       el.rel = 'noreferrer noopener external';
  2980.     }
  2981.     renderCustomScales(config);
  2982.     doc.body.appendChild(elConfig);
  2983.     requestAnimationFrame(() => {
  2984.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2985.     });
  2986.   }
  2987. }
  2988.  
  2989. async function setupRuleInstaller(e) {
  2990.   dropEvent(e);
  2991.   const parent = this.parentElement;
  2992.   parent.children.installLoading.hidden = false;
  2993.   this.remove();
  2994.   let rules;
  2995.  
  2996.   try {
  2997.     rules = extractRules((await Remoting.getDoc(this.href)).doc);
  2998.     const selector = $create('select', {
  2999.       size: 8,
  3000.       style: 'width: 100%',
  3001.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3002.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3003.     });
  3004.     selector.append(...rules.map(renderRule));
  3005.     selector.selectedIndex = findMatchingRuleIndex();
  3006.     // remove "name" since the installed rules don't need it
  3007.     for (const r of rules)
  3008.       delete r.name;
  3009.     parent.children.installLoading.remove();
  3010.     parent.children.installHint.hidden = false;
  3011.     parent.appendChild(selector);
  3012.   } catch (e) {
  3013.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3014.   }
  3015.  
  3016.   function extractRules(doc) {
  3017.     const code = $('script', doc).textContent;
  3018.     // sort by name
  3019.     return JSON.parse(code.match(/var\s+rules\s*=\s*(\[.+]);?[\r\n]/)[1])
  3020.       .filter(r => !r.d || hostname.includes(r.d))
  3021.       .sort((a, b) =>
  3022.         (a = a.name.toLowerCase()) < (b = b.name.toLowerCase()) ? -1 :
  3023.           a > b ? 1 :
  3024.             0);
  3025.   }
  3026.  
  3027.   function findMatchingRuleIndex() {
  3028.     // get the core part of the current domain that's not "www", "m", etc.
  3029.     const h = hostname.split('.');
  3030.     const core = h[0] === 'www' || h.length > 2 && h[0].length === 1 ? h[1] : h[0];
  3031.     // find a rule matching the domain core
  3032.     return rules.findIndex(r =>
  3033.       r.name.toLowerCase().includes(core) ||
  3034.       r.d && hostname.includes(r.d));
  3035.   }
  3036.  
  3037.   function renderRule(r) {
  3038.     const {name, ...copy} = r;
  3039.     return $create('option', {
  3040.       textContent: name,
  3041.       title: Ruler.format(copy, {expand: true})
  3042.         .replace(/^{|\s*}$/g, '')
  3043.         .split('\n')
  3044.         .slice(0, 12)
  3045.         .map(renderTitleLine)
  3046.         .filter(Boolean)
  3047.         .join('\n'),
  3048.     });
  3049.   }
  3050.  
  3051.   function renderTitleLine(line, i, arr) {
  3052.     return (
  3053.       // show ... on 10th line if there are more lines
  3054.       i === 9 && arr.length > 10 ? '...' :
  3055.         i > 10 ? '' :
  3056.           // truncate to 100 chars
  3057.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3058.             // strip the leading space
  3059.             .replace(/^\s/, ''));
  3060.   }
  3061.  
  3062.   function maybeSetup(e) {
  3063.     if (!e.altKey && !e.ctrlKey && !e.shiftKey && !e.metaKey)
  3064.       setup({rule: rules[e.currentTarget.selectedIndex]});
  3065.   }
  3066. }
  3067.  
  3068. App.init();