☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

As of 2020-03-02. See the latest version.

  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     1.1.1
  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 = ['greatest.deepsurf.us', 'w9p.co', 'github.com'];
  35. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  36. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  37.  
  38. const PREFIX = 'mpiv-';
  39. const STATUS_ATTR = `${PREFIX}status`;
  40. const MSG = Object.assign({}, ...[
  41.   'getViewSize',
  42.   'viewSize',
  43. ].map(k => ({[k]: `${PREFIX}${k}`})));
  44. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  45. const PASSIVE = {passive: true};
  46. // time for volatile things to settle down meanwhile we postpone action
  47. // examples: loading image from cache, quickly moving mouse over one element to another
  48. const SETTLE_TIME = 50;
  49. // used to detect JS code in host rules
  50. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  51.  
  52. /** @type mpiv.Config */
  53. let cfg;
  54. /** @type mpiv.AppInfo */
  55. let ai = {rule: {}};
  56. /** @type Element */
  57. let elConfig;
  58.  
  59. const clamp = (v, min, max) => v < min ? min : v > max ? max : v;
  60. const compareNumbers = (a, b) => a - b;
  61. const dropEvent = e => (e.preventDefault(), e.stopPropagation());
  62. const ensureArray = v => Array.isArray(v) ? v : [v];
  63. const now = () => performance.now();
  64. const safeIncludes = (a, b) => typeof a === 'string' && a.includes(b);
  65. const sumProps = (...props) => props.reduce((sum, v) => sum + (parseFloat(v) || 0), 0);
  66. const tryCatch = function (fn, ...args) {
  67.   try {
  68.     return fn.apply(this, args);
  69.   } catch (e) {}
  70. };
  71.  
  72. const $ = (s, n = doc) => n.querySelector(s) || 0;
  73. const $$ = (s, n = doc) => n.querySelectorAll(s);
  74. const $create = (tag, props) => Object.assign(document.createElement(tag), props);
  75. const $many = (q, doc) => q && ensureArray(q).reduce((el, sel) => el || $(sel, doc), null);
  76. const $prop = (s, prop, n = doc) => (n.querySelector(s) || 0)[prop] || '';
  77. const $propUp = (n, prop) =>
  78.   (n = n.closest(`[${prop}]`)) && (prop.startsWith('data-') ? n.getAttribute(prop) : n[prop]) || '';
  79. const $remove = el => el && el.remove();
  80.  
  81. class App {
  82.  
  83.   static init() {
  84.     cfg = new Config({save: true});
  85.     App.isImageTab = doc.images.length === 1 &&
  86.                      doc.images[0].parentNode === doc.body &&
  87.                      !doc.links.length;
  88.     App.enabled = cfg.imgtab || !App.isImageTab;
  89.  
  90.     GM_registerMenuCommand('MPIV: configure', setup);
  91.     doc.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  92.  
  93.     if (isGoogleDomain && doc.getElementById('main'))
  94.       doc.getElementById('main').addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  95.  
  96.     if (installableSites.includes(hostname)) {
  97.       doc.addEventListener('click', e => {
  98.         if (hostname === 'github.com' && !location.pathname.startsWith('/tophf/mpiv/')) return;
  99.         const el = e.target.closest('blockquote, code, pre');
  100.         const text = el && el.textContent.trim();
  101.         let rule;
  102.         if (text && e.button === 0 &&
  103.             /^\s*{\s*"\w+"\s*:[\s\S]+}\s*$/.test(text) &&
  104.             (rule = tryCatch(JSON.parse, text))) {
  105.           setup({rule});
  106.           dropEvent(e);
  107.         }
  108.       });
  109.     }
  110.  
  111.     window.addEventListener('message', App.onMessageParent);
  112.   }
  113.  
  114.   /** @param {MessageEvent} e */
  115.   static onMessageParent(e) {
  116.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  117.       const [w, h] = Util.getFrameSize(e.source, window);
  118.       e.source.postMessage(`${MSG.viewSize}:${w}:${h}`, '*');
  119.     }
  120.   }
  121.  
  122.   /** @param {MessageEvent} e */
  123.   static onMessageChild(e) {
  124.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  125.       window.removeEventListener('message', App.onMessageChild);
  126.       const [w, h] = e.data.split(':').slice(1).map(parseFloat);
  127.       if (w && h) ai.view = {w, h};
  128.     }
  129.   }
  130.  
  131.   static activate(info, event) {
  132.     const {match, node, rule, url} = info;
  133.     const force = event.ctrlKey;
  134.     const scale = !force && Util.findScale(url, node.parentNode);
  135.     if (elConfig) console.info(Object.assign({node, rule, url, match}, scale && {scale}));
  136.     if (scale && scale < cfg.scale)
  137.       return;
  138.     if (ai.node)
  139.       App.deactivate();
  140.     ai = info;
  141.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  142.     Util.suppressHoverTooltip();
  143.     App.updateViewSize();
  144.     App.setListeners();
  145.     App.updateMouse(event);
  146.     if (force) {
  147.       Popup.start();
  148.     } else if (cfg.start === 'auto' && !rule.manual) {
  149.       Popup.schedule();
  150.     } else {
  151.       App.setStatus('ready');
  152.     }
  153.   }
  154.  
  155.   static checkProgress({start} = {}) {
  156.     const p = ai.popup;
  157.     if (p) {
  158.       ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && 800;
  159.       ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && 1200;
  160.       if (ai.nheight) {
  161.         App.updateProgress();
  162.         return;
  163.       }
  164.     }
  165.     if (start)
  166.       ai.timerProgress = setInterval(App.checkProgress, 150);
  167.   }
  168.  
  169.   static deactivate({wait} = {}) {
  170.     App.stopTimers();
  171.     if (ai.req)
  172.       tryCatch.call(ai.req, ai.req.abort);
  173.     if (ai.tooltip)
  174.       ai.tooltip.node.title = ai.tooltip.text;
  175.     App.setStatus(false);
  176.     App.setBar(false);
  177.     App.setListeners(false);
  178.     Popup.destroy();
  179.     if (wait) {
  180.       App.enabled = false;
  181.       setTimeout(App.enable, 200);
  182.     }
  183.     ai = {rule: {}};
  184.   }
  185.  
  186.   static enable() {
  187.     App.enabled = true;
  188.   }
  189.  
  190.   static handleError(e, rule = ai.rule) {
  191.     const fe = Util.formatError(e, rule);
  192.     if (!rule || !ai.urls || !ai.urls.length)
  193.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  194.     if (cfg.xhr && !ai.xhr && isGoogleImages) {
  195.       ai.xhr = true;
  196.       Popup.startSingle();
  197.     } else if (ai.urls && ai.urls.length) {
  198.       ai.url = ai.urls.shift();
  199.       if (ai.url) {
  200.         App.stopTimers();
  201.         Popup.startSingle();
  202.       } else {
  203.         App.deactivate();
  204.       }
  205.     } else if (ai.node) {
  206.       App.setStatus('error');
  207.       App.setBar(fe.message, 'error');
  208.     }
  209.   }
  210.  
  211.   static setBar(label, className) {
  212.     let b = ai.bar;
  213.     if (typeof label !== 'string') {
  214.       $remove(b);
  215.       ai.bar = null;
  216.       return;
  217.     }
  218.     if (!b)
  219.       b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  220.     App.updateStyles();
  221.     App.updateTitle();
  222.     App.updateBar();
  223.     b.innerHTML = label;
  224.     if (!b.parentNode) {
  225.       doc.body.appendChild(b);
  226.       Util.forceLayout(b);
  227.     }
  228.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  229.   }
  230.  
  231.   static setListeners(enable = true) {
  232.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  233.     const passive = enable ? PASSIVE : undefined;
  234.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  235.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  236.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  237.     onOff.call(doc, 'contextmenu', Events.onContext);
  238.     onOff.call(doc, 'keydown', Events.onKeyDown);
  239.     onOff.call(doc, 'keyup', Events.onKeyUp);
  240.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  241.   }
  242.  
  243.   static setStatus(status) {
  244.     if (!status && !cfg.globalStatus) {
  245.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  246.       return;
  247.     }
  248.     const prefix = cfg.globalStatus ? PREFIX : '';
  249.     const action = status && /^[+-]/.test(status) && status[0];
  250.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  251.     const el = cfg.globalStatus ? doc.documentElement :
  252.       name === 'edge' ? ai.popup :
  253.         ai.node;
  254.     if (!el) return;
  255.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  256.     const oldValue = (el.getAttribute(attr) || '').trim();
  257.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  258.     switch (action) {
  259.       case '-':
  260.         cls.delete(name);
  261.         break;
  262.       case false:
  263.         for (const c of cls)
  264.           if (c.startsWith(prefix) && c !== name)
  265.             cls.delete(c);
  266.         // fallthrough to +
  267.       case '+':
  268.         if (name)
  269.           cls.add(name);
  270.         break;
  271.     }
  272.     const newValue = [...cls].join(' ');
  273.     if (newValue !== oldValue)
  274.       el.setAttribute(attr, newValue);
  275.   }
  276.  
  277.   static setStatusLoading(force) {
  278.     if (!force) {
  279.       clearTimeout(ai.timerStatus);
  280.       ai.timerStatus = setTimeout(App.setStatusLoading, SETTLE_TIME, true);
  281.     } else if (!ai.popupLoaded) {
  282.       App.setStatus('+loading');
  283.     }
  284.   }
  285.  
  286.   static stopTimers() {
  287.     clearTimeout(ai.timer);
  288.     clearTimeout(ai.timerBar);
  289.     clearTimeout(ai.timerStatus);
  290.     clearInterval(ai.timerProgress);
  291.   }
  292.  
  293.   static updateBar() {
  294.     clearTimeout(ai.timerBar);
  295.     ai.bar.style.removeProperty('opacity');
  296.     ai.timerBar = setTimeout(() => ai.bar && ai.bar.style.setProperty('opacity', 0), 3000);
  297.   }
  298.  
  299.   static updateCaption(text, doc = document) {
  300.     switch (typeof ai.rule.c) {
  301.       case 'function':
  302.         // not specifying as a parameter's default value to get the html only when needed
  303.         if (text === undefined)
  304.           text = doc.documentElement.outerHTML;
  305.         ai.caption = ai.rule.c(text, doc, ai.node, ai.rule);
  306.         break;
  307.       case 'string': {
  308.         const el = $many(ai.rule.c, doc);
  309.         ai.caption = !el ? '' :
  310.           el.getAttribute('content') ||
  311.           el.getAttribute('title') ||
  312.           el.textContent;
  313.         break;
  314.       }
  315.       default:
  316.         ai.caption = (ai.tooltip || 0).text || ai.node.alt || $propUp(ai.node, 'title') ||
  317.                      Remoting.getFileName(ai.node.src || $propUp(ai.node, 'href'));
  318.     }
  319.   }
  320.  
  321.   static updateFileInfo() {
  322.     const gi = ai.gItems;
  323.     if (gi) {
  324.       const item = gi[ai.gIndex];
  325.       let c = gi.length > 1 ? '[' + (ai.gIndex + 1) + '/' + gi.length + '] ' : '';
  326.       if (ai.gIndex === 0 && gi.title && (!item.desc || !safeIncludes(item.desc, gi.title)))
  327.         c += gi.title + (item.desc ? ' - ' : '');
  328.       if (item.desc)
  329.         c += item.desc;
  330.       App.setBar(c.trim() || ' ', 'gallery', true);
  331.     } else if ('caption' in ai) {
  332.       App.setBar(ai.caption, 'caption');
  333.     } else if (ai.tooltip) {
  334.       App.setBar(ai.tooltip.text, 'tooltip');
  335.     } else {
  336.       App.setBar(' ', 'info');
  337.     }
  338.   }
  339.  
  340.   static updateMouse(e) {
  341.     const cx = ai.clientX = e.clientX;
  342.     const cy = ai.clientY = e.clientY;
  343.     const r = ai.rect;
  344.     if (r)
  345.       ai.isOverRect =
  346.         cx > r.left - 2 && cx < r.right + 2 &&
  347.         cy > r.top - 2 && cy < r.bottom + 2;
  348.   }
  349.  
  350.   static updateProgress() {
  351.     App.stopTimers();
  352.     let wait;
  353.     if (ai.preloadStart && (wait = ai.preloadStart + cfg.delay - now()) > 0) {
  354.       ai.timer = setTimeout(App.checkProgress, wait);
  355.       return;
  356.     }
  357.     if ((ai.urls || 0).length && Math.max(ai.nheight, ai.nwidth) < 130) {
  358.       App.handleError({type: 'error'});
  359.       return;
  360.     }
  361.     App.setStatus(false);
  362.     Util.forceLayout(ai.popup);
  363.     ai.popup.className = `${PREFIX}show`;
  364.     App.updateSpacing();
  365.     App.updateScales();
  366.     if (!(cfg.imgtab && App.isImageTab || cfg.zoom === 'auto') ||
  367.         App.zoomToggle({keepScale: true}) === undefined)
  368.       Popup.move();
  369.     App.updateTitle();
  370.     if (!ai.bar)
  371.       App.updateFileInfo();
  372.     ai.large = ai.nwidth > ai.popup.clientWidth + ai.mbw ||
  373.                ai.nheight > ai.popup.clientHeight + ai.mbh;
  374.     if (ai.large)
  375.       App.setStatus('large');
  376.   }
  377.  
  378.   static updateScales() {
  379.     const fit = Math.min(
  380.       (ai.view.w - ai.mbw - ai.outline * 2) / ai.nwidth,
  381.       (ai.view.h - ai.mbh - ai.outline * 2) / ai.nheight);
  382.     const isCustom = !cfg.fit;
  383.     const src = (isCustom && cfg.scales.length ? cfg : Config.DEFAULTS).scales;
  384.     const dst = isCustom ? [] : [fit];
  385.     let cutoff = Math.min(1, fit);
  386.     ai.scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  387.     ai.scale = cfg.zoom === 'auto' ? ai.scaleZoom : cutoff;
  388.     for (const scale of src) {
  389.       const val = parseFloat(scale) || fit;
  390.       dst.push(val);
  391.       if (isCustom && typeof scale === 'string') {
  392.         if (scale.includes('!')) cutoff = val;
  393.         if (scale.includes('*')) ai.scaleZoom = val;
  394.       }
  395.     }
  396.     ai.scales = dst.sort(compareNumbers).filter(Util.scaleCut, cutoff);
  397.   }
  398.  
  399.   static updateSpacing() {
  400.     const s = getComputedStyle(ai.popup);
  401.     ai.outline = sumProps(s.outlineOffset, s.outlineWidth);
  402.     ai.pw = sumProps(s.paddingLeft, s.paddingRight);
  403.     ai.ph = sumProps(s.paddingTop, s.paddingBottom);
  404.     ai.mbw = sumProps(s.marginLeft, s.marginRight, s.borderLeftWidth, s.borderRightWidth);
  405.     ai.mbh = sumProps(s.marginTop, s.marginBottom, s.borderTopWidth, s.borderBottomWidth);
  406.   }
  407.  
  408.   static updateStyles() {
  409.     let cssApp = App.globalStyle;
  410.     if (!cssApp) {
  411.       cssApp = App.globalStyle = /*language=CSS*/ (String.raw`
  412. #\mpiv-bar {
  413.   position: fixed;
  414.   z-index: 2147483647;
  415.   top: 0;
  416.   left: 0;
  417.   right: 0;
  418.   opacity: 0;
  419.   transition: opacity 1s ease .25s;
  420.   text-align: center;
  421.   font-family: sans-serif;
  422.   font-size: 15px;
  423.   font-weight: bold;
  424.   background: #0005;
  425.   color: white;
  426.   padding: 4px 10px;
  427.   text-shadow: .5px .5px 2px #000;
  428. }
  429. #\mpiv-bar.\mpiv-show {
  430.   opacity: 1;
  431. }
  432. #\mpiv-bar[data-zoom]::after {
  433.   content: " (" attr(data-zoom) ")";
  434.   opacity: .8;
  435. }
  436. #\mpiv-popup.\mpiv-show {
  437.   display: inline;
  438. }
  439. #\mpiv-popup {
  440.   display: none;
  441.   border: none !important;
  442.   box-sizing: content-box !important;
  443.   position: fixed !important;
  444.   z-index: 2147483647 !important;
  445.   margin: 0 !important;
  446.   top: 0 !important;
  447.   left: 0 !important;
  448.   width: auto !important;
  449.   height: auto !important;
  450.   transform-origin: top left !important;
  451.   max-width: none !important;
  452.   max-height: none !important;
  453.   cursor: none;
  454.   animation: .2s \mpiv-fadein both;
  455. }
  456. #\mpiv-popup.\mpiv-show {
  457.   box-shadow: 6px 6px 30px transparent;
  458.   transition: box-shadow .25s, background-color .25s;
  459. }
  460. #\mpiv-popup.\mpiv-show[loaded] {
  461.   box-shadow: 6px 6px 30px black;
  462.   background-color: white;
  463. }
  464. #\mpiv-popup.\mpiv-zoom-max {
  465.   image-rendering: pixelated;
  466. }
  467. @keyframes \mpiv-fadein {
  468.   from { opacity: 0; }
  469.   to { opacity: 1; }
  470. }
  471. ` + (cfg.globalStatus ? String.raw`
  472. .\mpiv-loading:not(.\mpiv-preloading) * {
  473.   cursor: wait !important;
  474. }
  475. .\mpiv-edge #\mpiv-popup {
  476.   cursor: default;
  477. }
  478. .\mpiv-error * {
  479.   cursor: not-allowed !important;
  480. }
  481. .\mpiv-ready *, .\mpiv-large * {
  482.   cursor: zoom-in !important;
  483. }
  484. .\mpiv-shift * {
  485.   cursor: default !important;
  486. }
  487. ` : String.raw`
  488. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]) {
  489.   cursor: wait !important;
  490. }
  491. #\mpiv-popup[\mpiv-status~="edge"] {
  492.   cursor: default !important;
  493. }
  494. [\mpiv-status~="error"] {
  495.   cursor: not-allowed !important;
  496. }
  497. [\mpiv-status~="ready"],
  498. [\mpiv-status~="large"] {
  499.   cursor: zoom-in !important;
  500. }
  501. [\mpiv-status~="shift"] {
  502.   cursor: default !important;
  503. }
  504. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  505.     }
  506.     const {css} = cfg;
  507.     Util.addStyle('global', cssApp + (css.includes('{') ? css : `#${PREFIX}-popup {${css}}`));
  508.     Util.addStyle('rule', ai.rule.css || '');
  509.   }
  510.  
  511.   static updateTitle() {
  512.     if (!ai.bar) return;
  513.     const zoom = ai.nwidth && `${
  514.       Math.round(ai.scale * 100)
  515.     }%, ${
  516.       ai.nwidth
  517.     } x ${
  518.       ai.nheight
  519.     } px, ${
  520.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  521.     } MP`.replace(/\x20/g, '\xA0');
  522.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  523.       if (zoom) ai.bar.dataset.zoom = zoom;
  524.       else delete ai.bar.dataset.zoom;
  525.       App.updateBar();
  526.     }
  527.   }
  528.  
  529.   static updateViewSize() {
  530.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  531.     ai.view = {
  532.       w: view.clientWidth,
  533.       h: view.clientHeight,
  534.     };
  535.     if (window === top) return;
  536.     const [w, h] = tryCatch(Util.getFrameSize, window, parent) || 0;
  537.     if (w && h) {
  538.       ai.view = {w, h};
  539.     } else {
  540.       window.addEventListener('message', App.onMessageChild);
  541.       parent.postMessage(MSG.getViewSize, '*');
  542.     }
  543.   }
  544.  
  545.   static zoomToggle({keepScale} = {}) {
  546.     const p = ai.popup;
  547.     if (!p || !ai.scales || ai.scales.length < 2)
  548.       return;
  549.     ai.zoom = !ai.zoom;
  550.     ai.zoomed = true;
  551.     ai.scale = ai.zoom && Util.scaleNextToZoom(keepScale) || ai.scales[0];
  552.     if (ai.zooming)
  553.       p.classList.add(`${PREFIX}zooming`);
  554.     Popup.move();
  555.     App.updateTitle();
  556.     App.setStatus(ai.zoom ? 'zoom' : false);
  557.     if (!ai.zoom)
  558.       App.updateFileInfo();
  559.     return ai.zoom;
  560.   }
  561.  
  562.   static zoomInOut(dir) {
  563.     const i = Util.findScaleIndex(dir);
  564.     const n = ai.scales.length;
  565.     if (i >= 0 && i < n)
  566.       ai.scale = ai.scales[i];
  567.     if (i <= 0 && cfg.zoomOut !== 'stay') {
  568.       if ((cfg.zoomOut === 'close' || !ai.isOverRect) && (!ai.gItems || ai.gItems.length < 2)) {
  569.         App.deactivate({wait: true});
  570.         return;
  571.       }
  572.       ai.zoom = cfg.zoomOut === 'auto';
  573.       ai.zoomed = false;
  574.       App.updateFileInfo();
  575.     } else {
  576.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  577.     }
  578.     if (ai.zooming)
  579.       ai.popup.classList.add(`${PREFIX}zooming`);
  580.     Popup.move();
  581.     App.updateTitle();
  582.   }
  583. }
  584.  
  585. class Config {
  586.   constructor({data: c = GM_getValue('cfg'), save}) {
  587.     if (typeof c === 'string')
  588.       c = tryCatch(JSON.parse, c);
  589.     if (typeof c !== 'object' || !c)
  590.       c = {};
  591.     const {DEFAULTS} = Config;
  592.     if (c.version !== DEFAULTS.version) {
  593.       if (typeof c.hosts === 'string')
  594.         c.hosts = c.hosts.split('\n')
  595.           .map(s => tryCatch(JSON.parse, s) || s)
  596.           .filter(Boolean);
  597.       if (c.close === true || c.close === false)
  598.         c.zoomOut = c.close ? 'auto' : 'stay';
  599.       for (const key in DEFAULTS)
  600.         if (typeof c[key] !== typeof DEFAULTS[key])
  601.           c[key] = DEFAULTS[key];
  602.       if (c.version === 3 && c.scales[0] === 0)
  603.         c.scales[0] = '0!';
  604.       for (const key in c)
  605.         if (!(key in DEFAULTS))
  606.           delete c[key];
  607.       c.version = DEFAULTS.version;
  608.       if (save)
  609.         GM_setValue('cfg', JSON.stringify(c));
  610.     }
  611.     if (cfg && (
  612.       cfg.css !== c.css ||
  613.       cfg.globalStatus !== c.globalStatus
  614.     )) {
  615.       App.globalStyle = '';
  616.     }
  617.     if (!Array.isArray(c.scales)) c.scales = [];
  618.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  619.     c.fit = ['all', 'large', 'no'].includes(c.fit) ? c.fit :
  620.       !c.scales.length || `${c.scales}` === `${Config.DEFAULTS.scales}` ? 'large' :
  621.         '';
  622.     Object.assign(this, c);
  623.   }
  624. }
  625.  
  626. /** @type mpiv.Config */
  627. Config.DEFAULTS = Object.assign(Object.create(null), {
  628.   center: false,
  629.   css: '',
  630.   delay: 500,
  631.   fit: '',
  632.   globalStatus: false,
  633.   // prefer ' inside rules because " will be displayed as \"
  634.   // example: "img[src*='icon']"
  635.   hosts: [{
  636.     name: 'No popup for YouTube thumbnails',
  637.     d: 'www.youtube.com',
  638.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  639.     s: '',
  640.   }, {
  641.     name: 'No popup for SVG/PNG icons',
  642.     d: '',
  643.     e: "img[src*='icon']",
  644.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  645.     s: '',
  646.   }],
  647.   imgtab: false,
  648.   preload: false,
  649.   scale: 1.25,
  650.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  651.   start: 'auto',
  652.   version: 6,
  653.   xhr: true,
  654.   zoom: 'context',
  655.   zoomOut: 'auto',
  656. });
  657.  
  658. class Ruler {
  659. /*
  660.  'u' works only with URLs so it's ignored if 'html' is true
  661.    ||some.domain = matches some.domain, anything.some.domain, etc.
  662.    |foo = url or text must start with foo
  663.    ^ = separator like / or ? or : but not a letter/number, not %._-
  664.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  665.  'r' is checked only if 'u' matches first
  666. */
  667.   static init() {
  668.     const errors = new Map();
  669.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  670.     for (const rule of errors.keys())
  671.       App.handleError('Invalid custom host rule:', rule);
  672.  
  673.     // rules that disable previewing
  674.     const disablers = [
  675.       dotDomain.endsWith('.stackoverflow.com') && {
  676.         e: '.post-tag, .post-tag img',
  677.         s: '',
  678.       },
  679.       {
  680.         u: '||disqus.com/',
  681.         s: '',
  682.       },
  683.     ];
  684.  
  685.     // optimization: a rule is created only when on domain
  686.     const perDomain = [
  687.       hostname.includes('startpage') && {
  688.         r: /\boiu=(.+)/,
  689.         s: '$1',
  690.         follow: true,
  691.       },
  692.       dotDomain.endsWith('.4chan.org') && {
  693.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  694.         q: '.op .fileText a',
  695.         css: '#post-preview{display:none}',
  696.       },
  697.       hostname.includes('amazon.') && {
  698.         r: /.+?images\/I\/.+?\./,
  699.         s: m => {
  700.           const uh = doc.getElementById('universal-hover');
  701.           return uh ? '' : m[0] + 'jpg';
  702.         },
  703.         css: '#zoomWindow{display:none!important;}',
  704.       },
  705.       dotDomain.endsWith('.bing.com') && {
  706.         e: 'a[m*="murl"]',
  707.         r: /murl&quot;:&quot;(.+?)&quot;/,
  708.         s: '$1',
  709.         html: true,
  710.       },
  711.       dotDomain.endsWith('.deviantart.com') && {
  712.         e: '[data-super-full-img] *, img[src*="/th/"]',
  713.         s: (m, node) =>
  714.           $propUp(node, 'data-super-full-img') ||
  715.           (node = node.dataset.embedId && node.nextElementSibling) &&
  716.           node.dataset.embedId && node.src,
  717.       },
  718.       dotDomain.endsWith('.deviantart.com') && {
  719.         e: '.dev-view-deviation img',
  720.         s: () => [
  721.           $('.dev-page-download').href,
  722.           $('.dev-content-full').src,
  723.         ].filter(Boolean),
  724.       },
  725.       dotDomain.endsWith('.deviantart.com') && {
  726.         u: ',strp/',
  727.         s: '/\\/v1\\/.*//',
  728.       },
  729.       dotDomain.endsWith('.dropbox.com') && {
  730.         r: /(.+?&size_mode)=\d+(.*)/,
  731.         s: '$1=5$2',
  732.       },
  733.       dotDomain.endsWith('.facebook.com') && {
  734.         e: 'a[href*="ref=hovercard"]',
  735.         s: (m, node) =>
  736.           'https://www.facebook.com/photo.php?fbid=' +
  737.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  738.         follow: true,
  739.       },
  740.       dotDomain.endsWith('.facebook.com') && {
  741.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  742.         s: (m, node) =>
  743.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  744.             decodeURIComponent(m[4]),
  745.         html: true,
  746.         follow: true,
  747.       },
  748.       dotDomain.endsWith('.flickr.com') &&
  749.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  750.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  751.         s: m => `https://www.flickr.com/services/rest/?${
  752.           new URLSearchParams({
  753.             photo_id: m[1],
  754.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  755.             method: 'flickr.photos.getSizes',
  756.             format: 'json',
  757.             nojsoncallback: 1,
  758.           }).toString()}`,
  759.         q: text => JSON.parse(text).sizes.size.pop().source,
  760.       },
  761.       dotDomain.endsWith('.github.com') && {
  762.         r: new RegExp([
  763.           /(avatars.+?&s=)\d+/,
  764.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  765.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  766.         ].map(rx => rx.source).join('|')),
  767.         s: m => `https://${
  768.           m[1] ? `${m[1]}460` :
  769.             m[2] ? `${m[2]}usercontent${m[3]}` :
  770.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  771.         }`,
  772.       },
  773.       isGoogleImages && {
  774.         e: 'a',
  775.         r: /imgres\?imgurl=([^&]+)/,
  776.         s: '$1',
  777.       },
  778.       isGoogleImages && {
  779.         e: '[data-tbnid] a',
  780.         s: (m, node, rule) => {
  781.           const id = $propUp(node, 'data-tbnid');
  782.           for (const {text} of $$('script', doc)) {
  783.             let i = text.indexOf(id);
  784.             if (i < 0) continue;
  785.             i = text.indexOf('[', i + id.length + 9) + 2;
  786.             const url = text.slice(i, text.indexOf('"', i + 1));
  787.             if (!url.startsWith('http')) continue;
  788.             rule.xhr = !url.startsWith(location.protocol);
  789.             return url;
  790.           }
  791.         },
  792.       },
  793.       dotDomain.endsWith('.instagram.com') && {
  794.         e: [
  795.           'a[href*="/p/"]',
  796.           'a[role="button"][data-reactid*="scontent-"]',
  797.           'article div',
  798.           'article div div img',
  799.         ],
  800.         s: (m, node, rule) => {
  801.           const {a = false, data = false, src} = rule._getData(node);
  802.           rule.q = data.is_video && !data.video_url && 'meta[property="og:video"]';
  803.           rule.g = a && $('[class*="Carousel"]', a) && rule._g;
  804.           rule.follow = !data && !rule.g;
  805.           return (
  806.             !a && !src ? false :
  807.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  808.                 data.video_url || data.display_url);
  809.         },
  810.         c: (html, doc, node, rule) => {
  811.           const {data, img} = rule._getData(node);
  812.           return tryCatch(rule._getCaption, data) || img && img.alt || '';
  813.         },
  814.         anonymous: true,
  815.         follow: true,
  816.         _g(text, doc, url, m, rule) {
  817.           const media = JSON.parse(text).graphql.shortcode_media;
  818.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  819.             url: e.node.video_url || e.node.display_url,
  820.             desc: e.node.accessibility_caption || '',
  821.           }));
  822.           items.title = tryCatch(rule._getCaption, media) || '';
  823.           return items;
  824.         },
  825.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  826.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  827.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  828.         _getData(node) {
  829.           if (location.pathname.startsWith('/p/')) {
  830.             const img = $('img[srcset], video', node.parentNode);
  831.             if (img && (img.currentSrc || parseFloat(img.sizes) > 900))
  832.               return {img, src: (img.srcset || img.currentSrc).split(',').pop().split(' ')[0]};
  833.           }
  834.           const n = node.closest('a[href*="/p/"], article');
  835.           const a = n && (n.tagName === 'A' ? n : $('a[href*="/p/"]', n));
  836.           const data = a && tryCatch(this._getEdge, a.pathname.split('/')[2]);
  837.           return {a, data};
  838.         },
  839.       },
  840.       ...dotDomain.endsWith('.reddit.com') && [{
  841.         u: '||i.reddituploads.com/',
  842.       }, {
  843.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  844.         s: (m, node) => $propUp(node, 'data-url'),
  845.       }, {
  846.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  847.         s: 'https://i$1',
  848.       }] || [],
  849.       dotDomain.endsWith('.tumblr.com') && {
  850.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  851.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  852.         follow: true,
  853.       },
  854.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  855.         e: 'a.media-item, a.js-media-image-link',
  856.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  857.         follow: true,
  858.       },
  859.       dotDomain.endsWith('.twitter.com') && {
  860.         e: '.grid-tweet > .media-overlay',
  861.         s: (m, node) => node.previousElementSibling.src,
  862.         follow: true,
  863.       },
  864.     ];
  865.  
  866.     const main = [
  867.       {
  868.         r: /[/?=](https?[^&]+)/,
  869.         s: '$1',
  870.         follow: true,
  871.       },
  872.       {
  873.         u: [
  874.           '||500px.com/photo/',
  875.           '||cl.ly/',
  876.           '||cweb-pix.com/',
  877.           '||ibb.co/',
  878.           '||imgcredit.xyz/image/',
  879.         ],
  880.         r: /\.\w+\/.+/,
  881.         q: 'meta[property="og:image"]',
  882.       },
  883.       {
  884.         u: 'attachment.php',
  885.         r: /attachment\.php.+attachmentid/,
  886.       },
  887.       {
  888.         u: '||abload.de/image',
  889.         q: '#image',
  890.       },
  891.       {
  892.         u: '||deviantart.com/art/',
  893.         s: (m, node) =>
  894.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  895.             '' :
  896.             m.input,
  897.         q: [
  898.           '#download-button[href*=".jpg"]',
  899.           '#download-button[href*=".jpeg"]',
  900.           '#download-button[href*=".gif"]',
  901.           '#download-button[href*=".png"]',
  902.           '#gmi-ResViewSizer_fullimg',
  903.           'img.dev-content-full',
  904.         ],
  905.       },
  906.       {
  907.         u: '||dropbox.com/s',
  908.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  909.         q: (text, doc) =>
  910.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  911.       },
  912.       {
  913.         r: /[./]ebay\.[^/]+\/itm\//,
  914.         q: text =>
  915.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  916.             .replace(/~~60_\d+/, '~~60_57'),
  917.       },
  918.       {
  919.         u: '||i.ebayimg.com/',
  920.         s: (m, node) =>
  921.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  922.             m.input.replace(/~~60_\d+/, '~~60_57'),
  923.       },
  924.       {
  925.         u: [
  926.           '||fastpic.ru/big',
  927.           '||fastpic.ru/thumb',
  928.         ],
  929.         r: /\/\/(?:i(\d+)\.)?([^/]+\/)(big|thumb|view)\/([^.]+?)\.(\w+)/,
  930.         s: (m, node, rule) => {
  931.           const a = node.closest('[href*="fastpic.ru"]');
  932.           const am = a && rule.r.exec(decodeURIComponent(a.href)) || [];
  933.           const p = a && am[4].split('/');
  934.           return `https://i${am[1] || m[1] || am[3] === 'view' && p[0]}.${m[2]}big/${
  935.             am[3] === 'big' ? am[4] : m[4]}.${am[5] || m[5]}?noht=1`;
  936.         },
  937.         xhr: () => 'https://fastpic.ru',
  938.       },
  939.       {
  940.         u: '||fastpic.ru/view/',
  941.         q: 'img[src*="/big/"]',
  942.         xhr: true,
  943.       },
  944.       {
  945.         u: '||facebook.com/',
  946.         r: /photo\.php|[^/]+\/photos\//,
  947.         s: (m, node) =>
  948.           node.id === 'fbPhotoImage' ? false :
  949.             /gradient\.png$/.test(m.input) ? '' :
  950.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  951.         q: [
  952.           'div + span > a:first-child:not([href*="tag_faces"])',
  953.           'div + span > a[href*="tag_faces"] ~ a',
  954.         ],
  955.         rect: '#fbProfileCover',
  956.       },
  957.       {
  958.         u: '||fbcdn.',
  959.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  960.         s: m =>
  961.           dotDomain.endsWith('.facebook.com') &&
  962.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  963.           false,
  964.         manual: true,
  965.       },
  966.       {
  967.         u: ['||fbcdn-', 'fbcdn.net/'],
  968.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  969.         s: (m, node) => {
  970.           if (node.id === 'fbPhotoImage') {
  971.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  972.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  973.           }
  974.           if (m[4])
  975.             return false;
  976.           const pn = node.parentNode;
  977.           if (pn.outerHTML.includes('/hovercard/'))
  978.             return '';
  979.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  980.             return false;
  981.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  982.         },
  983.         rect: '.photoWrap',
  984.       },
  985.       {
  986.         u: '||flickr.com/photos/',
  987.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  988.         s: m =>
  989.           m.input.indexOf('/sizes/') < 0 ?
  990.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  991.             false,
  992.         q: (text, doc) => {
  993.           const links = $$('.sizes-list a', doc);
  994.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  995.         },
  996.         follow: true,
  997.       },
  998.       {
  999.         u: '||flickr.com/photos/',
  1000.         r: /\/sizes\//,
  1001.         q: '#allsizes-photo > img',
  1002.       },
  1003.       {
  1004.         u: '||gfycat.com/',
  1005.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1006.         s: 'https://$1$3',
  1007.         q: [
  1008.           'meta[content$=".webm"]',
  1009.           '#webmsource',
  1010.           'source[src$=".webm"]',
  1011.         ],
  1012.       },
  1013.       {
  1014.         u: [
  1015.           '||googleusercontent.com/proxy',
  1016.           '||googleusercontent.com/gadgets/proxy',
  1017.         ],
  1018.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1019.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1020.       },
  1021.       {
  1022.         u: [
  1023.           '||googleusercontent.com/',
  1024.           '||ggpht.com/',
  1025.         ],
  1026.         s: (m, node) =>
  1027.           m.input.includes('webcache.') ||
  1028.           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/) ||
  1029.           node.matches('.g-hovercard *, a[href*="profile_redirector"] > img') ?
  1030.             '' :
  1031.             m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1032.               .replace(/=[-\w]+([&#].*|$)/, ''),
  1033.       },
  1034.       {
  1035.         u: '||gravatar.com/',
  1036.         r: /([a-z0-9]{32})/,
  1037.         s: 'https://gravatar.com/avatar/$1?s=200',
  1038.       },
  1039.       {
  1040.         u: '//gyazo.com/',
  1041.         r: /\.com\/\w{32,}/,
  1042.         q: 'meta[name="twitter:image"]',
  1043.         xhr: true,
  1044.       },
  1045.       {
  1046.         u: '||hostingkartinok.com/show-image.php',
  1047.         q: '.image img',
  1048.       },
  1049.       {
  1050.         u: [
  1051.           '||imagecurl.com/images/',
  1052.           '||imagecurl.com/viewer.php',
  1053.         ],
  1054.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1055.         s: 'https://imagecurl.com/images/$1$2$3',
  1056.       },
  1057.       {
  1058.         u: '||imagebam.com/image/',
  1059.         q: 'meta[property="og:image"]',
  1060.         tabfix: true,
  1061.         xhr: hostname.includes('planetsuzy'),
  1062.       },
  1063.       {
  1064.         u: '||imageban.ru/thumbs',
  1065.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1066.         s: '$1out$2/$3/$4',
  1067.       },
  1068.       {
  1069.         u: [
  1070.           '||imageban.ru/show',
  1071.           '||imageban.net/show',
  1072.           '||ibn.im/',
  1073.         ],
  1074.         q: '#img_main',
  1075.       },
  1076.       {
  1077.         u: '||imageshack.us/img',
  1078.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1079.         s: 'https://$2/download/$1/$3$4',
  1080.       },
  1081.       {
  1082.         u: '||imageshack.us/i/',
  1083.         q: '#share-dl',
  1084.       },
  1085.       {
  1086.         u: '||imageteam.org/img',
  1087.         q: 'img[alt="image"]',
  1088.       },
  1089.       {
  1090.         u: [
  1091.           '||imagetwist.com/',
  1092.           '||imageshimage.com/',
  1093.         ],
  1094.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1095.         q: 'img.pic',
  1096.         xhr: true,
  1097.       },
  1098.       {
  1099.         u: '||imageupper.com/i/',
  1100.         q: '#img',
  1101.         xhr: true,
  1102.       },
  1103.       {
  1104.         u: '||imagevenue.com/img.php',
  1105.         q: '#thepic',
  1106.       },
  1107.       {
  1108.         u: '||imagezilla.net/show/',
  1109.         q: '#photo',
  1110.         xhr: true,
  1111.       },
  1112.       {
  1113.         u: [
  1114.           '||images-na.ssl-images-amazon.com/images/',
  1115.           '||media-imdb.com/images/',
  1116.         ],
  1117.         r: /images\/.+?\.jpg/,
  1118.         s: '/V1\\.?_.+?\\.//g',
  1119.       },
  1120.       {
  1121.         u: '||imgbox.com/',
  1122.         r: /\.com\/([a-z0-9]+)$/i,
  1123.         q: '#img',
  1124.         xhr: hostname !== 'imgbox.com',
  1125.       },
  1126.       {
  1127.         u: '||imgclick.net/',
  1128.         r: /\.net\/(\w+)/,
  1129.         q: 'img.pic',
  1130.         xhr: true,
  1131.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1132.       },
  1133.       {
  1134.         u: [
  1135.           '||imgflip.com/i/',
  1136.           '||imgflip.com/gif/',
  1137.         ],
  1138.         r: /\/(i|gif)\/([^/?#]+)/,
  1139.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1140.       },
  1141.       {
  1142.         u: [
  1143.           '||imgur.com/a/',
  1144.           '||imgur.com/gallery/',
  1145.           '||imgur.com/t/',
  1146.         ],
  1147.         g: async (text, doc, url, m, rule, cb) => {
  1148.           // simplified extraction of JSON as it occupies only one line
  1149.           if (!/(?:mergeConfig\('gallery',\s*|Imgur\.Album\.getInstance\()[\s\S]*?[,\s{"'](?:image|album)\s*:\s*({[^\r\n]+?}),?[\r\n]/.test(text))
  1150.             return;
  1151.           const info = JSON.parse(RegExp.$1);
  1152.           let images = info.is_album ? info.album_images.images : [info];
  1153.           if (info.num_images > images.length) {
  1154.             const url = `https://imgur.com/ajaxalbums/getimages/${info.hash}/hit.json?all=true`;
  1155.             images = JSON.parse((await Remoting.gmXhr(url)).responseText).data.images;
  1156.           }
  1157.           const items = [];
  1158.           for (const img of images || []) {
  1159.             const u = `https://i.imgur.com/${img.hash}`;
  1160.             items.push({
  1161.               url: img.ext === '.gif' && img.animated !== false ?
  1162.                 [`${u}.webm`, `${u}.mp4`, u] :
  1163.                 u + img.ext,
  1164.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1165.             });
  1166.           }
  1167.           if (images && info.is_album && !safeIncludes(items[0].desc, info.title))
  1168.             items.title = info.title;
  1169.           cb(items);
  1170.         },
  1171.         css: '.post > .hover { display:none!important; }',
  1172.       },
  1173.       {
  1174.         u: '||imgur.com/',
  1175.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1176.         s: 'gallery',
  1177.         g: (text, doc, url, m) =>
  1178.           m[2].split(',').map(id => ({
  1179.             url: `https://i.${m[1]}${id}.jpg`,
  1180.           })),
  1181.       },
  1182.       {
  1183.         u: '||imgur.com/',
  1184.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.([a-z]+))/i,
  1185.         s: (m, node) => {
  1186.           if (/memegen|random|register|search|signin/.test(m.input))
  1187.             return '';
  1188.           const a = node.closest('a');
  1189.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1190.             return false;
  1191.           const id = m[3].replace(/(.{7})[bhm]$/, '$1');
  1192.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1193.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1194.           return ext === 'webm' ?
  1195.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1196.             u + ext;
  1197.         },
  1198.       },
  1199.       {
  1200.         u: [
  1201.           '||instagr.am/p/',
  1202.           '||instagram.com/p/',
  1203.         ],
  1204.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1205.         q: text => {
  1206.           const m = JSON.parse(text).graphql.shortcode_media;
  1207.           return m.video_url || m.display_url;
  1208.         },
  1209.         rect: 'div.PhotoGridMediaItem',
  1210.         c: text => {
  1211.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1212.           return m === undefined ? '(no caption)' : m.node.text;
  1213.         },
  1214.       },
  1215.       {
  1216.         u: [
  1217.           '||livememe.com/',
  1218.           '||lvme.me/',
  1219.         ],
  1220.         r: /\.\w+\/([^.]+)$/,
  1221.         s: 'http://i.lvme.me/$1.jpg',
  1222.       },
  1223.       {
  1224.         u: '||lostpic.net/image',
  1225.         q: '.image-viewer-image img',
  1226.       },
  1227.       {
  1228.         u: '||makeameme.org/meme/',
  1229.         r: /\/meme\/([^/?#]+)/,
  1230.         s: 'https://media.makeameme.org/created/$1.jpg',
  1231.       },
  1232.       {
  1233.         u: '||photobucket.com/',
  1234.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1235.         s: 'https://i$1$3',
  1236.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1237.       },
  1238.       {
  1239.         u: '||piccy.info/view3/',
  1240.         r: /(.+?\/view3)\/(.*)\//,
  1241.         s: '$1/$2/orig/',
  1242.         q: '#mainim',
  1243.       },
  1244.       {
  1245.         u: '||pimpandhost.com/image/',
  1246.         r: /(.+?\/image\/[0-9]+)/,
  1247.         s: '$1?size=original',
  1248.         q: 'img.original',
  1249.       },
  1250.       {
  1251.         u: [
  1252.           '||pixroute.com/',
  1253.           '||imgspice.com/',
  1254.         ],
  1255.         r: /\.html$/,
  1256.         q: 'img[id]',
  1257.         xhr: true,
  1258.       },
  1259.       {
  1260.         u: '||postima',
  1261.         r: /postima?ge?\.org\/image\/\w+/,
  1262.         q: [
  1263.           'a[href*="dl="]',
  1264.           '#main-image',
  1265.         ],
  1266.       },
  1267.       {
  1268.         u: [
  1269.           '||prntscr.com/',
  1270.           '||prnt.sc/',
  1271.         ],
  1272.         r: /\.\w+\/.+/,
  1273.         q: 'meta[property="og:image"]',
  1274.         xhr: true,
  1275.       },
  1276.       {
  1277.         u: '||radikal.ru/',
  1278.         r: /\.ru\/(fp|.+\.html)/,
  1279.         q: text => text.match(/http:\/\/[a-z0-9]+\.radikal\.ru[a-z0-9/]+\.(jpg|gif|png)/i)[0],
  1280.       },
  1281.       {
  1282.         u: '||tumblr.com',
  1283.         r: /_500\.jpg/,
  1284.         s: ['/_500/_1280/', ''],
  1285.       },
  1286.       {
  1287.         u: '||twimg.com/',
  1288.         r: /\/profile_images/i,
  1289.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1290.       },
  1291.       {
  1292.         u: '||twimg.com/media/',
  1293.         r: /.+?format=(jpe?g|png|gif)/i,
  1294.         s: '$0&name=large',
  1295.       },
  1296.       {
  1297.         u: '||twimg.com/1/proxy',
  1298.         r: /t=([^&_]+)/i,
  1299.         s: m => atob(m[1]).match(/http.+/),
  1300.       },
  1301.       {
  1302.         u: '||pic.twitter.com/',
  1303.         r: /\.com\/[a-z0-9]+/i,
  1304.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1305.         follow: true,
  1306.       },
  1307.       {
  1308.         u: '||twitpic.com/',
  1309.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1310.         s: 'https://twitpic.com/show/large/$2',
  1311.       },
  1312.       {
  1313.         u: '||upix.me/files',
  1314.         s: '/#//',
  1315.       },
  1316.       {
  1317.         u: '||wiki',
  1318.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1319.         s: '/\\/thumb(?=\\/)|' +
  1320.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1321.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1322.         xhr: !hostname.includes('wiki'),
  1323.       },
  1324.       {
  1325.         u: '||ytimg.com/vi/',
  1326.         r: /(.+?\/vi\/[^/]+)/,
  1327.         s: '$1/0.jpg',
  1328.         rect: '.video-list-item',
  1329.       },
  1330.       {
  1331.         u: '/viewer.php?file=',
  1332.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1333.         s: '$1/images/$2',
  1334.         xhr: true,
  1335.       },
  1336.       {
  1337.         u: '/thumb_',
  1338.         r: /\/albums.+\/thumb_[^/]/,
  1339.         s: '/thumb_//',
  1340.       },
  1341.       {
  1342.         u: [
  1343.           '.th.jp',
  1344.           '.th.gif',
  1345.           '.th.png',
  1346.         ],
  1347.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1348.         s: '$1$2',
  1349.         follow: true,
  1350.       },
  1351.       {
  1352.         r: /^[^?]+?\.(bmp|jpe?g?|gif|mp4|png|svg|webm)($|\?)/i,
  1353.       },
  1354.     ];
  1355.  
  1356.     /** @type mpiv.HostRule[] */
  1357.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1358.   }
  1359.  
  1360.   static format(rule, {expand} = {}) {
  1361.     const s = JSON.stringify(rule, null, ' ');
  1362.     return expand ?
  1363.       /* {"a": ...,
  1364.           "b": ...,
  1365.           "c": ...
  1366.          } */
  1367.       s.replace(/^{\s+/g, '{') :
  1368.       /* {"a": ..., "b": ..., "c": ...} */
  1369.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1370.   }
  1371.  
  1372.   /** @returns mpiv.HostRule | Error | false | undefined */
  1373.   static parse(rule) {
  1374.     const isBatchOp = this instanceof Map;
  1375.     try {
  1376.       if (typeof rule === 'string')
  1377.         rule = JSON.parse(rule);
  1378.       if ('d' in rule && typeof rule.d !== 'string')
  1379.         rule.d = undefined;
  1380.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1381.         return false;
  1382.       const compileTo = isBatchOp ? rule : {};
  1383.       if (rule.r)
  1384.         compileTo.r = new RegExp(rule.r, 'i');
  1385.       if (RX_HAS_CODE.test(rule.s))
  1386.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1387.       if (RX_HAS_CODE.test(rule.q))
  1388.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1389.       if (RX_HAS_CODE.test(rule.c))
  1390.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1391.       return rule;
  1392.     } catch (e) {
  1393.       if (!e.message.includes('unsafe-eval'))
  1394.         if (isBatchOp) {
  1395.           this.set(rule, e);
  1396.         } else {
  1397.           return e;
  1398.         }
  1399.     }
  1400.   }
  1401.  
  1402.   static runQ(text, doc, docUrl) {
  1403.     let url;
  1404.     if (typeof ai.rule.q === 'function') {
  1405.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1406.       if (Array.isArray(url)) {
  1407.         ai.urls = url.slice(1);
  1408.         url = url[0];
  1409.       }
  1410.     } else {
  1411.       const el = $many(ai.rule.q, doc);
  1412.       url = el && Remoting.findImageUrl(el, docUrl);
  1413.     }
  1414.     return url;
  1415.   }
  1416.  
  1417.   static runS(node, rule, m) {
  1418.     let urls = [];
  1419.     for (const s of ensureArray(rule.s))
  1420.       urls.push(
  1421.         typeof s === 'string' ? Util.maybeDecodeUrl(Ruler.substituteSingle(s, m)) :
  1422.           typeof s === 'function' ? s(m, node, rule) :
  1423.             s);
  1424.     if (rule.q && urls.length > 1) {
  1425.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1426.       return {skipRule: true};
  1427.     }
  1428.     if (Array.isArray(urls[0]))
  1429.       urls = urls[0];
  1430.     // `false` returned by "s" property means "skip this rule"
  1431.     // any other falsy value (like say "") means "stop all rules"
  1432.     return urls[0] === false ? {skipRule: true} : urls.map(Util.maybeDecodeUrl);
  1433.   }
  1434.  
  1435.   static substituteSingle(s, m) {
  1436.     if (!m) return s;
  1437.     if (s.startsWith('/') && !s.startsWith('//')) {
  1438.       const mid = s.search(/[^\\]\//) + 1;
  1439.       const end = s.lastIndexOf('/');
  1440.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1441.       return m.input.replace(re, s.slice(mid + 1, end));
  1442.     }
  1443.     if (m.length && s.includes('$')) {
  1444.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  1445.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  1446.         for (let i = maxLength; i >= 0; i--) {
  1447.           const part = num.slice(0, i) | 0;
  1448.           if (part < m.length)
  1449.             return (m[part] || '') + num.slice(i);
  1450.         }
  1451.         return text;
  1452.       });
  1453.     }
  1454.     return s;
  1455.   }
  1456. }
  1457.  
  1458. const SimpleUrlMatcher = (() => {
  1459.   // string-to-regexp escaped chars
  1460.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  1461.   // rx for '^' symbol in simple url match
  1462.   const RX_SEP = /[^\w%._-]/g;
  1463.   const RXS_SEP = RX_SEP.source;
  1464.   return match => {
  1465.     const results = [];
  1466.     for (const s of ensureArray(match)) {
  1467.       const pinDomain = s.startsWith('||');
  1468.       const pinStart = !pinDomain && s.startsWith('|');
  1469.       const endSep = s.endsWith('^');
  1470.       let fn;
  1471.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  1472.       if (needle.includes('^')) {
  1473.         const plain = findLongestPart(needle);
  1474.         const rx = new RegExp(
  1475.           (pinStart ? '^' : '') +
  1476.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  1477.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  1478.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  1479.         needle = [plain, rx];
  1480.         fn = regexp;
  1481.       } else if (pinStart) {
  1482.         fn = endSep ? equals : starts;
  1483.       } else if (pinDomain) {
  1484.         const slashPos = needle.indexOf('/');
  1485.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  1486.         needle = [needle, domain, slashPos > 0, endSep];
  1487.         fn = startsDomainPrescreen;
  1488.       } else if (endSep) {
  1489.         fn = ends;
  1490.       } else {
  1491.         fn = has;
  1492.       }
  1493.       results.push({fn, this: needle});
  1494.     }
  1495.     return results.length > 1 ?
  1496.       {fn: checkArray, this: results} :
  1497.       results[0];
  1498.   };
  1499.   function checkArray(s) {
  1500.     return this.some(checkArrayItem, s);
  1501.   }
  1502.   function checkArrayItem(item) {
  1503.     return item.fn.call(item.this, this);
  1504.   }
  1505.   function equals(s) {
  1506.     return s.startsWith(this) && (
  1507.       s.length === this.length ||
  1508.       s.length === this.length + 1 && endsWithSep(s));
  1509.   }
  1510.   function starts(s) {
  1511.     return s.startsWith(this);
  1512.   }
  1513.   function ends(s) {
  1514.     return s.endsWith(this) || (
  1515.       s.length > this.length &&
  1516.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  1517.       endsWithSep(s));
  1518.   }
  1519.   function has(s) {
  1520.     return s.includes(this);
  1521.   }
  1522.   function regexp(s) {
  1523.     return s.includes(this[0]) && this[1].test(s);
  1524.   }
  1525.   function endsWithSep(s) {
  1526.     RX_SEP.lastIndex = s.length - 1;
  1527.     return RX_SEP.test(s);
  1528.   }
  1529.   function startsDomainPrescreen(url) {
  1530.     return url.includes(this[0]) && startsDomain.call(this, url);
  1531.   }
  1532.   function startsDomain(url) {
  1533.     const [p, gap, host] = url.split('/', 3);
  1534.     if (gap || p && !p.endsWith(':'))
  1535.       return;
  1536.     const [needle, domain, pinDomainEnd, endSep] = this;
  1537.     let start = pinDomainEnd ? host.length - domain.length : 0;
  1538.     for (; ; start++) {
  1539.       start = host.indexOf(domain, start);
  1540.       if (start < 0)
  1541.         return;
  1542.       if (!start || host[start - 1] === '.')
  1543.         break;
  1544.     }
  1545.     start += p.length + 2;
  1546.     return url.lastIndexOf(needle, start) === start &&
  1547.            (!endSep || start + needle.length === url.length);
  1548.   }
  1549.   function findLongestPart(s) {
  1550.     const len = s.length;
  1551.     let maxLen = 0;
  1552.     let start;
  1553.     for (let i = 0, j; i < len; i = j + 1) {
  1554.       j = s.indexOf('^', i);
  1555.       if (j < 0)
  1556.         j = len;
  1557.       if (j - i > maxLen) {
  1558.         maxLen = j - i;
  1559.         start = i;
  1560.       }
  1561.     }
  1562.     return maxLen < len ? s.substr(start, maxLen) : s;
  1563.   }
  1564. })();
  1565.  
  1566. class RuleMatcher {
  1567.  
  1568.   /** @returns ?mpiv.RuleMatchInfo */
  1569.   static findForLink(a) {
  1570.     let url =
  1571.       a.getAttribute('data-expanded-url') ||
  1572.       a.getAttribute('data-full-url') ||
  1573.       a.getAttribute('data-url') ||
  1574.       a.href;
  1575.     if (url.startsWith('data:'))
  1576.       url = false;
  1577.     else if (url.includes('//t.co/'))
  1578.       url = 'http://' + a.textContent;
  1579.     return RuleMatcher.find(url, a);
  1580.   }
  1581.  
  1582.   /** @returns ?mpiv.RuleMatchInfo */
  1583.   static find(url, node, {noHtml, skipRule} = {}) {
  1584.     const tn = node.tagName;
  1585.     let m, html, urls;
  1586.     for (const rule of Ruler.rules) {
  1587.       const {e} = rule;
  1588.       if (e && !node.matches(e) || rule === skipRule)
  1589.         continue;
  1590.       const {r, u} = rule;
  1591.       if (r && !noHtml && rule.html && ('A,IMG,VIDEO'.includes(tn) || e))
  1592.         m = r.exec(html || (html = node.outerHTML));
  1593.       else if (r || u)
  1594.         m = url && RuleMatcher.makeUrlMatch(url, node, rule, r, u);
  1595.       else
  1596.         m = url ? RuleMatcher.makeDummyMatch(url) : [];
  1597.       if (!m ||
  1598.           // a rule with follow:true for the currently hovered IMG produced a URL,
  1599.           // but we'll only allow it to match rules without 's' in the nested find call
  1600.           'IMG,VIDEO'.includes(tn) && !('s' in rule) && !skipRule)
  1601.         continue;
  1602.       if (rule.s === '')
  1603.         return {};
  1604.       const hasS = 's' in rule && rule.s !== 'gallery';
  1605.       urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  1606.       if (!urls.skipRule) {
  1607.         const url = urls[0];
  1608.         return !url ? {} :
  1609.           hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule) ?
  1610.             RuleMatcher.find(url, node, {skipRule: rule}) :
  1611.             RuleMatcher.makeInfo(urls, node, rule, m);
  1612.       }
  1613.     }
  1614.   }
  1615.  
  1616.   static makeUrlMatch(url, node, rule, r, u) {
  1617.     let m;
  1618.     if (u) {
  1619.       u = rule._u || (rule._u = SimpleUrlMatcher(u));
  1620.       m = u.fn.call(u.this, url) && (r || RuleMatcher.makeDummyMatch(url));
  1621.     }
  1622.     return (m || !u) && r ? r.exec(url) : m;
  1623.   }
  1624.  
  1625.   static makeDummyMatch(url) {
  1626.     const m = [url];
  1627.     m.index = 0;
  1628.     m.input = url;
  1629.     return m;
  1630.   }
  1631.  
  1632.   /** @returns mpiv.RuleMatchInfo */
  1633.   static makeInfo(urls, node, rule, m) {
  1634.     const url = urls[0];
  1635.     const info = {
  1636.       node,
  1637.       rule,
  1638.       url,
  1639.       urls: urls.length > 1 ? urls.slice(1) : null,
  1640.       match: m,
  1641.       gallery: rule.g && Gallery.makeParser(rule.g),
  1642.       post: typeof rule.post === 'function' ? rule.post(m) : rule.post,
  1643.       xhr: cfg.xhr && rule.xhr,
  1644.     };
  1645.     Util.lazyGetRect(info, node, rule.rect);
  1646.     if (
  1647.       dotDomain.endsWith('.twitter.com') && !/(facebook|google|twimg|twitter)\.com\//.test(url) ||
  1648.       dotDomain.endsWith('.github.com') && !/github/.test(url) ||
  1649.       dotDomain.endsWith('.facebook.com') && /\bimgur\.com/.test(url)
  1650.     ) {
  1651.       info.xhr = 'data';
  1652.     }
  1653.     return info;
  1654.   }
  1655.  
  1656.   static isFollowableUrl(url, rule) {
  1657.     const f = rule.follow;
  1658.     return typeof f === 'function' ? f(url) : f;
  1659.   }
  1660. }
  1661.  
  1662. class Events {
  1663.  
  1664.   static onMouseOver(e) {
  1665.     if (!App.enabled || e.shiftKey || ai.zoom)
  1666.       return;
  1667.     let node = e.target;
  1668.     if (node === ai.popup ||
  1669.         node === doc.body ||
  1670.         node === doc.documentElement)
  1671.       return;
  1672.     if (node.shadowRoot)
  1673.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  1674.     if (!Ruler.rules)
  1675.       Ruler.init();
  1676.     let a;
  1677.     const tag = node.tagName;
  1678.     const src = node.currentSrc || node.src;
  1679.     const isPic = tag === 'IMG' || tag === 'VIDEO' && /\.(webm|mp4)(\?|$)/.test(src);
  1680.     const info =
  1681.       tag !== 'A' &&
  1682.         RuleMatcher.find(isPic && Util.rel2abs(src), node) ||
  1683.       (a = node.closest('A')) &&
  1684.         RuleMatcher.findForLink(a) ||
  1685.       isPic &&
  1686.         Util.lazyGetRect({node, rule: {}, url: src}, node);
  1687.     if (info && info.url && info.node !== ai.node)
  1688.       App.activate(info, e);
  1689.   }
  1690.  
  1691.   static pierceShadow(node, x, y) {
  1692.     for (let root; (root = node.shadowRoot);) {
  1693.       root.addEventListener('mouseover', Events.onMouseOver, PASSIVE);
  1694.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1695.       const inner = root.elementFromPoint(x, y);
  1696.       if (!inner || inner === node)
  1697.         break;
  1698.       node = inner;
  1699.     }
  1700.     return node;
  1701.   }
  1702.  
  1703.   static onMouseOut(e) {
  1704.     if (!e.relatedTarget && !e.shiftKey)
  1705.       App.deactivate();
  1706.   }
  1707.  
  1708.   static onMouseOutShadow(e) {
  1709.     const root = e.target.shadowRoot;
  1710.     if (root) {
  1711.       root.removeEventListener('mouseover', Events.onMouseOver);
  1712.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  1713.     }
  1714.   }
  1715.  
  1716.   static onMouseMove(e) {
  1717.     App.updateMouse(e);
  1718.     if (e.shiftKey) {
  1719.       ai.lazyUnload = true;
  1720.     } else if (!ai.zoomed && !ai.isOverRect) {
  1721.       App.deactivate();
  1722.     } else if (ai.zoom) {
  1723.       Popup.move();
  1724.       const {w, h} = ai.view;
  1725.       const {clientX: cx, clientY: cy} = ai;
  1726.       const bx = w / 6;
  1727.       const by = h / 6;
  1728.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  1729.       App.setStatus(`${onEdge ? '+' : '-'}edge`);
  1730.     }
  1731.   }
  1732.  
  1733.   static onMouseDown({shiftKey, button}) {
  1734.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  1735.       ai.controlled = ai.zoomed = true;
  1736.     } else if (button === 2 || shiftKey) {
  1737.       // we ignore RMB and Shift
  1738.     } else {
  1739.       App.deactivate({wait: true});
  1740.     }
  1741.   }
  1742.  
  1743.   static onMouseScroll(e) {
  1744.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  1745.     if (ai.zoom) {
  1746.       App.zoomInOut(dir);
  1747.     } else if (ai.gItems && ai.gItems.length > 1 && ai.popup) {
  1748.       Gallery.next(dir);
  1749.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  1750.       App.zoomToggle();
  1751.     } else {
  1752.       App.deactivate();
  1753.       return;
  1754.     }
  1755.     dropEvent(e);
  1756.   }
  1757.  
  1758.   static onKeyDown(e) {
  1759.     switch (e.key) {
  1760.       case 'Shift':
  1761.         App.setStatus('+shift');
  1762.         if (ai.popup && 'controls' in ai.popup)
  1763.           ai.popup.controls = true;
  1764.         break;
  1765.       case 'Control':
  1766.         if (!ai.popup && (cfg.start !== 'auto' || ai.rule.manual))
  1767.           Popup.start();
  1768.         break;
  1769.     }
  1770.   }
  1771.  
  1772.   static onKeyUp(e) {
  1773.     switch (e.key.length > 1 ? e.key : e.code) {
  1774.       case 'Shift':
  1775.         App.setStatus('-shift');
  1776.         if ((ai.popup || {}).controls)
  1777.           ai.popup.controls = false;
  1778.         if (ai.controlled) {
  1779.           ai.controlled = false;
  1780.           return;
  1781.         }
  1782.         ai.popup && (ai.zoomed || ai.isOverRect !== false) ?
  1783.           App.zoomToggle() :
  1784.           App.deactivate({wait: true});
  1785.         break;
  1786.       case 'Control':
  1787.         break;
  1788.       case 'Escape':
  1789.         App.deactivate({wait: true});
  1790.         break;
  1791.       case 'ArrowRight':
  1792.       case 'KeyJ':
  1793.         dropEvent(e);
  1794.         Gallery.next(1);
  1795.         break;
  1796.       case 'ArrowLeft':
  1797.       case 'KeyK':
  1798.         dropEvent(e);
  1799.         Gallery.next(-1);
  1800.         break;
  1801.       case 'KeyD': {
  1802.         dropEvent(e);
  1803.         Remoting.saveFile();
  1804.         break;
  1805.       }
  1806.       case 'KeyT':
  1807.         ai.lazyUnload = true;
  1808.         GM_openInTab(
  1809.           ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  1810.           navigator.userAgent.includes('Gecko/') ?
  1811.             Util.tabFixUrl() :
  1812.             ai.popup.src);
  1813.         App.deactivate();
  1814.         break;
  1815.       default:
  1816.         App.deactivate({wait: true});
  1817.     }
  1818.   }
  1819.  
  1820.   static onContext(e) {
  1821.     if (e.shiftKey) return;
  1822.     if (cfg.zoom === 'context' && ai.popup && App.zoomToggle()) {
  1823.       dropEvent(e);
  1824.     } else if (!ai.popup && (cfg.start === 'context' || (cfg.start === 'auto' && ai.rule.manual))) {
  1825.       Popup.start();
  1826.       dropEvent(e);
  1827.     } else {
  1828.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1829.     }
  1830.   }
  1831. }
  1832.  
  1833. class Popup {
  1834.  
  1835.   static schedule(force) {
  1836.     if (!cfg.preload) {
  1837.       ai.timer = setTimeout(Popup.start, cfg.delay);
  1838.     } else if (!force) {
  1839.       // we don't want to preload everything in the path of a quickly moving mouse cursor
  1840.       ai.timer = setTimeout(Popup.schedule, SETTLE_TIME, true);
  1841.       ai.preloadStart = now();
  1842.     } else {
  1843.       Popup.start();
  1844.       App.setStatus('+preloading');
  1845.       setTimeout(App.setStatus, cfg.delay, '-preloading');
  1846.     }
  1847.   }
  1848.  
  1849.   static start() {
  1850.     App.updateStyles();
  1851.     ai.gallery ?
  1852.       Popup.startGallery() :
  1853.       Popup.startSingle();
  1854.   }
  1855.  
  1856.   static startSingle() {
  1857.     App.setStatusLoading();
  1858.     ai.imageUrl = null;
  1859.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  1860.       Remoting.findRedirect();
  1861.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  1862.       Popup.startFromQ();
  1863.     } else {
  1864.       App.updateCaption();
  1865.       Popup.render(ai.url);
  1866.     }
  1867.   }
  1868.  
  1869.   static async startFromQ() {
  1870.     try {
  1871.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  1872.       const url = Ruler.runQ(responseText, doc, finalUrl);
  1873.       if (!url)
  1874.         throw 'File not found.';
  1875.       App.updateCaption(responseText, doc);
  1876.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  1877.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  1878.         if (!info || !info.url)
  1879.           throw `Couldn't follow URL: ${url}`;
  1880.         Object.assign(ai, info);
  1881.         Popup.startSingle();
  1882.       } else {
  1883.         Popup.render(url, finalUrl);
  1884.       }
  1885.     } catch (e) {
  1886.       App.handleError(e);
  1887.     }
  1888.   }
  1889.  
  1890.   static async startGallery() {
  1891.     App.setStatusLoading();
  1892.     try {
  1893.       const startUrl = ai.url;
  1894.       const p = ai.rule.s === 'gallery' ? {} : await Remoting.getDoc(startUrl);
  1895.       const items = await new Promise(resolve => {
  1896.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, resolve);
  1897.         if (Array.isArray(it))
  1898.           resolve(it);
  1899.       });
  1900.       // bail out if the gallery's async callback took too long
  1901.       if (ai.url !== startUrl) return;
  1902.       ai.gItems = items.length && items;
  1903.       if (ai.gItems) {
  1904.         ai.gIndex = Gallery.findIndex(ai.url);
  1905.         setTimeout(Gallery.next);
  1906.       } else {
  1907.         throw 'Empty gallery';
  1908.       }
  1909.     } catch (e) {
  1910.       App.handleError(e);
  1911.     }
  1912.   }
  1913.  
  1914.   static async render(src, pageUrl) {
  1915.     Popup.destroy();
  1916.     ai.imageUrl = src;
  1917.     if (ai.xhr && src)
  1918.       src = await Remoting.getImage(src, pageUrl).catch(App.handleError);
  1919.     if (!src) return;
  1920.     const p = ai.popup =
  1921.       src.startsWith('data:video') ||
  1922.       !src.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(src) ?
  1923.         PopupVideo.create() :
  1924.         $create('img');
  1925.     p.id = `${PREFIX}popup`;
  1926.     p.src = src;
  1927.     p.addEventListener('error', App.handleError);
  1928.     p.addEventListener('load', Popup.onLoad, {once: true});
  1929.     if (ai.zooming)
  1930.       p.addEventListener('transitionend', Popup.onZoom);
  1931.     doc.body.insertBefore(p, ai.bar || undefined);
  1932.     await 0;
  1933.     App.checkProgress({start: true});
  1934.   }
  1935.  
  1936.   static onLoad() {
  1937.     this.setAttribute('loaded', '');
  1938.     ai.popupLoaded = true;
  1939.     if (!ai.bar)
  1940.       App.updateFileInfo();
  1941.   }
  1942.  
  1943.   static onZoom() {
  1944.     this.classList.remove(`${PREFIX}zooming`);
  1945.   }
  1946.  
  1947.   static move() {
  1948.     const p = ai.popup;
  1949.     if (!p) return;
  1950.     let x, y;
  1951.     const w = Math.round(ai.scale * ai.nwidth);
  1952.     const h = Math.round(ai.scale * ai.nheight);
  1953.     const cx = ai.clientX;
  1954.     const cy = ai.clientY;
  1955.     const vw = ai.view.w - ai.outline * 2;
  1956.     const vh = ai.view.h - ai.outline * 2;
  1957.     if (!ai.zoom && (!ai.gItems || ai.gItems.length < 2) && !cfg.center) {
  1958.       const r = ai.rect;
  1959.       const rx = (r.left + r.right) / 2;
  1960.       const ry = (r.top + r.bottom) / 2;
  1961.       if (vw - r.right - 40 > w + ai.mbw || w + ai.mbw < r.left - 40) {
  1962.         if (h + ai.mbh < vh - 60)
  1963.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1964.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1965.       } else if (vh - r.bottom - 40 > h + ai.mbh || h + ai.mbh < r.top - 40) {
  1966.         if (w + ai.mbw < vw - 60)
  1967.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1968.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1969.       }
  1970.     }
  1971.     if (x === undefined) {
  1972.       const mid = vw > w ?
  1973.         vw / 2 - w / 2 :
  1974.         -1 * clamp(5 / 3 * (cx / vw - 0.2), 0, 1) * (w - vw);
  1975.       x = Math.round(mid - (ai.pw + ai.mbw) / 2);
  1976.     }
  1977.     if (y === undefined) {
  1978.       const mid = vh > h ?
  1979.         vh / 2 - h / 2 :
  1980.         -1 * clamp(5 / 3 * (cy / vh - 0.2), 0, 1) * (h - vh);
  1981.       y = Math.round(mid - (ai.ph + ai.mbh) / 2);
  1982.     }
  1983.     p.style.setProperty('transform',
  1984.       `translate(${x + ai.outline}px, ${y + ai.outline}px) scale(${ai.scale})`, 'important');
  1985.   }
  1986.  
  1987.   static destroy() {
  1988.     const p = ai.popup;
  1989.     if (!p) return;
  1990.     p.removeEventListener('error', App.handleError);
  1991.     if (typeof p.pause === 'function')
  1992.       p.pause();
  1993.     if (!ai.lazyUnload) {
  1994.       if (p.src.startsWith('blob:'))
  1995.         URL.revokeObjectURL(p.src);
  1996.       p.src = '';
  1997.     }
  1998.     p.remove();
  1999.     ai.zoom = ai.popup = ai.popupLoaded = null;
  2000.   }
  2001. }
  2002.  
  2003. class PopupVideo {
  2004.   static create() {
  2005.     const p = $create('video');
  2006.     p.autoplay = true;
  2007.     p.loop = true;
  2008.     p.volume = 0.5;
  2009.     p.controls = false;
  2010.     p.addEventListener('progress', PopupVideo.progress);
  2011.     p.addEventListener('canplaythrough', PopupVideo.progressDone, {once: true});
  2012.     ai.bufBar = false;
  2013.     ai.bufStart = now();
  2014.     return p;
  2015.   }
  2016.  
  2017.   static progress() {
  2018.     const {duration} = this;
  2019.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  2020.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  2021.       if ((ai.bufBar |= pct > 0 && pct < 50))
  2022.         App.setBar(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  2023.     }
  2024.   }
  2025.  
  2026.   static async progressDone() {
  2027.     this.removeEventListener('progress', PopupVideo.progress);
  2028.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`)) {
  2029.       App.setBar(false);
  2030.       App.updateFileInfo();
  2031.     }
  2032.     try {
  2033.       await this.play();
  2034.     } catch (e) {
  2035.       if (this.paused) this.controls = true;
  2036.     }
  2037.   }
  2038. }
  2039.  
  2040. class Gallery {
  2041.  
  2042.   static makeParser(g) {
  2043.     return (
  2044.       typeof g === 'function' ? g :
  2045.         typeof g === 'string' ? Util.newFunction('text', 'doc', 'url', 'm', 'rule', 'cb', g) :
  2046.           Gallery.defaultParser
  2047.     );
  2048.   }
  2049.  
  2050.   static findIndex(gUrl) {
  2051.     const sel = gUrl.split('#')[1];
  2052.     if (!sel)
  2053.       return 0;
  2054.     if (/^\d+$/.test(sel))
  2055.       return parseInt(sel);
  2056.     for (let i = ai.gItems.length; i--;) {
  2057.       let {url} = ai.gItems[i];
  2058.       if (Array.isArray(url))
  2059.         url = url[0];
  2060.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  2061.         return i;
  2062.     }
  2063.     return 0;
  2064.   }
  2065.  
  2066.   static next(dir) {
  2067.     if (dir < 0 && (ai.gIndex -= dir) >= ai.gItems.length) {
  2068.       ai.gIndex = 0;
  2069.     } else if (dir > 0 && (ai.gIndex -= dir) < 0) {
  2070.       ai.gIndex = ai.gItems.length - 1;
  2071.     }
  2072.     const item = ai.gItems[ai.gIndex];
  2073.     if (Array.isArray(item.url)) {
  2074.       ai.urls = item.url.slice(1);
  2075.       ai.url = item.url[0];
  2076.     } else {
  2077.       ai.urls = null;
  2078.       ai.url = item.url;
  2079.     }
  2080.     Popup.destroy();
  2081.     Popup.startSingle();
  2082.     App.updateFileInfo();
  2083.     Gallery.preload(dir);
  2084.   }
  2085.  
  2086.   static preload(dir) {
  2087.     const i = ai.gIndex - dir;
  2088.     if (ai.popup && i >= 0 && i < ai.gItems.length) {
  2089.       ai.preloadUrl = ensureArray(ai.gItems[i].url)[0];
  2090.       ai.popup.addEventListener('load', Gallery.preloadOnLoad, {once: true});
  2091.     }
  2092.   }
  2093.  
  2094.   static preloadOnLoad() {
  2095.     $create('img', {src: ai.preloadUrl});
  2096.   }
  2097.  
  2098.   static defaultParser(text, doc, docUrl, m, rule) {
  2099.     const {g} = rule;
  2100.     const qEntry = g.entry;
  2101.     const qCaption = ensureArray(g.caption);
  2102.     const qImage = g.image;
  2103.     const qTitle = g.title;
  2104.     const fix =
  2105.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  2106.       (s => s.trim());
  2107.     const items = [...$$(qEntry || qImage, doc)]
  2108.       .map(processEntry)
  2109.       .filter(Boolean);
  2110.     items.title = processTitle();
  2111.     return items;
  2112.  
  2113.     function processEntry(entry) {
  2114.       const item = {};
  2115.       try {
  2116.         const img = qEntry ? $(qImage, entry) : entry;
  2117.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  2118.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  2119.       } catch (e) {}
  2120.       return item.url && item;
  2121.     }
  2122.  
  2123.     function processCaption(selector) {
  2124.       const el = $(selector, this) ||
  2125.                  $orSelf(selector, this.previousElementSibling) ||
  2126.                  $orSelf(selector, this.nextElementSibling);
  2127.       return el && fix(el.textContent);
  2128.     }
  2129.  
  2130.     function processTitle() {
  2131.       const el = $(qTitle, doc);
  2132.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  2133.     }
  2134.  
  2135.     function $orSelf(selector, el) {
  2136.       if (el && !el.matches(qEntry))
  2137.         return el.matches(selector) ? el : $(selector, el);
  2138.     }
  2139.   }
  2140. }
  2141.  
  2142. class Remoting {
  2143.  
  2144.   static gmXhr(url, opts = {}) {
  2145.     if (ai.req)
  2146.       tryCatch.call(ai.req, ai.req.abort);
  2147.     return new Promise((resolve, reject) => {
  2148.       ai.req = GM_xmlhttpRequest({
  2149.         url,
  2150.         method: 'GET',
  2151.         anonymous: (ai.rule || {}).anonymous,
  2152.         timeout: 10e3,
  2153.         ...opts,
  2154.         onload: done,
  2155.         onerror: done,
  2156.         ontimeout() {
  2157.           ai.req = null;
  2158.           reject(`Timeout fetching ${url}`);
  2159.         },
  2160.       });
  2161.       function done(r) {
  2162.         ai.req = null;
  2163.         r.status < 400 && !r.error ?
  2164.           resolve(r) :
  2165.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2166.       }
  2167.     });
  2168.   }
  2169.  
  2170.   static async getDoc(url) {
  2171.     const r = await (!ai.post ?
  2172.       Remoting.gmXhr(url) :
  2173.       Remoting.gmXhr(url, {
  2174.         method: 'POST',
  2175.         data: ai.post,
  2176.         headers: {
  2177.           'Content-Type': 'application/x-www-form-urlencoded',
  2178.           'Referer': url,
  2179.         },
  2180.       }));
  2181.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2182.     return r;
  2183.   }
  2184.  
  2185.   static async getImage(url, pageUrl) {
  2186.     ai.bufBar = false;
  2187.     ai.bufStart = now();
  2188.     const response = await Remoting.gmXhr(url, {
  2189.       responseType: 'blob',
  2190.       headers: {
  2191.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2192.         Referer: pageUrl || (typeof ai.xhr === 'function' ? ai.xhr() : url),
  2193.       },
  2194.       onprogress: Remoting.getImageProgress,
  2195.     });
  2196.     App.setBar(false);
  2197.     const type = Remoting.guessMimeType(response);
  2198.     let b = response.response;
  2199.     if (b.type !== type)
  2200.       b = b.slice(0, b.size, type);
  2201.     return ai.xhr === 'data' ?
  2202.       Remoting.blobToDataUrl(b) :
  2203.       URL.createObjectURL(b);
  2204.   }
  2205.  
  2206.   static getImageProgress(e) {
  2207.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2208.       ai.bufBar = true;
  2209.     if (ai.bufBar) {
  2210.       const pct = e.loaded / e.total * 100 | 0;
  2211.       const size = e.total / 1024 | 0;
  2212.       App.setBar(`${pct}% of ${size} kiB`, 'xhr');
  2213.     }
  2214.   }
  2215.  
  2216.   static async findRedirect() {
  2217.     try {
  2218.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2219.         method: 'HEAD',
  2220.         headers: {
  2221.           'Referer': location.href.split('#', 1)[0],
  2222.         },
  2223.       });
  2224.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2225.       if (!info || !info.url)
  2226.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2227.       Object.assign(ai, info);
  2228.       Popup.startSingle();
  2229.     } catch (e) {
  2230.       App.handleError(e);
  2231.     }
  2232.   }
  2233.  
  2234.   static async saveFile() {
  2235.     let url = ai.popup.src || ai.popup.currentSrc;
  2236.     let name = Remoting.getFileName(ai.imageUrl || url);
  2237.     if (!name.includes('.'))
  2238.       name += '.jpg';
  2239.     try {
  2240.       if (!url.startsWith('blob:') && !url.startsWith('data:')) {
  2241.         const {response} = await Remoting.gmXhr(url, {
  2242.           responseType: 'blob',
  2243.           headers: {'Referer': url},
  2244.         });
  2245.         url = URL.createObjectURL(response);
  2246.         setTimeout(() => URL.revokeObjectURL(url), 1000);
  2247.       }
  2248.       $create('a', {href: url, download: name})
  2249.         .dispatchEvent(new MouseEvent('click'));
  2250.     } catch (e) {
  2251.       App.setBar(`Could not download ${name}.`, 'error');
  2252.     }
  2253.   }
  2254.  
  2255.   static getFileName(url) {
  2256.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2257.   }
  2258.  
  2259.   static blobToDataUrl(blob) {
  2260.     return new Promise((resolve, reject) => {
  2261.       const fr = new FileReader();
  2262.       fr.onload = () => resolve(fr.result);
  2263.       fr.onerror = reject;
  2264.       fr.readAsDataURL(blob);
  2265.     });
  2266.   }
  2267.  
  2268.   static guessMimeType({responseHeaders, finalUrl}) {
  2269.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2270.         !RegExp.$1.includes('text/plain'))
  2271.       return RegExp.$1;
  2272.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2273.     switch (ext.toLowerCase()) {
  2274.       case 'bmp': return 'image/bmp';
  2275.       case 'gif': return 'image/gif';
  2276.       case 'jpe': return 'image/jpeg';
  2277.       case 'jpeg': return 'image/jpeg';
  2278.       case 'jpg': return 'image/jpeg';
  2279.       case 'mp4': return 'video/mp4';
  2280.       case 'png': return 'image/png';
  2281.       case 'svg': return 'image/svg+xml';
  2282.       case 'tif': return 'image/tiff';
  2283.       case 'tiff': return 'image/tiff';
  2284.       case 'webm': return 'video/webm';
  2285.       default: return 'application/octet-stream';
  2286.     }
  2287.   }
  2288.  
  2289.   static findImageUrl(n, url) {
  2290.     let html;
  2291.     const path =
  2292.       n.getAttribute('src') ||
  2293.       n.getAttribute('data-m4v') ||
  2294.       n.getAttribute('href') ||
  2295.       n.getAttribute('content') ||
  2296.       (html = n.outerHTML).includes('http') &&
  2297.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2298.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2299.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2300.   }
  2301. }
  2302.  
  2303. class Util {
  2304.  
  2305.   static addStyle(name, css) {
  2306.     const id = `${PREFIX}style:${name}`;
  2307.     const el = doc.getElementById(id) ||
  2308.                css && $create('style', {id});
  2309.     if (!el) return;
  2310.     if (el.textContent !== css)
  2311.       el.textContent = css;
  2312.     if (el.parentElement !== doc.head)
  2313.       doc.head.appendChild(el);
  2314.     return el;
  2315.   }
  2316.  
  2317.   static decodeHtmlEntities(s) {
  2318.     return s
  2319.       .replace(/&quot;/g, '"')
  2320.       .replace(/&apos;/g, '\'')
  2321.       .replace(/&lt;/g, '<')
  2322.       .replace(/&gt;/g, '>')
  2323.       .replace(/&amp;/g, '&');
  2324.   }
  2325.   static deepEqual(a, b) {
  2326.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2327.       return a === b;
  2328.     if (Array.isArray(a)) {
  2329.       return Array.isArray(b) &&
  2330.         a.length === b.length &&
  2331.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2332.     }
  2333.     const keys = Object.keys(a);
  2334.     return keys.length === Object.keys(b).length &&
  2335.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2336.   }
  2337.  
  2338.   static findScale(url, parent) {
  2339.     const imgs = $$('img, video', parent);
  2340.     for (let i = imgs.length, img; (img = imgs[--i]);) {
  2341.       if ((img.currentSrc || img.src) !== url || img.sizes)
  2342.         continue;
  2343.       const scaleX = (img.naturalWidth || img.videoWidth) / img.offsetWidth;
  2344.       const scaleY = (img.naturalHeight || img.videoHeight) / img.offsetHeight;
  2345.       const s = Math.max(scaleX, scaleY);
  2346.       if (isFinite(s))
  2347.         return s;
  2348.     }
  2349.   }
  2350.  
  2351.   static findScaleIndex(dir) {
  2352.     const i = ai.scales.indexOf(ai.scale);
  2353.     if (i >= 0) return i + dir;
  2354.     for (let len = ai.scales.length, i = dir > 0 ? 0 : len - 1; i >= 0 && i < len; i += dir)
  2355.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  2356.         return i;
  2357.     return -1;
  2358.   }
  2359.  
  2360.   static forceLayout(node) {
  2361.     // eslint-disable-next-line no-unused-expressions
  2362.     node.clientHeight;
  2363.   }
  2364.  
  2365.   static formatError(e, rule) {
  2366.     const message =
  2367.       e.message ||
  2368.       e.readyState && 'Request failed.' ||
  2369.       e.type === 'error' && `File can't be displayed.${
  2370.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2371.       }` ||
  2372.       e;
  2373.     const m = [
  2374.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2375.       ['', 'font-weight:normal;color:unset'],
  2376.     ];
  2377.     m.push(...[
  2378.       rule.u && ['Url simple match: %o', rule.u],
  2379.       rule.e && ['Element match: %o', rule.e],
  2380.       rule.r && ['RegExp match: %o', rule.r],
  2381.       ai.url && ['URL: %s', ai.url],
  2382.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2383.       ['Node: %o', ai.node],
  2384.     ].filter(Boolean));
  2385.     return {
  2386.       message,
  2387.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2388.       consoleArgs: m.map(([, v]) => v),
  2389.     };
  2390.   }
  2391.  
  2392.   static getFrameSize(frameWindow, parentWindow) {
  2393.     const r = frameWindow.frameElement.getBoundingClientRect();
  2394.     const w = clamp(r.width, 0, parentWindow.innerWidth - r.left);
  2395.     const h = clamp(r.height, 0, parentWindow.innerHeight - r.top);
  2396.     return [w, h];
  2397.   }
  2398.  
  2399.   static lazyGetRect(obj, node, selector) {
  2400.     return Object.defineProperty(obj, 'rect', {
  2401.       configurable: true,
  2402.       get() {
  2403.         const value = Util.rect(node, selector);
  2404.         Object.defineProperty(obj, 'rect', {value, configurable: true});
  2405.         return value;
  2406.       },
  2407.     });
  2408.   }
  2409.  
  2410.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2411.   static maybeDecodeUrl(url) {
  2412.     if (!url) return url;
  2413.     const iPct = url.indexOf('%');
  2414.     const iColon = url.indexOf(':');
  2415.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2416.       decodeURIComponent(url) :
  2417.       url;
  2418.   }
  2419.  
  2420.   static newFunction(...args) {
  2421.     try {
  2422.       return App.NOP || new Function(...args);
  2423.     } catch (e) {
  2424.       if (!e.message.includes('unsafe-eval'))
  2425.         throw e;
  2426.       App.NOP = () => {};
  2427.       return App.NOP;
  2428.     }
  2429.   }
  2430.  
  2431.   static rect(node, selector) {
  2432.     let n = selector && node.closest(selector);
  2433.     if (n) return n.getBoundingClientRect();
  2434.     const nested = node.getElementsByTagName('*');
  2435.     let maxArea = 0;
  2436.     let maxBounds;
  2437.     n = node;
  2438.     for (let i = 0; n; n = nested[i++]) {
  2439.       const bounds = n.getBoundingClientRect();
  2440.       const area = bounds.width * bounds.height;
  2441.       if (area > maxArea) {
  2442.         maxArea = area;
  2443.         maxBounds = bounds;
  2444.         node = n;
  2445.       }
  2446.     }
  2447.     return maxBounds;
  2448.   }
  2449.  
  2450.   static rel2abs(rel, abs = location.href) {
  2451.     try {
  2452.       return rel.startsWith('data:') ? rel :
  2453.         rel.startsWith('blob:') ? '' : // blobs don't work because they're usually revoked
  2454.           new URL(rel, abs).href;
  2455.     } catch (e) {
  2456.       return rel;
  2457.     }
  2458.   }
  2459.  
  2460.   static scaleCut(scale, i, arr) {
  2461.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  2462.   }
  2463.  
  2464.   static scaleNextToZoom(keepScale) {
  2465.     const z = ai.scaleZoom;
  2466.     return keepScale || z !== ai.scale ? z :
  2467.       z >= 1 ? ai.scales.find(x => x > z) :
  2468.         1;
  2469.   }
  2470.  
  2471.   static suppressHoverTooltip() {
  2472.     for (const node of [
  2473.       ai.node.parentNode,
  2474.       ai.node,
  2475.       ai.node.firstElementChild,
  2476.     ]) {
  2477.       const t = (node || 0).title;
  2478.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2479.         ai.tooltip = {node, text: t};
  2480.         node.title = '';
  2481.         break;
  2482.       }
  2483.     }
  2484.   }
  2485.  
  2486.   static tabFixUrl() {
  2487.     return `data:text/html;charset=utf8,
  2488.       <style>
  2489.         body {
  2490.           margin: 0;
  2491.           padding: 0;
  2492.           background: #222;
  2493.         }
  2494.         .fit {
  2495.           overflow: hidden
  2496.         }
  2497.         .fit > img {
  2498.           max-width: 100vw;
  2499.           max-height: 100vh;
  2500.         }
  2501.         body > img {
  2502.           margin: auto;
  2503.           position: absolute;
  2504.           left: 0;
  2505.           right: 0;
  2506.           top: 0;
  2507.           bottom: 0;
  2508.         }
  2509.       </style>
  2510.       <body class=fit>
  2511.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2512.       </body>
  2513.     `.replace(/\n\s*/g, '').replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2514.   }
  2515. }
  2516.  
  2517. function setup({rule} = {}) {
  2518.   const MPIV_BASE_URL = 'https://w9p.co/userscripts/mpiv/';
  2519.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2520.   let root = (elConfig || 0).shadowRoot;
  2521.   let {blankRuleElement} = setup;
  2522.   /** @type NodeList */
  2523.   const UI = new Proxy({}, {
  2524.     get(_, id) {
  2525.       return root.getElementById(id);
  2526.     },
  2527.   });
  2528.   if (!rule || !elConfig)
  2529.     init(new Config({save: true}));
  2530.   if (rule)
  2531.     installRule(rule);
  2532.  
  2533.   function closeSetup(event) {
  2534.     if (event && this.id !== 'x') {
  2535.       cfg = collectConfig({save: true, clone: this.id === 'apply'});
  2536.       Ruler.init();
  2537.       if (this.id === 'apply') {
  2538.         renderCustomScales(cfg);
  2539.         return;
  2540.       }
  2541.     }
  2542.     $remove(elConfig);
  2543.   }
  2544.  
  2545.   function collectConfig({save, clone} = {}) {
  2546.     const delay = parseInt(UI.delay.value);
  2547.     const scale = parseFloat(UI.scale.value.replace(',', '.'));
  2548.     let data = {
  2549.       css: UI.css.value.trim(),
  2550.       delay: !isNaN(delay) && delay >= 0 ? delay : undefined,
  2551.       fit: UI.fit.value || '',
  2552.       hosts: collectRules(),
  2553.       scale: !isNaN(scale) ? Math.max(1, scale) : undefined,
  2554.       scales: UI.scales.value
  2555.         .trim()
  2556.         .split(/[,;]*\s+/)
  2557.         .map(x => x.replace(',', '.'))
  2558.         .filter(x => !isNaN(parseFloat(x))),
  2559.       start: UI.start.value,
  2560.       zoom: UI.zoom.value,
  2561.       zoomOut: UI.zoomOut.value,
  2562.     };
  2563.     for (const el of $$('[type="checkbox"]', root))
  2564.       data[el.id] = el.checked;
  2565.     if (clone)
  2566.       data = JSON.parse(JSON.stringify(data));
  2567.     return new Config({data, save});
  2568.   }
  2569.  
  2570.   function collectRules() {
  2571.     return [...UI.rules.children]
  2572.       .map(el => [el.value.trim(), el[RULE]])
  2573.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2574.       .map(([s, json]) => json || s)
  2575.       .filter(Boolean);
  2576.   }
  2577.  
  2578.   function exportSettings(e) {
  2579.     dropEvent(e);
  2580.     const txt = $create('textarea', {
  2581.       style: 'opacity:0; position:absolute',
  2582.       value: JSON.stringify(collectConfig(), null, '  '),
  2583.     });
  2584.     root.appendChild(txt);
  2585.     txt.select();
  2586.     txt.focus();
  2587.     document.execCommand('copy');
  2588.     e.target.focus();
  2589.     txt.remove();
  2590.     UI.exportNotification.hidden = false;
  2591.     setTimeout(() => (UI.exportNotification.hidden = true), 1000);
  2592.   }
  2593.  
  2594.   function importSettings(e) {
  2595.     dropEvent(e);
  2596.     const s = prompt('Paste settings:');
  2597.     if (s)
  2598.       init(new Config({data: s}));
  2599.   }
  2600.  
  2601.   function checkRule({target: el}) {
  2602.     let json, error;
  2603.     const prev = el.previousElementSibling;
  2604.     if (el.value) {
  2605.       json = Ruler.parse(el.value);
  2606.       error = json instanceof Error && (json.message || String(json));
  2607.       if (!prev)
  2608.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2609.     } else if (prev) {
  2610.       prev.focus();
  2611.       el.remove();
  2612.     }
  2613.     el[RULE] = !error && json;
  2614.     el.title = error || '';
  2615.     el.setCustomValidity(error || '');
  2616.   }
  2617.  
  2618.   function focusRule({type, target: el, relatedTarget: from}) {
  2619.     if (el === this)
  2620.       return;
  2621.     if (type === 'paste') {
  2622.       setTimeout(() => focusRule.call(this, {target: el}));
  2623.       return;
  2624.     }
  2625.     if (el[RULE])
  2626.       el.value = Ruler.format(el[RULE], {expand: true});
  2627.     const h = clamp(el.scrollHeight, 15, elConfig.clientHeight / 4);
  2628.     if (h > el.offsetHeight)
  2629.       el.style.minHeight = h + 'px';
  2630.     if (!this.contains(from))
  2631.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2632.     if (from) {
  2633.       from.style.minHeight = '';
  2634.       if (from[RULE])
  2635.         from.value = Ruler.format(from[RULE]);
  2636.     }
  2637.   }
  2638.  
  2639.   function installRule(rule) {
  2640.     const inputs = UI.rules.children;
  2641.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2642.     if (!el) {
  2643.       el = inputs[0];
  2644.       el[RULE] = rule;
  2645.       el.value = Ruler.format(rule);
  2646.       el.hidden = false;
  2647.       const i = Math.max(0, collectRules().indexOf(rule));
  2648.       inputs[i].insertAdjacentElement('afterend', el);
  2649.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2650.     }
  2651.     const rect = el.getBoundingClientRect();
  2652.     if (rect.bottom < 0 ||
  2653.         rect.bottom > el.parentNode.offsetHeight)
  2654.       el.scrollIntoView();
  2655.     el.classList.add('highlight');
  2656.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2657.     el.focus();
  2658.   }
  2659.  
  2660.   function renderCustomScales(config) {
  2661.     UI.scales.value = config.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  2662.   }
  2663.  
  2664.   function init(config) {
  2665.     closeSetup();
  2666.     // preventing the main page from interpreting key presses in inputs as hotkeys
  2667.     // which may happen since it sees only the outer <div> in the event |target|
  2668.     elConfig = $create('div', {contentEditable: true});
  2669.     const scalesHint = 'Leave it empty and click Apply or Save to restore the default values.';
  2670.     const trimLeft = s => s.trim().replace(/\n\s+/g, '\n');
  2671.     root = elConfig.attachShadow({mode: 'open'});
  2672.     root.innerHTML = `
  2673. <style>
  2674.   :host {
  2675.     all: initial !important;
  2676.     position: fixed !important;
  2677.     z-index: 2147483647 !important;
  2678.     top: 20px !important;
  2679.     right: 20px !important;
  2680.     padding: 20px 30px !important;
  2681.     color: #000 !important;
  2682.     background: #eee !important;
  2683.     box-shadow: 5px 5px 25px 2px #000 !important;
  2684.     width: 500px !important;
  2685.     border: 1px solid black !important;
  2686.     display: flex !important;
  2687.     flex-direction: column !important;
  2688.   }
  2689.   main {
  2690.     font: 12px/15px sans-serif;
  2691.   }
  2692.   ul {
  2693.     max-height: calc(100vh - 200px);
  2694.     margin: 10px 0 15px 0;
  2695.     padding: 0;
  2696.     list-style: none;
  2697.   }
  2698.   li {
  2699.     margin: 0;
  2700.     padding: .25em 0;
  2701.   }
  2702.   li.options {
  2703.     display: flex;
  2704.     align-items: center;
  2705.     justify-content: space-between;
  2706.   }
  2707.   li.row {
  2708.     flex-wrap: wrap;
  2709.     justify-content: flex-start;
  2710.   }
  2711.   li.row label {
  2712.     flex-direction: row;
  2713.     align-items: center;
  2714.   }
  2715.   li.row input {
  2716.     margin-right: .25em;
  2717.   }
  2718.   label {
  2719.     display: inline-flex;
  2720.     flex-direction: column;
  2721.   }
  2722.   label:not(:last-child) {
  2723.     margin-right: 1em;
  2724.   }
  2725.   input, select {
  2726.     min-height: 1.6em;
  2727.     box-sizing: border-box;
  2728.   }
  2729.   input[type="checkbox"] {
  2730.     margin-left: 0;
  2731.   }
  2732.   input[type="number"] {
  2733.     width: 4em;
  2734.   }
  2735.   input:not([type="checkbox"])  {
  2736.     padding: 0 .25em;
  2737.   }
  2738.   textarea {
  2739.     flex: 1;
  2740.     resize: vertical;
  2741.     margin: 1px 0;
  2742.     font: 11px/1.25 Consolas, monospace;
  2743.   }
  2744.   textarea:invalid {
  2745.     background-color: #f002;
  2746.     border-color: #800;
  2747.   }
  2748.   code {
  2749.     font-weight: bold;
  2750.   }
  2751.   a {
  2752.     text-decoration: none;
  2753.   }
  2754.   a:hover {
  2755.     text-decoration: underline;
  2756.   }
  2757.   button {
  2758.     padding: .2em 1em;
  2759.     margin: 0 1em;
  2760.   }
  2761.   .column {
  2762.     display: flex;
  2763.     flex-direction: column;
  2764.   }
  2765.   .highlight {
  2766.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  2767.     animation-fill-mode: both;
  2768.   }
  2769.   #rules textarea {
  2770.     word-break: break-all;
  2771.   }
  2772.   #x {
  2773.     position: absolute;
  2774.     top: 0;
  2775.     right: 0;
  2776.     padding: 4px 8px;
  2777.     cursor: pointer;
  2778.     user-select: none;
  2779.   }
  2780.   #x:hover {
  2781.     background-color: #8884;
  2782.   }
  2783.   #cssApp {
  2784.     color: seagreen;
  2785.   }
  2786.   #exportNotification {
  2787.     color: green;
  2788.     font-weight: bold;
  2789.     position: absolute;
  2790.     left: 0;
  2791.     right: 0;
  2792.     bottom: 2px;
  2793.   }
  2794.   #installHint {
  2795.     color: green;
  2796.   }
  2797.   @keyframes fade-in {
  2798.     from { background-color: deepskyblue }
  2799.     to {}
  2800.   }
  2801.   @media (prefers-color-scheme: dark) {
  2802.     :host {
  2803.       color: #aaa !important;
  2804.       background: #333 !important;
  2805.     }
  2806.     a {
  2807.       color: deepskyblue;
  2808.     }
  2809.     textarea, input, select {
  2810.       background: #111;
  2811.       color: #BBB;
  2812.       border: 1px solid #555;
  2813.     }
  2814.     input[type="checkbox"] {
  2815.       filter: invert(1);
  2816.     }
  2817.     #cssApp {
  2818.       color: darkseagreen;
  2819.     }
  2820.     #installHint {
  2821.       color: greenyellow;
  2822.     }
  2823.   }
  2824. </style>
  2825. <main>
  2826.   <a href="${MPIV_BASE_URL}">${GM_info.script.name}</a>
  2827.   <div id=x>x</div>
  2828.   <ul class=column>
  2829.     <li class=options>
  2830.       <label>Popup shows on
  2831.         <select id=start>
  2832.           <option value=auto>automatically
  2833.           <option value=context>Right click / Ctrl
  2834.           <option value=ctrl>Ctrl
  2835.         </select>
  2836.       </label>
  2837.       <label>after, ms <input id=delay type=number min=0 max=10000 step=50 title=milliseconds></label>
  2838.       <label title="Activate only if the full version of the hovered image is that many times larger">
  2839.         if larger <input id=scale type=number min=1 max=100 step=.05>
  2840.       </label>
  2841.       <label>Zoom activates on
  2842.         <select id=zoom>
  2843.           <option value=context>Right click / Shift
  2844.           <option value=wheel>Wheel up / Shift
  2845.           <option value=shift>Shift
  2846.           <option value=auto>automatically
  2847.         </select>
  2848.       </label>
  2849.       <label>...and zooms to
  2850.         <select id=fit>
  2851.           <option value=all>fit to window
  2852.           <option value=large>fit if larger
  2853.           <option value=no>100%
  2854.           <option value="" title="Use custom scale factors">custom
  2855.         </select>
  2856.       </label>
  2857.     </li>
  2858.     <li class=options>
  2859.       <label>When fully zoomed out:
  2860.         <select id=zoomOut>
  2861.           <option value=stay>stay in zoom mode
  2862.           <option value=auto>stay if still hovered
  2863.           <option value=close>close popup
  2864.         </select>
  2865.       </label>
  2866.       <label style="flex: 1" title="${trimLeft(`
  2867.         0 = fit to window,
  2868.         0! = same as 0 but also removes smaller values,
  2869.         * after a value marks the default zoom factor, for example: 1*
  2870.         The popup won't shrink below the image's natural size or window size for bigger mages.
  2871.         ${scalesHint}
  2872.       `)}">Custom scale factors to use if “zooms to” is set to “custom”:
  2873.         <input id=scales placeholder="${scalesHint}">
  2874.       </label>
  2875.     </li>
  2876.     <li class="options row">
  2877.       <label><input type=checkbox id=center>Always centered</label>
  2878.       <label title="Disable only if you spoof the HTTP headers yourself">
  2879.         <input type=checkbox id=xhr>Anti-hotlinking workaround
  2880.       </label>
  2881.       <label><input type=checkbox id=preload>Start preloading immediately</label>
  2882.       <label><input type=checkbox id=imgtab>Run in image tabs</label>
  2883.       <label title="Don't enable unless you explicitly use it in your custom CSS">
  2884.         <input type=checkbox id=globalStatus>Expose status on &lt;html&gt; node (may cause slowdowns)
  2885.       </label>
  2886.     </li>
  2887.     <li>
  2888.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>
  2889.       e.g. <code>#mpiv-popup.mpiv-show { animation: none }</code>
  2890.       <a href="#" id=reveal style="float: right"
  2891.          title="You can copy parts of it to override them in your custom CSS">
  2892.          View the built-in CSS</a>
  2893.       <div class=column>
  2894.         <textarea id=css spellcheck=false></textarea>
  2895.         <textarea id=cssApp spellcheck=false hidden readonly rows=30></textarea>
  2896.       </div>
  2897.     </li>
  2898.     <li style="display: flex; justify-content: space-between;">
  2899.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  2900.       <div style="white-space: nowrap">
  2901.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  2902.         in "d" value, for example <code>"d": "!foo.com"</code>
  2903.       </div>
  2904.       <div>
  2905.         <input id=search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  2906.       </div>
  2907.     </li>
  2908.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  2909.       <div id=rules class=column>
  2910.         <textarea rows=1 spellcheck=false></textarea>
  2911.       </div>
  2912.     </li>
  2913.     <li>
  2914.       <div hidden id=installLoading>Loading...</div>
  2915.       <div hidden id=installHint>Double-click the rule (or select and press Enter) to add it.
  2916.         Click <code>Apply</code> or <code>Save</code> to confirm.</div>
  2917.       <a href="${MPIV_BASE_URL}more_host_rules.html" id=install>Install rule from repository...</a>
  2918.     </li>
  2919.   </ul>
  2920.   <div style="text-align:center">
  2921.     <button id=ok accesskey=s>Save</button>
  2922.     <button id=apply accesskey=a>Apply</button>
  2923.     <button id=import style="margin-right: 0">Import</button>
  2924.     <button id=export style="margin-left: 0">Export</button>
  2925.     <button id=cancel>Cancel</button>
  2926.     <div id=exportNotification hidden>Copied to clipboard.</div>
  2927.   </div>
  2928. </main>
  2929.     `;
  2930.     // rules
  2931.     const rules = UI.rules;
  2932.     rules.addEventListener('input', checkRule);
  2933.     rules.addEventListener('focusin', focusRule);
  2934.     rules.addEventListener('paste', focusRule);
  2935.     blankRuleElement =
  2936.       setup.blankRuleElement =
  2937.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2938.     for (const rule of config.hosts || []) {
  2939.       const el = blankRuleElement.cloneNode();
  2940.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2941.       rules.appendChild(el);
  2942.       checkRule({target: el});
  2943.     }
  2944.     // search rules
  2945.     const search = UI.search;
  2946.     search.oninput = () => {
  2947.       setup.search = search.value;
  2948.       const s = search.value.toLowerCase();
  2949.       for (const el of rules.children)
  2950.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2951.     };
  2952.     search.value = setup.search || '';
  2953.     if (search.value)
  2954.       search.oninput();
  2955.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2956.     // which may happen since it sees only the outer <div> in the event |target|
  2957.     root.addEventListener('keydown', e =>
  2958.       !e.altKey && !e.ctrlKey && !e.metaKey && e.stopPropagation(), true);
  2959.     UI.apply.onclick = UI.cancel.onclick = UI.ok.onclick = UI.x.onclick = closeSetup;
  2960.     UI.css.value = config.css;
  2961.     UI.delay.value = config.delay;
  2962.     UI.export.onclick = exportSettings;
  2963.     UI.fit.value = config.fit;
  2964.     UI.import.onclick = importSettings;
  2965.     UI.install.onclick = setupRuleInstaller;
  2966.     const {/** @type {HTMLTextAreaElement} */ cssApp} = UI;
  2967.     UI.reveal.onclick = e => {
  2968.       e.preventDefault();
  2969.       cssApp.hidden = !cssApp.hidden;
  2970.       if (!cssApp.hidden) {
  2971.         if (!cssApp.value) {
  2972.           App.updateStyles();
  2973.           cssApp.value = App.globalStyle.trim();
  2974.           cssApp.setSelectionRange(0, 0);
  2975.         }
  2976.         cssApp.focus();
  2977.       }
  2978.     };
  2979.     UI.scale.value = config.scale;
  2980.     UI.start.value = config.start;
  2981.     UI.start.onchange = function () {
  2982.       UI.delay.closest('label').hidden =
  2983.         UI.preload.closest('label').hidden =
  2984.           this.value !== 'auto';
  2985.     };
  2986.     UI.start.onchange();
  2987.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2988.     UI.zoom.value = config.zoom;
  2989.     UI.zoomOut.value = config.zoomOut;
  2990.     for (const el of $$('[type="checkbox"]', root))
  2991.       el.checked = config[el.id];
  2992.     for (const el of $$('a[href^="http"]', root)) {
  2993.       el.target = '_blank';
  2994.       el.rel = 'noreferrer noopener external';
  2995.     }
  2996.     renderCustomScales(config);
  2997.     doc.body.appendChild(elConfig);
  2998.     requestAnimationFrame(() => {
  2999.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  3000.     });
  3001.   }
  3002. }
  3003.  
  3004. async function setupRuleInstaller(e) {
  3005.   dropEvent(e);
  3006.   const parent = this.parentElement;
  3007.   parent.children.installLoading.hidden = false;
  3008.   this.remove();
  3009.   let rules;
  3010.  
  3011.   try {
  3012.     rules = extractRules((await Remoting.getDoc(this.href)).doc);
  3013.     const selector = $create('select', {
  3014.       size: 8,
  3015.       style: 'width: 100%',
  3016.       ondblclick: e => e.target !== selector && maybeSetup(e),
  3017.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3018.     });
  3019.     selector.append(...rules.map(renderRule));
  3020.     selector.selectedIndex = findMatchingRuleIndex();
  3021.     // remove "name" since the installed rules don't need it
  3022.     for (const r of rules)
  3023.       delete r.name;
  3024.     parent.children.installLoading.remove();
  3025.     parent.children.installHint.hidden = false;
  3026.     parent.appendChild(selector);
  3027.   } catch (e) {
  3028.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3029.   }
  3030.  
  3031.   function extractRules(doc) {
  3032.     const code = $('script', doc).textContent;
  3033.     // sort by name
  3034.     return JSON.parse(code.match(/var\s+rules\s*=\s*(\[.+]);?[\r\n]/)[1])
  3035.       .filter(r => !r.d || hostname.includes(r.d))
  3036.       .sort((a, b) =>
  3037.         (a = a.name.toLowerCase()) < (b = b.name.toLowerCase()) ? -1 :
  3038.           a > b ? 1 :
  3039.             0);
  3040.   }
  3041.  
  3042.   function findMatchingRuleIndex() {
  3043.     // get the core part of the current domain that's not "www", "m", etc.
  3044.     const h = hostname.split('.');
  3045.     const core = h[0] === 'www' || h.length > 2 && h[0].length === 1 ? h[1] : h[0];
  3046.     // find a rule matching the domain core
  3047.     return rules.findIndex(r =>
  3048.       r.name.toLowerCase().includes(core) ||
  3049.       r.d && hostname.includes(r.d));
  3050.   }
  3051.  
  3052.   function renderRule(r) {
  3053.     const {name, ...copy} = r;
  3054.     return $create('option', {
  3055.       textContent: name,
  3056.       title: Ruler.format(copy, {expand: true})
  3057.         .replace(/^{|\s*}$/g, '')
  3058.         .split('\n')
  3059.         .slice(0, 12)
  3060.         .map(renderTitleLine)
  3061.         .filter(Boolean)
  3062.         .join('\n'),
  3063.     });
  3064.   }
  3065.  
  3066.   function renderTitleLine(line, i, arr) {
  3067.     return (
  3068.       // show ... on 10th line if there are more lines
  3069.       i === 9 && arr.length > 10 ? '...' :
  3070.         i > 10 ? '' :
  3071.           // truncate to 100 chars
  3072.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3073.             // strip the leading space
  3074.             .replace(/^\s/, ''));
  3075.   }
  3076.  
  3077.   function maybeSetup(e) {
  3078.     if (!e.altKey && !e.ctrlKey && !e.shiftKey && !e.metaKey)
  3079.       setup({rule: rules[e.currentTarget.selectedIndex]});
  3080.   }
  3081. }
  3082.  
  3083. App.init();