☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2021-03-16 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Mouseover Popup Image Viewer
  3. // @namespace   https://github.com/tophf
  4. // @description Shows images and videos behind links and thumbnails.
  5. //
  6. // @include     *
  7. //
  8. // @grant       GM_download
  9. // @grant       GM_getValue
  10. // @grant       GM_openInTab
  11. // @grant       GM_registerMenuCommand
  12. // @grant       GM_setClipboard
  13. // @grant       GM_setValue
  14. // @grant       GM_xmlhttpRequest
  15. //
  16. // @grant       GM.getValue
  17. // @grant       GM.openInTab
  18. // @grant       GM.registerMenuCommand
  19. // @grant       GM.setClipboard
  20. // @grant       GM.setValue
  21. // @grant       GM.xmlHttpRequest
  22. //
  23. // @version     1.2.1
  24. // @author      tophf
  25. //
  26. // @original-version 2017.9.29
  27. // @original-author  kuehlschrank
  28. //
  29. // @connect     *
  30. // CSP check:
  31. // @connect     self
  32. // rule installer in config dialog:
  33. // @connect     github.com
  34. // big/trusted hostings for the built-in rules with "q":
  35. // @connect     deviantart.com
  36. // @connect     facebook.com
  37. // @connect     fbcdn.com
  38. // @connect     flickr.com
  39. // @connect     gfycat.com
  40. // @connect     googleusercontent.com
  41. // @connect     gyazo.com
  42. // @connect     imgur.com
  43. // @connect     instagr.am
  44. // @connect     instagram.com
  45. // @connect     prnt.sc
  46. // @connect     prntscr.com
  47. // @connect     user-images.githubusercontent.com
  48. //
  49. // @supportURL  https://github.com/tophf/mpiv/issues
  50. // @icon        https://github.com/tophf/mpiv/raw/master/icon.png
  51. // ==/UserScript==
  52.  
  53. 'use strict';
  54.  
  55. //#region Globals
  56.  
  57. /** @type mpiv.Config */
  58. let cfg;
  59. /** @type mpiv.AppInfo */
  60. let ai = {rule: {}};
  61. /** @type Element */
  62. let elConfig;
  63.  
  64. const doc = document;
  65. const hostname = location.hostname;
  66. const dotDomain = '.' + hostname;
  67. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  68. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  69. const isFF = CSS.supports('-moz-appearance', 'none');
  70. const AudioContext = window.AudioContext || function () {};
  71.  
  72. const PREFIX = 'mpiv-';
  73. const STATUS_ATTR = `${PREFIX}status`;
  74. const MSG = Object.assign({}, ...[
  75.   'getViewSize',
  76.   'viewSize',
  77. ].map(k => ({[k]: `${PREFIX}${k}`})));
  78. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  79. // time for volatile things to settle down meanwhile we postpone action
  80. // examples: loading image from cache, quickly moving mouse over one element to another
  81. const SETTLE_TIME = 50;
  82. // used to detect JS code in host rules
  83. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  84. const RX_MEDIA_URL = /^[^?]+?\.(bmp|jpe?g?|gif|mp4|png|svg|web[mp])($|\?)/i;
  85. const ZOOM_MAX = 16;
  86. const SYM_U = Symbol('u');
  87.  
  88. //#endregion
  89. //#region GM4 polyfill
  90.  
  91. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  92.   this.GM = {info: GM_info};
  93. if (!GM.getValue)
  94.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  95. if (!GM.setValue)
  96.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  97. if (!GM.openInTab)
  98.   GM.openInTab = GM_openInTab;
  99. if (!GM.registerMenuCommand)
  100.   GM.registerMenuCommand = GM_registerMenuCommand;
  101. if (!GM.setClipboard)
  102.   GM.setClipboard = GM_setClipboard;
  103. if (!GM.xmlHttpRequest)
  104.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  105.  
  106. //#endregion
  107.  
  108. const App = {
  109.  
  110.   isEnabled: true,
  111.   isImageTab: false,
  112.   globalStyle: '',
  113.   popupStyleBase: '',
  114.  
  115.   activate(info, event) {
  116.     const {match, node, rule, url} = info;
  117.     if (elConfig) console.info({node, rule, url, match});
  118.     if (ai.node) App.deactivate();
  119.     ai = info;
  120.     ai.force = event.ctrlKey;
  121.     ai.gNum = 0;
  122.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  123.     Util.suppressTooltip();
  124.     Calc.updateViewSize();
  125.     Events.toggle(true);
  126.     Events.trackMouse(event);
  127.     if (CspSniffer.init && location.protocol === 'https:')
  128.       CspSniffer.init();
  129.     if (ai.force) {
  130.       App.start();
  131.     } else if (cfg.start === 'auto' && !rule.manual) {
  132.       App.belate();
  133.     } else {
  134.       Status.set('ready');
  135.     }
  136.   },
  137.  
  138.   belate() {
  139.     if (cfg.preload) {
  140.       ai.preloadStart = now();
  141.       App.start();
  142.       Status.set('+preloading');
  143.       setTimeout(Status.set, cfg.delay, '-preloading');
  144.     } else {
  145.       ai.timer = setTimeout(App.start, cfg.delay);
  146.     }
  147.   },
  148.  
  149.   checkImageTab() {
  150.     const el = doc.body.firstElementChild;
  151.     App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  152.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  153.   },
  154.  
  155.   checkProgress({start} = {}) {
  156.     const p = ai.popup;
  157.     if (!p)
  158.       return;
  159.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  160.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  161.     if (h)
  162.       return App.canCommit(w, h);
  163.     if (start) {
  164.       clearInterval(ai.timerProgress);
  165.       ai.timerProgress = setInterval(App.checkProgress, 150);
  166.     }
  167.   },
  168.  
  169.   canCommit(w, h) {
  170.     if (!ai.force && ai.rect && !ai.gItems &&
  171.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  172.       App.deactivate();
  173.       return false;
  174.     }
  175.     App.stopTimers();
  176.     const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  177.     if (wait > 0) {
  178.       ai.timer = setTimeout(App.checkProgress, wait);
  179.     } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  180.       App.handleError({type: 'error'});
  181.     } else {
  182.       App.commit();
  183.     }
  184.     return true;
  185.   },
  186.  
  187.   async commit() {
  188.     const p = ai.popup;
  189.     const isDecoded = cfg.waitLoad && typeof p.decode === 'function';
  190.     if (isDecoded) {
  191.       await p.decode();
  192.       if (p !== ai.popup)
  193.         return;
  194.     }
  195.     App.updateStyles();
  196.     Calc.measurePopup();
  197.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  198.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  199.     if (willMove)
  200.       Popup.move();
  201.     Bar.updateName();
  202.     Bar.updateDetails();
  203.     Status.set(!ai.popupLoaded && 'loading');
  204.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  205.                ai.nheight > p.clientHeight + ai.extras.h;
  206.     if (ai.large) {
  207.       Status.set('+large');
  208.       // prevent a blank bg+border in FF
  209.       if (isFF && p.complete && !isDecoded)
  210.         p.style.backgroundImage = `url('${p.src}')`;
  211.     }
  212.   },
  213.  
  214.   deactivate({wait} = {}) {
  215.     App.stopTimers();
  216.     if (ai.req)
  217.       tryCatch.call(ai.req, ai.req.abort);
  218.     if (ai.tooltip)
  219.       ai.tooltip.node.title = ai.tooltip.text;
  220.     Status.set(false);
  221.     Bar.set(false);
  222.     Events.toggle(false);
  223.     Popup.destroy();
  224.     if (wait) {
  225.       App.isEnabled = false;
  226.       setTimeout(App.enable, 200);
  227.     }
  228.     ai = {rule: {}};
  229.   },
  230.  
  231.   enable() {
  232.     App.isEnabled = true;
  233.   },
  234.  
  235.   handleError(e, rule = ai.rule) {
  236.     if (rule && rule.onerror === 'skip')
  237.       return;
  238.     const fe = Util.formatError(e, rule);
  239.     if (!rule || !ai.urls || !ai.urls.length)
  240.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  241.     if (ai.urls && ai.urls.length) {
  242.       ai.url = ai.urls.shift();
  243.       if (ai.url) {
  244.         App.stopTimers();
  245.         App.startSingle();
  246.       } else {
  247.         App.deactivate();
  248.       }
  249.     } else if (ai.node) {
  250.       Status.set('error');
  251.       Bar.set(fe.message, 'error');
  252.     }
  253.   },
  254.  
  255.   /** @param {MessageEvent} e */
  256.   onMessage(e) {
  257.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  258.       for (const el of doc.getElementsByTagName('iframe')) {
  259.         if (el.contentWindow === e.source) {
  260.           const [w, h] = Calc.frameSize(el, window);
  261.           e.source.postMessage(`${MSG.viewSize}:${w}:${h}`, '*');
  262.           return;
  263.         }
  264.       }
  265.     }
  266.   },
  267.  
  268.   /** @param {MessageEvent} e */
  269.   onMessageChild(e) {
  270.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  271.       window.removeEventListener('message', App.onMessageChild);
  272.       const [w, h] = e.data.split(':').slice(1).map(parseFloat);
  273.       if (w && h) ai.view = {w, h};
  274.     }
  275.   },
  276.  
  277.   start() {
  278.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  279.     if (!Util.isHovered(ai.node)) {
  280.       App.deactivate();
  281.       return;
  282.     }
  283.     App.updateStyles();
  284.     if (ai.gallery)
  285.       App.startGallery();
  286.     else
  287.       App.startSingle();
  288.   },
  289.  
  290.   startSingle() {
  291.     Status.loading();
  292.     ai.imageUrl = null;
  293.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  294.       Remoting.findRedirect();
  295.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  296.       App.startFromQ();
  297.     } else {
  298.       Popup.create(ai.url);
  299.       Ruler.runC();
  300.     }
  301.   },
  302.  
  303.   async startFromQ() {
  304.     try {
  305.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  306.       const url = Ruler.runQ(responseText, doc, finalUrl);
  307.       if (!url)
  308.         throw 'The "q" rule did not produce any URL.';
  309.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  310.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  311.         if (!info || !info.url)
  312.           throw `Couldn't follow URL: ${url}`;
  313.         Object.assign(ai, info);
  314.         App.startSingle();
  315.       } else {
  316.         Popup.create(url, finalUrl);
  317.         Ruler.runC(responseText, doc);
  318.       }
  319.     } catch (e) {
  320.       App.handleError(e);
  321.     }
  322.   },
  323.  
  324.   async startGallery() {
  325.     Status.loading();
  326.     try {
  327.       const startUrl = ai.url;
  328.       const p = ai.rule.s === 'gallery' ? {} : await Remoting.getDoc(startUrl);
  329.       const items = await new Promise(resolve => {
  330.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node,
  331.           resolve);
  332.         if (Array.isArray(it))
  333.           resolve(it);
  334.       });
  335.       // bail out if the gallery's async callback took too long
  336.       if (ai.url !== startUrl) return;
  337.       ai.gNum = items.length;
  338.       ai.gItems = items.length && items;
  339.       if (ai.gItems) {
  340.         const i = items.index;
  341.         ai.gIndex = i === (i | 0) && items[i] ? i | 0 :
  342.           typeof i === 'string' ? clamp(items.findIndex(x => x.url === i), 0) :
  343.             Gallery.findIndex(ai.url);
  344.         setTimeout(Gallery.next);
  345.       } else {
  346.         throw 'Empty gallery';
  347.       }
  348.     } catch (e) {
  349.       App.handleError(e);
  350.     }
  351.   },
  352.  
  353.   stopTimers() {
  354.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  355.       clearTimeout(ai[timer]);
  356.     clearInterval(ai.timerProgress);
  357.   },
  358.  
  359.   toggleZoom({keepScale} = {}) {
  360.     const p = ai.popup;
  361.     if (!p || !ai.scales || ai.scales.length < 2)
  362.       return;
  363.     ai.zoomed = !ai.zoomed;
  364.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  365.     if (ai.zooming)
  366.       p.classList.add(`${PREFIX}zooming`);
  367.     Popup.move();
  368.     Bar.updateDetails();
  369.     Status.set(ai.zoomed ? 'zoom' : false);
  370.     return ai.zoomed;
  371.   },
  372.  
  373.   updateStyles() {
  374.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  375.     Util.addStyle('rule', ai.rule.css || '');
  376.   },
  377. };
  378.  
  379. const Bar = {
  380.  
  381.   set(label, className) {
  382.     let b = ai.bar;
  383.     if (typeof label !== 'string') {
  384.       $remove(b);
  385.       ai.bar = null;
  386.       return;
  387.     }
  388.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  389.     App.updateStyles();
  390.     Bar.updateDetails();
  391.     Bar.show();
  392.     b.innerHTML = label;
  393.     if (!b.parentNode) {
  394.       doc.body.appendChild(b);
  395.       Util.forceLayout(b);
  396.     }
  397.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  398.   },
  399.  
  400.   show(isForced) {
  401.     clearTimeout(ai.timerBar);
  402.     ai.bar.style.removeProperty('opacity');
  403.     if (isForced)
  404.       ai.bar.dataset.force = '';
  405.     else
  406.       ai.timerBar = setTimeout(Bar.hide, 3000);
  407.   },
  408.  
  409.   hide(isForced) {
  410.     if (ai.bar && (isForced || !ai.bar.dataset.force)) {
  411.       $css(ai.bar, {opacity: 0});
  412.       delete ai.bar.dataset.force;
  413.     }
  414.   },
  415.  
  416.   updateName() {
  417.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  418.     if (gi) {
  419.       const item = gi[i];
  420.       const noDesc = !gi.some(_ => _.desc);
  421.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  422.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  423.         item.desc,
  424.       ].filter(Boolean).join(' - ')}`;
  425.       Bar.set(c.trim() || ' ', 'gallery', true);
  426.     } else if ('caption' in ai) {
  427.       Bar.set(ai.caption, 'caption');
  428.     } else if (ai.tooltip) {
  429.       Bar.set(ai.tooltip.text, 'tooltip');
  430.     } else {
  431.       Bar.set(' ', 'info');
  432.     }
  433.   },
  434.  
  435.   updateDetails() {
  436.     if (!ai.bar) return;
  437.     const r = ai.rotate;
  438.     const zoom = ai.nwidth && `${
  439.       Math.round(ai.scale * 100)
  440.     }%${
  441.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  442.     }${
  443.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  444.     }, ${
  445.       ai.nwidth
  446.     } x ${
  447.       ai.nheight
  448.     } px, ${
  449.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  450.     } MP`.replace(/\x20/g, '\xA0');
  451.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  452.       if (zoom) ai.bar.dataset.zoom = zoom;
  453.       else delete ai.bar.dataset.zoom;
  454.       Bar.show();
  455.     }
  456.   },
  457. };
  458.  
  459. const Calc = {
  460.  
  461.   frameSize(elFrame, parentWindow) {
  462.     if (!elFrame) return;
  463.     const r = elFrame.getBoundingClientRect();
  464.     const w = clamp(r.width, 0, parentWindow.innerWidth - r.left);
  465.     const h = clamp(r.height, 0, parentWindow.innerHeight - r.top);
  466.     return [w, h];
  467.   },
  468.  
  469.   generateScales(fit) {
  470.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  471.     const zoomStep = cfg.zoomStep / 100;
  472.     const arr = [scale];
  473.     if (fit !== 1) {
  474.       const diff = goal / scale;
  475.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  476.       const step = steps && Math.pow(diff, 1 / steps);
  477.       for (let i = steps; --i > 0;)
  478.         arr.push((scale *= step));
  479.       arr.push(scale = goal);
  480.     }
  481.     while ((scale *= zoomStep) <= ZOOM_MAX)
  482.       arr.push(scale);
  483.     return arr;
  484.   },
  485.  
  486.   measurePopup() {
  487.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  488.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  489.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  490.     if (p.clientWidth > nw) {
  491.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  492.       nh = ai.nheight = w / nw * nh | 0;
  493.       nw = ai.nwidth = w;
  494.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  495.     }
  496.     p.className = `${PREFIX}show`;
  497.     p.removeAttribute('style');
  498.     const s = getComputedStyle(p);
  499.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  500.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  501.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  502.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  503.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  504.     ai.extras = {
  505.       inw, inh,
  506.       outw, outh,
  507.       o: o2 / 2,
  508.       w: inw + outw,
  509.       h: inh + outh,
  510.     };
  511.     const fit = Math.min(
  512.       (ai.view.w - ai.extras.w) / ai.nwidth,
  513.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  514.     const isCustom = !cfg.fit && cfg.scales.length;
  515.     let cutoff = Math.min(1, fit);
  516.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  517.     if (isCustom) {
  518.       const dst = [];
  519.       for (const scale of cfg.scales) {
  520.         const val = parseFloat(scale) || fit;
  521.         dst.push(val);
  522.         if (isCustom && typeof scale === 'string') {
  523.           if (scale.includes('!')) cutoff = val;
  524.           if (scale.includes('*')) scaleZoom = val;
  525.         }
  526.       }
  527.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  528.     } else {
  529.       ai.scales = Calc.generateScales(fit);
  530.     }
  531.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  532.     ai.scaleFit = fit;
  533.     ai.scaleZoom = scaleZoom;
  534.   },
  535.  
  536.   rect() {
  537.     let {node, rule} = ai;
  538.     let n = rule.rect && node.closest(rule.rect);
  539.     if (n) return n.getBoundingClientRect();
  540.     const nested = node.getElementsByTagName('*');
  541.     let maxArea = 0;
  542.     let maxBounds;
  543.     n = node;
  544.     for (let i = 0; n; n = nested[i++]) {
  545.       const bounds = n.getBoundingClientRect();
  546.       const area = bounds.width * bounds.height;
  547.       if (area > maxArea) {
  548.         maxArea = area;
  549.         maxBounds = bounds;
  550.         node = n;
  551.       }
  552.     }
  553.     return maxBounds;
  554.   },
  555.  
  556.   scaleBiggerThan(scale, i, arr) {
  557.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  558.   },
  559.  
  560.   scaleIndex(dir) {
  561.     const i = ai.scales.indexOf(ai.scale);
  562.     if (i >= 0) return i + dir;
  563.     for (
  564.       let len = ai.scales.length,
  565.         i = dir > 0 ? 0 : len - 1;
  566.       i >= 0 && i < len;
  567.       i += dir
  568.     ) {
  569.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  570.         return i;
  571.     }
  572.     return -1;
  573.   },
  574.  
  575.   scaleForFirstZoom(keepScale) {
  576.     const z = ai.scaleZoom;
  577.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  578.   },
  579.  
  580.   updateViewSize() {
  581.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  582.     ai.view = {
  583.       w: view.clientWidth,
  584.       h: view.clientHeight,
  585.     };
  586.     if (window === top) return;
  587.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  588.     if (w && h) {
  589.       ai.view = {w, h};
  590.     } else {
  591.       window.addEventListener('message', App.onMessageChild);
  592.       parent.postMessage(MSG.getViewSize, '*');
  593.     }
  594.   },
  595. };
  596.  
  597. /** @namespace mpiv.Config */
  598. class Config {
  599.  
  600.   constructor({data: c, save}) {
  601.     if (typeof c === 'string')
  602.       c = tryCatch(JSON.parse, c);
  603.     if (typeof c !== 'object' || !c)
  604.       c = {};
  605.     const {/** @type mpiv.Config */ DEFAULTS} = Config;
  606.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  607.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  608.         '';
  609.     if (c.version !== DEFAULTS.version) {
  610.       if (typeof c.hosts === 'string')
  611.         c.hosts = c.hosts.split('\n')
  612.           .map(s => tryCatch(JSON.parse, s) || s)
  613.           .filter(Boolean);
  614.       if (c.close === true || c.close === false)
  615.         c.zoomOut = c.close ? 'auto' : 'stay';
  616.       for (const key in DEFAULTS)
  617.         if (typeof c[key] !== typeof DEFAULTS[key])
  618.           c[key] = DEFAULTS[key];
  619.       if (c.version === 3 && c.scales[0] === 0)
  620.         c.scales[0] = '0!';
  621.       for (const key in c)
  622.         if (!(key in DEFAULTS))
  623.           delete c[key];
  624.       c.version = DEFAULTS.version;
  625.       if (save)
  626.         GM.setValue('cfg', c);
  627.     }
  628.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  629.       App.globalStyle = '';
  630.     if (!Array.isArray(c.scales))
  631.       c.scales = [];
  632.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  633.     Object.assign(this, DEFAULTS, c);
  634.   }
  635.  
  636.   static async load(opts) {
  637.     opts.data = await GM.getValue('cfg');
  638.     return new Config(opts);
  639.   }
  640.  
  641.   _getCss() {
  642.     const {css} = this;
  643.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  644.   }
  645. }
  646.  
  647. Config.DEFAULTS = /** @type mpiv.Config */ Object.assign(Object.create(null), {
  648.   center: false,
  649.   css: '',
  650.   delay: 500,
  651.   fit: '',
  652.   globalStatus: false,
  653.   // prefer ' inside rules because " will be displayed as \"
  654.   // example: "img[src*='icon']"
  655.   hosts: [{
  656.     name: 'No popup for YouTube thumbnails',
  657.     d: 'www.youtube.com',
  658.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  659.     s: '',
  660.   }, {
  661.     name: 'No popup for SVG/PNG icons',
  662.     d: '',
  663.     e: "img[src*='icon']",
  664.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  665.     s: '',
  666.   }],
  667.   imgtab: false,
  668.   mute: false,
  669.   preload: false,
  670.   scale: 1.25,
  671.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  672.   start: 'auto',
  673.   uiBackgroundColor: '#ffffff',
  674.   uiBackgroundOpacity: 100,
  675.   uiBorderColor: '#000000',
  676.   uiBorderOpacity: 100,
  677.   uiBorder: 0,
  678.   uiFadein: true,
  679.   uiShadowColor: '#000000',
  680.   uiShadowOpacity: 80,
  681.   uiShadow: 20,
  682.   uiPadding: 0,
  683.   uiMargin: 0,
  684.   version: 6,
  685.   waitLoad: false,
  686.   xhr: true,
  687.   zoom: 'context',
  688.   zoomOut: 'auto',
  689.   zoomStep: 133,
  690. });
  691.  
  692. const CspSniffer = {
  693.  
  694.   /** @type {?Object<string,string[]>} */
  695.   csp: null,
  696.   /** @type {?Promise<void>} */
  697.   initPending: null,
  698.   selfUrl: location.origin + '/',
  699.  
  700.   // will be null when done
  701.   init() {
  702.     this.initPending = this.initPending || new Promise(resolve => {
  703.       GM.xmlHttpRequest({
  704.         url: location.href,
  705.         method: 'HEAD',
  706.         onload: response => {
  707.           this.csp = this._parse(response);
  708.           this.init = this.initPending = null;
  709.           resolve();
  710.         },
  711.       });
  712.     });
  713.   },
  714.  
  715.   async check(url) {
  716.     await this.initPending;
  717.     const isVideo = Util.isVideoUrl(url);
  718.     let mode;
  719.     if (this.csp) {
  720.       const src = this.csp[isVideo ? 'media' : 'img'];
  721.       if (!src.some(this._srcMatches, url))
  722.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  723.     }
  724.     return [mode || ai.xhr, isVideo];
  725.   },
  726.  
  727.   _parse({responseHeaders}) {
  728.     const csp = responseHeaders.match(/(?:^|[\r\n])\s*Content-Security-Policy:([^\r\n]*)/i);
  729.     if (!csp) return;
  730.     const src = {};
  731.     const rx = /[\s;](default|img|media)-src ([^;]+)/g;
  732.     for (let m; (m = rx.exec(csp[1]));)
  733.       src[m[1]] = m[2].trim().split(/\s+/);
  734.     if (!src.img) src.img = src.default || [];
  735.     if (!src.media) src.media = src.default || [];
  736.     for (const set of [src.img, src.media]) {
  737.       set.forEach((item, i) => {
  738.         if (item !== '*' && item.includes('*')) {
  739.           set[i] = new RegExp(
  740.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  741.             item
  742.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  743.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  744.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  745.             .replace(/[^/]$/, '$&/'));
  746.         }
  747.       });
  748.     }
  749.     return src;
  750.   },
  751.  
  752.   /** @this string */
  753.   _srcMatches(src) {
  754.     return src instanceof RegExp ? src.test(this) :
  755.       src === '*' ||
  756.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  757.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  758.   },
  759. };
  760.  
  761. const Events = {
  762.  
  763.   hoverData: [],
  764.   hoverTimer: 0,
  765.  
  766.   onMouseOver(e) {
  767.     let node = e.target;
  768.     if (!App.isEnabled ||
  769.         e.shiftKey ||
  770.         ai.zoomed ||
  771.         node === ai.popup ||
  772.         node === doc.body ||
  773.         node === doc.documentElement ||
  774.         node === elConfig ||
  775.         ai.gallery && ai.rectHovered)
  776.       return;
  777.     if (node.shadowRoot)
  778.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  779.     // we don't want to process everything in the path of a quickly moving mouse cursor
  780.     Events.hoverData = [now(), e, node];
  781.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  782.   },
  783.  
  784.   onMouseOverThrottled() {
  785.     const [start, e, node] = Events.hoverData;
  786.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  787.     const wait = start + SETTLE_TIME - now();
  788.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  789.     if (Events.hoverTimer || !Util.isHovered(node))
  790.       return;
  791.     if (!Ruler.rules)
  792.       Ruler.init();
  793.     let a;
  794.     const tag = node.tagName;
  795.     const src = node.currentSrc || node.src;
  796.     const isPic = tag === 'IMG' || tag === 'VIDEO' && /\.(webm|mp4)(\?|$)/.test(src);
  797.     const info =
  798.       // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  799.       tag !== 'A' &&
  800.         RuleMatcher.find(isPic && !src.startsWith('data:') && Util.rel2abs(src), node) ||
  801.       (a = node.closest('A')) &&
  802.         RuleMatcher.findForLink(a) ||
  803.       isPic &&
  804.         {node, rule: {}, url: src};
  805.     if (info && info.url && info.node !== ai.node)
  806.       App.activate(info, e);
  807.   },
  808.  
  809.   onMouseOut(e) {
  810.     if (!e.relatedTarget && !e.shiftKey)
  811.       App.deactivate();
  812.   },
  813.  
  814.   onMouseOutShadow(e) {
  815.     const root = e.target.shadowRoot;
  816.     if (root) {
  817.       root.removeEventListener('mouseover', Events.onMouseOver);
  818.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  819.     }
  820.   },
  821.  
  822.   onMouseMove(e) {
  823.     Events.trackMouse(e);
  824.     if (e.shiftKey)
  825.       return;
  826.     if (!ai.zoomed && !ai.rectHovered) {
  827.       App.deactivate();
  828.     } else if (ai.zoomed) {
  829.       Popup.move();
  830.       const {cx, cy, view: {w, h}} = ai;
  831.       const bx = w / 6;
  832.       const by = h / 6;
  833.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  834.       Status.set(`${onEdge ? '+' : '-'}edge`);
  835.     }
  836.   },
  837.  
  838.   onMouseDown({shiftKey, button}) {
  839.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  840.       ai.controlled = ai.zoomed = true;
  841.     } else if (button === 2 || shiftKey) {
  842.       // we ignore RMB and Shift
  843.     } else {
  844.       App.deactivate({wait: true});
  845.       doc.addEventListener('mouseup', App.enable, {once: true});
  846.     }
  847.   },
  848.  
  849.   onMouseScroll(e) {
  850.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  851.     if (ai.zoomed) {
  852.       Events.zoomInOut(dir);
  853.     } else if (ai.gNum > 1 && ai.popup) {
  854.       Gallery.next(-dir);
  855.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  856.       App.toggleZoom();
  857.     } else {
  858.       App.deactivate();
  859.       return;
  860.     }
  861.     dropEvent(e);
  862.   },
  863.  
  864.   onKeyDown(e) {
  865.     const key = eventModifiers(e) + (e.key.length > 1 ? e.key : e.code);
  866.     const p = ai.popup;
  867.     switch (key) {
  868.       case '+Shift':
  869.         if (ai.shiftKeyTime)
  870.           return;
  871.         ai.shiftKeyTime = now();
  872.         Status.set('+shift');
  873.         Bar.show(true);
  874.         if (p && p.tagName === 'VIDEO')
  875.           p.controls = true;
  876.         return;
  877.       case '^Control':
  878.         if (!p && (cfg.start !== 'auto' || ai.rule.manual))
  879.           App.start();
  880.         return;
  881.       case 'ArrowRight':
  882.       case 'KeyJ':
  883.         Gallery.next(1);
  884.         break;
  885.       case 'ArrowLeft':
  886.       case 'KeyK':
  887.         Gallery.next(-1);
  888.         break;
  889.       case 'KeyD':
  890.         Remoting.saveFile();
  891.         break;
  892.       case 'KeyH': // flip horizontally
  893.       case 'KeyV': // flip vertically
  894.       case 'KeyL': // rotate left
  895.       case 'KeyR': // rotate right
  896.         if (!p)
  897.           return;
  898.         if (key === 'KeyH' || key === 'KeyV') {
  899.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  900.           ai[side] = !ai[side];
  901.         } else {
  902.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  903.         }
  904.         Bar.updateDetails();
  905.         Popup.move();
  906.         break;
  907.       case 'KeyM':
  908.         if (p && p.tagName === 'VIDEO')
  909.           p.muted = !p.muted;
  910.         break;
  911.       case 'KeyT':
  912.         GM.openInTab(Util.tabFixUrl() || p.src);
  913.         App.deactivate();
  914.         break;
  915.       case 'Minus':
  916.       case 'NumpadSubtract':
  917.         if (ai.zoomed) {
  918.           Events.zoomInOut(-1);
  919.         } else {
  920.           App.toggleZoom();
  921.         }
  922.         break;
  923.       case 'Equal':
  924.       case 'NumpadAdd':
  925.         if (ai.zoomed) {
  926.           Events.zoomInOut(1);
  927.         } else {
  928.           App.toggleZoom();
  929.         }
  930.         break;
  931.       case 'Escape':
  932.         App.deactivate({wait: true});
  933.         break;
  934.       case '!Alt':
  935.         return;
  936.       default:
  937.         App.deactivate({wait: true});
  938.         return;
  939.     }
  940.     dropEvent(e);
  941.   },
  942.  
  943.   onKeyUp(e) {
  944.     if (e.key === 'Shift') {
  945.       Status.set('-shift');
  946.       Bar.hide(true);
  947.       if ((ai.popup || {}).controls)
  948.         ai.popup.controls = false;
  949.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  950.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  951.         ai.controlled = false;
  952.       else if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  953.         App.toggleZoom();
  954.       else
  955.         App.deactivate({wait: true});
  956.       ai.shiftKeyTime = 0;
  957.     }
  958.   },
  959.  
  960.   onContext(e) {
  961.     if (e.shiftKey) return;
  962.     if (cfg.zoom === 'context' && ai.popup && App.toggleZoom()) {
  963.       dropEvent(e);
  964.     } else if (!ai.popup && (cfg.start === 'context' || (cfg.start === 'auto' && ai.rule.manual))) {
  965.       App.start();
  966.       dropEvent(e);
  967.     } else {
  968.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  969.     }
  970.   },
  971.  
  972.   pierceShadow(node, x, y) {
  973.     for (let root; (root = node.shadowRoot);) {
  974.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  975.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  976.       const inner = root.elementFromPoint(x, y);
  977.       if (!inner || inner === node)
  978.         break;
  979.       node = inner;
  980.     }
  981.     return node;
  982.   },
  983.  
  984.   toggle(enable) {
  985.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  986.     const passive = enable ? {passive: true} : undefined;
  987.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  988.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  989.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  990.     onOff.call(doc, 'contextmenu', Events.onContext);
  991.     onOff.call(doc, 'keydown', Events.onKeyDown, true); // override normal page listeners
  992.     onOff.call(doc, 'keyup', Events.onKeyUp);
  993.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  994.   },
  995.  
  996.   trackMouse(e) {
  997.     const cx = ai.cx = e.clientX;
  998.     const cy = ai.cy = e.clientY;
  999.     const r = ai.rect || (ai.rect = Calc.rect());
  1000.     ai.rectHovered =
  1001.       cx > r.left - 2 && cx < r.right + 2 &&
  1002.       cy > r.top - 2 && cy < r.bottom + 2;
  1003.   },
  1004.  
  1005.   zoomInOut(dir) {
  1006.     const i = Calc.scaleIndex(dir);
  1007.     const n = ai.scales.length;
  1008.     if (i >= 0 && i < n)
  1009.       ai.scale = ai.scales[i];
  1010.     const zo = cfg.zoomOut;
  1011.     if (i <= 0 && zo !== 'stay') {
  1012.       if (ai.scaleFit < ai.scale * .99) {
  1013.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1014.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1015.         App.deactivate({wait: true});
  1016.         return;
  1017.       }
  1018.       ai.zoomed = zo !== 'unzoom';
  1019.     } else {
  1020.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1021.     }
  1022.     if (ai.zooming)
  1023.       ai.popup.classList.add(`${PREFIX}zooming`);
  1024.     Popup.move();
  1025.     Bar.updateDetails();
  1026.   },
  1027. };
  1028.  
  1029. const Gallery = {
  1030.  
  1031.   functionParams: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  1032.  
  1033.   makeParser(g) {
  1034.     return (
  1035.       typeof g === 'function' ? g :
  1036.         typeof g === 'string' ? Util.newFunction(...Gallery.functionParams, g) :
  1037.           Gallery.defaultParser
  1038.     );
  1039.   },
  1040.  
  1041.   findIndex(gUrl) {
  1042.     const sel = gUrl.split('#')[1];
  1043.     if (!sel)
  1044.       return 0;
  1045.     if (/^\d+$/.test(sel))
  1046.       return parseInt(sel);
  1047.     for (let i = ai.gNum; i--;) {
  1048.       let {url} = ai.gItems[i];
  1049.       if (Array.isArray(url))
  1050.         url = url[0];
  1051.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  1052.         return i;
  1053.     }
  1054.     return 0;
  1055.   },
  1056.  
  1057.   next(dir) {
  1058.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1059.     const item = ai.gItems[ai.gIndex];
  1060.     if (Array.isArray(item.url)) {
  1061.       ai.urls = item.url.slice(1);
  1062.       ai.url = item.url[0];
  1063.     } else {
  1064.       ai.urls = null;
  1065.       ai.url = item.url;
  1066.     }
  1067.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir || 1)].url)[0];
  1068.     App.startSingle();
  1069.     Bar.updateName();
  1070.   },
  1071.  
  1072.   nextIndex(dir) {
  1073.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1074.   },
  1075.  
  1076.   defaultParser(text, doc, docUrl, m, rule) {
  1077.     const {g} = rule;
  1078.     const qEntry = g.entry;
  1079.     const qCaption = ensureArray(g.caption);
  1080.     const qImage = g.image;
  1081.     const qTitle = g.title;
  1082.     const fix =
  1083.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1084.       (s => s.trim());
  1085.     const items = [...$$(qEntry || qImage, doc)]
  1086.       .map(processEntry)
  1087.       .filter(Boolean);
  1088.     items.title = processTitle();
  1089.     items.index =
  1090.       typeof g.index === 'string' &&
  1091.         Remoting.findImageUrl(tryCatch($, g.index, doc), docUrl) ||
  1092.       RX_HAS_CODE.test(g.index) &&
  1093.         Util.newFunction('items', 'node', g.index)(items, ai.node) ||
  1094.       g.index;
  1095.     return items;
  1096.  
  1097.     function processEntry(entry) {
  1098.       const item = {};
  1099.       try {
  1100.         const img = qEntry ? $(qImage, entry) : entry;
  1101.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  1102.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1103.       } catch (e) {}
  1104.       return item.url && item;
  1105.     }
  1106.  
  1107.     function processCaption(selector) {
  1108.       const el = $(selector, this) ||
  1109.                  $orSelf(selector, this.previousElementSibling) ||
  1110.                  $orSelf(selector, this.nextElementSibling);
  1111.       return el && fix(el.textContent);
  1112.     }
  1113.  
  1114.     function processTitle() {
  1115.       const el = $(qTitle, doc);
  1116.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1117.     }
  1118.  
  1119.     function $orSelf(selector, el) {
  1120.       if (el && !el.matches(qEntry))
  1121.         return el.matches(selector) ? el : $(selector, el);
  1122.     }
  1123.   },
  1124. };
  1125.  
  1126. const Popup = {
  1127.  
  1128.   async create(src, pageUrl) {
  1129.     Popup.destroy();
  1130.     ai.imageUrl = src;
  1131.     if (!src)
  1132.       return;
  1133.     const myAi = ai;
  1134.     let [xhr, isVideo] = await CspSniffer.check(src);
  1135.     if (ai !== myAi)
  1136.       return;
  1137.     if (xhr)
  1138.       [src, isVideo] = await Remoting.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1139.     if (ai !== myAi || !src)
  1140.       return;
  1141.     const p = ai.popup = isVideo ? await PopupVideo.create() : $create('img');
  1142.     p.id = `${PREFIX}popup`;
  1143.     p.src = src;
  1144.     p.addEventListener('error', App.handleError);
  1145.     if (ai.zooming)
  1146.       p.addEventListener('transitionend', Popup.onZoom);
  1147.     doc.body.insertBefore(p, ai.bar || undefined);
  1148.     await 0;
  1149.     if (App.checkProgress({start: true}) === false)
  1150.       return;
  1151.     if (p.complete)
  1152.       Popup.onLoad.call(ai.popup);
  1153.     else if (!isVideo)
  1154.       p.addEventListener('load', Popup.onLoad, {once: true});
  1155.   },
  1156.  
  1157.   destroy() {
  1158.     const p = ai.popup;
  1159.     if (!p) return;
  1160.     p.removeEventListener('load', Popup.onLoad);
  1161.     p.removeEventListener('error', App.handleError);
  1162.     if (typeof p.pause === 'function')
  1163.       p.pause();
  1164.     if (ai.blobUrl)
  1165.       setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1166.     p.remove();
  1167.     ai.zoomed = ai.popup = ai.popupLoaded = ai.blobUrl = null;
  1168.   },
  1169.  
  1170.   move() {
  1171.     let x, y;
  1172.     const {cx, cy, extras, view} = ai;
  1173.     const vw = view.w - extras.outw;
  1174.     const vh = view.h - extras.outh;
  1175.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1176.     const h0 = ai.scale * ai.nheight + extras.inh;
  1177.     const isSwapped = ai.rotate % 180;
  1178.     const w = isSwapped ? h0 : w0;
  1179.     const h = isSwapped ? w0 : h0;
  1180.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1181.       const r = ai.rect;
  1182.       const rx = (r.left + r.right) / 2;
  1183.       const ry = (r.top + r.bottom) / 2;
  1184.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1185.         if (h < vh - 60)
  1186.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1187.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1188.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1189.         if (w < vw - 60)
  1190.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1191.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1192.       }
  1193.     }
  1194.     if (x == null)
  1195.       x = (vw - w) * (vw > w ? .5 : clamp(5 / 3 * (cx / vw - .2), 0, 1));
  1196.     if (y == null)
  1197.       y = (vh - h) * (vh > h ? .5 : clamp(5 / 3 * (cy / vh - .2), 0, 1));
  1198.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1199.     x += extras.o - diff;
  1200.     y += extras.o + diff;
  1201.     $css(ai.popup, {
  1202.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1203.                  `rotate(${ai.rotate || 0}deg) ` +
  1204.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1205.       width: `${Math.round(w0)}px`,
  1206.       height: `${Math.round(h0)}px`,
  1207.     });
  1208.   },
  1209.  
  1210.   onLoad() {
  1211.     if (this === ai.popup) {
  1212.       this.setAttribute('loaded', '');
  1213.       ai.popupLoaded = true;
  1214.       Status.set('-loading');
  1215.       if (ai.preloadUrl) {
  1216.         $create('img', {src: ai.preloadUrl});
  1217.         ai.preloadUrl = null;
  1218.       }
  1219.     }
  1220.   },
  1221.  
  1222.   onZoom() {
  1223.     this.classList.remove(`${PREFIX}zooming`);
  1224.   },
  1225. };
  1226.  
  1227. const PopupVideo = {
  1228.   async create() {
  1229.     ai.bufBar = false;
  1230.     ai.bufStart = now();
  1231.     const shouldMute = cfg.mute || new AudioContext().state === 'suspended';
  1232.     return $create('video', {
  1233.       autoplay: true,
  1234.       controls: shouldMute,
  1235.       muted: shouldMute,
  1236.       loop: true,
  1237.       volume: clamp(+await GM.getValue('volume') || .5, 0, 1),
  1238.       onprogress: PopupVideo.progress,
  1239.       oncanplaythrough: PopupVideo.progressDone,
  1240.       onvolumechange: PopupVideo.rememberVolume,
  1241.     });
  1242.   },
  1243.  
  1244.   progress() {
  1245.     const {duration} = this;
  1246.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1247.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1248.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1249.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1250.     }
  1251.   },
  1252.  
  1253.   progressDone() {
  1254.     this.onprogress = this.oncanplaythrough = null;
  1255.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1256.       Bar.set(false);
  1257.     Popup.onLoad.call(this);
  1258.   },
  1259.  
  1260.   rememberVolume() {
  1261.     GM.setValue('volume', this.volume);
  1262.   },
  1263. };
  1264.  
  1265. const Ruler = {
  1266. /*
  1267.  'u' works only with URLs so it's ignored if 'html' is true
  1268.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1269.    |foo = url or text must start with foo
  1270.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1271.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1272.  'r' is checked only if 'u' matches first
  1273. */
  1274.   init() {
  1275.     const errors = new Map();
  1276.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1277.     for (const rule of errors.keys())
  1278.       App.handleError('Invalid custom host rule:', rule);
  1279.  
  1280.     // rules that disable previewing
  1281.     const disablers = [
  1282.       dotDomain.endsWith('.stackoverflow.com') && {
  1283.         e: '.post-tag, .post-tag img',
  1284.         s: '',
  1285.       },
  1286.       {
  1287.         u: '||disqus.com/',
  1288.         s: '',
  1289.       },
  1290.     ];
  1291.  
  1292.     // optimization: a rule is created only when on domain
  1293.     const perDomain = [
  1294.       hostname.includes('startpage') && {
  1295.         r: /\boiu=(.+)/,
  1296.         s: '$1',
  1297.         follow: true,
  1298.       },
  1299.       dotDomain.endsWith('.4chan.org') && {
  1300.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1301.         q: '.op .fileText a',
  1302.         css: '#post-preview{display:none}',
  1303.       },
  1304.       hostname.includes('amazon.') && {
  1305.         r: /.+?images\/I\/.+?\./,
  1306.         s: m => {
  1307.           const uh = doc.getElementById('universal-hover');
  1308.           return uh ? '' : m[0] + 'jpg';
  1309.         },
  1310.         css: '#zoomWindow{display:none!important;}',
  1311.       },
  1312.       dotDomain.endsWith('.bing.com') && {
  1313.         e: 'a[m*="murl"]',
  1314.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1315.         s: '$1',
  1316.         html: true,
  1317.       },
  1318.       ...dotDomain.endsWith('.deviantart.com') && [{
  1319.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1320.         s: (m, node) =>
  1321.           $propUp(node, 'data-super-full-img') ||
  1322.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1323.           node.dataset.embedId && node.src,
  1324.       }, {
  1325.         e: '.dev-view-deviation img',
  1326.         s: () => [
  1327.           $('.dev-page-download').href,
  1328.           $('.dev-content-full').src,
  1329.         ].filter(Boolean),
  1330.       }, {
  1331.         e: 'a[data-hook=deviation_link]',
  1332.         q: 'link[as=image]',
  1333.       }] || [],
  1334.       dotDomain.endsWith('.dropbox.com') && {
  1335.         r: /(.+?&size_mode)=\d+(.*)/,
  1336.         s: '$1=5$2',
  1337.       },
  1338.       dotDomain.endsWith('.facebook.com') && {
  1339.         e: 'a[href*="ref=hovercard"]',
  1340.         s: (m, node) =>
  1341.           'https://www.facebook.com/photo.php?fbid=' +
  1342.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1343.         follow: true,
  1344.       },
  1345.       dotDomain.endsWith('.facebook.com') && {
  1346.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1347.         s: (m, node) =>
  1348.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1349.             decodeURIComponent(m[4]),
  1350.         html: true,
  1351.         follow: true,
  1352.       },
  1353.       dotDomain.endsWith('.flickr.com') &&
  1354.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1355.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1356.         s: m => `https://www.flickr.com/services/rest/?${
  1357.           new URLSearchParams({
  1358.             photo_id: m[1],
  1359.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1360.             method: 'flickr.photos.getSizes',
  1361.             format: 'json',
  1362.             nojsoncallback: 1,
  1363.           }).toString()}`,
  1364.         q: text => JSON.parse(text).sizes.size.pop().source,
  1365.       },
  1366.       dotDomain.endsWith('.github.com') && {
  1367.         r: new RegExp([
  1368.           /(avatars.+?&s=)\d+/,
  1369.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1370.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1371.         ].map(rx => rx.source).join('|')),
  1372.         s: m => `https://${
  1373.           m[1] ? `${m[1]}460` :
  1374.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1375.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1376.         }`,
  1377.       },
  1378.       isGoogleImages && {
  1379.         e: 'a[href*="imgres?imgurl="] img',
  1380.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1381.         follow: true,
  1382.       },
  1383.       isGoogleImages && {
  1384.         e: '[data-tbnid] a:not([href])',
  1385.         s: (m, a) => {
  1386.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1387.           new MutationObserver((_, mo) => {
  1388.             mo.disconnect();
  1389.             App.isEnabled = true;
  1390.             a.alt = a2.innerText;
  1391.             const {left, top} = a.getBoundingClientRect();
  1392.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1393.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1394.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1395.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1396.         },
  1397.       },
  1398.       dotDomain.endsWith('.instagram.com') && {
  1399.         e: [
  1400.           'a[href*="/p/"]',
  1401.           'article [role="button"][tabindex="0"], article [role="button"][tabindex="0"] div',
  1402.         ],
  1403.         s: (m, node, rule) => {
  1404.           let data, a, n, img, src;
  1405.           if (location.pathname.startsWith('/p/')) {
  1406.             img = $('img[srcset], video', node.parentNode);
  1407.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1408.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1409.           }
  1410.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1411.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1412.             data = a && tryCatch(this._getEdge, a.pathname.split('/')[2]);
  1413.           }
  1414.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1415.           Ruler.toggle(rule, 'g', a && $('[class*="Carousel"]', a));
  1416.           rule.follow = !data && !rule.g;
  1417.           rule._data = data;
  1418.           rule._img = img;
  1419.           return (
  1420.             !a && !src ? false :
  1421.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1422.                 data.video_url || data.display_url);
  1423.         },
  1424.         c: (html, doc, node, rule) =>
  1425.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1426.         follow: true,
  1427.         _q: 'meta[property="og:video"]',
  1428.         _g(text, doc, url, m, rule) {
  1429.           const media = JSON.parse(text).graphql.shortcode_media;
  1430.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1431.             url: e.node.video_url || e.node.display_url,
  1432.           }));
  1433.           items.title = tryCatch(rule._getCaption, media) || '';
  1434.           return items;
  1435.         },
  1436.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1437.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1438.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1439.       },
  1440.       ...dotDomain.endsWith('.reddit.com') && [{
  1441.         u: '||i.reddituploads.com/',
  1442.       }, {
  1443.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1444.         s: (m, node) => $propUp(node, 'data-url'),
  1445.       }, {
  1446.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1447.         s: 'https://i$1',
  1448.       }] || [],
  1449.       dotDomain.endsWith('.tumblr.com') && {
  1450.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1451.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1452.         follow: true,
  1453.       },
  1454.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1455.         e: 'a.media-item, a.js-media-image-link',
  1456.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1457.         follow: true,
  1458.       },
  1459.       dotDomain.endsWith('.twitter.com') && {
  1460.         e: '.grid-tweet > .media-overlay',
  1461.         s: (m, node) => node.previousElementSibling.src,
  1462.         follow: true,
  1463.       },
  1464.     ];
  1465.  
  1466.     const main = [
  1467.       {
  1468.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1469.         s: '$1',
  1470.         follow: true,
  1471.         onerror: 'skip',
  1472.       },
  1473.       {
  1474.         u: [
  1475.           '||500px.com/photo/',
  1476.           '||cl.ly/',
  1477.           '||cweb-pix.com/',
  1478.           '||ibb.co/',
  1479.           '||imgcredit.xyz/image/',
  1480.         ],
  1481.         r: /\.\w+\/.+/,
  1482.         q: 'meta[property="og:image"]',
  1483.       },
  1484.       {
  1485.         u: 'attachment.php',
  1486.         r: /attachment\.php.+attachmentid/,
  1487.       },
  1488.       {
  1489.         u: '||abload.de/image',
  1490.         q: '#image',
  1491.       },
  1492.       {
  1493.         u: '||deviantart.com/art/',
  1494.         s: (m, node) =>
  1495.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1496.             '' :
  1497.             m.input,
  1498.         q: [
  1499.           '#download-button[href*=".jpg"]',
  1500.           '#download-button[href*=".jpeg"]',
  1501.           '#download-button[href*=".gif"]',
  1502.           '#download-button[href*=".png"]',
  1503.           '#gmi-ResViewSizer_fullimg',
  1504.           'img.dev-content-full',
  1505.         ],
  1506.       },
  1507.       {
  1508.         u: '||dropbox.com/s',
  1509.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1510.         q: (text, doc) =>
  1511.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1512.       },
  1513.       {
  1514.         r: /[./]ebay\.[^/]+\/itm\//,
  1515.         q: text =>
  1516.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1517.             .replace(/~~60_\d+/, '~~60_57'),
  1518.       },
  1519.       {
  1520.         u: '||i.ebayimg.com/',
  1521.         s: (m, node) =>
  1522.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1523.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1524.       },
  1525.       {
  1526.         u: '||fastpic.ru',
  1527.         e: 'a',
  1528.         q: 'img[src*="/big/"]',
  1529.         xhr: true,
  1530.       },
  1531.       {
  1532.         u: '||facebook.com/',
  1533.         r: /photo\.php|[^/]+\/photos\//,
  1534.         s: (m, node) =>
  1535.           node.id === 'fbPhotoImage' ? false :
  1536.             /gradient\.png$/.test(m.input) ? '' :
  1537.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1538.         q: [
  1539.           'div + span > a:first-child:not([href*="tag_faces"])',
  1540.           'div + span > a[href*="tag_faces"] ~ a',
  1541.         ],
  1542.         rect: '#fbProfileCover',
  1543.       },
  1544.       {
  1545.         u: '||fbcdn.',
  1546.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1547.         s: m =>
  1548.           dotDomain.endsWith('.facebook.com') &&
  1549.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1550.           false,
  1551.         manual: true,
  1552.       },
  1553.       {
  1554.         u: ['||fbcdn-', 'fbcdn.net/'],
  1555.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1556.         s: (m, node) => {
  1557.           if (node.id === 'fbPhotoImage') {
  1558.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1559.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1560.           }
  1561.           if (m[4])
  1562.             return false;
  1563.           const pn = node.parentNode;
  1564.           if (pn.outerHTML.includes('/hovercard/'))
  1565.             return '';
  1566.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1567.             return false;
  1568.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1569.         },
  1570.         rect: '.photoWrap',
  1571.       },
  1572.       {
  1573.         u: '||flickr.com/photos/',
  1574.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1575.         s: m =>
  1576.           m.input.indexOf('/sizes/') < 0 ?
  1577.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1578.             false,
  1579.         q: (text, doc) => {
  1580.           const links = $$('.sizes-list a', doc);
  1581.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1582.         },
  1583.         follow: true,
  1584.       },
  1585.       {
  1586.         u: '||flickr.com/photos/',
  1587.         r: /\/sizes\//,
  1588.         q: '#allsizes-photo > img',
  1589.       },
  1590.       {
  1591.         u: '||gfycat.com/',
  1592.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1593.         s: 'https://$1$3',
  1594.         q: [
  1595.           'meta[content$=".webm"]',
  1596.           '#webmsource',
  1597.           'source[src$=".webm"]',
  1598.         ],
  1599.       },
  1600.       {
  1601.         u: [
  1602.           '||googleusercontent.com/proxy',
  1603.           '||googleusercontent.com/gadgets/proxy',
  1604.         ],
  1605.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1606.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1607.       },
  1608.       {
  1609.         u: [
  1610.           '||googleusercontent.com/',
  1611.           '||ggpht.com/',
  1612.         ],
  1613.         s: m => m.input.includes('webcache.') ? '' :
  1614.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1615.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1616.       },
  1617.       {
  1618.         u: '||gravatar.com/',
  1619.         r: /([a-z0-9]{32})/,
  1620.         s: 'https://gravatar.com/avatar/$1?s=200',
  1621.       },
  1622.       {
  1623.         u: '//gyazo.com/',
  1624.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1625.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1626.         _q: 'meta[name="twitter:image"]',
  1627.       },
  1628.       {
  1629.         u: '||hostingkartinok.com/show-image.php',
  1630.         q: '.image img',
  1631.       },
  1632.       {
  1633.         u: [
  1634.           '||imagecurl.com/images/',
  1635.           '||imagecurl.com/viewer.php',
  1636.         ],
  1637.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1638.         s: 'https://imagecurl.com/images/$1$2$3',
  1639.       },
  1640.       {
  1641.         u: '||imagebam.com/image/',
  1642.         q: 'meta[property="og:image"]',
  1643.         tabfix: true,
  1644.         xhr: hostname.includes('planetsuzy'),
  1645.       },
  1646.       {
  1647.         u: '||imageban.ru/thumbs',
  1648.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1649.         s: '$1out$2/$3/$4',
  1650.       },
  1651.       {
  1652.         u: [
  1653.           '||imageban.ru/show',
  1654.           '||imageban.net/show',
  1655.           '||ibn.im/',
  1656.         ],
  1657.         q: '#img_main',
  1658.       },
  1659.       {
  1660.         u: '||imageshack.us/img',
  1661.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1662.         s: 'https://$2/download/$1/$3$4',
  1663.       },
  1664.       {
  1665.         u: '||imageshack.us/i/',
  1666.         q: '#share-dl',
  1667.       },
  1668.       {
  1669.         u: '||imageteam.org/img',
  1670.         q: 'img[alt="image"]',
  1671.       },
  1672.       {
  1673.         u: [
  1674.           '||imagetwist.com/',
  1675.           '||imageshimage.com/',
  1676.         ],
  1677.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1678.         q: 'img.pic',
  1679.         xhr: true,
  1680.       },
  1681.       {
  1682.         u: '||imageupper.com/i/',
  1683.         q: '#img',
  1684.         xhr: true,
  1685.       },
  1686.       {
  1687.         u: '||imagevenue.com/',
  1688.         q: 'a[data-toggle="full"] img',
  1689.       },
  1690.       {
  1691.         u: '||imagezilla.net/show/',
  1692.         q: '#photo',
  1693.         xhr: true,
  1694.       },
  1695.       {
  1696.         u: [
  1697.           '||images-na.ssl-images-amazon.com/images/',
  1698.           '||media-imdb.com/images/',
  1699.         ],
  1700.         r: /images\/.+?\.jpg/,
  1701.         s: '/V1\\.?_.+?\\.//g',
  1702.       },
  1703.       {
  1704.         u: '||imgbox.com/',
  1705.         r: /\.com\/([a-z0-9]+)$/i,
  1706.         q: '#img',
  1707.         xhr: hostname !== 'imgbox.com',
  1708.       },
  1709.       {
  1710.         u: '||imgclick.net/',
  1711.         r: /\.net\/(\w+)/,
  1712.         q: 'img.pic',
  1713.         xhr: true,
  1714.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1715.       },
  1716.       {
  1717.         u: '.imgcredit.xyz/',
  1718.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1719.         s: ['https$1$2', 'https$1.png'],
  1720.       },
  1721.       {
  1722.         u: [
  1723.           '||imgflip.com/i/',
  1724.           '||imgflip.com/gif/',
  1725.         ],
  1726.         r: /\/(i|gif)\/([^/?#]+)/,
  1727.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1728.       },
  1729.       {
  1730.         u: [
  1731.           '||imgur.com/a/',
  1732.           '||imgur.com/gallery/',
  1733.         ],
  1734.         g: async (text, doc, url, m, rule, node, cb) => {
  1735.           let u = `https://imgur.com/ajaxalbums/getimages/${url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1736.           const info = tryCatch(JSON.parse, (await Remoting.gmXhr(u)).responseText);
  1737.           const images = ((info || 0).data || 0).images;
  1738.           const items = [];
  1739.           for (const img of images || []) {
  1740.             u = `https://i.imgur.com/${img.hash}`;
  1741.             items.push({
  1742.               url: img.ext === '.gif' && img.animated !== false ?
  1743.                 [`${u}.webm`, `${u}.mp4`, u] :
  1744.                 u + img.ext,
  1745.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1746.             });
  1747.           }
  1748.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1749.             items.title = info.title;
  1750.           cb(items);
  1751.         },
  1752.         css: '.post > .hover { display:none!important; }',
  1753.       },
  1754.       {
  1755.         u: '||imgur.com/',
  1756.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1757.         s: 'gallery',
  1758.         g: (text, doc, url, m) =>
  1759.           m[2].split(',').map(id => ({
  1760.             url: `https://i.${m[1]}${id}.jpg`,
  1761.           })),
  1762.       },
  1763.       {
  1764.         u: '||imgur.com/',
  1765.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  1766.         s: (m, node) => {
  1767.           if (/memegen|random|register|search|signin/.test(m.input))
  1768.             return '';
  1769.           const a = node.closest('a');
  1770.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1771.             return false;
  1772.           // postfixes: huge, large, medium, thumbnail, big square, small square
  1773.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  1774.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1775.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1776.           return ext === 'webm' ?
  1777.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1778.             u + ext;
  1779.         },
  1780.       },
  1781.       {
  1782.         u: [
  1783.           '||instagr.am/p/',
  1784.           '||instagram.com/p/',
  1785.         ],
  1786.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') + '/?__a=1',
  1787.         q: text => {
  1788.           const m = JSON.parse(text).graphql.shortcode_media;
  1789.           return m.video_url || m.display_url;
  1790.         },
  1791.         rect: 'div.PhotoGridMediaItem',
  1792.         c: text => {
  1793.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1794.           return m === undefined ? '(no caption)' : m.node.text;
  1795.         },
  1796.       },
  1797.       {
  1798.         u: [
  1799.           '||livememe.com/',
  1800.           '||lvme.me/',
  1801.         ],
  1802.         r: /\.\w+\/([^.]+)$/,
  1803.         s: 'http://i.lvme.me/$1.jpg',
  1804.       },
  1805.       {
  1806.         u: '||lostpic.net/image',
  1807.         q: '.image-viewer-image img',
  1808.       },
  1809.       {
  1810.         u: '||makeameme.org/meme/',
  1811.         r: /\/meme\/([^/?#]+)/,
  1812.         s: 'https://media.makeameme.org/created/$1.jpg',
  1813.       },
  1814.       {
  1815.         u: '||photobucket.com/',
  1816.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1817.         s: 'https://i$1$3',
  1818.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1819.       },
  1820.       {
  1821.         u: '||piccy.info/view3/',
  1822.         r: /(.+?\/view3)\/(.*)\//,
  1823.         s: '$1/$2/orig/',
  1824.         q: '#mainim',
  1825.       },
  1826.       {
  1827.         u: '||pimpandhost.com/image/',
  1828.         r: /(.+?\/image\/[0-9]+)/,
  1829.         s: '$1?size=original',
  1830.         q: 'img.original',
  1831.       },
  1832.       {
  1833.         u: [
  1834.           '||pixroute.com/',
  1835.           '||imgspice.com/',
  1836.         ],
  1837.         r: /\.html$/,
  1838.         q: 'img[id]',
  1839.         xhr: true,
  1840.       },
  1841.       {
  1842.         u: '||postima',
  1843.         r: /postima?ge?\.org\/image\/\w+/,
  1844.         q: [
  1845.           'a[href*="dl="]',
  1846.           '#main-image',
  1847.         ],
  1848.       },
  1849.       {
  1850.         u: [
  1851.           '||prntscr.com/',
  1852.           '||prnt.sc/',
  1853.         ],
  1854.         r: /\.\w+\/.+/,
  1855.         q: 'meta[property="og:image"]',
  1856.         xhr: true,
  1857.       },
  1858.       {
  1859.         u: '||radikal.ru/',
  1860.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  1861.         s: (m, node, rule) =>
  1862.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  1863.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  1864.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  1865.       },
  1866.       {
  1867.         u: '||tumblr.com',
  1868.         r: /_500\.jpg/,
  1869.         s: ['/_500/_1280/', ''],
  1870.       },
  1871.       {
  1872.         u: '||twimg.com/',
  1873.         r: /\/profile_images/i,
  1874.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1875.       },
  1876.       {
  1877.         u: '||twimg.com/media/',
  1878.         r: /.+?format=(jpe?g|png|gif)/i,
  1879.         s: '$0&name=orig',
  1880.       },
  1881.       {
  1882.         u: '||twimg.com/1/proxy',
  1883.         r: /t=([^&_]+)/i,
  1884.         s: m => atob(m[1]).match(/http.+/),
  1885.       },
  1886.       {
  1887.         u: '||pic.twitter.com/',
  1888.         r: /\.com\/[a-z0-9]+/i,
  1889.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1890.         follow: true,
  1891.       },
  1892.       {
  1893.         u: '||twitpic.com/',
  1894.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1895.         s: 'https://twitpic.com/show/large/$2',
  1896.       },
  1897.       {
  1898.         u: '||wiki',
  1899.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1900.         s: '/\\/thumb(?=\\/)|' +
  1901.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1902.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1903.         xhr: !hostname.includes('wiki'),
  1904.       },
  1905.       {
  1906.         u: '||ytimg.com/vi/',
  1907.         r: /(.+?\/vi\/[^/]+)/,
  1908.         s: '$1/0.jpg',
  1909.         rect: '.video-list-item',
  1910.       },
  1911.       {
  1912.         u: '/viewer.php?file=',
  1913.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1914.         s: '$1/images/$2',
  1915.         xhr: true,
  1916.       },
  1917.       {
  1918.         u: '/thumb_',
  1919.         r: /\/albums.+\/thumb_[^/]/,
  1920.         s: '/thumb_//',
  1921.       },
  1922.       {
  1923.         u: [
  1924.           '.th.jp',
  1925.           '.th.gif',
  1926.           '.th.png',
  1927.         ],
  1928.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1929.         s: '$1$2',
  1930.         follow: true,
  1931.       },
  1932.       {
  1933.         r: RX_MEDIA_URL,
  1934.       },
  1935.     ];
  1936.  
  1937.     /** @type mpiv.HostRule[] */
  1938.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1939.   },
  1940.  
  1941.   format(rule, {expand} = {}) {
  1942.     const s = Util.stringify(rule, null, ' ');
  1943.     return expand ?
  1944.       /* {"a": ...,
  1945.           "b": ...,
  1946.           "c": ...
  1947.          } */
  1948.       s.replace(/^{\s+/g, '{') :
  1949.       /* {"a": ..., "b": ..., "c": ...} */
  1950.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1951.   },
  1952.  
  1953.   fromElement(el) {
  1954.     const text = el.textContent.trim();
  1955.     if (text.startsWith('{') &&
  1956.         text.endsWith('}') &&
  1957.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  1958.       const rule = tryCatch(JSON.parse, text);
  1959.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  1960.     }
  1961.   },
  1962.  
  1963.   /** @returns mpiv.HostRule | Error | false | undefined */
  1964.   parse(rule) {
  1965.     const isBatchOp = this instanceof Map;
  1966.     try {
  1967.       if (typeof rule === 'string')
  1968.         rule = JSON.parse(rule);
  1969.       if ('d' in rule && typeof rule.d !== 'string')
  1970.         rule.d = undefined;
  1971.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1972.         return false;
  1973.       const compileTo = isBatchOp ? rule : {};
  1974.       if (rule.r)
  1975.         compileTo.r = new RegExp(rule.r, 'i');
  1976.       if (RX_HAS_CODE.test(rule.s))
  1977.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1978.       if (RX_HAS_CODE.test(rule.q))
  1979.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1980.       if (RX_HAS_CODE.test(rule.c))
  1981.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1982.       return rule;
  1983.     } catch (e) {
  1984.       if (!e.message.includes('unsafe-eval'))
  1985.         if (isBatchOp) {
  1986.           this.set(rule, e);
  1987.         } else {
  1988.           return e;
  1989.         }
  1990.     }
  1991.   },
  1992.  
  1993.   runC(text, doc = document) {
  1994.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  1995.     ai.caption = fn(text, doc);
  1996.   },
  1997.  
  1998.   runCHandler: {
  1999.     function: (text, doc) =>
  2000.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2001.     string: (text, doc) => {
  2002.       const el = $many(ai.rule.c, doc);
  2003.       return !el ? '' :
  2004.         el.getAttribute('content') ||
  2005.         el.getAttribute('title') ||
  2006.         el.textContent;
  2007.     },
  2008.     default: () =>
  2009.       (ai.tooltip || 0).text ||
  2010.       ai.node.alt ||
  2011.       $propUp(ai.node, 'title') ||
  2012.       Remoting.getFileName(
  2013.         ai.node.tagName === (ai.popup || 0).tagName
  2014.           ? ai.url
  2015.           : ai.node.src || $propUp(ai.node, 'href')),
  2016.   },
  2017.  
  2018.   runQ(text, doc, docUrl) {
  2019.     let url;
  2020.     if (typeof ai.rule.q === 'function') {
  2021.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2022.       if (Array.isArray(url)) {
  2023.         ai.urls = url.slice(1);
  2024.         url = url[0];
  2025.       }
  2026.     } else {
  2027.       const el = $many(ai.rule.q, doc);
  2028.       url = Remoting.findImageUrl(el, docUrl);
  2029.     }
  2030.     return url;
  2031.   },
  2032.  
  2033.   /** @returns {?Array} if falsy then the rule should be skipped */
  2034.   runS(node, rule, m) {
  2035.     let urls = [];
  2036.     for (const s of ensureArray(rule.s))
  2037.       urls.push(
  2038.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2039.           typeof s === 'function' ? s(m, node, rule) :
  2040.             s);
  2041.     if (rule.q && urls.length > 1) {
  2042.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2043.       return;
  2044.     }
  2045.     if (Array.isArray(urls[0]))
  2046.       urls = urls[0];
  2047.     // `false` returned by "s" property means "skip this rule", "" means "stop all rules"
  2048.     return urls[0] !== false && Array.from(new Set(urls), Util.decodeUrl);
  2049.   },
  2050.  
  2051.   substituteSingle(s, m) {
  2052.     if (!m) return s;
  2053.     if (s.startsWith('/') && !s.startsWith('//')) {
  2054.       const mid = s.search(/[^\\]\//) + 1;
  2055.       const end = s.lastIndexOf('/');
  2056.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2057.       return m.input.replace(re, s.slice(mid + 1, end));
  2058.     }
  2059.     if (m.length && s.includes('$')) {
  2060.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2061.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2062.         for (let i = maxLength; i >= 0; i--) {
  2063.           const part = num.slice(0, i) | 0;
  2064.           if (part < m.length)
  2065.             return (m[part] || '') + num.slice(i);
  2066.         }
  2067.         return text;
  2068.       });
  2069.     }
  2070.     return s;
  2071.   },
  2072.  
  2073.   toggle(rule, prop, condition) {
  2074.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2075.     return condition;
  2076.   },
  2077. };
  2078.  
  2079. const RuleMatcher = {
  2080.  
  2081.   /** @returns ?mpiv.RuleMatchInfo */
  2082.   findForLink(a) {
  2083.     let url =
  2084.       a.getAttribute('data-expanded-url') ||
  2085.       a.getAttribute('data-full-url') ||
  2086.       a.getAttribute('data-url') ||
  2087.       a.href;
  2088.     if (url.startsWith('data:'))
  2089.       url = false;
  2090.     else if (url.includes('//t.co/'))
  2091.       url = 'http://' + a.textContent;
  2092.     return RuleMatcher.find(url, a);
  2093.   },
  2094.  
  2095.   /** @returns ?mpiv.RuleMatchInfo */
  2096.   find(url, node, {noHtml, skipRules} = {}) {
  2097.     const tn = node.tagName;
  2098.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  2099.     const isPicOrLink = isPic || tn === 'A';
  2100.     let m, html;
  2101.     for (const rule of Ruler.rules) {
  2102.       const u = rule[SYM_U] || rule.u && (rule[SYM_U] = UrlMatcher(rule.u));
  2103.       if (u && (!url || !u.fn.call(u.data, url)) ||
  2104.           rule.e && !node.matches(rule.e) ||
  2105.           skipRules && skipRules.includes(rule))
  2106.         continue;
  2107.       if (rule.r)
  2108.         m = !noHtml && rule.html && (isPicOrLink || rule.e)
  2109.           ? rule.r.exec(html || (html = node.outerHTML))
  2110.           : url && rule.r.exec(url);
  2111.       else if (url)
  2112.         m = Object.assign([url], {index: 0, input: url});
  2113.       else
  2114.         m = [];
  2115.       if (!m)
  2116.         continue;
  2117.       if (rule.s === '')
  2118.         return {};
  2119.       let hasS = rule.s != null;
  2120.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2121.       // but we'll only allow it to match rules without 's' in the nested find call
  2122.       if (isPic && !hasS && !skipRules)
  2123.         continue;
  2124.       hasS &= rule.s !== 'gallery';
  2125.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2126.       if (urls)
  2127.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2128.     }
  2129.   },
  2130.  
  2131.   /** @returns ?mpiv.RuleMatchInfo */
  2132.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2133.     let info;
  2134.     let url = `${urls[0]}`;
  2135.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2136.     if (!url)
  2137.       info = {};
  2138.     if (follow)
  2139.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2140.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2141.       const xhr = cfg.xhr && rule.xhr;
  2142.       if (url.startsWith('//'))
  2143.         url = location.protocol + url;
  2144.       info = {
  2145.         match,
  2146.         node,
  2147.         rule,
  2148.         url,
  2149.         urls: urls.length > 1 ? urls.slice(1) : null,
  2150.         gallery: rule.g && Gallery.makeParser(rule.g),
  2151.         post: typeof rule.post === 'function' ? rule.post(match) : rule.post,
  2152.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2153.       };
  2154.     }
  2155.     return info;
  2156.   },
  2157.  
  2158.   isFollowableUrl(url, rule) {
  2159.     const f = rule.follow;
  2160.     return typeof f === 'function' ? f(url) : f;
  2161.   },
  2162. };
  2163.  
  2164. const Remoting = {
  2165.  
  2166.   gmXhr(url, opts = {}) {
  2167.     if (ai.req)
  2168.       tryCatch.call(ai.req, ai.req.abort);
  2169.     return new Promise((resolve, reject) => {
  2170.       const {anonymous} = ai.rule || {};
  2171.       ai.req = GM.xmlHttpRequest({
  2172.         url,
  2173.         anonymous,
  2174.         withCredentials: !anonymous,
  2175.         method: 'GET',
  2176.         timeout: 30e3,
  2177.         ...opts,
  2178.         onload: done,
  2179.         onerror: done,
  2180.         ontimeout() {
  2181.           ai.req = null;
  2182.           reject(`Timeout fetching ${url}`);
  2183.         },
  2184.       });
  2185.       function done(r) {
  2186.         ai.req = null;
  2187.         if (r.status < 400 && !r.error)
  2188.           resolve(r);
  2189.         else
  2190.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2191.       }
  2192.     });
  2193.   },
  2194.  
  2195.   async getDoc(url) {
  2196.     const r = await (!ai.post ?
  2197.       Remoting.gmXhr(url) :
  2198.       Remoting.gmXhr(url, {
  2199.         method: 'POST',
  2200.         data: ai.post,
  2201.         headers: {
  2202.           'Content-Type': 'application/x-www-form-urlencoded',
  2203.           'Referer': url,
  2204.         },
  2205.       }));
  2206.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2207.     return r;
  2208.   },
  2209.  
  2210.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2211.     ai.bufBar = false;
  2212.     ai.bufStart = now();
  2213.     const response = await Remoting.gmXhr(url, {
  2214.       responseType: 'blob',
  2215.       headers: {
  2216.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2217.         Referer: pageUrl || (typeof xhr === 'function' ? xhr() : url),
  2218.       },
  2219.       onprogress: Remoting.getImageProgress,
  2220.     });
  2221.     Bar.set(false);
  2222.     const type = Remoting.guessMimeType(response);
  2223.     let b = response.response;
  2224.     if (!b) throw 'Empty response';
  2225.     if (b.type !== type)
  2226.       b = b.slice(0, b.size, type);
  2227.     const res = xhr === 'blob'
  2228.       ? (ai.blobUrl = URL.createObjectURL(b))
  2229.       : await Remoting.blobToDataUrl(b);
  2230.     return [res, type.startsWith('video')];
  2231.   },
  2232.  
  2233.   getImageProgress(e) {
  2234.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2235.       ai.bufBar = true;
  2236.     if (ai.bufBar) {
  2237.       const pct = e.loaded / e.total * 100 | 0;
  2238.       const size = e.total / 1024 | 0;
  2239.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2240.     }
  2241.   },
  2242.  
  2243.   async findRedirect() {
  2244.     try {
  2245.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2246.         method: 'HEAD',
  2247.         headers: {
  2248.           'Referer': location.href.split('#', 1)[0],
  2249.         },
  2250.       });
  2251.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2252.       if (!info || !info.url)
  2253.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2254.       Object.assign(ai, info);
  2255.       App.startSingle();
  2256.     } catch (e) {
  2257.       App.handleError(e);
  2258.     }
  2259.   },
  2260.  
  2261.   async saveFile() {
  2262.     const url = ai.popup.src || ai.popup.currentSrc;
  2263.     let name = Remoting.getFileName(ai.imageUrl || url);
  2264.     if (!name.includes('.'))
  2265.       name += '.jpg';
  2266.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2267.       $create('a', {href: url, download: name})
  2268.         .dispatchEvent(new MouseEvent('click'));
  2269.     } else {
  2270.       Status.set('+loading');
  2271.       const onload = () => Status.set('-loading');
  2272.       const gmDL = typeof GM_download === 'function';
  2273.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2274.         url,
  2275.         name,
  2276.         headers: {Referer: url},
  2277.         method: 'get', // polyfilling GM_download
  2278.         responseType: 'blob', // polyfilling GM_download
  2279.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2280.         onerror: e => {
  2281.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2282.           onload();
  2283.         },
  2284.         onprogress: Remoting.getImageProgress,
  2285.         onload({response}) {
  2286.           onload();
  2287.           if (!gmDL) { // polyfilling GM_download
  2288.             const a = Object.assign(document.createElement('a'), {
  2289.               href: URL.createObjectURL(response),
  2290.               download: name,
  2291.             });
  2292.             a.dispatchEvent(new MouseEvent('click'));
  2293.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2294.           }
  2295.         },
  2296.       });
  2297.     }
  2298.   },
  2299.  
  2300.   getFileName(url) {
  2301.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2302.   },
  2303.  
  2304.   blobToDataUrl(blob) {
  2305.     return new Promise((resolve, reject) => {
  2306.       const fr = new FileReader();
  2307.       fr.onload = () => resolve(fr.result);
  2308.       fr.onerror = reject;
  2309.       fr.readAsDataURL(blob);
  2310.     });
  2311.   },
  2312.  
  2313.   guessMimeType({responseHeaders, finalUrl}) {
  2314.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2315.         !RegExp.$1.includes('text/plain'))
  2316.       return RegExp.$1;
  2317.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2318.     switch (ext.toLowerCase()) {
  2319.       case 'bmp': return 'image/bmp';
  2320.       case 'gif': return 'image/gif';
  2321.       case 'jpe': return 'image/jpeg';
  2322.       case 'jpeg': return 'image/jpeg';
  2323.       case 'jpg': return 'image/jpeg';
  2324.       case 'mp4': return 'video/mp4';
  2325.       case 'png': return 'image/png';
  2326.       case 'svg': return 'image/svg+xml';
  2327.       case 'tif': return 'image/tiff';
  2328.       case 'tiff': return 'image/tiff';
  2329.       case 'webm': return 'video/webm';
  2330.       default: return 'application/octet-stream';
  2331.     }
  2332.   },
  2333.  
  2334.   findImageUrl(n, url) {
  2335.     if (!n) return;
  2336.     let html;
  2337.     const path =
  2338.       n.getAttribute('src') ||
  2339.       n.getAttribute('data-m4v') ||
  2340.       n.getAttribute('href') ||
  2341.       n.getAttribute('content') ||
  2342.       (html = n.outerHTML).includes('http') &&
  2343.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2344.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2345.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2346.   },
  2347. };
  2348.  
  2349. const Status = {
  2350.  
  2351.   set(status) {
  2352.     if (!status && !cfg.globalStatus) {
  2353.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  2354.       return;
  2355.     }
  2356.     const prefix = cfg.globalStatus ? PREFIX : '';
  2357.     const action = status && /^[+-]/.test(status) && status[0];
  2358.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2359.     const el = cfg.globalStatus ? doc.documentElement :
  2360.       name === 'edge' ? ai.popup :
  2361.         ai.node;
  2362.     if (!el) return;
  2363.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2364.     const oldValue = (el.getAttribute(attr) || '').trim();
  2365.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2366.     switch (action) {
  2367.       case '-':
  2368.         cls.delete(name);
  2369.         break;
  2370.       case false:
  2371.         for (const c of cls)
  2372.           if (c.startsWith(prefix) && c !== name)
  2373.             cls.delete(c);
  2374.       // fallthrough to +
  2375.       case '+':
  2376.         if (name)
  2377.           cls.add(name);
  2378.         break;
  2379.     }
  2380.     const newValue = [...cls].join(' ');
  2381.     if (newValue !== oldValue)
  2382.       el.setAttribute(attr, newValue);
  2383.   },
  2384.  
  2385.   loading(force) {
  2386.     if (!force) {
  2387.       clearTimeout(ai.timerStatus);
  2388.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2389.     } else if (!ai.popupLoaded) {
  2390.       Status.set('+loading');
  2391.     }
  2392.   },
  2393. };
  2394.  
  2395. const UrlMatcher = (() => {
  2396.   // string-to-regexp escaped chars
  2397.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2398.   // rx for '^' symbol in simple url match
  2399.   const RX_SEP = /[^\w%._-]/y;
  2400.   const RXS_SEP = RX_SEP.source;
  2401.   return match => {
  2402.     const results = [];
  2403.     for (const s of ensureArray(match)) {
  2404.       const pinDomain = s.startsWith('||');
  2405.       const pinStart = !pinDomain && s.startsWith('|');
  2406.       const endSep = s.endsWith('^');
  2407.       let fn;
  2408.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2409.       if (needle.includes('^')) {
  2410.         let plain = '';
  2411.         for (const part of needle.split('^'))
  2412.           if (part.length > plain.length)
  2413.             plain = part;
  2414.         const rx = new RegExp(
  2415.           (pinStart ? '^' : '') +
  2416.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2417.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2418.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2419.         needle = [plain, rx];
  2420.         fn = regexp;
  2421.       } else if (pinStart) {
  2422.         fn = endSep ? equals : starts;
  2423.       } else if (pinDomain) {
  2424.         const slashPos = needle.indexOf('/');
  2425.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2426.         needle = [needle, domain, slashPos > 0, endSep];
  2427.         fn = startsDomainPrescreen;
  2428.       } else if (endSep) {
  2429.         fn = ends;
  2430.       } else {
  2431.         fn = has;
  2432.       }
  2433.       results.push({fn, data: needle});
  2434.     }
  2435.     return results.length > 1 ?
  2436.       {fn: checkArray, data: results} :
  2437.       results[0];
  2438.   };
  2439.   function checkArray(s) {
  2440.     return this.some(checkArrayItem, s);
  2441.   }
  2442.   function checkArrayItem(item) {
  2443.     return item.fn.call(item.data, this);
  2444.   }
  2445.   function ends(s) {
  2446.     return s.endsWith(this) || (
  2447.       s.length > this.length &&
  2448.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2449.       endsWithSep(s));
  2450.   }
  2451.   function endsWithSep(s, pos = s.length - 1) {
  2452.     RX_SEP.lastIndex = pos;
  2453.     return RX_SEP.test(s);
  2454.   }
  2455.   function equals(s) {
  2456.     return s.startsWith(this) && (
  2457.       s.length === this.length ||
  2458.       s.length === this.length + 1 && endsWithSep(s));
  2459.   }
  2460.   function has(s) {
  2461.     return s.includes(this);
  2462.   }
  2463.   function regexp(s) {
  2464.     return s.includes(this[0]) && this[1].test(s);
  2465.   }
  2466.   function starts(s) {
  2467.     return s.startsWith(this);
  2468.   }
  2469.   function startsDomainPrescreen(url) {
  2470.     return url.includes(this[0]) && startsDomain.call(this, url);
  2471.   }
  2472.   function startsDomain(url) {
  2473.     let hostStart = url.indexOf('//');
  2474.     if (hostStart && url[hostStart - 1] !== ':')
  2475.       return;
  2476.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2477.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2478.     const [needle, domain, pinDomainEnd, endSep] = this;
  2479.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2480.     for (; ; start++) {
  2481.       start = host.indexOf(domain, start);
  2482.       if (start < 0)
  2483.         return;
  2484.       if (!start || host[start - 1] === '.')
  2485.         break;
  2486.     }
  2487.     start += hostStart;
  2488.     if (url.lastIndexOf(needle, start) !== start)
  2489.       return;
  2490.     const end = start + needle.length;
  2491.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2492.   }
  2493. })();
  2494.  
  2495. const Util = {
  2496.  
  2497.   addStyle(name, css) {
  2498.     const id = `${PREFIX}style:${name}`;
  2499.     const el = doc.getElementById(id) ||
  2500.                css && $create('style', {id});
  2501.     if (!el) return;
  2502.     if (el.textContent !== css)
  2503.       el.textContent = css;
  2504.     if (el.parentElement !== doc.head)
  2505.       doc.head.appendChild(el);
  2506.     return el;
  2507.   },
  2508.  
  2509.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2510.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2511.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2512.   },
  2513.  
  2514.   decodeHtmlEntities(s) {
  2515.     return s
  2516.       .replace(/&quot;/g, '"')
  2517.       .replace(/&apos;/g, '\'')
  2518.       .replace(/&lt;/g, '<')
  2519.       .replace(/&gt;/g, '>')
  2520.       .replace(/&amp;/g, '&');
  2521.   },
  2522.  
  2523.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2524.   decodeUrl(url) {
  2525.     if (!url) return url;
  2526.     const iPct = url.indexOf('%');
  2527.     const iColon = url.indexOf(':');
  2528.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2529.       decodeURIComponent(url) :
  2530.       url;
  2531.   },
  2532.  
  2533.   deepEqual(a, b) {
  2534.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2535.       return a === b;
  2536.     if (Array.isArray(a)) {
  2537.       return Array.isArray(b) &&
  2538.         a.length === b.length &&
  2539.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2540.     }
  2541.     const keys = Object.keys(a);
  2542.     return keys.length === Object.keys(b).length &&
  2543.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2544.   },
  2545.  
  2546.   forceLayout(node) {
  2547.     // eslint-disable-next-line no-unused-expressions
  2548.     node.clientHeight;
  2549.   },
  2550.  
  2551.   formatError(e, rule) {
  2552.     const message =
  2553.       e.message ||
  2554.       e.readyState && 'Request failed.' ||
  2555.       e.type === 'error' && `File can't be displayed.${
  2556.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2557.       }` ||
  2558.       e;
  2559.     const m = [
  2560.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2561.       ['', 'font-weight:normal;color:unset'],
  2562.     ];
  2563.     m.push(...[
  2564.       ['Node: %o', ai.node],
  2565.       ['Rule: %o', rule],
  2566.       ai.url && ['URL: %s', ai.url],
  2567.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2568.     ].filter(Boolean));
  2569.     return {
  2570.       message,
  2571.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2572.       consoleArgs: m.map(([, v]) => v),
  2573.     };
  2574.   },
  2575.  
  2576.   isHovered(el) {
  2577.     // doesn't work in image tabs, browser bug?
  2578.     return App.isImageTab || el.closest(':hover');
  2579.   },
  2580.  
  2581.   isVideoUrl(url) {
  2582.     return url.startsWith('data:video') ||
  2583.            !url.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(url);
  2584.   },
  2585.  
  2586.   newFunction(...args) {
  2587.     try {
  2588.       return App.NOP || new Function(...args);
  2589.     } catch (e) {
  2590.       if (!e.message.includes('unsafe-eval'))
  2591.         throw e;
  2592.       App.NOP = () => {};
  2593.       return App.NOP;
  2594.     }
  2595.   },
  2596.  
  2597.   rel2abs(rel, abs = location.href) {
  2598.     try {
  2599.       return rel.startsWith('data:') ? rel :
  2600.         rel.startsWith('blob:') ? '' : // blobs don't work because they're usually revoked
  2601.           new URL(rel, abs).href;
  2602.     } catch (e) {
  2603.       return rel;
  2604.     }
  2605.   },
  2606.  
  2607.   stringify(...args) {
  2608.     const p = Array.prototype;
  2609.     const {toJSON} = p;
  2610.     if (toJSON) p.toJSON = null;
  2611.     const res = JSON.stringify(...args);
  2612.     if (toJSON) p.toJSON = toJSON;
  2613.     return res;
  2614.   },
  2615.  
  2616.   suppressTooltip() {
  2617.     for (const node of [
  2618.       ai.node.parentNode,
  2619.       ai.node,
  2620.       ai.node.firstElementChild,
  2621.     ]) {
  2622.       const t = (node || 0).title;
  2623.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2624.         ai.tooltip = {node, text: t};
  2625.         node.title = '';
  2626.         break;
  2627.       }
  2628.     }
  2629.   },
  2630.  
  2631.   tabFixUrl() {
  2632.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2633.            navigator.userAgent.includes('Gecko/') &&
  2634.            flattenHtml(`data:text/html;charset=utf8,
  2635.       <style>
  2636.         body {
  2637.           margin: 0;
  2638.           padding: 0;
  2639.           background: #222;
  2640.         }
  2641.         .fit {
  2642.           overflow: hidden
  2643.         }
  2644.         .fit > img {
  2645.           max-width: 100vw;
  2646.           max-height: 100vh;
  2647.         }
  2648.         body > img {
  2649.           margin: auto;
  2650.           position: absolute;
  2651.           left: 0;
  2652.           right: 0;
  2653.           top: 0;
  2654.           bottom: 0;
  2655.         }
  2656.       </style>
  2657.       <body class=fit>
  2658.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2659.       </body>
  2660.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2661.   },
  2662. };
  2663.  
  2664. async function setup({rule} = {}) {
  2665.   if (typeof doc.body.attachShadow !== 'function') {
  2666.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2667.           'You can edit the script\'s storage directly in your userscript manager.');
  2668.     return;
  2669.   }
  2670.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2671.   let uiCfg;
  2672.   let root = (elConfig || 0).shadowRoot;
  2673.   let {blankRuleElement} = setup;
  2674.   /** @type NodeList */
  2675.   const UI = new Proxy({}, {
  2676.     get(_, id) {
  2677.       return root.getElementById(id);
  2678.     },
  2679.   });
  2680.   if (!rule || !elConfig)
  2681.     init(await Config.load({save: true}));
  2682.   if (rule)
  2683.     installRule(rule);
  2684.  
  2685.   function init(data) {
  2686.     uiCfg = data;
  2687.     $remove(elConfig);
  2688.     elConfig = $create('div', {contentEditable: true});
  2689.     root = elConfig.attachShadow({mode: 'open'});
  2690.     root.innerHTML = createConfigHtml();
  2691.     initEvents();
  2692.     renderAll();
  2693.     renderCustomScales();
  2694.     renderRules();
  2695.     doc.body.appendChild(elConfig);
  2696.     requestAnimationFrame(() => {
  2697.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2698.     });
  2699.   }
  2700.  
  2701.   function initEvents() {
  2702.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  2703.     UI._export.onclick = e => {
  2704.       dropEvent(e);
  2705.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  2706.       UI._exportNotification.hidden = false;
  2707.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  2708.     };
  2709.     UI._import.onclick = e => {
  2710.       dropEvent(e);
  2711.       const s = prompt('Paste settings:');
  2712.       if (s)
  2713.         init(new Config({data: s}));
  2714.     };
  2715.     UI._install.onclick = setupRuleInstaller;
  2716.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  2717.     UI._reveal.onclick = e => {
  2718.       e.preventDefault();
  2719.       cssApp.hidden = !cssApp.hidden;
  2720.       if (!cssApp.hidden) {
  2721.         if (!cssApp.value) {
  2722.           App.updateStyles();
  2723.           cssApp.value = App.globalStyle.trim();
  2724.           cssApp.setSelectionRange(0, 0);
  2725.         }
  2726.         cssApp.focus();
  2727.       }
  2728.     };
  2729.     UI.start.onchange = function () {
  2730.       UI.delay.closest('label').hidden =
  2731.         UI.preload.closest('label').hidden =
  2732.           this.value !== 'auto';
  2733.     };
  2734.     UI.start.onchange();
  2735.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2736.     // color
  2737.     for (const el of $$('[type="color"]', root)) {
  2738.       el.oninput = colorOnInput;
  2739.       el.elSwatch = el.nextElementSibling;
  2740.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2741.       el.elOpacity.elColor = el;
  2742.     }
  2743.     function colorOnInput() {
  2744.       this.elSwatch.style.setProperty('--color',
  2745.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2746.     }
  2747.     // range
  2748.     for (const el of $$('[type="range"]', root)) {
  2749.       el.oninput = rangeOnInput;
  2750.       el.onblur = rangeOnBlur;
  2751.       el.addEventListener('focusin', rangeOnFocus);
  2752.     }
  2753.     function rangeOnBlur(e) {
  2754.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2755.         this.elEdit.onblur(e);
  2756.     }
  2757.     function rangeOnFocus() {
  2758.       if (this.elEdit) return;
  2759.       const {min, max, step, value} = this;
  2760.       this.elEdit = $create('input', {
  2761.         value, min, max, step,
  2762.         className: 'range-edit',
  2763.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2764.         type: 'number',
  2765.         elRange: this,
  2766.         onblur: rangeEditOnBlur,
  2767.         oninput: rangeEditOnInput,
  2768.       });
  2769.       this.insertAdjacentElement('afterend', this.elEdit);
  2770.     }
  2771.     function rangeOnInput() {
  2772.       this.title = (this.dataset.title || '').replace('$', this.value);
  2773.       if (this.elColor) this.elColor.oninput();
  2774.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  2775.     }
  2776.     // range-edit
  2777.     function rangeEditOnBlur(e) {
  2778.       if (e.relatedTarget !== this.elRange) {
  2779.         this.remove();
  2780.         this.elRange.elEdit = null;
  2781.       }
  2782.     }
  2783.     function rangeEditOnInput() {
  2784.       this.elRange.valueAsNumber = this.valueAsNumber;
  2785.       this.elRange.oninput();
  2786.     }
  2787.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2788.     // which may happen since it sees only the outer <div> in the event |target|
  2789.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  2790.   }
  2791.  
  2792.   function closeSetup(event) {
  2793.     const isApply = this.id === '_apply';
  2794.     if (event && (this.id === '_ok' || isApply)) {
  2795.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  2796.       Ruler.init();
  2797.       if (isApply) {
  2798.         renderCustomScales();
  2799.         UI._css.textContent = cfg._getCss();
  2800.         return;
  2801.       }
  2802.     }
  2803.     $remove(elConfig);
  2804.     elConfig = null;
  2805.   }
  2806.  
  2807.   function collectConfig({save, clone} = {}) {
  2808.     let data = {};
  2809.     for (const el of $$('input[id], select[id]', root))
  2810.       data[el.id] = el.type === 'checkbox' ? el.checked :
  2811.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  2812.           el.value || '';
  2813.     Object.assign(data, {
  2814.       css: UI.css.value.trim(),
  2815.       delay: UI.delay.valueAsNumber * 1000,
  2816.       hosts: collectRules(),
  2817.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  2818.       scales: UI.scales.value
  2819.         .trim()
  2820.         .split(/[,;]*\s+/)
  2821.         .map(x => x.replace(',', '.'))
  2822.         .filter(x => !isNaN(parseFloat(x))),
  2823.     });
  2824.     if (clone)
  2825.       data = JSON.parse(Util.stringify(data));
  2826.     return new Config({data, save});
  2827.   }
  2828.  
  2829.   function collectRules() {
  2830.     return [...UI._rules.children]
  2831.       .map(el => [el.value.trim(), el[RULE]])
  2832.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2833.       .map(([s, json]) => json || s)
  2834.       .filter(Boolean);
  2835.   }
  2836.  
  2837.   function checkRule({target: el}) {
  2838.     let json, error, title;
  2839.     const prev = el.previousElementSibling;
  2840.     if (el.value) {
  2841.       json = Ruler.parse(el.value);
  2842.       error = json instanceof Error && (json.message || String(json));
  2843.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  2844.         !/^[-.a-z0-9]*$/i.test(json.d);
  2845.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  2846.         .filter(Boolean).join('\n');
  2847.       el.classList.toggle('invalid-domain', invalidDomain);
  2848.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  2849.       if (!prev)
  2850.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2851.     } else if (prev) {
  2852.       prev.focus();
  2853.       el.remove();
  2854.     }
  2855.     el[RULE] = !error && json;
  2856.     el.title = title;
  2857.     el.setCustomValidity(error || '');
  2858.   }
  2859.  
  2860.   function focusRule({type, target: el, relatedTarget: from}) {
  2861.     if (el === this)
  2862.       return;
  2863.     if (type === 'paste') {
  2864.       setTimeout(() => focusRule.call(this, {target: el}));
  2865.       return;
  2866.     }
  2867.     if (el[RULE])
  2868.       el.value = Ruler.format(el[RULE], {expand: true});
  2869.     const h = clamp(el.scrollHeight, 15, elConfig.clientHeight / 4);
  2870.     if (h > el.offsetHeight)
  2871.       el.style.minHeight = h + 'px';
  2872.     if (!this.contains(from))
  2873.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2874.     if (from) {
  2875.       from.style.minHeight = '';
  2876.       if (from[RULE])
  2877.         from.value = Ruler.format(from[RULE]);
  2878.     }
  2879.   }
  2880.  
  2881.   function installRule(rule) {
  2882.     const inputs = UI._rules.children;
  2883.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2884.     if (!el) {
  2885.       el = inputs[0];
  2886.       el[RULE] = rule;
  2887.       el.value = Ruler.format(rule);
  2888.       el.hidden = false;
  2889.       const i = Math.max(0, collectRules().indexOf(rule));
  2890.       inputs[i].insertAdjacentElement('afterend', el);
  2891.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2892.     }
  2893.     const rect = el.getBoundingClientRect();
  2894.     if (rect.bottom < 0 ||
  2895.         rect.bottom > el.parentNode.offsetHeight)
  2896.       el.scrollIntoView();
  2897.     el.classList.add('highlight');
  2898.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2899.     el.focus();
  2900.   }
  2901.  
  2902.   function renderRules() {
  2903.     const rules = UI._rules;
  2904.     rules.addEventListener('input', checkRule);
  2905.     rules.addEventListener('focusin', focusRule);
  2906.     rules.addEventListener('paste', focusRule);
  2907.     blankRuleElement =
  2908.       setup.blankRuleElement =
  2909.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2910.     for (const rule of uiCfg.hosts || []) {
  2911.       const el = blankRuleElement.cloneNode();
  2912.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2913.       rules.appendChild(el);
  2914.       checkRule({target: el});
  2915.     }
  2916.     const search = UI._search;
  2917.     search.oninput = () => {
  2918.       setup.search = search.value;
  2919.       const s = search.value.toLowerCase();
  2920.       for (const el of rules.children)
  2921.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2922.     };
  2923.     search.value = setup.search || '';
  2924.     if (search.value)
  2925.       search.oninput();
  2926.   }
  2927.  
  2928.   function renderCustomScales() {
  2929.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  2930.   }
  2931.  
  2932.   function renderAll() {
  2933.     for (const el of $$('input[id], select[id], textarea[id]', root))
  2934.       if (el.id in uiCfg)
  2935.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  2936.     for (const el of $$('input[type="range"]', root))
  2937.       el.oninput();
  2938.     for (const el of $$('a[href^="http"]', root))
  2939.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  2940.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  2941.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  2942.   }
  2943. }
  2944.  
  2945. function setupClickedRule(event) {
  2946.   let rule;
  2947.   const el = event.target.closest('blockquote, code, pre');
  2948.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  2949.     dropEvent(event);
  2950.     setup({rule});
  2951.   }
  2952. }
  2953.  
  2954. async function setupRuleInstaller(e) {
  2955.   dropEvent(e);
  2956.   const parent = this.parentElement;
  2957.   parent.children._installLoading.hidden = false;
  2958.   this.remove();
  2959.   let rules;
  2960.  
  2961.   try {
  2962.     rules = extractRules(await Remoting.getDoc(this.href));
  2963.     const selector = $create('select', {
  2964.       size: 8,
  2965.       style: 'width: 100%',
  2966.       ondblclick: e => e.target !== selector && maybeSetup(e),
  2967.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  2968.     });
  2969.     selector.append(...rules.map(renderRule));
  2970.     selector.selectedIndex = findMatchingRuleIndex();
  2971.     parent.children._installLoading.remove();
  2972.     parent.children._installHint.hidden = false;
  2973.     parent.appendChild(selector);
  2974.     requestAnimationFrame(() => {
  2975.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  2976.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  2977.       selector.focus();
  2978.     });
  2979.   } catch (e) {
  2980.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  2981.   }
  2982.  
  2983.   function extractRules({doc}) {
  2984.     // sort by name
  2985.     return [...$$('#wiki-body tr', doc)]
  2986.       .map(tr => [
  2987.         tr.cells[0].textContent.trim(),
  2988.         Ruler.fromElement(tr.cells[1]),
  2989.       ])
  2990.       .filter(([name, r]) =>
  2991.         name && r && (!r.d || hostname.includes(r.d)))
  2992.       .sort(([a], [b]) =>
  2993.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  2994.           a > b ? 1 :
  2995.             0);
  2996.   }
  2997.  
  2998.   function findMatchingRuleIndex() {
  2999.     const dottedHost = `.${hostname}.`;
  3000.     let maxCount = 0, maxIndex = 0, index = 0;
  3001.     for (const [name, {d}] of rules) {
  3002.       let count = !!(d && hostname.includes(d)) * 10;
  3003.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3004.         count += dottedHost.includes(`.${part}.`) && part.length;
  3005.       if (count > maxCount) {
  3006.         maxCount = count;
  3007.         maxIndex = index;
  3008.       }
  3009.       index++;
  3010.     }
  3011.     return maxIndex;
  3012.   }
  3013.  
  3014.   function renderRule([name, rule]) {
  3015.     return $create('option', {
  3016.       textContent: name,
  3017.       title: Ruler.format(rule, {expand: true})
  3018.         .replace(/^{|\s*}$/g, '')
  3019.         .split('\n')
  3020.         .slice(0, 12)
  3021.         .map(renderTitleLine)
  3022.         .filter(Boolean)
  3023.         .join('\n'),
  3024.     });
  3025.   }
  3026.  
  3027.   function renderTitleLine(line, i, arr) {
  3028.     return (
  3029.       // show ... on 10th line if there are more lines
  3030.       i === 9 && arr.length > 10 ? '...' :
  3031.         i > 10 ? '' :
  3032.           // truncate to 100 chars
  3033.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3034.             // strip the leading space
  3035.             .replace(/^\s/, ''));
  3036.   }
  3037.  
  3038.   function maybeSetup(e) {
  3039.     if (!eventModifiers(e))
  3040.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3041.   }
  3042. }
  3043.  
  3044. function createConfigHtml() {
  3045.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/Rules';
  3046.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3047.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  3048.   return flattenHtml(`
  3049. <style>
  3050.   :host {
  3051.     all: initial !important;
  3052.     position: fixed !important;
  3053.     z-index: 2147483647 !important;
  3054.     top: 20px !important;
  3055.     right: 20px !important;
  3056.     padding: 1.5em !important;
  3057.     color: #000 !important;
  3058.     background: #eee !important;
  3059.     box-shadow: 5px 5px 25px 2px #000 !important;
  3060.     width: 32em !important;
  3061.     border: 1px solid black !important;
  3062.     display: flex !important;
  3063.     flex-direction: column !important;
  3064.   }
  3065.   main {
  3066.     font: 12px/15px sans-serif;
  3067.   }
  3068.   ul {
  3069.     max-height: calc(100vh - 200px);
  3070.     margin: 10px 0 15px 0;
  3071.     padding: 0;
  3072.     list-style: none;
  3073.   }
  3074.   li {
  3075.     margin: 0;
  3076.     padding: .25em 0;
  3077.   }
  3078.   li.options {
  3079.     display: flex;
  3080.     align-items: center;
  3081.     justify-content: space-between;
  3082.   }
  3083.   li.row {
  3084.     flex-wrap: wrap;
  3085.     justify-content: flex-start;
  3086.   }
  3087.   li.row label {
  3088.     flex-direction: row;
  3089.     align-items: center;
  3090.   }
  3091.   li.row input {
  3092.     margin-right: .25em;
  3093.   }
  3094.   li.stretch label {
  3095.     flex: 1;
  3096.     white-space: nowrap;
  3097.   }
  3098.   li.stretch label > span {
  3099.     display: flex;
  3100.     flex-direction: row;
  3101.     flex: 1;
  3102.   }
  3103.   label {
  3104.     display: inline-flex;
  3105.     flex-direction: column;
  3106.   }
  3107.   label:not(:last-child) {
  3108.     margin-right: 1em;
  3109.   }
  3110.   input, select {
  3111.     min-height: 1.6em;
  3112.     box-sizing: border-box;
  3113.   }
  3114.   input[type=checkbox] {
  3115.     margin-left: 0;
  3116.   }
  3117.   input[type=number] {
  3118.     width: 4em;
  3119.   }
  3120.   input:not([type=checkbox])  {
  3121.     padding: 0 .25em;
  3122.   }
  3123.   input[type=range] {
  3124.     flex: 1;
  3125.     width: 100%;
  3126.     margin: 0 .25em;
  3127.     padding: 0;
  3128.     filter: saturate(0);
  3129.     opacity: .5;
  3130.   }
  3131.   u + input[type=range] {
  3132.     max-width: 3em;
  3133.   }
  3134.   input[type=range]:hover {
  3135.     filter: none;
  3136.     opacity: 1;
  3137.   }
  3138.   input[type=color] {
  3139.     position: absolute;
  3140.     width: calc(1.5em + 2px);
  3141.     opacity: 0;
  3142.     cursor: pointer;
  3143.   }
  3144.   u {
  3145.     position: relative;
  3146.     flex: 0 0 1.5em;
  3147.     height: 1.5em;
  3148.     border: 1px solid #888;
  3149.     pointer-events: none;
  3150.     color: #888;
  3151.     background-image:
  3152.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3153.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3154.     background-size: .5em .5em;
  3155.     background-position: 0 0, .25em .25em;
  3156.   }
  3157.   u::after {
  3158.     position: absolute;
  3159.     top: 0;
  3160.     left: 0;
  3161.     right: 0;
  3162.     bottom: 0;
  3163.     content: "";
  3164.     background-color: var(--color);
  3165.   }
  3166.   .range-edit {
  3167.     position: absolute;
  3168.     box-shadow: 0 0.25em 1em #000;
  3169.     z-index: 99;
  3170.   }
  3171.   #_rules input,
  3172.   textarea {
  3173.     flex: 1;
  3174.     resize: vertical;
  3175.     margin: 1px 0;
  3176.     font: 11px/1.25 Consolas, monospace;
  3177.   }
  3178.   :invalid {
  3179.     background-color: #f002;
  3180.     border-color: #800;
  3181.   }
  3182.   code {
  3183.     font-weight: bold;
  3184.   }
  3185.   a {
  3186.     text-decoration: none;
  3187.   }
  3188.   a:hover {
  3189.     text-decoration: underline;
  3190.   }
  3191.   button {
  3192.     padding: .2em 1em;
  3193.     margin: 0 1em;
  3194.   }
  3195.   kbd {
  3196.     padding: 1px 6px;
  3197.     font-weight: bold;
  3198.     font-family: Consolas, monospace;
  3199.     border: 1px solid #888;
  3200.     border-radius: 3px;
  3201.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3202.   }
  3203.   .column {
  3204.     display: flex;
  3205.     flex-direction: column;
  3206.   }
  3207.   .highlight {
  3208.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3209.     animation-fill-mode: both;
  3210.   }
  3211.   #_rules > * {
  3212.     word-break: break-all;
  3213.   }
  3214.   #_rules > :not(:focus) {
  3215.     overflow: hidden; /* prevents wrapping in FF */
  3216.   }
  3217.   .invalid-domain {
  3218.     opacity: .5;
  3219.   }
  3220.   .matching-domain {
  3221.     border-color: #56b8ff;
  3222.     background: #d7eaff;
  3223.   }
  3224.   #_x {
  3225.     position: absolute;
  3226.     top: 0;
  3227.     right: 0;
  3228.     padding: 4px 8px;
  3229.     cursor: pointer;
  3230.     user-select: none;
  3231.   }
  3232.   #_x:hover {
  3233.     background-color: #8884;
  3234.   }
  3235.   #_cssApp {
  3236.     color: seagreen;
  3237.   }
  3238.   #_exportNotification {
  3239.     color: green;
  3240.     font-weight: bold;
  3241.     position: absolute;
  3242.     left: 0;
  3243.     right: 0;
  3244.     bottom: 2px;
  3245.   }
  3246.   #_installHint {
  3247.     color: green;
  3248.   }
  3249.   @keyframes fade-in {
  3250.     from { background-color: deepskyblue }
  3251.     to {}
  3252.   }
  3253.   @media (prefers-color-scheme: dark) {
  3254.     :host {
  3255.       color: #aaa !important;
  3256.       background: #333 !important;
  3257.     }
  3258.     a {
  3259.       color: deepskyblue;
  3260.     }
  3261.     button {
  3262.       background: linear-gradient(-5deg, #333, #555);
  3263.       border: 1px solid #000;
  3264.       box-shadow: 0 2px 6px #181818;
  3265.       border-radius: 3px;
  3266.       cursor: pointer;
  3267.     }
  3268.     button:hover {
  3269.       background: linear-gradient(-5deg, #333, #666);
  3270.     }
  3271.     textarea, input, select {
  3272.       background: #111;
  3273.       color: #BBB;
  3274.       border: 1px solid #555;
  3275.     }
  3276.     input[type=checkbox] {
  3277.       filter: invert(1);
  3278.     }
  3279.     input[type=range] {
  3280.       filter: invert(1) saturate(0);
  3281.     }
  3282.     input[type=range]:hover {
  3283.       filter: invert(1);
  3284.     }
  3285.     kbd {
  3286.       border-color: #666;
  3287.     }
  3288.     @supports (-moz-appearance: none) {
  3289.       input[type=checkbox],
  3290.       input[type=range],
  3291.       input[type=range]:hover {
  3292.         filter: none;
  3293.       }
  3294.     }
  3295.     .range-edit {
  3296.       box-shadow: 0 .5em 1em .5em #000;
  3297.     }
  3298.     .matching-domain {
  3299.       border-color: #0065af;
  3300.       background: #032b58;
  3301.       color: #ddd;
  3302.     }
  3303.     #_cssApp {
  3304.       color: darkseagreen;
  3305.     }
  3306.     #_installHint {
  3307.       color: greenyellow;
  3308.     }
  3309.     ::-webkit-scrollbar {
  3310.       width: 14px;
  3311.       height: 14px;
  3312.       background: #333;
  3313.     }
  3314.     ::-webkit-scrollbar-button:single-button {
  3315.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3316.     }
  3317.     ::-webkit-scrollbar-track-piece {
  3318.       background: #444;
  3319.       border: 4px solid #333;
  3320.       border-radius: 8px;
  3321.     }
  3322.     ::-webkit-scrollbar-thumb {
  3323.       border: 3px solid #333;
  3324.       border-radius: 8px;
  3325.       background: #666;
  3326.     }
  3327.     ::-webkit-resizer {
  3328.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3329.       border: 2px solid transparent;
  3330.     }
  3331.   }
  3332. </style>
  3333. <style id="_css">${cfg._getCss()}</style>
  3334. <main id="${PREFIX}setup">
  3335.   <div id=_x>x</div>
  3336.   <ul class=column>
  3337.     <details style="margin: -2em 0 1em">
  3338.       <summary style="cursor:pointer"><b>Click to view help & hotkeys</b></summary>
  3339.       <table style="text-align:left">
  3340.         <tr><th>Activate</th><td>move mouse cursor over thumbnail</td></tr>
  3341.         <tr><th>Deactivate</th><td>move cursor off thumbnail, or click, or zoom out fully</td></tr>
  3342.         <tr><th>Prevent/freeze</th><td>hold down <kbd>Shift</kbd> while entering/leaving thumbnail</td></tr>
  3343.         <tr><th>Force-activate<br>(for small pics)</th>
  3344.           <td>hold <kbd>Ctrl</kbd> while entering image element</td></tr>
  3345.         <tr><td>&nbsp;</td></tr>
  3346.         <tr><th>Start zooming</th>
  3347.           <td>configurable: automatic or via right-click / <kbd>Shift</kbd> while popup is visible</td></tr>
  3348.         <tr><th>Zoom</th><td>mouse wheel</td></tr>
  3349.         <tr><th>Rotate</th><td><kbd>L</kbd> <kbd>r</kbd> keys (left or right)</td></tr>
  3350.         <tr><th>Flip/mirror</th><td><kbd>h</kbd> <kbd>v</kbd> keys (horizontally or vertically)</td></tr>
  3351.         <tr><th>Previous/next<br>in album</th>
  3352.           <td>mouse wheel, <kbd>j</kbd> <kbd>k</kbd> or <kbd>←</kbd> <kbd>→</kbd> keys</td></tr>
  3353.         <tr><td>&nbsp;</td></tr>
  3354.         <tr><th>Download</th><td><kbd>d</kbd> key while popup is visible</td></tr>
  3355.         <tr><th>Mute/unmute</th><td><kbd>m</kbd> key while popup is visible</td></tr>
  3356.         <tr><th>Open in tab</th><td><kbd>t</kbd> key while popup is visible</td></tr>
  3357.       </table>
  3358.     </details>
  3359.     <li class=options>
  3360.       <label>Popup shows on
  3361.         <select id=start>
  3362.           <option value=auto>automatically
  3363.           <option value=context>Right click / Ctrl
  3364.           <option value=ctrl>Ctrl
  3365.         </select>
  3366.       </label>
  3367.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3368.       <label title="(if the full version of the hovered image is ...% larger)">
  3369.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3370.       </label>
  3371.       <label>Zoom activates on
  3372.         <select id=zoom>
  3373.           <option value=context>Right click / Shift
  3374.           <option value=wheel>Wheel up / Shift
  3375.           <option value=shift>Shift
  3376.           <option value=auto>automatically
  3377.         </select>
  3378.       </label>
  3379.       <label>...and zooms to
  3380.         <select id=fit>
  3381.           <option value=all>fit to window
  3382.           <option value=large>fit if larger
  3383.           <option value=no>100%
  3384.           <option value="" title="Use custom scale factors">custom
  3385.         </select>
  3386.       </label>
  3387.     </li>
  3388.     <li class=options>
  3389.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3390.       </label>
  3391.       <label>When fully zoomed out:
  3392.         <select id=zoomOut>
  3393.           <option value=stay>stay in zoom mode
  3394.           <option value=auto>stay if still hovered
  3395.           <option value=unzoom>undo zoom mode
  3396.           <option value=close>close popup
  3397.         </select>
  3398.       </label>
  3399.       <label style="flex: 1" title="${trimLeft(`
  3400.         Scale factors to use when “zooms to” selector is set to “custom”.
  3401.         0 = fit to window,
  3402.         0! = same as 0 but also removes smaller values,
  3403.         * after a value marks the default zoom factor, for example: 1*
  3404.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3405.         ${scalesHint}
  3406.       `)}">Custom scale factors:
  3407.         <input id=scales placeholder="${scalesHint}">
  3408.       </label>
  3409.     </li>
  3410.     <li class="options row">
  3411.       <label title="...or try to keep the original link/thumbnail unobscured by the popup">
  3412.         <input type=checkbox id=center>Centered*</label>
  3413.       <label title="Provides smoother experience but increases network traffic">
  3414.         <input type=checkbox id=preload>Preload on hover*</label>
  3415.       <label title="...or show a partial image while still loading">
  3416.         <input type=checkbox id=waitLoad>Show when fully loaded*</label>
  3417.       <label><input type=checkbox id=uiFadein>Fade-in transition</label>
  3418.       <label><input type=checkbox id=mute>Mute videos</label>
  3419.       <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3420.       <label title="Causes slowdowns so don't enable unless you explicitly use it in your custom CSS">
  3421.         <input type=checkbox id=globalStatus>Expose status on &lt;html&gt;*</label>
  3422.       <label title="Disable only if you spoof the HTTP headers yourself">
  3423.         <input type=checkbox id=xhr>Spoof hotlinking*</label>
  3424.     </li>
  3425.     <li class="options stretch">
  3426.       <label>Background
  3427.         <span>
  3428.           <input id=uiBackgroundColor type=color><u></u>
  3429.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3430.         </span>
  3431.       </label>
  3432.       <label>Border color, opacity, size
  3433.         <span>
  3434.           <input id=uiBorderColor type=color><u></u>
  3435.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3436.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3437.         </span>
  3438.       </label>
  3439.       <label>Shadow color, opacity, size
  3440.         <span>
  3441.           <input id=uiShadowColor type=color><u></u>
  3442.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3443.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3444.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3445.         </span>
  3446.       </label>
  3447.       <label>Padding
  3448.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3449.       </label>
  3450.       <label>Margin
  3451.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3452.       </label>
  3453.     </li>
  3454.     <li>
  3455.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>&nbsp;
  3456.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3457.       <a href="#" id=_reveal style="float: right"
  3458.          title="You can copy parts of it to override them in your custom CSS">
  3459.          View the built-in CSS</a>
  3460.       <div class=column>
  3461.         <textarea id=css spellcheck=false></textarea>
  3462.         <textarea id=_cssApp spellcheck=false hidden readonly rows=30></textarea>
  3463.       </div>
  3464.     </li>
  3465.     <li style="display: flex; justify-content: space-between;">
  3466.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  3467.       <div style="white-space: nowrap">
  3468.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3469.         in "d" value, for example <code>"d": "!foo.com"</code>
  3470.       </div>
  3471.       <div>
  3472.         <input id=_search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3473.       </div>
  3474.     </li>
  3475.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3476.       <div id=_rules class=column>
  3477.         <textarea rows=1 spellcheck=false></textarea>
  3478.       </div>
  3479.     </li>
  3480.     <li>
  3481.       <div hidden id=_installLoading>Loading...</div>
  3482.       <div hidden id=_installHint>Double-click the rule (or select and press Enter) to add it
  3483.         . Click <code>Apply</code> or <code>OK</code> to confirm.</div>
  3484.       <a href="${MPIV_BASE_URL}" id=_install>Install rule from repository...</a>
  3485.     </li>
  3486.   </ul>
  3487.   <div style="text-align:center">
  3488.     <button id=_ok accesskey=s>OK</button>
  3489.     <button id=_apply accesskey=a>Apply</button>
  3490.     <button id=_import style="margin-right: 0">Import</button>
  3491.     <button id=_export style="margin-left: 0">Export</button>
  3492.     <button id=_cancel>Cancel</button>
  3493.     <div id=_exportNotification hidden>Copied to clipboard.</div>
  3494.   </div>
  3495. </main>`);
  3496. }
  3497.  
  3498. function createGlobalStyle() {
  3499.   App.globalStyle = /*language=CSS*/ (String.raw`
  3500. #\mpiv-bar {
  3501.   position: fixed;
  3502.   z-index: 2147483647;
  3503.   top: 0;
  3504.   left: 0;
  3505.   right: 0;
  3506.   opacity: 0;
  3507.   transition: opacity 1s ease .25s;
  3508.   text-align: center;
  3509.   font-family: sans-serif;
  3510.   font-size: 15px;
  3511.   font-weight: bold;
  3512.   background: #0005;
  3513.   color: white;
  3514.   padding: 4px 10px;
  3515.   text-shadow: .5px .5px 2px #000;
  3516. }
  3517. #\mpiv-bar.\mpiv-show,
  3518. #\mpiv-bar[data-force] {
  3519.   opacity: 1;
  3520. }
  3521. #\mpiv-bar[data-zoom]::after {
  3522.   content: " (" attr(data-zoom) ")";
  3523.   opacity: .8;
  3524. }
  3525. #\mpiv-popup.\mpiv-show {
  3526.   display: inline;
  3527. }
  3528. #\mpiv-popup {
  3529.   display: none;
  3530.   cursor: none;
  3531. ${cfg.uiFadein ? String.raw`
  3532.   animation: .2s \mpiv-fadein both;
  3533.   transition: box-shadow .25s, background-color .25s;
  3534.   ` : ''}
  3535. ${App.popupStyleBase = `
  3536.   border: none;
  3537.   box-sizing: border-box;
  3538.   position: fixed;
  3539.   z-index: 2147483647;
  3540.   padding: 0;
  3541.   margin: 0;
  3542.   top: 0;
  3543.   left: 0;
  3544.   width: auto;
  3545.   height: auto;
  3546.   transform-origin: center;
  3547.   max-width: none;
  3548.   max-height: none;
  3549. `}
  3550. }
  3551. #\mpiv-popup.\mpiv-show {
  3552.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3553.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3554.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3555.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3556. }
  3557. #\mpiv-popup.\mpiv-show[loaded] {
  3558.   background-color: ${Util.color('Background')};
  3559.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3560. }
  3561. #\mpiv-popup.\mpiv-zoom-max {
  3562.   image-rendering: pixelated;
  3563. }
  3564. #\mpiv-setup {
  3565. }
  3566. @keyframes \mpiv-fadein {
  3567.   from {
  3568.     opacity: 0;
  3569.     border-color: transparent;
  3570.   }
  3571.   to {
  3572.     opacity: 1;
  3573.   }
  3574. }
  3575. ` + (cfg.globalStatus ? String.raw`
  3576. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  3577.   cursor: progress !important;
  3578. }
  3579. :root.\mpiv-edge #\mpiv-popup {
  3580.   cursor: default;
  3581. }
  3582. :root.\mpiv-error *:hover {
  3583.   cursor: not-allowed !important;
  3584. }
  3585. :root.\mpiv-ready *:hover,
  3586. :root.\mpiv-large *:hover {
  3587.   cursor: zoom-in !important;
  3588. }
  3589. :root.\mpiv-shift *:hover {
  3590.   cursor: default !important;
  3591. }
  3592. ` : String.raw`
  3593. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  3594.   cursor: progress;
  3595. }
  3596. [\mpiv-status~="edge"]:hover {
  3597.   cursor: default;
  3598. }
  3599. [\mpiv-status~="error"]:hover {
  3600.   cursor: not-allowed;
  3601. }
  3602. [\mpiv-status~="ready"]:hover,
  3603. [\mpiv-status~="large"]:hover {
  3604.   cursor: zoom-in;
  3605. }
  3606. [\mpiv-status~="shift"]:hover {
  3607.   cursor: default;
  3608. }
  3609. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3610.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3611.   return App.globalStyle;
  3612. }
  3613.  
  3614. //#region Global utilities
  3615.  
  3616. const clamp = (v, min, max) =>
  3617.   v < min ? min : v > max ? max : v;
  3618.  
  3619. const compareNumbers = (a, b) =>
  3620.   a - b;
  3621.  
  3622. const flattenHtml = str =>
  3623.   str.trim().replace(/\n\s*/g, '');
  3624.  
  3625. const dropEvent = e =>
  3626.   (e.preventDefault(), e.stopPropagation());
  3627.  
  3628. const ensureArray = v =>
  3629.   Array.isArray(v) ? v : [v];
  3630.  
  3631. /** @param {KeyboardEvent} e */
  3632. const eventModifiers = e =>
  3633.   (e.altKey ? '!' : '') +
  3634.   (e.ctrlKey ? '^' : '') +
  3635.   (e.metaKey ? '#' : '') +
  3636.   (e.shiftKey ? '+' : '');
  3637.  
  3638. const now = performance.now.bind(performance);
  3639.  
  3640. const sumProps = (...props) => {
  3641.   let sum = 0;
  3642.   for (const p of props)
  3643.     sum += parseFloat(p) || 0;
  3644.   return sum;
  3645. };
  3646.  
  3647. const tryCatch = function (fn, ...args) {
  3648.   try {
  3649.     return fn.apply(this, args);
  3650.   } catch (e) {}
  3651. };
  3652.  
  3653. const $ = (sel, node = doc) =>
  3654.   node.querySelector(sel) || false;
  3655.  
  3656. const $$ = (sel, node = doc) =>
  3657.   node.querySelectorAll(sel);
  3658.  
  3659. const $create = (tag, props) =>
  3660.   Object.assign(doc.createElement(tag), props);
  3661.  
  3662. const $css = (el, props) =>
  3663.   Object.entries(props).forEach(([k, v]) =>
  3664.     el.style.setProperty(k, v, 'important'));
  3665.  
  3666. const $many = (q, doc) => {
  3667.   for (const selector of ensureArray(q)) {
  3668.     const el = selector && $(selector, doc);
  3669.     if (el)
  3670.       return el;
  3671.   }
  3672. };
  3673.  
  3674. const $prop = (sel, prop, node = doc) =>
  3675.   (node = $(sel, node)) && node[prop] || '';
  3676.  
  3677. const $propUp = (node, prop) =>
  3678.   (node = node.closest(`[${prop}]`)) &&
  3679.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3680.   '';
  3681.  
  3682. const $remove = node =>
  3683.   node && node.remove();
  3684.  
  3685. //#endregion
  3686. //#region Init
  3687.  
  3688. Config.load({save: true}).then(res => {
  3689.   cfg = res;
  3690.   if (window === top)
  3691.     GM.registerMenuCommand('MPIV: configure', setup);
  3692.  
  3693.   if (doc.body) App.checkImageTab();
  3694.   else doc.addEventListener('DOMContentLoaded', App.checkImageTab, {once: true});
  3695.  
  3696.   doc.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  3697.   if (['gf.qytechs.cn', 'github.com'].includes(hostname))
  3698.     doc.addEventListener('click', setupClickedRule);
  3699.   window.addEventListener('message', App.onMessage);
  3700. });
  3701.  
  3702. //#endregion

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