☰

Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

  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. // @run-at      document-start
  8. //
  9. // @grant       GM_addElement
  10. // @grant       GM_download
  11. // @grant       GM_getValue
  12. // @grant       GM_getValues
  13. // @grant       GM_openInTab
  14. // @grant       GM_registerMenuCommand
  15. // @grant       GM_unregisterMenuCommand
  16. // @grant       GM_setClipboard
  17. // @grant       GM_setValue
  18. // @grant       GM_xmlhttpRequest
  19. //
  20. // @grant       GM.getValue
  21. // @grant       GM.openInTab
  22. // @grant       GM.registerMenuCommand
  23. // @grant       GM.unregisterMenuCommand
  24. // @grant       GM.setClipboard
  25. // @grant       GM.setValue
  26. // @grant       GM.xmlHttpRequest
  27. //
  28. // @version     1.4.6
  29. // @author      tophf
  30. //
  31. // @original-version 2017.9.29
  32. // @original-author  kuehlschrank
  33. //
  34. // @connect     *
  35. // CSP check:
  36. // @connect     self
  37. // rule installer in config dialog:
  38. // @connect     github.com
  39. // big/trusted hostings for the built-in rules with "q":
  40. // @connect     deviantart.com
  41. // @connect     facebook.com
  42. // @connect     fbcdn.com
  43. // @connect     flickr.com
  44. // @connect     gfycat.com
  45. // @connect     googleusercontent.com
  46. // @connect     gyazo.com
  47. // @connect     imgur.com
  48. // @connect     instagr.am
  49. // @connect     instagram.com
  50. // @connect     prnt.sc
  51. // @connect     prntscr.com
  52. // @connect     user-images.githubusercontent.com
  53. //
  54. // @supportURL  https://github.com/tophf/mpiv/issues
  55. // @icon        https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
  56. // ==/UserScript==
  57.  
  58. 'use strict';
  59.  
  60. //#region Globals
  61.  
  62. /** @type mpiv.Config */
  63. let cfg;
  64. /** @type mpiv.AppInfo */
  65. let ai = {rule: {}};
  66. /** @type Element */
  67. let elSetup;
  68. let nonce;
  69.  
  70. const doc = document;
  71. const hostname = location.hostname;
  72. const dotDomain = '.' + hostname;
  73. const isFF = CSS.supports('-moz-appearance', 'none');
  74. const AudioContext = window.AudioContext || function () {};
  75. const {from: arrayFrom, isArray} = Array;
  76.  
  77. const PREFIX = 'mpiv-';
  78. const NOAA_ATTR = 'data-no-aa';
  79. const STATUS_ATTR = `${PREFIX}status`;
  80. const MSG = Object.assign({}, ...[
  81.   'getViewSize',
  82.   'viewSize',
  83. ].map(k => ({[k]: `${PREFIX}${k}`})));
  84. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  85. // time for volatile things to settle down meanwhile we postpone action
  86. // examples: loading image from cache, quickly moving mouse over one element to another
  87. const SETTLE_TIME = 50;
  88. // used to detect JS code in host rules
  89. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  90. const RX_EVAL_BLOCKED = /'Trusted(Script| Type)'|unsafe-eval/;
  91. const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
  92. const BLANK_PIXEL = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
  93. const ZOOM_MAX = 16;
  94. const SYM_U = Symbol('u');
  95. const FN_ARGS = {
  96.   s: ['m', 'node', 'rule'],
  97.   c: ['text', 'doc', 'node', 'rule'],
  98.   q: ['text', 'doc', 'node', 'rule'],
  99.   g: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
  100. };
  101. let trustedHTML, trustedScript;
  102. //#endregion
  103. //#region GM4 polyfill
  104.  
  105. if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
  106.   this.GM = {__proto__: null, info: GM_info};
  107. if (!GM.getValue)
  108.   GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
  109. if (!GM.setValue)
  110.   GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
  111. if (!GM.openInTab)
  112.   GM.openInTab = GM_openInTab;
  113. if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
  114.   GM.registerMenuCommand = GM_registerMenuCommand;
  115. if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
  116.   GM.unregisterMenuCommand = GM_unregisterMenuCommand;
  117. if (!GM.setClipboard)
  118.   GM.setClipboard = GM_setClipboard;
  119. if (!GM.xmlHttpRequest)
  120.   GM.xmlHttpRequest = GM_xmlhttpRequest;
  121.  
  122. //#endregion
  123.  
  124. const App = {
  125.  
  126.   isEnabled: true,
  127.   isImageTab: false,
  128.   globalStyle: '',
  129.   popupStyleBase: '',
  130.   tabfix: /\.(dumpoir|greatfon|picuki)\.com$/.test(dotDomain),
  131.   NOP: /\.(facebook|instagram|chrome|google)\.com$/.test(dotDomain) &&
  132.     (() => {}),
  133.  
  134.   activate(info, event) {
  135.     const {match, node, rule, url} = info;
  136.     const auto = cfg.start === 'auto';
  137.     const vidCtrl = cfg.videoCtrl && isVideo(node);
  138.     if (elSetup) console.info({node, rule, url, match});
  139.     if (auto && vidCtrl && !Events.ctrl)
  140.       return;
  141.     if (ai.node) App.deactivate();
  142.     ai = info;
  143.     ai.force = Events.ctrl;
  144.     ai.gNum = 0;
  145.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  146.     Util.suppressTooltip();
  147.     Calc.updateViewSize();
  148.     Events.ctrl = false;
  149.     Events.toggle(true);
  150.     Events.trackMouse(event);
  151.     if (ai.force && (auto || cfg.start === 'ctrl' || cfg.start === 'context')) {
  152.       App.start();
  153.     } else if ((auto || cfg.preload) && !vidCtrl && !rule.manual) {
  154.       App.belate(auto);
  155.     } else {
  156.       Status.set('ready');
  157.     }
  158.   },
  159.  
  160.   belate(auto) {
  161.     if (cfg.preload) {
  162.       ai.preloadStart = auto ? now() : -1;
  163.       App.start();
  164.       Status.set('+preloading');
  165.     } else {
  166.       ai.timer = setTimeout(App.start, cfg.delay);
  167.     }
  168.   },
  169.  
  170.   checkProgress({start} = {}) {
  171.     const p = ai.popup;
  172.     if (!p)
  173.       return;
  174.     const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  175.     const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  176.     if (h)
  177.       return App.canCommit(w, h);
  178.     if (start) {
  179.       clearInterval(ai.timerProgress);
  180.       ai.timerProgress = setInterval(App.checkProgress, 150);
  181.     }
  182.   },
  183.  
  184.   canClose: (p = ai.popup) => !p || (
  185.     isVideo(p)
  186.       ? !cfg.keepVids
  187.       : document.fullscreenElement !== p
  188.   ),
  189.  
  190.   canCommit(w, h) {
  191.     if (!ai.force && ai.rect && !ai.gItems &&
  192.         Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
  193.       App.deactivate();
  194.       return false;
  195.     }
  196.     App.stopTimers();
  197.     let wait = ai.preloadStart;
  198.     if (wait < 0 && !ai.force || !ai.popup)
  199.       return;
  200.     if (wait > 0 && (wait += cfg.delay - now()) > 0) {
  201.       ai.timer = setTimeout(App.checkProgress, wait);
  202.     } else if ((!w || !h) && (ai.urls || []).length) {
  203.       App.handleError({type: 'error'});
  204.     } else {
  205.       App.commit();
  206.     }
  207.     return true;
  208.   },
  209.  
  210.   async commit() {
  211.     const p = ai.popupShown = ai.popup;
  212.     const isDecoded = cfg.waitLoad && isFunction(p.decode);
  213.     if (isDecoded) {
  214.       await p.decode();
  215.       if (p !== ai.popup)
  216.         return;
  217.     }
  218.     Status.set('-preloading');
  219.     App.updateStyles();
  220.     Calc.measurePopup();
  221.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  222.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  223.     if (willMove)
  224.       Popup.move();
  225.     Bar.updateName();
  226.     Bar.updateDetails();
  227.     Status.set(!ai.popupLoaded && 'loading');
  228.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  229.                ai.nheight > p.clientHeight + ai.extras.h;
  230.     if (ai.large) {
  231.       Status.set('+large');
  232.       // prevent a blank bg+border in FF
  233.       if (isFF && p.complete && !isDecoded)
  234.         p.style.backgroundImage = `url('${p.src}')`;
  235.     }
  236.     if (ai.preloadStart < 0 && isFunction(p.play))
  237.       p.play().catch(now);
  238.   },
  239.  
  240.   deactivate({wait} = {}) {
  241.     App.stopTimers(true);
  242.     if (ai.req)
  243.       tryCatch(ai.req.abort);
  244.     if (ai.tooltip)
  245.       ai.tooltip.node.title = ai.tooltip.text;
  246.     Status.set(false);
  247.     Bar.set(false);
  248.     Events.toggle(false);
  249.     Popup.destroy();
  250.     if (wait) {
  251.       App.isEnabled = false;
  252.       setTimeout(App.enable, 200);
  253.     }
  254.     ai = {rule: {}};
  255.   },
  256.  
  257.   enable() {
  258.     App.isEnabled = true;
  259.   },
  260.  
  261.   handleError(e, rule = ai.rule) {
  262.     if (rule && rule.onerror === 'skip')
  263.       return;
  264.     if (ai.imageUrl &&
  265.         !ai.xhr &&
  266.         !ai.imageUrl.startsWith(location.origin + '/') &&
  267.         location.protocol === 'https:' &&
  268.         CspSniffer.init) {
  269.       Popup.create(ai.imageUrl, ai.pageUrl, e);
  270.       return;
  271.     }
  272.     const fe = Util.formatError(e, rule);
  273.     if (!rule || !ai.urls || !ai.urls.length)
  274.       console.warn(...fe);
  275.     if (ai.urls && ai.urls.length) {
  276.       ai.url = ai.urls.shift();
  277.       if (ai.url) {
  278.         App.stopTimers();
  279.         App.startSingle();
  280.       } else {
  281.         App.deactivate();
  282.       }
  283.     } else if (ai.node) {
  284.       Status.set('error');
  285.       Bar.set(fe.message, 'error');
  286.     }
  287.   },
  288.  
  289.   /** @param {MessageEvent} e */
  290.   onMessage(e) {
  291.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  292.       e.stopImmediatePropagation();
  293.       for (const el of doc.getElementsByTagName('iframe')) {
  294.         if (el.contentWindow === e.source) {
  295.           const s = Calc.frameSize(el, window).join(':');
  296.           e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
  297.           return;
  298.         }
  299.       }
  300.     }
  301.   },
  302.  
  303.   /** @param {MessageEvent} e */
  304.   onMessageChild(e) {
  305.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  306.       e.stopImmediatePropagation();
  307.       removeEventListener('message', App.onMessageChild, true);
  308.       const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
  309.       if (w && h) ai.view = {w, h, x, y};
  310.     }
  311.   },
  312.  
  313.   start() {
  314.     App.updateStyles();
  315.     if (ai.gallery)
  316.       App.startGallery();
  317.     else
  318.       App.startSingle();
  319.   },
  320.  
  321.   startSingle() {
  322.     Status.loading();
  323.     if (ai.force && ai.preloadStart < 0) {
  324.       App.commit();
  325.       return;
  326.     }
  327.     ai.imageUrl = null;
  328.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  329.       Req.findRedirect();
  330.     } else if (ai.rule.q && !isArray(ai.urls)) {
  331.       App.startFromQ();
  332.     } else {
  333.       Popup.create(ai.url);
  334.       Ruler.runC();
  335.     }
  336.   },
  337.  
  338.   async startFromQ() {
  339.     try {
  340.       const {responseText, doc, finalUrl} = await Req.getDoc(ai.url);
  341.       const url = Ruler.runQ(responseText, doc, finalUrl);
  342.       if (!url) {
  343.         App.handleError(['The "q" rule did not produce any URL.', '\nRemote doc: %o', doc]);
  344.         return;
  345.       }
  346.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  347.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  348.         if (!info || !info.url)
  349.           throw `Couldn't follow URL: ${url}`;
  350.         Object.assign(ai, info);
  351.         App.startSingle();
  352.       } else {
  353.         Popup.create(url, finalUrl);
  354.         Ruler.runC(responseText, doc);
  355.       }
  356.     } catch (e) {
  357.       App.handleError(e);
  358.     }
  359.   },
  360.  
  361.   async startGallery() {
  362.     Status.loading();
  363.     try {
  364.       const startUrl = ai.url;
  365.       const p = await Req.getDoc(ai.rule.s !== 'gallery' && startUrl);
  366.       const items = await new Promise(cb => {
  367.         const res = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node, cb);
  368.         if (res !== undefined) cb(res);
  369.       });
  370.       // bail out if the gallery's async callback took too long
  371.       if (ai.url !== startUrl) return;
  372.       ai.gNum = items.length;
  373.       ai.gItems = items.length && items;
  374.       if (ai.gItems) {
  375.         const i = items.index;
  376.         ai.gIndex = i >= 0 && items[i] ? +i :
  377.           Gallery.findIndex(typeof i === 'string' ? i : ai.url);
  378.         setTimeout(Gallery.next);
  379.       } else {
  380.         throw 'Empty gallery';
  381.       }
  382.     } catch (e) {
  383.       App.handleError(e);
  384.     }
  385.   },
  386.  
  387.   stopTimers(bar) {
  388.     for (const timer of ['timer', 'timerStatus', bar && 'timerBar'])
  389.       clearTimeout(ai[timer]);
  390.     clearInterval(ai.timerProgress);
  391.   },
  392.  
  393.   toggleZoom({keepScale} = {}) {
  394.     const p = ai.popup;
  395.     if (!p || !ai.scales || ai.scales.length < 2)
  396.       return;
  397.     ai.zoomed = !ai.zoomed;
  398.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  399.     if (ai.zooming)
  400.       p.classList.add(`${PREFIX}zooming`);
  401.     Popup.move();
  402.     Bar.updateDetails();
  403.     Status.set(ai.zoomed ? 'zoom' : false);
  404.     return ai.zoomed;
  405.   },
  406.  
  407.   updateStyles() {
  408.     Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
  409.     Util.addStyle('rule', ai.rule.css || '');
  410.   },
  411. };
  412.  
  413. const Bar = {
  414.  
  415.   set(label, cls, prefix) {
  416.     let b = ai.bar;
  417.     if (typeof label !== 'string') {
  418.       $remove(b);
  419.       ai.bar = null;
  420.       return;
  421.     }
  422.     const force = !b && 0;
  423.     if (!b) b = ai.bar = $new('div', {id: `${PREFIX}bar`, className: `${PREFIX}${cls}`});
  424.     ai.barText = label;
  425.     App.updateStyles();
  426.     Bar.updateDetails();
  427.     Bar.setText(cfg.uiInfoCaption || cls === 'error' || cls === 'xhr' ? label : '');
  428.     $dataset(b, 'prefix', prefix);
  429.     setTimeout(Bar.show, 0, force);
  430.     if (!b.parentNode) {
  431.       doc.body.appendChild(b);
  432.       Util.forceLayout(b);
  433.     }
  434.   },
  435.  
  436.   setText(text) {
  437.     if (/<([a-z][-a-z]*)[^<>]*>[^<>]*<\/\1\s*>/i.test(text)) { // checking for <tag...>...</tag>
  438.       ai.bar.innerHTML = trustedHTML ? trustedHTML(text) : text;
  439.     } else {
  440.       ai.bar.textContent = text;
  441.     }
  442.   },
  443.  
  444.   show(force) {
  445.     const b = ai.bar;
  446.     if (!force && (!cfg.uiInfo || force !== 0 && cfg.uiInfoOnce) || ai.barShown)
  447.       return;
  448.     clearTimeout(ai.timerBar);
  449.     b.classList.add(PREFIX + 'show');
  450.     $dataset(b, 'force', force === 2 ? '' : null);
  451.     ai.timerBar = !force && setTimeout(Bar.hide, cfg.uiInfoHide * 1000);
  452.     ai.barShown = true;
  453.   },
  454.  
  455.   hide(force) {
  456.     const b = ai.bar;
  457.     if (!b || !force && (!cfg.uiInfo || b.dataset.force) || !ai.barShown)
  458.       return;
  459.     $dataset(b, 'force', force === 2 ? '' : null);
  460.     b.classList.remove(PREFIX + 'show');
  461.     ai.barShown = false;
  462.   },
  463.  
  464.   updateName() {
  465.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  466.     if (gi) {
  467.       const item = gi[i];
  468.       const noDesc = !gi.some(_ => _.desc);
  469.       const c = [
  470.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  471.         item.desc,
  472.       ].filter(Boolean).join(' - ');
  473.       Bar.set(c.trim() || ' ', 'gallery', n > 1 ? `${i + 1}/${n}` : null);
  474.     } else if ('caption' in ai) {
  475.       Bar.set(ai.caption, 'caption');
  476.     } else if (ai.tooltip) {
  477.       Bar.set(ai.tooltip.text, 'tooltip');
  478.     } else {
  479.       Bar.set(' ', 'info');
  480.     }
  481.   },
  482.  
  483.   updateDetails() {
  484.     if (!ai.bar) return;
  485.     const r = ai.rotate;
  486.     const zoom = ai.nwidth && `${
  487.       Math.round(ai.scale * 100)
  488.     }%${
  489.       ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
  490.     }${
  491.       r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
  492.     }, ${
  493.       ai.nwidth
  494.     } x ${
  495.       ai.nheight
  496.     } px, ${
  497.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  498.     } MP, ${
  499.       Calc.aspectRatio(ai.nwidth, ai.nheight)
  500.     }`.replace(/\x20/g, '\xA0');
  501.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  502.       $dataset(ai.bar, 'zoom', zoom || null);
  503.       Bar.show();
  504.     }
  505.   },
  506. };
  507.  
  508. const Calc = {
  509.  
  510.   aspectRatio(w, h) {
  511.     for (let rat = w / h, a, b = 0; ;) {
  512.       b++;
  513.       a = Math.round(w * b / h);
  514.       if (a > 10 && b > 10 || a > 100 || b > 100)
  515.         return rat.toFixed(2);
  516.       if (Math.abs(a / b - rat) < .01)
  517.         return `${a}:${b}`;
  518.     }
  519.   },
  520.  
  521.   frameSize(elFrame, wnd) {
  522.     if (!elFrame) return;
  523.     const r = elFrame.getBoundingClientRect();
  524.     const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
  525.     const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
  526.     const x = r.left < 0 ? -r.left : 0;
  527.     const y = r.top < 0 ? -r.top : 0;
  528.     return [w, h, x, y];
  529.   },
  530.  
  531.   generateScales(fit) {
  532.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  533.     const zoomStep = cfg.zoomStep / 100;
  534.     const arr = [scale];
  535.     if (fit !== 1) {
  536.       const diff = goal / scale;
  537.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  538.       const step = steps && Math.pow(diff, 1 / steps);
  539.       for (let i = steps; --i > 0;)
  540.         arr.push((scale *= step));
  541.       arr.push(scale = goal);
  542.     }
  543.     while ((scale *= zoomStep) <= ZOOM_MAX)
  544.       arr.push(scale);
  545.     return arr;
  546.   },
  547.  
  548.   measurePopup() {
  549.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  550.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  551.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  552.     if (p.clientWidth > nw) {
  553.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  554.       nh = ai.nheight = w / nw * nh | 0;
  555.       nw = ai.nwidth = w;
  556.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  557.     } else
  558.       p.style.cssText = '';
  559.     p.classList.add(`${PREFIX}show`);
  560.     const s = getComputedStyle(p);
  561.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  562.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  563.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  564.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  565.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  566.     ai.extras = {
  567.       inw, inh,
  568.       outw, outh,
  569.       o: o2 / 2,
  570.       w: inw + outw,
  571.       h: inh + outh,
  572.     };
  573.     const fit = Math.min(
  574.       (ai.view.w - ai.extras.w) / ai.nwidth,
  575.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  576.     const isCustom = !cfg.fit && cfg.scales.length;
  577.     let cutoff = Math.min(1, fit);
  578.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  579.     if (isCustom) {
  580.       const dst = [];
  581.       for (const scale of cfg.scales) {
  582.         const val = parseFloat(scale) || fit;
  583.         dst.push(val);
  584.         if (isCustom && typeof scale === 'string') {
  585.           if (scale.includes('!')) cutoff = val;
  586.           if (scale.includes('*')) scaleZoom = val;
  587.         }
  588.       }
  589.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  590.     } else {
  591.       ai.scales = Calc.generateScales(fit);
  592.     }
  593.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  594.     ai.scaleFit = fit;
  595.     ai.scaleZoom = scaleZoom;
  596.   },
  597.  
  598.   rect() {
  599.     const {node, rule} = ai;
  600.     let n = rule.rect && node.closest(rule.rect);
  601.     if (n) return n.getBoundingClientRect();
  602.     const nested = (n = node).firstElementChild ? document.elementsFromPoint(ai.cx, ai.cy) : [];
  603.     let maxArea = 0;
  604.     let maxBounds;
  605.     let i = 0;
  606.     do {
  607.       const bounds = n.getBoundingClientRect();
  608.       const area = bounds.width * bounds.height;
  609.       if (area > maxArea) {
  610.         maxArea = area;
  611.         maxBounds = bounds;
  612.       }
  613.     } while ((n = nested[i++]) && node.contains(n));
  614.     return maxBounds;
  615.   },
  616.  
  617.   scaleBiggerThan(scale, i, arr) {
  618.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  619.   },
  620.  
  621.   scaleIndex(dir) {
  622.     const i = ai.scales.indexOf(ai.scale);
  623.     if (i >= 0) return i + dir;
  624.     for (
  625.       let len = ai.scales.length,
  626.         i = dir > 0 ? 0 : len - 1;
  627.       i >= 0 && i < len;
  628.       i += dir
  629.     ) {
  630.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  631.         return i;
  632.     }
  633.     return -1;
  634.   },
  635.  
  636.   scaleForFirstZoom(keepScale) {
  637.     const z = ai.scaleZoom;
  638.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  639.   },
  640.  
  641.   updateViewSize() {
  642.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  643.     ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
  644.     if (window === top) return;
  645.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  646.     if (w && h) {
  647.       ai.view = {w, h, x: 0, y: 0};
  648.     } else {
  649.       addEventListener('message', App.onMessageChild, true);
  650.       parent.postMessage(MSG.getViewSize, '*');
  651.     }
  652.   },
  653. };
  654.  
  655. class Config {
  656.  
  657.   constructor({data: c, save}) {
  658.     if (typeof c === 'string')
  659.       c = tryJSON(c);
  660.     if (typeof c !== 'object' || !c)
  661.       c = {};
  662.     const {DEFAULTS} = Config;
  663.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  664.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  665.         '';
  666.     if (c.version !== DEFAULTS.version) {
  667.       if (typeof c.hosts === 'string')
  668.         c.hosts = c.hosts.split('\n')
  669.           .map(s => tryJSON(s) || s)
  670.           .filter(Boolean);
  671.       if (c.close === true || c.close === false)
  672.         c.zoomOut = c.close ? 'auto' : 'stay';
  673.       for (const key in DEFAULTS)
  674.         if (typeof c[key] !== typeof DEFAULTS[key])
  675.           c[key] = DEFAULTS[key];
  676.       if (c.version === 3 && c.scales[0] === 0)
  677.         c.scales[0] = '0!';
  678.       for (const key in c)
  679.         if (!(key in DEFAULTS))
  680.           delete c[key];
  681.       c.version = DEFAULTS.version;
  682.       if (save)
  683.         GM.setValue('cfg', c);
  684.     }
  685.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  686.       App.globalStyle = '';
  687.     if (!isArray(c.scales))
  688.       c.scales = [];
  689.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  690.     Object.assign(this, DEFAULTS, c);
  691.   }
  692.  
  693.   static async load(opts) {
  694.     opts.data = await GM.getValue('cfg');
  695.     return new Config(opts);
  696.   }
  697.  
  698.   _getCss() {
  699.     const {css} = this;
  700.     return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
  701.   }
  702. }
  703.  
  704. Config.DEFAULTS = /** @type mpiv.Config */ {
  705.   __proto__: null,
  706.   center: false,
  707.   css: '',
  708.   delay: 500,
  709.   fit: '',
  710.   globalStatus: false,
  711.   // prefer ' inside rules because " will be displayed as \"
  712.   // example: "img[src*='icon']"
  713.   hosts: [{
  714.     name: 'No popup for YouTube thumbnails',
  715.     d: 'www.youtube.com',
  716.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  717.     s: '',
  718.   }, {
  719.     name: 'No popup for SVG/PNG icons',
  720.     d: '',
  721.     e: "img[src*='icon']",
  722.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  723.     s: '',
  724.   }],
  725.   imgtab: false,
  726.   keepOnBlur: false,
  727.   keepVids: false,
  728.   mute: false,
  729.   night: false,
  730.   preload: false,
  731.   scale: 1.05,
  732.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  733.   start: 'auto',
  734.   startAlt: 'context',
  735.   startAltShown: false,
  736.   uiBackgroundColor: '#ffffff',
  737.   uiBackgroundOpacity: 100,
  738.   uiBorderColor: '#000000',
  739.   uiBorderOpacity: 100,
  740.   uiBorder: 0,
  741.   uiFadein: true,
  742.   uiFadeinGallery: true, // some computers show white background while loading so fading hides it
  743.   uiInfo: true,
  744.   uiInfoCaption: true,
  745.   uiInfoHide: 3,
  746.   uiInfoOnce: true,
  747.   uiShadowColor: '#000000',
  748.   uiShadowOpacity: 80,
  749.   uiShadow: 20,
  750.   uiShadowOnLoad: true,
  751.   uiPadding: 0,
  752.   uiMargin: 0,
  753.   version: 6,
  754.   videoCtrl: true,
  755.   waitLoad: false,
  756.   xhr: true,
  757.   zoom: 'context',
  758.   zoomOut: 'auto',
  759.   zoomStep: 133,
  760. };
  761.  
  762. const CspSniffer = {
  763.  
  764.   /** @type {?Object<string,string[]>} */
  765.   csp: null,
  766.   selfUrl: location.origin + '/',
  767.  
  768.   // will be null when done
  769.   init() {
  770.     this.busy = new Promise(resolve => {
  771.       const xhr = new XMLHttpRequest();
  772.       xhr.open('get', location);
  773.       xhr.timeout = Math.max(2000, (performance.timing.responseEnd - performance.timeOrigin) * 2);
  774.       xhr.onreadystatechange = () => {
  775.         if (xhr.readyState >= xhr.HEADERS_RECEIVED) {
  776.           this.csp = this._parse([
  777.             xhr.getResponseHeader('content-security-policy'),
  778.             $prop('meta[http-equiv="Content-Security-Policy"]', 'content'),
  779.           ].filter(Boolean).join(','));
  780.           this.init = this.busy = xhr.onreadystatechange = null;
  781.           xhr.abort();
  782.           resolve();
  783.         }
  784.       };
  785.       xhr.send();
  786.     });
  787.   },
  788.  
  789.   async check(url, allowInit) {
  790.     if (allowInit && this.init) this.init();
  791.     if (this.busy) await this.busy;
  792.     const isVideo = Util.isVideoUrl(url);
  793.     let mode;
  794.     if (this.csp) {
  795.       const src = this.csp[isVideo ? 'media' : 'img'];
  796.       if (!src.some(this._srcMatches, url))
  797.         mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
  798.     }
  799.     return [mode || ai.xhr, isVideo];
  800.   },
  801.  
  802.   _parse(csp) {
  803.     if (!csp) return;
  804.     const src = {};
  805.     const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
  806.     for (let m; (m = rx.exec(csp));)
  807.       src[m[1] || m[2]] = m[3].trim().split(/\s+/);
  808.     if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
  809.       nonce = RegExp.$1;
  810.     if ((src.trusted || []).includes("'script'"))
  811.       App.NOP = () => {};
  812.     if (!src.img) src.img = src.default || [];
  813.     if (!src.media) src.media = src.default || [];
  814.     for (const set of [src.img, src.media]) {
  815.       set.forEach((item, i) => {
  816.         if (item !== '*' && item.includes('*')) {
  817.           set[i] = new RegExp(
  818.             (/^\w+:/.test(item) ? '^' : '^\\w+://') +
  819.             item
  820.             .replace(/[.+?^$|()[\]{}]/g, '\\$&')
  821.             .replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
  822.               `${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
  823.             .replace(/[^/]$/, '$&/'));
  824.         }
  825.       });
  826.     }
  827.     return src;
  828.   },
  829.  
  830.   /** @this string */
  831.   _srcMatches(src) {
  832.     return src instanceof RegExp ? src.test(this) :
  833.       src === '*' ||
  834.       src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
  835.       src === "'self'" && this.startsWith(CspSniffer.selfUrl);
  836.   },
  837. };
  838.  
  839. const Events = {
  840.  
  841.   ctrl: false,
  842.   hoverData: null,
  843.   hoverTimer: 0,
  844.   ignoreKeyHeld: false,
  845.  
  846.   onMouseOver(e) {
  847.     let node = e.target;
  848.     Events.ignoreKeyHeld = e.shiftKey;
  849.     if (!App.isEnabled ||
  850.         e.shiftKey ||
  851.         ai.zoomed ||
  852.         node === ai.popup ||
  853.         node === doc.body ||
  854.         node === doc.documentElement ||
  855.         node === elSetup ||
  856.         ai.gallery && ai.rectHovered ||
  857.         !App.canClose())
  858.       return;
  859.     if (node.shadowRoot)
  860.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  861.     // we don't want to process everything in the path of a quickly moving mouse cursor
  862.     Events.hoverData = {e, node, start: now()};
  863.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  864.     node.addEventListener('mouseout', Events.onMouseOutThrottled);
  865.   },
  866.  
  867.   onMouseOverThrottled(force) {
  868.     const {start, e, node, nodeOut} = Events.hoverData || {};
  869.     if (!node || node === nodeOut && (Events.hoverData = null, 1))
  870.       return;
  871.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  872.     const wait = force ? 0 : start + SETTLE_TIME - now();
  873.     const t = Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  874.     if (t)
  875.       return;
  876.     Events.hoverData = null;
  877.     if (!Ruler.rules)
  878.       Ruler.init();
  879.     const info = RuleMatcher.adaptiveFind(node);
  880.     if (info && info.url && info.node !== ai.node)
  881.       App.activate(info, e);
  882.   },
  883.  
  884.   onMouseOut(e) {
  885.     if (!e.relatedTarget && !cfg.keepOnBlur && !e.shiftKey && App.canClose())
  886.       App.deactivate();
  887.   },
  888.  
  889.   onMouseOutThrottled(e) {
  890.     const d = Events.hoverData;
  891.     if (d) d.nodeOut = this;
  892.     this.removeEventListener('mouseout', Events.onMouseOutThrottled);
  893.     Events.hoverTimer = 0;
  894.   },
  895.  
  896.   onMouseOutShadow(e) {
  897.     const root = e.target.shadowRoot;
  898.     if (root) {
  899.       root.removeEventListener('mouseover', Events.onMouseOver);
  900.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  901.     }
  902.   },
  903.  
  904.   onMouseMove(e) {
  905.     Events.trackMouse(e);
  906.     if (e.shiftKey)
  907.       return;
  908.     if (!ai.zoomed && !ai.rectHovered && App.canClose()) {
  909.       App.deactivate();
  910.     } else if (ai.zoomed) {
  911.       Popup.move();
  912.       const {cx, cy, view: {w, h}} = ai;
  913.       const bx = w / 6;
  914.       const by = h / 6;
  915.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  916.       Status.set(`${onEdge ? '+' : '-'}edge`);
  917.     }
  918.   },
  919.  
  920.   onMouseDown({shiftKey, button, target}) {
  921.     if (!button && target === ai.popup && ai.popup.controls && (shiftKey || !App.canClose())) {
  922.       ai.controlled = ai.zoomed = true;
  923.     } else if (button === 2 || shiftKey) {
  924.       // Shift = ignore; RMB will be processed in onContext
  925.     } else {
  926.       App.deactivate({wait: true});
  927.       doc.addEventListener('mouseup', App.enable, {once: true});
  928.     }
  929.   },
  930.  
  931.   onMouseScroll(e) {
  932.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  933.     if (ai.zoomed) {
  934.       Events.zoomInOut(dir);
  935.     } else if (ai.gNum > 1 && ai.popup) {
  936.       Gallery.next(-dir);
  937.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  938.       App.toggleZoom();
  939.     } else if (App.canClose()) {
  940.       App.deactivate();
  941.       return;
  942.     }
  943.     dropEvent(e);
  944.   },
  945.  
  946.   onKeyDown(e) {
  947.     // Synthesized events may be of the wrong type and not have a `key`
  948.     const key = describeKey(e);
  949.     const p = ai.popupShown;
  950.     if (!p && key === '^Control') {
  951.       addEventListener('keyup', Events.onKeyUp, true);
  952.       Events.ctrl = true;
  953.     }
  954.     if (!p && key === '^ContextMenu')
  955.       return Events.onContext.call(this, e);
  956.     if (!p || e.repeat)
  957.       return;
  958.     switch (key) {
  959.       case '+Shift':
  960.         if (ai.shiftKeyTime)
  961.           return;
  962.         ai.shiftKeyTime = now();
  963.         Status.set('+shift');
  964.         if (cfg.uiInfo)
  965.           Bar.show(1);
  966.         if (isVideo(p))
  967.           p.controls = true;
  968.         return;
  969.       case 'KeyA':
  970.         p.toggleAttribute(NOAA_ATTR);
  971.         break;
  972.       case 'ArrowRight':
  973.       case 'KeyJ':
  974.         Gallery.next(1);
  975.         break;
  976.       case 'ArrowLeft':
  977.       case 'KeyK':
  978.         Gallery.next(-1);
  979.         break;
  980.       case 'KeyC':
  981.         if (ai.bar.firstChild) {
  982.           Bar.setText('');
  983.           Bar.hide(0);
  984.         } else {
  985.           Bar.setText(ai.barText);
  986.           Bar.show(2);
  987.         }
  988.         break;
  989.       case 'KeyD':
  990.         Req.saveFile();
  991.         break;
  992.       case 'KeyF':
  993.         if (p !== document.fullscreenElement) p.requestFullscreen();
  994.         else document.exitFullscreen();
  995.         break;
  996.       case 'KeyH': // flip horizontally
  997.       case 'KeyV': // flip vertically
  998.       case 'KeyL': // rotate left
  999.       case 'KeyR': // rotate right
  1000.         if (!p)
  1001.           return;
  1002.         if (key === 'KeyH' || key === 'KeyV') {
  1003.           const side = !!(ai.rotate % 180) ^ (key === 'KeyH') ? 'flipX' : 'flipY';
  1004.           ai[side] = !ai[side];
  1005.         } else {
  1006.           ai.rotate = ((ai.rotate || 0) + 90 * (key === 'KeyL' ? -1 : 1) + 360) % 360;
  1007.         }
  1008.         Bar.updateDetails();
  1009.         Popup.move();
  1010.         break;
  1011.       case 'KeyI':
  1012.         (ai.barShown ? Bar.hide : Bar.show)(2);
  1013.         break;
  1014.       case 'KeyM':
  1015.         if (isVideo(p))
  1016.           p.muted = !p.muted;
  1017.         break;
  1018.       case 'KeyN':
  1019.         ai.night = p.classList.toggle(`${PREFIX}night`);
  1020.         break;
  1021.       case 'KeyT':
  1022.         GM.openInTab(Util.tabFixUrl() || p.src);
  1023.         App.deactivate();
  1024.         break;
  1025.       case 'Minus':
  1026.       case 'NumpadSubtract':
  1027.         if (ai.zoomed) {
  1028.           Events.zoomInOut(-1);
  1029.         } else {
  1030.           App.toggleZoom();
  1031.         }
  1032.         break;
  1033.       case 'Equal':
  1034.       case 'NumpadAdd':
  1035.         if (ai.zoomed) {
  1036.           Events.zoomInOut(1);
  1037.         } else {
  1038.           App.toggleZoom();
  1039.         }
  1040.         break;
  1041.       case 'Escape':
  1042.         App.deactivate({wait: true});
  1043.         break;
  1044.       case '!Alt':
  1045.         return;
  1046.       default:
  1047.         App.deactivate({wait: true});
  1048.         return;
  1049.     }
  1050.     dropEvent(e);
  1051.   },
  1052.  
  1053.   onKeyUp(e) {
  1054.     const p = ai.popupShown || false;
  1055.     if (e.key === 'Control') {
  1056.       if (!p) removeEventListener('keyup', Events.onKeyUp, true);
  1057.       setTimeout(() => (Events.ctrl = false));
  1058.     }
  1059.     if (p && e.key === 'Shift' && ai.shiftKeyTime) {
  1060.       Status.set('-shift');
  1061.       if (cfg.uiInfo)
  1062.         Bar.hide(1);
  1063.       if (p.controls)
  1064.         p.controls = false;
  1065.       // Chrome doesn't expose events for clicks on video controls so we'll guess
  1066.       if (ai.controlled || !isFF && now() - ai.shiftKeyTime > 500)
  1067.         ai.controlled = false;
  1068.       else if (p && (ai.zoomed || ai.rectHovered !== false))
  1069.         App.toggleZoom();
  1070.       else
  1071.         App.deactivate({wait: true});
  1072.       ai.shiftKeyTime = 0;
  1073.     } else if (
  1074.       describeKey(e) === 'Control' && !p && !Events.ignoreKeyHeld &&
  1075.       (cfg.start === 'ctrl' || cfg.start === 'context' || ai.rule.manual)
  1076.     ) {
  1077.       dropEvent(e);
  1078.       if (Events.hoverData) {
  1079.         Events.hoverData.e = e;
  1080.         Events.onMouseOverThrottled(true);
  1081.       }
  1082.       if (ai.node) {
  1083.         ai.force = true;
  1084.         App.start();
  1085.       }
  1086.     }
  1087.   },
  1088.  
  1089.   onContext(e) {
  1090.     if (Events.ignoreKeyHeld)
  1091.       return;
  1092.     const p = ai.popupShown;
  1093.     if (cfg.zoom === 'context' && p && App.toggleZoom()) {
  1094.       dropEvent(e);
  1095.     } else if (!p && (!cfg.videoCtrl || !isVideo(ai.node) || Events.ctrl) && (
  1096.       cfg.start === 'context' ||
  1097.       cfg.start === 'contextMK' ||
  1098.       cfg.start === 'contextM' && (e.button === 2) ||
  1099.       cfg.start === 'contextK' && (e.button !== 2) ||
  1100.       (cfg.start === 'auto' && ai.rule.manual)
  1101.     )) {
  1102.       // right-clicked on an image while the context menu is shown for something else
  1103.       if (!ai.node && !Events.hoverData)
  1104.         Events.onMouseOver(e);
  1105.       Events.onMouseOverThrottled(true);
  1106.       if (ai.node) {
  1107.         ai.force = true;
  1108.         App.start();
  1109.         dropEvent(e);
  1110.       }
  1111.     } else if (p) {
  1112.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  1113.     }
  1114.   },
  1115.  
  1116.   onVisibility(e) {
  1117.     Events.ctrl = false;
  1118.   },
  1119.  
  1120.   pierceShadow(node, x, y) {
  1121.     for (let root; (root = node.shadowRoot);) {
  1122.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  1123.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  1124.       const inner = root.elementFromPoint(x, y);
  1125.       if (!inner || inner === node)
  1126.         break;
  1127.       node = inner;
  1128.     }
  1129.     return node;
  1130.   },
  1131.  
  1132.   toggle(enable) {
  1133.     const onOff = enable ? 'addEventListener' : 'removeEventListener';
  1134.     const passive = {passive: true, capture: true};
  1135.     window[onOff]('mousemove', Events.onMouseMove, passive);
  1136.     window[onOff]('mouseout', Events.onMouseOut, passive);
  1137.     window[onOff]('mousedown', Events.onMouseDown, passive);
  1138.     window[onOff]('keyup', Events.onKeyUp, true);
  1139.     window[onOff](WHEEL_EVENT, Events.onMouseScroll, {passive: false, capture: true});
  1140.     ai.node.removeEventListener('mouseout', Events.onMouseOutThrottled);
  1141.   },
  1142.  
  1143.   trackMouse(e) {
  1144.     const cx = ai.cx = e.clientX;
  1145.     const cy = ai.cy = e.clientY;
  1146.     const r = ai.rect || (ai.rect = Calc.rect());
  1147.     ai.rectHovered =
  1148.       cx > r.left - 2 && cx < r.right + 2 &&
  1149.       cy > r.top - 2 && cy < r.bottom + 2;
  1150.   },
  1151.  
  1152.   zoomInOut(dir) {
  1153.     const i = Calc.scaleIndex(dir);
  1154.     const n = ai.scales.length;
  1155.     if (i >= 0 && i < n)
  1156.       ai.scale = ai.scales[i];
  1157.     const zo = cfg.zoomOut;
  1158.     if (i <= 0 && zo !== 'stay') {
  1159.       if (ai.scaleFit < ai.scale * .99) {
  1160.         ai.scales.unshift(ai.scale = ai.scaleFit);
  1161.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  1162.         App.deactivate({wait: true});
  1163.         return;
  1164.       }
  1165.       ai.zoomed = zo !== 'unzoom';
  1166.     } else {
  1167.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  1168.     }
  1169.     if (ai.zooming)
  1170.       ai.popup.classList.add(`${PREFIX}zooming`);
  1171.     Popup.move();
  1172.     Bar.updateDetails();
  1173.   },
  1174. };
  1175.  
  1176. const Gallery = {
  1177.  
  1178.   makeParser(g) {
  1179.     return isFunction(g) ? g : Gallery.defaultParser;
  1180.   },
  1181.  
  1182.   findIndex(gUrl) {
  1183.     return Math.max(0, ai.gItems.findIndex(({url}) => isArray(url) ? url.includes(gUrl) : url === gUrl));
  1184.   },
  1185.  
  1186.   next(dir) {
  1187.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  1188.     const item = ai.gItem = ai.gItems[ai.gIndex];
  1189.     if (isArray(item.url)) {
  1190.       ai.urls = item.url.slice(1);
  1191.       ai.url = item.url[0];
  1192.     } else {
  1193.       ai.urls = null;
  1194.       ai.url = item.url;
  1195.     }
  1196.     ai.gItemNext = ai.gItems[Gallery.nextIndex(dir || 1)];
  1197.     App.startSingle();
  1198.     Bar.updateName();
  1199.     if (dir) Bar.show(0);
  1200.   },
  1201.  
  1202.   nextIndex(dir) {
  1203.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  1204.   },
  1205.  
  1206.   defaultParser(text, doc, docUrl, m, rule) {
  1207.     const {g} = rule;
  1208.     const gi = g.index;
  1209.     const qEntry = g.entry;
  1210.     const qCaption = ensureArray(g.caption);
  1211.     const qImage = g.image || 'img';
  1212.     const qTitle = g.title;
  1213.     const fix =
  1214.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  1215.       (s => s.trim());
  1216.     const elems = [...$$(qEntry || qImage, doc)];
  1217.     const items = elems.map(processEntry).filter(Boolean);
  1218.     items.title = processTitle();
  1219.     items.index =
  1220.       RX_HAS_CODE.test(gi) ? Util.newFunction('items', 'node', gi)(items, ai.node) :
  1221.         typeof gi === 'string' ? Req.findImageUrl(tryCatch($, gi, doc), docUrl) :
  1222.           gi == null ? Math.max(0, elems.indexOf(ai.node)) :
  1223.             gi;
  1224.     return items;
  1225.  
  1226.     function processEntry(entry) {
  1227.       const item = {};
  1228.       try {
  1229.         const img = qEntry ? $(qImage, entry) : entry;
  1230.         item.url = fix(Req.findImageUrl(img, docUrl), true);
  1231.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  1232.       } catch (e) {}
  1233.       return item.url && item;
  1234.     }
  1235.     function processCaption(sel) {
  1236.       const el = !sel ? this
  1237.         : $(sel, this) ||
  1238.           $orSelf(sel, this.previousElementSibling) ||
  1239.           $orSelf(sel, this.nextElementSibling);
  1240.       return el && fix(Ruler.runCHandler.default(el) || el.textContent);
  1241.     }
  1242.     function processTitle() {
  1243.       const el = $(qTitle, doc);
  1244.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  1245.     }
  1246.     function $orSelf(selector, el) {
  1247.       if (el && !el.matches(qEntry))
  1248.         return el.matches(selector) ? el : $(selector, el);
  1249.     }
  1250.   },
  1251. };
  1252.  
  1253. const Menu = window === top && GM.registerMenuCommand && {
  1254.   curAltName: '',
  1255.   unreg: GM.unregisterMenuCommand,
  1256.   makeAltName: () => Menu.unreg
  1257.     ? `MPIV: auto-start is ${cfg.start === 'auto' ? 'ON' : 'OFF'}`
  1258.     : 'MPIV: toggle auto-start',
  1259.   register() {
  1260.     GM.registerMenuCommand('MPIV: configure', setup);
  1261.     Menu.registerAlt();
  1262.   },
  1263.   registerAlt() {
  1264.     if (cfg.startAltShown) {
  1265.       Menu.curAltName = Menu.makeAltName();
  1266.       GM.registerMenuCommand(Menu.curAltName, Menu.onAltToggled);
  1267.     }
  1268.   },
  1269.   reRegisterAlt() {
  1270.     const old = Menu.curAltName;
  1271.     if (old && Menu.unreg) Menu.unreg(old);
  1272.     if (!old || Menu.unreg) Menu.registerAlt();
  1273.   },
  1274.   onAltToggled() {
  1275.     const wasAuto = cfg.start === 'auto';
  1276.     if (wasAuto) {
  1277.       cfg.start = cfg.startAlt || (cfg.startAlt = 'context');
  1278.     } else {
  1279.       cfg.startAlt = cfg.start;
  1280.       cfg.start = 'auto';
  1281.     }
  1282.     Menu.reRegisterAlt();
  1283.   },
  1284. };
  1285.  
  1286. const Popup = {
  1287.  
  1288.   async create(src, pageUrl, error) {
  1289.     let p = ai.popup, blank;
  1290.     const inGallery = p && !cfg.uiFadeinGallery && ai.gItems && !ai.zooming;
  1291.     if (inGallery && p === document.fullscreenElement) {
  1292.       Popup.destroyBlob();
  1293.     } else if (p) {
  1294.       Popup.destroy();
  1295.       p = null;
  1296.     }
  1297.     ai.imageUrl = src;
  1298.     if (!src)
  1299.       return;
  1300.     const myAi = ai;
  1301.     let [xhr, isVideo] = await CspSniffer.check(src, error);
  1302.     if (ai !== myAi)
  1303.       return;
  1304.     if (!xhr && error) {
  1305.       App.handleError(error);
  1306.       return;
  1307.     }
  1308.     Object.assign(ai, {pageUrl, xhr});
  1309.     if (xhr)
  1310.       [src, isVideo] = await Req.getImage(src, pageUrl, xhr).catch(App.handleError) || [];
  1311.     let vol;
  1312.     if (ai !== myAi || !src || isVideo && (vol = await GM.getValue('volume'), ai !== myAi))
  1313.       return;
  1314.     if (p) {
  1315.       p.src = blank = BLANK_PIXEL;
  1316.       p.classList.remove(PREFIX + 'show');
  1317.       p.removeAttribute('style');
  1318.       ai.popupShown = null;
  1319.       ai.popupLoaded = false;
  1320.     } else p = ai.popup = isVideo ? PopupVideo.create(vol) : $new('img');
  1321.     p.id = `${PREFIX}popup`;
  1322.     p.src = src;
  1323.     p.addEventListener('error', App.handleError);
  1324.     if ((ai.night = (ai.night != null ? ai.night : cfg.night)))
  1325.       p.classList.add(`${PREFIX}night`);
  1326.     if (ai.zooming)
  1327.       p.addEventListener('transitionend', Popup.onZoom);
  1328.     $dataset(p, 'galleryFlip', inGallery ? '' : null);
  1329.     p.toggleAttribute('loaded', !!inGallery);
  1330.     const poo = ai.popover || typeof p.showPopover === 'function' && $('[popover]:popover-open');
  1331.     ai.popover = poo && poo.getBoundingClientRect().width && ($css(poo, {opacity: 0}), poo) || null;
  1332.     if (p.parentElement !== doc.body)
  1333.       doc.body.insertBefore(p, ai.bar && ai.bar.parentElement === doc.body && ai.bar || null);
  1334.     await 0;
  1335.     if (ai.popup !== p || App.checkProgress({start: true}) === false)
  1336.       return;
  1337.     if (!blank && p.complete)
  1338.       Popup.onLoad.call(p);
  1339.     else if (!isVideo)
  1340.       p.addEventListener('load', Popup.onLoad, {once: true});
  1341.   },
  1342.  
  1343.   destroy() {
  1344.     const p = ai.popup;
  1345.     if (!p) return;
  1346.     p.removeEventListener('load', Popup.onLoad);
  1347.     p.removeEventListener('error', App.handleError);
  1348.     if (ai.popover) {
  1349.       ai.popover.style.removeProperty('opacity');
  1350.       ai.popover = null;
  1351.     }
  1352.     if (isFunction(p.pause))
  1353.       p.pause();
  1354.     p.remove();
  1355.     Popup.destroyBlob();
  1356.     ai.zoomed = ai.popup = ai.popupLoaded = null;
  1357.   },
  1358.  
  1359.   destroyBlob() {
  1360.     if (!ai.blobUrl) return;
  1361.     setTimeout(URL.revokeObjectURL, SETTLE_TIME, ai.blobUrl);
  1362.     ai.blobUrl = null;
  1363.   },
  1364.  
  1365.   move() {
  1366.     let x, y;
  1367.     const {cx, cy, extras, view} = ai;
  1368.     const vw = view.w - extras.outw;
  1369.     const vh = view.h - extras.outh;
  1370.     const w0 = ai.scale * ai.nwidth + extras.inw;
  1371.     const h0 = ai.scale * ai.nheight + extras.inh;
  1372.     const isSwapped = ai.rotate % 180;
  1373.     const w = isSwapped ? h0 : w0;
  1374.     const h = isSwapped ? w0 : h0;
  1375.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  1376.       const r = ai.rect;
  1377.       const rx = (r.left + r.right) / 2;
  1378.       const ry = (r.top + r.bottom) / 2;
  1379.       if (vw - r.right - 40 > w || w < r.left - 40) {
  1380.         if (h < vh - 60)
  1381.           y = clamp(ry - h / 2, 30, vh - h - 30);
  1382.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  1383.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  1384.         if (w < vw - 60)
  1385.           x = clamp(rx - w / 2, 30, vw - w - 30);
  1386.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  1387.       }
  1388.     }
  1389.     if (x == null) {
  1390.       x = vw > w
  1391.         ? (vw - w) / 2 + view.x
  1392.         : (vw - w) * clamp(5 / 3 * ((cx - view.x) / vw - .2), 0, 1);
  1393.     }
  1394.     if (y == null) {
  1395.       y = vh > h
  1396.         ? (vh - h) / 2 + view.y
  1397.         : (vh - h) * clamp(5 / 3 * ((cy - view.y) / vh - .2), 0, 1);
  1398.     }
  1399.     const diff = isSwapped ? (w0 - h0) / 2 : 0;
  1400.     x += extras.o - diff;
  1401.     y += extras.o + diff;
  1402.     $css(ai.popup, {
  1403.       transform: `translate(${Math.round(x)}px, ${Math.round(y)}px) ` +
  1404.                  `rotate(${ai.rotate || 0}deg) ` +
  1405.                  `scale(${ai.flipX ? -1 : 1},${ai.flipY ? -1 : 1})`,
  1406.       width: `${Math.round(w0)}px`,
  1407.       height: `${Math.round(h0)}px`,
  1408.     });
  1409.   },
  1410.  
  1411.   onLoad() {
  1412.     if (this === ai.popup) {
  1413.       this.setAttribute('loaded', '');
  1414.       ai.popupLoaded = true;
  1415.       Status.set('-loading');
  1416.       let i = ai.gItem;
  1417.       if (i) i.url = this.src;
  1418.       if ((i = ai.gItemNext))
  1419.         Popup.preload(this, i);
  1420.     }
  1421.   },
  1422.  
  1423.   onZoom() {
  1424.     this.classList.remove(`${PREFIX}zooming`);
  1425.   },
  1426.  
  1427.   async preload(p, item, u = item.url, el = $new('img')) {
  1428.     ai.gItemNext = null;
  1429.     if (!isArray(u)) {
  1430.       el.src = u;
  1431.       return;
  1432.     }
  1433.     for (const arr = u; p === ai.popup && item.url === arr && (u = arr[0]);) {
  1434.       const {type} = await new Promise(cb => {
  1435.         el.src = u;
  1436.         el.onload = el.onerror = cb;
  1437.       });
  1438.       if (arr[0] === u)
  1439.         arr.shift();
  1440.       if (type === 'load') {
  1441.         item.url = u;
  1442.         break;
  1443.       }
  1444.     }
  1445.   },
  1446. };
  1447.  
  1448. const PopupVideo = {
  1449.   create(volume) {
  1450.     ai.bufBar = false;
  1451.     ai.bufStart = now();
  1452.     return $new('video', {
  1453.       autoplay: ai.preloadStart !== -1,
  1454.       controls: true,
  1455.       muted: cfg.mute || new AudioContext().state === 'suspended',
  1456.       loop: true,
  1457.       volume: clamp(+volume || .5, 0, 1),
  1458.       onprogress: PopupVideo.progress,
  1459.       oncanplaythrough: PopupVideo.progressDone,
  1460.       onvolumechange: PopupVideo.rememberVolume,
  1461.     });
  1462.   },
  1463.  
  1464.   progress() {
  1465.     const {duration} = this;
  1466.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1467.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1468.       if (ai.bar && (ai.bufBar |= pct > 0 && pct < 50))
  1469.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1470.     }
  1471.   },
  1472.  
  1473.   progressDone() {
  1474.     this.onprogress = this.oncanplaythrough = null;
  1475.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1476.       Bar.set(false);
  1477.     Popup.onLoad.call(this);
  1478.   },
  1479.  
  1480.   rememberVolume() {
  1481.     GM.setValue('volume', this.volume);
  1482.   },
  1483. };
  1484.  
  1485. const Ruler = {
  1486. /*
  1487.  'u' works only with URLs so it's ignored if 'html' is true
  1488.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1489.    |foo = url or text must start with foo
  1490.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1491.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1492.  'r' is checked only if 'u' matches first
  1493. */
  1494.   init() {
  1495.     const errors = new Map();
  1496.     const src = cfg.hosts || [];
  1497.     const uniq = src.filter((r, i, arr) => !i || !Util.deepEqual(r, arr[i - 1]));
  1498.     if (uniq.length < src.length)
  1499.       GM.setValue('cfg', cfg);
  1500.     /** @type mpiv.HostRule[] */
  1501.     const rules = Ruler.rules = uniq.map(Ruler.parse, errors).filter(Boolean);
  1502.     const hasGMAE = typeof GM_addElement === 'function';
  1503.     const canEval = nonce || (nonce = ($('script[nonce]') || {}).nonce || '') || hasGMAE;
  1504.     const evalId = canEval && `${GM_info.script.name}${Math.random()}`;
  1505.     const evalRules = [];
  1506.     const evalCode = [`window[${JSON.stringify(evalId)}]=[`];
  1507.     for (const [rule, err] of errors.entries()) {
  1508.       if (!RX_EVAL_BLOCKED.test(err)) {
  1509.         App.handleError('Invalid custom host rule:', rule);
  1510.         continue;
  1511.       }
  1512.       if (canEval) {
  1513.         evalCode.push(evalRules.length ? ',' : '',
  1514.           '[', rules.indexOf(rule), ',{',
  1515.           ...Object.keys(FN_ARGS)
  1516.             .map(k => RX_HAS_CODE.test(rule[k]) && `${k}(${FN_ARGS[k]}){${rule[k]}},`)
  1517.             .filter(Boolean),
  1518.           '}]');
  1519.       }
  1520.       evalRules.push(rule);
  1521.     }
  1522.     if (evalRules.length) {
  1523.       let result, wnd;
  1524.       if (canEval) {
  1525.         const GMAE = hasGMAE
  1526.           ? GM_addElement // eslint-disable-line no-undef
  1527.           : (tag, {textContent: txt}) => document.head.appendChild(
  1528.             Object.assign(document.createElement(tag), {
  1529.               textContent: trustedScript ? trustedScript(txt) : txt,
  1530.               nonce,
  1531.             }));
  1532.         evalCode.push(']; document.currentScript.remove();');
  1533.         GMAE('script', {textContent: evalCode.join('')});
  1534.         result = (wnd = unsafeWindow)[evalId] ||
  1535.           isFF && (wnd = wnd.wrappedJSObject)[evalId];
  1536.       }
  1537.       if (result) {
  1538.         for (const [index, fns] of result)
  1539.           Object.assign(rules[index], fns);
  1540.         delete wnd[evalId];
  1541.       } else {
  1542.         console.warn('Site forbids compiling JS code in these custom rules', evalRules);
  1543.       }
  1544.     }
  1545.  
  1546.     // optimization: a rule is created only when on domain
  1547.     switch (dotDomain.match(/[^.]+(?=\.com?(?:\.[^.]+)?$)|[^.]+\.[^.]+$|$/)[0]) {
  1548.  
  1549.       case '4chan.org': rules.push({
  1550.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1551.         q: '.op .fileText a',
  1552.         css: '#post-preview{display:none}',
  1553.       }); break;
  1554.  
  1555.       case 'amazon': rules.push({
  1556.         r: /.+?images\/I\/.+?\./,
  1557.         s: m => {
  1558.           const uh = doc.getElementById('universal-hover');
  1559.           return uh ? '' : m[0] + 'jpg';
  1560.         },
  1561.         css: '#zoomWindow{display:none!important;}',
  1562.       }); break;
  1563.  
  1564.       case 'bing': rules.push({
  1565.         e: 'a[m*="murl"]',
  1566.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1567.         s: '$1',
  1568.         html: true,
  1569.       }); break;
  1570.  
  1571.       case 'deviantart': rules.push({
  1572.         e: 'a[href*="/art/"] img[src*="/v1/"]',
  1573.         r: /^(.+)\/v1\/\w+\/[^/]+\/(.+)-\d+.(\.\w+)(\?.+)/,
  1574.         s: ([, base, name, ext, tok], node) => {
  1575.           let v = Util.getReactChildren(node.closest('a'), 'props.deviation.media.types');
  1576.           return v && (v = v.find(t => t.t === 'fullview')) && `${base}${
  1577.             v.c ? v.c.replace('<prettyName>', name)
  1578.               : `/v1/fill/w_${v.w},h_${v.h}/${name}-fullview${ext}`}${tok}`;
  1579.         },
  1580.       }, {
  1581.         e: '.dev-view-deviation img',
  1582.         s: () => [
  1583.           $('.dev-page-download').href,
  1584.           $('.dev-content-full').src,
  1585.         ].filter(Boolean),
  1586.       }, {
  1587.         e: 'a[data-hook=deviation_link]',
  1588.         q: 'link[as=image]',
  1589.       }); break;
  1590.  
  1591.       case 'discord': rules.push({
  1592.         u: '||discordapp.net/external/',
  1593.         r: /\/https?\/(.+)/,
  1594.         s: '//$1',
  1595.         follow: true,
  1596.       }); break;
  1597.  
  1598.       case 'dropbox': rules.push({
  1599.         r: /(.+?&size_mode)=\d+(.*)/,
  1600.         s: '$1=5$2',
  1601.       }); break;
  1602.  
  1603.       case 'facebook': rules.push({
  1604.         e: 'a[href^="/photo/?"], a[href^="https://www.facebook.com/photo"]',
  1605.         s: (m, el) => (m = Util.getReactChildren(el.parentNode)) &&
  1606.           pick(m, (m[0] ? '0.props.linkProps' : 'props') + '.passthroughProps.origSrc'),
  1607.       }); break;
  1608.  
  1609.       case 'flickr': if (pick(unsafeWindow, 'YUI_config.flickr.api.site_key')) rules.push({
  1610.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1611.         s: m => `https://www.flickr.com/services/rest/?${
  1612.           new URLSearchParams({
  1613.             photo_id: m[1],
  1614.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1615.             method: 'flickr.photos.getSizes',
  1616.             format: 'json',
  1617.             nojsoncallback: 1,
  1618.           }).toString()}`,
  1619.         q: text => JSON.parse(text).sizes.size.pop().source,
  1620.         anonymous: true,
  1621.       }); break;
  1622.  
  1623.       case 'github': rules.push({
  1624.         r: new RegExp([
  1625.           /(avatars.+?&s=)\d+/,
  1626.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1627.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:avif|webp|png|jpe?g|bmp|gif|cur|ico|svg))$/,
  1628.         ].map(rx => rx.source).join('|')),
  1629.         s: m => `https://${
  1630.           m[1] ? `${m[1]}460` :
  1631.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1632.               $('.AppHeader-context-item > .octicon-lock')
  1633.                 ? `${m[4]}${m[5]}raw/${m[6]}`
  1634.                 : `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1635.         }`,
  1636.       }); break;
  1637.  
  1638.       case 'google': if (/[&?]tbm=isch(&|$)/.test(location.search)) rules.push({
  1639.         e: 'a[href*="imgres?imgurl="] img',
  1640.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1641.         follow: true,
  1642.       }, {
  1643.         e: '[data-tbnid] a:not([href])',
  1644.         s: (m, a) => {
  1645.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1646.           new MutationObserver((_, mo) => {
  1647.             mo.disconnect();
  1648.             App.isEnabled = true;
  1649.             a.alt = a2.innerText;
  1650.             const {left, top} = a.getBoundingClientRect();
  1651.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1652.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1653.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1654.           a2.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
  1655.         },
  1656.       }); break;
  1657.  
  1658.       case 'instagram': rules.push({
  1659.         e: 'a[href*="/p/"],' +
  1660.           'article [role="button"][tabindex="0"],' +
  1661.           'article [role="button"][tabindex="0"] div',
  1662.         s: (m, node, rule) => {
  1663.           let data, a, n, img, src;
  1664.           if (location.pathname.startsWith('/p/') || location.pathname.startsWith('/tv/')) {
  1665.             img = $('img[srcset], video', node.parentNode);
  1666.             if (img && (isVideo(img) || parseFloat(img.sizes) > 900))
  1667.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1668.           }
  1669.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1670.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1671.           }
  1672.           const numPics = a && pick(data, 'edge_sidecar_to_children.edges.length') ||
  1673.             a && pick(data, 'carousel_media_count');
  1674.           Ruler.toggle(rule, 'q', data && data.is_video && !data.video_url);
  1675.           Ruler.toggle(rule, 'g', a && (numPics > 1 || /<\w+[^>]+carousel/i.test(a.innerHTML)));
  1676.           rule.follow = !data && !rule.g;
  1677.           rule._data = data;
  1678.           rule._img = img;
  1679.           return (
  1680.             !a && !src ? false :
  1681.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1&__d=dis' : ''}` :
  1682.                 data.video_url || data.display_url);
  1683.         },
  1684.         c: (html, doc, node, rule) =>
  1685.           rule._getCaption(rule._data) || (rule._img || 0).alt || '',
  1686.         follow: true,
  1687.         _q: 'meta[property="og:video"]',
  1688.         _g(text, doc, url, m, rule) {
  1689.           const json = tryJSON(text);
  1690.           const media =
  1691.             pick(json, 'graphql.shortcode_media') ||
  1692.             pick(json, 'items.0');
  1693.           const items =
  1694.             pick(media, 'edge_sidecar_to_children.edges', res => res.map(e => ({
  1695.               url: e.node.video_url || e.node.display_url,
  1696.             }))) ||
  1697.             pick(media, 'carousel_media', res => res.map(e => ({
  1698.               url: pick(e, 'video_versions.0.url') || pick(e, 'image_versions2.candidates.0.url'),
  1699.             })));
  1700.           items.title = rule._getCaption(media) || '';
  1701.           return items;
  1702.         },
  1703.         _getCaption: data => pick(data, 'caption.text') ||
  1704.           pick(data, 'edge_media_to_caption.edges.0.node.text'),
  1705.       }); break;
  1706.  
  1707.       case 'reddit': rules.push({
  1708.         u: '||i.reddituploads.com/',
  1709.       }, {
  1710.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1711.         s: (m, node) => $propUp(node, 'data-url'),
  1712.       }, {
  1713.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1714.         s: 'https://i$1',
  1715.       }); break;
  1716.  
  1717.       case 'stackoverflow': rules.push({
  1718.         e: '.post-tag, .post-tag img',
  1719.         s: '',
  1720.       }); break;
  1721.  
  1722.       case 'startpage': rules.push({
  1723.         r: /[&?]piurl=([^&]+)/,
  1724.         s: '$1',
  1725.         follow: true,
  1726.       }); break;
  1727.  
  1728.       case 'tumblr': rules.push({
  1729.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1730.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1731.         follow: true,
  1732.       }); break;
  1733.  
  1734.       case 'twitter': rules.push({
  1735.         e: '.grid-tweet > .media-overlay',
  1736.         s: (m, node) => node.previousElementSibling.src,
  1737.         follow: true,
  1738.       }); break;
  1739.     }
  1740.  
  1741.     rules.push(
  1742.       {
  1743.         r: /[/?=](https?%3A%2F%2F[^&]+)/i,
  1744.         s: '$1',
  1745.         follow: true,
  1746.         onerror: 'skip',
  1747.       },
  1748.       {
  1749.         u: [
  1750.           '||500px.com/photo/',
  1751.           '||cl.ly/',
  1752.           '||cweb-pix.com/',
  1753.           '//ibb.co/',
  1754.           '||imgcredit.xyz/image/',
  1755.         ],
  1756.         r: /\.\w+\/.+/,
  1757.         q: 'meta[property="og:image"]',
  1758.       },
  1759.       {
  1760.         u: 'attachment.php',
  1761.         r: /attachment\.php.+attachmentid/,
  1762.       },
  1763.       {
  1764.         u: '||abload.de/image',
  1765.         q: '#image',
  1766.       },
  1767.       {
  1768.         u: '||deviantart.com/art/',
  1769.         s: (m, node) =>
  1770.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1771.             '' :
  1772.             m.input,
  1773.         q: [
  1774.           '#download-button[href*=".jpg"]',
  1775.           '#download-button[href*=".jpeg"]',
  1776.           '#download-button[href*=".gif"]',
  1777.           '#download-button[href*=".png"]',
  1778.           '#gmi-ResViewSizer_fullimg',
  1779.           'img.dev-content-full',
  1780.         ],
  1781.       },
  1782.       {
  1783.         u: '||dropbox.com/s',
  1784.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1785.         q: (text, doc) =>
  1786.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1787.       },
  1788.       {
  1789.         r: /[./]ebay\.[^/]+\/itm\//,
  1790.         q: text =>
  1791.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1792.             .replace(/~~60_\d+/, '~~60_57'),
  1793.       },
  1794.       {
  1795.         u: '||i.ebayimg.com/',
  1796.         s: (m, node) =>
  1797.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1798.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1799.       },
  1800.       {
  1801.         u: '||fastpic.',
  1802.         s: (m, node, rule) => {
  1803.           const a = node.closest('a');
  1804.           const url = decodeURIComponent(Req.findImageUrl(a || node))
  1805.             .replace(/\/i(\d+)\.(\w+\.\w+\/)\w+/, '/$2$1')
  1806.             .replace(/^\w+:\/\/fastpic[^/]+((?:\/\d+){3})\/\w+(\/\w+\.\w+).*/,
  1807.               'https://fastpic.org/view$1$2.html');
  1808.           Ruler.toggle(rule, 'q', url.includes('.html'));
  1809.           return a || url.includes('.png') ? url : [url, url.replace(/\.jpe?g/, '.png')];
  1810.         },
  1811.         _q: 'img[src*="/big/"]',
  1812.       },
  1813.       {
  1814.         u: '||flickr.com/photos/',
  1815.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1816.         s: m =>
  1817.           m.input.indexOf('/sizes/') < 0 ?
  1818.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1819.             false,
  1820.         q: (text, doc) => {
  1821.           const links = $$('.sizes-list a', doc);
  1822.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1823.         },
  1824.         follow: true,
  1825.       },
  1826.       {
  1827.         u: '||flickr.com/photos/',
  1828.         r: /\/sizes\//,
  1829.         q: '#allsizes-photo > img',
  1830.       },
  1831.       {
  1832.         u: '||gfycat.com/',
  1833.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1834.         s: 'https://$1$3',
  1835.         q: 'meta[content$=".webm"], #webmsource, source[src$=".webm"], .actual-gif-image',
  1836.       },
  1837.       {
  1838.         u: [
  1839.           '||googleusercontent.com/proxy',
  1840.           '||googleusercontent.com/gadgets/proxy',
  1841.         ],
  1842.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1843.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1844.       },
  1845.       {
  1846.         u: [
  1847.           '||googleusercontent.com/',
  1848.           '||ggpht.com/',
  1849.         ],
  1850.         s: m => m.input.includes('webcache.') ? '' :
  1851.           m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1852.             .replace(/([&?]sz)?=[-\w]+([&#].*)?/, ''),
  1853.       },
  1854.       {
  1855.         u: '||gravatar.com/',
  1856.         r: /([a-z0-9]{32})/,
  1857.         s: 'https://gravatar.com/avatar/$1?s=200',
  1858.       },
  1859.       {
  1860.         u: '//gyazo.com/',
  1861.         r: /\bgyazo\.com\/\w{32,}(\.\w+)?/,
  1862.         s: (m, _, rule) => Ruler.toggle(rule, 'q', !m[1]) ? m.input : `https://i.${m[0]}`,
  1863.         _q: 'link[rel="image_src"]',
  1864.       },
  1865.       {
  1866.         u: '||hostingkartinok.com/show-image.php',
  1867.         q: '.image img',
  1868.       },
  1869.       {
  1870.         u: [
  1871.           '||imagecurl.com/images/',
  1872.           '||imagecurl.com/viewer.php',
  1873.         ],
  1874.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1875.         s: 'https://imagecurl.com/images/$1$2$3',
  1876.       },
  1877.       {
  1878.         u: '||imagebam.com/',
  1879.         r: /^(https:\/\/)thumbs\d+(\.imagebam\.com\/).*?([^/]+)_t\./,
  1880.         s: '$1www$2view/$3',
  1881.         q: 'img.main-image',
  1882.       },
  1883.       {
  1884.         u: '||www.imagebam.com/view/',
  1885.         q: 'img.main-image',
  1886.       },
  1887.       {
  1888.         u: '||imageban.ru/thumbs',
  1889.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1890.         s: '$1out$2/$3/$4',
  1891.       },
  1892.       {
  1893.         u: [
  1894.           '||imageban.ru/show',
  1895.           '||imageban.net/show',
  1896.           '||ibn.im/',
  1897.         ],
  1898.         q: '#img_main',
  1899.       },
  1900.       {
  1901.         u: '||imageshack.us/img',
  1902.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1903.         s: 'https://$2/download/$1/$3$4',
  1904.       },
  1905.       {
  1906.         u: '||imageshack.us/i/',
  1907.         q: '#share-dl',
  1908.       },
  1909.       {
  1910.         u: '||imageteam.org/img',
  1911.         q: 'img[alt="image"]',
  1912.       },
  1913.       {
  1914.         u: [
  1915.           '||imagetwist.com/',
  1916.           '||imageshimage.com/',
  1917.         ],
  1918.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1919.         q: 'img.pic',
  1920.         xhr: true,
  1921.       },
  1922.       {
  1923.         u: '||imageupper.com/i/',
  1924.         q: '#img',
  1925.         xhr: true,
  1926.       },
  1927.       {
  1928.         u: '||imagevenue.com/',
  1929.         q: 'a[data-toggle="full"] img',
  1930.       },
  1931.       {
  1932.         u: '||imagezilla.net/show/',
  1933.         q: '#photo',
  1934.         xhr: true,
  1935.       },
  1936.       {
  1937.         u: [
  1938.           '||images-na.ssl-images-amazon.com/images/',
  1939.           '||media-imdb.com/images/',
  1940.         ],
  1941.         r: /images\/.+?\.jpg/,
  1942.         s: '/V1\\.?_.+?\\.//g',
  1943.       },
  1944.       {
  1945.         u: '||imgbox.com/',
  1946.         r: /\.com\/([a-z0-9]+)$/i,
  1947.         q: '#img',
  1948.         xhr: hostname !== 'imgbox.com',
  1949.       },
  1950.       {
  1951.         u: '||imgclick.net/',
  1952.         r: /\.net\/(\w+)/,
  1953.         q: 'img.pic',
  1954.         xhr: true,
  1955.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1956.       },
  1957.       {
  1958.         u: '.imgcredit.xyz/',
  1959.         r: /^https?(:.*\.xyz\/\d[\w/]+)\.md(.+)/,
  1960.         s: ['https$1$2', 'https$1.png'],
  1961.       },
  1962.       {
  1963.         u: [
  1964.           '||imgflip.com/i/',
  1965.           '||imgflip.com/gif/',
  1966.         ],
  1967.         r: /\/(i|gif)\/([^/?#]+)/,
  1968.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1969.       },
  1970.       {
  1971.         u: [
  1972.           '||imgur.com/a/',
  1973.           '||imgur.com/gallery/',
  1974.         ],
  1975.         s: 'gallery', // suppressing an unused network request for remote `document`
  1976.         async g() {
  1977.           let u = `https://imgur.com/ajaxalbums/getimages/${ai.url.split(/[/?#]/)[4]}/hit.json?all=true`;
  1978.           let info = tryJSON((await Req.gmXhr(u)).responseText) || 0;
  1979.           let images = (info.data || 0).images || [];
  1980.           if (!images[0]) {
  1981.             info = (await Req.gmXhr(ai.url)).responseText.match(/postDataJSON=(".*?")<|$/)[1];
  1982.             info = tryJSON(tryJSON(info)) || 0;
  1983.             images = info.media;
  1984.           }
  1985.           const items = [];
  1986.           for (const img of images) {
  1987.             const meta = img.metadata || img;
  1988.             items.push({
  1989.               url: img.url ||
  1990.                 (u = `https://i.imgur.com/${img.hash}`) && (
  1991.                   img.ext === '.gif' && img.animated !== false ?
  1992.                     [`${u}.webm`, `${u}.mp4`, u] :
  1993.                     u + img.ext
  1994.                 ),
  1995.               desc: [meta.title, meta.description].filter(Boolean).join(' - '),
  1996.             });
  1997.           }
  1998.           if (items[0] && info.title && !`${items[0].desc || ''}`.includes(info.title))
  1999.             items.title = info.title;
  2000.           return items;
  2001.         },
  2002.       },
  2003.       {
  2004.         u: '||imgur.com/',
  2005.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  2006.         s: 'gallery',
  2007.         g: (text, doc, url, m) =>
  2008.           m[2].split(',').map(id => ({
  2009.             url: `https://i.${m[1]}${id}.jpg`,
  2010.           })),
  2011.       },
  2012.       {
  2013.         u: '||imgur.com/',
  2014.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.(mp4|[a-z]+))/i,
  2015.         s: (m, node) => {
  2016.           if (/memegen|random|register|search|signin/.test(m.input))
  2017.             return '';
  2018.           const a = node.closest('a');
  2019.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  2020.             return false;
  2021.           // postfixes: huge, large, medium, thumbnail, big square, small square
  2022.           const id = m[3].replace(/(.{7})[hlmtbs]$/, '$1');
  2023.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  2024.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  2025.           return ext === 'webm' ?
  2026.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  2027.             u + ext;
  2028.         },
  2029.       },
  2030.       {
  2031.         u: [
  2032.           '||instagr.am/p/',
  2033.           '||instagram.com/p/',
  2034.           '||instagram.com/tv/',
  2035.         ],
  2036.         s: m => m.input.substr(0, m.input.lastIndexOf('/')).replace('/liked_by', '') +
  2037.         '/?__a=1&__d=dis',
  2038.         q: m => (m = tryJSON(m)) && (
  2039.           m = pick(m, 'graphql.shortcode_media') || pick(m, 'items.0') || 0
  2040.         ) && (
  2041.           m.video_url ||
  2042.           m.display_url ||
  2043.           pick(m, 'video_versions.0.url') ||
  2044.           pick(m, 'carousel_media.0.image_versions2.candidates.0.url') ||
  2045.           pick(m, 'image_versions2.candidates.0.url')
  2046.         ),
  2047.         rect: 'div.PhotoGridMediaItem',
  2048.         c: m => (m = tryJSON(m)) && (
  2049.           pick(m, 'items.0.caption.text') ||
  2050.           pick(m, 'graphql.shortcode_media.edge_media_to_caption.edges.0.node.text') ||
  2051.           ''
  2052.         ),
  2053.       },
  2054.       {
  2055.         u: [
  2056.           '||livememe.com/',
  2057.           '||lvme.me/',
  2058.         ],
  2059.         r: /\.\w+\/([^.]+)$/,
  2060.         s: 'http://i.lvme.me/$1.jpg',
  2061.       },
  2062.       {
  2063.         u: '||lostpic.net/image',
  2064.         q: '.image-viewer-image img',
  2065.       },
  2066.       {
  2067.         u: '||makeameme.org/meme/',
  2068.         r: /\/meme\/([^/?#]+)/,
  2069.         s: 'https://media.makeameme.org/created/$1.jpg',
  2070.       },
  2071.       {
  2072.         u: '||photobucket.com/',
  2073.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  2074.         s: 'https://i$1$3',
  2075.         xhr: !dotDomain.endsWith('.photobucket.com'),
  2076.       },
  2077.       {
  2078.         u: '||piccy.info/view3/',
  2079.         r: /(.+?\/view3)\/(.*)\//,
  2080.         s: '$1/$2/orig/',
  2081.         q: '#mainim',
  2082.       },
  2083.       {
  2084.         u: '||pimpandhost.com/image/',
  2085.         r: /(.+?\/image\/[0-9]+)/,
  2086.         s: '$1?size=original',
  2087.         q: 'img.original',
  2088.       },
  2089.       {
  2090.         u: [
  2091.           '||pixroute.com/',
  2092.           '||imgspice.com/',
  2093.         ],
  2094.         r: /\.html$/,
  2095.         q: 'img[id]',
  2096.         xhr: true,
  2097.       },
  2098.       {
  2099.         u: '||postima',
  2100.         r: /postima?ge?\.org\/image\/\w+/,
  2101.         q: [
  2102.           'a[href*="dl="]',
  2103.           '#main-image',
  2104.         ],
  2105.       },
  2106.       {
  2107.         u: [
  2108.           '||prntscr.com/',
  2109.           '||prnt.sc/',
  2110.         ],
  2111.         r: /\.\w+\/.+/,
  2112.         q: 'meta[property="og:image"]',
  2113.         xhr: true,
  2114.       },
  2115.       {
  2116.         u: '||radikal.ru/',
  2117.         r: /\.ru\/(fp|.+?\.html)|^(.+?)t\.jpg/,
  2118.         s: (m, node, rule) =>
  2119.           m[2] && /radikal\.ru[\w%/]+?(\.\w+)/.test($propUp(node, 'href')) ? m[2] + RegExp.$1 :
  2120.             Ruler.toggle(rule, 'q', m[1]) ? m.input : [m[2] + '.jpg', m[2] + '.png'],
  2121.         _q: text => text.match(/https?:\/\/\w+\.radikal\.ru[\w/]+\.(jpg|gif|png)/i)[0],
  2122.       },
  2123.       {
  2124.         u: '||tumblr.com',
  2125.         r: /_500\.jpg/,
  2126.         s: ['/_500/_1280/', ''],
  2127.       },
  2128.       {
  2129.         u: '||twimg.com/media/',
  2130.         r: /.+?format=(jpe?g|png|gif)/i,
  2131.         s: '$0&name=orig',
  2132.       },
  2133.       {
  2134.         u: '||twimg.com/media/',
  2135.         r: /.+?\.(jpe?g|png|gif)/i,
  2136.         s: '$0:orig',
  2137.       },
  2138.       {
  2139.         u: '||twimg.com/1/proxy',
  2140.         r: /t=([^&_]+)/i,
  2141.         s: m => atob(m[1]).match(/http.+/),
  2142.       },
  2143.       {
  2144.         u: '||twimg.com/',
  2145.         r: /\/profile_images/i,
  2146.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  2147.       },
  2148.       {
  2149.         u: '||pic.twitter.com/',
  2150.         r: /\.com\/[a-z0-9]+/i,
  2151.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  2152.         follow: true,
  2153.       },
  2154.       {
  2155.         u: '||twitpic.com/',
  2156.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  2157.         s: 'https://twitpic.com/show/large/$2',
  2158.       },
  2159.       {
  2160.         u: '||wiki',
  2161.         r: /\/(?:thumb|images)\/.+\.(?:jpe?g|gif|png|svg)/i,
  2162.         s: m => m.input.replace(/\/(thumb(?=\/)|\d+px[^/]+(?=$|\?))/g, '')
  2163.           .replace(/\/(scale-to-width(-[a-z]+)?\/\d+|(zoom-crop|smart)(\/(width|height)\/\d+)+)/g, '/'),
  2164.         xhr: !hostname.includes('wiki'),
  2165.       },
  2166.       {
  2167.         u: '||ytimg.com/vi/',
  2168.         r: /(.+?\/vi\/[^/]+)/,
  2169.         s: '$1/0.jpg',
  2170.         rect: '.video-list-item',
  2171.       },
  2172.       {
  2173.         u: '/viewer.php?file=',
  2174.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  2175.         s: '$1/images/$2',
  2176.         xhr: true,
  2177.       },
  2178.       {
  2179.         u: '/thumb_',
  2180.         r: /\/albums.+\/thumb_[^/]/,
  2181.         s: '/thumb_//',
  2182.       },
  2183.       {
  2184.         u: [
  2185.           '.th.jp',
  2186.           '.th.gif',
  2187.           '.th.png',
  2188.         ],
  2189.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  2190.         s: '$1$2',
  2191.         follow: true,
  2192.       },
  2193.       {
  2194.         r: RX_MEDIA_URL,
  2195.       }
  2196.     );
  2197.   },
  2198.  
  2199.   format(rule, {expand} = {}) {
  2200.     const s = Util.stringify(rule, null, ' ');
  2201.     return expand ?
  2202.       /* {"a": ...,
  2203.           "b": ...,
  2204.           "c": ...
  2205.          } */
  2206.       s.replace(/^{\s+/g, '{') :
  2207.       /* {"a": ..., "b": ..., "c": ...} */
  2208.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  2209.   },
  2210.  
  2211.   fromElement(el) {
  2212.     const text = el.textContent.trim();
  2213.     if (text.startsWith('{') &&
  2214.         text.endsWith('}') &&
  2215.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text)) {
  2216.       const rule = tryJSON(text);
  2217.       return rule && Object.keys(rule).some(k => /^[degqrsu]$/.test(k)) && rule;
  2218.     }
  2219.   },
  2220.  
  2221.   isValidE2: ([k, v]) => k.trim() && typeof v === 'string' && v.trim(),
  2222.  
  2223.   /** @returns mpiv.HostRule | Error | false | undefined */
  2224.   parse(rule) {
  2225.     const isBatchOp = this instanceof Map;
  2226.     try {
  2227.       if (typeof rule === 'string')
  2228.         rule = JSON.parse(rule);
  2229.       if ('d' in rule && typeof rule.d !== 'string')
  2230.         rule.d = undefined;
  2231.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  2232.         return false;
  2233.       let {e} = rule;
  2234.       if (e != null) {
  2235.         e = typeof e === 'string' ? e.trim()
  2236.           : isArray(e) ? e.join(',').trim()
  2237.             : Object.entries(e).every(Ruler.isValidE2) && e;
  2238.         if (!e)
  2239.           throw new Error('Invalid syntax for "e". Examples: ' +
  2240.             '"e": ".image" or ' +
  2241.             '"e": [".image1", ".image2"] or ' +
  2242.             '"e": {".parent": ".image"} or ' +
  2243.             '"e": {".parent1": ".image1", ".parent2": ".image2"}');
  2244.         if (isBatchOp) rule.e = e || undefined;
  2245.       }
  2246.       let compileTo = isBatchOp ? rule : {};
  2247.       if (rule.r)
  2248.         compileTo.r = new RegExp(rule.r, 'i');
  2249.       if (App.NOP)
  2250.         compileTo = {};
  2251.       for (const key of Object.keys(FN_ARGS)) {
  2252.         if (RX_HAS_CODE.test(rule[key])) {
  2253.           const fn = Util.newFunction(...FN_ARGS[key], rule[key]);
  2254.           if (fn !== App.NOP || !isBatchOp) {
  2255.             compileTo[key] = fn;
  2256.           } else if (isBatchOp) {
  2257.             this.set(rule, 'unsafe-eval');
  2258.           }
  2259.         }
  2260.       }
  2261.       return rule;
  2262.     } catch (err) {
  2263.       if (isBatchOp) {
  2264.         this.set(rule, err);
  2265.         return rule;
  2266.       } else {
  2267.         return err;
  2268.       }
  2269.     }
  2270.   },
  2271.  
  2272.   runC(text, doc = document) {
  2273.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  2274.     ai.caption = fn(text, doc);
  2275.   },
  2276.  
  2277.   runCHandler: {
  2278.     function: (text, doc) =>
  2279.       ai.rule.c(text || doc.documentElement.outerHTML, doc, ai.node, ai.rule),
  2280.     string: (text, doc) => {
  2281.       const el = $many(ai.rule.c, doc);
  2282.       return !el ? '' :
  2283.         el.getAttribute('content') ||
  2284.         el.getAttribute('title') ||
  2285.         el.textContent;
  2286.     },
  2287.     default: (text, doc, el = ai.node) =>
  2288.       (ai.tooltip || 0).text ||
  2289.       el.alt ||
  2290.       $propUp(el, 'title') ||
  2291.       Req.getFileName(
  2292.         el.tagName === (ai.popup || 0).tagName
  2293.           ? ai.url
  2294.           : el.src || $propUp(el, 'href')),
  2295.   },
  2296.  
  2297.   runQ(text, doc, docUrl) {
  2298.     let url;
  2299.     if (isFunction(ai.rule.q)) {
  2300.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  2301.       if (isArray(url)) {
  2302.         ai.urls = url.slice(1);
  2303.         url = url[0];
  2304.       }
  2305.     } else {
  2306.       const el = $many(ai.rule.q, doc);
  2307.       url = Req.findImageUrl(el, docUrl);
  2308.     }
  2309.     return url;
  2310.   },
  2311.  
  2312.   /** @returns {?boolean|mpiv.RuleMatchInfo} */
  2313.   runE(rule, e, node) {
  2314.     let p, img, res, info;
  2315.     for (const selParent in e) {
  2316.       if ((p = node.closest(selParent)) && (img = $(e[selParent], p))) {
  2317.         if (img === node)
  2318.           res = true;
  2319.         else if ((info = RuleMatcher.adaptiveFind(img, {rules: [rule]})))
  2320.           return info;
  2321.       }
  2322.     }
  2323.     return res;
  2324.   },
  2325.  
  2326.   /** @returns {?Array} if falsy then the rule should be skipped */
  2327.   runS(node, rule, m) {
  2328.     let urls = [], u;
  2329.     for (const s of ensureArray(rule.s))
  2330.       urls.push(
  2331.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  2332.           isFunction(s) ? s(m, node, rule) :
  2333.             s);
  2334.     if (rule.q && urls.length > 1) {
  2335.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  2336.       return;
  2337.     }
  2338.     if (isArray(u = urls[0]))
  2339.       u = [urls = u][0];
  2340.     return u === '' /* "stop all rules" */ ? urls
  2341.       : u && arrayFrom(new Set(urls), Util.decodeUrl);
  2342.   },
  2343.  
  2344.   /** @returns {boolean} */
  2345.   runU(rule, url) {
  2346.     const u = rule[SYM_U] || (rule[SYM_U] = UrlMatcher(rule.u));
  2347.     return u.fn.call(u.data, url);
  2348.   },
  2349.  
  2350.   substituteSingle(s, m) {
  2351.     if (!m || m.input == null) return s;
  2352.     if (s.startsWith('/') && !s.startsWith('//')) {
  2353.       const mid = s.search(/[^\\]\//) + 1;
  2354.       const end = s.lastIndexOf('/');
  2355.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  2356.       return m.input.replace(re, s.slice(mid + 1, end));
  2357.     }
  2358.     if (m.length && s.includes('$')) {
  2359.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  2360.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  2361.         for (let i = maxLength; i >= 0; i--) {
  2362.           const part = num.slice(0, i) | 0;
  2363.           if (part < m.length)
  2364.             return (m[part] || '') + num.slice(i);
  2365.         }
  2366.         return text;
  2367.       });
  2368.     }
  2369.     return s;
  2370.   },
  2371.  
  2372.   toggle(rule, prop, condition) {
  2373.     rule[prop] = condition ? rule[`_${prop}`] : null;
  2374.     return condition;
  2375.   },
  2376. };
  2377.  
  2378. const RuleMatcher = {
  2379.  
  2380.   /** @returns {Object} */
  2381.   adaptiveFind(node, opts) {
  2382.     const tn = node.tagName;
  2383.     const src = node.currentSrc || node.src || '';
  2384.     const isPic = tn === 'IMG' || tn === 'VIDEO' && Util.isVideoUrlExt(src);
  2385.     let a, info, url;
  2386.     // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  2387.     if (tn !== 'A') {
  2388.       url = isPic && !src.startsWith('data:') && Util.rel2abs(src);
  2389.       info = RuleMatcher.find(url, node, opts);
  2390.     }
  2391.     if (!info && (a = node.closest('A'))) {
  2392.       const ds = a.dataset;
  2393.       url = ds.expandedUrl || ds.fullUrl || ds.url || a.href || '';
  2394.       url = url.includes('//t.co/') ? 'https://' + a.textContent : url;
  2395.       url = !url.startsWith('data:') && url;
  2396.       info = RuleMatcher.find(url, a, opts);
  2397.     }
  2398.     if (!info && isPic)
  2399.       info = {node, rule: {}, url: src};
  2400.     return info;
  2401.   },
  2402.  
  2403.   /** @returns ?mpiv.RuleMatchInfo */
  2404.   find(url, node, {noHtml, rules, skipRules} = {}) {
  2405.     let tn, isPic, html, h;
  2406.     for (const rule of rules || Ruler.rules) {
  2407.       let e, m;
  2408.       if (skipRules && skipRules.includes(rule) ||
  2409.           rule.u && (!url || !Ruler.runU(rule, url)) ||
  2410.           !rules && (e = rule.e) &&
  2411.             !(m = typeof e === 'string' ? node.matches(e) : Ruler.runE(rule, e, node)))
  2412.         continue;
  2413.       if (m && m.url)
  2414.         return m;
  2415.       const {r, s} = rule;
  2416.       let hasS = s != null;
  2417.       h = !(noHtml && rule === ai.rule) && (r || hasS) && rule.html && (html || (html = node.outerHTML));
  2418.       if (r) {
  2419.         m = h ? r.exec(h) : url && r.exec(url);
  2420.       } else {
  2421.         m = ['']; m[0] = m.input = h || url || ''; m.index = 0;
  2422.       }
  2423.       if (!m)
  2424.         continue;
  2425.       if (s === '')
  2426.         return {};
  2427.       // a rule with follow:true for the currently hovered IMG produced a URL,
  2428.       // but we'll only allow it to match rules without 's' in the nested find call
  2429.       if (!hasS && !skipRules && (tn ? isPic : isPic = (tn = node.tagName) === 'IMG' || tn === 'VIDEO'))
  2430.         continue;
  2431.       hasS &= s !== 'gallery';
  2432.       const urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  2433.       if (urls)
  2434.         return RuleMatcher.makeInfo(hasS, rule, m, node, skipRules, urls);
  2435.     }
  2436.   },
  2437.  
  2438.   /** @returns ?mpiv.RuleMatchInfo */
  2439.   makeInfo(hasS, rule, match, node, skipRules, urls) {
  2440.     let info;
  2441.     let url = `${urls[0]}`;
  2442.     const follow = url && hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule);
  2443.     if (url)
  2444.       url = Util.rel2abs(url);
  2445.     else
  2446.       info = {};
  2447.     if (follow)
  2448.       info = RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]});
  2449.     if (!info && (!follow || RX_MEDIA_URL.test(url))) {
  2450.       const xhr = cfg.xhr && rule.xhr;
  2451.       info = {
  2452.         match,
  2453.         node,
  2454.         rule,
  2455.         url,
  2456.         urls: urls.length > 1 ? urls.slice(1) : null,
  2457.         gallery: rule.g && Gallery.makeParser(rule.g),
  2458.         post: isFunction(rule.post) ? rule.post(match) : rule.post,
  2459.         xhr: xhr != null ? xhr : isSecureContext && !url.startsWith(location.protocol),
  2460.       };
  2461.     }
  2462.     return info;
  2463.   },
  2464.  
  2465.   isFollowableUrl(url, rule) {
  2466.     const f = rule.follow;
  2467.     return isFunction(f) ? f(url) : f;
  2468.   },
  2469. };
  2470.  
  2471. const Req = {
  2472.  
  2473.   gmXhr(url, opts = {}) {
  2474.     if (ai.req)
  2475.       tryCatch(ai.req.abort);
  2476.     return new Promise((resolve, reject) => {
  2477.       const {anonymous} = ai.rule || {};
  2478.       ai.req = GM.xmlHttpRequest(Object.assign({
  2479.         url,
  2480.         anonymous,
  2481.         withCredentials: !anonymous,
  2482.         method: 'GET',
  2483.         timeout: 30e3,
  2484.       }, opts, {
  2485.         onload: done,
  2486.         onerror: done,
  2487.         ontimeout() {
  2488.           ai.req = null;
  2489.           reject(`Timeout fetching ${url}`);
  2490.         },
  2491.       }));
  2492.       function done(r) {
  2493.         ai.req = null;
  2494.         if (r.status < 400 && !r.error)
  2495.           resolve(r);
  2496.         else
  2497.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2498.       }
  2499.     });
  2500.   },
  2501.  
  2502.   async getDoc(url) {
  2503.     if (!url) {
  2504.       // current document
  2505.       return {
  2506.         doc,
  2507.         finalUrl: location.href,
  2508.         responseText: doc.documentElement.outerHTML,
  2509.       };
  2510.     }
  2511.     const r = await (!ai.post ?
  2512.       Req.gmXhr(url) :
  2513.       Req.gmXhr(url, {
  2514.         method: 'POST',
  2515.         data: ai.post,
  2516.         headers: {
  2517.           'Content-Type': 'application/x-www-form-urlencoded',
  2518.           'Referer': url,
  2519.         },
  2520.       }));
  2521.     r.doc = $parseHtml(r.responseText);
  2522.     return r;
  2523.   },
  2524.  
  2525.   async getImage(url, pageUrl, xhr = ai.xhr) {
  2526.     ai.bufBar = false;
  2527.     ai.bufStart = now();
  2528.     const response = await Req.gmXhr(url, {
  2529.       responseType: 'blob',
  2530.       headers: {
  2531.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2532.         Referer: pageUrl || (isFunction(xhr) ? xhr() : url),
  2533.       },
  2534.       onprogress: Req.getImageProgress,
  2535.     });
  2536.     Bar.set(false);
  2537.     const type = Req.guessMimeType(response);
  2538.     let b = response.response;
  2539.     if (!b) throw 'Empty response';
  2540.     if (b.type !== type)
  2541.       b = b.slice(0, b.size, type);
  2542.     const res = xhr === 'blob'
  2543.       ? (ai.blobUrl = URL.createObjectURL(b))
  2544.       : await Req.blobToDataUrl(b);
  2545.     return [res, type.startsWith('video')];
  2546.   },
  2547.  
  2548.   getImageProgress(e) {
  2549.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2550.       ai.bufBar = true;
  2551.     if (ai.bufBar) {
  2552.       const pct = e.loaded / e.total * 100 | 0;
  2553.       const size = e.total / 1024 | 0;
  2554.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2555.     }
  2556.   },
  2557.  
  2558.   async findRedirect() {
  2559.     try {
  2560.       const {finalUrl} = await Req.gmXhr(ai.url, {
  2561.         method: 'HEAD',
  2562.         headers: {
  2563.           'Referer': location.href.split('#', 1)[0],
  2564.         },
  2565.       });
  2566.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2567.       if (!info || !info.url)
  2568.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2569.       Object.assign(ai, info);
  2570.       App.startSingle();
  2571.     } catch (e) {
  2572.       App.handleError(e);
  2573.     }
  2574.   },
  2575.  
  2576.   async saveFile() {
  2577.     const url = ai.popup.src || ai.popup.currentSrc;
  2578.     let name = Req.getFileName(ai.imageUrl || url);
  2579.     if (!name.includes('.'))
  2580.       name += '.jpg';
  2581.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2582.       $new('a', {href: url, download: name})
  2583.         .dispatchEvent(new MouseEvent('click'));
  2584.     } else {
  2585.       Status.set('+loading');
  2586.       const onload = () => Status.set('-loading');
  2587.       const gmDL = typeof GM_download === 'function';
  2588.       (gmDL ? GM_download : GM.xmlHttpRequest)({
  2589.         url,
  2590.         name,
  2591.         headers: {Referer: url},
  2592.         method: 'get', // polyfilling GM_download
  2593.         responseType: 'blob', // polyfilling GM_download
  2594.         overrideMimeType: 'application/octet-stream', // polyfilling GM_download
  2595.         onerror: e => {
  2596.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2597.           onload();
  2598.         },
  2599.         onprogress: Req.getImageProgress,
  2600.         onload({response}) {
  2601.           onload();
  2602.           if (!gmDL) { // polyfilling GM_download
  2603.             const a = Object.assign(document.createElement('a'), {
  2604.               href: URL.createObjectURL(response),
  2605.               download: name,
  2606.             });
  2607.             a.dispatchEvent(new MouseEvent('click'));
  2608.             setTimeout(URL.revokeObjectURL, 10e3, a.href);
  2609.           }
  2610.         },
  2611.       });
  2612.     }
  2613.   },
  2614.  
  2615.   getFileName(url) {
  2616.     return decodeURIComponent(url).split(/[#?&]/, 1)[0].split('/').pop();
  2617.   },
  2618.  
  2619.   blobToDataUrl(blob) {
  2620.     return new Promise((resolve, reject) => {
  2621.       const fr = new FileReader();
  2622.       fr.onload = () => resolve(fr.result);
  2623.       fr.onerror = reject;
  2624.       fr.readAsDataURL(blob);
  2625.     });
  2626.   },
  2627.  
  2628.   guessMimeType({responseHeaders, finalUrl}) {
  2629.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2630.         !RegExp.$1.includes('text/plain'))
  2631.       return RegExp.$1;
  2632.     const ext = Util.extractFileExt(finalUrl) || 'jpg';
  2633.     switch (ext.toLowerCase()) {
  2634.       case 'bmp': return 'image/bmp';
  2635.       case 'gif': return 'image/gif';
  2636.       case 'jpe': return 'image/jpeg';
  2637.       case 'jpeg': return 'image/jpeg';
  2638.       case 'jpg': return 'image/jpeg';
  2639.       case 'mp4': return 'video/mp4';
  2640.       case 'png': return 'image/png';
  2641.       case 'svg': return 'image/svg+xml';
  2642.       case 'tif': return 'image/tiff';
  2643.       case 'tiff': return 'image/tiff';
  2644.       case 'webm': return 'video/webm';
  2645.       default: return 'application/octet-stream';
  2646.     }
  2647.   },
  2648.  
  2649.   findImageUrl(n, url) {
  2650.     if (!n) return;
  2651.     let html;
  2652.     const path =
  2653.       n.getAttribute('data-src') || // lazy loaded src, whereas current `src` is an empty 1x1 pixel
  2654.       n.getAttribute('src') ||
  2655.       n.getAttribute('data-m4v') ||
  2656.       n.getAttribute('href') ||
  2657.       n.getAttribute('content') ||
  2658.       (html = n.outerHTML).includes('http') &&
  2659.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2660.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2661.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2662.   },
  2663. };
  2664.  
  2665. const Status = {
  2666.  
  2667.   set(status) {
  2668.     if (!status && !cfg.globalStatus) {
  2669.       if (ai.node) ai.node.removeAttribute(STATUS_ATTR);
  2670.       return;
  2671.     }
  2672.     const prefix = cfg.globalStatus ? PREFIX : '';
  2673.     const action = status && /^[+-]/.test(status) && status[0];
  2674.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2675.     const el = cfg.globalStatus ? doc.documentElement :
  2676.       name === 'edge' ? ai.popup :
  2677.         ai.node;
  2678.     if (!el) return;
  2679.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2680.     const oldValue = (el.getAttribute(attr) || '').trim();
  2681.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2682.     switch (action) {
  2683.       case '-':
  2684.         cls.delete(name);
  2685.         break;
  2686.       case false:
  2687.         for (const c of cls)
  2688.           if (c.startsWith(prefix) && c !== name)
  2689.             cls.delete(c);
  2690.       // fallthrough to +
  2691.       case '+':
  2692.         if (name)
  2693.           cls.add(name);
  2694.         break;
  2695.     }
  2696.     const newValue = [...cls].join(' ');
  2697.     if (newValue !== oldValue)
  2698.       el.setAttribute(attr, newValue);
  2699.   },
  2700.  
  2701.   loading(force) {
  2702.     if (!force) {
  2703.       clearTimeout(ai.timerStatus);
  2704.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2705.     } else if (!ai.popupLoaded) {
  2706.       Status.set('+loading');
  2707.     }
  2708.   },
  2709. };
  2710.  
  2711. const UrlMatcher = (() => {
  2712.   // string-to-regexp escaped chars
  2713.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2714.   // rx for '^' symbol in simple url match
  2715.   const RX_SEP = /[^\w%._-]/y;
  2716.   const RXS_SEP = RX_SEP.source;
  2717.   return match => {
  2718.     const results = [];
  2719.     for (const s of ensureArray(match)) {
  2720.       const pinDomain = s.startsWith('||');
  2721.       const pinStart = !pinDomain && s.startsWith('|');
  2722.       const endSep = s.endsWith('^');
  2723.       let fn;
  2724.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2725.       if (needle.includes('^')) {
  2726.         let plain = '';
  2727.         for (const part of needle.split('^'))
  2728.           if (part.length > plain.length)
  2729.             plain = part;
  2730.         const rx = new RegExp(
  2731.           (pinStart ? '^' : '') +
  2732.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2733.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2734.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2735.         needle = [plain, rx];
  2736.         fn = regexp;
  2737.       } else if (pinStart) {
  2738.         fn = endSep ? equals : starts;
  2739.       } else if (pinDomain) {
  2740.         const slashPos = needle.indexOf('/');
  2741.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2742.         needle = [needle, domain, slashPos > 0, endSep];
  2743.         fn = startsDomainPrescreen;
  2744.       } else if (endSep) {
  2745.         fn = ends;
  2746.       } else {
  2747.         fn = has;
  2748.       }
  2749.       results.push({fn, data: needle});
  2750.     }
  2751.     return results.length > 1 ?
  2752.       {fn: checkArray, data: results} :
  2753.       results[0];
  2754.   };
  2755.   function checkArray(s) {
  2756.     return this.some(checkArrayItem, s);
  2757.   }
  2758.   function checkArrayItem(item) {
  2759.     return item.fn.call(item.data, this);
  2760.   }
  2761.   function ends(s) {
  2762.     return s.endsWith(this) || (
  2763.       s.length > this.length &&
  2764.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2765.       endsWithSep(s));
  2766.   }
  2767.   function endsWithSep(s, pos = s.length - 1) {
  2768.     RX_SEP.lastIndex = pos;
  2769.     return RX_SEP.test(s);
  2770.   }
  2771.   function equals(s) {
  2772.     return s.startsWith(this) && (
  2773.       s.length === this.length ||
  2774.       s.length === this.length + 1 && endsWithSep(s));
  2775.   }
  2776.   function has(s) {
  2777.     return s.includes(this);
  2778.   }
  2779.   function regexp(s) {
  2780.     return s.includes(this[0]) && this[1].test(s);
  2781.   }
  2782.   function starts(s) {
  2783.     return s.startsWith(this);
  2784.   }
  2785.   function startsDomainPrescreen(url) {
  2786.     return url.includes(this[0]) && startsDomain.call(this, url);
  2787.   }
  2788.   function startsDomain(url) {
  2789.     let hostStart = url.indexOf('//');
  2790.     if (hostStart && url[hostStart - 1] !== ':')
  2791.       return;
  2792.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2793.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2794.     const [needle, domain, pinDomainEnd, endSep] = this;
  2795.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2796.     for (; ; start++) {
  2797.       start = host.indexOf(domain, start);
  2798.       if (start < 0)
  2799.         return;
  2800.       if (!start || host[start - 1] === '.')
  2801.         break;
  2802.     }
  2803.     start += hostStart;
  2804.     if (url.lastIndexOf(needle, start) !== start)
  2805.       return;
  2806.     const end = start + needle.length;
  2807.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2808.   }
  2809. })();
  2810.  
  2811. const Util = {
  2812.  
  2813.   addStyle(name, css) {
  2814.     const id = `${PREFIX}style:${name}`;
  2815.     const el = doc.getElementById(id) ||
  2816.                css && $new('style', {id});
  2817.     if (!el) return;
  2818.     if (el.textContent !== css)
  2819.       el.textContent = css;
  2820.     if (el.parentElement !== doc.head)
  2821.       doc.head.appendChild(el);
  2822.     return el;
  2823.   },
  2824.  
  2825.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2826.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2827.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2828.   },
  2829.  
  2830.   decodeHtmlEntities(s) {
  2831.     return s
  2832.       .replace(/&quot;/g, '"')
  2833.       .replace(/&apos;/g, '\'')
  2834.       .replace(/&lt;/g, '<')
  2835.       .replace(/&gt;/g, '>')
  2836.       .replace(/&amp;/g, '&');
  2837.   },
  2838.  
  2839.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2840.   decodeUrl(url) {
  2841.     if (!url || typeof url !== 'string') return url;
  2842.     const iPct = url.indexOf('%');
  2843.     const iColon = url.indexOf(':');
  2844.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2845.       decodeURIComponent(url) :
  2846.       url;
  2847.   },
  2848.  
  2849.   deepEqual(a, b) {
  2850.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2851.       return a === b;
  2852.     if (isArray(a)) {
  2853.       return isArray(b) &&
  2854.         a.length === b.length &&
  2855.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2856.     }
  2857.     const keys = Object.keys(a);
  2858.     return keys.length === Object.keys(b).length &&
  2859.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2860.   },
  2861.  
  2862.   extractFileExt: url => (url = RX_MEDIA_URL.exec(url)) && url[1],
  2863.  
  2864.   forceLayout(node) {
  2865.     // eslint-disable-next-line no-unused-expressions
  2866.     node.clientHeight;
  2867.   },
  2868.  
  2869.   formatError(e, rule) {
  2870.     const arr = isArray(e);
  2871.     const msg = arr ? e[0] : e.message;
  2872.     const {url: u, imageUrl: iu} = ai;
  2873.     e = msg ? e :
  2874.       e.readyState && 'Request failed.' ||
  2875.       e.type === 'error' && `File can't be displayed.${
  2876.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2877.       }` ||
  2878.       e;
  2879.     let fmt;
  2880.     const res = [
  2881.       fmt = '%c%s%c', 'font-weight:bold', arr ? msg : e, 'font-weight:normal',
  2882.       (fmt += '\nNode: %o', ai.node),
  2883.       (fmt += '\nRule: %o', rule),
  2884.       u && (fmt += '\nURL: %s', u),
  2885.       iu && iu !== u && (fmt += '\nFile: %s', iu),
  2886.       ...arr ? (fmt += e[1], e.slice(2)) : [],
  2887.       e.stack,
  2888.     ].filter(Boolean);
  2889.     res[0] = fmt;
  2890.     res.message = msg || e;
  2891.     return res;
  2892.   },
  2893.  
  2894.   getReactChildren(el, path) {
  2895.     if (isFF) el = el.wrappedJSObject || el;
  2896.     for (const k of Object.keys(el))
  2897.       if (typeof k === 'string' && k.startsWith('__reactProps'))
  2898.         return (el = el[k].children) && (path ? pick(el, path) : el);
  2899.   },
  2900.  
  2901.   isVideoUrl: url => url.startsWith('data:video') || Util.isVideoUrlExt(url),
  2902.  
  2903.   isVideoUrlExt: url => (url = Util.extractFileExt(url)) && /^(webm|mp4)$/i.test(url),
  2904.  
  2905.   newFunction(...args) {
  2906.     try {
  2907.       return App.NOP || (trustedScript
  2908.         // eslint-disable-next-line no-eval
  2909.         ? window.eval(trustedScript(`(function anonymous(${args.slice(0, -1).join(',')}){${args.slice(-1)[0]}})`))
  2910.         : new Function(...args)
  2911.       );
  2912.     } catch (e) {
  2913.       if (!RX_EVAL_BLOCKED.test(e.message))
  2914.         throw e;
  2915.       App.NOP = () => {};
  2916.       return App.NOP;
  2917.     }
  2918.   },
  2919.  
  2920.   rel2abs(rel, abs = location.href) {
  2921.     try {
  2922.       return /^(data:|blob:|[-\w]+:\/\/)/.test(rel) ? rel :
  2923.         new URL(rel, abs).href;
  2924.     } catch (e) {
  2925.       return rel;
  2926.     }
  2927.   },
  2928.  
  2929.   stringify(...args) {
  2930.     const p = Array.prototype;
  2931.     const {toJSON} = p;
  2932.     if (toJSON) p.toJSON = null;
  2933.     const res = JSON.stringify(...args);
  2934.     if (toJSON) p.toJSON = toJSON;
  2935.     return res;
  2936.   },
  2937.  
  2938.   suppressTooltip() {
  2939.     for (const node of [
  2940.       ai.node.parentNode,
  2941.       ai.node,
  2942.       ai.node.firstElementChild,
  2943.     ]) {
  2944.       const t = (node || 0).title;
  2945.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2946.         ai.tooltip = {node, text: t};
  2947.         node.title = '';
  2948.         break;
  2949.       }
  2950.     }
  2951.   },
  2952.  
  2953.   tabFixUrl() {
  2954.     const {tabfix = App.tabfix} = ai.rule;
  2955.     return tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2956.            flattenHtml(`data:text/html;charset=utf8,
  2957.       <style>
  2958.         body {
  2959.           margin: 0;
  2960.           padding: 0;
  2961.           background: #222;
  2962.         }
  2963.         .fit {
  2964.           overflow: hidden
  2965.         }
  2966.         .fit > img {
  2967.           max-width: 100vw;
  2968.           max-height: 100vh;
  2969.         }
  2970.         body > img {
  2971.           margin: auto;
  2972.           position: absolute;
  2973.           left: 0;
  2974.           right: 0;
  2975.           top: 0;
  2976.           bottom: 0;
  2977.         }
  2978.       </style>
  2979.       <body class=fit>
  2980.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2981.       </body>
  2982.     `).replace(/\x20?([:>])\x20/g, '$1').replace(/#/g, '%23');
  2983.   },
  2984. };
  2985.  
  2986. async function setup({rule} = {}) {
  2987.   if (!isFunction(doc.body.attachShadow)) {
  2988.     alert('Cannot show MPIV config dialog: the browser is probably too old.\n' +
  2989.           'You can edit the script\'s storage directly in your userscript manager.');
  2990.     return;
  2991.   }
  2992.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2993.   let uiCfg;
  2994.   let root = (elSetup || 0).shadowRoot;
  2995.   let {blankRuleElement} = setup;
  2996.   let mover, moveX = 0, moveY = 0, moveBaseX = 0, moveBaseY = 0;
  2997.   /** @type {{[id:string]: HTMLElement}} */
  2998.   const UI = setup.UI = new Proxy({}, {
  2999.     get(_, id) {
  3000.       return root.getElementById(id);
  3001.     },
  3002.   });
  3003.   if (!elSetup)
  3004.     build();
  3005.   if (elSetup.parentElement !== doc.body) {
  3006.     init(await Config.load({save: true}));
  3007.     doc.body.append(elSetup);
  3008.   }
  3009.   if (rule)
  3010.     installRule(rule);
  3011.  
  3012.   function build() {
  3013.     elSetup = $new('div', {contentEditable: true});
  3014.     root = elSetup.attachShadow({mode: 'open'});
  3015.     root.append(...createSetupElement());
  3016.     initEvents();
  3017.   }
  3018.  
  3019.   function init(data) {
  3020.     uiCfg = data;
  3021.     renderAll();
  3022.     renderVolatiles();
  3023.     renderRules();
  3024.     requestAnimationFrame(() => {
  3025.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elSetup.clientHeight / 4) + 'px';
  3026.     });
  3027.   }
  3028.  
  3029.   function initEvents() {
  3030.     UI._mover.onmousedown = e => {
  3031.       if (e.button || eventModifiers(e))
  3032.         return;
  3033.       if (!mover) {
  3034.         mover = UI._cssSetup.sheet;
  3035.         mover.insertRule(':host {}');
  3036.         mover = mover.cssRules[1];
  3037.       }
  3038.       addEventListener('mousemove', onMove, true);
  3039.       addEventListener('mouseup', onMoveDone, true);
  3040.       addEventListener('keydown', onMoveKey, true);
  3041.       moveX = e.x - moveBaseX;
  3042.       moveY = e.y - moveBaseY;
  3043.       $css(mover, {opacity: .75});
  3044.     };
  3045.     UI._apply.onclick = UI._cancel.onclick = UI._ok.onclick = UI._x.onclick = closeSetup;
  3046.     UI._export.onclick = e => {
  3047.       dropEvent(e);
  3048.       GM.setClipboard(Util.stringify(collectConfig(), null, '  '));
  3049.       UI._exportNotification.hidden = false;
  3050.       setTimeout(() => (UI._exportNotification.hidden = true), 1000);
  3051.     };
  3052.     UI._import.onclick = e => {
  3053.       dropEvent(e);
  3054.       const s = prompt('Paste settings:');
  3055.       if (s)
  3056.         init(new Config({data: s}));
  3057.     };
  3058.     UI._install.onclick = setupRuleInstaller;
  3059.     const /** @type {HTMLTextAreaElement} */ cssApp = UI._cssApp;
  3060.     UI._reveal.onclick = e => {
  3061.       e.preventDefault();
  3062.       cssApp.hidden = !cssApp.hidden;
  3063.       if (!cssApp.hidden) {
  3064.         if (!cssApp.value) {
  3065.           App.updateStyles();
  3066.           cssApp.value = App.globalStyle.trim();
  3067.           cssApp.setSelectionRange(0, 0);
  3068.         }
  3069.         cssApp.focus();
  3070.       }
  3071.     };
  3072.     UI.start.onchange = function () {
  3073.       UI[PREFIX + 'setup'].dataset.start = this.value;
  3074.     };
  3075.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  3076.     // color
  3077.     for (const el of $$('[type="color"]', root)) {
  3078.       el.oninput = colorOnInput;
  3079.       el.elSwatch = el.nextElementSibling;
  3080.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  3081.       el.elOpacity.elColor = el;
  3082.     }
  3083.     function onMove({x, y}) {
  3084.       x = moveBaseX = clamp(x - moveX, -innerWidth + CSS_SETUP_X * 4, elSetup.clientWidth - CSS_SETUP_X);
  3085.       y = moveBaseY = clamp(y - moveY, 0, innerHeight - CSS_SETUP_X * 3);
  3086.       $css(mover, {transform: `translate(${x}px, ${y}px)`});
  3087.       UI._ul.style.maxHeight = `calc(100vh - ${CSS_SETUP_MAX_Y + y - CSS_SETUP_X}px)`;
  3088.     }
  3089.     function onMoveDone() {
  3090.       removeEventListener('mousemove', onMove, true);
  3091.       removeEventListener('mouseup', onMoveDone, true);
  3092.       removeEventListener('keydown', onMoveKey, true);
  3093.       $css(mover, {opacity: ''});
  3094.     }
  3095.     function onMoveKey(e) {
  3096.       if (e.key === 'Escape' && !eventModifiers(e)) {
  3097.         e.stopPropagation();
  3098.         onMove({x: moveX, y: moveY});
  3099.         onMoveDone();
  3100.       }
  3101.     }
  3102.     function colorOnInput() {
  3103.       this.elSwatch.style.setProperty('--color',
  3104.         Util.color(this.value, this.elOpacity.valueAsNumber));
  3105.     }
  3106.     // range
  3107.     for (const el of $$('[type="range"]', root)) {
  3108.       el.oninput = rangeOnInput;
  3109.       el.onblur = rangeOnBlur;
  3110.       el.addEventListener('focusin', rangeOnFocus);
  3111.     }
  3112.     function rangeOnBlur(e) {
  3113.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  3114.         this.elEdit.onblur(e);
  3115.     }
  3116.     function rangeOnFocus() {
  3117.       if (this.elEdit) return;
  3118.       const {min, max, step, value} = this;
  3119.       this.elEdit = $new('input', {
  3120.         value, min, max, step,
  3121.         className: 'range-edit',
  3122.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  3123.         type: 'number',
  3124.         elRange: this,
  3125.         onblur: rangeEditOnBlur,
  3126.         oninput: rangeEditOnInput,
  3127.       });
  3128.       this.insertAdjacentElement('afterend', this.elEdit);
  3129.     }
  3130.     function rangeOnInput() {
  3131.       this.title = (this.dataset.title || '').replace('$', this.value);
  3132.       if (this.elColor) this.elColor.oninput();
  3133.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  3134.     }
  3135.     // range-edit
  3136.     function rangeEditOnBlur(e) {
  3137.       if (e.relatedTarget !== this.elRange) {
  3138.         this.remove();
  3139.         this.elRange.elEdit = null;
  3140.       }
  3141.     }
  3142.     function rangeEditOnInput() {
  3143.       this.elRange.valueAsNumber = this.valueAsNumber;
  3144.       this.elRange.oninput();
  3145.     }
  3146.     // prevent the main page from interpreting key presses in inputs as hotkeys
  3147.     // which may happen since it sees only the outer <div> in the event |target|
  3148.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  3149.   }
  3150.  
  3151.   function closeSetup(event) {
  3152.     const isApply = this.id === '_apply';
  3153.     if (event && (this.id === '_ok' || isApply)) {
  3154.       cfg = uiCfg = collectConfig({save: true, clone: isApply});
  3155.       Ruler.init();
  3156.       Menu.reRegisterAlt();
  3157.       if (isApply)
  3158.         return renderVolatiles();
  3159.     }
  3160.     $remove(elSetup);
  3161.     elSetup = null;
  3162.   }
  3163.  
  3164.   function collectConfig({save, clone} = {}) {
  3165.     let data = {};
  3166.     for (const el of $$('input[id], select[id]', root))
  3167.       data[el.id] = el.type === 'checkbox' ? el.checked :
  3168.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  3169.           el.value || '';
  3170.     Object.assign(data, {
  3171.       css: UI.css.value.trim(),
  3172.       delay: UI.delay.valueAsNumber * 1000,
  3173.       hosts: collectRules(),
  3174.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  3175.       scales: UI.scales.value
  3176.         .trim()
  3177.         .split(/[,;]*\s+/)
  3178.         .map(x => x.replace(',', '.'))
  3179.         .filter(x => !isNaN(parseFloat(x))),
  3180.     });
  3181.     if (clone)
  3182.       data = JSON.parse(Util.stringify(data));
  3183.     return new Config({data, save});
  3184.   }
  3185.  
  3186.   function collectRules() {
  3187.     return [...UI._rules.children]
  3188.       .map(el => [el.value.trim(), el[RULE]])
  3189.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  3190.       .map(([s, json]) => json || s)
  3191.       .filter(Boolean);
  3192.   }
  3193.  
  3194.   function checkRule({target: el}) {
  3195.     let json, error, title;
  3196.     const prev = el.previousElementSibling;
  3197.     if (el.value) {
  3198.       json = Ruler.parse(el.value);
  3199.       error = json instanceof Error && (json.message || String(json));
  3200.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  3201.         !/^[-.a-z0-9]*$/i.test(json.d);
  3202.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  3203.         .filter(Boolean).join('\n');
  3204.       el.classList.toggle('invalid-domain', invalidDomain);
  3205.       el.classList.toggle('matching-domain', !!json.d && hostname.includes(json.d));
  3206.       if (!prev)
  3207.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3208.     } else if (prev) {
  3209.       prev.focus();
  3210.       el.remove();
  3211.     }
  3212.     el[RULE] = !error && json;
  3213.     el.title = title;
  3214.     el.setCustomValidity(error || '');
  3215.   }
  3216.  
  3217.   async function focusRule({target: el, relatedTarget: from}) {
  3218.     if (el === this)
  3219.       return;
  3220.     await new Promise(setTimeout);
  3221.     if (el[RULE] && el.rows < 2) {
  3222.       let i = el.selectionStart;
  3223.       const txt = el.value = Ruler.format(el[RULE], {expand: true});
  3224.       i += txt.slice(0, i).match(/^\s*/gm).reduce((len, s) => len + s.length, 0);
  3225.       el.setSelectionRange(i, i);
  3226.       el.rows = txt.match(/^/gm).length;
  3227.     }
  3228.     if (!this.contains(from))
  3229.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  3230.   }
  3231.  
  3232.   function installRule(rule) {
  3233.     const inputs = UI._rules.children;
  3234.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  3235.     if (!el) {
  3236.       el = inputs[0];
  3237.       el[RULE] = rule;
  3238.       el.value = Ruler.format(rule);
  3239.       el.hidden = false;
  3240.       const i = Math.max(0, collectRules().indexOf(rule));
  3241.       inputs[i].insertAdjacentElement('afterend', el);
  3242.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  3243.     }
  3244.     const rect = el.getBoundingClientRect();
  3245.     if (rect.bottom < 0 ||
  3246.         rect.bottom > el.parentNode.offsetHeight)
  3247.       el.scrollIntoView();
  3248.     el.classList.add('highlight');
  3249.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  3250.     el.focus();
  3251.   }
  3252.  
  3253.   function renderRules() {
  3254.     const rules = UI._rules;
  3255.     rules.addEventListener('input', checkRule);
  3256.     rules.addEventListener('focusin', focusRule);
  3257.     rules.addEventListener('paste', focusRule);
  3258.     blankRuleElement =
  3259.       setup.blankRuleElement =
  3260.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  3261.     if (blankRuleElement.nextElementSibling) {
  3262.       rules.textContent = '';
  3263.       rules.appendChild(blankRuleElement.cloneNode());
  3264.     }
  3265.     for (const rule of uiCfg.hosts || []) {
  3266.       const el = blankRuleElement.cloneNode();
  3267.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  3268.       rules.appendChild(el);
  3269.       checkRule({target: el});
  3270.     }
  3271.     const search = UI._search;
  3272.     search.oninput = () => {
  3273.       setup.search = search.value;
  3274.       const s = search.value.toLowerCase();
  3275.       for (const el of rules.children)
  3276.         el.hidden = s && !el.value.toLowerCase().includes(s);
  3277.     };
  3278.     search.value = setup.search || '';
  3279.     if (search.value)
  3280.       search.oninput();
  3281.   }
  3282.  
  3283.   function renderVolatiles() {
  3284.     UI.scales.value = uiCfg.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  3285.     UI._css.textContent = cfg._getCss();
  3286.   }
  3287.  
  3288.   function renderAll() {
  3289.     for (const el of $$('input[id], select[id], textarea[id]', root))
  3290.       if (el.id in uiCfg)
  3291.         el[el.type === 'checkbox' ? 'checked' : 'value'] = uiCfg[el.id];
  3292.     for (const el of $$('input[type="range"]', root))
  3293.       el.oninput();
  3294.     for (const el of $$('a[href^="http"]', root))
  3295.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  3296.     UI.delay.valueAsNumber = uiCfg.delay / 1000;
  3297.     UI.scale.valueAsNumber = Math.round(clamp(uiCfg.scale - 1, 0, 1) * 100);
  3298.     UI.start.onchange();
  3299.   }
  3300. }
  3301.  
  3302. function setupClickedRule(event) {
  3303.   let rule;
  3304.   const el = event.target.closest('blockquote, code, pre');
  3305.   if (el && !event.button && !eventModifiers(event) && (rule = Ruler.fromElement(el))) {
  3306.     dropEvent(event);
  3307.     setup({rule});
  3308.   }
  3309. }
  3310.  
  3311. /** @this {HTMLButtonElement} */
  3312. async function setupRuleInstaller(e) {
  3313.   dropEvent(e);
  3314.   const parent = setup.UI._rules2;
  3315.   this.disabled = true;
  3316.   this.textContent = 'Loading...';
  3317.   let rules;
  3318.  
  3319.   try {
  3320.     rules = extractRules(await Req.getDoc(this.parentElement.href));
  3321.     this.textContent = 'Rules loaded.';
  3322.     const el = $new('select', {
  3323.       size: 8,
  3324.       style: 'width: 100%',
  3325.       ondblclick: e => e.target !== el && maybeSetup(e),
  3326.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  3327.     }, rules.map(renderRule));
  3328.     const i = el.selectedIndex = findMatchingRuleIndex();
  3329.     parent.append(
  3330.       $new('div#_installHint', [
  3331.         'Double-click the rule (or select and press Enter) to add it. ',
  3332.         'Click ', $new('code', 'Apply'), ' or ', $new('code', 'OK'), ' to confirm.',
  3333.       ]),
  3334.       el
  3335.     );
  3336.     if (i) requestAnimationFrame(() => {
  3337.       const optY = el.selectedOptions[0].offsetTop - el.offsetTop;
  3338.       el.scrollTo(0, optY - el.offsetHeight / 2);
  3339.     });
  3340.     el.focus();
  3341.   } catch (e) {
  3342.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  3343.   }
  3344.  
  3345.   function extractRules({doc}) {
  3346.     // sort by name
  3347.     return [...$$('#wiki-body tr', doc)]
  3348.       .map(tr => [
  3349.         tr.cells[0].textContent.trim(),
  3350.         Ruler.fromElement(tr.cells[1]),
  3351.       ])
  3352.       .filter(([name, r]) =>
  3353.         name && r && (!r.d || hostname.includes(r.d)))
  3354.       .sort(([a], [b]) =>
  3355.         (a = a.toLowerCase()) < (b = b.toLowerCase()) ? -1 :
  3356.           a > b ? 1 :
  3357.             0);
  3358.   }
  3359.  
  3360.   function findMatchingRuleIndex() {
  3361.     const dottedHost = `.${hostname}.`;
  3362.     let maxCount = 0, maxIndex = 0, index = 0;
  3363.     for (const [name, {d}] of rules) {
  3364.       let count = !!(d && hostname.includes(d)) * 10;
  3365.       for (const part of name.toLowerCase().split(/[^a-z\d.-]+/i))
  3366.         count += dottedHost.includes(`.${part}.`) && part.length;
  3367.       if (count > maxCount) {
  3368.         maxCount = count;
  3369.         maxIndex = index;
  3370.       }
  3371.       index++;
  3372.     }
  3373.     return maxIndex;
  3374.   }
  3375.  
  3376.   function renderRule([name, rule]) {
  3377.     return $new('option', {
  3378.       textContent: name,
  3379.       title: Ruler.format(rule, {expand: true})
  3380.         .replace(/^{|\s*}$/g, '')
  3381.         .split('\n')
  3382.         .slice(0, 12)
  3383.         .map(renderTitleLine)
  3384.         .filter(Boolean)
  3385.         .join('\n'),
  3386.     });
  3387.   }
  3388.  
  3389.   function renderTitleLine(line, i, arr) {
  3390.     return (
  3391.       // show ... on 10th line if there are more lines
  3392.       i === 9 && arr.length > 10 ? '...' :
  3393.         i > 10 ? '' :
  3394.           // truncate to 100 chars
  3395.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  3396.             // strip the leading space
  3397.             .replace(/^\s/, ''));
  3398.   }
  3399.  
  3400.   function maybeSetup(e) {
  3401.     if (!eventModifiers(e))
  3402.       setup({rule: rules[e.currentTarget.selectedIndex][1]});
  3403.   }
  3404. }
  3405.  
  3406. const CSS_SETUP_X = 20;
  3407. const CSS_SETUP_MAX_Y = 200;
  3408. const CSS_SETUP = /*language=css*/ `
  3409.   :host {
  3410.     all: initial !important;
  3411.     position: fixed !important;
  3412.     z-index: 2147483647 !important;
  3413.     top: ${CSS_SETUP_X}px !important;
  3414.     right: 20px !important;
  3415.     padding: 1.5em !important;
  3416.     color: #000 !important;
  3417.     --bg: #eee;
  3418.     background: var(--bg) !important;
  3419.     box-shadow: 5px 5px 25px 2px #000 !important;
  3420.     width: 33em !important;
  3421.     border: 1px solid black !important;
  3422.     display: flex !important;
  3423.     flex-direction: column !important;
  3424.   }
  3425.   main {
  3426.     font: 12px/15px sans-serif;
  3427.   }
  3428.   main:not([data-start=auto]) [data-start-auto] {
  3429.     opacity: .5;
  3430.   }
  3431.   table {
  3432.     text-align:left;
  3433.   }
  3434.   ul {
  3435.     min-height: 430px;
  3436.     max-height: calc(100vh - ${CSS_SETUP_MAX_Y}px);
  3437.     margin: 0 0 15px 0;
  3438.     padding: 0;
  3439.     list-style: none;
  3440.   }
  3441.   li {
  3442.     margin: 0;
  3443.     padding: .25em 0;
  3444.   }
  3445.   li.options {
  3446.     display: flex;
  3447.     align-items: center;
  3448.     justify-content: space-between;
  3449.   }
  3450.   li.row {
  3451.     align-items: start;
  3452.     flex-wrap: wrap;
  3453.   }
  3454.   li.row label {
  3455.     display: flex;
  3456.     flex-direction: row;
  3457.     align-items: center;
  3458.   }
  3459.   li.row input {
  3460.     margin-right: .25em;
  3461.   }
  3462.   li.stretch label {
  3463.     flex: 1;
  3464.     white-space: nowrap;
  3465.   }
  3466.   li.stretch label > span {
  3467.     display: flex;
  3468.     flex-direction: row;
  3469.     flex: 1;
  3470.   }
  3471.   label {
  3472.     display: inline-flex;
  3473.     flex-direction: column;
  3474.   }
  3475.   label:not(:last-child) {
  3476.     margin-right: 1em;
  3477.   }
  3478.   input, select {
  3479.     min-height: 1.3em;
  3480.     box-sizing: border-box;
  3481.   }
  3482.   input[type=checkbox] {
  3483.     margin-left: 0;
  3484.   }
  3485.   input[type=number] {
  3486.     width: 4em;
  3487.   }
  3488.   input:not([type=checkbox])  {
  3489.     padding: 0 .25em;
  3490.   }
  3491.   input[type=range] {
  3492.     flex: 1;
  3493.     width: 100%;
  3494.     margin: 0 .25em;
  3495.     padding: 0;
  3496.     filter: saturate(0);
  3497.     opacity: .5;
  3498.   }
  3499.   u + input[type=range] {
  3500.     max-width: 3em;
  3501.   }
  3502.   input[type=range]:hover {
  3503.     filter: none;
  3504.     opacity: 1;
  3505.   }
  3506.   input[type=color] {
  3507.     position: absolute;
  3508.     width: calc(1.5em + 2px);
  3509.     opacity: 0;
  3510.     cursor: pointer;
  3511.   }
  3512.   u {
  3513.     position: relative;
  3514.     flex: 0 0 1.5em;
  3515.     height: 1.5em;
  3516.     border: 1px solid #888;
  3517.     pointer-events: none;
  3518.     color: #888;
  3519.     background-image:
  3520.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  3521.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  3522.     background-size: .5em .5em;
  3523.     background-position: 0 0, .25em .25em;
  3524.   }
  3525.   u::after {
  3526.     position: absolute;
  3527.     top: 0;
  3528.     left: 0;
  3529.     right: 0;
  3530.     bottom: 0;
  3531.     content: "";
  3532.     background-color: var(--color);
  3533.   }
  3534.   .range-edit {
  3535.     position: absolute;
  3536.     box-shadow: 0 0.25em 1em #000;
  3537.     z-index: 99;
  3538.   }
  3539.   textarea {
  3540.     resize: vertical;
  3541.     margin: 1px 0;
  3542.     font: 11px/1.25 Consolas, monospace;
  3543.   }
  3544.   :invalid {
  3545.     background-color: #f002;
  3546.     border-color: #800;
  3547.   }
  3548.   code {
  3549.     font-weight: bold;
  3550.   }
  3551.   a {
  3552.     text-decoration: none;
  3553.     color: LinkText;
  3554.     cursor: pointer;
  3555.   }
  3556.   a:hover {
  3557.     text-decoration: underline;
  3558.   }
  3559.   button {
  3560.     padding: .2em .5em;
  3561.     margin-right: 1em;
  3562.   }
  3563.   kbd {
  3564.     padding: 1px 6px;
  3565.     font-weight: bold;
  3566.     font-family: Consolas, monospace;
  3567.     border: 1px solid #888;
  3568.     border-radius: 3px;
  3569.     box-shadow: inset 1px 1px 5px #8888, .25px .5px 2px #0008;
  3570.   }
  3571.   .column {
  3572.     display: flex;
  3573.     flex-direction: column;
  3574.   }
  3575.   .flex {
  3576.     display: flex;
  3577.   }
  3578.   .highlight {
  3579.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  3580.     animation-fill-mode: both;
  3581.   }
  3582.   #_rules > * {
  3583.     word-break: break-all;
  3584.   }
  3585.   #_rules > :not(:focus) {
  3586.     overflow: hidden; /* prevents wrapping in FF */
  3587.   }
  3588.   .invalid-domain {
  3589.     opacity: .5;
  3590.   }
  3591.   .matching-domain {
  3592.     border-color: #56b8ff;
  3593.     background: #d7eaff;
  3594.   }
  3595.   #_mover {
  3596.     cursor: move;
  3597.     user-select: none;
  3598.     position: absolute;
  3599.     top: 0;
  3600.     left: 8px;
  3601.     right: 24px;
  3602.     height: 24px;
  3603.     text-align: center;
  3604.     background: linear-gradient(transparent 10px, currentColor 10px, currentColor 11px, transparent 11px,
  3605.       transparent 13px, currentColor 13px, currentColor 14px, transparent 14px);
  3606.   }
  3607.   #_mover::after {
  3608.     content: 'MPIV ${GM.info.script.version}';
  3609.     font: bold 20px/1.3 sans;
  3610.     background: var(--bg);
  3611.     padding: 0 1ex;
  3612.   }
  3613.   #_x {
  3614.     position: absolute;
  3615.     top: 0;
  3616.     right: 0;
  3617.     padding: 4px 8px;
  3618.     cursor: pointer;
  3619.     user-select: none;
  3620.   }
  3621.   #_x:hover {
  3622.     background-color: #8884;
  3623.   }
  3624.   #_cssApp {
  3625.     color: seagreen;
  3626.   }
  3627.   #_exportNotification {
  3628.     color: green;
  3629.     font-weight: bold;
  3630.     position: absolute;
  3631.     bottom: 4px;
  3632.     right: 26px;
  3633.   }
  3634.   #_installHint {
  3635.     color: green;
  3636.   }
  3637.   #_usage {
  3638.     display: flex;
  3639.     flex-wrap: wrap;
  3640.     align-items: flex-start;
  3641.     gap: 1em;
  3642.   }
  3643.   #_usage th {
  3644.     font-weight: normal;
  3645.     padding-right: .5em;
  3646.   }
  3647.   #_usage tr:nth-last-child(n + 2) > :not(br) {
  3648.     white-space: pre-line;
  3649.     border-bottom: 1px dotted #8888;
  3650.   }
  3651.   #_usage kbd {
  3652.     font-family: monospace;
  3653.     font-weight: bold;
  3654.   }
  3655.   @keyframes fade-in {
  3656.     from { background-color: deepskyblue }
  3657.     to {}
  3658.   }
  3659.   @media (prefers-color-scheme: dark) {
  3660.     :host {
  3661.       color: #aaa !important;
  3662.       --bg: #333 !important;
  3663.     }
  3664.     a {
  3665.       color: deepskyblue;
  3666.     }
  3667.     button {
  3668.       background: linear-gradient(-5deg, #333, #555);
  3669.       border: 1px solid #000;
  3670.       box-shadow: 0 2px 6px #181818;
  3671.       border-radius: 3px;
  3672.       cursor: pointer;
  3673.     }
  3674.     button:hover {
  3675.       background: linear-gradient(-5deg, #333, #666);
  3676.     }
  3677.     textarea, input, select {
  3678.       background: #111;
  3679.       color: #BBB;
  3680.       border: 1px solid #555;
  3681.     }
  3682.     input[type=checkbox] {
  3683.       filter: invert(1);
  3684.     }
  3685.     input[type=range] {
  3686.       filter: invert(1) saturate(0);
  3687.     }
  3688.     input[type=range]:hover {
  3689.       filter: invert(1);
  3690.     }
  3691.     kbd {
  3692.       border-color: #666;
  3693.     }
  3694.     @supports (-moz-appearance: none) {
  3695.       input[type=checkbox],
  3696.       input[type=range],
  3697.       input[type=range]:hover {
  3698.         filter: none;
  3699.       }
  3700.     }
  3701.     .range-edit {
  3702.       box-shadow: 0 .5em 1em .5em #000;
  3703.     }
  3704.     .matching-domain {
  3705.       border-color: #0065af;
  3706.       background: #032b58;
  3707.       color: #ddd;
  3708.     }
  3709.     #_cssApp {
  3710.       color: darkseagreen;
  3711.     }
  3712.     #_installHint {
  3713.       color: greenyellow;
  3714.     }
  3715.     ::-webkit-scrollbar {
  3716.       width: 14px;
  3717.       height: 14px;
  3718.       background: #333;
  3719.     }
  3720.     ::-webkit-scrollbar-button:single-button {
  3721.       background: radial-gradient(circle at center, #555 40%, #333 40%)
  3722.     }
  3723.     ::-webkit-scrollbar-track-piece {
  3724.       background: #444;
  3725.       border: 4px solid #333;
  3726.       border-radius: 8px;
  3727.     }
  3728.     ::-webkit-scrollbar-thumb {
  3729.       border: 3px solid #333;
  3730.       border-radius: 8px;
  3731.       background: #666;
  3732.     }
  3733.     ::-webkit-resizer {
  3734.       background: #111 linear-gradient(-45deg, transparent 3px, #888 3px, #888 4px, transparent 4px, transparent 6px, #888 6px, #888 7px, transparent 7px) no-repeat;
  3735.       border: 2px solid transparent;
  3736.     }
  3737.   }
  3738. `;
  3739.  
  3740. function createSetupElement() {
  3741.   const MPIV_BASE_URL = 'https://github.com/tophf/mpiv/wiki/';
  3742.   const scalesHint = 'Leave it empty and click Apply or OK to restore the default values.';
  3743.   const $newLink = (text, href, props) =>
  3744.     $new('a', Object.assign({target: '_blank'}, href && {href}, props), text);
  3745.   const $newCheck = (label, id, title = '', props) =>
  3746.     $new('label', Object.assign({title}, props), [
  3747.       $new('input', {id, type: 'checkbox'}),
  3748.       label,
  3749.     ]);
  3750.   const $newKbd = s => s[0] === '{' ? $new('kbd', s.slice(1, -1)) : s;
  3751.   const $newRange = (id, title = '', min = 0, max = 100, step = 1, type = 'range') =>
  3752.     $new('input', {id, min, max, step, type, 'data-title': title});
  3753.   const $newSelect = (label, id, values) =>
  3754.     $new('label', [
  3755.       label,
  3756.       $new('select', {id}, Object.entries(values).map(([k, v]) =>
  3757.         $new('option', Object.assign({value: k}, typeof v === 'object' ? v : {textContent: v})))),
  3758.     ]);
  3759.   const $newTR = ([name, val]) =>
  3760.     $new('tr', !name ? $new('br') : [
  3761.       $new('th', ((name = name.split(/(\n)/))[0] = $new('b', name[0])) && name),
  3762.       $new('td', val.split(/({.+?})/).map($newKbd)),
  3763.     ]);
  3764.   const kAutoTooltip = '...when the "popup shows" option is "automatically"';
  3765.   const kAutoProps = {'data-start-auto': ''};
  3766.   return [
  3767.     $new('style#_cssSetup', CSS_SETUP),
  3768.     $new('style#_css'),
  3769.     $new(`main#${PREFIX}setup`, [
  3770.       $new('#_mover'),
  3771.       $new('#_x', 'x'),
  3772.       $new('ul#_ul.column', [
  3773.         $new('details', {style: 'order:1; padding-top: .5em;'}, [
  3774.           $new('summary', {style: 'cursor: pointer'},
  3775.             $new('b', 'Help & hotkeys...')),
  3776.           $new('#_usage', [
  3777.             $new('table', [
  3778.               ['Activate', 'hover the target'],
  3779.               ['Deactivate', 'move cursor off target, or click, or zoom out fully'],
  3780.               ['Ignore target', 'hold {Shift} ⏵ hover the target ⏵ release the key'],
  3781.               ['Freeze popup', 'hold {Shift} ⏵ leave the target ⏵ release the key'],
  3782.               ['Force-activate\n(videos or small pics)', 'hold {Ctrl} ⏵ hover the target ⏵ release the key'],
  3783.             ].map($newTR)),
  3784.             $new('table', [
  3785.               ['Start zooming', 'configurable (automatic or via right-click)\nor tap {Shift} while popup is visible'],
  3786.               ['Zoom', 'mouse wheel'],
  3787.               [],
  3788.               ['Rotate', '{L} {r} for "left" or "right"'],
  3789.               ['Flip/mirror', '{h} {v} for "horizontal" or "vertical"'],
  3790.               ['Previous/next\n(in album)', 'mouse wheel, {j} {k} or {←} {→} keys'],
  3791.             ].map($newTR)),
  3792.             $new('table', [
  3793.               ['Antialiasing', '{a}'],
  3794.               ['Caption in info', '{c}'],
  3795.               ['Download', '{d}'],
  3796.               ['Fullscreen', '{f}'],
  3797.               ['Info', '{i}'],
  3798.               ['Mute', '{m}'],
  3799.               ['Night mode', '{n}'],
  3800.               ['Open in tab', '{t}'],
  3801.             ].map($newTR)),
  3802.           ]),
  3803.         ]),
  3804.         $new('li.options.stretch', [
  3805.           $newSelect('Popup shows on', 'start', {
  3806.             context: 'Right-click / \u2261 / Ctrl',
  3807.             contextMK: 'Right-click / \u2261',
  3808.             contextM: 'Right-click',
  3809.             contextK: {
  3810.               textContent: '\u2261 key',
  3811.               title: '\u2261 is the Menu key (near the right Ctrl)',
  3812.             },
  3813.             ctrl: 'Ctrl',
  3814.             auto: 'automatically',
  3815.           }),
  3816.           $new('label', {title: kAutoTooltip, ...kAutoProps},
  3817.             ['after, sec', $newRange('delay', 'seconds', .05, 10, .05, 'number')]),
  3818.           $new('label', {title: '(if the full version of the hovered image is ...% larger)'},
  3819.             ['if larger, %', $newRange('scale', null, 0, 100, 1, 'number')]),
  3820.           $newSelect('Zoom activates on', 'zoom', {
  3821.             context: 'Right click / Shift',
  3822.             wheel: 'Wheel up / Shift',
  3823.             shift: 'Shift',
  3824.             auto: 'automatically',
  3825.           }),
  3826.           $newSelect('...and zooms to', 'fit', {
  3827.             'all': 'fit to window',
  3828.             'large': 'fit if larger',
  3829.             'no': '100%',
  3830.             '': {textContent: 'custom', title: 'Use custom scale factors'},
  3831.           }),
  3832.         ]),
  3833.         $new('li.options', [
  3834.           $new('label', ['Zoom step, %', $newRange('zoomStep', null, 100, 400, 1, 'number')]),
  3835.           $newSelect('When fully zoomed out:', 'zoomOut', {
  3836.             stay: 'stay in zoom mode',
  3837.             auto: 'stay if still hovered',
  3838.             unzoom: 'undo zoom mode',
  3839.             close: 'close popup',
  3840.           }),
  3841.           $new('label', {
  3842.             style: 'flex: 1',
  3843.             title: `
  3844.               Scale factors to use when “zooms to” selector is set to “custom”.
  3845.               0 = fit to window,
  3846.               0! = same as 0 but also removes smaller values,
  3847.               * after a value marks the default zoom factor, for example: 1*
  3848.               The popup won't shrink below the image's natural size or window size for bigger mages.
  3849.               ${scalesHint}
  3850.             `.trim().replace(/\n\s+/g, '\r'),
  3851.           }, ['Custom scale factors:', $new('input#scales', {placeholder: scalesHint})]),
  3852.         ]),
  3853.         $new('li.options.row', [
  3854.           $new([
  3855.             $newCheck('Centered*', 'center',
  3856.               '...or try to keep the original link/thumbnail unobscured by the popup'),
  3857.             $newCheck('Preload on hover*', 'preload',
  3858.               'Provides smoother experience but increases network traffic'),
  3859.             $newCheck('Require Ctrl key for video*', 'videoCtrl', kAutoTooltip, kAutoProps),
  3860.             $newCheck('Mute videos*', 'mute', 'Hotkey: "m" in the popup'),
  3861.             $newCheck('Keep playing video*', 'keepVids',
  3862.               '...until you press Esc key or click elsewhere'),
  3863.             $newCheck('Keep preview on blur*', 'keepOnBlur',
  3864.               'i.e. when mouse pointer moves outside the page'),
  3865.           ]),
  3866.           $new([
  3867.             $newCheck('Show complete image*', 'waitLoad',
  3868.               '...or immediately show a partial image while still loading'),
  3869.             $newCheck('Shadow only when complete*', 'uiShadowOnLoad',
  3870.               '...to avoid showing the semi-transparent background while still loading from a slow site'),
  3871.             $new('div.flex', {style: 'align-items:center'}, [
  3872.               $newCheck('Info: show for', 'uiInfo', 'Hotkey: "i" (or hold "Shift") in the popup'),
  3873.               $new('input#uiInfoHide', {min: 1, step: 'any', type: 'number'}),
  3874.               'sec',
  3875.             ]),
  3876.             $newCheck('Info: only once*', 'uiInfoOnce', '...or every time the info changes'),
  3877.             $newCheck('Info: caption*', 'uiInfoCaption', 'Hotkey: "c" in the popup'),
  3878.             $newCheck('Fade-in transition', 'uiFadein'),
  3879.             $newCheck('Fade-in transition in gallery', 'uiFadeinGallery'),
  3880.           ]),
  3881.           $new([
  3882.             $newCheck('Night mode*', 'night', 'Hotkey: "n" in the popup'),
  3883.             $newCheck('Run in image tabs', 'imgtab'),
  3884.             $newCheck('Spoof hotlinking*', 'xhr',
  3885.               'Disable only if you spoof the HTTP headers yourself'),
  3886.             $newCheck('Set status on <html>*', 'globalStatus',
  3887.               "Causes slowdowns so don't enable unless you explicitly use it in your custom CSS"),
  3888.             $newCheck('Auto-start switch in menu*', 'startAltShown',
  3889.               "Show a switch for 'auto-start' mode in userscript manager menu"),
  3890.           ]),
  3891.         ]),
  3892.         $new('li.options.stretch', [
  3893.           $new('label', [
  3894.             'Background',
  3895.             $new('span', [
  3896.               $new('input#uiBackgroundColor', {type: 'color'}), $new('u'),
  3897.               $newRange('uiBackgroundOpacity', 'Opacity: $%'),
  3898.             ]),
  3899.           ]),
  3900.           $new('label', [
  3901.             'Border color, opacity, size',
  3902.             $new('span', [
  3903.               $new('input#uiBorderColor', {type: 'color'}), $new('u'),
  3904.               $newRange('uiBorderOpacity', 'Opacity: $%'),
  3905.               $newRange('uiBorder', 'Border size: $px', 0, 20),
  3906.             ]),
  3907.           ]),
  3908.           $new('label', [
  3909.             'Shadow color, opacity, size',
  3910.             $new('span', [
  3911.               $new('input#uiShadowColor', {type: 'color'}), $new('u'),
  3912.               $newRange('uiShadowOpacity', 'Opacity: $%'),
  3913.               $newRange('uiShadow', 'Shadow blur radius: $px\n"0" disables the shadow.', 0, 20),
  3914.             ]),
  3915.           ]),
  3916.           $new('label', ['Padding', $new('span', $newRange('uiPadding', 'Padding: $px'))]),
  3917.           $new('label', ['Margin', $new('span', $newRange('uiMargin', 'Margin: $px'))]),
  3918.         ]),
  3919.         $new('li', [
  3920.           $newLink('Custom CSS:', `${MPIV_BASE_URL}Custom-CSS`),
  3921.           ' e.g. ', $new('b', '#mpiv-popup { animation: none !important }'),
  3922.           $newLink('View the built-in CSS', '', {
  3923.             id: '_reveal',
  3924.             tabIndex: 0,
  3925.             style: 'float: right',
  3926.             title: 'You can copy parts of it to override them in your custom CSS',
  3927.           }),
  3928.           $new('.column', [
  3929.             $new('textarea#css', {spellcheck: false}),
  3930.             $new('textarea#_cssApp', {spellcheck: false, hidden: true, readOnly: true, rows: 30}),
  3931.           ]),
  3932.         ]),
  3933.         $new('li.flex', {style: 'justify-content: space-between;'}, [
  3934.           $new('div',
  3935.             $newLink('Custom host rules:', `${MPIV_BASE_URL}Custom-host-rules`)),
  3936.           $new('div', {style: 'white-space: pre-line'}, [
  3937.             'To disable, put any symbol except ', $new('code', 'a..z 0..9 - .'),
  3938.             '\nin "d" value, for example ', $new('code', '"d": "!foo.com"'),
  3939.           ]),
  3940.           $new('div',
  3941.             $new('input#_search',
  3942.               {type: 'search', placeholder: 'Search', style: 'width: 10em; margin-left: 1em'})),
  3943.         ]),
  3944.         $new('li', {
  3945.           style: 'margin-left: -3px; margin-right: -3px; overflow-y: auto; ' +
  3946.                  'padding-left: 3px; padding-right: 3px;',
  3947.         }, [
  3948.           $new('div#_rules.column',
  3949.             $new('textarea', {spellcheck: false, rows: 1})),
  3950.         ]),
  3951.         $new('li#_rules2'),
  3952.       ]),
  3953.       $new('div.flex', [
  3954.         $new('button#_ok', {accessKey: 'o'}, 'OK'),
  3955.         $new('button#_apply', {accessKey: 'a'}, 'Apply'),
  3956.         $new('button#_cancel', 'Cancel'),
  3957.         $new('a', {href: `${MPIV_BASE_URL}Rules`, style: 'margin: 0 auto'},
  3958.           $new('button#_install', {style: 'color: inherit'}, 'Find rule...')),
  3959.         $new('button#_import', 'Import'),
  3960.         $new('button#_export', {style: 'margin: 0'}, 'Export'),
  3961.         $new('div#_exportNotification', {hidden: true}, 'Copied to clipboard'),
  3962.       ]),
  3963.     ]),
  3964.   ];
  3965. }
  3966.  
  3967. function createGlobalStyle() {
  3968.   App.globalStyle = /*language=CSS*/ (String.raw`
  3969. #\mpiv-bar {
  3970.   position: fixed;
  3971.   z-index: 2147483647;
  3972.   top: 0;
  3973.   left: 0;
  3974.   right: 0;
  3975.   text-align: center;
  3976.   font-family: sans-serif;
  3977.   font-size: 15px;
  3978.   font-weight: bold;
  3979.   background: #0005;
  3980.   color: white;
  3981.   padding: 4px 10px;
  3982.   text-shadow: .5px .5px 2px #000;
  3983.   transition: opacity 1s ease .25s;
  3984.   opacity: 0;
  3985. }
  3986. #\mpiv-bar[data-force] {
  3987.   transition: none;
  3988. }
  3989. #\mpiv-bar.\mpiv-show {
  3990.   opacity: 1;
  3991. }
  3992. #\mpiv-bar[data-zoom][data-prefix]::before {
  3993.   content: "[" attr(data-prefix) "] ";
  3994.   color: gold;
  3995. }
  3996. #\mpiv-bar[data-zoom]:not(:empty)::after {
  3997.   content: " (" attr(data-zoom) ")";
  3998.   opacity: .8;
  3999. }
  4000. #\mpiv-bar[data-zoom]:empty::after {
  4001.   content: attr(data-zoom);
  4002. }
  4003. #\mpiv-popup.\mpiv-show {
  4004.   display: inline;
  4005. }
  4006. #\mpiv-popup {
  4007.   display: none;
  4008.   cursor: none;
  4009.   box-shadow: none;
  4010. ${cfg.uiFadein ? String.raw`
  4011.   animation: .2s \mpiv-fadein both;
  4012.   transition: box-shadow .25s, background-color .25s;
  4013.   ` : ''}
  4014. ${App.popupStyleBase = `
  4015.   border: none;
  4016.   box-sizing: border-box;
  4017.   background-size: cover;
  4018.   position: fixed;
  4019.   z-index: 2147483647;
  4020.   padding: 0;
  4021.   margin: 0;
  4022.   top: 0;
  4023.   left: 0;
  4024.   width: auto;
  4025.   height: auto;
  4026.   transform-origin: center;
  4027.   max-width: none;
  4028.   max-height: none;
  4029. `}
  4030. }
  4031. #\mpiv-popup.\mpiv-show {
  4032.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  4033.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  4034.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  4035. }
  4036. #\mpiv-popup.\mpiv-show${cfg.uiShadowOnLoad ? '[loaded]' : ''} {
  4037.   background-color: ${Util.color('Background')};
  4038.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  4039. }
  4040. #\mpiv-popup[data-gallery-flip] {
  4041.   animation: none;
  4042.   transition: none;
  4043. }
  4044. #\mpiv-popup[${NOAA_ATTR}],
  4045. #\mpiv-popup.\mpiv-zoom-max {
  4046.   image-rendering: pixelated;
  4047. }
  4048. #\mpiv-popup.\mpiv-night:not(#\\0) {
  4049.   box-shadow: 0 0 0 ${Math.max(screen.width, screen.height)}px #000;
  4050. }
  4051. body:has(#\mpiv-popup.\mpiv-night)::-webkit-scrollbar {
  4052.   background: #000;
  4053. }
  4054. #\mpiv-setup {
  4055. }
  4056. @keyframes \mpiv-fadein {
  4057.   from {
  4058.     opacity: 0;
  4059.     border-color: transparent;
  4060.   }
  4061.   to {
  4062.     opacity: 1;
  4063.   }
  4064. }
  4065. ` + (cfg.globalStatus ? String.raw`
  4066. :root.\mpiv-loading:not(.\mpiv-preloading) *:hover {
  4067.   cursor: progress !important;
  4068. }
  4069. :root.\mpiv-edge #\mpiv-popup {
  4070.   cursor: default;
  4071. }
  4072. :root.\mpiv-error *:hover {
  4073.   cursor: not-allowed !important;
  4074. }
  4075. :root.\mpiv-ready *:hover,
  4076. :root.\mpiv-large *:hover {
  4077.   cursor: zoom-in !important;
  4078. }
  4079. :root.\mpiv-shift *:hover {
  4080.   cursor: default !important;
  4081. }
  4082. ` : String.raw`
  4083. [\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]):hover {
  4084.   cursor: progress;
  4085. }
  4086. [\mpiv-status~="edge"]:hover {
  4087.   cursor: default;
  4088. }
  4089. [\mpiv-status~="error"]:hover {
  4090.   cursor: not-allowed;
  4091. }
  4092. [\mpiv-status~="ready"]:hover,
  4093. [\mpiv-status~="large"]:hover {
  4094.   cursor: zoom-in;
  4095. }
  4096. [\mpiv-status~="shift"]:hover {
  4097.   cursor: default;
  4098. }
  4099. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  4100.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  4101.   return App.globalStyle;
  4102. }
  4103.  
  4104. //#region Global utilities
  4105.  
  4106. const clamp = (v, min, max) =>
  4107.   v < min ? min : v > max ? max : v;
  4108.  
  4109. const compareNumbers = (a, b) =>
  4110.   a - b;
  4111.  
  4112. const flattenHtml = str =>
  4113.   str.trim().replace(/\n\s*/g, '');
  4114.  
  4115. const dropEvent = e =>
  4116.   (e.preventDefault(), e.stopPropagation());
  4117.  
  4118. const ensureArray = v =>
  4119.   isArray(v) ? v : [v];
  4120.  
  4121. /** @param {KeyboardEvent} e */
  4122. const eventModifiers = e =>
  4123.   (e.altKey ? '!' : '') +
  4124.   (e.ctrlKey ? '^' : '') +
  4125.   (e.metaKey ? '#' : '') +
  4126.   (e.shiftKey ? '+' : '');
  4127.  
  4128. /** @param {KeyboardEvent} e */
  4129. const describeKey = e => eventModifiers(e) + (e.key && e.key.length > 1 ? e.key : e.code);
  4130.  
  4131. const isFunction = val => typeof val === 'function';
  4132.  
  4133. const isVideo = el => el && el.tagName === 'VIDEO';
  4134.  
  4135. const now = performance.now.bind(performance);
  4136.  
  4137. const sumProps = (...props) => {
  4138.   let sum = 0;
  4139.   for (const p of props)
  4140.     sum += parseFloat(p) || 0;
  4141.   return sum;
  4142. };
  4143.  
  4144. const tryCatch = (fn, ...args) => {
  4145.   try {
  4146.     return fn(...args);
  4147.   } catch (e) {}
  4148. };
  4149.  
  4150. const tryJSON = str =>
  4151.   tryCatch(JSON.parse, str);
  4152.  
  4153. const pick = (obj, path, fn) => {
  4154.   if (obj && path)
  4155.     for (const p of path.split('.'))
  4156.       if (obj) obj = obj[p]; else break;
  4157.   return fn && obj !== undefined ? fn(obj) : obj;
  4158. };
  4159.  
  4160. const $ = (sel, node = doc) =>
  4161.   node.querySelector(sel) || false;
  4162.  
  4163. const $$ = (sel, node = doc) =>
  4164.   node.querySelectorAll(sel);
  4165.  
  4166. const $new = (sel, props, children) => {
  4167.   if (typeof sel !== 'string') {
  4168.     children = props;
  4169.     props = sel;
  4170.     sel = '';
  4171.   }
  4172.   if (!children && props != null && ({}).toString.call(props) !== '[object Object]') {
  4173.     children = props;
  4174.     props = null;
  4175.   }
  4176.   const isFrag = sel === 'fragment';
  4177.   const [, tag, id, cls] = sel.match(/^(\w*)(?:#([^.]+))?(?:\.(.+))?$/);
  4178.   const el = isFrag ? doc.createDocumentFragment() : doc.createElement(tag || 'div');
  4179.   if (id) el.id = id;
  4180.   if (cls) el.className = cls.replace(/\./g, ' ');
  4181.   if (props) {
  4182.     for (const [k, v] of Object.entries(props)) {
  4183.       if (!k.startsWith('data-')) {
  4184.         el[k] = v;
  4185.       } else if (v != null) {
  4186.         el.setAttribute(k, v);
  4187.       }
  4188.     }
  4189.   }
  4190.   if (children != null) {
  4191.     if (isArray(children))
  4192.       el.append(...children.filter(Boolean));
  4193.     else if (children instanceof Node)
  4194.       el.appendChild(children);
  4195.     else
  4196.       el.textContent = children;
  4197.   }
  4198.   return el;
  4199. };
  4200.  
  4201. const $css = (el, props) =>
  4202.   Object.entries(props).forEach(([k, v]) =>
  4203.     el.style.setProperty(k, v, 'important'));
  4204.  
  4205. const $parseHtml = str =>
  4206.   new DOMParser().parseFromString(str, 'text/html');
  4207.  
  4208. const $many = (q, doc) => {
  4209.   for (const selector of ensureArray(q)) {
  4210.     const el = selector && $(selector, doc);
  4211.     if (el)
  4212.       return el;
  4213.   }
  4214. };
  4215.  
  4216. const $prop = (sel, prop, node = doc) =>
  4217.   (node = $(sel, node)) && node[prop] || '';
  4218.  
  4219. const $propUp = (node, prop) =>
  4220.   (node = node.closest(`[${prop}]`)) &&
  4221.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  4222.   '';
  4223.  
  4224. const $remove = node =>
  4225.   node && node.remove();
  4226.  
  4227. const $dataset = ({dataset: d}, key, val) =>
  4228.   val == null ? delete d[key] : (d[key] = val);
  4229.  
  4230. //#endregion
  4231. //#region Init
  4232.  
  4233. (async () => {
  4234.   cfg = await Config.load({save: true});
  4235.   if (!doc.body) {
  4236.     await new Promise(resolve =>
  4237.       new MutationObserver((_, mo) => doc.body && (mo.disconnect(), resolve()))
  4238.         .observe(document, {subtree: true, childList: true}));
  4239.   }
  4240.   const el = doc.body.firstElementChild;
  4241.   if (el) {
  4242.     App.isImageTab = el === doc.body.lastElementChild && el.matches('img, video');
  4243.     App.isEnabled = cfg.imgtab || !App.isImageTab;
  4244.   }
  4245.   if (Menu) Menu.register();
  4246.   addEventListener('mouseover', Events.onMouseOver, true);
  4247.   addEventListener('contextmenu', Events.onContext, true);
  4248.   addEventListener('keydown', Events.onKeyDown, true);
  4249.   addEventListener('visibilitychange', Events.onVisibility, true);
  4250.   addEventListener('blur', Events.onVisibility, true);
  4251.   if (['gf.qytechs.cn', 'github.com'].includes(hostname))
  4252.     addEventListener('click', setupClickedRule, true);
  4253.   addEventListener('message', App.onMessage, true);
  4254. })();
  4255.  
  4256. if (window.trustedTypes) {
  4257.   const TT = window.trustedTypes;
  4258.   const CP = 'createPolicy';
  4259.   const createPolicy = TT[CP];
  4260.   TT[CP] = function ovr(name, opts) {
  4261.     let fn;
  4262.     const p = createPolicy.call(TT, name, opts);
  4263.     if ((trustedHTML || opts[fn = 'createHTML'] && (trustedHTML = p[fn].bind(p))) &&
  4264.         (trustedScript || opts[fn = 'createScript'] && (trustedScript = p[fn].bind(p))) &&
  4265.         TT[CP] === ovr)
  4266.       delete TT[CP];
  4267.     return p;
  4268.   };
  4269. }
  4270.  
  4271. //#endregion

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