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Mouseover Popup Image Viewer

Shows images and videos behind links and thumbnails.

当前为 2020-03-27 提交的版本，查看 最新版本。

  1. //#region Meta
  2. // ==UserScript==
  3. // @name        Mouseover Popup Image Viewer
  4. // @namespace   https://github.com/tophf
  5. // @description Shows images and videos behind links and thumbnails.
  6.  
  7. // @include     *
  8. // @connect     *
  9.  
  10. // allow rule installer in config dialog https://w9p.co/userscripts/mpiv/more_host_rules.html
  11. // @connect     w9p.co
  12.  
  13. // @grant       GM_getValue
  14. // @grant       GM_setValue
  15. // @grant       GM_xmlhttpRequest
  16. // @grant       GM_download
  17. // @grant       GM_openInTab
  18. // @grant       GM_registerMenuCommand
  19.  
  20. // @version     1.1.9
  21. // @author      tophf
  22.  
  23. // @original-version 2017.9.29
  24. // @original-author  kuehlschrank
  25.  
  26. // @supportURL  https://github.com/tophf/mpiv/issues
  27. // @homepage    https://w9p.co/userscripts/mpiv/
  28. // @icon        https://w9p.co/userscripts/mpiv/icon.png
  29. // ==/UserScript==
  30. //#endregion
  31.  
  32. 'use strict';
  33.  
  34. //#region Globals
  35.  
  36. /** @type mpiv.Config */
  37. let cfg;
  38. /** @type mpiv.AppInfo */
  39. let ai = {rule: {}};
  40. /** @type Element */
  41. let elConfig;
  42.  
  43. const undefined = void 0; // eslint-disable-line no-shadow-restricted-names, no-redeclare
  44. const doc = document;
  45. const hostname = location.hostname;
  46. const dotDomain = '.' + hostname;
  47. const isGoogleDomain = /(^|\.)google(\.com?)?(\.\w+)?$/.test(hostname);
  48. const isGoogleImages = isGoogleDomain && /[&?]tbm=isch(&|$)/.test(location.search);
  49.  
  50. const PREFIX = 'mpiv-';
  51. const STATUS_ATTR = `${PREFIX}status`;
  52. const MSG = Object.assign({}, ...[
  53.   'getViewSize',
  54.   'viewSize',
  55. ].map(k => ({[k]: `${PREFIX}${k}`})));
  56. const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
  57. // time for volatile things to settle down meanwhile we postpone action
  58. // examples: loading image from cache, quickly moving mouse over one element to another
  59. const SETTLE_TIME = 50;
  60. // used to detect JS code in host rules
  61. const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
  62. const ZOOM_MAX = 16;
  63.  
  64. //#endregion
  65.  
  66. const App = {
  67.  
  68.   activate(info, event) {
  69.     const {match, node, rule, url} = info;
  70.     if (elConfig) console.info({node, rule, url, match});
  71.     if (ai.node) App.deactivate();
  72.     ai = info;
  73.     ai.force = event.ctrlKey;
  74.     ai.gNum = 0;
  75.     ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
  76.     Util.suppressTooltip();
  77.     Calc.updateViewSize();
  78.     Events.toggle(true);
  79.     Events.trackMouse(event);
  80.     if (ai.force) {
  81.       App.start();
  82.     } else if (cfg.start === 'auto' && !rule.manual) {
  83.       App.belate();
  84.     } else {
  85.       Status.set('ready');
  86.     }
  87.   },
  88.  
  89.   belate() {
  90.     if (cfg.preload) {
  91.       ai.preloadStart = now();
  92.       App.start();
  93.       Status.set('+preloading');
  94.       setTimeout(Status.set, cfg.delay, '-preloading');
  95.     } else {
  96.       ai.timer = setTimeout(App.start, cfg.delay);
  97.     }
  98.   },
  99.  
  100.   checkProgress({start} = {}) {
  101.     const p = ai.popup;
  102.     if (p) {
  103.       const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
  104.       const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
  105.       if (h) {
  106.         const scale = !ai.force && Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1));
  107.         if (scale && scale < cfg.scale) {
  108.           App.deactivate();
  109.           return 'abort';
  110.         }
  111.         App.stopTimers();
  112.         const wait = ai.preloadStart && (ai.preloadStart + cfg.delay - now());
  113.         if (wait > 0) {
  114.           ai.timer = setTimeout(App.checkProgress, wait);
  115.         } else if ((ai.urls || 0).length && Math.max(w, h) < 130) {
  116.           App.handleError({type: 'error'});
  117.         } else {
  118.           App.commit();
  119.         }
  120.         return;
  121.       }
  122.     }
  123.     if (start)
  124.       ai.timerProgress = setInterval(App.checkProgress, 150);
  125.   },
  126.  
  127.   async commit() {
  128.     App.updateStyles();
  129.     Calc.naturalSize();
  130.     const p = ai.popup;
  131.     p.className = `${PREFIX}show`;
  132.     p.removeAttribute('style');
  133.     Calc.updateExtras();
  134.     Calc.updateScales();
  135.     Status.set(false);
  136.     const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
  137.     const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
  138.     if (willMove)
  139.       Popup.move();
  140.     Bar.updateName();
  141.     Bar.updateDetails();
  142.     ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
  143.                ai.nheight > p.clientHeight + ai.extras.h;
  144.     if (ai.large)
  145.       Status.set('large');
  146.     // FF renders a blank bg+border first; I couldn't find a proper solution
  147.     if (p.complete && isFF && ai.large)
  148.       p.style.backgroundImage = `url('${p.src}')`;
  149.   },
  150.  
  151.   deactivate({wait} = {}) {
  152.     App.stopTimers();
  153.     if (ai.popup)
  154.       ai.popup.removeEventListener('load', Popup.onLoad);
  155.     if (ai.req)
  156.       tryCatch.call(ai.req, ai.req.abort);
  157.     if (ai.tooltip)
  158.       ai.tooltip.node.title = ai.tooltip.text;
  159.     Status.set(false);
  160.     Bar.set(false);
  161.     Events.toggle(false);
  162.     Popup.destroy();
  163.     if (wait) {
  164.       App.enabled = false;
  165.       setTimeout(App.enable, 200);
  166.     }
  167.     ai = {rule: {}};
  168.   },
  169.  
  170.   enable() {
  171.     App.enabled = true;
  172.   },
  173.  
  174.   handleError(e, rule = ai.rule) {
  175.     if (isGoogleImages && cfg.xhr && !ai.xhr) {
  176.       ai.xhr = true;
  177.       console.debug('Retrying in XHR mode', ai.url);
  178.       App.startSingle();
  179.       return;
  180.     }
  181.     if (rule && rule.onerror === 'skip')
  182.       return;
  183.     const fe = Util.formatError(e, rule);
  184.     if (!rule || !ai.urls || !ai.urls.length)
  185.       console.warn(fe.consoleFormat, ...fe.consoleArgs);
  186.     if (ai.urls && ai.urls.length) {
  187.       ai.url = ai.urls.shift();
  188.       if (ai.url) {
  189.         App.stopTimers();
  190.         App.startSingle();
  191.       } else {
  192.         App.deactivate();
  193.       }
  194.     } else if (ai.node) {
  195.       Status.set('error');
  196.       Bar.set(fe.message, 'error');
  197.     }
  198.   },
  199.  
  200.   /** @param {MessageEvent} e */
  201.   onMessage(e) {
  202.     if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
  203.       for (const el of doc.getElementsByTagName('iframe')) {
  204.         if (el.contentWindow === e.source) {
  205.           const [w, h] = Calc.frameSize(el, window);
  206.           e.source.postMessage(`${MSG.viewSize}:${w}:${h}`, '*');
  207.           return;
  208.         }
  209.       }
  210.     }
  211.   },
  212.  
  213.   /** @param {MessageEvent} e */
  214.   onMessageChild(e) {
  215.     if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
  216.       window.removeEventListener('message', App.onMessageChild);
  217.       const [w, h] = e.data.split(':').slice(1).map(parseFloat);
  218.       if (w && h) ai.view = {w, h};
  219.     }
  220.   },
  221.  
  222.   start() {
  223.     // check explicitly as the cursor may have moved into an iframe so mouseout wasn't reported
  224.     if (!ai.node.closest(':hover')) {
  225.       App.deactivate();
  226.       return;
  227.     }
  228.     App.updateStyles();
  229.     if (ai.gallery)
  230.       App.startGallery();
  231.     else
  232.       App.startSingle();
  233.   },
  234.  
  235.   startSingle() {
  236.     Status.loading();
  237.     ai.imageUrl = null;
  238.     if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
  239.       Remoting.findRedirect();
  240.     } else if (ai.rule.q && !Array.isArray(ai.urls)) {
  241.       App.startFromQ();
  242.     } else {
  243.       Popup.create(ai.url);
  244.       Ruler.runC();
  245.     }
  246.   },
  247.  
  248.   async startFromQ() {
  249.     try {
  250.       const {responseText, doc, finalUrl} = await Remoting.getDoc(ai.url);
  251.       const url = Ruler.runQ(responseText, doc, finalUrl);
  252.       if (!url)
  253.         throw 'The "q" rule did not produce any URL.';
  254.       if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
  255.         const info = RuleMatcher.find(url, ai.node, {noHtml: true});
  256.         if (!info || !info.url)
  257.           throw `Couldn't follow URL: ${url}`;
  258.         Object.assign(ai, info);
  259.         App.startSingle();
  260.       } else {
  261.         Popup.create(url, finalUrl);
  262.         Ruler.runC(responseText, doc);
  263.       }
  264.     } catch (e) {
  265.       App.handleError(e);
  266.     }
  267.   },
  268.  
  269.   async startGallery() {
  270.     Status.loading();
  271.     try {
  272.       const startUrl = ai.url;
  273.       const p = ai.rule.s === 'gallery' ? {} : await Remoting.getDoc(startUrl);
  274.       const items = await new Promise(resolve => {
  275.         const it = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, resolve);
  276.         if (Array.isArray(it))
  277.           resolve(it);
  278.       });
  279.       // bail out if the gallery's async callback took too long
  280.       if (ai.url !== startUrl) return;
  281.       ai.gNum = items.length;
  282.       ai.gItems = items.length && items;
  283.       if (ai.gItems) {
  284.         ai.gIndex = Gallery.findIndex(ai.url);
  285.         setTimeout(Gallery.next);
  286.       } else {
  287.         throw 'Empty gallery';
  288.       }
  289.     } catch (e) {
  290.       App.handleError(e);
  291.     }
  292.   },
  293.  
  294.   stopTimers() {
  295.     for (const timer of ['timer', 'timerBar', 'timerStatus'])
  296.       clearTimeout(ai[timer]);
  297.     clearInterval(ai.timerProgress);
  298.   },
  299.  
  300.   toggleZoom({keepScale} = {}) {
  301.     const p = ai.popup;
  302.     if (!p || !ai.scales || ai.scales.length < 2)
  303.       return;
  304.     ai.zoomed = !ai.zoomed;
  305.     ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
  306.     if (ai.zooming)
  307.       p.classList.add(`${PREFIX}zooming`);
  308.     Popup.move();
  309.     Bar.updateDetails();
  310.     Status.set(ai.zoomed ? 'zoom' : false);
  311.     return ai.zoomed;
  312.   },
  313.  
  314.   updateStyles() {
  315.     Util.addStyle('global',
  316.       (App.globalStyle || createGlobalStyle()) +
  317.       (cfg.css.includes('{') ? cfg.css : `#${PREFIX}-popup {${(cfg.css)}}`));
  318.     Util.addStyle('rule', ai.rule.css || '');
  319.   },
  320. };
  321.  
  322. const Bar = {
  323.  
  324.   set(label, className) {
  325.     let b = ai.bar;
  326.     if (typeof label !== 'string') {
  327.       $remove(b);
  328.       ai.bar = null;
  329.       return;
  330.     }
  331.     if (!b) b = ai.bar = $create('div', {id: `${PREFIX}bar`});
  332.     App.updateStyles();
  333.     Bar.updateDetails();
  334.     Bar.show();
  335.     b.innerHTML = label;
  336.     if (!b.parentNode) {
  337.       doc.body.appendChild(b);
  338.       Util.forceLayout(b);
  339.     }
  340.     b.className = `${PREFIX}show ${PREFIX}${className}`;
  341.   },
  342.  
  343.   show() {
  344.     clearTimeout(ai.timerBar);
  345.     ai.bar.style.removeProperty('opacity');
  346.     ai.timerBar = setTimeout(() => ai.bar && $css(ai.bar, {opacity: 0}), 3000);
  347.   },
  348.  
  349.   updateName() {
  350.     const {gItems: gi, gIndex: i, gNum: n} = ai;
  351.     if (gi) {
  352.       const item = gi[i];
  353.       const noDesc = !gi.some(_ => _.desc);
  354.       const c = `${n > 1 ? `[${i + 1}/${n}] ` : ''}${[
  355.         gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
  356.         item.desc,
  357.       ].filter(Boolean).join(' - ')}`;
  358.       Bar.set(c.trim() || ' ', 'gallery', true);
  359.     } else if ('caption' in ai) {
  360.       Bar.set(ai.caption, 'caption');
  361.     } else if (ai.tooltip) {
  362.       Bar.set(ai.tooltip.text, 'tooltip');
  363.     } else {
  364.       Bar.set(' ', 'info');
  365.     }
  366.   },
  367.  
  368.   updateDetails() {
  369.     if (!ai.bar) return;
  370.     const zoom = ai.nwidth && `${
  371.       Math.round(ai.scale * 100)
  372.     }%, ${
  373.       ai.nwidth
  374.     } x ${
  375.       ai.nheight
  376.     } px, ${
  377.       Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
  378.     } MP`.replace(/\x20/g, '\xA0');
  379.     if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
  380.       if (zoom) ai.bar.dataset.zoom = zoom;
  381.       else delete ai.bar.dataset.zoom;
  382.       Bar.show();
  383.     }
  384.   },
  385. };
  386.  
  387. const Calc = {
  388.  
  389.   frameSize(elFrame, parentWindow) {
  390.     if (!elFrame) return;
  391.     const r = elFrame.getBoundingClientRect();
  392.     const w = clamp(r.width, 0, parentWindow.innerWidth - r.left);
  393.     const h = clamp(r.height, 0, parentWindow.innerHeight - r.top);
  394.     return [w, h];
  395.   },
  396.  
  397.   generateScales(fit) {
  398.     let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
  399.     const zoomStep = cfg.zoomStep / 100;
  400.     const arr = [scale];
  401.     if (fit !== 1) {
  402.       const diff = goal / scale;
  403.       const steps = Math.log(diff) / Math.log(zoomStep) | 0;
  404.       const step = steps && Math.pow(diff, 1 / steps);
  405.       for (let i = steps; --i > 0;)
  406.         arr.push((scale *= step));
  407.       arr.push(scale = goal);
  408.     }
  409.     while ((scale *= zoomStep) <= ZOOM_MAX)
  410.       arr.push(scale);
  411.     return arr;
  412.   },
  413.  
  414.   naturalSize() {
  415.     let {popup: p, nwidth: nw, nheight: nh} = ai;
  416.     // overriding custom CSS to detect an unrestricted SVG that scales to the entire page
  417.     p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
  418.     if (p.clientWidth > nw) {
  419.       const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
  420.       nh = ai.nheight = w / nw * nh | 0;
  421.       nw = ai.nwidth = w;
  422.       p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
  423.     }
  424.   },
  425.  
  426.   rect() {
  427.     let {node, rule} = ai;
  428.     let n = rule.rect && node.closest(rule.rect);
  429.     if (n) return n.getBoundingClientRect();
  430.     const nested = node.getElementsByTagName('*');
  431.     let maxArea = 0;
  432.     let maxBounds;
  433.     n = node;
  434.     for (let i = 0; n; n = nested[i++]) {
  435.       const bounds = n.getBoundingClientRect();
  436.       const area = bounds.width * bounds.height;
  437.       if (area > maxArea) {
  438.         maxArea = area;
  439.         maxBounds = bounds;
  440.         node = n;
  441.       }
  442.     }
  443.     return maxBounds;
  444.   },
  445.  
  446.   placement() {
  447.     if (!ai.popup) return;
  448.     let x, y;
  449.     const {cx, cy, extras, view} = ai;
  450.     const vw = view.w - extras.outw;
  451.     const vh = view.h - extras.outh;
  452.     const w = ai.scale * ai.nwidth + extras.inw;
  453.     const h = ai.scale * ai.nheight + extras.inh;
  454.     if (!ai.zoomed && ai.gNum < 2 && !cfg.center) {
  455.       const r = ai.rect;
  456.       const rx = (r.left + r.right) / 2;
  457.       const ry = (r.top + r.bottom) / 2;
  458.       if (vw - r.right - 40 > w || w < r.left - 40) {
  459.         if (h < vh - 60)
  460.           y = clamp(ry - h / 2, 30, vh - h - 30);
  461.         x = rx > vw / 2 ? r.left - 40 - w : r.right + 40;
  462.       } else if (vh - r.bottom - 40 > h || h < r.top - 40) {
  463.         if (w < vw - 60)
  464.           x = clamp(rx - w / 2, 30, vw - w - 30);
  465.         y = ry > vh / 2 ? r.top - 40 - h : r.bottom + 40;
  466.       }
  467.     }
  468.     if (x == null)
  469.       x = (vw - w) * (vw > w ? .5 : clamp(5 / 3 * (cx / vw - .2), 0, 1));
  470.     if (y == null)
  471.       y = (vh - h) * (vh > h ? .5 : clamp(5 / 3 * (cy / vh - .2), 0, 1));
  472.     return {
  473.       x: Math.round(x + extras.o),
  474.       y: Math.round(y + extras.o),
  475.       w: Math.round(w),
  476.       h: Math.round(h),
  477.     };
  478.   },
  479.  
  480.   scaleBiggerThan(scale, i, arr) {
  481.     return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
  482.   },
  483.  
  484.   scaleIndex(dir) {
  485.     const i = ai.scales.indexOf(ai.scale);
  486.     if (i >= 0) return i + dir;
  487.     for (
  488.       let len = ai.scales.length,
  489.         i = dir > 0 ? 0 : len - 1;
  490.       i >= 0 && i < len;
  491.       i += dir
  492.     ) {
  493.       if (Math.sign(ai.scales[i] - ai.scale) === dir)
  494.         return i;
  495.     }
  496.     return -1;
  497.   },
  498.  
  499.   scaleForFirstZoom(keepScale) {
  500.     const z = ai.scaleZoom;
  501.     return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
  502.   },
  503.  
  504.   updateExtras() {
  505.     const s = getComputedStyle(ai.popup);
  506.     const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
  507.     const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
  508.     const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
  509.     const outw = o2 + sumProps(s.marginLeft, s.marginRight);
  510.     const outh = o2 + sumProps(s.marginTop, s.marginBottom);
  511.     ai.extras = {
  512.       inw, inh,
  513.       outw, outh,
  514.       o: o2 / 2,
  515.       w: inw + outw,
  516.       h: inh + outh,
  517.     };
  518.   },
  519.  
  520.   updateScales() {
  521.     const fit = Math.min(
  522.       (ai.view.w - ai.extras.w) / ai.nwidth,
  523.       (ai.view.h - ai.extras.h) / ai.nheight) || 1;
  524.     const isCustom = !cfg.fit && cfg.scales.length;
  525.     let cutoff = Math.min(1, fit);
  526.     let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
  527.     if (isCustom) {
  528.       const dst = [];
  529.       for (const scale of cfg.scales) {
  530.         const val = parseFloat(scale) || fit;
  531.         dst.push(val);
  532.         if (isCustom && typeof scale === 'string') {
  533.           if (scale.includes('!')) cutoff = val;
  534.           if (scale.includes('*')) scaleZoom = val;
  535.         }
  536.       }
  537.       ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
  538.     } else {
  539.       ai.scales = Calc.generateScales(fit);
  540.     }
  541.     ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
  542.     ai.scaleFit = fit;
  543.     ai.scaleZoom = scaleZoom;
  544.   },
  545.  
  546.   updateViewSize() {
  547.     const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
  548.     ai.view = {
  549.       w: view.clientWidth,
  550.       h: view.clientHeight,
  551.     };
  552.     if (window === top) return;
  553.     const [w, h] = Calc.frameSize(frameElement, parent) || [];
  554.     if (w && h) {
  555.       ai.view = {w, h};
  556.     } else {
  557.       window.addEventListener('message', App.onMessageChild);
  558.       parent.postMessage(MSG.getViewSize, '*');
  559.     }
  560.   },
  561. };
  562.  
  563. class Config {
  564.  
  565.   constructor({data: c = GM_getValue('cfg'), save}) {
  566.     if (typeof c === 'string')
  567.       c = tryCatch(JSON.parse, c);
  568.     if (typeof c !== 'object' || !c)
  569.       c = {};
  570.     const {DEFAULTS} = Config;
  571.     c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
  572.       !(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
  573.         '';
  574.     if (c.version !== DEFAULTS.version) {
  575.       if (typeof c.hosts === 'string')
  576.         c.hosts = c.hosts.split('\n')
  577.           .map(s => tryCatch(JSON.parse, s) || s)
  578.           .filter(Boolean);
  579.       if (c.close === true || c.close === false)
  580.         c.zoomOut = c.close ? 'auto' : 'stay';
  581.       for (const key in DEFAULTS)
  582.         if (typeof c[key] !== typeof DEFAULTS[key])
  583.           c[key] = DEFAULTS[key];
  584.       if (c.version === 3 && c.scales[0] === 0)
  585.         c.scales[0] = '0!';
  586.       for (const key in c)
  587.         if (!(key in DEFAULTS))
  588.           delete c[key];
  589.       c.version = DEFAULTS.version;
  590.       if (save)
  591.         GM_setValue('cfg', c);
  592.     }
  593.     if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
  594.       App.globalStyle = '';
  595.     if (!Array.isArray(c.scales))
  596.       c.scales = [];
  597.     c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
  598.     Object.assign(this, DEFAULTS, c);
  599.   }
  600. }
  601.  
  602. /** @type mpiv.Config */
  603. Config.DEFAULTS = Object.assign(Object.create(null), {
  604.   center: false,
  605.   css: '',
  606.   delay: 500,
  607.   fit: '',
  608.   globalStatus: false,
  609.   // prefer ' inside rules because " will be displayed as \"
  610.   // example: "img[src*='icon']"
  611.   hosts: [{
  612.     name: 'No popup for YouTube thumbnails',
  613.     d: 'www.youtube.com',
  614.     e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
  615.     s: '',
  616.   }, {
  617.     name: 'No popup for SVG/PNG icons',
  618.     d: '',
  619.     e: "img[src*='icon']",
  620.     r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
  621.     s: '',
  622.   }],
  623.   imgtab: false,
  624.   preload: false,
  625.   scale: 1.25,
  626.   scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
  627.   start: 'auto',
  628.   uiBackgroundColor: '#ffffff',
  629.   uiBackgroundOpacity: 100,
  630.   uiBorderColor: '#000000',
  631.   uiBorderOpacity: 100,
  632.   uiBorder: 0,
  633.   uiShadowColor: '#000000',
  634.   uiShadowOpacity: 80,
  635.   uiShadow: 20,
  636.   uiPadding: 0,
  637.   uiMargin: 0,
  638.   version: 6,
  639.   xhr: true,
  640.   zoom: 'context',
  641.   zoomOut: 'auto',
  642.   zoomStep: 133,
  643. });
  644.  
  645. const Events = {
  646.  
  647.   hoverData: [],
  648.   hoverTimer: 0,
  649.  
  650.   onMouseOver(e) {
  651.     if (!App.enabled || e.shiftKey || ai.zoomed)
  652.       return;
  653.     let node = e.target;
  654.     if (node === ai.popup ||
  655.         node === doc.body ||
  656.         node === doc.documentElement ||
  657.         node === elConfig ||
  658.         ai.gallery && ai.rectHovered)
  659.       return;
  660.     if (node.shadowRoot)
  661.       node = Events.pierceShadow(node, e.clientX, e.clientY);
  662.     // we don't want to process everything in the path of a quickly moving mouse cursor
  663.     Events.hoverData = [now(), e, node];
  664.     Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
  665.   },
  666.  
  667.   onMouseOverThrottled() {
  668.     const [start, e, node] = Events.hoverData;
  669.     // clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
  670.     const wait = start + SETTLE_TIME - now();
  671.     Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
  672.     if (Events.hoverTimer)
  673.       return;
  674.     if (!node.closest(':hover'))
  675.       return;
  676.     if (!Ruler.rules)
  677.       Ruler.init();
  678.     let a;
  679.     const tag = node.tagName;
  680.     const src = node.currentSrc || node.src;
  681.     const isPic = tag === 'IMG' || tag === 'VIDEO' && /\.(webm|mp4)(\?|$)/.test(src);
  682.     const info =
  683.       // note that data URLs aren't passed to rules as those may have fatally ineffective regexps
  684.       tag !== 'A' &&
  685.         RuleMatcher.find(isPic && !src.startsWith('data:') && Util.rel2abs(src), node) ||
  686.       (a = node.closest('A')) &&
  687.         RuleMatcher.findForLink(a) ||
  688.       isPic &&
  689.         {node, rule: {}, url: src};
  690.     if (info && info.url && info.node !== ai.node)
  691.       App.activate(info, e);
  692.   },
  693.  
  694.   onMouseOut(e) {
  695.     if (!e.relatedTarget && !e.shiftKey)
  696.       App.deactivate();
  697.   },
  698.  
  699.   onMouseOutShadow(e) {
  700.     const root = e.target.shadowRoot;
  701.     if (root) {
  702.       root.removeEventListener('mouseover', Events.onMouseOver);
  703.       root.removeEventListener('mouseout', Events.onMouseOutShadow);
  704.     }
  705.   },
  706.  
  707.   onMouseMove(e) {
  708.     Events.trackMouse(e);
  709.     if (e.shiftKey) {
  710.       ai.lazyUnload = true;
  711.     } else if (!ai.zoomed && !ai.rectHovered) {
  712.       App.deactivate();
  713.     } else if (ai.zoomed) {
  714.       Popup.move();
  715.       const {cx, cy, view: {w, h}} = ai;
  716.       const bx = w / 6;
  717.       const by = h / 6;
  718.       const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
  719.       Status.set(`${onEdge ? '+' : '-'}edge`);
  720.     }
  721.   },
  722.  
  723.   onMouseDown({shiftKey, button}) {
  724.     if (button === 0 && shiftKey && ai.popup && ai.popup.controls) {
  725.       ai.controlled = ai.zoomed = true;
  726.     } else if (button === 2 || shiftKey) {
  727.       // we ignore RMB and Shift
  728.     } else {
  729.       App.deactivate({wait: true});
  730.       document.addEventListener('mouseup', App.enable, {once: true});
  731.     }
  732.   },
  733.  
  734.   onMouseScroll(e) {
  735.     const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
  736.     if (ai.zoomed) {
  737.       Events.zoomInOut(dir);
  738.     } else if (ai.gNum > 1 && ai.popup) {
  739.       Gallery.next(-dir);
  740.     } else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
  741.       App.toggleZoom();
  742.     } else {
  743.       App.deactivate();
  744.       return;
  745.     }
  746.     dropEvent(e);
  747.   },
  748.  
  749.   onKeyDown(e) {
  750.     switch (e.key) {
  751.       case 'Shift':
  752.         Status.set('+shift');
  753.         if (ai.popup && 'controls' in ai.popup)
  754.           ai.popup.controls = true;
  755.         break;
  756.       case 'Control':
  757.         if (!ai.popup && (cfg.start !== 'auto' || ai.rule.manual))
  758.           App.start();
  759.         break;
  760.     }
  761.   },
  762.  
  763.   onKeyUp(e) {
  764.     switch (e.key.length > 1 ? e.key : e.code) {
  765.       case 'Shift':
  766.         Status.set('-shift');
  767.         if ((ai.popup || {}).controls)
  768.           ai.popup.controls = false;
  769.         if (ai.controlled) {
  770.           ai.controlled = false;
  771.           return;
  772.         }
  773.         if (ai.popup && (ai.zoomed || ai.rectHovered !== false))
  774.           App.toggleZoom();
  775.         else
  776.           App.deactivate({wait: true});
  777.         break;
  778.       case 'Control':
  779.         break;
  780.       case 'Escape':
  781.         App.deactivate({wait: true});
  782.         break;
  783.       case 'ArrowRight':
  784.       case 'KeyJ':
  785.         dropEvent(e);
  786.         Gallery.next(1);
  787.         break;
  788.       case 'ArrowLeft':
  789.       case 'KeyK':
  790.         dropEvent(e);
  791.         Gallery.next(-1);
  792.         break;
  793.       case 'KeyD': {
  794.         dropEvent(e);
  795.         Remoting.saveFile();
  796.         break;
  797.       }
  798.       case 'KeyT':
  799.         ai.lazyUnload = true;
  800.         GM_openInTab(Util.tabFixUrl() || ai.popup.src);
  801.         App.deactivate();
  802.         break;
  803.       default:
  804.         App.deactivate({wait: true});
  805.     }
  806.   },
  807.  
  808.   onContext(e) {
  809.     if (e.shiftKey) return;
  810.     if (cfg.zoom === 'context' && ai.popup && App.toggleZoom()) {
  811.       dropEvent(e);
  812.     } else if (!ai.popup && (cfg.start === 'context' || (cfg.start === 'auto' && ai.rule.manual))) {
  813.       App.start();
  814.       dropEvent(e);
  815.     } else {
  816.       setTimeout(App.deactivate, SETTLE_TIME, {wait: true});
  817.     }
  818.   },
  819.  
  820.   pierceShadow(node, x, y) {
  821.     for (let root; (root = node.shadowRoot);) {
  822.       root.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  823.       root.addEventListener('mouseout', Events.onMouseOutShadow);
  824.       const inner = root.elementFromPoint(x, y);
  825.       if (!inner || inner === node)
  826.         break;
  827.       node = inner;
  828.     }
  829.     return node;
  830.   },
  831.  
  832.   toggle(enable) {
  833.     const onOff = enable ? doc.addEventListener : doc.removeEventListener;
  834.     const passive = enable ? {passive: true} : undefined;
  835.     onOff.call(doc, 'mousemove', Events.onMouseMove, passive);
  836.     onOff.call(doc, 'mouseout', Events.onMouseOut, passive);
  837.     onOff.call(doc, 'mousedown', Events.onMouseDown, passive);
  838.     onOff.call(doc, 'contextmenu', Events.onContext);
  839.     onOff.call(doc, 'keydown', Events.onKeyDown);
  840.     onOff.call(doc, 'keyup', Events.onKeyUp);
  841.     onOff.call(doc, WHEEL_EVENT, Events.onMouseScroll, enable ? {passive: false} : undefined);
  842.   },
  843.  
  844.   trackMouse(e) {
  845.     const cx = ai.cx = e.clientX;
  846.     const cy = ai.cy = e.clientY;
  847.     const r = ai.rect || (ai.rect = Calc.rect());
  848.     ai.rectHovered =
  849.       cx > r.left - 2 && cx < r.right + 2 &&
  850.       cy > r.top - 2 && cy < r.bottom + 2;
  851.   },
  852.  
  853.   zoomInOut(dir) {
  854.     const i = Calc.scaleIndex(dir);
  855.     const n = ai.scales.length;
  856.     if (i >= 0 && i < n)
  857.       ai.scale = ai.scales[i];
  858.     const zo = cfg.zoomOut;
  859.     if (i <= 0 && zo !== 'stay') {
  860.       if (ai.scaleFit < ai.scale * .99) {
  861.         ai.scales.unshift(ai.scale = ai.scaleFit);
  862.       } else if ((i <= 0 && zo === 'close' || i < 0 && !ai.rectHovered) && ai.gNum < 2) {
  863.         App.deactivate({wait: true});
  864.         return;
  865.       }
  866.       ai.zoomed = zo !== 'unzoom';
  867.     } else {
  868.       ai.popup.classList.toggle(`${PREFIX}zoom-max`, ai.scale >= 4 && i >= n - 1);
  869.     }
  870.     if (ai.zooming)
  871.       ai.popup.classList.add(`${PREFIX}zooming`);
  872.     Popup.move();
  873.     Bar.updateDetails();
  874.   },
  875. };
  876.  
  877. const Gallery = {
  878.  
  879.   makeParser(g) {
  880.     return (
  881.       typeof g === 'function' ? g :
  882.         typeof g === 'string' ? Util.newFunction('text', 'doc', 'url', 'm', 'rule', 'cb', g) :
  883.           Gallery.defaultParser
  884.     );
  885.   },
  886.  
  887.   findIndex(gUrl) {
  888.     const sel = gUrl.split('#')[1];
  889.     if (!sel)
  890.       return 0;
  891.     if (/^\d+$/.test(sel))
  892.       return parseInt(sel);
  893.     for (let i = ai.gNum; i--;) {
  894.       let {url} = ai.gItems[i];
  895.       if (Array.isArray(url))
  896.         url = url[0];
  897.       if (url.indexOf(sel, url.lastIndexOf('/')) > 0)
  898.         return i;
  899.     }
  900.     return 0;
  901.   },
  902.  
  903.   next(dir) {
  904.     if (dir) ai.gIndex = Gallery.nextIndex(dir);
  905.     const item = ai.gItems[ai.gIndex];
  906.     if (Array.isArray(item.url)) {
  907.       ai.urls = item.url.slice(1);
  908.       ai.url = item.url[0];
  909.     } else {
  910.       ai.urls = null;
  911.       ai.url = item.url;
  912.     }
  913.     Popup.destroy();
  914.     App.startSingle();
  915.     Bar.updateName();
  916.     Gallery.preload(dir);
  917.   },
  918.  
  919.   nextIndex(dir) {
  920.     return (ai.gIndex + dir + ai.gNum) % ai.gNum;
  921.   },
  922.  
  923.   preload(dir) {
  924.     if (!ai.popup || !dir) return;
  925.     ai.preloadUrl = ensureArray(ai.gItems[Gallery.nextIndex(dir)].url)[0];
  926.     ai.popup.addEventListener('load', Gallery.preloadOnLoad, {once: true});
  927.   },
  928.  
  929.   preloadOnLoad() {
  930.     $create('img', {src: ai.preloadUrl});
  931.   },
  932.  
  933.   defaultParser(text, doc, docUrl, m, rule) {
  934.     const {g} = rule;
  935.     const qEntry = g.entry;
  936.     const qCaption = ensureArray(g.caption);
  937.     const qImage = g.image;
  938.     const qTitle = g.title;
  939.     const fix =
  940.       (typeof g.fix === 'string' ? Util.newFunction('s', 'isURL', g.fix) : g.fix) ||
  941.       (s => s.trim());
  942.     const items = [...$$(qEntry || qImage, doc)]
  943.       .map(processEntry)
  944.       .filter(Boolean);
  945.     items.title = processTitle();
  946.     return items;
  947.  
  948.     function processEntry(entry) {
  949.       const item = {};
  950.       try {
  951.         const img = qEntry ? $(qImage, entry) : entry;
  952.         item.url = fix(Remoting.findImageUrl(img, docUrl), true);
  953.         item.desc = qCaption.map(processCaption, entry).filter(Boolean).join(' - ');
  954.       } catch (e) {}
  955.       return item.url && item;
  956.     }
  957.  
  958.     function processCaption(selector) {
  959.       const el = $(selector, this) ||
  960.                  $orSelf(selector, this.previousElementSibling) ||
  961.                  $orSelf(selector, this.nextElementSibling);
  962.       return el && fix(el.textContent);
  963.     }
  964.  
  965.     function processTitle() {
  966.       const el = $(qTitle, doc);
  967.       return el && fix(el.getAttribute('content') || el.textContent) || '';
  968.     }
  969.  
  970.     function $orSelf(selector, el) {
  971.       if (el && !el.matches(qEntry))
  972.         return el.matches(selector) ? el : $(selector, el);
  973.     }
  974.   },
  975. };
  976.  
  977. const Popup = {
  978.  
  979.   async create(src, pageUrl) {
  980.     Popup.destroy();
  981.     ai.imageUrl = src;
  982.     if (ai.xhr && src)
  983.       src = await Remoting.getImage(src, pageUrl).catch(App.handleError);
  984.     if (!src) return;
  985.     const isVideo = Util.isVideoUrl(src);
  986.     const p = ai.popup = isVideo ? PopupVideo.create() : $create('img');
  987.     p.id = `${PREFIX}popup`;
  988.     p.src = src;
  989.     p.addEventListener('error', App.handleError);
  990.     if (ai.zooming)
  991.       p.addEventListener('transitionend', Popup.onZoom);
  992.     doc.body.insertBefore(p, ai.bar || undefined);
  993.     await 0;
  994.     if (App.checkProgress({start: true}) === 'abort')
  995.       return;
  996.     if (p.complete)
  997.       Popup.onLoad.call(ai.popup);
  998.     else if (!isVideo)
  999.       p.addEventListener('load', Popup.onLoad, {once: true});
  1000.   },
  1001.  
  1002.   destroy() {
  1003.     const p = ai.popup;
  1004.     if (!p) return;
  1005.     p.removeEventListener('error', App.handleError);
  1006.     if (typeof p.pause === 'function')
  1007.       p.pause();
  1008.     if (!ai.lazyUnload) {
  1009.       if (p.src.startsWith('blob:'))
  1010.         URL.revokeObjectURL(p.src);
  1011.     }
  1012.     p.remove();
  1013.     ai.zoomed = ai.popup = ai.popupLoaded = null;
  1014.   },
  1015.  
  1016.   move() {
  1017.     const p = Calc.placement();
  1018.     $css(ai.popup, {
  1019.       transform: `translate(${p.x}px, ${p.y}px)`,
  1020.       width: `${p.w}px`,
  1021.       height: `${p.h}px`,
  1022.     });
  1023.   },
  1024.  
  1025.   onLoad() {
  1026.     this.setAttribute('loaded', '');
  1027.     ai.popupLoaded = true;
  1028.   },
  1029.  
  1030.   onZoom() {
  1031.     this.classList.remove(`${PREFIX}zooming`);
  1032.   },
  1033. };
  1034.  
  1035. const PopupVideo = {
  1036.   create() {
  1037.     ai.bufBar = false;
  1038.     ai.bufStart = now();
  1039.     const shouldMute = new AudioContext().state === 'suspended';
  1040.     return $create('video', {
  1041.       autoplay: true,
  1042.       controls: shouldMute,
  1043.       muted: shouldMute,
  1044.       loop: true,
  1045.       volume: clamp(+GM_getValue('volume') || .5, 0, 1),
  1046.       onprogress: PopupVideo.progress,
  1047.       oncanplaythrough: PopupVideo.progressDone,
  1048.       onvolumechange: PopupVideo.rememberVolume,
  1049.     });
  1050.   },
  1051.  
  1052.   progress() {
  1053.     const {duration} = this;
  1054.     if (duration && this.buffered.length && now() - ai.bufStart > 2000) {
  1055.       const pct = Math.round(this.buffered.end(0) / duration * 100);
  1056.       if ((ai.bufBar |= pct > 0 && pct < 50))
  1057.         Bar.set(`${pct}% of ${Math.round(duration)}s`, 'xhr');
  1058.     }
  1059.   },
  1060.  
  1061.   progressDone() {
  1062.     this.onprogress = this.oncanplaythrough = null;
  1063.     if (ai.bar && ai.bar.classList.contains(`${PREFIX}xhr`))
  1064.       Bar.set(false);
  1065.     Popup.onLoad.call(this);
  1066.   },
  1067.  
  1068.   rememberVolume() {
  1069.     GM_setValue('volume', this.volume);
  1070.   },
  1071. };
  1072.  
  1073. const Ruler = {
  1074. /*
  1075.  'u' works only with URLs so it's ignored if 'html' is true
  1076.    ||some.domain = matches some.domain, anything.some.domain, etc.
  1077.    |foo = url or text must start with foo
  1078.    ^ = separator like / or ? or : but not a letter/number, not %._-
  1079.        when used at the end like "foo^" it additionally matches when the source ends with "foo"
  1080.  'r' is checked only if 'u' matches first
  1081. */
  1082.   init() {
  1083.     const errors = new Map();
  1084.     const customRules = (cfg.hosts || []).map(Ruler.parse, errors);
  1085.     for (const rule of errors.keys())
  1086.       App.handleError('Invalid custom host rule:', rule);
  1087.  
  1088.     // rules that disable previewing
  1089.     const disablers = [
  1090.       dotDomain.endsWith('.stackoverflow.com') && {
  1091.         e: '.post-tag, .post-tag img',
  1092.         s: '',
  1093.       },
  1094.       {
  1095.         u: '||disqus.com/',
  1096.         s: '',
  1097.       },
  1098.     ];
  1099.  
  1100.     // optimization: a rule is created only when on domain
  1101.     const perDomain = [
  1102.       hostname.includes('startpage') && {
  1103.         r: /\boiu=(.+)/,
  1104.         s: '$1',
  1105.         follow: true,
  1106.       },
  1107.       dotDomain.endsWith('.4chan.org') && {
  1108.         e: '.is_catalog .thread a[href*="/thread/"], .catalog-thread a[href*="/thread/"]',
  1109.         q: '.op .fileText a',
  1110.         css: '#post-preview{display:none}',
  1111.       },
  1112.       hostname.includes('amazon.') && {
  1113.         r: /.+?images\/I\/.+?\./,
  1114.         s: m => {
  1115.           const uh = doc.getElementById('universal-hover');
  1116.           return uh ? '' : m[0] + 'jpg';
  1117.         },
  1118.         css: '#zoomWindow{display:none!important;}',
  1119.       },
  1120.       dotDomain.endsWith('.bing.com') && {
  1121.         e: 'a[m*="murl"]',
  1122.         r: /murl&quot;:&quot;(.+?)&quot;/,
  1123.         s: '$1',
  1124.         html: true,
  1125.       },
  1126.       ...dotDomain.endsWith('.deviantart.com') && [{
  1127.         e: '[data-super-full-img] *, img[src*="/th/"]',
  1128.         s: (m, node) =>
  1129.           $propUp(node, 'data-super-full-img') ||
  1130.           (node = node.dataset.embedId && node.nextElementSibling) &&
  1131.           node.dataset.embedId && node.src,
  1132.       }, {
  1133.         e: '.dev-view-deviation img',
  1134.         s: () => [
  1135.           $('.dev-page-download').href,
  1136.           $('.dev-content-full').src,
  1137.         ].filter(Boolean),
  1138.       }, {
  1139.         e: 'a[data-hook=deviation_link]',
  1140.         q: 'link[as=image]',
  1141.       }] || [],
  1142.       dotDomain.endsWith('.dropbox.com') && {
  1143.         r: /(.+?&size_mode)=\d+(.*)/,
  1144.         s: '$1=5$2',
  1145.       },
  1146.       dotDomain.endsWith('.facebook.com') && {
  1147.         e: 'a[href*="ref=hovercard"]',
  1148.         s: (m, node) =>
  1149.           'https://www.facebook.com/photo.php?fbid=' +
  1150.           /\/[0-9]+_([0-9]+)_/.exec($('img', node).src)[1],
  1151.         follow: true,
  1152.       },
  1153.       dotDomain.endsWith('.facebook.com') && {
  1154.         r: /(fbcdn|external).*?(app_full_proxy|safe_image).+?(src|url)=(http.+?)[&"']/,
  1155.         s: (m, node) =>
  1156.           node.parentNode.className.includes('video') && m[4].includes('fbcdn') ? '' :
  1157.             decodeURIComponent(m[4]),
  1158.         html: true,
  1159.         follow: true,
  1160.       },
  1161.       dotDomain.endsWith('.flickr.com') &&
  1162.       tryCatch(() => unsafeWindow.YUI_config.flickr.api.site_key) && {
  1163.         r: /flickr\.com\/photos\/[^/]+\/(\d+)/,
  1164.         s: m => `https://www.flickr.com/services/rest/?${
  1165.           new URLSearchParams({
  1166.             photo_id: m[1],
  1167.             api_key: unsafeWindow.YUI_config.flickr.api.site_key,
  1168.             method: 'flickr.photos.getSizes',
  1169.             format: 'json',
  1170.             nojsoncallback: 1,
  1171.           }).toString()}`,
  1172.         q: text => JSON.parse(text).sizes.size.pop().source,
  1173.       },
  1174.       dotDomain.endsWith('.github.com') && {
  1175.         r: new RegExp([
  1176.           /(avatars.+?&s=)\d+/,
  1177.           /(raw\.github)(\.com\/.+?\/img\/.+)$/,
  1178.           /\/(github)(\.com\/.+?\/)blob\/([^/]+\/.+?\.(?:png|jpe?g|bmp|gif|cur|ico))$/,
  1179.         ].map(rx => rx.source).join('|')),
  1180.         s: m => `https://${
  1181.           m[1] ? `${m[1]}460` :
  1182.             m[2] ? `${m[2]}usercontent${m[3]}` :
  1183.               `raw.${m[4]}usercontent${m[5]}${m[6]}`
  1184.         }`,
  1185.       },
  1186.       isGoogleImages && {
  1187.         e: 'a[href*="imgres?imgurl="] img',
  1188.         s: (m, node) => new URLSearchParams(node.closest('a').search).get('imgurl'),
  1189.         follow: true,
  1190.       },
  1191.       isGoogleImages && {
  1192.         e: '[data-tbnid] a:not([href])',
  1193.         s: (m, a) => {
  1194.           const a2 = $('a[jsaction*="mousedown"]', a.closest('[data-tbnid]')) || a;
  1195.           new MutationObserver((_, mo) => {
  1196.             mo.disconnect();
  1197.             App.enabled = true;
  1198.             a.alt = a2.innerText;
  1199.             const {left, top} = a.getBoundingClientRect();
  1200.             Events.onMouseOver({target: $('img', a), clientX: left, clientY: top});
  1201.           }).observe(a, {attributes: true, attributeFilter: ['href']});
  1202.           a2.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
  1203.         },
  1204.       },
  1205.       dotDomain.endsWith('.instagram.com') && {
  1206.         e: [
  1207.           'a[href*="/p/"]',
  1208.           'article [role="button"][tabindex="0"], article [role="button"][tabindex="0"] div',
  1209.         ],
  1210.         s: (m, node, rule) => {
  1211.           let data, a, n, img, src;
  1212.           if (location.pathname.startsWith('/p/')) {
  1213.             img = $('img[srcset], video', node.parentNode);
  1214.             if (img && (img.localName === 'video' || parseFloat(img.sizes) > 900))
  1215.               src = (img.srcset || img.currentSrc).split(',').pop().split(' ')[0];
  1216.           }
  1217.           if (!src && (n = node.closest('a[href*="/p/"], article'))) {
  1218.             a = n.tagName === 'A' ? n : $('a[href*="/p/"]', n);
  1219.             data = a && tryCatch(this._getEdge, a.pathname.split('/')[2]);
  1220.           }
  1221.           rule.q = data && data.is_video && !data.video_url && 'meta[property="og:video"]';
  1222.           rule.g = a && $('[class*="Carousel"]', a) && rule._g;
  1223.           rule.follow = !data && !rule.g;
  1224.           rule._data = data;
  1225.           rule._img = img;
  1226.           return (
  1227.             !a && !src ? false :
  1228.               !data || rule.q || rule.g ? `${src || a.href}${rule.g ? '?__a=1' : ''}` :
  1229.                 data.video_url || data.display_url);
  1230.         },
  1231.         c: (html, doc, node, rule) =>
  1232.           tryCatch(rule._getCaption, rule._data) || (rule._img || 0).alt || '',
  1233.         anonymous: true,
  1234.         follow: true,
  1235.         _g(text, doc, url, m, rule) {
  1236.           const media = JSON.parse(text).graphql.shortcode_media;
  1237.           const items = media.edge_sidecar_to_children.edges.map(e => ({
  1238.             url: e.node.video_url || e.node.display_url,
  1239.           }));
  1240.           items.title = tryCatch(rule._getCaption, media) || '';
  1241.           return items;
  1242.         },
  1243.         _getCaption: data => data && data.edge_media_to_caption.edges[0].node.text,
  1244.         _getEdge: shortcode => unsafeWindow._sharedData.entry_data.ProfilePage[0].graphql.user
  1245.             .edge_owner_to_timeline_media.edges.find(e => e.node.shortcode === shortcode).node,
  1246.       },
  1247.       ...dotDomain.endsWith('.reddit.com') && [{
  1248.         u: '||i.reddituploads.com/',
  1249.       }, {
  1250.         e: '[data-url*="i.redd.it"] img[src*="thumb"]',
  1251.         s: (m, node) => $propUp(node, 'data-url'),
  1252.       }, {
  1253.         r: /preview(\.redd\.it\/\w+\.(jpe?g|png|gif))/,
  1254.         s: 'https://i$1',
  1255.       }] || [],
  1256.       dotDomain.endsWith('.tumblr.com') && {
  1257.         e: 'div.photo_stage_img, div.photo_stage > canvas',
  1258.         s: (m, node) => /http[^"]+/.exec(node.style.cssText + node.getAttribute('data-img-src'))[0],
  1259.         follow: true,
  1260.       },
  1261.       dotDomain.endsWith('.tweetdeck.twitter.com') && {
  1262.         e: 'a.media-item, a.js-media-image-link',
  1263.         s: (m, node) => /http[^)]+/.exec(node.style.backgroundImage)[0],
  1264.         follow: true,
  1265.       },
  1266.       dotDomain.endsWith('.twitter.com') && {
  1267.         e: '.grid-tweet > .media-overlay',
  1268.         s: (m, node) => node.previousElementSibling.src,
  1269.         follow: true,
  1270.       },
  1271.     ];
  1272.  
  1273.     const main = [
  1274.       {
  1275.         r: /[/?=](https?[^&]+)/,
  1276.         s: '$1',
  1277.         follow: true,
  1278.         onerror: 'skip',
  1279.       },
  1280.       {
  1281.         u: [
  1282.           '||500px.com/photo/',
  1283.           '||cl.ly/',
  1284.           '||cweb-pix.com/',
  1285.           '||ibb.co/',
  1286.           '||imgcredit.xyz/image/',
  1287.         ],
  1288.         r: /\.\w+\/.+/,
  1289.         q: 'meta[property="og:image"]',
  1290.       },
  1291.       {
  1292.         u: 'attachment.php',
  1293.         r: /attachment\.php.+attachmentid/,
  1294.       },
  1295.       {
  1296.         u: '||abload.de/image',
  1297.         q: '#image',
  1298.       },
  1299.       {
  1300.         u: '||deviantart.com/art/',
  1301.         s: (m, node) =>
  1302.           /\b(film|lit)/.test(node.className) || /in Flash/.test(node.title) ?
  1303.             '' :
  1304.             m.input,
  1305.         q: [
  1306.           '#download-button[href*=".jpg"]',
  1307.           '#download-button[href*=".jpeg"]',
  1308.           '#download-button[href*=".gif"]',
  1309.           '#download-button[href*=".png"]',
  1310.           '#gmi-ResViewSizer_fullimg',
  1311.           'img.dev-content-full',
  1312.         ],
  1313.       },
  1314.       {
  1315.         u: '||dropbox.com/s',
  1316.         r: /com\/sh?\/.+\.(jpe?g|gif|png)/i,
  1317.         q: (text, doc) =>
  1318.           $prop('img.absolute-center', 'src', doc).replace(/(size_mode)=\d+/, '$1=5') || false,
  1319.       },
  1320.       {
  1321.         r: /[./]ebay\.[^/]+\/itm\//,
  1322.         q: text =>
  1323.           text.match(/https?:\/\/i\.ebayimg\.com\/[^.]+\.JPG/i)[0]
  1324.             .replace(/~~60_\d+/, '~~60_57'),
  1325.       },
  1326.       {
  1327.         u: '||i.ebayimg.com/',
  1328.         s: (m, node) =>
  1329.           $('.zoom_trigger_mask', node.parentNode) ? '' :
  1330.             m.input.replace(/~~60_\d+/, '~~60_57'),
  1331.       },
  1332.       {
  1333.         u: [
  1334.           '||fastpic.ru/big',
  1335.           '||fastpic.ru/thumb',
  1336.         ],
  1337.         r: /\/\/(?:i(\d+)\.)?([^/]+\/)(big|thumb|view)\/([^.]+?)\.(\w+)/,
  1338.         s: (m, node, rule) => {
  1339.           const a = node.closest('[href*="fastpic.ru"]');
  1340.           const am = a && rule.r.exec(decodeURIComponent(a.href)) || [];
  1341.           const p = a && am[4].split('/');
  1342.           return `https://i${am[1] || m[1] || am[3] === 'view' && p[0]}.${m[2]}big/${
  1343.             am[3] === 'big' ? am[4] : m[4]}.${am[5] || m[5]}?noht=1`;
  1344.         },
  1345.         xhr: () => 'https://fastpic.ru',
  1346.       },
  1347.       {
  1348.         u: '||fastpic.ru/view/',
  1349.         q: 'img[src*="/big/"]',
  1350.         xhr: true,
  1351.       },
  1352.       {
  1353.         u: '||facebook.com/',
  1354.         r: /photo\.php|[^/]+\/photos\//,
  1355.         s: (m, node) =>
  1356.           node.id === 'fbPhotoImage' ? false :
  1357.             /gradient\.png$/.test(m.input) ? '' :
  1358.               m.input.replace('www.facebook.com', 'mbasic.facebook.com'),
  1359.         q: [
  1360.           'div + span > a:first-child:not([href*="tag_faces"])',
  1361.           'div + span > a[href*="tag_faces"] ~ a',
  1362.         ],
  1363.         rect: '#fbProfileCover',
  1364.       },
  1365.       {
  1366.         u: '||fbcdn.',
  1367.         r: /fbcdn.+?[0-9]+_([0-9]+)_[0-9]+_[a-z]\.(jpg|png)/,
  1368.         s: m =>
  1369.           dotDomain.endsWith('.facebook.com') &&
  1370.           tryCatch(() => unsafeWindow.PhotoSnowlift.getInstance().stream.cache.image[m[1]].url) ||
  1371.           false,
  1372.         manual: true,
  1373.       },
  1374.       {
  1375.         u: ['||fbcdn-', 'fbcdn.net/'],
  1376.         r: /(https?:\/\/(fbcdn-[-\w.]+akamaihd|[-\w.]+?fbcdn)\.net\/[-\w/.]+?)_[a-z]\.(jpg|png)(\?[0-9a-zA-Z0-9=_&]+)?/,
  1377.         s: (m, node) => {
  1378.           if (node.id === 'fbPhotoImage') {
  1379.             const a = $('a.fbPhotosPhotoActionsItem[href$="dl=1"]', doc.body);
  1380.             if (a) return a.href.includes(m.input.match(/[0-9]+_[0-9]+_[0-9]+/)[0]) ? '' : a.href;
  1381.           }
  1382.           if (m[4])
  1383.             return false;
  1384.           const pn = node.parentNode;
  1385.           if (pn.outerHTML.includes('/hovercard/'))
  1386.             return '';
  1387.           if (node.outerHTML.includes('profile') && pn.parentNode.href.includes('/photo'))
  1388.             return false;
  1389.           return m[1].replace(/\/[spc][\d.x]+/g, '').replace('/v/', '/') + '_n.' + m[3];
  1390.         },
  1391.         rect: '.photoWrap',
  1392.       },
  1393.       {
  1394.         u: '||flickr.com/photos/',
  1395.         r: /photos\/([0-9]+@N[0-9]+|[a-z0-9_-]+)\/([0-9]+)/,
  1396.         s: m =>
  1397.           m.input.indexOf('/sizes/') < 0 ?
  1398.             `https://www.flickr.com/photos/${m[1]}/${m[2]}/sizes/sq/` :
  1399.             false,
  1400.         q: (text, doc) => {
  1401.           const links = $$('.sizes-list a', doc);
  1402.           return 'https://www.flickr.com' + links[links.length - 1].getAttribute('href');
  1403.         },
  1404.         follow: true,
  1405.       },
  1406.       {
  1407.         u: '||flickr.com/photos/',
  1408.         r: /\/sizes\//,
  1409.         q: '#allsizes-photo > img',
  1410.       },
  1411.       {
  1412.         u: '||gfycat.com/',
  1413.         r: /(gfycat\.com\/)(gifs\/detail\/|iframe\/)?([a-z]+)/i,
  1414.         s: 'https://$1$3',
  1415.         q: [
  1416.           'meta[content$=".webm"]',
  1417.           '#webmsource',
  1418.           'source[src$=".webm"]',
  1419.         ],
  1420.       },
  1421.       {
  1422.         u: [
  1423.           '||googleusercontent.com/proxy',
  1424.           '||googleusercontent.com/gadgets/proxy',
  1425.         ],
  1426.         r: /\.com\/(proxy|gadgets\/proxy.+?(http.+?)&)/,
  1427.         s: m => m[2] ? decodeURIComponent(m[2]) : m.input.replace(/w\d+-h\d+($|-p)/, 'w0-h0'),
  1428.       },
  1429.       {
  1430.         u: [
  1431.           '||googleusercontent.com/',
  1432.           '||ggpht.com/',
  1433.         ],
  1434.         s: (m, node) =>
  1435.           m.input.includes('webcache.') ||
  1436.           node.outerHTML.match(/favicons\?|\b(Ol Rf Ep|Ol Zb ag|Zb HPb|Zb Gtb|Rf Pg|ho PQc|Uk wi hE|go wi Wh|we D0b|Bea)\b/) ||
  1437.           node.matches('.g-hovercard *, a[href*="profile_redirector"] > img') ?
  1438.             '' :
  1439.             m.input.replace(/\/s\d{2,}-[^/]+|\/w\d+-h\d+/, '/s0')
  1440.               .replace(/=[-\w]+([&#].*|$)/, ''),
  1441.       },
  1442.       {
  1443.         u: '||gravatar.com/',
  1444.         r: /([a-z0-9]{32})/,
  1445.         s: 'https://gravatar.com/avatar/$1?s=200',
  1446.       },
  1447.       {
  1448.         u: '//gyazo.com/',
  1449.         r: /\.com\/\w{32,}/,
  1450.         q: 'meta[name="twitter:image"]',
  1451.         xhr: true,
  1452.       },
  1453.       {
  1454.         u: '||hostingkartinok.com/show-image.php',
  1455.         q: '.image img',
  1456.       },
  1457.       {
  1458.         u: [
  1459.           '||imagecurl.com/images/',
  1460.           '||imagecurl.com/viewer.php',
  1461.         ],
  1462.         r: /(?:images\/(\d+)_thumb|file=(\d+))(\.\w+)/,
  1463.         s: 'https://imagecurl.com/images/$1$2$3',
  1464.       },
  1465.       {
  1466.         u: '||imagebam.com/image/',
  1467.         q: 'meta[property="og:image"]',
  1468.         tabfix: true,
  1469.         xhr: hostname.includes('planetsuzy'),
  1470.       },
  1471.       {
  1472.         u: '||imageban.ru/thumbs',
  1473.         r: /(.+?\/)thumbs(\/\d+)\.(\d+)\.(\d+\/.*)/,
  1474.         s: '$1out$2/$3/$4',
  1475.       },
  1476.       {
  1477.         u: [
  1478.           '||imageban.ru/show',
  1479.           '||imageban.net/show',
  1480.           '||ibn.im/',
  1481.         ],
  1482.         q: '#img_main',
  1483.       },
  1484.       {
  1485.         u: '||imageshack.us/img',
  1486.         r: /img(\d+)\.(imageshack\.us)\/img\\1\/\d+\/(.+?)\.th(.+)$/,
  1487.         s: 'https://$2/download/$1/$3$4',
  1488.       },
  1489.       {
  1490.         u: '||imageshack.us/i/',
  1491.         q: '#share-dl',
  1492.       },
  1493.       {
  1494.         u: '||imageteam.org/img',
  1495.         q: 'img[alt="image"]',
  1496.       },
  1497.       {
  1498.         u: [
  1499.           '||imagetwist.com/',
  1500.           '||imageshimage.com/',
  1501.         ],
  1502.         r: /(\/\/|^)[^/]+\/[a-z0-9]{8,}/,
  1503.         q: 'img.pic',
  1504.         xhr: true,
  1505.       },
  1506.       {
  1507.         u: '||imageupper.com/i/',
  1508.         q: '#img',
  1509.         xhr: true,
  1510.       },
  1511.       {
  1512.         u: '||imagevenue.com/img.php',
  1513.         q: '#thepic',
  1514.       },
  1515.       {
  1516.         u: '||imagezilla.net/show/',
  1517.         q: '#photo',
  1518.         xhr: true,
  1519.       },
  1520.       {
  1521.         u: [
  1522.           '||images-na.ssl-images-amazon.com/images/',
  1523.           '||media-imdb.com/images/',
  1524.         ],
  1525.         r: /images\/.+?\.jpg/,
  1526.         s: '/V1\\.?_.+?\\.//g',
  1527.       },
  1528.       {
  1529.         u: '||imgbox.com/',
  1530.         r: /\.com\/([a-z0-9]+)$/i,
  1531.         q: '#img',
  1532.         xhr: hostname !== 'imgbox.com',
  1533.       },
  1534.       {
  1535.         u: '||imgclick.net/',
  1536.         r: /\.net\/(\w+)/,
  1537.         q: 'img.pic',
  1538.         xhr: true,
  1539.         post: m => `op=view&id=${m[1]}&pre=1&submit=Continue%20to%20image...`,
  1540.       },
  1541.       {
  1542.         u: [
  1543.           '||imgflip.com/i/',
  1544.           '||imgflip.com/gif/',
  1545.         ],
  1546.         r: /\/(i|gif)\/([^/?#]+)/,
  1547.         s: m => `https://i.imgflip.com/${m[2]}${m[1] === 'i' ? '.jpg' : '.mp4'}`,
  1548.       },
  1549.       {
  1550.         u: [
  1551.           '||imgur.com/a/',
  1552.           '||imgur.com/gallery/',
  1553.           '||imgur.com/t/',
  1554.         ],
  1555.         g: async (text, doc, url, m, rule, cb) => {
  1556.           // simplified extraction of JSON as it occupies only one line
  1557.           if (!/(?:mergeConfig\('gallery',\s*|Imgur\.Album\.getInstance\()[\s\S]*?[,\s{"'](?:image|album)\s*:\s*({[^\r\n]+?}),?[\r\n]/.test(text))
  1558.             return;
  1559.           const info = JSON.parse(RegExp.$1);
  1560.           let images = info.is_album ? info.album_images.images : [info];
  1561.           if (info.num_images > images.length) {
  1562.             const url = `https://imgur.com/ajaxalbums/getimages/${info.hash}/hit.json?all=true`;
  1563.             images = JSON.parse((await Remoting.gmXhr(url)).responseText).data.images;
  1564.           }
  1565.           const items = [];
  1566.           for (const img of images || []) {
  1567.             const u = `https://i.imgur.com/${img.hash}`;
  1568.             items.push({
  1569.               url: img.ext === '.gif' && img.animated !== false ?
  1570.                 [`${u}.webm`, `${u}.mp4`, u] :
  1571.                 u + img.ext,
  1572.               desc: [img.title, img.description].filter(Boolean).join(' - '),
  1573.             });
  1574.           }
  1575.           if (images && info.is_album && !`${items[0].desc || ''}`.includes(info.title))
  1576.             items.title = info.title;
  1577.           cb(items);
  1578.         },
  1579.         css: '.post > .hover { display:none!important; }',
  1580.       },
  1581.       {
  1582.         u: '||imgur.com/',
  1583.         r: /((?:[a-z]{2,}\.)?imgur\.com\/)((?:\w+,)+\w*)/,
  1584.         s: 'gallery',
  1585.         g: (text, doc, url, m) =>
  1586.           m[2].split(',').map(id => ({
  1587.             url: `https://i.${m[1]}${id}.jpg`,
  1588.           })),
  1589.       },
  1590.       {
  1591.         u: '||imgur.com/',
  1592.         r: /([a-z]{2,}\.)?imgur\.com\/(r\/[a-z]+\/|[a-z0-9]+#)?([a-z0-9]{5,})($|\?|\.([a-z]+))/i,
  1593.         s: (m, node) => {
  1594.           if (/memegen|random|register|search|signin/.test(m.input))
  1595.             return '';
  1596.           const a = node.closest('a');
  1597.           if (a && a !== node && /(i\.([a-z]+\.)?)?imgur\.com\/(a\/|gallery\/)?/.test(a.href))
  1598.             return false;
  1599.           const id = m[3].replace(/(.{7})[bhm]$/, '$1');
  1600.           const ext = m[5] ? m[5].replace(/gifv?/, 'webm') : 'jpg';
  1601.           const u = `https://i.${(m[1] || '').replace('www.', '')}imgur.com/${id}.`;
  1602.           return ext === 'webm' ?
  1603.             [`${u}webm`, `${u}mp4`, `${u}gif`] :
  1604.             u + ext;
  1605.         },
  1606.       },
  1607.       {
  1608.         u: [
  1609.           '||instagr.am/p/',
  1610.           '||instagram.com/p/',
  1611.         ],
  1612.         s: m => m.input.substr(0, m.input.lastIndexOf('/')) + '/?__a=1',
  1613.         q: text => {
  1614.           const m = JSON.parse(text).graphql.shortcode_media;
  1615.           return m.video_url || m.display_url;
  1616.         },
  1617.         rect: 'div.PhotoGridMediaItem',
  1618.         c: text => {
  1619.           const m = JSON.parse(text).graphql.shortcode_media.edge_media_to_caption.edges[0];
  1620.           return m === undefined ? '(no caption)' : m.node.text;
  1621.         },
  1622.       },
  1623.       {
  1624.         u: [
  1625.           '||livememe.com/',
  1626.           '||lvme.me/',
  1627.         ],
  1628.         r: /\.\w+\/([^.]+)$/,
  1629.         s: 'http://i.lvme.me/$1.jpg',
  1630.       },
  1631.       {
  1632.         u: '||lostpic.net/image',
  1633.         q: '.image-viewer-image img',
  1634.       },
  1635.       {
  1636.         u: '||makeameme.org/meme/',
  1637.         r: /\/meme\/([^/?#]+)/,
  1638.         s: 'https://media.makeameme.org/created/$1.jpg',
  1639.       },
  1640.       {
  1641.         u: '||photobucket.com/',
  1642.         r: /(\d+\.photobucket\.com\/.+\/)(\?[a-z=&]+=)?(.+\.(jpe?g|png|gif))/,
  1643.         s: 'https://i$1$3',
  1644.         xhr: !dotDomain.endsWith('.photobucket.com'),
  1645.       },
  1646.       {
  1647.         u: '||piccy.info/view3/',
  1648.         r: /(.+?\/view3)\/(.*)\//,
  1649.         s: '$1/$2/orig/',
  1650.         q: '#mainim',
  1651.       },
  1652.       {
  1653.         u: '||pimpandhost.com/image/',
  1654.         r: /(.+?\/image\/[0-9]+)/,
  1655.         s: '$1?size=original',
  1656.         q: 'img.original',
  1657.       },
  1658.       {
  1659.         u: [
  1660.           '||pixroute.com/',
  1661.           '||imgspice.com/',
  1662.         ],
  1663.         r: /\.html$/,
  1664.         q: 'img[id]',
  1665.         xhr: true,
  1666.       },
  1667.       {
  1668.         u: '||postima',
  1669.         r: /postima?ge?\.org\/image\/\w+/,
  1670.         q: [
  1671.           'a[href*="dl="]',
  1672.           '#main-image',
  1673.         ],
  1674.       },
  1675.       {
  1676.         u: [
  1677.           '||prntscr.com/',
  1678.           '||prnt.sc/',
  1679.         ],
  1680.         r: /\.\w+\/.+/,
  1681.         q: 'meta[property="og:image"]',
  1682.         xhr: true,
  1683.       },
  1684.       {
  1685.         u: '||radikal.ru/',
  1686.         r: /\.ru\/(fp|.+\.html)/,
  1687.         q: text => text.match(/http:\/\/[a-z0-9]+\.radikal\.ru[a-z0-9/]+\.(jpg|gif|png)/i)[0],
  1688.       },
  1689.       {
  1690.         u: '||tumblr.com',
  1691.         r: /_500\.jpg/,
  1692.         s: ['/_500/_1280/', ''],
  1693.       },
  1694.       {
  1695.         u: '||twimg.com/',
  1696.         r: /\/profile_images/i,
  1697.         s: '/_(reasonably_small|normal|bigger|\\d+x\\d+)\\././g',
  1698.       },
  1699.       {
  1700.         u: '||twimg.com/media/',
  1701.         r: /.+?format=(jpe?g|png|gif)/i,
  1702.         s: '$0&name=large',
  1703.       },
  1704.       {
  1705.         u: '||twimg.com/1/proxy',
  1706.         r: /t=([^&_]+)/i,
  1707.         s: m => atob(m[1]).match(/http.+/),
  1708.       },
  1709.       {
  1710.         u: '||pic.twitter.com/',
  1711.         r: /\.com\/[a-z0-9]+/i,
  1712.         q: text => text.match(/https?:\/\/twitter\.com\/[^/]+\/status\/\d+\/photo\/\d+/i)[0],
  1713.         follow: true,
  1714.       },
  1715.       {
  1716.         u: '||twitpic.com/',
  1717.         r: /\.com(\/show\/[a-z]+)?\/([a-z0-9]+)($|#)/i,
  1718.         s: 'https://twitpic.com/show/large/$2',
  1719.       },
  1720.       {
  1721.         u: '||upix.me/files',
  1722.         s: '/#//',
  1723.       },
  1724.       {
  1725.         u: '||wiki',
  1726.         r: /\/(thumb|images)\/.+\.(jpe?g|gif|png|svg)\/(revision\/)?/i,
  1727.         s: '/\\/thumb(?=\\/)|' +
  1728.            '\\/scale-to-width(-[a-z]+)?\\/[0-9]+|' +
  1729.            '\\/revision\\/latest|\\/[^\\/]+$//g',
  1730.         xhr: !hostname.includes('wiki'),
  1731.       },
  1732.       {
  1733.         u: '||ytimg.com/vi/',
  1734.         r: /(.+?\/vi\/[^/]+)/,
  1735.         s: '$1/0.jpg',
  1736.         rect: '.video-list-item',
  1737.       },
  1738.       {
  1739.         u: '/viewer.php?file=',
  1740.         r: /(.+?)\/viewer\.php\?file=(.+)/,
  1741.         s: '$1/images/$2',
  1742.         xhr: true,
  1743.       },
  1744.       {
  1745.         u: '/thumb_',
  1746.         r: /\/albums.+\/thumb_[^/]/,
  1747.         s: '/thumb_//',
  1748.       },
  1749.       {
  1750.         u: [
  1751.           '.th.jp',
  1752.           '.th.gif',
  1753.           '.th.png',
  1754.         ],
  1755.         r: /(.+?\.)th\.(jpe?g?|gif|png|svg|webm)$/i,
  1756.         s: '$1$2',
  1757.         follow: true,
  1758.       },
  1759.       {
  1760.         r: /^[^?]+?\.(bmp|jpe?g?|gif|mp4|png|svg|web[mp])($|\?)/i,
  1761.       },
  1762.     ];
  1763.  
  1764.     /** @type mpiv.HostRule[] */
  1765.     Ruler.rules = [].concat(customRules, disablers, perDomain, main).filter(Boolean);
  1766.   },
  1767.  
  1768.   format(rule, {expand} = {}) {
  1769.     const s = JSON.stringify(rule, null, ' ');
  1770.     return expand ?
  1771.       /* {"a": ...,
  1772.           "b": ...,
  1773.           "c": ...
  1774.          } */
  1775.       s.replace(/^{\s+/g, '{') :
  1776.       /* {"a": ..., "b": ..., "c": ...} */
  1777.       s.replace(/\n\s*/g, ' ').replace(/^({)\s|\s+(})$/g, '$1$2');
  1778.   },
  1779.  
  1780.   /** @returns mpiv.HostRule | Error | false | undefined */
  1781.   parse(rule) {
  1782.     const isBatchOp = this instanceof Map;
  1783.     try {
  1784.       if (typeof rule === 'string')
  1785.         rule = JSON.parse(rule);
  1786.       if ('d' in rule && typeof rule.d !== 'string')
  1787.         rule.d = undefined;
  1788.       else if (isBatchOp && rule.d && !hostname.includes(rule.d))
  1789.         return false;
  1790.       const compileTo = isBatchOp ? rule : {};
  1791.       if (rule.r)
  1792.         compileTo.r = new RegExp(rule.r, 'i');
  1793.       if (RX_HAS_CODE.test(rule.s))
  1794.         compileTo.s = Util.newFunction('m', 'node', 'rule', rule.s);
  1795.       if (RX_HAS_CODE.test(rule.q))
  1796.         compileTo.q = Util.newFunction('text', 'doc', 'node', 'rule', rule.q);
  1797.       if (RX_HAS_CODE.test(rule.c))
  1798.         compileTo.c = Util.newFunction('text', 'doc', 'node', 'rule', rule.c);
  1799.       return rule;
  1800.     } catch (e) {
  1801.       if (!e.message.includes('unsafe-eval'))
  1802.         if (isBatchOp) {
  1803.           this.set(rule, e);
  1804.         } else {
  1805.           return e;
  1806.         }
  1807.     }
  1808.   },
  1809.  
  1810.   runC(text, doc = document) {
  1811.     const fn = Ruler.runCHandler[typeof ai.rule.c] || Ruler.runCHandler.default;
  1812.     ai.caption = fn(text, doc);
  1813.   },
  1814.  
  1815.   runCHandler: {
  1816.     function: (text, doc) => {
  1817.       // not specifying as a parameter's default value to get the html only when needed
  1818.       if (!text) text = doc.documentElement.outerHTML;
  1819.       return ai.rule.c(text, doc, ai.node, ai.rule);
  1820.     },
  1821.     string: (text, doc) => {
  1822.       const el = $many(ai.rule.c, doc);
  1823.       return !el ? '' :
  1824.         el.getAttribute('content') ||
  1825.         el.getAttribute('title') ||
  1826.         el.textContent;
  1827.     },
  1828.     default: () =>
  1829.       (ai.tooltip || 0).text ||
  1830.       ai.node.alt ||
  1831.       $propUp(ai.node, 'title') ||
  1832.       Remoting.getFileName(
  1833.         ai.node.tagName === ai.popup.tagName
  1834.           ? ai.url
  1835.           : ai.node.src || $propUp(ai.node, 'href')),
  1836.   },
  1837.  
  1838.   runQ(text, doc, docUrl) {
  1839.     let url;
  1840.     if (typeof ai.rule.q === 'function') {
  1841.       url = ai.rule.q(text, doc, ai.node, ai.rule);
  1842.       if (Array.isArray(url)) {
  1843.         ai.urls = url.slice(1);
  1844.         url = url[0];
  1845.       }
  1846.     } else {
  1847.       const el = $many(ai.rule.q, doc);
  1848.       url = el && Remoting.findImageUrl(el, docUrl);
  1849.     }
  1850.     return url;
  1851.   },
  1852.  
  1853.   runS(node, rule, m) {
  1854.     let urls = [];
  1855.     for (const s of ensureArray(rule.s))
  1856.       urls.push(
  1857.         typeof s === 'string' ? Util.decodeUrl(Ruler.substituteSingle(s, m)) :
  1858.           typeof s === 'function' ? s(m, node, rule) :
  1859.             s);
  1860.     if (rule.q && urls.length > 1) {
  1861.       console.warn('Rule discarded: "s" array is not allowed with "q"\n%o', rule);
  1862.       return {skipRule: true};
  1863.     }
  1864.     if (Array.isArray(urls[0]))
  1865.       urls = urls[0];
  1866.     // `false` returned by "s" property means "skip this rule"
  1867.     // any other falsy value (like say "") means "stop all rules"
  1868.     return urls[0] === false ? {skipRule: true} : urls.map(Util.decodeUrl);
  1869.   },
  1870.  
  1871.   substituteSingle(s, m) {
  1872.     if (!m) return s;
  1873.     if (s.startsWith('/') && !s.startsWith('//')) {
  1874.       const mid = s.search(/[^\\]\//) + 1;
  1875.       const end = s.lastIndexOf('/');
  1876.       const re = new RegExp(s.slice(1, mid), s.slice(end + 1));
  1877.       return m.input.replace(re, s.slice(mid + 1, end));
  1878.     }
  1879.     if (m.length && s.includes('$')) {
  1880.       const maxLength = Math.floor(Math.log10(m.length)) + 1;
  1881.       s = s.replace(/\$(\d{1,3})/g, (text, num) => {
  1882.         for (let i = maxLength; i >= 0; i--) {
  1883.           const part = num.slice(0, i) | 0;
  1884.           if (part < m.length)
  1885.             return (m[part] || '') + num.slice(i);
  1886.         }
  1887.         return text;
  1888.       });
  1889.     }
  1890.     return s;
  1891.   },
  1892. };
  1893.  
  1894. const RuleMatcher = {
  1895.  
  1896.   /** @returns ?mpiv.RuleMatchInfo */
  1897.   findForLink(a) {
  1898.     let url =
  1899.       a.getAttribute('data-expanded-url') ||
  1900.       a.getAttribute('data-full-url') ||
  1901.       a.getAttribute('data-url') ||
  1902.       a.href;
  1903.     if (url.startsWith('data:'))
  1904.       url = false;
  1905.     else if (url.includes('//t.co/'))
  1906.       url = 'http://' + a.textContent;
  1907.     return RuleMatcher.find(url, a);
  1908.   },
  1909.  
  1910.   /** @returns ?mpiv.RuleMatchInfo */
  1911.   find(url, node, {noHtml, skipRules} = {}) {
  1912.     const tn = node.tagName;
  1913.     const isPic = tn === 'IMG' || tn === 'VIDEO';
  1914.     const isPicOrLink = isPic || tn === 'A';
  1915.     let m, html, urls;
  1916.     for (const rule of Ruler.rules) {
  1917.       const {e} = rule;
  1918.       if (e && !node.matches(e) || skipRules && skipRules.includes(rule))
  1919.         continue;
  1920.       const {r, u} = rule;
  1921.       if (r && !noHtml && rule.html && (isPicOrLink || e))
  1922.         m = r.exec(html || (html = node.outerHTML));
  1923.       else if (r || u)
  1924.         m = url && RuleMatcher.makeUrlMatch(url, node, rule, r, u);
  1925.       else
  1926.         m = url ? RuleMatcher.makeDummyMatch(url) : [];
  1927.       if (!m)
  1928.         continue;
  1929.       const {s} = rule;
  1930.       let hasS = s !== undefined;
  1931.       // a rule with follow:true for the currently hovered IMG produced a URL,
  1932.       // but we'll only allow it to match rules without 's' in the nested find call
  1933.       if (isPic && !hasS && !skipRules)
  1934.         continue;
  1935.       if (s === '')
  1936.         return {};
  1937.       hasS &= s !== 'gallery';
  1938.       urls = hasS ? Ruler.runS(node, rule, m) : [m.input];
  1939.       if (!urls.skipRule) {
  1940.         const url = urls[0];
  1941.         return !url ? {} :
  1942.           hasS && !rule.q && RuleMatcher.isFollowableUrl(url, rule) &&
  1943.             RuleMatcher.find(url, node, {skipRules: [...skipRules || [], rule]}) ||
  1944.             RuleMatcher.makeInfo(urls, node, rule, m);
  1945.       }
  1946.     }
  1947.   },
  1948.  
  1949.   makeUrlMatch(url, node, rule, r, u) {
  1950.     let m;
  1951.     if (u) {
  1952.       u = rule._u || (rule._u = UrlMatcher(u));
  1953.       m = u.fn.call(u.this, url) && (r || RuleMatcher.makeDummyMatch(url));
  1954.     }
  1955.     return (m || !u) && r ? r.exec(url) : m;
  1956.   },
  1957.  
  1958.   makeDummyMatch(url) {
  1959.     const m = [url];
  1960.     m.index = 0;
  1961.     m.input = url;
  1962.     return m;
  1963.   },
  1964.  
  1965.   /** @returns mpiv.RuleMatchInfo */
  1966.   makeInfo(urls, node, rule, m) {
  1967.     const url = urls[0];
  1968.     const xhr = cfg.xhr && rule.xhr;
  1969.     const info = {
  1970.       node,
  1971.       rule,
  1972.       url,
  1973.       urls: urls.length > 1 ? urls.slice(1) : null,
  1974.       match: m,
  1975.       gallery: rule.g && Gallery.makeParser(rule.g),
  1976.       post: typeof rule.post === 'function' ? rule.post(m) : rule.post,
  1977.       xhr: xhr != null ? xhr : isSecureContext && !`${url}`.startsWith(location.protocol),
  1978.     };
  1979.     if (
  1980.       dotDomain.endsWith('.twitter.com') && !/(facebook|google|twimg|twitter)\.com\//.test(url) ||
  1981.       dotDomain.endsWith('.github.com') && !/github/.test(url) ||
  1982.       dotDomain.endsWith('.facebook.com') && /\bimgur\.com/.test(url)
  1983.     ) {
  1984.       info.xhr = 'data';
  1985.     }
  1986.     return info;
  1987.   },
  1988.  
  1989.   isFollowableUrl(url, rule) {
  1990.     const f = rule.follow;
  1991.     return typeof f === 'function' ? f(url) : f;
  1992.   },
  1993. };
  1994.  
  1995. const Remoting = {
  1996.  
  1997.   gmXhr(url, opts = {}) {
  1998.     if (ai.req)
  1999.       tryCatch.call(ai.req, ai.req.abort);
  2000.     return new Promise((resolve, reject) => {
  2001.       ai.req = GM_xmlhttpRequest({
  2002.         url,
  2003.         method: 'GET',
  2004.         anonymous: (ai.rule || {}).anonymous,
  2005.         timeout: 30e3,
  2006.         ...opts,
  2007.         onload: done,
  2008.         onerror: done,
  2009.         ontimeout() {
  2010.           ai.req = null;
  2011.           reject(`Timeout fetching ${url}`);
  2012.         },
  2013.       });
  2014.       function done(r) {
  2015.         ai.req = null;
  2016.         if (r.status < 400 && !r.error)
  2017.           resolve(r);
  2018.         else
  2019.           reject(`Server error ${r.status} ${r.error}\nURL: ${url}`);
  2020.       }
  2021.     });
  2022.   },
  2023.  
  2024.   async getDoc(url) {
  2025.     const r = await (!ai.post ?
  2026.       Remoting.gmXhr(url) :
  2027.       Remoting.gmXhr(url, {
  2028.         method: 'POST',
  2029.         data: ai.post,
  2030.         headers: {
  2031.           'Content-Type': 'application/x-www-form-urlencoded',
  2032.           'Referer': url,
  2033.         },
  2034.       }));
  2035.     r.doc = new DOMParser().parseFromString(r.responseText, 'text/html');
  2036.     return r;
  2037.   },
  2038.  
  2039.   async getImage(url, pageUrl) {
  2040.     ai.bufBar = false;
  2041.     ai.bufStart = now();
  2042.     const response = await Remoting.gmXhr(url, {
  2043.       responseType: 'blob',
  2044.       headers: {
  2045.         Accept: 'image/png,image/*;q=0.8,*/*;q=0.5',
  2046.         Referer: pageUrl || (typeof ai.xhr === 'function' ? ai.xhr() : url),
  2047.       },
  2048.       onprogress: Remoting.getImageProgress,
  2049.     });
  2050.     Bar.set(false);
  2051.     const type = Remoting.guessMimeType(response);
  2052.     let b = response.response;
  2053.     if (!b) throw 'Empty response';
  2054.     if (b.type !== type)
  2055.       b = b.slice(0, b.size, type);
  2056.     return ai.xhr === 'data' ?
  2057.       Remoting.blobToDataUrl(b) :
  2058.       URL.createObjectURL(b);
  2059.   },
  2060.  
  2061.   getImageProgress(e) {
  2062.     if (!ai.bufBar && now() - ai.bufStart > 3000 && e.loaded / e.total < 0.5)
  2063.       ai.bufBar = true;
  2064.     if (ai.bufBar) {
  2065.       const pct = e.loaded / e.total * 100 | 0;
  2066.       const size = e.total / 1024 | 0;
  2067.       Bar.set(`${pct}% of ${size} kiB`, 'xhr');
  2068.     }
  2069.   },
  2070.  
  2071.   async findRedirect() {
  2072.     try {
  2073.       const {finalUrl} = await Remoting.gmXhr(ai.url, {
  2074.         method: 'HEAD',
  2075.         headers: {
  2076.           'Referer': location.href.split('#', 1)[0],
  2077.         },
  2078.       });
  2079.       const info = RuleMatcher.find(finalUrl, ai.node, {noHtml: true});
  2080.       if (!info || !info.url)
  2081.         throw `Couldn't follow redirection target: ${finalUrl}`;
  2082.       Object.assign(ai, info);
  2083.       App.startSingle();
  2084.     } catch (e) {
  2085.       App.handleError(e);
  2086.     }
  2087.   },
  2088.  
  2089.   async saveFile() {
  2090.     const url = ai.popup.src || ai.popup.currentSrc;
  2091.     let name = Remoting.getFileName(ai.imageUrl || url);
  2092.     if (!name.includes('.'))
  2093.       name += '.jpg';
  2094.     if (url.startsWith('blob:') || url.startsWith('data:')) {
  2095.       $create('a', {href: url, download: name})
  2096.         .dispatchEvent(new MouseEvent('click'));
  2097.     } else {
  2098.       Status.set('+loading');
  2099.       const onload = () => Status.set('-loading');
  2100.       GM_download({
  2101.         url,
  2102.         name,
  2103.         headers: {Referer: url},
  2104.         onerror: e => {
  2105.           Bar.set(`Could not download ${name}: ${e.error || e.message || e}.`, 'error');
  2106.           onload();
  2107.         },
  2108.         onprogress: Remoting.getImageProgress,
  2109.         onload,
  2110.       });
  2111.     }
  2112.   },
  2113.  
  2114.   getFileName(url) {
  2115.     return decodeURIComponent(url).split('/').pop().replace(/[:#?].*/, '');
  2116.   },
  2117.  
  2118.   blobToDataUrl(blob) {
  2119.     return new Promise((resolve, reject) => {
  2120.       const fr = new FileReader();
  2121.       fr.onload = () => resolve(fr.result);
  2122.       fr.onerror = reject;
  2123.       fr.readAsDataURL(blob);
  2124.     });
  2125.   },
  2126.  
  2127.   guessMimeType({responseHeaders, finalUrl}) {
  2128.     if (/Content-Type:\s*(\S+)/i.test(responseHeaders) &&
  2129.         !RegExp.$1.includes('text/plain'))
  2130.       return RegExp.$1;
  2131.     const ext = /\.([a-z0-9]+?)($|\?|#)/i.exec(finalUrl) ? RegExp.$1 : 'jpg';
  2132.     switch (ext.toLowerCase()) {
  2133.       case 'bmp': return 'image/bmp';
  2134.       case 'gif': return 'image/gif';
  2135.       case 'jpe': return 'image/jpeg';
  2136.       case 'jpeg': return 'image/jpeg';
  2137.       case 'jpg': return 'image/jpeg';
  2138.       case 'mp4': return 'video/mp4';
  2139.       case 'png': return 'image/png';
  2140.       case 'svg': return 'image/svg+xml';
  2141.       case 'tif': return 'image/tiff';
  2142.       case 'tiff': return 'image/tiff';
  2143.       case 'webm': return 'video/webm';
  2144.       default: return 'application/octet-stream';
  2145.     }
  2146.   },
  2147.  
  2148.   findImageUrl(n, url) {
  2149.     let html;
  2150.     const path =
  2151.       n.getAttribute('src') ||
  2152.       n.getAttribute('data-m4v') ||
  2153.       n.getAttribute('href') ||
  2154.       n.getAttribute('content') ||
  2155.       (html = n.outerHTML).includes('http') &&
  2156.       html.match(/https?:\/\/[^\s"<>]+?\.(jpe?g|gif|png|svg|web[mp]|mp4)[^\s"<>]*|$/i)[0];
  2157.     return !!path && Util.rel2abs(Util.decodeHtmlEntities(path),
  2158.       $prop('base[href]', 'href', n.ownerDocument) || url);
  2159.   },
  2160. };
  2161.  
  2162. const Status = {
  2163.  
  2164.   set(status) {
  2165.     if (!status && !cfg.globalStatus) {
  2166.       ai.node && ai.node.removeAttribute(STATUS_ATTR);
  2167.       return;
  2168.     }
  2169.     const prefix = cfg.globalStatus ? PREFIX : '';
  2170.     const action = status && /^[+-]/.test(status) && status[0];
  2171.     const name = status && `${prefix}${action ? status.slice(1) : status}`;
  2172.     const el = cfg.globalStatus ? doc.documentElement :
  2173.       name === 'edge' ? ai.popup :
  2174.         ai.node;
  2175.     if (!el) return;
  2176.     const attr = cfg.globalStatus ? 'class' : STATUS_ATTR;
  2177.     const oldValue = (el.getAttribute(attr) || '').trim();
  2178.     const cls = new Set(oldValue ? oldValue.split(/\s+/) : []);
  2179.     switch (action) {
  2180.       case '-':
  2181.         cls.delete(name);
  2182.         break;
  2183.       case false:
  2184.         for (const c of cls)
  2185.           if (c.startsWith(prefix) && c !== name)
  2186.             cls.delete(c);
  2187.       // fallthrough to +
  2188.       case '+':
  2189.         if (name)
  2190.           cls.add(name);
  2191.         break;
  2192.     }
  2193.     const newValue = [...cls].join(' ');
  2194.     if (newValue !== oldValue)
  2195.       el.setAttribute(attr, newValue);
  2196.   },
  2197.  
  2198.   loading(force) {
  2199.     if (!force) {
  2200.       clearTimeout(ai.timerStatus);
  2201.       ai.timerStatus = setTimeout(Status.loading, SETTLE_TIME, true);
  2202.     } else if (!ai.popupLoaded) {
  2203.       Status.set('+loading');
  2204.     }
  2205.   },
  2206. };
  2207.  
  2208. const UrlMatcher = (() => {
  2209.   // string-to-regexp escaped chars
  2210.   const RX_ESCAPE = /[.+*?(){}[\]^$|]/g;
  2211.   // rx for '^' symbol in simple url match
  2212.   const RX_SEP = /[^\w%._-]/y;
  2213.   const RXS_SEP = RX_SEP.source;
  2214.   return match => {
  2215.     const results = [];
  2216.     for (const s of ensureArray(match)) {
  2217.       const pinDomain = s.startsWith('||');
  2218.       const pinStart = !pinDomain && s.startsWith('|');
  2219.       const endSep = s.endsWith('^');
  2220.       let fn;
  2221.       let needle = s.slice(pinDomain * 2 + pinStart, -endSep || undefined);
  2222.       if (needle.includes('^')) {
  2223.         const plain = needle.split('^').reduce(getLongest);
  2224.         const rx = new RegExp(
  2225.           (pinStart ? '^' : '') +
  2226.           (pinDomain ? '^(([^/:]+:)?//)?([^./]*\\.)*?' : '') +
  2227.           needle.replace(RX_ESCAPE, '\\$&').replace(/\\\^/g, RXS_SEP) +
  2228.           (endSep ? `(?:${RXS_SEP}|$)` : ''), 'i');
  2229.         needle = [plain, rx];
  2230.         fn = regexp;
  2231.       } else if (pinStart) {
  2232.         fn = endSep ? equals : starts;
  2233.       } else if (pinDomain) {
  2234.         const slashPos = needle.indexOf('/');
  2235.         const domain = slashPos > 0 ? needle.slice(0, slashPos) : needle;
  2236.         needle = [needle, domain, slashPos > 0, endSep];
  2237.         fn = startsDomainPrescreen;
  2238.       } else if (endSep) {
  2239.         fn = ends;
  2240.       } else {
  2241.         fn = has;
  2242.       }
  2243.       results.push({fn, this: needle});
  2244.     }
  2245.     return results.length > 1 ?
  2246.       {fn: checkArray, this: results} :
  2247.       results[0];
  2248.   };
  2249.   function checkArray(s) {
  2250.     return this.some(checkArrayItem, s);
  2251.   }
  2252.   function checkArrayItem(item) {
  2253.     return item.fn.call(item.this, this);
  2254.   }
  2255.   function ends(s) {
  2256.     return s.endsWith(this) || (
  2257.       s.length > this.length &&
  2258.       s.indexOf(this, s.length - this.length - 1) >= 0 &&
  2259.       endsWithSep(s));
  2260.   }
  2261.   function endsWithSep(s, pos = s.length - 1) {
  2262.     RX_SEP.lastIndex = pos;
  2263.     return RX_SEP.test(s);
  2264.   }
  2265.   function equals(s) {
  2266.     return s.startsWith(this) && (
  2267.       s.length === this.length ||
  2268.       s.length === this.length + 1 && endsWithSep(s));
  2269.   }
  2270.   function getLongest(max, part) {
  2271.     return part.length > max.length ? part : max;
  2272.   }
  2273.   function has(s) {
  2274.     return s.includes(this);
  2275.   }
  2276.   function regexp(s) {
  2277.     return s.includes(this[0]) && this[1].test(s);
  2278.   }
  2279.   function starts(s) {
  2280.     return s.startsWith(this);
  2281.   }
  2282.   function startsDomainPrescreen(url) {
  2283.     return url.includes(this[0]) && startsDomain.call(this, url);
  2284.   }
  2285.   function startsDomain(url) {
  2286.     let hostStart = url.indexOf('//');
  2287.     if (hostStart && url[hostStart - 1] !== ':')
  2288.       return;
  2289.     hostStart = hostStart < 0 ? 0 : hostStart + 2;
  2290.     const host = url.slice(hostStart, (url.indexOf('/', hostStart) + 1 || url.length + 1) - 1);
  2291.     const [needle, domain, pinDomainEnd, endSep] = this;
  2292.     let start = pinDomainEnd ? host.length - domain.length : 0;
  2293.     for (; ; start++) {
  2294.       start = host.indexOf(domain, start);
  2295.       if (start < 0)
  2296.         return;
  2297.       if (!start || host[start - 1] === '.')
  2298.         break;
  2299.     }
  2300.     start += hostStart;
  2301.     if (url.lastIndexOf(needle, start) !== start)
  2302.       return;
  2303.     const end = start + needle.length;
  2304.     return !endSep || end === host.length || end === url.length || endsWithSep(url, end);
  2305.   }
  2306. })();
  2307.  
  2308. const Util = {
  2309.  
  2310.   addStyle(name, css) {
  2311.     const id = `${PREFIX}style:${name}`;
  2312.     const el = doc.getElementById(id) ||
  2313.                css && $create('style', {id});
  2314.     if (!el) return;
  2315.     if (el.textContent !== css)
  2316.       el.textContent = css;
  2317.     if (el.parentElement !== doc.head)
  2318.       doc.head.appendChild(el);
  2319.     return el;
  2320.   },
  2321.  
  2322.   color(color, opacity = cfg[`ui${color}Opacity`]) {
  2323.     return (color.startsWith('#') ? color : cfg[`ui${color}Color`]) +
  2324.            (0x100 + Math.round(opacity / 100 * 255)).toString(16).slice(1);
  2325.   },
  2326.  
  2327.   decodeHtmlEntities(s) {
  2328.     return s
  2329.       .replace(/&quot;/g, '"')
  2330.       .replace(/&apos;/g, '\'')
  2331.       .replace(/&lt;/g, '<')
  2332.       .replace(/&gt;/g, '>')
  2333.       .replace(/&amp;/g, '&');
  2334.   },
  2335.  
  2336.   // decode only if the main part of the URL is encoded to preserve the encoded parameters
  2337.   decodeUrl(url) {
  2338.     if (!url) return url;
  2339.     const iPct = url.indexOf('%');
  2340.     const iColon = url.indexOf(':');
  2341.     return iPct >= 0 && (iPct < iColon || iColon < 0) ?
  2342.       decodeURIComponent(url) :
  2343.       url;
  2344.   },
  2345.  
  2346.   deepEqual(a, b) {
  2347.     if (!a || !b || typeof a !== 'object' || typeof a !== typeof b)
  2348.       return a === b;
  2349.     if (Array.isArray(a)) {
  2350.       return Array.isArray(b) &&
  2351.         a.length === b.length &&
  2352.         a.every((v, i) => Util.deepEqual(v, b[i]));
  2353.     }
  2354.     const keys = Object.keys(a);
  2355.     return keys.length === Object.keys(b).length &&
  2356.       keys.every(k => Util.deepEqual(a[k], b[k]));
  2357.   },
  2358.  
  2359.   forceLayout(node) {
  2360.     // eslint-disable-next-line no-unused-expressions
  2361.     node.clientHeight;
  2362.   },
  2363.  
  2364.   formatError(e, rule) {
  2365.     const message =
  2366.       e.message ||
  2367.       e.readyState && 'Request failed.' ||
  2368.       e.type === 'error' && `File can't be displayed.${
  2369.         $('div[bgactive*="flashblock"]', doc) ? ' Check Flashblock settings.' : ''
  2370.       }` ||
  2371.       e;
  2372.     const m = [
  2373.       [`${GM_info.script.name}: %c${message}%c`, 'font-weight:bold;color:yellow'],
  2374.       ['', 'font-weight:normal;color:unset'],
  2375.     ];
  2376.     m.push(...[
  2377.       ['Node: %o', ai.node],
  2378.       ['Rule: %o', rule],
  2379.       ai.url && ['URL: %s', ai.url],
  2380.       ai.imageUrl && ai.imageUrl !== ai.url && ['File: %s', ai.imageUrl],
  2381.     ].filter(Boolean));
  2382.     return {
  2383.       message,
  2384.       consoleFormat: m.map(([k]) => k).filter(Boolean).join('\n'),
  2385.       consoleArgs: m.map(([, v]) => v),
  2386.     };
  2387.   },
  2388.  
  2389.   isVideoUrl(url) {
  2390.     return url.startsWith('data:video') ||
  2391.            !url.startsWith('data:') && /\.(webm|mp4)($|\?)/.test(url);
  2392.   },
  2393.  
  2394.   newFunction(...args) {
  2395.     try {
  2396.       return App.NOP || new Function(...args);
  2397.     } catch (e) {
  2398.       if (!e.message.includes('unsafe-eval'))
  2399.         throw e;
  2400.       App.NOP = () => {};
  2401.       return App.NOP;
  2402.     }
  2403.   },
  2404.  
  2405.   rel2abs(rel, abs = location.href) {
  2406.     try {
  2407.       return rel.startsWith('data:') ? rel :
  2408.         rel.startsWith('blob:') ? '' : // blobs don't work because they're usually revoked
  2409.           new URL(rel, abs).href;
  2410.     } catch (e) {
  2411.       return rel;
  2412.     }
  2413.   },
  2414.  
  2415.   suppressTooltip() {
  2416.     for (const node of [
  2417.       ai.node.parentNode,
  2418.       ai.node,
  2419.       ai.node.firstElementChild,
  2420.     ]) {
  2421.       const t = (node || 0).title;
  2422.       if (t && t !== node.textContent && !doc.title.includes(t) && !/^https?:\S+$/.test(t)) {
  2423.         ai.tooltip = {node, text: t};
  2424.         node.title = '';
  2425.         break;
  2426.       }
  2427.     }
  2428.   },
  2429.  
  2430.   tabFixUrl() {
  2431.     return ai.rule.tabfix && ai.popup.tagName === 'IMG' && !ai.xhr &&
  2432.            navigator.userAgent.includes('Gecko/') &&
  2433.            flattenHtml(`data:text/html;charset=utf8,
  2434.       <style>
  2435.         body {
  2436.           margin: 0;
  2437.           padding: 0;
  2438.           background: #222;
  2439.         }
  2440.         .fit {
  2441.           overflow: hidden
  2442.         }
  2443.         .fit > img {
  2444.           max-width: 100vw;
  2445.           max-height: 100vh;
  2446.         }
  2447.         body > img {
  2448.           margin: auto;
  2449.           position: absolute;
  2450.           left: 0;
  2451.           right: 0;
  2452.           top: 0;
  2453.           bottom: 0;
  2454.         }
  2455.       </style>
  2456.       <body class=fit>
  2457.         <img onclick="document.body.classList.toggle('fit')" src="${ai.popup.src}">
  2458.       </body>
  2459.     `).replace(/#/g, '%23');
  2460.   },
  2461. };
  2462.  
  2463. function setup({rule} = {}) {
  2464.   if (window !== top) return;
  2465.   const RULE = setup.RULE || (setup.RULE = Symbol('rule'));
  2466.   // FF is superslow with textareas, bugzil.la/190147
  2467.   let root = (elConfig || 0).shadowRoot;
  2468.   let {blankRuleElement} = setup;
  2469.   /** @type NodeList */
  2470.   const UI = new Proxy({}, {
  2471.     get(_, id) {
  2472.       return root.getElementById(id);
  2473.     },
  2474.   });
  2475.   if (!rule || !elConfig)
  2476.     init(new Config({save: true}));
  2477.   if (rule)
  2478.     installRule(rule);
  2479.  
  2480.   function closeSetup(event) {
  2481.     const isApply = this.id === 'apply';
  2482.     if (event && (this.id === 'ok' || isApply)) {
  2483.       cfg = collectConfig({save: true, clone: isApply});
  2484.       Ruler.init();
  2485.       if (isApply) {
  2486.         renderCustomScales(cfg);
  2487.         return;
  2488.       }
  2489.     }
  2490.     $remove(elConfig);
  2491.     elConfig = null;
  2492.   }
  2493.  
  2494.   function collectConfig({save, clone} = {}) {
  2495.     let data = {};
  2496.     for (const el of $$('input[id], select[id]', root))
  2497.       data[el.id] = el.type === 'checkbox' ? el.checked :
  2498.         (el.type === 'number' || el.type === 'range') ? el.valueAsNumber :
  2499.           el.value || '';
  2500.     Object.assign(data, {
  2501.       css: UI.css.value.trim(),
  2502.       delay: UI.delay.valueAsNumber * 1000,
  2503.       hosts: collectRules(),
  2504.       scale: clamp(UI.scale.valueAsNumber / 100, 0, 1) + 1,
  2505.       scales: UI.scales.value
  2506.         .trim()
  2507.         .split(/[,;]*\s+/)
  2508.         .map(x => x.replace(',', '.'))
  2509.         .filter(x => !isNaN(parseFloat(x))),
  2510.     });
  2511.     if (clone)
  2512.       data = JSON.parse(JSON.stringify(data));
  2513.     return new Config({data, save});
  2514.   }
  2515.  
  2516.   function collectRules() {
  2517.     return [...UI.rules.children]
  2518.       .map(el => [el.value.trim(), el[RULE]])
  2519.       .sort((a, b) => a[0] < b[0] ? -1 : a[0] > b[0] ? 1 : 0)
  2520.       .map(([s, json]) => json || s)
  2521.       .filter(Boolean);
  2522.   }
  2523.  
  2524.   function exportSettings(e) {
  2525.     dropEvent(e);
  2526.     const txt = $create('textarea', {
  2527.       style: 'opacity:0; position:absolute',
  2528.       value: JSON.stringify(collectConfig(), null, '  '),
  2529.     });
  2530.     root.appendChild(txt);
  2531.     txt.select();
  2532.     txt.focus();
  2533.     document.execCommand('copy');
  2534.     e.target.focus();
  2535.     txt.remove();
  2536.     UI.exportNotification.hidden = false;
  2537.     setTimeout(() => (UI.exportNotification.hidden = true), 1000);
  2538.   }
  2539.  
  2540.   function importSettings(e) {
  2541.     dropEvent(e);
  2542.     const s = prompt('Paste settings:');
  2543.     if (s)
  2544.       init(new Config({data: s}));
  2545.   }
  2546.  
  2547.   function checkRule({target: el}) {
  2548.     let json, error, title;
  2549.     const prev = el.previousElementSibling;
  2550.     if (el.value) {
  2551.       json = Ruler.parse(el.value);
  2552.       error = json instanceof Error && (json.message || String(json));
  2553.       const invalidDomain = !error && json && typeof json.d === 'string' &&
  2554.         !/^[-.a-z0-9]*$/i.test(json.d);
  2555.       title = [invalidDomain && 'Disabled due to invalid characters in "d"', error]
  2556.         .filter(Boolean).join('\n');
  2557.       el.classList.toggle('invalid-domain', invalidDomain);
  2558.       if (!prev)
  2559.         el.insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2560.     } else if (prev) {
  2561.       prev.focus();
  2562.       el.remove();
  2563.     }
  2564.     el[RULE] = !error && json;
  2565.     el.title = title;
  2566.     el.setCustomValidity(error || '');
  2567.   }
  2568.  
  2569.   function focusRule({type, target: el, relatedTarget: from}) {
  2570.     if (el === this)
  2571.       return;
  2572.     if (type === 'paste') {
  2573.       setTimeout(() => focusRule.call(this, {target: el}));
  2574.       return;
  2575.     }
  2576.     if (el[RULE])
  2577.       el.value = Ruler.format(el[RULE], {expand: true});
  2578.     const h = clamp(el.scrollHeight, 15, elConfig.clientHeight / 4);
  2579.     if (h > el.offsetHeight)
  2580.       el.style.minHeight = h + 'px';
  2581.     if (!this.contains(from))
  2582.       from = [...$$('[style*="height"]', this)].find(_ => _ !== el);
  2583.     if (from) {
  2584.       from.style.minHeight = '';
  2585.       if (from[RULE])
  2586.         from.value = Ruler.format(from[RULE]);
  2587.     }
  2588.   }
  2589.  
  2590.   function installRule(rule) {
  2591.     const inputs = UI.rules.children;
  2592.     let el = [...inputs].find(el => Util.deepEqual(el[RULE], rule));
  2593.     if (!el) {
  2594.       el = inputs[0];
  2595.       el[RULE] = rule;
  2596.       el.value = Ruler.format(rule);
  2597.       el.hidden = false;
  2598.       const i = Math.max(0, collectRules().indexOf(rule));
  2599.       inputs[i].insertAdjacentElement('afterend', el);
  2600.       inputs[0].insertAdjacentElement('beforebegin', blankRuleElement.cloneNode());
  2601.     }
  2602.     const rect = el.getBoundingClientRect();
  2603.     if (rect.bottom < 0 ||
  2604.         rect.bottom > el.parentNode.offsetHeight)
  2605.       el.scrollIntoView();
  2606.     el.classList.add('highlight');
  2607.     el.addEventListener('animationend', () => el.classList.remove('highlight'), {once: true});
  2608.     el.focus();
  2609.   }
  2610.  
  2611.   function init(config) {
  2612.     $remove(elConfig);
  2613.     elConfig = $create('div', {contentEditable: true});
  2614.     root = elConfig.attachShadow({mode: 'open'});
  2615.     root.innerHTML = createConfigHtml();
  2616.     initEvents();
  2617.     renderValues(config);
  2618.     renderCustomScales(config);
  2619.     initRules(config);
  2620.     doc.body.appendChild(elConfig);
  2621.     requestAnimationFrame(() => {
  2622.       UI.css.style.minHeight = clamp(UI.css.scrollHeight, 40, elConfig.clientHeight / 4) + 'px';
  2623.     });
  2624.   }
  2625.  
  2626.   function initEvents() {
  2627.     UI.apply.onclick = UI.cancel.onclick = UI.ok.onclick = UI.x.onclick = closeSetup;
  2628.     UI.export.onclick = exportSettings;
  2629.     UI.import.onclick = importSettings;
  2630.     UI.install.onclick = setupRuleInstaller;
  2631.     const {/** @type {HTMLTextAreaElement} */ cssApp} = UI;
  2632.     UI.reveal.onclick = e => {
  2633.       e.preventDefault();
  2634.       cssApp.hidden = !cssApp.hidden;
  2635.       if (!cssApp.hidden) {
  2636.         if (!cssApp.value) {
  2637.           App.updateStyles();
  2638.           cssApp.value = App.globalStyle.trim();
  2639.           cssApp.setSelectionRange(0, 0);
  2640.         }
  2641.         cssApp.focus();
  2642.       }
  2643.     };
  2644.     UI.start.onchange = function () {
  2645.       UI.delay.closest('label').hidden =
  2646.         UI.preload.closest('label').hidden =
  2647.           this.value !== 'auto';
  2648.     };
  2649.     UI.start.onchange();
  2650.     UI.xhr.onclick = ({target: el}) => el.checked || confirm($propUp(el, 'title'));
  2651.     // color
  2652.     for (const el of $$('[type="color"]', root)) {
  2653.       el.oninput = colorOnInput;
  2654.       el.elSwatch = el.nextElementSibling;
  2655.       el.elOpacity = UI[el.id.replace('Color', 'Opacity')];
  2656.       el.elOpacity.elColor = el;
  2657.     }
  2658.     function colorOnInput() {
  2659.       this.elSwatch.style.setProperty('--color',
  2660.         Util.color(this.value, this.elOpacity.valueAsNumber));
  2661.     }
  2662.     // range
  2663.     for (const el of $$('[type="range"]', root)) {
  2664.       el.oninput = rangeOnInput;
  2665.       el.onblur = rangeOnBlur;
  2666.       el.addEventListener('focusin', rangeOnFocus);
  2667.     }
  2668.     function rangeOnBlur(e) {
  2669.       if (this.elEdit && e.relatedTarget !== this.elEdit)
  2670.         this.elEdit.onblur(e);
  2671.     }
  2672.     function rangeOnFocus() {
  2673.       if (this.elEdit) return;
  2674.       const {min, max, step, value} = this;
  2675.       this.elEdit = $create('input', {
  2676.         value, min, max, step,
  2677.         className: 'range-edit',
  2678.         style: `left: ${this.offsetLeft}px; margin-top: ${this.offsetHeight + 1}px`,
  2679.         type: 'number',
  2680.         elRange: this,
  2681.         onblur: rangeEditOnBlur,
  2682.         oninput: rangeEditOnInput,
  2683.       });
  2684.       this.insertAdjacentElement('afterend', this.elEdit);
  2685.     }
  2686.     function rangeOnInput() {
  2687.       this.title = (this.dataset.title || '').replace('$', this.value);
  2688.       if (this.elColor) this.elColor.oninput();
  2689.       if (this.elEdit) this.elEdit.valueAsNumber = this.valueAsNumber;
  2690.     }
  2691.     // range-edit
  2692.     function rangeEditOnBlur(e) {
  2693.       if (e.relatedTarget !== this.elRange) {
  2694.         this.remove();
  2695.         this.elRange.elEdit = null;
  2696.       }
  2697.     }
  2698.     function rangeEditOnInput() {
  2699.       this.elRange.valueAsNumber = this.valueAsNumber;
  2700.       this.elRange.oninput();
  2701.     }
  2702.     // prevent the main page from interpreting key presses in inputs as hotkeys
  2703.     // which may happen since it sees only the outer <div> in the event |target|
  2704.     root.addEventListener('keydown', e => !e.altKey && !e.metaKey && e.stopPropagation(), true);
  2705.   }
  2706.  
  2707.   function initRules(config) {
  2708.     const rules = UI.rules;
  2709.     rules.addEventListener('input', checkRule);
  2710.     if (!isFF) rules.addEventListener('focusin', focusRule);
  2711.     if (!isFF) rules.addEventListener('paste', focusRule);
  2712.     blankRuleElement =
  2713.       setup.blankRuleElement =
  2714.         setup.blankRuleElement || rules.firstElementChild.cloneNode();
  2715.     for (const rule of config.hosts || []) {
  2716.       const el = blankRuleElement.cloneNode();
  2717.       el.value = typeof rule === 'string' ? rule : Ruler.format(rule);
  2718.       rules.appendChild(el);
  2719.       checkRule({target: el});
  2720.     }
  2721.     const search = UI.search;
  2722.     search.oninput = () => {
  2723.       setup.search = search.value;
  2724.       const s = search.value.toLowerCase();
  2725.       for (const el of rules.children)
  2726.         el.hidden = s && !el.value.toLowerCase().includes(s);
  2727.     };
  2728.     search.value = setup.search || '';
  2729.     if (search.value)
  2730.       search.oninput();
  2731.   }
  2732.  
  2733.   function renderCustomScales(config) {
  2734.     UI.scales.value = config.scales.join(' ').trim() || Config.DEFAULTS.scales.join(' ');
  2735.   }
  2736.  
  2737.   function renderValues(config) {
  2738.     for (const el of $$('input[id], select[id], textarea[id]', root))
  2739.       if (el.id in config)
  2740.         el[el.type === 'checkbox' ? 'checked' : 'value'] = config[el.id];
  2741.     for (const el of $$('input[type="range"]', root))
  2742.       el.oninput();
  2743.     for (const el of $$('a[href^="http"]', root))
  2744.       Object.assign(el, {target: '_blank', rel: 'noreferrer noopener external'});
  2745.     UI.delay.valueAsNumber = config.delay / 1000;
  2746.     UI.scale.valueAsNumber = Math.round(clamp(config.scale - 1, 0, 1) * 100);
  2747.   }
  2748. }
  2749.  
  2750. async function setupRuleInstaller(e) {
  2751.   dropEvent(e);
  2752.   const parent = this.parentElement;
  2753.   parent.children.installLoading.hidden = false;
  2754.   this.remove();
  2755.   let rules;
  2756.  
  2757.   try {
  2758.     rules = extractRules(await Remoting.getDoc(this.href));
  2759.     const selector = $create('select', {
  2760.       size: 8,
  2761.       style: 'width: 100%',
  2762.       ondblclick: e => e.target !== selector && maybeSetup(e),
  2763.       onkeyup: e => e.key === 'Enter' && maybeSetup(e),
  2764.     });
  2765.     selector.append(...rules.map(renderRule));
  2766.     selector.selectedIndex = findMatchingRuleIndex();
  2767.     // remove "name" since the installed rules don't need it
  2768.     for (const r of rules)
  2769.       delete r.name;
  2770.     parent.children.installLoading.remove();
  2771.     parent.children.installHint.hidden = false;
  2772.     parent.appendChild(selector);
  2773.     requestAnimationFrame(() => {
  2774.       const optY = selector.selectedOptions[0].offsetTop - selector.offsetTop;
  2775.       selector.scrollTo(0, optY - selector.offsetHeight / 2);
  2776.     });
  2777.   } catch (e) {
  2778.     parent.textContent = 'Error loading rules: ' + (e.message || e);
  2779.   }
  2780.  
  2781.   function extractRules({doc}) {
  2782.     const code = $('script', doc).textContent;
  2783.     // sort by name
  2784.     return JSON.parse(code.match(/var\s+rules\s*=\s*(\[.+]);?[\r\n]/)[1])
  2785.       .filter(r => !r.d || hostname.includes(r.d))
  2786.       .sort((a, b) =>
  2787.         (a = a.name.toLowerCase()) < (b = b.name.toLowerCase()) ? -1 :
  2788.           a > b ? 1 :
  2789.             0);
  2790.   }
  2791.  
  2792.   function findMatchingRuleIndex() {
  2793.     const dottedHost = `.${hostname}.`;
  2794.     const weighParts = (n, part) => n + (dottedHost.includes(`.${part}.`) && part.length);
  2795.     const weighName = name => name.toLowerCase().split(/[^a-z\d.-]+/i).reduce(weighParts, 0);
  2796.     return rules.reduce((max, {d, name}, index) => {
  2797.       const count = !!(d && hostname.includes(d)) * 10 + weighName(name);
  2798.       return count > max.count ? {count, index} : max;
  2799.     }, {count: 0, index: 0}).index;
  2800.   }
  2801.  
  2802.   function renderRule(r) {
  2803.     const {name, ...copy} = r;
  2804.     return $create('option', {
  2805.       textContent: name,
  2806.       title: Ruler.format(copy, {expand: true})
  2807.         .replace(/^{|\s*}$/g, '')
  2808.         .split('\n')
  2809.         .slice(0, 12)
  2810.         .map(renderTitleLine)
  2811.         .filter(Boolean)
  2812.         .join('\n'),
  2813.     });
  2814.   }
  2815.  
  2816.   function renderTitleLine(line, i, arr) {
  2817.     return (
  2818.       // show ... on 10th line if there are more lines
  2819.       i === 9 && arr.length > 10 ? '...' :
  2820.         i > 10 ? '' :
  2821.           // truncate to 100 chars
  2822.           (line.length > 100 ? line.slice(0, 100) + '...' : line)
  2823.             // strip the leading space
  2824.             .replace(/^\s/, ''));
  2825.   }
  2826.  
  2827.   function maybeSetup(e) {
  2828.     if (!modKeyPressed(e))
  2829.       setup({rule: rules[e.currentTarget.selectedIndex]});
  2830.   }
  2831. }
  2832.  
  2833. function createConfigHtml() {
  2834.   const MPIV_BASE_URL = 'https://w9p.co/userscripts/mpiv/';
  2835.   const scalesHint = 'Leave it empty and click Apply or Save to restore the default values.';
  2836.   const trimLeft = s => s.trim().replace(/\n\s+/g, '\r');
  2837.   return flattenHtml(`
  2838. <style>
  2839.   :host {
  2840.     all: initial !important;
  2841.     position: fixed !important;
  2842.     z-index: 2147483647 !important;
  2843.     top: 20px !important;
  2844.     right: 20px !important;
  2845.     padding: 1.5em !important;
  2846.     color: #000 !important;
  2847.     background: #eee !important;
  2848.     box-shadow: 5px 5px 25px 2px #000 !important;
  2849.     width: 32em !important;
  2850.     border: 1px solid black !important;
  2851.     display: flex !important;
  2852.     flex-direction: column !important;
  2853.   }
  2854.   main {
  2855.     font: 12px/15px sans-serif;
  2856.   }
  2857.   ul {
  2858.     max-height: calc(100vh - 200px);
  2859.     margin: 10px 0 15px 0;
  2860.     padding: 0;
  2861.     list-style: none;
  2862.   }
  2863.   li {
  2864.     margin: 0;
  2865.     padding: .25em 0;
  2866.   }
  2867.   li.options {
  2868.     display: flex;
  2869.     align-items: center;
  2870.     justify-content: space-between;
  2871.   }
  2872.   li.row {
  2873.     flex-wrap: wrap;
  2874.     justify-content: flex-start;
  2875.   }
  2876.   li.row label {
  2877.     flex-direction: row;
  2878.     align-items: center;
  2879.   }
  2880.   li.row input {
  2881.     margin-right: .25em;
  2882.   }
  2883.   li.stretch label {
  2884.     flex: 1;
  2885.     white-space: nowrap;
  2886.   }
  2887.   li.stretch label > span {
  2888.     display: flex;
  2889.     flex-direction: row;
  2890.     flex: 1;
  2891.   }
  2892.   label {
  2893.     display: inline-flex;
  2894.     flex-direction: column;
  2895.   }
  2896.   label:not(:last-child) {
  2897.     margin-right: 1em;
  2898.   }
  2899.   input, select {
  2900.     min-height: 1.6em;
  2901.     box-sizing: border-box;
  2902.   }
  2903.   input[type=checkbox] {
  2904.     margin-left: 0;
  2905.   }
  2906.   input[type=number] {
  2907.     width: 4em;
  2908.   }
  2909.   input:not([type=checkbox])  {
  2910.     padding: 0 .25em;
  2911.   }
  2912.   input[type=range] {
  2913.     flex: 1;
  2914.     width: 100%;
  2915.     margin: 0 .25em;
  2916.     padding: 0;
  2917.     filter: saturate(0);
  2918.     opacity: .5;
  2919.   }
  2920.   u + input[type=range] {
  2921.     max-width: 3em;
  2922.   }
  2923.   input[type=range]:hover {
  2924.     filter: none;
  2925.     opacity: 1;
  2926.   }
  2927.   input[type=color] {
  2928.     position: absolute;
  2929.     width: calc(1.5em + 2px);
  2930.     opacity: 0;
  2931.     cursor: pointer;
  2932.   }
  2933.   u {
  2934.     display: inline-block;
  2935.     position: relative;
  2936.     width: 1.5em;
  2937.     height: 1.5em;
  2938.     border: 1px solid #888;
  2939.     pointer-events: none;
  2940.     color: #888;
  2941.     background-image:
  2942.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%),
  2943.       linear-gradient(45deg, currentColor 25%, transparent 25%, transparent 75%, currentColor 75%);
  2944.     background-size: .5em .5em;
  2945.     background-position: 0 0, .25em .25em;
  2946.   }
  2947.   u::after {
  2948.     position: absolute;
  2949.     top: 0;
  2950.     left: 0;
  2951.     right: 0;
  2952.     bottom: 0;
  2953.     content: "";
  2954.     background-color: var(--color);
  2955.   }
  2956.   .range-edit {
  2957.     position: absolute;
  2958.     box-shadow: 0 0.25em 1em #000;
  2959.     z-index: 99;
  2960.   }
  2961.   #rules input,
  2962.   textarea {
  2963.     flex: 1;
  2964.     resize: vertical;
  2965.     margin: 1px 0;
  2966.     font: 11px/1.25 Consolas, monospace;
  2967.   }
  2968.   :invalid {
  2969.     background-color: #f002;
  2970.     border-color: #800;
  2971.   }
  2972.   code {
  2973.     font-weight: bold;
  2974.   }
  2975.   a {
  2976.     text-decoration: none;
  2977.   }
  2978.   a:hover {
  2979.     text-decoration: underline;
  2980.   }
  2981.   button {
  2982.     padding: .2em 1em;
  2983.     margin: 0 1em;
  2984.   }
  2985.   .column {
  2986.     display: flex;
  2987.     flex-direction: column;
  2988.   }
  2989.   .highlight {
  2990.     animation: 2s fade-in cubic-bezier(0, .75, .25, 1);
  2991.     animation-fill-mode: both;
  2992.   }
  2993.   #rules > * {
  2994.     word-break: break-all;
  2995.   }
  2996.   .invalid-domain {
  2997.     opacity: .5;
  2998.   }
  2999.   #x {
  3000.     position: absolute;
  3001.     top: 0;
  3002.     right: 0;
  3003.     padding: 4px 8px;
  3004.     cursor: pointer;
  3005.     user-select: none;
  3006.   }
  3007.   #x:hover {
  3008.     background-color: #8884;
  3009.   }
  3010.   #cssApp {
  3011.     color: seagreen;
  3012.   }
  3013.   #exportNotification {
  3014.     color: green;
  3015.     font-weight: bold;
  3016.     position: absolute;
  3017.     left: 0;
  3018.     right: 0;
  3019.     bottom: 2px;
  3020.   }
  3021.   #installHint {
  3022.     color: green;
  3023.   }
  3024.   @keyframes fade-in {
  3025.     from { background-color: deepskyblue }
  3026.     to {}
  3027.   }
  3028.   @media (prefers-color-scheme: dark) {
  3029.     :host {
  3030.       color: #aaa !important;
  3031.       background: #333 !important;
  3032.     }
  3033.     a {
  3034.       color: deepskyblue;
  3035.     }
  3036.     button {
  3037.       background: linear-gradient(-5deg, #333, #555);
  3038.       border: 1px solid #000;
  3039.       box-shadow: 0 2px 6px #181818;
  3040.       border-radius: 3px;
  3041.       cursor: pointer;
  3042.     }
  3043.     button:hover {
  3044.       background: linear-gradient(-5deg, #333, #666);
  3045.     }
  3046.     textarea, input, select {
  3047.       background: #111;
  3048.       color: #BBB;
  3049.       border: 1px solid #555;
  3050.     }
  3051.     input[type=checkbox] {
  3052.       filter: invert(1);
  3053.     }
  3054.     input[type=range] {
  3055.       filter: invert(1) saturate(0);
  3056.     }
  3057.     input[type=range]:hover {
  3058.       filter: invert(1);
  3059.     }
  3060.     @supports (-moz-appearance: none) {
  3061.       input[type=checkbox],
  3062.       input[type=range],
  3063.       input[type=range]:hover {
  3064.         filter: none;
  3065.       }
  3066.     }
  3067.     .range-edit {
  3068.       box-shadow: 0 .5em 1em .5em #000;
  3069.     }
  3070.     #cssApp {
  3071.       color: darkseagreen;
  3072.     }
  3073.     #installHint {
  3074.       color: greenyellow;
  3075.     }
  3076.   }
  3077. </style>
  3078. <main>
  3079.   <a href="${MPIV_BASE_URL}">${GM_info.script.name}</a>
  3080.   <div id=x>x</div>
  3081.   <ul class=column>
  3082.     <li class=options>
  3083.       <label>Popup shows on
  3084.         <select id=start>
  3085.           <option value=auto>automatically
  3086.           <option value=context>Right click / Ctrl
  3087.           <option value=ctrl>Ctrl
  3088.         </select>
  3089.       </label>
  3090.       <label>after, sec<input id=delay type=number min=0.05 max=10 step=0.05 title=seconds></label>
  3091.       <label title="(if the full version of the hovered image is ...% larger)">
  3092.         if larger, %<input id=scale type=number min=0 max=100 step=1>
  3093.       </label>
  3094.       <label>Zoom activates on
  3095.         <select id=zoom>
  3096.           <option value=context>Right click / Shift
  3097.           <option value=wheel>Wheel up / Shift
  3098.           <option value=shift>Shift
  3099.           <option value=auto>automatically
  3100.         </select>
  3101.       </label>
  3102.       <label>...and zooms to
  3103.         <select id=fit>
  3104.           <option value=all>fit to window
  3105.           <option value=large>fit if larger
  3106.           <option value=no>100%
  3107.           <option value="" title="Use custom scale factors">custom
  3108.         </select>
  3109.       </label>
  3110.     </li>
  3111.     <li class=options>
  3112.       <label>Zoom step, %<input id=zoomStep type=number min=100 max=400 step=1>
  3113.       </label>
  3114.       <label>When fully zoomed out:
  3115.         <select id=zoomOut>
  3116.           <option value=stay>stay in zoom mode
  3117.           <option value=auto>stay if still hovered
  3118.           <option value=unzoom>undo zoom mode
  3119.           <option value=close>close popup
  3120.         </select>
  3121.       </label>
  3122.       <label style="flex: 1" title="${trimLeft(`
  3123.         Scale factors to use when “zooms to” selector is set to “custom”.
  3124.         0 = fit to window,
  3125.         0! = same as 0 but also removes smaller values,
  3126.         * after a value marks the default zoom factor, for example: 1*
  3127.         The popup won't shrink below the image's natural size or window size for bigger mages.
  3128.         ${scalesHint}
  3129.       `)}">Custom scale factors:
  3130.         <input id=scales placeholder="${scalesHint}">
  3131.       </label>
  3132.     </li>
  3133.     <li class="options row">
  3134.       <label><input type=checkbox id=center>Always centered</label>
  3135.       <label title="Disable only if you spoof the HTTP headers yourself">
  3136.         <input type=checkbox id=xhr>Anti-hotlinking workaround
  3137.       </label>
  3138.       <label><input type=checkbox id=preload>Start preloading immediately</label>
  3139.       <label><input type=checkbox id=imgtab>Run in image tabs</label>
  3140.       <label title="Don't enable unless you explicitly use it in your custom CSS">
  3141.         <input type=checkbox id=globalStatus>Expose status on &lt;html&gt; node (may cause slowdowns)
  3142.       </label>
  3143.     </li>
  3144.     <li class="options stretch">
  3145.       <label>Background
  3146.         <span>
  3147.           <input id=uiBackgroundColor type=color><u></u>
  3148.           <input id=uiBackgroundOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3149.         </span>
  3150.       </label>
  3151.       <label>Border color, opacity, size
  3152.         <span>
  3153.           <input id=uiBorderColor type=color><u></u>
  3154.           <input id=uiBorderOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3155.           <input id=uiBorder type=range min=0 max=20 step=1 data-title="Border size: $px">
  3156.         </span>
  3157.       </label>
  3158.       <label>Shadow color, opacity, size
  3159.         <span>
  3160.           <input id=uiShadowColor type=color><u></u>
  3161.           <input id=uiShadowOpacity type=range min=0 max=100 step=1 data-title="Opacity: $%">
  3162.           <input id=uiShadow type=range min=0 max=100 step=1 data-title="
  3163.             ${'Shadow blur radius: $px\n"0" disables the shadow.'}">
  3164.         </span>
  3165.       </label>
  3166.       <label>Padding
  3167.         <span><input id=uiPadding type=range min=0 max=100 step=1 data-title="Padding: $px"></span>
  3168.       </label>
  3169.       <label>Margin
  3170.         <span><input id=uiMargin type=range min=0 max=100 step=1 data-title="Margin: $px"></span>
  3171.       </label>
  3172.     </li>
  3173.     <li>
  3174.       <a href="${MPIV_BASE_URL}css.html">Custom CSS:</a>&nbsp;
  3175.       e.g. <b>#mpiv-popup { animation: none !important }</b>
  3176.       <a href="#" id=reveal style="float: right"
  3177.          title="You can copy parts of it to override them in your custom CSS">
  3178.          View the built-in CSS</a>
  3179.       <div class=column>
  3180.         <textarea id=css spellcheck=false></textarea>
  3181.         <textarea id=cssApp spellcheck=false hidden readonly rows=30></textarea>
  3182.       </div>
  3183.     </li>
  3184.     <li style="display: flex; justify-content: space-between;">
  3185.       <div><a href="${MPIV_BASE_URL}host_rules.html">Custom host rules:</a></div>
  3186.       <div style="white-space: nowrap">
  3187.         To disable, put any symbol except <code>a..z 0..9 - .</code><br>
  3188.         in "d" value, for example <code>"d": "!foo.com"</code>
  3189.       </div>
  3190.       <div>
  3191.         <input id=search type=search placeholder=Search style="width: 10em; margin-left: 1em">
  3192.       </div>
  3193.     </li>
  3194.     <li style="margin-left: -3px; margin-right: -3px; overflow-y: auto; padding-left: 3px; padding-right: 3px;">
  3195.       <div id=rules class=column>${
  3196.   isFF && /win/i.test(navigator.platform)
  3197.     ? '<input spellcheck=false>' // textareas in FF+Windows are like 100x slower than inputs
  3198.     : '<textarea rows=1 spellcheck=false></textarea>'}
  3199.       </div>
  3200.     </li>
  3201.     <li>
  3202.       <div hidden id=installLoading>Loading...</div>
  3203.       <div hidden id=installHint>Double-click the rule (or select and press Enter) to add it.
  3204.         Click <code>Apply</code> or <code>Save</code> to confirm.</div>
  3205.       <a href="${MPIV_BASE_URL}more_host_rules.html" id=install>Install rule from repository...</a>
  3206.     </li>
  3207.   </ul>
  3208.   <div style="text-align:center">
  3209.     <button id=ok accesskey=s>Save</button>
  3210.     <button id=apply accesskey=a>Apply</button>
  3211.     <button id=import style="margin-right: 0">Import</button>
  3212.     <button id=export style="margin-left: 0">Export</button>
  3213.     <button id=cancel>Cancel</button>
  3214.     <div id=exportNotification hidden>Copied to clipboard.</div>
  3215.   </div>
  3216. </main>`);
  3217. }
  3218.  
  3219. function createGlobalStyle() {
  3220.   App.globalStyle = /*language=CSS*/ (String.raw`
  3221. #\mpiv-bar {
  3222.   position: fixed;
  3223.   z-index: 2147483647;
  3224.   top: 0;
  3225.   left: 0;
  3226.   right: 0;
  3227.   opacity: 0;
  3228.   transition: opacity 1s ease .25s;
  3229.   text-align: center;
  3230.   font-family: sans-serif;
  3231.   font-size: 15px;
  3232.   font-weight: bold;
  3233.   background: #0005;
  3234.   color: white;
  3235.   padding: 4px 10px;
  3236.   text-shadow: .5px .5px 2px #000;
  3237. }
  3238. #\mpiv-bar.\mpiv-show {
  3239.   opacity: 1;
  3240. }
  3241. #\mpiv-bar[data-zoom]::after {
  3242.   content: " (" attr(data-zoom) ")";
  3243.   opacity: .8;
  3244. }
  3245. #\mpiv-popup.\mpiv-show {
  3246.   display: inline;
  3247. }
  3248. #\mpiv-popup {
  3249.   display: none;
  3250.   cursor: none;
  3251.   animation: .2s \mpiv-fadein both;
  3252.   transition: box-shadow .25s, background-color .25s;
  3253. ${App.popupStyleBase = `
  3254.   border: none;
  3255.   box-sizing: border-box;
  3256.   position: fixed;
  3257.   z-index: 2147483647;
  3258.   padding: 0;
  3259.   margin: 0;
  3260.   top: 0;
  3261.   left: 0;
  3262.   width: auto;
  3263.   height: auto;
  3264.   transform-origin: top left;
  3265.   max-width: none;
  3266.   max-height: none;
  3267. `}
  3268. }
  3269. #\mpiv-popup.\mpiv-show {
  3270.   ${cfg.uiBorder ? `border: ${cfg.uiBorder}px solid ${Util.color('Border')};` : ''}
  3271.   ${cfg.uiPadding ? `padding: ${cfg.uiPadding}px;` : ''}
  3272.   ${cfg.uiMargin ? `margin: ${cfg.uiMargin}px;` : ''}
  3273.   box-shadow: ${cfg.uiShadow ? `2px 4px ${cfg.uiShadow}px 4px transparent` : 'none'};
  3274. }
  3275. #\mpiv-popup.\mpiv-show[loaded] {
  3276.   background-color: ${Util.color('Background')};
  3277.   ${cfg.uiShadow ? `box-shadow: 2px 4px ${cfg.uiShadow}px 4px ${Util.color('Shadow')};` : ''}
  3278. }
  3279. #\mpiv-popup.\mpiv-zoom-max {
  3280.   image-rendering: pixelated;
  3281. }
  3282. @keyframes \mpiv-fadein {
  3283.   from {
  3284.     opacity: 0;
  3285.     border-color: transparent;
  3286.   }
  3287.   to {
  3288.     opacity: 1;
  3289.   }
  3290. }
  3291. ` + (cfg.globalStatus ? String.raw`
  3292. .\mpiv-loading:not(.\mpiv-preloading) * {
  3293.   cursor: progress !important;
  3294. }
  3295. .\mpiv-edge #\mpiv-popup {
  3296.   cursor: default;
  3297. }
  3298. .\mpiv-error * {
  3299.   cursor: not-allowed !important;
  3300. }
  3301. .\mpiv-ready *, .\mpiv-large * {
  3302.   cursor: zoom-in !important;
  3303. }
  3304. .\mpiv-shift * {
  3305.   cursor: default !important;
  3306. }
  3307. ` : String.raw`
  3308. #\mpiv-popup[\mpiv-status~="loading"]:not([\mpiv-status~="preloading"]) {
  3309.   cursor: progress;
  3310. }
  3311. #\mpiv-popup[\mpiv-status~="edge"] {
  3312.   cursor: default;
  3313. }
  3314. #\mpiv-popup[\mpiv-status~="error"] {
  3315.   cursor: not-allowed;
  3316. }
  3317. #\mpiv-popup[\mpiv-status~="ready"],
  3318. #\mpiv-popup[\mpiv-status~="large"] {
  3319.   cursor: zoom-in;
  3320. }
  3321. #\mpiv-popup[\mpiv-status~="shift"] {
  3322.   cursor: default;
  3323. }
  3324. `)).replace(/\\mpiv-status/g, STATUS_ATTR).replace(/\\mpiv-/g, PREFIX);
  3325.   App.popupStyleBase = App.popupStyleBase.replace(/;/g, '!important;');
  3326.   return App.globalStyle;
  3327. }
  3328.  
  3329. //#region Global utilities
  3330. const clamp = (v, min, max) =>
  3331.   v < min ? min : v > max ? max : v;
  3332.  
  3333. const compareNumbers = (a, b) =>
  3334.   a - b;
  3335.  
  3336. const flattenHtml = str =>
  3337.   str.trim()
  3338.     .replace(/\n\s*/g, '')
  3339.     .replace(/\x20?([:>])\x20/g, '$1');
  3340.  
  3341. const dropEvent = e =>
  3342.   (e.preventDefault(), e.stopPropagation());
  3343.  
  3344. const ensureArray = v =>
  3345.   Array.isArray(v) ? v : [v];
  3346.  
  3347. const modKeyPressed = e =>
  3348.   e.altKey || e.shiftKey || e.ctrlKey || e.metaKey;
  3349.  
  3350. const now = performance.now.bind(performance);
  3351.  
  3352. const sumProps = (...props) =>
  3353.   props.reduce((sum, v) => sum + (parseFloat(v) || 0), 0);
  3354.  
  3355. const tryCatch = function (fn, ...args) {
  3356.   try {
  3357.     return fn.apply(this, args);
  3358.   } catch (e) {}
  3359. };
  3360.  
  3361. const $ = (sel, node = doc) =>
  3362.   node.querySelector(sel) || false;
  3363.  
  3364. const $$ = (sel, node = doc) =>
  3365.   node.querySelectorAll(sel);
  3366.  
  3367. const $create = (tag, props) =>
  3368.   Object.assign(doc.createElement(tag), props);
  3369.  
  3370. const $css = (el, props) =>
  3371.   Object.entries(props).forEach(([k, v]) =>
  3372.     el.style.setProperty(k, v, 'important'));
  3373.  
  3374. const $many = (q, doc) =>
  3375.   q && ensureArray(q).reduce((el, sel) => el || $(sel, doc), null);
  3376.  
  3377. const $prop = (sel, prop, node = doc) =>
  3378.   (node = $(sel, node)) && node[prop] || '';
  3379.  
  3380. const $propUp = (node, prop) =>
  3381.   (node = node.closest(`[${prop}]`)) &&
  3382.   (prop.startsWith('data-') ? node.getAttribute(prop) : node[prop]) ||
  3383.   '';
  3384.  
  3385. const $remove = node =>
  3386.   node && node.remove();
  3387. //#endregion
  3388.  
  3389. //#region Init
  3390. const isFF = CSS.supports('-moz-appearance', 'none');
  3391. const AudioContext = window.AudioContext || function () {};
  3392.  
  3393. cfg = new Config({save: true});
  3394.  
  3395. App.enabled = true;
  3396. (cb => doc.body ? cb() : document.addEventListener('DOMContentLoaded', cb, {once: true}))(() => {
  3397.   const el = doc.body.firstElementChild;
  3398.   App.isImageTab = el && el === doc.body.lastElementChild && el.matches('img, video');
  3399.   App.enabled = cfg.imgtab || !App.isImageTab;
  3400. });
  3401.  
  3402. if (window === top)
  3403.   GM_registerMenuCommand('MPIV: configure', setup);
  3404. doc.addEventListener('mouseover', Events.onMouseOver, {passive: true});
  3405.  
  3406. if (['greasyfork.org', 'w9p.co', 'github.com'].includes(hostname)) {
  3407.   doc.addEventListener('click', e => {
  3408.     const el = e.target.closest('blockquote, code, pre');
  3409.     const text = el && el.textContent.trim() || '';
  3410.     let rule;
  3411.     if (!e.button && !modKeyPressed(e) &&
  3412.         text.startsWith('{') && text.endsWith('}') &&
  3413.         /[{,]\s*"[degqrsu]"\s*:\s*"/.test(text) &&
  3414.         (rule = tryCatch(JSON.parse, text)) &&
  3415.         Object.keys(rule).some(k => /^[degqrsu]$/.test(k))) {
  3416.       setup({rule});
  3417.       dropEvent(e);
  3418.     }
  3419.   });
  3420. }
  3421.  
  3422. window.addEventListener('message', App.onMessage);
  3423. //#endregion