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script.user.js
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script.user.js
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// ==UserScript==
// @name Mouseover Popup Image Viewer
// @namespace https://github.com/tophf
// @description Shows images and videos behind links and thumbnails.
//
// @include *
// @run-at document-start
//
// @grant GM_addElement
// @grant GM_download
// @grant GM_getValue
// @grant GM_getValues
// @grant GM_openInTab
// @grant GM_registerMenuCommand
// @grant GM_unregisterMenuCommand
// @grant GM_setClipboard
// @grant GM_setValue
// @grant GM_xmlhttpRequest
//
// @grant GM.getValue
// @grant GM.openInTab
// @grant GM.registerMenuCommand
// @grant GM.unregisterMenuCommand
// @grant GM.setClipboard
// @grant GM.setValue
// @grant GM.xmlHttpRequest
//
// @version 1.4.6
// @author tophf
//
// @original-version 2017.9.29
// @original-author kuehlschrank
//
// @connect *
// CSP check:
// @connect self
// rule installer in config dialog:
// @connect github.com
// big/trusted hostings for the built-in rules with "q":
// @connect deviantart.com
// @connect facebook.com
// @connect fbcdn.com
// @connect flickr.com
// @connect gfycat.com
// @connect googleusercontent.com
// @connect gyazo.com
// @connect imgur.com
// @connect instagr.am
// @connect instagram.com
// @connect prnt.sc
// @connect prntscr.com
// @connect user-images.githubusercontent.com
//
// @supportURL https://github.com/tophf/mpiv/issues
// @icon https://raw.githubusercontent.com/tophf/mpiv/master/icon.png
// ==/UserScript==
'use strict';
//#region Globals
/** @type mpiv.Config */
let cfg;
/** @type mpiv.AppInfo */
let ai = {rule: {}};
/** @type Element */
let elSetup;
let nonce;
const doc = document;
const hostname = location.hostname;
const dotDomain = '.' + hostname;
const isFF = CSS.supports('-moz-appearance', 'none');
const AudioContext = window.AudioContext || function () {};
const {from: arrayFrom, isArray} = Array;
const PREFIX = 'mpiv-';
const NOAA_ATTR = 'data-no-aa';
const STATUS_ATTR = `${PREFIX}status`;
const MSG = Object.assign({}, ...[
'getViewSize',
'viewSize',
].map(k => ({[k]: `${PREFIX}${k}`})));
const WHEEL_EVENT = 'onwheel' in doc ? 'wheel' : 'mousewheel';
// time for volatile things to settle down meanwhile we postpone action
// examples: loading image from cache, quickly moving mouse over one element to another
const SETTLE_TIME = 50;
// used to detect JS code in host rules
const RX_HAS_CODE = /(^|[^-\w])return[\W\s]/;
const RX_EVAL_BLOCKED = /'Trusted(Script| Type)'|unsafe-eval/;
const RX_MEDIA_URL = /^(?!data:)[^?#]+?\.(avif|bmp|jpe?g?|gif|mp4|png|svgz?|web[mp])($|[?#])/i;
const BLANK_PIXEL = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
const ZOOM_MAX = 16;
const SYM_U = Symbol('u');
const FN_ARGS = {
s: ['m', 'node', 'rule'],
c: ['text', 'doc', 'node', 'rule'],
q: ['text', 'doc', 'node', 'rule'],
g: ['text', 'doc', 'url', 'm', 'rule', 'node', 'cb'],
};
let trustedHTML, trustedScript;
//#endregion
//#region GM4 polyfill
if (typeof GM === 'undefined' || !GM.xmlHttpRequest)
this.GM = {__proto__: null, info: GM_info};
if (!GM.getValue)
GM.getValue = GM_getValue; // we use it only with `await` so no need to return a Promise
if (!GM.setValue)
GM.setValue = GM_setValue; // we use it only with `await` so no need to return a Promise
if (!GM.openInTab)
GM.openInTab = GM_openInTab;
if (!GM.registerMenuCommand && typeof GM_registerMenuCommand === 'function')
GM.registerMenuCommand = GM_registerMenuCommand;
if (!GM.unregisterMenuCommand && typeof GM_unregisterMenuCommand === 'function')
GM.unregisterMenuCommand = GM_unregisterMenuCommand;
if (!GM.setClipboard)
GM.setClipboard = GM_setClipboard;
if (!GM.xmlHttpRequest)
GM.xmlHttpRequest = GM_xmlhttpRequest;
//#endregion
const App = {
isEnabled: true,
isImageTab: false,
globalStyle: '',
popupStyleBase: '',
tabfix: /\.(dumpoir|greatfon|picuki)\.com$/.test(dotDomain),
NOP: /\.(facebook|instagram|chrome|google)\.com$/.test(dotDomain) &&
(() => {}),
activate(info, event) {
const {match, node, rule, url} = info;
const auto = cfg.start === 'auto';
const vidCtrl = cfg.videoCtrl && isVideo(node);
if (elSetup) console.info({node, rule, url, match});
if (auto && vidCtrl && !Events.ctrl)
return;
if (ai.node) App.deactivate();
ai = info;
ai.force = Events.ctrl;
ai.gNum = 0;
ai.zooming = cfg.css.includes(`${PREFIX}zooming`);
Util.suppressTooltip();
Calc.updateViewSize();
Events.ctrl = false;
Events.toggle(true);
Events.trackMouse(event);
if (ai.force && (auto || cfg.start === 'ctrl' || cfg.start === 'context')) {
App.start();
} else if ((auto || cfg.preload) && !vidCtrl && !rule.manual) {
App.belate(auto);
} else {
Status.set('ready');
}
},
belate(auto) {
if (cfg.preload) {
ai.preloadStart = auto ? now() : -1;
App.start();
Status.set('+preloading');
} else {
ai.timer = setTimeout(App.start, cfg.delay);
}
},
checkProgress({start} = {}) {
const p = ai.popup;
if (!p)
return;
const w = ai.nwidth = p.naturalWidth || p.videoWidth || ai.popupLoaded && innerWidth / 2;
const h = ai.nheight = p.naturalHeight || p.videoHeight || ai.popupLoaded && innerHeight / 2;
if (h)
return App.canCommit(w, h);
if (start) {
clearInterval(ai.timerProgress);
ai.timerProgress = setInterval(App.checkProgress, 150);
}
},
canClose: (p = ai.popup) => !p || (
isVideo(p)
? !cfg.keepVids
: document.fullscreenElement !== p
),
canCommit(w, h) {
if (!ai.force && ai.rect && !ai.gItems &&
Math.max(w / (ai.rect.width || 1), h / (ai.rect.height || 1)) < cfg.scale) {
App.deactivate();
return false;
}
App.stopTimers();
let wait = ai.preloadStart;
if (wait < 0 && !ai.force || !ai.popup)
return;
if (wait > 0 && (wait += cfg.delay - now()) > 0) {
ai.timer = setTimeout(App.checkProgress, wait);
} else if ((!w || !h) && (ai.urls || []).length) {
App.handleError({type: 'error'});
} else {
App.commit();
}
return true;
},
async commit() {
const p = ai.popupShown = ai.popup;
const isDecoded = cfg.waitLoad && isFunction(p.decode);
if (isDecoded) {
await p.decode();
if (p !== ai.popup)
return;
}
Status.set('-preloading');
App.updateStyles();
Calc.measurePopup();
const willZoom = cfg.zoom === 'auto' || App.isImageTab && cfg.imgtab;
const willMove = !willZoom || App.toggleZoom({keepScale: true}) === undefined;
if (willMove)
Popup.move();
Bar.updateName();
Bar.updateDetails();
Status.set(!ai.popupLoaded && 'loading');
ai.large = ai.nwidth > p.clientWidth + ai.extras.w ||
ai.nheight > p.clientHeight + ai.extras.h;
if (ai.large) {
Status.set('+large');
// prevent a blank bg+border in FF
if (isFF && p.complete && !isDecoded)
p.style.backgroundImage = `url('${p.src}')`;
}
if (ai.preloadStart < 0 && isFunction(p.play))
p.play().catch(now);
},
deactivate({wait} = {}) {
App.stopTimers(true);
if (ai.req)
tryCatch(ai.req.abort);
if (ai.tooltip)
ai.tooltip.node.title = ai.tooltip.text;
Status.set(false);
Bar.set(false);
Events.toggle(false);
Popup.destroy();
if (wait) {
App.isEnabled = false;
setTimeout(App.enable, 200);
}
ai = {rule: {}};
},
enable() {
App.isEnabled = true;
},
handleError(e, rule = ai.rule) {
if (rule && rule.onerror === 'skip')
return;
if (ai.imageUrl &&
!ai.xhr &&
!ai.imageUrl.startsWith(location.origin + '/') &&
location.protocol === 'https:' &&
CspSniffer.init) {
Popup.create(ai.imageUrl, ai.pageUrl, e);
return;
}
const fe = Util.formatError(e, rule);
if (!rule || !ai.urls || !ai.urls.length)
console.warn(...fe);
if (ai.urls && ai.urls.length) {
ai.url = ai.urls.shift();
if (ai.url) {
App.stopTimers();
App.startSingle();
} else {
App.deactivate();
}
} else if (ai.node) {
Status.set('error');
Bar.set(fe.message, 'error');
}
},
/** @param {MessageEvent} e */
onMessage(e) {
if (typeof e.data === 'string' && e.data === MSG.getViewSize) {
e.stopImmediatePropagation();
for (const el of doc.getElementsByTagName('iframe')) {
if (el.contentWindow === e.source) {
const s = Calc.frameSize(el, window).join(':');
e.source.postMessage(`${MSG.viewSize}:${s}`, '*');
return;
}
}
}
},
/** @param {MessageEvent} e */
onMessageChild(e) {
if (e.source === parent && typeof e.data === 'string' && e.data.startsWith(MSG.viewSize)) {
e.stopImmediatePropagation();
removeEventListener('message', App.onMessageChild, true);
const [w, h, x, y] = e.data.split(':').slice(1).map(parseFloat);
if (w && h) ai.view = {w, h, x, y};
}
},
start() {
App.updateStyles();
if (ai.gallery)
App.startGallery();
else
App.startSingle();
},
startSingle() {
Status.loading();
if (ai.force && ai.preloadStart < 0) {
App.commit();
return;
}
ai.imageUrl = null;
if (ai.rule.follow && !ai.rule.q && !ai.rule.s) {
Req.findRedirect();
} else if (ai.rule.q && !isArray(ai.urls)) {
App.startFromQ();
} else {
Popup.create(ai.url);
Ruler.runC();
}
},
async startFromQ() {
try {
const {responseText, doc, finalUrl} = await Req.getDoc(ai.url);
const url = Ruler.runQ(responseText, doc, finalUrl);
if (!url) {
App.handleError(['The "q" rule did not produce any URL.', '\nRemote doc: %o', doc]);
return;
}
if (RuleMatcher.isFollowableUrl(url, ai.rule)) {
const info = RuleMatcher.find(url, ai.node, {noHtml: true});
if (!info || !info.url)
throw `Couldn't follow URL: ${url}`;
Object.assign(ai, info);
App.startSingle();
} else {
Popup.create(url, finalUrl);
Ruler.runC(responseText, doc);
}
} catch (e) {
App.handleError(e);
}
},
async startGallery() {
Status.loading();
try {
const startUrl = ai.url;
const p = await Req.getDoc(ai.rule.s !== 'gallery' && startUrl);
const items = await new Promise(cb => {
const res = ai.gallery(p.responseText, p.doc, p.finalUrl, ai.match, ai.rule, ai.node, cb);
if (res !== undefined) cb(res);
});
// bail out if the gallery's async callback took too long
if (ai.url !== startUrl) return;
ai.gNum = items.length;
ai.gItems = items.length && items;
if (ai.gItems) {
const i = items.index;
ai.gIndex = i >= 0 && items[i] ? +i :
Gallery.findIndex(typeof i === 'string' ? i : ai.url);
setTimeout(Gallery.next);
} else {
throw 'Empty gallery';
}
} catch (e) {
App.handleError(e);
}
},
stopTimers(bar) {
for (const timer of ['timer', 'timerStatus', bar && 'timerBar'])
clearTimeout(ai[timer]);
clearInterval(ai.timerProgress);
},
toggleZoom({keepScale} = {}) {
const p = ai.popup;
if (!p || !ai.scales || ai.scales.length < 2)
return;
ai.zoomed = !ai.zoomed;
ai.scale = ai.zoomed && Calc.scaleForFirstZoom(keepScale) || ai.scales[0];
if (ai.zooming)
p.classList.add(`${PREFIX}zooming`);
Popup.move();
Bar.updateDetails();
Status.set(ai.zoomed ? 'zoom' : false);
return ai.zoomed;
},
updateStyles() {
Util.addStyle('global', (App.globalStyle || createGlobalStyle()) + cfg._getCss());
Util.addStyle('rule', ai.rule.css || '');
},
};
const Bar = {
set(label, cls, prefix) {
let b = ai.bar;
if (typeof label !== 'string') {
$remove(b);
ai.bar = null;
return;
}
const force = !b && 0;
if (!b) b = ai.bar = $new('div', {id: `${PREFIX}bar`, className: `${PREFIX}${cls}`});
ai.barText = label;
App.updateStyles();
Bar.updateDetails();
Bar.setText(cfg.uiInfoCaption || cls === 'error' || cls === 'xhr' ? label : '');
$dataset(b, 'prefix', prefix);
setTimeout(Bar.show, 0, force);
if (!b.parentNode) {
doc.body.appendChild(b);
Util.forceLayout(b);
}
},
setText(text) {
if (/<([a-z][-a-z]*)[^<>]*>[^<>]*<\/\1\s*>/i.test(text)) { // checking for <tag...>...</tag>
ai.bar.innerHTML = trustedHTML ? trustedHTML(text) : text;
} else {
ai.bar.textContent = text;
}
},
show(force) {
const b = ai.bar;
if (!force && (!cfg.uiInfo || force !== 0 && cfg.uiInfoOnce) || ai.barShown)
return;
clearTimeout(ai.timerBar);
b.classList.add(PREFIX + 'show');
$dataset(b, 'force', force === 2 ? '' : null);
ai.timerBar = !force && setTimeout(Bar.hide, cfg.uiInfoHide * 1000);
ai.barShown = true;
},
hide(force) {
const b = ai.bar;
if (!b || !force && (!cfg.uiInfo || b.dataset.force) || !ai.barShown)
return;
$dataset(b, 'force', force === 2 ? '' : null);
b.classList.remove(PREFIX + 'show');
ai.barShown = false;
},
updateName() {
const {gItems: gi, gIndex: i, gNum: n} = ai;
if (gi) {
const item = gi[i];
const noDesc = !gi.some(_ => _.desc);
const c = [
gi.title && (!i || noDesc) && !`${item.desc || ''}`.includes(gi.title) && gi.title || '',
item.desc,
].filter(Boolean).join(' - ');
Bar.set(c.trim() || ' ', 'gallery', n > 1 ? `${i + 1}/${n}` : null);
} else if ('caption' in ai) {
Bar.set(ai.caption, 'caption');
} else if (ai.tooltip) {
Bar.set(ai.tooltip.text, 'tooltip');
} else {
Bar.set(' ', 'info');
}
},
updateDetails() {
if (!ai.bar) return;
const r = ai.rotate;
const zoom = ai.nwidth && `${
Math.round(ai.scale * 100)
}%${
ai.flipX || ai.flipY ? `, ${ai.flipX ? '⇆' : ''}${ai.flipY ? '⇅' : ''}` : ''
}${
r ? ', ' + (r > 180 ? r - 360 : r) + '°' : ''
}, ${
ai.nwidth
} x ${
ai.nheight
} px, ${
Math.round(100 * (ai.nwidth * ai.nheight / 1e6)) / 100
} MP, ${
Calc.aspectRatio(ai.nwidth, ai.nheight)
}`.replace(/\x20/g, '\xA0');
if (ai.bar.dataset.zoom !== zoom || !ai.nwidth) {
$dataset(ai.bar, 'zoom', zoom || null);
Bar.show();
}
},
};
const Calc = {
aspectRatio(w, h) {
for (let rat = w / h, a, b = 0; ;) {
b++;
a = Math.round(w * b / h);
if (a > 10 && b > 10 || a > 100 || b > 100)
return rat.toFixed(2);
if (Math.abs(a / b - rat) < .01)
return `${a}:${b}`;
}
},
frameSize(elFrame, wnd) {
if (!elFrame) return;
const r = elFrame.getBoundingClientRect();
const w = Math.min(r.right, wnd.innerWidth) - Math.max(r.left, 0);
const h = Math.min(r.bottom, wnd.innerHeight) - Math.max(r.top, 0);
const x = r.left < 0 ? -r.left : 0;
const y = r.top < 0 ? -r.top : 0;
return [w, h, x, y];
},
generateScales(fit) {
let [scale, goal] = fit < 1 ? [fit, 1] : [1, fit];
const zoomStep = cfg.zoomStep / 100;
const arr = [scale];
if (fit !== 1) {
const diff = goal / scale;
const steps = Math.log(diff) / Math.log(zoomStep) | 0;
const step = steps && Math.pow(diff, 1 / steps);
for (let i = steps; --i > 0;)
arr.push((scale *= step));
arr.push(scale = goal);
}
while ((scale *= zoomStep) <= ZOOM_MAX)
arr.push(scale);
return arr;
},
measurePopup() {
let {popup: p, nwidth: nw, nheight: nh} = ai;
// overriding custom CSS to detect an unrestricted SVG that scales to the entire page
p.setAttribute('style', 'display:inline !important;' + App.popupStyleBase);
if (p.clientWidth > nw) {
const w = clamp(p.clientWidth, nw, innerWidth / 2) | 0;
nh = ai.nheight = w / nw * nh | 0;
nw = ai.nwidth = w;
p.style.cssText = `width: ${nw}px !important; height: ${nh}px !important;`;
} else
p.style.cssText = '';
p.classList.add(`${PREFIX}show`);
const s = getComputedStyle(p);
const o2 = sumProps(s.outlineOffset, s.outlineWidth) * 2;
const inw = sumProps(s.paddingLeft, s.paddingRight, s.borderLeftWidth, s.borderRightWidth);
const inh = sumProps(s.paddingTop, s.paddingBottom, s.borderTopWidth, s.borderBottomWidth);
const outw = o2 + sumProps(s.marginLeft, s.marginRight);
const outh = o2 + sumProps(s.marginTop, s.marginBottom);
ai.extras = {
inw, inh,
outw, outh,
o: o2 / 2,
w: inw + outw,
h: inh + outh,
};
const fit = Math.min(
(ai.view.w - ai.extras.w) / ai.nwidth,
(ai.view.h - ai.extras.h) / ai.nheight) || 1;
const isCustom = !cfg.fit && cfg.scales.length;
let cutoff = Math.min(1, fit);
let scaleZoom = cfg.fit === 'all' && fit || cfg.fit === 'no' && 1 || cutoff;
if (isCustom) {
const dst = [];
for (const scale of cfg.scales) {
const val = parseFloat(scale) || fit;
dst.push(val);
if (isCustom && typeof scale === 'string') {
if (scale.includes('!')) cutoff = val;
if (scale.includes('*')) scaleZoom = val;
}
}
ai.scales = dst.sort(compareNumbers).filter(Calc.scaleBiggerThan, cutoff);
} else {
ai.scales = Calc.generateScales(fit);
}
ai.scale = cfg.zoom === 'auto' ? scaleZoom : Math.min(1, fit);
ai.scaleFit = fit;
ai.scaleZoom = scaleZoom;
},
rect() {
const {node, rule} = ai;
let n = rule.rect && node.closest(rule.rect);
if (n) return n.getBoundingClientRect();
const nested = (n = node).firstElementChild ? document.elementsFromPoint(ai.cx, ai.cy) : [];
let maxArea = 0;
let maxBounds;
let i = 0;
do {
const bounds = n.getBoundingClientRect();
const area = bounds.width * bounds.height;
if (area > maxArea) {
maxArea = area;
maxBounds = bounds;
}
} while ((n = nested[i++]) && node.contains(n));
return maxBounds;
},
scaleBiggerThan(scale, i, arr) {
return scale >= this && (!i || Math.abs(scale - arr[i - 1]) > .01);
},
scaleIndex(dir) {
const i = ai.scales.indexOf(ai.scale);
if (i >= 0) return i + dir;
for (
let len = ai.scales.length,
i = dir > 0 ? 0 : len - 1;
i >= 0 && i < len;
i += dir
) {
if (Math.sign(ai.scales[i] - ai.scale) === dir)
return i;
}
return -1;
},
scaleForFirstZoom(keepScale) {
const z = ai.scaleZoom;
return keepScale || z !== ai.scale ? z : ai.scales.find(x => x > z);
},
updateViewSize() {
const view = doc.compatMode === 'BackCompat' ? doc.body : doc.documentElement;
ai.view = {w: view.clientWidth, h: view.clientHeight, x: 0, y: 0};
if (window === top) return;
const [w, h] = Calc.frameSize(frameElement, parent) || [];
if (w && h) {
ai.view = {w, h, x: 0, y: 0};
} else {
addEventListener('message', App.onMessageChild, true);
parent.postMessage(MSG.getViewSize, '*');
}
},
};
class Config {
constructor({data: c, save}) {
if (typeof c === 'string')
c = tryJSON(c);
if (typeof c !== 'object' || !c)
c = {};
const {DEFAULTS} = Config;
c.fit = ['all', 'large', 'no', ''].includes(c.fit) ? c.fit :
!(c.scales || 0).length || `${c.scales}` === `${DEFAULTS.scales}` ? 'large' :
'';
if (c.version !== DEFAULTS.version) {
if (typeof c.hosts === 'string')
c.hosts = c.hosts.split('\n')
.map(s => tryJSON(s) || s)
.filter(Boolean);
if (c.close === true || c.close === false)
c.zoomOut = c.close ? 'auto' : 'stay';
for (const key in DEFAULTS)
if (typeof c[key] !== typeof DEFAULTS[key])
c[key] = DEFAULTS[key];
if (c.version === 3 && c.scales[0] === 0)
c.scales[0] = '0!';
for (const key in c)
if (!(key in DEFAULTS))
delete c[key];
c.version = DEFAULTS.version;
if (save)
GM.setValue('cfg', c);
}
if (Object.keys(cfg || {}).some(k => /^ui|^(css|globalStatus)$/.test(k) && cfg[k] !== c[k]))
App.globalStyle = '';
if (!isArray(c.scales))
c.scales = [];
c.scales = [...new Set(c.scales)].sort((a, b) => parseFloat(a) - parseFloat(b));
Object.assign(this, DEFAULTS, c);
}
static async load(opts) {
opts.data = await GM.getValue('cfg');
return new Config(opts);
}
_getCss() {
const {css} = this;
return css.includes('{') ? css : `#${PREFIX}-popup {${css}}`;
}
}
Config.DEFAULTS = /** @type mpiv.Config */ {
__proto__: null,
center: false,
css: '',
delay: 500,
fit: '',
globalStatus: false,
// prefer ' inside rules because " will be displayed as \"
// example: "img[src*='icon']"
hosts: [{
name: 'No popup for YouTube thumbnails',
d: 'www.youtube.com',
e: 'ytd-rich-item-renderer *, ytd-thumbnail *',
s: '',
}, {
name: 'No popup for SVG/PNG icons',
d: '',
e: "img[src*='icon']",
r: '//[^/]+/.*\\bicons?\\b.*\\.(?:png|svg)',
s: '',
}],
imgtab: false,
keepOnBlur: false,
keepVids: false,
mute: false,
night: false,
preload: false,
scale: 1.05,
scales: ['0!', 0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 5, 8, 16],
start: 'auto',
startAlt: 'context',
startAltShown: false,
uiBackgroundColor: '#ffffff',
uiBackgroundOpacity: 100,
uiBorderColor: '#000000',
uiBorderOpacity: 100,
uiBorder: 0,
uiFadein: true,
uiFadeinGallery: true, // some computers show white background while loading so fading hides it
uiInfo: true,
uiInfoCaption: true,
uiInfoHide: 3,
uiInfoOnce: true,
uiShadowColor: '#000000',
uiShadowOpacity: 80,
uiShadow: 20,
uiShadowOnLoad: true,
uiPadding: 0,
uiMargin: 0,
version: 6,
videoCtrl: true,
waitLoad: false,
xhr: true,
zoom: 'context',
zoomOut: 'auto',
zoomStep: 133,
};
const CspSniffer = {
/** @type {?Object<string,string[]>} */
csp: null,
selfUrl: location.origin + '/',
// will be null when done
init() {
this.busy = new Promise(resolve => {
const xhr = new XMLHttpRequest();
xhr.open('get', location);
xhr.timeout = Math.max(2000, (performance.timing.responseEnd - performance.timeOrigin) * 2);
xhr.onreadystatechange = () => {
if (xhr.readyState >= xhr.HEADERS_RECEIVED) {
this.csp = this._parse([
xhr.getResponseHeader('content-security-policy'),
$prop('meta[http-equiv="Content-Security-Policy"]', 'content'),
].filter(Boolean).join(','));
this.init = this.busy = xhr.onreadystatechange = null;
xhr.abort();
resolve();
}
};
xhr.send();
});
},
async check(url, allowInit) {
if (allowInit && this.init) this.init();
if (this.busy) await this.busy;
const isVideo = Util.isVideoUrl(url);
let mode;
if (this.csp) {
const src = this.csp[isVideo ? 'media' : 'img'];
if (!src.some(this._srcMatches, url))
mode = [mode, 'blob', 'data'].find(m => src.includes(`${m}:`));
}
return [mode || ai.xhr, isVideo];
},
_parse(csp) {
if (!csp) return;
const src = {};
const rx = /(?:^|[;,])\s*(?:(default|img|media|script)-src|require-(trusted)-types-for) ([^;,]+)/g;
for (let m; (m = rx.exec(csp));)
src[m[1] || m[2]] = m[3].trim().split(/\s+/);
if ((src.script || []).find(s => /^'nonce-(.+)'$/.test(s)))
nonce = RegExp.$1;
if ((src.trusted || []).includes("'script'"))
App.NOP = () => {};
if (!src.img) src.img = src.default || [];
if (!src.media) src.media = src.default || [];
for (const set of [src.img, src.media]) {
set.forEach((item, i) => {
if (item !== '*' && item.includes('*')) {
set[i] = new RegExp(
(/^\w+:/.test(item) ? '^' : '^\\w+://') +
item
.replace(/[.+?^$|()[\]{}]/g, '\\$&')
.replace(/(\\\.)?(\*)(\\\.)?/g, (_, a, b, c) =>
`${a ? '\\.?' : ''}[^:/]*${c ? '\\.?' : ''}`)
.replace(/[^/]$/, '$&/'));
}
});
}
return src;
},
/** @this string */
_srcMatches(src) {
return src instanceof RegExp ? src.test(this) :
src === '*' ||
src && this.startsWith(src) && (src.endsWith('/') || this[src.length] === '/') ||
src === "'self'" && this.startsWith(CspSniffer.selfUrl);
},
};
const Events = {
ctrl: false,
hoverData: null,
hoverTimer: 0,
ignoreKeyHeld: false,
onMouseOver(e) {
let node = e.target;
Events.ignoreKeyHeld = e.shiftKey;
if (!App.isEnabled ||
e.shiftKey ||
ai.zoomed ||
node === ai.popup ||
node === doc.body ||
node === doc.documentElement ||
node === elSetup ||
ai.gallery && ai.rectHovered ||
!App.canClose())
return;
if (node.shadowRoot)
node = Events.pierceShadow(node, e.clientX, e.clientY);
// we don't want to process everything in the path of a quickly moving mouse cursor
Events.hoverData = {e, node, start: now()};
Events.hoverTimer = Events.hoverTimer || setTimeout(Events.onMouseOverThrottled, SETTLE_TIME);
node.addEventListener('mouseout', Events.onMouseOutThrottled);
},
onMouseOverThrottled(force) {
const {start, e, node, nodeOut} = Events.hoverData || {};
if (!node || node === nodeOut && (Events.hoverData = null, 1))
return;
// clearTimeout + setTimeout is expensive so we'll use the cheaper perf.now() for rescheduling
const wait = force ? 0 : start + SETTLE_TIME - now();
const t = Events.hoverTimer = wait > 10 && setTimeout(Events.onMouseOverThrottled, wait);
if (t)
return;
Events.hoverData = null;
if (!Ruler.rules)
Ruler.init();
const info = RuleMatcher.adaptiveFind(node);
if (info && info.url && info.node !== ai.node)
App.activate(info, e);
},
onMouseOut(e) {
if (!e.relatedTarget && !cfg.keepOnBlur && !e.shiftKey && App.canClose())
App.deactivate();
},
onMouseOutThrottled(e) {
const d = Events.hoverData;
if (d) d.nodeOut = this;
this.removeEventListener('mouseout', Events.onMouseOutThrottled);
Events.hoverTimer = 0;
},
onMouseOutShadow(e) {
const root = e.target.shadowRoot;
if (root) {
root.removeEventListener('mouseover', Events.onMouseOver);
root.removeEventListener('mouseout', Events.onMouseOutShadow);
}
},
onMouseMove(e) {
Events.trackMouse(e);
if (e.shiftKey)
return;
if (!ai.zoomed && !ai.rectHovered && App.canClose()) {
App.deactivate();
} else if (ai.zoomed) {
Popup.move();
const {cx, cy, view: {w, h}} = ai;
const bx = w / 6;
const by = h / 6;
const onEdge = cx < bx || cx > w - bx || cy < by || cy > h - by;
Status.set(`${onEdge ? '+' : '-'}edge`);
}
},
onMouseDown({shiftKey, button, target}) {
if (!button && target === ai.popup && ai.popup.controls && (shiftKey || !App.canClose())) {
ai.controlled = ai.zoomed = true;
} else if (button === 2 || shiftKey) {
// Shift = ignore; RMB will be processed in onContext
} else {
App.deactivate({wait: true});
doc.addEventListener('mouseup', App.enable, {once: true});
}
},
onMouseScroll(e) {
const dir = (e.deltaY || -e.wheelDelta) < 0 ? 1 : -1;
if (ai.zoomed) {
Events.zoomInOut(dir);
} else if (ai.gNum > 1 && ai.popup) {
Gallery.next(-dir);
} else if (cfg.zoom === 'wheel' && dir > 0 && ai.popup) {
App.toggleZoom();
} else if (App.canClose()) {
App.deactivate();
return;
}
dropEvent(e);
},
onKeyDown(e) {
// Synthesized events may be of the wrong type and not have a `key`
const key = describeKey(e);
const p = ai.popupShown;
if (!p && key === '^Control') {
addEventListener('keyup', Events.onKeyUp, true);
Events.ctrl = true;
}
if (!p && key === '^ContextMenu')
return Events.onContext.call(this, e);
if (!p || e.repeat)
return;
switch (key) {
case '+Shift':
if (ai.shiftKeyTime)
return;
ai.shiftKeyTime = now();
Status.set('+shift');
if (cfg.uiInfo)
Bar.show(1);
if (isVideo(p))
p.controls = true;
return;
case 'KeyA':
p.toggleAttribute(NOAA_ATTR);
break;
case 'ArrowRight':
case 'KeyJ':
Gallery.next(1);
break;
case 'ArrowLeft':
case 'KeyK':
Gallery.next(-1);
break;
case 'KeyC':
if (ai.bar.firstChild) {
Bar.setText('');
Bar.hide(0);
} else {
Bar.setText(ai.barText);
Bar.show(2);
}
break;
case 'KeyD':
Req.saveFile();
break;
case 'KeyF':
if (p !== document.fullscreenElement) p.requestFullscreen();
else document.exitFullscreen();
break;
case 'KeyH': // flip horizontally
case 'KeyV': // flip vertically
case 'KeyL': // rotate left
case 'KeyR': // rotate right
if (!p)