@novnc/novnc
Version:
An HTML5 VNC client
239 lines (227 loc) • 20.2 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.hasScrollbarGutter = exports.dragThreshold = void 0;
exports.isAndroid = isAndroid;
exports.isBlink = isBlink;
exports.isChrome = isChrome;
exports.isChromeOS = isChromeOS;
exports.isChromium = isChromium;
exports.isEdge = isEdge;
exports.isFirefox = isFirefox;
exports.isGecko = isGecko;
exports.isIOS = isIOS;
exports.isMac = isMac;
exports.isOpera = isOpera;
exports.isSafari = isSafari;
exports.isTouchDevice = void 0;
exports.isWebKit = isWebKit;
exports.isWindows = isWindows;
exports.supportsWebCodecsH264Decode = exports.supportsCursorURIs = void 0;
var Log = _interopRequireWildcard(require("./logging.js"));
var _base = _interopRequireDefault(require("../base64.js"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
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function _asyncToGenerator(n) { return function () { var t = this, e = arguments; return new Promise(function (r, o) { var a = n.apply(t, e); function _next(n) { asyncGeneratorStep(a, r, o, _next, _throw, "next", n); } function _throw(n) { asyncGeneratorStep(a, r, o, _next, _throw, "throw", n); } _next(void 0); }); }; } /*
* noVNC: HTML5 VNC client
* Copyright (C) 2019 The noVNC authors
* Licensed under MPL 2.0 (see LICENSE.txt)
*
* See README.md for usage and integration instructions.
*
* Browser feature support detection
*/
// Touch detection
var isTouchDevice = exports.isTouchDevice = 'ontouchstart' in document.documentElement ||
// required for Chrome debugger
document.ontouchstart !== undefined ||
// required for MS Surface
navigator.maxTouchPoints > 0 || navigator.msMaxTouchPoints > 0;
window.addEventListener('touchstart', function onFirstTouch() {
exports.isTouchDevice = isTouchDevice = true;
window.removeEventListener('touchstart', onFirstTouch, false);
}, false);
// The goal is to find a certain physical width, the devicePixelRatio
// brings us a bit closer but is not optimal.
var dragThreshold = exports.dragThreshold = 10 * (window.devicePixelRatio || 1);
var _supportsCursorURIs = false;
try {
var target = document.createElement('canvas');
target.style.cursor = 'url("data:image/x-icon;base64,AAACAAEACAgAAAIAAgA4AQAAFgAAACgAAAAIAAAAEAAAAAEAIAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////AAAAAAAAAAAAAAAAAAAAAA==") 2 2, default';
if (target.style.cursor.indexOf("url") === 0) {
Log.Info("Data URI scheme cursor supported");
_supportsCursorURIs = true;
} else {
Log.Warn("Data URI scheme cursor not supported");
}
} catch (exc) {
Log.Error("Data URI scheme cursor test exception: " + exc);
}
var supportsCursorURIs = exports.supportsCursorURIs = _supportsCursorURIs;
var _hasScrollbarGutter = true;
try {
// Create invisible container
var container = document.createElement('div');
container.style.visibility = 'hidden';
container.style.overflow = 'scroll'; // forcing scrollbars
document.body.appendChild(container);
// Create a div and place it in the container
var child = document.createElement('div');
container.appendChild(child);
// Calculate the difference between the container's full width
// and the child's width - the difference is the scrollbars
var scrollbarWidth = container.offsetWidth - child.offsetWidth;
// Clean up
container.parentNode.removeChild(container);
_hasScrollbarGutter = scrollbarWidth != 0;
} catch (exc) {
Log.Error("Scrollbar test exception: " + exc);
}
var hasScrollbarGutter = exports.hasScrollbarGutter = _hasScrollbarGutter;
var supportsWebCodecsH264Decode = exports.supportsWebCodecsH264Decode = false;
function _checkWebCodecsH264DecodeSupport() {
return _checkWebCodecsH264DecodeSupport2.apply(this, arguments);
}
function _checkWebCodecsH264DecodeSupport2() {
_checkWebCodecsH264DecodeSupport2 = _asyncToGenerator(/*#__PURE__*/_regeneratorRuntime().mark(function _callee() {
var config, support, data, gotframe, _error, decoder, chunk;
return _regeneratorRuntime().wrap(function _callee$(_context) {
while (1) switch (_context.prev = _context.next) {
case 0:
if ('VideoDecoder' in window) {
_context.next = 2;
break;
}
return _context.abrupt("return", false);
case 2:
// We'll need to make do with some placeholders here
config = {
codec: 'avc1.42401f',
codedWidth: 1920,
codedHeight: 1080,
optimizeForLatency: true
};
_context.next = 5;
return VideoDecoder.isConfigSupported(config);
case 5:
support = _context.sent;
if (support.supported) {
_context.next = 8;
break;
}
return _context.abrupt("return", false);
case 8:
// Firefox incorrectly reports supports for H.264 under some
// circumstances, so we need to actually test a real frame
// https://bugzilla.mozilla.org/show_bug.cgi?id=1932392
data = new Uint8Array(_base["default"].decode('AAAAAWdCwBTZnpuAgICgAAADACAAAAZB4oVNAAAAAWjJYyyAAAABBgX//4Hc' + 'Rem95tlIt5Ys2CDZI+7veDI2NCAtIGNvcmUgMTY0IHIzMTA4IDMxZTE5Zjkg' + 'LSBILjI2NC9NUEVHLTQgQVZDIGNvZGVjIC0gQ29weWxlZnQgMjAwMy0yMDIz' + 'IC0gaHR0cDovL3d3dy52aWRlb2xhbi5vcmcveDI2NC5odG1sIC0gb3B0aW9u' + 'czogY2FiYWM9MCByZWY9NSBkZWJsb2NrPTE6MDowIGFuYWx5c2U9MHgxOjB4' + 'MTExIG1lPWhleCBzdWJtZT04IHBzeT0xIHBzeV9yZD0xLjAwOjAuMDAgbWl4' + 'ZWRfcmVmPTEgbWVfcmFuZ2U9MTYgY2hyb21hX21lPTEgdHJlbGxpcz0yIDh4' + 'OGRjdD0wIGNxbT0wIGRlYWR6b25lPTIxLDExIGZhc3RfcHNraXA9MSBjaHJv' + 'bWFfcXBfb2Zmc2V0PS0yIHRocmVhZHM9MSBsb29rYWhlYWRfdGhyZWFkcz0x' + 'IHNsaWNlZF90aHJlYWRzPTAgbnI9MCBkZWNpbWF0ZT0xIGludGVybGFjZWQ9' + 'MCBibHVyYXlfY29tcGF0PTAgY29uc3RyYWluZWRfaW50cmE9MCBiZnJhbWVz' + 'PTAgd2VpZ2h0cD0wIGtleWludD1pbmZpbml0ZSBrZXlpbnRfbWluPTI1IHNj' + 'ZW5lY3V0PTQwIGludHJhX3JlZnJlc2g9MCByY19sb29rYWhlYWQ9NTAgcmM9' + 'YWJyIG1idHJlZT0xIGJpdHJhdGU9NDAwIHJhdGV0b2w9MS4wIHFjb21wPTAu' + 'NjAgcXBtaW49MCBxcG1heD02OSBxcHN0ZXA9NCBpcF9yYXRpbz0xLjQwIGFx' + 'PTE6MS4wMACAAAABZYiEBrxmKAAPVccAAS044AA5DRJMnkycJk4TPw=='));
gotframe = false;
_error = null;
decoder = new VideoDecoder({
output: function output(frame) {
gotframe = true;
},
error: function error(e) {
_error = e;
}
});
chunk = new EncodedVideoChunk({
timestamp: 0,
type: 'key',
data: data
});
decoder.configure(config);
decoder.decode(chunk);
_context.prev = 15;
_context.next = 18;
return decoder.flush();
case 18:
_context.next = 23;
break;
case 20:
_context.prev = 20;
_context.t0 = _context["catch"](15);
// Firefox incorrectly throws an exception here
// https://bugzilla.mozilla.org/show_bug.cgi?id=1932566
_error = _context.t0;
case 23:
if (gotframe) {
_context.next = 25;
break;
}
return _context.abrupt("return", false);
case 25:
if (!(_error !== null)) {
_context.next = 27;
break;
}
return _context.abrupt("return", false);
case 27:
return _context.abrupt("return", true);
case 28:
case "end":
return _context.stop();
}
}, _callee, null, [[15, 20]]);
}));
return _checkWebCodecsH264DecodeSupport2.apply(this, arguments);
}
exports.supportsWebCodecsH264Decode = supportsWebCodecsH264Decode = await _checkWebCodecsH264DecodeSupport();
/*
* The functions for detection of platforms and browsers below are exported
* but the use of these should be minimized as much as possible.
*
* It's better to use feature detection than platform detection.
*/
/* OS */
function isMac() {
return !!/mac/i.exec(navigator.platform);
}
function isWindows() {
return !!/win/i.exec(navigator.platform);
}
function isIOS() {
return !!/ipad/i.exec(navigator.platform) || !!/iphone/i.exec(navigator.platform) || !!/ipod/i.exec(navigator.platform);
}
function isAndroid() {
/* Android sets navigator.platform to Linux :/ */
return !!navigator.userAgent.match('Android ');
}
function isChromeOS() {
/* ChromeOS sets navigator.platform to Linux :/ */
return !!navigator.userAgent.match(' CrOS ');
}
/* Browser */
function isSafari() {
return !!navigator.userAgent.match('Safari/...') && !navigator.userAgent.match('Chrome/...') && !navigator.userAgent.match('Chromium/...') && !navigator.userAgent.match('Epiphany/...');
}
function isFirefox() {
return !!navigator.userAgent.match('Firefox/...') && !navigator.userAgent.match('Seamonkey/...');
}
function isChrome() {
return !!navigator.userAgent.match('Chrome/...') && !navigator.userAgent.match('Chromium/...') && !navigator.userAgent.match('Edg/...') && !navigator.userAgent.match('OPR/...');
}
function isChromium() {
return !!navigator.userAgent.match('Chromium/...');
}
function isOpera() {
return !!navigator.userAgent.match('OPR/...');
}
function isEdge() {
return !!navigator.userAgent.match('Edg/...');
}
/* Engine */
function isGecko() {
return !!navigator.userAgent.match('Gecko/...');
}
function isWebKit() {
return !!navigator.userAgent.match('AppleWebKit/...') && !navigator.userAgent.match('Chrome/...');
}
function isBlink() {
return !!navigator.userAgent.match('Chrome/...');
}