mirror of
https://github.com/socketio/socket.io.git
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123 lines
1.9 KiB
JavaScript
123 lines
1.9 KiB
JavaScript
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/**
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* Status of page load.
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*/
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var pageLoaded = false;
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/**
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* Inheritance.
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*
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* @param {Function} ctor a
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* @param {Function} ctor b
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* @api private
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*/
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exports.inherits = function inherits (a, b) {
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function c () { }
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c.prototype = b.prototype;
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a.prototype = new c;
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};
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/**
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* Object.keys
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*/
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exports.keys = Object.keys || function (obj) {
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var ret = [];
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var has = Object.prototype.hasOwnProperty;
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for (var i in obj) {
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if (has.call(obj, i)) {
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ret.push(i);
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}
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}
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return ret;
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};
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/**
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* Adds an event.
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*
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* @api private
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*/
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exports.on = function (element, event, fn, capture) {
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if (element.attachEvent) {
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element.attachEvent('on' + event, fn);
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} else if (element.addEventListener) {
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element.addEventListener(event, fn, capture);
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}
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};
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/**
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* Load utility.
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*
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* @api private
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*/
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exports.load = function (fn) {
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if (global.document && document.readyState === 'complete' || pageLoaded) {
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return fn();
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}
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exports.on(global, 'load', fn, false);
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};
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/**
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* Change the internal pageLoaded value.
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*/
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if ('undefined' != typeof window) {
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exports.load(function () {
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pageLoaded = true;
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});
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}
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/**
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* UA / engines detection namespace.
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*
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* @namespace
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*/
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exports.ua = {};
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/**
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* Detect webkit.
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*
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* @api private
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*/
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exports.ua.webkit = 'undefined' != typeof navigator &&
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/webkit/i.test(navigator.userAgent);
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/**
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* Detect gecko.
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*
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* @api private
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*/
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exports.ua.gecko = 'undefined' != typeof navigator &&
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/gecko/i.test(navigator.userAgent);
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/**
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* Detect android;
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*/
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exports.ua.android = 'undefined' != typeof navigator &&
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/android/i.test(navigator.userAgent);
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/**
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* Detect iOS.
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*/
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exports.ua.ios = 'undefined' != typeof navigator &&
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/^(iPad|iPhone|iPod)$/.test(navigator.platform);
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exports.ua.ios6 = exports.ua.ios && /OS 6_/.test(navigator.userAgent);
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/**
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* Detect Chrome Frame.
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*/
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exports.ua.chromeframe = Boolean(global.externalHost);
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