oxjs/source/Ox.js

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'use strict';
// Ox.js Developer Version
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/*
Usage:
Ox.load(callback)
Ox.load(module, callback)
Ox.load(module, options, callback)
Ox.load({module: options, module: options}, callback)
*/
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window.Ox = {
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load: function() {
var args = arguments,
callback = args[args.length - 1],
path = getPath();
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loadJSON(function(data) {
loadScripts(data, function() {
if (args.length == 1) {
callback()
} else {
Ox.load.apply(null, args);
}
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});
});
function getPath() {
var i, path, scripts = document.getElementsByTagName('script');
for (i = 0; i < scripts.length; i++) {
if (/Ox\.js$/.test(scripts[i].src)) {
path = scripts[i].src.replace(/Ox\.js$/, '');
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}
}
return path;
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}
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function loadJSON(callback) {
var req = new XMLHttpRequest();
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req.open(
'GET',
path + 'Ox/json/Ox.json?' + Math.floor(Math.random() * 1000000),
true
);
req.onreadystatechange = function() {
if (req.readyState == 4) {
if (req.status == 200) {
callback(JSON.parse(req.responseText));
} else {
// ...
}
}
};
req.send();
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}
function loadScripts(scripts, callback) {
loadScriptsOrdered(scripts[0], function() {
loadScriptsUnordered(scripts[1], function() {
loadScriptsUnordered(scripts[2], callback);
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});
});
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}
function loadScriptsOrdered(scripts, callback) {
loadScript(scripts.shift(), function() {
if (scripts.length) {
loadScriptsOrdered(scripts, callback);
} else {
callback();
}
});
}
function loadScriptsUnordered(scripts, callback) {
var counter = 0, i, length = scripts.length;
for (i = 0; i < length; i++) {
loadScript(scripts[i], function() {
++counter == length && callback();
});
}
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}
function loadScript(script, callback) {
var element = document.createElement('script'),
head = document.head || document.getElementsByTagName( "head" )[0] || document.documentElement;
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if (/MSIE/.test(navigator.userAgent)) {
// fixme: find a way to check if css/js have loaded in msie
setTimeout(callback, 2500);
} else {
element.onload = callback;
}
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element.src = path + script + '?' + parseInt(Math.random() * 1000000);
element.type = 'text/javascript';
head.appendChild(element);
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}
}
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};