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loader.js
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/*
Important polyfills for compatibility with older browsers.
Array.prototype.indexOf
Object.create
Function.prototype.bind
*/
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function (item, start) {
if (!start) {
start = 0;
}
var len = this.length;
var i;
for (i=start; i<len; i++) {
if (this[i] === item) {
return i;
}
}
return -1;
}
}
if (!Object.create) {
Object.create = (function () {
function F() {};
return function (o) {
if (arguments.length != 1) {
throw new Error('Object.create implementation only accepts one parameter.');
}
F.prototype = o;
return new F();
}
})();
}
if (!Function.prototype.bind) {
Function.prototype.bind = function (oThis) {
if (typeof this !== "function") {
// closest thing possible to the ECMAScript 5 internal IsCallable function
throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
}
var aArgs = Array.prototype.slice.call(arguments, 1),
fToBind = this,
fNOP = function () {},
fBound = function () {
return fToBind.apply(this instanceof fNOP && oThis ? this : oThis,
aArgs.concat(Array.prototype.slice.call(arguments)));
};
fNOP.prototype = this.prototype;
fBound.prototype = new fNOP();
return fBound;
};
}
var $loader = {
_ie: false,
_ieVersion: null,
_embedCounter: null,
_modules: {},
_loaderStart: null,
_cacheVersion: NOMBO_CACHE_VERSION,
_appDefinition: null,
_resources: null,
_resourceIDs: null,
_resourcesLoaded: null,
_deepResources: null,
_deepResourcesLoaded: null,
_resourcesLoadedMap: null,
_waitForReadyInterval: null,
_attempts: null,
_booting: true,
_domReady: false,
ready: function (callback) {
if ($loader._domReady) {
callback($loader._appDefinition);
} else {
$loader.on('ready', callback);
if (!$loader._waitForReadyInterval) {
$loader._waitForReadyInterval = setInterval($loader._waitForReady, 20);
}
}
},
progress: function (callback) {
$loader.on('progress', callback);
},
init: function (appDefinition, resources) {
$loader._resources = [];
$loader._appDefinition = appDefinition;
if ($loader._appDefinition.appStyleBundleURL) {
$loader._resources.push($loader._appDefinition.appStyleBundleURL);
}
if ($loader._appDefinition.frameworkCoreBundleURL) {
$loader._resources.push($loader._appDefinition.frameworkCoreBundleURL);
}
if ($loader._appDefinition.appLibBundleURL) {
$loader._resources.push($loader._appDefinition.appLibBundleURL);
}
if ($loader._appDefinition.appTemplateBundleURL) {
$loader._resources.push($loader._appDefinition.appTemplateBundleURL);
}
if ($loader._appDefinition.appScriptBundleURL) {
$loader._resources.push($loader._appDefinition.appScriptBundleURL);
}
if (resources) {
$loader._resources = $loader._resources.concat(resources);
}
$loader._appDefinition.resources = $loader._resources;
if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) {
$loader._ie = true;
$loader._ieVersion = new Number(RegExp.$1);
}
$loader.grab.init(appDefinition);
},
EventEmitter: function () {
var self = this;
self._eventMap = {};
self.on = function () {
var event = arguments[0];
var handler = arguments[1];
if (!self._eventMap.hasOwnProperty(event)) {
self._eventMap[event] = [];
}
self._eventMap[event].push(handler);
}
self.off = function () {
var event = arguments[0];
var handler = arguments[1];
if (self._eventMap[event]) {
if (handler) {
var i;
var newArray = [];
for (i in self._eventMap[event]) {
if (self._eventMap[event][i] != handler) {
newArray.push(self._eventMap[event][i]);
}
}
if (newArray.length > 0) {
self._eventMap[event] = newArray;
} else {
delete self._eventMap[event];
}
} else {
delete self._eventMap[event];
}
}
}
self.once = function () {
var event = arguments[0];
var handler = arguments[1];
var hdlr = function (data) {
self.off(event, hdlr);
handler(data);
}
self.on(event, hdlr);
}
self.emit = function () {
var event = arguments[0];
var data = arguments[1];
if (self._eventMap[event]) {
var events = self._eventMap[event].slice();
var i;
var len = events.length;
for (i=0; i<len; i++) {
events[i](data);
}
}
}
self.numListeners = function (event) {
if (self._eventMap[event]) {
var count = 0;
var i;
for (i in self._eventMap[event]) {
count++;
}
return count;
}
return 0;
}
},
getAppDefinition: function () {
return $loader._appDefinition;
},
_embedAllResources: function () {
$loader.grab._processEmbedQueue();
},
_waitForReady: function () {
var head = document.getElementsByTagName('head')[0];
if (head && document.body && $loader._appDefinition) {
$loader._domReady = true;
clearInterval($loader._waitForReadyInterval);
$loader.emit('ready', $loader._appDefinition);
}
},
_globalEval: function (src, sourceURL) {
if (sourceURL) {
src += '\n//# sourceURL=' + sourceURL + '\n';
}
if (window.execScript) {
window.execScript(src);
} else {
window.eval.call(window, src);
}
},
_resourceEmbedQueue: [],
loadAll: function (callback) {
var i;
var numLoaded = 0;
var triggeredLoadAllFail = false;
var len = $loader._resources.length;
for (i=0; i<len; i++) {
$loader.grab._loadResource($loader._resources[i], function (err) {
if (err) {
if (!triggeredLoadAllFail) {
triggeredLoadAllFail = true;
$loader._loadAllFail();
}
} else {
if (++numLoaded >= $loader._resources.length) {
$loader._booting = false;
callback && callback();
$loader.emit('loadall');
}
}
});
}
},
_loadAllFail: function () {
$loader.emit('loadallfail');
},
finish: function () {
if ($loader.grab._options.releaseMode) {
NOMBO_SESSION_MANAGER.markAsCached();
}
$loader._embedAllResources();
},
ajax: function (settings) {
var type;
if (settings.type) {
type = settings.type;
} else {
type = "GET";
}
var xmlhttp = $loader._getHTTPReqObject();
if (settings.progress && navigator.userAgent.indexOf("Opera") < 0) {
xmlhttp.onprogress = settings.progress;
}
xmlhttp.open(type, settings.url, true);
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4) {
if (xmlhttp.status == 200) {
if (settings.success) {
settings.success(xmlhttp.responseText);
}
} else {
if (settings.error) {
settings.error(xmlhttp.statusText);
} else {
throw "Failed to load resource: " + url;
}
}
}
}
xmlhttp.send(null);
},
_getHTTPReqObject: function () {
var xmlhttp = null;
if ($loader._ie && $loader._ieVersion < 7) {
try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (exceptionA) {
try {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (exceptionB) {
xmlhttp = null;
}
}
}
if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
try {
xmlhttp = new XMLHttpRequest();
} catch (e) {
xmlhttp = null;
}
}
if (!xmlhttp) {
throw "Could not instantiate XMLHttpRequest";
}
return xmlhttp;
},
grab: new (function () {
var self = this;
this._options = {};
this._callbacks = {
ready: [],
fail: []
};
this._activeScripts = new Object();
this._activeCSS = new Object();
this._resources = [];
this._resourcesLoaded = [];
this._resourcesGrabbed = [];
this._resourcesLoadedMap = {};
this._loadableResourceMap = {};
this._deepResources = {};
this._deepResourcesLoaded = {};
this._scriptCodes = {};
this._styleCodes = {};
this._embedQueue = [];
this._windowsFileSepRegex = /\\/g;
this._doubleSlashRegex = /\/\//g;
this._extRegex = /[.][^\/\\]*$/;
this._jsExtRegex = /[.]js$/;
this._mainScriptPrefixRegex = /^(\/)/;
this._cssURLRegex = /([^A-Za-z0-9]|^)url[(][ ]*["']?([^"')]*)["']?[ ]*[)]/g;
this._resourceSizeTotal = 0;
this.init = function (options) {
self._options = options;
self._appScriptsRegex = new RegExp('^' + self._options.appScriptsURL);
self._frameworkScriptsRegex = new RegExp('^' + self._options.frameworkScriptsURL);
var resourceSizeMap = options.resourceSizeMap;
for (i in resourceSizeMap) {
self._resourceSizeTotal += resourceSizeMap[i];
}
};
this._normalizeArray = function (parts, allowAboveRoot) {
// if the path tries to go above the root, 'up' ends up > 0
var up = 0;
for (var i = parts.length - 1; i >= 0; i--) {
var last = parts[i];
if (last === '.') {
parts.splice(i, 1);
} else if (last === '..') {
parts.splice(i, 1);
up++;
} else if (up) {
parts.splice(i, 1);
up--;
}
}
// if the path is allowed to go above the root, restore leading ..s
if (allowAboveRoot) {
for (; up--; up) {
parts.unshift('..');
}
}
return parts;
};
this.normalizeURL = function (url) {
url = url.replace(this._windowsFileSepRegex, '/')
.replace(this._doubleSlashRegex, '/');
var parts = url.split('/');
return self._normalizeArray(parts, true).join('/');
};
this._triggerReady = function () {
var callbacks = self._callbacks['ready'];
self._callbacks['ready'] = [];
if (callbacks.length > 0) {
self._execReadyCallbacks(callbacks);
}
};
this._execReadyCallbacks = function (callbacks) {
var len = callbacks.length;
var i;
for (i=len-1; i>=0; i--) {
callbacks[i]();
}
};
this._triggerFail = function (url) {
var len = self._callbacks['fail'].length;
var i;
for (i=0; i<len; i++) {
self._callbacks['fail'][i](url);
}
};
/**
Bind a callback function to Nombo's ready event. The specified function will be called when Nombo is ready to begin processing.
*/
this.ready = function (callback) {
if (!self.isGrabbing()) {
callback();
} else {
self._callbacks['ready'].push(callback);
}
};
/**
Bind a callback function to Nombo's fail event. The specified function will be called when Nombo fails to load a resource.
The callback can accept a parameter which indicates the URL of the resource which failed to load.
*/
this.fail = function (callback) {
self._callbacks['fail'].push(callback);
};
this._addFileExtension = function (url, defaultExtension) {
if (self._extRegex.test(url)) {
return url;
}
return url + '.' + defaultExtension;
};
this.app = {
script: function (name) {
return self.script(self._options.appScriptsURL + name);
},
lib: function (name, callback) {
if (self._extRegex.test(name)) {
var resourceName = self._options.appLibsURL + name;
} else {
var resourceName = self._options.appLibsURL + name + '.js';
}
self.lib(resourceName, callback);
},
style: function (name, callback) {
if (self._extRegex.test(name)) {
var resourceName = self._options.appStylesURL + name;
} else {
var resourceName = self._options.appStylesURL + name + '.css';
}
self.style(resourceName, callback);
},
template: function (name) {
var tmplDirURL = $loader._appDefinition.appTemplatesURL;
if (self._extRegex.test(name)) {
var resourceName = tmplDirURL + name;
} else {
var resourceName = tmplDirURL + name + '.html';
}
return self.template(resourceName);
},
templateURL: function (name) {
name = self._addFileExtension(name, 'html');
return self.url($loader._appDefinition.appTemplatesURL + name);
},
styleURL: function (name) {
name = self._addFileExtension(name, 'css');
return self.url(self._options.appStylesURL + name);
},
assetURL: function (nameWithExtension, fresh) {
return self.url(self._options.appAssetsURL + nameWithExtension, fresh);
},
fileURL: function (nameWithExtension, fresh) {
return self.url(self._options.appFilesURL + nameWithExtension, fresh);
}
};
this.framework = {
script: function (name) {
return self.script(self._options.frameworkScriptsURL + name);
},
lib: function (name, callback) {
if (self._extRegex.test(name)) {
var resourceName = self._options.frameworkLibsURL + name;
} else {
var resourceName = self._options.frameworkLibsURL + name + '.js';
}
self.lib(resourceName, callback);
},
style: function (name, callback) {
if (self._extRegex.test(name)) {
var resourceName = self._options.frameworkStylesURL + name;
} else {
var resourceName = self._options.frameworkStylesURL + name + '.css';
}
self.style(resourceName, callback);
},
plugin: function (name, callback) {
if (self._extRegex.test(name)) {
var resourceName = self._options.frameworkPluginsURL + name;
} else {
var resourceName = self._options.frameworkPluginsURL + name + '.js';
}
self.lib(resourceName, callback);
},
styleURL: function (name) {
name = self._addFileExtension(name, 'css');
return self.url(self._options.frameworkStylesURL + name);
},
assetURL: function (nameWithExtension, fresh) {
return self.url(self._options.frameworkAssetsURL + nameWithExtension, fresh);
}
},
this.script = function (resourceName) {
resourceName = self.normalizeURL(resourceName);
if (!self._extRegex.test(resourceName)) {
resourceName += '.js';
}
var requireName = '/' + (resourceName
.replace(self._frameworkScriptsRegex, self._options.relativeFrameworkScriptsPath + '/')
.replace(self._appScriptsRegex, '')
.replace(self._mainScriptPrefixRegex, '')
.replace(self._jsExtRegex, ''));
var bundledModule = require(requireName);
if (bundledModule != null) {
return bundledModule;
}
if (self._loadableResourceMap.hasOwnProperty(resourceName)) {
return self._loadableResourceMap[resourceName];
}
var scr = new $loader.Script(resourceName);
scr.loader.grab();
self._loadableResourceMap[resourceName] = scr;
return scr;
};
this.lib = function (resourceName, callback) {
resourceName = self.normalizeURL(resourceName);
if (self._activeScripts[resourceName]) {
callback(null, resourceName);
} else {
self.loadAndEmbedScript(resourceName, callback);
self._activeScripts[resourceName] = true;
}
};
this.style = function (resourceName, callback) {
resourceName = self.normalizeURL(resourceName);
if (self._activeCSS[resourceName]) {
callback(null, resourceName);
} else {
self.loadAndEmbedCSS(resourceName, callback);
self._activeCSS[resourceName] = true;
}
};
this.template = function (resourceName) {
resourceName = self.normalizeURL(resourceName);
if (self._loadableResourceMap.hasOwnProperty(resourceName)) {
return self._loadableResourceMap[resourceName];
}
var templ = new $loader.Template(resourceName);
templ.loader.grab();
self._loadableResourceMap[resourceName] = templ;
return templ;
};
this.url = function (url, fresh) {
url = self.normalizeURL(url);
if (fresh) {
return url;
} else {
return NOMBO_CACHE_MANAGER.setURLCacheVersion(url);
}
};
/**
Get the the image at the given URL and start downloading it.
*/
this.image = function () {
var url = arguments[0];
var callback = null;
var fresh = null;
if (arguments[1] instanceof Function) {
callback = arguments[1];
} else {
fresh = arguments[1];
if (arguments[2]) {
callback = arguments[2];
}
}
url = self.url(url, fresh);
var img = new Image();
if (callback) {
img.onload = function () {
callback(null, url);
}
}
img.src = url;
return img;
};
this._processEmbedQueue = function () {
var curTag;
if (self._embedQueue.length > 0) {
curTag = self._embedQueue[0];
if (curTag.ready) {
self._embedQueue.shift();
if (curTag.type == 'link') {
if (!$loader._ie || $loader._ieVersion > 8) {
self.styleTag(self._styleCodes[curTag.url], 'text/css');
} else {
self.linkTag(curTag.url, 'text/css', 'stylesheet', curTag.query);
}
self._resourcesGrabbed.push(curTag.url);
if (curTag.callback) {
curTag.callback(curTag.error, curTag.url);
}
if (!self.isGrabbing()) {
self._triggerReady();
}
self._processEmbedQueue();
} else if (curTag.type == 'script') {
if (curTag.error) {
self._resourcesGrabbed.push(curTag.url);
if (curTag.callback) {
curTag.callback(curTag.error, curTag.url);
}
if (!self.isGrabbing()) {
self._triggerReady();
}
self._processEmbedQueue();
} else {
$loader._globalEval(self._scriptCodes[curTag.url], curTag.url);
self._resourcesGrabbed.push(curTag.url);
if (curTag.callback) {
curTag.callback(curTag.error, curTag.url);
}
if (!self.isGrabbing()) {
self._triggerReady();
}
self._processEmbedQueue();
}
}
}
}
};
this._loadResource = function (url, callback) {
var ext = url.match(/[.][^.]*$/);
var tagData;
if (ext[0] == '.js') {
tagData = {type: 'script', url: url, ready: false};
self._loadTagResource(tagData, callback);
} else if (ext[0] == '.css') {
tagData = {type: 'link', url: url, ready: false};
self._loadTagResource(tagData, callback);
} else {
self._loadDeepResourceToCache(url, false, function (err, data) {
self._resourcesGrabbed.push(url);
callback(err, data);
});
}
};
this._loadTagResource = function (tagData, callback) {
self._embedQueue.push(tagData);
self._loadDeepResourceToCache(tagData.url, false, function (err, data) {
tagData.ready = true;
tagData.error = err;
callback(err, data);
});
};
this.loadAndEmbedScript = function (url, callback) {
var tagData = {type: 'script', url: url, callback: callback, error: null, ready: false};
self._embedQueue.push(tagData);
self._loadDeepResourceToCache(url, false, function (err) {
tagData.ready = true;
tagData.error = err;
self._processEmbedQueue();
});
};
this.loadAndEmbedCSS = function (url, callback) {
var tagData = {type: 'link', url: url, callback: callback, error: null, ready: false}
self._embedQueue.push(tagData);
self._loadDeepResourceToCache(url, false, function (err) {
tagData.ready = true;
tagData.error = err;
self._processEmbedQueue();
});
};
/**
Insert a script tag into the current document as it is being constructed.
The id & callback parameters are optional.
*/
this.scriptTag = function (url, type, id, callback, query) {
var head = document.getElementsByTagName('head')[0];
var script = document.createElement('script');
if (!$loader._ie || parseInt($loader._ieVersion) > 8) {
if (callback) {
script.onload = function () {
callback(null, url);
};
}
} else {
if (callback) {
script.onreadystatechange = function () {
if (this.readyState == 'complete' || this.readyState == 'loaded') {
script.onreadystatechange = null;
callback(null, url);
}
};
}
}
if (id) {
script.id = id;
}
script.type = type;
if (query) {
script.src = url + '?' + query;
} else {
script.src = NOMBO_CACHE_MANAGER.setURLCacheVersion(url);
}
head.appendChild(script);
};
/**
Insert a link tag into the current document as it is being constructed.
The id & callback parameters are optional.
*/
this.linkTag = function (url, type, rel, query, id) {
var head = document.getElementsByTagName('head')[0];
var curScripts = document.getElementsByTagName('script');
var firstScript = null;
var firstIndex = 0;
if (curScripts) {
var len = curScripts.length;
while(firstIndex < len && curScripts[firstIndex].parentNode != head) {
firstIndex++;
}
if (firstIndex < len) {
firstScript = curScripts[firstIndex];
}
}
var link = document.createElement('link');
if (id) {
link.id = id;
}
link.rel = rel;
link.type = type;
if (query) {
link.href = url + '?' + query;
} else {
link.href = NOMBO_CACHE_MANAGER.setURLCacheVersion(url);
}
if (firstScript) {
head.insertBefore(link, firstScript);
} else {
var curLinks = document.getElementsByTagName('link');
var lastLink = null;
var lastIndex = curLinks.length - 1;
if (curLinks) {
while(lastIndex >= 0 && curLinks[lastIndex].parentNode != head) {
lastIndex--;
}
if (lastIndex >= 0) {
lastLink = curLinks[lastIndex];
}
}
if (lastLink) {
if (lastLink.nextSibling) {
head.insertBefore(link, lastLink.nextSibling);
} else {
head.appendChild(link);
}
} else {
head.appendChild(link);
}
}
};
this.styleTag = function (code, type, id) {
var head = document.getElementsByTagName('head')[0];
var curScripts = document.getElementsByTagName('script');
var firstScript = null;
var firstIndex = 0;
if (curScripts) {
var len = curScripts.length;
while(firstIndex < len && curScripts[firstIndex].parentNode != head) {
firstIndex++;
}
if (firstIndex < len) {
firstScript = curScripts[firstIndex];
}
}
var style = document.createElement('style');
if (id) {
style.id = id;
}
style.type = type;
style.innerHTML = code;
if (firstScript) {
head.insertBefore(style, firstScript);
} else {
var curStyles = document.getElementsByTagName('style');
var lastStyle = null;
var lastIndex = curStyles.length - 1;
if (curStyles) {
while(lastIndex >= 0 && curStyles[lastIndex].parentNode != head) {
lastIndex--;
}
if (lastIndex >= 0) {
lastStyle = curStyles[lastIndex];
}
}
if (lastStyle) {
if (lastStyle.nextSibling) {
head.insertBefore(style, lastStyle.nextSibling);
} else {
head.appendChild(style);
}
} else {
head.appendChild(style);
}
}
};
this.isGrabbing = function () {
return self._resourcesGrabbed.length < self._resources.length;
};
this._progressTracker = {};
this._updateProgressStatus = function (url, loaded) {
if (self._options.resourceSizeMap.hasOwnProperty(url)) {
self._progressTracker[url] = loaded;
var i;
var progressMap = self._progressTracker;
var status = {loaded: 0, total: self._resourceSizeTotal};
for (i in progressMap) {
status.loaded += progressMap[i];
}
$loader.emit('progress', status);
}
};
this._versionDeepCSSURLs = function (content) {
content = content.replace(this._cssURLRegex, function (match, first, second) {
var newURL = NOMBO_CACHE_MANAGER.setURLCacheVersion(second);
return first + 'url("' + newURL + '")';
});
return content;
};
this._loadDeepResourceToCache = function (url, fresh, callback, rootURL) {
url = url.replace(/[?].*/, '');
if (!self._resourcesLoadedMap[url]) {
if (!rootURL || url == rootURL) {
rootURL = url;
self._resources.push(url);
self._deepResources[rootURL] = [];
self._deepResources[rootURL].push(url);
self._deepResourcesLoaded[rootURL] = [];
}
if (/[.](png|apng|jpg|jpeg|gif)$/.test(url)) {
// images
var img = new Image();
img.onload = function () {
var resourceData = img;
self._resourcesLoadedMap[url] = true;
self._deepResourcesLoaded[rootURL].push(url);
if ($loader._booting) {
self._updateProgressStatus(url, self._options.resourceSizeMap[url]);
}
if (self._deepResourcesLoaded[rootURL].length >= self._deepResources[rootURL].length) {
self._resourcesLoaded.push(rootURL);
if (callback) {
callback(null, {url: rootURL, data: resourceData});
}
}
};
img.onerror = function () {
self._triggerFail(url);
if (callback) {
callback('Failed to load resource at url: ' + url);
}
};
var tempURL = self.url(url, fresh);
img.src = tempURL;
} else {
var tempURL = self.url(url, fresh);
var ajaxSettings = {
url: tempURL,
type: "GET",
success: function (data) {
self._updateProgressStatus(url, self._options.resourceSizeMap[url]);
var resourceData = data;
self._resourcesLoadedMap[url] = true;
self._deepResourcesLoaded[rootURL].push(url);
var urls, nonLoadedURLs;
if (/[.](css)$/.test(url)) {
resourceData = self._versionDeepCSSURLs(resourceData);
urls = self._parseDeepCSSURLs(resourceData, url);
nonLoadedURLs = [];
var i, curURL;
var len = urls.length;
for (i=0; i<len; i++) {
curURL = urls[i];