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+///#source 1 1 /src/1.0.0/load.js
+/*! head.load - v1.0.3 */
+/*
+ * HeadJS The only script in your <HEAD>
+ * Author Tero Piirainen (tipiirai)
+ * Maintainer Robert Hoffmann (itechnology)
+ * License MIT / http://bit.ly/mit-license
+ * WebSite http://headjs.com
+ */
+(function (win, undefined) {
+ "use strict";
+
+ //#region variables
+ var doc = win.document,
+ domWaiters = [],
+ handlers = {}, // user functions waiting for events
+ assets = {}, // loadable items in various states
+ isAsync = "async" in doc.createElement("script") || "MozAppearance" in doc.documentElement.style || win.opera,
+ isDomReady,
+
+ /*** public API ***/
+ headVar = win.head_conf && win.head_conf.head || "head",
+ api = win[headVar] = (win[headVar] || function () { api.ready.apply(null, arguments); }),
+
+ // states
+ PRELOADING = 1,
+ PRELOADED = 2,
+ LOADING = 3,
+ LOADED = 4;
+ //#endregion
+
+ //#region PRIVATE functions
+
+ //#region Helper functions
+ function noop() {
+ // does nothing
+ }
+
+ function each(arr, callback) {
+ if (!arr) {
+ return;
+ }
+
+ // arguments special type
+ if (typeof arr === "object") {
+ arr = [].slice.call(arr);
+ }
+
+ // do the job
+ for (var i = 0, l = arr.length; i < l; i++) {
+ callback.call(arr, arr[i], i);
+ }
+ }
+
+ /* A must read: http://bonsaiden.github.com/JavaScript-Garden
+ ************************************************************/
+ function is(type, obj) {
+ var clas = Object.prototype.toString.call(obj).slice(8, -1);
+ return obj !== undefined && obj !== null && clas === type;
+ }
+
+ function isFunction(item) {
+ return is("Function", item);
+ }
+
+ function isArray(item) {
+ return is("Array", item);
+ }
+
+ function toLabel(url) {
+ ///<summary>Converts a url to a file label</summary>
+ var items = url.split("/"),
+ name = items[items.length - 1],
+ i = name.indexOf("?");
+
+ return i !== -1 ? name.substring(0, i) : name;
+ }
+
+ // INFO: this look like a "im triggering callbacks all over the place, but only wanna run it one time function" ..should try to make everything work without it if possible
+ // INFO: Even better. Look into promises/defered's like jQuery is doing
+ function one(callback) {
+ ///<summary>Execute a callback only once</summary>
+ callback = callback || noop;
+
+ if (callback._done) {
+ return;
+ }
+
+ callback();
+ callback._done = 1;
+ }
+ //#endregion
+
+ function conditional(test, success, failure, callback) {
+ ///<summary>
+ /// INFO: use cases:
+ /// head.test(condition, null , "file.NOk" , callback);
+ /// head.test(condition, "fileOk.js", null , callback);
+ /// head.test(condition, "fileOk.js", "file.NOk" , callback);
+ /// head.test(condition, "fileOk.js", ["file.NOk", "file.NOk"], callback);
+ /// head.test({
+ /// test : condition,
+ /// success : [{ label1: "file1Ok.js" }, { label2: "file2Ok.js" }],
+ /// failure : [{ label1: "file1NOk.js" }, { label2: "file2NOk.js" }],
+ /// callback: callback
+ /// );
+ /// head.test({
+ /// test : condition,
+ /// success : ["file1Ok.js" , "file2Ok.js"],
+ /// failure : ["file1NOk.js", "file2NOk.js"],
+ /// callback: callback
+ /// );
+ ///</summary>
+ var obj = (typeof test === "object") ? test : {
+ test: test,
+ success: !!success ? isArray(success) ? success : [success] : false,
+ failure: !!failure ? isArray(failure) ? failure : [failure] : false,
+ callback: callback || noop
+ };
+
+ // Test Passed ?
+ var passed = !!obj.test;
+
+ // Do we have a success case
+ if (passed && !!obj.success) {
+ obj.success.push(obj.callback);
+ api.load.apply(null, obj.success);
+ }
+ // Do we have a fail case
+ else if (!passed && !!obj.failure) {
+ obj.failure.push(obj.callback);
+ api.load.apply(null, obj.failure);
+ }
+ else {
+ callback();
+ }
+
+ return api;
+ }
+
+ function getAsset(item) {
+ ///<summary>
+ /// Assets are in the form of
+ /// {
+ /// name : label,
+ /// url : url,
+ /// state: state
+ /// }
+ ///</summary>
+ var asset = {};
+
+ if (typeof item === "object") {
+ for (var label in item) {
+ if (!!item[label]) {
+ asset = {
+ name: label,
+ url : item[label]
+ };
+ }
+ }
+ }
+ else {
+ asset = {
+ name: toLabel(item),
+ url : item
+ };
+ }
+
+ // is the item already existant
+ var existing = assets[asset.name];
+ if (existing && existing.url === asset.url) {
+ return existing;
+ }
+
+ assets[asset.name] = asset;
+ return asset;
+ }
+
+ function allLoaded(items) {
+ items = items || assets;
+
+ for (var name in items) {
+ if (items.hasOwnProperty(name) && items[name].state !== LOADED) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ function onPreload(asset) {
+ asset.state = PRELOADED;
+
+ each(asset.onpreload, function (afterPreload) {
+ afterPreload.call();
+ });
+ }
+
+ function preLoad(asset, callback) {
+ if (asset.state === undefined) {
+
+ asset.state = PRELOADING;
+ asset.onpreload = [];
+
+ loadAsset({ url: asset.url, type: "cache" }, function () {
+ onPreload(asset);
+ });
+ }
+ }
+
+ function apiLoadHack() {
+ /// <summary>preload with text/cache hack
+ ///
+ /// head.load("http://domain.com/file.js","http://domain.com/file.js", callBack)
+ /// head.load(["http://domain.com/file.js","http://domain.com/file.js"], callBack)
+ /// head.load({ label1: "http://domain.com/file.js" }, { label2: "http://domain.com/file.js" }, callBack)
+ /// head.load([{ label1: "http://domain.com/file.js" }, { label2: "http://domain.com/file.js" }], callBack)
+ /// </summary>
+ var args = arguments,
+ callback = args[args.length - 1],
+ rest = [].slice.call(args, 1),
+ next = rest[0];
+
+ if (!isFunction(callback)) {
+ callback = null;
+ }
+
+ // if array, repush as args
+ if (isArray(args[0])) {
+ args[0].push(callback);
+ api.load.apply(null, args[0]);
+
+ return api;
+ }
+
+ // multiple arguments
+ if (!!next) {
+ /* Preload with text/cache hack (not good!)
+ * http://blog.getify.com/on-script-loaders/
+ * http://www.nczonline.net/blog/2010/12/21/thoughts-on-script-loaders/
+ * If caching is not configured correctly on the server, then items could load twice !
+ *************************************************************************************/
+ each(rest, function (item) {
+ // item is not a callback or empty string
+ if (!isFunction(item) && !!item) {
+ preLoad(getAsset(item));
+ }
+ });
+
+ // execute
+ load(getAsset(args[0]), isFunction(next) ? next : function () {
+ api.load.apply(null, rest);
+ });
+ }
+ else {
+ // single item
+ load(getAsset(args[0]));
+ }
+
+ return api;
+ }
+
+ function apiLoadAsync() {
+ ///<summary>
+ /// simply load and let browser take care of ordering
+ ///
+ /// head.load("http://domain.com/file.js","http://domain.com/file.js", callBack)
+ /// head.load(["http://domain.com/file.js","http://domain.com/file.js"], callBack)
+ /// head.load({ label1: "http://domain.com/file.js" }, { label2: "http://domain.com/file.js" }, callBack)
+ /// head.load([{ label1: "http://domain.com/file.js" }, { label2: "http://domain.com/file.js" }], callBack)
+ ///</summary>
+ var args = arguments,
+ callback = args[args.length - 1],
+ items = {};
+
+ if (!isFunction(callback)) {
+ callback = null;
+ }
+
+ // if array, repush as args
+ if (isArray(args[0])) {
+ args[0].push(callback);
+ api.load.apply(null, args[0]);
+
+ return api;
+ }
+
+ // JRH 262#issuecomment-26288601
+ // First populate the items array.
+ // When allLoaded is called, all items will be populated.
+ // Issue when lazy loaded, the callback can execute early.
+ each(args, function (item, i) {
+ if (item !== callback) {
+ item = getAsset(item);
+ items[item.name] = item;
+ }
+ });
+
+ each(args, function (item, i) {
+ if (item !== callback) {
+ item = getAsset(item);
+
+ load(item, function () {
+ if (allLoaded(items)) {
+ one(callback);
+ }
+ });
+ }
+ });
+
+ return api;
+ }
+
+ function load(asset, callback) {
+ ///<summary>Used with normal loading logic</summary>
+ callback = callback || noop;
+
+ if (asset.state === LOADED) {
+ callback();
+ return;
+ }
+
+ // INFO: why would we trigger a ready event when its not really loaded yet ?
+ if (asset.state === LOADING) {
+ api.ready(asset.name, callback);
+ return;
+ }
+
+ if (asset.state === PRELOADING) {
+ asset.onpreload.push(function () {
+ load(asset, callback);
+ });
+ return;
+ }
+
+ asset.state = LOADING;
+
+ loadAsset(asset, function () {
+ asset.state = LOADED;
+
+ callback();
+
+ // handlers for this asset
+ each(handlers[asset.name], function (fn) {
+ one(fn);
+ });
+
+ // dom is ready & no assets are queued for loading
+ // INFO: shouldn't we be doing the same test above ?
+ if (isDomReady && allLoaded()) {
+ each(handlers.ALL, function (fn) {
+ one(fn);
+ });
+ }
+ });
+ }
+
+ function getExtension(url) {
+ url = url || "";
+
+ var items = url.split("?")[0].split(".");
+ return items[items.length-1].toLowerCase();
+ }
+
+ /* Parts inspired from: https://github.com/cujojs/curl
+ ******************************************************/
+ function loadAsset(asset, callback) {
+ callback = callback || noop;
+
+ function error(event) {
+ event = event || win.event;
+
+ // release event listeners
+ ele.onload = ele.onreadystatechange = ele.onerror = null;
+
+ // do callback
+ callback();
+
+ // need some more detailed error handling here
+ }
+
+ function process(event) {
+ event = event || win.event;
+
+ // IE 7/8 (2 events on 1st load)
+ // 1) event.type = readystatechange, s.readyState = loading
+ // 2) event.type = readystatechange, s.readyState = loaded
+
+ // IE 7/8 (1 event on reload)
+ // 1) event.type = readystatechange, s.readyState = complete
+
+ // event.type === 'readystatechange' && /loaded|complete/.test(s.readyState)
+
+ // IE 9 (3 events on 1st load)
+ // 1) event.type = readystatechange, s.readyState = loading
+ // 2) event.type = readystatechange, s.readyState = loaded
+ // 3) event.type = load , s.readyState = loaded
+
+ // IE 9 (2 events on reload)
+ // 1) event.type = readystatechange, s.readyState = complete
+ // 2) event.type = load , s.readyState = complete
+
+ // event.type === 'load' && /loaded|complete/.test(s.readyState)
+ // event.type === 'readystatechange' && /loaded|complete/.test(s.readyState)
+
+ // IE 10 (3 events on 1st load)
+ // 1) event.type = readystatechange, s.readyState = loading
+ // 2) event.type = load , s.readyState = complete
+ // 3) event.type = readystatechange, s.readyState = loaded
+
+ // IE 10 (3 events on reload)
+ // 1) event.type = readystatechange, s.readyState = loaded
+ // 2) event.type = load , s.readyState = complete
+ // 3) event.type = readystatechange, s.readyState = complete
+
+ // event.type === 'load' && /loaded|complete/.test(s.readyState)
+ // event.type === 'readystatechange' && /complete/.test(s.readyState)
+
+ // Other Browsers (1 event on 1st load)
+ // 1) event.type = load, s.readyState = undefined
+
+ // Other Browsers (1 event on reload)
+ // 1) event.type = load, s.readyState = undefined
+
+ // event.type == 'load' && s.readyState = undefined
+
+ // !doc.documentMode is for IE6/7, IE8+ have documentMode
+ if (event.type === "load" || (/loaded|complete/.test(ele.readyState) && (!doc.documentMode || doc.documentMode < 9))) {
+ // remove timeouts
+ win.clearTimeout(asset.errorTimeout);
+ win.clearTimeout(asset.cssTimeout);
+
+ // release event listeners
+ ele.onload = ele.onreadystatechange = ele.onerror = null;
+
+ // do callback
+ callback();
+ }
+ }
+
+ function isCssLoaded() {
+ // should we test again ? 20 retries = 5secs ..after that, the callback will be triggered by the error handler at 7secs
+ if (asset.state !== LOADED && asset.cssRetries <= 20) {
+
+ // loop through stylesheets
+ for (var i = 0, l = doc.styleSheets.length; i < l; i++) {
+ // do we have a match ?
+ // we need to tests agains ele.href and not asset.url, because a local file will be assigned the full http path on a link element
+ if (doc.styleSheets[i].href === ele.href) {
+ process({ "type": "load" });
+ return;
+ }
+ }
+
+ // increment & try again
+ asset.cssRetries++;
+ asset.cssTimeout = win.setTimeout(isCssLoaded, 250);
+ }
+ }
+
+ var ele;
+ var ext = getExtension(asset.url);
+
+ if (ext === "css") {
+ ele = doc.createElement("link");
+ ele.type = "text/" + (asset.type || "css");
+ ele.rel = "stylesheet";
+ ele.href = asset.url;
+
+ /* onload supported for CSS on unsupported browsers
+ * Safari windows 5.1.7, FF < 10
+ */
+
+ // Set counter to zero
+ asset.cssRetries = 0;
+ asset.cssTimeout = win.setTimeout(isCssLoaded, 500);
+ }
+ else {
+ ele = doc.createElement("script");
+ ele.type = "text/" + (asset.type || "javascript");
+ ele.src = asset.url;
+ }
+
+ ele.onload = ele.onreadystatechange = process;
+ ele.onerror = error;
+
+ /* Good read, but doesn't give much hope !
+ * http://blog.getify.com/on-script-loaders/
+ * http://www.nczonline.net/blog/2010/12/21/thoughts-on-script-loaders/
+ * https://hacks.mozilla.org/2009/06/defer/
+ */
+
+ // ASYNC: load in parallel and execute as soon as possible
+ ele.async = false;
+ // DEFER: load in parallel but maintain execution order
+ ele.defer = false;
+
+ // timout for asset loading
+ asset.errorTimeout = win.setTimeout(function () {
+ error({ type: "timeout" });
+ }, 7e3);
+
+ // use insertBefore to keep IE from throwing Operation Aborted (thx Bryan Forbes!)
+ var head = doc.head || doc.getElementsByTagName("head")[0];
+
+ // but insert at end of head, because otherwise if it is a stylesheet, it will not override values
+ head.insertBefore(ele, head.lastChild);
+ }
+
+ /* Parts inspired from: https://github.com/jrburke/requirejs
+ ************************************************************/
+ function init() {
+ var items = doc.getElementsByTagName("script");
+
+ // look for a script with a data-head-init attribute
+ for (var i = 0, l = items.length; i < l; i++) {
+ var dataMain = items[i].getAttribute("data-headjs-load");
+ if (!!dataMain) {
+ api.load(dataMain);
+ return;
+ }
+ }
+ }
+
+ function ready(key, callback) {
+ ///<summary>
+ /// INFO: use cases:
+ /// head.ready(callBack);
+ /// head.ready(document , callBack);
+ /// head.ready("file.js", callBack);
+ /// head.ready("label" , callBack);
+ /// head.ready(["label1", "label2"], callback);
+ ///</summary>
+
+ // DOM ready check: head.ready(document, function() { });
+ if (key === doc) {
+ if (isDomReady) {
+ one(callback);
+ }
+ else {
+ domWaiters.push(callback);
+ }
+
+ return api;
+ }
+
+ // shift arguments
+ if (isFunction(key)) {
+ callback = key;
+ key = "ALL"; // holds all callbacks that where added without labels: ready(callBack)
+ }
+
+ // queue all items from key and return. The callback will be executed if all items from key are already loaded.
+ if (isArray(key)) {
+ var items = {};
+
+ each(key, function (item) {
+ items[item] = assets[item];
+
+ api.ready(item, function() {
+ if (allLoaded(items)) {
+ one(callback);
+ }
+ });
+ });
+
+ return api;
+ }
+
+ // make sure arguments are sane
+ if (typeof key !== "string" || !isFunction(callback)) {
+ return api;
+ }
+
+ // this can also be called when we trigger events based on filenames & labels
+ var asset = assets[key];
+
+ // item already loaded --> execute and return
+ if (asset && asset.state === LOADED || key === "ALL" && allLoaded() && isDomReady) {
+ one(callback);
+ return api;
+ }
+
+ var arr = handlers[key];
+ if (!arr) {
+ arr = handlers[key] = [callback];
+ }
+ else {
+ arr.push(callback);
+ }
+
+ return api;
+ }
+
+ /* Mix of stuff from jQuery & IEContentLoaded
+ * http://dev.w3.org/html5/spec/the-end.html#the-end
+ ***************************************************/
+ function domReady() {
+ // Make sure body exists, at least, in case IE gets a little overzealous (jQuery ticket #5443).
+ if (!doc.body) {
+ // let's not get nasty by setting a timeout too small.. (loop mania guaranteed if assets are queued)
+ win.clearTimeout(api.readyTimeout);
+ api.readyTimeout = win.setTimeout(domReady, 50);
+ return;
+ }
+
+ if (!isDomReady) {
+ isDomReady = true;
+
+ init();
+ each(domWaiters, function (fn) {
+ one(fn);
+ });
+ }
+ }
+
+ function domContentLoaded() {
+ // W3C
+ if (doc.addEventListener) {
+ doc.removeEventListener("DOMContentLoaded", domContentLoaded, false);
+ domReady();
+ }
+
+ // IE
+ else if (doc.readyState === "complete") {
+ // we're here because readyState === "complete" in oldIE
+ // which is good enough for us to call the dom ready!
+ doc.detachEvent("onreadystatechange", domContentLoaded);
+ domReady();
+ }
+ }
+
+ // Catch cases where ready() is called after the browser event has already occurred.
+ // we once tried to use readyState "interactive" here, but it caused issues like the one
+ // discovered by ChrisS here: http://bugs.jquery.com/ticket/12282#comment:15
+ if (doc.readyState === "complete") {
+ domReady();
+ }
+
+ // W3C
+ else if (doc.addEventListener) {
+ doc.addEventListener("DOMContentLoaded", domContentLoaded, false);
+
+ // A fallback to window.onload, that will always work
+ win.addEventListener("load", domReady, false);
+ }
+
+ // IE
+ else {
+ // Ensure firing before onload, maybe late but safe also for iframes
+ doc.attachEvent("onreadystatechange", domContentLoaded);
+
+ // A fallback to window.onload, that will always work
+ win.attachEvent("onload", domReady);
+
+ // If IE and not a frame
+ // continually check to see if the document is ready
+ var top = false;
+
+ try {
+ top = !win.frameElement && doc.documentElement;
+ } catch (e) { }
+
+ if (top && top.doScroll) {
+ (function doScrollCheck() {
+ if (!isDomReady) {
+ try {
+ // Use the trick by Diego Perini
+ // http://javascript.nwbox.com/IEContentLoaded/
+ top.doScroll("left");
+ } catch (error) {
+ // let's not get nasty by setting a timeout too small.. (loop mania guaranteed if assets are queued)
+ win.clearTimeout(api.readyTimeout);
+ api.readyTimeout = win.setTimeout(doScrollCheck, 50);
+ return;
+ }
+
+ // and execute any waiting functions
+ domReady();
+ }
+ }());
+ }
+ }
+ //#endregion
+
+ //#region Public Exports
+ // INFO: determine which method to use for loading
+ api.load = api.js = isAsync ? apiLoadAsync : apiLoadHack;
+ api.test = conditional;
+ api.ready = ready;
+ //#endregion
+
+ //#region INIT
+ // perform this when DOM is ready
+ api.ready(doc, function () {
+ if (allLoaded()) {
+ each(handlers.ALL, function (callback) {
+ one(callback);
+ });
+ }
+
+ if (api.feature) {
+ api.feature("domloaded", true);
+ }
+ });
+ //#endregion
+}(window));
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