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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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