lucene/solr/webapp/web/js/lib/order.js

190 lines
7.6 KiB
JavaScript

/**
* @license RequireJS order 1.0.5 Copyright (c) 2010-2011, The Dojo Foundation All Rights Reserved.
* Available via the MIT or new BSD license.
* see: http://github.com/jrburke/requirejs for details
*/
/*jslint nomen: false, plusplus: false, strict: false */
/*global require: false, define: false, window: false, document: false,
setTimeout: false */
//Specify that requirejs optimizer should wrap this code in a closure that
//maps the namespaced requirejs API to non-namespaced local variables.
/*requirejs namespace: true */
(function () {
//Sadly necessary browser inference due to differences in the way
//that browsers load and execute dynamically inserted javascript
//and whether the script/cache method works when ordered execution is
//desired. Currently, Gecko and Opera do not load/fire onload for scripts with
//type="script/cache" but they execute injected scripts in order
//unless the 'async' flag is present.
//However, this is all changing in latest browsers implementing HTML5
//spec. With compliant browsers .async true by default, and
//if false, then it will execute in order. Favor that test first for forward
//compatibility.
var testScript = typeof document !== "undefined" &&
typeof window !== "undefined" &&
document.createElement("script"),
supportsInOrderExecution = testScript && (testScript.async ||
((window.opera &&
Object.prototype.toString.call(window.opera) === "[object Opera]") ||
//If Firefox 2 does not have to be supported, then
//a better check may be:
//('mozIsLocallyAvailable' in window.navigator)
("MozAppearance" in document.documentElement.style))),
//This test is true for IE browsers, which will load scripts but only
//execute them once the script is added to the DOM.
supportsLoadSeparateFromExecute = testScript &&
testScript.readyState === 'uninitialized',
readyRegExp = /^(complete|loaded)$/,
cacheWaiting = [],
cached = {},
scriptNodes = {},
scriptWaiting = [];
//Done with the test script.
testScript = null;
//Callback used by the type="script/cache" callback that indicates a script
//has finished downloading.
function scriptCacheCallback(evt) {
var node = evt.currentTarget || evt.srcElement, i,
moduleName, resource;
if (evt.type === "load" || readyRegExp.test(node.readyState)) {
//Pull out the name of the module and the context.
moduleName = node.getAttribute("data-requiremodule");
//Mark this cache request as loaded
cached[moduleName] = true;
//Find out how many ordered modules have loaded
for (i = 0; (resource = cacheWaiting[i]); i++) {
if (cached[resource.name]) {
resource.req([resource.name], resource.onLoad);
} else {
//Something in the ordered list is not loaded,
//so wait.
break;
}
}
//If just loaded some items, remove them from cacheWaiting.
if (i > 0) {
cacheWaiting.splice(0, i);
}
//Remove this script tag from the DOM
//Use a setTimeout for cleanup because some older IE versions vomit
//if removing a script node while it is being evaluated.
setTimeout(function () {
node.parentNode.removeChild(node);
}, 15);
}
}
/**
* Used for the IE case, where fetching is done by creating script element
* but not attaching it to the DOM. This function will be called when that
* happens so it can be determined when the node can be attached to the
* DOM to trigger its execution.
*/
function onFetchOnly(node) {
var i, loadedNode, resourceName;
//Mark this script as loaded.
node.setAttribute('data-orderloaded', 'loaded');
//Cycle through waiting scripts. If the matching node for them
//is loaded, and is in the right order, add it to the DOM
//to execute the script.
for (i = 0; (resourceName = scriptWaiting[i]); i++) {
loadedNode = scriptNodes[resourceName];
if (loadedNode &&
loadedNode.getAttribute('data-orderloaded') === 'loaded') {
delete scriptNodes[resourceName];
require.addScriptToDom(loadedNode);
} else {
break;
}
}
//If just loaded some items, remove them from waiting.
if (i > 0) {
scriptWaiting.splice(0, i);
}
}
define({
version: '1.0.5',
load: function (name, req, onLoad, config) {
var hasToUrl = !!req.nameToUrl,
url, node, context;
//If no nameToUrl, then probably a build with a loader that
//does not support it, and all modules are inlined.
if (!hasToUrl) {
req([name], onLoad);
return;
}
url = req.nameToUrl(name, null);
//Make sure the async attribute is not set for any pathway involving
//this script.
require.s.skipAsync[url] = true;
if (supportsInOrderExecution || config.isBuild) {
//Just a normal script tag append, but without async attribute
//on the script.
req([name], onLoad);
} else if (supportsLoadSeparateFromExecute) {
//Just fetch the URL, but do not execute it yet. The
//non-standards IE case. Really not so nice because it is
//assuming and touching requrejs internals. OK though since
//ordered execution should go away after a long while.
context = require.s.contexts._;
if (!context.urlFetched[url] && !context.loaded[name]) {
//Indicate the script is being fetched.
context.urlFetched[url] = true;
//Stuff from require.load
require.resourcesReady(false);
context.scriptCount += 1;
//Fetch the script now, remember it.
node = require.attach(url, context, name, null, null, onFetchOnly);
scriptNodes[name] = node;
scriptWaiting.push(name);
}
//Do a normal require for it, once it loads, use it as return
//value.
req([name], onLoad);
} else {
//Credit to LABjs author Kyle Simpson for finding that scripts
//with type="script/cache" allow scripts to be downloaded into
//browser cache but not executed. Use that
//so that subsequent addition of a real type="text/javascript"
//tag will cause the scripts to be executed immediately in the
//correct order.
if (req.specified(name)) {
req([name], onLoad);
} else {
cacheWaiting.push({
name: name,
req: req,
onLoad: onLoad
});
require.attach(url, null, name, scriptCacheCallback, "script/cache");
}
}
}
});
}());