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author | Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi> | 2014-04-05 08:06:35 +0300 |
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committer | Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi> | 2014-04-06 21:33:58 +0300 |
commit | 0b76b6c9d4fca528700d4ac7226e6e97eb57f17c (patch) | |
tree | d8db5bd48e6b58fc2cc3d1a616f01192dd706e52 /web/lib | |
parent | 01df6ca4c0e2b039bf1a212cbe466c3931d23cf8 (diff) | |
download | aconf-0b76b6c9d4fca528700d4ac7226e6e97eb57f17c.tar.bz2 aconf-0b76b6c9d4fca528700d4ac7226e6e97eb57f17c.tar.xz |
web client: ensure DOM is fully loaded before starting the main script
Diffstat (limited to 'web/lib')
-rw-r--r-- | web/lib/domReady.js | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/web/lib/domReady.js b/web/lib/domReady.js new file mode 100644 index 0000000..2b54122 --- /dev/null +++ b/web/lib/domReady.js @@ -0,0 +1,129 @@ +/** + * @license RequireJS domReady 2.0.1 Copyright (c) 2010-2012, The Dojo Foundation All Rights Reserved. + * Available via the MIT or new BSD license. + * see: http://github.com/requirejs/domReady for details + */ +/*jslint */ +/*global require: false, define: false, requirejs: false, + window: false, clearInterval: false, document: false, + self: false, setInterval: false */ + + +define(function () { + 'use strict'; + + var isTop, testDiv, scrollIntervalId, + isBrowser = typeof window !== "undefined" && window.document, + isPageLoaded = !isBrowser, + doc = isBrowser ? document : null, + readyCalls = []; + + function runCallbacks(callbacks) { + var i; + for (i = 0; i < callbacks.length; i += 1) { + callbacks[i](doc); + } + } + + function callReady() { + var callbacks = readyCalls; + + if (isPageLoaded) { + //Call the DOM ready callbacks + if (callbacks.length) { + readyCalls = []; + runCallbacks(callbacks); + } + } + } + + /** + * Sets the page as loaded. + */ + function pageLoaded() { + if (!isPageLoaded) { + isPageLoaded = true; + if (scrollIntervalId) { + clearInterval(scrollIntervalId); + } + + callReady(); + } + } + + if (isBrowser) { + if (document.addEventListener) { + //Standards. Hooray! Assumption here that if standards based, + //it knows about DOMContentLoaded. + document.addEventListener("DOMContentLoaded", pageLoaded, false); + window.addEventListener("load", pageLoaded, false); + } else if (window.attachEvent) { + window.attachEvent("onload", pageLoaded); + + testDiv = document.createElement('div'); + try { + isTop = window.frameElement === null; + } catch (e) {} + + //DOMContentLoaded approximation that uses a doScroll, as found by + //Diego Perini: http://javascript.nwbox.com/IEContentLoaded/, + //but modified by other contributors, including jdalton + if (testDiv.doScroll && isTop && window.external) { + scrollIntervalId = setInterval(function () { + try { + testDiv.doScroll(); + pageLoaded(); + } catch (e) {} + }, 30); + } + } + + //Check if document already complete, and if so, just trigger page load + //listeners. Latest webkit browsers also use "interactive", and + //will fire the onDOMContentLoaded before "interactive" but not after + //entering "interactive" or "complete". More details: + //http://dev.w3.org/html5/spec/the-end.html#the-end + //http://stackoverflow.com/questions/3665561/document-readystate-of-interactive-vs-ondomcontentloaded + //Hmm, this is more complicated on further use, see "firing too early" + //bug: https://github.com/requirejs/domReady/issues/1 + //so removing the || document.readyState === "interactive" test. + //There is still a window.onload binding that should get fired if + //DOMContentLoaded is missed. + if (document.readyState === "complete") { + pageLoaded(); + } + } + + /** START OF PUBLIC API **/ + + /** + * Registers a callback for DOM ready. If DOM is already ready, the + * callback is called immediately. + * @param {Function} callback + */ + function domReady(callback) { + if (isPageLoaded) { + callback(doc); + } else { + readyCalls.push(callback); + } + return domReady; + } + + domReady.version = '2.0.1'; + + /** + * Loader Plugin API method + */ + domReady.load = function (name, req, onLoad, config) { + if (config.isBuild) { + onLoad(null); + } else { + domReady(onLoad); + } + }; + + /** END OF PUBLIC API **/ + + return domReady; +}); |