event/js/event-ready-base.js

	event-ready-base.js revision d98d5e2bbc3fcf2015c549dd94c4c0371b3fdbe7
/**
 * Custom event engine, DOM event listener abstraction layer, synthetic DOM
 * events.
 * @module event
 */

(function() {

var GLOBAL_ENV = YUI.Env,
    C = YUI.config,
    D = C.doc,
    POLL_INTERVAL = C.pollInterval || 20;

    if (!GLOBAL_ENV._ready) {

        GLOBAL_ENV.windowLoaded = false;

        var _ready = function(e) {
            GLOBAL_ENV._ready();
        };

        GLOBAL_ENV._ready = function() {
            if (!GLOBAL_ENV.DOMReady) {
                GLOBAL_ENV.DOMReady=true;

                // Remove the DOMContentLoaded (FF/Opera)
                if (D.removeEventListener) {
                    D.removeEventListener("DOMContentLoaded", _ready, false);
                }
            }
        };

        // create custom event

        /////////////////////////////////////////////////////////////
        // DOMReady
        // based on work by: Dean Edwards/John Resig/Matthias Miller

        // Internet Explorer: use the readyState of a defered script.
        // This isolates what appears to be a safe moment to manipulate
        // the DOM prior to when the document's readyState suggests
        // it is safe to do so.
        if (navigator.userAgent.match(/MSIE/)) {

            GLOBAL_ENV._dri = setInterval(function() {
                try {
                    // throws an error if doc is not ready
                    document.documentElement.doScroll('left');
                    clearInterval(GLOBAL_ENV._dri);
                    GLOBAL_ENV._dri = null;
                    _ready();
                } catch (ex) {
                }
            }, POLL_INTERVAL);

        // FireFox and Opera: These browsers provide a event for this
        // moment.  The latest WebKit releases now support this event.
        } else {
            D.addEventListener("DOMContentLoaded", _ready, false);
        }

        /////////////////////////////////////////////////////////////
    }

})();