diffux/diffux

define([
    "../core",
    "../core/init",
    "../deferred"
], function( jQuery ) {

// The deferred used on DOM ready
var readyList;

jQuery.fn.ready = function( fn ) {
    // Add the callback
    jQuery.ready.promise().done( fn );

    return this;
};

jQuery.extend({
    // Is the DOM ready to be used? Set to true once it occurs.
    isReady: false,

    // A counter to track how many items to wait for before
    // the ready event fires. See #6781
    readyWait: 1,

    // Hold (or release) the ready event
    holdReady: function( hold ) {
        if ( hold ) {
            jQuery.readyWait++;
        } else {
            jQuery.ready( true );
        }
    },

    // Handle when the DOM is ready
    ready: function( wait ) {

        // Abort if there are pending holds or we're already ready
        if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
            return;
        }

        // Remember that the DOM is ready
        jQuery.isReady = true;

        // If a normal DOM Ready event fired, decrement, and wait if need be
        if ( wait !== true && --jQuery.readyWait > 0 ) {
            return;
        }

        // If there are functions bound, to execute
        readyList.resolveWith( document, [ jQuery ] );

        // Trigger any bound ready events
        if ( jQuery.fn.triggerHandler ) {
            jQuery( document ).triggerHandler( "ready" );
            jQuery( document ).off( "ready" );
        }
    }
});

/**
 * The ready event handler and self cleanup method
 */
function completed() {
    document.removeEventListener( "DOMContentLoaded", completed, false );
    window.removeEventListener( "load", completed, false );
    jQuery.ready();
}

jQuery.ready.promise = function( obj ) {
    if ( !readyList ) {

        readyList = jQuery.Deferred();

        // Catch cases where $(document).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 ( document.readyState === "complete" ) {
            // Handle it asynchronously to allow scripts the opportunity to delay ready
            setTimeout( jQuery.ready );

        } else {

            // Use the handy event callback
            document.addEventListener( "DOMContentLoaded", completed, false );

            // A fallback to window.onload, that will always work
            window.addEventListener( "load", completed, false );
        }
    }
    return readyList.promise( obj );
};

// Kick off the DOM ready check even if the user does not
jQuery.ready.promise();

});