/*
* jQuery Asynchronous Plugin 1.0
*
* Copyright (c) 2008 Vincent Robert (genezys.net)
* Dual licensed under the MIT (MIT-LICENSE.txt)
* and GPL (GPL-LICENSE.txt) licenses.
*
*/
(function($) {

    // opts.delay : (default 10) delay between async call in ms
    // opts.bulk : (default 500) delay during which the loop can continue synchronously without yielding the CPU
    // opts.test : (default true) function to test in the while test part
    // opts.loop : (default empty) function to call in the while loop part
    // opts.end : (default empty) function to call at the end of the while loop
    $.whileAsync = function(opts) {
        var delay = Math.abs(opts.delay) || 10,
		bulk = isNaN(opts.bulk) ? 500 : Math.abs(opts.bulk),
		test = opts.test || function() { return true; },
		loop = opts.loop || function() { },
		end = opts.end || function() { };

        (function() {

            var t = false,
			begin = new Date();

            while (t = test()) {
                loop();
                if (bulk === 0 || (new Date() - begin) > bulk) {
                    break;
                }
            }
            if (t) {
                setTimeout(arguments.callee, delay);
            }
            else {
                end();
            }

        })();
    }

    // opts.delay : (default 10) delay between async call in ms
    // opts.bulk : (default 500) delay during which the loop can continue synchronously without yielding the CPU
    // opts.loop : (default empty) function to call in the each loop part, signature: function(index, value) this = value
    // opts.end : (default empty) function to call at the end of the each loop
    $.eachAsync = function(array, opts) {
        var i = 0,
		l = array.length,
		loop = opts.loop || function() { };

        $.whileAsync(
		$.extend(opts, {
		    test: function() { return i < l; },
		    loop: function() {
		        var val = array[i];
		        return loop.call(val, i++, val);
		    }
		})
	);
    }

    $.fn.eachAsync = function(opts) {
        $.eachAsync(this, opts);
        return this;
    }

})(jQuery)