/*!
 * jQuery Scrollstop Plugin v1.1.0
 * https://github.com/ssorallen/jquery-scrollstop
 */
(function($) {
    // $.event.dispatch was undocumented and was deprecated in jQuery 1.7[1]. It
    // was replaced by $.event.handle in jQuery 1.9.
    //
    // Use the first of the available functions to support jQuery <1.8.
    //
    // [1] https://github.com/jquery/jquery-migrate/blob/master/src/event.js#L25
    var dispatch = $.event.dispatch || $.event.handle;

    var special = $.event.special,
        uid1 = 'D' + (+new Date()),
        uid2 = 'D' + (+new Date() + 1);

    special.scrollstart = {
        setup: function(data) {
            var _data = $.extend({
                latency: special.scrollstop.latency
            }, data);

            var timer,
                handler = function(evt) {
                    var _self = this,
                        _args = arguments;

                    if (timer) {
                        clearTimeout(timer);
                    } else {
                        evt.type = 'scrollstart';
                        dispatch.apply(_self, _args);
                    }

                    timer = setTimeout(function() {
                        timer = null;
                    }, _data.latency);
                };

            $(this).bind('scroll', handler).data(uid1, handler);
        },
        teardown: function() {
            $(this).unbind('scroll', $(this).data(uid1));
        }
    };

    special.scrollstop = {
        latency: 250,
        setup: function(data) {
            var _data = $.extend({
                latency: special.scrollstop.latency
            }, data);

            var timer,
                handler = function(evt) {
                    var _self = this,
                        _args = arguments;

                    if (timer) {
                        clearTimeout(timer);
                    }

                    timer = setTimeout(function() {
                        timer = null;
                        evt.type = 'scrollstop';
                        dispatch.apply(_self, _args);
                    }, _data.latency);
                };

            $(this).bind('scroll', handler).data(uid2, handler);
        },
        teardown: function() {
            $(this).unbind('scroll', $(this).data(uid2));
        }
    };

})(jQuery);