AngularJS: Infinite Scrolling reverse!

http://jsfiddle.net/mNFmf/4/

by totoe

HTML

<script src="http://code.angularjs.org/1.1.1/angular.js"></script>
<div id="fixed" when-scrolled="loadMore()">
  <ul>
    <li ng-repeat="i in items">{{i.id}}</li>
  </ul>  
</div>

CSS

li {
  height: 120px;
  border-bottom: 1px solid gray;
}

#fixed {
    height: 400px;
    overflow: auto;
}

JavaScript

function Main($scope) {
    $scope.items = [];
    
    var counter = 0;
    $scope.loadMore = function() {
        for (var i = 0; i < 5; i++) {
            $scope.items.unshift({id: counter});
            counter += 10;
        }
    };
    
    $scope.loadMore();
}

angular.module('scroll', []).directive('whenScrolled', ['$timeout', function($timeout) {
    return function(scope, elm, attr) {
        var raw = elm[0];
        
        $timeout(function() {
            raw.scrollTop = raw.scrollHeight;          
        });         
        
        elm.bind('scroll', function() {
            if (raw.scrollTop <= 100) { // load more items before you hit the top
                var sh = raw.scrollHeight
                scope.$apply(attr.whenScrolled);
                raw.scrollTop = raw.scrollHeight - sh;
            }
        });
    };
}]);