forked-synapse/webclient/js/ng-infinite-scroll-matrix.js

/* ng-infinite-scroll - v1.0.0 - 2013-02-23 
  Matrix: Modified to support scrolling UP to get infinite loading and to listen
  to scroll events on the PARENT element, not the window.
*/
var mod;

mod = angular.module('infinite-scroll', []);

mod.directive('infiniteScroll', [
  '$rootScope', '$window', '$timeout', function($rootScope, $window, $timeout) {
    return {
      link: function(scope, elem, attrs) {
        var checkWhenEnabled, handler, scrollDistance, scrollEnabled;
        $window = angular.element($window);
        scrollDistance = 0;
        if (attrs.infiniteScrollDistance != null) {
          scope.$watch(attrs.infiniteScrollDistance, function(value) {
            return scrollDistance = parseInt(value, 10);
          });
        }
        scrollEnabled = true;
        checkWhenEnabled = false;
        if (attrs.infiniteScrollDisabled != null) {
          scope.$watch(attrs.infiniteScrollDisabled, function(value) {
            scrollEnabled = !value;
            if (scrollEnabled && checkWhenEnabled) {
              checkWhenEnabled = false;
              return handler();
            }
          });
        }
        handler = function() {
          var elementTop, remaining, shouldScroll, windowTop;
          windowTop = 0;
          elementTop = elem.offset().top;
          shouldScroll = elementTop >= 0; // top of list is at the top of the window or further down the page
          if (shouldScroll && scrollEnabled) {
            if ($rootScope.$$phase) {
              return scope.$eval(attrs.infiniteScroll);
            } else {
              return scope.$apply(attrs.infiniteScroll);
            }
          } else if (shouldScroll) {
            return checkWhenEnabled = true;
          }
        };
        elem.parent().on('scroll', handler);
        scope.$on('$destroy', function() {
          return elem.parent().off('scroll', handler);
        });
        return $timeout((function() {
          if (attrs.infiniteScrollImmediateCheck) {
            if (scope.$eval(attrs.infiniteScrollImmediateCheck)) {
              return handler();
            }
          } else {
            return handler();
          }
        }), 0);
      }
    };
  }
]);