/*
 GNU Affero General Public License version 3 {@link http://www.gnu.org/licenses/agpl-3.0.html}
*/
(function (b) {
  if (b.ScrollTo) window.console.warn("$.ScrollTo has already been defined...");
 
  else {
    b.ScrollTo = {
      config: {
        duration: 400,
        easing: "swing",
        callback: undefined,
        durationMode: "each"
      },
      configure: function (c) {
        b.extend(b.ScrollTo.config, c || {});
        return this
      },
      scroll: function (c, d) {
        var f = b.ScrollTo,
            a = c.pop(),
            e = a.$container,
            g = a.$target;
        a = b("<span/>").css({
          position: "absolute",
          top: "0px",
          left: "0px"
        });
        var h = e.css("position");
        e.css("position", "relative");
        a.appendTo(e);
        var i = a.offset().top;
        g = g.offset().top - i;
        a.remove();
        e.css("position", h);
        e.animate({
          scrollTop: g + "px"
        }, d.duration, d.easing, function (j) {
          if (c.length === 0) typeof d.callback === "function" && d.callback.apply(this, [j]);
          else f.scroll(c, d);
          return true
        });
        return true
      },
      fn: function (c) {
        var d = b.ScrollTo,
            f = b(this);
        if (f.length === 0) return this;
        var a = f.parent(),
            e = [];
        for (config = b.extend({}, d.config, c); a.length === 1 && !a.is("body") && a.get(0) !== document;) {
          c = a.get(0);
          if (a.css("overflow-y") !== "visible" && c.scrollHeight !== c.clientHeight) {
            e.push({
              $container: a,
              $target: f
            });
            f = a
          }
          a = a.parent()
        }
        e.push({
          $container: b(b.browser.msie ? "html" : "body"),
          $target: f
        });
        if (config.durationMode === "all") config.duration /= e.length;
        d.scroll(e, config);
        return this
      },
      construct: function (c) {
        var d = b.ScrollTo;
        b.fn.ScrollTo = d.fn;
        d.config = b.extend(d.config, c);
        return this
      }
    };
    b.ScrollTo.construct()
  }
})(jQuery);