$.fn.easeScroll = function (options) {
  !(function () {
    function e() {
      var e = !1;
      e && c('keydown', r), v.keyboardSupport && !e && u('keydown', r);
    }

    function t() {
      if (document.body) {
        var t = document.body,
          o = document.documentElement,
          n = window.innerHeight,
          r = t.scrollHeight;
        if (((S = document.compatMode.indexOf('CSS') >= 0 ? o : t), (w = t), e(), (x = !0), top != self)) y = !0;
        else if (r > n && (t.offsetHeight <= n || o.offsetHeight <= n)) {
          var a = !1,
            i = function () {
              a ||
                o.scrollHeight == document.height ||
                ((a = !0),
                setTimeout(function () {
                  (o.style.height = document.height + 'px'), (a = !1);
                }, 100));
            };
          if (((o.style.height = 'auto'), setTimeout(i, 10), S.offsetHeight <= n)) {
            var l = document.createElement('div');
            (l.style.clear = 'both'), t.appendChild(l);
          }
        }
        v.fixedBackground || b || ((t.style.backgroundAttachment = 'scroll'), (o.style.backgroundAttachment = 'scroll'));
      }
    }

    function o(e, t, o, n) {
      if ((n || (n = 1e3), d(t, o), 1 != v.accelerationMax)) {
        var r = +new Date(),
          a = r - C;
        if (a < v.accelerationDelta) {
          var i = (1 + 30 / a) / 2;
          i > 1 && ((i = Math.min(i, v.accelerationMax)), (t *= i), (o *= i));
        }
        C = +new Date();
      }
      if (
        (M.push({
          x: t,
          y: o,
          lastX: 0 > t ? 0.99 : -0.99,
          lastY: 0 > o ? 0.99 : -0.99,
          start: +new Date(),
        }),
        !T)
      ) {
        var l = e === document.body,
          u = function () {
            for (var r = +new Date(), a = 0, i = 0, c = 0; c < M.length; c++) {
              var s = M[c],
                d = r - s.start,
                f = d >= v.animationTime,
                h = f ? 1 : d / v.animationTime;
              v.pulseAlgorithm && (h = p(h));
              var m = (s.x * h - s.lastX) >> 0,
                w = (s.y * h - s.lastY) >> 0;
              (a += m), (i += w), (s.lastX += m), (s.lastY += w), f && (M.splice(c, 1), c--);
            }
            l ? window.scrollBy(a, i) : (a && (e.scrollLeft += a), i && (e.scrollTop += i)), t || o || (M = []), M.length ? E(u, e, n / v.frameRate + 1) : (T = !1);
          };
        E(u, e, 0), (T = !0);
      }
    }

    function n(e) {
      x || t();
      var n = e.target,
        r = l(n);
      if (!r || e.defaultPrevented || s(w, 'embed') || (s(n, 'embed') && /\.pdf/i.test(n.src))) return !0;
      var a = e.wheelDeltaX || 0,
        i = e.wheelDeltaY || 0;
      return (
        a || i || (i = e.wheelDelta || 0),
        !v.touchpadSupport && f(i) ? !0 : (Math.abs(a) > 1.2 && (a *= v.stepSize / 120), Math.abs(i) > 1.2 && (i *= v.stepSize / 120), o(r, -a, -i), void e.preventDefault())
      );
    }

    function r(e) {
      var t = e.target,
        n = e.ctrlKey || e.altKey || e.metaKey || (e.shiftKey && e.keyCode !== H.spacebar);
      if (/input|textarea|select|embed/i.test(t.nodeName) || t.isContentEditable || e.defaultPrevented || n) return !0;
      if (s(t, 'button') && e.keyCode === H.spacebar) return !0;
      var r,
        a = 0,
        i = 0,
        u = l(w),
        c = u.clientHeight;
      switch ((u == document.body && (c = window.innerHeight), e.keyCode)) {
        case H.up:
          i = -v.arrowScroll;
          break;
        case H.down:
          i = v.arrowScroll;
          break;
        case H.spacebar:
          (r = e.shiftKey ? 1 : -1), (i = -r * c * 0.9);
          break;
        case H.pageup:
          i = 0.9 * -c;
          break;
        case H.pagedown:
          i = 0.9 * c;
          break;
        case H.home:
          i = -u.scrollTop;
          break;
        case H.end:
          var d = u.scrollHeight - u.scrollTop - c;
          i = d > 0 ? d + 10 : 0;
          break;
        case H.left:
          a = -v.arrowScroll;
          break;
        case H.right:
          a = v.arrowScroll;
          break;
        default:
          return !0;
      }
      o(u, a, i), e.preventDefault();
    }

    function a(e) {
      w = e.target;
    }

    function i(e, t) {
      for (var o = e.length; o--; ) z[N(e[o])] = t;
      return t;
    }

    function l(e) {
      var t = [],
        o = S.scrollHeight;
      do {
        var n = z[N(e)];
        if (n) return i(t, n);
        if ((t.push(e), o === e.scrollHeight)) {
          if (!y || S.clientHeight + 10 < o) return i(t, document.body);
        } else if (e.clientHeight + 10 < e.scrollHeight && ((overflow = getComputedStyle(e, '').getPropertyValue('overflow-y')), 'scroll' === overflow || 'auto' === overflow)) return i(t, e);
      } while ((e = e.parentNode));
    }

    function u(e, t, o) {
      window.addEventListener(e, t, o || !1);
    }

    function c(e, t, o) {
      window.removeEventListener(e, t, o || !1);
    }

    function s(e, t) {
      return (e.nodeName || '').toLowerCase() === t.toLowerCase();
    }

    function d(e, t) {
      (e = e > 0 ? 1 : -1), (t = t > 0 ? 1 : -1), (k.x !== e || k.y !== t) && ((k.x = e), (k.y = t), (M = []), (C = 0));
    }

    function f(e) {
      if (e) {
        (e = Math.abs(e)), D.push(e), D.shift(), clearTimeout(A);
        var t = D[0] == D[1] && D[1] == D[2],
          o = h(D[0], 120) && h(D[1], 120) && h(D[2], 120);
        return !(t || o);
      }
    }

    function h(e, t) {
      return Math.floor(e / t) == e / t;
    }

    function m(e) {
      var t, o, n;
      return (e *= v.pulseScale), 1 > e ? (t = e - (1 - Math.exp(-e))) : ((o = Math.exp(-1)), (e -= 1), (n = 1 - Math.exp(-e)), (t = o + n * (1 - o))), t * v.pulseNormalize;
    }

    function p(e) {
      return e >= 1 ? 1 : 0 >= e ? 0 : (1 == v.pulseNormalize && (v.pulseNormalize /= m(1)), m(e));
    }

    var settings = $.extend(
      {
        // These are the defaults.
        frameRate: 60,
        animationTime: 1000,
        stepSize: 120,
        pulseAlgorithm: !0,
        pulseScale: 8,
        pulseNormalize: 1,
        accelerationDelta: 20,
        accelerationMax: 1,
        keyboardSupport: !0,
        arrowScroll: 50,
        touchpadSupport: !0,
        fixedBackground: !0,
      },
      options
    );

    var w,
      g = {
        frameRate: settings.frameRate,
        animationTime: settings.animationTime,
        stepSize: settings.stepSize,
        pulseAlgorithm: settings.pulseAlgorithm,
        pulseScale: settings.pulseScale,
        pulseNormalize: settings.pulseNormalize,
        accelerationDelta: settings.accelerationDelta,
        accelerationMax: settings.accelerationMax,
        keyboardSupport: settings.keyboardSupport,
        arrowScroll: settings.arrowScroll,
        touchpadSupport: settings.touchpadSupport,
        fixedBackground: settings.fixedBackground,
        excluded: '',
      },
      v = g,
      b = !1,
      y = !1,
      k = {
        x: 0,
        y: 0,
      },
      x = !1,
      S = document.documentElement,
      D = [120, 120, 120],
      H = {
        left: 37,
        up: 38,
        right: 39,
        down: 40,
        spacebar: 32,
        pageup: 33,
        pagedown: 34,
        end: 35,
        home: 36,
      },
      v = g,
      M = [],
      T = !1,
      C = +new Date(),
      z = {};
    setInterval(function () {
      z = {};
    }, 1e4);
    var A,
      N = (function () {
        var e = 0;
        return function (t) {
          return t.uniqueID || (t.uniqueID = e++);
        };
      })(),
      E = (function () {
        return (
          window.requestAnimationFrame ||
          window.webkitRequestAnimationFrame ||
          function (e, t, o) {
            window.setTimeout(e, o || 1e3 / 60);
          }
        );
      })(),
      K = /chrome|iPad/i.test(window.navigator.userAgent),
      L = 'onmousewheel' in document;
    L && K && (u('mousedown', a), u('mousewheel', n), u('load', t));
  })();
};