// SmoothScroll v0.9.9
// Licensed under the terms of the MIT license.

// People involved
// - Balazs Galambosi: maintainer (CHANGELOG.txt)
// - Patrick Brunner (patrickb1991@gmail.com)
// - Michael Herf: ssc_pulse Algorithm
(function($) {
  function ssc_init() {
    if (!document.body)
      return;
    var e = document.body;
    var t = document.documentElement;
    var n = window.innerHeight;
    var r = e.scrollHeight;
    ssc_root = document.compatMode.indexOf("CSS") >= 0 ? t : e;
    ssc_activeElement = e;
    ssc_initdone = true;
    if (top != self) {
      ssc_frame = true;
    } else if (r > n && (e.offsetHeight <= n || t.offsetHeight <= n)) {
      ssc_root.style.height = "auto";
      if (ssc_root.offsetHeight <= n) {
        var i = document.createElement("div");
        i.style.clear = "both";
        e.appendChild(i);
      }
    }
    if (!ssc_fixedback) {
      e.style.backgroundAttachment = "scroll";
      t.style.backgroundAttachment = "scroll";
    }
    if (ssc_keyboardsupport) {
      ssc_addEvent("keydown", ssc_keydown);
    }
  }
  function ssc_scrollArray(e, t, n, r) {
    r || (r = 1e3);
    ssc_directionCheck(t, n);
    ssc_que.push({x: t, y: n, lastX: t < 0 ? .99 : -.99, lastY: n < 0 ? .99 : -.99, start: +(new Date)});
    if (ssc_pending) {
      return;
    }
    var i = function() {
      var s = +(new Date);
      var o = 0;
      var u = 0;
      for (var a = 0; a < ssc_que.length; a++) {
        var f = ssc_que[a];
        var l = s - f.start;
        var c = l >= ssc_animtime;
        var h = c ? 1 : l / ssc_animtime;
        if (ssc_pulseAlgorithm) {
          h = ssc_pulse(h);
        }
        var p = f.x * h - f.lastX >> 0;
        var d = f.y * h - f.lastY >> 0;
        o += p;
        u += d;
        f.lastX += p;
        f.lastY += d;
        if (c) {
          ssc_que.splice(a, 1);
          a--;
        }
      }
      if (t) {
        var v = e.scrollLeft;
        e.scrollLeft += o;
        if (o && e.scrollLeft === v) {
          t = 0;
        }
      }
      if (n) {
        var m = e.scrollTop;
        e.scrollTop += u;
        if (u && e.scrollTop === m) {
          n = 0;
        }
      }
      if (!t && !n) {
        ssc_que = [];
      }
      if (ssc_que.length) {
        setTimeout(i, r / ssc_framerate + 1);
      } else {
        ssc_pending = false;
      }
    };
    setTimeout(i, 0);
    ssc_pending = true;
  }
  function ssc_wheel(e) {
    if (!ssc_initdone) {
      init();
    }
    var t = e.target;
    var n = ssc_overflowingAncestor(t);
    if (!n || e.defaultPrevented || ssc_isNodeName(ssc_activeElement, "embed") || ssc_isNodeName(t, "embed") && /\.pdf/i.test(t.src)) {
      return true;
    }
    var r = e.wheelDeltaX || 0;
    var i = e.wheelDeltaY || 0;
    if (!r && !i) {
      i = e.wheelDelta || 0;
    }
    if (Math.abs(r) > 1.2) {
      r *= ssc_stepsize / 120;
    }
    if (Math.abs(i) > 1.2) {
      i *= ssc_stepsize / 120;
    }
    ssc_scrollArray(n, -r, -i);
    e.preventDefault();
  }
  function ssc_keydown(e) {
    var t = e.target;
    var n = e.ctrlKey || e.altKey || e.metaKey;
    if (/input|textarea|embed/i.test(t.nodeName) || t.isContentEditable || e.defaultPrevented || n) {
      return true;
    }
    if (ssc_isNodeName(t, "button") && e.keyCode === ssc_key.spacebar) {
      return true;
    }
    var r, i = 0, s = 0;
    var o = ssc_overflowingAncestor(ssc_activeElement);
    var u = o.clientHeight;
    if (o == document.body) {
      u = window.innerHeight;
    }
    switch (e.keyCode) {
      case ssc_key.up:
        s = -ssc_arrowscroll;
        break;
      case ssc_key.down:
        s = ssc_arrowscroll;
        break;
      case ssc_key.spacebar:
        r = e.shiftKey ? 1 : -1;
        s = -r * u * .9;
        break;
      case ssc_key.pageup:
        s = -u * .9;
        break;
      case ssc_key.pagedown:
        s = u * .9;
        break;
      case ssc_key.home:
        s = -o.scrollTop;
        break;
      case ssc_key.end:
        var a = o.scrollHeight - o.scrollTop - u;
        s = a > 0 ? a + 10 : 0;
        break;
      case ssc_key.left:
        i = -ssc_arrowscroll;
        break;
      case ssc_key.right:
        i = ssc_arrowscroll;
        break;
      default:
        return true;
    }
    ssc_scrollArray(o, i, s);
    e.preventDefault();
  }
  function ssc_mousedown(e) {
    ssc_activeElement = e.target;
  }
  function ssc_setCache(e, t) {
    for (var n = e.length; n--; )
      ssc_cache[ssc_uniqueID(e[n])] = t;
    return t;
  }
  function ssc_overflowingAncestor(e) {
    var t = [];
    var n = ssc_root.scrollHeight;
    do {
      var r = ssc_cache[ssc_uniqueID(e)];
      if (r) {
        return ssc_setCache(t, r);
      }
      t.push(e);
      if (n === e.scrollHeight) {
        if (!ssc_frame || ssc_root.clientHeight + 10 < n) {
          return ssc_setCache(t, document.body);
        }
      } else if (e.clientHeight + 10 < e.scrollHeight) {
        overflow = getComputedStyle(e, "").getPropertyValue("overflow");
        if (overflow === "scroll" || overflow === "auto") {
          return ssc_setCache(t, e);
        }
      }
    } while (e = e.parentNode);
  }
  function ssc_addEvent(e, t, n) {
    window.addEventListener(e, t, n || false);
  }
  function ssc_removeEvent(e, t, n) {
    window.removeEventListener(e, t, n || false);
  }
  function ssc_isNodeName(e, t) {
    return e.nodeName.toLowerCase() === t.toLowerCase();
  }
  function ssc_directionCheck(e, t) {
    e = e > 0 ? 1 : -1;
    t = t > 0 ? 1 : -1;
    if (ssc_direction.x !== e || ssc_direction.y !== t) {
      ssc_direction.x = e;
      ssc_direction.y = t;
      ssc_que = [];
    }
  }
  function ssc_pulse_(e) {
    var t, n, r;
    e = e * ssc_pulseScale;
    if (e < 1) {
      t = e - (1 - Math.exp(-e));
    } else {
      n = Math.exp(-1);
      e -= 1;
      r = 1 - Math.exp(-e);
      t = n + r * (1 - n)
    }
    return t * ssc_pulseNormalize;
  }
  function ssc_pulse(e) {
    if (e >= 1)
      return 1;
    if (e <= 0)
      return 0;
    if (ssc_pulseNormalize == 1) {
      ssc_pulseNormalize /= ssc_pulse_(1);
    }
    return ssc_pulse_(e);
  }
  var ssc_framerate = 150;
  var ssc_animtime = 500;
  var ssc_stepsize = 150;
  var ssc_pulseAlgorithm = true;
  var ssc_pulseScale = 6;
  var ssc_pulseNormalize = 1;
  var ssc_keyboardsupport = true;
  var ssc_arrowscroll = 50;
  var ssc_frame = false;
  var ssc_direction = {x: 0, y: 0};
  var ssc_initdone = false;
  var ssc_fixedback = true;
  var ssc_root = document.documentElement;
  var ssc_activeElement;
  var ssc_key = {left: 37, up: 38, right: 39, down: 40, spacebar: 32, pageup: 33, pagedown: 34, end: 35, home: 36};
  var ssc_que = [];
  var ssc_pending = false;
  var ssc_cache = {};
  setInterval(function() {
    ssc_cache = {};
  }, 10 * 1e3);
  var ssc_uniqueID = function() {
    var e = 0;
    return function(t) {
      return t.ssc_uniqueID || (t.ssc_uniqueID = e++);
    };
  }();
  $.browser.chrome = /chrome/.test(navigator.userAgent.toLowerCase());
  if ($.browser.chrome) {
    ssc_addEvent("mousedown", ssc_mousedown);
    ssc_addEvent("mousewheel", ssc_wheel);
    ssc_addEvent("load", ssc_init);
  }
}(jQuery));