friendica_2021-01/library/perfect-scrollbar/perfect-scrollbar.jquery.js

/* perfect-scrollbar v0.6.8 */
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 * 
 * Source: https://github.com/noraesae/perfect-scrollbar
 */
'use strict';

var ps = require('../main')
  , psInstances = require('../plugin/instances');

function mountJQuery(jQuery) {
  jQuery.fn.perfectScrollbar = function (settingOrCommand) {
    return this.each(function () {
      if (typeof settingOrCommand === 'object' ||
          typeof settingOrCommand === 'undefined') {
        // If it's an object or none, initialize.
        var settings = settingOrCommand;

        if (!psInstances.get(this)) {
          ps.initialize(this, settings);
        }
      } else {
        // Unless, it may be a command.
        var command = settingOrCommand;

        if (command === 'update') {
          ps.update(this);
        } else if (command === 'destroy') {
          ps.destroy(this);
        }
      }

      return jQuery(this);
    });
  };
}

if (typeof define === 'function' && define.amd) {
  // AMD. Register as an anonymous module.
  define(['jquery'], mountJQuery);
} else {
  var jq = window.jQuery ? window.jQuery : window.$;
  if (typeof jq !== 'undefined') {
    mountJQuery(jq);
  }
}

module.exports = mountJQuery;

},{"../main":7,"../plugin/instances":18}],2:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

function oldAdd(element, className) {
  var classes = element.className.split(' ');
  if (classes.indexOf(className) < 0) {
    classes.push(className);
  }
  element.className = classes.join(' ');
}

function oldRemove(element, className) {
  var classes = element.className.split(' ');
  var idx = classes.indexOf(className);
  if (idx >= 0) {
    classes.splice(idx, 1);
  }
  element.className = classes.join(' ');
}

exports.add = function (element, className) {
  if (element.classList) {
    element.classList.add(className);
  } else {
    oldAdd(element, className);
  }
};

exports.remove = function (element, className) {
  if (element.classList) {
    element.classList.remove(className);
  } else {
    oldRemove(element, className);
  }
};

exports.list = function (element) {
  if (element.classList) {
    return Array.prototype.slice.apply(element.classList);
  } else {
    return element.className.split(' ');
  }
};

},{}],3:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var DOM = {};

DOM.e = function (tagName, className) {
  var element = document.createElement(tagName);
  element.className = className;
  return element;
};

DOM.appendTo = function (child, parent) {
  parent.appendChild(child);
  return child;
};

function cssGet(element, styleName) {
  return window.getComputedStyle(element)[styleName];
}

function cssSet(element, styleName, styleValue) {
  if (typeof styleValue === 'number') {
    styleValue = styleValue.toString() + 'px';
  }
  element.style[styleName] = styleValue;
  return element;
}

function cssMultiSet(element, obj) {
  for (var key in obj) {
    var val = obj[key];
    if (typeof val === 'number') {
      val = val.toString() + 'px';
    }
    element.style[key] = val;
  }
  return element;
}

DOM.css = function (element, styleNameOrObject, styleValue) {
  if (typeof styleNameOrObject === 'object') {
    // multiple set with object
    return cssMultiSet(element, styleNameOrObject);
  } else {
    if (typeof styleValue === 'undefined') {
      return cssGet(element, styleNameOrObject);
    } else {
      return cssSet(element, styleNameOrObject, styleValue);
    }
  }
};

DOM.matches = function (element, query) {
  if (typeof element.matches !== 'undefined') {
    return element.matches(query);
  } else {
    if (typeof element.matchesSelector !== 'undefined') {
      return element.matchesSelector(query);
    } else if (typeof element.webkitMatchesSelector !== 'undefined') {
      return element.webkitMatchesSelector(query);
    } else if (typeof element.mozMatchesSelector !== 'undefined') {
      return element.mozMatchesSelector(query);
    } else if (typeof element.msMatchesSelector !== 'undefined') {
      return element.msMatchesSelector(query);
    }
  }
};

DOM.remove = function (element) {
  if (typeof element.remove !== 'undefined') {
    element.remove();
  } else {
    if (element.parentNode) {
      element.parentNode.removeChild(element);
    }
  }
};

DOM.queryChildren = function (element, selector) {
  return Array.prototype.filter.call(element.childNodes, function (child) {
    return DOM.matches(child, selector);
  });
};

module.exports = DOM;

},{}],4:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var EventElement = function (element) {
  this.element = element;
  this.events = {};
};

EventElement.prototype.bind = function (eventName, handler) {
  if (typeof this.events[eventName] === 'undefined') {
    this.events[eventName] = [];
  }
  this.events[eventName].push(handler);
  this.element.addEventListener(eventName, handler, false);
};

EventElement.prototype.unbind = function (eventName, handler) {
  var isHandlerProvided = (typeof handler !== 'undefined');
  this.events[eventName] = this.events[eventName].filter(function (hdlr) {
    if (isHandlerProvided && hdlr !== handler) {
      return true;
    }
    this.element.removeEventListener(eventName, hdlr, false);
    return false;
  }, this);
};

EventElement.prototype.unbindAll = function () {
  for (var name in this.events) {
    this.unbind(name);
  }
};

var EventManager = function () {
  this.eventElements = [];
};

EventManager.prototype.eventElement = function (element) {
  var ee = this.eventElements.filter(function (eventElement) {
    return eventElement.element === element;
  })[0];
  if (typeof ee === 'undefined') {
    ee = new EventElement(element);
    this.eventElements.push(ee);
  }
  return ee;
};

EventManager.prototype.bind = function (element, eventName, handler) {
  this.eventElement(element).bind(eventName, handler);
};

EventManager.prototype.unbind = function (element, eventName, handler) {
  this.eventElement(element).unbind(eventName, handler);
};

EventManager.prototype.unbindAll = function () {
  for (var i = 0; i < this.eventElements.length; i++) {
    this.eventElements[i].unbindAll();
  }
};

EventManager.prototype.once = function (element, eventName, handler) {
  var ee = this.eventElement(element);
  var onceHandler = function (e) {
    ee.unbind(eventName, onceHandler);
    handler(e);
  };
  ee.bind(eventName, onceHandler);
};

module.exports = EventManager;

},{}],5:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

module.exports = (function () {
  function s4() {
    return Math.floor((1 + Math.random()) * 0x10000)
               .toString(16)
               .substring(1);
  }
  return function () {
    return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
           s4() + '-' + s4() + s4() + s4();
  };
})();

},{}],6:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var cls = require('./class')
  , d = require('./dom');

exports.toInt = function (x) {
  return parseInt(x, 10) || 0;
};

exports.clone = function (obj) {
  if (obj === null) {
    return null;
  } else if (typeof obj === 'object') {
    var result = {};
    for (var key in obj) {
      result[key] = this.clone(obj[key]);
    }
    return result;
  } else {
    return obj;
  }
};

exports.extend = function (original, source) {
  var result = this.clone(original);
  for (var key in source) {
    result[key] = this.clone(source[key]);
  }
  return result;
};

exports.isEditable = function (el) {
  return d.matches(el, "input,[contenteditable]") ||
         d.matches(el, "select,[contenteditable]") ||
         d.matches(el, "textarea,[contenteditable]") ||
         d.matches(el, "button,[contenteditable]");
};

exports.removePsClasses = function (element) {
  var clsList = cls.list(element);
  for (var i = 0; i < clsList.length; i++) {
    var className = clsList[i];
    if (className.indexOf('ps-') === 0) {
      cls.remove(element, className);
    }
  }
};

exports.outerWidth = function (element) {
  return this.toInt(d.css(element, 'width')) +
         this.toInt(d.css(element, 'paddingLeft')) +
         this.toInt(d.css(element, 'paddingRight')) +
         this.toInt(d.css(element, 'borderLeftWidth')) +
         this.toInt(d.css(element, 'borderRightWidth'));
};

exports.startScrolling = function (element, axis) {
  cls.add(element, 'ps-in-scrolling');
  if (typeof axis !== 'undefined') {
    cls.add(element, 'ps-' + axis);
  } else {
    cls.add(element, 'ps-x');
    cls.add(element, 'ps-y');
  }
};

exports.stopScrolling = function (element, axis) {
  cls.remove(element, 'ps-in-scrolling');
  if (typeof axis !== 'undefined') {
    cls.remove(element, 'ps-' + axis);
  } else {
    cls.remove(element, 'ps-x');
    cls.remove(element, 'ps-y');
  }
};

exports.env = {
  isWebKit: 'WebkitAppearance' in document.documentElement.style,
  supportsTouch: (('ontouchstart' in window) || window.DocumentTouch && document instanceof window.DocumentTouch),
  supportsIePointer: window.navigator.msMaxTouchPoints !== null
};

},{"./class":2,"./dom":3}],7:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var destroy = require('./plugin/destroy')
  , initialize = require('./plugin/initialize')
  , update = require('./plugin/update');

module.exports = {
  initialize: initialize,
  update: update,
  destroy: destroy
};

},{"./plugin/destroy":9,"./plugin/initialize":17,"./plugin/update":21}],8:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

module.exports = {
  maxScrollbarLength: null,
  minScrollbarLength: null,
  scrollXMarginOffset: 0,
  scrollYMarginOffset: 0,
  stopPropagationOnClick: true,
  suppressScrollX: false,
  suppressScrollY: false,
  swipePropagation: true,
  useBothWheelAxes: false,
  useKeyboard: true,
  useSelectionScroll: false,
  wheelPropagation: false,
  wheelSpeed: 1
};

},{}],9:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var d = require('../lib/dom')
  , h = require('../lib/helper')
  , instances = require('./instances');

module.exports = function (element) {
  var i = instances.get(element);

  if (!i) {
    return;
  }

  i.event.unbindAll();
  d.remove(i.scrollbarX);
  d.remove(i.scrollbarY);
  d.remove(i.scrollbarXRail);
  d.remove(i.scrollbarYRail);
  h.removePsClasses(element);

  instances.remove(element);
};

},{"../lib/dom":3,"../lib/helper":6,"./instances":18}],10:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var h = require('../../lib/helper')
  , instances = require('../instances')
  , updateGeometry = require('../update-geometry')
  , updateScroll = require('../update-scroll');

function bindClickRailHandler(element, i) {
  function pageOffset(el) {
    return el.getBoundingClientRect();
  }
  var stopPropagation = window.Event.prototype.stopPropagation.bind;

  if (i.settings.stopPropagationOnClick) {
    i.event.bind(i.scrollbarY, 'click', stopPropagation);
  }
  i.event.bind(i.scrollbarYRail, 'click', function (e) {
    var halfOfScrollbarLength = h.toInt(i.scrollbarYHeight / 2);
    var positionTop = i.railYRatio * (e.pageY - window.pageYOffset - pageOffset(i.scrollbarYRail).top - halfOfScrollbarLength);
    var maxPositionTop = i.railYRatio * (i.railYHeight - i.scrollbarYHeight);
    var positionRatio = positionTop / maxPositionTop;

    if (positionRatio < 0) {
      positionRatio = 0;
    } else if (positionRatio > 1) {
      positionRatio = 1;
    }

    updateScroll(element, 'top', (i.contentHeight - i.containerHeight) * positionRatio);
    updateGeometry(element);

    e.stopPropagation();
  });

  if (i.settings.stopPropagationOnClick) {
    i.event.bind(i.scrollbarX, 'click', stopPropagation);
  }
  i.event.bind(i.scrollbarXRail, 'click', function (e) {
    var halfOfScrollbarLength = h.toInt(i.scrollbarXWidth / 2);
    var positionLeft = i.railXRatio * (e.pageX - window.pageXOffset - pageOffset(i.scrollbarXRail).left - halfOfScrollbarLength);
    var maxPositionLeft = i.railXRatio * (i.railXWidth - i.scrollbarXWidth);
    var positionRatio = positionLeft / maxPositionLeft;

    if (positionRatio < 0) {
      positionRatio = 0;
    } else if (positionRatio > 1) {
      positionRatio = 1;
    }

    updateScroll(element, 'left', ((i.contentWidth - i.containerWidth) * positionRatio) - i.negativeScrollAdjustment);
    updateGeometry(element);

    e.stopPropagation();
  });
}

module.exports = function (element) {
  var i = instances.get(element);
  bindClickRailHandler(element, i);
};

},{"../../lib/helper":6,"../instances":18,"../update-geometry":19,"../update-scroll":20}],11:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var d = require('../../lib/dom')
  , h = require('../../lib/helper')
  , instances = require('../instances')
  , updateGeometry = require('../update-geometry')
  , updateScroll = require('../update-scroll');

function bindMouseScrollXHandler(element, i) {
  var currentLeft = null;
  var currentPageX = null;

  function updateScrollLeft(deltaX) {
    var newLeft = currentLeft + (deltaX * i.railXRatio);
    var maxLeft = Math.max(0, i.scrollbarXRail.getBoundingClientRect().left) + (i.railXRatio * (i.railXWidth - i.scrollbarXWidth));

    if (newLeft < 0) {
      i.scrollbarXLeft = 0;
    } else if (newLeft > maxLeft) {
      i.scrollbarXLeft = maxLeft;
    } else {
      i.scrollbarXLeft = newLeft;
    }

    var scrollLeft = h.toInt(i.scrollbarXLeft * (i.contentWidth - i.containerWidth) / (i.containerWidth - (i.railXRatio * i.scrollbarXWidth))) - i.negativeScrollAdjustment;
    updateScroll(element, 'left', scrollLeft);
  }

  var mouseMoveHandler = function (e) {
    updateScrollLeft(e.pageX - currentPageX);
    updateGeometry(element);
    e.stopPropagation();
    e.preventDefault();
  };

  var mouseUpHandler = function () {
    h.stopScrolling(element, 'x');
    i.event.unbind(i.ownerDocument, 'mousemove', mouseMoveHandler);
  };

  i.event.bind(i.scrollbarX, 'mousedown', function (e) {
    currentPageX = e.pageX;
    currentLeft = h.toInt(d.css(i.scrollbarX, 'left')) * i.railXRatio;
    h.startScrolling(element, 'x');

    i.event.bind(i.ownerDocument, 'mousemove', mouseMoveHandler);
    i.event.once(i.ownerDocument, 'mouseup', mouseUpHandler);

    e.stopPropagation();
    e.preventDefault();
  });
}

function bindMouseScrollYHandler(element, i) {
  var currentTop = null;
  var currentPageY = null;

  function updateScrollTop(deltaY) {
    var newTop = currentTop + (deltaY * i.railYRatio);
    var maxTop = Math.max(0, i.scrollbarYRail.getBoundingClientRect().top) + (i.railYRatio * (i.railYHeight - i.scrollbarYHeight));

    if (newTop < 0) {
      i.scrollbarYTop = 0;
    } else if (newTop > maxTop) {
      i.scrollbarYTop = maxTop;
    } else {
      i.scrollbarYTop = newTop;
    }

    var scrollTop = h.toInt(i.scrollbarYTop * (i.contentHeight - i.containerHeight) / (i.containerHeight - (i.railYRatio * i.scrollbarYHeight)));
    updateScroll(element, 'top', scrollTop);
  }

  var mouseMoveHandler = function (e) {
    updateScrollTop(e.pageY - currentPageY);
    updateGeometry(element);
    e.stopPropagation();
    e.preventDefault();
  };

  var mouseUpHandler = function () {
    h.stopScrolling(element, 'y');
    i.event.unbind(i.ownerDocument, 'mousemove', mouseMoveHandler);
  };

  i.event.bind(i.scrollbarY, 'mousedown', function (e) {
    currentPageY = e.pageY;
    currentTop = h.toInt(d.css(i.scrollbarY, 'top')) * i.railYRatio;
    h.startScrolling(element, 'y');

    i.event.bind(i.ownerDocument, 'mousemove', mouseMoveHandler);
    i.event.once(i.ownerDocument, 'mouseup', mouseUpHandler);

    e.stopPropagation();
    e.preventDefault();
  });
}

module.exports = function (element) {
  var i = instances.get(element);
  bindMouseScrollXHandler(element, i);
  bindMouseScrollYHandler(element, i);
};

},{"../../lib/dom":3,"../../lib/helper":6,"../instances":18,"../update-geometry":19,"../update-scroll":20}],12:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var h = require('../../lib/helper')
  , instances = require('../instances')
  , updateGeometry = require('../update-geometry')
  , updateScroll = require('../update-scroll');

function bindKeyboardHandler(element, i) {
  var hovered = false;
  i.event.bind(element, 'mouseenter', function () {
    hovered = true;
  });
  i.event.bind(element, 'mouseleave', function () {
    hovered = false;
  });

  var shouldPrevent = false;
  function shouldPreventDefault(deltaX, deltaY) {
    var scrollTop = element.scrollTop;
    if (deltaX === 0) {
      if (!i.scrollbarYActive) {
        return false;
      }
      if ((scrollTop === 0 && deltaY > 0) || (scrollTop >= i.contentHeight - i.containerHeight && deltaY < 0)) {
        return !i.settings.wheelPropagation;
      }
    }

    var scrollLeft = element.scrollLeft;
    if (deltaY === 0) {
      if (!i.scrollbarXActive) {
        return false;
      }
      if ((scrollLeft === 0 && deltaX < 0) || (scrollLeft >= i.contentWidth - i.containerWidth && deltaX > 0)) {
        return !i.settings.wheelPropagation;
      }
    }
    return true;
  }

  i.event.bind(i.ownerDocument, 'keydown', function (e) {
    if (e.isDefaultPrevented && e.isDefaultPrevented()) {
      return;
    }

    if (!hovered) {
      return;
    }

    var activeElement = document.activeElement ? document.activeElement : i.ownerDocument.activeElement;
    if (activeElement) {
      // go deeper if element is a webcomponent
      while (activeElement.shadowRoot) {
        activeElement = activeElement.shadowRoot.activeElement;
      }
      if (h.isEditable(activeElement)) {
        return;
      }
    }

    var deltaX = 0;
    var deltaY = 0;

    switch (e.which) {
    case 37: // left
      deltaX = -30;
      break;
    case 38: // up
      deltaY = 30;
      break;
    case 39: // right
      deltaX = 30;
      break;
    case 40: // down
      deltaY = -30;
      break;
    case 33: // page up
      deltaY = 90;
      break;
    case 32: // space bar
      if (e.shiftKey) {
        deltaY = 90;
      } else {
        deltaY = -90;
      }
      break;
    case 34: // page down
      deltaY = -90;
      break;
    case 35: // end
      if (e.ctrlKey) {
        deltaY = -i.contentHeight;
      } else {
        deltaY = -i.containerHeight;
      }
      break;
    case 36: // home
      if (e.ctrlKey) {
        deltaY = element.scrollTop;
      } else {
        deltaY = i.containerHeight;
      }
      break;
    default:
      return;
    }

    updateScroll(element, 'top', element.scrollTop - deltaY);
    updateScroll(element, 'left', element.scrollLeft + deltaX);
    updateGeometry(element);

    shouldPrevent = shouldPreventDefault(deltaX, deltaY);
    if (shouldPrevent) {
      e.preventDefault();
    }
  });
}

module.exports = function (element) {
  var i = instances.get(element);
  bindKeyboardHandler(element, i);
};

},{"../../lib/helper":6,"../instances":18,"../update-geometry":19,"../update-scroll":20}],13:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var instances = require('../instances')
  , updateGeometry = require('../update-geometry')
  , updateScroll = require('../update-scroll');

function bindMouseWheelHandler(element, i) {
  var shouldPrevent = false;

  function shouldPreventDefault(deltaX, deltaY) {
    var scrollTop = element.scrollTop;
    if (deltaX === 0) {
      if (!i.scrollbarYActive) {
        return false;
      }
      if ((scrollTop === 0 && deltaY > 0) || (scrollTop >= i.contentHeight - i.containerHeight && deltaY < 0)) {
        return !i.settings.wheelPropagation;
      }
    }

    var scrollLeft = element.scrollLeft;
    if (deltaY === 0) {
      if (!i.scrollbarXActive) {
        return false;
      }
      if ((scrollLeft === 0 && deltaX < 0) || (scrollLeft >= i.contentWidth - i.containerWidth && deltaX > 0)) {
        return !i.settings.wheelPropagation;
      }
    }
    return true;
  }

  function getDeltaFromEvent(e) {
    var deltaX = e.deltaX;
    var deltaY = -1 * e.deltaY;

    if (typeof deltaX === "undefined" || typeof deltaY === "undefined") {
      // OS X Safari
      deltaX = -1 * e.wheelDeltaX / 6;
      deltaY = e.wheelDeltaY / 6;
    }

    if (e.deltaMode && e.deltaMode === 1) {
      // Firefox in deltaMode 1: Line scrolling
      deltaX *= 10;
      deltaY *= 10;
    }

    if (deltaX !== deltaX && deltaY !== deltaY/* NaN checks */) {
      // IE in some mouse drivers
      deltaX = 0;
      deltaY = e.wheelDelta;
    }

    return [deltaX, deltaY];
  }

  function shouldBeConsumedByTextarea(deltaX, deltaY) {
    var hoveredTextarea = element.querySelector('textarea:hover');
    if (hoveredTextarea) {
      var maxScrollTop = hoveredTextarea.scrollHeight - hoveredTextarea.clientHeight;
      if (maxScrollTop > 0) {
        if (!(hoveredTextarea.scrollTop === 0 && deltaY > 0) &&
            !(hoveredTextarea.scrollTop === maxScrollTop && deltaY < 0)) {
          return true;
        }
      }
      var maxScrollLeft = hoveredTextarea.scrollLeft - hoveredTextarea.clientWidth;
      if (maxScrollLeft > 0) {
        if (!(hoveredTextarea.scrollLeft === 0 && deltaX < 0) &&
            !(hoveredTextarea.scrollLeft === maxScrollLeft && deltaX > 0)) {
          return true;
        }
      }
    }
    return false;
  }

  function mousewheelHandler(e) {
    var delta = getDeltaFromEvent(e);

    var deltaX = delta[0];
    var deltaY = delta[1];

    if (shouldBeConsumedByTextarea(deltaX, deltaY)) {
      return;
    }

    shouldPrevent = false;
    if (!i.settings.useBothWheelAxes) {
      // deltaX will only be used for horizontal scrolling and deltaY will
      // only be used for vertical scrolling - this is the default
      updateScroll(element, 'top', element.scrollTop - (deltaY * i.settings.wheelSpeed));
      updateScroll(element, 'left', element.scrollLeft + (deltaX * i.settings.wheelSpeed));
    } else if (i.scrollbarYActive && !i.scrollbarXActive) {
      // only vertical scrollbar is active and useBothWheelAxes option is
      // active, so let's scroll vertical bar using both mouse wheel axes
      if (deltaY) {
        updateScroll(element, 'top', element.scrollTop - (deltaY * i.settings.wheelSpeed));
      } else {
        updateScroll(element, 'top', element.scrollTop + (deltaX * i.settings.wheelSpeed));
      }
      shouldPrevent = true;
    } else if (i.scrollbarXActive && !i.scrollbarYActive) {
      // useBothWheelAxes and only horizontal bar is active, so use both
      // wheel axes for horizontal bar
      if (deltaX) {
        updateScroll(element, 'left', element.scrollLeft + (deltaX * i.settings.wheelSpeed));
      } else {
        updateScroll(element, 'left', element.scrollLeft - (deltaY * i.settings.wheelSpeed));
      }
      shouldPrevent = true;
    }

    updateGeometry(element);

    shouldPrevent = (shouldPrevent || shouldPreventDefault(deltaX, deltaY));
    if (shouldPrevent) {
      e.stopPropagation();
      e.preventDefault();
    }
  }

  if (typeof window.onwheel !== "undefined") {
    i.event.bind(element, 'wheel', mousewheelHandler);
  } else if (typeof window.onmousewheel !== "undefined") {
    i.event.bind(element, 'mousewheel', mousewheelHandler);
  }
}

module.exports = function (element) {
  var i = instances.get(element);
  bindMouseWheelHandler(element, i);
};

},{"../instances":18,"../update-geometry":19,"../update-scroll":20}],14:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var instances = require('../instances')
  , updateGeometry = require('../update-geometry');

function bindNativeScrollHandler(element, i) {
  i.event.bind(element, 'scroll', function () {
    updateGeometry(element);
  });
}

module.exports = function (element) {
  var i = instances.get(element);
  bindNativeScrollHandler(element, i);
};

},{"../instances":18,"../update-geometry":19}],15:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var h = require('../../lib/helper')
  , instances = require('../instances')
  , updateGeometry = require('../update-geometry')
  , updateScroll = require('../update-scroll');

function bindSelectionHandler(element, i) {
  function getRangeNode() {
    var selection = window.getSelection ? window.getSelection() :
                    document.getSelection ? document.getSelection() : '';
    if (selection.toString().length === 0) {
      return null;
    } else {
      return selection.getRangeAt(0).commonAncestorContainer;
    }
  }

  var scrollingLoop = null;
  var scrollDiff = {top: 0, left: 0};
  function startScrolling() {
    if (!scrollingLoop) {
      scrollingLoop = setInterval(function () {
        if (!instances.get(element)) {
          clearInterval(scrollingLoop);
          return;
        }

        updateScroll(element, 'top', element.scrollTop + scrollDiff.top);
        updateScroll(element, 'left', element.scrollLeft + scrollDiff.left);
        updateGeometry(element);
      }, 50); // every .1 sec
    }
  }
  function stopScrolling() {
    if (scrollingLoop) {
      clearInterval(scrollingLoop);
      scrollingLoop = null;
    }
    h.stopScrolling(element);
  }

  var isSelected = false;
  i.event.bind(i.ownerDocument, 'selectionchange', function () {
    if (element.contains(getRangeNode())) {
      isSelected = true;
    } else {
      isSelected = false;
      stopScrolling();
    }
  });
  i.event.bind(window, 'mouseup', function () {
    if (isSelected) {
      isSelected = false;
      stopScrolling();
    }
  });

  i.event.bind(window, 'mousemove', function (e) {
    if (isSelected) {
      var mousePosition = {x: e.pageX, y: e.pageY};
      var containerGeometry = {
        left: element.offsetLeft,
        right: element.offsetLeft + element.offsetWidth,
        top: element.offsetTop,
        bottom: element.offsetTop + element.offsetHeight
      };

      if (mousePosition.x < containerGeometry.left + 3) {
        scrollDiff.left = -5;
        h.startScrolling(element, 'x');
      } else if (mousePosition.x > containerGeometry.right - 3) {
        scrollDiff.left = 5;
        h.startScrolling(element, 'x');
      } else {
        scrollDiff.left = 0;
      }

      if (mousePosition.y < containerGeometry.top + 3) {
        if (containerGeometry.top + 3 - mousePosition.y < 5) {
          scrollDiff.top = -5;
        } else {
          scrollDiff.top = -20;
        }
        h.startScrolling(element, 'y');
      } else if (mousePosition.y > containerGeometry.bottom - 3) {
        if (mousePosition.y - containerGeometry.bottom + 3 < 5) {
          scrollDiff.top = 5;
        } else {
          scrollDiff.top = 20;
        }
        h.startScrolling(element, 'y');
      } else {
        scrollDiff.top = 0;
      }

      if (scrollDiff.top === 0 && scrollDiff.left === 0) {
        stopScrolling();
      } else {
        startScrolling();
      }
    }
  });
}

module.exports = function (element) {
  var i = instances.get(element);
  bindSelectionHandler(element, i);
};

},{"../../lib/helper":6,"../instances":18,"../update-geometry":19,"../update-scroll":20}],16:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var instances = require('../instances')
  , updateGeometry = require('../update-geometry')
  , updateScroll = require('../update-scroll');

function bindTouchHandler(element, i, supportsTouch, supportsIePointer) {
  function shouldPreventDefault(deltaX, deltaY) {
    var scrollTop = element.scrollTop;
    var scrollLeft = element.scrollLeft;
    var magnitudeX = Math.abs(deltaX);
    var magnitudeY = Math.abs(deltaY);

    if (magnitudeY > magnitudeX) {
      // user is perhaps trying to swipe up/down the page

      if (((deltaY < 0) && (scrollTop === i.contentHeight - i.containerHeight)) ||
          ((deltaY > 0) && (scrollTop === 0))) {
        return !i.settings.swipePropagation;
      }
    } else if (magnitudeX > magnitudeY) {
      // user is perhaps trying to swipe left/right across the page

      if (((deltaX < 0) && (scrollLeft === i.contentWidth - i.containerWidth)) ||
          ((deltaX > 0) && (scrollLeft === 0))) {
        return !i.settings.swipePropagation;
      }
    }

    return true;
  }

  function applyTouchMove(differenceX, differenceY) {
    updateScroll(element, 'top', element.scrollTop - differenceY);
    updateScroll(element, 'left', element.scrollLeft - differenceX);

    updateGeometry(element);
  }

  var startOffset = {};
  var startTime = 0;
  var speed = {};
  var easingLoop = null;
  var inGlobalTouch = false;
  var inLocalTouch = false;

  function globalTouchStart() {
    inGlobalTouch = true;
  }
  function globalTouchEnd() {
    inGlobalTouch = false;
  }

  function getTouch(e) {
    if (e.targetTouches) {
      return e.targetTouches[0];
    } else {
      // Maybe IE pointer
      return e;
    }
  }
  function shouldHandle(e) {
    if (e.targetTouches && e.targetTouches.length === 1) {
      return true;
    }
    if (e.pointerType && e.pointerType !== 'mouse' && e.pointerType !== e.MSPOINTER_TYPE_MOUSE) {
      return true;
    }
    return false;
  }
  function touchStart(e) {
    if (shouldHandle(e)) {
      inLocalTouch = true;

      var touch = getTouch(e);

      startOffset.pageX = touch.pageX;
      startOffset.pageY = touch.pageY;

      startTime = (new Date()).getTime();

      if (easingLoop !== null) {
        clearInterval(easingLoop);
      }

      e.stopPropagation();
    }
  }
  function touchMove(e) {
    if (!inGlobalTouch && inLocalTouch && shouldHandle(e)) {
      var touch = getTouch(e);

      var currentOffset = {pageX: touch.pageX, pageY: touch.pageY};

      var differenceX = currentOffset.pageX - startOffset.pageX;
      var differenceY = currentOffset.pageY - startOffset.pageY;

      applyTouchMove(differenceX, differenceY);
      startOffset = currentOffset;

      var currentTime = (new Date()).getTime();

      var timeGap = currentTime - startTime;
      if (timeGap > 0) {
        speed.x = differenceX / timeGap;
        speed.y = differenceY / timeGap;
        startTime = currentTime;
      }

      if (shouldPreventDefault(differenceX, differenceY)) {
        e.stopPropagation();
        e.preventDefault();
      }
    }
  }
  function touchEnd() {
    if (!inGlobalTouch && inLocalTouch) {
      inLocalTouch = false;

      clearInterval(easingLoop);
      easingLoop = setInterval(function () {
        if (!instances.get(element)) {
          clearInterval(easingLoop);
          return;
        }

        if (Math.abs(speed.x) < 0.01 && Math.abs(speed.y) < 0.01) {
          clearInterval(easingLoop);
          return;
        }

        applyTouchMove(speed.x * 30, speed.y * 30);

        speed.x *= 0.8;
        speed.y *= 0.8;
      }, 10);
    }
  }

  if (supportsTouch) {
    i.event.bind(window, 'touchstart', globalTouchStart);
    i.event.bind(window, 'touchend', globalTouchEnd);
    i.event.bind(element, 'touchstart', touchStart);
    i.event.bind(element, 'touchmove', touchMove);
    i.event.bind(element, 'touchend', touchEnd);
  }

  if (supportsIePointer) {
    if (window.PointerEvent) {
      i.event.bind(window, 'pointerdown', globalTouchStart);
      i.event.bind(window, 'pointerup', globalTouchEnd);
      i.event.bind(element, 'pointerdown', touchStart);
      i.event.bind(element, 'pointermove', touchMove);
      i.event.bind(element, 'pointerup', touchEnd);
    } else if (window.MSPointerEvent) {
      i.event.bind(window, 'MSPointerDown', globalTouchStart);
      i.event.bind(window, 'MSPointerUp', globalTouchEnd);
      i.event.bind(element, 'MSPointerDown', touchStart);
      i.event.bind(element, 'MSPointerMove', touchMove);
      i.event.bind(element, 'MSPointerUp', touchEnd);
    }
  }
}

module.exports = function (element, supportsTouch, supportsIePointer) {
  var i = instances.get(element);
  bindTouchHandler(element, i, supportsTouch, supportsIePointer);
};

},{"../instances":18,"../update-geometry":19,"../update-scroll":20}],17:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var cls = require('../lib/class')
  , h = require('../lib/helper')
  , instances = require('./instances')
  , updateGeometry = require('./update-geometry');

// Handlers
var clickRailHandler = require('./handler/click-rail')
  , dragScrollbarHandler = require('./handler/drag-scrollbar')
  , keyboardHandler = require('./handler/keyboard')
  , mouseWheelHandler = require('./handler/mouse-wheel')
  , nativeScrollHandler = require('./handler/native-scroll')
  , selectionHandler = require('./handler/selection')
  , touchHandler = require('./handler/touch');

module.exports = function (element, userSettings) {
  userSettings = typeof userSettings === 'object' ? userSettings : {};

  cls.add(element, 'ps-container');

  // Create a plugin instance.
  var i = instances.add(element);

  i.settings = h.extend(i.settings, userSettings);

  clickRailHandler(element);
  dragScrollbarHandler(element);
  mouseWheelHandler(element);
  nativeScrollHandler(element);

  if (i.settings.useSelectionScroll) {
    selectionHandler(element);
  }

  if (h.env.supportsTouch || h.env.supportsIePointer) {
    touchHandler(element, h.env.supportsTouch, h.env.supportsIePointer);
  }
  if (i.settings.useKeyboard) {
    keyboardHandler(element);
  }

  updateGeometry(element);
};

},{"../lib/class":2,"../lib/helper":6,"./handler/click-rail":10,"./handler/drag-scrollbar":11,"./handler/keyboard":12,"./handler/mouse-wheel":13,"./handler/native-scroll":14,"./handler/selection":15,"./handler/touch":16,"./instances":18,"./update-geometry":19}],18:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var d = require('../lib/dom')
  , defaultSettings = require('./default-setting')
  , EventManager = require('../lib/event-manager')
  , guid = require('../lib/guid')
  , h = require('../lib/helper');

var instances = {};

function Instance(element) {
  var i = this;

  i.settings = h.clone(defaultSettings);
  i.containerWidth = null;
  i.containerHeight = null;
  i.contentWidth = null;
  i.contentHeight = null;

  i.isRtl = d.css(element, 'direction') === "rtl";
  i.isNegativeScroll = (function () {
    var originalScrollLeft = element.scrollLeft;
    var result = null;
    element.scrollLeft = -1;
    result = element.scrollLeft < 0;
    element.scrollLeft = originalScrollLeft;
    return result;
  })();
  i.negativeScrollAdjustment = i.isNegativeScroll ? element.scrollWidth - element.clientWidth : 0;
  i.event = new EventManager();
  i.ownerDocument = element.ownerDocument || document;

  i.scrollbarXRail = d.appendTo(d.e('div', 'ps-scrollbar-x-rail'), element);
  i.scrollbarX = d.appendTo(d.e('div', 'ps-scrollbar-x'), i.scrollbarXRail);
  i.scrollbarX.setAttribute('tabindex', 0);
  i.scrollbarXActive = null;
  i.scrollbarXWidth = null;
  i.scrollbarXLeft = null;
  i.scrollbarXBottom = h.toInt(d.css(i.scrollbarXRail, 'bottom'));
  i.isScrollbarXUsingBottom = i.scrollbarXBottom === i.scrollbarXBottom; // !isNaN
  i.scrollbarXTop = i.isScrollbarXUsingBottom ? null : h.toInt(d.css(i.scrollbarXRail, 'top'));
  i.railBorderXWidth = h.toInt(d.css(i.scrollbarXRail, 'borderLeftWidth')) + h.toInt(d.css(i.scrollbarXRail, 'borderRightWidth'));
  // Set rail to display:block to calculate margins
  d.css(i.scrollbarXRail, 'display', 'block');
  i.railXMarginWidth = h.toInt(d.css(i.scrollbarXRail, 'marginLeft')) + h.toInt(d.css(i.scrollbarXRail, 'marginRight'));
  d.css(i.scrollbarXRail, 'display', '');
  i.railXWidth = null;
  i.railXRatio = null;

  i.scrollbarYRail = d.appendTo(d.e('div', 'ps-scrollbar-y-rail'), element);
  i.scrollbarY = d.appendTo(d.e('div', 'ps-scrollbar-y'), i.scrollbarYRail);
  i.scrollbarY.setAttribute('tabindex', 0);
  i.scrollbarYActive = null;
  i.scrollbarYHeight = null;
  i.scrollbarYTop = null;
  i.scrollbarYRight = h.toInt(d.css(i.scrollbarYRail, 'right'));
  i.isScrollbarYUsingRight = i.scrollbarYRight === i.scrollbarYRight; // !isNaN
  i.scrollbarYLeft = i.isScrollbarYUsingRight ? null : h.toInt(d.css(i.scrollbarYRail, 'left'));
  i.scrollbarYOuterWidth = i.isRtl ? h.outerWidth(i.scrollbarY) : null;
  i.railBorderYWidth = h.toInt(d.css(i.scrollbarYRail, 'borderTopWidth')) + h.toInt(d.css(i.scrollbarYRail, 'borderBottomWidth'));
  d.css(i.scrollbarYRail, 'display', 'block');
  i.railYMarginHeight = h.toInt(d.css(i.scrollbarYRail, 'marginTop')) + h.toInt(d.css(i.scrollbarYRail, 'marginBottom'));
  d.css(i.scrollbarYRail, 'display', '');
  i.railYHeight = null;
  i.railYRatio = null;
}

function getId(element) {
  if (typeof element.dataset === 'undefined') {
    return element.getAttribute('data-ps-id');
  } else {
    return element.dataset.psId;
  }
}

function setId(element, id) {
  if (typeof element.dataset === 'undefined') {
    element.setAttribute('data-ps-id', id);
  } else {
    element.dataset.psId = id;
  }
}

function removeId(element) {
  if (typeof element.dataset === 'undefined') {
    element.removeAttribute('data-ps-id');
  } else {
    delete element.dataset.psId;
  }
}

exports.add = function (element) {
  var newId = guid();
  setId(element, newId);
  instances[newId] = new Instance(element);
  return instances[newId];
};

exports.remove = function (element) {
  delete instances[getId(element)];
  removeId(element);
};

exports.get = function (element) {
  return instances[getId(element)];
};

},{"../lib/dom":3,"../lib/event-manager":4,"../lib/guid":5,"../lib/helper":6,"./default-setting":8}],19:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var cls = require('../lib/class')
  , d = require('../lib/dom')
  , h = require('../lib/helper')
  , instances = require('./instances')
  , updateScroll = require('./update-scroll');

function getThumbSize(i, thumbSize) {
  if (i.settings.minScrollbarLength) {
    thumbSize = Math.max(thumbSize, i.settings.minScrollbarLength);
  }
  if (i.settings.maxScrollbarLength) {
    thumbSize = Math.min(thumbSize, i.settings.maxScrollbarLength);
  }
  return thumbSize;
}

function updateCss(element, i) {
  var xRailOffset = {width: i.railXWidth};
  if (i.isRtl) {
    xRailOffset.left = i.negativeScrollAdjustment + element.scrollLeft + i.containerWidth - i.contentWidth;
  } else {
    xRailOffset.left = element.scrollLeft;
  }
  if (i.isScrollbarXUsingBottom) {
    xRailOffset.bottom = i.scrollbarXBottom - element.scrollTop;
  } else {
    xRailOffset.top = i.scrollbarXTop + element.scrollTop;
  }
  d.css(i.scrollbarXRail, xRailOffset);

  var yRailOffset = {top: element.scrollTop, height: i.railYHeight};
  if (i.isScrollbarYUsingRight) {
    if (i.isRtl) {
      yRailOffset.right = i.contentWidth - (i.negativeScrollAdjustment + element.scrollLeft) - i.scrollbarYRight - i.scrollbarYOuterWidth;
    } else {
      yRailOffset.right = i.scrollbarYRight - element.scrollLeft;
    }
  } else {
    if (i.isRtl) {
      yRailOffset.left = i.negativeScrollAdjustment + element.scrollLeft + i.containerWidth * 2 - i.contentWidth - i.scrollbarYLeft - i.scrollbarYOuterWidth;
    } else {
      yRailOffset.left = i.scrollbarYLeft + element.scrollLeft;
    }
  }
  d.css(i.scrollbarYRail, yRailOffset);

  d.css(i.scrollbarX, {left: i.scrollbarXLeft, width: i.scrollbarXWidth - i.railBorderXWidth});
  d.css(i.scrollbarY, {top: i.scrollbarYTop, height: i.scrollbarYHeight - i.railBorderYWidth});
}

module.exports = function (element) {
  var i = instances.get(element);

  i.containerWidth = element.clientWidth;
  i.containerHeight = element.clientHeight;
  i.contentWidth = element.scrollWidth;
  i.contentHeight = element.scrollHeight;

  var existingRails;
  if (!element.contains(i.scrollbarXRail)) {
    existingRails = d.queryChildren(element, '.ps-scrollbar-x-rail');
    if (existingRails.length > 0) {
      existingRails.forEach(function (rail) {
        d.remove(rail);
      });
    }
    d.appendTo(i.scrollbarXRail, element);
  }
  if (!element.contains(i.scrollbarYRail)) {
    existingRails = d.queryChildren(element, '.ps-scrollbar-y-rail');
    if (existingRails.length > 0) {
      existingRails.forEach(function (rail) {
        d.remove(rail);
      });
    }
    d.appendTo(i.scrollbarYRail, element);
  }

  if (!i.settings.suppressScrollX && i.containerWidth + i.settings.scrollXMarginOffset < i.contentWidth) {
    i.scrollbarXActive = true;
    i.railXWidth = i.containerWidth - i.railXMarginWidth;
    i.railXRatio = i.containerWidth / i.railXWidth;
    i.scrollbarXWidth = getThumbSize(i, h.toInt(i.railXWidth * i.containerWidth / i.contentWidth));
    i.scrollbarXLeft = h.toInt((i.negativeScrollAdjustment + element.scrollLeft) * (i.railXWidth - i.scrollbarXWidth) / (i.contentWidth - i.containerWidth));
  } else {
    i.scrollbarXActive = false;
  }

  if (!i.settings.suppressScrollY && i.containerHeight + i.settings.scrollYMarginOffset < i.contentHeight) {
    i.scrollbarYActive = true;
    i.railYHeight = i.containerHeight - i.railYMarginHeight;
    i.railYRatio = i.containerHeight / i.railYHeight;
    i.scrollbarYHeight = getThumbSize(i, h.toInt(i.railYHeight * i.containerHeight / i.contentHeight));
    i.scrollbarYTop = h.toInt(element.scrollTop * (i.railYHeight - i.scrollbarYHeight) / (i.contentHeight - i.containerHeight));
  } else {
    i.scrollbarYActive = false;
  }

  if (i.scrollbarXLeft >= i.railXWidth - i.scrollbarXWidth) {
    i.scrollbarXLeft = i.railXWidth - i.scrollbarXWidth;
  }
  if (i.scrollbarYTop >= i.railYHeight - i.scrollbarYHeight) {
    i.scrollbarYTop = i.railYHeight - i.scrollbarYHeight;
  }

  updateCss(element, i);

  if (i.scrollbarXActive) {
    cls.add(element, 'ps-active-x');
  } else {
    cls.remove(element, 'ps-active-x');
    i.scrollbarXWidth = 0;
    i.scrollbarXLeft = 0;
    updateScroll(element, 'left', 0);
  }
  if (i.scrollbarYActive) {
    cls.add(element, 'ps-active-y');
  } else {
    cls.remove(element, 'ps-active-y');
    i.scrollbarYHeight = 0;
    i.scrollbarYTop = 0;
    updateScroll(element, 'top', 0);
  }
};

},{"../lib/class":2,"../lib/dom":3,"../lib/helper":6,"./instances":18,"./update-scroll":20}],20:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var instances = require('./instances');

var upEvent = document.createEvent('Event')
  , downEvent = document.createEvent('Event')
  , leftEvent = document.createEvent('Event')
  , rightEvent = document.createEvent('Event')
  , yEvent = document.createEvent('Event')
  , xEvent = document.createEvent('Event')
  , xStartEvent = document.createEvent('Event')
  , xEndEvent = document.createEvent('Event')
  , yStartEvent = document.createEvent('Event')
  , yEndEvent = document.createEvent('Event')
  , lastTop
  , lastLeft;

upEvent.initEvent('ps-scroll-up', true, true);
downEvent.initEvent('ps-scroll-down', true, true);
leftEvent.initEvent('ps-scroll-left', true, true);
rightEvent.initEvent('ps-scroll-right', true, true);
yEvent.initEvent('ps-scroll-y', true, true);
xEvent.initEvent('ps-scroll-x', true, true);
xStartEvent.initEvent('ps-x-reach-start', true, true);
xEndEvent.initEvent('ps-x-reach-end', true, true);
yStartEvent.initEvent('ps-y-reach-start', true, true);
yEndEvent.initEvent('ps-y-reach-end', true, true);

module.exports = function (element, axis, value) {
  if (typeof element === 'undefined') {
    throw 'You must provide an element to the update-scroll function';
  }

  if (typeof axis === 'undefined') {
    throw 'You must provide an axis to the update-scroll function';
  }

  if (typeof value === 'undefined') {
    throw 'You must provide a value to the update-scroll function';
  }

  if (axis === 'top' && value <= 0) {
    element.scrollTop = 0;
    element.dispatchEvent(yStartEvent);
    return; // don't allow negative scroll
  }

  if (axis === 'left' && value <= 0) {
    element.scrollLeft = 0;
    element.dispatchEvent(xStartEvent);
    return; // don't allow negative scroll
  }

  var i = instances.get(element);

  if (axis === 'top' && value >= i.contentHeight - i.containerHeight) {
    element.scrollTop = i.contentHeight - i.containerHeight;
    element.dispatchEvent(yEndEvent);
    return; // don't allow scroll past container
  }

  if (axis === 'left' && value >= i.contentWidth - i.containerWidth) {
    element.scrollLeft = i.contentWidth - i.containerWidth;
    element.dispatchEvent(xEndEvent);
    return; // don't allow scroll past container
  }

  if (!lastTop) {
    lastTop = element.scrollTop;
  }

  if (!lastLeft) {
    lastLeft = element.scrollLeft;
  }

  if (axis === 'top' && value < lastTop) {
    element.dispatchEvent(upEvent);
  }

  if (axis === 'top' && value > lastTop) {
    element.dispatchEvent(downEvent);
  }

  if (axis === 'left' && value < lastLeft) {
    element.dispatchEvent(leftEvent);
  }

  if (axis === 'left' && value > lastLeft) {
    element.dispatchEvent(rightEvent);
  }

  if (axis === 'top') {
    element.scrollTop = lastTop = value;
    element.dispatchEvent(yEvent);
  }

  if (axis === 'left') {
    element.scrollLeft = lastLeft = value;
    element.dispatchEvent(xEvent);
  }

};

},{"./instances":18}],21:[function(require,module,exports){
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var d = require('../lib/dom')
  , h = require('../lib/helper')
  , instances = require('./instances')
  , updateGeometry = require('./update-geometry')
  , updateScroll = require('./update-scroll');

module.exports = function (element) {
  var i = instances.get(element);

  if (!i) {
    return;
  }

  // Recalcuate negative scrollLeft adjustment
  i.negativeScrollAdjustment = i.isNegativeScroll ? element.scrollWidth - element.clientWidth : 0;

  // Recalculate rail margins
  d.css(i.scrollbarXRail, 'display', 'block');
  d.css(i.scrollbarYRail, 'display', 'block');
  i.railXMarginWidth = h.toInt(d.css(i.scrollbarXRail, 'marginLeft')) + h.toInt(d.css(i.scrollbarXRail, 'marginRight'));
  i.railYMarginHeight = h.toInt(d.css(i.scrollbarYRail, 'marginTop')) + h.toInt(d.css(i.scrollbarYRail, 'marginBottom'));

  // Hide scrollbars not to affect scrollWidth and scrollHeight
  d.css(i.scrollbarXRail, 'display', 'none');
  d.css(i.scrollbarYRail, 'display', 'none');

  updateGeometry(element);

  // Update top/left scroll to trigger events
  updateScroll(element, 'top', element.scrollTop);
  updateScroll(element, 'left', element.scrollLeft);

  d.css(i.scrollbarXRail, 'display', '');
  d.css(i.scrollbarYRail, 'display', '');
};

},{"../lib/dom":3,"../lib/helper":6,"./instances":18,"./update-geometry":19,"./update-scroll":20}]},{},[1]);