/*!
  Waypoints Sticky Element Shortcut - 4.0.0
  Copyright © 2011-2015 Caleb Troughton
  Licensed under the MIT license.
  https://github.com/imakewebthings/waypoints/blog/master/licenses.txt
  */
  (function() {
    'use strict'
  
    var $ = window.jQuery
    var Waypoint = window.Waypoint
  
    /* http://imakewebthings.com/waypoints/shortcuts/sticky-elements */
    function Sticky(options) {
      this.options = $.extend({}, Waypoint.defaults, Sticky.defaults, options)
      this.element = this.options.element
      this.$element = $(this.element)
      this.createWrapper()
      this.createWaypoint()
    }
  
    /* Private */
    Sticky.prototype.createWaypoint = function() {
      var originalHandler = this.options.handler
  
      this.waypoint = new Waypoint($.extend({}, this.options, {
        element: this.wrapper,
        handler: $.proxy(function(direction) {
          var shouldBeStuck = this.options.direction.indexOf(direction) > -1
          var wrapperHeight = shouldBeStuck ? this.$element.outerHeight(true) : ''
  
          this.$wrapper.height(wrapperHeight)
          this.$element.toggleClass(this.options.stuckClass, shouldBeStuck)
  
          if (originalHandler) {
            originalHandler.call(this, direction)
          }
        }, this)
      }))
    }
  
    /* Private */
    Sticky.prototype.createWrapper = function() {
      if (this.options.wrapper) {
        this.$element.wrap(this.options.wrapper)
      }
      this.$wrapper = this.$element.parent()
      this.wrapper = this.$wrapper[0]
    }
  
    /* Public */
    Sticky.prototype.destroy = function() {
      if (this.$element.parent()[0] === this.wrapper) {
        this.waypoint.destroy()
        this.$element.removeClass(this.options.stuckClass)
        if (this.options.wrapper) {
          this.$element.unwrap()
        }
      }
    }
  
    Sticky.defaults = {
      wrapper: '<div class="sticky-wrapper" />',
      stuckClass: 'stuck',
      direction: 'down right'
    }
  
    Waypoint.Sticky = Sticky
  }())
  ;