/* eslint-disable */
/*!
 * pickadate.js v3.5.6, 2015/04/20
 * By Amsul, http://amsul.ca
 * Hosted on http://amsul.github.io/pickadate.js
 * Licensed under MIT
 */

(function (factory) {
  // Node.js/browserify.
  if (typeof exports === 'object') {
    require('./picker.css')
    module.exports = factory(jQuery)
  } else {
    this.Picker = factory(jQuery)
  }
}(function ($) {
  var $window = $(window)
  var $document = $(document)
  var $html = $(document.documentElement)
  var supportsTransitions = document.documentElement.style.transition != null

  /**
   * The picker constructor that creates a blank picker.
   */
  function PickerConstructor (ELEMENT, NAME, COMPONENT, OPTIONS) {
    // If there’s no element, return the picker constructor.
    if (!ELEMENT) return PickerConstructor

    var
      IS_DEFAULT_THEME = false

    // The state of the picker.

    var STATE = {
      id: ELEMENT.id || 'P' + Math.abs(~~(Math.random() * new Date()))
    }

    // Merge the defaults and options passed.

    var SETTINGS = COMPONENT ? $.extend(true, {}, COMPONENT.defaults, OPTIONS) : OPTIONS || {}

    // Merge the default classes with the settings classes.

    var CLASSES = $.extend({}, PickerConstructor.klasses(), SETTINGS.klass)

    // The element node wrapper into a jQuery object.

    var $ELEMENT = $(ELEMENT)

    // Pseudo picker constructor.

    var PickerInstance = function () {
      return this.start()
    }

    // The picker prototype.

    var P = PickerInstance.prototype = {

      constructor: PickerInstance,

      $node: $ELEMENT,

      /**
       * Initialize everything
       */
      start: function () {
        // If it’s already started, do nothing.
        if (STATE && STATE.start) return P

        // Update the picker states.
        STATE.methods = {}
        STATE.start = true
        STATE.open = false
        STATE.type = ELEMENT.type

        // Confirm focus state, convert into text input to remove UA stylings,
        // and set as readonly to prevent keyboard popup.
        ELEMENT.autofocus = ELEMENT == getActiveElement()
        ELEMENT.readOnly = !SETTINGS.editable
        ELEMENT.id = ELEMENT.id || STATE.id
        if (ELEMENT.type != 'text') {
          ELEMENT.type = 'text'
        }

        // Create a new picker component with the settings.
        P.component = new COMPONENT(P, SETTINGS)

        // Create the picker root and then prepare it.
        P.$root = $('<div class="' + CLASSES.picker + '" id="' + ELEMENT.id + '_root" />')
        prepareElementRoot()

        // Create the picker holder and then prepare it.
        P.$holder = $(createWrappedComponent()).appendTo(P.$root)
        prepareElementHolder()

        // If there’s a format for the hidden input element, create the element.
        if (SETTINGS.formatSubmit) {
          prepareElementHidden()
        }

        // Prepare the input element.
        prepareElement()

        // Insert the hidden input as specified in the settings.
        if (SETTINGS.containerHidden) {
          $(SETTINGS.containerHidden).append(P._hidden)
        } else {
          $ELEMENT.after(P._hidden)
        }

        // Insert the root as specified in the settings.
        if (SETTINGS.container) {
          $(SETTINGS.container).append(P.$root)
        } else {
          $ELEMENT.after(P.$root)
        }

        // Bind the default component and settings events.
        P.on({
          start: P.component.onStart,
          render: P.component.onRender,
          stop: P.component.onStop,
          open: P.component.onOpen,
          close: P.component.onClose,
          set: P.component.onSet
        }).on({
          start: SETTINGS.onStart,
          render: SETTINGS.onRender,
          stop: SETTINGS.onStop,
          open: SETTINGS.onOpen,
          close: SETTINGS.onClose,
          set: SETTINGS.onSet
        })

        // Once we’re all set, check the theme in use.
        IS_DEFAULT_THEME = isUsingDefaultTheme(P.$holder[0])

        // If the element has autofocus, open the picker.
        if (ELEMENT.autofocus) {
          P.open()
        }

        // Trigger queued the “start” and “render” events.
        return P.trigger('start').trigger('render')
      }, // start

      /**
       * Render a new picker
       */
      render: function (entireComponent) {
        // Insert a new component holder in the root or box.
        if (entireComponent) {
          P.$holder = $(createWrappedComponent())
          prepareElementHolder()
          P.$root.html(P.$holder)
        } else {
          P.$root.find('.' + CLASSES.box).html(P.component.nodes(STATE.open))
        }

        // Trigger the queued “render” events.
        return P.trigger('render')
      }, // render

      /**
       * Destroy everything
       */
      stop: function () {
        // If it’s already stopped, do nothing.
        if (!STATE.start) return P

        // Then close the picker.
        P.close()

        // Remove the hidden field.
        if (P._hidden) {
          P._hidden.parentNode.removeChild(P._hidden)
        }

        // Remove the root.
        P.$root.remove()

        // Remove the input class, remove the stored data, and unbind
        // the events (after a tick for IE - see `P.close`).
        $ELEMENT.removeClass(CLASSES.input).removeData(NAME)
        setTimeout(function () {
          $ELEMENT.off('.' + STATE.id)
        }, 0)

        // Restore the element state
        ELEMENT.type = STATE.type
        ELEMENT.readOnly = false

        // Trigger the queued “stop” events.
        P.trigger('stop')

        // Reset the picker states.
        STATE.methods = {}
        STATE.start = false

        return P
      }, // stop

      /**
       * Open up the picker
       */
      open: function (dontGiveFocus) {
        // If it’s already open, do nothing.
        if (STATE.open) return P

        // Add the “active” class.
        $ELEMENT.addClass(CLASSES.active)
        aria(ELEMENT, 'expanded', true)

        // * A Firefox bug, when `html` has `overflow:hidden`, results in
        //   killing transitions :(. So add the “opened” state on the next tick.
        //   Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=625289
        setTimeout(function () {
          // Add the “opened” class to the picker root.
          P.$root.addClass(CLASSES.opened)
          aria(P.$root[0], 'hidden', false)
        }, 0)

        // If we have to give focus, bind the element and doc events.
        if (dontGiveFocus !== false) {
          // Set it as open.
          STATE.open = true

          // Prevent the page from scrolling.
          if (IS_DEFAULT_THEME) {
            $html
              .css('overflow', 'hidden')
              .css('padding-right', '+=' + getScrollbarWidth())
          }

          // Pass focus to the root element’s jQuery object.
          focusPickerOnceOpened()

          // Bind the document events.
          $document.on('click.' + STATE.id + ' focusin.' + STATE.id, function (event) {
            var target = event.target

            // If the target of the event is not the element, close the picker picker.
            // * Don’t worry about clicks or focusins on the root because those don’t bubble up.
            //   Also, for Firefox, a click on an `option` element bubbles up directly
            //   to the doc. So make sure the target wasn't the doc.
            // * In Firefox stopPropagation() doesn’t prevent right-click events from bubbling,
            //   which causes the picker to unexpectedly close when right-clicking it. So make
            //   sure the event wasn’t a right-click.
            if (target != ELEMENT && target != document && event.which != 3) {
              // If the target was the holder that covers the screen,
              // keep the element focused to maintain tabindex.
              P.close(target === P.$holder[0])
            }
          }).on('keydown.' + STATE.id, function (event) {
            var
              // Get the keycode.
              keycode = event.keyCode

            // Translate that to a selection change.

            var keycodeToMove = P.component.key[keycode]

            // Grab the target.

            var target = event.target

            // On escape, close the picker and give focus.
            if (keycode == 27) {
              P.close(true)
            }

            // Check if there is a key movement or “enter” keypress on the element.
            else if (target == P.$holder[0] && (keycodeToMove || keycode == 13)) {
              // Prevent the default action to stop page movement.
              event.preventDefault()

              // Trigger the key movement action.
              if (keycodeToMove) {
                PickerConstructor._.trigger(P.component.key.go, P, [PickerConstructor._.trigger(keycodeToMove)])
              }

              // On “enter”, if the highlighted item isn’t disabled, set the value and close.
              else if (!P.$root.find('.' + CLASSES.highlighted).hasClass(CLASSES.disabled)) {
                P.set('select', P.component.item.highlight)
                if (SETTINGS.closeOnSelect) {
                  P.close(true)
                }
              }
            }

            // If the target is within the root and “enter” is pressed,
            // prevent the default action and trigger a click on the target instead.
            else if ($.contains(P.$root[0], target) && keycode == 13) {
              event.preventDefault()
              target.click()
            }
          })
        }

        // Trigger the queued “open” events.
        return P.trigger('open')
      }, // open

      /**
       * Close the picker
       */
      close: function (giveFocus) {
        // If we need to give focus, do it before changing states.
        if (giveFocus) {
          if (SETTINGS.editable) {
            ELEMENT.focus()
          } else {
            // ....ah yes! It would’ve been incomplete without a crazy workaround for IE :|
            // The focus is triggered *after* the close has completed - causing it
            // to open again. So unbind and rebind the event at the next tick.
            P.$holder.off('focus.toOpen').focus()
            setTimeout(function () {
              P.$holder.on('focus.toOpen', handleFocusToOpenEvent)
            }, 0)
          }
        }

        // Remove the “active” class.
        $ELEMENT.removeClass(CLASSES.active)
        aria(ELEMENT, 'expanded', false)

        // * A Firefox bug, when `html` has `overflow:hidden`, results in
        //   killing transitions :(. So remove the “opened” state on the next tick.
        //   Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=625289
        setTimeout(function () {
          // Remove the “opened” and “focused” class from the picker root.
          P.$root.removeClass(CLASSES.opened + ' ' + CLASSES.focused)
          aria(P.$root[0], 'hidden', true)
        }, 0)

        // If it’s already closed, do nothing more.
        if (!STATE.open) return P

        // Set it as closed.
        STATE.open = false

        // Allow the page to scroll.
        if (IS_DEFAULT_THEME) {
          $html
            .css('overflow', '')
            .css('padding-right', '-=' + getScrollbarWidth())
        }

        // Unbind the document events.
        $document.off('.' + STATE.id)

        // Trigger the queued “close” events.
        return P.trigger('close')
      }, // close

      /**
       * Clear the values
       */
      clear: function (options) {
        return P.set('clear', null, options)
      }, // clear

      /**
       * Set something
       */
      set: function (thing, value, options) {
        var thingItem
        var thingValue

        var thingIsObject = $.isPlainObject(thing)

        var thingObject = thingIsObject ? thing : {}

        // Make sure we have usable options.
        options = thingIsObject && $.isPlainObject(value) ? value : options || {}

        if (thing) {
          // If the thing isn’t an object, make it one.
          if (!thingIsObject) {
            thingObject[thing] = value
          }

          // Go through the things of items to set.
          for (thingItem in thingObject) {
            // Grab the value of the thing.
            thingValue = thingObject[thingItem]

            // First, if the item exists and there’s a value, set it.
            if (thingItem in P.component.item) {
              if (thingValue === undefined) thingValue = null
              P.component.set(thingItem, thingValue, options)
            }

            // Then, check to update the element value and broadcast a change.
            if (thingItem == 'select' || thingItem == 'clear') {
              $ELEMENT
                .val(thingItem == 'clear' ? '' : P.get(thingItem, SETTINGS.format))
                .trigger('change')
            }
          }

          // Render a new picker.
          P.render()
        }

        // When the method isn’t muted, trigger queued “set” events and pass the `thingObject`.
        return options.muted ? P : P.trigger('set', thingObject)
      }, // set

      /**
       * Get something
       */
      get: function (thing, format) {
        // Make sure there’s something to get.
        thing = thing || 'value'

        // If a picker state exists, return that.
        if (STATE[thing] != null) {
          return STATE[thing]
        }

        // Return the submission value, if that.
        if (thing == 'valueSubmit') {
          if (P._hidden) {
            return P._hidden.value
          }
          thing = 'value'
        }

        // Return the value, if that.
        if (thing == 'value') {
          return ELEMENT.value
        }

        // Check if a component item exists, return that.
        if (thing in P.component.item) {
          if (typeof format === 'string') {
            var thingValue = P.component.get(thing)
            return thingValue
              ? PickerConstructor._.trigger(
                P.component.formats.toString,
                P.component,
                [format, thingValue]
              ) : ''
          }
          return P.component.get(thing)
        }
      }, // get

      /**
       * Bind events on the things.
       */
      on: function (thing, method, internal) {
        var thingName
        var thingMethod

        var thingIsObject = $.isPlainObject(thing)

        var thingObject = thingIsObject ? thing : {}

        if (thing) {
          // If the thing isn’t an object, make it one.
          if (!thingIsObject) {
            thingObject[thing] = method
          }

          // Go through the things to bind to.
          for (thingName in thingObject) {
            // Grab the method of the thing.
            thingMethod = thingObject[thingName]

            // If it was an internal binding, prefix it.
            if (internal) {
              thingName = '_' + thingName
            }

            // Make sure the thing methods collection exists.
            STATE.methods[thingName] = STATE.methods[thingName] || []

            // Add the method to the relative method collection.
            STATE.methods[thingName].push(thingMethod)
          }
        }

        return P
      }, // on

      /**
       * Unbind events on the things.
       */
      off: function () {
        var i
        var thingName

        var names = arguments
        for (i = 0, namesCount = names.length; i < namesCount; i += 1) {
          thingName = names[i]
          if (thingName in STATE.methods) {
            delete STATE.methods[thingName]
          }
        }
        return P
      },

      /**
       * Fire off method events.
       */
      trigger: function (name, data) {
        var _trigger = function (name) {
          var methodList = STATE.methods[name]
          if (methodList) {
            methodList.map(function (method) {
              PickerConstructor._.trigger(method, P, [data])
            })
          }
        }
        _trigger('_' + name)
        _trigger(name)
        return P
      } // trigger
    } // PickerInstance.prototype

    /**
     * Wrap the picker holder components together.
     */
    function createWrappedComponent () {
      // Create a picker wrapper holder
      return PickerConstructor._.node('div',

        // Create a picker wrapper node
        PickerConstructor._.node('div',

          // Create a picker frame
          PickerConstructor._.node('div',

            // Create a picker box node
            PickerConstructor._.node('div',

              // Create the components nodes.
              P.component.nodes(STATE.open),

              // The picker box class
              CLASSES.box
            ),

            // Picker wrap class
            CLASSES.wrap
          ),

          // Picker frame class
          CLASSES.frame
        ),

        // Picker holder class
        CLASSES.holder,

        'tabindex="-1"'
      ) // endreturn
    } // createWrappedComponent

    /**
     * Prepare the input element with all bindings.
     */
    function prepareElement () {
      $ELEMENT

      // Store the picker data by component name.
        .data(NAME, P)

        // Add the “input” class name.
        .addClass(CLASSES.input)

        // If there’s a `data-value`, update the value of the element.
        .val($ELEMENT.data('value')
          ? P.get('select', SETTINGS.format)
          : ELEMENT.value
        )

      // Only bind keydown events if the element isn’t editable.
      if (!SETTINGS.editable) {
        $ELEMENT

        // On focus/click, open the picker.
          .on('focus.' + STATE.id + ' click.' + STATE.id, function (event) {
            event.preventDefault()
            P.open()
          })

          // Handle keyboard event based on the picker being opened or not.
          .on('keydown.' + STATE.id, handleKeydownEvent)
      }

      // Update the aria attributes.
      aria(ELEMENT, {
        haspopup: true,
        expanded: false,
        readonly: false,
        owns: ELEMENT.id + '_root'
      })
    }

    /**
     * Prepare the root picker element with all bindings.
     */
    function prepareElementRoot () {
      aria(P.$root[0], 'hidden', true)
    }

    /**
     * Prepare the holder picker element with all bindings.
     */
    function prepareElementHolder () {
      P.$holder

        .on({

          // For iOS8.
          keydown: handleKeydownEvent,

          'focus.toOpen': handleFocusToOpenEvent,

          blur: function () {
            // Remove the “target” class.
            $ELEMENT.removeClass(CLASSES.target)
          },

          // When something within the holder is focused, stop from bubbling
          // to the doc and remove the “focused” state from the root.
          focusin: function (event) {
            P.$root.removeClass(CLASSES.focused)
            event.stopPropagation()
          },

          // When something within the holder is clicked, stop it
          // from bubbling to the doc.
          'mousedown click': function (event) {
            var target = event.target

            // Make sure the target isn’t the root holder so it can bubble up.
            if (target != P.$holder[0]) {
              event.stopPropagation()

              // * For mousedown events, cancel the default action in order to
              //   prevent cases where focus is shifted onto external elements
              //   when using things like jQuery mobile or MagnificPopup (ref: #249 & #120).
              //   Also, for Firefox, don’t prevent action on the `option` element.
              if (event.type == 'mousedown' && !$(target).is('input, select, textarea, button, option')) {
                event.preventDefault()

                // Re-focus onto the holder so that users can click away
                // from elements focused within the picker.
                P.$holder[0].focus()
              }
            }
          }

        })

        // If there’s a click on an actionable element, carry out the actions.
        .on('click', '[data-pick], [data-nav], [data-clear], [data-close]', function () {
          var $target = $(this)

          var targetData = $target.data()

          var targetDisabled = $target.hasClass(CLASSES.navDisabled) || $target.hasClass(CLASSES.disabled)

          // * For IE, non-focusable elements can be active elements as well
          //   (http://stackoverflow.com/a/2684561).

          var activeElement = getActiveElement()
          activeElement = activeElement && (activeElement.type || activeElement.href)

          // If it’s disabled or nothing inside is actively focused, re-focus the element.
          if (targetDisabled || activeElement && !$.contains(P.$root[0], activeElement)) {
            P.$holder[0].focus()
          }

          // If something is superficially changed, update the `highlight` based on the `nav`.
          if (!targetDisabled && targetData.nav) {
            P.set('highlight', P.component.item.highlight, {nav: targetData.nav})
          }

          // If something is picked, set `select` then close with focus.
          else if (!targetDisabled && 'pick' in targetData) {
            P.set('select', targetData.pick)
            if (SETTINGS.closeOnSelect) {
              P.close(true)
            }
          }

          // If a “clear” button is pressed, empty the values and close with focus.
          else if (targetData.clear) {
            P.clear()
            if (SETTINGS.closeOnClear) {
              P.close(true)
            }
          } else if (targetData.close) {
            P.close(true)
          }
        }) // P.$holder
    }

    /**
     * Prepare the hidden input element along with all bindings.
     */
    function prepareElementHidden () {
      var name

      if (SETTINGS.hiddenName === true) {
        name = ELEMENT.name
        ELEMENT.name = ''
      } else {
        name = [
          typeof SETTINGS.hiddenPrefix === 'string' ? SETTINGS.hiddenPrefix : '',
          typeof SETTINGS.hiddenSuffix === 'string' ? SETTINGS.hiddenSuffix : '_submit'
        ]
        name = name[0] + ELEMENT.name + name[1]
      }

      P._hidden = $(
        '<input ' +
        'type=hidden ' +

        // Create the name using the original input’s with a prefix and suffix.
        'name="' + name + '"' +

        // If the element has a value, set the hidden value as well.
        (
          $ELEMENT.data('value') || ELEMENT.value
            ? ' value="' + P.get('select', SETTINGS.formatSubmit) + '"'
            : ''
        ) +
        '>'
      )[0]

      $ELEMENT

      // If the value changes, update the hidden input with the correct format.
        .on('change.' + STATE.id, function () {
          P._hidden.value = ELEMENT.value
            ? P.get('select', SETTINGS.formatSubmit)
            : ''
        })
    }

    // Wait for transitions to end before focusing the holder. Otherwise, while
    // using the `container` option, the view jumps to the container.
    function focusPickerOnceOpened () {
      if (IS_DEFAULT_THEME && supportsTransitions) {
        P.$holder.find('.' + CLASSES.frame).one('transitionend', function () {
          P.$holder[0].focus()
        })
      } else {
        P.$holder[0].focus()
      }
    }

    function handleFocusToOpenEvent (event) {
      // Stop the event from propagating to the doc.
      event.stopPropagation()

      // Add the “target” class.
      $ELEMENT.addClass(CLASSES.target)

      // Add the “focused” class to the root.
      P.$root.addClass(CLASSES.focused)

      // And then finally open the picker.
      P.open()
    }

    // For iOS8.
    function handleKeydownEvent (event) {
      var keycode = event.keyCode

      // Check if one of the delete keys was pressed.

      var isKeycodeDelete = /^(8|46)$/.test(keycode)

      // For some reason IE clears the input value on “escape”.
      if (keycode == 27) {
        P.close(true)
        return false
      }

      // Check if `space` or `delete` was pressed or the picker is closed with a key movement.
      if (keycode == 32 || isKeycodeDelete || !STATE.open && P.component.key[keycode]) {
        // Prevent it from moving the page and bubbling to doc.
        event.preventDefault()
        event.stopPropagation()

        // If `delete` was pressed, clear the values and close the picker.
        // Otherwise open the picker.
        if (isKeycodeDelete) { P.clear().close() } else { P.open() }
      }
    }

    // Return a new picker instance.
    return new PickerInstance()
  } // PickerConstructor

  /**
   * The default classes and prefix to use for the HTML classes.
   */
  PickerConstructor.klasses = function (prefix) {
    prefix = prefix || 'picker'
    return {

      picker: prefix,
      opened: prefix + '--opened',
      focused: prefix + '--focused',

      input: prefix + '__input',
      active: prefix + '__input--active',
      target: prefix + '__input--target',

      holder: prefix + '__holder',

      frame: prefix + '__frame',
      wrap: prefix + '__wrap',

      box: prefix + '__box'
    }
  } // PickerConstructor.klasses

  /**
   * Check if the default theme is being used.
   */
  function isUsingDefaultTheme (element) {
    var theme

    var prop = 'position'

    // For IE.
    if (element.currentStyle) {
      theme = element.currentStyle[prop]
    }

    // For normal browsers.
    else if (window.getComputedStyle) {
      theme = getComputedStyle(element)[prop]
    }

    return theme == 'fixed'
  }

  /**
   * Get the width of the browser’s scrollbar.
   * Taken from: https://github.com/VodkaBears/Remodal/blob/master/src/jquery.remodal.js
   */
  function getScrollbarWidth () {
    if ($html.height() <= $window.height()) {
      return 0
    }

    var $outer = $('<div style="visibility:hidden;width:100px" />')
      .appendTo('body')

    // Get the width without scrollbars.
    var widthWithoutScroll = $outer[0].offsetWidth

    // Force adding scrollbars.
    $outer.css('overflow', 'scroll')

    // Add the inner div.
    var $inner = $('<div style="width:100%" />').appendTo($outer)

    // Get the width with scrollbars.
    var widthWithScroll = $inner[0].offsetWidth

    // Remove the divs.
    $outer.remove()

    // Return the difference between the widths.
    return widthWithoutScroll - widthWithScroll
  }

  /**
   * PickerConstructor helper methods.
   */
  PickerConstructor._ = {

    /**
     * Create a group of nodes. Expects:
     * `
     {
            min:    {Integer},
            max:    {Integer},
            i:      {Integer},
            node:   {String},
            item:   {Function}
        }
     * `
     */
    group: function (groupObject) {
      var
        // Scope for the looped object
        loopObjectScope

      // Create the nodes list

      var nodesList = ''

      // The counter starts from the `min`

      var counter = PickerConstructor._.trigger(groupObject.min, groupObject)

      // Loop from the `min` to `max`, incrementing by `i`
      for (; counter <= PickerConstructor._.trigger(groupObject.max, groupObject, [counter]); counter += groupObject.i) {
        // Trigger the `item` function within scope of the object
        loopObjectScope = PickerConstructor._.trigger(groupObject.item, groupObject, [counter])

        // Splice the subgroup and create nodes out of the sub nodes
        nodesList += PickerConstructor._.node(
          groupObject.node,
          loopObjectScope[0], // the node
          loopObjectScope[1], // the classes
          loopObjectScope[2] // the attributes
        )
      }

      // Return the list of nodes
      return nodesList
    }, // group

    /**
     * Create a dom node string
     */
    node: function (wrapper, item, klass, attribute) {
      // If the item is false-y, just return an empty string
      if (!item) return ''

      // If the item is an array, do a join
      item = $.isArray(item) ? item.join('') : item

      // Check for the class
      klass = klass ? ' class="' + klass + '"' : ''

      // Check for any attributes
      attribute = attribute ? ' ' + attribute : ''

      // Return the wrapped item
      return '<' + wrapper + klass + attribute + '>' + item + '</' + wrapper + '>'
    }, // node

    /**
     * Lead numbers below 10 with a zero.
     */
    lead: function (number) {
      return (number < 10 ? '0' : '') + number
    },

    /**
     * Trigger a function otherwise return the value.
     */
    trigger: function (callback, scope, args) {
      return typeof callback === 'function' ? callback.apply(scope, args || []) : callback
    },

    /**
     * If the second character is a digit, length is 2 otherwise 1.
     */
    digits: function (string) {
      return (/\d/).test(string[1]) ? 2 : 1
    },

    /**
     * Tell if something is a date object.
     */
    isDate: function (value) {
      return {}.toString.call(value).indexOf('Date') > -1 && this.isInteger(value.getDate())
    },

    /**
     * Tell if something is an integer.
     */
    isInteger: function (value) {
      return {}.toString.call(value).indexOf('Number') > -1 && value % 1 === 0
    },

    /**
     * Create ARIA attribute strings.
     */
    ariaAttr: ariaAttr
  } // PickerConstructor._

  /**
   * Extend the picker with a component and defaults.
   */
  PickerConstructor.extend = function (name, Component) {
    // Extend jQuery.
    $.fn[name] = function (options, action) {
      // Grab the component data.
      var componentData = this.data(name)

      // If the picker is requested, return the data object.
      if (options == 'picker') {
        return componentData
      }

      // If the component data exists and `options` is a string, carry out the action.
      if (componentData && typeof options === 'string') {
        return PickerConstructor._.trigger(componentData[options], componentData, [action])
      }

      // Otherwise go through each matched element and if the component
      // doesn’t exist, create a new picker using `this` element
      // and merging the defaults and options with a deep copy.
      return this.each(function () {
        var $this = $(this)
        if (!$this.data(name)) {
          new PickerConstructor(this, name, Component, options)
        }
      })
    }

    // Set the defaults.
    $.fn[name].defaults = Component.defaults
  } // PickerConstructor.extend

  function aria (element, attribute, value) {
    if ($.isPlainObject(attribute)) {
      for (var key in attribute) {
        ariaSet(element, key, attribute[key])
      }
    } else {
      ariaSet(element, attribute, value)
    }
  }

  function ariaSet (element, attribute, value) {
    element.setAttribute(
      (attribute == 'role' ? '' : 'aria-') + attribute,
      value
    )
  }

  function ariaAttr (attribute, data) {
    if (!$.isPlainObject(attribute)) {
      attribute = {attribute: data}
    }
    data = ''
    for (var key in attribute) {
      var attr = (key == 'role' ? '' : 'aria-') + key

      var attrVal = attribute[key]
      data += attrVal == null ? '' : attr + '="' + attribute[key] + '"'
    }
    return data
  }

  // IE8 bug throws an error for activeElements within iframes.
  function getActiveElement () {
    try {
      return document.activeElement
    } catch (err) { }
  }

  // Expose the picker constructor.
  return PickerConstructor
}))
