     @active_zen_area = @active_checkbox.parent().find('textarea')
     @active_zen_area.focus()
     window.location.hash = ZenMode.fullscreen_prefix + @active_checkbox.prop('id')
-  
+
   exitZenMode: =>
     if @active_zen_area isnt null
       Mousetrap.unpause()

class @ZenMode
  @fullscreen_prefix = 'fullscreen_'
  @ESC = 27

  constructor: ->
    @active_zen_area = null
    @active_checkbox = null

    $('body').on 'change', '.zennable input[type=checkbox]', (e) =>
      checkbox = e.currentTarget;
      if checkbox.checked
        Mousetrap.pause()
        @udpateActiveZenArea(checkbox)

    if checkbox
      @udpateActiveZenArea(checkbox)
    else
      @exitZenMode()
