+function ($) {
  'use strict';

  // POPOVER PUBLIC CLASS DEFINITION
  // ===============================

  var Popover = function (element, options) {
    this.init('popover', element, options);
  };

  if (!$.fn.tooltip) throw new Error('Popover requires tooltip.js');

  Popover.VERSION = '1.0.0';
  Popover.DEFAULTS = $.extend({}, $.fn.tooltip.Constructor.DEFAULTS, {
    placement: 'right',
    trigger: 'click',
    content: '',
    template: '<div class="popover" role="tooltip"><div class="arrow"></div><strong class="popover-title"></strong><div class="popover-content"></div></div>'
  });


  // NOTE: POPOVER EXTENDS tooltip.js
  // ================================

  Popover.prototype = $.extend({}, $.fn.tooltip.Constructor.prototype);

  Popover.prototype.constructor = Popover;

  Popover.prototype.getDefaults = function () {
    return Popover.DEFAULTS;
  };

  Popover.prototype.setContent = function () {
    var $tip = this.tip();
    var title = this.getTitle();
    var content = this.getContent();

    $tip.find('.popover-title')[this.options.html ? 'html' : 'text'](title);
    $tip.find('.popover-content').children().detach().end()[
      this.options.html ? (typeof content === 'string' ? 'html' : 'append') : 'text'
    ](content);

    $tip.removeClass('fade top bottom left right in');

    if (!$tip.find('.popover-title').html()) $tip.find('.popover-title').hide();
  };

  Popover.prototype.hasContent = function () {
    return this.getTitle() || this.getContent();
  };

  Popover.prototype.getContent = function () {
    var $e = this.$element;
    var o = this.options;

    return $e.attr('data-content') ||
      (typeof o.content === 'function' ? o.content.call($e[0]) : o.content);
  };

  Popover.prototype.arrow = function () {
    return (this.$arrow = this.$arrow || this.tip().find('.arrow'));
  };

  // POPOVER PLUGIN DEFINITION
  // =========================

  function Plugin(option) {
    return this.each(function () {
      var $this = $(this);
      var data = $this.data('bs.popover');
      var options = typeof option === 'object' && option;

      if (!data && /destroy|hide/.test(option)) return;
      if (!data) $this.data('bs.popover', (data = new Popover(this, options)));
      if (typeof option === 'string') data[option]();
    });
  }

  var old = $.fn.popover;

  $.fn.popover = Plugin;
  $.fn.popover.Constructor = Popover;

  // POPOVER NO CONFLICT
  // ===================

  $.fn.popover.noConflict = function () {
    $.fn.popover = old;
    return this;
  };

  // POPOVER DATA-API
  // ================

  $(document).on('click.bs.popover.data-api hover.bs.popover.data-api', '[data-toggle="popover"]', function (e) {
    var $this = $(this);
    if ($this.data('popover')) return;
    Plugin.call($this, $this.data());
  });

}(jQuery);