carousel.js

(function (global, factory) {
  if (typeof define === 'function' && define.amd) {
    define(['exports', 'module', './util'], factory);
  } else if (typeof exports !== 'undefined' && typeof module !== 'undefined') {
    factory(exports, module, require('./util'));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, mod, global.Util);
    global.carousel = mod.exports;
  }
})(this, function (exports, module, _util) {
  'use strict';

  var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }

  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

  var _Util = _interopRequireDefault(_util);

  /**
   * --------------------------------------------------------------------------
   * Bootstrap (v4.0.0-alpha.2): carousel.js
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   * --------------------------------------------------------------------------
   */

  var Carousel = (function ($) {

    /**
     * ------------------------------------------------------------------------
     * Constants
     * ------------------------------------------------------------------------
     */

    var NAME = 'carousel';
    var VERSION = '4.0.0-alpha.2';
    var DATA_KEY = 'bs.carousel';
    var EVENT_KEY = '.' + DATA_KEY;
    var DATA_API_KEY = '.data-api';
    var JQUERY_NO_CONFLICT = $.fn[NAME];
    var TRANSITION_DURATION = 600;

    var Default = {
      interval: 5000,
      keyboard: true,
      slide: false,
      pause: 'hover',
      wrap: true
    };

    var DefaultType = {
      interval: '(number|boolean)',
      keyboard: 'boolean',
      slide: '(boolean|string)',
      pause: '(string|boolean)',
      wrap: 'boolean'
    };

    var Direction = {
      NEXT: 'next',
      PREVIOUS: 'prev'
    };

    var Event = {
      SLIDE: 'slide' + EVENT_KEY,
      SLID: 'slid' + EVENT_KEY,
      KEYDOWN: 'keydown' + EVENT_KEY,
      MOUSEENTER: 'mouseenter' + EVENT_KEY,
      MOUSELEAVE: 'mouseleave' + EVENT_KEY,
      LOAD_DATA_API: 'load' + EVENT_KEY + DATA_API_KEY,
      CLICK_DATA_API: 'click' + EVENT_KEY + DATA_API_KEY
    };

    var ClassName = {
      CAROUSEL: 'carousel',
      ACTIVE: 'active',
      SLIDE: 'slide',
      RIGHT: 'right',
      LEFT: 'left',
      ITEM: 'carousel-item'
    };

    var Selector = {
      ACTIVE: '.active',
      ACTIVE_ITEM: '.active.carousel-item',
      ITEM: '.carousel-item',
      NEXT_PREV: '.next, .prev',
      INDICATORS: '.carousel-indicators',
      DATA_SLIDE: '[data-slide], [data-slide-to]',
      DATA_RIDE: '[data-ride="carousel"]'
    };

    /**
     * ------------------------------------------------------------------------
     * Class Definition
     * ------------------------------------------------------------------------
     */

    var Carousel = (function () {
      function Carousel(element, config) {
        _classCallCheck(this, Carousel);

        this._items = null;
        this._interval = null;
        this._activeElement = null;

        this._isPaused = false;
        this._isSliding = false;

        this._config = this._getConfig(config);
        this._element = $(element)[0];
        this._indicatorsElement = $(this._element).find(Selector.INDICATORS)[0];

        this._addEventListeners();
      }

      /**
       * ------------------------------------------------------------------------
       * Data Api implementation
       * ------------------------------------------------------------------------
       */

      // getters

      _createClass(Carousel, [{
        key: 'next',

        // public

        value: function next() {
          if (!this._isSliding) {
            this._slide(Direction.NEXT);
          }
        }
      }, {
        key: 'nextWhenVisible',
        value: function nextWhenVisible() {
          // Don't call next when the page isn't visible
          if (!document.hidden) {
            this.next();
          }
        }
      }, {
        key: 'prev',
        value: function prev() {
          if (!this._isSliding) {
            this._slide(Direction.PREVIOUS);
          }
        }
      }, {
        key: 'pause',
        value: function pause(event) {
          if (!event) {
            this._isPaused = true;
          }

          if ($(this._element).find(Selector.NEXT_PREV)[0] && _Util['default'].supportsTransitionEnd()) {
            _Util['default'].triggerTransitionEnd(this._element);
            this.cycle(true);
          }

          clearInterval(this._interval);
          this._interval = null;
        }
      }, {
        key: 'cycle',
        value: function cycle(event) {
          if (!event) {
            this._isPaused = false;
          }

          if (this._interval) {
            clearInterval(this._interval);
            this._interval = null;
          }

          if (this._config.interval && !this._isPaused) {
            this._interval = setInterval($.proxy(document.visibilityState ? this.nextWhenVisible : this.next, this), this._config.interval);
          }
        }
      }, {
        key: 'to',
        value: function to(index) {
          var _this = this;

          this._activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0];

          var activeIndex = this._getItemIndex(this._activeElement);

          if (index > this._items.length - 1 || index < 0) {
            return;
          }

          if (this._isSliding) {
            $(this._element).one(Event.SLID, function () {
              return _this.to(index);
            });
            return;
          }

          if (activeIndex === index) {
            this.pause();
            this.cycle();
            return;
          }

          var direction = index > activeIndex ? Direction.NEXT : Direction.PREVIOUS;

          this._slide(direction, this._items[index]);
        }
      }, {
        key: 'dispose',
        value: function dispose() {
          $(this._element).off(EVENT_KEY);
          $.removeData(this._element, DATA_KEY);

          this._items = null;
          this._config = null;
          this._element = null;
          this._interval = null;
          this._isPaused = null;
          this._isSliding = null;
          this._activeElement = null;
          this._indicatorsElement = null;
        }

        // private

      }, {
        key: '_getConfig',
        value: function _getConfig(config) {
          config = $.extend({}, Default, config);
          _Util['default'].typeCheckConfig(NAME, config, DefaultType);
          return config;
        }
      }, {
        key: '_addEventListeners',
        value: function _addEventListeners() {
          if (this._config.keyboard) {
            $(this._element).on(Event.KEYDOWN, $.proxy(this._keydown, this));
          }

          if (this._config.pause === 'hover' && !('ontouchstart' in document.documentElement)) {
            $(this._element).on(Event.MOUSEENTER, $.proxy(this.pause, this)).on(Event.MOUSELEAVE, $.proxy(this.cycle, this));
          }
        }
      }, {
        key: '_keydown',
        value: function _keydown(event) {
          event.preventDefault();

          if (/input|textarea/i.test(event.target.tagName)) {
            return;
          }

          switch (event.which) {
            case 37:
              this.prev();break;
            case 39:
              this.next();break;
            default:
              return;
          }
        }
      }, {
        key: '_getItemIndex',
        value: function _getItemIndex(element) {
          this._items = $.makeArray($(element).parent().find(Selector.ITEM));
          return this._items.indexOf(element);
        }
      }, {
        key: '_getItemByDirection',
        value: function _getItemByDirection(direction, activeElement) {
          var isNextDirection = direction === Direction.NEXT;
          var isPrevDirection = direction === Direction.PREVIOUS;
          var activeIndex = this._getItemIndex(activeElement);
          var lastItemIndex = this._items.length - 1;
          var isGoingToWrap = isPrevDirection && activeIndex === 0 || isNextDirection && activeIndex === lastItemIndex;

          if (isGoingToWrap && !this._config.wrap) {
            return activeElement;
          }

          var delta = direction === Direction.PREVIOUS ? -1 : 1;
          var itemIndex = (activeIndex + delta) % this._items.length;

          return itemIndex === -1 ? this._items[this._items.length - 1] : this._items[itemIndex];
        }
      }, {
        key: '_triggerSlideEvent',
        value: function _triggerSlideEvent(relatedTarget, directionalClassname) {
          var slideEvent = $.Event(Event.SLIDE, {
            relatedTarget: relatedTarget,
            direction: directionalClassname
          });

          $(this._element).trigger(slideEvent);

          return slideEvent;
        }
      }, {
        key: '_setActiveIndicatorElement',
        value: function _setActiveIndicatorElement(element) {
          if (this._indicatorsElement) {
            $(this._indicatorsElement).find(Selector.ACTIVE).removeClass(ClassName.ACTIVE);

            var nextIndicator = this._indicatorsElement.children[this._getItemIndex(element)];

            if (nextIndicator) {
              $(nextIndicator).addClass(ClassName.ACTIVE);
            }
          }
        }
      }, {
        key: '_slide',
        value: function _slide(direction, element) {
          var _this2 = this;

          var activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0];
          var nextElement = element || activeElement && this._getItemByDirection(direction, activeElement);

          var isCycling = Boolean(this._interval);

          var directionalClassName = direction === Direction.NEXT ? ClassName.LEFT : ClassName.RIGHT;

          if (nextElement && $(nextElement).hasClass(ClassName.ACTIVE)) {
            this._isSliding = false;
            return;
          }

          var slideEvent = this._triggerSlideEvent(nextElement, directionalClassName);
          if (slideEvent.isDefaultPrevented()) {
            return;
          }

          if (!activeElement || !nextElement) {
            // some weirdness is happening, so we bail
            return;
          }

          this._isSliding = true;

          if (isCycling) {
            this.pause();
          }

          this._setActiveIndicatorElement(nextElement);

          var slidEvent = $.Event(Event.SLID, {
            relatedTarget: nextElement,
            direction: directionalClassName
          });

          if (_Util['default'].supportsTransitionEnd() && $(this._element).hasClass(ClassName.SLIDE)) {

            $(nextElement).addClass(direction);

            _Util['default'].reflow(nextElement);

            $(activeElement).addClass(directionalClassName);
            $(nextElement).addClass(directionalClassName);

            $(activeElement).one(_Util['default'].TRANSITION_END, function () {
              $(nextElement).removeClass(directionalClassName).removeClass(direction);

              $(nextElement).addClass(ClassName.ACTIVE);

              $(activeElement).removeClass(ClassName.ACTIVE).removeClass(direction).removeClass(directionalClassName);

              _this2._isSliding = false;

              setTimeout(function () {
                return $(_this2._element).trigger(slidEvent);
              }, 0);
            }).emulateTransitionEnd(TRANSITION_DURATION);
          } else {
            $(activeElement).removeClass(ClassName.ACTIVE);
            $(nextElement).addClass(ClassName.ACTIVE);

            this._isSliding = false;
            $(this._element).trigger(slidEvent);
          }

          if (isCycling) {
            this.cycle();
          }
        }

        // static

      }], [{
        key: '_jQueryInterface',
        value: function _jQueryInterface(config) {
          return this.each(function () {
            var data = $(this).data(DATA_KEY);
            var _config = $.extend({}, Default, $(this).data());

            if (typeof config === 'object') {
              $.extend(_config, config);
            }

            var action = typeof config === 'string' ? config : _config.slide;

            if (!data) {
              data = new Carousel(this, _config);
              $(this).data(DATA_KEY, data);
            }

            if (typeof config === 'number') {
              data.to(config);
            } else if (typeof action === 'string') {
              if (data[action] === undefined) {
                throw new Error('No method named "' + action + '"');
              }
              data[action]();
            } else if (_config.interval) {
              data.pause();
              data.cycle();
            }
          });
        }
      }, {
        key: '_dataApiClickHandler',
        value: function _dataApiClickHandler(event) {
          var selector = _Util['default'].getSelectorFromElement(this);

          if (!selector) {
            return;
          }

          var target = $(selector)[0];

          if (!target || !$(target).hasClass(ClassName.CAROUSEL)) {
            return;
          }

          var config = $.extend({}, $(target).data(), $(this).data());
          var slideIndex = this.getAttribute('data-slide-to');

          if (slideIndex) {
            config.interval = false;
          }

          Carousel._jQueryInterface.call($(target), config);

          if (slideIndex) {
            $(target).data(DATA_KEY).to(slideIndex);
          }

          event.preventDefault();
        }
      }, {
        key: 'VERSION',
        get: function get() {
          return VERSION;
        }
      }, {
        key: 'Default',
        get: function get() {
          return Default;
        }
      }]);

      return Carousel;
    })();

    $(document).on(Event.CLICK_DATA_API, Selector.DATA_SLIDE, Carousel._dataApiClickHandler);

    $(window).on(Event.LOAD_DATA_API, function () {
      $(Selector.DATA_RIDE).each(function () {
        var $carousel = $(this);
        Carousel._jQueryInterface.call($carousel, $carousel.data());
      });
    });

    /**
     * ------------------------------------------------------------------------
     * jQuery
     * ------------------------------------------------------------------------
     */

    $.fn[NAME] = Carousel._jQueryInterface;
    $.fn[NAME].Constructor = Carousel;
    $.fn[NAME].noConflict = function () {
      $.fn[NAME] = JQUERY_NO_CONFLICT;
      return Carousel._jQueryInterface;
    };

    return Carousel;
  })(jQuery);

  module.exports = Carousel;
});