carbon-components/umd/components/lightbox/lightbox.js

Carbon Components is a component library for IBM Cloud

(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(['exports', '../../globals/js/settings', '../../globals/js/misc/mixin', '../../globals/js/mixins/create-component', '../../globals/js/mixins/init-component-by-search'], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require('../../globals/js/settings'), require('../../globals/js/misc/mixin'), require('../../globals/js/mixins/create-component'), require('../../globals/js/mixins/init-component-by-search'));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.settings, global.mixin, global.createComponent, global.initComponentBySearch);
    global.lightbox = mod.exports;
  }
})(this, function (exports, _settings, _mixin2, _createComponent, _initComponentBySearch) {
  'use strict';

  Object.defineProperty(exports, "__esModule", {
    value: true
  });

  var _settings2 = _interopRequireDefault(_settings);

  var _mixin3 = _interopRequireDefault(_mixin2);

  var _createComponent2 = _interopRequireDefault(_createComponent);

  var _initComponentBySearch2 = _interopRequireDefault(_initComponentBySearch);

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

  function _toConsumableArray(arr) {
    if (Array.isArray(arr)) {
      for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) {
        arr2[i] = arr[i];
      }

      return arr2;
    } else {
      return Array.from(arr);
    }
  }

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

  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 _possibleConstructorReturn(self, call) {
    if (!self) {
      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
    }

    return call && (typeof call === "object" || typeof call === "function") ? call : self;
  }

  function _inherits(subClass, superClass) {
    if (typeof superClass !== "function" && superClass !== null) {
      throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
    }

    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
    if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
  }

  var Lightbox = function (_mixin) {
    _inherits(Lightbox, _mixin);

    function Lightbox(element, options) {
      _classCallCheck(this, Lightbox);

      var _this = _possibleConstructorReturn(this, (Lightbox.__proto__ || Object.getPrototypeOf(Lightbox)).call(this, element, options));

      _this.showLightbox = function (evt) {
        if (!evt.detail.launchingElement.dataset.carouselItemIndex) {
          throw new Error('launchingElement must have carouselItemIndex data attribute to indicated what item to display');
        }
        _this.activeIndex = evt.detail.launchingElement.dataset.carouselItemIndex;
        _this.updateSlide();
      };

      _this.handleClick = function (evt) {
        if (evt.target.matches(_this.options.selectorScrollRight)) {
          if (_this.activeIndex < _this.totalSlides) {
            _this.activeIndex++;
            _this.updateSlide();
          }
        }

        if (evt.target.matches(_this.options.selectorScrollLeft)) {
          if (_this.activeIndex > 0) {
            _this.activeIndex--;
            _this.updateSlide();
          }
        }
      };

      _this.updateSlide = function () {
        var items = [].concat(_toConsumableArray(_this.element.querySelectorAll(_this.options.selectorLightboxItem)));
        if (_this.activeIndex < 0 || _this.activeIndex >= items.length) {
          throw new RangeError('carouselItemIndex data attribute must be in range of lightbox items length');
        }
        items.forEach(function (item) {
          return item.classList.remove(_this.options.classActiveItem);
        });
        items[_this.activeIndex].classList.add(_this.options.classActiveItem);
      };

      _this.activeIndex = _this.element.dataset.lightboxIndex;
      _this.totalSlides = _this.element.querySelectorAll(_this.options.selectorLightboxItem).length - 1;

      _this.updateSlide();

      _this.element.addEventListener('click', function (evt) {
        return _this.handleClick(evt);
      });
      _this.element.parentNode.addEventListener('modal-beingshown', function (evt) {
        return _this.showLightbox(evt);
      });
      return _this;
    }

    _createClass(Lightbox, null, [{
      key: 'options',
      get: function get() {
        var prefix = _settings2.default.prefix;

        return {
          selectorInit: '[data-lightbox]',
          selectorScrollRight: '[data-scroll-right]',
          selectorScrollLeft: '[data-scroll-left]',
          selectorLightboxItem: '.' + prefix + '--lightbox__item',
          classActiveItem: prefix + '--lightbox__item--shown'
        };
      }
    }]);

    return Lightbox;
  }((0, _mixin3.default)(_createComponent2.default, _initComponentBySearch2.default));

  Lightbox.components = new WeakMap();
  exports.default = Lightbox;
});