carbon-components/es/components/lightbox/lightbox.js

Carbon Components is a component library for IBM Cloud

function _typeof(obj) {
  if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
    _typeof = function _typeof(obj) {
      return typeof obj;
    };
  } else {
    _typeof = function _typeof(obj) {
      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    };
  }

  return _typeof(obj);
}

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

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  return Constructor;
}

function _possibleConstructorReturn(self, call) {
  if (call && (_typeof(call) === "object" || typeof call === "function")) {
    return call;
  }

  return _assertThisInitialized(self);
}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

function _getPrototypeOf(o) {
  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
    return o.__proto__ || Object.getPrototypeOf(o);
  };
  return _getPrototypeOf(o);
}

function _inherits(subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function");
  }

  subClass.prototype = Object.create(superClass && superClass.prototype, {
    constructor: {
      value: subClass,
      writable: true,
      configurable: true
    }
  });
  if (superClass) _setPrototypeOf(subClass, superClass);
}

function _setPrototypeOf(o, p) {
  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
    o.__proto__ = p;
    return o;
  };

  return _setPrototypeOf(o, p);
}
/**
 * Copyright IBM Corp. 2016, 2018
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */


import warning from 'warning';
import { breakingChangesX } from '../../globals/js/feature-flags';
import settings from '../../globals/js/settings';
import mixin from '../../globals/js/misc/mixin';
import createComponent from '../../globals/js/mixins/create-component';
import initComponentBySearch from '../../globals/js/mixins/init-component-by-search';
import removedComponent from '../removed-component';
var didWarnAboutDeprecation;

var toArray = function toArray(arrayLike) {
  return Array.prototype.slice.call(arrayLike);
};

var Lightbox =
/*#__PURE__*/
function (_mixin) {
  _inherits(Lightbox, _mixin);

  function Lightbox(element, options) {
    var _this;

    _classCallCheck(this, Lightbox);

    _this = _possibleConstructorReturn(this, _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 = toArray(_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);
    };

    if (process.env.NODE_ENV !== "production") {
      process.env.NODE_ENV !== "production" ? warning(didWarnAboutDeprecation, 'The `Lightbox` component in `carbon-components` has been deprecated. It will be removed in the next major release.') : void 0;
      didWarnAboutDeprecation = true;
    }

    _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 = settings.prefix;
      return {
        selectorInit: '[data-lightbox]',
        selectorScrollRight: '[data-scroll-right]',
        selectorScrollLeft: '[data-scroll-left]',
        selectorLightboxItem: ".".concat(prefix, "--lightbox__item"),
        classActiveItem: "".concat(prefix, "--lightbox__item--shown")
      };
    }
    /**
     * The map associating DOM element and accordion UI instance.
     * @type {WeakMap}
     */

  }]);

  Lightbox.components = new WeakMap();
  return Lightbox;
}(mixin(createComponent, initComponentBySearch));

export default !breakingChangesX ? Lightbox : removedComponent('Lightbox');