kitten-components/dist/javascripts/kitten/components/carousel/carousel-inner.js

Front-end components library

'use strict';

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

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();

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; }; }();

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _radium = require('radium');

var _radium2 = _interopRequireDefault(_radium);

var _resizeObserverPolyfill = require('resize-observer-polyfill');

var _resizeObserverPolyfill2 = _interopRequireDefault(_resizeObserverPolyfill);

var _range = require('kitten/helpers/utils/range');

var _featureDetection = require('kitten/helpers/utils/feature-detection');

var _carouselPage = require('kitten/components/carousel/carousel-page');

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"); } }

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; }

if (typeof window !== 'undefined') {
  require('smoothscroll-polyfill').polyfill();
}

var supportScrollSnap = (0, _featureDetection.cssSupports)('scroll-snap-type: mandatory');
var supportScrollSmooth = (0, _featureDetection.cssSupports)('scroll-behavior: smooth');

// inspired by https://github.com/cferdinandi/scrollStop
var scrollStop = function scrollStop(callback) {
  // Make sure a valid callback was provided
  if (!callback) return;

  var isScrolling = void 0;
  var target = void 0;

  return function (event) {
    clearTimeout(isScrolling);

    target = event.target;

    isScrolling = setTimeout(function () {
      // Run the callback
      callback(target);
    },
    // wait more for scrollStop if browser support snap
    // because of the momentum on ios
    supportScrollSnap ? 132 : 66);
  };
};

var getClosest = function getClosest(counts, goal) {
  return counts.reduce(function (prev, curr) {
    return Math.abs(curr - goal) < Math.abs(prev - goal) ? curr : prev;
  });
};

var getDataForPage = function getDataForPage(data, indexPage, numColumns) {
  var startIndex = indexPage * numColumns;

  return data.slice(startIndex, startIndex + numColumns);
};

var getRangePageScrollLeft = function getRangePageScrollLeft(targetClientWidth, numPages, siblingPageVisible, itemMarginBetween) {
  var partSiblingItemExceedWidth = itemMarginBetween;
  var marginForSibling = siblingPageVisible ? (itemMarginBetween + partSiblingItemExceedWidth) * 2 : 0;
  var innerWidth = targetClientWidth - marginForSibling;

  return (0, _range.createRangeFromZeroTo)(numPages).map(function (numPage) {
    return numPage * (innerWidth + itemMarginBetween);
  });
};

var CarouselInnerBase = function (_React$Component) {
  _inherits(CarouselInnerBase, _React$Component);

  function CarouselInnerBase() {
    var _ref;

    var _temp, _this, _ret;

    _classCallCheck(this, CarouselInnerBase);

    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = CarouselInnerBase.__proto__ || Object.getPrototypeOf(CarouselInnerBase)).call.apply(_ref, [this].concat(args))), _this), _this.state = {
      isTouched: false
    }, _this.onResizeObserve = function (_ref2) {
      var _ref3 = _slicedToArray(_ref2, 1),
          entry = _ref3[0];

      var widthInner = entry.contentRect.width;
      _this.props.onResizeInner(widthInner);
    }, _this.handleInnerScroll = scrollStop(function (target) {
      if (_this.state.isTouched) return;

      var _this$props = _this.props,
          numPages = _this$props.numPages,
          siblingPageVisible = _this$props.siblingPageVisible,
          itemMarginBetween = _this$props.itemMarginBetween,
          indexPageVisible = _this$props.indexPageVisible,
          goToPage = _this$props.goToPage;
      var scrollLeft = target.scrollLeft,
          clientWidth = target.clientWidth;


      var rangePageScrollLeft = getRangePageScrollLeft(clientWidth, numPages, siblingPageVisible, itemMarginBetween);

      var closest = getClosest(rangePageScrollLeft, scrollLeft);
      var indexClosest = rangePageScrollLeft.indexOf(closest);

      if (indexClosest !== indexPageVisible) {
        goToPage(indexClosest);
      } else {
        // if the user doesn't scroll enough to change page
        // we need to scroll back to the fake snap page
        if (closest !== scrollLeft) {
          target.scrollTo({ top: 0, left: closest, behavior: 'smooth' });
        }
      }
    }), _this.scrollToPage = function (indexPageToScroll) {
      var _this$props2 = _this.props,
          numPages = _this$props2.numPages,
          siblingPageVisible = _this$props2.siblingPageVisible,
          itemMarginBetween = _this$props2.itemMarginBetween;


      var target = _this.carouselInner;
      var scrollLeft = target.scrollLeft,
          clientWidth = target.clientWidth;


      var rangePageScrollLeft = getRangePageScrollLeft(clientWidth, numPages, siblingPageVisible, itemMarginBetween);

      var closest = rangePageScrollLeft[indexPageToScroll];

      if (closest !== scrollLeft) {
        target.scrollTo({ top: 0, left: closest, behavior: 'smooth' });
      }
    }, _this.handleTouchStart = function () {
      return _this.setState({ isTouched: true });
    }, _this.handleTouchEnd = function () {
      return _this.setState({ isTouched: false });
    }, _this.handlePageClick = function (index) {
      return function (e) {
        if (index !== _this.props.indexPageVisible) {
          e.preventDefault();
          _this.scrollToPage(index);
          document.activeElement.blur();
        }
      };
    }, _temp), _possibleConstructorReturn(_this, _ret);
  }

  _createClass(CarouselInnerBase, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      this.observer = new _resizeObserverPolyfill2.default(this.onResizeObserve);
      this.observer.observe(this.carouselInner);
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      this.observer.disconnect();
    }
  }, {
    key: 'componentWillReceiveProps',
    value: function componentWillReceiveProps(nextProps) {
      if (nextProps.indexPageVisible !== this.props.indexPageVisible) {
        this.scrollToPage(nextProps.indexPageVisible);
      }
    }
  }, {
    key: 'render',
    value: function render() {
      var _this2 = this;

      var _props = this.props,
          data = _props.data,
          itemMinWidth = _props.itemMinWidth,
          renderItem = _props.renderItem,
          indexPageVisible = _props.indexPageVisible,
          numColumns = _props.numColumns,
          numPages = _props.numPages,
          itemMarginBetween = _props.itemMarginBetween,
          siblingPageVisible = _props.siblingPageVisible;


      var rangePage = (0, _range.createRangeFromZeroTo)(numPages);

      return _react2.default.createElement(
        'div',
        {
          ref: function ref(div) {
            _this2.carouselInner = div;
          },
          className: 'k-CarouselInner',
          style: [styles.carouselInner, {
            paddingLeft: siblingPageVisible ? itemMarginBetween * 2 : 0,
            paddingRight: siblingPageVisible ? itemMarginBetween * 2 : 0
          }],
          onScroll: this.handleInnerScroll,
          onTouchStart: this.handleTouchStart,
          onTouchEnd: this.handleTouchEnd
        },
        rangePage.map(function (index) {
          return _react2.default.createElement(
            'div',
            {
              key: index,
              style: [styles.carouselPageContainer, index !== indexPageVisible && styles.carouselPageContainerClickable, {
                marginLeft: index ? itemMarginBetween : 0
              }],
              onClick: _this2.handlePageClick(index)
            },
            _react2.default.createElement(_carouselPage.CarouselPage, {
              data: getDataForPage(data, index, numColumns),
              numColumns: numColumns,
              itemMinWidth: itemMinWidth,
              itemMarginBetween: itemMarginBetween,
              renderItem: renderItem
            })
          );
        }),
        siblingPageVisible && _react2.default.createElement('div', { style: { minWidth: itemMarginBetween * 2 } }),
        _react2.default.createElement(_radium.Style, {
          scopeSelector: '.k-CarouselInner::-webkit-scrollbar',
          rules: { display: 'none' }
        })
      );
    }
  }]);

  return CarouselInnerBase;
}(_react2.default.Component);

var styles = {
  carouselInner: {
    display: 'flex',
    flexDirect: 'row',
    overflowX: 'scroll',
    scrollBehavior: 'smooth',
    // hide scrollbar on IE and Edge
    MsOverflowStyle: 'none',
    // mandatory to combine scroll with this property on iOS
    WebkitOverflowScrolling: 'touch',
    // snap only for browser that support snap without prefixes
    scrollSnapType: supportScrollSnap ? 'mandatory' : 'none',
    // Fix bug IE11 ResizeObserver, to trigger a first resize
    minHeight: 1
  },
  carouselPageContainer: {
    width: '100%',
    flexShrink: 0,
    // snap only for browser that support snap without prefixes
    scrollSnapAlign: supportScrollSnap ? 'center' : 'none'
  },
  carouselPageContainerClickable: {
    cursor: 'pointer'
  }
};

var CarouselInner = exports.CarouselInner = (0, _radium2.default)(CarouselInnerBase);