react-view-pager/lib/Track.js

View-Pager/Slider/Carousel powered by React Motion.

'use strict';

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

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

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

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 _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _reactDom = require('react-dom');

var _reactMotion = require('react-motion');

var _Pager = require('./Pager');

var _Pager2 = _interopRequireDefault(_Pager);

var _getIndex = require('./get-index');

var _getIndex2 = _interopRequireDefault(_getIndex);

var _specialAssign = require('./special-assign');

var _specialAssign2 = _interopRequireDefault(_specialAssign);

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

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

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; }

var noop = function noop() {
  return null;
};
var checkedProps = {
  tag: _propTypes2.default.any,
  currentView: _propTypes2.default.any,
  viewsToShow: _propTypes2.default.oneOfType([_propTypes2.default.number, _propTypes2.default.oneOf(['auto'])]),
  viewsToMove: _propTypes2.default.number,
  align: _propTypes2.default.number,
  contain: _propTypes2.default.bool,
  axis: _propTypes2.default.oneOf(['x', 'y']),
  animations: _propTypes2.default.array,
  infinite: _propTypes2.default.bool,
  instant: _propTypes2.default.bool,
  swipe: _propTypes2.default.oneOf([true, false, 'mouse', 'touch']),
  swipeThreshold: _propTypes2.default.number,
  flickTimeout: _propTypes2.default.number,
  // rightToLeft: PropTypes.bool,
  // lazyLoad: PropTypes.bool,
  springConfig: _propTypes2.default.objectOf(_propTypes2.default.number),
  onSwipeStart: _propTypes2.default.func,
  onSwipeMove: _propTypes2.default.func,
  onSwipeEnd: _propTypes2.default.func,
  onScroll: _propTypes2.default.func,
  onViewChange: _propTypes2.default.func,
  onRest: _propTypes2.default.func
};
var isNotEqual = function isNotEqual(current, next) {
  return current.viewsToShow !== next.viewsToShow || current.viewsToMove !== next.viewsToMove || current.align !== next.align || current.axis !== next.axis || current.animations !== next.animations || current.infinite !== next.infinite || current.swipe !== next.swipe || current.swipeThreshold !== next.swipeThreshold || current.flickTimeout !== next.flickTimeout;
};

// Track scroller is an intermediate component that allows us to provide the
// React Motion value to onScroll and lets any user of onScroll use setState

var TrackScroller = function (_Component) {
  _inherits(TrackScroller, _Component);

  function TrackScroller() {
    var _ref;

    var _temp, _this, _ret;

    _classCallCheck(this, TrackScroller);

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

    return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = TrackScroller.__proto__ || Object.getPrototypeOf(TrackScroller)).call.apply(_ref, [this].concat(args))), _this), _this.state = {
      x: 0,
      y: 0
    }, _temp), _possibleConstructorReturn(_this, _ret);
  }

  _createClass(TrackScroller, [{
    key: 'componentWillReceiveProps',
    value: function componentWillReceiveProps(_ref2) {
      var _this2 = this;

      var trackPosition = _ref2.trackPosition;
      var pager = this.context.pager;

      // update view styles with current position tween
      // this method can get called hundreds of times, let's make sure to optimize as much as we can

      pager.setViewStyles(trackPosition);

      // update onScroll callback, we use requestAnimationFrame to avoid bouncing
      // back from updates from onScroll while React Motion is trying to update it's own tree
      // https://github.com/chenglou/react-motion/issues/357#issuecomment-262393424
      if (this.props.trackPosition !== trackPosition) {
        requestAnimationFrame(function () {
          return _this2.props.onScroll(trackPosition / pager.getTrackSize(false) * -1, trackPosition);
        });
      }
    }
  }, {
    key: '_renderViews',
    value: function _renderViews() {
      // we need Children map in order for the infinite option to work
      // not actually sure why this is the case
      return _react.Children.map(this.props.children, function (child) {
        return child;
      });
    }
  }, {
    key: 'render',
    value: function render() {
      var pager = this.context.pager;

      var _props = this.props,
          tag = _props.tag,
          trackPosition = _props.trackPosition,
          children = _props.children,
          restProps = _objectWithoutProperties(_props, ['tag', 'trackPosition', 'children']);

      var style = _extends({}, restProps.style);

      if (pager.track) {
        style = _extends({}, style, pager.track.getStyles(trackPosition));
      }

      return (0, _react.createElement)(tag, _extends({}, restProps, {
        style: style
      }), this._renderViews());
    }
  }]);

  return TrackScroller;
}(_react.Component);

TrackScroller.propTypes = checkedProps;
TrackScroller.contextTypes = {
  pager: _propTypes2.default.instanceOf(_Pager2.default)
};

var Track = function (_Component2) {
  _inherits(Track, _Component2);

  function Track() {
    var _ref3;

    var _temp2, _this3, _ret2;

    _classCallCheck(this, Track);

    for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
      args[_key2] = arguments[_key2];
    }

    return _ret2 = (_temp2 = (_this3 = _possibleConstructorReturn(this, (_ref3 = Track.__proto__ || Object.getPrototypeOf(Track)).call.apply(_ref3, [this].concat(args))), _this3), _this3.state = {
      instant: false
    }, _this3._currentTween = 0, _this3._hydrate = false, _this3._handleOnRest = function () {
      if (_this3.props.infinite && !_this3.state.instant) {
        // reset back to a normal index
        _this3.context.pager.resetViewIndex();

        // set instant flag so we can prime track for next move
        _this3._setValueInstantly(true, true);
      }

      _this3.props.onRest();
    }, _temp2), _possibleConstructorReturn(_this3, _ret2);
  }

  _createClass(Track, [{
    key: 'componentWillMount',
    value: function componentWillMount() {
      this.context.pager.setOptions(this.props);
    }
  }, {
    key: 'componentDidMount',
    value: function componentDidMount() {
      var _this4 = this;

      var pager = this.context.pager;

      // add track to pager

      pager.addTrack((0, _reactDom.findDOMNode)(this));

      // set initial view index and listen for any incoming view index changes
      this.scrollTo((0, _getIndex2.default)(this.props.currentView, this.props.children));

      // set values instantly on respective events
      pager.on('hydrated', function () {
        return _this4._setValueInstantly(true, true);
      });
      pager.on('swipeMove', function () {
        return _this4._setValueInstantly(true);
      });
      pager.on('swipeEnd', function () {
        return _this4._setValueInstantly(false);
      });

      // prop callbacks
      pager.on('swipeStart', this.props.onSwipeStart);
      pager.on('swipeMove', this.props.onSwipeMove);
      pager.on('swipeEnd', this.props.onSwipeEnd);
      pager.on('viewChange', this.props.onViewChange);
    }
  }, {
    key: 'componentWillReceiveProps',
    value: function componentWillReceiveProps(nextProps) {
      var currentView = nextProps.currentView,
          instant = nextProps.instant,
          children = nextProps.children;

      // update instant state from props

      if (this.props.instant !== instant) {
        this._setValueInstantly(instant);
      }

      // update state with new index if necessary
      if ((typeof currentView === 'undefined' ? 'undefined' : _typeof(currentView)) !== undefined && this.props.currentView !== currentView) {
        this.scrollTo((0, _getIndex2.default)(currentView, children));
      }

      // update any options that have changed
      if (isNotEqual(this.props, nextProps)) {
        this.context.pager.setOptions(nextProps);
        this._hydrate = true;
      }
    }
  }, {
    key: 'componentDidUpdate',
    value: function componentDidUpdate(nextProps) {
      if (this._hydrate) {
        this.context.pager.hydrate();
        this._hydrate = false;
      }
    }
  }, {
    key: 'prev',
    value: function prev() {
      this.context.pager.prev();
    }
  }, {
    key: 'next',
    value: function next() {
      this.context.pager.next();
    }
  }, {
    key: 'scrollTo',
    value: function scrollTo(index) {
      this.context.pager.setCurrentView({ index: index });
    }
  }, {
    key: '_setValueInstantly',
    value: function _setValueInstantly(instant, reset) {
      var _this5 = this;

      this.setState({ instant: instant }, function () {
        if (reset) {
          _this5.setState({ instant: false });
        }
      });
    }
  }, {
    key: '_getTrackStyle',
    value: function _getTrackStyle() {
      var trackPosition = this.context.pager.trackPosition;

      if (!this.state.instant) {
        trackPosition = (0, _reactMotion.spring)(trackPosition, this.props.springConfig);
      }
      return { trackPosition: trackPosition };
    }
  }, {
    key: 'render',
    value: function render() {
      var _props2 = this.props,
          tag = _props2.tag,
          onScroll = _props2.onScroll,
          restProps = _objectWithoutProperties(_props2, ['tag', 'onScroll']);

      return _react2.default.createElement(
        _reactMotion.Motion,
        {
          style: this._getTrackStyle(),
          onRest: this._handleOnRest
        },
        function (_ref4) {
          var trackPosition = _ref4.trackPosition;
          return (0, _react.createElement)(TrackScroller, (0, _specialAssign2.default)({ trackPosition: trackPosition, tag: tag, onScroll: onScroll }, restProps, checkedProps));
        }
      );
    }
  }]);

  return Track;
}(_react.Component);

Track.propTypes = checkedProps;
Track.defaultProps = {
  tag: 'div',
  currentView: 0,
  viewsToShow: 1,
  viewsToMove: 1,
  align: 0,
  contain: false,
  axis: 'x',
  infinite: false,
  instant: false,
  swipe: true,
  swipeThreshold: 0.5,
  flickTimeout: 300,
  springConfig: _reactMotion.presets.noWobble,
  onSwipeStart: noop,
  onSwipeMove: noop,
  onSwipeEnd: noop,
  onScroll: noop,
  onViewChange: noop,
  onRest: noop
};
Track.contextTypes = {
  pager: _propTypes2.default.instanceOf(_Pager2.default)
};
exports.default = Track;
module.exports = exports['default'];