rc-ptr/dist/index.js

Overlay Component

'use strict';

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

var _defineProperty2 = require('babel-runtime/helpers/defineProperty');

var _defineProperty3 = _interopRequireDefault(_defineProperty2);

var _getPrototypeOf = require('babel-runtime/core-js/object/get-prototype-of');

var _getPrototypeOf2 = _interopRequireDefault(_getPrototypeOf);

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _possibleConstructorReturn2 = require('babel-runtime/helpers/possibleConstructorReturn');

var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

var _inherits2 = require('babel-runtime/helpers/inherits');

var _inherits3 = _interopRequireDefault(_inherits2);

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

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

var _reactDom2 = _interopRequireDefault(_reactDom);

var _style = require('./style.css');

var _style2 = _interopRequireDefault(_style);

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _rcIspinner = require('rc-ispinner');

var _rcIspinner2 = _interopRequireDefault(_rcIspinner);

var _classnames = require('classnames');

var _classnames2 = _interopRequireDefault(_classnames);

var _once = require('once');

var _once2 = _interopRequireDefault(_once);

var _classes = require('classes');

var _classes2 = _interopRequireDefault(_classes);

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

var STAGE_INIT = 0;
var STAGE_ROTATE = 1;
var STAGE_LOADING = 2;

var Ptr = function (_Component) {
  (0, _inherits3.default)(Ptr, _Component);

  function Ptr(props) {
    (0, _classCallCheck3.default)(this, Ptr);

    var _this = (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(Ptr).call(this, props));

    _this.onscroll = function (e) {
      e.preventDefault();
      var state = _this.state;
      if (state.stage === STAGE_LOADING) return;
      var top = _this.scrollable.scrollTop;
      if (top > -30) {
        _this.setState({
          stage: STAGE_INIT
        });
      } else if (top < -30) {
        _this.setState({
          stage: STAGE_ROTATE
        });
      }
    };

    _this.ontouchend = function (e) {
      if (_this.state.stage === STAGE_ROTATE) {
        e.stopImmediatePropagation();
        _this.refresh();
      }
    };

    _this.state = {
      stage: STAGE_INIT
    };
    return _this;
  }

  (0, _createClass3.default)(Ptr, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      var el = _reactDom2.default.findDOMNode(this);
      var scrollable = this.scrollable = findScrollable(el);
      if (!this.scrollable) throw new Error('scrollable element not found');
      scrollable.addEventListener('scroll', this.onscroll, false);
      document.addEventListener('touchend', this.ontouchend);
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      if (this.scrollable) {
        this.scrollable.removeEventListener('scroll', this.onscroll, false);
        document.removeEventListener('touchend', this.ontouchend);
      }
    }
  }, {
    key: 'render',
    value: function render() {
      var _cx;

      var children = void 0;
      var stage = this.state.stage;
      if (stage === STAGE_LOADING) {
        if (this.props.spinner) {
          children = _react2.default.createElement(_rcIspinner2.default, { type: 'gray', width: 20 });
        } else {
          children = this.props.children;
        }
      } else {
        children = null;
      }
      var className = (0, _classnames2.default)((_cx = {}, (0, _defineProperty3.default)(_cx, _style2.default.image, stage == STAGE_INIT || stage == STAGE_ROTATE), (0, _defineProperty3.default)(_cx, _style2.default.rotate, stage == STAGE_ROTATE), (0, _defineProperty3.default)(_cx, _style2.default.center, stage == STAGE_LOADING), _cx));
      return _react2.default.createElement(
        'div',
        { className: _style2.default.ptr },
        _react2.default.createElement(
          'div',
          { className: className },
          children
        )
      );
    }
  }, {
    key: 'refresh',
    value: function refresh() {
      this.setState({
        stage: STAGE_LOADING
      });
      var scrollable = this.scrollable;
      scrollable.scrollTop = -30;
      var self = this;
      var cb = (0, _once2.default)(function () {
        scrollable.scrollTop = 0;
        self.setState({
          stage: STAGE_INIT
        });
      });
      var res = this.props.callback(cb);
      if (res && typeof res.then === 'function') {
        res.then(cb, cb);
      }
    }
  }]);
  return Ptr;
}(_react.Component);

Ptr.defaultProps = {
  spinner: true
};
Ptr.propTypes = {
  spinner: _propTypes2.default.bool,
  callback: _propTypes2.default.func.isRequired
};
exports.default = Ptr;


var body = document.body;
function findScrollable(el) {
  while (el) {
    el = el.parentNode;
    if ((0, _classes2.default)(el).has('scrollable')) return el;
    if (el === body) return null;
  }
}