'use strict';

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

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 _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _lodash = require('lodash');

var _lodash2 = _interopRequireDefault(_lodash);

var _TableWrapShadow = require('./styles/TableWrapShadow');

var _TableWrapShadow2 = _interopRequireDefault(_TableWrapShadow);

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

// FIXME: profiling suggests this component is inefficient with rendering.

var TableWrap = function (_React$Component) {
  (0, _inherits3.default)(TableWrap, _React$Component);

  function TableWrap() {
    var _ref;

    var _temp, _this, _ret;

    (0, _classCallCheck3.default)(this, TableWrap);

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

    return _ret = (_temp = (_this = (0, _possibleConstructorReturn3.default)(this, (_ref = TableWrap.__proto__ || (0, _getPrototypeOf2.default)(TableWrap)).call.apply(_ref, [this].concat(args))), _this), _this.state = {
      shadow: null
    }, _this.updateAndSubscribeWrapShadowChanges = function () {
      _this.setWrapShadow(_this.computeWrapShadow());

      _this._wrap.addEventListener('scroll', _lodash2.default.debounce(function () {
        _this.setWrapShadow(_this.computeWrapShadow());
      }, 300, { leading: true }));

      window.addEventListener('resize', _lodash2.default.debounce(function () {
        _this.setWrapShadow(_this.computeWrapShadow());
      }, 300, { leading: true }));
    }, _this.setWrapShadow = function (shadow) {
      if (_this.state.shadow === shadow) {
        return;
      }

      _this.setState({ shadow: shadow });
    }, _this.computeWrapShadow = function () {
      var wrap = _this._wrap;

      if (!wrap) {
        return null;
      }

      var left = wrap.scrollLeft > 0;
      var right = wrap.scrollWidth !== wrap.clientWidth + wrap.scrollLeft;

      if (left && right) {
        return 'both';
      } else if (left) {
        return 'left';
      } else if (right) {
        return 'right';
      }

      return null;
    }, _temp), (0, _possibleConstructorReturn3.default)(_this, _ret);
  }

  (0, _createClass3.default)(TableWrap, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      this.updateAndSubscribeWrapShadowChanges();
    }
  }, {
    key: 'componentDidUpdate',
    value: function componentDidUpdate() {
      this.updateAndSubscribeWrapShadowChanges();
    }
  }, {
    key: 'render',
    value: function render() {
      var _this2 = this;

      var _props = this.props,
          children = _props.children,
          Styles = _props.Styles;


      return _react2.default.createElement(
        Styles,
        { innerRef: function innerRef(el) {
            return _this2._wrap = el;
          }, shadow: this.state.shadow },
        children
      );
    }
  }]);
  return TableWrap;
}(_react2.default.Component);

TableWrap.propTypes = {
  children: _propTypes2.default.node.isRequired,
  /**
   * A component to render as the wrapping component.
   * Passed a prop, 'shadow'=['left'|'right'|'both'], to indicate
   * the scroll position and what side of the wrapper should be shadowed.
   */
  Styles: _propTypes2.default.func.isRequired
};
TableWrap.defaultProps = {
  Styles: _TableWrapShadow2.default
};
exports.default = TableWrap;