react-virtualized/dist/es/ScrollSync/ScrollSync.js

React components for efficiently rendering large, scrollable lists and tabular data

import _Object$getPrototypeOf from 'babel-runtime/core-js/object/get-prototype-of';
import _classCallCheck from 'babel-runtime/helpers/classCallCheck';
import _createClass from 'babel-runtime/helpers/createClass';
import _possibleConstructorReturn from 'babel-runtime/helpers/possibleConstructorReturn';
import _inherits from 'babel-runtime/helpers/inherits';
import PropTypes from 'prop-types';
import * as React from 'react';

/**
 * HOC that simplifies the process of synchronizing scrolling between two or more virtualized components.
 */

var ScrollSync = function (_React$PureComponent) {
  _inherits(ScrollSync, _React$PureComponent);

  function ScrollSync(props, context) {
    _classCallCheck(this, ScrollSync);

    var _this = _possibleConstructorReturn(this, (ScrollSync.__proto__ || _Object$getPrototypeOf(ScrollSync)).call(this, props, context));

    _this.state = {
      clientHeight: 0,
      clientWidth: 0,
      scrollHeight: 0,
      scrollLeft: 0,
      scrollTop: 0,
      scrollWidth: 0
    };

    _this._onScroll = _this._onScroll.bind(_this);
    return _this;
  }

  _createClass(ScrollSync, [{
    key: 'render',
    value: function render() {
      var children = this.props.children;
      var _state = this.state,
          clientHeight = _state.clientHeight,
          clientWidth = _state.clientWidth,
          scrollHeight = _state.scrollHeight,
          scrollLeft = _state.scrollLeft,
          scrollTop = _state.scrollTop,
          scrollWidth = _state.scrollWidth;


      return children({
        clientHeight: clientHeight,
        clientWidth: clientWidth,
        onScroll: this._onScroll,
        scrollHeight: scrollHeight,
        scrollLeft: scrollLeft,
        scrollTop: scrollTop,
        scrollWidth: scrollWidth
      });
    }
  }, {
    key: '_onScroll',
    value: function _onScroll(_ref) {
      var clientHeight = _ref.clientHeight,
          clientWidth = _ref.clientWidth,
          scrollHeight = _ref.scrollHeight,
          scrollLeft = _ref.scrollLeft,
          scrollTop = _ref.scrollTop,
          scrollWidth = _ref.scrollWidth;

      this.setState({
        clientHeight: clientHeight,
        clientWidth: clientWidth,
        scrollHeight: scrollHeight,
        scrollLeft: scrollLeft,
        scrollTop: scrollTop,
        scrollWidth: scrollWidth
      });
    }
  }]);

  return ScrollSync;
}(React.PureComponent);

export default ScrollSync;
ScrollSync.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * Function responsible for rendering 2 or more virtualized components.
   * This function should implement the following signature:
   * ({ onScroll, scrollLeft, scrollTop }) => PropTypes.element
   */
  children: PropTypes.func.isRequired
} : {};