react-ctxmenu-trigger/es/LazyRenderBox.js

base abstract ctx menu trigger component for react

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; }

import React, { Component } from 'react';
import PropTypes from 'prop-types';

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

  function LazyRenderBox() {
    _classCallCheck(this, LazyRenderBox);

    return _possibleConstructorReturn(this, _Component.apply(this, arguments));
  }

  LazyRenderBox.prototype.shouldComponentUpdate = function shouldComponentUpdate(nextProps) {
    return nextProps.hiddenClassName || nextProps.visible;
  };

  LazyRenderBox.prototype.render = function render() {
    var _props = this.props,
        hiddenClassName = _props.hiddenClassName,
        visible = _props.visible,
        props = _objectWithoutProperties(_props, ['hiddenClassName', 'visible']);

    if (hiddenClassName || React.Children.count(props.children) > 1) {
      if (!visible && hiddenClassName) {
        props.className += ' ' + hiddenClassName;
      }
      return React.createElement('div', props);
    }

    return React.Children.only(props.children);
  };

  return LazyRenderBox;
}(Component);

LazyRenderBox.propTypes = {
  children: PropTypes.any,
  className: PropTypes.string,
  visible: PropTypes.bool,
  hiddenClassName: PropTypes.string
};


export default LazyRenderBox;