superset-frontend/packages/superset-frontend/src/dashboard/components/menu/HoverMenu.jsx

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import React from 'react';
import PropTypes from 'prop-types';
import cx from 'classnames';

const propTypes = {
  position: PropTypes.oneOf(['left', 'top']),
  innerRef: PropTypes.func,
  children: PropTypes.node,
};

const defaultProps = {
  position: 'left',
  innerRef: null,
  children: null,
};

export default class HoverMenu extends React.PureComponent {
  render() {
    const { innerRef, position, children } = this.props;
    return (
      <div
        ref={innerRef}
        className={cx(
          'hover-menu',
          position === 'left' && 'hover-menu--left',
          position === 'top' && 'hover-menu--top',
        )}
      >
        {children}
      </div>
    );
  }
}

HoverMenu.propTypes = propTypes;
HoverMenu.defaultProps = defaultProps;