superset-frontend/packages/superset-frontend/src/dashboard/components/UndoRedoKeylisteners.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';

const propTypes = {
  onUndo: PropTypes.func.isRequired,
  onRedo: PropTypes.func.isRequired,
};

class UndoRedoKeylisteners extends React.PureComponent {
  constructor(props) {
    super(props);
    this.handleKeydown = this.handleKeydown.bind(this);
  }

  componentDidMount() {
    document.addEventListener('keydown', this.handleKeydown);
  }

  componentWillUnmount() {
    document.removeEventListener('keydown', this.handleKeydown);
  }

  handleKeydown(event) {
    const controlOrCommand = event.ctrlKey || event.metaKey;
    if (controlOrCommand) {
      const isZChar = event.key === 'z' || event.keyCode === 90;
      const isYChar = event.key === 'y' || event.keyCode === 89;
      const isEditingMarkdown =
        document && document.querySelector('.dashboard-markdown--editing');

      if (!isEditingMarkdown && (isZChar || isYChar)) {
        event.preventDefault();
        const func = isZChar ? this.props.onUndo : this.props.onRedo;
        func();
      }
    }
  }

  render() {
    return null;
  }
}

UndoRedoKeylisteners.propTypes = propTypes;

export default UndoRedoKeylisteners;