@lyra/components/lib/utilities/Escapable.js

Basic UX components

'use strict';

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

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

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

function createListener(eventName) {
  let listeners = [];
  return listen;

  function notify(event) {
    listeners.forEach(l => l(event));
  }

  function unlisten(listener) {
    listeners = listeners.filter(l => l !== listener);
    if (listeners.length === 0) {
      document.removeEventListener(eventName, notify);
    }
  }

  function listen(listener) {
    if (listeners.length === 0) {
      document.addEventListener(eventName, notify);
    }
    listeners.push(listener);
    return () => unlisten(listener);
  }
}

const onKeypress = createListener('keydown');

class Escapable extends _react2.default.Component {
  constructor(...args) {
    var _temp;

    return _temp = super(...args), this.handleKeyPress = event => {
      if (this.props.onEscape && event.key === 'Escape') {
        this.props.onEscape(event);
      }
    }, _temp;
  }

  componentWillMount() {
    this.removeListener = onKeypress(this.handleKeyPress);
  }

  componentWillUnmount() {
    this.removeListener();
  }

  render() {
    return this.props.children || null;
  }
}
exports.default = Escapable;
Escapable.propTypes = {
  onEscape: _propTypes2.default.func.isRequired,
  children: _propTypes2.default.node
};