import React from 'react'; import PropTypes from 'prop-types'; import ImmutablePropTypes from 'react-immutable-proptypes'; import ImmutablePureComponent from 'react-immutable-pure-component'; import HomeTimeline from '../../home_timeline'; import Notifications from '../../notifications'; import PublicTimeline from '../../public_timeline'; import CommunityTimeline from '../../community_timeline'; import HashtagTimeline from '../../hashtag_timeline'; import Compose from '../../compose'; const componentMap = { 'COMPOSE': Compose, 'HOME': HomeTimeline, 'NOTIFICATIONS': Notifications, 'PUBLIC': PublicTimeline, 'COMMUNITY': CommunityTimeline, 'HASHTAG': HashtagTimeline, }; class ColumnsArea extends ImmutablePureComponent { static propTypes = { columns: ImmutablePropTypes.list.isRequired, singleColumn: PropTypes.bool, children: PropTypes.node, }; render () { const { columns, children, singleColumn } = this.props; if (singleColumn) { return (