content: import React from 'react';
  import ColumnHeader from './column_header';
  import PropTypes from 'prop-types';
  import { debounce } from 'lodash';
  import { scrollTop } from '../../../scroll';
  import { isMobile } from '../../../is_mobile';
  
  export default class Column extends React.PureComponent {
  
    static propTypes = {
      heading: PropTypes.string,
      icon: PropTypes.string,
      children: PropTypes.node,
      active: PropTypes.bool,
      hideHeadingOnMobile: PropTypes.bool,
    };
  
    handleHeaderClick = () => {
      const scrollable = this.node.querySelector('.scrollable');
  
      if (!scrollable) {
        return;
      }
  
      this._interruptScrollAnimation = scrollTop(scrollable);
    }
  
    scrollTop () {
      const scrollable = this.node.querySelector('.scrollable');
  
      if (!scrollable) {
        return;
      }
  
      this._interruptScrollAnimation = scrollTop(scrollable);
    }
  
  
    handleScroll = debounce(() => {
      if (typeof this._interruptScrollAnimation !== 'undefined') {
        this._interruptScrollAnimation();
      }
    }, 200)
  
    setRef = (c) => {
      this.node = c;
    }
  
    render () {
      const { heading, icon, children, active, hideHeadingOnMobile } = this.props;
  
      const showHeading = heading && (!hideHeadingOnMobile || (hideHeadingOnMobile && !isMobile(window.innerWidth)));
  
      const columnHeaderId = showHeading && heading.replace(/ /g, '-');
      const header = showHeading && (
        <ColumnHeader icon={icon} active={active} type={heading} onClick={this.handleHeaderClick} columnHeaderId={columnHeaderId} />
      );
      return (
        <div
          ref={this.setRef}
          role='region'
          aria-labelledby={columnHeaderId}
          className='column'
          onScroll={this.handleScroll}
        >
          {header}
          {children}
        </div>
      );
    }
  
  }
  