about summary refs log tree commit diff
path: root/app/assets/javascripts/components/features/ui/components/column.jsx
blob: 4dad7f72131fe896aa4ae97d1b97bf24b5b48812 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
import ColumnHeader from './column_header';
import PropTypes from 'prop-types';

const easingOutQuint = (x, t, b, c, d) => c*((t=t/d-1)*t*t*t*t + 1) + b;

const scrollTop = (node) => {
  const startTime = Date.now();
  const offset    = node.scrollTop;
  const targetY   = -offset;
  const duration  = 1000;
  let interrupt   = false;

  const step = () => {
    const elapsed    = Date.now() - startTime;
    const percentage = elapsed / duration;

    if (percentage > 1 || interrupt) {
      return;
    }

    node.scrollTop = easingOutQuint(0, elapsed, offset, targetY, duration);
    requestAnimationFrame(step);
  };

  step();

  return () => {
    interrupt = true;
  };
};

class Column extends React.PureComponent {

  constructor (props, context) {
    super(props, context);
    this.handleHeaderClick = this.handleHeaderClick.bind(this);
    this.handleWheel = this.handleWheel.bind(this);
  }

  handleHeaderClick () {
    const scrollable = ReactDOM.findDOMNode(this).querySelector('.scrollable');
    if (!scrollable) {
      return;
    }
    this._interruptScrollAnimation = scrollTop(scrollable);
  }

  handleWheel () {
    if (typeof this._interruptScrollAnimation !== 'undefined') {
      this._interruptScrollAnimation();
    }
  }

  render () {
    const { heading, icon, children, active, hideHeadingOnMobile } = this.props;

    let header = '';

    if (heading) {
      header = <ColumnHeader icon={icon} active={active} type={heading} onClick={this.handleHeaderClick} hideOnMobile={hideHeadingOnMobile} />;
    }

    return (
      <div role='section' aria-label={heading} className='column' onWheel={this.handleWheel}>
        {header}
        {children}
      </div>
    );
  }

}

Column.propTypes = {
  heading: PropTypes.string,
  icon: PropTypes.string,
  children: PropTypes.node,
  active: PropTypes.bool,
  hideHeadingOnMobile: PropTypes.bool
};

export default Column;