87 lines
1.9 KiB
JavaScript
87 lines
1.9 KiB
JavaScript
import React from 'react';
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import ColumnHeader from './column_header';
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import PropTypes from 'prop-types';
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const easingOutQuint = (x, t, b, c, d) => c*((t=t/d-1)*t*t*t*t + 1) + b;
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const scrollTop = (node) => {
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const startTime = Date.now();
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const offset = node.scrollTop;
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const targetY = -offset;
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const duration = 1000;
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let interrupt = false;
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const step = () => {
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const elapsed = Date.now() - startTime;
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const percentage = elapsed / duration;
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if (percentage > 1 || interrupt) {
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return;
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}
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node.scrollTop = easingOutQuint(0, elapsed, offset, targetY, duration);
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requestAnimationFrame(step);
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};
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step();
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return () => {
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interrupt = true;
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};
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};
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class Column extends React.PureComponent {
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static propTypes = {
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heading: PropTypes.string,
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icon: PropTypes.string,
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children: PropTypes.node,
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active: PropTypes.bool,
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hideHeadingOnMobile: PropTypes.bool
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};
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handleHeaderClick = () => {
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const scrollable = this.node.querySelector('.scrollable');
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if (!scrollable) {
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return;
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}
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this._interruptScrollAnimation = scrollTop(scrollable);
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}
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handleWheel = () => {
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if (typeof this._interruptScrollAnimation !== 'undefined') {
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this._interruptScrollAnimation();
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}
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}
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setRef = (c) => {
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this.node = c;
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}
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render () {
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const { heading, icon, children, active, hideHeadingOnMobile } = this.props;
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let columnHeaderId = null
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let header = '';
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if (heading) {
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columnHeaderId = heading.replace(/ /g, '-')
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header = <ColumnHeader icon={icon} active={active} type={heading} onClick={this.handleHeaderClick} hideOnMobile={hideHeadingOnMobile} columnHeaderId={columnHeaderId}/>;
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}
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return (
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<div
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ref={this.setRef}
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role='region'
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aria-labelledby={columnHeaderId}
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className='column'
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onWheel={this.handleWheel}>
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{header}
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{children}
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</div>
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);
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}
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}
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export default Column;
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