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Cover.jsx
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Cover.jsx
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import cx from 'classnames';
import { TimelineMax } from 'gsap/TweenMax';
import PropTypes from 'prop-types';
import React from 'react';
import ReactDOM from 'react-dom';
import { UtilitySystem } from '.';
class Cover extends React.Component {
state = {
renderCover: false,
};
componentWillReceiveProps(nextProps) {
if (!this.props.open && nextProps.open) {
this.setState({
renderCover: true,
});
}
}
componentDidUpdate(prevProps) {
if (!prevProps.open && this.props.open) {
this.attachTimeline();
}
if (prevProps.open !== this.props.open) {
if (this.props.open) {
this.openCover();
} else {
this.closeCover();
}
}
}
/**
* Called after the cover animation is done closing
* Takes care of removing `<Cover />` from DOM
*
*/
onReverseComplete = () => {
this.setState({
renderCover: false,
}, () => {
if (this.props.onReverseComplete) {
this.props.onReverseComplete();
}
});
}
attachTimeline = () => {
const $body = document.body;
const $cover = this.cover;
let forward = true;
let lastTime = 0;
// Attach timeline to each instance
$cover.timeline = new TimelineMax({
paused: !this.props.open,
onStart: () => {
$body.classList.add('cover-open');
$cover.classList.add(UtilitySystem.config.classes.open);
// Fire off prop update
if (this.props.onStart) this.props.onStart();
},
onUpdate: () => {
const newTime = $cover.timeline.time();
if ((forward && newTime < lastTime) || (!forward && newTime > lastTime)) {
forward = !forward;
if (!forward) {
// Fire off prop update
if (this.props.onReverseStart) this.props.onReverseStart();
$body.classList.remove('cover-open');
$cover.classList.remove(UtilitySystem.config.classes.open);
}
}
lastTime = newTime;
},
onComplete: () => {
// Focus on active cover for screen readers
$cover.focus();
// Fire off prop update
if (this.props.onComplete) this.props.onComplete();
},
onReverseComplete: () => {
// Fire off function that handles prop update and removal from DOM
if (this.onReverseComplete) this.onReverseComplete();
},
});
$cover.timeline
.set($cover, {
css: {
display: 'flex',
},
})
.to($cover, 0.5, {
css: {
opacity: 1,
y: 0,
},
ease: UtilitySystem.config.easing,
});
}
/**
* Open cover
* @return {void}
*/
openCover = () => {
const $cover = this.cover;
$cover.timeline.play();
}
/**
* Close cover
* @return {void}
*/
closeCover = () => {
const $cover = this.cover;
$cover.timeline.reverse();
}
render() {
const { children, className } = this.props;
const classes = cx('cover', className);
const { renderCover } = this.state;
return (
renderCover &&
ReactDOM.createPortal(
<div className={classes} ref={ref => (this.cover = ref)}>
{children}
</div>,
document.body,
)
);
}
}
Cover.propTypes = {
children: PropTypes.node,
className: PropTypes.string,
open: PropTypes.bool,
onComplete: PropTypes.func,
onReverseComplete: PropTypes.func,
onReverseStart: PropTypes.func,
onStart: PropTypes.func,
};
export default Cover;