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| import _ from 'lodash';
import React from 'react';
import PropTypes from 'prop-types';
import { Motion, spring } from 'react-motion';
import { QUICK_SLIDE_MOTION } from '../../constants/motion-spring';
import { lucidClassNames } from '../../util/style-helpers';
import { createClass, omitProps } from '../../util/component-types';
const cx = lucidClassNames.bind('&-Collapsible');
const { any, bool, node, number, string } = PropTypes;
/**
* {"categories": ["utility"]}
*
* This is a simple container that can render content as expanded or collapsed.
*/
const Collapsible = createClass({
displayName: 'Collapsible',
_isPrivate: true,
propTypes: {
/**
* Expandable content.
*/
children: node,
/**
* Appended to the component-specific class names set on the root
* element.
*/
className: string,
/**
* Indicates that the component is in the "expanded" state when true
* and in the "unexpanded" state when false.
*/
isExpanded: bool,
/**
* Show an animated transition for alternating values of `isExpanded`.
*/
isAnimated: bool,
/**
* If true, do not render children when fully collapsed.
*/
isMountControlled: bool,
/**
* If `isMountControlled` is true, this value sets is the minimum height
* the container needs to reach to not render any children.
*/
mountControlThreshold: number,
/**
* Pass in a custom root element type.
*/
rootType: any,
},
getDefaultProps() {
return {
isExpanded: true,
isAnimated: true,
isMountControlled: true,
mountControlThreshold: 4,
rootType: 'div',
};
},
getInitialState() {
return {
maxHeight: null,
};
},
storeRef(name) {
return ref => {
this.Refs[name] = ref;
};
},
componentWillMount() {
this.Refs = {};
this.isAnimated = false;
this.delayTimer = null;
},
componentDidMount() {
_.delay(() => {
this.setState({
maxHeight: _.get(this.Refs, 'root.scrollHeight'),
});
this.isAnimated = this.props.isAnimated;
}, 32);
},
componentDidUpdate() {
this.isAnimated = false;
this.delayTimer = _.delay(() => {
if (this.props.isExpanded) {
const maxHeight = _.get(this.Refs, 'root.scrollHeight');
if (maxHeight !== this.state.maxHeight) {
this.setState({
maxHeight,
});
}
}
this.isAnimated = this.props.isAnimated;
}, 32);
},
componentWillUnmount() {
this.delayTimer && clearTimeout(this.delayTimer);
},
render() {
const {
children,
className,
isExpanded,
isMountControlled,
mountControlThreshold,
rootType,
...passThroughs
} = this.props;
const { maxHeight } = this.state;
return (
<Motion
style={
this.isAnimated
? {
height: isExpanded && !_.isNull(maxHeight)
? spring(maxHeight, QUICK_SLIDE_MOTION)
: spring(0, QUICK_SLIDE_MOTION),
}
: {
height: isExpanded && !_.isNull(maxHeight) ? maxHeight : 0,
}
}
>
{tween =>
React.createElement(
rootType,
{
...omitProps(passThroughs, Collapsible),
ref: this.storeRef('root'),
className: cx('&', className),
style: {
height: tween.height !== maxHeight
? tween.height < 0 ? 0 : tween.height
: null,
overflow: 'hidden',
padding: 0,
...passThroughs.style,
},
},
[
<div
key="content"
className={cx('&-content')}
style={{ margin: 0 }}
>
{isMountControlled && !isExpanded
? _.isNull(maxHeight) ||
Math.abs(tween.height) > mountControlThreshold
? children
: null
: children}
</div>,
]
)}
</Motion>
);
},
});
export default Collapsible;
|