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| import _ from 'lodash';
import React from 'react';
import PropTypes from 'prop-types';
import ReactTransitionGroup from 'react-transition-group/CSSTransitionGroup';
import { lucidClassNames } from '../../util/style-helpers';
import {
createClass,
getFirst,
findTypes,
omitProps,
} from '../../util/component-types';
import { buildHybridComponent } from '../../util/state-management';
import ChevronIcon from '../Icon/ChevronIcon/ChevronIcon';
import Collapsible from '../Collapsible/Collapsible';
import * as reducers from './Expander.reducers';
const cx = lucidClassNames.bind('&-Expander');
const { any, bool, func, node, object, oneOf, string } = PropTypes;
/**
* {"categories": ["layout"], "madeFrom": ["ChevronIcon"]}
*
* This is a container that provides a toggle that controls when the content is
* shown.
*/
const Expander = createClass({
displayName: 'Expander',
components: {
/**
* Renders a `<span>` to be shown next to the expander icon.
*/
Label: createClass({
displayName: 'Expander.Label',
propName: 'Label',
propTypes: {
/**
* Used to identify the purpose of this switch to the user -- can be
* any renderable content.
*/
children: node,
},
}),
},
reducers,
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,
/**
* Called when the user clicks on the component's header.
*
* Signature: `(isExpanded, { event, props }) => {}`
*/
onToggle: func,
/**
* Passed through to the root element.
*/
style: object,
/**
* Child element whose children represents content to be shown next to
* the expander icon.
*/
Label: any,
/**
* Renders different variants of Expander. 'simple' is default. 'highlighted' is more prominant.
*/
kind: oneOf(['simple', 'highlighted']),
},
getDefaultProps() {
return {
isExpanded: false,
onToggle: _.noop,
kind: 'simple',
};
},
componentWillReceiveProps(nextProps) {
const currentLabel = _.get(
getFirst(this.props, Expander.Label),
'props.children',
null
);
const nextLabel = _.get(
getFirst(nextProps, Expander.Label),
'props.children',
null
);
if (currentLabel !== nextLabel) {
this._labelKey++;
}
},
componentWillMount() {
this._labelKey = 0;
},
render() {
const {
children,
className,
isExpanded,
style,
kind,
...passThroughs
} = this.props;
const labelChildProp = _.first(
_.map(findTypes(this.props, Expander.Label), 'props')
);
return (
<div
{...omitProps(passThroughs, Expander)}
className={cx(
'&',
{
'&-is-expanded': isExpanded,
'&-kind-highlighted': kind === 'highlighted',
},
className
)}
style={style}
>
<header className={cx('&-header')} onClick={this.handleToggle}>
<span className={cx('&-icon')}>
<ChevronIcon direction={isExpanded ? 'up' : 'down'} />
</span>
<ReactTransitionGroup
transitionName={cx('&-text')}
transitionEnterTimeout={100}
transitionLeaveTimeout={100}
className={cx('&-text')}
>
{labelChildProp
? <span key={this._labelKey}>{labelChildProp.children}</span>
: null}
</ReactTransitionGroup>
</header>
<Collapsible
isExpanded={isExpanded}
rootType="section"
className={cx('&-content')}
>
{children}
</Collapsible>
</div>
);
},
handleToggle(event) {
this.props.onToggle(!this.props.isExpanded, {
event,
props: this.props,
});
},
});
export default buildHybridComponent(Expander);
export { Expander as ExpanderDumb };
|