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| import _ from 'lodash';
import React from 'react';
import ReactCSSTransitionGroup from 'react-addons-css-transition-group';
import { lucidClassNames } from '../../util/style-helpers';
import { createClass, getFirst, findTypes, omitProps } from '../../util/component-types';
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,
} = React.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>
<ReactCSSTransitionGroup
transitionName={cx('&-text')}
transitionEnterTimeout={100}
transitionLeaveTimeout={100}
className={cx('&-text')}
>
{labelChildProp ?
<span key={this._labelKey}>{labelChildProp.children}</span>
: null}
</ReactCSSTransitionGroup>
</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 Expander;
|