70 lines
1.7 KiB
JavaScript
70 lines
1.7 KiB
JavaScript
// @flow
|
|
import React from 'react';
|
|
import classnames from 'classnames';
|
|
import Button from 'component/button';
|
|
import { useOnResize } from 'effects/use-on-resize';
|
|
|
|
const COLLAPSED_HEIGHT = 120;
|
|
|
|
type Props = {
|
|
children: React$Node | Array<React$Node>,
|
|
};
|
|
|
|
export default function Expandable(props: Props) {
|
|
const { children } = props;
|
|
|
|
const ref = React.useRef();
|
|
|
|
const [expanded, setExpanded] = React.useState(false);
|
|
const [childRect, setRect] = React.useState();
|
|
|
|
const childOverflows = childRect && childRect.height > COLLAPSED_HEIGHT;
|
|
|
|
function handleClick() {
|
|
setExpanded(!expanded);
|
|
}
|
|
|
|
// Update the rect when children changes,
|
|
// this is needed when there is an image or claim embed
|
|
// to be loaded ! :D
|
|
React.useLayoutEffect(() => {
|
|
if (ref.current) {
|
|
const childElem = ref.current.children[0];
|
|
setRect(childElem.getBoundingClientRect());
|
|
}
|
|
}, [children]);
|
|
|
|
const expandableRef = React.useCallback((node) => {
|
|
if (node) {
|
|
const childElem = node.children[0];
|
|
setRect(childElem.getBoundingClientRect());
|
|
ref.current = node;
|
|
}
|
|
}, []);
|
|
|
|
// Update the childRect initially & when the window size changes.
|
|
useOnResize(() => expandableRef(ref.current));
|
|
|
|
return (
|
|
<>
|
|
<div
|
|
className={classnames('expandable', {
|
|
'expandable--open': expanded,
|
|
'expandable--closed-fade': !expanded && childOverflows,
|
|
})}
|
|
ref={expandableRef}
|
|
>
|
|
{children}
|
|
</div>
|
|
|
|
{childOverflows && (
|
|
<Button
|
|
button="link"
|
|
className="expandable__button"
|
|
label={expanded ? __('Less') : __('More')}
|
|
onClick={handleClick}
|
|
/>
|
|
)}
|
|
</>
|
|
);
|
|
}
|