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useRef,
useState,
useEffect,
useMemo,
type ReactNode,
type ReactElement,
type Dispatch,
type SetStateAction,
type HTMLAttributes,
useCallback,
Fragment,
} from 'react';
import cn from 'classnames';
import Button, { type ButtonProps } from './button';
import '../styles/components/dropdown.scss';
export type DropdownButtonProps = {
/**
* Content revealed on click.
*/
children:
| ReactNode
| ((showMenu: Dispatch<SetStateAction<boolean>>) => ReactNode);
/**
* Label to be display by the button
*/
label: ReactNode;
/**
* Open on pointer over (useful for dropdowns in header)
*/
openOnHover?: boolean;
} & Omit<ButtonProps, 'children'>;
// Keep it around for now as it's still used in TreeSelect
/** @deprecated */
const DropdownButton = ({
children,
label,
className,
openOnHover = false,
...props
}: DropdownButtonProps) => {
const [showMenu, setShowMenu] = useState(false);
const [size, setSize] = useState<DOMRect>();
const ref = useRef<HTMLButtonElement>(null);
const dropdownRef = useRef<HTMLDivElement>(null);
const childType = typeof children;
// effect to handle a click on anything closing the dropdown
useEffect(() => {
Eif (!showMenu) {
return;
}
const listener = (event: MouseEvent | TouchEvent) => {
if (
!ref.current ||
ref.current?.parentElement?.contains(event.target as Node) ||
(childType === 'function' &&
dropdownRef.current?.contains(event.target as Node))
) {
return;
}
setShowMenu(false);
};
window.document.addEventListener('mouseup', listener);
window.document.addEventListener('touchend', listener);
// eslint-disable-next-line consistent-return
return () => {
window.document.removeEventListener('mouseup', listener);
window.document.removeEventListener('touchend', listener);
};
}, [showMenu, childType]);
useEffect(() => {
Iif (ref.current && showMenu) {
setSize(ref.current.getBoundingClientRect());
}
}, [showMenu]);
const style = useMemo(() => {
Eif (!size) {
return undefined;
}
const availableHeight = window.innerHeight - size.bottom;
return { top: size.height, maxHeight: availableHeight };
}, [size]);
return (
<div
className="dropdown-container"
// TODO: This code has been commented out as part of https://www.ebi.ac.uk/panda/jira/browse/TRM-25862
// Because Safari doesn't focus when clicking on a button: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/button#clicking_and_focus
// a jira has been made https://www.ebi.ac.uk/panda/jira/browse/TRM-26188 to investigate and implement ways to deal with this.
// Will leave the code here has a marker for that task.
// onBlur={(e) =>
// setShowMenu(e.currentTarget.contains(e.relatedTarget as Node))
// }
onPointerEnter={openOnHover ? () => setShowMenu(true) : undefined}
onPointerLeave={openOnHover ? () => setShowMenu(false) : undefined}
>
<Button
className={cn('dropdown', className)}
onClick={() => setShowMenu((showMenu) => !showMenu)}
ref={ref}
{...props}
>
{label}
</Button>
<div
className={cn('dropdown-menu', {
'dropdown-menu-open': showMenu,
})}
ref={dropdownRef}
style={style}
>
{showMenu &&
(typeof children === 'function' ? children(setShowMenu) : children)}
</div>
</div>
);
};
type ControlledDropdownProps = {
/**
* Element always visible used to open and close the dropdown
*/
visibleElement: ReactElement;
/**
* Whether the dropdown is open or closed
*/
expanded: boolean;
};
export const ControlledDropdown = ({
visibleElement,
expanded,
children,
className,
'aria-haspopup': ariaHaspopup,
...props
}: ControlledDropdownProps & HTMLAttributes<HTMLDivElement>) => (
<div
className={cn(className, 'dropdown')}
{...props}
aria-expanded={expanded}
aria-haspopup={ariaHaspopup || true}
>
{/* Not sure why fragments and keys are needed, but otherwise gets the
React key warnings messages and children are rendered as array... */}
<Fragment key="visible">{visibleElement}</Fragment>
<Fragment key="content">
{expanded && <div className="dropdown__content">{children}</div>}
</Fragment>
</div>
);
type DropdownProps = {
/**
* Prop that, when it changes, will cause the dropdown to close
*/
propChangeToClose?: unknown;
/**
* Render for element always visible used to open and close the dropdown
*/
visibleElement: (onClick: () => unknown) => ReactElement;
/**
* Close if a clickable element within is clicked
*/
children: ReactNode | ((closeDropdown: () => unknown) => ReactNode);
};
export const Dropdown = ({
visibleElement,
propChangeToClose,
className,
'aria-haspopup': ariaHaspopup,
children,
...props
}: Omit<ControlledDropdownProps, 'expanded' | 'visibleElement'> &
DropdownProps &
Omit<HTMLAttributes<HTMLDivElement>, 'children'>) => {
const [expanded, setExpanded] = useState(false);
const ref = useRef<HTMLDivElement>(null);
const close = useCallback(() => setExpanded(false), []);
// Effect in order to close the dropdown when the corresponding prop changes
useEffect(() => {
close();
}, [close, propChangeToClose]);
// effect to handle a click on anything closing the dropdown
useEffect(() => {
Eif (!expanded) {
return;
}
const listener = (event: MouseEvent | TouchEvent) => {
if (
!ref.current ||
(event.target && ref.current?.contains(event.target as Node))
) {
return;
}
close();
};
window.document.addEventListener('mouseup', listener, { passive: true });
window.document.addEventListener('touchend', listener, { passive: true });
// eslint-disable-next-line consistent-return
return () => {
window.document.removeEventListener('mouseup', listener);
window.document.removeEventListener('touchend', listener);
};
}, [close, expanded]);
const handleClick = useCallback(
() => setExpanded((expanded) => !expanded),
[]
);
return (
<div
className={cn(className, 'dropdown')}
{...props}
aria-expanded={expanded}
aria-haspopup={ariaHaspopup || true}
ref={ref}
>
{/* Not sure why fragments and keys are needed, but otherwise gets the
React key warnings messages and children are rendered as array... */}
<Fragment key="visible">{visibleElement(handleClick)}</Fragment>
<Fragment key="content">
{expanded && (
<div className="dropdown__content">
{typeof children === 'function' ? children(close) : children}
</div>
)}
</Fragment>
</div>
);
};
export default DropdownButton;
|