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usePopper.ts
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usePopper.ts
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import React from 'react';
import type popper from '@popperjs/core';
import {usePopper as useReactPopper} from 'react-popper';
import type {Modifier} from 'react-popper';
import {useDirection} from '../../../components/theme';
export type PopperPlacement = popper.Placement | popper.Placement[];
export type PopperOffset = [number, number];
export type PopperModifiers = Modifier<unknown, Record<string, unknown>>[];
export type PopperAnchorRef = React.RefObject<Element | popper.VirtualElement>;
export interface PopperProps {
anchorRef?: PopperAnchorRef;
placement?: PopperPlacement;
offset?: [number, number];
modifiers?: PopperModifiers;
strategy?: popper.PositioningStrategy;
altBoundary?: boolean;
}
export interface UsePopperProps extends PopperProps {}
export interface UsePopperResult {
attributes: {
[key: string]:
| {
[key: string]: string;
}
| undefined;
};
styles: {
[key: string]: React.CSSProperties;
};
setPopperRef: React.Dispatch<React.SetStateAction<HTMLElement | null>>;
setArrowRef: React.Dispatch<React.SetStateAction<HTMLElement | null>>;
}
const DEFAULT_PLACEMENT: PopperPlacement = [
'bottom-start',
'bottom',
'bottom-end',
'top-start',
'top',
'top-end',
'right-start',
'right',
'right-end',
'left-start',
'left',
'left-end',
];
const rtlOffsetFix: popper.Modifier<'rtlOffsetFix', {}> = {
name: 'rtlOffsetFix',
enabled: true,
phase: 'main',
requires: ['offset'],
fn({state}) {
if (!state.placement.startsWith('top') && !state.placement.startsWith('bottom')) {
return;
}
const offsets = state.modifiersData.offset?.[state.placement];
if (!offsets) {
return;
}
state.modifiersData.popperOffsets!.x -= offsets.x * 2;
},
};
export function usePopper({
anchorRef,
placement = DEFAULT_PLACEMENT,
offset,
modifiers = [],
strategy,
altBoundary,
}: UsePopperProps): UsePopperResult {
const [popperElement, setPopperElement] = React.useState<HTMLElement | null>(null);
const [arrowElement, setArrowElement] = React.useState<HTMLElement | null>(null);
const direction = useDirection();
const placements = React.useMemo(() => {
let items = Array.isArray(placement) ? placement : [placement];
if (direction === 'rtl') {
items = items.map(
(p) =>
p.replace(/(top|bottom)-(start|end)/g, (match, position, value) => {
if (value === 'start') {
return position + '-end';
}
if (value === 'end') {
return position + '-start';
}
return match;
}) as popper.Placement,
);
}
return items;
}, [placement, direction]);
const {attributes, styles} = useReactPopper(anchorRef?.current, popperElement, {
strategy,
modifiers: [
{name: 'arrow', options: {element: arrowElement}},
{name: 'offset', options: {offset, altBoundary}},
{name: 'flip', options: {fallbackPlacements: placements.slice(1), altBoundary}},
...(direction === 'rtl' ? [rtlOffsetFix] : []),
...modifiers,
],
placement: placements[0],
});
return {
attributes,
styles,
setPopperRef: setPopperElement,
setArrowRef: setArrowElement,
};
}