75 lines
2.1 KiB
JavaScript
75 lines
2.1 KiB
JavaScript
// @flow
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import { useCallback, useRef, useState } from 'react';
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import { findAncestorByClass } from '../../../participants-pane/functions';
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type RaiseContext = {|
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/**
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* Target elements against which positioning calculations are made.
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*/
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offsetTarget?: HTMLElement,
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/**
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* The entity for which the menu is context menu is raised.
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*/
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entity?: string | Object,
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|};
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const initialState = Object.freeze({});
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const useContextMenu = () => {
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const [ raiseContext, setRaiseContext ] = useState < RaiseContext >(initialState);
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const isMouseOverMenu = useRef(false);
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const lowerMenu = useCallback((force: boolean | Object = false) => {
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/**
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* We are tracking mouse movement over the active participant item and
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* the context menu. Due to the order of enter/leave events, we need to
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* defer checking if the mouse is over the context menu with
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* queueMicrotask.
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*/
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window.queueMicrotask(() => {
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if (isMouseOverMenu.current && !(force === true)) {
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return;
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}
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if (raiseContext !== initialState) {
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setRaiseContext(initialState);
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}
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});
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}, [ raiseContext ]);
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const raiseMenu = useCallback((entity: string | Object, target: EventTarget) => {
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setRaiseContext({
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entity,
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offsetTarget: findAncestorByClass(target, 'list-item-container')
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});
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}, [ raiseContext ]);
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const toggleMenu = useCallback((entity: string | Object) => (e: MouseEvent) => {
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e.stopPropagation();
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const { entity: raisedEntity } = raiseContext;
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if (raisedEntity && raisedEntity === entity) {
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lowerMenu();
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} else {
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raiseMenu(entity, e.target);
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}
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}, [ raiseContext ]);
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const menuEnter = useCallback(() => {
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isMouseOverMenu.current = true;
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}, []);
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const menuLeave = useCallback(() => {
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isMouseOverMenu.current = false;
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lowerMenu();
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}, [ lowerMenu ]);
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return [ lowerMenu, raiseMenu, toggleMenu, menuEnter, menuLeave, raiseContext ];
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};
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export default useContextMenu;
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