| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | */ |
| 7 | |
| 8 | import type {CommitInfo, Hash} from './types'; |
| 9 | |
| 10 | import {atom, useSetAtom} from 'jotai'; |
| 11 | import {useEffect, useState} from 'react'; |
| 12 | import {atomFamilyWeak} from './jotaiUtils'; |
| 13 | |
| 14 | export const highlightedCommits = atom<Set<Hash>>(new Set<Hash>()); |
| 15 | |
| 16 | export const isHighlightedCommit = atomFamilyWeak((hash: Hash) => |
| 17 | atom(get => get(highlightedCommits).has(hash)), |
| 18 | ); |
| 19 | |
| 20 | export function HighlightCommitsWhileHovering({ |
| 21 | toHighlight, |
| 22 | children, |
| 23 | ...rest |
| 24 | }: { |
| 25 | toHighlight: Array<CommitInfo | Hash>; |
| 26 | children: React.ReactNode; |
| 27 | } & React.DetailedHTMLProps<React.HTMLAttributes<HTMLDivElement>, HTMLDivElement>) { |
| 28 | const setHighlighted = useSetAtom(highlightedCommits); |
| 29 | const [isSourceOfHighlight, setIsSourceOfHighlight] = useState(false); |
| 30 | |
| 31 | useEffect(() => { |
| 32 | return () => { |
| 33 | if (isSourceOfHighlight) { |
| 34 | // if we started the highlight, make sure to unhighlight when unmounting |
| 35 | setHighlighted(new Set()); |
| 36 | } |
| 37 | }; |
| 38 | }, [isSourceOfHighlight, setHighlighted]); |
| 39 | |
| 40 | return ( |
| 41 | <div |
| 42 | {...rest} |
| 43 | onMouseOver={() => { |
| 44 | setHighlighted( |
| 45 | new Set( |
| 46 | toHighlight.map(commitOrHash => |
| 47 | typeof commitOrHash === 'string' ? commitOrHash : commitOrHash.hash, |
| 48 | ), |
| 49 | ), |
| 50 | ); |
| 51 | setIsSourceOfHighlight(true); |
| 52 | }} |
| 53 | onMouseOut={() => { |
| 54 | setHighlighted(new Set()); |
| 55 | setIsSourceOfHighlight(false); |
| 56 | }}> |
| 57 | {children} |
| 58 | </div> |
| 59 | ); |
| 60 | } |
| 61 | |