manifold/web/components/editor/mention-list.tsx

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import { SuggestionProps } from '@tiptap/suggestion'
import clsx from 'clsx'
import { User } from 'common/user'
import { forwardRef, useEffect, useImperativeHandle, useState } from 'react'
import { Avatar } from '../avatar'
// copied from https://tiptap.dev/api/nodes/mention#usage
export const MentionList = forwardRef((props: SuggestionProps<User>, ref) => {
const { items: users, command } = props
const [selectedIndex, setSelectedIndex] = useState(0)
useEffect(() => setSelectedIndex(0), [users])
const submitUser = (index: number) => {
const user = users[index]
if (user) command({ id: user.id, label: user.username } as any)
}
const onUp = () =>
setSelectedIndex((i) => (i + users.length - 1) % users.length)
const onDown = () => setSelectedIndex((i) => (i + 1) % users.length)
const onEnter = () => submitUser(selectedIndex)
useImperativeHandle(ref, () => ({
onKeyDown: ({ event }: any) => {
if (event.key === 'ArrowUp') {
onUp()
return true
}
if (event.key === 'ArrowDown') {
onDown()
return true
}
if (event.key === 'Enter') {
onEnter()
return true
}
return false
},
}))
return (
<div className="w-42 absolute z-10 overflow-x-hidden rounded-md bg-white py-1 shadow-lg ring-1 ring-black ring-opacity-5 focus:outline-none">
{!users.length ? (
<span className="m-1 whitespace-nowrap">No results...</span>
) : (
users.map((user, i) => (
<button
className={clsx(
'flex h-8 w-full cursor-pointer select-none items-center gap-2 truncate px-4',
selectedIndex === i ? 'bg-indigo-500 text-white' : 'text-gray-900'
)}
onClick={() => submitUser(i)}
>
<Avatar avatarUrl={user.avatarUrl} size="xs" />
{user.username}
</button>
))
)}
</div>
)
})