55 lines
1.5 KiB
TypeScript
55 lines
1.5 KiB
TypeScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
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import { useLexicalTextEntity } from '@lexical/react/useLexicalTextEntity';
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import { useCallback, useEffect } from 'react';
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import { $createMentionNode, MentionNode } from '../nodes/mention-node';
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import type { TextNode } from 'lexical';
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const REGEX = new RegExp('(^|$|(?:^|\\s))([@])([a-z\\d_-]+(?:@[^@\\s]+)?)', 'i');
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export function MentionPlugin(): JSX.Element | null {
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const [editor] = useLexicalComposerContext();
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useEffect(() => {
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if (!editor.hasNodes([MentionNode])) {
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throw new Error('MentionPlugin: MentionNode not registered on editor');
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}
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}, [editor]);
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const createMentionNode = useCallback((textNode: TextNode): MentionNode => {
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return $createMentionNode(textNode.getTextContent());
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}, []);
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const getMentionMatch = useCallback((text: string) => {
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const matchArr = REGEX.exec(text);
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if (matchArr === null) {
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return null;
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}
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const mentionLength = matchArr[3].length + 1;
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const startOffset = matchArr.index + matchArr[1].length;
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const endOffset = startOffset + mentionLength;
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return {
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end: endOffset,
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start: startOffset,
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};
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}, []);
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useLexicalTextEntity<MentionNode>(
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getMentionMatch,
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MentionNode,
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createMentionNode,
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);
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return null;
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}
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