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Improve performance of isEmojiOnlyText

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Fedor Indutny 2022-01-27 13:28:04 -08:00 • committed by GitHub
parent 8fa4cd68d5
commit 6578679166
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2 changed files with 45 additions and 4 deletions
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21
ts/util/isEmojiOnlyText.tsx
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@ -1,9 +1,22 @@
// Copyright 2021 Signal Messenger, LLC
// Copyright 2021-2022 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
import * as grapheme from './grapheme';
import { getEmojiCount } from '../components/emoji/lib';
import emojiRegex from 'emoji-regex';
export function isEmojiOnlyText(text: string): boolean {
return grapheme.count(text) === getEmojiCount(text);
if (text.length === 0) {
return false;
}
const regex = emojiRegex();
let len = 0;
for (const match of text.matchAll(regex)) {
// Skipped some non-emoji text, return early
if (match.index !== len) {
return false;
}
len += match[0].length;
}
return len === text.length;
}