35 lines
650 B
TypeScript
35 lines
650 B
TypeScript
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// Copyright 2021-2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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export function graphemeAwareSlice(
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str: string,
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length: number,
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buffer = 100
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): {
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hasReadMore: boolean;
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text: string;
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} {
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if (str.length <= length + buffer) {
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return { text: str, hasReadMore: false };
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}
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let text: string | undefined;
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for (const { index } of new Intl.Segmenter().segment(str)) {
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if (!text && index >= length) {
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text = str.slice(0, index);
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}
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if (text && index > length) {
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return {
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text,
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hasReadMore: true,
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};
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}
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}
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return {
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text: str,
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hasReadMore: false,
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};
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}
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