55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
// Copyright 2018 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import React from 'react';
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import type { RenderTextCallbackType } from '../../types/Util';
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export type Props = {
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text: string;
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/** Allows you to customize now non-newlines are rendered. Simplest is just a <span>. */
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renderNonNewLine?: RenderTextCallbackType;
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};
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const defaultRenderNonNewLine: RenderTextCallbackType = ({ text }) => text;
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export class AddNewLines extends React.Component<Props> {
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public override render():
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| JSX.Element
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| string
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| null
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| Array<JSX.Element | string | null> {
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const { text, renderNonNewLine = defaultRenderNonNewLine } = this.props;
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const results: Array<JSX.Element | string> = [];
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const FIND_NEWLINES = /\n/g;
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let match = FIND_NEWLINES.exec(text);
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let last = 0;
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let count = 1;
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if (!match) {
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return renderNonNewLine({ text, key: 0 });
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}
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while (match) {
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if (last < match.index) {
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const textWithNoNewline = text.slice(last, match.index);
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count += 1;
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results.push(renderNonNewLine({ text: textWithNoNewline, key: count }));
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}
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count += 1;
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results.push(<br key={count} />);
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last = FIND_NEWLINES.lastIndex;
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match = FIND_NEWLINES.exec(text);
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}
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if (last < text.length) {
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count += 1;
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results.push(renderNonNewLine({ text: text.slice(last), key: count }));
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}
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return results;
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}
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}
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