56 lines
1.4 KiB
TypeScript
56 lines
1.4 KiB
TypeScript
import React from 'react';
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import { RenderTextCallback } from '../../types/Util';
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interface 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?: RenderTextCallback;
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}
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export class AddNewLines extends React.Component<Props> {
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public static defaultProps: Partial<Props> = {
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renderNonNewLine: ({ text }) => text,
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};
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public render() {
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const { text, renderNonNewLine } = this.props;
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const results: Array<any> = [];
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const FIND_NEWLINES = /\n/g;
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// We have to do this, because renderNonNewLine is not required in our Props object,
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// but it is always provided via defaultProps.
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if (!renderNonNewLine) {
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return;
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}
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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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results.push(
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renderNonNewLine({ text: textWithNoNewline, key: count++ })
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);
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}
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results.push(<br key={count++} />);
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// @ts-ignore
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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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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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