79 lines
2.0 KiB
TypeScript
79 lines
2.0 KiB
TypeScript
// Copyright 2018-2021 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 classNames from 'classnames';
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import type { RenderTextCallbackType } from '../../types/Util';
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import { splitByEmoji } from '../../util/emoji';
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import { missingCaseError } from '../../util/missingCaseError';
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import type { SizeClassType } from '../emoji/lib';
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import { emojiToImage } from '../emoji/lib';
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// Some of this logic taken from emoji-js/replacement
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// the DOM structure for this getImageTag should match the other emoji implementations:
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// ts/components/emoji/Emoji.tsx
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// ts/quill/emoji/blot.tsx
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function getImageTag({
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match,
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sizeClass,
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key,
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}: {
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match: string;
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sizeClass?: SizeClassType;
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key: string | number;
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}): JSX.Element | string {
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const img = emojiToImage(match);
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if (!img) {
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return match;
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}
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return (
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<img
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key={key}
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src={img}
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aria-label={match}
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className={classNames('emoji', sizeClass)}
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alt={match}
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/>
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);
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}
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export type Props = {
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text: string;
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/** A class name to be added to the generated emoji images */
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sizeClass?: SizeClassType;
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/** Allows you to customize now non-newlines are rendered. Simplest is just a <span>. */
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renderNonEmoji?: RenderTextCallbackType;
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};
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export class Emojify extends React.Component<Props> {
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public static defaultProps: Partial<Props> = {
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renderNonEmoji: ({ text }) => text,
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};
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public override render(): null | Array<JSX.Element | string | null> {
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const { text, sizeClass, renderNonEmoji } = this.props;
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// We have to do this, because renderNonEmoji is not required in our Props object,
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// but it is always provided via defaultProps.
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if (!renderNonEmoji) {
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return null;
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}
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return splitByEmoji(text).map(({ type, value: match }, index) => {
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if (type === 'emoji') {
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return getImageTag({ match, sizeClass, key: index });
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}
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if (type === 'text') {
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return renderNonEmoji({ text: match, key: index });
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}
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throw missingCaseError(type);
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});
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}
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}
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