70 lines
1.8 KiB
TypeScript
70 lines
1.8 KiB
TypeScript
// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import React, { useEffect, useRef, useState } from 'react';
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import { Modal } from '../Modal';
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import type { LocalizerType } from '../../types/Util';
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import { GroupDescriptionText } from '../GroupDescriptionText';
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// Emojification can cause the scroll height to be *slightly* larger than the client
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// height, so we add a little wiggle room.
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const SHOW_READ_MORE_THRESHOLD = 5;
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export type PropsType = {
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i18n: LocalizerType;
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title: string;
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text: string;
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};
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export const GroupDescription = ({
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i18n,
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title,
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text,
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}: PropsType): JSX.Element => {
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const textRef = useRef<HTMLDivElement | null>(null);
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const [hasReadMore, setHasReadMore] = useState(false);
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const [showFullDescription, setShowFullDescription] = useState(false);
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useEffect(() => {
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if (!textRef || !textRef.current) {
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return;
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}
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setHasReadMore(
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textRef.current.scrollHeight - SHOW_READ_MORE_THRESHOLD >
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textRef.current.clientHeight
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);
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}, [setHasReadMore, text, textRef]);
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return (
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<>
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{showFullDescription && (
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<Modal
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hasXButton
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i18n={i18n}
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onClose={() => setShowFullDescription(false)}
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title={title}
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>
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<GroupDescriptionText text={text} />
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</Modal>
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)}
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<div className="GroupDescription__text" ref={textRef}>
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<GroupDescriptionText text={text} />
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</div>
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{hasReadMore && (
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<button
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className="GroupDescription__read-more"
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onClick={ev => {
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ev.preventDefault();
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ev.stopPropagation();
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setShowFullDescription(true);
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}}
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type="button"
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>
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{i18n('GroupDescription__read-more')}
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</button>
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)}
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</>
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);
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};
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