74 lines
1.7 KiB
TypeScript
74 lines
1.7 KiB
TypeScript
// Copyright 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 type { Props as MessageBodyPropsType } from './MessageBody';
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import { MessageBody } from './MessageBody';
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import { graphemeAndLinkAwareSlice } from '../../util/graphemeAndLinkAwareSlice';
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export type Props = Pick<
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MessageBodyPropsType,
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| 'bodyRanges'
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| 'direction'
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| 'disableLinks'
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| 'i18n'
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| 'kickOffBodyDownload'
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| 'showConversation'
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| 'text'
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| 'textAttachment'
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> & {
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id: string;
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displayLimit?: number;
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messageExpanded: (id: string, displayLimit: number) => unknown;
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};
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const INITIAL_LENGTH = 800;
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const INCREMENT_COUNT = 3000;
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const BUFFER = 100;
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export function doesMessageBodyOverflow(str: string): boolean {
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return str.length > INITIAL_LENGTH + BUFFER;
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}
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export function MessageBodyReadMore({
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bodyRanges,
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direction,
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disableLinks,
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displayLimit,
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i18n,
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id,
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kickOffBodyDownload,
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messageExpanded,
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showConversation,
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text,
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textAttachment,
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}: Props): JSX.Element {
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const maxLength = displayLimit || INITIAL_LENGTH;
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const { hasReadMore, text: slicedText } = graphemeAndLinkAwareSlice(
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text,
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maxLength,
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BUFFER
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);
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const onIncreaseTextLength = hasReadMore
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? () => {
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messageExpanded(id, maxLength + INCREMENT_COUNT);
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}
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: undefined;
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return (
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<MessageBody
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bodyRanges={bodyRanges}
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direction={direction}
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disableLinks={disableLinks}
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i18n={i18n}
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kickOffBodyDownload={kickOffBodyDownload}
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onIncreaseTextLength={onIncreaseTextLength}
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showConversation={showConversation}
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text={slicedText}
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textAttachment={textAttachment}
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/>
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);
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}
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