112 lines
2.7 KiB
TypeScript
112 lines
2.7 KiB
TypeScript
// Copyright 2018-2020 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 * as MIME from '../types/MIME';
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import { Lightbox } from './Lightbox';
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import { Message } from './conversation/media-gallery/types/Message';
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import { AttachmentType } from '../types/Attachment';
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import { LocalizerType } from '../types/Util';
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export type MediaItemType = {
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objectURL?: string;
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thumbnailObjectUrl?: string;
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contentType?: MIME.MIMEType;
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index: number;
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attachment: AttachmentType;
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message: Message;
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};
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export type Props = {
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close: () => void;
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i18n: LocalizerType;
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media: Array<MediaItemType>;
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onSave?: (options: {
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attachment: AttachmentType;
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message: Message;
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index: number;
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}) => void;
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selectedIndex: number;
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};
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type State = {
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selectedIndex: number;
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};
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export class LightboxGallery extends React.Component<Props, State> {
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public static defaultProps: Partial<Props> = {
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selectedIndex: 0,
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};
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constructor(props: Props) {
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super(props);
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this.state = {
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selectedIndex: props.selectedIndex,
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};
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}
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public render(): JSX.Element {
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const { close, media, onSave, i18n } = this.props;
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const { selectedIndex } = this.state;
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const selectedMedia = media[selectedIndex];
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const firstIndex = 0;
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const lastIndex = media.length - 1;
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const onPrevious =
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selectedIndex > firstIndex ? this.handlePrevious : undefined;
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const onNext = selectedIndex < lastIndex ? this.handleNext : undefined;
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const objectURL =
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selectedMedia.objectURL || 'images/full-screen-flow/alert-outline.svg';
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const { attachment } = selectedMedia;
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const saveCallback = onSave ? this.handleSave : undefined;
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const captionCallback = attachment ? attachment.caption : undefined;
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return (
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<Lightbox
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caption={captionCallback}
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close={close}
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contentType={selectedMedia.contentType}
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i18n={i18n}
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isViewOnce={false}
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objectURL={objectURL}
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onNext={onNext}
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onPrevious={onPrevious}
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onSave={saveCallback}
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/>
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);
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}
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private readonly handlePrevious = () => {
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this.setState(prevState => ({
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selectedIndex: Math.max(prevState.selectedIndex - 1, 0),
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}));
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};
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private readonly handleNext = () => {
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this.setState((prevState, props) => ({
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selectedIndex: Math.min(
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prevState.selectedIndex + 1,
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props.media.length - 1
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),
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}));
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};
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private readonly handleSave = () => {
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const { media, onSave } = this.props;
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if (!onSave) {
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return;
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}
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const { selectedIndex } = this.state;
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const mediaItem = media[selectedIndex];
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const { attachment, message, index } = mediaItem;
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onSave({ attachment, message, index });
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};
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}
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