hometown/app/javascript/mastodon/features/status/components/card.js

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JavaScript
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import React from 'react';
import PropTypes from 'prop-types';
import Immutable from 'immutable';
import ImmutablePropTypes from 'react-immutable-proptypes';
import punycode from 'punycode';
import classnames from 'classnames';
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const IDNA_PREFIX = 'xn--';
const decodeIDNA = domain => {
return domain
.split('.')
.map(part => part.indexOf(IDNA_PREFIX) === 0 ? punycode.decode(part.slice(IDNA_PREFIX.length)) : part)
.join('.');
};
const getHostname = url => {
const parser = document.createElement('a');
parser.href = url;
return parser.hostname;
};
const trim = (text, len) => {
const cut = text.indexOf(' ', len);
if (cut === -1) {
return text;
}
return text.substring(0, cut) + (text.length > len ? '…' : '');
};
const domParser = new DOMParser();
const addAutoPlay = html => {
const document = domParser.parseFromString(html, 'text/html').documentElement;
const iframe = document.querySelector('iframe');
if (iframe) {
if (iframe.src.indexOf('?') !== -1) {
iframe.src += '&';
} else {
iframe.src += '?';
}
iframe.src += 'autoplay=1&auto_play=1';
// DOM parser creates html/body elements around original HTML fragment,
// so we need to get innerHTML out of the body and not the entire document
return document.querySelector('body').innerHTML;
}
return html;
};
export default class Card extends React.PureComponent {
static propTypes = {
card: ImmutablePropTypes.map,
maxDescription: PropTypes.number,
onOpenMedia: PropTypes.func.isRequired,
};
static defaultProps = {
maxDescription: 50,
};
state = {
width: 280,
embedded: false,
};
componentWillReceiveProps (nextProps) {
if (this.props.card !== nextProps.card) {
this.setState({ embedded: false });
}
}
handlePhotoClick = () => {
const { card, onOpenMedia } = this.props;
onOpenMedia(
Immutable.fromJS([
{
type: 'image',
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url: card.get('embed_url'),
description: card.get('title'),
meta: {
original: {
width: card.get('width'),
height: card.get('height'),
},
},
},
]),
0
);
};
handleEmbedClick = () => {
const { card } = this.props;
if (card.get('type') === 'photo') {
this.handlePhotoClick();
} else {
this.setState({ embedded: true });
}
}
setRef = c => {
if (c) {
this.setState({ width: c.offsetWidth });
}
}
renderVideo () {
const { card } = this.props;
const content = { __html: addAutoPlay(card.get('html')) };
const { width } = this.state;
const ratio = card.get('width') / card.get('height');
const height = card.get('width') > card.get('height') ? (width / ratio) : (width * ratio);
return (
<div
ref={this.setRef}
className='status-card__image status-card-video'
dangerouslySetInnerHTML={content}
style={{ height }}
/>
);
}
render () {
const { card, maxDescription } = this.props;
const { width, embedded } = this.state;
if (card === null) {
return null;
}
const provider = card.get('provider_name').length === 0 ? decodeIDNA(getHostname(card.get('url'))) : card.get('provider_name');
const horizontal = card.get('width') > card.get('height') && (card.get('width') + 100 >= width) || card.get('type') !== 'link';
const className = classnames('status-card', { horizontal });
const interactive = card.get('type') !== 'link';
const title = interactive ? <a className='status-card__title' href={card.get('url')} title={card.get('title')} rel='noopener' target='_blank'><strong>{card.get('title')}</strong></a> : <strong className='status-card__title' title={card.get('title')}>{card.get('title')}</strong>;
const ratio = card.get('width') / card.get('height');
const height = card.get('width') > card.get('height') ? (width / ratio) : (width * ratio);
const description = (
<div className='status-card__content'>
{title}
{!horizontal && <p className='status-card__description'>{trim(card.get('description') || '', maxDescription)}</p>}
<span className='status-card__host'>{provider}</span>
</div>
);
let embed = '';
let thumbnail = <div style={{ backgroundImage: `url(${card.get('image')})`, width: horizontal ? width : null, height: horizontal ? height : null }} className='status-card__image-image' />;
if (interactive) {
if (embedded) {
embed = this.renderVideo();
} else {
let iconVariant = 'play';
if (card.get('type') === 'photo') {
iconVariant = 'search-plus';
}
embed = (
<div className='status-card__image'>
{thumbnail}
<div className='status-card__actions'>
<div>
<button onClick={this.handleEmbedClick}><i className={`fa fa-${iconVariant}`} /></button>
<a href={card.get('url')} target='_blank' rel='noopener'><i className='fa fa-external-link' /></a>
</div>
</div>
</div>
);
}
return (
<div className={className} ref={this.setRef}>
{embed}
{description}
</div>
);
} else if (card.get('image')) {
embed = (
<div className='status-card__image'>
{thumbnail}
</div>
);
}
return (
<a href={card.get('url')} className={className} target='_blank' rel='noopener' ref={this.setRef}>
{embed}
{description}
</a>
);
}
}