chinwagsocial/app/javascript/mastodon/components/media_gallery.js

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import React from 'react';
import ImmutablePropTypes from 'react-immutable-proptypes';
import PropTypes from 'prop-types';
import { is } from 'immutable';
import IconButton from './icon_button';
import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
import { isIOS } from '../is_mobile';
import classNames from 'classnames';
import { autoPlayGif, displaySensitiveMedia } from '../initial_state';
const messages = defineMessages({
toggle_visible: { id: 'media_gallery.toggle_visible', defaultMessage: 'Toggle visibility' },
});
const shiftToPoint = (containerToImageRatio, containerSize, imageSize, focusSize, toMinus) => {
const containerCenter = Math.floor(containerSize / 2);
const focusFactor = (focusSize + 1) / 2;
const scaledImage = Math.floor(imageSize / containerToImageRatio);
let focus = Math.floor(focusFactor * scaledImage);
if (toMinus) focus = scaledImage - focus;
let focusOffset = focus - containerCenter;
const remainder = scaledImage - focus;
const containerRemainder = containerSize - containerCenter;
if (remainder < containerRemainder) focusOffset -= containerRemainder - remainder;
if (focusOffset < 0) focusOffset = 0;
return (focusOffset * -100 / containerSize) + '%';
};
class Item extends React.PureComponent {
static contextTypes = {
router: PropTypes.object,
};
static propTypes = {
attachment: ImmutablePropTypes.map.isRequired,
standalone: PropTypes.bool,
index: PropTypes.number.isRequired,
size: PropTypes.number.isRequired,
onClick: PropTypes.func.isRequired,
containerWidth: PropTypes.number,
containerHeight: PropTypes.number,
};
static defaultProps = {
standalone: false,
index: 0,
size: 1,
};
handleMouseEnter = (e) => {
if (this.hoverToPlay()) {
e.target.play();
}
}
handleMouseLeave = (e) => {
if (this.hoverToPlay()) {
e.target.pause();
e.target.currentTime = 0;
}
}
hoverToPlay () {
const { attachment } = this.props;
return !autoPlayGif && attachment.get('type') === 'gifv';
}
handleClick = (e) => {
const { index, onClick } = this.props;
if (this.context.router && e.button === 0) {
e.preventDefault();
onClick(index);
}
e.stopPropagation();
}
render () {
const { attachment, index, size, standalone, containerWidth, containerHeight } = this.props;
let width = 50;
let height = 100;
let top = 'auto';
let left = 'auto';
let bottom = 'auto';
let right = 'auto';
if (size === 1) {
width = 100;
}
if (size === 4 || (size === 3 && index > 0)) {
height = 50;
}
if (size === 2) {
if (index === 0) {
right = '2px';
} else {
left = '2px';
}
} else if (size === 3) {
if (index === 0) {
right = '2px';
} else if (index > 0) {
left = '2px';
}
if (index === 1) {
bottom = '2px';
} else if (index > 1) {
top = '2px';
}
} else if (size === 4) {
if (index === 0 || index === 2) {
right = '2px';
}
if (index === 1 || index === 3) {
left = '2px';
}
if (index < 2) {
bottom = '2px';
} else {
top = '2px';
}
}
let thumbnail = '';
if (attachment.get('type') === 'image') {
const previewUrl = attachment.get('preview_url');
const previewWidth = attachment.getIn(['meta', 'small', 'width']);
const originalUrl = attachment.get('url');
const originalWidth = attachment.getIn(['meta', 'original', 'width']);
const originalHeight = attachment.getIn(['meta', 'original', 'height']);
const hasSize = typeof originalWidth === 'number' && typeof previewWidth === 'number';
const srcSet = hasSize ? `${originalUrl} ${originalWidth}w, ${previewUrl} ${previewWidth}w` : null;
const sizes = hasSize ? `(min-width: 1025px) ${320 * (width / 100)}px, ${width}vw` : null;
const focusX = attachment.getIn(['meta', 'focus', 'x']);
const focusY = attachment.getIn(['meta', 'focus', 'y']);
const imageStyle = {};
if (originalWidth && originalHeight && containerWidth && containerHeight && focusX && focusY) {
const widthRatio = originalWidth / (containerWidth * (width / 100));
const heightRatio = originalHeight / (containerHeight * (height / 100));
let hShift = 0;
let vShift = 0;
if (widthRatio > heightRatio) {
hShift = shiftToPoint(heightRatio, (containerWidth * (width / 100)), originalWidth, focusX);
} else if(widthRatio < heightRatio) {
vShift = shiftToPoint(widthRatio, (containerHeight * (height / 100)), originalHeight, focusY, true);
}
imageStyle.top = vShift;
imageStyle.left = hShift;
} else {
imageStyle.height = '100%';
}
thumbnail = (
<a
className='media-gallery__item-thumbnail'
href={attachment.get('remote_url') || originalUrl}
onClick={this.handleClick}
target='_blank'
>
<img
src={previewUrl}
srcSet={srcSet}
sizes={sizes}
alt={attachment.get('description')}
title={attachment.get('description')}
style={imageStyle}
/>
</a>
);
} else if (attachment.get('type') === 'gifv') {
const autoPlay = !isIOS() && autoPlayGif;
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thumbnail = (
<div className={classNames('media-gallery__gifv', { autoplay: autoPlay })}>
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<video
className='media-gallery__item-gifv-thumbnail'
aria-label={attachment.get('description')}
role='application'
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src={attachment.get('url')}
onClick={this.handleClick}
onMouseEnter={this.handleMouseEnter}
onMouseLeave={this.handleMouseLeave}
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autoPlay={autoPlay}
loop
muted
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/>
<span className='media-gallery__gifv__label'>GIF</span>
</div>
);
}
return (
<div className={classNames('media-gallery__item', { standalone })} key={attachment.get('id')} style={{ left: left, top: top, right: right, bottom: bottom, width: `${width}%`, height: `${height}%` }}>
{thumbnail}
</div>
);
}
}
@injectIntl
export default class MediaGallery extends React.PureComponent {
static propTypes = {
sensitive: PropTypes.bool,
standalone: PropTypes.bool,
media: ImmutablePropTypes.list.isRequired,
size: PropTypes.object,
height: PropTypes.number.isRequired,
onOpenMedia: PropTypes.func.isRequired,
intl: PropTypes.object.isRequired,
};
static defaultProps = {
standalone: false,
};
state = {
visible: !this.props.sensitive || displaySensitiveMedia,
};
componentWillReceiveProps (nextProps) {
if (!is(nextProps.media, this.props.media)) {
this.setState({ visible: !nextProps.sensitive });
}
}
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handleOpen = () => {
this.setState({ visible: !this.state.visible });
}
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handleClick = (index) => {
this.props.onOpenMedia(this.props.media, index);
}
handleRef = (node) => {
if (node /*&& this.isStandaloneEligible()*/) {
// offsetWidth triggers a layout, so only calculate when we need to
this.setState({
width: node.offsetWidth,
});
}
}
isStandaloneEligible() {
const { media, standalone } = this.props;
return standalone && media.size === 1 && media.getIn([0, 'meta', 'small', 'aspect']);
}
render () {
const { media, intl, sensitive, height } = this.props;
const { width, visible } = this.state;
let children;
const style = {};
if (this.isStandaloneEligible()) {
if (width) {
style.height = width / this.props.media.getIn([0, 'meta', 'small', 'aspect']);
}
} else if (width) {
style.height = width / (16/9);
} else {
style.height = height;
}
if (!visible) {
let warning;
if (sensitive) {
warning = <FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' />;
} else {
warning = <FormattedMessage id='status.media_hidden' defaultMessage='Media hidden' />;
}
children = (
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<button type='button' className='media-spoiler' onClick={this.handleOpen} style={style} ref={this.handleRef}>
<span className='media-spoiler__warning'>{warning}</span>
<span className='media-spoiler__trigger'><FormattedMessage id='status.sensitive_toggle' defaultMessage='Click to view' /></span>
</button>
);
} else {
const size = media.take(4).size;
if (this.isStandaloneEligible()) {
children = <Item standalone onClick={this.handleClick} attachment={media.get(0)} />;
} else {
children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} onClick={this.handleClick} attachment={attachment} index={i} size={size} containerWidth={width} containerHeight={style.height} />);
}
}
return (
<div className='media-gallery' style={style} ref={this.handleRef}>
<div className={classNames('spoiler-button', { 'spoiler-button--visible': visible })}>
<IconButton title={intl.formatMessage(messages.toggle_visible)} icon={visible ? 'eye' : 'eye-slash'} overlay onClick={this.handleOpen} />
</div>
{children}
</div>
);
}
}