hometown/app/javascript/mastodon/features/ui/components/focal_point_modal.js

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import React from 'react';
import ImmutablePropTypes from 'react-immutable-proptypes';
import PropTypes from 'prop-types';
import ImmutablePureComponent from 'react-immutable-pure-component';
import { connect } from 'react-redux';
import classNames from 'classnames';
import { changeUploadCompose } from '../../../actions/compose';
import { getPointerPosition } from '../../video';
import { FormattedMessage, defineMessages, injectIntl } from 'react-intl';
import IconButton from 'mastodon/components/icon_button';
import Button from 'mastodon/components/button';
import Video from 'mastodon/features/video';
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import Audio from 'mastodon/features/audio';
import Textarea from 'react-textarea-autosize';
import UploadProgress from 'mastodon/features/compose/components/upload_progress';
import CharacterCounter from 'mastodon/features/compose/components/character_counter';
import { length } from 'stringz';
import { Tesseract as fetchTesseract } from 'mastodon/features/ui/util/async-components';
import GIFV from 'mastodon/components/gifv';
const messages = defineMessages({
close: { id: 'lightbox.close', defaultMessage: 'Close' },
apply: { id: 'upload_modal.apply', defaultMessage: 'Apply' },
placeholder: { id: 'upload_modal.description_placeholder', defaultMessage: 'A quick brown fox jumps over the lazy dog' },
});
const mapStateToProps = (state, { id }) => ({
media: state.getIn(['compose', 'media_attachments']).find(item => item.get('id') === id),
});
const mapDispatchToProps = (dispatch, { id }) => ({
onSave: (description, x, y) => {
dispatch(changeUploadCompose(id, { description, focus: `${x.toFixed(2)},${y.toFixed(2)}` }));
},
});
const removeExtraLineBreaks = str => str.replace(/\n\n/g, '******')
.replace(/\n/g, ' ')
.replace(/\*\*\*\*\*\*/g, '\n\n');
const assetHost = process.env.CDN_HOST || '';
class ImageLoader extends React.PureComponent {
static propTypes = {
src: PropTypes.string.isRequired,
width: PropTypes.number,
height: PropTypes.number,
};
state = {
loading: true,
};
componentDidMount() {
const image = new Image();
image.addEventListener('load', () => this.setState({ loading: false }));
image.src = this.props.src;
}
render () {
const { loading } = this.state;
if (loading) {
return <canvas width={this.props.width} height={this.props.height} />;
} else {
return <img {...this.props} alt='' />;
}
}
}
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export default @connect(mapStateToProps, mapDispatchToProps)
@injectIntl
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class FocalPointModal extends ImmutablePureComponent {
static propTypes = {
media: ImmutablePropTypes.map.isRequired,
onClose: PropTypes.func.isRequired,
intl: PropTypes.object.isRequired,
};
state = {
x: 0,
y: 0,
focusX: 0,
focusY: 0,
dragging: false,
description: '',
dirty: false,
progress: 0,
loading: true,
};
componentWillMount () {
this.updatePositionFromMedia(this.props.media);
}
componentWillReceiveProps (nextProps) {
if (this.props.media.get('id') !== nextProps.media.get('id')) {
this.updatePositionFromMedia(nextProps.media);
}
}
componentWillUnmount () {
document.removeEventListener('mousemove', this.handleMouseMove);
document.removeEventListener('mouseup', this.handleMouseUp);
}
handleMouseDown = e => {
document.addEventListener('mousemove', this.handleMouseMove);
document.addEventListener('mouseup', this.handleMouseUp);
this.updatePosition(e);
this.setState({ dragging: true });
}
handleTouchStart = e => {
document.addEventListener('touchmove', this.handleMouseMove);
document.addEventListener('touchend', this.handleTouchEnd);
this.updatePosition(e);
this.setState({ dragging: true });
}
handleMouseMove = e => {
this.updatePosition(e);
}
handleMouseUp = () => {
document.removeEventListener('mousemove', this.handleMouseMove);
document.removeEventListener('mouseup', this.handleMouseUp);
this.setState({ dragging: false });
}
handleTouchEnd = () => {
document.removeEventListener('touchmove', this.handleMouseMove);
document.removeEventListener('touchend', this.handleTouchEnd);
this.setState({ dragging: false });
}
updatePosition = e => {
const { x, y } = getPointerPosition(this.node, e);
const focusX = (x - .5) * 2;
const focusY = (y - .5) * -2;
this.setState({ x, y, focusX, focusY, dirty: true });
}
updatePositionFromMedia = media => {
const focusX = media.getIn(['meta', 'focus', 'x']);
const focusY = media.getIn(['meta', 'focus', 'y']);
const description = media.get('description') || '';
if (focusX && focusY) {
const x = (focusX / 2) + .5;
const y = (focusY / -2) + .5;
this.setState({
x,
y,
focusX,
focusY,
description,
dirty: false,
});
} else {
this.setState({
x: 0.5,
y: 0.5,
focusX: 0,
focusY: 0,
description,
dirty: false,
});
}
}
handleChange = e => {
this.setState({ description: e.target.value, dirty: true });
}
handleKeyDown = (e) => {
if (e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
e.preventDefault();
e.stopPropagation();
this.setState({ description: e.target.value, dirty: true });
this.handleSubmit();
}
}
handleSubmit = () => {
this.props.onSave(this.state.description, this.state.focusX, this.state.focusY);
this.props.onClose();
}
setRef = c => {
this.node = c;
}
handleTextDetection = () => {
const { media } = this.props;
this.setState({ detecting: true });
fetchTesseract().then(({ TesseractWorker }) => {
const worker = new TesseractWorker({
workerPath: `${assetHost}/packs/ocr/worker.min.js`,
corePath: `${assetHost}/packs/ocr/tesseract-core.wasm.js`,
langPath: `${assetHost}/ocr/lang-data`,
});
let media_url = media.get('file');
if (window.URL && URL.createObjectURL) {
try {
media_url = URL.createObjectURL(media.get('file'));
} catch (error) {
console.error(error);
}
}
worker.recognize(media_url)
.progress(({ progress }) => this.setState({ progress }))
.finally(() => worker.terminate())
.then(({ text }) => this.setState({ description: removeExtraLineBreaks(text), dirty: true, detecting: false }))
.catch(() => this.setState({ detecting: false }));
}).catch(() => this.setState({ detecting: false }));
}
render () {
const { media, intl, onClose } = this.props;
const { x, y, dragging, description, dirty, detecting, progress } = this.state;
const width = media.getIn(['meta', 'original', 'width']) || null;
const height = media.getIn(['meta', 'original', 'height']) || null;
const focals = ['image', 'gifv'].includes(media.get('type'));
const previewRatio = 16/9;
const previewWidth = 200;
const previewHeight = previewWidth / previewRatio;
return (
<div className='modal-root__modal report-modal' style={{ maxWidth: 960 }}>
<div className='report-modal__target'>
<IconButton className='media-modal__close' title={intl.formatMessage(messages.close)} icon='times' onClick={onClose} size={16} />
<FormattedMessage id='upload_modal.edit_media' defaultMessage='Edit media' />
</div>
<div className='report-modal__container'>
<div className='report-modal__comment'>
{focals && <p><FormattedMessage id='upload_modal.hint' defaultMessage='Click or drag the circle on the preview to choose the focal point which will always be in view on all thumbnails.' /></p>}
<label className='setting-text-label' htmlFor='upload-modal__description'><FormattedMessage id='upload_form.description' defaultMessage='Describe for the visually impaired' /></label>
<div className='setting-text__wrapper'>
<Textarea
id='upload-modal__description'
className='setting-text light'
value={detecting ? '…' : description}
onChange={this.handleChange}
onKeyDown={this.handleKeyDown}
disabled={detecting}
autoFocus
/>
<div className='setting-text__modifiers'>
<UploadProgress progress={progress * 100} active={detecting} icon='file-text-o' message={<FormattedMessage id='upload_modal.analyzing_picture' defaultMessage='Analyzing picture…' />} />
</div>
</div>
<div className='setting-text__toolbar'>
<button disabled={detecting || media.get('type') !== 'image'} className='link-button' onClick={this.handleTextDetection}><FormattedMessage id='upload_modal.detect_text' defaultMessage='Detect text from picture' /></button>
<CharacterCounter max={1500} text={detecting ? '' : description} />
</div>
<Button disabled={!dirty || detecting || length(description) > 1500} text={intl.formatMessage(messages.apply)} onClick={this.handleSubmit} />
</div>
<div className='focal-point-modal__content'>
{focals && (
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<div className={classNames('focal-point', { dragging })} ref={this.setRef} onMouseDown={this.handleMouseDown} onTouchStart={this.handleTouchStart}>
{media.get('type') === 'image' && <ImageLoader src={media.get('url')} width={width} height={height} alt='' />}
{media.get('type') === 'gifv' && <GIFV src={media.get('url')} width={width} height={height} />}
<div className='focal-point__preview'>
<strong><FormattedMessage id='upload_modal.preview_label' defaultMessage='Preview ({ratio})' values={{ ratio: '16:9' }} /></strong>
<div style={{ width: previewWidth, height: previewHeight, backgroundImage: `url(${media.get('preview_url')})`, backgroundSize: 'cover', backgroundPosition: `${x * 100}% ${y * 100}%` }} />
</div>
<div className='focal-point__reticle' style={{ top: `${y * 100}%`, left: `${x * 100}%` }} />
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<div className='focal-point__overlay' />
</div>
)}
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{media.get('type') === 'video' && (
<Video
preview={media.get('preview_url')}
blurhash={media.get('blurhash')}
src={media.get('url')}
detailed
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inline
editable
/>
)}
{media.get('type') === 'audio' && (
<Audio
src={media.get('url')}
duration={media.getIn(['meta', 'original', 'duration'], 0)}
height={150}
preload
editable
/>
)}
</div>
</div>
</div>
);
}
}