diff options
Diffstat (limited to 'app/javascript/mastodon/components')
-rw-r--r-- | app/javascript/mastodon/components/blurhash.js | 61 | ||||
-rw-r--r-- | app/javascript/mastodon/components/media_gallery.js | 46 |
2 files changed, 74 insertions, 33 deletions
diff --git a/app/javascript/mastodon/components/blurhash.js b/app/javascript/mastodon/components/blurhash.js new file mode 100644 index 000000000..172f8c2f5 --- /dev/null +++ b/app/javascript/mastodon/components/blurhash.js @@ -0,0 +1,61 @@ +// @ts-check + +import { decode } from 'blurhash'; +import React, { useRef, useEffect } from 'react'; +import PropTypes from 'prop-types'; + +/** + * @typedef BlurhashPropsBase + * @property {string} hash Hash to render + * @property {number} width + * Width of the blurred region in pixels. Defaults to 32 + * @property {number} [height] + * Height of the blurred region in pixels. Defaults to width + * @property {boolean} [dummy] + * Whether dummy mode is enabled. If enabled, nothing is rendered + * and canvas left untouched + */ + +/** @typedef {JSX.IntrinsicElements['canvas'] & BlurhashPropsBase} BlurhashProps */ + +/** + * Component that is used to render blurred of blurhash string + * + * @param {BlurhashProps} param1 Props of the component + * @returns Canvas which will render blurred region element to embed + */ +function Blurhash({ + hash, + width = 32, + height = width, + dummy = false, + ...canvasProps +}) { + const canvasRef = /** @type {import('react').MutableRefObject<HTMLCanvasElement>} */ (useRef()); + + useEffect(() => { + const { current: canvas } = canvasRef; + canvas.width = canvas.width; // resets canvas + + if (dummy) return; + + const pixels = decode(hash, width, height); + const ctx = canvas.getContext('2d'); + const imageData = new ImageData(pixels, width, height); + + ctx.putImageData(imageData, 0, 0); + }, [dummy, hash, width, height]); + + return ( + <canvas {...canvasProps} ref={canvasRef} width={width} height={height} /> + ); +} + +Blurhash.propTypes = { + hash: PropTypes.string.isRequired, + width: PropTypes.number, + height: PropTypes.number, + dummy: PropTypes.bool, +}; + +export default React.memo(Blurhash); diff --git a/app/javascript/mastodon/components/media_gallery.js b/app/javascript/mastodon/components/media_gallery.js index 0ec866138..0a8f42585 100644 --- a/app/javascript/mastodon/components/media_gallery.js +++ b/app/javascript/mastodon/components/media_gallery.js @@ -7,8 +7,8 @@ import { defineMessages, injectIntl, FormattedMessage } from 'react-intl'; import { isIOS } from '../is_mobile'; import classNames from 'classnames'; import { autoPlayGif, cropImages, displayMedia, useBlurhash } from '../initial_state'; -import { decode } from 'blurhash'; import { debounce } from 'lodash'; +import Blurhash from 'mastodon/components/blurhash'; const messages = defineMessages({ toggle_visible: { id: 'media_gallery.toggle_visible', defaultMessage: 'Hide {number, plural, one {image} other {images}}' }, @@ -74,36 +74,6 @@ class Item extends React.PureComponent { e.stopPropagation(); } - componentDidMount () { - if (this.props.attachment.get('blurhash')) { - this._decode(); - } - } - - componentDidUpdate (prevProps) { - if (prevProps.attachment.get('blurhash') !== this.props.attachment.get('blurhash') && this.props.attachment.get('blurhash')) { - this._decode(); - } - } - - _decode () { - if (!useBlurhash) return; - - const hash = this.props.attachment.get('blurhash'); - const pixels = decode(hash, 32, 32); - - if (pixels) { - const ctx = this.canvas.getContext('2d'); - const imageData = new ImageData(pixels, 32, 32); - - ctx.putImageData(imageData, 0, 0); - } - } - - setCanvasRef = c => { - this.canvas = c; - } - handleImageLoad = () => { this.setState({ loaded: true }); } @@ -166,7 +136,11 @@ class Item extends React.PureComponent { 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}%` }}> <a className='media-gallery__item-thumbnail' href={attachment.get('remote_url') || attachment.get('url')} style={{ cursor: 'pointer' }} title={attachment.get('description')} target='_blank' rel='noopener noreferrer'> - <canvas width={32} height={32} ref={this.setCanvasRef} className='media-gallery__preview' /> + <Blurhash + hash={attachment.get('blurhash')} + className='media-gallery__preview' + dummy={!useBlurhash} + /> </a> </div> ); @@ -232,7 +206,13 @@ class Item extends React.PureComponent { 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}%` }}> - <canvas width={32} height={32} ref={this.setCanvasRef} className={classNames('media-gallery__preview', { 'media-gallery__preview--hidden': visible && this.state.loaded })} /> + <Blurhash + hash={attachment.get('blurhash')} + dummy={!useBlurhash} + className={classNames('media-gallery__preview', { + 'media-gallery__preview--hidden': visible && this.state.loaded, + })} + /> {visible && thumbnail} </div> ); |