521 lines
		
	
	
	
		
			15 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			521 lines
		
	
	
	
		
			15 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| import React from 'react';
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| import PropTypes from 'prop-types';
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| import { defineMessages, injectIntl } from 'react-intl';
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| import { formatTime } from 'mastodon/features/video';
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| import Icon from 'mastodon/components/icon';
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| import classNames from 'classnames';
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| import { throttle } from 'lodash';
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| import { getPointerPosition, fileNameFromURL } from 'mastodon/features/video';
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| import { debounce } from 'lodash';
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| import Visualizer from './visualizer';
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| 
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| const messages = defineMessages({
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|   play: { id: 'video.play', defaultMessage: 'Play' },
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|   pause: { id: 'video.pause', defaultMessage: 'Pause' },
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|   mute: { id: 'video.mute', defaultMessage: 'Mute sound' },
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|   unmute: { id: 'video.unmute', defaultMessage: 'Unmute sound' },
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|   download: { id: 'video.download', defaultMessage: 'Download file' },
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| });
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| 
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| const TICK_SIZE = 10;
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| const PADDING   = 180;
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| 
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| export default @injectIntl
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| class Audio extends React.PureComponent {
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| 
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|   static propTypes = {
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|     src: PropTypes.string.isRequired,
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|     alt: PropTypes.string,
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|     poster: PropTypes.string,
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|     duration: PropTypes.number,
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|     width: PropTypes.number,
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|     height: PropTypes.number,
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|     editable: PropTypes.bool,
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|     fullscreen: PropTypes.bool,
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|     intl: PropTypes.object.isRequired,
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|     cacheWidth: PropTypes.func,
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|     backgroundColor: PropTypes.string,
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|     foregroundColor: PropTypes.string,
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|     accentColor: PropTypes.string,
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|     currentTime: PropTypes.number,
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|     autoPlay: PropTypes.bool,
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|     volume: PropTypes.number,
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|     muted: PropTypes.bool,
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|     deployPictureInPicture: PropTypes.func,
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|   };
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| 
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|   state = {
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|     width: this.props.width,
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|     currentTime: 0,
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|     buffer: 0,
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|     duration: null,
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|     paused: true,
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|     muted: false,
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|     volume: 0.5,
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|     dragging: false,
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|   };
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| 
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|   constructor (props) {
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|     super(props);
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|     this.visualizer = new Visualizer(TICK_SIZE);
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|   }
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| 
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|   setPlayerRef = c => {
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|     this.player = c;
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| 
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|     if (this.player) {
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|       this._setDimensions();
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|     }
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|   }
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| 
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|   _pack() {
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|     return {
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|       src: this.props.src,
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|       volume: this.audio.volume,
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|       muted: this.audio.muted,
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|       currentTime: this.audio.currentTime,
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|       poster: this.props.poster,
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|       backgroundColor: this.props.backgroundColor,
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|       foregroundColor: this.props.foregroundColor,
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|       accentColor: this.props.accentColor,
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|     };
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|   }
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| 
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|   _setDimensions () {
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|     const width  = this.player.offsetWidth;
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|     const height = this.props.fullscreen ? this.player.offsetHeight : (width / (16/9));
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| 
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|     if (this.props.cacheWidth) {
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|       this.props.cacheWidth(width);
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|     }
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| 
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|     this.setState({ width, height });
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|   }
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| 
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|   setSeekRef = c => {
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|     this.seek = c;
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|   }
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| 
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|   setVolumeRef = c => {
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|     this.volume = c;
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|   }
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| 
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|   setAudioRef = c => {
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|     this.audio = c;
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| 
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|     if (this.audio) {
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|       this.setState({ volume: this.audio.volume, muted: this.audio.muted });
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|     }
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|   }
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| 
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|   setCanvasRef = c => {
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|     this.canvas = c;
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| 
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|     this.visualizer.setCanvas(c);
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|   }
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| 
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|   componentDidMount () {
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|     window.addEventListener('scroll', this.handleScroll);
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|     window.addEventListener('resize', this.handleResize, { passive: true });
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|   }
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| 
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|   componentDidUpdate (prevProps, prevState) {
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|     if (prevProps.src !== this.props.src || this.state.width !== prevState.width || this.state.height !== prevState.height || prevProps.accentColor !== this.props.accentColor) {
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|       this._clear();
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|       this._draw();
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|     }
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|   }
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| 
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|   componentWillUnmount () {
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|     window.removeEventListener('scroll', this.handleScroll);
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|     window.removeEventListener('resize', this.handleResize);
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| 
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|     if (!this.state.paused && this.audio && this.props.deployPictureInPicture) {
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|       this.props.deployPictureInPicture('audio', this._pack());
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|     }
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|   }
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| 
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|   togglePlay = () => {
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|     if (!this.audioContext) {
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|       this._initAudioContext();
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|     }
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| 
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|     if (this.state.paused) {
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|       this.setState({ paused: false }, () => this.audio.play());
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|     } else {
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|       this.setState({ paused: true }, () => this.audio.pause());
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|     }
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|   }
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| 
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|   handleResize = debounce(() => {
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|     if (this.player) {
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|       this._setDimensions();
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|     }
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|   }, 250, {
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|     trailing: true,
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|   });
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| 
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|   handlePlay = () => {
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|     this.setState({ paused: false });
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| 
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|     if (this.audioContext && this.audioContext.state === 'suspended') {
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|       this.audioContext.resume();
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|     }
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| 
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|     this._renderCanvas();
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|   }
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| 
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|   handlePause = () => {
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|     this.setState({ paused: true });
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| 
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|     if (this.audioContext) {
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|       this.audioContext.suspend();
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|     }
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|   }
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| 
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|   handleProgress = () => {
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|     const lastTimeRange = this.audio.buffered.length - 1;
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| 
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|     if (lastTimeRange > -1) {
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|       this.setState({ buffer: Math.ceil(this.audio.buffered.end(lastTimeRange) / this.audio.duration * 100) });
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|     }
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|   }
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| 
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|   toggleMute = () => {
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|     const muted = !this.state.muted;
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| 
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|     this.setState({ muted }, () => {
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|       this.audio.muted = muted;
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|     });
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|   }
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| 
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|   handleVolumeMouseDown = e => {
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|     document.addEventListener('mousemove', this.handleMouseVolSlide, true);
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|     document.addEventListener('mouseup', this.handleVolumeMouseUp, true);
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|     document.addEventListener('touchmove', this.handleMouseVolSlide, true);
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|     document.addEventListener('touchend', this.handleVolumeMouseUp, true);
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| 
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|     this.handleMouseVolSlide(e);
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| 
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|     e.preventDefault();
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|     e.stopPropagation();
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|   }
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| 
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|   handleVolumeMouseUp = () => {
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|     document.removeEventListener('mousemove', this.handleMouseVolSlide, true);
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|     document.removeEventListener('mouseup', this.handleVolumeMouseUp, true);
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|     document.removeEventListener('touchmove', this.handleMouseVolSlide, true);
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|     document.removeEventListener('touchend', this.handleVolumeMouseUp, true);
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|   }
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| 
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|   handleMouseDown = e => {
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|     document.addEventListener('mousemove', this.handleMouseMove, true);
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|     document.addEventListener('mouseup', this.handleMouseUp, true);
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|     document.addEventListener('touchmove', this.handleMouseMove, true);
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|     document.addEventListener('touchend', this.handleMouseUp, true);
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| 
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|     this.setState({ dragging: true });
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|     this.audio.pause();
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|     this.handleMouseMove(e);
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| 
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|     e.preventDefault();
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|     e.stopPropagation();
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|   }
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| 
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|   handleMouseUp = () => {
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|     document.removeEventListener('mousemove', this.handleMouseMove, true);
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|     document.removeEventListener('mouseup', this.handleMouseUp, true);
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|     document.removeEventListener('touchmove', this.handleMouseMove, true);
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|     document.removeEventListener('touchend', this.handleMouseUp, true);
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| 
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|     this.setState({ dragging: false });
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|     this.audio.play();
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|   }
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| 
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|   handleMouseMove = throttle(e => {
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|     const { x } = getPointerPosition(this.seek, e);
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|     const currentTime = this.audio.duration * x;
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| 
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|     if (!isNaN(currentTime)) {
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|       this.setState({ currentTime }, () => {
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|         this.audio.currentTime = currentTime;
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|       });
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|     }
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|   }, 15);
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| 
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|   handleTimeUpdate = () => {
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|     this.setState({
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|       currentTime: this.audio.currentTime,
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|       duration: this.audio.duration,
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|     });
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|   }
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| 
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|   handleMouseVolSlide = throttle(e => {
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|     const { x } = getPointerPosition(this.volume, e);
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| 
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|     if(!isNaN(x)) {
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|       this.setState({ volume: x }, () => {
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|         this.audio.volume = x;
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|       });
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|     }
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|   }, 15);
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| 
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|   handleScroll = throttle(() => {
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|     if (!this.canvas || !this.audio) {
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|       return;
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|     }
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| 
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|     const { top, height } = this.canvas.getBoundingClientRect();
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|     const inView = (top <= (window.innerHeight || document.documentElement.clientHeight)) && (top + height >= 0);
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| 
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|     if (!this.state.paused && !inView) {
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|       this.audio.pause();
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| 
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|       if (this.props.deployPictureInPicture) {
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|         this.props.deployPictureInPicture('audio', this._pack());
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|       }
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| 
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|       this.setState({ paused: true });
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|     }
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|   }, 150, { trailing: true });
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| 
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|   handleMouseEnter = () => {
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|     this.setState({ hovered: true });
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|   }
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| 
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|   handleMouseLeave = () => {
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|     this.setState({ hovered: false });
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|   }
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| 
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|   handleLoadedData = () => {
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|     const { autoPlay, currentTime, volume, muted } = this.props;
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| 
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|     if (currentTime) {
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|       this.audio.currentTime = currentTime;
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|     }
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| 
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|     if (volume !== undefined) {
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|       this.audio.volume = volume;
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|     }
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| 
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|     if (muted !== undefined) {
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|       this.audio.muted = muted;
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|     }
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| 
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|     if (autoPlay) {
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|       this.togglePlay();
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|     }
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|   }
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| 
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|   _initAudioContext () {
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|     const AudioContext = window.AudioContext || window.webkitAudioContext;
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|     const context      = new AudioContext();
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|     const source       = context.createMediaElementSource(this.audio);
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| 
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|     this.visualizer.setAudioContext(context, source);
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|     source.connect(context.destination);
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| 
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|     this.audioContext = context;
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|   }
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| 
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|   handleDownload = () => {
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|     fetch(this.props.src).then(res => res.blob()).then(blob => {
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|       const element   = document.createElement('a');
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|       const objectURL = URL.createObjectURL(blob);
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| 
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|       element.setAttribute('href', objectURL);
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|       element.setAttribute('download', fileNameFromURL(this.props.src));
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| 
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|       document.body.appendChild(element);
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|       element.click();
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|       document.body.removeChild(element);
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| 
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|       URL.revokeObjectURL(objectURL);
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|     }).catch(err => {
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|       console.error(err);
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|     });
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|   }
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| 
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|   _renderCanvas () {
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|     requestAnimationFrame(() => {
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|       if (!this.audio) return;
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| 
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|       this.handleTimeUpdate();
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|       this._clear();
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|       this._draw();
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| 
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|       if (!this.state.paused) {
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|         this._renderCanvas();
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|       }
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|     });
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|   }
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| 
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|   _clear() {
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|     this.visualizer.clear(this.state.width, this.state.height);
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|   }
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| 
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|   _draw() {
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|     this.visualizer.draw(this._getCX(), this._getCY(), this._getAccentColor(), this._getRadius(), this._getScaleCoefficient());
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|   }
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| 
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|   _getRadius () {
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|     return parseInt(((this.state.height || this.props.height) - (PADDING * this._getScaleCoefficient()) * 2) / 2);
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|   }
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| 
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|   _getScaleCoefficient () {
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|     return (this.state.height || this.props.height) / 982;
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|   }
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| 
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|   _getCX() {
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|     return Math.floor(this.state.width / 2);
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|   }
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| 
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|   _getCY() {
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|     return Math.floor(this._getRadius() + (PADDING * this._getScaleCoefficient()));
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|   }
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| 
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|   _getAccentColor () {
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|     return this.props.accentColor || '#ffffff';
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|   }
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| 
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|   _getBackgroundColor () {
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|     return this.props.backgroundColor || '#000000';
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|   }
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| 
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|   _getForegroundColor () {
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|     return this.props.foregroundColor || '#ffffff';
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|   }
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| 
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|   seekBy (time) {
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|     const currentTime = this.audio.currentTime + time;
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| 
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|     if (!isNaN(currentTime)) {
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|       this.setState({ currentTime }, () => {
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|         this.audio.currentTime = currentTime;
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|       });
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|     }
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|   }
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| 
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|   handleAudioKeyDown = e => {
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|     // On the audio element or the seek bar, we can safely use the space bar
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|     // for playback control because there are no buttons to press
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| 
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|     if (e.key === ' ') {
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|       e.preventDefault();
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|       e.stopPropagation();
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|       this.togglePlay();
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|     }
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|   }
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| 
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|   handleKeyDown = e => {
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|     switch(e.key) {
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|     case 'k':
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|       e.preventDefault();
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|       e.stopPropagation();
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|       this.togglePlay();
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|       break;
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|     case 'm':
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|       e.preventDefault();
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|       e.stopPropagation();
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|       this.toggleMute();
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|       break;
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|     case 'j':
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|       e.preventDefault();
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|       e.stopPropagation();
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|       this.seekBy(-10);
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|       break;
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|     case 'l':
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|       e.preventDefault();
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|       e.stopPropagation();
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|       this.seekBy(10);
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|       break;
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|     }
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|   }
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| 
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|   render () {
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|     const { src, intl, alt, editable, autoPlay } = this.props;
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|     const { paused, muted, volume, currentTime, duration, buffer, dragging } = this.state;
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|     const progress = Math.min((currentTime / duration) * 100, 100);
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| 
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|     return (
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|       <div className={classNames('audio-player', { editable })} ref={this.setPlayerRef} style={{ backgroundColor: this._getBackgroundColor(), color: this._getForegroundColor(), width: '100%', height: this.props.fullscreen ? '100%' : (this.state.height || this.props.height) }} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave} tabIndex='0' onKeyDown={this.handleKeyDown}>
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|         <audio
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|           src={src}
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|           ref={this.setAudioRef}
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|           preload={autoPlay ? 'auto' : 'none'}
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|           onPlay={this.handlePlay}
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|           onPause={this.handlePause}
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|           onProgress={this.handleProgress}
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|           onLoadedData={this.handleLoadedData}
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|           crossOrigin='anonymous'
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|         />
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| 
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|         <canvas
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|           role='button'
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|           tabIndex='0'
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|           className='audio-player__canvas'
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|           width={this.state.width}
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|           height={this.state.height}
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|           style={{ width: '100%', position: 'absolute', top: 0, left: 0 }}
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|           ref={this.setCanvasRef}
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|           onClick={this.togglePlay}
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|           onKeyDown={this.handleAudioKeyDown}
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|           title={alt}
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|           aria-label={alt}
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|         />
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| 
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|         <img
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|           src={this.props.poster}
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|           alt=''
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|           width={(this._getRadius() - TICK_SIZE) * 2}
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|           height={(this._getRadius() - TICK_SIZE) * 2}
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|           style={{ position: 'absolute', left: this._getCX(), top: this._getCY(), transform: 'translate(-50%, -50%)', borderRadius: '50%', pointerEvents: 'none' }}
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|         />
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| 
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|         <div className='video-player__seek' onMouseDown={this.handleMouseDown} ref={this.setSeekRef}>
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|           <div className='video-player__seek__buffer' style={{ width: `${buffer}%` }} />
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|           <div className='video-player__seek__progress' style={{ width: `${progress}%`, backgroundColor: this._getAccentColor() }} />
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| 
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|           <span
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|             className={classNames('video-player__seek__handle', { active: dragging })}
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|             tabIndex='0'
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|             style={{ left: `${progress}%`, backgroundColor: this._getAccentColor() }}
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|             onKeyDown={this.handleAudioKeyDown}
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|           />
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|         </div>
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| 
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|         <div className='video-player__controls active'>
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|           <div className='video-player__buttons-bar'>
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|             <div className='video-player__buttons left'>
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|               <button type='button' title={intl.formatMessage(paused ? messages.play : messages.pause)} aria-label={intl.formatMessage(paused ? messages.play : messages.pause)} className='player-button' onClick={this.togglePlay}><Icon id={paused ? 'play' : 'pause'} fixedWidth /></button>
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|               <button type='button' title={intl.formatMessage(muted ? messages.unmute : messages.mute)} aria-label={intl.formatMessage(muted ? messages.unmute : messages.mute)} className='player-button' onClick={this.toggleMute}><Icon id={muted ? 'volume-off' : 'volume-up'} fixedWidth /></button>
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| 
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|               <div className={classNames('video-player__volume', { active: this.state.hovered })} ref={this.setVolumeRef} onMouseDown={this.handleVolumeMouseDown}>
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|                 <div className='video-player__volume__current' style={{ width: `${volume * 100}%`, backgroundColor: this._getAccentColor() }} />
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| 
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|                 <span
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|                   className='video-player__volume__handle'
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|                   tabIndex='0'
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|                   style={{ left: `${volume * 100}%`, backgroundColor: this._getAccentColor() }}
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|                 />
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|               </div>
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| 
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|               <span className='video-player__time'>
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|                 <span className='video-player__time-current'>{formatTime(Math.floor(currentTime))}</span>
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|                 <span className='video-player__time-sep'>/</span>
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|                 <span className='video-player__time-total'>{formatTime(Math.floor(this.state.duration || this.props.duration))}</span>
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|               </span>
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|             </div>
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| 
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|             <div className='video-player__buttons right'>
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|               <a title={intl.formatMessage(messages.download)} aria-label={intl.formatMessage(messages.download)} className='video-player__download__icon player-button' href={this.props.src} download>
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|                 <Icon id={'download'} fixedWidth />
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|               </a>
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|             </div>
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|           </div>
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|         </div>
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|       </div>
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|     );
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|   }
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| 
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| }
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