431 lines
		
	
	
	
		
			13 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			431 lines
		
	
	
	
		
			13 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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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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const TICK_SIZE = 10;
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const PADDING   = 180;
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export default @injectIntl
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class Audio extends React.PureComponent {
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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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    autoPlay: PropTypes.bool,
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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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  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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  setPlayerRef = c => {
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    this.player = c;
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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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  _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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    if (this.props.cacheWidth) {
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      this.props.cacheWidth(width);
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    }
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    this.setState({ width, height });
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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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  setVolumeRef = c => {
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    this.volume = c;
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  }
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  setAudioRef = c => {
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    this.audio = c;
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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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  setCanvasRef = c => {
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    this.canvas = c;
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    this.visualizer.setCanvas(c);
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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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  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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  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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  togglePlay = () => {
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    if (!this.audioContext) {
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      this._initAudioContext();
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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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  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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  handlePlay = () => {
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    this.setState({ paused: false });
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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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    this._renderCanvas();
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  }
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  handlePause = () => {
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    this.setState({ paused: true });
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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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  handleProgress = () => {
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    const lastTimeRange = this.audio.buffered.length - 1;
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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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  toggleMute = () => {
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    const muted = !this.state.muted;
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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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  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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    this.handleMouseVolSlide(e);
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    e.preventDefault();
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    e.stopPropagation();
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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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  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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    this.setState({ dragging: true });
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    this.audio.pause();
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    this.handleMouseMove(e);
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    e.preventDefault();
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    e.stopPropagation();
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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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    this.setState({ dragging: false });
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    this.audio.play();
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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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    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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  handleTimeUpdate = () => {
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    this.setState({
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      currentTime: this.audio.currentTime,
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      duration: Math.floor(this.audio.duration),
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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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    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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  handleScroll = throttle(() => {
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    if (!this.canvas || !this.audio) {
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      return;
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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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    if (!this.state.paused && !inView) {
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      this.setState({ paused: true }, () => this.audio.pause());
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    }
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  }, 150, { trailing: true });
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  handleMouseEnter = () => {
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    this.setState({ hovered: true });
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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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  handleLoadedData = () => {
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    const { autoPlay } = this.props;
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    if (autoPlay) {
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      this.audio.play();
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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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    this.visualizer.setAudioContext(context, source);
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    source.connect(context.destination);
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    this.audioContext = context;
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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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      element.setAttribute('href', objectURL);
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      element.setAttribute('download', fileNameFromURL(this.props.src));
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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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      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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  _renderCanvas () {
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    requestAnimationFrame(() => {
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      if (!this.audio) return;
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      this.handleTimeUpdate();
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      this._clear();
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      this._draw();
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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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  _clear() {
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    this.visualizer.clear(this.state.width, this.state.height);
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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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  _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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  _getScaleCoefficient () {
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    return (this.state.height || this.props.height) / 982;
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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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  _getCY() {
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    return Math.floor(this._getRadius() + (PADDING * this._getScaleCoefficient()));
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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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  _getBackgroundColor () {
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    return this.props.backgroundColor || '#000000';
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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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  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 = (currentTime / duration) * 100;
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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}>
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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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        <canvas
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          role='button'
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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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          title={alt}
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          aria-label={alt}
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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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        <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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          <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: `${progress}%`, backgroundColor: this._getAccentColor() }}
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          />
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        </div>
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        <div className='video-player__controls active'>
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          <div className='video-player__buttons-bar'>
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            <div className='video-player__buttons left'>
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              <button type='button' title={intl.formatMessage(paused ? messages.play : messages.pause)} aria-label={intl.formatMessage(paused ? messages.play : messages.pause)} onClick={this.togglePlay}><Icon id={paused ? 'play' : 'pause'} fixedWidth /></button>
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              <button type='button' title={intl.formatMessage(muted ? messages.unmute : messages.mute)} aria-label={intl.formatMessage(muted ? messages.unmute : messages.mute)} onClick={this.toggleMute}><Icon id={muted ? 'volume-off' : 'volume-up'} fixedWidth /></button>
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              <div className={classNames('video-player__volume', { active: this.state.hovered })} ref={this.setVolumeRef} onMouseDown={this.handleVolumeMouseDown}>
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                <div className='video-player__volume__current' style={{ width: `${volume * 100}%`, backgroundColor: this._getAccentColor() }} />
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                <span
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                  className={classNames('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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              <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(this.state.duration || Math.floor(this.props.duration))}</span>
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              </span>
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            </div>
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            <div className='video-player__buttons right'>
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              <button type='button' title={intl.formatMessage(messages.download)} aria-label={intl.formatMessage(messages.download)} onClick={this.handleDownload}><Icon id='download' fixedWidth /></button>
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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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