resources/js/components/common/PngPlayer.js

   1 import parseApng from 'apng-js';
   2 import axios from 'axios';
   3 import PropTypes from 'prop-types';
   4 import React from 'react';
   5 import { Button } from 'react-bootstrap';
   6 import { useTranslation } from 'react-i18next';
   7
   8 import Icon from './Icon';
   9
  10 const createPlayer = async (apng, canvas) => {
  11         const context = canvas.getContext('2d', { willReadFrequently: true });
  12         const player = await apng.getPlayer(context);
  13         player.stop();
  14         return player;
  15 };
  16
  17 const PngPlayer = ({ src }) => {
  18         const canvas = React.useRef();
  19         const { t } = useTranslation();
  20
  21         const [apng, setApng] = React.useState(null);
  22         const [error, setError] = React.useState(null);
  23         const [frameInfo, setFrameInfo] = React.useState('');
  24         const [loading, setLoading] = React.useState(true);
  25         const [player, setPlayer] = React.useState(null);
  26
  27         React.useEffect(() => {
  28                 if (!src) return;
  29                 setError(null);
  30                 setLoading(true);
  31                 const ctrl = new AbortController();
  32                 const fetchPng = async () => {
  33                         try {
  34                                 const response = await axios.get(src, {
  35                                         responseType: 'arraybuffer',
  36                                         signal: ctrl.signal,
  37                                 });
  38                                 const png = parseApng(response.data);
  39                                 await png.createImages();
  40                                 setApng(png);
  41                                 setLoading(false);
  42                         } catch (e) {
  43                                 if (!axios.isCancel(e)) {
  44                                         setError(e);
  45                                         console.log(e);
  46                                 }
  47                         }
  48                 };
  49                 fetchPng();
  50                 return () => {
  51                         ctrl.abort();
  52                 };
  53         }, [src]);
  54
  55         React.useEffect(() => {
  56                 if (loading || !canvas.current) return;
  57                 setFrameInfo(`1/${apng.frames.length}`);
  58                 (async () => {
  59                         const p = await createPlayer(apng, canvas.current);
  60                         setPlayer(p);
  61                         const updateFrame = (number) => {
  62                                 setFrameInfo(`${number + 1}/${apng.frames.length}`);
  63                         };
  64                         p.on('frame', updateFrame);
  65                 })();
  66         }, [apng, canvas.current, loading]);
  67
  68         const stop = React.useCallback(() => {
  69                 if (player) player.stop();
  70         }, [player]);
  71
  72         const toggle = React.useCallback(() => {
  73                 if (!player) return;
  74                 if (player.paused) {
  75                         player.play();
  76                 } else {
  77                         player.pause();
  78                 }
  79         }, [player]);
  80
  81         const nextFrame = React.useCallback(() => {
  82                 if (player) player.renderNextFrame();
  83         }, [player]);
  84
  85         if (error) {
  86                 return <div>Error</div>;
  87         }
  88         if (loading) {
  89                 return <div>Loading</div>;
  90         }
  91
  92         return <div className="png-player">
  93                 <div className="screen">
  94                         <canvas ref={canvas} width={apng.width} height={apng.height} />
  95                 </div>
  96                 <span className="ms-auto">{frameInfo}</span>
  97                 <div className="button-bar controls">
  98                         <Button
  99                                 onClick={stop}
 100                                 title={t('button.stop')}
 101                                 variant="outline-secondary"
 102                         >
 103                                 <Icon.STOP title="" />
 104                         </Button>
 105                         <Button
 106                                 onClick={toggle}
 107                                 title={t('button.playPause')}
 108                                 variant="outline-secondary"
 109                         >
 110                                 <Icon.PLAY title="" />
 111                                 {' '}
 112                                 <Icon.PAUSE title="" />
 113                         </Button>
 114                         <Button
 115                                 onClick={nextFrame}
 116                                 title={t('button.nextFrame')}
 117                                 variant="outline-secondary"
 118                         >
 119                                 <Icon.STEP_FORWARD title="" />
 120                         </Button>
 121                 </div>
 122         </div>;
 123 };
 124
 125 PngPlayer.propTypes = {
 126         src: PropTypes.string,
 127 };
 128
 129 export default PngPlayer;