lbry-desktop/ui/component/viewers/videoViewer/view.jsx

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// @flow
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import React, { useRef, useEffect, useState } from 'react';
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import { stopContextMenu } from 'util/context-menu';
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import videojs from 'video.js/dist/alt/video.core.novtt.min.js';
import 'video.js/dist/alt/video-js-cdn.min.css';
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import isUserTyping from 'util/detect-typing';
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const F11_KEYCODE = 122;
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const SPACE_BAR_KEYCODE = 32;
const SMALL_F_KEYCODE = 70;
const SMALL_M_KEYCODE = 77;
const ARROW_LEFT_KEYCODE = 37;
const ARROW_RIGHT_KEYCODE = 39;
const FULLSCREEN_KEYCODE = SMALL_F_KEYCODE;
const MUTE_KEYCODE = SMALL_M_KEYCODE;
const SEEK_FORWARD_KEYCODE = ARROW_RIGHT_KEYCODE;
const SEEK_BACKWARD_KEYCODE = ARROW_LEFT_KEYCODE;
const SEEK_STEP = 10; // time to seek in seconds
const VIDEO_JS_OPTIONS: { poster?: string } = {
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controls: true,
preload: 'auto',
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playbackRates: [0.25, 0.5, 0.75, 1, 1.1, 1.25, 1.5, 2],
responsive: true,
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};
type Props = {
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volume: number,
position: number,
muted: boolean,
hasFileInfo: boolean,
changeVolume: number => void,
savePosition: (string, number) => void,
changeMute: boolean => void,
setPlayingUri: (string | null) => void,
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source: string,
contentType: string,
thumbnail: string,
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hasFileInfo: boolean,
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onEndedCB: any,
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};
function VideoViewer(props: Props) {
const { contentType, source, setPlayingUri, onEndedCB, changeVolume, changeMute, volume, muted, thumbnail } = props;
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const videoRef = useRef();
const isAudio = contentType.includes('audio');
let forceTypes = [
'video/quicktime',
'application/x-ext-mkv',
'video/x-matroska',
'application/octet-stream',
'video/x-ms-wmv',
'video/x-msvideo',
'video/mpeg',
];
const forceMp4 = forceTypes.includes(contentType);
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const [requireRedraw, setRequireRedraw] = useState(false);
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let player;
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useEffect(() => {
const currentVideo: HTMLVideoElement | null = document.querySelector('video');
function doEnded() {
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// clear position
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setPlayingUri(null);
onEndedCB();
}
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function doPause(e: Event) {
// store position e.target.currentTime
}
function doVolume(e: Event) {
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// $FlowFixMe volume is missing in EventTarget
changeVolume(e.target.volume);
// $FlowFixMe muted is missing in EventTarget
changeMute(e.target.muted);
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}
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if (currentVideo) {
currentVideo.addEventListener('ended', doEnded);
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currentVideo.addEventListener('pause', doPause);
currentVideo.addEventListener('volumechange', doVolume);
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}
// cleanup function:
return () => {
if (currentVideo) {
currentVideo.removeEventListener('ended', doEnded);
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currentVideo.removeEventListener('pause', doPause);
currentVideo.removeEventListener('volumechange', doVolume);
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}
};
}, []);
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useEffect(() => {
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const videoNode = videoRef.current;
const videoJsOptions = {
...VIDEO_JS_OPTIONS,
sources: [
{
src: source,
type: forceMp4 ? 'video/mp4' : contentType,
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},
],
};
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if (isAudio) {
videoJsOptions.poster = thumbnail;
}
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if (!requireRedraw) {
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player = videojs(videoNode, videoJsOptions, function() {
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player.volume(volume);
player.muted(muted);
player.ready(() => {
// In the future this should be replaced with something that checks if the
// video is actually playing after calling play()
// If it's not, fall back to the play button
player.play();
});
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});
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}
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return () => {
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if (!player) {
return;
}
// Video.js has a player.dispose() function that is meant to cleanup a previous video
// We can't use this because it does some weird stuff to remove the video element from the page
// This makes it really hard to use because the ref we keep still thinks it's on the page
// requireRedraw just makes it so the video component is removed from the page _by react_
// Then it's set to false immediately after so we can re-mount a new player
setRequireRedraw(true);
player.pause();
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};
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}, [videoRef, source, contentType, setRequireRedraw, requireRedraw]);
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useEffect(() => {
if (requireRedraw) {
setRequireRedraw(false);
}
}, [requireRedraw]);
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useEffect(() => {
function handleKeyDown(e: KeyboardEvent) {
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const videoNode = videoRef.current;
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if (!videoNode || isUserTyping()) {
return;
}
if (e.keyCode === SPACE_BAR_KEYCODE) {
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videoNode.paused ? videoNode.play() : videoNode.pause();
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}
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// Fullscreen toggle shortcuts
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if (e.keyCode === FULLSCREEN_KEYCODE || e.keyCode === F11_KEYCODE) {
if (!player.isFullscreen()) {
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player.requestFullscreen();
} else {
player.exitFullscreen();
}
}
// Mute/Unmute Shortcuts
if (e.keyCode === MUTE_KEYCODE) {
videoNode.muted = !videoNode.muted;
}
// Seeking Shortcuts
const duration = videoNode.duration;
const currentTime = videoNode.currentTime;
if (e.keyCode === SEEK_FORWARD_KEYCODE) {
const newDuration = currentTime + SEEK_STEP;
videoNode.currentTime = newDuration > duration ? duration : newDuration;
}
if (e.keyCode === SEEK_BACKWARD_KEYCODE) {
const newDuration = currentTime - SEEK_STEP;
videoNode.currentTime = newDuration < 0 ? 0 : newDuration;
}
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}
window.addEventListener('keydown', handleKeyDown);
return () => {
window.removeEventListener('keydown', handleKeyDown);
};
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// include requireRedraw here so the event listener is re-added when we need to manually remove/add the video player
}, [videoRef, requireRedraw]);
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return (
<div className="file-render__viewer" onContextMenu={stopContextMenu}>
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{!requireRedraw && (
<div data-vjs-player>
{isAudio ? <audio ref={videoRef} className="video-js" /> : <video ref={videoRef} className="video-js" />}
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</div>
)}
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</div>
);
}
export default VideoViewer;