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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | import { useEffect, useRef, useCallback } from 'react'
import {
createSilentVideo,
requestNativeWakeLock,
releaseNativeWakeLock,
} from './wakeLockUtils'
/**
* useWakeLock - Prevents the screen from locking while active
*
* Uses the Screen Wake Lock API (iOS 16.4+, Chrome 84+) with a silent video
* fallback for older browsers.
*
* @param enabled - Whether wake lock should be active (default: true)
*/
export function useWakeLock(enabled: boolean = true): void {
const wakeLockRef = useRef<WakeLockSentinel | null>(null)
const videoRef = useRef<HTMLVideoElement | null>(null)
const usingFallbackRef = useRef(false)
const startVideoFallback = useCallback(() => {
if (videoRef.current) return
const video = createSilentVideo()
document.body.appendChild(video)
videoRef.current = video
video.play().catch(() => {})
usingFallbackRef.current = true
}, [])
const stopVideoFallback = useCallback(() => {
if (videoRef.current) {
videoRef.current.pause()
videoRef.current.remove()
videoRef.current = null
}
usingFallbackRef.current = false
}, [])
useEffect(() => {
if (!enabled) {
releaseNativeWakeLock(wakeLockRef.current)
wakeLockRef.current = null
stopVideoFallback()
return
}
let mounted = true
const enableWakeLock = async () => {
const sentinel = await requestNativeWakeLock()
if (sentinel) {
wakeLockRef.current = sentinel
sentinel.addEventListener('release', () => {
wakeLockRef.current = null
})
} else if (mounted) {
startVideoFallback()
}
}
enableWakeLock()
const handleVisibilityChange = async () => {
if (document.visibilityState === 'visible' && mounted && enabled) {
if (!usingFallbackRef.current) {
const sentinel = await requestNativeWakeLock()
if (sentinel) {
wakeLockRef.current = sentinel
sentinel.addEventListener('release', () => {
wakeLockRef.current = null
})
}
}
}
}
document.addEventListener('visibilitychange', handleVisibilityChange)
return () => {
mounted = false
releaseNativeWakeLock(wakeLockRef.current)
wakeLockRef.current = null
stopVideoFallback()
document.removeEventListener('visibilitychange', handleVisibilityChange)
}
}, [enabled, startVideoFallback, stopVideoFallback])
}
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