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import React from 'react'
import {AccessibilityInfo} from 'react-native'
import {isReducedMotion} from 'react-native-reanimated'
import {isWeb} from '#/platform/detection'
const Context = React.createContext({
reduceMotionEnabled: false,
screenReaderEnabled: false,
})
export function useA11y() {
return React.useContext(Context)
}
export function Provider({children}: React.PropsWithChildren<{}>) {
const [reduceMotionEnabled, setReduceMotionEnabled] = React.useState(() =>
isReducedMotion(),
)
const [screenReaderEnabled, setScreenReaderEnabled] = React.useState(false)
React.useEffect(() => {
const reduceMotionChangedSubscription = AccessibilityInfo.addEventListener(
'reduceMotionChanged',
enabled => {
setReduceMotionEnabled(enabled)
},
)
const screenReaderChangedSubscription = AccessibilityInfo.addEventListener(
'screenReaderChanged',
enabled => {
setScreenReaderEnabled(enabled)
},
)
;(async () => {
const [_reduceMotionEnabled, _screenReaderEnabled] = await Promise.all([
AccessibilityInfo.isReduceMotionEnabled(),
AccessibilityInfo.isScreenReaderEnabled(),
])
setReduceMotionEnabled(_reduceMotionEnabled)
setScreenReaderEnabled(_screenReaderEnabled)
})()
return () => {
reduceMotionChangedSubscription.remove()
screenReaderChangedSubscription.remove()
}
}, [])
const ctx = React.useMemo(() => {
return {
reduceMotionEnabled,
/**
* Always returns true on web. For now, we're using this for mobile a11y,
* so we reset to false on web.
*
* @see https://github.com/necolas/react-native-web/discussions/2072
*/
screenReaderEnabled: isWeb ? false : screenReaderEnabled,
}
}, [reduceMotionEnabled, screenReaderEnabled])
return <Context.Provider value={ctx}>{children}</Context.Provider>
}
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