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import React from 'react'
import {
StyleProp,
StyleSheet,
TouchableOpacity,
View,
ViewStyle,
} from 'react-native'
import {Image} from 'expo-image'
import {clamp} from 'lib/numbers'
import {useStores} from 'state/index'
import {Dimensions} from 'lib/media/types'
export const DELAY_PRESS_IN = 500
const MIN_ASPECT_RATIO = 0.33 // 1/3
const MAX_ASPECT_RATIO = 5 // 5/1
interface Props {
alt?: string
uri: string
onPress?: () => void
onLongPress?: () => void
onPressIn?: () => void
style?: StyleProp<ViewStyle>
children?: React.ReactNode
}
export function AutoSizedImage({
alt,
uri,
onPress,
onLongPress,
onPressIn,
style,
children = null,
}: Props) {
const store = useStores()
const [dim, setDim] = React.useState<Dimensions | undefined>(
store.imageSizes.get(uri),
)
const [aspectRatio, setAspectRatio] = React.useState<number>(
dim ? calc(dim) : 1,
)
React.useEffect(() => {
let aborted = false
if (dim) {
return
}
store.imageSizes.fetch(uri).then(newDim => {
if (aborted) {
return
}
setDim(newDim)
setAspectRatio(calc(newDim))
})
}, [dim, setDim, setAspectRatio, store, uri])
if (onPress || onLongPress || onPressIn) {
return (
<TouchableOpacity
onPress={onPress}
onLongPress={onLongPress}
onPressIn={onPressIn}
delayPressIn={DELAY_PRESS_IN}
style={[styles.container, style]}
accessible={true}
accessibilityLabel="Share image"
accessibilityHint="Opens ways of sharing image">
<Image
style={[styles.image, {aspectRatio}]}
source={uri}
accessible={true} // Must set for `accessibilityLabel` to work
accessibilityIgnoresInvertColors
accessibilityLabel={alt}
accessibilityHint=""
/>
{children}
</TouchableOpacity>
)
}
return (
<View style={[styles.container, style]}>
<Image
style={[styles.image, {aspectRatio}]}
source={{uri}}
accessible={true} // Must set for `accessibilityLabel` to work
accessibilityIgnoresInvertColors
accessibilityLabel={alt}
accessibilityHint=""
/>
{children}
</View>
)
}
function calc(dim: Dimensions) {
if (dim.width === 0 || dim.height === 0) {
return 1
}
return clamp(dim.width / dim.height, MIN_ASPECT_RATIO, MAX_ASPECT_RATIO)
}
const styles = StyleSheet.create({
container: {
overflow: 'hidden',
},
image: {
width: '100%',
},
})
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