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import React, {useState, useEffect} from 'react'
import {
Image,
ImageStyle,
LayoutChangeEvent,
StyleProp,
StyleSheet,
TouchableWithoutFeedback,
View,
ViewStyle,
} from 'react-native'
import {Text} from '../text/Text'
import {useTheme} from '../../../lib/ThemeContext'
import {usePalette} from '../../../lib/hooks/usePalette'
const MAX_HEIGHT = 300
interface Dim {
width: number
height: number
}
export function AutoSizedImage({
uri,
onPress,
style,
containerStyle,
}: {
uri: string
onPress?: () => void
style?: StyleProp<ImageStyle>
containerStyle?: StyleProp<ViewStyle>
}) {
const theme = useTheme()
const errPal = usePalette('error')
const [error, setError] = useState<string | undefined>('')
const [imgInfo, setImgInfo] = useState<Dim | undefined>()
const [containerInfo, setContainerInfo] = useState<Dim | undefined>()
useEffect(() => {
let aborted = false
if (!imgInfo) {
Image.getSize(
uri,
(width: number, height: number) => {
if (!aborted) {
setImgInfo({width, height})
}
},
(err: any) => {
if (!aborted) {
setError(String(err))
}
},
)
}
return () => {
aborted = true
}
}, [uri, imgInfo])
const onLayout = (evt: LayoutChangeEvent) => {
setContainerInfo({
width: evt.nativeEvent.layout.width,
height: evt.nativeEvent.layout.height,
})
}
let calculatedStyle: StyleProp<ViewStyle> | undefined
if (imgInfo && containerInfo) {
// imgInfo.height / imgInfo.width = x / containerInfo.width
// x = imgInfo.height / imgInfo.width * containerInfo.width
calculatedStyle = {
height: Math.min(
MAX_HEIGHT,
(imgInfo.height / imgInfo.width) * containerInfo.width,
),
}
}
return (
<View style={style}>
<TouchableWithoutFeedback onPress={onPress}>
{error ? (
<View style={[styles.errorContainer, errPal.view, containerStyle]}>
<Text style={errPal.text}>{error}</Text>
</View>
) : calculatedStyle ? (
<View style={[styles.container, containerStyle]}>
<Image style={calculatedStyle} source={{uri}} />
</View>
) : (
<View
style={[
style,
styles.placeholder,
{backgroundColor: theme.palette.default.backgroundLight},
]}
onLayout={onLayout}
/>
)}
</TouchableWithoutFeedback>
</View>
)
}
const styles = StyleSheet.create({
placeholder: {
width: '100%',
aspectRatio: 1,
},
errorContainer: {
paddingHorizontal: 12,
paddingVertical: 8,
},
container: {
overflow: 'hidden',
},
})
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