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import React from 'react'
import {DimensionValue, Pressable, View} from 'react-native'
import {Image} from 'expo-image'
import {AppBskyEmbedImages} from '@atproto/api'
import {msg} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import * as imageSizes from '#/lib/media/image-sizes'
import {Dimensions} from '#/lib/media/types'
import {useLargeAltBadgeEnabled} from '#/state/preferences/large-alt-badge'
import {atoms as a, useTheme} from '#/alf'
import {Crop_Stroke2_Corner0_Rounded as Crop} from '#/components/icons/Crop'
import {Text} from '#/components/Typography'
export function useImageAspectRatio({
src,
dimensions,
}: {
src: string
dimensions: Dimensions | undefined
}) {
const [raw, setAspectRatio] = React.useState<number>(
dimensions ? calc(dimensions) : 1,
)
const {isCropped, constrained, max} = React.useMemo(() => {
const a34 = 0.75 // max of 3:4 ratio in feeds
const constrained = Math.max(raw, a34)
const max = Math.max(raw, 0.25) // max of 1:4 in thread
const isCropped = raw < constrained
return {
isCropped,
constrained,
max,
}
}, [raw])
React.useEffect(() => {
let aborted = false
if (dimensions) return
imageSizes.fetch(src).then(newDim => {
if (aborted) return
setAspectRatio(calc(newDim))
})
return () => {
aborted = true
}
}, [dimensions, setAspectRatio, src])
return {
dimensions,
raw,
constrained,
max,
isCropped,
}
}
export function ConstrainedImage({
aspectRatio,
fullBleed,
children,
}: {
aspectRatio: number
fullBleed?: boolean
children: React.ReactNode
}) {
const t = useTheme()
/**
* Computed as a % value to apply as `paddingTop`
*/
const outerAspectRatio = React.useMemo<DimensionValue>(() => {
// capped to square or shorter
const ratio = Math.min(1 / aspectRatio, 1)
return `${ratio * 100}%`
}, [aspectRatio])
return (
<View style={[a.w_full]}>
<View style={[a.overflow_hidden, {paddingTop: outerAspectRatio}]}>
<View style={[a.absolute, a.inset_0, a.flex_row]}>
<View
style={[
a.h_full,
a.rounded_sm,
a.overflow_hidden,
t.atoms.bg_contrast_25,
fullBleed ? a.w_full : {aspectRatio},
]}>
{children}
</View>
</View>
</View>
</View>
)
}
export function AutoSizedImage({
image,
crop = 'constrained',
hideBadge,
onPress,
onLongPress,
onPressIn,
}: {
image: AppBskyEmbedImages.ViewImage
crop?: 'none' | 'square' | 'constrained'
hideBadge?: boolean
onPress?: () => void
onLongPress?: () => void
onPressIn?: () => void
}) {
const t = useTheme()
const {_} = useLingui()
const largeAlt = useLargeAltBadgeEnabled()
const {
constrained,
max,
isCropped: rawIsCropped,
} = useImageAspectRatio({
src: image.thumb,
dimensions: image.aspectRatio,
})
const cropDisabled = crop === 'none'
const isCropped = rawIsCropped && !cropDisabled
const hasAlt = !!image.alt
const contents = (
<>
<Image
style={[a.w_full, a.h_full]}
source={image.thumb}
accessible={true} // Must set for `accessibilityLabel` to work
accessibilityIgnoresInvertColors
accessibilityLabel={image.alt}
accessibilityHint=""
/>
{(hasAlt || isCropped) && !hideBadge ? (
<View
accessible={false}
style={[
a.absolute,
a.flex_row,
a.align_center,
a.rounded_xs,
t.atoms.bg_contrast_25,
{
gap: 3,
padding: 3,
bottom: a.p_xs.padding,
right: a.p_xs.padding,
opacity: 0.8,
},
largeAlt && [
{
gap: 4,
padding: 5,
},
],
]}>
{isCropped && (
<Crop
fill={t.atoms.text_contrast_high.color}
width={largeAlt ? 18 : 12}
/>
)}
{hasAlt && (
<Text style={[a.font_heavy, largeAlt ? a.text_xs : {fontSize: 8}]}>
ALT
</Text>
)}
</View>
) : null}
</>
)
if (cropDisabled) {
return (
<Pressable
onPress={onPress}
onLongPress={onLongPress}
onPressIn={onPressIn}
// alt here is what screen readers actually use
accessibilityLabel={image.alt}
accessibilityHint={_(msg`Tap to view full image`)}
style={[
a.w_full,
a.rounded_sm,
a.overflow_hidden,
t.atoms.bg_contrast_25,
{aspectRatio: max},
]}>
{contents}
</Pressable>
)
} else {
return (
<ConstrainedImage fullBleed={crop === 'square'} aspectRatio={constrained}>
<Pressable
onPress={onPress}
onLongPress={onLongPress}
onPressIn={onPressIn}
// alt here is what screen readers actually use
accessibilityLabel={image.alt}
accessibilityHint={_(msg`Tap to view full image`)}
style={[a.h_full]}>
{contents}
</Pressable>
</ConstrainedImage>
)
}
}
function calc(dim: Dimensions) {
if (dim.width === 0 || dim.height === 0) {
return 1
}
return dim.width / dim.height
}
|
