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import React, {memo} from 'react'
import {RefreshControl, type ViewToken} from 'react-native'
import {
type FlatListPropsWithLayout,
runOnJS,
useSharedValue,
} from 'react-native-reanimated'
import {updateActiveVideoViewAsync} from '@haileyok/bluesky-video'
import {useAnimatedScrollHandler} from '#/lib/hooks/useAnimatedScrollHandler_FIXED'
import {useDedupe} from '#/lib/hooks/useDedupe'
import {useScrollHandlers} from '#/lib/ScrollContext'
import {addStyle} from '#/lib/styles'
import {isIOS} from '#/platform/detection'
import {useLightbox} from '#/state/lightbox'
import {useTheme} from '#/alf'
import {FlatList_INTERNAL} from './Views'
export type ListMethods = FlatList_INTERNAL
export type ListProps<ItemT = any> = Omit<
FlatListPropsWithLayout<ItemT>,
| 'onMomentumScrollBegin' // Use ScrollContext instead.
| 'onMomentumScrollEnd' // Use ScrollContext instead.
| 'onScroll' // Use ScrollContext instead.
| 'onScrollBeginDrag' // Use ScrollContext instead.
| 'onScrollEndDrag' // Use ScrollContext instead.
| 'refreshControl' // Pass refreshing and/or onRefresh instead.
| 'contentOffset' // Pass headerOffset instead.
| 'progressViewOffset' // Can't be an animated value
> & {
onScrolledDownChange?: (isScrolledDown: boolean) => void
headerOffset?: number
refreshing?: boolean
onRefresh?: () => void
onItemSeen?: (item: ItemT) => void
desktopFixedHeight?: number | boolean
// Web only prop to contain the scroll to the container rather than the window
disableFullWindowScroll?: boolean
sideBorders?: boolean
progressViewOffset?: number
}
export type ListRef = React.MutableRefObject<FlatList_INTERNAL | null>
const SCROLLED_DOWN_LIMIT = 200
let List = React.forwardRef<ListMethods, ListProps>(
(
{
onScrolledDownChange,
refreshing,
onRefresh,
onItemSeen,
headerOffset,
style,
progressViewOffset,
automaticallyAdjustsScrollIndicatorInsets = false,
...props
},
ref,
): React.ReactElement => {
const isScrolledDown = useSharedValue(false)
const t = useTheme()
const dedupe = useDedupe(400)
const {activeLightbox} = useLightbox()
function handleScrolledDownChange(didScrollDown: boolean) {
onScrolledDownChange?.(didScrollDown)
}
// Intentionally destructured outside the main thread closure.
// See https://github.com/bluesky-social/social-app/pull/4108.
const {
onBeginDrag: onBeginDragFromContext,
onEndDrag: onEndDragFromContext,
onScroll: onScrollFromContext,
onMomentumEnd: onMomentumEndFromContext,
} = useScrollHandlers()
const scrollHandler = useAnimatedScrollHandler({
onBeginDrag(e, ctx) {
onBeginDragFromContext?.(e, ctx)
},
onEndDrag(e, ctx) {
runOnJS(updateActiveVideoViewAsync)()
onEndDragFromContext?.(e, ctx)
},
onScroll(e, ctx) {
onScrollFromContext?.(e, ctx)
const didScrollDown = e.contentOffset.y > SCROLLED_DOWN_LIMIT
if (isScrolledDown.get() !== didScrollDown) {
isScrolledDown.set(didScrollDown)
if (onScrolledDownChange != null) {
runOnJS(handleScrolledDownChange)(didScrollDown)
}
}
if (isIOS) {
runOnJS(dedupe)(updateActiveVideoViewAsync)
}
},
// Note: adding onMomentumBegin here makes simulator scroll
// lag on Android. So either don't add it, or figure out why.
onMomentumEnd(e, ctx) {
runOnJS(updateActiveVideoViewAsync)()
onMomentumEndFromContext?.(e, ctx)
},
})
const [onViewableItemsChanged, viewabilityConfig] = React.useMemo(() => {
if (!onItemSeen) {
return [undefined, undefined]
}
return [
(info: {
viewableItems: Array<ViewToken>
changed: Array<ViewToken>
}) => {
for (const item of info.changed) {
if (item.isViewable) {
onItemSeen(item.item)
}
}
},
{
itemVisiblePercentThreshold: 40,
minimumViewTime: 0.5e3,
},
]
}, [onItemSeen])
let refreshControl
if (refreshing !== undefined || onRefresh !== undefined) {
refreshControl = (
<RefreshControl
key={t.atoms.text.color}
refreshing={refreshing ?? false}
onRefresh={onRefresh}
tintColor={t.atoms.text.color}
titleColor={t.atoms.text.color}
progressViewOffset={progressViewOffset ?? headerOffset}
/>
)
}
let contentOffset
if (headerOffset != null) {
style = addStyle(style, {
paddingTop: headerOffset,
})
contentOffset = {x: 0, y: headerOffset * -1}
}
return (
<FlatList_INTERNAL
showsVerticalScrollIndicator // overridable
onViewableItemsChanged={onViewableItemsChanged}
viewabilityConfig={viewabilityConfig}
{...props}
automaticallyAdjustsScrollIndicatorInsets={
automaticallyAdjustsScrollIndicatorInsets
}
scrollIndicatorInsets={{
top: headerOffset,
right: 1,
...props.scrollIndicatorInsets,
}}
indicatorStyle={t.scheme === 'dark' ? 'white' : 'black'}
contentOffset={contentOffset}
refreshControl={refreshControl}
onScroll={scrollHandler}
scrollsToTop={!activeLightbox}
scrollEventThrottle={1}
style={style}
// @ts-expect-error FlatList_INTERNAL ref type is wrong -sfn
ref={ref}
/>
)
},
)
List.displayName = 'List'
List = memo(List)
export {List}
|
