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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| import * as React from 'react' | ||
| import {Animated} from 'react-native' | ||
| // Bookkeep whats animating so it finishes and isn't replaced, if we've animated it we keep the key and use null | ||
| const animatingMap = new Map<string, null | React.ReactElement>() | ||
|
|
||
| type AnimatedChildProps = { | ||
| animatingKey: string | ||
| children: React.ReactNode | ||
| } | ||
| const AnimatedChild = React.memo(function AnimatedChild({children, animatingKey}: AnimatedChildProps) { | ||
| const [done, setDone] = React.useState(false) | ||
| const translateY = React.useRef(new Animated.Value(999)).current | ||
| const opacity = React.useRef(new Animated.Value(0)).current | ||
| React.useEffect(() => { | ||
| // on unmount, mark it null | ||
| return () => { | ||
| animatingMap.set(animatingKey, null) | ||
| } | ||
| }, [animatingKey]) | ||
|
|
||
| // only animate up once | ||
| const onceRef = React.useRef(false) | ||
|
|
||
| React.useEffect(() => { | ||
| onceRef.current = false | ||
| }, [animatingKey]) | ||
|
|
||
| return done ? ( | ||
| <>{children}</> | ||
| ) : ( | ||
| <Animated.View | ||
| style={{opacity, overflow: 'hidden', transform: [{translateY}], width: '100%'}} | ||
| onLayout={(e: any) => { | ||
| if (onceRef.current) { | ||
| return | ||
| } | ||
| const {height} = e.nativeEvent.layout | ||
| onceRef.current = true | ||
| translateY.setValue(height + 10) | ||
| Animated.parallel([ | ||
| Animated.timing(opacity, { | ||
| duration: 200, | ||
| toValue: 1, | ||
| useNativeDriver: true, | ||
| }), | ||
| Animated.timing(translateY, { | ||
| duration: 200, | ||
| toValue: 0, | ||
| useNativeDriver: true, | ||
| }), | ||
| ]).start(() => { | ||
| animatingMap.set(animatingKey, null) | ||
| setDone(true) | ||
| }) | ||
| }} | ||
| > | ||
| {children} | ||
| </Animated.View> | ||
| ) | ||
| }) | ||
|
|
||
| type SentProps = { | ||
| children: React.ReactNode | ||
| sentKey: string | ||
| } | ||
| export const Sent = function Sent(p: SentProps) { | ||
| const {children, sentKey} = p | ||
| const state = animatingMap.get(sentKey) | ||
|
|
||
| // if its animating always show it | ||
| if (state) { | ||
| return state | ||
| } | ||
|
|
||
| // if state is null we already animated it | ||
| if (state === undefined) { | ||
| const c = <AnimatedChild animatingKey={sentKey}>{children}</AnimatedChild> | ||
| animatingMap.set(sentKey, c) | ||
| return c | ||
| } else { | ||
| return <>{children}</> | ||
| } | ||
| } |
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