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Add ScrollView interceptor directly to children
#4331
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,5 @@ | ||
| import type { PropsWithChildren } from 'react'; | ||
| import React, { useCallback, useEffect, useMemo, useRef } from 'react'; | ||
| import React, { use, useCallback, useEffect, useMemo, useRef } from 'react'; | ||
| import type { | ||
| EmitterSubscription, | ||
| KeyboardEvent, | ||
|
|
@@ -95,7 +95,7 @@ type ScrollViewResponderInterceptorProps = PropsWithChildren<{ | |
| keyboardShouldPersistTaps?: RNScrollViewProps['keyboardShouldPersistTaps']; | ||
| }>; | ||
|
|
||
| const ScrollViewResponderInterceptor = ({ | ||
| export const ScrollViewResponderProvider = ({ | ||
| children, | ||
| keyboardShouldPersistTaps, | ||
| }: ScrollViewResponderInterceptorProps) => { | ||
|
|
@@ -110,44 +110,53 @@ const ScrollViewResponderInterceptor = ({ | |
| return () => unsubscribeFromKeyboardVisibility(); | ||
| }, []); | ||
|
|
||
| return ( | ||
| <JSResponderContext value={contextValue}>{children}</JSResponderContext> | ||
| ); | ||
| }; | ||
|
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| const LogicalResponderChild = ({ children }: PropsWithChildren) => { | ||
|
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| const jsResponderContext = use(JSResponderContext); | ||
|
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| const resetRNGHResponderEvent = useCallback(() => { | ||
| isRNGHResponderEvent.current = false; | ||
| updateResponderEventValue(jsResponderContext, false); | ||
| return false; | ||
| }, []); | ||
| }, [jsResponderContext]); | ||
|
|
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| const handleStartShouldSetResponder = useCallback(() => { | ||
| const shouldHandleRNGHEvent = | ||
| keyboardShouldPersistTaps === 'handled' && isRNGHResponderEvent.current; | ||
| jsResponderContext?.keyboardShouldPersistTaps === 'handled' && | ||
| jsResponderContext.isRNGHResponderEvent.current; | ||
|
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| isRNGHResponderEvent.current = false; | ||
| updateResponderEventValue(jsResponderContext, false); | ||
|
|
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| return shouldHandleRNGHEvent; | ||
| }, [keyboardShouldPersistTaps]); | ||
|
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| // RNGH tap responders need to let RN components higher in the tree handle | ||
| // the JS responder event first. If no RN component claims it, this logical | ||
| // ScrollView child consumes the marked event before ScrollView's own | ||
| // keyboardShouldPersistTaps='handled' responder logic handles it. | ||
| // For more information check this comment: | ||
| // https://github.com/software-mansion/react-native-gesture-handler/pull/4158#issuecomment-4431632964 | ||
| }, [jsResponderContext]); | ||
|
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||
| return ( | ||
| <JSResponderContext value={contextValue}> | ||
| <View | ||
| collapsable={false} | ||
| onStartShouldSetResponderCapture={resetRNGHResponderEvent} | ||
| onStartShouldSetResponder={handleStartShouldSetResponder} | ||
| pointerEvents="box-none" | ||
| style={styles.logicalResponder}> | ||
| {children} | ||
| </View> | ||
| </JSResponderContext> | ||
| <View | ||
|
Member
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. You're rendering a new non-flattenable view for each ScrollView child. This will measurably impact performance. |
||
| collapsable={false} | ||
| onStartShouldSetResponderCapture={resetRNGHResponderEvent} | ||
| onStartShouldSetResponder={handleStartShouldSetResponder} | ||
| pointerEvents="box-none" | ||
| style={styles.logicalResponder}> | ||
| {children} | ||
| </View> | ||
| ); | ||
| }; | ||
|
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||
| export function interceptScrollViewChildren(children: React.ReactNode) { | ||
| return React.Children.map(children, (child) => | ||
| child == null || typeof child === 'boolean' ? ( | ||
| child | ||
| ) : ( | ||
| <LogicalResponderChild>{child}</LogicalResponderChild> | ||
| ) | ||
| ); | ||
| } | ||
|
|
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| const styles = StyleSheet.create({ | ||
| logicalResponder: { | ||
| display: 'contents', | ||
| }, | ||
| }); | ||
|
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| export default ScrollViewResponderInterceptor; | ||
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I don't think React <19 is a concern