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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| import React, { ReactNode, useLayoutEffect, useRef, useState } from 'react' | ||
| import { LayoutChangeEvent, StyleSheet, View } from 'react-native' | ||
|
|
||
| type Props = { | ||
| children?: ReactNode | ||
| ratio?: number | ||
| } | ||
|
|
||
| type BareBalancerProps = { | ||
| containerHeight?: number | ||
| children?: ReactNode | ||
| parentRef: React.RefObject<View> | ||
| ratio?: number | ||
| } | ||
|
|
||
| const measureComponent = ( | ||
| component: React.RefObject<View>, | ||
| ): Promise<{ width: number; height: number }> => { | ||
| return new Promise((resolve) => { | ||
| if (component.current === null) { | ||
| return { width: 0, height: 0 } | ||
| } | ||
|
|
||
| setTimeout( | ||
| () => | ||
| component.current?.measure( | ||
| (x: number, y: number, width: number, height: number) => | ||
| resolve({ width, height }), | ||
| ), | ||
| 0, | ||
| ) | ||
| }) | ||
| } | ||
|
|
||
| const styles = StyleSheet.create({ | ||
| container: { | ||
| flexDirection: 'row', | ||
| display: 'flex', | ||
| justifyContent: 'center', | ||
| }, | ||
| }) | ||
|
|
||
| export const BareBalancerContainer: React.FC<Props> = ({ children, ratio }) => { | ||
| const [dimensions, setDimensions] = useState< | ||
| { width: number; height: number } | undefined | ||
| >() | ||
|
|
||
| const parentRef = useRef<View>(null) | ||
|
|
||
| const onPageLayout = (event: LayoutChangeEvent) => { | ||
| const { width, height } = event.nativeEvent.layout | ||
| setDimensions({ width, height }) | ||
| } | ||
|
|
||
| return ( | ||
| <View ref={parentRef} onLayout={onPageLayout} style={styles.container}> | ||
| <BareBalancerWithoutPageLayout | ||
| parentRef={parentRef} | ||
| ratio={ratio} | ||
| containerHeight={dimensions?.height} | ||
| > | ||
| {children} | ||
| </BareBalancerWithoutPageLayout> | ||
| </View> | ||
| ) | ||
| } | ||
|
|
||
| export const BareBalancerWithoutPageLayout: React.FC<BareBalancerProps> = ({ | ||
| children, | ||
| containerHeight, | ||
| parentRef, | ||
| ratio = 1, | ||
| }) => { | ||
| const [ran, setRan] = useState<boolean>(false) | ||
| const childRef = useRef<View>(null) | ||
|
|
||
| // investigate performance | ||
| // useEffect(() => { | ||
| // setRan(false); | ||
| // }, [children]); | ||
|
|
||
| useLayoutEffect(() => { | ||
| const relayout = async () => { | ||
| const update = (width?: number) => { | ||
| childRef.current?.setNativeProps({ style: { maxWidth: width } }) | ||
| } | ||
|
|
||
| update(undefined) | ||
| setRan(true) | ||
| const { height: initialHeight, width: initialWidth } = | ||
| await measureComponent(parentRef) | ||
|
|
||
| let left: number = initialWidth / 2 | ||
| let right: number = initialWidth | ||
| let middle: number | ||
|
|
||
| while (left + 1 < right) { | ||
| middle = ~~((left + right) / 2) | ||
|
Check failure on line 98 in src/components/Balancer.tsx
|
||
|
|
||
| update(middle) | ||
| const { height: currentHeight } = await measureComponent(parentRef) | ||
|
|
||
| if (currentHeight === initialHeight) { | ||
| right = middle | ||
| } else { | ||
| left = middle | ||
| } | ||
| } | ||
|
|
||
| // Update the wrapper width | ||
| update(right * ratio + initialWidth * (1 - ratio)) | ||
| //update(initialWidth - (initialWidth - right) * ratio); | ||
| } | ||
| if (!ran) { | ||
| if (parentRef.current === null) { | ||
| return | ||
| } | ||
| void relayout() | ||
| } | ||
| }, [ran, containerHeight, parentRef, ratio]) | ||
|
|
||
| return <View ref={childRef}>{children}</View> | ||
| } | ||
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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