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@@ -1,5 +1,10 @@ | ||
import { FC } from 'react' | ||
import { FC, ForwardedRef } from 'react' | ||
import Observe from './Observe' | ||
type RenderFn<P = {}> = (observe: Observe, props: P) => ReturnType<FC> | ||
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type RenderFn<Props = {}, Ref = never> = ( | ||
observe: Observe, | ||
props: Props, | ||
ref: ForwardedRef<Ref> | ||
) => ReturnType<FC> | ||
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export default RenderFn |
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@@ -1,28 +1,30 @@ | ||
import RenderFn from './RenderFn' | ||
import { FC, useRef } from 'react' | ||
import { forwardRef, useRef } from 'react' | ||
import Observable from '../Observable' | ||
import diff from 'set-diffs' | ||
import useRerender from '@utilityjs/use-force-rerender' | ||
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const reactObserver = <P = {}>(renderFn: RenderFn<P>): FC<P> => (props) => { | ||
const rerender = useRerender() | ||
const previousObservablesRef = useRef(new Set<Observable<unknown>>()) | ||
const observables = new Set<Observable<unknown>>() | ||
const returnValue = renderFn((observable) => { | ||
observables.add(observable) | ||
return observable.getValue() | ||
}, props) | ||
// eslint-disable-next-line @typescript-eslint/explicit-function-return-type | ||
const reactObserver = <Props = {}, Ref = never>(renderFn: RenderFn<Props, Ref>) => | ||
forwardRef<Ref, Props>((props, ref) => { | ||
const rerender = useRerender() | ||
const previousObservablesRef = useRef(new Set<Observable<unknown>>()) | ||
const observables = new Set<Observable<unknown>>() | ||
const returnValue = renderFn((observable) => { | ||
observables.add(observable) | ||
return observable.getValue() | ||
}, props, ref) | ||
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const { add, remove } = diff(previousObservablesRef.current, observables) | ||
add.forEach(({ addRemove: { add } }) => { | ||
add(rerender) | ||
}) | ||
remove.forEach(({ addRemove: { remove } }) => { | ||
remove(rerender) | ||
}) | ||
previousObservablesRef.current = observables | ||
const { add, remove } = diff(previousObservablesRef.current, observables) | ||
add.forEach(({ addRemove: { add } }) => { | ||
add(rerender) | ||
}) | ||
remove.forEach(({ addRemove: { remove } }) => { | ||
remove(rerender) | ||
}) | ||
previousObservablesRef.current = observables | ||
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return returnValue | ||
} | ||
return returnValue | ||
}) | ||
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export default reactObserver |