57 lines
1.4 KiB
TypeScript
57 lines
1.4 KiB
TypeScript
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import React from 'react'
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type Component = React.ReactElement
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type ContextType = {
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outlet: Component | null
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append(id: string, component: Component): void
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remove(id: string): void
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}
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type ComponentMap = {
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[id: string]: Component
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}
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export const Context = React.createContext<ContextType>({
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outlet: null,
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append: () => {},
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remove: () => {},
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})
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export function Provider(props: React.PropsWithChildren<{}>) {
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const map = React.useRef<ComponentMap>({})
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const [outlet, setOutlet] = React.useState<ContextType['outlet']>(null)
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const append = React.useCallback<ContextType['append']>((id, component) => {
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if (map.current[id]) return
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map.current[id] = <React.Fragment key={id}>{component}</React.Fragment>
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setOutlet(<>{Object.values(map.current)}</>)
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}, [])
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const remove = React.useCallback<ContextType['remove']>(id => {
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delete map.current[id]
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setOutlet(<>{Object.values(map.current)}</>)
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}, [])
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return (
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<Context.Provider value={{outlet, append, remove}}>
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{props.children}
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</Context.Provider>
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)
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}
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export function Outlet() {
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const ctx = React.useContext(Context)
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return ctx.outlet
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}
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export function Portal({children}: React.PropsWithChildren<{}>) {
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const {append, remove} = React.useContext(Context)
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const id = React.useId()
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React.useEffect(() => {
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append(id, children as Component)
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return () => remove(id)
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}, [id, children, append, remove])
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return null
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}
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