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refactor(tui): clean thinking and viewport helpers

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This commit is contained in:
Brooklyn Nicholson 2026-04-26 14:03:36 -05:00
parent a30ffbe1d4
commit 7b5b524fc7
2 changed files with 15 additions and 40 deletions
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26
ui-tui/src/lib/viewportStore.ts
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@ -45,19 +45,6 @@ export function viewportSnapshotKey(v: ViewportSnapshot) {
return `${v.atBottom ? 1 : 0}:${v.top}:${v.viewportHeight}:${v.scrollHeight}:${v.pending}`
}
const snapshotFromKey = (key: string): ViewportSnapshot => {
const [atBottom = '1', top = '0', viewportHeight = '0', scrollHeight = '0', pending = '0'] = key.split(':')
return {
atBottom: atBottom === '1',
bottom: Number(top) + Number(viewportHeight),
pending: Number(pending),
scrollHeight: Number(scrollHeight),
top: Number(top),
viewportHeight: Number(viewportHeight)
}
}
export function useViewportSnapshot(scrollRef: RefObject<ScrollBoxHandle | null>): ViewportSnapshot {
const key = useSyncExternalStore(
useCallback((cb: () => void) => scrollRef.current?.subscribe(cb) ?? (() => {}), [scrollRef]),
@ -65,5 +52,16 @@ export function useViewportSnapshot(scrollRef: RefObject<ScrollBoxHandle | null>
() => viewportSnapshotKey(EMPTY)
)
return useMemo(() => snapshotFromKey(key), [key])
return useMemo(() => {
const [atBottom = '1', top = '0', viewportHeight = '0', scrollHeight = '0', pending = '0'] = key.split(':')
return {
atBottom: atBottom === '1',
bottom: Number(top) + Number(viewportHeight),
pending: Number(pending),
scrollHeight: Number(scrollHeight),
top: Number(top),
viewportHeight: Number(viewportHeight)
}
}, [key])
}