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perf(tui): stabilize long-session scrolling

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This commit is contained in:
Brooklyn Nicholson 2026-04-26 01:47:05 -05:00
parent 59b56d445c
commit db4e4acca0
10 changed files with 195 additions and 105 deletions
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16
ui-tui/src/hooks/useVirtualHistory.ts
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@ -167,8 +167,20 @@ export function useVirtualHistory(
}, [])
useLayoutEffect(() => {
const s = scrollRef.current
let dirty = false
// Give the renderer the mounted-row coverage for passive scroll clamping.
// Without this, burst wheel/page scroll can race past the React commit that
// updates the virtual range and paint spacer-only frames.
if (s && n > 0 && vp > 0) {
const min = offsets[start] ?? 0
const max = Math.max(min, (offsets[end] ?? total) - vp)
s.setClampBounds(min, max)
} else {
s?.setClampBounds(undefined, undefined)
}
if (skipMeasurement.current) {
skipMeasurement.current = false
} else {
@ -188,8 +200,6 @@ export function useVirtualHistory(
}
}
const s = scrollRef.current
if (s) {
const next = {
sticky: s.isSticky(),
@ -210,7 +220,7 @@ export function useVirtualHistory(
if (dirty) {
setVer(v => v + 1)
}
}, [end, hasScrollRef, items, scrollRef, start])
}, [end, hasScrollRef, items, n, offsets, scrollRef, start, total, vp])
return {
bottomSpacer: Math.max(0, total - (offsets[end] ?? total)),