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fix(tui): stabilize live progress rendering

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This commit is contained in:
Brooklyn Nicholson 2026-04-26 15:23:43 -05:00
parent d4dde6b5f2
commit a7831b63db
28 changed files with 619 additions and 154 deletions
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35
ui-tui/src/hooks/useVirtualHistory.ts
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@ -19,13 +19,15 @@ const FREEZE_RENDERS = 2
export const shouldSetVirtualClamp = ({
itemCount,
liveTailActive = false,
sticky,
viewportHeight
}: {
itemCount: number
liveTailActive?: boolean
sticky: boolean
viewportHeight: number
}) => itemCount > 0 && viewportHeight > 0 && !sticky
}) => itemCount > 0 && viewportHeight > 0 && !sticky && !liveTailActive
const upperBound = (arr: number[], target: number) => {
let lo = 0
@ -44,7 +46,13 @@ export function useVirtualHistory(
scrollRef: RefObject<ScrollBoxHandle | null>,
items: readonly { key: string }[],
columns: number,
{ estimate = ESTIMATE, overscan = OVERSCAN, maxMounted = MAX_MOUNTED, coldStartCount = COLD_START } = {}
{
estimate = ESTIMATE,
liveTailActive = false,
overscan = OVERSCAN,
maxMounted = MAX_MOUNTED,
coldStartCount = COLD_START
} = {}
) {
const nodes = useRef(new Map<string, unknown>())
const heights = useRef(new Map<string, number>())
@ -92,7 +100,7 @@ export function useVirtualHistory(
return NaN
}
const b = Math.floor(s.getScrollTop() / QUANTUM)
const b = Math.floor((s.getScrollTop() + s.getPendingDelta()) / QUANTUM)
return s.isSticky() ? -b - 1 : b
},
@ -131,8 +139,11 @@ export function useVirtualHistory(
const n = items.length
const total = offsets[n] ?? 0
const top = Math.max(0, scrollRef.current?.getScrollTop() ?? 0)
const pending = scrollRef.current?.getPendingDelta() ?? 0
const target = Math.max(0, top + pending)
const vp = Math.max(0, scrollRef.current?.getViewportHeight() ?? 0)
const sticky = scrollRef.current?.isSticky() ?? true
const recentManual = Date.now() - (scrollRef.current?.getLastManualScrollAt() ?? 0) < 1200
// During a freeze, drop the frozen range if items shrank past its start
// (/clear, compaction) — clamping would collapse to an empty mount and
@ -149,9 +160,19 @@ export function useVirtualHistory(
} else if (n > 0) {
if (vp <= 0) {
start = Math.max(0, n - coldStartCount)
} else if (sticky && !recentManual) {
const budget = vp + overscan
start = n
while (start > 0 && total - offsets[start - 1]! < budget) {
start--
}
} else {
start = Math.max(0, Math.min(n - 1, upperBound(offsets, Math.max(0, top - overscan)) - 1))
end = Math.max(start + 1, Math.min(n, upperBound(offsets, top + vp + overscan)))
const lo = Math.max(0, Math.min(top, target) - overscan)
const hi = Math.max(top, target) + vp + overscan
start = Math.max(0, Math.min(n - 1, upperBound(offsets, lo) - 1))
end = Math.max(start + 1, Math.min(n, upperBound(offsets, hi)))
}
}
@ -183,7 +204,7 @@ export function useVirtualHistory(
// 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 && shouldSetVirtualClamp({ itemCount: n, sticky, viewportHeight: vp })) {
if (s && shouldSetVirtualClamp({ itemCount: n, liveTailActive, sticky, viewportHeight: vp })) {
const min = offsets[start] ?? 0
const max = Math.max(min, (offsets[end] ?? total) - vp)
s.setClampBounds(min, max)
@ -235,7 +256,7 @@ export function useVirtualHistory(
if (dirty) {
setVer(v => v + 1)
}
}, [end, hasScrollRef, items, n, offsets, scrollRef, start, sticky, total, vp])
}, [end, hasScrollRef, items, liveTailActive, n, offsets, recentManual, scrollRef, start, sticky, total, vp])
return {
bottomSpacer: Math.max(0, total - (offsets[end] ?? total)),