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fix(tui): bound virtual history offset searches

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asheriif 2026-05-05 17:19:37 +00:00 • committed by Teknium
parent a345f7b6e5
commit 946ef0ea19
2 changed files with 123 additions and 4 deletions
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8
ui-tui/src/hooks/useVirtualHistory.ts
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@ -51,9 +51,9 @@ const SLIDE_STEP = 12
const NOOP = () => {}
const upperBound = (arr: ArrayLike<number>, target: number) => {
const upperBound = (arr: ArrayLike<number>, target: number, length = arr.length) => {
let lo = 0
let hi = arr.length
let hi = length
while (lo < hi) {
const mid = (lo + hi) >> 1
@ -282,8 +282,8 @@ export function useVirtualHistory(
// Binary search — offsets is monotone. Linear walk was O(n) at n=10k+,
// ~2ms per render during scroll.
start = Math.max(0, Math.min(n - 1, upperBound(offsets, lo) - 1))
end = Math.max(start + 1, Math.min(n, upperBound(offsets, hi)))
start = Math.max(0, Math.min(n - 1, upperBound(offsets, lo, n + 1) - 1))
end = Math.max(start + 1, Math.min(n, upperBound(offsets, hi, n + 1)))
}
}