Function resolveVirtualScrollColdStartCount

src/hooks/useVirtualScroll.ts:120–145

({
  previousViewportHeight,
  terminalRows = 0,
  coldStartCount = COLD_START_COUNT,
}: {
  previousViewportHeight: number
  terminalRows?: number
  coldStartCount?: number
})

}

export function resolveVirtualScrollColdStartCount({
  previousViewportHeight,
  terminalRows = 0,
  coldStartCount = COLD_START_COUNT,
}: {
  previousViewportHeight: number
  terminalRows?: number
  coldStartCount?: number
}): number {
  if (previousViewportHeight > 0) {
    return Math.min(
      coldStartCount,
      Math.max(12, Math.ceil(previousViewportHeight) + 6),
    )
  }

  if (terminalRows > 0) {
    // Long-history transcript entry is dominated by the first viewportH=0
    // mount. Before ScrollBox lays out, Ink already knows the real terminal
    // height; using it here avoids over-mounting the historical 30-row tail
    // for giant rendered file/code blocks the user cannot see on frame 0.
    return Math.min(coldStartCount, Math.max(12, Math.ceil(terminalRows)))
  }

  return coldStartCount
}

export function computeVirtualScrollColdStartRange({
  itemKeys,