Function lineWidth

src/ink/line-width-cache.ts:10–24

(line: string)

const MAX_CACHE_SIZE = 4096

export function lineWidth(line: string): number {
  const cached = cache.get(line)
  if (cached !== undefined) return cached

  const width = stringWidth(line)

  // Evict when cache grows too large (e.g. after many different responses).
  // Simple full-clear is fine — the cache repopulates in one frame.
  if (cache.size >= MAX_CACHE_SIZE) {
    cache.clear()
  }

  cache.set(line, width)
  return width
}