Function computeInputLayoutMetrics

cli/src/utils/text-layout.ts:113–149

({
  layoutContent,
  cursorProbe,
  cols,
  maxHeight,
  minHeight = 1,
}: {
  layoutContent: string
  cursorProbe: string
  cols: number
  maxHeight: number
  minHeight?: number
})

}

export function computeInputLayoutMetrics({
  layoutContent,
  cursorProbe,
  cols,
  maxHeight,
  minHeight = 1,
}: {
  layoutContent: string
  cursorProbe: string
  cols: number
  maxHeight: number
  minHeight?: number
}): { heightLines: number; gutterEnabled: boolean } {
  const safeMaxHeight = Math.max(1, maxHeight)
  const effectiveMinHeight = Math.max(
    1,
    Math.min(minHeight ?? 1, safeMaxHeight),
  )
  const totalLines = measureLines(layoutContent, cols)
  const cursorLines = measureLines(cursorProbe, cols)

  // Add bottom gutter when cursor is on line 2 of exactly 2 lines
  const gutterEnabled =
    totalLines === 2 && cursorLines === 2 && totalLines + 1 <= safeMaxHeight

  const rawHeight = Math.min(
    totalLines + (gutterEnabled ? 1 : 0),
    safeMaxHeight,
  )

  const heightLines = Math.max(effectiveMinHeight, rawHeight)

  return {
    heightLines,
    gutterEnabled,
  }
}