Function cursorDown

cli/src/utils/word-wrap-utils.ts:19–35

(params: {
  lineStarts: number[]
  cursorPosition: number
  desiredIndex: number
})

}

function cursorDown(params: {
  lineStarts: number[]
  cursorPosition: number
  desiredIndex: number
}): number {
  const { lineStarts, cursorPosition, desiredIndex } = params
  const lineIndex = lineStarts.findLastIndex((start) => start <= cursorPosition)

  if (lineIndex === -1 || lineIndex === lineStarts.length - 1) {
    return Infinity
  }

  return Math.min(
    (lineStarts[lineIndex + 2] ?? Infinity) - 1,
    lineStarts[lineIndex + 1] + desiredIndex,
  )
}

export function calculateNewCursorPosition(params: {
  cursorPosition: number