Function executePaste

src/vim/operators.ts:294–343

(
  after: boolean,
  count: number,
  ctx: OperatorContext,
)

 * Execute paste (p/P command).
 */
export function executePaste(
  after: boolean,
  count: number,
  ctx: OperatorContext,
): void {
  const register = ctx.getRegister()
  if (!register) return

  const isLinewise = register.endsWith('\n')
  const content = isLinewise ? register.slice(0, -1) : register

  if (isLinewise) {
    const text = ctx.text
    const lines = text.split('\n')
    const { line: currentLine } = ctx.cursor.getPosition()

    const insertLine = after ? currentLine + 1 : currentLine
    const contentLines = content.split('\n')
    const repeatedLines: string[] = []
    for (let i = 0; i < count; i++) {
      repeatedLines.push(...contentLines)
    }

    const newLines = [
      ...lines.slice(0, insertLine),
      ...repeatedLines,
      ...lines.slice(insertLine),
    ]

    const newText = newLines.join('\n')
    ctx.setText(newText)
    ctx.setOffset(getLineStartOffset(newLines, insertLine))
  } else {
    const textToInsert = content.repeat(count)
    const insertPoint =
      after && ctx.cursor.offset < ctx.text.length
        ? ctx.cursor.measuredText.nextOffset(ctx.cursor.offset)
        : ctx.cursor.offset

    const newText =
      ctx.text.slice(0, insertPoint) +
      textToInsert +
      ctx.text.slice(insertPoint)
    const lastGr = lastGrapheme(textToInsert)
    const newOffset = insertPoint + textToInsert.length - (lastGr.length || 1)

    ctx.setText(newText)
    ctx.setOffset(Math.max(insertPoint, newOffset))
  }
}

/**
 * Execute indent (>> command).