Function executeReplace

src/vim/operators.ts:199–217

(
  char: string,
  count: number,
  ctx: OperatorContext,
)

 * Execute replace character (r command).
 */
export function executeReplace(
  char: string,
  count: number,
  ctx: OperatorContext,
): void {
  let offset = ctx.cursor.offset
  let newText = ctx.text

  for (let i = 0; i < count && offset < newText.length; i++) {
    const graphemeLen = firstGrapheme(newText.slice(offset)).length || 1
    newText =
      newText.slice(0, offset) + char + newText.slice(offset + graphemeLen)
    offset += char.length
  }

  ctx.setText(newText)
  ctx.setOffset(Math.max(0, offset - char.length))
  ctx.recordChange({ type: 'replace', char, count })
}

/**
 * Execute toggle case (~ command).