func (v *view) prependToKillBuffer(cursor buffer.Cursor, nbytes int) {
kb := *v.ctx.killBuffer
switch v.lastCommand.Cmd {
case vCommandKillWord, vCommandKillWordBackward, vCommandKillRegion, vCommandKillLine:
default:
kb = kb[:0]
}
kb = append(cursor.ExtractBytes(nbytes), kb...)
*v.ctx.killBuffer = kb
}