zsh_with_vim

bindkey "^v"                edit_command_line

edit_command_line () {
  # edit current line in $EDITOR
  local tmpfile=${TMPPREFIX:-/tmp/zsh}ecl$$

  print -R - "$PREBUFFER$BUFFER" >$tmpfile
  exec </dev/tty
  ${VISUAL:-${EDITOR:-vi}} $tmpfile
  zle kill-buffer
  BUFFER=${"$(<$tmpfile)"/$PREBUFFER/}
  CURSOR=$#BUFFER

  command rm -f $tmpfile
  zle redisplay
}
zle -N edit_command_line