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# Edit the command line using your usual editor.
# Binding this to 'v' in the vi command mode map,
#   autoload -Uz edit-command-line
#   zle -N edit-command-line
#   bindkey -M vicmd v edit-command-line
# will give ksh-like behaviour for that key,
# except that it will handle multi-line buffers properly.

() {
  exec </dev/tty

  # Open the editor, placing the cursor at the right place if we know how.
  local editor=${${VISUAL:-${EDITOR:-vi}}}
  integer byteoffset=$(( $#PREBUFFER + $#LBUFFER + 1 ))
  case $editor in 
    (*vim*) ${=editor} -c "normal! ${byteoffset}go" -- $1;;
    (*emacs*) ${=editor} $1 -eval "(goto-char ${byteoffset})";;
    (*) ${=editor} $1;;
  esac

  # Replace the buffer with the editor output.
  print -Rz - "$(<$1)" 
} =(<<<"$PREBUFFER$BUFFER")

zle send-break		# Force reload from the buffer stack