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metamail.el
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1993-06-21
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;;; Metamail interface for GNU Emacs
;; Copyright (C) 1993 Masanobu UMEDA
;; Author: Masanobu UMEDA <umerin@mse.kyutech.ac.jp>
;; Version: $Header: metamail.el,v 1.3 93/06/21 15:37:28 umerin Exp $
;; Keywords: mail, news, mime, multimedia
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;;; Commentary:
;; LCD Archive Entry:
;; metamail|Masanobu UMEDA|umerin@mse.kyutech.ac.jp|
;; Metamail interface for GNU Emacs|
;; $Date: 93/06/21 15:37:28 $|$Revision: 1.3 $|~/misc/metamail.el.Z|
;; Note: Metamail does not have all options which is compatible with
;; the environment variables. For that reason, matamail.el have to
;; hack the environment variables. In addition, there is no way to
;; display all header fields without extra informative body messages
;; which is suppressed by "-q" option.
;; The idea of using metamail to process MIME messages is from
;; gnus-mime.el by Spike <Spike@world.std.com>.
;;; Code:
(defvar metamail-program-name "metamail"
"*Metamail program name.")
(defvar metamail-environment "KEYHEADS='*';export KEYHEADS;"
"*Environment variables for Metamail.
It must be an emtpy string or a string terminated with ';'.")
(defvar metamail-switches '("-m" "emacs" "-x" "-d" "-z")
"*Switches for Metamail program.
-z is required to remove zap file.")
(defun metamail-buffer (&optional buffer)
"Process current buffer through 'metamail'.
Optional argument BUFFER specifies a buffer to be filled (nil means current)."
(interactive)
(metamail-region (point-min) (point-max) buffer))
(defun metamail-region (beg end &optional buffer)
"Process current region through 'metamail'.
Optional argument BUFFER specifies a buffer to be filled (nil means current)."
(interactive "r")
(let ((curbuf (current-buffer))
(buffer-read-only nil)
(metafile (make-temp-name "/tmp/metamail")))
(save-excursion
;; Gee! Metamail does not ouput to stdout if input comes from
;; stdin.
(write-region beg end metafile nil 'nomessage)
(if buffer
(set-buffer buffer))
(setq buffer-read-only nil)
;; Clear destination buffer.
(if (eq curbuf (current-buffer))
(delete-region beg end)
(delete-region (point-min) (point-max)))
;; We have to pass the environment variable KEYHEADS to /bin/sh
;; to display all header fields. Metamail should have an
;; optional argument to pass such information directly.
(apply (function call-process)
"/bin/sh"
nil
t ;Output to current buffer
t ;Force redisplay
(list "-c"
;; Construct environment and the command.
(concat
metamail-environment
metamail-program-name
" "
(mapconcat (function identity) metamail-switches " ")
" "
metafile
)))
)))
;(defun metamail-region (beg end &optional buffer)
; "Process current region through 'metamail'.
;Optional argument BUFFER specifies a buffer to be filled (nil means current)."
; (interactive "r")
; (let ((curbuf (current-buffer))
; (buffer-read-only nil)
; (metafile (make-temp-name "/tmp/metamail")))
; (save-excursion
; (write-region (point-min) (point-max) metafile nil 'nomessage)
; (if (eq curbuf
; (if buffer (get-buffer buffer) (current-buffer)))
; (delete-region (point-min) (point-max)))
; (apply (function call-process)
; metamail-program-name
; nil
; (or buffer t) ;BUFFER or current buffer
; nil ;don't redisplay
; (append metamail-switches (list metafile)))
; )))
(provide 'metamail)
;;; metamail.el ends here