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lisp/mail/metamail.el
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lisp/mail/metamail.el
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;;; metamail.el --- Metamail interface for GNU Emacs
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;; Copyright (C) 1993 Masanobu UMEDA
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;; Author: Masanobu UMEDA <umerin@mse.kyutech.ac.jp>
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;; Version: $Header: metamail.el,v 1.5 93/07/08 21:56:49 umerin Exp $
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;; Keywords: mail, news, mime, multimedia
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;; LCD Archive Entry:
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;; metamail|Masanobu UMEDA|umerin@mse.kyutech.ac.jp|
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;; Metamail interface for GNU Emacs|
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;; $Date: 93/07/08 21:56:49 $|$Revision: 1.5 $|~/misc/metamail.el.Z|
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;; Note: Metamail does not have all options which is compatible with
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;; the environment variables. For that reason, matamail.el have to
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;; hack the environment variables. In addition, there is no way to
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;; display all header fields without extra informative body messages
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;; which is suppressed by "-q" option.
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;; The idea of using metamail to process MIME messages is from
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;; gnus-mime.el by Spike <Spike@world.std.com>.
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;;; Code:
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(defvar metamail-program-name "metamail"
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"*Metamail program name.")
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(defvar metamail-environment '("KEYHEADS=*")
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"*Environment variables passed to `metamail'.
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It must ba a list of strings that have the format ENVVARNAME=VALUE.")
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(defvar metamail-switches '("-m" "emacs" "-x" "-d" "-z")
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"*Switches for `metamail' program.
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-z is required to remove zap file.")
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(defun metamail-buffer (&optional buffer nodisplay)
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"Process current buffer through `metamail'.
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Optional 1st argument BUFFER specifies a buffer to be filled (nil
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means current).
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Optional 2nd argument NODISPLAY non-nil means buffer is not
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redisplayed as output is inserted."
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(interactive)
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(metamail-region (point-min) (point-max) buffer nodisplay))
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(defun metamail-region (beg end &optional buffer nodisplay)
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"Process current region through 'metamail'.
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Optional 1st argument BUFFER specifies a buffer to be filled (nil
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means current).
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Optional 2nd argument NODISPLAY non-nil means buffer is not
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redisplayed as output is inserted."
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(interactive "r")
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(let ((curbuf (current-buffer))
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(buffer-read-only nil)
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(metafile (make-temp-name "/tmp/metamail")))
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(save-excursion
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;; Gee! Metamail does not ouput to stdout if input comes from
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;; stdin.
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(write-region beg end metafile nil 'nomessage)
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(if buffer
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(set-buffer buffer))
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(setq buffer-read-only nil)
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;; Clear destination buffer.
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(if (eq curbuf (current-buffer))
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(delete-region beg end)
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(delete-region (point-min) (point-max)))
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;; We have to pass the environment variable KEYHEADS to display
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;; all header fields. Metamail should have an optional argument
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;; to pass such information directly.
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(let ((process-environment
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(append metamail-environment process-environment)))
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(apply (function call-process)
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metamail-program-name
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nil
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t ;Output to current buffer
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(not nodisplay) ;Force redisplay
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(append metamail-switches (list metafile))))
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;; `metamail' may not delete the temporary file!
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(condition-case error
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(delete-file metafile)
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(error nil))
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)))
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;(defun metamail-region (beg end &optional buffer)
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; "Process current region through 'metamail'.
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;Optional argument BUFFER specifies a buffer to be filled (nil means current)."
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; (interactive "r")
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; (let ((curbuf (current-buffer))
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; (buffer-read-only nil)
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; (metafile (make-temp-name "/tmp/metamail")))
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; (save-excursion
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; (write-region (point-min) (point-max) metafile nil 'nomessage)
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; (if (eq curbuf
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; (if buffer (get-buffer buffer) (current-buffer)))
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; (delete-region (point-min) (point-max)))
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; (apply (function call-process)
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; metamail-program-name
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; nil
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; (or buffer t) ;BUFFER or current buffer
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; nil ;don't redisplay
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; (append metamail-switches (list metafile)))
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; )))
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(provide 'metamail)
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;;; metamail.el ends here
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