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236 lines
8.5 KiB
EmacsLisp
236 lines
8.5 KiB
EmacsLisp
;;; mh-mime --- mh-e support for composing MIME messages
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;; Time-stamp: <95/04/20 19:16:22 gildea>
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;; Copyright (C) 1993, 1995 Free Software Foundation, Inc.
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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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;;; Internal support for mh-e package.
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;;; Support for generating an mhn composition file.
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;;; MIME is supported only by MH 6.8 or later.
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;;; Change Log:
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;; $Id: mh-mime.el,v 1.3 1995/04/10 00:20:00 kwzh Exp kwzh $
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;;; Code:
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(provide 'mh-mime)
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(require 'mh-comp)
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;; To do:
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;; paragraph code should not fill # lines if MIME enabled.
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;; implement mh-auto-edit-mhn (if non-nil, \\[mh-send-letter]
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;; invokes mh-edit-mhn automatically before sending.)
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;; actually, instead of mh-auto-edit-mhn,
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;; should read automhnproc from profile
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;; MIME option to mh-forward
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;; command to move to content-description insertion point
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(defvar mh-mhn-args nil
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"Extra arguments to have \\[mh-edit-mhn] pass to the \"mhn\" command.
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The arguments are passed to mhn if \\[mh-edit-mhn] is given a
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prefix argument. Normally default arguments to mhn are specified in the
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MH profile.")
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(defvar mh-edit-mhn-hook nil
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"Invoked on the formatted letter by \\<mh-letter-mode-map>\\[mh-edit-mhn].")
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;;;###autoload
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(defvar mh-mime-content-types
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'(("text/plain") ("text/richtext")
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("multipart/mixed") ("multipart/alternative") ("multipart/digest")
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("multipart/parallel")
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("message/rfc822") ("message/partial") ("message/external-body")
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("application/octet-stream") ("application/postscript")
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("image/jpeg") ("image/gif")
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("audio/basic")
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("video/mpeg"))
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"Legal MIME content types. See documentation for \\[mh-edit-mhn].")
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(defun mh-mhn-compose-insertion (pathname type description)
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"Add a directive to insert a MIME message part from a file.
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This is the typical way to insert non-text parts in a message.
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Arguments are PATHNAME, which tells where to find the file, TYPE, the
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MIME content type, and DESCRIPTION, a line of text for the
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Content-description header. See also \\[mh-edit-mhn]."
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(interactive (list
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(read-file-name "Insert contents of: ")
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(completing-read "Content-type: "
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mh-mime-content-types nil nil nil)
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(read-string "Content-description: ")))
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(mh-mhn-compose-type pathname type description))
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(defun mh-mhn-compose-type (pathname type
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&optional description attributes comment)
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(beginning-of-line)
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(insert "#" type)
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(and attributes
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(insert "; " attributes))
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(and comment
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(insert " (" comment ")"))
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(insert " [")
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(and description
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(insert description))
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(insert "] " (expand-file-name pathname))
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(insert "\n"))
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(defun mh-mhn-compose-anon-ftp (host pathname type description)
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"Add a directive for a MIME anonymous ftp external body part.
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This directive tells MH to include a reference to a
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message/external-body part retrievable by anonymous FTP. Arguments
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are HOST and PATHNAME, which tell where to find the file, TYPE, the
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MIME content type, and DESCRIPTION, a line of text for the
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Content-description header. See also \\[mh-edit-mhn]."
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(interactive (list
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(read-string "Remote host: ")
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(read-string "Remote pathname: ")
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(completing-read "External Content-type: "
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mh-mime-content-types nil nil nil)
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(read-string "External Content-description: ")))
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(mh-mhn-compose-external-type "anon-ftp" host pathname
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type description))
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(defun mh-mhn-compose-external-compressed-tar (host pathname description)
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"Add a directive to include a MIME reference to a compressed tar file.
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The file should be available via anonymous ftp. This directive
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tells MH to include a reference to a message/external-body part.
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Arguments are HOST and PATHNAME, which tell where to find the file, and
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DESCRIPTION, a line of text for the Content-description header.
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See also \\[mh-edit-mhn]."
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(interactive (list
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(read-string "Remote host: ")
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(read-string "Remote pathname: ")
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(read-string "Tar file Content-description: ")))
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(mh-mhn-compose-external-type "anon-ftp" host pathname
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"application/octet-stream"
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description
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"type=tar; conversions=x-compress"
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"mode=image"))
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(defun mh-mhn-compose-external-type (access-type host pathname type
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&optional description
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attributes extra-params comment)
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(beginning-of-line)
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(insert "#@" type)
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(and attributes
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(insert "; " attributes))
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(and comment
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(insert " (" comment ") "))
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(insert " [")
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(and description
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(insert description))
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(insert "] ")
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(insert "access-type=" access-type "; ")
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(insert "site=" host)
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(insert "; name=" (file-name-nondirectory pathname))
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(insert "; directory=\"" (file-name-directory pathname) "\"")
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(and extra-params
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(insert "; " extra-params))
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(insert "\n"))
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(defun mh-mhn-compose-forw (&optional description folder messages)
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"Add a forw directive to this message, to forward a message with MIME.
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This directive tells MH to include the named messages in this one.
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Arguments are DESCRIPTION, a line of text for the Content-description header,
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and FOLDER and MESSAGES, which name the message(s) to be forwarded.
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See also \\[mh-edit-mhn]."
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(interactive (list
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(read-string "Forw Content-description: ")
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(mh-prompt-for-folder "Message from" mh-sent-from-folder nil)
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(read-string (format "Messages%s: "
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(if mh-sent-from-msg
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(format " [%d]" mh-sent-from-msg)
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"")))))
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(beginning-of-line)
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(insert "#forw [")
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(and description
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(not (string= description ""))
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(insert description))
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(insert "]")
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(and folder
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(not (string= folder ""))
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(insert " " folder))
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(if (and messages
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(not (string= messages "")))
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(let ((start (point)))
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(insert " " messages)
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(subst-char-in-region start (point) ?, ? ))
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(if mh-sent-from-msg
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(insert " " (int-to-string mh-sent-from-msg))))
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(insert "\n"))
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(defun mh-edit-mhn (&optional extra-args)
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"Format the current draft for MIME, expanding any mhn directives.
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Process the current draft with the mhn program, which,
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using directives already inserted in the draft, fills in
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all the MIME components and header fields.
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This step should be done last just before sending the message.
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The mhn program is part of MH version 6.8 or later.
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The `\\[mh-revert-mhn-edit]' command undoes this command.
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The arguments in the list `mh-mhn-args' are passed to mhn
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if this function is passed an argument.
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For assistance with creating mhn directives to insert
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various types of components in a message, see
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\\[mh-mhn-compose-insertion] (generic insertion from a file),
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\\[mh-mhn-compose-anon-ftp] (external reference to file via anonymous ftp),
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\\[mh-mhn-compose-external-compressed-tar] \
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\(reference to compressed tar file via anonymous ftp), and
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\\[mh-mhn-compose-forw] (forward message)."
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(interactive "*P")
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(save-buffer)
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(message "mhn editing...")
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(mh-exec-cmd-error (format "mhdraft=%s" buffer-file-name)
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"mhn" (if extra-args mh-mhn-args) buffer-file-name)
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(revert-buffer t t)
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(message "mhn editing...done")
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(run-hooks 'mh-edit-mhn-hook))
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(defun mh-revert-mhn-edit (noconfirm)
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"Undoes the effect of \\[mh-edit-mhn] by reverting to the backup file.
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Optional non-nil argument means don't ask for confirmation."
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(interactive "*P")
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(if (null buffer-file-name)
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(error "Buffer does not seem to be associated with any file"))
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(let ((backup-strings '("," "#"))
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backup-file)
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(while (and backup-strings
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(not (file-exists-p
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(setq backup-file
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(concat (file-name-directory buffer-file-name)
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(car backup-strings)
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(file-name-nondirectory buffer-file-name)
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".orig")))))
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(setq backup-strings (cdr backup-strings)))
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(or backup-strings
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(error "mhn backup file for %s no longer exists!" buffer-file-name))
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(or noconfirm
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(yes-or-no-p (format "Revert buffer from file %s? "
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backup-file))
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(error "mhn edit revert not confirmed."))
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(let ((buffer-read-only nil))
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(erase-buffer)
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(insert-file-contents backup-file))
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(after-find-file nil)))
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