lisp/mail/undigest.el

   1 ;;; undigest.el --- digest-cracking support for the RMAIL mail reader
   2
   3 ;; Maintainer: FSF
   4 ;; Last-Modified: 14 Jul 1992
   5 ;; Keywords: mail
   6
   7 ;; Copyright (C) 1985, 1986 Free Software Foundation, Inc.
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 2, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  23 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; See Internet RFC 934
  28
  29 ;;; Code:
  30
  31 (defun undigestify-rmail-message ()
  32   "Break up a digest message into its constituent messages.
  33 Leaves original message, deleted, before the undigestified messages."
  34   (interactive)
  35   (widen)
  36   (let ((buffer-read-only nil)
  37         (msg-string (buffer-substring (rmail-msgbeg rmail-current-message)
  38                                       (rmail-msgend rmail-current-message))))
  39     (goto-char (rmail-msgend rmail-current-message))
  40     (narrow-to-region (point) (point))
  41     (insert msg-string)
  42     (narrow-to-region (point-min) (1- (point-max))))
  43   (let ((error t)
  44         (buffer-read-only nil))
  45     (unwind-protect
  46         (progn
  47           (save-restriction
  48             (goto-char (point-min))
  49             (delete-region (point-min)
  50                            (progn (search-forward "\n*** EOOH ***\n")
  51                                   (point)))
  52             (insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  53             (narrow-to-region (point)
  54                               (point-max))
  55             (let* ((fill-prefix "")
  56                    (case-fold-search t)
  57                    (digest-name
  58                     (mail-strip-quoted-names
  59                      (or (save-restriction
  60                            (search-forward "\n\n")
  61                            (narrow-to-region (point-min) (point))
  62                            (goto-char (point-max))
  63                            (or (mail-fetch-field "Reply-To")
  64                                (mail-fetch-field "To")
  65                                (mail-fetch-field "Apparently-To")
  66                                (mail-fetch-field "From")))
  67                          (error "Message is not a digest")))))
  68               (save-excursion
  69                 (goto-char (point-max))
  70                 (skip-chars-backward " \t\n")
  71                 (let ((count 10) found)
  72                   ;; compensate for broken un*x digestifiers.  Sigh Sigh.
  73                   (while (and (> count 0) (not found))
  74                     (forward-line -1)
  75                     (setq count (1- count))
  76                     (if (looking-at (concat "End of.*Digest.*\n"
  77                                             (regexp-quote "*********") "*"
  78                                             "\\(\n------*\\)*"))
  79                         (setq found t)))
  80                   (if (not found) (error "Message is not a digest"))))
  81               (re-search-forward (concat "^" (make-string 55 ?-) "-*\n*"))
  82               (replace-match "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  83               (save-restriction
  84                 (narrow-to-region (point)
  85                                   (progn (search-forward "\n\n")
  86                                          (point)))
  87                 (if (mail-fetch-field "To") nil
  88                   (goto-char (point-min))
  89                   (insert "To: " digest-name "\n")))
  90               (while (re-search-forward
  91                       (concat "\n\n" (make-string 27 ?-) "-*\n*")
  92                       nil t)
  93                 (replace-match "\n\n\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  94                 (save-restriction
  95                   (if (looking-at "End ")
  96                       (insert "To: " digest-name "\n\n")
  97                     (narrow-to-region (point)
  98                                       (progn (search-forward "\n\n"
  99                                                              nil 'move)
 100                                              (point))))
 101                   (if (mail-fetch-field "To") nil
 102                     (goto-char (point-min))
 103                     (insert "To: " digest-name "\n"))))))
 104           (setq error nil)
 105           (message "Message successfully undigestified")
 106           (let ((n rmail-current-message))
 107             (rmail-forget-messages)
 108             (rmail-show-message n)
 109             (rmail-delete-forward)))
 110       (cond (error
 111              (narrow-to-region (point-min) (1+ (point-max)))
 112              (delete-region (point-min) (point-max))
 113              (rmail-show-message rmail-current-message))))))
 114
 115 ;;; undigest.el ends here