code.delx.au - gnu-emacs/blob - lisp/mail/undigest.el

   1 ;;; undigest.el --- digest-cracking support for the RMAIL mail reader
   2
   3 ;; Copyright (C) 1985, 1986, 1994 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: mail
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ;;; Commentary:
  25
  26 ;; See Internet RFC 934
  27
  28 ;;; Code:
  29
  30 (require 'rmail)
  31
  32 (defun undigestify-rmail-message ()
  33   "Break up a digest message into its constituent messages.
  34 Leaves original message, deleted, before the undigestified messages."
  35   (interactive)
  36   (widen)
  37   (let ((buffer-read-only nil)
  38         (msg-string (buffer-substring (rmail-msgbeg rmail-current-message)
  39                                       (rmail-msgend rmail-current-message))))
  40     (goto-char (rmail-msgend rmail-current-message))
  41     (narrow-to-region (point) (point))
  42     (insert msg-string)
  43     (narrow-to-region (point-min) (1- (point-max))))
  44   (let ((error t)
  45         (buffer-read-only nil))
  46     (unwind-protect
  47         (progn
  48           (save-restriction
  49             (goto-char (point-min))
  50             (delete-region (point-min)
  51                            (progn (search-forward "\n*** EOOH ***\n")
  52                                   (point)))
  53             (insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  54             (narrow-to-region (point)
  55                               (point-max))
  56             (let* ((fill-prefix "")
  57                    (case-fold-search t)
  58                    (digest-name
  59                     (mail-strip-quoted-names
  60                      (or (save-restriction
  61                            (search-forward "\n\n")
  62                            (narrow-to-region (point-min) (point))
  63                            (goto-char (point-max))
  64                            (or (mail-fetch-field "Reply-To")
  65                                (mail-fetch-field "To")
  66                                (mail-fetch-field "Apparently-To")
  67                                (mail-fetch-field "From")))
  68                          (error "Message is not a digest")))))
  69               (save-excursion
  70                 (goto-char (point-max))
  71                 (skip-chars-backward " \t\n")
  72                 (let ((count 10) found)
  73                   ;; compensate for broken un*x digestifiers.  Sigh Sigh.
  74                   (while (and (> count 0) (not found))
  75                     (forward-line -1)
  76                     (setq count (1- count))
  77                     (if (looking-at (concat "End of.*Digest.*\n"
  78                                             (regexp-quote "*********") "*"
  79                                             "\\(\n------*\\)*"))
  80                         (setq found t)))
  81                   (if (not found) (error "Message is not a digest"))))
  82               (re-search-forward (concat "^" (make-string 55 ?-) "-*\n*"))
  83               (replace-match "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  84               (save-restriction
  85                 (narrow-to-region (point)
  86                                   (progn (search-forward "\n\n")
  87                                          (point)))
  88                 (if (mail-fetch-field "To") nil
  89                   (goto-char (point-min))
  90                   (insert "To: " digest-name "\n")))
  91               (while (re-search-forward
  92                       (concat "\n\n" (make-string 27 ?-) "-*\n*")
  93                       nil t)
  94                 (replace-match "\n\n\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  95                 (save-restriction
  96                   (if (looking-at "End ")
  97                       (insert "To: " digest-name "\n\n")
  98                     (narrow-to-region (point)
  99                                       (progn (search-forward "\n\n"
 100                                                              nil 'move)
 101                                              (point))))
 102                   (if (mail-fetch-field "To") nil
 103                     (goto-char (point-min))
 104                     (insert "To: " digest-name "\n"))))))
 105           (setq error nil)
 106           (message "Message successfully undigestified")
 107           (let ((n rmail-current-message))
 108             (rmail-forget-messages)
 109             (rmail-show-message n)
 110             (rmail-delete-forward)
 111             (if (rmail-summary-exists)
 112                 (rmail-select-summary
 113                  (rmail-update-summary)))))
 114       (cond (error
 115              (narrow-to-region (point-min) (1+ (point-max)))
 116              (delete-region (point-min) (point-max))
 117              (rmail-show-message rmail-current-message))))))
 118
 119 ;;; undigest.el ends here