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 the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; See Internet RFC 934
  28
  29 ;;; Code:
  30
  31 (require 'rmail)
  32
  33 (defun undigestify-rmail-message ()
  34   "Break up a digest message into its constituent messages.
  35 Leaves original message, deleted, before the undigestified messages."
  36   (interactive)
  37   (widen)
  38   (let ((buffer-read-only nil)
  39         (msg-string (buffer-substring (rmail-msgbeg rmail-current-message)
  40                                       (rmail-msgend rmail-current-message))))
  41     (goto-char (rmail-msgend rmail-current-message))
  42     (narrow-to-region (point) (point))
  43     (insert msg-string)
  44     (narrow-to-region (point-min) (1- (point-max))))
  45   (let ((error t)
  46         (buffer-read-only nil))
  47     (unwind-protect
  48         (progn
  49           (save-restriction
  50             (goto-char (point-min))
  51             (delete-region (point-min)
  52                            (progn (search-forward "\n*** EOOH ***\n")
  53                                   (point)))
  54             (insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  55             (narrow-to-region (point)
  56                               (point-max))
  57             (let* ((fill-prefix "")
  58                    (case-fold-search t)
  59                    start
  60                    (digest-name
  61                     (mail-strip-quoted-names
  62                      (or (save-restriction
  63                            (search-forward "\n\n")
  64                            (setq start (point))
  65                            (narrow-to-region (point-min) (point))
  66                            (goto-char (point-max))
  67                            (or (mail-fetch-field "Reply-To")
  68                                (mail-fetch-field "To")
  69                                (mail-fetch-field "Apparently-To")
  70                                (mail-fetch-field "From")))
  71                          (error "Message is not a digest--bad header")))))
  72               (save-excursion
  73                 (goto-char (point-max))
  74                 (skip-chars-backward " \t\n")
  75                 (let (found)
  76                   ;; compensate for broken un*x digestifiers.  Sigh Sigh.
  77                   (while (and (> (point) start) (not found))
  78                     (forward-line -1)
  79                     (if (looking-at (concat "End of.*Digest.*\n"
  80                                             (regexp-quote "*********") "*"
  81                                             "\\(\n------*\\)*"))
  82                         (setq found t)))
  83                   (if (not found)
  84                       (error "Message is not a digest--no end line"))))
  85               (re-search-forward (concat "^" (make-string 55 ?-) "-*\n*"))
  86               (replace-match "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  87               (save-restriction
  88                 (narrow-to-region (point)
  89                                   (progn (search-forward "\n\n")
  90                                          (point)))
  91                 (if (mail-fetch-field "To") nil
  92                   (goto-char (point-min))
  93                   (insert "To: " digest-name "\n")))
  94               (while (re-search-forward
  95                       (concat "\n\n" (make-string 27 ?-) "-*\n*")
  96                       nil t)
  97                 (replace-match "\n\n\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  98                 (save-restriction
  99                   (if (looking-at "End ")
 100                       (insert "To: " digest-name "\n\n")
 101                     (narrow-to-region (point)
 102                                       (progn (search-forward "\n\n"
 103                                                              nil 'move)
 104                                              (point))))
 105                   (if (mail-fetch-field "To")
 106                       nil
 107                     (goto-char (point-min))
 108                     (insert "To: " digest-name "\n")))
 109                 ;; Digestifiers may insert `- ' on lines that start with `-'.
 110                 ;; Undo that.
 111                 (save-excursion
 112                   (goto-char (point-min))
 113                   (if (re-search-forward
 114                        "\n\n----------------------------*\n*"
 115                        nil t)
 116                       (let ((end (point-marker)))
 117                         (goto-char (point-min))
 118                         (while (re-search-forward "^- " end t)
 119                           (delete-char -2)))))
 120                 )))
 121           (setq error nil)
 122           (message "Message successfully undigestified")
 123           (let ((n rmail-current-message))
 124             (rmail-forget-messages)
 125             (rmail-show-message n)
 126             (rmail-delete-forward)
 127             (if (rmail-summary-exists)
 128                 (rmail-select-summary
 129                  (rmail-update-summary)))))
 130       (cond (error
 131              (narrow-to-region (point-min) (1+ (point-max)))
 132              (delete-region (point-min) (point-max))
 133              (rmail-show-message rmail-current-message))))))
 134
 135 ;;; undigest.el ends here