cgit.sxemacs.org Git - packages/blob - xemacs-packages/rmail/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 XEmacs.
   9
  10 ;; XEmacs is free software; you can redistribute it and/or modify it
  11 ;; 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 ;; XEmacs is distributed in the hope that it will be useful, but
  16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 ;; General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with XEmacs; 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 ;;; Synched up with: FSF 19.30.
  26
  27 ;;; Commentary:
  28
  29 ;; See Internet RFC 934
  30
  31 ;;; Code:
  32
  33 (require 'rmail)
  34
  35 (defun undigestify-rmail-message ()
  36   "Break up a digest message into its constituent messages.
  37 Leaves original message, deleted, before the undigestified messages."
  38   (interactive)
  39   (widen)
  40   (let ((buffer-read-only nil)
  41         (msg-string (buffer-substring (rmail-msgbeg rmail-current-message)
  42                                       (rmail-msgend rmail-current-message))))
  43     (goto-char (rmail-msgend rmail-current-message))
  44     (narrow-to-region (point) (point))
  45     (insert msg-string)
  46     (narrow-to-region (point-min) (1- (point-max))))
  47   (let ((error t)
  48         (buffer-read-only nil))
  49     (unwind-protect
  50         (progn
  51           (save-restriction
  52             (goto-char (point-min))
  53             (delete-region (point-min)
  54                            (progn (search-forward "\n*** EOOH ***\n")
  55                                   (point)))
  56             (insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  57             (narrow-to-region (point)
  58                               (point-max))
  59             (let* ((fill-prefix "")
  60                    (case-fold-search t)
  61                    start
  62                    (digest-name
  63                     (mail-strip-quoted-names
  64                      (or (save-restriction
  65                            (search-forward "\n\n")
  66                            (setq start (point))
  67                            (narrow-to-region (point-min) (point))
  68                            (goto-char (point-max))
  69                            (or (mail-fetch-field "Reply-To")
  70                                (mail-fetch-field "To")
  71                                (mail-fetch-field "Apparently-To")
  72                                (mail-fetch-field "From")))
  73                          (error "Message is not a digest--bad header")))))
  74               (save-excursion
  75                 (goto-char (point-max))
  76                 (skip-chars-backward " \t\n")
  77                 (let (found)
  78                   ;; compensate for broken un*x digestifiers.  Sigh Sigh.
  79                   (while (and (> (point) start) (not found))
  80                     (forward-line -1)
  81                     (if (looking-at (concat "End of.*Digest.*\n"
  82                                             (regexp-quote "*********") "*"
  83                                             "\\(\n------*\\)*"))
  84                         (setq found t)))
  85                   (if (not found)
  86                       (error "Message is not a digest--no end line"))))
  87               (re-search-forward (concat "^" (make-string 55 ?-) "-*\n*"))
  88               (replace-match "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
  89               (save-restriction
  90                 (narrow-to-region (point)
  91                                   (progn (search-forward "\n\n")
  92                                          (point)))
  93                 (if (mail-fetch-field "To") nil
  94                   (goto-char (point-min))
  95                   (insert "To: " digest-name "\n")))
  96               (while (re-search-forward
  97                       (concat "\n\n" (make-string 27 ?-) "-*\n*")
  98                       nil t)
  99                 (replace-match "\n\n\^_\^L\n0, unseen,,\n*** EOOH ***\n")
 100                 (save-restriction
 101                   (if (looking-at "End ")
 102                       (insert "To: " digest-name "\n\n")
 103                     (narrow-to-region (point)
 104                                       (progn (search-forward "\n\n"
 105                                                              nil 'move)
 106                                              (point))))
 107                   (if (mail-fetch-field "To")
 108                       nil
 109                     (goto-char (point-min))
 110                     (insert "To: " digest-name "\n")))
 111                 ;; Digestifiers may insert `- ' on lines that start with `-'.
 112                 ;; Undo that.
 113                 (save-excursion
 114                   (goto-char (point-min))
 115                   (if (re-search-forward
 116                        "\n\n----------------------------*\n*"
 117                        nil t)
 118                       (let ((end (point-marker)))
 119                         (goto-char (point-min))
 120                         (while (re-search-forward "^- " end t)
 121                           (delete-char -2)))))
 122                 )))
 123           (setq error nil)
 124           (message "Message successfully undigestified")
 125           (let ((n rmail-current-message))
 126             (rmail-forget-messages)
 127             (rmail-show-message n)
 128             (rmail-delete-forward)
 129             (if (rmail-summary-exists)
 130                 (rmail-select-summary
 131                  (rmail-update-summary)))))
 132       (cond (error
 133              (narrow-to-region (point-min) (1+ (point-max)))
 134              (delete-region (point-min) (point-max))
 135              (rmail-show-message rmail-current-message))))))
 136
 137 ;;; undigest.el ends here