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;;; undigest.el --- digest-cracking support for the RMAIL mail reader
;; Copyright (C) 1985, 1986, 1994, 1996 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: mail
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; See Internet RFC 1153
;;; Code:
(require 'rmail)
(defcustom rmail-digest-end-regexps
(list "End of.*Digest.*\n" "End of.*\n")
"*Regexps matching the end of a digest message."
:group 'rmail
:type '(repeat regexp))
;;;###autoload
(defun undigestify-rmail-message ()
"Break up a digest message into its constituent messages.
Leaves original message, deleted, before the undigestified messages."
(interactive)
(with-current-buffer rmail-buffer
(widen)
(let ((buffer-read-only nil)
(msg-string (buffer-substring (rmail-msgbeg rmail-current-message)
(rmail-msgend rmail-current-message))))
(goto-char (rmail-msgend rmail-current-message))
(narrow-to-region (point) (point))
(insert msg-string)
(narrow-to-region (point-min) (1- (point-max))))
(let ((error t)
(buffer-read-only nil))
(unwind-protect
(progn
(save-restriction
(goto-char (point-min))
(delete-region (point-min)
(progn (search-forward "\n*** EOOH ***\n")
(point)))
(insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
(narrow-to-region (point)
(point-max))
(let* ((fill-prefix "")
(case-fold-search t)
start
(digest-name
(mail-strip-quoted-names
(or (save-restriction
(search-forward "\n\n")
(setq start (point))
(narrow-to-region (point-min) (point))
(goto-char (point-max))
(or (mail-fetch-field "Reply-To")
(mail-fetch-field "To")
(mail-fetch-field "Apparently-To")
(mail-fetch-field "From")))
(error "Message is not a digest--bad header")))))
(save-excursion
(let (found
(regexps rmail-digest-end-regexps))
(while (and regexps (not found))
(goto-char (point-max))
;; compensate for broken un*x digestifiers. Sigh Sigh.
(setq found (re-search-backward
(concat "^\\(?:" (car regexps) "\\)")
start t))
(setq regexps (cdr regexps)))
(unless found
(error "Message is not a digest--no end line"))))
(re-search-forward (concat "^" (make-string 55 ?-) "-*\n*"))
(replace-match "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
(save-restriction
(narrow-to-region (point)
(progn (search-forward "\n\n")
(point)))
(if (mail-fetch-field "To") nil
(goto-char (point-min))
(insert "To: " digest-name "\n")))
(while (re-search-forward
(concat "\n\n" (make-string 27 ?-) "-*\n*")
nil t)
(replace-match "\n\n\^_\^L\n0, unseen,,\n*** EOOH ***\n")
(save-restriction
(if (looking-at "End ")
(insert "To: " digest-name "\n\n")
(narrow-to-region (point)
(progn (search-forward "\n\n"
nil 'move)
(point))))
(if (mail-fetch-field "To")
nil
(goto-char (point-min))
(insert "To: " digest-name "\n")))
;; Digestifiers may insert `- ' on lines that start with `-'.
;; Undo that.
(save-excursion
(goto-char (point-min))
(if (re-search-forward
"\n\n----------------------------*\n*"
nil t)
(let ((end (point-marker)))
(goto-char (point-min))
(while (re-search-forward "^- " end t)
(delete-char -2)))))
)))
(setq error nil)
(message "Message successfully undigestified")
(let ((n rmail-current-message))
(rmail-forget-messages)
(rmail-show-message n)
(rmail-delete-forward)
(if (rmail-summary-exists)
(rmail-select-summary
(rmail-update-summary)))))
(cond (error
(narrow-to-region (point-min) (1+ (point-max)))
(delete-region (point-min) (point-max))
(rmail-show-message rmail-current-message)))))))
;;;###autoload
(defun unforward-rmail-message ()
"Extract a forwarded message from the containing message.
This puts the forwarded message into a separate rmail message
following the containing message."
(interactive)
;; If we are in a summary buffer, switch to the Rmail buffer.
(with-current-buffer rmail-buffer
(narrow-to-region (rmail-msgbeg rmail-current-message)
(rmail-msgend rmail-current-message))
(goto-char (point-min))
(let (beg end (buffer-read-only nil) msg-string who-forwarded-it)
(setq who-forwarded-it (mail-fetch-field "From"))
(if (re-search-forward "^----" nil t)
nil
(error "No forwarded message"))
(forward-line 1)
(setq beg (point))
(if (re-search-forward "^----" nil t)
(setq end (match-beginning 0))
(error "No terminator for forwarded message"))
(widen)
(setq msg-string (buffer-substring beg end))
(goto-char (rmail-msgend rmail-current-message))
(narrow-to-region (point) (point))
(insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
(narrow-to-region (point) (point))
(insert "Forwarded-by: " who-forwarded-it "\n")
(insert msg-string)
(goto-char (point-min))
(while (not (eobp))
(if (looking-at "- ")
(delete-region (point) (+ 2 (point))))
(forward-line 1))
(let ((n rmail-current-message))
(rmail-forget-messages)
(rmail-show-message n)
(if (rmail-summary-exists)
(rmail-select-summary
(rmail-update-summary)))))))
(provide 'undigest)
;;; undigest.el ends here
|
