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1 ;;; undigest.el --- digest-cracking support for the RMAIL mail reader
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2
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3 ;; Copyright (C) 1985, 1986, 1994 Free Software Foundation, Inc.
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4
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5 ;; Maintainer: FSF
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6 ;; Keywords: mail
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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22 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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23
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24 ;;; Synched up with: FSF 19.30.
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25
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26 ;;; Commentary:
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27
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28 ;; See Internet RFC 934
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29
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30 ;;; Code:
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31
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32 (require 'rmail)
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33
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34 (defun undigestify-rmail-message ()
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35 "Break up a digest message into its constituent messages.
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36 Leaves original message, deleted, before the undigestified messages."
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37 (interactive)
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38 (widen)
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39 (let ((buffer-read-only nil)
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40 (msg-string (buffer-substring (rmail-msgbeg rmail-current-message)
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41 (rmail-msgend rmail-current-message))))
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42 (goto-char (rmail-msgend rmail-current-message))
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43 (narrow-to-region (point) (point))
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44 (insert msg-string)
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45 (narrow-to-region (point-min) (1- (point-max))))
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46 (let ((error t)
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47 (buffer-read-only nil))
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48 (unwind-protect
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49 (progn
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50 (save-restriction
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51 (goto-char (point-min))
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52 (delete-region (point-min)
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53 (progn (search-forward "\n*** EOOH ***\n")
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54 (point)))
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55 (insert "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
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56 (narrow-to-region (point)
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57 (point-max))
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58 (let* ((fill-prefix "")
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59 (case-fold-search t)
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60 start
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61 (digest-name
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62 (mail-strip-quoted-names
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63 (or (save-restriction
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64 (search-forward "\n\n")
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65 (setq start (point))
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66 (narrow-to-region (point-min) (point))
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67 (goto-char (point-max))
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68 (or (mail-fetch-field "Reply-To")
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69 (mail-fetch-field "To")
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70 (mail-fetch-field "Apparently-To")
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71 (mail-fetch-field "From")))
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72 (error "Message is not a digest--bad header")))))
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73 (save-excursion
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74 (goto-char (point-max))
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75 (skip-chars-backward " \t\n")
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76 (let (found)
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77 ;; compensate for broken un*x digestifiers. Sigh Sigh.
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78 (while (and (> (point) start) (not found))
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79 (forward-line -1)
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80 (if (looking-at (concat "End of.*Digest.*\n"
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81 (regexp-quote "*********") "*"
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82 "\\(\n------*\\)*"))
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83 (setq found t)))
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84 (if (not found)
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85 (error "Message is not a digest--no end line"))))
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86 (re-search-forward (concat "^" (make-string 55 ?-) "-*\n*"))
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87 (replace-match "\^_\^L\n0, unseen,,\n*** EOOH ***\n")
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88 (save-restriction
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89 (narrow-to-region (point)
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90 (progn (search-forward "\n\n")
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91 (point)))
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92 (if (mail-fetch-field "To") nil
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93 (goto-char (point-min))
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94 (insert "To: " digest-name "\n")))
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95 (while (re-search-forward
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96 (concat "\n\n" (make-string 27 ?-) "-*\n*")
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97 nil t)
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98 (replace-match "\n\n\^_\^L\n0, unseen,,\n*** EOOH ***\n")
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99 (save-restriction
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100 (if (looking-at "End ")
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101 (insert "To: " digest-name "\n\n")
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102 (narrow-to-region (point)
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103 (progn (search-forward "\n\n"
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104 nil 'move)
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105 (point))))
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106 (if (mail-fetch-field "To")
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107 nil
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108 (goto-char (point-min))
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109 (insert "To: " digest-name "\n")))
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110 ;; Digestifiers may insert `- ' on lines that start with `-'.
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111 ;; Undo that.
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112 (save-excursion
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113 (goto-char (point-min))
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114 (if (re-search-forward
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115 "\n\n----------------------------*\n*"
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116 nil t)
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117 (let ((end (point-marker)))
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118 (goto-char (point-min))
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119 (while (re-search-forward "^- " end t)
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120 (delete-char -2)))))
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121 )))
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122 (setq error nil)
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123 (message "Message successfully undigestified")
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124 (let ((n rmail-current-message))
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125 (rmail-forget-messages)
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126 (rmail-show-message n)
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127 (rmail-delete-forward)
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128 (if (rmail-summary-exists)
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129 (rmail-select-summary
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130 (rmail-update-summary)))))
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131 (cond (error
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132 (narrow-to-region (point-min) (1+ (point-max)))
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133 (delete-region (point-min) (point-max))
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134 (rmail-show-message rmail-current-message))))))
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135
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136 ;;; undigest.el ends here
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