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1 ;;; mail-hist.el --- Headers and message body history for outgoing mail.
2 ;; Copyright (C) 1994 Free Software Foundation, Inc.
4 ;; Author: Karl Fogel <kfogel@cs.oberlin.edu>
5 ;; Created: March, 1994
6 ;; Keywords: mail, history
8 ;; This file is part of GNU Emacs.
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.
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.
20 ;;; Commentary:
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to
24 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 ;; Thanks to Jim Blandy for mentioning ring.el. It saved a lot of
27 ;; time.
28 ;;
29 ;; To use this package, put it in a directory in your load-path, and
30 ;; put this in your .emacs file:
31 ;;
32 ;; (load "mail-hist" nil t)
33 ;;
34 ;; Or you could do it with autoloads and hooks in your .emacs:
35 ;;
36 ;; (add-hook 'mail-mode-hook 'mail-hist-define-keys)
37 ;; (add-hook 'mail-send-hook 'mail-hist-put-headers-into-history)
38 ;; (add-hook 'vm-mail-mode-hook 'mail-hist-define-keys) ;or rmail, etc
39 ;; (autoload 'mail-hist-define-keys "mail-hist")
40 ;; (autoload 'mail-hist-put-headers-into-history "mail-hist")
41 ;;
42 ;; Once it's installed, use M-p and M-n from mail headers to recover
43 ;; previous/next contents in the history for that header, or, in the
44 ;; body of the message, to recover previous/next text of the message.
45 ;; This only applies to outgoing mail -- mail-hist ignores received
46 ;; messages.
47 ;;
48 ;; Although repeated history requests do clear out the text from the
49 ;; previous request, an isolated request just inserts its text at
50 ;; point, so that you can mix the histories of different messages
51 ;; easily. This might be confusing at times, but there should be no
52 ;; problems that undo can't handle.
53 \f
54 ;;; Code:
57 ;;;###autoload
59 "Define keys for accessing mail header history. For use in hooks."
63 ;;;###autoload
69 "Alist of form (header-name . history-ring).
70 Used for knowing which history list to look in when the user asks for
74 "*The maximum number of elements in a mail field's history.
77 ;;;###autoload
81 ;; For handling repeated history requests
85 ;; (start . end) A pair indicating the buffer positions delimiting the
86 ;; last inserted history, so it can be replaced by a new input if the
87 ;; command is repeated.
91 \f
93 "Get name of mail header point is currently in, without the colon.
94 Returns nil if not in a header, implying that point is in the body of
95 the message."
99 nil t))
100 nil ; then we are in the body of the message
106 nil t)))
112 name-start
113 name-end
117 "Move forward COUNT headers (backward if COUNT is negative).
118 If last/first header is encountered first, stop there and returns
119 nil.
121 Places point on the first non-whitespace on the line following the
122 colon after the header name, or on the second space following that if
123 the header is empty."
127 nil t))))
129 boundary
138 unstopped
141 ;; because the current header will match too.
143 ;; count is negative
146 unstopped
149 ;; we end up behind the header, so must move to the front
151 ;; Now we are right after the colon
153 ;; return nil if didn't go as far as asked, otherwise point
154 unstopped))))
157 "Move to the start of the current header.
158 The start of the current header is defined as one space after the
159 colon, or just after the colon if it is not followed by whitespace."
160 ;; this is slick as all heck:
167 "Get the contents of the mail header in which point is located."
178 "Get HEADER's history ring, or nil if none.
179 HEADER is a string without the colon."
184 "*Don't store any header or body with more than this many characters.
188 "Return t if TEXT does not exceed mail-hist's size limit.
189 The variable `mail-hist-text-size-limit' defines this limit."
194 "Add the contents of HEADER to the header history ring.
195 Optional argument CONTENTS is a string which will be the contents
196 \(instead of whatever's found in the header)."
202 ;; If the ring doesn't exist, we'll have to make it and add it
203 ;; to the mail-header-ring-alist:
210 ;;;###autoload
212 "Put headers and contents of this message into mail header history.
213 Each header has its own independent history, as does the body of the
214 message.
216 This function normally would be called when the message is sent."
218 mail-hist-keep-history
229 nil)
233 \f
235 "Insert the previous contents of this mail header or message body.
236 Moves back through the history of sent mail messages. Each header has
237 its own independent history, as does the body of the message.
239 The history only contains the contents of outgoing messages, not
240 received mail."
265 "Insert next contents of this mail header or message body.
266 Moves back through the history of sent mail messages. Each header has
267 its own independent history, as does the body of the message.
269 Although you can do so, it does not make much sense to call this
270 without having called `mail-hist-previous-header' first
273 The history only contains the contents of outgoing messages, not
274 received mail."
297 \f
300 ;; mail-hist.el ends here