1 ;;; gnus-registry.el --- article registry for Gnus
3 ;; Copyright (C) 2002-2012 Free Software Foundation, Inc.
5 ;; Author: Ted Zlatanov <tzz@lifelogs.com>
6 ;; Keywords: news registry
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 3 of the License, or
13 ;; (at your option) 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 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25 ;; This is the gnus-registry.el package, which works with all
26 ;; Gnus backends, not just nnmail. The major issue is that it
27 ;; doesn't go across backends, so for instance if an article is in
28 ;; nnml:sys and you see a reference to it in nnimap splitting, the
29 ;; article will end up in nnimap:sys
31 ;; gnus-registry.el intercepts article respooling, moving, deleting,
32 ;; and copying for all backends. If it doesn't work correctly for
33 ;; you, submit a bug report and I'll be glad to fix it. It needs
34 ;; better documentation in the manual (also on my to-do list).
36 ;; If you want to track recipients (and you should to make the
37 ;; gnus-registry splitting work better), you need the To and Cc
38 ;; headers collected by Gnus. Note that in more recent Gnus versions
39 ;; this is already the case: look at `gnus-extra-headers' to be sure.
41 ;; ;;; you may also want Gcc Newsgroups Keywords X-Face
42 ;; (add-to-list 'gnus-extra-headers 'To)
43 ;; (add-to-list 'gnus-extra-headers 'Cc)
44 ;; (setq nnmail-extra-headers gnus-extra-headers)
46 ;; Put this in your startup file (~/.gnus.el for instance) or use Customize:
48 ;; (setq gnus-registry-max-entries 2500
49 ;; gnus-registry-track-extra '(sender subject recipient))
51 ;; (gnus-registry-initialize)
53 ;; Then use this in your fancy-split:
55 ;; (: gnus-registry-split-fancy-with-parent)
57 ;; You should also consider using the nnregistry backend to look up
58 ;; articles. See the Gnus manual for more information.
60 ;; Finally, you can put %uM in your summary line format to show the
61 ;; registry marks if you do this:
63 ;; show the marks as single characters (see the :char property in
64 ;; `gnus-registry-marks'):
65 ;; (defalias 'gnus-user-format-function-M 'gnus-registry-article-marks-to-chars)
67 ;; show the marks by name (see `gnus-registry-marks'):
68 ;; (defalias 'gnus-user-format-function-M 'gnus-registry-article-marks-to-names)
72 ;; - get the correct group on spool actions
74 ;; - articles that are spooled to a different backend should be moved
79 (eval-when-compile (require 'cl))
82 (when (null (ignore-errors (require 'ert)))
83 (defmacro* ert-deftest (name () &body docstring-keys-and-body))))
96 (defvar gnus-adaptive-word-syntax-table)
98 (defvar gnus-registry-dirty t
99 "Boolean set to t when the registry is modified")
101 (defgroup gnus-registry nil
106 (defvar gnus-registry-marks
109 :image "summary_important")
112 :image "summary_work")
115 :image "summary_personal")
118 :image "summary_todo")
121 :image "summary_later"))
123 "List of registry marks and their options.
125 `gnus-registry-mark-article' will offer symbols from this list
128 Each entry must have a character to be useful for summary mode
129 line display and for keyboard shortcuts.
131 Each entry must have an image string to be useful for visual
134 (defcustom gnus-registry-default-mark 'To-Do
135 "The default mark. Should be a valid key for `gnus-registry-marks'."
136 :group 'gnus-registry
139 (defcustom gnus-registry-unfollowed-addresses
140 (list (regexp-quote user-mail-address))
141 "List of addresses that gnus-registry-split-fancy-with-parent won't trace.
142 The addresses are matched, they don't have to be fully qualified.
143 In the messages, these addresses can be the sender or the
146 :group 'gnus-registry
147 :type '(repeat regexp))
149 (defcustom gnus-registry-unfollowed-groups
150 '("delayed$" "drafts$" "queue$" "INBOX$" "^nnmairix:" "archive")
151 "List of groups that gnus-registry-split-fancy-with-parent won't return.
152 The group names are matched, they don't have to be fully
153 qualified. This parameter tells the Gnus registry 'never split a
154 message into a group that matches one of these, regardless of
157 nnmairix groups are specifically excluded because they are ephemeral."
158 :group 'gnus-registry
159 :type '(repeat regexp))
161 (defcustom gnus-registry-install 'ask
162 "Whether the registry should be installed."
163 :group 'gnus-registry
164 :type '(choice (const :tag "Never Install" nil)
165 (const :tag "Always Install" t)
166 (const :tag "Ask Me" ask)))
168 (defvar gnus-registry-enabled nil)
170 (defvar gnus-summary-misc-menu) ;; Avoid byte compiler warning.
172 (defvar gnus-registry-misc-menus nil) ; ugly way to keep the menus
174 (make-obsolete-variable 'gnus-registry-clean-empty nil "23.4")
175 (make-obsolete-variable 'gnus-registry-use-long-group-names nil "23.4")
176 (make-obsolete-variable 'gnus-registry-max-track-groups nil "23.4")
177 (make-obsolete-variable 'gnus-registry-entry-caching nil "23.4")
178 (make-obsolete-variable 'gnus-registry-trim-articles-without-groups nil "23.4")
180 (defcustom gnus-registry-track-extra '(subject sender recipient)
181 "Whether the registry should track extra data about a message.
182 The subject, recipients (To: and Cc:), and Sender (From:) headers
183 are tracked this way by default."
184 :group 'gnus-registry
186 '(set :tag "Tracking choices"
187 (const :tag "Track by subject (Subject: header)" subject)
188 (const :tag "Track by recipient (To: and Cc: headers)" recipient)
189 (const :tag "Track by sender (From: header)" sender)))
191 (defcustom gnus-registry-split-strategy nil
192 "The splitting strategy applied to the keys in `gnus-registry-track-extra'.
194 Given a set of unique found groups G and counts for each element
195 of G, and a key K (typically 'sender or 'subject):
197 When nil, if G has only one element, use it. Otherwise give up.
198 This is the fastest but also least useful strategy.
200 When 'majority, use the majority by count. So if there is a
201 group with the most articles counted by K, use that. Ties are
202 resolved in no particular order, simply the first one found wins.
203 This is the slowest strategy but also the most accurate one.
205 When 'first, the first element of G wins. This is fast and
206 should be OK if your senders and subjects don't \"bleed\" across
208 :group 'gnus-registry
210 '(choice :tag "Splitting strategy"
211 (const :tag "Only use single choices, discard multiple matches" nil)
212 (const :tag "Majority of matches wins" majority)
213 (const :tag "First found wins" first)))
215 (defcustom gnus-registry-minimum-subject-length 5
216 "The minimum length of a subject before it's considered trackable."
217 :group 'gnus-registry
220 (defcustom gnus-registry-extra-entries-precious '(mark)
221 "What extra keys are precious, meaning entries with them won't get pruned.
222 By default, 'mark is included, so articles with marks are
225 Before you save the Gnus registry, it's pruned. Any entries with
226 keys in this list will not be pruned. All other entries go to
228 :group 'gnus-registry
229 :type '(repeat symbol))
231 (defcustom gnus-registry-cache-file
233 (or gnus-dribble-directory gnus-home-directory "~/")
234 ".gnus.registry.eioio")
235 "File where the Gnus registry will be stored."
236 :group 'gnus-registry
239 (defcustom gnus-registry-max-entries nil
240 "Maximum number of entries in the registry, nil for unlimited."
241 :group 'gnus-registry
242 :type '(radio (const :format "Unlimited " nil)
243 (integer :format "Maximum number: %v")))
245 (defcustom gnus-registry-max-pruned-entries nil
246 "Maximum number of pruned entries in the registry, nil for unlimited."
248 :group 'gnus-registry
249 :type '(radio (const :format "Unlimited " nil)
250 (integer :format "Maximum number: %v")))
252 (defun gnus-registry-fixup-registry (db)
254 (let ((old (oref db :tracked)))
256 (append gnus-registry-extra-entries-precious
259 (or gnus-registry-max-entries
260 most-positive-fixnum))
261 (oset db :prune-factor
264 (or gnus-registry-max-pruned-entries
265 most-positive-fixnum))
267 (append gnus-registry-track-extra
268 '(mark group keyword)))
269 (when (not (equal old (oref db :tracked)))
270 (gnus-message 9 "Reindexing the Gnus registry (tracked change)")
271 (registry-reindex db))))
274 (defun gnus-registry-make-db (&optional file)
275 (interactive "fGnus registry persistence file: \n")
276 (gnus-registry-fixup-registry
279 :file (or file gnus-registry-cache-file)
280 ;; these parameters are set in `gnus-registry-fixup-registry'
281 :max-hard most-positive-fixnum
282 :max-soft most-positive-fixnum
286 (defvar gnus-registry-db (gnus-registry-make-db)
287 "*The article registry by Message ID. See `registry-db'")
289 ;; top-level registry data management
290 (defun gnus-registry-remake-db (&optional forsure)
291 "Remake the registry database after customization.
292 This is not required after changing `gnus-registry-cache-file'."
293 (interactive (list (y-or-n-p "Remake and CLEAR the Gnus registry? ")))
295 (gnus-message 4 "Remaking the Gnus registry")
296 (setq gnus-registry-db (gnus-registry-make-db))))
298 (defun gnus-registry-read ()
299 "Read the registry cache file."
301 (let ((file gnus-registry-cache-file))
304 (gnus-message 5 "Reading Gnus registry from %s..." file)
305 (setq gnus-registry-db (gnus-registry-fixup-registry