1 ;;; gnus-registry.el --- article registry for Gnus
3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
6 ;; Author: Ted Zlatanov <tzz@lifelogs.com>
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 3, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
28 ;; This is the gnus-registry.el package, which works with all
29 ;; backends, not just nnmail (e.g. NNTP). The major issue is that it
30 ;; doesn't go across backends, so for instance if an article is in
31 ;; nnml:sys and you see a reference to it in nnimap splitting, the
32 ;; article will end up in nnimap:sys
34 ;; gnus-registry.el intercepts article respooling, moving, deleting,
35 ;; and copying for all backends. If it doesn't work correctly for
36 ;; you, submit a bug report and I'll be glad to fix it. It needs
37 ;; documentation in the manual (also on my to-do list).
39 ;; Put this in your startup file (~/.gnus.el for instance)
41 ;; (setq gnus-registry-max-entries 2500
42 ;; gnus-registry-use-long-group-names t)
44 ;; (gnus-registry-initialize)
46 ;; Then use this in your fancy-split:
48 ;; (: gnus-registry-split-fancy-with-parent)
52 ;; - get the correct group on spool actions
54 ;; - articles that are spooled to a different backend should be handled
58 (eval-when-compile (require 'cl))
66 (defvar gnus-adaptive-word-syntax-table)
68 (defvar gnus-registry-dirty t
69 "Boolean set to t when the registry is modified")
71 (defgroup gnus-registry nil
76 (defvar gnus-registry-hashtb (make-hash-table
79 "*The article registry by Message ID.")
81 (defcustom gnus-registry-marks
84 (image . "summary_important"))
87 (image . "summary_work"))
90 (image . "summary_personal"))
93 (image . "summary_todo"))
96 (image . "summary_later")))
98 "List of registry marks and their options.
100 `gnus-registry-mark-article' will offer symbols from this list
103 Each entry must have a character to be useful for summary mode
104 line display and for keyboard shortcuts.
106 Each entry must have an image string to be useful for visual
108 :group 'gnus-registry
109 :type '(alist :key-type symbol
110 :value-type (set :tag "Mark details"
111 (cons :tag "Shortcut"
112 (const :tag "Character code" char)
115 (const :tag "Image" image)
118 (defcustom gnus-registry-default-mark 'To-Do
119 "The default mark. Should be a valid key for `gnus-registry-marks'."
120 :group 'gnus-registry
123 (defcustom gnus-registry-unfollowed-groups
124 '("delayed$" "drafts$" "queue$" "INBOX$")
125 "List of groups that gnus-registry-split-fancy-with-parent won't return.
126 The group names are matched, they don't have to be fully
127 qualified. This parameter tells the Registry 'never split a
128 message into a group that matches one of these, regardless of
130 :group 'gnus-registry
131 :type '(repeat regexp))
133 (defcustom gnus-registry-install nil
134 "Whether the registry should be installed."
135 :group 'gnus-registry
138 (defcustom gnus-registry-clean-empty t
139 "Whether the empty registry entries should be deleted.
140 Registry entries are considered empty when they have no groups
142 :group 'gnus-registry
145 (defcustom gnus-registry-use-long-group-names nil
146 "Whether the registry should use long group names (BUGGY)."
147 :group 'gnus-registry
150 (defcustom gnus-registry-track-extra nil
151 "Whether the registry should track extra data about a message.
152 The Subject and Sender (From:) headers are currently tracked this
154 :group 'gnus-registry
156 '(set :tag "Tracking choices"
157 (const :tag "Track by subject (Subject: header)" subject)
158 (const :tag "Track by sender (From: header)" sender)))
160 (defcustom gnus-registry-entry-caching t
161 "Whether the registry should cache extra information."
162 :group 'gnus-registry
165 (defcustom gnus-registry-minimum-subject-length 5
166 "The minimum length of a subject before it's considered trackable."
167 :group 'gnus-registry
170 (defcustom gnus-registry-trim-articles-without-groups t
171 "Whether the registry should clean out message IDs without groups."
172 :group 'gnus-registry
175 (defcustom gnus-registry-extra-entries-precious '(marks)
176 "What extra entries are precious, meaning they won't get trimmed.
177 When you save the Gnus registry, it's trimmed to be no longer
178 than `gnus-registry-max-entries' (which is nil by default, so no
179 trimming happens). Any entries with extra data in this list (by
180 default, marks are included, so articles with marks are
181 considered precious) will not be trimmed."
182 :group 'gnus-registry
183 :type '(repeat symbol))
185 (defcustom gnus-registry-cache-file
187 (or gnus-dribble-directory gnus-home-directory "~/")
188 ".gnus.registry.eld")
189 "File where the Gnus registry will be stored."
190 :group 'gnus-registry
193 (defcustom gnus-registry-max-entries nil
194 "Maximum number of entries in the registry, nil for unlimited."
195 :group 'gnus-registry
196 :type '(radio (const :format "Unlimited " nil)
197 (integer :format "Maximum number: %v")))
199 (defun gnus-registry-track-subject-p ()
200 (memq 'subject gnus-registry-track-extra))
202 (defun gnus-registry-track-sender-p ()
203 (memq 'sender gnus-registry-track-extra))
205 (defun gnus-registry-cache-read ()
206 "Read the registry cache file."
208 (let ((file gnus-registry-cache-file))
209 (when (file-exists-p file)
210 (gnus-message 5 "Reading %s..." file)
212 (gnus-message 5 "Reading %s...done" file))))
214 ;; FIXME: Get rid of duplicated code, cf. `gnus-save-newsrc-file' in
215 ;; `gnus-start.el'. --rsteib
216 (defun gnus-registry-cache-save ()
217 "Save the registry cache file."
219 (let ((file gnus-registry-cache-file))
221 (set-buffer (gnus-get-buffer-create " *Gnus-registry-cache*"))
222 (make-local-variable 'version-control)
223 (setq version-control gnus-backup-startup-file)
224 (setq buffer-file-name file)
225 (setq default-directory (file-name-directory buffer-file-name))
226 (buffer-disable-undo)
228 (gnus-message 5 "Saving %s..." file)
229 (if gnus-save-startup-file-via-temp-buffer
230 (let ((coding-system-for-write gnus-ding-file-coding-system)
231 (standard-output (current-buffer)))
232 (gnus-gnus-to-quick-newsrc-format
233 t "gnus registry startup file" 'gnus-registry-alist)
234 (gnus-registry-cache-whitespace file)
236 (let ((coding-system-for-write gnus-ding-file-coding-system)
237 (version-control gnus-backup-startup-file)
239 (working-dir (file-name-directory file))
242 ;; Generate the name of a non-existent file.
243 (while (progn (setq working-file
245 (if (and (eq system-type 'ms-dos)
246 (not (gnus-long-file-names)))
247 "%s#%d.tm#" ; MSDOS limits files to 8+3
248 (if (memq system-type '(vax-vms axp-vms))
251 working-dir (setq i (1+ i))))
252 (file-exists-p working-file)))
256 (gnus-with-output-to-file working-file
257 (gnus-gnus-to-quick-newsrc-format
258 t "gnus registry startup file" 'gnus-registry-alist))
260 ;; These bindings will mislead the current buffer
261 ;; into thinking that it is visiting the startup
263 (let ((buffer-backed-up nil)
264 (buffer-file-name startup-file)
265 (file-precious-flag t)
266 (setmodes (file-modes startup-file)))
267 ;; Backup the current version of the startup file.
270 ;; Replace the existing startup file with the temp file.
271 (rename-file working-file startup-file t)
272 (gnus-set-file-modes startup-file setmodes)))
274 (delete-file working-file)
277 (gnus-kill-buffer (current-buffer))
278 (gnus-message 5 "Saving %s...done" file))))
280 ;; Idea from Dan Christensen <jdc@chow.mat.jhu.edu>
281 ;; Save the gnus-registry file with extra line breaks.
282 (defun gnus-registry-cache-whitespace (filename)
283 (gnus-message 7 "Adding whitespace to %s" filename)
285 (goto-char (point-min))
286 (while (re-search-forward "^(\\|(\\\"" nil t)
287 (replace-match "\n\\&" t))
288 (goto-char (point-min))
289 (while (re-search-forward " $" nil t)
290 (replace-match "" t t))))
292 (defun gnus-registry-save (&optional force)
293 (when (or gnus-registry-dirty force)
294 (let ((caching gnus-registry-entry-caching))
295 ;; turn off entry caching, so mtime doesn't get recorded
296 (setq gnus-registry-entry-caching nil)
297 ;; remove entry caches
300 (if (hash-table-p value)
301 (remhash key gnus-registry-hashtb)))
302 gnus-registry-hashtb)
303 ;; remove empty entries
304 (when gnus-registry-clean-empty
305 (gnus-registry-clean-empty-function))
306 ;; now trim and clean text properties from the registry appropriately
307 (setq gnus-registry-alist
308 (gnus-registry-remove-alist-text-properties
310 (gnus-hashtable-to-alist
311 gnus-registry-hashtb))))
313 (gnus-registry-cache-save)
314 (setq gnus-registry-entry-caching caching)
315 (setq gnus-registry-dirty nil))))
317 (defun gnus-registry-clean-empty-function ()
318 "Remove all empty entries from the registry. Returns count thereof."
324 (dolist (group (gnus-registry-fetch-groups key))
325 (when (gnus-parameter-registry-ignore group)
328 "gnus-registry: deleted ignored group %s from key %s"
330 (gnus-registry-delete-group key group)))
332 (unless (gnus-registry-group-count key)
333 (gnus-registry-delete-id key))
336 (gnus-registry-fetch-group key)
337 ;; TODO: look for specific extra data here!
338 ;; in this example, we look for 'label
339 (gnus-registry-fetch-extra key 'label))
341 (gnus-registry-delete-id key))
343 (unless (stringp key)
346 "gnus-registry key %s was not a string, removing"
348 (gnus-registry-delete-id key))))
350 gnus-registry-hashtb)
353 (defun gnus-registry-read ()
354 (gnus-registry-cache-read)
355 (setq gnus-registry-hashtb (gnus-alist-to-hashtable gnus-registry-alist))
356 (setq gnus-registry-dirty nil))
358 (defun gnus-registry-remove-alist-text-properties (v)
359 "Remove text properties from all strings in alist."
361 (gnus-string-remove-all-properties v)
362 (if (and (listp v) (listp (cdr v)))
363 (mapcar 'gnus-registry-remove-alist-text-properties v)
364 (if (and (listp v) (stringp (cdr v)))
365 (cons (gnus-registry-remove-alist-text-properties (car v))
366 (gnus-registry-remove-alist-text-properties (cdr v)))
369 (defun gnus-registry-trim (alist)
370 "Trim alist to size, using gnus-registry-max-entries.
371 Any entries with extra data (marks, currently) are left alone."
372 (if (null gnus-registry-max-entries)
373 alist ; just return the alist
374 ;; else, when given max-entries, trim the alist
375 (let* ((timehash (make-hash-table
378 (precious (make-hash-table
381 (trim-length (- (length alist) gnus-registry-max-entries))
382 (trim-length (if (natnump trim-length) trim-length 0))
383 precious-list junk-list)
386 (let ((extra (gnus-registry-fetch-extra key)))
387 (dolist (item gnus-registry-extra-entries-precious)
389 (when (equal (nth 0 e) item)
390 (puthash key t precious)
392 (puthash key (gnus-registry-fetch-extra key 'mtime) timehash)))
393 gnus-registry-hashtb)
396 (let ((key (nth 0 item)))
397 (if (gethash key precious)
398 (push item precious-list)
399 (push item junk-list))))
404 (let ((t1 (or (cdr (gethash (car a) timehash))
406 (t2 (or (cdr (gethash (car b) timehash))
408 (time-less-p t1 t2))))
410 ;; we use the return value of this setq, which is the trimmed alist
411 (setq alist (append precious-list
412 (nthcdr trim-length junk-list))))))
414 (defun gnus-registry-action (action data-header from &optional to method)
415 (let* ((id (mail-header-id data-header))
416 (subject (gnus-string-remove-all-properties
417 (gnus-registry-simplify-subject
418 (mail-header-subject data-header))))
419 (sender (gnus-string-remove-all-properties
420 (mail-header-from data-header)))
421 (from (gnus-group-guess-full-name-from-command-method from))
422 (to (if to (gnus-group-guess-full-name-from-command-method to) nil))
423 (to-name (if to to "the Bit Bucket"))
424 (old-entry (gethash id gnus-registry-hashtb)))
425 (gnus-message 7 "Registry: article %s %s from %s to %s"
427 (if method "respooling" "going")
431 ;; All except copy will need a delete
432 (gnus-registry-delete-group id from)
434 (when (equal 'copy action)
435 (gnus-registry-add-group id from subject sender)) ; undo the delete
437 (gnus-registry-add-group id to subject sender)))
439 (defun gnus-registry-spool-action (id group &optional subject sender)
440 (let ((group (gnus-group-guess-full-name-from-command-method group)))
441 (when (and (stringp id) (string-match "\r$" id))
442 (setq id (substring id 0 -1)))
443 (gnus-message 7 "Registry: article %s spooled to %s"
446 (gnus-registry-add-group id group subject sender)))
448 ;; Function for nn{mail|imap}-split-fancy: look up all references in
449 ;; the cache and if a match is found, return that group.
450 (defun gnus-registry-split-fancy-with-parent ()
451 "Split this message into the same group as its parent. The parent
452 is obtained from the registry. This function can be used as an entry
453 in `nnmail-split-fancy' or `nnimap-split-fancy', for example like
454 this: (: gnus-registry-split-fancy-with-parent)
456 This function tracks ALL backends, unlike
457 `nnmail-split-fancy-with-parent' which tracks only nnmail
460 For a message to be split, it looks for the parent message in the
461 References or In-Reply-To header and then looks in the registry
462 to see which group that message was put in. This group is
463 returned, unless `gnus-registry-follow-group-p' return nil for
466 See the Info node `(gnus)Fancy Mail Splitting' for more details."
467 (let* ((refstr (or (message-fetch-field "references") "")) ; guaranteed
468 (reply-to (message-fetch-field "in-reply-to")) ; may be nil
469 ;; now, if reply-to is valid, append it to the References
471 (concat refstr " " reply-to)
473 ;; these may not be used, but the code is cleaner having them up here
474 (sender (gnus-string-remove-all-properties
475 (message-fetch-field "from")))
476 (subject (gnus-string-remove-all-properties
477 (gnus-registry-simplify-subject
478 (message-fetch-field "subject"))))
480 (nnmail-split-fancy-with-parent-ignore-groups
481 (if (listp nnmail-split-fancy-with-parent-ignore-groups)
482 nnmail-split-fancy-with-parent-ignore-groups
483 (list nnmail-split-fancy-with-parent-ignore-groups)))
484 (log-agent "gnus-registry-split-fancy-with-parent")
487 ;; this is a big if-else statement. it uses
488 ;; gnus-registry-post-process-groups to filter the results after
491 ;; the references string must be valid and parse to valid references
492 ((and refstr (gnus-extract-references refstr))
493 (dolist (reference (nreverse (gnus-extract-references refstr)))
496 "%s is looking for matches for reference %s from [%s]"
497 log-agent reference refstr)
498 (dolist (group (gnus-registry-fetch-groups reference))
499 (when (and group (gnus-registry-follow-group-p group))
502 "%s traced the reference %s from [%s] to group %s"
503 log-agent reference refstr group)
504 (push group found))))
505 ;; filter the found groups and return them
506 (setq found (gnus-registry-post-process-groups
507 "references" refstr found)))
509 ;; else: there were no matches, now try the extra tracking by sender
510 ((and (gnus-registry-track-sender-p)
514 (let ((this-sender (cdr
515 (gnus-registry-fetch-extra key 'sender)))
517 (when (and this-sender
518 (equal sender this-sender))
519 (setq found (append (gnus-registry-fetch-groups key) found))
522 ;; raise level of messaging if gnus-registry-track-extra
523 (if gnus-registry-track-extra 7 9)
524 "%s (extra tracking) traced sender %s to groups %s (keys %s)"
525 log-agent sender found matches))))
526 gnus-registry-hashtb)
527 ;; filter the found groups and return them
528 (setq found (gnus-registry-post-process-groups "sender" sender found)))
530 ;; else: there were no matches, now try the extra tracking by subject
531 ((and (gnus-registry-track-subject-p)
533 (< gnus-registry-minimum-subject-length (length subject)))
536 (let ((this-subject (cdr
537 (gnus-registry-fetch-extra key 'subject)))
539 (when (and this-subject
540 (equal subject this-subject))
541 (setq found (append (gnus-registry-fetch-groups key) found))
544 ;; raise level of messaging if gnus-registry-track-extra
545 (if gnus-registry-track-extra 7 9)
546 "%s (extra tracking) traced subject %s to groups %s (keys %s)"
547 log-agent subject found matches))))
548 gnus-registry-hashtb)
549 ;; filter the found groups and return them
550 (setq found (gnus-registry-post-process-groups
551 "subject" subject found))))))
553 (defun gnus-registry-post-process-groups (mode key groups)
554 "Modifies GROUPS found by MODE for KEY to determine which ones to follow.
556 MODE can be 'subject' or 'sender' for example. The KEY is the
557 value by which MODE was searched.
559 Transforms each group name to the equivalent short name.
561 Checks if the current Gnus method (from `gnus-command-method' or
562 from `gnus-newsgroup-name') is the same as the group's method.
563 This is not possible if gnus-registry-use-long-group-names is
564 false. Foreign methods are not supported so they are rejected.
566 Reduces the list to a single group, or complains if that's not
568 (let ((log-agent "gnus-registry-post-process-group")
570 (if gnus-registry-use-long-group-names
571 (dolist (group groups)
572 (let ((m1 (gnus-find-method-for-group group))
573 (m2 (or gnus-command-method
574 (gnus-find-method-for-group gnus-newsgroup-name)))
575 (short-name (gnus-group-short-name group)))
576 (if (gnus-methods-equal-p m1 m2)
578 ;; this is REALLY just for debugging
581 "%s stripped group %s to %s"
582 log-agent group short-name)
583 (unless (member short-name out)
584 (push short-name out)))
588 "%s ignored foreign group %s"
594 "%s: too many extra matches (%s) for %s %s. Returning none."
595 log-agent out mode key)
599 (defun gnus-registry-follow-group-p (group)
600 "Determines if a group name should be followed.
601 Consults `gnus-registry-unfollowed-groups' and
602 `nnmail-split-fancy-with-parent-ignore-groups'."
603 (not (or (gnus-registry-grep-in-list
605 gnus-registry-unfollowed-groups)
606 (gnus-registry-grep-in-list
608 nnmail-split-fancy-with-parent-ignore-groups))))
610 (defun gnus-registry-wash-for-keywords (&optional force)
612 (let ((id (gnus-registry-fetch-message-id-fast gnus-current-article))
614 (if (or (not (gnus-registry-fetch-extra id 'keywords))
617 (set-buffer gnus-article-buffer)
619 (save-window-excursion
621 (narrow-to-region (point) (point-max))
622 (with-syntax-table gnus-adaptive-word-syntax-table
623 (while (re-search-forward "\\b\\w+\\b" nil t)
624 (setq word (gnus-registry-remove-alist-text-properties
625 (downcase (buffer-substring
626 (match-beginning 0) (match-end 0)))))
627 (if (> (length word) 3)
628 (push word words))))))
629 (gnus-registry-store-extra-entry id 'keywords words)))))
631 (defun gnus-registry-find-keywords (keyword)
632 (interactive "skeyword: ")
636 (when (gnus-registry-grep-in-list
638 (cdr (gnus-registry-fetch-extra key 'keywords)))
639 (push key articles)))
640 gnus-registry-hashtb)
643 (defun gnus-registry-register-message-ids ()
644 "Register the Message-ID of every article in the group"
645 (unless (gnus-parameter-registry-ignore gnus-newsgroup-name)
646 (dolist (article gnus-newsgroup-articles)
647 (let ((id (gnus-registry-fetch-message-id-fast article)))
648 (unless (member gnus-newsgroup-name (gnus-registry-fetch-groups id))
649 (gnus-message 9 "Registry: Registering article %d with group %s"
650 article gnus-newsgroup-name)
651 (gnus-registry-add-group
654 (gnus-registry-fetch-simplified-message-subject-fast article)
655 (gnus-registry-fetch-sender-fast article)))))))
657 (defun gnus-registry-fetch-message-id-fast (article)
658 "Fetch the Message-ID quickly, using the internal gnus-data-list function"
659 (if (and (numberp article)
660 (assoc article (gnus-data-list nil)))
661 (mail-header-id (gnus-data-header (assoc article (gnus-data-list nil))))
664 (defun gnus-registry-simplify-subject (subject)
665 (if (stringp subject)
666 (gnus-simplify-subject subject)
669 (defun gnus-registry-fetch-simplified-message-subject-fast (article)
670 "Fetch the Subject quickly, using the internal gnus-data-list function"
671 (if (and (numberp article)
672 (assoc article (gnus-data-list nil)))
673 (gnus-string-remove-all-properties
674 (gnus-registry-simplify-subject
675 (mail-header-subject (gnus-data-header
676 (assoc article (gnus-data-list nil))))))
679 (defun gnus-registry-fetch-sender-fast (article)
680 "Fetch the Sender quickly, using the internal gnus-data-list function"
681 (if (and (numberp article)
682 (assoc article (gnus-data-list nil)))
683 (gnus-string-remove-all-properties
684 (mail-header-from (gnus-data-header
685 (assoc article (gnus-data-list nil)))))
688 ;;; this should be redone with catch/throw
689 (defun gnus-registry-grep-in-list (word list)
695 (string-match word x))
698 (defun gnus-registry-do-marks (type function)
699 "For each known mark, call FUNCTION for each cell of type TYPE.
701 FUNCTION should take two parameters, a mark symbol and the cell value."
702 (dolist (mark-info gnus-registry-marks)
703 (let ((mark (car-safe mark-info))
704 (data (cdr-safe mark-info)))
706 (let ((cell-type (car-safe cell))
707 (cell-data (cdr-safe cell)))
708 (when (equal type cell-type)
709 (funcall function mark cell-data)))))))
711 ;;; this is ugly code, but I don't know how to do it better
712 ;;; TODO: clear the gnus-registry-mark-map before running
713 (defun gnus-registry-install-shortcuts-and-menus ()
714 "Install the keyboard shortcuts and menus for the registry.
715 Uses `gnus-registry-marks' to find what shortcuts to install."
716 (gnus-registry-do-marks
719 (let ((function-format
720 (format "gnus-registry-%%s-article-%s-mark" mark)))
722 ;;; The following generates these functions:
723 ;;; (defun gnus-registry-set-article-Important-mark (&rest articles)
724 ;;; "Apply the Important mark to process-marked ARTICLES."
725 ;;; (interactive (gnus-summary-work-articles current-prefix-arg))
726 ;;; (gnus-registry-set-article-mark-internal 'Important articles nil t))
727 ;;; (defun gnus-registry-remove-article-Important-mark (&rest articles)
728 ;;; "Apply the Important mark to process-marked ARTICLES."
729 ;;; (interactive (gnus-summary-work-articles current-prefix-arg))
730 ;;; (gnus-registry-set-article-mark-internal 'Important articles t t))
732 (dolist (remove '(t nil))
733 (let* ((variant-name (if remove "remove" "set"))
734 (function-name (format function-format variant-name))
735 (shortcut (format "%c" data))
736 (shortcut (if remove (upcase shortcut) shortcut)))
737 (unintern function-name)
741 ,(intern function-name)
742 ;; parameter definition
746 "%s the %s mark over process-marked ARTICLES."
747 (upcase-initials variant-name)
749 ;; interactive definition
751 (gnus-summary-work-articles current-prefix-arg))
753 (gnus-registry-set-article-mark-internal
754 ;; all this just to get the mark, I must be doing it wrong
755 (intern ,(symbol-name mark))
756 articles ,remove t))))))))
757 ;; I don't know how to do this inside the loop above, because
758 ;; gnus-define-keys is a macro
759 (gnus-define-keys (gnus-registry-mark-map "M" gnus-summary-mark-map)
760 "i" gnus-registry-set-article-Important-mark
761 "I" gnus-registry-remove-article-Important-mark
762 "w" gnus-registry-set-article-Work-mark
763 "W" gnus-registry-remove-article-Work-mark
764 "l" gnus-registry-set-article-Later-mark
765 "L" gnus-registry-remove-article-Later-mark
766 "p" gnus-registry-set-article-Personal-mark
767 "P" gnus-registry-remove-article-Personal-mark
768 "t" gnus-registry-set-article-To-Do-mark
769 "T" gnus-registry-remove-article-To-Do-mark))
771 (defun gnus-registry-read-mark ()
772 "Read a mark name from the user with completion."
773 (let ((mark (gnus-completing-read-with-default
774 (symbol-name gnus-registry-default-mark)
776 (mapcar (lambda (x) ; completion list
777 (cons (symbol-name (car-safe x)) (car-safe x)))
778 gnus-registry-marks))))
782 (defun gnus-registry-set-article-mark (&rest articles)
783 "Apply a mark to process-marked ARTICLES."
784 (interactive (gnus-summary-work-articles current-prefix-arg))
785 (gnus-registry-set-article-mark-internal (gnus-registry-read-mark) articles nil t))
787 (defun gnus-registry-remove-article-mark (&rest articles)
788 "Remove a mark from process-marked ARTICLES."
789 (interactive (gnus-summary-work-articles current-prefix-arg))
790 (gnus-registry-set-article-mark-internal (gnus-registry-read-mark) articles t t))
792 (defun gnus-registry-set-article-mark-internal (mark articles &optional remove show-message)
793 "Apply a mark to a list of ARTICLES."
794 (let ((article-id-list
795 (mapcar 'gnus-registry-fetch-message-id-fast articles)))
796 (dolist (id article-id-list)
798 ;; all the marks for this article without the mark of
801 (delq mark (gnus-registry-fetch-extra-marks id)))
802 ;; the new marks we want to use
803 (new-marks (if remove
807 (gnus-message 1 "%s mark %s with message ID %s, resulting in %S"
808 (if remove "Removing" "Adding")
811 (apply 'gnus-registry-store-extra-marks ; set the extra marks
812 id ; for the message ID
815 (defun gnus-registry-get-article-marks (&rest articles)
816 "Get the Gnus registry marks for ARTICLES and show them if interactive.
817 Uses process/prefix conventions. For multiple articles,
818 only the last one's marks are returned."
819 (interactive (gnus-summary-work-articles 1))
821 (dolist (article articles)
823 (gnus-registry-fetch-message-id-fast article)))
824 (setq marks (gnus-registry-fetch-extra-marks article-id))))
825 (when (interactive-p)
826 (gnus-message 1 "Marks are %S" marks))
829 ;;; if this extends to more than 'marks, it should be improved to be more generic.
830 (defun gnus-registry-fetch-extra-marks (id)
831 "Get the marks of a message, based on the message ID.
832 Returns a list of symbol marks or nil."
833 (car-safe (cdr (gnus-registry-fetch-extra id 'marks))))
835 (defun gnus-registry-has-extra-mark (id mark)
836 "Checks if a message has `mark', based on the message ID `id'."
837 (memq mark (gnus-registry-fetch-extra-marks id)))
839 (defun gnus-registry-store-extra-marks (id &rest mark-list)
840 "Set the marks of a message, based on the message ID.
841 The `mark-list' can be nil, in which case no marks are left."
842 (gnus-registry-store-extra-entry id 'marks (list mark-list)))
844 (defun gnus-registry-delete-extra-marks (id &rest mark-delete-list)
845 "Delete the message marks in `mark-delete-list', based on the message ID."
846 (let ((marks (gnus-registry-fetch-extra-marks id)))
848 (dolist (mark mark-delete-list)
849 (setq marks (delq mark marks))))
850 (gnus-registry-store-extra-marks id (car marks))))
852 (defun gnus-registry-delete-all-extra-marks (id)
853 "Delete all the marks for a message ID."
854 (gnus-registry-store-extra-marks id nil))
856 (defun gnus-registry-fetch-extra (id &optional entry)
857 "Get the extra data of a message, based on the message ID.
858 Returns the first place where the trail finds a nonstring."
859 (let ((entry-cache (gethash entry gnus-registry-hashtb)))
861 (hash-table-p entry-cache)
862 (gethash id entry-cache))
863 (gethash id entry-cache)
864 ;; else, if there is no caching possible...
865 (let ((trail (gethash id gnus-registry-hashtb)))
867 (dolist (crumb trail)
868 (unless (stringp crumb)
869 (return (gnus-registry-fetch-extra-entry crumb entry id)))))))))
871 (defun gnus-registry-fetch-extra-entry (alist &optional entry id)
872 "Get the extra data of a message, or a specific entry in it.
873 Update the entry cache if needed."
875 (let ((entry-cache (gethash entry gnus-registry-hashtb))
877 (when gnus-registry-entry-caching
878 ;; create the hash table
879 (unless (hash-table-p entry-cache)
880 (setq entry-cache (make-hash-table
883 (puthash entry entry-cache gnus-registry-hashtb))
885 ;; get the entree from the hash table or from the alist
886 (setq entree (gethash id entry-cache)))
889 (setq entree (assq entry alist))
890 (when gnus-registry-entry-caching
891 (puthash id entree entry-cache)))
895 (defun gnus-registry-store-extra (id extra)
896 "Store the extra data of a message, based on the message ID.
897 The message must have at least one group name."
898 (when (gnus-registry-group-count id)
899 ;; we now know the trail has at least 1 group name, so it's not empty
900 (let ((trail (gethash id gnus-registry-hashtb))
901 (old-extra (gnus-registry-fetch-extra id))
903 (dolist (crumb trail)
904 (unless (stringp crumb)
905 (dolist (entry crumb)
906 (setq entry-cache (gethash (car entry) gnus-registry-hashtb))
908 (remhash id entry-cache))))
909 (puthash id (cons extra (delete old-extra trail))
910 gnus-registry-hashtb)
911 (setq gnus-registry-dirty t)))))
913 (defun gnus-registry-delete-extra-entry (id key)
914 "Delete a specific entry in the extras field of the registry entry for id."
915 (gnus-registry-store-extra-entry id key nil))
917 (defun gnus-registry-store-extra-entry (id key value)
918 "Put a specific entry in the extras field of the registry entry for id."
919 (let* ((extra (gnus-registry-fetch-extra id))
920 ;; all the entries except the one for `key'
921 (the-rest (gnus-assq-delete-all key (gnus-registry-fetch-extra id)))
923 (gnus-registry-remove-alist-text-properties
924 (cons (cons key value)
927 (gnus-registry-store-extra id alist)))
929 (defun gnus-registry-fetch-group (id)
930 "Get the group of a message, based on the message ID.
931 Returns the first place where the trail finds a group name."
932 (when (gnus-registry-group-count id)
933 ;; we now know the trail has at least 1 group name
934 (let ((trail (gethash id gnus-registry-hashtb)))
935 (dolist (crumb trail)
936 (when (stringp crumb)
937 (return (if gnus-registry-use-long-group-names
939 (gnus-group-short-name crumb))))))))
941 (defun gnus-registry-fetch-groups (id)
942 "Get the groups of a message, based on the message ID."
943 (let ((trail (gethash id gnus-registry-hashtb))
945 (dolist (crumb trail)
946 (when (stringp crumb)
947 ;; push the group name into the list
951 (if (or (not (stringp crumb)) gnus-registry-use-long-group-names)
953 (gnus-group-short-name crumb))
955 ;; return the list of groups
958 (defun gnus-registry-group-count (id)
959 "Get the number of groups of a message, based on the message ID."
960 (let ((trail (gethash id gnus-registry-hashtb)))
961 (if (and trail (listp trail))
962 (apply '+ (mapcar (lambda (x) (if (stringp x) 1 0)) trail))
965 (defun gnus-registry-delete-group (id group)
966 "Delete a group for a message, based on the message ID."
968 (let ((trail (gethash id gnus-registry-hashtb))
969 (short-group (gnus-group-short-name group)))
970 (puthash id (if trail
971 (delete short-group (delete group trail))
973 gnus-registry-hashtb))
974 ;; now, clear the entry if there are no more groups
975 (when gnus-registry-trim-articles-without-groups
976 (unless (gnus-registry-group-count id)
977 (gnus-registry-delete-id id)))
978 ;; is this ID still in the registry?
979 (when (gethash id gnus-registry-hashtb)
980 (gnus-registry-store-extra-entry id 'mtime (current-time)))))
982 (defun gnus-registry-delete-id (id)
983 "Delete a message ID from the registry."
985 (remhash id gnus-registry-hashtb)
988 (when (hash-table-p value)
990 gnus-registry-hashtb)))
992 (defun gnus-registry-add-group (id group &optional subject sender)
993 "Add a group for a message, based on the message ID."
996 (not (string-match "totally-fudged-out-message-id" id)))
997 (let ((full-group group)
998 (group (if gnus-registry-use-long-group-names
1000 (gnus-group-short-name group))))
1001 (gnus-registry-delete-group id group)
1003 (unless gnus-registry-use-long-group-names ;; unnecessary in this case
1004 (gnus-registry-delete-group id full-group))
1006 (let ((trail (gethash id gnus-registry-hashtb)))
1007 (puthash id (if trail
1010 gnus-registry-hashtb)
1012 (when (and (gnus-registry-track-subject-p)
1014 (gnus-registry-store-extra-entry
1017 (gnus-registry-simplify-subject subject)))
1018 (when (and (gnus-registry-track-sender-p)
1020 (gnus-registry-store-extra-entry
1025 (gnus-registry-store-extra-entry id 'mtime (current-time)))))))
1027 (defun gnus-registry-clear ()
1028 "Clear the Gnus registry."
1030 (setq gnus-registry-alist nil)
1031 (setq gnus-registry-hashtb (gnus-alist-to-hashtable gnus-registry-alist))
1032 (setq gnus-registry-dirty t))
1035 (defun gnus-registry-initialize ()
1037 (setq gnus-registry-install t)
1038 (gnus-registry-install-hooks)
1039 (gnus-registry-install-shortcuts-and-menus)
1040 (gnus-registry-read))
1043 (defun gnus-registry-install-hooks ()
1044 "Install the registry hooks."
1046 (add-hook 'gnus-summary-article-move-hook 'gnus-registry-action)
1047 (add-hook 'gnus-summary-article-delete-hook 'gnus-registry-action)
1048 (add-hook 'gnus-summary-article-expire-hook 'gnus-registry-action)
1049 (add-hook 'nnmail-spool-hook 'gnus-registry-spool-action)
1051 (add-hook 'gnus-save-newsrc-hook 'gnus-registry-save)
1052 (add-hook 'gnus-read-newsrc-el-hook 'gnus-registry-read)
1054 (add-hook 'gnus-summary-prepare-hook 'gnus-registry-register-message-ids))
1056 (defun gnus-registry-unload-hook ()
1057 "Uninstall the registry hooks."
1059 (remove-hook 'gnus-summary-article-move-hook 'gnus-registry-action)
1060 (remove-hook 'gnus-summary-article-delete-hook 'gnus-registry-action)
1061 (remove-hook 'gnus-summary-article-expire-hook 'gnus-registry-action)
1062 (remove-hook 'nnmail-spool-hook 'gnus-registry-spool-action)
1064 (remove-hook 'gnus-save-newsrc-hook 'gnus-registry-save)
1065 (remove-hook 'gnus-read-newsrc-el-hook 'gnus-registry-read)
1067 (remove-hook 'gnus-summary-prepare-hook 'gnus-registry-register-message-ids))
1069 (add-hook 'gnus-registry-unload-hook 'gnus-registry-unload-hook)
1071 (when gnus-registry-install
1072 (gnus-registry-install-hooks)
1073 (gnus-registry-read))
1075 ;; TODO: a lot of things
1077 (provide 'gnus-registry)
1079 ;;; arch-tag: 5cba0a32-718a-4a97-8c91-0a15af21da94
1080 ;;; gnus-registry.el ends here