1;;; gnus-group.el --- group mode commands for Gnus
2
3;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4;;   2005, 2006, 2007 Free Software Foundation, Inc.
5
6;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
7;; Keywords: news
8
9;; This file is part of GNU Emacs.
10
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 2, or (at your option)
14;; any later version.
15
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.
20
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.
25
26;;; Commentary:
27
28;;; Code:
29
30(eval-when-compile
31  (require 'cl)
32  (defvar tool-bar-mode))
33
34(require 'gnus)
35(require 'gnus-start)
36(require 'nnmail)
37(require 'gnus-spec)
38(require 'gnus-int)
39(require 'gnus-range)
40(require 'gnus-win)
41(require 'gnus-undo)
42(require 'gmm-utils)
43(require 'time-date)
44(require 'gnus-ems)
45
46(eval-when-compile
47  (require 'mm-url)
48  (let ((features (cons 'gnus-group features)))
49    (require 'gnus-sum))
50  (defvar gnus-cache-active-hashtb))
51
52(defcustom gnus-group-archive-directory
53  "/ftp@ftp.hpc.uh.edu:/pub/emacs/ding-list/"
54  "*The address of the (ding) archives."
55  :group 'gnus-group-foreign
56  :type 'directory)
57
58(defcustom gnus-group-recent-archive-directory
59  "/ftp@ftp.hpc.uh.edu:/pub/emacs/ding-list-recent/"
60  "*The address of the most recent (ding) articles."
61  :group 'gnus-group-foreign
62  :type 'directory)
63
64(defcustom gnus-no-groups-message "No gnus is bad news"
65  "*Message displayed by Gnus when no groups are available."
66  :group 'gnus-start
67  :type 'string)
68
69(defcustom gnus-keep-same-level nil
70  "*Non-nil means that the next newsgroup after the current will be on the same level.
71When you type, for instance, `n' after reading the last article in the
72current newsgroup, you will go to the next newsgroup.  If this variable
73is nil, the next newsgroup will be the next from the group
74buffer.
75If this variable is non-nil, Gnus will either put you in the
76next newsgroup with the same level, or, if no such newsgroup is
77available, the next newsgroup with the lowest possible level higher
78than the current level.
79If this variable is `best', Gnus will make the next newsgroup the one
80with the best level."
81  :group 'gnus-group-levels
82  :type '(choice (const nil)
83		 (const best)
84		 (sexp :tag "other" t)))
85
86(defcustom gnus-group-goto-unread t
87  "*If non-nil, movement commands will go to the next unread and subscribed group."
88  :link '(custom-manual "(gnus)Group Maneuvering")
89  :group 'gnus-group-various
90  :type 'boolean)
91
92(defcustom gnus-goto-next-group-when-activating t
93  "*If non-nil, the \\<gnus-group-mode-map>\\[gnus-group-get-new-news-this-group] command will advance point to the next group."
94  :link '(custom-manual "(gnus)Scanning New Messages")
95  :group 'gnus-group-various
96  :type 'boolean)
97
98(defcustom gnus-permanently-visible-groups nil
99  "*Regexp to match groups that should always be listed in the group buffer.
100This means that they will still be listed even when there are no
101unread articles in the groups.
102
103If nil, no groups are permanently visible."
104  :group 'gnus-group-listing
105  :type '(choice regexp (const nil)))
106
107(defcustom gnus-list-groups-with-ticked-articles t
108  "*If non-nil, list groups that have only ticked articles.
109If nil, only list groups that have unread articles."
110  :group 'gnus-group-listing
111  :type 'boolean)
112
113(defcustom gnus-group-default-list-level gnus-level-subscribed
114  "*Default listing level.
115Ignored if `gnus-group-use-permanent-levels' is non-nil."
116  :group 'gnus-group-listing
117  :type 'integer)
118
119(defcustom gnus-group-list-inactive-groups t
120  "*If non-nil, inactive groups will be listed."
121  :group 'gnus-group-listing
122  :group 'gnus-group-levels
123  :type 'boolean)
124
125(defcustom gnus-group-sort-function 'gnus-group-sort-by-alphabet
126  "*Function used for sorting the group buffer.
127This function will be called with group info entries as the arguments
128for the groups to be sorted.  Pre-made functions include
129`gnus-group-sort-by-alphabet', `gnus-group-sort-by-real-name',
130`gnus-group-sort-by-unread', `gnus-group-sort-by-level',
131`gnus-group-sort-by-score', `gnus-group-sort-by-method',
132`gnus-group-sort-by-server', and `gnus-group-sort-by-rank'.
133
134This variable can also be a list of sorting functions.  In that case,
135the most significant sort function should be the last function in the
136list."
137  :group 'gnus-group-listing
138  :link '(custom-manual "(gnus)Sorting Groups")
139  :type '(repeat :value-to-internal (lambda (widget value)
140				      (if (listp value) value (list value)))
141		 :match (lambda (widget value)
142			  (or (symbolp value)
143			      (widget-editable-list-match widget value)))
144		 (choice (function-item gnus-group-sort-by-alphabet)
145			 (function-item gnus-group-sort-by-real-name)
146			 (function-item gnus-group-sort-by-unread)
147			 (function-item gnus-group-sort-by-level)
148			 (function-item gnus-group-sort-by-score)
149			 (function-item gnus-group-sort-by-method)
150			 (function-item gnus-group-sort-by-server)
151			 (function-item gnus-group-sort-by-rank)
152			 (function :tag "other" nil))))
153
154(defcustom gnus-group-line-format "%M\%S\%p\%P\%5y:%B%(%g%)%l %O\n"
155  "*Format of group lines.
156It works along the same lines as a normal formatting string,
157with some simple extensions.
158
159%M    Only marked articles (character, \"*\" or \" \")
160%S    Whether the group is subscribed (character, \"U\", \"K\", \"Z\" or \" \")
161%L    Level of subscribedness (integer)
162%N    Number of unread articles (integer)
163%I    Number of dormant articles (integer)
164%i    Number of ticked and dormant (integer)
165%T    Number of ticked articles (integer)
166%R    Number of read articles (integer)
167%U    Number of unseen articles (integer)
168%t    Estimated total number of articles (integer)
169%y    Number of unread, unticked articles (integer)
170%G    Group name (string)
171%g    Qualified group name (string)
172%c    Short (collapsed) group name.  See `gnus-group-uncollapsed-levels'.
173%C    Group comment (string)
174%D    Group description (string)
175%s    Select method (string)
176%o    Moderated group (char, \"m\")
177%p    Process mark (char)
178%B    Whether a summary buffer for the group is open (char, \"*\")
179%O    Moderated group (string, \"(m)\" or \"\")
180%P    Topic indentation (string)
181%m    Whether there is new(ish) mail in the group (char, \"%\")
182%l    Whether there are GroupLens predictions for this group (string)
183%n    Select from where (string)
184%z    A string that look like `<%s:%n>' if a foreign select method is used
185%d    The date the group was last entered.
186%E    Icon as defined by `gnus-group-icon-list'.
187%u    User defined specifier.  The next character in the format string should
188      be a letter.  Gnus will call the function gnus-user-format-function-X,
189      where X is the letter following %u.  The function will be passed a
190      single dummy parameter as argument.  The function should return a
191      string, which will be inserted into the buffer just like information
192      from any other group specifier.
193
194Note that this format specification is not always respected.  For
195reasons of efficiency, when listing killed groups, this specification
196is ignored altogether.  If the spec is changed considerably, your
197output may end up looking strange when listing both alive and killed
198groups.
199
200If you use %o or %O, reading the active file will be slower and quite
201a bit of extra memory will be used.  %D will also worsen performance.
202Also note that if you change the format specification to include any
203of these specs, you must probably re-start Gnus to see them go into
204effect.
205
206General format specifiers can also be used.
207See Info node `(gnus)Formatting Variables'."
208  :link '(custom-manual "(gnus)Formatting Variables")
209  :group 'gnus-group-visual
210  :type 'string)
211
212(defcustom gnus-group-mode-line-format "Gnus: %%b {%M\%:%S}"
213  "*The format specification for the group mode line.
214It works along the same lines as a normal formatting string,
215with some simple extensions:
216
217%S   The native news server.
218%M   The native select method.
219%:   \":\" if %S isn't \"\"."
220  :group 'gnus-group-visual
221  :type 'string)
222
223;; Extracted from gnus-xmas-redefine in order to preserve user settings
224(when (featurep 'xemacs)
225  (add-hook 'gnus-group-mode-hook 'gnus-xmas-group-menu-add)
226  (add-hook 'gnus-group-mode-hook 'gnus-xmas-setup-group-toolbar))
227
228(defcustom gnus-group-menu-hook nil
229  "Hook run after the creation of the group mode menu."
230  :group 'gnus-group-various
231  :type 'hook)
232
233(defcustom gnus-group-catchup-group-hook nil
234  "Hook run when catching up a group from the group buffer."
235  :group 'gnus-group-various
236  :link '(custom-manual "(gnus)Group Data")
237  :type 'hook)
238
239(defcustom gnus-group-update-group-hook nil
240  "Hook called when updating group lines."
241  :group 'gnus-group-visual
242  :type 'hook)
243
244(defcustom gnus-group-prepare-function 'gnus-group-prepare-flat
245  "*A function that is called to generate the group buffer.
246The function is called with three arguments: The first is a number;
247all group with a level less or equal to that number should be listed,
248if the second is non-nil, empty groups should also be displayed.  If
249the third is non-nil, it is a number.  No groups with a level lower
250than this number should be displayed.
251
252The only current function implemented is `gnus-group-prepare-flat'."
253  :group 'gnus-group-listing
254  :type 'function)
255
256(defcustom gnus-group-prepare-hook nil
257  "Hook called after the group buffer has been generated.
258If you want to modify the group buffer, you can use this hook."
259  :group 'gnus-group-listing
260  :type 'hook)
261
262(defcustom gnus-suspend-gnus-hook nil
263  "Hook called when suspending (not exiting) Gnus."
264  :group 'gnus-exit
265  :type 'hook)
266
267(defcustom gnus-exit-gnus-hook nil
268  "Hook called when exiting Gnus."
269  :group 'gnus-exit
270  :type 'hook)
271
272(defcustom gnus-after-exiting-gnus-hook nil
273  "Hook called after exiting Gnus."
274  :group 'gnus-exit
275  :type 'hook)
276
277(defcustom gnus-group-update-hook '(gnus-group-highlight-line)
278  "Hook called when a group line is changed.
279The hook will not be called if `gnus-visual' is nil.
280
281The default function `gnus-group-highlight-line' will
282highlight the line according to the `gnus-group-highlight'
283variable."
284  :group 'gnus-group-visual
285  :type 'hook)
286
287(defcustom gnus-useful-groups
288  '(("(ding) mailing list mirrored at gmane.org"
289     "gmane.emacs.gnus.general"
290     (nntp "Gmane"
291	   (nntp-address "news.gmane.org")))
292    ("Gnus bug archive"
293     "gnus.gnus-bug"
294     (nntp "news.gnus.org"
295	   (nntp-address "news.gnus.org")))
296    ("Local Gnus help group"
297     "gnus-help"
298     (nndoc "gnus-help"
299	    (nndoc-article-type mbox)
300	    (eval `(nndoc-address
301		    ,(let ((file (nnheader-find-etc-directory
302				  "gnus-tut.txt" t)))
303		       (unless file
304			 (error "Couldn't find doc group"))
305		       file))))))
306  "*Alist of useful group-server pairs."
307  :group 'gnus-group-listing
308  :type '(repeat (list (string :tag "Description")
309		       (string :tag "Name")
310		       (sexp :tag "Method"))))
311
312(defcustom gnus-group-highlight
313  '(;; Mail.
314    ((and mailp (= unread 0) (eq level 1)) .
315     gnus-group-mail-1-empty)
316    ((and mailp (eq level 1)) .
317     gnus-group-mail-1)
318    ((and mailp (= unread 0) (eq level 2)) .
319     gnus-group-mail-2-empty)
320    ((and mailp (eq level 2)) .
321     gnus-group-mail-2)
322    ((and mailp (= unread 0) (eq level 3)) .
323     gnus-group-mail-3-empty)
324    ((and mailp (eq level 3)) .
325     gnus-group-mail-3)
326    ((and mailp (= unread 0)) .
327     gnus-group-mail-low-empty)
328    ((and mailp) .
329     gnus-group-mail-low)
330    ;; News.
331    ((and (= unread 0) (eq level 1)) .
332     gnus-group-news-1-empty)
333    ((and (eq level 1)) .
334     gnus-group-news-1)
335    ((and (= unread 0) (eq level 2)) .
336     gnus-group-news-2-empty)
337    ((and (eq level 2)) .
338     gnus-group-news-2)
339    ((and (= unread 0) (eq level 3)) .
340     gnus-group-news-3-empty)
341    ((and (eq level 3)) .
342     gnus-group-news-3)
343    ((and (= unread 0) (eq level 4)) .
344     gnus-group-news-4-empty)
345    ((and (eq level 4)) .
346     gnus-group-news-4)
347    ((and (= unread 0) (eq level 5)) .
348     gnus-group-news-5-empty)
349    ((and (eq level 5)) .
350     gnus-group-news-5)
351    ((and (= unread 0) (eq level 6)) .
352     gnus-group-news-6-empty)
353    ((and (eq level 6)) .
354     gnus-group-news-6)
355    ((and (= unread 0)) .
356     gnus-group-news-low-empty)
357    (t .
358     gnus-group-news-low))
359  "*Controls the highlighting of group buffer lines.
360
361Below is a list of `Form'/`Face' pairs.  When deciding how a a
362particular group line should be displayed, each form is
363evaluated.  The content of the face field after the first true form is
364used.  You can change how those group lines are displayed by
365editing the face field.
366
367It is also possible to change and add form fields, but currently that
368requires an understanding of Lisp expressions.  Hopefully this will
369change in a future release.  For now, you can use the following
370variables in the Lisp expression:
371
372group: The name of the group.
373unread: The number of unread articles in the group.
374method: The select method used.
375mailp: Whether it's a mail group or not.
376level: The level of the group.
377score: The score of the group.
378ticked: The number of ticked articles."
379  :group 'gnus-group-visual
380  :type '(repeat (cons (sexp :tag "Form") face)))
381
382(defcustom gnus-new-mail-mark ?%
383  "Mark used for groups with new mail."
384  :group 'gnus-group-visual
385  :type 'character)
386
387(defgroup gnus-group-icons nil
388  "Add Icons to your group buffer."
389  :group 'gnus-group-visual)
390
391(defcustom gnus-group-icon-list
392  nil
393  "*Controls the insertion of icons into group buffer lines.
394
395Below is a list of `Form'/`File' pairs.  When deciding how a
396particular group line should be displayed, each form is evaluated.
397The icon from the file field after the first true form is used.  You
398can change how those group lines are displayed by editing the file
399field.  The File will either be found in the
400`gnus-group-glyph-directory' or by designating absolute name of the
401file.
402
403It is also possible to change and add form fields, but currently that
404requires an understanding of Lisp expressions.  Hopefully this will
405change in a future release.  For now, you can use the following
406variables in the Lisp expression:
407
408group: The name of the group.
409unread: The number of unread articles in the group.
410method: The select method used.
411mailp: Whether it's a mail group or not.
412newsp: Whether it's a news group or not
413level: The level of the group.
414score: The score of the group.
415ticked: The number of ticked articles."
416  :group 'gnus-group-icons
417  :type '(repeat (cons (sexp :tag "Form") file)))
418
419(defcustom gnus-group-name-charset-method-alist nil
420  "Alist of method and the charset for group names.
421
422For example:
423    (((nntp \"news.com.cn\") . cn-gb-2312))"
424  :version "21.1"
425  :group 'gnus-charset
426  :type '(repeat (cons (sexp :tag "Method") (symbol :tag "Charset"))))
427
428(defcustom gnus-group-name-charset-group-alist
429  (if (or (and (fboundp 'find-coding-system) (find-coding-system 'utf-8))
430	  (mm-coding-system-p 'utf-8))
431      '((".*" . utf-8))
432    nil)
433  "Alist of group regexp and the charset for group names.
434
435For example:
436    ((\"\\.com\\.cn:\" . cn-gb-2312))"
437  :group 'gnus-charset
438  :type '(repeat (cons (regexp :tag "Group") (symbol :tag "Charset"))))
439
440(defcustom gnus-group-jump-to-group-prompt nil
441  "Default prompt for `gnus-group-jump-to-group'.
442If non-nil, the value should be a string, e.g. \"nnml:\",
443in which case `gnus-group-jump-to-group' offers \"Group: nnml:\"
444in the minibuffer prompt."
445  :version "22.1"
446  :group 'gnus-group-various
447  :type '(choice (string :tag "Prompt string")
448		 (const :tag "Empty" nil)))
449
450(defvar gnus-group-listing-limit 1000
451  "*A limit of the number of groups when listing.
452If the number of groups is larger than the limit, list them in a
453simple manner.")
454
455;;; Internal variables
456
457(defvar gnus-group-is-exiting-p nil)
458(defvar gnus-group-is-exiting-without-update-p nil)
459(defvar gnus-group-sort-alist-function 'gnus-group-sort-flat
460  "Function for sorting the group buffer.")
461
462(defvar gnus-group-sort-selected-function 'gnus-group-sort-selected-flat
463  "Function for sorting the selected groups in the group buffer.")
464
465(defvar gnus-group-indentation-function nil)
466(defvar gnus-goto-missing-group-function nil)
467(defvar gnus-group-update-group-function nil)
468(defvar gnus-group-goto-next-group-function nil
469  "Function to override finding the next group after listing groups.")
470
471(defvar gnus-group-edit-buffer nil)
472
473(defvar gnus-group-line-format-alist
474  `((?M gnus-tmp-marked-mark ?c)
475    (?S gnus-tmp-subscribed ?c)
476    (?L gnus-tmp-level ?d)
477    (?N (cond ((eq number t) "*" )
478	      ((numberp number)
479	       (int-to-string
480		(+ number
481		   (gnus-range-length (cdr (assq 'dormant gnus-tmp-marked)))
482		   (gnus-range-length (cdr (assq 'tick gnus-tmp-marked))))))
483	      (t number)) ?s)
484    (?R gnus-tmp-number-of-read ?s)
485    (?U (gnus-number-of-unseen-articles-in-group gnus-tmp-group) ?d)
486    (?t gnus-tmp-number-total ?d)
487    (?y gnus-tmp-number-of-unread ?s)
488    (?I (gnus-range-length (cdr (assq 'dormant gnus-tmp-marked))) ?d)
489    (?T (gnus-range-length (cdr (assq 'tick gnus-tmp-marked))) ?d)
490    (?i (+ (gnus-range-length (cdr (assq 'dormant gnus-tmp-marked)))
491	   (gnus-range-length (cdr (assq 'tick gnus-tmp-marked)))) ?d)
492    (?g (if (boundp 'gnus-tmp-decoded-group)
493	    gnus-tmp-decoded-group
494	  gnus-tmp-group)
495	?s)
496    (?G gnus-tmp-qualified-group ?s)
497    (?c (gnus-short-group-name (if (boundp 'gnus-tmp-decoded-group)
498				   gnus-tmp-decoded-group
499				 gnus-tmp-group))
500	?s)
501    (?C gnus-tmp-comment ?s)
502    (?D gnus-tmp-newsgroup-description ?s)
503    (?o gnus-tmp-moderated ?c)
504    (?O gnus-tmp-moderated-string ?s)
505    (?p gnus-tmp-process-marked ?c)
506    (?s gnus-tmp-news-server ?s)
507    (?n ,(if (featurep 'xemacs)
508	     '(symbol-name gnus-tmp-news-method)
509	   'gnus-tmp-news-method)
510	?s)
511    (?P gnus-group-indentation ?s)
512    (?E gnus-tmp-group-icon ?s)
513    (?B gnus-tmp-summary-live ?c)
514    (?l gnus-tmp-grouplens ?s)
515    (?z gnus-tmp-news-method-string ?s)
516    (?m (gnus-group-new-mail gnus-tmp-group) ?c)
517    (?d (gnus-group-timestamp-string gnus-tmp-group) ?s)
518    (?u gnus-tmp-user-defined ?s)))
519
520(defvar gnus-group-mode-line-format-alist
521  `((?S gnus-tmp-news-server ?s)
522    (?M gnus-tmp-news-method ?s)
523    (?u gnus-tmp-user-defined ?s)
524    (?: gnus-tmp-colon ?s)))
525
526(defvar gnus-topic-topology nil
527  "The complete topic hierarchy.")
528
529(defvar gnus-topic-alist nil
530  "The complete topic-group alist.")
531
532(defvar gnus-group-marked nil)
533
534(defvar gnus-group-list-mode nil)
535
536
537(defvar gnus-group-icon-cache nil)
538
539(defvar gnus-group-listed-groups nil)
540(defvar gnus-group-list-option nil)
541
542;;;
543;;; Gnus group mode
544;;;
545
546(put 'gnus-group-mode 'mode-class 'special)
547
548(gnus-define-keys gnus-group-mode-map
549  " " gnus-group-read-group
550  "=" gnus-group-select-group
551  "\r" gnus-group-select-group
552  "\M-\r" gnus-group-quick-select-group
553  "\M- " gnus-group-visible-select-group
554  [(meta control return)] gnus-group-select-group-ephemerally
555  "j" gnus-group-jump-to-group
556  "n" gnus-group-next-unread-group
557  "p" gnus-group-prev-unread-group
558  "\177" gnus-group-prev-unread-group
559  [delete] gnus-group-prev-unread-group
560  [backspace] gnus-group-prev-unread-group
561  "N" gnus-group-next-group
562  "P" gnus-group-prev-group
563  "\M-n" gnus-group-next-unread-group-same-level
564  "\M-p" gnus-group-prev-unread-group-same-level
565  "," gnus-group-best-unread-group
566  "." gnus-group-first-unread-group
567  "u" gnus-group-unsubscribe-current-group
568  "U" gnus-group-unsubscribe-group
569  "c" gnus-group-catchup-current
570  "C" gnus-group-catchup-current-all
571  "\M-c" gnus-group-clear-data
572  "l" gnus-group-list-groups
573  "L" gnus-group-list-all-groups
574  "m" gnus-group-mail
575  "i" gnus-group-news
576  "g" gnus-group-get-new-news
577  "\M-g" gnus-group-get-new-news-this-group
578  "R" gnus-group-restart
579  "r" gnus-group-read-init-file
580  "B" gnus-group-browse-foreign-server
581  "b" gnus-group-check-bogus-groups
582  "F" gnus-group-find-new-groups
583  "\C-c\C-d" gnus-group-describe-group
584  "\M-d" gnus-group-describe-all-groups
585  "\C-c\C-a" gnus-group-apropos
586  "\C-c\M-\C-a" gnus-group-description-apropos
587  "a" gnus-group-post-news
588  "\ek" gnus-group-edit-local-kill
589  "\eK" gnus-group-edit-global-kill
590  "\C-k" gnus-group-kill-group
591  "\C-y" gnus-group-yank-group
592  "\C-w" gnus-group-kill-region
593  "\C-x\C-t" gnus-group-transpose-groups
594  "\C-c\C-l" gnus-group-list-killed
595  "\C-c\C-x" gnus-group-expire-articles
596  "\C-c\M-\C-x" gnus-group-expire-all-groups
597  "V" gnus-version
598  "s" gnus-group-save-newsrc
599  "z" gnus-group-suspend
600  "q" gnus-group-exit
601  "Q" gnus-group-quit
602  "?" gnus-group-describe-briefly
603  "\C-c\C-i" gnus-info-find-node
604  "\M-e" gnus-group-edit-group-method
605  "^" gnus-group-enter-server-mode
606  gnus-mouse-2 gnus-mouse-pick-group
607  [follow-link] mouse-face
608  "<" beginning-of-buffer
609  ">" end-of-buffer
610  "\C-c\C-b" gnus-bug
611  "\C-c\C-s" gnus-group-sort-groups
612  "t" gnus-topic-mode
613  "\C-c\M-g" gnus-activate-all-groups
614  "\M-&" gnus-group-universal-argument
615  "#" gnus-group-mark-group
616  "\M-#" gnus-group-unmark-group)
617
618(gnus-define-keys (gnus-group-mark-map "M" gnus-group-mode-map)
619  "m" gnus-group-mark-group
620  "u" gnus-group-unmark-group
621  "w" gnus-group-mark-region
622  "b" gnus-group-mark-buffer
623  "r" gnus-group-mark-regexp
624  "U" gnus-group-unmark-all-groups)
625
626(gnus-define-keys (gnus-group-sieve-map "D" gnus-group-mode-map)
627  "u" gnus-sieve-update
628  "g" gnus-sieve-generate)
629
630(gnus-define-keys (gnus-group-group-map "G" gnus-group-mode-map)
631  "d" gnus-group-make-directory-group
632  "h" gnus-group-make-help-group
633  "u" gnus-group-make-useful-group
634  "a" gnus-group-make-archive-group
635  "k" gnus-group-make-kiboze-group
636  "l" gnus-group-nnimap-edit-acl
637  "m" gnus-group-make-group
638  "E" gnus-group-edit-group
639  "e" gnus-group-edit-group-method
640  "p" gnus-group-edit-group-parameters
641  "v" gnus-group-add-to-virtual
642  "V" gnus-group-make-empty-virtual
643  "D" gnus-group-enter-directory
644  "f" gnus-group-make-doc-group
645  "w" gnus-group-make-web-group
646  "M" gnus-group-read-ephemeral-group
647  "r" gnus-group-rename-group
648  "R" gnus-group-make-rss-group
649  "c" gnus-group-customize
650  "x" gnus-group-nnimap-expunge
651  "\177" gnus-group-delete-group
652  [delete] gnus-group-delete-group)
653
654(gnus-define-keys (gnus-group-soup-map "s" gnus-group-group-map)
655  "b" gnus-group-brew-soup
656  "w" gnus-soup-save-areas
657  "s" gnus-soup-send-replies
658  "p" gnus-soup-pack-packet
659  "r" nnsoup-pack-replies)
660
661(gnus-define-keys (gnus-group-sort-map "S" gnus-group-group-map)
662  "s" gnus-group-sort-groups
663  "a" gnus-group-sort-groups-by-alphabet
664  "u" gnus-group-sort-groups-by-unread
665  "l" gnus-group-sort-groups-by-level
666  "v" gnus-group-sort-groups-by-score
667  "r" gnus-group-sort-groups-by-rank
668  "m" gnus-group-sort-groups-by-method
669  "n" gnus-group-sort-groups-by-real-name)
670
671(gnus-define-keys (gnus-group-sort-selected-map "P" gnus-group-group-map)
672  "s" gnus-group-sort-selected-groups
673  "a" gnus-group-sort-selected-groups-by-alphabet
674  "u" gnus-group-sort-selected-groups-by-unread
675  "l" gnus-group-sort-selected-groups-by-level
676  "v" gnus-group-sort-selected-groups-by-score
677  "r" gnus-group-sort-selected-groups-by-rank
678  "m" gnus-group-sort-selected-groups-by-method
679  "n" gnus-group-sort-selected-groups-by-real-name)
680
681(gnus-define-keys (gnus-group-list-map "A" gnus-group-mode-map)
682  "k" gnus-group-list-killed
683  "z" gnus-group-list-zombies
684  "s" gnus-group-list-groups
685  "u" gnus-group-list-all-groups
686  "A" gnus-group-list-active
687  "a" gnus-group-apropos
688  "d" gnus-group-description-apropos
689  "m" gnus-group-list-matching
690  "M" gnus-group-list-all-matching
691  "l" gnus-group-list-level
692  "c" gnus-group-list-cached
693  "?" gnus-group-list-dormant)
694
695(gnus-define-keys (gnus-group-list-limit-map "/" gnus-group-list-map)
696  "k"  gnus-group-list-limit
697  "z"  gnus-group-list-limit
698  "s"  gnus-group-list-limit
699  "u"  gnus-group-list-limit
700  "A"  gnus-group-list-limit
701  "m"  gnus-group-list-limit
702  "M"  gnus-group-list-limit
703  "l"  gnus-group-list-limit
704  "c"  gnus-group-list-limit
705  "?"  gnus-group-list-limit)
706
707(gnus-define-keys (gnus-group-list-flush-map "f" gnus-group-list-map)
708  "k"  gnus-group-list-flush
709  "z"  gnus-group-list-flush
710  "s"  gnus-group-list-flush
711  "u"  gnus-group-list-flush
712  "A"  gnus-group-list-flush
713  "m"  gnus-group-list-flush
714  "M"  gnus-group-list-flush
715  "l"  gnus-group-list-flush
716  "c"  gnus-group-list-flush
717  "?"  gnus-group-list-flush)
718
719(gnus-define-keys (gnus-group-list-plus-map "p" gnus-group-list-map)
720  "k"  gnus-group-list-plus
721  "z"  gnus-group-list-plus
722  "s"  gnus-group-list-plus
723  "u"  gnus-group-list-plus
724  "A"  gnus-group-list-plus
725  "m"  gnus-group-list-plus
726  "M"  gnus-group-list-plus
727  "l"  gnus-group-list-plus
728  "c"  gnus-group-list-plus
729  "?"  gnus-group-list-plus)
730
731(gnus-define-keys (gnus-group-score-map "W" gnus-group-mode-map)
732  "f" gnus-score-flush-cache)
733
734(gnus-define-keys (gnus-group-help-map "H" gnus-group-mode-map)
735  "c" gnus-group-fetch-charter
736  "C" gnus-group-fetch-control
737  "d" gnus-group-describe-group
738  "f" gnus-group-fetch-faq
739  "v" gnus-version)
740
741(gnus-define-keys (gnus-group-sub-map "S" gnus-group-mode-map)
742  "l" gnus-group-set-current-level
743  "t" gnus-group-unsubscribe-current-group
744  "s" gnus-group-unsubscribe-group
745  "k" gnus-group-kill-group
746  "y" gnus-group-yank-group
747  "w" gnus-group-kill-region
748  "\C-k" gnus-group-kill-level
749  "z" gnus-group-kill-all-zombies)
750
751(defun gnus-topic-mode-p ()
752  "Return non-nil in `gnus-topic-mode'."
753  (and (boundp 'gnus-topic-mode)
754       (symbol-value 'gnus-topic-mode)))
755
756(defun gnus-group-make-menu-bar ()
757  (gnus-turn-off-edit-menu 'group)
758  (unless (boundp 'gnus-group-reading-menu)
759
760    (easy-menu-define
761     gnus-group-reading-menu gnus-group-mode-map ""
762     `("Group"
763       ["Read" gnus-group-read-group
764	:included (not (gnus-topic-mode-p))
765	:active (gnus-group-group-name)]
766       ["Read " gnus-topic-read-group
767	:included (gnus-topic-mode-p)]
768       ["Select" gnus-group-select-group
769	:included (not (gnus-topic-mode-p))
770	:active (gnus-group-group-name)]
771       ["Select " gnus-topic-select-group
772	:included (gnus-topic-mode-p)]
773       ["See old articles" (gnus-group-select-group 'all)
774	:keys "C-u SPC" :active (gnus-group-group-name)]
775       ["Catch up" gnus-group-catchup-current
776	:included (not (gnus-topic-mode-p))
777	:active (gnus-group-group-name)
778	,@(if (featurep 'xemacs) nil
779	    '(:help "Mark unread articles in the current group as read"))]
780       ["Catch up " gnus-topic-catchup-articles
781	:included (gnus-topic-mode-p)
782	,@(if (featurep 'xemacs) nil
783	    '(:help "Mark unread articles in the current group or topic as read"))]
784       ["Catch up all articles" gnus-group-catchup-current-all
785	(gnus-group-group-name)]
786       ["Check for new articles" gnus-group-get-new-news-this-group
787	:included (not (gnus-topic-mode-p))
788	:active (gnus-group-group-name)
789	,@(if (featurep 'xemacs) nil
790	    '(:help "Check for new messages in current group"))]
791       ["Check for new articles " gnus-topic-get-new-news-this-topic
792	:included (gnus-topic-mode-p)
793	,@(if (featurep 'xemacs) nil
794	    '(:help "Check for new messages in current group or topic"))]
795       ["Toggle subscription" gnus-group-unsubscribe-current-group
796	(gnus-group-group-name)]
797       ["Kill" gnus-group-kill-group :active (gnus-group-group-name)
798	,@(if (featurep 'xemacs) nil
799	      '(:help "Kill (remove) current group"))]
800       ["Yank" gnus-group-yank-group gnus-list-of-killed-groups]
801       ["Describe" gnus-group-describe-group :active (gnus-group-group-name)
802	,@(if (featurep 'xemacs) nil
803	    '(:help "Display description of the current group"))]
804       ["Fetch FAQ" gnus-group-fetch-faq (gnus-group-group-name)]
805       ["Fetch charter" gnus-group-fetch-charter
806	:active (gnus-group-group-name)
807	,@(if (featurep 'xemacs) nil
808	    '(:help "Display the charter of the current group"))]
809       ["Fetch control message" gnus-group-fetch-control
810	:active (gnus-group-group-name)
811	,@(if (featurep 'xemacs) nil
812	    '(:help "Display the archived control message for the current group"))]
813       ;; Actually one should check, if any of the marked groups gives t for
814       ;; (gnus-check-backend-function 'request-expire-articles ...)
815       ["Expire articles" gnus-group-expire-articles
816	:included (not (gnus-topic-mode-p))
817	:active (or (and (gnus-group-group-name)
818			 (gnus-check-backend-function
819			  'request-expire-articles
820			  (gnus-group-group-name))) gnus-group-marked)]
821       ["Expire articles " gnus-topic-expire-articles
822	:included (gnus-topic-mode-p)]
823       ["Set group level..." gnus-group-set-current-level
824	(gnus-group-group-name)]
825       ["Select quick" gnus-group-quick-select-group (gnus-group-group-name)]
826       ["Customize" gnus-group-customize (gnus-group-group-name)]
827       ("Edit"
828	["Parameters" gnus-group-edit-group-parameters
829	 :included (not (gnus-topic-mode-p))
830	 :active (gnus-group-group-name)]
831	["Parameters " gnus-topic-edit-parameters
832	 :included (gnus-topic-mode-p)]
833	["Select method" gnus-group-edit-group-method
834	 (gnus-group-group-name)]
835	["Info" gnus-group-edit-group (gnus-group-group-name)]
836	["Local kill file" gnus-group-edit-local-kill (gnus-group-group-name)]
837	["Global kill file" gnus-group-edit-global-kill t])))
838
839    (easy-menu-define
840     gnus-group-group-menu gnus-group-mode-map ""
841     '("Groups"
842       ("Listing"
843	["List unread subscribed groups" gnus-group-list-groups t]
844	["List (un)subscribed groups" gnus-group-list-all-groups t]
845	["List killed groups" gnus-group-list-killed gnus-killed-list]
846	["List zombie groups" gnus-group-list-zombies gnus-zombie-list]
847	["List level..." gnus-group-list-level t]
848	["Describe all groups" gnus-group-describe-all-groups t]
849	["Group apropos..." gnus-group-apropos t]
850	["Group and description apropos..." gnus-group-description-apropos t]
851	["List groups matching..." gnus-group-list-matching t]
852	["List all groups matching..." gnus-group-list-all-matching t]
853	["List active file" gnus-group-list-active t]
854	["List groups with cached" gnus-group-list-cached t]
855	["List groups with dormant" gnus-group-list-dormant t])
856       ("Sort"
857	["Default sort" gnus-group-sort-groups t]
858	["Sort by method" gnus-group-sort-groups-by-method t]
859	["Sort by rank" gnus-group-sort-groups-by-rank t]
860	["Sort by score" gnus-group-sort-groups-by-score t]
861	["Sort by level" gnus-group-sort-groups-by-level t]
862	["Sort by unread" gnus-group-sort-groups-by-unread t]
863	["Sort by name" gnus-group-sort-groups-by-alphabet t]
864	["Sort by real name" gnus-group-sort-groups-by-real-name t])
865       ("Sort process/prefixed"
866	["Default sort" gnus-group-sort-selected-groups
867	 (not (gnus-topic-mode-p))]
868	["Sort by method" gnus-group-sort-selected-groups-by-method
869	 (not (gnus-topic-mode-p))]
870	["Sort by rank" gnus-group-sort-selected-groups-by-rank
871	 (not (gnus-topic-mode-p))]
872	["Sort by score" gnus-group-sort-selected-groups-by-score
873	 (not (gnus-topic-mode-p))]
874	["Sort by level" gnus-group-sort-selected-groups-by-level
875	 (not (gnus-topic-mode-p))]
876	["Sort by unread" gnus-group-sort-selected-groups-by-unread
877	 (not (gnus-topic-mode-p))]
878	["Sort by name" gnus-group-sort-selected-groups-by-alphabet
879	 (not (gnus-topic-mode-p))]
880	["Sort by real name" gnus-group-sort-selected-groups-by-real-name
881	 (not (gnus-topic-mode-p))])
882       ("Mark"
883	["Mark group" gnus-group-mark-group
884	 (and (gnus-group-group-name)
885	      (not (memq (gnus-group-group-name) gnus-group-marked)))]
886	["Unmark group" gnus-group-unmark-group
887	 (and (gnus-group-group-name)
888	      (memq (gnus-group-group-name) gnus-group-marked))]
889	["Unmark all" gnus-group-unmark-all-groups gnus-group-marked]
890	["Mark regexp..." gnus-group-mark-regexp t]
891	["Mark region" gnus-group-mark-region :active (gnus-mark-active-p)]
892	["Mark buffer" gnus-group-mark-buffer t]
893	["Execute command" gnus-group-universal-argument
894	 (or gnus-group-marked (gnus-group-group-name))])
895       ("Subscribe"
896	["Subscribe to a group..." gnus-group-unsubscribe-group t]
897	["Kill all newsgroups in region" gnus-group-kill-region
898	 :active (gnus-mark-active-p)]
899	["Kill all zombie groups" gnus-group-kill-all-zombies
900	 gnus-zombie-list]
901	["Kill all groups on level..." gnus-group-kill-level t])
902       ("Foreign groups"
903	["Make a foreign group..." gnus-group-make-group t]
904	["Add a directory group..." gnus-group-make-directory-group t]
905	["Add the help group" gnus-group-make-help-group t]
906	["Add the archive group" gnus-group-make-archive-group t]
907	["Make a doc group..." gnus-group-make-doc-group t]
908	["Make a web group..." gnus-group-make-web-group t]
909	["Make a kiboze group..." gnus-group-make-kiboze-group t]
910	["Make a virtual group..." gnus-group-make-empty-virtual t]
911	["Add a group to a virtual..." gnus-group-add-to-virtual t]
912	["Make an ephemeral group..." gnus-group-read-ephemeral-group t]
913	["Make an RSS group..." gnus-group-make-rss-group t]
914	["Rename group..." gnus-group-rename-group
915	 (gnus-check-backend-function
916	  'request-rename-group (gnus-group-group-name))]
917	["Delete group" gnus-group-delete-group
918	 (gnus-check-backend-function
919	  'request-delete-group (gnus-group-group-name))])
920       ("Move"
921	["Next" gnus-group-next-group t]
922	["Previous" gnus-group-prev-group t]
923	["Next unread" gnus-group-next-unread-group t]
924	["Previous unread" gnus-group-prev-unread-group t]
925	["Next unread same level" gnus-group-next-unread-group-same-level t]
926	["Previous unread same level"
927	 gnus-group-prev-unread-group-same-level t]
928	["Jump to group..." gnus-group-jump-to-group t]
929	["First unread group" gnus-group-first-unread-group t]
930	["Best unread group" gnus-group-best-unread-group t])
931       ("Sieve"
932	["Generate" gnus-sieve-generate t]
933	["Generate and update" gnus-sieve-update t])
934       ["Delete bogus groups" gnus-group-check-bogus-groups t]
935       ["Find new newsgroups" gnus-group-find-new-groups t]
936       ["Transpose" gnus-group-transpose-groups
937	(gnus-group-group-name)]
938       ["Read a directory as a group..." gnus-group-enter-directory t]))
939
940    (easy-menu-define
941     gnus-group-misc-menu gnus-group-mode-map ""
942     `("Gnus"
943       ("SOUP"
944	["Pack replies" nnsoup-pack-replies (fboundp 'nnsoup-request-group)]
945	["Send replies" gnus-soup-send-replies
946	 (fboundp 'gnus-soup-pack-packet)]
947	["Pack packet" gnus-soup-pack-packet (fboundp 'gnus-soup-pack-packet)]
948	["Save areas" gnus-soup-save-areas (fboundp 'gnus-soup-pack-packet)]
949	["Brew SOUP" gnus-group-brew-soup (fboundp 'gnus-soup-pack-packet)])
950       ["Send a mail" gnus-group-mail t]
951       ["Send a message (mail or news)" gnus-group-post-news t]
952       ["Create a local message" gnus-group-news t]
953       ["Check for new news" gnus-group-get-new-news
954	,@(if (featurep 'xemacs) '(t)
955	    '(:help "Get newly arrived articles"))
956	]
957       ["Send queued messages" gnus-delay-send-queue
958	,@(if (featurep 'xemacs) '(t)
959	    '(:help "Send all messages that are scheduled to be sent now"))
960	]
961       ["Activate all groups" gnus-activate-all-groups t]
962       ["Restart Gnus" gnus-group-restart t]
963       ["Read init file" gnus-group-read-init-file t]
964       ["Browse foreign server..." gnus-group-browse-foreign-server t]
965       ["Enter server buffer" gnus-group-enter-server-mode t]
966       ["Expire all expirable articles" gnus-group-expire-all-groups t]
967       ["Generate any kiboze groups" nnkiboze-generate-groups t]
968       ["Gnus version" gnus-version t]
969       ["Save .newsrc files" gnus-group-save-newsrc t]
970       ["Suspend Gnus" gnus-group-suspend t]
971       ["Clear dribble buffer" gnus-group-clear-dribble t]
972       ["Read manual" gnus-info-find-node t]
973       ["Flush score cache" gnus-score-flush-cache t]
974       ["Toggle topics" gnus-topic-mode t]
975       ["Send a bug report" gnus-bug t]
976       ["Exit from Gnus" gnus-group-exit
977	,@(if (featurep 'xemacs) '(t)
978	    '(:help "Quit reading news"))]
979       ["Exit without saving" gnus-group-quit t]))
980
981    (gnus-run-hooks 'gnus-group-menu-hook)))
982
983
984(defvar gnus-group-tool-bar-map nil)
985
986(defun gnus-group-tool-bar-update (&optional symbol value)
987  "Update group buffer toolbar.
988Setter function for custom variables."
989  (when symbol
990    (set-default symbol value))
991  ;; (setq-default gnus-group-tool-bar-map nil)
992  ;; (use-local-map gnus-group-mode-map)
993  (when (gnus-alive-p)
994    (with-current-buffer gnus-group-buffer
995      (gnus-group-make-tool-bar t))))
996
997(defcustom gnus-group-tool-bar (if (eq gmm-tool-bar-style 'gnome)
998				   'gnus-group-tool-bar-gnome
999				 'gnus-group-tool-bar-retro)
1000  "Specifies the Gnus group tool bar.
1001
1002It can be either a list or a symbol refering to a list.  See
1003`gmm-tool-bar-from-list' for the format of the list.  The
1004default key map is `gnus-group-mode-map'.
1005
1006Pre-defined symbols include `gnus-group-tool-bar-gnome' and
1007`gnus-group-tool-bar-retro'."
1008  :type '(choice (const :tag "GNOME style" gnus-group-tool-bar-gnome)
1009		 (const :tag "Retro look" gnus-group-tool-bar-retro)
1010		 (repeat :tag "User defined list" gmm-tool-bar-item)
1011		 (symbol))
1012  :version "22.1" ;; Gnus 5.10.9
1013  :initialize 'custom-initialize-default
1014  :set 'gnus-group-tool-bar-update
1015  :group 'gnus-group)
1016
1017(defcustom gnus-group-tool-bar-gnome
1018  '((gnus-group-post-news "mail/compose")
1019    ;; Some useful agent icons?  I don't use the agent so agent users should
1020    ;; suggest useful commands:
1021    (gnus-agent-toggle-plugged "disconnect" t
1022			       :help "Gnus is currently unplugged.  Click to work online."
1023     			       :visible (and gnus-agent (not gnus-plugged)))
1024    (gnus-agent-toggle-plugged "connect" t
1025			       :help "Gnus is currently plugged.  Click to work offline."
1026     			       :visible (and gnus-agent gnus-plugged))
1027    ;; FIXME: gnus-agent-toggle-plugged (in gnus-agent-group-make-menu-bar)
1028    ;; should have a better help text.
1029    (gnus-group-send-queue "mail/outbox" t
1030			   :visible (and gnus-agent gnus-plugged)
1031			   :help "Send articles from the queue group")
1032    (gnus-group-get-new-news "mail/inbox" nil
1033			     :visible (or (not gnus-agent)
1034					  gnus-plugged))
1035    ;; FIXME: gnus-*-read-group should have a better help text.
1036    (gnus-topic-read-group "open" nil
1037			   :visible (and (boundp 'gnus-topic-mode)
1038					 gnus-topic-mode))
1039    (gnus-group-read-group "open" nil
1040			   :visible (not (and (boundp 'gnus-topic-mode)
1041					      gnus-topic-mode)))
1042    ;; (gnus-group-find-new-groups "???" nil)
1043    (gnus-group-save-newsrc "save")
1044    (gnus-group-describe-group "describe")
1045    (gnus-group-unsubscribe-current-group "gnus/toggle-subscription")
1046    (gnus-group-prev-unread-group "left-arrow")
1047    (gnus-group-next-unread-group "right-arrow")
1048    (gnus-group-exit "exit")
1049    (gmm-customize-mode "preferences" t :help "Edit mode preferences")
1050    (gnus-info-find-node "help"))
1051  "List of functions for the group tool bar (GNOME style).
1052
1053See `gmm-tool-bar-from-list' for the format of the list."
1054  :type '(repeat gmm-tool-bar-item)
1055  :version "22.1" ;; Gnus 5.10.9
1056  :initialize 'custom-initialize-default
1057  :set 'gnus-group-tool-bar-update
1058  :group 'gnus-group)
1059
1060(defcustom gnus-group-tool-bar-retro
1061  '((gnus-group-get-new-news "gnus/get-news")
1062    (gnus-group-get-new-news-this-group "gnus/gnntg")
1063    (gnus-group-catchup-current "gnus/catchup")
1064    (gnus-group-describe-group "gnus/describe-group")
1065    (gnus-group-subscribe "gnus/subscribe" t
1066			  :help "Subscribe to the current group")
1067    (gnus-group-unsubscribe "gnus/unsubscribe" t
1068			    :help "Unsubscribe from the current group")
1069    (gnus-group-exit "gnus/exit-gnus" gnus-group-mode-map))
1070  "List of functions for the group tool bar (retro look).
1071
1072See `gmm-tool-bar-from-list' for the format of the list."
1073  :type '(repeat gmm-tool-bar-item)
1074  :version "22.1" ;; Gnus 5.10.9
1075  :initialize 'custom-initialize-default
1076  :set 'gnus-group-tool-bar-update
1077  :group 'gnus-group)
1078
1079(defcustom gnus-group-tool-bar-zap-list t
1080  "List of icon items from the global tool bar.
1081These items are not displayed in the Gnus group mode tool bar.
1082
1083See `gmm-tool-bar-from-list' for the format of the list."
1084  :type 'gmm-tool-bar-zap-list
1085  :version "22.1" ;; Gnus 5.10.9
1086  :initialize 'custom-initialize-default
1087  :set 'gnus-group-tool-bar-update
1088  :group 'gnus-group)
1089
1090(defvar image-load-path)
1091
1092(defun gnus-group-make-tool-bar (&optional force)
1093  "Make a group mode tool bar from `gnus-group-tool-bar'.
1094When FORCE, rebuild the tool bar."
1095  (when (and (not (featurep 'xemacs))
1096	     (boundp 'tool-bar-mode)
1097	     tool-bar-mode
1098	     ;; The Gnus 5.10.6 code checked (default-value 'tool-bar-mode).
1099	     ;; Why?  --rsteib
1100	     (or (not gnus-group-tool-bar-map) force))
1101    (let* ((load-path
1102	    (gmm-image-load-path-for-library "gnus"
1103					     "gnus/toggle-subscription.xpm"
1104					     nil t))
1105           (image-load-path (cons (car load-path)
1106                                  (when (boundp 'image-load-path)
1107                                    image-load-path)))
1108	   (map (gmm-tool-bar-from-list gnus-group-tool-bar
1109					gnus-group-tool-bar-zap-list
1110					'gnus-group-mode-map)))
1111      (if map
1112	  (set (make-local-variable 'tool-bar-map) map))))
1113  gnus-group-tool-bar-map)
1114
1115(defun gnus-group-mode ()
1116  "Major mode for reading news.
1117
1118All normal editing commands are switched off.
1119\\<gnus-group-mode-map>
1120The group buffer lists (some of) the groups available.  For instance,
1121`\\[gnus-group-list-groups]' will list all subscribed groups with unread articles, while `\\[gnus-group-list-zombies]'
1122lists all zombie groups.
1123
1124Groups that are displayed can be entered with `\\[gnus-group-read-group]'.  To subscribe
1125to a group not displayed, type `\\[gnus-group-unsubscribe-group]'.
1126
1127For more in-depth information on this mode, read the manual (`\\[gnus-info-find-node]').
1128
1129The following commands are available:
1130
1131\\{gnus-group-mode-map}"
1132  (interactive)
1133  (kill-all-local-variables)
1134  (when (gnus-visual-p 'group-menu 'menu)
1135    (gnus-group-make-menu-bar)
1136    (gnus-group-make-tool-bar))
1137  (gnus-simplify-mode-line)
1138  (setq major-mode 'gnus-group-mode)
1139  (setq mode-name "Group")
1140  (gnus-group-set-mode-line)
1141  (setq mode-line-process nil)
1142  (use-local-map gnus-group-mode-map)
1143  (buffer-disable-undo)
1144  (setq truncate-lines t)
1145  (setq buffer-read-only t)
1146  (gnus-set-default-directory)
1147  (gnus-update-format-specifications nil 'group 'group-mode)
1148  (gnus-update-group-mark-positions)
1149  (when gnus-use-undo
1150    (gnus-undo-mode 1))
1151  (when gnus-slave
1152    (gnus-slave-mode))
1153  (gnus-run-mode-hooks 'gnus-group-mode-hook))
1154
1155(defun gnus-update-group-mark-positions ()
1156  (save-excursion
1157    (let ((gnus-process-mark ?\200)
1158	  (gnus-group-update-hook nil)
1159	  (gnus-group-marked '("dummy.group"))
1160	  (gnus-active-hashtb (make-vector 10 0))
1161	  (topic ""))
1162      (gnus-set-active "dummy.group" '(0 . 0))
1163      (gnus-set-work-buffer)
1164      (gnus-group-insert-group-line "dummy.group" 0 nil 0 nil)
1165      (goto-char (point-min))
1166      (setq gnus-group-mark-positions
1167	    (list (cons 'process (and (search-forward
1168				       (mm-string-as-multibyte "\200") nil t)
1169				      (- (point) 2))))))))
1170
1171(defun gnus-mouse-pick-group (e)
1172  "Enter the group under the mouse pointer."
1173  (interactive "e")
1174  (mouse-set-point e)
1175  (gnus-group-read-group nil))
1176
1177;; Look at LEVEL and find out what the level is really supposed to be.
1178;; If LEVEL is non-nil, LEVEL will be returned, if not, what happens
1179;; will depend on whether `gnus-group-use-permanent-levels' is used.
1180(defun gnus-group-default-level (&optional level number-or-nil)
1181  (cond
1182   (gnus-group-use-permanent-levels
1183    (or (setq gnus-group-use-permanent-levels
1184	      (or level (if (numberp gnus-group-use-permanent-levels)
1185			    gnus-group-use-permanent-levels
1186			  (or gnus-group-default-list-level
1187			      gnus-level-subscribed))))
1188	gnus-group-default-list-level gnus-level-subscribed))
1189   (number-or-nil
1190    level)
1191   (t
1192    (or level gnus-group-default-list-level gnus-level-subscribed))))
1193
1194(defun gnus-group-setup-buffer ()
1195  (set-buffer (gnus-get-buffer-create gnus-group-buffer))
1196  (unless (eq major-mode 'gnus-group-mode)
1197    (gnus-group-mode)
1198    (when gnus-carpal
1199      (gnus-carpal-setup-buffer 'group))))
1200
1201(defun gnus-group-name-charset (method group)
1202  (if (null method)
1203      (setq method (gnus-find-method-for-group group)))
1204  (let ((item (assoc method gnus-group-name-charset-method-alist))
1205	(alist gnus-group-name-charset-group-alist)
1206	result)
1207    (if item
1208	(cdr item)
1209      (while (setq item (pop alist))
1210	(if (string-match (car item) group)
1211	    (setq alist nil
1212		  result (cdr item))))
1213      result)))
1214
1215(defun gnus-group-name-decode (string charset)
1216  ;; Fixme: Don't decode in unibyte mode.
1217  (if (and string charset (featurep 'mule))
1218      (mm-decode-coding-string string charset)
1219    string))
1220
1221(defun gnus-group-decoded-name (string)
1222  (let ((charset (gnus-group-name-charset nil string)))
1223    (gnus-group-name-decode string charset)))
1224
1225(defun gnus-group-list-groups (&optional level unread lowest)
1226  "List newsgroups with level LEVEL or lower that have unread articles.
1227Default is all subscribed groups.
1228If argument UNREAD is non-nil, groups with no unread articles are also
1229listed.
1230
1231Also see the `gnus-group-use-permanent-levels' variable."
1232  (interactive
1233   (list (if current-prefix-arg
1234	     (prefix-numeric-value current-prefix-arg)
1235	   (or
1236	    (gnus-group-default-level nil t)
1237	    gnus-group-default-list-level
1238	    gnus-level-subscribed))))
1239  (unless level
1240    (setq level (car gnus-group-list-mode)
1241	  unread (cdr gnus-group-list-mode)))
1242  (setq level (gnus-group-default-level level))
1243  (gnus-group-setup-buffer)
1244  (gnus-update-format-specifications nil 'group 'group-mode)
1245  (let ((case-fold-search nil)
1246	(props (text-properties-at (gnus-point-at-bol)))
1247	(empty (= (point-min) (point-max)))
1248	(group (gnus-group-group-name))
1249	number)
1250    (set-buffer gnus-group-buffer)
1251    (setq number (funcall gnus-group-prepare-function level unread lowest))
1252    (when (or (and (numberp number)
1253		   (zerop number))
1254	      (zerop (buffer-size)))
1255      ;; No groups in the buffer.
1256      (gnus-message 5 gnus-no-groups-message))
1257    ;; We have some groups displayed.
1258    (goto-char (point-max))
1259    (when (or (not gnus-group-goto-next-group-function)
1260	      (not (funcall gnus-group-goto-next-group-function
1261			    group props)))
1262      (cond
1263       (empty
1264	(goto-char (point-min)))
1265       ((not group)
1266	;; Go to the first group with unread articles.
1267	(gnus-group-search-forward t))
1268       (t
1269	;; Find the right group to put point on.  If the current group
1270	;; has disappeared in the new listing, try to find the next
1271	;; one.  If no next one can be found, just leave point at the
1272	;; first newsgroup in the buffer.
1273	(when (not (gnus-goto-char
1274		    (text-property-any
1275		     (point-min) (point-max)
1276		     'gnus-group (gnus-intern-safe
1277				  group gnus-active-hashtb))))
1278	  (let ((newsrc (cdddr (gnus-gethash group gnus-newsrc-hashtb))))
1279	    (while (and newsrc
1280			(not (gnus-goto-char
1281			      (text-property-any
1282			       (point-min) (point-max) 'gnus-group
1283			       (gnus-intern-safe
1284				(caar newsrc) gnus-active-hashtb)))))
1285	      (setq newsrc (cdr newsrc)))
1286	    (unless newsrc
1287	      (goto-char (point-max))
1288	      (forward-line -1)))))))
1289    ;; Adjust cursor point.
1290    (gnus-group-position-point)))
1291
1292(defun gnus-group-list-level (level &optional all)
1293  "List groups on LEVEL.
1294If ALL (the prefix), also list groups that have no unread articles."
1295  (interactive "nList groups on level: \nP")
1296  (gnus-group-list-groups level all level))
1297
1298(defun gnus-group-prepare-logic (group test)
1299  (or (and gnus-group-listed-groups
1300	   (null gnus-group-list-option)
1301	   (member group gnus-group-listed-groups))
1302      (cond
1303       ((null gnus-group-listed-groups) test)
1304       ((null gnus-group-list-option) test)
1305       (t (and (member group gnus-group-listed-groups)
1306	       (if (eq gnus-group-list-option 'flush)
1307		   (not test)
1308		 test))))))
1309
1310(defun gnus-group-prepare-flat (level &optional predicate lowest regexp)
1311  "List all newsgroups with unread articles of level LEVEL or lower.
1312If PREDICATE is a function, list groups that the function returns non-nil;
1313if it is t, list groups that have no unread articles.
1314If LOWEST is non-nil, list all newsgroups of level LOWEST or higher.
1315If REGEXP is a function, list dead groups that the function returns non-nil;
1316if it is a string, only list groups matching REGEXP."
1317  (set-buffer gnus-group-buffer)
1318  (let ((buffer-read-only nil)
1319	(newsrc (cdr gnus-newsrc-alist))
1320	(lowest (or lowest 1))
1321	(not-in-list (and gnus-group-listed-groups
1322			  (copy-sequence gnus-group-listed-groups)))
1323	info clevel unread group params)
1324    (erase-buffer)
1325    (when (or (< lowest gnus-level-zombie)
1326	      gnus-group-listed-groups)
1327      ;; List living groups.
1328      (while newsrc
1329	(setq info (car newsrc)
1330	      group (gnus-info-group info)
1331	      params (gnus-info-params info)
1332	      newsrc (cdr newsrc)
1333	      unread (car (gnus-gethash group gnus-newsrc-hashtb)))
1334	(when not-in-list
1335	  (setq not-in-list (delete group not-in-list)))
1336	(when (gnus-group-prepare-logic
1337	       group
1338	       (and unread		; This group might be unchecked
1339		    (or (not (stringp regexp))
1340			(string-match regexp group))
1341		    (<= (setq clevel (gnus-info-level info)) level)
1342		    (>= clevel lowest)
1343		    (cond
1344		     ((functionp predicate)
1345		      (funcall predicate info))
1346		     (predicate t)	; We list all groups?
1347		     (t
1348		      (or
1349		       (if (eq unread t) ; Unactivated?
1350			   gnus-group-list-inactive-groups
1351					; We list unactivated
1352			 (> unread 0))
1353					; We list groups with unread articles
1354		       (and gnus-list-groups-with-ticked-articles
1355			    (cdr (assq 'tick (gnus-info-marks info))))
1356					; And groups with tickeds
1357		       ;; Check for permanent visibility.
1358		       (and gnus-permanently-visible-groups
1359			    (string-match gnus-permanently-visible-groups
1360					  group))
1361		       (memq 'visible params)
1362		       (cdr (assq 'visible params)))))))
1363	  (gnus-group-insert-group-line
1364	   group (gnus-info-level info)
1365	   (gnus-info-marks info) unread (gnus-info-method info)))))
1366
1367    ;; List dead groups.
1368    (when (or gnus-group-listed-groups
1369	      (and (>= level gnus-level-zombie)
1370		   (<= lowest gnus-level-zombie)))
1371      (gnus-group-prepare-flat-list-dead
1372       (setq gnus-zombie-list (sort gnus-zombie-list 'string<))
1373       gnus-level-zombie ?Z
1374       regexp))
1375    (when not-in-list
1376      (dolist (group gnus-zombie-list)
1377	(setq not-in-list (delete group not-in-list))))
1378    (when (or gnus-group-listed-groups
1379	      (and (>= level gnus-level-killed) (<= lowest gnus-level-killed)))
1380      (gnus-group-prepare-flat-list-dead
1381       (gnus-union
1382	not-in-list
1383	(setq gnus-killed-list (sort gnus-killed-list 'string<)))
1384       gnus-level-killed ?K regexp))
1385
1386    (gnus-group-set-mode-line)
1387    (setq gnus-group-list-mode (cons level predicate))
1388    (gnus-run-hooks 'gnus-group-prepare-hook)
1389    t))
1390
1391(defun gnus-group-prepare-flat-list-dead (groups level mark regexp)
1392  ;; List zombies and killed lists somewhat faster, which was
1393  ;; suggested by Jack Vinson <vinson@unagi.cis.upenn.edu>.  It does
1394  ;; this by ignoring the group format specification altogether.
1395  (let (group)
1396    (if (> (length groups) gnus-group-listing-limit)
1397	(while groups
1398	  (setq group (pop groups))
1399	  (when (gnus-group-prepare-logic
1400		 group
1401		 (or (not regexp)
1402		     (and (stringp regexp) (string-match regexp group))
1403		     (and (functionp regexp) (funcall regexp group))))
1404	    (gnus-add-text-properties
1405	     (point) (prog1 (1+ (point))
1406		       (insert " " mark "     *: "
1407			       (gnus-group-decoded-name group)
1408			       "\n"))
1409	     (list 'gnus-group (gnus-intern-safe group gnus-active-hashtb)
1410		   'gnus-unread t
1411		   'gnus-level level))))
1412      (while groups
1413	(setq group (pop groups))
1414	(when (gnus-group-prepare-logic
1415	       group
1416	       (or (not regexp)
1417		   (and (stringp regexp) (string-match regexp group))
1418		   (and (functionp regexp) (funcall regexp group))))
1419	  (gnus-group-insert-group-line
1420	   group level nil
1421	   (let ((active (gnus-active group)))
1422	     (if active
1423		 (if (zerop (cdr active))
1424		     0
1425		   (- (1+ (cdr active)) (car active)))
1426	       nil))
1427	   (gnus-method-simplify (gnus-find-method-for-group group))))))))
1428
1429(defun gnus-group-update-group-line ()
1430  "Update the current line in the group buffer."
1431  (let* ((buffer-read-only nil)
1432	 (group (gnus-group-group-name))
1433	 (entry (and group (gnus-gethash group gnus-newsrc-hashtb)))
1434	 gnus-group-indentation)
1435    (when group
1436      (and entry
1437	   (not (gnus-ephemeral-group-p group))
1438	   (gnus-dribble-enter
1439	    (concat "(gnus-group-set-info '"
1440		    (gnus-prin1-to-string (nth 2 entry))
1441		    ")")))
1442      (setq gnus-group-indentation (gnus-group-group-indentation))
1443      (gnus-delete-line)
1444      (gnus-group-insert-group-line-info group)
1445      (forward-line -1)
1446      (gnus-group-position-point))))
1447
1448(defun gnus-group-insert-group-line-info (group)
1449  "Insert GROUP on the current line."
1450  (let ((entry (gnus-gethash group gnus-newsrc-hashtb))
1451	(gnus-group-indentation (gnus-group-group-indentation))
1452	active info)
1453    (if entry
1454	(progn
1455	  ;; (Un)subscribed group.
1456	  (setq info (nth 2 entry))
1457	  (gnus-group-insert-group-line
1458	   group (gnus-info-level info) (gnus-info-marks info)
1459	   (or (car entry) t) (gnus-info-method info)))
1460      ;; This group is dead.
1461      (gnus-group-insert-group-line
1462       group
1463       (if (member group gnus-zombie-list) gnus-level-zombie gnus-level-killed)
1464       nil
1465       (if (setq active (gnus-active group))
1466	   (if (zerop (cdr active))
1467	       0
1468	     (- (1+ (cdr active)) (car active)))
1469	 nil)
1470       (gnus-method-simplify (gnus-find-method-for-group group))))))
1471
1472(defun gnus-number-of-unseen-articles-in-group (group)
1473  (let* ((info (nth 2 (gnus-group-entry group)))
1474	 (marked (gnus-info-marks info))
1475	 (seen (cdr (assq 'seen marked)))
1476	 (active (gnus-active group)))
1477    (if (not active)
1478	0
1479      (length (gnus-uncompress-range
1480	       (gnus-range-difference
1481		(gnus-range-difference (list active) (gnus-info-read info))
1482		seen))))))
1483
1484;; Moving through the Group buffer (in topic mode) e.g. with C-n doesn't
1485;; update the state (enabled/disabled) of the icon `gnus-group-describe-group'
1486;; automatically.  After `C-l' the state is correct.  See the following report
1487;; on emacs-devel
1488;; <http://thread.gmane.org/v9acdmrcse.fsf@marauder.physik.uni-ulm.de>:
1489;; From: Reiner Steib
1490;; Subject: tool bar icons not updated according to :active condition
1491;; Newsgroups: gmane.emacs.devel
1492;; Date: Mon, 23 Jan 2006 19:59:13 +0100
1493;; Message-ID: <v9acdmrcse.fsf@marauder.physik.uni-ulm.de>
1494
1495(defcustom gnus-group-update-tool-bar
1496  (and (not (featurep 'xemacs))
1497       (boundp 'tool-bar-mode)
1498       tool-bar-mode
1499       ;; Using `redraw-frame' (see `gnus-tool-bar-update') in Emacs 21 might
1500       ;; be confusing, so maybe we shouldn't call it by default.
1501       (fboundp 'force-window-update))
1502  "Force updating the group buffer tool bar."
1503  :group 'gnus-group
1504  :version "22.1"
1505  :initialize 'custom-initialize-default
1506  :set (lambda (symbol value)
1507	 (set-default symbol value)
1508	 (when (gnus-alive-p)
1509	   (with-current-buffer gnus-group-buffer
1510	     ;; FIXME: Is there a better way to redraw the group buffer?
1511	     (gnus-group-get-new-news 0))))
1512  :type 'boolean)
1513
1514(defun gnus-group-insert-group-line (gnus-tmp-group gnus-tmp-level
1515						    gnus-tmp-marked number
1516						    gnus-tmp-method)
1517  "Insert a group line in the group buffer."
1518  (let* ((gnus-tmp-method
1519	  (gnus-server-get-method gnus-tmp-group gnus-tmp-method))
1520	 (group-name-charset (gnus-group-name-charset gnus-tmp-method
1521						      gnus-tmp-group))
1522	 (gnus-tmp-active (gnus-active gnus-tmp-group))
1523	 (gnus-tmp-number-total
1524	  (if gnus-tmp-active
1525	      (1+ (- (cdr gnus-tmp-active) (car gnus-tmp-active)))
1526	    0))
1527	 (gnus-tmp-number-of-unread
1528	  (if (numberp number) (int-to-string (max 0 number))
1529	    "*"))
1530	 (gnus-tmp-number-of-read
1531	  (if (numberp number)
1532	      (int-to-string (max 0 (- gnus-tmp-number-total number)))
1533	    "*"))
1534	 (gnus-tmp-subscribed
1535	  (cond ((<= gnus-tmp-level gnus-level-subscribed) ? )
1536		((<= gnus-tmp-level gnus-level-unsubscribed) ?U)
1537		((= gnus-tmp-level gnus-level-zombie) ?Z)
1538		(t ?K)))
1539	 (gnus-tmp-qualified-group
1540	  (gnus-group-name-decode (gnus-group-real-name gnus-tmp-group)
1541				  group-name-charset))
1542	 (gnus-tmp-comment
1543	  (or (gnus-group-get-parameter gnus-tmp-group 'comment t)
1544	      gnus-tmp-group))
1545	 (gnus-tmp-newsgroup-description
1546	  (if gnus-description-hashtb
1547	      (or (gnus-group-name-decode
1548		   (gnus-gethash gnus-tmp-group gnus-description-hashtb)
1549		   group-name-charset) "")
1550	    ""))
1551	 (gnus-tmp-moderated
1552	  (if (and gnus-moderated-hashtb
1553		   (gnus-gethash gnus-tmp-group gnus-moderated-hashtb))
1554	      ?m ? ))
1555	 (gnus-tmp-moderated-string
1556	  (if (eq gnus-tmp-moderated ?m) "(m)" ""))
1557	 (gnus-tmp-group-icon "==&&==")
1558	 (gnus-tmp-news-server (or (cadr gnus-tmp-method) ""))
1559	 (gnus-tmp-news-method (or (car gnus-tmp-method) ""))
1560	 (gnus-tmp-news-method-string
1561	  (if gnus-tmp-method
1562	      (format "(%s:%s)" (car gnus-tmp-method)
1563		      (cadr gnus-tmp-method)) ""))
1564	 (gnus-tmp-marked-mark
1565	  (if (and (numberp number)
1566		   (zerop number)
1567		   (cdr (assq 'tick gnus-tmp-marked)))
1568	      ?* ? ))
1569	 (gnus-tmp-summary-live
1570	  (if (and (not gnus-group-is-exiting-p)
1571		   (gnus-buffer-live-p (gnus-summary-buffer-name
1572					gnus-tmp-group)))
1573	      ?* ? ))
1574	 (gnus-tmp-process-marked
1575	  (if (member gnus-tmp-group gnus-group-marked)
1576	      gnus-process-mark ? ))
1577	 (gnus-tmp-grouplens
1578	  (or (and gnus-use-grouplens
1579		   (bbb-grouplens-group-p gnus-tmp-group))
1580	      ""))
1581	 (buffer-read-only nil)
1582	 beg end
1583	 header gnus-tmp-header)	; passed as parameter to user-funcs.
1584    (beginning-of-line)
1585    (setq beg (point))
1586    (gnus-add-text-properties
1587     (point)
1588     (prog1 (1+ (point))
1589       ;; Insert the text.
1590       (let ((gnus-tmp-decoded-group (gnus-group-name-decode
1591				      gnus-tmp-group group-name-charset)))
1592	 (eval gnus-group-line-format-spec)))
1593     `(gnus-group ,(gnus-intern-safe gnus-tmp-group gnus-active-hashtb)
1594		  gnus-unread ,(if (numberp number)
1595				   (string-to-number gnus-tmp-number-of-unread)
1596				 t)
1597		  gnus-marked ,gnus-tmp-marked-mark
1598		  gnus-indentation ,gnus-group-indentation
1599		  gnus-level ,gnus-tmp-level))
1600    (setq end (point))
1601    (when gnus-group-update-tool-bar
1602      (gnus-put-text-property beg end 'point-entered
1603			      'gnus-tool-bar-update)
1604      (gnus-put-text-property beg end 'point-left
1605			      'gnus-tool-bar-update))
1606    (forward-line -1)
1607    (when (inline (gnus-visual-p 'group-highlight 'highlight))
1608      (gnus-run-hooks 'gnus-group-update-hook))
1609    (forward-line)
1610    ;; Allow XEmacs to remove front-sticky text properties.
1611    (gnus-group-remove-excess-properties)))
1612
1613(defun gnus-group-highlight-line ()
1614  "Highlight the current line according to `gnus-group-highlight'."
1615  (let* ((list gnus-group-highlight)
1616	 (p (point))
1617	 (end (gnus-point-at-eol))
1618	 ;; now find out where the line starts and leave point there.
1619	 (beg (progn (beginning-of-line) (point)))
1620	 (group (gnus-group-group-name))
1621	 (entry (gnus-group-entry group))
1622	 (unread (if (numberp (car entry)) (car entry) 0))
1623	 (active (gnus-active group))
1624	 (total (if active (1+ (- (cdr active) (car active))) 0))
1625	 (info (nth 2 entry))
1626	 (method (inline (gnus-server-get-method group (gnus-info-method info))))
1627	 (marked (gnus-info-marks info))
1628	 (mailp (apply 'append
1629		       (mapcar
1630			(lambda (x)
1631			  (memq x (assoc (symbol-name
1632					  (car (or method gnus-select-method)))
1633					 gnus-valid-select-methods)))
1634			'(mail post-mail))))
1635	 (level (or (gnus-info-level info) gnus-level-killed))
1636	 (score (or (gnus-info-score info) 0))
1637	 (ticked (gnus-range-length (cdr (assq 'tick marked))))
1638	 (group-age (gnus-group-timestamp-delta group))
1639	 (inhibit-read-only t))
1640    ;; Eval the cars of the lists until we find a match.
1641    (while (and list
1642		(not (eval (caar list))))
1643      (setq list (cdr list)))
1644    (let ((face (cdar list)))
1645      (unless (eq face (get-text-property beg 'face))
1646	(gnus-put-text-property-excluding-characters-with-faces
1647	 beg end 'face
1648	 (setq face (if (boundp face) (symbol-value face) face)))
1649	(gnus-extent-start-open beg)))
1650    (goto-char p)))
1651
1652(defun gnus-group-update-group (group &optional visible-only)
1653  "Update all lines where GROUP appear.
1654If VISIBLE-ONLY is non-nil, the group won't be displayed if it isn't
1655already."
1656  ;; Can't use `save-excursion' here, so we do it manually.
1657  (let ((buf (current-buffer))
1658	mark)
1659    (set-buffer gnus-group-buffer)
1660    (setq mark (point-marker))
1661    ;; The buffer may be narrowed.
1662    (save-restriction
1663      (widen)
1664      (let ((ident (gnus-intern-safe group gnus-active-hashtb))
1665	    (loc (point-min))
1666	    found buffer-read-only)
1667	;; Enter the current status into the dribble buffer.
1668	(let ((entry (gnus-gethash group gnus-newsrc-hashtb)))
1669	  (when (and entry
1670		     (not (gnus-ephemeral-group-p group)))
1671	    (gnus-dribble-enter
1672	     (concat "(gnus-group-set-info '"
1673		     (gnus-prin1-to-string (nth 2 entry))
1674		     ")"))))
1675	;; Find all group instances.  If topics are in use, each group
1676	;; may be listed in more than once.
1677	(while (setq loc (text-property-any
1678			  loc (point-max) 'gnus-group ident))
1679	  (setq found t)
1680	  (goto-char loc)
1681	  (let ((gnus-group-indentation (gnus-group-group-indentation)))
1682	    (gnus-delete-line)
1683	    (gnus-group-insert-group-line-info group)
1684	    (save-excursion
1685	      (forward-line -1)
1686	      (gnus-run-hooks 'gnus-group-update-group-hook)))
1687	  (setq loc (1+ loc)))
1688	(unless (or found visible-only)
1689	  ;; No such line in the buffer, find out where it's supposed to
1690	  ;; go, and insert it there (or at the end of the buffer).
1691	  (if gnus-goto-missing-group-function
1692	      (funcall gnus-goto-missing-group-function group)
1693	    (let ((entry (cddr (gnus-gethash group gnus-newsrc-hashtb))))
1694	      (while (and entry (car entry)
1695			  (not
1696			   (gnus-goto-char
1697			    (text-property-any
1698			     (point-min) (point-max)
1699			     'gnus-group (gnus-intern-safe
1700					  (caar entry) gnus-active-hashtb)))))
1701		(setq entry (cdr entry)))
1702	      (or entry (goto-char (point-max)))))
1703	  ;; Finally insert the line.
1704	  (let ((gnus-group-indentation (gnus-group-group-indentation)))
1705	    (gnus-group-insert-group-line-info group)
1706	    (save-excursion
1707	      (forward-line -1)
1708	      (gnus-run-hooks 'gnus-group-update-group-hook))))
1709	(when gnus-group-update-group-function
1710	  (funcall gnus-group-update-group-function group))
1711	(gnus-group-set-mode-line)))
1712    (goto-char mark)
1713    (set-marker mark nil)
1714    (set-buffer buf)))
1715
1716(defun gnus-group-set-mode-line ()
1717  "Update the mode line in the group buffer."
1718  (when (memq 'group gnus-updated-mode-lines)
1719    ;; Yes, we want to keep this mode line updated.
1720    (save-excursion
1721      (set-buffer gnus-group-buffer)
1722      (let* ((gformat (or gnus-group-mode-line-format-spec
1723			  (gnus-set-format 'group-mode)))
1724	     (gnus-tmp-news-server (cadr gnus-select-method))
1725	     (gnus-tmp-news-method (car gnus-select-method))
1726	     (gnus-tmp-colon (if (equal gnus-tmp-news-server "") "" ":"))
1727	     (max-len 60)
1728	     gnus-tmp-header		;Dummy binding for user-defined formats
1729	     ;; Get the resulting string.
1730	     (modified
1731	      (and gnus-dribble-buffer
1732		   (buffer-name gnus-dribble-buffer)
1733		   (buffer-modified-p gnus-dribble-buffer)
1734		   (save-excursion
1735		     (set-buffer gnus-dribble-buffer)
1736		     (not (zerop (buffer-size))))))
1737	     (mode-string (eval gformat)))
1738	;; Say whether the dribble buffer has been modified.
1739	(setq mode-line-modified
1740	      (if modified (car gnus-mode-line-modified)
1741		(cdr gnus-mode-line-modified)))
1742	;; If the line is too long, we chop it off.
1743	(when (> (length mode-string) max-len)
1744	  (setq mode-string (substring mode-string 0 (- max-len 4))))
1745	(prog1
1746	    (setq mode-line-buffer-identification
1747		  (gnus-mode-line-buffer-identification
1748		   (list mode-string)))
1749	  (set-buffer-modified-p modified))))))
1750
1751(defun gnus-group-group-name ()
1752  "Get the name of the newsgroup on the current line."
1753  (let ((group (get-text-property (gnus-point-at-bol) 'gnus-group)))
1754    (when group
1755      (symbol-name group))))
1756
1757(defun gnus-group-group-level ()
1758  "Get the level of the newsgroup on the current line."
1759  (get-text-property (gnus-point-at-bol) 'gnus-level))
1760
1761(defun gnus-group-group-indentation ()
1762  "Get the indentation of the newsgroup on the current line."
1763  (or (get-text-property (gnus-point-at-bol) 'gnus-indentation)
1764      (and gnus-group-indentation-function
1765	   (funcall gnus-group-indentation-function))
1766      ""))
1767
1768(defun gnus-group-group-unread ()
1769  "Get the number of unread articles of the newsgroup on the current line."
1770  (get-text-property (gnus-point-at-bol) 'gnus-unread))
1771
1772(defun gnus-group-new-mail (group)
1773  (if (nnmail-new-mail-p (gnus-group-real-name group))
1774      gnus-new-mail-mark
1775    ? ))
1776
1777(defun gnus-group-level (group)
1778  "Return the estimated level of GROUP."
1779  (or (gnus-info-level (gnus-get-info group))
1780      (and (member group gnus-zombie-list) gnus-level-zombie)
1781      gnus-level-killed))
1782
1783(defun gnus-group-search-forward (&optional backward all level first-too)
1784  "Find the next newsgroup with unread articles.
1785If BACKWARD is non-nil, find the previous newsgroup instead.
1786If ALL is non-nil, just find any newsgroup.
1787If LEVEL is non-nil, find group with level LEVEL, or higher if no such
1788group exists.
1789If FIRST-TOO, the current line is also eligible as a target."
1790  (let ((way (if backward -1 1))
1791	(low gnus-level-killed)
1792	(beg (point))
1793	pos found lev)
1794    (if (and backward (progn (beginning-of-line)) (bobp))
1795	nil
1796      (unless first-too
1797	(forward-line way))
1798      (while (and
1799	      (not (eobp))
1800	      (not (setq
1801		    found
1802		    (and
1803		     (get-text-property (point) 'gnus-group)
1804		     (or all
1805			 (and
1806			  (let ((unread
1807				 (get-text-property (point) 'gnus-unread)))
1808			    (and (numberp unread) (> unread 0)))
1809			  (setq lev (get-text-property (point)
1810						       'gnus-level))
1811			  (<= lev gnus-level-subscribed)))
1812		     (or (not level)
1813			 (and (setq lev (get-text-property (point)
1814							   'gnus-level))
1815			      (or (= lev level)
1816				  (and (< lev low)
1817				       (< level lev)
1818				       (progn
1819					 (setq low lev)
1820					 (setq pos (point))
1821					 nil))))))))
1822	      (zerop (forward-line way)))))
1823    (if found
1824	(progn (gnus-group-position-point) t)
1825      (goto-char (or pos beg))
1826      (and pos t))))
1827
1828;;; Gnus group mode commands
1829
1830;; Group marking.
1831
1832(defun gnus-group-mark-line-p ()
1833  (save-excursion
1834    (beginning-of-line)
1835    (forward-char (or (cdr (assq 'process gnus-group-mark-positions)) 2))
1836    (eq (char-after) gnus-process-mark)))
1837
1838(defun gnus-group-mark-group (n &optional unmark no-advance)
1839  "Mark the current group."
1840  (interactive "p")
1841  (let ((buffer-read-only nil)
1842	group)
1843    (while (and (> n 0)
1844		(not (eobp)))
1845      (when (setq group (gnus-group-group-name))
1846	;; Go to the mark position.
1847	(beginning-of-line)
1848	(forward-char (or (cdr (assq 'process gnus-group-mark-positions)) 2))
1849	(subst-char-in-region
1850	 (point) (1+ (point)) (char-after)
1851	 (if unmark
1852	     (progn
1853	       (setq gnus-group-marked (delete group gnus-group-marked))
1854	       ? )
1855	   (setq gnus-group-marked
1856		 (cons group (delete group gnus-group-marked)))
1857	   gnus-process-mark)))
1858      (unless no-advance
1859	(gnus-group-next-group 1))
1860      (decf n))
1861    (gnus-summary-position-point)
1862    n))
1863
1864(defun gnus-group-unmark-group (n)
1865  "Remove the mark from the current group."
1866  (interactive "p")
1867  (gnus-group-mark-group n 'unmark)
1868  (gnus-group-position-point))
1869
1870(defun gnus-group-unmark-all-groups ()
1871  "Unmark all groups."
1872  (interactive)
1873  (let ((groups gnus-group-marked))
1874    (save-excursion
1875      (while groups
1876	(gnus-group-remove-mark (pop groups)))))
1877  (gnus-group-position-point))
1878
1879(defun gnus-group-mark-region (unmark beg end)
1880  "Mark all groups between point and mark.
1881If UNMARK, remove the mark instead."
1882  (interactive "P\nr")
1883  (let ((num (count-lines beg end)))
1884    (save-excursion
1885      (goto-char beg)
1886      (- num (gnus-group-mark-group num unmark)))))
1887
1888(defun gnus-group-mark-buffer (&optional unmark)
1889  "Mark all groups in the buffer.
1890If UNMARK, remove the mark instead."
1891  (interactive "P")
1892  (gnus-group-mark-region unmark (point-min) (point-max)))
1893
1894(defun gnus-group-mark-regexp (regexp)
1895  "Mark all groups that match some regexp."
1896  (interactive "sMark (regexp): ")
1897  (let ((alist (cdr gnus-newsrc-alist))
1898	group)
1899    (save-excursion
1900      (while alist
1901	(when (string-match regexp (setq group (gnus-info-group (pop alist))))
1902	  (gnus-group-jump-to-group group)
1903	  (gnus-group-set-mark group)))))
1904  (gnus-group-position-point))
1905
1906(defun gnus-group-remove-mark (group &optional test-marked)
1907  "Remove the process mark from GROUP and move point there.
1908Return nil if the group isn't displayed."
1909  (if (gnus-group-goto-group group nil test-marked)
1910      (save-excursion
1911	(gnus-group-mark-group 1 'unmark t)
1912	t)
1913    (setq gnus-group-marked
1914	  (delete group gnus-group-marked))
1915    nil))
1916
1917(defun gnus-group-set-mark (group)
1918  "Set the process mark on GROUP."
1919  (if (gnus-group-goto-group group)
1920      (save-excursion
1921	(gnus-group-mark-group 1 nil t))
1922    (setq gnus-group-marked (cons group (delete group gnus-group-marked)))))
1923
1924(defun gnus-group-universal-argument (arg &optional groups func)
1925  "Perform any command on all groups according to the process/prefix convention."
1926  (interactive "P")
1927  (if (eq (setq func (or func
1928			 (key-binding
1929			  (read-key-sequence
1930			   (substitute-command-keys
1931			    "\\<gnus-group-mode-map>\\[gnus-group-universal-argument]")))))
1932	  'undefined)
1933      (gnus-error 1 "Undefined key")
1934    (gnus-group-iterate arg
1935      (lambda (group)
1936	(command-execute func))))
1937  (gnus-group-position-point))
1938
1939(defun gnus-group-process-prefix (n)
1940  "Return a list of groups to work on.
1941Take into consideration N (the prefix) and the list of marked groups."
1942  (cond
1943   (n
1944    (setq n (prefix-numeric-value n))
1945    ;; There is a prefix, so we return a list of the N next
1946    ;; groups.
1947    (let ((way (if (< n 0) -1 1))
1948	  (n (abs n))
1949	  group groups)
1950      (save-excursion
1951	(while (> n 0)
1952	  (if (setq group (gnus-group-group-name))
1953	      (push group groups))
1954	  (setq n (1- n))
1955	  (gnus-group-next-group way)))
1956      (nreverse groups)))
1957   ((and (gnus-region-active-p) (mark))
1958    ;; Work on the region between point and mark.
1959    (let ((max (max (point) (mark)))
1960	  groups)
1961      (save-excursion
1962	(goto-char (min (point) (mark)))
1963	(while
1964	    (and
1965	     (push (gnus-group-group-name) groups)
1966	     (zerop (gnus-group-next-group 1))
1967	     (< (point) max)))
1968	(nreverse groups))))
1969   (gnus-group-marked
1970    ;; No prefix, but a list of marked articles.
1971    (reverse gnus-group-marked))
1972   (t
1973    ;; Neither marked articles or a prefix, so we return the
1974    ;; current group.
1975    (let ((group (gnus-group-group-name)))
1976      (and group (list group))))))
1977
1978;;; !!!Surely gnus-group-iterate should be a macro instead?  I can't
1979;;; imagine why I went through these contortions...
1980(eval-and-compile
1981  (let ((function (make-symbol "gnus-group-iterate-function"))
1982	(window (make-symbol "gnus-group-iterate-window"))
1983	(groups (make-symbol "gnus-group-iterate-groups"))
1984	(group (make-symbol "gnus-group-iterate-group")))
1985    (eval
1986     `(defun gnus-group-iterate (arg ,function)
1987	"Iterate FUNCTION over all process/prefixed groups.
1988FUNCTION will be called with the group name as the parameter
1989and with point over the group in question."
1990	(let ((,groups (gnus-group-process-prefix arg))
1991	      (,window (selected-window))
1992	      ,group)
1993	  (while ,groups
1994	    (setq ,group (car ,groups)
1995		  ,groups (cdr ,groups))
1996	    (select-window ,window)
1997	    (gnus-group-remove-mark ,group)
1998	    (save-selected-window
1999	      (save-excursion
2000		(funcall ,function ,group)))))))))
2001
2002(put 'gnus-group-iterate 'lisp-indent-function 1)
2003
2004;; Selecting groups.
2005
2006(defun gnus-group-read-group (&optional all no-article group select-articles)
2007  "Read news in this newsgroup.
2008If the prefix argument ALL is non-nil, already read articles become
2009readable.  IF ALL is a number, fetch this number of articles.  If the
2010optional argument NO-ARTICLE is non-nil, no article will be
2011auto-selected upon group entry.  If GROUP is non-nil, fetch that
2012group."
2013  (interactive "P")
2014  (let ((no-display (eq all 0))
2015	(group (or group (gnus-group-group-name)))
2016	number active marked entry)
2017    (when (eq all 0)
2018      (setq all nil))
2019    (unless group
2020      (error "No group on current line"))
2021    (setq marked (gnus-info-marks
2022		  (nth 2 (setq entry (gnus-gethash
2023				      group gnus-newsrc-hashtb)))))
2024    ;; This group might be a dead group.  In that case we have to get
2025    ;; the number of unread articles from `gnus-active-hashtb'.
2026    (setq number
2027	  (cond ((numberp all) all)
2028		(entry (car entry))
2029		((setq active (gnus-active group))
2030		 (- (1+ (cdr active)) (car active)))))
2031    (gnus-summary-read-group
2032     group (or all (and (numberp number)
2033			(zerop (+ number (gnus-range-length
2034					  (cdr (assq 'tick marked)))
2035				  (gnus-range-length
2036				   (cdr (assq 'dormant marked)))))))
2037     no-article nil no-display nil select-articles)))
2038
2039(defun gnus-group-select-group (&optional all)
2040  "Select this newsgroup.
2041No article is selected automatically.
2042If the group is opened, just switch the summary buffer.
2043If ALL is non-nil, already read articles become readable.
2044If ALL is a positive number, fetch this number of the latest
2045articles in the group.
2046If ALL is a negative number, fetch this number of the earliest
2047articles in the group."
2048  (interactive "P")
2049  (when (and (eobp) (not (gnus-group-group-name)))
2050    (forward-line -1))
2051  (gnus-group-read-group all t))
2052
2053(defun gnus-group-quick-select-group (&optional all)
2054  "Select the current group \"quickly\".
2055This means that no highlighting or scoring will be performed.
2056If ALL (the prefix argument) is 0, don't even generate the summary
2057buffer.
2058
2059This might be useful if you want to toggle threading
2060before entering the group."
2061  (interactive "P")
2062  (require 'gnus-score)
2063  (let (gnus-visual
2064	gnus-score-find-score-files-function
2065	gnus-home-score-file
2066	gnus-apply-kill-hook
2067	gnus-summary-expunge-below)
2068    (gnus-group-read-group all t)))
2069
2070(defun gnus-group-visible-select-group (&optional all)
2071  "Select the current group without hiding any articles."
2072  (interactive "P")
2073  (let ((gnus-inhibit-limiting t))
2074    (gnus-group-read-group all t)))
2075
2076(defun gnus-group-select-group-ephemerally ()
2077  "Select the current group without doing any processing whatsoever.
2078You will actually be entered into a group that's a copy of
2079the current group; no changes you make while in this group will
2080be permanent."
2081  (interactive)
2082  (require 'gnus-score)
2083  (let* (gnus-visual
2084	 gnus-score-find-score-files-function gnus-apply-kill-hook
2085	 gnus-summary-expunge-below gnus-show-threads gnus-suppress-duplicates
2086	 gnus-summary-mode-hook gnus-select-group-hook
2087	 (group (gnus-group-group-name))
2088	 (method (gnus-find-method-for-group group)))
2089    (gnus-group-read-ephemeral-group
2090     (gnus-group-prefixed-name group method) method)))
2091
2092;;;###autoload
2093(defun gnus-fetch-group (group &optional articles)
2094  "Start Gnus if necessary and enter GROUP.
2095Returns whether the fetching was successful or not."
2096  (interactive (list (completing-read "Group name: " gnus-active-hashtb)))
2097  (unless (get-buffer gnus-group-buffer)
2098    (gnus-no-server))
2099  (gnus-group-read-group articles nil group))
2100
2101;;;###autoload
2102(defun gnus-fetch-group-other-frame (group)
2103  "Pop up a frame and enter GROUP."
2104  (interactive "P")
2105  (let ((window (get-buffer-window gnus-group-buffer)))
2106    (cond (window
2107	   (select-frame (window-frame window)))
2108	  ((= (length (frame-list)) 1)
2109	   (select-frame (make-frame)))
2110	  (t
2111	   (other-frame 1))))
2112  (gnus-fetch-group group))
2113
2114(defvar gnus-ephemeral-group-server 0)
2115
2116(defcustom gnus-large-ephemeral-newsgroup 200
2117  "The number of articles which indicates a large ephemeral newsgroup.
2118Same as `gnus-large-newsgroup', but only used for ephemeral newsgroups.
2119
2120If the number of articles in a newsgroup is greater than this value,
2121confirmation is required for selecting the newsgroup.  If it is nil, no
2122confirmation is required."
2123  :version "22.1"
2124  :group 'gnus-group-select
2125  :type '(choice (const :tag "No limit" nil)
2126		 integer))
2127
2128(defcustom gnus-fetch-old-ephemeral-headers nil
2129  "Same as `gnus-fetch-old-headers', but only used for ephemeral newsgroups."
2130  :version "22.1"
2131  :group 'gnus-thread
2132  :type '(choice (const :tag "off" nil)
2133		 (const some)
2134		 number
2135		 (sexp :menu-tag "other" t)))
2136
2137;; Enter a group that is not in the group buffer.  Non-nil is returned
2138;; if selection was successful.
2139(defun gnus-group-read-ephemeral-group (group method &optional activate
2140					      quit-config request-only
2141					      select-articles
2142					      parameters
2143					      number)
2144  "Read GROUP from METHOD as an ephemeral group.
2145If ACTIVATE, request the group first.
2146If QUIT-CONFIG, use that window configuration when exiting from the
2147ephemeral group.
2148If REQUEST-ONLY, don't actually read the group; just request it.
2149If SELECT-ARTICLES, only select those articles.
2150If PARAMETERS, use those as the group parameters.
2151If NUMBER, fetch this number of articles.
2152
2153Return the name of the group if selection was successful."
2154  (interactive
2155   (list
2156    ;; (gnus-read-group "Group name: ")
2157    (completing-read
2158     "Group: " gnus-active-hashtb
2159     nil nil nil
2160     'gnus-group-history)
2161    (gnus-read-method "From method: ")))
2162  ;; Transform the select method into a unique server.
2163  (when (stringp method)
2164    (setq method (gnus-server-to-method method)))
2165  (setq method
2166	`(,(car method) ,(concat (cadr method) "-ephemeral")
2167	  (,(intern (format "%s-address" (car method))) ,(cadr method))
2168	  ,@(cddr method)))
2169  (let ((group (if (gnus-group-foreign-p group) group
2170		 (gnus-group-prefixed-name (gnus-group-real-name group)
2171					   method))))
2172    (gnus-sethash
2173     group
2174     `(-1 nil (,group
2175	       ,gnus-level-default-subscribed nil nil ,method
2176	       ,(cons
2177		 (if quit-config
2178		     (cons 'quit-config quit-config)
2179		   (cons 'quit-config
2180			 (cons gnus-summary-buffer
2181			       gnus-current-window-configuration)))
2182		 parameters)))
2183     gnus-newsrc-hashtb)
2184    (push method gnus-ephemeral-servers)
2185    (set-buffer gnus-group-buffer)
2186    (unless (gnus-check-server method)
2187      (error "Unable to contact server: %s" (gnus-status-message method)))
2188    (when activate
2189      (gnus-activate-group group 'scan)
2190      (unless (gnus-request-group group)
2191	(error "Couldn't request group: %s"
2192	       (nnheader-get-report (car method)))))
2193    (if request-only
2194	group
2195      (condition-case ()
2196	  (when (let ((gnus-large-newsgroup gnus-large-ephemeral-newsgroup)
2197		      (gnus-fetch-old-headers
2198		       gnus-fetch-old-ephemeral-headers))
2199		  (gnus-group-read-group (or number t) t group select-articles))
2200	    group)
2201	;;(error nil)
2202	(quit
2203	 (message "Quit reading the ephemeral group")
2204	 nil)))))
2205
2206(defun gnus-group-jump-to-group (group)
2207  "Jump to newsgroup GROUP."
2208  (interactive
2209   (list (mm-string-make-unibyte
2210	  (completing-read
2211	   "Group: " gnus-active-hashtb nil
2212	   (gnus-read-active-file-p)
2213	   gnus-group-jump-to-group-prompt
2214	   'gnus-group-history))))
2215
2216  (when (equal group "")
2217    (error "Empty group name"))
2218
2219  (unless (gnus-ephemeral-group-p group)
2220    ;; Either go to the line in the group buffer...
2221    (unless (gnus-group-goto-group group)
2222      ;; ... or insert the line.
2223      (gnus-group-update-group group)
2224      (gnus-group-goto-group group)))
2225  ;; Adjust cursor point.
2226  (gnus-group-position-point))
2227
2228(defun gnus-group-goto-group (group &optional far test-marked)
2229  "Goto to newsgroup GROUP.
2230If FAR, it is likely that the group is not on the current line.
2231If TEST-MARKED, the line must be marked."
2232  (when group
2233    (beginning-of-line)
2234    (cond
2235     ;; It's quite likely that we are on the right line, so
2236     ;; we check the current line first.
2237     ((and (not far)
2238	   (eq (get-text-property (point) 'gnus-group)
2239	       (gnus-intern-safe group gnus-active-hashtb))
2240	   (or (not test-marked) (gnus-group-mark-line-p)))
2241      (point))
2242     ;; Previous and next line are also likely, so we check them as well.
2243     ((and (not far)
2244	   (save-excursion
2245	     (forward-line -1)
2246	     (and (eq (get-text-property (point) 'gnus-group)
2247		      (gnus-intern-safe group gnus-active-hashtb))
2248		  (or (not test-marked) (gnus-group-mark-line-p)))))
2249      (forward-line -1)
2250      (point))
2251     ((and (not far)
2252	   (save-excursion
2253	     (forward-line 1)
2254	     (and (eq (get-text-property (point) 'gnus-group)
2255		      (gnus-intern-safe group gnus-active-hashtb))
2256		  (or (not test-marked) (gnus-group-mark-line-p)))))
2257      (forward-line 1)
2258      (point))
2259     (test-marked
2260      (goto-char (point-min))
2261      (let (found)
2262	(while (and (not found)
2263		    (gnus-goto-char
2264		     (text-property-any
2265		      (point) (point-max)
2266		      'gnus-group
2267		      (gnus-intern-safe group gnus-active-hashtb))))
2268	  (if (gnus-group-mark-line-p)
2269	      (setq found t)
2270	    (forward-line 1)))
2271	found))
2272     (t
2273      ;; Search through the entire buffer.
2274      (gnus-goto-char
2275       (text-property-any
2276	(point-min) (point-max)
2277	'gnus-group (gnus-intern-safe group gnus-active-hashtb)))))))
2278
2279(defun gnus-group-next-group (n &optional silent)
2280  "Go to next N'th newsgroup.
2281If N is negative, search backward instead.
2282Returns the difference between N and the number of skips actually
2283done."
2284  (interactive "p")
2285  (gnus-group-next-unread-group n t nil silent))
2286
2287(defun gnus-group-next-unread-group (n &optional all level silent)
2288  "Go to next N'th unread newsgroup.
2289If N is negative, search backward instead.
2290If ALL is non-nil, choose any newsgroup, unread or not.
2291If LEVEL is non-nil, choose the next group with level LEVEL, or, if no
2292such group can be found, the next group with a level higher than
2293LEVEL.
2294Returns the difference between N and the number of skips actually
2295made."
2296  (interactive "p")
2297  (let ((backward (< n 0))
2298	(n (abs n)))
2299    (while (and (> n 0)
2300		(gnus-group-search-forward
2301		 backward (or (not gnus-group-goto-unread) all) level))
2302      (setq n (1- n)))
2303    (when (and (/= 0 n)
2304	       (not silent))
2305      (gnus-message 7 "No more%s newsgroups%s" (if all "" " unread")
2306		    (if level " on this level or higher" "")))
2307    n))
2308
2309(defun gnus-group-prev-group (n)
2310  "Go to previous N'th newsgroup.
2311Returns the difference between N and the number of skips actually
2312done."
2313  (interactive "p")
2314  (gnus-group-next-unread-group (- n) t))
2315
2316(defun gnus-group-prev-unread-group (n)
2317  "Go to previous N'th unread newsgroup.
2318Returns the difference between N and the number of skips actually
2319done."
2320  (interactive "p")
2321  (gnus-group-next-unread-group (- n)))
2322
2323(defun gnus-group-next-unread-group-same-level (n)
2324  "Go to next N'th unread newsgroup on the same level.
2325If N is negative, search backward instead.
2326Returns the difference between N and the number of skips actually
2327done."
2328  (interactive "p")
2329  (gnus-group-next-unread-group n t (gnus-group-group-level))
2330  (gnus-group-position-point))
2331
2332(defun gnus-group-prev-unread-group-same-level (n)
2333  "Go to next N'th unread newsgroup on the same level.
2334Returns the difference between N and the number of skips actually
2335done."
2336  (interactive "p")
2337  (gnus-group-next-unread-group (- n) t (gnus-group-group-level))
2338  (gnus-group-position-point))
2339
2340(defun gnus-group-best-unread-group (&optional exclude-group)
2341  "Go to the group with the highest level.
2342If EXCLUDE-GROUP, do not go to that group."
2343  (interactive)
2344  (goto-char (point-min))
2345  (let ((best 100000)
2346	unread best-point)
2347    (while (not (eobp))
2348      (setq unread (get-text-property (point) 'gnus-unread))
2349      (when (and (numberp unread) (> unread 0))
2350	(when (and (get-text-property (point) 'gnus-level)
2351		   (< (get-text-property (point) 'gnus-level) best)
2352		   (or (not exclude-group)
2353		       (not (equal exclude-group (gnus-group-group-name)))))
2354	  (setq best (get-text-property (point) 'gnus-level))
2355	  (setq best-point (point))))
2356      (forward-line 1))
2357    (when best-point
2358      (goto-char best-point))
2359    (gnus-group-position-point)
2360    (and best-point (gnus-group-group-name))))
2361
2362(defun gnus-group-first-unread-group ()
2363  "Go to the first group with unread articles."
2364  (interactive)
2365  (prog1
2366      (let ((opoint (point))
2367	    unread)
2368	(goto-char (point-min))
2369	(if (or (eq (setq unread (gnus-group-group-unread)) t) ; Not active.
2370		(and (numberp unread)	; Not a topic.
2371		     (not (zerop unread))) ; Has unread articles.
2372		(zerop (gnus-group-next-unread-group 1))) ; Next unread group.
2373	    (point)			; Success.
2374	  (goto-char opoint)
2375	  nil))				; Not success.
2376    (gnus-group-position-point)))
2377
2378(defun gnus-group-enter-server-mode ()
2379  "Jump to the server buffer."
2380  (interactive)
2381  (gnus-enter-server-buffer))
2382
2383(defun gnus-group-make-group (name &optional method address args)
2384  "Add a new newsgroup.
2385The user will be prompted for a NAME, for a select METHOD, and an
2386ADDRESS."
2387  (interactive
2388   (list
2389    (gnus-read-group "Group name: ")
2390    (gnus-read-method "From method: ")))
2391
2392  (when (stringp method)
2393    (setq method (or (gnus-server-to-method method) method)))
2394  (let* ((meth (gnus-method-simplify
2395		(when (and method
2396			   (not (gnus-server-equal method gnus-select-method)))
2397		  (if address (list (intern method) address)
2398		    method))))
2399	 (nname (if method (gnus-group-prefixed-name name meth) name))
2400	 backend info)
2401    (when (gnus-gethash nname gnus-newsrc-hashtb)
2402      (error "Group %s already exists" (gnus-group-decoded-name nname)))
2403    ;; Subscribe to the new group.
2404    (gnus-group-change-level
2405     (setq info (list t nname gnus-level-default-subscribed nil nil meth))
2406     gnus-level-default-subscribed gnus-level-killed
2407     (and (gnus-group-group-name)
2408	  (gnus-gethash (gnus-group-group-name)
2409			gnus-newsrc-hashtb))
2410     t)
2411    ;; Make it active.
2412    (gnus-set-active nname (cons 1 0))
2413    (unless (gnus-ephemeral-group-p name)
2414      (gnus-dribble-enter
2415       (concat "(gnus-group-set-info '"
2416	       (gnus-prin1-to-string (cdr info)) ")")))
2417    ;; Insert the line.
2418    (gnus-group-insert-group-line-info nname)
2419    (forward-line -1)
2420    (gnus-group-position-point)
2421
2422    ;; Load the back end and try to make the back end create
2423    ;; the group as well.
2424    (when (assoc (symbol-name (setq backend (car (gnus-server-get-method
2425						  nil meth))))
2426		 gnus-valid-select-methods)
2427      (require backend))
2428    (gnus-check-server meth)
2429    (when (gnus-check-backend-function 'request-create-group nname)
2430      (unless (gnus-request-create-group nname nil args)
2431	(error "Could not create group on server: %s"
2432	       (nnheader-get-report backend))))
2433    t))
2434
2435(defun gnus-group-delete-groups (&optional arg)
2436  "Delete the current group.  Only meaningful with editable groups."
2437  (interactive "P")
2438  (let ((n (length (gnus-group-process-prefix arg))))
2439    (when (gnus-yes-or-no-p
2440	   (if (= n 1)
2441	       "Delete this 1 group? "
2442	     (format "Delete these %d groups? " n)))
2443      (gnus-group-iterate arg
2444	(lambda (group)
2445	  (gnus-group-delete-group group nil t))))))
2446
2447(defun gnus-group-delete-group (group &optional force no-prompt)
2448  "Delete the current group.  Only meaningful with editable groups.
2449If FORCE (the prefix) is non-nil, all the articles in the group will
2450be deleted.  This is \"deleted\" as in \"removed forever from the face
2451of the Earth\".  There is no undo.  The user will be prompted before
2452doing the deletion.
2453Note that you also have to specify FORCE if you want the group to
2454be removed from the server, even when it's empty."
2455  (interactive
2456   (list (gnus-group-group-name)
2457	 current-prefix-arg))
2458  (unless group
2459    (error "No group to delete"))
2460  (unless (gnus-check-backend-function 'request-delete-group group)
2461    (error "This back end does not support group deletion"))
2462  (prog1
2463      (let ((group-decoded (gnus-group-decoded-name group)))
2464	(if (and (not no-prompt)
2465		 (not (gnus-yes-or-no-p
2466		       (format
2467			"Do you really want to delete %s%s? "
2468			group-decoded (if force " and all its contents" "")))))
2469	    ()				; Whew!
2470	  (gnus-message 6 "Deleting group %s..." group-decoded)
2471	  (if (not (gnus-request-delete-group group force))
2472	      (gnus-error 3 "Couldn't delete group %s" group-decoded)
2473	    (gnus-message 6 "Deleting group %s...done" group-decoded)
2474	    (gnus-group-goto-group group)
2475	    (gnus-group-kill-group 1 t)
2476	    (gnus-sethash group nil gnus-active-hashtb)
2477	    t)))
2478    (gnus-group-position-point)))
2479
2480(defun gnus-group-rename-group (group new-name)
2481  "Rename group from GROUP to NEW-NAME.
2482When used interactively, GROUP is the group under point
2483and NEW-NAME will be prompted for."
2484  (interactive
2485   (list
2486    (gnus-group-group-name)
2487    (progn
2488      (unless (gnus-check-backend-function
2489	       'request-rename-group (gnus-group-group-name))
2490	(error "This back end does not support renaming groups"))
2491      (gnus-read-group "Rename group to: "
2492		       (gnus-group-real-name (gnus-group-group-name))))))
2493
2494  (unless (gnus-check-backend-function 'request-rename-group group)
2495    (error "This back end does not support renaming groups"))
2496  (unless group
2497    (error "No group to rename"))
2498  (when (equal (gnus-group-real-name group) new-name)
2499    (error "Can't rename to the same name"))
2500
2501  ;; We find the proper prefixed name.
2502  (setq new-name
2503	(if (gnus-group-native-p group)
2504	    ;; Native group.
2505	    new-name
2506	  ;; Foreign group.
2507	  (gnus-group-prefixed-name
2508	   (gnus-group-real-name new-name)
2509	   (gnus-info-method (gnus-get-info group)))))
2510
2511  (when (gnus-active new-name)
2512    (error "The group %s already exists" new-name))
2513
2514  (gnus-message 6 "Renaming group %s to %s..." group new-name)
2515  (prog1
2516      (if (progn
2517	    (gnus-group-goto-group group)
2518	    (not (when (< (gnus-group-group-level) gnus-level-zombie)
2519		   (gnus-request-rename-group group new-name))))
2520	  (gnus-error 3 "Couldn't rename group %s to %s" group new-name)
2521	;; We rename the group internally by killing it...
2522	(gnus-group-kill-group)
2523	;; ... changing its name ...
2524	(setcar (cdar gnus-list-of-killed-groups) new-name)
2525	;; ... and then yanking it.  Magic!
2526	(gnus-group-yank-group)
2527	(gnus-set-active new-name (gnus-active group))
2528	(gnus-message 6 "Renaming group %s to %s...done" group new-name)
2529	new-name)
2530    (setq gnus-killed-list (delete group gnus-killed-list))
2531    (gnus-set-active group nil)
2532    (gnus-dribble-touch)
2533    (gnus-group-position-point)))
2534
2535(defun gnus-group-edit-group (group &optional part)
2536  "Edit the group on the current line."
2537  (interactive (list (gnus-group-group-name)))
2538  (let ((part (or part 'info))
2539	info)
2540    (unless group
2541      (error "No group on current line"))
2542    (unless (setq info (gnus-get-info group))
2543      (error "Killed group; can't be edited"))
2544    (ignore-errors
2545      (gnus-close-group group))
2546    (gnus-edit-form
2547     ;; Find the proper form to edit.
2548     (cond ((eq part 'method)
2549	    (or (gnus-info-method info) "native"))
2550	   ((eq part 'params)
2551	    (gnus-info-params info))
2552	   (t info))
2553     ;; The proper documentation.
2554     (format
2555      "Editing the %s for `%s'."
2556      (cond
2557       ((eq part 'method) "select method")
2558       ((eq part 'params) "group parameters")
2559       (t "group info"))
2560      (gnus-group-decoded-name group))
2561     `(lambda (form)
2562	(gnus-group-edit-group-done ',part ,group form)))
2563    (local-set-key
2564     "\C-c\C-i"
2565     (gnus-create-info-command
2566      (cond
2567       ((eq part 'method)
2568	"(gnus)Select Methods")
2569       ((eq part 'params)
2570	"(gnus)Group Parameters")
2571       (t
2572	"(gnus)Group Info"))))))
2573
2574(defun gnus-group-edit-group-method (group)
2575  "Edit the select method of GROUP."
2576  (interactive (list (gnus-group-group-name)))
2577  (gnus-group-edit-group group 'method))
2578
2579(defun gnus-group-edit-group-parameters (group)
2580  "Edit the group parameters of GROUP."
2581  (interactive (list (gnus-group-group-name)))
2582  (gnus-group-edit-group group 'params))
2583
2584(defun gnus-group-edit-group-done (part group form)
2585  "Update variables."
2586  (let* ((method (cond ((eq part 'info) (nth 4 form))
2587		       ((eq part 'method) form)
2588		       (t nil)))
2589	 (info (cond ((eq part 'info) form)
2590		     ((eq part 'method) (gnus-get-info group))
2591		     (t nil)))
2592	 (new-group (if info
2593			(if (or (not method)
2594				(gnus-server-equal
2595				 gnus-select-method method))
2596			    (gnus-group-real-name (car info))
2597			  (gnus-group-prefixed-name
2598			   (gnus-group-real-name (car info)) method))
2599		      nil)))
2600    (when (and new-group
2601	       (not (equal new-group group)))
2602      (when (gnus-group-goto-group group)
2603	(gnus-group-kill-group 1))
2604      (gnus-activate-group new-group))
2605    ;; Set the info.
2606    (if (not (and info new-group))
2607	(gnus-group-set-info form (or new-group group) part)
2608      (setq info (gnus-copy-sequence info))
2609      (setcar info new-group)
2610      (unless (gnus-server-equal method "native")
2611	(unless (nthcdr 3 info)
2612	  (nconc info (list nil nil)))
2613	(unless (nthcdr 4 info)
2614	  (nconc info (list nil)))
2615	(gnus-info-set-method info method))
2616      (gnus-group-set-info info))
2617    (gnus-group-update-group (or new-group group))
2618    (gnus-group-position-point)))
2619
2620(defun gnus-group-make-useful-group (group method)
2621  "Create one of the groups described in `gnus-useful-groups'."
2622  (interactive
2623   (let ((entry (assoc (completing-read "Create group: " gnus-useful-groups
2624					nil t)
2625		       gnus-useful-groups)))
2626     (list (cadr entry) (caddr entry))))
2627  (setq method (gnus-copy-sequence method))
2628  (let (entry)
2629    (while (setq entry (memq (assq 'eval method) method))
2630      (setcar entry (eval (cadar entry)))))
2631  (gnus-group-make-group group method))
2632
2633(defun gnus-group-make-help-group (&optional noerror)
2634  "Create the Gnus documentation group.
2635Optional argument NOERROR modifies the behavior of this function when the
2636group already exists:
2637- if not given, and error is signaled,
2638- if t, stay silent,
2639- if anything else, just print a message."
2640  (interactive)
2641  (let ((name (gnus-group-prefixed-name "gnus-help" '(nndoc "gnus-help")))
2642	(file (nnheader-find-etc-directory "gnus-tut.txt" t)))
2643    (if (gnus-gethash name gnus-newsrc-hashtb)
2644	(cond ((eq noerror nil)
2645	       (error "Documentation group already exists"))
2646	      ((eq noerror t)
2647	       ;; stay silent
2648	       )
2649	      (t
2650	       (gnus-message 1 "Documentation group already exists")))
2651      ;; else:
2652      (if (not file)
2653	  (gnus-message 1 "Couldn't find doc group")
2654	(gnus-group-make-group
2655	 (gnus-group-real-name name)
2656	 (list 'nndoc "gnus-help"
2657	       (list 'nndoc-address file)
2658	       (list 'nndoc-article-type 'mbox))))
2659      ))
2660  (gnus-group-position-point))
2661
2662(defun gnus-group-make-doc-group (file type)
2663  "Create a group that uses a single file as the source.
2664
2665If called with a prefix argument, ask for the file type."
2666  (interactive
2667   (list (read-file-name "File name: ")
2668	 (and current-prefix-arg 'ask)))
2669  (when (eq type 'ask)
2670    (let ((err "")
2671	  char found)
2672      (while (not found)
2673	(message
2674	 "%sFile type (mbox, babyl, digest, forward, mmdf, guess) [m, b, d, f, a, g]: "
2675	 err)
2676	(setq found (cond ((= (setq char (read-char)) ?m) 'mbox)
2677			  ((= char ?b) 'babyl)
2678			  ((= char ?d) 'digest)
2679			  ((= char ?f) 'forward)
2680			  ((= char ?a) 'mmfd)
2681			  ((= char ?g) 'guess)
2682			  (t (setq err (format "%c unknown. " char))
2683			     nil))))
2684      (setq type found)))
2685  (setq file (expand-file-name file))
2686  (let ((name (gnus-generate-new-group-name
2687	       (gnus-group-prefixed-name
2688		(file-name-nondirectory file) '(nndoc ""))))
2689	(encodable (mm-coding-system-p 'utf-8)))
2690    (gnus-group-make-group
2691     (if encodable
2692	 (mm-encode-coding-string (gnus-group-real-name name) 'utf-8)
2693       (gnus-group-real-name name))
2694     (list 'nndoc (if encodable
2695		      (mm-encode-coding-string file 'utf-8)
2696		    file)
2697	   (list 'nndoc-address file)
2698	   (list 'nndoc-article-type (or type 'guess))))))
2699
2700(defvar nnweb-type-definition)
2701(defvar gnus-group-web-type-history nil)
2702(defvar gnus-group-web-search-history nil)
2703(defun gnus-group-make-web-group (&optional solid)
2704  "Create an ephemeral nnweb group.
2705If SOLID (the prefix), create a solid group."
2706  (interactive "P")
2707  (require 'nnweb)
2708  (let* ((group
2709	  (if solid (gnus-read-group "Group name: ")
2710	    (message-unique-id)))
2711	 (default-type (or (car gnus-group-web-type-history)
2712			   (symbol-name (caar nnweb-type-definition))))
2713	 (type
2714	  (gnus-string-or
2715	   (completing-read
2716	    (format "Search engine type (default %s): " default-type)
2717	    (mapcar (lambda (elem) (list (symbol-name (car elem))))
2718		    nnweb-type-definition)
2719	    nil t nil 'gnus-group-web-type-history)
2720	   default-type))
2721	 (search
2722	  (read-string
2723	   "Search string: "
2724	   (cons (or (car gnus-group-web-search-history) "") 0)
2725	   'gnus-group-web-search-history))
2726	 (method
2727	  `(nnweb ,group (nnweb-search ,search)
2728		  (nnweb-type ,(intern type))
2729		  (nnweb-ephemeral-p t))))
2730    (if solid
2731	(progn
2732	  (gnus-pull 'nnweb-ephemeral-p method)
2733	  (gnus-group-make-group group method))
2734      (gnus-group-read-ephemeral-group
2735       group method t
2736       (cons (current-buffer)
2737	     (if (eq major-mode 'gnus-summary-mode) 'summary 'group))))))
2738
2739(eval-when-compile
2740  (defvar nnrss-group-alist)
2741  (defun nnrss-discover-feed (arg))
2742  (defun nnrss-save-server-data (arg)))
2743(defun gnus-group-make-rss-group (&optional url)
2744  "Given a URL, discover if there is an RSS feed.
2745If there is, use Gnus to create an nnrss group"
2746  (interactive)
2747  (require 'nnrss)
2748  (if (not url)
2749      (setq url (read-from-minibuffer "URL to Search for RSS: ")))
2750  (let ((feedinfo (nnrss-discover-feed url)))
2751    (if feedinfo
2752	(let ((title (gnus-newsgroup-savable-name
2753		      (read-from-minibuffer "Title: "
2754					    (gnus-newsgroup-savable-name
2755					     (or (cdr (assoc 'title
2756							     feedinfo))
2757						 "")))))
2758	      (desc  (read-from-minibuffer "Description: "
2759					   (cdr (assoc 'description
2760						       feedinfo))))
2761	      (href (cdr (assoc 'href feedinfo)))
2762	      (encodable (mm-coding-system-p 'utf-8)))
2763	  (when encodable
2764	    ;; Unify non-ASCII text.
2765	    (setq title (mm-decode-coding-string
2766			 (mm-encode-coding-string title 'utf-8) 'utf-8)))
2767	  (gnus-group-make-group (if encodable
2768				     (mm-encode-coding-string title 'utf-8)
2769				   title)
2770				 '(nnrss ""))
2771	  (push (list title href desc) nnrss-group-alist)
2772	  (nnrss-save-server-data nil))
2773      (error "No feeds found for %s" url))))
2774
2775(defvar nnwarchive-type-definition)
2776(defvar gnus-group-warchive-type-history nil)
2777(defvar gnus-group-warchive-login-history nil)
2778(defvar gnus-group-warchive-address-history nil)
2779
2780(defun gnus-group-make-warchive-group ()
2781  "Create a nnwarchive group."
2782  (interactive)
2783  (require 'nnwarchive)
2784  (let* ((group (gnus-read-group "Group name: "))
2785	 (default-type (or (car gnus-group-warchive-type-history)
2786			   (symbol-name (caar nnwarchive-type-definition))))
2787	 (type
2788	  (gnus-string-or
2789	   (completing-read
2790	    (format "Warchive type (default %s): " default-type)
2791	    (mapcar (lambda (elem) (list (symbol-name (car elem))))
2792		    nnwarchive-type-definition)
2793	    nil t nil 'gnus-group-warchive-type-history)
2794	   default-type))
2795	 (address (read-string "Warchive address: "
2796			       nil 'gnus-group-warchive-address-history))
2797	 (default-login (or (car gnus-group-warchive-login-history)
2798			    user-mail-address))
2799	 (login
2800	  (gnus-string-or
2801	   (read-string
2802	    (format "Warchive login (default %s): " user-mail-address)
2803	    default-login 'gnus-group-warchive-login-history)
2804	   user-mail-address))
2805	 (method
2806	  `(nnwarchive ,address
2807		       (nnwarchive-type ,(intern type))
2808		       (nnwarchive-login ,login))))
2809    (gnus-group-make-group group method)))
2810
2811(defun gnus-group-make-archive-group (&optional all)
2812  "Create the (ding) Gnus archive group of the most recent articles.
2813Given a prefix, create a full group."
2814  (interactive "P")
2815  (let ((group (gnus-group-prefixed-name
2816		(if all "ding.archives" "ding.recent") '(nndir ""))))
2817    (when (gnus-gethash group gnus-newsrc-hashtb)
2818      (error "Archive group already exists"))
2819    (gnus-group-make-group
2820     (gnus-group-real-name group)
2821     (list 'nndir (if all "hpc" "edu")
2822	   (list 'nndir-directory
2823		 (if all gnus-group-archive-directory
2824		   gnus-group-recent-archive-directory))))
2825    (gnus-group-add-parameter group (cons 'to-address "ding@gnus.org"))))
2826
2827(defun gnus-group-make-directory-group (dir)
2828  "Create an nndir group.
2829The user will be prompted for a directory.  The contents of this
2830directory will be used as a newsgroup.  The directory should contain
2831mail messages or news articles in files that have numeric names."
2832  (interactive
2833   (list (read-file-name "Create group from directory: ")))
2834  (unless (file-exists-p dir)
2835    (error "No such directory"))
2836  (unless (file-directory-p dir)
2837    (error "Not a directory"))
2838  (let ((ext "")
2839	(i 0)
2840	group)
2841    (while (or (not group) (gnus-gethash group gnus-newsrc-hashtb))
2842      (setq group
2843	    (gnus-group-prefixed-name
2844	     (expand-file-name ext dir)
2845	     '(nndir "")))
2846      (setq ext (format "<%d>" (setq i (1+ i)))))
2847    (gnus-group-make-group
2848     (gnus-group-real-name group)
2849     (list 'nndir (gnus-group-real-name group) (list 'nndir-directory dir)))))
2850
2851(defvar nnkiboze-score-file)
2852(defun gnus-group-make-kiboze-group (group address scores)
2853  "Create an nnkiboze group.
2854The user will be prompted for a name, a regexp to match groups, and
2855score file entries for articles to include in the group."
2856  (interactive
2857   (list
2858    (read-string "nnkiboze group name: ")
2859    (read-string "Source groups (regexp): ")
2860    (let ((headers (mapcar (lambda (group) (list group))
2861			   '("subject" "from" "number" "date" "message-id"
2862			     "references" "chars" "lines" "xref"
2863			     "followup" "all" "body" "head")))
2864	  scores header regexp regexps)
2865      (while (not (equal "" (setq header (completing-read
2866					  "Match on header: " headers nil t))))
2867	(setq regexps nil)
2868	(while (not (equal "" (setq regexp (read-string
2869					    (format "Match on %s (regexp): "
2870						    header)))))
2871	  (push (list regexp nil nil 'r) regexps))
2872	(push (cons header regexps) scores))
2873      scores)))
2874  (gnus-group-make-group group "nnkiboze" address)
2875  (let* ((nnkiboze-current-group group)
2876	 (score-file (car (nnkiboze-score-file "")))
2877	 (score-dir (file-name-directory score-file)))
2878    (unless (file-exists-p score-dir)
2879      (make-directory score-dir))
2880    (with-temp-file score-file
2881      (let (emacs-lisp-mode-hook)
2882	(gnus-pp scores)))))
2883
2884(defun gnus-group-add-to-virtual (n vgroup)
2885  "Add the current group to a virtual group."
2886  (interactive
2887   (list current-prefix-arg
2888	 (completing-read "Add to virtual group: " gnus-newsrc-hashtb nil t
2889			  "nnvirtual:")))
2890  (unless (eq (car (gnus-find-method-for-group vgroup)) 'nnvirtual)
2891    (error "%s is not an nnvirtual group" vgroup))
2892  (gnus-close-group vgroup)
2893  (let* ((groups (gnus-group-process-prefix n))
2894	 (method (gnus-info-method (gnus-get-info vgroup))))
2895    (setcar (cdr method)
2896	    (concat
2897	     (nth 1 method) "\\|"
2898	     (mapconcat
2899	      (lambda (s)
2900		(gnus-group-remove-mark s)
2901		(concat "\\(^" (regexp-quote s) "$\\)"))
2902	      groups "\\|"))))
2903  (gnus-group-position-point))
2904
2905(defun gnus-group-make-empty-virtual (group)
2906  "Create a new, fresh, empty virtual group."
2907  (interactive "sCreate new, empty virtual group: ")
2908  (let* ((method (list 'nnvirtual "^$"))
2909	 (pgroup (gnus-group-prefixed-name group method)))
2910    ;; Check whether it exists already.
2911    (when (gnus-gethash pgroup gnus-newsrc-hashtb)
2912      (error "Group %s already exists" pgroup))
2913    ;; Subscribe the new group after the group on the current line.
2914    (gnus-subscribe-group pgroup (gnus-group-group-name) method)
2915    (gnus-group-update-group pgroup)
2916    (forward-line -1)
2917    (gnus-group-position-point)))
2918
2919(defun gnus-group-enter-directory (dir)
2920  "Enter an ephemeral nneething group."
2921  (interactive "DDirectory to read: ")
2922  (let* ((method (list 'nneething dir '(nneething-read-only t)))
2923	 (leaf (gnus-group-prefixed-name
2924		(file-name-nondirectory (directory-file-name dir))
2925		method))
2926	 (name (gnus-generate-new-group-name leaf)))
2927    (unless (gnus-group-read-ephemeral-group
2928	     name method t
2929	     (cons (current-buffer)
2930		   (if (eq major-mode 'gnus-summary-mode)
2931		       'summary 'group)))
2932      (error "Couldn't enter %s" dir))))
2933
2934(eval-and-compile
2935  (autoload 'nnimap-expunge "nnimap")
2936  (autoload 'nnimap-acl-get "nnimap")
2937  (autoload 'nnimap-acl-edit "nnimap"))
2938
2939(defun gnus-group-nnimap-expunge (group)
2940  "Expunge deleted articles in current nnimap GROUP."
2941  (interactive (list (gnus-group-group-name)))
2942  (let ((mailbox (gnus-group-real-name group)) method)
2943    (unless group
2944      (error "No group on current line"))
2945    (unless (gnus-get-info group)
2946      (error "Killed group; can't be edited"))
2947    (unless (eq 'nnimap (car (setq method (gnus-find-method-for-group group))))
2948      (error "%s is not an nnimap group" group))
2949    (nnimap-expunge mailbox (cadr method))))
2950
2951(defun gnus-group-nnimap-edit-acl (group)
2952  "Edit the Access Control List of current nnimap GROUP."
2953  (interactive (list (gnus-group-group-name)))
2954  (let ((mailbox (gnus-group-real-name group)) method acl)
2955    (unless group
2956      (error "No group on current line"))
2957    (unless (gnus-get-info group)
2958      (error "Killed group; can't be edited"))
2959    (unless (eq (car (setq method (gnus-find-method-for-group group))) 'nnimap)
2960      (error "%s is not an nnimap group" group))
2961    (unless (setq acl (nnimap-acl-get mailbox (cadr method)))
2962      (error "Server does not support ACL's"))
2963    (gnus-edit-form acl (format "Editing the access control list for `%s'.
2964
2965   An access control list is a list of (identifier . rights) elements.
2966
2967   The identifier string specifies the corresponding user.  The
2968   identifier \"anyone\" is reserved to refer to the universal identity.
2969
2970   Rights is a string listing a (possibly empty) set of alphanumeric
2971   characters, each character listing a set of operations which is being
2972   controlled.  Letters are reserved for ``standard'' rights, listed
2973   below.  Digits are reserved for implementation or site defined rights.
2974
2975   l - lookup (mailbox is visible to LIST/LSUB commands)
2976   r - read (SELECT the mailbox, perform CHECK, FETCH, PARTIAL,
2977       SEARCH, COPY from mailbox)
2978   s - keep seen/unseen information across sessions (STORE \\SEEN flag)
2979   w - write (STORE flags other than \\SEEN and \\DELETED)
2980   i - insert (perform APPEND, COPY into mailbox)
2981   p - post (send mail to submission address for mailbox,
2982       not enforced by IMAP4 itself)
2983   c - create and delete mailbox (CREATE new sub-mailboxes in any
2984       implementation-defined hierarchy, RENAME or DELETE mailbox)
2985   d - delete messages (STORE \\DELETED flag, perform EXPUNGE)
2986   a - administer (perform SETACL)" group)
2987		    `(lambda (form)
2988		       (nnimap-acl-edit
2989			,mailbox ',method ',acl form)))))
2990
2991;; Group sorting commands
2992;; Suggested by Joe Hildebrand <hildjj@idaho.fuentez.com>.
2993
2994(defun gnus-group-sort-groups (func &optional reverse)
2995  "Sort the group buffer according to FUNC.
2996When used interactively, the sorting function used will be
2997determined by the `gnus-group-sort-function' variable.
2998If REVERSE (the prefix), reverse the sorting order."
2999  (interactive (list gnus-group-sort-function current-prefix-arg))
3000  (funcall gnus-group-sort-alist-function
3001	   (gnus-make-sort-function func) reverse)
3002  (gnus-group-unmark-all-groups)
3003  (gnus-group-list-groups)
3004  (gnus-dribble-touch))
3005
3006(defun gnus-group-sort-flat (func reverse)
3007  ;; We peel off the dummy group from the alist.
3008  (when func
3009    (when (equal (gnus-info-group (car gnus-newsrc-alist)) "dummy.group")
3010      (pop gnus-newsrc-alist))
3011    ;; Do the sorting.
3012    (setq gnus-newsrc-alist
3013	  (sort gnus-newsrc-alist func))
3014    (when reverse
3015      (setq gnus-newsrc-alist (nreverse gnus-newsrc-alist)))
3016    ;; Regenerate the hash table.
3017    (gnus-make-hashtable-from-newsrc-alist)))
3018
3019(defun gnus-group-sort-groups-by-alphabet (&optional reverse)
3020  "Sort the group buffer alphabetically by group name.
3021If REVERSE, sort in reverse order."
3022  (interactive "P")
3023  (gnus-group-sort-groups 'gnus-group-sort-by-alphabet reverse))
3024
3025(defun gnus-group-sort-groups-by-real-name (&optional reverse)
3026  "Sort the group buffer alphabetically by real (unprefixed) group name.
3027If REVERSE, sort in reverse order."
3028  (interactive "P")
3029  (gnus-group-sort-groups 'gnus-group-sort-by-real-name reverse))
3030
3031(defun gnus-group-sort-groups-by-unread (&optional reverse)
3032  "Sort the group buffer by number of unread articles.
3033If REVERSE, sort in reverse order."
3034  (interactive "P")
3035  (gnus-group-sort-groups 'gnus-group-sort-by-unread reverse))
3036
3037(defun gnus-group-sort-groups-by-level (&optional reverse)
3038  "Sort the group buffer by group level.
3039If REVERSE, sort in reverse order."
3040  (interactive "P")
3041  (gnus-group-sort-groups 'gnus-group-sort-by-level reverse))
3042
3043(defun gnus-group-sort-groups-by-score (&optional reverse)
3044  "Sort the group buffer by group score.
3045If REVERSE, sort in reverse order."
3046  (interactive "P")
3047  (gnus-group-sort-groups 'gnus-group-sort-by-score reverse))
3048
3049(defun gnus-group-sort-groups-by-rank (&optional reverse)
3050  "Sort the group buffer by group rank.
3051If REVERSE, sort in reverse order."
3052  (interactive "P")
3053  (gnus-group-sort-groups 'gnus-group-sort-by-rank reverse))
3054
3055(defun gnus-group-sort-groups-by-method (&optional reverse)
3056  "Sort the group buffer alphabetically by back end name.
3057If REVERSE, sort in reverse order."
3058  (interactive "P")
3059  (gnus-group-sort-groups 'gnus-group-sort-by-method reverse))
3060
3061(defun gnus-group-sort-groups-by-server (&optional reverse)
3062  "Sort the group buffer alphabetically by server name.
3063If REVERSE, sort in reverse order."
3064  (interactive "P")
3065  (gnus-group-sort-groups 'gnus-group-sort-by-server reverse))
3066
3067;;; Selected group sorting.
3068
3069(defun gnus-group-sort-selected-groups (n func &optional reverse)
3070  "Sort the process/prefixed groups."
3071  (interactive (list current-prefix-arg gnus-group-sort-function))
3072  (let ((groups (gnus-group-process-prefix n)))
3073    (funcall gnus-group-sort-selected-function
3074	     groups (gnus-make-sort-function func) reverse)
3075    (gnus-group-unmark-all-groups)
3076    (gnus-group-list-groups)
3077    (gnus-dribble-touch)))
3078
3079(defun gnus-group-sort-selected-flat (groups func reverse)
3080  (let (entries infos)
3081    ;; First find all the group entries for these groups.
3082    (while groups
3083      (push (nthcdr 2 (gnus-gethash (pop groups) gnus-newsrc-hashtb))
3084	    entries))
3085    ;; Then sort the infos.
3086    (setq infos
3087	  (sort
3088	   (mapcar
3089	    (lambda (entry) (car entry))
3090	    (setq entries (nreverse entries)))
3091	   func))
3092    (when reverse
3093      (setq infos (nreverse infos)))
3094    ;; Go through all the infos and replace the old entries
3095    ;; with the new infos.
3096    (while infos
3097      (setcar (car entries) (pop infos))
3098      (pop entries))
3099    ;; Update the hashtable.
3100    (gnus-make-hashtable-from-newsrc-alist)))
3101
3102(defun gnus-group-sort-selected-groups-by-alphabet (&optional n reverse)
3103  "Sort the group buffer alphabetically by group name.
3104Obeys the process/prefix convention.  If REVERSE (the symbolic prefix),
3105sort in reverse order."
3106  (interactive (gnus-interactive "P\ny"))
3107  (gnus-group-sort-selected-groups n 'gnus-group-sort-by-alphabet reverse))
3108
3109(defun gnus-group-sort-selected-groups-by-real-name (&optional n reverse)
3110  "Sort the group buffer alphabetically by real group name.
3111Obeys the process/prefix convention.  If REVERSE (the symbolic prefix),
3112sort in reverse order."
3113  (interactive (gnus-interactive "P\ny"))
3114  (gnus-group-sort-selected-groups n 'gnus-group-sort-by-real-name reverse))
3115
3116(defun gnus-group-sort-selected-groups-by-unread (&optional n reverse)
3117  "Sort the group buffer by number of unread articles.
3118Obeys the process/prefix convention.  If REVERSE (the symbolic prefix),
3119sort in reverse order."
3120  (interactive (gnus-interactive "P\ny"))
3121  (gnus-group-sort-selected-groups n 'gnus-group-sort-by-unread reverse))
3122
3123(defun gnus-group-sort-selected-groups-by-level (&optional n reverse)
3124  "Sort the group buffer by group level.
3125Obeys the process/prefix convention.  If REVERSE (the symbolic prefix),
3126sort in reverse order."
3127  (interactive (gnus-interactive "P\ny"))
3128  (gnus-group-sort-selected-groups n 'gnus-group-sort-by-level reverse))
3129
3130(defun gnus-group-sort-selected-groups-by-score (&optional n reverse)
3131  "Sort the group buffer by group score.
3132Obeys the process/prefix convention.  If REVERSE (the symbolic prefix),
3133sort in reverse order."
3134  (interactive (gnus-interactive "P\ny"))
3135  (gnus-group-sort-selected-groups n 'gnus-group-sort-by-score reverse))
3136
3137(defun gnus-group-sort-selected-groups-by-rank (&optional n reverse)
3138  "Sort the group buffer by group rank.
3139Obeys the process/prefix convention.  If REVERSE (the symbolic prefix),
3140sort in reverse order."
3141  (interactive (gnus-interactive "P\ny"))
3142  (gnus-group-sort-selected-groups n 'gnus-group-sort-by-rank reverse))
3143
3144(defun gnus-group-sort-selected-groups-by-method (&optional n reverse)
3145  "Sort the group buffer alphabetically by back end name.
3146Obeys the process/prefix convention.  If REVERSE (the symbolic prefix),
3147sort in reverse order."
3148  (interactive (gnus-interactive "P\ny"))
3149  (gnus-group-sort-selected-groups n 'gnus-group-sort-by-method reverse))
3150
3151;;; Sorting predicates.
3152
3153(defun gnus-group-sort-by-alphabet (info1 info2)
3154  "Sort alphabetically."
3155  (string< (gnus-info-group info1) (gnus-info-group info2)))
3156
3157(defun gnus-group-sort-by-real-name (info1 info2)
3158  "Sort alphabetically on real (unprefixed) names."
3159  (string< (gnus-group-real-name (gnus-info-group info1))
3160	   (gnus-group-real-name (gnus-info-group info2))))
3161
3162(defun gnus-group-sort-by-unread (info1 info2)
3163  "Sort by number of unread articles."
3164  (let ((n1 (car (gnus-gethash (gnus-info-group info1) gnus-newsrc-hashtb)))
3165	(n2 (car (gnus-gethash (gnus-info-group info2) gnus-newsrc-hashtb))))
3166    (< (or (and (numberp n1) n1) 0)
3167       (or (and (numberp n2) n2) 0))))
3168
3169(defun gnus-group-sort-by-level (info1 info2)
3170  "Sort by level."
3171  (< (gnus-info-level info1) (gnus-info-level info2)))
3172
3173(defun gnus-group-sort-by-method (info1 info2)
3174  "Sort alphabetically by back end name."
3175  (string< (car (gnus-find-method-for-group
3176		 (gnus-info-group info1) info1))
3177	   (car (gnus-find-method-for-group
3178		 (gnus-info-group info2) info2))))
3179
3180(defun gnus-group-sort-by-server (info1 info2)
3181  "Sort alphabetically by server name."
3182  (string< (gnus-method-to-full-server-name
3183	    (gnus-find-method-for-group
3184	     (gnus-info-group info1) info1))
3185	   (gnus-method-to-full-server-name
3186	    (gnus-find-method-for-group
3187	     (gnus-info-group info2) info2))))
3188
3189(defun gnus-group-sort-by-score (info1 info2)
3190  "Sort by group score."
3191  (> (gnus-info-score info1) (gnus-info-score info2)))
3192
3193(defun gnus-group-sort-by-rank (info1 info2)
3194  "Sort by level and score."
3195  (let ((level1 (gnus-info-level info1))
3196	(level2 (gnus-info-level info2)))
3197    (or (< level1 level2)
3198	(and (= level1 level2)
3199	     (> (gnus-info-score info1) (gnus-info-score info2))))))
3200
3201;;; Clearing data
3202
3203(defun gnus-group-clear-data (&optional arg)
3204  "Clear all marks and read ranges from the current group.
3205Obeys the process/prefix convention."
3206  (interactive "P")
3207  (gnus-group-iterate arg
3208    (lambda (group)
3209      (let (info)
3210	(gnus-info-clear-data (setq info (gnus-get-info group)))
3211	(gnus-get-unread-articles-in-group info (gnus-active group) t)
3212	(when (gnus-group-goto-group group)
3213	  (gnus-group-update-group-line))))))
3214
3215(defun gnus-group-clear-data-on-native-groups ()
3216  "Clear all marks and read ranges from all native groups."
3217  (interactive)
3218  (when (gnus-yes-or-no-p "Really clear all data from almost all groups? ")
3219    (let ((alist (cdr gnus-newsrc-alist))
3220	  info)
3221      (while (setq info (pop alist))
3222	(when (gnus-group-native-p (gnus-info-group info))
3223	  (gnus-info-clear-data info)))
3224      (gnus-get-unread-articles)
3225      (gnus-dribble-touch)
3226      (when (gnus-y-or-n-p
3227	     "Move the cache away to avoid problems in the future? ")
3228	(call-interactively 'gnus-cache-move-cache)))))
3229
3230(defun gnus-info-clear-data (info)
3231  "Clear all marks and read ranges from INFO."
3232  (let ((group (gnus-info-group info))
3233	action)
3234    (dolist (el (gnus-info-marks info))
3235      (push `(,(cdr el) add (,(car el))) action))
3236    (push `(,(gnus-info-read info) add (read)) action)
3237    (gnus-undo-register
3238      `(progn
3239	 (gnus-request-set-mark ,group ',action)
3240	 (gnus-info-set-marks ',info ',(gnus-info-marks info) t)
3241	 (gnus-info-set-read ',info ',(gnus-info-read info))
3242	 (when (gnus-group-goto-group ,group)
3243	   (gnus-get-unread-articles-in-group ',info ',(gnus-active group) t)
3244	   (gnus-group-update-group-line))))
3245    (setq action (mapcar (lambda (el) (list (nth 0 el) 'del (nth 2 el)))
3246			 action))
3247    (gnus-request-set-mark group action)
3248    (gnus-info-set-read info nil)
3249    (when (gnus-info-marks info)
3250      (gnus-info-set-marks info nil))))
3251
3252;; Group catching up.
3253
3254(defun gnus-group-catchup-current (&optional n all)
3255  "Mark all unread articles in the current newsgroup as read.
3256If prefix argument N is numeric, the next N newsgroups will be
3257caught up.  If ALL is non-nil, marked articles will also be marked as
3258read.  Cross references (Xref: header) of articles are ignored.
3259The number of newsgroups that this function was unable to catch
3260up is returned."
3261  (interactive "P")
3262  (let ((groups (gnus-group-process-prefix n))
3263	(ret 0)
3264	group)
3265    (unless groups (error "No groups selected"))
3266    (if (not
3267	 (or (not gnus-interactive-catchup) ;Without confirmation?
3268	     gnus-expert-user
3269	     (gnus-y-or-n-p
3270	      (format
3271	       (if all
3272		   "Do you really want to mark all articles in %s as read? "
3273		 "Mark all unread articles in %s as read? ")
3274	       (if (= (length groups) 1)
3275		   (gnus-group-decoded-name (car groups))
3276		 (format "these %d groups" (length groups)))))))
3277	n
3278      (while (setq group (pop groups))
3279	(gnus-group-remove-mark group)
3280	;; Virtual groups have to be given special treatment.
3281	(let ((method (gnus-find-method-for-group group)))
3282	  (when (eq 'nnvirtual (car method))
3283	    (nnvirtual-catchup-group
3284	     (gnus-group-real-name group) (nth 1 method) all)))
3285	(if (>= (gnus-group-level group) gnus-level-zombie)
3286	    (gnus-message 2 "Dead groups can't be caught up")
3287	  (if (prog1
3288		  (gnus-group-goto-group group)
3289		(gnus-group-catchup group all))
3290	      (gnus-group-update-group-line)
3291	    (setq ret (1+ ret)))))
3292      (gnus-group-next-unread-group 1)
3293      ret)))
3294
3295(defun gnus-group-catchup-current-all (&optional n)
3296  "Mark all articles in current newsgroup as read.
3297Cross references (Xref: header) of articles are ignored."
3298  (interactive "P")
3299  (gnus-group-catchup-current n 'all))
3300
3301(defun gnus-group-catchup (group &optional all)
3302  "Mark all articles in GROUP as read.
3303If ALL is non-nil, all articles are marked as read.
3304The return value is the number of articles that were marked as read,
3305or nil if no action could be taken."
3306  (let* ((entry (gnus-gethash group gnus-newsrc-hashtb))
3307	 (num (car entry))
3308	 (marks (nth 3 (nth 2 entry)))
3309	 (unread (gnus-sequence-of-unread-articles group)))
3310    ;; Remove entries for this group.
3311    (nnmail-purge-split-history (gnus-group-real-name group))
3312    ;; Do the updating only if the newsgroup isn't killed.
3313    (if (not (numberp (car entry)))
3314	(gnus-message 1 "Can't catch up %s; non-active group" group)
3315      (gnus-update-read-articles group nil)
3316      (when all
3317	;; Nix out the lists of marks and dormants.
3318	(gnus-request-set-mark group (list (list (cdr (assq 'tick marks))
3319						 'del '(tick))
3320					   (list (cdr (assq 'dormant marks))
3321						 'del '(dormant))))
3322	(setq unread (gnus-range-add (gnus-range-add
3323				      unread (cdr (assq 'dormant marks)))
3324				     (cdr (assq 'tick marks))))
3325	(gnus-add-marked-articles group 'tick nil nil 'force)
3326	(gnus-add-marked-articles group 'dormant nil nil 'force))
3327      ;; Do auto-expirable marks if that's required.
3328      (when (gnus-group-auto-expirable-p group)
3329        (gnus-range-map (lambda (article)
3330                          (gnus-add-marked-articles group 'expire (list article))
3331                          (gnus-request-set-mark group (list (list (list article) 'add '(expire)))))
3332                        unread))
3333      (let ((gnus-newsgroup-name group))
3334	(gnus-run-hooks 'gnus-group-catchup-group-hook))
3335      num)))
3336
3337(defun gnus-group-expire-articles (&optional n)
3338  "Expire all expirable articles in the current newsgroup.
3339Uses the process/prefix convention."
3340  (interactive "P")
3341  (let ((groups (gnus-group-process-prefix n))
3342	group)
3343    (unless groups
3344      (error "No groups to expire"))
3345    (while (setq group (pop groups))
3346      (gnus-group-remove-mark group)
3347      (gnus-group-expire-articles-1 group)
3348      (gnus-dribble-touch)
3349      (gnus-group-position-point))))
3350
3351(defun gnus-group-expire-articles-1 (group)
3352  (when (gnus-check-backend-function 'request-expire-articles group)
3353    (gnus-message 6 "Expiring articles in %s..."
3354		  (gnus-group-decoded-name group))
3355    (let* ((info (gnus-get-info group))
3356	   (expirable (if (gnus-group-total-expirable-p group)
3357			  (cons nil (gnus-list-of-read-articles group))
3358			(assq 'expire (gnus-info-marks info))))
3359	   (expiry-wait (gnus-group-find-parameter group 'expiry-wait))
3360	   (nnmail-expiry-target
3361	    (or (gnus-group-find-parameter group 'expiry-target)
3362		nnmail-expiry-target)))
3363      (when expirable
3364	(gnus-check-group group)
3365	(setcdr
3366	 expirable
3367	 (gnus-compress-sequence
3368	  (if expiry-wait
3369	      ;; We set the expiry variables to the group
3370	      ;; parameter.
3371	      (let ((nnmail-expiry-wait-function nil)
3372		    (nnmail-expiry-wait expiry-wait))
3373		(gnus-request-expire-articles
3374		 (gnus-uncompress-sequence (cdr expirable)) group))
3375	    ;; Just expire using the normal expiry values.
3376	    (gnus-request-expire-articles
3377	     (gnus-uncompress-sequence (cdr expirable)) group))))
3378	(gnus-close-group group))
3379      (gnus-message 6 "Expiring articles in %s...done"
3380		    (gnus-group-decoded-name group))
3381      ;; Return the list of un-expired articles.
3382      (cdr expirable))))
3383
3384(defun gnus-group-expire-all-groups ()
3385  "Expire all expirable articles in all newsgroups."
3386  (interactive)
3387  (save-excursion
3388    (gnus-message 5 "Expiring...")
3389    (let ((gnus-group-marked (mapcar (lambda (info) (gnus-info-group info))
3390				     (cdr gnus-newsrc-alist))))
3391      (gnus-group-expire-articles nil)))
3392  (gnus-group-position-point)
3393  (gnus-message 5 "Expiring...done"))
3394
3395(defun gnus-group-set-current-level (n level)
3396  "Set the level of the next N groups to LEVEL."
3397  (interactive
3398   (list
3399    current-prefix-arg
3400    (progn
3401      (unless (gnus-group-process-prefix current-prefix-arg)
3402	(error "No group on the current line"))
3403      (string-to-number
3404       (let ((s (read-string
3405		 (format "Level (default %s): "
3406			 (or (gnus-group-group-level)
3407			     gnus-level-default-subscribed)))))
3408	 (if (string-match "^\\s-*$" s)
3409	     (int-to-string (or (gnus-group-group-level)
3410				gnus-level-default-subscribed))
3411	   s))))))
3412  (unless (and (>= level 1) (<= level gnus-level-killed))
3413    (error "Invalid level: %d" level))
3414  (let ((groups (gnus-group-process-prefix n))
3415	group)
3416    (while (setq group (pop groups))
3417      (gnus-group-remove-mark group)
3418      (gnus-message 6 "Changed level of %s from %d to %d"
3419		    (gnus-group-decoded-name group)
3420		    (or (gnus-group-group-level) gnus-level-killed)
3421		    level)
3422      (gnus-group-change-level
3423       group level (or (gnus-group-group-level) gnus-level-killed))
3424      (gnus-group-update-group-line)))
3425  (gnus-group-position-point))
3426
3427(defun gnus-group-unsubscribe (&optional n)
3428  "Unsubscribe the current group."
3429  (interactive "P")
3430  (gnus-group-unsubscribe-current-group n 'unsubscribe))
3431
3432(defun gnus-group-subscribe (&optional n)
3433  "Subscribe the current group."
3434  (interactive "P")
3435  (gnus-group-unsubscribe-current-group n 'subscribe))
3436
3437(defun gnus-group-unsubscribe-current-group (&optional n do-sub)
3438  "Toggle subscription of the current group.
3439If given numerical prefix, toggle the N next groups."
3440  (interactive "P")
3441  (dolist (group (gnus-group-process-prefix n))
3442    (gnus-group-remove-mark group)
3443    (gnus-group-unsubscribe-group
3444     group
3445     (cond
3446      ((eq do-sub 'unsubscribe)
3447       gnus-level-default-unsubscribed)
3448      ((eq do-sub 'subscribe)
3449       gnus-level-default-subscribed)
3450      ((<= (gnus-group-group-level) gnus-level-subscribed)
3451       gnus-level-default-unsubscribed)
3452      (t
3453       gnus-level-default-subscribed))
3454     t)
3455    (gnus-group-update-group-line))
3456  (gnus-group-next-group 1))
3457
3458(defun gnus-group-unsubscribe-group (group &optional level silent)
3459  "Toggle subscription to GROUP.
3460Killed newsgroups are subscribed.  If SILENT, don't try to update the
3461group line."
3462  (interactive
3463   (list (completing-read
3464	  "Group: " gnus-active-hashtb nil
3465	  (gnus-read-active-file-p)
3466	  nil
3467	  'gnus-group-history)))
3468  (let ((newsrc (gnus-gethash group gnus-newsrc-hashtb)))
3469    (cond
3470     ((string-match "^[ \t]*$" group)
3471      (error "Empty group name"))
3472     (newsrc
3473      ;; Toggle subscription flag.
3474      (gnus-group-change-level
3475       newsrc (if level level (if (<= (gnus-info-level (nth 2 newsrc))
3476				      gnus-level-subscribed)
3477				  (1+ gnus-level-subscribed)
3478				gnus-level-default-subscribed)))
3479      (unless silent
3480	(gnus-group-update-group group)))
3481     ((and (stringp group)
3482	   (or (not (gnus-read-active-file-p))
3483	       (gnus-active group)))
3484      ;; Add new newsgroup.
3485      (gnus-group-change-level
3486       group
3487       (if level level gnus-level-default-subscribed)
3488       (or (and (member group gnus-zombie-list)
3489		gnus-level-zombie)
3490	   gnus-level-killed)
3491       (when (gnus-group-group-name)
3492	 (gnus-gethash (gnus-group-group-name) gnus-newsrc-hashtb)))
3493      (unless silent
3494	(gnus-group-update-group group)))
3495     (t (error "No such newsgroup: %s" group)))
3496    (gnus-group-position-point)))
3497
3498(defun gnus-group-transpose-groups (n)
3499  "Move the current newsgroup up N places.
3500If given a negative prefix, move down instead.  The difference between
3501N and the number of steps taken is returned."
3502  (interactive "p")
3503  (unless (gnus-group-group-name)
3504    (error "No group on current line"))
3505  (gnus-group-kill-group 1)
3506  (prog1
3507      (forward-line (- n))
3508    (gnus-group-yank-group)
3509    (gnus-group-position-point)))
3510
3511(defun gnus-group-kill-all-zombies (&optional dummy)
3512  "Kill all zombie newsgroups.
3513The optional DUMMY should always be nil."
3514  (interactive (list (not (gnus-yes-or-no-p "Really kill all zombies? "))))
3515  (unless dummy
3516    (setq gnus-killed-list (nconc gnus-zombie-list gnus-killed-list))
3517    (setq gnus-zombie-list nil)
3518    (gnus-dribble-touch)
3519    (gnus-group-list-groups)))
3520
3521(defun gnus-group-kill-region (begin end)
3522  "Kill newsgroups in current region (excluding current point).
3523The killed newsgroups can be yanked by using \\[gnus-group-yank-group]."
3524  (interactive "r")
3525  (let ((lines
3526	 ;; Count lines.
3527	 (save-excursion
3528	   (count-lines
3529	    (progn
3530	      (goto-char begin)
3531	      (beginning-of-line)
3532	      (point))
3533	    (progn
3534	      (goto-char end)
3535	      (beginning-of-line)
3536	      (point))))))
3537    (goto-char begin)
3538    (beginning-of-line)			;Important when LINES < 1
3539    (gnus-group-kill-group lines)))
3540
3541(defun gnus-group-kill-group (&optional n discard)
3542  "Kill the next N groups.
3543The killed newsgroups can be yanked by using \\[gnus-group-yank-group].
3544However, only groups that were alive can be yanked; already killed
3545groups or zombie groups can't be yanked.
3546The return value is the name of the group that was killed, or a list
3547of groups killed."
3548  (interactive "P")
3549  (let ((buffer-read-only nil)
3550	(groups (gnus-group-process-prefix n))
3551	group entry level out)
3552    (if (< (length groups) 10)
3553	;; This is faster when there are few groups.
3554	(while groups
3555	  (push (setq group (pop groups)) out)
3556	  (gnus-group-remove-mark group)
3557	  (setq level (gnus-group-group-level))
3558	  (gnus-delete-line)
3559	  (when (and (not discard)
3560		     (setq entry (gnus-gethash group gnus-newsrc-hashtb)))
3561	    (gnus-undo-register
3562	      `(progn
3563		 (gnus-group-goto-group ,(gnus-group-group-name))
3564		 (gnus-group-yank-group)))
3565	    (push (cons (car entry) (nth 2 entry))
3566		  gnus-list-of-killed-groups))
3567	  (gnus-group-change-level
3568	   (if entry entry group) gnus-level-killed (if entry nil level))
3569	  (message "Killed group %s" (gnus-group-decoded-name group)))
3570      ;; If there are lots and lots of groups to be killed, we use
3571      ;; this thing instead.
3572      (dolist (group (nreverse groups))
3573	(gnus-group-remove-mark group)
3574	(gnus-delete-line)
3575	(push group gnus-killed-list)
3576	(setq gnus-newsrc-alist
3577	      (delq (assoc group gnus-newsrc-alist)
3578		    gnus-newsrc-alist))
3579	(when gnus-group-change-level-function
3580	  (funcall gnus-group-change-level-function
3581		   group gnus-level-killed 3))
3582	(cond
3583	 ((setq entry (gnus-gethash group gnus-newsrc-hashtb))
3584	  (push (cons (car entry) (nth 2 entry))
3585		gnus-list-of-killed-groups)
3586	  (setcdr (cdr entry) (cdddr entry)))
3587	 ((member group gnus-zombie-list)
3588	  (setq gnus-zombie-list (delete group gnus-zombie-list))))
3589	;; There may be more than one instance displayed.
3590	(while (gnus-group-goto-group group)
3591	  (gnus-delete-line)))
3592      (gnus-make-hashtable-from-newsrc-alist))
3593
3594    (gnus-group-position-point)
3595    (if (< (length out) 2) (car out) (nreverse out))))
3596
3597(defun gnus-group-yank-group (&optional arg)
3598  "Yank the last newsgroups killed with \\[gnus-group-kill-group], inserting it before the current newsgroup.
3599The numeric ARG specifies how many newsgroups are to be yanked.  The
3600name of the newsgroup yanked is returned, or (if several groups are
3601yanked) a list of yanked groups is returned."
3602  (interactive "p")
3603  (setq arg (or arg 1))
3604  (let (info group prev out)
3605    (while (>= (decf arg) 0)
3606      (when (not (setq info (pop gnus-list-of-killed-groups)))
3607	(error "No more newsgroups to yank"))
3608      (push (setq group (nth 1 info)) out)
3609      ;; Find which newsgroup to insert this one before - search
3610      ;; backward until something suitable is found.  If there are no
3611      ;; other newsgroups in this buffer, just make this newsgroup the
3612      ;; first newsgroup.
3613      (setq prev (gnus-group-group-name))
3614      (gnus-group-change-level
3615       info (gnus-info-level (cdr info)) gnus-level-killed
3616       (and prev (gnus-gethash prev gnus-newsrc-hashtb))
3617       t)
3618      (gnus-group-insert-group-line-info group)
3619      (gnus-undo-register
3620	`(when (gnus-group-goto-group ,group)
3621	   (gnus-group-kill-group 1))))
3622    (forward-line -1)
3623    (gnus-group-position-point)
3624    (if (< (length out) 2) (car out) (nreverse out))))
3625
3626(defun gnus-group-kill-level (level)
3627  "Kill all groups that is on a certain LEVEL."
3628  (interactive "nKill all groups on level: ")
3629  (cond
3630   ((= level gnus-level-zombie)
3631    (setq gnus-killed-list
3632	  (nconc gnus-zombie-list gnus-killed-list))
3633    (setq gnus-zombie-list nil))
3634   ((and (< level gnus-level-zombie)
3635	 (> level 0)
3636	 (or gnus-expert-user
3637	     (gnus-yes-or-no-p
3638	      (format
3639	       "Do you really want to kill all groups on level %d? "
3640	       level))))
3641    (let* ((prev gnus-newsrc-alist)
3642	   (alist (cdr prev)))
3643      (while alist
3644	(if (= (gnus-info-level (car alist)) level)
3645	    (progn
3646	      (push (gnus-info-group (car alist)) gnus-killed-list)
3647	      (setcdr prev (cdr alist)))
3648	  (setq prev alist))
3649	(setq alist (cdr alist)))
3650      (gnus-make-hashtable-from-newsrc-alist)
3651      (gnus-group-list-groups)))
3652   (t
3653    (error "Can't kill; invalid level: %d" level))))
3654
3655(defun gnus-group-list-all-groups (&optional arg)
3656  "List all newsgroups with level ARG or lower.
3657Default is `gnus-level-unsubscribed', which lists all subscribed and most
3658unsubscribed groups."
3659  (interactive "P")
3660  (gnus-group-list-groups (or arg gnus-level-unsubscribed) t))
3661
3662;; Redefine this to list ALL killed groups if prefix arg used.
3663;; Rewritten by engstrom@src.honeywell.com (Eric Engstrom).
3664(defun gnus-group-list-killed (&optional arg)
3665  "List all killed newsgroups in the group buffer.
3666If ARG is non-nil, list ALL killed groups known to Gnus.  This may
3667entail asking the server for the groups."
3668  (interactive "P")
3669  ;; Find all possible killed newsgroups if arg.
3670  (when arg
3671    (gnus-get-killed-groups))
3672  (if (not gnus-killed-list)
3673      (gnus-message 6 "No killed groups")
3674    (let (gnus-group-list-mode)
3675      (funcall gnus-group-prepare-function
3676	       gnus-level-killed t gnus-level-killed))
3677    (goto-char (point-min)))
3678  (gnus-group-position-point))
3679
3680(defun gnus-group-list-zombies ()
3681  "List all zombie newsgroups in the group buffer."
3682  (interactive)
3683  (if (not gnus-zombie-list)
3684      (gnus-message 6 "No zombie groups")
3685    (let (gnus-group-list-mode)
3686      (funcall gnus-group-prepare-function
3687	       gnus-level-zombie t gnus-level-zombie))
3688    (goto-char (point-min)))
3689  (gnus-group-position-point))
3690
3691(defun gnus-group-list-active ()
3692  "List all groups that are available from the server(s)."
3693  (interactive)
3694  ;; First we make sure that we have really read the active file.
3695  (unless (gnus-read-active-file-p)
3696    (let ((gnus-read-active-file t)
3697	  (gnus-agent gnus-plugged)); If we're actually plugged, store the active file in the agent.
3698      (gnus-read-active-file)))
3699  ;; Find all groups and sort them.
3700  (let ((groups
3701	 (sort
3702	  (let (list)
3703	    (mapatoms
3704	     (lambda (sym)
3705	       (and (boundp sym)
3706		    (symbol-value sym)
3707		    (push (symbol-name sym) list)))
3708	     gnus-active-hashtb)
3709	    list)
3710	  'string<))
3711	(buffer-read-only nil)
3712	group)
3713    (erase-buffer)
3714    (while groups
3715      (setq group (pop groups))
3716      (gnus-add-text-properties
3717       (point) (prog1 (1+ (point))
3718		 (insert "       *: "
3719			 (gnus-group-decoded-name group)
3720			 "\n"))
3721       (list 'gnus-group (gnus-intern-safe group gnus-active-hashtb)
3722	     'gnus-unread t
3723	     'gnus-level (inline (gnus-group-level group)))))
3724    (goto-char (point-min))))
3725
3726(defun gnus-activate-all-groups (level)
3727  "Activate absolutely all groups."
3728  (interactive (list gnus-level-unsubscribed))
3729  (let ((gnus-activate-level level)
3730	(gnus-activate-foreign-newsgroups level))
3731    (gnus-group-get-new-news)))
3732
3733(defun gnus-group-get-new-news (&optional arg)
3734  "Get newly arrived articles.
3735If ARG is a number, it specifies which levels you are interested in
3736re-scanning.  If ARG is non-nil and not a number, this will force
3737\"hard\" re-reading of the active files from all servers."
3738  (interactive "P")
3739  (require 'nnmail)
3740  (let ((gnus-inhibit-demon t)
3741	;; Binding this variable will inhibit multiple fetchings
3742	;; of the same mail source.
3743	(nnmail-fetched-sources (list t)))
3744    (gnus-run-hooks 'gnus-get-top-new-news-hook)
3745    (gnus-run-hooks 'gnus-get-new-news-hook)
3746
3747    ;; Read any slave files.
3748    (unless gnus-slave
3749      (gnus-master-read-slave-newsrc))
3750
3751    ;; We might read in new NoCeM messages here.
3752    (when (and gnus-use-nocem
3753	       (or (and (numberp gnus-use-nocem)
3754			(numberp arg)
3755			(>= arg gnus-use-nocem))
3756		   (not arg)))
3757      (gnus-nocem-scan-groups))
3758    ;; If ARG is not a number, then we read the active file.
3759    (when (and arg (not (numberp arg)))
3760      (let ((gnus-read-active-file t))
3761	(gnus-read-active-file))
3762      (setq arg nil)
3763
3764      ;; If the user wants it, we scan for new groups.
3765      (when (eq gnus-check-new-newsgroups 'always)
3766	(gnus-find-new-newsgroups)))
3767
3768    (setq arg (gnus-group-default-level arg t))
3769    (if (and gnus-read-active-file (not arg))
3770	(progn
3771	  (gnus-read-active-file)
3772	  (gnus-get-unread-articles arg))
3773      (let ((gnus-read-active-file (if arg nil gnus-read-active-file)))
3774	(gnus-get-unread-articles arg)))
3775    (gnus-run-hooks 'gnus-after-getting-new-news-hook)
3776    (gnus-group-list-groups (and (numberp arg)
3777				 (max (car gnus-group-list-mode) arg)))))
3778
3779(defun gnus-group-get-new-news-this-group (&optional n dont-scan)
3780  "Check for newly arrived news in the current group (and the N-1 next groups).
3781The difference between N and the number of newsgroup checked is returned.
3782If N is negative, this group and the N-1 previous groups will be checked.
3783If DONT-SCAN is non-nil, scan non-activated groups as well."
3784  (interactive "P")
3785  (let* ((groups (gnus-group-process-prefix n))
3786	 (ret (if (numberp n) (- n (length groups)) 0))
3787	 (beg (unless n
3788		(point)))
3789	 group method
3790	 (gnus-inhibit-demon t)
3791	 ;; Binding this variable will inhibit multiple fetchings
3792	 ;; of the same mail source.
3793	 (nnmail-fetched-sources (list t)))
3794    (gnus-run-hooks 'gnus-get-new-news-hook)
3795    (while (setq group (pop groups))
3796      (gnus-group-remove-mark group)
3797      ;; Bypass any previous denials from the server.
3798      (gnus-remove-denial (setq method (gnus-find-method-for-group group)))
3799      (if (gnus-activate-group group (if dont-scan nil 'scan))
3800	  (progn
3801	    (gnus-get-unread-articles-in-group
3802	     (gnus-get-info group) (gnus-active group) t)
3803	    (unless (gnus-virtual-group-p group)
3804	      (gnus-close-group group))
3805	    (when gnus-agent
3806	      (gnus-agent-save-group-info
3807	       method (gnus-group-real-name group) (gnus-active group)))
3808	    (gnus-group-update-group group))
3809	(if (eq (gnus-server-status (gnus-find-method-for-group group))
3810		'denied)
3811	    (gnus-error 3 "Server denied access")
3812	  (gnus-error 3 "%s error: %s" group (gnus-status-message group)))))
3813    (when beg
3814      (goto-char beg))
3815    (when gnus-goto-next-group-when-activating
3816      (gnus-group-next-unread-group 1 t))
3817    (gnus-summary-position-point)
3818    ret))
3819
3820(defun gnus-group-fetch-faq (group &optional faq-dir)
3821  "Fetch the FAQ for the current group.
3822If given a prefix argument, prompt for the FAQ dir
3823to use."
3824  (interactive
3825   (list
3826    (gnus-group-group-name)
3827    (when current-prefix-arg
3828      (completing-read
3829       "FAQ dir: " (and (listp gnus-group-faq-directory)
3830			(mapcar #'list
3831				gnus-group-faq-directory))))))
3832  (unless group
3833    (error "No group name given"))
3834  (let ((dirs (or faq-dir gnus-group-faq-directory))
3835	dir found file)
3836    (unless (listp dirs)
3837      (setq dirs (list dirs)))
3838    (while (and (not found)
3839		(setq dir (pop dirs)))
3840      (let ((name (gnus-group-real-name group)))
3841	(setq file (expand-file-name name dir)))
3842      (if (not (file-exists-p file))
3843	  (gnus-message 1 "No such file: %s" file)
3844	(let ((enable-local-variables nil))
3845	  (find-file file)
3846	  (setq found t))))))
3847
3848(defun gnus-group-fetch-charter (group)
3849  "Fetch the charter for the current group.
3850If given a prefix argument, prompt for a group."
3851  (interactive
3852   (list (or (when current-prefix-arg
3853	       (completing-read "Group: " gnus-active-hashtb))
3854	     (gnus-group-group-name)
3855	     gnus-newsgroup-name)))
3856  (unless group
3857    (error "No group name given"))
3858  (require 'mm-url)
3859  (condition-case nil (require 'url-http) (error nil))
3860  (let ((name (mm-url-form-encode-xwfu (gnus-group-real-name group)))
3861	url hierarchy)
3862    (when (string-match "\\(^[^\\.]+\\)\\..*" name)
3863      (setq hierarchy (match-string 1 name))
3864      (if (and (setq url (cdr (assoc hierarchy gnus-group-charter-alist)))
3865	       (if (fboundp 'url-http-file-exists-p)
3866		   (url-http-file-exists-p (eval url))
3867		 t))
3868	  (browse-url (eval url))
3869	(setq url (concat "http://" hierarchy
3870			  ".news-admin.org/charters/" name))
3871	(if (and (fboundp 'url-http-file-exists-p)
3872		 (url-http-file-exists-p url))
3873	    (browse-url url)
3874	  (gnus-group-fetch-control group))))))
3875
3876(defun gnus-group-fetch-control (group)
3877  "Fetch the archived control messages for the current group.
3878If given a prefix argument, prompt for a group."
3879  (interactive
3880   (list (or (when current-prefix-arg
3881	       (completing-read "Group: " gnus-active-hashtb))
3882	     (gnus-group-group-name)
3883	     gnus-newsgroup-name)))
3884  (unless group
3885    (error "No group name given"))
3886  (let ((name (gnus-group-real-name group))
3887	hierarchy)
3888    (when (string-match "\\(^[^\\.]+\\)\\..*" name)
3889      (setq hierarchy (match-string 1 name))
3890      (if gnus-group-fetch-control-use-browse-url
3891	  (browse-url (concat "ftp://ftp.isc.org/usenet/control/"
3892			      hierarchy "/" name ".gz"))
3893	(let ((enable-local-variables nil))
3894	  (gnus-group-read-ephemeral-group
3895	   group
3896	   `(nndoc ,group (nndoc-address
3897			   ,(find-file-noselect
3898			     (concat "/ftp@ftp.isc.org:/usenet/control/"
3899				     hierarchy "/" name ".gz")))
3900		   (nndoc-article-type mbox)) t nil nil))))))
3901
3902(defun gnus-group-describe-group (force &optional group)
3903  "Display a description of the current newsgroup."
3904  (interactive (list current-prefix-arg (gnus-group-group-name)))
3905  (let* ((method (gnus-find-method-for-group group))
3906	 (mname (gnus-group-prefixed-name "" method))
3907	 desc)
3908    (when (and force
3909	       gnus-description-hashtb)
3910      (gnus-sethash mname nil gnus-description-hashtb))
3911    (unless group
3912      (error "No group name given"))
3913    (when (or (and gnus-description-hashtb
3914		   ;; We check whether this group's method has been
3915		   ;; queried for a description file.
3916		   (gnus-gethash mname gnus-description-hashtb))
3917	      (setq desc (gnus-group-get-description group))
3918	      (gnus-read-descriptions-file method))
3919      (gnus-message 1
3920		    (or desc (gnus-gethash group gnus-description-hashtb)
3921			"No description available")))))
3922
3923;; Suggested by Per Abrahamsen <amanda@iesd.auc.dk>.
3924(defun gnus-group-describe-all-groups (&optional force)
3925  "Pop up a buffer with descriptions of all newsgroups."
3926  (interactive "P")
3927  (when force
3928    (setq gnus-description-hashtb nil))
3929  (when (not (or gnus-description-hashtb
3930		 (gnus-read-all-descriptions-files)))
3931    (error "Couldn't request descriptions file"))
3932  (let ((buffer-read-only nil)
3933	b)
3934    (erase-buffer)
3935    (mapatoms
3936     (lambda (group)
3937       (setq b (point))
3938       (let ((charset (gnus-group-name-charset nil (symbol-name group))))
3939	 (insert (format "      *: %-20s %s\n"
3940			 (gnus-group-name-decode
3941			  (symbol-name group) charset)
3942			 (gnus-group-name-decode
3943			  (symbol-value group) charset))))
3944       (gnus-add-text-properties
3945	b (1+ b) (list 'gnus-group group
3946		       'gnus-unread t 'gnus-marked nil
3947		       'gnus-level (1+ gnus-level-subscribed))))
3948     gnus-description-hashtb)
3949    (goto-char (point-min))
3950    (gnus-group-position-point)))
3951
3952;; Suggested by Daniel Quinlan <quinlan@best.com>.
3953(defun gnus-group-apropos (regexp &optional search-description)
3954  "List all newsgroups that have names that match a regexp."
3955  (interactive "sGnus apropos (regexp): ")
3956  (let ((prev "")
3957	(obuf (current-buffer))
3958	groups des)
3959    ;; Go through all newsgroups that are known to Gnus.
3960    (mapatoms
3961     (lambda (group)
3962       (and (symbol-name group)
3963	    (string-match regexp (symbol-name group))
3964	    (symbol-value group)
3965	    (push (symbol-name group) groups)))
3966     gnus-active-hashtb)
3967    ;; Also go through all descriptions that are known to Gnus.
3968    (when search-description
3969      (mapatoms
3970       (lambda (group)
3971	 (and (string-match regexp (symbol-value group))
3972	      (push (symbol-name group) groups)))
3973       gnus-description-hashtb))
3974    (if (not groups)
3975	(gnus-message 3 "No groups matched \"%s\"." regexp)
3976      ;; Print out all the groups.
3977      (save-excursion
3978	(pop-to-buffer "*Gnus Help*")
3979	(buffer-disable-undo)
3980	(erase-buffer)
3981	(setq groups (sort groups 'string<))
3982	(while groups
3983	  ;; Groups may be entered twice into the list of groups.
3984	  (when (not (string= (car groups) prev))
3985	    (setq prev (car groups))
3986	    (let ((charset (gnus-group-name-charset nil prev)))
3987	      (insert (gnus-group-name-decode prev charset) "\n")
3988	      (when (and gnus-description-hashtb
3989			 (setq des (gnus-gethash (car groups)
3990						 gnus-description-hashtb)))
3991		(insert "  " (gnus-group-name-decode des charset) "\n"))))
3992	  (setq groups (cdr groups)))
3993	(goto-char (point-min))))
3994    (pop-to-buffer obuf)))
3995
3996(defun gnus-group-description-apropos (regexp)
3997  "List all newsgroups that have names or descriptions that match REGEXP."
3998  (interactive "sGnus description apropos (regexp): ")
3999  (when (not (or gnus-description-hashtb
4000		 (gnus-read-all-descriptions-files)))
4001    (error "Couldn't request descriptions file"))
4002  (gnus-group-apropos regexp t))
4003
4004;; Suggested by Per Abrahamsen <amanda@iesd.auc.dk>.
4005(defun gnus-group-list-matching (level regexp &optional all lowest)
4006  "List all groups with unread articles that match REGEXP.
4007If the prefix LEVEL is non-nil, it should be a number that says which
4008level to cut off listing groups.
4009If ALL, also list groups with no unread articles.
4010If LOWEST, don't list groups with level lower than LOWEST.
4011
4012This command may read the active file."
4013  (interactive "P\nsList newsgroups matching: ")
4014  ;; First make sure active file has been read.
4015  (when (and level
4016	     (> (prefix-numeric-value level) gnus-level-killed))
4017    (gnus-get-killed-groups))
4018  (funcall gnus-group-prepare-function
4019   (or level gnus-level-subscribed) (and all t) (or lowest 1) regexp)
4020  (goto-char (point-min))
4021  (gnus-group-position-point))
4022
4023(defun gnus-group-list-all-matching (level regexp &optional lowest)
4024  "List all groups that match REGEXP.
4025If the prefix LEVEL is non-nil, it should be a number that says which
4026level to cut off listing groups.
4027If LOWEST, don't list groups with level lower than LOWEST."
4028  (interactive "P\nsList newsgroups matching: ")
4029  (when level
4030    (setq level (prefix-numeric-value level)))
4031  (gnus-group-list-matching (or level gnus-level-killed) regexp t lowest))
4032
4033;; Suggested by Jack Vinson <vinson@unagi.cis.upenn.edu>.
4034(defun gnus-group-save-newsrc (&optional force)
4035  "Save the Gnus startup files.
4036If FORCE, force saving whether it is necessary or not."
4037  (interactive "P")
4038  (gnus-save-newsrc-file force))
4039
4040(defun gnus-group-restart (&optional arg)
4041  "Force Gnus to read the .newsrc file."
4042  (interactive "P")
4043  (when (gnus-yes-or-no-p
4044	 (format "Are you sure you want to restart Gnus? "))
4045    (gnus-save-newsrc-file)
4046    (gnus-clear-system)
4047    (gnus)))
4048
4049(defun gnus-group-read-init-file ()
4050  "Read the Gnus elisp init file."
4051  (interactive)
4052  (gnus-read-init-file)
4053  (gnus-message 5 "Read %s" gnus-init-file))
4054
4055(defun gnus-group-check-bogus-groups (&optional silent)
4056  "Check bogus newsgroups.
4057If given a prefix, don't ask for confirmation before removing a bogus
4058group."
4059  (interactive "P")
4060  (gnus-check-bogus-newsgroups (and (not silent) (not gnus-expert-user)))
4061  (gnus-group-list-groups))
4062
4063(defun gnus-group-find-new-groups (&optional arg)
4064  "Search for new groups and add them.
4065Each new group will be treated with `gnus-subscribe-newsgroup-method'.
4066With 1 C-u, use the `ask-server' method to query the server for new
4067groups.
4068With 2 C-u's, use most complete method possible to query the server
4069for new groups, and subscribe the new groups as zombies."
4070  (interactive "p")
4071  (gnus-find-new-newsgroups (or arg 1))
4072  (gnus-group-list-groups))
4073
4074(defun gnus-group-edit-global-kill (&optional article group)
4075  "Edit the global kill file.
4076If GROUP, edit that local kill file instead."
4077  (interactive "P")
4078  (setq gnus-current-kill-article article)
4079  (gnus-kill-file-edit-file group)
4080  (gnus-message
4081   6
4082   (substitute-command-keys
4083    (format "Editing a %s kill file (Type \\[gnus-kill-file-exit] to exit)"
4084	    (if group "local" "global")))))
4085
4086(defun gnus-group-edit-local-kill (article group)
4087  "Edit a local kill file."
4088  (interactive (list nil (gnus-group-group-name)))
4089  (gnus-group-edit-global-kill article group))
4090
4091(defun gnus-group-force-update ()
4092  "Update `.newsrc' file."
4093  (interactive)
4094  (gnus-save-newsrc-file))
4095
4096(defvar gnus-backlog-articles)
4097
4098(defun gnus-group-suspend ()
4099  "Suspend the current Gnus session.
4100In fact, cleanup buffers except for group mode buffer.
4101The hook `gnus-suspend-gnus-hook' is called before actually suspending."
4102  (interactive)
4103  (gnus-run-hooks 'gnus-suspend-gnus-hook)
4104  (gnus-offer-save-summaries)
4105  ;; Kill Gnus buffers except for group mode buffer.
4106  (let ((group-buf (get-buffer gnus-group-buffer)))
4107    (mapcar (lambda (buf)
4108	      (unless (or (member buf (list group-buf gnus-dribble-buffer))
4109			  (progn
4110			    (save-excursion
4111			      (set-buffer buf)
4112			      (eq major-mode 'message-mode))))
4113		(gnus-kill-buffer buf)))
4114	    (gnus-buffers))
4115    (setq gnus-backlog-articles nil)
4116    (gnus-kill-gnus-frames)
4117    (when group-buf
4118      (bury-buffer group-buf)
4119      (delete-windows-on group-buf t))))
4120
4121(defun gnus-group-clear-dribble ()
4122  "Clear all information from the dribble buffer."
4123  (interactive)
4124  (gnus-dribble-clear)
4125  (gnus-message 7 "Cleared dribble buffer"))
4126
4127(defun gnus-group-exit ()
4128  "Quit reading news after updating .newsrc.eld and .newsrc.
4129The hook `gnus-exit-gnus-hook' is called before actually exiting."
4130  (interactive)
4131  (when
4132      (or noninteractive		;For gnus-batch-kill
4133	  (not gnus-interactive-exit)	;Without confirmation
4134	  gnus-expert-user
4135	  (gnus-y-or-n-p "Are you sure you want to quit reading news? "))
4136    (gnus-run-hooks 'gnus-exit-gnus-hook)
4137    ;; Offer to save data from non-quitted summary buffers.
4138    (gnus-offer-save-summaries)
4139    ;; Save the newsrc file(s).
4140    (gnus-save-newsrc-file)
4141    ;; Kill-em-all.
4142    (gnus-close-backends)
4143    ;; Reset everything.
4144    (gnus-clear-system)
4145    ;; Allow the user to do things after cleaning up.
4146    (gnus-run-hooks 'gnus-after-exiting-gnus-hook)))
4147
4148(defun gnus-group-quit ()
4149  "Quit reading news without updating .newsrc.eld or .newsrc.
4150The hook `gnus-exit-gnus-hook' is called before actually exiting."
4151  (interactive)
4152  (when (or noninteractive		;For gnus-batch-kill
4153	    (zerop (buffer-size))
4154	    (not (gnus-server-opened gnus-select-method))
4155	    gnus-expert-user
4156	    (not gnus-current-startup-file)
4157	    (gnus-yes-or-no-p
4158	     (format "Quit reading news without saving %s? "
4159		     (file-name-nondirectory gnus-current-startup-file))))
4160    (gnus-run-hooks 'gnus-exit-gnus-hook)
4161    (gnus-configure-windows 'group t)
4162    (when (and (gnus-buffer-live-p gnus-dribble-buffer)
4163	       (not (zerop (save-excursion
4164			    (set-buffer gnus-dribble-buffer)
4165			    (buffer-size)))))
4166      (gnus-dribble-enter
4167       ";;; Gnus was exited on purpose without saving the .newsrc files."))
4168    (gnus-dribble-save)
4169    (gnus-close-backends)
4170    (gnus-clear-system)
4171    (gnus-kill-buffer gnus-group-buffer)
4172    ;; Allow the user to do things after cleaning up.
4173    (gnus-run-hooks 'gnus-after-exiting-gnus-hook)))
4174
4175(defun gnus-group-describe-briefly ()
4176  "Give a one line description of the group mode commands."
4177  (interactive)
4178  (gnus-message 7 (substitute-command-keys "\\<gnus-group-mode-map>\\[gnus-group-read-group]:Select  \\[gnus-group-next-unread-group]:Forward  \\[gnus-group-prev-unread-group]:Backward  \\[gnus-group-exit]:Exit  \\[gnus-info-find-node]:Run Info  \\[gnus-group-describe-briefly]:This help")))
4179
4180(defun gnus-group-browse-foreign-server (method)
4181  "Browse a foreign news server.
4182If called interactively, this function will ask for a select method
4183 (nntp, nnspool, etc.) and a server address (eg. nntp.some.where).
4184If not, METHOD should be a list where the first element is the method
4185and the second element is the address."
4186  (interactive
4187   (list (let ((how (completing-read
4188		     "Which back end: "
4189		     (append gnus-valid-select-methods gnus-server-alist)
4190		     nil t (cons "nntp" 0) 'gnus-method-history)))
4191	   ;; We either got a back end name or a virtual server name.
4192	   ;; If the first, we also need an address.
4193	   (if (assoc how gnus-valid-select-methods)
4194	       (list (intern how)
4195		     ;; Suggested by mapjph@bath.ac.uk.
4196		     (completing-read
4197		      "Address: "
4198		      (mapcar (lambda (server) (list server))
4199			      gnus-secondary-servers)))
4200	     ;; We got a server name.
4201	     how))))
4202  (gnus-browse-foreign-server method))
4203
4204(defun gnus-group-set-info (info &optional method-only-group part)
4205  (when (or info part)
4206    (let* ((entry (gnus-gethash
4207		   (or method-only-group (gnus-info-group info))
4208		   gnus-newsrc-hashtb))
4209	   (part-info info)
4210	   (info (if method-only-group (nth 2 entry) info))
4211	   method)
4212      (when method-only-group
4213	(unless entry
4214	  (error "Trying to change non-existent group %s" method-only-group))
4215	;; We have received parts of the actual group info - either the
4216	;; select method or the group parameters.  We first check
4217	;; whether we have to extend the info, and if so, do that.
4218	(let ((len (length info))
4219	      (total (if (eq part 'method) 5 6)))
4220	  (when (< len total)
4221	    (setcdr (nthcdr (1- len) info)
4222		    (make-list (- total len) nil)))
4223	  ;; Then we enter the new info.
4224	  (setcar (nthcdr (1- total) info) part-info)))
4225      (unless entry
4226	;; This is a new group, so we just create it.
4227	(save-excursion
4228	  (set-buffer gnus-group-buffer)
4229	  (setq method (gnus-info-method info))
4230	  (when (gnus-server-equal method "native")
4231	    (setq method nil))
4232	  (save-excursion
4233	    (set-buffer gnus-group-buffer)
4234	    (if method
4235		;; It's a foreign group...
4236		(gnus-group-make-group
4237		 (gnus-group-real-name (gnus-info-group info))
4238		 (if (stringp method) method
4239		   (prin1-to-string (car method)))
4240		 (and (consp method)
4241		      (nth 1 (gnus-info-method info))))
4242	      ;; It's a native group.
4243	      (gnus-group-make-group (gnus-info-group info))))
4244	  (gnus-message 6 "Note: New group created")
4245	  (setq entry
4246		(gnus-gethash (gnus-group-prefixed-name
4247			       (gnus-group-real-name (gnus-info-group info))
4248			       (or (gnus-info-method info) gnus-select-method))
4249			      gnus-newsrc-hashtb))))
4250      ;; Whether it was a new group or not, we now have the entry, so we
4251      ;; can do the update.
4252      (if entry
4253	  (progn
4254	    (setcar (nthcdr 2 entry) info)
4255	    (when (and (not (eq (car entry) t))
4256		       (gnus-active (gnus-info-group info)))
4257	      (setcar entry (length
4258			     (gnus-list-of-unread-articles (car info))))))
4259	(error "No such group: %s" (gnus-info-group info))))))
4260
4261(defun gnus-group-set-method-info (group select-method)
4262  (gnus-group-set-info select-method group 'method))
4263
4264(defun gnus-group-set-params-info (group params)
4265  (gnus-group-set-info params group 'params))
4266
4267(defun gnus-add-marked-articles (group type articles &optional info force)
4268  ;; Add ARTICLES of TYPE to the info of GROUP.
4269  ;; If INFO is non-nil, use that info.  If FORCE is non-nil, don't
4270  ;; add, but replace marked articles of TYPE with ARTICLES.
4271  (let ((info (or info (gnus-get-info group)))
4272	marked m)
4273    (or (not info)
4274	(and (not (setq marked (nthcdr 3 info)))
4275	     (or (null articles)
4276		 (setcdr (nthcdr 2 info)
4277			 (list (list (cons type (gnus-compress-sequence
4278						 articles t)))))))
4279	(and (not (setq m (assq type (car marked))))
4280	     (or (null articles)
4281		 (setcar marked
4282			 (cons (cons type (gnus-compress-sequence articles t) )
4283			       (car marked)))))
4284	(if force
4285	    (if (null articles)
4286		(setcar (nthcdr 3 info)
4287			(gnus-delete-alist type (car marked)))
4288	      (setcdr m (gnus-compress-sequence articles t)))
4289	  (setcdr m (gnus-compress-sequence
4290		     (sort (nconc (gnus-uncompress-range (cdr m))
4291				  (copy-sequence articles)) '<) t))))))
4292
4293(defun gnus-add-mark (group mark article)
4294  "Mark ARTICLE in GROUP with MARK, whether the group is displayed or not."
4295  (let ((buffer (gnus-summary-buffer-name group)))
4296    (if (gnus-buffer-live-p buffer)
4297	(save-excursion
4298	  (set-buffer (get-buffer buffer))
4299	  (gnus-summary-add-mark article mark))
4300      (gnus-add-marked-articles group (cdr (assq mark gnus-article-mark-lists))
4301				(list article)))))
4302
4303;;;
4304;;; Group timestamps
4305;;;
4306
4307(defun gnus-group-set-timestamp ()
4308  "Change the timestamp of the current group to the current time.
4309This function can be used in hooks like `gnus-select-group-hook'
4310or `gnus-group-catchup-group-hook'."
4311  (when gnus-newsgroup-name
4312    (let ((time (current-time)))
4313      (setcdr (cdr time) nil)
4314      (gnus-group-set-parameter gnus-newsgroup-name 'timestamp time))))
4315
4316(defsubst gnus-group-timestamp (group)
4317  "Return the timestamp for GROUP."
4318  (gnus-group-get-parameter group 'timestamp t))
4319
4320(defun gnus-group-timestamp-delta (group)
4321  "Return the offset in seconds from the timestamp for GROUP to the current time, as a floating point number."
4322  (let* ((time (or (gnus-group-timestamp group)
4323		   (list 0 0)))
4324	 (delta (subtract-time (current-time) time)))
4325    (+ (* (nth 0 delta) 65536.0)
4326       (nth 1 delta))))
4327
4328(defun gnus-group-timestamp-string (group)
4329  "Return a string of the timestamp for GROUP."
4330  (let ((time (gnus-group-timestamp group)))
4331    (if (not time)
4332	""
4333      (gnus-time-iso8601 time))))
4334
4335(defun gnus-group-list-cached (level &optional lowest)
4336  "List all groups with cached articles.
4337If the prefix LEVEL is non-nil, it should be a number that says which
4338level to cut off listing groups.
4339If LOWEST, don't list groups with level lower than LOWEST.
4340
4341This command may read the active file."
4342  (interactive "P")
4343  (when level
4344    (setq level (prefix-numeric-value level)))
4345  (when (or (not level) (>= level gnus-level-zombie))
4346    (gnus-cache-open))
4347  (funcall gnus-group-prepare-function
4348	   (or level gnus-level-subscribed)
4349	   #'(lambda (info)
4350	       (let ((marks (gnus-info-marks info)))
4351		 (assq 'cache marks)))
4352	   lowest
4353	   #'(lambda (group)
4354	       (or (gnus-gethash group
4355				 gnus-cache-active-hashtb)
4356		   ;; Cache active file might use "."
4357		   ;; instead of ":".
4358		   (gnus-gethash
4359		    (mapconcat 'identity
4360			       (split-string group ":")
4361			       ".")
4362		    gnus-cache-active-hashtb))))
4363  (goto-char (point-min))
4364  (gnus-group-position-point))
4365
4366(defun gnus-group-list-dormant (level &optional lowest)
4367  "List all groups with dormant articles.
4368If the prefix LEVEL is non-nil, it should be a number that says which
4369level to cut off listing groups.
4370If LOWEST, don't list groups with level lower than LOWEST.
4371
4372This command may read the active file."
4373  (interactive "P")
4374  (when level
4375    (setq level (prefix-numeric-value level)))
4376  (when (or (not level) (>= level gnus-level-zombie))
4377    (gnus-cache-open))
4378  (funcall gnus-group-prepare-function
4379	   (or level gnus-level-subscribed)
4380	   #'(lambda (info)
4381	       (let ((marks (gnus-info-marks info)))
4382		 (assq 'dormant marks)))
4383	   lowest
4384	   'ignore)
4385  (goto-char (point-min))
4386  (gnus-group-position-point))
4387
4388(defun gnus-group-listed-groups ()
4389  "Return a list of listed groups."
4390  (let (point groups)
4391    (goto-char (point-min))
4392    (while (setq point (text-property-not-all (point) (point-max)
4393					      'gnus-group nil))
4394      (goto-char point)
4395      (push (symbol-name (get-text-property point 'gnus-group)) groups)
4396      (forward-char 1))
4397    groups))
4398
4399(defun gnus-group-list-plus (&optional args)
4400  "List groups plus the current selection."
4401  (interactive "P")
4402  (let ((gnus-group-listed-groups (gnus-group-listed-groups))
4403	(gnus-group-list-mode gnus-group-list-mode) ;; Save it.
4404	func)
4405    (push last-command-event unread-command-events)
4406    (if (featurep 'xemacs)
4407	(push (make-event 'key-press '(key ?A)) unread-command-events)
4408      (push ?A unread-command-events))
4409    (let (gnus-pick-mode keys)
4410      (setq keys (if (featurep 'xemacs)
4411		     (events-to-keys (read-key-sequence nil))
4412		   (read-key-sequence nil)))
4413      (setq func (lookup-key (current-local-map) keys)))
4414    (if (or (not func)
4415	    (numberp func))
4416	(ding)
4417      (call-interactively func))))
4418
4419(defun gnus-group-list-flush (&optional args)
4420  "Flush groups from the current selection."
4421  (interactive "P")
4422  (let ((gnus-group-list-option 'flush))
4423    (gnus-group-list-plus args)))
4424
4425(defun gnus-group-list-limit (&optional args)
4426  "List groups limited within the current selection."
4427  (interactive "P")
4428  (let ((gnus-group-list-option 'limit))
4429    (gnus-group-list-plus args)))
4430
4431(defun gnus-group-mark-article-read (group article)
4432  "Mark ARTICLE read."
4433  (let ((buffer (gnus-summary-buffer-name group))
4434	(mark gnus-read-mark)
4435	active n)
4436    (if (get-buffer buffer)
4437	(with-current-buffer buffer
4438	  (setq active gnus-newsgroup-active)
4439	  (gnus-activate-group group)
4440	  (when gnus-newsgroup-prepared
4441	    (when (and gnus-newsgroup-auto-expire
4442		       (memq mark gnus-auto-expirable-marks))
4443	      (setq mark gnus-expirable-mark))
4444	    (setq mark (gnus-request-update-mark
4445			group article mark))
4446	    (gnus-mark-article-as-read article mark)
4447	    (setq gnus-newsgroup-active (gnus-active group))
4448	    (when active
4449	      (setq n (1+ (cdr active)))
4450	      (while (<= n (cdr gnus-newsgroup-active))
4451		(unless (eq n article)
4452		  (push n gnus-newsgroup-unselected))
4453		(setq n (1+ n)))
4454	      (setq gnus-newsgroup-unselected
4455		    (nreverse gnus-newsgroup-unselected)))))
4456      (gnus-activate-group group)
4457      (gnus-group-make-articles-read group (list article))
4458      (when (gnus-group-auto-expirable-p group)
4459	(gnus-add-marked-articles
4460	 group 'expire (list article))))))
4461
4462(provide 'gnus-group)
4463
4464;;; arch-tag: 2eb5440f-0bca-4091-814c-e37817536af6
4465;;; gnus-group.el ends here
4466