summaryrefslogtreecommitdiff
path: root/lisp/gnus-srvr.el
blob: 7a29e0f75320824ea594ea6ea9f2e651163727c8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
;;; gnus-srvr.el --- virtual server support for Gnus
;; Copyright (C) 1995,96 Free Software Foundation, Inc.

;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
;; Keywords: news

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;;; Code:

(require 'gnus)
(eval-when-compile (require 'cl))

(defvar gnus-server-mode-hook nil
  "Hook run in `gnus-server-mode' buffers.")

(defconst gnus-server-line-format "     {%(%h:%w%)} %s\n"
  "Format of server lines.
It works along the same lines as a normal formatting string,
with some simple extensions.")

(defvar gnus-server-mode-line-format "Gnus  List of servers"
  "The format specification for the server mode line.")

(defvar gnus-server-exit-hook nil
  "*Hook run when exiting the server buffer.")

;;; Internal variables.

(defvar gnus-inserted-opened-servers nil)

(defvar gnus-server-line-format-alist
  `((?h how ?s)
    (?n name ?s)
    (?w where ?s)
    (?s status ?s)))

(defvar gnus-server-mode-line-format-alist 
  `((?S news-server ?s)
    (?M news-method ?s)
    (?u user-defined ?s)))

(defvar gnus-server-line-format-spec nil)
(defvar gnus-server-mode-line-format-spec nil)
(defvar gnus-server-killed-servers nil)

(defvar gnus-server-mode-map)

(defvar gnus-server-menu-hook nil
  "*Hook run after the creation of the server mode menu.")

(defun gnus-server-make-menu-bar ()
  (gnus-visual-turn-off-edit-menu 'server)
  (unless (boundp 'gnus-server-server-menu)
    (easy-menu-define
     gnus-server-server-menu gnus-server-mode-map ""
     '("Server"
       ["Add" gnus-server-add-server t]
       ["Browse" gnus-server-read-server t]
       ["List" gnus-server-list-servers t]
       ["Kill" gnus-server-kill-server t]
       ["Yank" gnus-server-yank-server t]
       ["Copy" gnus-server-copy-server t]
       ["Edit" gnus-server-edit-server t]
       ["Exit" gnus-server-exit t]
       ))

    (easy-menu-define
     gnus-server-connections-menu gnus-server-mode-map ""
     '("Connections"
       ["Open" gnus-server-open-server t]
       ["Close" gnus-server-close-server t]
       ["Deny" gnus-server-deny-server t]
       ["Reset" gnus-server-remove-denials t]
       ))

    (run-hooks 'gnus-server-menu-hook)))

(defvar gnus-server-mode-map nil)
(put 'gnus-server-mode 'mode-class 'special)

(unless gnus-server-mode-map
  (setq gnus-server-mode-map (make-sparse-keymap))
  (suppress-keymap gnus-server-mode-map)

  (gnus-define-keys
   gnus-server-mode-map
   " " gnus-server-read-server
   "\r" gnus-server-read-server
   gnus-mouse-2 gnus-server-pick-server
   "q" gnus-server-exit
   "l" gnus-server-list-servers
   "k" gnus-server-kill-server
   "y" gnus-server-yank-server
   "c" gnus-server-copy-server
   "a" gnus-server-add-server
   "e" gnus-server-edit-server

   "O" gnus-server-open-server
   "C" gnus-server-close-server
   "D" gnus-server-deny-server
   "R" gnus-server-remove-denials

    "\C-c\C-i" gnus-info-find-node))

(defun gnus-server-mode ()
  "Major mode for listing and editing servers.

All normal editing commands are switched off.
\\<gnus-server-mode-map>
For more in-depth information on this mode, read the manual 
(`\\[gnus-info-find-node]'). 

The following commands are available:

\\{gnus-server-mode-map}"
  (interactive)
  (when (and menu-bar-mode
	     (gnus-visual-p 'server-menu 'menu))
    (gnus-server-make-menu-bar))
  (kill-all-local-variables)
  (gnus-simplify-mode-line)
  (setq major-mode 'gnus-server-mode)
  (setq mode-name "Server")
					;  (gnus-group-set-mode-line)
  (setq mode-line-process nil)
  (use-local-map gnus-server-mode-map)
  (buffer-disable-undo (current-buffer))
  (setq truncate-lines t)
  (setq buffer-read-only t)
  (run-hooks 'gnus-server-mode-hook))

(defun gnus-server-insert-server-line (name method)
  (let* ((how (car method))
	 (where (nth 1 method))
	 (elem (assoc method gnus-opened-servers))
	 (status (cond ((eq (nth 1 elem) 'denied)
			"(denied)")
		       ((or (gnus-server-opened method)
			    (eq (nth 1 elem) 'ok))
			"(opened)")
		       (t
			"(closed)"))))
    (beginning-of-line)
    (gnus-add-text-properties
     (point)
     (prog1 (1+ (point))
       ;; Insert the text.
       (eval gnus-server-line-format-spec))
     (list 'gnus-server (intern name)))))

(defun gnus-enter-server-buffer ()
  "Set up the server buffer."
  (gnus-server-setup-buffer)
  (gnus-configure-windows 'server)
  (gnus-server-prepare))

(defun gnus-server-setup-buffer ()
  "Initialize the server buffer."
  (unless (get-buffer gnus-server-buffer)
    (save-excursion
      (set-buffer (get-buffer-create gnus-server-buffer))
      (gnus-server-mode)
      (when gnus-carpal 
	(gnus-carpal-setup-buffer 'server)))))

(defun gnus-server-prepare ()
  (setq gnus-server-mode-line-format-spec 
	(gnus-parse-format gnus-server-mode-line-format 
			   gnus-server-mode-line-format-alist))
  (setq gnus-server-line-format-spec 
	(gnus-parse-format gnus-server-line-format 
			   gnus-server-line-format-alist t))
  (let ((alist gnus-server-alist)
	(buffer-read-only nil)
	(opened gnus-opened-servers)
	done server op-ser)
    (erase-buffer)
    (setq gnus-inserted-opened-servers nil)
    ;; First we do the real list of servers.
    (while alist
      (push (cdr (setq server (pop alist))) done)
      (when (and server (car server) (cdr server))
	(gnus-server-insert-server-line (car server) (cdr server))))
    ;; Then we insert the list of servers that have been opened in
    ;; this session.
    (while opened 
      (unless (member (caar opened) done)
	(gnus-server-insert-server-line 
	 (setq op-ser (format "%s:%s" (caaar opened) (nth 1 (caar opened))))
	 (caar opened))
	(push (list op-ser (caar opened)) gnus-inserted-opened-servers))
      (setq opened (cdr opened))))
  (goto-char (point-min))
  (gnus-server-position-point))

(defun gnus-server-server-name ()
  (let ((server (get-text-property (gnus-point-at-bol) 'gnus-server)))
    (and server (symbol-name server))))

(defalias 'gnus-server-position-point 'gnus-goto-colon)

(defconst gnus-server-edit-buffer "*Gnus edit server*")

(defun gnus-server-update-server (server)
  (save-excursion
    (set-buffer gnus-server-buffer)
    (let* ((buffer-read-only nil)
	   (entry (assoc server gnus-server-alist))
	   (oentry (assoc (gnus-server-to-method server)
			  gnus-opened-servers)))
      (when entry
	(gnus-dribble-enter 
	 (concat "(gnus-server-set-info \"" server "\" '"
		 (prin1-to-string (cdr entry)) ")")))
      (when (or entry oentry)
	;; Buffer may be narrowed.
	(save-restriction
	  (widen)
	  (when (gnus-server-goto-server server)
	    (gnus-delete-line))
	  (if entry
	      (gnus-server-insert-server-line (car entry) (cdr entry))
	    (gnus-server-insert-server-line 
	     (format "%s:%s" (caar oentry) (nth 1 (car oentry)))
	     (car oentry)))
	  (gnus-server-position-point))))))

(defun gnus-server-set-info (server info)
  ;; Enter a select method into the virtual server alist.
  (when (and server info)
    (gnus-dribble-enter 
     (concat "(gnus-server-set-info \"" server "\" '"
	     (prin1-to-string info) ")"))
    (let* ((server (nth 1 info))
	   (entry (assoc server gnus-server-alist)))
      (if entry (setcdr entry info)
	(setq gnus-server-alist
	      (nconc gnus-server-alist (list (cons server info))))))))

;;; Interactive server functions.

(defun gnus-server-kill-server (server)
  "Kill the server on the current line."
  (interactive (list (gnus-server-server-name)))
  (unless (gnus-server-goto-server server)
    (if server (error "No such server: %s" server)
      (error "No server on the current line")))
  (unless (assoc server gnus-server-alist)
    (error "Read-only server %s" server))
  (gnus-dribble-enter "")
  (let ((buffer-read-only nil))
    (gnus-delete-line))
  (setq gnus-server-killed-servers 
	(cons (assoc server gnus-server-alist) gnus-server-killed-servers))
  (setq gnus-server-alist (delq (car gnus-server-killed-servers)
				gnus-server-alist))
  (gnus-server-position-point))

(defun gnus-server-yank-server ()
  "Yank the previously killed server."
  (interactive)
  (or gnus-server-killed-servers
      (error "No killed servers to be yanked"))
  (let ((alist gnus-server-alist)
	(server (gnus-server-server-name))
	(killed (car gnus-server-killed-servers)))
    (if (not server) 
	(setq gnus-server-alist (nconc gnus-server-alist (list killed)))
      (if (string= server (caar gnus-server-alist))
	  (setq gnus-server-alist (cons killed gnus-server-alist))
	(while (and (cdr alist)
		    (not (string= server (caadr alist))))
	  (setq alist (cdr alist)))
	(if alist
	    (setcdr alist (cons killed (cdr alist)))
 	  (setq gnus-server-alist (list killed)))))
    (gnus-server-update-server (car killed))
    (setq gnus-server-killed-servers (cdr gnus-server-killed-servers))
    (gnus-server-position-point)))

(defun gnus-server-exit ()
  "Return to the group buffer."
  (interactive)
  (kill-buffer (current-buffer))
  (switch-to-buffer gnus-group-buffer)
  (run-hooks 'gnus-server-exit-hook))

(defun gnus-server-list-servers ()
  "List all available servers."
  (interactive)
  (let ((cur (gnus-server-server-name)))
    (gnus-server-prepare)
    (if cur (gnus-server-goto-server cur)
      (goto-char (point-max))
      (forward-line -1))
    (gnus-server-position-point)))

(defun gnus-server-set-status (method status)
  "Make METHOD have STATUS."
  (let ((entry (assoc method gnus-opened-servers)))
    (if entry
	(setcar (cdr entry) status)
      (push (list method status) gnus-opened-servers))))

(defun gnus-opened-servers-remove (method)
  "Remove METHOD from the list of opened servers."
  (setq gnus-opened-servers (delq (assoc method gnus-opened-servers)
				  gnus-opened-servers)))

(defun gnus-server-open-server (server)
  "Force an open of SERVER."
  (interactive (list (gnus-server-server-name)))
  (let ((method (gnus-server-to-method server)))
    (or method (error "No such server: %s" server))
    (gnus-server-set-status method 'ok)
    (prog1
	(or (gnus-open-server method)
	    (progn (message "Couldn't open %s" server) nil))
      (gnus-server-update-server server)
      (gnus-server-position-point))))

(defun gnus-server-close-server (server)
  "Close SERVER."
  (interactive (list (gnus-server-server-name)))
  (let ((method (gnus-server-to-method server)))
    (or method (error "No such server: %s" server))
    (gnus-server-set-status method 'closed)
    (prog1
	(gnus-close-server method)
      (gnus-server-update-server server)
      (gnus-server-position-point))))

(defun gnus-server-deny-server (server)
  "Make sure SERVER will never be attempted opened."
  (interactive (list (gnus-server-server-name)))
  (let ((method (gnus-server-to-method server)))
    (or method (error "No such server: %s" server))
    (gnus-server-set-status method 'denied))
  (gnus-server-update-server server)
  (gnus-server-position-point)
  t)

(defun gnus-server-remove-denials ()
  "Make all denied servers into closed servers."
  (interactive)
  (let ((servers gnus-opened-servers))
    (while servers
      (when (eq (nth 1 (car servers)) 'denied)
	(setcar (nthcdr 1 (car servers)) 'closed))
      (setq servers (cdr servers))))
  (gnus-server-list-servers))

(defun gnus-server-copy-server (from to)
  (interactive
   (list
    (or (gnus-server-server-name)
	(error "No server on the current line"))
    (read-string "Copy to: ")))
  (or from (error "No server on current line"))
  (or (and to (not (string= to ""))) (error "No name to copy to"))
  (and (assoc to gnus-server-alist) (error "%s already exists" to))
  (or (assoc from gnus-server-alist) 
      (error "%s: no such server" from))
  (let ((to-entry (gnus-copy-sequence (assoc from gnus-server-alist))))
    (setcar to-entry to)
    (setcar (nthcdr 2 to-entry) to)
    (setq gnus-server-killed-servers 
	  (cons to-entry gnus-server-killed-servers))
    (gnus-server-yank-server)))

(defun gnus-server-add-server (how where)
  (interactive 
   (list (intern (completing-read "Server method: "
				  gnus-valid-select-methods nil t))
	 (read-string "Server name: ")))
  (setq gnus-server-killed-servers 
	(cons (list where how where) gnus-server-killed-servers))
  (gnus-server-yank-server))

(defun gnus-server-goto-server (server)
  "Jump to a server line."
  (interactive
   (list (completing-read "Goto server: " gnus-server-alist nil t)))
  (let ((to (text-property-any (point-min) (point-max) 
			       'gnus-server (intern server))))
    (and to
	 (progn
	   (goto-char to) 
	   (gnus-server-position-point)))))

(defun gnus-server-edit-server (server)
  "Edit the server on the current line."
  (interactive (list (gnus-server-server-name)))
  (unless server
    (error "No server on current line"))
  (unless (assoc server gnus-server-alist)
    (error "This server can't be edited"))
  (let ((winconf (current-window-configuration))
	(info (cdr (assoc server gnus-server-alist))))
    (gnus-close-server info)
    (get-buffer-create gnus-server-edit-buffer)
    (gnus-configure-windows 'edit-server)
    (gnus-add-current-to-buffer-list)
    (emacs-lisp-mode)
    (make-local-variable 'gnus-prev-winconf)
    (setq gnus-prev-winconf winconf)
    (use-local-map (copy-keymap (current-local-map)))
    (let ((done-func '(lambda () 
			"Exit editing mode and update the information."
			(interactive)
			(gnus-server-edit-server-done 'group))))
      (setcar (cdr (nth 4 done-func)) server)
      (local-set-key "\C-c\C-c" done-func))
    (erase-buffer)
    (insert ";; Type `C-c C-c' after you have edited the server.\n\n")
    (insert (pp-to-string info))))

(defun gnus-server-edit-server-done (server)
  (interactive)
  (set-buffer (get-buffer-create gnus-server-edit-buffer))
  (goto-char (point-min))
  (let ((form (read (current-buffer)))
	(winconf gnus-prev-winconf))
    (gnus-server-set-info server form)
    (kill-buffer (current-buffer))
    (and winconf (set-window-configuration winconf))
    (set-buffer gnus-server-buffer)
    (gnus-server-update-server server)
    (gnus-server-list-servers)
    (gnus-server-position-point)))

(defun gnus-server-read-server (server)
  "Browse a server."
  (interactive (list (gnus-server-server-name)))
  (let ((buf (current-buffer)))
    (prog1
	(gnus-browse-foreign-server (gnus-server-to-method server) buf)
      (save-excursion
	(set-buffer buf)
	(gnus-server-update-server (gnus-server-server-name))
	(gnus-server-position-point)))))
    
(defun gnus-server-pick-server (e)
  (interactive "e")
  (mouse-set-point e)
  (gnus-server-read-server (gnus-server-server-name)))


;;;
;;; Browse Server Mode
;;;

(defvar gnus-browse-menu-hook nil
  "*Hook run after the creation of the browse mode menu.")

(defvar gnus-browse-mode-hook nil)
(defvar gnus-browse-mode-map nil)
(put 'gnus-browse-mode 'mode-class 'special)

(unless gnus-browse-mode-map
  (setq gnus-browse-mode-map (make-keymap))
  (suppress-keymap gnus-browse-mode-map)

  (gnus-define-keys
   gnus-browse-mode-map
   " " gnus-browse-read-group
   "=" gnus-browse-select-group
   "n" gnus-browse-next-group
   "p" gnus-browse-prev-group
   "\177" gnus-browse-prev-group
   "N" gnus-browse-next-group
   "P" gnus-browse-prev-group
   "\M-n" gnus-browse-next-group
   "\M-p" gnus-browse-prev-group
   "\r" gnus-browse-select-group
   "u" gnus-browse-unsubscribe-current-group
   "l" gnus-browse-exit
   "L" gnus-browse-exit
   "q" gnus-browse-exit
   "Q" gnus-browse-exit
   "\C-c\C-c" gnus-browse-exit
   "?" gnus-browse-describe-briefly

   "\C-c\C-i" gnus-info-find-node))

(defun gnus-browse-make-menu-bar ()
  (gnus-visual-turn-off-edit-menu 'browse)
  (or
   (boundp 'gnus-browse-menu)
   (progn
     (easy-menu-define
      gnus-browse-menu gnus-browse-mode-map ""
      '("Browse"
	["Subscribe" gnus-browse-unsubscribe-current-group t]
	["Read" gnus-browse-read-group t]
	["Select" gnus-browse-read-group t]
	["Next" gnus-browse-next-group t]
	["Prev" gnus-browse-next-group t]
	["Exit" gnus-browse-exit t]
	))
      (run-hooks 'gnus-browse-menu-hook))))

(defvar gnus-browse-current-method nil)
(defvar gnus-browse-return-buffer nil)

(defvar gnus-browse-buffer "*Gnus Browse Server*")

(defun gnus-browse-foreign-server (method &optional return-buffer)
  "Browse the server METHOD."
  (setq gnus-browse-current-method method)
  (setq gnus-browse-return-buffer return-buffer)
  (let ((gnus-select-method method)
	groups group)
    (gnus-message 5 "Connecting to %s..." (nth 1 method))
    (cond
     ((not (gnus-check-server method))
      (gnus-message
       1 "Unable to contact server: %s" (gnus-status-message method))
      nil)
     ((not (gnus-request-list method))
      (gnus-message
       1 "Couldn't request list: %s" (gnus-status-message method))
      nil)
     (t
      (get-buffer-create gnus-browse-buffer)
      (gnus-add-current-to-buffer-list)
      (and gnus-carpal (gnus-carpal-setup-buffer 'browse))
      (gnus-configure-windows 'browse)
      (buffer-disable-undo (current-buffer))
      (let ((buffer-read-only nil))
	(erase-buffer))
      (gnus-browse-mode)
      (setq mode-line-buffer-identification
	    (list
	     (format
	      "Gnus: %%b {%s:%s}" (car method) (cadr method))))
      (save-excursion
	(set-buffer nntp-server-buffer)
	(let ((cur (current-buffer)))
	  (goto-char (point-min))
	  (or (string= gnus-ignored-newsgroups "")
	      (delete-matching-lines gnus-ignored-newsgroups))
	  (while (re-search-forward
		  "\\(^[^ \t]+\\)[ \t]+[0-9]+[ \t]+[0-9]+" nil t)
	    (goto-char (match-end 1))
	    (setq groups (cons (cons (match-string 1)
				     (max 0 (- (1+ (read cur)) (read cur))))
			       groups)))))
      (setq groups (sort groups
			 (lambda (l1 l2)
			   (string< (car l1) (car l2)))))
      (let ((buffer-read-only nil))
	(while groups
	  (setq group (car groups))
	  (insert
	   (format "K%7d: %s\n" (cdr group) (car group)))
	  (setq groups (cdr groups))))
      (switch-to-buffer (current-buffer))
      (goto-char (point-min))
      (gnus-group-position-point)
      (gnus-message 5 "Connecting to %s...done" (nth 1 method))
      t))))

(defun gnus-browse-mode ()
  "Major mode for browsing a foreign server.

All normal editing commands are switched off.

\\<gnus-browse-mode-map>
The only things you can do in this buffer is

1) `\\[gnus-browse-unsubscribe-current-group]' to subscribe to a group.
The group will be inserted into the group buffer upon exit from this
buffer.

2) `\\[gnus-browse-read-group]' to read a group ephemerally.

3) `\\[gnus-browse-exit]' to return to the group buffer."
  (interactive)
  (kill-all-local-variables)
  (when (and menu-bar-mode
	     (gnus-visual-p 'browse-menu 'menu))
    (gnus-browse-make-menu-bar))
  (gnus-simplify-mode-line)
  (setq major-mode 'gnus-browse-mode)
  (setq mode-name "Browse Server")
  (setq mode-line-process nil)
  (use-local-map gnus-browse-mode-map)
  (buffer-disable-undo (current-buffer))
  (setq truncate-lines t)
  (setq buffer-read-only t)
  (run-hooks 'gnus-browse-mode-hook))

(defun gnus-browse-read-group (&optional no-article)
  "Enter the group at the current line."
  (interactive)
  (let ((group (gnus-browse-group-name)))
    (or (gnus-group-read-ephemeral-group
	 group gnus-browse-current-method nil
	 (cons (current-buffer) 'browse))
	(error "Couldn't enter %s" group))))

(defun gnus-browse-select-group ()
  "Select the current group."
  (interactive)
  (gnus-browse-read-group 'no))

(defun gnus-browse-next-group (n)
  "Go to the next group."
  (interactive "p")
  (prog1
      (forward-line n)
    (gnus-group-position-point)))

(defun gnus-browse-prev-group (n)
  "Go to the next group."
  (interactive "p")
  (gnus-browse-next-group (- n)))

(defun gnus-browse-unsubscribe-current-group (arg)
  "(Un)subscribe to the next ARG groups."
  (interactive "p")
  (when (eobp)
    (error "No group at current line."))
  (let ((ward (if (< arg 0) -1 1))
	(arg (abs arg)))
    (while (and (> arg 0)
		(not (eobp))
		(gnus-browse-unsubscribe-group)
		(zerop (gnus-browse-next-group ward)))
      (decf arg))
    (gnus-group-position-point)
    (if (/= 0 arg) (gnus-message 7 "No more newsgroups"))
    arg))

(defun gnus-browse-group-name ()
  (save-excursion
    (beginning-of-line)
    (when (re-search-forward ": \\(.*\\)$" (gnus-point-at-eol) t)
      (gnus-group-prefixed-name (match-string 1) gnus-browse-current-method))))

(defun gnus-browse-unsubscribe-group ()
  "Toggle subscription of the current group in the browse buffer."
  (let ((sub nil)
	(buffer-read-only nil)
	group)
    (save-excursion
      (beginning-of-line)
      ;; If this group it killed, then we want to subscribe it.
      (if (= (following-char) ?K) (setq sub t))
      (setq group (gnus-browse-group-name))
      (delete-char 1)
      (if sub
	  (progn
	    (gnus-group-change-level
	     (list t group gnus-level-default-subscribed
		   nil nil gnus-browse-current-method)
	     gnus-level-default-subscribed gnus-level-killed
	     (and (car (nth 1 gnus-newsrc-alist))
		  (gnus-gethash (car (nth 1 gnus-newsrc-alist))
				gnus-newsrc-hashtb))
	     t)
	    (insert ? ))
	(gnus-group-change-level
	 group gnus-level-killed gnus-level-default-subscribed)
	(insert ?K)))
    t))

(defun gnus-browse-exit ()
  "Quit browsing and return to the group buffer."
  (interactive)
  (when (eq major-mode 'gnus-browse-mode)
    (kill-buffer (current-buffer)))
  ;; Insert the newly subscribed groups in the group buffer.
  (save-excursion
    (set-buffer gnus-group-buffer)
    (gnus-group-list-groups nil))
  (if gnus-browse-return-buffer
      (gnus-configure-windows 'server 'force)
    (gnus-configure-windows 'group 'force)))

(defun gnus-browse-describe-briefly ()
  "Give a one line description of the group mode commands."
  (interactive)
  (gnus-message 6
		(substitute-command-keys "\\<gnus-browse-mode-map>\\[gnus-group-next-group]:Forward  \\[gnus-group-prev-group]:Backward  \\[gnus-browse-exit]:Exit  \\[gnus-info-find-node]:Run Info  \\[gnus-browse-describe-briefly]:This help")))

(provide 'gnus-srvr)

;;; gnus-srvr.el ends here.