1 ;;; gnus-srvr.el --- virtual server support for Gnus
2 ;; Copyright (C) 1995,96 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
29 (eval-when-compile (require 'cl))
31 (defvar gnus-server-mode-hook nil
32 "Hook run in `gnus-server-mode' buffers.")
34 (defconst gnus-server-line-format " {%(%h:%w%)} %s\n"
35 "Format of server lines.
36 It works along the same lines as a normal formatting string,
37 with some simple extensions.")
39 (defvar gnus-server-mode-line-format "Gnus List of servers"
40 "The format specification for the server mode line.")
42 ;;; Internal variables.
44 (defvar gnus-inserted-opened-servers nil)
46 (defvar gnus-server-line-format-alist
52 (defvar gnus-server-mode-line-format-alist
55 (?u user-defined ?s)))
57 (defvar gnus-server-line-format-spec nil)
58 (defvar gnus-server-mode-line-format-spec nil)
59 (defvar gnus-server-killed-servers nil)
61 (defvar gnus-server-mode-map)
63 (defvar gnus-server-menu-hook nil
64 "*Hook run after the creation of the server mode menu.")
66 (defun gnus-server-make-menu-bar ()
67 (gnus-visual-turn-off-edit-menu 'server)
69 (boundp 'gnus-server-menu)
72 gnus-server-menu gnus-server-mode-map ""
74 ["Add" gnus-server-add-server t]
75 ["Browse" gnus-server-read-server t]
76 ["List" gnus-server-list-servers t]
77 ["Kill" gnus-server-kill-server t]
78 ["Yank" gnus-server-yank-server t]
79 ["Copy" gnus-server-copy-server t]
80 ["Edit" gnus-server-edit-server t]
81 ["Exit" gnus-server-exit t]
85 gnus-server-menu gnus-server-mode-map ""
87 ["Open" gnus-server-open-server t]
88 ["Close" gnus-server-close-server t]
89 ["Deny" gnus-server-deny-servers t]
90 ["Reset" gnus-server-remove-denials t]
93 (run-hooks 'gnus-server-menu-hook))))
95 (defvar gnus-server-mode-map nil)
96 (put 'gnus-server-mode 'mode-class 'special)
98 (unless gnus-server-mode-map
99 (setq gnus-server-mode-map (make-sparse-keymap))
100 (suppress-keymap gnus-server-mode-map)
104 " " gnus-server-read-server
105 "\r" gnus-server-read-server
106 gnus-mouse-2 gnus-server-pick-server
108 "l" gnus-server-list-servers
109 "k" gnus-server-kill-server
110 "y" gnus-server-yank-server
111 "c" gnus-server-copy-server
112 "a" gnus-server-add-server
113 "e" gnus-server-edit-server
115 "O" gnus-server-open-server
116 "C" gnus-server-close-server
117 "D" gnus-server-deny-server
118 "R" gnus-server-remove-denials))
120 (defun gnus-server-mode ()
121 "Major mode for listing and editing servers.
123 All normal editing commands are switched off.
124 \\<gnus-server-mode-map>
125 For more in-depth information on this mode, read the manual
126 (`\\[gnus-info-find-node]').
128 The following commands are available:
130 \\{gnus-server-mode-map}"
132 (when (and menu-bar-mode
133 (gnus-visual-p 'server-menu 'menu))
134 (gnus-server-make-menu-bar))
135 (kill-all-local-variables)
136 (gnus-simplify-mode-line)
137 (setq major-mode 'gnus-server-mode)
138 (setq mode-name "Server")
139 ; (gnus-group-set-mode-line)
140 (setq mode-line-process nil)
141 (use-local-map gnus-server-mode-map)
142 (buffer-disable-undo (current-buffer))
143 (setq truncate-lines t)
144 (setq buffer-read-only t)
145 (run-hooks 'gnus-server-mode-hook))
147 (defun gnus-server-insert-server-line (name method)
148 (let* ((how (car method))
149 (where (nth 1 method))
150 (elem (assoc method gnus-opened-servers))
151 (status (cond ((eq (nth 1 elem) 'denied)
153 ((or (gnus-server-opened method)
154 (eq (nth 1 elem) 'ok))
163 (eval gnus-server-line-format-spec))
164 (list 'gnus-server (intern name)))))
166 (defun gnus-enter-server-buffer ()
167 "Set up the server buffer."
168 (gnus-server-setup-buffer)
169 (gnus-configure-windows 'server)
170 (gnus-server-prepare))
172 (defun gnus-server-setup-buffer ()
173 "Initialize the server buffer."
174 (unless (get-buffer gnus-server-buffer)
176 (set-buffer (get-buffer-create gnus-server-buffer))
179 (gnus-carpal-setup-buffer 'server)))))
181 (defun gnus-server-prepare ()
182 (setq gnus-server-mode-line-format-spec
183 (gnus-parse-format gnus-server-mode-line-format
184 gnus-server-mode-line-format-alist))
185 (setq gnus-server-line-format-spec
186 (gnus-parse-format gnus-server-line-format
187 gnus-server-line-format-alist t))
188 (let ((alist gnus-server-alist)
189 (buffer-read-only nil)
190 (opened gnus-opened-servers)
193 (setq gnus-inserted-opened-servers nil)
194 ;; First we do the real list of servers.
196 (push (cdr (setq server (pop alist))) done)
197 (when (and server (car server) (cdr server))
198 (gnus-server-insert-server-line (car server) (cdr server))))
199 ;; Then we insert the list of servers that have been opened in
202 (unless (member (caar opened) done)
203 (gnus-server-insert-server-line
204 (setq op-ser (format "%s:%s" (caaar opened) (nth 1 (caar opened))))
206 (push (list op-ser (caar opened)) gnus-inserted-opened-servers))
207 (setq opened (cdr opened))))
208 (goto-char (point-min))
209 (gnus-server-position-point))
211 (defun gnus-server-server-name ()
212 (let ((server (get-text-property (gnus-point-at-bol) 'gnus-server)))
213 (and server (symbol-name server))))
215 (defalias 'gnus-server-position-point 'gnus-goto-colon)
217 (defconst gnus-server-edit-buffer "*Gnus edit server*")
219 (defun gnus-server-update-server (server)
221 (set-buffer gnus-server-buffer)
222 (let* ((buffer-read-only nil)
223 (entry (assoc server gnus-server-alist)))
226 (concat "(gnus-server-set-info \"" server "\" '"
227 (prin1-to-string (cdr entry)) ")"))
228 ;; Buffer may be narrowed.
231 (when (gnus-server-goto-server server)
233 (gnus-server-insert-server-line (car entry) (cdr entry))
234 (gnus-server-position-point))))))
236 (defun gnus-server-set-info (server info)
237 ;; Enter a select method into the virtual server alist.
238 (when (and server info)
240 (concat "(gnus-server-set-info \"" server "\" '"
241 (prin1-to-string info) ")"))
242 (let* ((server (nth 1 info))
243 (entry (assoc server gnus-server-alist)))
244 (if entry (setcdr entry info)
245 (setq gnus-server-alist
246 (nconc gnus-server-alist (list (cons server info))))))))
248 ;;; Interactive server functions.
250 (defun gnus-server-kill-server (server)
251 "Kill the server on the current line."
252 (interactive (list (gnus-server-server-name)))
253 (unless (gnus-server-goto-server server)
254 (if server (error "No such server: %s" server)
255 (error "No server on the current line")))
256 (unless (assoc server gnus-server-alist)
257 (error "Read-only server %s" server))
258 (gnus-dribble-enter "")
259 (let ((buffer-read-only nil))
261 (setq gnus-server-killed-servers
262 (cons (assoc server gnus-server-alist) gnus-server-killed-servers))
263 (setq gnus-server-alist (delq (car gnus-server-killed-servers)
265 (gnus-server-position-point))
267 (defun gnus-server-yank-server ()
268 "Yank the previously killed server."
270 (or gnus-server-killed-servers
271 (error "No killed servers to be yanked"))
272 (let ((alist gnus-server-alist)
273 (server (gnus-server-server-name))
274 (killed (car gnus-server-killed-servers)))
276 (setq gnus-server-alist (nconc gnus-server-alist (list killed)))
277 (if (string= server (caar gnus-server-alist))
278 (setq gnus-server-alist (cons killed gnus-server-alist))
279 (while (and (cdr alist)
280 (not (string= server (caadr alist))))
281 (setq alist (cdr alist)))
283 (setcdr alist (cons killed (cdr alist)))
284 (setq gnus-server-alist (list killed)))))
285 (gnus-server-update-server (car killed))
286 (setq gnus-server-killed-servers (cdr gnus-server-killed-servers))
287 (gnus-server-position-point)))
289 (defun gnus-server-exit ()
290 "Return to the group buffer."
292 (kill-buffer (current-buffer))
293 (switch-to-buffer gnus-group-buffer))
295 (defun gnus-server-list-servers ()
296 "List all available servers."
298 (let ((cur (gnus-server-server-name)))
299 (gnus-server-prepare)
300 (if cur (gnus-server-goto-server cur)
301 (goto-char (point-max))
303 (gnus-server-position-point)))
305 (defun gnus-opened-servers-remove (method)
306 "Remove METHOD from the list of opened servers."
307 (setq gnus-opened-servers (delq (assoc method gnus-opened-servers)
308 gnus-opened-servers)))
310 (defun gnus-server-open-server (server)
311 "Force an open of SERVER."
312 (interactive (list (gnus-server-server-name)))
313 (let ((method (gnus-server-to-method server)))
314 (or method (error "No such server: %s" server))
315 (gnus-opened-servers-remove method)
317 (or (gnus-open-server method)
318 (progn (message "Couldn't open %s" server) nil))
319 (gnus-server-update-server server)
320 (gnus-server-position-point))))
322 (defun gnus-server-close-server (server)
324 (interactive (list (gnus-server-server-name)))
325 (let ((method (gnus-server-to-method server)))
326 (or method (error "No such server: %s" server))
327 (gnus-opened-servers-remove method)
329 (gnus-close-server method)
330 (gnus-server-update-server server)
331 (gnus-server-position-point))))
333 (defun gnus-server-deny-server (server)
334 "Make sure SERVER will never be attempted opened."
335 (interactive (list (gnus-server-server-name)))
336 (let ((method (gnus-server-to-method server)))
337 (or method (error "No such server: %s" server))
338 (gnus-opened-servers-remove method)
339 (setq gnus-opened-servers
340 (cons (list method 'denied) gnus-opened-servers)))
341 (gnus-server-update-server server)
342 (gnus-server-position-point))
344 (defun gnus-server-remove-denials ()
345 "Make all denied servers into closed servers."
347 (let ((servers gnus-opened-servers))
349 (when (eq (nth 1 (car servers)) 'denied)
350 (setcar (nthcdr 1 (car servers)) 'closed))
351 (setq servers (cdr servers))))
352 (gnus-server-list-servers))
354 (defun gnus-server-copy-server (from to)
357 (or (gnus-server-server-name)
358 (error "No server on the current line"))
359 (read-string "Copy to: ")))
360 (or from (error "No server on current line"))
361 (or (and to (not (string= to ""))) (error "No name to copy to"))
362 (and (assoc to gnus-server-alist) (error "%s already exists" to))
363 (or (assoc from gnus-server-alist)
364 (error "%s: no such server" from))
365 (let ((to-entry (gnus-copy-sequence (assoc from gnus-server-alist))))
367 (setcar (nthcdr 2 to-entry) to)
368 (setq gnus-server-killed-servers
369 (cons to-entry gnus-server-killed-servers))
370 (gnus-server-yank-server)))
372 (defun gnus-server-add-server (how where)
374 (list (intern (completing-read "Server method: "
375 gnus-valid-select-methods nil t))
376 (read-string "Server name: ")))
377 (setq gnus-server-killed-servers
378 (cons (list where how where) gnus-server-killed-servers))
379 (gnus-server-yank-server))
381 (defun gnus-server-goto-server (server)
382 "Jump to a server line."
384 (list (completing-read "Goto server: " gnus-server-alist nil t)))
385 (let ((to (text-property-any (point-min) (point-max)
386 'gnus-server (intern server))))
390 (gnus-server-position-point)))))
392 (defun gnus-server-edit-server (server)
393 "Edit the server on the current line."
394 (interactive (list (gnus-server-server-name)))
396 (error "No server on current line"))
397 (unless (assoc server gnus-server-alist)
398 (error "This server can't be edited"))
399 (let ((winconf (current-window-configuration))
400 (info (cdr (assoc server gnus-server-alist))))
401 (gnus-close-server info)
402 (get-buffer-create gnus-server-edit-buffer)
403 (gnus-configure-windows 'edit-server)
404 (gnus-add-current-to-buffer-list)
406 (make-local-variable 'gnus-prev-winconf)
407 (setq gnus-prev-winconf winconf)
408 (use-local-map (copy-keymap (current-local-map)))
409 (let ((done-func '(lambda ()
410 "Exit editing mode and update the information."
412 (gnus-server-edit-server-done 'group))))
413 (setcar (cdr (nth 4 done-func)) server)
414 (local-set-key "\C-c\C-c" done-func))
416 (insert ";; Type `C-c C-c' after you have edited the server.\n\n")
417 (insert (pp-to-string info))))
419 (defun gnus-server-edit-server-done (server)
421 (set-buffer (get-buffer-create gnus-server-edit-buffer))
422 (goto-char (point-min))
423 (let ((form (read (current-buffer)))
424 (winconf gnus-prev-winconf))
425 (gnus-server-set-info server form)
426 (kill-buffer (current-buffer))
427 (and winconf (set-window-configuration winconf))
428 (set-buffer gnus-server-buffer)
429 (gnus-server-update-server server)
430 (gnus-server-list-servers)
431 (gnus-server-position-point)))
433 (defun gnus-server-read-server (server)
435 (interactive (list (gnus-server-server-name)))
436 (let ((buf (current-buffer)))
438 (gnus-browse-foreign-server (gnus-server-to-method server) buf)
441 (gnus-server-update-server (gnus-server-server-name))
442 (gnus-server-position-point)))))
444 (defun gnus-server-pick-server (e)
447 (gnus-server-read-server (gnus-server-server-name)))
451 ;;; Browse Server Mode
454 (defvar gnus-browse-menu-hook nil
455 "*Hook run after the creation of the browse mode menu.")
457 (defvar gnus-browse-mode-hook nil)
458 (defvar gnus-browse-mode-map nil)
459 (put 'gnus-browse-mode 'mode-class 'special)
461 (unless gnus-browse-mode-map
462 (setq gnus-browse-mode-map (make-keymap))
463 (suppress-keymap gnus-browse-mode-map)
467 " " gnus-browse-read-group
468 "=" gnus-browse-select-group
469 "n" gnus-browse-next-group
470 "p" gnus-browse-prev-group
471 "\177" gnus-browse-prev-group
472 "N" gnus-browse-next-group
473 "P" gnus-browse-prev-group
474 "\M-n" gnus-browse-next-group
475 "\M-p" gnus-browse-prev-group
476 "\r" gnus-browse-select-group
477 "u" gnus-browse-unsubscribe-current-group
482 "\C-c\C-c" gnus-browse-exit
483 "?" gnus-browse-describe-briefly
484 "\C-c\C-i" gnus-info-find-node))
486 (defun gnus-browse-make-menu-bar ()
487 (gnus-visual-turn-off-edit-menu 'browse)
489 (boundp 'gnus-browse-menu)
492 gnus-browse-menu gnus-browse-mode-map ""
494 ["Subscribe" gnus-browse-unsubscribe-current-group t]
495 ["Read" gnus-browse-read-group t]
496 ["Select" gnus-browse-read-group t]
497 ["Next" gnus-browse-next-group t]
498 ["Prev" gnus-browse-next-group t]
499 ["Exit" gnus-browse-exit t]
501 (run-hooks 'gnus-browse-menu-hook))))
503 (defvar gnus-browse-current-method nil)
504 (defvar gnus-browse-return-buffer nil)
506 (defvar gnus-browse-buffer "*Gnus Browse Server*")
508 (defun gnus-browse-foreign-server (method &optional return-buffer)
509 "Browse the server METHOD."
510 (setq gnus-browse-current-method method)
511 (setq gnus-browse-return-buffer return-buffer)
512 (let ((gnus-select-method method)
514 (gnus-message 5 "Connecting to %s..." (nth 1 method))
516 ((not (gnus-check-server method))
518 1 "Unable to contact server: %s" (gnus-status-message method))
520 ((not (gnus-request-list method))
522 1 "Couldn't request list: %s" (gnus-status-message method))
525 (get-buffer-create gnus-browse-buffer)
526 (gnus-add-current-to-buffer-list)
527 (and gnus-carpal (gnus-carpal-setup-buffer 'browse))
528 (gnus-configure-windows 'browse)
529 (buffer-disable-undo (current-buffer))
530 (let ((buffer-read-only nil))
533 (setq mode-line-buffer-identification
536 "Gnus: %%b {%s:%s}" (car method) (cadr method))))
538 (set-buffer nntp-server-buffer)
539 (let ((cur (current-buffer)))
540 (goto-char (point-min))
541 (or (string= gnus-ignored-newsgroups "")
542 (delete-matching-lines gnus-ignored-newsgroups))
543 (while (re-search-forward
544 "\\(^[^ \t]+\\)[ \t]+[0-9]+[ \t]+[0-9]+" nil t)
545 (goto-char (match-end 1))
546 (setq groups (cons (cons (match-string 1)
547 (max 0 (- (1+ (read cur)) (read cur))))
549 (setq groups (sort groups
551 (string< (car l1) (car l2)))))
552 (let ((buffer-read-only nil))
554 (setq group (car groups))
556 (format "K%7d: %s\n" (cdr group) (car group)))
557 (setq groups (cdr groups))))
558 (switch-to-buffer (current-buffer))
559 (goto-char (point-min))
560 (gnus-group-position-point)
563 (defun gnus-browse-mode ()
564 "Major mode for browsing a foreign server.
566 All normal editing commands are switched off.
568 \\<gnus-browse-mode-map>
569 The only things you can do in this buffer is
571 1) `\\[gnus-browse-unsubscribe-current-group]' to subscribe to a group.
572 The group will be inserted into the group buffer upon exit from this
575 2) `\\[gnus-browse-read-group]' to read a group ephemerally.
577 3) `\\[gnus-browse-exit]' to return to the group buffer."
579 (kill-all-local-variables)
580 (when (and menu-bar-mode
581 (gnus-visual-p 'browse-menu 'menu))
582 (gnus-browse-make-menu-bar))
583 (gnus-simplify-mode-line)
584 (setq major-mode 'gnus-browse-mode)
585 (setq mode-name "Browse Server")
586 (setq mode-line-process nil)
587 (use-local-map gnus-browse-mode-map)
588 (buffer-disable-undo (current-buffer))
589 (setq truncate-lines t)
590 (setq buffer-read-only t)
591 (run-hooks 'gnus-browse-mode-hook))
593 (defun gnus-browse-read-group (&optional no-article)
594 "Enter the group at the current line."
596 (let ((group (gnus-browse-group-name)))
597 (or (gnus-group-read-ephemeral-group
598 group gnus-browse-current-method nil
599 (cons (current-buffer) 'browse))
600 (error "Couldn't enter %s" group))))
602 (defun gnus-browse-select-group ()
603 "Select the current group."
605 (gnus-browse-read-group 'no))
607 (defun gnus-browse-next-group (n)
608 "Go to the next group."
612 (gnus-group-position-point)))
614 (defun gnus-browse-prev-group (n)
615 "Go to the next group."
617 (gnus-browse-next-group (- n)))
619 (defun gnus-browse-unsubscribe-current-group (arg)
620 "(Un)subscribe to the next ARG groups."
623 (error "No group at current line."))
624 (let ((ward (if (< arg 0) -1 1))
626 (while (and (> arg 0)
628 (gnus-browse-unsubscribe-group)
629 (zerop (gnus-browse-next-group ward)))
631 (gnus-group-position-point)
632 (if (/= 0 arg) (gnus-message 7 "No more newsgroups"))
635 (defun gnus-browse-group-name ()
638 (when (re-search-forward ": \\(.*\\)$" (gnus-point-at-eol) t)
639 (gnus-group-prefixed-name (match-string 1) gnus-browse-current-method))))
641 (defun gnus-browse-unsubscribe-group ()
642 "Toggle subscription of the current group in the browse buffer."
644 (buffer-read-only nil)
648 ;; If this group it killed, then we want to subscribe it.
649 (if (= (following-char) ?K) (setq sub t))
650 (setq group (gnus-browse-group-name))
654 (gnus-group-change-level
655 (list t group gnus-level-default-subscribed
656 nil nil gnus-browse-current-method)
657 gnus-level-default-subscribed gnus-level-killed
658 (and (car (nth 1 gnus-newsrc-alist))
659 (gnus-gethash (car (nth 1 gnus-newsrc-alist))
663 (gnus-group-change-level
664 group gnus-level-killed gnus-level-default-subscribed)
668 (defun gnus-browse-exit ()
669 "Quit browsing and return to the group buffer."
671 (when (eq major-mode 'gnus-browse-mode)
672 (kill-buffer (current-buffer)))
673 ;; Insert the newly subscribed groups in the group buffer.
675 (set-buffer gnus-group-buffer)
676 (gnus-group-list-groups nil))
677 (if gnus-browse-return-buffer
678 (gnus-configure-windows 'server 'force)
679 (gnus-configure-windows 'group 'force)))
681 (defun gnus-browse-describe-briefly ()
682 "Give a one line description of the group mode commands."
685 (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")))
689 ;;; gnus-srvr.el ends here.