1 ;;; gnus.el --- a newsreader for GNU Emacs
2 ;; Copyright (C) 1987,88,89,90,93,94,95,96 Free Software Foundation, Inc.
4 ;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
5 ;; Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
29 (eval '(run-hooks 'gnus-load-hook))
31 (defconst gnus-version-number "0.9"
32 "Version number for this version of Gnus.")
34 (defconst gnus-version (format "Red Gnus v%s" gnus-version-number)
35 "Version string for this version of Gnus.")
37 (defvar gnus-inhibit-startup-message nil
38 "*If non-nil, the startup message will not be displayed.")
40 ;;; Internal variables
42 (defvar gnus-group-buffer "*Group*")
48 (switch-to-buffer gnus-group-buffer)
49 (let ((buffer-read-only nil))
51 (unless gnus-inhibit-startup-message
52 (gnus-group-startup-message)
55 (defun gnus-indent-rigidly (start end arg)
56 "Indent rigidly using only spaces and no tabs."
59 (narrow-to-region start end)
60 (indent-rigidly start end arg)
61 ;; We translate tabs into spaces -- not everybody uses
62 ;; an 8-character tab.
63 (goto-char (point-min))
64 (while (search-forward "\t" nil t)
65 (replace-match " " t t)))))
67 (defun gnus-group-startup-message (&optional x y)
68 "Insert startup message in current buffer."
69 ;; Insert the message.
94 (gnus-indent-rigidly (point-min) (point-max)
95 (/ (max (- (window-width) (or x 46)) 0) 2))
96 (goto-char (point-min))
98 (let* ((pheight (count-lines (point-min) (point-max)))
99 (wheight (window-height))
100 (rest (- wheight pheight)))
101 (insert (make-string (max 0 (* 2 (/ rest 3))) ?\n)))
103 (goto-char (point-min))
104 (and (search-forward "Praxis" nil t)
105 (put-text-property (match-beginning 0) (match-end 0) 'face 'bold))
106 (goto-char (point-min))
107 (setq mode-line-buffer-identification gnus-version)
108 (set-buffer-modified-p t))
119 ;; Fix by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>.
120 ;; If you want the cursor to go somewhere else, set these two
121 ;; functions in some startup hook to whatever you want.
122 (defalias 'gnus-summary-position-point 'gnus-goto-colon)
123 (defalias 'gnus-group-position-point 'gnus-goto-colon)
125 ;;; Various macros and substs.
127 (defun gnus-header-from (header)
128 (mail-header-from header))
130 (defmacro gnus-gethash (string hashtable)
131 "Get hash value of STRING in HASHTABLE."
132 `(symbol-value (intern-soft ,string ,hashtable)))
134 (defmacro gnus-sethash (string value hashtable)
135 "Set hash value. Arguments are STRING, VALUE, and HASHTABLE."
136 `(set (intern ,string ,hashtable) ,value))
138 (defmacro gnus-group-unread (group)
139 "Get the currently computed number of unread articles in GROUP."
140 `(car (gnus-gethash ,group gnus-newsrc-hashtb)))
142 (defmacro gnus-group-entry (group)
143 "Get the newsrc entry for GROUP."
144 `(gnus-gethash ,group gnus-newsrc-hashtb))
146 (defmacro gnus-active (group)
147 "Get active info on GROUP."
148 `(gnus-gethash ,group gnus-active-hashtb))
150 (defmacro gnus-set-active (group active)
151 "Set GROUP's active info."
152 `(gnus-sethash ,group ,active gnus-active-hashtb))
154 (defun gnus-alive-p ()
155 "Say whether Gnus is running or not."
156 (and gnus-group-buffer
157 (get-buffer gnus-group-buffer)
159 (set-buffer gnus-group-buffer)
160 (eq major-mode 'gnus-group-mode))))
162 ;; Info access macros.
164 (defmacro gnus-info-group (info)
166 (defmacro gnus-info-rank (info)
168 (defmacro gnus-info-read (info)
170 (defmacro gnus-info-marks (info)
172 (defmacro gnus-info-method (info)
174 (defmacro gnus-info-params (info)
177 (defmacro gnus-info-level (info)
178 `(let ((rank (gnus-info-rank ,info)))
182 (defmacro gnus-info-score (info)
183 `(let ((rank (gnus-info-rank ,info)))
184 (or (and (consp rank) (cdr rank)) 0)))
186 (defmacro gnus-info-set-group (info group)
187 `(setcar ,info ,group))
188 (defmacro gnus-info-set-rank (info rank)
189 `(setcar (nthcdr 1 ,info) ,rank))
190 (defmacro gnus-info-set-read (info read)
191 `(setcar (nthcdr 2 ,info) ,read))
192 (defmacro gnus-info-set-marks (info marks &optional extend)
194 `(gnus-info-set-entry ,info ,marks 3)
195 `(setcar (nthcdr 3 ,info) ,marks)))
196 (defmacro gnus-info-set-method (info method &optional extend)
198 `(gnus-info-set-entry ,info ,method 4)
199 `(setcar (nthcdr 4 ,info) ,method)))
200 (defmacro gnus-info-set-params (info params &optional extend)
202 `(gnus-info-set-entry ,info ,params 5)
203 `(setcar (nthcdr 5 ,info) ,params)))
205 (defun gnus-info-set-entry (info entry number)
206 ;; Extend the info until we have enough elements.
207 (while (< (length info) number)
208 (nconc info (list nil)))
210 (setcar (nthcdr number info) entry))
212 (defmacro gnus-info-set-level (info level)
213 `(let ((rank (cdr ,info)))
214 (if (consp (car rank))
215 (setcar (car rank) ,level)
216 (setcar rank ,level))))
217 (defmacro gnus-info-set-score (info score)
218 `(let ((rank (cdr ,info)))
219 (if (consp (car rank))
220 (setcdr (car rank) ,score)
221 (setcar rank (cons (car rank) ,score)))))
223 (defmacro gnus-get-info (group)
224 `(nth 2 (gnus-gethash ,group gnus-newsrc-hashtb)))
226 ;; Byte-compiler warning.
228 ;; Find out whether the gnus-visual TYPE is wanted.
229 (defun gnus-visual-p (&optional type class)
230 (and gnus-visual ; Has to be non-nil, at least.
231 (if (not type) ; We don't care about type.
233 (if (listp gnus-visual) ; It's a list, so we check it.
234 (or (memq type gnus-visual)
235 (memq class gnus-visual))
238 ;;; Load the compatability functions.
248 (defvar gnus-shutdown-alist nil)
250 (defun gnus-add-shutdown (function &rest symbols)
251 "Run FUNCTION whenever one of SYMBOLS is shut down."
252 (push (cons function symbols) gnus-shutdown-alist))
254 (defun gnus-shutdown (symbol)
255 "Shut down everything that waits for SYMBOL."
256 (let ((alist gnus-shutdown-alist)
258 (while (setq entry (pop alist))
259 (when (memq symbol (cdr entry))
260 (funcall (car entry))))))
264 ;;; Gnus Utility Functions
267 ;; Add the current buffer to the list of buffers to be killed on exit.
268 (defun gnus-add-current-to-buffer-list ()
269 (or (memq (current-buffer) gnus-buffer-list)
270 (setq gnus-buffer-list (cons (current-buffer) gnus-buffer-list))))
272 (defun gnus-version (&optional arg)
273 "Version number of this version of Gnus.
274 If ARG, insert string at point."
276 (let ((methods gnus-valid-select-methods)
279 ;; Go through all the legal select methods and add their version
280 ;; numbers to the total version string. Only the backends that are
281 ;; currently in use will have their message numbers taken into
284 (setq meth (intern (concat (caar methods) "-version")))
286 (stringp (symbol-value meth))
287 (setq mess (concat mess "; " (symbol-value meth))))
288 (setq methods (cdr methods)))
290 (insert (message mess))
293 (defun gnus-continuum-version (version)
294 "Return VERSION as a floating point number."
295 (when (or (string-match "^\\([^ ]+\\)? ?Gnus v?\\([0-9.]+\\)$" version)
296 (string-match "^\\(.?\\)gnus-\\([0-9.]+\\)$" version))
297 (let* ((alpha (and (match-beginning 1) (match-string 1 version)))
298 (number (match-string 2 version))
300 (string-match "\\([0-9]\\)\\.\\([0-9]+\\)\\.?\\([0-9]+\\)?" number)
301 (setq major (string-to-number (match-string 1 number)))
302 (setq minor (string-to-number (match-string 2 number)))
303 (setq least (if (match-beginning 3)
304 (string-to-number (match-string 3 number))
308 (format "%s00%02d%02d"
310 ((member alpha '("(ding)" "d")) "4.99")
311 ((member alpha '("September" "s")) "5.01")
312 ((member alpha '("Red" "r")) "5.03"))
314 (format "%d.%02d%02d" major minor least))))))
316 (defun gnus-info-find-node ()
317 "Find Info documentation of Gnus."
319 ;; Enlarge info window if needed.
320 (let (gnus-info-buffer)
321 (Info-goto-node (cadr (assq major-mode gnus-info-nodes)))
322 (setq gnus-info-buffer (current-buffer))
323 (gnus-configure-windows 'info)))
325 ;;; More various functions.
327 (defun gnus-group-read-only-p (&optional group)
328 "Check whether GROUP supports editing or not.
329 If GROUP is nil, `gnus-newsgroup-name' will be checked instead. Note
330 that that variable is buffer-local to the summary buffers."
331 (let ((group (or group gnus-newsgroup-name)))
332 (not (gnus-check-backend-function 'request-replace-article group))))
334 (defun gnus-group-total-expirable-p (group)
335 "Check whether GROUP is total-expirable or not."
336 (let ((params (gnus-group-find-parameter group)))
337 (or (memq 'total-expire params)
338 (cdr (assq 'total-expire params)) ; (total-expire . t)
339 (and gnus-total-expirable-newsgroups ; Check var.
340 (string-match gnus-total-expirable-newsgroups group)))))
342 (defun gnus-group-auto-expirable-p (group)
343 "Check whether GROUP is total-expirable or not."
344 (let ((params (gnus-group-find-parameter group)))
345 (or (memq 'auto-expire params)
346 (cdr (assq 'auto-expire params)) ; (auto-expire . t)
347 (and gnus-auto-expirable-newsgroups ; Check var.
348 (string-match gnus-auto-expirable-newsgroups group)))))
350 (defun gnus-virtual-group-p (group)
351 "Say whether GROUP is virtual or not."
352 (memq 'virtual (assoc (symbol-name (car (gnus-find-method-for-group group)))
353 gnus-valid-select-methods)))
355 (defun gnus-news-group-p (group &optional article)
356 "Return non-nil if GROUP (and ARTICLE) come from a news server."
357 (or (gnus-member-of-valid 'post group) ; Ordinary news group.
358 (and (gnus-member-of-valid 'post-mail group) ; Combined group.
359 (eq (gnus-request-type group article) 'news))))
361 ;; Returns a list of writable groups.
362 (defun gnus-writable-groups ()
363 (let ((alist gnus-newsrc-alist)
365 (while (setq group (car (pop alist)))
366 (unless (gnus-group-read-only-p group)
367 (push group groups)))
370 ;; Check whether to use long file names.
371 (defun gnus-use-long-file-name (symbol)
372 ;; The variable has to be set...
373 (and gnus-use-long-file-name
374 ;; If it isn't a list, then we return t.
375 (or (not (listp gnus-use-long-file-name))
376 ;; If it is a list, and the list contains `symbol', we
378 (not (memq symbol gnus-use-long-file-name)))))
380 ;; Generate a unique new group name.
381 (defun gnus-generate-new-group-name (leaf)
384 (while (gnus-gethash name gnus-newsrc-hashtb)
385 (setq name (concat leaf "<" (int-to-string (setq num (1+ num))) ">")))
388 (defun gnus-ephemeral-group-p (group)
389 "Say whether GROUP is ephemeral or not."
390 (gnus-group-get-parameter group 'quit-config))
392 (defun gnus-group-quit-config (group)
393 "Return the quit-config of GROUP."
394 (gnus-group-get-parameter group 'quit-config))
396 (defun gnus-simplify-mode-line ()
397 "Make mode lines a bit simpler."
398 (setq mode-line-modified "-- ")
399 (when (listp mode-line-format)
400 (make-local-variable 'mode-line-format)
401 (setq mode-line-format (copy-sequence mode-line-format))
402 (when (equal (nth 3 mode-line-format) " ")
403 (setcar (nthcdr 3 mode-line-format) " "))))
405 ;;; Servers and groups.
407 (defsubst gnus-server-add-address (method)
408 (let ((method-name (symbol-name (car method))))
409 (if (and (memq 'address (assoc method-name gnus-valid-select-methods))
410 (not (assq (intern (concat method-name "-address")) method)))
411 (append method (list (list (intern (concat method-name "-address"))
415 (defsubst gnus-server-get-method (group method)
416 ;; Input either a server name, and extended server name, or a
417 ;; select method, and return a select method.
418 (cond ((stringp method)
419 (gnus-server-to-method method))
420 ((equal method gnus-select-method)
422 ((and (stringp (car method)) group)
423 (gnus-server-extend-method group method))
424 ((and method (not group)
425 (equal (cadr method) ""))
428 (gnus-server-add-address method))))
430 (defun gnus-server-to-method (server)
431 "Map virtual server names to select methods."
433 ;; Is this a method, perhaps?
434 (and server (listp server) server)
435 ;; Perhaps this is the native server?
436 (and (equal server "native") gnus-select-method)
437 ;; It should be in the server alist.
438 (cdr (assoc server gnus-server-alist))
439 ;; If not, we look through all the opened server
440 ;; to see whether we can find it there.
441 (let ((opened gnus-opened-servers))
443 (not (equal server (format "%s:%s" (caaar opened)
448 (defmacro gnus-method-equal (ss1 ss2)
449 "Say whether two servers are equal."
453 (and (= (length s1) (length s2))
455 (while (and s1 (member (car s1) s2))
459 (defun gnus-server-equal (m1 m2)
460 "Say whether two methods are equal."
461 (let ((m1 (cond ((null m1) gnus-select-method)
462 ((stringp m1) (gnus-server-to-method m1))
464 (m2 (cond ((null m2) gnus-select-method)
465 ((stringp m2) (gnus-server-to-method m2))
467 (gnus-method-equal m1 m2)))
469 (defun gnus-servers-using-backend (backend)
470 "Return a list of known servers using BACKEND."
471 (let ((opened gnus-opened-servers)
474 (when (eq backend (caaar opened))
475 (push (caar opened) out))
479 (defun gnus-archive-server-wanted-p ()
480 "Say whether the user wants to use the archive server."
482 ((or (not gnus-message-archive-method)
483 (not gnus-message-archive-group))
485 ((and gnus-message-archive-method gnus-message-archive-group)
488 (let ((active (cadr (assq 'nnfolder-active-file
489 gnus-message-archive-method))))
491 (file-exists-p active))))))
493 (defun gnus-group-prefixed-name (group method)
494 "Return the whole name from GROUP and METHOD."
495 (and (stringp method) (setq method (gnus-server-to-method method)))
498 (concat (format "%s" (car method))
500 (or (assoc (format "%s" (car method))
501 (gnus-methods-using 'address))
502 (gnus-server-equal method gnus-message-archive-method))
504 (not (string= (nth 1 method) "")))
505 (concat "+" (nth 1 method)))
508 (defun gnus-group-real-prefix (group)
509 "Return the prefix of the current group name."
510 (if (string-match "^[^:]+:" group)
511 (substring group 0 (match-end 0))
514 (defun gnus-group-method (group)
515 "Return the server or method used for selecting GROUP."
516 (let ((prefix (gnus-group-real-prefix group)))
517 (if (equal prefix "")
519 (let ((servers gnus-opened-servers)
521 backend possible found)
522 (if (string-match "^[^\\+]+\\+" prefix)
523 (setq backend (intern (substring prefix 0 (1- (match-end 0))))
524 server (substring prefix (match-end 0) (1- (length prefix))))
525 (setq backend (intern (substring prefix 0 (1- (length prefix))))))
527 (when (eq (caaar servers) backend)
528 (setq possible (caar servers))
529 (when (equal (cadaar servers) server)
530 (setq found (caar servers))))
532 (or (car (rassoc found gnus-server-alist))
534 (car (rassoc possible gnus-server-alist))
536 (list backend server))))))
538 (defsubst gnus-secondary-method-p (method)
539 "Return whether METHOD is a secondary select method."
540 (let ((methods gnus-secondary-select-methods)
541 (gmethod (gnus-server-get-method nil method)))
543 (not (equal (gnus-server-get-method nil (car methods))
545 (setq methods (cdr methods)))
548 (defun gnus-group-foreign-p (group)
549 "Say whether a group is foreign or not."
550 (and (not (gnus-group-native-p group))
551 (not (gnus-group-secondary-p group))))
553 (defun gnus-group-native-p (group)
554 "Say whether the group is native or not."
555 (not (string-match ":" group)))
557 (defun gnus-group-secondary-p (group)
558 "Say whether the group is secondary or not."
559 (gnus-secondary-method-p (gnus-find-method-for-group group)))
561 (defun gnus-group-find-parameter (group &optional symbol)
562 "Return the group parameters for GROUP.
563 If SYMBOL, return the value of that symbol in the group parameters."
565 (set-buffer gnus-group-buffer)
566 (let ((parameters (funcall gnus-group-get-parameter-function group)))
568 (gnus-group-parameter-value parameters symbol)
571 (defun gnus-group-get-parameter (group &optional symbol)
572 "Return the group parameters for GROUP.
573 If SYMBOL, return the value of that symbol in the group parameters."
574 (let ((params (gnus-info-params (gnus-get-info group))))
576 (gnus-group-parameter-value params symbol)
579 (defun gnus-group-parameter-value (params symbol)
580 "Return the value of SYMBOL in group PARAMS."
581 (or (car (memq symbol params)) ; It's either a simple symbol
582 (cdr (assq symbol params)))) ; or a cons.
584 (defun gnus-group-add-parameter (group param)
585 "Add parameter PARAM to GROUP."
586 (let ((info (gnus-get-info group)))
588 () ; This is a dead group. We just ignore it.
589 ;; Cons the new param to the old one and update.
590 (gnus-group-set-info (cons param (gnus-info-params info))
593 (defun gnus-group-set-parameter (group name value)
594 "Set parameter NAME to VALUE in GROUP."
595 (let ((info (gnus-get-info group)))
597 () ; This is a dead group. We just ignore it.
598 (let ((old-params (gnus-info-params info))
599 (new-params (list (cons name value))))
601 (if (or (not (listp (car old-params)))
602 (not (eq (caar old-params) name)))
603 (setq new-params (append new-params (list (car old-params)))))
604 (setq old-params (cdr old-params)))
605 (gnus-group-set-info new-params group 'params)))))
607 (defun gnus-group-add-score (group &optional score)
608 "Add SCORE to the GROUP score.
609 If SCORE is nil, add 1 to the score of GROUP."
610 (let ((info (gnus-get-info group)))
612 (gnus-info-set-score info (+ (gnus-info-score info) (or score 1))))))
614 ;; Function written by Stainless Steel Rat <ratinox@peorth.gweep.net>
615 (defun gnus-short-group-name (group &optional levels)
616 "Collapse GROUP name LEVELS.
617 Select methods are stripped and any remote host name is stripped down to
619 (let* ((name "") (foreign "") (depth -1) (skip 1)
622 (while (string-match "\\." group skip)
623 (setq skip (match-end 0)
626 ;; separate foreign select method from group name and collapse.
627 ;; if method contains a server, collapse to non-domain server name,
628 ;; otherwise collapse to select method
629 (if (string-match ":" group)
630 (cond ((string-match "+" group)
631 (let* ((plus (string-match "+" group))
632 (colon (string-match ":" group))
633 (dot (string-match "\\." group)))
634 (setq foreign (concat
635 (substring group (+ 1 plus)
636 (cond ((null dot) colon)
637 ((< colon dot) colon)
638 ((< dot colon) dot))) ":")
639 group (substring group (+ 1 colon))
642 (let* ((colon (string-match ":" group)))
643 (setq foreign (concat (substring group 0 (+ 1 colon)))
644 group (substring group (+ 1 colon)))
646 ;; collapse group name leaving LEVELS uncollapsed elements
648 (if (and (string-match "\\." group) (> levels 0))
649 (setq name (concat name (substring group 0 1))
650 group (substring group (match-end 0))
652 name (concat name "."))
653 (setq name (concat foreign name group)
660 ;;; Kill file handling.
663 (defun gnus-apply-kill-file ()
664 "Apply a kill file to the current newsgroup.
665 Returns the number of articles marked as read."
666 (if (or (file-exists-p (gnus-newsgroup-kill-file nil))
667 (file-exists-p (gnus-newsgroup-kill-file gnus-newsgroup-name)))
668 (gnus-apply-kill-file-internal)
671 (defun gnus-kill-save-kill-buffer ()
672 (let ((file (gnus-newsgroup-kill-file gnus-newsgroup-name)))
673 (when (get-file-buffer file)
675 (set-buffer (get-file-buffer file))
676 (and (buffer-modified-p) (save-buffer))
677 (kill-buffer (current-buffer))))))
679 (defvar gnus-kill-file-name "KILL"
680 "Suffix of the kill files.")
682 (defun gnus-newsgroup-kill-file (newsgroup)
683 "Return the name of a kill file name for NEWSGROUP.
684 If NEWSGROUP is nil, return the global kill file name instead."
686 ;; The global KILL file is placed at top of the directory.
687 ((or (null newsgroup)
688 (string-equal newsgroup ""))
689 (expand-file-name gnus-kill-file-name
690 gnus-kill-files-directory))
691 ;; Append ".KILL" to newsgroup name.
692 ((gnus-use-long-file-name 'not-kill)
693 (expand-file-name (concat (gnus-newsgroup-savable-name newsgroup)
694 "." gnus-kill-file-name)
695 gnus-kill-files-directory))
696 ;; Place "KILL" under the hierarchical directory.
698 (expand-file-name (concat (gnus-newsgroup-directory-form newsgroup)
699 "/" gnus-kill-file-name)
700 gnus-kill-files-directory))))
704 (defun gnus-member-of-valid (symbol group)
705 "Find out if GROUP has SYMBOL as part of its \"valid\" spec."
707 (symbol-name (car (gnus-find-method-for-group group)))
708 gnus-valid-select-methods)))
710 (defun gnus-method-option-p (method option)
711 "Return non-nil if select METHOD has OPTION as a parameter."
712 (when (stringp method)
713 (setq method (gnus-server-to-method method)))
714 (memq option (assoc (format "%s" (car method))
715 gnus-valid-select-methods)))
717 (defun gnus-server-extend-method (group method)
718 ;; This function "extends" a virtual server. If the server is
719 ;; "hello", and the select method is ("hello" (my-var "something"))
720 ;; in the group "alt.alt", this will result in a new virtual server
721 ;; called "hello+alt.alt".
724 (if (gnus-server-equal method gnus-select-method) gnus-select-method
725 (cdr (assoc (car method) gnus-server-alist))))))
728 (setcar (cdr entry) (concat (nth 1 entry) "+" group))
729 (nconc entry (cdr method)))))
731 (defun gnus-server-status (method)
732 "Return the status of METHOD."
733 (nth 1 (assoc method gnus-opened-servers)))
735 (defun gnus-group-name-to-method (group)
736 "Return a select method suitable for GROUP."
737 (if (string-match ":" group)
738 (let ((server (substring group 0 (match-beginning 0))))
739 (if (string-match "\\+" server)
740 (list (intern (substring server 0 (match-beginning 0)))
741 (substring server (match-end 0)))
742 (list (intern server) "")))
745 (defun gnus-find-method-for-group (group &optional info)
746 "Find the select method that GROUP uses."
747 (or gnus-override-method
750 (let ((info (or info (gnus-get-info group)))
753 (not (setq method (gnus-info-method info)))
754 (equal method "native"))
757 (cond ((stringp method)
758 (gnus-server-to-method method))
759 ((stringp (car method))
760 (gnus-server-extend-method group method))
763 (cond ((equal (cadr method) "")
765 ((null (cadr method))
766 (list (car method) ""))
768 (gnus-server-add-address method)))))))
770 (defun gnus-check-backend-function (func group)
771 "Check whether GROUP supports function FUNC."
772 (let ((method (if (stringp group) (car (gnus-find-method-for-group group))
774 (fboundp (intern (format "%s-%s" method func)))))
776 (defun gnus-methods-using (feature)
777 "Find all methods that have FEATURE."
778 (let ((valids gnus-valid-select-methods)
781 (if (memq feature (car valids))
782 (setq outs (cons (car valids) outs)))
783 (setq valids (cdr valids)))
786 (defun gnus-read-method (prompt)
787 "Prompt the user for a method.
788 Allow completion over sensible values."
791 prompt (append gnus-valid-select-methods gnus-server-alist)
792 nil t nil 'gnus-method-history)))
795 (setq method gnus-select-method))
796 ((assoc method gnus-valid-select-methods)
798 (if (memq 'prompt-address
799 (assoc method gnus-valid-select-methods))
800 (read-string "Address: ")
802 ((assoc method gnus-server-alist)
807 ;;; User-level commands.
810 (defun gnus-slave-no-server (&optional arg)
811 "Read network news as a slave, without connecting to local server"
813 (gnus-no-server arg t))
816 (defun gnus-no-server (&optional arg slave)
818 If ARG is a positive number, Gnus will use that as the
819 startup level. If ARG is nil, Gnus will be started at level 2.
820 If ARG is non-nil and not a positive number, Gnus will
821 prompt the user for the name of an NNTP server to use.
822 As opposed to `gnus', this command will not connect to the local server."
824 (gnus-no-server-1 arg slave))
827 (defun gnus-slave (&optional arg)
828 "Read news as a slave."
830 (gnus arg nil 'slave))
833 (defun gnus-other-frame (&optional arg)
834 "Pop up a frame to read news."
836 (if (get-buffer gnus-group-buffer)
837 (let ((pop-up-frames t))
839 (select-frame (make-frame))
843 (defun gnus (&optional arg dont-connect slave)
845 If ARG is non-nil and a positive number, Gnus will use that as the
846 startup level. If ARG is non-nil and not a positive number, Gnus will
847 prompt the user for the name of an NNTP server to use."
849 (gnus-1 arg dont-connect slave))
851 ;; Allow redefinition of Gnus functions.
857 ;;; gnus.el ends here