lisp/gnus/gnus-srvr.el

   1 ;;; gnus-srvr.el --- virtual server support for Gnus
   2
   3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   4 ;;   2004, 2005, 2006, 2007, 2008, 2009 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 3 of the License, or
  14 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (eval-when-compile (require 'cl))
  29
  30 (require 'gnus)
  31 (require 'gnus-spec)
  32 (require 'gnus-group)
  33 (require 'gnus-int)
  34 (require 'gnus-range)
  35
  36 (defcustom gnus-server-mode-hook nil
  37   "Hook run in `gnus-server-mode' buffers."
  38   :group 'gnus-server
  39   :type 'hook)
  40
  41 (defcustom gnus-server-exit-hook nil
  42   "Hook run when exiting the server buffer."
  43   :group 'gnus-server
  44   :type 'hook)
  45
  46 (defcustom gnus-server-line-format "     {%(%h:%w%)} %s%a\n"
  47   "Format of server lines.
  48 It works along the same lines as a normal formatting string,
  49 with some simple extensions.
  50
  51 The following specs are understood:
  52
  53 %h back end
  54 %n name
  55 %w address
  56 %s status
  57 %a agent covered
  58
  59 General format specifiers can also be used.
  60 See Info node `(gnus)Formatting Variables'."
  61   :link '(custom-manual "(gnus)Formatting Variables")
  62   :group 'gnus-server-visual
  63   :type 'string)
  64
  65 (defcustom gnus-server-mode-line-format "Gnus: %%b"
  66   "The format specification for the server mode line."
  67   :group 'gnus-server-visual
  68   :type 'string)
  69
  70 (defcustom gnus-server-browse-in-group-buffer nil
  71   "Whether server browsing should take place in the group buffer.
  72 If nil, a faster, but more primitive, buffer is used instead."
  73   :version "22.1"
  74   :group 'gnus-server-visual
  75   :type 'boolean)
  76
  77 ;;; Internal variables.
  78
  79 (defvar gnus-inserted-opened-servers nil)
  80
  81 (defvar gnus-server-line-format-alist
  82   `((?h gnus-tmp-how ?s)
  83     (?n gnus-tmp-name ?s)
  84     (?w gnus-tmp-where ?s)
  85     (?s gnus-tmp-status ?s)
  86     (?a gnus-tmp-agent ?s)))
  87
  88 (defvar gnus-server-mode-line-format-alist
  89   `((?S gnus-tmp-news-server ?s)
  90     (?M gnus-tmp-news-method ?s)
  91     (?u gnus-tmp-user-defined ?s)))
  92
  93 (defvar gnus-server-line-format-spec nil)
  94 (defvar gnus-server-mode-line-format-spec nil)
  95 (defvar gnus-server-killed-servers nil)
  96
  97 (defvar gnus-server-mode-map)
  98
  99 (defvar gnus-server-menu-hook nil
 100   "*Hook run after the creation of the server mode menu.")
 101
 102 (defun gnus-server-make-menu-bar ()
 103   (gnus-turn-off-edit-menu 'server)
 104   (unless (boundp 'gnus-server-server-menu)
 105     (easy-menu-define
 106      gnus-server-server-menu gnus-server-mode-map ""
 107      '("Server"
 108        ["Add..." gnus-server-add-server t]
 109        ["Browse" gnus-server-read-server t]
 110        ["Scan" gnus-server-scan-server t]
 111        ["List" gnus-server-list-servers t]
 112        ["Kill" gnus-server-kill-server t]
 113        ["Yank" gnus-server-yank-server t]
 114        ["Copy" gnus-server-copy-server t]
 115        ["Edit" gnus-server-edit-server t]
 116        ["Regenerate" gnus-server-regenerate-server t]
 117        ["Compact" gnus-server-compact-server t]
 118        ["Exit" gnus-server-exit t]))
 119
 120     (easy-menu-define
 121      gnus-server-connections-menu gnus-server-mode-map ""
 122      '("Connections"
 123        ["Open" gnus-server-open-server t]
 124        ["Close" gnus-server-close-server t]
 125        ["Offline" gnus-server-offline-server t]
 126        ["Deny" gnus-server-deny-server t]
 127        "---"
 128        ["Open All" gnus-server-open-all-servers t]
 129        ["Close All" gnus-server-close-all-servers t]
 130        ["Reset All" gnus-server-remove-denials t]))
 131
 132     (gnus-run-hooks 'gnus-server-menu-hook)))
 133
 134 (defvar gnus-server-mode-map nil)
 135 (put 'gnus-server-mode 'mode-class 'special)
 136
 137 (unless gnus-server-mode-map
 138   (setq gnus-server-mode-map (make-sparse-keymap))
 139   (suppress-keymap gnus-server-mode-map)
 140
 141   (gnus-define-keys gnus-server-mode-map
 142     " " gnus-server-read-server-in-server-buffer
 143     "\r" gnus-server-read-server
 144     gnus-mouse-2 gnus-server-pick-server
 145     "q" gnus-server-exit
 146     "l" gnus-server-list-servers
 147     "k" gnus-server-kill-server
 148     "y" gnus-server-yank-server
 149     "c" gnus-server-copy-server
 150     "a" gnus-server-add-server
 151     "e" gnus-server-edit-server
 152     "s" gnus-server-scan-server
 153
 154     "O" gnus-server-open-server
 155     "\M-o" gnus-server-open-all-servers
 156     "C" gnus-server-close-server
 157     "\M-c" gnus-server-close-all-servers
 158     "D" gnus-server-deny-server
 159     "L" gnus-server-offline-server
 160     "R" gnus-server-remove-denials
 161
 162     "n" next-line
 163     "p" previous-line
 164
 165     "g" gnus-server-regenerate-server
 166
 167     "z" gnus-server-compact-server
 168
 169     "\C-c\C-i" gnus-info-find-node
 170     "\C-c\C-b" gnus-bug))
 171
 172 (defface gnus-server-agent
 173   '((((class color) (background light)) (:foreground "PaleTurquoise" :bold t))
 174     (((class color) (background dark)) (:foreground "PaleTurquoise" :bold t))
 175     (t (:bold t)))
 176   "Face used for displaying AGENTIZED servers"
 177   :group 'gnus-server-visual)
 178 ;; backward-compatibility alias
 179 (put 'gnus-server-agent-face 'face-alias 'gnus-server-agent)
 180 (put 'gnus-server-agent-face 'obsolete-face "22.1")
 181
 182 (defface gnus-server-opened
 183   '((((class color) (background light)) (:foreground "Green3" :bold t))
 184     (((class color) (background dark)) (:foreground "Green1" :bold t))
 185     (t (:bold t)))
 186   "Face used for displaying OPENED servers"
 187   :group 'gnus-server-visual)
 188 ;; backward-compatibility alias
 189 (put 'gnus-server-opened-face 'face-alias 'gnus-server-opened)
 190 (put 'gnus-server-opened-face 'obsolete-face "22.1")
 191
 192 (defface gnus-server-closed
 193   '((((class color) (background light)) (:foreground "Steel Blue" :italic t))
 194     (((class color) (background dark))
 195      (:foreground "LightBlue" :italic t))
 196     (t (:italic t)))
 197   "Face used for displaying CLOSED servers"
 198   :group 'gnus-server-visual)
 199 ;; backward-compatibility alias
 200 (put 'gnus-server-closed-face 'face-alias 'gnus-server-closed)
 201 (put 'gnus-server-closed-face 'obsolete-face "22.1")
 202
 203 (defface gnus-server-denied
 204   '((((class color) (background light)) (:foreground "Red" :bold t))
 205     (((class color) (background dark)) (:foreground "Pink" :bold t))
 206     (t (:inverse-video t :bold t)))
 207   "Face used for displaying DENIED servers"
 208   :group 'gnus-server-visual)
 209 ;; backward-compatibility alias
 210 (put 'gnus-server-denied-face 'face-alias 'gnus-server-denied)
 211 (put 'gnus-server-denied-face 'obsolete-face "22.1")
 212
 213 (defface gnus-server-offline
 214   '((((class color) (background light)) (:foreground "Orange" :bold t))
 215     (((class color) (background dark)) (:foreground "Yellow" :bold t))
 216     (t (:inverse-video t :bold t)))
 217   "Face used for displaying OFFLINE servers"
 218   :group 'gnus-server-visual)
 219 ;; backward-compatibility alias
 220 (put 'gnus-server-offline-face 'face-alias 'gnus-server-offline)
 221 (put 'gnus-server-offline-face 'obsolete-face "22.1")
 222
 223 (defvar gnus-server-font-lock-keywords
 224   '(("(\\(agent\\))" 1 'gnus-server-agent)
 225     ("(\\(opened\\))" 1 'gnus-server-opened)
 226     ("(\\(closed\\))" 1 'gnus-server-closed)
 227     ("(\\(offline\\))" 1 'gnus-server-offline)
 228     ("(\\(denied\\))" 1 'gnus-server-denied)))
 229
 230 (defun gnus-server-mode ()
 231   "Major mode for listing and editing servers.
 232
 233 All normal editing commands are switched off.
 234 \\<gnus-server-mode-map>
 235 For more in-depth information on this mode, read the manual
 236 \(`\\[gnus-info-find-node]').
 237
 238 The following commands are available:
 239
 240 \\{gnus-server-mode-map}"
 241   (interactive)
 242   (when (gnus-visual-p 'server-menu 'menu)
 243     (gnus-server-make-menu-bar))
 244   (kill-all-local-variables)
 245   (gnus-simplify-mode-line)
 246   (setq major-mode 'gnus-server-mode)
 247   (setq mode-name "Server")
 248   (gnus-set-default-directory)
 249   (setq mode-line-process nil)
 250   (use-local-map gnus-server-mode-map)
 251   (buffer-disable-undo)
 252   (setq truncate-lines t)
 253   (setq buffer-read-only t)
 254   (if (featurep 'xemacs)
 255       (put 'gnus-server-mode 'font-lock-defaults '(gnus-server-font-lock-keywords t))
 256     (set (make-local-variable 'font-lock-defaults)
 257          '(gnus-server-font-lock-keywords t)))
 258   (gnus-run-mode-hooks 'gnus-server-mode-hook))
 259
 260 (defun gnus-server-insert-server-line (gnus-tmp-name method)
 261   (let* ((gnus-tmp-how (car method))
 262          (gnus-tmp-where (nth 1 method))
 263          (elem (assoc method gnus-opened-servers))
 264          (gnus-tmp-status
 265           (cond
 266            ((eq (nth 1 elem) 'denied) "(denied)")
 267            ((eq (nth 1 elem) 'offline) "(offline)")
 268            (t
 269             (condition-case nil
 270                 (if (or (gnus-server-opened method)
 271                         (eq (nth 1 elem) 'ok))
 272                     "(opened)"
 273                   "(closed)")
 274               ((error) "(error)")))))
 275          (gnus-tmp-agent (if (and gnus-agent
 276                                   (gnus-agent-method-p method))
 277                              " (agent)"
 278                            "")))
 279     (beginning-of-line)
 280     (gnus-add-text-properties
 281      (point)
 282      (prog1 (1+ (point))
 283        ;; Insert the text.
 284        (eval gnus-server-line-format-spec))
 285      (list 'gnus-server (intern gnus-tmp-name)
 286            'gnus-named-server (intern (gnus-method-to-server method t))))))
 287
 288 (defun gnus-enter-server-buffer ()
 289   "Set up the server buffer."
 290   (gnus-server-setup-buffer)
 291   (gnus-configure-windows 'server)
 292   ;; Usually `gnus-configure-windows' will finish with the
 293   ;; `gnus-server-buffer' selected as the current buffer, but not always (I
 294   ;; bumped into it when starting from a dedicated *Group* frame, and
 295   ;; gnus-configure-windows opened *Server* into its own dedicated frame).
 296   (with-current-buffer (get-buffer gnus-server-buffer)
 297     (gnus-server-prepare)))
 298
 299 (defun gnus-server-setup-buffer ()
 300   "Initialize the server buffer."
 301   (unless (get-buffer gnus-server-buffer)
 302     (with-current-buffer (gnus-get-buffer-create gnus-server-buffer)
 303       (gnus-server-mode)
 304       (when gnus-carpal
 305         (gnus-carpal-setup-buffer 'server)))))
 306
 307 (defun gnus-server-prepare ()
 308   (gnus-set-format 'server-mode)
 309   (gnus-set-format 'server t)
 310   (let ((alist gnus-server-alist)
 311         (buffer-read-only nil)
 312         done server op-ser)
 313     (erase-buffer)
 314     (setq gnus-inserted-opened-servers nil)
 315     ;; First we do the real list of servers.
 316     (while alist
 317       (unless (member (cdar alist) done)
 318         (push (cdar alist) done)
 319         (setq server (pop alist))
 320         (when (and server (car server) (cdr server))
 321           (gnus-server-insert-server-line (car server) (cdr server))))
 322       (when (member (cdar alist) done)
 323         (pop alist)))
 324     ;; Then we insert the list of servers that have been opened in
 325     ;; this session.
 326     (dolist (open gnus-opened-servers)
 327       (when (and (not (member (car open) done))
 328                  ;; Just ignore ephemeral servers.
 329                  (not (member (car open) gnus-ephemeral-servers)))
 330         (push (car open) done)
 331         (gnus-server-insert-server-line
 332          (setq op-ser (format "%s:%s" (caar open) (nth 1 (car open))))
 333          (car open))
 334         (push (list op-ser (car open)) gnus-inserted-opened-servers))))
 335   (goto-char (point-min))
 336   (gnus-server-position-point))
 337
 338 (defun gnus-server-server-name ()
 339   (let ((server (get-text-property (point-at-bol) 'gnus-server)))
 340     (and server (symbol-name server))))
 341
 342 (defun gnus-server-named-server ()
 343   "Return a server name that matches one of the names returned by
 344 `gnus-method-to-server'."
 345   (let ((server (get-text-property (point-at-bol) 'gnus-named-server)))
 346     (and server (symbol-name server))))
 347
 348 (defalias 'gnus-server-position-point 'gnus-goto-colon)
 349
 350 (defconst gnus-server-edit-buffer "*Gnus edit server*")
 351
 352 (defun gnus-server-update-server (server)
 353   (with-current-buffer gnus-server-buffer
 354     (let* ((buffer-read-only nil)
 355            (entry (assoc server gnus-server-alist))
 356            (oentry (assoc (gnus-server-to-method server)
 357                           gnus-opened-servers)))
 358       (when entry
 359         (gnus-dribble-enter
 360          (concat "(gnus-server-set-info \"" server "\" '"
 361                  (gnus-prin1-to-string (cdr entry)) ")\n")))
 362       (when (or entry oentry)
 363         ;; Buffer may be narrowed.
 364         (save-restriction
 365           (widen)
 366           (when (gnus-server-goto-server server)
 367             (gnus-delete-line))
 368           (if entry
 369               (gnus-server-insert-server-line (car entry) (cdr entry))
 370             (gnus-server-insert-server-line
 371              (format "%s:%s" (caar oentry) (nth 1 (car oentry)))
 372              (car oentry)))
 373           (gnus-server-position-point))))))
 374
 375 (defun gnus-server-set-info (server info)
 376   ;; Enter a select method into the virtual server alist.
 377   (when (and server info)
 378     (gnus-dribble-enter
 379      (concat "(gnus-server-set-info \"" server "\" '"
 380              (gnus-prin1-to-string info) ")"))
 381     (let* ((server (nth 1 info))
 382            (entry (assoc server gnus-server-alist))
 383            (cached (assoc server gnus-server-method-cache)))
 384       (if cached
 385           (setq gnus-server-method-cache
 386                 (delq cached gnus-server-method-cache)))
 387       (if entry
 388           (progn
 389             ;; Remove the server from `gnus-opened-servers' since
 390             ;; it has never been opened with the new `info' yet.
 391             (gnus-opened-servers-remove (cdr entry))
 392             ;; Don't make a new Lisp object.
 393             (setcar (cdr entry) (car info))
 394             (setcdr (cdr entry) (cdr info)))
 395         (setq gnus-server-alist
 396               (nconc gnus-server-alist (list (cons server info))))))))
 397
 398 ;;; Interactive server functions.
 399
 400 (defun gnus-server-kill-server (server)
 401   "Kill the server on the current line."
 402   (interactive (list (gnus-server-server-name)))
 403   (unless (gnus-server-goto-server server)
 404     (if server (error "No such server: %s" server)
 405       (error "No server on the current line")))
 406   (unless (assoc server gnus-server-alist)
 407     (error "Read-only server %s" server))
 408   (gnus-dribble-touch)
 409   (let ((buffer-read-only nil))
 410     (gnus-delete-line))
 411   (push (assoc server gnus-server-alist) gnus-server-killed-servers)
 412   (setq gnus-server-alist (delq (car gnus-server-killed-servers)
 413                                 gnus-server-alist))
 414   (let ((groups (gnus-groups-from-server server)))
 415     (when (and groups
 416                (gnus-yes-or-no-p
 417                 (format "Kill all %s groups from this server? "
 418                         (length groups))))
 419       (dolist (group groups)
 420         (setq gnus-newsrc-alist
 421               (delq (assoc group gnus-newsrc-alist)
 422                     gnus-newsrc-alist))
 423         (when gnus-group-change-level-function
 424           (funcall gnus-group-change-level-function
 425                    group gnus-level-killed 3)))))
 426   (gnus-server-position-point))
 427
 428 (defun gnus-server-yank-server ()
 429   "Yank the previously killed server."
 430   (interactive)
 431   (unless gnus-server-killed-servers
 432     (error "No killed servers to be yanked"))
 433   (let ((alist gnus-server-alist)
 434         (server (gnus-server-server-name))
 435         (killed (car gnus-server-killed-servers)))
 436     (if (not server)
 437         (setq gnus-server-alist (nconc gnus-server-alist (list killed)))
 438       (if (string= server (caar gnus-server-alist))
 439           (push killed gnus-server-alist)
 440         (while (and (cdr alist)
 441                     (not (string= server (caadr alist))))
 442           (setq alist (cdr alist)))
 443         (if alist
 444             (setcdr alist (cons killed (cdr alist)))
 445           (setq gnus-server-alist (list killed)))))
 446     (gnus-server-update-server (car killed))
 447     (setq gnus-server-killed-servers (cdr gnus-server-killed-servers))
 448     (gnus-server-position-point)))
 449
 450 (defun gnus-server-exit ()
 451   "Return to the group buffer."
 452   (interactive)
 453   (gnus-run-hooks 'gnus-server-exit-hook)
 454   (gnus-kill-buffer (current-buffer))
 455   (gnus-configure-windows 'group t))
 456
 457 (defun gnus-server-list-servers ()
 458   "List all available servers."
 459   (interactive)
 460   (let ((cur (gnus-server-server-name)))
 461     (gnus-server-prepare)
 462     (if cur (gnus-server-goto-server cur)
 463       (goto-char (point-max))
 464       (forward-line -1))
 465     (gnus-server-position-point)))
 466
 467 (defun gnus-server-set-status (method status)
 468   "Make METHOD have STATUS."
 469   (let ((entry (assoc method gnus-opened-servers)))
 470     (if entry
 471         (setcar (cdr entry) status)
 472       (push (list method status) gnus-opened-servers))))
 473
 474 (defun gnus-opened-servers-remove (method)
 475   "Remove METHOD from the list of opened servers."
 476   (setq gnus-opened-servers (delq (assoc method gnus-opened-servers)
 477                                   gnus-opened-servers)))
 478
 479 (defun gnus-server-open-server (server)
 480   "Force an open of SERVER."
 481   (interactive (list (gnus-server-server-name)))
 482   (let ((method (gnus-server-to-method server)))
 483     (unless method
 484       (error "No such server: %s" server))
 485     (gnus-server-set-status method 'ok)
 486     (prog1
 487         (or (gnus-open-server method)
 488             (progn (message "Couldn't open %s" server) nil))
 489       (gnus-server-update-server server)
 490       (gnus-server-position-point))))
 491
 492 (defun gnus-server-open-all-servers ()
 493   "Open all servers."
 494   (interactive)
 495   (dolist (server gnus-inserted-opened-servers)
 496     (gnus-server-open-server (car server))))
 497
 498 (defun gnus-server-close-server (server)
 499   "Close SERVER."
 500   (interactive (list (gnus-server-server-name)))
 501   (let ((method (gnus-server-to-method server)))
 502     (unless method
 503       (error "No such server: %s" server))
 504     (gnus-server-set-status method 'closed)
 505     (prog1
 506         (gnus-close-server method)
 507       (gnus-server-update-server server)
 508       (gnus-server-position-point))))
 509
 510 (defun gnus-server-offline-server (server)
 511   "Set SERVER to offline."
 512   (interactive (list (gnus-server-server-name)))
 513   (let ((method (gnus-server-to-method server)))
 514     (unless method
 515       (error "No such server: %s" server))
 516     (prog1
 517         (gnus-close-server method)
 518       (gnus-server-set-status method 'offline)
 519       (gnus-server-update-server server)
 520       (gnus-server-position-point))))
 521
 522 (defun gnus-server-close-all-servers ()
 523   "Close all servers."
 524   (interactive)
 525   (dolist (server gnus-inserted-opened-servers)
 526     (gnus-server-close-server (car server)))
 527   (dolist (server gnus-server-alist)
 528     (gnus-server-close-server (car server))))
 529
 530 (defun gnus-server-deny-server (server)
 531   "Make sure SERVER will never be attempted opened."
 532   (interactive (list (gnus-server-server-name)))
 533   (let ((method (gnus-server-to-method server)))
 534     (unless method
 535       (error "No such server: %s" server))
 536     (gnus-server-set-status method 'denied))
 537   (gnus-server-update-server server)
 538   (gnus-server-position-point)
 539   t)
 540
 541 (defun gnus-server-remove-denials ()
 542   "Make all denied servers into closed servers."
 543   (interactive)
 544   (dolist (server gnus-opened-servers)
 545     (when (eq (nth 1 server) 'denied)
 546       (setcar (nthcdr 1 server) 'closed)))
 547   (gnus-server-list-servers))
 548
 549 (defun gnus-server-copy-server (from to)
 550   (interactive
 551    (list
 552     (or (gnus-server-server-name)
 553         (error "No server on the current line"))
 554     (read-string "Copy to: ")))
 555   (unless from
 556     (error "No server on current line"))
 557   (unless (and to (not (string= to "")))
 558     (error "No name to copy to"))
 559   (when (assoc to gnus-server-alist)
 560     (error "%s already exists" to))
 561   (unless (gnus-server-to-method from)
 562     (error "%s: no such server" from))
 563   (let ((to-entry (cons from (gnus-copy-sequence
 564                               (gnus-server-to-method from)))))
 565     (setcar to-entry to)
 566     (setcar (nthcdr 2 to-entry) to)
 567     (push to-entry gnus-server-killed-servers)
 568     (gnus-server-yank-server)))
 569
 570 (defun gnus-server-add-server (how where)
 571   (interactive
 572    (list (intern (completing-read "Server method: "
 573                                   gnus-valid-select-methods nil t))
 574          (read-string "Server name: ")))
 575   (when (assq where gnus-server-alist)
 576     (error "Server with that name already defined"))
 577   (push (list where how where) gnus-server-killed-servers)
 578   (gnus-server-yank-server))
 579
 580 (defun gnus-server-goto-server (server)
 581   "Jump to a server line."
 582   (interactive
 583    (list (completing-read "Goto server: " gnus-server-alist nil t)))
 584   (let ((to (text-property-any (point-min) (point-max)
 585                                'gnus-server (intern server))))
 586     (when to
 587       (goto-char to)
 588       (gnus-server-position-point))))
 589
 590 (defun gnus-server-edit-server (server)
 591   "Edit the server on the current line."
 592   (interactive (list (gnus-server-server-name)))
 593   (unless server
 594     (error "No server on current line"))
 595   (unless (assoc server gnus-server-alist)
 596     (error "This server can't be edited"))
 597   (let ((info (cdr (assoc server gnus-server-alist))))
 598     (gnus-close-server info)
 599     (gnus-edit-form
 600      info "Editing the server."
 601      `(lambda (form)
 602         (gnus-server-set-info ,server form)
 603         (gnus-server-list-servers)
 604         (gnus-server-position-point))
 605      'edit-server)))
 606
 607 (defun gnus-server-scan-server (server)
 608   "Request a scan from the current server."
 609   (interactive (list (gnus-server-server-name)))
 610   (let ((method (gnus-server-to-method server)))
 611     (if (not (gnus-get-function method 'request-scan))
 612         (error "Server %s can't scan" (car method))
 613       (gnus-message 3 "Scanning %s..." server)
 614       (gnus-request-scan nil method)
 615       (gnus-message 3 "Scanning %s...done" server))))
 616
 617 (defun gnus-server-read-server-in-server-buffer (server)
 618   "Browse a server in server buffer."
 619   (interactive (list (gnus-server-server-name)))
 620   (let (gnus-server-browse-in-group-buffer)
 621     (gnus-server-read-server server)))
 622
 623 (defun gnus-server-read-server (server)
 624   "Browse a server."
 625   (interactive (list (gnus-server-server-name)))
 626   (let ((buf (current-buffer)))
 627     (prog1
 628         (gnus-browse-foreign-server server buf)
 629       (with-current-buffer buf
 630         (gnus-server-update-server (gnus-server-server-name))
 631         (gnus-server-position-point)))))
 632
 633 (defun gnus-server-pick-server (e)
 634   (interactive "e")
 635   (mouse-set-point e)
 636   (gnus-server-read-server (gnus-server-server-name)))
 637
 638 \f
 639 ;;;
 640 ;;; Browse Server Mode
 641 ;;;
 642
 643 (defvar gnus-browse-menu-hook nil
 644   "*Hook run after the creation of the browse mode menu.")
 645
 646 (defvar gnus-browse-mode-hook nil)
 647 (defvar gnus-browse-mode-map nil)
 648 (put 'gnus-browse-mode 'mode-class 'special)
 649
 650 (unless gnus-browse-mode-map
 651   (setq gnus-browse-mode-map (make-keymap))
 652   (suppress-keymap gnus-browse-mode-map)
 653
 654   (gnus-define-keys
 655       gnus-browse-mode-map
 656     " " gnus-browse-read-group
 657     "=" gnus-browse-select-group
 658     "n" gnus-browse-next-group
 659     "p" gnus-browse-prev-group
 660     "\177" gnus-browse-prev-group
 661     [delete] gnus-browse-prev-group
 662     "N" gnus-browse-next-group
 663     "P" gnus-browse-prev-group
 664     "\M-n" gnus-browse-next-group
 665     "\M-p" gnus-browse-prev-group
 666     "\r" gnus-browse-select-group
 667     "u" gnus-browse-unsubscribe-current-group
 668     "l" gnus-browse-exit
 669     "L" gnus-browse-exit
 670     "q" gnus-browse-exit
 671     "Q" gnus-browse-exit
 672     "d" gnus-browse-describe-group
 673     "\C-c\C-c" gnus-browse-exit
 674     "?" gnus-browse-describe-briefly
 675
 676     "\C-c\C-i" gnus-info-find-node
 677     "\C-c\C-b" gnus-bug))
 678
 679 (defun gnus-browse-make-menu-bar ()
 680   (gnus-turn-off-edit-menu 'browse)
 681   (unless (boundp 'gnus-browse-menu)
 682     (easy-menu-define
 683      gnus-browse-menu gnus-browse-mode-map ""
 684      '("Browse"
 685        ["Subscribe" gnus-browse-unsubscribe-current-group t]
 686        ["Read" gnus-browse-read-group t]
 687        ["Select" gnus-browse-select-group t]
 688        ["Describe" gnus-browse-describe-group t]
 689        ["Next" gnus-browse-next-group t]
 690        ["Prev" gnus-browse-prev-group t]
 691        ["Exit" gnus-browse-exit t]))
 692     (gnus-run-hooks 'gnus-browse-menu-hook)))
 693
 694 (defvar gnus-browse-current-method nil)
 695 (defvar gnus-browse-return-buffer nil)
 696
 697 (defvar gnus-browse-buffer "*Gnus Browse Server*")
 698
 699 (defun gnus-browse-foreign-server (server &optional return-buffer)
 700   "Browse the server SERVER."
 701   (setq gnus-browse-current-method (gnus-server-to-method server))
 702   (setq gnus-browse-return-buffer return-buffer)
 703   (let* ((method gnus-browse-current-method)
 704          (orig-select-method gnus-select-method)
 705          (gnus-select-method method)
 706          groups group)
 707     (gnus-message 5 "Connecting to %s..." (nth 1 method))
 708     (cond
 709      ((not (gnus-check-server method))
 710       (gnus-message
 711        1 "Unable to contact server %s: %s" (nth 1 method)
 712        (gnus-status-message method))
 713       nil)
 714      ((not
 715        (prog2
 716            (gnus-message 6 "Reading active file...")
 717            (gnus-request-list method)
 718          (gnus-message 6 "Reading active file...done")))
 719       (gnus-message
 720        1 "Couldn't request list: %s" (gnus-status-message method))
 721       nil)
 722      (t
 723       (with-current-buffer nntp-server-buffer
 724         (let ((cur (current-buffer)))
 725           (goto-char (point-min))
 726           (unless (string= gnus-ignored-newsgroups "")
 727             (delete-matching-lines gnus-ignored-newsgroups))
 728           ;; We treat NNTP as a special case to avoid problems with
 729           ;; garbage group names like `"foo' that appear in some badly
 730           ;; managed active files. -jh.
 731           (if (eq (car method) 'nntp)
 732               (while (not (eobp))
 733                 (ignore-errors
 734                   (push (cons
 735                          (mm-string-as-unibyte
 736                           (buffer-substring
 737                            (point)
 738                            (progn
 739                              (skip-chars-forward "^ \t")
 740                              (point))))
 741                          (let ((last (read cur)))
 742                            (cons (read cur) last)))
 743                         groups))
 744                 (forward-line))
 745             (while (not (eobp))
 746               (ignore-errors
 747                 (push (cons
 748                        (mm-string-as-unibyte
 749                         (if (eq (char-after) ?\")
 750                             (read cur)
 751                           (let ((p (point)) (name ""))
 752                             (skip-chars-forward "^ \t\\\\")
 753                             (setq name (buffer-substring p (point)))
 754                             (while (eq (char-after) ?\\)
 755                               (setq p (1+ (point)))
 756                               (forward-char 2)
 757                               (skip-chars-forward "^ \t\\\\")
 758                               (setq name (concat name (buffer-substring
 759                                                        p (point)))))
 760                             name)))
 761                        (let ((last (read cur)))
 762                          (cons (read cur) last)))
 763                       groups))
 764               (forward-line)))))
 765       (setq groups (sort groups
 766                          (lambda (l1 l2)
 767                            (string< (car l1) (car l2)))))
 768       (if gnus-server-browse-in-group-buffer
 769           (let* ((gnus-select-method orig-select-method)
 770                  (gnus-group-listed-groups
 771                   (mapcar (lambda (group)
 772                             (let ((name
 773                                    (gnus-group-prefixed-name
 774                                     (car group) method)))
 775                               (gnus-set-active name (cdr group))
 776                               name))
 777                           groups)))
 778             (gnus-configure-windows 'group)
 779             (funcall gnus-group-prepare-function
 780                      gnus-level-killed 'ignore 1 'ignore))
 781         (gnus-get-buffer-create gnus-browse-buffer)
 782         (when gnus-carpal
 783           (gnus-carpal-setup-buffer 'browse))
 784         (gnus-configure-windows 'browse)
 785         (buffer-disable-undo)
 786         (let ((buffer-read-only nil))
 787           (erase-buffer))
 788         (gnus-browse-mode)
 789         (setq mode-line-buffer-identification
 790               (list
 791                (format
 792                 "Gnus: %%b {%s:%s}" (car method) (cadr method))))
 793         (let ((buffer-read-only nil)
 794               name
 795               (prefix (let ((gnus-select-method orig-select-method))
 796                         (gnus-group-prefixed-name "" method))))
 797           (while (setq group (pop groups))
 798             (gnus-add-text-properties
 799              (point)
 800              (prog1 (1+ (point))
 801                (insert
 802                 (format "%c%7d: %s\n"
 803                         (let ((level
 804                                (if (string= prefix "")
 805                                    (gnus-group-level (setq name (car group)))
 806                                  (gnus-group-level
 807                                   (concat prefix (setq name (car group)))))))
 808                           (cond
 809                            ((<= level gnus-level-subscribed) ? )
 810                            ((<= level gnus-level-unsubscribed) ?U)
 811                            ((= level gnus-level-zombie) ?Z)
 812                            (t ?K)))
 813                         (max 0 (- (1+ (cddr group)) (cadr group)))
 814                         ;; Don't decode if name is ASCII
 815                         (if (and (fboundp 'detect-coding-string)
 816                                  (eq (detect-coding-string name t) 'undecided))
 817                             name
 818                           (mm-decode-coding-string
 819                            name
 820                            (inline (gnus-group-name-charset method name)))))))
 821              (list 'gnus-group name)
 822              )))
 823         (switch-to-buffer (current-buffer)))
 824       (goto-char (point-min))
 825       (gnus-group-position-point)
 826       (gnus-message 5 "Connecting to %s...done" (nth 1 method))
 827       t))))
 828
 829 (defun gnus-browse-mode ()
 830   "Major mode for browsing a foreign server.
 831
 832 All normal editing commands are switched off.
 833
 834 \\<gnus-browse-mode-map>
 835 The only things you can do in this buffer is
 836
 837 1) `\\[gnus-browse-unsubscribe-current-group]' to subscribe to a group.
 838 The group will be inserted into the group buffer upon exit from this
 839 buffer.
 840
 841 2) `\\[gnus-browse-read-group]' to read a group ephemerally.
 842
 843 3) `\\[gnus-browse-exit]' to return to the group buffer."
 844   (interactive)
 845   (kill-all-local-variables)
 846   (when (gnus-visual-p 'browse-menu 'menu)
 847     (gnus-browse-make-menu-bar))
 848   (gnus-simplify-mode-line)
 849   (setq major-mode 'gnus-browse-mode)
 850   (setq mode-name "Browse Server")
 851   (setq mode-line-process nil)
 852   (use-local-map gnus-browse-mode-map)
 853   (buffer-disable-undo)
 854   (setq truncate-lines t)
 855   (gnus-set-default-directory)
 856   (setq buffer-read-only t)
 857   (gnus-run-mode-hooks 'gnus-browse-mode-hook))
 858
 859 (defun gnus-browse-read-group (&optional no-article number)
 860   "Enter the group at the current line.
 861 If NUMBER, fetch this number of articles."
 862   (interactive "P")
 863   (let ((group (gnus-browse-group-name)))
 864     (if (or (not (gnus-get-info group))
 865             (gnus-ephemeral-group-p group))
 866         (unless (gnus-group-read-ephemeral-group
 867                  group gnus-browse-current-method nil
 868                  (cons (current-buffer) 'browse)
 869                  nil nil nil number)
 870           (error "Couldn't enter %s" group))
 871       (unless (gnus-group-read-group nil no-article group)
 872         (error "Couldn't enter %s" group)))))
 873
 874 (defun gnus-browse-select-group (&optional number)
 875   "Select the current group.
 876 If NUMBER, fetch this number of articles."
 877   (interactive "P")
 878   (gnus-browse-read-group 'no number))
 879
 880 (defun gnus-browse-next-group (n)
 881   "Go to the next group."
 882   (interactive "p")
 883   (prog1
 884       (forward-line n)
 885     (gnus-group-position-point)))
 886
 887 (defun gnus-browse-prev-group (n)
 888   "Go to the next group."
 889   (interactive "p")
 890   (gnus-browse-next-group (- n)))
 891
 892 (defun gnus-browse-unsubscribe-current-group (arg)
 893   "(Un)subscribe to the next ARG groups."
 894   (interactive "p")
 895   (when (eobp)
 896     (error "No group at current line"))
 897   (let ((ward (if (< arg 0) -1 1))
 898         (arg (abs arg)))
 899     (while (and (> arg 0)
 900                 (not (eobp))
 901                 (gnus-browse-unsubscribe-group)
 902                 (zerop (gnus-browse-next-group ward)))
 903       (decf arg))
 904     (gnus-group-position-point)
 905     (when (/= 0 arg)
 906       (gnus-message 7 "No more newsgroups"))
 907     arg))
 908
 909 (defun gnus-browse-group-name ()
 910   (save-excursion
 911     (beginning-of-line)
 912     (let ((name (get-text-property (point) 'gnus-group)))
 913       (when (re-search-forward ": \\(.*\\)$" (point-at-eol) t)
 914         (concat (gnus-method-to-server-name gnus-browse-current-method) ":"
 915                 (or name
 916                     (match-string-no-properties 1)))))))
 917
 918 (defun gnus-browse-describe-group (group)
 919   "Describe the current group."
 920   (interactive (list (gnus-browse-group-name)))
 921   (gnus-group-describe-group nil group))
 922
 923 (defun gnus-browse-unsubscribe-group ()
 924   "Toggle subscription of the current group in the browse buffer."
 925   (let ((sub nil)
 926         (buffer-read-only nil)
 927         group)
 928     (save-excursion
 929       (beginning-of-line)
 930       ;; If this group it killed, then we want to subscribe it.
 931       (unless (eq (char-after) ? )
 932         (setq sub t))
 933       (setq group (gnus-browse-group-name))
 934       (when (gnus-server-equal gnus-browse-current-method "native")
 935         (setq group (gnus-group-real-name group)))
 936       (if sub
 937           (progn
 938             ;; Make sure the group has been properly removed before we
 939             ;; subscribe to it.
 940             (if (gnus-ephemeral-group-p group)
 941                 (gnus-kill-ephemeral-group group))
 942             ;; We need to discern between killed/zombie groups and
 943             ;; just unsubscribed ones.
 944             (gnus-group-change-level
 945              (or (gnus-group-entry group)
 946                  (list t group gnus-level-default-subscribed
 947                        nil nil (if (gnus-server-equal
 948                                     gnus-browse-current-method "native")
 949                                    nil
 950                                  (gnus-method-simplify
 951                                   gnus-browse-current-method))))
 952              gnus-level-default-subscribed (gnus-group-level group)
 953              (and (car (nth 1 gnus-newsrc-alist))
 954                   (gnus-group-entry (car (nth 1 gnus-newsrc-alist))))
 955              (null (gnus-group-entry group)))
 956             (delete-char 1)
 957             (insert ? ))
 958         (gnus-group-change-level
 959          group gnus-level-unsubscribed gnus-level-default-subscribed)
 960         (delete-char 1)
 961         (insert ?U)))
 962     t))
 963
 964 (defun gnus-browse-exit ()
 965   "Quit browsing and return to the group buffer."
 966   (interactive)
 967   (when (eq major-mode 'gnus-browse-mode)
 968     (gnus-kill-buffer (current-buffer)))
 969   ;; Insert the newly subscribed groups in the group buffer.
 970   (with-current-buffer gnus-group-buffer
 971     (gnus-group-list-groups nil))
 972   (if gnus-browse-return-buffer
 973       (gnus-configure-windows 'server 'force)
 974     (gnus-configure-windows 'group 'force)))
 975
 976 (defun gnus-browse-describe-briefly ()
 977   "Give a one line description of the group mode commands."
 978   (interactive)
 979   (gnus-message 6
 980                 (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")))
 981
 982 (defun gnus-server-regenerate-server ()
 983   "Issue a command to the server to regenerate all its data structures."
 984   (interactive)
 985   (let ((server (gnus-server-server-name)))
 986     (unless server
 987       (error "No server on the current line"))
 988     (condition-case ()
 989         (gnus-get-function (gnus-server-to-method server)
 990                            'request-regenerate)
 991       (error
 992         (error "This back end doesn't support regeneration")))
 993     (gnus-message 5 "Requesting regeneration of %s..." server)
 994     (unless (gnus-open-server server)
 995       (error "Couldn't open server"))
 996     (if (gnus-request-regenerate server)
 997         (gnus-message 5 "Requesting regeneration of %s...done" server)
 998       (gnus-message 5 "Couldn't regenerate %s" server))))
 999
1000
1001 ;;;
1002 ;;; Server compaction. -- dvl
1003 ;;;
1004
1005 ;; #### FIXME: this function currently fails to update the Group buffer's
1006 ;; #### appearance.
1007 (defun gnus-server-compact-server ()
1008   "Issue a command to the server to compact all its groups.
1009
1010 Note: currently only implemented in nnml."
1011   (interactive)
1012   (let ((server (gnus-server-server-name)))
1013     (unless server
1014       (error "No server on the current line"))
1015     (condition-case ()
1016         (gnus-get-function (gnus-server-to-method server)
1017                            'request-compact)
1018       (error
1019        (error "This back end doesn't support compaction")))
1020     (gnus-message 5 "\
1021 Requesting compaction of %s... (this may take a long time)"
1022                   server)
1023     (unless (gnus-open-server server)
1024       (error "Couldn't open server"))
1025     (if (not (gnus-request-compact server))
1026         (gnus-message 5 "Couldn't compact %s" server)
1027       (gnus-message 5 "Requesting compaction of %s...done" server)
1028       ;; Invalidate the original article buffer which might be out of date.
1029       ;; #### NOTE: Yes, this might be a bit rude, but since compaction
1030       ;; #### will not happen very often, I think this is acceptable.
1031       (let ((original (get-buffer gnus-original-article-buffer)))
1032         (and original (gnus-kill-buffer original))))))
1033
1034 (provide 'gnus-srvr)
1035
1036 ;; arch-tag: c0117f64-27ca-475d-9406-8da6854c7a25
1037 ;;; gnus-srvr.el ends here