lisp/gnus/gnus.el

   1 ;;; gnus.el --- a newsreader for GNU Emacs
   2 ;; Copyright (C) 1987,88,89,90,93,94,95,96,97 Free Software Foundation, Inc.
   3
   4 ;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
   5 ;;      Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
   6 ;; Keywords: news, mail
   7
   8 ;; This file is part of GNU Emacs.
   9
  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)
  13 ;; any later version.
  14
  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.
  19
  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.
  24
  25 ;;; Commentary:
  26
  27 ;;; Code:
  28
  29 (eval '(run-hooks 'gnus-load-hook))
  30
  31 (eval-when-compile (require 'cl))
  32
  33 (require 'custom)
  34 (require 'gnus-load)
  35 (require 'message)
  36
  37 (defgroup gnus nil
  38   "The coffee-brewing, all singing, all dancing, kitchen sink newsreader."
  39   :group 'news
  40   :group 'mail)
  41
  42 (defgroup gnus-start nil
  43   "Starting your favorite newsreader."
  44   :group 'gnus)
  45
  46 (defgroup gnus-start-server nil
  47   "Server options at startup."
  48   :group 'gnus-start)
  49
  50 ;; These belong to gnus-group.el.
  51 (defgroup gnus-group nil
  52   "Group buffers."
  53   :link '(custom-manual "(gnus)The Group Buffer")
  54   :group 'gnus)
  55
  56 (defgroup gnus-group-foreign nil
  57   "Foreign groups."
  58   :link '(custom-manual "(gnus)Foreign Groups")
  59   :group 'gnus-group)
  60
  61 (defgroup gnus-group-new nil
  62   "Automatic subscription of new groups."
  63   :group 'gnus-group)
  64
  65 (defgroup gnus-group-levels nil
  66   "Group levels."
  67   :link '(custom-manual "(gnus)Group Levels")
  68   :group 'gnus-group)
  69
  70 (defgroup gnus-group-select nil
  71   "Selecting a Group."
  72   :link '(custom-manual "(gnus)Selecting a Group")
  73   :group 'gnus-group)
  74
  75 (defgroup gnus-group-listing nil
  76   "Showing slices of the group list."
  77   :link '(custom-manual "(gnus)Listing Groups")
  78   :group 'gnus-group)
  79
  80 (defgroup gnus-group-visual nil
  81   "Sorting the group buffer."
  82   :link '(custom-manual "(gnus)Group Buffer Format")
  83   :group 'gnus-group
  84   :group 'gnus-visual)
  85
  86 (defgroup gnus-group-various nil
  87   "Various group options."
  88   :link '(custom-manual "(gnus)Scanning New Messages")
  89   :group 'gnus-group)
  90
  91 ;; These belong to gnus-sum.el.
  92 (defgroup gnus-summary nil
  93   "Summary buffers."
  94   :link '(custom-manual "(gnus)The Summary Buffer")
  95   :group 'gnus)
  96
  97 (defgroup gnus-summary-exit nil
  98   "Leaving summary buffers."
  99   :link '(custom-manual "(gnus)Exiting the Summary Buffer")
 100   :group 'gnus-summary)
 101
 102 (defgroup gnus-summary-marks nil
 103   "Marks used in summary buffers."
 104   :link '(custom-manual "(gnus)Marking Articles")
 105   :group 'gnus-summary)
 106
 107 (defgroup gnus-thread nil
 108   "Ordering articles according to replies."
 109   :link '(custom-manual "(gnus)Threading")
 110   :group 'gnus-summary)
 111
 112 (defgroup gnus-summary-format nil
 113   "Formatting of the summary buffer."
 114   :link '(custom-manual "(gnus)Summary Buffer Format")
 115   :group 'gnus-summary)
 116
 117 (defgroup gnus-summary-choose nil
 118   "Choosing Articles."
 119   :link '(custom-manual "(gnus)Choosing Articles")
 120   :group 'gnus-summary)
 121
 122 (defgroup gnus-summary-maneuvering nil
 123   "Summary movement commands."
 124   :link '(custom-manual "(gnus)Summary Maneuvering")
 125   :group 'gnus-summary)
 126
 127 (defgroup gnus-summary-mail nil
 128   "Mail group commands."
 129   :link '(custom-manual "(gnus)Mail Group Commands")
 130   :group 'gnus-summary)
 131
 132 (defgroup gnus-summary-sort nil
 133   "Sorting the summary buffer."
 134   :link '(custom-manual "(gnus)Sorting")
 135   :group 'gnus-summary)
 136
 137 (defgroup gnus-summary-visual nil
 138   "Highlighting and menus in the summary buffer."
 139   :link '(custom-manual "(gnus)Summary Highlighting")
 140   :group 'gnus-visual
 141   :group 'gnus-summary)
 142
 143 (defgroup gnus-summary-various nil
 144   "Various summary buffer options."
 145   :link '(custom-manual "(gnus)Various Summary Stuff")
 146   :group 'gnus-summary)
 147
 148 ;; Belongs to gnus-uu.el
 149 (defgroup gnus-extract-view nil
 150   "Viewing extracted files."
 151   :link '(custom-manual "(gnus)Viewing Files")
 152   :group 'gnus-extract)
 153
 154 ;; Belongs to gnus-score.el
 155 (defgroup gnus-score nil
 156   "Score and kill file handling."
 157   :group 'gnus)
 158
 159 (defgroup gnus-score-kill nil
 160   "Kill files."
 161   :group 'gnus-score)
 162
 163 (defgroup gnus-score-adapt nil
 164   "Adaptive score files."
 165   :group 'gnus-score)
 166
 167 (defgroup gnus-score-default nil
 168   "Default values for score files."
 169   :group 'gnus-score)
 170
 171 (defgroup gnus-score-expire nil
 172   "Expiring score rules."
 173   :group 'gnus-score)
 174
 175 (defgroup gnus-score-decay nil
 176   "Decaying score rules."
 177   :group 'gnus-score)
 178
 179 (defgroup gnus-score-files nil
 180   "Score and kill file names."
 181   :group 'gnus-score
 182   :group 'gnus-files)
 183
 184 (defgroup gnus-score-various nil
 185   "Various scoring and killing options."
 186   :group 'gnus-score)
 187
 188 ;; Other
 189 (defgroup gnus-visual nil
 190   "Options controling the visual fluff."
 191   :group 'gnus
 192   :group 'faces)
 193
 194 (defgroup gnus-files nil
 195   "Files used by Gnus."
 196   :group 'gnus)
 197
 198 (defgroup gnus-dribble-file nil
 199   "Auto save file."
 200   :link '(custom-manual "(gnus)Auto Save")
 201   :group 'gnus-files)
 202
 203 (defgroup gnus-newsrc nil
 204   "Storing Gnus state."
 205   :group 'gnus-files)
 206
 207 (defgroup gnus-server nil
 208   "Options related to newsservers and other servers used by Gnus."
 209   :group 'gnus)
 210
 211 (defgroup gnus-message '((message custom-group))
 212   "Composing replies and followups in Gnus."
 213   :group 'gnus)
 214
 215 (defgroup gnus-meta nil
 216   "Meta variables controling major portions of Gnus.
 217 In general, modifying these variables does not take affect until Gnus
 218 is restarted, and sometimes reloaded."
 219   :group 'gnus)
 220
 221 (defgroup gnus-various nil
 222   "Other Gnus options."
 223   :link '(custom-manual "(gnus)Various Various")
 224   :group 'gnus)
 225
 226 (defgroup gnus-exit nil
 227   "Exiting gnus."
 228   :link '(custom-manual "(gnus)Exiting Gnus")
 229   :group 'gnus)
 230
 231 (defconst gnus-version-number "5.5"
 232   "Version number for this version of Gnus.")
 233
 234 (defconst gnus-version (format "Gnus v%s" gnus-version-number)
 235   "Version string for this version of Gnus.")
 236
 237 (defcustom gnus-inhibit-startup-message nil
 238   "If non-nil, the startup message will not be displayed.
 239 This variable is used before `.gnus.el' is loaded, so it should
 240 be set in `.emacs' instead."
 241   :group 'gnus-start
 242   :type 'boolean)
 243
 244 (defcustom gnus-play-startup-jingle nil
 245   "If non-nil, play the Gnus jingle at startup."
 246   :group 'gnus-start
 247   :type 'boolean)
 248
 249 ;;; Kludges to help the transition from the old `custom.el'.
 250
 251 (unless (featurep 'gnus-xmas)
 252   (defalias 'gnus-make-overlay 'make-overlay)
 253   (defalias 'gnus-overlay-put 'overlay-put)
 254   (defalias 'gnus-move-overlay 'move-overlay)
 255   (defalias 'gnus-overlay-end 'overlay-end)
 256   (defalias 'gnus-extent-detached-p 'ignore)
 257   (defalias 'gnus-extent-start-open 'ignore)
 258   (defalias 'gnus-set-text-properties 'set-text-properties)
 259   (defalias 'gnus-group-remove-excess-properties 'ignore)
 260   (defalias 'gnus-topic-remove-excess-properties 'ignore)
 261   (defalias 'gnus-appt-select-lowest-window 'appt-select-lowest-window)
 262   (defalias 'gnus-mail-strip-quoted-names 'mail-strip-quoted-names)
 263   (defalias 'gnus-character-to-event 'identity)
 264   (defalias 'gnus-add-text-properties 'add-text-properties)
 265   (defalias 'gnus-put-text-property 'put-text-property)
 266   (defalias 'gnus-mode-line-buffer-identification 'identity)
 267   (defalias 'gnus-characterp 'numberp)
 268   (defalias 'gnus-key-press-event-p 'numberp))
 269
 270 ;; The XEmacs people think this is evil, so it must go.
 271 (defun custom-face-lookup (&optional fg bg stipple bold italic underline)
 272   "Lookup or create a face with specified attributes."
 273   (let ((name (intern (format "custom-face-%s-%s-%s-%S-%S-%S"
 274                               (or fg "default")
 275                               (or bg "default")
 276                               (or stipple "default")
 277                               bold italic underline))))
 278     (if (and (custom-facep name)
 279              (fboundp 'make-face))
 280         ()
 281       (copy-face 'default name)
 282       (when (and fg
 283                  (not (string-equal fg "default")))
 284         (ignore-errors
 285           (set-face-foreground name fg)))
 286       (when (and bg
 287                  (not (string-equal bg "default")))
 288         (ignore-errors
 289           (set-face-background name bg)))
 290       (when (and stipple
 291                  (not (string-equal stipple "default"))
 292                  (not (eq stipple 'custom:asis))
 293                  (fboundp 'set-face-stipple))
 294         (set-face-stipple name stipple))
 295       (when (and bold
 296                  (not (eq bold 'custom:asis)))
 297         (ignore-errors
 298           (make-face-bold name)))
 299       (when (and italic
 300                  (not (eq italic 'custom:asis)))
 301         (ignore-errors
 302           (make-face-italic name)))
 303       (when (and underline
 304                  (not (eq underline 'custom:asis)))
 305         (ignore-errors
 306           (set-face-underline-p name t))))
 307     name))
 308
 309 ;; We define these group faces here to avoid the display
 310 ;; update forced when creating new faces.
 311
 312 (defface gnus-group-news-1-face
 313   '((((class color)
 314       (background dark))
 315      (:foreground "PaleTurquoise" :bold t))
 316     (((class color)
 317       (background light))
 318      (:foreground "ForestGreen" :bold t))
 319     (t
 320      ()))
 321   "Level 1 newsgroup face.")
 322
 323 (defface gnus-group-news-1-empty-face
 324   '((((class color)
 325       (background dark))
 326      (:foreground "PaleTurquoise"))
 327     (((class color)
 328       (background light))
 329      (:foreground "ForestGreen"))
 330     (t
 331      ()))
 332   "Level 1 empty newsgroup face.")
 333
 334 (defface gnus-group-news-2-face
 335   '((((class color)
 336       (background dark))
 337      (:foreground "turquoise" :bold t))
 338     (((class color)
 339       (background light))
 340      (:foreground "CadetBlue4" :bold t))
 341     (t
 342      ()))
 343   "Level 2 newsgroup face.")
 344
 345 (defface gnus-group-news-2-empty-face
 346   '((((class color)
 347       (background dark))
 348      (:foreground "turquoise"))
 349     (((class color)
 350       (background light))
 351      (:foreground "CadetBlue4"))
 352     (t
 353      ()))
 354   "Level 2 empty newsgroup face.")
 355
 356 (defface gnus-group-news-3-face
 357   '((((class color)
 358       (background dark))
 359      (:bold t))
 360     (((class color)
 361       (background light))
 362      (:bold t))
 363     (t
 364      ()))
 365   "Level 3 newsgroup face.")
 366
 367 (defface gnus-group-news-3-empty-face
 368   '((((class color)
 369       (background dark))
 370      ())
 371     (((class color)
 372       (background light))
 373      ())
 374     (t
 375      ()))
 376   "Level 3 empty newsgroup face.")
 377
 378 (defface gnus-group-news-low-face
 379   '((((class color)
 380       (background dark))
 381      (:foreground "DarkTurquoise" :bold t))
 382     (((class color)
 383       (background light))
 384      (:foreground "DarkGreen" :bold t))
 385     (t
 386      ()))
 387   "Low level newsgroup face.")
 388
 389 (defface gnus-group-news-low-empty-face
 390   '((((class color)
 391       (background dark))
 392      (:foreground "DarkTurquoise"))
 393     (((class color)
 394       (background light))
 395      (:foreground "DarkGreen"))
 396     (t
 397      ()))
 398   "Low level empty newsgroup face.")
 399
 400 (defface gnus-group-mail-1-face
 401   '((((class color)
 402       (background dark))
 403      (:foreground "aquamarine1" :bold t))
 404     (((class color)
 405       (background light))
 406      (:foreground "DeepPink3" :bold t))
 407     (t
 408      (:bold t)))
 409   "Level 1 mailgroup face.")
 410
 411 (defface gnus-group-mail-1-empty-face
 412   '((((class color)
 413       (background dark))
 414      (:foreground "aquamarine1"))
 415     (((class color)
 416       (background light))
 417      (:foreground "DeepPink3"))
 418     (t
 419      (:italic t :bold t)))
 420   "Level 1 empty mailgroup face.")
 421
 422 (defface gnus-group-mail-2-face
 423   '((((class color)
 424       (background dark))
 425      (:foreground "aquamarine2" :bold t))
 426     (((class color)
 427       (background light))
 428      (:foreground "HotPink3" :bold t))
 429     (t
 430      (:bold t)))
 431   "Level 2 mailgroup face.")
 432
 433 (defface gnus-group-mail-2-empty-face
 434   '((((class color)
 435       (background dark))
 436      (:foreground "aquamarine2"))
 437     (((class color)
 438       (background light))
 439      (:foreground "HotPink3"))
 440     (t
 441      (:bold t)))
 442   "Level 2 empty mailgroup face.")
 443
 444 (defface gnus-group-mail-3-face
 445   '((((class color)
 446       (background dark))
 447      (:foreground "aquamarine3" :bold t))
 448     (((class color)
 449       (background light))
 450      (:foreground "magenta4" :bold t))
 451     (t
 452      (:bold t)))
 453   "Level 3 mailgroup face.")
 454
 455 (defface gnus-group-mail-3-empty-face
 456   '((((class color)
 457       (background dark))
 458      (:foreground "aquamarine3"))
 459     (((class color)
 460       (background light))
 461      (:foreground "magenta4"))
 462     (t
 463      ()))
 464   "Level 3 empty mailgroup face.")
 465
 466 (defface gnus-group-mail-low-face
 467   '((((class color)
 468       (background dark))
 469      (:foreground "aquamarine4" :bold t))
 470     (((class color)
 471       (background light))
 472      (:foreground "DeepPink4" :bold t))
 473     (t
 474      (:bold t)))
 475   "Low level mailgroup face.")
 476
 477 (defface gnus-group-mail-low-empty-face
 478   '((((class color)
 479       (background dark))
 480      (:foreground "aquamarine4"))
 481     (((class color)
 482       (background light))
 483      (:foreground "DeepPink4"))
 484     (t
 485      (:bold t)))
 486   "Low level empty mailgroup face.")
 487
 488 ;; Summary mode faces.
 489
 490 (defface gnus-summary-selected-face '((t
 491                                        (:underline t)))
 492   "Face used for selected articles.")
 493
 494 (defface gnus-summary-cancelled-face
 495   '((((class color))
 496      (:foreground "yellow" :background "black")))
 497   "Face used for cancelled articles.")
 498
 499 (defface gnus-summary-high-ticked-face
 500   '((((class color)
 501       (background dark))
 502      (:foreground "pink" :bold t))
 503     (((class color)
 504       (background light))
 505      (:foreground "firebrick" :bold t))
 506     (t
 507      (:bold t)))
 508   "Face used for high interest ticked articles.")
 509
 510 (defface gnus-summary-low-ticked-face
 511   '((((class color)
 512       (background dark))
 513      (:foreground "pink" :italic t))
 514     (((class color)
 515       (background light))
 516      (:foreground "firebrick" :italic t))
 517     (t
 518      (:italic t)))
 519   "Face used for low interest ticked articles.")
 520
 521 (defface gnus-summary-normal-ticked-face
 522   '((((class color)
 523       (background dark))
 524      (:foreground "pink"))
 525     (((class color)
 526       (background light))
 527      (:foreground "firebrick"))
 528     (t
 529      ()))
 530   "Face used for normal interest ticked articles.")
 531
 532 (defface gnus-summary-high-ancient-face
 533   '((((class color)
 534       (background dark))
 535      (:foreground "SkyBlue" :bold t))
 536     (((class color)
 537       (background light))
 538      (:foreground "RoyalBlue" :bold t))
 539     (t
 540      (:bold t)))
 541   "Face used for high interest ancient articles.")
 542
 543 (defface gnus-summary-low-ancient-face
 544   '((((class color)
 545       (background dark))
 546      (:foreground "SkyBlue" :italic t))
 547     (((class color)
 548       (background light))
 549      (:foreground "RoyalBlue" :italic t))
 550     (t
 551      (:italic t)))
 552   "Face used for low interest ancient articles.")
 553
 554 (defface gnus-summary-normal-ancient-face
 555   '((((class color)
 556       (background dark))
 557      (:foreground "SkyBlue"))
 558     (((class color)
 559       (background light))
 560      (:foreground "RoyalBlue"))
 561     (t
 562      ()))
 563   "Face used for normal interest ancient articles.")
 564
 565 (defface gnus-summary-high-unread-face
 566   '((t
 567      (:bold t)))
 568   "Face used for high interest unread articles.")
 569
 570 (defface gnus-summary-low-unread-face
 571   '((t
 572      (:italic t)))
 573   "Face used for low interest unread articles.")
 574
 575 (defface gnus-summary-normal-unread-face
 576   '((t
 577      ()))
 578   "Face used for normal interest unread articles.")
 579
 580 (defface gnus-summary-high-read-face
 581   '((((class color)
 582       (background dark))
 583      (:foreground "PaleGreen"
 584                   :bold t))
 585     (((class color)
 586       (background light))
 587      (:foreground "DarkGreen"
 588                   :bold t))
 589     (t
 590      (:bold t)))
 591   "Face used for high interest read articles.")
 592
 593 (defface gnus-summary-low-read-face
 594   '((((class color)
 595       (background dark))
 596      (:foreground "PaleGreen"
 597                   :italic t))
 598     (((class color)
 599       (background light))
 600      (:foreground "DarkGreen"
 601                   :italic t))
 602     (t
 603      (:italic t)))
 604   "Face used for low interest read articles.")
 605
 606 (defface gnus-summary-normal-read-face
 607   '((((class color)
 608       (background dark))
 609      (:foreground "PaleGreen"))
 610     (((class color)
 611       (background light))
 612      (:foreground "DarkGreen"))
 613     (t
 614      ()))
 615   "Face used for normal interest read articles.")
 616
 617
 618 ;;; Splash screen.
 619
 620 (defvar gnus-group-buffer "*Group*")
 621
 622 (eval-and-compile
 623   (autoload 'gnus-play-jingle "gnus-audio"))
 624
 625 (defface gnus-splash-face
 626   '((((class color)
 627       (background dark))
 628      (:foreground "red"))
 629     (((class color)
 630       (background light))
 631      (:foreground "red"))
 632     (t
 633      ()))
 634   "Level 1 newsgroup face.")
 635
 636 (defun gnus-splash ()
 637   (save-excursion
 638     (switch-to-buffer gnus-group-buffer)
 639     (let ((buffer-read-only nil))
 640       (erase-buffer)
 641       (unless gnus-inhibit-startup-message
 642         (gnus-group-startup-message)
 643         (sit-for 0)
 644         (when gnus-play-startup-jingle
 645           (gnus-play-jingle))))))
 646
 647 (defun gnus-indent-rigidly (start end arg)
 648   "Indent rigidly using only spaces and no tabs."
 649   (save-excursion
 650     (save-restriction
 651       (narrow-to-region start end)
 652       (indent-rigidly start end arg)
 653       ;; We translate tabs into spaces -- not everybody uses
 654       ;; an 8-character tab.
 655       (goto-char (point-min))
 656       (while (search-forward "\t" nil t)
 657         (replace-match "        " t t)))))
 658
 659 (defvar gnus-simple-splash nil)
 660
 661 (defun gnus-group-startup-message (&optional x y)
 662   "Insert startup message in current buffer."
 663   ;; Insert the message.
 664   (erase-buffer)
 665   (insert
 666    (format "              %s
 667           _    ___ _             _
 668           _ ___ __ ___  __    _ ___
 669           __   _     ___    __  ___
 670               _           ___     _
 671              _  _ __             _
 672              ___   __            _
 673                    __           _
 674                     _      _   _
 675                    _      _    _
 676                       _  _    _
 677                   __  ___
 678                  _   _ _     _
 679                 _   _
 680               _    _
 681              _    _
 682             _
 683           __
 684
 685 "
 686            ""))
 687   ;; And then hack it.
 688   (gnus-indent-rigidly (point-min) (point-max)
 689                        (/ (max (- (window-width) (or x 46)) 0) 2))
 690   (goto-char (point-min))
 691   (forward-line 1)
 692   (let* ((pheight (count-lines (point-min) (point-max)))
 693          (wheight (window-height))
 694          (rest (- wheight pheight)))
 695     (insert (make-string (max 0 (* 2 (/ rest 3))) ?\n)))
 696   ;; Fontify some.
 697   (put-text-property (point-min) (point-max) 'face 'gnus-splash-face)
 698   (goto-char (point-min))
 699   (setq mode-line-buffer-identification (concat " " gnus-version))
 700   (setq gnus-simple-splash t)
 701   (set-buffer-modified-p t))
 702
 703 (eval-when (load)
 704   (let ((command (format "%s" this-command)))
 705     (when (and (string-match "gnus" command)
 706                (not (string-match "gnus-other-frame" command)))
 707       (gnus-splash))))
 708
 709 ;;; Do the rest.
 710
 711 (require 'custom)
 712 (require 'gnus-util)
 713 (require 'nnheader)
 714
 715 (defcustom gnus-home-directory "~/"
 716   "Directory variable that specifies the \"home\" directory.
 717 All other Gnus path variables are initialized from this variable."
 718   :group 'gnus-files
 719   :type 'directory)
 720
 721 (defcustom gnus-directory (or (getenv "SAVEDIR")
 722                               (nnheader-concat gnus-home-directory "News/"))
 723   "Directory variable from which all other Gnus file variables are derived."
 724   :group 'gnus-files
 725   :type 'directory)
 726
 727 (defcustom gnus-default-directory nil
 728   "*Default directory for all Gnus buffers."
 729   :group 'gnus-files
 730   :type '(choice (const :tag "current" nil)
 731                  directory))
 732
 733 ;; Site dependent variables.  These variables should be defined in
 734 ;; paths.el.
 735
 736 (defvar gnus-default-nntp-server nil
 737   "Specify a default NNTP server.
 738 This variable should be defined in paths.el, and should never be set
 739 by the user.
 740 If you want to change servers, you should use `gnus-select-method'.
 741 See the documentation to that variable.")
 742
 743 ;; Don't touch this variable.
 744 (defvar gnus-nntp-service "nntp"
 745   "NNTP service name (\"nntp\" or 119).
 746 This is an obsolete variable, which is scarcely used.  If you use an
 747 nntp server for your newsgroup and want to change the port number
 748 used to 899, you would say something along these lines:
 749
 750  (setq gnus-select-method '(nntp \"my.nntp.server\" (nntp-port-number 899)))")
 751
 752 (defcustom gnus-nntpserver-file "/etc/nntpserver"
 753   "A file with only the name of the nntp server in it."
 754   :group 'gnus-files
 755   :group 'gnus-server
 756   :type 'file)
 757
 758 ;; This function is used to check both the environment variable
 759 ;; NNTPSERVER and the /etc/nntpserver file to see whether one can find
 760 ;; an nntp server name default.
 761 (defun gnus-getenv-nntpserver ()
 762   (or (getenv "NNTPSERVER")
 763       (and (file-readable-p gnus-nntpserver-file)
 764            (save-excursion
 765              (set-buffer (get-buffer-create " *gnus nntp*"))
 766              (buffer-disable-undo (current-buffer))
 767              (insert-file-contents gnus-nntpserver-file)
 768              (let ((name (buffer-string)))
 769                (prog1
 770                    (if (string-match "^[ \t\n]*$" name)
 771                        nil
 772                      name)
 773                  (kill-buffer (current-buffer))))))))
 774
 775 (defcustom gnus-select-method
 776   (condition-case nil
 777     (nconc
 778      (list 'nntp (or (ignore-errors
 779                        (gnus-getenv-nntpserver))
 780                      (when (and gnus-default-nntp-server
 781                                 (not (string= gnus-default-nntp-server "")))
 782                        gnus-default-nntp-server)
 783                      (system-name)))
 784      (if (or (null gnus-nntp-service)
 785              (equal gnus-nntp-service "nntp"))
 786          nil
 787        (list gnus-nntp-service)))
 788     (error nil))
 789   "Default method for selecting a newsgroup.
 790 This variable should be a list, where the first element is how the
 791 news is to be fetched, the second is the address.
 792
 793 For instance, if you want to get your news via NNTP from
 794 \"flab.flab.edu\", you could say:
 795
 796 \(setq gnus-select-method '(nntp \"flab.flab.edu\"))
 797
 798 If you want to use your local spool, say:
 799
 800 \(setq gnus-select-method (list 'nnspool (system-name)))
 801
 802 If you use this variable, you must set `gnus-nntp-server' to nil.
 803
 804 There is a lot more to know about select methods and virtual servers -
 805 see the manual for details."
 806   :group 'gnus-server
 807   :type 'gnus-select-method)
 808
 809 (defcustom gnus-message-archive-method
 810   `(nnfolder
 811     "archive"
 812     (nnfolder-directory ,(nnheader-concat message-directory "archive"))
 813     (nnfolder-active-file
 814      ,(nnheader-concat message-directory "archive/active"))
 815     (nnfolder-get-new-mail nil)
 816     (nnfolder-inhibit-expiry t))
 817   "Method used for archiving messages you've sent.
 818 This should be a mail method.
 819
 820 It's probably not a very effective to change this variable once you've
 821 run Gnus once.  After doing that, you must edit this server from the
 822 server buffer."
 823   :group 'gnus-server
 824   :group 'gnus-message
 825   :type 'gnus-select-method)
 826
 827 (defcustom gnus-message-archive-group nil
 828   "*Name of the group in which to save the messages you've written.
 829 This can either be a string; a list of strings; or an alist
 830 of regexps/functions/forms to be evaluated to return a string (or a list
 831 of strings).  The functions are called with the name of the current
 832 group (or nil) as a parameter.
 833
 834 If you want to save your mail in one group and the news articles you
 835 write in another group, you could say something like:
 836
 837  \(setq gnus-message-archive-group
 838         '((if (message-news-p)
 839               \"misc-news\"
 840             \"misc-mail\")))
 841
 842 Normally the group names returned by this variable should be
 843 unprefixed -- which implicitly means \"store on the archive server\".
 844 However, you may wish to store the message on some other server.  In
 845 that case, just return a fully prefixed name of the group --
 846 \"nnml+private:mail.misc\", for instance."
 847   :group 'gnus-message
 848   :type '(choice (const :tag "none" nil)
 849                  string))
 850
 851 (defcustom gnus-secondary-servers nil
 852   "List of NNTP servers that the user can choose between interactively.
 853 To make Gnus query you for a server, you have to give `gnus' a
 854 non-numeric prefix - `C-u M-x gnus', in short."
 855   :group 'gnus-server
 856   :type '(repeat string))
 857
 858 (defcustom gnus-nntp-server nil
 859   "*The name of the host running the NNTP server.
 860 This variable is semi-obsolete.  Use the `gnus-select-method'
 861 variable instead."
 862   :group 'gnus-server
 863   :type '(choice (const :tag "disable" nil)
 864                  string))
 865
 866 (defcustom gnus-secondary-select-methods nil
 867   "A list of secondary methods that will be used for reading news.
 868 This is a list where each element is a complete select method (see
 869 `gnus-select-method').
 870
 871 If, for instance, you want to read your mail with the nnml backend,
 872 you could set this variable:
 873
 874 \(setq gnus-secondary-select-methods '((nnml \"\")))"
 875 :group 'gnus-server
 876 :type '(repeat gnus-select-method))
 877
 878 (defvar gnus-backup-default-subscribed-newsgroups
 879   '("news.announce.newusers" "news.groups.questions" "gnu.emacs.gnus")
 880   "Default default new newsgroups the first time Gnus is run.
 881 Should be set in paths.el, and shouldn't be touched by the user.")
 882
 883 (defcustom gnus-local-domain nil
 884   "Local domain name without a host name.
 885 The DOMAINNAME environment variable is used instead if it is defined.
 886 If the `system-name' function returns the full Internet name, there is
 887 no need to set this variable."
 888   :group 'gnus-message
 889   :type '(choice (const :tag "default" nil)
 890                  string))
 891
 892 (defvar gnus-local-organization nil
 893   "String with a description of what organization (if any) the user belongs to.
 894 Obsolete variable; use `message-user-organization' instead.")
 895
 896 ;; Customization variables
 897
 898 (defcustom gnus-refer-article-method nil
 899   "Preferred method for fetching an article by Message-ID.
 900 If you are reading news from the local spool (with nnspool), fetching
 901 articles by Message-ID is painfully slow.  By setting this method to an
 902 nntp method, you might get acceptable results.
 903
 904 The value of this variable must be a valid select method as discussed
 905 in the documentation of `gnus-select-method'."
 906   :group 'gnus-server
 907   :type '(choice (const :tag "default" nil)
 908                  gnus-select-method))
 909
 910 (defcustom gnus-group-faq-directory
 911   '("/ftp@mirrors.aol.com:/pub/rtfm/usenet/"
 912     "/ftp@sunsite.auc.dk:/pub/usenet/"
 913     "/ftp@sunsite.doc.ic.ac.uk:/pub/usenet/news-faqs/"
 914     "/ftp@src.doc.ic.ac.uk:/usenet/news-FAQS/"
 915     "/ftp@ftp.seas.gwu.edu:/pub/rtfm/"
 916     "/ftp@rtfm.mit.edu:/pub/usenet/"
 917     "/ftp@ftp.uni-paderborn.de:/pub/FAQ/"
 918     "/ftp@ftp.sunet.se:/pub/usenet/"
 919     "/ftp@nctuccca.edu.tw:/USENET/FAQ/"
 920     "/ftp@hwarang.postech.ac.kr:/pub/usenet/"
 921     "/ftp@ftp.hk.super.net:/mirror/faqs/")
 922   "Directory where the group FAQs are stored.
 923 This will most commonly be on a remote machine, and the file will be
 924 fetched by ange-ftp.
 925
 926 This variable can also be a list of directories.  In that case, the
 927 first element in the list will be used by default.  The others can
 928 be used when being prompted for a site.
 929
 930 Note that Gnus uses an aol machine as the default directory.  If this
 931 feels fundamentally unclean, just think of it as a way to finally get
 932 something of value back from them.
 933
 934 If the default site is too slow, try one of these:
 935
 936    North America: mirrors.aol.com                /pub/rtfm/usenet
 937                   ftp.seas.gwu.edu               /pub/rtfm
 938                   rtfm.mit.edu                   /pub/usenet
 939    Europe:        ftp.uni-paderborn.de           /pub/FAQ
 940                   src.doc.ic.ac.uk               /usenet/news-FAQS
 941                   ftp.sunet.se                   /pub/usenet
 942                   sunsite.auc.dk                 /pub/usenet
 943    Asia:          nctuccca.edu.tw                /USENET/FAQ
 944                   hwarang.postech.ac.kr          /pub/usenet
 945                   ftp.hk.super.net               /mirror/faqs"
 946   :group 'gnus-group-various
 947   :type '(choice directory
 948                  (repeat directory)))
 949
 950 (defcustom gnus-use-cross-reference t
 951   "*Non-nil means that cross referenced articles will be marked as read.
 952 If nil, ignore cross references.  If t, mark articles as read in
 953 subscribed newsgroups.  If neither t nor nil, mark as read in all
 954 newsgroups."
 955   :group 'gnus-server
 956   :type '(choice (const :tag "off" nil)
 957                  (const :tag "subscribed" t)
 958                  (sexp :format "all"
 959                        :value always)))
 960
 961 (defcustom gnus-process-mark ?#
 962   "*Process mark."
 963   :group 'gnus-group-visual
 964   :group 'gnus-summary-marks
 965   :type 'character)
 966
 967 (defcustom gnus-asynchronous nil
 968   "*If non-nil, Gnus will supply backends with data needed for async article fetching."
 969   :group 'gnus-asynchronous
 970   :type 'boolean)
 971
 972 (defcustom gnus-large-newsgroup 200
 973   "*The number of articles which indicates a large newsgroup.
 974 If the number of articles in a newsgroup is greater than this value,
 975 confirmation is required for selecting the newsgroup."
 976   :group 'gnus-group-select
 977   :type 'integer)
 978
 979 (defcustom gnus-use-long-file-name (not (memq system-type '(usg-unix-v xenix)))
 980   "*Non-nil means that the default name of a file to save articles in is the group name.
 981 If it's nil, the directory form of the group name is used instead.
 982
 983 If this variable is a list, and the list contains the element
 984 `not-score', long file names will not be used for score files; if it
 985 contains the element `not-save', long file names will not be used for
 986 saving; and if it contains the element `not-kill', long file names
 987 will not be used for kill files.
 988
 989 Note that the default for this variable varies according to what system
 990 type you're using.  On `usg-unix-v' and `xenix' this variable defaults
 991 to nil while on all other systems it defaults to t."
 992   :group 'gnus-start
 993   :type 'boolean)
 994
 995 (defcustom gnus-kill-files-directory gnus-directory
 996   "*Name of the directory where kill files will be stored (default \"~/News\")."
 997   :group 'gnus-score-files
 998   :group 'gnus-score-kill
 999   :type 'directory)
1000
1001 (defcustom gnus-save-score nil
1002   "*If non-nil, save group scoring info."
1003   :group 'gnus-score-various
1004   :group 'gnus-start
1005   :type 'boolean)
1006
1007 (defcustom gnus-use-undo t
1008   "*If non-nil, allow undoing in Gnus group mode buffers."
1009   :group 'gnus-meta
1010   :type 'boolean)
1011
1012 (defcustom gnus-use-adaptive-scoring nil
1013   "*If non-nil, use some adaptive scoring scheme.
1014 If a list, then the values `word' and `line' are meaningful.  The
1015 former will perform adaption on individual words in the subject
1016 header while `line' will perform adaption on several headers."
1017   :group 'gnus-meta
1018   :group 'gnus-score-adapt
1019   :type '(set (const word) (const line)))
1020
1021 (defcustom gnus-use-cache 'passive
1022   "*If nil, Gnus will ignore the article cache.
1023 If `passive', it will allow entering (and reading) articles
1024 explicitly entered into the cache.  If anything else, use the
1025 cache to the full extent of the law."
1026   :group 'gnus-meta
1027   :group 'gnus-cache
1028   :type '(choice (const :tag "off" nil)
1029                  (const :tag "passive" passive)
1030                  (const :tag "active" t)))
1031
1032 (defcustom gnus-use-trees nil
1033   "*If non-nil, display a thread tree buffer."
1034   :group 'gnus-meta
1035   :type 'boolean)
1036
1037 (defcustom gnus-use-grouplens nil
1038   "*If non-nil, use GroupLens ratings."
1039   :group 'gnus-meta
1040   :type 'boolean)
1041
1042 (defcustom gnus-keep-backlog nil
1043   "*If non-nil, Gnus will keep read articles for later re-retrieval.
1044 If it is a number N, then Gnus will only keep the last N articles
1045 read.  If it is neither nil nor a number, Gnus will keep all read
1046 articles.  This is not a good idea."
1047   :group 'gnus-meta
1048   :type '(choice (const :tag "off" nil)
1049                  integer
1050                  (sexp :format "all"
1051                        :value t)))
1052
1053 (defcustom gnus-use-nocem nil
1054   "*If non-nil, Gnus will read NoCeM cancel messages."
1055   :group 'gnus-meta
1056   :type 'boolean)
1057
1058 (defcustom gnus-suppress-duplicates nil
1059   "*If non-nil, Gnus will mark duplicate copies of the same article as read."
1060   :group 'gnus-meta
1061   :type 'boolean)
1062
1063 (defcustom gnus-use-demon nil
1064   "If non-nil, Gnus might use some demons."
1065   :group 'gnus-meta
1066   :type 'boolean)
1067
1068 (defcustom gnus-use-scoring t
1069   "*If non-nil, enable scoring."
1070   :group 'gnus-meta
1071   :type 'boolean)
1072
1073 (defcustom gnus-use-picons nil
1074   "*If non-nil, display picons."
1075   :group 'gnus-meta
1076   :type 'boolean)
1077
1078 (defcustom gnus-summary-prepare-exit-hook
1079   '(gnus-summary-expire-articles)
1080   "A hook called when preparing to exit from the summary buffer.
1081 It calls `gnus-summary-expire-articles' by default."
1082   :group 'gnus-summary-exit
1083   :type 'hook)
1084
1085 (defcustom gnus-novice-user t
1086   "*Non-nil means that you are a usenet novice.
1087 If non-nil, verbose messages may be displayed and confirmations may be
1088 required."
1089   :group 'gnus-meta
1090   :type 'boolean)
1091
1092 (defcustom gnus-expert-user nil
1093   "*Non-nil means that you will never be asked for confirmation about anything.
1094 And that means *anything*."
1095   :group 'gnus-meta
1096   :type 'boolean)
1097
1098 (defcustom gnus-interactive-catchup t
1099   "*If non-nil, require your confirmation when catching up a group."
1100   :group 'gnus-group-select
1101   :type 'boolean)
1102
1103 (defcustom gnus-interactive-exit t
1104   "*If non-nil, require your confirmation when exiting Gnus."
1105   :group 'gnus-exit
1106   :type 'boolean)
1107
1108 (defcustom gnus-extract-address-components 'gnus-extract-address-components
1109   "*Function for extracting address components from a From header.
1110 Two pre-defined function exist: `gnus-extract-address-components',
1111 which is the default, quite fast, and too simplistic solution, and
1112 `mail-extract-address-components', which works much better, but is
1113 slower."
1114   :group 'gnus-summary-format
1115   :type '(radio (function-item gnus-extract-address-components)
1116                 (function-item mail-extract-address-components)
1117                 (function :tag "Other")))
1118
1119 (defcustom gnus-carpal nil
1120   "*If non-nil, display clickable icons."
1121   :group 'gnus-meta
1122   :type 'boolean)
1123
1124 (defcustom gnus-shell-command-separator ";"
1125   "String used to separate to shell commands."
1126   :group 'gnus-files
1127   :type 'string)
1128
1129 (defcustom gnus-valid-select-methods
1130   '(("nntp" post address prompt-address physical-address)
1131     ("nnspool" post address)
1132     ("nnvirtual" post-mail virtual prompt-address)
1133     ("nnmbox" mail respool address)
1134     ("nnml" mail respool address)
1135     ("nnmh" mail respool address)
1136     ("nndir" post-mail prompt-address physical-address)
1137     ("nneething" none address prompt-address physical-address)
1138     ("nndoc" none address prompt-address)
1139     ("nnbabyl" mail address respool)
1140     ("nnkiboze" post virtual)
1141     ("nnsoup" post-mail address)
1142     ("nndraft" post-mail)
1143     ("nnfolder" mail respool address)
1144     ("nngateway" none address prompt-address physical-address)
1145     ("nnweb" none))
1146   "An alist of valid select methods.
1147 The first element of each list lists should be a string with the name
1148 of the select method.  The other elements may be the category of
1149 this method (i. e., `post', `mail', `none' or whatever) or other
1150 properties that this method has (like being respoolable).
1151 If you implement a new select method, all you should have to change is
1152 this variable.  I think."
1153   :group 'gnus-server
1154   :type '(repeat (group (string :tag "Name")
1155                         (radio-button-choice (const :format "%v " post)
1156                                              (const :format "%v " mail)
1157                                              (const :format "%v " none)
1158                                              (const post-mail))
1159                         (checklist :inline t
1160                                    (const :format "%v " address)
1161                                    (const :format "%v " prompt-address)
1162                                    (const :format "%v " virtual)
1163                                    (const respool)))))
1164
1165 (define-widget 'gnus-select-method 'list
1166   "Widget for entering a select method."
1167   :args `((choice :tag "Method"
1168                   ,@(mapcar (lambda (entry)
1169                               (list 'const :format "%v\n"
1170                                     (intern (car entry))))
1171                             gnus-valid-select-methods))
1172           (string :tag "Address")
1173           (editable-list  :inline t
1174                           (list :format "%v"
1175                                 variable
1176                                 (sexp :tag "Value")))))
1177
1178 (defcustom gnus-updated-mode-lines '(group article summary tree)
1179   "List of buffers that should update their mode lines.
1180 The list may contain the symbols `group', `article', `tree' and
1181 `summary'.  If the corresponding symbol is present, Gnus will keep
1182 that mode line updated with information that may be pertinent.
1183 If this variable is nil, screen refresh may be quicker."
1184   :group 'gnus-various
1185   :type '(set (const group)
1186               (const article)
1187               (const summary)
1188               (const tree)))
1189
1190 ;; Added by Keinonen Kari <kk85613@cs.tut.fi>.
1191 (defcustom gnus-mode-non-string-length nil
1192   "*Max length of mode-line non-string contents.
1193 If this is nil, Gnus will take space as is needed, leaving the rest
1194 of the modeline intact.  Note that the default of nil is unlikely
1195 to be desirable; see the manual for further details."
1196   :group 'gnus-various
1197   :type '(choice (const nil)
1198                  integer))
1199
1200 (defcustom gnus-auto-expirable-newsgroups nil
1201   "*Groups in which to automatically mark read articles as expirable.
1202 If non-nil, this should be a regexp that should match all groups in
1203 which to perform auto-expiry.  This only makes sense for mail groups."
1204   :group 'nnmail-expire
1205   :type '(choice (const nil)
1206                  regexp))
1207
1208 (defcustom gnus-total-expirable-newsgroups nil
1209   "*Groups in which to perform expiry of all read articles.
1210 Use with extreme caution.  All groups that match this regexp will be
1211 expiring - which means that all read articles will be deleted after
1212 \(say) one week.         (This only goes for mail groups and the like, of
1213 course.)"
1214   :group 'nnmail-expire
1215   :type '(choice (const nil)
1216                  regexp))
1217
1218 (defcustom gnus-group-uncollapsed-levels 1
1219   "Number of group name elements to leave alone when making a short group name."
1220   :group 'gnus-group-visual
1221   :type 'integer)
1222
1223 (defcustom gnus-group-use-permanent-levels nil
1224   "*If non-nil, once you set a level, Gnus will use this level."
1225   :group 'gnus-group-levels
1226   :type 'boolean)
1227
1228 ;; Hooks.
1229
1230 (defcustom gnus-load-hook nil
1231   "A hook run while Gnus is loaded."
1232   :group 'gnus-start
1233   :type 'hook)
1234
1235 (defcustom gnus-apply-kill-hook '(gnus-apply-kill-file)
1236   "A hook called to apply kill files to a group.
1237 This hook is intended to apply a kill file to the selected newsgroup.
1238 The function `gnus-apply-kill-file' is called by default.
1239
1240 Since a general kill file is too heavy to use only for a few
1241 newsgroups, I recommend you to use a lighter hook function.  For
1242 example, if you'd like to apply a kill file to articles which contains
1243 a string `rmgroup' in subject in newsgroup `control', you can use the
1244 following hook:
1245
1246  (setq gnus-apply-kill-hook
1247       (list
1248         (lambda ()
1249           (cond ((string-match \"control\" gnus-newsgroup-name)
1250                  (gnus-kill \"Subject\" \"rmgroup\")
1251                  (gnus-expunge \"X\"))))))"
1252   :group 'gnus-score-kill
1253   :options '(gnus-apply-kill-file)
1254   :type 'hook)
1255
1256 (defcustom gnus-group-change-level-function nil
1257   "Function run when a group level is changed.
1258 It is called with three parameters -- GROUP, LEVEL and OLDLEVEL."
1259   :group 'gnus-group-level
1260   :type 'function)
1261
1262 ;;; Face thingies.
1263
1264 (defcustom gnus-visual
1265   '(summary-highlight group-highlight article-highlight
1266                       mouse-face
1267                       summary-menu group-menu article-menu
1268                       tree-highlight menu highlight
1269                       browse-menu server-menu
1270                       page-marker tree-menu binary-menu pick-menu
1271                       grouplens-menu)
1272   "Enable visual features.
1273 If `visual' is disabled, there will be no menus and few faces.  Most of
1274 the visual customization options below will be ignored.  Gnus will use
1275 less space and be faster as a result.
1276
1277 This variable can also be a list of visual elements to switch on.  For
1278 instance, to switch off all visual things except menus, you can say:
1279
1280    (setq gnus-visual '(menu))
1281
1282 Valid elements include `summary-highlight', `group-highlight',
1283 `article-highlight', `mouse-face', `summary-menu', `group-menu',
1284 `article-menu', `tree-highlight', `menu', `highlight', `browse-menu',
1285 `server-menu', `page-marker', `tree-menu', `binary-menu', `pick-menu',
1286 and `grouplens-menu'."
1287   :group 'gnus-meta
1288   :group 'gnus-visual
1289   :type '(set (const summary-highlight)
1290               (const group-highlight)
1291               (const article-highlight)
1292               (const mouse-face)
1293               (const summary-menu)
1294               (const group-menu)
1295               (const article-menu)
1296               (const tree-highlight)
1297               (const menu)
1298               (const highlight)
1299               (const browse-menu)
1300               (const server-menu)
1301               (const page-marker)
1302               (const tree-menu)
1303               (const binary-menu)
1304               (const pick-menu)
1305               (const grouplens-menu)))
1306
1307 (defcustom gnus-mouse-face
1308   (condition-case ()
1309       (if (gnus-visual-p 'mouse-face 'highlight)
1310           (if (boundp 'gnus-mouse-face)
1311               (or gnus-mouse-face 'highlight)
1312             'highlight)
1313         'default)
1314     (error 'highlight))
1315   "Face used for group or summary buffer mouse highlighting.
1316 The line beneath the mouse pointer will be highlighted with this
1317 face."
1318   :group 'gnus-visual
1319   :type 'face)
1320
1321 (defcustom gnus-article-display-hook
1322   (if (and (string-match "XEmacs" emacs-version)
1323            (featurep 'xface))
1324       '(gnus-article-hide-headers-if-wanted
1325         gnus-article-hide-boring-headers
1326         gnus-article-treat-overstrike
1327         gnus-article-maybe-highlight
1328         gnus-article-display-x-face)
1329     '(gnus-article-hide-headers-if-wanted
1330       gnus-article-hide-boring-headers
1331       gnus-article-treat-overstrike
1332       gnus-article-maybe-highlight))
1333   "Controls how the article buffer will look.
1334
1335 If you leave the list empty, the article will appear exactly as it is
1336 stored on the disk.  The list entries will hide or highlight various
1337 parts of the article, making it easier to find the information you
1338 want."
1339   :group 'gnus-article-highlight
1340   :group 'gnus-visual
1341   :type 'hook
1342   :options '(gnus-article-add-buttons
1343              gnus-article-add-buttons-to-head
1344              gnus-article-emphasize
1345              gnus-article-fill-cited-article
1346              gnus-article-remove-cr
1347              gnus-article-de-quoted-unreadable
1348              gnus-article-display-x-face
1349              gnus-summary-stop-page-breaking
1350              ;; gnus-summary-caesar-message
1351              ;; gnus-summary-verbose-headers
1352              gnus-summary-toggle-mime
1353              gnus-article-hide
1354              gnus-article-hide-headers
1355              gnus-article-hide-boring-headers
1356              gnus-article-hide-signature
1357              gnus-article-hide-citation
1358              gnus-article-hide-pgp
1359              gnus-article-hide-pem
1360              gnus-article-highlight
1361              gnus-article-highlight-headers
1362              gnus-article-highlight-citation
1363              gnus-article-highlight-signature
1364              gnus-article-date-ut
1365              gnus-article-date-local
1366              gnus-article-date-lapsed
1367              gnus-article-date-original
1368              gnus-article-remove-trailing-blank-lines
1369              gnus-article-strip-leading-blank-lines
1370              gnus-article-strip-multiple-blank-lines
1371              gnus-article-strip-blank-lines
1372              gnus-article-treat-overstrike))
1373
1374 (defcustom gnus-article-save-directory gnus-directory
1375   "*Name of the directory articles will be saved in (default \"~/News\")."
1376   :group 'gnus-article-saving
1377   :type 'directory)
1378
1379 \f
1380 ;;; Internal variables
1381
1382 (defvar gnus-group-get-parameter-function 'gnus-group-get-parameter)
1383 (defvar gnus-original-article-buffer " *Original Article*")
1384 (defvar gnus-newsgroup-name nil)
1385
1386 (defvar gnus-current-select-method nil
1387   "The current method for selecting a newsgroup.")
1388
1389 (defvar gnus-tree-buffer "*Tree*"
1390   "Buffer where Gnus thread trees are displayed.")
1391
1392 ;; Dummy variable.
1393 (defvar gnus-use-generic-from nil)
1394
1395 ;; Variable holding the user answers to all method prompts.
1396 (defvar gnus-method-history nil)
1397 (defvar gnus-group-history nil)
1398
1399 ;; Variable holding the user answers to all mail method prompts.
1400 (defvar gnus-mail-method-history nil)
1401
1402 ;; Variable holding the user answers to all group prompts.
1403 (defvar gnus-group-history nil)
1404
1405 (defvar gnus-server-alist nil
1406   "List of available servers.")
1407
1408 (defvar gnus-predefined-server-alist
1409   `(("cache"
1410      (nnspool "cache"
1411               (nnspool-spool-directory "~/News/cache/")
1412               (nnspool-nov-directory "~/News/cache/")
1413               (nnspool-active-file "~/News/cache/active"))))
1414   "List of predefined (convenience) servers.")
1415
1416 (defvar gnus-topic-indentation "") ;; Obsolete variable.
1417
1418 (defconst gnus-article-mark-lists
1419   '((marked . tick) (replied . reply)
1420     (expirable . expire) (killed . killed)
1421     (bookmarks . bookmark) (dormant . dormant)
1422     (scored . score) (saved . save)
1423     (cached . cache)))
1424
1425 (defvar gnus-headers-retrieved-by nil)
1426 (defvar gnus-article-reply nil)
1427 (defvar gnus-override-method nil)
1428 (defvar gnus-article-check-size nil)
1429 (defvar gnus-opened-servers nil)
1430
1431 (defvar gnus-current-kill-article nil)
1432
1433 (defvar gnus-have-read-active-file nil)
1434
1435 (defconst gnus-maintainer
1436   "bugs@gnus.org (The Gnus Bugfixing Girls + Boys)"
1437   "The mail address of the Gnus maintainers.")
1438
1439 (defvar gnus-info-nodes
1440   '((gnus-group-mode "(gnus)The Group Buffer")
1441     (gnus-summary-mode "(gnus)The Summary Buffer")
1442     (gnus-article-mode "(gnus)The Article Buffer")
1443     (mime/viewer-mode "(gnus)The Article Buffer")
1444     (gnus-server-mode "(gnus)The Server Buffer")
1445     (gnus-browse-mode "(gnus)Browse Foreign Server")
1446     (gnus-tree-mode "(gnus)Tree Display"))
1447   "Alist of major modes and related Info nodes.")
1448
1449 (defvar gnus-group-buffer "*Group*")
1450 (defvar gnus-summary-buffer "*Summary*")
1451 (defvar gnus-article-buffer "*Article*")
1452 (defvar gnus-server-buffer "*Server*")
1453
1454 (defvar gnus-buffer-list nil
1455   "Gnus buffers that should be killed on exit.")
1456
1457 (defvar gnus-slave nil
1458   "Whether this Gnus is a slave or not.")
1459
1460 (defvar gnus-batch-mode nil
1461   "Whether this Gnus is running in batch mode or not.")
1462
1463 (defvar gnus-variable-list
1464   '(gnus-newsrc-options gnus-newsrc-options-n
1465     gnus-newsrc-last-checked-date
1466     gnus-newsrc-alist gnus-server-alist
1467     gnus-killed-list gnus-zombie-list
1468     gnus-topic-topology gnus-topic-alist
1469     gnus-format-specs)
1470   "Gnus variables saved in the quick startup file.")
1471
1472 (defvar gnus-newsrc-alist nil
1473   "Assoc list of read articles.
1474 gnus-newsrc-hashtb should be kept so that both hold the same information.")
1475
1476 (defvar gnus-newsrc-hashtb nil
1477   "Hashtable of gnus-newsrc-alist.")
1478
1479 (defvar gnus-killed-list nil
1480   "List of killed newsgroups.")
1481
1482 (defvar gnus-killed-hashtb nil
1483   "Hash table equivalent of gnus-killed-list.")
1484
1485 (defvar gnus-zombie-list nil
1486   "List of almost dead newsgroups.")
1487
1488 (defvar gnus-description-hashtb nil
1489   "Descriptions of newsgroups.")
1490
1491 (defvar gnus-list-of-killed-groups nil
1492   "List of newsgroups that have recently been killed by the user.")
1493
1494 (defvar gnus-active-hashtb nil
1495   "Hashtable of active articles.")
1496
1497 (defvar gnus-moderated-hashtb nil
1498   "Hashtable of moderated newsgroups.")
1499
1500 ;; Save window configuration.
1501 (defvar gnus-prev-winconf nil)
1502
1503 (defvar gnus-reffed-article-number nil)
1504
1505 ;;; Let the byte-compiler know that we know about this variable.
1506 (defvar rmail-default-rmail-file)
1507
1508 (defvar gnus-dead-summary nil)
1509
1510 ;;; End of variables.
1511
1512 ;; Define some autoload functions Gnus might use.
1513 (eval-and-compile
1514
1515   ;; This little mapcar goes through the list below and marks the
1516   ;; symbols in question as autoloaded functions.
1517   (mapcar
1518    (lambda (package)
1519      (let ((interactive (nth 1 (memq ':interactive package))))
1520        (mapcar
1521         (lambda (function)
1522           (let (keymap)
1523             (when (consp function)
1524               (setq keymap (car (memq 'keymap function)))
1525               (setq function (car function)))
1526             (autoload function (car package) nil interactive keymap)))
1527         (if (eq (nth 1 package) ':interactive)
1528             (cdddr package)
1529           (cdr package)))))
1530    '(("metamail" metamail-buffer)
1531      ("info" Info-goto-node)
1532      ("hexl" hexl-hex-string-to-integer)
1533      ("pp" pp pp-to-string pp-eval-expression)
1534      ("ps-print" ps-print-preprint)
1535      ("mail-extr" mail-extract-address-components)
1536      ("message" :interactive t
1537       message-send-and-exit message-yank-original)
1538      ("nnmail" nnmail-split-fancy nnmail-article-group nnmail-date-to-time)
1539      ("nnvirtual" nnvirtual-catchup-group nnvirtual-convert-headers)
1540      ("timezone" timezone-make-date-arpa-standard timezone-fix-time
1541       timezone-make-sortable-date timezone-make-time-string)
1542      ("rmailout" rmail-output)
1543      ("rmail" rmail-insert-rmail-file-header rmail-count-new-messages
1544       rmail-show-message)
1545      ("gnus-audio" :interactive t gnus-audio-play)
1546      ("gnus-xmas" gnus-xmas-splash)
1547      ("gnus-soup" :interactive t
1548       gnus-group-brew-soup gnus-brew-soup gnus-soup-add-article
1549       gnus-soup-send-replies gnus-soup-save-areas gnus-soup-pack-packet)
1550      ("nnsoup" nnsoup-pack-replies)
1551      ("score-mode" :interactive t gnus-score-mode)
1552      ("gnus-mh" gnus-summary-save-article-folder
1553       gnus-Folder-save-name gnus-folder-save-name)
1554      ("gnus-mh" :interactive t gnus-summary-save-in-folder)
1555      ("gnus-demon" gnus-demon-add-nocem gnus-demon-add-scanmail
1556       gnus-demon-add-rescan gnus-demon-add-scan-timestamps
1557       gnus-demon-add-disconnection gnus-demon-add-handler
1558       gnus-demon-remove-handler)
1559      ("gnus-demon" :interactive t
1560       gnus-demon-init gnus-demon-cancel)
1561      ("gnus-salt" gnus-highlight-selected-tree gnus-possibly-generate-tree
1562       gnus-tree-open gnus-tree-close gnus-carpal-setup-buffer)
1563      ("gnus-nocem" gnus-nocem-scan-groups gnus-nocem-close
1564       gnus-nocem-unwanted-article-p)
1565      ("gnus-srvr" gnus-enter-server-buffer gnus-server-set-info)
1566      ("gnus-srvr" gnus-browse-foreign-server)
1567      ("gnus-cite" :interactive t
1568       gnus-article-highlight-citation gnus-article-hide-citation-maybe
1569       gnus-article-hide-citation gnus-article-fill-cited-article
1570       gnus-article-hide-citation-in-followups)
1571      ("gnus-kill" gnus-kill gnus-apply-kill-file-internal
1572       gnus-kill-file-edit-file gnus-kill-file-raise-followups-to-author
1573       gnus-execute gnus-expunge)
1574      ("gnus-cache" gnus-cache-possibly-enter-article gnus-cache-save-buffers
1575       gnus-cache-possibly-remove-articles gnus-cache-request-article
1576       gnus-cache-retrieve-headers gnus-cache-possibly-alter-active
1577       gnus-cache-enter-remove-article gnus-cached-article-p
1578       gnus-cache-open gnus-cache-close gnus-cache-update-article)
1579       ("gnus-cache" :interactive t gnus-jog-cache gnus-cache-enter-article
1580        gnus-cache-remove-article gnus-summary-insert-cached-articles)
1581       ("gnus-score" :interactive t
1582        gnus-summary-increase-score gnus-summary-set-score
1583        gnus-summary-raise-thread gnus-summary-raise-same-subject
1584        gnus-summary-raise-score gnus-summary-raise-same-subject-and-select
1585        gnus-summary-lower-thread gnus-summary-lower-same-subject
1586        gnus-summary-lower-score gnus-summary-lower-same-subject-and-select
1587        gnus-summary-current-score gnus-score-default
1588        gnus-score-flush-cache gnus-score-close
1589        gnus-possibly-score-headers gnus-score-followup-article
1590        gnus-score-followup-thread)
1591       ("gnus-score"
1592        (gnus-summary-score-map keymap) gnus-score-save gnus-score-headers
1593       gnus-current-score-file-nondirectory gnus-score-adaptive
1594       gnus-score-find-trace gnus-score-file-name)
1595      ("gnus-cus" :interactive t gnus-group-customize gnus-score-customize)
1596      ("gnus-topic" :interactive t gnus-topic-mode)
1597      ("gnus-topic" gnus-topic-remove-group gnus-topic-set-parameters)
1598      ("gnus-salt" :interactive t gnus-pick-mode gnus-binary-mode)
1599      ("gnus-uu" (gnus-uu-extract-map keymap) (gnus-uu-mark-map keymap))
1600      ("gnus-uu" :interactive t
1601       gnus-uu-digest-mail-forward gnus-uu-digest-post-forward
1602       gnus-uu-mark-series gnus-uu-mark-region gnus-uu-mark-buffer
1603       gnus-uu-mark-by-regexp gnus-uu-mark-all
1604       gnus-uu-mark-sparse gnus-uu-mark-thread gnus-uu-decode-uu
1605       gnus-uu-decode-uu-and-save gnus-uu-decode-unshar
1606       gnus-uu-decode-unshar-and-save gnus-uu-decode-save
1607       gnus-uu-decode-binhex gnus-uu-decode-uu-view
1608       gnus-uu-decode-uu-and-save-view gnus-uu-decode-unshar-view
1609       gnus-uu-decode-unshar-and-save-view gnus-uu-decode-save-view
1610       gnus-uu-decode-binhex-view)
1611      ("gnus-uu" gnus-uu-delete-work-dir gnus-quote-arg-for-sh-or-csh)
1612      ("gnus-msg" (gnus-summary-send-map keymap)
1613       gnus-article-mail gnus-copy-article-buffer gnus-extended-version)
1614      ("gnus-msg" :interactive t
1615       gnus-group-post-news gnus-group-mail gnus-summary-post-news
1616       gnus-summary-followup gnus-summary-followup-with-original
1617       gnus-summary-cancel-article gnus-summary-supersede-article
1618       gnus-post-news gnus-summary-reply gnus-summary-reply-with-original
1619       gnus-summary-mail-forward gnus-summary-mail-other-window
1620       gnus-summary-resend-message gnus-summary-resend-bounced-mail
1621       gnus-bug)
1622      ("gnus-picon" :interactive t gnus-article-display-picons
1623       gnus-group-display-picons gnus-picons-article-display-x-face
1624       gnus-picons-display-x-face)
1625      ("gnus-gl" bbb-login bbb-logout bbb-grouplens-group-p
1626       gnus-grouplens-mode)
1627      ("smiley" :interactive t gnus-smiley-display)
1628      ("gnus-win" gnus-configure-windows gnus-add-configuration)
1629      ("gnus-sum" gnus-summary-insert-line gnus-summary-read-group
1630       gnus-list-of-unread-articles gnus-list-of-read-articles
1631       gnus-offer-save-summaries gnus-make-thread-indent-array
1632       gnus-summary-exit gnus-update-read-articles)
1633      ("gnus-group" gnus-group-insert-group-line gnus-group-quit
1634       gnus-group-list-groups gnus-group-first-unread-group
1635       gnus-group-set-mode-line gnus-group-set-info gnus-group-save-newsrc
1636       gnus-group-setup-buffer gnus-group-get-new-news
1637       gnus-group-make-help-group gnus-group-update-group)
1638      ("gnus-bcklg" gnus-backlog-request-article gnus-backlog-enter-article
1639       gnus-backlog-remove-article)
1640      ("gnus-art" gnus-article-read-summary-keys gnus-article-save
1641       gnus-article-prepare gnus-article-set-window-start
1642       gnus-article-next-page gnus-article-prev-page
1643       gnus-request-article-this-buffer gnus-article-mode
1644       gnus-article-setup-buffer gnus-narrow-to-page
1645       gnus-article-delete-invisible-text)
1646      ("gnus-art" :interactive t
1647       gnus-article-hide-headers gnus-article-hide-boring-headers
1648       gnus-article-treat-overstrike gnus-article-word-wrap
1649       gnus-article-remove-cr gnus-article-remove-trailing-blank-lines
1650       gnus-article-display-x-face gnus-article-de-quoted-unreadable
1651       gnus-article-mime-decode-quoted-printable gnus-article-hide-pgp
1652       gnus-article-hide-pem gnus-article-hide-signature
1653       gnus-article-strip-leading-blank-lines gnus-article-date-local
1654       gnus-article-date-original gnus-article-date-lapsed
1655       gnus-article-show-all-headers
1656       gnus-article-edit-mode gnus-article-edit-article
1657       gnus-article-edit-done gnus-decode-rfc1522 article-decode-rfc1522)
1658      ("gnus-int" gnus-request-type)
1659      ("gnus-start" gnus-newsrc-parse-options gnus-1 gnus-no-server-1
1660       gnus-dribble-enter)
1661      ("gnus-dup" gnus-dup-suppress-articles gnus-dup-unsuppress-article
1662       gnus-dup-enter-articles)
1663      ("gnus-range" gnus-copy-sequence)
1664      ("gnus-eform" gnus-edit-form)
1665      ("gnus-move" :interactive t
1666       gnus-group-move-group-to-server gnus-change-server)
1667      ("gnus-logic" gnus-score-advanced)
1668      ("gnus-undo" gnus-undo-mode gnus-undo-register)
1669      ("gnus-async" gnus-async-request-fetched-article gnus-async-prefetch-next
1670       gnus-async-prefetch-article gnus-async-prefetch-remove-group
1671       gnus-async-halt-prefetch)
1672      ("gnus-vm" :interactive t gnus-summary-save-in-vm
1673       gnus-summary-save-article-vm))))
1674
1675 ;;; gnus-sum.el thingies
1676
1677
1678 (defcustom gnus-summary-line-format "%U\%R\%z\%I\%(%[%4L: %-20,20n%]%) %s\n"
1679   "*The format specification of the lines in the summary buffer.
1680
1681 It works along the same lines as a normal formatting string,
1682 with some simple extensions.
1683
1684 %N   Article number, left padded with spaces (string)
1685 %S   Subject (string)
1686 %s   Subject if it is at the root of a thread, and \"\" otherwise (string)
1687 %n   Name of the poster (string)
1688 %a   Extracted name of the poster (string)
1689 %A   Extracted address of the poster (string)
1690 %F   Contents of the From: header (string)
1691 %x   Contents of the Xref: header (string)
1692 %D   Date of the article (string)
1693 %d   Date of the article (string) in DD-MMM format
1694 %M   Message-id of the article (string)
1695 %r   References of the article (string)
1696 %c   Number of characters in the article (integer)
1697 %L   Number of lines in the article (integer)
1698 %I   Indentation based on thread level (a string of spaces)
1699 %T   A string with two possible values: 80 spaces if the article
1700      is on thread level two or larger and 0 spaces on level one
1701 %R   \"A\" if this article has been replied to, \" \" otherwise (character)
1702 %U   Status of this article (character, \"R\", \"K\", \"-\" or \" \")
1703 %[   Opening bracket (character, \"[\" or \"<\")
1704 %]   Closing bracket (character, \"]\" or \">\")
1705 %>   Spaces of length thread-level (string)
1706 %<   Spaces of length (- 20 thread-level) (string)
1707 %i   Article score (number)
1708 %z   Article zcore (character)
1709 %t   Number of articles under the current thread (number).
1710 %e   Whether the thread is empty or not (character).
1711 %l   GroupLens score (string).
1712 %V   Total thread score (number).
1713 %P   The line number (number).
1714 %u   User defined specifier.  The next character in the format string should
1715      be a letter.  Gnus will call the function gnus-user-format-function-X,
1716      where X is the letter following %u.  The function will be passed the
1717      current header as argument.  The function should return a string, which
1718      will be inserted into the summary just like information from any other
1719      summary specifier.
1720
1721 Text between %( and %) will be highlighted with `gnus-mouse-face'
1722 when the mouse point is placed inside the area.  There can only be one
1723 such area.
1724
1725 The %U (status), %R (replied) and %z (zcore) specs have to be handled
1726 with care.  For reasons of efficiency, Gnus will compute what column
1727 these characters will end up in, and \"hard-code\" that.  This means that
1728 it is illegal to have these specs after a variable-length spec.  Well,
1729 you might not be arrested, but your summary buffer will look strange,
1730 which is bad enough.
1731
1732 The smart choice is to have these specs as for to the left as
1733 possible.
1734
1735 This restriction may disappear in later versions of Gnus."
1736   :type 'string
1737   :group 'gnus-summary-format)
1738
1739 ;;;
1740 ;;; Skeleton keymaps
1741 ;;;
1742
1743 (defun gnus-suppress-keymap (keymap)
1744   (suppress-keymap keymap)
1745   (let ((keys `([delete] "\177" "\M-u"))) ;gnus-mouse-2
1746     (while keys
1747       (define-key keymap (pop keys) 'undefined))))
1748
1749 (defvar gnus-article-mode-map
1750   (let ((keymap (make-keymap)))
1751     (gnus-suppress-keymap keymap)
1752     keymap))
1753 (defvar gnus-summary-mode-map
1754   (let ((keymap (make-keymap)))
1755     (gnus-suppress-keymap keymap)
1756     keymap))
1757 (defvar gnus-group-mode-map
1758   (let ((keymap (make-keymap)))
1759     (gnus-suppress-keymap keymap)
1760     keymap))
1761
1762 \f
1763
1764 ;; Fix by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>.
1765 ;; If you want the cursor to go somewhere else, set these two
1766 ;; functions in some startup hook to whatever you want.
1767 (defalias 'gnus-summary-position-point 'gnus-goto-colon)
1768 (defalias 'gnus-group-position-point 'gnus-goto-colon)
1769
1770 ;;; Various macros and substs.
1771
1772 (defun gnus-header-from (header)
1773   (mail-header-from header))
1774
1775 (defmacro gnus-gethash (string hashtable)
1776   "Get hash value of STRING in HASHTABLE."
1777   `(symbol-value (intern-soft ,string ,hashtable)))
1778
1779 (defmacro gnus-sethash (string value hashtable)
1780   "Set hash value.  Arguments are STRING, VALUE, and HASHTABLE."
1781   `(set (intern ,string ,hashtable) ,value))
1782 (put 'gnus-sethash 'edebug-form-spec '(form form form))
1783
1784 (defmacro gnus-group-unread (group)
1785   "Get the currently computed number of unread articles in GROUP."
1786   `(car (gnus-gethash ,group gnus-newsrc-hashtb)))
1787
1788 (defmacro gnus-group-entry (group)
1789   "Get the newsrc entry for GROUP."
1790   `(gnus-gethash ,group gnus-newsrc-hashtb))
1791
1792 (defmacro gnus-active (group)
1793   "Get active info on GROUP."
1794   `(gnus-gethash ,group gnus-active-hashtb))
1795
1796 (defmacro gnus-set-active (group active)
1797   "Set GROUP's active info."
1798   `(gnus-sethash ,group ,active gnus-active-hashtb))
1799
1800 (defun gnus-alive-p ()
1801   "Say whether Gnus is running or not."
1802   (and gnus-group-buffer
1803        (get-buffer gnus-group-buffer)
1804        (save-excursion
1805          (set-buffer gnus-group-buffer)
1806          (eq major-mode 'gnus-group-mode))))
1807
1808 ;; Info access macros.
1809
1810 (defmacro gnus-info-group (info)
1811   `(nth 0 ,info))
1812 (defmacro gnus-info-rank (info)
1813   `(nth 1 ,info))
1814 (defmacro gnus-info-read (info)
1815   `(nth 2 ,info))
1816 (defmacro gnus-info-marks (info)
1817   `(nth 3 ,info))
1818 (defmacro gnus-info-method (info)
1819   `(nth 4 ,info))
1820 (defmacro gnus-info-params (info)
1821   `(nth 5 ,info))
1822
1823 (defmacro gnus-info-level (info)
1824   `(let ((rank (gnus-info-rank ,info)))
1825      (if (consp rank)
1826          (car rank)
1827        rank)))
1828 (defmacro gnus-info-score (info)
1829   `(let ((rank (gnus-info-rank ,info)))
1830      (or (and (consp rank) (cdr rank)) 0)))
1831
1832 (defmacro gnus-info-set-group (info group)
1833   `(setcar ,info ,group))
1834 (defmacro gnus-info-set-rank (info rank)
1835   `(setcar (nthcdr 1 ,info) ,rank))
1836 (defmacro gnus-info-set-read (info read)
1837   `(setcar (nthcdr 2 ,info) ,read))
1838 (defmacro gnus-info-set-marks (info marks &optional extend)
1839   (if extend
1840       `(gnus-info-set-entry ,info ,marks 3)
1841     `(setcar (nthcdr 3 ,info) ,marks)))
1842 (defmacro gnus-info-set-method (info method &optional extend)
1843   (if extend
1844       `(gnus-info-set-entry ,info ,method 4)
1845     `(setcar (nthcdr 4 ,info) ,method)))
1846 (defmacro gnus-info-set-params (info params &optional extend)
1847   (if extend
1848       `(gnus-info-set-entry ,info ,params 5)
1849     `(setcar (nthcdr 5 ,info) ,params)))
1850
1851 (defun gnus-info-set-entry (info entry number)
1852   ;; Extend the info until we have enough elements.
1853   (while (<= (length info) number)
1854     (nconc info (list nil)))
1855   ;; Set the entry.
1856   (setcar (nthcdr number info) entry))
1857
1858 (defmacro gnus-info-set-level (info level)
1859   `(let ((rank (cdr ,info)))
1860      (if (consp (car rank))
1861          (setcar (car rank) ,level)
1862        (setcar rank ,level))))
1863 (defmacro gnus-info-set-score (info score)
1864   `(let ((rank (cdr ,info)))
1865      (if (consp (car rank))
1866          (setcdr (car rank) ,score)
1867        (setcar rank (cons (car rank) ,score)))))
1868
1869 (defmacro gnus-get-info (group)
1870   `(nth 2 (gnus-gethash ,group gnus-newsrc-hashtb)))
1871
1872 ;; Byte-compiler warning.
1873 (defvar gnus-visual)
1874 ;; Find out whether the gnus-visual TYPE is wanted.
1875 (defun gnus-visual-p (&optional type class)
1876   (and gnus-visual                      ; Has to be non-nil, at least.
1877        (if (not type)                   ; We don't care about type.
1878            gnus-visual
1879          (if (listp gnus-visual)        ; It's a list, so we check it.
1880              (or (memq type gnus-visual)
1881                  (memq class gnus-visual))
1882            t))))
1883
1884 ;;; Load the compatability functions.
1885
1886 (require 'gnus-ems)
1887
1888 \f
1889 ;;;
1890 ;;; Shutdown
1891 ;;;
1892
1893 (defvar gnus-shutdown-alist nil)
1894
1895 (defun gnus-add-shutdown (function &rest symbols)
1896   "Run FUNCTION whenever one of SYMBOLS is shut down."
1897   (push (cons function symbols) gnus-shutdown-alist))
1898
1899 (defun gnus-shutdown (symbol)
1900   "Shut down everything that waits for SYMBOL."
1901   (let ((alist gnus-shutdown-alist)
1902         entry)
1903     (while (setq entry (pop alist))
1904       (when (memq symbol (cdr entry))
1905         (funcall (car entry))))))
1906
1907 \f
1908 ;;;
1909 ;;; Gnus Utility Functions
1910 ;;;
1911
1912 ;; Add the current buffer to the list of buffers to be killed on exit.
1913 (defun gnus-add-current-to-buffer-list ()
1914   (or (memq (current-buffer) gnus-buffer-list)
1915       (push (current-buffer) gnus-buffer-list)))
1916
1917 (defun gnus-version (&optional arg)
1918   "Version number of this version of Gnus.
1919 If ARG, insert string at point."
1920   (interactive "P")
1921   (let ((methods gnus-valid-select-methods)
1922         (mess gnus-version)
1923         meth)
1924     ;; Go through all the legal select methods and add their version
1925     ;; numbers to the total version string.  Only the backends that are
1926     ;; currently in use will have their message numbers taken into
1927     ;; consideration.
1928     (while methods
1929       (setq meth (intern (concat (caar methods) "-version")))
1930       (and (boundp meth)
1931            (stringp (symbol-value meth))
1932            (setq mess (concat mess "; " (symbol-value meth))))
1933       (setq methods (cdr methods)))
1934     (if arg
1935         (insert (message mess))
1936       (message mess))))
1937
1938 (defun gnus-continuum-version (version)
1939   "Return VERSION as a floating point number."
1940   (when (or (string-match "^\\([^ ]+\\)? ?Gnus v?\\([0-9.]+\\)$" version)
1941             (string-match "^\\(.?\\)gnus-\\([0-9.]+\\)$" version))
1942     (let* ((alpha (and (match-beginning 1) (match-string 1 version)))
1943            (number (match-string 2 version))
1944            major minor least)
1945       (string-match "\\([0-9]\\)\\.\\([0-9]+\\)\\.?\\([0-9]+\\)?" number)
1946       (setq major (string-to-number (match-string 1 number)))
1947       (setq minor (string-to-number (match-string 2 number)))
1948       (setq least (if (match-beginning 3)
1949                       (string-to-number (match-string 3 number))
1950                     0))
1951       (string-to-number
1952        (if (zerop major)
1953            (format "%s00%02d%02d"
1954                    (cond
1955                     ((member alpha '("(ding)" "d")) "4.99")
1956                     ((member alpha '("September" "s")) "5.01")
1957                     ((member alpha '("Red" "r")) "5.03"))
1958                    minor least)
1959          (format "%d.%02d%02d" major minor least))))))
1960
1961 (defun gnus-info-find-node ()
1962   "Find Info documentation of Gnus."
1963   (interactive)
1964   ;; Enlarge info window if needed.
1965   (let (gnus-info-buffer)
1966     (Info-goto-node (cadr (assq major-mode gnus-info-nodes)))
1967     (setq gnus-info-buffer (current-buffer))
1968     (gnus-configure-windows 'info)))
1969
1970 ;;; More various functions.
1971
1972 (defsubst gnus-check-backend-function (func group)
1973   "Check whether GROUP supports function FUNC.
1974 GROUP can either be a string (a group name) or a select method."
1975   (ignore-errors
1976     (let ((method (if (stringp group)
1977                       (car (gnus-find-method-for-group group))
1978                     group)))
1979       (unless (featurep method)
1980         (require method))
1981       (fboundp (intern (format "%s-%s" method func))))))
1982
1983 (defun gnus-group-read-only-p (&optional group)
1984   "Check whether GROUP supports editing or not.
1985 If GROUP is nil, `gnus-newsgroup-name' will be checked instead.  Note
1986 that that variable is buffer-local to the summary buffers."
1987   (let ((group (or group gnus-newsgroup-name)))
1988     (not (gnus-check-backend-function 'request-replace-article group))))
1989
1990 (defun gnus-group-total-expirable-p (group)
1991   "Check whether GROUP is total-expirable or not."
1992   (let ((params (gnus-group-find-parameter group))
1993         val)
1994     (cond
1995      ((memq 'total-expire params)
1996       t)
1997      ((setq val (assq 'total-expire params)) ; (auto-expire . t)
1998       (cdr val))
1999      (gnus-total-expirable-newsgroups   ; Check var.
2000       (string-match gnus-total-expirable-newsgroups group)))))
2001
2002 (defun gnus-group-auto-expirable-p (group)
2003   "Check whether GROUP is total-expirable or not."
2004   (let ((params (gnus-group-find-parameter group))
2005         val)
2006     (cond
2007      ((memq 'auto-expire params)
2008       t)
2009      ((setq val (assq 'auto-expire params)) ; (auto-expire . t)
2010       (cdr val))
2011      (gnus-auto-expirable-newsgroups    ; Check var.
2012       (string-match gnus-auto-expirable-newsgroups group)))))
2013
2014 (defun gnus-virtual-group-p (group)
2015   "Say whether GROUP is virtual or not."
2016   (memq 'virtual (assoc (symbol-name (car (gnus-find-method-for-group group)))
2017                         gnus-valid-select-methods)))
2018
2019 (defun gnus-news-group-p (group &optional article)
2020   "Return non-nil if GROUP (and ARTICLE) come from a news server."
2021   (or (gnus-member-of-valid 'post group) ; Ordinary news group.
2022       (and (gnus-member-of-valid 'post-mail group) ; Combined group.
2023            (eq (gnus-request-type group article) 'news))))
2024
2025 ;; Returns a list of writable groups.
2026 (defun gnus-writable-groups ()
2027   (let ((alist gnus-newsrc-alist)
2028         groups group)
2029     (while (setq group (car (pop alist)))
2030       (unless (gnus-group-read-only-p group)
2031         (push group groups)))
2032     (nreverse groups)))
2033
2034 ;; Check whether to use long file names.
2035 (defun gnus-use-long-file-name (symbol)
2036   ;; The variable has to be set...
2037   (and gnus-use-long-file-name
2038        ;; If it isn't a list, then we return t.
2039        (or (not (listp gnus-use-long-file-name))
2040            ;; If it is a list, and the list contains `symbol', we
2041            ;; return nil.
2042            (not (memq symbol gnus-use-long-file-name)))))
2043
2044 ;; Generate a unique new group name.
2045 (defun gnus-generate-new-group-name (leaf)
2046   (let ((name leaf)
2047         (num 0))
2048     (while (gnus-gethash name gnus-newsrc-hashtb)
2049       (setq name (concat leaf "<" (int-to-string (setq num (1+ num))) ">")))
2050     name))
2051
2052 (defun gnus-ephemeral-group-p (group)
2053   "Say whether GROUP is ephemeral or not."
2054   (gnus-group-get-parameter group 'quit-config))
2055
2056 (defun gnus-group-quit-config (group)
2057   "Return the quit-config of GROUP."
2058   (gnus-group-get-parameter group 'quit-config))
2059
2060 (defun gnus-kill-ephemeral-group (group)
2061   "Remove ephemeral GROUP from relevant structures."
2062   (gnus-sethash group nil gnus-newsrc-hashtb))
2063
2064 (defun gnus-simplify-mode-line ()
2065   "Make mode lines a bit simpler."
2066   (setq mode-line-modified "-- ")
2067   (when (listp mode-line-format)
2068     (make-local-variable 'mode-line-format)
2069     (setq mode-line-format (copy-sequence mode-line-format))
2070     (when (equal (nth 3 mode-line-format) "   ")
2071       (setcar (nthcdr 3 mode-line-format) " "))))
2072
2073 ;;; Servers and groups.
2074
2075 (defsubst gnus-server-add-address (method)
2076   (let ((method-name (symbol-name (car method))))
2077     (if (and (memq 'address (assoc method-name gnus-valid-select-methods))
2078              (not (assq (intern (concat method-name "-address")) method))
2079              (memq 'physical-address (assq (car method)
2080                                            gnus-valid-select-methods)))
2081         (append method (list (list (intern (concat method-name "-address"))
2082                                    (nth 1 method))))
2083       method)))
2084
2085 (defsubst gnus-server-get-method (group method)
2086   ;; Input either a server name, and extended server name, or a
2087   ;; select method, and return a select method.
2088   (cond ((stringp method)
2089          (gnus-server-to-method method))
2090         ((equal method gnus-select-method)
2091          gnus-select-method)
2092         ((and (stringp (car method)) group)
2093          (gnus-server-extend-method group method))
2094         ((and method (not group)
2095               (equal (cadr method) ""))
2096          method)
2097         (t
2098          (gnus-server-add-address method))))
2099
2100 (defun gnus-server-to-method (server)
2101   "Map virtual server names to select methods."
2102   (or
2103    ;; Is this a method, perhaps?
2104    (and server (listp server) server)
2105    ;; Perhaps this is the native server?
2106    (and (equal server "native") gnus-select-method)
2107    ;; It should be in the server alist.
2108    (cdr (assoc server gnus-server-alist))
2109    ;; It could be in the predefined server alist.
2110    (cdr (assoc server gnus-predefined-server-alist))
2111    ;; If not, we look through all the opened server
2112    ;; to see whether we can find it there.
2113    (let ((opened gnus-opened-servers))
2114      (while (and opened
2115                  (not (equal server (format "%s:%s" (caaar opened)
2116                                             (cadaar opened)))))
2117        (pop opened))
2118      (caar opened))))
2119
2120 (defmacro gnus-method-equal (ss1 ss2)
2121   "Say whether two servers are equal."
2122   `(let ((s1 ,ss1)
2123          (s2 ,ss2))
2124      (or (equal s1 s2)
2125          (and (= (length s1) (length s2))
2126               (progn
2127                 (while (and s1 (member (car s1) s2))
2128                   (setq s1 (cdr s1)))
2129                 (null s1))))))
2130
2131 (defun gnus-server-equal (m1 m2)
2132   "Say whether two methods are equal."
2133   (let ((m1 (cond ((null m1) gnus-select-method)
2134                   ((stringp m1) (gnus-server-to-method m1))
2135                   (t m1)))
2136         (m2 (cond ((null m2) gnus-select-method)
2137                   ((stringp m2) (gnus-server-to-method m2))
2138                   (t m2))))
2139     (gnus-method-equal m1 m2)))
2140
2141 (defun gnus-servers-using-backend (backend)
2142   "Return a list of known servers using BACKEND."
2143   (let ((opened gnus-opened-servers)
2144         out)
2145     (while opened
2146       (when (eq backend (caaar opened))
2147         (push (caar opened) out))
2148       (pop opened))
2149     out))
2150
2151 (defun gnus-archive-server-wanted-p ()
2152   "Say whether the user wants to use the archive server."
2153   (cond
2154    ((or (not gnus-message-archive-method)
2155         (not gnus-message-archive-group))
2156     nil)
2157    ((and gnus-message-archive-method gnus-message-archive-group)
2158     t)
2159    (t
2160     (let ((active (cadr (assq 'nnfolder-active-file
2161                               gnus-message-archive-method))))
2162       (and active
2163            (file-exists-p active))))))
2164
2165 (defun gnus-group-prefixed-name (group method)
2166   "Return the whole name from GROUP and METHOD."
2167   (and (stringp method) (setq method (gnus-server-to-method method)))
2168   (if (not method)
2169       group
2170     (concat (format "%s" (car method))
2171             (when (and
2172                    (or (assoc (format "%s" (car method))
2173                               (gnus-methods-using 'address))
2174                        (gnus-server-equal method gnus-message-archive-method))
2175                    (nth 1 method)
2176                    (not (string= (nth 1 method) "")))
2177               (concat "+" (nth 1 method)))
2178             ":" group)))
2179
2180 (defun gnus-group-real-prefix (group)
2181   "Return the prefix of the current group name."
2182   (if (string-match "^[^:]+:" group)
2183       (substring group 0 (match-end 0))
2184     ""))
2185
2186 (defun gnus-group-method (group)
2187   "Return the server or method used for selecting GROUP.
2188 You should probably use `gnus-find-method-for-group' instead."
2189   (let ((prefix (gnus-group-real-prefix group)))
2190     (if (equal prefix "")
2191         gnus-select-method
2192       (let ((servers gnus-opened-servers)
2193             (server "")
2194             backend possible found)
2195         (if (string-match "^[^\\+]+\\+" prefix)
2196             (setq backend (intern (substring prefix 0 (1- (match-end 0))))
2197                   server (substring prefix (match-end 0) (1- (length prefix))))
2198           (setq backend (intern (substring prefix 0 (1- (length prefix))))))
2199         (while servers
2200           (when (eq (caaar servers) backend)
2201             (setq possible (caar servers))
2202             (when (equal (cadaar servers) server)
2203               (setq found (caar servers))))
2204           (pop servers))
2205         (or (car (rassoc found gnus-server-alist))
2206             found
2207             (car (rassoc possible gnus-server-alist))
2208             possible
2209             (list backend server))))))
2210
2211 (defsubst gnus-secondary-method-p (method)
2212   "Return whether METHOD is a secondary select method."
2213   (let ((methods gnus-secondary-select-methods)
2214         (gmethod (gnus-server-get-method nil method)))
2215     (while (and methods
2216                 (not (equal (gnus-server-get-method nil (car methods))
2217                             gmethod)))
2218       (setq methods (cdr methods)))
2219     methods))
2220
2221 (defun gnus-group-foreign-p (group)
2222   "Say whether a group is foreign or not."
2223   (and (not (gnus-group-native-p group))
2224        (not (gnus-group-secondary-p group))))
2225
2226 (defun gnus-group-native-p (group)
2227   "Say whether the group is native or not."
2228   (not (string-match ":" group)))
2229
2230 (defun gnus-group-secondary-p (group)
2231   "Say whether the group is secondary or not."
2232   (gnus-secondary-method-p (gnus-find-method-for-group group)))
2233
2234 (defun gnus-group-find-parameter (group &optional symbol)
2235   "Return the group parameters for GROUP.
2236 If SYMBOL, return the value of that symbol in the group parameters."
2237   (save-excursion
2238     (set-buffer gnus-group-buffer)
2239     (let ((parameters (funcall gnus-group-get-parameter-function group)))
2240       (if symbol
2241           (gnus-group-parameter-value parameters symbol)
2242         parameters))))
2243
2244 (defun gnus-group-get-parameter (group &optional symbol)
2245   "Return the group parameters for GROUP.
2246 If SYMBOL, return the value of that symbol in the group parameters."
2247   (let ((params (gnus-info-params (gnus-get-info group))))
2248     (if symbol
2249         (gnus-group-parameter-value params symbol)
2250       params)))
2251
2252 (defun gnus-group-parameter-value (params symbol)
2253   "Return the value of SYMBOL in group PARAMS."
2254   (or (car (memq symbol params))        ; It's either a simple symbol
2255       (cdr (assq symbol params))))      ; or a cons.
2256
2257 (defun gnus-group-add-parameter (group param)
2258   "Add parameter PARAM to GROUP."
2259   (let ((info (gnus-get-info group)))
2260     (when info
2261       (gnus-group-remove-parameter group (if (consp param) (car param) param))
2262       ;; Cons the new param to the old one and update.
2263       (gnus-group-set-info (cons param (gnus-info-params info))
2264                            group 'params))))
2265
2266 (defun gnus-group-set-parameter (group name value)
2267   "Set parameter NAME to VALUE in GROUP."
2268   (let ((info (gnus-get-info group)))
2269     (when info
2270       (gnus-group-remove-parameter group name)
2271       (let ((old-params (gnus-info-params info))
2272             (new-params (list (cons name value))))
2273         (while old-params
2274           (when (or (not (listp (car old-params)))
2275                     (not (eq (caar old-params) name)))
2276             (setq new-params (append new-params (list (car old-params)))))
2277           (setq old-params (cdr old-params)))
2278         (gnus-group-set-info new-params group 'params)))))
2279
2280 (defun gnus-group-remove-parameter (group name)
2281   "Remove parameter NAME from GROUP."
2282   (let ((info (gnus-get-info group)))
2283     (when info
2284       (let ((params (gnus-info-params info)))
2285         (when params
2286           (setq params (delq name params))
2287           (while (assq name params)
2288             (setq params (delq (assq name params) params)))
2289           (gnus-info-set-params info params))))))
2290
2291 (defun gnus-group-add-score (group &optional score)
2292   "Add SCORE to the GROUP score.
2293 If SCORE is nil, add 1 to the score of GROUP."
2294   (let ((info (gnus-get-info group)))
2295     (when info
2296       (gnus-info-set-score info (+ (gnus-info-score info) (or score 1))))))
2297
2298 ;; Function written by Stainless Steel Rat <ratinox@peorth.gweep.net>
2299 (defun gnus-short-group-name (group &optional levels)
2300   "Collapse GROUP name LEVELS.
2301 Select methods are stripped and any remote host name is stripped down to
2302 just the host name."
2303   (let* ((name "") (foreign "") (depth -1) (skip 1)
2304          (levels (or levels
2305                      (progn
2306                        (while (string-match "\\." group skip)
2307                          (setq skip (match-end 0)
2308                                depth (+ depth 1)))
2309                        depth))))
2310     ;; separate foreign select method from group name and collapse.
2311     ;; if method contains a server, collapse to non-domain server name,
2312     ;; otherwise collapse to select method
2313     (when (string-match ":" group)
2314       (cond ((string-match "+" group)
2315              (let* ((plus (string-match "+" group))
2316                     (colon (string-match ":" group (or plus 0)))
2317                     (dot (string-match "\\." group)))
2318                (setq foreign (concat
2319                               (substring group (+ 1 plus)
2320                                          (cond ((null dot) colon)
2321                                                ((< colon dot) colon)
2322                                                ((< dot colon) dot)))
2323                               ":")
2324                      group (substring group (+ 1 colon)))))
2325             (t
2326              (let* ((colon (string-match ":" group)))
2327                (setq foreign (concat (substring group 0 (+ 1 colon)))
2328                      group (substring group (+ 1 colon)))))))
2329     ;; collapse group name leaving LEVELS uncollapsed elements
2330     (while group
2331       (if (and (string-match "\\." group) (> levels 0))
2332           (setq name (concat name (substring group 0 1))
2333                 group (substring group (match-end 0))
2334                 levels (- levels 1)
2335                 name (concat name "."))
2336         (setq name (concat foreign name group)
2337               group nil)))
2338     name))
2339
2340 (defun gnus-narrow-to-body ()
2341   "Narrow to the body of an article."
2342   (narrow-to-region
2343    (progn
2344      (goto-char (point-min))
2345      (or (search-forward "\n\n" nil t)
2346          (point-max)))
2347    (point-max)))
2348
2349 \f
2350 ;;;
2351 ;;; Kill file handling.
2352 ;;;
2353
2354 (defun gnus-apply-kill-file ()
2355   "Apply a kill file to the current newsgroup.
2356 Returns the number of articles marked as read."
2357   (if (or (file-exists-p (gnus-newsgroup-kill-file nil))
2358           (file-exists-p (gnus-newsgroup-kill-file gnus-newsgroup-name)))
2359       (gnus-apply-kill-file-internal)
2360     0))
2361
2362 (defun gnus-kill-save-kill-buffer ()
2363   (let ((file (gnus-newsgroup-kill-file gnus-newsgroup-name)))
2364     (when (get-file-buffer file)
2365       (save-excursion
2366         (set-buffer (get-file-buffer file))
2367         (when (buffer-modified-p)
2368           (save-buffer))
2369         (kill-buffer (current-buffer))))))
2370
2371 (defcustom gnus-kill-file-name "KILL"
2372   "Suffix of the kill files."
2373   :group 'gnus-score-kill
2374   :group 'gnus-score-files
2375   :type 'string)
2376
2377 (defun gnus-newsgroup-kill-file (newsgroup)
2378   "Return the name of a kill file name for NEWSGROUP.
2379 If NEWSGROUP is nil, return the global kill file name instead."
2380   (cond
2381    ;; The global KILL file is placed at top of the directory.
2382    ((or (null newsgroup)
2383         (string-equal newsgroup ""))
2384     (expand-file-name gnus-kill-file-name
2385                       gnus-kill-files-directory))
2386    ;; Append ".KILL" to newsgroup name.
2387    ((gnus-use-long-file-name 'not-kill)
2388     (expand-file-name (concat (gnus-newsgroup-savable-name newsgroup)
2389                               "." gnus-kill-file-name)
2390                       gnus-kill-files-directory))
2391    ;; Place "KILL" under the hierarchical directory.
2392    (t
2393     (expand-file-name (concat (gnus-newsgroup-directory-form newsgroup)
2394                               "/" gnus-kill-file-name)
2395                       gnus-kill-files-directory))))
2396
2397 ;;; Server things.
2398
2399 (defun gnus-member-of-valid (symbol group)
2400   "Find out if GROUP has SYMBOL as part of its \"valid\" spec."
2401   (memq symbol (assoc
2402                 (symbol-name (car (gnus-find-method-for-group group)))
2403                 gnus-valid-select-methods)))
2404
2405 (defun gnus-method-option-p (method option)
2406   "Return non-nil if select METHOD has OPTION as a parameter."
2407   (when (stringp method)
2408     (setq method (gnus-server-to-method method)))
2409   (memq option (assoc (format "%s" (car method))
2410                       gnus-valid-select-methods)))
2411
2412 (defun gnus-similar-server-opened (method)
2413   (let ((opened gnus-opened-servers))
2414     (while (and method opened)
2415       (when (and (equal (cadr method) (cadaar opened))
2416                  (not (equal method (caar opened))))
2417         (setq method nil))
2418       (pop opened))
2419     (not method)))
2420
2421 (defun gnus-server-extend-method (group method)
2422   ;; This function "extends" a virtual server.  If the server is
2423   ;; "hello", and the select method is ("hello" (my-var "something"))
2424   ;; in the group "alt.alt", this will result in a new virtual server
2425   ;; called "hello+alt.alt".
2426   (if (or (not (inline (gnus-similar-server-opened method)))
2427           (not (cddr method)))
2428       method
2429     `(,(car method) ,(concat (cadr method) "+" group)
2430       (,(intern (format "%s-address" (car method))) ,(cadr method))
2431       ,@(cddr method))))
2432
2433 (defun gnus-server-status (method)
2434   "Return the status of METHOD."
2435   (nth 1 (assoc method gnus-opened-servers)))
2436
2437 (defun gnus-group-name-to-method (group)
2438   "Guess a select method based on GROUP."
2439   (if (string-match ":" group)
2440       (let ((server (substring group 0 (match-beginning 0))))
2441         (if (string-match "\\+" server)
2442             (list (intern (substring server 0 (match-beginning 0)))
2443                   (substring server (match-end 0)))
2444           (list (intern server) "")))
2445     gnus-select-method))
2446
2447 (defun gnus-find-method-for-group (group &optional info)
2448   "Find the select method that GROUP uses."
2449   (or gnus-override-method
2450       (and (not group)
2451            gnus-select-method)
2452       (let ((info (or info (gnus-get-info group)))
2453             method)
2454         (if (or (not info)
2455                 (not (setq method (gnus-info-method info)))
2456                 (equal method "native"))
2457             gnus-select-method
2458           (setq method
2459                 (cond ((stringp method)
2460                        (inline (gnus-server-to-method method)))
2461                       ((stringp (cadr method))
2462                        (inline (gnus-server-extend-method group method)))
2463                       (t
2464                        method)))
2465           (cond ((equal (cadr method) "")
2466                  method)
2467                 ((null (cadr method))
2468                  (list (car method) ""))
2469                 (t
2470                  (gnus-server-add-address method)))))))
2471
2472 (defun gnus-methods-using (feature)
2473   "Find all methods that have FEATURE."
2474   (let ((valids gnus-valid-select-methods)
2475         outs)
2476     (while valids
2477       (when (memq feature (car valids))
2478         (push (car valids) outs))
2479       (setq valids (cdr valids)))
2480     outs))
2481
2482 (defun gnus-read-group (prompt &optional default)
2483   "Prompt the user for a group name.
2484 Disallow illegal group names."
2485   (let ((prefix "")
2486         group)
2487     (while (not group)
2488       (when (string-match
2489              "[: `'\"/]\\|^$"
2490              (setq group (read-string (concat prefix prompt)
2491                                       (cons (or default "") 0)
2492                                       'gnus-group-history)))
2493         (setq prefix (format "Illegal group name: \"%s\".  " group)
2494               group nil)))
2495     group))
2496
2497 (defun gnus-read-method (prompt)
2498   "Prompt the user for a method.
2499 Allow completion over sensible values."
2500   (let ((method
2501          (completing-read
2502           prompt (append gnus-valid-select-methods gnus-predefined-server-alist
2503                          gnus-server-alist)
2504           nil t nil 'gnus-method-history)))
2505     (cond
2506      ((equal method "")
2507       (setq method gnus-select-method))
2508      ((assoc method gnus-valid-select-methods)
2509       (list (intern method)
2510             (if (memq 'prompt-address
2511                       (assoc method gnus-valid-select-methods))
2512                 (read-string "Address: ")
2513               "")))
2514      ((assoc method gnus-server-alist)
2515       method)
2516      (t
2517       (list (intern method) "")))))
2518
2519 ;;; User-level commands.
2520
2521 ;;;###autoload
2522 (defun gnus-slave-no-server (&optional arg)
2523   "Read network news as a slave, without connecting to local server"
2524   (interactive "P")
2525   (gnus-no-server arg t))
2526
2527 ;;;###autoload
2528 (defun gnus-no-server (&optional arg slave)
2529   "Read network news.
2530 If ARG is a positive number, Gnus will use that as the
2531 startup level.  If ARG is nil, Gnus will be started at level 2.
2532 If ARG is non-nil and not a positive number, Gnus will
2533 prompt the user for the name of an NNTP server to use.
2534 As opposed to `gnus', this command will not connect to the local server."
2535   (interactive "P")
2536   (gnus-no-server-1 arg slave))
2537
2538 ;;;###autoload
2539 (defun gnus-slave (&optional arg)
2540   "Read news as a slave."
2541   (interactive "P")
2542   (gnus arg nil 'slave))
2543
2544 ;;;###autoload
2545 (defun gnus-other-frame (&optional arg)
2546   "Pop up a frame to read news."
2547   (interactive "P")
2548   (let ((window (get-buffer-window gnus-group-buffer)))
2549     (cond (window
2550            (select-frame (window-frame window)))
2551           ((= (length (frame-list)) 1)
2552            (select-frame (make-frame)))
2553           (t
2554            (other-frame 1))))
2555   (gnus arg))
2556
2557 ;;;###autoload
2558 (defun gnus (&optional arg dont-connect slave)
2559   "Read network news.
2560 If ARG is non-nil and a positive number, Gnus will use that as the
2561 startup level.  If ARG is non-nil and not a positive number, Gnus will
2562 prompt the user for the name of an NNTP server to use."
2563   (interactive "P")
2564   (gnus-1 arg dont-connect slave))
2565
2566 ;; Allow redefinition of Gnus functions.
2567
2568 (gnus-ems-redefine)
2569
2570 (provide 'gnus)
2571
2572 ;;; gnus.el ends here