code.delx.au - gnu-emacs/blob - lisp/gnus/gnus-sum.el

   1 ;;; gnus-sum.el --- summary mode commands for Gnus
   2
   3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   5
   6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   7 ;; Keywords: news
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Commentary:
  27
  28 ;;; Code:
  29
  30 ;; For Emacs < 22.2.
  31 (eval-and-compile
  32   (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
  33 (eval-when-compile
  34   (require 'cl))
  35
  36 (defvar tool-bar-mode)
  37 (defvar gnus-tmp-header)
  38
  39 (require 'gnus)
  40 (require 'gnus-group)
  41 (require 'gnus-spec)
  42 (require 'gnus-range)
  43 (require 'gnus-int)
  44 (require 'gnus-undo)
  45 (require 'gnus-util)
  46 (require 'gmm-utils)
  47 (require 'mm-decode)
  48 (require 'nnoo)
  49
  50 (autoload 'gnus-summary-limit-include-cached "gnus-cache" nil t)
  51 (autoload 'gnus-cache-write-active "gnus-cache")
  52 (autoload 'gnus-mailing-list-insinuate "gnus-ml" nil t)
  53 (autoload 'turn-on-gnus-mailing-list-mode "gnus-ml" nil t)
  54 (autoload 'gnus-pick-line-number "gnus-salt" nil t)
  55 (autoload 'mm-uu-dissect "mm-uu")
  56 (autoload 'gnus-article-outlook-deuglify-article "deuglify"
  57   "Deuglify broken Outlook (Express) articles and redisplay."
  58   t)
  59 (autoload 'gnus-article-outlook-unwrap-lines "deuglify" nil t)
  60 (autoload 'gnus-article-outlook-repair-attribution "deuglify" nil t)
  61 (autoload 'gnus-article-outlook-rearrange-citation "deuglify" nil t)
  62
  63 (defcustom gnus-kill-summary-on-exit t
  64   "*If non-nil, kill the summary buffer when you exit from it.
  65 If nil, the summary will become a \"*Dead Summary*\" buffer, and
  66 it will be killed sometime later."
  67   :group 'gnus-summary-exit
  68   :type 'boolean)
  69
  70 (defcustom gnus-summary-next-group-on-exit t
  71   "If non-nil, go to the next unread newsgroup on summary exit.
  72 See `gnus-group-goto-unread'."
  73   :link '(custom-manual "(gnus)Group Maneuvering")
  74   :group 'gnus-summary-exit
  75   :version "23.1" ;; No Gnus
  76   :type 'boolean)
  77
  78 (defcustom gnus-fetch-old-headers nil
  79   "*Non-nil means that Gnus will try to build threads by grabbing old headers.
  80 If an unread article in the group refers to an older, already
  81 read (or just marked as read) article, the old article will not
  82 normally be displayed in the Summary buffer.  If this variable is
  83 t, Gnus will attempt to grab the headers to the old articles, and
  84 thereby build complete threads.  If it has the value `some', all
  85 old headers will be fetched but only enough headers to connect
  86 otherwise loose threads will be displayed.  This variable can
  87 also be a number.  In that case, no more than that number of old
  88 headers will be fetched.  If it has the value `invisible', all
  89 old headers will be fetched, but none will be displayed.
  90
  91 The server has to support NOV for any of this to work.
  92
  93 This feature can seriously impact performance it ignores all
  94 locally cached header entries."
  95   :group 'gnus-thread
  96   :type '(choice (const :tag "off" nil)
  97                  (const :tag "on" t)
  98                  (const some)
  99                  (const invisible)
 100                  number
 101                  (sexp :menu-tag "other" t)))
 102
 103 (defcustom gnus-refer-thread-limit 500
 104   "*The number of old headers to fetch when doing \\<gnus-summary-mode-map>\\[gnus-summary-refer-thread].
 105 If t, fetch all the available old headers."
 106   :group 'gnus-thread
 107   :type '(choice number
 108                  (sexp :menu-tag "other" t)))
 109
 110 (defcustom gnus-summary-make-false-root 'adopt
 111   "*nil means that Gnus won't gather loose threads.
 112 If the root of a thread has expired or been read in a previous
 113 session, the information necessary to build a complete thread has been
 114 lost.  Instead of having many small sub-threads from this original thread
 115 scattered all over the summary buffer, Gnus can gather them.
 116
 117 If non-nil, Gnus will try to gather all loose sub-threads from an
 118 original thread into one large thread.
 119
 120 If this variable is non-nil, it should be one of `none', `adopt',
 121 `dummy' or `empty'.
 122
 123 If this variable is `none', Gnus will not make a false root, but just
 124 present the sub-threads after another.
 125 If this variable is `dummy', Gnus will create a dummy root that will
 126 have all the sub-threads as children.
 127 If this variable is `adopt', Gnus will make one of the \"children\"
 128 the parent and mark all the step-children as such.
 129 If this variable is `empty', the \"children\" are printed with empty
 130 subject fields.  (Or rather, they will be printed with a string
 131 given by the `gnus-summary-same-subject' variable.)"
 132   :group 'gnus-thread
 133   :type '(choice (const :tag "off" nil)
 134                  (const none)
 135                  (const dummy)
 136                  (const adopt)
 137                  (const empty)))
 138
 139 (defcustom gnus-summary-make-false-root-always nil
 140   "Always make a false dummy root."
 141   :version "22.1"
 142   :group 'gnus-thread
 143   :type 'boolean)
 144
 145 (defcustom gnus-summary-gather-exclude-subject "^ *$\\|^(none)$"
 146   "*A regexp to match subjects to be excluded from loose thread gathering.
 147 As loose thread gathering is done on subjects only, that means that
 148 there can be many false gatherings performed.  By rooting out certain
 149 common subjects, gathering might become saner."
 150   :group 'gnus-thread
 151   :type 'regexp)
 152
 153 (defcustom gnus-summary-gather-subject-limit nil
 154   "*Maximum length of subject comparisons when gathering loose threads.
 155 Use nil to compare full subjects.  Setting this variable to a low
 156 number will help gather threads that have been corrupted by
 157 newsreaders chopping off subject lines, but it might also mean that
 158 unrelated articles that have subject that happen to begin with the
 159 same few characters will be incorrectly gathered.
 160
 161 If this variable is `fuzzy', Gnus will use a fuzzy algorithm when
 162 comparing subjects."
 163   :group 'gnus-thread
 164   :type '(choice (const :tag "off" nil)
 165                  (const fuzzy)
 166                  (sexp :menu-tag "on" t)))
 167
 168 (defcustom gnus-simplify-subject-functions nil
 169   "List of functions taking a string argument that simplify subjects.
 170 The functions are applied recursively.
 171
 172 Useful functions to put in this list include:
 173 `gnus-simplify-subject-re', `gnus-simplify-subject-fuzzy',
 174 `gnus-simplify-whitespace', and `gnus-simplify-all-whitespace'."
 175   :group 'gnus-thread
 176   :type '(repeat function))
 177
 178 (defcustom gnus-simplify-ignored-prefixes nil
 179   "*Remove matches for this regexp from subject lines when simplifying fuzzily."
 180   :group 'gnus-thread
 181   :type '(choice (const :tag "off" nil)
 182                  regexp))
 183
 184 (defcustom gnus-build-sparse-threads nil
 185   "*If non-nil, fill in the gaps in threads.
 186 If `some', only fill in the gaps that are needed to tie loose threads
 187 together.  If `more', fill in all leaf nodes that Gnus can find.  If
 188 non-nil and non-`some', fill in all gaps that Gnus manages to guess."
 189   :group 'gnus-thread
 190   :type '(choice (const :tag "off" nil)
 191                  (const some)
 192                  (const more)
 193                  (sexp :menu-tag "all" t)))
 194
 195 (defcustom gnus-summary-thread-gathering-function
 196   'gnus-gather-threads-by-subject
 197   "*Function used for gathering loose threads.
 198 There are two pre-defined functions: `gnus-gather-threads-by-subject',
 199 which only takes Subjects into consideration; and
 200 `gnus-gather-threads-by-references', which compared the References
 201 headers of the articles to find matches."
 202   :group 'gnus-thread
 203   :type '(radio (function-item gnus-gather-threads-by-subject)
 204                 (function-item gnus-gather-threads-by-references)
 205                 (function :tag "other")))
 206
 207 (defcustom gnus-summary-same-subject ""
 208   "*String indicating that the current article has the same subject as the previous.
 209 This variable will only be used if the value of
 210 `gnus-summary-make-false-root' is `empty'."
 211   :group 'gnus-summary-format
 212   :type 'string)
 213
 214 (defcustom gnus-summary-goto-unread t
 215   "*If t, many commands will go to the next unread article.
 216 This applies to marking commands as well as other commands that
 217 \"naturally\" select the next article, like, for instance, `SPC' at
 218 the end of an article.
 219
 220 If nil, the marking commands do NOT go to the next unread article
 221 \(they go to the next article instead).  If `never', commands that
 222 usually go to the next unread article, will go to the next article,
 223 whether it is read or not."
 224   :group 'gnus-summary-marks
 225   :link '(custom-manual "(gnus)Setting Marks")
 226   :type '(choice (const :tag "off" nil)
 227                  (const never)
 228                  (sexp :menu-tag "on" t)))
 229
 230 (defcustom gnus-summary-default-score 0
 231   "*Default article score level.
 232 All scores generated by the score files will be added to this score.
 233 If this variable is nil, scoring will be disabled."
 234   :group 'gnus-score-default
 235   :type '(choice (const :tag "disable")
 236                  integer))
 237
 238 (defcustom gnus-summary-default-high-score 0
 239   "*Default threshold for a high scored article.
 240 An article will be highlighted as high scored if its score is greater
 241 than this score."
 242   :version "22.1"
 243   :group 'gnus-score-default
 244   :type 'integer)
 245
 246 (defcustom gnus-summary-default-low-score 0
 247   "*Default threshold for a low scored article.
 248 An article will be highlighted as low scored if its score is smaller
 249 than this score."
 250   :version "22.1"
 251   :group 'gnus-score-default
 252   :type 'integer)
 253
 254 (defcustom gnus-summary-zcore-fuzz 0
 255   "*Fuzziness factor for the zcore in the summary buffer.
 256 Articles with scores closer than this to `gnus-summary-default-score'
 257 will not be marked."
 258   :group 'gnus-summary-format
 259   :type 'integer)
 260
 261 (defcustom gnus-simplify-subject-fuzzy-regexp nil
 262   "*Strings to be removed when doing fuzzy matches.
 263 This can either be a regular expression or list of regular expressions
 264 that will be removed from subject strings if fuzzy subject
 265 simplification is selected."
 266   :group 'gnus-thread
 267   :type '(repeat regexp))
 268
 269 (defcustom gnus-show-threads t
 270   "*If non-nil, display threads in summary mode."
 271   :group 'gnus-thread
 272   :type 'boolean)
 273
 274 (defcustom gnus-thread-hide-subtree nil
 275   "*If non-nil, hide all threads initially.
 276 This can be a predicate specifier which says which threads to hide.
 277 If threads are hidden, you have to run the command
 278 `gnus-summary-show-thread' by hand or select an article."
 279   :group 'gnus-thread
 280   :type '(radio (sexp :format "Non-nil\n"
 281                       :match (lambda (widget value)
 282                                (not (or (consp value) (functionp value))))
 283                       :value t)
 284                 (const nil)
 285                 (sexp :tag "Predicate specifier")))
 286
 287 (defcustom gnus-thread-hide-killed t
 288   "*If non-nil, hide killed threads automatically."
 289   :group 'gnus-thread
 290   :type 'boolean)
 291
 292 (defcustom gnus-thread-ignore-subject t
 293   "*If non-nil, which is the default, ignore subjects and do all threading based on the Reference header.
 294 If nil, articles that have different subjects from their parents will
 295 start separate threads."
 296   :group 'gnus-thread
 297   :type 'boolean)
 298
 299 (defcustom gnus-thread-operation-ignore-subject t
 300   "*If non-nil, subjects will be ignored when doing thread commands.
 301 This affects commands like `gnus-summary-kill-thread' and
 302 `gnus-summary-lower-thread'.
 303
 304 If this variable is nil, articles in the same thread with different
 305 subjects will not be included in the operation in question.  If this
 306 variable is `fuzzy', only articles that have subjects that are fuzzily
 307 equal will be included."
 308   :group 'gnus-thread
 309   :type '(choice (const :tag "off" nil)
 310                  (const fuzzy)
 311                  (sexp :tag "on" t)))
 312
 313 (defcustom gnus-thread-indent-level 4
 314   "*Number that says how much each sub-thread should be indented."
 315   :group 'gnus-thread
 316   :type 'integer)
 317
 318 (defcustom gnus-auto-extend-newsgroup t
 319   "*If non-nil, extend newsgroup forward and backward when requested."
 320   :group 'gnus-summary-choose
 321   :type 'boolean)
 322
 323 (defcustom gnus-auto-select-first t
 324   "If non-nil, select an article on group entry.
 325 An article is selected automatically when entering a group
 326 e.g. with \\<gnus-group-mode-map>\\[gnus-group-read-group], or via `gnus-summary-next-page' or
 327 `gnus-summary-catchup-and-goto-next-group'.
 328
 329 Which article is selected is controlled by the variable
 330 `gnus-auto-select-subject'.
 331
 332 If you want to prevent automatic selection of articles in some
 333 newsgroups, set the variable to nil in `gnus-select-group-hook'."
 334   ;; Commands include...
 335   ;; \\<gnus-group-mode-map>\\[gnus-group-read-group]
 336   ;; \\<gnus-summary-mode-map>\\[gnus-summary-next-page]
 337   ;; \\<gnus-summary-mode-map>\\[gnus-summary-catchup-and-goto-next-group]
 338   :group 'gnus-group-select
 339   :type '(choice (const :tag "none" nil)
 340                  (sexp :menu-tag "first" t)))
 341
 342 (defcustom gnus-auto-select-subject 'unread
 343   "*Says what subject to place under point when entering a group.
 344
 345 This variable can either be the symbols `first' (place point on the
 346 first subject), `unread' (place point on the subject line of the first
 347 unread article), `best' (place point on the subject line of the
 348 higest-scored article), `unseen' (place point on the subject line of
 349 the first unseen article), `unseen-or-unread' (place point on the subject
 350 line of the first unseen article or, if all article have been seen, on the
 351 subject line of the first unread article), or a function to be called to
 352 place point on some subject line."
 353   :version "22.1"
 354   :group 'gnus-group-select
 355   :type '(choice (const best)
 356                  (const unread)
 357                  (const first)
 358                  (const unseen)
 359                  (const unseen-or-unread)))
 360
 361 (defcustom gnus-auto-select-next t
 362   "*If non-nil, offer to go to the next group from the end of the previous.
 363 If the value is t and the next newsgroup is empty, Gnus will exit
 364 summary mode and go back to group mode.  If the value is neither nil
 365 nor t, Gnus will select the following unread newsgroup.  In
 366 particular, if the value is the symbol `quietly', the next unread
 367 newsgroup will be selected without any confirmation, and if it is
 368 `almost-quietly', the next group will be selected without any
 369 confirmation if you are located on the last article in the group.
 370 Finally, if this variable is `slightly-quietly', the `\\<gnus-summary-mode-map>\\[gnus-summary-catchup-and-goto-next-group]' command
 371 will go to the next group without confirmation."
 372   :group 'gnus-summary-maneuvering
 373   :type '(choice (const :tag "off" nil)
 374                  (const quietly)
 375                  (const almost-quietly)
 376                  (const slightly-quietly)
 377                  (sexp :menu-tag "on" t)))
 378
 379 (defcustom gnus-auto-select-same nil
 380   "*If non-nil, select the next article with the same subject.
 381 If there are no more articles with the same subject, go to
 382 the first unread article."
 383   :group 'gnus-summary-maneuvering
 384   :type 'boolean)
 385
 386 (defcustom gnus-auto-select-on-ephemeral-exit 'next-noselect
 387   "What article should be selected after exiting an ephemeral group.
 388 Valid values include:
 389
 390 `next'
 391   Select the next article.
 392 `next-unread'
 393   Select the next unread article.
 394 `next-noselect'
 395   Move the cursor to the next article.  This is the default.
 396 `next-unread-noselect'
 397   Move the cursor to the next unread article.
 398
 399 If it has any other value or there is no next (unread) article, the
 400 article selected before entering to the ephemeral group will appear."
 401   :version "23.1" ;; No Gnus
 402   :group 'gnus-summary-maneuvering
 403   :type '(choice :format "%{%t%}:\n %[Value Menu%] %v"
 404                  (const next) (const next-unread)
 405                  (const next-noselect) (const next-unread-noselect)
 406                  (sexp :tag "other" :value nil)))
 407
 408 (defcustom gnus-auto-goto-ignores 'unfetched
 409   "*Says how to handle unfetched articles when maneuvering.
 410
 411 This variable can either be the symbols nil (maneuver to any
 412 article), `undownloaded' (maneuvering while unplugged ignores articles
 413 that have not been fetched), `always-undownloaded' (maneuvering always
 414 ignores articles that have not been fetched), `unfetched' (maneuvering
 415 ignores articles whose headers have not been fetched).
 416
 417 NOTE: The list of unfetched articles will always be nil when plugged
 418 and, when unplugged, a subset of the undownloaded article list."
 419   :version "22.1"
 420   :group 'gnus-summary-maneuvering
 421   :type '(choice (const :tag "None" nil)
 422                  (const :tag "Undownloaded when unplugged" undownloaded)
 423                  (const :tag "Undownloaded" always-undownloaded)
 424                  (const :tag "Unfetched" unfetched)))
 425
 426 (defcustom gnus-summary-check-current nil
 427   "*If non-nil, consider the current article when moving.
 428 The \"unread\" movement commands will stay on the same line if the
 429 current article is unread."
 430   :group 'gnus-summary-maneuvering
 431   :type 'boolean)
 432
 433 (defcustom gnus-auto-center-summary 2
 434   "*If non-nil, always center the current summary buffer.
 435 In particular, if `vertical' do only vertical recentering.  If non-nil
 436 and non-`vertical', do both horizontal and vertical recentering."
 437   :group 'gnus-summary-maneuvering
 438   :type '(choice (const :tag "none" nil)
 439                  (const vertical)
 440                  (integer :tag "height")
 441                  (sexp :menu-tag "both" t)))
 442
 443 (defvar gnus-auto-center-group t
 444   "*If non-nil, always center the group buffer.")
 445
 446 (defcustom gnus-show-all-headers nil
 447   "*If non-nil, don't hide any headers."
 448   :group 'gnus-article-hiding
 449   :group 'gnus-article-headers
 450   :type 'boolean)
 451
 452 (defcustom gnus-summary-ignore-duplicates nil
 453   "*If non-nil, ignore articles with identical Message-ID headers."
 454   :group 'gnus-summary
 455   :type 'boolean)
 456
 457 (defcustom gnus-single-article-buffer t
 458   "*If non-nil, display all articles in the same buffer.
 459 If nil, each group will get its own article buffer."
 460   :group 'gnus-article-various
 461   :type 'boolean)
 462
 463 (defcustom gnus-break-pages t
 464   "*If non-nil, do page breaking on articles.
 465 The page delimiter is specified by the `gnus-page-delimiter'
 466 variable."
 467   :group 'gnus-article-various
 468   :type 'boolean)
 469
 470 (defcustom gnus-move-split-methods nil
 471   "*Variable used to suggest where articles are to be moved to.
 472 It uses the same syntax as the `gnus-split-methods' variable.
 473 However, whereas `gnus-split-methods' specifies file names as targets,
 474 this variable specifies group names."
 475   :group 'gnus-summary-mail
 476   :type '(repeat (choice (list :value (fun) function)
 477                          (cons :value ("" "") regexp (repeat string))
 478                          (sexp :value nil))))
 479
 480 (defcustom gnus-move-group-prefix-function 'gnus-group-real-prefix
 481   "Function used to compute default prefix for article move/copy/etc prompts.
 482 The function should take one argument, a group name, and return a
 483 string with the suggested prefix."
 484   :group 'gnus-summary-mail
 485   :type 'function)
 486
 487 ;; FIXME: Although the custom type is `character' for the following variables,
 488 ;; using multibyte characters (Latin-1, UTF-8) doesn't work.  -- rs
 489
 490 (defcustom gnus-unread-mark ?           ;Whitespace
 491   "*Mark used for unread articles."
 492   :group 'gnus-summary-marks
 493   :type 'character)
 494
 495 (defcustom gnus-ticked-mark ?!
 496   "*Mark used for ticked articles."
 497   :group 'gnus-summary-marks
 498   :type 'character)
 499
 500 (defcustom gnus-dormant-mark ??
 501   "*Mark used for dormant articles."
 502   :group 'gnus-summary-marks
 503   :type 'character)
 504
 505 (defcustom gnus-del-mark ?r
 506   "*Mark used for del'd articles."
 507   :group 'gnus-summary-marks
 508   :type 'character)
 509
 510 (defcustom gnus-read-mark ?R
 511   "*Mark used for read articles."
 512   :group 'gnus-summary-marks
 513   :type 'character)
 514
 515 (defcustom gnus-expirable-mark ?E
 516   "*Mark used for expirable articles."
 517   :group 'gnus-summary-marks
 518   :type 'character)
 519
 520 (defcustom gnus-killed-mark ?K
 521   "*Mark used for killed articles."
 522   :group 'gnus-summary-marks
 523   :type 'character)
 524
 525 (defcustom gnus-spam-mark ?$
 526   "*Mark used for spam articles."
 527   :version "22.1"
 528   :group 'gnus-summary-marks
 529   :type 'character)
 530
 531 (defcustom gnus-souped-mark ?F
 532   "*Mark used for souped articles."
 533   :group 'gnus-summary-marks
 534   :type 'character)
 535
 536 (defcustom gnus-kill-file-mark ?X
 537   "*Mark used for articles killed by kill files."
 538   :group 'gnus-summary-marks
 539   :type 'character)
 540
 541 (defcustom gnus-low-score-mark ?Y
 542   "*Mark used for articles with a low score."
 543   :group 'gnus-summary-marks
 544   :type 'character)
 545
 546 (defcustom gnus-catchup-mark ?C
 547   "*Mark used for articles that are caught up."
 548   :group 'gnus-summary-marks
 549   :type 'character)
 550
 551 (defcustom gnus-replied-mark ?A
 552   "*Mark used for articles that have been replied to."
 553   :group 'gnus-summary-marks
 554   :type 'character)
 555
 556 (defcustom gnus-forwarded-mark ?F
 557   "*Mark used for articles that have been forwarded."
 558   :version "22.1"
 559   :group 'gnus-summary-marks
 560   :type 'character)
 561
 562 (defcustom gnus-recent-mark ?N
 563   "*Mark used for articles that are recent."
 564   :version "22.1"
 565   :group 'gnus-summary-marks
 566   :type 'character)
 567
 568 (defcustom gnus-cached-mark ?*
 569   "*Mark used for articles that are in the cache."
 570   :group 'gnus-summary-marks
 571   :type 'character)
 572
 573 (defcustom gnus-saved-mark ?S
 574   "*Mark used for articles that have been saved."
 575   :group 'gnus-summary-marks
 576   :type 'character)
 577
 578 (defcustom gnus-unseen-mark ?.
 579   "*Mark used for articles that haven't been seen."
 580   :version "22.1"
 581   :group 'gnus-summary-marks
 582   :type 'character)
 583
 584 (defcustom gnus-no-mark ?               ;Whitespace
 585   "*Mark used for articles that have no other secondary mark."
 586   :version "22.1"
 587   :group 'gnus-summary-marks
 588   :type 'character)
 589
 590 (defcustom gnus-ancient-mark ?O
 591   "*Mark used for ancient articles."
 592   :group 'gnus-summary-marks
 593   :type 'character)
 594
 595 (defcustom gnus-sparse-mark ?Q
 596   "*Mark used for sparsely reffed articles."
 597   :group 'gnus-summary-marks
 598   :type 'character)
 599
 600 (defcustom gnus-canceled-mark ?G
 601   "*Mark used for canceled articles."
 602   :group 'gnus-summary-marks
 603   :type 'character)
 604
 605 (defcustom gnus-duplicate-mark ?M
 606   "*Mark used for duplicate articles."
 607   :group 'gnus-summary-marks
 608   :type 'character)
 609
 610 (defcustom gnus-undownloaded-mark ?-
 611   "*Mark used for articles that weren't downloaded."
 612   :version "22.1"
 613   :group 'gnus-summary-marks
 614   :type 'character)
 615
 616 (defcustom gnus-downloaded-mark ?+
 617   "*Mark used for articles that were downloaded."
 618   :group 'gnus-summary-marks
 619   :type 'character)
 620
 621 (defcustom gnus-downloadable-mark ?%
 622   "*Mark used for articles that are to be downloaded."
 623   :group 'gnus-summary-marks
 624   :type 'character)
 625
 626 (defcustom gnus-unsendable-mark ?=
 627   "*Mark used for articles that won't be sent."
 628   :group 'gnus-summary-marks
 629   :type 'character)
 630
 631 (defcustom gnus-score-over-mark ?+
 632   "*Score mark used for articles with high scores."
 633   :group 'gnus-summary-marks
 634   :type 'character)
 635
 636 (defcustom gnus-score-below-mark ?-
 637   "*Score mark used for articles with low scores."
 638   :group 'gnus-summary-marks
 639   :type 'character)
 640
 641 (defcustom gnus-empty-thread-mark ?     ;Whitespace
 642   "*There is no thread under the article."
 643   :group 'gnus-summary-marks
 644   :type 'character)
 645
 646 (defcustom gnus-not-empty-thread-mark ?=
 647   "*There is a thread under the article."
 648   :group 'gnus-summary-marks
 649   :type 'character)
 650
 651 (defcustom gnus-view-pseudo-asynchronously nil
 652   "*If non-nil, Gnus will view pseudo-articles asynchronously."
 653   :group 'gnus-extract-view
 654   :type 'boolean)
 655
 656 (defcustom gnus-auto-expirable-marks
 657   (list gnus-killed-mark gnus-del-mark gnus-catchup-mark
 658         gnus-low-score-mark gnus-ancient-mark gnus-read-mark
 659         gnus-souped-mark gnus-duplicate-mark)
 660   "*The list of marks converted into expiration if a group is auto-expirable."
 661   :version "21.1"
 662   :group 'gnus-summary
 663   :type '(repeat character))
 664
 665 (defcustom gnus-inhibit-user-auto-expire t
 666   "*If non-nil, user marking commands will not mark an article as expirable, even if the group has auto-expire turned on."
 667   :version "21.1"
 668   :group 'gnus-summary
 669   :type 'boolean)
 670
 671 (defcustom gnus-view-pseudos nil
 672   "*If `automatic', pseudo-articles will be viewed automatically.
 673 If `not-confirm', pseudos will be viewed automatically, and the user
 674 will not be asked to confirm the command."
 675   :group 'gnus-extract-view
 676   :type '(choice (const :tag "off" nil)
 677                  (const automatic)
 678                  (const not-confirm)))
 679
 680 (defcustom gnus-view-pseudos-separately t
 681   "*If non-nil, one pseudo-article will be created for each file to be viewed.
 682 If nil, all files that use the same viewing command will be given as a
 683 list of parameters to that command."
 684   :group 'gnus-extract-view
 685   :type 'boolean)
 686
 687 (defcustom gnus-insert-pseudo-articles t
 688   "*If non-nil, insert pseudo-articles when decoding articles."
 689   :group 'gnus-extract-view
 690   :type 'boolean)
 691
 692 (defcustom gnus-summary-dummy-line-format
 693   "   %(:                             :%) %S\n"
 694   "*The format specification for the dummy roots in the summary buffer.
 695 It works along the same lines as a normal formatting string,
 696 with some simple extensions.
 697
 698 %S  The subject
 699
 700 General format specifiers can also be used.
 701 See `(gnus)Formatting Variables'."
 702   :link '(custom-manual "(gnus)Formatting Variables")
 703   :group 'gnus-threading
 704   :type 'string)
 705
 706 (defcustom gnus-summary-mode-line-format "Gnus: %g [%A] %Z"
 707   "*The format specification for the summary mode line.
 708 It works along the same lines as a normal formatting string,
 709 with some simple extensions:
 710
 711 %G  Group name
 712 %p  Unprefixed group name
 713 %A  Current article number
 714 %z  Current article score
 715 %V  Gnus version
 716 %U  Number of unread articles in the group
 717 %e  Number of unselected articles in the group
 718 %Z  A string with unread/unselected article counts
 719 %g  Shortish group name
 720 %S  Subject of the current article
 721 %u  User-defined spec
 722 %s  Current score file name
 723 %d  Number of dormant articles
 724 %r  Number of articles that have been marked as read in this session
 725 %E  Number of articles expunged by the score files"
 726   :group 'gnus-summary-format
 727   :type 'string)
 728
 729 (defcustom gnus-list-identifiers nil
 730   "Regexp that matches list identifiers to be removed from subject.
 731 This can also be a list of regexps."
 732   :version "21.1"
 733   :group 'gnus-summary-format
 734   :group 'gnus-article-hiding
 735   :type '(choice (const :tag "none" nil)
 736                  (regexp :value ".*")
 737                  (repeat :value (".*") regexp)))
 738
 739 (defcustom gnus-summary-mark-below 0
 740   "*Mark all articles with a score below this variable as read.
 741 This variable is local to each summary buffer and usually set by the
 742 score file."
 743   :group 'gnus-score-default
 744   :type 'integer)
 745
 746 (defun gnus-widget-reversible-match (widget value)
 747   "Ignoring WIDGET, convert VALUE to internal form.
 748 VALUE should have the form `FOO' or `(not FOO)', where FOO is an symbol."
 749   ;; (debug value)
 750   (or (symbolp value)
 751       (and (listp value)
 752            (eq (length value) 2)
 753            (eq (nth 0 value) 'not)
 754            (symbolp (nth 1 value)))))
 755
 756 (defun gnus-widget-reversible-to-internal (widget value)
 757   "Ignoring WIDGET, convert VALUE to internal form.
 758 VALUE should have the form `FOO' or `(not FOO)', where FOO is an atom.
 759 FOO is converted to (FOO nil) and (not FOO) is converted to (FOO t)."
 760   ;; (debug value)
 761   (if (atom value)
 762       (list value nil)
 763     (list (nth 1 value) t)))
 764
 765 (defun gnus-widget-reversible-to-external (widget value)
 766   "Ignoring WIDGET, convert VALUE to external form.
 767 VALUE should have the form `(FOO nil)' or `(FOO t)', where FOO is an atom.
 768 \(FOO  nil) is converted to FOO and (FOO t) is converted to (not FOO)."
 769   ;; (debug value)
 770   (if (nth 1 value)
 771       (list 'not (nth 0 value))
 772     (nth 0 value)))
 773
 774 (define-widget 'gnus-widget-reversible 'group
 775   "A `group' that convert values."
 776   :match 'gnus-widget-reversible-match
 777   :value-to-internal 'gnus-widget-reversible-to-internal
 778   :value-to-external 'gnus-widget-reversible-to-external)
 779
 780 (defcustom gnus-article-sort-functions '(gnus-article-sort-by-number)
 781   "*List of functions used for sorting articles in the summary buffer.
 782
 783 Each function takes two articles and returns non-nil if the first
 784 article should be sorted before the other.  If you use more than one
 785 function, the primary sort function should be the last.  You should
 786 probably always include `gnus-article-sort-by-number' in the list of
 787 sorting functions -- preferably first.  Also note that sorting by date
 788 is often much slower than sorting by number, and the sorting order is
 789 very similar.  (Sorting by date means sorting by the time the message
 790 was sent, sorting by number means sorting by arrival time.)
 791
 792 Each item can also be a list `(not F)' where F is a function;
 793 this reverses the sort order.
 794
 795 Ready-made functions include `gnus-article-sort-by-number',
 796 `gnus-article-sort-by-author', `gnus-article-sort-by-subject',
 797 `gnus-article-sort-by-date', `gnus-article-sort-by-random'
 798 and `gnus-article-sort-by-score'.
 799
 800 When threading is turned on, the variable `gnus-thread-sort-functions'
 801 controls how articles are sorted."
 802   :group 'gnus-summary-sort
 803   :type '(repeat (gnus-widget-reversible
 804                   (choice (function-item gnus-article-sort-by-number)
 805                           (function-item gnus-article-sort-by-author)
 806                           (function-item gnus-article-sort-by-subject)
 807                           (function-item gnus-article-sort-by-date)
 808                           (function-item gnus-article-sort-by-score)
 809                           (function-item gnus-article-sort-by-random)
 810                           (function :tag "other"))
 811                   (boolean :tag "Reverse order"))))
 812
 813
 814 (defcustom gnus-thread-sort-functions '(gnus-thread-sort-by-number)
 815   "*List of functions used for sorting threads in the summary buffer.
 816 By default, threads are sorted by article number.
 817
 818 Each function takes two threads and returns non-nil if the first
 819 thread should be sorted before the other.  If you use more than one
 820 function, the primary sort function should be the last.  You should
 821 probably always include `gnus-thread-sort-by-number' in the list of
 822 sorting functions -- preferably first.  Also note that sorting by date
 823 is often much slower than sorting by number, and the sorting order is
 824 very similar.  (Sorting by date means sorting by the time the message
 825 was sent, sorting by number means sorting by arrival time.)
 826
 827 Each list item can also be a list `(not F)' where F is a
 828 function; this specifies reversed sort order.
 829
 830 Ready-made functions include `gnus-thread-sort-by-number',
 831 `gnus-thread-sort-by-author', `gnus-thread-sort-by-recipient'
 832 `gnus-thread-sort-by-subject', `gnus-thread-sort-by-date',
 833 `gnus-thread-sort-by-score', `gnus-thread-sort-by-most-recent-number',
 834 `gnus-thread-sort-by-most-recent-date', `gnus-thread-sort-by-random',
 835 and `gnus-thread-sort-by-total-score' (see
 836 `gnus-thread-score-function').
 837
 838 When threading is turned off, the variable
 839 `gnus-article-sort-functions' controls how articles are sorted."
 840   :group 'gnus-summary-sort
 841   :type '(repeat
 842           (gnus-widget-reversible
 843            (choice (function-item gnus-thread-sort-by-number)
 844                    (function-item gnus-thread-sort-by-author)
 845                    (function-item gnus-thread-sort-by-recipient)
 846                    (function-item gnus-thread-sort-by-subject)
 847                    (function-item gnus-thread-sort-by-date)
 848                    (function-item gnus-thread-sort-by-score)
 849                    (function-item gnus-thread-sort-by-most-recent-number)
 850                    (function-item gnus-thread-sort-by-most-recent-date)
 851                    (function-item gnus-thread-sort-by-random)
 852                    (function-item gnus-thread-sort-by-total-score)
 853                    (function :tag "other"))
 854            (boolean :tag "Reverse order"))))
 855
 856 (defcustom gnus-thread-score-function '+
 857   "*Function used for calculating the total score of a thread.
 858
 859 The function is called with the scores of the article and each
 860 subthread and should then return the score of the thread.
 861
 862 Some functions you can use are `+', `max', or `min'."
 863   :group 'gnus-summary-sort
 864   :type 'function)
 865
 866 (defcustom gnus-summary-expunge-below nil
 867   "All articles that have a score less than this variable will be expunged.
 868 This variable is local to the summary buffers."
 869   :group 'gnus-score-default
 870   :type '(choice (const :tag "off" nil)
 871                  integer))
 872
 873 (defcustom gnus-thread-expunge-below nil
 874   "All threads that have a total score less than this variable will be expunged.
 875 See `gnus-thread-score-function' for en explanation of what a
 876 \"thread score\" is.
 877
 878 This variable is local to the summary buffers."
 879   :group 'gnus-threading
 880   :group 'gnus-score-default
 881   :type '(choice (const :tag "off" nil)
 882                  integer))
 883
 884 (defcustom gnus-summary-mode-hook nil
 885   "*A hook for Gnus summary mode.
 886 This hook is run before any variables are set in the summary buffer."
 887   :options '(turn-on-gnus-mailing-list-mode gnus-pick-mode)
 888   :group 'gnus-summary-various
 889   :type 'hook)
 890
 891 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
 892 (when (featurep 'xemacs)
 893   (add-hook 'gnus-summary-mode-hook 'gnus-xmas-summary-menu-add)
 894   (add-hook 'gnus-summary-mode-hook 'gnus-xmas-setup-summary-toolbar)
 895   (add-hook 'gnus-summary-mode-hook
 896             'gnus-xmas-switch-horizontal-scrollbar-off))
 897
 898 (defcustom gnus-summary-menu-hook nil
 899   "*Hook run after the creation of the summary mode menu."
 900   :group 'gnus-summary-visual
 901   :type 'hook)
 902
 903 (defcustom gnus-summary-exit-hook nil
 904   "*A hook called on exit from the summary buffer.
 905 It will be called with point in the group buffer."
 906   :group 'gnus-summary-exit
 907   :type 'hook)
 908
 909 (defcustom gnus-summary-prepare-hook nil
 910   "*A hook called after the summary buffer has been generated.
 911 If you want to modify the summary buffer, you can use this hook."
 912   :group 'gnus-summary-various
 913   :type 'hook)
 914
 915 (defcustom gnus-summary-prepared-hook nil
 916   "*A hook called as the last thing after the summary buffer has been generated."
 917   :group 'gnus-summary-various
 918   :type 'hook)
 919
 920 (defcustom gnus-summary-generate-hook nil
 921   "*A hook run just before generating the summary buffer.
 922 This hook is commonly used to customize threading variables and the
 923 like."
 924   :group 'gnus-summary-various
 925   :type 'hook)
 926
 927 (defcustom gnus-select-group-hook nil
 928   "*A hook called when a newsgroup is selected.
 929
 930 If you'd like to simplify subjects like the
 931 `gnus-summary-next-same-subject' command does, you can use the
 932 following hook:
 933
 934  (add-hook gnus-select-group-hook
 935            (lambda ()
 936              (mapcar (lambda (header)
 937                        (mail-header-set-subject
 938                         header
 939                         (gnus-simplify-subject
 940                          (mail-header-subject header) 're-only)))
 941                      gnus-newsgroup-headers)))"
 942   :group 'gnus-group-select
 943   :type 'hook)
 944
 945 (defcustom gnus-select-article-hook nil
 946   "*A hook called when an article is selected."
 947   :group 'gnus-summary-choose
 948   :options '(gnus-agent-fetch-selected-article)
 949   :type 'hook)
 950
 951 (defcustom gnus-visual-mark-article-hook
 952   (list 'gnus-highlight-selected-summary)
 953   "*Hook run after selecting an article in the summary buffer.
 954 It is meant to be used for highlighting the article in some way.  It
 955 is not run if `gnus-visual' is nil."
 956   :group 'gnus-summary-visual
 957   :type 'hook)
 958
 959 (defcustom gnus-parse-headers-hook nil
 960   "*A hook called before parsing the headers."
 961   :group 'gnus-various
 962   :type 'hook)
 963
 964 (defcustom gnus-exit-group-hook nil
 965   "*A hook called when exiting summary mode.
 966 This hook is not called from the non-updating exit commands like `Q'."
 967   :group 'gnus-various
 968   :type 'hook)
 969
 970 (defcustom gnus-summary-update-hook
 971   (list 'gnus-summary-highlight-line)
 972   "*A hook called when a summary line is changed.
 973 The hook will not be called if `gnus-visual' is nil.
 974
 975 The default function `gnus-summary-highlight-line' will
 976 highlight the line according to the `gnus-summary-highlight'
 977 variable."
 978   :group 'gnus-summary-visual
 979   :type 'hook)
 980
 981 (defcustom gnus-mark-article-hook '(gnus-summary-mark-read-and-unread-as-read)
 982   "*A hook called when an article is selected for the first time.
 983 The hook is intended to mark an article as read (or unread)
 984 automatically when it is selected."
 985   :group 'gnus-summary-choose
 986   :type 'hook)
 987
 988 (defcustom gnus-group-no-more-groups-hook nil
 989   "*A hook run when returning to group mode having no more (unread) groups."
 990   :group 'gnus-group-select
 991   :type 'hook)
 992
 993 (defcustom gnus-ps-print-hook nil
 994   "*A hook run before ps-printing something from Gnus."
 995   :group 'gnus-summary
 996   :type 'hook)
 997
 998 (defcustom gnus-summary-article-move-hook nil
 999   "*A hook called after an article is moved, copied, respooled, or crossposted."
1000   :version "22.1"
1001   :group 'gnus-summary
1002   :type 'hook)
1003
1004 (defcustom gnus-summary-article-delete-hook nil
1005   "*A hook called after an article is deleted."
1006   :version "22.1"
1007   :group 'gnus-summary
1008   :type 'hook)
1009
1010 (defcustom gnus-summary-article-expire-hook nil
1011   "*A hook called after an article is expired."
1012   :version "22.1"
1013   :group 'gnus-summary
1014   :type 'hook)
1015
1016 (defcustom gnus-summary-display-arrow
1017   (and (fboundp 'display-graphic-p)
1018        (display-graphic-p))
1019   "*If non-nil, display an arrow highlighting the current article."
1020   :version "22.1"
1021   :group 'gnus-summary
1022   :type 'boolean)
1023
1024 (defcustom gnus-summary-selected-face 'gnus-summary-selected
1025   "Face used for highlighting the current article in the summary buffer."
1026   :group 'gnus-summary-visual
1027   :type 'face)
1028
1029 (defvar gnus-tmp-downloaded nil)
1030
1031 (defcustom gnus-summary-highlight
1032   '(((eq mark gnus-canceled-mark)
1033      . gnus-summary-cancelled)
1034     ((and uncached (> score default-high))
1035      . gnus-summary-high-undownloaded)
1036     ((and uncached (< score default-low))
1037      . gnus-summary-low-undownloaded)
1038     (uncached
1039      . gnus-summary-normal-undownloaded)
1040     ((and (> score default-high)
1041           (or (eq mark gnus-dormant-mark)
1042               (eq mark gnus-ticked-mark)))
1043      . gnus-summary-high-ticked)
1044     ((and (< score default-low)
1045           (or (eq mark gnus-dormant-mark)
1046               (eq mark gnus-ticked-mark)))
1047      . gnus-summary-low-ticked)
1048     ((or (eq mark gnus-dormant-mark)
1049          (eq mark gnus-ticked-mark))
1050      . gnus-summary-normal-ticked)
1051     ((and (> score default-high) (eq mark gnus-ancient-mark))
1052      . gnus-summary-high-ancient)
1053     ((and (< score default-low) (eq mark gnus-ancient-mark))
1054      . gnus-summary-low-ancient)
1055     ((eq mark gnus-ancient-mark)
1056      . gnus-summary-normal-ancient)
1057     ((and (> score default-high) (eq mark gnus-unread-mark))
1058      . gnus-summary-high-unread)
1059     ((and (< score default-low) (eq mark gnus-unread-mark))
1060      . gnus-summary-low-unread)
1061     ((eq mark gnus-unread-mark)
1062      . gnus-summary-normal-unread)
1063     ((> score default-high)
1064      . gnus-summary-high-read)
1065     ((< score default-low)
1066      . gnus-summary-low-read)
1067     (t
1068      . gnus-summary-normal-read))
1069   "*Controls the highlighting of summary buffer lines.
1070
1071 A list of (FORM . FACE) pairs.  When deciding how a particular
1072 summary line should be displayed, each form is evaluated.  The content
1073 of the face field after the first true form is used.  You can change
1074 how those summary lines are displayed, by editing the face field.
1075
1076 You can use the following variables in the FORM field.
1077
1078 score:        The article's score.
1079 default:      The default article score.
1080 default-high: The default score for high scored articles.
1081 default-low:  The default score for low scored articles.
1082 below:        The score below which articles are automatically marked as read.
1083 mark:         The article's mark.
1084 uncached:     Non-nil if the article is uncached."
1085   :group 'gnus-summary-visual
1086   :type '(repeat (cons (sexp :tag "Form" nil)
1087                        face)))
1088 (put 'gnus-summary-highlight 'risky-local-variable t)
1089
1090 (defcustom gnus-alter-header-function nil
1091   "Function called to allow alteration of article header structures.
1092 The function is called with one parameter, the article header vector,
1093 which it may alter in any way."
1094   :type '(choice (const :tag "None" nil)
1095                  function)
1096   :group 'gnus-summary)
1097
1098 (defvar gnus-decode-encoded-word-function 'mail-decode-encoded-word-string
1099   "Function used to decode a string with encoded words.")
1100
1101 (defvar gnus-decode-encoded-address-function
1102   'mail-decode-encoded-address-string
1103   "Function used to decode addresses with encoded words.")
1104
1105 (defcustom gnus-extra-headers '(To Newsgroups)
1106   "*Extra headers to parse."
1107   :version "21.1"
1108   :group 'gnus-summary
1109   :type '(repeat symbol))
1110
1111 (defcustom gnus-ignored-from-addresses
1112   (and user-mail-address
1113        (not (string= user-mail-address ""))
1114        (regexp-quote user-mail-address))
1115   "*From headers that may be suppressed in favor of To headers.
1116 This can be a regexp or a list of regexps."
1117   :version "21.1"
1118   :group 'gnus-summary
1119   :type '(choice regexp
1120                  (repeat :tag "Regexp List" regexp)))
1121
1122 (defsubst gnus-ignored-from-addresses ()
1123   (gmm-regexp-concat gnus-ignored-from-addresses))
1124
1125 (defcustom gnus-summary-to-prefix "-> "
1126   "*String prefixed to the To field in the summary line when
1127 using `gnus-ignored-from-addresses'."
1128   :version "22.1"
1129   :group 'gnus-summary
1130   :type 'string)
1131
1132 (defcustom gnus-summary-newsgroup-prefix "=> "
1133   "*String prefixed to the Newsgroup field in the summary
1134 line when using `gnus-ignored-from-addresses'."
1135   :version "22.1"
1136   :group 'gnus-summary
1137   :type 'string)
1138
1139 (defcustom gnus-newsgroup-ignored-charsets '(unknown-8bit x-unknown)
1140   "List of charsets that should be ignored.
1141 When these charsets are used in the \"charset\" parameter, the
1142 default charset will be used instead."
1143   :version "21.1"
1144   :type '(repeat symbol)
1145   :group 'gnus-charset)
1146
1147 (defcustom gnus-newsgroup-maximum-articles nil
1148   "The maximum number of articles a newsgroup.
1149 If this is a number, old articles in a newsgroup exceeding this number
1150 are silently ignored.  If it is nil, no article is ignored.  Note that
1151 setting this variable to a number might prevent you from reading very
1152 old articles."
1153   :group 'gnus-group-select
1154   :version "22.2"
1155   :type '(choice (const :tag "No limit" nil)
1156                  integer))
1157
1158 (gnus-define-group-parameter
1159  ignored-charsets
1160  :type list
1161  :function-document
1162  "Return the ignored charsets of GROUP."
1163  :variable gnus-group-ignored-charsets-alist
1164  :variable-default
1165  '(("alt\\.chinese\\.text" iso-8859-1))
1166  :variable-document
1167  "Alist of regexps (to match group names) and charsets that should be ignored.
1168 When these charsets are used in the \"charset\" parameter, the
1169 default charset will be used instead."
1170  :variable-group gnus-charset
1171  :variable-type '(repeat (cons (regexp :tag "Group")
1172                                (repeat symbol)))
1173  :parameter-type '(choice :tag "Ignored charsets"
1174                           :value nil
1175                           (repeat (symbol)))
1176  :parameter-document       "\
1177 List of charsets that should be ignored.
1178
1179 When these charsets are used in the \"charset\" parameter, the
1180 default charset will be used instead.")
1181
1182 (defcustom gnus-group-highlight-words-alist nil
1183   "Alist of group regexps and highlight regexps.
1184 This variable uses the same syntax as `gnus-emphasis-alist'."
1185   :version "21.1"
1186   :type '(repeat (cons (regexp :tag "Group")
1187                        (repeat (list (regexp :tag "Highlight regexp")
1188                                      (number :tag "Group for entire word" 0)
1189                                      (number :tag "Group for displayed part" 0)
1190                                      (symbol :tag "Face"
1191                                              gnus-emphasis-highlight-words)))))
1192   :group 'gnus-summary-visual)
1193
1194 (defcustom gnus-summary-show-article-charset-alist
1195   nil
1196   "Alist of number and charset.
1197 The article will be shown with the charset corresponding to the
1198 numbered argument.
1199 For example: ((1 . cn-gb-2312) (2 . big5))."
1200   :version "21.1"
1201   :type '(repeat (cons (number :tag "Argument" 1)
1202                        (symbol :tag "Charset")))
1203   :group 'gnus-charset)
1204
1205 (defcustom gnus-preserve-marks t
1206   "Whether marks are preserved when moving, copying and respooling messages."
1207   :version "21.1"
1208   :type 'boolean
1209   :group 'gnus-summary-marks)
1210
1211 (defcustom gnus-alter-articles-to-read-function nil
1212   "Function to be called to alter the list of articles to be selected."
1213   :type '(choice (const nil) function)
1214   :group 'gnus-summary)
1215
1216 (defcustom gnus-orphan-score nil
1217   "*All orphans get this score added.  Set in the score file."
1218   :group 'gnus-score-default
1219   :type '(choice (const nil)
1220                  integer))
1221
1222 (defcustom gnus-summary-save-parts-default-mime "image/.*"
1223   "*A regexp to match MIME parts when saving multiple parts of a
1224 message with `gnus-summary-save-parts' (\\<gnus-summary-mode-map>\\[gnus-summary-save-parts]).
1225 This regexp will be used by default when prompting the user for which
1226 type of files to save."
1227   :group 'gnus-summary
1228   :type 'regexp)
1229
1230 (defcustom gnus-read-all-available-headers nil
1231   "Whether Gnus should parse all headers made available to it.
1232 This is mostly relevant for slow back ends where the user may
1233 wish to widen the summary buffer to include all headers
1234 that were fetched.  Say, for nnultimate groups."
1235   :version "22.1"
1236   :group 'gnus-summary
1237   :type '(choice boolean regexp))
1238
1239 (defcustom gnus-summary-muttprint-program "muttprint"
1240   "Command (and optional arguments) used to run Muttprint."
1241   :version "22.1"
1242   :group 'gnus-summary
1243   :type 'string)
1244
1245 (defcustom gnus-article-loose-mime t
1246   "If non-nil, don't require MIME-Version header.
1247 Some brain-damaged MUA/MTA, e.g. Lotus Domino 5.0.6 clients, does not
1248 supply the MIME-Version header or deliberately strip it from the mail.
1249 If non-nil (the default), Gnus will treat some articles as MIME
1250 even if the MIME-Version header is missing."
1251   :version "22.1"
1252   :type 'boolean
1253   :group 'gnus-article-mime)
1254
1255 (defcustom gnus-article-emulate-mime t
1256   "If non-nil, use MIME emulation for uuencode and the like.
1257 This means that Gnus will search message bodies for text that look
1258 like uuencoded bits, yEncoded bits, and so on, and present that using
1259 the normal Gnus MIME machinery."
1260   :version "22.1"
1261   :type 'boolean
1262   :group 'gnus-article-mime)
1263
1264 ;;; Internal variables
1265
1266 (defvar gnus-summary-display-cache nil)
1267 (defvar gnus-article-mime-handles nil)
1268 (defvar gnus-article-decoded-p nil)
1269 (defvar gnus-article-charset nil)
1270 (defvar gnus-article-ignored-charsets nil)
1271 (defvar gnus-scores-exclude-files nil)
1272 (defvar gnus-page-broken nil)
1273
1274 (defvar gnus-original-article nil)
1275 (defvar gnus-article-internal-prepare-hook nil)
1276 (defvar gnus-newsgroup-process-stack nil)
1277
1278 (defvar gnus-thread-indent-array nil)
1279 (defvar gnus-thread-indent-array-level gnus-thread-indent-level)
1280 (defvar gnus-sort-gathered-threads-function 'gnus-thread-sort-by-number
1281   "Function called to sort the articles within a thread after it has been gathered together.")
1282
1283 (defvar gnus-summary-save-parts-type-history nil)
1284 (defvar gnus-summary-save-parts-last-directory mm-default-directory)
1285
1286 ;; Avoid highlighting in kill files.
1287 (defvar gnus-summary-inhibit-highlight nil)
1288 (defvar gnus-newsgroup-selected-overlay nil)
1289 (defvar gnus-inhibit-limiting nil)
1290 (defvar gnus-newsgroup-adaptive-score-file nil)
1291 (defvar gnus-current-score-file nil)
1292 (defvar gnus-current-move-group nil)
1293 (defvar gnus-current-copy-group nil)
1294 (defvar gnus-current-crosspost-group nil)
1295 (defvar gnus-newsgroup-display nil)
1296
1297 (defvar gnus-newsgroup-dependencies nil)
1298 (defvar gnus-newsgroup-adaptive nil)
1299 (defvar gnus-summary-display-article-function nil)
1300 (defvar gnus-summary-highlight-line-function nil
1301   "Function called after highlighting a summary line.")
1302
1303 (defvar gnus-summary-line-format-alist
1304   `((?N ,(macroexpand '(mail-header-number gnus-tmp-header)) ?d)
1305     (?S ,(macroexpand '(mail-header-subject gnus-tmp-header)) ?s)
1306     (?s gnus-tmp-subject-or-nil ?s)
1307     (?n gnus-tmp-name ?s)
1308     (?A (car (cdr (funcall gnus-extract-address-components gnus-tmp-from)))
1309         ?s)
1310     (?a (or (car (funcall gnus-extract-address-components gnus-tmp-from))
1311             gnus-tmp-from) ?s)
1312     (?F gnus-tmp-from ?s)
1313     (?x ,(macroexpand '(mail-header-xref gnus-tmp-header)) ?s)
1314     (?D ,(macroexpand '(mail-header-date gnus-tmp-header)) ?s)
1315     (?d (gnus-dd-mmm (mail-header-date gnus-tmp-header)) ?s)
1316     (?o (gnus-date-iso8601 (mail-header-date gnus-tmp-header)) ?s)
1317     (?M ,(macroexpand '(mail-header-id gnus-tmp-header)) ?s)
1318     (?r ,(macroexpand '(mail-header-references gnus-tmp-header)) ?s)
1319     (?c (or (mail-header-chars gnus-tmp-header) 0) ?d)
1320     (?k (gnus-summary-line-message-size gnus-tmp-header) ?s)
1321     (?L gnus-tmp-lines ?s)
1322     (?O gnus-tmp-downloaded ?c)
1323     (?I gnus-tmp-indentation ?s)
1324     (?T (if (= gnus-tmp-level 0) "" (make-string (frame-width) ? )) ?s)
1325     (?R gnus-tmp-replied ?c)
1326     (?\[ gnus-tmp-opening-bracket ?c)
1327     (?\] gnus-tmp-closing-bracket ?c)
1328     (?\> (make-string gnus-tmp-level ? ) ?s)
1329     (?\< (make-string (max 0 (- 20 gnus-tmp-level)) ? ) ?s)
1330     (?i gnus-tmp-score ?d)
1331     (?z gnus-tmp-score-char ?c)
1332     (?V (gnus-thread-total-score (and (boundp 'thread) (car thread))) ?d)
1333     (?U gnus-tmp-unread ?c)
1334     (?f (gnus-summary-from-or-to-or-newsgroups gnus-tmp-header gnus-tmp-from)
1335         ?s)
1336     (?t (gnus-summary-number-of-articles-in-thread
1337          (and (boundp 'thread) (car thread)) gnus-tmp-level)
1338         ?d)
1339     (?e (gnus-summary-number-of-articles-in-thread
1340          (and (boundp 'thread) (car thread)) gnus-tmp-level t)
1341         ?c)
1342     (?u gnus-tmp-user-defined ?s)
1343     (?P (gnus-pick-line-number) ?d)
1344     (?B gnus-tmp-thread-tree-header-string ?s)
1345     (user-date (gnus-user-date
1346                 ,(macroexpand '(mail-header-date gnus-tmp-header))) ?s))
1347   "An alist of format specifications that can appear in summary lines.
1348 These are paired with what variables they correspond with, along with
1349 the type of the variable (string, integer, character, etc).")
1350
1351 (defvar gnus-summary-dummy-line-format-alist
1352   `((?S gnus-tmp-subject ?s)
1353     (?N gnus-tmp-number ?d)
1354     (?u gnus-tmp-user-defined ?s)))
1355
1356 (defvar gnus-summary-mode-line-format-alist
1357   `((?G gnus-tmp-group-name ?s)
1358     (?g (gnus-short-group-name gnus-tmp-group-name) ?s)
1359     (?p (gnus-group-real-name gnus-tmp-group-name) ?s)
1360     (?A gnus-tmp-article-number ?d)
1361     (?Z gnus-tmp-unread-and-unselected ?s)
1362     (?V gnus-version ?s)
1363     (?U gnus-tmp-unread-and-unticked ?d)
1364     (?S gnus-tmp-subject ?s)
1365     (?e gnus-tmp-unselected ?d)
1366     (?u gnus-tmp-user-defined ?s)
1367     (?d (length gnus-newsgroup-dormant) ?d)
1368     (?t (length gnus-newsgroup-marked) ?d)
1369     (?h (length gnus-newsgroup-spam-marked) ?d)
1370     (?r (length gnus-newsgroup-reads) ?d)
1371     (?z (gnus-summary-article-score gnus-tmp-article-number) ?d)
1372     (?E gnus-newsgroup-expunged-tally ?d)
1373     (?s (gnus-current-score-file-nondirectory) ?s)))
1374
1375 ;; This is here rather than in gnus-art for compilation reasons.
1376 (defvar gnus-article-mode-line-format-alist
1377   (nconc '((?w (gnus-article-wash-status) ?s)
1378            (?m (gnus-article-mime-part-status) ?s))
1379          gnus-summary-mode-line-format-alist))
1380
1381 (defvar gnus-last-search-regexp nil
1382   "Default regexp for article search command.")
1383
1384 (defvar gnus-last-shell-command nil
1385   "Default shell command on article.")
1386
1387 (defvar gnus-newsgroup-agentized nil
1388   "Locally bound in each summary buffer to indicate whether the server has been agentized.")
1389 (defvar gnus-newsgroup-begin nil)
1390 (defvar gnus-newsgroup-end nil)
1391 (defvar gnus-newsgroup-last-rmail nil)
1392 (defvar gnus-newsgroup-last-mail nil)
1393 (defvar gnus-newsgroup-last-folder nil)
1394 (defvar gnus-newsgroup-last-file nil)
1395 (defvar gnus-newsgroup-last-directory nil)
1396 (defvar gnus-newsgroup-auto-expire nil)
1397 (defvar gnus-newsgroup-active nil)
1398
1399 (defvar gnus-newsgroup-data nil)
1400 (defvar gnus-newsgroup-data-reverse nil)
1401 (defvar gnus-newsgroup-limit nil)
1402 (defvar gnus-newsgroup-limits nil)
1403 (defvar gnus-summary-use-undownloaded-faces nil)
1404
1405 (defvar gnus-newsgroup-unreads nil
1406   "Sorted list of unread articles in the current newsgroup.")
1407
1408 (defvar gnus-newsgroup-unselected nil
1409   "Sorted list of unselected unread articles in the current newsgroup.")
1410
1411 (defvar gnus-newsgroup-reads nil
1412   "Alist of read articles and article marks in the current newsgroup.")
1413
1414 (defvar gnus-newsgroup-expunged-tally nil)
1415
1416 (defvar gnus-newsgroup-marked nil
1417   "Sorted list of ticked articles in the current newsgroup (a subset of unread art).")
1418
1419 (defvar gnus-newsgroup-spam-marked nil
1420   "List of ranges of articles that have been marked as spam.")
1421
1422 (defvar gnus-newsgroup-killed nil
1423   "List of ranges of articles that have been through the scoring process.")
1424
1425 (defvar gnus-newsgroup-cached nil
1426   "Sorted list of articles that come from the article cache.")
1427
1428 (defvar gnus-newsgroup-saved nil
1429   "List of articles that have been saved.")
1430
1431 (defvar gnus-newsgroup-kill-headers nil)
1432
1433 (defvar gnus-newsgroup-replied nil
1434   "List of articles that have been replied to in the current newsgroup.")
1435
1436 (defvar gnus-newsgroup-forwarded nil
1437   "List of articles that have been forwarded in the current newsgroup.")
1438
1439 (defvar gnus-newsgroup-recent nil
1440   "List of articles that have are recent in the current newsgroup.")
1441
1442 (defvar gnus-newsgroup-expirable nil
1443   "Sorted list of articles in the current newsgroup that can be expired.")
1444
1445 (defvar gnus-newsgroup-processable nil
1446   "List of articles in the current newsgroup that can be processed.")
1447
1448 (defvar gnus-newsgroup-downloadable nil
1449   "Sorted list of articles in the current newsgroup that can be processed.")
1450
1451 (defvar gnus-newsgroup-unfetched nil
1452   "Sorted list of articles in the current newsgroup whose headers have
1453 not been fetched into the agent.
1454
1455 This list will always be a subset of gnus-newsgroup-undownloaded.")
1456
1457 (defvar gnus-newsgroup-undownloaded nil
1458   "List of articles in the current newsgroup that haven't been downloaded.")
1459
1460 (defvar gnus-newsgroup-unsendable nil
1461   "List of articles in the current newsgroup that won't be sent.")
1462
1463 (defvar gnus-newsgroup-bookmarks nil
1464   "List of articles in the current newsgroup that have bookmarks.")
1465
1466 (defvar gnus-newsgroup-dormant nil
1467   "Sorted list of dormant articles in the current newsgroup.")
1468
1469 (defvar gnus-newsgroup-unseen nil
1470   "List of unseen articles in the current newsgroup.")
1471
1472 (defvar gnus-newsgroup-seen nil
1473   "Range of seen articles in the current newsgroup.")
1474
1475 (defvar gnus-newsgroup-articles nil
1476   "List of articles in the current newsgroup.")
1477
1478 (defvar gnus-newsgroup-scored nil
1479   "List of scored articles in the current newsgroup.")
1480
1481 (defvar gnus-newsgroup-headers nil
1482   "List of article headers in the current newsgroup.")
1483
1484 (defvar gnus-newsgroup-threads nil)
1485
1486 (defvar gnus-newsgroup-prepared nil
1487   "Whether the current group has been prepared properly.")
1488
1489 (defvar gnus-newsgroup-ancient nil
1490   "List of `gnus-fetch-old-headers' articles in the current newsgroup.")
1491
1492 (defvar gnus-newsgroup-sparse nil)
1493
1494 (defvar gnus-current-article nil)
1495 (defvar gnus-article-current nil)
1496 (defvar gnus-current-headers nil)
1497 (defvar gnus-have-all-headers nil)
1498 (defvar gnus-last-article nil)
1499 (defvar gnus-newsgroup-history nil)
1500 (defvar gnus-newsgroup-charset nil)
1501 (defvar gnus-newsgroup-ephemeral-charset nil)
1502 (defvar gnus-newsgroup-ephemeral-ignored-charsets nil)
1503
1504 (defvar gnus-article-before-search nil)
1505
1506 (defvar gnus-summary-local-variables
1507   '(gnus-newsgroup-name
1508     gnus-newsgroup-begin gnus-newsgroup-end
1509     gnus-newsgroup-last-rmail gnus-newsgroup-last-mail
1510     gnus-newsgroup-last-folder gnus-newsgroup-last-file
1511     gnus-newsgroup-last-directory
1512     gnus-newsgroup-auto-expire gnus-newsgroup-unreads
1513     gnus-newsgroup-unselected gnus-newsgroup-marked
1514     gnus-newsgroup-spam-marked
1515     gnus-newsgroup-reads gnus-newsgroup-saved
1516     gnus-newsgroup-replied gnus-newsgroup-forwarded
1517     gnus-newsgroup-recent
1518     gnus-newsgroup-expirable
1519     gnus-newsgroup-processable gnus-newsgroup-killed
1520     gnus-newsgroup-downloadable gnus-newsgroup-undownloaded
1521     gnus-newsgroup-unfetched
1522     gnus-newsgroup-unsendable gnus-newsgroup-unseen
1523     gnus-newsgroup-seen gnus-newsgroup-articles
1524     gnus-newsgroup-bookmarks gnus-newsgroup-dormant
1525     gnus-newsgroup-headers gnus-newsgroup-threads
1526     gnus-newsgroup-prepared gnus-summary-highlight-line-function
1527     gnus-current-article gnus-current-headers gnus-have-all-headers
1528     gnus-last-article gnus-article-internal-prepare-hook
1529     gnus-newsgroup-dependencies gnus-newsgroup-selected-overlay
1530     gnus-newsgroup-scored gnus-newsgroup-kill-headers
1531     gnus-thread-expunge-below
1532     gnus-score-alist gnus-current-score-file
1533     (gnus-summary-expunge-below . global)
1534     (gnus-summary-mark-below . global)
1535     (gnus-orphan-score . global)
1536     gnus-newsgroup-active gnus-scores-exclude-files
1537     gnus-newsgroup-history gnus-newsgroup-ancient
1538     gnus-newsgroup-sparse gnus-newsgroup-process-stack
1539     (gnus-newsgroup-adaptive . gnus-use-adaptive-scoring)
1540     gnus-newsgroup-adaptive-score-file (gnus-reffed-article-number . -1)
1541     (gnus-newsgroup-expunged-tally . 0)
1542     gnus-cache-removable-articles gnus-newsgroup-cached
1543     gnus-newsgroup-data gnus-newsgroup-data-reverse
1544     gnus-newsgroup-limit gnus-newsgroup-limits
1545     gnus-newsgroup-charset gnus-newsgroup-display
1546     gnus-summary-use-undownloaded-faces)
1547   "Variables that are buffer-local to the summary buffers.")
1548
1549 (defvar gnus-newsgroup-variables nil
1550   "A list of variables that have separate values in different newsgroups.
1551 A list of newsgroup (summary buffer) local variables, or cons of
1552 variables and their default expressions to be evalled (when the default
1553 values are not nil), that should be made global while the summary buffer
1554 is active.
1555
1556 Note: The default expressions will be evaluated (using function `eval')
1557 before assignment to the local variable rather than just assigned to it.
1558 If the default expression is the symbol `global', that symbol will not
1559 be evaluated but the global value of the local variable will be used
1560 instead.
1561
1562 These variables can be used to set variables in the group parameters
1563 while still allowing them to affect operations done in other buffers.
1564 For example:
1565
1566 \(setq gnus-newsgroup-variables
1567      '(message-use-followup-to
1568        (gnus-visible-headers .
1569          \"^From:\\\\|^Newsgroups:\\\\|^Subject:\\\\|^Date:\\\\|^To:\")))
1570 ")
1571
1572 (eval-when-compile
1573   ;; Bind features so that require will believe that gnus-sum has
1574   ;; already been loaded (avoids infinite recursion)
1575   (let ((features (cons 'gnus-sum features)))
1576     (require 'gnus-art)))
1577
1578 ;; MIME stuff.
1579
1580 (defvar gnus-decode-encoded-word-methods
1581   '(mail-decode-encoded-word-string)
1582   "List of methods used to decode encoded words.
1583
1584 This variable is a list of FUNCTION or (REGEXP . FUNCTION).  If item
1585 is FUNCTION, FUNCTION will be apply to all newsgroups.  If item is a
1586 \(REGEXP . FUNCTION), FUNCTION will be only apply to thes newsgroups
1587 whose names match REGEXP.
1588
1589 For example:
1590 \((\"chinese\" . gnus-decode-encoded-word-string-by-guess)
1591  mail-decode-encoded-word-string
1592  (\"chinese\" . rfc1843-decode-string))")
1593
1594 (defvar gnus-decode-encoded-word-methods-cache nil)
1595
1596 (defun gnus-multi-decode-encoded-word-string (string)
1597   "Apply the functions from `gnus-encoded-word-methods' that match."
1598   (unless (and gnus-decode-encoded-word-methods-cache
1599                (eq gnus-newsgroup-name
1600                    (car gnus-decode-encoded-word-methods-cache)))
1601     (setq gnus-decode-encoded-word-methods-cache (list gnus-newsgroup-name))
1602     (dolist (method gnus-decode-encoded-word-methods)
1603       (if (symbolp method)
1604           (nconc gnus-decode-encoded-word-methods-cache (list method))
1605         (if (and gnus-newsgroup-name
1606                  (string-match (car method) gnus-newsgroup-name))
1607             (nconc gnus-decode-encoded-word-methods-cache
1608                    (list (cdr method)))))))
1609   (dolist (method (cdr gnus-decode-encoded-word-methods-cache) string)
1610     (setq string (funcall method string))))
1611
1612 ;; Subject simplification.
1613
1614 (defun gnus-simplify-whitespace (str)
1615   "Remove excessive whitespace from STR."
1616   ;; Multiple spaces.
1617   (while (string-match "[ \t][ \t]+" str)
1618     (setq str (concat (substring str 0 (match-beginning 0))
1619                         " "
1620                         (substring str (match-end 0)))))
1621   ;; Leading spaces.
1622   (when (string-match "^[ \t]+" str)
1623     (setq str (substring str (match-end 0))))
1624   ;; Trailing spaces.
1625   (when (string-match "[ \t]+$" str)
1626     (setq str (substring str 0 (match-beginning 0))))
1627   str)
1628
1629 (defun gnus-simplify-all-whitespace (str)
1630   "Remove all whitespace from STR."
1631   (while (string-match "[ \t\n]+" str)
1632     (setq str (replace-match "" nil nil str)))
1633   str)
1634
1635 (defsubst gnus-simplify-subject-re (subject)
1636   "Remove \"Re:\" from subject lines."
1637   (if (string-match message-subject-re-regexp subject)
1638       (substring subject (match-end 0))
1639     subject))
1640
1641 (defun gnus-simplify-subject (subject &optional re-only)
1642   "Remove `Re:' and words in parentheses.
1643 If RE-ONLY is non-nil, strip leading `Re:'s only."
1644   (let ((case-fold-search t))           ;Ignore case.
1645     ;; Remove `Re:', `Re^N:', `Re(n)', and `Re[n]:'.
1646     (when (string-match "\\`\\(re\\([[(^][0-9]+[])]?\\)?:[ \t]*\\)+" subject)
1647       (setq subject (substring subject (match-end 0))))
1648     ;; Remove uninteresting prefixes.
1649     (when (and (not re-only)
1650                gnus-simplify-ignored-prefixes
1651                (string-match gnus-simplify-ignored-prefixes subject))
1652       (setq subject (substring subject (match-end 0))))
1653     ;; Remove words in parentheses from end.
1654     (unless re-only
1655       (while (string-match "[ \t\n]*([^()]*)[ \t\n]*\\'" subject)
1656         (setq subject (substring subject 0 (match-beginning 0)))))
1657     ;; Return subject string.
1658     subject))
1659
1660 ;; Remove any leading "re:"s, any trailing paren phrases, and simplify
1661 ;; all whitespace.
1662 (defsubst gnus-simplify-buffer-fuzzy-step (regexp &optional newtext)
1663   (goto-char (point-min))
1664   (while (re-search-forward regexp nil t)
1665     (replace-match (or newtext ""))))
1666
1667 (defun gnus-simplify-buffer-fuzzy ()
1668   "Simplify string in the buffer fuzzily.
1669 The string in the accessible portion of the current buffer is simplified.
1670 It is assumed to be a single-line subject.
1671 Whitespace is generally cleaned up, and miscellaneous leading/trailing
1672 matter is removed.  Additional things can be deleted by setting
1673 `gnus-simplify-subject-fuzzy-regexp'."
1674   (let ((case-fold-search t)
1675         (modified-tick))
1676     (gnus-simplify-buffer-fuzzy-step "\t" " ")
1677
1678     (while (not (eq modified-tick (buffer-modified-tick)))
1679       (setq modified-tick (buffer-modified-tick))
1680       (cond
1681        ((listp gnus-simplify-subject-fuzzy-regexp)
1682         (mapc 'gnus-simplify-buffer-fuzzy-step
1683               gnus-simplify-subject-fuzzy-regexp))
1684        (gnus-simplify-subject-fuzzy-regexp
1685         (gnus-simplify-buffer-fuzzy-step gnus-simplify-subject-fuzzy-regexp)))
1686       (gnus-simplify-buffer-fuzzy-step "^ *\\[[-+?*!][-+?*!]\\] *")
1687       (gnus-simplify-buffer-fuzzy-step
1688        "^ *\\(re\\|fw\\|fwd\\)[[{(^0-9]*[])}]?[:;] *")
1689       (gnus-simplify-buffer-fuzzy-step "^[[].*:\\( .*\\)[]]$" "\\1"))
1690
1691     (gnus-simplify-buffer-fuzzy-step " *[[{(][^()\n]*[]})] *$")
1692     (gnus-simplify-buffer-fuzzy-step "  +" " ")
1693     (gnus-simplify-buffer-fuzzy-step " $")
1694     (gnus-simplify-buffer-fuzzy-step "^ +")))
1695
1696 (defun gnus-simplify-subject-fuzzy (subject)
1697   "Simplify a subject string fuzzily.
1698 See `gnus-simplify-buffer-fuzzy' for details."
1699   (save-excursion
1700     (gnus-set-work-buffer)
1701     (let ((case-fold-search t))
1702       ;; Remove uninteresting prefixes.
1703       (when (and gnus-simplify-ignored-prefixes
1704                  (string-match gnus-simplify-ignored-prefixes subject))
1705         (setq subject (substring subject (match-end 0))))
1706       (insert subject)
1707       (inline (gnus-simplify-buffer-fuzzy))
1708       (buffer-string))))
1709
1710 (defsubst gnus-simplify-subject-fully (subject)
1711   "Simplify a subject string according to `gnus-summary-gather-subject-limit'."
1712   (cond
1713    (gnus-simplify-subject-functions
1714     (gnus-map-function gnus-simplify-subject-functions subject))
1715    ((null gnus-summary-gather-subject-limit)
1716     (gnus-simplify-subject-re subject))
1717    ((eq gnus-summary-gather-subject-limit 'fuzzy)
1718     (gnus-simplify-subject-fuzzy subject))
1719    ((numberp gnus-summary-gather-subject-limit)
1720     (truncate-string-to-width (gnus-simplify-subject-re subject)
1721                               gnus-summary-gather-subject-limit))
1722    (t
1723     subject)))
1724
1725 (defsubst gnus-subject-equal (s1 s2 &optional simple-first)
1726   "Check whether two subjects are equal.
1727 If optional argument SIMPLE-FIRST is t, first argument is already
1728 simplified."
1729   (cond
1730    ((null simple-first)
1731     (equal (gnus-simplify-subject-fully s1)
1732            (gnus-simplify-subject-fully s2)))
1733    (t
1734     (equal s1
1735            (gnus-simplify-subject-fully s2)))))
1736
1737 (defun gnus-summary-bubble-group ()
1738   "Increase the score of the current group.
1739 This is a handy function to add to `gnus-summary-exit-hook' to
1740 increase the score of each group you read."
1741   (gnus-group-add-score gnus-newsgroup-name))
1742
1743 \f
1744 ;;;
1745 ;;; Gnus summary mode
1746 ;;;
1747
1748 (put 'gnus-summary-mode 'mode-class 'special)
1749
1750 (defvar gnus-article-commands-menu)
1751
1752 ;; Non-orthogonal keys
1753
1754 (gnus-define-keys gnus-summary-mode-map
1755   " " gnus-summary-next-page
1756   "\177" gnus-summary-prev-page
1757   [delete] gnus-summary-prev-page
1758   [backspace] gnus-summary-prev-page
1759   "\r" gnus-summary-scroll-up
1760   "\M-\r" gnus-summary-scroll-down
1761   "n" gnus-summary-next-unread-article
1762   "p" gnus-summary-prev-unread-article
1763   "N" gnus-summary-next-article
1764   "P" gnus-summary-prev-article
1765   "\M-\C-n" gnus-summary-next-same-subject
1766   "\M-\C-p" gnus-summary-prev-same-subject
1767   "\M-n" gnus-summary-next-unread-subject
1768   "\M-p" gnus-summary-prev-unread-subject
1769   "." gnus-summary-first-unread-article
1770   "," gnus-summary-best-unread-article
1771   "\M-s" gnus-summary-search-article-forward
1772   "\M-r" gnus-summary-search-article-backward
1773   "\M-S" gnus-summary-repeat-search-article-forward
1774   "\M-R" gnus-summary-repeat-search-article-backward
1775   "<" gnus-summary-beginning-of-article
1776   ">" gnus-summary-end-of-article
1777   "j" gnus-summary-goto-article
1778   "^" gnus-summary-refer-parent-article
1779   "\M-^" gnus-summary-refer-article
1780   "u" gnus-summary-tick-article-forward
1781   "!" gnus-summary-tick-article-forward
1782   "U" gnus-summary-tick-article-backward
1783   "d" gnus-summary-mark-as-read-forward
1784   "D" gnus-summary-mark-as-read-backward
1785   "E" gnus-summary-mark-as-expirable
1786   "\M-u" gnus-summary-clear-mark-forward
1787   "\M-U" gnus-summary-clear-mark-backward
1788   "k" gnus-summary-kill-same-subject-and-select
1789   "\C-k" gnus-summary-kill-same-subject
1790   "\M-\C-k" gnus-summary-kill-thread
1791   "\M-\C-l" gnus-summary-lower-thread
1792   "e" gnus-summary-edit-article
1793   "#" gnus-summary-mark-as-processable
1794   "\M-#" gnus-summary-unmark-as-processable
1795   "\M-\C-t" gnus-summary-toggle-threads
1796   "\M-\C-s" gnus-summary-show-thread
1797   "\M-\C-h" gnus-summary-hide-thread
1798   "\M-\C-f" gnus-summary-next-thread
1799   "\M-\C-b" gnus-summary-prev-thread
1800   [(meta down)] gnus-summary-next-thread
1801   [(meta up)] gnus-summary-prev-thread
1802   "\M-\C-u" gnus-summary-up-thread
1803   "\M-\C-d" gnus-summary-down-thread
1804   "&" gnus-summary-execute-command
1805   "c" gnus-summary-catchup-and-exit
1806   "\C-w" gnus-summary-mark-region-as-read
1807   "\C-t" gnus-summary-toggle-truncation
1808   "?" gnus-summary-mark-as-dormant
1809   "\C-c\M-\C-s" gnus-summary-limit-include-expunged
1810   "\C-c\C-s\C-n" gnus-summary-sort-by-number
1811   "\C-c\C-s\C-l" gnus-summary-sort-by-lines
1812   "\C-c\C-s\C-c" gnus-summary-sort-by-chars
1813   "\C-c\C-s\C-a" gnus-summary-sort-by-author
1814   "\C-c\C-s\C-t" gnus-summary-sort-by-recipient
1815   "\C-c\C-s\C-s" gnus-summary-sort-by-subject
1816   "\C-c\C-s\C-d" gnus-summary-sort-by-date
1817   "\C-c\C-s\C-i" gnus-summary-sort-by-score
1818   "\C-c\C-s\C-o" gnus-summary-sort-by-original
1819   "\C-c\C-s\C-r" gnus-summary-sort-by-random
1820   "=" gnus-summary-expand-window
1821   "\C-x\C-s" gnus-summary-reselect-current-group
1822   "\M-g" gnus-summary-rescan-group
1823   "w" gnus-summary-stop-page-breaking
1824   "\C-c\C-r" gnus-summary-caesar-message
1825   "f" gnus-summary-followup
1826   "F" gnus-summary-followup-with-original
1827   "C" gnus-summary-cancel-article
1828   "r" gnus-summary-reply
1829   "R" gnus-summary-reply-with-original
1830   "\C-c\C-f" gnus-summary-mail-forward
1831   "o" gnus-summary-save-article
1832   "\C-o" gnus-summary-save-article-mail
1833   "|" gnus-summary-pipe-output
1834   "\M-k" gnus-summary-edit-local-kill
1835   "\M-K" gnus-summary-edit-global-kill
1836   ;; "V" gnus-version
1837   "\C-c\C-d" gnus-summary-describe-group
1838   "q" gnus-summary-exit
1839   "Q" gnus-summary-exit-no-update
1840   "\C-c\C-i" gnus-info-find-node
1841   gnus-mouse-2 gnus-mouse-pick-article
1842   [follow-link] mouse-face
1843   "m" gnus-summary-mail-other-window
1844   "a" gnus-summary-post-news
1845   "i" gnus-summary-news-other-window
1846   "x" gnus-summary-limit-to-unread
1847   "s" gnus-summary-isearch-article
1848   "t" gnus-summary-toggle-header
1849   "g" gnus-summary-show-article
1850   "l" gnus-summary-goto-last-article
1851   "\C-c\C-v\C-v" gnus-uu-decode-uu-view
1852   "\C-d" gnus-summary-enter-digest-group
1853   "\M-\C-d" gnus-summary-read-document
1854   "\M-\C-e" gnus-summary-edit-parameters
1855   "\M-\C-a" gnus-summary-customize-parameters
1856   "\C-c\C-b" gnus-bug
1857   "*" gnus-cache-enter-article
1858   "\M-*" gnus-cache-remove-article
1859   "\M-&" gnus-summary-universal-argument
1860   "\C-l" gnus-recenter
1861   "I" gnus-summary-increase-score
1862   "L" gnus-summary-lower-score
1863   "\M-i" gnus-symbolic-argument
1864   "h" gnus-summary-select-article-buffer
1865
1866   "b" gnus-article-view-part
1867   "\M-t" gnus-summary-toggle-display-buttonized
1868
1869   "V" gnus-summary-score-map
1870   "X" gnus-uu-extract-map
1871   "S" gnus-summary-send-map)
1872
1873 ;; Sort of orthogonal keymap
1874 (gnus-define-keys (gnus-summary-mark-map "M" gnus-summary-mode-map)
1875   "t" gnus-summary-tick-article-forward
1876   "!" gnus-summary-tick-article-forward
1877   "d" gnus-summary-mark-as-read-forward
1878   "r" gnus-summary-mark-as-read-forward
1879   "c" gnus-summary-clear-mark-forward
1880   " " gnus-summary-clear-mark-forward
1881   "e" gnus-summary-mark-as-expirable
1882   "x" gnus-summary-mark-as-expirable
1883   "?" gnus-summary-mark-as-dormant
1884   "b" gnus-summary-set-bookmark
1885   "B" gnus-summary-remove-bookmark
1886   "#" gnus-summary-mark-as-processable
1887   "\M-#" gnus-summary-unmark-as-processable
1888   "S" gnus-summary-limit-include-expunged
1889   "C" gnus-summary-catchup
1890   "H" gnus-summary-catchup-to-here
1891   "h" gnus-summary-catchup-from-here
1892   "\C-c" gnus-summary-catchup-all
1893   "k" gnus-summary-kill-same-subject-and-select
1894   "K" gnus-summary-kill-same-subject
1895   "P" gnus-uu-mark-map)
1896
1897 (gnus-define-keys (gnus-summary-mscore-map "V" gnus-summary-mark-map)
1898   "c" gnus-summary-clear-above
1899   "u" gnus-summary-tick-above
1900   "m" gnus-summary-mark-above
1901   "k" gnus-summary-kill-below)
1902
1903 (gnus-define-keys (gnus-summary-limit-map "/" gnus-summary-mode-map)
1904   "/" gnus-summary-limit-to-subject
1905   "n" gnus-summary-limit-to-articles
1906   "b" gnus-summary-limit-to-bodies
1907   "h" gnus-summary-limit-to-headers
1908   "w" gnus-summary-pop-limit
1909   "s" gnus-summary-limit-to-subject
1910   "a" gnus-summary-limit-to-author
1911   "u" gnus-summary-limit-to-unread
1912   "m" gnus-summary-limit-to-marks
1913   "M" gnus-summary-limit-exclude-marks
1914   "v" gnus-summary-limit-to-score
1915   "*" gnus-summary-limit-include-cached
1916   "D" gnus-summary-limit-include-dormant
1917   "T" gnus-summary-limit-include-thread
1918   "d" gnus-summary-limit-exclude-dormant
1919   "t" gnus-summary-limit-to-age
1920   "." gnus-summary-limit-to-unseen
1921   "x" gnus-summary-limit-to-extra
1922   "p" gnus-summary-limit-to-display-predicate
1923   "E" gnus-summary-limit-include-expunged
1924   "c" gnus-summary-limit-exclude-childless-dormant
1925   "C" gnus-summary-limit-mark-excluded-as-read
1926   "o" gnus-summary-insert-old-articles
1927   "N" gnus-summary-insert-new-articles
1928   "S" gnus-summary-limit-to-singletons
1929   "r" gnus-summary-limit-to-replied
1930   "R" gnus-summary-limit-to-recipient
1931   "A" gnus-summary-limit-to-address)
1932
1933 (gnus-define-keys (gnus-summary-goto-map "G" gnus-summary-mode-map)
1934   "n" gnus-summary-next-unread-article
1935   "p" gnus-summary-prev-unread-article
1936   "N" gnus-summary-next-article
1937   "P" gnus-summary-prev-article
1938   "\C-n" gnus-summary-next-same-subject
1939   "\C-p" gnus-summary-prev-same-subject
1940   "\M-n" gnus-summary-next-unread-subject
1941   "\M-p" gnus-summary-prev-unread-subject
1942   "f" gnus-summary-first-unread-article
1943   "b" gnus-summary-best-unread-article
1944   "j" gnus-summary-goto-article
1945   "g" gnus-summary-goto-subject
1946   "l" gnus-summary-goto-last-article
1947   "o" gnus-summary-pop-article)
1948
1949 (gnus-define-keys (gnus-summary-thread-map "T" gnus-summary-mode-map)
1950   "k" gnus-summary-kill-thread
1951   "E" gnus-summary-expire-thread
1952   "l" gnus-summary-lower-thread
1953   "i" gnus-summary-raise-thread
1954   "T" gnus-summary-toggle-threads
1955   "t" gnus-summary-rethread-current
1956   "^" gnus-summary-reparent-thread
1957   "\M-^" gnus-summary-reparent-children
1958   "s" gnus-summary-show-thread
1959   "S" gnus-summary-show-all-threads
1960   "h" gnus-summary-hide-thread
1961   "H" gnus-summary-hide-all-threads
1962   "n" gnus-summary-next-thread
1963   "p" gnus-summary-prev-thread
1964   "u" gnus-summary-up-thread
1965   "o" gnus-summary-top-thread
1966   "d" gnus-summary-down-thread
1967   "#" gnus-uu-mark-thread
1968   "\M-#" gnus-uu-unmark-thread)
1969
1970 (gnus-define-keys (gnus-summary-buffer-map "Y" gnus-summary-mode-map)
1971   "g" gnus-summary-prepare
1972   "c" gnus-summary-insert-cached-articles
1973   "d" gnus-summary-insert-dormant-articles
1974   "t" gnus-summary-insert-ticked-articles)
1975
1976 (gnus-define-keys (gnus-summary-exit-map "Z" gnus-summary-mode-map)
1977   "c" gnus-summary-catchup-and-exit
1978   "C" gnus-summary-catchup-all-and-exit
1979   "E" gnus-summary-exit-no-update
1980   "Q" gnus-summary-exit
1981   "Z" gnus-summary-exit
1982   "n" gnus-summary-catchup-and-goto-next-group
1983   "p" gnus-summary-catchup-and-goto-prev-group
1984   "R" gnus-summary-reselect-current-group
1985   "G" gnus-summary-rescan-group
1986   "N" gnus-summary-next-group
1987   "s" gnus-summary-save-newsrc
1988   "P" gnus-summary-prev-group)
1989
1990 (gnus-define-keys (gnus-summary-article-map "A" gnus-summary-mode-map)
1991   " " gnus-summary-next-page
1992   "n" gnus-summary-next-page
1993   "\177" gnus-summary-prev-page
1994   [delete] gnus-summary-prev-page
1995   "p" gnus-summary-prev-page
1996   "\r" gnus-summary-scroll-up
1997   "\M-\r" gnus-summary-scroll-down
1998   "<" gnus-summary-beginning-of-article
1999   ">" gnus-summary-end-of-article
2000   "b" gnus-summary-beginning-of-article
2001   "e" gnus-summary-end-of-article
2002   "^" gnus-summary-refer-parent-article
2003   "r" gnus-summary-refer-parent-article
2004   "D" gnus-summary-enter-digest-group
2005   "R" gnus-summary-refer-references
2006   "T" gnus-summary-refer-thread
2007   "g" gnus-summary-show-article
2008   "s" gnus-summary-isearch-article
2009   "P" gnus-summary-print-article
2010   "S" gnus-sticky-article
2011   "M" gnus-mailing-list-insinuate
2012   "t" gnus-article-babel)
2013
2014 (gnus-define-keys (gnus-summary-wash-map "W" gnus-summary-mode-map)
2015   "b" gnus-article-add-buttons
2016   "B" gnus-article-add-buttons-to-head
2017   "o" gnus-article-treat-overstrike
2018   "e" gnus-article-emphasize
2019   "w" gnus-article-fill-cited-article
2020   "Q" gnus-article-fill-long-lines
2021   "L" gnus-article-toggle-truncate-lines
2022   "C" gnus-article-capitalize-sentences
2023   "c" gnus-article-remove-cr
2024   "q" gnus-article-de-quoted-unreadable
2025   "6" gnus-article-de-base64-unreadable
2026   "Z" gnus-article-decode-HZ
2027   "A" gnus-article-treat-ansi-sequences
2028   "h" gnus-article-wash-html
2029   "u" gnus-article-unsplit-urls
2030   "s" gnus-summary-force-verify-and-decrypt
2031   "f" gnus-article-display-x-face
2032   "l" gnus-summary-stop-page-breaking
2033   "r" gnus-summary-caesar-message
2034   "m" gnus-summary-morse-message
2035   "t" gnus-summary-toggle-header
2036   "g" gnus-treat-smiley
2037   "v" gnus-summary-verbose-headers
2038   "a" gnus-article-strip-headers-in-body ;; mnemonic: wash archive
2039   "p" gnus-article-verify-x-pgp-sig
2040   "d" gnus-article-treat-dumbquotes
2041   "i" gnus-summary-idna-message)
2042
2043 (gnus-define-keys (gnus-summary-wash-deuglify-map "Y" gnus-summary-wash-map)
2044   ;; mnemonic: deuglif*Y*
2045   "u" gnus-article-outlook-unwrap-lines
2046   "a" gnus-article-outlook-repair-attribution
2047   "c" gnus-article-outlook-rearrange-citation
2048   "f" gnus-article-outlook-deuglify-article) ;; mnemonic: full deuglify
2049
2050 (gnus-define-keys (gnus-summary-wash-hide-map "W" gnus-summary-wash-map)
2051   "a" gnus-article-hide
2052   "h" gnus-article-hide-headers
2053   "b" gnus-article-hide-boring-headers
2054   "s" gnus-article-hide-signature
2055   "c" gnus-article-hide-citation
2056   "C" gnus-article-hide-citation-in-followups
2057   "l" gnus-article-hide-list-identifiers
2058   "B" gnus-article-strip-banner
2059   "P" gnus-article-hide-pem
2060   "\C-c" gnus-article-hide-citation-maybe)
2061
2062 (gnus-define-keys (gnus-summary-wash-highlight-map "H" gnus-summary-wash-map)
2063   "a" gnus-article-highlight
2064   "h" gnus-article-highlight-headers
2065   "c" gnus-article-highlight-citation
2066   "s" gnus-article-highlight-signature)
2067
2068 (gnus-define-keys (gnus-summary-wash-header-map "G" gnus-summary-wash-map)
2069   "f" gnus-article-treat-fold-headers
2070   "u" gnus-article-treat-unfold-headers
2071   "n" gnus-article-treat-fold-newsgroups)
2072
2073 (gnus-define-keys (gnus-summary-wash-display-map "D" gnus-summary-wash-map)
2074   "x" gnus-article-display-x-face
2075   "d" gnus-article-display-face
2076   "s" gnus-treat-smiley
2077   "D" gnus-article-remove-images
2078   "f" gnus-treat-from-picon
2079   "m" gnus-treat-mail-picon
2080   "n" gnus-treat-newsgroups-picon)
2081
2082 (gnus-define-keys (gnus-summary-wash-mime-map "M" gnus-summary-wash-map)
2083   "w" gnus-article-decode-mime-words
2084   "c" gnus-article-decode-charset
2085   "v" gnus-mime-view-all-parts
2086   "b" gnus-article-view-part)
2087
2088 (gnus-define-keys (gnus-summary-wash-time-map "T" gnus-summary-wash-map)
2089   "z" gnus-article-date-ut
2090   "u" gnus-article-date-ut
2091   "l" gnus-article-date-local
2092   "p" gnus-article-date-english
2093   "e" gnus-article-date-lapsed
2094   "o" gnus-article-date-original
2095   "i" gnus-article-date-iso8601
2096   "s" gnus-article-date-user)
2097
2098 (gnus-define-keys (gnus-summary-wash-empty-map "E" gnus-summary-wash-map)
2099   "t" gnus-article-remove-trailing-blank-lines
2100   "l" gnus-article-strip-leading-blank-lines
2101   "m" gnus-article-strip-multiple-blank-lines
2102   "a" gnus-article-strip-blank-lines
2103   "A" gnus-article-strip-all-blank-lines
2104   "s" gnus-article-strip-leading-space
2105   "e" gnus-article-strip-trailing-space
2106   "w" gnus-article-remove-leading-whitespace)
2107
2108 (gnus-define-keys (gnus-summary-help-map "H" gnus-summary-mode-map)
2109   "v" gnus-version
2110   "f" gnus-summary-fetch-faq
2111   "d" gnus-summary-describe-group
2112   "h" gnus-summary-describe-briefly
2113   "i" gnus-info-find-node
2114   "c" gnus-group-fetch-charter
2115   "C" gnus-group-fetch-control)
2116
2117 (gnus-define-keys (gnus-summary-backend-map "B" gnus-summary-mode-map)
2118   "e" gnus-summary-expire-articles
2119   "\M-\C-e" gnus-summary-expire-articles-now
2120   "\177" gnus-summary-delete-article
2121   [delete] gnus-summary-delete-article
2122   [backspace] gnus-summary-delete-article
2123   "m" gnus-summary-move-article
2124   "r" gnus-summary-respool-article
2125   "w" gnus-summary-edit-article
2126   "c" gnus-summary-copy-article
2127   "B" gnus-summary-crosspost-article
2128   "q" gnus-summary-respool-query
2129   "t" gnus-summary-respool-trace
2130   "i" gnus-summary-import-article
2131   "I" gnus-summary-create-article
2132   "p" gnus-summary-article-posted-p)
2133
2134 (gnus-define-keys (gnus-summary-save-map "O" gnus-summary-mode-map)
2135   "o" gnus-summary-save-article
2136   "m" gnus-summary-save-article-mail
2137   "F" gnus-summary-write-article-file
2138   "r" gnus-summary-save-article-rmail
2139   "f" gnus-summary-save-article-file
2140   "b" gnus-summary-save-article-body-file
2141   "B" gnus-summary-write-article-body-file
2142   "h" gnus-summary-save-article-folder
2143   "v" gnus-summary-save-article-vm
2144   "p" gnus-summary-pipe-output
2145   "P" gnus-summary-muttprint
2146   "s" gnus-soup-add-article)
2147
2148 (gnus-define-keys (gnus-summary-mime-map "K" gnus-summary-mode-map)
2149   "b" gnus-summary-display-buttonized
2150   "m" gnus-summary-repair-multipart
2151   "v" gnus-article-view-part
2152   "o" gnus-article-save-part
2153   "O" gnus-article-save-part-and-strip
2154   "r" gnus-article-replace-part
2155   "d" gnus-article-delete-part
2156   "t" gnus-article-view-part-as-type
2157   "j" gnus-article-jump-to-part
2158   "c" gnus-article-copy-part
2159   "C" gnus-article-view-part-as-charset
2160   "e" gnus-article-view-part-externally
2161   "H" gnus-article-browse-html-article
2162   "E" gnus-article-encrypt-body
2163   "i" gnus-article-inline-part
2164   "|" gnus-article-pipe-part)
2165
2166 (gnus-define-keys (gnus-uu-mark-map "P" gnus-summary-mark-map)
2167   "p" gnus-summary-mark-as-processable
2168   "u" gnus-summary-unmark-as-processable
2169   "U" gnus-summary-unmark-all-processable
2170   "v" gnus-uu-mark-over
2171   "s" gnus-uu-mark-series
2172   "r" gnus-uu-mark-region
2173   "g" gnus-uu-unmark-region
2174   "R" gnus-uu-mark-by-regexp
2175   "G" gnus-uu-unmark-by-regexp
2176   "t" gnus-uu-mark-thread
2177   "T" gnus-uu-unmark-thread
2178   "a" gnus-uu-mark-all
2179   "b" gnus-uu-mark-buffer
2180   "S" gnus-uu-mark-sparse
2181   "k" gnus-summary-kill-process-mark
2182   "y" gnus-summary-yank-process-mark
2183   "w" gnus-summary-save-process-mark
2184   "i" gnus-uu-invert-processable)
2185
2186 (gnus-define-keys (gnus-uu-extract-map "X" gnus-summary-mode-map)
2187   ;;"x" gnus-uu-extract-any
2188   "m" gnus-summary-save-parts
2189   "u" gnus-uu-decode-uu
2190   "U" gnus-uu-decode-uu-and-save
2191   "s" gnus-uu-decode-unshar
2192   "S" gnus-uu-decode-unshar-and-save
2193   "o" gnus-uu-decode-save
2194   "O" gnus-uu-decode-save
2195   "b" gnus-uu-decode-binhex
2196   "B" gnus-uu-decode-binhex
2197   "Y" gnus-uu-decode-yenc
2198   "p" gnus-uu-decode-postscript
2199   "P" gnus-uu-decode-postscript-and-save)
2200
2201 (gnus-define-keys
2202     (gnus-uu-extract-view-map "v" gnus-uu-extract-map)
2203   "u" gnus-uu-decode-uu-view
2204   "U" gnus-uu-decode-uu-and-save-view
2205   "s" gnus-uu-decode-unshar-view
2206   "S" gnus-uu-decode-unshar-and-save-view
2207   "o" gnus-uu-decode-save-view
2208   "O" gnus-uu-decode-save-view
2209   "b" gnus-uu-decode-binhex-view
2210   "B" gnus-uu-decode-binhex-view
2211   "p" gnus-uu-decode-postscript-view
2212   "P" gnus-uu-decode-postscript-and-save-view)
2213
2214 (defvar gnus-article-post-menu nil)
2215
2216 (defconst gnus-summary-menu-maxlen 20)
2217
2218 (defun gnus-summary-menu-split (menu)
2219   ;; If we have lots of elements, divide them into groups of 20
2220   ;; and make a pane (or submenu) for each one.
2221   (if (> (length menu) (/ (* gnus-summary-menu-maxlen 3) 2))
2222       (let ((menu menu) sublists next
2223             (i 1))
2224         (while menu
2225           ;; Pull off the next gnus-summary-menu-maxlen elements
2226           ;; and make them the next element of sublist.
2227           (setq next (nthcdr gnus-summary-menu-maxlen menu))
2228           (if next
2229               (setcdr (nthcdr (1- gnus-summary-menu-maxlen) menu)
2230                       nil))
2231           (setq sublists (cons (cons (format "%s ... %s" (aref (car menu) 0)
2232                                              (aref (car (last menu)) 0)) menu)
2233                                sublists))
2234           (setq i (1+ i))
2235           (setq menu next))
2236         (nreverse sublists))
2237     ;; Few elements--put them all in one pane.
2238     menu))
2239
2240 (defun gnus-summary-make-menu-bar ()
2241   (gnus-turn-off-edit-menu 'summary)
2242
2243   (unless (boundp 'gnus-summary-misc-menu)
2244
2245     (easy-menu-define
2246       gnus-summary-kill-menu gnus-summary-mode-map ""
2247       (cons
2248        "Score"
2249        (nconc
2250         (list
2251          ["Customize" gnus-score-customize t])
2252         (gnus-make-score-map 'increase)
2253         (gnus-make-score-map 'lower)
2254         '(("Mark"
2255            ["Kill below" gnus-summary-kill-below t]
2256            ["Mark above" gnus-summary-mark-above t]
2257            ["Tick above" gnus-summary-tick-above t]
2258            ["Clear above" gnus-summary-clear-above t])
2259           ["Current score" gnus-summary-current-score t]
2260           ["Set score" gnus-summary-set-score t]
2261           ["Switch current score file..." gnus-score-change-score-file t]
2262           ["Set mark below..." gnus-score-set-mark-below t]
2263           ["Set expunge below..." gnus-score-set-expunge-below t]
2264           ["Edit current score file" gnus-score-edit-current-scores t]
2265           ["Edit score file" gnus-score-edit-file t]
2266           ["Trace score" gnus-score-find-trace t]
2267           ["Find words" gnus-score-find-favourite-words t]
2268           ["Rescore buffer" gnus-summary-rescore t]
2269           ["Increase score..." gnus-summary-increase-score t]
2270           ["Lower score..." gnus-summary-lower-score t]))))
2271
2272     ;; Define both the Article menu in the summary buffer and the
2273     ;; equivalent Commands menu in the article buffer here for
2274     ;; consistency.
2275     (let ((innards
2276            `(("Hide"
2277               ["All" gnus-article-hide t]
2278               ["Headers" gnus-article-hide-headers t]
2279               ["Signature" gnus-article-hide-signature t]
2280               ["Citation" gnus-article-hide-citation t]
2281               ["List identifiers" gnus-article-hide-list-identifiers t]
2282               ["Banner" gnus-article-strip-banner t]
2283               ["Boring headers" gnus-article-hide-boring-headers t])
2284              ("Highlight"
2285               ["All" gnus-article-highlight t]
2286               ["Headers" gnus-article-highlight-headers t]
2287               ["Signature" gnus-article-highlight-signature t]
2288               ["Citation" gnus-article-highlight-citation t])
2289              ("MIME"
2290               ["Words" gnus-article-decode-mime-words t]
2291               ["Charset" gnus-article-decode-charset t]
2292               ["QP" gnus-article-de-quoted-unreadable t]
2293               ["Base64" gnus-article-de-base64-unreadable t]
2294               ["View MIME buttons" gnus-summary-display-buttonized t]
2295               ["View all" gnus-mime-view-all-parts t]
2296               ["Verify and Decrypt" gnus-summary-force-verify-and-decrypt t]
2297               ["Encrypt body" gnus-article-encrypt-body
2298                :active (not (gnus-group-read-only-p))
2299                ,@(if (featurep 'xemacs) nil
2300                    '(:help "Encrypt the message body on disk"))]
2301               ["Extract all parts..." gnus-summary-save-parts t]
2302               ("Multipart"
2303                ["Repair multipart" gnus-summary-repair-multipart t]
2304                ["Pipe part..." gnus-article-pipe-part t]
2305                ["Inline part" gnus-article-inline-part t]
2306                ["View part as type..." gnus-article-view-part-as-type t]
2307                ["Encrypt body" gnus-article-encrypt-body
2308                 :active (not (gnus-group-read-only-p))
2309                ,@(if (featurep 'xemacs) nil
2310                    '(:help "Encrypt the message body on disk"))]
2311                ["View part externally" gnus-article-view-part-externally t]
2312                ["View HTML parts in browser" gnus-article-browse-html-article t]
2313                ["View part with charset..." gnus-article-view-part-as-charset t]
2314                ["Copy part" gnus-article-copy-part t]
2315                ["Save part..." gnus-article-save-part t]
2316                ["View part" gnus-article-view-part t]))
2317              ("Date"
2318               ["Local" gnus-article-date-local t]
2319               ["ISO8601" gnus-article-date-iso8601 t]
2320               ["UT" gnus-article-date-ut t]
2321               ["Original" gnus-article-date-original t]
2322               ["Lapsed" gnus-article-date-lapsed t]
2323               ["User-defined" gnus-article-date-user t])
2324              ("Display"
2325               ["Remove images" gnus-article-remove-images t]
2326               ["Toggle smiley" gnus-treat-smiley t]
2327               ["Show X-Face" gnus-article-display-x-face t]
2328               ["Show picons in From" gnus-treat-from-picon t]
2329               ["Show picons in mail headers" gnus-treat-mail-picon t]
2330               ["Show picons in news headers" gnus-treat-newsgroups-picon t]
2331               ("View as different encoding"
2332                ,@(gnus-summary-menu-split
2333                   (mapcar
2334                    (lambda (cs)
2335                      ;; Since easymenu under Emacs doesn't allow
2336                      ;; lambda forms for menu commands, we should
2337                      ;; provide intern'ed function symbols.
2338                      (let ((command (intern (format "\
2339 gnus-summary-show-article-from-menu-as-charset-%s" cs))))
2340                        (fset command
2341                              `(lambda ()
2342                                 (interactive)
2343                                 (let ((gnus-summary-show-article-charset-alist
2344                                        '((1 . ,cs))))
2345                                   (gnus-summary-show-article 1))))
2346                        `[,(symbol-name cs) ,command t]))
2347                    (sort (if (fboundp 'coding-system-list)
2348                              (coding-system-list)
2349                            (mapcar 'car mm-mime-mule-charset-alist))
2350                          'string<)))))
2351              ("Washing"
2352               ("Remove Blanks"
2353                ["Leading" gnus-article-strip-leading-blank-lines t]
2354                ["Multiple" gnus-article-strip-multiple-blank-lines t]
2355                ["Trailing" gnus-article-remove-trailing-blank-lines t]
2356                ["All of the above" gnus-article-strip-blank-lines t]
2357                ["All" gnus-article-strip-all-blank-lines t]
2358                ["Leading space" gnus-article-strip-leading-space t]
2359                ["Trailing space" gnus-article-strip-trailing-space t]
2360                ["Leading space in headers"
2361                 gnus-article-remove-leading-whitespace t])
2362               ["Overstrike" gnus-article-treat-overstrike t]
2363               ["Dumb quotes" gnus-article-treat-dumbquotes t]
2364               ["Emphasis" gnus-article-emphasize t]
2365               ["Word wrap" gnus-article-fill-cited-article t]
2366               ["Fill long lines" gnus-article-fill-long-lines t]
2367               ["Toggle truncate long lines" gnus-article-toggle-truncate-lines t]
2368               ["Capitalize sentences" gnus-article-capitalize-sentences t]
2369               ["Remove CR" gnus-article-remove-cr t]
2370               ["Quoted-Printable" gnus-article-de-quoted-unreadable t]
2371               ["Base64" gnus-article-de-base64-unreadable t]
2372               ["Rot 13" gnus-summary-caesar-message
2373                ,@(if (featurep 'xemacs) '(t)
2374                    '(:help "\"Caesar rotate\" article by 13"))]
2375               ["De-IDNA" gnus-summary-idna-message t]
2376               ["Morse decode" gnus-summary-morse-message t]
2377               ["Unix pipe..." gnus-summary-pipe-message t]
2378               ["Add buttons" gnus-article-add-buttons t]
2379               ["Add buttons to head" gnus-article-add-buttons-to-head t]
2380               ["Stop page breaking" gnus-summary-stop-page-breaking t]
2381               ["Verbose header" gnus-summary-verbose-headers t]
2382               ["Toggle header" gnus-summary-toggle-header t]
2383               ["Unfold headers" gnus-article-treat-unfold-headers t]
2384               ["Fold newsgroups" gnus-article-treat-fold-newsgroups t]
2385               ["Html" gnus-article-wash-html t]
2386               ["Unsplit URLs" gnus-article-unsplit-urls t]
2387               ["Verify X-PGP-Sig" gnus-article-verify-x-pgp-sig t]
2388               ["Decode HZ" gnus-article-decode-HZ t]
2389               ["ANSI sequences" gnus-article-treat-ansi-sequences t]
2390               ("(Outlook) Deuglify"
2391                ["Unwrap lines" gnus-article-outlook-unwrap-lines t]
2392                ["Repair attribution" gnus-article-outlook-repair-attribution t]
2393                ["Rearrange citation" gnus-article-outlook-rearrange-citation t]
2394                ["Full (Outlook) deuglify"
2395                 gnus-article-outlook-deuglify-article t])
2396               )
2397              ("Output"
2398               ["Save in default format..." gnus-summary-save-article
2399                ,@(if (featurep 'xemacs) '(t)
2400                    '(:help "Save article using default method"))]
2401               ["Save in file..." gnus-summary-save-article-file
2402                ,@(if (featurep 'xemacs) '(t)
2403                    '(:help "Save article in file"))]
2404               ["Save in Unix mail format..." gnus-summary-save-article-mail t]
2405               ["Save in MH folder..." gnus-summary-save-article-folder t]
2406               ["Save in VM folder..." gnus-summary-save-article-vm t]
2407               ["Save in RMAIL mbox..." gnus-summary-save-article-rmail t]
2408               ["Save body in file..." gnus-summary-save-article-body-file t]
2409               ["Pipe through a filter..." gnus-summary-pipe-output t]
2410               ["Add to SOUP packet" gnus-soup-add-article t]
2411               ["Print with Muttprint..." gnus-summary-muttprint t]
2412               ["Print" gnus-summary-print-article
2413                ,@(if (featurep 'xemacs) '(t)
2414                    '(:help "Generate and print a PostScript image"))])
2415              ("Copy, move,... (Backend)"
2416               ,@(if (featurep 'xemacs) nil
2417                   '(:help "Copying, moving, expiring articles..."))
2418               ["Respool article..." gnus-summary-respool-article t]
2419               ["Move article..." gnus-summary-move-article
2420                (gnus-check-backend-function
2421                 'request-move-article gnus-newsgroup-name)]
2422               ["Copy article..." gnus-summary-copy-article t]
2423               ["Crosspost article..." gnus-summary-crosspost-article
2424                (gnus-check-backend-function
2425                 'request-replace-article gnus-newsgroup-name)]
2426               ["Import file..." gnus-summary-import-article
2427                (gnus-check-backend-function
2428                 'request-accept-article gnus-newsgroup-name)]
2429               ["Create article..." gnus-summary-create-article
2430                (gnus-check-backend-function
2431                 'request-accept-article gnus-newsgroup-name)]
2432               ["Check if posted" gnus-summary-article-posted-p t]
2433               ["Edit article" gnus-summary-edit-article
2434                (not (gnus-group-read-only-p))]
2435               ["Delete article" gnus-summary-delete-article
2436                (gnus-check-backend-function
2437                 'request-expire-articles gnus-newsgroup-name)]
2438               ["Query respool" gnus-summary-respool-query t]
2439               ["Trace respool" gnus-summary-respool-trace t]
2440               ["Delete expirable articles" gnus-summary-expire-articles-now
2441                (gnus-check-backend-function
2442                 'request-expire-articles gnus-newsgroup-name)])
2443              ("Extract"
2444               ["Uudecode" gnus-uu-decode-uu
2445                ,@(if (featurep 'xemacs) '(t)
2446                    '(:help "Decode uuencoded article(s)"))]
2447               ["Uudecode and save" gnus-uu-decode-uu-and-save t]
2448               ["Unshar" gnus-uu-decode-unshar t]
2449               ["Unshar and save" gnus-uu-decode-unshar-and-save t]
2450               ["Save" gnus-uu-decode-save t]
2451               ["Binhex" gnus-uu-decode-binhex t]
2452               ["Postscript" gnus-uu-decode-postscript t]
2453               ["All MIME parts" gnus-summary-save-parts t])
2454              ("Cache"
2455               ["Enter article" gnus-cache-enter-article t]
2456               ["Remove article" gnus-cache-remove-article t])
2457              ["Translate" gnus-article-babel t]
2458              ["Select article buffer" gnus-summary-select-article-buffer t]
2459              ["Make article buffer sticky" gnus-sticky-article t]
2460              ["Enter digest buffer" gnus-summary-enter-digest-group t]
2461              ["Isearch article..." gnus-summary-isearch-article t]
2462              ["Beginning of the article" gnus-summary-beginning-of-article t]
2463              ["End of the article" gnus-summary-end-of-article t]
2464              ["Fetch parent of article" gnus-summary-refer-parent-article t]
2465              ["Fetch referenced articles" gnus-summary-refer-references t]
2466              ["Fetch current thread" gnus-summary-refer-thread t]
2467              ["Fetch article with id..." gnus-summary-refer-article t]
2468              ["Setup Mailing List Params" gnus-mailing-list-insinuate t]
2469              ["Redisplay" gnus-summary-show-article t]
2470              ["Raw article" gnus-summary-show-raw-article :keys "C-u g"])))
2471       (easy-menu-define
2472         gnus-summary-article-menu gnus-summary-mode-map ""
2473         (cons "Article" innards))
2474
2475       (if (not (keymapp gnus-summary-article-menu))
2476           (easy-menu-define
2477             gnus-article-commands-menu gnus-article-mode-map ""
2478             (cons "Commands" innards))
2479         ;; in Emacs, don't share menu.
2480         (setq gnus-article-commands-menu
2481               (copy-keymap gnus-summary-article-menu))
2482         (define-key gnus-article-mode-map [menu-bar commands]
2483           (cons "Commands" gnus-article-commands-menu))))
2484
2485     (easy-menu-define
2486       gnus-summary-thread-menu gnus-summary-mode-map ""
2487       '("Threads"
2488         ["Find all messages in thread" gnus-summary-refer-thread t]
2489         ["Toggle threading" gnus-summary-toggle-threads t]
2490         ["Hide threads" gnus-summary-hide-all-threads t]
2491         ["Show threads" gnus-summary-show-all-threads t]
2492         ["Hide thread" gnus-summary-hide-thread t]
2493         ["Show thread" gnus-summary-show-thread t]
2494         ["Go to next thread" gnus-summary-next-thread t]
2495         ["Go to previous thread" gnus-summary-prev-thread t]
2496         ["Go down thread" gnus-summary-down-thread t]
2497         ["Go up thread" gnus-summary-up-thread t]
2498         ["Top of thread" gnus-summary-top-thread t]
2499         ["Mark thread as read" gnus-summary-kill-thread t]
2500         ["Mark thread as expired" gnus-summary-expire-thread t]
2501         ["Lower thread score" gnus-summary-lower-thread t]
2502         ["Raise thread score" gnus-summary-raise-thread t]
2503         ["Rethread current" gnus-summary-rethread-current t]))
2504
2505     (easy-menu-define
2506       gnus-summary-post-menu gnus-summary-mode-map ""
2507       `("Post"
2508         ["Send a message (mail or news)" gnus-summary-post-news
2509          ,@(if (featurep 'xemacs) '(t)
2510              '(:help "Compose a new message (mail or news)"))]
2511         ["Followup" gnus-summary-followup
2512          ,@(if (featurep 'xemacs) '(t)
2513              '(:help "Post followup to this article"))]
2514         ["Followup and yank" gnus-summary-followup-with-original
2515          ,@(if (featurep 'xemacs) '(t)
2516              '(:help "Post followup to this article, quoting its contents"))]
2517         ["Supersede article" gnus-summary-supersede-article t]
2518         ["Cancel article" gnus-summary-cancel-article
2519          ,@(if (featurep 'xemacs) '(t)
2520              '(:help "Cancel an article you posted"))]
2521         ["Reply" gnus-summary-reply t]
2522         ["Reply and yank" gnus-summary-reply-with-original t]
2523         ["Wide reply" gnus-summary-wide-reply t]
2524         ["Wide reply and yank" gnus-summary-wide-reply-with-original
2525          ,@(if (featurep 'xemacs) '(t)
2526              '(:help "Mail a reply, quoting this article"))]
2527         ["Very wide reply" gnus-summary-very-wide-reply t]
2528         ["Very wide reply and yank" gnus-summary-very-wide-reply-with-original
2529          ,@(if (featurep 'xemacs) '(t)
2530              '(:help "Mail a very wide reply, quoting this article"))]
2531         ["Mail forward" gnus-summary-mail-forward t]
2532         ["Post forward" gnus-summary-post-forward t]
2533         ["Digest and mail" gnus-uu-digest-mail-forward t]
2534         ["Digest and post" gnus-uu-digest-post-forward t]
2535         ["Resend message" gnus-summary-resend-message t]
2536         ["Resend message edit" gnus-summary-resend-message-edit t]
2537         ["Send bounced mail" gnus-summary-resend-bounced-mail t]
2538         ["Send a mail" gnus-summary-mail-other-window t]
2539         ["Create a local message" gnus-summary-news-other-window t]
2540         ["Uuencode and post" gnus-uu-post-news
2541          ,@(if (featurep 'xemacs) '(t)
2542              '(:help "Post a uuencoded article"))]
2543         ["Followup via news" gnus-summary-followup-to-mail t]
2544         ["Followup via news and yank"
2545          gnus-summary-followup-to-mail-with-original t]
2546         ;;("Draft"
2547         ;;["Send" gnus-summary-send-draft t]
2548         ;;["Send bounced" gnus-resend-bounced-mail t])
2549         ))
2550
2551     (cond
2552      ((not (keymapp gnus-summary-post-menu))
2553       (setq gnus-article-post-menu gnus-summary-post-menu))
2554      ((not gnus-article-post-menu)
2555       ;; Don't share post menu.
2556       (setq gnus-article-post-menu
2557             (copy-keymap gnus-summary-post-menu))))
2558     (define-key gnus-article-mode-map [menu-bar post]
2559       (cons "Post" gnus-article-post-menu))
2560
2561     (easy-menu-define
2562       gnus-summary-misc-menu gnus-summary-mode-map ""
2563       `("Gnus"
2564         ("Mark Read"
2565          ["Mark as read" gnus-summary-mark-as-read-forward t]
2566          ["Mark same subject and select"
2567           gnus-summary-kill-same-subject-and-select t]
2568          ["Mark same subject" gnus-summary-kill-same-subject t]
2569          ["Catchup" gnus-summary-catchup
2570           ,@(if (featurep 'xemacs) '(t)
2571               '(:help "Mark unread articles in this group as read"))]
2572          ["Catchup all" gnus-summary-catchup-all t]
2573          ["Catchup to here" gnus-summary-catchup-to-here t]
2574          ["Catchup from here" gnus-summary-catchup-from-here t]
2575          ["Catchup region" gnus-summary-mark-region-as-read
2576           (gnus-mark-active-p)]
2577          ["Mark excluded" gnus-summary-limit-mark-excluded-as-read t])
2578         ("Mark Various"
2579          ["Tick" gnus-summary-tick-article-forward t]
2580          ["Mark as dormant" gnus-summary-mark-as-dormant t]
2581          ["Remove marks" gnus-summary-clear-mark-forward t]
2582          ["Set expirable mark" gnus-summary-mark-as-expirable t]
2583          ["Set bookmark" gnus-summary-set-bookmark t]
2584          ["Remove bookmark" gnus-summary-remove-bookmark t])
2585         ("Registry Mark"
2586          ["Important"     gnus-registry-set-article-Important-mark    t]
2587          ["Not Important" gnus-registry-remove-article-Important-mark t]
2588          ["Work"          gnus-registry-set-article-Work-mark         t]
2589          ["Not Work"      gnus-registry-remove-article-Work-mark      t]
2590          ["Later"         gnus-registry-set-article-Later-mark        t]
2591          ["Not Later"     gnus-registry-remove-article-Later-mark     t]
2592          ["Personal"      gnus-registry-set-article-Personal-mark     t]
2593          ["Not Personal"  gnus-registry-remove-article-Personal-mark  t]
2594          ["To Do"         gnus-registry-set-article-To-Do-mark        t]
2595          ["Not To Do"     gnus-registry-remove-article-To-Do-mark     t])
2596         ("Limit to"
2597          ["Marks..." gnus-summary-limit-to-marks t]
2598          ["Subject..." gnus-summary-limit-to-subject t]
2599          ["Author..." gnus-summary-limit-to-author t]
2600          ["Recipient..." gnus-summary-limit-to-recipient t]
2601          ["Address..." gnus-summary-limit-to-address t]
2602          ["Age..." gnus-summary-limit-to-age t]
2603          ["Extra..." gnus-summary-limit-to-extra t]
2604          ["Score..." gnus-summary-limit-to-score t]
2605          ["Display Predicate" gnus-summary-limit-to-display-predicate t]
2606          ["Unread" gnus-summary-limit-to-unread t]
2607          ["Unseen" gnus-summary-limit-to-unseen t]
2608          ["Singletons" gnus-summary-limit-to-singletons t]
2609          ["Replied" gnus-summary-limit-to-replied t]
2610          ["Non-dormant" gnus-summary-limit-exclude-dormant t]
2611          ["Next or process marked articles" gnus-summary-limit-to-articles t]
2612          ["Pop limit" gnus-summary-pop-limit t]
2613          ["Show dormant" gnus-summary-limit-include-dormant t]
2614          ["Hide childless dormant"
2615           gnus-summary-limit-exclude-childless-dormant t]
2616          ;;["Hide thread" gnus-summary-limit-exclude-thread t]
2617          ["Hide marked" gnus-summary-limit-exclude-marks t]
2618          ["Show expunged" gnus-summary-limit-include-expunged t])
2619         ("Process Mark"
2620          ["Set mark" gnus-summary-mark-as-processable t]
2621          ["Remove mark" gnus-summary-unmark-as-processable t]
2622          ["Remove all marks" gnus-summary-unmark-all-processable t]
2623          ["Invert marks" gnus-uu-invert-processable t]
2624          ["Mark above" gnus-uu-mark-over t]
2625          ["Mark series" gnus-uu-mark-series t]
2626          ["Mark region" gnus-uu-mark-region (gnus-mark-active-p)]
2627          ["Unmark region" gnus-uu-unmark-region (gnus-mark-active-p)]
2628          ["Mark by regexp..." gnus-uu-mark-by-regexp t]
2629          ["Unmark by regexp..." gnus-uu-unmark-by-regexp t]
2630          ["Mark all" gnus-uu-mark-all t]
2631          ["Mark buffer" gnus-uu-mark-buffer t]
2632          ["Mark sparse" gnus-uu-mark-sparse t]
2633          ["Mark thread" gnus-uu-mark-thread t]
2634          ["Unmark thread" gnus-uu-unmark-thread t]
2635          ("Process Mark Sets"
2636           ["Kill" gnus-summary-kill-process-mark t]
2637           ["Yank" gnus-summary-yank-process-mark
2638            gnus-newsgroup-process-stack]
2639           ["Save" gnus-summary-save-process-mark t]
2640           ["Run command on marked..." gnus-summary-universal-argument t]))
2641         ("Scroll article"
2642          ["Page forward" gnus-summary-next-page
2643           ,@(if (featurep 'xemacs) '(t)
2644               '(:help "Show next page of article"))]
2645          ["Page backward" gnus-summary-prev-page
2646           ,@(if (featurep 'xemacs) '(t)
2647               '(:help "Show previous page of article"))]
2648          ["Line forward" gnus-summary-scroll-up t])
2649         ("Move"
2650          ["Next unread article" gnus-summary-next-unread-article t]
2651          ["Previous unread article" gnus-summary-prev-unread-article t]
2652          ["Next article" gnus-summary-next-article t]
2653          ["Previous article" gnus-summary-prev-article t]
2654          ["Next unread subject" gnus-summary-next-unread-subject t]
2655          ["Previous unread subject" gnus-summary-prev-unread-subject t]
2656          ["Next article same subject" gnus-summary-next-same-subject t]
2657          ["Previous article same subject" gnus-summary-prev-same-subject t]
2658          ["First unread article" gnus-summary-first-unread-article t]
2659          ["Best unread article" gnus-summary-best-unread-article t]
2660          ["Go to subject number..." gnus-summary-goto-subject t]
2661          ["Go to article number..." gnus-summary-goto-article t]
2662          ["Go to the last article" gnus-summary-goto-last-article t]
2663          ["Pop article off history" gnus-summary-pop-article t])
2664         ("Sort"
2665          ["Sort by number" gnus-summary-sort-by-number t]
2666          ["Sort by author" gnus-summary-sort-by-author t]
2667          ["Sort by recipient" gnus-summary-sort-by-recipient t]
2668          ["Sort by subject" gnus-summary-sort-by-subject t]
2669          ["Sort by date" gnus-summary-sort-by-date t]
2670          ["Sort by score" gnus-summary-sort-by-score t]
2671          ["Sort by lines" gnus-summary-sort-by-lines t]
2672          ["Sort by characters" gnus-summary-sort-by-chars t]
2673          ["Randomize" gnus-summary-sort-by-random t]
2674          ["Original sort" gnus-summary-sort-by-original t])
2675         ("Help"
2676          ["Fetch group FAQ" gnus-summary-fetch-faq t]
2677          ["Describe group" gnus-summary-describe-group t]
2678          ["Fetch charter" gnus-group-fetch-charter
2679           ,@(if (featurep 'xemacs) nil
2680               '(:help "Display the charter of the current group"))]
2681          ["Fetch control message" gnus-group-fetch-control
2682           ,@(if (featurep 'xemacs) nil
2683               '(:help "Display the archived control message for the current group"))]
2684          ["Read manual" gnus-info-find-node t])
2685         ("Modes"
2686          ["Pick and read" gnus-pick-mode t]
2687          ["Binary" gnus-binary-mode t])
2688         ("Regeneration"
2689          ["Regenerate" gnus-summary-prepare t]
2690          ["Insert cached articles" gnus-summary-insert-cached-articles t]
2691          ["Insert dormant articles" gnus-summary-insert-dormant-articles t]
2692          ["Insert ticked articles" gnus-summary-insert-ticked-articles t]
2693          ["Toggle threading" gnus-summary-toggle-threads t])
2694         ["See old articles" gnus-summary-insert-old-articles t]
2695         ["See new articles" gnus-summary-insert-new-articles t]
2696         ["Filter articles..." gnus-summary-execute-command t]
2697         ["Run command on articles..." gnus-summary-universal-argument t]
2698         ["Search articles forward..." gnus-summary-search-article-forward t]
2699         ["Search articles backward..." gnus-summary-search-article-backward t]
2700         ["Toggle line truncation" gnus-summary-toggle-truncation t]
2701         ["Expand window" gnus-summary-expand-window t]
2702         ["Expire expirable articles" gnus-summary-expire-articles
2703          (gnus-check-backend-function
2704           'request-expire-articles gnus-newsgroup-name)]
2705         ["Edit local kill file" gnus-summary-edit-local-kill t]
2706         ["Edit main kill file" gnus-summary-edit-global-kill t]
2707         ["Edit group parameters" gnus-summary-edit-parameters t]
2708         ["Customize group parameters" gnus-summary-customize-parameters t]
2709         ["Send a bug report" gnus-bug t]
2710         ("Exit"
2711          ["Catchup and exit" gnus-summary-catchup-and-exit
2712           ,@(if (featurep 'xemacs) '(t)
2713               '(:help "Mark unread articles in this group as read, then exit"))]
2714          ["Catchup all and exit" gnus-summary-catchup-all-and-exit t]
2715          ["Catchup and goto next" gnus-summary-catchup-and-goto-next-group t]
2716          ["Catchup and goto prev" gnus-summary-catchup-and-goto-prev-group t]
2717          ["Exit group" gnus-summary-exit
2718           ,@(if (featurep 'xemacs) '(t)
2719               '(:help "Exit current group, return to group selection mode"))]
2720          ["Exit group without updating" gnus-summary-exit-no-update t]
2721          ["Exit and goto next group" gnus-summary-next-group t]
2722          ["Exit and goto prev group" gnus-summary-prev-group t]
2723          ["Reselect group" gnus-summary-reselect-current-group t]
2724          ["Rescan group" gnus-summary-rescan-group t]
2725          ["Update dribble" gnus-summary-save-newsrc t])))
2726
2727     (gnus-run-hooks 'gnus-summary-menu-hook)))
2728
2729 (defvar gnus-summary-tool-bar-map nil)
2730
2731 ;; Note: The :set function in the `gnus-summary-tool-bar*' variables will only
2732 ;; affect _new_ message buffers.  We might add a function that walks thru all
2733 ;; summary-mode buffers and force the update.
2734 (defun gnus-summary-tool-bar-update (&optional symbol value)
2735   "Update summary mode toolbar.
2736 Setter function for custom variables."
2737   (setq-default gnus-summary-tool-bar-map nil)
2738   (when symbol
2739     ;; When used as ":set" function:
2740     (set-default symbol value))
2741   (when (gnus-buffer-live-p gnus-summary-buffer)
2742     (with-current-buffer gnus-summary-buffer
2743       (gnus-summary-make-tool-bar))))
2744
2745 (defcustom gnus-summary-tool-bar (if (eq gmm-tool-bar-style 'gnome)
2746                                      'gnus-summary-tool-bar-gnome
2747                                    'gnus-summary-tool-bar-retro)
2748   "Specifies the Gnus summary tool bar.
2749
2750 It can be either a list or a symbol refering to a list.  See
2751 `gmm-tool-bar-from-list' for the format of the list.  The
2752 default key map is `gnus-summary-mode-map'.
2753
2754 Pre-defined symbols include `gnus-summary-tool-bar-gnome' and
2755 `gnus-summary-tool-bar-retro'."
2756   :type '(choice (const :tag "GNOME style" gnus-summary-tool-bar-gnome)
2757                  (const :tag "Retro look"  gnus-summary-tool-bar-retro)
2758                  (repeat :tag "User defined list" gmm-tool-bar-item)
2759                  (symbol))
2760   :version "23.1" ;; No Gnus
2761   :initialize 'custom-initialize-default
2762   :set 'gnus-summary-tool-bar-update
2763   :group 'gnus-summary)
2764
2765 (defcustom gnus-summary-tool-bar-gnome
2766   '((gnus-summary-post-news "mail/compose" nil)
2767     (gnus-summary-insert-new-articles "mail/inbox" nil
2768                                       :visible (or (not gnus-agent)
2769                                                    gnus-plugged))
2770     (gnus-summary-reply-with-original "mail/reply")
2771     (gnus-summary-reply "mail/reply" nil :visible nil)
2772     (gnus-summary-followup-with-original "mail/reply-all")
2773     (gnus-summary-followup "mail/reply-all" nil :visible nil)
2774     (gnus-summary-mail-forward "mail/forward")
2775     (gnus-summary-save-article "mail/save")
2776     (gnus-summary-search-article-forward "search" nil :visible nil)
2777     (gnus-summary-print-article "print")
2778     (gnus-summary-tick-article-forward "flag-followup" nil :visible nil)
2779     ;; Some new commands that may need more suitable icons:
2780     (gnus-summary-save-newsrc "save" nil :visible nil)
2781     ;; (gnus-summary-show-article "stock_message-display" nil :visible nil)
2782     (gnus-summary-prev-article "left-arrow")
2783     (gnus-summary-next-article "right-arrow")
2784     (gnus-summary-next-page "next-page")
2785     ;; (gnus-summary-enter-digest-group "right_arrow" nil :visible nil)
2786     ;;
2787     ;; Maybe some sort-by-... could be added:
2788     ;; (gnus-summary-sort-by-author "sort-a-z" nil :visible nil)
2789     ;; (gnus-summary-sort-by-date "sort-1-9" nil :visible nil)
2790     (gnus-summary-mark-as-expirable
2791      "delete" nil
2792      :visible (gnus-check-backend-function 'request-expire-articles
2793                                            gnus-newsgroup-name))
2794     (gnus-summary-mark-as-spam
2795      "mail/spam" t
2796      :visible (and (fboundp 'spam-group-ham-contents-p)
2797                    (spam-group-ham-contents-p gnus-newsgroup-name))
2798      :help "Mark as spam")
2799     (gnus-summary-mark-as-read-forward
2800      "mail/not-spam" nil
2801      :visible (and (fboundp 'spam-group-spam-contents-p)
2802                    (spam-group-spam-contents-p gnus-newsgroup-name)))
2803     ;;
2804     (gnus-summary-exit "exit")
2805     (gmm-customize-mode "preferences" t :help "Edit mode preferences")
2806     (gnus-info-find-node "help"))
2807   "List of functions for the summary tool bar (GNOME style).
2808
2809 See `gmm-tool-bar-from-list' for the format of the list."
2810   :type '(repeat gmm-tool-bar-item)
2811   :version "23.1" ;; No Gnus
2812   :initialize 'custom-initialize-default
2813   :set 'gnus-summary-tool-bar-update
2814   :group 'gnus-summary)
2815
2816 (defcustom gnus-summary-tool-bar-retro
2817   '((gnus-summary-prev-unread-article "gnus/prev-ur")
2818     (gnus-summary-next-unread-article "gnus/next-ur")
2819     (gnus-summary-post-news "gnus/post")
2820     (gnus-summary-followup-with-original "gnus/fuwo")
2821     (gnus-summary-followup "gnus/followup")
2822     (gnus-summary-reply-with-original "gnus/reply-wo")
2823     (gnus-summary-reply "gnus/reply")
2824     (gnus-summary-caesar-message "gnus/rot13")
2825     (gnus-uu-decode-uu "gnus/uu-decode")
2826     (gnus-summary-save-article-file "gnus/save-aif")
2827     (gnus-summary-save-article "gnus/save-art")
2828     (gnus-uu-post-news "gnus/uu-post")
2829     (gnus-summary-catchup "gnus/catchup")
2830     (gnus-summary-catchup-and-exit "gnus/cu-exit")
2831     (gnus-summary-exit "gnus/exit-summ")
2832     ;; Some new command that may need more suitable icons:
2833     (gnus-summary-print-article "gnus/print" nil :visible nil)
2834     (gnus-summary-mark-as-expirable "gnus/close" nil :visible nil)
2835     (gnus-summary-save-newsrc "gnus/save" nil :visible nil)
2836     ;; (gnus-summary-enter-digest-group "gnus/right_arrow" nil :visible nil)
2837     (gnus-summary-search-article-forward "gnus/search" nil :visible nil)
2838     ;; (gnus-summary-insert-new-articles "gnus/paste" nil :visible nil)
2839     ;; (gnus-summary-toggle-threads "gnus/open" nil :visible nil)
2840     ;;
2841     (gnus-info-find-node "gnus/help" nil :visible nil))
2842   "List of functions for the summary tool bar (retro look).
2843
2844 See `gmm-tool-bar-from-list' for the format of the list."
2845   :type '(repeat gmm-tool-bar-item)
2846   :version "23.1" ;; No Gnus
2847   :initialize 'custom-initialize-default
2848   :set 'gnus-summary-tool-bar-update
2849   :group 'gnus-summary)
2850
2851 (defcustom gnus-summary-tool-bar-zap-list t
2852   "List of icon items from the global tool bar.
2853 These items are not displayed in the Gnus summary mode tool bar.
2854
2855 See `gmm-tool-bar-from-list' for the format of the list."
2856   :type 'gmm-tool-bar-zap-list
2857   :version "23.1" ;; No Gnus
2858   :initialize 'custom-initialize-default
2859   :set 'gnus-summary-tool-bar-update
2860   :group 'gnus-summary)
2861
2862 (defvar image-load-path)
2863
2864 (defun gnus-summary-make-tool-bar (&optional force)
2865   "Make a summary mode tool bar from `gnus-summary-tool-bar'.
2866 When FORCE, rebuild the tool bar."
2867   (when (and (not (featurep 'xemacs))
2868              (boundp 'tool-bar-mode)
2869              tool-bar-mode
2870              (or (not gnus-summary-tool-bar-map) force))
2871     (let* ((load-path
2872             (gmm-image-load-path-for-library "gnus"
2873                                              "mail/save.xpm"
2874                                              nil t))
2875            (image-load-path (cons (car load-path)
2876                                   (when (boundp 'image-load-path)
2877                                     image-load-path)))
2878            (map (gmm-tool-bar-from-list gnus-summary-tool-bar
2879                                         gnus-summary-tool-bar-zap-list
2880                                         'gnus-summary-mode-map)))
2881       (when map
2882         ;; Need to set `gnus-summary-tool-bar-map' because `gnus-article-mode'
2883         ;; uses it's value.
2884         (setq gnus-summary-tool-bar-map map))))
2885   (set (make-local-variable 'tool-bar-map) gnus-summary-tool-bar-map))
2886
2887 (defun gnus-score-set-default (var value)
2888   "A version of set that updates the GNU Emacs menu-bar."
2889   (set var value)
2890   ;; It is the message that forces the active status to be updated.
2891   (message ""))
2892
2893 (defun gnus-make-score-map (type)
2894   "Make a summary score map of type TYPE."
2895   (if t
2896       nil
2897     (let ((headers '(("author" "from" string)
2898                      ("subject" "subject" string)
2899                      ("article body" "body" string)
2900                      ("article head" "head" string)
2901                      ("xref" "xref" string)
2902                      ("extra header" "extra" string)
2903                      ("lines" "lines" number)
2904                      ("followups to author" "followup" string)))
2905           (types '((number ("less than" <)
2906                            ("greater than" >)
2907                            ("equal" =))
2908                    (string ("substring" s)
2909                            ("exact string" e)
2910                            ("fuzzy string" f)
2911                            ("regexp" r))))
2912           (perms '(("temporary" (current-time-string))
2913                    ("permanent" nil)
2914                    ("immediate" now)))
2915           header)
2916       (list
2917        (apply
2918         'nconc
2919         (list
2920          (if (eq type 'lower)
2921              "Lower score"
2922            "Increase score"))
2923         (let (outh)
2924           (while headers
2925             (setq header (car headers))
2926             (setq outh
2927                   (cons
2928                    (apply
2929                     'nconc
2930                     (list (car header))
2931                     (let ((ts (cdr (assoc (nth 2 header) types)))
2932                           outt)
2933                       (while ts
2934                         (setq outt
2935                               (cons
2936                                (apply
2937                                 'nconc
2938                                 (list (caar ts))
2939                                 (let ((ps perms)
2940                                       outp)
2941                                   (while ps
2942                                     (setq outp
2943                                           (cons
2944                                            (vector
2945                                             (caar ps)
2946                                             (list
2947                                              'gnus-summary-score-entry
2948                                              (nth 1 header)
2949                                              (if (or (string= (nth 1 header)
2950                                                               "head")
2951                                                      (string= (nth 1 header)
2952                                                               "body"))
2953                                                  ""
2954                                                (list 'gnus-summary-header
2955                                                      (nth 1 header)))
2956                                              (list 'quote (nth 1 (car ts)))
2957                                              (list 'gnus-score-delta-default
2958                                                    nil)
2959                                              (nth 1 (car ps))
2960                                              t)
2961                                             t)
2962                                            outp))
2963                                     (setq ps (cdr ps)))
2964                                   (list (nreverse outp))))
2965                                outt))
2966                         (setq ts (cdr ts)))
2967                       (list (nreverse outt))))
2968                    outh))
2969             (setq headers (cdr headers)))
2970           (list (nreverse outh))))))))
2971
2972
2973 (declare-function turn-on-gnus-mailing-list-mode "gnus-ml" ())
2974
2975 \f
2976
2977 (defun gnus-summary-mode (&optional group)
2978   "Major mode for reading articles.
2979
2980 All normal editing commands are switched off.
2981 \\<gnus-summary-mode-map>
2982 Each line in this buffer represents one article.  To read an
2983 article, you can, for instance, type `\\[gnus-summary-next-page]'.  To move forwards
2984 and backwards while displaying articles, type `\\[gnus-summary-next-unread-article]' and `\\[gnus-summary-prev-unread-article]',
2985 respectively.
2986
2987 You can also post articles and send mail from this buffer.  To
2988 follow up an article, type `\\[gnus-summary-followup]'.  To mail a reply to the author
2989 of an article, type `\\[gnus-summary-reply]'.
2990
2991 There are approx. one gazillion commands you can execute in this
2992 buffer; read the info pages for more information (`\\[gnus-info-find-node]').
2993
2994 The following commands are available:
2995
2996 \\{gnus-summary-mode-map}"
2997   (interactive)
2998   (kill-all-local-variables)
2999   (let ((gnus-summary-local-variables gnus-newsgroup-variables))
3000     (gnus-summary-make-local-variables))
3001   (gnus-summary-make-local-variables)
3002   (setq gnus-newsgroup-name group)
3003   (when (gnus-visual-p 'summary-menu 'menu)
3004     (gnus-summary-make-menu-bar)
3005     (gnus-summary-make-tool-bar))
3006   (gnus-make-thread-indent-array)
3007   (gnus-simplify-mode-line)
3008   (setq major-mode 'gnus-summary-mode)
3009   (setq mode-name "Summary")
3010   (make-local-variable 'minor-mode-alist)
3011   (use-local-map gnus-summary-mode-map)
3012   (buffer-disable-undo)
3013   (setq buffer-read-only t              ;Disable modification
3014         show-trailing-whitespace nil)
3015   (setq truncate-lines t)
3016   (setq selective-display t)
3017   (setq selective-display-ellipses t)   ;Display `...'
3018   (gnus-summary-set-display-table)
3019   (gnus-set-default-directory)
3020   (make-local-variable 'gnus-summary-line-format)
3021   (make-local-variable 'gnus-summary-line-format-spec)
3022   (make-local-variable 'gnus-summary-dummy-line-format)
3023   (make-local-variable 'gnus-summary-dummy-line-format-spec)
3024   (make-local-variable 'gnus-summary-mark-positions)
3025   (gnus-make-local-hook 'pre-command-hook)
3026   (add-hook 'pre-command-hook 'gnus-set-global-variables nil t)
3027   (gnus-run-mode-hooks 'gnus-summary-mode-hook)
3028   (turn-on-gnus-mailing-list-mode)
3029   (mm-enable-multibyte)
3030   (gnus-update-format-specifications nil 'summary 'summary-mode 'summary-dummy)
3031   (gnus-update-summary-mark-positions))
3032
3033 (defun gnus-summary-make-local-variables ()
3034   "Make all the local summary buffer variables."
3035   (let (global)
3036     (dolist (local gnus-summary-local-variables)
3037       (if (consp local)
3038           (progn
3039             (if (eq (cdr local) 'global)
3040                 ;; Copy the global value of the variable.
3041                 (setq global (symbol-value (car local)))
3042               ;; Use the value from the list.
3043               (setq global (eval (cdr local))))
3044             (set (make-local-variable (car local)) global))
3045         ;; Simple nil-valued local variable.
3046         (set (make-local-variable local) nil)))))
3047
3048 (defun gnus-summary-clear-local-variables ()
3049   (let ((locals gnus-summary-local-variables))
3050     (while locals
3051       (if (consp (car locals))
3052           (and (symbolp (caar locals))
3053                (set (caar locals) nil))
3054         (and (symbolp (car locals))
3055              (set (car locals) nil)))
3056       (setq locals (cdr locals)))))
3057
3058 ;; Summary data functions.
3059
3060 (defmacro gnus-data-number (data)
3061   `(car ,data))
3062
3063 (defmacro gnus-data-set-number (data number)
3064   `(setcar ,data ,number))
3065
3066 (defmacro gnus-data-mark (data)
3067   `(nth 1 ,data))
3068
3069 (defmacro gnus-data-set-mark (data mark)
3070   `(setcar (nthcdr 1 ,data) ,mark))
3071
3072 (defmacro gnus-data-pos (data)
3073   `(nth 2 ,data))
3074
3075 (defmacro gnus-data-set-pos (data pos)
3076   `(setcar (nthcdr 2 ,data) ,pos))
3077
3078 (defmacro gnus-data-header (data)
3079   `(nth 3 ,data))
3080
3081 (defmacro gnus-data-set-header (data header)
3082   `(setf (nth 3 ,data) ,header))
3083
3084 (defmacro gnus-data-level (data)
3085   `(nth 4 ,data))
3086
3087 (defmacro gnus-data-unread-p (data)
3088   `(= (nth 1 ,data) gnus-unread-mark))
3089
3090 (defmacro gnus-data-read-p (data)
3091   `(/= (nth 1 ,data) gnus-unread-mark))
3092
3093 (defmacro gnus-data-pseudo-p (data)
3094   `(consp (nth 3 ,data)))
3095
3096 (defmacro gnus-data-find (number)
3097   `(assq ,number gnus-newsgroup-data))
3098
3099 (defmacro gnus-data-find-list (number &optional data)
3100   `(let ((bdata ,(or data 'gnus-newsgroup-data)))
3101      (memq (assq ,number bdata)
3102            bdata)))
3103
3104 (defmacro gnus-data-make (number mark pos header level)
3105   `(list ,number ,mark ,pos ,header ,level))
3106
3107 (defun gnus-data-enter (after-article number mark pos header level offset)
3108   (let ((data (gnus-data-find-list after-article)))
3109     (unless data
3110       (error "No such article: %d" after-article))
3111     (setcdr data (cons (gnus-data-make number mark pos header level)
3112                        (cdr data)))
3113     (setq gnus-newsgroup-data-reverse nil)
3114     (gnus-data-update-list (cddr data) offset)))
3115
3116 (defun gnus-data-enter-list (after-article list &optional offset)
3117   (when list
3118     (let ((data (and after-article (gnus-data-find-list after-article)))
3119           (ilist list))
3120       (if (not (or data
3121                    after-article))
3122           (let ((odata gnus-newsgroup-data))
3123             (setq gnus-newsgroup-data (nconc list gnus-newsgroup-data))
3124             (when offset
3125               (gnus-data-update-list odata offset)))
3126         ;; Find the last element in the list to be spliced into the main
3127         ;; list.
3128         (setq list (last list))
3129         (if (not data)
3130             (progn
3131               (setcdr list gnus-newsgroup-data)
3132               (setq gnus-newsgroup-data ilist)
3133               (when offset
3134                 (gnus-data-update-list (cdr list) offset)))
3135           (setcdr list (cdr data))
3136           (setcdr data ilist)
3137           (when offset
3138             (gnus-data-update-list (cdr list) offset))))
3139       (setq gnus-newsgroup-data-reverse nil))))
3140
3141 (defun gnus-data-remove (article &optional offset)
3142   (let ((data gnus-newsgroup-data))
3143     (if (= (gnus-data-number (car data)) article)
3144         (progn
3145           (setq gnus-newsgroup-data (cdr gnus-newsgroup-data)
3146                 gnus-newsgroup-data-reverse nil)
3147           (when offset
3148             (gnus-data-update-list gnus-newsgroup-data offset)))
3149       (while (cdr data)
3150         (when (= (gnus-data-number (cadr data)) article)
3151           (setcdr data (cddr data))
3152           (when offset
3153             (gnus-data-update-list (cdr data) offset))
3154           (setq data nil
3155                 gnus-newsgroup-data-reverse nil))
3156         (setq data (cdr data))))))
3157
3158 (defmacro gnus-data-list (backward)
3159   `(if ,backward
3160        (or gnus-newsgroup-data-reverse
3161            (setq gnus-newsgroup-data-reverse
3162                  (reverse gnus-newsgroup-data)))
3163      gnus-newsgroup-data))
3164
3165 (defun gnus-data-update-list (data offset)
3166   "Add OFFSET to the POS of all data entries in DATA."
3167   (setq gnus-newsgroup-data-reverse nil)
3168   (while data
3169     (setcar (nthcdr 2 (car data)) (+ offset (nth 2 (car data))))
3170     (setq data (cdr data))))
3171
3172 (defun gnus-summary-article-pseudo-p (article)
3173   "Say whether this article is a pseudo article or not."
3174   (not (vectorp (gnus-data-header (gnus-data-find article)))))
3175
3176 (defmacro gnus-summary-article-sparse-p (article)
3177   "Say whether this article is a sparse article or not."
3178   `(memq ,article gnus-newsgroup-sparse))
3179
3180 (defmacro gnus-summary-article-ancient-p (article)
3181   "Say whether this article is a sparse article or not."
3182   `(memq ,article gnus-newsgroup-ancient))
3183
3184 (defun gnus-article-parent-p (number)
3185   "Say whether this article is a parent or not."
3186   (let ((data (gnus-data-find-list number)))
3187     (and (cdr data)              ; There has to be an article after...
3188          (< (gnus-data-level (car data)) ; And it has to have a higher level.
3189             (gnus-data-level (nth 1 data))))))
3190
3191 (defun gnus-article-children (number)
3192   "Return a list of all children to NUMBER."
3193   (let* ((data (gnus-data-find-list number))
3194          (level (gnus-data-level (car data)))
3195          children)
3196     (setq data (cdr data))
3197     (while (and data
3198                 (= (gnus-data-level (car data)) (1+ level)))
3199       (push (gnus-data-number (car data)) children)
3200       (setq data (cdr data)))
3201     children))
3202
3203 (defmacro gnus-summary-skip-intangible ()
3204   "If the current article is intangible, then jump to a different article."
3205   '(let ((to (get-text-property (point) 'gnus-intangible)))
3206      (and to (gnus-summary-goto-subject to))))
3207
3208 (defmacro gnus-summary-article-intangible-p ()
3209   "Say whether this article is intangible or not."
3210   '(get-text-property (point) 'gnus-intangible))
3211
3212 (defun gnus-article-read-p (article)
3213   "Say whether ARTICLE is read or not."
3214   (not (or (memq article gnus-newsgroup-marked)
3215            (memq article gnus-newsgroup-spam-marked)
3216            (memq article gnus-newsgroup-unreads)
3217            (memq article gnus-newsgroup-unselected)
3218            (memq article gnus-newsgroup-dormant))))
3219
3220 ;; Some summary mode macros.
3221
3222 (defmacro gnus-summary-article-number ()
3223   "The article number of the article on the current line.
3224 If there isn't an article number here, then we return the current
3225 article number."
3226   '(progn
3227      (gnus-summary-skip-intangible)
3228      (or (get-text-property (point) 'gnus-number)
3229          (gnus-summary-last-subject))))
3230
3231 (defmacro gnus-summary-article-header (&optional number)
3232   "Return the header of article NUMBER."
3233   `(gnus-data-header (gnus-data-find
3234                       ,(or number '(gnus-summary-article-number)))))
3235
3236 (defmacro gnus-summary-thread-level (&optional number)
3237   "Return the level of thread that starts with article NUMBER."
3238   `(if (and (eq gnus-summary-make-false-root 'dummy)
3239             (get-text-property (point) 'gnus-intangible))
3240        0
3241      (gnus-data-level (gnus-data-find
3242                        ,(or number '(gnus-summary-article-number))))))
3243
3244 (defmacro gnus-summary-article-mark (&optional number)
3245   "Return the mark of article NUMBER."
3246   `(gnus-data-mark (gnus-data-find
3247                     ,(or number '(gnus-summary-article-number)))))
3248
3249 (defmacro gnus-summary-article-pos (&optional number)
3250   "Return the position of the line of article NUMBER."
3251   `(gnus-data-pos (gnus-data-find
3252                    ,(or number '(gnus-summary-article-number)))))
3253
3254 (defalias 'gnus-summary-subject-string 'gnus-summary-article-subject)
3255 (defmacro gnus-summary-article-subject (&optional number)
3256   "Return current subject string or nil if nothing."
3257   `(let ((headers
3258           ,(if number
3259                `(gnus-data-header (assq ,number gnus-newsgroup-data))
3260              '(gnus-data-header (assq (gnus-summary-article-number)
3261                                       gnus-newsgroup-data)))))
3262      (and headers
3263           (vectorp headers)
3264           (mail-header-subject headers))))
3265
3266 (defmacro gnus-summary-article-score (&optional number)
3267   "Return current article score."
3268   `(or (cdr (assq ,(or number '(gnus-summary-article-number))
3269                   gnus-newsgroup-scored))
3270        gnus-summary-default-score 0))
3271
3272 (defun gnus-summary-article-children (&optional number)
3273   "Return a list of article numbers that are children of article NUMBER."
3274   (let* ((data (gnus-data-find-list (or number (gnus-summary-article-number))))
3275          (level (gnus-data-level (car data)))
3276          l children)
3277     (while (and (setq data (cdr data))
3278                 (> (setq l (gnus-data-level (car data))) level))
3279       (and (= (1+ level) l)
3280            (push (gnus-data-number (car data))
3281                  children)))
3282     (nreverse children)))
3283
3284 (defun gnus-summary-article-parent (&optional number)
3285   "Return the article number of the parent of article NUMBER."
3286   (let* ((data (gnus-data-find-list (or number (gnus-summary-article-number))
3287                                     (gnus-data-list t)))
3288          (level (gnus-data-level (car data))))
3289     (if (zerop level)
3290         ()                              ; This is a root.
3291       ;; We search until we find an article with a level less than
3292       ;; this one.  That function has to be the parent.
3293       (while (and (setq data (cdr data))
3294                   (not (< (gnus-data-level (car data)) level))))
3295       (and data (gnus-data-number (car data))))))
3296
3297 (defun gnus-unread-mark-p (mark)
3298   "Say whether MARK is the unread mark."
3299   (= mark gnus-unread-mark))
3300
3301 (defun gnus-read-mark-p (mark)
3302   "Say whether MARK is one of the marks that mark as read.
3303 This is all marks except unread, ticked, dormant, and expirable."
3304   (not (or (= mark gnus-unread-mark)
3305            (= mark gnus-ticked-mark)
3306            (= mark gnus-spam-mark)
3307            (= mark gnus-dormant-mark)
3308            (= mark gnus-expirable-mark))))
3309
3310 (defmacro gnus-article-mark (number)
3311   "Return the MARK of article NUMBER.
3312 This macro should only be used when computing the mark the \"first\"
3313 time; i.e., when generating the summary lines.  After that,
3314 `gnus-summary-article-mark' should be used to examine the
3315 marks of articles."
3316   `(cond
3317     ((memq ,number gnus-newsgroup-unsendable) gnus-unsendable-mark)
3318     ((memq ,number gnus-newsgroup-downloadable) gnus-downloadable-mark)
3319     ((memq ,number gnus-newsgroup-unreads) gnus-unread-mark)
3320     ((memq ,number gnus-newsgroup-marked) gnus-ticked-mark)
3321     ((memq ,number gnus-newsgroup-spam-marked) gnus-spam-mark)
3322     ((memq ,number gnus-newsgroup-dormant) gnus-dormant-mark)
3323     ((memq ,number gnus-newsgroup-expirable) gnus-expirable-mark)
3324     (t (or (cdr (assq ,number gnus-newsgroup-reads))
3325            gnus-ancient-mark))))
3326
3327 ;; Saving hidden threads.
3328
3329 (defmacro gnus-save-hidden-threads (&rest forms)
3330   "Save hidden threads, eval FORMS, and restore the hidden threads."
3331   (let ((config (make-symbol "config")))
3332     `(let ((,config (gnus-hidden-threads-configuration)))
3333        (unwind-protect
3334            (save-excursion
3335              ,@forms)
3336          (gnus-restore-hidden-threads-configuration ,config)))))
3337 (put 'gnus-save-hidden-threads 'lisp-indent-function 0)
3338 (put 'gnus-save-hidden-threads 'edebug-form-spec '(body))
3339
3340 (defun gnus-data-compute-positions ()
3341   "Compute the positions of all articles."
3342   (setq gnus-newsgroup-data-reverse nil)
3343   (let ((data gnus-newsgroup-data))
3344     (save-excursion
3345       (gnus-save-hidden-threads
3346         (gnus-summary-show-all-threads)
3347         (goto-char (point-min))
3348         (while data
3349           (while (get-text-property (point) 'gnus-intangible)
3350             (forward-line 1))
3351           (gnus-data-set-pos (car data) (+ (point) 3))
3352           (setq data (cdr data))
3353           (forward-line 1))))))
3354
3355 (defun gnus-hidden-threads-configuration ()
3356   "Return the current hidden threads configuration."
3357   (save-excursion
3358     (let (config)
3359       (goto-char (point-min))
3360       (while (search-forward "\r" nil t)
3361         (push (1- (point)) config))
3362       config)))
3363
3364 (defun gnus-restore-hidden-threads-configuration (config)
3365   "Restore hidden threads configuration from CONFIG."
3366   (save-excursion
3367     (let (point (inhibit-read-only t))
3368       (while (setq point (pop config))
3369         (when (and (< point (point-max))
3370                    (goto-char point)
3371                    (eq (char-after) ?\n))
3372           (subst-char-in-region point (1+ point) ?\n ?\r))))))
3373
3374 ;; Various summary mode internalish functions.
3375
3376 (defun gnus-mouse-pick-article (e)
3377   (interactive "e")
3378   (mouse-set-point e)
3379   (gnus-summary-next-page nil t))
3380
3381 (defun gnus-summary-set-display-table ()
3382   "Change the display table.
3383 Odd characters have a tendency to mess
3384 up nicely formatted displays - we make all possible glyphs
3385 display only a single character."
3386
3387   ;; We start from the standard display table, if any.
3388   (let ((table (or (copy-sequence standard-display-table)
3389                    (make-display-table)))
3390         (i 32))
3391     ;; Nix out all the control chars...
3392     (while (>= (setq i (1- i)) 0)
3393       (aset table i [??]))
3394    ;; ... but not newline and cr, of course.  (cr is necessary for the
3395     ;; selective display).
3396     (aset table ?\n nil)
3397     (aset table ?\r nil)
3398     ;; We keep TAB as well.
3399     (aset table ?\t nil)
3400     ;; We nix out any glyphs 127 through 255, or 127 through 159 in
3401     ;; Emacs 23 (unicode), that are not set already.
3402     (let ((i (if (ignore-errors (= (make-char 'latin-iso8859-1 160) 160))
3403                  160
3404                256)))
3405       (while (>= (setq i (1- i)) 127)
3406         ;; Only modify if the entry is nil.
3407         (unless (aref table i)
3408           (aset table i [??]))))
3409     (setq buffer-display-table table)))
3410
3411 (defun gnus-summary-set-article-display-arrow (pos)
3412   "Update the overlay arrow to point to line at position POS."
3413   (when (and gnus-summary-display-arrow
3414              (boundp 'overlay-arrow-position)
3415              (boundp 'overlay-arrow-string))
3416     (save-excursion
3417       (goto-char pos)
3418       (beginning-of-line)
3419       (unless overlay-arrow-position
3420         (setq overlay-arrow-position (make-marker)))
3421       (setq overlay-arrow-string "=>"
3422             overlay-arrow-position (set-marker overlay-arrow-position
3423                                                (point)
3424                                                (current-buffer))))))
3425
3426 (defun gnus-summary-setup-buffer (group)
3427   "Initialize summary buffer."
3428   (let ((buffer (gnus-summary-buffer-name group))
3429         (dead-name (concat "*Dead Summary "
3430                            (gnus-group-decoded-name group) "*")))
3431     ;; If a dead summary buffer exists, we kill it.
3432     (when (gnus-buffer-live-p dead-name)
3433       (gnus-kill-buffer dead-name))
3434     (if (get-buffer buffer)
3435         (progn
3436           (set-buffer buffer)
3437           (setq gnus-summary-buffer (current-buffer))
3438           (not gnus-newsgroup-prepared))
3439       ;; Fix by Sudish Joseph <joseph@cis.ohio-state.edu>
3440       (setq gnus-summary-buffer (set-buffer (gnus-get-buffer-create buffer)))
3441       (gnus-summary-mode group)
3442       (when gnus-carpal
3443         (gnus-carpal-setup-buffer 'summary))
3444       (when (gnus-group-quit-config group)
3445         (set (make-local-variable 'gnus-single-article-buffer) nil))
3446       (make-local-variable 'gnus-article-buffer)
3447       (make-local-variable 'gnus-article-current)
3448       (make-local-variable 'gnus-original-article-buffer)
3449       (setq gnus-newsgroup-name group)
3450       ;; Set any local variables in the group parameters.
3451       (gnus-summary-set-local-parameters gnus-newsgroup-name)
3452       t)))
3453
3454 (defun gnus-set-global-variables ()
3455   "Set the global equivalents of the buffer-local variables.
3456 They are set to the latest values they had.  These reflect the summary
3457 buffer that was in action when the last article was fetched."
3458   (when (eq major-mode 'gnus-summary-mode)
3459     (setq gnus-summary-buffer (current-buffer))
3460     (let ((name gnus-newsgroup-name)
3461           (marked gnus-newsgroup-marked)
3462           (spam gnus-newsgroup-spam-marked)
3463           (unread gnus-newsgroup-unreads)
3464           (headers gnus-current-headers)
3465           (data gnus-newsgroup-data)
3466           (summary gnus-summary-buffer)
3467           (article-buffer gnus-article-buffer)
3468           (original gnus-original-article-buffer)
3469           (gac gnus-article-current)
3470           (reffed gnus-reffed-article-number)
3471           (score-file gnus-current-score-file)
3472           (default-charset gnus-newsgroup-charset)
3473           vlist)
3474       (let ((locals gnus-newsgroup-variables))
3475         (while locals
3476           (if (consp (car locals))
3477               (push (eval (caar locals)) vlist)
3478             (push (eval (car locals)) vlist))
3479           (setq locals (cdr locals)))
3480         (setq vlist (nreverse vlist)))
3481       (with-current-buffer gnus-group-buffer
3482         (setq gnus-newsgroup-name name
3483               gnus-newsgroup-marked marked
3484               gnus-newsgroup-spam-marked spam
3485               gnus-newsgroup-unreads unread
3486               gnus-current-headers headers
3487               gnus-newsgroup-data data
3488               gnus-article-current gac
3489               gnus-summary-buffer summary
3490               gnus-article-buffer article-buffer
3491               gnus-original-article-buffer original
3492               gnus-reffed-article-number reffed
3493               gnus-current-score-file score-file
3494               gnus-newsgroup-charset default-charset)
3495         (let ((locals gnus-newsgroup-variables))
3496           (while locals
3497             (if (consp (car locals))
3498                 (set (caar locals) (pop vlist))
3499               (set (car locals) (pop vlist)))
3500             (setq locals (cdr locals))))
3501         ;; The article buffer also has local variables.
3502         (when (gnus-buffer-live-p gnus-article-buffer)
3503           (set-buffer gnus-article-buffer)
3504           (setq gnus-summary-buffer summary))))))
3505
3506 (defun gnus-summary-article-unread-p (article)
3507   "Say whether ARTICLE is unread or not."
3508   (memq article gnus-newsgroup-unreads))
3509
3510 (defun gnus-summary-first-article-p (&optional article)
3511   "Return whether ARTICLE is the first article in the buffer."
3512   (if (not (setq article (or article (gnus-summary-article-number))))
3513       nil
3514     (eq article (caar gnus-newsgroup-data))))
3515
3516 (defun gnus-summary-last-article-p (&optional article)
3517   "Return whether ARTICLE is the last article in the buffer."
3518   (if (not (setq article (or article (gnus-summary-article-number))))
3519       ;; All non-existent numbers are the last article.  :-)
3520       t
3521     (not (cdr (gnus-data-find-list article)))))
3522
3523 (defun gnus-make-thread-indent-array (&optional n)
3524   (when (or n
3525             (progn (setq n 200) nil)
3526             (null gnus-thread-indent-array)
3527             (/= gnus-thread-indent-level gnus-thread-indent-array-level))
3528     (setq gnus-thread-indent-array (make-vector (1+ n) "")
3529           gnus-thread-indent-array-level gnus-thread-indent-level)
3530     (while (>= n 0)
3531       (aset gnus-thread-indent-array n
3532             (make-string (* n gnus-thread-indent-level) ? ))
3533       (setq n (1- n)))))
3534
3535 (defun gnus-update-summary-mark-positions ()
3536   "Compute where the summary marks are to go."
3537   (save-excursion
3538     (when (gnus-buffer-exists-p gnus-summary-buffer)
3539       (set-buffer gnus-summary-buffer))
3540     (let ((spec gnus-summary-line-format-spec)
3541           pos)
3542       (save-excursion
3543         (gnus-set-work-buffer)
3544         (let ((gnus-tmp-unread ?Z)
3545               (gnus-replied-mark ?Z)
3546               (gnus-score-below-mark ?Z)
3547               (gnus-score-over-mark ?Z)
3548               (gnus-undownloaded-mark ?Z)
3549               (gnus-summary-line-format-spec spec)
3550               (gnus-newsgroup-downloadable '(0))
3551               (header [0 "" "" "05 Apr 2001 23:33:09 +0400" "" "" 0 0 "" nil])
3552               case-fold-search ignores)
3553           ;; Here, all marks are bound to Z.
3554           (gnus-summary-insert-line header
3555                                     0 nil t gnus-tmp-unread t nil "" nil 1)
3556           (goto-char (point-min))
3557           ;; Memorize the positions of the same characters as dummy marks.
3558           (while (re-search-forward "[A-D]" nil t)
3559             (push (point) ignores))
3560           (erase-buffer)
3561           ;; We use A-D as dummy marks in order to know column positions
3562           ;; where marks should be inserted.
3563           (setq gnus-tmp-unread ?A
3564                 gnus-replied-mark ?B
3565                 gnus-score-below-mark ?C
3566                 gnus-score-over-mark ?C
3567                 gnus-undownloaded-mark ?D)
3568           (gnus-summary-insert-line header
3569                                     0 nil t gnus-tmp-unread t nil "" nil 1)
3570           ;; Ignore characters which aren't dummy marks.
3571           (dolist (p ignores)
3572             (delete-region (goto-char (1- p)) p)
3573             (insert ?Z))
3574           (goto-char (point-min))
3575           (setq pos (list (cons 'unread
3576                                 (and (search-forward "A" nil t)
3577                                      (- (point) (point-min) 1)))))
3578           (goto-char (point-min))
3579           (push (cons 'replied (and (search-forward "B" nil t)
3580                                     (- (point) (point-min) 1)))
3581                 pos)
3582           (goto-char (point-min))
3583           (push (cons 'score (and (search-forward "C" nil t)
3584                                   (- (point) (point-min) 1)))
3585                 pos)
3586           (goto-char (point-min))
3587           (push (cons 'download (and (search-forward "D" nil t)
3588                                      (- (point) (point-min) 1)))
3589                 pos)))
3590       (setq gnus-summary-mark-positions pos))))
3591
3592 (defun gnus-summary-insert-dummy-line (gnus-tmp-subject gnus-tmp-number)
3593   "Insert a dummy root in the summary buffer."
3594   (beginning-of-line)
3595   (gnus-add-text-properties
3596    (point) (progn (eval gnus-summary-dummy-line-format-spec) (point))
3597    (list 'gnus-number gnus-tmp-number 'gnus-intangible gnus-tmp-number)))
3598
3599 (defun gnus-summary-extract-address-component (from)
3600   (or (car (funcall gnus-extract-address-components from))
3601       from))
3602
3603 (defun gnus-summary-from-or-to-or-newsgroups (header gnus-tmp-from)
3604   (let ((mail-parse-charset gnus-newsgroup-charset)
3605         (ignored-from-addresses (gnus-ignored-from-addresses))
3606         ; Is it really necessary to do this next part for each summary line?
3607         ; Luckily, doesn't seem to slow things down much.
3608         (mail-parse-ignored-charsets
3609          (with-current-buffer gnus-summary-buffer
3610            gnus-newsgroup-ignored-charsets)))
3611     (or
3612      (and ignored-from-addresses
3613           (string-match ignored-from-addresses gnus-tmp-from)
3614           (let ((extra-headers (mail-header-extra header))
3615                 to
3616                 newsgroups)
3617             (cond
3618              ((setq to (cdr (assq 'To extra-headers)))
3619               (concat gnus-summary-to-prefix
3620                       (inline
3621                         (gnus-summary-extract-address-component
3622                          (funcall gnus-decode-encoded-address-function to)))))
3623              ((setq newsgroups
3624                     (or
3625                      (cdr (assq 'Newsgroups extra-headers))
3626                      (and
3627                       (memq 'Newsgroups gnus-extra-headers)
3628                       (eq (car (gnus-find-method-for-group
3629                                 gnus-newsgroup-name)) 'nntp)
3630                       (gnus-group-real-name gnus-newsgroup-name))))
3631               (concat gnus-summary-newsgroup-prefix newsgroups)))))
3632      (inline (gnus-summary-extract-address-component gnus-tmp-from)))))
3633
3634 (defun gnus-summary-insert-line (gnus-tmp-header
3635                                  gnus-tmp-level gnus-tmp-current
3636                                  undownloaded gnus-tmp-unread gnus-tmp-replied
3637                                  gnus-tmp-expirable gnus-tmp-subject-or-nil
3638                                  &optional gnus-tmp-dummy gnus-tmp-score
3639                                  gnus-tmp-process)
3640   (if (>= gnus-tmp-level (length gnus-thread-indent-array))
3641       (gnus-make-thread-indent-array (max (* 2 (length gnus-thread-indent-array))
3642                                           gnus-tmp-level)))
3643   (let* ((gnus-tmp-indentation (aref gnus-thread-indent-array gnus-tmp-level))
3644          (gnus-tmp-lines (mail-header-lines gnus-tmp-header))
3645          (gnus-tmp-score (or gnus-tmp-score gnus-summary-default-score 0))
3646          (gnus-tmp-score-char
3647           (if (or (null gnus-summary-default-score)
3648                   (<= (abs (- gnus-tmp-score gnus-summary-default-score))
3649                       gnus-summary-zcore-fuzz))
3650               ?                         ;Whitespace
3651             (if (< gnus-tmp-score gnus-summary-default-score)
3652                 gnus-score-below-mark gnus-score-over-mark)))
3653          (gnus-tmp-number (mail-header-number gnus-tmp-header))
3654          (gnus-tmp-replied
3655           (cond (gnus-tmp-process gnus-process-mark)
3656                 ((memq gnus-tmp-current gnus-newsgroup-cached)
3657                  gnus-cached-mark)
3658                 (gnus-tmp-replied gnus-replied-mark)
3659                 ((memq gnus-tmp-current gnus-newsgroup-forwarded)
3660                  gnus-forwarded-mark)
3661                 ((memq gnus-tmp-current gnus-newsgroup-saved)
3662                  gnus-saved-mark)
3663                 ((memq gnus-tmp-number gnus-newsgroup-recent)
3664                  gnus-recent-mark)
3665                 ((memq gnus-tmp-number gnus-newsgroup-unseen)
3666                  gnus-unseen-mark)
3667                 (t gnus-no-mark)))
3668          (gnus-tmp-downloaded
3669           (cond (undownloaded
3670                  gnus-undownloaded-mark)
3671                 (gnus-newsgroup-agentized
3672                  gnus-downloaded-mark)
3673                 (t
3674                  gnus-no-mark)))
3675          (gnus-tmp-from (mail-header-from gnus-tmp-header))
3676          (gnus-tmp-name
3677           (cond
3678            ((string-match "<[^>]+> *$" gnus-tmp-from)
3679             (let ((beg (match-beginning 0)))
3680               (or (and (string-match "^\".+\"" gnus-tmp-from)
3681                        (substring gnus-tmp-from 1 (1- (match-end 0))))
3682                   (substring gnus-tmp-from 0 beg))))
3683            ((string-match "(.+)" gnus-tmp-from)
3684             (substring gnus-tmp-from
3685                        (1+ (match-beginning 0)) (1- (match-end 0))))
3686            (t gnus-tmp-from)))
3687          (gnus-tmp-subject (mail-header-subject gnus-tmp-header))
3688          (gnus-tmp-opening-bracket (if gnus-tmp-dummy ?\< ?\[))
3689          (gnus-tmp-closing-bracket (if gnus-tmp-dummy ?\> ?\]))
3690          (inhibit-read-only t))
3691     (when (string= gnus-tmp-name "")
3692       (setq gnus-tmp-name gnus-tmp-from))
3693     (unless (numberp gnus-tmp-lines)
3694       (setq gnus-tmp-lines -1))
3695     (if (= gnus-tmp-lines -1)
3696         (setq gnus-tmp-lines "?")
3697       (setq gnus-tmp-lines (number-to-string gnus-tmp-lines)))
3698       (gnus-put-text-property
3699      (point)
3700      (progn (eval gnus-summary-line-format-spec) (point))
3701        'gnus-number gnus-tmp-number)
3702     (when (gnus-visual-p 'summary-highlight 'highlight)
3703       (forward-line -1)
3704       (gnus-run-hooks 'gnus-summary-update-hook)
3705       (forward-line 1))))
3706
3707 (defun gnus-summary-update-line (&optional dont-update)
3708   "Update summary line after change."
3709   (when (and gnus-summary-default-score
3710              (not gnus-summary-inhibit-highlight))
3711     (let* ((gnus-summary-inhibit-highlight t) ; Prevent recursion.
3712            (article (gnus-summary-article-number))
3713            (score (gnus-summary-article-score article)))
3714       (unless dont-update
3715         (if (and gnus-summary-mark-below
3716                  (< (gnus-summary-article-score)
3717                     gnus-summary-mark-below))
3718             ;; This article has a low score, so we mark it as read.
3719             (when (memq article gnus-newsgroup-unreads)
3720               (gnus-summary-mark-article-as-read gnus-low-score-mark))
3721           (when (eq (gnus-summary-article-mark) gnus-low-score-mark)
3722             ;; This article was previously marked as read on account
3723             ;; of a low score, but now it has risen, so we mark it as
3724             ;; unread.
3725             (gnus-summary-mark-article-as-unread gnus-unread-mark)))
3726         (gnus-summary-update-mark
3727          (if (or (null gnus-summary-default-score)
3728                  (<= (abs (- score gnus-summary-default-score))
3729                      gnus-summary-zcore-fuzz))
3730              ?                          ;Whitespace
3731            (if (< score gnus-summary-default-score)
3732                gnus-score-below-mark gnus-score-over-mark))
3733          'score))
3734       ;; Do visual highlighting.
3735       (when (gnus-visual-p 'summary-highlight 'highlight)
3736         (gnus-run-hooks 'gnus-summary-update-hook)))))
3737
3738 (defvar gnus-tmp-new-adopts nil)
3739
3740 (defun gnus-summary-number-of-articles-in-thread (thread &optional level char)
3741   "Return the number of articles in THREAD.
3742 This may be 0 in some cases -- if none of the articles in
3743 the thread are to be displayed."
3744   (let* ((number
3745          ;; Fix by Luc Van Eycken <Luc.VanEycken@esat.kuleuven.ac.be>.
3746           (cond
3747            ((not (listp thread))
3748             1)
3749            ((and (consp thread) (cdr thread))
3750             (apply
3751              '+ 1 (mapcar
3752                    'gnus-summary-number-of-articles-in-thread (cdr thread))))
3753            ((null thread)
3754             1)
3755            ((memq (mail-header-number (car thread)) gnus-newsgroup-limit)
3756             1)
3757            (t 0))))
3758     (when (and level (zerop level) gnus-tmp-new-adopts)
3759       (incf number
3760             (apply '+ (mapcar
3761                        'gnus-summary-number-of-articles-in-thread
3762                        gnus-tmp-new-adopts))))
3763     (if char
3764         (if (> number 1) gnus-not-empty-thread-mark
3765           gnus-empty-thread-mark)
3766       number)))
3767
3768 (defsubst gnus-summary-line-message-size (head)
3769   "Return pretty-printed version of message size.
3770 This function is intended to be used in
3771 `gnus-summary-line-format-alist'."
3772   (let ((c (or (mail-header-chars head) -1)))
3773     (cond ((< c 0) "n/a")               ; chars not available
3774           ((< c (* 1000 10)) (format "%1.1fk" (/ c 1024.0)))
3775           ((< c (* 1000 100)) (format "%dk" (/ c 1024.0)))
3776           ((< c (* 1000 10000)) (format "%1.1fM" (/ c (* 1024.0 1024))))
3777           (t (format "%dM" (/ c (* 1024.0 1024)))))))
3778
3779
3780 (defun gnus-summary-set-local-parameters (group)
3781   "Go through the local params of GROUP and set all variable specs in that list."
3782   (let ((vars '(quit-config)))          ; Ignore quit-config.
3783     (dolist (elem (gnus-group-find-parameter group))
3784       (and (consp elem)                 ; Has to be a cons.
3785            (consp (cdr elem))           ; The cdr has to be a list.
3786            (symbolp (car elem))         ; Has to be a symbol in there.
3787            (not (memq (car elem) vars))
3788            (ignore-errors               ; So we set it.
3789              (push (car elem) vars)
3790              (make-local-variable (car elem))
3791              (set (car elem) (eval (nth 1 elem))))))))
3792
3793 (defun gnus-summary-read-group (group &optional show-all no-article
3794                                       kill-buffer no-display backward
3795                                       select-articles)
3796   "Start reading news in newsgroup GROUP.
3797 If SHOW-ALL is non-nil, already read articles are also listed.
3798 If NO-ARTICLE is non-nil, no article is selected initially.
3799 If NO-DISPLAY, don't generate a summary buffer."
3800   (let (result)
3801     (while (and group
3802                 (null (setq result
3803                             (let ((gnus-auto-select-next nil))
3804                               (or (gnus-summary-read-group-1
3805                                    group show-all no-article
3806                                    kill-buffer no-display
3807                                    select-articles)
3808                                   (setq show-all nil
3809                                         select-articles nil)))))
3810                 (eq gnus-auto-select-next 'quietly))
3811       (set-buffer gnus-group-buffer)
3812       ;; The entry function called above goes to the next
3813       ;; group automatically, so we go two groups back
3814       ;; if we are searching for the previous group.
3815       (when backward
3816         (gnus-group-prev-unread-group 2))
3817       (if (not (equal group (gnus-group-group-name)))
3818           (setq group (gnus-group-group-name))
3819         (setq group nil)))
3820     result))
3821
3822 (defun gnus-summary-read-group-1 (group show-all no-article
3823                                         kill-buffer no-display
3824                                         &optional select-articles)
3825   ;; Killed foreign groups can't be entered.
3826   ;;  (when (and (not (gnus-group-native-p group))
3827   ;;         (not (gnus-gethash group gnus-newsrc-hashtb)))
3828   ;;    (error "Dead non-native groups can't be entered"))
3829   (gnus-message 5 "Retrieving newsgroup: %s..."
3830                 (gnus-group-decoded-name group))
3831   (let* ((new-group (gnus-summary-setup-buffer group))
3832          (quit-config (gnus-group-quit-config group))
3833          (did-select (and new-group (gnus-select-newsgroup
3834                                      group show-all select-articles))))
3835     (cond
3836      ;; This summary buffer exists already, so we just select it.
3837      ((not new-group)
3838       (gnus-set-global-variables)
3839       (when kill-buffer
3840         (gnus-kill-or-deaden-summary kill-buffer))
3841       (gnus-configure-windows 'summary 'force)
3842       (gnus-set-mode-line 'summary)
3843       (gnus-summary-position-point)
3844       (message "")
3845       t)
3846      ;; We couldn't select this group.
3847      ((null did-select)
3848       (when (and (eq major-mode 'gnus-summary-mode)
3849                  (not (equal (current-buffer) kill-buffer)))
3850         (kill-buffer (current-buffer))
3851         (if (not quit-config)
3852             (progn
3853               ;; Update the info -- marks might need to be removed,
3854               ;; for instance.
3855               (gnus-summary-update-info)
3856               (set-buffer gnus-group-buffer)
3857               (gnus-group-jump-to-group group)
3858               (gnus-group-next-unread-group 1))
3859           (gnus-handle-ephemeral-exit quit-config)))
3860       (let ((grpinfo (gnus-get-info group)))
3861         (if (null (gnus-info-read grpinfo))
3862             (gnus-message 3 "Group %s contains no messages"
3863                           (gnus-group-decoded-name group))
3864           (gnus-message 3 "Can't select group")))
3865       nil)
3866      ;; The user did a `C-g' while prompting for number of articles,
3867      ;; so we exit this group.
3868      ((eq did-select 'quit)
3869       (and (eq major-mode 'gnus-summary-mode)
3870            (not (equal (current-buffer) kill-buffer))
3871            (kill-buffer (current-buffer)))
3872       (when kill-buffer
3873         (gnus-kill-or-deaden-summary kill-buffer))
3874       (if (not quit-config)
3875           (progn
3876             (set-buffer gnus-group-buffer)
3877             (gnus-group-jump-to-group group)
3878             (gnus-group-next-unread-group 1)
3879             (gnus-configure-windows 'group 'force))
3880         (gnus-handle-ephemeral-exit quit-config))
3881       ;; Finally signal the quit.
3882       (signal 'quit nil))
3883      ;; The group was successfully selected.
3884      (t
3885       (gnus-set-global-variables)
3886       ;; Save the active value in effect when the group was entered.
3887       (setq gnus-newsgroup-active
3888             (gnus-copy-sequence
3889              (gnus-active gnus-newsgroup-name)))
3890       ;; You can change the summary buffer in some way with this hook.
3891       (gnus-run-hooks 'gnus-select-group-hook)
3892       (when (memq 'summary (gnus-update-format-specifications
3893                             nil 'summary 'summary-mode 'summary-dummy))
3894         ;; The format specification for the summary line was updated,
3895         ;; so we need to update the mark positions as well.
3896         (gnus-update-summary-mark-positions))
3897       ;; Do score processing.
3898       (when gnus-use-scoring
3899         (gnus-possibly-score-headers))
3900       ;; Check whether to fill in the gaps in the threads.
3901       (when gnus-build-sparse-threads
3902         (gnus-build-sparse-threads))
3903       ;; Find the initial limit.
3904       (if show-all
3905           (let ((gnus-newsgroup-dormant nil))
3906             (gnus-summary-initial-limit show-all))
3907         (gnus-summary-initial-limit show-all))
3908       ;; Generate the summary buffer.
3909       (unless no-display
3910         (gnus-summary-prepare))
3911       (when gnus-use-trees
3912         (gnus-tree-open group)
3913         (setq gnus-summary-highlight-line-function
3914               'gnus-tree-highlight-article))
3915       ;; If the summary buffer is empty, but there are some low-scored
3916       ;; articles or some excluded dormants, we include these in the
3917       ;; buffer.
3918       (when (and (zerop (buffer-size))
3919                  (not no-display))
3920         (cond (gnus-newsgroup-dormant
3921                (gnus-summary-limit-include-dormant))
3922               ((and gnus-newsgroup-scored show-all)
3923                (gnus-summary-limit-include-expunged t))))
3924       ;; Function `gnus-apply-kill-file' must be called in this hook.
3925       (gnus-run-hooks 'gnus-apply-kill-hook)
3926       (if (and (zerop (buffer-size))
3927                (not no-display))
3928           (progn
3929             ;; This newsgroup is empty.
3930             (gnus-summary-catchup-and-exit nil t)
3931             (gnus-message 6 "No unread news")
3932             (when kill-buffer
3933               (gnus-kill-or-deaden-summary kill-buffer))
3934             ;; Return nil from this function.
3935             nil)
3936         ;; Hide conversation thread subtrees.  We cannot do this in
3937         ;; gnus-summary-prepare-hook since kill processing may not
3938         ;; work with hidden articles.
3939         (gnus-summary-maybe-hide-threads)
3940         (when kill-buffer
3941           (gnus-kill-or-deaden-summary kill-buffer))
3942         (gnus-summary-auto-select-subject)
3943         ;; Show first unread article if requested.
3944         (if (and (not no-article)
3945                  (not no-display)
3946                  gnus-newsgroup-unreads
3947                  gnus-auto-select-first)
3948             (progn
3949               (gnus-configure-windows 'summary)
3950               (let ((art (gnus-summary-article-number)))
3951                 (unless (and (not gnus-plugged)
3952                              (or (memq art gnus-newsgroup-undownloaded)
3953                                  (memq art gnus-newsgroup-downloadable)))
3954                   (gnus-summary-goto-article art))))
3955           ;; Don't select any articles.
3956           (gnus-summary-position-point)
3957           (gnus-configure-windows 'summary 'force)
3958           (gnus-set-mode-line 'summary))
3959         (when (and gnus-auto-center-group
3960                    (get-buffer-window gnus-group-buffer t))
3961           ;; Gotta use windows, because recenter does weird stuff if
3962           ;; the current buffer ain't the displayed window.
3963           (let ((owin (selected-window)))
3964             (select-window (get-buffer-window gnus-group-buffer t))
3965             (when (gnus-group-goto-group group)
3966               (recenter))
3967             (select-window owin)))
3968         ;; Mark this buffer as "prepared".
3969         (setq gnus-newsgroup-prepared t)
3970         (gnus-run-hooks 'gnus-summary-prepared-hook)
3971         (unless (gnus-ephemeral-group-p group)
3972           (gnus-group-update-group group))
3973         t)))))
3974
3975 (defun gnus-summary-auto-select-subject ()
3976   "Select the subject line on initial group entry."
3977   (goto-char (point-min))
3978   (cond
3979    ((eq gnus-auto-select-subject 'best)
3980     (gnus-summary-best-unread-subject))
3981    ((eq gnus-auto-select-subject 'unread)
3982     (gnus-summary-first-unread-subject))
3983    ((eq gnus-auto-select-subject 'unseen)
3984     (gnus-summary-first-unseen-subject))
3985    ((eq gnus-auto-select-subject 'unseen-or-unread)
3986     (gnus-summary-first-unseen-or-unread-subject))
3987    ((eq gnus-auto-select-subject 'first)
3988     ;; Do nothing.
3989     )
3990    ((functionp gnus-auto-select-subject)
3991     (funcall gnus-auto-select-subject))))
3992
3993 (defun gnus-summary-prepare ()
3994   "Generate the summary buffer."
3995   (interactive)
3996   (let ((inhibit-read-only t))
3997     (erase-buffer)
3998     (setq gnus-newsgroup-data nil
3999           gnus-newsgroup-data-reverse nil)
4000     (gnus-run-hooks 'gnus-summary-generate-hook)
4001     ;; Generate the buffer, either with threads or without.
4002     (when gnus-newsgroup-headers
4003       (gnus-summary-prepare-threads
4004        (if gnus-show-threads
4005            (gnus-sort-gathered-threads
4006             (funcall gnus-summary-thread-gathering-function
4007                      (gnus-sort-threads
4008                       (gnus-cut-threads (gnus-make-threads)))))
4009          ;; Unthreaded display.
4010          (gnus-sort-articles gnus-newsgroup-headers))))
4011     (setq gnus-newsgroup-data (nreverse gnus-newsgroup-data))
4012     ;; Call hooks for modifying summary buffer.
4013     (goto-char (point-min))
4014     (gnus-run-hooks 'gnus-summary-prepare-hook)))
4015
4016 (defsubst gnus-general-simplify-subject (subject)
4017   "Simplify subject by the same rules as `gnus-gather-threads-by-subject'."
4018   (setq subject
4019         (cond
4020          ;; Truncate the subject.
4021          (gnus-simplify-subject-functions
4022           (gnus-map-function gnus-simplify-subject-functions subject))
4023          ((numberp gnus-summary-gather-subject-limit)
4024           (setq subject (gnus-simplify-subject-re subject))
4025           (if (> (length subject) gnus-summary-gather-subject-limit)
4026               (substring subject 0 gnus-summary-gather-subject-limit)
4027             subject))
4028          ;; Fuzzily simplify it.
4029          ((eq 'fuzzy gnus-summary-gather-subject-limit)
4030           (gnus-simplify-subject-fuzzy subject))
4031          ;; Just remove the leading "Re:".
4032          (t
4033           (gnus-simplify-subject-re subject))))
4034
4035   (if (and gnus-summary-gather-exclude-subject
4036            (string-match gnus-summary-gather-exclude-subject subject))
4037       nil                         ; This article shouldn't be gathered
4038     subject))
4039
4040 (defun gnus-summary-simplify-subject-query ()
4041   "Query where the respool algorithm would put this article."
4042   (interactive)
4043   (gnus-summary-select-article)
4044   (message "%s" (gnus-general-simplify-subject (gnus-summary-article-subject))))
4045
4046 (defun gnus-gather-threads-by-subject (threads)
4047   "Gather threads by looking at Subject headers."
4048   (if (not gnus-summary-make-false-root)
4049       threads
4050     (let ((hashtb (gnus-make-hashtable 1024))
4051           (prev threads)
4052           (result threads)
4053           subject hthread whole-subject)
4054       (while threads
4055         (setq subject (gnus-general-simplify-subject
4056                        (setq whole-subject (mail-header-subject
4057                                             (caar threads)))))
4058         (when subject
4059           (if (setq hthread (gnus-gethash subject hashtb))
4060               (progn
4061                 ;; We enter a dummy root into the thread, if we
4062                 ;; haven't done that already.
4063                 (unless (stringp (caar hthread))
4064                   (setcar hthread (list whole-subject (car hthread))))
4065                 ;; We add this new gathered thread to this gathered
4066                 ;; thread.
4067                 (setcdr (car hthread)
4068                         (nconc (cdar hthread) (list (car threads))))
4069                 ;; Remove it from the list of threads.
4070                 (setcdr prev (cdr threads))
4071                 (setq threads prev))
4072             ;; Enter this thread into the hash table.
4073             (gnus-sethash subject
4074                           (if gnus-summary-make-false-root-always
4075                               (progn
4076                                 ;; If you want a dummy root above all
4077                                 ;; threads...
4078                                 (setcar threads (list whole-subject
4079                                                       (car threads)))
4080                                 threads)
4081                             threads)
4082                           hashtb)))
4083         (setq prev threads)
4084         (setq threads (cdr threads)))
4085       result)))
4086
4087 (defun gnus-gather-threads-by-references (threads)
4088   "Gather threads by looking at References headers."
4089   (let ((idhashtb (gnus-make-hashtable 1024))
4090         (thhashtb (gnus-make-hashtable 1024))
4091         (prev threads)
4092         (result threads)
4093         ids references id gthread gid entered ref)
4094     (while threads
4095       (when (setq references (mail-header-references (caar threads)))
4096         (setq id (mail-header-id (caar threads))
4097               ids (inline (gnus-split-references references))
4098               entered nil)
4099         (while (setq ref (pop ids))
4100           (setq ids (delete ref ids))
4101           (if (not (setq gid (gnus-gethash ref idhashtb)))
4102               (progn
4103                 (gnus-sethash ref id idhashtb)
4104                 (gnus-sethash id threads thhashtb))
4105             (setq gthread (gnus-gethash gid thhashtb))
4106             (unless entered
4107               ;; We enter a dummy root into the thread, if we
4108               ;; haven't done that already.
4109               (unless (stringp (caar gthread))
4110                 (setcar gthread (list (mail-header-subject (caar gthread))
4111                                       (car gthread))))
4112               ;; We add this new gathered thread to this gathered
4113               ;; thread.
4114               (setcdr (car gthread)
4115                       (nconc (cdar gthread) (list (car threads)))))
4116             ;; Add it into the thread hash table.
4117             (gnus-sethash id gthread thhashtb)
4118             (setq entered t)
4119             ;; Remove it from the list of threads.
4120             (setcdr prev (cdr threads))
4121             (setq threads prev))))
4122       (setq prev threads)
4123       (setq threads (cdr threads)))
4124     result))
4125
4126 (defun gnus-sort-gathered-threads (threads)
4127   "Sort subtreads inside each gathered thread by `gnus-sort-gathered-threads-function'."
4128   (let ((result threads))
4129     (while threads
4130       (when (stringp (caar threads))
4131         (setcdr (car threads)
4132                 (sort (cdar threads) gnus-sort-gathered-threads-function)))
4133       (setq threads (cdr threads)))
4134     result))
4135
4136 (defun gnus-thread-loop-p (root thread)
4137   "Say whether ROOT is in THREAD."
4138   (let ((stack (list thread))
4139         (infloop 0)
4140         th)
4141     (while (setq thread (pop stack))
4142       (setq th (cdr thread))
4143       (while (and th
4144                   (not (eq (caar th) root)))
4145         (pop th))
4146       (if th
4147           ;; We have found a loop.
4148           (let (ref-dep)
4149             (setcdr thread (delq (car th) (cdr thread)))
4150             (if (boundp (setq ref-dep (intern "none"
4151                                               gnus-newsgroup-dependencies)))
4152                 (setcdr (symbol-value ref-dep)
4153                         (nconc (cdr (symbol-value ref-dep))
4154                                (list (car th))))
4155               (set ref-dep (list nil (car th))))
4156             (setq infloop 1
4157                   stack nil))
4158         ;; Push all the subthreads onto the stack.
4159         (push (cdr thread) stack)))
4160     infloop))
4161
4162 (defun gnus-make-threads ()
4163   "Go through the dependency hashtb and find the roots.  Return all threads."
4164   (let (threads)
4165     (while (catch 'infloop
4166              (mapatoms
4167               (lambda (refs)
4168                 ;; Deal with self-referencing References loops.
4169                 (when (and (car (symbol-value refs))
4170                            (not (zerop
4171                                  (apply
4172                                   '+
4173                                   (mapcar
4174                                    (lambda (thread)
4175                                      (gnus-thread-loop-p
4176                                       (car (symbol-value refs)) thread))
4177                                    (cdr (symbol-value refs)))))))
4178                   (setq threads nil)
4179                   (throw 'infloop t))
4180                 (unless (car (symbol-value refs))
4181                   ;; These threads do not refer back to any other
4182                   ;; articles, so they're roots.
4183                   (setq threads (append (cdr (symbol-value refs)) threads))))
4184               gnus-newsgroup-dependencies)))
4185     threads))
4186
4187 ;; Build the thread tree.
4188 (defsubst gnus-dependencies-add-header (header dependencies force-new)
4189   "Enter HEADER into the DEPENDENCIES table if it is not already there.
4190
4191 If FORCE-NEW is not nil, enter HEADER into the DEPENDENCIES table even
4192 if it was already present.
4193
4194 If `gnus-summary-ignore-duplicates' is nil then duplicate Message-IDs
4195 will not be entered in the DEPENDENCIES table.  Otherwise duplicate
4196 Message-IDs will be renamed to a unique Message-ID before being
4197 entered.
4198
4199 Returns HEADER if it was entered in the DEPENDENCIES.  Returns nil otherwise."
4200   (let* ((id (mail-header-id header))
4201          (id-dep (and id (intern id dependencies)))
4202          parent-id ref ref-dep ref-header replaced)
4203     ;; Enter this `header' in the `dependencies' table.
4204     (cond
4205      ((not id-dep)
4206       (setq header nil))
4207      ;; The first two cases do the normal part: enter a new `header'
4208      ;; in the `dependencies' table.
4209      ((not (boundp id-dep))
4210       (set id-dep (list header)))
4211      ((null (car (symbol-value id-dep)))
4212       (setcar (symbol-value id-dep) header))
4213
4214      ;; From here the `header' was already present in the
4215      ;; `dependencies' table.
4216      (force-new
4217       ;; Overrides an existing entry;
4218       ;; just set the header part of the entry.
4219       (setcar (symbol-value id-dep) header)
4220       (setq replaced t))
4221
4222      ;; Renames the existing `header' to a unique Message-ID.
4223      ((not gnus-summary-ignore-duplicates)
4224       ;; An article with this Message-ID has already been seen.
4225       ;; We rename the Message-ID.
4226       (set (setq id-dep (intern (setq id (nnmail-message-id)) dependencies))
4227            (list header))
4228       (mail-header-set-id header id))
4229
4230      ;; The last case ignores an existing entry, except it adds any
4231      ;; additional Xrefs (in case the two articles came from different
4232      ;; servers.
4233      ;; Also sets `header' to `nil' meaning that the `dependencies'
4234      ;; table was *not* modified.
4235      (t
4236       (mail-header-set-xref
4237        (car (symbol-value id-dep))
4238        (concat (or (mail-header-xref (car (symbol-value id-dep)))
4239                    "")
4240                (or (mail-header-xref header) "")))
4241       (setq header nil)))
4242
4243     (when (and header (not replaced))
4244       ;; First check that we are not creating a References loop.
4245       (setq parent-id (gnus-parent-id (mail-header-references header)))
4246       (setq ref parent-id)
4247       (while (and ref
4248                   (setq ref-dep (intern-soft ref dependencies))
4249                   (boundp ref-dep)
4250                   (setq ref-header (car (symbol-value ref-dep))))
4251         (if (string= id ref)
4252             ;; Yuk!  This is a reference loop.  Make the article be a
4253             ;; root article.
4254             (progn
4255               (mail-header-set-references (car (symbol-value id-dep)) "none")
4256               (setq ref nil)
4257               (setq parent-id nil))
4258           (setq ref (gnus-parent-id (mail-header-references ref-header)))))
4259       (setq ref-dep (intern (or parent-id "none") dependencies))
4260       (if (boundp ref-dep)
4261           (setcdr (symbol-value ref-dep)
4262                   (nconc (cdr (symbol-value ref-dep))
4263                          (list (symbol-value id-dep))))
4264         (set ref-dep (list nil (symbol-value id-dep)))))
4265     header))
4266
4267 (defun gnus-extract-message-id-from-in-reply-to (string)
4268   (if (string-match "<[^>]+>" string)
4269       (substring string (match-beginning 0) (match-end 0))
4270     nil))
4271
4272 (defun gnus-build-sparse-threads ()
4273   (let ((headers gnus-newsgroup-headers)
4274         (mail-parse-charset gnus-newsgroup-charset)
4275         (gnus-summary-ignore-duplicates t)
4276         header references generation relations
4277         subject child end new-child date)
4278     ;; First we create an alist of generations/relations, where
4279     ;; generations is how much we trust the relation, and the relation
4280     ;; is parent/child.
4281     (gnus-message 7 "Making sparse threads...")
4282     (save-excursion
4283       (nnheader-set-temp-buffer " *gnus sparse threads*")
4284       (while (setq header (pop headers))
4285         (when (and (setq references (mail-header-references header))
4286                    (not (string= references "")))
4287           (insert references)
4288           (setq child (mail-header-id header)
4289                 subject (mail-header-subject header)
4290                 date (mail-header-date header)
4291                 generation 0)
4292           (while (search-backward ">" nil t)
4293             (setq end (1+ (point)))
4294             (when (search-backward "<" nil t)
4295               (setq new-child (buffer-substring (point) end))
4296               (push (list (incf generation)
4297                           child (setq child new-child)
4298                           subject date)
4299                     relations)))
4300           (when child
4301             (push (list (1+ generation) child nil subject) relations))
4302           (erase-buffer)))
4303       (kill-buffer (current-buffer)))
4304     ;; Sort over trustworthiness.
4305     (dolist (relation (sort relations 'car-less-than-car))
4306       (when (gnus-dependencies-add-header
4307              (make-full-mail-header
4308               gnus-reffed-article-number
4309               (nth 3 relation) "" (or (nth 4 relation) "")
4310               (nth 1 relation)
4311               (or (nth 2 relation) "") 0 0 "")
4312              gnus-newsgroup-dependencies nil)
4313         (push gnus-reffed-article-number gnus-newsgroup-limit)
4314         (push gnus-reffed-article-number gnus-newsgroup-sparse)
4315         (push (cons gnus-reffed-article-number gnus-sparse-mark)
4316               gnus-newsgroup-reads)
4317         (decf gnus-reffed-article-number)))
4318     (gnus-message 7 "Making sparse threads...done")))
4319
4320 (defun gnus-build-old-threads ()
4321   ;; Look at all the articles that refer back to old articles, and
4322   ;; fetch the headers for the articles that aren't there.  This will
4323   ;; build complete threads - if the roots haven't been expired by the
4324   ;; server, that is.
4325   (let ((mail-parse-charset gnus-newsgroup-charset)
4326         id heads)
4327     (mapatoms
4328      (lambda (refs)
4329        (when (not (car (symbol-value refs)))
4330          (setq heads (cdr (symbol-value refs)))
4331          (while heads
4332            (if (memq (mail-header-number (caar heads))
4333                      gnus-newsgroup-dormant)
4334                (setq heads (cdr heads))
4335              (setq id (symbol-name refs))
4336              (while (and (setq id (gnus-build-get-header id))
4337                          (not (car (gnus-id-to-thread id)))))
4338              (setq heads nil)))))
4339      gnus-newsgroup-dependencies)))
4340
4341 (defsubst gnus-remove-odd-characters (string)
4342   "Translate STRING into something that doesn't contain weird characters."
4343   (mm-subst-char-in-string
4344    ?\r ?\-
4345    (mm-subst-char-in-string ?\n ?\- string t) t))
4346
4347 ;; This function has to be called with point after the article number
4348 ;; on the beginning of the line.
4349 (defsubst gnus-nov-parse-line (number dependencies &optional force-new)
4350   (let ((eol (point-at-eol))
4351         (buffer (current-buffer))
4352         header references in-reply-to)
4353
4354     ;; overview: [num subject from date id refs chars lines misc]
4355     (unwind-protect
4356         (let (x)
4357           (narrow-to-region (point) eol)
4358           (unless (eobp)
4359             (forward-char))
4360
4361           (setq header
4362                 (make-full-mail-header
4363                  number                 ; number
4364                  (condition-case ()     ; subject
4365                      (gnus-remove-odd-characters
4366                       (funcall gnus-decode-encoded-word-function
4367                                (setq x (nnheader-nov-field))))
4368                    (error x))
4369                  (condition-case ()     ; from
4370                      (gnus-remove-odd-characters
4371                       (funcall gnus-decode-encoded-address-function
4372                                (setq x (nnheader-nov-field))))
4373                    (error x))
4374                  (nnheader-nov-field)   ; date
4375                  (nnheader-nov-read-message-id number)  ; id
4376                  (setq references (nnheader-nov-field)) ; refs
4377                  (nnheader-nov-read-integer) ; chars
4378                  (nnheader-nov-read-integer) ; lines
4379                  (unless (eobp)
4380                    (if (looking-at "Xref: ")
4381                        (goto-char (match-end 0)))
4382                    (nnheader-nov-field)) ; Xref
4383                  (nnheader-nov-parse-extra)))) ; extra
4384
4385       (widen))
4386
4387     (when (and (string= references "")
4388                (setq in-reply-to (mail-header-extra header))
4389                (setq in-reply-to (cdr (assq 'In-Reply-To in-reply-to))))
4390       (mail-header-set-references
4391        header (gnus-extract-message-id-from-in-reply-to in-reply-to)))
4392
4393     (when gnus-alter-header-function
4394       (funcall gnus-alter-header-function header))
4395     (gnus-dependencies-add-header header dependencies force-new)))
4396
4397 (defun gnus-build-get-header (id)
4398   "Look through the buffer of NOV lines and find the header to ID.
4399 Enter this line into the dependencies hash table, and return
4400 the id of the parent article (if any)."
4401   (let ((deps gnus-newsgroup-dependencies)
4402         found header)
4403     (prog1
4404         (with-current-buffer nntp-server-buffer
4405           (let ((case-fold-search nil))
4406             (goto-char (point-min))
4407             (while (and (not found)
4408                         (search-forward id nil t))
4409               (beginning-of-line)
4410               (setq found (looking-at
4411                            (format "^[^\t]*\t[^\t]*\t[^\t]*\t[^\t]*\t%s"
4412                                    (regexp-quote id))))
4413               (or found (beginning-of-line 2)))
4414             (when found
4415               (beginning-of-line)
4416               (and
4417                (setq header (gnus-nov-parse-line
4418                              (read (current-buffer)) deps))
4419                (gnus-parent-id (mail-header-references header))))))
4420       (when header
4421         (let ((number (mail-header-number header)))
4422           (push number gnus-newsgroup-limit)
4423           (push header gnus-newsgroup-headers)
4424           (if (memq number gnus-newsgroup-unselected)
4425               (progn
4426                 (setq gnus-newsgroup-unreads
4427                       (gnus-add-to-sorted-list gnus-newsgroup-unreads
4428                                                number))
4429                 (setq gnus-newsgroup-unselected
4430                       (delq number gnus-newsgroup-unselected)))
4431             (push number gnus-newsgroup-ancient)))))))
4432
4433 (defun gnus-build-all-threads ()
4434   "Read all the headers."
4435   (let ((gnus-summary-ignore-duplicates t)
4436         (mail-parse-charset gnus-newsgroup-charset)
4437         (dependencies gnus-newsgroup-dependencies)
4438         header article)
4439     (with-current-buffer nntp-server-buffer
4440       (let ((case-fold-search nil))
4441         (goto-char (point-min))
4442         (while (not (eobp))
4443           (ignore-errors
4444             (setq article (read (current-buffer))
4445                   header (gnus-nov-parse-line article dependencies)))
4446           (when header
4447             (with-current-buffer gnus-summary-buffer
4448               (push header gnus-newsgroup-headers)
4449               (if (memq (setq article (mail-header-number header))
4450                         gnus-newsgroup-unselected)
4451                   (progn
4452                     (setq gnus-newsgroup-unreads
4453                           (gnus-add-to-sorted-list
4454                            gnus-newsgroup-unreads article))
4455                     (setq gnus-newsgroup-unselected
4456                           (delq article gnus-newsgroup-unselected)))
4457                 (push article gnus-newsgroup-ancient)))
4458             (forward-line 1)))))))
4459
4460 (defun gnus-summary-update-article-line (article header)
4461   "Update the line for ARTICLE using HEADER."
4462   (let* ((id (mail-header-id header))
4463          (thread (gnus-id-to-thread id)))
4464     (unless thread
4465       (error "Article in no thread"))
4466     ;; Update the thread.
4467     (setcar thread header)
4468     (gnus-summary-goto-subject article)
4469     (let* ((datal (gnus-data-find-list article))
4470            (data (car datal))
4471            (inhibit-read-only t)
4472            (level (gnus-summary-thread-level)))
4473       (gnus-delete-line)
4474       (let ((inserted (- (point)
4475                          (progn
4476                            (gnus-summary-insert-line
4477                             header level nil
4478                             (memq article gnus-newsgroup-undownloaded)
4479                             (gnus-article-mark article)
4480                             (memq article gnus-newsgroup-replied)
4481                             (memq article gnus-newsgroup-expirable)
4482                             ;; Only insert the Subject string when it's different
4483                             ;; from the previous Subject string.
4484                             (if (and
4485                                  gnus-show-threads
4486                                  (gnus-subject-equal
4487                                   (condition-case ()
4488                                       (mail-header-subject
4489                                        (gnus-data-header
4490                                         (cadr
4491                                          (gnus-data-find-list
4492                                           article
4493                                           (gnus-data-list t)))))
4494                                     ;; Error on the side of excessive subjects.
4495                                     (error ""))
4496                                   (mail-header-subject header)))
4497                                 ""
4498                               (mail-header-subject header))
4499                             nil (cdr (assq article gnus-newsgroup-scored))
4500                             (memq article gnus-newsgroup-processable))
4501                            (point)))))
4502         (when (cdr datal)
4503           (gnus-data-update-list
4504            (cdr datal)
4505            (- (gnus-data-pos data) (gnus-data-pos (cadr datal)) inserted)))))))
4506
4507 (defun gnus-summary-update-article (article &optional iheader)
4508   "Update ARTICLE in the summary buffer."
4509   (set-buffer gnus-summary-buffer)
4510   (let* ((header (gnus-summary-article-header article))
4511          (id (mail-header-id header))
4512          (data (gnus-data-find article))
4513          (thread (gnus-id-to-thread id))
4514          (references (mail-header-references header))
4515          (parent
4516           (gnus-id-to-thread
4517            (or (gnus-parent-id
4518                 (when (and references
4519                            (not (equal "" references)))
4520                   references))
4521                "none")))
4522          (inhibit-read-only t)
4523          (old (car thread)))
4524     (when thread
4525       (unless iheader
4526         (setcar thread nil)
4527         (when parent
4528           (delq thread parent)))
4529       (if (gnus-summary-insert-subject id header)
4530           ;; Set the (possibly) new article number in the data structure.
4531           (gnus-data-set-number data (gnus-id-to-article id))
4532         (setcar thread old)
4533         nil))))
4534
4535 (defun gnus-rebuild-thread (id &optional line)
4536   "Rebuild the thread containing ID.
4537 If LINE, insert the rebuilt thread starting on line LINE."
4538   (let ((inhibit-read-only t)
4539         old-pos current thread data)
4540     (if (not gnus-show-threads)
4541         (setq thread (list (car (gnus-id-to-thread id))))
4542       ;; Get the thread this article is part of.
4543       (setq thread (gnus-remove-thread id)))
4544     (setq old-pos (point-at-bol))
4545     (setq current (save-excursion
4546                     (and (re-search-backward "[\r\n]" nil t)
4547                          (gnus-summary-article-number))))
4548     ;; If this is a gathered thread, we have to go some re-gathering.
4549     (when (stringp (car thread))
4550       (let ((subject (car thread))
4551             roots thr)
4552         (setq thread (cdr thread))
4553         (while thread
4554           (unless (memq (setq thr (gnus-id-to-thread
4555                                    (gnus-root-id
4556                                     (mail-header-id (caar thread)))))
4557                         roots)
4558             (push thr roots))
4559           (setq thread (cdr thread)))
4560         ;; We now have all (unique) roots.
4561         (if (= (length roots) 1)
4562             ;; All the loose roots are now one solid root.
4563             (setq thread (car roots))
4564           (setq thread (cons subject (gnus-sort-threads roots))))))
4565     (let (threads)
4566       ;; We then insert this thread into the summary buffer.
4567       (when line
4568         (goto-char (point-min))
4569         (forward-line (1- line)))
4570       (let (gnus-newsgroup-data gnus-newsgroup-threads)
4571         (if gnus-show-threads
4572             (gnus-summary-prepare-threads (gnus-cut-threads (list thread)))
4573           (gnus-summary-prepare-unthreaded thread))
4574         (setq data (nreverse gnus-newsgroup-data))
4575         (setq threads gnus-newsgroup-threads))
4576       ;; We splice the new data into the data structure.
4577       ;;!!! This is kinda bogus.  We assume that in LINE is non-nil,
4578       ;;!!! then we want to insert at the beginning of the buffer.
4579       ;;!!! That happens to be true with Gnus now, but that may
4580       ;;!!! change in the future.  Perhaps.
4581       (gnus-data-enter-list
4582        (if line nil current) data (- (point) old-pos))
4583       (setq gnus-newsgroup-threads
4584             (nconc threads gnus-newsgroup-threads))
4585       (gnus-data-compute-positions))))
4586
4587 (defun gnus-number-to-header (number)
4588   "Return the header for article NUMBER."
4589   (let ((headers gnus-newsgroup-headers))
4590     (while (and headers
4591                 (not (= number (mail-header-number (car headers)))))
4592       (pop headers))
4593     (when headers
4594       (car headers))))
4595
4596 (defun gnus-parent-headers (in-headers &optional generation)
4597   "Return the headers of the GENERATIONeth parent of HEADERS."
4598   (unless generation
4599     (setq generation 1))
4600   (let ((parent t)
4601         (headers in-headers)
4602         references)
4603     (while (and parent
4604                 (not (zerop generation))
4605                 (setq references (mail-header-references headers)))
4606       (setq headers (if (and references
4607                              (setq parent (gnus-parent-id references)))
4608                         (car (gnus-id-to-thread parent))
4609                       nil))
4610       (decf generation))
4611     (and (not (eq headers in-headers))
4612          headers)))
4613
4614 (defun gnus-id-to-thread (id)
4615   "Return the (sub-)thread where ID appears."
4616   (gnus-gethash id gnus-newsgroup-dependencies))
4617
4618 (defun gnus-id-to-article (id)
4619   "Return the article number of ID."
4620   (let ((thread (gnus-id-to-thread id)))
4621     (when (and thread
4622                (car thread))
4623       (mail-header-number (car thread)))))
4624
4625 (defun gnus-id-to-header (id)
4626   "Return the article headers of ID."
4627   (car (gnus-id-to-thread id)))
4628
4629 (defun gnus-article-displayed-root-p (article)
4630   "Say whether ARTICLE is a root(ish) article."
4631   (let ((level (gnus-summary-thread-level article))
4632         (refs (mail-header-references  (gnus-summary-article-header article)))
4633         particle)
4634     (cond
4635      ((null level) nil)
4636      ((zerop level) t)
4637      ((null refs) t)
4638      ((null (gnus-parent-id refs)) t)
4639      ((and (= 1 level)
4640            (null (setq particle (gnus-id-to-article
4641                                  (gnus-parent-id refs))))
4642            (null (gnus-summary-thread-level particle)))))))
4643
4644 (defun gnus-root-id (id)
4645   "Return the id of the root of the thread where ID appears."
4646   (let (last-id prev)
4647     (while (and id (setq prev (car (gnus-id-to-thread id))))
4648       (setq last-id id
4649             id (gnus-parent-id (mail-header-references prev))))
4650     last-id))
4651
4652 (defun gnus-articles-in-thread (thread)
4653   "Return the list of articles in THREAD."
4654   (cons (mail-header-number (car thread))
4655         (apply 'nconc (mapcar 'gnus-articles-in-thread (cdr thread)))))
4656
4657 (defun gnus-remove-thread (id &optional dont-remove)
4658   "Remove the thread that has ID in it."
4659   (let (headers thread last-id)
4660     ;; First go up in this thread until we find the root.
4661     (setq last-id (gnus-root-id id)
4662           headers (message-flatten-list (gnus-id-to-thread last-id)))
4663     ;; We have now found the real root of this thread.  It might have
4664     ;; been gathered into some loose thread, so we have to search
4665     ;; through the threads to find the thread we wanted.
4666     (let ((threads gnus-newsgroup-threads)
4667           sub)
4668       (while threads
4669         (setq sub (car threads))
4670         (if (stringp (car sub))
4671             ;; This is a gathered thread, so we look at the roots
4672             ;; below it to find whether this article is in this
4673             ;; gathered root.
4674             (progn
4675               (setq sub (cdr sub))
4676               (while sub
4677                 (when (member (caar sub) headers)
4678                   (setq thread (car threads)
4679                         threads nil
4680                         sub nil))
4681                 (setq sub (cdr sub))))
4682           ;; It's an ordinary thread, so we check it.
4683           (when (eq (car sub) (car headers))
4684             (setq thread sub
4685                   threads nil)))
4686         (setq threads (cdr threads)))
4687       ;; If this article is in no thread, then it's a root.
4688       (if thread
4689           (unless dont-remove
4690             (setq gnus-newsgroup-threads (delq thread gnus-newsgroup-threads)))
4691         (setq thread (gnus-id-to-thread last-id)))
4692       (when thread
4693         (prog1
4694             thread                      ; We return this thread.
4695           (unless dont-remove
4696             (if (stringp (car thread))
4697                 (progn
4698                   ;; If we use dummy roots, then we have to remove the
4699                   ;; dummy root as well.
4700                   (when (eq gnus-summary-make-false-root 'dummy)
4701                     ;; We go to the dummy root by going to
4702                     ;; the first sub-"thread", and then one line up.
4703                     (gnus-summary-goto-article
4704                      (mail-header-number (caadr thread)))
4705                     (forward-line -1)
4706                     (gnus-delete-line)
4707                     (gnus-data-compute-positions))
4708                   (setq thread (cdr thread))
4709                   (while thread
4710                     (gnus-remove-thread-1 (car thread))
4711                     (setq thread (cdr thread))))
4712               (gnus-remove-thread-1 thread))))))))
4713
4714 (defun gnus-remove-thread-1 (thread)
4715   "Remove the thread THREAD recursively."
4716   (let ((number (mail-header-number (pop thread)))
4717         d)
4718     (setq thread (reverse thread))
4719     (while thread
4720       (gnus-remove-thread-1 (pop thread)))
4721     (when (setq d (gnus-data-find number))
4722       (goto-char (gnus-data-pos d))
4723       (gnus-summary-show-thread)
4724       (gnus-data-remove
4725        number
4726        (- (point-at-bol)
4727           (prog1
4728               (1+ (point-at-eol))
4729             (gnus-delete-line)))))))
4730
4731 (defun gnus-sort-threads-recursive (threads func)
4732   (sort (mapcar (lambda (thread)
4733                   (cons (car thread)
4734                         (and (cdr thread)
4735                              (gnus-sort-threads-recursive (cdr thread) func))))
4736                 threads) func))
4737
4738 (defun gnus-sort-threads-loop (threads func)
4739   (let* ((superthread (cons nil threads))
4740          (stack (list (cons superthread threads)))
4741          remaining-threads thread)
4742     (while stack
4743       (setq remaining-threads (cdr (car stack)))
4744       (if remaining-threads
4745           (progn (setq thread (car remaining-threads))
4746                  (setcdr (car stack) (cdr remaining-threads))
4747                  (if (cdr thread)
4748                      (push (cons thread (cdr thread)) stack)))
4749         (setq thread (caar stack))
4750         (setcdr thread (sort (cdr thread) func))
4751         (pop stack)))
4752     (cdr superthread)))
4753
4754 (defun gnus-sort-threads (threads)
4755   "Sort THREADS."
4756   (if (not gnus-thread-sort-functions)
4757       threads
4758     (gnus-message 8 "Sorting threads...")
4759     (prog1
4760         (condition-case nil
4761             (let ((max-lisp-eval-depth (max max-lisp-eval-depth 5000)))
4762               (gnus-sort-threads-recursive
4763                threads (gnus-make-sort-function gnus-thread-sort-functions)))
4764           ;; Even after binding max-lisp-eval-depth, the recursive
4765           ;; sorter might fail for very long threads.  In that case,
4766           ;; try using a (less well-tested) non-recursive sorter.
4767           (error (gnus-sort-threads-loop
4768                   threads (gnus-make-sort-function
4769                            gnus-thread-sort-functions))))
4770       (gnus-message 8 "Sorting threads...done"))))
4771
4772 (defun gnus-sort-articles (articles)
4773   "Sort ARTICLES."
4774   (when gnus-article-sort-functions
4775     (gnus-message 7 "Sorting articles...")
4776     (prog1
4777         (setq gnus-newsgroup-headers
4778               (sort articles (gnus-make-sort-function
4779                               gnus-article-sort-functions)))
4780       (gnus-message 7 "Sorting articles...done"))))
4781
4782 ;; Written by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>.
4783 (defmacro gnus-thread-header (thread)
4784   "Return header of first article in THREAD.
4785 Note that THREAD must never, ever be anything else than a variable -
4786 using some other form will lead to serious barfage."
4787   (or (symbolp thread) (signal 'wrong-type-argument '(symbolp thread)))
4788   ;; (8% speedup to gnus-summary-prepare, just for fun :-)
4789   (list 'byte-code "\10\211:\203\17\0\211@;\203\16\0A@@\207"
4790         (vector thread) 2))
4791
4792 (defsubst gnus-article-sort-by-number (h1 h2)
4793   "Sort articles by article number."
4794   (< (mail-header-number h1)
4795      (mail-header-number h2)))
4796
4797 (defun gnus-thread-sort-by-number (h1 h2)
4798   "Sort threads by root article number."
4799   (gnus-article-sort-by-number
4800    (gnus-thread-header h1) (gnus-thread-header h2)))
4801
4802 (defsubst gnus-article-sort-by-random (h1 h2)
4803   "Sort articles randomly."
4804   (zerop (random 2)))
4805
4806 (defun gnus-thread-sort-by-random (h1 h2)
4807   "Sort threads randomly."
4808   (gnus-article-sort-by-random
4809    (gnus-thread-header h1) (gnus-thread-header h2)))
4810
4811 (defsubst gnus-article-sort-by-lines (h1 h2)
4812   "Sort articles by article Lines header."
4813   (< (mail-header-lines h1)
4814      (mail-header-lines h2)))
4815
4816 (defun gnus-thread-sort-by-lines (h1 h2)
4817   "Sort threads by root article Lines header."
4818   (gnus-article-sort-by-lines
4819    (gnus-thread-header h1) (gnus-thread-header h2)))
4820
4821 (defsubst gnus-article-sort-by-chars (h1 h2)
4822   "Sort articles by octet length."
4823   (< (mail-header-chars h1)
4824      (mail-header-chars h2)))
4825
4826 (defun gnus-thread-sort-by-chars (h1 h2)
4827   "Sort threads by root article octet length."
4828   (gnus-article-sort-by-chars
4829    (gnus-thread-header h1) (gnus-thread-header h2)))
4830
4831 (defsubst gnus-article-sort-by-author (h1 h2)
4832   "Sort articles by root author."
4833   (gnus-string<
4834    (let ((extract (funcall
4835                    gnus-extract-address-components
4836                    (mail-header-from h1))))
4837      (or (car extract) (cadr extract) ""))
4838    (let ((extract (funcall
4839                    gnus-extract-address-components
4840                    (mail-header-from h2))))
4841      (or (car extract) (cadr extract) ""))))
4842
4843 (defun gnus-thread-sort-by-author (h1 h2)
4844   "Sort threads by root author."
4845   (gnus-article-sort-by-author
4846    (gnus-thread-header h1)  (gnus-thread-header h2)))
4847
4848 (defsubst gnus-article-sort-by-recipient (h1 h2)
4849   "Sort articles by recipient."
4850   (gnus-string<
4851    (let ((extract (funcall
4852                    gnus-extract-address-components
4853                    (or (cdr (assq 'To (mail-header-extra h1))) ""))))
4854      (or (car extract) (cadr extract)))
4855    (let ((extract (funcall
4856                    gnus-extract-address-components
4857                    (or (cdr (assq 'To (mail-header-extra h2))) ""))))
4858      (or (car extract) (cadr extract)))))
4859
4860 (defun gnus-thread-sort-by-recipient (h1 h2)
4861   "Sort threads by root recipient."
4862   (gnus-article-sort-by-recipient
4863    (gnus-thread-header h1) (gnus-thread-header h2)))
4864
4865 (defsubst gnus-article-sort-by-subject (h1 h2)
4866   "Sort articles by root subject."
4867   (gnus-string<
4868    (downcase (gnus-simplify-subject-re (mail-header-subject h1)))
4869    (downcase (gnus-simplify-subject-re (mail-header-subject h2)))))
4870
4871 (defun gnus-thread-sort-by-subject (h1 h2)
4872   "Sort threads by root subject."
4873   (gnus-article-sort-by-subject
4874    (gnus-thread-header h1) (gnus-thread-header h2)))
4875
4876 (defsubst gnus-article-sort-by-date (h1 h2)
4877   "Sort articles by root article date."
4878   (time-less-p
4879    (gnus-date-get-time (mail-header-date h1))
4880    (gnus-date-get-time (mail-header-date h2))))
4881
4882 (defun gnus-thread-sort-by-date (h1 h2)
4883   "Sort threads by root article date."
4884   (gnus-article-sort-by-date
4885    (gnus-thread-header h1) (gnus-thread-header h2)))
4886
4887 (defsubst gnus-article-sort-by-score (h1 h2)
4888   "Sort articles by root article score.
4889 Unscored articles will be counted as having a score of zero."
4890   (> (or (cdr (assq (mail-header-number h1)
4891                     gnus-newsgroup-scored))
4892          gnus-summary-default-score 0)
4893      (or (cdr (assq (mail-header-number h2)
4894                     gnus-newsgroup-scored))
4895          gnus-summary-default-score 0)))
4896
4897 (defun gnus-thread-sort-by-score (h1 h2)
4898   "Sort threads by root article score."
4899   (gnus-article-sort-by-score
4900    (gnus-thread-header h1) (gnus-thread-header h2)))
4901
4902 (defun gnus-thread-sort-by-total-score (h1 h2)
4903   "Sort threads by the sum of all scores in the thread.
4904 Unscored articles will be counted as having a score of zero."
4905   (> (gnus-thread-total-score h1) (gnus-thread-total-score h2)))
4906
4907 (defun gnus-thread-total-score (thread)
4908   ;; This function find the total score of THREAD.
4909   (cond
4910    ((null thread)
4911     0)
4912    ((consp thread)
4913     (if (stringp (car thread))
4914         (apply gnus-thread-score-function 0
4915                (mapcar 'gnus-thread-total-score-1 (cdr thread)))
4916       (gnus-thread-total-score-1 thread)))
4917    (t
4918     (gnus-thread-total-score-1 (list thread)))))
4919
4920 (defun gnus-thread-sort-by-most-recent-number (h1 h2)
4921   "Sort threads such that the thread with the most recently arrived article comes first."
4922   (> (gnus-thread-highest-number h1) (gnus-thread-highest-number h2)))
4923
4924 (defun gnus-thread-highest-number (thread)
4925   "Return the highest article number in THREAD."
4926   (apply 'max (mapcar (lambda (header)
4927                         (mail-header-number header))
4928                       (message-flatten-list thread))))
4929
4930 (defun gnus-thread-sort-by-most-recent-date (h1 h2)
4931   "Sort threads such that the thread with the most recently dated article comes first."
4932   (> (gnus-thread-latest-date h1) (gnus-thread-latest-date h2)))
4933
4934 (defun gnus-thread-latest-date (thread)
4935   "Return the highest article date in THREAD."
4936   (let ((previous-time 0))
4937     (apply 'max
4938            (mapcar
4939             (lambda (header)
4940               (setq previous-time
4941                     (condition-case ()
4942                         (time-to-seconds (mail-header-parse-date
4943                                           (mail-header-date header)))
4944                       (error previous-time))))
4945             (sort
4946              (message-flatten-list thread)
4947              (lambda (h1 h2)
4948                (< (mail-header-number h1)
4949                   (mail-header-number h2))))))))
4950
4951 (defun gnus-thread-total-score-1 (root)
4952   ;; This function find the total score of the thread below ROOT.
4953   (setq root (car root))
4954   (apply gnus-thread-score-function
4955          (or (append
4956               (mapcar 'gnus-thread-total-score
4957                       (cdr (gnus-id-to-thread (mail-header-id root))))
4958               (when (> (mail-header-number root) 0)
4959                 (list (or (cdr (assq (mail-header-number root)
4960                                      gnus-newsgroup-scored))
4961                           gnus-summary-default-score 0))))
4962              (list gnus-summary-default-score)
4963              '(0))))
4964
4965 ;; Added by Per Abrahamsen <amanda@iesd.auc.dk>.
4966 (defvar gnus-tmp-prev-subject nil)
4967 (defvar gnus-tmp-false-parent nil)
4968 (defvar gnus-tmp-root-expunged nil)
4969 (defvar gnus-tmp-dummy-line nil)
4970
4971 (defun gnus-extra-header (type &optional header)
4972   "Return the extra header of TYPE."
4973   (or (cdr (assq type (mail-header-extra (or header gnus-tmp-header))))
4974       ""))
4975
4976 (defvar gnus-tmp-thread-tree-header-string "")
4977
4978 (defcustom gnus-sum-thread-tree-root "> "
4979   "With %B spec, used for the root of a thread.
4980 If nil, use subject instead."
4981   :version "22.1"
4982   :type '(radio (const :format "%v  " nil) string)
4983   :group 'gnus-thread)
4984
4985 (defcustom gnus-sum-thread-tree-false-root "> "
4986   "With %B spec, used for a false root of a thread.
4987 If nil, use subject instead."
4988   :version "22.1"
4989   :type '(radio (const :format "%v  " nil) string)
4990   :group 'gnus-thread)
4991
4992 (defcustom gnus-sum-thread-tree-single-indent ""
4993   "With %B spec, used for a thread with just one message.
4994 If nil, use subject instead."
4995   :version "22.1"
4996   :type '(radio (const :format "%v  " nil) string)
4997   :group 'gnus-thread)
4998
4999 (defcustom gnus-sum-thread-tree-vertical "| "
5000   "With %B spec, used for drawing a vertical line."
5001   :version "22.1"
5002   :type 'string
5003   :group 'gnus-thread)
5004
5005 (defcustom gnus-sum-thread-tree-indent "  "
5006   "With %B spec, used for indenting."
5007   :version "22.1"
5008   :type 'string
5009   :group 'gnus-thread)
5010
5011 (defcustom gnus-sum-thread-tree-leaf-with-other "+-> "
5012   "With %B spec, used for a leaf with brothers."
5013   :version "22.1"
5014   :type 'string
5015   :group 'gnus-thread)
5016
5017 (defcustom gnus-sum-thread-tree-single-leaf "\\-> "
5018   "With %B spec, used for a leaf without brothers."
5019   :version "22.1"
5020   :type 'string
5021   :group 'gnus-thread)
5022
5023 (defcustom gnus-summary-display-while-building nil
5024   "If non-nil, show and update the summary buffer as it's being built.
5025 If the value is t, update the buffer after every line is inserted.  If
5026 the value is an integer (N), update the display every N lines."
5027   :version "22.1"
5028   :group 'gnus-thread
5029   :type '(choice (const :tag "off" nil)
5030                  number
5031                  (const :tag "frequently" t)))
5032
5033 (defun gnus-summary-prepare-threads (threads)
5034   "Prepare summary buffer from THREADS and indentation LEVEL.
5035 THREADS is either a list of `(PARENT [(CHILD1 [(GRANDCHILD ...]...) ...])'
5036 or a straight list of headers."
5037   (gnus-message 7 "Generating summary...")
5038
5039   (setq gnus-newsgroup-threads threads)
5040   (beginning-of-line)
5041
5042   (let ((gnus-tmp-level 0)
5043         (default-score (or gnus-summary-default-score 0))
5044         (gnus-visual-p (gnus-visual-p 'summary-highlight 'highlight))
5045         (building-line-count gnus-summary-display-while-building)
5046         (building-count (integerp gnus-summary-display-while-building))
5047         thread number subject stack state gnus-tmp-gathered beg-match
5048         new-roots gnus-tmp-new-adopts thread-end simp-subject
5049         gnus-tmp-header gnus-tmp-unread gnus-tmp-downloaded
5050         gnus-tmp-replied gnus-tmp-subject-or-nil
5051         gnus-tmp-dummy gnus-tmp-indentation gnus-tmp-lines gnus-tmp-score
5052         gnus-tmp-score-char gnus-tmp-from gnus-tmp-name
5053         gnus-tmp-number gnus-tmp-opening-bracket gnus-tmp-closing-bracket
5054         tree-stack)
5055
5056     (setq gnus-tmp-prev-subject nil
5057           gnus-tmp-thread-tree-header-string "")
5058
5059     (if (vectorp (car threads))
5060         ;; If this is a straight (sic) list of headers, then a
5061         ;; threaded summary display isn't required, so we just create
5062         ;; an unthreaded one.
5063         (gnus-summary-prepare-unthreaded threads)
5064
5065       ;; Do the threaded display.
5066
5067       (if gnus-summary-display-while-building
5068           (switch-to-buffer (buffer-name)))
5069       (while (or threads stack gnus-tmp-new-adopts new-roots)
5070
5071         (if (and (= gnus-tmp-level 0)
5072                  (or (not stack)
5073                      (= (caar stack) 0))
5074                  (not gnus-tmp-false-parent)
5075                  (or gnus-tmp-new-adopts new-roots))
5076             (if gnus-tmp-new-adopts
5077                 (setq gnus-tmp-level (if gnus-tmp-root-expunged 0 1)
5078                       thread (list (car gnus-tmp-new-adopts))
5079                       gnus-tmp-header (caar thread)
5080                       gnus-tmp-new-adopts (cdr gnus-tmp-new-adopts))
5081               (when new-roots
5082                 (setq thread (list (car new-roots))
5083                       gnus-tmp-header (caar thread)
5084                       new-roots (cdr new-roots))))
5085
5086           (if threads
5087               ;; If there are some threads, we do them before the
5088               ;; threads on the stack.
5089               (setq thread threads
5090                     gnus-tmp-header (caar thread))
5091             ;; There were no current threads, so we pop something off
5092             ;; the stack.
5093             (setq state (car stack)
5094                   gnus-tmp-level (car state)
5095                   tree-stack (cadr state)
5096                   thread (caddr state)
5097                   stack (cdr stack)
5098                   gnus-tmp-header (caar thread))))
5099
5100         (setq gnus-tmp-false-parent nil)
5101         (setq gnus-tmp-root-expunged nil)
5102         (setq thread-end nil)
5103
5104         (if (stringp gnus-tmp-header)
5105             ;; The header is a dummy root.
5106             (cond
5107              ((eq gnus-summary-make-false-root 'adopt)
5108               ;; We let the first article adopt the rest.
5109               (setq gnus-tmp-new-adopts (nconc gnus-tmp-new-adopts
5110                                                (cddar thread)))
5111               (setq gnus-tmp-gathered
5112                     (nconc (mapcar
5113                             (lambda (h) (mail-header-number (car h)))
5114                             (cddar thread))
5115                            gnus-tmp-gathered))
5116               (setq thread (cons (list (caar thread)
5117                                        (cadar thread))
5118                                  (cdr thread)))
5119               (setq gnus-tmp-level -1
5120                     gnus-tmp-false-parent t))
5121              ((eq gnus-summary-make-false-root 'empty)
5122               ;; We print adopted articles with empty subject fields.
5123               (setq gnus-tmp-gathered
5124                     (nconc (mapcar
5125                             (lambda (h) (mail-header-number (car h)))
5126                             (cddar thread))
5127                            gnus-tmp-gathered))
5128               (setq gnus-tmp-level -1))
5129              ((eq gnus-summary-make-false-root 'dummy)
5130               ;; We remember that we probably want to output a dummy
5131               ;; root.
5132               (setq gnus-tmp-dummy-line gnus-tmp-header)
5133               (setq gnus-tmp-prev-subject gnus-tmp-header))
5134              (t
5135               ;; We do not make a root for the gathered
5136               ;; sub-threads at all.
5137               (setq gnus-tmp-level -1)))
5138
5139           (setq number (mail-header-number gnus-tmp-header)
5140                 subject (mail-header-subject gnus-tmp-header)
5141                 simp-subject (gnus-simplify-subject-fully subject))
5142
5143           (cond
5144            ;; If the thread has changed subject, we might want to make
5145            ;; this subthread into a root.
5146            ((and (null gnus-thread-ignore-subject)
5147                  (not (zerop gnus-tmp-level))
5148                  gnus-tmp-prev-subject
5149                  (not (string= gnus-tmp-prev-subject simp-subject)))
5150             (setq new-roots (nconc new-roots (list (car thread)))
5151                   thread-end t
5152                   gnus-tmp-header nil))
5153            ;; If the article lies outside the current limit,
5154            ;; then we do not display it.
5155            ((not (memq number gnus-newsgroup-limit))
5156             (setq gnus-tmp-gathered
5157                   (nconc (mapcar
5158                           (lambda (h) (mail-header-number (car h)))
5159                           (cdar thread))
5160                          gnus-tmp-gathered))
5161             (setq gnus-tmp-new-adopts (if (cdar thread)
5162                                           (append gnus-tmp-new-adopts
5163                                                   (cdar thread))
5164                                         gnus-tmp-new-adopts)
5165                   thread-end t
5166                   gnus-tmp-header nil)
5167             (when (zerop gnus-tmp-level)
5168               (setq gnus-tmp-root-expunged t)))
5169            ;; Perhaps this article is to be marked as read?
5170            ((and gnus-summary-mark-below
5171                  (< (or (cdr (assq number gnus-newsgroup-scored))
5172                         default-score)
5173                     gnus-summary-mark-below)
5174                  ;; Don't touch sparse articles.
5175                  (not (gnus-summary-article-sparse-p number))
5176                  (not (gnus-summary-article-ancient-p number)))
5177             (setq gnus-newsgroup-unreads
5178                   (delq number gnus-newsgroup-unreads))
5179             (if gnus-newsgroup-auto-expire
5180                 (setq gnus-newsgroup-expirable
5181                       (gnus-add-to-sorted-list
5182                        gnus-newsgroup-expirable number))
5183               (push (cons number gnus-low-score-mark)
5184                     gnus-newsgroup-reads))))
5185
5186           (when gnus-tmp-header
5187             ;; We may have an old dummy line to output before this
5188             ;; article.
5189             (when (and gnus-tmp-dummy-line
5190                        (gnus-subject-equal
5191                         gnus-tmp-dummy-line
5192                         (mail-header-subject gnus-tmp-header)))
5193               (gnus-summary-insert-dummy-line
5194                gnus-tmp-dummy-line (mail-header-number gnus-tmp-header))
5195               (setq gnus-tmp-dummy-line nil))
5196
5197             ;; Compute the mark.
5198             (setq gnus-tmp-unread (gnus-article-mark number))
5199
5200             (push (gnus-data-make number gnus-tmp-unread (1+ (point))
5201                                   gnus-tmp-header gnus-tmp-level)
5202                   gnus-newsgroup-data)
5203
5204             ;; Actually insert the line.
5205             (setq
5206              gnus-tmp-subject-or-nil
5207              (cond
5208               ((and gnus-thread-ignore-subject
5209                     gnus-tmp-prev-subject
5210                     (not (string= gnus-tmp-prev-subject simp-subject)))
5211                subject)
5212               ((zerop gnus-tmp-level)
5213                (if (and (eq gnus-summary-make-false-root 'empty)
5214                         (memq number gnus-tmp-gathered)
5215                         gnus-tmp-prev-subject
5216                         (string= gnus-tmp-prev-subject simp-subject))
5217                    gnus-summary-same-subject
5218                  subject))
5219               (t gnus-summary-same-subject)))
5220             (if (and (eq gnus-summary-make-false-root 'adopt)
5221                      (= gnus-tmp-level 1)
5222                      (memq number gnus-tmp-gathered))
5223                 (setq gnus-tmp-opening-bracket ?\<
5224                       gnus-tmp-closing-bracket ?\>)
5225               (setq gnus-tmp-opening-bracket ?\[
5226                     gnus-tmp-closing-bracket ?\]))
5227             (if (>= gnus-tmp-level (length gnus-thread-indent-array))
5228                 (gnus-make-thread-indent-array
5229                  (max (* 2 (length gnus-thread-indent-array))
5230                       gnus-tmp-level)))
5231             (setq
5232              gnus-tmp-indentation
5233              (aref gnus-thread-indent-array gnus-tmp-level)
5234              gnus-tmp-lines (mail-header-lines gnus-tmp-header)
5235              gnus-tmp-score (or (cdr (assq number gnus-newsgroup-scored))
5236                                 gnus-summary-default-score 0)
5237              gnus-tmp-score-char
5238              (if (or (null gnus-summary-default-score)
5239                      (<= (abs (- gnus-tmp-score gnus-summary-default-score))
5240                          gnus-summary-zcore-fuzz))
5241                  ?                      ;Whitespace
5242                (if (< gnus-tmp-score gnus-summary-default-score)
5243                    gnus-score-below-mark gnus-score-over-mark))
5244              gnus-tmp-replied
5245              (cond ((memq number gnus-newsgroup-processable)
5246                     gnus-process-mark)
5247                    ((memq number gnus-newsgroup-cached)
5248                     gnus-cached-mark)
5249                    ((memq number gnus-newsgroup-replied)
5250                     gnus-replied-mark)
5251                    ((memq number gnus-newsgroup-forwarded)
5252                     gnus-forwarded-mark)
5253                    ((memq number gnus-newsgroup-saved)
5254                     gnus-saved-mark)
5255                    ((memq number gnus-newsgroup-recent)
5256                     gnus-recent-mark)
5257                    ((memq number gnus-newsgroup-unseen)
5258                     gnus-unseen-mark)
5259                    (t gnus-no-mark))
5260              gnus-tmp-downloaded
5261              (cond ((memq number gnus-newsgroup-undownloaded)
5262                     gnus-undownloaded-mark)
5263                    (gnus-newsgroup-agentized
5264                     gnus-downloaded-mark)
5265                    (t
5266                     gnus-no-mark))
5267              gnus-tmp-from (mail-header-from gnus-tmp-header)
5268              gnus-tmp-name
5269              (cond
5270               ((string-match "<[^>]+> *$" gnus-tmp-from)
5271                (setq beg-match (match-beginning 0))
5272                (or (and (string-match "^\".+\"" gnus-tmp-from)
5273                         (substring gnus-tmp-from 1 (1- (match-end 0))))
5274                    (substring gnus-tmp-from 0 beg-match)))
5275               ((string-match "(.+)" gnus-tmp-from)
5276                (substring gnus-tmp-from
5277                           (1+ (match-beginning 0)) (1- (match-end 0))))
5278               (t gnus-tmp-from))
5279
5280              ;; Do the %B string
5281              gnus-tmp-thread-tree-header-string
5282              (cond
5283               ((not gnus-show-threads) "")
5284               ((zerop gnus-tmp-level)
5285                (cond ((cdar thread)
5286                       (or gnus-sum-thread-tree-root subject))
5287                      (gnus-tmp-new-adopts
5288                       (or gnus-sum-thread-tree-false-root subject))
5289                      (t
5290                       (or gnus-sum-thread-tree-single-indent subject))))
5291               (t
5292                (concat (apply 'concat
5293                               (mapcar (lambda (item)
5294                                         (if (= item 1)
5295                                             gnus-sum-thread-tree-vertical
5296                                           gnus-sum-thread-tree-indent))
5297                                       (cdr (reverse tree-stack))))
5298                        (if (nth 1 thread)
5299                            gnus-sum-thread-tree-leaf-with-other
5300                          gnus-sum-thread-tree-single-leaf)))))
5301             (when (string= gnus-tmp-name "")
5302               (setq gnus-tmp-name gnus-tmp-from))
5303             (unless (numberp gnus-tmp-lines)
5304               (setq gnus-tmp-lines -1))
5305             (if (= gnus-tmp-lines -1)
5306                 (setq gnus-tmp-lines "?")
5307               (setq gnus-tmp-lines (number-to-string gnus-tmp-lines)))
5308               (gnus-put-text-property
5309              (point)
5310              (progn (eval gnus-summary-line-format-spec) (point))
5311                'gnus-number number)
5312             (when gnus-visual-p
5313               (forward-line -1)
5314               (gnus-run-hooks 'gnus-summary-update-hook)
5315               (forward-line 1))
5316
5317             (setq gnus-tmp-prev-subject simp-subject)))
5318
5319         (when (nth 1 thread)
5320           (push (list (max 0 gnus-tmp-level)
5321                       (copy-sequence tree-stack)
5322                       (nthcdr 1 thread))
5323                 stack))
5324         (push (if (nth 1 thread) 1 0) tree-stack)
5325         (incf gnus-tmp-level)
5326         (setq threads (if thread-end nil (cdar thread)))
5327         (if gnus-summary-display-while-building
5328             (if building-count
5329                 (progn
5330                   ;; use a set frequency
5331                   (setq building-line-count (1- building-line-count))
5332                   (when (= building-line-count 0)
5333                     (sit-for 0)
5334                     (setq building-line-count
5335                           gnus-summary-display-while-building)))
5336               ;; always
5337               (sit-for 0)))
5338         (unless threads
5339           (setq gnus-tmp-level 0)))))
5340   (gnus-message 7 "Generating summary...done"))
5341
5342 (defun gnus-summary-prepare-unthreaded (headers)
5343   "Generate an unthreaded summary buffer based on HEADERS."
5344   (let (header number mark)
5345
5346     (beginning-of-line)
5347
5348     (while headers
5349       ;; We may have to root out some bad articles...
5350       (when (memq (setq number (mail-header-number
5351                                 (setq header (pop headers))))
5352                   gnus-newsgroup-limit)
5353         ;; Mark article as read when it has a low score.
5354         (when (and gnus-summary-mark-below
5355                    (< (or (cdr (assq number gnus-newsgroup-scored))
5356                           gnus-summary-default-score 0)
5357                       gnus-summary-mark-below)
5358                    (not (gnus-summary-article-ancient-p number)))
5359           (setq gnus-newsgroup-unreads
5360                 (delq number gnus-newsgroup-unreads))
5361           (if gnus-newsgroup-auto-expire
5362               (push number gnus-newsgroup-expirable)
5363             (push (cons number gnus-low-score-mark)
5364                   gnus-newsgroup-reads)))
5365
5366         (setq mark (gnus-article-mark number))
5367         (push (gnus-data-make number mark (1+ (point)) header 0)
5368               gnus-newsgroup-data)
5369         (gnus-summary-insert-line
5370          header 0 number
5371          (memq number gnus-newsgroup-undownloaded)
5372          mark (memq number gnus-newsgroup-replied)
5373          (memq number gnus-newsgroup-expirable)
5374          (mail-header-subject header) nil
5375          (cdr (assq number gnus-newsgroup-scored))
5376          (memq number gnus-newsgroup-processable))))))
5377
5378 (defun gnus-summary-remove-list-identifiers ()
5379   "Remove list identifiers in `gnus-list-identifiers' from articles in the current group."
5380   (let ((regexp (if (consp gnus-list-identifiers)
5381                     (mapconcat 'identity gnus-list-identifiers " *\\|")
5382                   gnus-list-identifiers))
5383         changed subject)
5384     (when regexp
5385       (setq regexp (concat "^\\(?:R[Ee]: +\\)*\\(" regexp " *\\)"))
5386       (dolist (header gnus-newsgroup-headers)
5387         (setq subject (mail-header-subject header)
5388               changed nil)
5389         (while (string-match regexp subject)
5390           (setq subject
5391                 (concat (substring subject 0 (match-beginning 1))
5392                         (substring subject (match-end 0)))
5393                 changed t))
5394         (when changed
5395           (when (string-match "^\\(\\(?:R[Ee]: +\\)+\\)R[Ee]: +" subject)
5396             (setq subject
5397                   (concat (substring subject 0 (match-beginning 1))
5398                           (substring subject (match-end 1)))))
5399           (mail-header-set-subject header subject))))))
5400
5401 (defun gnus-fetch-headers (articles)
5402   "Fetch headers of ARTICLES."
5403   (let ((name (gnus-group-decoded-name gnus-newsgroup-name)))
5404     (gnus-message 5 "Fetching headers for %s..." name)
5405     (prog1
5406         (if (eq 'nov
5407                 (setq gnus-headers-retrieved-by
5408                       (gnus-retrieve-headers
5409                        articles gnus-newsgroup-name
5410                        ;; We might want to fetch old headers, but
5411                        ;; not if there is only 1 article.
5412                        (and (or (and
5413                                  (not (eq gnus-fetch-old-headers 'some))
5414                                  (not (numberp gnus-fetch-old-headers)))
5415                                 (> (length articles) 1))
5416                             gnus-fetch-old-headers))))
5417             (gnus-get-newsgroup-headers-xover
5418              articles nil nil gnus-newsgroup-name t)
5419           (gnus-get-newsgroup-headers))
5420       (gnus-message 5 "Fetching headers for %s...done" name))))
5421
5422 (defun gnus-select-newsgroup (group &optional read-all select-articles)
5423   "Select newsgroup GROUP.
5424 If READ-ALL is non-nil, all articles in the group are selected.
5425 If SELECT-ARTICLES, only select those articles from GROUP."
5426   (let* ((entry (gnus-group-entry group))
5427          ;;!!! Dirty hack; should be removed.
5428          (gnus-summary-ignore-duplicates
5429           (if (eq (car (gnus-find-method-for-group group)) 'nnvirtual)
5430               t
5431             gnus-summary-ignore-duplicates))
5432          (info (nth 2 entry))
5433          charset articles fetched-articles cached)
5434
5435     (unless (gnus-check-server
5436              (set (make-local-variable 'gnus-current-select-method)
5437                   (gnus-find-method-for-group group)))
5438       (error "Couldn't open server"))
5439     (setq charset (gnus-group-name-charset gnus-current-select-method group))
5440
5441     (or (and entry (not (eq (car entry) t))) ; Either it's active...
5442         (gnus-activate-group group)     ; Or we can activate it...
5443         (progn                          ; Or we bug out.
5444           (when (equal major-mode 'gnus-summary-mode)
5445             (gnus-kill-buffer (current-buffer)))
5446           (error
5447            "Couldn't activate group %s: %s"
5448            (mm-decode-coding-string group charset)
5449            (mm-decode-coding-string (gnus-status-message group) charset))))
5450
5451     (unless (gnus-request-group group t)
5452         (when (equal major-mode 'gnus-summary-mode)
5453           (gnus-kill-buffer (current-buffer)))
5454         (error "Couldn't request group %s: %s"
5455                (mm-decode-coding-string group charset)
5456                (mm-decode-coding-string (gnus-status-message group) charset)))
5457
5458     (when gnus-agent
5459       (gnus-agent-possibly-alter-active group (gnus-active group) info)
5460
5461       (setq gnus-summary-use-undownloaded-faces
5462             (gnus-agent-find-parameter
5463              group
5464              'agent-enable-undownloaded-faces)))
5465
5466     (setq gnus-newsgroup-name group
5467           gnus-newsgroup-unselected nil
5468           gnus-newsgroup-unreads (gnus-list-of-unread-articles group))
5469
5470     (let ((display (gnus-group-find-parameter group 'display)))
5471       (setq gnus-newsgroup-display
5472             (cond
5473              ((not (zerop (or (car-safe read-all) 0)))
5474               ;; The user entered the group with C-u SPC/RET, let's show
5475               ;; all articles.
5476               'gnus-not-ignore)
5477              ((eq display 'all)
5478               'gnus-not-ignore)
5479              ((arrayp display)
5480               (gnus-summary-display-make-predicate (mapcar 'identity display)))
5481              ((numberp display)
5482               ;; The following is probably the "correct" solution, but
5483               ;; it makes Gnus fetch all headers and then limit the
5484               ;; articles (which is slow), so instead we hack the
5485               ;; select-articles parameter instead. -- Simon Josefsson
5486               ;; <jas@kth.se>
5487               ;;
5488               ;; (gnus-byte-compile
5489               ;;  `(lambda () (> number ,(- (cdr (gnus-active group))
5490               ;;                         display)))))
5491               (setq select-articles
5492                     (gnus-uncompress-range
5493                      (cons (let ((tmp (- (cdr (gnus-active group)) display)))
5494                              (if (> tmp 0)
5495                                  tmp
5496                                1))
5497                            (cdr (gnus-active group)))))
5498               nil)
5499              (t
5500               nil))))
5501
5502     (gnus-summary-setup-default-charset)
5503
5504     ;; Kludge to avoid having cached articles nixed out in virtual groups.
5505     (when (gnus-virtual-group-p group)
5506       (setq cached gnus-newsgroup-cached))
5507
5508     (setq gnus-newsgroup-unreads
5509           (gnus-sorted-ndifference
5510            (gnus-sorted-ndifference gnus-newsgroup-unreads
5511                                     gnus-newsgroup-marked)
5512            gnus-newsgroup-dormant))
5513
5514     (setq gnus-newsgroup-processable nil)
5515
5516     (gnus-update-read-articles group gnus-newsgroup-unreads)
5517
5518     ;; Adjust and set lists of article marks.
5519     (when info
5520       (gnus-adjust-marked-articles info))
5521     (if (setq articles select-articles)
5522         (setq gnus-newsgroup-unselected
5523               (gnus-sorted-difference gnus-newsgroup-unreads articles))
5524       (setq articles (gnus-articles-to-read group read-all)))
5525
5526     (cond
5527      ((null articles)
5528       ;;(gnus-message 3 "Couldn't select newsgroup -- no articles to display")
5529       'quit)
5530      ((eq articles 0) nil)
5531      (t
5532       ;; Init the dependencies hash table.
5533       (setq gnus-newsgroup-dependencies
5534             (gnus-make-hashtable (length articles)))
5535       (gnus-set-global-variables)
5536       ;; Retrieve the headers and read them in.
5537
5538       (setq gnus-newsgroup-headers (gnus-fetch-headers articles))
5539
5540       ;; Kludge to avoid having cached articles nixed out in virtual groups.
5541       (when cached
5542         (setq gnus-newsgroup-cached cached))
5543
5544       ;; Suppress duplicates?
5545       (when gnus-suppress-duplicates
5546         (gnus-dup-suppress-articles))
5547
5548       ;; Set the initial limit.
5549       (setq gnus-newsgroup-limit (copy-sequence articles))
5550       ;; Remove canceled articles from the list of unread articles.
5551       (setq fetched-articles
5552             (mapcar (lambda (headers) (mail-header-number headers))
5553                     gnus-newsgroup-headers))
5554       (setq gnus-newsgroup-articles fetched-articles)
5555       (setq gnus-newsgroup-unreads
5556             (gnus-sorted-nintersection
5557              gnus-newsgroup-unreads fetched-articles))
5558       (gnus-compute-unseen-list)
5559
5560       ;; Removed marked articles that do not exist.
5561       (gnus-update-missing-marks
5562        (gnus-sorted-difference articles fetched-articles))
5563       ;; We might want to build some more threads first.
5564       (when (and gnus-fetch-old-headers
5565                  (eq gnus-headers-retrieved-by 'nov))
5566         (if (eq gnus-fetch-old-headers 'invisible)
5567             (gnus-build-all-threads)
5568           (gnus-build-old-threads)))
5569       ;; Let the Gnus agent mark articles as read.
5570       (when gnus-agent
5571         (gnus-agent-get-undownloaded-list))
5572       ;; Remove list identifiers from subject
5573       (when gnus-list-identifiers
5574         (gnus-summary-remove-list-identifiers))
5575       ;; Check whether auto-expire is to be done in this group.
5576       (setq gnus-newsgroup-auto-expire
5577             (gnus-group-auto-expirable-p group))
5578       ;; Set up the article buffer now, if necessary.
5579       (unless (and gnus-single-article-buffer
5580                    (equal gnus-article-buffer "*Article*"))
5581         (gnus-article-setup-buffer))
5582       ;; First and last article in this newsgroup.
5583       (when gnus-newsgroup-headers
5584         (setq gnus-newsgroup-begin
5585               (mail-header-number (car gnus-newsgroup-headers))
5586               gnus-newsgroup-end
5587               (mail-header-number
5588                (gnus-last-element gnus-newsgroup-headers))))
5589       ;; GROUP is successfully selected.
5590       (or gnus-newsgroup-headers t)))))
5591
5592 (defun gnus-compute-unseen-list ()
5593   ;; The `seen' marks are treated specially.
5594   (if (not gnus-newsgroup-seen)
5595       (setq gnus-newsgroup-unseen gnus-newsgroup-articles)
5596     (setq gnus-newsgroup-unseen
5597           (gnus-inverse-list-range-intersection
5598            gnus-newsgroup-articles gnus-newsgroup-seen))))
5599
5600 (declare-function gnus-get-predicate "gnus-agent" (predicate))
5601
5602 (defun gnus-summary-display-make-predicate (display)
5603   (require 'gnus-agent)
5604   (when (= (length display) 1)
5605     (setq display (car display)))
5606   (unless gnus-summary-display-cache
5607     (dolist (elem (append '((unread . unread)
5608                             (read . read)
5609                             (unseen . unseen))
5610                           gnus-article-mark-lists))
5611       (push (cons (cdr elem)
5612                   (gnus-byte-compile
5613                    `(lambda () (gnus-article-marked-p ',(cdr elem)))))
5614             gnus-summary-display-cache)))
5615   (let ((gnus-category-predicate-alist gnus-summary-display-cache)
5616         (gnus-category-predicate-cache gnus-summary-display-cache))
5617     (gnus-get-predicate display)))
5618
5619 ;; Uses the dynamically bound `number' variable.
5620 (defvar number)
5621 (defun gnus-article-marked-p (type &optional article)
5622   (let ((article (or article number)))
5623     (cond
5624      ((eq type 'tick)
5625       (memq article gnus-newsgroup-marked))
5626      ((eq type 'spam)
5627       (memq article gnus-newsgroup-spam-marked))
5628      ((eq type 'unsend)
5629       (memq article gnus-newsgroup-unsendable))
5630      ((eq type 'undownload)
5631       (memq article gnus-newsgroup-undownloaded))
5632      ((eq type 'download)
5633       (memq article gnus-newsgroup-downloadable))
5634      ((eq type 'unread)
5635       (memq article gnus-newsgroup-unreads))
5636      ((eq type 'read)
5637       (memq article gnus-newsgroup-reads))
5638      ((eq type 'dormant)
5639       (memq article gnus-newsgroup-dormant) )
5640      ((eq type 'expire)
5641       (memq article gnus-newsgroup-expirable))
5642      ((eq type 'reply)
5643       (memq article gnus-newsgroup-replied))
5644      ((eq type 'killed)
5645       (memq article gnus-newsgroup-killed))
5646      ((eq type 'bookmark)
5647       (assq article gnus-newsgroup-bookmarks))
5648      ((eq type 'score)
5649       (assq article gnus-newsgroup-scored))
5650      ((eq type 'save)
5651       (memq article gnus-newsgroup-saved))
5652      ((eq type 'cache)
5653       (memq article gnus-newsgroup-cached))
5654      ((eq type 'forward)
5655       (memq article gnus-newsgroup-forwarded))
5656      ((eq type 'seen)
5657       (not (memq article gnus-newsgroup-unseen)))
5658      ((eq type 'recent)
5659       (memq article gnus-newsgroup-recent))
5660      (t t))))
5661
5662 (defun gnus-articles-to-read (group &optional read-all)
5663   "Find out what articles the user wants to read."
5664   (let* ((articles
5665           ;; Select all articles if `read-all' is non-nil, or if there
5666           ;; are no unread articles.
5667           (if (or read-all
5668                   (and (zerop (length gnus-newsgroup-marked))
5669                        (zerop (length gnus-newsgroup-unreads)))
5670                   ;; Fetch all if the predicate is non-nil.
5671                   gnus-newsgroup-display)
5672               ;; We want to select the headers for all the articles in
5673               ;; the group, so we select either all the active
5674               ;; articles in the group, or (if that's nil), the
5675               ;; articles in the cache.
5676               (or
5677                (if gnus-newsgroup-maximum-articles
5678                    (let ((active (gnus-active group)))
5679                      (gnus-uncompress-range
5680                       (cons (max (car active)
5681                                  (- (cdr active)
5682                                     gnus-newsgroup-maximum-articles
5683                                     -1))
5684                             (cdr active))))
5685                  (gnus-uncompress-range (gnus-active group)))
5686                (gnus-cache-articles-in-group group))
5687             ;; Select only the "normal" subset of articles.
5688             (gnus-sorted-nunion
5689              (gnus-sorted-union gnus-newsgroup-dormant gnus-newsgroup-marked)
5690              gnus-newsgroup-unreads)))
5691          (scored-list (gnus-killed-articles gnus-newsgroup-killed articles))
5692          (scored (length scored-list))
5693          (number (length articles))
5694          (marked (+ (length gnus-newsgroup-marked)
5695                     (length gnus-newsgroup-dormant)))
5696          (select
5697           (cond
5698            ((numberp read-all)
5699             read-all)
5700            ((numberp gnus-newsgroup-display)
5701             gnus-newsgroup-display)
5702            (t
5703             (condition-case ()
5704                 (cond
5705                  ((and (or (<= scored marked) (= scored number))
5706                        (numberp gnus-large-newsgroup)
5707                        (> number gnus-large-newsgroup))
5708                   (let* ((cursor-in-echo-area nil)
5709                          (initial (gnus-parameter-large-newsgroup-initial
5710                                    gnus-newsgroup-name))
5711                          (input
5712                           (read-string
5713                            (format
5714                             "How many articles from %s (%s %d): "
5715                             (gnus-group-decoded-name gnus-newsgroup-name)
5716                             (if initial "max" "default")
5717                             number)
5718                            (if initial
5719                                (cons (number-to-string initial)
5720                                      0)))))
5721                     (if (string-match "^[ \t]*$" input) number input)))
5722                  ((and (> scored marked) (< scored number)
5723                        (> (- scored number) 20))
5724                   (let ((input
5725                          (read-string
5726                           (format "%s %s (%d scored, %d total): "
5727                                   "How many articles from"
5728                                   (gnus-group-decoded-name group)
5729                                   scored number))))
5730                     (if (string-match "^[ \t]*$" input)
5731                         number input)))
5732                  (t number))
5733               (quit
5734                (message "Quit getting the articles to read")
5735                nil))))))
5736     (setq select (if (stringp select) (string-to-number select) select))
5737     (if (or (null select) (zerop select))
5738         select
5739       (if (and (not (zerop scored)) (<= (abs select) scored))
5740           (progn
5741             (setq articles (sort scored-list '<))
5742             (setq number (length articles)))
5743         (setq articles (copy-sequence articles)))
5744
5745       (when (< (abs select) number)
5746         (if (< select 0)
5747             ;; Select the N oldest articles.
5748             (setcdr (nthcdr (1- (abs select)) articles) nil)
5749           ;; Select the N most recent articles.
5750           (setq articles (nthcdr (- number select) articles))))
5751       (setq gnus-newsgroup-unselected
5752             (gnus-sorted-difference gnus-newsgroup-unreads articles))
5753       (when gnus-alter-articles-to-read-function
5754         (setq articles
5755               (sort
5756                (funcall gnus-alter-articles-to-read-function
5757                         gnus-newsgroup-name articles)
5758                '<)))
5759       articles)))
5760
5761 (defun gnus-killed-articles (killed articles)
5762   (let (out)
5763     (while articles
5764       (when (inline (gnus-member-of-range (car articles) killed))
5765         (push (car articles) out))
5766       (setq articles (cdr articles)))
5767     out))
5768
5769 (defun gnus-uncompress-marks (marks)
5770   "Uncompress the mark ranges in MARKS."
5771   (let ((uncompressed '(score bookmark))
5772         out)
5773     (while marks
5774       (if (memq (caar marks) uncompressed)
5775           (push (car marks) out)
5776         (push (cons (caar marks) (gnus-uncompress-range (cdar marks))) out))
5777       (setq marks (cdr marks)))
5778     out))
5779
5780 (defun gnus-article-mark-to-type (mark)
5781   "Return the type of MARK."
5782   (or (cadr (assq mark gnus-article-special-mark-lists))
5783       'list))
5784
5785 (defun gnus-article-unpropagatable-p (mark)
5786   "Return whether MARK should be propagated to back end."
5787   (memq mark gnus-article-unpropagated-mark-lists))
5788
5789 (defun gnus-adjust-marked-articles (info)
5790   "Set all article lists and remove all marks that are no longer valid."
5791   (let* ((marked-lists (gnus-info-marks info))
5792          (active (gnus-active (gnus-info-group info)))
5793          (min (car active))
5794          (max (cdr active))
5795          (types gnus-article-mark-lists)
5796          marks var articles article mark mark-type
5797          bgn end)
5798
5799     (dolist (marks marked-lists)
5800       (setq mark (car marks)
5801             mark-type (gnus-article-mark-to-type mark)
5802             var (intern (format "gnus-newsgroup-%s" (car (rassq mark types)))))
5803
5804       ;; We set the variable according to the type of the marks list,
5805       ;; and then adjust the marks to a subset of the active articles.
5806       (cond
5807        ;; Adjust "simple" lists - compressed yet unsorted
5808        ((eq mark-type 'list)
5809         ;; Simultaneously uncompress and clip to active range
5810         ;; See gnus-uncompress-range for a description of possible marks
5811         (let (l lh)
5812           (if (not (cadr marks))
5813               (set var nil)
5814             (setq articles (if (numberp (cddr marks))
5815                                (list (cdr marks))
5816                              (cdr marks))
5817                   lh (cons nil nil)
5818                   l lh)
5819
5820             (while (setq article (pop articles))
5821               (cond ((consp article)
5822                      (setq bgn (max (car article) min)
5823                            end (min (cdr article) max))
5824                      (while (<= bgn end)
5825                        (setq l (setcdr l (cons bgn nil))
5826                              bgn (1+ bgn))))
5827                     ((and (<= min article)
5828                           (>= max article))
5829                      (setq l (setcdr l (cons article nil))))))
5830             (set var (cdr lh)))))
5831        ;; Adjust assocs.
5832        ((eq mark-type 'tuple)
5833         (set var (setq articles (cdr marks)))
5834         (when (not (listp (cdr (symbol-value var))))
5835           (set var (list (symbol-value var))))
5836         (when (not (listp (cdr articles)))
5837           (setq articles (list articles)))
5838         (while articles
5839           (when (or (not (consp (setq article (pop articles))))
5840                     (< (car article) min)
5841                     (> (car article) max))
5842             (set var (delq article (symbol-value var))))))
5843        ;; Adjust ranges (sloppily).
5844        ((eq mark-type 'range)
5845         (cond
5846          ((eq mark 'seen)
5847           ;; Fix the record for `seen' if it looks like (seen NUM1 . NUM2).
5848           ;; It should be (seen (NUM1 . NUM2)).
5849           (when (numberp (cddr marks))
5850             (setcdr marks (list (cdr marks))))
5851           (setq articles (cdr marks))
5852           (while (and articles
5853                       (or (and (consp (car articles))
5854                                (> min (cdar articles)))
5855                           (and (numberp (car articles))
5856                                (> min (car articles)))))
5857             (pop articles))
5858           (set var articles))))))))
5859
5860 (defun gnus-update-missing-marks (missing)
5861   "Go through the list of MISSING articles and remove them from the mark lists."
5862   (when missing
5863     (let (var m)
5864       ;; Go through all types.
5865       (dolist (elem gnus-article-mark-lists)
5866         (when (eq (gnus-article-mark-to-type (cdr elem)) 'list)
5867           (setq var (intern (format "gnus-newsgroup-%s" (car elem))))
5868           (when (symbol-value var)
5869             ;; This list has articles.  So we delete all missing
5870             ;; articles from it.
5871             (setq m missing)
5872             (while m
5873               (set var (delq (pop m) (symbol-value var))))))))))
5874
5875 (defun gnus-update-marks ()
5876   "Enter the various lists of marked articles into the newsgroup info list."
5877   (let ((types gnus-article-mark-lists)
5878         (info (gnus-get-info gnus-newsgroup-name))
5879         type list newmarked symbol delta-marks)
5880     (when info
5881       ;; Add all marks lists to the list of marks lists.
5882       (while (setq type (pop types))
5883         (setq list (symbol-value
5884                     (setq symbol
5885                           (intern (format "gnus-newsgroup-%s" (car type))))))
5886
5887         (when list
5888           ;; Get rid of the entries of the articles that have the
5889           ;; default score.
5890           (when (and (eq (cdr type) 'score)
5891                      gnus-save-score
5892                      list)
5893             (let* ((arts list)
5894                    (prev (cons nil list))
5895                    (all prev))
5896               (while arts
5897                 (if (or (not (consp (car arts)))
5898                         (= (cdar arts) gnus-summary-default-score))
5899                     (setcdr prev (cdr arts))
5900                   (setq prev arts))
5901                 (setq arts (cdr arts)))
5902               (setq list (cdr all)))))
5903
5904         (when (eq (cdr type) 'seen)
5905           (setq list (gnus-range-add list gnus-newsgroup-unseen)))
5906
5907         (when (eq (gnus-article-mark-to-type (cdr type)) 'list)
5908           (setq list (gnus-compress-sequence (set symbol (sort list '<)) t)))
5909
5910         (when (and (gnus-check-backend-function
5911                     'request-set-mark gnus-newsgroup-name)
5912                    (not (gnus-article-unpropagatable-p (cdr type))))
5913           (let* ((old (cdr (assq (cdr type) (gnus-info-marks info))))
5914                  (del (gnus-remove-from-range (gnus-copy-sequence old) list))
5915                  (add (gnus-remove-from-range
5916                        (gnus-copy-sequence list) old)))
5917             (when add
5918               (push (list add 'add (list (cdr type))) delta-marks))
5919             (when del
5920               (push (list del 'del (list (cdr type))) delta-marks))))
5921
5922         (when list
5923           (push (cons (cdr type) list) newmarked)))
5924
5925       (when delta-marks
5926         (unless (gnus-check-group gnus-newsgroup-name)
5927           (error "Can't open server for %s" gnus-newsgroup-name))
5928         (gnus-request-set-mark gnus-newsgroup-name delta-marks))
5929
5930       ;; Enter these new marks into the info of the group.
5931       (if (nthcdr 3 info)
5932           (setcar (nthcdr 3 info) newmarked)
5933         ;; Add the marks lists to the end of the info.
5934         (when newmarked
5935           (setcdr (nthcdr 2 info) (list newmarked))))
5936
5937       ;; Cut off the end of the info if there's nothing else there.
5938       (let ((i 5))
5939         (while (and (> i 2)
5940                     (not (nth i info)))
5941           (when (nthcdr (decf i) info)
5942             (setcdr (nthcdr i info) nil)))))))
5943
5944 (defun gnus-set-mode-line (where)
5945   "Set the mode line of the article or summary buffers.
5946 If WHERE is `summary', the summary mode line format will be used."
5947   ;; Is this mode line one we keep updated?
5948   (when (and (memq where gnus-updated-mode-lines)
5949              (symbol-value
5950               (intern (format "gnus-%s-mode-line-format-spec" where))))
5951     (let (mode-string)
5952       ;; We evaluate this in the summary buffer since these
5953       ;; variables are buffer-local to that buffer.
5954       (with-current-buffer gnus-summary-buffer
5955         ;; We bind all these variables that are used in the `eval' form
5956         ;; below.
5957         (let* ((mformat (symbol-value
5958                          (intern
5959                           (format "gnus-%s-mode-line-format-spec" where))))
5960                (gnus-tmp-group-name (gnus-mode-string-quote
5961                                      (gnus-group-decoded-name
5962                                       gnus-newsgroup-name)))
5963                (gnus-tmp-article-number (or gnus-current-article 0))
5964                (gnus-tmp-unread gnus-newsgroup-unreads)
5965                (gnus-tmp-unread-and-unticked (length gnus-newsgroup-unreads))
5966                (gnus-tmp-unselected (length gnus-newsgroup-unselected))
5967                (gnus-tmp-unread-and-unselected
5968                 (cond ((and (zerop gnus-tmp-unread-and-unticked)
5969                             (zerop gnus-tmp-unselected))
5970                        "")
5971                       ((zerop gnus-tmp-unselected)
5972                        (format "{%d more}" gnus-tmp-unread-and-unticked))
5973                       (t (format "{%d(+%d) more}"
5974                                  gnus-tmp-unread-and-unticked
5975                                  gnus-tmp-unselected))))
5976                (gnus-tmp-subject
5977                 (if (and gnus-current-headers
5978                          (vectorp gnus-current-headers))
5979                     (gnus-mode-string-quote
5980                      (mail-header-subject gnus-current-headers))
5981                   ""))
5982                bufname-length max-len
5983                gnus-tmp-header) ;; passed as argument to any user-format-funcs
5984           (setq mode-string (eval mformat))
5985           (setq bufname-length (if (string-match "%b" mode-string)
5986                                    (- (length
5987                                        (buffer-name
5988                                         (if (eq where 'summary)
5989                                             nil
5990                                           (get-buffer gnus-article-buffer))))
5991                                       2)
5992                                  0))
5993           (setq max-len (max 4 (if gnus-mode-non-string-length
5994                                    (- (window-width)
5995                                       gnus-mode-non-string-length
5996                                       bufname-length)
5997                                  (length mode-string))))
5998           ;; We might have to chop a bit of the string off...
5999           (when (> (length mode-string) max-len)
6000             (setq mode-string
6001                   (concat (truncate-string-to-width mode-string (- max-len 3))
6002                           "...")))
6003           ;; Pad the mode string a bit.
6004           (setq mode-string (format (format "%%-%ds" max-len) mode-string))))
6005       ;; Update the mode line.
6006       (setq mode-line-buffer-identification
6007             (gnus-mode-line-buffer-identification (list mode-string)))
6008       (set-buffer-modified-p t))))
6009
6010 (defun gnus-create-xref-hashtb (from-newsgroup headers unreads)
6011   "Go through the HEADERS list and add all Xrefs to a hash table.
6012 The resulting hash table is returned, or nil if no Xrefs were found."
6013   (let* ((virtual (gnus-virtual-group-p from-newsgroup))
6014          (prefix (if virtual "" (gnus-group-real-prefix from-newsgroup)))
6015          (xref-hashtb (gnus-make-hashtable))
6016          start group entry number xrefs header)
6017     (while headers
6018       (setq header (pop headers))
6019       (when (and (setq xrefs (mail-header-xref header))
6020                  (not (memq (setq number (mail-header-number header))
6021                             unreads)))
6022         (setq start 0)
6023         (while (string-match "\\([^ ]+\\)[:/]\\([0-9]+\\)" xrefs start)
6024           (setq start (match-end 0))
6025           (setq group (if prefix
6026                           (concat prefix (substring xrefs (match-beginning 1)
6027                                                     (match-end 1)))
6028                         (substring xrefs (match-beginning 1) (match-end 1))))
6029           (setq number
6030                 (string-to-number (substring xrefs (match-beginning 2)
6031                                           (match-end 2))))
6032           (if (setq entry (gnus-gethash group xref-hashtb))
6033               (setcdr entry (cons number (cdr entry)))
6034             (gnus-sethash group (cons number nil) xref-hashtb)))))
6035     (and start xref-hashtb)))
6036
6037 (defun gnus-mark-xrefs-as-read (from-newsgroup headers unreads)
6038   "Look through all the headers and mark the Xrefs as read."
6039   (let ((virtual (gnus-virtual-group-p from-newsgroup))
6040         name info xref-hashtb idlist method nth4)
6041     (save-excursion
6042       (set-buffer gnus-group-buffer)
6043       (when (setq xref-hashtb
6044                   (gnus-create-xref-hashtb from-newsgroup headers unreads))
6045         (mapatoms
6046          (lambda (group)
6047            (unless (string= from-newsgroup (setq name (symbol-name group)))
6048              (setq idlist (symbol-value group))
6049              ;; Dead groups are not updated.
6050              (and (prog1
6051                       (setq info (gnus-get-info name))
6052                     (when (stringp (setq nth4 (gnus-info-method info)))
6053                       (setq nth4 (gnus-server-to-method nth4))))
6054                   ;; Only do the xrefs if the group has the same
6055                   ;; select method as the group we have just read.
6056                   (or (gnus-methods-equal-p
6057                        nth4 (gnus-find-method-for-group from-newsgroup))
6058                       virtual
6059                       (equal nth4 (setq method (gnus-find-method-for-group
6060                                                 from-newsgroup)))
6061                       (and (equal (car nth4) (car method))
6062                            (equal (nth 1 nth4) (nth 1 method))))
6063                   gnus-use-cross-reference
6064                   (or (not (eq gnus-use-cross-reference t))
6065                       virtual
6066                       ;; Only do cross-references on subscribed
6067                       ;; groups, if that is what is wanted.
6068                       (<= (gnus-info-level info) gnus-level-subscribed))
6069                   (gnus-group-make-articles-read name idlist))))
6070          xref-hashtb)))))
6071
6072 (defun gnus-compute-read-articles (group articles)
6073   (let* ((entry (gnus-group-entry group))
6074          (info (nth 2 entry))
6075          (active (gnus-active group))
6076          ninfo)
6077     (when entry
6078       ;; First peel off all invalid article numbers.
6079       (when active
6080         (let ((ids articles)
6081               id first)
6082           (while (setq id (pop ids))
6083             (when (and first (> id (cdr active)))
6084               ;; We'll end up in this situation in one particular
6085               ;; obscure situation.  If you re-scan a group and get
6086               ;; a new article that is cross-posted to a different
6087               ;; group that has not been re-scanned, you might get
6088               ;; crossposted article that has a higher number than
6089               ;; Gnus believes possible.  So we re-activate this
6090               ;; group as well.  This might mean doing the
6091               ;; crossposting thingy will *increase* the number
6092               ;; of articles in some groups.  Tsk, tsk.
6093               (setq active (or (gnus-activate-group group) active)))
6094             (when (or (> id (cdr active))
6095                       (< id (car active)))
6096               (setq articles (delq id articles))))))
6097       ;; If the read list is nil, we init it.
6098       (if (and active
6099                (null (gnus-info-read info))
6100                (> (car active) 1))
6101           (setq ninfo (cons 1 (1- (car active))))
6102         (setq ninfo (gnus-info-read info)))
6103       ;; Then we add the read articles to the range.
6104       (gnus-add-to-range
6105        ninfo (setq articles (sort articles '<))))))
6106
6107 (defun gnus-group-make-articles-read (group articles)
6108   "Update the info of GROUP to say that ARTICLES are read."
6109   (let* ((num 0)
6110          (entry (gnus-group-entry group))
6111          (info (nth 2 entry))
6112          (active (gnus-active group))
6113          range)
6114     (when entry
6115       (setq range (gnus-compute-read-articles group articles))
6116       (with-current-buffer gnus-group-buffer
6117         (gnus-undo-register
6118           `(progn
6119              (gnus-info-set-marks ',info ',(gnus-info-marks info) t)
6120              (gnus-info-set-read ',info ',(gnus-info-read info))
6121              (gnus-get-unread-articles-in-group ',info (gnus-active ,group))
6122              (gnus-request-set-mark ,group (list (list ',range 'del '(read))))
6123              (gnus-group-update-group ,group t))))
6124       ;; Add the read articles to the range.
6125       (gnus-info-set-read info range)
6126       (gnus-request-set-mark group (list (list range 'add '(read))))
6127       ;; Then we have to re-compute how many unread
6128       ;; articles there are in this group.
6129       (when active
6130         (cond
6131          ((not range)
6132           (setq num (- (1+ (cdr active)) (car active))))
6133          ((not (listp (cdr range)))
6134           (setq num (- (cdr active) (- (1+ (cdr range))
6135                                        (car range)))))
6136          (t
6137           (while range
6138             (if (numberp (car range))
6139                 (setq num (1+ num))
6140               (setq num (+ num (- (1+ (cdar range)) (caar range)))))
6141             (setq range (cdr range)))
6142           (setq num (- (cdr active) num))))
6143         ;; Update the number of unread articles.
6144         (setcar entry num)
6145         ;; Update the group buffer.
6146         (unless (gnus-ephemeral-group-p group)
6147           (gnus-group-update-group group t))))))
6148
6149 (defvar gnus-newsgroup-none-id 0)
6150
6151 (defun gnus-get-newsgroup-headers (&optional dependencies force-new)
6152   (let ((cur nntp-server-buffer)
6153         (dependencies
6154          (or dependencies
6155              (with-current-buffer gnus-summary-buffer
6156                gnus-newsgroup-dependencies)))
6157         headers id end ref number
6158         (mail-parse-charset gnus-newsgroup-charset)
6159         (mail-parse-ignored-charsets
6160          (save-current-buffer (condition-case nil
6161                                   (set-buffer gnus-summary-buffer)
6162                                 (error))
6163                               gnus-newsgroup-ignored-charsets)))
6164     (with-current-buffer nntp-server-buffer
6165       ;; Translate all TAB characters into SPACE characters.
6166       (subst-char-in-region (point-min) (point-max) ?\t ?  t)
6167       (subst-char-in-region (point-min) (point-max) ?\r ?  t)
6168       (ietf-drums-unfold-fws)
6169       (gnus-run-hooks 'gnus-parse-headers-hook)
6170       (let ((case-fold-search t)
6171             in-reply-to header p lines chars)
6172         (goto-char (point-min))
6173         ;; Search to the beginning of the next header.  Error messages
6174         ;; do not begin with 2 or 3.
6175         (while (re-search-forward "^[23][0-9]+ " nil t)
6176           (setq id nil
6177                 ref nil)
6178           ;; This implementation of this function, with nine
6179           ;; search-forwards instead of the one re-search-forward and
6180           ;; a case (which basically was the old function) is actually
6181           ;; about twice as fast, even though it looks messier.  You
6182           ;; can't have everything, I guess.  Speed and elegance
6183           ;; doesn't always go hand in hand.
6184           (setq
6185            header
6186            (vector
6187             ;; Number.
6188             (prog1
6189                 (setq number (read cur))
6190               (end-of-line)
6191               (setq p (point))
6192               (narrow-to-region (point)
6193                                 (or (and (search-forward "\n.\n" nil t)
6194                                          (- (point) 2))
6195                                     (point))))
6196             ;; Subject.
6197             (progn
6198               (goto-char p)
6199               (if (search-forward "\nsubject:" nil t)
6200                   (funcall gnus-decode-encoded-word-function
6201                            (nnheader-header-value))
6202                 "(none)"))
6203             ;; From.
6204             (progn
6205               (goto-char p)
6206               (if (search-forward "\nfrom:" nil t)
6207                   (funcall gnus-decode-encoded-address-function
6208                            (nnheader-header-value))
6209                 "(nobody)"))
6210             ;; Date.
6211             (progn
6212               (goto-char p)
6213               (if (search-forward "\ndate:" nil t)
6214                   (nnheader-header-value) ""))
6215             ;; Message-ID.
6216             (progn
6217               (goto-char p)
6218               (setq id (if (re-search-forward
6219                             "^message-id: *\\(<[^\n\t> ]+>\\)" nil t)
6220                            ;; We do it this way to make sure the Message-ID
6221                            ;; is (somewhat) syntactically valid.
6222                            (buffer-substring (match-beginning 1)
6223                                              (match-end 1))
6224                          ;; If there was no message-id, we just fake one
6225                          ;; to make subsequent routines simpler.
6226                          (nnheader-generate-fake-message-id number))))
6227             ;; References.
6228             (progn
6229               (goto-char p)
6230               (if (search-forward "\nreferences:" nil t)
6231                   (progn
6232                     (setq end (point))
6233                     (prog1
6234                         (nnheader-header-value)
6235                       (setq ref
6236                             (buffer-substring
6237                              (progn
6238                                (end-of-line)
6239                                (search-backward ">" end t)
6240                                (1+ (point)))
6241                              (progn
6242                                (search-backward "<" end t)
6243                                (point))))))
6244                 ;; Get the references from the in-reply-to header if there
6245                 ;; were no references and the in-reply-to header looks
6246                 ;; promising.
6247                 (if (and (search-forward "\nin-reply-to:" nil t)
6248                          (setq in-reply-to (nnheader-header-value))
6249                          (string-match "<[^>]+>" in-reply-to))
6250                     (let (ref2)
6251                       (setq ref (substring in-reply-to (match-beginning 0)
6252                                            (match-end 0)))
6253                       (while (string-match "<[^>]+>" in-reply-to (match-end 0))
6254                         (setq ref2 (substring in-reply-to (match-beginning 0)
6255                                               (match-end 0)))
6256                         (when (> (length ref2) (length ref))
6257                           (setq ref ref2)))
6258                       ref)
6259                   (setq ref nil))))
6260             ;; Chars.
6261             (progn
6262               (goto-char p)
6263               (if (search-forward "\nchars: " nil t)
6264                   (if (numberp (setq chars (ignore-errors (read cur))))
6265                       chars -1)
6266                 -1))
6267             ;; Lines.
6268             (progn
6269               (goto-char p)
6270               (if (search-forward "\nlines: " nil t)
6271                   (if (numberp (setq lines (ignore-errors (read cur))))
6272                       lines -1)
6273                 -1))
6274             ;; Xref.
6275             (progn
6276               (goto-char p)
6277               (and (search-forward "\nxref:" nil t)
6278                    (nnheader-header-value)))
6279             ;; Extra.
6280             (when gnus-extra-headers
6281               (let ((extra gnus-extra-headers)
6282                     out)
6283                 (while extra
6284                   (goto-char p)
6285                   (when (search-forward
6286                          (concat "\n" (symbol-name (car extra)) ":") nil t)
6287                     (push (cons (car extra) (nnheader-header-value))
6288                           out))
6289                   (pop extra))
6290                 out))))
6291           (when (equal id ref)
6292             (setq ref nil))
6293
6294           (when gnus-alter-header-function
6295             (funcall gnus-alter-header-function header)
6296             (setq id (mail-header-id header)
6297                   ref (gnus-parent-id (mail-header-references header))))
6298
6299           (when (setq header
6300                       (gnus-dependencies-add-header
6301                        header dependencies force-new))
6302             (push header headers))
6303           (goto-char (point-max))
6304           (widen))
6305         (nreverse headers)))))
6306
6307 ;; Goes through the xover lines and returns a list of vectors
6308 (defun gnus-get-newsgroup-headers-xover (sequence &optional
6309                                                   force-new dependencies
6310                                                   group also-fetch-heads)
6311   "Parse the news overview data in the server buffer.
6312 Return a list of headers that match SEQUENCE (see
6313 `nntp-retrieve-headers')."
6314   ;; Get the Xref when the users reads the articles since most/some
6315   ;; NNTP servers do not include Xrefs when using XOVER.
6316   (setq gnus-article-internal-prepare-hook '(gnus-article-get-xrefs))
6317   (let ((mail-parse-charset gnus-newsgroup-charset)
6318         (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets)
6319         (cur nntp-server-buffer)
6320         (dependencies (or dependencies gnus-newsgroup-dependencies))
6321         (allp (cond
6322                ((eq gnus-read-all-available-headers t)
6323                 t)
6324                ((and (stringp gnus-read-all-available-headers)
6325                      group)
6326                 (string-match gnus-read-all-available-headers group))
6327                (t
6328                 nil)))
6329         number headers header)
6330     (with-current-buffer nntp-server-buffer
6331       (subst-char-in-region (point-min) (point-max) ?\r ?  t)
6332       ;; Allow the user to mangle the headers before parsing them.
6333       (gnus-run-hooks 'gnus-parse-headers-hook)
6334       (goto-char (point-min))
6335       (gnus-parse-without-error
6336         (while (and (or sequence allp)
6337                     (not (eobp)))
6338           (setq number (read cur))
6339           (when (not allp)
6340             (while (and sequence
6341                         (< (car sequence) number))
6342               (setq sequence (cdr sequence))))
6343           (when (and (or allp
6344                          (and sequence
6345                               (eq number (car sequence))))
6346                      (progn
6347                        (setq sequence (cdr sequence))
6348                        (setq header (inline
6349                                       (gnus-nov-parse-line
6350                                        number dependencies force-new)))))
6351             (push header headers))
6352           (forward-line 1)))
6353       ;; A common bug in inn is that if you have posted an article and
6354       ;; then retrieves the active file, it will answer correctly --
6355       ;; the new article is included.  However, a NOV entry for the
6356       ;; article may not have been generated yet, so this may fail.
6357       ;; We work around this problem by retrieving the last few
6358       ;; headers using HEAD.
6359       (if (or (not also-fetch-heads)
6360               (not sequence))
6361           ;; We (probably) got all the headers.
6362           (nreverse headers)
6363         (let ((gnus-nov-is-evil t))
6364           (nconc
6365            (nreverse headers)
6366            (when (eq (gnus-retrieve-headers sequence group) 'headers)
6367              (gnus-get-newsgroup-headers))))))))
6368
6369 (defun gnus-article-get-xrefs ()
6370   "Fill in the Xref value in `gnus-current-headers', if necessary.
6371 This is meant to be called in `gnus-article-internal-prepare-hook'."
6372   (let ((headers (with-current-buffer gnus-summary-buffer
6373                    gnus-current-headers)))
6374     (or (not gnus-use-cross-reference)
6375         (not headers)
6376         (and (mail-header-xref headers)
6377              (not (string= (mail-header-xref headers) "")))
6378         (let ((case-fold-search t)
6379               xref)
6380           (save-restriction
6381             (nnheader-narrow-to-headers)
6382             (goto-char (point-min))
6383             (when (or (and (not (eobp))
6384                            (eq (downcase (char-after)) ?x)
6385                            (looking-at "Xref:"))
6386                       (search-forward "\nXref:" nil t))
6387               (goto-char (1+ (match-end 0)))
6388               (setq xref (buffer-substring (point) (point-at-eol)))
6389               (mail-header-set-xref headers xref)))))))
6390
6391 (defun gnus-summary-insert-subject (id &optional old-header use-old-header)
6392   "Find article ID and insert the summary line for that article.
6393 OLD-HEADER can either be a header or a line number to insert
6394 the subject line on."
6395   (let* ((line (and (numberp old-header) old-header))
6396          (old-header (and (vectorp old-header) old-header))
6397          (header (cond ((and old-header use-old-header)
6398                         old-header)
6399                        ((and (numberp id)
6400                              (gnus-number-to-header id))
6401                         (gnus-number-to-header id))
6402                        (t
6403                         (gnus-read-header id))))
6404          (number (and (numberp id) id))
6405          d)
6406     (when header
6407       ;; Rebuild the thread that this article is part of and go to the
6408       ;; article we have fetched.
6409       (when (and (not gnus-show-threads)
6410                  old-header)
6411         (when (and number
6412                    (setq d (gnus-data-find (mail-header-number old-header))))
6413           (goto-char (gnus-data-pos d))
6414           (gnus-data-remove
6415            number
6416            (- (point-at-bol)
6417               (prog1
6418                   (1+ (point-at-eol))
6419                 (gnus-delete-line))))))
6420       ;; Remove list identifiers from subject.
6421       (when gnus-list-identifiers
6422         (let ((gnus-newsgroup-headers (list header)))
6423           (gnus-summary-remove-list-identifiers)))
6424       (when old-header
6425         (mail-header-set-number header (mail-header-number old-header)))
6426       (setq gnus-newsgroup-sparse
6427             (delq (setq number (mail-header-number header))
6428                   gnus-newsgroup-sparse))
6429       (setq gnus-newsgroup-ancient (delq number gnus-newsgroup-ancient))
6430       (push number gnus-newsgroup-limit)
6431       (gnus-rebuild-thread (mail-header-id header) line)
6432       (gnus-summary-goto-subject number nil t))
6433     (when (and (numberp number)
6434                (> number 0))
6435       ;; We have to update the boundaries even if we can't fetch the
6436       ;; article if ID is a number -- so that the next `P' or `N'
6437       ;; command will fetch the previous (or next) article even
6438       ;; if the one we tried to fetch this time has been canceled.
6439       (when (> number gnus-newsgroup-end)
6440         (setq gnus-newsgroup-end number))
6441       (when (< number gnus-newsgroup-begin)
6442         (setq gnus-newsgroup-begin number))
6443       (setq gnus-newsgroup-unselected
6444             (delq number gnus-newsgroup-unselected)))
6445     ;; Report back a success?
6446     (and header (mail-header-number header))))
6447
6448 ;;; Process/prefix in the summary buffer
6449
6450 (defun gnus-summary-work-articles (n)
6451   "Return a list of articles to be worked upon.
6452 The prefix argument, the list of process marked articles, and the
6453 current article will be taken into consideration."
6454   (with-current-buffer gnus-summary-buffer
6455     (cond
6456      (n
6457       ;; A numerical prefix has been given.
6458       (setq n (prefix-numeric-value n))
6459       (let ((backward (< n 0))
6460             (n (abs (prefix-numeric-value n)))
6461             articles article)
6462         (save-excursion
6463           (while
6464               (and (> n 0)
6465                    (push (setq article (gnus-summary-article-number))
6466                          articles)
6467                    (if backward
6468                        (gnus-summary-find-prev nil article)
6469                      (gnus-summary-find-next nil article)))
6470             (decf n)))
6471         (nreverse articles)))
6472      ((and (gnus-region-active-p) (mark))
6473       (message "region active")
6474       ;; Work on the region between point and mark.
6475       (let ((max (max (point) (mark)))
6476             articles article)
6477         (save-excursion
6478           (goto-char (min (point) (mark)))
6479           (while
6480               (and
6481                (push (setq article (gnus-summary-article-number)) articles)
6482                (gnus-summary-find-next nil article)
6483                (< (point) max)))
6484           (nreverse articles))))
6485      (gnus-newsgroup-processable
6486       ;; There are process-marked articles present.
6487       ;; Save current state.
6488       (gnus-summary-save-process-mark)
6489       ;; Return the list.
6490       (reverse gnus-newsgroup-processable))
6491      (t
6492       ;; Just return the current article.
6493       (list (gnus-summary-article-number))))))
6494
6495 (defmacro gnus-summary-iterate (arg &rest forms)
6496   "Iterate over the process/prefixed articles and do FORMS.
6497 ARG is the interactive prefix given to the command.  FORMS will be
6498 executed with point over the summary line of the articles."
6499   (let ((articles (make-symbol "gnus-summary-iterate-articles")))
6500     `(let ((,articles (gnus-summary-work-articles ,arg)))
6501        (while ,articles
6502          (gnus-summary-goto-subject (car ,articles))
6503          ,@forms
6504          (pop ,articles)))))
6505
6506 (put 'gnus-summary-iterate 'lisp-indent-function 1)
6507 (put 'gnus-summary-iterate 'edebug-form-spec '(form body))
6508
6509 (defun gnus-summary-save-process-mark ()
6510   "Push the current set of process marked articles on the stack."
6511   (interactive)
6512   (push (copy-sequence gnus-newsgroup-processable)
6513         gnus-newsgroup-process-stack))
6514
6515 (defun gnus-summary-kill-process-mark ()
6516   "Push the current set of process marked articles on the stack and unmark."
6517   (interactive)
6518   (gnus-summary-save-process-mark)
6519   (gnus-summary-unmark-all-processable))
6520
6521 (defun gnus-summary-yank-process-mark ()
6522   "Pop the last process mark state off the stack and restore it."
6523   (interactive)
6524   (unless gnus-newsgroup-process-stack
6525     (error "Empty mark stack"))
6526   (gnus-summary-process-mark-set (pop gnus-newsgroup-process-stack)))
6527
6528 (defun gnus-summary-process-mark-set (set)
6529   "Make SET into the current process marked articles."
6530   (gnus-summary-unmark-all-processable)
6531   (mapc 'gnus-summary-set-process-mark set))
6532
6533 ;;; Searching and stuff
6534
6535 (defun gnus-summary-search-group (&optional backward use-level)
6536   "Search for next unread newsgroup.
6537 If optional argument BACKWARD is non-nil, search backward instead."
6538   (with-current-buffer gnus-group-buffer
6539     (when (gnus-group-search-forward
6540            backward nil (if use-level (gnus-group-group-level) nil))
6541       (gnus-group-group-name))))
6542
6543 (defun gnus-summary-best-group (&optional exclude-group)
6544   "Find the name of the best unread group.
6545 If EXCLUDE-GROUP, do not go to this group."
6546   (with-current-buffer gnus-group-buffer
6547     (save-excursion
6548       (gnus-group-best-unread-group exclude-group))))
6549
6550 (defun gnus-summary-find-next (&optional unread article backward)
6551   (if backward
6552       (gnus-summary-find-prev unread article)
6553     (let* ((dummy (gnus-summary-article-intangible-p))
6554            (article (or article (gnus-summary-article-number)))
6555            (data (gnus-data-find-list article))
6556            result)
6557       (when (and (not dummy)
6558                  (or (not gnus-summary-check-current)
6559                      (not unread)
6560                      (not (gnus-data-unread-p (car data)))))
6561         (setq data (cdr data)))
6562       (when (setq result
6563                   (if unread
6564                       (progn
6565                         (while data
6566                           (unless (memq (gnus-data-number (car data))
6567                                         (cond
6568                                          ((eq gnus-auto-goto-ignores
6569                                               'always-undownloaded)
6570                                           gnus-newsgroup-undownloaded)
6571                                          (gnus-plugged
6572                                           nil)
6573                                          ((eq gnus-auto-goto-ignores
6574                                               'unfetched)
6575                                           gnus-newsgroup-unfetched)
6576                                          ((eq gnus-auto-goto-ignores
6577                                               'undownloaded)
6578                                           gnus-newsgroup-undownloaded)))
6579                             (when (gnus-data-unread-p (car data))
6580                               (setq result (car data)
6581                                     data nil)))
6582                           (setq data (cdr data)))
6583                         result)
6584                     (car data)))
6585         (goto-char (gnus-data-pos result))
6586         (gnus-data-number result)))))
6587
6588 (defun gnus-summary-find-prev (&optional unread article)
6589   (let* ((eobp (eobp))
6590          (article (or article (gnus-summary-article-number)))
6591          (data (gnus-data-find-list article (gnus-data-list 'rev)))
6592          result)
6593     (when (and (not eobp)
6594                (or (not gnus-summary-check-current)
6595                    (not unread)
6596                    (not (gnus-data-unread-p (car data)))))
6597       (setq data (cdr data)))
6598     (when (setq result
6599                 (if unread
6600                     (progn
6601                       (while data
6602                         (unless (memq (gnus-data-number (car data))
6603                                       (cond
6604                                        ((eq gnus-auto-goto-ignores
6605                                             'always-undownloaded)
6606                                         gnus-newsgroup-undownloaded)
6607                                        (gnus-plugged
6608                                         nil)
6609                                        ((eq gnus-auto-goto-ignores
6610                                             'unfetched)
6611                                         gnus-newsgroup-unfetched)
6612                                        ((eq gnus-auto-goto-ignores
6613                                             'undownloaded)
6614                                         gnus-newsgroup-undownloaded)))
6615                           (when (gnus-data-unread-p (car data))
6616                             (setq result (car data)
6617                                   data nil)))
6618                         (setq data (cdr data)))
6619                       result)
6620                   (car data)))
6621       (goto-char (gnus-data-pos result))
6622       (gnus-data-number result))))
6623
6624 (defun gnus-summary-find-subject (subject &optional unread backward article)
6625   (let* ((simp-subject (gnus-simplify-subject-fully subject))
6626          (article (or article (gnus-summary-article-number)))
6627          (articles (gnus-data-list backward))
6628          (arts (gnus-data-find-list article articles))
6629          result)
6630     (when (or (not gnus-summary-check-current)
6631               (not unread)
6632               (not (gnus-data-unread-p (car arts))))
6633       (setq arts (cdr arts)))
6634     (while arts
6635       (and (or (not unread)
6636                (gnus-data-unread-p (car arts)))
6637            (vectorp (gnus-data-header (car arts)))
6638            (gnus-subject-equal
6639             simp-subject (mail-header-subject (gnus-data-header (car arts))) t)
6640            (setq result (car arts)
6641                  arts nil))
6642       (setq arts (cdr arts)))
6643     (and result
6644          (goto-char (gnus-data-pos result))
6645          (gnus-data-number result))))
6646
6647 (defun gnus-summary-search-forward (&optional unread subject backward)
6648   "Search forward for an article.
6649 If UNREAD, look for unread articles.  If SUBJECT, look for
6650 articles with that subject.  If BACKWARD, search backward instead."
6651   (cond (subject (gnus-summary-find-subject subject unread backward))
6652         (backward (gnus-summary-find-prev unread))
6653         (t (gnus-summary-find-next unread))))
6654
6655 (defun gnus-recenter (&optional n)
6656   "Center point in window and redisplay frame.
6657 Also do horizontal recentering."
6658   (interactive "P")
6659   (when (and gnus-auto-center-summary
6660              (not (eq gnus-auto-center-summary 'vertical)))
6661     (gnus-horizontal-recenter))
6662   (recenter n))
6663
6664 (defun gnus-summary-recenter ()
6665   "Center point in the summary window.
6666 If `gnus-auto-center-summary' is nil, or the article buffer isn't
6667 displayed, no centering will be performed."
6668   ;; Suggested by earle@mahendo.JPL.NASA.GOV (Greg Earle).
6669   ;; Recenter only when requested.  Suggested by popovich@park.cs.columbia.edu.
6670   (interactive)
6671   ;; The user has to want it.
6672   (when gnus-auto-center-summary
6673     (let* ((top (cond ((< (window-height) 4) 0)
6674                       ((< (window-height) 7) 1)
6675                       (t (if (numberp gnus-auto-center-summary)
6676                              gnus-auto-center-summary
6677                            (/ (1- (window-height)) 2)))))
6678            (height (1- (window-height)))
6679            (bottom (save-excursion (goto-char (point-max))
6680                                    (forward-line (- height))
6681                                    (point)))
6682            (window (get-buffer-window (current-buffer))))
6683       (when (get-buffer-window gnus-article-buffer)
6684         ;; Only do recentering when the article buffer is displayed,
6685         ;; Set the window start to either `bottom', which is the biggest
6686         ;; possible valid number, or the second line from the top,
6687         ;; whichever is the least.
6688         (let ((top-pos (save-excursion (forward-line (- top)) (point))))
6689           (if (> bottom top-pos)
6690               ;; Keep the second line from the top visible
6691               (set-window-start window top-pos)
6692             ;; Try to keep the bottom line visible; if it's partially
6693             ;; obscured, either scroll one more line to make it fully
6694             ;; visible, or revert to using TOP-POS.
6695             (save-excursion
6696               (goto-char (point-max))
6697               (forward-line -1)
6698               (let ((last-line-start (point)))
6699                 (goto-char bottom)
6700                 (set-window-start window (point) t)
6701                 (when (not (pos-visible-in-window-p last-line-start window))
6702                   (forward-line 1)
6703                   (set-window-start window (min (point) top-pos) t)))))))
6704       ;; Do horizontal recentering while we're at it.
6705       (when (and (get-buffer-window (current-buffer) t)
6706                  (not (eq gnus-auto-center-summary 'vertical)))
6707         (let ((selected (selected-window)))
6708           (select-window (get-buffer-window (current-buffer) t))
6709           (gnus-summary-position-point)
6710           (gnus-horizontal-recenter)
6711           (select-window selected))))))
6712
6713 (defun gnus-summary-jump-to-group (newsgroup)
6714   "Move point to NEWSGROUP in group mode buffer."
6715   ;; Keep update point of group mode buffer if visible.
6716   (if (eq (current-buffer) (get-buffer gnus-group-buffer))
6717       (save-window-excursion
6718         ;; Take care of tree window mode.
6719         (when (get-buffer-window gnus-group-buffer)
6720           (pop-to-buffer gnus-group-buffer))
6721         (gnus-group-jump-to-group newsgroup))
6722     (save-excursion
6723       ;; Take care of tree window mode.
6724       (if (get-buffer-window gnus-group-buffer 0)
6725           (pop-to-buffer gnus-group-buffer)
6726         (set-buffer gnus-group-buffer))
6727       (gnus-group-jump-to-group newsgroup))))
6728
6729 ;; This function returns a list of article numbers based on the
6730 ;; difference between the ranges of read articles in this group and
6731 ;; the range of active articles.
6732 (defun gnus-list-of-unread-articles (group)
6733   (let* ((read (gnus-info-read (gnus-get-info group)))
6734          (active (or (gnus-active group) (gnus-activate-group group)))
6735          (last (or (cdr active)
6736                    (error "Group %s couldn't be activated " group)))
6737          (bottom (if gnus-newsgroup-maximum-articles
6738                      (max (car active)
6739                           (- last gnus-newsgroup-maximum-articles -1))
6740                    (car active)))
6741          first nlast unread)
6742     ;; If none are read, then all are unread.
6743     (if (not read)
6744         (setq first bottom)
6745       ;; If the range of read articles is a single range, then the
6746       ;; first unread article is the article after the last read
6747       ;; article.  Sounds logical, doesn't it?
6748       (if (and (not (listp (cdr read)))
6749                (or (< (car read) bottom)
6750                    (progn (setq read (list read))
6751                           nil)))
6752           (setq first (max bottom (1+ (cdr read))))
6753         ;; `read' is a list of ranges.
6754         (when (/= (setq nlast (or (and (numberp (car read)) (car read))
6755                                   (caar read)))
6756                   1)
6757           (setq first bottom))
6758         (while read
6759           (when first
6760             (while (< first nlast)
6761               (setq unread (cons first unread)
6762                     first (1+ first))))
6763           (setq first (1+ (if (atom (car read)) (car read) (cdar read))))
6764           (setq nlast (if (atom (cadr read)) (cadr read) (caadr read)))
6765           (setq read (cdr read)))))
6766     ;; And add the last unread articles.
6767     (while (<= first last)
6768       (setq unread (cons first unread)
6769             first (1+ first)))
6770     ;; Return the list of unread articles.
6771     (delq 0 (nreverse unread))))
6772
6773 (defun gnus-list-of-read-articles (group)
6774   "Return a list of unread, unticked and non-dormant articles."
6775   (let* ((info (gnus-get-info group))
6776          (marked (gnus-info-marks info))
6777          (active (gnus-active group)))
6778     (and info active
6779          (gnus-list-range-difference
6780           (gnus-list-range-difference
6781            (gnus-sorted-complement
6782             (gnus-uncompress-range
6783              (if gnus-newsgroup-maximum-articles
6784                  (cons (max (car active)
6785                             (- (cdr active)
6786                                gnus-newsgroup-maximum-articles
6787                                -1))
6788                        (cdr active))
6789                active))
6790             (gnus-list-of-unread-articles group))
6791            (cdr (assq 'dormant marked)))
6792           (cdr (assq 'tick marked))))))
6793
6794 ;; This function returns a sequence of article numbers based on the
6795 ;; difference between the ranges of read articles in this group and
6796 ;; the range of active articles.
6797 (defun gnus-sequence-of-unread-articles (group)
6798   (let* ((read (gnus-info-read (gnus-get-info group)))
6799          (active (or (gnus-active group) (gnus-activate-group group)))
6800          (last (cdr active))
6801          (bottom (if gnus-newsgroup-maximum-articles
6802                      (max (car active)
6803                           (- last gnus-newsgroup-maximum-articles -1))
6804                    (car active)))
6805          first nlast unread)
6806     ;; If none are read, then all are unread.
6807     (if (not read)
6808         (setq first bottom)
6809       ;; If the range of read articles is a single range, then the
6810       ;; first unread article is the article after the last read
6811       ;; article.  Sounds logical, doesn't it?
6812       (if (and (not (listp (cdr read)))
6813                (or (< (car read) bottom)
6814                    (progn (setq read (list read))
6815                           nil)))
6816           (setq first (max bottom (1+ (cdr read))))
6817         ;; `read' is a list of ranges.
6818         (when (/= (setq nlast (or (and (numberp (car read)) (car read))
6819                                   (caar read)))
6820                   1)
6821           (setq first bottom))
6822         (while read
6823           (when first
6824             (push (cons first nlast) unread))
6825           (setq first (1+ (if (atom (car read)) (car read) (cdar read))))
6826           (setq nlast (if (atom (cadr read)) (cadr read) (caadr read)))
6827           (setq read (cdr read)))))
6828     ;; And add the last unread articles.
6829     (cond ((not (and first last))
6830            nil)
6831           ((< first last)
6832            (push (cons first last) unread))
6833           ((= first last)
6834            (push first unread)))
6835     ;; Return the sequence of unread articles.
6836     (delq 0 (nreverse unread))))
6837
6838 ;; Various summary commands
6839
6840 (defun gnus-summary-select-article-buffer ()
6841   "Reconfigure windows to show article buffer."
6842   (interactive)
6843   (if (not (gnus-buffer-live-p gnus-article-buffer))
6844       (error "There is no article buffer for this summary buffer")
6845     (gnus-configure-windows 'article)
6846     (select-window (get-buffer-window gnus-article-buffer))))
6847
6848 (defun gnus-summary-universal-argument (arg)
6849   "Perform any operation on all articles that are process/prefixed."
6850   (interactive "P")
6851   (let ((articles (gnus-summary-work-articles arg))
6852         func article)
6853     (if (eq
6854          (setq
6855           func
6856           (key-binding
6857            (read-key-sequence
6858             (substitute-command-keys
6859              "\\<gnus-summary-mode-map>\\[gnus-summary-universal-argument]"))))
6860          'undefined)
6861         (gnus-error 1 "Undefined key")
6862       (save-excursion
6863         (while articles
6864           (gnus-summary-goto-subject (setq article (pop articles)))
6865           (let (gnus-newsgroup-processable)
6866             (command-execute func))
6867           (gnus-summary-remove-process-mark article)))))
6868   (gnus-summary-position-point))
6869
6870 (defun gnus-summary-toggle-truncation (&optional arg)
6871   "Toggle truncation of summary lines.
6872 With ARG, turn line truncation on if ARG is positive."
6873   (interactive "P")
6874   (setq truncate-lines
6875         (if (null arg) (not truncate-lines)
6876           (> (prefix-numeric-value arg) 0)))
6877   (redraw-display))
6878
6879 (defun gnus-summary-find-for-reselect ()
6880   "Return the number of an article to stay on across a reselect.
6881 The current article is considered, then following articles, then previous
6882 articles.  An article is sought which is not cancelled and isn't a temporary
6883 insertion from another group.  If there's no such then return a dummy 0."
6884   (let (found)
6885     (dolist (rev '(nil t))
6886       (unless found      ; don't demand the reverse list if we don't need it
6887         (let ((data (gnus-data-find-list
6888                      (gnus-summary-article-number) (gnus-data-list rev))))
6889           (while (and data (not found))
6890             (if (and (< 0 (gnus-data-number (car data)))
6891                      (not (eq gnus-canceled-mark (gnus-data-mark (car data)))))
6892                 (setq found (gnus-data-number (car data))))
6893             (setq data (cdr data))))))
6894     (or found 0)))
6895
6896 (defun gnus-summary-reselect-current-group (&optional all rescan)
6897   "Exit and then reselect the current newsgroup.
6898 The prefix argument ALL means to select all articles."
6899   (interactive "P")
6900   (when (gnus-ephemeral-group-p gnus-newsgroup-name)
6901     (error "Ephemeral groups can't be reselected"))
6902   (let ((current-subject (gnus-summary-find-for-reselect))
6903         (group gnus-newsgroup-name))
6904     (setq gnus-newsgroup-begin nil)
6905     (gnus-summary-exit nil 'leave-hidden)
6906     ;; We have to adjust the point of group mode buffer because
6907     ;; point was moved to the next unread newsgroup by exiting.
6908     (gnus-summary-jump-to-group group)
6909     (when rescan
6910       (save-excursion
6911         (gnus-group-get-new-news-this-group 1)))
6912     (gnus-group-read-group all t)
6913     (gnus-summary-goto-subject current-subject nil t)))
6914
6915 (defun gnus-summary-rescan-group (&optional all)
6916   "Exit the newsgroup, ask for new articles, and select the newsgroup."
6917   (interactive "P")
6918   (gnus-summary-reselect-current-group all t))
6919
6920 (defun gnus-summary-update-info (&optional non-destructive)
6921   (save-excursion
6922     (let ((group gnus-newsgroup-name))
6923       (when group
6924         (when gnus-newsgroup-kill-headers
6925           (setq gnus-newsgroup-killed
6926                 (gnus-compress-sequence
6927                  (gnus-sorted-union
6928                   (gnus-list-range-intersection
6929                    gnus-newsgroup-unselected gnus-newsgroup-killed)
6930                   gnus-newsgroup-unreads)
6931                  t)))
6932         (unless (listp (cdr gnus-newsgroup-killed))
6933           (setq gnus-newsgroup-killed (list gnus-newsgroup-killed)))
6934         (let ((headers gnus-newsgroup-headers))
6935           ;; Set the new ranges of read articles.
6936           (with-current-buffer gnus-group-buffer
6937             (gnus-undo-force-boundary))
6938           (gnus-update-read-articles
6939            group (gnus-sorted-union
6940                   gnus-newsgroup-unreads gnus-newsgroup-unselected))
6941           ;; Set the current article marks.
6942           (let ((gnus-newsgroup-scored
6943                  (if (and (not gnus-save-score)
6944                           (not non-destructive))
6945                      nil
6946                    gnus-newsgroup-scored)))
6947             (save-excursion
6948               (gnus-update-marks)))
6949           ;; Do the cross-ref thing.
6950           (when gnus-use-cross-reference
6951             (gnus-mark-xrefs-as-read group headers gnus-newsgroup-unreads))
6952           ;; Do not switch windows but change the buffer to work.
6953           (set-buffer gnus-group-buffer)
6954           (unless (gnus-ephemeral-group-p group)
6955             (gnus-group-update-group group)))))))
6956
6957 (defun gnus-summary-save-newsrc (&optional force)
6958   "Save the current number of read/marked articles in the dribble buffer.
6959 The dribble buffer will then be saved.
6960 If FORCE (the prefix), also save the .newsrc file(s)."
6961   (interactive "P")
6962   (gnus-summary-update-info t)
6963   (if force
6964       (gnus-save-newsrc-file)
6965     (gnus-dribble-save)))
6966
6967 (declare-function gnus-cache-write-active "gnus-cache" (&optional force))
6968
6969 (defun gnus-summary-exit (&optional temporary leave-hidden)
6970   "Exit reading current newsgroup, and then return to group selection mode.
6971 `gnus-exit-group-hook' is called with no arguments if that value is non-nil."
6972   (interactive)
6973   (gnus-set-global-variables)
6974   (when (gnus-buffer-live-p gnus-article-buffer)
6975     (with-current-buffer gnus-article-buffer
6976       (mm-destroy-parts gnus-article-mime-handles)
6977       ;; Set it to nil for safety reason.
6978       (setq gnus-article-mime-handle-alist nil)
6979       (setq gnus-article-mime-handles nil)))
6980   (gnus-kill-save-kill-buffer)
6981   (gnus-async-halt-prefetch)
6982   (let* ((group gnus-newsgroup-name)
6983          (quit-config (gnus-group-quit-config gnus-newsgroup-name))
6984          (gnus-group-is-exiting-p t)
6985          (mode major-mode)
6986          (group-point nil)
6987          (buf (current-buffer)))
6988     (unless quit-config
6989       ;; Do adaptive scoring, and possibly save score files.
6990       (when gnus-newsgroup-adaptive
6991         (gnus-score-adaptive))
6992       (when gnus-use-scoring
6993         (gnus-score-save)))
6994     (gnus-run-hooks 'gnus-summary-prepare-exit-hook)
6995     ;; If we have several article buffers, we kill them at exit.
6996     (unless gnus-single-article-buffer
6997       (when (gnus-buffer-live-p gnus-article-buffer)
6998         (with-current-buffer gnus-article-buffer
6999           ;; Don't kill sticky article buffers
7000           (unless (eq major-mode 'gnus-sticky-article-mode)
7001             (gnus-kill-buffer gnus-article-buffer)
7002             (setq gnus-article-current nil))))
7003       (gnus-kill-buffer gnus-original-article-buffer))
7004     (when gnus-use-cache
7005       (gnus-cache-possibly-remove-articles)
7006       (gnus-cache-save-buffers))
7007     (gnus-async-prefetch-remove-group group)
7008     (when gnus-suppress-duplicates
7009       (gnus-dup-enter-articles))
7010     (when gnus-use-trees
7011       (gnus-tree-close group))
7012     (when gnus-use-cache
7013       (gnus-cache-write-active))
7014     ;; Remove entries for this group.
7015     (nnmail-purge-split-history (gnus-group-real-name group))
7016     ;; Make all changes in this group permanent.
7017     (unless quit-config
7018       (gnus-run-hooks 'gnus-exit-group-hook)
7019       (gnus-summary-update-info))
7020     (gnus-close-group group)
7021     ;; Make sure where we were, and go to next newsgroup.
7022     (set-buffer gnus-group-buffer)
7023     (unless quit-config
7024       (gnus-group-jump-to-group group))
7025     (gnus-run-hooks 'gnus-summary-exit-hook)
7026     (unless (or quit-config
7027                 (not gnus-summary-next-group-on-exit)
7028                 ;; If this group has disappeared from the summary
7029                 ;; buffer, don't skip forwards.
7030                 (not (string= group (gnus-group-group-name))))
7031       (gnus-group-next-unread-group 1))
7032     (setq group-point (point))
7033     (if temporary
7034         nil                             ;Nothing to do.
7035       (set-buffer buf)
7036       (if (not gnus-kill-summary-on-exit)
7037           (progn
7038             (gnus-deaden-summary)
7039             (setq mode nil))
7040         ;; We set all buffer-local variables to nil.  It is unclear why
7041         ;; this is needed, but if we don't, buffer-local variables are
7042         ;; not garbage-collected, it seems.  This would the lead to en
7043         ;; ever-growing Emacs.
7044         (gnus-summary-clear-local-variables)
7045         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
7046           (gnus-summary-clear-local-variables))
7047         (when (get-buffer gnus-article-buffer)
7048           (bury-buffer gnus-article-buffer))
7049         ;; Return to group mode buffer.
7050         (when (eq mode 'gnus-summary-mode)
7051           (gnus-kill-buffer buf)))
7052       (setq gnus-current-select-method gnus-select-method)
7053       (set-buffer gnus-group-buffer)
7054       (if quit-config
7055           (gnus-handle-ephemeral-exit quit-config)
7056         (goto-char group-point)
7057         ;; If gnus-group-buffer is already displayed, make sure we also move
7058         ;; the cursor in the window that displays it.
7059         (let ((win (get-buffer-window (current-buffer) 0)))
7060           (if win (set-window-point win (point))))
7061         (unless leave-hidden
7062           (gnus-configure-windows 'group 'force)))
7063       ;; Clear the current group name.
7064       (unless quit-config
7065         (setq gnus-newsgroup-name nil)))))
7066
7067 (defalias 'gnus-summary-quit 'gnus-summary-exit-no-update)
7068 (defun gnus-summary-exit-no-update (&optional no-questions)
7069   "Quit reading current newsgroup without updating read article info."
7070   (interactive)
7071   (let* ((group gnus-newsgroup-name)
7072          (gnus-group-is-exiting-p t)
7073          (gnus-group-is-exiting-without-update-p t)
7074          (quit-config (gnus-group-quit-config group)))
7075     (when (or no-questions
7076               gnus-expert-user
7077               (gnus-y-or-n-p "Discard changes to this group and exit? "))
7078       (gnus-async-halt-prefetch)
7079       (run-hooks 'gnus-summary-prepare-exit-hook)
7080       (when (gnus-buffer-live-p gnus-article-buffer)
7081         (with-current-buffer gnus-article-buffer
7082           (mm-destroy-parts gnus-article-mime-handles)
7083           ;; Set it to nil for safety reason.
7084           (setq gnus-article-mime-handle-alist nil)
7085           (setq gnus-article-mime-handles nil)))
7086       ;; If we have several article buffers, we kill them at exit.
7087       (unless gnus-single-article-buffer
7088         (gnus-kill-buffer gnus-article-buffer)
7089         (gnus-kill-buffer gnus-original-article-buffer)
7090         (setq gnus-article-current nil))
7091       (if (not gnus-kill-summary-on-exit)
7092           (gnus-deaden-summary)
7093         (gnus-close-group group)
7094         (gnus-summary-clear-local-variables)
7095         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
7096           (gnus-summary-clear-local-variables))
7097         (gnus-kill-buffer gnus-summary-buffer))
7098       (unless gnus-single-article-buffer
7099         (setq gnus-article-current nil))
7100       (when gnus-use-trees
7101         (gnus-tree-close group))
7102       (gnus-async-prefetch-remove-group group)
7103       (when (get-buffer gnus-article-buffer)
7104         (bury-buffer gnus-article-buffer))
7105       ;; Return to the group buffer.
7106       (gnus-configure-windows 'group 'force)
7107       ;; Clear the current group name.
7108       (setq gnus-newsgroup-name nil)
7109       (unless (gnus-ephemeral-group-p group)
7110         (gnus-group-update-group group))
7111       (when (equal (gnus-group-group-name) group)
7112         (gnus-group-next-unread-group 1))
7113       (when quit-config
7114         (gnus-handle-ephemeral-exit quit-config)))))
7115
7116 (defun gnus-handle-ephemeral-exit (quit-config)
7117   "Handle movement when leaving an ephemeral group.
7118 The state which existed when entering the ephemeral is reset."
7119   (if (not (buffer-name (car quit-config)))
7120       (gnus-configure-windows 'group 'force)
7121     (set-buffer (car quit-config))
7122     (cond ((eq major-mode 'gnus-summary-mode)
7123            (gnus-set-global-variables))
7124           ((eq major-mode 'gnus-article-mode)
7125            (save-current-buffer
7126              ;; The `gnus-summary-buffer' variable may point
7127              ;; to the old summary buffer when using a single
7128              ;; article buffer.
7129              (unless (gnus-buffer-live-p gnus-summary-buffer)
7130                (set-buffer gnus-group-buffer))
7131              (set-buffer gnus-summary-buffer)
7132              (gnus-set-global-variables))))
7133     (if (or (eq (cdr quit-config) 'article)
7134             (eq (cdr quit-config) 'pick))
7135         (if (and (boundp 'gnus-pick-mode) (symbol-value 'gnus-pick-mode))
7136             (gnus-configure-windows 'pick 'force)
7137           (gnus-configure-windows (cdr quit-config) 'force))
7138       (gnus-configure-windows (cdr quit-config) 'force))
7139     (when (eq major-mode 'gnus-summary-mode)
7140       (if (memq gnus-auto-select-on-ephemeral-exit '(next-noselect
7141                                                      next-unread-noselect))
7142           (when (zerop (cond ((eq gnus-auto-select-on-ephemeral-exit
7143                                   'next-noselect)
7144                               (gnus-summary-next-subject 1 nil t))
7145                              ((eq gnus-auto-select-on-ephemeral-exit
7146                                   'next-unread-noselect)
7147                               (gnus-summary-next-subject 1 t t))))
7148             ;; Hide the article buffer which displays the article different
7149             ;; from the one that the cursor points to in the summary buffer.
7150             (gnus-configure-windows 'summary 'force))
7151         (cond ((eq gnus-auto-select-on-ephemeral-exit 'next)
7152                (gnus-summary-next-subject 1))
7153               ((eq gnus-auto-select-on-ephemeral-exit 'next-unread)
7154                (gnus-summary-next-subject 1 t))))
7155       (gnus-summary-recenter)
7156       (gnus-summary-position-point))))
7157
7158 ;;; Dead summaries.
7159
7160 (defvar gnus-dead-summary-mode-map nil)
7161
7162 (unless gnus-dead-summary-mode-map
7163   (setq gnus-dead-summary-mode-map (make-keymap))
7164   (suppress-keymap gnus-dead-summary-mode-map)
7165   (substitute-key-definition
7166    'undefined 'gnus-summary-wake-up-the-dead gnus-dead-summary-mode-map)
7167   (dolist (key '("\C-d" "\r" "\177" [delete]))
7168     (define-key gnus-dead-summary-mode-map
7169       key 'gnus-summary-wake-up-the-dead))
7170   (dolist (key '("q" "Q"))
7171     (define-key gnus-dead-summary-mode-map key 'bury-buffer)))
7172
7173 (defvar gnus-dead-summary-mode nil
7174   "Minor mode for Gnus summary buffers.")
7175
7176 (defun gnus-dead-summary-mode (&optional arg)
7177   "Minor mode for Gnus summary buffers."
7178   (interactive "P")
7179   (when (eq major-mode 'gnus-summary-mode)
7180     (make-local-variable 'gnus-dead-summary-mode)
7181     (setq gnus-dead-summary-mode
7182           (if (null arg) (not gnus-dead-summary-mode)
7183             (> (prefix-numeric-value arg) 0)))
7184     (when gnus-dead-summary-mode
7185       (add-minor-mode
7186        'gnus-dead-summary-mode " Dead" gnus-dead-summary-mode-map))))
7187
7188 (defun gnus-deaden-summary ()
7189   "Make the current summary buffer into a dead summary buffer."
7190   ;; Kill any previous dead summary buffer.
7191   (when (and gnus-dead-summary
7192              (buffer-name gnus-dead-summary))
7193     (with-current-buffer gnus-dead-summary
7194       (when gnus-dead-summary-mode
7195         (kill-buffer (current-buffer)))))
7196   ;; Make this the current dead summary.
7197   (setq gnus-dead-summary (current-buffer))
7198   (gnus-dead-summary-mode 1)
7199   (let ((name (buffer-name)))
7200     (when (string-match "Summary" name)
7201       (rename-buffer
7202        (concat (substring name 0 (match-beginning 0)) "Dead "
7203                (substring name (match-beginning 0)))
7204        t)
7205       (bury-buffer))))
7206
7207 (defun gnus-kill-or-deaden-summary (buffer)
7208   "Kill or deaden the summary BUFFER."
7209   (save-excursion
7210     (when (and (buffer-name buffer)
7211                (not gnus-single-article-buffer))
7212       (with-current-buffer buffer
7213         (gnus-kill-buffer gnus-article-buffer)
7214         (gnus-kill-buffer gnus-original-article-buffer)))
7215     (cond
7216      ;; Kill the buffer.
7217      (gnus-kill-summary-on-exit
7218       (when (and gnus-use-trees
7219                  (gnus-buffer-exists-p buffer))
7220         (with-current-buffer buffer
7221           (gnus-tree-close gnus-newsgroup-name)))
7222       (gnus-kill-buffer buffer))
7223      ;; Deaden the buffer.
7224      ((gnus-buffer-exists-p buffer)
7225       (with-current-buffer buffer
7226         (gnus-deaden-summary))))))
7227
7228 (defun gnus-summary-wake-up-the-dead (&rest args)
7229   "Wake up the dead summary buffer."
7230   (interactive)
7231   (gnus-dead-summary-mode -1)
7232   (let ((name (buffer-name)))
7233     (when (string-match "Dead " name)
7234       (rename-buffer
7235        (concat (substring name 0 (match-beginning 0))
7236                (substring name (match-end 0)))
7237        t)))
7238   (gnus-message 3 "This dead summary is now alive again"))
7239
7240 ;; Suggested by Andrew Eskilsson <pi92ae@pt.hk-r.se>.
7241 (defun gnus-summary-fetch-faq (&optional faq-dir)
7242   "Fetch the FAQ for the current group.
7243 If FAQ-DIR (the prefix), prompt for a directory to search for the faq
7244 in."
7245   (interactive
7246    (list
7247     (when current-prefix-arg
7248       (completing-read
7249        "FAQ dir: " (and (listp gnus-group-faq-directory)
7250                         (mapcar 'list
7251                                 gnus-group-faq-directory))))))
7252   (let (gnus-faq-buffer)
7253     (when (setq gnus-faq-buffer
7254                 (gnus-group-fetch-faq gnus-newsgroup-name faq-dir))
7255       (gnus-configure-windows 'summary-faq))))
7256
7257 ;; Suggested by Per Abrahamsen <amanda@iesd.auc.dk>.
7258 (defun gnus-summary-describe-group (&optional force)
7259   "Describe the current newsgroup."
7260   (interactive "P")
7261   (gnus-group-describe-group force gnus-newsgroup-name))
7262
7263 (defun gnus-summary-describe-briefly ()
7264   "Describe summary mode commands briefly."
7265   (interactive)
7266   (gnus-message 6 (substitute-command-keys "\\<gnus-summary-mode-map>\\[gnus-summary-next-page]:Select  \\[gnus-summary-next-unread-article]:Forward  \\[gnus-summary-prev-unread-article]:Backward  \\[gnus-summary-exit]:Exit  \\[gnus-info-find-node]:Run Info        \\[gnus-summary-describe-briefly]:This help")))
7267
7268 ;; Walking around group mode buffer from summary mode.
7269
7270 (defun gnus-summary-next-group (&optional no-article target-group backward)
7271   "Exit current newsgroup and then select next unread newsgroup.
7272 If prefix argument NO-ARTICLE is non-nil, no article is selected
7273 initially.  If TARGET-GROUP, go to this group.  If BACKWARD, go to
7274 previous group instead."
7275   (interactive "P")
7276   ;; Stop pre-fetching.
7277   (gnus-async-halt-prefetch)
7278   (let ((current-group gnus-newsgroup-name)
7279         (current-buffer (current-buffer))
7280         entered)
7281     ;; First we semi-exit this group to update Xrefs and all variables.
7282     ;; We can't do a real exit, because the window conf must remain
7283     ;; the same in case the user is prompted for info, and we don't
7284     ;; want the window conf to change before that...
7285     (gnus-summary-exit t)
7286     (while (not entered)
7287       ;; Then we find what group we are supposed to enter.
7288       (set-buffer gnus-group-buffer)
7289       (gnus-group-jump-to-group current-group)
7290       (setq target-group
7291             (or target-group
7292                 (if (eq gnus-keep-same-level 'best)
7293                     (gnus-summary-best-group gnus-newsgroup-name)
7294                   (gnus-summary-search-group backward gnus-keep-same-level))))
7295       (if (not target-group)
7296           ;; There are no further groups, so we return to the group
7297           ;; buffer.
7298           (progn
7299             (gnus-message 5 "Returning to the group buffer")
7300             (setq entered t)
7301             (when (gnus-buffer-live-p current-buffer)
7302               (set-buffer current-buffer)
7303               (gnus-summary-exit))
7304             (gnus-run-hooks 'gnus-group-no-more-groups-hook))
7305         ;; We try to enter the target group.
7306         (gnus-group-jump-to-group target-group)
7307         (let ((unreads (gnus-group-group-unread)))
7308           (if (and (or (eq t unreads)
7309                        (and unreads (not (zerop unreads))))
7310                    (gnus-summary-read-group
7311                     target-group nil no-article
7312                     (and (buffer-name current-buffer) current-buffer)
7313                     nil backward))
7314               (setq entered t)
7315             (setq current-group target-group
7316                   target-group nil)))))))
7317
7318 (defun gnus-summary-prev-group (&optional no-article)
7319   "Exit current newsgroup and then select previous unread newsgroup.
7320 If prefix argument NO-ARTICLE is non-nil, no article is selected initially."
7321   (interactive "P")
7322   (gnus-summary-next-group no-article nil t))
7323
7324 ;; Walking around summary lines.
7325
7326 (defun gnus-summary-first-subject (&optional unread undownloaded unseen)
7327   "Go to the first subject satisfying any non-nil constraint.
7328 If UNREAD is non-nil, the article should be unread.
7329 If UNDOWNLOADED is non-nil, the article should be undownloaded.
7330 If UNSEEN is non-nil, the article should be unseen.
7331 Returns the article selected or nil if there are no matching articles."
7332   (interactive "P")
7333   (cond
7334    ;; Empty summary.
7335    ((null gnus-newsgroup-data)
7336     (gnus-message 3 "No articles in the group")
7337     nil)
7338    ;; Pick the first article.
7339    ((not (or unread undownloaded unseen))
7340     (goto-char (gnus-data-pos (car gnus-newsgroup-data)))
7341     (gnus-data-number (car gnus-newsgroup-data)))
7342    ;; Find the first unread article.
7343    (t
7344     (let ((data gnus-newsgroup-data))
7345       (while (and data
7346                   (let ((num (gnus-data-number (car data))))
7347                     (or (memq num gnus-newsgroup-unfetched)
7348                         (not (or (and unread
7349                                       (memq num gnus-newsgroup-unreads))
7350                                  (and undownloaded
7351                                       (memq num gnus-newsgroup-undownloaded))
7352                                  (and unseen
7353                                       (memq num gnus-newsgroup-unseen)))))))
7354         (setq data (cdr data)))
7355       (prog1
7356           (if data
7357               (progn
7358                 (goto-char (gnus-data-pos (car data)))
7359                 (gnus-data-number (car data)))
7360             (gnus-message 3 "No more%s articles"
7361                           (let* ((r (when unread " unread"))
7362                                  (d (when undownloaded " undownloaded"))
7363                                  (s (when unseen " unseen"))
7364                                  (l (delq nil (list r d s))))
7365                             (cond ((= 3 (length l))
7366                                    (concat r "," d ", or" s))
7367                                   ((= 2 (length l))
7368                                    (concat (car l) ", or" (cadr l)))
7369                                   ((= 1 (length l))
7370                                    (car l))
7371                                   (t
7372                                    ""))))
7373             nil
7374             )
7375         (gnus-summary-position-point))))))
7376
7377 (defun gnus-summary-next-subject (n &optional unread dont-display)
7378   "Go to next N'th summary line.
7379 If N is negative, go to the previous N'th subject line.
7380 If UNREAD is non-nil, only unread articles are selected.
7381 The difference between N and the actual number of steps taken is
7382 returned."
7383   (interactive "p")
7384   (let ((backward (< n 0))
7385         (n (abs n)))
7386     (while (and (> n 0)
7387                 (if backward
7388                     (gnus-summary-find-prev unread)
7389                   (gnus-summary-find-next unread)))
7390       (unless (zerop (setq n (1- n)))
7391         (gnus-summary-show-thread)))
7392     (when (/= 0 n)
7393       (gnus-message 7 "No more%s articles"
7394                     (if unread " unread" "")))
7395     (unless dont-display
7396       (gnus-summary-recenter)
7397       (gnus-summary-position-point))
7398     n))
7399
7400 (defun gnus-summary-next-unread-subject (n)
7401   "Go to next N'th unread summary line."
7402   (interactive "p")
7403   (gnus-summary-next-subject n t))
7404
7405 (defun gnus-summary-prev-subject (n &optional unread)
7406   "Go to previous N'th summary line.
7407 If optional argument UNREAD is non-nil, only unread article is selected."
7408   (interactive "p")
7409   (gnus-summary-next-subject (- n) unread))
7410
7411 (defun gnus-summary-prev-unread-subject (n)
7412   "Go to previous N'th unread summary line."
7413   (interactive "p")
7414   (gnus-summary-next-subject (- n) t))
7415
7416 (defun gnus-summary-goto-subjects (articles)
7417   "Insert the subject header for ARTICLES in the current buffer."
7418   (save-excursion
7419     (dolist (article articles)
7420       (gnus-summary-goto-subject article t)))
7421   (gnus-summary-limit (append articles gnus-newsgroup-limit))
7422   (gnus-summary-position-point))
7423
7424 (defun gnus-summary-goto-subject (article &optional force silent)
7425   "Go the subject line of ARTICLE.
7426 If FORCE, also allow jumping to articles not currently shown."
7427   (interactive "nArticle number: ")
7428   (unless (numberp article)
7429     (error "Article %s is not a number" article))
7430   (let ((b (point))
7431         (data (gnus-data-find article)))
7432     ;; We read in the article if we have to.
7433     (and (not data)
7434          force
7435          (gnus-summary-insert-subject
7436           article
7437           (if (or (numberp force) (vectorp force)) force)
7438           t)
7439          (setq data (gnus-data-find article)))
7440     (goto-char b)
7441     (if (not data)
7442         (progn
7443           (unless silent
7444             (gnus-message 3 "Can't find article %d" article))
7445           nil)
7446       (let ((pt (gnus-data-pos data)))
7447         (goto-char pt)
7448         (gnus-summary-set-article-display-arrow pt))
7449       (gnus-summary-position-point)
7450       article)))
7451
7452 ;; Walking around summary lines with displaying articles.
7453
7454 (defun gnus-summary-expand-window (&optional arg)
7455   "Make the summary buffer take up the entire Emacs frame.
7456 Given a prefix, will force an `article' buffer configuration."
7457   (interactive "P")
7458   (if arg
7459       (gnus-configure-windows 'article 'force)
7460     (gnus-configure-windows 'summary 'force)))
7461
7462 (defun gnus-summary-display-article (article &optional all-header)
7463   "Display ARTICLE in article buffer."
7464   (unless (and (gnus-buffer-live-p gnus-article-buffer)
7465                (with-current-buffer gnus-article-buffer
7466                  (eq major-mode 'gnus-article-mode)))
7467     (gnus-article-setup-buffer))
7468   (gnus-set-global-variables)
7469   (with-current-buffer gnus-article-buffer
7470     (setq gnus-article-charset gnus-newsgroup-charset)
7471     (setq gnus-article-ignored-charsets gnus-newsgroup-ignored-charsets)
7472     (mm-enable-multibyte))
7473   (if (null article)
7474       nil
7475     (prog1
7476         (if gnus-summary-display-article-function
7477             (funcall gnus-summary-display-article-function article all-header)
7478           (gnus-article-prepare article all-header))
7479       (gnus-run-hooks 'gnus-select-article-hook)
7480       (when (and gnus-current-article
7481                  (not (zerop gnus-current-article)))
7482         (gnus-summary-goto-subject gnus-current-article))
7483       (gnus-summary-recenter)
7484       (when (and gnus-use-trees gnus-show-threads)
7485         (gnus-possibly-generate-tree article)
7486         (gnus-highlight-selected-tree article))
7487       ;; Successfully display article.
7488       (gnus-article-set-window-start
7489        (cdr (assq article gnus-newsgroup-bookmarks))))))
7490
7491 (defun gnus-summary-select-article (&optional all-headers force pseudo article)
7492   "Select the current article.
7493 If ALL-HEADERS is non-nil, show all header fields.  If FORCE is
7494 non-nil, the article will be re-fetched even if it already present in
7495 the article buffer.  If PSEUDO is non-nil, pseudo-articles will also
7496 be displayed."
7497   ;; Make sure we are in the summary buffer to work around bbdb bug.
7498   (unless (eq major-mode 'gnus-summary-mode)
7499     (set-buffer gnus-summary-buffer))
7500   (let ((article (or article (gnus-summary-article-number)))
7501         (all-headers (not (not all-headers))) ;Must be t or nil.
7502         gnus-summary-display-article-function)
7503     (and (not pseudo)
7504          (gnus-summary-article-pseudo-p article)
7505          (error "This is a pseudo-article"))
7506     (with-current-buffer gnus-summary-buffer
7507       (if (or (and gnus-single-article-buffer
7508                    (or (null gnus-current-article)
7509                        (null gnus-article-current)
7510                        (null (get-buffer gnus-article-buffer))
7511                        (not (eq article (cdr gnus-article-current)))
7512                        (not (equal (car gnus-article-current)
7513                                    gnus-newsgroup-name))))
7514               (and (not gnus-single-article-buffer)
7515                    (or (null gnus-current-article)
7516                        (not (eq gnus-current-article article))))
7517               force)
7518           ;; The requested article is different from the current article.
7519           (progn
7520             (gnus-summary-display-article article all-headers)
7521             (when (gnus-buffer-live-p gnus-article-buffer)
7522               (with-current-buffer gnus-article-buffer
7523                 (if (not gnus-article-decoded-p) ;; a local variable
7524                     (mm-disable-multibyte))))
7525             (gnus-article-set-window-start
7526              (cdr (assq article gnus-newsgroup-bookmarks)))
7527             article)
7528         'old))))
7529
7530 (defun gnus-summary-force-verify-and-decrypt ()
7531   "Display buttons for signed/encrypted parts and verify/decrypt them."
7532   (interactive)
7533   (let ((mm-verify-option 'known)
7534         (mm-decrypt-option 'known)
7535         (gnus-article-emulate-mime t)
7536         (gnus-buttonized-mime-types (append (list "multipart/signed"
7537                                                   "multipart/encrypted")
7538                                             gnus-buttonized-mime-types)))
7539     (gnus-summary-select-article nil 'force)))
7540
7541 (defun gnus-summary-set-current-mark (&optional current-mark)
7542   "Obsolete function."
7543   nil)
7544
7545 (defun gnus-summary-next-article (&optional unread subject backward push)
7546   "Select the next article.
7547 If UNREAD, only unread articles are selected.
7548 If SUBJECT, only articles with SUBJECT are selected.
7549 If BACKWARD, the previous article is selected instead of the next."
7550   (interactive "P")
7551   ;; Make sure we are in the summary buffer.
7552   (unless (eq major-mode 'gnus-summary-mode)
7553     (set-buffer gnus-summary-buffer))
7554   (cond
7555    ;; Is there such an article?
7556    ((and (gnus-summary-search-forward unread subject backward)
7557          (or (gnus-summary-display-article (gnus-summary-article-number))
7558              (eq (gnus-summary-article-mark) gnus-canceled-mark)))
7559     (gnus-summary-position-point))
7560    ;; If not, we try the first unread, if that is wanted.
7561    ((and subject
7562          gnus-auto-select-same
7563          (gnus-summary-first-unread-article))
7564     (gnus-summary-position-point)
7565     (gnus-message 6 "Wrapped"))
7566    ;; Try to get next/previous article not displayed in this group.
7567    ((and gnus-auto-extend-newsgroup
7568          (not unread) (not subject))
7569     (gnus-summary-goto-article
7570      (if backward (1- gnus-newsgroup-begin) (1+ gnus-newsgroup-end))
7571      nil (count-lines (point-min) (point))))
7572    ;; Go to next/previous group.
7573    (t
7574     (unless (gnus-ephemeral-group-p gnus-newsgroup-name)
7575       (gnus-summary-jump-to-group gnus-newsgroup-name))
7576     (let ((cmd last-command-char)
7577           (point
7578            (with-current-buffer gnus-group-buffer
7579              (point)))
7580           (group
7581            (if (eq gnus-keep-same-level 'best)
7582                (gnus-summary-best-group gnus-newsgroup-name)
7583              (gnus-summary-search-group backward gnus-keep-same-level))))
7584       ;; For some reason, the group window gets selected.  We change
7585       ;; it back.
7586       (select-window (get-buffer-window (current-buffer)))
7587       ;; Select next unread newsgroup automagically.
7588       (cond
7589        ((or (not gnus-auto-select-next)
7590             (not cmd))
7591         (gnus-message 7 "No more%s articles" (if unread " unread" "")))
7592        ((or (eq gnus-auto-select-next 'quietly)
7593             (and (eq gnus-auto-select-next 'slightly-quietly)
7594                  push)
7595             (and (eq gnus-auto-select-next 'almost-quietly)
7596                  (gnus-summary-last-article-p)))
7597         ;; Select quietly.
7598         (if (gnus-ephemeral-group-p gnus-newsgroup-name)
7599             (gnus-summary-exit)
7600           (gnus-message 7 "No more%s articles (%s)..."
7601                         (if unread " unread" "")
7602                         (if group (concat "selecting " group)
7603                           "exiting"))
7604           (gnus-summary-next-group nil group backward)))
7605        (t
7606         (when (gnus-key-press-event-p last-input-event)
7607           (gnus-summary-walk-group-buffer
7608            gnus-newsgroup-name cmd unread backward point))))))))
7609
7610 (defun gnus-summary-walk-group-buffer (from-group cmd unread backward start)
7611   (let ((keystrokes '((?\C-n (gnus-group-next-unread-group 1))
7612                       (?\C-p (gnus-group-prev-unread-group 1))))
7613         (cursor-in-echo-area t)
7614         keve key group ended prompt)
7615     (with-current-buffer gnus-group-buffer
7616       (goto-char start)
7617       (setq group
7618             (if (eq gnus-keep-same-level 'best)
7619                 (gnus-summary-best-group gnus-newsgroup-name)
7620               (gnus-summary-search-group backward gnus-keep-same-level))))
7621     (while (not ended)
7622       (setq prompt
7623             (format
7624              "No more%s articles%s " (if unread " unread" "")
7625              (if (and group
7626                       (not (gnus-ephemeral-group-p gnus-newsgroup-name)))
7627                  (format " (Type %s for %s [%s])"
7628                          (single-key-description cmd)
7629                          (gnus-group-decoded-name group)
7630                          (gnus-group-unread group))
7631                (format " (Type %s to exit %s)"
7632                        (single-key-description cmd)
7633                        (gnus-group-decoded-name gnus-newsgroup-name)))))
7634       ;; Confirm auto selection.
7635       (setq key (car (setq keve (gnus-read-event-char prompt)))
7636             ended t)
7637       (cond
7638        ((assq key keystrokes)
7639         (let ((obuf (current-buffer)))
7640           (switch-to-buffer gnus-group-buffer)
7641           (when group
7642             (gnus-group-jump-to-group group))
7643           (eval (cadr (assq key keystrokes)))
7644           (setq group (gnus-group-group-name))
7645           (switch-to-buffer obuf))
7646         (setq ended nil))
7647        ((equal key cmd)
7648         (if (or (not group)
7649                 (gnus-ephemeral-group-p gnus-newsgroup-name))
7650             (gnus-summary-exit)
7651           (gnus-summary-next-group nil group backward)))
7652        (t
7653         (push (cdr keve) unread-command-events))))))
7654
7655 (defun gnus-summary-next-unread-article ()
7656   "Select unread article after current one."
7657   (interactive)
7658   (gnus-summary-next-article
7659    (or (not (eq gnus-summary-goto-unread 'never))
7660        (gnus-summary-last-article-p (gnus-summary-article-number)))
7661    (and gnus-auto-select-same
7662         (gnus-summary-article-subject))))
7663
7664 (defun gnus-summary-prev-article (&optional unread subject)
7665   "Select the article before the current one.
7666 If UNREAD is non-nil, only unread articles are selected."
7667   (interactive "P")
7668   (gnus-summary-next-article unread subject t))
7669
7670 (defun gnus-summary-prev-unread-article ()
7671   "Select unread article before current one."
7672   (interactive)
7673   (gnus-summary-prev-article
7674    (or (not (eq gnus-summary-goto-unread 'never))
7675        (gnus-summary-first-article-p (gnus-summary-article-number)))
7676    (and gnus-auto-select-same
7677         (gnus-summary-article-subject))))
7678
7679 (defun gnus-summary-next-page (&optional lines circular stop)
7680   "Show next page of the selected article.
7681 If at the end of the current article, select the next article.
7682 LINES says how many lines should be scrolled up.
7683
7684 If CIRCULAR is non-nil, go to the start of the article instead of
7685 selecting the next article when reaching the end of the current
7686 article.
7687
7688 If STOP is non-nil, just stop when reaching the end of the message.
7689
7690 Also see the variable `gnus-article-skip-boring'."
7691   (interactive "P")
7692   (setq gnus-summary-buffer (current-buffer))
7693   (gnus-set-global-variables)
7694   (let ((article (gnus-summary-article-number))
7695         (article-window (get-buffer-window gnus-article-buffer t))
7696         endp)
7697     ;; If the buffer is empty, we have no article.
7698     (unless article
7699       (error "No article to select"))
7700     (gnus-configure-windows 'article)
7701     (if (eq (cdr (assq article gnus-newsgroup-reads)) gnus-canceled-mark)
7702         (if (and (eq gnus-summary-goto-unread 'never)
7703                  (not (gnus-summary-last-article-p article)))
7704             (gnus-summary-next-article)
7705           (gnus-summary-next-unread-article))
7706       (if (or (null gnus-current-article)
7707               (null gnus-article-current)
7708               (/= article (cdr gnus-article-current))
7709               (not (equal (car gnus-article-current) gnus-newsgroup-name)))
7710           ;; Selected subject is different from current article's.
7711           (gnus-summary-display-article article)
7712         (when article-window
7713           (gnus-eval-in-buffer-window gnus-article-buffer
7714             (setq endp (or (gnus-article-next-page lines)
7715                            (gnus-article-only-boring-p))))
7716           (when endp
7717             (cond (stop
7718                    (gnus-message 3 "End of message"))
7719                   (circular
7720                    (gnus-summary-beginning-of-article))
7721                   (lines
7722                    (gnus-message 3 "End of message"))
7723                   ((null lines)
7724                    (if (and (eq gnus-summary-goto-unread 'never)
7725                             (not (gnus-summary-last-article-p article)))
7726                        (gnus-summary-next-article)
7727                      (gnus-summary-next-unread-article))))))))
7728     (gnus-summary-recenter)
7729     (gnus-summary-position-point)))
7730
7731 (defun gnus-summary-prev-page (&optional lines move)
7732   "Show previous page of selected article.
7733 Argument LINES specifies lines to be scrolled down.
7734 If MOVE, move to the previous unread article if point is at
7735 the beginning of the buffer."
7736   (interactive "P")
7737   (let ((article (gnus-summary-article-number))
7738         (article-window (get-buffer-window gnus-article-buffer t))
7739         endp)
7740     (gnus-configure-windows 'article)
7741     (if (or (null gnus-current-article)
7742             (null gnus-article-current)
7743             (/= article (cdr gnus-article-current))
7744             (not (equal (car gnus-article-current) gnus-newsgroup-name)))
7745         ;; Selected subject is different from current article's.
7746         (gnus-summary-display-article article)
7747       (gnus-summary-recenter)
7748       (when article-window
7749         (gnus-eval-in-buffer-window gnus-article-buffer
7750           (setq endp (gnus-article-prev-page lines)))
7751         (when (and move endp)
7752           (cond (lines
7753                  (gnus-message 3 "Beginning of message"))
7754                 ((null lines)
7755                  (if (and (eq gnus-summary-goto-unread 'never)
7756                           (not (gnus-summary-first-article-p article)))
7757                      (gnus-summary-prev-article)
7758                    (gnus-summary-prev-unread-article))))))))
7759   (gnus-summary-position-point))
7760
7761 (defun gnus-summary-prev-page-or-article (&optional lines)
7762   "Show previous page of selected article.
7763 Argument LINES specifies lines to be scrolled down.
7764 If at the beginning of the article, go to the next article."
7765   (interactive "P")
7766   (gnus-summary-prev-page lines t))
7767
7768 (defun gnus-summary-scroll-up (lines)
7769   "Scroll up (or down) one line current article.
7770 Argument LINES specifies lines to be scrolled up (or down if negative)."
7771   (interactive "p")
7772   (gnus-configure-windows 'article)
7773   (gnus-summary-show-thread)
7774   (when (eq (gnus-summary-select-article nil nil 'pseudo) 'old)
7775     (gnus-eval-in-buffer-window gnus-article-buffer
7776       (cond ((> lines 0)
7777              (when (gnus-article-next-page lines)
7778                (gnus-message 3 "End of message")))
7779             ((< lines 0)
7780              (gnus-article-prev-page (- lines))))))
7781   (gnus-summary-recenter)
7782   (gnus-summary-position-point))
7783
7784 (defun gnus-summary-scroll-down (lines)
7785   "Scroll down (or up) one line current article.
7786 Argument LINES specifies lines to be scrolled down (or up if negative)."
7787   (interactive "p")
7788   (gnus-summary-scroll-up (- lines)))
7789
7790 (defun gnus-summary-next-same-subject ()
7791   "Select next article which has the same subject as current one."
7792   (interactive)
7793   (gnus-summary-next-article nil (gnus-summary-article-subject)))
7794
7795 (defun gnus-summary-prev-same-subject ()
7796   "Select previous article which has the same subject as current one."
7797   (interactive)
7798   (gnus-summary-prev-article nil (gnus-summary-article-subject)))
7799
7800 (defun gnus-summary-next-unread-same-subject ()
7801   "Select next unread article which has the same subject as current one."
7802   (interactive)
7803   (gnus-summary-next-article t (gnus-summary-article-subject)))
7804
7805 (defun gnus-summary-prev-unread-same-subject ()
7806   "Select previous unread article which has the same subject as current one."
7807   (interactive)
7808   (gnus-summary-prev-article t (gnus-summary-article-subject)))
7809
7810 (defun gnus-summary-first-unread-article ()
7811   "Select the first unread article.
7812 Return nil if there are no unread articles."
7813   (interactive)
7814   (prog1
7815       (when (gnus-summary-first-subject t)
7816         (gnus-summary-show-thread)
7817         (gnus-summary-first-subject t)
7818         (gnus-summary-display-article (gnus-summary-article-number)))
7819     (gnus-summary-position-point)))
7820
7821 (defun gnus-summary-first-unread-subject ()
7822   "Place the point on the subject line of the first unread article.
7823 Return nil if there are no unread articles."
7824   (interactive)
7825   (prog1
7826       (when (gnus-summary-first-subject t)
7827         (gnus-summary-show-thread)
7828         (gnus-summary-first-subject t))
7829     (gnus-summary-position-point)))
7830
7831 (defun gnus-summary-first-unseen-subject ()
7832   "Place the point on the subject line of the first unseen article.
7833 Return nil if there are no unseen articles."
7834   (interactive)
7835   (prog1
7836       (when (gnus-summary-first-subject nil nil t)
7837         (gnus-summary-show-thread)
7838         (gnus-summary-first-subject nil nil t))
7839     (gnus-summary-position-point)))
7840
7841 (defun gnus-summary-first-unseen-or-unread-subject ()
7842   "Place the point on the subject line of the first unseen article or,
7843 if all article have been seen, on the subject line of the first unread
7844 article."
7845   (interactive)
7846   (prog1
7847       (unless (when (gnus-summary-first-subject nil nil t)
7848                 (gnus-summary-show-thread)
7849                 (gnus-summary-first-subject nil nil t))
7850         (when (gnus-summary-first-subject t)
7851           (gnus-summary-show-thread)
7852           (gnus-summary-first-subject t)))
7853     (gnus-summary-position-point)))
7854
7855 (defun gnus-summary-first-article ()
7856   "Select the first article.
7857 Return nil if there are no articles."
7858   (interactive)
7859   (prog1
7860       (when (gnus-summary-first-subject)
7861         (gnus-summary-show-thread)
7862         (gnus-summary-first-subject)
7863         (gnus-summary-display-article (gnus-summary-article-number)))
7864     (gnus-summary-position-point)))
7865
7866 (defun gnus-summary-best-unread-article (&optional arg)
7867   "Select the unread article with the highest score.
7868 If given a prefix argument, select the next unread article that has a
7869 score higher than the default score."
7870   (interactive "P")
7871   (let ((article (if arg
7872                      (gnus-summary-better-unread-subject)
7873                    (gnus-summary-best-unread-subject))))
7874     (if article
7875         (gnus-summary-goto-article article)
7876       (error "No unread articles"))))
7877
7878 (defun gnus-summary-best-unread-subject ()
7879   "Select the unread subject with the highest score."
7880   (interactive)
7881   (let ((best -1000000)
7882         (data gnus-newsgroup-data)
7883         article score)
7884     (while data
7885       (and (gnus-data-unread-p (car data))
7886            (> (setq score
7887                     (gnus-summary-article-score (gnus-data-number (car data))))
7888               best)
7889            (setq best score
7890                  article (gnus-data-number (car data))))
7891       (setq data (cdr data)))
7892     (when article
7893       (gnus-summary-goto-subject article))
7894     (gnus-summary-position-point)
7895     article))
7896
7897 (defun gnus-summary-better-unread-subject ()
7898   "Select the first unread subject that has a score over the default score."
7899   (interactive)
7900   (let ((data gnus-newsgroup-data)
7901         article score)
7902     (while (and (setq article (gnus-data-number (car data)))
7903                 (or (gnus-data-read-p (car data))
7904                     (not (> (gnus-summary-article-score article)
7905                             gnus-summary-default-score))))
7906       (setq data (cdr data)))
7907     (when article
7908       (gnus-summary-goto-subject article))
7909     (gnus-summary-position-point)
7910     article))
7911
7912 (defun gnus-summary-last-subject ()
7913   "Go to the last displayed subject line in the group."
7914   (let ((article (gnus-data-number (car (gnus-data-list t)))))
7915     (when article
7916       (gnus-summary-goto-subject article))))
7917
7918 (defun gnus-summary-goto-article (article &optional all-headers force)
7919   "Fetch ARTICLE (article number or Message-ID) and display it if it exists.
7920 If ALL-HEADERS is non-nil, no header lines are hidden.
7921 If FORCE, go to the article even if it isn't displayed.  If FORCE
7922 is a number, it is the line the article is to be displayed on."
7923   (interactive
7924    (list
7925     (completing-read
7926      "Article number or Message-ID: "
7927      (mapcar (lambda (number) (list (int-to-string number)))
7928              gnus-newsgroup-limit))
7929     current-prefix-arg
7930     t))
7931   (prog1
7932       (if (and (stringp article)
7933                (string-match "@\\|%40" article))
7934           (gnus-summary-refer-article article)
7935         (when (stringp article)
7936           (setq article (string-to-number article)))
7937         (if (gnus-summary-goto-subject article force)
7938             (gnus-summary-display-article article all-headers)
7939           (gnus-message 4 "Couldn't go to article %s" article) nil))
7940     (gnus-summary-position-point)))
7941
7942 (defun gnus-summary-goto-last-article ()
7943   "Go to the previously read article."
7944   (interactive)
7945   (prog1
7946       (when gnus-last-article
7947         (gnus-summary-goto-article gnus-last-article nil t))
7948     (gnus-summary-position-point)))
7949
7950 (defun gnus-summary-pop-article (number)
7951   "Pop one article off the history and go to the previous.
7952 NUMBER articles will be popped off."
7953   (interactive "p")
7954   (let (to)
7955     (setq gnus-newsgroup-history
7956           (cdr (setq to (nthcdr number gnus-newsgroup-history))))
7957     (if to
7958         (gnus-summary-goto-article (car to) nil t)
7959       (error "Article history empty")))
7960   (gnus-summary-position-point))
7961
7962 ;; Summary commands and functions for limiting the summary buffer.
7963
7964 (defun gnus-summary-limit-to-articles (n)
7965   "Limit the summary buffer to the next N articles.
7966 If not given a prefix, use the process marked articles instead."
7967   (interactive "P")
7968   (prog1
7969       (let ((articles (gnus-summary-work-articles n)))
7970         (setq gnus-newsgroup-processable nil)
7971         (gnus-summary-limit articles))
7972     (gnus-summary-position-point)))
7973
7974 (defun gnus-summary-pop-limit (&optional total)
7975   "Restore the previous limit.
7976 If given a prefix, remove all limits."
7977   (interactive "P")
7978   (when total
7979     (setq gnus-newsgroup-limits
7980           (list (mapcar (lambda (h) (mail-header-number h))
7981                         gnus-newsgroup-headers))))
7982   (unless gnus-newsgroup-limits
7983     (error "No limit to pop"))
7984   (prog1
7985       (gnus-summary-limit nil 'pop)
7986     (gnus-summary-position-point)))
7987
7988 (defun gnus-summary-limit-to-subject (subject &optional header not-matching)
7989   "Limit the summary buffer to articles that have subjects that match a regexp.
7990 If NOT-MATCHING, excluding articles that have subjects that match a regexp."
7991   (interactive
7992    (list (read-string (if current-prefix-arg
7993                           "Exclude subject (regexp): "
7994                         "Limit to subject (regexp): "))
7995          nil current-prefix-arg))
7996   (unless header
7997     (setq header "subject"))
7998   (when (not (equal "" subject))
7999     (prog1
8000         (let ((articles (gnus-summary-find-matching
8001                          (or header "subject") subject 'all nil nil
8002                          not-matching)))
8003           (unless articles
8004             (error "Found no matches for \"%s\"" subject))
8005           (gnus-summary-limit articles))
8006       (gnus-summary-position-point))))
8007
8008 (defun gnus-summary-limit-to-author (from &optional not-matching)
8009   "Limit the summary buffer to articles that have authors that match a regexp.
8010 If NOT-MATCHING, excluding articles that have authors that match a regexp."
8011   (interactive
8012    (list (read-string (if current-prefix-arg
8013                           "Exclude author (regexp): "
8014                         "Limit to author (regexp): "))
8015          current-prefix-arg))
8016   (gnus-summary-limit-to-subject from "from" not-matching))
8017
8018 (defun gnus-summary-limit-to-recipient (recipient &optional not-matching)
8019   "Limit the summary buffer to articles with the given RECIPIENT.
8020
8021 If NOT-MATCHING, exclude RECIPIENT.
8022
8023 To and Cc headers are checked.  You need to include them in
8024 `nnmail-extra-headers'."
8025   ;; Unlike `rmail-summary-by-recipients', doesn't include From.
8026   (interactive
8027    (list (read-string (format "%s recipient (regexp): "
8028                               (if current-prefix-arg "Exclude" "Limit to")))
8029          current-prefix-arg))
8030   (when (not (equal "" recipient))
8031     (prog1 (let* ((to
8032                    (if (memq 'To nnmail-extra-headers)
8033                        (gnus-summary-find-matching
8034                         (cons 'extra 'To) recipient 'all nil nil
8035                         not-matching)
8036                      (gnus-message
8037                       1 "`To' isn't present in `nnmail-extra-headers'")
8038                      (sit-for 1)
8039                      nil))
8040                   (cc
8041                    (if (memq 'Cc nnmail-extra-headers)
8042                        (gnus-summary-find-matching
8043                         (cons 'extra 'Cc) recipient 'all nil nil
8044                         not-matching)
8045                      (gnus-message
8046                       1 "`Cc' isn't present in `nnmail-extra-headers'")
8047                      (sit-for 1)
8048                      nil))
8049                   (articles
8050                    (if not-matching
8051                        ;; We need the numbers that are in both lists:
8052                        (mapcar (lambda (a)
8053                                  (and (memq a to) a))
8054                                cc)
8055                      (nconc to cc))))
8056              (unless articles
8057                (error "Found no matches for \"%s\"" recipient))
8058              (gnus-summary-limit articles))
8059       (gnus-summary-position-point))))
8060
8061 (defun gnus-summary-limit-to-address (address &optional not-matching)
8062   "Limit the summary buffer to articles with the given ADDRESS.
8063
8064 If NOT-MATCHING, exclude ADDRESS.
8065
8066 To, Cc and From headers are checked.  You need to include `To' and `Cc'
8067 in `nnmail-extra-headers'."
8068   (interactive
8069    (list (read-string (format "%s address (regexp): "
8070                               (if current-prefix-arg "Exclude" "Limit to")))
8071          current-prefix-arg))
8072   (when (not (equal "" address))
8073     (prog1 (let* ((to
8074                    (if (memq 'To nnmail-extra-headers)
8075                        (gnus-summary-find-matching
8076                         (cons 'extra 'To) address 'all nil nil
8077                         not-matching)
8078                      (gnus-message
8079                       1 "`To' isn't present in `nnmail-extra-headers'")
8080                      (sit-for 1)
8081                      t))
8082                   (cc
8083                    (if (memq 'Cc nnmail-extra-headers)
8084                        (gnus-summary-find-matching
8085                         (cons 'extra 'Cc) address 'all nil nil
8086                         not-matching)
8087                      (gnus-message
8088                       1 "`Cc' isn't present in `nnmail-extra-headers'")
8089                      (sit-for 1)
8090                      t))
8091                   (from
8092                    (gnus-summary-find-matching "from" address
8093                                                'all nil nil not-matching))
8094                   (articles
8095                    (if not-matching
8096                        ;; We need the numbers that are in all lists:
8097                        (if (eq cc t)
8098                            (if (eq to t)
8099                                from
8100                              (mapcar (lambda (a) (car (memq a from))) to))
8101                          (if (eq to t)
8102                              (mapcar (lambda (a) (car (memq a from))) cc)
8103                            (mapcar (lambda (a) (car (memq a from)))
8104                                    (mapcar (lambda (a) (car (memq a to)))
8105                                            cc))))
8106                      (nconc (if (eq to t) nil to)
8107                             (if (eq cc t) nil cc)
8108                             from))))
8109              (unless articles
8110                (error "Found no matches for \"%s\"" address))
8111              (gnus-summary-limit articles))
8112       (gnus-summary-position-point))))
8113
8114 (defun gnus-summary-limit-strange-charsets-predicate (header)
8115   (let ((string (concat (mail-header-subject header)
8116                         (mail-header-from header)))
8117         charset found)
8118     (dotimes (i (1- (length string)))
8119       (setq charset (format "%s" (char-charset (aref string (1+ i)))))
8120       (when (string-match "unicode\\|big\\|japanese" charset)
8121         (setq found t)))
8122     found))
8123
8124 (defun gnus-summary-limit-to-predicate (predicate)
8125   "Limit to articles where PREDICATE returns non-nil.
8126 PREDICATE will be called with the header structures of the
8127 articles."
8128   (let ((articles nil)
8129         (case-fold-search t))
8130     (dolist (header gnus-newsgroup-headers)
8131       (when (funcall predicate header)
8132         (push (mail-header-number header) articles)))
8133     (gnus-summary-limit (nreverse articles))))
8134
8135 (defun gnus-summary-limit-to-age (age &optional younger-p)
8136   "Limit the summary buffer to articles that are older than (or equal) AGE days.
8137 If YOUNGER-P (the prefix) is non-nil, limit the summary buffer to
8138 articles that are younger than AGE days."
8139   (interactive
8140    (let ((younger current-prefix-arg)
8141          (days-got nil)
8142          days)
8143      (while (not days-got)
8144        (setq days (if younger
8145                       (read-string "Limit to articles younger than (in days, older when negative): ")
8146                     (read-string
8147                      "Limit to articles older than (in days, younger when negative): ")))
8148        (when (> (length days) 0)
8149          (setq days (read days)))
8150        (if (numberp days)
8151            (progn
8152              (setq days-got t)
8153              (when (< days 0)
8154                (setq younger (not younger))
8155                (setq days (* days -1))))
8156          (message "Please enter a number.")
8157          (sleep-for 1)))
8158      (list days younger)))
8159   (prog1
8160       (let ((data gnus-newsgroup-data)
8161             (cutoff (days-to-time age))
8162             articles d date is-younger)
8163         (while (setq d (pop data))
8164           (when (and (vectorp (gnus-data-header d))
8165                      (setq date (mail-header-date (gnus-data-header d))))
8166             (setq is-younger (time-less-p
8167                               (time-since (condition-case ()
8168                                               (date-to-time date)
8169                                             (error '(0 0))))
8170                               cutoff))
8171             (when (if younger-p
8172                       is-younger
8173                     (not is-younger))
8174               (push (gnus-data-number d) articles))))
8175         (gnus-summary-limit (nreverse articles)))
8176     (gnus-summary-position-point)))
8177
8178 (defun gnus-summary-limit-to-extra (header regexp &optional not-matching)
8179   "Limit the summary buffer to articles that match an 'extra' header."
8180   (interactive
8181    (let ((header
8182           (intern
8183            (gnus-completing-read-with-default
8184             (symbol-name (car gnus-extra-headers))
8185             (if current-prefix-arg
8186                 "Exclude extra header"
8187               "Limit extra header")
8188             (mapcar (lambda (x)
8189                       (cons (symbol-name x) x))
8190                     gnus-extra-headers)
8191             nil
8192             t))))
8193      (list header
8194            (read-string (format "%s header %s (regexp): "
8195                                 (if current-prefix-arg "Exclude" "Limit to")
8196                                 header))
8197            current-prefix-arg)))
8198   (when (not (equal "" regexp))
8199     (prog1
8200         (let ((articles (gnus-summary-find-matching
8201                          (cons 'extra header) regexp 'all nil nil
8202                          not-matching)))
8203           (unless articles
8204             (error "Found no matches for \"%s\"" regexp))
8205           (gnus-summary-limit articles))
8206       (gnus-summary-position-point))))
8207
8208 (defun gnus-summary-limit-to-display-predicate ()
8209   "Limit the summary buffer to the predicated in the `display' group parameter."
8210   (interactive)
8211   (unless gnus-newsgroup-display
8212     (error "There is no `display' group parameter"))
8213   (let (articles)
8214     (dolist (number gnus-newsgroup-articles)
8215       (when (funcall gnus-newsgroup-display)
8216         (push number articles)))
8217     (gnus-summary-limit articles))
8218   (gnus-summary-position-point))
8219
8220 (defalias 'gnus-summary-delete-marked-as-read 'gnus-summary-limit-to-unread)
8221 (make-obsolete
8222  'gnus-summary-delete-marked-as-read 'gnus-summary-limit-to-unread)
8223
8224 (defun gnus-summary-limit-to-unread (&optional all)
8225   "Limit the summary buffer to articles that are not marked as read.
8226 If ALL is non-nil, limit strictly to unread articles."
8227   (interactive "P")
8228   (if all
8229       (gnus-summary-limit-to-marks (char-to-string gnus-unread-mark))
8230     (gnus-summary-limit-to-marks
8231      ;; Concat all the marks that say that an article is read and have
8232      ;; those removed.
8233      (list gnus-del-mark gnus-read-mark gnus-ancient-mark
8234            gnus-killed-mark gnus-spam-mark gnus-kill-file-mark
8235            gnus-low-score-mark gnus-expirable-mark
8236            gnus-canceled-mark gnus-catchup-mark gnus-sparse-mark
8237            gnus-duplicate-mark gnus-souped-mark)
8238      'reverse)))
8239
8240 (defun gnus-summary-limit-to-headers (match &optional reverse)
8241   "Limit the summary buffer to articles that have headers that match MATCH.
8242 If REVERSE (the prefix), limit to articles that don't match."
8243   (interactive "sMatch headers (regexp): \nP")
8244   (gnus-summary-limit-to-bodies match reverse t))
8245
8246 (defun gnus-summary-limit-to-bodies (match &optional reverse headersp)
8247   "Limit the summary buffer to articles that have bodies that match MATCH.
8248 If REVERSE (the prefix), limit to articles that don't match."
8249   (interactive "sMatch body (regexp): \nP")
8250   (let ((articles nil)
8251         (gnus-select-article-hook nil)  ;Disable hook.
8252         (gnus-article-prepare-hook nil)
8253         (gnus-use-article-prefetch nil)
8254         (gnus-keep-backlog nil)
8255         (gnus-break-pages nil)
8256         (gnus-summary-display-arrow nil)
8257         (gnus-updated-mode-lines nil)
8258         (gnus-auto-center-summary nil)
8259         (gnus-display-mime-function nil))
8260     (dolist (data gnus-newsgroup-data)
8261       (let (gnus-mark-article-hook)
8262         (gnus-summary-select-article t t nil (gnus-data-number data)))
8263       (save-excursion
8264         (set-buffer gnus-article-buffer)
8265         (article-goto-body)
8266         (let* ((case-fold-search t)
8267                (found (if headersp
8268                           (re-search-backward match nil t)
8269                         (re-search-forward match nil t))))
8270           (when (or (and found
8271                          (not reverse))
8272                     (and (not found)
8273                          reverse))
8274             (push (gnus-data-number data) articles)))))
8275     (if (not articles)
8276         (message "No messages matched")
8277       (gnus-summary-limit articles)))
8278   (gnus-summary-position-point))
8279
8280 (defun gnus-summary-limit-to-singletons (&optional threadsp)
8281   "Limit the summary buffer to articles that aren't part on any thread.
8282 If THREADSP (the prefix), limit to articles that are in threads."
8283   (interactive "P")
8284   (let ((articles nil)
8285         thread-articles
8286         threads)
8287     (dolist (thread gnus-newsgroup-threads)
8288       (if (stringp (car thread))
8289           (dolist (thread (cdr thread))
8290             (push thread threads))
8291         (push thread threads)))
8292     (dolist (thread threads)
8293       (setq thread-articles (gnus-articles-in-thread thread))
8294       (when (or (and threadsp
8295                      (> (length thread-articles) 1))
8296                 (and (not threadsp)
8297                      (= (length thread-articles) 1)))
8298         (setq articles (nconc thread-articles articles))))
8299     (if (not articles)
8300         (message "No messages matched")
8301       (gnus-summary-limit articles))
8302     (gnus-summary-position-point)))
8303
8304 (defun gnus-summary-limit-to-replied (&optional unreplied)
8305   "Limit the summary buffer to replied articles.
8306 If UNREPLIED (the prefix), limit to unreplied articles."
8307   (interactive "P")
8308   (if unreplied
8309       (gnus-summary-limit
8310        (gnus-set-difference gnus-newsgroup-articles
8311         gnus-newsgroup-replied))
8312     (gnus-summary-limit gnus-newsgroup-replied))
8313   (gnus-summary-position-point))
8314
8315 (defalias 'gnus-summary-delete-marked-with 'gnus-summary-limit-exclude-marks)
8316 (make-obsolete 'gnus-summary-delete-marked-with
8317                'gnus-summary-limit-exclude-marks)
8318
8319 (defun gnus-summary-limit-exclude-marks (marks &optional reverse)
8320   "Exclude articles that are marked with MARKS (e.g. \"DK\").
8321 If REVERSE, limit the summary buffer to articles that are marked
8322 with MARKS.  MARKS can either be a string of marks or a list of marks.
8323 Returns how many articles were removed."
8324   (interactive "sMarks: ")
8325   (gnus-summary-limit-to-marks marks t))
8326
8327 (defun gnus-summary-limit-to-marks (marks &optional reverse)
8328   "Limit the summary buffer to articles that are marked with MARKS (e.g. \"DK\").
8329 If REVERSE (the prefix), limit the summary buffer to articles that are
8330 not marked with MARKS.  MARKS can either be a string of marks or a
8331 list of marks.
8332 Returns how many articles were removed."
8333   (interactive "sMarks: \nP")
8334   (prog1
8335       (let ((data gnus-newsgroup-data)
8336             (marks (if (listp marks) marks
8337                      (append marks nil))) ; Transform to list.
8338             articles)
8339         (while data
8340           (when (if reverse (not (memq (gnus-data-mark (car data)) marks))
8341                   (memq (gnus-data-mark (car data)) marks))
8342             (push (gnus-data-number (car data)) articles))
8343           (setq data (cdr data)))
8344         (gnus-summary-limit articles))
8345     (gnus-summary-position-point)))
8346
8347 (defun gnus-summary-limit-to-score (score)
8348   "Limit to articles with score at or above SCORE."
8349   (interactive "NLimit to articles with score of at least: ")
8350   (let ((data gnus-newsgroup-data)
8351         articles)
8352     (while data
8353       (when (>= (gnus-summary-article-score (gnus-data-number (car data)))
8354                 score)
8355         (push (gnus-data-number (car data)) articles))
8356       (setq data (cdr data)))
8357     (prog1
8358         (gnus-summary-limit articles)
8359       (gnus-summary-position-point))))
8360
8361 (defun gnus-summary-limit-to-unseen ()
8362   "Limit to unseen articles."
8363   (interactive)
8364   (prog1
8365       (gnus-summary-limit gnus-newsgroup-unseen)
8366     (gnus-summary-position-point)))
8367
8368 (defun gnus-summary-limit-include-thread (id)
8369   "Display all the hidden articles that is in the thread with ID in it.
8370 When called interactively, ID is the Message-ID of the current
8371 article."
8372   (interactive (list (mail-header-id (gnus-summary-article-header))))
8373   (let ((articles (gnus-articles-in-thread
8374                    (gnus-id-to-thread (gnus-root-id id)))))
8375     (prog1
8376         (gnus-summary-limit (nconc articles gnus-newsgroup-limit))
8377       (gnus-summary-limit-include-matching-articles
8378        "subject"
8379        (regexp-quote (gnus-simplify-subject-re
8380                       (mail-header-subject (gnus-id-to-header id)))))
8381       (gnus-summary-position-point))))
8382
8383 (defun gnus-summary-limit-include-matching-articles (header regexp)
8384   "Display all the hidden articles that have HEADERs that match REGEXP."
8385   (interactive (list (read-string "Match on header: ")
8386                      (read-string "Regexp: ")))
8387   (let ((articles (gnus-find-matching-articles header regexp)))
8388     (prog1
8389         (gnus-summary-limit (nconc articles gnus-newsgroup-limit))
8390       (gnus-summary-position-point))))
8391
8392 (defun gnus-summary-insert-dormant-articles ()
8393   "Insert all the dormant articles for this group into the current buffer."
8394   (interactive)
8395   (let ((gnus-verbose (max 6 gnus-verbose)))
8396     (if (not gnus-newsgroup-dormant)
8397         (gnus-message 3 "No dormant articles for this group")
8398       (gnus-summary-goto-subjects gnus-newsgroup-dormant))))
8399
8400 (defun gnus-summary-insert-ticked-articles ()
8401   "Insert ticked articles for this group into the current buffer."
8402   (interactive)
8403   (let ((gnus-verbose (max 6 gnus-verbose)))
8404     (if (not gnus-newsgroup-marked)
8405         (gnus-message 3 "No ticked articles for this group")
8406       (gnus-summary-goto-subjects gnus-newsgroup-marked))))
8407
8408 (defun gnus-summary-limit-include-dormant ()
8409   "Display all the hidden articles that are marked as dormant.
8410 Note that this command only works on a subset of the articles currently
8411 fetched for this group."
8412   (interactive)
8413   (unless gnus-newsgroup-dormant
8414     (error "There are no dormant articles in this group"))
8415   (prog1
8416       (gnus-summary-limit (append gnus-newsgroup-dormant gnus-newsgroup-limit))
8417     (gnus-summary-position-point)))
8418
8419 (defun gnus-summary-limit-exclude-dormant ()
8420   "Hide all dormant articles."
8421   (interactive)
8422   (prog1
8423       (gnus-summary-limit-to-marks (list gnus-dormant-mark) 'reverse)
8424     (gnus-summary-position-point)))
8425
8426 (defun gnus-summary-limit-exclude-childless-dormant ()
8427   "Hide all dormant articles that have no children."
8428   (interactive)
8429   (let ((data (gnus-data-list t))
8430         articles d children)
8431     ;; Find all articles that are either not dormant or have
8432     ;; children.
8433     (while (setq d (pop data))
8434       (when (or (not (= (gnus-data-mark d) gnus-dormant-mark))
8435                 (and (setq children
8436                            (gnus-article-children (gnus-data-number d)))
8437                      (let (found)
8438                        (while children
8439                          (when (memq (car children) articles)
8440                            (setq children nil
8441                                  found t))
8442                          (pop children))
8443                        found)))
8444         (push (gnus-data-number d) articles)))
8445     ;; Do the limiting.
8446     (prog1
8447         (gnus-summary-limit articles)
8448       (gnus-summary-position-point))))
8449
8450 (defun gnus-summary-limit-mark-excluded-as-read (&optional all)
8451   "Mark all unread excluded articles as read.
8452 If ALL, mark even excluded ticked and dormants as read."
8453   (interactive "P")
8454   (setq gnus-newsgroup-limit (sort gnus-newsgroup-limit '<))
8455   (let ((articles (gnus-sorted-ndifference
8456                    (sort
8457                     (mapcar (lambda (h) (mail-header-number h))
8458                             gnus-newsgroup-headers)
8459                     '<)
8460                    gnus-newsgroup-limit))
8461         article)
8462     (setq gnus-newsgroup-unreads
8463           (gnus-sorted-intersection gnus-newsgroup-unreads
8464                                     gnus-newsgroup-limit))
8465     (if all
8466         (setq gnus-newsgroup-dormant nil
8467               gnus-newsgroup-marked nil
8468               gnus-newsgroup-reads
8469               (nconc
8470                (mapcar (lambda (n) (cons n gnus-catchup-mark)) articles)
8471                gnus-newsgroup-reads))
8472       (while (setq article (pop articles))
8473         (unless (or (memq article gnus-newsgroup-dormant)
8474                     (memq article gnus-newsgroup-marked))
8475           (push (cons article gnus-catchup-mark) gnus-newsgroup-reads))))))
8476
8477 (defun gnus-summary-limit (articles &optional pop)
8478   (if pop
8479       ;; We pop the previous limit off the stack and use that.
8480       (setq articles (car gnus-newsgroup-limits)
8481             gnus-newsgroup-limits (cdr gnus-newsgroup-limits))
8482     ;; We use the new limit, so we push the old limit on the stack.
8483     (push gnus-newsgroup-limit gnus-newsgroup-limits))
8484   ;; Set the limit.
8485   (setq gnus-newsgroup-limit articles)
8486   (let ((total (length gnus-newsgroup-data))
8487         (data (gnus-data-find-list (gnus-summary-article-number)))
8488         (gnus-summary-mark-below nil)   ; Inhibit this.
8489         found)
8490     ;; This will do all the work of generating the new summary buffer
8491     ;; according to the new limit.
8492     (gnus-summary-prepare)
8493     ;; Hide any threads, possibly.
8494     (gnus-summary-maybe-hide-threads)
8495     ;; Try to return to the article you were at, or one in the
8496     ;; neighborhood.
8497     (when data
8498       ;; We try to find some article after the current one.
8499       (while data
8500         (when (gnus-summary-goto-subject (gnus-data-number (car data)) nil t)
8501           (setq data nil
8502                 found t))
8503         (setq data (cdr data))))
8504     (unless found
8505       ;; If there is no data, that means that we were after the last
8506       ;; article.  The same goes when we can't find any articles
8507       ;; after the current one.
8508       (goto-char (point-max))
8509       (gnus-summary-find-prev))
8510     (gnus-set-mode-line 'summary)
8511     ;; We return how many articles were removed from the summary
8512     ;; buffer as a result of the new limit.
8513     (- total (length gnus-newsgroup-data))))
8514
8515 (defsubst gnus-invisible-cut-children (threads)
8516   (let ((num 0))
8517     (while threads
8518       (when (memq (mail-header-number (caar threads)) gnus-newsgroup-limit)
8519         (incf num))
8520       (pop threads))
8521     (< num 2)))
8522
8523 (defsubst gnus-cut-thread (thread)
8524   "Go forwards in the thread until we find an article that we want to display."
8525   (when (or (eq gnus-fetch-old-headers 'some)
8526             (eq gnus-fetch-old-headers 'invisible)
8527             (numberp gnus-fetch-old-headers)
8528             (eq gnus-build-sparse-threads 'some)
8529             (eq gnus-build-sparse-threads 'more))
8530     ;; Deal with old-fetched headers and sparse threads.
8531     (while (and
8532             thread
8533             (or
8534              (gnus-summary-article-sparse-p (mail-header-number (car thread)))
8535              (gnus-summary-article-ancient-p
8536               (mail-header-number (car thread))))
8537             (if (or (<= (length (cdr thread)) 1)
8538                     (eq gnus-fetch-old-headers 'invisible))
8539                 (setq gnus-newsgroup-limit
8540                       (delq (mail-header-number (car thread))
8541                             gnus-newsgroup-limit)
8542                       thread (cadr thread))
8543               (when (gnus-invisible-cut-children (cdr thread))
8544                 (let ((th (cdr thread)))
8545                   (while th
8546                     (if (memq (mail-header-number (caar th))
8547                               gnus-newsgroup-limit)
8548                         (setq thread (car th)
8549                               th nil)
8550                       (setq th (cdr th))))))))))
8551   thread)
8552
8553 (defun gnus-cut-threads (threads)
8554   "Cut off all uninteresting articles from the beginning of THREADS."
8555   (when (or (eq gnus-fetch-old-headers 'some)
8556             (eq gnus-fetch-old-headers 'invisible)
8557             (numberp gnus-fetch-old-headers)
8558             (eq gnus-build-sparse-threads 'some)
8559             (eq gnus-build-sparse-threads 'more))
8560     (let ((th threads))
8561       (while th
8562         (setcar th (gnus-cut-thread (car th)))
8563         (setq th (cdr th)))))
8564   ;; Remove nixed out threads.
8565   (delq nil threads))
8566
8567 (defun gnus-summary-initial-limit (&optional show-if-empty)
8568   "Figure out what the initial limit is supposed to be on group entry.
8569 This entails weeding out unwanted dormants, low-scored articles,
8570 fetch-old-headers verbiage, and so on."
8571   ;; Most groups have nothing to remove.
8572   (if (or gnus-inhibit-limiting
8573           (and (null gnus-newsgroup-dormant)
8574                (eq gnus-newsgroup-display 'gnus-not-ignore)
8575                (not (eq gnus-fetch-old-headers 'some))
8576                (not (numberp gnus-fetch-old-headers))
8577                (not (eq gnus-fetch-old-headers 'invisible))
8578                (null gnus-summary-expunge-below)
8579                (not (eq gnus-build-sparse-threads 'some))
8580                (not (eq gnus-build-sparse-threads 'more))
8581                (null gnus-thread-expunge-below)
8582                (not gnus-use-nocem)))
8583       ()                                ; Do nothing.
8584     (push gnus-newsgroup-limit gnus-newsgroup-limits)
8585     (setq gnus-newsgroup-limit nil)
8586     (mapatoms
8587      (lambda (node)
8588        (unless (car (symbol-value node))
8589          ;; These threads have no parents -- they are roots.
8590          (let ((nodes (cdr (symbol-value node)))
8591                thread)
8592            (while nodes
8593              (if (and gnus-thread-expunge-below
8594                       (< (gnus-thread-total-score (car nodes))
8595                          gnus-thread-expunge-below))
8596                  (gnus-expunge-thread (pop nodes))
8597                (setq thread (pop nodes))
8598                (gnus-summary-limit-children thread))))))
8599      gnus-newsgroup-dependencies)
8600     ;; If this limitation resulted in an empty group, we might
8601     ;; pop the previous limit and use it instead.
8602     (when (and (not gnus-newsgroup-limit)
8603                show-if-empty)
8604       (setq gnus-newsgroup-limit (pop gnus-newsgroup-limits)))
8605     gnus-newsgroup-limit))
8606
8607 (defun gnus-summary-limit-children (thread)
8608   "Return 1 if this subthread is visible and 0 if it is not."
8609   ;; First we get the number of visible children to this thread.  This
8610   ;; is done by recursing down the thread using this function, so this
8611   ;; will really go down to a leaf article first, before slowly
8612   ;; working its way up towards the root.
8613   (when thread
8614     (let* ((max-lisp-eval-depth (max 5000 max-lisp-eval-depth))
8615            (children
8616            (if (cdr thread)
8617                (apply '+ (mapcar 'gnus-summary-limit-children
8618                                  (cdr thread)))
8619              0))
8620           (number (mail-header-number (car thread)))
8621           score)
8622       (if (and
8623            (not (memq number gnus-newsgroup-marked))
8624            (or
8625             ;; If this article is dormant and has absolutely no visible
8626             ;; children, then this article isn't visible.
8627             (and (memq number gnus-newsgroup-dormant)
8628                  (zerop children))
8629             ;; If this is "fetch-old-headered" and there is no
8630             ;; visible children, then we don't want this article.
8631             (and (or (eq gnus-fetch-old-headers 'some)
8632                      (numberp gnus-fetch-old-headers))
8633                  (gnus-summary-article-ancient-p number)
8634                  (zerop children))
8635             ;; If this is "fetch-old-headered" and `invisible', then
8636             ;; we don't want this article.
8637             (and (eq gnus-fetch-old-headers 'invisible)
8638                  (gnus-summary-article-ancient-p number))
8639             ;; If this is a sparsely inserted article with no children,
8640             ;; we don't want it.
8641             (and (eq gnus-build-sparse-threads 'some)
8642                  (gnus-summary-article-sparse-p number)
8643                  (zerop children))
8644             ;; If we use expunging, and this article is really
8645             ;; low-scored, then we don't want this article.
8646             (when (and gnus-summary-expunge-below
8647                        (< (setq score
8648                                 (or (cdr (assq number gnus-newsgroup-scored))
8649                                     gnus-summary-default-score))
8650                           gnus-summary-expunge-below))
8651               ;; We increase the expunge-tally here, but that has
8652               ;; nothing to do with the limits, really.
8653               (incf gnus-newsgroup-expunged-tally)
8654               ;; We also mark as read here, if that's wanted.
8655               (when (and gnus-summary-mark-below
8656                          (< score gnus-summary-mark-below))
8657                 (setq gnus-newsgroup-unreads
8658                       (delq number gnus-newsgroup-unreads))
8659                 (if gnus-newsgroup-auto-expire
8660                     (push number gnus-newsgroup-expirable)
8661                   (push (cons number gnus-low-score-mark)
8662                         gnus-newsgroup-reads)))
8663               t)
8664             ;; Do the `display' group parameter.
8665             (and gnus-newsgroup-display
8666                  (not (funcall gnus-newsgroup-display)))
8667             ;; Check NoCeM things.
8668             (when (and gnus-use-nocem
8669                        (gnus-nocem-unwanted-article-p
8670                         (mail-header-id (car thread))))
8671               (setq gnus-newsgroup-unreads
8672                     (delq number gnus-newsgroup-unreads))
8673               t)))
8674           ;; Nope, invisible article.
8675           0
8676         ;; Ok, this article is to be visible, so we add it to the limit
8677         ;; and return 1.
8678         (push number gnus-newsgroup-limit)
8679         1))))
8680
8681 (defun gnus-expunge-thread (thread)
8682   "Mark all articles in THREAD as read."
8683   (let* ((number (mail-header-number (car thread))))
8684     (incf gnus-newsgroup-expunged-tally)
8685     ;; We also mark as read here, if that's wanted.
8686     (setq gnus-newsgroup-unreads
8687           (delq number gnus-newsgroup-unreads))
8688     (if gnus-newsgroup-auto-expire
8689         (push number gnus-newsgroup-expirable)
8690       (push (cons number gnus-low-score-mark)
8691             gnus-newsgroup-reads)))
8692   ;; Go recursively through all subthreads.
8693   (mapcar 'gnus-expunge-thread (cdr thread)))
8694
8695 ;; Summary article oriented commands
8696
8697 (defun gnus-summary-refer-parent-article (n)
8698   "Refer parent article N times.
8699 If N is negative, go to ancestor -N instead.
8700 The difference between N and the number of articles fetched is returned."
8701   (interactive "p")
8702   (let ((skip 1)
8703         error header ref)
8704     (when (not (natnump n))
8705       (setq skip (abs n)
8706             n 1))
8707     (while (and (> n 0)
8708                 (not error))
8709       (setq header (gnus-summary-article-header))
8710       (if (and (eq (mail-header-number header)
8711                    (cdr gnus-article-current))
8712                (equal gnus-newsgroup-name
8713                       (car gnus-article-current)))
8714           ;; If we try to find the parent of the currently
8715           ;; displayed article, then we take a look at the actual
8716           ;; References header, since this is slightly more
8717           ;; reliable than the References field we got from the
8718           ;; server.
8719           (with-current-buffer gnus-original-article-buffer
8720             (nnheader-narrow-to-headers)
8721             (unless (setq ref (message-fetch-field "references"))
8722               (when (setq ref (message-fetch-field "in-reply-to"))
8723                 (setq ref (gnus-extract-message-id-from-in-reply-to ref))))
8724             (widen))
8725         (setq ref
8726               ;; It's not the current article, so we take a bet on
8727               ;; the value we got from the server.
8728               (mail-header-references header)))
8729       (if (and ref
8730                (not (equal ref "")))
8731           (unless (gnus-summary-refer-article (gnus-parent-id ref skip))
8732             (gnus-message 1 "Couldn't find parent"))
8733         (gnus-message 1 "No references in article %d"
8734                       (gnus-summary-article-number))
8735         (setq error t))
8736       (decf n))
8737     (gnus-summary-position-point)
8738     n))
8739
8740 (defun gnus-summary-refer-references ()
8741   "Fetch all articles mentioned in the References header.
8742 Return the number of articles fetched."
8743   (interactive)
8744   (let ((ref (mail-header-references (gnus-summary-article-header)))
8745         (current (gnus-summary-article-number))
8746         (n 0))
8747     (if (or (not ref)
8748             (equal ref ""))
8749         (error "No References in the current article")
8750       ;; For each Message-ID in the References header...
8751       (while (string-match "<[^>]*>" ref)
8752         (incf n)
8753         ;; ... fetch that article.
8754         (gnus-summary-refer-article
8755          (prog1 (match-string 0 ref)
8756            (setq ref (substring ref (match-end 0))))))
8757       (gnus-summary-goto-subject current)
8758       (gnus-summary-position-point)
8759       n)))
8760
8761 (defun gnus-summary-refer-thread (&optional limit)
8762   "Fetch all articles in the current thread.
8763 If LIMIT (the numerical prefix), fetch that many old headers instead
8764 of what's specified by the `gnus-refer-thread-limit' variable."
8765   (interactive "P")
8766   (let ((id (mail-header-id (gnus-summary-article-header)))
8767         (limit (if limit (prefix-numeric-value limit)
8768                  gnus-refer-thread-limit)))
8769     (unless (eq gnus-fetch-old-headers 'invisible)
8770       (gnus-message 5 "Fetching headers for %s..." gnus-newsgroup-name)
8771       ;; Retrieve the headers and read them in.
8772       (if (eq (if (numberp limit)
8773                   (gnus-retrieve-headers
8774                    (list (min
8775                           (+ (mail-header-number
8776                               (gnus-summary-article-header))
8777                              limit)
8778                           gnus-newsgroup-end))
8779                    gnus-newsgroup-name (* limit 2))
8780                 ;; gnus-refer-thread-limit is t, i.e. fetch _all_
8781                 ;; headers.
8782                 (gnus-retrieve-headers (list gnus-newsgroup-end)
8783                                        gnus-newsgroup-name limit))
8784               'nov)
8785           (gnus-build-all-threads)
8786         (error "Can't fetch thread from back ends that don't support NOV"))
8787       (gnus-message 5 "Fetching headers for %s...done" gnus-newsgroup-name))
8788     (gnus-summary-limit-include-thread id)))
8789
8790 (defun gnus-summary-refer-article (message-id)
8791   "Fetch an article specified by MESSAGE-ID."
8792   (interactive "sMessage-ID: ")
8793   (when (and (stringp message-id)
8794              (not (zerop (length message-id))))
8795     (setq message-id (gnus-replace-in-string message-id " " ""))
8796     ;; Construct the correct Message-ID if necessary.
8797     ;; Suggested by tale@pawl.rpi.edu.
8798     (unless (string-match "^<" message-id)
8799       (setq message-id (concat "<" message-id)))
8800     (unless (string-match ">$" message-id)
8801       (setq message-id (concat message-id ">")))
8802     ;; People often post MIDs from URLs, so unhex it:
8803     (unless (string-match "@" message-id)
8804       (setq message-id (gnus-url-unhex-string message-id)))
8805     (let* ((header (gnus-id-to-header message-id))
8806            (sparse (and header
8807                         (gnus-summary-article-sparse-p
8808                          (mail-header-number header))
8809                         (memq (mail-header-number header)
8810                               gnus-newsgroup-limit)))
8811            number)
8812       (cond
8813        ;; If the article is present in the buffer we just go to it.
8814        ((and header
8815              (or (not (gnus-summary-article-sparse-p
8816                        (mail-header-number header)))
8817                  sparse))
8818         (prog1
8819             (gnus-summary-goto-article
8820              (mail-header-number header) nil t)
8821           (when sparse
8822             (gnus-summary-update-article (mail-header-number header)))))
8823        (t
8824         ;; We fetch the article.
8825         (catch 'found
8826           (dolist (gnus-override-method (gnus-refer-article-methods))
8827             (when (and (gnus-check-server gnus-override-method)
8828                        ;; Fetch the header,
8829                        (setq number (gnus-summary-insert-subject message-id)))
8830               ;; and display the article.
8831               (gnus-summary-select-article nil nil nil number)
8832               (throw 'found t)))
8833           (gnus-message 3 "Couldn't fetch article %s" message-id)))))))
8834
8835 (defun gnus-refer-article-methods ()
8836   "Return a list of referable methods."
8837   (cond
8838    ;; No method, so we default to current and native.
8839    ((null gnus-refer-article-method)
8840     (list gnus-current-select-method gnus-select-method))
8841    ;; Current.
8842    ((eq 'current gnus-refer-article-method)
8843     (list gnus-current-select-method))
8844    ;; List of select methods.
8845    ((not (and (symbolp (car gnus-refer-article-method))
8846               (assq (car gnus-refer-article-method) nnoo-definition-alist)))
8847     (let (out)
8848       (dolist (method gnus-refer-article-method)
8849         (push (if (eq 'current method)
8850                   gnus-current-select-method
8851                 method)
8852               out))
8853       (nreverse out)))
8854    ;; One single select method.
8855    (t
8856     (list gnus-refer-article-method))))
8857
8858 (defun gnus-summary-edit-parameters ()
8859   "Edit the group parameters of the current group."
8860   (interactive)
8861   (gnus-group-edit-group gnus-newsgroup-name 'params))
8862
8863 (defun gnus-summary-customize-parameters ()
8864   "Customize the group parameters of the current group."
8865   (interactive)
8866   (gnus-group-customize gnus-newsgroup-name))
8867
8868 (defun gnus-summary-enter-digest-group (&optional force)
8869   "Enter an nndoc group based on the current article.
8870 If FORCE, force a digest interpretation.  If not, try
8871 to guess what the document format is."
8872   (interactive "P")
8873   (let ((conf gnus-current-window-configuration))
8874     (save-window-excursion
8875       (save-excursion
8876         (let (gnus-article-prepare-hook
8877               gnus-display-mime-function
8878               gnus-break-pages)
8879           (gnus-summary-select-article))))
8880     (setq gnus-current-window-configuration conf)
8881     (let* ((name (format "%s-%d"
8882                          (gnus-group-prefixed-name
8883                           gnus-newsgroup-name (list 'nndoc ""))
8884                          (with-current-buffer gnus-summary-buffer
8885                            gnus-current-article)))
8886            (ogroup gnus-newsgroup-name)
8887            (params (append (gnus-info-params (gnus-get-info ogroup))
8888                            (list (cons 'to-group ogroup))
8889                            (list (cons 'parent-group ogroup))
8890                            (list (cons 'save-article-group ogroup))))
8891            (case-fold-search t)
8892            (buf (current-buffer))
8893            dig to-address)
8894       (with-current-buffer gnus-original-article-buffer
8895         ;; Have the digest group inherit the main mail address of
8896         ;; the parent article.
8897         (when (setq to-address (or (gnus-fetch-field "reply-to")
8898                                    (gnus-fetch-field "from")))
8899           (setq params
8900                 (append
8901                  (list (cons 'to-address
8902                              (funcall gnus-decode-encoded-address-function
8903                                       to-address))))))
8904         (setq dig (nnheader-set-temp-buffer " *gnus digest buffer*"))
8905         (insert-buffer-substring gnus-original-article-buffer)
8906         ;; Remove lines that may lead nndoc to misinterpret the
8907         ;; document type.
8908         (narrow-to-region
8909          (goto-char (point-min))
8910          (or (search-forward "\n\n" nil t) (point)))
8911         (goto-char (point-min))
8912         (delete-matching-lines "^Path:\\|^From ")
8913         (widen))
8914       (unwind-protect
8915           (if (let ((gnus-newsgroup-ephemeral-charset gnus-newsgroup-charset)
8916                     (gnus-newsgroup-ephemeral-ignored-charsets
8917                      gnus-newsgroup-ignored-charsets))
8918                 (gnus-group-read-ephemeral-group
8919                  name `(nndoc ,name (nndoc-address ,(get-buffer dig))
8920                               (nndoc-article-type
8921                                ,(if force 'mbox 'guess)))
8922                  t nil nil nil
8923                  `((adapt-file . ,(gnus-score-file-name gnus-newsgroup-name
8924                                                         "ADAPT")))))
8925               ;; Make all postings to this group go to the parent group.
8926               (nconc (gnus-info-params (gnus-get-info name))
8927                      params)
8928             ;; Couldn't select this doc group.
8929             (switch-to-buffer buf)
8930             (gnus-set-global-variables)
8931             (gnus-configure-windows 'summary)
8932             (gnus-message 3 "Article couldn't be entered?"))
8933         (kill-buffer dig)))))
8934
8935 (defun gnus-summary-read-document (n)
8936   "Open a new group based on the current article(s).
8937 This will allow you to read digests and other similar
8938 documents as newsgroups.
8939 Obeys the standard process/prefix convention."
8940   (interactive "P")
8941   (let* ((ogroup gnus-newsgroup-name)
8942          (params (append (gnus-info-params (gnus-get-info ogroup))
8943                          (list (cons 'to-group ogroup))))
8944          group egroup groups vgroup)
8945     (dolist (article (gnus-summary-work-articles n))
8946       (setq group (format "%s-%d" gnus-newsgroup-name article))
8947       (gnus-summary-remove-process-mark article)
8948       (when (gnus-summary-display-article article)
8949         (save-excursion
8950           (with-temp-buffer
8951             (insert-buffer-substring gnus-original-article-buffer)
8952             ;; Remove some headers that may lead nndoc to make
8953             ;; the wrong guess.
8954             (message-narrow-to-head)
8955             (goto-char (point-min))
8956             (delete-matching-lines "^Path:\\|^From ")
8957             (widen)
8958             (if (setq egroup
8959                       (gnus-group-read-ephemeral-group
8960                        group `(nndoc ,group (nndoc-address ,(current-buffer))
8961                                      (nndoc-article-type guess))
8962                        t nil t))
8963                 (progn
8964                   ;; Make all postings to this group go to the parent group.
8965                   (nconc (gnus-info-params (gnus-get-info egroup))
8966                          params)
8967                   (push egroup groups))
8968               ;; Couldn't select this doc group.
8969               (gnus-error 3 "Article couldn't be entered"))))))
8970     ;; Now we have selected all the documents.
8971     (cond
8972      ((not groups)
8973       (error "None of the articles could be interpreted as documents"))
8974      ((gnus-group-read-ephemeral-group
8975        (setq vgroup (format
8976                      "nnvirtual:%s-%s" gnus-newsgroup-name
8977                      (format-time-string "%Y%m%dT%H%M%S" (current-time))))
8978        `(nnvirtual ,vgroup (nnvirtual-component-groups ,groups))
8979        t
8980        (cons (current-buffer) 'summary)))
8981      (t
8982       (error "Couldn't select virtual nndoc group")))))
8983
8984 (defun gnus-summary-isearch-article (&optional regexp-p)
8985   "Do incremental search forward on the current article.
8986 If REGEXP-P (the prefix) is non-nil, do regexp isearch."
8987   (interactive "P")
8988   (gnus-summary-select-article)
8989   (gnus-configure-windows 'article)
8990   (gnus-eval-in-buffer-window gnus-article-buffer
8991     (save-restriction
8992       (widen)
8993       (isearch-forward regexp-p))))
8994
8995 (defun gnus-summary-repeat-search-article-forward ()
8996   "Repeat the previous search forwards."
8997   (interactive)
8998   (unless gnus-last-search-regexp
8999     (error "No previous search"))
9000   (gnus-summary-search-article-forward gnus-last-search-regexp))
9001
9002 (defun gnus-summary-repeat-search-article-backward ()
9003   "Repeat the previous search backwards."
9004   (interactive)
9005   (unless gnus-last-search-regexp
9006     (error "No previous search"))
9007   (gnus-summary-search-article-forward gnus-last-search-regexp t))
9008
9009 (defun gnus-summary-search-article-forward (regexp &optional backward)
9010   "Search for an article containing REGEXP forward.
9011 If BACKWARD, search backward instead."
9012   (interactive
9013    (list (read-string
9014           (format "Search article %s (regexp%s): "
9015                   (if current-prefix-arg "backward" "forward")
9016                   (if gnus-last-search-regexp
9017                       (concat ", default " gnus-last-search-regexp)
9018                     "")))
9019          current-prefix-arg))
9020   (if (string-equal regexp "")
9021       (setq regexp (or gnus-last-search-regexp ""))
9022     (setq gnus-last-search-regexp regexp)
9023     (setq gnus-article-before-search gnus-current-article))
9024   ;; Intentionally set gnus-last-article.
9025   (setq gnus-last-article gnus-article-before-search)
9026   (let ((gnus-last-article gnus-last-article))
9027     (if (gnus-summary-search-article regexp backward)
9028         (gnus-summary-show-thread)
9029       (signal 'search-failed (list regexp)))))
9030
9031 (defun gnus-summary-search-article-backward (regexp)
9032   "Search for an article containing REGEXP backward."
9033   (interactive
9034    (list (read-string
9035           (format "Search article backward (regexp%s): "
9036                   (if gnus-last-search-regexp
9037                       (concat ", default " gnus-last-search-regexp)
9038                     "")))))
9039   (gnus-summary-search-article-forward regexp 'backward))
9040
9041 (defun gnus-summary-search-article (regexp &optional backward)
9042   "Search for an article containing REGEXP.
9043 Optional argument BACKWARD means do search for backward.
9044 `gnus-select-article-hook' is not called during the search."
9045   ;; We have to require this here to make sure that the following
9046   ;; dynamic binding isn't shadowed by autoloading.
9047   (require 'gnus-async)
9048   (require 'gnus-art)
9049   (let ((gnus-select-article-hook nil)  ;Disable hook.
9050         (gnus-article-prepare-hook nil)
9051         (gnus-mark-article-hook nil)    ;Inhibit marking as read.
9052         (gnus-use-article-prefetch nil)
9053         (gnus-xmas-force-redisplay nil) ;Inhibit XEmacs redisplay.
9054         (gnus-use-trees nil)            ;Inhibit updating tree buffer.
9055         (gnus-visual nil)
9056         (gnus-keep-backlog nil)
9057         (gnus-break-pages nil)
9058         (gnus-summary-display-arrow nil)
9059         (gnus-updated-mode-lines nil)
9060         (gnus-auto-center-summary nil)
9061         (sum (current-buffer))
9062         (gnus-display-mime-function nil)
9063         (found nil)
9064         point)
9065     (gnus-save-hidden-threads
9066       (gnus-summary-select-article)
9067       (set-buffer gnus-article-buffer)
9068       (goto-char (window-point (get-buffer-window (current-buffer))))
9069       (when backward
9070         (forward-line -1))
9071       (while (not found)
9072         (gnus-message 7 "Searching article: %d..." (cdr gnus-article-current))
9073         (if (if backward
9074                 (re-search-backward regexp nil t)
9075               (re-search-forward regexp nil t))
9076             ;; We found the regexp.
9077             (progn
9078               (setq found 'found)
9079               (beginning-of-line)
9080               (set-window-start
9081                (get-buffer-window (current-buffer))
9082                (point))
9083               (forward-line 1)
9084               (set-window-point
9085                (get-buffer-window (current-buffer))
9086                (point))
9087               (set-buffer sum)
9088               (setq point (point)))
9089           ;; We didn't find it, so we go to the next article.
9090           (set-buffer sum)
9091           (setq found 'not)
9092           (while (eq found 'not)
9093             (if (not (if backward (gnus-summary-find-prev)
9094                        (gnus-summary-find-next)))
9095                 ;; No more articles.
9096                 (setq found t)
9097               ;; Select the next article and adjust point.
9098               (unless (gnus-summary-article-sparse-p
9099                        (gnus-summary-article-number))
9100                 (setq found nil)
9101                 (gnus-summary-select-article)
9102                 (set-buffer gnus-article-buffer)
9103                 (widen)
9104                 (goto-char (if backward (point-max) (point-min))))))))
9105       (gnus-message 7 ""))
9106     ;; Return whether we found the regexp.
9107     (when (eq found 'found)
9108       (goto-char point)
9109       (gnus-summary-show-thread)
9110       (gnus-summary-goto-subject gnus-current-article)
9111       (gnus-summary-position-point)
9112       t)))
9113
9114 (defun gnus-find-matching-articles (header regexp)
9115   "Return a list of all articles that match REGEXP on HEADER.
9116 This search includes all articles in the current group that Gnus has
9117 fetched headers for, whether they are displayed or not."
9118   (let ((articles nil)
9119         ;; Can't eta-reduce because it's a macro.
9120         (func `(lambda (h) (,(intern (concat "mail-header-" header)) h)))
9121         (case-fold-search t))
9122     (dolist (header gnus-newsgroup-headers)
9123       (when (string-match regexp (funcall func header))
9124         (push (mail-header-number header) articles)))
9125     (nreverse articles)))
9126
9127 (defun gnus-summary-find-matching (header regexp &optional backward unread
9128                                           not-case-fold not-matching)
9129   "Return a list of all articles that match REGEXP on HEADER.
9130 The search stars on the current article and goes forwards unless
9131 BACKWARD is non-nil.  If BACKWARD is `all', do all articles.
9132 If UNREAD is non-nil, only unread articles will
9133 be taken into consideration.  If NOT-CASE-FOLD, case won't be folded
9134 in the comparisons. If NOT-MATCHING, return a list of all articles that
9135 not match REGEXP on HEADER."
9136   (let ((case-fold-search (not not-case-fold))
9137         articles d func)
9138     (if (consp header)
9139         (if (eq (car header) 'extra)
9140             (setq func
9141                   `(lambda (h)
9142                      (or (cdr (assq ',(cdr header) (mail-header-extra h)))
9143                          "")))
9144           (error "%s is an invalid header" header))
9145       (unless (fboundp (intern (concat "mail-header-" header)))
9146         (error "%s is not a valid header" header))
9147       (setq func `(lambda (h) (,(intern (concat "mail-header-" header)) h))))
9148     (dolist (d (if (eq backward 'all)
9149                    gnus-newsgroup-data
9150                  (gnus-data-find-list
9151                   (gnus-summary-article-number)
9152                   (gnus-data-list backward))))
9153       (when (and (or (not unread)       ; We want all articles...
9154                      (gnus-data-unread-p d)) ; Or just unreads.
9155                  (vectorp (gnus-data-header d)) ; It's not a pseudo.
9156                  (if not-matching
9157                      (not (string-match
9158                            regexp
9159                            (funcall func (gnus-data-header d))))
9160                    (string-match regexp
9161                                  (funcall func (gnus-data-header d)))))
9162         (push (gnus-data-number d) articles))) ; Success!
9163     (nreverse articles)))
9164
9165 (defun gnus-summary-execute-command (header regexp command &optional backward)
9166   "Search forward for an article whose HEADER matches REGEXP and execute COMMAND.
9167 If HEADER is an empty string (or nil), the match is done on the entire
9168 article.  If BACKWARD (the prefix) is non-nil, search backward instead."
9169   (interactive
9170    (list (let ((completion-ignore-case t))
9171            (completing-read
9172             "Header name: "
9173             (mapcar (lambda (header) (list (format "%s" header)))
9174                     (append
9175                      '("Number" "Subject" "From" "Lines" "Date"
9176                        "Message-ID" "Xref" "References" "Body")
9177                      gnus-extra-headers))
9178             nil 'require-match))
9179          (read-string "Regexp: ")
9180          (read-key-sequence "Command: ")
9181          current-prefix-arg))
9182   (when (equal header "Body")
9183     (setq header ""))
9184   ;; Hidden thread subtrees must be searched as well.
9185   (gnus-summary-show-all-threads)
9186   ;; We don't want to change current point nor window configuration.
9187   (save-excursion
9188     (save-window-excursion
9189       (let (gnus-visual
9190             gnus-treat-strip-trailing-blank-lines
9191             gnus-treat-strip-leading-blank-lines
9192             gnus-treat-strip-multiple-blank-lines
9193             gnus-treat-hide-boring-headers
9194             gnus-treat-fold-newsgroups
9195             gnus-article-prepare-hook)
9196         (gnus-message 6 "Executing %s..." (key-description command))
9197         ;; We'd like to execute COMMAND interactively so as to give arguments.
9198         (gnus-execute header regexp
9199                       `(call-interactively ',(key-binding command))
9200                       backward)
9201         (gnus-message 6 "Executing %s...done" (key-description command))))))
9202
9203 (defun gnus-summary-beginning-of-article ()
9204   "Scroll the article back to the beginning."
9205   (interactive)
9206   (gnus-summary-select-article)
9207   (gnus-configure-windows 'article)
9208   (gnus-eval-in-buffer-window gnus-article-buffer
9209     (widen)
9210     (goto-char (point-min))
9211     (when gnus-break-pages
9212       (gnus-narrow-to-page))))
9213
9214 (defun gnus-summary-end-of-article ()
9215   "Scroll to the end of the article."
9216   (interactive)
9217   (gnus-summary-select-article)
9218   (gnus-configure-windows 'article)
9219   (gnus-eval-in-buffer-window gnus-article-buffer
9220     (widen)
9221     (goto-char (point-max))
9222     (recenter -3)
9223     (when gnus-break-pages
9224       (gnus-narrow-to-page))))
9225
9226 (defun gnus-summary-print-truncate-and-quote (string &optional len)
9227   "Truncate to LEN and quote all \"(\"'s in STRING."
9228   (gnus-replace-in-string (if (and len (> (length string) len))
9229                               (substring string 0 len)
9230                             string)
9231                           "[()]" "\\\\\\&"))
9232
9233 (defun gnus-summary-print-article (&optional filename n)
9234   "Generate and print a PostScript image of the process-marked (mail) articles.
9235
9236 If used interactively, print the current article if none are
9237 process-marked.  With prefix arg, prompt the user for the name of the
9238 file to save in.
9239
9240 When used from Lisp, accept two optional args FILENAME and N.  N means
9241 to print the next N articles.  If N is negative, print the N previous
9242 articles.  If N is nil and articles have been marked with the process
9243 mark, print these instead.
9244
9245 If the optional first argument FILENAME is nil, send the image to the
9246 printer.  If FILENAME is a string, save the PostScript image in a file with
9247 that name.  If FILENAME is a number, prompt the user for the name of the file
9248 to save in."
9249   (interactive (list (ps-print-preprint current-prefix-arg)))
9250   (dolist (article (gnus-summary-work-articles n))
9251     (gnus-summary-select-article nil nil 'pseudo article)
9252     (gnus-eval-in-buffer-window gnus-article-buffer
9253       (gnus-print-buffer))
9254     (gnus-summary-remove-process-mark article))
9255   (ps-despool filename))
9256
9257 (defun gnus-print-buffer ()
9258   (let ((buffer (generate-new-buffer " *print*")))
9259     (unwind-protect
9260         (progn
9261           (copy-to-buffer buffer (point-min) (point-max))
9262           (set-buffer buffer)
9263           (gnus-remove-text-with-property 'gnus-decoration)
9264           (when (gnus-visual-p 'article-highlight 'highlight)
9265             ;; Copy-to-buffer doesn't copy overlay.  So redo
9266             ;; highlight.
9267             (let ((gnus-article-buffer buffer))
9268               (gnus-article-highlight-citation t)
9269               (gnus-article-highlight-signature)
9270               (gnus-article-emphasize)
9271               (gnus-article-delete-invisible-text)))
9272           (let ((ps-left-header
9273                  (list
9274                   (concat "("
9275                           (gnus-summary-print-truncate-and-quote
9276                            (mail-header-subject gnus-current-headers)
9277                            66) ")")
9278                   (concat "("
9279                           (gnus-summary-print-truncate-and-quote
9280                            (mail-header-from gnus-current-headers)
9281                            45) ")")))
9282                 (ps-right-header
9283                  (list
9284                   "/pagenumberstring load"
9285                   (concat "("
9286                           (mail-header-date gnus-current-headers) ")"))))
9287             (gnus-run-hooks 'gnus-ps-print-hook)
9288             (save-excursion
9289               (if ps-print-color-p
9290                   (ps-spool-buffer-with-faces)
9291                 (ps-spool-buffer)))))
9292       (kill-buffer buffer))))
9293
9294 (defun gnus-summary-show-article (&optional arg)
9295   "Force redisplaying of the current article.
9296 If ARG (the prefix) is a number, show the article with the charset
9297 defined in `gnus-summary-show-article-charset-alist', or the charset
9298 input.
9299 If ARG (the prefix) is non-nil and not a number, show the raw article
9300 without any article massaging functions being run.  Normally, the key
9301 strokes are `C-u g'."
9302   (interactive "P")
9303   (cond
9304    ((numberp arg)
9305     (gnus-summary-show-article t)
9306     (let ((gnus-newsgroup-charset
9307            (or (cdr (assq arg gnus-summary-show-article-charset-alist))
9308                (mm-read-coding-system
9309                 "View as charset: " ;; actually it is coding system.
9310                 (with-current-buffer gnus-article-buffer
9311                   (mm-detect-coding-region (point) (point-max))))))
9312           (gnus-newsgroup-ignored-charsets 'gnus-all))
9313       (gnus-summary-select-article nil 'force)
9314       (let ((deps gnus-newsgroup-dependencies)
9315             head header lines)
9316         (with-current-buffer gnus-original-article-buffer
9317           (save-restriction
9318             (message-narrow-to-head)
9319             (setq head (buffer-string))
9320             (goto-char (point-min))
9321             (unless (re-search-forward "^lines:[ \t]\\([0-9]+\\)" nil t)
9322               (goto-char (point-max))
9323               (widen)
9324               (setq lines (1- (count-lines (point) (point-max))))))
9325           (with-temp-buffer
9326             (insert (format "211 %d Article retrieved.\n"
9327                             (cdr gnus-article-current)))
9328             (insert head)
9329             (if lines (insert (format "Lines: %d\n" lines)))
9330             (insert ".\n")
9331             (let ((nntp-server-buffer (current-buffer)))
9332               (setq header (car (gnus-get-newsgroup-headers deps t))))))
9333         (gnus-data-set-header
9334          (gnus-data-find (cdr gnus-article-current))
9335          header)
9336         (gnus-summary-update-article-line
9337          (cdr gnus-article-current) header)
9338         (when (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
9339           (gnus-summary-update-secondary-mark (cdr gnus-article-current))))))
9340    ((not arg)
9341     ;; Select the article the normal way.
9342     (gnus-summary-select-article nil 'force))
9343    (t
9344     ;; We have to require this here to make sure that the following
9345     ;; dynamic binding isn't shadowed by autoloading.
9346     (require 'gnus-async)
9347     (require 'gnus-art)
9348     ;; Bind the article treatment functions to nil.
9349     (let ((gnus-have-all-headers t)
9350           gnus-article-prepare-hook
9351           gnus-article-decode-hook
9352           gnus-display-mime-function
9353           gnus-break-pages)
9354       ;; Destroy any MIME parts.
9355       (when (gnus-buffer-live-p gnus-article-buffer)
9356         (with-current-buffer gnus-article-buffer
9357           (mm-destroy-parts gnus-article-mime-handles)
9358           ;; Set it to nil for safety reason.
9359           (setq gnus-article-mime-handle-alist nil)
9360           (setq gnus-article-mime-handles nil)))
9361       (gnus-summary-select-article nil 'force))))
9362   (gnus-summary-goto-subject gnus-current-article)
9363   (gnus-summary-position-point))
9364
9365 (defun gnus-summary-show-raw-article ()
9366   "Show the raw article without any article massaging functions being run."
9367   (interactive)
9368   (gnus-summary-show-article t))
9369
9370 (defun gnus-summary-verbose-headers (&optional arg)
9371   "Toggle permanent full header display.
9372 If ARG is a positive number, turn header display on.
9373 If ARG is a negative number, turn header display off."
9374   (interactive "P")
9375   (setq gnus-show-all-headers
9376         (cond ((or (not (numberp arg))
9377                    (zerop arg))
9378                (not gnus-show-all-headers))
9379               ((natnump arg)
9380                t)))
9381   (gnus-summary-show-article))
9382
9383 (defun gnus-summary-toggle-header (&optional arg)
9384   "Show the headers if they are hidden, or hide them if they are shown.
9385 If ARG is a positive number, show the entire header.
9386 If ARG is a negative number, hide the unwanted header lines."
9387   (interactive "P")
9388   (let ((window (and (gnus-buffer-live-p gnus-article-buffer)
9389                      (get-buffer-window gnus-article-buffer t))))
9390     (with-current-buffer gnus-article-buffer
9391       (widen)
9392       (article-narrow-to-head)
9393       (let* ((inhibit-read-only t)
9394              (inhibit-point-motion-hooks t)
9395              (hidden (if (numberp arg)
9396                          (>= arg 0)
9397                        (or (not (looking-at "[^ \t\n]+:"))
9398                            (gnus-article-hidden-text-p 'headers))))
9399              s e)
9400         (delete-region (point-min) (point-max))
9401         (with-current-buffer gnus-original-article-buffer
9402           (goto-char (setq s (point-min)))
9403           (setq e (if (search-forward "\n\n" nil t)
9404                       (1- (point))
9405                     (point-max))))
9406         (insert-buffer-substring gnus-original-article-buffer s e)
9407         (run-hooks 'gnus-article-decode-hook)
9408         (if hidden
9409             (let ((gnus-treat-hide-headers nil)
9410                   (gnus-treat-hide-boring-headers nil))
9411               (gnus-delete-wash-type 'headers)
9412               (gnus-treat-article 'head))
9413           (gnus-treat-article 'head))
9414         (widen)
9415         (if window
9416             (set-window-start window (goto-char (point-min))))
9417         (if gnus-break-pages
9418             (gnus-narrow-to-page)
9419           (when (gnus-visual-p 'page-marker)
9420             (let ((inhibit-read-only t))
9421               (gnus-remove-text-with-property 'gnus-prev)
9422               (gnus-remove-text-with-property 'gnus-next))))
9423         (gnus-set-mode-line 'article)))))
9424
9425 (defun gnus-summary-show-all-headers ()
9426   "Make all header lines visible."
9427   (interactive)
9428   (gnus-summary-toggle-header 1))
9429
9430 (defun gnus-summary-caesar-message (&optional arg)
9431   "Caesar rotate the current article by 13.
9432 With a non-numerical prefix, also rotate headers.  A numerical
9433 prefix specifies how many places to rotate each letter forward."
9434   (interactive "P")
9435   (gnus-summary-select-article)
9436   (let ((mail-header-separator ""))
9437     (gnus-eval-in-buffer-window gnus-article-buffer
9438       (save-restriction
9439         (widen)
9440         (let ((start (window-start))
9441               (inhibit-read-only t))
9442           (if (equal arg '(4))
9443               (message-caesar-buffer-body nil t)
9444             (message-caesar-buffer-body arg))
9445           (set-window-start (get-buffer-window (current-buffer)) start)))))
9446   ;; Create buttons and stuff...
9447   (gnus-treat-article nil))
9448
9449 (declare-function idna-to-unicode "ext:idna" (str))
9450
9451 (defun gnus-summary-idna-message (&optional arg)
9452   "Decode IDNA encoded domain names in the current articles.
9453 IDNA encoded domain names looks like `xn--bar'.  If a string
9454 remain unencoded after running this function, it is likely an
9455 invalid IDNA string (`xn--bar' is invalid).
9456
9457 You must have GNU Libidn (`http://www.gnu.org/software/libidn/')
9458 installed for this command to work."
9459   (interactive "P")
9460   (if (not (and (condition-case nil (require 'idna)
9461                   (file-error))
9462                 (mm-coding-system-p 'utf-8)
9463                 (executable-find (symbol-value 'idna-program))))
9464       (gnus-message
9465        5 "GNU Libidn not installed properly (`idn' or `idna.el' missing)")
9466     (gnus-summary-select-article)
9467     (let ((mail-header-separator ""))
9468       (gnus-eval-in-buffer-window gnus-article-buffer
9469         (save-restriction
9470           (widen)
9471           (let ((start (window-start))
9472                 buffer-read-only)
9473             (while (re-search-forward "\\(xn--[-0-9a-z]+\\)" nil t)
9474               (replace-match (idna-to-unicode (match-string 1))))
9475             (set-window-start (get-buffer-window (current-buffer)) start)))))))
9476
9477 (defun gnus-summary-morse-message (&optional arg)
9478   "Morse decode the current article."
9479   (interactive "P")
9480   (gnus-summary-select-article)
9481   (let ((mail-header-separator ""))
9482     (gnus-eval-in-buffer-window gnus-article-buffer
9483       (save-excursion
9484         (save-restriction
9485           (widen)
9486           (let ((pos (window-start))
9487                 (inhibit-read-only t))
9488             (goto-char (point-min))
9489             (when (message-goto-body)
9490               (gnus-narrow-to-body))
9491             (goto-char (point-min))
9492             (while (search-forward "·" (point-max) t)
9493               (replace-match "."))
9494             (unmorse-region (point-min) (point-max))
9495             (widen)
9496             (set-window-start (get-buffer-window (current-buffer)) pos)))))))
9497
9498 (defun gnus-summary-stop-page-breaking ()
9499   "Stop page breaking in the current article."
9500   (interactive)
9501   (gnus-summary-select-article)
9502   (gnus-eval-in-buffer-window gnus-article-buffer
9503     (widen)
9504     (when (gnus-visual-p 'page-marker)
9505       (let ((inhibit-read-only t))
9506         (gnus-remove-text-with-property 'gnus-prev)
9507         (gnus-remove-text-with-property 'gnus-next))
9508       (setq gnus-page-broken nil))))
9509
9510 (defun gnus-summary-move-article (&optional n to-newsgroup
9511                                             select-method action)
9512   "Move the current article to a different newsgroup.
9513 If N is a positive number, move the N next articles.
9514 If N is a negative number, move the N previous articles.
9515 If N is nil and any articles have been marked with the process mark,
9516 move those articles instead.
9517 If TO-NEWSGROUP is string, do not prompt for a newsgroup to move to.
9518 If SELECT-METHOD is non-nil, do not move to a specific newsgroup, but
9519 re-spool using this method.
9520
9521 When called interactively with TO-NEWSGROUP being nil, the value of
9522 the variable `gnus-move-split-methods' is used for finding a default
9523 for the target newsgroup.
9524
9525 For this function to work, both the current newsgroup and the
9526 newsgroup that you want to move to have to support the `request-move'
9527 and `request-accept' functions.
9528
9529 ACTION can be either `move' (the default), `crosspost' or `copy'."
9530   (interactive "P")
9531   (unless action
9532     (setq action 'move))
9533   ;; Check whether the source group supports the required functions.
9534   (cond ((and (eq action 'move)
9535               (not (gnus-check-backend-function
9536                     'request-move-article gnus-newsgroup-name)))
9537          (error "The current group does not support article moving"))
9538         ((and (eq action 'crosspost)
9539               (not (gnus-check-backend-function
9540                     'request-replace-article gnus-newsgroup-name)))
9541          (error "The current group does not support article editing")))
9542   (let ((articles (gnus-summary-work-articles n))
9543         (prefix (if (gnus-check-backend-function
9544                      'request-move-article gnus-newsgroup-name)
9545                     (funcall gnus-move-group-prefix-function
9546                              gnus-newsgroup-name)
9547                   ""))
9548         (names '((move "Move" "Moving")
9549                  (copy "Copy" "Copying")
9550                  (crosspost "Crosspost" "Crossposting")))
9551         (copy-buf (save-excursion
9552                     (nnheader-set-temp-buffer " *copy article*")))
9553         art-group to-method new-xref article to-groups
9554         articles-to-update-marks encoded)
9555     (unless (assq action names)
9556       (error "Unknown action %s" action))
9557     ;; Read the newsgroup name.
9558     (when (and (not to-newsgroup)
9559                (not select-method))
9560       (if (and gnus-move-split-methods
9561                (not
9562                 (and (memq gnus-current-article articles)
9563                      (gnus-buffer-live-p gnus-original-article-buffer))))
9564           ;; When `gnus-move-split-methods' is non-nil, we have to
9565           ;; select an article to give `gnus-read-move-group-name' an
9566           ;; opportunity to suggest an appropriate default.  However,
9567           ;; we needn't render or mark the article.
9568           (let ((gnus-display-mime-function nil)
9569                 (gnus-article-prepare-hook nil)
9570                 (gnus-mark-article-hook nil))
9571             (gnus-summary-select-article nil nil nil (car articles))))
9572       (setq to-newsgroup (gnus-read-move-group-name
9573                           (cadr (assq action names))
9574                           (symbol-value
9575                            (intern (format "gnus-current-%s-group" action)))
9576                           articles prefix)
9577             encoded to-newsgroup
9578             to-method (gnus-server-to-method (gnus-group-method to-newsgroup)))
9579       (set (intern (format "gnus-current-%s-group" action))
9580            (mm-decode-coding-string
9581             to-newsgroup
9582             (gnus-group-name-charset to-method to-newsgroup))))
9583     (unless to-method
9584       (setq to-method (or select-method
9585                           (gnus-server-to-method
9586                            (gnus-group-method to-newsgroup)))))
9587     (setq to-newsgroup
9588           (or encoded
9589               (and to-newsgroup
9590                    (mm-encode-coding-string
9591                     to-newsgroup
9592                     (gnus-group-name-charset to-method to-newsgroup)))))
9593     ;; Check the method we are to move this article to...
9594     (unless (gnus-check-backend-function
9595              'request-accept-article (car to-method))
9596       (error "%s does not support article copying" (car to-method)))
9597     (unless (gnus-check-server to-method)
9598       (error "Can't open server %s" (car to-method)))
9599     (gnus-message 6 "%s to %s: %s..."
9600                   (caddr (assq action names))
9601                   (or (car select-method)
9602                       (gnus-group-decoded-name to-newsgroup))
9603                   articles)
9604     (while articles
9605       (setq article (pop articles))
9606       (setq
9607        art-group
9608        (cond
9609         ;; Move the article.
9610         ((eq action 'move)
9611          ;; Remove this article from future suppression.
9612          (gnus-dup-unsuppress-article article)
9613          (let* ((from-method (gnus-find-method-for-group
9614                               gnus-newsgroup-name))
9615                 (to-method (or select-method
9616                                (gnus-find-method-for-group to-newsgroup)))
9617                 (move-is-internal (gnus-method-equal from-method to-method)))
9618            (gnus-request-move-article
9619             article                     ; Article to move
9620             gnus-newsgroup-name         ; From newsgroup
9621             (nth 1 (gnus-find-method-for-group
9622                     gnus-newsgroup-name)) ; Server
9623             (list 'gnus-request-accept-article
9624                   to-newsgroup (list 'quote select-method)
9625                   (not articles) t)     ; Accept form
9626             (not articles)              ; Only save nov last time
9627             move-is-internal)))         ; is this move internal?
9628         ;; Copy the article.
9629         ((eq action 'copy)
9630          (with-current-buffer copy-buf
9631            (when (gnus-request-article-this-buffer article gnus-newsgroup-name)
9632              (save-restriction
9633                (nnheader-narrow-to-headers)
9634                (dolist (hdr gnus-copy-article-ignored-headers)
9635                  (message-remove-header hdr t)))
9636              (gnus-request-accept-article
9637               to-newsgroup select-method (not articles) t))))
9638         ;; Crosspost the article.
9639         ((eq action 'crosspost)
9640          (let ((xref (message-tokenize-header
9641                       (mail-header-xref (gnus-summary-article-header article))
9642                       " ")))
9643            (setq new-xref (concat (gnus-group-real-name gnus-newsgroup-name)
9644                                   ":" (number-to-string article)))
9645            (unless xref
9646              (setq xref (list (system-name))))
9647            (setq new-xref
9648                  (concat
9649                   (mapconcat 'identity
9650                              (delete "Xref:" (delete new-xref xref))
9651                              " ")
9652                   " " new-xref))
9653            (with-current-buffer copy-buf
9654              ;; First put the article in the destination group.
9655              (gnus-request-article-this-buffer article gnus-newsgroup-name)
9656              (when (consp (setq art-group
9657                                 (gnus-request-accept-article
9658                                  to-newsgroup select-method (not articles) t)))
9659                (setq new-xref (concat new-xref " " (car art-group)
9660                                       ":"
9661                                       (number-to-string (cdr art-group))))
9662                ;; Now we have the new Xrefs header, so we insert
9663                ;; it and replace the new article.
9664                (nnheader-replace-header "Xref" new-xref)
9665                (gnus-request-replace-article
9666                 (cdr art-group) to-newsgroup (current-buffer) t)
9667                art-group))))))
9668       (cond
9669        ((not art-group)
9670         (gnus-message 1 "Couldn't %s article %s: %s"
9671                       (cadr (assq action names)) article
9672                       (nnheader-get-report (car to-method))))
9673        ((eq art-group 'junk)
9674         (when (eq action 'move)
9675           (gnus-summary-mark-article article gnus-canceled-mark)
9676           (gnus-message 4 "Deleted article %s" article)
9677           ;; run the delete hook
9678           (run-hook-with-args 'gnus-summary-article-delete-hook
9679                               action
9680                               (gnus-data-header
9681                                (assoc article (gnus-data-list nil)))
9682                               gnus-newsgroup-name nil
9683                               select-method)))
9684        (t
9685         (let* ((pto-group (gnus-group-prefixed-name
9686                            (car art-group) to-method))
9687                (info (gnus-get-info pto-group))
9688                (to-group (gnus-info-group info))
9689                to-marks)
9690           ;; Update the group that has been moved to.
9691           (when (and info
9692                      (memq action '(move copy)))
9693             (unless (member to-group to-groups)
9694               (push to-group to-groups))
9695
9696             (unless (memq article gnus-newsgroup-unreads)
9697               (push 'read to-marks)
9698               (gnus-info-set-read
9699                info (gnus-add-to-range (gnus-info-read info)
9700                                        (list (cdr art-group)))))
9701
9702             ;; See whether the article is to be put in the cache.
9703             (let ((marks (if (gnus-group-auto-expirable-p to-group)
9704                              gnus-article-mark-lists
9705                            (delete '(expirable . expire)
9706                                    (copy-sequence gnus-article-mark-lists))))
9707                   (to-article (cdr art-group)))
9708
9709               ;; Enter the article into the cache in the new group,
9710               ;; if that is required.
9711               (when gnus-use-cache
9712                 (gnus-cache-possibly-enter-article
9713                  to-group to-article
9714                  (memq article gnus-newsgroup-marked)
9715                  (memq article gnus-newsgroup-dormant)
9716                  (memq article gnus-newsgroup-unreads)))
9717
9718               (when gnus-preserve-marks
9719                 ;; Copy any marks over to the new group.
9720                 (when (and (equal to-group gnus-newsgroup-name)
9721                            (not (memq article gnus-newsgroup-unreads)))
9722                   ;; Mark this article as read in this group.
9723                   (push (cons to-article gnus-read-mark) gnus-newsgroup-reads)
9724                   (setcdr (gnus-active to-group) to-article)
9725                   (setcdr gnus-newsgroup-active to-article))
9726
9727                 (while marks
9728                   (when (eq (gnus-article-mark-to-type (cdar marks)) 'list)
9729                     (when (memq article (symbol-value
9730                                          (intern (format "gnus-newsgroup-%s"
9731                                                          (caar marks)))))
9732                       (push (cdar marks) to-marks)
9733                       ;; If the other group is the same as this group,
9734                       ;; then we have to add the mark to the list.
9735                       (when (equal to-group gnus-newsgroup-name)
9736                         (set (intern (format "gnus-newsgroup-%s" (caar marks)))
9737                              (cons to-article
9738                                    (symbol-value
9739                                     (intern (format "gnus-newsgroup-%s"
9740                                                     (caar marks)))))))
9741                       ;; Copy the marks to other group.
9742                       (gnus-add-marked-articles
9743                        to-group (cdar marks) (list to-article) info)))
9744                   (setq marks (cdr marks)))
9745
9746                 (gnus-request-set-mark
9747                  to-group (list (list (list to-article) 'add to-marks))))
9748
9749               (gnus-dribble-enter
9750                (concat "(gnus-group-set-info '"
9751                        (gnus-prin1-to-string (gnus-get-info to-group))
9752                        ")"))))
9753
9754           ;; Update the Xref header in this article to point to
9755           ;; the new crossposted article we have just created.
9756           (when (eq action 'crosspost)
9757             (with-current-buffer copy-buf
9758               (gnus-request-article-this-buffer article gnus-newsgroup-name)
9759               (nnheader-replace-header "Xref" new-xref)
9760               (gnus-request-replace-article
9761                article gnus-newsgroup-name (current-buffer) t)))
9762
9763           ;; run the move/copy/crosspost/respool hook
9764           (run-hook-with-args 'gnus-summary-article-move-hook
9765                               action
9766                               (gnus-data-header
9767                                (assoc article (gnus-data-list nil)))
9768                               gnus-newsgroup-name
9769                               to-newsgroup
9770                               select-method))
9771
9772         ;;;!!!Why is this necessary?
9773         (set-buffer gnus-summary-buffer)
9774
9775         (gnus-summary-goto-subject article)
9776         (when (eq action 'move)
9777           (gnus-summary-mark-article article gnus-canceled-mark))))
9778       (push article articles-to-update-marks))
9779
9780     (apply 'gnus-summary-remove-process-mark articles-to-update-marks)
9781     ;; Re-activate all groups that have been moved to.
9782     (with-current-buffer gnus-group-buffer
9783       (let ((gnus-group-marked to-groups))
9784         (gnus-group-get-new-news-this-group nil t)))
9785
9786     (gnus-kill-buffer copy-buf)
9787     (gnus-summary-position-point)
9788     (gnus-set-mode-line 'summary)))
9789
9790 (defun gnus-summary-copy-article (&optional n to-newsgroup select-method)
9791   "Copy the current article to some other group.
9792 If TO-NEWSGROUP is string, do not prompt for a newsgroup to copy to.
9793 When called interactively, if TO-NEWSGROUP is nil, use the value of
9794 the variable `gnus-move-split-methods' for finding a default target
9795 newsgroup.
9796 If SELECT-METHOD is non-nil, do not move to a specific newsgroup, but
9797 re-spool using this method."
9798   (interactive "P")
9799   (gnus-summary-move-article n to-newsgroup select-method 'copy))
9800
9801 (defun gnus-summary-crosspost-article (&optional n)
9802   "Crosspost the current article to some other group."
9803   (interactive "P")
9804   (gnus-summary-move-article n nil nil 'crosspost))
9805
9806 (defcustom gnus-summary-respool-default-method nil
9807   "Default method type for respooling an article.
9808 If nil, use to the current newsgroup method."
9809   :type 'symbol
9810   :group 'gnus-summary-mail)
9811
9812 (defun gnus-summary-respool-article (&optional n method)
9813   "Respool the current article.
9814 The article will be squeezed through the mail spooling process again,
9815 which means that it will be put in some mail newsgroup or other
9816 depending on `nnmail-split-methods'.
9817 If N is a positive number, respool the N next articles.
9818 If N is a negative number, respool the N previous articles.
9819 If N is nil and any articles have been marked with the process mark,
9820 respool those articles instead.
9821
9822 Respooling can be done both from mail groups and \"real\" newsgroups.
9823 In the former case, the articles in question will be moved from the
9824 current group into whatever groups they are destined to.  In the
9825 latter case, they will be copied into the relevant groups."
9826   (interactive
9827    (list current-prefix-arg
9828          (let* ((methods (gnus-methods-using 'respool))
9829                 (methname
9830                  (symbol-name (or gnus-summary-respool-default-method
9831                                   (car (gnus-find-method-for-group
9832                                         gnus-newsgroup-name)))))
9833                 (method
9834                  (gnus-completing-read-with-default
9835                   methname "Backend to use when respooling"
9836                   methods nil t nil 'gnus-mail-method-history))
9837                 ms)
9838            (cond
9839             ((zerop (length (setq ms (gnus-servers-using-backend
9840                                       (intern method)))))
9841              (list (intern method) ""))
9842             ((= 1 (length ms))
9843              (car ms))
9844             (t
9845              (let ((ms-alist (mapcar (lambda (m) (cons (cadr m) m)) ms)))
9846                (cdr (assoc (completing-read "Server name: " ms-alist nil t)
9847                            ms-alist))))))))
9848   (unless method
9849     (error "No method given for respooling"))
9850   (if (assoc (symbol-name
9851               (car (gnus-find-method-for-group gnus-newsgroup-name)))
9852              (gnus-methods-using 'respool))
9853       (gnus-summary-move-article n nil method)
9854     (gnus-summary-copy-article n nil method)))
9855
9856 (defun gnus-summary-import-article (file &optional edit)
9857   "Import an arbitrary file into a mail newsgroup."
9858   (interactive "fImport file: \nP")
9859   (let ((group gnus-newsgroup-name)
9860         (now (current-time))
9861         atts lines group-art)
9862     (unless (gnus-check-backend-function 'request-accept-article group)
9863       (error "%s does not support article importing" group))
9864     (or (file-readable-p file)
9865         (not (file-regular-p file))
9866         (error "Can't read %s" file))
9867     (with-current-buffer (gnus-get-buffer-create " *import file*")
9868       (erase-buffer)
9869       (nnheader-insert-file-contents file)
9870       (goto-char (point-min))
9871       (if (nnheader-article-p)
9872           (save-restriction
9873             (goto-char (point-min))
9874             (search-forward "\n\n" nil t)
9875             (narrow-to-region (point-min) (1- (point)))
9876             (goto-char (point-min))
9877             (unless (re-search-forward "^date:" nil t)
9878               (goto-char (point-max))
9879               (insert "Date: " (message-make-date (nth 5 atts)) "\n")))
9880        ;; This doesn't look like an article, so we fudge some headers.
9881         (setq atts (file-attributes file)
9882               lines (count-lines (point-min) (point-max)))
9883         (insert "From: " (read-string "From: ") "\n"
9884                 "Subject: " (read-string "Subject: ") "\n"
9885                 "Date: " (message-make-date (nth 5 atts)) "\n"
9886                 "Message-ID: " (message-make-message-id) "\n"
9887                 "Lines: " (int-to-string lines) "\n"
9888                 "Chars: " (int-to-string (nth 7 atts)) "\n\n"))
9889       (setq group-art (gnus-request-accept-article group nil t))
9890       (kill-buffer (current-buffer)))
9891     (setq gnus-newsgroup-active (gnus-activate-group group))
9892     (forward-line 1)
9893     (gnus-summary-goto-article (cdr group-art) nil t)
9894     (when edit
9895       (gnus-summary-edit-article))))
9896
9897 (defun gnus-summary-create-article ()
9898   "Create an article in a mail newsgroup."
9899   (interactive)
9900   (let ((group gnus-newsgroup-name)
9901         (now (current-time))
9902         group-art)
9903     (unless (gnus-check-backend-function 'request-accept-article group)
9904       (error "%s does not support article importing" group))
9905     (with-current-buffer (gnus-get-buffer-create " *import file*")
9906       (erase-buffer)
9907       (goto-char (point-min))
9908       ;; This doesn't look like an article, so we fudge some headers.
9909       (insert "From: " (read-string "From: ") "\n"
9910               "Subject: " (read-string "Subject: ") "\n"
9911               "Date: " (message-make-date now) "\n"
9912               "Message-ID: " (message-make-message-id) "\n")
9913       (setq group-art (gnus-request-accept-article group nil t))
9914       (kill-buffer (current-buffer)))
9915     (setq gnus-newsgroup-active (gnus-activate-group group))
9916     (forward-line 1)
9917     (gnus-summary-goto-article (cdr group-art) nil t)
9918     (gnus-summary-edit-article)))
9919
9920 (defun gnus-summary-article-posted-p ()
9921   "Say whether the current (mail) article is available from news as well.
9922 This will be the case if the article has both been mailed and posted."
9923   (interactive)
9924   (let ((id (mail-header-references (gnus-summary-article-header)))
9925         (gnus-override-method (car (gnus-refer-article-methods))))
9926     (if (gnus-request-head id "")
9927         (gnus-message 2 "The current message was found on %s"
9928                       gnus-override-method)
9929       (gnus-message 2 "The current message couldn't be found on %s"
9930                     gnus-override-method)
9931       nil)))
9932
9933 (defun gnus-summary-expire-articles (&optional now)
9934   "Expire all articles that are marked as expirable in the current group."
9935   (interactive)
9936   (when (and (not gnus-group-is-exiting-without-update-p)
9937              (gnus-check-backend-function
9938               'request-expire-articles gnus-newsgroup-name))
9939     ;; This backend supports expiry.
9940     (let* ((total (gnus-group-total-expirable-p gnus-newsgroup-name))
9941            (expirable (if total
9942                           (progn
9943                             ;; We need to update the info for
9944                             ;; this group for `gnus-list-of-read-articles'
9945                             ;; to give us the right answer.
9946                             (gnus-run-hooks 'gnus-exit-group-hook)
9947                             (gnus-summary-update-info)
9948                             (gnus-list-of-read-articles gnus-newsgroup-name))
9949                         (setq gnus-newsgroup-expirable
9950                               (sort gnus-newsgroup-expirable '<))))
9951            (expiry-wait (if now 'immediate
9952                           (gnus-group-find-parameter
9953                            gnus-newsgroup-name 'expiry-wait)))
9954            (nnmail-expiry-target
9955             (or (gnus-group-find-parameter gnus-newsgroup-name 'expiry-target)
9956                 nnmail-expiry-target))
9957            es)
9958       (when expirable
9959         ;; There are expirable articles in this group, so we run them
9960         ;; through the expiry process.
9961         (gnus-message 6 "Expiring articles...")
9962         (unless (gnus-check-group gnus-newsgroup-name)
9963           (error "Can't open server for %s" gnus-newsgroup-name))
9964         ;; The list of articles that weren't expired is returned.
9965         (save-excursion
9966           (if expiry-wait
9967               (let ((nnmail-expiry-wait-function nil)
9968                     (nnmail-expiry-wait expiry-wait))
9969                 (setq es (gnus-request-expire-articles
9970                           expirable gnus-newsgroup-name)))
9971             (setq es (gnus-request-expire-articles
9972                       expirable gnus-newsgroup-name)))
9973           (unless total
9974             (setq gnus-newsgroup-expirable es))
9975           ;; We go through the old list of expirable, and mark all
9976           ;; really expired articles as nonexistent.
9977           (unless (eq es expirable) ;If nothing was expired, we don't mark.
9978             (let ((gnus-use-cache nil))
9979               (dolist (article expirable)
9980                 (when (and (not (memq article es))
9981                            (gnus-data-find article))
9982                   (gnus-summary-mark-article article gnus-canceled-mark)
9983                   (run-hook-with-args 'gnus-summary-article-expire-hook
9984                                       'delete
9985                                       (gnus-data-header
9986                                        (assoc article (gnus-data-list nil)))
9987                                       gnus-newsgroup-name
9988                                       nil
9989                                       nil))))))
9990         (gnus-message 6 "Expiring articles...done")))))
9991
9992 (defun gnus-summary-expire-articles-now ()
9993   "Expunge all expirable articles in the current group.
9994 This means that *all* articles that are marked as expirable will be
9995 deleted forever, right now."
9996   (interactive)
9997   (or gnus-expert-user
9998       (gnus-yes-or-no-p
9999        "Are you really, really sure you want to delete all expirable messages? ")
10000       (error "Phew!"))
10001   (gnus-summary-expire-articles t))
10002
10003 ;; Suggested by Jack Vinson <vinson@unagi.cis.upenn.edu>.
10004 (defun gnus-summary-delete-article (&optional n)
10005   "Delete the N next (mail) articles.
10006 This command actually deletes articles.  This is not a marking
10007 command.  The article will disappear forever from your life, never to
10008 return.
10009
10010 If N is negative, delete backwards.
10011 If N is nil and articles have been marked with the process mark,
10012 delete these instead.
10013
10014 If `gnus-novice-user' is non-nil you will be asked for
10015 confirmation before the articles are deleted."
10016   (interactive "P")
10017   (unless (gnus-check-backend-function 'request-expire-articles
10018                                        gnus-newsgroup-name)
10019     (error "The current newsgroup does not support article deletion"))
10020   (unless (gnus-check-server (gnus-find-method-for-group gnus-newsgroup-name))
10021     (error "Couldn't open server"))
10022   ;; Compute the list of articles to delete.
10023   (let ((articles (sort (copy-sequence (gnus-summary-work-articles n)) '<))
10024         (nnmail-expiry-target 'delete)
10025         not-deleted)
10026     (if (and gnus-novice-user
10027              (not (gnus-yes-or-no-p
10028                    (format "Do you really want to delete %s forever? "
10029                            (if (> (length articles) 1)
10030                                (format "these %s articles" (length articles))
10031                              "this article")))))
10032         ()
10033       ;; Delete the articles.
10034       (setq not-deleted (gnus-request-expire-articles
10035                          articles gnus-newsgroup-name 'force))
10036       (while articles
10037         (gnus-summary-remove-process-mark (car articles))
10038         ;; The backend might not have been able to delete the article
10039         ;; after all.
10040         (unless (memq (car articles) not-deleted)
10041           (gnus-summary-mark-article (car articles) gnus-canceled-mark))
10042         (let* ((article (car articles))
10043                (ghead  (gnus-data-header
10044                                     (assoc article (gnus-data-list nil)))))
10045           (run-hook-with-args 'gnus-summary-article-delete-hook
10046                               'delete ghead gnus-newsgroup-name nil
10047                               nil))
10048         (setq articles (cdr articles)))
10049       (when not-deleted
10050         (gnus-message 4 "Couldn't delete articles %s" not-deleted)))
10051     (gnus-summary-position-point)
10052     (gnus-set-mode-line 'summary)
10053     not-deleted))
10054
10055 (defun gnus-summary-edit-article (&optional arg)
10056   "Edit the current article.
10057 This will have permanent effect only in mail groups.
10058 If ARG is nil, edit the decoded articles.
10059 If ARG is 1, edit the raw articles.
10060 If ARG is 2, edit the raw articles even in read-only groups.
10061 If ARG is 3, edit the articles with the current handles.
10062 Otherwise, allow editing of articles even in read-only
10063 groups."
10064   (interactive "P")
10065   (let (force raw current-handles)
10066     (cond
10067      ((null arg))
10068      ((eq arg 1)
10069       (setq raw t))
10070      ((eq arg 2)
10071       (setq raw t
10072             force t))
10073      ((eq arg 3)
10074       (setq current-handles
10075             (and (gnus-buffer-live-p gnus-article-buffer)
10076                  (with-current-buffer gnus-article-buffer
10077                    (prog1
10078                        gnus-article-mime-handles
10079                      (setq gnus-article-mime-handles nil))))))
10080      (t
10081       (setq force t)))
10082     (when (and raw (not force)
10083                (member gnus-newsgroup-name '("nndraft:delayed"
10084                                              "nndraft:drafts"
10085                                              "nndraft:queue")))
10086       (error "Can't edit the raw article in group %s"
10087              gnus-newsgroup-name))
10088     (with-current-buffer gnus-summary-buffer
10089       (let ((mail-parse-charset gnus-newsgroup-charset)
10090             (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets))
10091         (gnus-set-global-variables)
10092         (when (and (not force)
10093                    (gnus-group-read-only-p))
10094           (error "The current newsgroup does not support article editing"))
10095         (gnus-summary-show-article t)
10096         (when (and (not raw) (gnus-buffer-live-p gnus-article-buffer))
10097           (with-current-buffer gnus-article-buffer
10098             (mm-enable-multibyte)))
10099         (if (member gnus-newsgroup-name '("nndraft:delayed" "nndraft:drafts"))
10100             (setq raw t))
10101         (gnus-article-edit-article
10102          (if raw 'ignore
10103            `(lambda ()
10104               (let ((mbl mml-buffer-list))
10105                 (setq mml-buffer-list nil)
10106                 (let ((rfc2047-quote-decoded-words-containing-tspecials t))
10107                   (mime-to-mml ,'current-handles))
10108                 (let ((mbl1 mml-buffer-list))
10109                   (setq mml-buffer-list mbl)
10110                   (set (make-local-variable 'mml-buffer-list) mbl1))
10111                 (gnus-make-local-hook 'kill-buffer-hook)
10112                 (add-hook 'kill-buffer-hook 'mml-destroy-buffers t t))))
10113          `(lambda (no-highlight)
10114             (let ((mail-parse-charset ',gnus-newsgroup-charset)
10115                   (message-options message-options)
10116                   (message-options-set-recipient)
10117                   (mail-parse-ignored-charsets
10118                    ',gnus-newsgroup-ignored-charsets)
10119                   (rfc2047-header-encoding-alist
10120                    ',(let ((charset (gnus-group-name-charset
10121                                      (gnus-find-method-for-group
10122                                       gnus-newsgroup-name)
10123                                      gnus-newsgroup-name)))
10124                        (append (list (cons "Newsgroups" charset)
10125                                      (cons "Followup-To" charset)
10126                                      (cons "Xref" charset))
10127                                rfc2047-header-encoding-alist))))
10128               ,(if (not raw) '(progn
10129                                 (mml-to-mime)
10130                                 (mml-destroy-buffers)
10131                                 (remove-hook 'kill-buffer-hook
10132                                              'mml-destroy-buffers t)
10133                                 (kill-local-variable 'mml-buffer-list)))
10134               (gnus-summary-edit-article-done
10135                ,(or (mail-header-references gnus-current-headers) "")
10136                ,(gnus-group-read-only-p)
10137                ,gnus-summary-buffer no-highlight))))))))
10138
10139 (defalias 'gnus-summary-edit-article-postpone 'gnus-article-edit-exit)
10140
10141 (defun gnus-summary-edit-article-done (&optional references read-only buffer
10142                                                  no-highlight)
10143   "Make edits to the current article permanent."
10144   (interactive)
10145   (save-excursion
10146    ;; The buffer restriction contains the entire article if it exists.
10147     (when (article-goto-body)
10148       (let ((lines (count-lines (point) (point-max)))
10149             (length (- (point-max) (point)))
10150             (case-fold-search t)
10151             (body (copy-marker (point))))
10152         (goto-char (point-min))
10153         (when (re-search-forward "^content-length:[ \t]\\([0-9]+\\)" body t)
10154           (delete-region (match-beginning 1) (match-end 1))
10155           (insert (number-to-string length)))
10156         (goto-char (point-min))
10157         (when (re-search-forward
10158                "^x-content-length:[ \t]\\([0-9]+\\)" body t)
10159           (delete-region (match-beginning 1) (match-end 1))
10160           (insert (number-to-string length)))
10161         (goto-char (point-min))
10162         (when (re-search-forward "^lines:[ \t]\\([0-9]+\\)" body t)
10163           (delete-region (match-beginning 1) (match-end 1))
10164           (insert (number-to-string lines))))))
10165   ;; Replace the article.
10166   (let ((buf (current-buffer)))
10167     (with-temp-buffer
10168       (insert-buffer-substring buf)
10169
10170       (if (and (not read-only)
10171                (not (gnus-request-replace-article
10172                      (cdr gnus-article-current) (car gnus-article-current)
10173                      (current-buffer) t)))
10174           (error "Couldn't replace article")
10175         ;; Update the summary buffer.
10176         (if (and references
10177                  (equal (message-tokenize-header references " ")
10178                         (message-tokenize-header
10179                          (or (message-fetch-field "references") "") " ")))
10180             ;; We only have to update this line.
10181             (save-excursion
10182               (save-restriction
10183                 (message-narrow-to-head)
10184                 (let ((head (buffer-substring-no-properties
10185                              (point-min) (point-max)))
10186                       header)
10187                   (with-temp-buffer
10188                     (insert (format "211 %d Article retrieved.\n"
10189                                     (cdr gnus-article-current)))
10190                     (insert head)
10191                     (insert ".\n")
10192                     (let ((nntp-server-buffer (current-buffer)))
10193                       (setq header (car (gnus-get-newsgroup-headers
10194                                          nil t))))
10195                     (with-current-buffer gnus-summary-buffer
10196                       (gnus-data-set-header
10197                        (gnus-data-find (cdr gnus-article-current))
10198                        header)
10199                       (gnus-summary-update-article-line
10200                        (cdr gnus-article-current) header)
10201                       (if (gnus-summary-goto-subject
10202                            (cdr gnus-article-current) nil t)
10203                           (gnus-summary-update-secondary-mark
10204                            (cdr gnus-article-current))))))))
10205           ;; Update threads.
10206           (set-buffer (or buffer gnus-summary-buffer))
10207           (gnus-summary-update-article (cdr gnus-article-current))
10208           (if (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
10209               (gnus-summary-update-secondary-mark
10210                (cdr gnus-article-current))))
10211         ;; Prettify the article buffer again.
10212         (unless no-highlight
10213           (with-current-buffer gnus-article-buffer
10214             ;;;!!! Fix this -- article should be rehighlighted.
10215             ;;;(gnus-run-hooks 'gnus-article-display-hook)
10216             (set-buffer gnus-original-article-buffer)
10217             (gnus-request-article
10218              (cdr gnus-article-current)
10219              (car gnus-article-current) (current-buffer))))
10220         ;; Prettify the summary buffer line.
10221         (when (gnus-visual-p 'summary-highlight 'highlight)
10222           (gnus-run-hooks 'gnus-visual-mark-article-hook))))))
10223
10224 (defun gnus-summary-edit-wash (key)
10225   "Perform editing command KEY in the article buffer."
10226   (interactive
10227    (list
10228     (progn
10229       (message "%s" (concat (this-command-keys) "- "))
10230       (read-char))))
10231   (message "")
10232   (gnus-summary-edit-article)
10233   (execute-kbd-macro (concat (this-command-keys) key))
10234   (gnus-article-edit-done))
10235
10236 ;;; Respooling
10237
10238 (defun gnus-summary-respool-query (&optional silent trace)
10239   "Query where the respool algorithm would put this article."
10240   (interactive)
10241   (let (gnus-mark-article-hook)
10242     (gnus-summary-select-article)
10243     (with-current-buffer gnus-original-article-buffer
10244       (let ((groups (nnmail-article-group 'identity trace)))
10245         (unless silent
10246           (if groups
10247               (message "This message would go to %s"
10248                        (mapconcat 'car groups ", "))
10249             (message "This message would go to no groups"))
10250           groups)))))
10251
10252 (defun gnus-summary-respool-trace ()
10253   "Trace where the respool algorithm would put this article.
10254 Display a buffer showing all fancy splitting patterns which matched."
10255   (interactive)
10256   (gnus-summary-respool-query nil t))
10257
10258 ;; Summary marking commands.
10259
10260 (defun gnus-summary-kill-same-subject-and-select (&optional unmark)
10261   "Mark articles which has the same subject as read, and then select the next.
10262 If UNMARK is positive, remove any kind of mark.
10263 If UNMARK is negative, tick articles."
10264   (interactive "P")
10265   (when unmark
10266     (setq unmark (prefix-numeric-value unmark)))
10267   (let ((count
10268          (gnus-summary-mark-same-subject
10269           (gnus-summary-article-subject) unmark)))
10270     ;; Select next unread article.  If auto-select-same mode, should
10271     ;; select the first unread article.
10272     (gnus-summary-next-article t (and gnus-auto-select-same
10273                                       (gnus-summary-article-subject)))
10274     (gnus-message 7 "%d article%s marked as %s"
10275                   count (if (= count 1) " is" "s are")
10276                   (if unmark "unread" "read"))))
10277
10278 (defun gnus-summary-kill-same-subject (&optional unmark)
10279   "Mark articles which has the same subject as read.
10280 If UNMARK is positive, remove any kind of mark.
10281 If UNMARK is negative, tick articles."
10282   (interactive "P")
10283   (when unmark
10284     (setq unmark (prefix-numeric-value unmark)))
10285   (let ((count
10286          (gnus-summary-mark-same-subject
10287           (gnus-summary-article-subject) unmark)))
10288     ;; If marked as read, go to next unread subject.
10289     (when (null unmark)
10290       ;; Go to next unread subject.
10291       (gnus-summary-next-subject 1 t))
10292     (gnus-message 7 "%d articles are marked as %s"
10293                   count (if unmark "unread" "read"))))
10294
10295 (defun gnus-summary-mark-same-subject (subject &optional unmark)
10296   "Mark articles with same SUBJECT as read, and return marked number.
10297 If optional argument UNMARK is positive, remove any kinds of marks.
10298 If optional argument UNMARK is negative, mark articles as unread instead."
10299   (let ((count 1))
10300     (save-excursion
10301       (cond
10302        ((null unmark)                   ; Mark as read.
10303         (while (and
10304                 (progn
10305                   (gnus-summary-mark-article-as-read gnus-killed-mark)
10306                   (gnus-summary-show-thread) t)
10307                 (gnus-summary-find-subject subject))
10308           (setq count (1+ count))))
10309        ((> unmark 0)                    ; Tick.
10310         (while (and
10311                 (progn
10312                   (gnus-summary-mark-article-as-unread gnus-ticked-mark)
10313                   (gnus-summary-show-thread) t)
10314                 (gnus-summary-find-subject subject))
10315           (setq count (1+ count))))
10316        (t                               ; Mark as unread.
10317         (while (and
10318                 (progn
10319                   (gnus-summary-mark-article-as-unread gnus-unread-mark)
10320                   (gnus-summary-show-thread) t)
10321                 (gnus-summary-find-subject subject))
10322           (setq count (1+ count)))))
10323       (gnus-set-mode-line 'summary)
10324       ;; Return the number of marked articles.
10325       count)))
10326
10327 (defun gnus-summary-mark-as-processable (n &optional unmark)
10328   "Set the process mark on the next N articles.
10329 If N is negative, mark backward instead.  If UNMARK is non-nil, remove
10330 the process mark instead.  The difference between N and the actual
10331 number of articles marked is returned."
10332   (interactive "P")
10333   (if (and (null n) (gnus-region-active-p))
10334       (gnus-uu-mark-region (region-beginning) (region-end) unmark)
10335     (setq n (prefix-numeric-value n))
10336     (let ((backward (< n 0))
10337           (n (abs n)))
10338       (while (and
10339               (> n 0)
10340               (if unmark
10341                   (gnus-summary-remove-process-mark
10342                    (gnus-summary-article-number))
10343                 (gnus-summary-set-process-mark (gnus-summary-article-number)))
10344               (zerop (gnus-summary-next-subject (if backward -1 1) nil t)))
10345         (setq n (1- n)))
10346       (when (/= 0 n)
10347         (gnus-message 7 "No more articles"))
10348       (gnus-summary-recenter)
10349       (gnus-summary-position-point)
10350       n)))
10351
10352 (defun gnus-summary-unmark-as-processable (n)
10353   "Remove the process mark from the next N articles.
10354 If N is negative, unmark backward instead.  The difference between N and
10355 the actual number of articles unmarked is returned."
10356   (interactive "P")
10357   (gnus-summary-mark-as-processable n t))
10358
10359 (defun gnus-summary-unmark-all-processable ()
10360   "Remove the process mark from all articles."
10361   (interactive)
10362   (save-excursion
10363     (while gnus-newsgroup-processable
10364       (gnus-summary-remove-process-mark (car gnus-newsgroup-processable))))
10365   (gnus-summary-position-point))
10366
10367 (defun gnus-summary-add-mark (article type)
10368   "Mark ARTICLE with a mark of TYPE."
10369   (let ((vtype (car (assq type gnus-article-mark-lists)))
10370         var)
10371     (if (not vtype)
10372         (error "No such mark type: %s" type)
10373       (setq var (intern (format "gnus-newsgroup-%s" type)))
10374       (set var (cons article (symbol-value var)))
10375       (if (memq type '(processable cached replied forwarded recent saved))
10376           (gnus-summary-update-secondary-mark article)
10377         ;;; !!! This is bogus.  We should find out what primary
10378         ;;; !!! mark we want to set.
10379         (gnus-summary-update-mark gnus-del-mark 'unread)))))
10380
10381 (defun gnus-summary-mark-as-expirable (n)
10382   "Mark N articles forward as expirable.
10383 If N is negative, mark backward instead.  The difference between N and
10384 the actual number of articles marked is returned."
10385   (interactive "p")
10386   (gnus-summary-mark-forward n gnus-expirable-mark))
10387
10388 (defun gnus-summary-mark-as-spam (n)
10389   "Mark N articles forward as spam.
10390 If N is negative, mark backward instead.  The difference between N and
10391 the actual number of articles marked is returned."
10392   (interactive "p")
10393   (gnus-summary-mark-forward n gnus-spam-mark))
10394
10395 (defun gnus-summary-mark-article-as-replied (article)
10396   "Mark ARTICLE as replied to and update the summary line.
10397 ARTICLE can also be a list of articles."
10398   (interactive (list (gnus-summary-article-number)))
10399   (let ((articles (if (listp article) article (list article))))
10400     (dolist (article articles)
10401       (unless (numberp article)
10402         (error "%s is not a number" article))
10403       (push article gnus-newsgroup-replied)
10404       (let ((inhibit-read-only t))
10405         (when (gnus-summary-goto-subject article nil t)
10406           (gnus-summary-update-secondary-mark article))))))
10407
10408 (defun gnus-summary-mark-article-as-forwarded (article)
10409   "Mark ARTICLE as forwarded and update the summary line.
10410 ARTICLE can also be a list of articles."
10411   (let ((articles (if (listp article) article (list article))))
10412     (dolist (article articles)
10413       (push article gnus-newsgroup-forwarded)
10414       (let ((inhibit-read-only t))
10415         (when (gnus-summary-goto-subject article nil t)
10416           (gnus-summary-update-secondary-mark article))))))
10417
10418 (defun gnus-summary-set-bookmark (article)
10419   "Set a bookmark in current article."
10420   (interactive (list (gnus-summary-article-number)))
10421   (when (or (not (get-buffer gnus-article-buffer))
10422             (not gnus-current-article)
10423             (not gnus-article-current)
10424             (not (equal gnus-newsgroup-name (car gnus-article-current))))
10425     (error "No current article selected"))
10426   ;; Remove old bookmark, if one exists.
10427   (gnus-pull article gnus-newsgroup-bookmarks)
10428   ;; Set the new bookmark, which is on the form
10429   ;; (article-number . line-number-in-body).
10430   (push
10431    (cons article
10432          (with-current-buffer gnus-article-buffer
10433            (count-lines
10434             (min (point)
10435                  (save-excursion
10436                    (article-goto-body)
10437                    (point)))
10438             (point))))
10439    gnus-newsgroup-bookmarks)
10440   (gnus-message 6 "A bookmark has been added to the current article."))
10441
10442 (defun gnus-summary-remove-bookmark (article)
10443   "Remove the bookmark from the current article."
10444   (interactive (list (gnus-summary-article-number)))
10445   ;; Remove old bookmark, if one exists.
10446   (if (not (assq article gnus-newsgroup-bookmarks))
10447       (gnus-message 6 "No bookmark in current article.")
10448     (gnus-pull article gnus-newsgroup-bookmarks)
10449     (gnus-message 6 "Removed bookmark.")))
10450
10451 ;; Suggested by Daniel Quinlan <quinlan@best.com>.
10452 (defun gnus-summary-mark-as-dormant (n)
10453   "Mark N articles forward as dormant.
10454 If N is negative, mark backward instead.  The difference between N and
10455 the actual number of articles marked is returned."
10456   (interactive "p")
10457   (gnus-summary-mark-forward n gnus-dormant-mark))
10458
10459 (defun gnus-summary-set-process-mark (article)
10460   "Set the process mark on ARTICLE and update the summary line."
10461   (setq gnus-newsgroup-processable
10462         (cons article
10463               (delq article gnus-newsgroup-processable)))
10464   (when (gnus-summary-goto-subject article)
10465     (gnus-summary-show-thread)
10466     (gnus-summary-goto-subject article)
10467     (gnus-summary-update-secondary-mark article)))
10468
10469 (defun gnus-summary-remove-process-mark (&rest articles)
10470   "Remove the process mark from ARTICLES and update the summary line."
10471   (dolist (article articles)
10472     (setq gnus-newsgroup-processable (delq article gnus-newsgroup-processable))
10473     (when (gnus-summary-goto-subject article)
10474       (gnus-summary-show-thread)
10475       (gnus-summary-goto-subject article)
10476       (gnus-summary-update-secondary-mark article)))
10477   t)
10478
10479 (defun gnus-summary-set-saved-mark (article)
10480   "Set the process mark on ARTICLE and update the summary line."
10481   (push article gnus-newsgroup-saved)
10482   (when (gnus-summary-goto-subject article)
10483     (gnus-summary-update-secondary-mark article)))
10484
10485 (defun gnus-summary-mark-forward (n &optional mark no-expire)
10486   "Mark N articles as read forwards.
10487 If N is negative, mark backwards instead.  Mark with MARK, ?r by default.
10488 The difference between N and the actual number of articles marked is
10489 returned.
10490 If NO-EXPIRE, auto-expiry will be inhibited."
10491   (interactive "p")
10492   (gnus-summary-show-thread)
10493   (let ((backward (< n 0))
10494         (gnus-summary-goto-unread
10495          (and gnus-summary-goto-unread
10496               (not (eq gnus-summary-goto-unread 'never))
10497               (not (memq mark (list gnus-unread-mark gnus-spam-mark
10498                                     gnus-ticked-mark gnus-dormant-mark)))))
10499         (n (abs n))
10500         (mark (or mark gnus-del-mark)))
10501     (while (and (> n 0)
10502                 (gnus-summary-mark-article nil mark no-expire)
10503                 (zerop (gnus-summary-next-subject
10504                         (if backward -1 1)
10505                         (and gnus-summary-goto-unread
10506                              (not (eq gnus-summary-goto-unread 'never)))
10507                         t)))
10508       (setq n (1- n)))
10509     (when (/= 0 n)
10510       (gnus-message 7 "No more %sarticles" (if mark "" "unread ")))
10511     (gnus-summary-recenter)
10512     (gnus-summary-position-point)
10513     (gnus-set-mode-line 'summary)
10514     n))
10515
10516 (defun gnus-summary-mark-article-as-read (mark)
10517   "Mark the current article quickly as read with MARK."
10518   (let ((article (gnus-summary-article-number)))
10519     (setq gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
10520     (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
10521     (setq gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked))
10522     (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
10523     (push (cons article mark) gnus-newsgroup-reads)
10524     ;; Possibly remove from cache, if that is used.
10525     (when gnus-use-cache
10526       (gnus-cache-enter-remove-article article))
10527     ;; Allow the backend to change the mark.
10528     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10529     ;; Check for auto-expiry.
10530     (when (and gnus-newsgroup-auto-expire
10531                (memq mark gnus-auto-expirable-marks))
10532       (setq mark gnus-expirable-mark)
10533       ;; Let the backend know about the mark change.
10534       (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10535       (push article gnus-newsgroup-expirable))
10536     ;; Set the mark in the buffer.
10537     (gnus-summary-update-mark mark 'unread)
10538     t))
10539
10540 (defun gnus-summary-mark-article-as-unread (mark)
10541   "Mark the current article quickly as unread with MARK."
10542   (let* ((article (gnus-summary-article-number))
10543          (old-mark (gnus-summary-article-mark article)))
10544     ;; Allow the backend to change the mark.
10545     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10546     (if (eq mark old-mark)
10547         t
10548       (if (<= article 0)
10549           (progn
10550             (gnus-error 1 "Can't mark negative article numbers")
10551             nil)
10552         (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
10553         (setq gnus-newsgroup-spam-marked
10554               (delq article gnus-newsgroup-spam-marked))
10555         (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
10556         (setq gnus-newsgroup-expirable (delq article gnus-newsgroup-expirable))
10557         (setq gnus-newsgroup-reads (delq article gnus-newsgroup-reads))
10558         (cond ((= mark gnus-ticked-mark)
10559                (setq gnus-newsgroup-marked
10560                      (gnus-add-to-sorted-list gnus-newsgroup-marked
10561                                               article)))
10562               ((= mark gnus-spam-mark)
10563                (setq gnus-newsgroup-spam-marked
10564                      (gnus-add-to-sorted-list gnus-newsgroup-spam-marked
10565                                               article)))
10566               ((= mark gnus-dormant-mark)
10567                (setq gnus-newsgroup-dormant
10568                      (gnus-add-to-sorted-list gnus-newsgroup-dormant
10569                                               article)))
10570               (t
10571                (setq gnus-newsgroup-unreads
10572                      (gnus-add-to-sorted-list gnus-newsgroup-unreads
10573                                               article))))
10574         (gnus-pull article gnus-newsgroup-reads)
10575
10576         ;; See whether the article is to be put in the cache.
10577         (and gnus-use-cache
10578              (vectorp (gnus-summary-article-header article))
10579              (save-excursion
10580                (gnus-cache-possibly-enter-article
10581                 gnus-newsgroup-name article
10582                 (= mark gnus-ticked-mark)
10583                 (= mark gnus-dormant-mark) (= mark gnus-unread-mark))))
10584
10585         ;; Fix the mark.
10586         (gnus-summary-update-mark mark 'unread)
10587         t))))
10588
10589 (defun gnus-summary-mark-article (&optional article mark no-expire)
10590   "Mark ARTICLE with MARK.  MARK can be any character.
10591 Four MARK strings are reserved: `? ' (unread), `?!' (ticked),
10592 `??' (dormant) and `?E' (expirable).
10593 If MARK is nil, then the default character `?r' is used.
10594 If ARTICLE is nil, then the article on the current line will be
10595 marked.
10596 If NO-EXPIRE, auto-expiry will be inhibited."
10597   ;; The mark might be a string.
10598   (when (stringp mark)
10599     (setq mark (aref mark 0)))
10600   ;; If no mark is given, then we check auto-expiring.
10601   (when (null mark)
10602     (setq mark gnus-del-mark))
10603   (when (and (not no-expire)
10604              gnus-newsgroup-auto-expire
10605              (memq mark gnus-auto-expirable-marks))
10606     (setq mark gnus-expirable-mark))
10607   (let ((article (or article (gnus-summary-article-number)))
10608         (old-mark (gnus-summary-article-mark article)))
10609     ;; Allow the backend to change the mark.
10610     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10611     (if (eq mark old-mark)
10612         t
10613       (unless article
10614         (error "No article on current line"))
10615       (if (not (if (or (= mark gnus-unread-mark)
10616                        (= mark gnus-ticked-mark)
10617                        (= mark gnus-spam-mark)
10618                        (= mark gnus-dormant-mark))
10619                    (gnus-mark-article-as-unread article mark)
10620                  (gnus-mark-article-as-read article mark)))
10621           t
10622         ;; See whether the article is to be put in the cache.
10623         (and gnus-use-cache
10624              (not (= mark gnus-canceled-mark))
10625              (vectorp (gnus-summary-article-header article))
10626              (save-excursion
10627                (gnus-cache-possibly-enter-article
10628                 gnus-newsgroup-name article
10629                 (= mark gnus-ticked-mark)
10630                 (= mark gnus-dormant-mark) (= mark gnus-unread-mark))))
10631
10632         (when (gnus-summary-goto-subject article nil t)
10633           (let ((inhibit-read-only t))
10634             (gnus-summary-show-thread)
10635             ;; Fix the mark.
10636             (gnus-summary-update-mark mark 'unread)
10637             t))))))
10638
10639 (defun gnus-summary-update-secondary-mark (article)
10640   "Update the secondary (read, process, cache) mark."
10641   (gnus-summary-update-mark
10642    (cond ((memq article gnus-newsgroup-processable)
10643           gnus-process-mark)
10644          ((memq article gnus-newsgroup-cached)
10645           gnus-cached-mark)
10646          ((memq article gnus-newsgroup-replied)
10647           gnus-replied-mark)
10648          ((memq article gnus-newsgroup-forwarded)
10649           gnus-forwarded-mark)
10650          ((memq article gnus-newsgroup-saved)
10651           gnus-saved-mark)
10652          ((memq article gnus-newsgroup-recent)
10653           gnus-recent-mark)
10654          ((memq article gnus-newsgroup-unseen)
10655           gnus-unseen-mark)
10656          (t gnus-no-mark))
10657    'replied)
10658   (when (gnus-visual-p 'summary-highlight 'highlight)
10659     (gnus-run-hooks 'gnus-summary-update-hook))
10660   t)
10661
10662 (defun gnus-summary-update-download-mark (article)
10663   "Update the download mark."
10664   (gnus-summary-update-mark
10665    (cond ((memq article gnus-newsgroup-undownloaded)
10666           gnus-undownloaded-mark)
10667          (gnus-newsgroup-agentized
10668           gnus-downloaded-mark)
10669          (t
10670           gnus-no-mark))
10671    'download)
10672   (gnus-summary-update-line t)
10673   t)
10674
10675 (defun gnus-summary-update-mark (mark type)
10676   (let ((forward (cdr (assq type gnus-summary-mark-positions)))
10677         (inhibit-read-only t))
10678     (re-search-backward "[\n\r]" (point-at-bol) 'move-to-limit)
10679     (when forward
10680       (when (looking-at "\r")
10681         (incf forward))
10682       (when (<= (+ forward (point)) (point-max))
10683         ;; Go to the right position on the line.
10684         (goto-char (+ forward (point)))
10685         ;; Replace the old mark with the new mark.
10686         (subst-char-in-region (point) (1+ (point)) (char-after) mark)
10687         ;; Optionally update the marks by some user rule.
10688         (when (eq type 'unread)
10689           (gnus-data-set-mark
10690            (gnus-data-find (gnus-summary-article-number)) mark)
10691           (gnus-summary-update-line (eq mark gnus-unread-mark)))))))
10692
10693 (defun gnus-mark-article-as-read (article &optional mark)
10694   "Enter ARTICLE in the pertinent lists and remove it from others."
10695   ;; Make the article expirable.
10696   (let ((mark (or mark gnus-del-mark)))
10697     (setq gnus-newsgroup-expirable
10698           (if (= mark gnus-expirable-mark)
10699               (gnus-add-to-sorted-list gnus-newsgroup-expirable article)
10700             (delq article gnus-newsgroup-expirable)))
10701     ;; Remove from unread and marked lists.
10702     (setq gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
10703     (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
10704     (setq gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked))
10705     (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
10706     (push (cons article mark) gnus-newsgroup-reads)
10707     ;; Possibly remove from cache, if that is used.
10708     (when gnus-use-cache
10709       (gnus-cache-enter-remove-article article))
10710     t))
10711
10712 (defun gnus-mark-article-as-unread (article &optional mark)
10713   "Enter ARTICLE in the pertinent lists and remove it from others."
10714   (let ((mark (or mark gnus-ticked-mark)))
10715     (if (<= article 0)
10716         (progn
10717           (gnus-error 1 "Can't mark negative article numbers")
10718           nil)
10719       (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked)
10720             gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked)
10721             gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant)
10722             gnus-newsgroup-expirable (delq article gnus-newsgroup-expirable)
10723             gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
10724
10725       ;; Unsuppress duplicates?
10726       (when gnus-suppress-duplicates
10727         (gnus-dup-unsuppress-article article))
10728
10729       (cond ((= mark gnus-ticked-mark)
10730              (setq gnus-newsgroup-marked
10731                    (gnus-add-to-sorted-list gnus-newsgroup-marked article)))
10732             ((= mark gnus-spam-mark)
10733              (setq gnus-newsgroup-spam-marked
10734                    (gnus-add-to-sorted-list gnus-newsgroup-spam-marked
10735                                             article)))
10736             ((= mark gnus-dormant-mark)
10737              (setq gnus-newsgroup-dormant
10738                    (gnus-add-to-sorted-list gnus-newsgroup-dormant article)))
10739             (t
10740              (setq gnus-newsgroup-unreads
10741                    (gnus-add-to-sorted-list gnus-newsgroup-unreads article))))
10742       (gnus-pull article gnus-newsgroup-reads)
10743       t)))
10744
10745 (defalias 'gnus-summary-mark-as-unread-forward
10746   'gnus-summary-tick-article-forward)
10747 (make-obsolete 'gnus-summary-mark-as-unread-forward
10748                'gnus-summary-tick-article-forward)
10749 (defun gnus-summary-tick-article-forward (n)
10750   "Tick N articles forwards.
10751 If N is negative, tick backwards instead.
10752 The difference between N and the number of articles ticked is returned."
10753   (interactive "p")
10754   (gnus-summary-mark-forward n gnus-ticked-mark))
10755
10756 (defalias 'gnus-summary-mark-as-unread-backward
10757   'gnus-summary-tick-article-backward)
10758 (make-obsolete 'gnus-summary-mark-as-unread-backward
10759                'gnus-summary-tick-article-backward)
10760 (defun gnus-summary-tick-article-backward (n)
10761   "Tick N articles backwards.
10762 The difference between N and the number of articles ticked is returned."
10763   (interactive "p")
10764   (gnus-summary-mark-forward (- n) gnus-ticked-mark))
10765
10766 (defalias 'gnus-summary-mark-as-unread 'gnus-summary-tick-article)
10767 (make-obsolete 'gnus-summary-mark-as-unread 'gnus-summary-tick-article)
10768 (defun gnus-summary-tick-article (&optional article clear-mark)
10769   "Mark current article as unread.
10770 Optional 1st argument ARTICLE specifies article number to be marked as unread.
10771 Optional 2nd argument CLEAR-MARK remove any kinds of mark."
10772   (interactive)
10773   (gnus-summary-mark-article article (if clear-mark gnus-unread-mark
10774                                        gnus-ticked-mark)))
10775
10776 (defun gnus-summary-mark-as-read-forward (n)
10777   "Mark N articles as read forwards.
10778 If N is negative, mark backwards instead.
10779 The difference between N and the actual number of articles marked is
10780 returned."
10781   (interactive "p")
10782   (gnus-summary-mark-forward n gnus-del-mark gnus-inhibit-user-auto-expire))
10783
10784 (defun gnus-summary-mark-as-read-backward (n)
10785   "Mark the N articles as read backwards.
10786 The difference between N and the actual number of articles marked is
10787 returned."
10788   (interactive "p")
10789   (gnus-summary-mark-forward
10790    (- n) gnus-del-mark gnus-inhibit-user-auto-expire))
10791
10792 (defun gnus-summary-mark-as-read (&optional article mark)
10793   "Mark current article as read.
10794 ARTICLE specifies the article to be marked as read.
10795 MARK specifies a string to be inserted at the beginning of the line."
10796   (gnus-summary-mark-article article mark))
10797
10798 (defun gnus-summary-clear-mark-forward (n)
10799   "Clear marks from N articles forward.
10800 If N is negative, clear backward instead.
10801 The difference between N and the number of marks cleared is returned."
10802   (interactive "p")
10803   (gnus-summary-mark-forward n gnus-unread-mark))
10804
10805 (defun gnus-summary-clear-mark-backward (n)
10806   "Clear marks from N articles backward.
10807 The difference between N and the number of marks cleared is returned."
10808   (interactive "p")
10809   (gnus-summary-mark-forward (- n) gnus-unread-mark))
10810
10811 (defun gnus-summary-mark-unread-as-read ()
10812   "Intended to be used by `gnus-mark-article-hook'."
10813   (when (memq gnus-current-article gnus-newsgroup-unreads)
10814     (gnus-summary-mark-article gnus-current-article gnus-read-mark)))
10815
10816 (defun gnus-summary-mark-read-and-unread-as-read (&optional new-mark)
10817   "Intended to be used by `gnus-mark-article-hook'."
10818   (let ((mark (gnus-summary-article-mark)))
10819     (when (or (gnus-unread-mark-p mark)
10820               (gnus-read-mark-p mark))
10821       (gnus-summary-mark-article gnus-current-article
10822                                  (or new-mark gnus-read-mark)))))
10823
10824 (defun gnus-summary-mark-current-read-and-unread-as-read (&optional new-mark)
10825   "Intended to be used by `gnus-mark-article-hook'."
10826   (let ((mark (gnus-summary-article-mark)))
10827     (when (or (gnus-unread-mark-p mark)
10828               (gnus-read-mark-p mark))
10829       (gnus-summary-mark-article (gnus-summary-article-number)
10830                                  (or new-mark gnus-read-mark)))))
10831
10832 (defun gnus-summary-mark-unread-as-ticked ()
10833   "Intended to be used by `gnus-mark-article-hook'."
10834   (when (memq gnus-current-article gnus-newsgroup-unreads)
10835     (gnus-summary-mark-article gnus-current-article gnus-ticked-mark)))
10836
10837 (defun gnus-summary-mark-region-as-read (point mark all)
10838   "Mark all unread articles between point and mark as read.
10839 If given a prefix, mark all articles between point and mark as read,
10840 even ticked and dormant ones."
10841   (interactive "r\nP")
10842   (save-excursion
10843     (let (article)
10844       (goto-char point)
10845       (beginning-of-line)
10846       (while (and
10847               (< (point) mark)
10848               (progn
10849                 (when (or all
10850                           (memq (setq article (gnus-summary-article-number))
10851                                 gnus-newsgroup-unreads))
10852                   (gnus-summary-mark-article article gnus-del-mark))
10853                 t)
10854               (gnus-summary-find-next))))))
10855
10856 (defun gnus-summary-mark-below (score mark)
10857   "Mark articles with score less than SCORE with MARK."
10858   (interactive "P\ncMark: ")
10859   (setq score (if score
10860                   (prefix-numeric-value score)
10861                 (or gnus-summary-default-score 0)))
10862   (with-current-buffer gnus-summary-buffer
10863     (goto-char (point-min))
10864     (while
10865         (progn
10866           (and (< (gnus-summary-article-score) score)
10867                (gnus-summary-mark-article nil mark))
10868           (gnus-summary-find-next)))))
10869
10870 (defun gnus-summary-kill-below (&optional score)
10871   "Mark articles with score below SCORE as read."
10872   (interactive "P")
10873   (gnus-summary-mark-below score gnus-killed-mark))
10874
10875 (defun gnus-summary-clear-above (&optional score)
10876   "Clear all marks from articles with score above SCORE."
10877   (interactive "P")
10878   (gnus-summary-mark-above score gnus-unread-mark))
10879
10880 (defun gnus-summary-tick-above (&optional score)
10881   "Tick all articles with score above SCORE."
10882   (interactive "P")
10883   (gnus-summary-mark-above score gnus-ticked-mark))
10884
10885 (defun gnus-summary-mark-above (score mark)
10886   "Mark articles with score over SCORE with MARK."
10887   (interactive "P\ncMark: ")
10888   (setq score (if score
10889                   (prefix-numeric-value score)
10890                 (or gnus-summary-default-score 0)))
10891   (with-current-buffer gnus-summary-buffer
10892     (goto-char (point-min))
10893     (while (and (progn
10894                   (when (> (gnus-summary-article-score) score)
10895                     (gnus-summary-mark-article nil mark))
10896                   t)
10897                 (gnus-summary-find-next)))))
10898
10899 ;; Suggested by Daniel Quinlan <quinlan@best.com>.
10900 (defalias 'gnus-summary-show-all-expunged 'gnus-summary-limit-include-expunged)
10901 (defun gnus-summary-limit-include-expunged (&optional no-error)
10902   "Display all the hidden articles that were expunged for low scores."
10903   (interactive)
10904   (let ((inhibit-read-only t))
10905     (let ((scored gnus-newsgroup-scored)
10906           headers h)
10907       (while scored
10908         (unless (gnus-summary-article-header (caar scored))
10909           (and (setq h (gnus-number-to-header (caar scored)))
10910                (< (cdar scored) gnus-summary-expunge-below)
10911                (push h headers)))
10912         (setq scored (cdr scored)))
10913       (if (not headers)
10914           (when (not no-error)
10915             (error "No expunged articles hidden"))
10916         (goto-char (point-min))
10917         (push gnus-newsgroup-limit gnus-newsgroup-limits)
10918         (setq gnus-newsgroup-limit (copy-sequence gnus-newsgroup-limit))
10919         (dolist (x headers)
10920           (push (mail-header-number x) gnus-newsgroup-limit))
10921         (gnus-summary-prepare-unthreaded (nreverse headers))
10922         (goto-char (point-min))
10923         (gnus-summary-position-point)
10924         t))))
10925
10926 (defun gnus-summary-catchup (&optional all quietly to-here not-mark reverse)
10927   "Mark all unread articles in this newsgroup as read.
10928 If prefix argument ALL is non-nil, ticked and dormant articles will
10929 also be marked as read.
10930 If QUIETLY is non-nil, no questions will be asked.
10931
10932 If TO-HERE is non-nil, it should be a point in the buffer.  All
10933 articles before (after, if REVERSE is set) this point will be marked
10934 as read.
10935
10936 Note that this function will only catch up the unread article
10937 in the current summary buffer limitation.
10938
10939 The number of articles marked as read is returned."
10940   (interactive "P")
10941   (prog1
10942       (save-excursion
10943         (when (or quietly
10944                   (not gnus-interactive-catchup) ;Without confirmation?
10945                   gnus-expert-user
10946                   (gnus-y-or-n-p
10947                    (if all
10948                        "Mark absolutely all articles as read? "
10949                      "Mark all unread articles as read? ")))
10950           (if (and not-mark
10951                    (not gnus-newsgroup-adaptive)
10952                    (not gnus-newsgroup-auto-expire)
10953                    (not gnus-suppress-duplicates)
10954                    (or (not gnus-use-cache)
10955                        (eq gnus-use-cache 'passive)))
10956               (progn
10957                 (when all
10958                   (setq gnus-newsgroup-marked nil
10959                         gnus-newsgroup-spam-marked nil
10960                         gnus-newsgroup-dormant nil))
10961                 (setq gnus-newsgroup-unreads
10962                       (gnus-sorted-nunion
10963                        (gnus-sorted-intersection gnus-newsgroup-unreads
10964                                                  gnus-newsgroup-downloadable)
10965                        (gnus-sorted-difference gnus-newsgroup-unfetched
10966                                                gnus-newsgroup-cached))))
10967             ;; We actually mark all articles as canceled, which we
10968             ;; have to do when using auto-expiry or adaptive scoring.
10969             (gnus-summary-show-all-threads)
10970             (if (and to-here reverse)
10971                 (progn
10972                   (goto-char to-here)
10973                   (gnus-summary-mark-current-read-and-unread-as-read
10974                    gnus-catchup-mark)
10975                   (while (gnus-summary-find-next (not all))
10976                     (gnus-summary-mark-article-as-read gnus-catchup-mark)))
10977               (when (gnus-summary-first-subject (not all))
10978                 (while (and
10979                         (if to-here (< (point) to-here) t)
10980                         (gnus-summary-mark-article-as-read gnus-catchup-mark)
10981                         (gnus-summary-find-next (not all))))))
10982             (gnus-set-mode-line 'summary))
10983           t))
10984     (gnus-summary-position-point)))
10985
10986 (defun gnus-summary-catchup-to-here (&optional all)
10987   "Mark all unticked articles before the current one as read.
10988 If ALL is non-nil, also mark ticked and dormant articles as read."
10989   (interactive "P")
10990   (save-excursion
10991     (gnus-save-hidden-threads
10992       (let ((beg (point)))
10993         ;; We check that there are unread articles.
10994         (when (or all (gnus-summary-find-prev))
10995           (gnus-summary-catchup all t beg)))))
10996   (gnus-summary-position-point))
10997
10998 (defun gnus-summary-catchup-from-here (&optional all)
10999   "Mark all unticked articles after (and including) the current one as read.
11000 If ALL is non-nil, also mark ticked and dormant articles as read."
11001   (interactive "P")
11002   (save-excursion
11003     (gnus-save-hidden-threads
11004       (let ((beg (point)))
11005         ;; We check that there are unread articles.
11006         (when (or all (gnus-summary-find-next))
11007           (gnus-summary-catchup all t beg nil t)))))
11008   (gnus-summary-position-point))
11009
11010 (defun gnus-summary-catchup-all (&optional quietly)
11011   "Mark all articles in this newsgroup as read.
11012 This command is dangerous.  Normally, you want \\[gnus-summary-catchup]
11013 instead, which marks only unread articles as read."
11014   (interactive "P")
11015   (gnus-summary-catchup t quietly))
11016
11017 (defun gnus-summary-catchup-and-exit (&optional all quietly)
11018   "Mark all unread articles in this group as read, then exit.
11019 If prefix argument ALL is non-nil, all articles are marked as read.
11020 If QUIETLY is non-nil, no questions will be asked."
11021   (interactive "P")
11022   (when (gnus-summary-catchup all quietly nil 'fast)
11023     ;; Select next newsgroup or exit.
11024     (if (and (not (gnus-group-quit-config gnus-newsgroup-name))
11025              (eq gnus-auto-select-next 'quietly))
11026         (gnus-summary-next-group nil)
11027       (gnus-summary-exit))))
11028
11029 (defun gnus-summary-catchup-all-and-exit (&optional quietly)
11030   "Mark all articles in this newsgroup as read, and then exit.
11031 This command is dangerous.  Normally, you want \\[gnus-summary-catchup-and-exit]
11032 instead, which marks only unread articles as read."
11033   (interactive "P")
11034   (gnus-summary-catchup-and-exit t quietly))
11035
11036 (defun gnus-summary-catchup-and-goto-next-group (&optional all)
11037   "Mark all articles in this group as read and select the next group.
11038 If given a prefix, mark all articles, unread as well as ticked, as
11039 read."
11040   (interactive "P")
11041   (save-excursion
11042     (gnus-summary-catchup all))
11043   (gnus-summary-next-group))
11044
11045 (defun gnus-summary-catchup-and-goto-prev-group (&optional all)
11046   "Mark all articles in this group as read and select the previous group.
11047 If given a prefix, mark all articles, unread as well as ticked, as
11048 read."
11049   (interactive "P")
11050   (save-excursion
11051     (gnus-summary-catchup all))
11052   (gnus-summary-next-group nil nil t))
11053
11054 ;;;
11055 ;;; with article
11056 ;;;
11057
11058 (defmacro gnus-with-article (article &rest forms)
11059   "Select ARTICLE and perform FORMS in the original article buffer.
11060 Then replace the article with the result."
11061   `(progn
11062      ;; We don't want the article to be marked as read.
11063      (let (gnus-mark-article-hook)
11064        (gnus-summary-select-article t t nil ,article))
11065      (set-buffer gnus-original-article-buffer)
11066      ,@forms
11067      (if (not (gnus-check-backend-function
11068                'request-replace-article (car gnus-article-current)))
11069          (gnus-message 5 "Read-only group; not replacing")
11070        (unless (gnus-request-replace-article
11071                 ,article (car gnus-article-current)
11072                 (current-buffer) t)
11073          (error "Couldn't replace article")))
11074      ;; The cache and backlog have to be flushed somewhat.
11075      (when gnus-keep-backlog
11076        (gnus-backlog-remove-article
11077         (car gnus-article-current) (cdr gnus-article-current)))
11078      (when gnus-use-cache
11079        (gnus-cache-update-article
11080         (car gnus-article-current) (cdr gnus-article-current)))))
11081
11082 (put 'gnus-with-article 'lisp-indent-function 1)
11083 (put 'gnus-with-article 'edebug-form-spec '(form body))
11084
11085 ;; Thread-based commands.
11086
11087 (defun gnus-summary-articles-in-thread (&optional article)
11088   "Return a list of all articles in the current thread.
11089 If ARTICLE is non-nil, return all articles in the thread that starts
11090 with that article."
11091   (let* ((article (or article (gnus-summary-article-number)))
11092          (data (gnus-data-find-list article))
11093          (top-level (gnus-data-level (car data)))
11094          (top-subject
11095           (cond ((null gnus-thread-operation-ignore-subject)
11096                  (gnus-simplify-subject-re
11097                   (mail-header-subject (gnus-data-header (car data)))))
11098                 ((eq gnus-thread-operation-ignore-subject 'fuzzy)
11099                  (gnus-simplify-subject-fuzzy
11100                   (mail-header-subject (gnus-data-header (car data)))))
11101                 (t nil)))
11102          (end-point (save-excursion
11103                       (if (gnus-summary-go-to-next-thread)
11104                           (point) (point-max))))
11105          articles)
11106     (while (and data
11107                 (< (gnus-data-pos (car data)) end-point))
11108       (when (or (not top-subject)
11109                 (string= top-subject
11110                          (if (eq gnus-thread-operation-ignore-subject 'fuzzy)
11111                              (gnus-simplify-subject-fuzzy
11112                               (mail-header-subject
11113                                (gnus-data-header (car data))))
11114                            (gnus-simplify-subject-re
11115                             (mail-header-subject
11116                              (gnus-data-header (car data)))))))
11117         (push (gnus-data-number (car data)) articles))
11118       (unless (and (setq data (cdr data))
11119                    (> (gnus-data-level (car data)) top-level))
11120         (setq data nil)))
11121     ;; Return the list of articles.
11122     (nreverse articles)))
11123
11124 (defun gnus-summary-rethread-current ()
11125   "Rethread the thread the current article is part of."
11126   (interactive)
11127   (let* ((gnus-show-threads t)
11128          (article (gnus-summary-article-number))
11129          (id (mail-header-id (gnus-summary-article-header)))
11130          (gnus-newsgroup-threads (list (gnus-id-to-thread (gnus-root-id id)))))
11131     (unless id
11132       (error "No article on the current line"))
11133     (gnus-rebuild-thread id)
11134     (gnus-summary-goto-subject article)))
11135
11136 (defun gnus-summary-reparent-thread ()
11137   "Make the current article child of the marked (or previous) article.
11138
11139 Note that the re-threading will only work if `gnus-thread-ignore-subject'
11140 is non-nil or the Subject: of both articles are the same."
11141   (interactive)
11142   (unless (not (gnus-group-read-only-p))
11143     (error "The current newsgroup does not support article editing"))
11144   (unless (<= (length gnus-newsgroup-processable) 1)
11145     (error "No more than one article may be marked"))
11146   (let ((child (gnus-summary-article-number))
11147         ;; First grab the marked article, otherwise one line up.
11148         (parent (if (not (null gnus-newsgroup-processable))
11149                     (car gnus-newsgroup-processable)
11150                   (save-excursion
11151                     (if (eq (forward-line -1) 0)
11152                         (gnus-summary-article-number)
11153                       (error "Beginning of summary buffer"))))))
11154     (gnus-summary-reparent-children parent (list child))))
11155
11156 (defun gnus-summary-reparent-children (parent children)
11157   "Make PARENT the parent of CHILDREN.
11158 When called interactively, PARENT is the current article and CHILDREN
11159 are the process-marked articles."
11160   (interactive
11161    (list (gnus-summary-article-number)
11162          (gnus-summary-work-articles nil)))
11163   (dolist (child children)
11164     (save-window-excursion
11165       (let ((gnus-article-buffer " *reparent*"))
11166         (unless (not (eq parent child))
11167           (error "An article may not be self-referential"))
11168         (let ((message-id (mail-header-id
11169                            (gnus-summary-article-header parent))))
11170           (unless (and message-id (not (equal message-id "")))
11171             (error "No message-id in desired parent"))
11172           (gnus-with-article child
11173             (save-restriction
11174               (goto-char (point-min))
11175               (message-narrow-to-head)
11176               (if (re-search-forward "^References: " nil t)
11177                   (progn
11178                     (re-search-forward "^[^ \t]" nil t)
11179                     (forward-line -1)
11180                     (end-of-line)
11181                     (insert " " message-id))
11182                 (insert "References: " message-id "\n"))))
11183           (set-buffer gnus-summary-buffer)
11184           (gnus-summary-unmark-all-processable)
11185           (gnus-summary-update-article child)
11186           (when (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
11187             (gnus-summary-update-secondary-mark (cdr gnus-article-current)))
11188           (gnus-summary-rethread-current)
11189           (gnus-message 3 "Article %d is now the child of article %d"
11190                         child parent))))))
11191
11192 (defun gnus-summary-toggle-threads (&optional arg)
11193   "Toggle showing conversation threads.
11194 If ARG is positive number, turn showing conversation threads on."
11195   (interactive "P")
11196   (let ((current (or (gnus-summary-article-number) gnus-newsgroup-end)))
11197     (setq gnus-show-threads
11198           (if (null arg) (not gnus-show-threads)
11199             (> (prefix-numeric-value arg) 0)))
11200     (gnus-summary-prepare)
11201     (gnus-summary-goto-subject current)
11202     (gnus-message 6 "Threading is now %s" (if gnus-show-threads "on" "off"))
11203     (gnus-summary-position-point)))
11204
11205 (defun gnus-summary-show-all-threads ()
11206   "Show all threads."
11207   (interactive)
11208   (save-excursion
11209     (let ((buffer-read-only nil))
11210       (subst-char-in-region (point-min) (point-max) ?\^M ?\n t)))
11211   (gnus-summary-position-point))
11212
11213 (defun gnus-summary-show-thread ()
11214   "Show thread subtrees.
11215 Returns nil if no thread was there to be shown."
11216   (interactive)
11217   (let ((buffer-read-only nil)
11218         (orig (point))
11219         (end (point-at-eol))
11220         ;; Leave point at bol
11221         (beg (progn (beginning-of-line) (point))))
11222     (prog1
11223         ;; Any hidden lines here?
11224         (search-forward "\r" end t)
11225       (subst-char-in-region beg end ?\^M ?\n t)
11226       (goto-char orig)
11227       (gnus-summary-position-point))))
11228
11229 (defun gnus-summary-maybe-hide-threads ()
11230   "If requested, hide the threads that should be hidden."
11231   (when (and gnus-show-threads
11232              gnus-thread-hide-subtree)
11233     (gnus-summary-hide-all-threads
11234      (if (or (consp gnus-thread-hide-subtree)
11235              (functionp gnus-thread-hide-subtree))
11236          (gnus-make-predicate gnus-thread-hide-subtree)
11237        nil))))
11238
11239 ;;; Hiding predicates.
11240
11241 (defun gnus-article-unread-p (header)
11242   (memq (mail-header-number header) gnus-newsgroup-unreads))
11243
11244 (defun gnus-article-unseen-p (header)
11245   (memq (mail-header-number header) gnus-newsgroup-unseen))
11246
11247 (defun gnus-map-articles (predicate articles)
11248   "Map PREDICATE over ARTICLES and return non-nil if any predicate is non-nil."
11249   (apply 'gnus-or (mapcar predicate
11250                           (mapcar (lambda (number)
11251                                     (gnus-summary-article-header number))
11252                                   articles))))
11253
11254 (defun gnus-summary-hide-all-threads (&optional predicate)
11255   "Hide all thread subtrees.
11256 If PREDICATE is supplied, threads that satisfy this predicate
11257 will not be hidden."
11258   (interactive)
11259   (save-excursion
11260     (goto-char (point-min))
11261     (let ((end nil))
11262       (while (not end)
11263         (when (or (not predicate)
11264                   (gnus-map-articles
11265                    predicate (gnus-summary-article-children)))
11266             (gnus-summary-hide-thread))
11267         (setq end (not (zerop (gnus-summary-next-thread 1 t)))))))
11268   (gnus-summary-position-point))
11269
11270 (defun gnus-summary-hide-thread ()
11271   "Hide thread subtrees.
11272 If PREDICATE is supplied, threads that satisfy this predicate
11273 will not be hidden.
11274 Returns nil if no threads were there to be hidden."
11275   (interactive)
11276   (let ((buffer-read-only nil)
11277         (start (point))
11278         (article (gnus-summary-article-number)))
11279     (goto-char start)
11280     ;; Go forward until either the buffer ends or the subthread ends.
11281     (when (and (not (eobp))
11282                (or (zerop (gnus-summary-next-thread 1 t))
11283                    (goto-char (point-max))))
11284       (prog1
11285           (if (and (> (point) start)
11286                    (search-backward "\n" start t))
11287               (progn
11288                 (subst-char-in-region start (point) ?\n ?\^M)
11289                 (gnus-summary-goto-subject article))
11290             (goto-char start)
11291             nil)))))
11292
11293 (defun gnus-summary-go-to-next-thread (&optional previous)
11294   "Go to the same level (or less) next thread.
11295 If PREVIOUS is non-nil, go to previous thread instead.
11296 Return the article number moved to, or nil if moving was impossible."
11297   (let ((level (gnus-summary-thread-level))
11298         (way (if previous -1 1))
11299         (beg (point)))
11300     (forward-line way)
11301     (while (and (not (eobp))
11302                 (< level (gnus-summary-thread-level)))
11303       (forward-line way))
11304     (if (eobp)
11305         (progn
11306           (goto-char beg)
11307           nil)
11308       (setq beg (point))
11309       (prog1
11310           (gnus-summary-article-number)
11311         (goto-char beg)))))
11312
11313 (defun gnus-summary-next-thread (n &optional silent)
11314   "Go to the same level next N'th thread.
11315 If N is negative, search backward instead.
11316 Returns the difference between N and the number of skips actually
11317 done.
11318
11319 If SILENT, don't output messages."
11320   (interactive "p")
11321   (let ((backward (< n 0))
11322         (n (abs n)))
11323     (while (and (> n 0)
11324                 (gnus-summary-go-to-next-thread backward))
11325       (decf n))
11326     (unless silent
11327       (gnus-summary-position-point))
11328     (when (and (not silent) (/= 0 n))
11329       (gnus-message 7 "No more threads"))
11330     n))
11331
11332 (defun gnus-summary-prev-thread (n)
11333   "Go to the same level previous N'th thread.
11334 Returns the difference between N and the number of skips actually
11335 done."
11336   (interactive "p")
11337   (gnus-summary-next-thread (- n)))
11338
11339 (defun gnus-summary-go-down-thread ()
11340   "Go down one level in the current thread."
11341   (let ((children (gnus-summary-article-children)))
11342     (when children
11343       (gnus-summary-goto-subject (car children)))))
11344
11345 (defun gnus-summary-go-up-thread ()
11346   "Go up one level in the current thread."
11347   (let ((parent (gnus-summary-article-parent)))
11348     (when parent
11349       (gnus-summary-goto-subject parent))))
11350
11351 (defun gnus-summary-down-thread (n)
11352   "Go down thread N steps.
11353 If N is negative, go up instead.
11354 Returns the difference between N and how many steps down that were
11355 taken."
11356   (interactive "p")
11357   (let ((up (< n 0))
11358         (n (abs n)))
11359     (while (and (> n 0)
11360                 (if up (gnus-summary-go-up-thread)
11361                   (gnus-summary-go-down-thread)))
11362       (setq n (1- n)))
11363     (gnus-summary-position-point)
11364     (when (/= 0 n)
11365       (gnus-message 7 "Can't go further"))
11366     n))
11367
11368 (defun gnus-summary-up-thread (n)
11369   "Go up thread N steps.
11370 If N is negative, go down instead.
11371 Returns the difference between N and how many steps down that were
11372 taken."
11373   (interactive "p")
11374   (gnus-summary-down-thread (- n)))
11375
11376 (defun gnus-summary-top-thread ()
11377   "Go to the top of the thread."
11378   (interactive)
11379   (while (gnus-summary-go-up-thread))
11380   (gnus-summary-article-number))
11381
11382 (defun gnus-summary-expire-thread ()
11383   "Mark articles under current thread as expired."
11384   (interactive)
11385   (gnus-summary-kill-thread 0))
11386
11387 (defun gnus-summary-kill-thread (&optional unmark)
11388   "Mark articles under current thread as read.
11389 If the prefix argument is positive, remove any kinds of marks.
11390 If the prefix argument is zero, mark thread as expired.
11391 If the prefix argument is negative, tick articles instead."
11392   (interactive "P")
11393   (when unmark
11394     (setq unmark (prefix-numeric-value unmark)))
11395   (let ((articles (gnus-summary-articles-in-thread))
11396         (hide (or (null unmark) (= unmark 0))))
11397     (save-excursion
11398       ;; Expand the thread.
11399       (gnus-summary-show-thread)
11400       ;; Mark all the articles.
11401       (while articles
11402         (gnus-summary-goto-subject (car articles))
11403         (cond ((null unmark)
11404                (gnus-summary-mark-article-as-read gnus-killed-mark))
11405               ((> unmark 0)
11406                (gnus-summary-mark-article-as-unread gnus-unread-mark))
11407               ((= unmark 0)
11408                (gnus-summary-mark-article-as-unread gnus-expirable-mark))
11409               (t
11410                (gnus-summary-mark-article-as-unread gnus-ticked-mark)))
11411         (setq articles (cdr articles))))
11412     ;; Hide killed subtrees when hide is true.
11413     (and hide
11414          gnus-thread-hide-killed
11415          (gnus-summary-hide-thread))
11416     ;; If hide is t, go to next unread subject.
11417     (when hide
11418       ;; Go to next unread subject.
11419       (gnus-summary-next-subject 1 t)))
11420   (gnus-set-mode-line 'summary))
11421
11422 ;; Summary sorting commands
11423
11424 (defun gnus-summary-sort-by-number (&optional reverse)
11425   "Sort the summary buffer by article number.
11426 Argument REVERSE means reverse order."
11427   (interactive "P")
11428   (gnus-summary-sort 'number reverse))
11429
11430 (defun gnus-summary-sort-by-random (&optional reverse)
11431   "Randomize the order in the summary buffer.
11432 Argument REVERSE means to randomize in reverse order."
11433   (interactive "P")
11434   (gnus-summary-sort 'random reverse))
11435
11436 (defun gnus-summary-sort-by-author (&optional reverse)
11437   "Sort the summary buffer by author name alphabetically.
11438 If `case-fold-search' is non-nil, case of letters is ignored.
11439 Argument REVERSE means reverse order."
11440   (interactive "P")
11441   (gnus-summary-sort 'author reverse))
11442
11443 (defun gnus-summary-sort-by-recipient (&optional reverse)
11444   "Sort the summary buffer by recipient name alphabetically.
11445 If `case-fold-search' is non-nil, case of letters is ignored.
11446 Argument REVERSE means reverse order."
11447   (interactive "P")
11448   (gnus-summary-sort 'recipient reverse))
11449
11450 (defun gnus-summary-sort-by-subject (&optional reverse)
11451   "Sort the summary buffer by subject alphabetically.  `Re:'s are ignored.
11452 If `case-fold-search' is non-nil, case of letters is ignored.
11453 Argument REVERSE means reverse order."
11454   (interactive "P")
11455   (gnus-summary-sort 'subject reverse))
11456
11457 (defun gnus-summary-sort-by-date (&optional reverse)
11458   "Sort the summary buffer by date.
11459 Argument REVERSE means reverse order."
11460   (interactive "P")
11461   (gnus-summary-sort 'date reverse))
11462
11463 (defun gnus-summary-sort-by-score (&optional reverse)
11464   "Sort the summary buffer by score.
11465 Argument REVERSE means reverse order."
11466   (interactive "P")
11467   (gnus-summary-sort 'score reverse))
11468
11469 (defun gnus-summary-sort-by-lines (&optional reverse)
11470   "Sort the summary buffer by the number of lines.
11471 Argument REVERSE means reverse order."
11472   (interactive "P")
11473   (gnus-summary-sort 'lines reverse))
11474
11475 (defun gnus-summary-sort-by-chars (&optional reverse)
11476   "Sort the summary buffer by article length.
11477 Argument REVERSE means reverse order."
11478   (interactive "P")
11479   (gnus-summary-sort 'chars reverse))
11480
11481 (defun gnus-summary-sort-by-original (&optional reverse)
11482   "Sort the summary buffer using the default sorting method.
11483 Argument REVERSE means reverse order."
11484   (interactive "P")
11485   (let* ((inhibit-read-only t)
11486          (gnus-summary-prepare-hook nil))
11487     ;; We do the sorting by regenerating the threads.
11488     (gnus-summary-prepare)
11489     ;; Hide subthreads if needed.
11490     (gnus-summary-maybe-hide-threads)))
11491
11492 (defun gnus-summary-sort (predicate reverse)
11493   "Sort summary buffer by PREDICATE.  REVERSE means reverse order."
11494   (let* ((thread (intern (format "gnus-thread-sort-by-%s" predicate)))
11495          (article (intern (format "gnus-article-sort-by-%s" predicate)))
11496          (gnus-thread-sort-functions
11497           (if (not reverse)
11498               thread
11499             `(lambda (t1 t2)
11500                (,thread t2 t1))))
11501          (gnus-sort-gathered-threads-function
11502           gnus-thread-sort-functions)
11503          (gnus-article-sort-functions
11504           (if (not reverse)
11505               article
11506             `(lambda (t1 t2)
11507                (,article t2 t1))))
11508          (inhibit-read-only t)
11509          (gnus-summary-prepare-hook nil))
11510     ;; We do the sorting by regenerating the threads.
11511     (gnus-summary-prepare)
11512     ;; Hide subthreads if needed.
11513     (gnus-summary-maybe-hide-threads)))
11514
11515 ;; Summary saving commands.
11516
11517 (defun gnus-summary-save-article (&optional n not-saved)
11518   "Save the current article using the default saver function.
11519 If N is a positive number, save the N next articles.
11520 If N is a negative number, save the N previous articles.
11521 If N is nil and any articles have been marked with the process mark,
11522 save those articles instead.
11523 The variable `gnus-default-article-saver' specifies the saver function.
11524
11525 If the optional second argument NOT-SAVED is non-nil, articles saved
11526 will not be marked as saved."
11527   (interactive "P")
11528   (require 'gnus-art)
11529   (let* ((articles (gnus-summary-work-articles n))
11530          (save-buffer (save-excursion
11531                         (nnheader-set-temp-buffer " *Gnus Save*")))
11532          (num (length articles))
11533          ;; Whether to save decoded articles or raw articles.
11534          (decode (when gnus-article-save-coding-system
11535                    (get gnus-default-article-saver :decode)))
11536          ;; When saving many articles in a single file, use the other
11537          ;; function to save articles other than the first one.
11538          (saver2 (get gnus-default-article-saver :function))
11539          (gnus-prompt-before-saving (if saver2
11540                                         t
11541                                       gnus-prompt-before-saving))
11542          (gnus-default-article-saver gnus-default-article-saver)
11543          header file)
11544     (dolist (article articles)
11545       (setq header (gnus-summary-article-header article))
11546       (if (not (vectorp header))
11547           ;; This is a pseudo-article.
11548           (if (assq 'name header)
11549               (gnus-copy-file (cdr (assq 'name header)))
11550             (gnus-message 1 "Article %d is unsaveable" article))
11551         ;; This is a real article.
11552         (save-window-excursion
11553           (let ((gnus-display-mime-function (when decode
11554                                               gnus-display-mime-function))
11555                 (gnus-article-prepare-hook (when decode
11556                                              gnus-article-prepare-hook)))
11557             (gnus-summary-select-article t nil nil article)
11558             (gnus-summary-goto-subject article)))
11559         (with-current-buffer save-buffer
11560           (erase-buffer)
11561           (insert-buffer-substring (if decode
11562                                        gnus-article-buffer
11563                                      gnus-original-article-buffer)))
11564         (setq file (gnus-article-save save-buffer file num))
11565         (gnus-summary-remove-process-mark article)
11566         (unless not-saved
11567           (gnus-summary-set-saved-mark article)))
11568       (when saver2
11569         (setq gnus-default-article-saver saver2
11570               saver2 nil)))
11571     (gnus-kill-buffer save-buffer)
11572     (gnus-summary-position-point)
11573     (gnus-set-mode-line 'summary)
11574     n))
11575
11576 (defun gnus-summary-pipe-output (&optional arg headers)
11577   "Pipe the current article to a subprocess.
11578 If N is a positive number, pipe the N next articles.
11579 If N is a negative number, pipe the N previous articles.
11580 If N is nil and any articles have been marked with the process mark,
11581 pipe those articles instead.
11582 If HEADERS (the symbolic prefix), include the headers, too."
11583   (interactive (gnus-interactive "P\ny"))
11584   (require 'gnus-art)
11585   (let ((gnus-default-article-saver 'gnus-summary-save-in-pipe)
11586         (gnus-save-all-headers (or headers gnus-save-all-headers)))
11587     (gnus-summary-save-article arg t))
11588   (let ((buffer (get-buffer "*Shell Command Output*")))
11589     (when (and buffer
11590                (not (zerop (buffer-size buffer))))
11591       (gnus-configure-windows 'pipe))))
11592
11593 (defun gnus-summary-save-article-mail (&optional arg)
11594   "Append the current article to a Unix mail box file.
11595 If N is a positive number, save the N next articles.
11596 If N is a negative number, save the N previous articles.
11597 If N is nil and any articles have been marked with the process mark,
11598 save those articles instead."
11599   (interactive "P")
11600   (require 'gnus-art)
11601   (let ((gnus-default-article-saver 'gnus-summary-save-in-mail))
11602     (gnus-summary-save-article arg)))
11603
11604 (defun gnus-summary-save-article-rmail (&optional arg)
11605   "Append the current article to an rmail file.
11606 If N is a positive number, save the N next articles.
11607 If N is a negative number, save the N previous articles.
11608 If N is nil and any articles have been marked with the process mark,
11609 save those articles instead."
11610   (interactive "P")
11611   (require 'gnus-art)
11612   (let ((gnus-default-article-saver 'gnus-summary-save-in-rmail))
11613     (gnus-summary-save-article arg)))
11614
11615 (defun gnus-summary-save-article-file (&optional arg)
11616   "Append the current article to a file.
11617 If N is a positive number, save the N next articles.
11618 If N is a negative number, save the N previous articles.
11619 If N is nil and any articles have been marked with the process mark,
11620 save those articles instead."
11621   (interactive "P")
11622   (require 'gnus-art)
11623   (let ((gnus-default-article-saver 'gnus-summary-save-in-file))
11624     (gnus-summary-save-article arg)))
11625
11626 (defun gnus-summary-write-article-file (&optional arg)
11627   "Write the current article to a file, deleting the previous file.
11628 If N is a positive number, save the N next articles.
11629 If N is a negative number, save the N previous articles.
11630 If N is nil and any articles have been marked with the process mark,
11631 save those articles instead."
11632   (interactive "P")
11633   (require 'gnus-art)
11634   (let ((gnus-default-article-saver 'gnus-summary-write-to-file))
11635     (gnus-summary-save-article arg)))
11636
11637 (defun gnus-summary-save-article-body-file (&optional arg)
11638   "Append the current article body to a file.
11639 If N is a positive number, save the N next articles.
11640 If N is a negative number, save the N previous articles.
11641 If N is nil and any articles have been marked with the process mark,
11642 save those articles instead."
11643   (interactive "P")
11644   (require 'gnus-art)
11645   (let ((gnus-default-article-saver 'gnus-summary-save-body-in-file))
11646     (gnus-summary-save-article arg)))
11647
11648 (defun gnus-summary-write-article-body-file (&optional arg)
11649   "Write the current article body to a file, deleting the previous file.
11650 If N is a positive number, save the N next articles.
11651 If N is a negative number, save the N previous articles.
11652 If N is nil and any articles have been marked with the process mark,
11653 save those articles instead."
11654   (interactive "P")
11655   (require 'gnus-art)
11656   (let ((gnus-default-article-saver 'gnus-summary-write-body-to-file))
11657     (gnus-summary-save-article arg)))
11658
11659 (defun gnus-summary-muttprint (&optional arg)
11660   "Print the current article using Muttprint.
11661 If N is a positive number, save the N next articles.
11662 If N is a negative number, save the N previous articles.
11663 If N is nil and any articles have been marked with the process mark,
11664 save those articles instead."
11665   (interactive "P")
11666   (require 'gnus-art)
11667   (let ((gnus-default-article-saver 'gnus-summary-pipe-to-muttprint))
11668     (gnus-summary-save-article arg t)))
11669
11670 (defun gnus-summary-pipe-message (program)
11671   "Pipe the current article through PROGRAM."
11672   (interactive "sProgram: ")
11673   (gnus-summary-select-article)
11674   (let ((mail-header-separator ""))
11675     (gnus-eval-in-buffer-window gnus-article-buffer
11676       (save-restriction
11677         (widen)
11678         (let ((start (window-start))
11679               (inhibit-read-only t))
11680           (message-pipe-buffer-body program)
11681           (set-window-start (get-buffer-window (current-buffer)) start))))))
11682
11683 (defun gnus-get-split-value (methods)
11684   "Return a value based on the split METHODS."
11685   (let (split-name method result match)
11686     (when methods
11687       (with-current-buffer gnus-original-article-buffer
11688         (save-restriction
11689           (nnheader-narrow-to-headers)
11690           (while (and methods (not split-name))
11691             (goto-char (point-min))
11692             (setq method (pop methods))
11693             (setq match (car method))
11694             (when (cond
11695                    ((stringp match)
11696                     ;; Regular expression.
11697                     (ignore-errors
11698                       (re-search-forward match nil t)))
11699                    ((functionp match)
11700                     ;; Function.
11701                     (save-restriction
11702                       (widen)
11703                       (setq result (funcall match gnus-newsgroup-name))))
11704                    ((consp match)
11705                     ;; Form.
11706                     (save-restriction
11707                       (widen)
11708                       (setq result (eval match)))))
11709               (setq split-name (cdr method))
11710               (cond ((stringp result)
11711                      (push (expand-file-name
11712                             result gnus-article-save-directory)
11713                            split-name))
11714                     ((consp result)
11715                      (setq split-name (append result split-name)))))))))
11716     (nreverse split-name)))
11717
11718 (defun gnus-valid-move-group-p (group)
11719   (and (boundp group)
11720        (symbol-name group)
11721        (symbol-value group)
11722        (gnus-get-function (gnus-find-method-for-group
11723                            (symbol-name group)) 'request-accept-article t)))
11724
11725 (defun gnus-read-move-group-name (prompt default articles prefix)
11726   "Read a group name."
11727   (let* ((split-name (gnus-get-split-value gnus-move-split-methods))
11728          (minibuffer-confirm-incomplete nil) ; XEmacs
11729          (prom
11730           (format "%s %s to"
11731                   prompt
11732                   (if (> (length articles) 1)
11733                       (format "these %d articles" (length articles))
11734                     "this article")))
11735          (to-newsgroup
11736           (let (active group)
11737             (when (or (null split-name) (= 1 (length split-name)))
11738               (setq active (gnus-make-hashtable (length gnus-active-hashtb)))
11739               (mapatoms (lambda (symbol)
11740                           (setq group (symbol-name symbol))
11741                           (when (string-match "[^\000-\177]" group)
11742                             (setq group (gnus-group-decoded-name group)))
11743                           (set (intern group active) group))
11744                         gnus-active-hashtb))
11745             (cond
11746              ((null split-name)
11747               (gnus-completing-read-with-default
11748                default prom active 'gnus-valid-move-group-p nil prefix
11749                'gnus-group-history))
11750              ((= 1 (length split-name))
11751               (gnus-completing-read-with-default
11752                (car split-name) prom active 'gnus-valid-move-group-p nil nil
11753                'gnus-group-history))
11754              (t
11755               (gnus-completing-read-with-default
11756                nil prom (mapcar 'list (nreverse split-name)) nil nil nil
11757                'gnus-group-history)))))
11758          (to-method (gnus-server-to-method (gnus-group-method to-newsgroup)))
11759          encoded)
11760     (when to-newsgroup
11761       (if (or (string= to-newsgroup "")
11762               (string= to-newsgroup prefix))
11763           (setq to-newsgroup default))
11764       (unless to-newsgroup
11765         (error "No group name entered"))
11766       (setq encoded (mm-encode-coding-string
11767                      to-newsgroup
11768                      (gnus-group-name-charset to-method to-newsgroup)))
11769       (or (gnus-active encoded)
11770           (gnus-activate-group encoded nil nil to-method)
11771           (if (gnus-y-or-n-p (format "No such group: %s.  Create it? "
11772                                      to-newsgroup))
11773               (or (and (gnus-request-create-group encoded to-method)
11774                        (gnus-activate-group encoded nil nil to-method)
11775                        (gnus-subscribe-group encoded))
11776                   (error "Couldn't create group %s" to-newsgroup)))
11777           (error "No such group: %s" to-newsgroup))
11778       encoded)))
11779
11780 (defvar gnus-summary-save-parts-counter)
11781 (declare-function mm-uu-dissect "mm-uu" (&optional noheader mime-type))
11782
11783 (defun gnus-summary-save-parts (type dir n &optional reverse)
11784   "Save parts matching TYPE to DIR.
11785 If REVERSE, save parts that do not match TYPE."
11786   (interactive
11787    (list (read-string "Save parts of type: "
11788                       (or (car gnus-summary-save-parts-type-history)
11789                           gnus-summary-save-parts-default-mime)
11790                       'gnus-summary-save-parts-type-history)
11791          (setq gnus-summary-save-parts-last-directory
11792                (read-file-name "Save to directory: "
11793                                gnus-summary-save-parts-last-directory
11794                                nil t))
11795          current-prefix-arg))
11796   (gnus-summary-iterate n
11797     (let ((gnus-display-mime-function nil)
11798           (gnus-inhibit-treatment t))
11799       (gnus-summary-select-article))
11800     (with-current-buffer gnus-article-buffer
11801       (let ((handles (or gnus-article-mime-handles
11802                          (mm-dissect-buffer nil gnus-article-loose-mime)
11803                          (and gnus-article-emulate-mime
11804                               (mm-uu-dissect))))
11805             (gnus-summary-save-parts-counter 1))
11806         (when handles
11807           (gnus-summary-save-parts-1 type dir handles reverse)
11808           (unless gnus-article-mime-handles ;; Don't destroy this case.
11809             (mm-destroy-parts handles)))))))
11810
11811 (defun gnus-summary-save-parts-1 (type dir handle reverse)
11812   (if (stringp (car handle))
11813       (mapcar (lambda (h) (gnus-summary-save-parts-1 type dir h reverse))
11814               (cdr handle))
11815     (when (if reverse
11816               (not (string-match type (mm-handle-media-type handle)))
11817             (string-match type (mm-handle-media-type handle)))
11818       (let ((file (expand-file-name
11819                    (gnus-map-function
11820                     mm-file-name-rewrite-functions
11821                     (file-name-nondirectory
11822                      (or
11823                       (mail-content-type-get
11824                        (mm-handle-disposition handle) 'filename)
11825                       (mail-content-type-get
11826                        (mm-handle-type handle) 'name)
11827                       (format "%s.%d.%d" gnus-newsgroup-name
11828                               (cdr gnus-article-current)
11829                               gnus-summary-save-parts-counter))))
11830                    dir)))
11831         (incf gnus-summary-save-parts-counter)
11832         (unless (file-exists-p file)
11833           (mm-save-part-to-file handle file))))))
11834
11835 ;; Summary extract commands
11836
11837 (defun gnus-summary-insert-pseudos (pslist &optional not-view)
11838   (let ((inhibit-read-only t)
11839         (article (gnus-summary-article-number))
11840         after-article b e)
11841     (unless (gnus-summary-goto-subject article)
11842       (error "No such article: %d" article))
11843     (gnus-summary-position-point)
11844     ;; If all commands are to be bunched up on one line, we collect
11845     ;; them here.
11846     (unless gnus-view-pseudos-separately
11847       (let ((ps (setq pslist (sort pslist 'gnus-pseudos<)))
11848             files action)
11849         (while ps
11850           (setq action (cdr (assq 'action (car ps))))
11851           (setq files (list (cdr (assq 'name (car ps)))))
11852           (while (and ps (cdr ps)
11853                       (string= (or action "1")
11854                                (or (cdr (assq 'action (cadr ps))) "2")))
11855             (push (cdr (assq 'name (cadr ps))) files)
11856             (setcdr ps (cddr ps)))
11857           (when files
11858             (when (not (string-match "%s" action))
11859               (push " " files))
11860             (push " " files)
11861             (when (assq 'execute (car ps))
11862               (setcdr (assq 'execute (car ps))
11863                       (funcall (if (string-match "%s" action)
11864                                    'format 'concat)
11865                                action
11866                                (mapconcat
11867                                 (lambda (f)
11868                                   (if (equal f " ")
11869                                       f
11870                                     (shell-quote-argument f)))
11871                                 files " ")))))
11872           (setq ps (cdr ps)))))
11873     (if (and gnus-view-pseudos (not not-view))
11874         (while pslist
11875           (when (assq 'execute (car pslist))
11876             (gnus-execute-command (cdr (assq 'execute (car pslist)))
11877                                   (eq gnus-view-pseudos 'not-confirm)))
11878           (setq pslist (cdr pslist)))
11879       (save-excursion
11880         (while pslist
11881           (setq after-article (or (cdr (assq 'article (car pslist)))
11882                                   (gnus-summary-article-number)))
11883           (gnus-summary-goto-subject after-article)
11884           (forward-line 1)
11885           (setq b (point))
11886           (insert "    " (file-name-nondirectory
11887                           (cdr (assq 'name (car pslist))))
11888                   ": " (or (cdr (assq 'execute (car pslist))) "") "\n")
11889           (setq e (point))
11890           (forward-line -1)             ; back to `b'
11891           (gnus-add-text-properties
11892            b (1- e) (list 'gnus-number gnus-reffed-article-number
11893                           gnus-mouse-face-prop gnus-mouse-face))
11894           (gnus-data-enter
11895            after-article gnus-reffed-article-number
11896            gnus-unread-mark b (car pslist) 0 (- e b))
11897           (setq gnus-newsgroup-unreads
11898                 (gnus-add-to-sorted-list gnus-newsgroup-unreads
11899                                          gnus-reffed-article-number))
11900           (setq gnus-reffed-article-number (1- gnus-reffed-article-number))
11901           (setq pslist (cdr pslist)))))))
11902
11903 (defun gnus-pseudos< (p1 p2)
11904   (let ((c1 (cdr (assq 'action p1)))
11905         (c2 (cdr (assq 'action p2))))
11906     (and c1 c2 (string< c1 c2))))
11907
11908 (defun gnus-request-pseudo-article (props)
11909   (cond ((assq 'execute props)
11910          (gnus-execute-command (cdr (assq 'execute props)))))
11911   (let ((gnus-current-article (gnus-summary-article-number)))
11912     (gnus-run-hooks 'gnus-mark-article-hook)))
11913
11914 (defun gnus-execute-command (command &optional automatic)
11915   (save-excursion
11916     (gnus-article-setup-buffer)
11917     (set-buffer gnus-article-buffer)
11918     (setq buffer-read-only nil)
11919     (let ((command (if automatic command
11920                      (read-string "Command: " (cons command 0)))))
11921       (erase-buffer)
11922       (insert "$ " command "\n\n")
11923       (if gnus-view-pseudo-asynchronously
11924           (start-process "gnus-execute" (current-buffer) shell-file-name
11925                          shell-command-switch command)
11926         (call-process shell-file-name nil t nil
11927                       shell-command-switch command)))))
11928
11929 ;; Summary kill commands.
11930
11931 (defun gnus-summary-edit-global-kill (article)
11932   "Edit the \"global\" kill file."
11933   (interactive (list (gnus-summary-article-number)))
11934   (gnus-group-edit-global-kill article))
11935
11936 (defun gnus-summary-edit-local-kill ()
11937   "Edit a local kill file applied to the current newsgroup."
11938   (interactive)
11939   (setq gnus-current-headers (gnus-summary-article-header))
11940   (gnus-group-edit-local-kill
11941    (gnus-summary-article-number) gnus-newsgroup-name))
11942
11943 ;;; Header reading.
11944
11945 (defun gnus-read-header (id &optional header)
11946   "Read the headers of article ID and enter them into the Gnus system."
11947   (let ((group gnus-newsgroup-name)
11948         (gnus-override-method
11949          (or
11950           gnus-override-method
11951           (and (gnus-news-group-p gnus-newsgroup-name)
11952                (car (gnus-refer-article-methods)))))
11953         where)
11954     ;; First we check to see whether the header in question is already
11955     ;; fetched.
11956     (if (stringp id)
11957         ;; This is a Message-ID.
11958         (setq header (or header (gnus-id-to-header id)))
11959       ;; This is an article number.
11960       (setq header (or header (gnus-summary-article-header id))))
11961     (if (and header
11962              (not (gnus-summary-article-sparse-p (mail-header-number header))))
11963         ;; We have found the header.
11964         header
11965       ;; We have to really fetch the header to this article.
11966       (with-current-buffer nntp-server-buffer
11967         (when (setq where (gnus-request-head id group))
11968           (nnheader-fold-continuation-lines)
11969           (goto-char (point-max))
11970           (insert ".\n")
11971           (goto-char (point-min))
11972           (insert "211 ")
11973           (princ (cond
11974                   ((numberp id) id)
11975                   ((cdr where) (cdr where))
11976                   (header (mail-header-number header))
11977                   (t gnus-reffed-article-number))
11978                  (current-buffer))
11979           (insert " Article retrieved.\n"))
11980         (if (or (not where)
11981                 (not (setq header (car (gnus-get-newsgroup-headers nil t)))))
11982             ()                          ; Malformed head.
11983           (unless (gnus-summary-article-sparse-p (mail-header-number header))
11984             (when (and (stringp id)
11985                        (or
11986                         (not (string= (gnus-group-real-name group)
11987                                       (car where)))
11988                         (not (gnus-server-equal gnus-override-method
11989                                                 (gnus-group-method group)))))
11990               ;; If we fetched by Message-ID and the article came from
11991               ;; a different group (or server), we fudge some bogus
11992               ;; article numbers for this article.
11993               (mail-header-set-number header gnus-reffed-article-number))
11994             (with-current-buffer gnus-summary-buffer
11995               (decf gnus-reffed-article-number)
11996               (gnus-remove-header (mail-header-number header))
11997               (push header gnus-newsgroup-headers)
11998               (setq gnus-current-headers header)
11999               (push (mail-header-number header) gnus-newsgroup-limit)))
12000           header)))))
12001
12002 (defun gnus-remove-header (number)
12003   "Remove header NUMBER from `gnus-newsgroup-headers'."
12004   (if (and gnus-newsgroup-headers
12005            (= number (mail-header-number (car gnus-newsgroup-headers))))
12006       (pop gnus-newsgroup-headers)
12007     (let ((headers gnus-newsgroup-headers))
12008       (while (and (cdr headers)
12009                   (not (= number (mail-header-number (cadr headers)))))
12010         (pop headers))
12011       (when (cdr headers)
12012         (setcdr headers (cddr headers))))))
12013
12014 ;;;
12015 ;;; summary highlights
12016 ;;;
12017
12018 (defun gnus-highlight-selected-summary ()
12019   "Highlight selected article in summary buffer."
12020   ;; Added by Per Abrahamsen <amanda@iesd.auc.dk>.
12021   (when gnus-summary-selected-face
12022     (save-excursion
12023       (let* ((beg (point-at-bol))
12024              (end (point-at-eol))
12025              ;; Fix by Mike Dugan <dugan@bucrf16.bu.edu>.
12026              (from (if (get-text-property beg gnus-mouse-face-prop)
12027                        beg
12028                      (or (next-single-property-change
12029                           beg gnus-mouse-face-prop nil end)
12030                          beg)))
12031              (to
12032               (if (= from end)
12033                   (- from 2)
12034                 (or (next-single-property-change
12035                      from gnus-mouse-face-prop nil end)
12036                     end))))
12037         ;; If no mouse-face prop on line we will have to = from = end,
12038         ;; so we highlight the entire line instead.
12039         (when (= (+ to 2) from)
12040           (setq from beg)
12041           (setq to end))
12042         (if gnus-newsgroup-selected-overlay
12043             ;; Move old overlay.
12044             (gnus-move-overlay
12045              gnus-newsgroup-selected-overlay from to (current-buffer))
12046           ;; Create new overlay.
12047           (gnus-overlay-put
12048            (setq gnus-newsgroup-selected-overlay (gnus-make-overlay from to))
12049            'face gnus-summary-selected-face))))))
12050
12051 (defvar gnus-summary-highlight-line-cached nil)
12052 (defvar gnus-summary-highlight-line-trigger nil)
12053
12054 (defun gnus-summary-highlight-line-0 ()
12055   (if (and (eq gnus-summary-highlight-line-trigger
12056                gnus-summary-highlight)
12057            gnus-summary-highlight-line-cached)
12058       gnus-summary-highlight-line-cached
12059     (setq gnus-summary-highlight-line-trigger gnus-summary-highlight
12060           gnus-summary-highlight-line-cached
12061           (let* ((cond (list 'cond))
12062                  (c cond)
12063                  (list gnus-summary-highlight))
12064             (while list
12065               (setcdr c (cons (list (caar list) (list 'quote (cdar list)))
12066                               nil))
12067               (setq c (cdr c)
12068                     list (cdr list)))
12069             (gnus-byte-compile (list 'lambda nil cond))))))
12070
12071 (defun gnus-summary-highlight-line ()
12072   "Highlight current line according to `gnus-summary-highlight'."
12073   (let* ((beg (point-at-bol))
12074          (article (or (gnus-summary-article-number) gnus-current-article))
12075          (score (or (cdr (assq article
12076                                gnus-newsgroup-scored))
12077                     gnus-summary-default-score 0))
12078          (mark (or (gnus-summary-article-mark) gnus-unread-mark))
12079          (inhibit-read-only t)
12080          (default gnus-summary-default-score)
12081          (default-high gnus-summary-default-high-score)
12082          (default-low gnus-summary-default-low-score)
12083          (uncached (and gnus-summary-use-undownloaded-faces
12084                         (memq article gnus-newsgroup-undownloaded)
12085                         (not (memq article gnus-newsgroup-cached)))))
12086     (let ((face (funcall (gnus-summary-highlight-line-0))))
12087       (unless (eq face (get-text-property beg 'face))
12088         (gnus-put-text-property-excluding-characters-with-faces
12089          beg (point-at-eol) 'face
12090          (setq face (if (boundp face) (symbol-value face) face)))
12091         (when gnus-summary-highlight-line-function
12092           (funcall gnus-summary-highlight-line-function article face))))))
12093
12094 (defun gnus-update-read-articles (group unread &optional compute)
12095   "Update the list of read articles in GROUP.
12096 UNREAD is a sorted list."
12097   (let ((active (or gnus-newsgroup-active (gnus-active group)))
12098         (info (gnus-get-info group))
12099         (prev 1)
12100         read)
12101     (if (or (not info) (not active))
12102         ;; There is no info on this group if it was, in fact,
12103         ;; killed.  Gnus stores no information on killed groups, so
12104         ;; there's nothing to be done.
12105         ;; One could store the information somewhere temporarily,
12106         ;; perhaps...  Hmmm...
12107         ()
12108       ;; Remove any negative articles numbers.
12109       (while (and unread (< (car unread) 0))
12110         (setq unread (cdr unread)))
12111       ;; Remove any expired article numbers
12112       (while (and unread (< (car unread) (car active)))
12113         (setq unread (cdr unread)))
12114       ;; Compute the ranges of read articles by looking at the list of
12115       ;; unread articles.
12116       (while unread
12117         (when (/= (car unread) prev)
12118           (push (if (= prev (1- (car unread))) prev
12119                   (cons prev (1- (car unread))))
12120                 read))
12121         (setq prev (1+ (car unread)))
12122         (setq unread (cdr unread)))
12123       (when (<= prev (cdr active))
12124         (push (cons prev (cdr active)) read))
12125       (setq read (if (> (length read) 1) (nreverse read) read))
12126       (if compute
12127           read
12128         (save-excursion
12129           (let (setmarkundo)
12130             ;; Propagate the read marks to the backend.
12131             (when (gnus-check-backend-function 'request-set-mark group)
12132               (let ((del (gnus-remove-from-range (gnus-info-read info) read))
12133                     (add (gnus-remove-from-range read (gnus-info-read info))))
12134                 (when (or add del)
12135                   (unless (gnus-check-group group)
12136                     (error "Can't open server for %s" group))
12137                   (gnus-request-set-mark
12138                    group (delq nil (list (if add (list add 'add '(read)))
12139                                          (if del (list del 'del '(read))))))
12140                   (setq setmarkundo
12141                         `(gnus-request-set-mark
12142                           ,group
12143                           ',(delq nil (list
12144                                        (if del (list del 'add '(read)))
12145                                        (if add (list add 'del '(read))))))))))
12146             (set-buffer gnus-group-buffer)
12147             (gnus-undo-register
12148               `(progn
12149                  (gnus-info-set-marks ',info ',(gnus-info-marks info) t)
12150                  (gnus-info-set-read ',info ',(gnus-info-read info))
12151                  (gnus-get-unread-articles-in-group ',info
12152                                                     (gnus-active ,group))
12153                  (gnus-group-update-group ,group t)
12154                  ,setmarkundo))))
12155         ;; Enter this list into the group info.
12156         (gnus-info-set-read info read)
12157         ;; Set the number of unread articles in gnus-newsrc-hashtb.
12158         (gnus-get-unread-articles-in-group info (gnus-active group))
12159         t))))
12160
12161 (defun gnus-offer-save-summaries ()
12162   "Offer to save all active summary buffers."
12163   (let (buffers)
12164     ;; Go through all buffers and find all summaries.
12165     (dolist (buffer (buffer-list))
12166       (when (and (setq buffer (buffer-name buffer))
12167                  (string-match "Summary" buffer)
12168                  (with-current-buffer buffer
12169                    ;; We check that this is, indeed, a summary buffer.
12170                    (and (eq major-mode 'gnus-summary-mode)
12171                         ;; Also make sure this isn't bogus.
12172                         gnus-newsgroup-prepared
12173                         ;; Also make sure that this isn't a
12174                         ;; dead summary buffer.
12175                         (not gnus-dead-summary-mode))))
12176         (push buffer buffers)))
12177     ;; Go through all these summary buffers and offer to save them.
12178     (when buffers
12179       (save-excursion
12180         (map-y-or-n-p
12181          "Update summary buffer %s? "
12182          (lambda (buf)
12183            (switch-to-buffer buf)
12184            (gnus-summary-exit))
12185          buffers)))))
12186
12187 (defun gnus-summary-setup-default-charset ()
12188   "Setup newsgroup default charset."
12189   (if (member gnus-newsgroup-name '("nndraft:delayed" "nndraft:drafts"))
12190       (setq gnus-newsgroup-charset nil)
12191     (let* ((ignored-charsets
12192             (or gnus-newsgroup-ephemeral-ignored-charsets
12193                 (append
12194                  (and gnus-newsgroup-name
12195                       (gnus-parameter-ignored-charsets gnus-newsgroup-name))
12196                  gnus-newsgroup-ignored-charsets))))
12197       (setq gnus-newsgroup-charset
12198             (or gnus-newsgroup-ephemeral-charset
12199                 (and gnus-newsgroup-name
12200                      (gnus-parameter-charset gnus-newsgroup-name))
12201                 gnus-default-charset))
12202       (set (make-local-variable 'gnus-newsgroup-ignored-charsets)
12203            ignored-charsets))))
12204
12205 ;;;
12206 ;;; Mime Commands
12207 ;;;
12208
12209 (defun gnus-summary-display-buttonized (&optional show-all-parts)
12210   "Display the current article buffer fully MIME-buttonized.
12211 If SHOW-ALL-PARTS (the prefix) is non-nil, all multipart/* parts are
12212 treated as multipart/mixed."
12213   (interactive "P")
12214   (require 'gnus-art)
12215   (let ((gnus-unbuttonized-mime-types nil)
12216         (gnus-mime-display-multipart-as-mixed show-all-parts))
12217     (gnus-summary-show-article)))
12218
12219 (defun gnus-summary-repair-multipart (article)
12220   "Add a Content-Type header to a multipart article without one."
12221   (interactive (list (gnus-summary-article-number)))
12222   (gnus-with-article article
12223     (message-narrow-to-head)
12224     (message-remove-header "Mime-Version")
12225     (goto-char (point-max))
12226     (insert "Mime-Version: 1.0\n")
12227     (widen)
12228     (when (search-forward "\n--" nil t)
12229       (let ((separator (buffer-substring (point) (point-at-eol))))
12230         (message-narrow-to-head)
12231         (message-remove-header "Content-Type")
12232         (goto-char (point-max))
12233         (insert (format "Content-Type: multipart/mixed; boundary=\"%s\"\n"
12234                         separator))
12235         (widen))))
12236   (let (gnus-mark-article-hook)
12237     (gnus-summary-select-article t t nil article)))
12238
12239 (defun gnus-summary-toggle-display-buttonized ()
12240   "Toggle the buttonizing of the article buffer."
12241   (interactive)
12242   (require 'gnus-art)
12243   (if (setq gnus-inhibit-mime-unbuttonizing
12244             (not gnus-inhibit-mime-unbuttonizing))
12245       (let ((gnus-unbuttonized-mime-types nil))
12246         (gnus-summary-show-article))
12247     (gnus-summary-show-article)))
12248
12249 ;;;
12250 ;;; Generic summary marking commands
12251 ;;;
12252
12253 (defvar gnus-summary-marking-alist
12254   '((read gnus-del-mark "d")
12255     (unread gnus-unread-mark "u")
12256     (ticked gnus-ticked-mark "!")
12257     (dormant gnus-dormant-mark "?")
12258     (expirable gnus-expirable-mark "e"))
12259   "An alist of names/marks/keystrokes.")
12260
12261 (defvar gnus-summary-generic-mark-map (make-sparse-keymap))
12262 (defvar gnus-summary-mark-map)
12263
12264 (defun gnus-summary-make-all-marking-commands ()
12265   (define-key gnus-summary-mark-map "M" gnus-summary-generic-mark-map)
12266   (dolist (elem gnus-summary-marking-alist)
12267     (apply 'gnus-summary-make-marking-command elem)))
12268
12269 (defun gnus-summary-make-marking-command (name mark keystroke)
12270   (let ((map (make-sparse-keymap)))
12271     (define-key gnus-summary-generic-mark-map keystroke map)
12272     (dolist (lway `((next "next" next nil "n")
12273                     (next-unread "next unread" next t "N")
12274                     (prev "previous" prev nil "p")
12275                     (prev-unread "previous unread" prev t "P")
12276                     (nomove "" nil nil ,keystroke)))
12277       (let ((func (gnus-summary-make-marking-command-1
12278                    mark (car lway) lway name)))
12279         (setq func (eval func))
12280         (define-key map (nth 4 lway) func)))))
12281
12282 (defun gnus-summary-make-marking-command-1 (mark way lway name)
12283   `(defun ,(intern
12284             (format "gnus-summary-put-mark-as-%s%s"
12285                     name (if (eq way 'nomove)
12286                              ""
12287                            (concat "-" (symbol-name way)))))
12288      (n)
12289      ,(format
12290        "Mark the current article as %s%s.
12291 If N, the prefix, then repeat N times.
12292 If N is negative, move in reverse order.
12293 The difference between N and the actual number of articles marked is
12294 returned."
12295        name (cadr lway))
12296      (interactive "p")
12297      (gnus-summary-generic-mark n ,mark ',(nth 2 lway) ,(nth 3 lway))))
12298
12299 (defun gnus-summary-generic-mark (n mark move unread)
12300   "Mark N articles with MARK."
12301   (unless (eq major-mode 'gnus-summary-mode)
12302     (error "This command can only be used in the summary buffer"))
12303   (gnus-summary-show-thread)
12304   (let ((nummove
12305          (cond
12306           ((eq move 'next) 1)
12307           ((eq move 'prev) -1)
12308           (t 0))))
12309     (if (zerop nummove)
12310         (setq n 1)
12311       (when (< n 0)
12312         (setq n (abs n)
12313               nummove (* -1 nummove))))
12314     (while (and (> n 0)
12315                 (gnus-summary-mark-article nil mark)
12316                 (zerop (gnus-summary-next-subject nummove unread t)))
12317       (setq n (1- n)))
12318     (when (/= 0 n)
12319       (gnus-message 7 "No more %sarticles" (if mark "" "unread ")))
12320     (gnus-summary-recenter)
12321     (gnus-summary-position-point)
12322     (gnus-set-mode-line 'summary)
12323     n))
12324
12325 (defun gnus-summary-insert-articles (articles)
12326   (when (setq articles
12327               (gnus-sorted-difference articles
12328                                       (mapcar (lambda (h)
12329                                                 (mail-header-number h))
12330                                               gnus-newsgroup-headers)))
12331     (setq gnus-newsgroup-headers
12332           (gnus-merge 'list
12333                       gnus-newsgroup-headers
12334                       (gnus-fetch-headers articles)
12335                       'gnus-article-sort-by-number))
12336     ;; Suppress duplicates?
12337     (when gnus-suppress-duplicates
12338       (gnus-dup-suppress-articles))
12339
12340     (if (and gnus-fetch-old-headers
12341              (eq gnus-headers-retrieved-by 'nov))
12342         ;; We might want to build some more threads first.
12343         (if (eq gnus-fetch-old-headers 'invisible)
12344             (gnus-build-all-threads)
12345           (gnus-build-old-threads))
12346       ;; Mark the inserted articles that are unread as unread.
12347       (setq gnus-newsgroup-unreads
12348             (gnus-sorted-nunion
12349              gnus-newsgroup-unreads
12350              (gnus-sorted-nintersection
12351               (gnus-list-of-unread-articles gnus-newsgroup-name)
12352               articles)))
12353       ;; Mark the inserted articles as selected so that the information
12354       ;; of the marks having been changed by a user may be updated when
12355       ;; exiting this group.  See `gnus-summary-update-info'.
12356       (dolist (art articles)
12357         (setq gnus-newsgroup-unselected (delq art gnus-newsgroup-unselected))))
12358     ;; Let the Gnus agent mark articles as read.
12359     (when gnus-agent
12360       (gnus-agent-get-undownloaded-list))
12361     ;; Remove list identifiers from subject
12362     (when gnus-list-identifiers
12363       (gnus-summary-remove-list-identifiers))
12364     ;; First and last article in this newsgroup.
12365     (when gnus-newsgroup-headers
12366       (setq gnus-newsgroup-begin
12367             (mail-header-number (car gnus-newsgroup-headers))
12368             gnus-newsgroup-end
12369             (mail-header-number
12370              (gnus-last-element gnus-newsgroup-headers))))
12371     (when gnus-use-scoring
12372       (gnus-possibly-score-headers))))
12373
12374 (defun gnus-summary-insert-old-articles (&optional all)
12375   "Insert all old articles in this group.
12376 If ALL is non-nil, already read articles become readable.
12377 If ALL is a number, fetch this number of articles."
12378   (interactive "P")
12379   (prog1
12380       (let ((old (sort (mapcar 'car gnus-newsgroup-data) '<))
12381             older len)
12382         (setq older
12383               ;; Some nntp servers lie about their active range.  When
12384               ;; this happens, the active range can be in the millions.
12385               ;; Use a compressed range to avoid creating a huge list.
12386               (gnus-range-difference (list gnus-newsgroup-active) old))
12387         (setq len (gnus-range-length older))
12388         (cond
12389          ((null older) nil)
12390          ((numberp all)
12391           (if (< all len)
12392               (let ((older-range (nreverse older)))
12393                 (setq older nil)
12394
12395                 (while (> all 0)
12396                   (let* ((r (pop older-range))
12397                          (min (if (numberp r) r (car r)))
12398                          (max (if (numberp r) r (cdr r))))
12399                     (while (and (<= min max)
12400                                 (> all 0))
12401                       (push max older)
12402                       (setq all (1- all)
12403                             max (1- max))))))
12404             (setq older (gnus-uncompress-range older))))
12405          (all
12406           (setq older (gnus-uncompress-range older)))
12407          (t
12408           (when (and (numberp gnus-large-newsgroup)
12409                    (> len gnus-large-newsgroup))
12410               (let* ((cursor-in-echo-area nil)
12411                      (initial (gnus-parameter-large-newsgroup-initial
12412                                gnus-newsgroup-name))
12413                      (input
12414                       (read-string
12415                        (format
12416                         "How many articles from %s (%s %d): "
12417                         (gnus-group-decoded-name gnus-newsgroup-name)
12418                         (if initial "max" "default")
12419                         len)
12420                        (if initial
12421                            (cons (number-to-string initial)
12422                                  0)))))
12423                 (unless (string-match "^[ \t]*$" input)
12424                   (setq all (string-to-number input))
12425                   (if (< all len)
12426                       (let ((older-range (nreverse older)))
12427                         (setq older nil)
12428
12429                         (while (> all 0)
12430                           (let* ((r (pop older-range))
12431                                  (min (if (numberp r) r (car r)))
12432                                  (max (if (numberp r) r (cdr r))))
12433                             (while (and (<= min max)
12434                                         (> all 0))
12435                               (push max older)
12436                               (setq all (1- all)
12437                                     max (1- max))))))))))
12438           (setq older (gnus-uncompress-range older))))
12439         (if (not older)
12440             (message "No old news.")
12441           (gnus-summary-insert-articles older)
12442           (gnus-summary-limit (gnus-sorted-nunion old older))))
12443     (gnus-summary-position-point)))
12444
12445 (defun gnus-summary-insert-new-articles ()
12446   "Insert all new articles in this group."
12447   (interactive)
12448   (prog1
12449       (let ((old (sort (mapcar 'car gnus-newsgroup-data) '<))
12450             (old-active gnus-newsgroup-active)
12451             (nnmail-fetched-sources (list t))
12452             i new)
12453         (setq gnus-newsgroup-active
12454               (gnus-activate-group gnus-newsgroup-name 'scan))
12455         (setq i (cdr gnus-newsgroup-active))
12456         (while (> i (cdr old-active))
12457           (push i new)
12458           (decf i))
12459         (if (not new)
12460             (message "No gnus is bad news")
12461           (gnus-summary-insert-articles new)
12462           (setq gnus-newsgroup-unreads
12463                 (gnus-sorted-nunion gnus-newsgroup-unreads new))
12464           (gnus-summary-limit (gnus-sorted-nunion old new))))
12465     (gnus-summary-position-point)))
12466
12467 (gnus-summary-make-all-marking-commands)
12468
12469 (gnus-ems-redefine)
12470
12471 (provide 'gnus-sum)
12472
12473 (run-hooks 'gnus-sum-load-hook)
12474
12475 ;; Local Variables:
12476 ;; coding: iso-8859-1
12477 ;; End:
12478
12479 ;; arch-tag: 17c6748f-6d00-4d36-bf01-835c42f31235
12480 ;;; gnus-sum.el ends here