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 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 2, 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 (eval-when-compile
  31   (require 'cl)
  32   (defvar tool-bar-map))
  33
  34 (require 'gnus)
  35 (require 'gnus-group)
  36 (require 'gnus-spec)
  37 (require 'gnus-range)
  38 (require 'gnus-int)
  39 (require 'gnus-undo)
  40 (require 'gnus-util)
  41 (require 'mm-decode)
  42 (require 'nnoo)
  43
  44 (autoload 'gnus-summary-limit-include-cached "gnus-cache" nil t)
  45 (autoload 'gnus-cache-write-active "gnus-cache")
  46 (autoload 'gnus-mailing-list-insinuate "gnus-ml" nil t)
  47 (autoload 'turn-on-gnus-mailing-list-mode "gnus-ml" nil t)
  48 (autoload 'gnus-pick-line-number "gnus-salt" nil t)
  49 (autoload 'mm-uu-dissect "mm-uu")
  50 (autoload 'gnus-article-outlook-deuglify-article "deuglify"
  51   "Deuglify broken Outlook (Express) articles and redisplay."
  52   t)
  53 (autoload 'gnus-article-outlook-unwrap-lines "deuglify" nil t)
  54 (autoload 'gnus-article-outlook-repair-attribution "deuglify" nil t)
  55 (autoload 'gnus-article-outlook-rearrange-citation "deuglify" nil t)
  56
  57 (defcustom gnus-kill-summary-on-exit t
  58   "*If non-nil, kill the summary buffer when you exit from it.
  59 If nil, the summary will become a \"*Dead Summary*\" buffer, and
  60 it will be killed sometime later."
  61   :group 'gnus-summary-exit
  62   :type 'boolean)
  63
  64 (defcustom gnus-fetch-old-headers nil
  65   "*Non-nil means that Gnus will try to build threads by grabbing old headers.
  66 If an unread article in the group refers to an older, already read (or
  67 just marked as read) article, the old article will not normally be
  68 displayed in the Summary buffer.  If this variable is t, Gnus
  69 will attempt to grab the headers to the old articles, and thereby
  70 build complete threads.  If it has the value `some', only enough
  71 headers to connect otherwise loose threads will be displayed.  This
  72 variable can also be a number.  In that case, no more than that number
  73 of old headers will be fetched.  If it has the value `invisible', all
  74 old headers will be fetched, but none will be displayed.
  75
  76 The server has to support NOV for any of this to work."
  77   :group 'gnus-thread
  78   :type '(choice (const :tag "off" nil)
  79                  (const :tag "on" t)
  80                  (const some)
  81                  (const invisible)
  82                  number
  83                  (sexp :menu-tag "other" t)))
  84
  85 (defcustom gnus-refer-thread-limit 200
  86   "*The number of old headers to fetch when doing \\<gnus-summary-mode-map>\\[gnus-summary-refer-thread].
  87 If t, fetch all the available old headers."
  88   :group 'gnus-thread
  89   :type '(choice number
  90                  (sexp :menu-tag "other" t)))
  91
  92 (defcustom gnus-summary-make-false-root 'adopt
  93   "*nil means that Gnus won't gather loose threads.
  94 If the root of a thread has expired or been read in a previous
  95 session, the information necessary to build a complete thread has been
  96 lost.  Instead of having many small sub-threads from this original thread
  97 scattered all over the summary buffer, Gnus can gather them.
  98
  99 If non-nil, Gnus will try to gather all loose sub-threads from an
 100 original thread into one large thread.
 101
 102 If this variable is non-nil, it should be one of `none', `adopt',
 103 `dummy' or `empty'.
 104
 105 If this variable is `none', Gnus will not make a false root, but just
 106 present the sub-threads after another.
 107 If this variable is `dummy', Gnus will create a dummy root that will
 108 have all the sub-threads as children.
 109 If this variable is `adopt', Gnus will make one of the \"children\"
 110 the parent and mark all the step-children as such.
 111 If this variable is `empty', the \"children\" are printed with empty
 112 subject fields.  (Or rather, they will be printed with a string
 113 given by the `gnus-summary-same-subject' variable.)"
 114   :group 'gnus-thread
 115   :type '(choice (const :tag "off" nil)
 116                  (const none)
 117                  (const dummy)
 118                  (const adopt)
 119                  (const empty)))
 120
 121 (defcustom gnus-summary-make-false-root-always nil
 122   "Always make a false dummy root."
 123   :version "22.1"
 124   :group 'gnus-thread
 125   :type 'boolean)
 126
 127 (defcustom gnus-summary-gather-exclude-subject "^ *$\\|^(none)$"
 128   "*A regexp to match subjects to be excluded from loose thread gathering.
 129 As loose thread gathering is done on subjects only, that means that
 130 there can be many false gatherings performed.  By rooting out certain
 131 common subjects, gathering might become saner."
 132   :group 'gnus-thread
 133   :type 'regexp)
 134
 135 (defcustom gnus-summary-gather-subject-limit nil
 136   "*Maximum length of subject comparisons when gathering loose threads.
 137 Use nil to compare full subjects.  Setting this variable to a low
 138 number will help gather threads that have been corrupted by
 139 newsreaders chopping off subject lines, but it might also mean that
 140 unrelated articles that have subject that happen to begin with the
 141 same few characters will be incorrectly gathered.
 142
 143 If this variable is `fuzzy', Gnus will use a fuzzy algorithm when
 144 comparing subjects."
 145   :group 'gnus-thread
 146   :type '(choice (const :tag "off" nil)
 147                  (const fuzzy)
 148                  (sexp :menu-tag "on" t)))
 149
 150 (defcustom gnus-simplify-subject-functions nil
 151   "List of functions taking a string argument that simplify subjects.
 152 The functions are applied recursively.
 153
 154 Useful functions to put in this list include:
 155 `gnus-simplify-subject-re', `gnus-simplify-subject-fuzzy',
 156 `gnus-simplify-whitespace', and `gnus-simplify-all-whitespace'."
 157   :group 'gnus-thread
 158   :type '(repeat function))
 159
 160 (defcustom gnus-simplify-ignored-prefixes nil
 161   "*Remove matches for this regexp from subject lines when simplifying fuzzily."
 162   :group 'gnus-thread
 163   :type '(choice (const :tag "off" nil)
 164                  regexp))
 165
 166 (defcustom gnus-build-sparse-threads nil
 167   "*If non-nil, fill in the gaps in threads.
 168 If `some', only fill in the gaps that are needed to tie loose threads
 169 together.  If `more', fill in all leaf nodes that Gnus can find.  If
 170 non-nil and non-`some', fill in all gaps that Gnus manages to guess."
 171   :group 'gnus-thread
 172   :type '(choice (const :tag "off" nil)
 173                  (const some)
 174                  (const more)
 175                  (sexp :menu-tag "all" t)))
 176
 177 (defcustom gnus-summary-thread-gathering-function
 178   'gnus-gather-threads-by-subject
 179   "*Function used for gathering loose threads.
 180 There are two pre-defined functions: `gnus-gather-threads-by-subject',
 181 which only takes Subjects into consideration; and
 182 `gnus-gather-threads-by-references', which compared the References
 183 headers of the articles to find matches."
 184   :group 'gnus-thread
 185   :type '(radio (function-item gnus-gather-threads-by-subject)
 186                 (function-item gnus-gather-threads-by-references)
 187                 (function :tag "other")))
 188
 189 (defcustom gnus-summary-same-subject ""
 190   "*String indicating that the current article has the same subject as the previous.
 191 This variable will only be used if the value of
 192 `gnus-summary-make-false-root' is `empty'."
 193   :group 'gnus-summary-format
 194   :type 'string)
 195
 196 (defcustom gnus-summary-goto-unread t
 197   "*If t, many commands will go to the next unread article.
 198 This applies to marking commands as well as other commands that
 199 \"naturally\" select the next article, like, for instance, `SPC' at
 200 the end of an article.
 201
 202 If nil, the marking commands do NOT go to the next unread article
 203 \(they go to the next article instead).  If `never', commands that
 204 usually go to the next unread article, will go to the next article,
 205 whether it is read or not."
 206   :group 'gnus-summary-marks
 207   :link '(custom-manual "(gnus)Setting Marks")
 208   :type '(choice (const :tag "off" nil)
 209                  (const never)
 210                  (sexp :menu-tag "on" t)))
 211
 212 (defcustom gnus-summary-default-score 0
 213   "*Default article score level.
 214 All scores generated by the score files will be added to this score.
 215 If this variable is nil, scoring will be disabled."
 216   :group 'gnus-score-default
 217   :type '(choice (const :tag "disable")
 218                  integer))
 219
 220 (defcustom gnus-summary-default-high-score 0
 221   "*Default threshold for a high scored article.
 222 An article will be highlighted as high scored if its score is greater
 223 than this score."
 224   :version "22.1"
 225   :group 'gnus-score-default
 226   :type 'integer)
 227
 228 (defcustom gnus-summary-default-low-score 0
 229   "*Default threshold for a low scored article.
 230 An article will be highlighted as low scored if its score is smaller
 231 than this score."
 232   :version "22.1"
 233   :group 'gnus-score-default
 234   :type 'integer)
 235
 236 (defcustom gnus-summary-zcore-fuzz 0
 237   "*Fuzziness factor for the zcore in the summary buffer.
 238 Articles with scores closer than this to `gnus-summary-default-score'
 239 will not be marked."
 240   :group 'gnus-summary-format
 241   :type 'integer)
 242
 243 (defcustom gnus-simplify-subject-fuzzy-regexp nil
 244   "*Strings to be removed when doing fuzzy matches.
 245 This can either be a regular expression or list of regular expressions
 246 that will be removed from subject strings if fuzzy subject
 247 simplification is selected."
 248   :group 'gnus-thread
 249   :type '(repeat regexp))
 250
 251 (defcustom gnus-show-threads t
 252   "*If non-nil, display threads in summary mode."
 253   :group 'gnus-thread
 254   :type 'boolean)
 255
 256 (defcustom gnus-thread-hide-subtree nil
 257   "*If non-nil, hide all threads initially.
 258 This can be a predicate specifier which says which threads to hide.
 259 If threads are hidden, you have to run the command
 260 `gnus-summary-show-thread' by hand or select an article."
 261   :group 'gnus-thread
 262   :type '(radio (sexp :format "Non-nil\n"
 263                       :match (lambda (widget value)
 264                                (not (or (consp value) (functionp value))))
 265                       :value t)
 266                 (const nil)
 267                 (sexp :tag "Predicate specifier")))
 268
 269 (defcustom gnus-thread-hide-killed t
 270   "*If non-nil, hide killed threads automatically."
 271   :group 'gnus-thread
 272   :type 'boolean)
 273
 274 (defcustom gnus-thread-ignore-subject t
 275   "*If non-nil, which is the default, ignore subjects and do all threading based on the Reference header.
 276 If nil, articles that have different subjects from their parents will
 277 start separate threads."
 278   :group 'gnus-thread
 279   :type 'boolean)
 280
 281 (defcustom gnus-thread-operation-ignore-subject t
 282   "*If non-nil, subjects will be ignored when doing thread commands.
 283 This affects commands like `gnus-summary-kill-thread' and
 284 `gnus-summary-lower-thread'.
 285
 286 If this variable is nil, articles in the same thread with different
 287 subjects will not be included in the operation in question.  If this
 288 variable is `fuzzy', only articles that have subjects that are fuzzily
 289 equal will be included."
 290   :group 'gnus-thread
 291   :type '(choice (const :tag "off" nil)
 292                  (const fuzzy)
 293                  (sexp :tag "on" t)))
 294
 295 (defcustom gnus-thread-indent-level 4
 296   "*Number that says how much each sub-thread should be indented."
 297   :group 'gnus-thread
 298   :type 'integer)
 299
 300 (defcustom gnus-auto-extend-newsgroup t
 301   "*If non-nil, extend newsgroup forward and backward when requested."
 302   :group 'gnus-summary-choose
 303   :type 'boolean)
 304
 305 (defcustom gnus-auto-select-first t
 306   "*If non-nil, select the article under point.
 307 Which article this is is controlled by the `gnus-auto-select-subject'
 308 variable.
 309
 310 If you want to prevent automatic selection of articles in some
 311 newsgroups, set the variable to nil in `gnus-select-group-hook'."
 312   :group 'gnus-group-select
 313   :type '(choice (const :tag "none" nil)
 314                  (sexp :menu-tag "first" t)))
 315
 316 (defcustom gnus-auto-select-subject 'unread
 317   "*Says what subject to place under point when entering a group.
 318
 319 This variable can either be the symbols `first' (place point on the
 320 first subject), `unread' (place point on the subject line of the first
 321 unread article), `best' (place point on the subject line of the
 322 higest-scored article), `unseen' (place point on the subject line of
 323 the first unseen article), `unseen-or-unread' (place point on the subject
 324 line of the first unseen article or, if all article have been seen, on the
 325 subject line of the first unread article), or a function to be called to
 326 place point on some subject line."
 327   :version "22.1"
 328   :group 'gnus-group-select
 329   :type '(choice (const best)
 330                  (const unread)
 331                  (const first)
 332                  (const unseen)
 333                  (const unseen-or-unread)))
 334
 335 (defcustom gnus-auto-select-next t
 336   "*If non-nil, offer to go to the next group from the end of the previous.
 337 If the value is t and the next newsgroup is empty, Gnus will exit
 338 summary mode and go back to group mode.  If the value is neither nil
 339 nor t, Gnus will select the following unread newsgroup.  In
 340 particular, if the value is the symbol `quietly', the next unread
 341 newsgroup will be selected without any confirmation, and if it is
 342 `almost-quietly', the next group will be selected without any
 343 confirmation if you are located on the last article in the group.
 344 Finally, if this variable is `slightly-quietly', the `\\<gnus-summary-mode-map>\\[gnus-summary-catchup-and-goto-next-group]' command
 345 will go to the next group without confirmation."
 346   :group 'gnus-summary-maneuvering
 347   :type '(choice (const :tag "off" nil)
 348                  (const quietly)
 349                  (const almost-quietly)
 350                  (const slightly-quietly)
 351                  (sexp :menu-tag "on" t)))
 352
 353 (defcustom gnus-auto-select-same nil
 354   "*If non-nil, select the next article with the same subject.
 355 If there are no more articles with the same subject, go to
 356 the first unread article."
 357   :group 'gnus-summary-maneuvering
 358   :type 'boolean)
 359
 360 (defcustom gnus-auto-goto-ignores 'unfetched
 361   "*Says how to handle unfetched articles when maneuvering.
 362
 363 This variable can either be the symbols nil (maneuver to any
 364 article), `undownloaded' (maneuvering while unplugged ignores articles
 365 that have not been fetched), `always-undownloaded' (maneuvering always
 366 ignores articles that have not been fetched), `unfetched' (maneuvering
 367 ignores articles whose headers have not been fetched).
 368
 369 NOTE: The list of unfetched articles will always be nil when plugged
 370 and, when unplugged, a subset of the undownloaded article list."
 371   :version "22.1"
 372   :group 'gnus-summary-maneuvering
 373   :type '(choice (const :tag "None" nil)
 374                  (const :tag "Undownloaded when unplugged" undownloaded)
 375                  (const :tag "Undownloaded" always-undownloaded)
 376                  (const :tag "Unfetched" unfetched)))
 377
 378 (defcustom gnus-summary-check-current nil
 379   "*If non-nil, consider the current article when moving.
 380 The \"unread\" movement commands will stay on the same line if the
 381 current article is unread."
 382   :group 'gnus-summary-maneuvering
 383   :type 'boolean)
 384
 385 (defcustom gnus-auto-center-summary t
 386   "*If non-nil, always center the current summary buffer.
 387 In particular, if `vertical' do only vertical recentering.  If non-nil
 388 and non-`vertical', do both horizontal and vertical recentering."
 389   :group 'gnus-summary-maneuvering
 390   :type '(choice (const :tag "none" nil)
 391                  (const vertical)
 392                  (integer :tag "height")
 393                  (sexp :menu-tag "both" t)))
 394
 395 (defvar gnus-auto-center-group t
 396   "*If non-nil, always center the group buffer.")
 397
 398 (defcustom gnus-show-all-headers nil
 399   "*If non-nil, don't hide any headers."
 400   :group 'gnus-article-hiding
 401   :group 'gnus-article-headers
 402   :type 'boolean)
 403
 404 (defcustom gnus-summary-ignore-duplicates nil
 405   "*If non-nil, ignore articles with identical Message-ID headers."
 406   :group 'gnus-summary
 407   :type 'boolean)
 408
 409 (defcustom gnus-single-article-buffer t
 410   "*If non-nil, display all articles in the same buffer.
 411 If nil, each group will get its own article buffer."
 412   :group 'gnus-article-various
 413   :type 'boolean)
 414
 415 (defcustom gnus-break-pages t
 416   "*If non-nil, do page breaking on articles.
 417 The page delimiter is specified by the `gnus-page-delimiter'
 418 variable."
 419   :group 'gnus-article-various
 420   :type 'boolean)
 421
 422 (defcustom gnus-move-split-methods nil
 423   "*Variable used to suggest where articles are to be moved to.
 424 It uses the same syntax as the `gnus-split-methods' variable.
 425 However, whereas `gnus-split-methods' specifies file names as targets,
 426 this variable specifies group names."
 427   :group 'gnus-summary-mail
 428   :type '(repeat (choice (list :value (fun) function)
 429                          (cons :value ("" "") regexp (repeat string))
 430                          (sexp :value nil))))
 431
 432 ;; FIXME: Although the custom type is `character' for the following variables,
 433 ;; using multibyte characters (Latin-1, UTF-8) doesn't work.  -- rs
 434
 435 (defcustom gnus-unread-mark ?           ;Whitespace
 436   "*Mark used for unread articles."
 437   :group 'gnus-summary-marks
 438   :type 'character)
 439
 440 (defcustom gnus-ticked-mark ?!
 441   "*Mark used for ticked articles."
 442   :group 'gnus-summary-marks
 443   :type 'character)
 444
 445 (defcustom gnus-dormant-mark ??
 446   "*Mark used for dormant articles."
 447   :group 'gnus-summary-marks
 448   :type 'character)
 449
 450 (defcustom gnus-del-mark ?r
 451   "*Mark used for del'd articles."
 452   :group 'gnus-summary-marks
 453   :type 'character)
 454
 455 (defcustom gnus-read-mark ?R
 456   "*Mark used for read articles."
 457   :group 'gnus-summary-marks
 458   :type 'character)
 459
 460 (defcustom gnus-expirable-mark ?E
 461   "*Mark used for expirable articles."
 462   :group 'gnus-summary-marks
 463   :type 'character)
 464
 465 (defcustom gnus-killed-mark ?K
 466   "*Mark used for killed articles."
 467   :group 'gnus-summary-marks
 468   :type 'character)
 469
 470 (defcustom gnus-spam-mark ?$
 471   "*Mark used for spam articles."
 472   :version "22.1"
 473   :group 'gnus-summary-marks
 474   :type 'character)
 475
 476 (defcustom gnus-souped-mark ?F
 477   "*Mark used for souped articles."
 478   :group 'gnus-summary-marks
 479   :type 'character)
 480
 481 (defcustom gnus-kill-file-mark ?X
 482   "*Mark used for articles killed by kill files."
 483   :group 'gnus-summary-marks
 484   :type 'character)
 485
 486 (defcustom gnus-low-score-mark ?Y
 487   "*Mark used for articles with a low score."
 488   :group 'gnus-summary-marks
 489   :type 'character)
 490
 491 (defcustom gnus-catchup-mark ?C
 492   "*Mark used for articles that are caught up."
 493   :group 'gnus-summary-marks
 494   :type 'character)
 495
 496 (defcustom gnus-replied-mark ?A
 497   "*Mark used for articles that have been replied to."
 498   :group 'gnus-summary-marks
 499   :type 'character)
 500
 501 (defcustom gnus-forwarded-mark ?F
 502   "*Mark used for articles that have been forwarded."
 503   :version "22.1"
 504   :group 'gnus-summary-marks
 505   :type 'character)
 506
 507 (defcustom gnus-recent-mark ?N
 508   "*Mark used for articles that are recent."
 509   :version "22.1"
 510   :group 'gnus-summary-marks
 511   :type 'character)
 512
 513 (defcustom gnus-cached-mark ?*
 514   "*Mark used for articles that are in the cache."
 515   :group 'gnus-summary-marks
 516   :type 'character)
 517
 518 (defcustom gnus-saved-mark ?S
 519   "*Mark used for articles that have been saved."
 520   :group 'gnus-summary-marks
 521   :type 'character)
 522
 523 (defcustom gnus-unseen-mark ?.
 524   "*Mark used for articles that haven't been seen."
 525   :version "22.1"
 526   :group 'gnus-summary-marks
 527   :type 'character)
 528
 529 (defcustom gnus-no-mark ?               ;Whitespace
 530   "*Mark used for articles that have no other secondary mark."
 531   :version "22.1"
 532   :group 'gnus-summary-marks
 533   :type 'character)
 534
 535 (defcustom gnus-ancient-mark ?O
 536   "*Mark used for ancient articles."
 537   :group 'gnus-summary-marks
 538   :type 'character)
 539
 540 (defcustom gnus-sparse-mark ?Q
 541   "*Mark used for sparsely reffed articles."
 542   :group 'gnus-summary-marks
 543   :type 'character)
 544
 545 (defcustom gnus-canceled-mark ?G
 546   "*Mark used for canceled articles."
 547   :group 'gnus-summary-marks
 548   :type 'character)
 549
 550 (defcustom gnus-duplicate-mark ?M
 551   "*Mark used for duplicate articles."
 552   :group 'gnus-summary-marks
 553   :type 'character)
 554
 555 (defcustom gnus-undownloaded-mark ?-
 556   "*Mark used for articles that weren't downloaded."
 557   :version "22.1"
 558   :group 'gnus-summary-marks
 559   :type 'character)
 560
 561 (defcustom gnus-downloaded-mark ?+
 562   "*Mark used for articles that were downloaded."
 563   :group 'gnus-summary-marks
 564   :type 'character)
 565
 566 (defcustom gnus-downloadable-mark ?%
 567   "*Mark used for articles that are to be downloaded."
 568   :group 'gnus-summary-marks
 569   :type 'character)
 570
 571 (defcustom gnus-unsendable-mark ?=
 572   "*Mark used for articles that won't be sent."
 573   :group 'gnus-summary-marks
 574   :type 'character)
 575
 576 (defcustom gnus-score-over-mark ?+
 577   "*Score mark used for articles with high scores."
 578   :group 'gnus-summary-marks
 579   :type 'character)
 580
 581 (defcustom gnus-score-below-mark ?-
 582   "*Score mark used for articles with low scores."
 583   :group 'gnus-summary-marks
 584   :type 'character)
 585
 586 (defcustom gnus-empty-thread-mark ?     ;Whitespace
 587   "*There is no thread under the article."
 588   :group 'gnus-summary-marks
 589   :type 'character)
 590
 591 (defcustom gnus-not-empty-thread-mark ?=
 592   "*There is a thread under the article."
 593   :group 'gnus-summary-marks
 594   :type 'character)
 595
 596 (defcustom gnus-view-pseudo-asynchronously nil
 597   "*If non-nil, Gnus will view pseudo-articles asynchronously."
 598   :group 'gnus-extract-view
 599   :type 'boolean)
 600
 601 (defcustom gnus-auto-expirable-marks
 602   (list gnus-killed-mark gnus-del-mark gnus-catchup-mark
 603         gnus-low-score-mark gnus-ancient-mark gnus-read-mark
 604         gnus-souped-mark gnus-duplicate-mark)
 605   "*The list of marks converted into expiration if a group is auto-expirable."
 606   :version "21.1"
 607   :group 'gnus-summary
 608   :type '(repeat character))
 609
 610 (defcustom gnus-inhibit-user-auto-expire t
 611   "*If non-nil, user marking commands will not mark an article as expirable, even if the group has auto-expire turned on."
 612   :version "21.1"
 613   :group 'gnus-summary
 614   :type 'boolean)
 615
 616 (defcustom gnus-view-pseudos nil
 617   "*If `automatic', pseudo-articles will be viewed automatically.
 618 If `not-confirm', pseudos will be viewed automatically, and the user
 619 will not be asked to confirm the command."
 620   :group 'gnus-extract-view
 621   :type '(choice (const :tag "off" nil)
 622                  (const automatic)
 623                  (const not-confirm)))
 624
 625 (defcustom gnus-view-pseudos-separately t
 626   "*If non-nil, one pseudo-article will be created for each file to be viewed.
 627 If nil, all files that use the same viewing command will be given as a
 628 list of parameters to that command."
 629   :group 'gnus-extract-view
 630   :type 'boolean)
 631
 632 (defcustom gnus-insert-pseudo-articles t
 633   "*If non-nil, insert pseudo-articles when decoding articles."
 634   :group 'gnus-extract-view
 635   :type 'boolean)
 636
 637 (defcustom gnus-summary-dummy-line-format
 638   "   %(:                             :%) %S\n"
 639   "*The format specification for the dummy roots in the summary buffer.
 640 It works along the same lines as a normal formatting string,
 641 with some simple extensions.
 642
 643 %S  The subject
 644
 645 General format specifiers can also be used.
 646 See `(gnus)Formatting Variables'."
 647   :link '(custom-manual "(gnus)Formatting Variables")
 648   :group 'gnus-threading
 649   :type 'string)
 650
 651 (defcustom gnus-summary-mode-line-format "Gnus: %g [%A] %Z"
 652   "*The format specification for the summary mode line.
 653 It works along the same lines as a normal formatting string,
 654 with some simple extensions:
 655
 656 %G  Group name
 657 %p  Unprefixed group name
 658 %A  Current article number
 659 %z  Current article score
 660 %V  Gnus version
 661 %U  Number of unread articles in the group
 662 %e  Number of unselected articles in the group
 663 %Z  A string with unread/unselected article counts
 664 %g  Shortish group name
 665 %S  Subject of the current article
 666 %u  User-defined spec
 667 %s  Current score file name
 668 %d  Number of dormant articles
 669 %r  Number of articles that have been marked as read in this session
 670 %E  Number of articles expunged by the score files"
 671   :group 'gnus-summary-format
 672   :type 'string)
 673
 674 (defcustom gnus-list-identifiers nil
 675   "Regexp that matches list identifiers to be removed from subject.
 676 This can also be a list of regexps."
 677   :version "21.1"
 678   :group 'gnus-summary-format
 679   :group 'gnus-article-hiding
 680   :type '(choice (const :tag "none" nil)
 681                  (regexp :value ".*")
 682                  (repeat :value (".*") regexp)))
 683
 684 (defcustom gnus-summary-mark-below 0
 685   "*Mark all articles with a score below this variable as read.
 686 This variable is local to each summary buffer and usually set by the
 687 score file."
 688   :group 'gnus-score-default
 689   :type 'integer)
 690
 691 (defcustom gnus-article-sort-functions '(gnus-article-sort-by-number)
 692   "*List of functions used for sorting articles in the summary buffer.
 693
 694 Each function takes two articles and returns non-nil if the first
 695 article should be sorted before the other.  If you use more than one
 696 function, the primary sort function should be the last.  You should
 697 probably always include `gnus-article-sort-by-number' in the list of
 698 sorting functions -- preferably first.  Also note that sorting by date
 699 is often much slower than sorting by number, and the sorting order is
 700 very similar.  (Sorting by date means sorting by the time the message
 701 was sent, sorting by number means sorting by arrival time.)
 702
 703 Ready-made functions include `gnus-article-sort-by-number',
 704 `gnus-article-sort-by-author', `gnus-article-sort-by-subject',
 705 `gnus-article-sort-by-date', `gnus-article-sort-by-random'
 706 and `gnus-article-sort-by-score'.
 707
 708 When threading is turned on, the variable `gnus-thread-sort-functions'
 709 controls how articles are sorted."
 710   :group 'gnus-summary-sort
 711   :type '(repeat (choice (function-item gnus-article-sort-by-number)
 712                          (function-item gnus-article-sort-by-author)
 713                          (function-item gnus-article-sort-by-subject)
 714                          (function-item gnus-article-sort-by-date)
 715                          (function-item gnus-article-sort-by-score)
 716                          (function-item gnus-article-sort-by-random)
 717                          (function :tag "other"))))
 718
 719 (defcustom gnus-thread-sort-functions '(gnus-thread-sort-by-number)
 720   "*List of functions used for sorting threads in the summary buffer.
 721 By default, threads are sorted by article number.
 722
 723 Each function takes two threads and returns non-nil if the first
 724 thread should be sorted before the other.  If you use more than one
 725 function, the primary sort function should be the last.  You should
 726 probably always include `gnus-thread-sort-by-number' in the list of
 727 sorting functions -- preferably first.  Also note that sorting by date
 728 is often much slower than sorting by number, and the sorting order is
 729 very similar.  (Sorting by date means sorting by the time the message
 730 was sent, sorting by number means sorting by arrival time.)
 731
 732 Ready-made functions include `gnus-thread-sort-by-number',
 733 `gnus-thread-sort-by-author', `gnus-thread-sort-by-subject',
 734 `gnus-thread-sort-by-date', `gnus-thread-sort-by-score',
 735 `gnus-thread-sort-by-most-recent-number',
 736 `gnus-thread-sort-by-most-recent-date',
 737 `gnus-thread-sort-by-random', and
 738 `gnus-thread-sort-by-total-score' (see `gnus-thread-score-function').
 739
 740 When threading is turned off, the variable
 741 `gnus-article-sort-functions' controls how articles are sorted."
 742   :group 'gnus-summary-sort
 743   :type '(repeat (choice (function-item gnus-thread-sort-by-number)
 744                          (function-item gnus-thread-sort-by-author)
 745                          (function-item gnus-thread-sort-by-subject)
 746                          (function-item gnus-thread-sort-by-date)
 747                          (function-item gnus-thread-sort-by-score)
 748                          (function-item gnus-thread-sort-by-total-score)
 749                          (function-item gnus-thread-sort-by-random)
 750                          (function :tag "other"))))
 751
 752 (defcustom gnus-thread-score-function '+
 753   "*Function used for calculating the total score of a thread.
 754
 755 The function is called with the scores of the article and each
 756 subthread and should then return the score of the thread.
 757
 758 Some functions you can use are `+', `max', or `min'."
 759   :group 'gnus-summary-sort
 760   :type 'function)
 761
 762 (defcustom gnus-summary-expunge-below nil
 763   "All articles that have a score less than this variable will be expunged.
 764 This variable is local to the summary buffers."
 765   :group 'gnus-score-default
 766   :type '(choice (const :tag "off" nil)
 767                  integer))
 768
 769 (defcustom gnus-thread-expunge-below nil
 770   "All threads that have a total score less than this variable will be expunged.
 771 See `gnus-thread-score-function' for en explanation of what a
 772 \"thread score\" is.
 773
 774 This variable is local to the summary buffers."
 775   :group 'gnus-threading
 776   :group 'gnus-score-default
 777   :type '(choice (const :tag "off" nil)
 778                  integer))
 779
 780 (defcustom gnus-summary-mode-hook nil
 781   "*A hook for Gnus summary mode.
 782 This hook is run before any variables are set in the summary buffer."
 783   :options '(turn-on-gnus-mailing-list-mode gnus-pick-mode)
 784   :group 'gnus-summary-various
 785   :type 'hook)
 786
 787 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
 788 (when (featurep 'xemacs)
 789   (add-hook 'gnus-summary-mode-hook 'gnus-xmas-summary-menu-add)
 790   (add-hook 'gnus-summary-mode-hook 'gnus-xmas-setup-summary-toolbar)
 791   (add-hook 'gnus-summary-mode-hook
 792             'gnus-xmas-switch-horizontal-scrollbar-off))
 793
 794 (defcustom gnus-summary-menu-hook nil
 795   "*Hook run after the creation of the summary mode menu."
 796   :group 'gnus-summary-visual
 797   :type 'hook)
 798
 799 (defcustom gnus-summary-exit-hook nil
 800   "*A hook called on exit from the summary buffer.
 801 It will be called with point in the group buffer."
 802   :group 'gnus-summary-exit
 803   :type 'hook)
 804
 805 (defcustom gnus-summary-prepare-hook nil
 806   "*A hook called after the summary buffer has been generated.
 807 If you want to modify the summary buffer, you can use this hook."
 808   :group 'gnus-summary-various
 809   :type 'hook)
 810
 811 (defcustom gnus-summary-prepared-hook nil
 812   "*A hook called as the last thing after the summary buffer has been generated."
 813   :group 'gnus-summary-various
 814   :type 'hook)
 815
 816 (defcustom gnus-summary-generate-hook nil
 817   "*A hook run just before generating the summary buffer.
 818 This hook is commonly used to customize threading variables and the
 819 like."
 820   :group 'gnus-summary-various
 821   :type 'hook)
 822
 823 (defcustom gnus-select-group-hook nil
 824   "*A hook called when a newsgroup is selected.
 825
 826 If you'd like to simplify subjects like the
 827 `gnus-summary-next-same-subject' command does, you can use the
 828 following hook:
 829
 830  (add-hook gnus-select-group-hook
 831            (lambda ()
 832              (mapcar (lambda (header)
 833                        (mail-header-set-subject
 834                         header
 835                         (gnus-simplify-subject
 836                          (mail-header-subject header) 're-only)))
 837                      gnus-newsgroup-headers)))"
 838   :group 'gnus-group-select
 839   :type 'hook)
 840
 841 (defcustom gnus-select-article-hook nil
 842   "*A hook called when an article is selected."
 843   :group 'gnus-summary-choose
 844   :options '(gnus-agent-fetch-selected-article)
 845   :type 'hook)
 846
 847 (defcustom gnus-visual-mark-article-hook
 848   (list 'gnus-highlight-selected-summary)
 849   "*Hook run after selecting an article in the summary buffer.
 850 It is meant to be used for highlighting the article in some way.  It
 851 is not run if `gnus-visual' is nil."
 852   :group 'gnus-summary-visual
 853   :type 'hook)
 854
 855 (defcustom gnus-parse-headers-hook nil
 856   "*A hook called before parsing the headers."
 857   :group 'gnus-various
 858   :type 'hook)
 859
 860 (defcustom gnus-exit-group-hook nil
 861   "*A hook called when exiting summary mode.
 862 This hook is not called from the non-updating exit commands like `Q'."
 863   :group 'gnus-various
 864   :type 'hook)
 865
 866 (defcustom gnus-summary-update-hook
 867   (list 'gnus-summary-highlight-line)
 868   "*A hook called when a summary line is changed.
 869 The hook will not be called if `gnus-visual' is nil.
 870
 871 The default function `gnus-summary-highlight-line' will
 872 highlight the line according to the `gnus-summary-highlight'
 873 variable."
 874   :group 'gnus-summary-visual
 875   :type 'hook)
 876
 877 (defcustom gnus-mark-article-hook '(gnus-summary-mark-read-and-unread-as-read)
 878   "*A hook called when an article is selected for the first time.
 879 The hook is intended to mark an article as read (or unread)
 880 automatically when it is selected."
 881   :group 'gnus-summary-choose
 882   :type 'hook)
 883
 884 (defcustom gnus-group-no-more-groups-hook nil
 885   "*A hook run when returning to group mode having no more (unread) groups."
 886   :group 'gnus-group-select
 887   :type 'hook)
 888
 889 (defcustom gnus-ps-print-hook nil
 890   "*A hook run before ps-printing something from Gnus."
 891   :group 'gnus-summary
 892   :type 'hook)
 893
 894 (defcustom gnus-summary-article-move-hook nil
 895   "*A hook called after an article is moved, copied, respooled, or crossposted."
 896   :version "22.1"
 897   :group 'gnus-summary
 898   :type 'hook)
 899
 900 (defcustom gnus-summary-article-delete-hook nil
 901   "*A hook called after an article is deleted."
 902   :version "22.1"
 903   :group 'gnus-summary
 904   :type 'hook)
 905
 906 (defcustom gnus-summary-article-expire-hook nil
 907   "*A hook called after an article is expired."
 908   :version "22.1"
 909   :group 'gnus-summary
 910   :type 'hook)
 911
 912 (defcustom gnus-summary-display-arrow
 913   (and (fboundp 'display-graphic-p)
 914        (display-graphic-p))
 915   "*If non-nil, display an arrow highlighting the current article."
 916   :version "22.1"
 917   :group 'gnus-summary
 918   :type 'boolean)
 919
 920 (defcustom gnus-summary-selected-face 'gnus-summary-selected
 921   "Face used for highlighting the current article in the summary buffer."
 922   :group 'gnus-summary-visual
 923   :type 'face)
 924
 925 (defvar gnus-tmp-downloaded nil)
 926
 927 (defcustom gnus-summary-highlight
 928   '(((eq mark gnus-canceled-mark)
 929      . gnus-summary-cancelled)
 930     ((and uncached (> score default-high))
 931      . gnus-summary-high-undownloaded)
 932     ((and uncached (< score default-low))
 933      . gnus-summary-low-undownloaded)
 934     (uncached
 935      . gnus-summary-normal-undownloaded)
 936     ((and (> score default-high)
 937           (or (eq mark gnus-dormant-mark)
 938               (eq mark gnus-ticked-mark)))
 939      . gnus-summary-high-ticked)
 940     ((and (< score default-low)
 941           (or (eq mark gnus-dormant-mark)
 942               (eq mark gnus-ticked-mark)))
 943      . gnus-summary-low-ticked)
 944     ((or (eq mark gnus-dormant-mark)
 945          (eq mark gnus-ticked-mark))
 946      . gnus-summary-normal-ticked)
 947     ((and (> score default-high) (eq mark gnus-ancient-mark))
 948      . gnus-summary-high-ancient)
 949     ((and (< score default-low) (eq mark gnus-ancient-mark))
 950      . gnus-summary-low-ancient)
 951     ((eq mark gnus-ancient-mark)
 952      . gnus-summary-normal-ancient)
 953     ((and (> score default-high) (eq mark gnus-unread-mark))
 954      . gnus-summary-high-unread)
 955     ((and (< score default-low) (eq mark gnus-unread-mark))
 956      . gnus-summary-low-unread)
 957     ((eq mark gnus-unread-mark)
 958      . gnus-summary-normal-unread)
 959     ((> score default-high)
 960      . gnus-summary-high-read)
 961     ((< score default-low)
 962      . gnus-summary-low-read)
 963     (t
 964      . gnus-summary-normal-read))
 965   "*Controls the highlighting of summary buffer lines.
 966
 967 A list of (FORM . FACE) pairs.  When deciding how a a particular
 968 summary line should be displayed, each form is evaluated.  The content
 969 of the face field after the first true form is used.  You can change
 970 how those summary lines are displayed, by editing the face field.
 971
 972 You can use the following variables in the FORM field.
 973
 974 score:        The article's score
 975 default:      The default article score.
 976 default-high: The default score for high scored articles.
 977 default-low:  The default score for low scored articles.
 978 below:        The score below which articles are automatically marked as read.
 979 mark:         The article's mark.
 980 uncached:     Non-nil if the article is uncached."
 981   :group 'gnus-summary-visual
 982   :type '(repeat (cons (sexp :tag "Form" nil)
 983                        face)))
 984
 985 (defcustom gnus-alter-header-function nil
 986   "Function called to allow alteration of article header structures.
 987 The function is called with one parameter, the article header vector,
 988 which it may alter in any way."
 989   :type '(choice (const :tag "None" nil)
 990                  function)
 991   :group 'gnus-summary)
 992
 993 (defvar gnus-decode-encoded-word-function 'mail-decode-encoded-word-string
 994   "Variable that says which function should be used to decode a string with encoded words.")
 995
 996 (defcustom gnus-extra-headers '(To Newsgroups)
 997   "*Extra headers to parse."
 998   :version "21.1"
 999   :group 'gnus-summary
1000   :type '(repeat symbol))
1001
1002 (defcustom gnus-ignored-from-addresses
1003   (and user-mail-address
1004        (not (string= user-mail-address ""))
1005        (regexp-quote user-mail-address))
1006   "*Regexp of From headers that may be suppressed in favor of To headers."
1007   :version "21.1"
1008   :group 'gnus-summary
1009   :type 'regexp)
1010
1011 (defcustom gnus-newsgroup-ignored-charsets '(unknown-8bit x-unknown)
1012   "List of charsets that should be ignored.
1013 When these charsets are used in the \"charset\" parameter, the
1014 default charset will be used instead."
1015   :version "21.1"
1016   :type '(repeat symbol)
1017   :group 'gnus-charset)
1018
1019 (gnus-define-group-parameter
1020  ignored-charsets
1021  :type list
1022  :function-document
1023  "Return the ignored charsets of GROUP."
1024  :variable gnus-group-ignored-charsets-alist
1025  :variable-default
1026  '(("alt\\.chinese\\.text" iso-8859-1))
1027  :variable-document
1028  "Alist of regexps (to match group names) and charsets that should be ignored.
1029 When these charsets are used in the \"charset\" parameter, the
1030 default charset will be used instead."
1031  :variable-group gnus-charset
1032  :variable-type '(repeat (cons (regexp :tag "Group")
1033                                (repeat symbol)))
1034  :parameter-type '(choice :tag "Ignored charsets"
1035                           :value nil
1036                           (repeat (symbol)))
1037  :parameter-document       "\
1038 List of charsets that should be ignored.
1039
1040 When these charsets are used in the \"charset\" parameter, the
1041 default charset will be used instead.")
1042
1043 (defcustom gnus-group-highlight-words-alist nil
1044   "Alist of group regexps and highlight regexps.
1045 This variable uses the same syntax as `gnus-emphasis-alist'."
1046   :version "21.1"
1047   :type '(repeat (cons (regexp :tag "Group")
1048                        (repeat (list (regexp :tag "Highlight regexp")
1049                                      (number :tag "Group for entire word" 0)
1050                                      (number :tag "Group for displayed part" 0)
1051                                      (symbol :tag "Face"
1052                                              gnus-emphasis-highlight-words)))))
1053   :group 'gnus-summary-visual)
1054
1055 (defcustom gnus-summary-show-article-charset-alist
1056   nil
1057   "Alist of number and charset.
1058 The article will be shown with the charset corresponding to the
1059 numbered argument.
1060 For example: ((1 . cn-gb-2312) (2 . big5))."
1061   :version "21.1"
1062   :type '(repeat (cons (number :tag "Argument" 1)
1063                        (symbol :tag "Charset")))
1064   :group 'gnus-charset)
1065
1066 (defcustom gnus-preserve-marks t
1067   "Whether marks are preserved when moving, copying and respooling messages."
1068   :version "21.1"
1069   :type 'boolean
1070   :group 'gnus-summary-marks)
1071
1072 (defcustom gnus-alter-articles-to-read-function nil
1073   "Function to be called to alter the list of articles to be selected."
1074   :type '(choice (const nil) function)
1075   :group 'gnus-summary)
1076
1077 (defcustom gnus-orphan-score nil
1078   "*All orphans get this score added.  Set in the score file."
1079   :group 'gnus-score-default
1080   :type '(choice (const nil)
1081                  integer))
1082
1083 (defcustom gnus-summary-save-parts-default-mime "image/.*"
1084   "*A regexp to match MIME parts when saving multiple parts of a
1085 message with `gnus-summary-save-parts' (\\<gnus-summary-mode-map>\\[gnus-summary-save-parts]).
1086 This regexp will be used by default when prompting the user for which
1087 type of files to save."
1088   :group 'gnus-summary
1089   :type 'regexp)
1090
1091 (defcustom gnus-read-all-available-headers nil
1092   "Whether Gnus should parse all headers made available to it.
1093 This is mostly relevant for slow back ends where the user may
1094 wish to widen the summary buffer to include all headers
1095 that were fetched.  Say, for nnultimate groups."
1096   :version "22.1"
1097   :group 'gnus-summary
1098   :type '(choice boolean regexp))
1099
1100 (defcustom gnus-summary-muttprint-program "muttprint"
1101   "Command (and optional arguments) used to run Muttprint."
1102   :version "22.1"
1103   :group 'gnus-summary
1104   :type 'string)
1105
1106 (defcustom gnus-article-loose-mime nil
1107   "If non-nil, don't require MIME-Version header.
1108 Some brain-damaged MUA/MTA, e.g. Lotus Domino 5.0.6 clients, does not
1109 supply the MIME-Version header or deliberately strip it from the mail.
1110 Set it to non-nil, Gnus will treat some articles as MIME even if
1111 the MIME-Version header is missed."
1112   :version "22.1"
1113   :type 'boolean
1114   :group 'gnus-article-mime)
1115
1116 (defcustom gnus-article-emulate-mime t
1117   "If non-nil, use MIME emulation for uuencode and the like.
1118 This means that Gnus will search message bodies for text that look
1119 like uuencoded bits, yEncoded bits, and so on, and present that using
1120 the normal Gnus MIME machinery."
1121   :version "22.1"
1122   :type 'boolean
1123   :group 'gnus-article-mime)
1124
1125 ;;; Internal variables
1126
1127 (defvar gnus-summary-display-cache nil)
1128 (defvar gnus-article-mime-handles nil)
1129 (defvar gnus-article-decoded-p nil)
1130 (defvar gnus-article-charset nil)
1131 (defvar gnus-article-ignored-charsets nil)
1132 (defvar gnus-scores-exclude-files nil)
1133 (defvar gnus-page-broken nil)
1134
1135 (defvar gnus-original-article nil)
1136 (defvar gnus-article-internal-prepare-hook nil)
1137 (defvar gnus-newsgroup-process-stack nil)
1138
1139 (defvar gnus-thread-indent-array nil)
1140 (defvar gnus-thread-indent-array-level gnus-thread-indent-level)
1141 (defvar gnus-sort-gathered-threads-function 'gnus-thread-sort-by-number
1142   "Function called to sort the articles within a thread after it has been gathered together.")
1143
1144 (defvar gnus-summary-save-parts-type-history nil)
1145 (defvar gnus-summary-save-parts-last-directory mm-default-directory)
1146
1147 ;; Avoid highlighting in kill files.
1148 (defvar gnus-summary-inhibit-highlight nil)
1149 (defvar gnus-newsgroup-selected-overlay nil)
1150 (defvar gnus-inhibit-limiting nil)
1151 (defvar gnus-newsgroup-adaptive-score-file nil)
1152 (defvar gnus-current-score-file nil)
1153 (defvar gnus-current-move-group nil)
1154 (defvar gnus-current-copy-group nil)
1155 (defvar gnus-current-crosspost-group nil)
1156 (defvar gnus-newsgroup-display nil)
1157
1158 (defvar gnus-newsgroup-dependencies nil)
1159 (defvar gnus-newsgroup-adaptive nil)
1160 (defvar gnus-summary-display-article-function nil)
1161 (defvar gnus-summary-highlight-line-function nil
1162   "Function called after highlighting a summary line.")
1163
1164 (defvar gnus-summary-line-format-alist
1165   `((?N ,(macroexpand '(mail-header-number gnus-tmp-header)) ?d)
1166     (?S ,(macroexpand '(mail-header-subject gnus-tmp-header)) ?s)
1167     (?s gnus-tmp-subject-or-nil ?s)
1168     (?n gnus-tmp-name ?s)
1169     (?A (car (cdr (funcall gnus-extract-address-components gnus-tmp-from)))
1170         ?s)
1171     (?a (or (car (funcall gnus-extract-address-components gnus-tmp-from))
1172             gnus-tmp-from) ?s)
1173     (?F gnus-tmp-from ?s)
1174     (?x ,(macroexpand '(mail-header-xref gnus-tmp-header)) ?s)
1175     (?D ,(macroexpand '(mail-header-date gnus-tmp-header)) ?s)
1176     (?d (gnus-dd-mmm (mail-header-date gnus-tmp-header)) ?s)
1177     (?o (gnus-date-iso8601 (mail-header-date gnus-tmp-header)) ?s)
1178     (?M ,(macroexpand '(mail-header-id gnus-tmp-header)) ?s)
1179     (?r ,(macroexpand '(mail-header-references gnus-tmp-header)) ?s)
1180     (?c (or (mail-header-chars gnus-tmp-header) 0) ?d)
1181     (?k (gnus-summary-line-message-size gnus-tmp-header) ?s)
1182     (?L gnus-tmp-lines ?s)
1183     (?O gnus-tmp-downloaded ?c)
1184     (?I gnus-tmp-indentation ?s)
1185     (?T (if (= gnus-tmp-level 0) "" (make-string (frame-width) ? )) ?s)
1186     (?R gnus-tmp-replied ?c)
1187     (?\[ gnus-tmp-opening-bracket ?c)
1188     (?\] gnus-tmp-closing-bracket ?c)
1189     (?\> (make-string gnus-tmp-level ? ) ?s)
1190     (?\< (make-string (max 0 (- 20 gnus-tmp-level)) ? ) ?s)
1191     (?i gnus-tmp-score ?d)
1192     (?z gnus-tmp-score-char ?c)
1193     (?l (bbb-grouplens-score gnus-tmp-header) ?s)
1194     (?V (gnus-thread-total-score (and (boundp 'thread) (car thread))) ?d)
1195     (?U gnus-tmp-unread ?c)
1196     (?f (gnus-summary-from-or-to-or-newsgroups gnus-tmp-header gnus-tmp-from)
1197         ?s)
1198     (?t (gnus-summary-number-of-articles-in-thread
1199          (and (boundp 'thread) (car thread)) gnus-tmp-level)
1200         ?d)
1201     (?e (gnus-summary-number-of-articles-in-thread
1202          (and (boundp 'thread) (car thread)) gnus-tmp-level t)
1203         ?c)
1204     (?u gnus-tmp-user-defined ?s)
1205     (?P (gnus-pick-line-number) ?d)
1206     (?B gnus-tmp-thread-tree-header-string ?s)
1207     (user-date (gnus-user-date
1208                 ,(macroexpand '(mail-header-date gnus-tmp-header))) ?s))
1209   "An alist of format specifications that can appear in summary lines.
1210 These are paired with what variables they correspond with, along with
1211 the type of the variable (string, integer, character, etc).")
1212
1213 (defvar gnus-summary-dummy-line-format-alist
1214   `((?S gnus-tmp-subject ?s)
1215     (?N gnus-tmp-number ?d)
1216     (?u gnus-tmp-user-defined ?s)))
1217
1218 (defvar gnus-summary-mode-line-format-alist
1219   `((?G gnus-tmp-group-name ?s)
1220     (?g (gnus-short-group-name gnus-tmp-group-name) ?s)
1221     (?p (gnus-group-real-name gnus-tmp-group-name) ?s)
1222     (?A gnus-tmp-article-number ?d)
1223     (?Z gnus-tmp-unread-and-unselected ?s)
1224     (?V gnus-version ?s)
1225     (?U gnus-tmp-unread-and-unticked ?d)
1226     (?S gnus-tmp-subject ?s)
1227     (?e gnus-tmp-unselected ?d)
1228     (?u gnus-tmp-user-defined ?s)
1229     (?d (length gnus-newsgroup-dormant) ?d)
1230     (?t (length gnus-newsgroup-marked) ?d)
1231     (?h (length gnus-newsgroup-spam-marked) ?d)
1232     (?r (length gnus-newsgroup-reads) ?d)
1233     (?z (gnus-summary-article-score gnus-tmp-article-number) ?d)
1234     (?E gnus-newsgroup-expunged-tally ?d)
1235     (?s (gnus-current-score-file-nondirectory) ?s)))
1236
1237 (defvar gnus-last-search-regexp nil
1238   "Default regexp for article search command.")
1239
1240 (defvar gnus-last-shell-command nil
1241   "Default shell command on article.")
1242
1243 (defvar gnus-newsgroup-agentized nil
1244   "Locally bound in each summary buffer to indicate whether the server has been agentized.")
1245 (defvar gnus-newsgroup-begin nil)
1246 (defvar gnus-newsgroup-end nil)
1247 (defvar gnus-newsgroup-last-rmail nil)
1248 (defvar gnus-newsgroup-last-mail nil)
1249 (defvar gnus-newsgroup-last-folder nil)
1250 (defvar gnus-newsgroup-last-file nil)
1251 (defvar gnus-newsgroup-auto-expire nil)
1252 (defvar gnus-newsgroup-active nil)
1253
1254 (defvar gnus-newsgroup-data nil)
1255 (defvar gnus-newsgroup-data-reverse nil)
1256 (defvar gnus-newsgroup-limit nil)
1257 (defvar gnus-newsgroup-limits nil)
1258 (defvar gnus-summary-use-undownloaded-faces nil)
1259
1260 (defvar gnus-newsgroup-unreads nil
1261   "Sorted list of unread articles in the current newsgroup.")
1262
1263 (defvar gnus-newsgroup-unselected nil
1264   "Sorted list of unselected unread articles in the current newsgroup.")
1265
1266 (defvar gnus-newsgroup-reads nil
1267   "Alist of read articles and article marks in the current newsgroup.")
1268
1269 (defvar gnus-newsgroup-expunged-tally nil)
1270
1271 (defvar gnus-newsgroup-marked nil
1272   "Sorted list of ticked articles in the current newsgroup (a subset of unread art).")
1273
1274 (defvar gnus-newsgroup-spam-marked nil
1275   "List of ranges of articles that have been marked as spam.")
1276
1277 (defvar gnus-newsgroup-killed nil
1278   "List of ranges of articles that have been through the scoring process.")
1279
1280 (defvar gnus-newsgroup-cached nil
1281   "Sorted list of articles that come from the article cache.")
1282
1283 (defvar gnus-newsgroup-saved nil
1284   "List of articles that have been saved.")
1285
1286 (defvar gnus-newsgroup-kill-headers nil)
1287
1288 (defvar gnus-newsgroup-replied nil
1289   "List of articles that have been replied to in the current newsgroup.")
1290
1291 (defvar gnus-newsgroup-forwarded nil
1292   "List of articles that have been forwarded in the current newsgroup.")
1293
1294 (defvar gnus-newsgroup-recent nil
1295   "List of articles that have are recent in the current newsgroup.")
1296
1297 (defvar gnus-newsgroup-expirable nil
1298   "Sorted list of articles in the current newsgroup that can be expired.")
1299
1300 (defvar gnus-newsgroup-processable nil
1301   "List of articles in the current newsgroup that can be processed.")
1302
1303 (defvar gnus-newsgroup-downloadable nil
1304   "Sorted list of articles in the current newsgroup that can be processed.")
1305
1306 (defvar gnus-newsgroup-unfetched nil
1307   "Sorted list of articles in the current newsgroup whose headers have
1308 not been fetched into the agent.
1309
1310 This list will always be a subset of gnus-newsgroup-undownloaded.")
1311
1312 (defvar gnus-newsgroup-undownloaded nil
1313   "List of articles in the current newsgroup that haven't been downloaded.")
1314
1315 (defvar gnus-newsgroup-unsendable nil
1316   "List of articles in the current newsgroup that won't be sent.")
1317
1318 (defvar gnus-newsgroup-bookmarks nil
1319   "List of articles in the current newsgroup that have bookmarks.")
1320
1321 (defvar gnus-newsgroup-dormant nil
1322   "Sorted list of dormant articles in the current newsgroup.")
1323
1324 (defvar gnus-newsgroup-unseen nil
1325   "List of unseen articles in the current newsgroup.")
1326
1327 (defvar gnus-newsgroup-seen nil
1328   "Range of seen articles in the current newsgroup.")
1329
1330 (defvar gnus-newsgroup-articles nil
1331   "List of articles in the current newsgroup.")
1332
1333 (defvar gnus-newsgroup-scored nil
1334   "List of scored articles in the current newsgroup.")
1335
1336 (defvar gnus-newsgroup-headers nil
1337   "List of article headers in the current newsgroup.")
1338
1339 (defvar gnus-newsgroup-threads nil)
1340
1341 (defvar gnus-newsgroup-prepared nil
1342   "Whether the current group has been prepared properly.")
1343
1344 (defvar gnus-newsgroup-ancient nil
1345   "List of `gnus-fetch-old-headers' articles in the current newsgroup.")
1346
1347 (defvar gnus-newsgroup-sparse nil)
1348
1349 (defvar gnus-current-article nil)
1350 (defvar gnus-article-current nil)
1351 (defvar gnus-current-headers nil)
1352 (defvar gnus-have-all-headers nil)
1353 (defvar gnus-last-article nil)
1354 (defvar gnus-newsgroup-history nil)
1355 (defvar gnus-newsgroup-charset nil)
1356 (defvar gnus-newsgroup-ephemeral-charset nil)
1357 (defvar gnus-newsgroup-ephemeral-ignored-charsets nil)
1358
1359 (defvar gnus-article-before-search nil)
1360
1361 (defvar gnus-summary-local-variables
1362   '(gnus-newsgroup-name
1363     gnus-newsgroup-begin gnus-newsgroup-end
1364     gnus-newsgroup-last-rmail gnus-newsgroup-last-mail
1365     gnus-newsgroup-last-folder gnus-newsgroup-last-file
1366     gnus-newsgroup-auto-expire gnus-newsgroup-unreads
1367     gnus-newsgroup-unselected gnus-newsgroup-marked
1368     gnus-newsgroup-spam-marked
1369     gnus-newsgroup-reads gnus-newsgroup-saved
1370     gnus-newsgroup-replied gnus-newsgroup-forwarded
1371     gnus-newsgroup-recent
1372     gnus-newsgroup-expirable
1373     gnus-newsgroup-processable gnus-newsgroup-killed
1374     gnus-newsgroup-downloadable gnus-newsgroup-undownloaded
1375     gnus-newsgroup-unfetched
1376     gnus-newsgroup-unsendable gnus-newsgroup-unseen
1377     gnus-newsgroup-seen gnus-newsgroup-articles
1378     gnus-newsgroup-bookmarks gnus-newsgroup-dormant
1379     gnus-newsgroup-headers gnus-newsgroup-threads
1380     gnus-newsgroup-prepared gnus-summary-highlight-line-function
1381     gnus-current-article gnus-current-headers gnus-have-all-headers
1382     gnus-last-article gnus-article-internal-prepare-hook
1383     gnus-newsgroup-dependencies gnus-newsgroup-selected-overlay
1384     gnus-newsgroup-scored gnus-newsgroup-kill-headers
1385     gnus-thread-expunge-below
1386     gnus-score-alist gnus-current-score-file
1387     (gnus-summary-expunge-below . global)
1388     (gnus-summary-mark-below . global)
1389     (gnus-orphan-score . global)
1390     gnus-newsgroup-active gnus-scores-exclude-files
1391     gnus-newsgroup-history gnus-newsgroup-ancient
1392     gnus-newsgroup-sparse gnus-newsgroup-process-stack
1393     (gnus-newsgroup-adaptive . gnus-use-adaptive-scoring)
1394     gnus-newsgroup-adaptive-score-file (gnus-reffed-article-number . -1)
1395     (gnus-newsgroup-expunged-tally . 0)
1396     gnus-cache-removable-articles gnus-newsgroup-cached
1397     gnus-newsgroup-data gnus-newsgroup-data-reverse
1398     gnus-newsgroup-limit gnus-newsgroup-limits
1399     gnus-newsgroup-charset gnus-newsgroup-display
1400     gnus-summary-use-undownloaded-faces)
1401   "Variables that are buffer-local to the summary buffers.")
1402
1403 (defvar gnus-newsgroup-variables nil
1404   "A list of variables that have separate values in different newsgroups.
1405 A list of newsgroup (summary buffer) local variables, or cons of
1406 variables and their default expressions to be evalled (when the default
1407 values are not nil), that should be made global while the summary buffer
1408 is active.
1409
1410 Note: The default expressions will be evaluated (using function `eval')
1411 before assignment to the local variable rather than just assigned to it.
1412 If the default expression is the symbol `global', that symbol will not
1413 be evaluated but the global value of the local variable will be used
1414 instead.
1415
1416 These variables can be used to set variables in the group parameters
1417 while still allowing them to affect operations done in other buffers.
1418 For example:
1419
1420 \(setq gnus-newsgroup-variables
1421      '(message-use-followup-to
1422        (gnus-visible-headers .
1423          \"^From:\\\\|^Newsgroups:\\\\|^Subject:\\\\|^Date:\\\\|^To:\")))
1424 ")
1425
1426 ;; Byte-compiler warning.
1427 (eval-when-compile
1428   ;; Bind features so that require will believe that gnus-sum has
1429   ;; already been loaded (avoids infinite recursion)
1430   (let ((features (cons 'gnus-sum features)))
1431     ;; Several of the declarations in gnus-sum are needed to load the
1432     ;; following files. Right now, these definitions have been
1433     ;; compiled but not defined (evaluated).  We could either do a
1434     ;; eval-and-compile about all of the declarations or evaluate the
1435     ;; source file.
1436     (if (boundp 'gnus-newsgroup-variables)
1437         nil
1438       (load "gnus-sum.el" t t t))
1439     (require 'gnus)
1440     (require 'gnus-agent)
1441     (require 'gnus-art)))
1442
1443 ;; MIME stuff.
1444
1445 (defvar gnus-decode-encoded-word-methods
1446   '(mail-decode-encoded-word-string)
1447   "List of methods used to decode encoded words.
1448
1449 This variable is a list of FUNCTION or (REGEXP . FUNCTION).  If item
1450 is FUNCTION, FUNCTION will be apply to all newsgroups.  If item is a
1451 \(REGEXP . FUNCTION), FUNCTION will be only apply to thes newsgroups
1452 whose names match REGEXP.
1453
1454 For example:
1455 \((\"chinese\" . gnus-decode-encoded-word-string-by-guess)
1456  mail-decode-encoded-word-string
1457  (\"chinese\" . rfc1843-decode-string))")
1458
1459 (defvar gnus-decode-encoded-word-methods-cache nil)
1460
1461 (defun gnus-multi-decode-encoded-word-string (string)
1462   "Apply the functions from `gnus-encoded-word-methods' that match."
1463   (unless (and gnus-decode-encoded-word-methods-cache
1464                (eq gnus-newsgroup-name
1465                    (car gnus-decode-encoded-word-methods-cache)))
1466     (setq gnus-decode-encoded-word-methods-cache (list gnus-newsgroup-name))
1467     (mapcar (lambda (x)
1468               (if (symbolp x)
1469                   (nconc gnus-decode-encoded-word-methods-cache (list x))
1470                 (if (and gnus-newsgroup-name
1471                          (string-match (car x) gnus-newsgroup-name))
1472                     (nconc gnus-decode-encoded-word-methods-cache
1473                            (list (cdr x))))))
1474             gnus-decode-encoded-word-methods))
1475   (let ((xlist gnus-decode-encoded-word-methods-cache))
1476     (pop xlist)
1477     (while xlist
1478       (setq string (funcall (pop xlist) string))))
1479   string)
1480
1481 ;; Subject simplification.
1482
1483 (defun gnus-simplify-whitespace (str)
1484   "Remove excessive whitespace from STR."
1485   ;; Multiple spaces.
1486   (while (string-match "[ \t][ \t]+" str)
1487     (setq str (concat (substring str 0 (match-beginning 0))
1488                         " "
1489                         (substring str (match-end 0)))))
1490   ;; Leading spaces.
1491   (when (string-match "^[ \t]+" str)
1492     (setq str (substring str (match-end 0))))
1493   ;; Trailing spaces.
1494   (when (string-match "[ \t]+$" str)
1495     (setq str (substring str 0 (match-beginning 0))))
1496   str)
1497
1498 (defun gnus-simplify-all-whitespace (str)
1499   "Remove all whitespace from STR."
1500   (while (string-match "[ \t\n]+" str)
1501     (setq str (replace-match "" nil nil str)))
1502   str)
1503
1504 (defsubst gnus-simplify-subject-re (subject)
1505   "Remove \"Re:\" from subject lines."
1506   (if (string-match message-subject-re-regexp subject)
1507       (substring subject (match-end 0))
1508     subject))
1509
1510 (defun gnus-simplify-subject (subject &optional re-only)
1511   "Remove `Re:' and words in parentheses.
1512 If RE-ONLY is non-nil, strip leading `Re:'s only."
1513   (let ((case-fold-search t))           ;Ignore case.
1514     ;; Remove `Re:', `Re^N:', `Re(n)', and `Re[n]:'.
1515     (when (string-match "\\`\\(re\\([[(^][0-9]+[])]?\\)?:[ \t]*\\)+" subject)
1516       (setq subject (substring subject (match-end 0))))
1517     ;; Remove uninteresting prefixes.
1518     (when (and (not re-only)
1519                gnus-simplify-ignored-prefixes
1520                (string-match gnus-simplify-ignored-prefixes subject))
1521       (setq subject (substring subject (match-end 0))))
1522     ;; Remove words in parentheses from end.
1523     (unless re-only
1524       (while (string-match "[ \t\n]*([^()]*)[ \t\n]*\\'" subject)
1525         (setq subject (substring subject 0 (match-beginning 0)))))
1526     ;; Return subject string.
1527     subject))
1528
1529 ;; Remove any leading "re:"s, any trailing paren phrases, and simplify
1530 ;; all whitespace.
1531 (defsubst gnus-simplify-buffer-fuzzy-step (regexp &optional newtext)
1532   (goto-char (point-min))
1533   (while (re-search-forward regexp nil t)
1534     (replace-match (or newtext ""))))
1535
1536 (defun gnus-simplify-buffer-fuzzy ()
1537   "Simplify string in the buffer fuzzily.
1538 The string in the accessible portion of the current buffer is simplified.
1539 It is assumed to be a single-line subject.
1540 Whitespace is generally cleaned up, and miscellaneous leading/trailing
1541 matter is removed.  Additional things can be deleted by setting
1542 `gnus-simplify-subject-fuzzy-regexp'."
1543   (let ((case-fold-search t)
1544         (modified-tick))
1545     (gnus-simplify-buffer-fuzzy-step "\t" " ")
1546
1547     (while (not (eq modified-tick (buffer-modified-tick)))
1548       (setq modified-tick (buffer-modified-tick))
1549       (cond
1550        ((listp gnus-simplify-subject-fuzzy-regexp)
1551         (mapcar 'gnus-simplify-buffer-fuzzy-step
1552                 gnus-simplify-subject-fuzzy-regexp))
1553        (gnus-simplify-subject-fuzzy-regexp
1554         (gnus-simplify-buffer-fuzzy-step gnus-simplify-subject-fuzzy-regexp)))
1555       (gnus-simplify-buffer-fuzzy-step "^ *\\[[-+?*!][-+?*!]\\] *")
1556       (gnus-simplify-buffer-fuzzy-step
1557        "^ *\\(re\\|fw\\|fwd\\)[[{(^0-9]*[])}]?[:;] *")
1558       (gnus-simplify-buffer-fuzzy-step "^[[].*:\\( .*\\)[]]$" "\\1"))
1559
1560     (gnus-simplify-buffer-fuzzy-step " *[[{(][^()\n]*[]})] *$")
1561     (gnus-simplify-buffer-fuzzy-step "  +" " ")
1562     (gnus-simplify-buffer-fuzzy-step " $")
1563     (gnus-simplify-buffer-fuzzy-step "^ +")))
1564
1565 (defun gnus-simplify-subject-fuzzy (subject)
1566   "Simplify a subject string fuzzily.
1567 See `gnus-simplify-buffer-fuzzy' for details."
1568   (save-excursion
1569     (gnus-set-work-buffer)
1570     (let ((case-fold-search t))
1571       ;; Remove uninteresting prefixes.
1572       (when (and gnus-simplify-ignored-prefixes
1573                  (string-match gnus-simplify-ignored-prefixes subject))
1574         (setq subject (substring subject (match-end 0))))
1575       (insert subject)
1576       (inline (gnus-simplify-buffer-fuzzy))
1577       (buffer-string))))
1578
1579 (defsubst gnus-simplify-subject-fully (subject)
1580   "Simplify a subject string according to `gnus-summary-gather-subject-limit'."
1581   (cond
1582    (gnus-simplify-subject-functions
1583     (gnus-map-function gnus-simplify-subject-functions subject))
1584    ((null gnus-summary-gather-subject-limit)
1585     (gnus-simplify-subject-re subject))
1586    ((eq gnus-summary-gather-subject-limit 'fuzzy)
1587     (gnus-simplify-subject-fuzzy subject))
1588    ((numberp gnus-summary-gather-subject-limit)
1589     (gnus-limit-string (gnus-simplify-subject-re subject)
1590                        gnus-summary-gather-subject-limit))
1591    (t
1592     subject)))
1593
1594 (defsubst gnus-subject-equal (s1 s2 &optional simple-first)
1595   "Check whether two subjects are equal.
1596 If optional argument SIMPLE-FIRST is t, first argument is already
1597 simplified."
1598   (cond
1599    ((null simple-first)
1600     (equal (gnus-simplify-subject-fully s1)
1601            (gnus-simplify-subject-fully s2)))
1602    (t
1603     (equal s1
1604            (gnus-simplify-subject-fully s2)))))
1605
1606 (defun gnus-summary-bubble-group ()
1607   "Increase the score of the current group.
1608 This is a handy function to add to `gnus-summary-exit-hook' to
1609 increase the score of each group you read."
1610   (gnus-group-add-score gnus-newsgroup-name))
1611
1612 \f
1613 ;;;
1614 ;;; Gnus summary mode
1615 ;;;
1616
1617 (put 'gnus-summary-mode 'mode-class 'special)
1618
1619 (defvar gnus-article-commands-menu)
1620
1621 ;; Non-orthogonal keys
1622
1623 (gnus-define-keys gnus-summary-mode-map
1624   " " gnus-summary-next-page
1625   "\177" gnus-summary-prev-page
1626   [delete] gnus-summary-prev-page
1627   [backspace] gnus-summary-prev-page
1628   "\r" gnus-summary-scroll-up
1629   "\M-\r" gnus-summary-scroll-down
1630   "n" gnus-summary-next-unread-article
1631   "p" gnus-summary-prev-unread-article
1632   "N" gnus-summary-next-article
1633   "P" gnus-summary-prev-article
1634   "\M-\C-n" gnus-summary-next-same-subject
1635   "\M-\C-p" gnus-summary-prev-same-subject
1636   "\M-n" gnus-summary-next-unread-subject
1637   "\M-p" gnus-summary-prev-unread-subject
1638   "." gnus-summary-first-unread-article
1639   "," gnus-summary-best-unread-article
1640   "\M-s" gnus-summary-search-article-forward
1641   "\M-r" gnus-summary-search-article-backward
1642   "<" gnus-summary-beginning-of-article
1643   ">" gnus-summary-end-of-article
1644   "j" gnus-summary-goto-article
1645   "^" gnus-summary-refer-parent-article
1646   "\M-^" gnus-summary-refer-article
1647   "u" gnus-summary-tick-article-forward
1648   "!" gnus-summary-tick-article-forward
1649   "U" gnus-summary-tick-article-backward
1650   "d" gnus-summary-mark-as-read-forward
1651   "D" gnus-summary-mark-as-read-backward
1652   "E" gnus-summary-mark-as-expirable
1653   "\M-u" gnus-summary-clear-mark-forward
1654   "\M-U" gnus-summary-clear-mark-backward
1655   "k" gnus-summary-kill-same-subject-and-select
1656   "\C-k" gnus-summary-kill-same-subject
1657   "\M-\C-k" gnus-summary-kill-thread
1658   "\M-\C-l" gnus-summary-lower-thread
1659   "e" gnus-summary-edit-article
1660   "#" gnus-summary-mark-as-processable
1661   "\M-#" gnus-summary-unmark-as-processable
1662   "\M-\C-t" gnus-summary-toggle-threads
1663   "\M-\C-s" gnus-summary-show-thread
1664   "\M-\C-h" gnus-summary-hide-thread
1665   "\M-\C-f" gnus-summary-next-thread
1666   "\M-\C-b" gnus-summary-prev-thread
1667   [(meta down)] gnus-summary-next-thread
1668   [(meta up)] gnus-summary-prev-thread
1669   "\M-\C-u" gnus-summary-up-thread
1670   "\M-\C-d" gnus-summary-down-thread
1671   "&" gnus-summary-execute-command
1672   "c" gnus-summary-catchup-and-exit
1673   "\C-w" gnus-summary-mark-region-as-read
1674   "\C-t" gnus-summary-toggle-truncation
1675   "?" gnus-summary-mark-as-dormant
1676   "\C-c\M-\C-s" gnus-summary-limit-include-expunged
1677   "\C-c\C-s\C-n" gnus-summary-sort-by-number
1678   "\C-c\C-s\C-l" gnus-summary-sort-by-lines
1679   "\C-c\C-s\C-c" gnus-summary-sort-by-chars
1680   "\C-c\C-s\C-a" gnus-summary-sort-by-author
1681   "\C-c\C-s\C-s" gnus-summary-sort-by-subject
1682   "\C-c\C-s\C-d" gnus-summary-sort-by-date
1683   "\C-c\C-s\C-i" gnus-summary-sort-by-score
1684   "\C-c\C-s\C-o" gnus-summary-sort-by-original
1685   "\C-c\C-s\C-r" gnus-summary-sort-by-random
1686   "=" gnus-summary-expand-window
1687   "\C-x\C-s" gnus-summary-reselect-current-group
1688   "\M-g" gnus-summary-rescan-group
1689   "w" gnus-summary-stop-page-breaking
1690   "\C-c\C-r" gnus-summary-caesar-message
1691   "f" gnus-summary-followup
1692   "F" gnus-summary-followup-with-original
1693   "C" gnus-summary-cancel-article
1694   "r" gnus-summary-reply
1695   "R" gnus-summary-reply-with-original
1696   "\C-c\C-f" gnus-summary-mail-forward
1697   "o" gnus-summary-save-article
1698   "\C-o" gnus-summary-save-article-mail
1699   "|" gnus-summary-pipe-output
1700   "\M-k" gnus-summary-edit-local-kill
1701   "\M-K" gnus-summary-edit-global-kill
1702   ;; "V" gnus-version
1703   "\C-c\C-d" gnus-summary-describe-group
1704   "q" gnus-summary-exit
1705   "Q" gnus-summary-exit-no-update
1706   "\C-c\C-i" gnus-info-find-node
1707   gnus-mouse-2 gnus-mouse-pick-article
1708   [follow-link] mouse-face
1709   "m" gnus-summary-mail-other-window
1710   "a" gnus-summary-post-news
1711   "i" gnus-summary-news-other-window
1712   "x" gnus-summary-limit-to-unread
1713   "s" gnus-summary-isearch-article
1714   "t" gnus-summary-toggle-header
1715   "g" gnus-summary-show-article
1716   "l" gnus-summary-goto-last-article
1717   "\C-c\C-v\C-v" gnus-uu-decode-uu-view
1718   "\C-d" gnus-summary-enter-digest-group
1719   "\M-\C-d" gnus-summary-read-document
1720   "\M-\C-e" gnus-summary-edit-parameters
1721   "\M-\C-a" gnus-summary-customize-parameters
1722   "\C-c\C-b" gnus-bug
1723   "*" gnus-cache-enter-article
1724   "\M-*" gnus-cache-remove-article
1725   "\M-&" gnus-summary-universal-argument
1726   "\C-l" gnus-recenter
1727   "I" gnus-summary-increase-score
1728   "L" gnus-summary-lower-score
1729   "\M-i" gnus-symbolic-argument
1730   "h" gnus-summary-select-article-buffer
1731
1732   "b" gnus-article-view-part
1733   "\M-t" gnus-summary-toggle-display-buttonized
1734
1735   "V" gnus-summary-score-map
1736   "X" gnus-uu-extract-map
1737   "S" gnus-summary-send-map)
1738
1739 ;; Sort of orthogonal keymap
1740 (gnus-define-keys (gnus-summary-mark-map "M" gnus-summary-mode-map)
1741   "t" gnus-summary-tick-article-forward
1742   "!" gnus-summary-tick-article-forward
1743   "d" gnus-summary-mark-as-read-forward
1744   "r" gnus-summary-mark-as-read-forward
1745   "c" gnus-summary-clear-mark-forward
1746   " " gnus-summary-clear-mark-forward
1747   "e" gnus-summary-mark-as-expirable
1748   "x" gnus-summary-mark-as-expirable
1749   "?" gnus-summary-mark-as-dormant
1750   "b" gnus-summary-set-bookmark
1751   "B" gnus-summary-remove-bookmark
1752   "#" gnus-summary-mark-as-processable
1753   "\M-#" gnus-summary-unmark-as-processable
1754   "S" gnus-summary-limit-include-expunged
1755   "C" gnus-summary-catchup
1756   "H" gnus-summary-catchup-to-here
1757   "h" gnus-summary-catchup-from-here
1758   "\C-c" gnus-summary-catchup-all
1759   "k" gnus-summary-kill-same-subject-and-select
1760   "K" gnus-summary-kill-same-subject
1761   "P" gnus-uu-mark-map)
1762
1763 (gnus-define-keys (gnus-summary-mscore-map "V" gnus-summary-mark-map)
1764   "c" gnus-summary-clear-above
1765   "u" gnus-summary-tick-above
1766   "m" gnus-summary-mark-above
1767   "k" gnus-summary-kill-below)
1768
1769 (gnus-define-keys (gnus-summary-limit-map "/" gnus-summary-mode-map)
1770   "/" gnus-summary-limit-to-subject
1771   "n" gnus-summary-limit-to-articles
1772   "w" gnus-summary-pop-limit
1773   "s" gnus-summary-limit-to-subject
1774   "a" gnus-summary-limit-to-author
1775   "u" gnus-summary-limit-to-unread
1776   "m" gnus-summary-limit-to-marks
1777   "M" gnus-summary-limit-exclude-marks
1778   "v" gnus-summary-limit-to-score
1779   "*" gnus-summary-limit-include-cached
1780   "D" gnus-summary-limit-include-dormant
1781   "T" gnus-summary-limit-include-thread
1782   "d" gnus-summary-limit-exclude-dormant
1783   "t" gnus-summary-limit-to-age
1784   "." gnus-summary-limit-to-unseen
1785   "x" gnus-summary-limit-to-extra
1786   "p" gnus-summary-limit-to-display-predicate
1787   "E" gnus-summary-limit-include-expunged
1788   "c" gnus-summary-limit-exclude-childless-dormant
1789   "C" gnus-summary-limit-mark-excluded-as-read
1790   "o" gnus-summary-insert-old-articles
1791   "N" gnus-summary-insert-new-articles)
1792
1793 (gnus-define-keys (gnus-summary-goto-map "G" gnus-summary-mode-map)
1794   "n" gnus-summary-next-unread-article
1795   "p" gnus-summary-prev-unread-article
1796   "N" gnus-summary-next-article
1797   "P" gnus-summary-prev-article
1798   "\C-n" gnus-summary-next-same-subject
1799   "\C-p" gnus-summary-prev-same-subject
1800   "\M-n" gnus-summary-next-unread-subject
1801   "\M-p" gnus-summary-prev-unread-subject
1802   "f" gnus-summary-first-unread-article
1803   "b" gnus-summary-best-unread-article
1804   "j" gnus-summary-goto-article
1805   "g" gnus-summary-goto-subject
1806   "l" gnus-summary-goto-last-article
1807   "o" gnus-summary-pop-article)
1808
1809 (gnus-define-keys (gnus-summary-thread-map "T" gnus-summary-mode-map)
1810   "k" gnus-summary-kill-thread
1811   "l" gnus-summary-lower-thread
1812   "i" gnus-summary-raise-thread
1813   "T" gnus-summary-toggle-threads
1814   "t" gnus-summary-rethread-current
1815   "^" gnus-summary-reparent-thread
1816   "s" gnus-summary-show-thread
1817   "S" gnus-summary-show-all-threads
1818   "h" gnus-summary-hide-thread
1819   "H" gnus-summary-hide-all-threads
1820   "n" gnus-summary-next-thread
1821   "p" gnus-summary-prev-thread
1822   "u" gnus-summary-up-thread
1823   "o" gnus-summary-top-thread
1824   "d" gnus-summary-down-thread
1825   "#" gnus-uu-mark-thread
1826   "\M-#" gnus-uu-unmark-thread)
1827
1828 (gnus-define-keys (gnus-summary-buffer-map "Y" gnus-summary-mode-map)
1829   "g" gnus-summary-prepare
1830   "c" gnus-summary-insert-cached-articles
1831   "d" gnus-summary-insert-dormant-articles)
1832
1833 (gnus-define-keys (gnus-summary-exit-map "Z" gnus-summary-mode-map)
1834   "c" gnus-summary-catchup-and-exit
1835   "C" gnus-summary-catchup-all-and-exit
1836   "E" gnus-summary-exit-no-update
1837   "Q" gnus-summary-exit
1838   "Z" gnus-summary-exit
1839   "n" gnus-summary-catchup-and-goto-next-group
1840   "R" gnus-summary-reselect-current-group
1841   "G" gnus-summary-rescan-group
1842   "N" gnus-summary-next-group
1843   "s" gnus-summary-save-newsrc
1844   "P" gnus-summary-prev-group)
1845
1846 (gnus-define-keys (gnus-summary-article-map "A" gnus-summary-mode-map)
1847   " " gnus-summary-next-page
1848   "n" gnus-summary-next-page
1849   "\177" gnus-summary-prev-page
1850   [delete] gnus-summary-prev-page
1851   "p" gnus-summary-prev-page
1852   "\r" gnus-summary-scroll-up
1853   "\M-\r" gnus-summary-scroll-down
1854   "<" gnus-summary-beginning-of-article
1855   ">" gnus-summary-end-of-article
1856   "b" gnus-summary-beginning-of-article
1857   "e" gnus-summary-end-of-article
1858   "^" gnus-summary-refer-parent-article
1859   "r" gnus-summary-refer-parent-article
1860   "D" gnus-summary-enter-digest-group
1861   "R" gnus-summary-refer-references
1862   "T" gnus-summary-refer-thread
1863   "g" gnus-summary-show-article
1864   "s" gnus-summary-isearch-article
1865   "P" gnus-summary-print-article
1866   "M" gnus-mailing-list-insinuate
1867   "t" gnus-article-babel)
1868
1869 (gnus-define-keys (gnus-summary-wash-map "W" gnus-summary-mode-map)
1870   "b" gnus-article-add-buttons
1871   "B" gnus-article-add-buttons-to-head
1872   "o" gnus-article-treat-overstrike
1873   "e" gnus-article-emphasize
1874   "w" gnus-article-fill-cited-article
1875   "Q" gnus-article-fill-long-lines
1876   "C" gnus-article-capitalize-sentences
1877   "c" gnus-article-remove-cr
1878   "q" gnus-article-de-quoted-unreadable
1879   "6" gnus-article-de-base64-unreadable
1880   "Z" gnus-article-decode-HZ
1881   "h" gnus-article-wash-html
1882   "u" gnus-article-unsplit-urls
1883   "s" gnus-summary-force-verify-and-decrypt
1884   "f" gnus-article-display-x-face
1885   "l" gnus-summary-stop-page-breaking
1886   "r" gnus-summary-caesar-message
1887   "m" gnus-summary-morse-message
1888   "t" gnus-summary-toggle-header
1889   "g" gnus-treat-smiley
1890   "v" gnus-summary-verbose-headers
1891   "a" gnus-article-strip-headers-in-body ;; mnemonic: wash archive
1892   "p" gnus-article-verify-x-pgp-sig
1893   "d" gnus-article-treat-dumbquotes)
1894
1895 (gnus-define-keys (gnus-summary-wash-deuglify-map "Y" gnus-summary-wash-map)
1896   ;; mnemonic: deuglif*Y*
1897   "u" gnus-article-outlook-unwrap-lines
1898   "a" gnus-article-outlook-repair-attribution
1899   "c" gnus-article-outlook-rearrange-citation
1900   "f" gnus-article-outlook-deuglify-article) ;; mnemonic: full deuglify
1901
1902 (gnus-define-keys (gnus-summary-wash-hide-map "W" gnus-summary-wash-map)
1903   "a" gnus-article-hide
1904   "h" gnus-article-hide-headers
1905   "b" gnus-article-hide-boring-headers
1906   "s" gnus-article-hide-signature
1907   "c" gnus-article-hide-citation
1908   "C" gnus-article-hide-citation-in-followups
1909   "l" gnus-article-hide-list-identifiers
1910   "B" gnus-article-strip-banner
1911   "P" gnus-article-hide-pem
1912   "\C-c" gnus-article-hide-citation-maybe)
1913
1914 (gnus-define-keys (gnus-summary-wash-highlight-map "H" gnus-summary-wash-map)
1915   "a" gnus-article-highlight
1916   "h" gnus-article-highlight-headers
1917   "c" gnus-article-highlight-citation
1918   "s" gnus-article-highlight-signature)
1919
1920 (gnus-define-keys (gnus-summary-wash-header-map "G" gnus-summary-wash-map)
1921   "f" gnus-article-treat-fold-headers
1922   "u" gnus-article-treat-unfold-headers
1923   "n" gnus-article-treat-fold-newsgroups)
1924
1925 (gnus-define-keys (gnus-summary-wash-display-map "D" gnus-summary-wash-map)
1926   "x" gnus-article-display-x-face
1927   "d" gnus-article-display-face
1928   "s" gnus-treat-smiley
1929   "D" gnus-article-remove-images
1930   "f" gnus-treat-from-picon
1931   "m" gnus-treat-mail-picon
1932   "n" gnus-treat-newsgroups-picon)
1933
1934 (gnus-define-keys (gnus-summary-wash-mime-map "M" gnus-summary-wash-map)
1935   "w" gnus-article-decode-mime-words
1936   "c" gnus-article-decode-charset
1937   "v" gnus-mime-view-all-parts
1938   "b" gnus-article-view-part)
1939
1940 (gnus-define-keys (gnus-summary-wash-time-map "T" gnus-summary-wash-map)
1941   "z" gnus-article-date-ut
1942   "u" gnus-article-date-ut
1943   "l" gnus-article-date-local
1944   "p" gnus-article-date-english
1945   "e" gnus-article-date-lapsed
1946   "o" gnus-article-date-original
1947   "i" gnus-article-date-iso8601
1948   "s" gnus-article-date-user)
1949
1950 (gnus-define-keys (gnus-summary-wash-empty-map "E" gnus-summary-wash-map)
1951   "t" gnus-article-remove-trailing-blank-lines
1952   "l" gnus-article-strip-leading-blank-lines
1953   "m" gnus-article-strip-multiple-blank-lines
1954   "a" gnus-article-strip-blank-lines
1955   "A" gnus-article-strip-all-blank-lines
1956   "s" gnus-article-strip-leading-space
1957   "e" gnus-article-strip-trailing-space
1958   "w" gnus-article-remove-leading-whitespace)
1959
1960 (gnus-define-keys (gnus-summary-help-map "H" gnus-summary-mode-map)
1961   "v" gnus-version
1962   "f" gnus-summary-fetch-faq
1963   "d" gnus-summary-describe-group
1964   "h" gnus-summary-describe-briefly
1965   "i" gnus-info-find-node
1966   "c" gnus-group-fetch-charter
1967   "C" gnus-group-fetch-control)
1968
1969 (gnus-define-keys (gnus-summary-backend-map "B" gnus-summary-mode-map)
1970   "e" gnus-summary-expire-articles
1971   "\M-\C-e" gnus-summary-expire-articles-now
1972   "\177" gnus-summary-delete-article
1973   [delete] gnus-summary-delete-article
1974   [backspace] gnus-summary-delete-article
1975   "m" gnus-summary-move-article
1976   "r" gnus-summary-respool-article
1977   "w" gnus-summary-edit-article
1978   "c" gnus-summary-copy-article
1979   "B" gnus-summary-crosspost-article
1980   "q" gnus-summary-respool-query
1981   "t" gnus-summary-respool-trace
1982   "i" gnus-summary-import-article
1983   "I" gnus-summary-create-article
1984   "p" gnus-summary-article-posted-p)
1985
1986 (gnus-define-keys (gnus-summary-save-map "O" gnus-summary-mode-map)
1987   "o" gnus-summary-save-article
1988   "m" gnus-summary-save-article-mail
1989   "F" gnus-summary-write-article-file
1990   "r" gnus-summary-save-article-rmail
1991   "f" gnus-summary-save-article-file
1992   "b" gnus-summary-save-article-body-file
1993   "h" gnus-summary-save-article-folder
1994   "v" gnus-summary-save-article-vm
1995   "p" gnus-summary-pipe-output
1996   "P" gnus-summary-muttprint
1997   "s" gnus-soup-add-article)
1998
1999 (gnus-define-keys (gnus-summary-mime-map "K" gnus-summary-mode-map)
2000   "b" gnus-summary-display-buttonized
2001   "m" gnus-summary-repair-multipart
2002   "v" gnus-article-view-part
2003   "o" gnus-article-save-part
2004   "c" gnus-article-copy-part
2005   "C" gnus-article-view-part-as-charset
2006   "e" gnus-article-view-part-externally
2007   "E" gnus-article-encrypt-body
2008   "i" gnus-article-inline-part
2009   "|" gnus-article-pipe-part)
2010
2011 (gnus-define-keys (gnus-uu-mark-map "P" gnus-summary-mark-map)
2012   "p" gnus-summary-mark-as-processable
2013   "u" gnus-summary-unmark-as-processable
2014   "U" gnus-summary-unmark-all-processable
2015   "v" gnus-uu-mark-over
2016   "s" gnus-uu-mark-series
2017   "r" gnus-uu-mark-region
2018   "g" gnus-uu-unmark-region
2019   "R" gnus-uu-mark-by-regexp
2020   "G" gnus-uu-unmark-by-regexp
2021   "t" gnus-uu-mark-thread
2022   "T" gnus-uu-unmark-thread
2023   "a" gnus-uu-mark-all
2024   "b" gnus-uu-mark-buffer
2025   "S" gnus-uu-mark-sparse
2026   "k" gnus-summary-kill-process-mark
2027   "y" gnus-summary-yank-process-mark
2028   "w" gnus-summary-save-process-mark
2029   "i" gnus-uu-invert-processable)
2030
2031 (gnus-define-keys (gnus-uu-extract-map "X" gnus-summary-mode-map)
2032   ;;"x" gnus-uu-extract-any
2033   "m" gnus-summary-save-parts
2034   "u" gnus-uu-decode-uu
2035   "U" gnus-uu-decode-uu-and-save
2036   "s" gnus-uu-decode-unshar
2037   "S" gnus-uu-decode-unshar-and-save
2038   "o" gnus-uu-decode-save
2039   "O" gnus-uu-decode-save
2040   "b" gnus-uu-decode-binhex
2041   "B" gnus-uu-decode-binhex
2042   "p" gnus-uu-decode-postscript
2043   "P" gnus-uu-decode-postscript-and-save)
2044
2045 (gnus-define-keys
2046     (gnus-uu-extract-view-map "v" gnus-uu-extract-map)
2047   "u" gnus-uu-decode-uu-view
2048   "U" gnus-uu-decode-uu-and-save-view
2049   "s" gnus-uu-decode-unshar-view
2050   "S" gnus-uu-decode-unshar-and-save-view
2051   "o" gnus-uu-decode-save-view
2052   "O" gnus-uu-decode-save-view
2053   "b" gnus-uu-decode-binhex-view
2054   "B" gnus-uu-decode-binhex-view
2055   "p" gnus-uu-decode-postscript-view
2056   "P" gnus-uu-decode-postscript-and-save-view)
2057
2058 (defvar gnus-article-post-menu nil)
2059
2060 (defconst gnus-summary-menu-maxlen 20)
2061
2062 (defun gnus-summary-menu-split (menu)
2063   ;; If we have lots of elements, divide them into groups of 20
2064   ;; and make a pane (or submenu) for each one.
2065   (if (> (length menu) (/ (* gnus-summary-menu-maxlen 3) 2))
2066       (let ((menu menu) sublists next
2067             (i 1))
2068         (while menu
2069           ;; Pull off the next gnus-summary-menu-maxlen elements
2070           ;; and make them the next element of sublist.
2071           (setq next (nthcdr gnus-summary-menu-maxlen menu))
2072           (if next
2073               (setcdr (nthcdr (1- gnus-summary-menu-maxlen) menu)
2074                       nil))
2075           (setq sublists (cons (cons (format "%s ... %s" (aref (car menu) 0)
2076                                              (aref (car (last menu)) 0)) menu)
2077                                sublists))
2078           (setq i (1+ i))
2079           (setq menu next))
2080         (nreverse sublists))
2081     ;; Few elements--put them all in one pane.
2082     menu))
2083
2084 (defun gnus-summary-make-menu-bar ()
2085   (gnus-turn-off-edit-menu 'summary)
2086
2087   (unless (boundp 'gnus-summary-misc-menu)
2088
2089     (easy-menu-define
2090       gnus-summary-kill-menu gnus-summary-mode-map ""
2091       (cons
2092        "Score"
2093        (nconc
2094         (list
2095          ["Customize" gnus-score-customize t])
2096         (gnus-make-score-map 'increase)
2097         (gnus-make-score-map 'lower)
2098         '(("Mark"
2099            ["Kill below" gnus-summary-kill-below t]
2100            ["Mark above" gnus-summary-mark-above t]
2101            ["Tick above" gnus-summary-tick-above t]
2102            ["Clear above" gnus-summary-clear-above t])
2103           ["Current score" gnus-summary-current-score t]
2104           ["Set score" gnus-summary-set-score t]
2105           ["Switch current score file..." gnus-score-change-score-file t]
2106           ["Set mark below..." gnus-score-set-mark-below t]
2107           ["Set expunge below..." gnus-score-set-expunge-below t]
2108           ["Edit current score file" gnus-score-edit-current-scores t]
2109           ["Edit score file" gnus-score-edit-file t]
2110           ["Trace score" gnus-score-find-trace t]
2111           ["Find words" gnus-score-find-favourite-words t]
2112           ["Rescore buffer" gnus-summary-rescore t]
2113           ["Increase score..." gnus-summary-increase-score t]
2114           ["Lower score..." gnus-summary-lower-score t]))))
2115
2116     ;; Define both the Article menu in the summary buffer and the
2117     ;; equivalent Commands menu in the article buffer here for
2118     ;; consistency.
2119     (let ((innards
2120            `(("Hide"
2121               ["All" gnus-article-hide t]
2122               ["Headers" gnus-article-hide-headers t]
2123               ["Signature" gnus-article-hide-signature t]
2124               ["Citation" gnus-article-hide-citation t]
2125               ["List identifiers" gnus-article-hide-list-identifiers t]
2126               ["Banner" gnus-article-strip-banner t]
2127               ["Boring headers" gnus-article-hide-boring-headers t])
2128              ("Highlight"
2129               ["All" gnus-article-highlight t]
2130               ["Headers" gnus-article-highlight-headers t]
2131               ["Signature" gnus-article-highlight-signature t]
2132               ["Citation" gnus-article-highlight-citation t])
2133              ("MIME"
2134               ["Words" gnus-article-decode-mime-words t]
2135               ["Charset" gnus-article-decode-charset t]
2136               ["QP" gnus-article-de-quoted-unreadable t]
2137               ["Base64" gnus-article-de-base64-unreadable t]
2138               ["View MIME buttons" gnus-summary-display-buttonized t]
2139               ["View all" gnus-mime-view-all-parts t]
2140               ["Verify and Decrypt" gnus-summary-force-verify-and-decrypt t]
2141               ["Encrypt body" gnus-article-encrypt-body
2142                :active (not (gnus-group-read-only-p))
2143                ,@(if (featurep 'xemacs) nil
2144                    '(:help "Encrypt the message body on disk"))]
2145               ["Extract all parts..." gnus-summary-save-parts t]
2146               ("Multipart"
2147                ["Repair multipart" gnus-summary-repair-multipart t]
2148                ["Pipe part..." gnus-article-pipe-part t]
2149                ["Inline part" gnus-article-inline-part t]
2150                ["Encrypt body" gnus-article-encrypt-body
2151                 :active (not (gnus-group-read-only-p))
2152                ,@(if (featurep 'xemacs) nil
2153                    '(:help "Encrypt the message body on disk"))]
2154                ["View part externally" gnus-article-view-part-externally t]
2155                ["View part with charset..." gnus-article-view-part-as-charset t]
2156                ["Copy part" gnus-article-copy-part t]
2157                ["Save part..." gnus-article-save-part t]
2158                ["View part" gnus-article-view-part t]))
2159              ("Date"
2160               ["Local" gnus-article-date-local t]
2161               ["ISO8601" gnus-article-date-iso8601 t]
2162               ["UT" gnus-article-date-ut t]
2163               ["Original" gnus-article-date-original t]
2164               ["Lapsed" gnus-article-date-lapsed t]
2165               ["User-defined" gnus-article-date-user t])
2166              ("Display"
2167               ["Remove images" gnus-article-remove-images t]
2168               ["Toggle smiley" gnus-treat-smiley t]
2169               ["Show X-Face" gnus-article-display-x-face t]
2170               ["Show picons in From" gnus-treat-from-picon t]
2171               ["Show picons in mail headers" gnus-treat-mail-picon t]
2172               ["Show picons in news headers" gnus-treat-newsgroups-picon t]
2173               ("View as different encoding"
2174                ,@(gnus-summary-menu-split
2175                   (mapcar
2176                    (lambda (cs)
2177                      ;; Since easymenu under Emacs doesn't allow
2178                      ;; lambda forms for menu commands, we should
2179                      ;; provide intern'ed function symbols.
2180                      (let ((command (intern (format "\
2181 gnus-summary-show-article-from-menu-as-charset-%s" cs))))
2182                        (fset command
2183                              `(lambda ()
2184                                 (interactive)
2185                                 (let ((gnus-summary-show-article-charset-alist
2186                                        '((1 . ,cs))))
2187                                   (gnus-summary-show-article 1))))
2188                        `[,(symbol-name cs) ,command t]))
2189                    (sort (if (fboundp 'coding-system-list)
2190                              (coding-system-list)
2191                            (mapcar 'car mm-mime-mule-charset-alist))
2192                          'string<)))))
2193              ("Washing"
2194               ("Remove Blanks"
2195                ["Leading" gnus-article-strip-leading-blank-lines t]
2196                ["Multiple" gnus-article-strip-multiple-blank-lines t]
2197                ["Trailing" gnus-article-remove-trailing-blank-lines t]
2198                ["All of the above" gnus-article-strip-blank-lines t]
2199                ["All" gnus-article-strip-all-blank-lines t]
2200                ["Leading space" gnus-article-strip-leading-space t]
2201                ["Trailing space" gnus-article-strip-trailing-space t]
2202                ["Leading space in headers"
2203                 gnus-article-remove-leading-whitespace t])
2204               ["Overstrike" gnus-article-treat-overstrike t]
2205               ["Dumb quotes" gnus-article-treat-dumbquotes t]
2206               ["Emphasis" gnus-article-emphasize t]
2207               ["Word wrap" gnus-article-fill-cited-article t]
2208               ["Fill long lines" gnus-article-fill-long-lines t]
2209               ["Capitalize sentences" gnus-article-capitalize-sentences t]
2210               ["Remove CR" gnus-article-remove-cr t]
2211               ["Quoted-Printable" gnus-article-de-quoted-unreadable t]
2212               ["Base64" gnus-article-de-base64-unreadable t]
2213               ["Rot 13" gnus-summary-caesar-message
2214                ,@(if (featurep 'xemacs) '(t)
2215                    '(:help "\"Caesar rotate\" article by 13"))]
2216               ["Morse decode" gnus-summary-morse-message t]
2217               ["Unix pipe..." gnus-summary-pipe-message t]
2218               ["Add buttons" gnus-article-add-buttons t]
2219               ["Add buttons to head" gnus-article-add-buttons-to-head t]
2220               ["Stop page breaking" gnus-summary-stop-page-breaking t]
2221               ["Verbose header" gnus-summary-verbose-headers t]
2222               ["Toggle header" gnus-summary-toggle-header t]
2223               ["Unfold headers" gnus-article-treat-unfold-headers t]
2224               ["Fold newsgroups" gnus-article-treat-fold-newsgroups t]
2225               ["Html" gnus-article-wash-html t]
2226               ["Unsplit URLs" gnus-article-unsplit-urls t]
2227               ["Verify X-PGP-Sig" gnus-article-verify-x-pgp-sig t]
2228               ["Decode HZ" gnus-article-decode-HZ t]
2229               ("(Outlook) Deuglify"
2230                ["Unwrap lines" gnus-article-outlook-unwrap-lines t]
2231                ["Repair attribution" gnus-article-outlook-repair-attribution t]
2232                ["Rearrange citation" gnus-article-outlook-rearrange-citation t]
2233                ["Full (Outlook) deuglify"
2234                 gnus-article-outlook-deuglify-article t])
2235               )
2236              ("Output"
2237               ["Save in default format..." gnus-summary-save-article
2238                ,@(if (featurep 'xemacs) '(t)
2239                    '(:help "Save article using default method"))]
2240               ["Save in file..." gnus-summary-save-article-file
2241                ,@(if (featurep 'xemacs) '(t)
2242                    '(:help "Save article in file"))]
2243               ["Save in Unix mail format..." gnus-summary-save-article-mail t]
2244               ["Save in MH folder..." gnus-summary-save-article-folder t]
2245               ["Save in VM folder..." gnus-summary-save-article-vm t]
2246               ["Save in RMAIL mbox..." gnus-summary-save-article-rmail t]
2247               ["Save body in file..." gnus-summary-save-article-body-file t]
2248               ["Pipe through a filter..." gnus-summary-pipe-output t]
2249               ["Add to SOUP packet" gnus-soup-add-article t]
2250               ["Print with Muttprint..." gnus-summary-muttprint t]
2251               ["Print" gnus-summary-print-article
2252                ,@(if (featurep 'xemacs) '(t)
2253                    '(:help "Generate and print a PostScript image"))])
2254              ("Copy, move,... (Backend)"
2255               ,@(if (featurep 'xemacs) nil
2256                   '(:help "Copying, moving, expiring articles..."))
2257               ["Respool article..." gnus-summary-respool-article t]
2258               ["Move article..." gnus-summary-move-article
2259                (gnus-check-backend-function
2260                 'request-move-article gnus-newsgroup-name)]
2261               ["Copy article..." gnus-summary-copy-article t]
2262               ["Crosspost article..." gnus-summary-crosspost-article
2263                (gnus-check-backend-function
2264                 'request-replace-article gnus-newsgroup-name)]
2265               ["Import file..." gnus-summary-import-article
2266                (gnus-check-backend-function
2267                 'request-accept-article gnus-newsgroup-name)]
2268               ["Create article..." gnus-summary-create-article
2269                (gnus-check-backend-function
2270                 'request-accept-article gnus-newsgroup-name)]
2271               ["Check if posted" gnus-summary-article-posted-p t]
2272               ["Edit article" gnus-summary-edit-article
2273                (not (gnus-group-read-only-p))]
2274               ["Delete article" gnus-summary-delete-article
2275                (gnus-check-backend-function
2276                 'request-expire-articles gnus-newsgroup-name)]
2277               ["Query respool" gnus-summary-respool-query t]
2278               ["Trace respool" gnus-summary-respool-trace t]
2279               ["Delete expirable articles" gnus-summary-expire-articles-now
2280                (gnus-check-backend-function
2281                 'request-expire-articles gnus-newsgroup-name)])
2282              ("Extract"
2283               ["Uudecode" gnus-uu-decode-uu
2284                ,@(if (featurep 'xemacs) '(t)
2285                    '(:help "Decode uuencoded article(s)"))]
2286               ["Uudecode and save" gnus-uu-decode-uu-and-save t]
2287               ["Unshar" gnus-uu-decode-unshar t]
2288               ["Unshar and save" gnus-uu-decode-unshar-and-save t]
2289               ["Save" gnus-uu-decode-save t]
2290               ["Binhex" gnus-uu-decode-binhex t]
2291               ["Postscript" gnus-uu-decode-postscript t]
2292               ["All MIME parts" gnus-summary-save-parts t])
2293              ("Cache"
2294               ["Enter article" gnus-cache-enter-article t]
2295               ["Remove article" gnus-cache-remove-article t])
2296              ["Translate" gnus-article-babel t]
2297              ["Select article buffer" gnus-summary-select-article-buffer t]
2298              ["Enter digest buffer" gnus-summary-enter-digest-group t]
2299              ["Isearch article..." gnus-summary-isearch-article t]
2300              ["Beginning of the article" gnus-summary-beginning-of-article t]
2301              ["End of the article" gnus-summary-end-of-article t]
2302              ["Fetch parent of article" gnus-summary-refer-parent-article t]
2303              ["Fetch referenced articles" gnus-summary-refer-references t]
2304              ["Fetch current thread" gnus-summary-refer-thread t]
2305              ["Fetch article with id..." gnus-summary-refer-article t]
2306              ["Setup Mailing List Params" gnus-mailing-list-insinuate t]
2307              ["Redisplay" gnus-summary-show-article t]
2308              ["Raw article" gnus-summary-show-raw-article :keys "C-u g"])))
2309       (easy-menu-define
2310         gnus-summary-article-menu gnus-summary-mode-map ""
2311         (cons "Article" innards))
2312
2313       (if (not (keymapp gnus-summary-article-menu))
2314           (easy-menu-define
2315             gnus-article-commands-menu gnus-article-mode-map ""
2316             (cons "Commands" innards))
2317         ;; in Emacs, don't share menu.
2318         (setq gnus-article-commands-menu
2319               (copy-keymap gnus-summary-article-menu))
2320         (define-key gnus-article-mode-map [menu-bar commands]
2321           (cons "Commands" gnus-article-commands-menu))))
2322
2323     (easy-menu-define
2324       gnus-summary-thread-menu gnus-summary-mode-map ""
2325       '("Threads"
2326         ["Find all messages in thread" gnus-summary-refer-thread t]
2327         ["Toggle threading" gnus-summary-toggle-threads t]
2328         ["Hide threads" gnus-summary-hide-all-threads t]
2329         ["Show threads" gnus-summary-show-all-threads t]
2330         ["Hide thread" gnus-summary-hide-thread t]
2331         ["Show thread" gnus-summary-show-thread t]
2332         ["Go to next thread" gnus-summary-next-thread t]
2333         ["Go to previous thread" gnus-summary-prev-thread t]
2334         ["Go down thread" gnus-summary-down-thread t]
2335         ["Go up thread" gnus-summary-up-thread t]
2336         ["Top of thread" gnus-summary-top-thread t]
2337         ["Mark thread as read" gnus-summary-kill-thread t]
2338         ["Lower thread score" gnus-summary-lower-thread t]
2339         ["Raise thread score" gnus-summary-raise-thread t]
2340         ["Rethread current" gnus-summary-rethread-current t]))
2341
2342     (easy-menu-define
2343       gnus-summary-post-menu gnus-summary-mode-map ""
2344       `("Post"
2345         ["Send a message (mail or news)" gnus-summary-post-news
2346          ,@(if (featurep 'xemacs) '(t)
2347              '(:help "Compose a new message (mail or news)"))]
2348         ["Followup" gnus-summary-followup
2349          ,@(if (featurep 'xemacs) '(t)
2350              '(:help "Post followup to this article"))]
2351         ["Followup and yank" gnus-summary-followup-with-original
2352          ,@(if (featurep 'xemacs) '(t)
2353              '(:help "Post followup to this article, quoting its contents"))]
2354         ["Supersede article" gnus-summary-supersede-article t]
2355         ["Cancel article" gnus-summary-cancel-article
2356          ,@(if (featurep 'xemacs) '(t)
2357              '(:help "Cancel an article you posted"))]
2358         ["Reply" gnus-summary-reply t]
2359         ["Reply and yank" gnus-summary-reply-with-original t]
2360         ["Wide reply" gnus-summary-wide-reply t]
2361         ["Wide reply and yank" gnus-summary-wide-reply-with-original
2362          ,@(if (featurep 'xemacs) '(t)
2363              '(:help "Mail a reply, quoting this article"))]
2364         ["Very wide reply" gnus-summary-very-wide-reply t]
2365         ["Very wide reply and yank" gnus-summary-very-wide-reply-with-original
2366          ,@(if (featurep 'xemacs) '(t)
2367              '(:help "Mail a very wide reply, quoting this article"))]
2368         ["Mail forward" gnus-summary-mail-forward t]
2369         ["Post forward" gnus-summary-post-forward t]
2370         ["Digest and mail" gnus-uu-digest-mail-forward t]
2371         ["Digest and post" gnus-uu-digest-post-forward t]
2372         ["Resend message" gnus-summary-resend-message t]
2373         ["Resend message edit" gnus-summary-resend-message-edit t]
2374         ["Send bounced mail" gnus-summary-resend-bounced-mail t]
2375         ["Send a mail" gnus-summary-mail-other-window t]
2376         ["Create a local message" gnus-summary-news-other-window t]
2377         ["Uuencode and post" gnus-uu-post-news
2378          ,@(if (featurep 'xemacs) '(t)
2379              '(:help "Post a uuencoded article"))]
2380         ["Followup via news" gnus-summary-followup-to-mail t]
2381         ["Followup via news and yank"
2382          gnus-summary-followup-to-mail-with-original t]
2383         ;;("Draft"
2384         ;;["Send" gnus-summary-send-draft t]
2385         ;;["Send bounced" gnus-resend-bounced-mail t])
2386         ))
2387
2388     (cond
2389      ((not (keymapp gnus-summary-post-menu))
2390       (setq gnus-article-post-menu gnus-summary-post-menu))
2391      ((not gnus-article-post-menu)
2392       ;; Don't share post menu.
2393       (setq gnus-article-post-menu
2394             (copy-keymap gnus-summary-post-menu))))
2395     (define-key gnus-article-mode-map [menu-bar post]
2396       (cons "Post" gnus-article-post-menu))
2397
2398     (easy-menu-define
2399       gnus-summary-misc-menu gnus-summary-mode-map ""
2400       `("Gnus"
2401         ("Mark Read"
2402          ["Mark as read" gnus-summary-mark-as-read-forward t]
2403          ["Mark same subject and select"
2404           gnus-summary-kill-same-subject-and-select t]
2405          ["Mark same subject" gnus-summary-kill-same-subject t]
2406          ["Catchup" gnus-summary-catchup
2407           ,@(if (featurep 'xemacs) '(t)
2408               '(:help "Mark unread articles in this group as read"))]
2409          ["Catchup all" gnus-summary-catchup-all t]
2410          ["Catchup to here" gnus-summary-catchup-to-here t]
2411          ["Catchup from here" gnus-summary-catchup-from-here t]
2412          ["Catchup region" gnus-summary-mark-region-as-read
2413           (gnus-mark-active-p)]
2414          ["Mark excluded" gnus-summary-limit-mark-excluded-as-read t])
2415         ("Mark Various"
2416          ["Tick" gnus-summary-tick-article-forward t]
2417          ["Mark as dormant" gnus-summary-mark-as-dormant t]
2418          ["Remove marks" gnus-summary-clear-mark-forward t]
2419          ["Set expirable mark" gnus-summary-mark-as-expirable t]
2420          ["Set bookmark" gnus-summary-set-bookmark t]
2421          ["Remove bookmark" gnus-summary-remove-bookmark t])
2422         ("Limit to"
2423          ["Marks..." gnus-summary-limit-to-marks t]
2424          ["Subject..." gnus-summary-limit-to-subject t]
2425          ["Author..." gnus-summary-limit-to-author t]
2426          ["Age..." gnus-summary-limit-to-age t]
2427          ["Extra..." gnus-summary-limit-to-extra t]
2428          ["Score..." gnus-summary-limit-to-score t]
2429          ["Display Predicate" gnus-summary-limit-to-display-predicate t]
2430          ["Unread" gnus-summary-limit-to-unread t]
2431          ["Unseen" gnus-summary-limit-to-unseen t]
2432          ["Non-dormant" gnus-summary-limit-exclude-dormant t]
2433          ["Next articles" gnus-summary-limit-to-articles t]
2434          ["Pop limit" gnus-summary-pop-limit t]
2435          ["Show dormant" gnus-summary-limit-include-dormant t]
2436          ["Hide childless dormant"
2437           gnus-summary-limit-exclude-childless-dormant t]
2438          ;;["Hide thread" gnus-summary-limit-exclude-thread t]
2439          ["Hide marked" gnus-summary-limit-exclude-marks t]
2440          ["Show expunged" gnus-summary-limit-include-expunged t])
2441         ("Process Mark"
2442          ["Set mark" gnus-summary-mark-as-processable t]
2443          ["Remove mark" gnus-summary-unmark-as-processable t]
2444          ["Remove all marks" gnus-summary-unmark-all-processable t]
2445          ["Mark above" gnus-uu-mark-over t]
2446          ["Mark series" gnus-uu-mark-series t]
2447          ["Mark region" gnus-uu-mark-region (gnus-mark-active-p)]
2448          ["Unmark region" gnus-uu-unmark-region (gnus-mark-active-p)]
2449          ["Mark by regexp..." gnus-uu-mark-by-regexp t]
2450          ["Unmark by regexp..." gnus-uu-unmark-by-regexp t]
2451          ["Mark all" gnus-uu-mark-all t]
2452          ["Mark buffer" gnus-uu-mark-buffer t]
2453          ["Mark sparse" gnus-uu-mark-sparse t]
2454          ["Mark thread" gnus-uu-mark-thread t]
2455          ["Unmark thread" gnus-uu-unmark-thread t]
2456          ("Process Mark Sets"
2457           ["Kill" gnus-summary-kill-process-mark t]
2458           ["Yank" gnus-summary-yank-process-mark
2459            gnus-newsgroup-process-stack]
2460           ["Save" gnus-summary-save-process-mark t]
2461           ["Run command on marked..." gnus-summary-universal-argument t]))
2462         ("Scroll article"
2463          ["Page forward" gnus-summary-next-page
2464           ,@(if (featurep 'xemacs) '(t)
2465               '(:help "Show next page of article"))]
2466          ["Page backward" gnus-summary-prev-page
2467           ,@(if (featurep 'xemacs) '(t)
2468               '(:help "Show previous page of article"))]
2469          ["Line forward" gnus-summary-scroll-up t])
2470         ("Move"
2471          ["Next unread article" gnus-summary-next-unread-article t]
2472          ["Previous unread article" gnus-summary-prev-unread-article t]
2473          ["Next article" gnus-summary-next-article t]
2474          ["Previous article" gnus-summary-prev-article t]
2475          ["Next unread subject" gnus-summary-next-unread-subject t]
2476          ["Previous unread subject" gnus-summary-prev-unread-subject t]
2477          ["Next article same subject" gnus-summary-next-same-subject t]
2478          ["Previous article same subject" gnus-summary-prev-same-subject t]
2479          ["First unread article" gnus-summary-first-unread-article t]
2480          ["Best unread article" gnus-summary-best-unread-article t]
2481          ["Go to subject number..." gnus-summary-goto-subject t]
2482          ["Go to article number..." gnus-summary-goto-article t]
2483          ["Go to the last article" gnus-summary-goto-last-article t]
2484          ["Pop article off history" gnus-summary-pop-article t])
2485         ("Sort"
2486          ["Sort by number" gnus-summary-sort-by-number t]
2487          ["Sort by author" gnus-summary-sort-by-author t]
2488          ["Sort by subject" gnus-summary-sort-by-subject t]
2489          ["Sort by date" gnus-summary-sort-by-date t]
2490          ["Sort by score" gnus-summary-sort-by-score t]
2491          ["Sort by lines" gnus-summary-sort-by-lines t]
2492          ["Sort by characters" gnus-summary-sort-by-chars t]
2493          ["Randomize" gnus-summary-sort-by-random t]
2494          ["Original sort" gnus-summary-sort-by-original t])
2495         ("Help"
2496          ["Fetch group FAQ" gnus-summary-fetch-faq t]
2497          ["Describe group" gnus-summary-describe-group t]
2498          ["Fetch charter" gnus-group-fetch-charter
2499           ,@(if (featurep 'xemacs) nil
2500               '(:help "Display the charter of the current group"))]
2501          ["Fetch control message" gnus-group-fetch-control
2502           ,@(if (featurep 'xemacs) nil
2503               '(:help "Display the archived control message for the current group"))]
2504          ["Read manual" gnus-info-find-node t])
2505         ("Modes"
2506          ["Pick and read" gnus-pick-mode t]
2507          ["Binary" gnus-binary-mode t])
2508         ("Regeneration"
2509          ["Regenerate" gnus-summary-prepare t]
2510          ["Insert cached articles" gnus-summary-insert-cached-articles t]
2511          ["Insert dormant articles" gnus-summary-insert-dormant-articles t]
2512          ["Toggle threading" gnus-summary-toggle-threads t])
2513         ["See old articles" gnus-summary-insert-old-articles t]
2514         ["See new articles" gnus-summary-insert-new-articles t]
2515         ["Filter articles..." gnus-summary-execute-command t]
2516         ["Run command on articles..." gnus-summary-universal-argument t]
2517         ["Search articles forward..." gnus-summary-search-article-forward t]
2518         ["Search articles backward..." gnus-summary-search-article-backward t]
2519         ["Toggle line truncation" gnus-summary-toggle-truncation t]
2520         ["Expand window" gnus-summary-expand-window t]
2521         ["Expire expirable articles" gnus-summary-expire-articles
2522          (gnus-check-backend-function
2523           'request-expire-articles gnus-newsgroup-name)]
2524         ["Edit local kill file" gnus-summary-edit-local-kill t]
2525         ["Edit main kill file" gnus-summary-edit-global-kill t]
2526         ["Edit group parameters" gnus-summary-edit-parameters t]
2527         ["Customize group parameters" gnus-summary-customize-parameters t]
2528         ["Send a bug report" gnus-bug t]
2529         ("Exit"
2530          ["Catchup and exit" gnus-summary-catchup-and-exit
2531           ,@(if (featurep 'xemacs) '(t)
2532               '(:help "Mark unread articles in this group as read, then exit"))]
2533          ["Catchup all and exit" gnus-summary-catchup-all-and-exit t]
2534          ["Catchup and goto next" gnus-summary-catchup-and-goto-next-group t]
2535          ["Exit group" gnus-summary-exit
2536           ,@(if (featurep 'xemacs) '(t)
2537               '(:help "Exit current group, return to group selection mode"))]
2538          ["Exit group without updating" gnus-summary-exit-no-update t]
2539          ["Exit and goto next group" gnus-summary-next-group t]
2540          ["Exit and goto prev group" gnus-summary-prev-group t]
2541          ["Reselect group" gnus-summary-reselect-current-group t]
2542          ["Rescan group" gnus-summary-rescan-group t]
2543          ["Update dribble" gnus-summary-save-newsrc t])))
2544
2545     (gnus-run-hooks 'gnus-summary-menu-hook)))
2546
2547 (defvar gnus-summary-tool-bar-map nil)
2548
2549 ;; Emacs 21 tool bar.  Should be no-op otherwise.
2550 (defun gnus-summary-make-tool-bar ()
2551   (if (and (fboundp 'tool-bar-add-item-from-menu)
2552            (default-value 'tool-bar-mode)
2553            (not gnus-summary-tool-bar-map))
2554       (setq gnus-summary-tool-bar-map
2555             (let ((tool-bar-map (make-sparse-keymap))
2556                   (load-path (mm-image-load-path)))
2557               (tool-bar-add-item-from-menu
2558                'gnus-summary-prev-unread "prev-ur" gnus-summary-mode-map)
2559               (tool-bar-add-item-from-menu
2560                'gnus-summary-next-unread "next-ur" gnus-summary-mode-map)
2561               (tool-bar-add-item-from-menu
2562                'gnus-summary-post-news "post" gnus-summary-mode-map)
2563               (tool-bar-add-item-from-menu
2564                'gnus-summary-followup-with-original "fuwo" gnus-summary-mode-map)
2565               (tool-bar-add-item-from-menu
2566                'gnus-summary-followup "followup" gnus-summary-mode-map)
2567               (tool-bar-add-item-from-menu
2568                'gnus-summary-reply-with-original "reply-wo" gnus-summary-mode-map)
2569               (tool-bar-add-item-from-menu
2570                'gnus-summary-reply "reply" gnus-summary-mode-map)
2571               (tool-bar-add-item-from-menu
2572                'gnus-summary-caesar-message "rot13" gnus-summary-mode-map)
2573               (tool-bar-add-item-from-menu
2574                'gnus-uu-decode-uu "uu-decode" gnus-summary-mode-map)
2575               (tool-bar-add-item-from-menu
2576                'gnus-summary-save-article-file "save-aif" gnus-summary-mode-map)
2577               (tool-bar-add-item-from-menu
2578                'gnus-summary-save-article "save-art" gnus-summary-mode-map)
2579               (tool-bar-add-item-from-menu
2580                'gnus-uu-post-news "uu-post" gnus-summary-mode-map)
2581               (tool-bar-add-item-from-menu
2582                'gnus-summary-catchup "catchup" gnus-summary-mode-map)
2583               (tool-bar-add-item-from-menu
2584                'gnus-summary-catchup-and-exit "cu-exit" gnus-summary-mode-map)
2585               (tool-bar-add-item-from-menu
2586                'gnus-summary-exit "exit-summ" gnus-summary-mode-map)
2587               tool-bar-map)))
2588   (if gnus-summary-tool-bar-map
2589       (set (make-local-variable 'tool-bar-map) gnus-summary-tool-bar-map)))
2590
2591 (defun gnus-score-set-default (var value)
2592   "A version of set that updates the GNU Emacs menu-bar."
2593   (set var value)
2594   ;; It is the message that forces the active status to be updated.
2595   (message ""))
2596
2597 (defun gnus-make-score-map (type)
2598   "Make a summary score map of type TYPE."
2599   (if t
2600       nil
2601     (let ((headers '(("author" "from" string)
2602                      ("subject" "subject" string)
2603                      ("article body" "body" string)
2604                      ("article head" "head" string)
2605                      ("xref" "xref" string)
2606                      ("extra header" "extra" string)
2607                      ("lines" "lines" number)
2608                      ("followups to author" "followup" string)))
2609           (types '((number ("less than" <)
2610                            ("greater than" >)
2611                            ("equal" =))
2612                    (string ("substring" s)
2613                            ("exact string" e)
2614                            ("fuzzy string" f)
2615                            ("regexp" r))))
2616           (perms '(("temporary" (current-time-string))
2617                    ("permanent" nil)
2618                    ("immediate" now)))
2619           header)
2620       (list
2621        (apply
2622         'nconc
2623         (list
2624          (if (eq type 'lower)
2625              "Lower score"
2626            "Increase score"))
2627         (let (outh)
2628           (while headers
2629             (setq header (car headers))
2630             (setq outh
2631                   (cons
2632                    (apply
2633                     'nconc
2634                     (list (car header))
2635                     (let ((ts (cdr (assoc (nth 2 header) types)))
2636                           outt)
2637                       (while ts
2638                         (setq outt
2639                               (cons
2640                                (apply
2641                                 'nconc
2642                                 (list (caar ts))
2643                                 (let ((ps perms)
2644                                       outp)
2645                                   (while ps
2646                                     (setq outp
2647                                           (cons
2648                                            (vector
2649                                             (caar ps)
2650                                             (list
2651                                              'gnus-summary-score-entry
2652                                              (nth 1 header)
2653                                              (if (or (string= (nth 1 header)
2654                                                               "head")
2655                                                      (string= (nth 1 header)
2656                                                               "body"))
2657                                                  ""
2658                                                (list 'gnus-summary-header
2659                                                      (nth 1 header)))
2660                                              (list 'quote (nth 1 (car ts)))
2661                                              (list 'gnus-score-delta-default
2662                                                    nil)
2663                                              (nth 1 (car ps))
2664                                              t)
2665                                             t)
2666                                            outp))
2667                                     (setq ps (cdr ps)))
2668                                   (list (nreverse outp))))
2669                                outt))
2670                         (setq ts (cdr ts)))
2671                       (list (nreverse outt))))
2672                    outh))
2673             (setq headers (cdr headers)))
2674           (list (nreverse outh))))))))
2675
2676 \f
2677
2678 (defun gnus-summary-mode (&optional group)
2679   "Major mode for reading articles.
2680
2681 All normal editing commands are switched off.
2682 \\<gnus-summary-mode-map>
2683 Each line in this buffer represents one article.  To read an
2684 article, you can, for instance, type `\\[gnus-summary-next-page]'.  To move forwards
2685 and backwards while displaying articles, type `\\[gnus-summary-next-unread-article]' and `\\[gnus-summary-prev-unread-article]',
2686 respectively.
2687
2688 You can also post articles and send mail from this buffer.  To
2689 follow up an article, type `\\[gnus-summary-followup]'.  To mail a reply to the author
2690 of an article, type `\\[gnus-summary-reply]'.
2691
2692 There are approx. one gazillion commands you can execute in this
2693 buffer; read the info pages for more information (`\\[gnus-info-find-node]').
2694
2695 The following commands are available:
2696
2697 \\{gnus-summary-mode-map}"
2698   (interactive)
2699   (kill-all-local-variables)
2700   (when (gnus-visual-p 'summary-menu 'menu)
2701     (gnus-summary-make-menu-bar)
2702     (gnus-summary-make-tool-bar))
2703   (gnus-summary-make-local-variables)
2704   (let ((gnus-summary-local-variables gnus-newsgroup-variables))
2705     (gnus-summary-make-local-variables))
2706   (gnus-make-thread-indent-array)
2707   (gnus-simplify-mode-line)
2708   (setq major-mode 'gnus-summary-mode)
2709   (setq mode-name "Summary")
2710   (make-local-variable 'minor-mode-alist)
2711   (use-local-map gnus-summary-mode-map)
2712   (buffer-disable-undo)
2713   (setq buffer-read-only t)             ;Disable modification
2714   (setq truncate-lines t)
2715   (setq selective-display t)
2716   (setq selective-display-ellipses t)   ;Display `...'
2717   (gnus-summary-set-display-table)
2718   (gnus-set-default-directory)
2719   (setq gnus-newsgroup-name group)
2720   (make-local-variable 'gnus-summary-line-format)
2721   (make-local-variable 'gnus-summary-line-format-spec)
2722   (make-local-variable 'gnus-summary-dummy-line-format)
2723   (make-local-variable 'gnus-summary-dummy-line-format-spec)
2724   (make-local-variable 'gnus-summary-mark-positions)
2725   (gnus-make-local-hook 'pre-command-hook)
2726   (add-hook 'pre-command-hook 'gnus-set-global-variables nil t)
2727   (gnus-run-mode-hooks 'gnus-summary-mode-hook)
2728   (turn-on-gnus-mailing-list-mode)
2729   (mm-enable-multibyte)
2730   (gnus-update-format-specifications nil 'summary 'summary-mode 'summary-dummy)
2731   (gnus-update-summary-mark-positions))
2732
2733 (defun gnus-summary-make-local-variables ()
2734   "Make all the local summary buffer variables."
2735   (let (global)
2736     (dolist (local gnus-summary-local-variables)
2737       (if (consp local)
2738           (progn
2739             (if (eq (cdr local) 'global)
2740                 ;; Copy the global value of the variable.
2741                 (setq global (symbol-value (car local)))
2742               ;; Use the value from the list.
2743               (setq global (eval (cdr local))))
2744             (set (make-local-variable (car local)) global))
2745         ;; Simple nil-valued local variable.
2746         (set (make-local-variable local) nil)))))
2747
2748 (defun gnus-summary-clear-local-variables ()
2749   (let ((locals gnus-summary-local-variables))
2750     (while locals
2751       (if (consp (car locals))
2752           (and (vectorp (caar locals))
2753                (set (caar locals) nil))
2754         (and (vectorp (car locals))
2755              (set (car locals) nil)))
2756       (setq locals (cdr locals)))))
2757
2758 ;; Summary data functions.
2759
2760 (defmacro gnus-data-number (data)
2761   `(car ,data))
2762
2763 (defmacro gnus-data-set-number (data number)
2764   `(setcar ,data ,number))
2765
2766 (defmacro gnus-data-mark (data)
2767   `(nth 1 ,data))
2768
2769 (defmacro gnus-data-set-mark (data mark)
2770   `(setcar (nthcdr 1 ,data) ,mark))
2771
2772 (defmacro gnus-data-pos (data)
2773   `(nth 2 ,data))
2774
2775 (defmacro gnus-data-set-pos (data pos)
2776   `(setcar (nthcdr 2 ,data) ,pos))
2777
2778 (defmacro gnus-data-header (data)
2779   `(nth 3 ,data))
2780
2781 (defmacro gnus-data-set-header (data header)
2782   `(setf (nth 3 ,data) ,header))
2783
2784 (defmacro gnus-data-level (data)
2785   `(nth 4 ,data))
2786
2787 (defmacro gnus-data-unread-p (data)
2788   `(= (nth 1 ,data) gnus-unread-mark))
2789
2790 (defmacro gnus-data-read-p (data)
2791   `(/= (nth 1 ,data) gnus-unread-mark))
2792
2793 (defmacro gnus-data-pseudo-p (data)
2794   `(consp (nth 3 ,data)))
2795
2796 (defmacro gnus-data-find (number)
2797   `(assq ,number gnus-newsgroup-data))
2798
2799 (defmacro gnus-data-find-list (number &optional data)
2800   `(let ((bdata ,(or data 'gnus-newsgroup-data)))
2801      (memq (assq ,number bdata)
2802            bdata)))
2803
2804 (defmacro gnus-data-make (number mark pos header level)
2805   `(list ,number ,mark ,pos ,header ,level))
2806
2807 (defun gnus-data-enter (after-article number mark pos header level offset)
2808   (let ((data (gnus-data-find-list after-article)))
2809     (unless data
2810       (error "No such article: %d" after-article))
2811     (setcdr data (cons (gnus-data-make number mark pos header level)
2812                        (cdr data)))
2813     (setq gnus-newsgroup-data-reverse nil)
2814     (gnus-data-update-list (cddr data) offset)))
2815
2816 (defun gnus-data-enter-list (after-article list &optional offset)
2817   (when list
2818     (let ((data (and after-article (gnus-data-find-list after-article)))
2819           (ilist list))
2820       (if (not (or data
2821                    after-article))
2822           (let ((odata gnus-newsgroup-data))
2823             (setq gnus-newsgroup-data (nconc list gnus-newsgroup-data))
2824             (when offset
2825               (gnus-data-update-list odata offset)))
2826       ;; Find the last element in the list to be spliced into the main
2827         ;; list.
2828         (while (cdr list)
2829           (setq list (cdr list)))
2830         (if (not data)
2831             (progn
2832               (setcdr list gnus-newsgroup-data)
2833               (setq gnus-newsgroup-data ilist)
2834               (when offset
2835                 (gnus-data-update-list (cdr list) offset)))
2836           (setcdr list (cdr data))
2837           (setcdr data ilist)
2838           (when offset
2839             (gnus-data-update-list (cdr list) offset))))
2840       (setq gnus-newsgroup-data-reverse nil))))
2841
2842 (defun gnus-data-remove (article &optional offset)
2843   (let ((data gnus-newsgroup-data))
2844     (if (= (gnus-data-number (car data)) article)
2845         (progn
2846           (setq gnus-newsgroup-data (cdr gnus-newsgroup-data)
2847                 gnus-newsgroup-data-reverse nil)
2848           (when offset
2849             (gnus-data-update-list gnus-newsgroup-data offset)))
2850       (while (cdr data)
2851         (when (= (gnus-data-number (cadr data)) article)
2852           (setcdr data (cddr data))
2853           (when offset
2854             (gnus-data-update-list (cdr data) offset))
2855           (setq data nil
2856                 gnus-newsgroup-data-reverse nil))
2857         (setq data (cdr data))))))
2858
2859 (defmacro gnus-data-list (backward)
2860   `(if ,backward
2861        (or gnus-newsgroup-data-reverse
2862            (setq gnus-newsgroup-data-reverse
2863                  (reverse gnus-newsgroup-data)))
2864      gnus-newsgroup-data))
2865
2866 (defun gnus-data-update-list (data offset)
2867   "Add OFFSET to the POS of all data entries in DATA."
2868   (setq gnus-newsgroup-data-reverse nil)
2869   (while data
2870     (setcar (nthcdr 2 (car data)) (+ offset (nth 2 (car data))))
2871     (setq data (cdr data))))
2872
2873 (defun gnus-summary-article-pseudo-p (article)
2874   "Say whether this article is a pseudo article or not."
2875   (not (vectorp (gnus-data-header (gnus-data-find article)))))
2876
2877 (defmacro gnus-summary-article-sparse-p (article)
2878   "Say whether this article is a sparse article or not."
2879   `(memq ,article gnus-newsgroup-sparse))
2880
2881 (defmacro gnus-summary-article-ancient-p (article)
2882   "Say whether this article is a sparse article or not."
2883   `(memq ,article gnus-newsgroup-ancient))
2884
2885 (defun gnus-article-parent-p (number)
2886   "Say whether this article is a parent or not."
2887   (let ((data (gnus-data-find-list number)))
2888     (and (cdr data)              ; There has to be an article after...
2889          (< (gnus-data-level (car data)) ; And it has to have a higher level.
2890             (gnus-data-level (nth 1 data))))))
2891
2892 (defun gnus-article-children (number)
2893   "Return a list of all children to NUMBER."
2894   (let* ((data (gnus-data-find-list number))
2895          (level (gnus-data-level (car data)))
2896          children)
2897     (setq data (cdr data))
2898     (while (and data
2899                 (= (gnus-data-level (car data)) (1+ level)))
2900       (push (gnus-data-number (car data)) children)
2901       (setq data (cdr data)))
2902     children))
2903
2904 (defmacro gnus-summary-skip-intangible ()
2905   "If the current article is intangible, then jump to a different article."
2906   '(let ((to (get-text-property (point) 'gnus-intangible)))
2907      (and to (gnus-summary-goto-subject to))))
2908
2909 (defmacro gnus-summary-article-intangible-p ()
2910   "Say whether this article is intangible or not."
2911   '(get-text-property (point) 'gnus-intangible))
2912
2913 (defun gnus-article-read-p (article)
2914   "Say whether ARTICLE is read or not."
2915   (not (or (memq article gnus-newsgroup-marked)
2916            (memq article gnus-newsgroup-spam-marked)
2917            (memq article gnus-newsgroup-unreads)
2918            (memq article gnus-newsgroup-unselected)
2919            (memq article gnus-newsgroup-dormant))))
2920
2921 ;; Some summary mode macros.
2922
2923 (defmacro gnus-summary-article-number ()
2924   "The article number of the article on the current line.
2925 If there isn't an article number here, then we return the current
2926 article number."
2927   '(progn
2928      (gnus-summary-skip-intangible)
2929      (or (get-text-property (point) 'gnus-number)
2930          (gnus-summary-last-subject))))
2931
2932 (defmacro gnus-summary-article-header (&optional number)
2933   "Return the header of article NUMBER."
2934   `(gnus-data-header (gnus-data-find
2935                       ,(or number '(gnus-summary-article-number)))))
2936
2937 (defmacro gnus-summary-thread-level (&optional number)
2938   "Return the level of thread that starts with article NUMBER."
2939   `(if (and (eq gnus-summary-make-false-root 'dummy)
2940             (get-text-property (point) 'gnus-intangible))
2941        0
2942      (gnus-data-level (gnus-data-find
2943                        ,(or number '(gnus-summary-article-number))))))
2944
2945 (defmacro gnus-summary-article-mark (&optional number)
2946   "Return the mark of article NUMBER."
2947   `(gnus-data-mark (gnus-data-find
2948                     ,(or number '(gnus-summary-article-number)))))
2949
2950 (defmacro gnus-summary-article-pos (&optional number)
2951   "Return the position of the line of article NUMBER."
2952   `(gnus-data-pos (gnus-data-find
2953                    ,(or number '(gnus-summary-article-number)))))
2954
2955 (defalias 'gnus-summary-subject-string 'gnus-summary-article-subject)
2956 (defmacro gnus-summary-article-subject (&optional number)
2957   "Return current subject string or nil if nothing."
2958   `(let ((headers
2959           ,(if number
2960                `(gnus-data-header (assq ,number gnus-newsgroup-data))
2961              '(gnus-data-header (assq (gnus-summary-article-number)
2962                                       gnus-newsgroup-data)))))
2963      (and headers
2964           (vectorp headers)
2965           (mail-header-subject headers))))
2966
2967 (defmacro gnus-summary-article-score (&optional number)
2968   "Return current article score."
2969   `(or (cdr (assq ,(or number '(gnus-summary-article-number))
2970                   gnus-newsgroup-scored))
2971        gnus-summary-default-score 0))
2972
2973 (defun gnus-summary-article-children (&optional number)
2974   "Return a list of article numbers that are children of article NUMBER."
2975   (let* ((data (gnus-data-find-list (or number (gnus-summary-article-number))))
2976          (level (gnus-data-level (car data)))
2977          l children)
2978     (while (and (setq data (cdr data))
2979                 (> (setq l (gnus-data-level (car data))) level))
2980       (and (= (1+ level) l)
2981            (push (gnus-data-number (car data))
2982                  children)))
2983     (nreverse children)))
2984
2985 (defun gnus-summary-article-parent (&optional number)
2986   "Return the article number of the parent of article NUMBER."
2987   (let* ((data (gnus-data-find-list (or number (gnus-summary-article-number))
2988                                     (gnus-data-list t)))
2989          (level (gnus-data-level (car data))))
2990     (if (zerop level)
2991         ()                              ; This is a root.
2992       ;; We search until we find an article with a level less than
2993       ;; this one.  That function has to be the parent.
2994       (while (and (setq data (cdr data))
2995                   (not (< (gnus-data-level (car data)) level))))
2996       (and data (gnus-data-number (car data))))))
2997
2998 (defun gnus-unread-mark-p (mark)
2999   "Say whether MARK is the unread mark."
3000   (= mark gnus-unread-mark))
3001
3002 (defun gnus-read-mark-p (mark)
3003   "Say whether MARK is one of the marks that mark as read.
3004 This is all marks except unread, ticked, dormant, and expirable."
3005   (not (or (= mark gnus-unread-mark)
3006            (= mark gnus-ticked-mark)
3007            (= mark gnus-spam-mark)
3008            (= mark gnus-dormant-mark)
3009            (= mark gnus-expirable-mark))))
3010
3011 (defmacro gnus-article-mark (number)
3012   "Return the MARK of article NUMBER.
3013 This macro should only be used when computing the mark the \"first\"
3014 time; i.e., when generating the summary lines.  After that,
3015 `gnus-summary-article-mark' should be used to examine the
3016 marks of articles."
3017   `(cond
3018     ((memq ,number gnus-newsgroup-unsendable) gnus-unsendable-mark)
3019     ((memq ,number gnus-newsgroup-downloadable) gnus-downloadable-mark)
3020     ((memq ,number gnus-newsgroup-unreads) gnus-unread-mark)
3021     ((memq ,number gnus-newsgroup-marked) gnus-ticked-mark)
3022     ((memq ,number gnus-newsgroup-spam-marked) gnus-spam-mark)
3023     ((memq ,number gnus-newsgroup-dormant) gnus-dormant-mark)
3024     ((memq ,number gnus-newsgroup-expirable) gnus-expirable-mark)
3025     (t (or (cdr (assq ,number gnus-newsgroup-reads))
3026            gnus-ancient-mark))))
3027
3028 ;; Saving hidden threads.
3029
3030 (defmacro gnus-save-hidden-threads (&rest forms)
3031   "Save hidden threads, eval FORMS, and restore the hidden threads."
3032   (let ((config (make-symbol "config")))
3033     `(let ((,config (gnus-hidden-threads-configuration)))
3034        (unwind-protect
3035            (save-excursion
3036              ,@forms)
3037          (gnus-restore-hidden-threads-configuration ,config)))))
3038 (put 'gnus-save-hidden-threads 'lisp-indent-function 0)
3039 (put 'gnus-save-hidden-threads 'edebug-form-spec '(body))
3040
3041 (defun gnus-data-compute-positions ()
3042   "Compute the positions of all articles."
3043   (setq gnus-newsgroup-data-reverse nil)
3044   (let ((data gnus-newsgroup-data))
3045     (save-excursion
3046       (gnus-save-hidden-threads
3047         (gnus-summary-show-all-threads)
3048         (goto-char (point-min))
3049         (while data
3050           (while (get-text-property (point) 'gnus-intangible)
3051             (forward-line 1))
3052           (gnus-data-set-pos (car data) (+ (point) 3))
3053           (setq data (cdr data))
3054           (forward-line 1))))))
3055
3056 (defun gnus-hidden-threads-configuration ()
3057   "Return the current hidden threads configuration."
3058   (save-excursion
3059     (let (config)
3060       (goto-char (point-min))
3061       (while (search-forward "\r" nil t)
3062         (push (1- (point)) config))
3063       config)))
3064
3065 (defun gnus-restore-hidden-threads-configuration (config)
3066   "Restore hidden threads configuration from CONFIG."
3067   (save-excursion
3068     (let (point buffer-read-only)
3069       (while (setq point (pop config))
3070         (when (and (< point (point-max))
3071                    (goto-char point)
3072                    (eq (char-after) ?\n))
3073           (subst-char-in-region point (1+ point) ?\n ?\r))))))
3074
3075 ;; Various summary mode internalish functions.
3076
3077 (defun gnus-mouse-pick-article (e)
3078   (interactive "e")
3079   (mouse-set-point e)
3080   (gnus-summary-next-page nil t))
3081
3082 (defun gnus-summary-set-display-table ()
3083   "Change the display table.
3084 Odd characters have a tendency to mess
3085 up nicely formatted displays - we make all possible glyphs
3086 display only a single character."
3087
3088   ;; We start from the standard display table, if any.
3089   (let ((table (or (copy-sequence standard-display-table)
3090                    (make-display-table)))
3091         (i 32))
3092     ;; Nix out all the control chars...
3093     (while (>= (setq i (1- i)) 0)
3094       (aset table i [??]))
3095    ;; ... but not newline and cr, of course.  (cr is necessary for the
3096     ;; selective display).
3097     (aset table ?\n nil)
3098     (aset table ?\r nil)
3099     ;; We keep TAB as well.
3100     (aset table ?\t nil)
3101     ;; We nix out any glyphs 127 through 255, or 127 through 159 in
3102     ;; Emacs 23 (unicode), that are not set already.
3103     (let ((i (if (ignore-errors (= (make-char 'latin-iso8859-1 160) 160))
3104                  160
3105                256)))
3106       (while (>= (setq i (1- i)) 127)
3107         ;; Only modify if the entry is nil.
3108         (unless (aref table i)
3109           (aset table i [??]))))
3110     (setq buffer-display-table table)))
3111
3112 (defun gnus-summary-set-article-display-arrow (pos)
3113   "Update the overlay arrow to point to line at position POS."
3114   (when (and gnus-summary-display-arrow
3115              (boundp 'overlay-arrow-position)
3116              (boundp 'overlay-arrow-string))
3117     (save-excursion
3118       (goto-char pos)
3119       (beginning-of-line)
3120       (unless overlay-arrow-position
3121         (setq overlay-arrow-position (make-marker)))
3122       (setq overlay-arrow-string "=>"
3123             overlay-arrow-position (set-marker overlay-arrow-position
3124                                                (point)
3125                                                (current-buffer))))))
3126
3127 (defun gnus-summary-setup-buffer (group)
3128   "Initialize summary buffer."
3129   (let ((buffer (gnus-summary-buffer-name group))
3130         (dead-name (concat "*Dead Summary "
3131                            (gnus-group-decoded-name group) "*")))
3132     ;; If a dead summary buffer exists, we kill it.
3133     (when (gnus-buffer-live-p dead-name)
3134       (gnus-kill-buffer dead-name))
3135     (if (get-buffer buffer)
3136         (progn
3137           (set-buffer buffer)
3138           (setq gnus-summary-buffer (current-buffer))
3139           (not gnus-newsgroup-prepared))
3140       ;; Fix by Sudish Joseph <joseph@cis.ohio-state.edu>
3141       (setq gnus-summary-buffer (set-buffer (gnus-get-buffer-create buffer)))
3142       (gnus-summary-mode group)
3143       (when gnus-carpal
3144         (gnus-carpal-setup-buffer 'summary))
3145       (unless gnus-single-article-buffer
3146         (make-local-variable 'gnus-article-buffer)
3147         (make-local-variable 'gnus-article-current)
3148         (make-local-variable 'gnus-original-article-buffer))
3149       (setq gnus-newsgroup-name group)
3150       ;; Set any local variables in the group parameters.
3151       (gnus-summary-set-local-parameters gnus-newsgroup-name)
3152       t)))
3153
3154 (defun gnus-set-global-variables ()
3155   "Set the global equivalents of the buffer-local variables.
3156 They are set to the latest values they had.  These reflect the summary
3157 buffer that was in action when the last article was fetched."
3158   (when (eq major-mode 'gnus-summary-mode)
3159     (setq gnus-summary-buffer (current-buffer))
3160     (let ((name gnus-newsgroup-name)
3161           (marked gnus-newsgroup-marked)
3162           (spam gnus-newsgroup-spam-marked)
3163           (unread gnus-newsgroup-unreads)
3164           (headers gnus-current-headers)
3165           (data gnus-newsgroup-data)
3166           (summary gnus-summary-buffer)
3167           (article-buffer gnus-article-buffer)
3168           (original gnus-original-article-buffer)
3169           (gac gnus-article-current)
3170           (reffed gnus-reffed-article-number)
3171           (score-file gnus-current-score-file)
3172           (default-charset gnus-newsgroup-charset)
3173           vlist)
3174       (let ((locals gnus-newsgroup-variables))
3175         (while locals
3176           (if (consp (car locals))
3177               (push (eval (caar locals)) vlist)
3178             (push (eval (car locals)) vlist))
3179           (setq locals (cdr locals)))
3180         (setq vlist (nreverse vlist)))
3181       (save-excursion
3182         (set-buffer gnus-group-buffer)
3183         (setq gnus-newsgroup-name name
3184               gnus-newsgroup-marked marked
3185               gnus-newsgroup-spam-marked spam
3186               gnus-newsgroup-unreads unread
3187               gnus-current-headers headers
3188               gnus-newsgroup-data data
3189               gnus-article-current gac
3190               gnus-summary-buffer summary
3191               gnus-article-buffer article-buffer
3192               gnus-original-article-buffer original
3193               gnus-reffed-article-number reffed
3194               gnus-current-score-file score-file
3195               gnus-newsgroup-charset default-charset)
3196         (let ((locals gnus-newsgroup-variables))
3197           (while locals
3198             (if (consp (car locals))
3199                 (set (caar locals) (pop vlist))
3200               (set (car locals) (pop vlist)))
3201             (setq locals (cdr locals))))
3202         ;; The article buffer also has local variables.
3203         (when (gnus-buffer-live-p gnus-article-buffer)
3204           (set-buffer gnus-article-buffer)
3205           (setq gnus-summary-buffer summary))))))
3206
3207 (defun gnus-summary-article-unread-p (article)
3208   "Say whether ARTICLE is unread or not."
3209   (memq article gnus-newsgroup-unreads))
3210
3211 (defun gnus-summary-first-article-p (&optional article)
3212   "Return whether ARTICLE is the first article in the buffer."
3213   (if (not (setq article (or article (gnus-summary-article-number))))
3214       nil
3215     (eq article (caar gnus-newsgroup-data))))
3216
3217 (defun gnus-summary-last-article-p (&optional article)
3218   "Return whether ARTICLE is the last article in the buffer."
3219   (if (not (setq article (or article (gnus-summary-article-number))))
3220       ;; All non-existent numbers are the last article.  :-)
3221       t
3222     (not (cdr (gnus-data-find-list article)))))
3223
3224 (defun gnus-make-thread-indent-array ()
3225   (let ((n 200))
3226     (unless (and gnus-thread-indent-array
3227                  (= gnus-thread-indent-level gnus-thread-indent-array-level))
3228       (setq gnus-thread-indent-array (make-vector 201 "")
3229             gnus-thread-indent-array-level gnus-thread-indent-level)
3230       (while (>= n 0)
3231         (aset gnus-thread-indent-array n
3232               (make-string (* n gnus-thread-indent-level) ? ))
3233         (setq n (1- n))))))
3234
3235 (defun gnus-update-summary-mark-positions ()
3236   "Compute where the summary marks are to go."
3237   (save-excursion
3238     (when (gnus-buffer-exists-p gnus-summary-buffer)
3239       (set-buffer gnus-summary-buffer))
3240     (let ((spec gnus-summary-line-format-spec)
3241           pos)
3242       (save-excursion
3243         (gnus-set-work-buffer)
3244         (let ((gnus-tmp-unread ?Z)
3245               (gnus-replied-mark ?Z)
3246               (gnus-score-below-mark ?Z)
3247               (gnus-score-over-mark ?Z)
3248               (gnus-undownloaded-mark ?Z)
3249               (gnus-summary-line-format-spec spec)
3250               (gnus-newsgroup-downloadable '(0))
3251               (header [0 "" "" "05 Apr 2001 23:33:09 +0400" "" "" 0 0 "" nil])
3252               case-fold-search ignores)
3253           ;; Here, all marks are bound to Z.
3254           (gnus-summary-insert-line header
3255                                     0 nil t gnus-tmp-unread t nil "" nil 1)
3256           (goto-char (point-min))
3257           ;; Memorize the positions of the same characters as dummy marks.
3258           (while (re-search-forward "[A-D]" nil t)
3259             (push (point) ignores))
3260           (erase-buffer)
3261           ;; We use A-D as dummy marks in order to know column positions
3262           ;; where marks should be inserted.
3263           (setq gnus-tmp-unread ?A
3264                 gnus-replied-mark ?B
3265                 gnus-score-below-mark ?C
3266                 gnus-score-over-mark ?C
3267                 gnus-undownloaded-mark ?D)
3268           (gnus-summary-insert-line header
3269                                     0 nil t gnus-tmp-unread t nil "" nil 1)
3270           ;; Ignore characters which aren't dummy marks.
3271           (dolist (p ignores)
3272             (delete-region (goto-char (1- p)) p)
3273             (insert ?Z))
3274           (goto-char (point-min))
3275           (setq pos (list (cons 'unread
3276                                 (and (search-forward "A" nil t)
3277                                      (- (point) (point-min) 1)))))
3278           (goto-char (point-min))
3279           (push (cons 'replied (and (search-forward "B" nil t)
3280                                     (- (point) (point-min) 1)))
3281                 pos)
3282           (goto-char (point-min))
3283           (push (cons 'score (and (search-forward "C" nil t)
3284                                   (- (point) (point-min) 1)))
3285                 pos)
3286           (goto-char (point-min))
3287           (push (cons 'download (and (search-forward "D" nil t)
3288                                      (- (point) (point-min) 1)))
3289                 pos)))
3290       (setq gnus-summary-mark-positions pos))))
3291
3292 (defun gnus-summary-insert-dummy-line (gnus-tmp-subject gnus-tmp-number)
3293   "Insert a dummy root in the summary buffer."
3294   (beginning-of-line)
3295   (gnus-add-text-properties
3296    (point) (progn (eval gnus-summary-dummy-line-format-spec) (point))
3297    (list 'gnus-number gnus-tmp-number 'gnus-intangible gnus-tmp-number)))
3298
3299 (defun gnus-summary-extract-address-component (from)
3300   (or (car (funcall gnus-extract-address-components from))
3301       from))
3302
3303 (defun gnus-summary-from-or-to-or-newsgroups (header gnus-tmp-from)
3304   (let ((mail-parse-charset gnus-newsgroup-charset)
3305         ; Is it really necessary to do this next part for each summary line?
3306         ; Luckily, doesn't seem to slow things down much.
3307         (mail-parse-ignored-charsets
3308          (save-excursion (set-buffer gnus-summary-buffer)
3309                          gnus-newsgroup-ignored-charsets)))
3310     (or
3311      (and gnus-ignored-from-addresses
3312           (string-match gnus-ignored-from-addresses gnus-tmp-from)
3313           (let ((extra-headers (mail-header-extra header))
3314                 to
3315                 newsgroups)
3316             (cond
3317              ((setq to (cdr (assq 'To extra-headers)))
3318               (concat "-> "
3319                       (inline
3320                         (gnus-summary-extract-address-component
3321                          (funcall gnus-decode-encoded-word-function to)))))
3322              ((setq newsgroups (cdr (assq 'Newsgroups extra-headers)))
3323               (concat "=> " newsgroups)))))
3324      (inline (gnus-summary-extract-address-component gnus-tmp-from)))))
3325
3326 (defun gnus-summary-insert-line (gnus-tmp-header
3327                                  gnus-tmp-level gnus-tmp-current
3328                                  undownloaded gnus-tmp-unread gnus-tmp-replied
3329                                  gnus-tmp-expirable gnus-tmp-subject-or-nil
3330                                  &optional gnus-tmp-dummy gnus-tmp-score
3331                                  gnus-tmp-process)
3332   (let* ((gnus-tmp-indentation (aref gnus-thread-indent-array gnus-tmp-level))
3333          (gnus-tmp-lines (mail-header-lines gnus-tmp-header))
3334          (gnus-tmp-score (or gnus-tmp-score gnus-summary-default-score 0))
3335          (gnus-tmp-score-char
3336           (if (or (null gnus-summary-default-score)
3337                   (<= (abs (- gnus-tmp-score gnus-summary-default-score))
3338                       gnus-summary-zcore-fuzz))
3339               ?                         ;Whitespace
3340             (if (< gnus-tmp-score gnus-summary-default-score)
3341                 gnus-score-below-mark gnus-score-over-mark)))
3342          (gnus-tmp-number (mail-header-number gnus-tmp-header))
3343          (gnus-tmp-replied
3344           (cond (gnus-tmp-process gnus-process-mark)
3345                 ((memq gnus-tmp-current gnus-newsgroup-cached)
3346                  gnus-cached-mark)
3347                 (gnus-tmp-replied gnus-replied-mark)
3348                 ((memq gnus-tmp-current gnus-newsgroup-forwarded)
3349                  gnus-forwarded-mark)
3350                 ((memq gnus-tmp-current gnus-newsgroup-saved)
3351                  gnus-saved-mark)
3352                 ((memq gnus-tmp-number gnus-newsgroup-recent)
3353                  gnus-recent-mark)
3354                 ((memq gnus-tmp-number gnus-newsgroup-unseen)
3355                  gnus-unseen-mark)
3356                 (t gnus-no-mark)))
3357          (gnus-tmp-downloaded
3358           (cond (undownloaded
3359                  gnus-undownloaded-mark)
3360                 (gnus-newsgroup-agentized
3361                  gnus-downloaded-mark)
3362                 (t
3363                  gnus-no-mark)))
3364          (gnus-tmp-from (mail-header-from gnus-tmp-header))
3365          (gnus-tmp-name
3366           (cond
3367            ((string-match "<[^>]+> *$" gnus-tmp-from)
3368             (let ((beg (match-beginning 0)))
3369               (or (and (string-match "^\".+\"" gnus-tmp-from)
3370                        (substring gnus-tmp-from 1 (1- (match-end 0))))
3371                   (substring gnus-tmp-from 0 beg))))
3372            ((string-match "(.+)" gnus-tmp-from)
3373             (substring gnus-tmp-from
3374                        (1+ (match-beginning 0)) (1- (match-end 0))))
3375            (t gnus-tmp-from)))
3376          (gnus-tmp-subject (mail-header-subject gnus-tmp-header))
3377          (gnus-tmp-opening-bracket (if gnus-tmp-dummy ?\< ?\[))
3378          (gnus-tmp-closing-bracket (if gnus-tmp-dummy ?\> ?\]))
3379          (buffer-read-only nil))
3380     (when (string= gnus-tmp-name "")
3381       (setq gnus-tmp-name gnus-tmp-from))
3382     (unless (numberp gnus-tmp-lines)
3383       (setq gnus-tmp-lines -1))
3384     (if (= gnus-tmp-lines -1)
3385         (setq gnus-tmp-lines "?")
3386       (setq gnus-tmp-lines (number-to-string gnus-tmp-lines)))
3387       (gnus-put-text-property
3388      (point)
3389      (progn (eval gnus-summary-line-format-spec) (point))
3390        'gnus-number gnus-tmp-number)
3391     (when (gnus-visual-p 'summary-highlight 'highlight)
3392       (forward-line -1)
3393       (gnus-run-hooks 'gnus-summary-update-hook)
3394       (forward-line 1))))
3395
3396 (defun gnus-summary-update-line (&optional dont-update)
3397   "Update summary line after change."
3398   (when (and gnus-summary-default-score
3399              (not gnus-summary-inhibit-highlight))
3400     (let* ((gnus-summary-inhibit-highlight t) ; Prevent recursion.
3401            (article (gnus-summary-article-number))
3402            (score (gnus-summary-article-score article)))
3403       (unless dont-update
3404         (if (and gnus-summary-mark-below
3405                  (< (gnus-summary-article-score)
3406                     gnus-summary-mark-below))
3407             ;; This article has a low score, so we mark it as read.
3408             (when (memq article gnus-newsgroup-unreads)
3409               (gnus-summary-mark-article-as-read gnus-low-score-mark))
3410           (when (eq (gnus-summary-article-mark) gnus-low-score-mark)
3411             ;; This article was previously marked as read on account
3412             ;; of a low score, but now it has risen, so we mark it as
3413             ;; unread.
3414             (gnus-summary-mark-article-as-unread gnus-unread-mark)))
3415         (gnus-summary-update-mark
3416          (if (or (null gnus-summary-default-score)
3417                  (<= (abs (- score gnus-summary-default-score))
3418                      gnus-summary-zcore-fuzz))
3419              ?                          ;Whitespace
3420            (if (< score gnus-summary-default-score)
3421                gnus-score-below-mark gnus-score-over-mark))
3422          'score))
3423       ;; Do visual highlighting.
3424       (when (gnus-visual-p 'summary-highlight 'highlight)
3425         (gnus-run-hooks 'gnus-summary-update-hook)))))
3426
3427 (defvar gnus-tmp-new-adopts nil)
3428
3429 (defun gnus-summary-number-of-articles-in-thread (thread &optional level char)
3430   "Return the number of articles in THREAD.
3431 This may be 0 in some cases -- if none of the articles in
3432 the thread are to be displayed."
3433   (let* ((number
3434          ;; Fix by Luc Van Eycken <Luc.VanEycken@esat.kuleuven.ac.be>.
3435           (cond
3436            ((not (listp thread))
3437             1)
3438            ((and (consp thread) (cdr thread))
3439             (apply
3440              '+ 1 (mapcar
3441                    'gnus-summary-number-of-articles-in-thread (cdr thread))))
3442            ((null thread)
3443             1)
3444            ((memq (mail-header-number (car thread)) gnus-newsgroup-limit)
3445             1)
3446            (t 0))))
3447     (when (and level (zerop level) gnus-tmp-new-adopts)
3448       (incf number
3449             (apply '+ (mapcar
3450                        'gnus-summary-number-of-articles-in-thread
3451                        gnus-tmp-new-adopts))))
3452     (if char
3453         (if (> number 1) gnus-not-empty-thread-mark
3454           gnus-empty-thread-mark)
3455       number)))
3456
3457 (defsubst gnus-summary-line-message-size (head)
3458   "Return pretty-printed version of message size.
3459 This function is intended to be used in
3460 `gnus-summary-line-format-alist'."
3461   (let ((c (or (mail-header-chars head) -1)))
3462     (cond ((< c 0) "n/a")               ; chars not available
3463           ((< c (* 1000 10)) (format "%1.1fk" (/ c 1024.0)))
3464           ((< c (* 1000 100)) (format "%dk" (/ c 1024.0)))
3465           ((< c (* 1000 10000)) (format "%1.1fM" (/ c (* 1024.0 1024))))
3466           (t (format "%dM" (/ c (* 1024.0 1024)))))))
3467
3468
3469 (defun gnus-summary-set-local-parameters (group)
3470   "Go through the local params of GROUP and set all variable specs in that list."
3471   (let ((params (gnus-group-find-parameter group))
3472         (vars '(quit-config))           ; Ignore quit-config.
3473         elem)
3474     (while params
3475       (setq elem (car params)
3476             params (cdr params))
3477       (and (consp elem)                 ; Has to be a cons.
3478            (consp (cdr elem))           ; The cdr has to be a list.
3479            (symbolp (car elem))         ; Has to be a symbol in there.
3480            (not (memq (car elem) vars))
3481            (ignore-errors               ; So we set it.
3482              (push (car elem) vars)
3483              (make-local-variable (car elem))
3484              (set (car elem) (eval (nth 1 elem))))))))
3485
3486 (defun gnus-summary-read-group (group &optional show-all no-article
3487                                       kill-buffer no-display backward
3488                                       select-articles)
3489   "Start reading news in newsgroup GROUP.
3490 If SHOW-ALL is non-nil, already read articles are also listed.
3491 If NO-ARTICLE is non-nil, no article is selected initially.
3492 If NO-DISPLAY, don't generate a summary buffer."
3493   (let (result)
3494     (while (and group
3495                 (null (setq result
3496                             (let ((gnus-auto-select-next nil))
3497                               (or (gnus-summary-read-group-1
3498                                    group show-all no-article
3499                                    kill-buffer no-display
3500                                    select-articles)
3501                                   (setq show-all nil
3502                                         select-articles nil)))))
3503                 (eq gnus-auto-select-next 'quietly))
3504       (set-buffer gnus-group-buffer)
3505       ;; The entry function called above goes to the next
3506       ;; group automatically, so we go two groups back
3507       ;; if we are searching for the previous group.
3508       (when backward
3509         (gnus-group-prev-unread-group 2))
3510       (if (not (equal group (gnus-group-group-name)))
3511           (setq group (gnus-group-group-name))
3512         (setq group nil)))
3513     result))
3514
3515 (defun gnus-summary-read-group-1 (group show-all no-article
3516                                         kill-buffer no-display
3517                                         &optional select-articles)
3518   ;; Killed foreign groups can't be entered.
3519   ;;  (when (and (not (gnus-group-native-p group))
3520   ;;         (not (gnus-gethash group gnus-newsrc-hashtb)))
3521   ;;    (error "Dead non-native groups can't be entered"))
3522   (gnus-message 5 "Retrieving newsgroup: %s..."
3523                 (gnus-group-decoded-name group))
3524   (let* ((new-group (gnus-summary-setup-buffer group))
3525          (quit-config (gnus-group-quit-config group))
3526          (did-select (and new-group (gnus-select-newsgroup
3527                                      group show-all select-articles))))
3528     (cond
3529      ;; This summary buffer exists already, so we just select it.
3530      ((not new-group)
3531       (gnus-set-global-variables)
3532       (when kill-buffer
3533         (gnus-kill-or-deaden-summary kill-buffer))
3534       (gnus-configure-windows 'summary 'force)
3535       (gnus-set-mode-line 'summary)
3536       (gnus-summary-position-point)
3537       (message "")
3538       t)
3539      ;; We couldn't select this group.
3540      ((null did-select)
3541       (when (and (eq major-mode 'gnus-summary-mode)
3542                  (not (equal (current-buffer) kill-buffer)))
3543         (kill-buffer (current-buffer))
3544         (if (not quit-config)
3545             (progn
3546               ;; Update the info -- marks might need to be removed,
3547               ;; for instance.
3548               (gnus-summary-update-info)
3549               (set-buffer gnus-group-buffer)
3550               (gnus-group-jump-to-group group)
3551               (gnus-group-next-unread-group 1))
3552           (gnus-handle-ephemeral-exit quit-config)))
3553       (let ((grpinfo (gnus-get-info group)))
3554         (if (null (gnus-info-read grpinfo))
3555             (gnus-message 3 "Group %s contains no messages"
3556                           (gnus-group-decoded-name group))
3557           (gnus-message 3 "Can't select group")))
3558       nil)
3559      ;; The user did a `C-g' while prompting for number of articles,
3560      ;; so we exit this group.
3561      ((eq did-select 'quit)
3562       (and (eq major-mode 'gnus-summary-mode)
3563            (not (equal (current-buffer) kill-buffer))
3564            (kill-buffer (current-buffer)))
3565       (when kill-buffer
3566         (gnus-kill-or-deaden-summary kill-buffer))
3567       (if (not quit-config)
3568           (progn
3569             (set-buffer gnus-group-buffer)
3570             (gnus-group-jump-to-group group)
3571             (gnus-group-next-unread-group 1)
3572             (gnus-configure-windows 'group 'force))
3573         (gnus-handle-ephemeral-exit quit-config))
3574       ;; Finally signal the quit.
3575       (signal 'quit nil))
3576      ;; The group was successfully selected.
3577      (t
3578       (gnus-set-global-variables)
3579       ;; Save the active value in effect when the group was entered.
3580       (setq gnus-newsgroup-active
3581             (gnus-copy-sequence
3582              (gnus-active gnus-newsgroup-name)))
3583       ;; You can change the summary buffer in some way with this hook.
3584       (gnus-run-hooks 'gnus-select-group-hook)
3585       (when (memq 'summary (gnus-update-format-specifications
3586                             nil 'summary 'summary-mode 'summary-dummy))
3587         ;; The format specification for the summary line was updated,
3588         ;; so we need to update the mark positions as well.
3589         (gnus-update-summary-mark-positions))
3590       ;; Do score processing.
3591       (when gnus-use-scoring
3592         (gnus-possibly-score-headers))
3593       ;; Check whether to fill in the gaps in the threads.
3594       (when gnus-build-sparse-threads
3595         (gnus-build-sparse-threads))
3596       ;; Find the initial limit.
3597       (if gnus-show-threads
3598           (if show-all
3599               (let ((gnus-newsgroup-dormant nil))
3600                 (gnus-summary-initial-limit show-all))
3601             (gnus-summary-initial-limit show-all))
3602         ;; When unthreaded, all articles are always shown.
3603         (setq gnus-newsgroup-limit
3604               (mapcar
3605                (lambda (header) (mail-header-number header))
3606                gnus-newsgroup-headers)))
3607       ;; Generate the summary buffer.
3608       (unless no-display
3609         (gnus-summary-prepare))
3610       (when gnus-use-trees
3611         (gnus-tree-open group)
3612         (setq gnus-summary-highlight-line-function
3613               'gnus-tree-highlight-article))
3614       ;; If the summary buffer is empty, but there are some low-scored
3615       ;; articles or some excluded dormants, we include these in the
3616       ;; buffer.
3617       (when (and (zerop (buffer-size))
3618                  (not no-display))
3619         (cond (gnus-newsgroup-dormant
3620                (gnus-summary-limit-include-dormant))
3621               ((and gnus-newsgroup-scored show-all)
3622                (gnus-summary-limit-include-expunged t))))
3623       ;; Function `gnus-apply-kill-file' must be called in this hook.
3624       (gnus-run-hooks 'gnus-apply-kill-hook)
3625       (if (and (zerop (buffer-size))
3626                (not no-display))
3627           (progn
3628             ;; This newsgroup is empty.
3629             (gnus-summary-catchup-and-exit nil t)
3630             (gnus-message 6 "No unread news")
3631             (when kill-buffer
3632               (gnus-kill-or-deaden-summary kill-buffer))
3633             ;; Return nil from this function.
3634             nil)
3635         ;; Hide conversation thread subtrees.  We cannot do this in
3636         ;; gnus-summary-prepare-hook since kill processing may not
3637         ;; work with hidden articles.
3638         (gnus-summary-maybe-hide-threads)
3639         (when kill-buffer
3640           (gnus-kill-or-deaden-summary kill-buffer))
3641         (gnus-summary-auto-select-subject)
3642         ;; Show first unread article if requested.
3643         (if (and (not no-article)
3644                  (not no-display)
3645                  gnus-newsgroup-unreads
3646                  gnus-auto-select-first)
3647             (progn
3648               (gnus-configure-windows 'summary)
3649               (let ((art (gnus-summary-article-number)))
3650                 (unless (and (not gnus-plugged)
3651                              (or (memq art gnus-newsgroup-undownloaded)
3652                                  (memq art gnus-newsgroup-downloadable)))
3653                   (gnus-summary-goto-article art))))
3654           ;; Don't select any articles.
3655           (gnus-summary-position-point)
3656           (gnus-configure-windows 'summary 'force)
3657           (gnus-set-mode-line 'summary))
3658         (when (and gnus-auto-center-group
3659                    (get-buffer-window gnus-group-buffer t))
3660           ;; Gotta use windows, because recenter does weird stuff if
3661           ;; the current buffer ain't the displayed window.
3662           (let ((owin (selected-window)))
3663             (select-window (get-buffer-window gnus-group-buffer t))
3664             (when (gnus-group-goto-group group)
3665               (recenter))
3666             (select-window owin)))
3667         ;; Mark this buffer as "prepared".
3668         (setq gnus-newsgroup-prepared t)
3669         (gnus-run-hooks 'gnus-summary-prepared-hook)
3670         (unless (gnus-ephemeral-group-p group)
3671           (gnus-group-update-group group))
3672         t)))))
3673
3674 (defun gnus-summary-auto-select-subject ()
3675   "Select the subject line on initial group entry."
3676   (goto-char (point-min))
3677   (cond
3678    ((eq gnus-auto-select-subject 'best)
3679     (gnus-summary-best-unread-subject))
3680    ((eq gnus-auto-select-subject 'unread)
3681     (gnus-summary-first-unread-subject))
3682    ((eq gnus-auto-select-subject 'unseen)
3683     (gnus-summary-first-unseen-subject))
3684    ((eq gnus-auto-select-subject 'unseen-or-unread)
3685     (gnus-summary-first-unseen-or-unread-subject))
3686    ((eq gnus-auto-select-subject 'first)
3687     ;; Do nothing.
3688     )
3689    ((functionp gnus-auto-select-subject)
3690     (funcall gnus-auto-select-subject))))
3691
3692 (defun gnus-summary-prepare ()
3693   "Generate the summary buffer."
3694   (interactive)
3695   (let ((buffer-read-only nil))
3696     (erase-buffer)
3697     (setq gnus-newsgroup-data nil
3698           gnus-newsgroup-data-reverse nil)
3699     (gnus-run-hooks 'gnus-summary-generate-hook)
3700     ;; Generate the buffer, either with threads or without.
3701     (when gnus-newsgroup-headers
3702       (gnus-summary-prepare-threads
3703        (if gnus-show-threads
3704            (gnus-sort-gathered-threads
3705             (funcall gnus-summary-thread-gathering-function
3706                      (gnus-sort-threads
3707                       (gnus-cut-threads (gnus-make-threads)))))
3708          ;; Unthreaded display.
3709          (gnus-sort-articles gnus-newsgroup-headers))))
3710     (setq gnus-newsgroup-data (nreverse gnus-newsgroup-data))
3711     ;; Call hooks for modifying summary buffer.
3712     (goto-char (point-min))
3713     (gnus-run-hooks 'gnus-summary-prepare-hook)))
3714
3715 (defsubst gnus-general-simplify-subject (subject)
3716   "Simplify subject by the same rules as `gnus-gather-threads-by-subject'."
3717   (setq subject
3718         (cond
3719          ;; Truncate the subject.
3720          (gnus-simplify-subject-functions
3721           (gnus-map-function gnus-simplify-subject-functions subject))
3722          ((numberp gnus-summary-gather-subject-limit)
3723           (setq subject (gnus-simplify-subject-re subject))
3724           (if (> (length subject) gnus-summary-gather-subject-limit)
3725               (substring subject 0 gnus-summary-gather-subject-limit)
3726             subject))
3727          ;; Fuzzily simplify it.
3728          ((eq 'fuzzy gnus-summary-gather-subject-limit)
3729           (gnus-simplify-subject-fuzzy subject))
3730          ;; Just remove the leading "Re:".
3731          (t
3732           (gnus-simplify-subject-re subject))))
3733
3734   (if (and gnus-summary-gather-exclude-subject
3735            (string-match gnus-summary-gather-exclude-subject subject))
3736       nil                         ; This article shouldn't be gathered
3737     subject))
3738
3739 (defun gnus-summary-simplify-subject-query ()
3740   "Query where the respool algorithm would put this article."
3741   (interactive)
3742   (gnus-summary-select-article)
3743   (message (gnus-general-simplify-subject (gnus-summary-article-subject))))
3744
3745 (defun gnus-gather-threads-by-subject (threads)
3746   "Gather threads by looking at Subject headers."
3747   (if (not gnus-summary-make-false-root)
3748       threads
3749     (let ((hashtb (gnus-make-hashtable 1024))
3750           (prev threads)
3751           (result threads)
3752           subject hthread whole-subject)
3753       (while threads
3754         (setq subject (gnus-general-simplify-subject
3755                        (setq whole-subject (mail-header-subject
3756                                             (caar threads)))))
3757         (when subject
3758           (if (setq hthread (gnus-gethash subject hashtb))
3759               (progn
3760                 ;; We enter a dummy root into the thread, if we
3761                 ;; haven't done that already.
3762                 (unless (stringp (caar hthread))
3763                   (setcar hthread (list whole-subject (car hthread))))
3764                 ;; We add this new gathered thread to this gathered
3765                 ;; thread.
3766                 (setcdr (car hthread)
3767                         (nconc (cdar hthread) (list (car threads))))
3768                 ;; Remove it from the list of threads.
3769                 (setcdr prev (cdr threads))
3770                 (setq threads prev))
3771             ;; Enter this thread into the hash table.
3772             (gnus-sethash subject
3773                           (if gnus-summary-make-false-root-always
3774                               (progn
3775                                 ;; If you want a dummy root above all
3776                                 ;; threads...
3777                                 (setcar threads (list whole-subject
3778                                                       (car threads)))
3779                                 threads)
3780                             threads)
3781                           hashtb)))
3782         (setq prev threads)
3783         (setq threads (cdr threads)))
3784       result)))
3785
3786 (defun gnus-gather-threads-by-references (threads)
3787   "Gather threads by looking at References headers."
3788   (let ((idhashtb (gnus-make-hashtable 1024))
3789         (thhashtb (gnus-make-hashtable 1024))
3790         (prev threads)
3791         (result threads)
3792         ids references id gthread gid entered ref)
3793     (while threads
3794       (when (setq references (mail-header-references (caar threads)))
3795         (setq id (mail-header-id (caar threads))
3796               ids (inline (gnus-split-references references))
3797               entered nil)
3798         (while (setq ref (pop ids))
3799           (setq ids (delete ref ids))
3800           (if (not (setq gid (gnus-gethash ref idhashtb)))
3801               (progn
3802                 (gnus-sethash ref id idhashtb)
3803                 (gnus-sethash id threads thhashtb))
3804             (setq gthread (gnus-gethash gid thhashtb))
3805             (unless entered
3806               ;; We enter a dummy root into the thread, if we
3807               ;; haven't done that already.
3808               (unless (stringp (caar gthread))
3809                 (setcar gthread (list (mail-header-subject (caar gthread))
3810                                       (car gthread))))
3811               ;; We add this new gathered thread to this gathered
3812               ;; thread.
3813               (setcdr (car gthread)
3814                       (nconc (cdar gthread) (list (car threads)))))
3815             ;; Add it into the thread hash table.
3816             (gnus-sethash id gthread thhashtb)
3817             (setq entered t)
3818             ;; Remove it from the list of threads.
3819             (setcdr prev (cdr threads))
3820             (setq threads prev))))
3821       (setq prev threads)
3822       (setq threads (cdr threads)))
3823     result))
3824
3825 (defun gnus-sort-gathered-threads (threads)
3826   "Sort subtreads inside each gathered thread by `gnus-sort-gathered-threads-function'."
3827   (let ((result threads))
3828     (while threads
3829       (when (stringp (caar threads))
3830         (setcdr (car threads)
3831                 (sort (cdar threads) gnus-sort-gathered-threads-function)))
3832       (setq threads (cdr threads)))
3833     result))
3834
3835 (defun gnus-thread-loop-p (root thread)
3836   "Say whether ROOT is in THREAD."
3837   (let ((stack (list thread))
3838         (infloop 0)
3839         th)
3840     (while (setq thread (pop stack))
3841       (setq th (cdr thread))
3842       (while (and th
3843                   (not (eq (caar th) root)))
3844         (pop th))
3845       (if th
3846           ;; We have found a loop.
3847           (let (ref-dep)
3848             (setcdr thread (delq (car th) (cdr thread)))
3849             (if (boundp (setq ref-dep (intern "none"
3850                                               gnus-newsgroup-dependencies)))
3851                 (setcdr (symbol-value ref-dep)
3852                         (nconc (cdr (symbol-value ref-dep))
3853                                (list (car th))))
3854               (set ref-dep (list nil (car th))))
3855             (setq infloop 1
3856                   stack nil))
3857         ;; Push all the subthreads onto the stack.
3858         (push (cdr thread) stack)))
3859     infloop))
3860
3861 (defun gnus-make-threads ()
3862   "Go through the dependency hashtb and find the roots.  Return all threads."
3863   (let (threads)
3864     (while (catch 'infloop
3865              (mapatoms
3866               (lambda (refs)
3867                 ;; Deal with self-referencing References loops.
3868                 (when (and (car (symbol-value refs))
3869                            (not (zerop
3870                                  (apply
3871                                   '+
3872                                   (mapcar
3873                                    (lambda (thread)
3874                                      (gnus-thread-loop-p
3875                                       (car (symbol-value refs)) thread))
3876                                    (cdr (symbol-value refs)))))))
3877                   (setq threads nil)
3878                   (throw 'infloop t))
3879                 (unless (car (symbol-value refs))
3880                   ;; These threads do not refer back to any other
3881                   ;; articles, so they're roots.
3882                   (setq threads (append (cdr (symbol-value refs)) threads))))
3883               gnus-newsgroup-dependencies)))
3884     threads))
3885
3886 ;; Build the thread tree.
3887 (defsubst gnus-dependencies-add-header (header dependencies force-new)
3888   "Enter HEADER into the DEPENDENCIES table if it is not already there.
3889
3890 If FORCE-NEW is not nil, enter HEADER into the DEPENDENCIES table even
3891 if it was already present.
3892
3893 If `gnus-summary-ignore-duplicates' is nil then duplicate Message-IDs
3894 will not be entered in the DEPENDENCIES table.  Otherwise duplicate
3895 Message-IDs will be renamed to a unique Message-ID before being
3896 entered.
3897
3898 Returns HEADER if it was entered in the DEPENDENCIES.  Returns nil otherwise."
3899   (let* ((id (mail-header-id header))
3900          (id-dep (and id (intern id dependencies)))
3901          parent-id ref ref-dep ref-header replaced)
3902     ;; Enter this `header' in the `dependencies' table.
3903     (cond
3904      ((not id-dep)
3905       (setq header nil))
3906      ;; The first two cases do the normal part: enter a new `header'
3907      ;; in the `dependencies' table.
3908      ((not (boundp id-dep))
3909       (set id-dep (list header)))
3910      ((null (car (symbol-value id-dep)))
3911       (setcar (symbol-value id-dep) header))
3912
3913      ;; From here the `header' was already present in the
3914      ;; `dependencies' table.
3915      (force-new
3916       ;; Overrides an existing entry;
3917       ;; just set the header part of the entry.
3918       (setcar (symbol-value id-dep) header)
3919       (setq replaced t))
3920
3921      ;; Renames the existing `header' to a unique Message-ID.
3922      ((not gnus-summary-ignore-duplicates)
3923       ;; An article with this Message-ID has already been seen.
3924       ;; We rename the Message-ID.
3925       (set (setq id-dep (intern (setq id (nnmail-message-id)) dependencies))
3926            (list header))
3927       (mail-header-set-id header id))
3928
3929      ;; The last case ignores an existing entry, except it adds any
3930      ;; additional Xrefs (in case the two articles came from different
3931      ;; servers.
3932      ;; Also sets `header' to `nil' meaning that the `dependencies'
3933      ;; table was *not* modified.
3934      (t
3935       (mail-header-set-xref
3936        (car (symbol-value id-dep))
3937        (concat (or (mail-header-xref (car (symbol-value id-dep)))
3938                    "")
3939                (or (mail-header-xref header) "")))
3940       (setq header nil)))
3941
3942     (when (and header (not replaced))
3943       ;; First check that we are not creating a References loop.
3944       (setq parent-id (gnus-parent-id (mail-header-references header)))
3945       (setq ref parent-id)
3946       (while (and ref
3947                   (setq ref-dep (intern-soft ref dependencies))
3948                   (boundp ref-dep)
3949                   (setq ref-header (car (symbol-value ref-dep))))
3950         (if (string= id ref)
3951             ;; Yuk!  This is a reference loop.  Make the article be a
3952             ;; root article.
3953             (progn
3954               (mail-header-set-references (car (symbol-value id-dep)) "none")
3955               (setq ref nil)
3956               (setq parent-id nil))
3957           (setq ref (gnus-parent-id (mail-header-references ref-header)))))
3958       (setq ref-dep (intern (or parent-id "none") dependencies))
3959       (if (boundp ref-dep)
3960           (setcdr (symbol-value ref-dep)
3961                   (nconc (cdr (symbol-value ref-dep))
3962                          (list (symbol-value id-dep))))
3963         (set ref-dep (list nil (symbol-value id-dep)))))
3964     header))
3965
3966 (defun gnus-extract-message-id-from-in-reply-to (string)
3967   (if (string-match "<[^>]+>" string)
3968       (substring string (match-beginning 0) (match-end 0))
3969     nil))
3970
3971 (defun gnus-build-sparse-threads ()
3972   (let ((headers gnus-newsgroup-headers)
3973         (mail-parse-charset gnus-newsgroup-charset)
3974         (gnus-summary-ignore-duplicates t)
3975         header references generation relations
3976         subject child end new-child date)
3977     ;; First we create an alist of generations/relations, where
3978     ;; generations is how much we trust the relation, and the relation
3979     ;; is parent/child.
3980     (gnus-message 7 "Making sparse threads...")
3981     (save-excursion
3982       (nnheader-set-temp-buffer " *gnus sparse threads*")
3983       (while (setq header (pop headers))
3984         (when (and (setq references (mail-header-references header))
3985                    (not (string= references "")))
3986           (insert references)
3987           (setq child (mail-header-id header)
3988                 subject (mail-header-subject header)
3989                 date (mail-header-date header)
3990                 generation 0)
3991           (while (search-backward ">" nil t)
3992             (setq end (1+ (point)))
3993             (when (search-backward "<" nil t)
3994               (setq new-child (buffer-substring (point) end))
3995               (push (list (incf generation)
3996                           child (setq child new-child)
3997                           subject date)
3998                     relations)))
3999           (when child
4000             (push (list (1+ generation) child nil subject) relations))
4001           (erase-buffer)))
4002       (kill-buffer (current-buffer)))
4003     ;; Sort over trustworthiness.
4004     (mapcar
4005      (lambda (relation)
4006        (when (gnus-dependencies-add-header
4007               (make-full-mail-header
4008                gnus-reffed-article-number
4009                (nth 3 relation) "" (or (nth 4 relation) "")
4010                (nth 1 relation)
4011                (or (nth 2 relation) "") 0 0 "")
4012               gnus-newsgroup-dependencies nil)
4013          (push gnus-reffed-article-number gnus-newsgroup-limit)
4014          (push gnus-reffed-article-number gnus-newsgroup-sparse)
4015          (push (cons gnus-reffed-article-number gnus-sparse-mark)
4016                gnus-newsgroup-reads)
4017          (decf gnus-reffed-article-number)))
4018      (sort relations 'car-less-than-car))
4019     (gnus-message 7 "Making sparse threads...done")))
4020
4021 (defun gnus-build-old-threads ()
4022   ;; Look at all the articles that refer back to old articles, and
4023   ;; fetch the headers for the articles that aren't there.  This will
4024   ;; build complete threads - if the roots haven't been expired by the
4025   ;; server, that is.
4026   (let ((mail-parse-charset gnus-newsgroup-charset)
4027         id heads)
4028     (mapatoms
4029      (lambda (refs)
4030        (when (not (car (symbol-value refs)))
4031          (setq heads (cdr (symbol-value refs)))
4032          (while heads
4033            (if (memq (mail-header-number (caar heads))
4034                      gnus-newsgroup-dormant)
4035                (setq heads (cdr heads))
4036              (setq id (symbol-name refs))
4037              (while (and (setq id (gnus-build-get-header id))
4038                          (not (car (gnus-id-to-thread id)))))
4039              (setq heads nil)))))
4040      gnus-newsgroup-dependencies)))
4041
4042 (defsubst gnus-remove-odd-characters (string)
4043   "Translate STRING into something that doesn't contain weird characters."
4044   (mm-subst-char-in-string
4045    ?\r ?\-
4046    (mm-subst-char-in-string
4047     ?\n ?\- string)))
4048
4049 ;; This function has to be called with point after the article number
4050 ;; on the beginning of the line.
4051 (defsubst gnus-nov-parse-line (number dependencies &optional force-new)
4052   (let ((eol (gnus-point-at-eol))
4053         (buffer (current-buffer))
4054         header references in-reply-to)
4055
4056     ;; overview: [num subject from date id refs chars lines misc]
4057     (unwind-protect
4058         (let (x)
4059           (narrow-to-region (point) eol)
4060           (unless (eobp)
4061             (forward-char))
4062
4063           (setq header
4064                 (make-full-mail-header
4065                  number                 ; number
4066                  (condition-case ()     ; subject
4067                      (gnus-remove-odd-characters
4068                       (funcall gnus-decode-encoded-word-function
4069                                (setq x (nnheader-nov-field))))
4070                    (error x))
4071                  (condition-case ()     ; from
4072                      (gnus-remove-odd-characters
4073                       (funcall gnus-decode-encoded-word-function
4074                                (setq x (nnheader-nov-field))))
4075                    (error x))
4076                  (nnheader-nov-field)   ; date
4077                  (nnheader-nov-read-message-id) ; id
4078                  (setq references (nnheader-nov-field)) ; refs
4079                  (nnheader-nov-read-integer) ; chars
4080                  (nnheader-nov-read-integer) ; lines
4081                  (unless (eobp)
4082                    (if (looking-at "Xref: ")
4083                        (goto-char (match-end 0)))
4084                    (nnheader-nov-field)) ; Xref
4085                  (nnheader-nov-parse-extra)))) ; extra
4086
4087       (widen))
4088
4089     (when (and (string= references "")
4090                (setq in-reply-to (mail-header-extra header))
4091                (setq in-reply-to (cdr (assq 'In-Reply-To in-reply-to))))
4092       (mail-header-set-references
4093        header (gnus-extract-message-id-from-in-reply-to in-reply-to)))
4094
4095     (when gnus-alter-header-function
4096       (funcall gnus-alter-header-function header))
4097     (gnus-dependencies-add-header header dependencies force-new)))
4098
4099 (defun gnus-build-get-header (id)
4100   "Look through the buffer of NOV lines and find the header to ID.
4101 Enter this line into the dependencies hash table, and return
4102 the id of the parent article (if any)."
4103   (let ((deps gnus-newsgroup-dependencies)
4104         found header)
4105     (prog1
4106         (save-excursion
4107           (set-buffer nntp-server-buffer)
4108           (let ((case-fold-search nil))
4109             (goto-char (point-min))
4110             (while (and (not found)
4111                         (search-forward id nil t))
4112               (beginning-of-line)
4113               (setq found (looking-at
4114                            (format "^[^\t]*\t[^\t]*\t[^\t]*\t[^\t]*\t%s"
4115                                    (regexp-quote id))))
4116               (or found (beginning-of-line 2)))
4117             (when found
4118               (beginning-of-line)
4119               (and
4120                (setq header (gnus-nov-parse-line
4121                              (read (current-buffer)) deps))
4122                (gnus-parent-id (mail-header-references header))))))
4123       (when header
4124         (let ((number (mail-header-number header)))
4125           (push number gnus-newsgroup-limit)
4126           (push header gnus-newsgroup-headers)
4127           (if (memq number gnus-newsgroup-unselected)
4128               (progn
4129                 (setq gnus-newsgroup-unreads
4130                       (gnus-add-to-sorted-list gnus-newsgroup-unreads
4131                                                number))
4132                 (setq gnus-newsgroup-unselected
4133                       (delq number gnus-newsgroup-unselected)))
4134             (push number gnus-newsgroup-ancient)))))))
4135
4136 (defun gnus-build-all-threads ()
4137   "Read all the headers."
4138   (let ((gnus-summary-ignore-duplicates t)
4139         (mail-parse-charset gnus-newsgroup-charset)
4140         (dependencies gnus-newsgroup-dependencies)
4141         header article)
4142     (save-excursion
4143       (set-buffer nntp-server-buffer)
4144       (let ((case-fold-search nil))
4145         (goto-char (point-min))
4146         (while (not (eobp))
4147           (ignore-errors
4148             (setq article (read (current-buffer))
4149                   header (gnus-nov-parse-line article dependencies)))
4150           (when header
4151             (save-excursion
4152               (set-buffer gnus-summary-buffer)
4153               (push header gnus-newsgroup-headers)
4154               (if (memq (setq article (mail-header-number header))
4155                         gnus-newsgroup-unselected)
4156                   (progn
4157                     (setq gnus-newsgroup-unreads
4158                           (gnus-add-to-sorted-list
4159                            gnus-newsgroup-unreads article))
4160                     (setq gnus-newsgroup-unselected
4161                           (delq article gnus-newsgroup-unselected)))
4162                 (push article gnus-newsgroup-ancient)))
4163             (forward-line 1)))))))
4164
4165 (defun gnus-summary-update-article-line (article header)
4166   "Update the line for ARTICLE using HEADER."
4167   (let* ((id (mail-header-id header))
4168          (thread (gnus-id-to-thread id)))
4169     (unless thread
4170       (error "Article in no thread"))
4171     ;; Update the thread.
4172     (setcar thread header)
4173     (gnus-summary-goto-subject article)
4174     (let* ((datal (gnus-data-find-list article))
4175            (data (car datal))
4176            (buffer-read-only nil)
4177            (level (gnus-summary-thread-level)))
4178       (gnus-delete-line)
4179       (let ((inserted (- (point)
4180                          (progn
4181                            (gnus-summary-insert-line
4182                             header level nil
4183                             (memq article gnus-newsgroup-undownloaded)
4184                             (gnus-article-mark article)
4185                             (memq article gnus-newsgroup-replied)
4186                             (memq article gnus-newsgroup-expirable)
4187                             ;; Only insert the Subject string when it's different
4188                             ;; from the previous Subject string.
4189                             (if (and
4190                                  gnus-show-threads
4191                                  (gnus-subject-equal
4192                                   (condition-case ()
4193                                       (mail-header-subject
4194                                        (gnus-data-header
4195                                         (cadr
4196                                          (gnus-data-find-list
4197                                           article
4198                                           (gnus-data-list t)))))
4199                                     ;; Error on the side of excessive subjects.
4200                                     (error ""))
4201                                   (mail-header-subject header)))
4202                                 ""
4203                               (mail-header-subject header))
4204                             nil (cdr (assq article gnus-newsgroup-scored))
4205                             (memq article gnus-newsgroup-processable))
4206                            (point)))))
4207         (when (cdr datal)
4208           (gnus-data-update-list
4209            (cdr datal)
4210            (- (gnus-data-pos data) (gnus-data-pos (cadr datal)) inserted)))))))
4211
4212 (defun gnus-summary-update-article (article &optional iheader)
4213   "Update ARTICLE in the summary buffer."
4214   (set-buffer gnus-summary-buffer)
4215   (let* ((header (gnus-summary-article-header article))
4216          (id (mail-header-id header))
4217          (data (gnus-data-find article))
4218          (thread (gnus-id-to-thread id))
4219          (references (mail-header-references header))
4220          (parent
4221           (gnus-id-to-thread
4222            (or (gnus-parent-id
4223                 (when (and references
4224                            (not (equal "" references)))
4225                   references))
4226                "none")))
4227          (buffer-read-only nil)
4228          (old (car thread)))
4229     (when thread
4230       (unless iheader
4231         (setcar thread nil)
4232         (when parent
4233           (delq thread parent)))
4234       (if (gnus-summary-insert-subject id header)
4235           ;; Set the (possibly) new article number in the data structure.
4236           (gnus-data-set-number data (gnus-id-to-article id))
4237         (setcar thread old)
4238         nil))))
4239
4240 (defun gnus-rebuild-thread (id &optional line)
4241   "Rebuild the thread containing ID.
4242 If LINE, insert the rebuilt thread starting on line LINE."
4243   (let ((buffer-read-only nil)
4244         old-pos current thread data)
4245     (if (not gnus-show-threads)
4246         (setq thread (list (car (gnus-id-to-thread id))))
4247       ;; Get the thread this article is part of.
4248       (setq thread (gnus-remove-thread id)))
4249     (setq old-pos (gnus-point-at-bol))
4250     (setq current (save-excursion
4251                     (and (re-search-backward "[\r\n]" nil t)
4252                          (gnus-summary-article-number))))
4253     ;; If this is a gathered thread, we have to go some re-gathering.
4254     (when (stringp (car thread))
4255       (let ((subject (car thread))
4256             roots thr)
4257         (setq thread (cdr thread))
4258         (while thread
4259           (unless (memq (setq thr (gnus-id-to-thread
4260                                    (gnus-root-id
4261                                     (mail-header-id (caar thread)))))
4262                         roots)
4263             (push thr roots))
4264           (setq thread (cdr thread)))
4265         ;; We now have all (unique) roots.
4266         (if (= (length roots) 1)
4267             ;; All the loose roots are now one solid root.
4268             (setq thread (car roots))
4269           (setq thread (cons subject (gnus-sort-threads roots))))))
4270     (let (threads)
4271       ;; We then insert this thread into the summary buffer.
4272       (when line
4273         (goto-char (point-min))
4274         (forward-line (1- line)))
4275       (let (gnus-newsgroup-data gnus-newsgroup-threads)
4276         (if gnus-show-threads
4277             (gnus-summary-prepare-threads (gnus-cut-threads (list thread)))
4278           (gnus-summary-prepare-unthreaded thread))
4279         (setq data (nreverse gnus-newsgroup-data))
4280         (setq threads gnus-newsgroup-threads))
4281       ;; We splice the new data into the data structure.
4282       ;;!!! This is kinda bogus.  We assume that in LINE is non-nil,
4283       ;;!!! then we want to insert at the beginning of the buffer.
4284       ;;!!! That happens to be true with Gnus now, but that may
4285       ;;!!! change in the future.  Perhaps.
4286       (gnus-data-enter-list
4287        (if line nil current) data (- (point) old-pos))
4288       (setq gnus-newsgroup-threads
4289             (nconc threads gnus-newsgroup-threads))
4290       (gnus-data-compute-positions))))
4291
4292 (defun gnus-number-to-header (number)
4293   "Return the header for article NUMBER."
4294   (let ((headers gnus-newsgroup-headers))
4295     (while (and headers
4296                 (not (= number (mail-header-number (car headers)))))
4297       (pop headers))
4298     (when headers
4299       (car headers))))
4300
4301 (defun gnus-parent-headers (in-headers &optional generation)
4302   "Return the headers of the GENERATIONeth parent of HEADERS."
4303   (unless generation
4304     (setq generation 1))
4305   (let ((parent t)
4306         (headers in-headers)
4307         references)
4308     (while (and parent
4309                 (not (zerop generation))
4310                 (setq references (mail-header-references headers)))
4311       (setq headers (if (and references
4312                              (setq parent (gnus-parent-id references)))
4313                         (car (gnus-id-to-thread parent))
4314                       nil))
4315       (decf generation))
4316     (and (not (eq headers in-headers))
4317          headers)))
4318
4319 (defun gnus-id-to-thread (id)
4320   "Return the (sub-)thread where ID appears."
4321   (gnus-gethash id gnus-newsgroup-dependencies))
4322
4323 (defun gnus-id-to-article (id)
4324   "Return the article number of ID."
4325   (let ((thread (gnus-id-to-thread id)))
4326     (when (and thread
4327                (car thread))
4328       (mail-header-number (car thread)))))
4329
4330 (defun gnus-id-to-header (id)
4331   "Return the article headers of ID."
4332   (car (gnus-id-to-thread id)))
4333
4334 (defun gnus-article-displayed-root-p (article)
4335   "Say whether ARTICLE is a root(ish) article."
4336   (let ((level (gnus-summary-thread-level article))
4337         (refs (mail-header-references  (gnus-summary-article-header article)))
4338         particle)
4339     (cond
4340      ((null level) nil)
4341      ((zerop level) t)
4342      ((null refs) t)
4343      ((null (gnus-parent-id refs)) t)
4344      ((and (= 1 level)
4345            (null (setq particle (gnus-id-to-article
4346                                  (gnus-parent-id refs))))
4347            (null (gnus-summary-thread-level particle)))))))
4348
4349 (defun gnus-root-id (id)
4350   "Return the id of the root of the thread where ID appears."
4351   (let (last-id prev)
4352     (while (and id (setq prev (car (gnus-id-to-thread id))))
4353       (setq last-id id
4354             id (gnus-parent-id (mail-header-references prev))))
4355     last-id))
4356
4357 (defun gnus-articles-in-thread (thread)
4358   "Return the list of articles in THREAD."
4359   (cons (mail-header-number (car thread))
4360         (apply 'nconc (mapcar 'gnus-articles-in-thread (cdr thread)))))
4361
4362 (defun gnus-remove-thread (id &optional dont-remove)
4363   "Remove the thread that has ID in it."
4364   (let (headers thread last-id)
4365     ;; First go up in this thread until we find the root.
4366     (setq last-id (gnus-root-id id)
4367           headers (message-flatten-list (gnus-id-to-thread last-id)))
4368     ;; We have now found the real root of this thread.  It might have
4369     ;; been gathered into some loose thread, so we have to search
4370     ;; through the threads to find the thread we wanted.
4371     (let ((threads gnus-newsgroup-threads)
4372           sub)
4373       (while threads
4374         (setq sub (car threads))
4375         (if (stringp (car sub))
4376             ;; This is a gathered thread, so we look at the roots
4377             ;; below it to find whether this article is in this
4378             ;; gathered root.
4379             (progn
4380               (setq sub (cdr sub))
4381               (while sub
4382                 (when (member (caar sub) headers)
4383                   (setq thread (car threads)
4384                         threads nil
4385                         sub nil))
4386                 (setq sub (cdr sub))))
4387           ;; It's an ordinary thread, so we check it.
4388           (when (eq (car sub) (car headers))
4389             (setq thread sub
4390                   threads nil)))
4391         (setq threads (cdr threads)))
4392       ;; If this article is in no thread, then it's a root.
4393       (if thread
4394           (unless dont-remove
4395             (setq gnus-newsgroup-threads (delq thread gnus-newsgroup-threads)))
4396         (setq thread (gnus-id-to-thread last-id)))
4397       (when thread
4398         (prog1
4399             thread                      ; We return this thread.
4400           (unless dont-remove
4401             (if (stringp (car thread))
4402                 (progn
4403                   ;; If we use dummy roots, then we have to remove the
4404                   ;; dummy root as well.
4405                   (when (eq gnus-summary-make-false-root 'dummy)
4406                     ;; We go to the dummy root by going to
4407                     ;; the first sub-"thread", and then one line up.
4408                     (gnus-summary-goto-article
4409                      (mail-header-number (caadr thread)))
4410                     (forward-line -1)
4411                     (gnus-delete-line)
4412                     (gnus-data-compute-positions))
4413                   (setq thread (cdr thread))
4414                   (while thread
4415                     (gnus-remove-thread-1 (car thread))
4416                     (setq thread (cdr thread))))
4417               (gnus-remove-thread-1 thread))))))))
4418
4419 (defun gnus-remove-thread-1 (thread)
4420   "Remove the thread THREAD recursively."
4421   (let ((number (mail-header-number (pop thread)))
4422         d)
4423     (setq thread (reverse thread))
4424     (while thread
4425       (gnus-remove-thread-1 (pop thread)))
4426     (when (setq d (gnus-data-find number))
4427       (goto-char (gnus-data-pos d))
4428       (gnus-summary-show-thread)
4429       (gnus-data-remove
4430        number
4431        (- (gnus-point-at-bol)
4432           (prog1
4433               (1+ (gnus-point-at-eol))
4434             (gnus-delete-line)))))))
4435
4436 (defun gnus-sort-threads-1 (threads func)
4437   (sort (mapcar (lambda (thread)
4438                   (cons (car thread)
4439                         (and (cdr thread)
4440                              (gnus-sort-threads-1 (cdr thread) func))))
4441                 threads) func))
4442
4443 (defun gnus-sort-threads (threads)
4444   "Sort THREADS."
4445   (if (not gnus-thread-sort-functions)
4446       threads
4447     (gnus-message 8 "Sorting threads...")
4448     (let ((max-lisp-eval-depth 5000))
4449       (prog1 (gnus-sort-threads-1
4450          threads
4451          (gnus-make-sort-function gnus-thread-sort-functions))
4452         (gnus-message 8 "Sorting threads...done")))))
4453
4454 (defun gnus-sort-articles (articles)
4455   "Sort ARTICLES."
4456   (when gnus-article-sort-functions
4457     (gnus-message 7 "Sorting articles...")
4458     (prog1
4459         (setq gnus-newsgroup-headers
4460               (sort articles (gnus-make-sort-function
4461                               gnus-article-sort-functions)))
4462       (gnus-message 7 "Sorting articles...done"))))
4463
4464 ;; Written by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>.
4465 (defmacro gnus-thread-header (thread)
4466   "Return header of first article in THREAD.
4467 Note that THREAD must never, ever be anything else than a variable -
4468 using some other form will lead to serious barfage."
4469   (or (symbolp thread) (signal 'wrong-type-argument '(symbolp thread)))
4470   ;; (8% speedup to gnus-summary-prepare, just for fun :-)
4471   (list 'byte-code "\10\211:\203\17\0\211@;\203\16\0A@@\207"
4472         (vector thread) 2))
4473
4474 (defsubst gnus-article-sort-by-number (h1 h2)
4475   "Sort articles by article number."
4476   (< (mail-header-number h1)
4477      (mail-header-number h2)))
4478
4479 (defun gnus-thread-sort-by-number (h1 h2)
4480   "Sort threads by root article number."
4481   (gnus-article-sort-by-number
4482    (gnus-thread-header h1) (gnus-thread-header h2)))
4483
4484 (defsubst gnus-article-sort-by-random (h1 h2)
4485   "Sort articles by article number."
4486   (zerop (random 2)))
4487
4488 (defun gnus-thread-sort-by-random (h1 h2)
4489   "Sort threads by root article number."
4490   (gnus-article-sort-by-random
4491    (gnus-thread-header h1) (gnus-thread-header h2)))
4492
4493 (defsubst gnus-article-sort-by-lines (h1 h2)
4494   "Sort articles by article Lines header."
4495   (< (mail-header-lines h1)
4496      (mail-header-lines h2)))
4497
4498 (defun gnus-thread-sort-by-lines (h1 h2)
4499   "Sort threads by root article Lines header."
4500   (gnus-article-sort-by-lines
4501    (gnus-thread-header h1) (gnus-thread-header h2)))
4502
4503 (defsubst gnus-article-sort-by-chars (h1 h2)
4504   "Sort articles by octet length."
4505   (< (mail-header-chars h1)
4506      (mail-header-chars h2)))
4507
4508 (defun gnus-thread-sort-by-chars (h1 h2)
4509   "Sort threads by root article octet length."
4510   (gnus-article-sort-by-chars
4511    (gnus-thread-header h1) (gnus-thread-header h2)))
4512
4513 (defsubst gnus-article-sort-by-author (h1 h2)
4514   "Sort articles by root author."
4515   (string-lessp
4516    (let ((extract (funcall
4517                    gnus-extract-address-components
4518                    (mail-header-from h1))))
4519      (or (car extract) (cadr extract) ""))
4520    (let ((extract (funcall
4521                    gnus-extract-address-components
4522                    (mail-header-from h2))))
4523      (or (car extract) (cadr extract) ""))))
4524
4525 (defun gnus-thread-sort-by-author (h1 h2)
4526   "Sort threads by root author."
4527   (gnus-article-sort-by-author
4528    (gnus-thread-header h1)  (gnus-thread-header h2)))
4529
4530 (defsubst gnus-article-sort-by-subject (h1 h2)
4531   "Sort articles by root subject."
4532   (string-lessp
4533    (downcase (gnus-simplify-subject-re (mail-header-subject h1)))
4534    (downcase (gnus-simplify-subject-re (mail-header-subject h2)))))
4535
4536 (defun gnus-thread-sort-by-subject (h1 h2)
4537   "Sort threads by root subject."
4538   (gnus-article-sort-by-subject
4539    (gnus-thread-header h1) (gnus-thread-header h2)))
4540
4541 (defsubst gnus-article-sort-by-date (h1 h2)
4542   "Sort articles by root article date."
4543   (time-less-p
4544    (gnus-date-get-time (mail-header-date h1))
4545    (gnus-date-get-time (mail-header-date h2))))
4546
4547 (defun gnus-thread-sort-by-date (h1 h2)
4548   "Sort threads by root article date."
4549   (gnus-article-sort-by-date
4550    (gnus-thread-header h1) (gnus-thread-header h2)))
4551
4552 (defsubst gnus-article-sort-by-score (h1 h2)
4553   "Sort articles by root article score.
4554 Unscored articles will be counted as having a score of zero."
4555   (> (or (cdr (assq (mail-header-number h1)
4556                     gnus-newsgroup-scored))
4557          gnus-summary-default-score 0)
4558      (or (cdr (assq (mail-header-number h2)
4559                     gnus-newsgroup-scored))
4560          gnus-summary-default-score 0)))
4561
4562 (defun gnus-thread-sort-by-score (h1 h2)
4563   "Sort threads by root article score."
4564   (gnus-article-sort-by-score
4565    (gnus-thread-header h1) (gnus-thread-header h2)))
4566
4567 (defun gnus-thread-sort-by-total-score (h1 h2)
4568   "Sort threads by the sum of all scores in the thread.
4569 Unscored articles will be counted as having a score of zero."
4570   (> (gnus-thread-total-score h1) (gnus-thread-total-score h2)))
4571
4572 (defun gnus-thread-total-score (thread)
4573   ;; This function find the total score of THREAD.
4574   (cond
4575    ((null thread)
4576     0)
4577    ((consp thread)
4578     (if (stringp (car thread))
4579         (apply gnus-thread-score-function 0
4580                (mapcar 'gnus-thread-total-score-1 (cdr thread)))
4581       (gnus-thread-total-score-1 thread)))
4582    (t
4583     (gnus-thread-total-score-1 (list thread)))))
4584
4585 (defun gnus-thread-sort-by-most-recent-number (h1 h2)
4586   "Sort threads such that the thread with the most recently arrived article comes first."
4587   (> (gnus-thread-highest-number h1) (gnus-thread-highest-number h2)))
4588
4589 (defun gnus-thread-highest-number (thread)
4590   "Return the highest article number in THREAD."
4591   (apply 'max (mapcar (lambda (header)
4592                         (mail-header-number header))
4593                       (message-flatten-list thread))))
4594
4595 (defun gnus-thread-sort-by-most-recent-date (h1 h2)
4596   "Sort threads such that the thread with the most recently dated article comes first."
4597   (> (gnus-thread-latest-date h1) (gnus-thread-latest-date h2)))
4598
4599 (defun gnus-thread-latest-date (thread)
4600   "Return the highest article date in THREAD."
4601   (let ((previous-time 0))
4602     (apply 'max
4603            (mapcar
4604             (lambda (header)
4605               (setq previous-time
4606                     (condition-case ()
4607                         (time-to-seconds (mail-header-parse-date
4608                                           (mail-header-date header)))
4609                       (error previous-time))))
4610             (sort
4611              (message-flatten-list thread)
4612              (lambda (h1 h2)
4613                (< (mail-header-number h1)
4614                   (mail-header-number h2))))))))
4615
4616 (defun gnus-thread-total-score-1 (root)
4617   ;; This function find the total score of the thread below ROOT.
4618   (setq root (car root))
4619   (apply gnus-thread-score-function
4620          (or (append
4621               (mapcar 'gnus-thread-total-score
4622                       (cdr (gnus-id-to-thread (mail-header-id root))))
4623               (when (> (mail-header-number root) 0)
4624                 (list (or (cdr (assq (mail-header-number root)
4625                                      gnus-newsgroup-scored))
4626                           gnus-summary-default-score 0))))
4627              (list gnus-summary-default-score)
4628              '(0))))
4629
4630 ;; Added by Per Abrahamsen <amanda@iesd.auc.dk>.
4631 (defvar gnus-tmp-prev-subject nil)
4632 (defvar gnus-tmp-false-parent nil)
4633 (defvar gnus-tmp-root-expunged nil)
4634 (defvar gnus-tmp-dummy-line nil)
4635
4636 (eval-when-compile (defvar gnus-tmp-header))
4637 (defun gnus-extra-header (type &optional header)
4638   "Return the extra header of TYPE."
4639   (or (cdr (assq type (mail-header-extra (or header gnus-tmp-header))))
4640       ""))
4641
4642 (defvar gnus-tmp-thread-tree-header-string "")
4643
4644 (defcustom gnus-sum-thread-tree-root "> "
4645   "With %B spec, used for the root of a thread.
4646 If nil, use subject instead."
4647   :version "22.1"
4648   :type '(radio (const :format "%v  " nil) string)
4649   :group 'gnus-thread)
4650 (defcustom gnus-sum-thread-tree-false-root "> "
4651   "With %B spec, used for a false root of a thread.
4652 If nil, use subject instead."
4653   :version "22.1"
4654   :type '(radio (const :format "%v  " nil) string)
4655   :group 'gnus-thread)
4656 (defcustom gnus-sum-thread-tree-single-indent ""
4657   "With %B spec, used for a thread with just one message.
4658 If nil, use subject instead."
4659   :version "22.1"
4660   :type '(radio (const :format "%v  " nil) string)
4661   :group 'gnus-thread)
4662 (defcustom gnus-sum-thread-tree-vertical "| "
4663   "With %B spec, used for drawing a vertical line."
4664   :version "22.1"
4665   :type 'string
4666   :group 'gnus-thread)
4667 (defcustom gnus-sum-thread-tree-indent "  "
4668   "With %B spec, used for indenting."
4669   :version "22.1"
4670   :type 'string
4671   :group 'gnus-thread)
4672 (defcustom gnus-sum-thread-tree-leaf-with-other "+-> "
4673   "With %B spec, used for a leaf with brothers."
4674   :version "22.1"
4675   :type 'string
4676   :group 'gnus-thread)
4677 (defcustom gnus-sum-thread-tree-single-leaf "\\-> "
4678   "With %B spec, used for a leaf without brothers."
4679   :version "22.1"
4680   :type 'string
4681   :group 'gnus-thread)
4682
4683 (defun gnus-summary-prepare-threads (threads)
4684   "Prepare summary buffer from THREADS and indentation LEVEL.
4685 THREADS is either a list of `(PARENT [(CHILD1 [(GRANDCHILD ...]...) ...])'
4686 or a straight list of headers."
4687   (gnus-message 7 "Generating summary...")
4688
4689   (setq gnus-newsgroup-threads threads)
4690   (beginning-of-line)
4691
4692   (let ((gnus-tmp-level 0)
4693         (default-score (or gnus-summary-default-score 0))
4694         (gnus-visual-p (gnus-visual-p 'summary-highlight 'highlight))
4695         (building-line-count gnus-summary-display-while-building)
4696         (building-count (integerp gnus-summary-display-while-building))
4697         thread number subject stack state gnus-tmp-gathered beg-match
4698         new-roots gnus-tmp-new-adopts thread-end simp-subject
4699         gnus-tmp-header gnus-tmp-unread gnus-tmp-downloaded
4700         gnus-tmp-replied gnus-tmp-subject-or-nil
4701         gnus-tmp-dummy gnus-tmp-indentation gnus-tmp-lines gnus-tmp-score
4702         gnus-tmp-score-char gnus-tmp-from gnus-tmp-name
4703         gnus-tmp-number gnus-tmp-opening-bracket gnus-tmp-closing-bracket
4704         tree-stack)
4705
4706     (setq gnus-tmp-prev-subject nil
4707           gnus-tmp-thread-tree-header-string "")
4708
4709     (if (vectorp (car threads))
4710         ;; If this is a straight (sic) list of headers, then a
4711         ;; threaded summary display isn't required, so we just create
4712         ;; an unthreaded one.
4713         (gnus-summary-prepare-unthreaded threads)
4714
4715       ;; Do the threaded display.
4716
4717       (if gnus-summary-display-while-building
4718           (switch-to-buffer (buffer-name)))
4719       (while (or threads stack gnus-tmp-new-adopts new-roots)
4720
4721         (if (and (= gnus-tmp-level 0)
4722                  (or (not stack)
4723                      (= (caar stack) 0))
4724                  (not gnus-tmp-false-parent)
4725                  (or gnus-tmp-new-adopts new-roots))
4726             (if gnus-tmp-new-adopts
4727                 (setq gnus-tmp-level (if gnus-tmp-root-expunged 0 1)
4728                       thread (list (car gnus-tmp-new-adopts))
4729                       gnus-tmp-header (caar thread)
4730                       gnus-tmp-new-adopts (cdr gnus-tmp-new-adopts))
4731               (when new-roots
4732                 (setq thread (list (car new-roots))
4733                       gnus-tmp-header (caar thread)
4734                       new-roots (cdr new-roots))))
4735
4736           (if threads
4737               ;; If there are some threads, we do them before the
4738               ;; threads on the stack.
4739               (setq thread threads
4740                     gnus-tmp-header (caar thread))
4741             ;; There were no current threads, so we pop something off
4742             ;; the stack.
4743             (setq state (car stack)
4744                   gnus-tmp-level (car state)
4745                   tree-stack (cadr state)
4746                   thread (caddr state)
4747                   stack (cdr stack)
4748                   gnus-tmp-header (caar thread))))
4749
4750         (setq gnus-tmp-false-parent nil)
4751         (setq gnus-tmp-root-expunged nil)
4752         (setq thread-end nil)
4753
4754         (if (stringp gnus-tmp-header)
4755             ;; The header is a dummy root.
4756             (cond
4757              ((eq gnus-summary-make-false-root 'adopt)
4758               ;; We let the first article adopt the rest.
4759               (setq gnus-tmp-new-adopts (nconc gnus-tmp-new-adopts
4760                                                (cddar thread)))
4761               (setq gnus-tmp-gathered
4762                     (nconc (mapcar
4763                             (lambda (h) (mail-header-number (car h)))
4764                             (cddar thread))
4765                            gnus-tmp-gathered))
4766               (setq thread (cons (list (caar thread)
4767                                        (cadar thread))
4768                                  (cdr thread)))
4769               (setq gnus-tmp-level -1
4770                     gnus-tmp-false-parent t))
4771              ((eq gnus-summary-make-false-root 'empty)
4772               ;; We print adopted articles with empty subject fields.
4773               (setq gnus-tmp-gathered
4774                     (nconc (mapcar
4775                             (lambda (h) (mail-header-number (car h)))
4776                             (cddar thread))
4777                            gnus-tmp-gathered))
4778               (setq gnus-tmp-level -1))
4779              ((eq gnus-summary-make-false-root 'dummy)
4780               ;; We remember that we probably want to output a dummy
4781               ;; root.
4782               (setq gnus-tmp-dummy-line gnus-tmp-header)
4783               (setq gnus-tmp-prev-subject gnus-tmp-header))
4784              (t
4785               ;; We do not make a root for the gathered
4786               ;; sub-threads at all.
4787               (setq gnus-tmp-level -1)))
4788
4789           (setq number (mail-header-number gnus-tmp-header)
4790                 subject (mail-header-subject gnus-tmp-header)
4791                 simp-subject (gnus-simplify-subject-fully subject))
4792
4793           (cond
4794            ;; If the thread has changed subject, we might want to make
4795            ;; this subthread into a root.
4796            ((and (null gnus-thread-ignore-subject)
4797                  (not (zerop gnus-tmp-level))
4798                  gnus-tmp-prev-subject
4799                  (not (string= gnus-tmp-prev-subject simp-subject)))
4800             (setq new-roots (nconc new-roots (list (car thread)))
4801                   thread-end t
4802                   gnus-tmp-header nil))
4803            ;; If the article lies outside the current limit,
4804            ;; then we do not display it.
4805            ((not (memq number gnus-newsgroup-limit))
4806             (setq gnus-tmp-gathered
4807                   (nconc (mapcar
4808                           (lambda (h) (mail-header-number (car h)))
4809                           (cdar thread))
4810                          gnus-tmp-gathered))
4811             (setq gnus-tmp-new-adopts (if (cdar thread)
4812                                           (append gnus-tmp-new-adopts
4813                                                   (cdar thread))
4814                                         gnus-tmp-new-adopts)
4815                   thread-end t
4816                   gnus-tmp-header nil)
4817             (when (zerop gnus-tmp-level)
4818               (setq gnus-tmp-root-expunged t)))
4819            ;; Perhaps this article is to be marked as read?
4820            ((and gnus-summary-mark-below
4821                  (< (or (cdr (assq number gnus-newsgroup-scored))
4822                         default-score)
4823                     gnus-summary-mark-below)
4824                  ;; Don't touch sparse articles.
4825                  (not (gnus-summary-article-sparse-p number))
4826                  (not (gnus-summary-article-ancient-p number)))
4827             (setq gnus-newsgroup-unreads
4828                   (delq number gnus-newsgroup-unreads))
4829             (if gnus-newsgroup-auto-expire
4830                 (setq gnus-newsgroup-expirable
4831                       (gnus-add-to-sorted-list
4832                        gnus-newsgroup-expirable number))
4833               (push (cons number gnus-low-score-mark)
4834                     gnus-newsgroup-reads))))
4835
4836           (when gnus-tmp-header
4837             ;; We may have an old dummy line to output before this
4838             ;; article.
4839             (when (and gnus-tmp-dummy-line
4840                        (gnus-subject-equal
4841                         gnus-tmp-dummy-line
4842                         (mail-header-subject gnus-tmp-header)))
4843               (gnus-summary-insert-dummy-line
4844                gnus-tmp-dummy-line (mail-header-number gnus-tmp-header))
4845               (setq gnus-tmp-dummy-line nil))
4846
4847             ;; Compute the mark.
4848             (setq gnus-tmp-unread (gnus-article-mark number))
4849
4850             (push (gnus-data-make number gnus-tmp-unread (1+ (point))
4851                                   gnus-tmp-header gnus-tmp-level)
4852                   gnus-newsgroup-data)
4853
4854             ;; Actually insert the line.
4855             (setq
4856              gnus-tmp-subject-or-nil
4857              (cond
4858               ((and gnus-thread-ignore-subject
4859                     gnus-tmp-prev-subject
4860                     (not (string= gnus-tmp-prev-subject simp-subject)))
4861                subject)
4862               ((zerop gnus-tmp-level)
4863                (if (and (eq gnus-summary-make-false-root 'empty)
4864                         (memq number gnus-tmp-gathered)
4865                         gnus-tmp-prev-subject
4866                         (string= gnus-tmp-prev-subject simp-subject))
4867                    gnus-summary-same-subject
4868                  subject))
4869               (t gnus-summary-same-subject)))
4870             (if (and (eq gnus-summary-make-false-root 'adopt)
4871                      (= gnus-tmp-level 1)
4872                      (memq number gnus-tmp-gathered))
4873                 (setq gnus-tmp-opening-bracket ?\<
4874                       gnus-tmp-closing-bracket ?\>)
4875               (setq gnus-tmp-opening-bracket ?\[
4876                     gnus-tmp-closing-bracket ?\]))
4877             (setq
4878              gnus-tmp-indentation
4879              (aref gnus-thread-indent-array gnus-tmp-level)
4880              gnus-tmp-lines (mail-header-lines gnus-tmp-header)
4881              gnus-tmp-score (or (cdr (assq number gnus-newsgroup-scored))
4882                                 gnus-summary-default-score 0)
4883              gnus-tmp-score-char
4884              (if (or (null gnus-summary-default-score)
4885                      (<= (abs (- gnus-tmp-score gnus-summary-default-score))
4886                          gnus-summary-zcore-fuzz))
4887                  ?                      ;Whitespace
4888                (if (< gnus-tmp-score gnus-summary-default-score)
4889                    gnus-score-below-mark gnus-score-over-mark))
4890              gnus-tmp-replied
4891              (cond ((memq number gnus-newsgroup-processable)
4892                     gnus-process-mark)
4893                    ((memq number gnus-newsgroup-cached)
4894                     gnus-cached-mark)
4895                    ((memq number gnus-newsgroup-replied)
4896                     gnus-replied-mark)
4897                    ((memq number gnus-newsgroup-forwarded)
4898                     gnus-forwarded-mark)
4899                    ((memq number gnus-newsgroup-saved)
4900                     gnus-saved-mark)
4901                    ((memq number gnus-newsgroup-recent)
4902                     gnus-recent-mark)
4903                    ((memq number gnus-newsgroup-unseen)
4904                     gnus-unseen-mark)
4905                    (t gnus-no-mark))
4906              gnus-tmp-downloaded
4907              (cond ((memq number gnus-newsgroup-undownloaded)
4908                     gnus-undownloaded-mark)
4909                    (gnus-newsgroup-agentized
4910                     gnus-downloaded-mark)
4911                    (t
4912                     gnus-no-mark))
4913              gnus-tmp-from (mail-header-from gnus-tmp-header)
4914              gnus-tmp-name
4915              (cond
4916               ((string-match "<[^>]+> *$" gnus-tmp-from)
4917                (setq beg-match (match-beginning 0))
4918                (or (and (string-match "^\".+\"" gnus-tmp-from)
4919                         (substring gnus-tmp-from 1 (1- (match-end 0))))
4920                    (substring gnus-tmp-from 0 beg-match)))
4921               ((string-match "(.+)" gnus-tmp-from)
4922                (substring gnus-tmp-from
4923                           (1+ (match-beginning 0)) (1- (match-end 0))))
4924               (t gnus-tmp-from))
4925
4926              ;; Do the %B string
4927              gnus-tmp-thread-tree-header-string
4928              (cond
4929               ((not gnus-show-threads) "")
4930               ((zerop gnus-tmp-level)
4931                (cond ((cdar thread)
4932                       (or gnus-sum-thread-tree-root subject))
4933                      (gnus-tmp-new-adopts
4934                       (or gnus-sum-thread-tree-false-root subject))
4935                      (t
4936                       (or gnus-sum-thread-tree-single-indent subject))))
4937               (t
4938                (concat (apply 'concat
4939                               (mapcar (lambda (item)
4940                                         (if (= item 1)
4941                                             gnus-sum-thread-tree-vertical
4942                                           gnus-sum-thread-tree-indent))
4943                                       (cdr (reverse tree-stack))))
4944                        (if (nth 1 thread)
4945                            gnus-sum-thread-tree-leaf-with-other
4946                          gnus-sum-thread-tree-single-leaf)))))
4947             (when (string= gnus-tmp-name "")
4948               (setq gnus-tmp-name gnus-tmp-from))
4949             (unless (numberp gnus-tmp-lines)
4950               (setq gnus-tmp-lines -1))
4951             (if (= gnus-tmp-lines -1)
4952                 (setq gnus-tmp-lines "?")
4953               (setq gnus-tmp-lines (number-to-string gnus-tmp-lines)))
4954               (gnus-put-text-property
4955              (point)
4956              (progn (eval gnus-summary-line-format-spec) (point))
4957                'gnus-number number)
4958             (when gnus-visual-p
4959               (forward-line -1)
4960               (gnus-run-hooks 'gnus-summary-update-hook)
4961               (forward-line 1))
4962
4963             (setq gnus-tmp-prev-subject simp-subject)))
4964
4965         (when (nth 1 thread)
4966           (push (list (max 0 gnus-tmp-level)
4967                       (copy-sequence tree-stack)
4968                       (nthcdr 1 thread))
4969                 stack))
4970         (push (if (nth 1 thread) 1 0) tree-stack)
4971         (incf gnus-tmp-level)
4972         (setq threads (if thread-end nil (cdar thread)))
4973         (if gnus-summary-display-while-building
4974             (if building-count
4975                 (progn
4976                   ;; use a set frequency
4977                   (setq building-line-count (1- building-line-count))
4978                   (when (= building-line-count 0)
4979                     (sit-for 0)
4980                     (setq building-line-count
4981                           gnus-summary-display-while-building)))
4982               ;; always
4983               (sit-for 0)))
4984         (unless threads
4985           (setq gnus-tmp-level 0)))))
4986   (gnus-message 7 "Generating summary...done"))
4987
4988 (defun gnus-summary-prepare-unthreaded (headers)
4989   "Generate an unthreaded summary buffer based on HEADERS."
4990   (let (header number mark)
4991
4992     (beginning-of-line)
4993
4994     (while headers
4995       ;; We may have to root out some bad articles...
4996       (when (memq (setq number (mail-header-number
4997                                 (setq header (pop headers))))
4998                   gnus-newsgroup-limit)
4999         ;; Mark article as read when it has a low score.
5000         (when (and gnus-summary-mark-below
5001                    (< (or (cdr (assq number gnus-newsgroup-scored))
5002                           gnus-summary-default-score 0)
5003                       gnus-summary-mark-below)
5004                    (not (gnus-summary-article-ancient-p number)))
5005           (setq gnus-newsgroup-unreads
5006                 (delq number gnus-newsgroup-unreads))
5007           (if gnus-newsgroup-auto-expire
5008               (push number gnus-newsgroup-expirable)
5009             (push (cons number gnus-low-score-mark)
5010                   gnus-newsgroup-reads)))
5011
5012         (setq mark (gnus-article-mark number))
5013         (push (gnus-data-make number mark (1+ (point)) header 0)
5014               gnus-newsgroup-data)
5015         (gnus-summary-insert-line
5016          header 0 number
5017          (memq number gnus-newsgroup-undownloaded)
5018          mark (memq number gnus-newsgroup-replied)
5019          (memq number gnus-newsgroup-expirable)
5020          (mail-header-subject header) nil
5021          (cdr (assq number gnus-newsgroup-scored))
5022          (memq number gnus-newsgroup-processable))))))
5023
5024 (defun gnus-summary-remove-list-identifiers ()
5025   "Remove list identifiers in `gnus-list-identifiers' from articles in the current group."
5026   (let ((regexp (if (consp gnus-list-identifiers)
5027                     (mapconcat 'identity gnus-list-identifiers " *\\|")
5028                   gnus-list-identifiers))
5029         changed subject)
5030     (when regexp
5031       (dolist (header gnus-newsgroup-headers)
5032         (setq subject (mail-header-subject header)
5033               changed nil)
5034         (while (string-match
5035                 (concat "^\\(R[Ee]: +\\)*\\(" regexp " *\\)")
5036                 subject)
5037           (setq subject
5038                 (concat (substring subject 0 (match-beginning 2))
5039                         (substring subject (match-end 0)))
5040                 changed t))
5041         (when (and changed
5042                    (string-match
5043                     "^\\(\\(R[Ee]: +\\)+\\)R[Ee]: +" subject))
5044           (setq subject
5045                 (concat (substring subject 0 (match-beginning 1))
5046                         (substring subject (match-end 1)))))
5047         (when changed
5048           (mail-header-set-subject header subject))))))
5049
5050 (defun gnus-fetch-headers (articles)
5051   "Fetch headers of ARTICLES."
5052   (let ((name (gnus-group-decoded-name gnus-newsgroup-name)))
5053     (gnus-message 5 "Fetching headers for %s..." name)
5054     (prog1
5055         (if (eq 'nov
5056                 (setq gnus-headers-retrieved-by
5057                       (gnus-retrieve-headers
5058                        articles gnus-newsgroup-name
5059                        ;; We might want to fetch old headers, but
5060                        ;; not if there is only 1 article.
5061                        (and (or (and
5062                                  (not (eq gnus-fetch-old-headers 'some))
5063                                  (not (numberp gnus-fetch-old-headers)))
5064                                 (> (length articles) 1))
5065                             gnus-fetch-old-headers))))
5066             (gnus-get-newsgroup-headers-xover
5067              articles nil nil gnus-newsgroup-name t)
5068           (gnus-get-newsgroup-headers))
5069       (gnus-message 5 "Fetching headers for %s...done" name))))
5070
5071 (defun gnus-select-newsgroup (group &optional read-all select-articles)
5072   "Select newsgroup GROUP.
5073 If READ-ALL is non-nil, all articles in the group are selected.
5074 If SELECT-ARTICLES, only select those articles from GROUP."
5075   (let* ((entry (gnus-gethash group gnus-newsrc-hashtb))
5076          ;;!!! Dirty hack; should be removed.
5077          (gnus-summary-ignore-duplicates
5078           (if (eq (car (gnus-find-method-for-group group)) 'nnvirtual)
5079               t
5080             gnus-summary-ignore-duplicates))
5081          (info (nth 2 entry))
5082          articles fetched-articles cached)
5083
5084     (unless (gnus-check-server
5085              (set (make-local-variable 'gnus-current-select-method)
5086                   (gnus-find-method-for-group group)))
5087       (error "Couldn't open server"))
5088
5089     (or (and entry (not (eq (car entry) t))) ; Either it's active...
5090         (gnus-activate-group group)     ; Or we can activate it...
5091         (progn                          ; Or we bug out.
5092           (when (equal major-mode 'gnus-summary-mode)
5093             (gnus-kill-buffer (current-buffer)))
5094           (error "Couldn't activate group %s: %s"
5095                  group (gnus-status-message group))))
5096
5097     (unless (gnus-request-group group t)
5098       (when (equal major-mode 'gnus-summary-mode)
5099         (gnus-kill-buffer (current-buffer)))
5100       (error "Couldn't request group %s: %s"
5101              group (gnus-status-message group)))
5102
5103     (when gnus-agent
5104       (gnus-agent-possibly-alter-active group (gnus-active group) info)
5105
5106       (setq gnus-summary-use-undownloaded-faces
5107             (gnus-agent-find-parameter
5108              group
5109              'agent-enable-undownloaded-faces)))
5110
5111     (setq gnus-newsgroup-name group
5112           gnus-newsgroup-unselected nil
5113           gnus-newsgroup-unreads (gnus-list-of-unread-articles group))
5114
5115     (let ((display (gnus-group-find-parameter group 'display)))
5116       (setq gnus-newsgroup-display
5117             (cond
5118              ((not (zerop (or (car-safe read-all) 0)))
5119               ;; The user entered the group with C-u SPC/RET, let's show
5120               ;; all articles.
5121               'gnus-not-ignore)
5122              ((eq display 'all)
5123               'gnus-not-ignore)
5124              ((arrayp display)
5125               (gnus-summary-display-make-predicate (mapcar 'identity display)))
5126              ((numberp display)
5127               ;; The following is probably the "correct" solution, but
5128               ;; it makes Gnus fetch all headers and then limit the
5129               ;; articles (which is slow), so instead we hack the
5130               ;; select-articles parameter instead. -- Simon Josefsson
5131               ;; <jas@kth.se>
5132               ;;
5133               ;; (gnus-byte-compile
5134               ;;  `(lambda () (> number ,(- (cdr (gnus-active group))
5135               ;;                         display)))))
5136               (setq select-articles
5137                     (gnus-uncompress-range
5138                      (cons (let ((tmp (- (cdr (gnus-active group)) display)))
5139                              (if (> tmp 0)
5140                                  tmp
5141                                1))
5142                            (cdr (gnus-active group)))))
5143               nil)
5144              (t
5145               nil))))
5146
5147     (gnus-summary-setup-default-charset)
5148
5149     ;; Kludge to avoid having cached articles nixed out in virtual groups.
5150     (when (gnus-virtual-group-p group)
5151       (setq cached gnus-newsgroup-cached))
5152
5153     (setq gnus-newsgroup-unreads
5154           (gnus-sorted-ndifference
5155            (gnus-sorted-ndifference gnus-newsgroup-unreads
5156                                     gnus-newsgroup-marked)
5157            gnus-newsgroup-dormant))
5158
5159     (setq gnus-newsgroup-processable nil)
5160
5161     (gnus-update-read-articles group gnus-newsgroup-unreads)
5162
5163     ;; Adjust and set lists of article marks.
5164     (when info
5165       (gnus-adjust-marked-articles info))
5166     (if (setq articles select-articles)
5167         (setq gnus-newsgroup-unselected
5168               (gnus-sorted-difference gnus-newsgroup-unreads articles))
5169       (setq articles (gnus-articles-to-read group read-all)))
5170
5171     (cond
5172      ((null articles)
5173       ;;(gnus-message 3 "Couldn't select newsgroup -- no articles to display")
5174       'quit)
5175      ((eq articles 0) nil)
5176      (t
5177       ;; Init the dependencies hash table.
5178       (setq gnus-newsgroup-dependencies
5179             (gnus-make-hashtable (length articles)))
5180       (gnus-set-global-variables)
5181       ;; Retrieve the headers and read them in.
5182
5183       (setq gnus-newsgroup-headers (gnus-fetch-headers articles))
5184
5185       ;; Kludge to avoid having cached articles nixed out in virtual groups.
5186       (when cached
5187         (setq gnus-newsgroup-cached cached))
5188
5189       ;; Suppress duplicates?
5190       (when gnus-suppress-duplicates
5191         (gnus-dup-suppress-articles))
5192
5193       ;; Set the initial limit.
5194       (setq gnus-newsgroup-limit (copy-sequence articles))
5195       ;; Remove canceled articles from the list of unread articles.
5196       (setq fetched-articles
5197             (mapcar (lambda (headers) (mail-header-number headers))
5198                     gnus-newsgroup-headers))
5199       (setq gnus-newsgroup-articles fetched-articles)
5200       (setq gnus-newsgroup-unreads
5201             (gnus-sorted-nintersection
5202              gnus-newsgroup-unreads fetched-articles))
5203       (gnus-compute-unseen-list)
5204
5205       ;; Removed marked articles that do not exist.
5206       (gnus-update-missing-marks
5207        (gnus-sorted-difference articles fetched-articles))
5208       ;; We might want to build some more threads first.
5209       (when (and gnus-fetch-old-headers
5210                  (eq gnus-headers-retrieved-by 'nov))
5211         (if (eq gnus-fetch-old-headers 'invisible)
5212             (gnus-build-all-threads)
5213           (gnus-build-old-threads)))
5214       ;; Let the Gnus agent mark articles as read.
5215       (when gnus-agent
5216         (gnus-agent-get-undownloaded-list))
5217       ;; Remove list identifiers from subject
5218       (when gnus-list-identifiers
5219         (gnus-summary-remove-list-identifiers))
5220       ;; Check whether auto-expire is to be done in this group.
5221       (setq gnus-newsgroup-auto-expire
5222             (gnus-group-auto-expirable-p group))
5223       ;; Set up the article buffer now, if necessary.
5224       (unless gnus-single-article-buffer
5225         (gnus-article-setup-buffer))
5226       ;; First and last article in this newsgroup.
5227       (when gnus-newsgroup-headers
5228         (setq gnus-newsgroup-begin
5229               (mail-header-number (car gnus-newsgroup-headers))
5230               gnus-newsgroup-end
5231               (mail-header-number
5232                (gnus-last-element gnus-newsgroup-headers))))
5233       ;; GROUP is successfully selected.
5234       (or gnus-newsgroup-headers t)))))
5235
5236 (defun gnus-compute-unseen-list ()
5237   ;; The `seen' marks are treated specially.
5238   (if (not gnus-newsgroup-seen)
5239       (setq gnus-newsgroup-unseen gnus-newsgroup-articles)
5240     (setq gnus-newsgroup-unseen
5241           (gnus-inverse-list-range-intersection
5242            gnus-newsgroup-articles gnus-newsgroup-seen))))
5243
5244 (defun gnus-summary-display-make-predicate (display)
5245   (require 'gnus-agent)
5246   (when (= (length display) 1)
5247     (setq display (car display)))
5248   (unless gnus-summary-display-cache
5249     (dolist (elem (append '((unread . unread)
5250                             (read . read)
5251                             (unseen . unseen))
5252                           gnus-article-mark-lists))
5253       (push (cons (cdr elem)
5254                   (gnus-byte-compile
5255                    `(lambda () (gnus-article-marked-p ',(cdr elem)))))
5256             gnus-summary-display-cache)))
5257   (let ((gnus-category-predicate-alist gnus-summary-display-cache)
5258         (gnus-category-predicate-cache gnus-summary-display-cache))
5259     (gnus-get-predicate display)))
5260
5261 ;; Uses the dynamically bound `number' variable.
5262 (eval-when-compile
5263   (defvar number))
5264 (defun gnus-article-marked-p (type &optional article)
5265   (let ((article (or article number)))
5266     (cond
5267      ((eq type 'tick)
5268       (memq article gnus-newsgroup-marked))
5269      ((eq type 'spam)
5270       (memq article gnus-newsgroup-spam-marked))
5271      ((eq type 'unsend)
5272       (memq article gnus-newsgroup-unsendable))
5273      ((eq type 'undownload)
5274       (memq article gnus-newsgroup-undownloaded))
5275      ((eq type 'download)
5276       (memq article gnus-newsgroup-downloadable))
5277      ((eq type 'unread)
5278       (memq article gnus-newsgroup-unreads))
5279      ((eq type 'read)
5280       (memq article gnus-newsgroup-reads))
5281      ((eq type 'dormant)
5282       (memq article gnus-newsgroup-dormant) )
5283      ((eq type 'expire)
5284       (memq article gnus-newsgroup-expirable))
5285      ((eq type 'reply)
5286       (memq article gnus-newsgroup-replied))
5287      ((eq type 'killed)
5288       (memq article gnus-newsgroup-killed))
5289      ((eq type 'bookmark)
5290       (assq article gnus-newsgroup-bookmarks))
5291      ((eq type 'score)
5292       (assq article gnus-newsgroup-scored))
5293      ((eq type 'save)
5294       (memq article gnus-newsgroup-saved))
5295      ((eq type 'cache)
5296       (memq article gnus-newsgroup-cached))
5297      ((eq type 'forward)
5298       (memq article gnus-newsgroup-forwarded))
5299      ((eq type 'seen)
5300       (not (memq article gnus-newsgroup-unseen)))
5301      ((eq type 'recent)
5302       (memq article gnus-newsgroup-recent))
5303      (t t))))
5304
5305 (defun gnus-articles-to-read (group &optional read-all)
5306   "Find out what articles the user wants to read."
5307   (let* ((display (gnus-group-find-parameter group 'display))
5308          (articles
5309           ;; Select all articles if `read-all' is non-nil, or if there
5310           ;; are no unread articles.
5311           (if (or read-all
5312                   (and (zerop (length gnus-newsgroup-marked))
5313                        (zerop (length gnus-newsgroup-unreads)))
5314                   ;; Fetch all if the predicate is non-nil.
5315                   gnus-newsgroup-display)
5316               ;; We want to select the headers for all the articles in
5317               ;; the group, so we select either all the active
5318               ;; articles in the group, or (if that's nil), the
5319               ;; articles in the cache.
5320               (or
5321                (gnus-uncompress-range (gnus-active group))
5322                (gnus-cache-articles-in-group group))
5323             ;; Select only the "normal" subset of articles.
5324             (gnus-sorted-nunion
5325              (gnus-sorted-union gnus-newsgroup-dormant gnus-newsgroup-marked)
5326              gnus-newsgroup-unreads)))
5327          (scored-list (gnus-killed-articles gnus-newsgroup-killed articles))
5328          (scored (length scored-list))
5329          (number (length articles))
5330          (marked (+ (length gnus-newsgroup-marked)
5331                     (length gnus-newsgroup-dormant)))
5332          (select
5333           (cond
5334            ((numberp read-all)
5335             read-all)
5336            ((numberp gnus-newsgroup-display)
5337             gnus-newsgroup-display)
5338            (t
5339             (condition-case ()
5340                 (cond
5341                  ((and (or (<= scored marked) (= scored number))
5342                        (numberp gnus-large-newsgroup)
5343                        (> number gnus-large-newsgroup))
5344                   (let* ((cursor-in-echo-area nil)
5345                          (initial (gnus-parameter-large-newsgroup-initial
5346                                    gnus-newsgroup-name))
5347                          (input
5348                           (read-string
5349                            (format
5350                             "How many articles from %s (%s %d): "
5351                             (gnus-limit-string
5352                              (gnus-group-decoded-name gnus-newsgroup-name)
5353                              35)
5354                             (if initial "max" "default")
5355                             number)
5356                            (if initial
5357                                (cons (number-to-string initial)
5358                                      0)))))
5359                     (if (string-match "^[ \t]*$" input) number input)))
5360                  ((and (> scored marked) (< scored number)
5361                        (> (- scored number) 20))
5362                   (let ((input
5363                          (read-string
5364                           (format "%s %s (%d scored, %d total): "
5365                                   "How many articles from"
5366                                   (gnus-group-decoded-name group)
5367                                   scored number))))
5368                     (if (string-match "^[ \t]*$" input)
5369                         number input)))
5370                  (t number))
5371               (quit
5372                (message "Quit getting the articles to read")
5373                nil))))))
5374     (setq select (if (stringp select) (string-to-number select) select))
5375     (if (or (null select) (zerop select))
5376         select
5377       (if (and (not (zerop scored)) (<= (abs select) scored))
5378           (progn
5379             (setq articles (sort scored-list '<))
5380             (setq number (length articles)))
5381         (setq articles (copy-sequence articles)))
5382
5383       (when (< (abs select) number)
5384         (if (< select 0)
5385             ;; Select the N oldest articles.
5386             (setcdr (nthcdr (1- (abs select)) articles) nil)
5387           ;; Select the N most recent articles.
5388           (setq articles (nthcdr (- number select) articles))))
5389       (setq gnus-newsgroup-unselected
5390             (gnus-sorted-difference gnus-newsgroup-unreads articles))
5391       (when gnus-alter-articles-to-read-function
5392         (setq articles
5393               (sort
5394                (funcall gnus-alter-articles-to-read-function
5395                         gnus-newsgroup-name articles)
5396                '<)))
5397       articles)))
5398
5399 (defun gnus-killed-articles (killed articles)
5400   (let (out)
5401     (while articles
5402       (when (inline (gnus-member-of-range (car articles) killed))
5403         (push (car articles) out))
5404       (setq articles (cdr articles)))
5405     out))
5406
5407 (defun gnus-uncompress-marks (marks)
5408   "Uncompress the mark ranges in MARKS."
5409   (let ((uncompressed '(score bookmark))
5410         out)
5411     (while marks
5412       (if (memq (caar marks) uncompressed)
5413           (push (car marks) out)
5414         (push (cons (caar marks) (gnus-uncompress-range (cdar marks))) out))
5415       (setq marks (cdr marks)))
5416     out))
5417
5418 (defun gnus-article-mark-to-type (mark)
5419   "Return the type of MARK."
5420   (or (cadr (assq mark gnus-article-special-mark-lists))
5421       'list))
5422
5423 (defun gnus-article-unpropagatable-p (mark)
5424   "Return whether MARK should be propagated to back end."
5425   (memq mark gnus-article-unpropagated-mark-lists))
5426
5427 (defun gnus-adjust-marked-articles (info)
5428   "Set all article lists and remove all marks that are no longer valid."
5429   (let* ((marked-lists (gnus-info-marks info))
5430          (active (gnus-active (gnus-info-group info)))
5431          (min (car active))
5432          (max (cdr active))
5433          (types gnus-article-mark-lists)
5434          marks var articles article mark mark-type
5435          bgn end)
5436
5437     (dolist (marks marked-lists)
5438       (setq mark (car marks)
5439             mark-type (gnus-article-mark-to-type mark)
5440             var (intern (format "gnus-newsgroup-%s" (car (rassq mark types)))))
5441
5442       ;; We set the variable according to the type of the marks list,
5443       ;; and then adjust the marks to a subset of the active articles.
5444       (cond
5445        ;; Adjust "simple" lists - compressed yet unsorted
5446        ((eq mark-type 'list)
5447         ;; Simultaneously uncompress and clip to active range
5448         ;; See gnus-uncompress-range for a description of possible marks
5449         (let (l lh)
5450           (if (not (cadr marks))
5451               (set var nil)
5452             (setq articles (if (numberp (cddr marks))
5453                                (list (cdr marks))
5454                              (cdr marks))
5455                   lh (cons nil nil)
5456                   l lh)
5457
5458             (while (setq article (pop articles))
5459               (cond ((consp article)
5460                      (setq bgn (max (car article) min)
5461                            end (min (cdr article) max))
5462                      (while (<= bgn end)
5463                        (setq l (setcdr l (cons bgn nil))
5464                              bgn (1+ bgn))))
5465                     ((and (<= min article)
5466                           (>= max article))
5467                      (setq l (setcdr l (cons article nil))))))
5468             (set var (cdr lh)))))
5469        ;; Adjust assocs.
5470        ((eq mark-type 'tuple)
5471         (set var (setq articles (cdr marks)))
5472         (when (not (listp (cdr (symbol-value var))))
5473           (set var (list (symbol-value var))))
5474         (when (not (listp (cdr articles)))
5475           (setq articles (list articles)))
5476         (while articles
5477           (when (or (not (consp (setq article (pop articles))))
5478                     (< (car article) min)
5479                     (> (car article) max))
5480             (set var (delq article (symbol-value var))))))
5481        ;; Adjust ranges (sloppily).
5482        ((eq mark-type 'range)
5483         (cond
5484          ((eq mark 'seen)
5485           ;; Fix the record for `seen' if it looks like (seen NUM1 . NUM2).
5486           ;; It should be (seen (NUM1 . NUM2)).
5487           (when (numberp (cddr marks))
5488             (setcdr marks (list (cdr marks))))
5489           (setq articles (cdr marks))
5490           (while (and articles
5491                       (or (and (consp (car articles))
5492                                (> min (cdar articles)))
5493                           (and (numberp (car articles))
5494                                (> min (car articles)))))
5495             (pop articles))
5496           (set var articles))))))))
5497
5498 (defun gnus-update-missing-marks (missing)
5499   "Go through the list of MISSING articles and remove them from the mark lists."
5500   (when missing
5501     (let (var m)
5502       ;; Go through all types.
5503       (dolist (elem gnus-article-mark-lists)
5504         (when (eq (gnus-article-mark-to-type (cdr elem)) 'list)
5505           (setq var (intern (format "gnus-newsgroup-%s" (car elem))))
5506           (when (symbol-value var)
5507             ;; This list has articles.  So we delete all missing
5508             ;; articles from it.
5509             (setq m missing)
5510             (while m
5511               (set var (delq (pop m) (symbol-value var))))))))))
5512
5513 (defun gnus-update-marks ()
5514   "Enter the various lists of marked articles into the newsgroup info list."
5515   (let ((types gnus-article-mark-lists)
5516         (info (gnus-get-info gnus-newsgroup-name))
5517         type list newmarked symbol delta-marks)
5518     (when info
5519       ;; Add all marks lists to the list of marks lists.
5520       (while (setq type (pop types))
5521         (setq list (symbol-value
5522                     (setq symbol
5523                           (intern (format "gnus-newsgroup-%s" (car type))))))
5524
5525         (when list
5526           ;; Get rid of the entries of the articles that have the
5527           ;; default score.
5528           (when (and (eq (cdr type) 'score)
5529                      gnus-save-score
5530                      list)
5531             (let* ((arts list)
5532                    (prev (cons nil list))
5533                    (all prev))
5534               (while arts
5535                 (if (or (not (consp (car arts)))
5536                         (= (cdar arts) gnus-summary-default-score))
5537                     (setcdr prev (cdr arts))
5538                   (setq prev arts))
5539                 (setq arts (cdr arts)))
5540               (setq list (cdr all)))))
5541
5542         (when (eq (cdr type) 'seen)
5543           (setq list (gnus-range-add list gnus-newsgroup-unseen)))
5544
5545         (when (eq (gnus-article-mark-to-type (cdr type)) 'list)
5546           (setq list (gnus-compress-sequence (set symbol (sort list '<)) t)))
5547
5548         (when (and (gnus-check-backend-function
5549                     'request-set-mark gnus-newsgroup-name)
5550                    (not (gnus-article-unpropagatable-p (cdr type))))
5551           (let* ((old (cdr (assq (cdr type) (gnus-info-marks info))))
5552                  (del (gnus-remove-from-range (gnus-copy-sequence old) list))
5553                  (add (gnus-remove-from-range
5554                        (gnus-copy-sequence list) old)))
5555             (when add
5556               (push (list add 'add (list (cdr type))) delta-marks))
5557             (when del
5558               (push (list del 'del (list (cdr type))) delta-marks))))
5559
5560         (when list
5561           (push (cons (cdr type) list) newmarked)))
5562
5563       (when delta-marks
5564         (unless (gnus-check-group gnus-newsgroup-name)
5565           (error "Can't open server for %s" gnus-newsgroup-name))
5566         (gnus-request-set-mark gnus-newsgroup-name delta-marks))
5567
5568       ;; Enter these new marks into the info of the group.
5569       (if (nthcdr 3 info)
5570           (setcar (nthcdr 3 info) newmarked)
5571         ;; Add the marks lists to the end of the info.
5572         (when newmarked
5573           (setcdr (nthcdr 2 info) (list newmarked))))
5574
5575       ;; Cut off the end of the info if there's nothing else there.
5576       (let ((i 5))
5577         (while (and (> i 2)
5578                     (not (nth i info)))
5579           (when (nthcdr (decf i) info)
5580             (setcdr (nthcdr i info) nil)))))))
5581
5582 (defun gnus-set-mode-line (where)
5583   "Set the mode line of the article or summary buffers.
5584 If WHERE is `summary', the summary mode line format will be used."
5585   ;; Is this mode line one we keep updated?
5586   (when (and (memq where gnus-updated-mode-lines)
5587              (symbol-value
5588               (intern (format "gnus-%s-mode-line-format-spec" where))))
5589     (let (mode-string)
5590       (save-excursion
5591         ;; We evaluate this in the summary buffer since these
5592         ;; variables are buffer-local to that buffer.
5593         (set-buffer gnus-summary-buffer)
5594        ;; We bind all these variables that are used in the `eval' form
5595         ;; below.
5596         (let* ((mformat (symbol-value
5597                          (intern
5598                           (format "gnus-%s-mode-line-format-spec" where))))
5599                (gnus-tmp-group-name (gnus-group-decoded-name
5600                                      gnus-newsgroup-name))
5601                (gnus-tmp-article-number (or gnus-current-article 0))
5602                (gnus-tmp-unread gnus-newsgroup-unreads)
5603                (gnus-tmp-unread-and-unticked (length gnus-newsgroup-unreads))
5604                (gnus-tmp-unselected (length gnus-newsgroup-unselected))
5605                (gnus-tmp-unread-and-unselected
5606                 (cond ((and (zerop gnus-tmp-unread-and-unticked)
5607                             (zerop gnus-tmp-unselected))
5608                        "")
5609                       ((zerop gnus-tmp-unselected)
5610                        (format "{%d more}" gnus-tmp-unread-and-unticked))
5611                       (t (format "{%d(+%d) more}"
5612                                  gnus-tmp-unread-and-unticked
5613                                  gnus-tmp-unselected))))
5614                (gnus-tmp-subject
5615                 (if (and gnus-current-headers
5616                          (vectorp gnus-current-headers))
5617                     (gnus-mode-string-quote
5618                      (mail-header-subject gnus-current-headers))
5619                   ""))
5620                bufname-length max-len
5621                gnus-tmp-header) ;; passed as argument to any user-format-funcs
5622           (setq mode-string (eval mformat))
5623           (setq bufname-length (if (string-match "%b" mode-string)
5624                                    (- (length
5625                                        (buffer-name
5626                                         (if (eq where 'summary)
5627                                             nil
5628                                           (get-buffer gnus-article-buffer))))
5629                                       2)
5630                                  0))
5631           (setq max-len (max 4 (if gnus-mode-non-string-length
5632                                    (- (window-width)
5633                                       gnus-mode-non-string-length
5634                                       bufname-length)
5635                                  (length mode-string))))
5636           ;; We might have to chop a bit of the string off...
5637           (when (> (length mode-string) max-len)
5638             (setq mode-string
5639                   (concat (truncate-string-to-width mode-string (- max-len 3))
5640                           "...")))
5641           ;; Pad the mode string a bit.
5642           (setq mode-string (format (format "%%-%ds" max-len) mode-string))))
5643       ;; Update the mode line.
5644       (setq mode-line-buffer-identification
5645             (gnus-mode-line-buffer-identification (list mode-string)))
5646       (set-buffer-modified-p t))))
5647
5648 (defun gnus-create-xref-hashtb (from-newsgroup headers unreads)
5649   "Go through the HEADERS list and add all Xrefs to a hash table.
5650 The resulting hash table is returned, or nil if no Xrefs were found."
5651   (let* ((virtual (gnus-virtual-group-p from-newsgroup))
5652          (prefix (if virtual "" (gnus-group-real-prefix from-newsgroup)))
5653          (xref-hashtb (gnus-make-hashtable))
5654          start group entry number xrefs header)
5655     (while headers
5656       (setq header (pop headers))
5657       (when (and (setq xrefs (mail-header-xref header))
5658                  (not (memq (setq number (mail-header-number header))
5659                             unreads)))
5660         (setq start 0)
5661         (while (string-match "\\([^ ]+\\)[:/]\\([0-9]+\\)" xrefs start)
5662           (setq start (match-end 0))
5663           (setq group (if prefix
5664                           (concat prefix (substring xrefs (match-beginning 1)
5665                                                     (match-end 1)))
5666                         (substring xrefs (match-beginning 1) (match-end 1))))
5667           (setq number
5668                 (string-to-number (substring xrefs (match-beginning 2)
5669                                           (match-end 2))))
5670           (if (setq entry (gnus-gethash group xref-hashtb))
5671               (setcdr entry (cons number (cdr entry)))
5672             (gnus-sethash group (cons number nil) xref-hashtb)))))
5673     (and start xref-hashtb)))
5674
5675 (defun gnus-mark-xrefs-as-read (from-newsgroup headers unreads)
5676   "Look through all the headers and mark the Xrefs as read."
5677   (let ((virtual (gnus-virtual-group-p from-newsgroup))
5678         name entry info xref-hashtb idlist method nth4)
5679     (save-excursion
5680       (set-buffer gnus-group-buffer)
5681       (when (setq xref-hashtb
5682                   (gnus-create-xref-hashtb from-newsgroup headers unreads))
5683         (mapatoms
5684          (lambda (group)
5685            (unless (string= from-newsgroup (setq name (symbol-name group)))
5686              (setq idlist (symbol-value group))
5687              ;; Dead groups are not updated.
5688              (and (prog1
5689                       (setq entry (gnus-gethash name gnus-newsrc-hashtb)
5690                             info (nth 2 entry))
5691                     (when (stringp (setq nth4 (gnus-info-method info)))
5692                       (setq nth4 (gnus-server-to-method nth4))))
5693                   ;; Only do the xrefs if the group has the same
5694                   ;; select method as the group we have just read.
5695                   (or (gnus-methods-equal-p
5696                        nth4 (gnus-find-method-for-group from-newsgroup))
5697                       virtual
5698                       (equal nth4 (setq method (gnus-find-method-for-group
5699                                                 from-newsgroup)))
5700                       (and (equal (car nth4) (car method))
5701                            (equal (nth 1 nth4) (nth 1 method))))
5702                   gnus-use-cross-reference
5703                   (or (not (eq gnus-use-cross-reference t))
5704                       virtual
5705                       ;; Only do cross-references on subscribed
5706                       ;; groups, if that is what is wanted.
5707                       (<= (gnus-info-level info) gnus-level-subscribed))
5708                   (gnus-group-make-articles-read name idlist))))
5709          xref-hashtb)))))
5710
5711 (defun gnus-compute-read-articles (group articles)
5712   (let* ((entry (gnus-gethash group gnus-newsrc-hashtb))
5713          (info (nth 2 entry))
5714          (active (gnus-active group))
5715          ninfo)
5716     (when entry
5717       ;; First peel off all invalid article numbers.
5718       (when active
5719         (let ((ids articles)
5720               id first)
5721           (while (setq id (pop ids))
5722             (when (and first (> id (cdr active)))
5723               ;; We'll end up in this situation in one particular
5724               ;; obscure situation.  If you re-scan a group and get
5725               ;; a new article that is cross-posted to a different
5726               ;; group that has not been re-scanned, you might get
5727               ;; crossposted article that has a higher number than
5728               ;; Gnus believes possible.  So we re-activate this
5729               ;; group as well.  This might mean doing the
5730               ;; crossposting thingy will *increase* the number
5731               ;; of articles in some groups.  Tsk, tsk.
5732               (setq active (or (gnus-activate-group group) active)))
5733             (when (or (> id (cdr active))
5734                       (< id (car active)))
5735               (setq articles (delq id articles))))))
5736       ;; If the read list is nil, we init it.
5737       (if (and active
5738                (null (gnus-info-read info))
5739                (> (car active) 1))
5740           (setq ninfo (cons 1 (1- (car active))))
5741         (setq ninfo (gnus-info-read info)))
5742       ;; Then we add the read articles to the range.
5743       (gnus-add-to-range
5744        ninfo (setq articles (sort articles '<))))))
5745
5746 (defun gnus-group-make-articles-read (group articles)
5747   "Update the info of GROUP to say that ARTICLES are read."
5748   (let* ((num 0)
5749          (entry (gnus-gethash group gnus-newsrc-hashtb))
5750          (info (nth 2 entry))
5751          (active (gnus-active group))
5752          range)
5753     (when entry
5754       (setq range (gnus-compute-read-articles group articles))
5755       (save-excursion
5756         (set-buffer gnus-group-buffer)
5757         (gnus-undo-register
5758           `(progn
5759              (gnus-info-set-marks ',info ',(gnus-info-marks info) t)
5760              (gnus-info-set-read ',info ',(gnus-info-read info))
5761              (gnus-get-unread-articles-in-group ',info (gnus-active ,group))
5762              (gnus-request-set-mark ,group (list (list ',range 'del '(read))))
5763              (gnus-group-update-group ,group t))))
5764       ;; Add the read articles to the range.
5765       (gnus-info-set-read info range)
5766       (gnus-request-set-mark group (list (list range 'add '(read))))
5767       ;; Then we have to re-compute how many unread
5768       ;; articles there are in this group.
5769       (when active
5770         (cond
5771          ((not range)
5772           (setq num (- (1+ (cdr active)) (car active))))
5773          ((not (listp (cdr range)))
5774           (setq num (- (cdr active) (- (1+ (cdr range))
5775                                        (car range)))))
5776          (t
5777           (while range
5778             (if (numberp (car range))
5779                 (setq num (1+ num))
5780               (setq num (+ num (- (1+ (cdar range)) (caar range)))))
5781             (setq range (cdr range)))
5782           (setq num (- (cdr active) num))))
5783         ;; Update the number of unread articles.
5784         (setcar entry num)
5785         ;; Update the group buffer.
5786         (unless (gnus-ephemeral-group-p group)
5787           (gnus-group-update-group group t))))))
5788
5789 (defvar gnus-newsgroup-none-id 0)
5790
5791 (defun gnus-get-newsgroup-headers (&optional dependencies force-new)
5792   (let ((cur nntp-server-buffer)
5793         (dependencies
5794          (or dependencies
5795              (save-excursion (set-buffer gnus-summary-buffer)
5796                              gnus-newsgroup-dependencies)))
5797         headers id end ref
5798         (mail-parse-charset gnus-newsgroup-charset)
5799         (mail-parse-ignored-charsets
5800          (save-excursion (condition-case nil
5801                              (set-buffer gnus-summary-buffer)
5802                            (error))
5803                          gnus-newsgroup-ignored-charsets)))
5804     (save-excursion
5805       (set-buffer nntp-server-buffer)
5806       ;; Translate all TAB characters into SPACE characters.
5807       (subst-char-in-region (point-min) (point-max) ?\t ?  t)
5808       (subst-char-in-region (point-min) (point-max) ?\r ?  t)
5809       (ietf-drums-unfold-fws)
5810       (gnus-run-hooks 'gnus-parse-headers-hook)
5811       (let ((case-fold-search t)
5812             in-reply-to header p lines chars)
5813         (goto-char (point-min))
5814         ;; Search to the beginning of the next header.  Error messages
5815         ;; do not begin with 2 or 3.
5816         (while (re-search-forward "^[23][0-9]+ " nil t)
5817           (setq id nil
5818                 ref nil)
5819           ;; This implementation of this function, with nine
5820           ;; search-forwards instead of the one re-search-forward and
5821           ;; a case (which basically was the old function) is actually
5822           ;; about twice as fast, even though it looks messier.  You
5823           ;; can't have everything, I guess.  Speed and elegance
5824           ;; doesn't always go hand in hand.
5825           (setq
5826            header
5827            (vector
5828             ;; Number.
5829             (prog1
5830                 (read cur)
5831               (end-of-line)
5832               (setq p (point))
5833               (narrow-to-region (point)
5834                                 (or (and (search-forward "\n.\n" nil t)
5835                                          (- (point) 2))
5836                                     (point))))
5837             ;; Subject.
5838             (progn
5839               (goto-char p)
5840               (if (search-forward "\nsubject:" nil t)
5841                   (funcall gnus-decode-encoded-word-function
5842                            (nnheader-header-value))
5843                 "(none)"))
5844             ;; From.
5845             (progn
5846               (goto-char p)
5847               (if (search-forward "\nfrom:" nil t)
5848                   (funcall gnus-decode-encoded-word-function
5849                            (nnheader-header-value))
5850                 "(nobody)"))
5851             ;; Date.
5852             (progn
5853               (goto-char p)
5854               (if (search-forward "\ndate:" nil t)
5855                   (nnheader-header-value) ""))
5856             ;; Message-ID.
5857             (progn
5858               (goto-char p)
5859               (setq id (if (re-search-forward
5860                             "^message-id: *\\(<[^\n\t> ]+>\\)" nil t)
5861                            ;; We do it this way to make sure the Message-ID
5862                            ;; is (somewhat) syntactically valid.
5863                            (buffer-substring (match-beginning 1)
5864                                              (match-end 1))
5865                          ;; If there was no message-id, we just fake one
5866                          ;; to make subsequent routines simpler.
5867                          (nnheader-generate-fake-message-id))))
5868             ;; References.
5869             (progn
5870               (goto-char p)
5871               (if (search-forward "\nreferences:" nil t)
5872                   (progn
5873                     (setq end (point))
5874                     (prog1
5875                         (nnheader-header-value)
5876                       (setq ref
5877                             (buffer-substring
5878                              (progn
5879                                (end-of-line)
5880                                (search-backward ">" end t)
5881                                (1+ (point)))
5882                              (progn
5883                                (search-backward "<" end t)
5884                                (point))))))
5885                 ;; Get the references from the in-reply-to header if there
5886                 ;; were no references and the in-reply-to header looks
5887                 ;; promising.
5888                 (if (and (search-forward "\nin-reply-to:" nil t)
5889                          (setq in-reply-to (nnheader-header-value))
5890                          (string-match "<[^>]+>" in-reply-to))
5891                     (let (ref2)
5892                       (setq ref (substring in-reply-to (match-beginning 0)
5893                                            (match-end 0)))
5894                       (while (string-match "<[^>]+>" in-reply-to (match-end 0))
5895                         (setq ref2 (substring in-reply-to (match-beginning 0)
5896                                               (match-end 0)))
5897                         (when (> (length ref2) (length ref))
5898                           (setq ref ref2)))
5899                       ref)
5900                   (setq ref nil))))
5901             ;; Chars.
5902             (progn
5903               (goto-char p)
5904               (if (search-forward "\nchars: " nil t)
5905                   (if (numberp (setq chars (ignore-errors (read cur))))
5906                       chars -1)
5907                 -1))
5908             ;; Lines.
5909             (progn
5910               (goto-char p)
5911               (if (search-forward "\nlines: " nil t)
5912                   (if (numberp (setq lines (ignore-errors (read cur))))
5913                       lines -1)
5914                 -1))
5915             ;; Xref.
5916             (progn
5917               (goto-char p)
5918               (and (search-forward "\nxref:" nil t)
5919                    (nnheader-header-value)))
5920             ;; Extra.
5921             (when gnus-extra-headers
5922               (let ((extra gnus-extra-headers)
5923                     out)
5924                 (while extra
5925                   (goto-char p)
5926                   (when (search-forward
5927                          (concat "\n" (symbol-name (car extra)) ":") nil t)
5928                     (push (cons (car extra) (nnheader-header-value))
5929                           out))
5930                   (pop extra))
5931                 out))))
5932           (when (equal id ref)
5933             (setq ref nil))
5934
5935           (when gnus-alter-header-function
5936             (funcall gnus-alter-header-function header)
5937             (setq id (mail-header-id header)
5938                   ref (gnus-parent-id (mail-header-references header))))
5939
5940           (when (setq header
5941                       (gnus-dependencies-add-header
5942                        header dependencies force-new))
5943             (push header headers))
5944           (goto-char (point-max))
5945           (widen))
5946         (nreverse headers)))))
5947
5948 ;; Goes through the xover lines and returns a list of vectors
5949 (defun gnus-get-newsgroup-headers-xover (sequence &optional
5950                                                   force-new dependencies
5951                                                   group also-fetch-heads)
5952   "Parse the news overview data in the server buffer.
5953 Return a list of headers that match SEQUENCE (see
5954 `nntp-retrieve-headers')."
5955   ;; Get the Xref when the users reads the articles since most/some
5956   ;; NNTP servers do not include Xrefs when using XOVER.
5957   (setq gnus-article-internal-prepare-hook '(gnus-article-get-xrefs))
5958   (let ((mail-parse-charset gnus-newsgroup-charset)
5959         (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets)
5960         (cur nntp-server-buffer)
5961         (dependencies (or dependencies gnus-newsgroup-dependencies))
5962         (allp (cond
5963                ((eq gnus-read-all-available-headers t)
5964                 t)
5965                ((stringp gnus-read-all-available-headers)
5966                 (string-match gnus-read-all-available-headers group))
5967                (t
5968                 nil)))
5969         number headers header)
5970     (save-excursion
5971       (set-buffer nntp-server-buffer)
5972       (subst-char-in-region (point-min) (point-max) ?\r ?  t)
5973       ;; Allow the user to mangle the headers before parsing them.
5974       (gnus-run-hooks 'gnus-parse-headers-hook)
5975       (goto-char (point-min))
5976       (gnus-parse-without-error
5977         (while (and (or sequence allp)
5978                     (not (eobp)))
5979           (setq number (read cur))
5980           (when (not allp)
5981             (while (and sequence
5982                         (< (car sequence) number))
5983               (setq sequence (cdr sequence))))
5984           (when (and (or allp
5985                          (and sequence
5986                               (eq number (car sequence))))
5987                      (progn
5988                        (setq sequence (cdr sequence))
5989                        (setq header (inline
5990                                       (gnus-nov-parse-line
5991                                        number dependencies force-new)))))
5992             (push header headers))
5993           (forward-line 1)))
5994       ;; A common bug in inn is that if you have posted an article and
5995       ;; then retrieves the active file, it will answer correctly --
5996       ;; the new article is included.  However, a NOV entry for the
5997       ;; article may not have been generated yet, so this may fail.
5998       ;; We work around this problem by retrieving the last few
5999       ;; headers using HEAD.
6000       (if (or (not also-fetch-heads)
6001               (not sequence))
6002           ;; We (probably) got all the headers.
6003           (nreverse headers)
6004         (let ((gnus-nov-is-evil t))
6005           (nconc
6006            (nreverse headers)
6007            (when (eq (gnus-retrieve-headers sequence group) 'headers)
6008              (gnus-get-newsgroup-headers))))))))
6009
6010 (defun gnus-article-get-xrefs ()
6011   "Fill in the Xref value in `gnus-current-headers', if necessary.
6012 This is meant to be called in `gnus-article-internal-prepare-hook'."
6013   (let ((headers (save-excursion (set-buffer gnus-summary-buffer)
6014                                  gnus-current-headers)))
6015     (or (not gnus-use-cross-reference)
6016         (not headers)
6017         (and (mail-header-xref headers)
6018              (not (string= (mail-header-xref headers) "")))
6019         (let ((case-fold-search t)
6020               xref)
6021           (save-restriction
6022             (nnheader-narrow-to-headers)
6023             (goto-char (point-min))
6024             (when (or (and (not (eobp))
6025                            (eq (downcase (char-after)) ?x)
6026                            (looking-at "Xref:"))
6027                       (search-forward "\nXref:" nil t))
6028               (goto-char (1+ (match-end 0)))
6029               (setq xref (buffer-substring (point) (gnus-point-at-eol)))
6030               (mail-header-set-xref headers xref)))))))
6031
6032 (defun gnus-summary-insert-subject (id &optional old-header use-old-header)
6033   "Find article ID and insert the summary line for that article.
6034 OLD-HEADER can either be a header or a line number to insert
6035 the subject line on."
6036   (let* ((line (and (numberp old-header) old-header))
6037          (old-header (and (vectorp old-header) old-header))
6038          (header (cond ((and old-header use-old-header)
6039                         old-header)
6040                        ((and (numberp id)
6041                              (gnus-number-to-header id))
6042                         (gnus-number-to-header id))
6043                        (t
6044                         (gnus-read-header id))))
6045          (number (and (numberp id) id))
6046          d)
6047     (when header
6048       ;; Rebuild the thread that this article is part of and go to the
6049       ;; article we have fetched.
6050       (when (and (not gnus-show-threads)
6051                  old-header)
6052         (when (and number
6053                    (setq d (gnus-data-find (mail-header-number old-header))))
6054           (goto-char (gnus-data-pos d))
6055           (gnus-data-remove
6056            number
6057            (- (gnus-point-at-bol)
6058               (prog1
6059                   (1+ (gnus-point-at-eol))
6060                 (gnus-delete-line))))))
6061       ;; Remove list identifiers from subject.
6062       (when gnus-list-identifiers
6063         (let ((gnus-newsgroup-headers (list header)))
6064           (gnus-summary-remove-list-identifiers)))
6065       (when old-header
6066         (mail-header-set-number header (mail-header-number old-header)))
6067       (setq gnus-newsgroup-sparse
6068             (delq (setq number (mail-header-number header))
6069                   gnus-newsgroup-sparse))
6070       (setq gnus-newsgroup-ancient (delq number gnus-newsgroup-ancient))
6071       (push number gnus-newsgroup-limit)
6072       (gnus-rebuild-thread (mail-header-id header) line)
6073       (gnus-summary-goto-subject number nil t))
6074     (when (and (numberp number)
6075                (> number 0))
6076       ;; We have to update the boundaries even if we can't fetch the
6077       ;; article if ID is a number -- so that the next `P' or `N'
6078       ;; command will fetch the previous (or next) article even
6079       ;; if the one we tried to fetch this time has been canceled.
6080       (when (> number gnus-newsgroup-end)
6081         (setq gnus-newsgroup-end number))
6082       (when (< number gnus-newsgroup-begin)
6083         (setq gnus-newsgroup-begin number))
6084       (setq gnus-newsgroup-unselected
6085             (delq number gnus-newsgroup-unselected)))
6086     ;; Report back a success?
6087     (and header (mail-header-number header))))
6088
6089 ;;; Process/prefix in the summary buffer
6090
6091 (defun gnus-summary-work-articles (n)
6092   "Return a list of articles to be worked upon.
6093 The prefix argument, the list of process marked articles, and the
6094 current article will be taken into consideration."
6095   (save-excursion
6096     (set-buffer gnus-summary-buffer)
6097     (cond
6098      (n
6099       ;; A numerical prefix has been given.
6100       (setq n (prefix-numeric-value n))
6101       (let ((backward (< n 0))
6102             (n (abs (prefix-numeric-value n)))
6103             articles article)
6104         (save-excursion
6105           (while
6106               (and (> n 0)
6107                    (push (setq article (gnus-summary-article-number))
6108                          articles)
6109                    (if backward
6110                        (gnus-summary-find-prev nil article)
6111                      (gnus-summary-find-next nil article)))
6112             (decf n)))
6113         (nreverse articles)))
6114      ((and (gnus-region-active-p) (mark))
6115       (message "region active")
6116       ;; Work on the region between point and mark.
6117       (let ((max (max (point) (mark)))
6118             articles article)
6119         (save-excursion
6120           (goto-char (min (point) (mark)))
6121           (while
6122               (and
6123                (push (setq article (gnus-summary-article-number)) articles)
6124                (gnus-summary-find-next nil article)
6125                (< (point) max)))
6126           (nreverse articles))))
6127      (gnus-newsgroup-processable
6128       ;; There are process-marked articles present.
6129       ;; Save current state.
6130       (gnus-summary-save-process-mark)
6131       ;; Return the list.
6132       (reverse gnus-newsgroup-processable))
6133      (t
6134       ;; Just return the current article.
6135       (list (gnus-summary-article-number))))))
6136
6137 (defmacro gnus-summary-iterate (arg &rest forms)
6138   "Iterate over the process/prefixed articles and do FORMS.
6139 ARG is the interactive prefix given to the command.  FORMS will be
6140 executed with point over the summary line of the articles."
6141   (let ((articles (make-symbol "gnus-summary-iterate-articles")))
6142     `(let ((,articles (gnus-summary-work-articles ,arg)))
6143        (while ,articles
6144          (gnus-summary-goto-subject (car ,articles))
6145          ,@forms
6146          (pop ,articles)))))
6147
6148 (put 'gnus-summary-iterate 'lisp-indent-function 1)
6149 (put 'gnus-summary-iterate 'edebug-form-spec '(form body))
6150
6151 (defun gnus-summary-save-process-mark ()
6152   "Push the current set of process marked articles on the stack."
6153   (interactive)
6154   (push (copy-sequence gnus-newsgroup-processable)
6155         gnus-newsgroup-process-stack))
6156
6157 (defun gnus-summary-kill-process-mark ()
6158   "Push the current set of process marked articles on the stack and unmark."
6159   (interactive)
6160   (gnus-summary-save-process-mark)
6161   (gnus-summary-unmark-all-processable))
6162
6163 (defun gnus-summary-yank-process-mark ()
6164   "Pop the last process mark state off the stack and restore it."
6165   (interactive)
6166   (unless gnus-newsgroup-process-stack
6167     (error "Empty mark stack"))
6168   (gnus-summary-process-mark-set (pop gnus-newsgroup-process-stack)))
6169
6170 (defun gnus-summary-process-mark-set (set)
6171   "Make SET into the current process marked articles."
6172   (gnus-summary-unmark-all-processable)
6173   (while set
6174     (gnus-summary-set-process-mark (pop set))))
6175
6176 ;;; Searching and stuff
6177
6178 (defun gnus-summary-search-group (&optional backward use-level)
6179   "Search for next unread newsgroup.
6180 If optional argument BACKWARD is non-nil, search backward instead."
6181   (save-excursion
6182     (set-buffer gnus-group-buffer)
6183     (when (gnus-group-search-forward
6184            backward nil (if use-level (gnus-group-group-level) nil))
6185       (gnus-group-group-name))))
6186
6187 (defun gnus-summary-best-group (&optional exclude-group)
6188   "Find the name of the best unread group.
6189 If EXCLUDE-GROUP, do not go to this group."
6190   (save-excursion
6191     (set-buffer gnus-group-buffer)
6192     (save-excursion
6193       (gnus-group-best-unread-group exclude-group))))
6194
6195 (defun gnus-summary-find-next (&optional unread article backward)
6196   (if backward
6197       (gnus-summary-find-prev unread article)
6198     (let* ((dummy (gnus-summary-article-intangible-p))
6199            (article (or article (gnus-summary-article-number)))
6200            (data (gnus-data-find-list article))
6201            result)
6202       (when (and (not dummy)
6203                  (or (not gnus-summary-check-current)
6204                      (not unread)
6205                      (not (gnus-data-unread-p (car data)))))
6206         (setq data (cdr data)))
6207       (when (setq result
6208                   (if unread
6209                       (progn
6210                         (while data
6211                           (unless (memq (gnus-data-number (car data))
6212                                         (cond
6213                                          ((eq gnus-auto-goto-ignores
6214                                               'always-undownloaded)
6215                                           gnus-newsgroup-undownloaded)
6216                                          (gnus-plugged
6217                                           nil)
6218                                          ((eq gnus-auto-goto-ignores
6219                                               'unfetched)
6220                                           gnus-newsgroup-unfetched)
6221                                          ((eq gnus-auto-goto-ignores
6222                                               'undownloaded)
6223                                           gnus-newsgroup-undownloaded)))
6224                             (when (gnus-data-unread-p (car data))
6225                               (setq result (car data)
6226                                     data nil)))
6227                           (setq data (cdr data)))
6228                         result)
6229                     (car data)))
6230         (goto-char (gnus-data-pos result))
6231         (gnus-data-number result)))))
6232
6233 (defun gnus-summary-find-prev (&optional unread article)
6234   (let* ((eobp (eobp))
6235          (article (or article (gnus-summary-article-number)))
6236          (data (gnus-data-find-list article (gnus-data-list 'rev)))
6237          result)
6238     (when (and (not eobp)
6239                (or (not gnus-summary-check-current)
6240                    (not unread)
6241                    (not (gnus-data-unread-p (car data)))))
6242       (setq data (cdr data)))
6243     (when (setq result
6244                 (if unread
6245                     (progn
6246                       (while data
6247                         (unless (memq (gnus-data-number (car data))
6248                                       (cond
6249                                        ((eq gnus-auto-goto-ignores
6250                                             'always-undownloaded)
6251                                         gnus-newsgroup-undownloaded)
6252                                        (gnus-plugged
6253                                         nil)
6254                                        ((eq gnus-auto-goto-ignores
6255                                             'unfetched)
6256                                         gnus-newsgroup-unfetched)
6257                                        ((eq gnus-auto-goto-ignores
6258                                             'undownloaded)
6259                                         gnus-newsgroup-undownloaded)))
6260                           (when (gnus-data-unread-p (car data))
6261                             (setq result (car data)
6262                                   data nil)))
6263                         (setq data (cdr data)))
6264                       result)
6265                   (car data)))
6266       (goto-char (gnus-data-pos result))
6267       (gnus-data-number result))))
6268
6269 (defun gnus-summary-find-subject (subject &optional unread backward article)
6270   (let* ((simp-subject (gnus-simplify-subject-fully subject))
6271          (article (or article (gnus-summary-article-number)))
6272          (articles (gnus-data-list backward))
6273          (arts (gnus-data-find-list article articles))
6274          result)
6275     (when (or (not gnus-summary-check-current)
6276               (not unread)
6277               (not (gnus-data-unread-p (car arts))))
6278       (setq arts (cdr arts)))
6279     (while arts
6280       (and (or (not unread)
6281                (gnus-data-unread-p (car arts)))
6282            (vectorp (gnus-data-header (car arts)))
6283            (gnus-subject-equal
6284             simp-subject (mail-header-subject (gnus-data-header (car arts))) t)
6285            (setq result (car arts)
6286                  arts nil))
6287       (setq arts (cdr arts)))
6288     (and result
6289          (goto-char (gnus-data-pos result))
6290          (gnus-data-number result))))
6291
6292 (defun gnus-summary-search-forward (&optional unread subject backward)
6293   "Search forward for an article.
6294 If UNREAD, look for unread articles.  If SUBJECT, look for
6295 articles with that subject.  If BACKWARD, search backward instead."
6296   (cond (subject (gnus-summary-find-subject subject unread backward))
6297         (backward (gnus-summary-find-prev unread))
6298         (t (gnus-summary-find-next unread))))
6299
6300 (defun gnus-recenter (&optional n)
6301   "Center point in window and redisplay frame.
6302 Also do horizontal recentering."
6303   (interactive "P")
6304   (when (and gnus-auto-center-summary
6305              (not (eq gnus-auto-center-summary 'vertical)))
6306     (gnus-horizontal-recenter))
6307   (recenter n))
6308
6309 (defun gnus-summary-recenter ()
6310   "Center point in the summary window.
6311 If `gnus-auto-center-summary' is nil, or the article buffer isn't
6312 displayed, no centering will be performed."
6313   ;; Suggested by earle@mahendo.JPL.NASA.GOV (Greg Earle).
6314   ;; Recenter only when requested.  Suggested by popovich@park.cs.columbia.edu.
6315   (interactive)
6316   ;; The user has to want it.
6317   (when gnus-auto-center-summary
6318     (let* ((top (cond ((< (window-height) 4) 0)
6319                       ((< (window-height) 7) 1)
6320                       (t (if (numberp gnus-auto-center-summary)
6321                              gnus-auto-center-summary
6322                            2))))
6323            (height (1- (window-height)))
6324            (bottom (save-excursion (goto-char (point-max))
6325                                    (forward-line (- height))
6326                                    (point)))
6327            (window (get-buffer-window (current-buffer))))
6328       (when (get-buffer-window gnus-article-buffer)
6329         ;; Only do recentering when the article buffer is displayed,
6330         ;; Set the window start to either `bottom', which is the biggest
6331         ;; possible valid number, or the second line from the top,
6332         ;; whichever is the least.
6333         (let ((top-pos (save-excursion (forward-line (- top)) (point))))
6334           (if (> bottom top-pos)
6335               ;; Keep the second line from the top visible
6336               (set-window-start window top-pos t)
6337             ;; Try to keep the bottom line visible; if it's partially
6338             ;; obscured, either scroll one more line to make it fully
6339             ;; visible, or revert to using TOP-POS.
6340             (save-excursion
6341               (goto-char (point-max))
6342               (forward-line -1)
6343               (let ((last-line-start (point)))
6344                 (goto-char bottom)
6345                 (set-window-start window (point) t)
6346                 (when (not (pos-visible-in-window-p last-line-start window))
6347                   (forward-line 1)
6348                   (set-window-start window (min (point) top-pos) t)))))))
6349       ;; Do horizontal recentering while we're at it.
6350       (when (and (get-buffer-window (current-buffer) t)
6351                  (not (eq gnus-auto-center-summary 'vertical)))
6352         (let ((selected (selected-window)))
6353           (select-window (get-buffer-window (current-buffer) t))
6354           (gnus-summary-position-point)
6355           (gnus-horizontal-recenter)
6356           (select-window selected))))))
6357
6358 (defun gnus-summary-jump-to-group (newsgroup)
6359   "Move point to NEWSGROUP in group mode buffer."
6360   ;; Keep update point of group mode buffer if visible.
6361   (if (eq (current-buffer) (get-buffer gnus-group-buffer))
6362       (save-window-excursion
6363         ;; Take care of tree window mode.
6364         (when (get-buffer-window gnus-group-buffer)
6365           (pop-to-buffer gnus-group-buffer))
6366         (gnus-group-jump-to-group newsgroup))
6367     (save-excursion
6368       ;; Take care of tree window mode.
6369       (if (get-buffer-window gnus-group-buffer)
6370           (pop-to-buffer gnus-group-buffer)
6371         (set-buffer gnus-group-buffer))
6372       (gnus-group-jump-to-group newsgroup))))
6373
6374 ;; This function returns a list of article numbers based on the
6375 ;; difference between the ranges of read articles in this group and
6376 ;; the range of active articles.
6377 (defun gnus-list-of-unread-articles (group)
6378   (let* ((read (gnus-info-read (gnus-get-info group)))
6379          (active (or (gnus-active group) (gnus-activate-group group)))
6380          (last (cdr active))
6381          first nlast unread)
6382     ;; If none are read, then all are unread.
6383     (if (not read)
6384         (setq first (car active))
6385       ;; If the range of read articles is a single range, then the
6386       ;; first unread article is the article after the last read
6387       ;; article.  Sounds logical, doesn't it?
6388       (if (and (not (listp (cdr read)))
6389                (or (< (car read) (car active))
6390                    (progn (setq read (list read))
6391                           nil)))
6392           (setq first (max (car active) (1+ (cdr read))))
6393         ;; `read' is a list of ranges.
6394         (when (/= (setq nlast (or (and (numberp (car read)) (car read))
6395                                   (caar read)))
6396                   1)
6397           (setq first (car active)))
6398         (while read
6399           (when first
6400             (while (< first nlast)
6401               (setq unread (cons first unread)
6402                     first (1+ first))))
6403           (setq first (1+ (if (atom (car read)) (car read) (cdar read))))
6404           (setq nlast (if (atom (cadr read)) (cadr read) (caadr read)))
6405           (setq read (cdr read)))))
6406     ;; And add the last unread articles.
6407     (while (<= first last)
6408       (setq unread (cons first unread)
6409             first (1+ first)))
6410     ;; Return the list of unread articles.
6411     (delq 0 (nreverse unread))))
6412
6413 (defun gnus-list-of-read-articles (group)
6414   "Return a list of unread, unticked and non-dormant articles."
6415   (let* ((info (gnus-get-info group))
6416          (marked (gnus-info-marks info))
6417          (active (gnus-active group)))
6418     (and info active
6419          (gnus-list-range-difference
6420           (gnus-list-range-difference
6421            (gnus-sorted-complement
6422             (gnus-uncompress-range active)
6423             (gnus-list-of-unread-articles group))
6424            (cdr (assq 'dormant marked)))
6425           (cdr (assq 'tick marked))))))
6426
6427 ;; This function returns a sequence of article numbers based on the
6428 ;; difference between the ranges of read articles in this group and
6429 ;; the range of active articles.
6430 (defun gnus-sequence-of-unread-articles (group)
6431   (let* ((read (gnus-info-read (gnus-get-info group)))
6432          (active (or (gnus-active group) (gnus-activate-group group)))
6433          (last (cdr active))
6434          first nlast unread)
6435     ;; If none are read, then all are unread.
6436     (if (not read)
6437         (setq first (car active))
6438       ;; If the range of read articles is a single range, then the
6439       ;; first unread article is the article after the last read
6440       ;; article.  Sounds logical, doesn't it?
6441       (if (and (not (listp (cdr read)))
6442                (or (< (car read) (car active))
6443                    (progn (setq read (list read))
6444                           nil)))
6445           (setq first (max (car active) (1+ (cdr read))))
6446         ;; `read' is a list of ranges.
6447         (when (/= (setq nlast (or (and (numberp (car read)) (car read))
6448                                   (caar read)))
6449                   1)
6450           (setq first (car active)))
6451         (while read
6452           (when first
6453             (push (cons first nlast) unread))
6454           (setq first (1+ (if (atom (car read)) (car read) (cdar read))))
6455           (setq nlast (if (atom (cadr read)) (cadr read) (caadr read)))
6456           (setq read (cdr read)))))
6457     ;; And add the last unread articles.
6458     (cond ((not (and first last))
6459            nil)
6460           ((< first last)
6461            (push (cons first last) unread))
6462           ((= first last)
6463            (push first unread)))
6464     ;; Return the sequence of unread articles.
6465     (delq 0 (nreverse unread))))
6466
6467 ;; Various summary commands
6468
6469 (defun gnus-summary-select-article-buffer ()
6470   "Reconfigure windows to show article buffer."
6471   (interactive)
6472   (if (not (gnus-buffer-live-p gnus-article-buffer))
6473       (error "There is no article buffer for this summary buffer")
6474     (gnus-configure-windows 'article)
6475     (select-window (get-buffer-window gnus-article-buffer))))
6476
6477 (defun gnus-summary-universal-argument (arg)
6478   "Perform any operation on all articles that are process/prefixed."
6479   (interactive "P")
6480   (let ((articles (gnus-summary-work-articles arg))
6481         func article)
6482     (if (eq
6483          (setq
6484           func
6485           (key-binding
6486            (read-key-sequence
6487             (substitute-command-keys
6488              "\\<gnus-summary-mode-map>\\[gnus-summary-universal-argument]"))))
6489          'undefined)
6490         (gnus-error 1 "Undefined key")
6491       (save-excursion
6492         (while articles
6493           (gnus-summary-goto-subject (setq article (pop articles)))
6494           (let (gnus-newsgroup-processable)
6495             (command-execute func))
6496           (gnus-summary-remove-process-mark article)))))
6497   (gnus-summary-position-point))
6498
6499 (defun gnus-summary-toggle-truncation (&optional arg)
6500   "Toggle truncation of summary lines.
6501 With ARG, turn line truncation on if ARG is positive."
6502   (interactive "P")
6503   (setq truncate-lines
6504         (if (null arg) (not truncate-lines)
6505           (> (prefix-numeric-value arg) 0)))
6506   (redraw-display))
6507
6508 (defun gnus-summary-find-for-reselect ()
6509   "Return the number of an article to stay on across a reselect.
6510 The current article is considered, then following articles, then previous
6511 articles.  An article is sought which is not cancelled and isn't a temporary
6512 insertion from another group.  If there's no such then return a dummy 0."
6513   (let (found)
6514     (dolist (rev '(nil t))
6515       (unless found      ; don't demand the reverse list if we don't need it
6516         (let ((data (gnus-data-find-list
6517                      (gnus-summary-article-number) (gnus-data-list rev))))
6518           (while (and data (not found))
6519             (if (and (< 0 (gnus-data-number (car data)))
6520                      (not (eq gnus-canceled-mark (gnus-data-mark (car data)))))
6521                 (setq found (gnus-data-number (car data))))
6522             (setq data (cdr data))))))
6523     (or found 0)))
6524
6525 (defun gnus-summary-reselect-current-group (&optional all rescan)
6526   "Exit and then reselect the current newsgroup.
6527 The prefix argument ALL means to select all articles."
6528   (interactive "P")
6529   (when (gnus-ephemeral-group-p gnus-newsgroup-name)
6530     (error "Ephemeral groups can't be reselected"))
6531   (let ((current-subject (gnus-summary-find-for-reselect))
6532         (group gnus-newsgroup-name))
6533     (setq gnus-newsgroup-begin nil)
6534     (gnus-summary-exit nil 'leave-hidden)
6535     ;; We have to adjust the point of group mode buffer because
6536     ;; point was moved to the next unread newsgroup by exiting.
6537     (gnus-summary-jump-to-group group)
6538     (when rescan
6539       (save-excursion
6540         (gnus-group-get-new-news-this-group 1)))
6541     (gnus-group-read-group all t)
6542     (gnus-summary-goto-subject current-subject nil t)))
6543
6544 (defun gnus-summary-rescan-group (&optional all)
6545   "Exit the newsgroup, ask for new articles, and select the newsgroup."
6546   (interactive "P")
6547   (gnus-summary-reselect-current-group all t))
6548
6549 (defun gnus-summary-update-info (&optional non-destructive)
6550   (save-excursion
6551     (let ((group gnus-newsgroup-name))
6552       (when group
6553         (when gnus-newsgroup-kill-headers
6554           (setq gnus-newsgroup-killed
6555                 (gnus-compress-sequence
6556                  (gnus-sorted-union
6557                   (gnus-list-range-intersection
6558                    gnus-newsgroup-unselected gnus-newsgroup-killed)
6559                   gnus-newsgroup-unreads)
6560                  t)))
6561         (unless (listp (cdr gnus-newsgroup-killed))
6562           (setq gnus-newsgroup-killed (list gnus-newsgroup-killed)))
6563         (let ((headers gnus-newsgroup-headers))
6564           ;; Set the new ranges of read articles.
6565           (save-excursion
6566             (set-buffer gnus-group-buffer)
6567             (gnus-undo-force-boundary))
6568           (gnus-update-read-articles
6569            group (gnus-sorted-union
6570                   gnus-newsgroup-unreads gnus-newsgroup-unselected))
6571           ;; Set the current article marks.
6572           (let ((gnus-newsgroup-scored
6573                  (if (and (not gnus-save-score)
6574                           (not non-destructive))
6575                      nil
6576                    gnus-newsgroup-scored)))
6577             (save-excursion
6578               (gnus-update-marks)))
6579           ;; Do the cross-ref thing.
6580           (when gnus-use-cross-reference
6581             (gnus-mark-xrefs-as-read group headers gnus-newsgroup-unreads))
6582           ;; Do not switch windows but change the buffer to work.
6583           (set-buffer gnus-group-buffer)
6584           (unless (gnus-ephemeral-group-p group)
6585             (gnus-group-update-group group)))))))
6586
6587 (defun gnus-summary-save-newsrc (&optional force)
6588   "Save the current number of read/marked articles in the dribble buffer.
6589 The dribble buffer will then be saved.
6590 If FORCE (the prefix), also save the .newsrc file(s)."
6591   (interactive "P")
6592   (gnus-summary-update-info t)
6593   (if force
6594       (gnus-save-newsrc-file)
6595     (gnus-dribble-save)))
6596
6597 (defun gnus-summary-exit (&optional temporary leave-hidden)
6598   "Exit reading current newsgroup, and then return to group selection mode.
6599 `gnus-exit-group-hook' is called with no arguments if that value is non-nil."
6600   (interactive)
6601   (gnus-set-global-variables)
6602   (when (gnus-buffer-live-p gnus-article-buffer)
6603     (save-excursion
6604       (set-buffer gnus-article-buffer)
6605       (mm-destroy-parts gnus-article-mime-handles)
6606       ;; Set it to nil for safety reason.
6607       (setq gnus-article-mime-handle-alist nil)
6608       (setq gnus-article-mime-handles nil)))
6609   (gnus-kill-save-kill-buffer)
6610   (gnus-async-halt-prefetch)
6611   (let* ((group gnus-newsgroup-name)
6612          (quit-config (gnus-group-quit-config gnus-newsgroup-name))
6613          (gnus-group-is-exiting-p t)
6614          (mode major-mode)
6615          (group-point nil)
6616          (buf (current-buffer)))
6617     (unless quit-config
6618       ;; Do adaptive scoring, and possibly save score files.
6619       (when gnus-newsgroup-adaptive
6620         (gnus-score-adaptive))
6621       (when gnus-use-scoring
6622         (gnus-score-save)))
6623     (gnus-run-hooks 'gnus-summary-prepare-exit-hook)
6624     ;; If we have several article buffers, we kill them at exit.
6625     (unless gnus-single-article-buffer
6626       (gnus-kill-buffer gnus-original-article-buffer)
6627       (setq gnus-article-current nil))
6628     (when gnus-use-cache
6629       (gnus-cache-possibly-remove-articles)
6630       (gnus-cache-save-buffers))
6631     (gnus-async-prefetch-remove-group group)
6632     (when gnus-suppress-duplicates
6633       (gnus-dup-enter-articles))
6634     (when gnus-use-trees
6635       (gnus-tree-close group))
6636     (when gnus-use-cache
6637       (gnus-cache-write-active))
6638     ;; Remove entries for this group.
6639     (nnmail-purge-split-history (gnus-group-real-name group))
6640     ;; Make all changes in this group permanent.
6641     (unless quit-config
6642       (gnus-run-hooks 'gnus-exit-group-hook)
6643       (gnus-summary-update-info))
6644     (gnus-close-group group)
6645     ;; Make sure where we were, and go to next newsgroup.
6646     (set-buffer gnus-group-buffer)
6647     (unless quit-config
6648       (gnus-group-jump-to-group group))
6649     (gnus-run-hooks 'gnus-summary-exit-hook)
6650     (unless (or quit-config
6651                 ;; If this group has disappeared from the summary
6652                 ;; buffer, don't skip forwards.
6653                 (not (string= group (gnus-group-group-name))))
6654       (gnus-group-next-unread-group 1))
6655     (setq group-point (point))
6656     (if temporary
6657         nil                             ;Nothing to do.
6658       ;; If we have several article buffers, we kill them at exit.
6659       (unless gnus-single-article-buffer
6660         (gnus-kill-buffer gnus-article-buffer)
6661         (gnus-kill-buffer gnus-original-article-buffer)
6662         (setq gnus-article-current nil))
6663       (set-buffer buf)
6664       (if (not gnus-kill-summary-on-exit)
6665           (progn
6666             (gnus-deaden-summary)
6667             (setq mode nil))
6668         ;; We set all buffer-local variables to nil.  It is unclear why
6669         ;; this is needed, but if we don't, buffer-local variables are
6670         ;; not garbage-collected, it seems.  This would the lead to en
6671         ;; ever-growing Emacs.
6672         (gnus-summary-clear-local-variables)
6673         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
6674           (gnus-summary-clear-local-variables))
6675         (when (get-buffer gnus-article-buffer)
6676           (bury-buffer gnus-article-buffer))
6677         ;; We clear the global counterparts of the buffer-local
6678         ;; variables as well, just to be on the safe side.
6679         (set-buffer gnus-group-buffer)
6680         (gnus-summary-clear-local-variables)
6681         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
6682           (gnus-summary-clear-local-variables))
6683         ;; Return to group mode buffer.
6684         (when (eq mode 'gnus-summary-mode)
6685           (gnus-kill-buffer buf)))
6686       (setq gnus-current-select-method gnus-select-method)
6687       (set-buffer gnus-group-buffer)
6688       (if quit-config
6689           (gnus-handle-ephemeral-exit quit-config)
6690         (goto-char group-point)
6691         ;; If gnus-group-buffer is already displayed, make sure we also move
6692         ;; the cursor in the window that displays it.
6693         (let ((win (get-buffer-window (current-buffer) 0)))
6694           (if win (set-window-point win (point))))
6695         (unless leave-hidden
6696           (gnus-configure-windows 'group 'force)))
6697       ;; Clear the current group name.
6698       (unless quit-config
6699         (setq gnus-newsgroup-name nil)))))
6700
6701 (defalias 'gnus-summary-quit 'gnus-summary-exit-no-update)
6702 (defun gnus-summary-exit-no-update (&optional no-questions)
6703   "Quit reading current newsgroup without updating read article info."
6704   (interactive)
6705   (let* ((group gnus-newsgroup-name)
6706          (gnus-group-is-exiting-p t)
6707          (gnus-group-is-exiting-without-update-p t)
6708          (quit-config (gnus-group-quit-config group)))
6709     (when (or no-questions
6710               gnus-expert-user
6711               (gnus-y-or-n-p "Discard changes to this group and exit? "))
6712       (gnus-async-halt-prefetch)
6713       (run-hooks 'gnus-summary-prepare-exit-hook)
6714       (when (gnus-buffer-live-p gnus-article-buffer)
6715         (save-excursion
6716           (set-buffer gnus-article-buffer)
6717           (mm-destroy-parts gnus-article-mime-handles)
6718           ;; Set it to nil for safety reason.
6719           (setq gnus-article-mime-handle-alist nil)
6720           (setq gnus-article-mime-handles nil)))
6721       ;; If we have several article buffers, we kill them at exit.
6722       (unless gnus-single-article-buffer
6723         (gnus-kill-buffer gnus-article-buffer)
6724         (gnus-kill-buffer gnus-original-article-buffer)
6725         (setq gnus-article-current nil))
6726       (if (not gnus-kill-summary-on-exit)
6727           (gnus-deaden-summary)
6728         (gnus-close-group group)
6729         (gnus-summary-clear-local-variables)
6730         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
6731           (gnus-summary-clear-local-variables))
6732         (set-buffer gnus-group-buffer)
6733         (gnus-summary-clear-local-variables)
6734         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
6735           (gnus-summary-clear-local-variables))
6736         (gnus-kill-buffer gnus-summary-buffer))
6737       (unless gnus-single-article-buffer
6738         (setq gnus-article-current nil))
6739       (when gnus-use-trees
6740         (gnus-tree-close group))
6741       (gnus-async-prefetch-remove-group group)
6742       (when (get-buffer gnus-article-buffer)
6743         (bury-buffer gnus-article-buffer))
6744       ;; Return to the group buffer.
6745       (gnus-configure-windows 'group 'force)
6746       ;; Clear the current group name.
6747       (setq gnus-newsgroup-name nil)
6748       (unless (gnus-ephemeral-group-p group)
6749         (gnus-group-update-group group))
6750       (when (equal (gnus-group-group-name) group)
6751         (gnus-group-next-unread-group 1))
6752       (when quit-config
6753         (gnus-handle-ephemeral-exit quit-config)))))
6754
6755 (defun gnus-handle-ephemeral-exit (quit-config)
6756   "Handle movement when leaving an ephemeral group.
6757 The state which existed when entering the ephemeral is reset."
6758   (if (not (buffer-name (car quit-config)))
6759       (gnus-configure-windows 'group 'force)
6760     (set-buffer (car quit-config))
6761     (cond ((eq major-mode 'gnus-summary-mode)
6762            (gnus-set-global-variables))
6763           ((eq major-mode 'gnus-article-mode)
6764            (save-excursion
6765              ;; The `gnus-summary-buffer' variable may point
6766              ;; to the old summary buffer when using a single
6767              ;; article buffer.
6768              (unless (gnus-buffer-live-p gnus-summary-buffer)
6769                (set-buffer gnus-group-buffer))
6770              (set-buffer gnus-summary-buffer)
6771              (gnus-set-global-variables))))
6772     (if (or (eq (cdr quit-config) 'article)
6773             (eq (cdr quit-config) 'pick))
6774         (progn
6775           ;; The current article may be from the ephemeral group
6776           ;; thus it is best that we reload this article
6777           ;;
6778           ;; If we're exiting from a large digest, this can be
6779           ;; extremely slow.  So, it's better not to reload it. -- jh.
6780           ;;(gnus-summary-show-article)
6781           (if (and (boundp 'gnus-pick-mode) (symbol-value 'gnus-pick-mode))
6782               (gnus-configure-windows 'pick 'force)
6783             (gnus-configure-windows (cdr quit-config) 'force)))
6784       (gnus-configure-windows (cdr quit-config) 'force))
6785     (when (eq major-mode 'gnus-summary-mode)
6786       (gnus-summary-next-subject 1 nil t)
6787       (gnus-summary-recenter)
6788       (gnus-summary-position-point))))
6789
6790 ;;; Dead summaries.
6791
6792 (defvar gnus-dead-summary-mode-map nil)
6793
6794 (unless gnus-dead-summary-mode-map
6795   (setq gnus-dead-summary-mode-map (make-keymap))
6796   (suppress-keymap gnus-dead-summary-mode-map)
6797   (substitute-key-definition
6798    'undefined 'gnus-summary-wake-up-the-dead gnus-dead-summary-mode-map)
6799   (dolist (key '("\C-d" "\r" "\177" [delete]))
6800     (define-key gnus-dead-summary-mode-map
6801       key 'gnus-summary-wake-up-the-dead))
6802   (dolist (key '("q" "Q"))
6803     (define-key gnus-dead-summary-mode-map key 'bury-buffer)))
6804
6805 (defvar gnus-dead-summary-mode nil
6806   "Minor mode for Gnus summary buffers.")
6807
6808 (defun gnus-dead-summary-mode (&optional arg)
6809   "Minor mode for Gnus summary buffers."
6810   (interactive "P")
6811   (when (eq major-mode 'gnus-summary-mode)
6812     (make-local-variable 'gnus-dead-summary-mode)
6813     (setq gnus-dead-summary-mode
6814           (if (null arg) (not gnus-dead-summary-mode)
6815             (> (prefix-numeric-value arg) 0)))
6816     (when gnus-dead-summary-mode
6817       (gnus-add-minor-mode
6818        'gnus-dead-summary-mode " Dead" gnus-dead-summary-mode-map))))
6819
6820 (defun gnus-deaden-summary ()
6821   "Make the current summary buffer into a dead summary buffer."
6822   ;; Kill any previous dead summary buffer.
6823   (when (and gnus-dead-summary
6824              (buffer-name gnus-dead-summary))
6825     (save-excursion
6826       (set-buffer gnus-dead-summary)
6827       (when gnus-dead-summary-mode
6828         (kill-buffer (current-buffer)))))
6829   ;; Make this the current dead summary.
6830   (setq gnus-dead-summary (current-buffer))
6831   (gnus-dead-summary-mode 1)
6832   (let ((name (buffer-name)))
6833     (when (string-match "Summary" name)
6834       (rename-buffer
6835        (concat (substring name 0 (match-beginning 0)) "Dead "
6836                (substring name (match-beginning 0)))
6837        t)
6838       (bury-buffer))))
6839
6840 (defun gnus-kill-or-deaden-summary (buffer)
6841   "Kill or deaden the summary BUFFER."
6842   (save-excursion
6843     (when (and (buffer-name buffer)
6844                (not gnus-single-article-buffer))
6845       (save-excursion
6846         (set-buffer buffer)
6847         (gnus-kill-buffer gnus-article-buffer)
6848         (gnus-kill-buffer gnus-original-article-buffer)))
6849     (cond
6850      ;; Kill the buffer.
6851      (gnus-kill-summary-on-exit
6852       (when (and gnus-use-trees
6853                  (gnus-buffer-exists-p buffer))
6854         (save-excursion
6855           (set-buffer buffer)
6856           (gnus-tree-close gnus-newsgroup-name)))
6857       (gnus-kill-buffer buffer))
6858      ;; Deaden the buffer.
6859      ((gnus-buffer-exists-p buffer)
6860       (save-excursion
6861         (set-buffer buffer)
6862         (gnus-deaden-summary))))))
6863
6864 (defun gnus-summary-wake-up-the-dead (&rest args)
6865   "Wake up the dead summary buffer."
6866   (interactive)
6867   (gnus-dead-summary-mode -1)
6868   (let ((name (buffer-name)))
6869     (when (string-match "Dead " name)
6870       (rename-buffer
6871        (concat (substring name 0 (match-beginning 0))
6872                (substring name (match-end 0)))
6873        t)))
6874   (gnus-message 3 "This dead summary is now alive again"))
6875
6876 ;; Suggested by Andrew Eskilsson <pi92ae@pt.hk-r.se>.
6877 (defun gnus-summary-fetch-faq (&optional faq-dir)
6878   "Fetch the FAQ for the current group.
6879 If FAQ-DIR (the prefix), prompt for a directory to search for the faq
6880 in."
6881   (interactive
6882    (list
6883     (when current-prefix-arg
6884       (completing-read
6885        "FAQ dir: " (and (listp gnus-group-faq-directory)
6886                         (mapcar (lambda (file) (list file))
6887                                 gnus-group-faq-directory))))))
6888   (let (gnus-faq-buffer)
6889     (when (setq gnus-faq-buffer
6890                 (gnus-group-fetch-faq gnus-newsgroup-name faq-dir))
6891       (gnus-configure-windows 'summary-faq))))
6892
6893 ;; Suggested by Per Abrahamsen <amanda@iesd.auc.dk>.
6894 (defun gnus-summary-describe-group (&optional force)
6895   "Describe the current newsgroup."
6896   (interactive "P")
6897   (gnus-group-describe-group force gnus-newsgroup-name))
6898
6899 (defun gnus-summary-describe-briefly ()
6900   "Describe summary mode commands briefly."
6901   (interactive)
6902   (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")))
6903
6904 ;; Walking around group mode buffer from summary mode.
6905
6906 (defun gnus-summary-next-group (&optional no-article target-group backward)
6907   "Exit current newsgroup and then select next unread newsgroup.
6908 If prefix argument NO-ARTICLE is non-nil, no article is selected
6909 initially.  If TARGET-GROUP, go to this group.  If BACKWARD, go to
6910 previous group instead."
6911   (interactive "P")
6912   ;; Stop pre-fetching.
6913   (gnus-async-halt-prefetch)
6914   (let ((current-group gnus-newsgroup-name)
6915         (current-buffer (current-buffer))
6916         entered)
6917     ;; First we semi-exit this group to update Xrefs and all variables.
6918     ;; We can't do a real exit, because the window conf must remain
6919     ;; the same in case the user is prompted for info, and we don't
6920     ;; want the window conf to change before that...
6921     (gnus-summary-exit t)
6922     (while (not entered)
6923       ;; Then we find what group we are supposed to enter.
6924       (set-buffer gnus-group-buffer)
6925       (gnus-group-jump-to-group current-group)
6926       (setq target-group
6927             (or target-group
6928                 (if (eq gnus-keep-same-level 'best)
6929                     (gnus-summary-best-group gnus-newsgroup-name)
6930                   (gnus-summary-search-group backward gnus-keep-same-level))))
6931       (if (not target-group)
6932           ;; There are no further groups, so we return to the group
6933           ;; buffer.
6934           (progn
6935             (gnus-message 5 "Returning to the group buffer")
6936             (setq entered t)
6937             (when (gnus-buffer-live-p current-buffer)
6938               (set-buffer current-buffer)
6939               (gnus-summary-exit))
6940             (gnus-run-hooks 'gnus-group-no-more-groups-hook))
6941         ;; We try to enter the target group.
6942         (gnus-group-jump-to-group target-group)
6943         (let ((unreads (gnus-group-group-unread)))
6944           (if (and (or (eq t unreads)
6945                        (and unreads (not (zerop unreads))))
6946                    (gnus-summary-read-group
6947                     target-group nil no-article
6948                     (and (buffer-name current-buffer) current-buffer)
6949                     nil backward))
6950               (setq entered t)
6951             (setq current-group target-group
6952                   target-group nil)))))))
6953
6954 (defun gnus-summary-prev-group (&optional no-article)
6955   "Exit current newsgroup and then select previous unread newsgroup.
6956 If prefix argument NO-ARTICLE is non-nil, no article is selected initially."
6957   (interactive "P")
6958   (gnus-summary-next-group no-article nil t))
6959
6960 ;; Walking around summary lines.
6961
6962 (defun gnus-summary-first-subject (&optional unread undownloaded unseen)
6963   "Go to the first subject satisfying any non-nil constraint.
6964 If UNREAD is non-nil, the article should be unread.
6965 If UNDOWNLOADED is non-nil, the article should be undownloaded.
6966 If UNSEEN is non-nil, the article should be unseen.
6967 Returns the article selected or nil if there are no matching articles."
6968   (interactive "P")
6969   (cond
6970    ;; Empty summary.
6971    ((null gnus-newsgroup-data)
6972     (gnus-message 3 "No articles in the group")
6973     nil)
6974    ;; Pick the first article.
6975    ((not (or unread undownloaded unseen))
6976     (goto-char (gnus-data-pos (car gnus-newsgroup-data)))
6977     (gnus-data-number (car gnus-newsgroup-data)))
6978    ;; Find the first unread article.
6979    (t
6980     (let ((data gnus-newsgroup-data))
6981       (while (and data
6982                   (let ((num (gnus-data-number (car data))))
6983                     (or (memq num gnus-newsgroup-unfetched)
6984                         (not (or (and unread
6985                                       (memq num gnus-newsgroup-unreads))
6986                                  (and undownloaded
6987                                       (memq num gnus-newsgroup-undownloaded))
6988                                  (and unseen
6989                                       (memq num gnus-newsgroup-unseen)))))))
6990         (setq data (cdr data)))
6991       (prog1
6992           (if data
6993               (progn
6994                 (goto-char (gnus-data-pos (car data)))
6995                 (gnus-data-number (car data)))
6996             (gnus-message 3 "No more%s articles"
6997                           (let* ((r (when unread " unread"))
6998                                  (d (when undownloaded " undownloaded"))
6999                                  (s (when unseen " unseen"))
7000                                  (l (delq nil (list r d s))))
7001                             (cond ((= 3 (length l))
7002                                    (concat r "," d ", or" s))
7003                                   ((= 2 (length l))
7004                                    (concat (car l) ", or" (cadr l)))
7005                                   ((= 1 (length l))
7006                                    (car l))
7007                                   (t
7008                                    ""))))
7009             nil
7010             )
7011         (gnus-summary-position-point))))))
7012
7013 (defun gnus-summary-next-subject (n &optional unread dont-display)
7014   "Go to next N'th summary line.
7015 If N is negative, go to the previous N'th subject line.
7016 If UNREAD is non-nil, only unread articles are selected.
7017 The difference between N and the actual number of steps taken is
7018 returned."
7019   (interactive "p")
7020   (let ((backward (< n 0))
7021         (n (abs n)))
7022     (while (and (> n 0)
7023                 (if backward
7024                     (gnus-summary-find-prev unread)
7025                   (gnus-summary-find-next unread)))
7026       (unless (zerop (setq n (1- n)))
7027         (gnus-summary-show-thread)))
7028     (when (/= 0 n)
7029       (gnus-message 7 "No more%s articles"
7030                     (if unread " unread" "")))
7031     (unless dont-display
7032       (gnus-summary-recenter)
7033       (gnus-summary-position-point))
7034     n))
7035
7036 (defun gnus-summary-next-unread-subject (n)
7037   "Go to next N'th unread summary line."
7038   (interactive "p")
7039   (gnus-summary-next-subject n t))
7040
7041 (defun gnus-summary-prev-subject (n &optional unread)
7042   "Go to previous N'th summary line.
7043 If optional argument UNREAD is non-nil, only unread article is selected."
7044   (interactive "p")
7045   (gnus-summary-next-subject (- n) unread))
7046
7047 (defun gnus-summary-prev-unread-subject (n)
7048   "Go to previous N'th unread summary line."
7049   (interactive "p")
7050   (gnus-summary-next-subject (- n) t))
7051
7052 (defun gnus-summary-goto-subjects (articles)
7053   "Insert the subject header for ARTICLES in the current buffer."
7054   (save-excursion
7055     (dolist (article articles)
7056       (gnus-summary-goto-subject article t)))
7057   (gnus-summary-limit (append articles gnus-newsgroup-limit))
7058   (gnus-summary-position-point))
7059
7060 (defun gnus-summary-goto-subject (article &optional force silent)
7061   "Go the subject line of ARTICLE.
7062 If FORCE, also allow jumping to articles not currently shown."
7063   (interactive "nArticle number: ")
7064   (unless (numberp article)
7065     (error "Article %s is not a number" article))
7066   (let ((b (point))
7067         (data (gnus-data-find article)))
7068     ;; We read in the article if we have to.
7069     (and (not data)
7070          force
7071          (gnus-summary-insert-subject
7072           article
7073           (if (or (numberp force) (vectorp force)) force)
7074           t)
7075          (setq data (gnus-data-find article)))
7076     (goto-char b)
7077     (if (not data)
7078         (progn
7079           (unless silent
7080             (gnus-message 3 "Can't find article %d" article))
7081           nil)
7082       (let ((pt (gnus-data-pos data)))
7083         (goto-char pt)
7084         (gnus-summary-set-article-display-arrow pt))
7085       (gnus-summary-position-point)
7086       article)))
7087
7088 ;; Walking around summary lines with displaying articles.
7089
7090 (defun gnus-summary-expand-window (&optional arg)
7091   "Make the summary buffer take up the entire Emacs frame.
7092 Given a prefix, will force an `article' buffer configuration."
7093   (interactive "P")
7094   (if arg
7095       (gnus-configure-windows 'article 'force)
7096     (gnus-configure-windows 'summary 'force)))
7097
7098 (defun gnus-summary-display-article (article &optional all-header)
7099   "Display ARTICLE in article buffer."
7100   (when (gnus-buffer-live-p gnus-article-buffer)
7101     (with-current-buffer gnus-article-buffer
7102       (mm-enable-multibyte)))
7103   (gnus-set-global-variables)
7104   (when (gnus-buffer-live-p gnus-article-buffer)
7105     (with-current-buffer gnus-article-buffer
7106       (setq gnus-article-charset gnus-newsgroup-charset)
7107       (setq gnus-article-ignored-charsets gnus-newsgroup-ignored-charsets)
7108       (mm-enable-multibyte)))
7109   (if (null article)
7110       nil
7111     (prog1
7112         (if gnus-summary-display-article-function
7113             (funcall gnus-summary-display-article-function article all-header)
7114           (gnus-article-prepare article all-header))
7115       (gnus-run-hooks 'gnus-select-article-hook)
7116       (when (and gnus-current-article
7117                  (not (zerop gnus-current-article)))
7118         (gnus-summary-goto-subject gnus-current-article))
7119       (gnus-summary-recenter)
7120       (when (and gnus-use-trees gnus-show-threads)
7121         (gnus-possibly-generate-tree article)
7122         (gnus-highlight-selected-tree article))
7123       ;; Successfully display article.
7124       (gnus-article-set-window-start
7125        (cdr (assq article gnus-newsgroup-bookmarks))))))
7126
7127 (defun gnus-summary-select-article (&optional all-headers force pseudo article)
7128   "Select the current article.
7129 If ALL-HEADERS is non-nil, show all header fields.  If FORCE is
7130 non-nil, the article will be re-fetched even if it already present in
7131 the article buffer.  If PSEUDO is non-nil, pseudo-articles will also
7132 be displayed."
7133   ;; Make sure we are in the summary buffer to work around bbdb bug.
7134   (unless (eq major-mode 'gnus-summary-mode)
7135     (set-buffer gnus-summary-buffer))
7136   (let ((article (or article (gnus-summary-article-number)))
7137         (all-headers (not (not all-headers))) ;Must be t or nil.
7138         gnus-summary-display-article-function)
7139     (and (not pseudo)
7140          (gnus-summary-article-pseudo-p article)
7141          (error "This is a pseudo-article"))
7142     (save-excursion
7143       (set-buffer gnus-summary-buffer)
7144       (if (or (and gnus-single-article-buffer
7145                    (or (null gnus-current-article)
7146                        (null gnus-article-current)
7147                        (null (get-buffer gnus-article-buffer))
7148                        (not (eq article (cdr gnus-article-current)))
7149                        (not (equal (car gnus-article-current)
7150                                    gnus-newsgroup-name))))
7151               (and (not gnus-single-article-buffer)
7152                    (or (null gnus-current-article)
7153                        (not (eq gnus-current-article article))))
7154               force)
7155           ;; The requested article is different from the current article.
7156           (progn
7157             (gnus-summary-display-article article all-headers)
7158             (when (gnus-buffer-live-p gnus-article-buffer)
7159               (with-current-buffer gnus-article-buffer
7160                 (if (not gnus-article-decoded-p) ;; a local variable
7161                     (mm-disable-multibyte))))
7162             (gnus-article-set-window-start
7163              (cdr (assq article gnus-newsgroup-bookmarks)))
7164             article)
7165         'old))))
7166
7167 (defun gnus-summary-force-verify-and-decrypt ()
7168   "Display buttons for signed/encrypted parts and verify/decrypt them."
7169   (interactive)
7170   (let ((mm-verify-option 'known)
7171         (mm-decrypt-option 'known)
7172         (gnus-article-emulate-mime t)
7173         (gnus-buttonized-mime-types (append (list "multipart/signed"
7174                                                   "multipart/encrypted")
7175                                             gnus-buttonized-mime-types)))
7176     (gnus-summary-select-article nil 'force)))
7177
7178 (defun gnus-summary-set-current-mark (&optional current-mark)
7179   "Obsolete function."
7180   nil)
7181
7182 (defun gnus-summary-next-article (&optional unread subject backward push)
7183   "Select the next article.
7184 If UNREAD, only unread articles are selected.
7185 If SUBJECT, only articles with SUBJECT are selected.
7186 If BACKWARD, the previous article is selected instead of the next."
7187   (interactive "P")
7188   (cond
7189    ;; Is there such an article?
7190    ((and (gnus-summary-search-forward unread subject backward)
7191          (or (gnus-summary-display-article (gnus-summary-article-number))
7192              (eq (gnus-summary-article-mark) gnus-canceled-mark)))
7193     (gnus-summary-position-point))
7194    ;; If not, we try the first unread, if that is wanted.
7195    ((and subject
7196          gnus-auto-select-same
7197          (gnus-summary-first-unread-article))
7198     (gnus-summary-position-point)
7199     (gnus-message 6 "Wrapped"))
7200    ;; Try to get next/previous article not displayed in this group.
7201    ((and gnus-auto-extend-newsgroup
7202          (not unread) (not subject))
7203     (gnus-summary-goto-article
7204      (if backward (1- gnus-newsgroup-begin) (1+ gnus-newsgroup-end))
7205      nil (count-lines (point-min) (point))))
7206    ;; Go to next/previous group.
7207    (t
7208     (unless (gnus-ephemeral-group-p gnus-newsgroup-name)
7209       (gnus-summary-jump-to-group gnus-newsgroup-name))
7210     (let ((cmd last-command-char)
7211           (point
7212            (save-excursion
7213              (set-buffer gnus-group-buffer)
7214              (point)))
7215           (group
7216            (if (eq gnus-keep-same-level 'best)
7217                (gnus-summary-best-group gnus-newsgroup-name)
7218              (gnus-summary-search-group backward gnus-keep-same-level))))
7219       ;; For some reason, the group window gets selected.  We change
7220       ;; it back.
7221       (select-window (get-buffer-window (current-buffer)))
7222       ;; Select next unread newsgroup automagically.
7223       (cond
7224        ((or (not gnus-auto-select-next)
7225             (not cmd))
7226         (gnus-message 7 "No more%s articles" (if unread " unread" "")))
7227        ((or (eq gnus-auto-select-next 'quietly)
7228             (and (eq gnus-auto-select-next 'slightly-quietly)
7229                  push)
7230             (and (eq gnus-auto-select-next 'almost-quietly)
7231                  (gnus-summary-last-article-p)))
7232         ;; Select quietly.
7233         (if (gnus-ephemeral-group-p gnus-newsgroup-name)
7234             (gnus-summary-exit)
7235           (gnus-message 7 "No more%s articles (%s)..."
7236                         (if unread " unread" "")
7237                         (if group (concat "selecting " group)
7238                           "exiting"))
7239           (gnus-summary-next-group nil group backward)))
7240        (t
7241         (when (gnus-key-press-event-p last-input-event)
7242           (gnus-summary-walk-group-buffer
7243            gnus-newsgroup-name cmd unread backward point))))))))
7244
7245 (defun gnus-summary-walk-group-buffer (from-group cmd unread backward start)
7246   (let ((keystrokes '((?\C-n (gnus-group-next-unread-group 1))
7247                       (?\C-p (gnus-group-prev-unread-group 1))))
7248         (cursor-in-echo-area t)
7249         keve key group ended prompt)
7250     (save-excursion
7251       (set-buffer gnus-group-buffer)
7252       (goto-char start)
7253       (setq group
7254             (if (eq gnus-keep-same-level 'best)
7255                 (gnus-summary-best-group gnus-newsgroup-name)
7256               (gnus-summary-search-group backward gnus-keep-same-level))))
7257     (while (not ended)
7258       (setq prompt
7259             (format
7260              "No more%s articles%s " (if unread " unread" "")
7261              (if (and group
7262                       (not (gnus-ephemeral-group-p gnus-newsgroup-name)))
7263                  (format " (Type %s for %s [%s])"
7264                          (single-key-description cmd)
7265                          (gnus-group-decoded-name group)
7266                          (car (gnus-gethash group gnus-newsrc-hashtb)))
7267                (format " (Type %s to exit %s)"
7268                        (single-key-description cmd)
7269                        (gnus-group-decoded-name gnus-newsgroup-name)))))
7270       ;; Confirm auto selection.
7271       (setq key (car (setq keve (gnus-read-event-char prompt)))
7272             ended t)
7273       (cond
7274        ((assq key keystrokes)
7275         (let ((obuf (current-buffer)))
7276           (switch-to-buffer gnus-group-buffer)
7277           (when group
7278             (gnus-group-jump-to-group group))
7279           (eval (cadr (assq key keystrokes)))
7280           (setq group (gnus-group-group-name))
7281           (switch-to-buffer obuf))
7282         (setq ended nil))
7283        ((equal key cmd)
7284         (if (or (not group)
7285                 (gnus-ephemeral-group-p gnus-newsgroup-name))
7286             (gnus-summary-exit)
7287           (gnus-summary-next-group nil group backward)))
7288        (t
7289         (push (cdr keve) unread-command-events))))))
7290
7291 (defun gnus-summary-next-unread-article ()
7292   "Select unread article after current one."
7293   (interactive)
7294   (gnus-summary-next-article
7295    (or (not (eq gnus-summary-goto-unread 'never))
7296        (gnus-summary-last-article-p (gnus-summary-article-number)))
7297    (and gnus-auto-select-same
7298         (gnus-summary-article-subject))))
7299
7300 (defun gnus-summary-prev-article (&optional unread subject)
7301   "Select the article after the current one.
7302 If UNREAD is non-nil, only unread articles are selected."
7303   (interactive "P")
7304   (gnus-summary-next-article unread subject t))
7305
7306 (defun gnus-summary-prev-unread-article ()
7307   "Select unread article before current one."
7308   (interactive)
7309   (gnus-summary-prev-article
7310    (or (not (eq gnus-summary-goto-unread 'never))
7311        (gnus-summary-first-article-p (gnus-summary-article-number)))
7312    (and gnus-auto-select-same
7313         (gnus-summary-article-subject))))
7314
7315 (defun gnus-summary-next-page (&optional lines circular stop)
7316   "Show next page of the selected article.
7317 If at the end of the current article, select the next article.
7318 LINES says how many lines should be scrolled up.
7319
7320 If CIRCULAR is non-nil, go to the start of the article instead of
7321 selecting the next article when reaching the end of the current
7322 article.
7323
7324 If STOP is non-nil, just stop when reaching the end of the message.
7325
7326 Also see the variable `gnus-article-skip-boring'."
7327   (interactive "P")
7328   (setq gnus-summary-buffer (current-buffer))
7329   (gnus-set-global-variables)
7330   (let ((article (gnus-summary-article-number))
7331         (article-window (get-buffer-window gnus-article-buffer t))
7332         endp)
7333     ;; If the buffer is empty, we have no article.
7334     (unless article
7335       (error "No article to select"))
7336     (gnus-configure-windows 'article)
7337     (if (eq (cdr (assq article gnus-newsgroup-reads)) gnus-canceled-mark)
7338         (if (and (eq gnus-summary-goto-unread 'never)
7339                  (not (gnus-summary-last-article-p article)))
7340             (gnus-summary-next-article)
7341           (gnus-summary-next-unread-article))
7342       (if (or (null gnus-current-article)
7343               (null gnus-article-current)
7344               (/= article (cdr gnus-article-current))
7345               (not (equal (car gnus-article-current) gnus-newsgroup-name)))
7346           ;; Selected subject is different from current article's.
7347           (gnus-summary-display-article article)
7348         (when article-window
7349           (gnus-eval-in-buffer-window gnus-article-buffer
7350             (setq endp (or (gnus-article-next-page lines)
7351                            (gnus-article-only-boring-p))))
7352           (when endp
7353             (cond (stop
7354                    (gnus-message 3 "End of message"))
7355                   (circular
7356                    (gnus-summary-beginning-of-article))
7357                   (lines
7358                    (gnus-message 3 "End of message"))
7359                   ((null lines)
7360                    (if (and (eq gnus-summary-goto-unread 'never)
7361                             (not (gnus-summary-last-article-p article)))
7362                        (gnus-summary-next-article)
7363                      (gnus-summary-next-unread-article))))))))
7364     (gnus-summary-recenter)
7365     (gnus-summary-position-point)))
7366
7367 (defun gnus-summary-prev-page (&optional lines move)
7368   "Show previous page of selected article.
7369 Argument LINES specifies lines to be scrolled down.
7370 If MOVE, move to the previous unread article if point is at
7371 the beginning of the buffer."
7372   (interactive "P")
7373   (let ((article (gnus-summary-article-number))
7374         (article-window (get-buffer-window gnus-article-buffer t))
7375         endp)
7376     (gnus-configure-windows 'article)
7377     (if (or (null gnus-current-article)
7378             (null gnus-article-current)
7379             (/= article (cdr gnus-article-current))
7380             (not (equal (car gnus-article-current) gnus-newsgroup-name)))
7381         ;; Selected subject is different from current article's.
7382         (gnus-summary-display-article article)
7383       (gnus-summary-recenter)
7384       (when article-window
7385         (gnus-eval-in-buffer-window gnus-article-buffer
7386           (setq endp (gnus-article-prev-page lines)))
7387         (when (and move endp)
7388           (cond (lines
7389                  (gnus-message 3 "Beginning of message"))
7390                 ((null lines)
7391                  (if (and (eq gnus-summary-goto-unread 'never)
7392                           (not (gnus-summary-first-article-p article)))
7393                      (gnus-summary-prev-article)
7394                    (gnus-summary-prev-unread-article))))))))
7395   (gnus-summary-position-point))
7396
7397 (defun gnus-summary-prev-page-or-article (&optional lines)
7398   "Show previous page of selected article.
7399 Argument LINES specifies lines to be scrolled down.
7400 If at the beginning of the article, go to the next article."
7401   (interactive "P")
7402   (gnus-summary-prev-page lines t))
7403
7404 (defun gnus-summary-scroll-up (lines)
7405   "Scroll up (or down) one line current article.
7406 Argument LINES specifies lines to be scrolled up (or down if negative)."
7407   (interactive "p")
7408   (gnus-configure-windows 'article)
7409   (gnus-summary-show-thread)
7410   (when (eq (gnus-summary-select-article nil nil 'pseudo) 'old)
7411     (gnus-eval-in-buffer-window gnus-article-buffer
7412       (cond ((> lines 0)
7413              (when (gnus-article-next-page lines)
7414                (gnus-message 3 "End of message")))
7415             ((< lines 0)
7416              (gnus-article-prev-page (- lines))))))
7417   (gnus-summary-recenter)
7418   (gnus-summary-position-point))
7419
7420 (defun gnus-summary-scroll-down (lines)
7421   "Scroll down (or up) one line current article.
7422 Argument LINES specifies lines to be scrolled down (or up if negative)."
7423   (interactive "p")
7424   (gnus-summary-scroll-up (- lines)))
7425
7426 (defun gnus-summary-next-same-subject ()
7427   "Select next article which has the same subject as current one."
7428   (interactive)
7429   (gnus-summary-next-article nil (gnus-summary-article-subject)))
7430
7431 (defun gnus-summary-prev-same-subject ()
7432   "Select previous article which has the same subject as current one."
7433   (interactive)
7434   (gnus-summary-prev-article nil (gnus-summary-article-subject)))
7435
7436 (defun gnus-summary-next-unread-same-subject ()
7437   "Select next unread article which has the same subject as current one."
7438   (interactive)
7439   (gnus-summary-next-article t (gnus-summary-article-subject)))
7440
7441 (defun gnus-summary-prev-unread-same-subject ()
7442   "Select previous unread article which has the same subject as current one."
7443   (interactive)
7444   (gnus-summary-prev-article t (gnus-summary-article-subject)))
7445
7446 (defun gnus-summary-first-unread-article ()
7447   "Select the first unread article.
7448 Return nil if there are no unread articles."
7449   (interactive)
7450   (prog1
7451       (when (gnus-summary-first-subject t)
7452         (gnus-summary-show-thread)
7453         (gnus-summary-first-subject t)
7454         (gnus-summary-display-article (gnus-summary-article-number)))
7455     (gnus-summary-position-point)))
7456
7457 (defun gnus-summary-first-unread-subject ()
7458   "Place the point on the subject line of the first unread article.
7459 Return nil if there are no unread articles."
7460   (interactive)
7461   (prog1
7462       (when (gnus-summary-first-subject t)
7463         (gnus-summary-show-thread)
7464         (gnus-summary-first-subject t))
7465     (gnus-summary-position-point)))
7466
7467 (defun gnus-summary-first-unseen-subject ()
7468   "Place the point on the subject line of the first unseen article.
7469 Return nil if there are no unseen articles."
7470   (interactive)
7471   (prog1
7472       (when (gnus-summary-first-subject nil nil t)
7473         (gnus-summary-show-thread)
7474         (gnus-summary-first-subject nil nil t))
7475     (gnus-summary-position-point)))
7476
7477 (defun gnus-summary-first-unseen-or-unread-subject ()
7478   "Place the point on the subject line of the first unseen article or,
7479 if all article have been seen, on the subject line of the first unread
7480 article."
7481   (interactive)
7482   (prog1
7483       (unless (when (gnus-summary-first-subject nil nil t)
7484                 (gnus-summary-show-thread)
7485                 (gnus-summary-first-subject nil nil t))
7486         (when (gnus-summary-first-subject t)
7487           (gnus-summary-show-thread)
7488           (gnus-summary-first-subject t)))
7489     (gnus-summary-position-point)))
7490
7491 (defun gnus-summary-first-article ()
7492   "Select the first article.
7493 Return nil if there are no articles."
7494   (interactive)
7495   (prog1
7496       (when (gnus-summary-first-subject)
7497         (gnus-summary-show-thread)
7498         (gnus-summary-first-subject)
7499         (gnus-summary-display-article (gnus-summary-article-number)))
7500     (gnus-summary-position-point)))
7501
7502 (defun gnus-summary-best-unread-article (&optional arg)
7503   "Select the unread article with the highest score.
7504 If given a prefix argument, select the next unread article that has a
7505 score higher than the default score."
7506   (interactive "P")
7507   (let ((article (if arg
7508                      (gnus-summary-better-unread-subject)
7509                    (gnus-summary-best-unread-subject))))
7510     (if article
7511         (gnus-summary-goto-article article)
7512       (error "No unread articles"))))
7513
7514 (defun gnus-summary-best-unread-subject ()
7515   "Select the unread subject with the highest score."
7516   (interactive)
7517   (let ((best -1000000)
7518         (data gnus-newsgroup-data)
7519         article score)
7520     (while data
7521       (and (gnus-data-unread-p (car data))
7522            (> (setq score
7523                     (gnus-summary-article-score (gnus-data-number (car data))))
7524               best)
7525            (setq best score
7526                  article (gnus-data-number (car data))))
7527       (setq data (cdr data)))
7528     (when article
7529       (gnus-summary-goto-subject article))
7530     (gnus-summary-position-point)
7531     article))
7532
7533 (defun gnus-summary-better-unread-subject ()
7534   "Select the first unread subject that has a score over the default score."
7535   (interactive)
7536   (let ((data gnus-newsgroup-data)
7537         article score)
7538     (while (and (setq article (gnus-data-number (car data)))
7539                 (or (gnus-data-read-p (car data))
7540                     (not (> (gnus-summary-article-score article)
7541                             gnus-summary-default-score))))
7542       (setq data (cdr data)))
7543     (when article
7544       (gnus-summary-goto-subject article))
7545     (gnus-summary-position-point)
7546     article))
7547
7548 (defun gnus-summary-last-subject ()
7549   "Go to the last displayed subject line in the group."
7550   (let ((article (gnus-data-number (car (gnus-data-list t)))))
7551     (when article
7552       (gnus-summary-goto-subject article))))
7553
7554 (defun gnus-summary-goto-article (article &optional all-headers force)
7555   "Fetch ARTICLE (article number or Message-ID) and display it if it exists.
7556 If ALL-HEADERS is non-nil, no header lines are hidden.
7557 If FORCE, go to the article even if it isn't displayed.  If FORCE
7558 is a number, it is the line the article is to be displayed on."
7559   (interactive
7560    (list
7561     (completing-read
7562      "Article number or Message-ID: "
7563      (mapcar (lambda (number) (list (int-to-string number)))
7564              gnus-newsgroup-limit))
7565     current-prefix-arg
7566     t))
7567   (prog1
7568       (if (and (stringp article)
7569                (string-match "@\\|%40" article))
7570           (gnus-summary-refer-article article)
7571         (when (stringp article)
7572           (setq article (string-to-number article)))
7573         (if (gnus-summary-goto-subject article force)
7574             (gnus-summary-display-article article all-headers)
7575           (gnus-message 4 "Couldn't go to article %s" article) nil))
7576     (gnus-summary-position-point)))
7577
7578 (defun gnus-summary-goto-last-article ()
7579   "Go to the previously read article."
7580   (interactive)
7581   (prog1
7582       (when gnus-last-article
7583         (gnus-summary-goto-article gnus-last-article nil t))
7584     (gnus-summary-position-point)))
7585
7586 (defun gnus-summary-pop-article (number)
7587   "Pop one article off the history and go to the previous.
7588 NUMBER articles will be popped off."
7589   (interactive "p")
7590   (let (to)
7591     (setq gnus-newsgroup-history
7592           (cdr (setq to (nthcdr number gnus-newsgroup-history))))
7593     (if to
7594         (gnus-summary-goto-article (car to) nil t)
7595       (error "Article history empty")))
7596   (gnus-summary-position-point))
7597
7598 ;; Summary commands and functions for limiting the summary buffer.
7599
7600 (defun gnus-summary-limit-to-articles (n)
7601   "Limit the summary buffer to the next N articles.
7602 If not given a prefix, use the process marked articles instead."
7603   (interactive "P")
7604   (prog1
7605       (let ((articles (gnus-summary-work-articles n)))
7606         (setq gnus-newsgroup-processable nil)
7607         (gnus-summary-limit articles))
7608     (gnus-summary-position-point)))
7609
7610 (defun gnus-summary-pop-limit (&optional total)
7611   "Restore the previous limit.
7612 If given a prefix, remove all limits."
7613   (interactive "P")
7614   (when total
7615     (setq gnus-newsgroup-limits
7616           (list (mapcar (lambda (h) (mail-header-number h))
7617                         gnus-newsgroup-headers))))
7618   (unless gnus-newsgroup-limits
7619     (error "No limit to pop"))
7620   (prog1
7621       (gnus-summary-limit nil 'pop)
7622     (gnus-summary-position-point)))
7623
7624 (defun gnus-summary-limit-to-subject (subject &optional header not-matching)
7625   "Limit the summary buffer to articles that have subjects that match a regexp.
7626 If NOT-MATCHING, excluding articles that have subjects that match a regexp."
7627   (interactive
7628    (list (read-string (if current-prefix-arg
7629                           "Exclude subject (regexp): "
7630                         "Limit to subject (regexp): "))
7631          nil current-prefix-arg))
7632   (unless header
7633     (setq header "subject"))
7634   (when (not (equal "" subject))
7635     (prog1
7636         (let ((articles (gnus-summary-find-matching
7637                          (or header "subject") subject 'all nil nil
7638                          not-matching)))
7639           (unless articles
7640             (error "Found no matches for \"%s\"" subject))
7641           (gnus-summary-limit articles))
7642       (gnus-summary-position-point))))
7643
7644 (defun gnus-summary-limit-to-author (from &optional not-matching)
7645   "Limit the summary buffer to articles that have authors that match a regexp.
7646 If NOT-MATCHING, excluding articles that have authors that match a regexp."
7647   (interactive
7648    (list (read-string (if current-prefix-arg
7649                           "Exclude author (regexp): "
7650                         "Limit to author (regexp): "))
7651          current-prefix-arg))
7652   (gnus-summary-limit-to-subject from "from" not-matching))
7653
7654 (defun gnus-summary-limit-to-age (age &optional younger-p)
7655   "Limit the summary buffer to articles that are older than (or equal) AGE days.
7656 If YOUNGER-P (the prefix) is non-nil, limit the summary buffer to
7657 articles that are younger than AGE days."
7658   (interactive
7659    (let ((younger current-prefix-arg)
7660          (days-got nil)
7661          days)
7662      (while (not days-got)
7663        (setq days (if younger
7664                       (read-string "Limit to articles younger than (in days, older when negative): ")
7665                     (read-string
7666                      "Limit to articles older than (in days, younger when negative): ")))
7667        (when (> (length days) 0)
7668          (setq days (read days)))
7669        (if (numberp days)
7670            (progn
7671              (setq days-got t)
7672              (if (< days 0)
7673                  (progn
7674                    (setq younger (not younger))
7675                    (setq days (* days -1)))))
7676          (message "Please enter a number.")
7677          (sleep-for 1)))
7678      (list days younger)))
7679   (prog1
7680       (let ((data gnus-newsgroup-data)
7681             (cutoff (days-to-time age))
7682             articles d date is-younger)
7683         (while (setq d (pop data))
7684           (when (and (vectorp (gnus-data-header d))
7685                      (setq date (mail-header-date (gnus-data-header d))))
7686             (setq is-younger (time-less-p
7687                               (time-since (condition-case ()
7688                                               (date-to-time date)
7689                                             (error '(0 0))))
7690                               cutoff))
7691             (when (if younger-p
7692                       is-younger
7693                     (not is-younger))
7694               (push (gnus-data-number d) articles))))
7695         (gnus-summary-limit (nreverse articles)))
7696     (gnus-summary-position-point)))
7697
7698 (defun gnus-summary-limit-to-extra (header regexp &optional not-matching)
7699   "Limit the summary buffer to articles that match an 'extra' header."
7700   (interactive
7701    (let ((header
7702           (intern
7703            (gnus-completing-read-with-default
7704             (symbol-name (car gnus-extra-headers))
7705             (if current-prefix-arg
7706                 "Exclude extra header"
7707               "Limit extra header")
7708             (mapcar (lambda (x)
7709                       (cons (symbol-name x) x))
7710                     gnus-extra-headers)
7711             nil
7712             t))))
7713      (list header
7714            (read-string (format "%s header %s (regexp): "
7715                                 (if current-prefix-arg "Exclude" "Limit to")
7716                                 header))
7717            current-prefix-arg)))
7718   (when (not (equal "" regexp))
7719     (prog1
7720         (let ((articles (gnus-summary-find-matching
7721                          (cons 'extra header) regexp 'all nil nil
7722                          not-matching)))
7723           (unless articles
7724             (error "Found no matches for \"%s\"" regexp))
7725           (gnus-summary-limit articles))
7726       (gnus-summary-position-point))))
7727
7728 (defun gnus-summary-limit-to-display-predicate ()
7729   "Limit the summary buffer to the predicated in the `display' group parameter."
7730   (interactive)
7731   (unless gnus-newsgroup-display
7732     (error "There is no `display' group parameter"))
7733   (let (articles)
7734     (dolist (number gnus-newsgroup-articles)
7735       (when (funcall gnus-newsgroup-display)
7736         (push number articles)))
7737     (gnus-summary-limit articles))
7738   (gnus-summary-position-point))
7739
7740 (defalias 'gnus-summary-delete-marked-as-read 'gnus-summary-limit-to-unread)
7741 (make-obsolete
7742  'gnus-summary-delete-marked-as-read 'gnus-summary-limit-to-unread)
7743
7744 (defun gnus-summary-limit-to-unread (&optional all)
7745   "Limit the summary buffer to articles that are not marked as read.
7746 If ALL is non-nil, limit strictly to unread articles."
7747   (interactive "P")
7748   (if all
7749       (gnus-summary-limit-to-marks (char-to-string gnus-unread-mark))
7750     (gnus-summary-limit-to-marks
7751      ;; Concat all the marks that say that an article is read and have
7752      ;; those removed.
7753      (list gnus-del-mark gnus-read-mark gnus-ancient-mark
7754            gnus-killed-mark gnus-spam-mark gnus-kill-file-mark
7755            gnus-low-score-mark gnus-expirable-mark
7756            gnus-canceled-mark gnus-catchup-mark gnus-sparse-mark
7757            gnus-duplicate-mark gnus-souped-mark)
7758      'reverse)))
7759
7760 (defalias 'gnus-summary-delete-marked-with 'gnus-summary-limit-exclude-marks)
7761 (make-obsolete 'gnus-summary-delete-marked-with
7762                'gnus-summary-limit-exclude-marks)
7763
7764 (defun gnus-summary-limit-exclude-marks (marks &optional reverse)
7765   "Exclude articles that are marked with MARKS (e.g. \"DK\").
7766 If REVERSE, limit the summary buffer to articles that are marked
7767 with MARKS.  MARKS can either be a string of marks or a list of marks.
7768 Returns how many articles were removed."
7769   (interactive "sMarks: ")
7770   (gnus-summary-limit-to-marks marks t))
7771
7772 (defun gnus-summary-limit-to-marks (marks &optional reverse)
7773   "Limit the summary buffer to articles that are marked with MARKS (e.g. \"DK\").
7774 If REVERSE (the prefix), limit the summary buffer to articles that are
7775 not marked with MARKS.  MARKS can either be a string of marks or a
7776 list of marks.
7777 Returns how many articles were removed."
7778   (interactive "sMarks: \nP")
7779   (prog1
7780       (let ((data gnus-newsgroup-data)
7781             (marks (if (listp marks) marks
7782                      (append marks nil))) ; Transform to list.
7783             articles)
7784         (while data
7785           (when (if reverse (not (memq (gnus-data-mark (car data)) marks))
7786                   (memq (gnus-data-mark (car data)) marks))
7787             (push (gnus-data-number (car data)) articles))
7788           (setq data (cdr data)))
7789         (gnus-summary-limit articles))
7790     (gnus-summary-position-point)))
7791
7792 (defun gnus-summary-limit-to-score (score)
7793   "Limit to articles with score at or above SCORE."
7794   (interactive "NLimit to articles with score of at least: ")
7795   (let ((data gnus-newsgroup-data)
7796         articles)
7797     (while data
7798       (when (>= (gnus-summary-article-score (gnus-data-number (car data)))
7799                 score)
7800         (push (gnus-data-number (car data)) articles))
7801       (setq data (cdr data)))
7802     (prog1
7803         (gnus-summary-limit articles)
7804       (gnus-summary-position-point))))
7805
7806 (defun gnus-summary-limit-to-unseen ()
7807   "Limit to unseen articles."
7808   (interactive)
7809   (prog1
7810       (gnus-summary-limit gnus-newsgroup-unseen)
7811     (gnus-summary-position-point)))
7812
7813 (defun gnus-summary-limit-include-thread (id)
7814   "Display all the hidden articles that is in the thread with ID in it.
7815 When called interactively, ID is the Message-ID of the current
7816 article."
7817   (interactive (list (mail-header-id (gnus-summary-article-header))))
7818   (let ((articles (gnus-articles-in-thread
7819                    (gnus-id-to-thread (gnus-root-id id)))))
7820     (prog1
7821         (gnus-summary-limit (nconc articles gnus-newsgroup-limit))
7822       (gnus-summary-limit-include-matching-articles
7823        "subject"
7824        (regexp-quote (gnus-simplify-subject-re
7825                       (mail-header-subject (gnus-id-to-header id)))))
7826       (gnus-summary-position-point))))
7827
7828 (defun gnus-summary-limit-include-matching-articles (header regexp)
7829   "Display all the hidden articles that have HEADERs that match REGEXP."
7830   (interactive (list (read-string "Match on header: ")
7831                      (read-string "Regexp: ")))
7832   (let ((articles (gnus-find-matching-articles header regexp)))
7833     (prog1
7834         (gnus-summary-limit (nconc articles gnus-newsgroup-limit))
7835       (gnus-summary-position-point))))
7836
7837 (defun gnus-summary-insert-dormant-articles ()
7838   "Insert all the dormant articles for this group into the current buffer."
7839   (interactive)
7840   (let ((gnus-verbose (max 6 gnus-verbose)))
7841     (if (not gnus-newsgroup-dormant)
7842         (gnus-message 3 "No cached articles for this group")
7843       (gnus-summary-goto-subjects gnus-newsgroup-dormant))))
7844
7845 (defun gnus-summary-limit-include-dormant ()
7846   "Display all the hidden articles that are marked as dormant.
7847 Note that this command only works on a subset of the articles currently
7848 fetched for this group."
7849   (interactive)
7850   (unless gnus-newsgroup-dormant
7851     (error "There are no dormant articles in this group"))
7852   (prog1
7853       (gnus-summary-limit (append gnus-newsgroup-dormant gnus-newsgroup-limit))
7854     (gnus-summary-position-point)))
7855
7856 (defun gnus-summary-limit-exclude-dormant ()
7857   "Hide all dormant articles."
7858   (interactive)
7859   (prog1
7860       (gnus-summary-limit-to-marks (list gnus-dormant-mark) 'reverse)
7861     (gnus-summary-position-point)))
7862
7863 (defun gnus-summary-limit-exclude-childless-dormant ()
7864   "Hide all dormant articles that have no children."
7865   (interactive)
7866   (let ((data (gnus-data-list t))
7867         articles d children)
7868     ;; Find all articles that are either not dormant or have
7869     ;; children.
7870     (while (setq d (pop data))
7871       (when (or (not (= (gnus-data-mark d) gnus-dormant-mark))
7872                 (and (setq children
7873                            (gnus-article-children (gnus-data-number d)))
7874                      (let (found)
7875                        (while children
7876                          (when (memq (car children) articles)
7877                            (setq children nil
7878                                  found t))
7879                          (pop children))
7880                        found)))
7881         (push (gnus-data-number d) articles)))
7882     ;; Do the limiting.
7883     (prog1
7884         (gnus-summary-limit articles)
7885       (gnus-summary-position-point))))
7886
7887 (defun gnus-summary-limit-mark-excluded-as-read (&optional all)
7888   "Mark all unread excluded articles as read.
7889 If ALL, mark even excluded ticked and dormants as read."
7890   (interactive "P")
7891   (setq gnus-newsgroup-limit (sort gnus-newsgroup-limit '<))
7892   (let ((articles (gnus-sorted-ndifference
7893                    (sort
7894                     (mapcar (lambda (h) (mail-header-number h))
7895                             gnus-newsgroup-headers)
7896                     '<)
7897                    gnus-newsgroup-limit))
7898         article)
7899     (setq gnus-newsgroup-unreads
7900           (gnus-sorted-intersection gnus-newsgroup-unreads
7901                                     gnus-newsgroup-limit))
7902     (if all
7903         (setq gnus-newsgroup-dormant nil
7904               gnus-newsgroup-marked nil
7905               gnus-newsgroup-reads
7906               (nconc
7907                (mapcar (lambda (n) (cons n gnus-catchup-mark)) articles)
7908                gnus-newsgroup-reads))
7909       (while (setq article (pop articles))
7910         (unless (or (memq article gnus-newsgroup-dormant)
7911                     (memq article gnus-newsgroup-marked))
7912           (push (cons article gnus-catchup-mark) gnus-newsgroup-reads))))))
7913
7914 (defun gnus-summary-limit (articles &optional pop)
7915   (if pop
7916       ;; We pop the previous limit off the stack and use that.
7917       (setq articles (car gnus-newsgroup-limits)
7918             gnus-newsgroup-limits (cdr gnus-newsgroup-limits))
7919     ;; We use the new limit, so we push the old limit on the stack.
7920     (push gnus-newsgroup-limit gnus-newsgroup-limits))
7921   ;; Set the limit.
7922   (setq gnus-newsgroup-limit articles)
7923   (let ((total (length gnus-newsgroup-data))
7924         (data (gnus-data-find-list (gnus-summary-article-number)))
7925         (gnus-summary-mark-below nil)   ; Inhibit this.
7926         found)
7927     ;; This will do all the work of generating the new summary buffer
7928     ;; according to the new limit.
7929     (gnus-summary-prepare)
7930     ;; Hide any threads, possibly.
7931     (gnus-summary-maybe-hide-threads)
7932     ;; Try to return to the article you were at, or one in the
7933     ;; neighborhood.
7934     (when data
7935       ;; We try to find some article after the current one.
7936       (while data
7937         (when (gnus-summary-goto-subject (gnus-data-number (car data)) nil t)
7938           (setq data nil
7939                 found t))
7940         (setq data (cdr data))))
7941     (unless found
7942       ;; If there is no data, that means that we were after the last
7943       ;; article.  The same goes when we can't find any articles
7944       ;; after the current one.
7945       (goto-char (point-max))
7946       (gnus-summary-find-prev))
7947     (gnus-set-mode-line 'summary)
7948     ;; We return how many articles were removed from the summary
7949     ;; buffer as a result of the new limit.
7950     (- total (length gnus-newsgroup-data))))
7951
7952 (defsubst gnus-invisible-cut-children (threads)
7953   (let ((num 0))
7954     (while threads
7955       (when (memq (mail-header-number (caar threads)) gnus-newsgroup-limit)
7956         (incf num))
7957       (pop threads))
7958     (< num 2)))
7959
7960 (defsubst gnus-cut-thread (thread)
7961   "Go forwards in the thread until we find an article that we want to display."
7962   (when (or (eq gnus-fetch-old-headers 'some)
7963             (eq gnus-fetch-old-headers 'invisible)
7964             (numberp gnus-fetch-old-headers)
7965             (eq gnus-build-sparse-threads 'some)
7966             (eq gnus-build-sparse-threads 'more))
7967     ;; Deal with old-fetched headers and sparse threads.
7968     (while (and
7969             thread
7970             (or
7971              (gnus-summary-article-sparse-p (mail-header-number (car thread)))
7972              (gnus-summary-article-ancient-p
7973               (mail-header-number (car thread))))
7974             (if (or (<= (length (cdr thread)) 1)
7975                     (eq gnus-fetch-old-headers 'invisible))
7976                 (setq gnus-newsgroup-limit
7977                       (delq (mail-header-number (car thread))
7978                             gnus-newsgroup-limit)
7979                       thread (cadr thread))
7980               (when (gnus-invisible-cut-children (cdr thread))
7981                 (let ((th (cdr thread)))
7982                   (while th
7983                     (if (memq (mail-header-number (caar th))
7984                               gnus-newsgroup-limit)
7985                         (setq thread (car th)
7986                               th nil)
7987                       (setq th (cdr th))))))))))
7988   thread)
7989
7990 (defun gnus-cut-threads (threads)
7991   "Cut off all uninteresting articles from the beginning of THREADS."
7992   (when (or (eq gnus-fetch-old-headers 'some)
7993             (eq gnus-fetch-old-headers 'invisible)
7994             (numberp gnus-fetch-old-headers)
7995             (eq gnus-build-sparse-threads 'some)
7996             (eq gnus-build-sparse-threads 'more))
7997     (let ((th threads))
7998       (while th
7999         (setcar th (gnus-cut-thread (car th)))
8000         (setq th (cdr th)))))
8001   ;; Remove nixed out threads.
8002   (delq nil threads))
8003
8004 (defun gnus-summary-initial-limit (&optional show-if-empty)
8005   "Figure out what the initial limit is supposed to be on group entry.
8006 This entails weeding out unwanted dormants, low-scored articles,
8007 fetch-old-headers verbiage, and so on."
8008   ;; Most groups have nothing to remove.
8009   (if (or gnus-inhibit-limiting
8010           (and (null gnus-newsgroup-dormant)
8011                (eq gnus-newsgroup-display 'gnus-not-ignore)
8012                (not (eq gnus-fetch-old-headers 'some))
8013                (not (numberp gnus-fetch-old-headers))
8014                (not (eq gnus-fetch-old-headers 'invisible))
8015                (null gnus-summary-expunge-below)
8016                (not (eq gnus-build-sparse-threads 'some))
8017                (not (eq gnus-build-sparse-threads 'more))
8018                (null gnus-thread-expunge-below)
8019                (not gnus-use-nocem)))
8020       ()                                ; Do nothing.
8021     (push gnus-newsgroup-limit gnus-newsgroup-limits)
8022     (setq gnus-newsgroup-limit nil)
8023     (mapatoms
8024      (lambda (node)
8025        (unless (car (symbol-value node))
8026          ;; These threads have no parents -- they are roots.
8027          (let ((nodes (cdr (symbol-value node)))
8028                thread)
8029            (while nodes
8030              (if (and gnus-thread-expunge-below
8031                       (< (gnus-thread-total-score (car nodes))
8032                          gnus-thread-expunge-below))
8033                  (gnus-expunge-thread (pop nodes))
8034                (setq thread (pop nodes))
8035                (gnus-summary-limit-children thread))))))
8036      gnus-newsgroup-dependencies)
8037     ;; If this limitation resulted in an empty group, we might
8038     ;; pop the previous limit and use it instead.
8039     (when (and (not gnus-newsgroup-limit)
8040                show-if-empty)
8041       (setq gnus-newsgroup-limit (pop gnus-newsgroup-limits)))
8042     gnus-newsgroup-limit))
8043
8044 (defun gnus-summary-limit-children (thread)
8045   "Return 1 if this subthread is visible and 0 if it is not."
8046   ;; First we get the number of visible children to this thread.  This
8047   ;; is done by recursing down the thread using this function, so this
8048   ;; will really go down to a leaf article first, before slowly
8049   ;; working its way up towards the root.
8050   (when thread
8051     (let* ((max-lisp-eval-depth 5000)
8052            (children
8053            (if (cdr thread)
8054                (apply '+ (mapcar 'gnus-summary-limit-children
8055                                  (cdr thread)))
8056              0))
8057           (number (mail-header-number (car thread)))
8058           score)
8059       (if (and
8060            (not (memq number gnus-newsgroup-marked))
8061            (or
8062             ;; If this article is dormant and has absolutely no visible
8063             ;; children, then this article isn't visible.
8064             (and (memq number gnus-newsgroup-dormant)
8065                  (zerop children))
8066             ;; If this is "fetch-old-headered" and there is no
8067             ;; visible children, then we don't want this article.
8068             (and (or (eq gnus-fetch-old-headers 'some)
8069                      (numberp gnus-fetch-old-headers))
8070                  (gnus-summary-article-ancient-p number)
8071                  (zerop children))
8072             ;; If this is "fetch-old-headered" and `invisible', then
8073             ;; we don't want this article.
8074             (and (eq gnus-fetch-old-headers 'invisible)
8075                  (gnus-summary-article-ancient-p number))
8076             ;; If this is a sparsely inserted article with no children,
8077             ;; we don't want it.
8078             (and (eq gnus-build-sparse-threads 'some)
8079                  (gnus-summary-article-sparse-p number)
8080                  (zerop children))
8081             ;; If we use expunging, and this article is really
8082             ;; low-scored, then we don't want this article.
8083             (when (and gnus-summary-expunge-below
8084                        (< (setq score
8085                                 (or (cdr (assq number gnus-newsgroup-scored))
8086                                     gnus-summary-default-score))
8087                           gnus-summary-expunge-below))
8088               ;; We increase the expunge-tally here, but that has
8089               ;; nothing to do with the limits, really.
8090               (incf gnus-newsgroup-expunged-tally)
8091               ;; We also mark as read here, if that's wanted.
8092               (when (and gnus-summary-mark-below
8093                          (< score gnus-summary-mark-below))
8094                 (setq gnus-newsgroup-unreads
8095                       (delq number gnus-newsgroup-unreads))
8096                 (if gnus-newsgroup-auto-expire
8097                     (push number gnus-newsgroup-expirable)
8098                   (push (cons number gnus-low-score-mark)
8099                         gnus-newsgroup-reads)))
8100               t)
8101             ;; Do the `display' group parameter.
8102             (and gnus-newsgroup-display
8103                  (not (funcall gnus-newsgroup-display)))
8104             ;; Check NoCeM things.
8105             (if (and gnus-use-nocem
8106                      (gnus-nocem-unwanted-article-p
8107                       (mail-header-id (car thread))))
8108                 (progn
8109                   (setq gnus-newsgroup-unreads
8110                         (delq number gnus-newsgroup-unreads))
8111                   t))))
8112           ;; Nope, invisible article.
8113           0
8114         ;; Ok, this article is to be visible, so we add it to the limit
8115         ;; and return 1.
8116         (push number gnus-newsgroup-limit)
8117         1))))
8118
8119 (defun gnus-expunge-thread (thread)
8120   "Mark all articles in THREAD as read."
8121   (let* ((number (mail-header-number (car thread))))
8122     (incf gnus-newsgroup-expunged-tally)
8123     ;; We also mark as read here, if that's wanted.
8124     (setq gnus-newsgroup-unreads
8125           (delq number gnus-newsgroup-unreads))
8126     (if gnus-newsgroup-auto-expire
8127         (push number gnus-newsgroup-expirable)
8128       (push (cons number gnus-low-score-mark)
8129             gnus-newsgroup-reads)))
8130   ;; Go recursively through all subthreads.
8131   (mapcar 'gnus-expunge-thread (cdr thread)))
8132
8133 ;; Summary article oriented commands
8134
8135 (defun gnus-summary-refer-parent-article (n)
8136   "Refer parent article N times.
8137 If N is negative, go to ancestor -N instead.
8138 The difference between N and the number of articles fetched is returned."
8139   (interactive "p")
8140   (let ((skip 1)
8141         error header ref)
8142     (when (not (natnump n))
8143       (setq skip (abs n)
8144             n 1))
8145     (while (and (> n 0)
8146                 (not error))
8147       (setq header (gnus-summary-article-header))
8148       (if (and (eq (mail-header-number header)
8149                    (cdr gnus-article-current))
8150                (equal gnus-newsgroup-name
8151                       (car gnus-article-current)))
8152           ;; If we try to find the parent of the currently
8153           ;; displayed article, then we take a look at the actual
8154           ;; References header, since this is slightly more
8155           ;; reliable than the References field we got from the
8156           ;; server.
8157           (save-excursion
8158             (set-buffer gnus-original-article-buffer)
8159             (nnheader-narrow-to-headers)
8160             (unless (setq ref (message-fetch-field "references"))
8161               (when (setq ref (message-fetch-field "in-reply-to"))
8162                 (setq ref (gnus-extract-message-id-from-in-reply-to ref))))
8163             (widen))
8164         (setq ref
8165               ;; It's not the current article, so we take a bet on
8166               ;; the value we got from the server.
8167               (mail-header-references header)))
8168       (if (and ref
8169                (not (equal ref "")))
8170           (unless (gnus-summary-refer-article (gnus-parent-id ref skip))
8171             (gnus-message 1 "Couldn't find parent"))
8172         (gnus-message 1 "No references in article %d"
8173                       (gnus-summary-article-number))
8174         (setq error t))
8175       (decf n))
8176     (gnus-summary-position-point)
8177     n))
8178
8179 (defun gnus-summary-refer-references ()
8180   "Fetch all articles mentioned in the References header.
8181 Return the number of articles fetched."
8182   (interactive)
8183   (let ((ref (mail-header-references (gnus-summary-article-header)))
8184         (current (gnus-summary-article-number))
8185         (n 0))
8186     (if (or (not ref)
8187             (equal ref ""))
8188         (error "No References in the current article")
8189       ;; For each Message-ID in the References header...
8190       (while (string-match "<[^>]*>" ref)
8191         (incf n)
8192         ;; ... fetch that article.
8193         (gnus-summary-refer-article
8194          (prog1 (match-string 0 ref)
8195            (setq ref (substring ref (match-end 0))))))
8196       (gnus-summary-goto-subject current)
8197       (gnus-summary-position-point)
8198       n)))
8199
8200 (defun gnus-summary-refer-thread (&optional limit)
8201   "Fetch all articles in the current thread.
8202 If LIMIT (the numerical prefix), fetch that many old headers instead
8203 of what's specified by the `gnus-refer-thread-limit' variable."
8204   (interactive "P")
8205   (let ((id (mail-header-id (gnus-summary-article-header)))
8206         (limit (if limit (prefix-numeric-value limit)
8207                  gnus-refer-thread-limit)))
8208     (unless (eq gnus-fetch-old-headers 'invisible)
8209       (gnus-message 5 "Fetching headers for %s..." gnus-newsgroup-name)
8210       ;; Retrieve the headers and read them in.
8211       (if (eq (if (numberp limit)
8212                   (gnus-retrieve-headers
8213                    (list (min
8214                           (+ (mail-header-number
8215                               (gnus-summary-article-header))
8216                              limit)
8217                           gnus-newsgroup-end))
8218                    gnus-newsgroup-name (* limit 2))
8219                 ;; gnus-refer-thread-limit is t, i.e. fetch _all_
8220                 ;; headers.
8221                 (gnus-retrieve-headers (list gnus-newsgroup-end)
8222                                        gnus-newsgroup-name limit))
8223               'nov)
8224           (gnus-build-all-threads)
8225         (error "Can't fetch thread from back ends that don't support NOV"))
8226       (gnus-message 5 "Fetching headers for %s...done" gnus-newsgroup-name))
8227     (gnus-summary-limit-include-thread id)))
8228
8229 (defun gnus-summary-refer-article (message-id)
8230   "Fetch an article specified by MESSAGE-ID."
8231   (interactive "sMessage-ID: ")
8232   (when (and (stringp message-id)
8233              (not (zerop (length message-id))))
8234     (setq message-id (gnus-replace-in-string message-id " " ""))
8235     ;; Construct the correct Message-ID if necessary.
8236     ;; Suggested by tale@pawl.rpi.edu.
8237     (unless (string-match "^<" message-id)
8238       (setq message-id (concat "<" message-id)))
8239     (unless (string-match ">$" message-id)
8240       (setq message-id (concat message-id ">")))
8241     ;; People often post MIDs from URLs, so unhex it:
8242     (unless (string-match "@" message-id)
8243       (setq message-id (gnus-url-unhex-string message-id)))
8244     (let* ((header (gnus-id-to-header message-id))
8245            (sparse (and header
8246                         (gnus-summary-article-sparse-p
8247                          (mail-header-number header))
8248                         (memq (mail-header-number header)
8249                               gnus-newsgroup-limit)))
8250            number)
8251       (cond
8252        ;; If the article is present in the buffer we just go to it.
8253        ((and header
8254              (or (not (gnus-summary-article-sparse-p
8255                        (mail-header-number header)))
8256                  sparse))
8257         (prog1
8258             (gnus-summary-goto-article
8259              (mail-header-number header) nil t)
8260           (when sparse
8261             (gnus-summary-update-article (mail-header-number header)))))
8262        (t
8263         ;; We fetch the article.
8264         (catch 'found
8265           (dolist (gnus-override-method (gnus-refer-article-methods))
8266             (when (and (gnus-check-server gnus-override-method)
8267                        ;; Fetch the header,
8268                        (setq number (gnus-summary-insert-subject message-id)))
8269               ;; and display the article.
8270               (gnus-summary-select-article nil nil nil number)
8271               (throw 'found t)))
8272           (gnus-message 3 "Couldn't fetch article %s" message-id)))))))
8273
8274 (defun gnus-refer-article-methods ()
8275   "Return a list of referable methods."
8276   (cond
8277    ;; No method, so we default to current and native.
8278    ((null gnus-refer-article-method)
8279     (list gnus-current-select-method gnus-select-method))
8280    ;; Current.
8281    ((eq 'current gnus-refer-article-method)
8282     (list gnus-current-select-method))
8283    ;; List of select methods.
8284    ((not (and (symbolp (car gnus-refer-article-method))
8285               (assq (car gnus-refer-article-method) nnoo-definition-alist)))
8286     (let (out)
8287       (dolist (method gnus-refer-article-method)
8288         (push (if (eq 'current method)
8289                   gnus-current-select-method
8290                 method)
8291               out))
8292       (nreverse out)))
8293    ;; One single select method.
8294    (t
8295     (list gnus-refer-article-method))))
8296
8297 (defun gnus-summary-edit-parameters ()
8298   "Edit the group parameters of the current group."
8299   (interactive)
8300   (gnus-group-edit-group gnus-newsgroup-name 'params))
8301
8302 (defun gnus-summary-customize-parameters ()
8303   "Customize the group parameters of the current group."
8304   (interactive)
8305   (gnus-group-customize gnus-newsgroup-name))
8306
8307 (defun gnus-summary-enter-digest-group (&optional force)
8308   "Enter an nndoc group based on the current article.
8309 If FORCE, force a digest interpretation.  If not, try
8310 to guess what the document format is."
8311   (interactive "P")
8312   (let ((conf gnus-current-window-configuration))
8313     (save-window-excursion
8314       (save-excursion
8315         (let (gnus-article-prepare-hook
8316               gnus-display-mime-function
8317               gnus-break-pages)
8318           (gnus-summary-select-article))))
8319     (setq gnus-current-window-configuration conf)
8320     (let* ((name (format "%s-%d"
8321                          (gnus-group-prefixed-name
8322                           gnus-newsgroup-name (list 'nndoc ""))
8323                          (save-excursion
8324                            (set-buffer gnus-summary-buffer)
8325                            gnus-current-article)))
8326            (ogroup gnus-newsgroup-name)
8327            (params (append (gnus-info-params (gnus-get-info ogroup))
8328                            (list (cons 'to-group ogroup))
8329                            (list (cons 'parent-group ogroup))
8330                            (list (cons 'save-article-group ogroup))))
8331            (case-fold-search t)
8332            (buf (current-buffer))
8333            dig to-address)
8334       (save-excursion
8335         (set-buffer gnus-original-article-buffer)
8336         ;; Have the digest group inherit the main mail address of
8337         ;; the parent article.
8338         (when (setq to-address (or (gnus-fetch-field "reply-to")
8339                                    (gnus-fetch-field "from")))
8340           (setq params (append
8341                         (list (cons 'to-address
8342                                     (funcall gnus-decode-encoded-word-function
8343                                              to-address))))))
8344         (setq dig (nnheader-set-temp-buffer " *gnus digest buffer*"))
8345         (insert-buffer-substring gnus-original-article-buffer)
8346         ;; Remove lines that may lead nndoc to misinterpret the
8347         ;; document type.
8348         (narrow-to-region
8349          (goto-char (point-min))
8350          (or (search-forward "\n\n" nil t) (point)))
8351         (goto-char (point-min))
8352         (delete-matching-lines "^Path:\\|^From ")
8353         (widen))
8354       (unwind-protect
8355           (if (let ((gnus-newsgroup-ephemeral-charset gnus-newsgroup-charset)
8356                     (gnus-newsgroup-ephemeral-ignored-charsets
8357                      gnus-newsgroup-ignored-charsets))
8358                 (gnus-group-read-ephemeral-group
8359                  name `(nndoc ,name (nndoc-address ,(get-buffer dig))
8360                               (nndoc-article-type
8361                                ,(if force 'mbox 'guess)))
8362                  t nil nil nil
8363                  `((adapt-file . ,(gnus-score-file-name gnus-newsgroup-name
8364                                                         "ADAPT")))))
8365               ;; Make all postings to this group go to the parent group.
8366               (nconc (gnus-info-params (gnus-get-info name))
8367                      params)
8368             ;; Couldn't select this doc group.
8369             (switch-to-buffer buf)
8370             (gnus-set-global-variables)
8371             (gnus-configure-windows 'summary)
8372             (gnus-message 3 "Article couldn't be entered?"))
8373         (kill-buffer dig)))))
8374
8375 (defun gnus-summary-read-document (n)
8376   "Open a new group based on the current article(s).
8377 This will allow you to read digests and other similar
8378 documents as newsgroups.
8379 Obeys the standard process/prefix convention."
8380   (interactive "P")
8381   (let* ((articles (gnus-summary-work-articles n))
8382          (ogroup gnus-newsgroup-name)
8383          (params (append (gnus-info-params (gnus-get-info ogroup))
8384                          (list (cons 'to-group ogroup))))
8385          article group egroup groups vgroup)
8386     (while (setq article (pop articles))
8387       (setq group (format "%s-%d" gnus-newsgroup-name article))
8388       (gnus-summary-remove-process-mark article)
8389       (when (gnus-summary-display-article article)
8390         (save-excursion
8391           (with-temp-buffer
8392             (insert-buffer-substring gnus-original-article-buffer)
8393             ;; Remove some headers that may lead nndoc to make
8394             ;; the wrong guess.
8395             (message-narrow-to-head)
8396             (goto-char (point-min))
8397             (delete-matching-lines "^\\(Path\\):\\|^From ")
8398             (widen)
8399             (if (setq egroup
8400                       (gnus-group-read-ephemeral-group
8401                        group `(nndoc ,group (nndoc-address ,(current-buffer))
8402                                      (nndoc-article-type guess))
8403                        t nil t))
8404                 (progn
8405             ;; Make all postings to this group go to the parent group.
8406                   (nconc (gnus-info-params (gnus-get-info egroup))
8407                          params)
8408                   (push egroup groups))
8409               ;; Couldn't select this doc group.
8410               (gnus-error 3 "Article couldn't be entered"))))))
8411     ;; Now we have selected all the documents.
8412     (cond
8413      ((not groups)
8414       (error "None of the articles could be interpreted as documents"))
8415      ((gnus-group-read-ephemeral-group
8416        (setq vgroup (format
8417                      "nnvirtual:%s-%s" gnus-newsgroup-name
8418                      (format-time-string "%Y%m%dT%H%M%S" (current-time))))
8419        `(nnvirtual ,vgroup (nnvirtual-component-groups ,groups))
8420        t
8421        (cons (current-buffer) 'summary)))
8422      (t
8423       (error "Couldn't select virtual nndoc group")))))
8424
8425 (defun gnus-summary-isearch-article (&optional regexp-p)
8426   "Do incremental search forward on the current article.
8427 If REGEXP-P (the prefix) is non-nil, do regexp isearch."
8428   (interactive "P")
8429   (gnus-summary-select-article)
8430   (gnus-configure-windows 'article)
8431   (gnus-eval-in-buffer-window gnus-article-buffer
8432     (save-restriction
8433       (widen)
8434       (isearch-forward regexp-p))))
8435
8436 (defun gnus-summary-search-article-forward (regexp &optional backward)
8437   "Search for an article containing REGEXP forward.
8438 If BACKWARD, search backward instead."
8439   (interactive
8440    (list (read-string
8441           (format "Search article %s (regexp%s): "
8442                   (if current-prefix-arg "backward" "forward")
8443                   (if gnus-last-search-regexp
8444                       (concat ", default " gnus-last-search-regexp)
8445                     "")))
8446          current-prefix-arg))
8447   (if (string-equal regexp "")
8448       (setq regexp (or gnus-last-search-regexp ""))
8449     (setq gnus-last-search-regexp regexp)
8450     (setq gnus-article-before-search gnus-current-article))
8451   ;; Intentionally set gnus-last-article.
8452   (setq gnus-last-article gnus-article-before-search)
8453   (let ((gnus-last-article gnus-last-article))
8454     (if (gnus-summary-search-article regexp backward)
8455         (gnus-summary-show-thread)
8456       (signal 'search-failed (list regexp)))))
8457
8458 (defun gnus-summary-search-article-backward (regexp)
8459   "Search for an article containing REGEXP backward."
8460   (interactive
8461    (list (read-string
8462           (format "Search article backward (regexp%s): "
8463                   (if gnus-last-search-regexp
8464                       (concat ", default " gnus-last-search-regexp)
8465                     "")))))
8466   (gnus-summary-search-article-forward regexp 'backward))
8467
8468 (defun gnus-summary-search-article (regexp &optional backward)
8469   "Search for an article containing REGEXP.
8470 Optional argument BACKWARD means do search for backward.
8471 `gnus-select-article-hook' is not called during the search."
8472   ;; We have to require this here to make sure that the following
8473   ;; dynamic binding isn't shadowed by autoloading.
8474   (require 'gnus-async)
8475   (require 'gnus-art)
8476   (let ((gnus-select-article-hook nil)  ;Disable hook.
8477         (gnus-article-prepare-hook nil)
8478         (gnus-mark-article-hook nil)    ;Inhibit marking as read.
8479         (gnus-use-article-prefetch nil)
8480         (gnus-xmas-force-redisplay nil) ;Inhibit XEmacs redisplay.
8481         (gnus-use-trees nil)            ;Inhibit updating tree buffer.
8482         (gnus-visual nil)
8483         (gnus-keep-backlog nil)
8484         (gnus-break-pages nil)
8485         (gnus-summary-display-arrow nil)
8486         (gnus-updated-mode-lines nil)
8487         (gnus-auto-center-summary nil)
8488         (sum (current-buffer))
8489         (gnus-display-mime-function nil)
8490         (found nil)
8491         point)
8492     (gnus-save-hidden-threads
8493       (gnus-summary-select-article)
8494       (set-buffer gnus-article-buffer)
8495       (goto-char (window-point (get-buffer-window (current-buffer))))
8496       (when backward
8497         (forward-line -1))
8498       (while (not found)
8499         (gnus-message 7 "Searching article: %d..." (cdr gnus-article-current))
8500         (if (if backward
8501                 (re-search-backward regexp nil t)
8502               (re-search-forward regexp nil t))
8503             ;; We found the regexp.
8504             (progn
8505               (setq found 'found)
8506               (beginning-of-line)
8507               (set-window-start
8508                (get-buffer-window (current-buffer))
8509                (point))
8510               (forward-line 1)
8511               (set-window-point
8512                (get-buffer-window (current-buffer))
8513                (point))
8514               (set-buffer sum)
8515               (setq point (point)))
8516           ;; We didn't find it, so we go to the next article.
8517           (set-buffer sum)
8518           (setq found 'not)
8519           (while (eq found 'not)
8520             (if (not (if backward (gnus-summary-find-prev)
8521                        (gnus-summary-find-next)))
8522                 ;; No more articles.
8523                 (setq found t)
8524               ;; Select the next article and adjust point.
8525               (unless (gnus-summary-article-sparse-p
8526                        (gnus-summary-article-number))
8527                 (setq found nil)
8528                 (gnus-summary-select-article)
8529                 (set-buffer gnus-article-buffer)
8530                 (widen)
8531                 (goto-char (if backward (point-max) (point-min))))))))
8532       (gnus-message 7 ""))
8533     ;; Return whether we found the regexp.
8534     (when (eq found 'found)
8535       (goto-char point)
8536       (gnus-summary-show-thread)
8537       (gnus-summary-goto-subject gnus-current-article)
8538       (gnus-summary-position-point)
8539       t)))
8540
8541 (defun gnus-find-matching-articles (header regexp)
8542   "Return a list of all articles that match REGEXP on HEADER.
8543 This search includes all articles in the current group that Gnus has
8544 fetched headers for, whether they are displayed or not."
8545   (let ((articles nil)
8546         (func `(lambda (h) (,(intern (concat "mail-header-" header)) h)))
8547         (case-fold-search t))
8548     (dolist (header gnus-newsgroup-headers)
8549       (when (string-match regexp (funcall func header))
8550         (push (mail-header-number header) articles)))
8551     (nreverse articles)))
8552
8553 (defun gnus-summary-find-matching (header regexp &optional backward unread
8554                                           not-case-fold not-matching)
8555   "Return a list of all articles that match REGEXP on HEADER.
8556 The search stars on the current article and goes forwards unless
8557 BACKWARD is non-nil.  If BACKWARD is `all', do all articles.
8558 If UNREAD is non-nil, only unread articles will
8559 be taken into consideration.  If NOT-CASE-FOLD, case won't be folded
8560 in the comparisons. If NOT-MATCHING, return a list of all articles that
8561 not match REGEXP on HEADER."
8562   (let ((case-fold-search (not not-case-fold))
8563         articles d func)
8564     (if (consp header)
8565         (if (eq (car header) 'extra)
8566             (setq func
8567                   `(lambda (h)
8568                      (or (cdr (assq ',(cdr header) (mail-header-extra h)))
8569                          "")))
8570           (error "%s is an invalid header" header))
8571       (unless (fboundp (intern (concat "mail-header-" header)))
8572         (error "%s is not a valid header" header))
8573       (setq func `(lambda (h) (,(intern (concat "mail-header-" header)) h))))
8574     (dolist (d (if (eq backward 'all)
8575                    gnus-newsgroup-data
8576                  (gnus-data-find-list
8577                   (gnus-summary-article-number)
8578                   (gnus-data-list backward))))
8579       (when (and (or (not unread)       ; We want all articles...
8580                      (gnus-data-unread-p d)) ; Or just unreads.
8581                  (vectorp (gnus-data-header d)) ; It's not a pseudo.
8582                  (if not-matching
8583                      (not (string-match
8584                            regexp
8585                            (funcall func (gnus-data-header d))))
8586                    (string-match regexp
8587                                  (funcall func (gnus-data-header d)))))
8588         (push (gnus-data-number d) articles))) ; Success!
8589     (nreverse articles)))
8590
8591 (defun gnus-summary-execute-command (header regexp command &optional backward)
8592   "Search forward for an article whose HEADER matches REGEXP and execute COMMAND.
8593 If HEADER is an empty string (or nil), the match is done on the entire
8594 article.  If BACKWARD (the prefix) is non-nil, search backward instead."
8595   (interactive
8596    (list (let ((completion-ignore-case t))
8597            (completing-read
8598             "Header name: "
8599             (mapcar (lambda (header) (list (format "%s" header)))
8600                     (append
8601                      '("Number" "Subject" "From" "Lines" "Date"
8602                        "Message-ID" "Xref" "References" "Body")
8603                      gnus-extra-headers))
8604             nil 'require-match))
8605          (read-string "Regexp: ")
8606          (read-key-sequence "Command: ")
8607          current-prefix-arg))
8608   (when (equal header "Body")
8609     (setq header ""))
8610   ;; Hidden thread subtrees must be searched as well.
8611   (gnus-summary-show-all-threads)
8612   ;; We don't want to change current point nor window configuration.
8613   (save-excursion
8614     (save-window-excursion
8615       (let (gnus-visual
8616             gnus-treat-strip-trailing-blank-lines
8617             gnus-treat-strip-leading-blank-lines
8618             gnus-treat-strip-multiple-blank-lines
8619             gnus-treat-hide-boring-headers
8620             gnus-treat-fold-newsgroups
8621             gnus-article-prepare-hook)
8622         (gnus-message 6 "Executing %s..." (key-description command))
8623         ;; We'd like to execute COMMAND interactively so as to give arguments.
8624         (gnus-execute header regexp
8625                       `(call-interactively ',(key-binding command))
8626                       backward)
8627         (gnus-message 6 "Executing %s...done" (key-description command))))))
8628
8629 (defun gnus-summary-beginning-of-article ()
8630   "Scroll the article back to the beginning."
8631   (interactive)
8632   (gnus-summary-select-article)
8633   (gnus-configure-windows 'article)
8634   (gnus-eval-in-buffer-window gnus-article-buffer
8635     (widen)
8636     (goto-char (point-min))
8637     (when gnus-break-pages
8638       (gnus-narrow-to-page))))
8639
8640 (defun gnus-summary-end-of-article ()
8641   "Scroll to the end of the article."
8642   (interactive)
8643   (gnus-summary-select-article)
8644   (gnus-configure-windows 'article)
8645   (gnus-eval-in-buffer-window gnus-article-buffer
8646     (widen)
8647     (goto-char (point-max))
8648     (recenter -3)
8649     (when gnus-break-pages
8650       (when (re-search-backward page-delimiter nil t)
8651         (narrow-to-region (match-end 0) (point-max)))
8652       (gnus-narrow-to-page))))
8653
8654 (defun gnus-summary-print-truncate-and-quote (string &optional len)
8655   "Truncate to LEN and quote all \"(\"'s in STRING."
8656   (gnus-replace-in-string (if (and len (> (length string) len))
8657                               (substring string 0 len)
8658                             string)
8659                           "[()]" "\\\\\\&"))
8660
8661 (defun gnus-summary-print-article (&optional filename n)
8662   "Generate and print a PostScript image of the process-marked (mail) articles.
8663
8664 If used interactively, print the current article if none are
8665 process-marked.  With prefix arg, prompt the user for the name of the
8666 file to save in.
8667
8668 When used from Lisp, accept two optional args FILENAME and N.  N means
8669 to print the next N articles.  If N is negative, print the N previous
8670 articles.  If N is nil and articles have been marked with the process
8671 mark, print these instead.
8672
8673 If the optional first argument FILENAME is nil, send the image to the
8674 printer.  If FILENAME is a string, save the PostScript image in a file with
8675 that name.  If FILENAME is a number, prompt the user for the name of the file
8676 to save in."
8677   (interactive (list (ps-print-preprint current-prefix-arg)))
8678   (dolist (article (gnus-summary-work-articles n))
8679     (gnus-summary-select-article nil nil 'pseudo article)
8680     (gnus-eval-in-buffer-window gnus-article-buffer
8681       (gnus-print-buffer))
8682     (gnus-summary-remove-process-mark article))
8683   (ps-despool filename))
8684
8685 (defun gnus-print-buffer ()
8686   (let ((buffer (generate-new-buffer " *print*")))
8687     (unwind-protect
8688         (progn
8689           (copy-to-buffer buffer (point-min) (point-max))
8690           (set-buffer buffer)
8691           (gnus-remove-text-with-property 'gnus-decoration)
8692           (when (gnus-visual-p 'article-highlight 'highlight)
8693             ;; Copy-to-buffer doesn't copy overlay.  So redo
8694             ;; highlight.
8695             (let ((gnus-article-buffer buffer))
8696               (gnus-article-highlight-citation t)
8697               (gnus-article-highlight-signature)
8698               (gnus-article-emphasize)
8699               (gnus-article-delete-invisible-text)))
8700           (let ((ps-left-header
8701                  (list
8702                   (concat "("
8703                           (gnus-summary-print-truncate-and-quote
8704                            (mail-header-subject gnus-current-headers)
8705                            66) ")")
8706                   (concat "("
8707                           (gnus-summary-print-truncate-and-quote
8708                            (mail-header-from gnus-current-headers)
8709                            45) ")")))
8710                 (ps-right-header
8711                  (list
8712                   "/pagenumberstring load"
8713                   (concat "("
8714                           (mail-header-date gnus-current-headers) ")"))))
8715             (gnus-run-hooks 'gnus-ps-print-hook)
8716             (save-excursion
8717               (if window-system
8718                   (ps-spool-buffer-with-faces)
8719                 (ps-spool-buffer)))))
8720       (kill-buffer buffer))))
8721
8722 (defun gnus-summary-show-article (&optional arg)
8723   "Force redisplaying of the current article.
8724 If ARG (the prefix) is a number, show the article with the charset
8725 defined in `gnus-summary-show-article-charset-alist', or the charset
8726 input.
8727 If ARG (the prefix) is non-nil and not a number, show the raw article
8728 without any article massaging functions being run.  Normally, the key
8729 strokes are `C-u g'."
8730   (interactive "P")
8731   (cond
8732    ((numberp arg)
8733     (gnus-summary-show-article t)
8734     (let ((gnus-newsgroup-charset
8735            (or (cdr (assq arg gnus-summary-show-article-charset-alist))
8736                (mm-read-coding-system
8737                 "View as charset: " ;; actually it is coding system.
8738                 (save-excursion
8739                   (set-buffer gnus-article-buffer)
8740                   (mm-detect-coding-region (point) (point-max))))))
8741           (gnus-newsgroup-ignored-charsets 'gnus-all))
8742       (gnus-summary-select-article nil 'force)
8743       (let ((deps gnus-newsgroup-dependencies)
8744             head header lines)
8745         (save-excursion
8746           (set-buffer gnus-original-article-buffer)
8747           (save-restriction
8748             (message-narrow-to-head)
8749             (setq head (buffer-string))
8750             (goto-char (point-min))
8751             (unless (re-search-forward "^lines:[ \t]\\([0-9]+\\)" nil t)
8752               (goto-char (point-max))
8753               (widen)
8754               (setq lines (1- (count-lines (point) (point-max))))))
8755           (with-temp-buffer
8756             (insert (format "211 %d Article retrieved.\n"
8757                             (cdr gnus-article-current)))
8758             (insert head)
8759             (if lines (insert (format "Lines: %d\n" lines)))
8760             (insert ".\n")
8761             (let ((nntp-server-buffer (current-buffer)))
8762               (setq header (car (gnus-get-newsgroup-headers deps t))))))
8763         (gnus-data-set-header
8764          (gnus-data-find (cdr gnus-article-current))
8765          header)
8766         (gnus-summary-update-article-line
8767          (cdr gnus-article-current) header)
8768         (when (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
8769           (gnus-summary-update-secondary-mark (cdr gnus-article-current))))))
8770    ((not arg)
8771     ;; Select the article the normal way.
8772     (gnus-summary-select-article nil 'force))
8773    (t
8774     ;; We have to require this here to make sure that the following
8775     ;; dynamic binding isn't shadowed by autoloading.
8776     (require 'gnus-async)
8777     (require 'gnus-art)
8778     ;; Bind the article treatment functions to nil.
8779     (let ((gnus-have-all-headers t)
8780           gnus-article-prepare-hook
8781           gnus-article-decode-hook
8782           gnus-display-mime-function
8783           gnus-break-pages)
8784       ;; Destroy any MIME parts.
8785       (when (gnus-buffer-live-p gnus-article-buffer)
8786         (save-excursion
8787           (set-buffer gnus-article-buffer)
8788           (mm-destroy-parts gnus-article-mime-handles)
8789           ;; Set it to nil for safety reason.
8790           (setq gnus-article-mime-handle-alist nil)
8791           (setq gnus-article-mime-handles nil)))
8792       (gnus-summary-select-article nil 'force))))
8793   (gnus-summary-goto-subject gnus-current-article)
8794   (gnus-summary-position-point))
8795
8796 (defun gnus-summary-show-raw-article ()
8797   "Show the raw article without any article massaging functions being run."
8798   (interactive)
8799   (gnus-summary-show-article t))
8800
8801 (defun gnus-summary-verbose-headers (&optional arg)
8802   "Toggle permanent full header display.
8803 If ARG is a positive number, turn header display on.
8804 If ARG is a negative number, turn header display off."
8805   (interactive "P")
8806   (setq gnus-show-all-headers
8807         (cond ((or (not (numberp arg))
8808                    (zerop arg))
8809                (not gnus-show-all-headers))
8810               ((natnump arg)
8811                t)))
8812   (gnus-summary-show-article))
8813
8814 (defun gnus-summary-toggle-header (&optional arg)
8815   "Show the headers if they are hidden, or hide them if they are shown.
8816 If ARG is a positive number, show the entire header.
8817 If ARG is a negative number, hide the unwanted header lines."
8818   (interactive "P")
8819   (let ((window (and (gnus-buffer-live-p gnus-article-buffer)
8820                      (get-buffer-window gnus-article-buffer t))))
8821     (with-current-buffer gnus-article-buffer
8822       (widen)
8823       (article-narrow-to-head)
8824       (let* ((buffer-read-only nil)
8825              (inhibit-point-motion-hooks t)
8826              (hidden (if (numberp arg)
8827                          (>= arg 0)
8828                        (or (not (looking-at "[^ \t\n]+:"))
8829                            (gnus-article-hidden-text-p 'headers))))
8830              s e)
8831         (delete-region (point-min) (point-max))
8832         (with-current-buffer gnus-original-article-buffer
8833           (goto-char (setq s (point-min)))
8834           (setq e (if (search-forward "\n\n" nil t)
8835                       (1- (point))
8836                     (point-max))))
8837         (insert-buffer-substring gnus-original-article-buffer s e)
8838         (run-hooks 'gnus-article-decode-hook)
8839         (if hidden
8840             (let ((gnus-treat-hide-headers nil)
8841                   (gnus-treat-hide-boring-headers nil))
8842               (gnus-delete-wash-type 'headers)
8843               (gnus-treat-article 'head))
8844           (gnus-treat-article 'head))
8845         (widen)
8846         (if window
8847             (set-window-start window (goto-char (point-min))))
8848         (if gnus-break-pages
8849             (gnus-narrow-to-page)
8850           (when (gnus-visual-p 'page-marker)
8851             (let ((buffer-read-only nil))
8852               (gnus-remove-text-with-property 'gnus-prev)
8853               (gnus-remove-text-with-property 'gnus-next))))
8854         (gnus-set-mode-line 'article)))))
8855
8856 (defun gnus-summary-show-all-headers ()
8857   "Make all header lines visible."
8858   (interactive)
8859   (gnus-summary-toggle-header 1))
8860
8861 (defun gnus-summary-caesar-message (&optional arg)
8862   "Caesar rotate the current article by 13.
8863 The numerical prefix specifies how many places to rotate each letter
8864 forward."
8865   (interactive "P")
8866   (gnus-summary-select-article)
8867   (let ((mail-header-separator ""))
8868     (gnus-eval-in-buffer-window gnus-article-buffer
8869       (save-restriction
8870         (widen)
8871         (let ((start (window-start))
8872               buffer-read-only)
8873           (message-caesar-buffer-body arg)
8874           (set-window-start (get-buffer-window (current-buffer)) start)))))
8875   ;; Create buttons and stuff...
8876   (gnus-treat-article nil))
8877
8878 (autoload 'unmorse-region "morse"
8879   "Convert morse coded text in region to ordinary ASCII text."
8880   t)
8881
8882 (defun gnus-summary-morse-message (&optional arg)
8883   "Morse decode the current article."
8884   (interactive "P")
8885   (gnus-summary-select-article)
8886   (let ((mail-header-separator ""))
8887     (gnus-eval-in-buffer-window gnus-article-buffer
8888       (save-excursion
8889         (save-restriction
8890           (widen)
8891           (let ((pos (window-start))
8892                 buffer-read-only)
8893             (goto-char (point-min))
8894             (when (message-goto-body)
8895               (gnus-narrow-to-body))
8896             (goto-char (point-min))
8897             (while (re-search-forward "·" (point-max) t)
8898               (replace-match "."))
8899             (unmorse-region (point-min) (point-max))
8900             (widen)
8901             (set-window-start (get-buffer-window (current-buffer)) pos)))))))
8902
8903 (defun gnus-summary-stop-page-breaking ()
8904   "Stop page breaking in the current article."
8905   (interactive)
8906   (gnus-summary-select-article)
8907   (gnus-eval-in-buffer-window gnus-article-buffer
8908     (widen)
8909     (when (gnus-visual-p 'page-marker)
8910       (let ((buffer-read-only nil))
8911         (gnus-remove-text-with-property 'gnus-prev)
8912         (gnus-remove-text-with-property 'gnus-next))
8913       (setq gnus-page-broken nil))))
8914
8915 (defun gnus-summary-move-article (&optional n to-newsgroup
8916                                             select-method action)
8917   "Move the current article to a different newsgroup.
8918 If N is a positive number, move the N next articles.
8919 If N is a negative number, move the N previous articles.
8920 If N is nil and any articles have been marked with the process mark,
8921 move those articles instead.
8922 If TO-NEWSGROUP is string, do not prompt for a newsgroup to move to.
8923 If SELECT-METHOD is non-nil, do not move to a specific newsgroup, but
8924 re-spool using this method.
8925
8926 When called interactively with TO-NEWSGROUP being nil, the value of
8927 the variable `gnus-move-split-methods' is used for finding a default
8928 for the target newsgroup.
8929
8930 For this function to work, both the current newsgroup and the
8931 newsgroup that you want to move to have to support the `request-move'
8932 and `request-accept' functions.
8933
8934 ACTION can be either `move' (the default), `crosspost' or `copy'."
8935   (interactive "P")
8936   (unless action
8937     (setq action 'move))
8938   ;; Check whether the source group supports the required functions.
8939   (cond ((and (eq action 'move)
8940               (not (gnus-check-backend-function
8941                     'request-move-article gnus-newsgroup-name)))
8942          (error "The current group does not support article moving"))
8943         ((and (eq action 'crosspost)
8944               (not (gnus-check-backend-function
8945                     'request-replace-article gnus-newsgroup-name)))
8946          (error "The current group does not support article editing")))
8947   (let ((articles (gnus-summary-work-articles n))
8948         (prefix (if (gnus-check-backend-function
8949                      'request-move-article gnus-newsgroup-name)
8950                     (gnus-group-real-prefix gnus-newsgroup-name)
8951                   ""))
8952         (names '((move "Move" "Moving")
8953                  (copy "Copy" "Copying")
8954                  (crosspost "Crosspost" "Crossposting")))
8955         (copy-buf (save-excursion
8956                     (nnheader-set-temp-buffer " *copy article*")))
8957         art-group to-method new-xref article to-groups)
8958     (unless (assq action names)
8959       (error "Unknown action %s" action))
8960     ;; Read the newsgroup name.
8961     (when (and (not to-newsgroup)
8962                (not select-method))
8963       (if (and gnus-move-split-methods
8964                (not
8965                 (and (memq gnus-current-article articles)
8966                      (gnus-buffer-live-p gnus-original-article-buffer))))
8967           ;; When `gnus-move-split-methods' is non-nil, we have to
8968           ;; select an article to give `gnus-read-move-group-name' an
8969           ;; opportunity to suggest an appropriate default.  However,
8970           ;; we needn't render or mark the article.
8971           (let ((gnus-display-mime-function nil)
8972                 (gnus-article-prepare-hook nil)
8973                 (gnus-mark-article-hook nil))
8974             (gnus-summary-select-article nil nil nil (car articles))))
8975       (setq to-newsgroup
8976             (gnus-read-move-group-name
8977              (cadr (assq action names))
8978              (symbol-value (intern (format "gnus-current-%s-group" action)))
8979              articles prefix))
8980       (set (intern (format "gnus-current-%s-group" action)) to-newsgroup))
8981     (setq to-method (or select-method
8982                         (gnus-server-to-method
8983                          (gnus-group-method to-newsgroup))))
8984     ;; Check the method we are to move this article to...
8985     (unless (gnus-check-backend-function
8986              'request-accept-article (car to-method))
8987       (error "%s does not support article copying" (car to-method)))
8988     (unless (gnus-check-server to-method)
8989       (error "Can't open server %s" (car to-method)))
8990     (gnus-message 6 "%s to %s: %s..."
8991                   (caddr (assq action names))
8992                   (or (car select-method) to-newsgroup) articles)
8993     (while articles
8994       (setq article (pop articles))
8995       (setq
8996        art-group
8997        (cond
8998         ;; Move the article.
8999         ((eq action 'move)
9000          ;; Remove this article from future suppression.
9001          (gnus-dup-unsuppress-article article)
9002          (gnus-request-move-article
9003           article                       ; Article to move
9004           gnus-newsgroup-name           ; From newsgroup
9005           (nth 1 (gnus-find-method-for-group
9006                   gnus-newsgroup-name)) ; Server
9007           (list 'gnus-request-accept-article
9008                 to-newsgroup (list 'quote select-method)
9009                 (not articles) t)       ; Accept form
9010           (not articles)))              ; Only save nov last time
9011         ;; Copy the article.
9012         ((eq action 'copy)
9013          (save-excursion
9014            (set-buffer copy-buf)
9015            (when (gnus-request-article-this-buffer article gnus-newsgroup-name)
9016              (gnus-request-accept-article
9017               to-newsgroup select-method (not articles) t))))
9018         ;; Crosspost the article.
9019         ((eq action 'crosspost)
9020          (let ((xref (message-tokenize-header
9021                       (mail-header-xref (gnus-summary-article-header article))
9022                       " ")))
9023            (setq new-xref (concat (gnus-group-real-name gnus-newsgroup-name)
9024                                   ":" (number-to-string article)))
9025            (unless xref
9026              (setq xref (list (system-name))))
9027            (setq new-xref
9028                  (concat
9029                   (mapconcat 'identity
9030                              (delete "Xref:" (delete new-xref xref))
9031                              " ")
9032                   " " new-xref))
9033            (save-excursion
9034              (set-buffer copy-buf)
9035              ;; First put the article in the destination group.
9036              (gnus-request-article-this-buffer article gnus-newsgroup-name)
9037              (when (consp (setq art-group
9038                                 (gnus-request-accept-article
9039                                  to-newsgroup select-method (not articles))))
9040                (setq new-xref (concat new-xref " " (car art-group)
9041                                       ":"
9042                                       (number-to-string (cdr art-group))))
9043                ;; Now we have the new Xrefs header, so we insert
9044                ;; it and replace the new article.
9045                (nnheader-replace-header "Xref" new-xref)
9046                (gnus-request-replace-article
9047                 (cdr art-group) to-newsgroup (current-buffer))
9048                art-group))))))
9049       (cond
9050        ((not art-group)
9051         (gnus-message 1 "Couldn't %s article %s: %s"
9052                       (cadr (assq action names)) article
9053                       (nnheader-get-report (car to-method))))
9054        ((eq art-group 'junk)
9055         (when (eq action 'move)
9056           (gnus-summary-mark-article article gnus-canceled-mark)
9057           (gnus-message 4 "Deleted article %s" article)
9058           ;; run the delete hook
9059           (run-hook-with-args 'gnus-summary-article-delete-hook
9060                               action
9061                               (gnus-data-header
9062                                (assoc article (gnus-data-list nil)))
9063                               gnus-newsgroup-name nil
9064                               select-method)))
9065        (t
9066         (let* ((pto-group (gnus-group-prefixed-name
9067                            (car art-group) to-method))
9068                (entry
9069                 (gnus-gethash pto-group gnus-newsrc-hashtb))
9070                (info (nth 2 entry))
9071                (to-group (gnus-info-group info))
9072                to-marks)
9073           ;; Update the group that has been moved to.
9074           (when (and info
9075                      (memq action '(move copy)))
9076             (unless (member to-group to-groups)
9077               (push to-group to-groups))
9078
9079             (unless (memq article gnus-newsgroup-unreads)
9080               (push 'read to-marks)
9081               (gnus-info-set-read
9082                info (gnus-add-to-range (gnus-info-read info)
9083                                        (list (cdr art-group)))))
9084
9085             ;; See whether the article is to be put in the cache.
9086             (let ((marks (if (gnus-group-auto-expirable-p to-group)
9087                              gnus-article-mark-lists
9088                            (delete '(expirable . expire)
9089                                    (copy-sequence gnus-article-mark-lists))))
9090                   (to-article (cdr art-group)))
9091
9092               ;; Enter the article into the cache in the new group,
9093               ;; if that is required.
9094               (when gnus-use-cache
9095                 (gnus-cache-possibly-enter-article
9096                  to-group to-article
9097                  (memq article gnus-newsgroup-marked)
9098                  (memq article gnus-newsgroup-dormant)
9099                  (memq article gnus-newsgroup-unreads)))
9100
9101               (when gnus-preserve-marks
9102                 ;; Copy any marks over to the new group.
9103                 (when (and (equal to-group gnus-newsgroup-name)
9104                            (not (memq article gnus-newsgroup-unreads)))
9105                   ;; Mark this article as read in this group.
9106                   (push (cons to-article gnus-read-mark) gnus-newsgroup-reads)
9107                   (setcdr (gnus-active to-group) to-article)
9108                   (setcdr gnus-newsgroup-active to-article))
9109
9110                 (while marks
9111                   (when (eq (gnus-article-mark-to-type (cdar marks)) 'list)
9112                     (when (memq article (symbol-value
9113                                          (intern (format "gnus-newsgroup-%s"
9114                                                          (caar marks)))))
9115                       (push (cdar marks) to-marks)
9116                       ;; If the other group is the same as this group,
9117                       ;; then we have to add the mark to the list.
9118                       (when (equal to-group gnus-newsgroup-name)
9119                         (set (intern (format "gnus-newsgroup-%s" (caar marks)))
9120                              (cons to-article
9121                                    (symbol-value
9122                                     (intern (format "gnus-newsgroup-%s"
9123                                                     (caar marks)))))))
9124                       ;; Copy the marks to other group.
9125                       (gnus-add-marked-articles
9126                        to-group (cdar marks) (list to-article) info)))
9127                   (setq marks (cdr marks)))
9128
9129                 (gnus-request-set-mark
9130                  to-group (list (list (list to-article) 'add to-marks))))
9131
9132               (gnus-dribble-enter
9133                (concat "(gnus-group-set-info '"
9134                        (gnus-prin1-to-string (gnus-get-info to-group))
9135                        ")"))))
9136
9137           ;; Update the Xref header in this article to point to
9138           ;; the new crossposted article we have just created.
9139           (when (eq action 'crosspost)
9140             (save-excursion
9141               (set-buffer copy-buf)
9142               (gnus-request-article-this-buffer article gnus-newsgroup-name)
9143               (nnheader-replace-header "Xref" new-xref)
9144               (gnus-request-replace-article
9145                article gnus-newsgroup-name (current-buffer))))
9146
9147           ;; run the move/copy/crosspost/respool hook
9148           (run-hook-with-args 'gnus-summary-article-move-hook
9149                               action
9150                               (gnus-data-header
9151                                (assoc article (gnus-data-list nil)))
9152                               gnus-newsgroup-name
9153                               to-newsgroup
9154                               select-method))
9155
9156         ;;;!!!Why is this necessary?
9157         (set-buffer gnus-summary-buffer)
9158
9159         (gnus-summary-goto-subject article)
9160         (when (eq action 'move)
9161           (gnus-summary-mark-article article gnus-canceled-mark))))
9162       (gnus-summary-remove-process-mark article))
9163     ;; Re-activate all groups that have been moved to.
9164     (save-excursion
9165       (set-buffer gnus-group-buffer)
9166       (let ((gnus-group-marked to-groups))
9167         (gnus-group-get-new-news-this-group nil t)))
9168
9169     (gnus-kill-buffer copy-buf)
9170     (gnus-summary-position-point)
9171     (gnus-set-mode-line 'summary)))
9172
9173 (defun gnus-summary-copy-article (&optional n to-newsgroup select-method)
9174   "Copy the current article to some other group.
9175 If TO-NEWSGROUP is string, do not prompt for a newsgroup to copy to.
9176 When called interactively, if TO-NEWSGROUP is nil, use the value of
9177 the variable `gnus-move-split-methods' for finding a default target
9178 newsgroup.
9179 If SELECT-METHOD is non-nil, do not move to a specific newsgroup, but
9180 re-spool using this method."
9181   (interactive "P")
9182   (gnus-summary-move-article n to-newsgroup select-method 'copy))
9183
9184 (defun gnus-summary-crosspost-article (&optional n)
9185   "Crosspost the current article to some other group."
9186   (interactive "P")
9187   (gnus-summary-move-article n nil nil 'crosspost))
9188
9189 (defcustom gnus-summary-respool-default-method nil
9190   "Default method type for respooling an article.
9191 If nil, use to the current newsgroup method."
9192   :type 'symbol
9193   :group 'gnus-summary-mail)
9194
9195 (defcustom gnus-summary-display-while-building nil
9196   "If non-nil, show and update the summary buffer as it's being built.
9197 If the value is t, update the buffer after every line is inserted.  If
9198 the value is an integer (N), update the display every N lines."
9199   :version "22.1"
9200   :group 'gnus-thread
9201   :type '(choice (const :tag "off" nil)
9202                  number
9203                  (const :tag "frequently" t)))
9204
9205 (defun gnus-summary-respool-article (&optional n method)
9206   "Respool the current article.
9207 The article will be squeezed through the mail spooling process again,
9208 which means that it will be put in some mail newsgroup or other
9209 depending on `nnmail-split-methods'.
9210 If N is a positive number, respool the N next articles.
9211 If N is a negative number, respool the N previous articles.
9212 If N is nil and any articles have been marked with the process mark,
9213 respool those articles instead.
9214
9215 Respooling can be done both from mail groups and \"real\" newsgroups.
9216 In the former case, the articles in question will be moved from the
9217 current group into whatever groups they are destined to.  In the
9218 latter case, they will be copied into the relevant groups."
9219   (interactive
9220    (list current-prefix-arg
9221          (let* ((methods (gnus-methods-using 'respool))
9222                 (methname
9223                  (symbol-name (or gnus-summary-respool-default-method
9224                                   (car (gnus-find-method-for-group
9225                                         gnus-newsgroup-name)))))
9226                 (method
9227                  (gnus-completing-read-with-default
9228                   methname "Backend to use when respooling"
9229                   methods nil t nil 'gnus-mail-method-history))
9230                 ms)
9231            (cond
9232             ((zerop (length (setq ms (gnus-servers-using-backend
9233                                       (intern method)))))
9234              (list (intern method) ""))
9235             ((= 1 (length ms))
9236              (car ms))
9237             (t
9238              (let ((ms-alist (mapcar (lambda (m) (cons (cadr m) m)) ms)))
9239                (cdr (assoc (completing-read "Server name: " ms-alist nil t)
9240                            ms-alist))))))))
9241   (unless method
9242     (error "No method given for respooling"))
9243   (if (assoc (symbol-name
9244               (car (gnus-find-method-for-group gnus-newsgroup-name)))
9245              (gnus-methods-using 'respool))
9246       (gnus-summary-move-article n nil method)
9247     (gnus-summary-copy-article n nil method)))
9248
9249 (defun gnus-summary-import-article (file &optional edit)
9250   "Import an arbitrary file into a mail newsgroup."
9251   (interactive "fImport file: \nP")
9252   (let ((group gnus-newsgroup-name)
9253         (now (current-time))
9254         atts lines group-art)
9255     (unless (gnus-check-backend-function 'request-accept-article group)
9256       (error "%s does not support article importing" group))
9257     (or (file-readable-p file)
9258         (not (file-regular-p file))
9259         (error "Can't read %s" file))
9260     (save-excursion
9261       (set-buffer (gnus-get-buffer-create " *import file*"))
9262       (erase-buffer)
9263       (nnheader-insert-file-contents file)
9264       (goto-char (point-min))
9265       (if (nnheader-article-p)
9266           (save-restriction
9267             (goto-char (point-min))
9268             (search-forward "\n\n" nil t)
9269             (narrow-to-region (point-min) (1- (point)))
9270             (goto-char (point-min))
9271             (unless (re-search-forward "^date:" nil t)
9272               (goto-char (point-max))
9273               (insert "Date: " (message-make-date (nth 5 atts)) "\n")))
9274        ;; This doesn't look like an article, so we fudge some headers.
9275         (setq atts (file-attributes file)
9276               lines (count-lines (point-min) (point-max)))
9277         (insert "From: " (read-string "From: ") "\n"
9278                 "Subject: " (read-string "Subject: ") "\n"
9279                 "Date: " (message-make-date (nth 5 atts)) "\n"
9280                 "Message-ID: " (message-make-message-id) "\n"
9281                 "Lines: " (int-to-string lines) "\n"
9282                 "Chars: " (int-to-string (nth 7 atts)) "\n\n"))
9283       (setq group-art (gnus-request-accept-article group nil t))
9284       (kill-buffer (current-buffer)))
9285     (setq gnus-newsgroup-active (gnus-activate-group group))
9286     (forward-line 1)
9287     (gnus-summary-goto-article (cdr group-art) nil t)
9288     (when edit
9289       (gnus-summary-edit-article))))
9290
9291 (defun gnus-summary-create-article ()
9292   "Create an article in a mail newsgroup."
9293   (interactive)
9294   (let ((group gnus-newsgroup-name)
9295         (now (current-time))
9296         group-art)
9297     (unless (gnus-check-backend-function 'request-accept-article group)
9298       (error "%s does not support article importing" group))
9299     (save-excursion
9300       (set-buffer (gnus-get-buffer-create " *import file*"))
9301       (erase-buffer)
9302       (goto-char (point-min))
9303       ;; This doesn't look like an article, so we fudge some headers.
9304       (insert "From: " (read-string "From: ") "\n"
9305               "Subject: " (read-string "Subject: ") "\n"
9306               "Date: " (message-make-date now) "\n"
9307               "Message-ID: " (message-make-message-id) "\n")
9308       (setq group-art (gnus-request-accept-article group nil t))
9309       (kill-buffer (current-buffer)))
9310     (setq gnus-newsgroup-active (gnus-activate-group group))
9311     (forward-line 1)
9312     (gnus-summary-goto-article (cdr group-art) nil t)
9313     (gnus-summary-edit-article)))
9314
9315 (defun gnus-summary-article-posted-p ()
9316   "Say whether the current (mail) article is available from news as well.
9317 This will be the case if the article has both been mailed and posted."
9318   (interactive)
9319   (let ((id (mail-header-references (gnus-summary-article-header)))
9320         (gnus-override-method (car (gnus-refer-article-methods))))
9321     (if (gnus-request-head id "")
9322         (gnus-message 2 "The current message was found on %s"
9323                       gnus-override-method)
9324       (gnus-message 2 "The current message couldn't be found on %s"
9325                     gnus-override-method)
9326       nil)))
9327
9328 (defun gnus-summary-expire-articles (&optional now)
9329   "Expire all articles that are marked as expirable in the current group."
9330   (interactive)
9331   (when (and (not gnus-group-is-exiting-without-update-p)
9332              (gnus-check-backend-function
9333               'request-expire-articles gnus-newsgroup-name))
9334     ;; This backend supports expiry.
9335     (let* ((total (gnus-group-total-expirable-p gnus-newsgroup-name))
9336            (expirable (if total
9337                           (progn
9338                             ;; We need to update the info for
9339                             ;; this group for `gnus-list-of-read-articles'
9340                             ;; to give us the right answer.
9341                             (gnus-run-hooks 'gnus-exit-group-hook)
9342                             (gnus-summary-update-info)
9343                             (gnus-list-of-read-articles gnus-newsgroup-name))
9344                         (setq gnus-newsgroup-expirable
9345                               (sort gnus-newsgroup-expirable '<))))
9346            (expiry-wait (if now 'immediate
9347                           (gnus-group-find-parameter
9348                            gnus-newsgroup-name 'expiry-wait)))
9349            (nnmail-expiry-target
9350             (or (gnus-group-find-parameter gnus-newsgroup-name 'expiry-target)
9351                 nnmail-expiry-target))
9352            es)
9353       (when expirable
9354         ;; There are expirable articles in this group, so we run them
9355         ;; through the expiry process.
9356         (gnus-message 6 "Expiring articles...")
9357         (unless (gnus-check-group gnus-newsgroup-name)
9358           (error "Can't open server for %s" gnus-newsgroup-name))
9359         ;; The list of articles that weren't expired is returned.
9360         (save-excursion
9361           (if expiry-wait
9362               (let ((nnmail-expiry-wait-function nil)
9363                     (nnmail-expiry-wait expiry-wait))
9364                 (setq es (gnus-request-expire-articles
9365                           expirable gnus-newsgroup-name)))
9366             (setq es (gnus-request-expire-articles
9367                       expirable gnus-newsgroup-name)))
9368           (unless total
9369             (setq gnus-newsgroup-expirable es))
9370           ;; We go through the old list of expirable, and mark all
9371           ;; really expired articles as nonexistent.
9372           (unless (eq es expirable) ;If nothing was expired, we don't mark.
9373             (let ((gnus-use-cache nil))
9374               (dolist (article expirable)
9375                 (when (and (not (memq article es))
9376                            (gnus-data-find article))
9377                   (gnus-summary-mark-article article gnus-canceled-mark)
9378                   (run-hook-with-args 'gnus-summary-article-expire-hook
9379                                       'delete
9380                                       (gnus-data-header
9381                                        (assoc article (gnus-data-list nil)))
9382                                       gnus-newsgroup-name
9383                                       nil
9384                                       nil))))))
9385         (gnus-message 6 "Expiring articles...done")))))
9386
9387 (defun gnus-summary-expire-articles-now ()
9388   "Expunge all expirable articles in the current group.
9389 This means that *all* articles that are marked as expirable will be
9390 deleted forever, right now."
9391   (interactive)
9392   (or gnus-expert-user
9393       (gnus-yes-or-no-p
9394        "Are you really, really, really sure you want to delete all these messages? ")
9395       (error "Phew!"))
9396   (gnus-summary-expire-articles t))
9397
9398 ;; Suggested by Jack Vinson <vinson@unagi.cis.upenn.edu>.
9399 (defun gnus-summary-delete-article (&optional n)
9400   "Delete the N next (mail) articles.
9401 This command actually deletes articles.  This is not a marking
9402 command.  The article will disappear forever from your life, never to
9403 return.
9404
9405 If N is negative, delete backwards.
9406 If N is nil and articles have been marked with the process mark,
9407 delete these instead.
9408
9409 If `gnus-novice-user' is non-nil you will be asked for
9410 confirmation before the articles are deleted."
9411   (interactive "P")
9412   (unless (gnus-check-backend-function 'request-expire-articles
9413                                        gnus-newsgroup-name)
9414     (error "The current newsgroup does not support article deletion"))
9415   (unless (gnus-check-server (gnus-find-method-for-group gnus-newsgroup-name))
9416     (error "Couldn't open server"))
9417   ;; Compute the list of articles to delete.
9418   (let ((articles (sort (copy-sequence (gnus-summary-work-articles n)) '<))
9419         (nnmail-expiry-target 'delete)
9420         not-deleted)
9421     (if (and gnus-novice-user
9422              (not (gnus-yes-or-no-p
9423                    (format "Do you really want to delete %s forever? "
9424                            (if (> (length articles) 1)
9425                                (format "these %s articles" (length articles))
9426                              "this article")))))
9427         ()
9428       ;; Delete the articles.
9429       (setq not-deleted (gnus-request-expire-articles
9430                          articles gnus-newsgroup-name 'force))
9431       (while articles
9432         (gnus-summary-remove-process-mark (car articles))
9433         ;; The backend might not have been able to delete the article
9434         ;; after all.
9435         (unless (memq (car articles) not-deleted)
9436           (gnus-summary-mark-article (car articles) gnus-canceled-mark))
9437         (let* ((article (car articles))
9438                (id (mail-header-id (gnus-data-header
9439                                     (assoc article (gnus-data-list nil))))))
9440           (run-hook-with-args 'gnus-summary-article-delete-hook
9441                               'delete id gnus-newsgroup-name nil
9442                               nil))
9443         (setq articles (cdr articles)))
9444       (when not-deleted
9445         (gnus-message 4 "Couldn't delete articles %s" not-deleted)))
9446     (gnus-summary-position-point)
9447     (gnus-set-mode-line 'summary)
9448     not-deleted))
9449
9450 (defun gnus-summary-edit-article (&optional arg)
9451   "Edit the current article.
9452 This will have permanent effect only in mail groups.
9453 If ARG is nil, edit the decoded articles.
9454 If ARG is 1, edit the raw articles.
9455 If ARG is 2, edit the raw articles even in read-only groups.
9456 If ARG is 3, edit the articles with the current handles.
9457 Otherwise, allow editing of articles even in read-only
9458 groups."
9459   (interactive "P")
9460   (let (force raw current-handles)
9461     (cond
9462      ((null arg))
9463      ((eq arg 1)
9464       (setq raw t))
9465      ((eq arg 2)
9466       (setq raw t
9467             force t))
9468      ((eq arg 3)
9469       (setq current-handles
9470             (and (gnus-buffer-live-p gnus-article-buffer)
9471                  (with-current-buffer gnus-article-buffer
9472                    (prog1
9473                        gnus-article-mime-handles
9474                      (setq gnus-article-mime-handles nil))))))
9475      (t
9476       (setq force t)))
9477     (when (and raw (not force)
9478                (member gnus-newsgroup-name '("nndraft:delayed"
9479                                              "nndraft:drafts"
9480                                              "nndraft:queue")))
9481       (error "Can't edit the raw article in group %s"
9482              gnus-newsgroup-name))
9483     (save-excursion
9484       (set-buffer gnus-summary-buffer)
9485       (let ((mail-parse-charset gnus-newsgroup-charset)
9486             (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets))
9487         (gnus-set-global-variables)
9488         (when (and (not force)
9489                    (gnus-group-read-only-p))
9490           (error "The current newsgroup does not support article editing"))
9491         (gnus-summary-show-article t)
9492         (when (and (not raw) (gnus-buffer-live-p gnus-article-buffer))
9493           (with-current-buffer gnus-article-buffer
9494             (mm-enable-multibyte)))
9495         (if (member gnus-newsgroup-name '("nndraft:delayed" "nndraft:drafts"))
9496             (setq raw t))
9497         (gnus-article-edit-article
9498          (if raw 'ignore
9499            `(lambda ()
9500               (let ((mbl mml-buffer-list))
9501                 (setq mml-buffer-list nil)
9502                 (let ((rfc2047-quote-decoded-words-containing-tspecials t))
9503                   (mime-to-mml ,'current-handles))
9504                 (let ((mbl1 mml-buffer-list))
9505                   (setq mml-buffer-list mbl)
9506                   (set (make-local-variable 'mml-buffer-list) mbl1))
9507                 (gnus-make-local-hook 'kill-buffer-hook)
9508                 (add-hook 'kill-buffer-hook 'mml-destroy-buffers t t))))
9509          `(lambda (no-highlight)
9510             (let ((mail-parse-charset ',gnus-newsgroup-charset)
9511                   (message-options message-options)
9512                   (message-options-set-recipient)
9513                   (mail-parse-ignored-charsets
9514                    ',gnus-newsgroup-ignored-charsets))
9515               ,(if (not raw) '(progn
9516                                 (mml-to-mime)
9517                                 (mml-destroy-buffers)
9518                                 (remove-hook 'kill-buffer-hook
9519                                              'mml-destroy-buffers t)
9520                                 (kill-local-variable 'mml-buffer-list)))
9521               (gnus-summary-edit-article-done
9522                ,(or (mail-header-references gnus-current-headers) "")
9523                ,(gnus-group-read-only-p)
9524                ,gnus-summary-buffer no-highlight))))))))
9525
9526 (defalias 'gnus-summary-edit-article-postpone 'gnus-article-edit-exit)
9527
9528 (defun gnus-summary-edit-article-done (&optional references read-only buffer
9529                                                  no-highlight)
9530   "Make edits to the current article permanent."
9531   (interactive)
9532   (save-excursion
9533    ;; The buffer restriction contains the entire article if it exists.
9534     (when (article-goto-body)
9535       (let ((lines (count-lines (point) (point-max)))
9536             (length (- (point-max) (point)))
9537             (case-fold-search t)
9538             (body (copy-marker (point))))
9539         (goto-char (point-min))
9540         (when (re-search-forward "^content-length:[ \t]\\([0-9]+\\)" body t)
9541           (delete-region (match-beginning 1) (match-end 1))
9542           (insert (number-to-string length)))
9543         (goto-char (point-min))
9544         (when (re-search-forward
9545                "^x-content-length:[ \t]\\([0-9]+\\)" body t)
9546           (delete-region (match-beginning 1) (match-end 1))
9547           (insert (number-to-string length)))
9548         (goto-char (point-min))
9549         (when (re-search-forward "^lines:[ \t]\\([0-9]+\\)" body t)
9550           (delete-region (match-beginning 1) (match-end 1))
9551           (insert (number-to-string lines))))))
9552   ;; Replace the article.
9553   (let ((buf (current-buffer)))
9554     (with-temp-buffer
9555       (insert-buffer-substring buf)
9556
9557       (if (and (not read-only)
9558                (not (gnus-request-replace-article
9559                      (cdr gnus-article-current) (car gnus-article-current)
9560                      (current-buffer) t)))
9561           (error "Couldn't replace article")
9562         ;; Update the summary buffer.
9563         (if (and references
9564                  (equal (message-tokenize-header references " ")
9565                         (message-tokenize-header
9566                          (or (message-fetch-field "references") "") " ")))
9567             ;; We only have to update this line.
9568             (save-excursion
9569               (save-restriction
9570                 (message-narrow-to-head)
9571                 (let ((head (buffer-substring-no-properties
9572                              (point-min) (point-max)))
9573                       header)
9574                   (with-temp-buffer
9575                     (insert (format "211 %d Article retrieved.\n"
9576                                     (cdr gnus-article-current)))
9577                     (insert head)
9578                     (insert ".\n")
9579                     (let ((nntp-server-buffer (current-buffer)))
9580                       (setq header (car (gnus-get-newsgroup-headers
9581                                          nil t))))
9582                     (save-excursion
9583                       (set-buffer gnus-summary-buffer)
9584                       (gnus-data-set-header
9585                        (gnus-data-find (cdr gnus-article-current))
9586                        header)
9587                       (gnus-summary-update-article-line
9588                        (cdr gnus-article-current) header)
9589                       (if (gnus-summary-goto-subject
9590                            (cdr gnus-article-current) nil t)
9591                           (gnus-summary-update-secondary-mark
9592                            (cdr gnus-article-current))))))))
9593           ;; Update threads.
9594           (set-buffer (or buffer gnus-summary-buffer))
9595           (gnus-summary-update-article (cdr gnus-article-current))
9596           (if (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
9597               (gnus-summary-update-secondary-mark
9598                (cdr gnus-article-current))))
9599         ;; Prettify the article buffer again.
9600         (unless no-highlight
9601           (save-excursion
9602             (set-buffer gnus-article-buffer)
9603             ;;;!!! Fix this -- article should be rehighlighted.
9604             ;;;(gnus-run-hooks 'gnus-article-display-hook)
9605             (set-buffer gnus-original-article-buffer)
9606             (gnus-request-article
9607              (cdr gnus-article-current)
9608              (car gnus-article-current) (current-buffer))))
9609         ;; Prettify the summary buffer line.
9610         (when (gnus-visual-p 'summary-highlight 'highlight)
9611           (gnus-run-hooks 'gnus-visual-mark-article-hook))))))
9612
9613 (defun gnus-summary-edit-wash (key)
9614   "Perform editing command KEY in the article buffer."
9615   (interactive
9616    (list
9617     (progn
9618       (message "%s" (concat (this-command-keys) "- "))
9619       (read-char))))
9620   (message "")
9621   (gnus-summary-edit-article)
9622   (execute-kbd-macro (concat (this-command-keys) key))
9623   (gnus-article-edit-done))
9624
9625 ;;; Respooling
9626
9627 (defun gnus-summary-respool-query (&optional silent trace)
9628   "Query where the respool algorithm would put this article."
9629   (interactive)
9630   (let (gnus-mark-article-hook)
9631     (gnus-summary-select-article)
9632     (save-excursion
9633       (set-buffer gnus-original-article-buffer)
9634       (let ((groups (nnmail-article-group 'identity trace)))
9635         (unless silent
9636           (if groups
9637               (message "This message would go to %s"
9638                        (mapconcat 'car groups ", "))
9639             (message "This message would go to no groups"))
9640           groups)))))
9641
9642 (defun gnus-summary-respool-trace ()
9643   "Trace where the respool algorithm would put this article.
9644 Display a buffer showing all fancy splitting patterns which matched."
9645   (interactive)
9646   (gnus-summary-respool-query nil t))
9647
9648 ;; Summary marking commands.
9649
9650 (defun gnus-summary-kill-same-subject-and-select (&optional unmark)
9651   "Mark articles which has the same subject as read, and then select the next.
9652 If UNMARK is positive, remove any kind of mark.
9653 If UNMARK is negative, tick articles."
9654   (interactive "P")
9655   (when unmark
9656     (setq unmark (prefix-numeric-value unmark)))
9657   (let ((count
9658          (gnus-summary-mark-same-subject
9659           (gnus-summary-article-subject) unmark)))
9660     ;; Select next unread article.  If auto-select-same mode, should
9661     ;; select the first unread article.
9662     (gnus-summary-next-article t (and gnus-auto-select-same
9663                                       (gnus-summary-article-subject)))
9664     (gnus-message 7 "%d article%s marked as %s"
9665                   count (if (= count 1) " is" "s are")
9666                   (if unmark "unread" "read"))))
9667
9668 (defun gnus-summary-kill-same-subject (&optional unmark)
9669   "Mark articles which has the same subject as read.
9670 If UNMARK is positive, remove any kind of mark.
9671 If UNMARK is negative, tick articles."
9672   (interactive "P")
9673   (when unmark
9674     (setq unmark (prefix-numeric-value unmark)))
9675   (let ((count
9676          (gnus-summary-mark-same-subject
9677           (gnus-summary-article-subject) unmark)))
9678     ;; If marked as read, go to next unread subject.
9679     (when (null unmark)
9680       ;; Go to next unread subject.
9681       (gnus-summary-next-subject 1 t))
9682     (gnus-message 7 "%d articles are marked as %s"
9683                   count (if unmark "unread" "read"))))
9684
9685 (defun gnus-summary-mark-same-subject (subject &optional unmark)
9686   "Mark articles with same SUBJECT as read, and return marked number.
9687 If optional argument UNMARK is positive, remove any kinds of marks.
9688 If optional argument UNMARK is negative, mark articles as unread instead."
9689   (let ((count 1))
9690     (save-excursion
9691       (cond
9692        ((null unmark)                   ; Mark as read.
9693         (while (and
9694                 (progn
9695                   (gnus-summary-mark-article-as-read gnus-killed-mark)
9696                   (gnus-summary-show-thread) t)
9697                 (gnus-summary-find-subject subject))
9698           (setq count (1+ count))))
9699        ((> unmark 0)                    ; Tick.
9700         (while (and
9701                 (progn
9702                   (gnus-summary-mark-article-as-unread gnus-ticked-mark)
9703                   (gnus-summary-show-thread) t)
9704                 (gnus-summary-find-subject subject))
9705           (setq count (1+ count))))
9706        (t                               ; Mark as unread.
9707         (while (and
9708                 (progn
9709                   (gnus-summary-mark-article-as-unread gnus-unread-mark)
9710                   (gnus-summary-show-thread) t)
9711                 (gnus-summary-find-subject subject))
9712           (setq count (1+ count)))))
9713       (gnus-set-mode-line 'summary)
9714       ;; Return the number of marked articles.
9715       count)))
9716
9717 (defun gnus-summary-mark-as-processable (n &optional unmark)
9718   "Set the process mark on the next N articles.
9719 If N is negative, mark backward instead.  If UNMARK is non-nil, remove
9720 the process mark instead.  The difference between N and the actual
9721 number of articles marked is returned."
9722   (interactive "P")
9723   (if (and (null n) (gnus-region-active-p))
9724       (gnus-uu-mark-region (region-beginning) (region-end) unmark)
9725     (setq n (prefix-numeric-value n))
9726     (let ((backward (< n 0))
9727           (n (abs n)))
9728       (while (and
9729               (> n 0)
9730               (if unmark
9731                   (gnus-summary-remove-process-mark
9732                    (gnus-summary-article-number))
9733                 (gnus-summary-set-process-mark (gnus-summary-article-number)))
9734               (zerop (gnus-summary-next-subject (if backward -1 1) nil t)))
9735         (setq n (1- n)))
9736       (when (/= 0 n)
9737         (gnus-message 7 "No more articles"))
9738       (gnus-summary-recenter)
9739       (gnus-summary-position-point)
9740       n)))
9741
9742 (defun gnus-summary-unmark-as-processable (n)
9743   "Remove the process mark from the next N articles.
9744 If N is negative, unmark backward instead.  The difference between N and
9745 the actual number of articles unmarked is returned."
9746   (interactive "P")
9747   (gnus-summary-mark-as-processable n t))
9748
9749 (defun gnus-summary-unmark-all-processable ()
9750   "Remove the process mark from all articles."
9751   (interactive)
9752   (save-excursion
9753     (while gnus-newsgroup-processable
9754       (gnus-summary-remove-process-mark (car gnus-newsgroup-processable))))
9755   (gnus-summary-position-point))
9756
9757 (defun gnus-summary-add-mark (article type)
9758   "Mark ARTICLE with a mark of TYPE."
9759   (let ((vtype (car (assq type gnus-article-mark-lists)))
9760         var)
9761     (if (not vtype)
9762         (error "No such mark type: %s" type)
9763       (setq var (intern (format "gnus-newsgroup-%s" type)))
9764       (set var (cons article (symbol-value var)))
9765       (if (memq type '(processable cached replied forwarded recent saved))
9766           (gnus-summary-update-secondary-mark article)
9767         ;;; !!! This is bogus.  We should find out what primary
9768         ;;; !!! mark we want to set.
9769         (gnus-summary-update-mark gnus-del-mark 'unread)))))
9770
9771 (defun gnus-summary-mark-as-expirable (n)
9772   "Mark N articles forward as expirable.
9773 If N is negative, mark backward instead.  The difference between N and
9774 the actual number of articles marked is returned."
9775   (interactive "p")
9776   (gnus-summary-mark-forward n gnus-expirable-mark))
9777
9778 (defun gnus-summary-mark-as-spam (n)
9779   "Mark N articles forward as spam.
9780 If N is negative, mark backward instead.  The difference between N and
9781 the actual number of articles marked is returned."
9782   (interactive "p")
9783   (gnus-summary-mark-forward n gnus-spam-mark))
9784
9785 (defun gnus-summary-mark-article-as-replied (article)
9786   "Mark ARTICLE as replied to and update the summary line.
9787 ARTICLE can also be a list of articles."
9788   (interactive (list (gnus-summary-article-number)))
9789   (let ((articles (if (listp article) article (list article))))
9790     (dolist (article articles)
9791       (unless (numberp article)
9792         (error "%s is not a number" article))
9793       (push article gnus-newsgroup-replied)
9794       (let ((buffer-read-only nil))
9795         (when (gnus-summary-goto-subject article nil t)
9796           (gnus-summary-update-secondary-mark article))))))
9797
9798 (defun gnus-summary-mark-article-as-forwarded (article)
9799   "Mark ARTICLE as forwarded and update the summary line.
9800 ARTICLE can also be a list of articles."
9801   (let ((articles (if (listp article) article (list article))))
9802     (dolist (article articles)
9803       (push article gnus-newsgroup-forwarded)
9804       (let ((buffer-read-only nil))
9805         (when (gnus-summary-goto-subject article nil t)
9806           (gnus-summary-update-secondary-mark article))))))
9807
9808 (defun gnus-summary-set-bookmark (article)
9809   "Set a bookmark in current article."
9810   (interactive (list (gnus-summary-article-number)))
9811   (when (or (not (get-buffer gnus-article-buffer))
9812             (not gnus-current-article)
9813             (not gnus-article-current)
9814             (not (equal gnus-newsgroup-name (car gnus-article-current))))
9815     (error "No current article selected"))
9816   ;; Remove old bookmark, if one exists.
9817   (gnus-pull article gnus-newsgroup-bookmarks)
9818   ;; Set the new bookmark, which is on the form
9819   ;; (article-number . line-number-in-body).
9820   (push
9821    (cons article
9822          (save-excursion
9823            (set-buffer gnus-article-buffer)
9824            (count-lines
9825             (min (point)
9826                  (save-excursion
9827                    (article-goto-body)
9828                    (point)))
9829             (point))))
9830    gnus-newsgroup-bookmarks)
9831   (gnus-message 6 "A bookmark has been added to the current article."))
9832
9833 (defun gnus-summary-remove-bookmark (article)
9834   "Remove the bookmark from the current article."
9835   (interactive (list (gnus-summary-article-number)))
9836   ;; Remove old bookmark, if one exists.
9837   (if (not (assq article gnus-newsgroup-bookmarks))
9838       (gnus-message 6 "No bookmark in current article.")
9839     (gnus-pull article gnus-newsgroup-bookmarks)
9840     (gnus-message 6 "Removed bookmark.")))
9841
9842 ;; Suggested by Daniel Quinlan <quinlan@best.com>.
9843 (defun gnus-summary-mark-as-dormant (n)
9844   "Mark N articles forward as dormant.
9845 If N is negative, mark backward instead.  The difference between N and
9846 the actual number of articles marked is returned."
9847   (interactive "p")
9848   (gnus-summary-mark-forward n gnus-dormant-mark))
9849
9850 (defun gnus-summary-set-process-mark (article)
9851   "Set the process mark on ARTICLE and update the summary line."
9852   (setq gnus-newsgroup-processable
9853         (cons article
9854               (delq article gnus-newsgroup-processable)))
9855   (when (gnus-summary-goto-subject article)
9856     (gnus-summary-show-thread)
9857     (gnus-summary-goto-subject article)
9858     (gnus-summary-update-secondary-mark article)))
9859
9860 (defun gnus-summary-remove-process-mark (article)
9861   "Remove the process mark from ARTICLE and update the summary line."
9862   (setq gnus-newsgroup-processable (delq article gnus-newsgroup-processable))
9863   (when (gnus-summary-goto-subject article)
9864     (gnus-summary-show-thread)
9865     (gnus-summary-goto-subject article)
9866     (gnus-summary-update-secondary-mark article)))
9867
9868 (defun gnus-summary-set-saved-mark (article)
9869   "Set the process mark on ARTICLE and update the summary line."
9870   (push article gnus-newsgroup-saved)
9871   (when (gnus-summary-goto-subject article)
9872     (gnus-summary-update-secondary-mark article)))
9873
9874 (defun gnus-summary-mark-forward (n &optional mark no-expire)
9875   "Mark N articles as read forwards.
9876 If N is negative, mark backwards instead.  Mark with MARK, ?r by default.
9877 The difference between N and the actual number of articles marked is
9878 returned.
9879 If NO-EXPIRE, auto-expiry will be inhibited."
9880   (interactive "p")
9881   (gnus-summary-show-thread)
9882   (let ((backward (< n 0))
9883         (gnus-summary-goto-unread
9884          (and gnus-summary-goto-unread
9885               (not (eq gnus-summary-goto-unread 'never))
9886               (not (memq mark (list gnus-unread-mark gnus-spam-mark
9887                                     gnus-ticked-mark gnus-dormant-mark)))))
9888         (n (abs n))
9889         (mark (or mark gnus-del-mark)))
9890     (while (and (> n 0)
9891                 (gnus-summary-mark-article nil mark no-expire)
9892                 (zerop (gnus-summary-next-subject
9893                         (if backward -1 1)
9894                         (and gnus-summary-goto-unread
9895                              (not (eq gnus-summary-goto-unread 'never)))
9896                         t)))
9897       (setq n (1- n)))
9898     (when (/= 0 n)
9899       (gnus-message 7 "No more %sarticles" (if mark "" "unread ")))
9900     (gnus-summary-recenter)
9901     (gnus-summary-position-point)
9902     (gnus-set-mode-line 'summary)
9903     n))
9904
9905 (defun gnus-summary-mark-article-as-read (mark)
9906   "Mark the current article quickly as read with MARK."
9907   (let ((article (gnus-summary-article-number)))
9908     (setq gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
9909     (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
9910     (setq gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked))
9911     (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
9912     (push (cons article mark) gnus-newsgroup-reads)
9913     ;; Possibly remove from cache, if that is used.
9914     (when gnus-use-cache
9915       (gnus-cache-enter-remove-article article))
9916     ;; Allow the backend to change the mark.
9917     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
9918     ;; Check for auto-expiry.
9919     (when (and gnus-newsgroup-auto-expire
9920                (memq mark gnus-auto-expirable-marks))
9921       (setq mark gnus-expirable-mark)
9922       ;; Let the backend know about the mark change.
9923       (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
9924       (push article gnus-newsgroup-expirable))
9925     ;; Set the mark in the buffer.
9926     (gnus-summary-update-mark mark 'unread)
9927     t))
9928
9929 (defun gnus-summary-mark-article-as-unread (mark)
9930   "Mark the current article quickly as unread with MARK."
9931   (let* ((article (gnus-summary-article-number))
9932          (old-mark (gnus-summary-article-mark article)))
9933     ;; Allow the backend to change the mark.
9934     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
9935     (if (eq mark old-mark)
9936         t
9937       (if (<= article 0)
9938           (progn
9939             (gnus-error 1 "Can't mark negative article numbers")
9940             nil)
9941         (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
9942         (setq gnus-newsgroup-spam-marked
9943               (delq article gnus-newsgroup-spam-marked))
9944         (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
9945         (setq gnus-newsgroup-expirable (delq article gnus-newsgroup-expirable))
9946         (setq gnus-newsgroup-reads (delq article gnus-newsgroup-reads))
9947         (cond ((= mark gnus-ticked-mark)
9948                (setq gnus-newsgroup-marked
9949                      (gnus-add-to-sorted-list gnus-newsgroup-marked
9950                                               article)))
9951               ((= mark gnus-spam-mark)
9952                (setq gnus-newsgroup-spam-marked
9953                      (gnus-add-to-sorted-list gnus-newsgroup-spam-marked
9954                                               article)))
9955               ((= mark gnus-dormant-mark)
9956                (setq gnus-newsgroup-dormant
9957                      (gnus-add-to-sorted-list gnus-newsgroup-dormant
9958                                               article)))
9959               (t
9960                (setq gnus-newsgroup-unreads
9961                      (gnus-add-to-sorted-list gnus-newsgroup-unreads
9962                                               article))))
9963         (gnus-pull article gnus-newsgroup-reads)
9964
9965         ;; See whether the article is to be put in the cache.
9966         (and gnus-use-cache
9967              (vectorp (gnus-summary-article-header article))
9968              (save-excursion
9969                (gnus-cache-possibly-enter-article
9970                 gnus-newsgroup-name article
9971                 (= mark gnus-ticked-mark)
9972                 (= mark gnus-dormant-mark) (= mark gnus-unread-mark))))
9973
9974         ;; Fix the mark.
9975         (gnus-summary-update-mark mark 'unread)
9976         t))))
9977
9978 (defun gnus-summary-mark-article (&optional article mark no-expire)
9979   "Mark ARTICLE with MARK.  MARK can be any character.
9980 Four MARK strings are reserved: `? ' (unread), `?!' (ticked),
9981 `??' (dormant) and `?E' (expirable).
9982 If MARK is nil, then the default character `?r' is used.
9983 If ARTICLE is nil, then the article on the current line will be
9984 marked.
9985 If NO-EXPIRE, auto-expiry will be inhibited."
9986   ;; The mark might be a string.
9987   (when (stringp mark)
9988     (setq mark (aref mark 0)))
9989   ;; If no mark is given, then we check auto-expiring.
9990   (when (null mark)
9991     (setq mark gnus-del-mark))
9992   (when (and (not no-expire)
9993              gnus-newsgroup-auto-expire
9994              (memq mark gnus-auto-expirable-marks))
9995     (setq mark gnus-expirable-mark))
9996   (let ((article (or article (gnus-summary-article-number)))
9997         (old-mark (gnus-summary-article-mark article)))
9998     ;; Allow the backend to change the mark.
9999     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10000     (if (eq mark old-mark)
10001         t
10002       (unless article
10003         (error "No article on current line"))
10004       (if (not (if (or (= mark gnus-unread-mark)
10005                        (= mark gnus-ticked-mark)
10006                        (= mark gnus-spam-mark)
10007                        (= mark gnus-dormant-mark))
10008                    (gnus-mark-article-as-unread article mark)
10009                  (gnus-mark-article-as-read article mark)))
10010           t
10011         ;; See whether the article is to be put in the cache.
10012         (and gnus-use-cache
10013              (not (= mark gnus-canceled-mark))
10014              (vectorp (gnus-summary-article-header article))
10015              (save-excursion
10016                (gnus-cache-possibly-enter-article
10017                 gnus-newsgroup-name article
10018                 (= mark gnus-ticked-mark)
10019                 (= mark gnus-dormant-mark) (= mark gnus-unread-mark))))
10020
10021         (when (gnus-summary-goto-subject article nil t)
10022           (let ((buffer-read-only nil))
10023             (gnus-summary-show-thread)
10024             ;; Fix the mark.
10025             (gnus-summary-update-mark mark 'unread)
10026             t))))))
10027
10028 (defun gnus-summary-update-secondary-mark (article)
10029   "Update the secondary (read, process, cache) mark."
10030   (gnus-summary-update-mark
10031    (cond ((memq article gnus-newsgroup-processable)
10032           gnus-process-mark)
10033          ((memq article gnus-newsgroup-cached)
10034           gnus-cached-mark)
10035          ((memq article gnus-newsgroup-replied)
10036           gnus-replied-mark)
10037          ((memq article gnus-newsgroup-forwarded)
10038           gnus-forwarded-mark)
10039          ((memq article gnus-newsgroup-saved)
10040           gnus-saved-mark)
10041          ((memq article gnus-newsgroup-recent)
10042           gnus-recent-mark)
10043          ((memq article gnus-newsgroup-unseen)
10044           gnus-unseen-mark)
10045          (t gnus-no-mark))
10046    'replied)
10047   (when (gnus-visual-p 'summary-highlight 'highlight)
10048     (gnus-run-hooks 'gnus-summary-update-hook))
10049   t)
10050
10051 (defun gnus-summary-update-download-mark (article)
10052   "Update the download mark."
10053   (gnus-summary-update-mark
10054    (cond ((memq article gnus-newsgroup-undownloaded)
10055           gnus-undownloaded-mark)
10056          (gnus-newsgroup-agentized
10057           gnus-downloaded-mark)
10058          (t
10059           gnus-no-mark))
10060    'download)
10061   (gnus-summary-update-line t)
10062   t)
10063
10064 (defun gnus-summary-update-mark (mark type)
10065   (let ((forward (cdr (assq type gnus-summary-mark-positions)))
10066         (buffer-read-only nil))
10067     (re-search-backward "[\n\r]" (gnus-point-at-bol) 'move-to-limit)
10068     (when forward
10069       (when (looking-at "\r")
10070         (incf forward))
10071       (when (<= (+ forward (point)) (point-max))
10072         ;; Go to the right position on the line.
10073         (goto-char (+ forward (point)))
10074         ;; Replace the old mark with the new mark.
10075         (subst-char-in-region (point) (1+ (point)) (char-after) mark)
10076         ;; Optionally update the marks by some user rule.
10077         (when (eq type 'unread)
10078           (gnus-data-set-mark
10079            (gnus-data-find (gnus-summary-article-number)) mark)
10080           (gnus-summary-update-line (eq mark gnus-unread-mark)))))))
10081
10082 (defun gnus-mark-article-as-read (article &optional mark)
10083   "Enter ARTICLE in the pertinent lists and remove it from others."
10084   ;; Make the article expirable.
10085   (let ((mark (or mark gnus-del-mark)))
10086     (setq gnus-newsgroup-expirable
10087           (if (= mark gnus-expirable-mark)
10088               (gnus-add-to-sorted-list gnus-newsgroup-expirable article)
10089             (delq article gnus-newsgroup-expirable)))
10090     ;; Remove from unread and marked lists.
10091     (setq gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
10092     (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
10093     (setq gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked))
10094     (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
10095     (push (cons article mark) gnus-newsgroup-reads)
10096     ;; Possibly remove from cache, if that is used.
10097     (when gnus-use-cache
10098       (gnus-cache-enter-remove-article article))
10099     t))
10100
10101 (defun gnus-mark-article-as-unread (article &optional mark)
10102   "Enter ARTICLE in the pertinent lists and remove it from others."
10103   (let ((mark (or mark gnus-ticked-mark)))
10104     (if (<= article 0)
10105         (progn
10106           (gnus-error 1 "Can't mark negative article numbers")
10107           nil)
10108       (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked)
10109             gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked)
10110             gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant)
10111             gnus-newsgroup-expirable (delq article gnus-newsgroup-expirable)
10112             gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
10113
10114       ;; Unsuppress duplicates?
10115       (when gnus-suppress-duplicates
10116         (gnus-dup-unsuppress-article article))
10117
10118       (cond ((= mark gnus-ticked-mark)
10119              (setq gnus-newsgroup-marked
10120                    (gnus-add-to-sorted-list gnus-newsgroup-marked article)))
10121             ((= mark gnus-spam-mark)
10122              (setq gnus-newsgroup-spam-marked
10123                    (gnus-add-to-sorted-list gnus-newsgroup-spam-marked
10124                                             article)))
10125             ((= mark gnus-dormant-mark)
10126              (setq gnus-newsgroup-dormant
10127                    (gnus-add-to-sorted-list gnus-newsgroup-dormant article)))
10128             (t
10129              (setq gnus-newsgroup-unreads
10130                    (gnus-add-to-sorted-list gnus-newsgroup-unreads article))))
10131       (gnus-pull article gnus-newsgroup-reads)
10132       t)))
10133
10134 (defalias 'gnus-summary-mark-as-unread-forward
10135   'gnus-summary-tick-article-forward)
10136 (make-obsolete 'gnus-summary-mark-as-unread-forward
10137                'gnus-summary-tick-article-forward)
10138 (defun gnus-summary-tick-article-forward (n)
10139   "Tick N articles forwards.
10140 If N is negative, tick backwards instead.
10141 The difference between N and the number of articles ticked is returned."
10142   (interactive "p")
10143   (gnus-summary-mark-forward n gnus-ticked-mark))
10144
10145 (defalias 'gnus-summary-mark-as-unread-backward
10146   'gnus-summary-tick-article-backward)
10147 (make-obsolete 'gnus-summary-mark-as-unread-backward
10148                'gnus-summary-tick-article-backward)
10149 (defun gnus-summary-tick-article-backward (n)
10150   "Tick N articles backwards.
10151 The difference between N and the number of articles ticked is returned."
10152   (interactive "p")
10153   (gnus-summary-mark-forward (- n) gnus-ticked-mark))
10154
10155 (defalias 'gnus-summary-mark-as-unread 'gnus-summary-tick-article)
10156 (make-obsolete 'gnus-summary-mark-as-unread 'gnus-summary-tick-article)
10157 (defun gnus-summary-tick-article (&optional article clear-mark)
10158   "Mark current article as unread.
10159 Optional 1st argument ARTICLE specifies article number to be marked as unread.
10160 Optional 2nd argument CLEAR-MARK remove any kinds of mark."
10161   (interactive)
10162   (gnus-summary-mark-article article (if clear-mark gnus-unread-mark
10163                                        gnus-ticked-mark)))
10164
10165 (defun gnus-summary-mark-as-read-forward (n)
10166   "Mark N articles as read forwards.
10167 If N is negative, mark backwards instead.
10168 The difference between N and the actual number of articles marked is
10169 returned."
10170   (interactive "p")
10171   (gnus-summary-mark-forward n gnus-del-mark gnus-inhibit-user-auto-expire))
10172
10173 (defun gnus-summary-mark-as-read-backward (n)
10174   "Mark the N articles as read backwards.
10175 The difference between N and the actual number of articles marked is
10176 returned."
10177   (interactive "p")
10178   (gnus-summary-mark-forward
10179    (- n) gnus-del-mark gnus-inhibit-user-auto-expire))
10180
10181 (defun gnus-summary-mark-as-read (&optional article mark)
10182   "Mark current article as read.
10183 ARTICLE specifies the article to be marked as read.
10184 MARK specifies a string to be inserted at the beginning of the line."
10185   (gnus-summary-mark-article article mark))
10186
10187 (defun gnus-summary-clear-mark-forward (n)
10188   "Clear marks from N articles forward.
10189 If N is negative, clear backward instead.
10190 The difference between N and the number of marks cleared is returned."
10191   (interactive "p")
10192   (gnus-summary-mark-forward n gnus-unread-mark))
10193
10194 (defun gnus-summary-clear-mark-backward (n)
10195   "Clear marks from N articles backward.
10196 The difference between N and the number of marks cleared is returned."
10197   (interactive "p")
10198   (gnus-summary-mark-forward (- n) gnus-unread-mark))
10199
10200 (defun gnus-summary-mark-unread-as-read ()
10201   "Intended to be used by `gnus-summary-mark-article-hook'."
10202   (when (memq gnus-current-article gnus-newsgroup-unreads)
10203     (gnus-summary-mark-article gnus-current-article gnus-read-mark)))
10204
10205 (defun gnus-summary-mark-read-and-unread-as-read (&optional new-mark)
10206   "Intended to be used by `gnus-summary-mark-article-hook'."
10207   (let ((mark (gnus-summary-article-mark)))
10208     (when (or (gnus-unread-mark-p mark)
10209               (gnus-read-mark-p mark))
10210       (gnus-summary-mark-article gnus-current-article
10211                                  (or new-mark gnus-read-mark)))))
10212
10213 (defun gnus-summary-mark-current-read-and-unread-as-read (&optional new-mark)
10214   "Intended to be used by `gnus-summary-mark-article-hook'."
10215   (let ((mark (gnus-summary-article-mark)))
10216     (when (or (gnus-unread-mark-p mark)
10217               (gnus-read-mark-p mark))
10218       (gnus-summary-mark-article (gnus-summary-article-number)
10219                                  (or new-mark gnus-read-mark)))))
10220
10221 (defun gnus-summary-mark-unread-as-ticked ()
10222   "Intended to be used by `gnus-summary-mark-article-hook'."
10223   (when (memq gnus-current-article gnus-newsgroup-unreads)
10224     (gnus-summary-mark-article gnus-current-article gnus-ticked-mark)))
10225
10226 (defun gnus-summary-mark-region-as-read (point mark all)
10227   "Mark all unread articles between point and mark as read.
10228 If given a prefix, mark all articles between point and mark as read,
10229 even ticked and dormant ones."
10230   (interactive "r\nP")
10231   (save-excursion
10232     (let (article)
10233       (goto-char point)
10234       (beginning-of-line)
10235       (while (and
10236               (< (point) mark)
10237               (progn
10238                 (when (or all
10239                           (memq (setq article (gnus-summary-article-number))
10240                                 gnus-newsgroup-unreads))
10241                   (gnus-summary-mark-article article gnus-del-mark))
10242                 t)
10243               (gnus-summary-find-next))))))
10244
10245 (defun gnus-summary-mark-below (score mark)
10246   "Mark articles with score less than SCORE with MARK."
10247   (interactive "P\ncMark: ")
10248   (setq score (if score
10249                   (prefix-numeric-value score)
10250                 (or gnus-summary-default-score 0)))
10251   (save-excursion
10252     (set-buffer gnus-summary-buffer)
10253     (goto-char (point-min))
10254     (while
10255         (progn
10256           (and (< (gnus-summary-article-score) score)
10257                (gnus-summary-mark-article nil mark))
10258           (gnus-summary-find-next)))))
10259
10260 (defun gnus-summary-kill-below (&optional score)
10261   "Mark articles with score below SCORE as read."
10262   (interactive "P")
10263   (gnus-summary-mark-below score gnus-killed-mark))
10264
10265 (defun gnus-summary-clear-above (&optional score)
10266   "Clear all marks from articles with score above SCORE."
10267   (interactive "P")
10268   (gnus-summary-mark-above score gnus-unread-mark))
10269
10270 (defun gnus-summary-tick-above (&optional score)
10271   "Tick all articles with score above SCORE."
10272   (interactive "P")
10273   (gnus-summary-mark-above score gnus-ticked-mark))
10274
10275 (defun gnus-summary-mark-above (score mark)
10276   "Mark articles with score over SCORE with MARK."
10277   (interactive "P\ncMark: ")
10278   (setq score (if score
10279                   (prefix-numeric-value score)
10280                 (or gnus-summary-default-score 0)))
10281   (save-excursion
10282     (set-buffer gnus-summary-buffer)
10283     (goto-char (point-min))
10284     (while (and (progn
10285                   (when (> (gnus-summary-article-score) score)
10286                     (gnus-summary-mark-article nil mark))
10287                   t)
10288                 (gnus-summary-find-next)))))
10289
10290 ;; Suggested by Daniel Quinlan <quinlan@best.com>.
10291 (defalias 'gnus-summary-show-all-expunged 'gnus-summary-limit-include-expunged)
10292 (defun gnus-summary-limit-include-expunged (&optional no-error)
10293   "Display all the hidden articles that were expunged for low scores."
10294   (interactive)
10295   (let ((buffer-read-only nil))
10296     (let ((scored gnus-newsgroup-scored)
10297           headers h)
10298       (while scored
10299         (unless (gnus-summary-article-header (caar scored))
10300           (and (setq h (gnus-number-to-header (caar scored)))
10301                (< (cdar scored) gnus-summary-expunge-below)
10302                (push h headers)))
10303         (setq scored (cdr scored)))
10304       (if (not headers)
10305           (when (not no-error)
10306             (error "No expunged articles hidden"))
10307         (goto-char (point-min))
10308         (push gnus-newsgroup-limit gnus-newsgroup-limits)
10309         (setq gnus-newsgroup-limit (copy-sequence gnus-newsgroup-limit))
10310         (mapcar (lambda (x) (push (mail-header-number x)
10311                                   gnus-newsgroup-limit))
10312                 headers)
10313         (gnus-summary-prepare-unthreaded (nreverse headers))
10314         (goto-char (point-min))
10315         (gnus-summary-position-point)
10316         t))))
10317
10318 (defun gnus-summary-catchup (&optional all quietly to-here not-mark reverse)
10319   "Mark all unread articles in this newsgroup as read.
10320 If prefix argument ALL is non-nil, ticked and dormant articles will
10321 also be marked as read.
10322 If QUIETLY is non-nil, no questions will be asked.
10323
10324 If TO-HERE is non-nil, it should be a point in the buffer.  All
10325 articles before (after, if REVERSE is set) this point will be marked
10326 as read.
10327
10328 Note that this function will only catch up the unread article
10329 in the current summary buffer limitation.
10330
10331 The number of articles marked as read is returned."
10332   (interactive "P")
10333   (prog1
10334       (save-excursion
10335         (when (or quietly
10336                   (not gnus-interactive-catchup) ;Without confirmation?
10337                   gnus-expert-user
10338                   (gnus-y-or-n-p
10339                    (if all
10340                        "Mark absolutely all articles as read? "
10341                      "Mark all unread articles as read? ")))
10342           (if (and not-mark
10343                    (not gnus-newsgroup-adaptive)
10344                    (not gnus-newsgroup-auto-expire)
10345                    (not gnus-suppress-duplicates)
10346                    (or (not gnus-use-cache)
10347                        (eq gnus-use-cache 'passive)))
10348               (progn
10349                 (when all
10350                   (setq gnus-newsgroup-marked nil
10351                         gnus-newsgroup-spam-marked nil
10352                         gnus-newsgroup-dormant nil))
10353                 (setq gnus-newsgroup-unreads
10354                       (gnus-sorted-nunion
10355                        (gnus-intersection gnus-newsgroup-unreads
10356                                           gnus-newsgroup-downloadable)
10357                        gnus-newsgroup-unfetched)))
10358             ;; We actually mark all articles as canceled, which we
10359             ;; have to do when using auto-expiry or adaptive scoring.
10360             (gnus-summary-show-all-threads)
10361             (if (and to-here reverse)
10362                 (progn
10363                   (goto-char to-here)
10364                   (gnus-summary-mark-current-read-and-unread-as-read
10365                    gnus-catchup-mark)
10366                   (while (gnus-summary-find-next (not all))
10367                     (gnus-summary-mark-article-as-read gnus-catchup-mark)))
10368               (when (gnus-summary-first-subject (not all))
10369                 (while (and
10370                         (if to-here (< (point) to-here) t)
10371                         (gnus-summary-mark-article-as-read gnus-catchup-mark)
10372                         (gnus-summary-find-next (not all))))))
10373             (gnus-set-mode-line 'summary))
10374           t))
10375     (gnus-summary-position-point)))
10376
10377 (defun gnus-summary-catchup-to-here (&optional all)
10378   "Mark all unticked articles before the current one as read.
10379 If ALL is non-nil, also mark ticked and dormant articles as read."
10380   (interactive "P")
10381   (save-excursion
10382     (gnus-save-hidden-threads
10383       (let ((beg (point)))
10384         ;; We check that there are unread articles.
10385         (when (or all (gnus-summary-find-prev))
10386           (gnus-summary-catchup all t beg)))))
10387   (gnus-summary-position-point))
10388
10389 (defun gnus-summary-catchup-from-here (&optional all)
10390   "Mark all unticked articles after (and including) the current one as read.
10391 If ALL is non-nil, also mark ticked and dormant articles as read."
10392   (interactive "P")
10393   (save-excursion
10394     (gnus-save-hidden-threads
10395       (let ((beg (point)))
10396         ;; We check that there are unread articles.
10397         (when (or all (gnus-summary-find-next))
10398           (gnus-summary-catchup all t beg nil t)))))
10399   (gnus-summary-position-point))
10400
10401 (defun gnus-summary-catchup-all (&optional quietly)
10402   "Mark all articles in this newsgroup as read.
10403 This command is dangerous.  Normally, you want \\[gnus-summary-catchup]
10404 instead, which marks only unread articles as read."
10405   (interactive "P")
10406   (gnus-summary-catchup t quietly))
10407
10408 (defun gnus-summary-catchup-and-exit (&optional all quietly)
10409   "Mark all unread articles in this group as read, then exit.
10410 If prefix argument ALL is non-nil, all articles are marked as read.
10411 If QUIETLY is non-nil, no questions will be asked."
10412   (interactive "P")
10413   (when (gnus-summary-catchup all quietly nil 'fast)
10414     ;; Select next newsgroup or exit.
10415     (if (and (not (gnus-group-quit-config gnus-newsgroup-name))
10416              (eq gnus-auto-select-next 'quietly))
10417         (gnus-summary-next-group nil)
10418       (gnus-summary-exit))))
10419
10420 (defun gnus-summary-catchup-all-and-exit (&optional quietly)
10421   "Mark all articles in this newsgroup as read, and then exit.
10422 This command is dangerous.  Normally, you want \\[gnus-summary-catchup-and-exit]
10423 instead, which marks only unread articles as read."
10424   (interactive "P")
10425   (gnus-summary-catchup-and-exit t quietly))
10426
10427 (defun gnus-summary-catchup-and-goto-next-group (&optional all)
10428   "Mark all articles in this group as read and select the next group.
10429 If given a prefix, mark all articles, unread as well as ticked, as
10430 read."
10431   (interactive "P")
10432   (save-excursion
10433     (gnus-summary-catchup all))
10434   (gnus-summary-next-group))
10435
10436 ;;;
10437 ;;; with article
10438 ;;;
10439
10440 (defmacro gnus-with-article (article &rest forms)
10441   "Select ARTICLE and perform FORMS in the original article buffer.
10442 Then replace the article with the result."
10443   `(progn
10444      ;; We don't want the article to be marked as read.
10445      (let (gnus-mark-article-hook)
10446        (gnus-summary-select-article t t nil ,article))
10447      (set-buffer gnus-original-article-buffer)
10448      ,@forms
10449      (if (not (gnus-check-backend-function
10450                'request-replace-article (car gnus-article-current)))
10451          (gnus-message 5 "Read-only group; not replacing")
10452        (unless (gnus-request-replace-article
10453                 ,article (car gnus-article-current)
10454                 (current-buffer) t)
10455          (error "Couldn't replace article")))
10456      ;; The cache and backlog have to be flushed somewhat.
10457      (when gnus-keep-backlog
10458        (gnus-backlog-remove-article
10459         (car gnus-article-current) (cdr gnus-article-current)))
10460      (when gnus-use-cache
10461        (gnus-cache-update-article
10462         (car gnus-article-current) (cdr gnus-article-current)))))
10463
10464 (put 'gnus-with-article 'lisp-indent-function 1)
10465 (put 'gnus-with-article 'edebug-form-spec '(form body))
10466
10467 ;; Thread-based commands.
10468
10469 (defun gnus-summary-articles-in-thread (&optional article)
10470   "Return a list of all articles in the current thread.
10471 If ARTICLE is non-nil, return all articles in the thread that starts
10472 with that article."
10473   (let* ((article (or article (gnus-summary-article-number)))
10474          (data (gnus-data-find-list article))
10475          (top-level (gnus-data-level (car data)))
10476          (top-subject
10477           (cond ((null gnus-thread-operation-ignore-subject)
10478                  (gnus-simplify-subject-re
10479                   (mail-header-subject (gnus-data-header (car data)))))
10480                 ((eq gnus-thread-operation-ignore-subject 'fuzzy)
10481                  (gnus-simplify-subject-fuzzy
10482                   (mail-header-subject (gnus-data-header (car data)))))
10483                 (t nil)))
10484          (end-point (save-excursion
10485                       (if (gnus-summary-go-to-next-thread)
10486                           (point) (point-max))))
10487          articles)
10488     (while (and data
10489                 (< (gnus-data-pos (car data)) end-point))
10490       (when (or (not top-subject)
10491                 (string= top-subject
10492                          (if (eq gnus-thread-operation-ignore-subject 'fuzzy)
10493                              (gnus-simplify-subject-fuzzy
10494                               (mail-header-subject
10495                                (gnus-data-header (car data))))
10496                            (gnus-simplify-subject-re
10497                             (mail-header-subject
10498                              (gnus-data-header (car data)))))))
10499         (push (gnus-data-number (car data)) articles))
10500       (unless (and (setq data (cdr data))
10501                    (> (gnus-data-level (car data)) top-level))
10502         (setq data nil)))
10503     ;; Return the list of articles.
10504     (nreverse articles)))
10505
10506 (defun gnus-summary-rethread-current ()
10507   "Rethread the thread the current article is part of."
10508   (interactive)
10509   (let* ((gnus-show-threads t)
10510          (article (gnus-summary-article-number))
10511          (id (mail-header-id (gnus-summary-article-header)))
10512          (gnus-newsgroup-threads (list (gnus-id-to-thread (gnus-root-id id)))))
10513     (unless id
10514       (error "No article on the current line"))
10515     (gnus-rebuild-thread id)
10516     (gnus-summary-goto-subject article)))
10517
10518 (defun gnus-summary-reparent-thread ()
10519   "Make the current article child of the marked (or previous) article.
10520
10521 Note that the re-threading will only work if `gnus-thread-ignore-subject'
10522 is non-nil or the Subject: of both articles are the same."
10523   (interactive)
10524   (unless (not (gnus-group-read-only-p))
10525     (error "The current newsgroup does not support article editing"))
10526   (unless (<= (length gnus-newsgroup-processable) 1)
10527     (error "No more than one article may be marked"))
10528   (save-window-excursion
10529     (let ((gnus-article-buffer " *reparent*")
10530           (current-article (gnus-summary-article-number))
10531           ;; First grab the marked article, otherwise one line up.
10532           (parent-article (if (not (null gnus-newsgroup-processable))
10533                               (car gnus-newsgroup-processable)
10534                             (save-excursion
10535                               (if (eq (forward-line -1) 0)
10536                                   (gnus-summary-article-number)
10537                                 (error "Beginning of summary buffer"))))))
10538       (unless (not (eq current-article parent-article))
10539         (error "An article may not be self-referential"))
10540       (let ((message-id (mail-header-id
10541                          (gnus-summary-article-header parent-article))))
10542         (unless (and message-id (not (equal message-id "")))
10543           (error "No message-id in desired parent"))
10544         (gnus-with-article current-article
10545           (save-restriction
10546             (goto-char (point-min))
10547             (message-narrow-to-head)
10548             (if (re-search-forward "^References: " nil t)
10549                 (progn
10550                   (re-search-forward "^[^ \t]" nil t)
10551                   (forward-line -1)
10552                   (end-of-line)
10553                   (insert " " message-id))
10554               (insert "References: " message-id "\n"))))
10555         (set-buffer gnus-summary-buffer)
10556         (gnus-summary-unmark-all-processable)
10557         (gnus-summary-update-article current-article)
10558         (if (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
10559             (gnus-summary-update-secondary-mark (cdr gnus-article-current)))
10560         (gnus-summary-rethread-current)
10561         (gnus-message 3 "Article %d is now the child of article %d"
10562                       current-article parent-article)))))
10563
10564 (defun gnus-summary-toggle-threads (&optional arg)
10565   "Toggle showing conversation threads.
10566 If ARG is positive number, turn showing conversation threads on."
10567   (interactive "P")
10568   (let ((current (or (gnus-summary-article-number) gnus-newsgroup-end)))
10569     (setq gnus-show-threads
10570           (if (null arg) (not gnus-show-threads)
10571             (> (prefix-numeric-value arg) 0)))
10572     (gnus-summary-prepare)
10573     (gnus-summary-goto-subject current)
10574     (gnus-message 6 "Threading is now %s" (if gnus-show-threads "on" "off"))
10575     (gnus-summary-position-point)))
10576
10577 (defun gnus-summary-show-all-threads ()
10578   "Show all threads."
10579   (interactive)
10580   (save-excursion
10581     (let ((buffer-read-only nil))
10582       (subst-char-in-region (point-min) (point-max) ?\^M ?\n t)))
10583   (gnus-summary-position-point))
10584
10585 (defun gnus-summary-show-thread ()
10586   "Show thread subtrees.
10587 Returns nil if no thread was there to be shown."
10588   (interactive)
10589   (let ((buffer-read-only nil)
10590         (orig (point))
10591         (end (gnus-point-at-eol))
10592         ;; Leave point at bol
10593         (beg (progn (beginning-of-line) (point))))
10594     (prog1
10595         ;; Any hidden lines here?
10596         (search-forward "\r" end t)
10597       (subst-char-in-region beg end ?\^M ?\n t)
10598       (goto-char orig)
10599       (gnus-summary-position-point))))
10600
10601 (defun gnus-summary-maybe-hide-threads ()
10602   "If requested, hide the threads that should be hidden."
10603   (when (and gnus-show-threads
10604              gnus-thread-hide-subtree)
10605     (gnus-summary-hide-all-threads
10606      (if (or (consp gnus-thread-hide-subtree)
10607              (functionp gnus-thread-hide-subtree))
10608          (gnus-make-predicate gnus-thread-hide-subtree)
10609        nil))))
10610
10611 ;;; Hiding predicates.
10612
10613 (defun gnus-article-unread-p (header)
10614   (memq (mail-header-number header) gnus-newsgroup-unreads))
10615
10616 (defun gnus-article-unseen-p (header)
10617   (memq (mail-header-number header) gnus-newsgroup-unseen))
10618
10619 (defun gnus-map-articles (predicate articles)
10620   "Map PREDICATE over ARTICLES and return non-nil if any predicate is non-nil."
10621   (apply 'gnus-or (mapcar predicate
10622                           (mapcar 'gnus-summary-article-header articles))))
10623
10624 (defun gnus-summary-hide-all-threads (&optional predicate)
10625   "Hide all thread subtrees.
10626 If PREDICATE is supplied, threads that satisfy this predicate
10627 will not be hidden."
10628   (interactive)
10629   (save-excursion
10630     (goto-char (point-min))
10631     (let ((end nil))
10632       (while (not end)
10633         (when (or (not predicate)
10634                   (gnus-map-articles
10635                    predicate (gnus-summary-article-children)))
10636             (gnus-summary-hide-thread))
10637         (setq end (not (zerop (gnus-summary-next-thread 1 t)))))))
10638   (gnus-summary-position-point))
10639
10640 (defun gnus-summary-hide-thread ()
10641   "Hide thread subtrees.
10642 If PREDICATE is supplied, threads that satisfy this predicate
10643 will not be hidden.
10644 Returns nil if no threads were there to be hidden."
10645   (interactive)
10646   (let ((buffer-read-only nil)
10647         (start (point))
10648         (article (gnus-summary-article-number)))
10649     (goto-char start)
10650     ;; Go forward until either the buffer ends or the subthread
10651     ;; ends.
10652     (when (and (not (eobp))
10653                (or (zerop (gnus-summary-next-thread 1 t))
10654                    (goto-char (point-max))))
10655       (prog1
10656           (if (and (> (point) start)
10657                    (search-backward "\n" start t))
10658               (progn
10659                 (subst-char-in-region start (point) ?\n ?\^M)
10660                 (gnus-summary-goto-subject article))
10661             (goto-char start)
10662             nil)))))
10663
10664 (defun gnus-summary-go-to-next-thread (&optional previous)
10665   "Go to the same level (or less) next thread.
10666 If PREVIOUS is non-nil, go to previous thread instead.
10667 Return the article number moved to, or nil if moving was impossible."
10668   (let ((level (gnus-summary-thread-level))
10669         (way (if previous -1 1))
10670         (beg (point)))
10671     (forward-line way)
10672     (while (and (not (eobp))
10673                 (< level (gnus-summary-thread-level)))
10674       (forward-line way))
10675     (if (eobp)
10676         (progn
10677           (goto-char beg)
10678           nil)
10679       (setq beg (point))
10680       (prog1
10681           (gnus-summary-article-number)
10682         (goto-char beg)))))
10683
10684 (defun gnus-summary-next-thread (n &optional silent)
10685   "Go to the same level next N'th thread.
10686 If N is negative, search backward instead.
10687 Returns the difference between N and the number of skips actually
10688 done.
10689
10690 If SILENT, don't output messages."
10691   (interactive "p")
10692   (let ((backward (< n 0))
10693         (n (abs n)))
10694     (while (and (> n 0)
10695                 (gnus-summary-go-to-next-thread backward))
10696       (decf n))
10697     (unless silent
10698       (gnus-summary-position-point))
10699     (when (and (not silent) (/= 0 n))
10700       (gnus-message 7 "No more threads"))
10701     n))
10702
10703 (defun gnus-summary-prev-thread (n)
10704   "Go to the same level previous N'th thread.
10705 Returns the difference between N and the number of skips actually
10706 done."
10707   (interactive "p")
10708   (gnus-summary-next-thread (- n)))
10709
10710 (defun gnus-summary-go-down-thread ()
10711   "Go down one level in the current thread."
10712   (let ((children (gnus-summary-article-children)))
10713     (when children
10714       (gnus-summary-goto-subject (car children)))))
10715
10716 (defun gnus-summary-go-up-thread ()
10717   "Go up one level in the current thread."
10718   (let ((parent (gnus-summary-article-parent)))
10719     (when parent
10720       (gnus-summary-goto-subject parent))))
10721
10722 (defun gnus-summary-down-thread (n)
10723   "Go down thread N steps.
10724 If N is negative, go up instead.
10725 Returns the difference between N and how many steps down that were
10726 taken."
10727   (interactive "p")
10728   (let ((up (< n 0))
10729         (n (abs n)))
10730     (while (and (> n 0)
10731                 (if up (gnus-summary-go-up-thread)
10732                   (gnus-summary-go-down-thread)))
10733       (setq n (1- n)))
10734     (gnus-summary-position-point)
10735     (when (/= 0 n)
10736       (gnus-message 7 "Can't go further"))
10737     n))
10738
10739 (defun gnus-summary-up-thread (n)
10740   "Go up thread N steps.
10741 If N is negative, go down instead.
10742 Returns the difference between N and how many steps down that were
10743 taken."
10744   (interactive "p")
10745   (gnus-summary-down-thread (- n)))
10746
10747 (defun gnus-summary-top-thread ()
10748   "Go to the top of the thread."
10749   (interactive)
10750   (while (gnus-summary-go-up-thread))
10751   (gnus-summary-article-number))
10752
10753 (defun gnus-summary-kill-thread (&optional unmark)
10754   "Mark articles under current thread as read.
10755 If the prefix argument is positive, remove any kinds of marks.
10756 If the prefix argument is negative, tick articles instead."
10757   (interactive "P")
10758   (when unmark
10759     (setq unmark (prefix-numeric-value unmark)))
10760   (let ((articles (gnus-summary-articles-in-thread)))
10761     (save-excursion
10762       ;; Expand the thread.
10763       (gnus-summary-show-thread)
10764       ;; Mark all the articles.
10765       (while articles
10766         (gnus-summary-goto-subject (car articles))
10767         (cond ((null unmark)
10768                (gnus-summary-mark-article-as-read gnus-killed-mark))
10769               ((> unmark 0)
10770                (gnus-summary-mark-article-as-unread gnus-unread-mark))
10771               (t
10772                (gnus-summary-mark-article-as-unread gnus-ticked-mark)))
10773         (setq articles (cdr articles))))
10774     ;; Hide killed subtrees.
10775     (and (null unmark)
10776          gnus-thread-hide-killed
10777          (gnus-summary-hide-thread))
10778     ;; If marked as read, go to next unread subject.
10779     (when (null unmark)
10780       ;; Go to next unread subject.
10781       (gnus-summary-next-subject 1 t)))
10782   (gnus-set-mode-line 'summary))
10783
10784 ;; Summary sorting commands
10785
10786 (defun gnus-summary-sort-by-number (&optional reverse)
10787   "Sort the summary buffer by article number.
10788 Argument REVERSE means reverse order."
10789   (interactive "P")
10790   (gnus-summary-sort 'number reverse))
10791
10792 (defun gnus-summary-sort-by-random (&optional reverse)
10793   "Randomize the order in the summary buffer.
10794 Argument REVERSE means to randomize in reverse order."
10795   (interactive "P")
10796   (gnus-summary-sort 'random reverse))
10797
10798 (defun gnus-summary-sort-by-author (&optional reverse)
10799   "Sort the summary buffer by author name alphabetically.
10800 If `case-fold-search' is non-nil, case of letters is ignored.
10801 Argument REVERSE means reverse order."
10802   (interactive "P")
10803   (gnus-summary-sort 'author reverse))
10804
10805 (defun gnus-summary-sort-by-subject (&optional reverse)
10806   "Sort the summary buffer by subject alphabetically.  `Re:'s are ignored.
10807 If `case-fold-search' is non-nil, case of letters is ignored.
10808 Argument REVERSE means reverse order."
10809   (interactive "P")
10810   (gnus-summary-sort 'subject reverse))
10811
10812 (defun gnus-summary-sort-by-date (&optional reverse)
10813   "Sort the summary buffer by date.
10814 Argument REVERSE means reverse order."
10815   (interactive "P")
10816   (gnus-summary-sort 'date reverse))
10817
10818 (defun gnus-summary-sort-by-score (&optional reverse)
10819   "Sort the summary buffer by score.
10820 Argument REVERSE means reverse order."
10821   (interactive "P")
10822   (gnus-summary-sort 'score reverse))
10823
10824 (defun gnus-summary-sort-by-lines (&optional reverse)
10825   "Sort the summary buffer by the number of lines.
10826 Argument REVERSE means reverse order."
10827   (interactive "P")
10828   (gnus-summary-sort 'lines reverse))
10829
10830 (defun gnus-summary-sort-by-chars (&optional reverse)
10831   "Sort the summary buffer by article length.
10832 Argument REVERSE means reverse order."
10833   (interactive "P")
10834   (gnus-summary-sort 'chars reverse))
10835
10836 (defun gnus-summary-sort-by-original (&optional reverse)
10837   "Sort the summary buffer using the default sorting method.
10838 Argument REVERSE means reverse order."
10839   (interactive "P")
10840   (let* ((buffer-read-only)
10841          (gnus-summary-prepare-hook nil))
10842     ;; We do the sorting by regenerating the threads.
10843     (gnus-summary-prepare)
10844     ;; Hide subthreads if needed.
10845     (gnus-summary-maybe-hide-threads)))
10846
10847 (defun gnus-summary-sort (predicate reverse)
10848   "Sort summary buffer by PREDICATE.  REVERSE means reverse order."
10849   (let* ((thread (intern (format "gnus-thread-sort-by-%s" predicate)))
10850          (article (intern (format "gnus-article-sort-by-%s" predicate)))
10851          (gnus-thread-sort-functions
10852           (if (not reverse)
10853               thread
10854             `(lambda (t1 t2)
10855                (,thread t2 t1))))
10856          (gnus-sort-gathered-threads-function
10857           gnus-thread-sort-functions)
10858          (gnus-article-sort-functions
10859           (if (not reverse)
10860               article
10861             `(lambda (t1 t2)
10862                (,article t2 t1))))
10863          (buffer-read-only)
10864          (gnus-summary-prepare-hook nil))
10865     ;; We do the sorting by regenerating the threads.
10866     (gnus-summary-prepare)
10867     ;; Hide subthreads if needed.
10868     (gnus-summary-maybe-hide-threads)))
10869
10870 ;; Summary saving commands.
10871
10872 (defun gnus-summary-save-article (&optional n not-saved)
10873   "Save the current article using the default saver function.
10874 If N is a positive number, save the N next articles.
10875 If N is a negative number, save the N previous articles.
10876 If N is nil and any articles have been marked with the process mark,
10877 save those articles instead.
10878 The variable `gnus-default-article-saver' specifies the saver function."
10879   (interactive "P")
10880   (let* ((articles (gnus-summary-work-articles n))
10881          (save-buffer (save-excursion
10882                         (nnheader-set-temp-buffer " *Gnus Save*")))
10883          (num (length articles))
10884          header file)
10885     (dolist (article articles)
10886       (setq header (gnus-summary-article-header article))
10887       (if (not (vectorp header))
10888           ;; This is a pseudo-article.
10889           (if (assq 'name header)
10890               (gnus-copy-file (cdr (assq 'name header)))
10891             (gnus-message 1 "Article %d is unsaveable" article))
10892         ;; This is a real article.
10893         (save-window-excursion
10894           (let ((gnus-display-mime-function nil)
10895                 (gnus-article-prepare-hook nil))
10896             (gnus-summary-select-article t nil nil article)))
10897         (save-excursion
10898           (set-buffer save-buffer)
10899           (erase-buffer)
10900           (insert-buffer-substring gnus-original-article-buffer))
10901         (setq file (gnus-article-save save-buffer file num))
10902         (gnus-summary-remove-process-mark article)
10903         (unless not-saved
10904           (gnus-summary-set-saved-mark article))))
10905     (gnus-kill-buffer save-buffer)
10906     (gnus-summary-position-point)
10907     (gnus-set-mode-line 'summary)
10908     n))
10909
10910 (defun gnus-summary-pipe-output (&optional arg headers)
10911   "Pipe the current article to a subprocess.
10912 If N is a positive number, pipe the N next articles.
10913 If N is a negative number, pipe the N previous articles.
10914 If N is nil and any articles have been marked with the process mark,
10915 pipe those articles instead.
10916 If HEADERS (the symbolic prefix), include the headers, too."
10917   (interactive (gnus-interactive "P\ny"))
10918   (require 'gnus-art)
10919   (let ((gnus-default-article-saver 'gnus-summary-save-in-pipe)
10920         (gnus-save-all-headers (or headers gnus-save-all-headers)))
10921     (gnus-summary-save-article arg t))
10922   (let ((buffer (get-buffer "*Shell Command Output*")))
10923     (when (and buffer
10924                (not (zerop (buffer-size buffer))))
10925       (gnus-configure-windows 'pipe))))
10926
10927 (defun gnus-summary-save-article-mail (&optional arg)
10928   "Append the current article to an mail file.
10929 If N is a positive number, save the N next articles.
10930 If N is a negative number, save the N previous articles.
10931 If N is nil and any articles have been marked with the process mark,
10932 save those articles instead."
10933   (interactive "P")
10934   (require 'gnus-art)
10935   (let ((gnus-default-article-saver 'gnus-summary-save-in-mail))
10936     (gnus-summary-save-article arg)))
10937
10938 (defun gnus-summary-save-article-rmail (&optional arg)
10939   "Append the current article to an rmail file.
10940 If N is a positive number, save the N next articles.
10941 If N is a negative number, save the N previous articles.
10942 If N is nil and any articles have been marked with the process mark,
10943 save those articles instead."
10944   (interactive "P")
10945   (require 'gnus-art)
10946   (let ((gnus-default-article-saver 'gnus-summary-save-in-rmail))
10947     (gnus-summary-save-article arg)))
10948
10949 (defun gnus-summary-save-article-file (&optional arg)
10950   "Append the current article to a file.
10951 If N is a positive number, save the N next articles.
10952 If N is a negative number, save the N previous articles.
10953 If N is nil and any articles have been marked with the process mark,
10954 save those articles instead."
10955   (interactive "P")
10956   (require 'gnus-art)
10957   (let ((gnus-default-article-saver 'gnus-summary-save-in-file))
10958     (gnus-summary-save-article arg)))
10959
10960 (defun gnus-summary-write-article-file (&optional arg)
10961   "Write the current article to a file, deleting the previous file.
10962 If N is a positive number, save the N next articles.
10963 If N is a negative number, save the N previous articles.
10964 If N is nil and any articles have been marked with the process mark,
10965 save those articles instead."
10966   (interactive "P")
10967   (require 'gnus-art)
10968   (let ((gnus-default-article-saver 'gnus-summary-write-to-file))
10969     (gnus-summary-save-article arg)))
10970
10971 (defun gnus-summary-save-article-body-file (&optional arg)
10972   "Append the current article body to a file.
10973 If N is a positive number, save the N next articles.
10974 If N is a negative number, save the N previous articles.
10975 If N is nil and any articles have been marked with the process mark,
10976 save those articles instead."
10977   (interactive "P")
10978   (require 'gnus-art)
10979   (let ((gnus-default-article-saver 'gnus-summary-save-body-in-file))
10980     (gnus-summary-save-article arg)))
10981
10982 (defun gnus-summary-muttprint (&optional arg)
10983   "Print the current article using Muttprint.
10984 If N is a positive number, save the N next articles.
10985 If N is a negative number, save the N previous articles.
10986 If N is nil and any articles have been marked with the process mark,
10987 save those articles instead."
10988   (interactive "P")
10989   (require 'gnus-art)
10990   (let ((gnus-default-article-saver 'gnus-summary-pipe-to-muttprint))
10991     (gnus-summary-save-article arg t)))
10992
10993 (defun gnus-summary-pipe-message (program)
10994   "Pipe the current article through PROGRAM."
10995   (interactive "sProgram: ")
10996   (gnus-summary-select-article)
10997   (let ((mail-header-separator ""))
10998     (gnus-eval-in-buffer-window gnus-article-buffer
10999       (save-restriction
11000         (widen)
11001         (let ((start (window-start))
11002               buffer-read-only)
11003           (message-pipe-buffer-body program)
11004           (set-window-start (get-buffer-window (current-buffer)) start))))))
11005
11006 (defun gnus-get-split-value (methods)
11007   "Return a value based on the split METHODS."
11008   (let (split-name method result match)
11009     (when methods
11010       (save-excursion
11011         (set-buffer gnus-original-article-buffer)
11012         (save-restriction
11013           (nnheader-narrow-to-headers)
11014           (while (and methods (not split-name))
11015             (goto-char (point-min))
11016             (setq method (pop methods))
11017             (setq match (car method))
11018             (when (cond
11019                    ((stringp match)
11020                     ;; Regular expression.
11021                     (ignore-errors
11022                       (re-search-forward match nil t)))
11023                    ((functionp match)
11024                     ;; Function.
11025                     (save-restriction
11026                       (widen)
11027                       (setq result (funcall match gnus-newsgroup-name))))
11028                    ((consp match)
11029                     ;; Form.
11030                     (save-restriction
11031                       (widen)
11032                       (setq result (eval match)))))
11033               (setq split-name (cdr method))
11034               (cond ((stringp result)
11035                      (push (expand-file-name
11036                             result gnus-article-save-directory)
11037                            split-name))
11038                     ((consp result)
11039                      (setq split-name (append result split-name)))))))))
11040     (nreverse split-name)))
11041
11042 (defun gnus-valid-move-group-p (group)
11043   (and (boundp group)
11044        (symbol-name group)
11045        (symbol-value group)
11046        (gnus-get-function (gnus-find-method-for-group
11047                            (symbol-name group)) 'request-accept-article t)))
11048
11049 (defun gnus-read-move-group-name (prompt default articles prefix)
11050   "Read a group name."
11051   (let* ((split-name (gnus-get-split-value gnus-move-split-methods))
11052          (minibuffer-confirm-incomplete nil) ; XEmacs
11053          (prom
11054           (format "%s %s to"
11055                   prompt
11056                   (if (> (length articles) 1)
11057                       (format "these %d articles" (length articles))
11058                     "this article")))
11059          (to-newsgroup
11060           (cond
11061            ((null split-name)
11062             (gnus-completing-read-with-default
11063              default prom
11064              gnus-active-hashtb
11065              'gnus-valid-move-group-p
11066              nil prefix
11067              'gnus-group-history))
11068            ((= 1 (length split-name))
11069             (gnus-completing-read-with-default
11070              (car split-name) prom
11071              gnus-active-hashtb
11072              'gnus-valid-move-group-p
11073              nil nil
11074              'gnus-group-history))
11075            (t
11076             (gnus-completing-read-with-default
11077              nil prom
11078              (mapcar (lambda (el) (list el))
11079                      (nreverse split-name))
11080              nil nil nil
11081              'gnus-group-history))))
11082          (to-method (gnus-server-to-method (gnus-group-method to-newsgroup))))
11083     (when to-newsgroup
11084       (if (or (string= to-newsgroup "")
11085               (string= to-newsgroup prefix))
11086           (setq to-newsgroup default))
11087       (unless to-newsgroup
11088         (error "No group name entered"))
11089       (or (gnus-active to-newsgroup)
11090           (gnus-activate-group to-newsgroup nil nil to-method)
11091           (if (gnus-y-or-n-p (format "No such group: %s.  Create it? "
11092                                      to-newsgroup))
11093               (or (and (gnus-request-create-group to-newsgroup to-method)
11094                        (gnus-activate-group
11095                         to-newsgroup nil nil to-method)
11096                        (gnus-subscribe-group to-newsgroup))
11097                   (error "Couldn't create group %s" to-newsgroup)))
11098           (error "No such group: %s" to-newsgroup)))
11099     to-newsgroup))
11100
11101 (defun gnus-summary-save-parts (type dir n &optional reverse)
11102   "Save parts matching TYPE to DIR.
11103 If REVERSE, save parts that do not match TYPE."
11104   (interactive
11105    (list (read-string "Save parts of type: "
11106                       (or (car gnus-summary-save-parts-type-history)
11107                           gnus-summary-save-parts-default-mime)
11108                       'gnus-summary-save-parts-type-history)
11109          (setq gnus-summary-save-parts-last-directory
11110                (read-file-name "Save to directory: "
11111                                gnus-summary-save-parts-last-directory
11112                                nil t))
11113          current-prefix-arg))
11114   (gnus-summary-iterate n
11115     (let ((gnus-display-mime-function nil)
11116           (gnus-inhibit-treatment t))
11117       (gnus-summary-select-article))
11118     (save-excursion
11119       (set-buffer gnus-article-buffer)
11120       (let ((handles (or gnus-article-mime-handles
11121                          (mm-dissect-buffer nil gnus-article-loose-mime)
11122                          (and gnus-article-emulate-mime
11123                               (mm-uu-dissect)))))
11124         (when handles
11125           (gnus-summary-save-parts-1 type dir handles reverse)
11126           (unless gnus-article-mime-handles ;; Don't destroy this case.
11127             (mm-destroy-parts handles)))))))
11128
11129 (defun gnus-summary-save-parts-1 (type dir handle reverse)
11130   (if (stringp (car handle))
11131       (mapcar (lambda (h) (gnus-summary-save-parts-1 type dir h reverse))
11132               (cdr handle))
11133     (when (if reverse
11134               (not (string-match type (mm-handle-media-type handle)))
11135             (string-match type (mm-handle-media-type handle)))
11136       (let ((file (expand-file-name
11137                    (gnus-map-function
11138                     mm-file-name-rewrite-functions
11139                     (file-name-nondirectory
11140                      (or
11141                       (mail-content-type-get
11142                        (mm-handle-disposition handle) 'filename)
11143                       (mail-content-type-get
11144                        (mm-handle-type handle) 'name)
11145                       (concat gnus-newsgroup-name
11146                               "." (number-to-string
11147                                    (cdr gnus-article-current))))))
11148                    dir)))
11149         (unless (file-exists-p file)
11150           (mm-save-part-to-file handle file))))))
11151
11152 ;; Summary extract commands
11153
11154 (defun gnus-summary-insert-pseudos (pslist &optional not-view)
11155   (let ((buffer-read-only nil)
11156         (article (gnus-summary-article-number))
11157         after-article b e)
11158     (unless (gnus-summary-goto-subject article)
11159       (error "No such article: %d" article))
11160     (gnus-summary-position-point)
11161     ;; If all commands are to be bunched up on one line, we collect
11162     ;; them here.
11163     (unless gnus-view-pseudos-separately
11164       (let ((ps (setq pslist (sort pslist 'gnus-pseudos<)))
11165             files action)
11166         (while ps
11167           (setq action (cdr (assq 'action (car ps))))
11168           (setq files (list (cdr (assq 'name (car ps)))))
11169           (while (and ps (cdr ps)
11170                       (string= (or action "1")
11171                                (or (cdr (assq 'action (cadr ps))) "2")))
11172             (push (cdr (assq 'name (cadr ps))) files)
11173             (setcdr ps (cddr ps)))
11174           (when files
11175             (when (not (string-match "%s" action))
11176               (push " " files))
11177             (push " " files)
11178             (when (assq 'execute (car ps))
11179               (setcdr (assq 'execute (car ps))
11180                       (funcall (if (string-match "%s" action)
11181                                    'format 'concat)
11182                                action
11183                                (mapconcat
11184                                 (lambda (f)
11185                                   (if (equal f " ")
11186                                       f
11187                                     (mm-quote-arg f)))
11188                                 files " ")))))
11189           (setq ps (cdr ps)))))
11190     (if (and gnus-view-pseudos (not not-view))
11191         (while pslist
11192           (when (assq 'execute (car pslist))
11193             (gnus-execute-command (cdr (assq 'execute (car pslist)))
11194                                   (eq gnus-view-pseudos 'not-confirm)))
11195           (setq pslist (cdr pslist)))
11196       (save-excursion
11197         (while pslist
11198           (setq after-article (or (cdr (assq 'article (car pslist)))
11199                                   (gnus-summary-article-number)))
11200           (gnus-summary-goto-subject after-article)
11201           (forward-line 1)
11202           (setq b (point))
11203           (insert "    " (file-name-nondirectory
11204                           (cdr (assq 'name (car pslist))))
11205                   ": " (or (cdr (assq 'execute (car pslist))) "") "\n")
11206           (setq e (point))
11207           (forward-line -1)             ; back to `b'
11208           (gnus-add-text-properties
11209            b (1- e) (list 'gnus-number gnus-reffed-article-number
11210                           gnus-mouse-face-prop gnus-mouse-face))
11211           (gnus-data-enter
11212            after-article gnus-reffed-article-number
11213            gnus-unread-mark b (car pslist) 0 (- e b))
11214           (setq gnus-newsgroup-unreads
11215                 (gnus-add-to-sorted-list gnus-newsgroup-unreads
11216                                          gnus-reffed-article-number))
11217           (setq gnus-reffed-article-number (1- gnus-reffed-article-number))
11218           (setq pslist (cdr pslist)))))))
11219
11220 (defun gnus-pseudos< (p1 p2)
11221   (let ((c1 (cdr (assq 'action p1)))
11222         (c2 (cdr (assq 'action p2))))
11223     (and c1 c2 (string< c1 c2))))
11224
11225 (defun gnus-request-pseudo-article (props)
11226   (cond ((assq 'execute props)
11227          (gnus-execute-command (cdr (assq 'execute props)))))
11228   (let ((gnus-current-article (gnus-summary-article-number)))
11229     (gnus-run-hooks 'gnus-mark-article-hook)))
11230
11231 (defun gnus-execute-command (command &optional automatic)
11232   (save-excursion
11233     (gnus-article-setup-buffer)
11234     (set-buffer gnus-article-buffer)
11235     (setq buffer-read-only nil)
11236     (let ((command (if automatic command
11237                      (read-string "Command: " (cons command 0)))))
11238       (erase-buffer)
11239       (insert "$ " command "\n\n")
11240       (if gnus-view-pseudo-asynchronously
11241           (start-process "gnus-execute" (current-buffer) shell-file-name
11242                          shell-command-switch command)
11243         (call-process shell-file-name nil t nil
11244                       shell-command-switch command)))))
11245
11246 ;; Summary kill commands.
11247
11248 (defun gnus-summary-edit-global-kill (article)
11249   "Edit the \"global\" kill file."
11250   (interactive (list (gnus-summary-article-number)))
11251   (gnus-group-edit-global-kill article))
11252
11253 (defun gnus-summary-edit-local-kill ()
11254   "Edit a local kill file applied to the current newsgroup."
11255   (interactive)
11256   (setq gnus-current-headers (gnus-summary-article-header))
11257   (gnus-group-edit-local-kill
11258    (gnus-summary-article-number) gnus-newsgroup-name))
11259
11260 ;;; Header reading.
11261
11262 (defun gnus-read-header (id &optional header)
11263   "Read the headers of article ID and enter them into the Gnus system."
11264   (let ((group gnus-newsgroup-name)
11265         (gnus-override-method
11266          (or
11267           gnus-override-method
11268           (and (gnus-news-group-p gnus-newsgroup-name)
11269                (car (gnus-refer-article-methods)))))
11270         where)
11271     ;; First we check to see whether the header in question is already
11272     ;; fetched.
11273     (if (stringp id)
11274         ;; This is a Message-ID.
11275         (setq header (or header (gnus-id-to-header id)))
11276       ;; This is an article number.
11277       (setq header (or header (gnus-summary-article-header id))))
11278     (if (and header
11279              (not (gnus-summary-article-sparse-p (mail-header-number header))))
11280         ;; We have found the header.
11281         header
11282       ;; We have to really fetch the header to this article.
11283       (save-excursion
11284         (set-buffer nntp-server-buffer)
11285         (when (setq where (gnus-request-head id group))
11286           (nnheader-fold-continuation-lines)
11287           (goto-char (point-max))
11288           (insert ".\n")
11289           (goto-char (point-min))
11290           (insert "211 ")
11291           (princ (cond
11292                   ((numberp id) id)
11293                   ((cdr where) (cdr where))
11294                   (header (mail-header-number header))
11295                   (t gnus-reffed-article-number))
11296                  (current-buffer))
11297           (insert " Article retrieved.\n"))
11298         (if (or (not where)
11299                 (not (setq header (car (gnus-get-newsgroup-headers nil t)))))
11300             ()                          ; Malformed head.
11301           (unless (gnus-summary-article-sparse-p (mail-header-number header))
11302             (when (and (stringp id)
11303                        (not (string= (gnus-group-real-name group)
11304                                      (car where))))
11305               ;; If we fetched by Message-ID and the article came
11306               ;; from a different group, we fudge some bogus article
11307               ;; numbers for this article.
11308               (mail-header-set-number header gnus-reffed-article-number))
11309             (save-excursion
11310               (set-buffer gnus-summary-buffer)
11311               (decf gnus-reffed-article-number)
11312               (gnus-remove-header (mail-header-number header))
11313               (push header gnus-newsgroup-headers)
11314               (setq gnus-current-headers header)
11315               (push (mail-header-number header) gnus-newsgroup-limit)))
11316           header)))))
11317
11318 (defun gnus-remove-header (number)
11319   "Remove header NUMBER from `gnus-newsgroup-headers'."
11320   (if (and gnus-newsgroup-headers
11321            (= number (mail-header-number (car gnus-newsgroup-headers))))
11322       (pop gnus-newsgroup-headers)
11323     (let ((headers gnus-newsgroup-headers))
11324       (while (and (cdr headers)
11325                   (not (= number (mail-header-number (cadr headers)))))
11326         (pop headers))
11327       (when (cdr headers)
11328         (setcdr headers (cddr headers))))))
11329
11330 ;;;
11331 ;;; summary highlights
11332 ;;;
11333
11334 (defun gnus-highlight-selected-summary ()
11335   "Highlight selected article in summary buffer."
11336   ;; Added by Per Abrahamsen <amanda@iesd.auc.dk>.
11337   (when gnus-summary-selected-face
11338     (save-excursion
11339       (let* ((beg (gnus-point-at-bol))
11340              (end (gnus-point-at-eol))
11341              ;; Fix by Mike Dugan <dugan@bucrf16.bu.edu>.
11342              (from (if (get-text-property beg gnus-mouse-face-prop)
11343                        beg
11344                      (or (next-single-property-change
11345                           beg gnus-mouse-face-prop nil end)
11346                          beg)))
11347              (to
11348               (if (= from end)
11349                   (- from 2)
11350                 (or (next-single-property-change
11351                      from gnus-mouse-face-prop nil end)
11352                     end))))
11353         ;; If no mouse-face prop on line we will have to = from = end,
11354         ;; so we highlight the entire line instead.
11355         (when (= (+ to 2) from)
11356           (setq from beg)
11357           (setq to end))
11358         (if gnus-newsgroup-selected-overlay
11359             ;; Move old overlay.
11360             (gnus-move-overlay
11361              gnus-newsgroup-selected-overlay from to (current-buffer))
11362           ;; Create new overlay.
11363           (gnus-overlay-put
11364            (setq gnus-newsgroup-selected-overlay (gnus-make-overlay from to))
11365            'face gnus-summary-selected-face))))))
11366
11367 (defvar gnus-summary-highlight-line-cached nil)
11368 (defvar gnus-summary-highlight-line-trigger nil)
11369
11370 (defun gnus-summary-highlight-line-0 ()
11371   (if (and (eq gnus-summary-highlight-line-trigger
11372                gnus-summary-highlight)
11373            gnus-summary-highlight-line-cached)
11374       gnus-summary-highlight-line-cached
11375     (setq gnus-summary-highlight-line-trigger gnus-summary-highlight
11376           gnus-summary-highlight-line-cached
11377           (let* ((cond (list 'cond))
11378                  (c cond)
11379                  (list gnus-summary-highlight))
11380             (while list
11381               (setcdr c (cons (list (caar list) (list 'quote (cdar list)))
11382                               nil))
11383               (setq c (cdr c)
11384                     list (cdr list)))
11385             (gnus-byte-compile (list 'lambda nil cond))))))
11386
11387 (defun gnus-summary-highlight-line ()
11388   "Highlight current line according to `gnus-summary-highlight'."
11389   (let* ((beg (gnus-point-at-bol))
11390          (article (or (gnus-summary-article-number) gnus-current-article))
11391          (score (or (cdr (assq article
11392                                gnus-newsgroup-scored))
11393                     gnus-summary-default-score 0))
11394          (mark (or (gnus-summary-article-mark) gnus-unread-mark))
11395          (inhibit-read-only t)
11396          (default gnus-summary-default-score)
11397          (default-high gnus-summary-default-high-score)
11398          (default-low gnus-summary-default-low-score)
11399          (uncached (and gnus-summary-use-undownloaded-faces
11400                         (memq article gnus-newsgroup-undownloaded)
11401                         (not (memq article gnus-newsgroup-cached)))))
11402     (let ((face (funcall (gnus-summary-highlight-line-0))))
11403       (unless (eq face (get-text-property beg 'face))
11404         (gnus-put-text-property-excluding-characters-with-faces
11405          beg (gnus-point-at-eol) 'face
11406          (setq face (if (boundp face) (symbol-value face) face)))
11407         (when gnus-summary-highlight-line-function
11408           (funcall gnus-summary-highlight-line-function article face))))))
11409
11410 (defun gnus-update-read-articles (group unread &optional compute)
11411   "Update the list of read articles in GROUP.
11412 UNREAD is a sorted list."
11413   (let* ((active (or gnus-newsgroup-active (gnus-active group)))
11414          (entry (gnus-gethash group gnus-newsrc-hashtb))
11415          (info (nth 2 entry))
11416          (prev 1)
11417          read)
11418     (if (or (not info) (not active))
11419         ;; There is no info on this group if it was, in fact,
11420         ;; killed.  Gnus stores no information on killed groups, so
11421         ;; there's nothing to be done.
11422         ;; One could store the information somewhere temporarily,
11423         ;; perhaps...  Hmmm...
11424         ()
11425       ;; Remove any negative articles numbers.
11426       (while (and unread (< (car unread) 0))
11427         (setq unread (cdr unread)))
11428       ;; Remove any expired article numbers
11429       (while (and unread (< (car unread) (car active)))
11430         (setq unread (cdr unread)))
11431       ;; Compute the ranges of read articles by looking at the list of
11432       ;; unread articles.
11433       (while unread
11434         (when (/= (car unread) prev)
11435           (push (if (= prev (1- (car unread))) prev
11436                   (cons prev (1- (car unread))))
11437                 read))
11438         (setq prev (1+ (car unread)))
11439         (setq unread (cdr unread)))
11440       (when (<= prev (cdr active))
11441         (push (cons prev (cdr active)) read))
11442       (setq read (if (> (length read) 1) (nreverse read) read))
11443       (if compute
11444           read
11445         (save-excursion
11446           (let (setmarkundo)
11447             ;; Propagate the read marks to the backend.
11448             (when (gnus-check-backend-function 'request-set-mark group)
11449               (let ((del (gnus-remove-from-range (gnus-info-read info) read))
11450                     (add (gnus-remove-from-range read (gnus-info-read info))))
11451                 (when (or add del)
11452                   (unless (gnus-check-group group)
11453                     (error "Can't open server for %s" group))
11454                   (gnus-request-set-mark
11455                    group (delq nil (list (if add (list add 'add '(read)))
11456                                          (if del (list del 'del '(read))))))
11457                   (setq setmarkundo
11458                         `(gnus-request-set-mark
11459                           ,group
11460                           ',(delq nil (list
11461                                        (if del (list del 'add '(read)))
11462                                        (if add (list add 'del '(read))))))))))
11463             (set-buffer gnus-group-buffer)
11464             (gnus-undo-register
11465               `(progn
11466                  (gnus-info-set-marks ',info ',(gnus-info-marks info) t)
11467                  (gnus-info-set-read ',info ',(gnus-info-read info))
11468                  (gnus-get-unread-articles-in-group ',info
11469                                                     (gnus-active ,group))
11470                  (gnus-group-update-group ,group t)
11471                  ,setmarkundo))))
11472         ;; Enter this list into the group info.
11473         (gnus-info-set-read info read)
11474         ;; Set the number of unread articles in gnus-newsrc-hashtb.
11475         (gnus-get-unread-articles-in-group info (gnus-active group))
11476         t))))
11477
11478 (defun gnus-offer-save-summaries ()
11479   "Offer to save all active summary buffers."
11480   (let (buffers)
11481     ;; Go through all buffers and find all summaries.
11482     (dolist (buffer (buffer-list))
11483       (when (and (setq buffer (buffer-name buffer))
11484                  (string-match "Summary" buffer)
11485                  (save-excursion
11486                    (set-buffer buffer)
11487                    ;; We check that this is, indeed, a summary buffer.
11488                    (and (eq major-mode 'gnus-summary-mode)
11489                         ;; Also make sure this isn't bogus.
11490                         gnus-newsgroup-prepared
11491                         ;; Also make sure that this isn't a
11492                         ;; dead summary buffer.
11493                         (not gnus-dead-summary-mode))))
11494         (push buffer buffers)))
11495     ;; Go through all these summary buffers and offer to save them.
11496     (when buffers
11497       (save-excursion
11498         (map-y-or-n-p
11499          "Update summary buffer %s? "
11500          (lambda (buf)
11501            (switch-to-buffer buf)
11502            (gnus-summary-exit))
11503          buffers)))))
11504
11505 (defun gnus-summary-setup-default-charset ()
11506   "Setup newsgroup default charset."
11507   (if (member gnus-newsgroup-name '("nndraft:delayed" "nndraft:drafts"))
11508       (setq gnus-newsgroup-charset nil)
11509     (let* ((ignored-charsets
11510             (or gnus-newsgroup-ephemeral-ignored-charsets
11511                 (append
11512                  (and gnus-newsgroup-name
11513                       (gnus-parameter-ignored-charsets gnus-newsgroup-name))
11514                  gnus-newsgroup-ignored-charsets))))
11515       (setq gnus-newsgroup-charset
11516             (or gnus-newsgroup-ephemeral-charset
11517                 (and gnus-newsgroup-name
11518                      (gnus-parameter-charset gnus-newsgroup-name))
11519                 gnus-default-charset))
11520       (set (make-local-variable 'gnus-newsgroup-ignored-charsets)
11521            ignored-charsets))))
11522
11523 ;;;
11524 ;;; Mime Commands
11525 ;;;
11526
11527 (defun gnus-summary-display-buttonized (&optional show-all-parts)
11528   "Display the current article buffer fully MIME-buttonized.
11529 If SHOW-ALL-PARTS (the prefix) is non-nil, all multipart/* parts are
11530 treated as multipart/mixed."
11531   (interactive "P")
11532   (require 'gnus-art)
11533   (let ((gnus-unbuttonized-mime-types nil)
11534         (gnus-mime-display-multipart-as-mixed show-all-parts))
11535     (gnus-summary-show-article)))
11536
11537 (defun gnus-summary-repair-multipart (article)
11538   "Add a Content-Type header to a multipart article without one."
11539   (interactive (list (gnus-summary-article-number)))
11540   (gnus-with-article article
11541     (message-narrow-to-head)
11542     (message-remove-header "Mime-Version")
11543     (goto-char (point-max))
11544     (insert "Mime-Version: 1.0\n")
11545     (widen)
11546     (when (search-forward "\n--" nil t)
11547       (let ((separator (buffer-substring (point) (gnus-point-at-eol))))
11548         (message-narrow-to-head)
11549         (message-remove-header "Content-Type")
11550         (goto-char (point-max))
11551         (insert (format "Content-Type: multipart/mixed; boundary=\"%s\"\n"
11552                         separator))
11553         (widen))))
11554   (let (gnus-mark-article-hook)
11555     (gnus-summary-select-article t t nil article)))
11556
11557 (defun gnus-summary-toggle-display-buttonized ()
11558   "Toggle the buttonizing of the article buffer."
11559   (interactive)
11560   (require 'gnus-art)
11561   (if (setq gnus-inhibit-mime-unbuttonizing
11562             (not gnus-inhibit-mime-unbuttonizing))
11563       (let ((gnus-unbuttonized-mime-types nil))
11564         (gnus-summary-show-article))
11565     (gnus-summary-show-article)))
11566
11567 ;;;
11568 ;;; Generic summary marking commands
11569 ;;;
11570
11571 (defvar gnus-summary-marking-alist
11572   '((read gnus-del-mark "d")
11573     (unread gnus-unread-mark "u")
11574     (ticked gnus-ticked-mark "!")
11575     (dormant gnus-dormant-mark "?")
11576     (expirable gnus-expirable-mark "e"))
11577   "An alist of names/marks/keystrokes.")
11578
11579 (defvar gnus-summary-generic-mark-map (make-sparse-keymap))
11580 (defvar gnus-summary-mark-map)
11581
11582 (defun gnus-summary-make-all-marking-commands ()
11583   (define-key gnus-summary-mark-map "M" gnus-summary-generic-mark-map)
11584   (dolist (elem gnus-summary-marking-alist)
11585     (apply 'gnus-summary-make-marking-command elem)))
11586
11587 (defun gnus-summary-make-marking-command (name mark keystroke)
11588   (let ((map (make-sparse-keymap)))
11589     (define-key gnus-summary-generic-mark-map keystroke map)
11590     (dolist (lway `((next "next" next nil "n")
11591                     (next-unread "next unread" next t "N")
11592                     (prev "previous" prev nil "p")
11593                     (prev-unread "previous unread" prev t "P")
11594                     (nomove "" nil nil ,keystroke)))
11595       (let ((func (gnus-summary-make-marking-command-1
11596                    mark (car lway) lway name)))
11597         (setq func (eval func))
11598         (define-key map (nth 4 lway) func)))))
11599
11600 (defun gnus-summary-make-marking-command-1 (mark way lway name)
11601   `(defun ,(intern
11602             (format "gnus-summary-put-mark-as-%s%s"
11603                     name (if (eq way 'nomove)
11604                              ""
11605                            (concat "-" (symbol-name way)))))
11606      (n)
11607      ,(format
11608        "Mark the current article as %s%s.
11609 If N, the prefix, then repeat N times.
11610 If N is negative, move in reverse order.
11611 The difference between N and the actual number of articles marked is
11612 returned."
11613        name (cadr lway))
11614      (interactive "p")
11615      (gnus-summary-generic-mark n ,mark ',(nth 2 lway) ,(nth 3 lway))))
11616
11617 (defun gnus-summary-generic-mark (n mark move unread)
11618   "Mark N articles with MARK."
11619   (unless (eq major-mode 'gnus-summary-mode)
11620     (error "This command can only be used in the summary buffer"))
11621   (gnus-summary-show-thread)
11622   (let ((nummove
11623          (cond
11624           ((eq move 'next) 1)
11625           ((eq move 'prev) -1)
11626           (t 0))))
11627     (if (zerop nummove)
11628         (setq n 1)
11629       (when (< n 0)
11630         (setq n (abs n)
11631               nummove (* -1 nummove))))
11632     (while (and (> n 0)
11633                 (gnus-summary-mark-article nil mark)
11634                 (zerop (gnus-summary-next-subject nummove unread t)))
11635       (setq n (1- n)))
11636     (when (/= 0 n)
11637       (gnus-message 7 "No more %sarticles" (if mark "" "unread ")))
11638     (gnus-summary-recenter)
11639     (gnus-summary-position-point)
11640     (gnus-set-mode-line 'summary)
11641     n))
11642
11643 (defun gnus-summary-insert-articles (articles)
11644   (when (setq articles
11645               (gnus-sorted-difference articles
11646                                       (mapcar (lambda (h)
11647                                                 (mail-header-number h))
11648                                               gnus-newsgroup-headers)))
11649     (setq gnus-newsgroup-headers
11650           (gnus-merge 'list
11651                       gnus-newsgroup-headers
11652                       (gnus-fetch-headers articles)
11653                       'gnus-article-sort-by-number))
11654     ;; Suppress duplicates?
11655     (when gnus-suppress-duplicates
11656       (gnus-dup-suppress-articles))
11657
11658     ;; We might want to build some more threads first.
11659     (when (and gnus-fetch-old-headers
11660                (eq gnus-headers-retrieved-by 'nov))
11661       (if (eq gnus-fetch-old-headers 'invisible)
11662           (gnus-build-all-threads)
11663         (gnus-build-old-threads)))
11664     ;; Let the Gnus agent mark articles as read.
11665     (when gnus-agent
11666       (gnus-agent-get-undownloaded-list))
11667     ;; Remove list identifiers from subject
11668     (when gnus-list-identifiers
11669       (gnus-summary-remove-list-identifiers))
11670     ;; First and last article in this newsgroup.
11671     (when gnus-newsgroup-headers
11672       (setq gnus-newsgroup-begin
11673             (mail-header-number (car gnus-newsgroup-headers))
11674             gnus-newsgroup-end
11675             (mail-header-number
11676              (gnus-last-element gnus-newsgroup-headers))))
11677     (when gnus-use-scoring
11678       (gnus-possibly-score-headers))))
11679
11680 (defun gnus-summary-insert-old-articles (&optional all)
11681   "Insert all old articles in this group.
11682 If ALL is non-nil, already read articles become readable.
11683 If ALL is a number, fetch this number of articles."
11684   (interactive "P")
11685   (prog1
11686       (let ((old (sort (mapcar 'car gnus-newsgroup-data) '<))
11687             older len)
11688         (setq older
11689               ;; Some nntp servers lie about their active range.  When
11690               ;; this happens, the active range can be in the millions.
11691               ;; Use a compressed range to avoid creating a huge list.
11692               (gnus-range-difference (list gnus-newsgroup-active) old))
11693         (setq len (gnus-range-length older))
11694         (cond
11695          ((null older) nil)
11696          ((numberp all)
11697           (if (< all len)
11698               (let ((older-range (nreverse older)))
11699                 (setq older nil)
11700
11701                 (while (> all 0)
11702                   (let* ((r (pop older-range))
11703                          (min (if (numberp r) r (car r)))
11704                          (max (if (numberp r) r (cdr r))))
11705                     (while (and (<= min max)
11706                                 (> all 0))
11707                       (push max older)
11708                       (setq all (1- all)
11709                             max (1- max))))))
11710             (setq older (gnus-uncompress-range older))))
11711          (all
11712           (setq older (gnus-uncompress-range older)))
11713          (t
11714           (when (and (numberp gnus-large-newsgroup)
11715                    (> len gnus-large-newsgroup))
11716               (let* ((cursor-in-echo-area nil)
11717                      (initial (gnus-parameter-large-newsgroup-initial
11718                                gnus-newsgroup-name))
11719                      (input
11720                       (read-string
11721                        (format
11722                         "How many articles from %s (%s %d): "
11723                         (gnus-limit-string
11724                          (gnus-group-decoded-name gnus-newsgroup-name) 35)
11725                         (if initial "max" "default")
11726                         len)
11727                        (if initial
11728                            (cons (number-to-string initial)
11729                                  0)))))
11730                 (unless (string-match "^[ \t]*$" input)
11731                   (setq all (string-to-number input))
11732                   (if (< all len)
11733                       (let ((older-range (nreverse older)))
11734                         (setq older nil)
11735
11736                         (while (> all 0)
11737                           (let* ((r (pop older-range))
11738                                  (min (if (numberp r) r (car r)))
11739                                  (max (if (numberp r) r (cdr r))))
11740                             (while (and (<= min max)
11741                                         (> all 0))
11742                               (push max older)
11743                               (setq all (1- all)
11744                                     max (1- max))))))))))
11745           (setq older (gnus-uncompress-range older))))
11746         (if (not older)
11747             (message "No old news.")
11748           (gnus-summary-insert-articles older)
11749           (gnus-summary-limit (gnus-sorted-nunion old older))))
11750     (gnus-summary-position-point)))
11751
11752 (defun gnus-summary-insert-new-articles ()
11753   "Insert all new articles in this group."
11754   (interactive)
11755   (prog1
11756       (let ((old (sort (mapcar 'car gnus-newsgroup-data) '<))
11757             (old-active gnus-newsgroup-active)
11758             (nnmail-fetched-sources (list t))
11759             i new)
11760         (setq gnus-newsgroup-active
11761               (gnus-activate-group gnus-newsgroup-name 'scan))
11762         (setq i (cdr gnus-newsgroup-active))
11763         (while (> i (cdr old-active))
11764           (push i new)
11765           (decf i))
11766         (if (not new)
11767             (message "No gnus is bad news.")
11768           (gnus-summary-insert-articles new)
11769           (setq gnus-newsgroup-unreads
11770                 (gnus-sorted-nunion gnus-newsgroup-unreads new))
11771           (gnus-summary-limit (gnus-sorted-nunion old new))))
11772     (gnus-summary-position-point)))
11773
11774 (gnus-summary-make-all-marking-commands)
11775
11776 (gnus-ems-redefine)
11777
11778 (provide 'gnus-sum)
11779
11780 (run-hooks 'gnus-sum-load-hook)
11781
11782 ;; Local Variables:
11783 ;; coding: iso-8859-1
11784 ;; End:
11785
11786 ;; arch-tag: 17c6748f-6d00-4d36-bf01-835c42f31235
11787 ;;; gnus-sum.el ends here