lisp/gnus/gnus-sum.el

   1 ;;; gnus-sum.el --- summary mode commands for Gnus
   2
   3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007 Free Software Foundation, Inc.
   5
   6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   7 ;; Keywords: news
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Commentary:
  27
  28 ;;; Code:
  29
  30 (eval-when-compile
  31   (require 'cl)
  32   (defvar tool-bar-mode))
  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 'gmm-utils)
  42 (require 'mm-decode)
  43 (require 'nnoo)
  44
  45 (autoload 'gnus-summary-limit-include-cached "gnus-cache" nil t)
  46 (autoload 'gnus-cache-write-active "gnus-cache")
  47 (autoload 'gnus-mailing-list-insinuate "gnus-ml" nil t)
  48 (autoload 'turn-on-gnus-mailing-list-mode "gnus-ml" nil t)
  49 (autoload 'gnus-pick-line-number "gnus-salt" nil t)
  50 (autoload 'mm-uu-dissect "mm-uu")
  51 (autoload 'gnus-article-outlook-deuglify-article "deuglify"
  52   "Deuglify broken Outlook (Express) articles and redisplay."
  53   t)
  54 (autoload 'gnus-article-outlook-unwrap-lines "deuglify" nil t)
  55 (autoload 'gnus-article-outlook-repair-attribution "deuglify" nil t)
  56 (autoload 'gnus-article-outlook-rearrange-citation "deuglify" nil t)
  57
  58 (defcustom gnus-kill-summary-on-exit t
  59   "*If non-nil, kill the summary buffer when you exit from it.
  60 If nil, the summary will become a \"*Dead Summary*\" buffer, and
  61 it will be killed sometime later."
  62   :group 'gnus-summary-exit
  63   :type 'boolean)
  64
  65 (defcustom gnus-fetch-old-headers nil
  66   "*Non-nil means that Gnus will try to build threads by grabbing old headers.
  67 If an unread article in the group refers to an older, already read (or
  68 just marked as read) article, the old article will not normally be
  69 displayed in the Summary buffer.  If this variable is t, Gnus
  70 will attempt to grab the headers to the old articles, and thereby
  71 build complete threads.  If it has the value `some', only enough
  72 headers to connect otherwise loose threads will be displayed.  This
  73 variable can also be a number.  In that case, no more than that number
  74 of old headers will be fetched.  If it has the value `invisible', all
  75 old headers will be fetched, but none will be displayed.
  76
  77 The server has to support NOV for any of this to work."
  78   :group 'gnus-thread
  79   :type '(choice (const :tag "off" nil)
  80                  (const :tag "on" t)
  81                  (const some)
  82                  (const invisible)
  83                  number
  84                  (sexp :menu-tag "other" t)))
  85
  86 (defcustom gnus-refer-thread-limit 200
  87   "*The number of old headers to fetch when doing \\<gnus-summary-mode-map>\\[gnus-summary-refer-thread].
  88 If t, fetch all the available old headers."
  89   :group 'gnus-thread
  90   :type '(choice number
  91                  (sexp :menu-tag "other" t)))
  92
  93 (defcustom gnus-summary-make-false-root 'adopt
  94   "*nil means that Gnus won't gather loose threads.
  95 If the root of a thread has expired or been read in a previous
  96 session, the information necessary to build a complete thread has been
  97 lost.  Instead of having many small sub-threads from this original thread
  98 scattered all over the summary buffer, Gnus can gather them.
  99
 100 If non-nil, Gnus will try to gather all loose sub-threads from an
 101 original thread into one large thread.
 102
 103 If this variable is non-nil, it should be one of `none', `adopt',
 104 `dummy' or `empty'.
 105
 106 If this variable is `none', Gnus will not make a false root, but just
 107 present the sub-threads after another.
 108 If this variable is `dummy', Gnus will create a dummy root that will
 109 have all the sub-threads as children.
 110 If this variable is `adopt', Gnus will make one of the \"children\"
 111 the parent and mark all the step-children as such.
 112 If this variable is `empty', the \"children\" are printed with empty
 113 subject fields.  (Or rather, they will be printed with a string
 114 given by the `gnus-summary-same-subject' variable.)"
 115   :group 'gnus-thread
 116   :type '(choice (const :tag "off" nil)
 117                  (const none)
 118                  (const dummy)
 119                  (const adopt)
 120                  (const empty)))
 121
 122 (defcustom gnus-summary-make-false-root-always nil
 123   "Always make a false dummy root."
 124   :version "22.1"
 125   :group 'gnus-thread
 126   :type 'boolean)
 127
 128 (defcustom gnus-summary-gather-exclude-subject "^ *$\\|^(none)$"
 129   "*A regexp to match subjects to be excluded from loose thread gathering.
 130 As loose thread gathering is done on subjects only, that means that
 131 there can be many false gatherings performed.  By rooting out certain
 132 common subjects, gathering might become saner."
 133   :group 'gnus-thread
 134   :type 'regexp)
 135
 136 (defcustom gnus-summary-gather-subject-limit nil
 137   "*Maximum length of subject comparisons when gathering loose threads.
 138 Use nil to compare full subjects.  Setting this variable to a low
 139 number will help gather threads that have been corrupted by
 140 newsreaders chopping off subject lines, but it might also mean that
 141 unrelated articles that have subject that happen to begin with the
 142 same few characters will be incorrectly gathered.
 143
 144 If this variable is `fuzzy', Gnus will use a fuzzy algorithm when
 145 comparing subjects."
 146   :group 'gnus-thread
 147   :type '(choice (const :tag "off" nil)
 148                  (const fuzzy)
 149                  (sexp :menu-tag "on" t)))
 150
 151 (defcustom gnus-simplify-subject-functions nil
 152   "List of functions taking a string argument that simplify subjects.
 153 The functions are applied recursively.
 154
 155 Useful functions to put in this list include:
 156 `gnus-simplify-subject-re', `gnus-simplify-subject-fuzzy',
 157 `gnus-simplify-whitespace', and `gnus-simplify-all-whitespace'."
 158   :group 'gnus-thread
 159   :type '(repeat function))
 160
 161 (defcustom gnus-simplify-ignored-prefixes nil
 162   "*Remove matches for this regexp from subject lines when simplifying fuzzily."
 163   :group 'gnus-thread
 164   :type '(choice (const :tag "off" nil)
 165                  regexp))
 166
 167 (defcustom gnus-build-sparse-threads nil
 168   "*If non-nil, fill in the gaps in threads.
 169 If `some', only fill in the gaps that are needed to tie loose threads
 170 together.  If `more', fill in all leaf nodes that Gnus can find.  If
 171 non-nil and non-`some', fill in all gaps that Gnus manages to guess."
 172   :group 'gnus-thread
 173   :type '(choice (const :tag "off" nil)
 174                  (const some)
 175                  (const more)
 176                  (sexp :menu-tag "all" t)))
 177
 178 (defcustom gnus-summary-thread-gathering-function
 179   'gnus-gather-threads-by-subject
 180   "*Function used for gathering loose threads.
 181 There are two pre-defined functions: `gnus-gather-threads-by-subject',
 182 which only takes Subjects into consideration; and
 183 `gnus-gather-threads-by-references', which compared the References
 184 headers of the articles to find matches."
 185   :group 'gnus-thread
 186   :type '(radio (function-item gnus-gather-threads-by-subject)
 187                 (function-item gnus-gather-threads-by-references)
 188                 (function :tag "other")))
 189
 190 (defcustom gnus-summary-same-subject ""
 191   "*String indicating that the current article has the same subject as the previous.
 192 This variable will only be used if the value of
 193 `gnus-summary-make-false-root' is `empty'."
 194   :group 'gnus-summary-format
 195   :type 'string)
 196
 197 (defcustom gnus-summary-goto-unread t
 198   "*If t, many commands will go to the next unread article.
 199 This applies to marking commands as well as other commands that
 200 \"naturally\" select the next article, like, for instance, `SPC' at
 201 the end of an article.
 202
 203 If nil, the marking commands do NOT go to the next unread article
 204 \(they go to the next article instead).  If `never', commands that
 205 usually go to the next unread article, will go to the next article,
 206 whether it is read or not."
 207   :group 'gnus-summary-marks
 208   :link '(custom-manual "(gnus)Setting Marks")
 209   :type '(choice (const :tag "off" nil)
 210                  (const never)
 211                  (sexp :menu-tag "on" t)))
 212
 213 (defcustom gnus-summary-default-score 0
 214   "*Default article score level.
 215 All scores generated by the score files will be added to this score.
 216 If this variable is nil, scoring will be disabled."
 217   :group 'gnus-score-default
 218   :type '(choice (const :tag "disable")
 219                  integer))
 220
 221 (defcustom gnus-summary-default-high-score 0
 222   "*Default threshold for a high scored article.
 223 An article will be highlighted as high scored if its score is greater
 224 than this score."
 225   :version "22.1"
 226   :group 'gnus-score-default
 227   :type 'integer)
 228
 229 (defcustom gnus-summary-default-low-score 0
 230   "*Default threshold for a low scored article.
 231 An article will be highlighted as low scored if its score is smaller
 232 than this score."
 233   :version "22.1"
 234   :group 'gnus-score-default
 235   :type 'integer)
 236
 237 (defcustom gnus-summary-zcore-fuzz 0
 238   "*Fuzziness factor for the zcore in the summary buffer.
 239 Articles with scores closer than this to `gnus-summary-default-score'
 240 will not be marked."
 241   :group 'gnus-summary-format
 242   :type 'integer)
 243
 244 (defcustom gnus-simplify-subject-fuzzy-regexp nil
 245   "*Strings to be removed when doing fuzzy matches.
 246 This can either be a regular expression or list of regular expressions
 247 that will be removed from subject strings if fuzzy subject
 248 simplification is selected."
 249   :group 'gnus-thread
 250   :type '(repeat regexp))
 251
 252 (defcustom gnus-show-threads t
 253   "*If non-nil, display threads in summary mode."
 254   :group 'gnus-thread
 255   :type 'boolean)
 256
 257 (defcustom gnus-thread-hide-subtree nil
 258   "*If non-nil, hide all threads initially.
 259 This can be a predicate specifier which says which threads to hide.
 260 If threads are hidden, you have to run the command
 261 `gnus-summary-show-thread' by hand or select an article."
 262   :group 'gnus-thread
 263   :type '(radio (sexp :format "Non-nil\n"
 264                       :match (lambda (widget value)
 265                                (not (or (consp value) (functionp value))))
 266                       :value t)
 267                 (const nil)
 268                 (sexp :tag "Predicate specifier")))
 269
 270 (defcustom gnus-thread-hide-killed t
 271   "*If non-nil, hide killed threads automatically."
 272   :group 'gnus-thread
 273   :type 'boolean)
 274
 275 (defcustom gnus-thread-ignore-subject t
 276   "*If non-nil, which is the default, ignore subjects and do all threading based on the Reference header.
 277 If nil, articles that have different subjects from their parents will
 278 start separate threads."
 279   :group 'gnus-thread
 280   :type 'boolean)
 281
 282 (defcustom gnus-thread-operation-ignore-subject t
 283   "*If non-nil, subjects will be ignored when doing thread commands.
 284 This affects commands like `gnus-summary-kill-thread' and
 285 `gnus-summary-lower-thread'.
 286
 287 If this variable is nil, articles in the same thread with different
 288 subjects will not be included in the operation in question.  If this
 289 variable is `fuzzy', only articles that have subjects that are fuzzily
 290 equal will be included."
 291   :group 'gnus-thread
 292   :type '(choice (const :tag "off" nil)
 293                  (const fuzzy)
 294                  (sexp :tag "on" t)))
 295
 296 (defcustom gnus-thread-indent-level 4
 297   "*Number that says how much each sub-thread should be indented."
 298   :group 'gnus-thread
 299   :type 'integer)
 300
 301 (defcustom gnus-auto-extend-newsgroup t
 302   "*If non-nil, extend newsgroup forward and backward when requested."
 303   :group 'gnus-summary-choose
 304   :type 'boolean)
 305
 306 (defcustom gnus-auto-select-first t
 307   "If non-nil, select an article on group entry.
 308 An article is selected automatically when entering a group
 309 e.g. with \\<gnus-group-mode-map>\\[gnus-group-read-group], or via `gnus-summary-next-page' or
 310 `gnus-summary-catchup-and-goto-next-group'.
 311
 312 Which article is selected is controlled by the variable
 313 `gnus-auto-select-subject'.
 314
 315 If you want to prevent automatic selection of articles in some
 316 newsgroups, set the variable to nil in `gnus-select-group-hook'."
 317   ;; Commands include...
 318   ;; \\<gnus-group-mode-map>\\[gnus-group-read-group]
 319   ;; \\<gnus-summary-mode-map>\\[gnus-summary-next-page]
 320   ;; \\<gnus-summary-mode-map>\\[gnus-summary-catchup-and-goto-next-group]
 321   :group 'gnus-group-select
 322   :type '(choice (const :tag "none" nil)
 323                  (sexp :menu-tag "first" t)))
 324
 325 (defcustom gnus-auto-select-subject 'unread
 326   "*Says what subject to place under point when entering a group.
 327
 328 This variable can either be the symbols `first' (place point on the
 329 first subject), `unread' (place point on the subject line of the first
 330 unread article), `best' (place point on the subject line of the
 331 higest-scored article), `unseen' (place point on the subject line of
 332 the first unseen article), `unseen-or-unread' (place point on the subject
 333 line of the first unseen article or, if all article have been seen, on the
 334 subject line of the first unread article), or a function to be called to
 335 place point on some subject line."
 336   :version "22.1"
 337   :group 'gnus-group-select
 338   :type '(choice (const best)
 339                  (const unread)
 340                  (const first)
 341                  (const unseen)
 342                  (const unseen-or-unread)))
 343
 344 (defcustom gnus-auto-select-next t
 345   "*If non-nil, offer to go to the next group from the end of the previous.
 346 If the value is t and the next newsgroup is empty, Gnus will exit
 347 summary mode and go back to group mode.  If the value is neither nil
 348 nor t, Gnus will select the following unread newsgroup.  In
 349 particular, if the value is the symbol `quietly', the next unread
 350 newsgroup will be selected without any confirmation, and if it is
 351 `almost-quietly', the next group will be selected without any
 352 confirmation if you are located on the last article in the group.
 353 Finally, if this variable is `slightly-quietly', the `\\<gnus-summary-mode-map>\\[gnus-summary-catchup-and-goto-next-group]' command
 354 will go to the next group without confirmation."
 355   :group 'gnus-summary-maneuvering
 356   :type '(choice (const :tag "off" nil)
 357                  (const quietly)
 358                  (const almost-quietly)
 359                  (const slightly-quietly)
 360                  (sexp :menu-tag "on" t)))
 361
 362 (defcustom gnus-auto-select-same nil
 363   "*If non-nil, select the next article with the same subject.
 364 If there are no more articles with the same subject, go to
 365 the first unread article."
 366   :group 'gnus-summary-maneuvering
 367   :type 'boolean)
 368
 369 (defcustom gnus-auto-goto-ignores 'unfetched
 370   "*Says how to handle unfetched articles when maneuvering.
 371
 372 This variable can either be the symbols nil (maneuver to any
 373 article), `undownloaded' (maneuvering while unplugged ignores articles
 374 that have not been fetched), `always-undownloaded' (maneuvering always
 375 ignores articles that have not been fetched), `unfetched' (maneuvering
 376 ignores articles whose headers have not been fetched).
 377
 378 NOTE: The list of unfetched articles will always be nil when plugged
 379 and, when unplugged, a subset of the undownloaded article list."
 380   :version "22.1"
 381   :group 'gnus-summary-maneuvering
 382   :type '(choice (const :tag "None" nil)
 383                  (const :tag "Undownloaded when unplugged" undownloaded)
 384                  (const :tag "Undownloaded" always-undownloaded)
 385                  (const :tag "Unfetched" unfetched)))
 386
 387 (defcustom gnus-summary-check-current nil
 388   "*If non-nil, consider the current article when moving.
 389 The \"unread\" movement commands will stay on the same line if the
 390 current article is unread."
 391   :group 'gnus-summary-maneuvering
 392   :type 'boolean)
 393
 394 (defcustom gnus-auto-center-summary t
 395   "*If non-nil, always center the current summary buffer.
 396 In particular, if `vertical' do only vertical recentering.  If non-nil
 397 and non-`vertical', do both horizontal and vertical recentering."
 398   :group 'gnus-summary-maneuvering
 399   :type '(choice (const :tag "none" nil)
 400                  (const vertical)
 401                  (integer :tag "height")
 402                  (sexp :menu-tag "both" t)))
 403
 404 (defvar gnus-auto-center-group t
 405   "*If non-nil, always center the group buffer.")
 406
 407 (defcustom gnus-show-all-headers nil
 408   "*If non-nil, don't hide any headers."
 409   :group 'gnus-article-hiding
 410   :group 'gnus-article-headers
 411   :type 'boolean)
 412
 413 (defcustom gnus-summary-ignore-duplicates nil
 414   "*If non-nil, ignore articles with identical Message-ID headers."
 415   :group 'gnus-summary
 416   :type 'boolean)
 417
 418 (defcustom gnus-single-article-buffer t
 419   "*If non-nil, display all articles in the same buffer.
 420 If nil, each group will get its own article buffer."
 421   :group 'gnus-article-various
 422   :type 'boolean)
 423
 424 (defcustom gnus-break-pages t
 425   "*If non-nil, do page breaking on articles.
 426 The page delimiter is specified by the `gnus-page-delimiter'
 427 variable."
 428   :group 'gnus-article-various
 429   :type 'boolean)
 430
 431 (defcustom gnus-move-split-methods nil
 432   "*Variable used to suggest where articles are to be moved to.
 433 It uses the same syntax as the `gnus-split-methods' variable.
 434 However, whereas `gnus-split-methods' specifies file names as targets,
 435 this variable specifies group names."
 436   :group 'gnus-summary-mail
 437   :type '(repeat (choice (list :value (fun) function)
 438                          (cons :value ("" "") regexp (repeat string))
 439                          (sexp :value nil))))
 440
 441 ;; FIXME: Although the custom type is `character' for the following variables,
 442 ;; using multibyte characters (Latin-1, UTF-8) doesn't work.  -- rs
 443
 444 (defcustom gnus-unread-mark ?           ;Whitespace
 445   "*Mark used for unread articles."
 446   :group 'gnus-summary-marks
 447   :type 'character)
 448
 449 (defcustom gnus-ticked-mark ?!
 450   "*Mark used for ticked articles."
 451   :group 'gnus-summary-marks
 452   :type 'character)
 453
 454 (defcustom gnus-dormant-mark ??
 455   "*Mark used for dormant articles."
 456   :group 'gnus-summary-marks
 457   :type 'character)
 458
 459 (defcustom gnus-del-mark ?r
 460   "*Mark used for del'd articles."
 461   :group 'gnus-summary-marks
 462   :type 'character)
 463
 464 (defcustom gnus-read-mark ?R
 465   "*Mark used for read articles."
 466   :group 'gnus-summary-marks
 467   :type 'character)
 468
 469 (defcustom gnus-expirable-mark ?E
 470   "*Mark used for expirable articles."
 471   :group 'gnus-summary-marks
 472   :type 'character)
 473
 474 (defcustom gnus-killed-mark ?K
 475   "*Mark used for killed articles."
 476   :group 'gnus-summary-marks
 477   :type 'character)
 478
 479 (defcustom gnus-spam-mark ?$
 480   "*Mark used for spam articles."
 481   :version "22.1"
 482   :group 'gnus-summary-marks
 483   :type 'character)
 484
 485 (defcustom gnus-souped-mark ?F
 486   "*Mark used for souped articles."
 487   :group 'gnus-summary-marks
 488   :type 'character)
 489
 490 (defcustom gnus-kill-file-mark ?X
 491   "*Mark used for articles killed by kill files."
 492   :group 'gnus-summary-marks
 493   :type 'character)
 494
 495 (defcustom gnus-low-score-mark ?Y
 496   "*Mark used for articles with a low score."
 497   :group 'gnus-summary-marks
 498   :type 'character)
 499
 500 (defcustom gnus-catchup-mark ?C
 501   "*Mark used for articles that are caught up."
 502   :group 'gnus-summary-marks
 503   :type 'character)
 504
 505 (defcustom gnus-replied-mark ?A
 506   "*Mark used for articles that have been replied to."
 507   :group 'gnus-summary-marks
 508   :type 'character)
 509
 510 (defcustom gnus-forwarded-mark ?F
 511   "*Mark used for articles that have been forwarded."
 512   :version "22.1"
 513   :group 'gnus-summary-marks
 514   :type 'character)
 515
 516 (defcustom gnus-recent-mark ?N
 517   "*Mark used for articles that are recent."
 518   :version "22.1"
 519   :group 'gnus-summary-marks
 520   :type 'character)
 521
 522 (defcustom gnus-cached-mark ?*
 523   "*Mark used for articles that are in the cache."
 524   :group 'gnus-summary-marks
 525   :type 'character)
 526
 527 (defcustom gnus-saved-mark ?S
 528   "*Mark used for articles that have been saved."
 529   :group 'gnus-summary-marks
 530   :type 'character)
 531
 532 (defcustom gnus-unseen-mark ?.
 533   "*Mark used for articles that haven't been seen."
 534   :version "22.1"
 535   :group 'gnus-summary-marks
 536   :type 'character)
 537
 538 (defcustom gnus-no-mark ?               ;Whitespace
 539   "*Mark used for articles that have no other secondary mark."
 540   :version "22.1"
 541   :group 'gnus-summary-marks
 542   :type 'character)
 543
 544 (defcustom gnus-ancient-mark ?O
 545   "*Mark used for ancient articles."
 546   :group 'gnus-summary-marks
 547   :type 'character)
 548
 549 (defcustom gnus-sparse-mark ?Q
 550   "*Mark used for sparsely reffed articles."
 551   :group 'gnus-summary-marks
 552   :type 'character)
 553
 554 (defcustom gnus-canceled-mark ?G
 555   "*Mark used for canceled articles."
 556   :group 'gnus-summary-marks
 557   :type 'character)
 558
 559 (defcustom gnus-duplicate-mark ?M
 560   "*Mark used for duplicate articles."
 561   :group 'gnus-summary-marks
 562   :type 'character)
 563
 564 (defcustom gnus-undownloaded-mark ?-
 565   "*Mark used for articles that weren't downloaded."
 566   :version "22.1"
 567   :group 'gnus-summary-marks
 568   :type 'character)
 569
 570 (defcustom gnus-downloaded-mark ?+
 571   "*Mark used for articles that were downloaded."
 572   :group 'gnus-summary-marks
 573   :type 'character)
 574
 575 (defcustom gnus-downloadable-mark ?%
 576   "*Mark used for articles that are to be downloaded."
 577   :group 'gnus-summary-marks
 578   :type 'character)
 579
 580 (defcustom gnus-unsendable-mark ?=
 581   "*Mark used for articles that won't be sent."
 582   :group 'gnus-summary-marks
 583   :type 'character)
 584
 585 (defcustom gnus-score-over-mark ?+
 586   "*Score mark used for articles with high scores."
 587   :group 'gnus-summary-marks
 588   :type 'character)
 589
 590 (defcustom gnus-score-below-mark ?-
 591   "*Score mark used for articles with low scores."
 592   :group 'gnus-summary-marks
 593   :type 'character)
 594
 595 (defcustom gnus-empty-thread-mark ?     ;Whitespace
 596   "*There is no thread under the article."
 597   :group 'gnus-summary-marks
 598   :type 'character)
 599
 600 (defcustom gnus-not-empty-thread-mark ?=
 601   "*There is a thread under the article."
 602   :group 'gnus-summary-marks
 603   :type 'character)
 604
 605 (defcustom gnus-view-pseudo-asynchronously nil
 606   "*If non-nil, Gnus will view pseudo-articles asynchronously."
 607   :group 'gnus-extract-view
 608   :type 'boolean)
 609
 610 (defcustom gnus-auto-expirable-marks
 611   (list gnus-killed-mark gnus-del-mark gnus-catchup-mark
 612         gnus-low-score-mark gnus-ancient-mark gnus-read-mark
 613         gnus-souped-mark gnus-duplicate-mark)
 614   "*The list of marks converted into expiration if a group is auto-expirable."
 615   :version "21.1"
 616   :group 'gnus-summary
 617   :type '(repeat character))
 618
 619 (defcustom gnus-inhibit-user-auto-expire t
 620   "*If non-nil, user marking commands will not mark an article as expirable, even if the group has auto-expire turned on."
 621   :version "21.1"
 622   :group 'gnus-summary
 623   :type 'boolean)
 624
 625 (defcustom gnus-view-pseudos nil
 626   "*If `automatic', pseudo-articles will be viewed automatically.
 627 If `not-confirm', pseudos will be viewed automatically, and the user
 628 will not be asked to confirm the command."
 629   :group 'gnus-extract-view
 630   :type '(choice (const :tag "off" nil)
 631                  (const automatic)
 632                  (const not-confirm)))
 633
 634 (defcustom gnus-view-pseudos-separately t
 635   "*If non-nil, one pseudo-article will be created for each file to be viewed.
 636 If nil, all files that use the same viewing command will be given as a
 637 list of parameters to that command."
 638   :group 'gnus-extract-view
 639   :type 'boolean)
 640
 641 (defcustom gnus-insert-pseudo-articles t
 642   "*If non-nil, insert pseudo-articles when decoding articles."
 643   :group 'gnus-extract-view
 644   :type 'boolean)
 645
 646 (defcustom gnus-summary-dummy-line-format
 647   "   %(:                             :%) %S\n"
 648   "*The format specification for the dummy roots in the summary buffer.
 649 It works along the same lines as a normal formatting string,
 650 with some simple extensions.
 651
 652 %S  The subject
 653
 654 General format specifiers can also be used.
 655 See `(gnus)Formatting Variables'."
 656   :link '(custom-manual "(gnus)Formatting Variables")
 657   :group 'gnus-threading
 658   :type 'string)
 659
 660 (defcustom gnus-summary-mode-line-format "Gnus: %g [%A] %Z"
 661   "*The format specification for the summary mode line.
 662 It works along the same lines as a normal formatting string,
 663 with some simple extensions:
 664
 665 %G  Group name
 666 %p  Unprefixed group name
 667 %A  Current article number
 668 %z  Current article score
 669 %V  Gnus version
 670 %U  Number of unread articles in the group
 671 %e  Number of unselected articles in the group
 672 %Z  A string with unread/unselected article counts
 673 %g  Shortish group name
 674 %S  Subject of the current article
 675 %u  User-defined spec
 676 %s  Current score file name
 677 %d  Number of dormant articles
 678 %r  Number of articles that have been marked as read in this session
 679 %E  Number of articles expunged by the score files"
 680   :group 'gnus-summary-format
 681   :type 'string)
 682
 683 (defcustom gnus-list-identifiers nil
 684   "Regexp that matches list identifiers to be removed from subject.
 685 This can also be a list of regexps."
 686   :version "21.1"
 687   :group 'gnus-summary-format
 688   :group 'gnus-article-hiding
 689   :type '(choice (const :tag "none" nil)
 690                  (regexp :value ".*")
 691                  (repeat :value (".*") regexp)))
 692
 693 (defcustom gnus-summary-mark-below 0
 694   "*Mark all articles with a score below this variable as read.
 695 This variable is local to each summary buffer and usually set by the
 696 score file."
 697   :group 'gnus-score-default
 698   :type 'integer)
 699
 700 (defcustom gnus-article-sort-functions '(gnus-article-sort-by-number)
 701   "*List of functions used for sorting articles in the summary buffer.
 702
 703 Each function takes two articles and returns non-nil if the first
 704 article should be sorted before the other.  If you use more than one
 705 function, the primary sort function should be the last.  You should
 706 probably always include `gnus-article-sort-by-number' in the list of
 707 sorting functions -- preferably first.  Also note that sorting by date
 708 is often much slower than sorting by number, and the sorting order is
 709 very similar.  (Sorting by date means sorting by the time the message
 710 was sent, sorting by number means sorting by arrival time.)
 711
 712 Ready-made functions include `gnus-article-sort-by-number',
 713 `gnus-article-sort-by-author', `gnus-article-sort-by-subject',
 714 `gnus-article-sort-by-date', `gnus-article-sort-by-random'
 715 and `gnus-article-sort-by-score'.
 716
 717 When threading is turned on, the variable `gnus-thread-sort-functions'
 718 controls how articles are sorted."
 719   :group 'gnus-summary-sort
 720   :type '(repeat (choice (function-item gnus-article-sort-by-number)
 721                          (function-item gnus-article-sort-by-author)
 722                          (function-item gnus-article-sort-by-subject)
 723                          (function-item gnus-article-sort-by-date)
 724                          (function-item gnus-article-sort-by-score)
 725                          (function-item gnus-article-sort-by-random)
 726                          (function :tag "other"))))
 727
 728 (defcustom gnus-thread-sort-functions '(gnus-thread-sort-by-number)
 729   "*List of functions used for sorting threads in the summary buffer.
 730 By default, threads are sorted by article number.
 731
 732 Each function takes two threads and returns non-nil if the first
 733 thread should be sorted before the other.  If you use more than one
 734 function, the primary sort function should be the last.  You should
 735 probably always include `gnus-thread-sort-by-number' in the list of
 736 sorting functions -- preferably first.  Also note that sorting by date
 737 is often much slower than sorting by number, and the sorting order is
 738 very similar.  (Sorting by date means sorting by the time the message
 739 was sent, sorting by number means sorting by arrival time.)
 740
 741 Ready-made functions include `gnus-thread-sort-by-number',
 742 `gnus-thread-sort-by-author', `gnus-thread-sort-by-subject',
 743 `gnus-thread-sort-by-date', `gnus-thread-sort-by-score',
 744 `gnus-thread-sort-by-most-recent-number',
 745 `gnus-thread-sort-by-most-recent-date',
 746 `gnus-thread-sort-by-random', and
 747 `gnus-thread-sort-by-total-score' (see `gnus-thread-score-function').
 748
 749 When threading is turned off, the variable
 750 `gnus-article-sort-functions' controls how articles are sorted."
 751   :group 'gnus-summary-sort
 752   :type '(repeat (choice (function-item gnus-thread-sort-by-number)
 753                          (function-item gnus-thread-sort-by-author)
 754                          (function-item gnus-thread-sort-by-subject)
 755                          (function-item gnus-thread-sort-by-date)
 756                          (function-item gnus-thread-sort-by-score)
 757                          (function-item gnus-thread-sort-by-total-score)
 758                          (function-item gnus-thread-sort-by-random)
 759                          (function :tag "other"))))
 760
 761 (defcustom gnus-thread-score-function '+
 762   "*Function used for calculating the total score of a thread.
 763
 764 The function is called with the scores of the article and each
 765 subthread and should then return the score of the thread.
 766
 767 Some functions you can use are `+', `max', or `min'."
 768   :group 'gnus-summary-sort
 769   :type 'function)
 770
 771 (defcustom gnus-summary-expunge-below nil
 772   "All articles that have a score less than this variable will be expunged.
 773 This variable is local to the summary buffers."
 774   :group 'gnus-score-default
 775   :type '(choice (const :tag "off" nil)
 776                  integer))
 777
 778 (defcustom gnus-thread-expunge-below nil
 779   "All threads that have a total score less than this variable will be expunged.
 780 See `gnus-thread-score-function' for en explanation of what a
 781 \"thread score\" is.
 782
 783 This variable is local to the summary buffers."
 784   :group 'gnus-threading
 785   :group 'gnus-score-default
 786   :type '(choice (const :tag "off" nil)
 787                  integer))
 788
 789 (defcustom gnus-summary-mode-hook nil
 790   "*A hook for Gnus summary mode.
 791 This hook is run before any variables are set in the summary buffer."
 792   :options '(turn-on-gnus-mailing-list-mode gnus-pick-mode)
 793   :group 'gnus-summary-various
 794   :type 'hook)
 795
 796 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
 797 (when (featurep 'xemacs)
 798   (add-hook 'gnus-summary-mode-hook 'gnus-xmas-summary-menu-add)
 799   (add-hook 'gnus-summary-mode-hook 'gnus-xmas-setup-summary-toolbar)
 800   (add-hook 'gnus-summary-mode-hook
 801             'gnus-xmas-switch-horizontal-scrollbar-off))
 802
 803 (defcustom gnus-summary-menu-hook nil
 804   "*Hook run after the creation of the summary mode menu."
 805   :group 'gnus-summary-visual
 806   :type 'hook)
 807
 808 (defcustom gnus-summary-exit-hook nil
 809   "*A hook called on exit from the summary buffer.
 810 It will be called with point in the group buffer."
 811   :group 'gnus-summary-exit
 812   :type 'hook)
 813
 814 (defcustom gnus-summary-prepare-hook nil
 815   "*A hook called after the summary buffer has been generated.
 816 If you want to modify the summary buffer, you can use this hook."
 817   :group 'gnus-summary-various
 818   :type 'hook)
 819
 820 (defcustom gnus-summary-prepared-hook nil
 821   "*A hook called as the last thing after the summary buffer has been generated."
 822   :group 'gnus-summary-various
 823   :type 'hook)
 824
 825 (defcustom gnus-summary-generate-hook nil
 826   "*A hook run just before generating the summary buffer.
 827 This hook is commonly used to customize threading variables and the
 828 like."
 829   :group 'gnus-summary-various
 830   :type 'hook)
 831
 832 (defcustom gnus-select-group-hook nil
 833   "*A hook called when a newsgroup is selected.
 834
 835 If you'd like to simplify subjects like the
 836 `gnus-summary-next-same-subject' command does, you can use the
 837 following hook:
 838
 839  (add-hook gnus-select-group-hook
 840            (lambda ()
 841              (mapcar (lambda (header)
 842                        (mail-header-set-subject
 843                         header
 844                         (gnus-simplify-subject
 845                          (mail-header-subject header) 're-only)))
 846                      gnus-newsgroup-headers)))"
 847   :group 'gnus-group-select
 848   :type 'hook)
 849
 850 (defcustom gnus-select-article-hook nil
 851   "*A hook called when an article is selected."
 852   :group 'gnus-summary-choose
 853   :options '(gnus-agent-fetch-selected-article)
 854   :type 'hook)
 855
 856 (defcustom gnus-visual-mark-article-hook
 857   (list 'gnus-highlight-selected-summary)
 858   "*Hook run after selecting an article in the summary buffer.
 859 It is meant to be used for highlighting the article in some way.  It
 860 is not run if `gnus-visual' is nil."
 861   :group 'gnus-summary-visual
 862   :type 'hook)
 863
 864 (defcustom gnus-parse-headers-hook nil
 865   "*A hook called before parsing the headers."
 866   :group 'gnus-various
 867   :type 'hook)
 868
 869 (defcustom gnus-exit-group-hook nil
 870   "*A hook called when exiting summary mode.
 871 This hook is not called from the non-updating exit commands like `Q'."
 872   :group 'gnus-various
 873   :type 'hook)
 874
 875 (defcustom gnus-summary-update-hook
 876   (list 'gnus-summary-highlight-line)
 877   "*A hook called when a summary line is changed.
 878 The hook will not be called if `gnus-visual' is nil.
 879
 880 The default function `gnus-summary-highlight-line' will
 881 highlight the line according to the `gnus-summary-highlight'
 882 variable."
 883   :group 'gnus-summary-visual
 884   :type 'hook)
 885
 886 (defcustom gnus-mark-article-hook '(gnus-summary-mark-read-and-unread-as-read)
 887   "*A hook called when an article is selected for the first time.
 888 The hook is intended to mark an article as read (or unread)
 889 automatically when it is selected."
 890   :group 'gnus-summary-choose
 891   :type 'hook)
 892
 893 (defcustom gnus-group-no-more-groups-hook nil
 894   "*A hook run when returning to group mode having no more (unread) groups."
 895   :group 'gnus-group-select
 896   :type 'hook)
 897
 898 (defcustom gnus-ps-print-hook nil
 899   "*A hook run before ps-printing something from Gnus."
 900   :group 'gnus-summary
 901   :type 'hook)
 902
 903 (defcustom gnus-summary-article-move-hook nil
 904   "*A hook called after an article is moved, copied, respooled, or crossposted."
 905   :version "22.1"
 906   :group 'gnus-summary
 907   :type 'hook)
 908
 909 (defcustom gnus-summary-article-delete-hook nil
 910   "*A hook called after an article is deleted."
 911   :version "22.1"
 912   :group 'gnus-summary
 913   :type 'hook)
 914
 915 (defcustom gnus-summary-article-expire-hook nil
 916   "*A hook called after an article is expired."
 917   :version "22.1"
 918   :group 'gnus-summary
 919   :type 'hook)
 920
 921 (defcustom gnus-summary-display-arrow
 922   (and (fboundp 'display-graphic-p)
 923        (display-graphic-p))
 924   "*If non-nil, display an arrow highlighting the current article."
 925   :version "22.1"
 926   :group 'gnus-summary
 927   :type 'boolean)
 928
 929 (defcustom gnus-summary-selected-face 'gnus-summary-selected
 930   "Face used for highlighting the current article in the summary buffer."
 931   :group 'gnus-summary-visual
 932   :type 'face)
 933
 934 (defvar gnus-tmp-downloaded nil)
 935
 936 (defcustom gnus-summary-highlight
 937   '(((eq mark gnus-canceled-mark)
 938      . gnus-summary-cancelled)
 939     ((and uncached (> score default-high))
 940      . gnus-summary-high-undownloaded)
 941     ((and uncached (< score default-low))
 942      . gnus-summary-low-undownloaded)
 943     (uncached
 944      . gnus-summary-normal-undownloaded)
 945     ((and (> score default-high)
 946           (or (eq mark gnus-dormant-mark)
 947               (eq mark gnus-ticked-mark)))
 948      . gnus-summary-high-ticked)
 949     ((and (< score default-low)
 950           (or (eq mark gnus-dormant-mark)
 951               (eq mark gnus-ticked-mark)))
 952      . gnus-summary-low-ticked)
 953     ((or (eq mark gnus-dormant-mark)
 954          (eq mark gnus-ticked-mark))
 955      . gnus-summary-normal-ticked)
 956     ((and (> score default-high) (eq mark gnus-ancient-mark))
 957      . gnus-summary-high-ancient)
 958     ((and (< score default-low) (eq mark gnus-ancient-mark))
 959      . gnus-summary-low-ancient)
 960     ((eq mark gnus-ancient-mark)
 961      . gnus-summary-normal-ancient)
 962     ((and (> score default-high) (eq mark gnus-unread-mark))
 963      . gnus-summary-high-unread)
 964     ((and (< score default-low) (eq mark gnus-unread-mark))
 965      . gnus-summary-low-unread)
 966     ((eq mark gnus-unread-mark)
 967      . gnus-summary-normal-unread)
 968     ((> score default-high)
 969      . gnus-summary-high-read)
 970     ((< score default-low)
 971      . gnus-summary-low-read)
 972     (t
 973      . gnus-summary-normal-read))
 974   "*Controls the highlighting of summary buffer lines.
 975
 976 A list of (FORM . FACE) pairs.  When deciding how a particular
 977 summary line should be displayed, each form is evaluated.  The content
 978 of the face field after the first true form is used.  You can change
 979 how those summary lines are displayed, by editing the face field.
 980
 981 You can use the following variables in the FORM field.
 982
 983 score:        The article's score.
 984 default:      The default article score.
 985 default-high: The default score for high scored articles.
 986 default-low:  The default score for low scored articles.
 987 below:        The score below which articles are automatically marked as read.
 988 mark:         The article's mark.
 989 uncached:     Non-nil if the article is uncached."
 990   :group 'gnus-summary-visual
 991   :type '(repeat (cons (sexp :tag "Form" nil)
 992                        face)))
 993
 994 (defcustom gnus-alter-header-function nil
 995   "Function called to allow alteration of article header structures.
 996 The function is called with one parameter, the article header vector,
 997 which it may alter in any way."
 998   :type '(choice (const :tag "None" nil)
 999                  function)
1000   :group 'gnus-summary)
1001
1002 (defvar gnus-decode-encoded-word-function 'mail-decode-encoded-word-string
1003   "Function used to decode a string with encoded words.")
1004
1005 (defvar gnus-decode-encoded-address-function
1006   'mail-decode-encoded-address-string
1007   "Function used to decode addresses with encoded words.")
1008
1009 (defcustom gnus-extra-headers '(To Newsgroups)
1010   "*Extra headers to parse."
1011   :version "21.1"
1012   :group 'gnus-summary
1013   :type '(repeat symbol))
1014
1015 (defcustom gnus-ignored-from-addresses
1016   (and user-mail-address
1017        (not (string= user-mail-address ""))
1018        (regexp-quote user-mail-address))
1019   "*Regexp of From headers that may be suppressed in favor of To headers."
1020   :version "21.1"
1021   :group 'gnus-summary
1022   :type 'regexp)
1023
1024 (defcustom gnus-newsgroup-ignored-charsets '(unknown-8bit x-unknown)
1025   "List of charsets that should be ignored.
1026 When these charsets are used in the \"charset\" parameter, the
1027 default charset will be used instead."
1028   :version "21.1"
1029   :type '(repeat symbol)
1030   :group 'gnus-charset)
1031
1032 (defcustom gnus-newsgroup-maximum-articles nil
1033   "The maximum number of articles a newsgroup.
1034 If this is a number, old articles in a newsgroup exceeding this number
1035 are silently ignored.  If it is nil, no article is ignored.  Note that
1036 setting this variable to a number might prevent you from reading very
1037 old articles."
1038   :group 'gnus-group-select
1039   :version "22.2"
1040   :type '(choice (const :tag "No limit" nil)
1041                  integer))
1042
1043 (gnus-define-group-parameter
1044  ignored-charsets
1045  :type list
1046  :function-document
1047  "Return the ignored charsets of GROUP."
1048  :variable gnus-group-ignored-charsets-alist
1049  :variable-default
1050  '(("alt\\.chinese\\.text" iso-8859-1))
1051  :variable-document
1052  "Alist of regexps (to match group names) and charsets that should be ignored.
1053 When these charsets are used in the \"charset\" parameter, the
1054 default charset will be used instead."
1055  :variable-group gnus-charset
1056  :variable-type '(repeat (cons (regexp :tag "Group")
1057                                (repeat symbol)))
1058  :parameter-type '(choice :tag "Ignored charsets"
1059                           :value nil
1060                           (repeat (symbol)))
1061  :parameter-document       "\
1062 List of charsets that should be ignored.
1063
1064 When these charsets are used in the \"charset\" parameter, the
1065 default charset will be used instead.")
1066
1067 (defcustom gnus-group-highlight-words-alist nil
1068   "Alist of group regexps and highlight regexps.
1069 This variable uses the same syntax as `gnus-emphasis-alist'."
1070   :version "21.1"
1071   :type '(repeat (cons (regexp :tag "Group")
1072                        (repeat (list (regexp :tag "Highlight regexp")
1073                                      (number :tag "Group for entire word" 0)
1074                                      (number :tag "Group for displayed part" 0)
1075                                      (symbol :tag "Face"
1076                                              gnus-emphasis-highlight-words)))))
1077   :group 'gnus-summary-visual)
1078
1079 (defcustom gnus-summary-show-article-charset-alist
1080   nil
1081   "Alist of number and charset.
1082 The article will be shown with the charset corresponding to the
1083 numbered argument.
1084 For example: ((1 . cn-gb-2312) (2 . big5))."
1085   :version "21.1"
1086   :type '(repeat (cons (number :tag "Argument" 1)
1087                        (symbol :tag "Charset")))
1088   :group 'gnus-charset)
1089
1090 (defcustom gnus-preserve-marks t
1091   "Whether marks are preserved when moving, copying and respooling messages."
1092   :version "21.1"
1093   :type 'boolean
1094   :group 'gnus-summary-marks)
1095
1096 (defcustom gnus-alter-articles-to-read-function nil
1097   "Function to be called to alter the list of articles to be selected."
1098   :type '(choice (const nil) function)
1099   :group 'gnus-summary)
1100
1101 (defcustom gnus-orphan-score nil
1102   "*All orphans get this score added.  Set in the score file."
1103   :group 'gnus-score-default
1104   :type '(choice (const nil)
1105                  integer))
1106
1107 (defcustom gnus-summary-save-parts-default-mime "image/.*"
1108   "*A regexp to match MIME parts when saving multiple parts of a
1109 message with `gnus-summary-save-parts' (\\<gnus-summary-mode-map>\\[gnus-summary-save-parts]).
1110 This regexp will be used by default when prompting the user for which
1111 type of files to save."
1112   :group 'gnus-summary
1113   :type 'regexp)
1114
1115 (defcustom gnus-read-all-available-headers nil
1116   "Whether Gnus should parse all headers made available to it.
1117 This is mostly relevant for slow back ends where the user may
1118 wish to widen the summary buffer to include all headers
1119 that were fetched.  Say, for nnultimate groups."
1120   :version "22.1"
1121   :group 'gnus-summary
1122   :type '(choice boolean regexp))
1123
1124 (defcustom gnus-summary-muttprint-program "muttprint"
1125   "Command (and optional arguments) used to run Muttprint."
1126   :version "22.1"
1127   :group 'gnus-summary
1128   :type 'string)
1129
1130 (defcustom gnus-article-loose-mime nil
1131   "If non-nil, don't require MIME-Version header.
1132 Some brain-damaged MUA/MTA, e.g. Lotus Domino 5.0.6 clients, does not
1133 supply the MIME-Version header or deliberately strip it from the mail.
1134 Set it to non-nil, Gnus will treat some articles as MIME even if
1135 the MIME-Version header is missed."
1136   :version "22.1"
1137   :type 'boolean
1138   :group 'gnus-article-mime)
1139
1140 (defcustom gnus-article-emulate-mime t
1141   "If non-nil, use MIME emulation for uuencode and the like.
1142 This means that Gnus will search message bodies for text that look
1143 like uuencoded bits, yEncoded bits, and so on, and present that using
1144 the normal Gnus MIME machinery."
1145   :version "22.1"
1146   :type 'boolean
1147   :group 'gnus-article-mime)
1148
1149 ;;; Internal variables
1150
1151 (defvar gnus-summary-display-cache nil)
1152 (defvar gnus-article-mime-handles nil)
1153 (defvar gnus-article-decoded-p nil)
1154 (defvar gnus-article-charset nil)
1155 (defvar gnus-article-ignored-charsets nil)
1156 (defvar gnus-scores-exclude-files nil)
1157 (defvar gnus-page-broken nil)
1158
1159 (defvar gnus-original-article nil)
1160 (defvar gnus-article-internal-prepare-hook nil)
1161 (defvar gnus-newsgroup-process-stack nil)
1162
1163 (defvar gnus-thread-indent-array nil)
1164 (defvar gnus-thread-indent-array-level gnus-thread-indent-level)
1165 (defvar gnus-sort-gathered-threads-function 'gnus-thread-sort-by-number
1166   "Function called to sort the articles within a thread after it has been gathered together.")
1167
1168 (defvar gnus-summary-save-parts-type-history nil)
1169 (defvar gnus-summary-save-parts-last-directory mm-default-directory)
1170
1171 ;; Avoid highlighting in kill files.
1172 (defvar gnus-summary-inhibit-highlight nil)
1173 (defvar gnus-newsgroup-selected-overlay nil)
1174 (defvar gnus-inhibit-limiting nil)
1175 (defvar gnus-newsgroup-adaptive-score-file nil)
1176 (defvar gnus-current-score-file nil)
1177 (defvar gnus-current-move-group nil)
1178 (defvar gnus-current-copy-group nil)
1179 (defvar gnus-current-crosspost-group nil)
1180 (defvar gnus-newsgroup-display nil)
1181
1182 (defvar gnus-newsgroup-dependencies nil)
1183 (defvar gnus-newsgroup-adaptive nil)
1184 (defvar gnus-summary-display-article-function nil)
1185 (defvar gnus-summary-highlight-line-function nil
1186   "Function called after highlighting a summary line.")
1187
1188 (defvar gnus-summary-line-format-alist
1189   `((?N ,(macroexpand '(mail-header-number gnus-tmp-header)) ?d)
1190     (?S ,(macroexpand '(mail-header-subject gnus-tmp-header)) ?s)
1191     (?s gnus-tmp-subject-or-nil ?s)
1192     (?n gnus-tmp-name ?s)
1193     (?A (car (cdr (funcall gnus-extract-address-components gnus-tmp-from)))
1194         ?s)
1195     (?a (or (car (funcall gnus-extract-address-components gnus-tmp-from))
1196             gnus-tmp-from) ?s)
1197     (?F gnus-tmp-from ?s)
1198     (?x ,(macroexpand '(mail-header-xref gnus-tmp-header)) ?s)
1199     (?D ,(macroexpand '(mail-header-date gnus-tmp-header)) ?s)
1200     (?d (gnus-dd-mmm (mail-header-date gnus-tmp-header)) ?s)
1201     (?o (gnus-date-iso8601 (mail-header-date gnus-tmp-header)) ?s)
1202     (?M ,(macroexpand '(mail-header-id gnus-tmp-header)) ?s)
1203     (?r ,(macroexpand '(mail-header-references gnus-tmp-header)) ?s)
1204     (?c (or (mail-header-chars gnus-tmp-header) 0) ?d)
1205     (?k (gnus-summary-line-message-size gnus-tmp-header) ?s)
1206     (?L gnus-tmp-lines ?s)
1207     (?O gnus-tmp-downloaded ?c)
1208     (?I gnus-tmp-indentation ?s)
1209     (?T (if (= gnus-tmp-level 0) "" (make-string (frame-width) ? )) ?s)
1210     (?R gnus-tmp-replied ?c)
1211     (?\[ gnus-tmp-opening-bracket ?c)
1212     (?\] gnus-tmp-closing-bracket ?c)
1213     (?\> (make-string gnus-tmp-level ? ) ?s)
1214     (?\< (make-string (max 0 (- 20 gnus-tmp-level)) ? ) ?s)
1215     (?i gnus-tmp-score ?d)
1216     (?z gnus-tmp-score-char ?c)
1217     (?l (bbb-grouplens-score gnus-tmp-header) ?s)
1218     (?V (gnus-thread-total-score (and (boundp 'thread) (car thread))) ?d)
1219     (?U gnus-tmp-unread ?c)
1220     (?f (gnus-summary-from-or-to-or-newsgroups gnus-tmp-header gnus-tmp-from)
1221         ?s)
1222     (?t (gnus-summary-number-of-articles-in-thread
1223          (and (boundp 'thread) (car thread)) gnus-tmp-level)
1224         ?d)
1225     (?e (gnus-summary-number-of-articles-in-thread
1226          (and (boundp 'thread) (car thread)) gnus-tmp-level t)
1227         ?c)
1228     (?u gnus-tmp-user-defined ?s)
1229     (?P (gnus-pick-line-number) ?d)
1230     (?B gnus-tmp-thread-tree-header-string ?s)
1231     (user-date (gnus-user-date
1232                 ,(macroexpand '(mail-header-date gnus-tmp-header))) ?s))
1233   "An alist of format specifications that can appear in summary lines.
1234 These are paired with what variables they correspond with, along with
1235 the type of the variable (string, integer, character, etc).")
1236
1237 (defvar gnus-summary-dummy-line-format-alist
1238   `((?S gnus-tmp-subject ?s)
1239     (?N gnus-tmp-number ?d)
1240     (?u gnus-tmp-user-defined ?s)))
1241
1242 (defvar gnus-summary-mode-line-format-alist
1243   `((?G gnus-tmp-group-name ?s)
1244     (?g (gnus-short-group-name gnus-tmp-group-name) ?s)
1245     (?p (gnus-group-real-name gnus-tmp-group-name) ?s)
1246     (?A gnus-tmp-article-number ?d)
1247     (?Z gnus-tmp-unread-and-unselected ?s)
1248     (?V gnus-version ?s)
1249     (?U gnus-tmp-unread-and-unticked ?d)
1250     (?S gnus-tmp-subject ?s)
1251     (?e gnus-tmp-unselected ?d)
1252     (?u gnus-tmp-user-defined ?s)
1253     (?d (length gnus-newsgroup-dormant) ?d)
1254     (?t (length gnus-newsgroup-marked) ?d)
1255     (?h (length gnus-newsgroup-spam-marked) ?d)
1256     (?r (length gnus-newsgroup-reads) ?d)
1257     (?z (gnus-summary-article-score gnus-tmp-article-number) ?d)
1258     (?E gnus-newsgroup-expunged-tally ?d)
1259     (?s (gnus-current-score-file-nondirectory) ?s)))
1260
1261 (defvar gnus-last-search-regexp nil
1262   "Default regexp for article search command.")
1263
1264 (defvar gnus-last-shell-command nil
1265   "Default shell command on article.")
1266
1267 (defvar gnus-newsgroup-agentized nil
1268   "Locally bound in each summary buffer to indicate whether the server has been agentized.")
1269 (defvar gnus-newsgroup-begin nil)
1270 (defvar gnus-newsgroup-end nil)
1271 (defvar gnus-newsgroup-last-rmail nil)
1272 (defvar gnus-newsgroup-last-mail nil)
1273 (defvar gnus-newsgroup-last-folder nil)
1274 (defvar gnus-newsgroup-last-file nil)
1275 (defvar gnus-newsgroup-last-directory nil)
1276 (defvar gnus-newsgroup-auto-expire nil)
1277 (defvar gnus-newsgroup-active nil)
1278
1279 (defvar gnus-newsgroup-data nil)
1280 (defvar gnus-newsgroup-data-reverse nil)
1281 (defvar gnus-newsgroup-limit nil)
1282 (defvar gnus-newsgroup-limits nil)
1283 (defvar gnus-summary-use-undownloaded-faces nil)
1284
1285 (defvar gnus-newsgroup-unreads nil
1286   "Sorted list of unread articles in the current newsgroup.")
1287
1288 (defvar gnus-newsgroup-unselected nil
1289   "Sorted list of unselected unread articles in the current newsgroup.")
1290
1291 (defvar gnus-newsgroup-reads nil
1292   "Alist of read articles and article marks in the current newsgroup.")
1293
1294 (defvar gnus-newsgroup-expunged-tally nil)
1295
1296 (defvar gnus-newsgroup-marked nil
1297   "Sorted list of ticked articles in the current newsgroup (a subset of unread art).")
1298
1299 (defvar gnus-newsgroup-spam-marked nil
1300   "List of ranges of articles that have been marked as spam.")
1301
1302 (defvar gnus-newsgroup-killed nil
1303   "List of ranges of articles that have been through the scoring process.")
1304
1305 (defvar gnus-newsgroup-cached nil
1306   "Sorted list of articles that come from the article cache.")
1307
1308 (defvar gnus-newsgroup-saved nil
1309   "List of articles that have been saved.")
1310
1311 (defvar gnus-newsgroup-kill-headers nil)
1312
1313 (defvar gnus-newsgroup-replied nil
1314   "List of articles that have been replied to in the current newsgroup.")
1315
1316 (defvar gnus-newsgroup-forwarded nil
1317   "List of articles that have been forwarded in the current newsgroup.")
1318
1319 (defvar gnus-newsgroup-recent nil
1320   "List of articles that have are recent in the current newsgroup.")
1321
1322 (defvar gnus-newsgroup-expirable nil
1323   "Sorted list of articles in the current newsgroup that can be expired.")
1324
1325 (defvar gnus-newsgroup-processable nil
1326   "List of articles in the current newsgroup that can be processed.")
1327
1328 (defvar gnus-newsgroup-downloadable nil
1329   "Sorted list of articles in the current newsgroup that can be processed.")
1330
1331 (defvar gnus-newsgroup-unfetched nil
1332   "Sorted list of articles in the current newsgroup whose headers have
1333 not been fetched into the agent.
1334
1335 This list will always be a subset of gnus-newsgroup-undownloaded.")
1336
1337 (defvar gnus-newsgroup-undownloaded nil
1338   "List of articles in the current newsgroup that haven't been downloaded.")
1339
1340 (defvar gnus-newsgroup-unsendable nil
1341   "List of articles in the current newsgroup that won't be sent.")
1342
1343 (defvar gnus-newsgroup-bookmarks nil
1344   "List of articles in the current newsgroup that have bookmarks.")
1345
1346 (defvar gnus-newsgroup-dormant nil
1347   "Sorted list of dormant articles in the current newsgroup.")
1348
1349 (defvar gnus-newsgroup-unseen nil
1350   "List of unseen articles in the current newsgroup.")
1351
1352 (defvar gnus-newsgroup-seen nil
1353   "Range of seen articles in the current newsgroup.")
1354
1355 (defvar gnus-newsgroup-articles nil
1356   "List of articles in the current newsgroup.")
1357
1358 (defvar gnus-newsgroup-scored nil
1359   "List of scored articles in the current newsgroup.")
1360
1361 (defvar gnus-newsgroup-headers nil
1362   "List of article headers in the current newsgroup.")
1363
1364 (defvar gnus-newsgroup-threads nil)
1365
1366 (defvar gnus-newsgroup-prepared nil
1367   "Whether the current group has been prepared properly.")
1368
1369 (defvar gnus-newsgroup-ancient nil
1370   "List of `gnus-fetch-old-headers' articles in the current newsgroup.")
1371
1372 (defvar gnus-newsgroup-sparse nil)
1373
1374 (defvar gnus-current-article nil)
1375 (defvar gnus-article-current nil)
1376 (defvar gnus-current-headers nil)
1377 (defvar gnus-have-all-headers nil)
1378 (defvar gnus-last-article nil)
1379 (defvar gnus-newsgroup-history nil)
1380 (defvar gnus-newsgroup-charset nil)
1381 (defvar gnus-newsgroup-ephemeral-charset nil)
1382 (defvar gnus-newsgroup-ephemeral-ignored-charsets nil)
1383
1384 (defvar gnus-article-before-search nil)
1385
1386 (defvar gnus-summary-local-variables
1387   '(gnus-newsgroup-name
1388     gnus-newsgroup-begin gnus-newsgroup-end
1389     gnus-newsgroup-last-rmail gnus-newsgroup-last-mail
1390     gnus-newsgroup-last-folder gnus-newsgroup-last-file
1391     gnus-newsgroup-last-directory
1392     gnus-newsgroup-auto-expire gnus-newsgroup-unreads
1393     gnus-newsgroup-unselected gnus-newsgroup-marked
1394     gnus-newsgroup-spam-marked
1395     gnus-newsgroup-reads gnus-newsgroup-saved
1396     gnus-newsgroup-replied gnus-newsgroup-forwarded
1397     gnus-newsgroup-recent
1398     gnus-newsgroup-expirable
1399     gnus-newsgroup-processable gnus-newsgroup-killed
1400     gnus-newsgroup-downloadable gnus-newsgroup-undownloaded
1401     gnus-newsgroup-unfetched
1402     gnus-newsgroup-unsendable gnus-newsgroup-unseen
1403     gnus-newsgroup-seen gnus-newsgroup-articles
1404     gnus-newsgroup-bookmarks gnus-newsgroup-dormant
1405     gnus-newsgroup-headers gnus-newsgroup-threads
1406     gnus-newsgroup-prepared gnus-summary-highlight-line-function
1407     gnus-current-article gnus-current-headers gnus-have-all-headers
1408     gnus-last-article gnus-article-internal-prepare-hook
1409     gnus-newsgroup-dependencies gnus-newsgroup-selected-overlay
1410     gnus-newsgroup-scored gnus-newsgroup-kill-headers
1411     gnus-thread-expunge-below
1412     gnus-score-alist gnus-current-score-file
1413     (gnus-summary-expunge-below . global)
1414     (gnus-summary-mark-below . global)
1415     (gnus-orphan-score . global)
1416     gnus-newsgroup-active gnus-scores-exclude-files
1417     gnus-newsgroup-history gnus-newsgroup-ancient
1418     gnus-newsgroup-sparse gnus-newsgroup-process-stack
1419     (gnus-newsgroup-adaptive . gnus-use-adaptive-scoring)
1420     gnus-newsgroup-adaptive-score-file (gnus-reffed-article-number . -1)
1421     (gnus-newsgroup-expunged-tally . 0)
1422     gnus-cache-removable-articles gnus-newsgroup-cached
1423     gnus-newsgroup-data gnus-newsgroup-data-reverse
1424     gnus-newsgroup-limit gnus-newsgroup-limits
1425     gnus-newsgroup-charset gnus-newsgroup-display
1426     gnus-summary-use-undownloaded-faces)
1427   "Variables that are buffer-local to the summary buffers.")
1428
1429 (defvar gnus-newsgroup-variables nil
1430   "A list of variables that have separate values in different newsgroups.
1431 A list of newsgroup (summary buffer) local variables, or cons of
1432 variables and their default expressions to be evalled (when the default
1433 values are not nil), that should be made global while the summary buffer
1434 is active.
1435
1436 Note: The default expressions will be evaluated (using function `eval')
1437 before assignment to the local variable rather than just assigned to it.
1438 If the default expression is the symbol `global', that symbol will not
1439 be evaluated but the global value of the local variable will be used
1440 instead.
1441
1442 These variables can be used to set variables in the group parameters
1443 while still allowing them to affect operations done in other buffers.
1444 For example:
1445
1446 \(setq gnus-newsgroup-variables
1447      '(message-use-followup-to
1448        (gnus-visible-headers .
1449          \"^From:\\\\|^Newsgroups:\\\\|^Subject:\\\\|^Date:\\\\|^To:\")))
1450 ")
1451
1452 ;; Byte-compiler warning.
1453 (eval-when-compile
1454   ;; Bind features so that require will believe that gnus-sum has
1455   ;; already been loaded (avoids infinite recursion)
1456   (let ((features (cons 'gnus-sum features)))
1457     ;; Several of the declarations in gnus-sum are needed to load the
1458     ;; following files. Right now, these definitions have been
1459     ;; compiled but not defined (evaluated).  We could either do a
1460     ;; eval-and-compile about all of the declarations or evaluate the
1461     ;; source file.
1462     (if (boundp 'gnus-newsgroup-variables)
1463         nil
1464       (load "gnus-sum.el" t t t))
1465     (require 'gnus)
1466     (require 'gnus-agent)
1467     (require 'gnus-art)))
1468
1469 ;; MIME stuff.
1470
1471 (defvar gnus-decode-encoded-word-methods
1472   '(mail-decode-encoded-word-string)
1473   "List of methods used to decode encoded words.
1474
1475 This variable is a list of FUNCTION or (REGEXP . FUNCTION).  If item
1476 is FUNCTION, FUNCTION will be apply to all newsgroups.  If item is a
1477 \(REGEXP . FUNCTION), FUNCTION will be only apply to thes newsgroups
1478 whose names match REGEXP.
1479
1480 For example:
1481 \((\"chinese\" . gnus-decode-encoded-word-string-by-guess)
1482  mail-decode-encoded-word-string
1483  (\"chinese\" . rfc1843-decode-string))")
1484
1485 (defvar gnus-decode-encoded-word-methods-cache nil)
1486
1487 (defun gnus-multi-decode-encoded-word-string (string)
1488   "Apply the functions from `gnus-encoded-word-methods' that match."
1489   (unless (and gnus-decode-encoded-word-methods-cache
1490                (eq gnus-newsgroup-name
1491                    (car gnus-decode-encoded-word-methods-cache)))
1492     (setq gnus-decode-encoded-word-methods-cache (list gnus-newsgroup-name))
1493     (mapcar (lambda (x)
1494               (if (symbolp x)
1495                   (nconc gnus-decode-encoded-word-methods-cache (list x))
1496                 (if (and gnus-newsgroup-name
1497                          (string-match (car x) gnus-newsgroup-name))
1498                     (nconc gnus-decode-encoded-word-methods-cache
1499                            (list (cdr x))))))
1500             gnus-decode-encoded-word-methods))
1501   (let ((xlist gnus-decode-encoded-word-methods-cache))
1502     (pop xlist)
1503     (while xlist
1504       (setq string (funcall (pop xlist) string))))
1505   string)
1506
1507 ;; Subject simplification.
1508
1509 (defun gnus-simplify-whitespace (str)
1510   "Remove excessive whitespace from STR."
1511   ;; Multiple spaces.
1512   (while (string-match "[ \t][ \t]+" str)
1513     (setq str (concat (substring str 0 (match-beginning 0))
1514                         " "
1515                         (substring str (match-end 0)))))
1516   ;; Leading spaces.
1517   (when (string-match "^[ \t]+" str)
1518     (setq str (substring str (match-end 0))))
1519   ;; Trailing spaces.
1520   (when (string-match "[ \t]+$" str)
1521     (setq str (substring str 0 (match-beginning 0))))
1522   str)
1523
1524 (defun gnus-simplify-all-whitespace (str)
1525   "Remove all whitespace from STR."
1526   (while (string-match "[ \t\n]+" str)
1527     (setq str (replace-match "" nil nil str)))
1528   str)
1529
1530 (defsubst gnus-simplify-subject-re (subject)
1531   "Remove \"Re:\" from subject lines."
1532   (if (string-match message-subject-re-regexp subject)
1533       (substring subject (match-end 0))
1534     subject))
1535
1536 (defun gnus-simplify-subject (subject &optional re-only)
1537   "Remove `Re:' and words in parentheses.
1538 If RE-ONLY is non-nil, strip leading `Re:'s only."
1539   (let ((case-fold-search t))           ;Ignore case.
1540     ;; Remove `Re:', `Re^N:', `Re(n)', and `Re[n]:'.
1541     (when (string-match "\\`\\(re\\([[(^][0-9]+[])]?\\)?:[ \t]*\\)+" subject)
1542       (setq subject (substring subject (match-end 0))))
1543     ;; Remove uninteresting prefixes.
1544     (when (and (not re-only)
1545                gnus-simplify-ignored-prefixes
1546                (string-match gnus-simplify-ignored-prefixes subject))
1547       (setq subject (substring subject (match-end 0))))
1548     ;; Remove words in parentheses from end.
1549     (unless re-only
1550       (while (string-match "[ \t\n]*([^()]*)[ \t\n]*\\'" subject)
1551         (setq subject (substring subject 0 (match-beginning 0)))))
1552     ;; Return subject string.
1553     subject))
1554
1555 ;; Remove any leading "re:"s, any trailing paren phrases, and simplify
1556 ;; all whitespace.
1557 (defsubst gnus-simplify-buffer-fuzzy-step (regexp &optional newtext)
1558   (goto-char (point-min))
1559   (while (re-search-forward regexp nil t)
1560     (replace-match (or newtext ""))))
1561
1562 (defun gnus-simplify-buffer-fuzzy ()
1563   "Simplify string in the buffer fuzzily.
1564 The string in the accessible portion of the current buffer is simplified.
1565 It is assumed to be a single-line subject.
1566 Whitespace is generally cleaned up, and miscellaneous leading/trailing
1567 matter is removed.  Additional things can be deleted by setting
1568 `gnus-simplify-subject-fuzzy-regexp'."
1569   (let ((case-fold-search t)
1570         (modified-tick))
1571     (gnus-simplify-buffer-fuzzy-step "\t" " ")
1572
1573     (while (not (eq modified-tick (buffer-modified-tick)))
1574       (setq modified-tick (buffer-modified-tick))
1575       (cond
1576        ((listp gnus-simplify-subject-fuzzy-regexp)
1577         (mapcar 'gnus-simplify-buffer-fuzzy-step
1578                 gnus-simplify-subject-fuzzy-regexp))
1579        (gnus-simplify-subject-fuzzy-regexp
1580         (gnus-simplify-buffer-fuzzy-step gnus-simplify-subject-fuzzy-regexp)))
1581       (gnus-simplify-buffer-fuzzy-step "^ *\\[[-+?*!][-+?*!]\\] *")
1582       (gnus-simplify-buffer-fuzzy-step
1583        "^ *\\(re\\|fw\\|fwd\\)[[{(^0-9]*[])}]?[:;] *")
1584       (gnus-simplify-buffer-fuzzy-step "^[[].*:\\( .*\\)[]]$" "\\1"))
1585
1586     (gnus-simplify-buffer-fuzzy-step " *[[{(][^()\n]*[]})] *$")
1587     (gnus-simplify-buffer-fuzzy-step "  +" " ")
1588     (gnus-simplify-buffer-fuzzy-step " $")
1589     (gnus-simplify-buffer-fuzzy-step "^ +")))
1590
1591 (defun gnus-simplify-subject-fuzzy (subject)
1592   "Simplify a subject string fuzzily.
1593 See `gnus-simplify-buffer-fuzzy' for details."
1594   (save-excursion
1595     (gnus-set-work-buffer)
1596     (let ((case-fold-search t))
1597       ;; Remove uninteresting prefixes.
1598       (when (and gnus-simplify-ignored-prefixes
1599                  (string-match gnus-simplify-ignored-prefixes subject))
1600         (setq subject (substring subject (match-end 0))))
1601       (insert subject)
1602       (inline (gnus-simplify-buffer-fuzzy))
1603       (buffer-string))))
1604
1605 (defsubst gnus-simplify-subject-fully (subject)
1606   "Simplify a subject string according to `gnus-summary-gather-subject-limit'."
1607   (cond
1608    (gnus-simplify-subject-functions
1609     (gnus-map-function gnus-simplify-subject-functions subject))
1610    ((null gnus-summary-gather-subject-limit)
1611     (gnus-simplify-subject-re subject))
1612    ((eq gnus-summary-gather-subject-limit 'fuzzy)
1613     (gnus-simplify-subject-fuzzy subject))
1614    ((numberp gnus-summary-gather-subject-limit)
1615     (gnus-limit-string (gnus-simplify-subject-re subject)
1616                        gnus-summary-gather-subject-limit))
1617    (t
1618     subject)))
1619
1620 (defsubst gnus-subject-equal (s1 s2 &optional simple-first)
1621   "Check whether two subjects are equal.
1622 If optional argument SIMPLE-FIRST is t, first argument is already
1623 simplified."
1624   (cond
1625    ((null simple-first)
1626     (equal (gnus-simplify-subject-fully s1)
1627            (gnus-simplify-subject-fully s2)))
1628    (t
1629     (equal s1
1630            (gnus-simplify-subject-fully s2)))))
1631
1632 (defun gnus-summary-bubble-group ()
1633   "Increase the score of the current group.
1634 This is a handy function to add to `gnus-summary-exit-hook' to
1635 increase the score of each group you read."
1636   (gnus-group-add-score gnus-newsgroup-name))
1637
1638 \f
1639 ;;;
1640 ;;; Gnus summary mode
1641 ;;;
1642
1643 (put 'gnus-summary-mode 'mode-class 'special)
1644
1645 (defvar gnus-article-commands-menu)
1646
1647 ;; Non-orthogonal keys
1648
1649 (gnus-define-keys gnus-summary-mode-map
1650   " " gnus-summary-next-page
1651   "\177" gnus-summary-prev-page
1652   [delete] gnus-summary-prev-page
1653   [backspace] gnus-summary-prev-page
1654   "\r" gnus-summary-scroll-up
1655   "\M-\r" gnus-summary-scroll-down
1656   "n" gnus-summary-next-unread-article
1657   "p" gnus-summary-prev-unread-article
1658   "N" gnus-summary-next-article
1659   "P" gnus-summary-prev-article
1660   "\M-\C-n" gnus-summary-next-same-subject
1661   "\M-\C-p" gnus-summary-prev-same-subject
1662   "\M-n" gnus-summary-next-unread-subject
1663   "\M-p" gnus-summary-prev-unread-subject
1664   "." gnus-summary-first-unread-article
1665   "," gnus-summary-best-unread-article
1666   "\M-s" gnus-summary-search-article-forward
1667   "\M-r" gnus-summary-search-article-backward
1668   "<" gnus-summary-beginning-of-article
1669   ">" gnus-summary-end-of-article
1670   "j" gnus-summary-goto-article
1671   "^" gnus-summary-refer-parent-article
1672   "\M-^" gnus-summary-refer-article
1673   "u" gnus-summary-tick-article-forward
1674   "!" gnus-summary-tick-article-forward
1675   "U" gnus-summary-tick-article-backward
1676   "d" gnus-summary-mark-as-read-forward
1677   "D" gnus-summary-mark-as-read-backward
1678   "E" gnus-summary-mark-as-expirable
1679   "\M-u" gnus-summary-clear-mark-forward
1680   "\M-U" gnus-summary-clear-mark-backward
1681   "k" gnus-summary-kill-same-subject-and-select
1682   "\C-k" gnus-summary-kill-same-subject
1683   "\M-\C-k" gnus-summary-kill-thread
1684   "\M-\C-l" gnus-summary-lower-thread
1685   "e" gnus-summary-edit-article
1686   "#" gnus-summary-mark-as-processable
1687   "\M-#" gnus-summary-unmark-as-processable
1688   "\M-\C-t" gnus-summary-toggle-threads
1689   "\M-\C-s" gnus-summary-show-thread
1690   "\M-\C-h" gnus-summary-hide-thread
1691   "\M-\C-f" gnus-summary-next-thread
1692   "\M-\C-b" gnus-summary-prev-thread
1693   [(meta down)] gnus-summary-next-thread
1694   [(meta up)] gnus-summary-prev-thread
1695   "\M-\C-u" gnus-summary-up-thread
1696   "\M-\C-d" gnus-summary-down-thread
1697   "&" gnus-summary-execute-command
1698   "c" gnus-summary-catchup-and-exit
1699   "\C-w" gnus-summary-mark-region-as-read
1700   "\C-t" gnus-summary-toggle-truncation
1701   "?" gnus-summary-mark-as-dormant
1702   "\C-c\M-\C-s" gnus-summary-limit-include-expunged
1703   "\C-c\C-s\C-n" gnus-summary-sort-by-number
1704   "\C-c\C-s\C-l" gnus-summary-sort-by-lines
1705   "\C-c\C-s\C-c" gnus-summary-sort-by-chars
1706   "\C-c\C-s\C-a" gnus-summary-sort-by-author
1707   "\C-c\C-s\C-s" gnus-summary-sort-by-subject
1708   "\C-c\C-s\C-d" gnus-summary-sort-by-date
1709   "\C-c\C-s\C-i" gnus-summary-sort-by-score
1710   "\C-c\C-s\C-o" gnus-summary-sort-by-original
1711   "\C-c\C-s\C-r" gnus-summary-sort-by-random
1712   "=" gnus-summary-expand-window
1713   "\C-x\C-s" gnus-summary-reselect-current-group
1714   "\M-g" gnus-summary-rescan-group
1715   "w" gnus-summary-stop-page-breaking
1716   "\C-c\C-r" gnus-summary-caesar-message
1717   "f" gnus-summary-followup
1718   "F" gnus-summary-followup-with-original
1719   "C" gnus-summary-cancel-article
1720   "r" gnus-summary-reply
1721   "R" gnus-summary-reply-with-original
1722   "\C-c\C-f" gnus-summary-mail-forward
1723   "o" gnus-summary-save-article
1724   "\C-o" gnus-summary-save-article-mail
1725   "|" gnus-summary-pipe-output
1726   "\M-k" gnus-summary-edit-local-kill
1727   "\M-K" gnus-summary-edit-global-kill
1728   ;; "V" gnus-version
1729   "\C-c\C-d" gnus-summary-describe-group
1730   "q" gnus-summary-exit
1731   "Q" gnus-summary-exit-no-update
1732   "\C-c\C-i" gnus-info-find-node
1733   gnus-mouse-2 gnus-mouse-pick-article
1734   [follow-link] mouse-face
1735   "m" gnus-summary-mail-other-window
1736   "a" gnus-summary-post-news
1737   "i" gnus-summary-news-other-window
1738   "x" gnus-summary-limit-to-unread
1739   "s" gnus-summary-isearch-article
1740   "t" gnus-summary-toggle-header
1741   "g" gnus-summary-show-article
1742   "l" gnus-summary-goto-last-article
1743   "\C-c\C-v\C-v" gnus-uu-decode-uu-view
1744   "\C-d" gnus-summary-enter-digest-group
1745   "\M-\C-d" gnus-summary-read-document
1746   "\M-\C-e" gnus-summary-edit-parameters
1747   "\M-\C-a" gnus-summary-customize-parameters
1748   "\C-c\C-b" gnus-bug
1749   "*" gnus-cache-enter-article
1750   "\M-*" gnus-cache-remove-article
1751   "\M-&" gnus-summary-universal-argument
1752   "\C-l" gnus-recenter
1753   "I" gnus-summary-increase-score
1754   "L" gnus-summary-lower-score
1755   "\M-i" gnus-symbolic-argument
1756   "h" gnus-summary-select-article-buffer
1757
1758   "b" gnus-article-view-part
1759   "\M-t" gnus-summary-toggle-display-buttonized
1760
1761   "V" gnus-summary-score-map
1762   "X" gnus-uu-extract-map
1763   "S" gnus-summary-send-map)
1764
1765 ;; Sort of orthogonal keymap
1766 (gnus-define-keys (gnus-summary-mark-map "M" gnus-summary-mode-map)
1767   "t" gnus-summary-tick-article-forward
1768   "!" gnus-summary-tick-article-forward
1769   "d" gnus-summary-mark-as-read-forward
1770   "r" gnus-summary-mark-as-read-forward
1771   "c" gnus-summary-clear-mark-forward
1772   " " gnus-summary-clear-mark-forward
1773   "e" gnus-summary-mark-as-expirable
1774   "x" gnus-summary-mark-as-expirable
1775   "?" gnus-summary-mark-as-dormant
1776   "b" gnus-summary-set-bookmark
1777   "B" gnus-summary-remove-bookmark
1778   "#" gnus-summary-mark-as-processable
1779   "\M-#" gnus-summary-unmark-as-processable
1780   "S" gnus-summary-limit-include-expunged
1781   "C" gnus-summary-catchup
1782   "H" gnus-summary-catchup-to-here
1783   "h" gnus-summary-catchup-from-here
1784   "\C-c" gnus-summary-catchup-all
1785   "k" gnus-summary-kill-same-subject-and-select
1786   "K" gnus-summary-kill-same-subject
1787   "P" gnus-uu-mark-map)
1788
1789 (gnus-define-keys (gnus-summary-mscore-map "V" gnus-summary-mark-map)
1790   "c" gnus-summary-clear-above
1791   "u" gnus-summary-tick-above
1792   "m" gnus-summary-mark-above
1793   "k" gnus-summary-kill-below)
1794
1795 (gnus-define-keys (gnus-summary-limit-map "/" gnus-summary-mode-map)
1796   "/" gnus-summary-limit-to-subject
1797   "n" gnus-summary-limit-to-articles
1798   "w" gnus-summary-pop-limit
1799   "s" gnus-summary-limit-to-subject
1800   "a" gnus-summary-limit-to-author
1801   "u" gnus-summary-limit-to-unread
1802   "m" gnus-summary-limit-to-marks
1803   "M" gnus-summary-limit-exclude-marks
1804   "v" gnus-summary-limit-to-score
1805   "*" gnus-summary-limit-include-cached
1806   "D" gnus-summary-limit-include-dormant
1807   "T" gnus-summary-limit-include-thread
1808   "d" gnus-summary-limit-exclude-dormant
1809   "t" gnus-summary-limit-to-age
1810   "." gnus-summary-limit-to-unseen
1811   "x" gnus-summary-limit-to-extra
1812   "p" gnus-summary-limit-to-display-predicate
1813   "E" gnus-summary-limit-include-expunged
1814   "c" gnus-summary-limit-exclude-childless-dormant
1815   "C" gnus-summary-limit-mark-excluded-as-read
1816   "o" gnus-summary-insert-old-articles
1817   "N" gnus-summary-insert-new-articles)
1818
1819 (gnus-define-keys (gnus-summary-goto-map "G" gnus-summary-mode-map)
1820   "n" gnus-summary-next-unread-article
1821   "p" gnus-summary-prev-unread-article
1822   "N" gnus-summary-next-article
1823   "P" gnus-summary-prev-article
1824   "\C-n" gnus-summary-next-same-subject
1825   "\C-p" gnus-summary-prev-same-subject
1826   "\M-n" gnus-summary-next-unread-subject
1827   "\M-p" gnus-summary-prev-unread-subject
1828   "f" gnus-summary-first-unread-article
1829   "b" gnus-summary-best-unread-article
1830   "j" gnus-summary-goto-article
1831   "g" gnus-summary-goto-subject
1832   "l" gnus-summary-goto-last-article
1833   "o" gnus-summary-pop-article)
1834
1835 (gnus-define-keys (gnus-summary-thread-map "T" gnus-summary-mode-map)
1836   "k" gnus-summary-kill-thread
1837   "l" gnus-summary-lower-thread
1838   "i" gnus-summary-raise-thread
1839   "T" gnus-summary-toggle-threads
1840   "t" gnus-summary-rethread-current
1841   "^" gnus-summary-reparent-thread
1842   "s" gnus-summary-show-thread
1843   "S" gnus-summary-show-all-threads
1844   "h" gnus-summary-hide-thread
1845   "H" gnus-summary-hide-all-threads
1846   "n" gnus-summary-next-thread
1847   "p" gnus-summary-prev-thread
1848   "u" gnus-summary-up-thread
1849   "o" gnus-summary-top-thread
1850   "d" gnus-summary-down-thread
1851   "#" gnus-uu-mark-thread
1852   "\M-#" gnus-uu-unmark-thread)
1853
1854 (gnus-define-keys (gnus-summary-buffer-map "Y" gnus-summary-mode-map)
1855   "g" gnus-summary-prepare
1856   "c" gnus-summary-insert-cached-articles
1857   "d" gnus-summary-insert-dormant-articles)
1858
1859 (gnus-define-keys (gnus-summary-exit-map "Z" gnus-summary-mode-map)
1860   "c" gnus-summary-catchup-and-exit
1861   "C" gnus-summary-catchup-all-and-exit
1862   "E" gnus-summary-exit-no-update
1863   "Q" gnus-summary-exit
1864   "Z" gnus-summary-exit
1865   "n" gnus-summary-catchup-and-goto-next-group
1866   "R" gnus-summary-reselect-current-group
1867   "G" gnus-summary-rescan-group
1868   "N" gnus-summary-next-group
1869   "s" gnus-summary-save-newsrc
1870   "P" gnus-summary-prev-group)
1871
1872 (gnus-define-keys (gnus-summary-article-map "A" gnus-summary-mode-map)
1873   " " gnus-summary-next-page
1874   "n" gnus-summary-next-page
1875   "\177" gnus-summary-prev-page
1876   [delete] gnus-summary-prev-page
1877   "p" gnus-summary-prev-page
1878   "\r" gnus-summary-scroll-up
1879   "\M-\r" gnus-summary-scroll-down
1880   "<" gnus-summary-beginning-of-article
1881   ">" gnus-summary-end-of-article
1882   "b" gnus-summary-beginning-of-article
1883   "e" gnus-summary-end-of-article
1884   "^" gnus-summary-refer-parent-article
1885   "r" gnus-summary-refer-parent-article
1886   "D" gnus-summary-enter-digest-group
1887   "R" gnus-summary-refer-references
1888   "T" gnus-summary-refer-thread
1889   "g" gnus-summary-show-article
1890   "s" gnus-summary-isearch-article
1891   "P" gnus-summary-print-article
1892   "M" gnus-mailing-list-insinuate
1893   "t" gnus-article-babel)
1894
1895 (gnus-define-keys (gnus-summary-wash-map "W" gnus-summary-mode-map)
1896   "b" gnus-article-add-buttons
1897   "B" gnus-article-add-buttons-to-head
1898   "o" gnus-article-treat-overstrike
1899   "e" gnus-article-emphasize
1900   "w" gnus-article-fill-cited-article
1901   "Q" gnus-article-fill-long-lines
1902   "C" gnus-article-capitalize-sentences
1903   "c" gnus-article-remove-cr
1904   "q" gnus-article-de-quoted-unreadable
1905   "6" gnus-article-de-base64-unreadable
1906   "Z" gnus-article-decode-HZ
1907   "h" gnus-article-wash-html
1908   "u" gnus-article-unsplit-urls
1909   "s" gnus-summary-force-verify-and-decrypt
1910   "f" gnus-article-display-x-face
1911   "l" gnus-summary-stop-page-breaking
1912   "r" gnus-summary-caesar-message
1913   "m" gnus-summary-morse-message
1914   "t" gnus-summary-toggle-header
1915   "g" gnus-treat-smiley
1916   "v" gnus-summary-verbose-headers
1917   "a" gnus-article-strip-headers-in-body ;; mnemonic: wash archive
1918   "p" gnus-article-verify-x-pgp-sig
1919   "d" gnus-article-treat-dumbquotes)
1920
1921 (gnus-define-keys (gnus-summary-wash-deuglify-map "Y" gnus-summary-wash-map)
1922   ;; mnemonic: deuglif*Y*
1923   "u" gnus-article-outlook-unwrap-lines
1924   "a" gnus-article-outlook-repair-attribution
1925   "c" gnus-article-outlook-rearrange-citation
1926   "f" gnus-article-outlook-deuglify-article) ;; mnemonic: full deuglify
1927
1928 (gnus-define-keys (gnus-summary-wash-hide-map "W" gnus-summary-wash-map)
1929   "a" gnus-article-hide
1930   "h" gnus-article-hide-headers
1931   "b" gnus-article-hide-boring-headers
1932   "s" gnus-article-hide-signature
1933   "c" gnus-article-hide-citation
1934   "C" gnus-article-hide-citation-in-followups
1935   "l" gnus-article-hide-list-identifiers
1936   "B" gnus-article-strip-banner
1937   "P" gnus-article-hide-pem
1938   "\C-c" gnus-article-hide-citation-maybe)
1939
1940 (gnus-define-keys (gnus-summary-wash-highlight-map "H" gnus-summary-wash-map)
1941   "a" gnus-article-highlight
1942   "h" gnus-article-highlight-headers
1943   "c" gnus-article-highlight-citation
1944   "s" gnus-article-highlight-signature)
1945
1946 (gnus-define-keys (gnus-summary-wash-header-map "G" gnus-summary-wash-map)
1947   "f" gnus-article-treat-fold-headers
1948   "u" gnus-article-treat-unfold-headers
1949   "n" gnus-article-treat-fold-newsgroups)
1950
1951 (gnus-define-keys (gnus-summary-wash-display-map "D" gnus-summary-wash-map)
1952   "x" gnus-article-display-x-face
1953   "d" gnus-article-display-face
1954   "s" gnus-treat-smiley
1955   "D" gnus-article-remove-images
1956   "f" gnus-treat-from-picon
1957   "m" gnus-treat-mail-picon
1958   "n" gnus-treat-newsgroups-picon)
1959
1960 (gnus-define-keys (gnus-summary-wash-mime-map "M" gnus-summary-wash-map)
1961   "w" gnus-article-decode-mime-words
1962   "c" gnus-article-decode-charset
1963   "v" gnus-mime-view-all-parts
1964   "b" gnus-article-view-part)
1965
1966 (gnus-define-keys (gnus-summary-wash-time-map "T" gnus-summary-wash-map)
1967   "z" gnus-article-date-ut
1968   "u" gnus-article-date-ut
1969   "l" gnus-article-date-local
1970   "p" gnus-article-date-english
1971   "e" gnus-article-date-lapsed
1972   "o" gnus-article-date-original
1973   "i" gnus-article-date-iso8601
1974   "s" gnus-article-date-user)
1975
1976 (gnus-define-keys (gnus-summary-wash-empty-map "E" gnus-summary-wash-map)
1977   "t" gnus-article-remove-trailing-blank-lines
1978   "l" gnus-article-strip-leading-blank-lines
1979   "m" gnus-article-strip-multiple-blank-lines
1980   "a" gnus-article-strip-blank-lines
1981   "A" gnus-article-strip-all-blank-lines
1982   "s" gnus-article-strip-leading-space
1983   "e" gnus-article-strip-trailing-space
1984   "w" gnus-article-remove-leading-whitespace)
1985
1986 (gnus-define-keys (gnus-summary-help-map "H" gnus-summary-mode-map)
1987   "v" gnus-version
1988   "f" gnus-summary-fetch-faq
1989   "d" gnus-summary-describe-group
1990   "h" gnus-summary-describe-briefly
1991   "i" gnus-info-find-node
1992   "c" gnus-group-fetch-charter
1993   "C" gnus-group-fetch-control)
1994
1995 (gnus-define-keys (gnus-summary-backend-map "B" gnus-summary-mode-map)
1996   "e" gnus-summary-expire-articles
1997   "\M-\C-e" gnus-summary-expire-articles-now
1998   "\177" gnus-summary-delete-article
1999   [delete] gnus-summary-delete-article
2000   [backspace] gnus-summary-delete-article
2001   "m" gnus-summary-move-article
2002   "r" gnus-summary-respool-article
2003   "w" gnus-summary-edit-article
2004   "c" gnus-summary-copy-article
2005   "B" gnus-summary-crosspost-article
2006   "q" gnus-summary-respool-query
2007   "t" gnus-summary-respool-trace
2008   "i" gnus-summary-import-article
2009   "I" gnus-summary-create-article
2010   "p" gnus-summary-article-posted-p)
2011
2012 (gnus-define-keys (gnus-summary-save-map "O" gnus-summary-mode-map)
2013   "o" gnus-summary-save-article
2014   "m" gnus-summary-save-article-mail
2015   "F" gnus-summary-write-article-file
2016   "r" gnus-summary-save-article-rmail
2017   "f" gnus-summary-save-article-file
2018   "b" gnus-summary-save-article-body-file
2019   "B" gnus-summary-write-article-body-file
2020   "h" gnus-summary-save-article-folder
2021   "v" gnus-summary-save-article-vm
2022   "p" gnus-summary-pipe-output
2023   "P" gnus-summary-muttprint
2024   "s" gnus-soup-add-article)
2025
2026 (gnus-define-keys (gnus-summary-mime-map "K" gnus-summary-mode-map)
2027   "b" gnus-summary-display-buttonized
2028   "m" gnus-summary-repair-multipart
2029   "v" gnus-article-view-part
2030   "o" gnus-article-save-part
2031   "c" gnus-article-copy-part
2032   "C" gnus-article-view-part-as-charset
2033   "e" gnus-article-view-part-externally
2034   "E" gnus-article-encrypt-body
2035   "i" gnus-article-inline-part
2036   "|" gnus-article-pipe-part)
2037
2038 (gnus-define-keys (gnus-uu-mark-map "P" gnus-summary-mark-map)
2039   "p" gnus-summary-mark-as-processable
2040   "u" gnus-summary-unmark-as-processable
2041   "U" gnus-summary-unmark-all-processable
2042   "v" gnus-uu-mark-over
2043   "s" gnus-uu-mark-series
2044   "r" gnus-uu-mark-region
2045   "g" gnus-uu-unmark-region
2046   "R" gnus-uu-mark-by-regexp
2047   "G" gnus-uu-unmark-by-regexp
2048   "t" gnus-uu-mark-thread
2049   "T" gnus-uu-unmark-thread
2050   "a" gnus-uu-mark-all
2051   "b" gnus-uu-mark-buffer
2052   "S" gnus-uu-mark-sparse
2053   "k" gnus-summary-kill-process-mark
2054   "y" gnus-summary-yank-process-mark
2055   "w" gnus-summary-save-process-mark
2056   "i" gnus-uu-invert-processable)
2057
2058 (gnus-define-keys (gnus-uu-extract-map "X" gnus-summary-mode-map)
2059   ;;"x" gnus-uu-extract-any
2060   "m" gnus-summary-save-parts
2061   "u" gnus-uu-decode-uu
2062   "U" gnus-uu-decode-uu-and-save
2063   "s" gnus-uu-decode-unshar
2064   "S" gnus-uu-decode-unshar-and-save
2065   "o" gnus-uu-decode-save
2066   "O" gnus-uu-decode-save
2067   "b" gnus-uu-decode-binhex
2068   "B" gnus-uu-decode-binhex
2069   "p" gnus-uu-decode-postscript
2070   "P" gnus-uu-decode-postscript-and-save)
2071
2072 (gnus-define-keys
2073     (gnus-uu-extract-view-map "v" gnus-uu-extract-map)
2074   "u" gnus-uu-decode-uu-view
2075   "U" gnus-uu-decode-uu-and-save-view
2076   "s" gnus-uu-decode-unshar-view
2077   "S" gnus-uu-decode-unshar-and-save-view
2078   "o" gnus-uu-decode-save-view
2079   "O" gnus-uu-decode-save-view
2080   "b" gnus-uu-decode-binhex-view
2081   "B" gnus-uu-decode-binhex-view
2082   "p" gnus-uu-decode-postscript-view
2083   "P" gnus-uu-decode-postscript-and-save-view)
2084
2085 (defvar gnus-article-post-menu nil)
2086
2087 (defconst gnus-summary-menu-maxlen 20)
2088
2089 (defun gnus-summary-menu-split (menu)
2090   ;; If we have lots of elements, divide them into groups of 20
2091   ;; and make a pane (or submenu) for each one.
2092   (if (> (length menu) (/ (* gnus-summary-menu-maxlen 3) 2))
2093       (let ((menu menu) sublists next
2094             (i 1))
2095         (while menu
2096           ;; Pull off the next gnus-summary-menu-maxlen elements
2097           ;; and make them the next element of sublist.
2098           (setq next (nthcdr gnus-summary-menu-maxlen menu))
2099           (if next
2100               (setcdr (nthcdr (1- gnus-summary-menu-maxlen) menu)
2101                       nil))
2102           (setq sublists (cons (cons (format "%s ... %s" (aref (car menu) 0)
2103                                              (aref (car (last menu)) 0)) menu)
2104                                sublists))
2105           (setq i (1+ i))
2106           (setq menu next))
2107         (nreverse sublists))
2108     ;; Few elements--put them all in one pane.
2109     menu))
2110
2111 (defun gnus-summary-make-menu-bar ()
2112   (gnus-turn-off-edit-menu 'summary)
2113
2114   (unless (boundp 'gnus-summary-misc-menu)
2115
2116     (easy-menu-define
2117       gnus-summary-kill-menu gnus-summary-mode-map ""
2118       (cons
2119        "Score"
2120        (nconc
2121         (list
2122          ["Customize" gnus-score-customize t])
2123         (gnus-make-score-map 'increase)
2124         (gnus-make-score-map 'lower)
2125         '(("Mark"
2126            ["Kill below" gnus-summary-kill-below t]
2127            ["Mark above" gnus-summary-mark-above t]
2128            ["Tick above" gnus-summary-tick-above t]
2129            ["Clear above" gnus-summary-clear-above t])
2130           ["Current score" gnus-summary-current-score t]
2131           ["Set score" gnus-summary-set-score t]
2132           ["Switch current score file..." gnus-score-change-score-file t]
2133           ["Set mark below..." gnus-score-set-mark-below t]
2134           ["Set expunge below..." gnus-score-set-expunge-below t]
2135           ["Edit current score file" gnus-score-edit-current-scores t]
2136           ["Edit score file" gnus-score-edit-file t]
2137           ["Trace score" gnus-score-find-trace t]
2138           ["Find words" gnus-score-find-favourite-words t]
2139           ["Rescore buffer" gnus-summary-rescore t]
2140           ["Increase score..." gnus-summary-increase-score t]
2141           ["Lower score..." gnus-summary-lower-score t]))))
2142
2143     ;; Define both the Article menu in the summary buffer and the
2144     ;; equivalent Commands menu in the article buffer here for
2145     ;; consistency.
2146     (let ((innards
2147            `(("Hide"
2148               ["All" gnus-article-hide t]
2149               ["Headers" gnus-article-hide-headers t]
2150               ["Signature" gnus-article-hide-signature t]
2151               ["Citation" gnus-article-hide-citation t]
2152               ["List identifiers" gnus-article-hide-list-identifiers t]
2153               ["Banner" gnus-article-strip-banner t]
2154               ["Boring headers" gnus-article-hide-boring-headers t])
2155              ("Highlight"
2156               ["All" gnus-article-highlight t]
2157               ["Headers" gnus-article-highlight-headers t]
2158               ["Signature" gnus-article-highlight-signature t]
2159               ["Citation" gnus-article-highlight-citation t])
2160              ("MIME"
2161               ["Words" gnus-article-decode-mime-words t]
2162               ["Charset" gnus-article-decode-charset t]
2163               ["QP" gnus-article-de-quoted-unreadable t]
2164               ["Base64" gnus-article-de-base64-unreadable t]
2165               ["View MIME buttons" gnus-summary-display-buttonized t]
2166               ["View all" gnus-mime-view-all-parts t]
2167               ["Verify and Decrypt" gnus-summary-force-verify-and-decrypt t]
2168               ["Encrypt body" gnus-article-encrypt-body
2169                :active (not (gnus-group-read-only-p))
2170                ,@(if (featurep 'xemacs) nil
2171                    '(:help "Encrypt the message body on disk"))]
2172               ["Extract all parts..." gnus-summary-save-parts t]
2173               ("Multipart"
2174                ["Repair multipart" gnus-summary-repair-multipart t]
2175                ["Pipe part..." gnus-article-pipe-part t]
2176                ["Inline part" gnus-article-inline-part t]
2177                ["Encrypt body" gnus-article-encrypt-body
2178                 :active (not (gnus-group-read-only-p))
2179                ,@(if (featurep 'xemacs) nil
2180                    '(:help "Encrypt the message body on disk"))]
2181                ["View part externally" gnus-article-view-part-externally t]
2182                ["View part with charset..." gnus-article-view-part-as-charset t]
2183                ["Copy part" gnus-article-copy-part t]
2184                ["Save part..." gnus-article-save-part t]
2185                ["View part" gnus-article-view-part t]))
2186              ("Date"
2187               ["Local" gnus-article-date-local t]
2188               ["ISO8601" gnus-article-date-iso8601 t]
2189               ["UT" gnus-article-date-ut t]
2190               ["Original" gnus-article-date-original t]
2191               ["Lapsed" gnus-article-date-lapsed t]
2192               ["User-defined" gnus-article-date-user t])
2193              ("Display"
2194               ["Remove images" gnus-article-remove-images t]
2195               ["Toggle smiley" gnus-treat-smiley t]
2196               ["Show X-Face" gnus-article-display-x-face t]
2197               ["Show picons in From" gnus-treat-from-picon t]
2198               ["Show picons in mail headers" gnus-treat-mail-picon t]
2199               ["Show picons in news headers" gnus-treat-newsgroups-picon t]
2200               ("View as different encoding"
2201                ,@(gnus-summary-menu-split
2202                   (mapcar
2203                    (lambda (cs)
2204                      ;; Since easymenu under Emacs doesn't allow
2205                      ;; lambda forms for menu commands, we should
2206                      ;; provide intern'ed function symbols.
2207                      (let ((command (intern (format "\
2208 gnus-summary-show-article-from-menu-as-charset-%s" cs))))
2209                        (fset command
2210                              `(lambda ()
2211                                 (interactive)
2212                                 (let ((gnus-summary-show-article-charset-alist
2213                                        '((1 . ,cs))))
2214                                   (gnus-summary-show-article 1))))
2215                        `[,(symbol-name cs) ,command t]))
2216                    (sort (if (fboundp 'coding-system-list)
2217                              (coding-system-list)
2218                            (mapcar 'car mm-mime-mule-charset-alist))
2219                          'string<)))))
2220              ("Washing"
2221               ("Remove Blanks"
2222                ["Leading" gnus-article-strip-leading-blank-lines t]
2223                ["Multiple" gnus-article-strip-multiple-blank-lines t]
2224                ["Trailing" gnus-article-remove-trailing-blank-lines t]
2225                ["All of the above" gnus-article-strip-blank-lines t]
2226                ["All" gnus-article-strip-all-blank-lines t]
2227                ["Leading space" gnus-article-strip-leading-space t]
2228                ["Trailing space" gnus-article-strip-trailing-space t]
2229                ["Leading space in headers"
2230                 gnus-article-remove-leading-whitespace t])
2231               ["Overstrike" gnus-article-treat-overstrike t]
2232               ["Dumb quotes" gnus-article-treat-dumbquotes t]
2233               ["Emphasis" gnus-article-emphasize t]
2234               ["Word wrap" gnus-article-fill-cited-article t]
2235               ["Fill long lines" gnus-article-fill-long-lines t]
2236               ["Capitalize sentences" gnus-article-capitalize-sentences t]
2237               ["Remove CR" gnus-article-remove-cr t]
2238               ["Quoted-Printable" gnus-article-de-quoted-unreadable t]
2239               ["Base64" gnus-article-de-base64-unreadable t]
2240               ["Rot 13" gnus-summary-caesar-message
2241                ,@(if (featurep 'xemacs) '(t)
2242                    '(:help "\"Caesar rotate\" article by 13"))]
2243               ["Morse decode" gnus-summary-morse-message t]
2244               ["Unix pipe..." gnus-summary-pipe-message t]
2245               ["Add buttons" gnus-article-add-buttons t]
2246               ["Add buttons to head" gnus-article-add-buttons-to-head t]
2247               ["Stop page breaking" gnus-summary-stop-page-breaking t]
2248               ["Verbose header" gnus-summary-verbose-headers t]
2249               ["Toggle header" gnus-summary-toggle-header t]
2250               ["Unfold headers" gnus-article-treat-unfold-headers t]
2251               ["Fold newsgroups" gnus-article-treat-fold-newsgroups t]
2252               ["Html" gnus-article-wash-html t]
2253               ["Unsplit URLs" gnus-article-unsplit-urls t]
2254               ["Verify X-PGP-Sig" gnus-article-verify-x-pgp-sig t]
2255               ["Decode HZ" gnus-article-decode-HZ t]
2256               ("(Outlook) Deuglify"
2257                ["Unwrap lines" gnus-article-outlook-unwrap-lines t]
2258                ["Repair attribution" gnus-article-outlook-repair-attribution t]
2259                ["Rearrange citation" gnus-article-outlook-rearrange-citation t]
2260                ["Full (Outlook) deuglify"
2261                 gnus-article-outlook-deuglify-article t])
2262               )
2263              ("Output"
2264               ["Save in default format..." gnus-summary-save-article
2265                ,@(if (featurep 'xemacs) '(t)
2266                    '(:help "Save article using default method"))]
2267               ["Save in file..." gnus-summary-save-article-file
2268                ,@(if (featurep 'xemacs) '(t)
2269                    '(:help "Save article in file"))]
2270               ["Save in Unix mail format..." gnus-summary-save-article-mail t]
2271               ["Save in MH folder..." gnus-summary-save-article-folder t]
2272               ["Save in VM folder..." gnus-summary-save-article-vm t]
2273               ["Save in RMAIL mbox..." gnus-summary-save-article-rmail t]
2274               ["Save body in file..." gnus-summary-save-article-body-file t]
2275               ["Pipe through a filter..." gnus-summary-pipe-output t]
2276               ["Add to SOUP packet" gnus-soup-add-article t]
2277               ["Print with Muttprint..." gnus-summary-muttprint t]
2278               ["Print" gnus-summary-print-article
2279                ,@(if (featurep 'xemacs) '(t)
2280                    '(:help "Generate and print a PostScript image"))])
2281              ("Copy, move,... (Backend)"
2282               ,@(if (featurep 'xemacs) nil
2283                   '(:help "Copying, moving, expiring articles..."))
2284               ["Respool article..." gnus-summary-respool-article t]
2285               ["Move article..." gnus-summary-move-article
2286                (gnus-check-backend-function
2287                 'request-move-article gnus-newsgroup-name)]
2288               ["Copy article..." gnus-summary-copy-article t]
2289               ["Crosspost article..." gnus-summary-crosspost-article
2290                (gnus-check-backend-function
2291                 'request-replace-article gnus-newsgroup-name)]
2292               ["Import file..." gnus-summary-import-article
2293                (gnus-check-backend-function
2294                 'request-accept-article gnus-newsgroup-name)]
2295               ["Create article..." gnus-summary-create-article
2296                (gnus-check-backend-function
2297                 'request-accept-article gnus-newsgroup-name)]
2298               ["Check if posted" gnus-summary-article-posted-p t]
2299               ["Edit article" gnus-summary-edit-article
2300                (not (gnus-group-read-only-p))]
2301               ["Delete article" gnus-summary-delete-article
2302                (gnus-check-backend-function
2303                 'request-expire-articles gnus-newsgroup-name)]
2304               ["Query respool" gnus-summary-respool-query t]
2305               ["Trace respool" gnus-summary-respool-trace t]
2306               ["Delete expirable articles" gnus-summary-expire-articles-now
2307                (gnus-check-backend-function
2308                 'request-expire-articles gnus-newsgroup-name)])
2309              ("Extract"
2310               ["Uudecode" gnus-uu-decode-uu
2311                ,@(if (featurep 'xemacs) '(t)
2312                    '(:help "Decode uuencoded article(s)"))]
2313               ["Uudecode and save" gnus-uu-decode-uu-and-save t]
2314               ["Unshar" gnus-uu-decode-unshar t]
2315               ["Unshar and save" gnus-uu-decode-unshar-and-save t]
2316               ["Save" gnus-uu-decode-save t]
2317               ["Binhex" gnus-uu-decode-binhex t]
2318               ["Postscript" gnus-uu-decode-postscript t]
2319               ["All MIME parts" gnus-summary-save-parts t])
2320              ("Cache"
2321               ["Enter article" gnus-cache-enter-article t]
2322               ["Remove article" gnus-cache-remove-article t])
2323              ["Translate" gnus-article-babel t]
2324              ["Select article buffer" gnus-summary-select-article-buffer t]
2325              ["Enter digest buffer" gnus-summary-enter-digest-group t]
2326              ["Isearch article..." gnus-summary-isearch-article t]
2327              ["Beginning of the article" gnus-summary-beginning-of-article t]
2328              ["End of the article" gnus-summary-end-of-article t]
2329              ["Fetch parent of article" gnus-summary-refer-parent-article t]
2330              ["Fetch referenced articles" gnus-summary-refer-references t]
2331              ["Fetch current thread" gnus-summary-refer-thread t]
2332              ["Fetch article with id..." gnus-summary-refer-article t]
2333              ["Setup Mailing List Params" gnus-mailing-list-insinuate t]
2334              ["Redisplay" gnus-summary-show-article t]
2335              ["Raw article" gnus-summary-show-raw-article :keys "C-u g"])))
2336       (easy-menu-define
2337         gnus-summary-article-menu gnus-summary-mode-map ""
2338         (cons "Article" innards))
2339
2340       (if (not (keymapp gnus-summary-article-menu))
2341           (easy-menu-define
2342             gnus-article-commands-menu gnus-article-mode-map ""
2343             (cons "Commands" innards))
2344         ;; in Emacs, don't share menu.
2345         (setq gnus-article-commands-menu
2346               (copy-keymap gnus-summary-article-menu))
2347         (define-key gnus-article-mode-map [menu-bar commands]
2348           (cons "Commands" gnus-article-commands-menu))))
2349
2350     (easy-menu-define
2351       gnus-summary-thread-menu gnus-summary-mode-map ""
2352       '("Threads"
2353         ["Find all messages in thread" gnus-summary-refer-thread t]
2354         ["Toggle threading" gnus-summary-toggle-threads t]
2355         ["Hide threads" gnus-summary-hide-all-threads t]
2356         ["Show threads" gnus-summary-show-all-threads t]
2357         ["Hide thread" gnus-summary-hide-thread t]
2358         ["Show thread" gnus-summary-show-thread t]
2359         ["Go to next thread" gnus-summary-next-thread t]
2360         ["Go to previous thread" gnus-summary-prev-thread t]
2361         ["Go down thread" gnus-summary-down-thread t]
2362         ["Go up thread" gnus-summary-up-thread t]
2363         ["Top of thread" gnus-summary-top-thread t]
2364         ["Mark thread as read" gnus-summary-kill-thread t]
2365         ["Lower thread score" gnus-summary-lower-thread t]
2366         ["Raise thread score" gnus-summary-raise-thread t]
2367         ["Rethread current" gnus-summary-rethread-current t]))
2368
2369     (easy-menu-define
2370       gnus-summary-post-menu gnus-summary-mode-map ""
2371       `("Post"
2372         ["Send a message (mail or news)" gnus-summary-post-news
2373          ,@(if (featurep 'xemacs) '(t)
2374              '(:help "Compose a new message (mail or news)"))]
2375         ["Followup" gnus-summary-followup
2376          ,@(if (featurep 'xemacs) '(t)
2377              '(:help "Post followup to this article"))]
2378         ["Followup and yank" gnus-summary-followup-with-original
2379          ,@(if (featurep 'xemacs) '(t)
2380              '(:help "Post followup to this article, quoting its contents"))]
2381         ["Supersede article" gnus-summary-supersede-article t]
2382         ["Cancel article" gnus-summary-cancel-article
2383          ,@(if (featurep 'xemacs) '(t)
2384              '(:help "Cancel an article you posted"))]
2385         ["Reply" gnus-summary-reply t]
2386         ["Reply and yank" gnus-summary-reply-with-original t]
2387         ["Wide reply" gnus-summary-wide-reply t]
2388         ["Wide reply and yank" gnus-summary-wide-reply-with-original
2389          ,@(if (featurep 'xemacs) '(t)
2390              '(:help "Mail a reply, quoting this article"))]
2391         ["Very wide reply" gnus-summary-very-wide-reply t]
2392         ["Very wide reply and yank" gnus-summary-very-wide-reply-with-original
2393          ,@(if (featurep 'xemacs) '(t)
2394              '(:help "Mail a very wide reply, quoting this article"))]
2395         ["Mail forward" gnus-summary-mail-forward t]
2396         ["Post forward" gnus-summary-post-forward t]
2397         ["Digest and mail" gnus-uu-digest-mail-forward t]
2398         ["Digest and post" gnus-uu-digest-post-forward t]
2399         ["Resend message" gnus-summary-resend-message t]
2400         ["Resend message edit" gnus-summary-resend-message-edit t]
2401         ["Send bounced mail" gnus-summary-resend-bounced-mail t]
2402         ["Send a mail" gnus-summary-mail-other-window t]
2403         ["Create a local message" gnus-summary-news-other-window t]
2404         ["Uuencode and post" gnus-uu-post-news
2405          ,@(if (featurep 'xemacs) '(t)
2406              '(:help "Post a uuencoded article"))]
2407         ["Followup via news" gnus-summary-followup-to-mail t]
2408         ["Followup via news and yank"
2409          gnus-summary-followup-to-mail-with-original t]
2410         ;;("Draft"
2411         ;;["Send" gnus-summary-send-draft t]
2412         ;;["Send bounced" gnus-resend-bounced-mail t])
2413         ))
2414
2415     (cond
2416      ((not (keymapp gnus-summary-post-menu))
2417       (setq gnus-article-post-menu gnus-summary-post-menu))
2418      ((not gnus-article-post-menu)
2419       ;; Don't share post menu.
2420       (setq gnus-article-post-menu
2421             (copy-keymap gnus-summary-post-menu))))
2422     (define-key gnus-article-mode-map [menu-bar post]
2423       (cons "Post" gnus-article-post-menu))
2424
2425     (easy-menu-define
2426       gnus-summary-misc-menu gnus-summary-mode-map ""
2427       `("Gnus"
2428         ("Mark Read"
2429          ["Mark as read" gnus-summary-mark-as-read-forward t]
2430          ["Mark same subject and select"
2431           gnus-summary-kill-same-subject-and-select t]
2432          ["Mark same subject" gnus-summary-kill-same-subject t]
2433          ["Catchup" gnus-summary-catchup
2434           ,@(if (featurep 'xemacs) '(t)
2435               '(:help "Mark unread articles in this group as read"))]
2436          ["Catchup all" gnus-summary-catchup-all t]
2437          ["Catchup to here" gnus-summary-catchup-to-here t]
2438          ["Catchup from here" gnus-summary-catchup-from-here t]
2439          ["Catchup region" gnus-summary-mark-region-as-read
2440           (gnus-mark-active-p)]
2441          ["Mark excluded" gnus-summary-limit-mark-excluded-as-read t])
2442         ("Mark Various"
2443          ["Tick" gnus-summary-tick-article-forward t]
2444          ["Mark as dormant" gnus-summary-mark-as-dormant t]
2445          ["Remove marks" gnus-summary-clear-mark-forward t]
2446          ["Set expirable mark" gnus-summary-mark-as-expirable t]
2447          ["Set bookmark" gnus-summary-set-bookmark t]
2448          ["Remove bookmark" gnus-summary-remove-bookmark t])
2449         ("Limit to"
2450          ["Marks..." gnus-summary-limit-to-marks t]
2451          ["Subject..." gnus-summary-limit-to-subject t]
2452          ["Author..." gnus-summary-limit-to-author t]
2453          ["Age..." gnus-summary-limit-to-age t]
2454          ["Extra..." gnus-summary-limit-to-extra t]
2455          ["Score..." gnus-summary-limit-to-score t]
2456          ["Display Predicate" gnus-summary-limit-to-display-predicate t]
2457          ["Unread" gnus-summary-limit-to-unread t]
2458          ["Unseen" gnus-summary-limit-to-unseen t]
2459          ["Non-dormant" gnus-summary-limit-exclude-dormant t]
2460          ["Next or process marked articles" gnus-summary-limit-to-articles t]
2461          ["Pop limit" gnus-summary-pop-limit t]
2462          ["Show dormant" gnus-summary-limit-include-dormant t]
2463          ["Hide childless dormant"
2464           gnus-summary-limit-exclude-childless-dormant t]
2465          ;;["Hide thread" gnus-summary-limit-exclude-thread t]
2466          ["Hide marked" gnus-summary-limit-exclude-marks t]
2467          ["Show expunged" gnus-summary-limit-include-expunged t])
2468         ("Process Mark"
2469          ["Set mark" gnus-summary-mark-as-processable t]
2470          ["Remove mark" gnus-summary-unmark-as-processable t]
2471          ["Remove all marks" gnus-summary-unmark-all-processable t]
2472          ["Mark above" gnus-uu-mark-over t]
2473          ["Mark series" gnus-uu-mark-series t]
2474          ["Mark region" gnus-uu-mark-region (gnus-mark-active-p)]
2475          ["Unmark region" gnus-uu-unmark-region (gnus-mark-active-p)]
2476          ["Mark by regexp..." gnus-uu-mark-by-regexp t]
2477          ["Unmark by regexp..." gnus-uu-unmark-by-regexp t]
2478          ["Mark all" gnus-uu-mark-all t]
2479          ["Mark buffer" gnus-uu-mark-buffer t]
2480          ["Mark sparse" gnus-uu-mark-sparse t]
2481          ["Mark thread" gnus-uu-mark-thread t]
2482          ["Unmark thread" gnus-uu-unmark-thread t]
2483          ("Process Mark Sets"
2484           ["Kill" gnus-summary-kill-process-mark t]
2485           ["Yank" gnus-summary-yank-process-mark
2486            gnus-newsgroup-process-stack]
2487           ["Save" gnus-summary-save-process-mark t]
2488           ["Run command on marked..." gnus-summary-universal-argument t]))
2489         ("Scroll article"
2490          ["Page forward" gnus-summary-next-page
2491           ,@(if (featurep 'xemacs) '(t)
2492               '(:help "Show next page of article"))]
2493          ["Page backward" gnus-summary-prev-page
2494           ,@(if (featurep 'xemacs) '(t)
2495               '(:help "Show previous page of article"))]
2496          ["Line forward" gnus-summary-scroll-up t])
2497         ("Move"
2498          ["Next unread article" gnus-summary-next-unread-article t]
2499          ["Previous unread article" gnus-summary-prev-unread-article t]
2500          ["Next article" gnus-summary-next-article t]
2501          ["Previous article" gnus-summary-prev-article t]
2502          ["Next unread subject" gnus-summary-next-unread-subject t]
2503          ["Previous unread subject" gnus-summary-prev-unread-subject t]
2504          ["Next article same subject" gnus-summary-next-same-subject t]
2505          ["Previous article same subject" gnus-summary-prev-same-subject t]
2506          ["First unread article" gnus-summary-first-unread-article t]
2507          ["Best unread article" gnus-summary-best-unread-article t]
2508          ["Go to subject number..." gnus-summary-goto-subject t]
2509          ["Go to article number..." gnus-summary-goto-article t]
2510          ["Go to the last article" gnus-summary-goto-last-article t]
2511          ["Pop article off history" gnus-summary-pop-article t])
2512         ("Sort"
2513          ["Sort by number" gnus-summary-sort-by-number t]
2514          ["Sort by author" gnus-summary-sort-by-author t]
2515          ["Sort by subject" gnus-summary-sort-by-subject t]
2516          ["Sort by date" gnus-summary-sort-by-date t]
2517          ["Sort by score" gnus-summary-sort-by-score t]
2518          ["Sort by lines" gnus-summary-sort-by-lines t]
2519          ["Sort by characters" gnus-summary-sort-by-chars t]
2520          ["Randomize" gnus-summary-sort-by-random t]
2521          ["Original sort" gnus-summary-sort-by-original t])
2522         ("Help"
2523          ["Fetch group FAQ" gnus-summary-fetch-faq t]
2524          ["Describe group" gnus-summary-describe-group t]
2525          ["Fetch charter" gnus-group-fetch-charter
2526           ,@(if (featurep 'xemacs) nil
2527               '(:help "Display the charter of the current group"))]
2528          ["Fetch control message" gnus-group-fetch-control
2529           ,@(if (featurep 'xemacs) nil
2530               '(:help "Display the archived control message for the current group"))]
2531          ["Read manual" gnus-info-find-node t])
2532         ("Modes"
2533          ["Pick and read" gnus-pick-mode t]
2534          ["Binary" gnus-binary-mode t])
2535         ("Regeneration"
2536          ["Regenerate" gnus-summary-prepare t]
2537          ["Insert cached articles" gnus-summary-insert-cached-articles t]
2538          ["Insert dormant articles" gnus-summary-insert-dormant-articles t]
2539          ["Toggle threading" gnus-summary-toggle-threads t])
2540         ["See old articles" gnus-summary-insert-old-articles t]
2541         ["See new articles" gnus-summary-insert-new-articles t]
2542         ["Filter articles..." gnus-summary-execute-command t]
2543         ["Run command on articles..." gnus-summary-universal-argument t]
2544         ["Search articles forward..." gnus-summary-search-article-forward t]
2545         ["Search articles backward..." gnus-summary-search-article-backward t]
2546         ["Toggle line truncation" gnus-summary-toggle-truncation t]
2547         ["Expand window" gnus-summary-expand-window t]
2548         ["Expire expirable articles" gnus-summary-expire-articles
2549          (gnus-check-backend-function
2550           'request-expire-articles gnus-newsgroup-name)]
2551         ["Edit local kill file" gnus-summary-edit-local-kill t]
2552         ["Edit main kill file" gnus-summary-edit-global-kill t]
2553         ["Edit group parameters" gnus-summary-edit-parameters t]
2554         ["Customize group parameters" gnus-summary-customize-parameters t]
2555         ["Send a bug report" gnus-bug t]
2556         ("Exit"
2557          ["Catchup and exit" gnus-summary-catchup-and-exit
2558           ,@(if (featurep 'xemacs) '(t)
2559               '(:help "Mark unread articles in this group as read, then exit"))]
2560          ["Catchup all and exit" gnus-summary-catchup-all-and-exit t]
2561          ["Catchup and goto next" gnus-summary-catchup-and-goto-next-group t]
2562          ["Exit group" gnus-summary-exit
2563           ,@(if (featurep 'xemacs) '(t)
2564               '(:help "Exit current group, return to group selection mode"))]
2565          ["Exit group without updating" gnus-summary-exit-no-update t]
2566          ["Exit and goto next group" gnus-summary-next-group t]
2567          ["Exit and goto prev group" gnus-summary-prev-group t]
2568          ["Reselect group" gnus-summary-reselect-current-group t]
2569          ["Rescan group" gnus-summary-rescan-group t]
2570          ["Update dribble" gnus-summary-save-newsrc t])))
2571
2572     (gnus-run-hooks 'gnus-summary-menu-hook)))
2573
2574 (defvar gnus-summary-tool-bar-map nil)
2575
2576 ;; Note: The :set function in the `gnus-summary-tool-bar*' variables will only
2577 ;; affect _new_ message buffers.  We might add a function that walks thru all
2578 ;; summary-mode buffers and force the update.
2579 (defun gnus-summary-tool-bar-update (&optional symbol value)
2580   "Update summary mode toolbar.
2581 Setter function for custom variables."
2582   (setq-default gnus-summary-tool-bar-map nil)
2583   (when symbol
2584     ;; When used as ":set" function:
2585     (set-default symbol value))
2586   (when (gnus-buffer-live-p gnus-summary-buffer)
2587     (with-current-buffer gnus-summary-buffer
2588       (gnus-summary-make-tool-bar))))
2589
2590 (defcustom gnus-summary-tool-bar (if (eq gmm-tool-bar-style 'gnome)
2591                                      'gnus-summary-tool-bar-gnome
2592                                    'gnus-summary-tool-bar-retro)
2593   "Specifies the Gnus summary tool bar.
2594
2595 It can be either a list or a symbol refering to a list.  See
2596 `gmm-tool-bar-from-list' for the format of the list.  The
2597 default key map is `gnus-summary-mode-map'.
2598
2599 Pre-defined symbols include `gnus-summary-tool-bar-gnome' and
2600 `gnus-summary-tool-bar-retro'."
2601   :type '(choice (const :tag "GNOME style" gnus-summary-tool-bar-gnome)
2602                  (const :tag "Retro look"  gnus-summary-tool-bar-retro)
2603                  (repeat :tag "User defined list" gmm-tool-bar-item)
2604                  (symbol))
2605   :version "22.1" ;; Gnus 5.10.9
2606   :initialize 'custom-initialize-default
2607   :set 'gnus-summary-tool-bar-update
2608   :group 'gnus-summary)
2609
2610 (defcustom gnus-summary-tool-bar-gnome
2611   '((gnus-summary-post-news "mail/compose" nil)
2612     (gnus-summary-insert-new-articles "mail/inbox" nil
2613                                       :visible (or (not gnus-agent)
2614                                                    gnus-plugged))
2615     (gnus-summary-reply-with-original "mail/reply")
2616     (gnus-summary-reply "mail/reply" nil :visible nil)
2617     (gnus-summary-followup-with-original "mail/reply-all")
2618     (gnus-summary-followup "mail/reply-all" nil :visible nil)
2619     (gnus-summary-mail-forward "mail/forward")
2620     (gnus-summary-save-article "mail/save")
2621     (gnus-summary-search-article-forward "search" nil :visible nil)
2622     (gnus-summary-print-article "print")
2623     (gnus-summary-tick-article-forward "flag-followup" nil :visible nil)
2624     ;; Some new commands that may need more suitable icons:
2625     (gnus-summary-save-newsrc "save" nil :visible nil)
2626     ;; (gnus-summary-show-article "stock_message-display" nil :visible nil)
2627     (gnus-summary-prev-article "left-arrow")
2628     (gnus-summary-next-article "right-arrow")
2629     (gnus-summary-next-page "next-page")
2630     ;; (gnus-summary-enter-digest-group "right_arrow" nil :visible nil)
2631     ;;
2632     ;; Maybe some sort-by-... could be added:
2633     ;; (gnus-summary-sort-by-author "sort-a-z" nil :visible nil)
2634     ;; (gnus-summary-sort-by-date "sort-1-9" nil :visible nil)
2635     (gnus-summary-mark-as-expirable
2636      "delete" nil
2637      :visible (gnus-check-backend-function 'request-expire-articles
2638                                            gnus-newsgroup-name))
2639     (gnus-summary-mark-as-spam
2640      "mail/spam" t
2641      :visible (and (fboundp 'spam-group-ham-contents-p)
2642                    (spam-group-ham-contents-p gnus-newsgroup-name))
2643      :help "Mark as spam")
2644     (gnus-summary-mark-as-read-forward
2645      "mail/not-spam" nil
2646      :visible (and (fboundp 'spam-group-spam-contents-p)
2647                    (spam-group-spam-contents-p gnus-newsgroup-name)))
2648     ;;
2649     (gnus-summary-exit "exit")
2650     (gmm-customize-mode "preferences" t :help "Edit mode preferences")
2651     (gnus-info-find-node "help"))
2652   "List of functions for the summary tool bar (GNOME style).
2653
2654 See `gmm-tool-bar-from-list' for the format of the list."
2655   :type '(repeat gmm-tool-bar-item)
2656   :version "22.1" ;; Gnus 5.10.9
2657   :initialize 'custom-initialize-default
2658   :set 'gnus-summary-tool-bar-update
2659   :group 'gnus-summary)
2660
2661 (defcustom gnus-summary-tool-bar-retro
2662   '((gnus-summary-prev-unread-article "gnus/prev-ur")
2663     (gnus-summary-next-unread-article "gnus/next-ur")
2664     (gnus-summary-post-news "gnus/post")
2665     (gnus-summary-followup-with-original "gnus/fuwo")
2666     (gnus-summary-followup "gnus/followup")
2667     (gnus-summary-reply-with-original "gnus/reply-wo")
2668     (gnus-summary-reply "gnus/reply")
2669     (gnus-summary-caesar-message "gnus/rot13")
2670     (gnus-uu-decode-uu "gnus/uu-decode")
2671     (gnus-summary-save-article-file "gnus/save-aif")
2672     (gnus-summary-save-article "gnus/save-art")
2673     (gnus-uu-post-news "gnus/uu-post")
2674     (gnus-summary-catchup "gnus/catchup")
2675     (gnus-summary-catchup-and-exit "gnus/cu-exit")
2676     (gnus-summary-exit "gnus/exit-summ")
2677     ;; Some new command that may need more suitable icons:
2678     (gnus-summary-print-article "gnus/print" nil :visible nil)
2679     (gnus-summary-mark-as-expirable "gnus/close" nil :visible nil)
2680     (gnus-summary-save-newsrc "gnus/save" nil :visible nil)
2681     ;; (gnus-summary-enter-digest-group "gnus/right_arrow" nil :visible nil)
2682     (gnus-summary-search-article-forward "gnus/search" nil :visible nil)
2683     ;; (gnus-summary-insert-new-articles "gnus/paste" nil :visible nil)
2684     ;; (gnus-summary-toggle-threads "gnus/open" nil :visible nil)
2685     ;;
2686     (gnus-info-find-node "gnus/help" nil :visible nil))
2687   "List of functions for the summary tool bar (retro look).
2688
2689 See `gmm-tool-bar-from-list' for the format of the list."
2690   :type '(repeat gmm-tool-bar-item)
2691   :version "22.1" ;; Gnus 5.10.9
2692   :initialize 'custom-initialize-default
2693   :set 'gnus-summary-tool-bar-update
2694   :group 'gnus-summary)
2695
2696 (defcustom gnus-summary-tool-bar-zap-list t
2697   "List of icon items from the global tool bar.
2698 These items are not displayed in the Gnus summary mode tool bar.
2699
2700 See `gmm-tool-bar-from-list' for the format of the list."
2701   :type 'gmm-tool-bar-zap-list
2702   :version "22.1" ;; Gnus 5.10.9
2703   :initialize 'custom-initialize-default
2704   :set 'gnus-summary-tool-bar-update
2705   :group 'gnus-summary)
2706
2707 (defvar image-load-path)
2708
2709 (defun gnus-summary-make-tool-bar (&optional force)
2710   "Make a summary mode tool bar from `gnus-summary-tool-bar'.
2711 When FORCE, rebuild the tool bar."
2712   (when (and (not (featurep 'xemacs))
2713              (boundp 'tool-bar-mode)
2714              tool-bar-mode
2715              (or (not gnus-summary-tool-bar-map) force))
2716     (let* ((load-path
2717             (gmm-image-load-path-for-library "gnus"
2718                                              "mail/save.xpm"
2719                                              nil t))
2720            (image-load-path (cons (car load-path)
2721                                   (when (boundp 'image-load-path)
2722                                     image-load-path)))
2723            (map (gmm-tool-bar-from-list gnus-summary-tool-bar
2724                                         gnus-summary-tool-bar-zap-list
2725                                         'gnus-summary-mode-map)))
2726       (when map
2727         ;; Need to set `gnus-summary-tool-bar-map' because `gnus-article-mode'
2728         ;; uses it's value.
2729         (setq gnus-summary-tool-bar-map map))))
2730   (set (make-local-variable 'tool-bar-map) gnus-summary-tool-bar-map))
2731
2732 (defun gnus-score-set-default (var value)
2733   "A version of set that updates the GNU Emacs menu-bar."
2734   (set var value)
2735   ;; It is the message that forces the active status to be updated.
2736   (message ""))
2737
2738 (defun gnus-make-score-map (type)
2739   "Make a summary score map of type TYPE."
2740   (if t
2741       nil
2742     (let ((headers '(("author" "from" string)
2743                      ("subject" "subject" string)
2744                      ("article body" "body" string)
2745                      ("article head" "head" string)
2746                      ("xref" "xref" string)
2747                      ("extra header" "extra" string)
2748                      ("lines" "lines" number)
2749                      ("followups to author" "followup" string)))
2750           (types '((number ("less than" <)
2751                            ("greater than" >)
2752                            ("equal" =))
2753                    (string ("substring" s)
2754                            ("exact string" e)
2755                            ("fuzzy string" f)
2756                            ("regexp" r))))
2757           (perms '(("temporary" (current-time-string))
2758                    ("permanent" nil)
2759                    ("immediate" now)))
2760           header)
2761       (list
2762        (apply
2763         'nconc
2764         (list
2765          (if (eq type 'lower)
2766              "Lower score"
2767            "Increase score"))
2768         (let (outh)
2769           (while headers
2770             (setq header (car headers))
2771             (setq outh
2772                   (cons
2773                    (apply
2774                     'nconc
2775                     (list (car header))
2776                     (let ((ts (cdr (assoc (nth 2 header) types)))
2777                           outt)
2778                       (while ts
2779                         (setq outt
2780                               (cons
2781                                (apply
2782                                 'nconc
2783                                 (list (caar ts))
2784                                 (let ((ps perms)
2785                                       outp)
2786                                   (while ps
2787                                     (setq outp
2788                                           (cons
2789                                            (vector
2790                                             (caar ps)
2791                                             (list
2792                                              'gnus-summary-score-entry
2793                                              (nth 1 header)
2794                                              (if (or (string= (nth 1 header)
2795                                                               "head")
2796                                                      (string= (nth 1 header)
2797                                                               "body"))
2798                                                  ""
2799                                                (list 'gnus-summary-header
2800                                                      (nth 1 header)))
2801                                              (list 'quote (nth 1 (car ts)))
2802                                              (list 'gnus-score-delta-default
2803                                                    nil)
2804                                              (nth 1 (car ps))
2805                                              t)
2806                                             t)
2807                                            outp))
2808                                     (setq ps (cdr ps)))
2809                                   (list (nreverse outp))))
2810                                outt))
2811                         (setq ts (cdr ts)))
2812                       (list (nreverse outt))))
2813                    outh))
2814             (setq headers (cdr headers)))
2815           (list (nreverse outh))))))))
2816
2817 \f
2818
2819 (defun gnus-summary-mode (&optional group)
2820   "Major mode for reading articles.
2821
2822 All normal editing commands are switched off.
2823 \\<gnus-summary-mode-map>
2824 Each line in this buffer represents one article.  To read an
2825 article, you can, for instance, type `\\[gnus-summary-next-page]'.  To move forwards
2826 and backwards while displaying articles, type `\\[gnus-summary-next-unread-article]' and `\\[gnus-summary-prev-unread-article]',
2827 respectively.
2828
2829 You can also post articles and send mail from this buffer.  To
2830 follow up an article, type `\\[gnus-summary-followup]'.  To mail a reply to the author
2831 of an article, type `\\[gnus-summary-reply]'.
2832
2833 There are approx. one gazillion commands you can execute in this
2834 buffer; read the info pages for more information (`\\[gnus-info-find-node]').
2835
2836 The following commands are available:
2837
2838 \\{gnus-summary-mode-map}"
2839   (interactive)
2840   (kill-all-local-variables)
2841   (when (gnus-visual-p 'summary-menu 'menu)
2842     (gnus-summary-make-menu-bar)
2843     (gnus-summary-make-tool-bar))
2844   (gnus-summary-make-local-variables)
2845   (let ((gnus-summary-local-variables gnus-newsgroup-variables))
2846     (gnus-summary-make-local-variables))
2847   (gnus-make-thread-indent-array)
2848   (gnus-simplify-mode-line)
2849   (setq major-mode 'gnus-summary-mode)
2850   (setq mode-name "Summary")
2851   (make-local-variable 'minor-mode-alist)
2852   (use-local-map gnus-summary-mode-map)
2853   (buffer-disable-undo)
2854   (setq buffer-read-only t)             ;Disable modification
2855   (setq truncate-lines t)
2856   (setq selective-display t)
2857   (setq selective-display-ellipses t)   ;Display `...'
2858   (gnus-summary-set-display-table)
2859   (gnus-set-default-directory)
2860   (setq gnus-newsgroup-name group)
2861   (make-local-variable 'gnus-summary-line-format)
2862   (make-local-variable 'gnus-summary-line-format-spec)
2863   (make-local-variable 'gnus-summary-dummy-line-format)
2864   (make-local-variable 'gnus-summary-dummy-line-format-spec)
2865   (make-local-variable 'gnus-summary-mark-positions)
2866   (gnus-make-local-hook 'pre-command-hook)
2867   (add-hook 'pre-command-hook 'gnus-set-global-variables nil t)
2868   (gnus-run-mode-hooks 'gnus-summary-mode-hook)
2869   (turn-on-gnus-mailing-list-mode)
2870   (mm-enable-multibyte)
2871   (gnus-update-format-specifications nil 'summary 'summary-mode 'summary-dummy)
2872   (gnus-update-summary-mark-positions))
2873
2874 (defun gnus-summary-make-local-variables ()
2875   "Make all the local summary buffer variables."
2876   (let (global)
2877     (dolist (local gnus-summary-local-variables)
2878       (if (consp local)
2879           (progn
2880             (if (eq (cdr local) 'global)
2881                 ;; Copy the global value of the variable.
2882                 (setq global (symbol-value (car local)))
2883               ;; Use the value from the list.
2884               (setq global (eval (cdr local))))
2885             (set (make-local-variable (car local)) global))
2886         ;; Simple nil-valued local variable.
2887         (set (make-local-variable local) nil)))))
2888
2889 (defun gnus-summary-clear-local-variables ()
2890   (let ((locals gnus-summary-local-variables))
2891     (while locals
2892       (if (consp (car locals))
2893           (and (vectorp (caar locals))
2894                (set (caar locals) nil))
2895         (and (vectorp (car locals))
2896              (set (car locals) nil)))
2897       (setq locals (cdr locals)))))
2898
2899 ;; Summary data functions.
2900
2901 (defmacro gnus-data-number (data)
2902   `(car ,data))
2903
2904 (defmacro gnus-data-set-number (data number)
2905   `(setcar ,data ,number))
2906
2907 (defmacro gnus-data-mark (data)
2908   `(nth 1 ,data))
2909
2910 (defmacro gnus-data-set-mark (data mark)
2911   `(setcar (nthcdr 1 ,data) ,mark))
2912
2913 (defmacro gnus-data-pos (data)
2914   `(nth 2 ,data))
2915
2916 (defmacro gnus-data-set-pos (data pos)
2917   `(setcar (nthcdr 2 ,data) ,pos))
2918
2919 (defmacro gnus-data-header (data)
2920   `(nth 3 ,data))
2921
2922 (defmacro gnus-data-set-header (data header)
2923   `(setf (nth 3 ,data) ,header))
2924
2925 (defmacro gnus-data-level (data)
2926   `(nth 4 ,data))
2927
2928 (defmacro gnus-data-unread-p (data)
2929   `(= (nth 1 ,data) gnus-unread-mark))
2930
2931 (defmacro gnus-data-read-p (data)
2932   `(/= (nth 1 ,data) gnus-unread-mark))
2933
2934 (defmacro gnus-data-pseudo-p (data)
2935   `(consp (nth 3 ,data)))
2936
2937 (defmacro gnus-data-find (number)
2938   `(assq ,number gnus-newsgroup-data))
2939
2940 (defmacro gnus-data-find-list (number &optional data)
2941   `(let ((bdata ,(or data 'gnus-newsgroup-data)))
2942      (memq (assq ,number bdata)
2943            bdata)))
2944
2945 (defmacro gnus-data-make (number mark pos header level)
2946   `(list ,number ,mark ,pos ,header ,level))
2947
2948 (defun gnus-data-enter (after-article number mark pos header level offset)
2949   (let ((data (gnus-data-find-list after-article)))
2950     (unless data
2951       (error "No such article: %d" after-article))
2952     (setcdr data (cons (gnus-data-make number mark pos header level)
2953                        (cdr data)))
2954     (setq gnus-newsgroup-data-reverse nil)
2955     (gnus-data-update-list (cddr data) offset)))
2956
2957 (defun gnus-data-enter-list (after-article list &optional offset)
2958   (when list
2959     (let ((data (and after-article (gnus-data-find-list after-article)))
2960           (ilist list))
2961       (if (not (or data
2962                    after-article))
2963           (let ((odata gnus-newsgroup-data))
2964             (setq gnus-newsgroup-data (nconc list gnus-newsgroup-data))
2965             (when offset
2966               (gnus-data-update-list odata offset)))
2967       ;; Find the last element in the list to be spliced into the main
2968         ;; list.
2969         (while (cdr list)
2970           (setq list (cdr list)))
2971         (if (not data)
2972             (progn
2973               (setcdr list gnus-newsgroup-data)
2974               (setq gnus-newsgroup-data ilist)
2975               (when offset
2976                 (gnus-data-update-list (cdr list) offset)))
2977           (setcdr list (cdr data))
2978           (setcdr data ilist)
2979           (when offset
2980             (gnus-data-update-list (cdr list) offset))))
2981       (setq gnus-newsgroup-data-reverse nil))))
2982
2983 (defun gnus-data-remove (article &optional offset)
2984   (let ((data gnus-newsgroup-data))
2985     (if (= (gnus-data-number (car data)) article)
2986         (progn
2987           (setq gnus-newsgroup-data (cdr gnus-newsgroup-data)
2988                 gnus-newsgroup-data-reverse nil)
2989           (when offset
2990             (gnus-data-update-list gnus-newsgroup-data offset)))
2991       (while (cdr data)
2992         (when (= (gnus-data-number (cadr data)) article)
2993           (setcdr data (cddr data))
2994           (when offset
2995             (gnus-data-update-list (cdr data) offset))
2996           (setq data nil
2997                 gnus-newsgroup-data-reverse nil))
2998         (setq data (cdr data))))))
2999
3000 (defmacro gnus-data-list (backward)
3001   `(if ,backward
3002        (or gnus-newsgroup-data-reverse
3003            (setq gnus-newsgroup-data-reverse
3004                  (reverse gnus-newsgroup-data)))
3005      gnus-newsgroup-data))
3006
3007 (defun gnus-data-update-list (data offset)
3008   "Add OFFSET to the POS of all data entries in DATA."
3009   (setq gnus-newsgroup-data-reverse nil)
3010   (while data
3011     (setcar (nthcdr 2 (car data)) (+ offset (nth 2 (car data))))
3012     (setq data (cdr data))))
3013
3014 (defun gnus-summary-article-pseudo-p (article)
3015   "Say whether this article is a pseudo article or not."
3016   (not (vectorp (gnus-data-header (gnus-data-find article)))))
3017
3018 (defmacro gnus-summary-article-sparse-p (article)
3019   "Say whether this article is a sparse article or not."
3020   `(memq ,article gnus-newsgroup-sparse))
3021
3022 (defmacro gnus-summary-article-ancient-p (article)
3023   "Say whether this article is a sparse article or not."
3024   `(memq ,article gnus-newsgroup-ancient))
3025
3026 (defun gnus-article-parent-p (number)
3027   "Say whether this article is a parent or not."
3028   (let ((data (gnus-data-find-list number)))
3029     (and (cdr data)              ; There has to be an article after...
3030          (< (gnus-data-level (car data)) ; And it has to have a higher level.
3031             (gnus-data-level (nth 1 data))))))
3032
3033 (defun gnus-article-children (number)
3034   "Return a list of all children to NUMBER."
3035   (let* ((data (gnus-data-find-list number))
3036          (level (gnus-data-level (car data)))
3037          children)
3038     (setq data (cdr data))
3039     (while (and data
3040                 (= (gnus-data-level (car data)) (1+ level)))
3041       (push (gnus-data-number (car data)) children)
3042       (setq data (cdr data)))
3043     children))
3044
3045 (defmacro gnus-summary-skip-intangible ()
3046   "If the current article is intangible, then jump to a different article."
3047   '(let ((to (get-text-property (point) 'gnus-intangible)))
3048      (and to (gnus-summary-goto-subject to))))
3049
3050 (defmacro gnus-summary-article-intangible-p ()
3051   "Say whether this article is intangible or not."
3052   '(get-text-property (point) 'gnus-intangible))
3053
3054 (defun gnus-article-read-p (article)
3055   "Say whether ARTICLE is read or not."
3056   (not (or (memq article gnus-newsgroup-marked)
3057            (memq article gnus-newsgroup-spam-marked)
3058            (memq article gnus-newsgroup-unreads)
3059            (memq article gnus-newsgroup-unselected)
3060            (memq article gnus-newsgroup-dormant))))
3061
3062 ;; Some summary mode macros.
3063
3064 (defmacro gnus-summary-article-number ()
3065   "The article number of the article on the current line.
3066 If there isn't an article number here, then we return the current
3067 article number."
3068   '(progn
3069      (gnus-summary-skip-intangible)
3070      (or (get-text-property (point) 'gnus-number)
3071          (gnus-summary-last-subject))))
3072
3073 (defmacro gnus-summary-article-header (&optional number)
3074   "Return the header of article NUMBER."
3075   `(gnus-data-header (gnus-data-find
3076                       ,(or number '(gnus-summary-article-number)))))
3077
3078 (defmacro gnus-summary-thread-level (&optional number)
3079   "Return the level of thread that starts with article NUMBER."
3080   `(if (and (eq gnus-summary-make-false-root 'dummy)
3081             (get-text-property (point) 'gnus-intangible))
3082        0
3083      (gnus-data-level (gnus-data-find
3084                        ,(or number '(gnus-summary-article-number))))))
3085
3086 (defmacro gnus-summary-article-mark (&optional number)
3087   "Return the mark of article NUMBER."
3088   `(gnus-data-mark (gnus-data-find
3089                     ,(or number '(gnus-summary-article-number)))))
3090
3091 (defmacro gnus-summary-article-pos (&optional number)
3092   "Return the position of the line of article NUMBER."
3093   `(gnus-data-pos (gnus-data-find
3094                    ,(or number '(gnus-summary-article-number)))))
3095
3096 (defalias 'gnus-summary-subject-string 'gnus-summary-article-subject)
3097 (defmacro gnus-summary-article-subject (&optional number)
3098   "Return current subject string or nil if nothing."
3099   `(let ((headers
3100           ,(if number
3101                `(gnus-data-header (assq ,number gnus-newsgroup-data))
3102              '(gnus-data-header (assq (gnus-summary-article-number)
3103                                       gnus-newsgroup-data)))))
3104      (and headers
3105           (vectorp headers)
3106           (mail-header-subject headers))))
3107
3108 (defmacro gnus-summary-article-score (&optional number)
3109   "Return current article score."
3110   `(or (cdr (assq ,(or number '(gnus-summary-article-number))
3111                   gnus-newsgroup-scored))
3112        gnus-summary-default-score 0))
3113
3114 (defun gnus-summary-article-children (&optional number)
3115   "Return a list of article numbers that are children of article NUMBER."
3116   (let* ((data (gnus-data-find-list (or number (gnus-summary-article-number))))
3117          (level (gnus-data-level (car data)))
3118          l children)
3119     (while (and (setq data (cdr data))
3120                 (> (setq l (gnus-data-level (car data))) level))
3121       (and (= (1+ level) l)
3122            (push (gnus-data-number (car data))
3123                  children)))
3124     (nreverse children)))
3125
3126 (defun gnus-summary-article-parent (&optional number)
3127   "Return the article number of the parent of article NUMBER."
3128   (let* ((data (gnus-data-find-list (or number (gnus-summary-article-number))
3129                                     (gnus-data-list t)))
3130          (level (gnus-data-level (car data))))
3131     (if (zerop level)
3132         ()                              ; This is a root.
3133       ;; We search until we find an article with a level less than
3134       ;; this one.  That function has to be the parent.
3135       (while (and (setq data (cdr data))
3136                   (not (< (gnus-data-level (car data)) level))))
3137       (and data (gnus-data-number (car data))))))
3138
3139 (defun gnus-unread-mark-p (mark)
3140   "Say whether MARK is the unread mark."
3141   (= mark gnus-unread-mark))
3142
3143 (defun gnus-read-mark-p (mark)
3144   "Say whether MARK is one of the marks that mark as read.
3145 This is all marks except unread, ticked, dormant, and expirable."
3146   (not (or (= mark gnus-unread-mark)
3147            (= mark gnus-ticked-mark)
3148            (= mark gnus-spam-mark)
3149            (= mark gnus-dormant-mark)
3150            (= mark gnus-expirable-mark))))
3151
3152 (defmacro gnus-article-mark (number)
3153   "Return the MARK of article NUMBER.
3154 This macro should only be used when computing the mark the \"first\"
3155 time; i.e., when generating the summary lines.  After that,
3156 `gnus-summary-article-mark' should be used to examine the
3157 marks of articles."
3158   `(cond
3159     ((memq ,number gnus-newsgroup-unsendable) gnus-unsendable-mark)
3160     ((memq ,number gnus-newsgroup-downloadable) gnus-downloadable-mark)
3161     ((memq ,number gnus-newsgroup-unreads) gnus-unread-mark)
3162     ((memq ,number gnus-newsgroup-marked) gnus-ticked-mark)
3163     ((memq ,number gnus-newsgroup-spam-marked) gnus-spam-mark)
3164     ((memq ,number gnus-newsgroup-dormant) gnus-dormant-mark)
3165     ((memq ,number gnus-newsgroup-expirable) gnus-expirable-mark)
3166     (t (or (cdr (assq ,number gnus-newsgroup-reads))
3167            gnus-ancient-mark))))
3168
3169 ;; Saving hidden threads.
3170
3171 (defmacro gnus-save-hidden-threads (&rest forms)
3172   "Save hidden threads, eval FORMS, and restore the hidden threads."
3173   (let ((config (make-symbol "config")))
3174     `(let ((,config (gnus-hidden-threads-configuration)))
3175        (unwind-protect
3176            (save-excursion
3177              ,@forms)
3178          (gnus-restore-hidden-threads-configuration ,config)))))
3179 (put 'gnus-save-hidden-threads 'lisp-indent-function 0)
3180 (put 'gnus-save-hidden-threads 'edebug-form-spec '(body))
3181
3182 (defun gnus-data-compute-positions ()
3183   "Compute the positions of all articles."
3184   (setq gnus-newsgroup-data-reverse nil)
3185   (let ((data gnus-newsgroup-data))
3186     (save-excursion
3187       (gnus-save-hidden-threads
3188         (gnus-summary-show-all-threads)
3189         (goto-char (point-min))
3190         (while data
3191           (while (get-text-property (point) 'gnus-intangible)
3192             (forward-line 1))
3193           (gnus-data-set-pos (car data) (+ (point) 3))
3194           (setq data (cdr data))
3195           (forward-line 1))))))
3196
3197 (defun gnus-hidden-threads-configuration ()
3198   "Return the current hidden threads configuration."
3199   (save-excursion
3200     (let (config)
3201       (goto-char (point-min))
3202       (while (search-forward "\r" nil t)
3203         (push (1- (point)) config))
3204       config)))
3205
3206 (defun gnus-restore-hidden-threads-configuration (config)
3207   "Restore hidden threads configuration from CONFIG."
3208   (save-excursion
3209     (let (point buffer-read-only)
3210       (while (setq point (pop config))
3211         (when (and (< point (point-max))
3212                    (goto-char point)
3213                    (eq (char-after) ?\n))
3214           (subst-char-in-region point (1+ point) ?\n ?\r))))))
3215
3216 ;; Various summary mode internalish functions.
3217
3218 (defun gnus-mouse-pick-article (e)
3219   (interactive "e")
3220   (mouse-set-point e)
3221   (gnus-summary-next-page nil t))
3222
3223 (defun gnus-summary-set-display-table ()
3224   "Change the display table.
3225 Odd characters have a tendency to mess
3226 up nicely formatted displays - we make all possible glyphs
3227 display only a single character."
3228
3229   ;; We start from the standard display table, if any.
3230   (let ((table (or (copy-sequence standard-display-table)
3231                    (make-display-table)))
3232         (i 32))
3233     ;; Nix out all the control chars...
3234     (while (>= (setq i (1- i)) 0)
3235       (aset table i [??]))
3236    ;; ... but not newline and cr, of course.  (cr is necessary for the
3237     ;; selective display).
3238     (aset table ?\n nil)
3239     (aset table ?\r nil)
3240     ;; We keep TAB as well.
3241     (aset table ?\t nil)
3242     ;; We nix out any glyphs 127 through 255, or 127 through 159 in
3243     ;; Emacs 23 (unicode), that are not set already.
3244     (let ((i (if (ignore-errors (= (make-char 'latin-iso8859-1 160) 160))
3245                  160
3246                256)))
3247       (while (>= (setq i (1- i)) 127)
3248         ;; Only modify if the entry is nil.
3249         (unless (aref table i)
3250           (aset table i [??]))))
3251     (setq buffer-display-table table)))
3252
3253 (defun gnus-summary-set-article-display-arrow (pos)
3254   "Update the overlay arrow to point to line at position POS."
3255   (when (and gnus-summary-display-arrow
3256              (boundp 'overlay-arrow-position)
3257              (boundp 'overlay-arrow-string))
3258     (save-excursion
3259       (goto-char pos)
3260       (beginning-of-line)
3261       (unless overlay-arrow-position
3262         (setq overlay-arrow-position (make-marker)))
3263       (setq overlay-arrow-string "=>"
3264             overlay-arrow-position (set-marker overlay-arrow-position
3265                                                (point)
3266                                                (current-buffer))))))
3267
3268 (defun gnus-summary-setup-buffer (group)
3269   "Initialize summary buffer."
3270   (let ((buffer (gnus-summary-buffer-name group))
3271         (dead-name (concat "*Dead Summary "
3272                            (gnus-group-decoded-name group) "*")))
3273     ;; If a dead summary buffer exists, we kill it.
3274     (when (gnus-buffer-live-p dead-name)
3275       (gnus-kill-buffer dead-name))
3276     (if (get-buffer buffer)
3277         (progn
3278           (set-buffer buffer)
3279           (setq gnus-summary-buffer (current-buffer))
3280           (not gnus-newsgroup-prepared))
3281       ;; Fix by Sudish Joseph <joseph@cis.ohio-state.edu>
3282       (setq gnus-summary-buffer (set-buffer (gnus-get-buffer-create buffer)))
3283       (gnus-summary-mode group)
3284       (when gnus-carpal
3285         (gnus-carpal-setup-buffer 'summary))
3286       (unless gnus-single-article-buffer
3287         (make-local-variable 'gnus-article-buffer)
3288         (make-local-variable 'gnus-article-current)
3289         (make-local-variable 'gnus-original-article-buffer))
3290       (setq gnus-newsgroup-name group)
3291       ;; Set any local variables in the group parameters.
3292       (gnus-summary-set-local-parameters gnus-newsgroup-name)
3293       t)))
3294
3295 (defun gnus-set-global-variables ()
3296   "Set the global equivalents of the buffer-local variables.
3297 They are set to the latest values they had.  These reflect the summary
3298 buffer that was in action when the last article was fetched."
3299   (when (eq major-mode 'gnus-summary-mode)
3300     (setq gnus-summary-buffer (current-buffer))
3301     (let ((name gnus-newsgroup-name)
3302           (marked gnus-newsgroup-marked)
3303           (spam gnus-newsgroup-spam-marked)
3304           (unread gnus-newsgroup-unreads)
3305           (headers gnus-current-headers)
3306           (data gnus-newsgroup-data)
3307           (summary gnus-summary-buffer)
3308           (article-buffer gnus-article-buffer)
3309           (original gnus-original-article-buffer)
3310           (gac gnus-article-current)
3311           (reffed gnus-reffed-article-number)
3312           (score-file gnus-current-score-file)
3313           (default-charset gnus-newsgroup-charset)
3314           vlist)
3315       (let ((locals gnus-newsgroup-variables))
3316         (while locals
3317           (if (consp (car locals))
3318               (push (eval (caar locals)) vlist)
3319             (push (eval (car locals)) vlist))
3320           (setq locals (cdr locals)))
3321         (setq vlist (nreverse vlist)))
3322       (save-excursion
3323         (set-buffer gnus-group-buffer)
3324         (setq gnus-newsgroup-name name
3325               gnus-newsgroup-marked marked
3326               gnus-newsgroup-spam-marked spam
3327               gnus-newsgroup-unreads unread
3328               gnus-current-headers headers
3329               gnus-newsgroup-data data
3330               gnus-article-current gac
3331               gnus-summary-buffer summary
3332               gnus-article-buffer article-buffer
3333               gnus-original-article-buffer original
3334               gnus-reffed-article-number reffed
3335               gnus-current-score-file score-file
3336               gnus-newsgroup-charset default-charset)
3337         (let ((locals gnus-newsgroup-variables))
3338           (while locals
3339             (if (consp (car locals))
3340                 (set (caar locals) (pop vlist))
3341               (set (car locals) (pop vlist)))
3342             (setq locals (cdr locals))))
3343         ;; The article buffer also has local variables.
3344         (when (gnus-buffer-live-p gnus-article-buffer)
3345           (set-buffer gnus-article-buffer)
3346           (setq gnus-summary-buffer summary))))))
3347
3348 (defun gnus-summary-article-unread-p (article)
3349   "Say whether ARTICLE is unread or not."
3350   (memq article gnus-newsgroup-unreads))
3351
3352 (defun gnus-summary-first-article-p (&optional article)
3353   "Return whether ARTICLE is the first article in the buffer."
3354   (if (not (setq article (or article (gnus-summary-article-number))))
3355       nil
3356     (eq article (caar gnus-newsgroup-data))))
3357
3358 (defun gnus-summary-last-article-p (&optional article)
3359   "Return whether ARTICLE is the last article in the buffer."
3360   (if (not (setq article (or article (gnus-summary-article-number))))
3361       ;; All non-existent numbers are the last article.  :-)
3362       t
3363     (not (cdr (gnus-data-find-list article)))))
3364
3365 (defun gnus-make-thread-indent-array (&optional n)
3366   (when (or n
3367             (progn (setq n 200) nil)
3368             (null gnus-thread-indent-array)
3369             (/= gnus-thread-indent-level gnus-thread-indent-array-level))
3370     (setq gnus-thread-indent-array (make-vector (1+ n) "")
3371           gnus-thread-indent-array-level gnus-thread-indent-level)
3372     (while (>= n 0)
3373       (aset gnus-thread-indent-array n
3374             (make-string (* n gnus-thread-indent-level) ? ))
3375       (setq n (1- n)))))
3376
3377 (defun gnus-update-summary-mark-positions ()
3378   "Compute where the summary marks are to go."
3379   (save-excursion
3380     (when (gnus-buffer-exists-p gnus-summary-buffer)
3381       (set-buffer gnus-summary-buffer))
3382     (let ((spec gnus-summary-line-format-spec)
3383           pos)
3384       (save-excursion
3385         (gnus-set-work-buffer)
3386         (let ((gnus-tmp-unread ?Z)
3387               (gnus-replied-mark ?Z)
3388               (gnus-score-below-mark ?Z)
3389               (gnus-score-over-mark ?Z)
3390               (gnus-undownloaded-mark ?Z)
3391               (gnus-summary-line-format-spec spec)
3392               (gnus-newsgroup-downloadable '(0))
3393               (header [0 "" "" "05 Apr 2001 23:33:09 +0400" "" "" 0 0 "" nil])
3394               case-fold-search ignores)
3395           ;; Here, all marks are bound to Z.
3396           (gnus-summary-insert-line header
3397                                     0 nil t gnus-tmp-unread t nil "" nil 1)
3398           (goto-char (point-min))
3399           ;; Memorize the positions of the same characters as dummy marks.
3400           (while (re-search-forward "[A-D]" nil t)
3401             (push (point) ignores))
3402           (erase-buffer)
3403           ;; We use A-D as dummy marks in order to know column positions
3404           ;; where marks should be inserted.
3405           (setq gnus-tmp-unread ?A
3406                 gnus-replied-mark ?B
3407                 gnus-score-below-mark ?C
3408                 gnus-score-over-mark ?C
3409                 gnus-undownloaded-mark ?D)
3410           (gnus-summary-insert-line header
3411                                     0 nil t gnus-tmp-unread t nil "" nil 1)
3412           ;; Ignore characters which aren't dummy marks.
3413           (dolist (p ignores)
3414             (delete-region (goto-char (1- p)) p)
3415             (insert ?Z))
3416           (goto-char (point-min))
3417           (setq pos (list (cons 'unread
3418                                 (and (search-forward "A" nil t)
3419                                      (- (point) (point-min) 1)))))
3420           (goto-char (point-min))
3421           (push (cons 'replied (and (search-forward "B" nil t)
3422                                     (- (point) (point-min) 1)))
3423                 pos)
3424           (goto-char (point-min))
3425           (push (cons 'score (and (search-forward "C" nil t)
3426                                   (- (point) (point-min) 1)))
3427                 pos)
3428           (goto-char (point-min))
3429           (push (cons 'download (and (search-forward "D" nil t)
3430                                      (- (point) (point-min) 1)))
3431                 pos)))
3432       (setq gnus-summary-mark-positions pos))))
3433
3434 (defun gnus-summary-insert-dummy-line (gnus-tmp-subject gnus-tmp-number)
3435   "Insert a dummy root in the summary buffer."
3436   (beginning-of-line)
3437   (gnus-add-text-properties
3438    (point) (progn (eval gnus-summary-dummy-line-format-spec) (point))
3439    (list 'gnus-number gnus-tmp-number 'gnus-intangible gnus-tmp-number)))
3440
3441 (defun gnus-summary-extract-address-component (from)
3442   (or (car (funcall gnus-extract-address-components from))
3443       from))
3444
3445 (defun gnus-summary-from-or-to-or-newsgroups (header gnus-tmp-from)
3446   (let ((mail-parse-charset gnus-newsgroup-charset)
3447         ; Is it really necessary to do this next part for each summary line?
3448         ; Luckily, doesn't seem to slow things down much.
3449         (mail-parse-ignored-charsets
3450          (save-excursion (set-buffer gnus-summary-buffer)
3451                          gnus-newsgroup-ignored-charsets)))
3452     (or
3453      (and gnus-ignored-from-addresses
3454           (string-match gnus-ignored-from-addresses gnus-tmp-from)
3455           (let ((extra-headers (mail-header-extra header))
3456                 to
3457                 newsgroups)
3458             (cond
3459              ((setq to (cdr (assq 'To extra-headers)))
3460               (concat "-> "
3461                       (inline
3462                         (gnus-summary-extract-address-component
3463                          (funcall gnus-decode-encoded-address-function to)))))
3464              ((setq newsgroups (cdr (assq 'Newsgroups extra-headers)))
3465               (concat "=> " newsgroups)))))
3466      (inline (gnus-summary-extract-address-component gnus-tmp-from)))))
3467
3468 (defun gnus-summary-insert-line (gnus-tmp-header
3469                                  gnus-tmp-level gnus-tmp-current
3470                                  undownloaded gnus-tmp-unread gnus-tmp-replied
3471                                  gnus-tmp-expirable gnus-tmp-subject-or-nil
3472                                  &optional gnus-tmp-dummy gnus-tmp-score
3473                                  gnus-tmp-process)
3474   (if (>= gnus-tmp-level (length gnus-thread-indent-array))
3475       (gnus-make-thread-indent-array (max (* 2 (length gnus-thread-indent-array))
3476                                           gnus-tmp-level)))
3477   (let* ((gnus-tmp-indentation (aref gnus-thread-indent-array gnus-tmp-level))
3478          (gnus-tmp-lines (mail-header-lines gnus-tmp-header))
3479          (gnus-tmp-score (or gnus-tmp-score gnus-summary-default-score 0))
3480          (gnus-tmp-score-char
3481           (if (or (null gnus-summary-default-score)
3482                   (<= (abs (- gnus-tmp-score gnus-summary-default-score))
3483                       gnus-summary-zcore-fuzz))
3484               ?                         ;Whitespace
3485             (if (< gnus-tmp-score gnus-summary-default-score)
3486                 gnus-score-below-mark gnus-score-over-mark)))
3487          (gnus-tmp-number (mail-header-number gnus-tmp-header))
3488          (gnus-tmp-replied
3489           (cond (gnus-tmp-process gnus-process-mark)
3490                 ((memq gnus-tmp-current gnus-newsgroup-cached)
3491                  gnus-cached-mark)
3492                 (gnus-tmp-replied gnus-replied-mark)
3493                 ((memq gnus-tmp-current gnus-newsgroup-forwarded)
3494                  gnus-forwarded-mark)
3495                 ((memq gnus-tmp-current gnus-newsgroup-saved)
3496                  gnus-saved-mark)
3497                 ((memq gnus-tmp-number gnus-newsgroup-recent)
3498                  gnus-recent-mark)
3499                 ((memq gnus-tmp-number gnus-newsgroup-unseen)
3500                  gnus-unseen-mark)
3501                 (t gnus-no-mark)))
3502          (gnus-tmp-downloaded
3503           (cond (undownloaded
3504                  gnus-undownloaded-mark)
3505                 (gnus-newsgroup-agentized
3506                  gnus-downloaded-mark)
3507                 (t
3508                  gnus-no-mark)))
3509          (gnus-tmp-from (mail-header-from gnus-tmp-header))
3510          (gnus-tmp-name
3511           (cond
3512            ((string-match "<[^>]+> *$" gnus-tmp-from)
3513             (let ((beg (match-beginning 0)))
3514               (or (and (string-match "^\".+\"" gnus-tmp-from)
3515                        (substring gnus-tmp-from 1 (1- (match-end 0))))
3516                   (substring gnus-tmp-from 0 beg))))
3517            ((string-match "(.+)" gnus-tmp-from)
3518             (substring gnus-tmp-from
3519                        (1+ (match-beginning 0)) (1- (match-end 0))))
3520            (t gnus-tmp-from)))
3521          (gnus-tmp-subject (mail-header-subject gnus-tmp-header))
3522          (gnus-tmp-opening-bracket (if gnus-tmp-dummy ?\< ?\[))
3523          (gnus-tmp-closing-bracket (if gnus-tmp-dummy ?\> ?\]))
3524          (buffer-read-only nil))
3525     (when (string= gnus-tmp-name "")
3526       (setq gnus-tmp-name gnus-tmp-from))
3527     (unless (numberp gnus-tmp-lines)
3528       (setq gnus-tmp-lines -1))
3529     (if (= gnus-tmp-lines -1)
3530         (setq gnus-tmp-lines "?")
3531       (setq gnus-tmp-lines (number-to-string gnus-tmp-lines)))
3532       (gnus-put-text-property
3533      (point)
3534      (progn (eval gnus-summary-line-format-spec) (point))
3535        'gnus-number gnus-tmp-number)
3536     (when (gnus-visual-p 'summary-highlight 'highlight)
3537       (forward-line -1)
3538       (gnus-run-hooks 'gnus-summary-update-hook)
3539       (forward-line 1))))
3540
3541 (defun gnus-summary-update-line (&optional dont-update)
3542   "Update summary line after change."
3543   (when (and gnus-summary-default-score
3544              (not gnus-summary-inhibit-highlight))
3545     (let* ((gnus-summary-inhibit-highlight t) ; Prevent recursion.
3546            (article (gnus-summary-article-number))
3547            (score (gnus-summary-article-score article)))
3548       (unless dont-update
3549         (if (and gnus-summary-mark-below
3550                  (< (gnus-summary-article-score)
3551                     gnus-summary-mark-below))
3552             ;; This article has a low score, so we mark it as read.
3553             (when (memq article gnus-newsgroup-unreads)
3554               (gnus-summary-mark-article-as-read gnus-low-score-mark))
3555           (when (eq (gnus-summary-article-mark) gnus-low-score-mark)
3556             ;; This article was previously marked as read on account
3557             ;; of a low score, but now it has risen, so we mark it as
3558             ;; unread.
3559             (gnus-summary-mark-article-as-unread gnus-unread-mark)))
3560         (gnus-summary-update-mark
3561          (if (or (null gnus-summary-default-score)
3562                  (<= (abs (- score gnus-summary-default-score))
3563                      gnus-summary-zcore-fuzz))
3564              ?                          ;Whitespace
3565            (if (< score gnus-summary-default-score)
3566                gnus-score-below-mark gnus-score-over-mark))
3567          'score))
3568       ;; Do visual highlighting.
3569       (when (gnus-visual-p 'summary-highlight 'highlight)
3570         (gnus-run-hooks 'gnus-summary-update-hook)))))
3571
3572 (defvar gnus-tmp-new-adopts nil)
3573
3574 (defun gnus-summary-number-of-articles-in-thread (thread &optional level char)
3575   "Return the number of articles in THREAD.
3576 This may be 0 in some cases -- if none of the articles in
3577 the thread are to be displayed."
3578   (let* ((number
3579          ;; Fix by Luc Van Eycken <Luc.VanEycken@esat.kuleuven.ac.be>.
3580           (cond
3581            ((not (listp thread))
3582             1)
3583            ((and (consp thread) (cdr thread))
3584             (apply
3585              '+ 1 (mapcar
3586                    'gnus-summary-number-of-articles-in-thread (cdr thread))))
3587            ((null thread)
3588             1)
3589            ((memq (mail-header-number (car thread)) gnus-newsgroup-limit)
3590             1)
3591            (t 0))))
3592     (when (and level (zerop level) gnus-tmp-new-adopts)
3593       (incf number
3594             (apply '+ (mapcar
3595                        'gnus-summary-number-of-articles-in-thread
3596                        gnus-tmp-new-adopts))))
3597     (if char
3598         (if (> number 1) gnus-not-empty-thread-mark
3599           gnus-empty-thread-mark)
3600       number)))
3601
3602 (defsubst gnus-summary-line-message-size (head)
3603   "Return pretty-printed version of message size.
3604 This function is intended to be used in
3605 `gnus-summary-line-format-alist'."
3606   (let ((c (or (mail-header-chars head) -1)))
3607     (cond ((< c 0) "n/a")               ; chars not available
3608           ((< c (* 1000 10)) (format "%1.1fk" (/ c 1024.0)))
3609           ((< c (* 1000 100)) (format "%dk" (/ c 1024.0)))
3610           ((< c (* 1000 10000)) (format "%1.1fM" (/ c (* 1024.0 1024))))
3611           (t (format "%dM" (/ c (* 1024.0 1024)))))))
3612
3613
3614 (defun gnus-summary-set-local-parameters (group)
3615   "Go through the local params of GROUP and set all variable specs in that list."
3616   (let ((params (gnus-group-find-parameter group))
3617         (vars '(quit-config))           ; Ignore quit-config.
3618         elem)
3619     (while params
3620       (setq elem (car params)
3621             params (cdr params))
3622       (and (consp elem)                 ; Has to be a cons.
3623            (consp (cdr elem))           ; The cdr has to be a list.
3624            (symbolp (car elem))         ; Has to be a symbol in there.
3625            (not (memq (car elem) vars))
3626            (ignore-errors               ; So we set it.
3627              (push (car elem) vars)
3628              (make-local-variable (car elem))
3629              (set (car elem) (eval (nth 1 elem))))))))
3630
3631 (defun gnus-summary-read-group (group &optional show-all no-article
3632                                       kill-buffer no-display backward
3633                                       select-articles)
3634   "Start reading news in newsgroup GROUP.
3635 If SHOW-ALL is non-nil, already read articles are also listed.
3636 If NO-ARTICLE is non-nil, no article is selected initially.
3637 If NO-DISPLAY, don't generate a summary buffer."
3638   (let (result)
3639     (while (and group
3640                 (null (setq result
3641                             (let ((gnus-auto-select-next nil))
3642                               (or (gnus-summary-read-group-1
3643                                    group show-all no-article
3644                                    kill-buffer no-display
3645                                    select-articles)
3646                                   (setq show-all nil
3647                                         select-articles nil)))))
3648                 (eq gnus-auto-select-next 'quietly))
3649       (set-buffer gnus-group-buffer)
3650       ;; The entry function called above goes to the next
3651       ;; group automatically, so we go two groups back
3652       ;; if we are searching for the previous group.
3653       (when backward
3654         (gnus-group-prev-unread-group 2))
3655       (if (not (equal group (gnus-group-group-name)))
3656           (setq group (gnus-group-group-name))
3657         (setq group nil)))
3658     result))
3659
3660 (defun gnus-summary-read-group-1 (group show-all no-article
3661                                         kill-buffer no-display
3662                                         &optional select-articles)
3663   ;; Killed foreign groups can't be entered.
3664   ;;  (when (and (not (gnus-group-native-p group))
3665   ;;         (not (gnus-gethash group gnus-newsrc-hashtb)))
3666   ;;    (error "Dead non-native groups can't be entered"))
3667   (gnus-message 5 "Retrieving newsgroup: %s..."
3668                 (gnus-group-decoded-name group))
3669   (let* ((new-group (gnus-summary-setup-buffer group))
3670          (quit-config (gnus-group-quit-config group))
3671          (did-select (and new-group (gnus-select-newsgroup
3672                                      group show-all select-articles))))
3673     (cond
3674      ;; This summary buffer exists already, so we just select it.
3675      ((not new-group)
3676       (gnus-set-global-variables)
3677       (when kill-buffer
3678         (gnus-kill-or-deaden-summary kill-buffer))
3679       (gnus-configure-windows 'summary 'force)
3680       (gnus-set-mode-line 'summary)
3681       (gnus-summary-position-point)
3682       (message "")
3683       t)
3684      ;; We couldn't select this group.
3685      ((null did-select)
3686       (when (and (eq major-mode 'gnus-summary-mode)
3687                  (not (equal (current-buffer) kill-buffer)))
3688         (kill-buffer (current-buffer))
3689         (if (not quit-config)
3690             (progn
3691               ;; Update the info -- marks might need to be removed,
3692               ;; for instance.
3693               (gnus-summary-update-info)
3694               (set-buffer gnus-group-buffer)
3695               (gnus-group-jump-to-group group)
3696               (gnus-group-next-unread-group 1))
3697           (gnus-handle-ephemeral-exit quit-config)))
3698       (let ((grpinfo (gnus-get-info group)))
3699         (if (null (gnus-info-read grpinfo))
3700             (gnus-message 3 "Group %s contains no messages"
3701                           (gnus-group-decoded-name group))
3702           (gnus-message 3 "Can't select group")))
3703       nil)
3704      ;; The user did a `C-g' while prompting for number of articles,
3705      ;; so we exit this group.
3706      ((eq did-select 'quit)
3707       (and (eq major-mode 'gnus-summary-mode)
3708            (not (equal (current-buffer) kill-buffer))
3709            (kill-buffer (current-buffer)))
3710       (when kill-buffer
3711         (gnus-kill-or-deaden-summary kill-buffer))
3712       (if (not quit-config)
3713           (progn
3714             (set-buffer gnus-group-buffer)
3715             (gnus-group-jump-to-group group)
3716             (gnus-group-next-unread-group 1)
3717             (gnus-configure-windows 'group 'force))
3718         (gnus-handle-ephemeral-exit quit-config))
3719       ;; Finally signal the quit.
3720       (signal 'quit nil))
3721      ;; The group was successfully selected.
3722      (t
3723       (gnus-set-global-variables)
3724       ;; Save the active value in effect when the group was entered.
3725       (setq gnus-newsgroup-active
3726             (gnus-copy-sequence
3727              (gnus-active gnus-newsgroup-name)))
3728       ;; You can change the summary buffer in some way with this hook.
3729       (gnus-run-hooks 'gnus-select-group-hook)
3730       (when (memq 'summary (gnus-update-format-specifications
3731                             nil 'summary 'summary-mode 'summary-dummy))
3732         ;; The format specification for the summary line was updated,
3733         ;; so we need to update the mark positions as well.
3734         (gnus-update-summary-mark-positions))
3735       ;; Do score processing.
3736       (when gnus-use-scoring
3737         (gnus-possibly-score-headers))
3738       ;; Check whether to fill in the gaps in the threads.
3739       (when gnus-build-sparse-threads
3740         (gnus-build-sparse-threads))
3741       ;; Find the initial limit.
3742       (if show-all
3743           (let ((gnus-newsgroup-dormant nil))
3744             (gnus-summary-initial-limit show-all))
3745         (gnus-summary-initial-limit show-all))
3746       ;; Generate the summary buffer.
3747       (unless no-display
3748         (gnus-summary-prepare))
3749       (when gnus-use-trees
3750         (gnus-tree-open group)
3751         (setq gnus-summary-highlight-line-function
3752               'gnus-tree-highlight-article))
3753       ;; If the summary buffer is empty, but there are some low-scored
3754       ;; articles or some excluded dormants, we include these in the
3755       ;; buffer.
3756       (when (and (zerop (buffer-size))
3757                  (not no-display))
3758         (cond (gnus-newsgroup-dormant
3759                (gnus-summary-limit-include-dormant))
3760               ((and gnus-newsgroup-scored show-all)
3761                (gnus-summary-limit-include-expunged t))))
3762       ;; Function `gnus-apply-kill-file' must be called in this hook.
3763       (gnus-run-hooks 'gnus-apply-kill-hook)
3764       (if (and (zerop (buffer-size))
3765                (not no-display))
3766           (progn
3767             ;; This newsgroup is empty.
3768             (gnus-summary-catchup-and-exit nil t)
3769             (gnus-message 6 "No unread news")
3770             (when kill-buffer
3771               (gnus-kill-or-deaden-summary kill-buffer))
3772             ;; Return nil from this function.
3773             nil)
3774         ;; Hide conversation thread subtrees.  We cannot do this in
3775         ;; gnus-summary-prepare-hook since kill processing may not
3776         ;; work with hidden articles.
3777         (gnus-summary-maybe-hide-threads)
3778         (when kill-buffer
3779           (gnus-kill-or-deaden-summary kill-buffer))
3780         (gnus-summary-auto-select-subject)
3781         ;; Show first unread article if requested.
3782         (if (and (not no-article)
3783                  (not no-display)
3784                  gnus-newsgroup-unreads
3785                  gnus-auto-select-first)
3786             (progn
3787               (gnus-configure-windows 'summary)
3788               (let ((art (gnus-summary-article-number)))
3789                 (unless (and (not gnus-plugged)
3790                              (or (memq art gnus-newsgroup-undownloaded)
3791                                  (memq art gnus-newsgroup-downloadable)))
3792                   (gnus-summary-goto-article art))))
3793           ;; Don't select any articles.
3794           (gnus-summary-position-point)
3795           (gnus-configure-windows 'summary 'force)
3796           (gnus-set-mode-line 'summary))
3797         (when (and gnus-auto-center-group
3798                    (get-buffer-window gnus-group-buffer t))
3799           ;; Gotta use windows, because recenter does weird stuff if
3800           ;; the current buffer ain't the displayed window.
3801           (let ((owin (selected-window)))
3802             (select-window (get-buffer-window gnus-group-buffer t))
3803             (when (gnus-group-goto-group group)
3804               (recenter))
3805             (select-window owin)))
3806         ;; Mark this buffer as "prepared".
3807         (setq gnus-newsgroup-prepared t)
3808         (gnus-run-hooks 'gnus-summary-prepared-hook)
3809         (unless (gnus-ephemeral-group-p group)
3810           (gnus-group-update-group group))
3811         t)))))
3812
3813 (defun gnus-summary-auto-select-subject ()
3814   "Select the subject line on initial group entry."
3815   (goto-char (point-min))
3816   (cond
3817    ((eq gnus-auto-select-subject 'best)
3818     (gnus-summary-best-unread-subject))
3819    ((eq gnus-auto-select-subject 'unread)
3820     (gnus-summary-first-unread-subject))
3821    ((eq gnus-auto-select-subject 'unseen)
3822     (gnus-summary-first-unseen-subject))
3823    ((eq gnus-auto-select-subject 'unseen-or-unread)
3824     (gnus-summary-first-unseen-or-unread-subject))
3825    ((eq gnus-auto-select-subject 'first)
3826     ;; Do nothing.
3827     )
3828    ((functionp gnus-auto-select-subject)
3829     (funcall gnus-auto-select-subject))))
3830
3831 (defun gnus-summary-prepare ()
3832   "Generate the summary buffer."
3833   (interactive)
3834   (let ((buffer-read-only nil))
3835     (erase-buffer)
3836     (setq gnus-newsgroup-data nil
3837           gnus-newsgroup-data-reverse nil)
3838     (gnus-run-hooks 'gnus-summary-generate-hook)
3839     ;; Generate the buffer, either with threads or without.
3840     (when gnus-newsgroup-headers
3841       (gnus-summary-prepare-threads
3842        (if gnus-show-threads
3843            (gnus-sort-gathered-threads
3844             (funcall gnus-summary-thread-gathering-function
3845                      (gnus-sort-threads
3846                       (gnus-cut-threads (gnus-make-threads)))))
3847          ;; Unthreaded display.
3848          (gnus-sort-articles gnus-newsgroup-headers))))
3849     (setq gnus-newsgroup-data (nreverse gnus-newsgroup-data))
3850     ;; Call hooks for modifying summary buffer.
3851     (goto-char (point-min))
3852     (gnus-run-hooks 'gnus-summary-prepare-hook)))
3853
3854 (defsubst gnus-general-simplify-subject (subject)
3855   "Simplify subject by the same rules as `gnus-gather-threads-by-subject'."
3856   (setq subject
3857         (cond
3858          ;; Truncate the subject.
3859          (gnus-simplify-subject-functions
3860           (gnus-map-function gnus-simplify-subject-functions subject))
3861          ((numberp gnus-summary-gather-subject-limit)
3862           (setq subject (gnus-simplify-subject-re subject))
3863           (if (> (length subject) gnus-summary-gather-subject-limit)
3864               (substring subject 0 gnus-summary-gather-subject-limit)
3865             subject))
3866          ;; Fuzzily simplify it.
3867          ((eq 'fuzzy gnus-summary-gather-subject-limit)
3868           (gnus-simplify-subject-fuzzy subject))
3869          ;; Just remove the leading "Re:".
3870          (t
3871           (gnus-simplify-subject-re subject))))
3872
3873   (if (and gnus-summary-gather-exclude-subject
3874            (string-match gnus-summary-gather-exclude-subject subject))
3875       nil                         ; This article shouldn't be gathered
3876     subject))
3877
3878 (defun gnus-summary-simplify-subject-query ()
3879   "Query where the respool algorithm would put this article."
3880   (interactive)
3881   (gnus-summary-select-article)
3882   (message (gnus-general-simplify-subject (gnus-summary-article-subject))))
3883
3884 (defun gnus-gather-threads-by-subject (threads)
3885   "Gather threads by looking at Subject headers."
3886   (if (not gnus-summary-make-false-root)
3887       threads
3888     (let ((hashtb (gnus-make-hashtable 1024))
3889           (prev threads)
3890           (result threads)
3891           subject hthread whole-subject)
3892       (while threads
3893         (setq subject (gnus-general-simplify-subject
3894                        (setq whole-subject (mail-header-subject
3895                                             (caar threads)))))
3896         (when subject
3897           (if (setq hthread (gnus-gethash subject hashtb))
3898               (progn
3899                 ;; We enter a dummy root into the thread, if we
3900                 ;; haven't done that already.
3901                 (unless (stringp (caar hthread))
3902                   (setcar hthread (list whole-subject (car hthread))))
3903                 ;; We add this new gathered thread to this gathered
3904                 ;; thread.
3905                 (setcdr (car hthread)
3906                         (nconc (cdar hthread) (list (car threads))))
3907                 ;; Remove it from the list of threads.
3908                 (setcdr prev (cdr threads))
3909                 (setq threads prev))
3910             ;; Enter this thread into the hash table.
3911             (gnus-sethash subject
3912                           (if gnus-summary-make-false-root-always
3913                               (progn
3914                                 ;; If you want a dummy root above all
3915                                 ;; threads...
3916                                 (setcar threads (list whole-subject
3917                                                       (car threads)))
3918                                 threads)
3919                             threads)
3920                           hashtb)))
3921         (setq prev threads)
3922         (setq threads (cdr threads)))
3923       result)))
3924
3925 (defun gnus-gather-threads-by-references (threads)
3926   "Gather threads by looking at References headers."
3927   (let ((idhashtb (gnus-make-hashtable 1024))
3928         (thhashtb (gnus-make-hashtable 1024))
3929         (prev threads)
3930         (result threads)
3931         ids references id gthread gid entered ref)
3932     (while threads
3933       (when (setq references (mail-header-references (caar threads)))
3934         (setq id (mail-header-id (caar threads))
3935               ids (inline (gnus-split-references references))
3936               entered nil)
3937         (while (setq ref (pop ids))
3938           (setq ids (delete ref ids))
3939           (if (not (setq gid (gnus-gethash ref idhashtb)))
3940               (progn
3941                 (gnus-sethash ref id idhashtb)
3942                 (gnus-sethash id threads thhashtb))
3943             (setq gthread (gnus-gethash gid thhashtb))
3944             (unless entered
3945               ;; We enter a dummy root into the thread, if we
3946               ;; haven't done that already.
3947               (unless (stringp (caar gthread))
3948                 (setcar gthread (list (mail-header-subject (caar gthread))
3949                                       (car gthread))))
3950               ;; We add this new gathered thread to this gathered
3951               ;; thread.
3952               (setcdr (car gthread)
3953                       (nconc (cdar gthread) (list (car threads)))))
3954             ;; Add it into the thread hash table.
3955             (gnus-sethash id gthread thhashtb)
3956             (setq entered t)
3957             ;; Remove it from the list of threads.
3958             (setcdr prev (cdr threads))
3959             (setq threads prev))))
3960       (setq prev threads)
3961       (setq threads (cdr threads)))
3962     result))
3963
3964 (defun gnus-sort-gathered-threads (threads)
3965   "Sort subtreads inside each gathered thread by `gnus-sort-gathered-threads-function'."
3966   (let ((result threads))
3967     (while threads
3968       (when (stringp (caar threads))
3969         (setcdr (car threads)
3970                 (sort (cdar threads) gnus-sort-gathered-threads-function)))
3971       (setq threads (cdr threads)))
3972     result))
3973
3974 (defun gnus-thread-loop-p (root thread)
3975   "Say whether ROOT is in THREAD."
3976   (let ((stack (list thread))
3977         (infloop 0)
3978         th)
3979     (while (setq thread (pop stack))
3980       (setq th (cdr thread))
3981       (while (and th
3982                   (not (eq (caar th) root)))
3983         (pop th))
3984       (if th
3985           ;; We have found a loop.
3986           (let (ref-dep)
3987             (setcdr thread (delq (car th) (cdr thread)))
3988             (if (boundp (setq ref-dep (intern "none"
3989                                               gnus-newsgroup-dependencies)))
3990                 (setcdr (symbol-value ref-dep)
3991                         (nconc (cdr (symbol-value ref-dep))
3992                                (list (car th))))
3993               (set ref-dep (list nil (car th))))
3994             (setq infloop 1
3995                   stack nil))
3996         ;; Push all the subthreads onto the stack.
3997         (push (cdr thread) stack)))
3998     infloop))
3999
4000 (defun gnus-make-threads ()
4001   "Go through the dependency hashtb and find the roots.  Return all threads."
4002   (let (threads)
4003     (while (catch 'infloop
4004              (mapatoms
4005               (lambda (refs)
4006                 ;; Deal with self-referencing References loops.
4007                 (when (and (car (symbol-value refs))
4008                            (not (zerop
4009                                  (apply
4010                                   '+
4011                                   (mapcar
4012                                    (lambda (thread)
4013                                      (gnus-thread-loop-p
4014                                       (car (symbol-value refs)) thread))
4015                                    (cdr (symbol-value refs)))))))
4016                   (setq threads nil)
4017                   (throw 'infloop t))
4018                 (unless (car (symbol-value refs))
4019                   ;; These threads do not refer back to any other
4020                   ;; articles, so they're roots.
4021                   (setq threads (append (cdr (symbol-value refs)) threads))))
4022               gnus-newsgroup-dependencies)))
4023     threads))
4024
4025 ;; Build the thread tree.
4026 (defsubst gnus-dependencies-add-header (header dependencies force-new)
4027   "Enter HEADER into the DEPENDENCIES table if it is not already there.
4028
4029 If FORCE-NEW is not nil, enter HEADER into the DEPENDENCIES table even
4030 if it was already present.
4031
4032 If `gnus-summary-ignore-duplicates' is nil then duplicate Message-IDs
4033 will not be entered in the DEPENDENCIES table.  Otherwise duplicate
4034 Message-IDs will be renamed to a unique Message-ID before being
4035 entered.
4036
4037 Returns HEADER if it was entered in the DEPENDENCIES.  Returns nil otherwise."
4038   (let* ((id (mail-header-id header))
4039          (id-dep (and id (intern id dependencies)))
4040          parent-id ref ref-dep ref-header replaced)
4041     ;; Enter this `header' in the `dependencies' table.
4042     (cond
4043      ((not id-dep)
4044       (setq header nil))
4045      ;; The first two cases do the normal part: enter a new `header'
4046      ;; in the `dependencies' table.
4047      ((not (boundp id-dep))
4048       (set id-dep (list header)))
4049      ((null (car (symbol-value id-dep)))
4050       (setcar (symbol-value id-dep) header))
4051
4052      ;; From here the `header' was already present in the
4053      ;; `dependencies' table.
4054      (force-new
4055       ;; Overrides an existing entry;
4056       ;; just set the header part of the entry.
4057       (setcar (symbol-value id-dep) header)
4058       (setq replaced t))
4059
4060      ;; Renames the existing `header' to a unique Message-ID.
4061      ((not gnus-summary-ignore-duplicates)
4062       ;; An article with this Message-ID has already been seen.
4063       ;; We rename the Message-ID.
4064       (set (setq id-dep (intern (setq id (nnmail-message-id)) dependencies))
4065            (list header))
4066       (mail-header-set-id header id))
4067
4068      ;; The last case ignores an existing entry, except it adds any
4069      ;; additional Xrefs (in case the two articles came from different
4070      ;; servers.
4071      ;; Also sets `header' to `nil' meaning that the `dependencies'
4072      ;; table was *not* modified.
4073      (t
4074       (mail-header-set-xref
4075        (car (symbol-value id-dep))
4076        (concat (or (mail-header-xref (car (symbol-value id-dep)))
4077                    "")
4078                (or (mail-header-xref header) "")))
4079       (setq header nil)))
4080
4081     (when (and header (not replaced))
4082       ;; First check that we are not creating a References loop.
4083       (setq parent-id (gnus-parent-id (mail-header-references header)))
4084       (setq ref parent-id)
4085       (while (and ref
4086                   (setq ref-dep (intern-soft ref dependencies))
4087                   (boundp ref-dep)
4088                   (setq ref-header (car (symbol-value ref-dep))))
4089         (if (string= id ref)
4090             ;; Yuk!  This is a reference loop.  Make the article be a
4091             ;; root article.
4092             (progn
4093               (mail-header-set-references (car (symbol-value id-dep)) "none")
4094               (setq ref nil)
4095               (setq parent-id nil))
4096           (setq ref (gnus-parent-id (mail-header-references ref-header)))))
4097       (setq ref-dep (intern (or parent-id "none") dependencies))
4098       (if (boundp ref-dep)
4099           (setcdr (symbol-value ref-dep)
4100                   (nconc (cdr (symbol-value ref-dep))
4101                          (list (symbol-value id-dep))))
4102         (set ref-dep (list nil (symbol-value id-dep)))))
4103     header))
4104
4105 (defun gnus-extract-message-id-from-in-reply-to (string)
4106   (if (string-match "<[^>]+>" string)
4107       (substring string (match-beginning 0) (match-end 0))
4108     nil))
4109
4110 (defun gnus-build-sparse-threads ()
4111   (let ((headers gnus-newsgroup-headers)
4112         (mail-parse-charset gnus-newsgroup-charset)
4113         (gnus-summary-ignore-duplicates t)
4114         header references generation relations
4115         subject child end new-child date)
4116     ;; First we create an alist of generations/relations, where
4117     ;; generations is how much we trust the relation, and the relation
4118     ;; is parent/child.
4119     (gnus-message 7 "Making sparse threads...")
4120     (save-excursion
4121       (nnheader-set-temp-buffer " *gnus sparse threads*")
4122       (while (setq header (pop headers))
4123         (when (and (setq references (mail-header-references header))
4124                    (not (string= references "")))
4125           (insert references)
4126           (setq child (mail-header-id header)
4127                 subject (mail-header-subject header)
4128                 date (mail-header-date header)
4129                 generation 0)
4130           (while (search-backward ">" nil t)
4131             (setq end (1+ (point)))
4132             (when (search-backward "<" nil t)
4133               (setq new-child (buffer-substring (point) end))
4134               (push (list (incf generation)
4135                           child (setq child new-child)
4136                           subject date)
4137                     relations)))
4138           (when child
4139             (push (list (1+ generation) child nil subject) relations))
4140           (erase-buffer)))
4141       (kill-buffer (current-buffer)))
4142     ;; Sort over trustworthiness.
4143     (mapcar
4144      (lambda (relation)
4145        (when (gnus-dependencies-add-header
4146               (make-full-mail-header
4147                gnus-reffed-article-number
4148                (nth 3 relation) "" (or (nth 4 relation) "")
4149                (nth 1 relation)
4150                (or (nth 2 relation) "") 0 0 "")
4151               gnus-newsgroup-dependencies nil)
4152          (push gnus-reffed-article-number gnus-newsgroup-limit)
4153          (push gnus-reffed-article-number gnus-newsgroup-sparse)
4154          (push (cons gnus-reffed-article-number gnus-sparse-mark)
4155                gnus-newsgroup-reads)
4156          (decf gnus-reffed-article-number)))
4157      (sort relations 'car-less-than-car))
4158     (gnus-message 7 "Making sparse threads...done")))
4159
4160 (defun gnus-build-old-threads ()
4161   ;; Look at all the articles that refer back to old articles, and
4162   ;; fetch the headers for the articles that aren't there.  This will
4163   ;; build complete threads - if the roots haven't been expired by the
4164   ;; server, that is.
4165   (let ((mail-parse-charset gnus-newsgroup-charset)
4166         id heads)
4167     (mapatoms
4168      (lambda (refs)
4169        (when (not (car (symbol-value refs)))
4170          (setq heads (cdr (symbol-value refs)))
4171          (while heads
4172            (if (memq (mail-header-number (caar heads))
4173                      gnus-newsgroup-dormant)
4174                (setq heads (cdr heads))
4175              (setq id (symbol-name refs))
4176              (while (and (setq id (gnus-build-get-header id))
4177                          (not (car (gnus-id-to-thread id)))))
4178              (setq heads nil)))))
4179      gnus-newsgroup-dependencies)))
4180
4181 (defsubst gnus-remove-odd-characters (string)
4182   "Translate STRING into something that doesn't contain weird characters."
4183   (mm-subst-char-in-string
4184    ?\r ?\-
4185    (mm-subst-char-in-string
4186     ?\n ?\- string)))
4187
4188 ;; This function has to be called with point after the article number
4189 ;; on the beginning of the line.
4190 (defsubst gnus-nov-parse-line (number dependencies &optional force-new)
4191   (let ((eol (gnus-point-at-eol))
4192         (buffer (current-buffer))
4193         header references in-reply-to)
4194
4195     ;; overview: [num subject from date id refs chars lines misc]
4196     (unwind-protect
4197         (let (x)
4198           (narrow-to-region (point) eol)
4199           (unless (eobp)
4200             (forward-char))
4201
4202           (setq header
4203                 (make-full-mail-header
4204                  number                 ; number
4205                  (condition-case ()     ; subject
4206                      (gnus-remove-odd-characters
4207                       (funcall gnus-decode-encoded-word-function
4208                                (setq x (nnheader-nov-field))))
4209                    (error x))
4210                  (condition-case ()     ; from
4211                      (gnus-remove-odd-characters
4212                       (funcall gnus-decode-encoded-address-function
4213                                (setq x (nnheader-nov-field))))
4214                    (error x))
4215                  (nnheader-nov-field)   ; date
4216                  (nnheader-nov-read-message-id) ; id
4217                  (setq references (nnheader-nov-field)) ; refs
4218                  (nnheader-nov-read-integer) ; chars
4219                  (nnheader-nov-read-integer) ; lines
4220                  (unless (eobp)
4221                    (if (looking-at "Xref: ")
4222                        (goto-char (match-end 0)))
4223                    (nnheader-nov-field)) ; Xref
4224                  (nnheader-nov-parse-extra)))) ; extra
4225
4226       (widen))
4227
4228     (when (and (string= references "")
4229                (setq in-reply-to (mail-header-extra header))
4230                (setq in-reply-to (cdr (assq 'In-Reply-To in-reply-to))))
4231       (mail-header-set-references
4232        header (gnus-extract-message-id-from-in-reply-to in-reply-to)))
4233
4234     (when gnus-alter-header-function
4235       (funcall gnus-alter-header-function header))
4236     (gnus-dependencies-add-header header dependencies force-new)))
4237
4238 (defun gnus-build-get-header (id)
4239   "Look through the buffer of NOV lines and find the header to ID.
4240 Enter this line into the dependencies hash table, and return
4241 the id of the parent article (if any)."
4242   (let ((deps gnus-newsgroup-dependencies)
4243         found header)
4244     (prog1
4245         (save-excursion
4246           (set-buffer nntp-server-buffer)
4247           (let ((case-fold-search nil))
4248             (goto-char (point-min))
4249             (while (and (not found)
4250                         (search-forward id nil t))
4251               (beginning-of-line)
4252               (setq found (looking-at
4253                            (format "^[^\t]*\t[^\t]*\t[^\t]*\t[^\t]*\t%s"
4254                                    (regexp-quote id))))
4255               (or found (beginning-of-line 2)))
4256             (when found
4257               (beginning-of-line)
4258               (and
4259                (setq header (gnus-nov-parse-line
4260                              (read (current-buffer)) deps))
4261                (gnus-parent-id (mail-header-references header))))))
4262       (when header
4263         (let ((number (mail-header-number header)))
4264           (push number gnus-newsgroup-limit)
4265           (push header gnus-newsgroup-headers)
4266           (if (memq number gnus-newsgroup-unselected)
4267               (progn
4268                 (setq gnus-newsgroup-unreads
4269                       (gnus-add-to-sorted-list gnus-newsgroup-unreads
4270                                                number))
4271                 (setq gnus-newsgroup-unselected
4272                       (delq number gnus-newsgroup-unselected)))
4273             (push number gnus-newsgroup-ancient)))))))
4274
4275 (defun gnus-build-all-threads ()
4276   "Read all the headers."
4277   (let ((gnus-summary-ignore-duplicates t)
4278         (mail-parse-charset gnus-newsgroup-charset)
4279         (dependencies gnus-newsgroup-dependencies)
4280         header article)
4281     (save-excursion
4282       (set-buffer nntp-server-buffer)
4283       (let ((case-fold-search nil))
4284         (goto-char (point-min))
4285         (while (not (eobp))
4286           (ignore-errors
4287             (setq article (read (current-buffer))
4288                   header (gnus-nov-parse-line article dependencies)))
4289           (when header
4290             (save-excursion
4291               (set-buffer gnus-summary-buffer)
4292               (push header gnus-newsgroup-headers)
4293               (if (memq (setq article (mail-header-number header))
4294                         gnus-newsgroup-unselected)
4295                   (progn
4296                     (setq gnus-newsgroup-unreads
4297                           (gnus-add-to-sorted-list
4298                            gnus-newsgroup-unreads article))
4299                     (setq gnus-newsgroup-unselected
4300                           (delq article gnus-newsgroup-unselected)))
4301                 (push article gnus-newsgroup-ancient)))
4302             (forward-line 1)))))))
4303
4304 (defun gnus-summary-update-article-line (article header)
4305   "Update the line for ARTICLE using HEADER."
4306   (let* ((id (mail-header-id header))
4307          (thread (gnus-id-to-thread id)))
4308     (unless thread
4309       (error "Article in no thread"))
4310     ;; Update the thread.
4311     (setcar thread header)
4312     (gnus-summary-goto-subject article)
4313     (let* ((datal (gnus-data-find-list article))
4314            (data (car datal))
4315            (buffer-read-only nil)
4316            (level (gnus-summary-thread-level)))
4317       (gnus-delete-line)
4318       (let ((inserted (- (point)
4319                          (progn
4320                            (gnus-summary-insert-line
4321                             header level nil
4322                             (memq article gnus-newsgroup-undownloaded)
4323                             (gnus-article-mark article)
4324                             (memq article gnus-newsgroup-replied)
4325                             (memq article gnus-newsgroup-expirable)
4326                             ;; Only insert the Subject string when it's different
4327                             ;; from the previous Subject string.
4328                             (if (and
4329                                  gnus-show-threads
4330                                  (gnus-subject-equal
4331                                   (condition-case ()
4332                                       (mail-header-subject
4333                                        (gnus-data-header
4334                                         (cadr
4335                                          (gnus-data-find-list
4336                                           article
4337                                           (gnus-data-list t)))))
4338                                     ;; Error on the side of excessive subjects.
4339                                     (error ""))
4340                                   (mail-header-subject header)))
4341                                 ""
4342                               (mail-header-subject header))
4343                             nil (cdr (assq article gnus-newsgroup-scored))
4344                             (memq article gnus-newsgroup-processable))
4345                            (point)))))
4346         (when (cdr datal)
4347           (gnus-data-update-list
4348            (cdr datal)
4349            (- (gnus-data-pos data) (gnus-data-pos (cadr datal)) inserted)))))))
4350
4351 (defun gnus-summary-update-article (article &optional iheader)
4352   "Update ARTICLE in the summary buffer."
4353   (set-buffer gnus-summary-buffer)
4354   (let* ((header (gnus-summary-article-header article))
4355          (id (mail-header-id header))
4356          (data (gnus-data-find article))
4357          (thread (gnus-id-to-thread id))
4358          (references (mail-header-references header))
4359          (parent
4360           (gnus-id-to-thread
4361            (or (gnus-parent-id
4362                 (when (and references
4363                            (not (equal "" references)))
4364                   references))
4365                "none")))
4366          (buffer-read-only nil)
4367          (old (car thread)))
4368     (when thread
4369       (unless iheader
4370         (setcar thread nil)
4371         (when parent
4372           (delq thread parent)))
4373       (if (gnus-summary-insert-subject id header)
4374           ;; Set the (possibly) new article number in the data structure.
4375           (gnus-data-set-number data (gnus-id-to-article id))
4376         (setcar thread old)
4377         nil))))
4378
4379 (defun gnus-rebuild-thread (id &optional line)
4380   "Rebuild the thread containing ID.
4381 If LINE, insert the rebuilt thread starting on line LINE."
4382   (let ((buffer-read-only nil)
4383         old-pos current thread data)
4384     (if (not gnus-show-threads)
4385         (setq thread (list (car (gnus-id-to-thread id))))
4386       ;; Get the thread this article is part of.
4387       (setq thread (gnus-remove-thread id)))
4388     (setq old-pos (gnus-point-at-bol))
4389     (setq current (save-excursion
4390                     (and (re-search-backward "[\r\n]" nil t)
4391                          (gnus-summary-article-number))))
4392     ;; If this is a gathered thread, we have to go some re-gathering.
4393     (when (stringp (car thread))
4394       (let ((subject (car thread))
4395             roots thr)
4396         (setq thread (cdr thread))
4397         (while thread
4398           (unless (memq (setq thr (gnus-id-to-thread
4399                                    (gnus-root-id
4400                                     (mail-header-id (caar thread)))))
4401                         roots)
4402             (push thr roots))
4403           (setq thread (cdr thread)))
4404         ;; We now have all (unique) roots.
4405         (if (= (length roots) 1)
4406             ;; All the loose roots are now one solid root.
4407             (setq thread (car roots))
4408           (setq thread (cons subject (gnus-sort-threads roots))))))
4409     (let (threads)
4410       ;; We then insert this thread into the summary buffer.
4411       (when line
4412         (goto-char (point-min))
4413         (forward-line (1- line)))
4414       (let (gnus-newsgroup-data gnus-newsgroup-threads)
4415         (if gnus-show-threads
4416             (gnus-summary-prepare-threads (gnus-cut-threads (list thread)))
4417           (gnus-summary-prepare-unthreaded thread))
4418         (setq data (nreverse gnus-newsgroup-data))
4419         (setq threads gnus-newsgroup-threads))
4420       ;; We splice the new data into the data structure.
4421       ;;!!! This is kinda bogus.  We assume that in LINE is non-nil,
4422       ;;!!! then we want to insert at the beginning of the buffer.
4423       ;;!!! That happens to be true with Gnus now, but that may
4424       ;;!!! change in the future.  Perhaps.
4425       (gnus-data-enter-list
4426        (if line nil current) data (- (point) old-pos))
4427       (setq gnus-newsgroup-threads
4428             (nconc threads gnus-newsgroup-threads))
4429       (gnus-data-compute-positions))))
4430
4431 (defun gnus-number-to-header (number)
4432   "Return the header for article NUMBER."
4433   (let ((headers gnus-newsgroup-headers))
4434     (while (and headers
4435                 (not (= number (mail-header-number (car headers)))))
4436       (pop headers))
4437     (when headers
4438       (car headers))))
4439
4440 (defun gnus-parent-headers (in-headers &optional generation)
4441   "Return the headers of the GENERATIONeth parent of HEADERS."
4442   (unless generation
4443     (setq generation 1))
4444   (let ((parent t)
4445         (headers in-headers)
4446         references)
4447     (while (and parent
4448                 (not (zerop generation))
4449                 (setq references (mail-header-references headers)))
4450       (setq headers (if (and references
4451                              (setq parent (gnus-parent-id references)))
4452                         (car (gnus-id-to-thread parent))
4453                       nil))
4454       (decf generation))
4455     (and (not (eq headers in-headers))
4456          headers)))
4457
4458 (defun gnus-id-to-thread (id)
4459   "Return the (sub-)thread where ID appears."
4460   (gnus-gethash id gnus-newsgroup-dependencies))
4461
4462 (defun gnus-id-to-article (id)
4463   "Return the article number of ID."
4464   (let ((thread (gnus-id-to-thread id)))
4465     (when (and thread
4466                (car thread))
4467       (mail-header-number (car thread)))))
4468
4469 (defun gnus-id-to-header (id)
4470   "Return the article headers of ID."
4471   (car (gnus-id-to-thread id)))
4472
4473 (defun gnus-article-displayed-root-p (article)
4474   "Say whether ARTICLE is a root(ish) article."
4475   (let ((level (gnus-summary-thread-level article))
4476         (refs (mail-header-references  (gnus-summary-article-header article)))
4477         particle)
4478     (cond
4479      ((null level) nil)
4480      ((zerop level) t)
4481      ((null refs) t)
4482      ((null (gnus-parent-id refs)) t)
4483      ((and (= 1 level)
4484            (null (setq particle (gnus-id-to-article
4485                                  (gnus-parent-id refs))))
4486            (null (gnus-summary-thread-level particle)))))))
4487
4488 (defun gnus-root-id (id)
4489   "Return the id of the root of the thread where ID appears."
4490   (let (last-id prev)
4491     (while (and id (setq prev (car (gnus-id-to-thread id))))
4492       (setq last-id id
4493             id (gnus-parent-id (mail-header-references prev))))
4494     last-id))
4495
4496 (defun gnus-articles-in-thread (thread)
4497   "Return the list of articles in THREAD."
4498   (cons (mail-header-number (car thread))
4499         (apply 'nconc (mapcar 'gnus-articles-in-thread (cdr thread)))))
4500
4501 (defun gnus-remove-thread (id &optional dont-remove)
4502   "Remove the thread that has ID in it."
4503   (let (headers thread last-id)
4504     ;; First go up in this thread until we find the root.
4505     (setq last-id (gnus-root-id id)
4506           headers (message-flatten-list (gnus-id-to-thread last-id)))
4507     ;; We have now found the real root of this thread.  It might have
4508     ;; been gathered into some loose thread, so we have to search
4509     ;; through the threads to find the thread we wanted.
4510     (let ((threads gnus-newsgroup-threads)
4511           sub)
4512       (while threads
4513         (setq sub (car threads))
4514         (if (stringp (car sub))
4515             ;; This is a gathered thread, so we look at the roots
4516             ;; below it to find whether this article is in this
4517             ;; gathered root.
4518             (progn
4519               (setq sub (cdr sub))
4520               (while sub
4521                 (when (member (caar sub) headers)
4522                   (setq thread (car threads)
4523                         threads nil
4524                         sub nil))
4525                 (setq sub (cdr sub))))
4526           ;; It's an ordinary thread, so we check it.
4527           (when (eq (car sub) (car headers))
4528             (setq thread sub
4529                   threads nil)))
4530         (setq threads (cdr threads)))
4531       ;; If this article is in no thread, then it's a root.
4532       (if thread
4533           (unless dont-remove
4534             (setq gnus-newsgroup-threads (delq thread gnus-newsgroup-threads)))
4535         (setq thread (gnus-id-to-thread last-id)))
4536       (when thread
4537         (prog1
4538             thread                      ; We return this thread.
4539           (unless dont-remove
4540             (if (stringp (car thread))
4541                 (progn
4542                   ;; If we use dummy roots, then we have to remove the
4543                   ;; dummy root as well.
4544                   (when (eq gnus-summary-make-false-root 'dummy)
4545                     ;; We go to the dummy root by going to
4546                     ;; the first sub-"thread", and then one line up.
4547                     (gnus-summary-goto-article
4548                      (mail-header-number (caadr thread)))
4549                     (forward-line -1)
4550                     (gnus-delete-line)
4551                     (gnus-data-compute-positions))
4552                   (setq thread (cdr thread))
4553                   (while thread
4554                     (gnus-remove-thread-1 (car thread))
4555                     (setq thread (cdr thread))))
4556               (gnus-remove-thread-1 thread))))))))
4557
4558 (defun gnus-remove-thread-1 (thread)
4559   "Remove the thread THREAD recursively."
4560   (let ((number (mail-header-number (pop thread)))
4561         d)
4562     (setq thread (reverse thread))
4563     (while thread
4564       (gnus-remove-thread-1 (pop thread)))
4565     (when (setq d (gnus-data-find number))
4566       (goto-char (gnus-data-pos d))
4567       (gnus-summary-show-thread)
4568       (gnus-data-remove
4569        number
4570        (- (gnus-point-at-bol)
4571           (prog1
4572               (1+ (gnus-point-at-eol))
4573             (gnus-delete-line)))))))
4574
4575 (defun gnus-sort-threads-recursive (threads func)
4576   (sort (mapcar (lambda (thread)
4577                   (cons (car thread)
4578                         (and (cdr thread)
4579                              (gnus-sort-threads-recursive (cdr thread) func))))
4580                 threads) func))
4581
4582 (defun gnus-sort-threads-loop (threads func)
4583   (let* ((superthread (cons nil threads))
4584          (stack (list (cons superthread threads)))
4585          remaining-threads thread)
4586     (while stack
4587       (setq remaining-threads (cdr (car stack)))
4588       (if remaining-threads
4589           (progn (setq thread (car remaining-threads))
4590                  (setcdr (car stack) (cdr remaining-threads))
4591                  (if (cdr thread)
4592                      (push (cons thread (cdr thread)) stack)))
4593         (setq thread (caar stack))
4594         (setcdr thread (sort (cdr thread) func))
4595         (pop stack)))
4596     (cdr superthread)))
4597
4598 (defun gnus-sort-threads (threads)
4599   "Sort THREADS."
4600   (if (not gnus-thread-sort-functions)
4601       threads
4602     (gnus-message 8 "Sorting threads...")
4603     (prog1
4604         (condition-case nil
4605             (let ((max-lisp-eval-depth (max max-lisp-eval-depth 5000)))
4606               (gnus-sort-threads-recursive
4607                threads (gnus-make-sort-function gnus-thread-sort-functions)))
4608           ;; Even after binding max-lisp-eval-depth, the recursive
4609           ;; sorter might fail for very long threads.  In that case,
4610           ;; try using a (less well-tested) non-recursive sorter.
4611           (error (gnus-sort-threads-loop
4612                   threads (gnus-make-sort-function
4613                            gnus-thread-sort-functions))))
4614       (gnus-message 8 "Sorting threads...done"))))
4615
4616 (defun gnus-sort-articles (articles)
4617   "Sort ARTICLES."
4618   (when gnus-article-sort-functions
4619     (gnus-message 7 "Sorting articles...")
4620     (prog1
4621         (setq gnus-newsgroup-headers
4622               (sort articles (gnus-make-sort-function
4623                               gnus-article-sort-functions)))
4624       (gnus-message 7 "Sorting articles...done"))))
4625
4626 ;; Written by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>.
4627 (defmacro gnus-thread-header (thread)
4628   "Return header of first article in THREAD.
4629 Note that THREAD must never, ever be anything else than a variable -
4630 using some other form will lead to serious barfage."
4631   (or (symbolp thread) (signal 'wrong-type-argument '(symbolp thread)))
4632   ;; (8% speedup to gnus-summary-prepare, just for fun :-)
4633   (list 'byte-code "\10\211:\203\17\0\211@;\203\16\0A@@\207"
4634         (vector thread) 2))
4635
4636 (defsubst gnus-article-sort-by-number (h1 h2)
4637   "Sort articles by article number."
4638   (< (mail-header-number h1)
4639      (mail-header-number h2)))
4640
4641 (defun gnus-thread-sort-by-number (h1 h2)
4642   "Sort threads by root article number."
4643   (gnus-article-sort-by-number
4644    (gnus-thread-header h1) (gnus-thread-header h2)))
4645
4646 (defsubst gnus-article-sort-by-random (h1 h2)
4647   "Sort articles by article number."
4648   (zerop (random 2)))
4649
4650 (defun gnus-thread-sort-by-random (h1 h2)
4651   "Sort threads by root article number."
4652   (gnus-article-sort-by-random
4653    (gnus-thread-header h1) (gnus-thread-header h2)))
4654
4655 (defsubst gnus-article-sort-by-lines (h1 h2)
4656   "Sort articles by article Lines header."
4657   (< (mail-header-lines h1)
4658      (mail-header-lines h2)))
4659
4660 (defun gnus-thread-sort-by-lines (h1 h2)
4661   "Sort threads by root article Lines header."
4662   (gnus-article-sort-by-lines
4663    (gnus-thread-header h1) (gnus-thread-header h2)))
4664
4665 (defsubst gnus-article-sort-by-chars (h1 h2)
4666   "Sort articles by octet length."
4667   (< (mail-header-chars h1)
4668      (mail-header-chars h2)))
4669
4670 (defun gnus-thread-sort-by-chars (h1 h2)
4671   "Sort threads by root article octet length."
4672   (gnus-article-sort-by-chars
4673    (gnus-thread-header h1) (gnus-thread-header h2)))
4674
4675 (defsubst gnus-article-sort-by-author (h1 h2)
4676   "Sort articles by root author."
4677   (gnus-string<
4678    (let ((extract (funcall
4679                    gnus-extract-address-components
4680                    (mail-header-from h1))))
4681      (or (car extract) (cadr extract) ""))
4682    (let ((extract (funcall
4683                    gnus-extract-address-components
4684                    (mail-header-from h2))))
4685      (or (car extract) (cadr extract) ""))))
4686
4687 (defun gnus-thread-sort-by-author (h1 h2)
4688   "Sort threads by root author."
4689   (gnus-article-sort-by-author
4690    (gnus-thread-header h1)  (gnus-thread-header h2)))
4691
4692 (defsubst gnus-article-sort-by-subject (h1 h2)
4693   "Sort articles by root subject."
4694   (gnus-string<
4695    (downcase (gnus-simplify-subject-re (mail-header-subject h1)))
4696    (downcase (gnus-simplify-subject-re (mail-header-subject h2)))))
4697
4698 (defun gnus-thread-sort-by-subject (h1 h2)
4699   "Sort threads by root subject."
4700   (gnus-article-sort-by-subject
4701    (gnus-thread-header h1) (gnus-thread-header h2)))
4702
4703 (defsubst gnus-article-sort-by-date (h1 h2)
4704   "Sort articles by root article date."
4705   (time-less-p
4706    (gnus-date-get-time (mail-header-date h1))
4707    (gnus-date-get-time (mail-header-date h2))))
4708
4709 (defun gnus-thread-sort-by-date (h1 h2)
4710   "Sort threads by root article date."
4711   (gnus-article-sort-by-date
4712    (gnus-thread-header h1) (gnus-thread-header h2)))
4713
4714 (defsubst gnus-article-sort-by-score (h1 h2)
4715   "Sort articles by root article score.
4716 Unscored articles will be counted as having a score of zero."
4717   (> (or (cdr (assq (mail-header-number h1)
4718                     gnus-newsgroup-scored))
4719          gnus-summary-default-score 0)
4720      (or (cdr (assq (mail-header-number h2)
4721                     gnus-newsgroup-scored))
4722          gnus-summary-default-score 0)))
4723
4724 (defun gnus-thread-sort-by-score (h1 h2)
4725   "Sort threads by root article score."
4726   (gnus-article-sort-by-score
4727    (gnus-thread-header h1) (gnus-thread-header h2)))
4728
4729 (defun gnus-thread-sort-by-total-score (h1 h2)
4730   "Sort threads by the sum of all scores in the thread.
4731 Unscored articles will be counted as having a score of zero."
4732   (> (gnus-thread-total-score h1) (gnus-thread-total-score h2)))
4733
4734 (defun gnus-thread-total-score (thread)
4735   ;; This function find the total score of THREAD.
4736   (cond
4737    ((null thread)
4738     0)
4739    ((consp thread)
4740     (if (stringp (car thread))
4741         (apply gnus-thread-score-function 0
4742                (mapcar 'gnus-thread-total-score-1 (cdr thread)))
4743       (gnus-thread-total-score-1 thread)))
4744    (t
4745     (gnus-thread-total-score-1 (list thread)))))
4746
4747 (defun gnus-thread-sort-by-most-recent-number (h1 h2)
4748   "Sort threads such that the thread with the most recently arrived article comes first."
4749   (> (gnus-thread-highest-number h1) (gnus-thread-highest-number h2)))
4750
4751 (defun gnus-thread-highest-number (thread)
4752   "Return the highest article number in THREAD."
4753   (apply 'max (mapcar (lambda (header)
4754                         (mail-header-number header))
4755                       (message-flatten-list thread))))
4756
4757 (defun gnus-thread-sort-by-most-recent-date (h1 h2)
4758   "Sort threads such that the thread with the most recently dated article comes first."
4759   (> (gnus-thread-latest-date h1) (gnus-thread-latest-date h2)))
4760
4761 (defun gnus-thread-latest-date (thread)
4762   "Return the highest article date in THREAD."
4763   (let ((previous-time 0))
4764     (apply 'max
4765            (mapcar
4766             (lambda (header)
4767               (setq previous-time
4768                     (condition-case ()
4769                         (time-to-seconds (mail-header-parse-date
4770                                           (mail-header-date header)))
4771                       (error previous-time))))
4772             (sort
4773              (message-flatten-list thread)
4774              (lambda (h1 h2)
4775                (< (mail-header-number h1)
4776                   (mail-header-number h2))))))))
4777
4778 (defun gnus-thread-total-score-1 (root)
4779   ;; This function find the total score of the thread below ROOT.
4780   (setq root (car root))
4781   (apply gnus-thread-score-function
4782          (or (append
4783               (mapcar 'gnus-thread-total-score
4784                       (cdr (gnus-id-to-thread (mail-header-id root))))
4785               (when (> (mail-header-number root) 0)
4786                 (list (or (cdr (assq (mail-header-number root)
4787                                      gnus-newsgroup-scored))
4788                           gnus-summary-default-score 0))))
4789              (list gnus-summary-default-score)
4790              '(0))))
4791
4792 ;; Added by Per Abrahamsen <amanda@iesd.auc.dk>.
4793 (defvar gnus-tmp-prev-subject nil)
4794 (defvar gnus-tmp-false-parent nil)
4795 (defvar gnus-tmp-root-expunged nil)
4796 (defvar gnus-tmp-dummy-line nil)
4797
4798 (eval-when-compile (defvar gnus-tmp-header))
4799 (defun gnus-extra-header (type &optional header)
4800   "Return the extra header of TYPE."
4801   (or (cdr (assq type (mail-header-extra (or header gnus-tmp-header))))
4802       ""))
4803
4804 (defvar gnus-tmp-thread-tree-header-string "")
4805
4806 (defcustom gnus-sum-thread-tree-root "> "
4807   "With %B spec, used for the root of a thread.
4808 If nil, use subject instead."
4809   :version "22.1"
4810   :type '(radio (const :format "%v  " nil) string)
4811   :group 'gnus-thread)
4812 (defcustom gnus-sum-thread-tree-false-root "> "
4813   "With %B spec, used for a false root of a thread.
4814 If nil, use subject instead."
4815   :version "22.1"
4816   :type '(radio (const :format "%v  " nil) string)
4817   :group 'gnus-thread)
4818 (defcustom gnus-sum-thread-tree-single-indent ""
4819   "With %B spec, used for a thread with just one message.
4820 If nil, use subject instead."
4821   :version "22.1"
4822   :type '(radio (const :format "%v  " nil) string)
4823   :group 'gnus-thread)
4824 (defcustom gnus-sum-thread-tree-vertical "| "
4825   "With %B spec, used for drawing a vertical line."
4826   :version "22.1"
4827   :type 'string
4828   :group 'gnus-thread)
4829 (defcustom gnus-sum-thread-tree-indent "  "
4830   "With %B spec, used for indenting."
4831   :version "22.1"
4832   :type 'string
4833   :group 'gnus-thread)
4834 (defcustom gnus-sum-thread-tree-leaf-with-other "+-> "
4835   "With %B spec, used for a leaf with brothers."
4836   :version "22.1"
4837   :type 'string
4838   :group 'gnus-thread)
4839 (defcustom gnus-sum-thread-tree-single-leaf "\\-> "
4840   "With %B spec, used for a leaf without brothers."
4841   :version "22.1"
4842   :type 'string
4843   :group 'gnus-thread)
4844
4845 (defun gnus-summary-prepare-threads (threads)
4846   "Prepare summary buffer from THREADS and indentation LEVEL.
4847 THREADS is either a list of `(PARENT [(CHILD1 [(GRANDCHILD ...]...) ...])'
4848 or a straight list of headers."
4849   (gnus-message 7 "Generating summary...")
4850
4851   (setq gnus-newsgroup-threads threads)
4852   (beginning-of-line)
4853
4854   (let ((gnus-tmp-level 0)
4855         (default-score (or gnus-summary-default-score 0))
4856         (gnus-visual-p (gnus-visual-p 'summary-highlight 'highlight))
4857         (building-line-count gnus-summary-display-while-building)
4858         (building-count (integerp gnus-summary-display-while-building))
4859         thread number subject stack state gnus-tmp-gathered beg-match
4860         new-roots gnus-tmp-new-adopts thread-end simp-subject
4861         gnus-tmp-header gnus-tmp-unread gnus-tmp-downloaded
4862         gnus-tmp-replied gnus-tmp-subject-or-nil
4863         gnus-tmp-dummy gnus-tmp-indentation gnus-tmp-lines gnus-tmp-score
4864         gnus-tmp-score-char gnus-tmp-from gnus-tmp-name
4865         gnus-tmp-number gnus-tmp-opening-bracket gnus-tmp-closing-bracket
4866         tree-stack)
4867
4868     (setq gnus-tmp-prev-subject nil
4869           gnus-tmp-thread-tree-header-string "")
4870
4871     (if (vectorp (car threads))
4872         ;; If this is a straight (sic) list of headers, then a
4873         ;; threaded summary display isn't required, so we just create
4874         ;; an unthreaded one.
4875         (gnus-summary-prepare-unthreaded threads)
4876
4877       ;; Do the threaded display.
4878
4879       (if gnus-summary-display-while-building
4880           (switch-to-buffer (buffer-name)))
4881       (while (or threads stack gnus-tmp-new-adopts new-roots)
4882
4883         (if (and (= gnus-tmp-level 0)
4884                  (or (not stack)
4885                      (= (caar stack) 0))
4886                  (not gnus-tmp-false-parent)
4887                  (or gnus-tmp-new-adopts new-roots))
4888             (if gnus-tmp-new-adopts
4889                 (setq gnus-tmp-level (if gnus-tmp-root-expunged 0 1)
4890                       thread (list (car gnus-tmp-new-adopts))
4891                       gnus-tmp-header (caar thread)
4892                       gnus-tmp-new-adopts (cdr gnus-tmp-new-adopts))
4893               (when new-roots
4894                 (setq thread (list (car new-roots))
4895                       gnus-tmp-header (caar thread)
4896                       new-roots (cdr new-roots))))
4897
4898           (if threads
4899               ;; If there are some threads, we do them before the
4900               ;; threads on the stack.
4901               (setq thread threads
4902                     gnus-tmp-header (caar thread))
4903             ;; There were no current threads, so we pop something off
4904             ;; the stack.
4905             (setq state (car stack)
4906                   gnus-tmp-level (car state)
4907                   tree-stack (cadr state)
4908                   thread (caddr state)
4909                   stack (cdr stack)
4910                   gnus-tmp-header (caar thread))))
4911
4912         (setq gnus-tmp-false-parent nil)
4913         (setq gnus-tmp-root-expunged nil)
4914         (setq thread-end nil)
4915
4916         (if (stringp gnus-tmp-header)
4917             ;; The header is a dummy root.
4918             (cond
4919              ((eq gnus-summary-make-false-root 'adopt)
4920               ;; We let the first article adopt the rest.
4921               (setq gnus-tmp-new-adopts (nconc gnus-tmp-new-adopts
4922                                                (cddar thread)))
4923               (setq gnus-tmp-gathered
4924                     (nconc (mapcar
4925                             (lambda (h) (mail-header-number (car h)))
4926                             (cddar thread))
4927                            gnus-tmp-gathered))
4928               (setq thread (cons (list (caar thread)
4929                                        (cadar thread))
4930                                  (cdr thread)))
4931               (setq gnus-tmp-level -1
4932                     gnus-tmp-false-parent t))
4933              ((eq gnus-summary-make-false-root 'empty)
4934               ;; We print adopted articles with empty subject fields.
4935               (setq gnus-tmp-gathered
4936                     (nconc (mapcar
4937                             (lambda (h) (mail-header-number (car h)))
4938                             (cddar thread))
4939                            gnus-tmp-gathered))
4940               (setq gnus-tmp-level -1))
4941              ((eq gnus-summary-make-false-root 'dummy)
4942               ;; We remember that we probably want to output a dummy
4943               ;; root.
4944               (setq gnus-tmp-dummy-line gnus-tmp-header)
4945               (setq gnus-tmp-prev-subject gnus-tmp-header))
4946              (t
4947               ;; We do not make a root for the gathered
4948               ;; sub-threads at all.
4949               (setq gnus-tmp-level -1)))
4950
4951           (setq number (mail-header-number gnus-tmp-header)
4952                 subject (mail-header-subject gnus-tmp-header)
4953                 simp-subject (gnus-simplify-subject-fully subject))
4954
4955           (cond
4956            ;; If the thread has changed subject, we might want to make
4957            ;; this subthread into a root.
4958            ((and (null gnus-thread-ignore-subject)
4959                  (not (zerop gnus-tmp-level))
4960                  gnus-tmp-prev-subject
4961                  (not (string= gnus-tmp-prev-subject simp-subject)))
4962             (setq new-roots (nconc new-roots (list (car thread)))
4963                   thread-end t
4964                   gnus-tmp-header nil))
4965            ;; If the article lies outside the current limit,
4966            ;; then we do not display it.
4967            ((not (memq number gnus-newsgroup-limit))
4968             (setq gnus-tmp-gathered
4969                   (nconc (mapcar
4970                           (lambda (h) (mail-header-number (car h)))
4971                           (cdar thread))
4972                          gnus-tmp-gathered))
4973             (setq gnus-tmp-new-adopts (if (cdar thread)
4974                                           (append gnus-tmp-new-adopts
4975                                                   (cdar thread))
4976                                         gnus-tmp-new-adopts)
4977                   thread-end t
4978                   gnus-tmp-header nil)
4979             (when (zerop gnus-tmp-level)
4980               (setq gnus-tmp-root-expunged t)))
4981            ;; Perhaps this article is to be marked as read?
4982            ((and gnus-summary-mark-below
4983                  (< (or (cdr (assq number gnus-newsgroup-scored))
4984                         default-score)
4985                     gnus-summary-mark-below)
4986                  ;; Don't touch sparse articles.
4987                  (not (gnus-summary-article-sparse-p number))
4988                  (not (gnus-summary-article-ancient-p number)))
4989             (setq gnus-newsgroup-unreads
4990                   (delq number gnus-newsgroup-unreads))
4991             (if gnus-newsgroup-auto-expire
4992                 (setq gnus-newsgroup-expirable
4993                       (gnus-add-to-sorted-list
4994                        gnus-newsgroup-expirable number))
4995               (push (cons number gnus-low-score-mark)
4996                     gnus-newsgroup-reads))))
4997
4998           (when gnus-tmp-header
4999             ;; We may have an old dummy line to output before this
5000             ;; article.
5001             (when (and gnus-tmp-dummy-line
5002                        (gnus-subject-equal
5003                         gnus-tmp-dummy-line
5004                         (mail-header-subject gnus-tmp-header)))
5005               (gnus-summary-insert-dummy-line
5006                gnus-tmp-dummy-line (mail-header-number gnus-tmp-header))
5007               (setq gnus-tmp-dummy-line nil))
5008
5009             ;; Compute the mark.
5010             (setq gnus-tmp-unread (gnus-article-mark number))
5011
5012             (push (gnus-data-make number gnus-tmp-unread (1+ (point))
5013                                   gnus-tmp-header gnus-tmp-level)
5014                   gnus-newsgroup-data)
5015
5016             ;; Actually insert the line.
5017             (setq
5018              gnus-tmp-subject-or-nil
5019              (cond
5020               ((and gnus-thread-ignore-subject
5021                     gnus-tmp-prev-subject
5022                     (not (string= gnus-tmp-prev-subject simp-subject)))
5023                subject)
5024               ((zerop gnus-tmp-level)
5025                (if (and (eq gnus-summary-make-false-root 'empty)
5026                         (memq number gnus-tmp-gathered)
5027                         gnus-tmp-prev-subject
5028                         (string= gnus-tmp-prev-subject simp-subject))
5029                    gnus-summary-same-subject
5030                  subject))
5031               (t gnus-summary-same-subject)))
5032             (if (and (eq gnus-summary-make-false-root 'adopt)
5033                      (= gnus-tmp-level 1)
5034                      (memq number gnus-tmp-gathered))
5035                 (setq gnus-tmp-opening-bracket ?\<
5036                       gnus-tmp-closing-bracket ?\>)
5037               (setq gnus-tmp-opening-bracket ?\[
5038                     gnus-tmp-closing-bracket ?\]))
5039             (if (>= gnus-tmp-level (length gnus-thread-indent-array))
5040                 (gnus-make-thread-indent-array
5041                  (max (* 2 (length gnus-thread-indent-array))
5042                       gnus-tmp-level)))
5043             (setq
5044              gnus-tmp-indentation
5045              (aref gnus-thread-indent-array gnus-tmp-level)
5046              gnus-tmp-lines (mail-header-lines gnus-tmp-header)
5047              gnus-tmp-score (or (cdr (assq number gnus-newsgroup-scored))
5048                                 gnus-summary-default-score 0)
5049              gnus-tmp-score-char
5050              (if (or (null gnus-summary-default-score)
5051                      (<= (abs (- gnus-tmp-score gnus-summary-default-score))
5052                          gnus-summary-zcore-fuzz))
5053                  ?                      ;Whitespace
5054                (if (< gnus-tmp-score gnus-summary-default-score)
5055                    gnus-score-below-mark gnus-score-over-mark))
5056              gnus-tmp-replied
5057              (cond ((memq number gnus-newsgroup-processable)
5058                     gnus-process-mark)
5059                    ((memq number gnus-newsgroup-cached)
5060                     gnus-cached-mark)
5061                    ((memq number gnus-newsgroup-replied)
5062                     gnus-replied-mark)
5063                    ((memq number gnus-newsgroup-forwarded)
5064                     gnus-forwarded-mark)
5065                    ((memq number gnus-newsgroup-saved)
5066                     gnus-saved-mark)
5067                    ((memq number gnus-newsgroup-recent)
5068                     gnus-recent-mark)
5069                    ((memq number gnus-newsgroup-unseen)
5070                     gnus-unseen-mark)
5071                    (t gnus-no-mark))
5072              gnus-tmp-downloaded
5073              (cond ((memq number gnus-newsgroup-undownloaded)
5074                     gnus-undownloaded-mark)
5075                    (gnus-newsgroup-agentized
5076                     gnus-downloaded-mark)
5077                    (t
5078                     gnus-no-mark))
5079              gnus-tmp-from (mail-header-from gnus-tmp-header)
5080              gnus-tmp-name
5081              (cond
5082               ((string-match "<[^>]+> *$" gnus-tmp-from)
5083                (setq beg-match (match-beginning 0))
5084                (or (and (string-match "^\".+\"" gnus-tmp-from)
5085                         (substring gnus-tmp-from 1 (1- (match-end 0))))
5086                    (substring gnus-tmp-from 0 beg-match)))
5087               ((string-match "(.+)" gnus-tmp-from)
5088                (substring gnus-tmp-from
5089                           (1+ (match-beginning 0)) (1- (match-end 0))))
5090               (t gnus-tmp-from))
5091
5092              ;; Do the %B string
5093              gnus-tmp-thread-tree-header-string
5094              (cond
5095               ((not gnus-show-threads) "")
5096               ((zerop gnus-tmp-level)
5097                (cond ((cdar thread)
5098                       (or gnus-sum-thread-tree-root subject))
5099                      (gnus-tmp-new-adopts
5100                       (or gnus-sum-thread-tree-false-root subject))
5101                      (t
5102                       (or gnus-sum-thread-tree-single-indent subject))))
5103               (t
5104                (concat (apply 'concat
5105                               (mapcar (lambda (item)
5106                                         (if (= item 1)
5107                                             gnus-sum-thread-tree-vertical
5108                                           gnus-sum-thread-tree-indent))
5109                                       (cdr (reverse tree-stack))))
5110                        (if (nth 1 thread)
5111                            gnus-sum-thread-tree-leaf-with-other
5112                          gnus-sum-thread-tree-single-leaf)))))
5113             (when (string= gnus-tmp-name "")
5114               (setq gnus-tmp-name gnus-tmp-from))
5115             (unless (numberp gnus-tmp-lines)
5116               (setq gnus-tmp-lines -1))
5117             (if (= gnus-tmp-lines -1)
5118                 (setq gnus-tmp-lines "?")
5119               (setq gnus-tmp-lines (number-to-string gnus-tmp-lines)))
5120               (gnus-put-text-property
5121              (point)
5122              (progn (eval gnus-summary-line-format-spec) (point))
5123                'gnus-number number)
5124             (when gnus-visual-p
5125               (forward-line -1)
5126               (gnus-run-hooks 'gnus-summary-update-hook)
5127               (forward-line 1))
5128
5129             (setq gnus-tmp-prev-subject simp-subject)))
5130
5131         (when (nth 1 thread)
5132           (push (list (max 0 gnus-tmp-level)
5133                       (copy-sequence tree-stack)
5134                       (nthcdr 1 thread))
5135                 stack))
5136         (push (if (nth 1 thread) 1 0) tree-stack)
5137         (incf gnus-tmp-level)
5138         (setq threads (if thread-end nil (cdar thread)))
5139         (if gnus-summary-display-while-building
5140             (if building-count
5141                 (progn
5142                   ;; use a set frequency
5143                   (setq building-line-count (1- building-line-count))
5144                   (when (= building-line-count 0)
5145                     (sit-for 0)
5146                     (setq building-line-count
5147                           gnus-summary-display-while-building)))
5148               ;; always
5149               (sit-for 0)))
5150         (unless threads
5151           (setq gnus-tmp-level 0)))))
5152   (gnus-message 7 "Generating summary...done"))
5153
5154 (defun gnus-summary-prepare-unthreaded (headers)
5155   "Generate an unthreaded summary buffer based on HEADERS."
5156   (let (header number mark)
5157
5158     (beginning-of-line)
5159
5160     (while headers
5161       ;; We may have to root out some bad articles...
5162       (when (memq (setq number (mail-header-number
5163                                 (setq header (pop headers))))
5164                   gnus-newsgroup-limit)
5165         ;; Mark article as read when it has a low score.
5166         (when (and gnus-summary-mark-below
5167                    (< (or (cdr (assq number gnus-newsgroup-scored))
5168                           gnus-summary-default-score 0)
5169                       gnus-summary-mark-below)
5170                    (not (gnus-summary-article-ancient-p number)))
5171           (setq gnus-newsgroup-unreads
5172                 (delq number gnus-newsgroup-unreads))
5173           (if gnus-newsgroup-auto-expire
5174               (push number gnus-newsgroup-expirable)
5175             (push (cons number gnus-low-score-mark)
5176                   gnus-newsgroup-reads)))
5177
5178         (setq mark (gnus-article-mark number))
5179         (push (gnus-data-make number mark (1+ (point)) header 0)
5180               gnus-newsgroup-data)
5181         (gnus-summary-insert-line
5182          header 0 number
5183          (memq number gnus-newsgroup-undownloaded)
5184          mark (memq number gnus-newsgroup-replied)
5185          (memq number gnus-newsgroup-expirable)
5186          (mail-header-subject header) nil
5187          (cdr (assq number gnus-newsgroup-scored))
5188          (memq number gnus-newsgroup-processable))))))
5189
5190 (defun gnus-summary-remove-list-identifiers ()
5191   "Remove list identifiers in `gnus-list-identifiers' from articles in the current group."
5192   (let ((regexp (if (consp gnus-list-identifiers)
5193                     (mapconcat 'identity gnus-list-identifiers " *\\|")
5194                   gnus-list-identifiers))
5195         changed subject)
5196     (when regexp
5197       (dolist (header gnus-newsgroup-headers)
5198         (setq subject (mail-header-subject header)
5199               changed nil)
5200         (while (string-match
5201                 (concat "^\\(R[Ee]: +\\)*\\(" regexp " *\\)")
5202                 subject)
5203           (setq subject
5204                 (concat (substring subject 0 (match-beginning 2))
5205                         (substring subject (match-end 0)))
5206                 changed t))
5207         (when (and changed
5208                    (string-match
5209                     "^\\(\\(R[Ee]: +\\)+\\)R[Ee]: +" subject))
5210           (setq subject
5211                 (concat (substring subject 0 (match-beginning 1))
5212                         (substring subject (match-end 1)))))
5213         (when changed
5214           (mail-header-set-subject header subject))))))
5215
5216 (defun gnus-fetch-headers (articles)
5217   "Fetch headers of ARTICLES."
5218   (let ((name (gnus-group-decoded-name gnus-newsgroup-name)))
5219     (gnus-message 5 "Fetching headers for %s..." name)
5220     (prog1
5221         (if (eq 'nov
5222                 (setq gnus-headers-retrieved-by
5223                       (gnus-retrieve-headers
5224                        articles gnus-newsgroup-name
5225                        ;; We might want to fetch old headers, but
5226                        ;; not if there is only 1 article.
5227                        (and (or (and
5228                                  (not (eq gnus-fetch-old-headers 'some))
5229                                  (not (numberp gnus-fetch-old-headers)))
5230                                 (> (length articles) 1))
5231                             gnus-fetch-old-headers))))
5232             (gnus-get-newsgroup-headers-xover
5233              articles nil nil gnus-newsgroup-name t)
5234           (gnus-get-newsgroup-headers))
5235       (gnus-message 5 "Fetching headers for %s...done" name))))
5236
5237 (defun gnus-select-newsgroup (group &optional read-all select-articles)
5238   "Select newsgroup GROUP.
5239 If READ-ALL is non-nil, all articles in the group are selected.
5240 If SELECT-ARTICLES, only select those articles from GROUP."
5241   (let* ((entry (gnus-gethash group gnus-newsrc-hashtb))
5242          ;;!!! Dirty hack; should be removed.
5243          (gnus-summary-ignore-duplicates
5244           (if (eq (car (gnus-find-method-for-group group)) 'nnvirtual)
5245               t
5246             gnus-summary-ignore-duplicates))
5247          (info (nth 2 entry))
5248          articles fetched-articles cached)
5249
5250     (unless (gnus-check-server
5251              (set (make-local-variable 'gnus-current-select-method)
5252                   (gnus-find-method-for-group group)))
5253       (error "Couldn't open server"))
5254
5255     (or (and entry (not (eq (car entry) t))) ; Either it's active...
5256         (gnus-activate-group group)     ; Or we can activate it...
5257         (progn                          ; Or we bug out.
5258           (when (equal major-mode 'gnus-summary-mode)
5259             (gnus-kill-buffer (current-buffer)))
5260           (error "Couldn't activate group %s: %s"
5261                  (gnus-group-decoded-name group) (gnus-status-message group))))
5262
5263     (unless (gnus-request-group group t)
5264       (when (equal major-mode 'gnus-summary-mode)
5265         (gnus-kill-buffer (current-buffer)))
5266       (error "Couldn't request group %s: %s"
5267              (gnus-group-decoded-name group) (gnus-status-message group)))
5268
5269     (when gnus-agent
5270       (gnus-agent-possibly-alter-active group (gnus-active group) info)
5271
5272       (setq gnus-summary-use-undownloaded-faces
5273             (gnus-agent-find-parameter
5274              group
5275              'agent-enable-undownloaded-faces)))
5276
5277     (setq gnus-newsgroup-name group
5278           gnus-newsgroup-unselected nil
5279           gnus-newsgroup-unreads (gnus-list-of-unread-articles group))
5280
5281     (let ((display (gnus-group-find-parameter group 'display)))
5282       (setq gnus-newsgroup-display
5283             (cond
5284              ((not (zerop (or (car-safe read-all) 0)))
5285               ;; The user entered the group with C-u SPC/RET, let's show
5286               ;; all articles.
5287               'gnus-not-ignore)
5288              ((eq display 'all)
5289               'gnus-not-ignore)
5290              ((arrayp display)
5291               (gnus-summary-display-make-predicate (mapcar 'identity display)))
5292              ((numberp display)
5293               ;; The following is probably the "correct" solution, but
5294               ;; it makes Gnus fetch all headers and then limit the
5295               ;; articles (which is slow), so instead we hack the
5296               ;; select-articles parameter instead. -- Simon Josefsson
5297               ;; <jas@kth.se>
5298               ;;
5299               ;; (gnus-byte-compile
5300               ;;  `(lambda () (> number ,(- (cdr (gnus-active group))
5301               ;;                         display)))))
5302               (setq select-articles
5303                     (gnus-uncompress-range
5304                      (cons (let ((tmp (- (cdr (gnus-active group)) display)))
5305                              (if (> tmp 0)
5306                                  tmp
5307                                1))
5308                            (cdr (gnus-active group)))))
5309               nil)
5310              (t
5311               nil))))
5312
5313     (gnus-summary-setup-default-charset)
5314
5315     ;; Kludge to avoid having cached articles nixed out in virtual groups.
5316     (when (gnus-virtual-group-p group)
5317       (setq cached gnus-newsgroup-cached))
5318
5319     (setq gnus-newsgroup-unreads
5320           (gnus-sorted-ndifference
5321            (gnus-sorted-ndifference gnus-newsgroup-unreads
5322                                     gnus-newsgroup-marked)
5323            gnus-newsgroup-dormant))
5324
5325     (setq gnus-newsgroup-processable nil)
5326
5327     (gnus-update-read-articles group gnus-newsgroup-unreads)
5328
5329     ;; Adjust and set lists of article marks.
5330     (when info
5331       (gnus-adjust-marked-articles info))
5332     (if (setq articles select-articles)
5333         (setq gnus-newsgroup-unselected
5334               (gnus-sorted-difference gnus-newsgroup-unreads articles))
5335       (setq articles (gnus-articles-to-read group read-all)))
5336
5337     (cond
5338      ((null articles)
5339       ;;(gnus-message 3 "Couldn't select newsgroup -- no articles to display")
5340       'quit)
5341      ((eq articles 0) nil)
5342      (t
5343       ;; Init the dependencies hash table.
5344       (setq gnus-newsgroup-dependencies
5345             (gnus-make-hashtable (length articles)))
5346       (gnus-set-global-variables)
5347       ;; Retrieve the headers and read them in.
5348
5349       (setq gnus-newsgroup-headers (gnus-fetch-headers articles))
5350
5351       ;; Kludge to avoid having cached articles nixed out in virtual groups.
5352       (when cached
5353         (setq gnus-newsgroup-cached cached))
5354
5355       ;; Suppress duplicates?
5356       (when gnus-suppress-duplicates
5357         (gnus-dup-suppress-articles))
5358
5359       ;; Set the initial limit.
5360       (setq gnus-newsgroup-limit (copy-sequence articles))
5361       ;; Remove canceled articles from the list of unread articles.
5362       (setq fetched-articles
5363             (mapcar (lambda (headers) (mail-header-number headers))
5364                     gnus-newsgroup-headers))
5365       (setq gnus-newsgroup-articles fetched-articles)
5366       (setq gnus-newsgroup-unreads
5367             (gnus-sorted-nintersection
5368              gnus-newsgroup-unreads fetched-articles))
5369       (gnus-compute-unseen-list)
5370
5371       ;; Removed marked articles that do not exist.
5372       (gnus-update-missing-marks
5373        (gnus-sorted-difference articles fetched-articles))
5374       ;; We might want to build some more threads first.
5375       (when (and gnus-fetch-old-headers
5376                  (eq gnus-headers-retrieved-by 'nov))
5377         (if (eq gnus-fetch-old-headers 'invisible)
5378             (gnus-build-all-threads)
5379           (gnus-build-old-threads)))
5380       ;; Let the Gnus agent mark articles as read.
5381       (when gnus-agent
5382         (gnus-agent-get-undownloaded-list))
5383       ;; Remove list identifiers from subject
5384       (when gnus-list-identifiers
5385         (gnus-summary-remove-list-identifiers))
5386       ;; Check whether auto-expire is to be done in this group.
5387       (setq gnus-newsgroup-auto-expire
5388             (gnus-group-auto-expirable-p group))
5389       ;; Set up the article buffer now, if necessary.
5390       (unless gnus-single-article-buffer
5391         (gnus-article-setup-buffer))
5392       ;; First and last article in this newsgroup.
5393       (when gnus-newsgroup-headers
5394         (setq gnus-newsgroup-begin
5395               (mail-header-number (car gnus-newsgroup-headers))
5396               gnus-newsgroup-end
5397               (mail-header-number
5398                (gnus-last-element gnus-newsgroup-headers))))
5399       ;; GROUP is successfully selected.
5400       (or gnus-newsgroup-headers t)))))
5401
5402 (defun gnus-compute-unseen-list ()
5403   ;; The `seen' marks are treated specially.
5404   (if (not gnus-newsgroup-seen)
5405       (setq gnus-newsgroup-unseen gnus-newsgroup-articles)
5406     (setq gnus-newsgroup-unseen
5407           (gnus-inverse-list-range-intersection
5408            gnus-newsgroup-articles gnus-newsgroup-seen))))
5409
5410 (defun gnus-summary-display-make-predicate (display)
5411   (require 'gnus-agent)
5412   (when (= (length display) 1)
5413     (setq display (car display)))
5414   (unless gnus-summary-display-cache
5415     (dolist (elem (append '((unread . unread)
5416                             (read . read)
5417                             (unseen . unseen))
5418                           gnus-article-mark-lists))
5419       (push (cons (cdr elem)
5420                   (gnus-byte-compile
5421                    `(lambda () (gnus-article-marked-p ',(cdr elem)))))
5422             gnus-summary-display-cache)))
5423   (let ((gnus-category-predicate-alist gnus-summary-display-cache)
5424         (gnus-category-predicate-cache gnus-summary-display-cache))
5425     (gnus-get-predicate display)))
5426
5427 ;; Uses the dynamically bound `number' variable.
5428 (eval-when-compile
5429   (defvar number))
5430 (defun gnus-article-marked-p (type &optional article)
5431   (let ((article (or article number)))
5432     (cond
5433      ((eq type 'tick)
5434       (memq article gnus-newsgroup-marked))
5435      ((eq type 'spam)
5436       (memq article gnus-newsgroup-spam-marked))
5437      ((eq type 'unsend)
5438       (memq article gnus-newsgroup-unsendable))
5439      ((eq type 'undownload)
5440       (memq article gnus-newsgroup-undownloaded))
5441      ((eq type 'download)
5442       (memq article gnus-newsgroup-downloadable))
5443      ((eq type 'unread)
5444       (memq article gnus-newsgroup-unreads))
5445      ((eq type 'read)
5446       (memq article gnus-newsgroup-reads))
5447      ((eq type 'dormant)
5448       (memq article gnus-newsgroup-dormant) )
5449      ((eq type 'expire)
5450       (memq article gnus-newsgroup-expirable))
5451      ((eq type 'reply)
5452       (memq article gnus-newsgroup-replied))
5453      ((eq type 'killed)
5454       (memq article gnus-newsgroup-killed))
5455      ((eq type 'bookmark)
5456       (assq article gnus-newsgroup-bookmarks))
5457      ((eq type 'score)
5458       (assq article gnus-newsgroup-scored))
5459      ((eq type 'save)
5460       (memq article gnus-newsgroup-saved))
5461      ((eq type 'cache)
5462       (memq article gnus-newsgroup-cached))
5463      ((eq type 'forward)
5464       (memq article gnus-newsgroup-forwarded))
5465      ((eq type 'seen)
5466       (not (memq article gnus-newsgroup-unseen)))
5467      ((eq type 'recent)
5468       (memq article gnus-newsgroup-recent))
5469      (t t))))
5470
5471 (defun gnus-articles-to-read (group &optional read-all)
5472   "Find out what articles the user wants to read."
5473   (let* ((articles
5474           ;; Select all articles if `read-all' is non-nil, or if there
5475           ;; are no unread articles.
5476           (if (or read-all
5477                   (and (zerop (length gnus-newsgroup-marked))
5478                        (zerop (length gnus-newsgroup-unreads)))
5479                   ;; Fetch all if the predicate is non-nil.
5480                   gnus-newsgroup-display)
5481               ;; We want to select the headers for all the articles in
5482               ;; the group, so we select either all the active
5483               ;; articles in the group, or (if that's nil), the
5484               ;; articles in the cache.
5485               (or
5486                (if gnus-newsgroup-maximum-articles
5487                    (let ((active (gnus-active group)))
5488                      (gnus-uncompress-range
5489                       (cons (max (car active)
5490                                  (- (cdr active)
5491                                     gnus-newsgroup-maximum-articles
5492                                     -1))
5493                             (cdr active))))
5494                  (gnus-uncompress-range (gnus-active group)))
5495                (gnus-cache-articles-in-group group))
5496             ;; Select only the "normal" subset of articles.
5497             (gnus-sorted-nunion
5498              (gnus-sorted-union gnus-newsgroup-dormant gnus-newsgroup-marked)
5499              gnus-newsgroup-unreads)))
5500          (scored-list (gnus-killed-articles gnus-newsgroup-killed articles))
5501          (scored (length scored-list))
5502          (number (length articles))
5503          (marked (+ (length gnus-newsgroup-marked)
5504                     (length gnus-newsgroup-dormant)))
5505          (select
5506           (cond
5507            ((numberp read-all)
5508             read-all)
5509            ((numberp gnus-newsgroup-display)
5510             gnus-newsgroup-display)
5511            (t
5512             (condition-case ()
5513                 (cond
5514                  ((and (or (<= scored marked) (= scored number))
5515                        (numberp gnus-large-newsgroup)
5516                        (> number gnus-large-newsgroup))
5517                   (let* ((cursor-in-echo-area nil)
5518                          (initial (gnus-parameter-large-newsgroup-initial
5519                                    gnus-newsgroup-name))
5520                          (input
5521                           (read-string
5522                            (format
5523                             "How many articles from %s (%s %d): "
5524                             (gnus-limit-string
5525                              (gnus-group-decoded-name gnus-newsgroup-name)
5526                              35)
5527                             (if initial "max" "default")
5528                             number)
5529                            (if initial
5530                                (cons (number-to-string initial)
5531                                      0)))))
5532                     (if (string-match "^[ \t]*$" input) number input)))
5533                  ((and (> scored marked) (< scored number)
5534                        (> (- scored number) 20))
5535                   (let ((input
5536                          (read-string
5537                           (format "%s %s (%d scored, %d total): "
5538                                   "How many articles from"
5539                                   (gnus-group-decoded-name group)
5540                                   scored number))))
5541                     (if (string-match "^[ \t]*$" input)
5542                         number input)))
5543                  (t number))
5544               (quit
5545                (message "Quit getting the articles to read")
5546                nil))))))
5547     (setq select (if (stringp select) (string-to-number select) select))
5548     (if (or (null select) (zerop select))
5549         select
5550       (if (and (not (zerop scored)) (<= (abs select) scored))
5551           (progn
5552             (setq articles (sort scored-list '<))
5553             (setq number (length articles)))
5554         (setq articles (copy-sequence articles)))
5555
5556       (when (< (abs select) number)
5557         (if (< select 0)
5558             ;; Select the N oldest articles.
5559             (setcdr (nthcdr (1- (abs select)) articles) nil)
5560           ;; Select the N most recent articles.
5561           (setq articles (nthcdr (- number select) articles))))
5562       (setq gnus-newsgroup-unselected
5563             (gnus-sorted-difference gnus-newsgroup-unreads articles))
5564       (when gnus-alter-articles-to-read-function
5565         (setq articles
5566               (sort
5567                (funcall gnus-alter-articles-to-read-function
5568                         gnus-newsgroup-name articles)
5569                '<)))
5570       articles)))
5571
5572 (defun gnus-killed-articles (killed articles)
5573   (let (out)
5574     (while articles
5575       (when (inline (gnus-member-of-range (car articles) killed))
5576         (push (car articles) out))
5577       (setq articles (cdr articles)))
5578     out))
5579
5580 (defun gnus-uncompress-marks (marks)
5581   "Uncompress the mark ranges in MARKS."
5582   (let ((uncompressed '(score bookmark))
5583         out)
5584     (while marks
5585       (if (memq (caar marks) uncompressed)
5586           (push (car marks) out)
5587         (push (cons (caar marks) (gnus-uncompress-range (cdar marks))) out))
5588       (setq marks (cdr marks)))
5589     out))
5590
5591 (defun gnus-article-mark-to-type (mark)
5592   "Return the type of MARK."
5593   (or (cadr (assq mark gnus-article-special-mark-lists))
5594       'list))
5595
5596 (defun gnus-article-unpropagatable-p (mark)
5597   "Return whether MARK should be propagated to back end."
5598   (memq mark gnus-article-unpropagated-mark-lists))
5599
5600 (defun gnus-adjust-marked-articles (info)
5601   "Set all article lists and remove all marks that are no longer valid."
5602   (let* ((marked-lists (gnus-info-marks info))
5603          (active (gnus-active (gnus-info-group info)))
5604          (min (car active))
5605          (max (cdr active))
5606          (types gnus-article-mark-lists)
5607          marks var articles article mark mark-type
5608          bgn end)
5609
5610     (dolist (marks marked-lists)
5611       (setq mark (car marks)
5612             mark-type (gnus-article-mark-to-type mark)
5613             var (intern (format "gnus-newsgroup-%s" (car (rassq mark types)))))
5614
5615       ;; We set the variable according to the type of the marks list,
5616       ;; and then adjust the marks to a subset of the active articles.
5617       (cond
5618        ;; Adjust "simple" lists - compressed yet unsorted
5619        ((eq mark-type 'list)
5620         ;; Simultaneously uncompress and clip to active range
5621         ;; See gnus-uncompress-range for a description of possible marks
5622         (let (l lh)
5623           (if (not (cadr marks))
5624               (set var nil)
5625             (setq articles (if (numberp (cddr marks))
5626                                (list (cdr marks))
5627                              (cdr marks))
5628                   lh (cons nil nil)
5629                   l lh)
5630
5631             (while (setq article (pop articles))
5632               (cond ((consp article)
5633                      (setq bgn (max (car article) min)
5634                            end (min (cdr article) max))
5635                      (while (<= bgn end)
5636                        (setq l (setcdr l (cons bgn nil))
5637                              bgn (1+ bgn))))
5638                     ((and (<= min article)
5639                           (>= max article))
5640                      (setq l (setcdr l (cons article nil))))))
5641             (set var (cdr lh)))))
5642        ;; Adjust assocs.
5643        ((eq mark-type 'tuple)
5644         (set var (setq articles (cdr marks)))
5645         (when (not (listp (cdr (symbol-value var))))
5646           (set var (list (symbol-value var))))
5647         (when (not (listp (cdr articles)))
5648           (setq articles (list articles)))
5649         (while articles
5650           (when (or (not (consp (setq article (pop articles))))
5651                     (< (car article) min)
5652                     (> (car article) max))
5653             (set var (delq article (symbol-value var))))))
5654        ;; Adjust ranges (sloppily).
5655        ((eq mark-type 'range)
5656         (cond
5657          ((eq mark 'seen)
5658           ;; Fix the record for `seen' if it looks like (seen NUM1 . NUM2).
5659           ;; It should be (seen (NUM1 . NUM2)).
5660           (when (numberp (cddr marks))
5661             (setcdr marks (list (cdr marks))))
5662           (setq articles (cdr marks))
5663           (while (and articles
5664                       (or (and (consp (car articles))
5665                                (> min (cdar articles)))
5666                           (and (numberp (car articles))
5667                                (> min (car articles)))))
5668             (pop articles))
5669           (set var articles))))))))
5670
5671 (defun gnus-update-missing-marks (missing)
5672   "Go through the list of MISSING articles and remove them from the mark lists."
5673   (when missing
5674     (let (var m)
5675       ;; Go through all types.
5676       (dolist (elem gnus-article-mark-lists)
5677         (when (eq (gnus-article-mark-to-type (cdr elem)) 'list)
5678           (setq var (intern (format "gnus-newsgroup-%s" (car elem))))
5679           (when (symbol-value var)
5680             ;; This list has articles.  So we delete all missing
5681             ;; articles from it.
5682             (setq m missing)
5683             (while m
5684               (set var (delq (pop m) (symbol-value var))))))))))
5685
5686 (defun gnus-update-marks ()
5687   "Enter the various lists of marked articles into the newsgroup info list."
5688   (let ((types gnus-article-mark-lists)
5689         (info (gnus-get-info gnus-newsgroup-name))
5690         type list newmarked symbol delta-marks)
5691     (when info
5692       ;; Add all marks lists to the list of marks lists.
5693       (while (setq type (pop types))
5694         (setq list (symbol-value
5695                     (setq symbol
5696                           (intern (format "gnus-newsgroup-%s" (car type))))))
5697
5698         (when list
5699           ;; Get rid of the entries of the articles that have the
5700           ;; default score.
5701           (when (and (eq (cdr type) 'score)
5702                      gnus-save-score
5703                      list)
5704             (let* ((arts list)
5705                    (prev (cons nil list))
5706                    (all prev))
5707               (while arts
5708                 (if (or (not (consp (car arts)))
5709                         (= (cdar arts) gnus-summary-default-score))
5710                     (setcdr prev (cdr arts))
5711                   (setq prev arts))
5712                 (setq arts (cdr arts)))
5713               (setq list (cdr all)))))
5714
5715         (when (eq (cdr type) 'seen)
5716           (setq list (gnus-range-add list gnus-newsgroup-unseen)))
5717
5718         (when (eq (gnus-article-mark-to-type (cdr type)) 'list)
5719           (setq list (gnus-compress-sequence (set symbol (sort list '<)) t)))
5720
5721         (when (and (gnus-check-backend-function
5722                     'request-set-mark gnus-newsgroup-name)
5723                    (not (gnus-article-unpropagatable-p (cdr type))))
5724           (let* ((old (cdr (assq (cdr type) (gnus-info-marks info))))
5725                  (del (gnus-remove-from-range (gnus-copy-sequence old) list))
5726                  (add (gnus-remove-from-range
5727                        (gnus-copy-sequence list) old)))
5728             (when add
5729               (push (list add 'add (list (cdr type))) delta-marks))
5730             (when del
5731               (push (list del 'del (list (cdr type))) delta-marks))))
5732
5733         (when list
5734           (push (cons (cdr type) list) newmarked)))
5735
5736       (when delta-marks
5737         (unless (gnus-check-group gnus-newsgroup-name)
5738           (error "Can't open server for %s" gnus-newsgroup-name))
5739         (gnus-request-set-mark gnus-newsgroup-name delta-marks))
5740
5741       ;; Enter these new marks into the info of the group.
5742       (if (nthcdr 3 info)
5743           (setcar (nthcdr 3 info) newmarked)
5744         ;; Add the marks lists to the end of the info.
5745         (when newmarked
5746           (setcdr (nthcdr 2 info) (list newmarked))))
5747
5748       ;; Cut off the end of the info if there's nothing else there.
5749       (let ((i 5))
5750         (while (and (> i 2)
5751                     (not (nth i info)))
5752           (when (nthcdr (decf i) info)
5753             (setcdr (nthcdr i info) nil)))))))
5754
5755 (defun gnus-set-mode-line (where)
5756   "Set the mode line of the article or summary buffers.
5757 If WHERE is `summary', the summary mode line format will be used."
5758   ;; Is this mode line one we keep updated?
5759   (when (and (memq where gnus-updated-mode-lines)
5760              (symbol-value
5761               (intern (format "gnus-%s-mode-line-format-spec" where))))
5762     (let (mode-string)
5763       (save-excursion
5764         ;; We evaluate this in the summary buffer since these
5765         ;; variables are buffer-local to that buffer.
5766         (set-buffer gnus-summary-buffer)
5767        ;; We bind all these variables that are used in the `eval' form
5768         ;; below.
5769         (let* ((mformat (symbol-value
5770                          (intern
5771                           (format "gnus-%s-mode-line-format-spec" where))))
5772                (gnus-tmp-group-name (gnus-mode-string-quote
5773                                      (gnus-group-decoded-name
5774                                       gnus-newsgroup-name)))
5775                (gnus-tmp-article-number (or gnus-current-article 0))
5776                (gnus-tmp-unread gnus-newsgroup-unreads)
5777                (gnus-tmp-unread-and-unticked (length gnus-newsgroup-unreads))
5778                (gnus-tmp-unselected (length gnus-newsgroup-unselected))
5779                (gnus-tmp-unread-and-unselected
5780                 (cond ((and (zerop gnus-tmp-unread-and-unticked)
5781                             (zerop gnus-tmp-unselected))
5782                        "")
5783                       ((zerop gnus-tmp-unselected)
5784                        (format "{%d more}" gnus-tmp-unread-and-unticked))
5785                       (t (format "{%d(+%d) more}"
5786                                  gnus-tmp-unread-and-unticked
5787                                  gnus-tmp-unselected))))
5788                (gnus-tmp-subject
5789                 (if (and gnus-current-headers
5790                          (vectorp gnus-current-headers))
5791                     (gnus-mode-string-quote
5792                      (mail-header-subject gnus-current-headers))
5793                   ""))
5794                bufname-length max-len
5795                gnus-tmp-header) ;; passed as argument to any user-format-funcs
5796           (setq mode-string (eval mformat))
5797           (setq bufname-length (if (string-match "%b" mode-string)
5798                                    (- (length
5799                                        (buffer-name
5800                                         (if (eq where 'summary)
5801                                             nil
5802                                           (get-buffer gnus-article-buffer))))
5803                                       2)
5804                                  0))
5805           (setq max-len (max 4 (if gnus-mode-non-string-length
5806                                    (- (window-width)
5807                                       gnus-mode-non-string-length
5808                                       bufname-length)
5809                                  (length mode-string))))
5810           ;; We might have to chop a bit of the string off...
5811           (when (> (length mode-string) max-len)
5812             (setq mode-string
5813                   (concat (truncate-string-to-width mode-string (- max-len 3))
5814                           "...")))
5815           ;; Pad the mode string a bit.
5816           (setq mode-string (format (format "%%-%ds" max-len) mode-string))))
5817       ;; Update the mode line.
5818       (setq mode-line-buffer-identification
5819             (gnus-mode-line-buffer-identification (list mode-string)))
5820       (set-buffer-modified-p t))))
5821
5822 (defun gnus-create-xref-hashtb (from-newsgroup headers unreads)
5823   "Go through the HEADERS list and add all Xrefs to a hash table.
5824 The resulting hash table is returned, or nil if no Xrefs were found."
5825   (let* ((virtual (gnus-virtual-group-p from-newsgroup))
5826          (prefix (if virtual "" (gnus-group-real-prefix from-newsgroup)))
5827          (xref-hashtb (gnus-make-hashtable))
5828          start group entry number xrefs header)
5829     (while headers
5830       (setq header (pop headers))
5831       (when (and (setq xrefs (mail-header-xref header))
5832                  (not (memq (setq number (mail-header-number header))
5833                             unreads)))
5834         (setq start 0)
5835         (while (string-match "\\([^ ]+\\)[:/]\\([0-9]+\\)" xrefs start)
5836           (setq start (match-end 0))
5837           (setq group (if prefix
5838                           (concat prefix (substring xrefs (match-beginning 1)
5839                                                     (match-end 1)))
5840                         (substring xrefs (match-beginning 1) (match-end 1))))
5841           (setq number
5842                 (string-to-number (substring xrefs (match-beginning 2)
5843                                           (match-end 2))))
5844           (if (setq entry (gnus-gethash group xref-hashtb))
5845               (setcdr entry (cons number (cdr entry)))
5846             (gnus-sethash group (cons number nil) xref-hashtb)))))
5847     (and start xref-hashtb)))
5848
5849 (defun gnus-mark-xrefs-as-read (from-newsgroup headers unreads)
5850   "Look through all the headers and mark the Xrefs as read."
5851   (let ((virtual (gnus-virtual-group-p from-newsgroup))
5852         name entry info xref-hashtb idlist method nth4)
5853     (save-excursion
5854       (set-buffer gnus-group-buffer)
5855       (when (setq xref-hashtb
5856                   (gnus-create-xref-hashtb from-newsgroup headers unreads))
5857         (mapatoms
5858          (lambda (group)
5859            (unless (string= from-newsgroup (setq name (symbol-name group)))
5860              (setq idlist (symbol-value group))
5861              ;; Dead groups are not updated.
5862              (and (prog1
5863                       (setq entry (gnus-gethash name gnus-newsrc-hashtb)
5864                             info (nth 2 entry))
5865                     (when (stringp (setq nth4 (gnus-info-method info)))
5866                       (setq nth4 (gnus-server-to-method nth4))))
5867                   ;; Only do the xrefs if the group has the same
5868                   ;; select method as the group we have just read.
5869                   (or (gnus-methods-equal-p
5870                        nth4 (gnus-find-method-for-group from-newsgroup))
5871                       virtual
5872                       (equal nth4 (setq method (gnus-find-method-for-group
5873                                                 from-newsgroup)))
5874                       (and (equal (car nth4) (car method))
5875                            (equal (nth 1 nth4) (nth 1 method))))
5876                   gnus-use-cross-reference
5877                   (or (not (eq gnus-use-cross-reference t))
5878                       virtual
5879                       ;; Only do cross-references on subscribed
5880                       ;; groups, if that is what is wanted.
5881                       (<= (gnus-info-level info) gnus-level-subscribed))
5882                   (gnus-group-make-articles-read name idlist))))
5883          xref-hashtb)))))
5884
5885 (defun gnus-compute-read-articles (group articles)
5886   (let* ((entry (gnus-gethash group gnus-newsrc-hashtb))
5887          (info (nth 2 entry))
5888          (active (gnus-active group))
5889          ninfo)
5890     (when entry
5891       ;; First peel off all invalid article numbers.
5892       (when active
5893         (let ((ids articles)
5894               id first)
5895           (while (setq id (pop ids))
5896             (when (and first (> id (cdr active)))
5897               ;; We'll end up in this situation in one particular
5898               ;; obscure situation.  If you re-scan a group and get
5899               ;; a new article that is cross-posted to a different
5900               ;; group that has not been re-scanned, you might get
5901               ;; crossposted article that has a higher number than
5902               ;; Gnus believes possible.  So we re-activate this
5903               ;; group as well.  This might mean doing the
5904               ;; crossposting thingy will *increase* the number
5905               ;; of articles in some groups.  Tsk, tsk.
5906               (setq active (or (gnus-activate-group group) active)))
5907             (when (or (> id (cdr active))
5908                       (< id (car active)))
5909               (setq articles (delq id articles))))))
5910       ;; If the read list is nil, we init it.
5911       (if (and active
5912                (null (gnus-info-read info))
5913                (> (car active) 1))
5914           (setq ninfo (cons 1 (1- (car active))))
5915         (setq ninfo (gnus-info-read info)))
5916       ;; Then we add the read articles to the range.
5917       (gnus-add-to-range
5918        ninfo (setq articles (sort articles '<))))))
5919
5920 (defun gnus-group-make-articles-read (group articles)
5921   "Update the info of GROUP to say that ARTICLES are read."
5922   (let* ((num 0)
5923          (entry (gnus-gethash group gnus-newsrc-hashtb))
5924          (info (nth 2 entry))
5925          (active (gnus-active group))
5926          range)
5927     (when entry
5928       (setq range (gnus-compute-read-articles group articles))
5929       (save-excursion
5930         (set-buffer gnus-group-buffer)
5931         (gnus-undo-register
5932           `(progn
5933              (gnus-info-set-marks ',info ',(gnus-info-marks info) t)
5934              (gnus-info-set-read ',info ',(gnus-info-read info))
5935              (gnus-get-unread-articles-in-group ',info (gnus-active ,group))
5936              (gnus-request-set-mark ,group (list (list ',range 'del '(read))))
5937              (gnus-group-update-group ,group t))))
5938       ;; Add the read articles to the range.
5939       (gnus-info-set-read info range)
5940       (gnus-request-set-mark group (list (list range 'add '(read))))
5941       ;; Then we have to re-compute how many unread
5942       ;; articles there are in this group.
5943       (when active
5944         (cond
5945          ((not range)
5946           (setq num (- (1+ (cdr active)) (car active))))
5947          ((not (listp (cdr range)))
5948           (setq num (- (cdr active) (- (1+ (cdr range))
5949                                        (car range)))))
5950          (t
5951           (while range
5952             (if (numberp (car range))
5953                 (setq num (1+ num))
5954               (setq num (+ num (- (1+ (cdar range)) (caar range)))))
5955             (setq range (cdr range)))
5956           (setq num (- (cdr active) num))))
5957         ;; Update the number of unread articles.
5958         (setcar entry num)
5959         ;; Update the group buffer.
5960         (unless (gnus-ephemeral-group-p group)
5961           (gnus-group-update-group group t))))))
5962
5963 (defvar gnus-newsgroup-none-id 0)
5964
5965 (defun gnus-get-newsgroup-headers (&optional dependencies force-new)
5966   (let ((cur nntp-server-buffer)
5967         (dependencies
5968          (or dependencies
5969              (save-excursion (set-buffer gnus-summary-buffer)
5970                              gnus-newsgroup-dependencies)))
5971         headers id end ref
5972         (mail-parse-charset gnus-newsgroup-charset)
5973         (mail-parse-ignored-charsets
5974          (save-excursion (condition-case nil
5975                              (set-buffer gnus-summary-buffer)
5976                            (error))
5977                          gnus-newsgroup-ignored-charsets)))
5978     (save-excursion
5979       (set-buffer nntp-server-buffer)
5980       ;; Translate all TAB characters into SPACE characters.
5981       (subst-char-in-region (point-min) (point-max) ?\t ?  t)
5982       (subst-char-in-region (point-min) (point-max) ?\r ?  t)
5983       (ietf-drums-unfold-fws)
5984       (gnus-run-hooks 'gnus-parse-headers-hook)
5985       (let ((case-fold-search t)
5986             in-reply-to header p lines chars)
5987         (goto-char (point-min))
5988         ;; Search to the beginning of the next header.  Error messages
5989         ;; do not begin with 2 or 3.
5990         (while (re-search-forward "^[23][0-9]+ " nil t)
5991           (setq id nil
5992                 ref nil)
5993           ;; This implementation of this function, with nine
5994           ;; search-forwards instead of the one re-search-forward and
5995           ;; a case (which basically was the old function) is actually
5996           ;; about twice as fast, even though it looks messier.  You
5997           ;; can't have everything, I guess.  Speed and elegance
5998           ;; doesn't always go hand in hand.
5999           (setq
6000            header
6001            (vector
6002             ;; Number.
6003             (prog1
6004                 (read cur)
6005               (end-of-line)
6006               (setq p (point))
6007               (narrow-to-region (point)
6008                                 (or (and (search-forward "\n.\n" nil t)
6009                                          (- (point) 2))
6010                                     (point))))
6011             ;; Subject.
6012             (progn
6013               (goto-char p)
6014               (if (search-forward "\nsubject:" nil t)
6015                   (funcall gnus-decode-encoded-word-function
6016                            (nnheader-header-value))
6017                 "(none)"))
6018             ;; From.
6019             (progn
6020               (goto-char p)
6021               (if (search-forward "\nfrom:" nil t)
6022                   (funcall gnus-decode-encoded-address-function
6023                            (nnheader-header-value))
6024                 "(nobody)"))
6025             ;; Date.
6026             (progn
6027               (goto-char p)
6028               (if (search-forward "\ndate:" nil t)
6029                   (nnheader-header-value) ""))
6030             ;; Message-ID.
6031             (progn
6032               (goto-char p)
6033               (setq id (if (re-search-forward
6034                             "^message-id: *\\(<[^\n\t> ]+>\\)" nil t)
6035                            ;; We do it this way to make sure the Message-ID
6036                            ;; is (somewhat) syntactically valid.
6037                            (buffer-substring (match-beginning 1)
6038                                              (match-end 1))
6039                          ;; If there was no message-id, we just fake one
6040                          ;; to make subsequent routines simpler.
6041                          (nnheader-generate-fake-message-id))))
6042             ;; References.
6043             (progn
6044               (goto-char p)
6045               (if (search-forward "\nreferences:" nil t)
6046                   (progn
6047                     (setq end (point))
6048                     (prog1
6049                         (nnheader-header-value)
6050                       (setq ref
6051                             (buffer-substring
6052                              (progn
6053                                (end-of-line)
6054                                (search-backward ">" end t)
6055                                (1+ (point)))
6056                              (progn
6057                                (search-backward "<" end t)
6058                                (point))))))
6059                 ;; Get the references from the in-reply-to header if there
6060                 ;; were no references and the in-reply-to header looks
6061                 ;; promising.
6062                 (if (and (search-forward "\nin-reply-to:" nil t)
6063                          (setq in-reply-to (nnheader-header-value))
6064                          (string-match "<[^>]+>" in-reply-to))
6065                     (let (ref2)
6066                       (setq ref (substring in-reply-to (match-beginning 0)
6067                                            (match-end 0)))
6068                       (while (string-match "<[^>]+>" in-reply-to (match-end 0))
6069                         (setq ref2 (substring in-reply-to (match-beginning 0)
6070                                               (match-end 0)))
6071                         (when (> (length ref2) (length ref))
6072                           (setq ref ref2)))
6073                       ref)
6074                   (setq ref nil))))
6075             ;; Chars.
6076             (progn
6077               (goto-char p)
6078               (if (search-forward "\nchars: " nil t)
6079                   (if (numberp (setq chars (ignore-errors (read cur))))
6080                       chars -1)
6081                 -1))
6082             ;; Lines.
6083             (progn
6084               (goto-char p)
6085               (if (search-forward "\nlines: " nil t)
6086                   (if (numberp (setq lines (ignore-errors (read cur))))
6087                       lines -1)
6088                 -1))
6089             ;; Xref.
6090             (progn
6091               (goto-char p)
6092               (and (search-forward "\nxref:" nil t)
6093                    (nnheader-header-value)))
6094             ;; Extra.
6095             (when gnus-extra-headers
6096               (let ((extra gnus-extra-headers)
6097                     out)
6098                 (while extra
6099                   (goto-char p)
6100                   (when (search-forward
6101                          (concat "\n" (symbol-name (car extra)) ":") nil t)
6102                     (push (cons (car extra) (nnheader-header-value))
6103                           out))
6104                   (pop extra))
6105                 out))))
6106           (when (equal id ref)
6107             (setq ref nil))
6108
6109           (when gnus-alter-header-function
6110             (funcall gnus-alter-header-function header)
6111             (setq id (mail-header-id header)
6112                   ref (gnus-parent-id (mail-header-references header))))
6113
6114           (when (setq header
6115                       (gnus-dependencies-add-header
6116                        header dependencies force-new))
6117             (push header headers))
6118           (goto-char (point-max))
6119           (widen))
6120         (nreverse headers)))))
6121
6122 ;; Goes through the xover lines and returns a list of vectors
6123 (defun gnus-get-newsgroup-headers-xover (sequence &optional
6124                                                   force-new dependencies
6125                                                   group also-fetch-heads)
6126   "Parse the news overview data in the server buffer.
6127 Return a list of headers that match SEQUENCE (see
6128 `nntp-retrieve-headers')."
6129   ;; Get the Xref when the users reads the articles since most/some
6130   ;; NNTP servers do not include Xrefs when using XOVER.
6131   (setq gnus-article-internal-prepare-hook '(gnus-article-get-xrefs))
6132   (let ((mail-parse-charset gnus-newsgroup-charset)
6133         (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets)
6134         (cur nntp-server-buffer)
6135         (dependencies (or dependencies gnus-newsgroup-dependencies))
6136         (allp (cond
6137                ((eq gnus-read-all-available-headers t)
6138                 t)
6139                ((and (stringp gnus-read-all-available-headers)
6140                      group)
6141                 (string-match gnus-read-all-available-headers group))
6142                (t
6143                 nil)))
6144         number headers header)
6145     (save-excursion
6146       (set-buffer nntp-server-buffer)
6147       (subst-char-in-region (point-min) (point-max) ?\r ?  t)
6148       ;; Allow the user to mangle the headers before parsing them.
6149       (gnus-run-hooks 'gnus-parse-headers-hook)
6150       (goto-char (point-min))
6151       (gnus-parse-without-error
6152         (while (and (or sequence allp)
6153                     (not (eobp)))
6154           (setq number (read cur))
6155           (when (not allp)
6156             (while (and sequence
6157                         (< (car sequence) number))
6158               (setq sequence (cdr sequence))))
6159           (when (and (or allp
6160                          (and sequence
6161                               (eq number (car sequence))))
6162                      (progn
6163                        (setq sequence (cdr sequence))
6164                        (setq header (inline
6165                                       (gnus-nov-parse-line
6166                                        number dependencies force-new)))))
6167             (push header headers))
6168           (forward-line 1)))
6169       ;; A common bug in inn is that if you have posted an article and
6170       ;; then retrieves the active file, it will answer correctly --
6171       ;; the new article is included.  However, a NOV entry for the
6172       ;; article may not have been generated yet, so this may fail.
6173       ;; We work around this problem by retrieving the last few
6174       ;; headers using HEAD.
6175       (if (or (not also-fetch-heads)
6176               (not sequence))
6177           ;; We (probably) got all the headers.
6178           (nreverse headers)
6179         (let ((gnus-nov-is-evil t))
6180           (nconc
6181            (nreverse headers)
6182            (when (eq (gnus-retrieve-headers sequence group) 'headers)
6183              (gnus-get-newsgroup-headers))))))))
6184
6185 (defun gnus-article-get-xrefs ()
6186   "Fill in the Xref value in `gnus-current-headers', if necessary.
6187 This is meant to be called in `gnus-article-internal-prepare-hook'."
6188   (let ((headers (save-excursion (set-buffer gnus-summary-buffer)
6189                                  gnus-current-headers)))
6190     (or (not gnus-use-cross-reference)
6191         (not headers)
6192         (and (mail-header-xref headers)
6193              (not (string= (mail-header-xref headers) "")))
6194         (let ((case-fold-search t)
6195               xref)
6196           (save-restriction
6197             (nnheader-narrow-to-headers)
6198             (goto-char (point-min))
6199             (when (or (and (not (eobp))
6200                            (eq (downcase (char-after)) ?x)
6201                            (looking-at "Xref:"))
6202                       (search-forward "\nXref:" nil t))
6203               (goto-char (1+ (match-end 0)))
6204               (setq xref (buffer-substring (point) (gnus-point-at-eol)))
6205               (mail-header-set-xref headers xref)))))))
6206
6207 (defun gnus-summary-insert-subject (id &optional old-header use-old-header)
6208   "Find article ID and insert the summary line for that article.
6209 OLD-HEADER can either be a header or a line number to insert
6210 the subject line on."
6211   (let* ((line (and (numberp old-header) old-header))
6212          (old-header (and (vectorp old-header) old-header))
6213          (header (cond ((and old-header use-old-header)
6214                         old-header)
6215                        ((and (numberp id)
6216                              (gnus-number-to-header id))
6217                         (gnus-number-to-header id))
6218                        (t
6219                         (gnus-read-header id))))
6220          (number (and (numberp id) id))
6221          d)
6222     (when header
6223       ;; Rebuild the thread that this article is part of and go to the
6224       ;; article we have fetched.
6225       (when (and (not gnus-show-threads)
6226                  old-header)
6227         (when (and number
6228                    (setq d (gnus-data-find (mail-header-number old-header))))
6229           (goto-char (gnus-data-pos d))
6230           (gnus-data-remove
6231            number
6232            (- (gnus-point-at-bol)
6233               (prog1
6234                   (1+ (gnus-point-at-eol))
6235                 (gnus-delete-line))))))
6236       ;; Remove list identifiers from subject.
6237       (when gnus-list-identifiers
6238         (let ((gnus-newsgroup-headers (list header)))
6239           (gnus-summary-remove-list-identifiers)))
6240       (when old-header
6241         (mail-header-set-number header (mail-header-number old-header)))
6242       (setq gnus-newsgroup-sparse
6243             (delq (setq number (mail-header-number header))
6244                   gnus-newsgroup-sparse))
6245       (setq gnus-newsgroup-ancient (delq number gnus-newsgroup-ancient))
6246       (push number gnus-newsgroup-limit)
6247       (gnus-rebuild-thread (mail-header-id header) line)
6248       (gnus-summary-goto-subject number nil t))
6249     (when (and (numberp number)
6250                (> number 0))
6251       ;; We have to update the boundaries even if we can't fetch the
6252       ;; article if ID is a number -- so that the next `P' or `N'
6253       ;; command will fetch the previous (or next) article even
6254       ;; if the one we tried to fetch this time has been canceled.
6255       (when (> number gnus-newsgroup-end)
6256         (setq gnus-newsgroup-end number))
6257       (when (< number gnus-newsgroup-begin)
6258         (setq gnus-newsgroup-begin number))
6259       (setq gnus-newsgroup-unselected
6260             (delq number gnus-newsgroup-unselected)))
6261     ;; Report back a success?
6262     (and header (mail-header-number header))))
6263
6264 ;;; Process/prefix in the summary buffer
6265
6266 (defun gnus-summary-work-articles (n)
6267   "Return a list of articles to be worked upon.
6268 The prefix argument, the list of process marked articles, and the
6269 current article will be taken into consideration."
6270   (save-excursion
6271     (set-buffer gnus-summary-buffer)
6272     (cond
6273      (n
6274       ;; A numerical prefix has been given.
6275       (setq n (prefix-numeric-value n))
6276       (let ((backward (< n 0))
6277             (n (abs (prefix-numeric-value n)))
6278             articles article)
6279         (save-excursion
6280           (while
6281               (and (> n 0)
6282                    (push (setq article (gnus-summary-article-number))
6283                          articles)
6284                    (if backward
6285                        (gnus-summary-find-prev nil article)
6286                      (gnus-summary-find-next nil article)))
6287             (decf n)))
6288         (nreverse articles)))
6289      ((and (gnus-region-active-p) (mark))
6290       (message "region active")
6291       ;; Work on the region between point and mark.
6292       (let ((max (max (point) (mark)))
6293             articles article)
6294         (save-excursion
6295           (goto-char (min (point) (mark)))
6296           (while
6297               (and
6298                (push (setq article (gnus-summary-article-number)) articles)
6299                (gnus-summary-find-next nil article)
6300                (< (point) max)))
6301           (nreverse articles))))
6302      (gnus-newsgroup-processable
6303       ;; There are process-marked articles present.
6304       ;; Save current state.
6305       (gnus-summary-save-process-mark)
6306       ;; Return the list.
6307       (reverse gnus-newsgroup-processable))
6308      (t
6309       ;; Just return the current article.
6310       (list (gnus-summary-article-number))))))
6311
6312 (defmacro gnus-summary-iterate (arg &rest forms)
6313   "Iterate over the process/prefixed articles and do FORMS.
6314 ARG is the interactive prefix given to the command.  FORMS will be
6315 executed with point over the summary line of the articles."
6316   (let ((articles (make-symbol "gnus-summary-iterate-articles")))
6317     `(let ((,articles (gnus-summary-work-articles ,arg)))
6318        (while ,articles
6319          (gnus-summary-goto-subject (car ,articles))
6320          ,@forms
6321          (pop ,articles)))))
6322
6323 (put 'gnus-summary-iterate 'lisp-indent-function 1)
6324 (put 'gnus-summary-iterate 'edebug-form-spec '(form body))
6325
6326 (defun gnus-summary-save-process-mark ()
6327   "Push the current set of process marked articles on the stack."
6328   (interactive)
6329   (push (copy-sequence gnus-newsgroup-processable)
6330         gnus-newsgroup-process-stack))
6331
6332 (defun gnus-summary-kill-process-mark ()
6333   "Push the current set of process marked articles on the stack and unmark."
6334   (interactive)
6335   (gnus-summary-save-process-mark)
6336   (gnus-summary-unmark-all-processable))
6337
6338 (defun gnus-summary-yank-process-mark ()
6339   "Pop the last process mark state off the stack and restore it."
6340   (interactive)
6341   (unless gnus-newsgroup-process-stack
6342     (error "Empty mark stack"))
6343   (gnus-summary-process-mark-set (pop gnus-newsgroup-process-stack)))
6344
6345 (defun gnus-summary-process-mark-set (set)
6346   "Make SET into the current process marked articles."
6347   (gnus-summary-unmark-all-processable)
6348   (while set
6349     (gnus-summary-set-process-mark (pop set))))
6350
6351 ;;; Searching and stuff
6352
6353 (defun gnus-summary-search-group (&optional backward use-level)
6354   "Search for next unread newsgroup.
6355 If optional argument BACKWARD is non-nil, search backward instead."
6356   (save-excursion
6357     (set-buffer gnus-group-buffer)
6358     (when (gnus-group-search-forward
6359            backward nil (if use-level (gnus-group-group-level) nil))
6360       (gnus-group-group-name))))
6361
6362 (defun gnus-summary-best-group (&optional exclude-group)
6363   "Find the name of the best unread group.
6364 If EXCLUDE-GROUP, do not go to this group."
6365   (save-excursion
6366     (set-buffer gnus-group-buffer)
6367     (save-excursion
6368       (gnus-group-best-unread-group exclude-group))))
6369
6370 (defun gnus-summary-find-next (&optional unread article backward)
6371   (if backward
6372       (gnus-summary-find-prev unread article)
6373     (let* ((dummy (gnus-summary-article-intangible-p))
6374            (article (or article (gnus-summary-article-number)))
6375            (data (gnus-data-find-list article))
6376            result)
6377       (when (and (not dummy)
6378                  (or (not gnus-summary-check-current)
6379                      (not unread)
6380                      (not (gnus-data-unread-p (car data)))))
6381         (setq data (cdr data)))
6382       (when (setq result
6383                   (if unread
6384                       (progn
6385                         (while data
6386                           (unless (memq (gnus-data-number (car data))
6387                                         (cond
6388                                          ((eq gnus-auto-goto-ignores
6389                                               'always-undownloaded)
6390                                           gnus-newsgroup-undownloaded)
6391                                          (gnus-plugged
6392                                           nil)
6393                                          ((eq gnus-auto-goto-ignores
6394                                               'unfetched)
6395                                           gnus-newsgroup-unfetched)
6396                                          ((eq gnus-auto-goto-ignores
6397                                               'undownloaded)
6398                                           gnus-newsgroup-undownloaded)))
6399                             (when (gnus-data-unread-p (car data))
6400                               (setq result (car data)
6401                                     data nil)))
6402                           (setq data (cdr data)))
6403                         result)
6404                     (car data)))
6405         (goto-char (gnus-data-pos result))
6406         (gnus-data-number result)))))
6407
6408 (defun gnus-summary-find-prev (&optional unread article)
6409   (let* ((eobp (eobp))
6410          (article (or article (gnus-summary-article-number)))
6411          (data (gnus-data-find-list article (gnus-data-list 'rev)))
6412          result)
6413     (when (and (not eobp)
6414                (or (not gnus-summary-check-current)
6415                    (not unread)
6416                    (not (gnus-data-unread-p (car data)))))
6417       (setq data (cdr data)))
6418     (when (setq result
6419                 (if unread
6420                     (progn
6421                       (while data
6422                         (unless (memq (gnus-data-number (car data))
6423                                       (cond
6424                                        ((eq gnus-auto-goto-ignores
6425                                             'always-undownloaded)
6426                                         gnus-newsgroup-undownloaded)
6427                                        (gnus-plugged
6428                                         nil)
6429                                        ((eq gnus-auto-goto-ignores
6430                                             'unfetched)
6431                                         gnus-newsgroup-unfetched)
6432                                        ((eq gnus-auto-goto-ignores
6433                                             'undownloaded)
6434                                         gnus-newsgroup-undownloaded)))
6435                           (when (gnus-data-unread-p (car data))
6436                             (setq result (car data)
6437                                   data nil)))
6438                         (setq data (cdr data)))
6439                       result)
6440                   (car data)))
6441       (goto-char (gnus-data-pos result))
6442       (gnus-data-number result))))
6443
6444 (defun gnus-summary-find-subject (subject &optional unread backward article)
6445   (let* ((simp-subject (gnus-simplify-subject-fully subject))
6446          (article (or article (gnus-summary-article-number)))
6447          (articles (gnus-data-list backward))
6448          (arts (gnus-data-find-list article articles))
6449          result)
6450     (when (or (not gnus-summary-check-current)
6451               (not unread)
6452               (not (gnus-data-unread-p (car arts))))
6453       (setq arts (cdr arts)))
6454     (while arts
6455       (and (or (not unread)
6456                (gnus-data-unread-p (car arts)))
6457            (vectorp (gnus-data-header (car arts)))
6458            (gnus-subject-equal
6459             simp-subject (mail-header-subject (gnus-data-header (car arts))) t)
6460            (setq result (car arts)
6461                  arts nil))
6462       (setq arts (cdr arts)))
6463     (and result
6464          (goto-char (gnus-data-pos result))
6465          (gnus-data-number result))))
6466
6467 (defun gnus-summary-search-forward (&optional unread subject backward)
6468   "Search forward for an article.
6469 If UNREAD, look for unread articles.  If SUBJECT, look for
6470 articles with that subject.  If BACKWARD, search backward instead."
6471   (cond (subject (gnus-summary-find-subject subject unread backward))
6472         (backward (gnus-summary-find-prev unread))
6473         (t (gnus-summary-find-next unread))))
6474
6475 (defun gnus-recenter (&optional n)
6476   "Center point in window and redisplay frame.
6477 Also do horizontal recentering."
6478   (interactive "P")
6479   (when (and gnus-auto-center-summary
6480              (not (eq gnus-auto-center-summary 'vertical)))
6481     (gnus-horizontal-recenter))
6482   (recenter n))
6483
6484 (defun gnus-summary-recenter ()
6485   "Center point in the summary window.
6486 If `gnus-auto-center-summary' is nil, or the article buffer isn't
6487 displayed, no centering will be performed."
6488   ;; Suggested by earle@mahendo.JPL.NASA.GOV (Greg Earle).
6489   ;; Recenter only when requested.  Suggested by popovich@park.cs.columbia.edu.
6490   (interactive)
6491   ;; The user has to want it.
6492   (when gnus-auto-center-summary
6493     (let* ((top (cond ((< (window-height) 4) 0)
6494                       ((< (window-height) 7) 1)
6495                       (t (if (numberp gnus-auto-center-summary)
6496                              gnus-auto-center-summary
6497                            2))))
6498            (height (1- (window-height)))
6499            (bottom (save-excursion (goto-char (point-max))
6500                                    (forward-line (- height))
6501                                    (point)))
6502            (window (get-buffer-window (current-buffer))))
6503       (when (get-buffer-window gnus-article-buffer)
6504         ;; Only do recentering when the article buffer is displayed,
6505         ;; Set the window start to either `bottom', which is the biggest
6506         ;; possible valid number, or the second line from the top,
6507         ;; whichever is the least.
6508         (let ((top-pos (save-excursion (forward-line (- top)) (point))))
6509           (if (> bottom top-pos)
6510               ;; Keep the second line from the top visible
6511               (set-window-start window top-pos t)
6512             ;; Try to keep the bottom line visible; if it's partially
6513             ;; obscured, either scroll one more line to make it fully
6514             ;; visible, or revert to using TOP-POS.
6515             (save-excursion
6516               (goto-char (point-max))
6517               (forward-line -1)
6518               (let ((last-line-start (point)))
6519                 (goto-char bottom)
6520                 (set-window-start window (point) t)
6521                 (when (not (pos-visible-in-window-p last-line-start window))
6522                   (forward-line 1)
6523                   (set-window-start window (min (point) top-pos) t)))))))
6524       ;; Do horizontal recentering while we're at it.
6525       (when (and (get-buffer-window (current-buffer) t)
6526                  (not (eq gnus-auto-center-summary 'vertical)))
6527         (let ((selected (selected-window)))
6528           (select-window (get-buffer-window (current-buffer) t))
6529           (gnus-summary-position-point)
6530           (gnus-horizontal-recenter)
6531           (select-window selected))))))
6532
6533 (defun gnus-summary-jump-to-group (newsgroup)
6534   "Move point to NEWSGROUP in group mode buffer."
6535   ;; Keep update point of group mode buffer if visible.
6536   (if (eq (current-buffer) (get-buffer gnus-group-buffer))
6537       (save-window-excursion
6538         ;; Take care of tree window mode.
6539         (when (get-buffer-window gnus-group-buffer)
6540           (pop-to-buffer gnus-group-buffer))
6541         (gnus-group-jump-to-group newsgroup))
6542     (save-excursion
6543       ;; Take care of tree window mode.
6544       (if (get-buffer-window gnus-group-buffer)
6545           (pop-to-buffer gnus-group-buffer)
6546         (set-buffer gnus-group-buffer))
6547       (gnus-group-jump-to-group newsgroup))))
6548
6549 ;; This function returns a list of article numbers based on the
6550 ;; difference between the ranges of read articles in this group and
6551 ;; the range of active articles.
6552 (defun gnus-list-of-unread-articles (group)
6553   (let* ((read (gnus-info-read (gnus-get-info group)))
6554          (active (or (gnus-active group) (gnus-activate-group group)))
6555          (last (cdr active))
6556          (bottom (if gnus-newsgroup-maximum-articles
6557                      (max (car active)
6558                           (- last gnus-newsgroup-maximum-articles -1))
6559                    (car active)))
6560          first nlast unread)
6561     ;; If none are read, then all are unread.
6562     (if (not read)
6563         (setq first bottom)
6564       ;; If the range of read articles is a single range, then the
6565       ;; first unread article is the article after the last read
6566       ;; article.  Sounds logical, doesn't it?
6567       (if (and (not (listp (cdr read)))
6568                (or (< (car read) bottom)
6569                    (progn (setq read (list read))
6570                           nil)))
6571           (setq first (max bottom (1+ (cdr read))))
6572         ;; `read' is a list of ranges.
6573         (when (/= (setq nlast (or (and (numberp (car read)) (car read))
6574                                   (caar read)))
6575                   1)
6576           (setq first bottom))
6577         (while read
6578           (when first
6579             (while (< first nlast)
6580               (setq unread (cons first unread)
6581                     first (1+ first))))
6582           (setq first (1+ (if (atom (car read)) (car read) (cdar read))))
6583           (setq nlast (if (atom (cadr read)) (cadr read) (caadr read)))
6584           (setq read (cdr read)))))
6585     ;; And add the last unread articles.
6586     (while (<= first last)
6587       (setq unread (cons first unread)
6588             first (1+ first)))
6589     ;; Return the list of unread articles.
6590     (delq 0 (nreverse unread))))
6591
6592 (defun gnus-list-of-read-articles (group)
6593   "Return a list of unread, unticked and non-dormant articles."
6594   (let* ((info (gnus-get-info group))
6595          (marked (gnus-info-marks info))
6596          (active (gnus-active group)))
6597     (and info active
6598          (gnus-list-range-difference
6599           (gnus-list-range-difference
6600            (gnus-sorted-complement
6601             (gnus-uncompress-range
6602              (if gnus-newsgroup-maximum-articles
6603                  (cons (max (car active)
6604                             (- (cdr active)
6605                                gnus-newsgroup-maximum-articles
6606                                -1))
6607                        (cdr active))
6608                active))
6609             (gnus-list-of-unread-articles group))
6610            (cdr (assq 'dormant marked)))
6611           (cdr (assq 'tick marked))))))
6612
6613 ;; This function returns a sequence of article numbers based on the
6614 ;; difference between the ranges of read articles in this group and
6615 ;; the range of active articles.
6616 (defun gnus-sequence-of-unread-articles (group)
6617   (let* ((read (gnus-info-read (gnus-get-info group)))
6618          (active (or (gnus-active group) (gnus-activate-group group)))
6619          (last (cdr active))
6620          (bottom (if gnus-newsgroup-maximum-articles
6621                      (max (car active)
6622                           (- last gnus-newsgroup-maximum-articles -1))
6623                    (car active)))
6624          first nlast unread)
6625     ;; If none are read, then all are unread.
6626     (if (not read)
6627         (setq first bottom)
6628       ;; If the range of read articles is a single range, then the
6629       ;; first unread article is the article after the last read
6630       ;; article.  Sounds logical, doesn't it?
6631       (if (and (not (listp (cdr read)))
6632                (or (< (car read) bottom)
6633                    (progn (setq read (list read))
6634                           nil)))
6635           (setq first (max bottom (1+ (cdr read))))
6636         ;; `read' is a list of ranges.
6637         (when (/= (setq nlast (or (and (numberp (car read)) (car read))
6638                                   (caar read)))
6639                   1)
6640           (setq first bottom))
6641         (while read
6642           (when first
6643             (push (cons first nlast) unread))
6644           (setq first (1+ (if (atom (car read)) (car read) (cdar read))))
6645           (setq nlast (if (atom (cadr read)) (cadr read) (caadr read)))
6646           (setq read (cdr read)))))
6647     ;; And add the last unread articles.
6648     (cond ((not (and first last))
6649            nil)
6650           ((< first last)
6651            (push (cons first last) unread))
6652           ((= first last)
6653            (push first unread)))
6654     ;; Return the sequence of unread articles.
6655     (delq 0 (nreverse unread))))
6656
6657 ;; Various summary commands
6658
6659 (defun gnus-summary-select-article-buffer ()
6660   "Reconfigure windows to show article buffer."
6661   (interactive)
6662   (if (not (gnus-buffer-live-p gnus-article-buffer))
6663       (error "There is no article buffer for this summary buffer")
6664     (gnus-configure-windows 'article)
6665     (select-window (get-buffer-window gnus-article-buffer))))
6666
6667 (defun gnus-summary-universal-argument (arg)
6668   "Perform any operation on all articles that are process/prefixed."
6669   (interactive "P")
6670   (let ((articles (gnus-summary-work-articles arg))
6671         func article)
6672     (if (eq
6673          (setq
6674           func
6675           (key-binding
6676            (read-key-sequence
6677             (substitute-command-keys
6678              "\\<gnus-summary-mode-map>\\[gnus-summary-universal-argument]"))))
6679          'undefined)
6680         (gnus-error 1 "Undefined key")
6681       (save-excursion
6682         (while articles
6683           (gnus-summary-goto-subject (setq article (pop articles)))
6684           (let (gnus-newsgroup-processable)
6685             (command-execute func))
6686           (gnus-summary-remove-process-mark article)))))
6687   (gnus-summary-position-point))
6688
6689 (defun gnus-summary-toggle-truncation (&optional arg)
6690   "Toggle truncation of summary lines.
6691 With ARG, turn line truncation on if ARG is positive."
6692   (interactive "P")
6693   (setq truncate-lines
6694         (if (null arg) (not truncate-lines)
6695           (> (prefix-numeric-value arg) 0)))
6696   (redraw-display))
6697
6698 (defun gnus-summary-find-for-reselect ()
6699   "Return the number of an article to stay on across a reselect.
6700 The current article is considered, then following articles, then previous
6701 articles.  An article is sought which is not cancelled and isn't a temporary
6702 insertion from another group.  If there's no such then return a dummy 0."
6703   (let (found)
6704     (dolist (rev '(nil t))
6705       (unless found      ; don't demand the reverse list if we don't need it
6706         (let ((data (gnus-data-find-list
6707                      (gnus-summary-article-number) (gnus-data-list rev))))
6708           (while (and data (not found))
6709             (if (and (< 0 (gnus-data-number (car data)))
6710                      (not (eq gnus-canceled-mark (gnus-data-mark (car data)))))
6711                 (setq found (gnus-data-number (car data))))
6712             (setq data (cdr data))))))
6713     (or found 0)))
6714
6715 (defun gnus-summary-reselect-current-group (&optional all rescan)
6716   "Exit and then reselect the current newsgroup.
6717 The prefix argument ALL means to select all articles."
6718   (interactive "P")
6719   (when (gnus-ephemeral-group-p gnus-newsgroup-name)
6720     (error "Ephemeral groups can't be reselected"))
6721   (let ((current-subject (gnus-summary-find-for-reselect))
6722         (group gnus-newsgroup-name))
6723     (setq gnus-newsgroup-begin nil)
6724     (gnus-summary-exit nil 'leave-hidden)
6725     ;; We have to adjust the point of group mode buffer because
6726     ;; point was moved to the next unread newsgroup by exiting.
6727     (gnus-summary-jump-to-group group)
6728     (when rescan
6729       (save-excursion
6730         (gnus-group-get-new-news-this-group 1)))
6731     (gnus-group-read-group all t)
6732     (gnus-summary-goto-subject current-subject nil t)))
6733
6734 (defun gnus-summary-rescan-group (&optional all)
6735   "Exit the newsgroup, ask for new articles, and select the newsgroup."
6736   (interactive "P")
6737   (gnus-summary-reselect-current-group all t))
6738
6739 (defun gnus-summary-update-info (&optional non-destructive)
6740   (save-excursion
6741     (let ((group gnus-newsgroup-name))
6742       (when group
6743         (when gnus-newsgroup-kill-headers
6744           (setq gnus-newsgroup-killed
6745                 (gnus-compress-sequence
6746                  (gnus-sorted-union
6747                   (gnus-list-range-intersection
6748                    gnus-newsgroup-unselected gnus-newsgroup-killed)
6749                   gnus-newsgroup-unreads)
6750                  t)))
6751         (unless (listp (cdr gnus-newsgroup-killed))
6752           (setq gnus-newsgroup-killed (list gnus-newsgroup-killed)))
6753         (let ((headers gnus-newsgroup-headers))
6754           ;; Set the new ranges of read articles.
6755           (save-excursion
6756             (set-buffer gnus-group-buffer)
6757             (gnus-undo-force-boundary))
6758           (gnus-update-read-articles
6759            group (gnus-sorted-union
6760                   gnus-newsgroup-unreads gnus-newsgroup-unselected))
6761           ;; Set the current article marks.
6762           (let ((gnus-newsgroup-scored
6763                  (if (and (not gnus-save-score)
6764                           (not non-destructive))
6765                      nil
6766                    gnus-newsgroup-scored)))
6767             (save-excursion
6768               (gnus-update-marks)))
6769           ;; Do the cross-ref thing.
6770           (when gnus-use-cross-reference
6771             (gnus-mark-xrefs-as-read group headers gnus-newsgroup-unreads))
6772           ;; Do not switch windows but change the buffer to work.
6773           (set-buffer gnus-group-buffer)
6774           (unless (gnus-ephemeral-group-p group)
6775             (gnus-group-update-group group)))))))
6776
6777 (defun gnus-summary-save-newsrc (&optional force)
6778   "Save the current number of read/marked articles in the dribble buffer.
6779 The dribble buffer will then be saved.
6780 If FORCE (the prefix), also save the .newsrc file(s)."
6781   (interactive "P")
6782   (gnus-summary-update-info t)
6783   (if force
6784       (gnus-save-newsrc-file)
6785     (gnus-dribble-save)))
6786
6787 (defun gnus-summary-exit (&optional temporary leave-hidden)
6788   "Exit reading current newsgroup, and then return to group selection mode.
6789 `gnus-exit-group-hook' is called with no arguments if that value is non-nil."
6790   (interactive)
6791   (gnus-set-global-variables)
6792   (when (gnus-buffer-live-p gnus-article-buffer)
6793     (save-excursion
6794       (set-buffer gnus-article-buffer)
6795       (mm-destroy-parts gnus-article-mime-handles)
6796       ;; Set it to nil for safety reason.
6797       (setq gnus-article-mime-handle-alist nil)
6798       (setq gnus-article-mime-handles nil)))
6799   (gnus-kill-save-kill-buffer)
6800   (gnus-async-halt-prefetch)
6801   (let* ((group gnus-newsgroup-name)
6802          (quit-config (gnus-group-quit-config gnus-newsgroup-name))
6803          (gnus-group-is-exiting-p t)
6804          (mode major-mode)
6805          (group-point nil)
6806          (buf (current-buffer)))
6807     (unless quit-config
6808       ;; Do adaptive scoring, and possibly save score files.
6809       (when gnus-newsgroup-adaptive
6810         (gnus-score-adaptive))
6811       (when gnus-use-scoring
6812         (gnus-score-save)))
6813     (gnus-run-hooks 'gnus-summary-prepare-exit-hook)
6814     ;; If we have several article buffers, we kill them at exit.
6815     (unless gnus-single-article-buffer
6816       (gnus-kill-buffer gnus-original-article-buffer)
6817       (setq gnus-article-current nil))
6818     (when gnus-use-cache
6819       (gnus-cache-possibly-remove-articles)
6820       (gnus-cache-save-buffers))
6821     (gnus-async-prefetch-remove-group group)
6822     (when gnus-suppress-duplicates
6823       (gnus-dup-enter-articles))
6824     (when gnus-use-trees
6825       (gnus-tree-close group))
6826     (when gnus-use-cache
6827       (gnus-cache-write-active))
6828     ;; Remove entries for this group.
6829     (nnmail-purge-split-history (gnus-group-real-name group))
6830     ;; Make all changes in this group permanent.
6831     (unless quit-config
6832       (gnus-run-hooks 'gnus-exit-group-hook)
6833       (gnus-summary-update-info))
6834     (gnus-close-group group)
6835     ;; Make sure where we were, and go to next newsgroup.
6836     (set-buffer gnus-group-buffer)
6837     (unless quit-config
6838       (gnus-group-jump-to-group group))
6839     (gnus-run-hooks 'gnus-summary-exit-hook)
6840     (unless (or quit-config
6841                 ;; If this group has disappeared from the summary
6842                 ;; buffer, don't skip forwards.
6843                 (not (string= group (gnus-group-group-name))))
6844       (gnus-group-next-unread-group 1))
6845     (setq group-point (point))
6846     (if temporary
6847         nil                             ;Nothing to do.
6848       ;; If we have several article buffers, we kill them at exit.
6849       (unless gnus-single-article-buffer
6850         (gnus-kill-buffer gnus-article-buffer)
6851         (gnus-kill-buffer gnus-original-article-buffer)
6852         (setq gnus-article-current nil))
6853       (set-buffer buf)
6854       (if (not gnus-kill-summary-on-exit)
6855           (progn
6856             (gnus-deaden-summary)
6857             (setq mode nil))
6858         ;; We set all buffer-local variables to nil.  It is unclear why
6859         ;; this is needed, but if we don't, buffer-local variables are
6860         ;; not garbage-collected, it seems.  This would the lead to en
6861         ;; ever-growing Emacs.
6862         (gnus-summary-clear-local-variables)
6863         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
6864           (gnus-summary-clear-local-variables))
6865         (when (get-buffer gnus-article-buffer)
6866           (bury-buffer gnus-article-buffer))
6867         ;; We clear the global counterparts of the buffer-local
6868         ;; variables as well, just to be on the safe side.
6869         (set-buffer gnus-group-buffer)
6870         (gnus-summary-clear-local-variables)
6871         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
6872           (gnus-summary-clear-local-variables))
6873         ;; Return to group mode buffer.
6874         (when (eq mode 'gnus-summary-mode)
6875           (gnus-kill-buffer buf)))
6876       (setq gnus-current-select-method gnus-select-method)
6877       (set-buffer gnus-group-buffer)
6878       (if quit-config
6879           (gnus-handle-ephemeral-exit quit-config)
6880         (goto-char group-point)
6881         ;; If gnus-group-buffer is already displayed, make sure we also move
6882         ;; the cursor in the window that displays it.
6883         (let ((win (get-buffer-window (current-buffer) 0)))
6884           (if win (set-window-point win (point))))
6885         (unless leave-hidden
6886           (gnus-configure-windows 'group 'force)))
6887       ;; Clear the current group name.
6888       (unless quit-config
6889         (setq gnus-newsgroup-name nil)))))
6890
6891 (defalias 'gnus-summary-quit 'gnus-summary-exit-no-update)
6892 (defun gnus-summary-exit-no-update (&optional no-questions)
6893   "Quit reading current newsgroup without updating read article info."
6894   (interactive)
6895   (let* ((group gnus-newsgroup-name)
6896          (gnus-group-is-exiting-p t)
6897          (gnus-group-is-exiting-without-update-p t)
6898          (quit-config (gnus-group-quit-config group)))
6899     (when (or no-questions
6900               gnus-expert-user
6901               (gnus-y-or-n-p "Discard changes to this group and exit? "))
6902       (gnus-async-halt-prefetch)
6903       (run-hooks 'gnus-summary-prepare-exit-hook)
6904       (when (gnus-buffer-live-p gnus-article-buffer)
6905         (save-excursion
6906           (set-buffer gnus-article-buffer)
6907           (mm-destroy-parts gnus-article-mime-handles)
6908           ;; Set it to nil for safety reason.
6909           (setq gnus-article-mime-handle-alist nil)
6910           (setq gnus-article-mime-handles nil)))
6911       ;; If we have several article buffers, we kill them at exit.
6912       (unless gnus-single-article-buffer
6913         (gnus-kill-buffer gnus-article-buffer)
6914         (gnus-kill-buffer gnus-original-article-buffer)
6915         (setq gnus-article-current nil))
6916       (if (not gnus-kill-summary-on-exit)
6917           (gnus-deaden-summary)
6918         (gnus-close-group group)
6919         (gnus-summary-clear-local-variables)
6920         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
6921           (gnus-summary-clear-local-variables))
6922         (set-buffer gnus-group-buffer)
6923         (gnus-summary-clear-local-variables)
6924         (let ((gnus-summary-local-variables gnus-newsgroup-variables))
6925           (gnus-summary-clear-local-variables))
6926         (gnus-kill-buffer gnus-summary-buffer))
6927       (unless gnus-single-article-buffer
6928         (setq gnus-article-current nil))
6929       (when gnus-use-trees
6930         (gnus-tree-close group))
6931       (gnus-async-prefetch-remove-group group)
6932       (when (get-buffer gnus-article-buffer)
6933         (bury-buffer gnus-article-buffer))
6934       ;; Return to the group buffer.
6935       (gnus-configure-windows 'group 'force)
6936       ;; Clear the current group name.
6937       (setq gnus-newsgroup-name nil)
6938       (unless (gnus-ephemeral-group-p group)
6939         (gnus-group-update-group group))
6940       (when (equal (gnus-group-group-name) group)
6941         (gnus-group-next-unread-group 1))
6942       (when quit-config
6943         (gnus-handle-ephemeral-exit quit-config)))))
6944
6945 (defun gnus-handle-ephemeral-exit (quit-config)
6946   "Handle movement when leaving an ephemeral group.
6947 The state which existed when entering the ephemeral is reset."
6948   (if (not (buffer-name (car quit-config)))
6949       (gnus-configure-windows 'group 'force)
6950     (set-buffer (car quit-config))
6951     (cond ((eq major-mode 'gnus-summary-mode)
6952            (gnus-set-global-variables))
6953           ((eq major-mode 'gnus-article-mode)
6954            (save-excursion
6955              ;; The `gnus-summary-buffer' variable may point
6956              ;; to the old summary buffer when using a single
6957              ;; article buffer.
6958              (unless (gnus-buffer-live-p gnus-summary-buffer)
6959                (set-buffer gnus-group-buffer))
6960              (set-buffer gnus-summary-buffer)
6961              (gnus-set-global-variables))))
6962     (if (or (eq (cdr quit-config) 'article)
6963             (eq (cdr quit-config) 'pick))
6964         (progn
6965           ;; The current article may be from the ephemeral group
6966           ;; thus it is best that we reload this article
6967           ;;
6968           ;; If we're exiting from a large digest, this can be
6969           ;; extremely slow.  So, it's better not to reload it. -- jh.
6970           ;;(gnus-summary-show-article)
6971           (if (and (boundp 'gnus-pick-mode) (symbol-value 'gnus-pick-mode))
6972               (gnus-configure-windows 'pick 'force)
6973             (gnus-configure-windows (cdr quit-config) 'force)))
6974       (gnus-configure-windows (cdr quit-config) 'force))
6975     (when (eq major-mode 'gnus-summary-mode)
6976       (gnus-summary-next-subject 1 nil t)
6977       (gnus-summary-recenter)
6978       (gnus-summary-position-point))))
6979
6980 ;;; Dead summaries.
6981
6982 (defvar gnus-dead-summary-mode-map nil)
6983
6984 (unless gnus-dead-summary-mode-map
6985   (setq gnus-dead-summary-mode-map (make-keymap))
6986   (suppress-keymap gnus-dead-summary-mode-map)
6987   (substitute-key-definition
6988    'undefined 'gnus-summary-wake-up-the-dead gnus-dead-summary-mode-map)
6989   (dolist (key '("\C-d" "\r" "\177" [delete]))
6990     (define-key gnus-dead-summary-mode-map
6991       key 'gnus-summary-wake-up-the-dead))
6992   (dolist (key '("q" "Q"))
6993     (define-key gnus-dead-summary-mode-map key 'bury-buffer)))
6994
6995 (defvar gnus-dead-summary-mode nil
6996   "Minor mode for Gnus summary buffers.")
6997
6998 (defun gnus-dead-summary-mode (&optional arg)
6999   "Minor mode for Gnus summary buffers."
7000   (interactive "P")
7001   (when (eq major-mode 'gnus-summary-mode)
7002     (make-local-variable 'gnus-dead-summary-mode)
7003     (setq gnus-dead-summary-mode
7004           (if (null arg) (not gnus-dead-summary-mode)
7005             (> (prefix-numeric-value arg) 0)))
7006     (when gnus-dead-summary-mode
7007       (gnus-add-minor-mode
7008        'gnus-dead-summary-mode " Dead" gnus-dead-summary-mode-map))))
7009
7010 (defun gnus-deaden-summary ()
7011   "Make the current summary buffer into a dead summary buffer."
7012   ;; Kill any previous dead summary buffer.
7013   (when (and gnus-dead-summary
7014              (buffer-name gnus-dead-summary))
7015     (save-excursion
7016       (set-buffer gnus-dead-summary)
7017       (when gnus-dead-summary-mode
7018         (kill-buffer (current-buffer)))))
7019   ;; Make this the current dead summary.
7020   (setq gnus-dead-summary (current-buffer))
7021   (gnus-dead-summary-mode 1)
7022   (let ((name (buffer-name)))
7023     (when (string-match "Summary" name)
7024       (rename-buffer
7025        (concat (substring name 0 (match-beginning 0)) "Dead "
7026                (substring name (match-beginning 0)))
7027        t)
7028       (bury-buffer))))
7029
7030 (defun gnus-kill-or-deaden-summary (buffer)
7031   "Kill or deaden the summary BUFFER."
7032   (save-excursion
7033     (when (and (buffer-name buffer)
7034                (not gnus-single-article-buffer))
7035       (save-excursion
7036         (set-buffer buffer)
7037         (gnus-kill-buffer gnus-article-buffer)
7038         (gnus-kill-buffer gnus-original-article-buffer)))
7039     (cond
7040      ;; Kill the buffer.
7041      (gnus-kill-summary-on-exit
7042       (when (and gnus-use-trees
7043                  (gnus-buffer-exists-p buffer))
7044         (save-excursion
7045           (set-buffer buffer)
7046           (gnus-tree-close gnus-newsgroup-name)))
7047       (gnus-kill-buffer buffer))
7048      ;; Deaden the buffer.
7049      ((gnus-buffer-exists-p buffer)
7050       (save-excursion
7051         (set-buffer buffer)
7052         (gnus-deaden-summary))))))
7053
7054 (defun gnus-summary-wake-up-the-dead (&rest args)
7055   "Wake up the dead summary buffer."
7056   (interactive)
7057   (gnus-dead-summary-mode -1)
7058   (let ((name (buffer-name)))
7059     (when (string-match "Dead " name)
7060       (rename-buffer
7061        (concat (substring name 0 (match-beginning 0))
7062                (substring name (match-end 0)))
7063        t)))
7064   (gnus-message 3 "This dead summary is now alive again"))
7065
7066 ;; Suggested by Andrew Eskilsson <pi92ae@pt.hk-r.se>.
7067 (defun gnus-summary-fetch-faq (&optional faq-dir)
7068   "Fetch the FAQ for the current group.
7069 If FAQ-DIR (the prefix), prompt for a directory to search for the faq
7070 in."
7071   (interactive
7072    (list
7073     (when current-prefix-arg
7074       (completing-read
7075        "FAQ dir: " (and (listp gnus-group-faq-directory)
7076                         (mapcar (lambda (file) (list file))
7077                                 gnus-group-faq-directory))))))
7078   (let (gnus-faq-buffer)
7079     (when (setq gnus-faq-buffer
7080                 (gnus-group-fetch-faq gnus-newsgroup-name faq-dir))
7081       (gnus-configure-windows 'summary-faq))))
7082
7083 ;; Suggested by Per Abrahamsen <amanda@iesd.auc.dk>.
7084 (defun gnus-summary-describe-group (&optional force)
7085   "Describe the current newsgroup."
7086   (interactive "P")
7087   (gnus-group-describe-group force gnus-newsgroup-name))
7088
7089 (defun gnus-summary-describe-briefly ()
7090   "Describe summary mode commands briefly."
7091   (interactive)
7092   (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")))
7093
7094 ;; Walking around group mode buffer from summary mode.
7095
7096 (defun gnus-summary-next-group (&optional no-article target-group backward)
7097   "Exit current newsgroup and then select next unread newsgroup.
7098 If prefix argument NO-ARTICLE is non-nil, no article is selected
7099 initially.  If TARGET-GROUP, go to this group.  If BACKWARD, go to
7100 previous group instead."
7101   (interactive "P")
7102   ;; Stop pre-fetching.
7103   (gnus-async-halt-prefetch)
7104   (let ((current-group gnus-newsgroup-name)
7105         (current-buffer (current-buffer))
7106         entered)
7107     ;; First we semi-exit this group to update Xrefs and all variables.
7108     ;; We can't do a real exit, because the window conf must remain
7109     ;; the same in case the user is prompted for info, and we don't
7110     ;; want the window conf to change before that...
7111     (gnus-summary-exit t)
7112     (while (not entered)
7113       ;; Then we find what group we are supposed to enter.
7114       (set-buffer gnus-group-buffer)
7115       (gnus-group-jump-to-group current-group)
7116       (setq target-group
7117             (or target-group
7118                 (if (eq gnus-keep-same-level 'best)
7119                     (gnus-summary-best-group gnus-newsgroup-name)
7120                   (gnus-summary-search-group backward gnus-keep-same-level))))
7121       (if (not target-group)
7122           ;; There are no further groups, so we return to the group
7123           ;; buffer.
7124           (progn
7125             (gnus-message 5 "Returning to the group buffer")
7126             (setq entered t)
7127             (when (gnus-buffer-live-p current-buffer)
7128               (set-buffer current-buffer)
7129               (gnus-summary-exit))
7130             (gnus-run-hooks 'gnus-group-no-more-groups-hook))
7131         ;; We try to enter the target group.
7132         (gnus-group-jump-to-group target-group)
7133         (let ((unreads (gnus-group-group-unread)))
7134           (if (and (or (eq t unreads)
7135                        (and unreads (not (zerop unreads))))
7136                    (gnus-summary-read-group
7137                     target-group nil no-article
7138                     (and (buffer-name current-buffer) current-buffer)
7139                     nil backward))
7140               (setq entered t)
7141             (setq current-group target-group
7142                   target-group nil)))))))
7143
7144 (defun gnus-summary-prev-group (&optional no-article)
7145   "Exit current newsgroup and then select previous unread newsgroup.
7146 If prefix argument NO-ARTICLE is non-nil, no article is selected initially."
7147   (interactive "P")
7148   (gnus-summary-next-group no-article nil t))
7149
7150 ;; Walking around summary lines.
7151
7152 (defun gnus-summary-first-subject (&optional unread undownloaded unseen)
7153   "Go to the first subject satisfying any non-nil constraint.
7154 If UNREAD is non-nil, the article should be unread.
7155 If UNDOWNLOADED is non-nil, the article should be undownloaded.
7156 If UNSEEN is non-nil, the article should be unseen.
7157 Returns the article selected or nil if there are no matching articles."
7158   (interactive "P")
7159   (cond
7160    ;; Empty summary.
7161    ((null gnus-newsgroup-data)
7162     (gnus-message 3 "No articles in the group")
7163     nil)
7164    ;; Pick the first article.
7165    ((not (or unread undownloaded unseen))
7166     (goto-char (gnus-data-pos (car gnus-newsgroup-data)))
7167     (gnus-data-number (car gnus-newsgroup-data)))
7168    ;; Find the first unread article.
7169    (t
7170     (let ((data gnus-newsgroup-data))
7171       (while (and data
7172                   (let ((num (gnus-data-number (car data))))
7173                     (or (memq num gnus-newsgroup-unfetched)
7174                         (not (or (and unread
7175                                       (memq num gnus-newsgroup-unreads))
7176                                  (and undownloaded
7177                                       (memq num gnus-newsgroup-undownloaded))
7178                                  (and unseen
7179                                       (memq num gnus-newsgroup-unseen)))))))
7180         (setq data (cdr data)))
7181       (prog1
7182           (if data
7183               (progn
7184                 (goto-char (gnus-data-pos (car data)))
7185                 (gnus-data-number (car data)))
7186             (gnus-message 3 "No more%s articles"
7187                           (let* ((r (when unread " unread"))
7188                                  (d (when undownloaded " undownloaded"))
7189                                  (s (when unseen " unseen"))
7190                                  (l (delq nil (list r d s))))
7191                             (cond ((= 3 (length l))
7192                                    (concat r "," d ", or" s))
7193                                   ((= 2 (length l))
7194                                    (concat (car l) ", or" (cadr l)))
7195                                   ((= 1 (length l))
7196                                    (car l))
7197                                   (t
7198                                    ""))))
7199             nil
7200             )
7201         (gnus-summary-position-point))))))
7202
7203 (defun gnus-summary-next-subject (n &optional unread dont-display)
7204   "Go to next N'th summary line.
7205 If N is negative, go to the previous N'th subject line.
7206 If UNREAD is non-nil, only unread articles are selected.
7207 The difference between N and the actual number of steps taken is
7208 returned."
7209   (interactive "p")
7210   (let ((backward (< n 0))
7211         (n (abs n)))
7212     (while (and (> n 0)
7213                 (if backward
7214                     (gnus-summary-find-prev unread)
7215                   (gnus-summary-find-next unread)))
7216       (unless (zerop (setq n (1- n)))
7217         (gnus-summary-show-thread)))
7218     (when (/= 0 n)
7219       (gnus-message 7 "No more%s articles"
7220                     (if unread " unread" "")))
7221     (unless dont-display
7222       (gnus-summary-recenter)
7223       (gnus-summary-position-point))
7224     n))
7225
7226 (defun gnus-summary-next-unread-subject (n)
7227   "Go to next N'th unread summary line."
7228   (interactive "p")
7229   (gnus-summary-next-subject n t))
7230
7231 (defun gnus-summary-prev-subject (n &optional unread)
7232   "Go to previous N'th summary line.
7233 If optional argument UNREAD is non-nil, only unread article is selected."
7234   (interactive "p")
7235   (gnus-summary-next-subject (- n) unread))
7236
7237 (defun gnus-summary-prev-unread-subject (n)
7238   "Go to previous N'th unread summary line."
7239   (interactive "p")
7240   (gnus-summary-next-subject (- n) t))
7241
7242 (defun gnus-summary-goto-subjects (articles)
7243   "Insert the subject header for ARTICLES in the current buffer."
7244   (save-excursion
7245     (dolist (article articles)
7246       (gnus-summary-goto-subject article t)))
7247   (gnus-summary-limit (append articles gnus-newsgroup-limit))
7248   (gnus-summary-position-point))
7249
7250 (defun gnus-summary-goto-subject (article &optional force silent)
7251   "Go the subject line of ARTICLE.
7252 If FORCE, also allow jumping to articles not currently shown."
7253   (interactive "nArticle number: ")
7254   (unless (numberp article)
7255     (error "Article %s is not a number" article))
7256   (let ((b (point))
7257         (data (gnus-data-find article)))
7258     ;; We read in the article if we have to.
7259     (and (not data)
7260          force
7261          (gnus-summary-insert-subject
7262           article
7263           (if (or (numberp force) (vectorp force)) force)
7264           t)
7265          (setq data (gnus-data-find article)))
7266     (goto-char b)
7267     (if (not data)
7268         (progn
7269           (unless silent
7270             (gnus-message 3 "Can't find article %d" article))
7271           nil)
7272       (let ((pt (gnus-data-pos data)))
7273         (goto-char pt)
7274         (gnus-summary-set-article-display-arrow pt))
7275       (gnus-summary-position-point)
7276       article)))
7277
7278 ;; Walking around summary lines with displaying articles.
7279
7280 (defun gnus-summary-expand-window (&optional arg)
7281   "Make the summary buffer take up the entire Emacs frame.
7282 Given a prefix, will force an `article' buffer configuration."
7283   (interactive "P")
7284   (if arg
7285       (gnus-configure-windows 'article 'force)
7286     (gnus-configure-windows 'summary 'force)))
7287
7288 (defun gnus-summary-display-article (article &optional all-header)
7289   "Display ARTICLE in article buffer."
7290   (when (gnus-buffer-live-p gnus-article-buffer)
7291     (with-current-buffer gnus-article-buffer
7292       (mm-enable-multibyte)))
7293   (gnus-set-global-variables)
7294   (when (gnus-buffer-live-p gnus-article-buffer)
7295     (with-current-buffer gnus-article-buffer
7296       (setq gnus-article-charset gnus-newsgroup-charset)
7297       (setq gnus-article-ignored-charsets gnus-newsgroup-ignored-charsets)
7298       (mm-enable-multibyte)))
7299   (if (null article)
7300       nil
7301     (prog1
7302         (if gnus-summary-display-article-function
7303             (funcall gnus-summary-display-article-function article all-header)
7304           (gnus-article-prepare article all-header))
7305       (gnus-run-hooks 'gnus-select-article-hook)
7306       (when (and gnus-current-article
7307                  (not (zerop gnus-current-article)))
7308         (gnus-summary-goto-subject gnus-current-article))
7309       (gnus-summary-recenter)
7310       (when (and gnus-use-trees gnus-show-threads)
7311         (gnus-possibly-generate-tree article)
7312         (gnus-highlight-selected-tree article))
7313       ;; Successfully display article.
7314       (gnus-article-set-window-start
7315        (cdr (assq article gnus-newsgroup-bookmarks))))))
7316
7317 (defun gnus-summary-select-article (&optional all-headers force pseudo article)
7318   "Select the current article.
7319 If ALL-HEADERS is non-nil, show all header fields.  If FORCE is
7320 non-nil, the article will be re-fetched even if it already present in
7321 the article buffer.  If PSEUDO is non-nil, pseudo-articles will also
7322 be displayed."
7323   ;; Make sure we are in the summary buffer to work around bbdb bug.
7324   (unless (eq major-mode 'gnus-summary-mode)
7325     (set-buffer gnus-summary-buffer))
7326   (let ((article (or article (gnus-summary-article-number)))
7327         (all-headers (not (not all-headers))) ;Must be t or nil.
7328         gnus-summary-display-article-function)
7329     (and (not pseudo)
7330          (gnus-summary-article-pseudo-p article)
7331          (error "This is a pseudo-article"))
7332     (save-excursion
7333       (set-buffer gnus-summary-buffer)
7334       (if (or (and gnus-single-article-buffer
7335                    (or (null gnus-current-article)
7336                        (null gnus-article-current)
7337                        (null (get-buffer gnus-article-buffer))
7338                        (not (eq article (cdr gnus-article-current)))
7339                        (not (equal (car gnus-article-current)
7340                                    gnus-newsgroup-name))))
7341               (and (not gnus-single-article-buffer)
7342                    (or (null gnus-current-article)
7343                        (not (eq gnus-current-article article))))
7344               force)
7345           ;; The requested article is different from the current article.
7346           (progn
7347             (gnus-summary-display-article article all-headers)
7348             (when (gnus-buffer-live-p gnus-article-buffer)
7349               (with-current-buffer gnus-article-buffer
7350                 (if (not gnus-article-decoded-p) ;; a local variable
7351                     (mm-disable-multibyte))))
7352             (gnus-article-set-window-start
7353              (cdr (assq article gnus-newsgroup-bookmarks)))
7354             article)
7355         'old))))
7356
7357 (defun gnus-summary-force-verify-and-decrypt ()
7358   "Display buttons for signed/encrypted parts and verify/decrypt them."
7359   (interactive)
7360   (let ((mm-verify-option 'known)
7361         (mm-decrypt-option 'known)
7362         (gnus-article-emulate-mime t)
7363         (gnus-buttonized-mime-types (append (list "multipart/signed"
7364                                                   "multipart/encrypted")
7365                                             gnus-buttonized-mime-types)))
7366     (gnus-summary-select-article nil 'force)))
7367
7368 (defun gnus-summary-set-current-mark (&optional current-mark)
7369   "Obsolete function."
7370   nil)
7371
7372 (defun gnus-summary-next-article (&optional unread subject backward push)
7373   "Select the next article.
7374 If UNREAD, only unread articles are selected.
7375 If SUBJECT, only articles with SUBJECT are selected.
7376 If BACKWARD, the previous article is selected instead of the next."
7377   (interactive "P")
7378   ;; Make sure we are in the summary buffer.
7379   (unless (eq major-mode 'gnus-summary-mode)
7380     (set-buffer gnus-summary-buffer))
7381   (cond
7382    ;; Is there such an article?
7383    ((and (gnus-summary-search-forward unread subject backward)
7384          (or (gnus-summary-display-article (gnus-summary-article-number))
7385              (eq (gnus-summary-article-mark) gnus-canceled-mark)))
7386     (gnus-summary-position-point))
7387    ;; If not, we try the first unread, if that is wanted.
7388    ((and subject
7389          gnus-auto-select-same
7390          (gnus-summary-first-unread-article))
7391     (gnus-summary-position-point)
7392     (gnus-message 6 "Wrapped"))
7393    ;; Try to get next/previous article not displayed in this group.
7394    ((and gnus-auto-extend-newsgroup
7395          (not unread) (not subject))
7396     (gnus-summary-goto-article
7397      (if backward (1- gnus-newsgroup-begin) (1+ gnus-newsgroup-end))
7398      nil (count-lines (point-min) (point))))
7399    ;; Go to next/previous group.
7400    (t
7401     (unless (gnus-ephemeral-group-p gnus-newsgroup-name)
7402       (gnus-summary-jump-to-group gnus-newsgroup-name))
7403     (let ((cmd last-command-char)
7404           (point
7405            (save-excursion
7406              (set-buffer gnus-group-buffer)
7407              (point)))
7408           (group
7409            (if (eq gnus-keep-same-level 'best)
7410                (gnus-summary-best-group gnus-newsgroup-name)
7411              (gnus-summary-search-group backward gnus-keep-same-level))))
7412       ;; For some reason, the group window gets selected.  We change
7413       ;; it back.
7414       (select-window (get-buffer-window (current-buffer)))
7415       ;; Select next unread newsgroup automagically.
7416       (cond
7417        ((or (not gnus-auto-select-next)
7418             (not cmd))
7419         (gnus-message 7 "No more%s articles" (if unread " unread" "")))
7420        ((or (eq gnus-auto-select-next 'quietly)
7421             (and (eq gnus-auto-select-next 'slightly-quietly)
7422                  push)
7423             (and (eq gnus-auto-select-next 'almost-quietly)
7424                  (gnus-summary-last-article-p)))
7425         ;; Select quietly.
7426         (if (gnus-ephemeral-group-p gnus-newsgroup-name)
7427             (gnus-summary-exit)
7428           (gnus-message 7 "No more%s articles (%s)..."
7429                         (if unread " unread" "")
7430                         (if group (concat "selecting " group)
7431                           "exiting"))
7432           (gnus-summary-next-group nil group backward)))
7433        (t
7434         (when (gnus-key-press-event-p last-input-event)
7435           (gnus-summary-walk-group-buffer
7436            gnus-newsgroup-name cmd unread backward point))))))))
7437
7438 (defun gnus-summary-walk-group-buffer (from-group cmd unread backward start)
7439   (let ((keystrokes '((?\C-n (gnus-group-next-unread-group 1))
7440                       (?\C-p (gnus-group-prev-unread-group 1))))
7441         (cursor-in-echo-area t)
7442         keve key group ended prompt)
7443     (save-excursion
7444       (set-buffer gnus-group-buffer)
7445       (goto-char start)
7446       (setq group
7447             (if (eq gnus-keep-same-level 'best)
7448                 (gnus-summary-best-group gnus-newsgroup-name)
7449               (gnus-summary-search-group backward gnus-keep-same-level))))
7450     (while (not ended)
7451       (setq prompt
7452             (format
7453              "No more%s articles%s " (if unread " unread" "")
7454              (if (and group
7455                       (not (gnus-ephemeral-group-p gnus-newsgroup-name)))
7456                  (format " (Type %s for %s [%s])"
7457                          (single-key-description cmd)
7458                          (gnus-group-decoded-name group)
7459                          (car (gnus-gethash group gnus-newsrc-hashtb)))
7460                (format " (Type %s to exit %s)"
7461                        (single-key-description cmd)
7462                        (gnus-group-decoded-name gnus-newsgroup-name)))))
7463       ;; Confirm auto selection.
7464       (setq key (car (setq keve (gnus-read-event-char prompt)))
7465             ended t)
7466       (cond
7467        ((assq key keystrokes)
7468         (let ((obuf (current-buffer)))
7469           (switch-to-buffer gnus-group-buffer)
7470           (when group
7471             (gnus-group-jump-to-group group))
7472           (eval (cadr (assq key keystrokes)))
7473           (setq group (gnus-group-group-name))
7474           (switch-to-buffer obuf))
7475         (setq ended nil))
7476        ((equal key cmd)
7477         (if (or (not group)
7478                 (gnus-ephemeral-group-p gnus-newsgroup-name))
7479             (gnus-summary-exit)
7480           (gnus-summary-next-group nil group backward)))
7481        (t
7482         (push (cdr keve) unread-command-events))))))
7483
7484 (defun gnus-summary-next-unread-article ()
7485   "Select unread article after current one."
7486   (interactive)
7487   (gnus-summary-next-article
7488    (or (not (eq gnus-summary-goto-unread 'never))
7489        (gnus-summary-last-article-p (gnus-summary-article-number)))
7490    (and gnus-auto-select-same
7491         (gnus-summary-article-subject))))
7492
7493 (defun gnus-summary-prev-article (&optional unread subject)
7494   "Select the article after the current one.
7495 If UNREAD is non-nil, only unread articles are selected."
7496   (interactive "P")
7497   (gnus-summary-next-article unread subject t))
7498
7499 (defun gnus-summary-prev-unread-article ()
7500   "Select unread article before current one."
7501   (interactive)
7502   (gnus-summary-prev-article
7503    (or (not (eq gnus-summary-goto-unread 'never))
7504        (gnus-summary-first-article-p (gnus-summary-article-number)))
7505    (and gnus-auto-select-same
7506         (gnus-summary-article-subject))))
7507
7508 (defun gnus-summary-next-page (&optional lines circular stop)
7509   "Show next page of the selected article.
7510 If at the end of the current article, select the next article.
7511 LINES says how many lines should be scrolled up.
7512
7513 If CIRCULAR is non-nil, go to the start of the article instead of
7514 selecting the next article when reaching the end of the current
7515 article.
7516
7517 If STOP is non-nil, just stop when reaching the end of the message.
7518
7519 Also see the variable `gnus-article-skip-boring'."
7520   (interactive "P")
7521   (setq gnus-summary-buffer (current-buffer))
7522   (gnus-set-global-variables)
7523   (let ((article (gnus-summary-article-number))
7524         (article-window (get-buffer-window gnus-article-buffer t))
7525         endp)
7526     ;; If the buffer is empty, we have no article.
7527     (unless article
7528       (error "No article to select"))
7529     (gnus-configure-windows 'article)
7530     (if (eq (cdr (assq article gnus-newsgroup-reads)) gnus-canceled-mark)
7531         (if (and (eq gnus-summary-goto-unread 'never)
7532                  (not (gnus-summary-last-article-p article)))
7533             (gnus-summary-next-article)
7534           (gnus-summary-next-unread-article))
7535       (if (or (null gnus-current-article)
7536               (null gnus-article-current)
7537               (/= article (cdr gnus-article-current))
7538               (not (equal (car gnus-article-current) gnus-newsgroup-name)))
7539           ;; Selected subject is different from current article's.
7540           (gnus-summary-display-article article)
7541         (when article-window
7542           (gnus-eval-in-buffer-window gnus-article-buffer
7543             (setq endp (or (gnus-article-next-page lines)
7544                            (gnus-article-only-boring-p))))
7545           (when endp
7546             (cond (stop
7547                    (gnus-message 3 "End of message"))
7548                   (circular
7549                    (gnus-summary-beginning-of-article))
7550                   (lines
7551                    (gnus-message 3 "End of message"))
7552                   ((null lines)
7553                    (if (and (eq gnus-summary-goto-unread 'never)
7554                             (not (gnus-summary-last-article-p article)))
7555                        (gnus-summary-next-article)
7556                      (gnus-summary-next-unread-article))))))))
7557     (gnus-summary-recenter)
7558     (gnus-summary-position-point)))
7559
7560 (defun gnus-summary-prev-page (&optional lines move)
7561   "Show previous page of selected article.
7562 Argument LINES specifies lines to be scrolled down.
7563 If MOVE, move to the previous unread article if point is at
7564 the beginning of the buffer."
7565   (interactive "P")
7566   (let ((article (gnus-summary-article-number))
7567         (article-window (get-buffer-window gnus-article-buffer t))
7568         endp)
7569     (gnus-configure-windows 'article)
7570     (if (or (null gnus-current-article)
7571             (null gnus-article-current)
7572             (/= article (cdr gnus-article-current))
7573             (not (equal (car gnus-article-current) gnus-newsgroup-name)))
7574         ;; Selected subject is different from current article's.
7575         (gnus-summary-display-article article)
7576       (gnus-summary-recenter)
7577       (when article-window
7578         (gnus-eval-in-buffer-window gnus-article-buffer
7579           (setq endp (gnus-article-prev-page lines)))
7580         (when (and move endp)
7581           (cond (lines
7582                  (gnus-message 3 "Beginning of message"))
7583                 ((null lines)
7584                  (if (and (eq gnus-summary-goto-unread 'never)
7585                           (not (gnus-summary-first-article-p article)))
7586                      (gnus-summary-prev-article)
7587                    (gnus-summary-prev-unread-article))))))))
7588   (gnus-summary-position-point))
7589
7590 (defun gnus-summary-prev-page-or-article (&optional lines)
7591   "Show previous page of selected article.
7592 Argument LINES specifies lines to be scrolled down.
7593 If at the beginning of the article, go to the next article."
7594   (interactive "P")
7595   (gnus-summary-prev-page lines t))
7596
7597 (defun gnus-summary-scroll-up (lines)
7598   "Scroll up (or down) one line current article.
7599 Argument LINES specifies lines to be scrolled up (or down if negative)."
7600   (interactive "p")
7601   (gnus-configure-windows 'article)
7602   (gnus-summary-show-thread)
7603   (when (eq (gnus-summary-select-article nil nil 'pseudo) 'old)
7604     (gnus-eval-in-buffer-window gnus-article-buffer
7605       (cond ((> lines 0)
7606              (when (gnus-article-next-page lines)
7607                (gnus-message 3 "End of message")))
7608             ((< lines 0)
7609              (gnus-article-prev-page (- lines))))))
7610   (gnus-summary-recenter)
7611   (gnus-summary-position-point))
7612
7613 (defun gnus-summary-scroll-down (lines)
7614   "Scroll down (or up) one line current article.
7615 Argument LINES specifies lines to be scrolled down (or up if negative)."
7616   (interactive "p")
7617   (gnus-summary-scroll-up (- lines)))
7618
7619 (defun gnus-summary-next-same-subject ()
7620   "Select next article which has the same subject as current one."
7621   (interactive)
7622   (gnus-summary-next-article nil (gnus-summary-article-subject)))
7623
7624 (defun gnus-summary-prev-same-subject ()
7625   "Select previous article which has the same subject as current one."
7626   (interactive)
7627   (gnus-summary-prev-article nil (gnus-summary-article-subject)))
7628
7629 (defun gnus-summary-next-unread-same-subject ()
7630   "Select next unread article which has the same subject as current one."
7631   (interactive)
7632   (gnus-summary-next-article t (gnus-summary-article-subject)))
7633
7634 (defun gnus-summary-prev-unread-same-subject ()
7635   "Select previous unread article which has the same subject as current one."
7636   (interactive)
7637   (gnus-summary-prev-article t (gnus-summary-article-subject)))
7638
7639 (defun gnus-summary-first-unread-article ()
7640   "Select the first unread article.
7641 Return nil if there are no unread articles."
7642   (interactive)
7643   (prog1
7644       (when (gnus-summary-first-subject t)
7645         (gnus-summary-show-thread)
7646         (gnus-summary-first-subject t)
7647         (gnus-summary-display-article (gnus-summary-article-number)))
7648     (gnus-summary-position-point)))
7649
7650 (defun gnus-summary-first-unread-subject ()
7651   "Place the point on the subject line of the first unread article.
7652 Return nil if there are no unread articles."
7653   (interactive)
7654   (prog1
7655       (when (gnus-summary-first-subject t)
7656         (gnus-summary-show-thread)
7657         (gnus-summary-first-subject t))
7658     (gnus-summary-position-point)))
7659
7660 (defun gnus-summary-first-unseen-subject ()
7661   "Place the point on the subject line of the first unseen article.
7662 Return nil if there are no unseen articles."
7663   (interactive)
7664   (prog1
7665       (when (gnus-summary-first-subject nil nil t)
7666         (gnus-summary-show-thread)
7667         (gnus-summary-first-subject nil nil t))
7668     (gnus-summary-position-point)))
7669
7670 (defun gnus-summary-first-unseen-or-unread-subject ()
7671   "Place the point on the subject line of the first unseen article or,
7672 if all article have been seen, on the subject line of the first unread
7673 article."
7674   (interactive)
7675   (prog1
7676       (unless (when (gnus-summary-first-subject nil nil t)
7677                 (gnus-summary-show-thread)
7678                 (gnus-summary-first-subject nil nil t))
7679         (when (gnus-summary-first-subject t)
7680           (gnus-summary-show-thread)
7681           (gnus-summary-first-subject t)))
7682     (gnus-summary-position-point)))
7683
7684 (defun gnus-summary-first-article ()
7685   "Select the first article.
7686 Return nil if there are no articles."
7687   (interactive)
7688   (prog1
7689       (when (gnus-summary-first-subject)
7690         (gnus-summary-show-thread)
7691         (gnus-summary-first-subject)
7692         (gnus-summary-display-article (gnus-summary-article-number)))
7693     (gnus-summary-position-point)))
7694
7695 (defun gnus-summary-best-unread-article (&optional arg)
7696   "Select the unread article with the highest score.
7697 If given a prefix argument, select the next unread article that has a
7698 score higher than the default score."
7699   (interactive "P")
7700   (let ((article (if arg
7701                      (gnus-summary-better-unread-subject)
7702                    (gnus-summary-best-unread-subject))))
7703     (if article
7704         (gnus-summary-goto-article article)
7705       (error "No unread articles"))))
7706
7707 (defun gnus-summary-best-unread-subject ()
7708   "Select the unread subject with the highest score."
7709   (interactive)
7710   (let ((best -1000000)
7711         (data gnus-newsgroup-data)
7712         article score)
7713     (while data
7714       (and (gnus-data-unread-p (car data))
7715            (> (setq score
7716                     (gnus-summary-article-score (gnus-data-number (car data))))
7717               best)
7718            (setq best score
7719                  article (gnus-data-number (car data))))
7720       (setq data (cdr data)))
7721     (when article
7722       (gnus-summary-goto-subject article))
7723     (gnus-summary-position-point)
7724     article))
7725
7726 (defun gnus-summary-better-unread-subject ()
7727   "Select the first unread subject that has a score over the default score."
7728   (interactive)
7729   (let ((data gnus-newsgroup-data)
7730         article score)
7731     (while (and (setq article (gnus-data-number (car data)))
7732                 (or (gnus-data-read-p (car data))
7733                     (not (> (gnus-summary-article-score article)
7734                             gnus-summary-default-score))))
7735       (setq data (cdr data)))
7736     (when article
7737       (gnus-summary-goto-subject article))
7738     (gnus-summary-position-point)
7739     article))
7740
7741 (defun gnus-summary-last-subject ()
7742   "Go to the last displayed subject line in the group."
7743   (let ((article (gnus-data-number (car (gnus-data-list t)))))
7744     (when article
7745       (gnus-summary-goto-subject article))))
7746
7747 (defun gnus-summary-goto-article (article &optional all-headers force)
7748   "Fetch ARTICLE (article number or Message-ID) and display it if it exists.
7749 If ALL-HEADERS is non-nil, no header lines are hidden.
7750 If FORCE, go to the article even if it isn't displayed.  If FORCE
7751 is a number, it is the line the article is to be displayed on."
7752   (interactive
7753    (list
7754     (completing-read
7755      "Article number or Message-ID: "
7756      (mapcar (lambda (number) (list (int-to-string number)))
7757              gnus-newsgroup-limit))
7758     current-prefix-arg
7759     t))
7760   (prog1
7761       (if (and (stringp article)
7762                (string-match "@\\|%40" article))
7763           (gnus-summary-refer-article article)
7764         (when (stringp article)
7765           (setq article (string-to-number article)))
7766         (if (gnus-summary-goto-subject article force)
7767             (gnus-summary-display-article article all-headers)
7768           (gnus-message 4 "Couldn't go to article %s" article) nil))
7769     (gnus-summary-position-point)))
7770
7771 (defun gnus-summary-goto-last-article ()
7772   "Go to the previously read article."
7773   (interactive)
7774   (prog1
7775       (when gnus-last-article
7776         (gnus-summary-goto-article gnus-last-article nil t))
7777     (gnus-summary-position-point)))
7778
7779 (defun gnus-summary-pop-article (number)
7780   "Pop one article off the history and go to the previous.
7781 NUMBER articles will be popped off."
7782   (interactive "p")
7783   (let (to)
7784     (setq gnus-newsgroup-history
7785           (cdr (setq to (nthcdr number gnus-newsgroup-history))))
7786     (if to
7787         (gnus-summary-goto-article (car to) nil t)
7788       (error "Article history empty")))
7789   (gnus-summary-position-point))
7790
7791 ;; Summary commands and functions for limiting the summary buffer.
7792
7793 (defun gnus-summary-limit-to-articles (n)
7794   "Limit the summary buffer to the next N articles.
7795 If not given a prefix, use the process marked articles instead."
7796   (interactive "P")
7797   (prog1
7798       (let ((articles (gnus-summary-work-articles n)))
7799         (setq gnus-newsgroup-processable nil)
7800         (gnus-summary-limit articles))
7801     (gnus-summary-position-point)))
7802
7803 (defun gnus-summary-pop-limit (&optional total)
7804   "Restore the previous limit.
7805 If given a prefix, remove all limits."
7806   (interactive "P")
7807   (when total
7808     (setq gnus-newsgroup-limits
7809           (list (mapcar (lambda (h) (mail-header-number h))
7810                         gnus-newsgroup-headers))))
7811   (unless gnus-newsgroup-limits
7812     (error "No limit to pop"))
7813   (prog1
7814       (gnus-summary-limit nil 'pop)
7815     (gnus-summary-position-point)))
7816
7817 (defun gnus-summary-limit-to-subject (subject &optional header not-matching)
7818   "Limit the summary buffer to articles that have subjects that match a regexp.
7819 If NOT-MATCHING, excluding articles that have subjects that match a regexp."
7820   (interactive
7821    (list (read-string (if current-prefix-arg
7822                           "Exclude subject (regexp): "
7823                         "Limit to subject (regexp): "))
7824          nil current-prefix-arg))
7825   (unless header
7826     (setq header "subject"))
7827   (when (not (equal "" subject))
7828     (prog1
7829         (let ((articles (gnus-summary-find-matching
7830                          (or header "subject") subject 'all nil nil
7831                          not-matching)))
7832           (unless articles
7833             (error "Found no matches for \"%s\"" subject))
7834           (gnus-summary-limit articles))
7835       (gnus-summary-position-point))))
7836
7837 (defun gnus-summary-limit-to-author (from &optional not-matching)
7838   "Limit the summary buffer to articles that have authors that match a regexp.
7839 If NOT-MATCHING, excluding articles that have authors that match a regexp."
7840   (interactive
7841    (list (read-string (if current-prefix-arg
7842                           "Exclude author (regexp): "
7843                         "Limit to author (regexp): "))
7844          current-prefix-arg))
7845   (gnus-summary-limit-to-subject from "from" not-matching))
7846
7847 (defun gnus-summary-limit-to-age (age &optional younger-p)
7848   "Limit the summary buffer to articles that are older than (or equal) AGE days.
7849 If YOUNGER-P (the prefix) is non-nil, limit the summary buffer to
7850 articles that are younger than AGE days."
7851   (interactive
7852    (let ((younger current-prefix-arg)
7853          (days-got nil)
7854          days)
7855      (while (not days-got)
7856        (setq days (if younger
7857                       (read-string "Limit to articles younger than (in days, older when negative): ")
7858                     (read-string
7859                      "Limit to articles older than (in days, younger when negative): ")))
7860        (when (> (length days) 0)
7861          (setq days (read days)))
7862        (if (numberp days)
7863            (progn
7864              (setq days-got t)
7865              (if (< days 0)
7866                  (progn
7867                    (setq younger (not younger))
7868                    (setq days (* days -1)))))
7869          (message "Please enter a number.")
7870          (sleep-for 1)))
7871      (list days younger)))
7872   (prog1
7873       (let ((data gnus-newsgroup-data)
7874             (cutoff (days-to-time age))
7875             articles d date is-younger)
7876         (while (setq d (pop data))
7877           (when (and (vectorp (gnus-data-header d))
7878                      (setq date (mail-header-date (gnus-data-header d))))
7879             (setq is-younger (time-less-p
7880                               (time-since (condition-case ()
7881                                               (date-to-time date)
7882                                             (error '(0 0))))
7883                               cutoff))
7884             (when (if younger-p
7885                       is-younger
7886                     (not is-younger))
7887               (push (gnus-data-number d) articles))))
7888         (gnus-summary-limit (nreverse articles)))
7889     (gnus-summary-position-point)))
7890
7891 (defun gnus-summary-limit-to-extra (header regexp &optional not-matching)
7892   "Limit the summary buffer to articles that match an 'extra' header."
7893   (interactive
7894    (let ((header
7895           (intern
7896            (gnus-completing-read-with-default
7897             (symbol-name (car gnus-extra-headers))
7898             (if current-prefix-arg
7899                 "Exclude extra header"
7900               "Limit extra header")
7901             (mapcar (lambda (x)
7902                       (cons (symbol-name x) x))
7903                     gnus-extra-headers)
7904             nil
7905             t))))
7906      (list header
7907            (read-string (format "%s header %s (regexp): "
7908                                 (if current-prefix-arg "Exclude" "Limit to")
7909                                 header))
7910            current-prefix-arg)))
7911   (when (not (equal "" regexp))
7912     (prog1
7913         (let ((articles (gnus-summary-find-matching
7914                          (cons 'extra header) regexp 'all nil nil
7915                          not-matching)))
7916           (unless articles
7917             (error "Found no matches for \"%s\"" regexp))
7918           (gnus-summary-limit articles))
7919       (gnus-summary-position-point))))
7920
7921 (defun gnus-summary-limit-to-display-predicate ()
7922   "Limit the summary buffer to the predicated in the `display' group parameter."
7923   (interactive)
7924   (unless gnus-newsgroup-display
7925     (error "There is no `display' group parameter"))
7926   (let (articles)
7927     (dolist (number gnus-newsgroup-articles)
7928       (when (funcall gnus-newsgroup-display)
7929         (push number articles)))
7930     (gnus-summary-limit articles))
7931   (gnus-summary-position-point))
7932
7933 (defalias 'gnus-summary-delete-marked-as-read 'gnus-summary-limit-to-unread)
7934 (make-obsolete
7935  'gnus-summary-delete-marked-as-read 'gnus-summary-limit-to-unread)
7936
7937 (defun gnus-summary-limit-to-unread (&optional all)
7938   "Limit the summary buffer to articles that are not marked as read.
7939 If ALL is non-nil, limit strictly to unread articles."
7940   (interactive "P")
7941   (if all
7942       (gnus-summary-limit-to-marks (char-to-string gnus-unread-mark))
7943     (gnus-summary-limit-to-marks
7944      ;; Concat all the marks that say that an article is read and have
7945      ;; those removed.
7946      (list gnus-del-mark gnus-read-mark gnus-ancient-mark
7947            gnus-killed-mark gnus-spam-mark gnus-kill-file-mark
7948            gnus-low-score-mark gnus-expirable-mark
7949            gnus-canceled-mark gnus-catchup-mark gnus-sparse-mark
7950            gnus-duplicate-mark gnus-souped-mark)
7951      'reverse)))
7952
7953 (defalias 'gnus-summary-delete-marked-with 'gnus-summary-limit-exclude-marks)
7954 (make-obsolete 'gnus-summary-delete-marked-with
7955                'gnus-summary-limit-exclude-marks)
7956
7957 (defun gnus-summary-limit-exclude-marks (marks &optional reverse)
7958   "Exclude articles that are marked with MARKS (e.g. \"DK\").
7959 If REVERSE, limit the summary buffer to articles that are marked
7960 with MARKS.  MARKS can either be a string of marks or a list of marks.
7961 Returns how many articles were removed."
7962   (interactive "sMarks: ")
7963   (gnus-summary-limit-to-marks marks t))
7964
7965 (defun gnus-summary-limit-to-marks (marks &optional reverse)
7966   "Limit the summary buffer to articles that are marked with MARKS (e.g. \"DK\").
7967 If REVERSE (the prefix), limit the summary buffer to articles that are
7968 not marked with MARKS.  MARKS can either be a string of marks or a
7969 list of marks.
7970 Returns how many articles were removed."
7971   (interactive "sMarks: \nP")
7972   (prog1
7973       (let ((data gnus-newsgroup-data)
7974             (marks (if (listp marks) marks
7975                      (append marks nil))) ; Transform to list.
7976             articles)
7977         (while data
7978           (when (if reverse (not (memq (gnus-data-mark (car data)) marks))
7979                   (memq (gnus-data-mark (car data)) marks))
7980             (push (gnus-data-number (car data)) articles))
7981           (setq data (cdr data)))
7982         (gnus-summary-limit articles))
7983     (gnus-summary-position-point)))
7984
7985 (defun gnus-summary-limit-to-score (score)
7986   "Limit to articles with score at or above SCORE."
7987   (interactive "NLimit to articles with score of at least: ")
7988   (let ((data gnus-newsgroup-data)
7989         articles)
7990     (while data
7991       (when (>= (gnus-summary-article-score (gnus-data-number (car data)))
7992                 score)
7993         (push (gnus-data-number (car data)) articles))
7994       (setq data (cdr data)))
7995     (prog1
7996         (gnus-summary-limit articles)
7997       (gnus-summary-position-point))))
7998
7999 (defun gnus-summary-limit-to-unseen ()
8000   "Limit to unseen articles."
8001   (interactive)
8002   (prog1
8003       (gnus-summary-limit gnus-newsgroup-unseen)
8004     (gnus-summary-position-point)))
8005
8006 (defun gnus-summary-limit-include-thread (id)
8007   "Display all the hidden articles that is in the thread with ID in it.
8008 When called interactively, ID is the Message-ID of the current
8009 article."
8010   (interactive (list (mail-header-id (gnus-summary-article-header))))
8011   (let ((articles (gnus-articles-in-thread
8012                    (gnus-id-to-thread (gnus-root-id id)))))
8013     (prog1
8014         (gnus-summary-limit (nconc articles gnus-newsgroup-limit))
8015       (gnus-summary-limit-include-matching-articles
8016        "subject"
8017        (regexp-quote (gnus-simplify-subject-re
8018                       (mail-header-subject (gnus-id-to-header id)))))
8019       (gnus-summary-position-point))))
8020
8021 (defun gnus-summary-limit-include-matching-articles (header regexp)
8022   "Display all the hidden articles that have HEADERs that match REGEXP."
8023   (interactive (list (read-string "Match on header: ")
8024                      (read-string "Regexp: ")))
8025   (let ((articles (gnus-find-matching-articles header regexp)))
8026     (prog1
8027         (gnus-summary-limit (nconc articles gnus-newsgroup-limit))
8028       (gnus-summary-position-point))))
8029
8030 (defun gnus-summary-insert-dormant-articles ()
8031   "Insert all the dormant articles for this group into the current buffer."
8032   (interactive)
8033   (let ((gnus-verbose (max 6 gnus-verbose)))
8034     (if (not gnus-newsgroup-dormant)
8035         (gnus-message 3 "No dormant articles for this group")
8036       (gnus-summary-goto-subjects gnus-newsgroup-dormant))))
8037
8038 (defun gnus-summary-limit-include-dormant ()
8039   "Display all the hidden articles that are marked as dormant.
8040 Note that this command only works on a subset of the articles currently
8041 fetched for this group."
8042   (interactive)
8043   (unless gnus-newsgroup-dormant
8044     (error "There are no dormant articles in this group"))
8045   (prog1
8046       (gnus-summary-limit (append gnus-newsgroup-dormant gnus-newsgroup-limit))
8047     (gnus-summary-position-point)))
8048
8049 (defun gnus-summary-limit-exclude-dormant ()
8050   "Hide all dormant articles."
8051   (interactive)
8052   (prog1
8053       (gnus-summary-limit-to-marks (list gnus-dormant-mark) 'reverse)
8054     (gnus-summary-position-point)))
8055
8056 (defun gnus-summary-limit-exclude-childless-dormant ()
8057   "Hide all dormant articles that have no children."
8058   (interactive)
8059   (let ((data (gnus-data-list t))
8060         articles d children)
8061     ;; Find all articles that are either not dormant or have
8062     ;; children.
8063     (while (setq d (pop data))
8064       (when (or (not (= (gnus-data-mark d) gnus-dormant-mark))
8065                 (and (setq children
8066                            (gnus-article-children (gnus-data-number d)))
8067                      (let (found)
8068                        (while children
8069                          (when (memq (car children) articles)
8070                            (setq children nil
8071                                  found t))
8072                          (pop children))
8073                        found)))
8074         (push (gnus-data-number d) articles)))
8075     ;; Do the limiting.
8076     (prog1
8077         (gnus-summary-limit articles)
8078       (gnus-summary-position-point))))
8079
8080 (defun gnus-summary-limit-mark-excluded-as-read (&optional all)
8081   "Mark all unread excluded articles as read.
8082 If ALL, mark even excluded ticked and dormants as read."
8083   (interactive "P")
8084   (setq gnus-newsgroup-limit (sort gnus-newsgroup-limit '<))
8085   (let ((articles (gnus-sorted-ndifference
8086                    (sort
8087                     (mapcar (lambda (h) (mail-header-number h))
8088                             gnus-newsgroup-headers)
8089                     '<)
8090                    gnus-newsgroup-limit))
8091         article)
8092     (setq gnus-newsgroup-unreads
8093           (gnus-sorted-intersection gnus-newsgroup-unreads
8094                                     gnus-newsgroup-limit))
8095     (if all
8096         (setq gnus-newsgroup-dormant nil
8097               gnus-newsgroup-marked nil
8098               gnus-newsgroup-reads
8099               (nconc
8100                (mapcar (lambda (n) (cons n gnus-catchup-mark)) articles)
8101                gnus-newsgroup-reads))
8102       (while (setq article (pop articles))
8103         (unless (or (memq article gnus-newsgroup-dormant)
8104                     (memq article gnus-newsgroup-marked))
8105           (push (cons article gnus-catchup-mark) gnus-newsgroup-reads))))))
8106
8107 (defun gnus-summary-limit (articles &optional pop)
8108   (if pop
8109       ;; We pop the previous limit off the stack and use that.
8110       (setq articles (car gnus-newsgroup-limits)
8111             gnus-newsgroup-limits (cdr gnus-newsgroup-limits))
8112     ;; We use the new limit, so we push the old limit on the stack.
8113     (push gnus-newsgroup-limit gnus-newsgroup-limits))
8114   ;; Set the limit.
8115   (setq gnus-newsgroup-limit articles)
8116   (let ((total (length gnus-newsgroup-data))
8117         (data (gnus-data-find-list (gnus-summary-article-number)))
8118         (gnus-summary-mark-below nil)   ; Inhibit this.
8119         found)
8120     ;; This will do all the work of generating the new summary buffer
8121     ;; according to the new limit.
8122     (gnus-summary-prepare)
8123     ;; Hide any threads, possibly.
8124     (gnus-summary-maybe-hide-threads)
8125     ;; Try to return to the article you were at, or one in the
8126     ;; neighborhood.
8127     (when data
8128       ;; We try to find some article after the current one.
8129       (while data
8130         (when (gnus-summary-goto-subject (gnus-data-number (car data)) nil t)
8131           (setq data nil
8132                 found t))
8133         (setq data (cdr data))))
8134     (unless found
8135       ;; If there is no data, that means that we were after the last
8136       ;; article.  The same goes when we can't find any articles
8137       ;; after the current one.
8138       (goto-char (point-max))
8139       (gnus-summary-find-prev))
8140     (gnus-set-mode-line 'summary)
8141     ;; We return how many articles were removed from the summary
8142     ;; buffer as a result of the new limit.
8143     (- total (length gnus-newsgroup-data))))
8144
8145 (defsubst gnus-invisible-cut-children (threads)
8146   (let ((num 0))
8147     (while threads
8148       (when (memq (mail-header-number (caar threads)) gnus-newsgroup-limit)
8149         (incf num))
8150       (pop threads))
8151     (< num 2)))
8152
8153 (defsubst gnus-cut-thread (thread)
8154   "Go forwards in the thread until we find an article that we want to display."
8155   (when (or (eq gnus-fetch-old-headers 'some)
8156             (eq gnus-fetch-old-headers 'invisible)
8157             (numberp gnus-fetch-old-headers)
8158             (eq gnus-build-sparse-threads 'some)
8159             (eq gnus-build-sparse-threads 'more))
8160     ;; Deal with old-fetched headers and sparse threads.
8161     (while (and
8162             thread
8163             (or
8164              (gnus-summary-article-sparse-p (mail-header-number (car thread)))
8165              (gnus-summary-article-ancient-p
8166               (mail-header-number (car thread))))
8167             (if (or (<= (length (cdr thread)) 1)
8168                     (eq gnus-fetch-old-headers 'invisible))
8169                 (setq gnus-newsgroup-limit
8170                       (delq (mail-header-number (car thread))
8171                             gnus-newsgroup-limit)
8172                       thread (cadr thread))
8173               (when (gnus-invisible-cut-children (cdr thread))
8174                 (let ((th (cdr thread)))
8175                   (while th
8176                     (if (memq (mail-header-number (caar th))
8177                               gnus-newsgroup-limit)
8178                         (setq thread (car th)
8179                               th nil)
8180                       (setq th (cdr th))))))))))
8181   thread)
8182
8183 (defun gnus-cut-threads (threads)
8184   "Cut off all uninteresting articles from the beginning of THREADS."
8185   (when (or (eq gnus-fetch-old-headers 'some)
8186             (eq gnus-fetch-old-headers 'invisible)
8187             (numberp gnus-fetch-old-headers)
8188             (eq gnus-build-sparse-threads 'some)
8189             (eq gnus-build-sparse-threads 'more))
8190     (let ((th threads))
8191       (while th
8192         (setcar th (gnus-cut-thread (car th)))
8193         (setq th (cdr th)))))
8194   ;; Remove nixed out threads.
8195   (delq nil threads))
8196
8197 (defun gnus-summary-initial-limit (&optional show-if-empty)
8198   "Figure out what the initial limit is supposed to be on group entry.
8199 This entails weeding out unwanted dormants, low-scored articles,
8200 fetch-old-headers verbiage, and so on."
8201   ;; Most groups have nothing to remove.
8202   (if (or gnus-inhibit-limiting
8203           (and (null gnus-newsgroup-dormant)
8204                (eq gnus-newsgroup-display 'gnus-not-ignore)
8205                (not (eq gnus-fetch-old-headers 'some))
8206                (not (numberp gnus-fetch-old-headers))
8207                (not (eq gnus-fetch-old-headers 'invisible))
8208                (null gnus-summary-expunge-below)
8209                (not (eq gnus-build-sparse-threads 'some))
8210                (not (eq gnus-build-sparse-threads 'more))
8211                (null gnus-thread-expunge-below)
8212                (not gnus-use-nocem)))
8213       ()                                ; Do nothing.
8214     (push gnus-newsgroup-limit gnus-newsgroup-limits)
8215     (setq gnus-newsgroup-limit nil)
8216     (mapatoms
8217      (lambda (node)
8218        (unless (car (symbol-value node))
8219          ;; These threads have no parents -- they are roots.
8220          (let ((nodes (cdr (symbol-value node)))
8221                thread)
8222            (while nodes
8223              (if (and gnus-thread-expunge-below
8224                       (< (gnus-thread-total-score (car nodes))
8225                          gnus-thread-expunge-below))
8226                  (gnus-expunge-thread (pop nodes))
8227                (setq thread (pop nodes))
8228                (gnus-summary-limit-children thread))))))
8229      gnus-newsgroup-dependencies)
8230     ;; If this limitation resulted in an empty group, we might
8231     ;; pop the previous limit and use it instead.
8232     (when (and (not gnus-newsgroup-limit)
8233                show-if-empty)
8234       (setq gnus-newsgroup-limit (pop gnus-newsgroup-limits)))
8235     gnus-newsgroup-limit))
8236
8237 (defun gnus-summary-limit-children (thread)
8238   "Return 1 if this subthread is visible and 0 if it is not."
8239   ;; First we get the number of visible children to this thread.  This
8240   ;; is done by recursing down the thread using this function, so this
8241   ;; will really go down to a leaf article first, before slowly
8242   ;; working its way up towards the root.
8243   (when thread
8244     (let* ((max-lisp-eval-depth (max 5000 max-lisp-eval-depth))
8245            (children
8246            (if (cdr thread)
8247                (apply '+ (mapcar 'gnus-summary-limit-children
8248                                  (cdr thread)))
8249              0))
8250           (number (mail-header-number (car thread)))
8251           score)
8252       (if (and
8253            (not (memq number gnus-newsgroup-marked))
8254            (or
8255             ;; If this article is dormant and has absolutely no visible
8256             ;; children, then this article isn't visible.
8257             (and (memq number gnus-newsgroup-dormant)
8258                  (zerop children))
8259             ;; If this is "fetch-old-headered" and there is no
8260             ;; visible children, then we don't want this article.
8261             (and (or (eq gnus-fetch-old-headers 'some)
8262                      (numberp gnus-fetch-old-headers))
8263                  (gnus-summary-article-ancient-p number)
8264                  (zerop children))
8265             ;; If this is "fetch-old-headered" and `invisible', then
8266             ;; we don't want this article.
8267             (and (eq gnus-fetch-old-headers 'invisible)
8268                  (gnus-summary-article-ancient-p number))
8269             ;; If this is a sparsely inserted article with no children,
8270             ;; we don't want it.
8271             (and (eq gnus-build-sparse-threads 'some)
8272                  (gnus-summary-article-sparse-p number)
8273                  (zerop children))
8274             ;; If we use expunging, and this article is really
8275             ;; low-scored, then we don't want this article.
8276             (when (and gnus-summary-expunge-below
8277                        (< (setq score
8278                                 (or (cdr (assq number gnus-newsgroup-scored))
8279                                     gnus-summary-default-score))
8280                           gnus-summary-expunge-below))
8281               ;; We increase the expunge-tally here, but that has
8282               ;; nothing to do with the limits, really.
8283               (incf gnus-newsgroup-expunged-tally)
8284               ;; We also mark as read here, if that's wanted.
8285               (when (and gnus-summary-mark-below
8286                          (< score gnus-summary-mark-below))
8287                 (setq gnus-newsgroup-unreads
8288                       (delq number gnus-newsgroup-unreads))
8289                 (if gnus-newsgroup-auto-expire
8290                     (push number gnus-newsgroup-expirable)
8291                   (push (cons number gnus-low-score-mark)
8292                         gnus-newsgroup-reads)))
8293               t)
8294             ;; Do the `display' group parameter.
8295             (and gnus-newsgroup-display
8296                  (not (funcall gnus-newsgroup-display)))
8297             ;; Check NoCeM things.
8298             (if (and gnus-use-nocem
8299                      (gnus-nocem-unwanted-article-p
8300                       (mail-header-id (car thread))))
8301                 (progn
8302                   (setq gnus-newsgroup-unreads
8303                         (delq number gnus-newsgroup-unreads))
8304                   t))))
8305           ;; Nope, invisible article.
8306           0
8307         ;; Ok, this article is to be visible, so we add it to the limit
8308         ;; and return 1.
8309         (push number gnus-newsgroup-limit)
8310         1))))
8311
8312 (defun gnus-expunge-thread (thread)
8313   "Mark all articles in THREAD as read."
8314   (let* ((number (mail-header-number (car thread))))
8315     (incf gnus-newsgroup-expunged-tally)
8316     ;; We also mark as read here, if that's wanted.
8317     (setq gnus-newsgroup-unreads
8318           (delq number gnus-newsgroup-unreads))
8319     (if gnus-newsgroup-auto-expire
8320         (push number gnus-newsgroup-expirable)
8321       (push (cons number gnus-low-score-mark)
8322             gnus-newsgroup-reads)))
8323   ;; Go recursively through all subthreads.
8324   (mapcar 'gnus-expunge-thread (cdr thread)))
8325
8326 ;; Summary article oriented commands
8327
8328 (defun gnus-summary-refer-parent-article (n)
8329   "Refer parent article N times.
8330 If N is negative, go to ancestor -N instead.
8331 The difference between N and the number of articles fetched is returned."
8332   (interactive "p")
8333   (let ((skip 1)
8334         error header ref)
8335     (when (not (natnump n))
8336       (setq skip (abs n)
8337             n 1))
8338     (while (and (> n 0)
8339                 (not error))
8340       (setq header (gnus-summary-article-header))
8341       (if (and (eq (mail-header-number header)
8342                    (cdr gnus-article-current))
8343                (equal gnus-newsgroup-name
8344                       (car gnus-article-current)))
8345           ;; If we try to find the parent of the currently
8346           ;; displayed article, then we take a look at the actual
8347           ;; References header, since this is slightly more
8348           ;; reliable than the References field we got from the
8349           ;; server.
8350           (save-excursion
8351             (set-buffer gnus-original-article-buffer)
8352             (nnheader-narrow-to-headers)
8353             (unless (setq ref (message-fetch-field "references"))
8354               (when (setq ref (message-fetch-field "in-reply-to"))
8355                 (setq ref (gnus-extract-message-id-from-in-reply-to ref))))
8356             (widen))
8357         (setq ref
8358               ;; It's not the current article, so we take a bet on
8359               ;; the value we got from the server.
8360               (mail-header-references header)))
8361       (if (and ref
8362                (not (equal ref "")))
8363           (unless (gnus-summary-refer-article (gnus-parent-id ref skip))
8364             (gnus-message 1 "Couldn't find parent"))
8365         (gnus-message 1 "No references in article %d"
8366                       (gnus-summary-article-number))
8367         (setq error t))
8368       (decf n))
8369     (gnus-summary-position-point)
8370     n))
8371
8372 (defun gnus-summary-refer-references ()
8373   "Fetch all articles mentioned in the References header.
8374 Return the number of articles fetched."
8375   (interactive)
8376   (let ((ref (mail-header-references (gnus-summary-article-header)))
8377         (current (gnus-summary-article-number))
8378         (n 0))
8379     (if (or (not ref)
8380             (equal ref ""))
8381         (error "No References in the current article")
8382       ;; For each Message-ID in the References header...
8383       (while (string-match "<[^>]*>" ref)
8384         (incf n)
8385         ;; ... fetch that article.
8386         (gnus-summary-refer-article
8387          (prog1 (match-string 0 ref)
8388            (setq ref (substring ref (match-end 0))))))
8389       (gnus-summary-goto-subject current)
8390       (gnus-summary-position-point)
8391       n)))
8392
8393 (defun gnus-summary-refer-thread (&optional limit)
8394   "Fetch all articles in the current thread.
8395 If LIMIT (the numerical prefix), fetch that many old headers instead
8396 of what's specified by the `gnus-refer-thread-limit' variable."
8397   (interactive "P")
8398   (let ((id (mail-header-id (gnus-summary-article-header)))
8399         (limit (if limit (prefix-numeric-value limit)
8400                  gnus-refer-thread-limit)))
8401     (unless (eq gnus-fetch-old-headers 'invisible)
8402       (gnus-message 5 "Fetching headers for %s..." gnus-newsgroup-name)
8403       ;; Retrieve the headers and read them in.
8404       (if (eq (if (numberp limit)
8405                   (gnus-retrieve-headers
8406                    (list (min
8407                           (+ (mail-header-number
8408                               (gnus-summary-article-header))
8409                              limit)
8410                           gnus-newsgroup-end))
8411                    gnus-newsgroup-name (* limit 2))
8412                 ;; gnus-refer-thread-limit is t, i.e. fetch _all_
8413                 ;; headers.
8414                 (gnus-retrieve-headers (list gnus-newsgroup-end)
8415                                        gnus-newsgroup-name limit))
8416               'nov)
8417           (gnus-build-all-threads)
8418         (error "Can't fetch thread from back ends that don't support NOV"))
8419       (gnus-message 5 "Fetching headers for %s...done" gnus-newsgroup-name))
8420     (gnus-summary-limit-include-thread id)))
8421
8422 (defun gnus-summary-refer-article (message-id)
8423   "Fetch an article specified by MESSAGE-ID."
8424   (interactive "sMessage-ID: ")
8425   (when (and (stringp message-id)
8426              (not (zerop (length message-id))))
8427     (setq message-id (gnus-replace-in-string message-id " " ""))
8428     ;; Construct the correct Message-ID if necessary.
8429     ;; Suggested by tale@pawl.rpi.edu.
8430     (unless (string-match "^<" message-id)
8431       (setq message-id (concat "<" message-id)))
8432     (unless (string-match ">$" message-id)
8433       (setq message-id (concat message-id ">")))
8434     ;; People often post MIDs from URLs, so unhex it:
8435     (unless (string-match "@" message-id)
8436       (setq message-id (gnus-url-unhex-string message-id)))
8437     (let* ((header (gnus-id-to-header message-id))
8438            (sparse (and header
8439                         (gnus-summary-article-sparse-p
8440                          (mail-header-number header))
8441                         (memq (mail-header-number header)
8442                               gnus-newsgroup-limit)))
8443            number)
8444       (cond
8445        ;; If the article is present in the buffer we just go to it.
8446        ((and header
8447              (or (not (gnus-summary-article-sparse-p
8448                        (mail-header-number header)))
8449                  sparse))
8450         (prog1
8451             (gnus-summary-goto-article
8452              (mail-header-number header) nil t)
8453           (when sparse
8454             (gnus-summary-update-article (mail-header-number header)))))
8455        (t
8456         ;; We fetch the article.
8457         (catch 'found
8458           (dolist (gnus-override-method (gnus-refer-article-methods))
8459             (when (and (gnus-check-server gnus-override-method)
8460                        ;; Fetch the header,
8461                        (setq number (gnus-summary-insert-subject message-id)))
8462               ;; and display the article.
8463               (gnus-summary-select-article nil nil nil number)
8464               (throw 'found t)))
8465           (gnus-message 3 "Couldn't fetch article %s" message-id)))))))
8466
8467 (defun gnus-refer-article-methods ()
8468   "Return a list of referable methods."
8469   (cond
8470    ;; No method, so we default to current and native.
8471    ((null gnus-refer-article-method)
8472     (list gnus-current-select-method gnus-select-method))
8473    ;; Current.
8474    ((eq 'current gnus-refer-article-method)
8475     (list gnus-current-select-method))
8476    ;; List of select methods.
8477    ((not (and (symbolp (car gnus-refer-article-method))
8478               (assq (car gnus-refer-article-method) nnoo-definition-alist)))
8479     (let (out)
8480       (dolist (method gnus-refer-article-method)
8481         (push (if (eq 'current method)
8482                   gnus-current-select-method
8483                 method)
8484               out))
8485       (nreverse out)))
8486    ;; One single select method.
8487    (t
8488     (list gnus-refer-article-method))))
8489
8490 (defun gnus-summary-edit-parameters ()
8491   "Edit the group parameters of the current group."
8492   (interactive)
8493   (gnus-group-edit-group gnus-newsgroup-name 'params))
8494
8495 (defun gnus-summary-customize-parameters ()
8496   "Customize the group parameters of the current group."
8497   (interactive)
8498   (gnus-group-customize gnus-newsgroup-name))
8499
8500 (defun gnus-summary-enter-digest-group (&optional force)
8501   "Enter an nndoc group based on the current article.
8502 If FORCE, force a digest interpretation.  If not, try
8503 to guess what the document format is."
8504   (interactive "P")
8505   (let ((conf gnus-current-window-configuration))
8506     (save-window-excursion
8507       (save-excursion
8508         (let (gnus-article-prepare-hook
8509               gnus-display-mime-function
8510               gnus-break-pages)
8511           (gnus-summary-select-article))))
8512     (setq gnus-current-window-configuration conf)
8513     (let* ((name (format "%s-%d"
8514                          (gnus-group-prefixed-name
8515                           gnus-newsgroup-name (list 'nndoc ""))
8516                          (save-excursion
8517                            (set-buffer gnus-summary-buffer)
8518                            gnus-current-article)))
8519            (ogroup gnus-newsgroup-name)
8520            (params (append (gnus-info-params (gnus-get-info ogroup))
8521                            (list (cons 'to-group ogroup))
8522                            (list (cons 'parent-group ogroup))
8523                            (list (cons 'save-article-group ogroup))))
8524            (case-fold-search t)
8525            (buf (current-buffer))
8526            dig to-address)
8527       (save-excursion
8528         (set-buffer gnus-original-article-buffer)
8529         ;; Have the digest group inherit the main mail address of
8530         ;; the parent article.
8531         (when (setq to-address (or (gnus-fetch-field "reply-to")
8532                                    (gnus-fetch-field "from")))
8533           (setq params
8534                 (append
8535                  (list (cons 'to-address
8536                              (funcall gnus-decode-encoded-address-function
8537                                       to-address))))))
8538         (setq dig (nnheader-set-temp-buffer " *gnus digest buffer*"))
8539         (insert-buffer-substring gnus-original-article-buffer)
8540         ;; Remove lines that may lead nndoc to misinterpret the
8541         ;; document type.
8542         (narrow-to-region
8543          (goto-char (point-min))
8544          (or (search-forward "\n\n" nil t) (point)))
8545         (goto-char (point-min))
8546         (delete-matching-lines "^Path:\\|^From ")
8547         (widen))
8548       (unwind-protect
8549           (if (let ((gnus-newsgroup-ephemeral-charset gnus-newsgroup-charset)
8550                     (gnus-newsgroup-ephemeral-ignored-charsets
8551                      gnus-newsgroup-ignored-charsets))
8552                 (gnus-group-read-ephemeral-group
8553                  name `(nndoc ,name (nndoc-address ,(get-buffer dig))
8554                               (nndoc-article-type
8555                                ,(if force 'mbox 'guess)))
8556                  t nil nil nil
8557                  `((adapt-file . ,(gnus-score-file-name gnus-newsgroup-name
8558                                                         "ADAPT")))))
8559               ;; Make all postings to this group go to the parent group.
8560               (nconc (gnus-info-params (gnus-get-info name))
8561                      params)
8562             ;; Couldn't select this doc group.
8563             (switch-to-buffer buf)
8564             (gnus-set-global-variables)
8565             (gnus-configure-windows 'summary)
8566             (gnus-message 3 "Article couldn't be entered?"))
8567         (kill-buffer dig)))))
8568
8569 (defun gnus-summary-read-document (n)
8570   "Open a new group based on the current article(s).
8571 This will allow you to read digests and other similar
8572 documents as newsgroups.
8573 Obeys the standard process/prefix convention."
8574   (interactive "P")
8575   (let* ((articles (gnus-summary-work-articles n))
8576          (ogroup gnus-newsgroup-name)
8577          (params (append (gnus-info-params (gnus-get-info ogroup))
8578                          (list (cons 'to-group ogroup))))
8579          article group egroup groups vgroup)
8580     (while (setq article (pop articles))
8581       (setq group (format "%s-%d" gnus-newsgroup-name article))
8582       (gnus-summary-remove-process-mark article)
8583       (when (gnus-summary-display-article article)
8584         (save-excursion
8585           (with-temp-buffer
8586             (insert-buffer-substring gnus-original-article-buffer)
8587             ;; Remove some headers that may lead nndoc to make
8588             ;; the wrong guess.
8589             (message-narrow-to-head)
8590             (goto-char (point-min))
8591             (delete-matching-lines "^\\(Path\\):\\|^From ")
8592             (widen)
8593             (if (setq egroup
8594                       (gnus-group-read-ephemeral-group
8595                        group `(nndoc ,group (nndoc-address ,(current-buffer))
8596                                      (nndoc-article-type guess))
8597                        t nil t))
8598                 (progn
8599             ;; Make all postings to this group go to the parent group.
8600                   (nconc (gnus-info-params (gnus-get-info egroup))
8601                          params)
8602                   (push egroup groups))
8603               ;; Couldn't select this doc group.
8604               (gnus-error 3 "Article couldn't be entered"))))))
8605     ;; Now we have selected all the documents.
8606     (cond
8607      ((not groups)
8608       (error "None of the articles could be interpreted as documents"))
8609      ((gnus-group-read-ephemeral-group
8610        (setq vgroup (format
8611                      "nnvirtual:%s-%s" gnus-newsgroup-name
8612                      (format-time-string "%Y%m%dT%H%M%S" (current-time))))
8613        `(nnvirtual ,vgroup (nnvirtual-component-groups ,groups))
8614        t
8615        (cons (current-buffer) 'summary)))
8616      (t
8617       (error "Couldn't select virtual nndoc group")))))
8618
8619 (defun gnus-summary-isearch-article (&optional regexp-p)
8620   "Do incremental search forward on the current article.
8621 If REGEXP-P (the prefix) is non-nil, do regexp isearch."
8622   (interactive "P")
8623   (gnus-summary-select-article)
8624   (gnus-configure-windows 'article)
8625   (gnus-eval-in-buffer-window gnus-article-buffer
8626     (save-restriction
8627       (widen)
8628       (isearch-forward regexp-p))))
8629
8630 (defun gnus-summary-search-article-forward (regexp &optional backward)
8631   "Search for an article containing REGEXP forward.
8632 If BACKWARD, search backward instead."
8633   (interactive
8634    (list (read-string
8635           (format "Search article %s (regexp%s): "
8636                   (if current-prefix-arg "backward" "forward")
8637                   (if gnus-last-search-regexp
8638                       (concat ", default " gnus-last-search-regexp)
8639                     "")))
8640          current-prefix-arg))
8641   (if (string-equal regexp "")
8642       (setq regexp (or gnus-last-search-regexp ""))
8643     (setq gnus-last-search-regexp regexp)
8644     (setq gnus-article-before-search gnus-current-article))
8645   ;; Intentionally set gnus-last-article.
8646   (setq gnus-last-article gnus-article-before-search)
8647   (let ((gnus-last-article gnus-last-article))
8648     (if (gnus-summary-search-article regexp backward)
8649         (gnus-summary-show-thread)
8650       (signal 'search-failed (list regexp)))))
8651
8652 (defun gnus-summary-search-article-backward (regexp)
8653   "Search for an article containing REGEXP backward."
8654   (interactive
8655    (list (read-string
8656           (format "Search article backward (regexp%s): "
8657                   (if gnus-last-search-regexp
8658                       (concat ", default " gnus-last-search-regexp)
8659                     "")))))
8660   (gnus-summary-search-article-forward regexp 'backward))
8661
8662 (defun gnus-summary-search-article (regexp &optional backward)
8663   "Search for an article containing REGEXP.
8664 Optional argument BACKWARD means do search for backward.
8665 `gnus-select-article-hook' is not called during the search."
8666   ;; We have to require this here to make sure that the following
8667   ;; dynamic binding isn't shadowed by autoloading.
8668   (require 'gnus-async)
8669   (require 'gnus-art)
8670   (let ((gnus-select-article-hook nil)  ;Disable hook.
8671         (gnus-article-prepare-hook nil)
8672         (gnus-mark-article-hook nil)    ;Inhibit marking as read.
8673         (gnus-use-article-prefetch nil)
8674         (gnus-xmas-force-redisplay nil) ;Inhibit XEmacs redisplay.
8675         (gnus-use-trees nil)            ;Inhibit updating tree buffer.
8676         (gnus-visual nil)
8677         (gnus-keep-backlog nil)
8678         (gnus-break-pages nil)
8679         (gnus-summary-display-arrow nil)
8680         (gnus-updated-mode-lines nil)
8681         (gnus-auto-center-summary nil)
8682         (sum (current-buffer))
8683         (gnus-display-mime-function nil)
8684         (found nil)
8685         point)
8686     (gnus-save-hidden-threads
8687       (gnus-summary-select-article)
8688       (set-buffer gnus-article-buffer)
8689       (goto-char (window-point (get-buffer-window (current-buffer))))
8690       (when backward
8691         (forward-line -1))
8692       (while (not found)
8693         (gnus-message 7 "Searching article: %d..." (cdr gnus-article-current))
8694         (if (if backward
8695                 (re-search-backward regexp nil t)
8696               (re-search-forward regexp nil t))
8697             ;; We found the regexp.
8698             (progn
8699               (setq found 'found)
8700               (beginning-of-line)
8701               (set-window-start
8702                (get-buffer-window (current-buffer))
8703                (point))
8704               (forward-line 1)
8705               (set-window-point
8706                (get-buffer-window (current-buffer))
8707                (point))
8708               (set-buffer sum)
8709               (setq point (point)))
8710           ;; We didn't find it, so we go to the next article.
8711           (set-buffer sum)
8712           (setq found 'not)
8713           (while (eq found 'not)
8714             (if (not (if backward (gnus-summary-find-prev)
8715                        (gnus-summary-find-next)))
8716                 ;; No more articles.
8717                 (setq found t)
8718               ;; Select the next article and adjust point.
8719               (unless (gnus-summary-article-sparse-p
8720                        (gnus-summary-article-number))
8721                 (setq found nil)
8722                 (gnus-summary-select-article)
8723                 (set-buffer gnus-article-buffer)
8724                 (widen)
8725                 (goto-char (if backward (point-max) (point-min))))))))
8726       (gnus-message 7 ""))
8727     ;; Return whether we found the regexp.
8728     (when (eq found 'found)
8729       (goto-char point)
8730       (gnus-summary-show-thread)
8731       (gnus-summary-goto-subject gnus-current-article)
8732       (gnus-summary-position-point)
8733       t)))
8734
8735 (defun gnus-find-matching-articles (header regexp)
8736   "Return a list of all articles that match REGEXP on HEADER.
8737 This search includes all articles in the current group that Gnus has
8738 fetched headers for, whether they are displayed or not."
8739   (let ((articles nil)
8740         (func `(lambda (h) (,(intern (concat "mail-header-" header)) h)))
8741         (case-fold-search t))
8742     (dolist (header gnus-newsgroup-headers)
8743       (when (string-match regexp (funcall func header))
8744         (push (mail-header-number header) articles)))
8745     (nreverse articles)))
8746
8747 (defun gnus-summary-find-matching (header regexp &optional backward unread
8748                                           not-case-fold not-matching)
8749   "Return a list of all articles that match REGEXP on HEADER.
8750 The search stars on the current article and goes forwards unless
8751 BACKWARD is non-nil.  If BACKWARD is `all', do all articles.
8752 If UNREAD is non-nil, only unread articles will
8753 be taken into consideration.  If NOT-CASE-FOLD, case won't be folded
8754 in the comparisons. If NOT-MATCHING, return a list of all articles that
8755 not match REGEXP on HEADER."
8756   (let ((case-fold-search (not not-case-fold))
8757         articles d func)
8758     (if (consp header)
8759         (if (eq (car header) 'extra)
8760             (setq func
8761                   `(lambda (h)
8762                      (or (cdr (assq ',(cdr header) (mail-header-extra h)))
8763                          "")))
8764           (error "%s is an invalid header" header))
8765       (unless (fboundp (intern (concat "mail-header-" header)))
8766         (error "%s is not a valid header" header))
8767       (setq func `(lambda (h) (,(intern (concat "mail-header-" header)) h))))
8768     (dolist (d (if (eq backward 'all)
8769                    gnus-newsgroup-data
8770                  (gnus-data-find-list
8771                   (gnus-summary-article-number)
8772                   (gnus-data-list backward))))
8773       (when (and (or (not unread)       ; We want all articles...
8774                      (gnus-data-unread-p d)) ; Or just unreads.
8775                  (vectorp (gnus-data-header d)) ; It's not a pseudo.
8776                  (if not-matching
8777                      (not (string-match
8778                            regexp
8779                            (funcall func (gnus-data-header d))))
8780                    (string-match regexp
8781                                  (funcall func (gnus-data-header d)))))
8782         (push (gnus-data-number d) articles))) ; Success!
8783     (nreverse articles)))
8784
8785 (defun gnus-summary-execute-command (header regexp command &optional backward)
8786   "Search forward for an article whose HEADER matches REGEXP and execute COMMAND.
8787 If HEADER is an empty string (or nil), the match is done on the entire
8788 article.  If BACKWARD (the prefix) is non-nil, search backward instead."
8789   (interactive
8790    (list (let ((completion-ignore-case t))
8791            (completing-read
8792             "Header name: "
8793             (mapcar (lambda (header) (list (format "%s" header)))
8794                     (append
8795                      '("Number" "Subject" "From" "Lines" "Date"
8796                        "Message-ID" "Xref" "References" "Body")
8797                      gnus-extra-headers))
8798             nil 'require-match))
8799          (read-string "Regexp: ")
8800          (read-key-sequence "Command: ")
8801          current-prefix-arg))
8802   (when (equal header "Body")
8803     (setq header ""))
8804   ;; Hidden thread subtrees must be searched as well.
8805   (gnus-summary-show-all-threads)
8806   ;; We don't want to change current point nor window configuration.
8807   (save-excursion
8808     (save-window-excursion
8809       (let (gnus-visual
8810             gnus-treat-strip-trailing-blank-lines
8811             gnus-treat-strip-leading-blank-lines
8812             gnus-treat-strip-multiple-blank-lines
8813             gnus-treat-hide-boring-headers
8814             gnus-treat-fold-newsgroups
8815             gnus-article-prepare-hook)
8816         (gnus-message 6 "Executing %s..." (key-description command))
8817         ;; We'd like to execute COMMAND interactively so as to give arguments.
8818         (gnus-execute header regexp
8819                       `(call-interactively ',(key-binding command))
8820                       backward)
8821         (gnus-message 6 "Executing %s...done" (key-description command))))))
8822
8823 (defun gnus-summary-beginning-of-article ()
8824   "Scroll the article back to the beginning."
8825   (interactive)
8826   (gnus-summary-select-article)
8827   (gnus-configure-windows 'article)
8828   (gnus-eval-in-buffer-window gnus-article-buffer
8829     (widen)
8830     (goto-char (point-min))
8831     (when gnus-break-pages
8832       (gnus-narrow-to-page))))
8833
8834 (defun gnus-summary-end-of-article ()
8835   "Scroll to the end of the article."
8836   (interactive)
8837   (gnus-summary-select-article)
8838   (gnus-configure-windows 'article)
8839   (gnus-eval-in-buffer-window gnus-article-buffer
8840     (widen)
8841     (goto-char (point-max))
8842     (recenter -3)
8843     (when gnus-break-pages
8844       (when (re-search-backward page-delimiter nil t)
8845         (narrow-to-region (match-end 0) (point-max)))
8846       (gnus-narrow-to-page))))
8847
8848 (defun gnus-summary-print-truncate-and-quote (string &optional len)
8849   "Truncate to LEN and quote all \"(\"'s in STRING."
8850   (gnus-replace-in-string (if (and len (> (length string) len))
8851                               (substring string 0 len)
8852                             string)
8853                           "[()]" "\\\\\\&"))
8854
8855 (defun gnus-summary-print-article (&optional filename n)
8856   "Generate and print a PostScript image of the process-marked (mail) articles.
8857
8858 If used interactively, print the current article if none are
8859 process-marked.  With prefix arg, prompt the user for the name of the
8860 file to save in.
8861
8862 When used from Lisp, accept two optional args FILENAME and N.  N means
8863 to print the next N articles.  If N is negative, print the N previous
8864 articles.  If N is nil and articles have been marked with the process
8865 mark, print these instead.
8866
8867 If the optional first argument FILENAME is nil, send the image to the
8868 printer.  If FILENAME is a string, save the PostScript image in a file with
8869 that name.  If FILENAME is a number, prompt the user for the name of the file
8870 to save in."
8871   (interactive (list (ps-print-preprint current-prefix-arg)))
8872   (dolist (article (gnus-summary-work-articles n))
8873     (gnus-summary-select-article nil nil 'pseudo article)
8874     (gnus-eval-in-buffer-window gnus-article-buffer
8875       (gnus-print-buffer))
8876     (gnus-summary-remove-process-mark article))
8877   (ps-despool filename))
8878
8879 (defun gnus-print-buffer ()
8880   (let ((buffer (generate-new-buffer " *print*")))
8881     (unwind-protect
8882         (progn
8883           (copy-to-buffer buffer (point-min) (point-max))
8884           (set-buffer buffer)
8885           (gnus-remove-text-with-property 'gnus-decoration)
8886           (when (gnus-visual-p 'article-highlight 'highlight)
8887             ;; Copy-to-buffer doesn't copy overlay.  So redo
8888             ;; highlight.
8889             (let ((gnus-article-buffer buffer))
8890               (gnus-article-highlight-citation t)
8891               (gnus-article-highlight-signature)
8892               (gnus-article-emphasize)
8893               (gnus-article-delete-invisible-text)))
8894           (let ((ps-left-header
8895                  (list
8896                   (concat "("
8897                           (gnus-summary-print-truncate-and-quote
8898                            (mail-header-subject gnus-current-headers)
8899                            66) ")")
8900                   (concat "("
8901                           (gnus-summary-print-truncate-and-quote
8902                            (mail-header-from gnus-current-headers)
8903                            45) ")")))
8904                 (ps-right-header
8905                  (list
8906                   "/pagenumberstring load"
8907                   (concat "("
8908                           (mail-header-date gnus-current-headers) ")"))))
8909             (gnus-run-hooks 'gnus-ps-print-hook)
8910             (save-excursion
8911               (if window-system
8912                   (ps-spool-buffer-with-faces)
8913                 (ps-spool-buffer)))))
8914       (kill-buffer buffer))))
8915
8916 (defun gnus-summary-show-article (&optional arg)
8917   "Force redisplaying of the current article.
8918 If ARG (the prefix) is a number, show the article with the charset
8919 defined in `gnus-summary-show-article-charset-alist', or the charset
8920 input.
8921 If ARG (the prefix) is non-nil and not a number, show the raw article
8922 without any article massaging functions being run.  Normally, the key
8923 strokes are `C-u g'."
8924   (interactive "P")
8925   (cond
8926    ((numberp arg)
8927     (gnus-summary-show-article t)
8928     (let ((gnus-newsgroup-charset
8929            (or (cdr (assq arg gnus-summary-show-article-charset-alist))
8930                (mm-read-coding-system
8931                 "View as charset: " ;; actually it is coding system.
8932                 (save-excursion
8933                   (set-buffer gnus-article-buffer)
8934                   (mm-detect-coding-region (point) (point-max))))))
8935           (gnus-newsgroup-ignored-charsets 'gnus-all))
8936       (gnus-summary-select-article nil 'force)
8937       (let ((deps gnus-newsgroup-dependencies)
8938             head header lines)
8939         (save-excursion
8940           (set-buffer gnus-original-article-buffer)
8941           (save-restriction
8942             (message-narrow-to-head)
8943             (setq head (buffer-string))
8944             (goto-char (point-min))
8945             (unless (re-search-forward "^lines:[ \t]\\([0-9]+\\)" nil t)
8946               (goto-char (point-max))
8947               (widen)
8948               (setq lines (1- (count-lines (point) (point-max))))))
8949           (with-temp-buffer
8950             (insert (format "211 %d Article retrieved.\n"
8951                             (cdr gnus-article-current)))
8952             (insert head)
8953             (if lines (insert (format "Lines: %d\n" lines)))
8954             (insert ".\n")
8955             (let ((nntp-server-buffer (current-buffer)))
8956               (setq header (car (gnus-get-newsgroup-headers deps t))))))
8957         (gnus-data-set-header
8958          (gnus-data-find (cdr gnus-article-current))
8959          header)
8960         (gnus-summary-update-article-line
8961          (cdr gnus-article-current) header)
8962         (when (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
8963           (gnus-summary-update-secondary-mark (cdr gnus-article-current))))))
8964    ((not arg)
8965     ;; Select the article the normal way.
8966     (gnus-summary-select-article nil 'force))
8967    (t
8968     ;; We have to require this here to make sure that the following
8969     ;; dynamic binding isn't shadowed by autoloading.
8970     (require 'gnus-async)
8971     (require 'gnus-art)
8972     ;; Bind the article treatment functions to nil.
8973     (let ((gnus-have-all-headers t)
8974           gnus-article-prepare-hook
8975           gnus-article-decode-hook
8976           gnus-display-mime-function
8977           gnus-break-pages)
8978       ;; Destroy any MIME parts.
8979       (when (gnus-buffer-live-p gnus-article-buffer)
8980         (save-excursion
8981           (set-buffer gnus-article-buffer)
8982           (mm-destroy-parts gnus-article-mime-handles)
8983           ;; Set it to nil for safety reason.
8984           (setq gnus-article-mime-handle-alist nil)
8985           (setq gnus-article-mime-handles nil)))
8986       (gnus-summary-select-article nil 'force))))
8987   (gnus-summary-goto-subject gnus-current-article)
8988   (gnus-summary-position-point))
8989
8990 (defun gnus-summary-show-raw-article ()
8991   "Show the raw article without any article massaging functions being run."
8992   (interactive)
8993   (gnus-summary-show-article t))
8994
8995 (defun gnus-summary-verbose-headers (&optional arg)
8996   "Toggle permanent full header display.
8997 If ARG is a positive number, turn header display on.
8998 If ARG is a negative number, turn header display off."
8999   (interactive "P")
9000   (setq gnus-show-all-headers
9001         (cond ((or (not (numberp arg))
9002                    (zerop arg))
9003                (not gnus-show-all-headers))
9004               ((natnump arg)
9005                t)))
9006   (gnus-summary-show-article))
9007
9008 (defun gnus-summary-toggle-header (&optional arg)
9009   "Show the headers if they are hidden, or hide them if they are shown.
9010 If ARG is a positive number, show the entire header.
9011 If ARG is a negative number, hide the unwanted header lines."
9012   (interactive "P")
9013   (let ((window (and (gnus-buffer-live-p gnus-article-buffer)
9014                      (get-buffer-window gnus-article-buffer t))))
9015     (with-current-buffer gnus-article-buffer
9016       (widen)
9017       (article-narrow-to-head)
9018       (let* ((buffer-read-only nil)
9019              (inhibit-point-motion-hooks t)
9020              (hidden (if (numberp arg)
9021                          (>= arg 0)
9022                        (or (not (looking-at "[^ \t\n]+:"))
9023                            (gnus-article-hidden-text-p 'headers))))
9024              s e)
9025         (delete-region (point-min) (point-max))
9026         (with-current-buffer gnus-original-article-buffer
9027           (goto-char (setq s (point-min)))
9028           (setq e (if (search-forward "\n\n" nil t)
9029                       (1- (point))
9030                     (point-max))))
9031         (insert-buffer-substring gnus-original-article-buffer s e)
9032         (run-hooks 'gnus-article-decode-hook)
9033         (if hidden
9034             (let ((gnus-treat-hide-headers nil)
9035                   (gnus-treat-hide-boring-headers nil))
9036               (gnus-delete-wash-type 'headers)
9037               (gnus-treat-article 'head))
9038           (gnus-treat-article 'head))
9039         (widen)
9040         (if window
9041             (set-window-start window (goto-char (point-min))))
9042         (if gnus-break-pages
9043             (gnus-narrow-to-page)
9044           (when (gnus-visual-p 'page-marker)
9045             (let ((buffer-read-only nil))
9046               (gnus-remove-text-with-property 'gnus-prev)
9047               (gnus-remove-text-with-property 'gnus-next))))
9048         (gnus-set-mode-line 'article)))))
9049
9050 (defun gnus-summary-show-all-headers ()
9051   "Make all header lines visible."
9052   (interactive)
9053   (gnus-summary-toggle-header 1))
9054
9055 (defun gnus-summary-caesar-message (&optional arg)
9056   "Caesar rotate the current article by 13.
9057 The numerical prefix specifies how many places to rotate each letter
9058 forward."
9059   (interactive "P")
9060   (gnus-summary-select-article)
9061   (let ((mail-header-separator ""))
9062     (gnus-eval-in-buffer-window gnus-article-buffer
9063       (save-restriction
9064         (widen)
9065         (let ((start (window-start))
9066               buffer-read-only)
9067           (message-caesar-buffer-body arg)
9068           (set-window-start (get-buffer-window (current-buffer)) start)))))
9069   ;; Create buttons and stuff...
9070   (gnus-treat-article nil))
9071
9072 (autoload 'unmorse-region "morse"
9073   "Convert morse coded text in region to ordinary ASCII text."
9074   t)
9075
9076 (defun gnus-summary-morse-message (&optional arg)
9077   "Morse decode the current article."
9078   (interactive "P")
9079   (gnus-summary-select-article)
9080   (let ((mail-header-separator ""))
9081     (gnus-eval-in-buffer-window gnus-article-buffer
9082       (save-excursion
9083         (save-restriction
9084           (widen)
9085           (let ((pos (window-start))
9086                 buffer-read-only)
9087             (goto-char (point-min))
9088             (when (message-goto-body)
9089               (gnus-narrow-to-body))
9090             (goto-char (point-min))
9091             (while (re-search-forward "·" (point-max) t)
9092               (replace-match "."))
9093             (unmorse-region (point-min) (point-max))
9094             (widen)
9095             (set-window-start (get-buffer-window (current-buffer)) pos)))))))
9096
9097 (defun gnus-summary-stop-page-breaking ()
9098   "Stop page breaking in the current article."
9099   (interactive)
9100   (gnus-summary-select-article)
9101   (gnus-eval-in-buffer-window gnus-article-buffer
9102     (widen)
9103     (when (gnus-visual-p 'page-marker)
9104       (let ((buffer-read-only nil))
9105         (gnus-remove-text-with-property 'gnus-prev)
9106         (gnus-remove-text-with-property 'gnus-next))
9107       (setq gnus-page-broken nil))))
9108
9109 (defun gnus-summary-move-article (&optional n to-newsgroup
9110                                             select-method action)
9111   "Move the current article to a different newsgroup.
9112 If N is a positive number, move the N next articles.
9113 If N is a negative number, move the N previous articles.
9114 If N is nil and any articles have been marked with the process mark,
9115 move those articles instead.
9116 If TO-NEWSGROUP is string, do not prompt for a newsgroup to move to.
9117 If SELECT-METHOD is non-nil, do not move to a specific newsgroup, but
9118 re-spool using this method.
9119
9120 When called interactively with TO-NEWSGROUP being nil, the value of
9121 the variable `gnus-move-split-methods' is used for finding a default
9122 for the target newsgroup.
9123
9124 For this function to work, both the current newsgroup and the
9125 newsgroup that you want to move to have to support the `request-move'
9126 and `request-accept' functions.
9127
9128 ACTION can be either `move' (the default), `crosspost' or `copy'."
9129   (interactive "P")
9130   (unless action
9131     (setq action 'move))
9132   ;; Check whether the source group supports the required functions.
9133   (cond ((and (eq action 'move)
9134               (not (gnus-check-backend-function
9135                     'request-move-article gnus-newsgroup-name)))
9136          (error "The current group does not support article moving"))
9137         ((and (eq action 'crosspost)
9138               (not (gnus-check-backend-function
9139                     'request-replace-article gnus-newsgroup-name)))
9140          (error "The current group does not support article editing")))
9141   (let ((articles (gnus-summary-work-articles n))
9142         (prefix (if (gnus-check-backend-function
9143                      'request-move-article gnus-newsgroup-name)
9144                     (gnus-group-real-prefix gnus-newsgroup-name)
9145                   ""))
9146         (names '((move "Move" "Moving")
9147                  (copy "Copy" "Copying")
9148                  (crosspost "Crosspost" "Crossposting")))
9149         (copy-buf (save-excursion
9150                     (nnheader-set-temp-buffer " *copy article*")))
9151         art-group to-method new-xref article to-groups)
9152     (unless (assq action names)
9153       (error "Unknown action %s" action))
9154     ;; Read the newsgroup name.
9155     (when (and (not to-newsgroup)
9156                (not select-method))
9157       (if (and gnus-move-split-methods
9158                (not
9159                 (and (memq gnus-current-article articles)
9160                      (gnus-buffer-live-p gnus-original-article-buffer))))
9161           ;; When `gnus-move-split-methods' is non-nil, we have to
9162           ;; select an article to give `gnus-read-move-group-name' an
9163           ;; opportunity to suggest an appropriate default.  However,
9164           ;; we needn't render or mark the article.
9165           (let ((gnus-display-mime-function nil)
9166                 (gnus-article-prepare-hook nil)
9167                 (gnus-mark-article-hook nil))
9168             (gnus-summary-select-article nil nil nil (car articles))))
9169       (setq to-newsgroup
9170             (gnus-read-move-group-name
9171              (cadr (assq action names))
9172              (symbol-value (intern (format "gnus-current-%s-group" action)))
9173              articles prefix))
9174       (set (intern (format "gnus-current-%s-group" action)) to-newsgroup))
9175     (setq to-method (or select-method
9176                         (gnus-server-to-method
9177                          (gnus-group-method to-newsgroup))))
9178     ;; Check the method we are to move this article to...
9179     (unless (gnus-check-backend-function
9180              'request-accept-article (car to-method))
9181       (error "%s does not support article copying" (car to-method)))
9182     (unless (gnus-check-server to-method)
9183       (error "Can't open server %s" (car to-method)))
9184     (gnus-message 6 "%s to %s: %s..."
9185                   (caddr (assq action names))
9186                   (or (car select-method) to-newsgroup) articles)
9187     (while articles
9188       (setq article (pop articles))
9189       (setq
9190        art-group
9191        (cond
9192         ;; Move the article.
9193         ((eq action 'move)
9194          ;; Remove this article from future suppression.
9195          (gnus-dup-unsuppress-article article)
9196          (gnus-request-move-article
9197           article                       ; Article to move
9198           gnus-newsgroup-name           ; From newsgroup
9199           (nth 1 (gnus-find-method-for-group
9200                   gnus-newsgroup-name)) ; Server
9201           (list 'gnus-request-accept-article
9202                 to-newsgroup (list 'quote select-method)
9203                 (not articles) t)       ; Accept form
9204           (not articles)))              ; Only save nov last time
9205         ;; Copy the article.
9206         ((eq action 'copy)
9207          (save-excursion
9208            (set-buffer copy-buf)
9209            (when (gnus-request-article-this-buffer article gnus-newsgroup-name)
9210              (gnus-request-accept-article
9211               to-newsgroup select-method (not articles) t))))
9212         ;; Crosspost the article.
9213         ((eq action 'crosspost)
9214          (let ((xref (message-tokenize-header
9215                       (mail-header-xref (gnus-summary-article-header article))
9216                       " ")))
9217            (setq new-xref (concat (gnus-group-real-name gnus-newsgroup-name)
9218                                   ":" (number-to-string article)))
9219            (unless xref
9220              (setq xref (list (system-name))))
9221            (setq new-xref
9222                  (concat
9223                   (mapconcat 'identity
9224                              (delete "Xref:" (delete new-xref xref))
9225                              " ")
9226                   " " new-xref))
9227            (save-excursion
9228              (set-buffer copy-buf)
9229              ;; First put the article in the destination group.
9230              (gnus-request-article-this-buffer article gnus-newsgroup-name)
9231              (when (consp (setq art-group
9232                                 (gnus-request-accept-article
9233                                  to-newsgroup select-method (not articles) t)))
9234                (setq new-xref (concat new-xref " " (car art-group)
9235                                       ":"
9236                                       (number-to-string (cdr art-group))))
9237                ;; Now we have the new Xrefs header, so we insert
9238                ;; it and replace the new article.
9239                (nnheader-replace-header "Xref" new-xref)
9240                (gnus-request-replace-article
9241                 (cdr art-group) to-newsgroup (current-buffer) t)
9242                art-group))))))
9243       (cond
9244        ((not art-group)
9245         (gnus-message 1 "Couldn't %s article %s: %s"
9246                       (cadr (assq action names)) article
9247                       (nnheader-get-report (car to-method))))
9248        ((eq art-group 'junk)
9249         (when (eq action 'move)
9250           (gnus-summary-mark-article article gnus-canceled-mark)
9251           (gnus-message 4 "Deleted article %s" article)
9252           ;; run the delete hook
9253           (run-hook-with-args 'gnus-summary-article-delete-hook
9254                               action
9255                               (gnus-data-header
9256                                (assoc article (gnus-data-list nil)))
9257                               gnus-newsgroup-name nil
9258                               select-method)))
9259        (t
9260         (let* ((pto-group (gnus-group-prefixed-name
9261                            (car art-group) to-method))
9262                (entry
9263                 (gnus-gethash pto-group gnus-newsrc-hashtb))
9264                (info (nth 2 entry))
9265                (to-group (gnus-info-group info))
9266                to-marks)
9267           ;; Update the group that has been moved to.
9268           (when (and info
9269                      (memq action '(move copy)))
9270             (unless (member to-group to-groups)
9271               (push to-group to-groups))
9272
9273             (unless (memq article gnus-newsgroup-unreads)
9274               (push 'read to-marks)
9275               (gnus-info-set-read
9276                info (gnus-add-to-range (gnus-info-read info)
9277                                        (list (cdr art-group)))))
9278
9279             ;; See whether the article is to be put in the cache.
9280             (let ((marks (if (gnus-group-auto-expirable-p to-group)
9281                              gnus-article-mark-lists
9282                            (delete '(expirable . expire)
9283                                    (copy-sequence gnus-article-mark-lists))))
9284                   (to-article (cdr art-group)))
9285
9286               ;; Enter the article into the cache in the new group,
9287               ;; if that is required.
9288               (when gnus-use-cache
9289                 (gnus-cache-possibly-enter-article
9290                  to-group to-article
9291                  (memq article gnus-newsgroup-marked)
9292                  (memq article gnus-newsgroup-dormant)
9293                  (memq article gnus-newsgroup-unreads)))
9294
9295               (when gnus-preserve-marks
9296                 ;; Copy any marks over to the new group.
9297                 (when (and (equal to-group gnus-newsgroup-name)
9298                            (not (memq article gnus-newsgroup-unreads)))
9299                   ;; Mark this article as read in this group.
9300                   (push (cons to-article gnus-read-mark) gnus-newsgroup-reads)
9301                   (setcdr (gnus-active to-group) to-article)
9302                   (setcdr gnus-newsgroup-active to-article))
9303
9304                 (while marks
9305                   (when (eq (gnus-article-mark-to-type (cdar marks)) 'list)
9306                     (when (memq article (symbol-value
9307                                          (intern (format "gnus-newsgroup-%s"
9308                                                          (caar marks)))))
9309                       (push (cdar marks) to-marks)
9310                       ;; If the other group is the same as this group,
9311                       ;; then we have to add the mark to the list.
9312                       (when (equal to-group gnus-newsgroup-name)
9313                         (set (intern (format "gnus-newsgroup-%s" (caar marks)))
9314                              (cons to-article
9315                                    (symbol-value
9316                                     (intern (format "gnus-newsgroup-%s"
9317                                                     (caar marks)))))))
9318                       ;; Copy the marks to other group.
9319                       (gnus-add-marked-articles
9320                        to-group (cdar marks) (list to-article) info)))
9321                   (setq marks (cdr marks)))
9322
9323                 (gnus-request-set-mark
9324                  to-group (list (list (list to-article) 'add to-marks))))
9325
9326               (gnus-dribble-enter
9327                (concat "(gnus-group-set-info '"
9328                        (gnus-prin1-to-string (gnus-get-info to-group))
9329                        ")"))))
9330
9331           ;; Update the Xref header in this article to point to
9332           ;; the new crossposted article we have just created.
9333           (when (eq action 'crosspost)
9334             (save-excursion
9335               (set-buffer copy-buf)
9336               (gnus-request-article-this-buffer article gnus-newsgroup-name)
9337               (nnheader-replace-header "Xref" new-xref)
9338               (gnus-request-replace-article
9339                article gnus-newsgroup-name (current-buffer) t)))
9340
9341           ;; run the move/copy/crosspost/respool hook
9342           (run-hook-with-args 'gnus-summary-article-move-hook
9343                               action
9344                               (gnus-data-header
9345                                (assoc article (gnus-data-list nil)))
9346                               gnus-newsgroup-name
9347                               to-newsgroup
9348                               select-method))
9349
9350         ;;;!!!Why is this necessary?
9351         (set-buffer gnus-summary-buffer)
9352
9353         (gnus-summary-goto-subject article)
9354         (when (eq action 'move)
9355           (gnus-summary-mark-article article gnus-canceled-mark))))
9356       (gnus-summary-remove-process-mark article))
9357     ;; Re-activate all groups that have been moved to.
9358     (save-excursion
9359       (set-buffer gnus-group-buffer)
9360       (let ((gnus-group-marked to-groups))
9361         (gnus-group-get-new-news-this-group nil t)))
9362
9363     (gnus-kill-buffer copy-buf)
9364     (gnus-summary-position-point)
9365     (gnus-set-mode-line 'summary)))
9366
9367 (defun gnus-summary-copy-article (&optional n to-newsgroup select-method)
9368   "Copy the current article to some other group.
9369 If TO-NEWSGROUP is string, do not prompt for a newsgroup to copy to.
9370 When called interactively, if TO-NEWSGROUP is nil, use the value of
9371 the variable `gnus-move-split-methods' for finding a default target
9372 newsgroup.
9373 If SELECT-METHOD is non-nil, do not move to a specific newsgroup, but
9374 re-spool using this method."
9375   (interactive "P")
9376   (gnus-summary-move-article n to-newsgroup select-method 'copy))
9377
9378 (defun gnus-summary-crosspost-article (&optional n)
9379   "Crosspost the current article to some other group."
9380   (interactive "P")
9381   (gnus-summary-move-article n nil nil 'crosspost))
9382
9383 (defcustom gnus-summary-respool-default-method nil
9384   "Default method type for respooling an article.
9385 If nil, use to the current newsgroup method."
9386   :type 'symbol
9387   :group 'gnus-summary-mail)
9388
9389 (defcustom gnus-summary-display-while-building nil
9390   "If non-nil, show and update the summary buffer as it's being built.
9391 If the value is t, update the buffer after every line is inserted.  If
9392 the value is an integer (N), update the display every N lines."
9393   :version "22.1"
9394   :group 'gnus-thread
9395   :type '(choice (const :tag "off" nil)
9396                  number
9397                  (const :tag "frequently" t)))
9398
9399 (defun gnus-summary-respool-article (&optional n method)
9400   "Respool the current article.
9401 The article will be squeezed through the mail spooling process again,
9402 which means that it will be put in some mail newsgroup or other
9403 depending on `nnmail-split-methods'.
9404 If N is a positive number, respool the N next articles.
9405 If N is a negative number, respool the N previous articles.
9406 If N is nil and any articles have been marked with the process mark,
9407 respool those articles instead.
9408
9409 Respooling can be done both from mail groups and \"real\" newsgroups.
9410 In the former case, the articles in question will be moved from the
9411 current group into whatever groups they are destined to.  In the
9412 latter case, they will be copied into the relevant groups."
9413   (interactive
9414    (list current-prefix-arg
9415          (let* ((methods (gnus-methods-using 'respool))
9416                 (methname
9417                  (symbol-name (or gnus-summary-respool-default-method
9418                                   (car (gnus-find-method-for-group
9419                                         gnus-newsgroup-name)))))
9420                 (method
9421                  (gnus-completing-read-with-default
9422                   methname "Backend to use when respooling"
9423                   methods nil t nil 'gnus-mail-method-history))
9424                 ms)
9425            (cond
9426             ((zerop (length (setq ms (gnus-servers-using-backend
9427                                       (intern method)))))
9428              (list (intern method) ""))
9429             ((= 1 (length ms))
9430              (car ms))
9431             (t
9432              (let ((ms-alist (mapcar (lambda (m) (cons (cadr m) m)) ms)))
9433                (cdr (assoc (completing-read "Server name: " ms-alist nil t)
9434                            ms-alist))))))))
9435   (unless method
9436     (error "No method given for respooling"))
9437   (if (assoc (symbol-name
9438               (car (gnus-find-method-for-group gnus-newsgroup-name)))
9439              (gnus-methods-using 'respool))
9440       (gnus-summary-move-article n nil method)
9441     (gnus-summary-copy-article n nil method)))
9442
9443 (defun gnus-summary-import-article (file &optional edit)
9444   "Import an arbitrary file into a mail newsgroup."
9445   (interactive "fImport file: \nP")
9446   (let ((group gnus-newsgroup-name)
9447         (now (current-time))
9448         atts lines group-art)
9449     (unless (gnus-check-backend-function 'request-accept-article group)
9450       (error "%s does not support article importing" group))
9451     (or (file-readable-p file)
9452         (not (file-regular-p file))
9453         (error "Can't read %s" file))
9454     (save-excursion
9455       (set-buffer (gnus-get-buffer-create " *import file*"))
9456       (erase-buffer)
9457       (nnheader-insert-file-contents file)
9458       (goto-char (point-min))
9459       (if (nnheader-article-p)
9460           (save-restriction
9461             (goto-char (point-min))
9462             (search-forward "\n\n" nil t)
9463             (narrow-to-region (point-min) (1- (point)))
9464             (goto-char (point-min))
9465             (unless (re-search-forward "^date:" nil t)
9466               (goto-char (point-max))
9467               (insert "Date: " (message-make-date (nth 5 atts)) "\n")))
9468        ;; This doesn't look like an article, so we fudge some headers.
9469         (setq atts (file-attributes file)
9470               lines (count-lines (point-min) (point-max)))
9471         (insert "From: " (read-string "From: ") "\n"
9472                 "Subject: " (read-string "Subject: ") "\n"
9473                 "Date: " (message-make-date (nth 5 atts)) "\n"
9474                 "Message-ID: " (message-make-message-id) "\n"
9475                 "Lines: " (int-to-string lines) "\n"
9476                 "Chars: " (int-to-string (nth 7 atts)) "\n\n"))
9477       (setq group-art (gnus-request-accept-article group nil t))
9478       (kill-buffer (current-buffer)))
9479     (setq gnus-newsgroup-active (gnus-activate-group group))
9480     (forward-line 1)
9481     (gnus-summary-goto-article (cdr group-art) nil t)
9482     (when edit
9483       (gnus-summary-edit-article))))
9484
9485 (defun gnus-summary-create-article ()
9486   "Create an article in a mail newsgroup."
9487   (interactive)
9488   (let ((group gnus-newsgroup-name)
9489         (now (current-time))
9490         group-art)
9491     (unless (gnus-check-backend-function 'request-accept-article group)
9492       (error "%s does not support article importing" group))
9493     (save-excursion
9494       (set-buffer (gnus-get-buffer-create " *import file*"))
9495       (erase-buffer)
9496       (goto-char (point-min))
9497       ;; This doesn't look like an article, so we fudge some headers.
9498       (insert "From: " (read-string "From: ") "\n"
9499               "Subject: " (read-string "Subject: ") "\n"
9500               "Date: " (message-make-date now) "\n"
9501               "Message-ID: " (message-make-message-id) "\n")
9502       (setq group-art (gnus-request-accept-article group nil t))
9503       (kill-buffer (current-buffer)))
9504     (setq gnus-newsgroup-active (gnus-activate-group group))
9505     (forward-line 1)
9506     (gnus-summary-goto-article (cdr group-art) nil t)
9507     (gnus-summary-edit-article)))
9508
9509 (defun gnus-summary-article-posted-p ()
9510   "Say whether the current (mail) article is available from news as well.
9511 This will be the case if the article has both been mailed and posted."
9512   (interactive)
9513   (let ((id (mail-header-references (gnus-summary-article-header)))
9514         (gnus-override-method (car (gnus-refer-article-methods))))
9515     (if (gnus-request-head id "")
9516         (gnus-message 2 "The current message was found on %s"
9517                       gnus-override-method)
9518       (gnus-message 2 "The current message couldn't be found on %s"
9519                     gnus-override-method)
9520       nil)))
9521
9522 (defun gnus-summary-expire-articles (&optional now)
9523   "Expire all articles that are marked as expirable in the current group."
9524   (interactive)
9525   (when (and (not gnus-group-is-exiting-without-update-p)
9526              (gnus-check-backend-function
9527               'request-expire-articles gnus-newsgroup-name))
9528     ;; This backend supports expiry.
9529     (let* ((total (gnus-group-total-expirable-p gnus-newsgroup-name))
9530            (expirable (if total
9531                           (progn
9532                             ;; We need to update the info for
9533                             ;; this group for `gnus-list-of-read-articles'
9534                             ;; to give us the right answer.
9535                             (gnus-run-hooks 'gnus-exit-group-hook)
9536                             (gnus-summary-update-info)
9537                             (gnus-list-of-read-articles gnus-newsgroup-name))
9538                         (setq gnus-newsgroup-expirable
9539                               (sort gnus-newsgroup-expirable '<))))
9540            (expiry-wait (if now 'immediate
9541                           (gnus-group-find-parameter
9542                            gnus-newsgroup-name 'expiry-wait)))
9543            (nnmail-expiry-target
9544             (or (gnus-group-find-parameter gnus-newsgroup-name 'expiry-target)
9545                 nnmail-expiry-target))
9546            es)
9547       (when expirable
9548         ;; There are expirable articles in this group, so we run them
9549         ;; through the expiry process.
9550         (gnus-message 6 "Expiring articles...")
9551         (unless (gnus-check-group gnus-newsgroup-name)
9552           (error "Can't open server for %s" gnus-newsgroup-name))
9553         ;; The list of articles that weren't expired is returned.
9554         (save-excursion
9555           (if expiry-wait
9556               (let ((nnmail-expiry-wait-function nil)
9557                     (nnmail-expiry-wait expiry-wait))
9558                 (setq es (gnus-request-expire-articles
9559                           expirable gnus-newsgroup-name)))
9560             (setq es (gnus-request-expire-articles
9561                       expirable gnus-newsgroup-name)))
9562           (unless total
9563             (setq gnus-newsgroup-expirable es))
9564           ;; We go through the old list of expirable, and mark all
9565           ;; really expired articles as nonexistent.
9566           (unless (eq es expirable) ;If nothing was expired, we don't mark.
9567             (let ((gnus-use-cache nil))
9568               (dolist (article expirable)
9569                 (when (and (not (memq article es))
9570                            (gnus-data-find article))
9571                   (gnus-summary-mark-article article gnus-canceled-mark)
9572                   (run-hook-with-args 'gnus-summary-article-expire-hook
9573                                       'delete
9574                                       (gnus-data-header
9575                                        (assoc article (gnus-data-list nil)))
9576                                       gnus-newsgroup-name
9577                                       nil
9578                                       nil))))))
9579         (gnus-message 6 "Expiring articles...done")))))
9580
9581 (defun gnus-summary-expire-articles-now ()
9582   "Expunge all expirable articles in the current group.
9583 This means that *all* articles that are marked as expirable will be
9584 deleted forever, right now."
9585   (interactive)
9586   (or gnus-expert-user
9587       (gnus-yes-or-no-p
9588        "Are you really, really sure you want to delete all expirable messages? ")
9589       (error "Phew!"))
9590   (gnus-summary-expire-articles t))
9591
9592 ;; Suggested by Jack Vinson <vinson@unagi.cis.upenn.edu>.
9593 (defun gnus-summary-delete-article (&optional n)
9594   "Delete the N next (mail) articles.
9595 This command actually deletes articles.  This is not a marking
9596 command.  The article will disappear forever from your life, never to
9597 return.
9598
9599 If N is negative, delete backwards.
9600 If N is nil and articles have been marked with the process mark,
9601 delete these instead.
9602
9603 If `gnus-novice-user' is non-nil you will be asked for
9604 confirmation before the articles are deleted."
9605   (interactive "P")
9606   (unless (gnus-check-backend-function 'request-expire-articles
9607                                        gnus-newsgroup-name)
9608     (error "The current newsgroup does not support article deletion"))
9609   (unless (gnus-check-server (gnus-find-method-for-group gnus-newsgroup-name))
9610     (error "Couldn't open server"))
9611   ;; Compute the list of articles to delete.
9612   (let ((articles (sort (copy-sequence (gnus-summary-work-articles n)) '<))
9613         (nnmail-expiry-target 'delete)
9614         not-deleted)
9615     (if (and gnus-novice-user
9616              (not (gnus-yes-or-no-p
9617                    (format "Do you really want to delete %s forever? "
9618                            (if (> (length articles) 1)
9619                                (format "these %s articles" (length articles))
9620                              "this article")))))
9621         ()
9622       ;; Delete the articles.
9623       (setq not-deleted (gnus-request-expire-articles
9624                          articles gnus-newsgroup-name 'force))
9625       (while articles
9626         (gnus-summary-remove-process-mark (car articles))
9627         ;; The backend might not have been able to delete the article
9628         ;; after all.
9629         (unless (memq (car articles) not-deleted)
9630           (gnus-summary-mark-article (car articles) gnus-canceled-mark))
9631         (let* ((article (car articles))
9632                (id (mail-header-id (gnus-data-header
9633                                     (assoc article (gnus-data-list nil))))))
9634           (run-hook-with-args 'gnus-summary-article-delete-hook
9635                               'delete id gnus-newsgroup-name nil
9636                               nil))
9637         (setq articles (cdr articles)))
9638       (when not-deleted
9639         (gnus-message 4 "Couldn't delete articles %s" not-deleted)))
9640     (gnus-summary-position-point)
9641     (gnus-set-mode-line 'summary)
9642     not-deleted))
9643
9644 (defun gnus-summary-edit-article (&optional arg)
9645   "Edit the current article.
9646 This will have permanent effect only in mail groups.
9647 If ARG is nil, edit the decoded articles.
9648 If ARG is 1, edit the raw articles.
9649 If ARG is 2, edit the raw articles even in read-only groups.
9650 If ARG is 3, edit the articles with the current handles.
9651 Otherwise, allow editing of articles even in read-only
9652 groups."
9653   (interactive "P")
9654   (let (force raw current-handles)
9655     (cond
9656      ((null arg))
9657      ((eq arg 1)
9658       (setq raw t))
9659      ((eq arg 2)
9660       (setq raw t
9661             force t))
9662      ((eq arg 3)
9663       (setq current-handles
9664             (and (gnus-buffer-live-p gnus-article-buffer)
9665                  (with-current-buffer gnus-article-buffer
9666                    (prog1
9667                        gnus-article-mime-handles
9668                      (setq gnus-article-mime-handles nil))))))
9669      (t
9670       (setq force t)))
9671     (when (and raw (not force)
9672                (member gnus-newsgroup-name '("nndraft:delayed"
9673                                              "nndraft:drafts"
9674                                              "nndraft:queue")))
9675       (error "Can't edit the raw article in group %s"
9676              gnus-newsgroup-name))
9677     (save-excursion
9678       (set-buffer gnus-summary-buffer)
9679       (let ((mail-parse-charset gnus-newsgroup-charset)
9680             (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets))
9681         (gnus-set-global-variables)
9682         (when (and (not force)
9683                    (gnus-group-read-only-p))
9684           (error "The current newsgroup does not support article editing"))
9685         (gnus-summary-show-article t)
9686         (when (and (not raw) (gnus-buffer-live-p gnus-article-buffer))
9687           (with-current-buffer gnus-article-buffer
9688             (mm-enable-multibyte)))
9689         (if (member gnus-newsgroup-name '("nndraft:delayed" "nndraft:drafts"))
9690             (setq raw t))
9691         (gnus-article-edit-article
9692          (if raw 'ignore
9693            `(lambda ()
9694               (let ((mbl mml-buffer-list))
9695                 (setq mml-buffer-list nil)
9696                 (let ((rfc2047-quote-decoded-words-containing-tspecials t))
9697                   (mime-to-mml ,'current-handles))
9698                 (let ((mbl1 mml-buffer-list))
9699                   (setq mml-buffer-list mbl)
9700                   (set (make-local-variable 'mml-buffer-list) mbl1))
9701                 (gnus-make-local-hook 'kill-buffer-hook)
9702                 (add-hook 'kill-buffer-hook 'mml-destroy-buffers t t))))
9703          `(lambda (no-highlight)
9704             (let ((mail-parse-charset ',gnus-newsgroup-charset)
9705                   (message-options message-options)
9706                   (message-options-set-recipient)
9707                   (mail-parse-ignored-charsets
9708                    ',gnus-newsgroup-ignored-charsets))
9709               ,(if (not raw) '(progn
9710                                 (mml-to-mime)
9711                                 (mml-destroy-buffers)
9712                                 (remove-hook 'kill-buffer-hook
9713                                              'mml-destroy-buffers t)
9714                                 (kill-local-variable 'mml-buffer-list)))
9715               (gnus-summary-edit-article-done
9716                ,(or (mail-header-references gnus-current-headers) "")
9717                ,(gnus-group-read-only-p)
9718                ,gnus-summary-buffer no-highlight))))))))
9719
9720 (defalias 'gnus-summary-edit-article-postpone 'gnus-article-edit-exit)
9721
9722 (defun gnus-summary-edit-article-done (&optional references read-only buffer
9723                                                  no-highlight)
9724   "Make edits to the current article permanent."
9725   (interactive)
9726   (save-excursion
9727    ;; The buffer restriction contains the entire article if it exists.
9728     (when (article-goto-body)
9729       (let ((lines (count-lines (point) (point-max)))
9730             (length (- (point-max) (point)))
9731             (case-fold-search t)
9732             (body (copy-marker (point))))
9733         (goto-char (point-min))
9734         (when (re-search-forward "^content-length:[ \t]\\([0-9]+\\)" body t)
9735           (delete-region (match-beginning 1) (match-end 1))
9736           (insert (number-to-string length)))
9737         (goto-char (point-min))
9738         (when (re-search-forward
9739                "^x-content-length:[ \t]\\([0-9]+\\)" body t)
9740           (delete-region (match-beginning 1) (match-end 1))
9741           (insert (number-to-string length)))
9742         (goto-char (point-min))
9743         (when (re-search-forward "^lines:[ \t]\\([0-9]+\\)" body t)
9744           (delete-region (match-beginning 1) (match-end 1))
9745           (insert (number-to-string lines))))))
9746   ;; Replace the article.
9747   (let ((buf (current-buffer)))
9748     (with-temp-buffer
9749       (insert-buffer-substring buf)
9750
9751       (if (and (not read-only)
9752                (not (gnus-request-replace-article
9753                      (cdr gnus-article-current) (car gnus-article-current)
9754                      (current-buffer) t)))
9755           (error "Couldn't replace article")
9756         ;; Update the summary buffer.
9757         (if (and references
9758                  (equal (message-tokenize-header references " ")
9759                         (message-tokenize-header
9760                          (or (message-fetch-field "references") "") " ")))
9761             ;; We only have to update this line.
9762             (save-excursion
9763               (save-restriction
9764                 (message-narrow-to-head)
9765                 (let ((head (buffer-substring-no-properties
9766                              (point-min) (point-max)))
9767                       header)
9768                   (with-temp-buffer
9769                     (insert (format "211 %d Article retrieved.\n"
9770                                     (cdr gnus-article-current)))
9771                     (insert head)
9772                     (insert ".\n")
9773                     (let ((nntp-server-buffer (current-buffer)))
9774                       (setq header (car (gnus-get-newsgroup-headers
9775                                          nil t))))
9776                     (save-excursion
9777                       (set-buffer gnus-summary-buffer)
9778                       (gnus-data-set-header
9779                        (gnus-data-find (cdr gnus-article-current))
9780                        header)
9781                       (gnus-summary-update-article-line
9782                        (cdr gnus-article-current) header)
9783                       (if (gnus-summary-goto-subject
9784                            (cdr gnus-article-current) nil t)
9785                           (gnus-summary-update-secondary-mark
9786                            (cdr gnus-article-current))))))))
9787           ;; Update threads.
9788           (set-buffer (or buffer gnus-summary-buffer))
9789           (gnus-summary-update-article (cdr gnus-article-current))
9790           (if (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
9791               (gnus-summary-update-secondary-mark
9792                (cdr gnus-article-current))))
9793         ;; Prettify the article buffer again.
9794         (unless no-highlight
9795           (save-excursion
9796             (set-buffer gnus-article-buffer)
9797             ;;;!!! Fix this -- article should be rehighlighted.
9798             ;;;(gnus-run-hooks 'gnus-article-display-hook)
9799             (set-buffer gnus-original-article-buffer)
9800             (gnus-request-article
9801              (cdr gnus-article-current)
9802              (car gnus-article-current) (current-buffer))))
9803         ;; Prettify the summary buffer line.
9804         (when (gnus-visual-p 'summary-highlight 'highlight)
9805           (gnus-run-hooks 'gnus-visual-mark-article-hook))))))
9806
9807 (defun gnus-summary-edit-wash (key)
9808   "Perform editing command KEY in the article buffer."
9809   (interactive
9810    (list
9811     (progn
9812       (message "%s" (concat (this-command-keys) "- "))
9813       (read-char))))
9814   (message "")
9815   (gnus-summary-edit-article)
9816   (execute-kbd-macro (concat (this-command-keys) key))
9817   (gnus-article-edit-done))
9818
9819 ;;; Respooling
9820
9821 (defun gnus-summary-respool-query (&optional silent trace)
9822   "Query where the respool algorithm would put this article."
9823   (interactive)
9824   (let (gnus-mark-article-hook)
9825     (gnus-summary-select-article)
9826     (save-excursion
9827       (set-buffer gnus-original-article-buffer)
9828       (let ((groups (nnmail-article-group 'identity trace)))
9829         (unless silent
9830           (if groups
9831               (message "This message would go to %s"
9832                        (mapconcat 'car groups ", "))
9833             (message "This message would go to no groups"))
9834           groups)))))
9835
9836 (defun gnus-summary-respool-trace ()
9837   "Trace where the respool algorithm would put this article.
9838 Display a buffer showing all fancy splitting patterns which matched."
9839   (interactive)
9840   (gnus-summary-respool-query nil t))
9841
9842 ;; Summary marking commands.
9843
9844 (defun gnus-summary-kill-same-subject-and-select (&optional unmark)
9845   "Mark articles which has the same subject as read, and then select the next.
9846 If UNMARK is positive, remove any kind of mark.
9847 If UNMARK is negative, tick articles."
9848   (interactive "P")
9849   (when unmark
9850     (setq unmark (prefix-numeric-value unmark)))
9851   (let ((count
9852          (gnus-summary-mark-same-subject
9853           (gnus-summary-article-subject) unmark)))
9854     ;; Select next unread article.  If auto-select-same mode, should
9855     ;; select the first unread article.
9856     (gnus-summary-next-article t (and gnus-auto-select-same
9857                                       (gnus-summary-article-subject)))
9858     (gnus-message 7 "%d article%s marked as %s"
9859                   count (if (= count 1) " is" "s are")
9860                   (if unmark "unread" "read"))))
9861
9862 (defun gnus-summary-kill-same-subject (&optional unmark)
9863   "Mark articles which has the same subject as read.
9864 If UNMARK is positive, remove any kind of mark.
9865 If UNMARK is negative, tick articles."
9866   (interactive "P")
9867   (when unmark
9868     (setq unmark (prefix-numeric-value unmark)))
9869   (let ((count
9870          (gnus-summary-mark-same-subject
9871           (gnus-summary-article-subject) unmark)))
9872     ;; If marked as read, go to next unread subject.
9873     (when (null unmark)
9874       ;; Go to next unread subject.
9875       (gnus-summary-next-subject 1 t))
9876     (gnus-message 7 "%d articles are marked as %s"
9877                   count (if unmark "unread" "read"))))
9878
9879 (defun gnus-summary-mark-same-subject (subject &optional unmark)
9880   "Mark articles with same SUBJECT as read, and return marked number.
9881 If optional argument UNMARK is positive, remove any kinds of marks.
9882 If optional argument UNMARK is negative, mark articles as unread instead."
9883   (let ((count 1))
9884     (save-excursion
9885       (cond
9886        ((null unmark)                   ; Mark as read.
9887         (while (and
9888                 (progn
9889                   (gnus-summary-mark-article-as-read gnus-killed-mark)
9890                   (gnus-summary-show-thread) t)
9891                 (gnus-summary-find-subject subject))
9892           (setq count (1+ count))))
9893        ((> unmark 0)                    ; Tick.
9894         (while (and
9895                 (progn
9896                   (gnus-summary-mark-article-as-unread gnus-ticked-mark)
9897                   (gnus-summary-show-thread) t)
9898                 (gnus-summary-find-subject subject))
9899           (setq count (1+ count))))
9900        (t                               ; Mark as unread.
9901         (while (and
9902                 (progn
9903                   (gnus-summary-mark-article-as-unread gnus-unread-mark)
9904                   (gnus-summary-show-thread) t)
9905                 (gnus-summary-find-subject subject))
9906           (setq count (1+ count)))))
9907       (gnus-set-mode-line 'summary)
9908       ;; Return the number of marked articles.
9909       count)))
9910
9911 (defun gnus-summary-mark-as-processable (n &optional unmark)
9912   "Set the process mark on the next N articles.
9913 If N is negative, mark backward instead.  If UNMARK is non-nil, remove
9914 the process mark instead.  The difference between N and the actual
9915 number of articles marked is returned."
9916   (interactive "P")
9917   (if (and (null n) (gnus-region-active-p))
9918       (gnus-uu-mark-region (region-beginning) (region-end) unmark)
9919     (setq n (prefix-numeric-value n))
9920     (let ((backward (< n 0))
9921           (n (abs n)))
9922       (while (and
9923               (> n 0)
9924               (if unmark
9925                   (gnus-summary-remove-process-mark
9926                    (gnus-summary-article-number))
9927                 (gnus-summary-set-process-mark (gnus-summary-article-number)))
9928               (zerop (gnus-summary-next-subject (if backward -1 1) nil t)))
9929         (setq n (1- n)))
9930       (when (/= 0 n)
9931         (gnus-message 7 "No more articles"))
9932       (gnus-summary-recenter)
9933       (gnus-summary-position-point)
9934       n)))
9935
9936 (defun gnus-summary-unmark-as-processable (n)
9937   "Remove the process mark from the next N articles.
9938 If N is negative, unmark backward instead.  The difference between N and
9939 the actual number of articles unmarked is returned."
9940   (interactive "P")
9941   (gnus-summary-mark-as-processable n t))
9942
9943 (defun gnus-summary-unmark-all-processable ()
9944   "Remove the process mark from all articles."
9945   (interactive)
9946   (save-excursion
9947     (while gnus-newsgroup-processable
9948       (gnus-summary-remove-process-mark (car gnus-newsgroup-processable))))
9949   (gnus-summary-position-point))
9950
9951 (defun gnus-summary-add-mark (article type)
9952   "Mark ARTICLE with a mark of TYPE."
9953   (let ((vtype (car (assq type gnus-article-mark-lists)))
9954         var)
9955     (if (not vtype)
9956         (error "No such mark type: %s" type)
9957       (setq var (intern (format "gnus-newsgroup-%s" type)))
9958       (set var (cons article (symbol-value var)))
9959       (if (memq type '(processable cached replied forwarded recent saved))
9960           (gnus-summary-update-secondary-mark article)
9961         ;;; !!! This is bogus.  We should find out what primary
9962         ;;; !!! mark we want to set.
9963         (gnus-summary-update-mark gnus-del-mark 'unread)))))
9964
9965 (defun gnus-summary-mark-as-expirable (n)
9966   "Mark N articles forward as expirable.
9967 If N is negative, mark backward instead.  The difference between N and
9968 the actual number of articles marked is returned."
9969   (interactive "p")
9970   (gnus-summary-mark-forward n gnus-expirable-mark))
9971
9972 (defun gnus-summary-mark-as-spam (n)
9973   "Mark N articles forward as spam.
9974 If N is negative, mark backward instead.  The difference between N and
9975 the actual number of articles marked is returned."
9976   (interactive "p")
9977   (gnus-summary-mark-forward n gnus-spam-mark))
9978
9979 (defun gnus-summary-mark-article-as-replied (article)
9980   "Mark ARTICLE as replied to and update the summary line.
9981 ARTICLE can also be a list of articles."
9982   (interactive (list (gnus-summary-article-number)))
9983   (let ((articles (if (listp article) article (list article))))
9984     (dolist (article articles)
9985       (unless (numberp article)
9986         (error "%s is not a number" article))
9987       (push article gnus-newsgroup-replied)
9988       (let ((buffer-read-only nil))
9989         (when (gnus-summary-goto-subject article nil t)
9990           (gnus-summary-update-secondary-mark article))))))
9991
9992 (defun gnus-summary-mark-article-as-forwarded (article)
9993   "Mark ARTICLE as forwarded and update the summary line.
9994 ARTICLE can also be a list of articles."
9995   (let ((articles (if (listp article) article (list article))))
9996     (dolist (article articles)
9997       (push article gnus-newsgroup-forwarded)
9998       (let ((buffer-read-only nil))
9999         (when (gnus-summary-goto-subject article nil t)
10000           (gnus-summary-update-secondary-mark article))))))
10001
10002 (defun gnus-summary-set-bookmark (article)
10003   "Set a bookmark in current article."
10004   (interactive (list (gnus-summary-article-number)))
10005   (when (or (not (get-buffer gnus-article-buffer))
10006             (not gnus-current-article)
10007             (not gnus-article-current)
10008             (not (equal gnus-newsgroup-name (car gnus-article-current))))
10009     (error "No current article selected"))
10010   ;; Remove old bookmark, if one exists.
10011   (gnus-pull article gnus-newsgroup-bookmarks)
10012   ;; Set the new bookmark, which is on the form
10013   ;; (article-number . line-number-in-body).
10014   (push
10015    (cons article
10016          (save-excursion
10017            (set-buffer gnus-article-buffer)
10018            (count-lines
10019             (min (point)
10020                  (save-excursion
10021                    (article-goto-body)
10022                    (point)))
10023             (point))))
10024    gnus-newsgroup-bookmarks)
10025   (gnus-message 6 "A bookmark has been added to the current article."))
10026
10027 (defun gnus-summary-remove-bookmark (article)
10028   "Remove the bookmark from the current article."
10029   (interactive (list (gnus-summary-article-number)))
10030   ;; Remove old bookmark, if one exists.
10031   (if (not (assq article gnus-newsgroup-bookmarks))
10032       (gnus-message 6 "No bookmark in current article.")
10033     (gnus-pull article gnus-newsgroup-bookmarks)
10034     (gnus-message 6 "Removed bookmark.")))
10035
10036 ;; Suggested by Daniel Quinlan <quinlan@best.com>.
10037 (defun gnus-summary-mark-as-dormant (n)
10038   "Mark N articles forward as dormant.
10039 If N is negative, mark backward instead.  The difference between N and
10040 the actual number of articles marked is returned."
10041   (interactive "p")
10042   (gnus-summary-mark-forward n gnus-dormant-mark))
10043
10044 (defun gnus-summary-set-process-mark (article)
10045   "Set the process mark on ARTICLE and update the summary line."
10046   (setq gnus-newsgroup-processable
10047         (cons article
10048               (delq article gnus-newsgroup-processable)))
10049   (when (gnus-summary-goto-subject article)
10050     (gnus-summary-show-thread)
10051     (gnus-summary-goto-subject article)
10052     (gnus-summary-update-secondary-mark article)))
10053
10054 (defun gnus-summary-remove-process-mark (article)
10055   "Remove the process mark from ARTICLE and update the summary line."
10056   (setq gnus-newsgroup-processable (delq article gnus-newsgroup-processable))
10057   (when (gnus-summary-goto-subject article)
10058     (gnus-summary-show-thread)
10059     (gnus-summary-goto-subject article)
10060     (gnus-summary-update-secondary-mark article)))
10061
10062 (defun gnus-summary-set-saved-mark (article)
10063   "Set the process mark on ARTICLE and update the summary line."
10064   (push article gnus-newsgroup-saved)
10065   (when (gnus-summary-goto-subject article)
10066     (gnus-summary-update-secondary-mark article)))
10067
10068 (defun gnus-summary-mark-forward (n &optional mark no-expire)
10069   "Mark N articles as read forwards.
10070 If N is negative, mark backwards instead.  Mark with MARK, ?r by default.
10071 The difference between N and the actual number of articles marked is
10072 returned.
10073 If NO-EXPIRE, auto-expiry will be inhibited."
10074   (interactive "p")
10075   (gnus-summary-show-thread)
10076   (let ((backward (< n 0))
10077         (gnus-summary-goto-unread
10078          (and gnus-summary-goto-unread
10079               (not (eq gnus-summary-goto-unread 'never))
10080               (not (memq mark (list gnus-unread-mark gnus-spam-mark
10081                                     gnus-ticked-mark gnus-dormant-mark)))))
10082         (n (abs n))
10083         (mark (or mark gnus-del-mark)))
10084     (while (and (> n 0)
10085                 (gnus-summary-mark-article nil mark no-expire)
10086                 (zerop (gnus-summary-next-subject
10087                         (if backward -1 1)
10088                         (and gnus-summary-goto-unread
10089                              (not (eq gnus-summary-goto-unread 'never)))
10090                         t)))
10091       (setq n (1- n)))
10092     (when (/= 0 n)
10093       (gnus-message 7 "No more %sarticles" (if mark "" "unread ")))
10094     (gnus-summary-recenter)
10095     (gnus-summary-position-point)
10096     (gnus-set-mode-line 'summary)
10097     n))
10098
10099 (defun gnus-summary-mark-article-as-read (mark)
10100   "Mark the current article quickly as read with MARK."
10101   (let ((article (gnus-summary-article-number)))
10102     (setq gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
10103     (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
10104     (setq gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked))
10105     (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
10106     (push (cons article mark) gnus-newsgroup-reads)
10107     ;; Possibly remove from cache, if that is used.
10108     (when gnus-use-cache
10109       (gnus-cache-enter-remove-article article))
10110     ;; Allow the backend to change the mark.
10111     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10112     ;; Check for auto-expiry.
10113     (when (and gnus-newsgroup-auto-expire
10114                (memq mark gnus-auto-expirable-marks))
10115       (setq mark gnus-expirable-mark)
10116       ;; Let the backend know about the mark change.
10117       (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10118       (push article gnus-newsgroup-expirable))
10119     ;; Set the mark in the buffer.
10120     (gnus-summary-update-mark mark 'unread)
10121     t))
10122
10123 (defun gnus-summary-mark-article-as-unread (mark)
10124   "Mark the current article quickly as unread with MARK."
10125   (let* ((article (gnus-summary-article-number))
10126          (old-mark (gnus-summary-article-mark article)))
10127     ;; Allow the backend to change the mark.
10128     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10129     (if (eq mark old-mark)
10130         t
10131       (if (<= article 0)
10132           (progn
10133             (gnus-error 1 "Can't mark negative article numbers")
10134             nil)
10135         (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
10136         (setq gnus-newsgroup-spam-marked
10137               (delq article gnus-newsgroup-spam-marked))
10138         (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
10139         (setq gnus-newsgroup-expirable (delq article gnus-newsgroup-expirable))
10140         (setq gnus-newsgroup-reads (delq article gnus-newsgroup-reads))
10141         (cond ((= mark gnus-ticked-mark)
10142                (setq gnus-newsgroup-marked
10143                      (gnus-add-to-sorted-list gnus-newsgroup-marked
10144                                               article)))
10145               ((= mark gnus-spam-mark)
10146                (setq gnus-newsgroup-spam-marked
10147                      (gnus-add-to-sorted-list gnus-newsgroup-spam-marked
10148                                               article)))
10149               ((= mark gnus-dormant-mark)
10150                (setq gnus-newsgroup-dormant
10151                      (gnus-add-to-sorted-list gnus-newsgroup-dormant
10152                                               article)))
10153               (t
10154                (setq gnus-newsgroup-unreads
10155                      (gnus-add-to-sorted-list gnus-newsgroup-unreads
10156                                               article))))
10157         (gnus-pull article gnus-newsgroup-reads)
10158
10159         ;; See whether the article is to be put in the cache.
10160         (and gnus-use-cache
10161              (vectorp (gnus-summary-article-header article))
10162              (save-excursion
10163                (gnus-cache-possibly-enter-article
10164                 gnus-newsgroup-name article
10165                 (= mark gnus-ticked-mark)
10166                 (= mark gnus-dormant-mark) (= mark gnus-unread-mark))))
10167
10168         ;; Fix the mark.
10169         (gnus-summary-update-mark mark 'unread)
10170         t))))
10171
10172 (defun gnus-summary-mark-article (&optional article mark no-expire)
10173   "Mark ARTICLE with MARK.  MARK can be any character.
10174 Four MARK strings are reserved: `? ' (unread), `?!' (ticked),
10175 `??' (dormant) and `?E' (expirable).
10176 If MARK is nil, then the default character `?r' is used.
10177 If ARTICLE is nil, then the article on the current line will be
10178 marked.
10179 If NO-EXPIRE, auto-expiry will be inhibited."
10180   ;; The mark might be a string.
10181   (when (stringp mark)
10182     (setq mark (aref mark 0)))
10183   ;; If no mark is given, then we check auto-expiring.
10184   (when (null mark)
10185     (setq mark gnus-del-mark))
10186   (when (and (not no-expire)
10187              gnus-newsgroup-auto-expire
10188              (memq mark gnus-auto-expirable-marks))
10189     (setq mark gnus-expirable-mark))
10190   (let ((article (or article (gnus-summary-article-number)))
10191         (old-mark (gnus-summary-article-mark article)))
10192     ;; Allow the backend to change the mark.
10193     (setq mark (gnus-request-update-mark gnus-newsgroup-name article mark))
10194     (if (eq mark old-mark)
10195         t
10196       (unless article
10197         (error "No article on current line"))
10198       (if (not (if (or (= mark gnus-unread-mark)
10199                        (= mark gnus-ticked-mark)
10200                        (= mark gnus-spam-mark)
10201                        (= mark gnus-dormant-mark))
10202                    (gnus-mark-article-as-unread article mark)
10203                  (gnus-mark-article-as-read article mark)))
10204           t
10205         ;; See whether the article is to be put in the cache.
10206         (and gnus-use-cache
10207              (not (= mark gnus-canceled-mark))
10208              (vectorp (gnus-summary-article-header article))
10209              (save-excursion
10210                (gnus-cache-possibly-enter-article
10211                 gnus-newsgroup-name article
10212                 (= mark gnus-ticked-mark)
10213                 (= mark gnus-dormant-mark) (= mark gnus-unread-mark))))
10214
10215         (when (gnus-summary-goto-subject article nil t)
10216           (let ((buffer-read-only nil))
10217             (gnus-summary-show-thread)
10218             ;; Fix the mark.
10219             (gnus-summary-update-mark mark 'unread)
10220             t))))))
10221
10222 (defun gnus-summary-update-secondary-mark (article)
10223   "Update the secondary (read, process, cache) mark."
10224   (gnus-summary-update-mark
10225    (cond ((memq article gnus-newsgroup-processable)
10226           gnus-process-mark)
10227          ((memq article gnus-newsgroup-cached)
10228           gnus-cached-mark)
10229          ((memq article gnus-newsgroup-replied)
10230           gnus-replied-mark)
10231          ((memq article gnus-newsgroup-forwarded)
10232           gnus-forwarded-mark)
10233          ((memq article gnus-newsgroup-saved)
10234           gnus-saved-mark)
10235          ((memq article gnus-newsgroup-recent)
10236           gnus-recent-mark)
10237          ((memq article gnus-newsgroup-unseen)
10238           gnus-unseen-mark)
10239          (t gnus-no-mark))
10240    'replied)
10241   (when (gnus-visual-p 'summary-highlight 'highlight)
10242     (gnus-run-hooks 'gnus-summary-update-hook))
10243   t)
10244
10245 (defun gnus-summary-update-download-mark (article)
10246   "Update the download mark."
10247   (gnus-summary-update-mark
10248    (cond ((memq article gnus-newsgroup-undownloaded)
10249           gnus-undownloaded-mark)
10250          (gnus-newsgroup-agentized
10251           gnus-downloaded-mark)
10252          (t
10253           gnus-no-mark))
10254    'download)
10255   (gnus-summary-update-line t)
10256   t)
10257
10258 (defun gnus-summary-update-mark (mark type)
10259   (let ((forward (cdr (assq type gnus-summary-mark-positions)))
10260         (buffer-read-only nil))
10261     (re-search-backward "[\n\r]" (gnus-point-at-bol) 'move-to-limit)
10262     (when forward
10263       (when (looking-at "\r")
10264         (incf forward))
10265       (when (<= (+ forward (point)) (point-max))
10266         ;; Go to the right position on the line.
10267         (goto-char (+ forward (point)))
10268         ;; Replace the old mark with the new mark.
10269         (subst-char-in-region (point) (1+ (point)) (char-after) mark)
10270         ;; Optionally update the marks by some user rule.
10271         (when (eq type 'unread)
10272           (gnus-data-set-mark
10273            (gnus-data-find (gnus-summary-article-number)) mark)
10274           (gnus-summary-update-line (eq mark gnus-unread-mark)))))))
10275
10276 (defun gnus-mark-article-as-read (article &optional mark)
10277   "Enter ARTICLE in the pertinent lists and remove it from others."
10278   ;; Make the article expirable.
10279   (let ((mark (or mark gnus-del-mark)))
10280     (setq gnus-newsgroup-expirable
10281           (if (= mark gnus-expirable-mark)
10282               (gnus-add-to-sorted-list gnus-newsgroup-expirable article)
10283             (delq article gnus-newsgroup-expirable)))
10284     ;; Remove from unread and marked lists.
10285     (setq gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
10286     (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked))
10287     (setq gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked))
10288     (setq gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant))
10289     (push (cons article mark) gnus-newsgroup-reads)
10290     ;; Possibly remove from cache, if that is used.
10291     (when gnus-use-cache
10292       (gnus-cache-enter-remove-article article))
10293     t))
10294
10295 (defun gnus-mark-article-as-unread (article &optional mark)
10296   "Enter ARTICLE in the pertinent lists and remove it from others."
10297   (let ((mark (or mark gnus-ticked-mark)))
10298     (if (<= article 0)
10299         (progn
10300           (gnus-error 1 "Can't mark negative article numbers")
10301           nil)
10302       (setq gnus-newsgroup-marked (delq article gnus-newsgroup-marked)
10303             gnus-newsgroup-spam-marked (delq article gnus-newsgroup-spam-marked)
10304             gnus-newsgroup-dormant (delq article gnus-newsgroup-dormant)
10305             gnus-newsgroup-expirable (delq article gnus-newsgroup-expirable)
10306             gnus-newsgroup-unreads (delq article gnus-newsgroup-unreads))
10307
10308       ;; Unsuppress duplicates?
10309       (when gnus-suppress-duplicates
10310         (gnus-dup-unsuppress-article article))
10311
10312       (cond ((= mark gnus-ticked-mark)
10313              (setq gnus-newsgroup-marked
10314                    (gnus-add-to-sorted-list gnus-newsgroup-marked article)))
10315             ((= mark gnus-spam-mark)
10316              (setq gnus-newsgroup-spam-marked
10317                    (gnus-add-to-sorted-list gnus-newsgroup-spam-marked
10318                                             article)))
10319             ((= mark gnus-dormant-mark)
10320              (setq gnus-newsgroup-dormant
10321                    (gnus-add-to-sorted-list gnus-newsgroup-dormant article)))
10322             (t
10323              (setq gnus-newsgroup-unreads
10324                    (gnus-add-to-sorted-list gnus-newsgroup-unreads article))))
10325       (gnus-pull article gnus-newsgroup-reads)
10326       t)))
10327
10328 (defalias 'gnus-summary-mark-as-unread-forward
10329   'gnus-summary-tick-article-forward)
10330 (make-obsolete 'gnus-summary-mark-as-unread-forward
10331                'gnus-summary-tick-article-forward)
10332 (defun gnus-summary-tick-article-forward (n)
10333   "Tick N articles forwards.
10334 If N is negative, tick backwards instead.
10335 The difference between N and the number of articles ticked is returned."
10336   (interactive "p")
10337   (gnus-summary-mark-forward n gnus-ticked-mark))
10338
10339 (defalias 'gnus-summary-mark-as-unread-backward
10340   'gnus-summary-tick-article-backward)
10341 (make-obsolete 'gnus-summary-mark-as-unread-backward
10342                'gnus-summary-tick-article-backward)
10343 (defun gnus-summary-tick-article-backward (n)
10344   "Tick N articles backwards.
10345 The difference between N and the number of articles ticked is returned."
10346   (interactive "p")
10347   (gnus-summary-mark-forward (- n) gnus-ticked-mark))
10348
10349 (defalias 'gnus-summary-mark-as-unread 'gnus-summary-tick-article)
10350 (make-obsolete 'gnus-summary-mark-as-unread 'gnus-summary-tick-article)
10351 (defun gnus-summary-tick-article (&optional article clear-mark)
10352   "Mark current article as unread.
10353 Optional 1st argument ARTICLE specifies article number to be marked as unread.
10354 Optional 2nd argument CLEAR-MARK remove any kinds of mark."
10355   (interactive)
10356   (gnus-summary-mark-article article (if clear-mark gnus-unread-mark
10357                                        gnus-ticked-mark)))
10358
10359 (defun gnus-summary-mark-as-read-forward (n)
10360   "Mark N articles as read forwards.
10361 If N is negative, mark backwards instead.
10362 The difference between N and the actual number of articles marked is
10363 returned."
10364   (interactive "p")
10365   (gnus-summary-mark-forward n gnus-del-mark gnus-inhibit-user-auto-expire))
10366
10367 (defun gnus-summary-mark-as-read-backward (n)
10368   "Mark the N articles as read backwards.
10369 The difference between N and the actual number of articles marked is
10370 returned."
10371   (interactive "p")
10372   (gnus-summary-mark-forward
10373    (- n) gnus-del-mark gnus-inhibit-user-auto-expire))
10374
10375 (defun gnus-summary-mark-as-read (&optional article mark)
10376   "Mark current article as read.
10377 ARTICLE specifies the article to be marked as read.
10378 MARK specifies a string to be inserted at the beginning of the line."
10379   (gnus-summary-mark-article article mark))
10380
10381 (defun gnus-summary-clear-mark-forward (n)
10382   "Clear marks from N articles forward.
10383 If N is negative, clear backward instead.
10384 The difference between N and the number of marks cleared is returned."
10385   (interactive "p")
10386   (gnus-summary-mark-forward n gnus-unread-mark))
10387
10388 (defun gnus-summary-clear-mark-backward (n)
10389   "Clear marks from N articles backward.
10390 The difference between N and the number of marks cleared is returned."
10391   (interactive "p")
10392   (gnus-summary-mark-forward (- n) gnus-unread-mark))
10393
10394 (defun gnus-summary-mark-unread-as-read ()
10395   "Intended to be used by `gnus-summary-mark-article-hook'."
10396   (when (memq gnus-current-article gnus-newsgroup-unreads)
10397     (gnus-summary-mark-article gnus-current-article gnus-read-mark)))
10398
10399 (defun gnus-summary-mark-read-and-unread-as-read (&optional new-mark)
10400   "Intended to be used by `gnus-summary-mark-article-hook'."
10401   (let ((mark (gnus-summary-article-mark)))
10402     (when (or (gnus-unread-mark-p mark)
10403               (gnus-read-mark-p mark))
10404       (gnus-summary-mark-article gnus-current-article
10405                                  (or new-mark gnus-read-mark)))))
10406
10407 (defun gnus-summary-mark-current-read-and-unread-as-read (&optional new-mark)
10408   "Intended to be used by `gnus-summary-mark-article-hook'."
10409   (let ((mark (gnus-summary-article-mark)))
10410     (when (or (gnus-unread-mark-p mark)
10411               (gnus-read-mark-p mark))
10412       (gnus-summary-mark-article (gnus-summary-article-number)
10413                                  (or new-mark gnus-read-mark)))))
10414
10415 (defun gnus-summary-mark-unread-as-ticked ()
10416   "Intended to be used by `gnus-summary-mark-article-hook'."
10417   (when (memq gnus-current-article gnus-newsgroup-unreads)
10418     (gnus-summary-mark-article gnus-current-article gnus-ticked-mark)))
10419
10420 (defun gnus-summary-mark-region-as-read (point mark all)
10421   "Mark all unread articles between point and mark as read.
10422 If given a prefix, mark all articles between point and mark as read,
10423 even ticked and dormant ones."
10424   (interactive "r\nP")
10425   (save-excursion
10426     (let (article)
10427       (goto-char point)
10428       (beginning-of-line)
10429       (while (and
10430               (< (point) mark)
10431               (progn
10432                 (when (or all
10433                           (memq (setq article (gnus-summary-article-number))
10434                                 gnus-newsgroup-unreads))
10435                   (gnus-summary-mark-article article gnus-del-mark))
10436                 t)
10437               (gnus-summary-find-next))))))
10438
10439 (defun gnus-summary-mark-below (score mark)
10440   "Mark articles with score less than SCORE with MARK."
10441   (interactive "P\ncMark: ")
10442   (setq score (if score
10443                   (prefix-numeric-value score)
10444                 (or gnus-summary-default-score 0)))
10445   (save-excursion
10446     (set-buffer gnus-summary-buffer)
10447     (goto-char (point-min))
10448     (while
10449         (progn
10450           (and (< (gnus-summary-article-score) score)
10451                (gnus-summary-mark-article nil mark))
10452           (gnus-summary-find-next)))))
10453
10454 (defun gnus-summary-kill-below (&optional score)
10455   "Mark articles with score below SCORE as read."
10456   (interactive "P")
10457   (gnus-summary-mark-below score gnus-killed-mark))
10458
10459 (defun gnus-summary-clear-above (&optional score)
10460   "Clear all marks from articles with score above SCORE."
10461   (interactive "P")
10462   (gnus-summary-mark-above score gnus-unread-mark))
10463
10464 (defun gnus-summary-tick-above (&optional score)
10465   "Tick all articles with score above SCORE."
10466   (interactive "P")
10467   (gnus-summary-mark-above score gnus-ticked-mark))
10468
10469 (defun gnus-summary-mark-above (score mark)
10470   "Mark articles with score over SCORE with MARK."
10471   (interactive "P\ncMark: ")
10472   (setq score (if score
10473                   (prefix-numeric-value score)
10474                 (or gnus-summary-default-score 0)))
10475   (save-excursion
10476     (set-buffer gnus-summary-buffer)
10477     (goto-char (point-min))
10478     (while (and (progn
10479                   (when (> (gnus-summary-article-score) score)
10480                     (gnus-summary-mark-article nil mark))
10481                   t)
10482                 (gnus-summary-find-next)))))
10483
10484 ;; Suggested by Daniel Quinlan <quinlan@best.com>.
10485 (defalias 'gnus-summary-show-all-expunged 'gnus-summary-limit-include-expunged)
10486 (defun gnus-summary-limit-include-expunged (&optional no-error)
10487   "Display all the hidden articles that were expunged for low scores."
10488   (interactive)
10489   (let ((buffer-read-only nil))
10490     (let ((scored gnus-newsgroup-scored)
10491           headers h)
10492       (while scored
10493         (unless (gnus-summary-article-header (caar scored))
10494           (and (setq h (gnus-number-to-header (caar scored)))
10495                (< (cdar scored) gnus-summary-expunge-below)
10496                (push h headers)))
10497         (setq scored (cdr scored)))
10498       (if (not headers)
10499           (when (not no-error)
10500             (error "No expunged articles hidden"))
10501         (goto-char (point-min))
10502         (push gnus-newsgroup-limit gnus-newsgroup-limits)
10503         (setq gnus-newsgroup-limit (copy-sequence gnus-newsgroup-limit))
10504         (mapcar (lambda (x) (push (mail-header-number x)
10505                                   gnus-newsgroup-limit))
10506                 headers)
10507         (gnus-summary-prepare-unthreaded (nreverse headers))
10508         (goto-char (point-min))
10509         (gnus-summary-position-point)
10510         t))))
10511
10512 (defun gnus-summary-catchup (&optional all quietly to-here not-mark reverse)
10513   "Mark all unread articles in this newsgroup as read.
10514 If prefix argument ALL is non-nil, ticked and dormant articles will
10515 also be marked as read.
10516 If QUIETLY is non-nil, no questions will be asked.
10517
10518 If TO-HERE is non-nil, it should be a point in the buffer.  All
10519 articles before (after, if REVERSE is set) this point will be marked
10520 as read.
10521
10522 Note that this function will only catch up the unread article
10523 in the current summary buffer limitation.
10524
10525 The number of articles marked as read is returned."
10526   (interactive "P")
10527   (prog1
10528       (save-excursion
10529         (when (or quietly
10530                   (not gnus-interactive-catchup) ;Without confirmation?
10531                   gnus-expert-user
10532                   (gnus-y-or-n-p
10533                    (if all
10534                        "Mark absolutely all articles as read? "
10535                      "Mark all unread articles as read? ")))
10536           (if (and not-mark
10537                    (not gnus-newsgroup-adaptive)
10538                    (not gnus-newsgroup-auto-expire)
10539                    (not gnus-suppress-duplicates)
10540                    (or (not gnus-use-cache)
10541                        (eq gnus-use-cache 'passive)))
10542               (progn
10543                 (when all
10544                   (setq gnus-newsgroup-marked nil
10545                         gnus-newsgroup-spam-marked nil
10546                         gnus-newsgroup-dormant nil))
10547                 (setq gnus-newsgroup-unreads
10548                       (gnus-sorted-nunion
10549                        (gnus-sorted-intersection gnus-newsgroup-unreads
10550                                                  gnus-newsgroup-downloadable)
10551                        (gnus-sorted-difference gnus-newsgroup-unfetched
10552                                                gnus-newsgroup-cached))))
10553             ;; We actually mark all articles as canceled, which we
10554             ;; have to do when using auto-expiry or adaptive scoring.
10555             (gnus-summary-show-all-threads)
10556             (if (and to-here reverse)
10557                 (progn
10558                   (goto-char to-here)
10559                   (gnus-summary-mark-current-read-and-unread-as-read
10560                    gnus-catchup-mark)
10561                   (while (gnus-summary-find-next (not all))
10562                     (gnus-summary-mark-article-as-read gnus-catchup-mark)))
10563               (when (gnus-summary-first-subject (not all))
10564                 (while (and
10565                         (if to-here (< (point) to-here) t)
10566                         (gnus-summary-mark-article-as-read gnus-catchup-mark)
10567                         (gnus-summary-find-next (not all))))))
10568             (gnus-set-mode-line 'summary))
10569           t))
10570     (gnus-summary-position-point)))
10571
10572 (defun gnus-summary-catchup-to-here (&optional all)
10573   "Mark all unticked articles before the current one as read.
10574 If ALL is non-nil, also mark ticked and dormant articles as read."
10575   (interactive "P")
10576   (save-excursion
10577     (gnus-save-hidden-threads
10578       (let ((beg (point)))
10579         ;; We check that there are unread articles.
10580         (when (or all (gnus-summary-find-prev))
10581           (gnus-summary-catchup all t beg)))))
10582   (gnus-summary-position-point))
10583
10584 (defun gnus-summary-catchup-from-here (&optional all)
10585   "Mark all unticked articles after (and including) the current one as read.
10586 If ALL is non-nil, also mark ticked and dormant articles as read."
10587   (interactive "P")
10588   (save-excursion
10589     (gnus-save-hidden-threads
10590       (let ((beg (point)))
10591         ;; We check that there are unread articles.
10592         (when (or all (gnus-summary-find-next))
10593           (gnus-summary-catchup all t beg nil t)))))
10594   (gnus-summary-position-point))
10595
10596 (defun gnus-summary-catchup-all (&optional quietly)
10597   "Mark all articles in this newsgroup as read.
10598 This command is dangerous.  Normally, you want \\[gnus-summary-catchup]
10599 instead, which marks only unread articles as read."
10600   (interactive "P")
10601   (gnus-summary-catchup t quietly))
10602
10603 (defun gnus-summary-catchup-and-exit (&optional all quietly)
10604   "Mark all unread articles in this group as read, then exit.
10605 If prefix argument ALL is non-nil, all articles are marked as read.
10606 If QUIETLY is non-nil, no questions will be asked."
10607   (interactive "P")
10608   (when (gnus-summary-catchup all quietly nil 'fast)
10609     ;; Select next newsgroup or exit.
10610     (if (and (not (gnus-group-quit-config gnus-newsgroup-name))
10611              (eq gnus-auto-select-next 'quietly))
10612         (gnus-summary-next-group nil)
10613       (gnus-summary-exit))))
10614
10615 (defun gnus-summary-catchup-all-and-exit (&optional quietly)
10616   "Mark all articles in this newsgroup as read, and then exit.
10617 This command is dangerous.  Normally, you want \\[gnus-summary-catchup-and-exit]
10618 instead, which marks only unread articles as read."
10619   (interactive "P")
10620   (gnus-summary-catchup-and-exit t quietly))
10621
10622 (defun gnus-summary-catchup-and-goto-next-group (&optional all)
10623   "Mark all articles in this group as read and select the next group.
10624 If given a prefix, mark all articles, unread as well as ticked, as
10625 read."
10626   (interactive "P")
10627   (save-excursion
10628     (gnus-summary-catchup all))
10629   (gnus-summary-next-group))
10630
10631 ;;;
10632 ;;; with article
10633 ;;;
10634
10635 (defmacro gnus-with-article (article &rest forms)
10636   "Select ARTICLE and perform FORMS in the original article buffer.
10637 Then replace the article with the result."
10638   `(progn
10639      ;; We don't want the article to be marked as read.
10640      (let (gnus-mark-article-hook)
10641        (gnus-summary-select-article t t nil ,article))
10642      (set-buffer gnus-original-article-buffer)
10643      ,@forms
10644      (if (not (gnus-check-backend-function
10645                'request-replace-article (car gnus-article-current)))
10646          (gnus-message 5 "Read-only group; not replacing")
10647        (unless (gnus-request-replace-article
10648                 ,article (car gnus-article-current)
10649                 (current-buffer) t)
10650          (error "Couldn't replace article")))
10651      ;; The cache and backlog have to be flushed somewhat.
10652      (when gnus-keep-backlog
10653        (gnus-backlog-remove-article
10654         (car gnus-article-current) (cdr gnus-article-current)))
10655      (when gnus-use-cache
10656        (gnus-cache-update-article
10657         (car gnus-article-current) (cdr gnus-article-current)))))
10658
10659 (put 'gnus-with-article 'lisp-indent-function 1)
10660 (put 'gnus-with-article 'edebug-form-spec '(form body))
10661
10662 ;; Thread-based commands.
10663
10664 (defun gnus-summary-articles-in-thread (&optional article)
10665   "Return a list of all articles in the current thread.
10666 If ARTICLE is non-nil, return all articles in the thread that starts
10667 with that article."
10668   (let* ((article (or article (gnus-summary-article-number)))
10669          (data (gnus-data-find-list article))
10670          (top-level (gnus-data-level (car data)))
10671          (top-subject
10672           (cond ((null gnus-thread-operation-ignore-subject)
10673                  (gnus-simplify-subject-re
10674                   (mail-header-subject (gnus-data-header (car data)))))
10675                 ((eq gnus-thread-operation-ignore-subject 'fuzzy)
10676                  (gnus-simplify-subject-fuzzy
10677                   (mail-header-subject (gnus-data-header (car data)))))
10678                 (t nil)))
10679          (end-point (save-excursion
10680                       (if (gnus-summary-go-to-next-thread)
10681                           (point) (point-max))))
10682          articles)
10683     (while (and data
10684                 (< (gnus-data-pos (car data)) end-point))
10685       (when (or (not top-subject)
10686                 (string= top-subject
10687                          (if (eq gnus-thread-operation-ignore-subject 'fuzzy)
10688                              (gnus-simplify-subject-fuzzy
10689                               (mail-header-subject
10690                                (gnus-data-header (car data))))
10691                            (gnus-simplify-subject-re
10692                             (mail-header-subject
10693                              (gnus-data-header (car data)))))))
10694         (push (gnus-data-number (car data)) articles))
10695       (unless (and (setq data (cdr data))
10696                    (> (gnus-data-level (car data)) top-level))
10697         (setq data nil)))
10698     ;; Return the list of articles.
10699     (nreverse articles)))
10700
10701 (defun gnus-summary-rethread-current ()
10702   "Rethread the thread the current article is part of."
10703   (interactive)
10704   (let* ((gnus-show-threads t)
10705          (article (gnus-summary-article-number))
10706          (id (mail-header-id (gnus-summary-article-header)))
10707          (gnus-newsgroup-threads (list (gnus-id-to-thread (gnus-root-id id)))))
10708     (unless id
10709       (error "No article on the current line"))
10710     (gnus-rebuild-thread id)
10711     (gnus-summary-goto-subject article)))
10712
10713 (defun gnus-summary-reparent-thread ()
10714   "Make the current article child of the marked (or previous) article.
10715
10716 Note that the re-threading will only work if `gnus-thread-ignore-subject'
10717 is non-nil or the Subject: of both articles are the same."
10718   (interactive)
10719   (unless (not (gnus-group-read-only-p))
10720     (error "The current newsgroup does not support article editing"))
10721   (unless (<= (length gnus-newsgroup-processable) 1)
10722     (error "No more than one article may be marked"))
10723   (save-window-excursion
10724     (let ((gnus-article-buffer " *reparent*")
10725           (current-article (gnus-summary-article-number))
10726           ;; First grab the marked article, otherwise one line up.
10727           (parent-article (if (not (null gnus-newsgroup-processable))
10728                               (car gnus-newsgroup-processable)
10729                             (save-excursion
10730                               (if (eq (forward-line -1) 0)
10731                                   (gnus-summary-article-number)
10732                                 (error "Beginning of summary buffer"))))))
10733       (unless (not (eq current-article parent-article))
10734         (error "An article may not be self-referential"))
10735       (let ((message-id (mail-header-id
10736                          (gnus-summary-article-header parent-article))))
10737         (unless (and message-id (not (equal message-id "")))
10738           (error "No message-id in desired parent"))
10739         (gnus-with-article current-article
10740           (save-restriction
10741             (goto-char (point-min))
10742             (message-narrow-to-head)
10743             (if (re-search-forward "^References: " nil t)
10744                 (progn
10745                   (re-search-forward "^[^ \t]" nil t)
10746                   (forward-line -1)
10747                   (end-of-line)
10748                   (insert " " message-id))
10749               (insert "References: " message-id "\n"))))
10750         (set-buffer gnus-summary-buffer)
10751         (gnus-summary-unmark-all-processable)
10752         (gnus-summary-update-article current-article)
10753         (if (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
10754             (gnus-summary-update-secondary-mark (cdr gnus-article-current)))
10755         (gnus-summary-rethread-current)
10756         (gnus-message 3 "Article %d is now the child of article %d"
10757                       current-article parent-article)))))
10758
10759 (defun gnus-summary-toggle-threads (&optional arg)
10760   "Toggle showing conversation threads.
10761 If ARG is positive number, turn showing conversation threads on."
10762   (interactive "P")
10763   (let ((current (or (gnus-summary-article-number) gnus-newsgroup-end)))
10764     (setq gnus-show-threads
10765           (if (null arg) (not gnus-show-threads)
10766             (> (prefix-numeric-value arg) 0)))
10767     (gnus-summary-prepare)
10768     (gnus-summary-goto-subject current)
10769     (gnus-message 6 "Threading is now %s" (if gnus-show-threads "on" "off"))
10770     (gnus-summary-position-point)))
10771
10772 (defun gnus-summary-show-all-threads ()
10773   "Show all threads."
10774   (interactive)
10775   (save-excursion
10776     (let ((buffer-read-only nil))
10777       (subst-char-in-region (point-min) (point-max) ?\^M ?\n t)))
10778   (gnus-summary-position-point))
10779
10780 (defun gnus-summary-show-thread ()
10781   "Show thread subtrees.
10782 Returns nil if no thread was there to be shown."
10783   (interactive)
10784   (let ((buffer-read-only nil)
10785         (orig (point))
10786         (end (gnus-point-at-eol))
10787         ;; Leave point at bol
10788         (beg (progn (beginning-of-line) (point))))
10789     (prog1
10790         ;; Any hidden lines here?
10791         (search-forward "\r" end t)
10792       (subst-char-in-region beg end ?\^M ?\n t)
10793       (goto-char orig)
10794       (gnus-summary-position-point))))
10795
10796 (defun gnus-summary-maybe-hide-threads ()
10797   "If requested, hide the threads that should be hidden."
10798   (when (and gnus-show-threads
10799              gnus-thread-hide-subtree)
10800     (gnus-summary-hide-all-threads
10801      (if (or (consp gnus-thread-hide-subtree)
10802              (functionp gnus-thread-hide-subtree))
10803          (gnus-make-predicate gnus-thread-hide-subtree)
10804        nil))))
10805
10806 ;;; Hiding predicates.
10807
10808 (defun gnus-article-unread-p (header)
10809   (memq (mail-header-number header) gnus-newsgroup-unreads))
10810
10811 (defun gnus-article-unseen-p (header)
10812   (memq (mail-header-number header) gnus-newsgroup-unseen))
10813
10814 (defun gnus-map-articles (predicate articles)
10815   "Map PREDICATE over ARTICLES and return non-nil if any predicate is non-nil."
10816   (apply 'gnus-or (mapcar predicate
10817                           (mapcar (lambda (number)
10818                                     (gnus-summary-article-header number))
10819                                   articles))))
10820
10821 (defun gnus-summary-hide-all-threads (&optional predicate)
10822   "Hide all thread subtrees.
10823 If PREDICATE is supplied, threads that satisfy this predicate
10824 will not be hidden."
10825   (interactive)
10826   (save-excursion
10827     (goto-char (point-min))
10828     (let ((end nil))
10829       (while (not end)
10830         (when (or (not predicate)
10831                   (gnus-map-articles
10832                    predicate (gnus-summary-article-children)))
10833             (gnus-summary-hide-thread))
10834         (setq end (not (zerop (gnus-summary-next-thread 1 t)))))))
10835   (gnus-summary-position-point))
10836
10837 (defun gnus-summary-hide-thread ()
10838   "Hide thread subtrees.
10839 If PREDICATE is supplied, threads that satisfy this predicate
10840 will not be hidden.
10841 Returns nil if no threads were there to be hidden."
10842   (interactive)
10843   (let ((buffer-read-only nil)
10844         (start (point))
10845         (article (gnus-summary-article-number)))
10846     (goto-char start)
10847     ;; Go forward until either the buffer ends or the subthread
10848     ;; ends.
10849     (when (and (not (eobp))
10850                (or (zerop (gnus-summary-next-thread 1 t))
10851                    (goto-char (point-max))))
10852       (prog1
10853           (if (and (> (point) start)
10854                    (search-backward "\n" start t))
10855               (progn
10856                 (subst-char-in-region start (point) ?\n ?\^M)
10857                 (gnus-summary-goto-subject article))
10858             (goto-char start)
10859             nil)))))
10860
10861 (defun gnus-summary-go-to-next-thread (&optional previous)
10862   "Go to the same level (or less) next thread.
10863 If PREVIOUS is non-nil, go to previous thread instead.
10864 Return the article number moved to, or nil if moving was impossible."
10865   (let ((level (gnus-summary-thread-level))
10866         (way (if previous -1 1))
10867         (beg (point)))
10868     (forward-line way)
10869     (while (and (not (eobp))
10870                 (< level (gnus-summary-thread-level)))
10871       (forward-line way))
10872     (if (eobp)
10873         (progn
10874           (goto-char beg)
10875           nil)
10876       (setq beg (point))
10877       (prog1
10878           (gnus-summary-article-number)
10879         (goto-char beg)))))
10880
10881 (defun gnus-summary-next-thread (n &optional silent)
10882   "Go to the same level next N'th thread.
10883 If N is negative, search backward instead.
10884 Returns the difference between N and the number of skips actually
10885 done.
10886
10887 If SILENT, don't output messages."
10888   (interactive "p")
10889   (let ((backward (< n 0))
10890         (n (abs n)))
10891     (while (and (> n 0)
10892                 (gnus-summary-go-to-next-thread backward))
10893       (decf n))
10894     (unless silent
10895       (gnus-summary-position-point))
10896     (when (and (not silent) (/= 0 n))
10897       (gnus-message 7 "No more threads"))
10898     n))
10899
10900 (defun gnus-summary-prev-thread (n)
10901   "Go to the same level previous N'th thread.
10902 Returns the difference between N and the number of skips actually
10903 done."
10904   (interactive "p")
10905   (gnus-summary-next-thread (- n)))
10906
10907 (defun gnus-summary-go-down-thread ()
10908   "Go down one level in the current thread."
10909   (let ((children (gnus-summary-article-children)))
10910     (when children
10911       (gnus-summary-goto-subject (car children)))))
10912
10913 (defun gnus-summary-go-up-thread ()
10914   "Go up one level in the current thread."
10915   (let ((parent (gnus-summary-article-parent)))
10916     (when parent
10917       (gnus-summary-goto-subject parent))))
10918
10919 (defun gnus-summary-down-thread (n)
10920   "Go down thread N steps.
10921 If N is negative, go up instead.
10922 Returns the difference between N and how many steps down that were
10923 taken."
10924   (interactive "p")
10925   (let ((up (< n 0))
10926         (n (abs n)))
10927     (while (and (> n 0)
10928                 (if up (gnus-summary-go-up-thread)
10929                   (gnus-summary-go-down-thread)))
10930       (setq n (1- n)))
10931     (gnus-summary-position-point)
10932     (when (/= 0 n)
10933       (gnus-message 7 "Can't go further"))
10934     n))
10935
10936 (defun gnus-summary-up-thread (n)
10937   "Go up thread N steps.
10938 If N is negative, go down instead.
10939 Returns the difference between N and how many steps down that were
10940 taken."
10941   (interactive "p")
10942   (gnus-summary-down-thread (- n)))
10943
10944 (defun gnus-summary-top-thread ()
10945   "Go to the top of the thread."
10946   (interactive)
10947   (while (gnus-summary-go-up-thread))
10948   (gnus-summary-article-number))
10949
10950 (defun gnus-summary-kill-thread (&optional unmark)
10951   "Mark articles under current thread as read.
10952 If the prefix argument is positive, remove any kinds of marks.
10953 If the prefix argument is negative, tick articles instead."
10954   (interactive "P")
10955   (when unmark
10956     (setq unmark (prefix-numeric-value unmark)))
10957   (let ((articles (gnus-summary-articles-in-thread)))
10958     (save-excursion
10959       ;; Expand the thread.
10960       (gnus-summary-show-thread)
10961       ;; Mark all the articles.
10962       (while articles
10963         (gnus-summary-goto-subject (car articles))
10964         (cond ((null unmark)
10965                (gnus-summary-mark-article-as-read gnus-killed-mark))
10966               ((> unmark 0)
10967                (gnus-summary-mark-article-as-unread gnus-unread-mark))
10968               (t
10969                (gnus-summary-mark-article-as-unread gnus-ticked-mark)))
10970         (setq articles (cdr articles))))
10971     ;; Hide killed subtrees.
10972     (and (null unmark)
10973          gnus-thread-hide-killed
10974          (gnus-summary-hide-thread))
10975     ;; If marked as read, go to next unread subject.
10976     (when (null unmark)
10977       ;; Go to next unread subject.
10978       (gnus-summary-next-subject 1 t)))
10979   (gnus-set-mode-line 'summary))
10980
10981 ;; Summary sorting commands
10982
10983 (defun gnus-summary-sort-by-number (&optional reverse)
10984   "Sort the summary buffer by article number.
10985 Argument REVERSE means reverse order."
10986   (interactive "P")
10987   (gnus-summary-sort 'number reverse))
10988
10989 (defun gnus-summary-sort-by-random (&optional reverse)
10990   "Randomize the order in the summary buffer.
10991 Argument REVERSE means to randomize in reverse order."
10992   (interactive "P")
10993   (gnus-summary-sort 'random reverse))
10994
10995 (defun gnus-summary-sort-by-author (&optional reverse)
10996   "Sort the summary buffer by author name alphabetically.
10997 If `case-fold-search' is non-nil, case of letters is ignored.
10998 Argument REVERSE means reverse order."
10999   (interactive "P")
11000   (gnus-summary-sort 'author reverse))
11001
11002 (defun gnus-summary-sort-by-subject (&optional reverse)
11003   "Sort the summary buffer by subject alphabetically.  `Re:'s are ignored.
11004 If `case-fold-search' is non-nil, case of letters is ignored.
11005 Argument REVERSE means reverse order."
11006   (interactive "P")
11007   (gnus-summary-sort 'subject reverse))
11008
11009 (defun gnus-summary-sort-by-date (&optional reverse)
11010   "Sort the summary buffer by date.
11011 Argument REVERSE means reverse order."
11012   (interactive "P")
11013   (gnus-summary-sort 'date reverse))
11014
11015 (defun gnus-summary-sort-by-score (&optional reverse)
11016   "Sort the summary buffer by score.
11017 Argument REVERSE means reverse order."
11018   (interactive "P")
11019   (gnus-summary-sort 'score reverse))
11020
11021 (defun gnus-summary-sort-by-lines (&optional reverse)
11022   "Sort the summary buffer by the number of lines.
11023 Argument REVERSE means reverse order."
11024   (interactive "P")
11025   (gnus-summary-sort 'lines reverse))
11026
11027 (defun gnus-summary-sort-by-chars (&optional reverse)
11028   "Sort the summary buffer by article length.
11029 Argument REVERSE means reverse order."
11030   (interactive "P")
11031   (gnus-summary-sort 'chars reverse))
11032
11033 (defun gnus-summary-sort-by-original (&optional reverse)
11034   "Sort the summary buffer using the default sorting method.
11035 Argument REVERSE means reverse order."
11036   (interactive "P")
11037   (let* ((buffer-read-only)
11038          (gnus-summary-prepare-hook nil))
11039     ;; We do the sorting by regenerating the threads.
11040     (gnus-summary-prepare)
11041     ;; Hide subthreads if needed.
11042     (gnus-summary-maybe-hide-threads)))
11043
11044 (defun gnus-summary-sort (predicate reverse)
11045   "Sort summary buffer by PREDICATE.  REVERSE means reverse order."
11046   (let* ((thread (intern (format "gnus-thread-sort-by-%s" predicate)))
11047          (article (intern (format "gnus-article-sort-by-%s" predicate)))
11048          (gnus-thread-sort-functions
11049           (if (not reverse)
11050               thread
11051             `(lambda (t1 t2)
11052                (,thread t2 t1))))
11053          (gnus-sort-gathered-threads-function
11054           gnus-thread-sort-functions)
11055          (gnus-article-sort-functions
11056           (if (not reverse)
11057               article
11058             `(lambda (t1 t2)
11059                (,article t2 t1))))
11060          (buffer-read-only)
11061          (gnus-summary-prepare-hook nil))
11062     ;; We do the sorting by regenerating the threads.
11063     (gnus-summary-prepare)
11064     ;; Hide subthreads if needed.
11065     (gnus-summary-maybe-hide-threads)))
11066
11067 ;; Summary saving commands.
11068
11069 (defun gnus-summary-save-article (&optional n not-saved)
11070   "Save the current article using the default saver function.
11071 If N is a positive number, save the N next articles.
11072 If N is a negative number, save the N previous articles.
11073 If N is nil and any articles have been marked with the process mark,
11074 save those articles instead.
11075 The variable `gnus-default-article-saver' specifies the saver function.
11076
11077 If the optional second argument NOT-SAVED is non-nil, articles saved
11078 will not be marked as saved."
11079   (interactive "P")
11080   (require 'gnus-art)
11081   (let* ((articles (gnus-summary-work-articles n))
11082          (save-buffer (save-excursion
11083                         (nnheader-set-temp-buffer " *Gnus Save*")))
11084          (num (length articles))
11085          ;; Whether to save decoded articles or raw articles.
11086          (decode (when gnus-article-save-coding-system
11087                    (get gnus-default-article-saver :decode)))
11088          ;; When saving many articles in a single file, use the other
11089          ;; function to save articles other than the first one.
11090          (saver2 (get gnus-default-article-saver :function))
11091          (gnus-prompt-before-saving (if saver2
11092                                         t
11093                                       gnus-prompt-before-saving))
11094          (gnus-default-article-saver gnus-default-article-saver)
11095          header file)
11096     (dolist (article articles)
11097       (setq header (gnus-summary-article-header article))
11098       (if (not (vectorp header))
11099           ;; This is a pseudo-article.
11100           (if (assq 'name header)
11101               (gnus-copy-file (cdr (assq 'name header)))
11102             (gnus-message 1 "Article %d is unsaveable" article))
11103         ;; This is a real article.
11104         (save-window-excursion
11105           (let ((gnus-display-mime-function (when decode
11106                                               gnus-display-mime-function))
11107                 (gnus-article-prepare-hook (when decode
11108                                              gnus-article-prepare-hook)))
11109             (gnus-summary-select-article t nil nil article)
11110             (gnus-summary-goto-subject article)))
11111         (save-excursion
11112           (set-buffer save-buffer)
11113           (erase-buffer)
11114           (insert-buffer-substring (if decode
11115                                        gnus-article-buffer
11116                                      gnus-original-article-buffer)))
11117         (setq file (gnus-article-save save-buffer file num))
11118         (gnus-summary-remove-process-mark article)
11119         (unless not-saved
11120           (gnus-summary-set-saved-mark article)))
11121       (when saver2
11122         (setq gnus-default-article-saver saver2
11123               saver2 nil)))
11124     (gnus-kill-buffer save-buffer)
11125     (gnus-summary-position-point)
11126     (gnus-set-mode-line 'summary)
11127     n))
11128
11129 (defun gnus-summary-pipe-output (&optional arg headers)
11130   "Pipe the current article to a subprocess.
11131 If N is a positive number, pipe the N next articles.
11132 If N is a negative number, pipe the N previous articles.
11133 If N is nil and any articles have been marked with the process mark,
11134 pipe those articles instead.
11135 If HEADERS (the symbolic prefix), include the headers, too."
11136   (interactive (gnus-interactive "P\ny"))
11137   (require 'gnus-art)
11138   (let ((gnus-default-article-saver 'gnus-summary-save-in-pipe)
11139         (gnus-save-all-headers (or headers gnus-save-all-headers)))
11140     (gnus-summary-save-article arg t))
11141   (let ((buffer (get-buffer "*Shell Command Output*")))
11142     (when (and buffer
11143                (not (zerop (buffer-size buffer))))
11144       (gnus-configure-windows 'pipe))))
11145
11146 (defun gnus-summary-save-article-mail (&optional arg)
11147   "Append the current article to a Unix mail box file.
11148 If N is a positive number, save the N next articles.
11149 If N is a negative number, save the N previous articles.
11150 If N is nil and any articles have been marked with the process mark,
11151 save those articles instead."
11152   (interactive "P")
11153   (require 'gnus-art)
11154   (let ((gnus-default-article-saver 'gnus-summary-save-in-mail))
11155     (gnus-summary-save-article arg)))
11156
11157 (defun gnus-summary-save-article-rmail (&optional arg)
11158   "Append the current article to an rmail file.
11159 If N is a positive number, save the N next articles.
11160 If N is a negative number, save the N previous articles.
11161 If N is nil and any articles have been marked with the process mark,
11162 save those articles instead."
11163   (interactive "P")
11164   (require 'gnus-art)
11165   (let ((gnus-default-article-saver 'gnus-summary-save-in-rmail))
11166     (gnus-summary-save-article arg)))
11167
11168 (defun gnus-summary-save-article-file (&optional arg)
11169   "Append the current article to a file.
11170 If N is a positive number, save the N next articles.
11171 If N is a negative number, save the N previous articles.
11172 If N is nil and any articles have been marked with the process mark,
11173 save those articles instead."
11174   (interactive "P")
11175   (require 'gnus-art)
11176   (let ((gnus-default-article-saver 'gnus-summary-save-in-file))
11177     (gnus-summary-save-article arg)))
11178
11179 (defun gnus-summary-write-article-file (&optional arg)
11180   "Write the current article to a file, deleting the previous file.
11181 If N is a positive number, save the N next articles.
11182 If N is a negative number, save the N previous articles.
11183 If N is nil and any articles have been marked with the process mark,
11184 save those articles instead."
11185   (interactive "P")
11186   (require 'gnus-art)
11187   (let ((gnus-default-article-saver 'gnus-summary-write-to-file))
11188     (gnus-summary-save-article arg)))
11189
11190 (defun gnus-summary-save-article-body-file (&optional arg)
11191   "Append the current article body to a file.
11192 If N is a positive number, save the N next articles.
11193 If N is a negative number, save the N previous articles.
11194 If N is nil and any articles have been marked with the process mark,
11195 save those articles instead."
11196   (interactive "P")
11197   (require 'gnus-art)
11198   (let ((gnus-default-article-saver 'gnus-summary-save-body-in-file))
11199     (gnus-summary-save-article arg)))
11200
11201 (defun gnus-summary-write-article-body-file (&optional arg)
11202   "Write the current article body to a file, deleting the previous file.
11203 If N is a positive number, save the N next articles.
11204 If N is a negative number, save the N previous articles.
11205 If N is nil and any articles have been marked with the process mark,
11206 save those articles instead."
11207   (interactive "P")
11208   (require 'gnus-art)
11209   (let ((gnus-default-article-saver 'gnus-summary-write-body-to-file))
11210     (gnus-summary-save-article arg)))
11211
11212 (defun gnus-summary-muttprint (&optional arg)
11213   "Print the current article using Muttprint.
11214 If N is a positive number, save the N next articles.
11215 If N is a negative number, save the N previous articles.
11216 If N is nil and any articles have been marked with the process mark,
11217 save those articles instead."
11218   (interactive "P")
11219   (require 'gnus-art)
11220   (let ((gnus-default-article-saver 'gnus-summary-pipe-to-muttprint))
11221     (gnus-summary-save-article arg t)))
11222
11223 (defun gnus-summary-pipe-message (program)
11224   "Pipe the current article through PROGRAM."
11225   (interactive "sProgram: ")
11226   (gnus-summary-select-article)
11227   (let ((mail-header-separator ""))
11228     (gnus-eval-in-buffer-window gnus-article-buffer
11229       (save-restriction
11230         (widen)
11231         (let ((start (window-start))
11232               buffer-read-only)
11233           (message-pipe-buffer-body program)
11234           (set-window-start (get-buffer-window (current-buffer)) start))))))
11235
11236 (defun gnus-get-split-value (methods)
11237   "Return a value based on the split METHODS."
11238   (let (split-name method result match)
11239     (when methods
11240       (save-excursion
11241         (set-buffer gnus-original-article-buffer)
11242         (save-restriction
11243           (nnheader-narrow-to-headers)
11244           (while (and methods (not split-name))
11245             (goto-char (point-min))
11246             (setq method (pop methods))
11247             (setq match (car method))
11248             (when (cond
11249                    ((stringp match)
11250                     ;; Regular expression.
11251                     (ignore-errors
11252                       (re-search-forward match nil t)))
11253                    ((functionp match)
11254                     ;; Function.
11255                     (save-restriction
11256                       (widen)
11257                       (setq result (funcall match gnus-newsgroup-name))))
11258                    ((consp match)
11259                     ;; Form.
11260                     (save-restriction
11261                       (widen)
11262                       (setq result (eval match)))))
11263               (setq split-name (cdr method))
11264               (cond ((stringp result)
11265                      (push (expand-file-name
11266                             result gnus-article-save-directory)
11267                            split-name))
11268                     ((consp result)
11269                      (setq split-name (append result split-name)))))))))
11270     (nreverse split-name)))
11271
11272 (defun gnus-valid-move-group-p (group)
11273   (and (boundp group)
11274        (symbol-name group)
11275        (symbol-value group)
11276        (gnus-get-function (gnus-find-method-for-group
11277                            (symbol-name group)) 'request-accept-article t)))
11278
11279 (defun gnus-read-move-group-name (prompt default articles prefix)
11280   "Read a group name."
11281   (let* ((split-name (gnus-get-split-value gnus-move-split-methods))
11282          (minibuffer-confirm-incomplete nil) ; XEmacs
11283          (prom
11284           (format "%s %s to"
11285                   prompt
11286                   (if (> (length articles) 1)
11287                       (format "these %d articles" (length articles))
11288                     "this article")))
11289          (to-newsgroup
11290           (cond
11291            ((null split-name)
11292             (gnus-completing-read-with-default
11293              default prom
11294              gnus-active-hashtb
11295              'gnus-valid-move-group-p
11296              nil prefix
11297              'gnus-group-history))
11298            ((= 1 (length split-name))
11299             (gnus-completing-read-with-default
11300              (car split-name) prom
11301              gnus-active-hashtb
11302              'gnus-valid-move-group-p
11303              nil nil
11304              'gnus-group-history))
11305            (t
11306             (gnus-completing-read-with-default
11307              nil prom
11308              (mapcar (lambda (el) (list el))
11309                      (nreverse split-name))
11310              nil nil nil
11311              'gnus-group-history))))
11312          (to-method (gnus-server-to-method (gnus-group-method to-newsgroup))))
11313     (when to-newsgroup
11314       (if (or (string= to-newsgroup "")
11315               (string= to-newsgroup prefix))
11316           (setq to-newsgroup default))
11317       (unless to-newsgroup
11318         (error "No group name entered"))
11319       (or (gnus-active to-newsgroup)
11320           (gnus-activate-group to-newsgroup nil nil to-method)
11321           (if (gnus-y-or-n-p (format "No such group: %s.  Create it? "
11322                                      to-newsgroup))
11323               (or (and (gnus-request-create-group to-newsgroup to-method)
11324                        (gnus-activate-group
11325                         to-newsgroup nil nil to-method)
11326                        (gnus-subscribe-group to-newsgroup))
11327                   (error "Couldn't create group %s" to-newsgroup)))
11328           (error "No such group: %s" to-newsgroup)))
11329     to-newsgroup))
11330
11331 (defun gnus-summary-save-parts (type dir n &optional reverse)
11332   "Save parts matching TYPE to DIR.
11333 If REVERSE, save parts that do not match TYPE."
11334   (interactive
11335    (list (read-string "Save parts of type: "
11336                       (or (car gnus-summary-save-parts-type-history)
11337                           gnus-summary-save-parts-default-mime)
11338                       'gnus-summary-save-parts-type-history)
11339          (setq gnus-summary-save-parts-last-directory
11340                (read-file-name "Save to directory: "
11341                                gnus-summary-save-parts-last-directory
11342                                nil t))
11343          current-prefix-arg))
11344   (gnus-summary-iterate n
11345     (let ((gnus-display-mime-function nil)
11346           (gnus-inhibit-treatment t))
11347       (gnus-summary-select-article))
11348     (save-excursion
11349       (set-buffer gnus-article-buffer)
11350       (let ((handles (or gnus-article-mime-handles
11351                          (mm-dissect-buffer nil gnus-article-loose-mime)
11352                          (and gnus-article-emulate-mime
11353                               (mm-uu-dissect)))))
11354         (when handles
11355           (gnus-summary-save-parts-1 type dir handles reverse)
11356           (unless gnus-article-mime-handles ;; Don't destroy this case.
11357             (mm-destroy-parts handles)))))))
11358
11359 (defun gnus-summary-save-parts-1 (type dir handle reverse)
11360   (if (stringp (car handle))
11361       (mapcar (lambda (h) (gnus-summary-save-parts-1 type dir h reverse))
11362               (cdr handle))
11363     (when (if reverse
11364               (not (string-match type (mm-handle-media-type handle)))
11365             (string-match type (mm-handle-media-type handle)))
11366       (let ((file (expand-file-name
11367                    (gnus-map-function
11368                     mm-file-name-rewrite-functions
11369                     (file-name-nondirectory
11370                      (or
11371                       (mail-content-type-get
11372                        (mm-handle-disposition handle) 'filename)
11373                       (mail-content-type-get
11374                        (mm-handle-type handle) 'name)
11375                       (concat gnus-newsgroup-name
11376                               "." (number-to-string
11377                                    (cdr gnus-article-current))))))
11378                    dir)))
11379         (unless (file-exists-p file)
11380           (mm-save-part-to-file handle file))))))
11381
11382 ;; Summary extract commands
11383
11384 (defun gnus-summary-insert-pseudos (pslist &optional not-view)
11385   (let ((buffer-read-only nil)
11386         (article (gnus-summary-article-number))
11387         after-article b e)
11388     (unless (gnus-summary-goto-subject article)
11389       (error "No such article: %d" article))
11390     (gnus-summary-position-point)
11391     ;; If all commands are to be bunched up on one line, we collect
11392     ;; them here.
11393     (unless gnus-view-pseudos-separately
11394       (let ((ps (setq pslist (sort pslist 'gnus-pseudos<)))
11395             files action)
11396         (while ps
11397           (setq action (cdr (assq 'action (car ps))))
11398           (setq files (list (cdr (assq 'name (car ps)))))
11399           (while (and ps (cdr ps)
11400                       (string= (or action "1")
11401                                (or (cdr (assq 'action (cadr ps))) "2")))
11402             (push (cdr (assq 'name (cadr ps))) files)
11403             (setcdr ps (cddr ps)))
11404           (when files
11405             (when (not (string-match "%s" action))
11406               (push " " files))
11407             (push " " files)
11408             (when (assq 'execute (car ps))
11409               (setcdr (assq 'execute (car ps))
11410                       (funcall (if (string-match "%s" action)
11411                                    'format 'concat)
11412                                action
11413                                (mapconcat
11414                                 (lambda (f)
11415                                   (if (equal f " ")
11416                                       f
11417                                     (mm-quote-arg f)))
11418                                 files " ")))))
11419           (setq ps (cdr ps)))))
11420     (if (and gnus-view-pseudos (not not-view))
11421         (while pslist
11422           (when (assq 'execute (car pslist))
11423             (gnus-execute-command (cdr (assq 'execute (car pslist)))
11424                                   (eq gnus-view-pseudos 'not-confirm)))
11425           (setq pslist (cdr pslist)))
11426       (save-excursion
11427         (while pslist
11428           (setq after-article (or (cdr (assq 'article (car pslist)))
11429                                   (gnus-summary-article-number)))
11430           (gnus-summary-goto-subject after-article)
11431           (forward-line 1)
11432           (setq b (point))
11433           (insert "    " (file-name-nondirectory
11434                           (cdr (assq 'name (car pslist))))
11435                   ": " (or (cdr (assq 'execute (car pslist))) "") "\n")
11436           (setq e (point))
11437           (forward-line -1)             ; back to `b'
11438           (gnus-add-text-properties
11439            b (1- e) (list 'gnus-number gnus-reffed-article-number
11440                           gnus-mouse-face-prop gnus-mouse-face))
11441           (gnus-data-enter
11442            after-article gnus-reffed-article-number
11443            gnus-unread-mark b (car pslist) 0 (- e b))
11444           (setq gnus-newsgroup-unreads
11445                 (gnus-add-to-sorted-list gnus-newsgroup-unreads
11446                                          gnus-reffed-article-number))
11447           (setq gnus-reffed-article-number (1- gnus-reffed-article-number))
11448           (setq pslist (cdr pslist)))))))
11449
11450 (defun gnus-pseudos< (p1 p2)
11451   (let ((c1 (cdr (assq 'action p1)))
11452         (c2 (cdr (assq 'action p2))))
11453     (and c1 c2 (string< c1 c2))))
11454
11455 (defun gnus-request-pseudo-article (props)
11456   (cond ((assq 'execute props)
11457          (gnus-execute-command (cdr (assq 'execute props)))))
11458   (let ((gnus-current-article (gnus-summary-article-number)))
11459     (gnus-run-hooks 'gnus-mark-article-hook)))
11460
11461 (defun gnus-execute-command (command &optional automatic)
11462   (save-excursion
11463     (gnus-article-setup-buffer)
11464     (set-buffer gnus-article-buffer)
11465     (setq buffer-read-only nil)
11466     (let ((command (if automatic command
11467                      (read-string "Command: " (cons command 0)))))
11468       (erase-buffer)
11469       (insert "$ " command "\n\n")
11470       (if gnus-view-pseudo-asynchronously
11471           (start-process "gnus-execute" (current-buffer) shell-file-name
11472                          shell-command-switch command)
11473         (call-process shell-file-name nil t nil
11474                       shell-command-switch command)))))
11475
11476 ;; Summary kill commands.
11477
11478 (defun gnus-summary-edit-global-kill (article)
11479   "Edit the \"global\" kill file."
11480   (interactive (list (gnus-summary-article-number)))
11481   (gnus-group-edit-global-kill article))
11482
11483 (defun gnus-summary-edit-local-kill ()
11484   "Edit a local kill file applied to the current newsgroup."
11485   (interactive)
11486   (setq gnus-current-headers (gnus-summary-article-header))
11487   (gnus-group-edit-local-kill
11488    (gnus-summary-article-number) gnus-newsgroup-name))
11489
11490 ;;; Header reading.
11491
11492 (defun gnus-read-header (id &optional header)
11493   "Read the headers of article ID and enter them into the Gnus system."
11494   (let ((group gnus-newsgroup-name)
11495         (gnus-override-method
11496          (or
11497           gnus-override-method
11498           (and (gnus-news-group-p gnus-newsgroup-name)
11499                (car (gnus-refer-article-methods)))))
11500         where)
11501     ;; First we check to see whether the header in question is already
11502     ;; fetched.
11503     (if (stringp id)
11504         ;; This is a Message-ID.
11505         (setq header (or header (gnus-id-to-header id)))
11506       ;; This is an article number.
11507       (setq header (or header (gnus-summary-article-header id))))
11508     (if (and header
11509              (not (gnus-summary-article-sparse-p (mail-header-number header))))
11510         ;; We have found the header.
11511         header
11512       ;; We have to really fetch the header to this article.
11513       (save-excursion
11514         (set-buffer nntp-server-buffer)
11515         (when (setq where (gnus-request-head id group))
11516           (nnheader-fold-continuation-lines)
11517           (goto-char (point-max))
11518           (insert ".\n")
11519           (goto-char (point-min))
11520           (insert "211 ")
11521           (princ (cond
11522                   ((numberp id) id)
11523                   ((cdr where) (cdr where))
11524                   (header (mail-header-number header))
11525                   (t gnus-reffed-article-number))
11526                  (current-buffer))
11527           (insert " Article retrieved.\n"))
11528         (if (or (not where)
11529                 (not (setq header (car (gnus-get-newsgroup-headers nil t)))))
11530             ()                          ; Malformed head.
11531           (unless (gnus-summary-article-sparse-p (mail-header-number header))
11532             (when (and (stringp id)
11533                        (not (string= (gnus-group-real-name group)
11534                                      (car where))))
11535               ;; If we fetched by Message-ID and the article came
11536               ;; from a different group, we fudge some bogus article
11537               ;; numbers for this article.
11538               (mail-header-set-number header gnus-reffed-article-number))
11539             (save-excursion
11540               (set-buffer gnus-summary-buffer)
11541               (decf gnus-reffed-article-number)
11542               (gnus-remove-header (mail-header-number header))
11543               (push header gnus-newsgroup-headers)
11544               (setq gnus-current-headers header)
11545               (push (mail-header-number header) gnus-newsgroup-limit)))
11546           header)))))
11547
11548 (defun gnus-remove-header (number)
11549   "Remove header NUMBER from `gnus-newsgroup-headers'."
11550   (if (and gnus-newsgroup-headers
11551            (= number (mail-header-number (car gnus-newsgroup-headers))))
11552       (pop gnus-newsgroup-headers)
11553     (let ((headers gnus-newsgroup-headers))
11554       (while (and (cdr headers)
11555                   (not (= number (mail-header-number (cadr headers)))))
11556         (pop headers))
11557       (when (cdr headers)
11558         (setcdr headers (cddr headers))))))
11559
11560 ;;;
11561 ;;; summary highlights
11562 ;;;
11563
11564 (defun gnus-highlight-selected-summary ()
11565   "Highlight selected article in summary buffer."
11566   ;; Added by Per Abrahamsen <amanda@iesd.auc.dk>.
11567   (when gnus-summary-selected-face
11568     (save-excursion
11569       (let* ((beg (gnus-point-at-bol))
11570              (end (gnus-point-at-eol))
11571              ;; Fix by Mike Dugan <dugan@bucrf16.bu.edu>.
11572              (from (if (get-text-property beg gnus-mouse-face-prop)
11573                        beg
11574                      (or (next-single-property-change
11575                           beg gnus-mouse-face-prop nil end)
11576                          beg)))
11577              (to
11578               (if (= from end)
11579                   (- from 2)
11580                 (or (next-single-property-change
11581                      from gnus-mouse-face-prop nil end)
11582                     end))))
11583         ;; If no mouse-face prop on line we will have to = from = end,
11584         ;; so we highlight the entire line instead.
11585         (when (= (+ to 2) from)
11586           (setq from beg)
11587           (setq to end))
11588         (if gnus-newsgroup-selected-overlay
11589             ;; Move old overlay.
11590             (gnus-move-overlay
11591              gnus-newsgroup-selected-overlay from to (current-buffer))
11592           ;; Create new overlay.
11593           (gnus-overlay-put
11594            (setq gnus-newsgroup-selected-overlay (gnus-make-overlay from to))
11595            'face gnus-summary-selected-face))))))
11596
11597 (defvar gnus-summary-highlight-line-cached nil)
11598 (defvar gnus-summary-highlight-line-trigger nil)
11599
11600 (defun gnus-summary-highlight-line-0 ()
11601   (if (and (eq gnus-summary-highlight-line-trigger
11602                gnus-summary-highlight)
11603            gnus-summary-highlight-line-cached)
11604       gnus-summary-highlight-line-cached
11605     (setq gnus-summary-highlight-line-trigger gnus-summary-highlight
11606           gnus-summary-highlight-line-cached
11607           (let* ((cond (list 'cond))
11608                  (c cond)
11609                  (list gnus-summary-highlight))
11610             (while list
11611               (setcdr c (cons (list (caar list) (list 'quote (cdar list)))
11612                               nil))
11613               (setq c (cdr c)
11614                     list (cdr list)))
11615             (gnus-byte-compile (list 'lambda nil cond))))))
11616
11617 (defun gnus-summary-highlight-line ()
11618   "Highlight current line according to `gnus-summary-highlight'."
11619   (let* ((beg (gnus-point-at-bol))
11620          (article (or (gnus-summary-article-number) gnus-current-article))
11621          (score (or (cdr (assq article
11622                                gnus-newsgroup-scored))
11623                     gnus-summary-default-score 0))
11624          (mark (or (gnus-summary-article-mark) gnus-unread-mark))
11625          (inhibit-read-only t)
11626          (default gnus-summary-default-score)
11627          (default-high gnus-summary-default-high-score)
11628          (default-low gnus-summary-default-low-score)
11629          (uncached (and gnus-summary-use-undownloaded-faces
11630                         (memq article gnus-newsgroup-undownloaded)
11631                         (not (memq article gnus-newsgroup-cached)))))
11632     (let ((face (funcall (gnus-summary-highlight-line-0))))
11633       (unless (eq face (get-text-property beg 'face))
11634         (gnus-put-text-property-excluding-characters-with-faces
11635          beg (gnus-point-at-eol) 'face
11636          (setq face (if (boundp face) (symbol-value face) face)))
11637         (when gnus-summary-highlight-line-function
11638           (funcall gnus-summary-highlight-line-function article face))))))
11639
11640 (defun gnus-update-read-articles (group unread &optional compute)
11641   "Update the list of read articles in GROUP.
11642 UNREAD is a sorted list."
11643   (let* ((active (or gnus-newsgroup-active (gnus-active group)))
11644          (entry (gnus-gethash group gnus-newsrc-hashtb))
11645          (info (nth 2 entry))
11646          (prev 1)
11647          read)
11648     (if (or (not info) (not active))
11649         ;; There is no info on this group if it was, in fact,
11650         ;; killed.  Gnus stores no information on killed groups, so
11651         ;; there's nothing to be done.
11652         ;; One could store the information somewhere temporarily,
11653         ;; perhaps...  Hmmm...
11654         ()
11655       ;; Remove any negative articles numbers.
11656       (while (and unread (< (car unread) 0))
11657         (setq unread (cdr unread)))
11658       ;; Remove any expired article numbers
11659       (while (and unread (< (car unread) (car active)))
11660         (setq unread (cdr unread)))
11661       ;; Compute the ranges of read articles by looking at the list of
11662       ;; unread articles.
11663       (while unread
11664         (when (/= (car unread) prev)
11665           (push (if (= prev (1- (car unread))) prev
11666                   (cons prev (1- (car unread))))
11667                 read))
11668         (setq prev (1+ (car unread)))
11669         (setq unread (cdr unread)))
11670       (when (<= prev (cdr active))
11671         (push (cons prev (cdr active)) read))
11672       (setq read (if (> (length read) 1) (nreverse read) read))
11673       (if compute
11674           read
11675         (save-excursion
11676           (let (setmarkundo)
11677             ;; Propagate the read marks to the backend.
11678             (when (gnus-check-backend-function 'request-set-mark group)
11679               (let ((del (gnus-remove-from-range (gnus-info-read info) read))
11680                     (add (gnus-remove-from-range read (gnus-info-read info))))
11681                 (when (or add del)
11682                   (unless (gnus-check-group group)
11683                     (error "Can't open server for %s" group))
11684                   (gnus-request-set-mark
11685                    group (delq nil (list (if add (list add 'add '(read)))
11686                                          (if del (list del 'del '(read))))))
11687                   (setq setmarkundo
11688                         `(gnus-request-set-mark
11689                           ,group
11690                           ',(delq nil (list
11691                                        (if del (list del 'add '(read)))
11692                                        (if add (list add 'del '(read))))))))))
11693             (set-buffer gnus-group-buffer)
11694             (gnus-undo-register
11695               `(progn
11696                  (gnus-info-set-marks ',info ',(gnus-info-marks info) t)
11697                  (gnus-info-set-read ',info ',(gnus-info-read info))
11698                  (gnus-get-unread-articles-in-group ',info
11699                                                     (gnus-active ,group))
11700                  (gnus-group-update-group ,group t)
11701                  ,setmarkundo))))
11702         ;; Enter this list into the group info.
11703         (gnus-info-set-read info read)
11704         ;; Set the number of unread articles in gnus-newsrc-hashtb.
11705         (gnus-get-unread-articles-in-group info (gnus-active group))
11706         t))))
11707
11708 (defun gnus-offer-save-summaries ()
11709   "Offer to save all active summary buffers."
11710   (let (buffers)
11711     ;; Go through all buffers and find all summaries.
11712     (dolist (buffer (buffer-list))
11713       (when (and (setq buffer (buffer-name buffer))
11714                  (string-match "Summary" buffer)
11715                  (save-excursion
11716                    (set-buffer buffer)
11717                    ;; We check that this is, indeed, a summary buffer.
11718                    (and (eq major-mode 'gnus-summary-mode)
11719                         ;; Also make sure this isn't bogus.
11720                         gnus-newsgroup-prepared
11721                         ;; Also make sure that this isn't a
11722                         ;; dead summary buffer.
11723                         (not gnus-dead-summary-mode))))
11724         (push buffer buffers)))
11725     ;; Go through all these summary buffers and offer to save them.
11726     (when buffers
11727       (save-excursion
11728         (map-y-or-n-p
11729          "Update summary buffer %s? "
11730          (lambda (buf)
11731            (switch-to-buffer buf)
11732            (gnus-summary-exit))
11733          buffers)))))
11734
11735 (defun gnus-summary-setup-default-charset ()
11736   "Setup newsgroup default charset."
11737   (if (member gnus-newsgroup-name '("nndraft:delayed" "nndraft:drafts"))
11738       (setq gnus-newsgroup-charset nil)
11739     (let* ((ignored-charsets
11740             (or gnus-newsgroup-ephemeral-ignored-charsets
11741                 (append
11742                  (and gnus-newsgroup-name
11743                       (gnus-parameter-ignored-charsets gnus-newsgroup-name))
11744                  gnus-newsgroup-ignored-charsets))))
11745       (setq gnus-newsgroup-charset
11746             (or gnus-newsgroup-ephemeral-charset
11747                 (and gnus-newsgroup-name
11748                      (gnus-parameter-charset gnus-newsgroup-name))
11749                 gnus-default-charset))
11750       (set (make-local-variable 'gnus-newsgroup-ignored-charsets)
11751            ignored-charsets))))
11752
11753 ;;;
11754 ;;; Mime Commands
11755 ;;;
11756
11757 (defun gnus-summary-display-buttonized (&optional show-all-parts)
11758   "Display the current article buffer fully MIME-buttonized.
11759 If SHOW-ALL-PARTS (the prefix) is non-nil, all multipart/* parts are
11760 treated as multipart/mixed."
11761   (interactive "P")
11762   (require 'gnus-art)
11763   (let ((gnus-unbuttonized-mime-types nil)
11764         (gnus-mime-display-multipart-as-mixed show-all-parts))
11765     (gnus-summary-show-article)))
11766
11767 (defun gnus-summary-repair-multipart (article)
11768   "Add a Content-Type header to a multipart article without one."
11769   (interactive (list (gnus-summary-article-number)))
11770   (gnus-with-article article
11771     (message-narrow-to-head)
11772     (message-remove-header "Mime-Version")
11773     (goto-char (point-max))
11774     (insert "Mime-Version: 1.0\n")
11775     (widen)
11776     (when (search-forward "\n--" nil t)
11777       (let ((separator (buffer-substring (point) (gnus-point-at-eol))))
11778         (message-narrow-to-head)
11779         (message-remove-header "Content-Type")
11780         (goto-char (point-max))
11781         (insert (format "Content-Type: multipart/mixed; boundary=\"%s\"\n"
11782                         separator))
11783         (widen))))
11784   (let (gnus-mark-article-hook)
11785     (gnus-summary-select-article t t nil article)))
11786
11787 (defun gnus-summary-toggle-display-buttonized ()
11788   "Toggle the buttonizing of the article buffer."
11789   (interactive)
11790   (require 'gnus-art)
11791   (if (setq gnus-inhibit-mime-unbuttonizing
11792             (not gnus-inhibit-mime-unbuttonizing))
11793       (let ((gnus-unbuttonized-mime-types nil))
11794         (gnus-summary-show-article))
11795     (gnus-summary-show-article)))
11796
11797 ;;;
11798 ;;; Generic summary marking commands
11799 ;;;
11800
11801 (defvar gnus-summary-marking-alist
11802   '((read gnus-del-mark "d")
11803     (unread gnus-unread-mark "u")
11804     (ticked gnus-ticked-mark "!")
11805     (dormant gnus-dormant-mark "?")
11806     (expirable gnus-expirable-mark "e"))
11807   "An alist of names/marks/keystrokes.")
11808
11809 (defvar gnus-summary-generic-mark-map (make-sparse-keymap))
11810 (defvar gnus-summary-mark-map)
11811
11812 (defun gnus-summary-make-all-marking-commands ()
11813   (define-key gnus-summary-mark-map "M" gnus-summary-generic-mark-map)
11814   (dolist (elem gnus-summary-marking-alist)
11815     (apply 'gnus-summary-make-marking-command elem)))
11816
11817 (defun gnus-summary-make-marking-command (name mark keystroke)
11818   (let ((map (make-sparse-keymap)))
11819     (define-key gnus-summary-generic-mark-map keystroke map)
11820     (dolist (lway `((next "next" next nil "n")
11821                     (next-unread "next unread" next t "N")
11822                     (prev "previous" prev nil "p")
11823                     (prev-unread "previous unread" prev t "P")
11824                     (nomove "" nil nil ,keystroke)))
11825       (let ((func (gnus-summary-make-marking-command-1
11826                    mark (car lway) lway name)))
11827         (setq func (eval func))
11828         (define-key map (nth 4 lway) func)))))
11829
11830 (defun gnus-summary-make-marking-command-1 (mark way lway name)
11831   `(defun ,(intern
11832             (format "gnus-summary-put-mark-as-%s%s"
11833                     name (if (eq way 'nomove)
11834                              ""
11835                            (concat "-" (symbol-name way)))))
11836      (n)
11837      ,(format
11838        "Mark the current article as %s%s.
11839 If N, the prefix, then repeat N times.
11840 If N is negative, move in reverse order.
11841 The difference between N and the actual number of articles marked is
11842 returned."
11843        name (cadr lway))
11844      (interactive "p")
11845      (gnus-summary-generic-mark n ,mark ',(nth 2 lway) ,(nth 3 lway))))
11846
11847 (defun gnus-summary-generic-mark (n mark move unread)
11848   "Mark N articles with MARK."
11849   (unless (eq major-mode 'gnus-summary-mode)
11850     (error "This command can only be used in the summary buffer"))
11851   (gnus-summary-show-thread)
11852   (let ((nummove
11853          (cond
11854           ((eq move 'next) 1)
11855           ((eq move 'prev) -1)
11856           (t 0))))
11857     (if (zerop nummove)
11858         (setq n 1)
11859       (when (< n 0)
11860         (setq n (abs n)
11861               nummove (* -1 nummove))))
11862     (while (and (> n 0)
11863                 (gnus-summary-mark-article nil mark)
11864                 (zerop (gnus-summary-next-subject nummove unread t)))
11865       (setq n (1- n)))
11866     (when (/= 0 n)
11867       (gnus-message 7 "No more %sarticles" (if mark "" "unread ")))
11868     (gnus-summary-recenter)
11869     (gnus-summary-position-point)
11870     (gnus-set-mode-line 'summary)
11871     n))
11872
11873 (defun gnus-summary-insert-articles (articles)
11874   (when (setq articles
11875               (gnus-sorted-difference articles
11876                                       (mapcar (lambda (h)
11877                                                 (mail-header-number h))
11878                                               gnus-newsgroup-headers)))
11879     (setq gnus-newsgroup-headers
11880           (gnus-merge 'list
11881                       gnus-newsgroup-headers
11882                       (gnus-fetch-headers articles)
11883                       'gnus-article-sort-by-number))
11884     ;; Suppress duplicates?
11885     (when gnus-suppress-duplicates
11886       (gnus-dup-suppress-articles))
11887
11888     ;; We might want to build some more threads first.
11889     (when (and gnus-fetch-old-headers
11890                (eq gnus-headers-retrieved-by 'nov))
11891       (if (eq gnus-fetch-old-headers 'invisible)
11892           (gnus-build-all-threads)
11893         (gnus-build-old-threads)))
11894     ;; Let the Gnus agent mark articles as read.
11895     (when gnus-agent
11896       (gnus-agent-get-undownloaded-list))
11897     ;; Remove list identifiers from subject
11898     (when gnus-list-identifiers
11899       (gnus-summary-remove-list-identifiers))
11900     ;; First and last article in this newsgroup.
11901     (when gnus-newsgroup-headers
11902       (setq gnus-newsgroup-begin
11903             (mail-header-number (car gnus-newsgroup-headers))
11904             gnus-newsgroup-end
11905             (mail-header-number
11906              (gnus-last-element gnus-newsgroup-headers))))
11907     (when gnus-use-scoring
11908       (gnus-possibly-score-headers))))
11909
11910 (defun gnus-summary-insert-old-articles (&optional all)
11911   "Insert all old articles in this group.
11912 If ALL is non-nil, already read articles become readable.
11913 If ALL is a number, fetch this number of articles."
11914   (interactive "P")
11915   (prog1
11916       (let ((old (sort (mapcar 'car gnus-newsgroup-data) '<))
11917             older len)
11918         (setq older
11919               ;; Some nntp servers lie about their active range.  When
11920               ;; this happens, the active range can be in the millions.
11921               ;; Use a compressed range to avoid creating a huge list.
11922               (gnus-range-difference (list gnus-newsgroup-active) old))
11923         (setq len (gnus-range-length older))
11924         (cond
11925          ((null older) nil)
11926          ((numberp all)
11927           (if (< all len)
11928               (let ((older-range (nreverse older)))
11929                 (setq older nil)
11930
11931                 (while (> all 0)
11932                   (let* ((r (pop older-range))
11933                          (min (if (numberp r) r (car r)))
11934                          (max (if (numberp r) r (cdr r))))
11935                     (while (and (<= min max)
11936                                 (> all 0))
11937                       (push max older)
11938                       (setq all (1- all)
11939                             max (1- max))))))
11940             (setq older (gnus-uncompress-range older))))
11941          (all
11942           (setq older (gnus-uncompress-range older)))
11943          (t
11944           (when (and (numberp gnus-large-newsgroup)
11945                    (> len gnus-large-newsgroup))
11946               (let* ((cursor-in-echo-area nil)
11947                      (initial (gnus-parameter-large-newsgroup-initial
11948                                gnus-newsgroup-name))
11949                      (input
11950                       (read-string
11951                        (format
11952                         "How many articles from %s (%s %d): "
11953                         (gnus-limit-string
11954                          (gnus-group-decoded-name gnus-newsgroup-name) 35)
11955                         (if initial "max" "default")
11956                         len)
11957                        (if initial
11958                            (cons (number-to-string initial)
11959                                  0)))))
11960                 (unless (string-match "^[ \t]*$" input)
11961                   (setq all (string-to-number input))
11962                   (if (< all len)
11963                       (let ((older-range (nreverse older)))
11964                         (setq older nil)
11965
11966                         (while (> all 0)
11967                           (let* ((r (pop older-range))
11968                                  (min (if (numberp r) r (car r)))
11969                                  (max (if (numberp r) r (cdr r))))
11970                             (while (and (<= min max)
11971                                         (> all 0))
11972                               (push max older)
11973                               (setq all (1- all)
11974                                     max (1- max))))))))))
11975           (setq older (gnus-uncompress-range older))))
11976         (if (not older)
11977             (message "No old news.")
11978           (gnus-summary-insert-articles older)
11979           (gnus-summary-limit (gnus-sorted-nunion old older))))
11980     (gnus-summary-position-point)))
11981
11982 (defun gnus-summary-insert-new-articles ()
11983   "Insert all new articles in this group."
11984   (interactive)
11985   (prog1
11986       (let ((old (sort (mapcar 'car gnus-newsgroup-data) '<))
11987             (old-active gnus-newsgroup-active)
11988             (nnmail-fetched-sources (list t))
11989             i new)
11990         (setq gnus-newsgroup-active
11991               (gnus-activate-group gnus-newsgroup-name 'scan))
11992         (setq i (cdr gnus-newsgroup-active))
11993         (while (> i (cdr old-active))
11994           (push i new)
11995           (decf i))
11996         (if (not new)
11997             (message "No gnus is bad news.")
11998           (gnus-summary-insert-articles new)
11999           (setq gnus-newsgroup-unreads
12000                 (gnus-sorted-nunion gnus-newsgroup-unreads new))
12001           (gnus-summary-limit (gnus-sorted-nunion old new))))
12002     (gnus-summary-position-point)))
12003
12004 (gnus-summary-make-all-marking-commands)
12005
12006 (gnus-ems-redefine)
12007
12008 (provide 'gnus-sum)
12009
12010 (run-hooks 'gnus-sum-load-hook)
12011
12012 ;; Local Variables:
12013 ;; coding: iso-8859-1
12014 ;; End:
12015
12016 ;; arch-tag: 17c6748f-6d00-4d36-bf01-835c42f31235
12017 ;;; gnus-sum.el ends here