lisp/gnus/gnus-msg.el

   1 ;;; gnus-msg.el --- mail and post interface for Gnus
   2
   3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   4 ;;   2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   5
   6 ;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
   7 ;;      Lars Magne Ingebrigtsen <larsi@gnus.org>
   8 ;; Keywords: news
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;;; Code:
  28
  29 (eval-when-compile (require 'cl))
  30
  31 (require 'gnus)
  32 (require 'gnus-ems)
  33 (require 'message)
  34 (require 'gnus-art)
  35 (require 'gnus-util)
  36
  37 (defcustom gnus-post-method 'current
  38   "*Preferred method for posting USENET news.
  39
  40 If this variable is `current' (which is the default), Gnus will use
  41 the \"current\" select method when posting.  If it is `native', Gnus
  42 will use the native select method when posting.
  43
  44 This method will not be used in mail groups and the like, only in
  45 \"real\" newsgroups.
  46
  47 If not `native' nor `current', the value must be a valid method as discussed
  48 in the documentation of `gnus-select-method'.  It can also be a list of
  49 methods.  If that is the case, the user will be queried for what select
  50 method to use when posting."
  51   :group 'gnus-group-foreign
  52   :link '(custom-manual "(gnus)Posting Server")
  53   :type `(choice (const native)
  54                  (const current)
  55                  (sexp :tag "Methods" ,gnus-select-method)))
  56
  57 (defcustom gnus-outgoing-message-group nil
  58   "All outgoing messages will be put in this group.
  59 If you want to store all your outgoing mail and articles in the group
  60 \"nnml:archive\", you set this variable to that value.  This variable
  61 can also be a list of group names.
  62
  63 If you want to have greater control over what group to put each
  64 message in, you can set this variable to a function that checks the
  65 current newsgroup name and then returns a suitable group name (or list
  66 of names)."
  67   :group 'gnus-message
  68   :type '(choice (const nil)
  69                  (function)
  70                  (string :tag "Group")
  71                  (repeat :tag "List of groups" (string :tag "Group"))))
  72
  73 (make-obsolete-variable 'gnus-outgoing-message-group 'gnus-message-archive-group "24.1")
  74
  75 (defcustom gnus-mailing-list-groups nil
  76   "*If non-nil a regexp matching groups that are really mailing lists.
  77 This is useful when you're reading a mailing list that has been
  78 gatewayed to a newsgroup, and you want to followup to an article in
  79 the group."
  80   :group 'gnus-message
  81   :type '(choice (regexp)
  82                  (const nil)))
  83
  84 (defcustom gnus-add-to-list nil
  85   "*If non-nil, add a `to-list' parameter automatically."
  86   :group 'gnus-message
  87   :type 'boolean)
  88
  89 (defcustom gnus-crosspost-complaint
  90   "Hi,
  91
  92 You posted the article below with the following Newsgroups header:
  93
  94 Newsgroups: %s
  95
  96 The %s group, at least, was an inappropriate recipient
  97 of this message.  Please trim your Newsgroups header to exclude this
  98 group before posting in the future.
  99
 100 Thank you.
 101
 102 "
 103   "Format string to be inserted when complaining about crossposts.
 104 The first %s will be replaced by the Newsgroups header;
 105 the second with the current group name."
 106   :group 'gnus-message
 107   :type 'string)
 108
 109 (defcustom gnus-message-setup-hook nil
 110   "Hook run after setting up a message buffer."
 111   :group 'gnus-message
 112   :options '(message-remove-blank-cited-lines)
 113   :type 'hook)
 114
 115 (defcustom gnus-bug-create-help-buffer t
 116   "*Should we create the *Gnus Help Bug* buffer?"
 117   :group 'gnus-message
 118   :type 'boolean)
 119
 120 (defcustom gnus-posting-styles nil
 121   "*Alist of styles to use when posting.
 122 See Info node `(gnus)Posting Styles'."
 123   :group 'gnus-message
 124   :link '(custom-manual "(gnus)Posting Styles")
 125   :type '(repeat (cons (choice (regexp)
 126                                (variable)
 127                                (list (const header)
 128                                      (string :tag "Header")
 129                                      (regexp :tag "Regexp"))
 130                                (function)
 131                                (sexp))
 132                        (repeat (list
 133                                 (choice (const signature)
 134                                         (const signature-file)
 135                                         (const organization)
 136                                         (const address)
 137                                         (const x-face-file)
 138                                         (const name)
 139                                         (const body)
 140                                         (symbol)
 141                                         (string :tag "Header"))
 142                                 (choice (string)
 143                                         (function)
 144                                         (variable)
 145                                         (sexp)))))))
 146
 147 (defcustom gnus-gcc-mark-as-read nil
 148   "If non-nil, automatically mark Gcc articles as read."
 149   :version "22.1"
 150   :group 'gnus-message
 151   :type 'boolean)
 152
 153 (make-obsolete-variable 'gnus-inews-mark-gcc-as-read
 154                         'gnus-gcc-mark-as-read "Emacs 22.1")
 155
 156 (defcustom gnus-gcc-externalize-attachments nil
 157   "Should local-file attachments be included as external parts in Gcc copies?
 158 If it is `all', attach files as external parts;
 159 if a regexp and matches the Gcc group name, attach files as external parts;
 160 if nil, attach files as normal parts."
 161   :version "22.1"
 162   :group 'gnus-message
 163   :type '(choice (const nil :tag "None")
 164                  (const all :tag "Any")
 165                  (string :tag "Regexp")))
 166
 167 (gnus-define-group-parameter
 168  posting-charset-alist
 169  :type list
 170  :function-document
 171  "Return the permitted unencoded charsets for posting of GROUP."
 172  :variable gnus-group-posting-charset-alist
 173  :variable-default
 174   '(("^\\(no\\|fr\\)\\.[^,]*\\(,[ \t\n]*\\(no\\|fr\\)\\.[^,]*\\)*$" iso-8859-1 (iso-8859-1))
 175     ("^\\(fido7\\|relcom\\)\\.[^,]*\\(,[ \t\n]*\\(fido7\\|relcom\\)\\.[^,]*\\)*$" koi8-r (koi8-r))
 176     (message-this-is-mail nil nil)
 177     (message-this-is-news nil t))
 178  :variable-document
 179   "Alist of regexps and permitted unencoded charsets for posting.
 180 Each element of the alist has the form (TEST HEADER BODY-LIST), where
 181 TEST is either a regular expression matching the newsgroup header or a
 182 variable to query,
 183 HEADER is the charset which may be left unencoded in the header (nil
 184 means encode all charsets),
 185 BODY-LIST is a list of charsets which may be encoded using 8bit
 186 content-transfer encoding in the body, or one of the special values
 187 nil (always encode using quoted-printable) or t (always use 8bit).
 188
 189 Note that any value other than nil for HEADER infringes some RFCs, so
 190 use this option with care."
 191  :variable-group gnus-charset
 192  :variable-type
 193  '(repeat (list :tag "Permitted unencoded charsets"
 194                 (choice :tag "Where"
 195                         (regexp :tag "Group")
 196                         (const :tag "Mail message" :value message-this-is-mail)
 197                         (const :tag "News article" :value message-this-is-news))
 198                 (choice :tag "Header"
 199                         (const :tag "None" nil)
 200                         (symbol :tag "Charset"))
 201                 (choice :tag "Body"
 202                         (const :tag "Any" :value t)
 203                         (const :tag "None" :value nil)
 204                         (repeat :tag "Charsets"
 205                                 (symbol :tag "Charset")))))
 206  :parameter-type '(choice :tag "Permitted unencoded charsets"
 207                           :value nil
 208                           (repeat (symbol)))
 209  :parameter-document       "\
 210 List of charsets that are permitted to be unencoded.")
 211
 212 (defcustom gnus-debug-files
 213   '("gnus.el" "gnus-sum.el" "gnus-group.el"
 214     "gnus-art.el" "gnus-start.el" "gnus-async.el"
 215     "gnus-msg.el" "gnus-score.el" "gnus-win.el" "gnus-topic.el"
 216     "gnus-agent.el" "gnus-cache.el" "gnus-srvr.el"
 217     "mm-util.el" "mm-decode.el" "nnmail.el" "message.el")
 218   "Files whose variables will be reported in `gnus-bug'."
 219   :version "22.1"
 220   :group 'gnus-message
 221   :type '(repeat (string :tag "File")))
 222
 223 (defcustom gnus-debug-exclude-variables
 224   '(mm-mime-mule-charset-alist
 225     nnmail-split-fancy message-minibuffer-local-map)
 226   "Variables that should not be reported in `gnus-bug'."
 227   :version "22.1"
 228   :group 'gnus-message
 229   :type '(repeat (symbol :tag "Variable")))
 230
 231 (defcustom gnus-discouraged-post-methods
 232   '(nndraft nnml nnimap nnmaildir nnmh nnfolder nndir)
 233   "A list of back ends that are not used in \"real\" newsgroups.
 234 This variable is used only when `gnus-post-method' is `current'."
 235   :version "22.1"
 236   :group 'gnus-group-foreign
 237   :type '(repeat (symbol :tag "Back end")))
 238
 239 (defcustom gnus-message-replysign
 240   nil
 241   "Automatically sign replies to signed messages.
 242 See also the `mml-default-sign-method' variable."
 243   :group 'gnus-message
 244   :type 'boolean)
 245
 246 (defcustom gnus-message-replyencrypt
 247   nil
 248   "Automatically encrypt replies to encrypted messages.
 249 See also the `mml-default-encrypt-method' variable."
 250   :group 'gnus-message
 251   :type 'boolean)
 252
 253 (defcustom gnus-message-replysignencrypted
 254   t
 255   "Setting this causes automatically encrypted messages to also be signed."
 256   :group 'gnus-message
 257   :type 'boolean)
 258
 259 (defcustom gnus-confirm-mail-reply-to-news (and gnus-novice-user
 260                                                 (not gnus-expert-user))
 261   "If non-nil, Gnus requests confirmation when replying to news.
 262 This is done because new users often reply by mistake when reading
 263 news.
 264 This can also be a function receiving the group name as the only
 265 parameter, which should return non-nil if a confirmation is needed; or
 266 a regexp, in which case a confirmation is asked for if the group name
 267 matches the regexp."
 268   :version "23.1" ;; No Gnus (default changed)
 269   :group 'gnus-message
 270   :type '(choice (const :tag "No" nil)
 271                  (const :tag "Yes" t)
 272                  (regexp :tag "If group matches regexp")
 273                  (function :tag "If function evaluates to non-nil")))
 274
 275 (defcustom gnus-confirm-treat-mail-like-news
 276   nil
 277   "If non-nil, Gnus will treat mail like news with regard to confirmation
 278 when replying by mail.  See the `gnus-confirm-mail-reply-to-news' variable
 279 for fine-tuning this.
 280 If nil, Gnus will never ask for confirmation if replying to mail."
 281   :version "22.1"
 282   :group 'gnus-message
 283   :type 'boolean)
 284
 285 (defcustom gnus-summary-resend-default-address t
 286   "If non-nil, Gnus tries to suggest a default address to resend to.
 287 If nil, the address field will always be empty after invoking
 288 `gnus-summary-resend-message'."
 289   :version "22.1"
 290   :group 'gnus-message
 291   :type 'boolean)
 292
 293 (defcustom gnus-message-highlight-citation
 294   t ;; gnus-treat-highlight-citation ;; gnus-cite dependency
 295   "Enable highlighting of different citation levels in message-mode."
 296   :version "23.1" ;; No Gnus
 297   :group 'gnus-cite
 298   :group 'gnus-message
 299   :type 'boolean)
 300
 301 (autoload 'gnus-message-citation-mode "gnus-cite" nil t)
 302
 303 ;;; Internal variables.
 304
 305 (defvar gnus-inhibit-posting-styles nil
 306   "Inhibit the use of posting styles.")
 307
 308 (defvar gnus-article-yanked-articles nil)
 309 (defvar gnus-message-buffer "*Mail Gnus*")
 310 (defvar gnus-article-copy nil)
 311 (defvar gnus-check-before-posting nil)
 312 (defvar gnus-last-posting-server nil)
 313 (defvar gnus-message-group-art nil)
 314
 315 (defvar gnus-msg-force-broken-reply-to nil)
 316
 317 (defconst gnus-bug-message
 318   "Sending a bug report to the Gnus Towers.
 319 ========================================
 320
 321 The buffer below is a mail buffer.  When you press `C-c C-c', it will
 322 be sent to the Gnus Bug Exterminators.
 323
 324 The thing near the bottom of the buffer is how the environment
 325 settings will be included in the mail.  Please do not delete that.
 326 They will tell the Bug People what your environment is, so that it
 327 will be easier to locate the bugs.
 328
 329 If you have found a bug that makes Emacs go \"beep\", set
 330 debug-on-error to t (`M-x set-variable RET debug-on-error RET t RET')
 331 and include the backtrace in your bug report.
 332
 333 Please describe the bug in annoying, painstaking detail.
 334
 335 Thank you for your help in stamping out bugs.
 336 ")
 337
 338 (autoload 'gnus-uu-post-news "gnus-uu" nil t)
 339
 340 \f
 341 ;;;
 342 ;;; Gnus Posting Functions
 343 ;;;
 344
 345 (gnus-define-keys (gnus-summary-send-map "S" gnus-summary-mode-map)
 346   "p" gnus-summary-post-news
 347   "i" gnus-summary-news-other-window
 348   "f" gnus-summary-followup
 349   "F" gnus-summary-followup-with-original
 350   "c" gnus-summary-cancel-article
 351   "s" gnus-summary-supersede-article
 352   "r" gnus-summary-reply
 353   "y" gnus-summary-yank-message
 354   "R" gnus-summary-reply-with-original
 355   "w" gnus-summary-wide-reply
 356   "W" gnus-summary-wide-reply-with-original
 357   "v" gnus-summary-very-wide-reply
 358   "V" gnus-summary-very-wide-reply-with-original
 359   "n" gnus-summary-followup-to-mail
 360   "N" gnus-summary-followup-to-mail-with-original
 361   "m" gnus-summary-mail-other-window
 362   "u" gnus-uu-post-news
 363   "\M-c" gnus-summary-mail-crosspost-complaint
 364   "Br" gnus-summary-reply-broken-reply-to
 365   "BR" gnus-summary-reply-broken-reply-to-with-original
 366   "om" gnus-summary-mail-forward
 367   "op" gnus-summary-post-forward
 368   "Om" gnus-uu-digest-mail-forward
 369   "Op" gnus-uu-digest-post-forward)
 370
 371 (gnus-define-keys (gnus-send-bounce-map "D" gnus-summary-send-map)
 372   "b" gnus-summary-resend-bounced-mail
 373   ;; "c" gnus-summary-send-draft
 374   "r" gnus-summary-resend-message
 375   "e" gnus-summary-resend-message-edit)
 376
 377 ;;; Internal functions.
 378
 379 (defun gnus-inews-make-draft (articles)
 380   `(lambda ()
 381      (gnus-inews-make-draft-meta-information
 382       ,(gnus-group-decoded-name gnus-newsgroup-name) ',articles)))
 383
 384 (defvar gnus-article-reply nil)
 385 (defmacro gnus-setup-message (config &rest forms)
 386   (let ((winconf (make-symbol "gnus-setup-message-winconf"))
 387         (buffer (make-symbol "gnus-setup-message-buffer"))
 388         (article (make-symbol "gnus-setup-message-article"))
 389         (yanked (make-symbol "gnus-setup-yanked-articles"))
 390         (group (make-symbol "gnus-setup-message-group")))
 391     `(let ((,winconf (current-window-configuration))
 392            (,buffer (buffer-name (current-buffer)))
 393            (,article gnus-article-reply)
 394            (,yanked gnus-article-yanked-articles)
 395            (,group gnus-newsgroup-name)
 396            (message-header-setup-hook
 397             (copy-sequence message-header-setup-hook))
 398            (mbl mml-buffer-list)
 399            (message-mode-hook (copy-sequence message-mode-hook)))
 400        (setq mml-buffer-list nil)
 401        (add-hook 'message-header-setup-hook 'gnus-inews-insert-gcc)
 402        ;; message-newsreader and message-mailer were formerly set in
 403        ;; gnus-inews-add-send-actions, but this is too late when
 404        ;; message-generate-headers-first is used. --ansel
 405        (add-hook 'message-mode-hook
 406                  (lambda nil
 407                    (setq message-newsreader
 408                          (setq message-mailer (gnus-extended-version)))))
 409        ;; #### FIXME: for a reason that I did not manage to identify yet,
 410        ;; the variable `gnus-newsgroup-name' does not honor a dynamically
 411        ;; scoped or setq'ed value from a caller like `C-u gnus-summary-mail'.
 412        ;; After evaluation of @forms below, it gets the value we actually want
 413        ;; to override, and the posting styles are used. For that reason, I've
 414        ;; added an optional argument to `gnus-configure-posting-styles' to
 415        ;; make sure that the correct value for the group name is used. -- drv
 416        (add-hook 'message-mode-hook
 417                  (if (memq ,config '(reply-yank reply))
 418                      (lambda ()
 419                        (gnus-configure-posting-styles ,group))
 420                    (lambda ()
 421                      ;; There may be an old " *gnus article copy*" buffer.
 422                      (let (gnus-article-copy)
 423                        (gnus-configure-posting-styles ,group)))))
 424        (gnus-alist-pull ',(intern gnus-draft-meta-information-header)
 425                   message-required-headers)
 426        (when (and ,group
 427                   (not (string= ,group "")))
 428          (push (cons
 429                 (intern gnus-draft-meta-information-header)
 430                 (gnus-inews-make-draft (or ,yanked ,article)))
 431                message-required-headers))
 432        (unwind-protect
 433            (progn
 434              ,@forms)
 435          (gnus-inews-add-send-actions ,winconf ,buffer ,article ,config
 436                                       ,yanked)
 437          (setq gnus-message-buffer (current-buffer))
 438          (set (make-local-variable 'gnus-message-group-art)
 439               (cons ,group ,article))
 440          (set (make-local-variable 'gnus-newsgroup-name) ,group)
 441          ;; Enable highlighting of different citation levels
 442          (when gnus-message-highlight-citation
 443            (gnus-message-citation-mode 1))
 444          (gnus-run-hooks 'gnus-message-setup-hook)
 445          (if (eq major-mode 'message-mode)
 446              (let ((mbl1 mml-buffer-list))
 447                (setq mml-buffer-list mbl)  ;; Global value
 448                (set (make-local-variable 'mml-buffer-list) mbl1);; Local value
 449                (gnus-make-local-hook 'kill-buffer-hook)
 450                (gnus-make-local-hook 'change-major-mode-hook)
 451                (add-hook 'change-major-mode-hook 'mml-destroy-buffers nil t)
 452                (add-hook 'kill-buffer-hook 'mml-destroy-buffers t t))
 453            (mml-destroy-buffers)
 454            (setq mml-buffer-list mbl)))
 455        (message-hide-headers)
 456        (gnus-add-buffer)
 457        (gnus-configure-windows ,config t)
 458        (run-hooks 'post-command-hook)
 459        (set-buffer-modified-p nil))))
 460
 461 (defun gnus-inews-make-draft-meta-information (group articles)
 462   (when (numberp articles)
 463     (setq articles (list articles)))
 464   (concat "(\"" group "\""
 465           (if articles
 466               (concat " "
 467                       (mapconcat
 468                        (lambda (elem)
 469                          (number-to-string
 470                           (if (consp elem)
 471                               (car elem)
 472                             elem)))
 473                        articles " "))
 474             "")
 475           ")"))
 476
 477 ;;;###autoload
 478 (defun gnus-msg-mail (&optional to subject other-headers continue
 479                                 switch-action yank-action send-actions)
 480   "Start editing a mail message to be sent.
 481 Like `message-mail', but with Gnus paraphernalia, particularly the
 482 Gcc: header for archiving purposes."
 483   (interactive)
 484   (let ((buf (current-buffer))
 485         mail-buf)
 486     (gnus-setup-message 'message
 487       (message-mail to subject other-headers continue
 488                     nil yank-action send-actions))
 489     (when switch-action
 490       (setq mail-buf (current-buffer))
 491       (switch-to-buffer buf)
 492       (apply switch-action mail-buf nil)))
 493   ;; COMPOSEFUNC should return t if succeed.  Undocumented ???
 494   t)
 495
 496 ;;;###autoload
 497 (defun gnus-button-mailto (address)
 498   "Mail to ADDRESS."
 499   (set-buffer (gnus-copy-article-buffer))
 500   (gnus-setup-message 'message
 501     (message-reply address)))
 502
 503 ;;;###autoload
 504 (defun gnus-button-reply (&optional to-address wide)
 505   "Like `message-reply'."
 506   (interactive)
 507   (gnus-setup-message 'message
 508     (message-reply to-address wide)))
 509
 510 ;;;###autoload
 511 (define-mail-user-agent 'gnus-user-agent
 512   'gnus-msg-mail 'message-send-and-exit
 513   'message-kill-buffer 'message-send-hook)
 514
 515 (defun gnus-setup-posting-charset (group)
 516   (let ((alist gnus-group-posting-charset-alist)
 517         (group (or group ""))
 518         elem)
 519     (when group
 520       (catch 'found
 521         (while (setq elem (pop alist))
 522           (when (or (and (stringp (car elem))
 523                          (string-match (car elem) group))
 524                     (and (functionp (car elem))
 525                          (funcall (car elem) group))
 526                     (and (symbolp (car elem))
 527                          (symbol-value (car elem))))
 528             (throw 'found (cons (cadr elem) (caddr elem)))))))))
 529
 530 (defun gnus-inews-add-send-actions (winconf buffer article
 531                                             &optional config yanked)
 532   (gnus-make-local-hook 'message-sent-hook)
 533   (add-hook 'message-sent-hook (if gnus-agent 'gnus-agent-possibly-do-gcc
 534                                  'gnus-inews-do-gcc) nil t)
 535   (when gnus-agent
 536     (gnus-make-local-hook 'message-header-hook)
 537     (add-hook 'message-header-hook 'gnus-agent-possibly-save-gcc nil t))
 538   (setq message-post-method
 539         `(lambda (&optional arg)
 540            (gnus-post-method arg ,gnus-newsgroup-name)))
 541   (message-add-action
 542    `(when (gnus-buffer-exists-p ,buffer)
 543       (set-window-configuration ,winconf))
 544    'exit 'postpone 'kill)
 545   (let ((to-be-marked (cond
 546                        (yanked
 547                         (mapcar
 548                          (lambda (x) (if (listp x) (car x) x)) yanked))
 549                        (article (if (listp article) article (list article)))
 550                        (t nil))))
 551     (message-add-action
 552      `(when (gnus-buffer-exists-p ,buffer)
 553         (with-current-buffer ,buffer
 554           ,(when to-be-marked
 555              (if (eq config 'forward)
 556                  `(gnus-summary-mark-article-as-forwarded ',to-be-marked)
 557                `(gnus-summary-mark-article-as-replied ',to-be-marked)))))
 558      'send)))
 559
 560 (put 'gnus-setup-message 'lisp-indent-function 1)
 561 (put 'gnus-setup-message 'edebug-form-spec '(form body))
 562
 563 ;;; Post news commands of Gnus group mode and summary mode
 564
 565 (defun gnus-group-mail (&optional arg)
 566   "Start composing a mail.
 567 If ARG, use the group under the point to find a posting style.
 568 If ARG is 1, prompt for a group name to find the posting style."
 569   (interactive "P")
 570   ;; We can't `let' gnus-newsgroup-name here, since that leads
 571   ;; to local variables leaking.
 572   (let ((group gnus-newsgroup-name)
 573         ;; make sure last viewed article doesn't affect posting styles:
 574         (gnus-article-copy)
 575         (buffer (current-buffer)))
 576     (unwind-protect
 577         (progn
 578           (setq gnus-newsgroup-name
 579                 (if arg
 580                     (if (= 1 (prefix-numeric-value arg))
 581                         (gnus-group-completing-read
 582                          "Use posting style of group"
 583                          nil (gnus-read-active-file-p))
 584                       (gnus-group-group-name))
 585                   ""))
 586           ;; #### see comment in gnus-setup-message -- drv
 587           (gnus-setup-message 'message (message-mail)))
 588       (with-current-buffer buffer
 589         (setq gnus-newsgroup-name group)))))
 590
 591 (defun gnus-group-news (&optional arg)
 592   "Start composing a news.
 593 If ARG, post to group under point.
 594 If ARG is 1, prompt for group name to post to.
 595
 596 This function prepares a news even when using mail groups.  This is useful
 597 for posting messages to mail groups without actually sending them over the
 598 network.  The corresponding back end must have a 'request-post method."
 599   (interactive "P")
 600   ;; We can't `let' gnus-newsgroup-name here, since that leads
 601   ;; to local variables leaking.
 602   (let ((group gnus-newsgroup-name)
 603         ;; make sure last viewed article doesn't affect posting styles:
 604         (gnus-article-copy)
 605         (buffer (current-buffer)))
 606     (unwind-protect
 607         (progn
 608           (setq gnus-newsgroup-name
 609                 (if arg
 610                     (if (= 1 (prefix-numeric-value arg))
 611                         (gnus-group-completing-read "Use group"
 612                                                     nil
 613                                                     (gnus-read-active-file-p))
 614                       (gnus-group-group-name))
 615                   ""))
 616           ;; #### see comment in gnus-setup-message -- drv
 617           (gnus-setup-message 'message
 618             (message-news (gnus-group-real-name gnus-newsgroup-name))))
 619       (with-current-buffer buffer
 620         (setq gnus-newsgroup-name group)))))
 621
 622 (defun gnus-group-post-news (&optional arg)
 623   "Start composing a message (a news by default).
 624 If ARG, post to group under point.  If ARG is 1, prompt for group name.
 625 Depending on the selected group, the message might be either a mail or
 626 a news."
 627   (interactive "P")
 628   ;; Bind this variable here to make message mode hooks work ok.
 629   (let ((gnus-newsgroup-name
 630          (if arg
 631              (if (= 1 (prefix-numeric-value arg))
 632                  (gnus-group-completing-read "Newsgroup" nil
 633                                              (gnus-read-active-file-p))
 634                (gnus-group-group-name))
 635            ""))
 636         ;; make sure last viewed article doesn't affect posting styles:
 637         (gnus-article-copy))
 638     (gnus-post-news 'post gnus-newsgroup-name nil nil nil nil
 639                     (string= gnus-newsgroup-name ""))))
 640
 641 (defun gnus-summary-mail-other-window (&optional arg)
 642   "Start composing a mail in another window.
 643 Use the posting of the current group by default.
 644 If ARG, don't do that.  If ARG is 1, prompt for group name to find the
 645 posting style."
 646   (interactive "P")
 647   ;; We can't `let' gnus-newsgroup-name here, since that leads
 648   ;; to local variables leaking.
 649   (let ((group gnus-newsgroup-name)
 650         ;; make sure last viewed article doesn't affect posting styles:
 651         (gnus-article-copy)
 652         (buffer (current-buffer)))
 653     (unwind-protect
 654         (progn
 655           (setq gnus-newsgroup-name
 656                 (if arg
 657                     (if (= 1 (prefix-numeric-value arg))
 658                         (gnus-group-completing-read "Use group"
 659                                                     nil
 660                                                     (gnus-read-active-file-p))
 661                       "")
 662                   gnus-newsgroup-name))
 663           ;; #### see comment in gnus-setup-message -- drv
 664           (gnus-setup-message 'message (message-mail)))
 665       (with-current-buffer buffer
 666         (setq gnus-newsgroup-name group)))))
 667
 668 (defun gnus-summary-news-other-window (&optional arg)
 669   "Start composing a news in another window.
 670 Post to the current group by default.
 671 If ARG, don't do that.  If ARG is 1, prompt for group name to post to.
 672
 673 This function prepares a news even when using mail groups.  This is useful
 674 for posting messages to mail groups without actually sending them over the
 675 network.  The corresponding back end must have a 'request-post method."
 676   (interactive "P")
 677   ;; We can't `let' gnus-newsgroup-name here, since that leads
 678   ;; to local variables leaking.
 679   (let ((group gnus-newsgroup-name)
 680         ;; make sure last viewed article doesn't affect posting styles:
 681         (gnus-article-copy)
 682         (buffer (current-buffer)))
 683     (unwind-protect
 684         (progn
 685           (setq gnus-newsgroup-name
 686                 (if arg
 687                     (if (= 1 (prefix-numeric-value arg))
 688                         (gnus-group-completing-read "Use group"
 689                                                     nil
 690                                                     (gnus-read-active-file-p))
 691                       "")
 692                   gnus-newsgroup-name))
 693           ;; #### see comment in gnus-setup-message -- drv
 694           (gnus-setup-message 'message
 695             (progn
 696               (message-news (gnus-group-real-name gnus-newsgroup-name))
 697               (set (make-local-variable 'gnus-discouraged-post-methods)
 698                    (remove
 699                     (car (gnus-find-method-for-group gnus-newsgroup-name))
 700                     gnus-discouraged-post-methods)))))
 701       (with-current-buffer buffer
 702         (setq gnus-newsgroup-name group)))))
 703
 704 (defun gnus-summary-post-news (&optional arg)
 705   "Start composing a message.  Post to the current group by default.
 706 If ARG, don't do that.  If ARG is 1, prompt for a group name to post to.
 707 Depending on the selected group, the message might be either a mail or
 708 a news."
 709   (interactive "P")
 710   ;; Bind this variable here to make message mode hooks work ok.
 711   (let ((gnus-newsgroup-name
 712          (if arg
 713              (if (= 1 (prefix-numeric-value arg))
 714                  (gnus-group-completing-read "Newsgroup" nil
 715                                              (gnus-read-active-file-p))
 716                "")
 717            gnus-newsgroup-name))
 718         ;; make sure last viewed article doesn't affect posting styles:
 719         (gnus-article-copy))
 720     (gnus-post-news 'post gnus-newsgroup-name)))
 721
 722
 723 (defun gnus-summary-followup (yank &optional force-news)
 724   "Compose a followup to an article.
 725 If prefix argument YANK is non-nil, the original article is yanked
 726 automatically.
 727 YANK is a list of elements, where the car of each element is the
 728 article number, and the cdr is the string to be yanked."
 729   (interactive
 730    (list (and current-prefix-arg
 731               (gnus-summary-work-articles 1))))
 732   (when yank
 733     (gnus-summary-goto-subject
 734      (if (listp (car yank))
 735          (caar yank)
 736        (car yank))))
 737   (save-window-excursion
 738     (gnus-summary-select-article))
 739   (let ((headers (gnus-summary-article-header (gnus-summary-article-number)))
 740         (gnus-newsgroup-name gnus-newsgroup-name))
 741     ;; Send a followup.
 742     (gnus-post-news nil gnus-newsgroup-name
 743                     headers gnus-article-buffer
 744                     yank nil force-news)
 745     (gnus-summary-handle-replysign)))
 746
 747 (defun gnus-summary-followup-with-original (n &optional force-news)
 748   "Compose a followup to an article and include the original article.
 749 The text in the region will be yanked.  If the region isn't
 750 active, the entire article will be yanked."
 751   (interactive "P")
 752   (gnus-summary-followup (gnus-summary-work-articles n) force-news))
 753
 754 (defun gnus-summary-followup-to-mail (&optional arg)
 755   "Followup to the current mail message via news."
 756   (interactive
 757    (list (and current-prefix-arg
 758               (gnus-summary-work-articles 1))))
 759   (gnus-summary-followup arg t))
 760
 761 (defun gnus-summary-followup-to-mail-with-original (&optional arg)
 762   "Followup to the current mail message via news."
 763   (interactive "P")
 764   (gnus-summary-followup (gnus-summary-work-articles arg) t))
 765
 766 (defun gnus-inews-yank-articles (articles)
 767   (let (beg article yank-string)
 768     (message-goto-body)
 769     (while (setq article (pop articles))
 770       (when (listp article)
 771         (setq yank-string (nth 1 article)
 772               article (nth 0 article)))
 773       (save-window-excursion
 774         (set-buffer gnus-summary-buffer)
 775         (gnus-summary-select-article nil nil nil article)
 776         (gnus-summary-remove-process-mark article))
 777       (gnus-copy-article-buffer nil yank-string)
 778       (let ((message-reply-buffer gnus-article-copy)
 779             (message-reply-headers
 780              ;; The headers are decoded.
 781              (with-current-buffer gnus-article-copy
 782                (save-restriction
 783                  (nnheader-narrow-to-headers)
 784                  (nnheader-parse-naked-head)))))
 785         (message-yank-original)
 786         (message-exchange-point-and-mark)
 787         (setq beg (or beg (mark t))))
 788       (when articles
 789         (insert "\n")))
 790     (push-mark)
 791     (goto-char beg)))
 792
 793 (defun gnus-summary-cancel-article (&optional n symp)
 794   "Cancel an article you posted.
 795 Uses the process-prefix convention.  If given the symbolic
 796 prefix `a', cancel using the standard posting method; if not
 797 post using the current select method."
 798   (interactive (gnus-interactive "P\ny"))
 799   (let ((message-post-method
 800          `(lambda (arg)
 801             (gnus-post-method (eq ',symp 'a) ,gnus-newsgroup-name))))
 802     (dolist (article (gnus-summary-work-articles n))
 803       (when (gnus-summary-select-article t nil nil article)
 804         (when (gnus-eval-in-buffer-window gnus-original-article-buffer
 805                 (message-cancel-news))
 806           (gnus-summary-mark-as-read article gnus-canceled-mark)
 807           (gnus-cache-remove-article 1))
 808         (gnus-article-hide-headers-if-wanted))
 809       (gnus-summary-remove-process-mark article))))
 810
 811 (defun gnus-summary-supersede-article ()
 812   "Compose an article that will supersede a previous article.
 813 This is done simply by taking the old article and adding a Supersedes
 814 header line with the old Message-ID."
 815   (interactive)
 816   (let ((article (gnus-summary-article-number))
 817         (mail-parse-charset gnus-newsgroup-charset))
 818     (gnus-setup-message 'reply-yank
 819       (gnus-summary-select-article t)
 820       (set-buffer gnus-original-article-buffer)
 821       (message-supersede)
 822       (push
 823        `((lambda ()
 824            (when (gnus-buffer-exists-p ,gnus-summary-buffer)
 825              (with-current-buffer ,gnus-summary-buffer
 826                (gnus-cache-possibly-remove-article ,article nil nil nil t)
 827                (gnus-summary-mark-as-read ,article gnus-canceled-mark)))))
 828        message-send-actions)
 829       ;; Add Gcc header.
 830       (gnus-inews-insert-gcc))))
 831
 832 \f
 833
 834 (defun gnus-copy-article-buffer (&optional article-buffer yank-string)
 835   ;; make a copy of the article buffer with all text properties removed
 836   ;; this copy is in the buffer gnus-article-copy.
 837   ;; if ARTICLE-BUFFER is nil, gnus-article-buffer is used
 838   ;; this buffer should be passed to all mail/news reply/post routines.
 839   (setq gnus-article-copy (gnus-get-buffer-create " *gnus article copy*"))
 840   (with-current-buffer gnus-article-copy
 841     (mm-enable-multibyte))
 842   (let ((article-buffer (or article-buffer gnus-article-buffer))
 843         end beg)
 844     (if (not (and (get-buffer article-buffer)
 845                   (gnus-buffer-exists-p article-buffer)))
 846         (error "Can't find any article buffer")
 847       (with-current-buffer article-buffer
 848         (let ((gnus-newsgroup-charset (or gnus-article-charset
 849                                           gnus-newsgroup-charset))
 850               (gnus-newsgroup-ignored-charsets
 851                (or gnus-article-ignored-charsets
 852                    gnus-newsgroup-ignored-charsets)))
 853           (save-restriction
 854             ;; Copy over the (displayed) article buffer, delete
 855             ;; hidden text and remove text properties.
 856             (widen)
 857             (copy-to-buffer gnus-article-copy (point-min) (point-max))
 858             (set-buffer gnus-article-copy)
 859             (when yank-string
 860               (message-goto-body)
 861               (delete-region (point) (point-max))
 862               (insert yank-string))
 863             (gnus-article-delete-text-of-type 'annotation)
 864             (gnus-article-delete-text-of-type 'multipart)
 865             (gnus-remove-text-with-property 'gnus-prev)
 866             (gnus-remove-text-with-property 'gnus-next)
 867             (gnus-remove-text-with-property 'gnus-decoration)
 868             (insert
 869              (prog1
 870                  (buffer-substring-no-properties (point-min) (point-max))
 871                (erase-buffer)))
 872             ;; Find the original headers.
 873             (set-buffer gnus-original-article-buffer)
 874             (goto-char (point-min))
 875             (while (looking-at message-unix-mail-delimiter)
 876               (forward-line 1))
 877             (let ((mail-header-separator ""))
 878               (setq beg (point)
 879                     end (or (message-goto-body)
 880                             ;; There may be just a header.
 881                             (point-max))))
 882             ;; Delete the headers from the displayed articles.
 883             (set-buffer gnus-article-copy)
 884             (let ((mail-header-separator ""))
 885               (delete-region (goto-char (point-min))
 886                              (or (message-goto-body) (point-max))))
 887             ;; Insert the original article headers.
 888             (insert-buffer-substring gnus-original-article-buffer beg end)
 889             ;; Decode charsets.
 890             (let ((gnus-article-decode-hook
 891                    (delq 'article-decode-charset
 892                          (copy-sequence gnus-article-decode-hook)))
 893                   (rfc2047-quote-decoded-words-containing-tspecials t))
 894               (run-hooks 'gnus-article-decode-hook)))))
 895       gnus-article-copy)))
 896
 897 (defun gnus-post-news (post &optional group header article-buffer yank subject
 898                             force-news)
 899   (when article-buffer
 900     (gnus-copy-article-buffer))
 901   (let ((gnus-article-reply (and article-buffer (gnus-summary-article-number)))
 902         (gnus-article-yanked-articles yank)
 903         (add-to-list gnus-add-to-list))
 904     (gnus-setup-message (cond (yank 'reply-yank)
 905                               (article-buffer 'reply)
 906                               (t 'message))
 907       (let* ((group (or group gnus-newsgroup-name))
 908              (charset (gnus-group-name-charset nil group))
 909              (pgroup group)
 910              to-address to-group mailing-list to-list
 911              newsgroup-p)
 912         (when group
 913           (setq to-address (gnus-parameter-to-address group)
 914                 to-group (gnus-group-find-parameter group 'to-group)
 915                 to-list (gnus-parameter-to-list group)
 916                 newsgroup-p (gnus-group-find-parameter group 'newsgroup)
 917                 mailing-list (when gnus-mailing-list-groups
 918                                (string-match gnus-mailing-list-groups group))
 919                 group (gnus-group-name-decode (gnus-group-real-name group)
 920                                               charset)))
 921         (if (or (and to-group
 922                      (gnus-news-group-p to-group))
 923                 newsgroup-p
 924                 force-news
 925                 (and (gnus-news-group-p
 926                       (or pgroup gnus-newsgroup-name)
 927                       (or header gnus-current-article))
 928                      (not mailing-list)
 929                      (not to-list)
 930                      (not to-address)))
 931             ;; This is news.
 932             (if post
 933                 (message-news
 934                  (or to-group
 935                      (and (not (gnus-virtual-group-p pgroup)) group)))
 936               (set-buffer gnus-article-copy)
 937               (gnus-msg-treat-broken-reply-to)
 938               (message-followup (if (or newsgroup-p force-news)
 939                                     (if (save-restriction
 940                                           (article-narrow-to-head)
 941                                           (message-fetch-field "newsgroups"))
 942                                         nil
 943                                       "")
 944                                   to-group)))
 945           ;; The is mail.
 946           (if post
 947               (progn
 948                 (message-mail (or to-address to-list))
 949                 ;; Arrange for mail groups that have no `to-address' to
 950                 ;; get that when the user sends off the mail.
 951                 (when (and (not to-list)
 952                            (not to-address)
 953                            add-to-list)
 954                   (push (list 'gnus-inews-add-to-address pgroup)
 955                         message-send-actions)))
 956             (set-buffer gnus-article-copy)
 957             (gnus-msg-treat-broken-reply-to)
 958             (message-wide-reply to-address)))
 959         (when yank
 960           (gnus-inews-yank-articles yank))))))
 961
 962 (defun gnus-msg-treat-broken-reply-to (&optional force)
 963   "Remove the Reply-to header if broken-reply-to."
 964   (when (or force
 965             (gnus-group-find-parameter
 966              gnus-newsgroup-name 'broken-reply-to))
 967     (save-restriction
 968       (message-narrow-to-head)
 969       (message-remove-header "reply-to"))))
 970
 971 (defun gnus-post-method (arg group &optional silent)
 972   "Return the posting method based on GROUP and ARG.
 973 If SILENT, don't prompt the user."
 974   (let ((gnus-post-method (or (gnus-parameter-post-method group)
 975                               gnus-post-method))
 976         (group-method (gnus-find-method-for-group group)))
 977     (cond
 978      ;; If the group-method is nil (which shouldn't happen) we use
 979      ;; the default method.
 980      ((null group-method)
 981       (or (and (listp gnus-post-method) ;If not current/native/nil
 982                (not (listp (car gnus-post-method))) ; and not a list of methods
 983                gnus-post-method)        ;then use it.
 984           gnus-select-method
 985           message-post-method))
 986      ;; We want the inverse of the default
 987      ((and arg (not (eq arg 0)))
 988       (if (eq gnus-post-method 'current)
 989           gnus-select-method
 990         group-method))
 991      ;; We query the user for a post method.
 992      ((or arg
 993           (and (listp gnus-post-method)
 994                (listp (car gnus-post-method))))
 995       (let* ((methods
 996               ;; Collect all methods we know about.
 997               (append
 998                (when (listp gnus-post-method)
 999                  (if (listp (car gnus-post-method))
1000                      gnus-post-method
1001                    (list gnus-post-method)))
1002                gnus-secondary-select-methods
1003                (mapcar 'cdr gnus-server-alist)
1004                (mapcar 'car gnus-opened-servers)
1005                (list gnus-select-method)
1006                (list group-method)))
1007              method-alist post-methods method)
1008         ;; Weed out all mail methods.
1009         (while methods
1010           (setq method (gnus-server-get-method "" (pop methods)))
1011           (when (and (or (gnus-method-option-p method 'post)
1012                          (gnus-method-option-p method 'post-mail))
1013                      (not (member method post-methods)))
1014             (push method post-methods)))
1015         ;; Create a name-method alist.
1016         (setq method-alist
1017               (mapcar
1018                (lambda (m)
1019                  (if (equal (cadr m) "")
1020                      (list (symbol-name (car m)) m)
1021                    (list (concat (cadr m) " (" (symbol-name (car m)) ")") m)))
1022                post-methods))
1023         ;; Query the user.
1024         (cadr
1025          (assoc
1026           (setq gnus-last-posting-server
1027                 (if (and silent
1028                          gnus-last-posting-server)
1029                     ;; Just use the last value.
1030                     gnus-last-posting-server
1031                   (gnus-completing-read
1032                    "Posting method" (mapcar 'car method-alist) t
1033                    (cons (or gnus-last-posting-server "") 0))))
1034           method-alist))))
1035      ;; Override normal method.
1036      ((and (eq gnus-post-method 'current)
1037            (not (memq (car group-method) gnus-discouraged-post-methods))
1038            (gnus-get-function group-method 'request-post t))
1039       (assert (not arg))
1040       group-method)
1041      ;; Use gnus-post-method.
1042      ((listp gnus-post-method)          ;A method...
1043       (assert (not (listp (car gnus-post-method)))) ;... not a list of methods.
1044       gnus-post-method)
1045      ;; Use the normal select method (nil or native).
1046      (t gnus-select-method))))
1047
1048 \f
1049
1050 (defun gnus-extended-version ()
1051   "Stringified Gnus version and Emacs version.
1052 See the variable `gnus-user-agent'."
1053   (interactive)
1054   (if (stringp gnus-user-agent)
1055       gnus-user-agent
1056     ;; `gnus-user-agent' is a list:
1057     (let* ((float-output-format nil)
1058            (gnus-v
1059             (when (memq 'gnus gnus-user-agent)
1060               (concat "Gnus/"
1061                       (prin1-to-string (gnus-continuum-version gnus-version) t)
1062                       " (" gnus-version ")")))
1063            (emacs-v (gnus-emacs-version)))
1064       (concat gnus-v (when (and gnus-v emacs-v) " ")
1065               emacs-v))))
1066
1067 \f
1068 ;;;
1069 ;;; Gnus Mail Functions
1070 ;;;
1071
1072 ;;; Mail reply commands of Gnus summary mode
1073
1074 (defun gnus-summary-reply (&optional yank wide very-wide)
1075   "Start composing a mail reply to the current message.
1076 If prefix argument YANK is non-nil, the original article is yanked
1077 automatically.
1078 If WIDE, make a wide reply.
1079 If VERY-WIDE, make a very wide reply."
1080   (interactive
1081    (list (and current-prefix-arg
1082               (gnus-summary-work-articles 1))))
1083   ;; Allow user to require confirmation before replying by mail to the
1084   ;; author of a news article (or mail message).
1085   (when (or
1086             (not (or (gnus-news-group-p gnus-newsgroup-name)
1087                      gnus-confirm-treat-mail-like-news))
1088             (not (cond ((stringp gnus-confirm-mail-reply-to-news)
1089                         (string-match gnus-confirm-mail-reply-to-news
1090                                       gnus-newsgroup-name))
1091                        ((functionp gnus-confirm-mail-reply-to-news)
1092                         (funcall gnus-confirm-mail-reply-to-news gnus-newsgroup-name))
1093                        (t gnus-confirm-mail-reply-to-news)))
1094             (if (or wide very-wide)
1095                 t ;; Ignore gnus-confirm-mail-reply-to-news for wide and very
1096                   ;; wide replies.
1097               (y-or-n-p "Really reply by mail to article author? ")))
1098     (let* ((article
1099             (if (listp (car yank))
1100                 (caar yank)
1101               (car yank)))
1102            (gnus-article-reply (or article (gnus-summary-article-number)))
1103            (gnus-article-yanked-articles yank)
1104            (headers ""))
1105       ;; Stripping headers should be specified with mail-yank-ignored-headers.
1106       (when yank
1107         (gnus-summary-goto-subject article))
1108       (gnus-setup-message (if yank 'reply-yank 'reply)
1109         (if (not very-wide)
1110             (gnus-summary-select-article)
1111           (dolist (article very-wide)
1112             (gnus-summary-select-article nil nil nil article)
1113             (with-current-buffer (gnus-copy-article-buffer)
1114               (gnus-msg-treat-broken-reply-to)
1115               (save-restriction
1116                 (message-narrow-to-head)
1117                 (setq headers (concat headers (buffer-string)))))))
1118         (set-buffer (gnus-copy-article-buffer))
1119         (gnus-msg-treat-broken-reply-to gnus-msg-force-broken-reply-to)
1120         (save-restriction
1121           (message-narrow-to-head)
1122           (when very-wide
1123             (erase-buffer)
1124             (insert headers))
1125           (goto-char (point-max)))
1126         (mml-quote-region (point) (point-max))
1127         (message-reply nil wide)
1128         (when yank
1129           (gnus-inews-yank-articles yank))
1130         (gnus-summary-handle-replysign)))))
1131
1132 (defun gnus-summary-handle-replysign ()
1133   "Check the various replysign variables and take action accordingly."
1134   (when (or gnus-message-replysign gnus-message-replyencrypt)
1135     (let (signed encrypted)
1136       (with-current-buffer gnus-article-buffer
1137         (setq signed (memq 'signed gnus-article-wash-types))
1138         (setq encrypted (memq 'encrypted gnus-article-wash-types)))
1139       (cond ((and gnus-message-replyencrypt encrypted)
1140              (mml-secure-message mml-default-encrypt-method
1141                                  (if gnus-message-replysignencrypted
1142                                      'signencrypt
1143                                    'encrypt)))
1144             ((and gnus-message-replysign signed)
1145              (mml-secure-message mml-default-sign-method 'sign))))))
1146
1147 (defun gnus-summary-reply-with-original (n &optional wide)
1148   "Start composing a reply mail to the current message.
1149 The original article will be yanked."
1150   (interactive "P")
1151   (gnus-summary-reply (gnus-summary-work-articles n) wide))
1152
1153 (defun gnus-summary-reply-broken-reply-to (&optional yank wide very-wide)
1154   "Like `gnus-summary-reply' except removing reply-to field.
1155 If prefix argument YANK is non-nil, the original article is yanked
1156 automatically.
1157 If WIDE, make a wide reply.
1158 If VERY-WIDE, make a very wide reply."
1159   (interactive
1160    (list (and current-prefix-arg
1161               (gnus-summary-work-articles 1))))
1162   (let ((gnus-msg-force-broken-reply-to t))
1163     (gnus-summary-reply yank wide very-wide)))
1164
1165 (defun gnus-summary-reply-broken-reply-to-with-original (n &optional wide)
1166   "Like `gnus-summary-reply-with-original' except removing reply-to field.
1167 The original article will be yanked."
1168   (interactive "P")
1169   (gnus-summary-reply-broken-reply-to (gnus-summary-work-articles n) wide))
1170
1171 (defun gnus-summary-wide-reply (&optional yank)
1172   "Start composing a wide reply mail to the current message.
1173 If prefix argument YANK is non-nil, the original article is yanked
1174 automatically."
1175   (interactive
1176    (list (and current-prefix-arg
1177               (gnus-summary-work-articles 1))))
1178   (gnus-summary-reply yank t))
1179
1180 (defun gnus-summary-wide-reply-with-original (n)
1181   "Start composing a wide reply mail to the current message.
1182 The original article will be yanked.
1183 Uses the process/prefix convention."
1184   (interactive "P")
1185   (gnus-summary-reply-with-original n t))
1186
1187 (defun gnus-summary-very-wide-reply (&optional yank)
1188   "Start composing a very wide reply mail to the current message.
1189 If prefix argument YANK is non-nil, the original article is yanked
1190 automatically."
1191   (interactive
1192    (list (and current-prefix-arg
1193               (gnus-summary-work-articles 1))))
1194   (gnus-summary-reply yank t (gnus-summary-work-articles yank)))
1195
1196 (defun gnus-summary-very-wide-reply-with-original (n)
1197   "Start composing a very wide reply mail to the current message.
1198 The original article will be yanked."
1199   (interactive "P")
1200   (gnus-summary-reply
1201    (gnus-summary-work-articles n) t (gnus-summary-work-articles n)))
1202
1203 (defun gnus-summary-mail-forward (&optional arg post)
1204   "Forward the current message(s) to another user.
1205 If process marks exist, forward all marked messages;
1206 if ARG is nil, see `message-forward-as-mime' and `message-forward-show-mml';
1207 if ARG is 1, decode the message and forward directly inline;
1208 if ARG is 2, forward message as an rfc822 MIME section;
1209 if ARG is 3, decode message and forward as an rfc822 MIME section;
1210 if ARG is 4, forward message directly inline;
1211 otherwise, use flipped `message-forward-as-mime'.
1212 If POST, post instead of mail.
1213 For the `inline' alternatives, also see the variable
1214 `message-forward-ignored-headers'."
1215   (interactive "P")
1216   (if (cdr (gnus-summary-work-articles nil))
1217       ;; Process marks are given.
1218       (gnus-uu-digest-mail-forward arg post)
1219     ;; No process marks.
1220     (let ((message-forward-as-mime message-forward-as-mime)
1221           (message-forward-show-mml message-forward-show-mml))
1222       (cond
1223        ((null arg))
1224        ((eq arg 1)
1225         (setq message-forward-as-mime nil
1226               message-forward-show-mml t))
1227        ((eq arg 2)
1228         (setq message-forward-as-mime t
1229               message-forward-show-mml nil))
1230        ((eq arg 3)
1231         (setq message-forward-as-mime t
1232               message-forward-show-mml t))
1233        ((eq arg 4)
1234         (setq message-forward-as-mime nil
1235               message-forward-show-mml nil))
1236        (t
1237         (setq message-forward-as-mime (not message-forward-as-mime))))
1238       (let* ((gnus-article-reply (gnus-summary-article-number))
1239              (gnus-article-yanked-articles (list gnus-article-reply)))
1240         (gnus-setup-message 'forward
1241           (gnus-summary-select-article)
1242           (let ((mail-parse-charset
1243                  (or (and (gnus-buffer-live-p gnus-article-buffer)
1244                           (with-current-buffer gnus-article-buffer
1245                             gnus-article-charset))
1246                      gnus-newsgroup-charset))
1247                 (mail-parse-ignored-charsets
1248                  gnus-newsgroup-ignored-charsets))
1249             (set-buffer gnus-original-article-buffer)
1250             (message-forward post)))))))
1251
1252 (defun gnus-summary-resend-message (address n)
1253   "Resend the current article to ADDRESS."
1254   (interactive
1255    (list (message-read-from-minibuffer
1256           "Resend message(s) to: "
1257           (when (and gnus-summary-resend-default-address
1258                      (gnus-buffer-live-p gnus-original-article-buffer))
1259             ;; If some other article is currently selected, the
1260             ;; initial-contents is wrong. Whatever, it is just the
1261             ;; initial-contents.
1262             (with-current-buffer gnus-original-article-buffer
1263               (nnmail-fetch-field "to"))))
1264          current-prefix-arg))
1265   (dolist (article (gnus-summary-work-articles n))
1266     (gnus-summary-select-article nil nil nil article)
1267     (with-current-buffer gnus-original-article-buffer
1268       (let ((gnus-gcc-externalize-attachments nil))
1269         (message-resend address)))
1270     (gnus-summary-mark-article-as-forwarded article)))
1271
1272 ;; From: Matthieu Moy <Matthieu.Moy@imag.fr>
1273 (defun gnus-summary-resend-message-edit ()
1274   "Resend an article that has already been sent.
1275 A new buffer will be created to allow the user to modify body and
1276 contents of the message, and then, everything will happen as when
1277 composing a new message."
1278   (interactive)
1279   (let ((mail-parse-charset gnus-newsgroup-charset))
1280     (gnus-setup-message 'reply-yank
1281       (gnus-summary-select-article t)
1282       (set-buffer gnus-original-article-buffer)
1283       (let ((cur (current-buffer))
1284             (to (message-fetch-field "to")))
1285         ;; Get a normal message buffer.
1286         (message-pop-to-buffer (message-buffer-name "Resend" to))
1287         (insert-buffer-substring cur)
1288         (mime-to-mml)
1289         (message-narrow-to-head-1)
1290         ;; Gnus will generate a new one when sending.
1291         (message-remove-header "Message-ID")
1292         ;; Remove unwanted headers.
1293         (message-remove-header message-ignored-resent-headers t)
1294         (goto-char (point-max))
1295         (insert mail-header-separator)
1296         ;; Add Gcc header.
1297         (gnus-inews-insert-gcc)
1298         (goto-char (point-min))
1299         (when (re-search-forward "^To:\\|^Newsgroups:" nil 'move)
1300           (forward-char 1))
1301         (widen)))))
1302
1303 (defun gnus-summary-post-forward (&optional arg)
1304   "Forward the current article to a newsgroup.
1305 See `gnus-summary-mail-forward' for ARG."
1306   (interactive "P")
1307   (gnus-summary-mail-forward arg t))
1308
1309 (defun gnus-summary-mail-crosspost-complaint (n)
1310   "Send a complaint about crossposting to the current article(s)."
1311   (interactive "P")
1312   (dolist (article (gnus-summary-work-articles n))
1313     (set-buffer gnus-summary-buffer)
1314     (gnus-summary-goto-subject article)
1315     (let ((group (gnus-group-real-name gnus-newsgroup-name))
1316           newsgroups followup-to)
1317       (gnus-summary-select-article)
1318       (set-buffer gnus-original-article-buffer)
1319       (if (and (<= (length (message-tokenize-header
1320                             (setq newsgroups
1321                                   (mail-fetch-field "newsgroups"))
1322                             ", "))
1323                    1)
1324                (or (not (setq followup-to (mail-fetch-field "followup-to")))
1325                    (not (member group (message-tokenize-header
1326                                        followup-to ", ")))))
1327           (if followup-to
1328               (gnus-message 1 "Followup-to restricted")
1329             (gnus-message 1 "Not a crossposted article"))
1330         (set-buffer gnus-summary-buffer)
1331         (gnus-summary-reply-with-original 1)
1332         (set-buffer gnus-message-buffer)
1333         (message-goto-body)
1334         (insert (format gnus-crosspost-complaint newsgroups group))
1335         (message-goto-subject)
1336         (re-search-forward " *$")
1337         (replace-match " (crosspost notification)" t t)
1338         (gnus-deactivate-mark)
1339         (when (gnus-y-or-n-p "Send this complaint? ")
1340           (message-send-and-exit))))))
1341
1342 (defun gnus-mail-parse-comma-list ()
1343   (let (accumulated
1344         beg)
1345     (skip-chars-forward " ")
1346     (while (not (eobp))
1347       (setq beg (point))
1348       (skip-chars-forward "^,")
1349       (while (zerop
1350               (save-excursion
1351                 (save-restriction
1352                   (let ((i 0))
1353                     (narrow-to-region beg (point))
1354                     (goto-char beg)
1355                     (logand (progn
1356                               (while (search-forward "\"" nil t)
1357                                 (incf i))
1358                               (if (zerop i) 2 i))
1359                             2)))))
1360         (skip-chars-forward ",")
1361         (skip-chars-forward "^,"))
1362       (skip-chars-backward " ")
1363       (push (buffer-substring beg (point))
1364             accumulated)
1365       (skip-chars-forward "^,")
1366       (skip-chars-forward ", "))
1367     accumulated))
1368
1369 (defun gnus-inews-add-to-address (group)
1370   (let ((to-address (mail-fetch-field "to")))
1371     (when (and to-address
1372                (gnus-alive-p))
1373       ;; This mail group doesn't have a `to-list', so we add one
1374       ;; here.  Magic!
1375       (when (gnus-y-or-n-p
1376              (format "Do you want to add this as `to-list': %s? " to-address))
1377         (gnus-group-add-parameter group (cons 'to-list to-address))))))
1378
1379 (defun gnus-put-message ()
1380   "Put the current message in some group and return to Gnus."
1381   (interactive)
1382   (let ((reply gnus-article-reply)
1383         (winconf gnus-prev-winconf)
1384         (group gnus-newsgroup-name))
1385     (unless (and group
1386                  (not (gnus-group-read-only-p group)))
1387       (setq group (read-string "Put in group: " nil (gnus-writable-groups))))
1388
1389     (when (gnus-group-entry group)
1390       (error "No such group: %s" group))
1391     (save-excursion
1392       (save-restriction
1393         (widen)
1394         (message-narrow-to-headers)
1395         (let ((gnus-deletable-headers nil))
1396           (message-generate-headers
1397            (if (message-news-p)
1398                message-required-news-headers
1399              message-required-mail-headers)))
1400         (goto-char (point-max))
1401         (if (string-match " " group)
1402             (insert "Gcc: \"" group "\"\n")
1403           (insert "Gcc: " group "\n"))
1404         (widen)))
1405     (gnus-inews-do-gcc)
1406     (when (and (get-buffer gnus-group-buffer)
1407                (gnus-buffer-exists-p (car-safe reply))
1408                (cdr reply))
1409       (set-buffer (car reply))
1410       (gnus-summary-mark-article-as-replied (cdr reply)))
1411     (when winconf
1412       (set-window-configuration winconf))))
1413
1414 (defun gnus-article-mail (yank)
1415   "Send a reply to the address near point.
1416 If YANK is non-nil, include the original article."
1417   (interactive "P")
1418   (let ((address
1419          (buffer-substring
1420           (save-excursion (re-search-backward "[ \t\n]" nil t) (1+ (point)))
1421           (save-excursion (re-search-forward "[ \t\n]" nil t) (1- (point))))))
1422     (when address
1423       (gnus-msg-mail address)
1424       (when yank
1425         (gnus-inews-yank-articles (list (cdr gnus-article-current)))))))
1426
1427 (defvar nntp-server-type)
1428 (defun gnus-bug ()
1429   "Send a bug report to the Gnus maintainers."
1430   (interactive)
1431   (unless (gnus-alive-p)
1432     (error "Gnus has been shut down"))
1433   (gnus-setup-message (if (message-mail-user-agent) 'message 'bug)
1434     (unless (message-mail-user-agent)
1435       (delete-other-windows)
1436       (when gnus-bug-create-help-buffer
1437         (switch-to-buffer "*Gnus Help Bug*")
1438         (erase-buffer)
1439         (insert gnus-bug-message)
1440         (goto-char (point-min)))
1441       (message-pop-to-buffer "*Gnus Bug*"))
1442     (let ((message-this-is-mail t))
1443       (message-setup `((To . ,gnus-maintainer) (Subject . ""))))
1444     (when gnus-bug-create-help-buffer
1445       (push `(gnus-bug-kill-buffer) message-send-actions))
1446     (goto-char (point-min))
1447     (re-search-forward (concat "^" (regexp-quote mail-header-separator) "$"))
1448     (forward-line 1)
1449     (insert (gnus-version) "\n"
1450             (emacs-version) "\n")
1451     (when (and (boundp 'nntp-server-type)
1452                (stringp nntp-server-type))
1453       (insert nntp-server-type))
1454     (insert "\n\n\n\n\n")
1455     (let (text)
1456       (with-current-buffer (gnus-get-buffer-create " *gnus environment info*")
1457         (erase-buffer)
1458         (gnus-debug)
1459         (setq text (buffer-string)))
1460       (insert "<#part type=application/emacs-lisp disposition=inline description=\"User settings\">\n" text "\n<#/part>"))
1461     (goto-char (point-min))
1462     (search-forward "Subject: " nil t)
1463     (message "")))
1464
1465 (defun gnus-bug-kill-buffer ()
1466   (when (get-buffer "*Gnus Help Bug*")
1467     (kill-buffer "*Gnus Help Bug*")))
1468
1469 (defun gnus-summary-yank-message (buffer n)
1470   "Yank the current article into a composed message."
1471   (interactive
1472    (list (gnus-completing-read "Buffer" (message-buffers) t)
1473          current-prefix-arg))
1474   (gnus-summary-iterate n
1475     (let ((gnus-inhibit-treatment t))
1476       (gnus-summary-select-article))
1477     (with-current-buffer buffer
1478       (message-yank-buffer gnus-article-buffer))))
1479
1480 (defun gnus-debug ()
1481   "Attempts to go through the Gnus source file and report what variables have been changed.
1482 The source file has to be in the Emacs load path."
1483   (interactive)
1484   (let ((files gnus-debug-files)
1485         (point (point))
1486         file expr olist sym)
1487     (gnus-message 4 "Please wait while we snoop your variables...")
1488     (sit-for 0)
1489     ;; Go through all the files looking for non-default values for variables.
1490     (with-current-buffer (gnus-get-buffer-create " *gnus bug info*")
1491       (while files
1492         (erase-buffer)
1493         (when (and (setq file (locate-library (pop files)))
1494                    (file-exists-p file))
1495           (insert-file-contents file)
1496           (goto-char (point-min))
1497           (if (not (re-search-forward "^;;* *Internal variables" nil t))
1498               (gnus-message 4 "Malformed sources in file %s" file)
1499             (narrow-to-region (point-min) (point))
1500             (goto-char (point-min))
1501             (while (setq expr (ignore-errors (read (current-buffer))))
1502               (ignore-errors
1503                 (and (or (eq (car expr) 'defvar)
1504                          (eq (car expr) 'defcustom))
1505                      (stringp (nth 3 expr))
1506                      (not (memq (nth 1 expr) gnus-debug-exclude-variables))
1507                      (or (not (boundp (nth 1 expr)))
1508                          (not (equal (eval (nth 2 expr))
1509                                      (symbol-value (nth 1 expr)))))
1510                      (push (nth 1 expr) olist)))))))
1511       (kill-buffer (current-buffer)))
1512     (when (setq olist (nreverse olist))
1513       (insert "------------------ Environment follows ------------------\n\n"))
1514     (while olist
1515       (if (boundp (car olist))
1516           (ignore-errors
1517            (gnus-pp
1518             `(setq ,(car olist)
1519                    ,(if (or (consp (setq sym (symbol-value (car olist))))
1520                             (and (symbolp sym)
1521                                  (not (or (eq sym nil)
1522                                           (eq sym t)))))
1523                         (list 'quote (symbol-value (car olist)))
1524                       (symbol-value (car olist))))))
1525         (insert ";; (makeunbound '" (symbol-name (car olist)) ")\n"))
1526       (setq olist (cdr olist)))
1527     (insert "\n\n")
1528     ;; Remove any control chars - they seem to cause trouble for some
1529     ;; mailers.  (Byte-compiled output from the stuff above.)
1530     (goto-char point)
1531     (while (re-search-forward (mm-string-to-multibyte
1532                                "[\000-\010\013-\037\200-\237]") nil t)
1533       (replace-match (format "\\%03o" (string-to-char (match-string 0)))
1534                      t t))))
1535
1536 ;;; Treatment of rejected articles.
1537 ;;; Bounced mail.
1538
1539 (defun gnus-summary-resend-bounced-mail (&optional fetch)
1540   "Re-mail the current message.
1541 This only makes sense if the current message is a bounce message that
1542 contains some mail you have written which has been bounced back to
1543 you.
1544 If FETCH, try to fetch the article that this is a reply to, if indeed
1545 this is a reply."
1546   (interactive "P")
1547   (gnus-summary-select-article t)
1548   (let (summary-buffer parent)
1549     (if fetch
1550         (progn
1551           (setq summary-buffer (current-buffer))
1552           (set-buffer gnus-original-article-buffer)
1553           (article-goto-body)
1554           (when (re-search-forward "^References:\n?" nil t)
1555             (while (memq (char-after) '(?\t ? ))
1556               (forward-line 1))
1557             (skip-chars-backward "\t\n ")
1558             (setq parent
1559                   (gnus-parent-id (buffer-substring (match-end 0) (point))))))
1560       (set-buffer gnus-original-article-buffer))
1561     (gnus-setup-message 'compose-bounce
1562       (message-bounce)
1563       ;; Add Gcc header.
1564       (gnus-inews-insert-gcc)
1565       ;; If there are references, we fetch the article we answered to.
1566       (when parent
1567         (with-current-buffer summary-buffer
1568           (gnus-summary-refer-article parent)
1569           (gnus-summary-show-all-headers))))))
1570
1571 ;;; Gcc handling.
1572
1573 (defun gnus-inews-group-method (group)
1574   (cond
1575    ;; If the group doesn't exist, we assume
1576    ;; it's an archive group...
1577    ((and (null (gnus-get-info group))
1578          (eq (car (gnus-server-to-method gnus-message-archive-method))
1579              (car (gnus-server-to-method (gnus-group-method group)))))
1580     gnus-message-archive-method)
1581    ;; Use the method.
1582    ((gnus-info-method (gnus-get-info group))
1583     (gnus-info-method (gnus-get-info group)))
1584    ;; Find the method.
1585    (t (gnus-server-to-method (gnus-group-method group)))))
1586
1587 ;; Do Gcc handling, which copied the message over to some group.
1588 (defun gnus-inews-do-gcc (&optional gcc)
1589   (interactive)
1590   (save-excursion
1591     (save-restriction
1592       (message-narrow-to-headers)
1593       (let ((gcc (or gcc (mail-fetch-field "gcc" nil t)))
1594             (cur (current-buffer))
1595             groups group method group-art
1596             mml-externalize-attachments)
1597         (when gcc
1598           (message-remove-header "gcc")
1599           (widen)
1600           (setq groups (message-unquote-tokens
1601                         (message-tokenize-header gcc " ,")))
1602           ;; Copy the article over to some group(s).
1603           (while (setq group (pop groups))
1604             (setq method (gnus-inews-group-method group)
1605                   group (mm-encode-coding-string
1606                          group
1607                          (gnus-group-name-charset method group)))
1608             (unless (gnus-check-server method)
1609               (error "Can't open server %s" (if (stringp method) method
1610                                               (car method))))
1611             (unless (gnus-request-group group t method)
1612               (gnus-request-create-group group method))
1613             (setq mml-externalize-attachments
1614                   (if (stringp gnus-gcc-externalize-attachments)
1615                       (string-match gnus-gcc-externalize-attachments group)
1616                     gnus-gcc-externalize-attachments))
1617             (save-excursion
1618               (nnheader-set-temp-buffer " *acc*")
1619               (insert-buffer-substring cur)
1620               (message-encode-message-body)
1621               (save-restriction
1622                 (message-narrow-to-headers)
1623                 (let* ((mail-parse-charset message-default-charset)
1624                        (newsgroups-field (save-restriction
1625                                            (message-narrow-to-headers-or-head)
1626                                            (message-fetch-field "Newsgroups")))
1627                        (followup-field (save-restriction
1628                                          (message-narrow-to-headers-or-head)
1629                                          (message-fetch-field "Followup-To")))
1630                        ;; BUG: We really need to get the charset for
1631                        ;; each name in the Newsgroups and Followup-To
1632                        ;; lines to allow crossposting between group
1633                        ;; namess with incompatible character sets.
1634                        ;; -- Per Abrahamsen <abraham@dina.kvl.dk> 2001-10-08.
1635                        (group-field-charset
1636                         (gnus-group-name-charset
1637                          method (or newsgroups-field "")))
1638                        (followup-field-charset
1639                         (gnus-group-name-charset
1640                          method (or followup-field "")))
1641                        (rfc2047-header-encoding-alist
1642                         (append
1643                          (when group-field-charset
1644                            (list (cons "Newsgroups" group-field-charset)))
1645                          (when followup-field-charset
1646                            (list (cons "Followup-To" followup-field-charset)))
1647                          rfc2047-header-encoding-alist)))
1648                   (mail-encode-encoded-word-buffer)))
1649               (goto-char (point-min))
1650               (when (re-search-forward
1651                      (concat "^" (regexp-quote mail-header-separator) "$")
1652                      nil t)
1653                 (replace-match "" t t ))
1654               (when (or (not (gnus-check-backend-function
1655                               'request-accept-article group))
1656                         (not (setq group-art
1657                                    (gnus-request-accept-article
1658                                     group method t t))))
1659                 (gnus-message 1 "Couldn't store article in group %s: %s"
1660                               group (gnus-status-message method)))
1661               (when (stringp method)
1662                 (setq method (gnus-server-to-method method)))
1663               (when (and (listp method)
1664                          (gnus-native-method-p method))
1665                 (setq group (gnus-group-short-name group)))
1666               (when (and group-art
1667                          ;; FIXME: Should gcc-mark-as-read work when
1668                          ;; Gnus is not running?
1669                          (gnus-alive-p)
1670                          (or gnus-gcc-mark-as-read
1671                              (and
1672                               (boundp 'gnus-inews-mark-gcc-as-read)
1673                               (symbol-value 'gnus-inews-mark-gcc-as-read))))
1674                 (gnus-group-mark-article-read group (cdr group-art)))
1675               (kill-buffer (current-buffer)))))))))
1676
1677 (defun gnus-inews-insert-gcc (&optional group)
1678   "Insert the Gcc to say where the article is to be archived."
1679   (let* ((group (or group gnus-newsgroup-name))
1680          (group (when group (gnus-group-decoded-name group)))
1681          (var (or gnus-outgoing-message-group gnus-message-archive-group))
1682          (gcc-self-val
1683           (and group (gnus-group-find-parameter group 'gcc-self)))
1684          result
1685          (groups
1686           (cond
1687            ((null gnus-message-archive-method)
1688             ;; Ignore.
1689             nil)
1690            ((stringp var)
1691             ;; Just a single group.
1692             (list var))
1693            ((null var)
1694             ;; We don't want this.
1695             nil)
1696            ((and (listp var) (stringp (car var)))
1697             ;; A list of groups.
1698             var)
1699            ((functionp var)
1700             ;; A function.
1701             (funcall var group))
1702            (t
1703             ;; An alist of regexps/functions/forms.
1704             (while (and var
1705                         (not
1706                          (setq result
1707                                (cond
1708                                 ((stringp (caar var))
1709                                  ;; Regexp.
1710                                  (when (string-match (caar var) group)
1711                                    (cdar var)))
1712                                 ((functionp (car var))
1713                                  ;; Function.
1714                                  (funcall (car var) group))
1715                                 (t
1716                                  (eval (car var)))))))
1717               (setq var (cdr var)))
1718             result)))
1719          name)
1720     (when (or groups gcc-self-val)
1721       (when (stringp groups)
1722         (setq groups (list groups)))
1723       (save-excursion
1724         (save-restriction
1725           (message-narrow-to-headers)
1726           (goto-char (point-max))
1727           (insert "Gcc: ")
1728           (if gcc-self-val
1729               ;; Use the `gcc-self' param value instead.
1730               (progn
1731                 (insert
1732                  (if (stringp gcc-self-val)
1733                      (if (string-match " " gcc-self-val)
1734                          (concat "\"" gcc-self-val "\"")
1735                        gcc-self-val)
1736                    ;; In nndoc groups, we use the parent group name
1737                    ;; instead of the current group.
1738                    (let ((group (or (gnus-group-find-parameter
1739                                      gnus-newsgroup-name 'parent-group)
1740                                     group)))
1741                      (if (string-match " " group)
1742                          (concat "\"" group "\"")
1743                        group))))
1744                 (if (not (eq gcc-self-val 'none))
1745                     (insert "\n")
1746                   (gnus-delete-line)))
1747             ;; Use the list of groups.
1748             (while (setq name (pop groups))
1749               (let ((str (if (string-match ":" name)
1750                              name
1751                            (gnus-group-prefixed-name
1752                             name gnus-message-archive-method))))
1753                 (insert (if (string-match " " str)
1754                             (concat "\"" str "\"")
1755                           str)))
1756               (when groups
1757                 (insert " ")))
1758             (insert "\n")))))))
1759
1760 (defun gnus-mailing-list-followup-to ()
1761   "Look at the headers in the current buffer and return a Mail-Followup-To address."
1762   (let ((x-been-there (gnus-fetch-original-field "x-beenthere"))
1763         (list-post (gnus-fetch-original-field "list-post")))
1764     (when (and list-post
1765                (string-match "mailto:\\([^>]+\\)" list-post))
1766       (setq list-post (match-string 1 list-post)))
1767     (or list-post
1768         x-been-there)))
1769
1770 ;;; Posting styles.
1771
1772 (defun gnus-configure-posting-styles (&optional group-name)
1773   "Configure posting styles according to `gnus-posting-styles'."
1774   (unless gnus-inhibit-posting-styles
1775     (let ((group (or group-name gnus-newsgroup-name ""))
1776           (styles gnus-posting-styles)
1777           style match attribute value v results
1778           filep name address element)
1779       ;; If the group has a posting-style parameter, add it at the end with a
1780       ;; regexp matching everything, to be sure it takes precedence over all
1781       ;; the others.
1782       (when gnus-newsgroup-name
1783         (let ((tmp-style (gnus-group-find-parameter group 'posting-style t)))
1784           (when tmp-style
1785             (setq styles (append styles (list (cons ".*" tmp-style)))))))
1786       ;; Go through all styles and look for matches.
1787       (dolist (style styles)
1788         (setq match (pop style))
1789         (goto-char (point-min))
1790         (when (cond
1791                ((stringp match)
1792                 ;; Regexp string match on the group name.
1793                 (string-match match group))
1794                ((eq match 'header)
1795                 ;; Obsolete format of header match.
1796                 (and (gnus-buffer-live-p gnus-article-copy)
1797                      (with-current-buffer gnus-article-copy
1798                        (save-restriction
1799                          (nnheader-narrow-to-headers)
1800                          (let ((header (message-fetch-field (pop style))))
1801                            (and header
1802                                 (string-match (pop style) header)))))))
1803                ((or (symbolp match)
1804                     (functionp match))
1805                 (cond
1806                  ((functionp match)
1807                   ;; Function to be called.
1808                   (funcall match))
1809                  ((boundp match)
1810                   ;; Variable to be checked.
1811                   (symbol-value match))))
1812                ((listp match)
1813                 (cond
1814                  ((eq (car match) 'header)
1815                   ;; New format of header match.
1816                   (and (gnus-buffer-live-p gnus-article-copy)
1817                        (with-current-buffer gnus-article-copy
1818                          (save-restriction
1819                            (nnheader-narrow-to-headers)
1820                            (let ((header (message-fetch-field (nth 1 match))))
1821                              (and header
1822                                   (string-match (nth 2 match) header)))))))
1823                  (t
1824                   ;; This is a form to be evaled.
1825                   (eval match)))))
1826           ;; We have a match, so we set the variables.
1827           (dolist (attribute style)
1828             (setq element (pop attribute)
1829                   filep nil)
1830             (setq value
1831                   (cond
1832                    ((eq (car attribute) :file)
1833                     (setq filep t)
1834                     (cadr attribute))
1835                    ((eq (car attribute) :value)
1836                     (cadr attribute))
1837                    (t
1838                     (car attribute))))
1839             ;; We get the value.
1840             (setq v
1841                   (cond
1842                    ((stringp value)
1843                     (if (and (stringp match)
1844                              (gnus-string-match-p "\\\\[&[:digit:]]" value)
1845                              (match-beginning 1))
1846                         (gnus-match-substitute-replacement value nil nil group)
1847                       value))
1848                    ((or (symbolp value)
1849                         (functionp value))
1850                     (cond ((functionp value)
1851                            (funcall value))
1852                           ((boundp value)
1853                            (symbol-value value))))
1854                    ((listp value)
1855                     (eval value))))
1856             ;; Translate obsolescent value.
1857             (cond
1858              ((eq element 'signature-file)
1859               (setq element 'signature
1860                     filep t))
1861              ((eq element 'x-face-file)
1862               (setq element 'x-face
1863                     filep t)))
1864             ;; Post-processing for the signature posting-style:
1865             (and (eq element 'signature) filep
1866                  message-signature-directory
1867                  ;; don't actually use the signature directory
1868                  ;; if message-signature-file contains a path.
1869                  (not (file-name-directory v))
1870                  (setq v (nnheader-concat message-signature-directory v)))
1871             ;; Get the contents of file elems.
1872             (when (and filep v)
1873               (setq v (with-temp-buffer
1874                         (insert-file-contents v)
1875                         (buffer-substring
1876                          (point-min)
1877                          (progn
1878                            (goto-char (point-max))
1879                            (if (zerop (skip-chars-backward "\n"))
1880                                (point)
1881                              (1+ (point))))))))
1882             (setq results (delq (assoc element results) results))
1883             (push (cons element v) results))))
1884       ;; Now we have all the styles, so we insert them.
1885       (setq name (assq 'name results)
1886             address (assq 'address results))
1887       (setq results (delq name (delq address results)))
1888       (gnus-make-local-hook 'message-setup-hook)
1889       (setq results (sort results (lambda (x y)
1890                                     (string-lessp (car x) (car y)))))
1891       (dolist (result results)
1892         (add-hook 'message-setup-hook
1893                   (cond
1894                    ((eq 'eval (car result))
1895                     'ignore)
1896                    ((eq 'body (car result))
1897                     `(lambda ()
1898                        (save-excursion
1899                          (message-goto-body)
1900                          (insert ,(cdr result)))))
1901                    ((eq 'signature (car result))
1902                     (set (make-local-variable 'message-signature) nil)
1903                     (set (make-local-variable 'message-signature-file) nil)
1904                     (if (not (cdr result))
1905                         'ignore
1906                       `(lambda ()
1907                          (save-excursion
1908                            (let ((message-signature ,(cdr result)))
1909                              (when message-signature
1910                                (message-insert-signature)))))))
1911                    (t
1912                     (let ((header
1913                            (if (symbolp (car result))
1914                                (capitalize (symbol-name (car result)))
1915                              (car result))))
1916                       `(lambda ()
1917                          (save-excursion
1918                            (message-remove-header ,header)
1919                            (let ((value ,(cdr result)))
1920                              (when value
1921                                (message-goto-eoh)
1922                                (insert ,header ": " value)
1923                                (unless (bolp)
1924                                  (insert "\n")))))))))
1925                   nil 'local))
1926       (when (or name address)
1927         (add-hook 'message-setup-hook
1928                   `(lambda ()
1929                      (set (make-local-variable 'user-mail-address)
1930                           ,(or (cdr address) user-mail-address))
1931                      (let ((user-full-name ,(or (cdr name) (user-full-name)))
1932                            (user-mail-address
1933                             ,(or (cdr address) user-mail-address)))
1934                        (save-excursion
1935                          (message-remove-header "From")
1936                          (message-goto-eoh)
1937                          (insert "From: " (message-make-from) "\n"))))
1938                   nil 'local)))))
1939
1940 ;;; Allow redefinition of functions.
1941
1942 (gnus-ems-redefine)
1943
1944 (provide 'gnus-msg)
1945
1946 ;;; gnus-msg.el ends here