code.delx.au - gnu-emacs/blob - 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 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 2, or (at your option)
  15 ;; 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; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  25 ;; Boston, MA 02110-1301, USA.
  26
  27 ;;; Commentary:
  28
  29 ;;; Code:
  30
  31 (eval-when-compile (require 'cl))
  32
  33 (require 'gnus)
  34 (require 'gnus-ems)
  35 (require 'message)
  36 (require 'gnus-art)
  37 (require 'gnus-util)
  38
  39 (defcustom gnus-post-method 'current
  40   "*Preferred method for posting USENET news.
  41
  42 If this variable is `current' (which is the default), Gnus will use
  43 the \"current\" select method when posting.  If it is `native', Gnus
  44 will use the native select method when posting.
  45
  46 This method will not be used in mail groups and the like, only in
  47 \"real\" newsgroups.
  48
  49 If not `native' nor `current', the value must be a valid method as discussed
  50 in the documentation of `gnus-select-method'.  It can also be a list of
  51 methods.  If that is the case, the user will be queried for what select
  52 method to use when posting."
  53   :group 'gnus-group-foreign
  54   :link '(custom-manual "(gnus)Posting Server")
  55   :type `(choice (const native)
  56                  (const current)
  57                  (sexp :tag "Methods" ,gnus-select-method)))
  58
  59 (defcustom gnus-outgoing-message-group nil
  60   "*All outgoing messages will be put in this group.
  61 If you want to store all your outgoing mail and articles in the group
  62 \"nnml:archive\", you set this variable to that value.  This variable
  63 can also be a list of group names.
  64
  65 If you want to have greater control over what group to put each
  66 message in, you can set this variable to a function that checks the
  67 current newsgroup name and then returns a suitable group name (or list
  68 of names)."
  69   :group 'gnus-message
  70   :type '(choice (string :tag "Group")
  71                  (function)))
  72
  73 (defcustom gnus-mailing-list-groups nil
  74   "*If non-nil a regexp matching groups that are really mailing lists.
  75 This is useful when you're reading a mailing list that has been
  76 gatewayed to a newsgroup, and you want to followup to an article in
  77 the group."
  78   :group 'gnus-message
  79   :type '(choice (regexp)
  80                  (const nil)))
  81
  82 (defcustom gnus-add-to-list nil
  83   "*If non-nil, add a `to-list' parameter automatically."
  84   :group 'gnus-message
  85   :type 'boolean)
  86
  87 (defcustom gnus-crosspost-complaint
  88   "Hi,
  89
  90 You posted the article below with the following Newsgroups header:
  91
  92 Newsgroups: %s
  93
  94 The %s group, at least, was an inappropriate recipient
  95 of this message.  Please trim your Newsgroups header to exclude this
  96 group before posting in the future.
  97
  98 Thank you.
  99
 100 "
 101   "Format string to be inserted when complaining about crossposts.
 102 The first %s will be replaced by the Newsgroups header;
 103 the second with the current group name."
 104   :group 'gnus-message
 105   :type 'string)
 106
 107 (defcustom gnus-message-setup-hook nil
 108   "Hook run after setting up a message buffer."
 109   :group 'gnus-message
 110   :type 'hook)
 111
 112 (defcustom gnus-bug-create-help-buffer t
 113   "*Should we create the *Gnus Help Bug* buffer?"
 114   :group 'gnus-message
 115   :type 'boolean)
 116
 117 (defcustom gnus-posting-styles nil
 118   "*Alist of styles to use when posting.
 119 See Info node `(gnus)Posting Styles'."
 120   :group 'gnus-message
 121   :link '(custom-manual "(gnus)Posting Styles")
 122   :type '(repeat (cons (choice (regexp)
 123                                (variable)
 124                                (list (const header)
 125                                      (string :tag "Header")
 126                                      (regexp :tag "Regexp"))
 127                                (function)
 128                                (sexp))
 129                        (repeat (list
 130                                 (choice (const signature)
 131                                         (const signature-file)
 132                                         (const organization)
 133                                         (const address)
 134                                         (const x-face-file)
 135                                         (const name)
 136                                         (const body)
 137                                         (symbol)
 138                                         (string :tag "Header"))
 139                                 (choice (string)
 140                                         (function)
 141                                         (variable)
 142                                         (sexp)))))))
 143
 144 (defcustom gnus-gcc-mark-as-read nil
 145   "If non-nil, automatically mark Gcc articles as read."
 146   :version "22.1"
 147   :group 'gnus-message
 148   :type 'boolean)
 149
 150 (make-obsolete-variable 'gnus-inews-mark-gcc-as-read
 151                         'gnus-gcc-mark-as-read)
 152
 153 (defcustom gnus-gcc-externalize-attachments nil
 154   "Should local-file attachments be included as external parts in Gcc copies?
 155 If it is `all', attach files as external parts;
 156 if a regexp and matches the Gcc group name, attach files as external parts;
 157 if nil, attach files as normal parts."
 158   :version "22.1"
 159   :group 'gnus-message
 160   :type '(choice (const nil :tag "None")
 161                  (const all :tag "Any")
 162                  (string :tag "Regexp")))
 163
 164 (gnus-define-group-parameter
 165  posting-charset-alist
 166  :type list
 167  :function-document
 168  "Return the permitted unencoded charsets for posting of GROUP."
 169  :variable gnus-group-posting-charset-alist
 170  :variable-default
 171   '(("^\\(no\\|fr\\)\\.[^,]*\\(,[ \t\n]*\\(no\\|fr\\)\\.[^,]*\\)*$" iso-8859-1 (iso-8859-1))
 172     ("^\\(fido7\\|relcom\\)\\.[^,]*\\(,[ \t\n]*\\(fido7\\|relcom\\)\\.[^,]*\\)*$" koi8-r (koi8-r))
 173     (message-this-is-mail nil nil)
 174     (message-this-is-news nil t))
 175  :variable-document
 176   "Alist of regexps and permitted unencoded charsets for posting.
 177 Each element of the alist has the form (TEST HEADER BODY-LIST), where
 178 TEST is either a regular expression matching the newsgroup header or a
 179 variable to query,
 180 HEADER is the charset which may be left unencoded in the header (nil
 181 means encode all charsets),
 182 BODY-LIST is a list of charsets which may be encoded using 8bit
 183 content-transfer encoding in the body, or one of the special values
 184 nil (always encode using quoted-printable) or t (always use 8bit).
 185
 186 Note that any value other than nil for HEADER infringes some RFCs, so
 187 use this option with care."
 188  :variable-group gnus-charset
 189  :variable-type
 190  '(repeat (list :tag "Permitted unencoded charsets"
 191                 (choice :tag "Where"
 192                         (regexp :tag "Group")
 193                         (const :tag "Mail message" :value message-this-is-mail)
 194                         (const :tag "News article" :value message-this-is-news))
 195                 (choice :tag "Header"
 196                         (const :tag "None" nil)
 197                         (symbol :tag "Charset"))
 198                 (choice :tag "Body"
 199                         (const :tag "Any" :value t)
 200                         (const :tag "None" :value nil)
 201                         (repeat :tag "Charsets"
 202                                 (symbol :tag "Charset")))))
 203  :parameter-type '(choice :tag "Permitted unencoded charsets"
 204                           :value nil
 205                           (repeat (symbol)))
 206  :parameter-document       "\
 207 List of charsets that are permitted to be unencoded.")
 208
 209 (defcustom gnus-debug-files
 210   '("gnus.el" "gnus-sum.el" "gnus-group.el"
 211     "gnus-art.el" "gnus-start.el" "gnus-async.el"
 212     "gnus-msg.el" "gnus-score.el" "gnus-win.el" "gnus-topic.el"
 213     "gnus-agent.el" "gnus-cache.el" "gnus-srvr.el"
 214     "mm-util.el" "mm-decode.el" "nnmail.el" "message.el")
 215   "Files whose variables will be reported in `gnus-bug'."
 216   :version "22.1"
 217   :group 'gnus-message
 218   :type '(repeat (string :tag "File")))
 219
 220 (defcustom gnus-debug-exclude-variables
 221   '(mm-mime-mule-charset-alist
 222     nnmail-split-fancy message-minibuffer-local-map)
 223   "Variables that should not be reported in `gnus-bug'."
 224   :version "22.1"
 225   :group 'gnus-message
 226   :type '(repeat (symbol :tag "Variable")))
 227
 228 (defcustom gnus-discouraged-post-methods
 229   '(nndraft nnml nnimap nnmaildir nnmh nnfolder nndir)
 230   "A list of back ends that are not used in \"real\" newsgroups.
 231 This variable is used only when `gnus-post-method' is `current'."
 232   :version "22.1"
 233   :group 'gnus-group-foreign
 234   :type '(repeat (symbol :tag "Back end")))
 235
 236 (defcustom gnus-message-replysign
 237   nil
 238   "Automatically sign replies to signed messages.
 239 See also the `mml-default-sign-method' variable."
 240   :group 'gnus-message
 241   :type 'boolean)
 242
 243 (defcustom gnus-message-replyencrypt
 244   nil
 245   "Automatically encrypt replies to encrypted messages.
 246 See also the `mml-default-encrypt-method' variable."
 247   :group 'gnus-message
 248   :type 'boolean)
 249
 250 (defcustom gnus-message-replysignencrypted
 251   t
 252   "Setting this causes automatically encrypted messages to also be signed."
 253   :group 'gnus-message
 254   :type 'boolean)
 255
 256 (defcustom gnus-confirm-mail-reply-to-news nil
 257   "If non-nil, Gnus requests confirmation when replying to news.
 258 This is done because new users often reply by mistake when reading
 259 news.
 260 This can also be a function receiving the group name as the only
 261 parameter which should return non-nil iff a confirmation is needed, or
 262 a regexp, in which case a confirmation is asked for iff the group name
 263 matches the regexp."
 264   :version "22.1"
 265   :group 'gnus-message
 266   :type '(choice (const :tag "No" nil)
 267                  (const :tag "Yes" t)
 268                  (regexp :tag "Iff group matches regexp")
 269                  (function :tag "Iff function evaluates to non-nil")))
 270
 271 (defcustom gnus-confirm-treat-mail-like-news
 272   nil
 273   "If non-nil, Gnus will treat mail like news with regard to confirmation
 274 when replying by mail.  See the `gnus-confirm-mail-reply-to-news' variable
 275 for fine-tuning this.
 276 If nil, Gnus will never ask for confirmation if replying to mail."
 277   :version "22.1"
 278   :group 'gnus-message
 279   :type 'boolean)
 280
 281 (defcustom gnus-summary-resend-default-address t
 282   "If non-nil, Gnus tries to suggest a default address to resend to.
 283 If nil, the address field will always be empty after invoking
 284 `gnus-summary-resend-message'."
 285   :version "22.1"
 286   :group 'gnus-message
 287   :type 'boolean)
 288
 289 ;;; Internal variables.
 290
 291 (defvar gnus-inhibit-posting-styles nil
 292   "Inhibit the use of posting styles.")
 293
 294 (defvar gnus-article-yanked-articles nil)
 295 (defvar gnus-message-buffer "*Mail Gnus*")
 296 (defvar gnus-article-copy nil)
 297 (defvar gnus-check-before-posting nil)
 298 (defvar gnus-last-posting-server nil)
 299 (defvar gnus-message-group-art nil)
 300
 301 (defvar gnus-msg-force-broken-reply-to nil)
 302
 303 (defconst gnus-bug-message
 304   "Sending a bug report to the Gnus Towers.
 305 ========================================
 306
 307 The buffer below is a mail buffer.  When you press `C-c C-c', it will
 308 be sent to the Gnus Bug Exterminators.
 309
 310 The thing near the bottom of the buffer is how the environment
 311 settings will be included in the mail.  Please do not delete that.
 312 They will tell the Bug People what your environment is, so that it
 313 will be easier to locate the bugs.
 314
 315 If you have found a bug that makes Emacs go \"beep\", set
 316 debug-on-error to t (`M-x set-variable RET debug-on-error RET t RET')
 317 and include the backtrace in your bug report.
 318
 319 Please describe the bug in annoying, painstaking detail.
 320
 321 Thank you for your help in stamping out bugs.
 322 ")
 323
 324 (eval-and-compile
 325   (autoload 'gnus-uu-post-news "gnus-uu" nil t)
 326   (autoload 'news-setup "rnewspost")
 327   (autoload 'news-reply-mode "rnewspost")
 328   (autoload 'rmail-dont-reply-to "mail-utils")
 329   (autoload 'rmail-output "rmailout"))
 330
 331 \f
 332 ;;;
 333 ;;; Gnus Posting Functions
 334 ;;;
 335
 336 (gnus-define-keys (gnus-summary-send-map "S" gnus-summary-mode-map)
 337   "p" gnus-summary-post-news
 338   "i" gnus-summary-news-other-window
 339   "f" gnus-summary-followup
 340   "F" gnus-summary-followup-with-original
 341   "c" gnus-summary-cancel-article
 342   "s" gnus-summary-supersede-article
 343   "r" gnus-summary-reply
 344   "y" gnus-summary-yank-message
 345   "R" gnus-summary-reply-with-original
 346   "w" gnus-summary-wide-reply
 347   "W" gnus-summary-wide-reply-with-original
 348   "v" gnus-summary-very-wide-reply
 349   "V" gnus-summary-very-wide-reply-with-original
 350   "n" gnus-summary-followup-to-mail
 351   "N" gnus-summary-followup-to-mail-with-original
 352   "m" gnus-summary-mail-other-window
 353   "u" gnus-uu-post-news
 354   "\M-c" gnus-summary-mail-crosspost-complaint
 355   "Br" gnus-summary-reply-broken-reply-to
 356   "BR" gnus-summary-reply-broken-reply-to-with-original
 357   "om" gnus-summary-mail-forward
 358   "op" gnus-summary-post-forward
 359   "Om" gnus-uu-digest-mail-forward
 360   "Op" gnus-uu-digest-post-forward)
 361
 362 (gnus-define-keys (gnus-send-bounce-map "D" gnus-summary-send-map)
 363   "b" gnus-summary-resend-bounced-mail
 364   ;; "c" gnus-summary-send-draft
 365   "r" gnus-summary-resend-message
 366   "e" gnus-summary-resend-message-edit)
 367
 368 ;;; Internal functions.
 369
 370 (defun gnus-inews-make-draft ()
 371   `(lambda ()
 372      (gnus-inews-make-draft-meta-information
 373       ,gnus-newsgroup-name ',gnus-article-reply)))
 374
 375 (defvar gnus-article-reply nil)
 376 (defmacro gnus-setup-message (config &rest forms)
 377   (let ((winconf (make-symbol "gnus-setup-message-winconf"))
 378         (buffer (make-symbol "gnus-setup-message-buffer"))
 379         (article (make-symbol "gnus-setup-message-article"))
 380         (yanked (make-symbol "gnus-setup-yanked-articles"))
 381         (group (make-symbol "gnus-setup-message-group")))
 382     `(let ((,winconf (current-window-configuration))
 383            (,buffer (buffer-name (current-buffer)))
 384            (,article gnus-article-reply)
 385            (,yanked gnus-article-yanked-articles)
 386            (,group gnus-newsgroup-name)
 387            (message-header-setup-hook
 388             (copy-sequence message-header-setup-hook))
 389            (mbl mml-buffer-list)
 390            (message-mode-hook (copy-sequence message-mode-hook)))
 391        (setq mml-buffer-list nil)
 392        (add-hook 'message-header-setup-hook 'gnus-inews-insert-gcc)
 393        (add-hook 'message-header-setup-hook 'gnus-inews-insert-archive-gcc)
 394        ;; #### FIXME: for a reason that I did not manage to identify yet,
 395        ;; the variable `gnus-newsgroup-name' does not honor a dynamically
 396        ;; scoped or setq'ed value from a caller like `C-u gnus-summary-mail'.
 397        ;; After evaluation of @forms below, it gets the value we actually want
 398        ;; to override, and the posting styles are used. For that reason, I've
 399        ;; added an optional argument to `gnus-configure-posting-styles' to
 400        ;; make sure that the correct value for the group name is used. -- drv
 401        (add-hook 'message-mode-hook
 402                  (if (memq ,config '(reply-yank reply))
 403                      (lambda ()
 404                        (gnus-configure-posting-styles ,group))
 405                    (lambda ()
 406                      ;; There may be an old " *gnus article copy*" buffer.
 407                      (let (gnus-article-copy)
 408                        (gnus-configure-posting-styles ,group)))))
 409        (gnus-pull ',(intern gnus-draft-meta-information-header)
 410                   message-required-headers)
 411        (when (and ,group
 412                   (not (string= ,group "")))
 413          (push (cons
 414                 (intern gnus-draft-meta-information-header)
 415                 (gnus-inews-make-draft))
 416                message-required-headers))
 417        (unwind-protect
 418            (progn
 419              ,@forms)
 420          (gnus-inews-add-send-actions ,winconf ,buffer ,article ,config
 421                                       ,yanked)
 422          (setq gnus-message-buffer (current-buffer))
 423          (set (make-local-variable 'gnus-message-group-art)
 424               (cons ,group ,article))
 425          (set (make-local-variable 'gnus-newsgroup-name) ,group)
 426          (gnus-run-hooks 'gnus-message-setup-hook)
 427          (if (eq major-mode 'message-mode)
 428              (let ((mbl1 mml-buffer-list))
 429                (setq mml-buffer-list mbl)  ;; Global value
 430                (set (make-local-variable 'mml-buffer-list) mbl1);; Local value
 431                (gnus-make-local-hook 'kill-buffer-hook)
 432                (gnus-make-local-hook 'change-major-mode-hook)
 433                (add-hook 'change-major-mode-hook 'mml-destroy-buffers nil t)
 434                (add-hook 'kill-buffer-hook 'mml-destroy-buffers t t))
 435            (mml-destroy-buffers)
 436            (setq mml-buffer-list mbl)))
 437        (message-hide-headers)
 438        (gnus-add-buffer)
 439        (gnus-configure-windows ,config t)
 440        (run-hooks 'post-command-hook)
 441        (set-buffer-modified-p nil))))
 442
 443 (defun gnus-inews-make-draft-meta-information (group article)
 444   (concat "(\"" group "\" "
 445           (if article (number-to-string
 446                        (if (listp article)
 447                            (car article)
 448                          article)) "\"\"")
 449           ")"))
 450
 451 ;;;###autoload
 452 (defun gnus-msg-mail (&optional to subject other-headers continue
 453                                 switch-action yank-action send-actions)
 454   "Start editing a mail message to be sent.
 455 Like `message-mail', but with Gnus paraphernalia, particularly the
 456 Gcc: header for archiving purposes."
 457   (interactive)
 458   (let ((buf (current-buffer))
 459         mail-buf)
 460     (gnus-setup-message 'message
 461       (message-mail to subject other-headers continue
 462                     nil yank-action send-actions))
 463     (when switch-action
 464       (setq mail-buf (current-buffer))
 465       (switch-to-buffer buf)
 466       (apply switch-action mail-buf nil)))
 467   ;; COMPOSEFUNC should return t if succeed.  Undocumented ???
 468   t)
 469
 470 ;;;###autoload
 471 (defun gnus-button-mailto (address)
 472   "Mail to ADDRESS."
 473   (set-buffer (gnus-copy-article-buffer))
 474   (gnus-setup-message 'message
 475     (message-reply address)))
 476
 477 ;;;###autoload
 478 (defun gnus-button-reply (&optional to-address wide)
 479   "Like `message-reply'."
 480   (interactive)
 481   (gnus-setup-message 'message
 482     (message-reply to-address wide)))
 483
 484 ;;;###autoload
 485 (define-mail-user-agent 'gnus-user-agent
 486   'gnus-msg-mail 'message-send-and-exit
 487   'message-kill-buffer 'message-send-hook)
 488
 489 (defun gnus-setup-posting-charset (group)
 490   (let ((alist gnus-group-posting-charset-alist)
 491         (group (or group ""))
 492         elem)
 493     (when group
 494       (catch 'found
 495         (while (setq elem (pop alist))
 496           (when (or (and (stringp (car elem))
 497                          (string-match (car elem) group))
 498                     (and (functionp (car elem))
 499                          (funcall (car elem) group))
 500                     (and (symbolp (car elem))
 501                          (symbol-value (car elem))))
 502             (throw 'found (cons (cadr elem) (caddr elem)))))))))
 503
 504 (defun gnus-inews-add-send-actions (winconf buffer article
 505                                             &optional config yanked)
 506   (gnus-make-local-hook 'message-sent-hook)
 507   (add-hook 'message-sent-hook (if gnus-agent 'gnus-agent-possibly-do-gcc
 508                                  'gnus-inews-do-gcc) nil t)
 509   (when gnus-agent
 510     (gnus-make-local-hook 'message-header-hook)
 511     (add-hook 'message-header-hook 'gnus-agent-possibly-save-gcc nil t))
 512   (setq message-post-method
 513         `(lambda (arg)
 514            (gnus-post-method arg ,gnus-newsgroup-name)))
 515   (setq message-newsreader (setq message-mailer (gnus-extended-version)))
 516   (message-add-action
 517    `(when (gnus-buffer-exists-p ,buffer)
 518       (set-window-configuration ,winconf))
 519    'exit 'postpone 'kill)
 520   (let ((to-be-marked (cond
 521                        (yanked
 522                         (mapcar
 523                          (lambda (x) (if (listp x) (car x) x)) yanked))
 524                        (article (if (listp article) article (list article)))
 525                        (t nil))))
 526     (message-add-action
 527      `(when (gnus-buffer-exists-p ,buffer)
 528         (save-excursion
 529           (set-buffer ,buffer)
 530           ,(when to-be-marked
 531              (if (eq config 'forward)
 532                  `(gnus-summary-mark-article-as-forwarded ',to-be-marked)
 533                `(gnus-summary-mark-article-as-replied ',to-be-marked)))))
 534      'send)))
 535
 536 (put 'gnus-setup-message 'lisp-indent-function 1)
 537 (put 'gnus-setup-message 'edebug-form-spec '(form body))
 538
 539 ;;; Post news commands of Gnus group mode and summary mode
 540
 541 (defun gnus-group-mail (&optional arg)
 542   "Start composing a mail.
 543 If ARG, use the group under the point to find a posting style.
 544 If ARG is 1, prompt for a group name to find the posting style."
 545   (interactive "P")
 546   ;; We can't `let' gnus-newsgroup-name here, since that leads
 547   ;; to local variables leaking.
 548   (let ((group gnus-newsgroup-name)
 549         ;; make sure last viewed article doesn't affect posting styles:
 550         (gnus-article-copy)
 551         (buffer (current-buffer)))
 552     (unwind-protect
 553         (progn
 554           (setq gnus-newsgroup-name
 555                 (if arg
 556                     (if (= 1 (prefix-numeric-value arg))
 557                         (completing-read "Use posting style of group: "
 558                                          gnus-active-hashtb nil
 559                                          (gnus-read-active-file-p))
 560                       (gnus-group-group-name))
 561                   ""))
 562           ;; #### see comment in gnus-setup-message -- drv
 563           (gnus-setup-message 'message (message-mail)))
 564       (save-excursion
 565         (set-buffer buffer)
 566         (setq gnus-newsgroup-name group)))))
 567
 568 (defun gnus-group-news (&optional arg)
 569   "Start composing a news.
 570 If ARG, post to group under point.
 571 If ARG is 1, prompt for group name to post to.
 572
 573 This function prepares a news even when using mail groups.  This is useful
 574 for posting messages to mail groups without actually sending them over the
 575 network.  The corresponding back end must have a 'request-post method."
 576   (interactive "P")
 577   ;; We can't `let' gnus-newsgroup-name here, since that leads
 578   ;; to local variables leaking.
 579   (let ((group gnus-newsgroup-name)
 580         ;; make sure last viewed article doesn't affect posting styles:
 581         (gnus-article-copy)
 582         (buffer (current-buffer)))
 583     (unwind-protect
 584         (progn
 585           (setq gnus-newsgroup-name
 586                 (if arg
 587                     (if (= 1 (prefix-numeric-value arg))
 588                         (completing-read "Use group: "
 589                                          gnus-active-hashtb nil
 590                                          (gnus-read-active-file-p))
 591                       (gnus-group-group-name))
 592                   ""))
 593           ;; #### see comment in gnus-setup-message -- drv
 594           (gnus-setup-message 'message
 595             (message-news (gnus-group-real-name gnus-newsgroup-name))))
 596       (save-excursion
 597         (set-buffer buffer)
 598         (setq gnus-newsgroup-name group)))))
 599
 600 (defun gnus-group-post-news (&optional arg)
 601   "Start composing a message (a news by default).
 602 If ARG, post to group under point.  If ARG is 1, prompt for group name.
 603 Depending on the selected group, the message might be either a mail or
 604 a news."
 605   (interactive "P")
 606   ;; Bind this variable here to make message mode hooks work ok.
 607   (let ((gnus-newsgroup-name
 608          (if arg
 609              (if (= 1 (prefix-numeric-value arg))
 610                  (completing-read "Newsgroup: " gnus-active-hashtb nil
 611                                   (gnus-read-active-file-p))
 612                (gnus-group-group-name))
 613            ""))
 614         ;; make sure last viewed article doesn't affect posting styles:
 615         (gnus-article-copy))
 616     (gnus-post-news 'post gnus-newsgroup-name nil nil nil nil
 617                     (string= gnus-newsgroup-name ""))))
 618
 619 (defun gnus-summary-mail-other-window (&optional arg)
 620   "Start composing a mail in another window.
 621 Use the posting of the current group by default.
 622 If ARG, don't do that.  If ARG is 1, prompt for group name to find the
 623 posting style."
 624   (interactive "P")
 625   ;; We can't `let' gnus-newsgroup-name here, since that leads
 626   ;; to local variables leaking.
 627   (let ((group gnus-newsgroup-name)
 628         ;; make sure last viewed article doesn't affect posting styles:
 629         (gnus-article-copy)
 630         (buffer (current-buffer)))
 631     (unwind-protect
 632         (progn
 633           (setq gnus-newsgroup-name
 634                 (if arg
 635                     (if (= 1 (prefix-numeric-value arg))
 636                         (completing-read "Use group: "
 637                                          gnus-active-hashtb nil
 638                                          (gnus-read-active-file-p))
 639                       "")
 640                   gnus-newsgroup-name))
 641           ;; #### see comment in gnus-setup-message -- drv
 642           (gnus-setup-message 'message (message-mail)))
 643       (save-excursion
 644         (set-buffer buffer)
 645         (setq gnus-newsgroup-name group)))))
 646
 647 (defun gnus-summary-news-other-window (&optional arg)
 648   "Start composing a news in another window.
 649 Post to the current group by default.
 650 If ARG, don't do that.  If ARG is 1, prompt for group name to post to.
 651
 652 This function prepares a news even when using mail groups.  This is useful
 653 for posting messages to mail groups without actually sending them over the
 654 network.  The corresponding back end must have a 'request-post method."
 655   (interactive "P")
 656   ;; We can't `let' gnus-newsgroup-name here, since that leads
 657   ;; to local variables leaking.
 658   (let ((group gnus-newsgroup-name)
 659         ;; make sure last viewed article doesn't affect posting styles:
 660         (gnus-article-copy)
 661         (buffer (current-buffer)))
 662     (unwind-protect
 663         (progn
 664           (setq gnus-newsgroup-name
 665                 (if arg
 666                     (if (= 1 (prefix-numeric-value arg))
 667                         (completing-read "Use group: "
 668                                          gnus-active-hashtb nil
 669                                          (gnus-read-active-file-p))
 670                       "")
 671                   gnus-newsgroup-name))
 672           ;; #### see comment in gnus-setup-message -- drv
 673           (gnus-setup-message 'message
 674             (progn
 675               (message-news (gnus-group-real-name gnus-newsgroup-name))
 676               (set (make-local-variable 'gnus-discouraged-post-methods)
 677                    (delq
 678                     (car (gnus-find-method-for-group gnus-newsgroup-name))
 679                     (copy-sequence gnus-discouraged-post-methods))))))
 680       (save-excursion
 681         (set-buffer buffer)
 682         (setq gnus-newsgroup-name group)))))
 683
 684 (defun gnus-summary-post-news (&optional arg)
 685   "Start composing a message.  Post to the current group by default.
 686 If ARG, don't do that.  If ARG is 1, prompt for a group name to post to.
 687 Depending on the selected group, the message might be either a mail or
 688 a news."
 689   (interactive "P")
 690   ;; Bind this variable here to make message mode hooks work ok.
 691   (let ((gnus-newsgroup-name
 692          (if arg
 693              (if (= 1 (prefix-numeric-value arg))
 694                  (completing-read "Newsgroup: " gnus-active-hashtb nil
 695                                   (gnus-read-active-file-p))
 696                "")
 697            gnus-newsgroup-name))
 698         ;; make sure last viewed article doesn't affect posting styles:
 699         (gnus-article-copy))
 700     (gnus-post-news 'post gnus-newsgroup-name)))
 701
 702
 703 (defun gnus-summary-followup (yank &optional force-news)
 704   "Compose a followup to an article.
 705 If prefix argument YANK is non-nil, the original article is yanked
 706 automatically.
 707 YANK is a list of elements, where the car of each element is the
 708 article number, and the cdr is the string to be yanked."
 709   (interactive
 710    (list (and current-prefix-arg
 711               (gnus-summary-work-articles 1))))
 712   (when yank
 713     (gnus-summary-goto-subject
 714      (if (listp (car yank))
 715          (caar yank)
 716        (car yank))))
 717   (save-window-excursion
 718     (gnus-summary-select-article))
 719   (let ((headers (gnus-summary-article-header (gnus-summary-article-number)))
 720         (gnus-newsgroup-name gnus-newsgroup-name))
 721     ;; Send a followup.
 722     (gnus-post-news nil gnus-newsgroup-name
 723                     headers gnus-article-buffer
 724                     yank nil force-news)
 725     (gnus-summary-handle-replysign)))
 726
 727 (defun gnus-summary-followup-with-original (n &optional force-news)
 728   "Compose a followup to an article and include the original article.
 729 The text in the region will be yanked.  If the region isn't
 730 active, the entire article will be yanked."
 731   (interactive "P")
 732   (gnus-summary-followup (gnus-summary-work-articles n) force-news))
 733
 734 (defun gnus-summary-followup-to-mail (&optional arg)
 735   "Followup to the current mail message via news."
 736   (interactive
 737    (list (and current-prefix-arg
 738               (gnus-summary-work-articles 1))))
 739   (gnus-summary-followup arg t))
 740
 741 (defun gnus-summary-followup-to-mail-with-original (&optional arg)
 742   "Followup to the current mail message via news."
 743   (interactive "P")
 744   (gnus-summary-followup (gnus-summary-work-articles arg) t))
 745
 746 (defun gnus-inews-yank-articles (articles)
 747   (let (beg article yank-string)
 748     (message-goto-body)
 749     (while (setq article (pop articles))
 750       (when (listp article)
 751         (setq yank-string (nth 1 article)
 752               article (nth 0 article)))
 753       (save-window-excursion
 754         (set-buffer gnus-summary-buffer)
 755         (gnus-summary-select-article nil nil nil article)
 756         (gnus-summary-remove-process-mark article))
 757       (gnus-copy-article-buffer nil yank-string)
 758       (let ((message-reply-buffer gnus-article-copy)
 759             (message-reply-headers
 760              ;; The headers are decoded.
 761              (with-current-buffer gnus-article-copy
 762                (save-restriction
 763                  (nnheader-narrow-to-headers)
 764                  (nnheader-parse-naked-head)))))
 765         (message-yank-original)
 766         (setq beg (or beg (mark t))))
 767       (when articles
 768         (insert "\n")))
 769     (push-mark)
 770     (goto-char beg)))
 771
 772 (defun gnus-summary-cancel-article (&optional n symp)
 773   "Cancel an article you posted.
 774 Uses the process-prefix convention.  If given the symbolic
 775 prefix `a', cancel using the standard posting method; if not
 776 post using the current select method."
 777   (interactive (gnus-interactive "P\ny"))
 778   (let ((articles (gnus-summary-work-articles n))
 779         (message-post-method
 780          `(lambda (arg)
 781             (gnus-post-method (eq ',symp 'a) ,gnus-newsgroup-name)))
 782         article)
 783     (while (setq article (pop articles))
 784       (when (gnus-summary-select-article t nil nil article)
 785         (when (gnus-eval-in-buffer-window gnus-original-article-buffer
 786                 (message-cancel-news))
 787           (gnus-summary-mark-as-read article gnus-canceled-mark)
 788           (gnus-cache-remove-article 1))
 789         (gnus-article-hide-headers-if-wanted))
 790       (gnus-summary-remove-process-mark article))))
 791
 792 (defun gnus-summary-supersede-article ()
 793   "Compose an article that will supersede a previous article.
 794 This is done simply by taking the old article and adding a Supersedes
 795 header line with the old Message-ID."
 796   (interactive)
 797   (let ((article (gnus-summary-article-number)))
 798     (gnus-setup-message 'reply-yank
 799       (gnus-summary-select-article t)
 800       (set-buffer gnus-original-article-buffer)
 801       (message-supersede)
 802       (push
 803        `((lambda ()
 804            (when (gnus-buffer-exists-p ,gnus-summary-buffer)
 805              (save-excursion
 806                (set-buffer ,gnus-summary-buffer)
 807                (gnus-cache-possibly-remove-article ,article nil nil nil t)
 808                (gnus-summary-mark-as-read ,article gnus-canceled-mark)))))
 809        message-send-actions))))
 810
 811 \f
 812
 813 (defun gnus-copy-article-buffer (&optional article-buffer yank-string)
 814   ;; make a copy of the article buffer with all text properties removed
 815   ;; this copy is in the buffer gnus-article-copy.
 816   ;; if ARTICLE-BUFFER is nil, gnus-article-buffer is used
 817   ;; this buffer should be passed to all mail/news reply/post routines.
 818   (setq gnus-article-copy (gnus-get-buffer-create " *gnus article copy*"))
 819   (save-excursion
 820     (set-buffer gnus-article-copy)
 821     (mm-enable-multibyte))
 822   (let ((article-buffer (or article-buffer gnus-article-buffer))
 823         end beg)
 824     (if (not (and (get-buffer article-buffer)
 825                   (gnus-buffer-exists-p article-buffer)))
 826         (error "Can't find any article buffer")
 827       (save-excursion
 828         (set-buffer article-buffer)
 829         (let ((gnus-newsgroup-charset (or gnus-article-charset
 830                                           gnus-newsgroup-charset))
 831               (gnus-newsgroup-ignored-charsets
 832                (or gnus-article-ignored-charsets
 833                    gnus-newsgroup-ignored-charsets)))
 834           (save-restriction
 835             ;; Copy over the (displayed) article buffer, delete
 836             ;; hidden text and remove text properties.
 837             (widen)
 838             (copy-to-buffer gnus-article-copy (point-min) (point-max))
 839             (set-buffer gnus-article-copy)
 840             (when yank-string
 841               (message-goto-body)
 842               (delete-region (point) (point-max))
 843               (insert yank-string))
 844             (gnus-article-delete-text-of-type 'annotation)
 845             (gnus-remove-text-with-property 'gnus-prev)
 846             (gnus-remove-text-with-property 'gnus-next)
 847             (gnus-remove-text-with-property 'gnus-decoration)
 848             (insert
 849              (prog1
 850                  (buffer-substring-no-properties (point-min) (point-max))
 851                (erase-buffer)))
 852             ;; Find the original headers.
 853             (set-buffer gnus-original-article-buffer)
 854             (goto-char (point-min))
 855             (while (looking-at message-unix-mail-delimiter)
 856               (forward-line 1))
 857             (let ((mail-header-separator ""))
 858               (setq beg (point)
 859                     end (or (message-goto-body)
 860                             ;; There may be just a header.
 861                             (point-max))))
 862             ;; Delete the headers from the displayed articles.
 863             (set-buffer gnus-article-copy)
 864             (let ((mail-header-separator ""))
 865               (delete-region (goto-char (point-min))
 866                              (or (message-goto-body) (point-max))))
 867             ;; Insert the original article headers.
 868             (insert-buffer-substring gnus-original-article-buffer beg end)
 869             ;; Decode charsets.
 870             (let ((gnus-article-decode-hook
 871                    (delq 'article-decode-charset
 872                          (copy-sequence gnus-article-decode-hook)))
 873                   (rfc2047-quote-decoded-words-containing-tspecials t))
 874               (run-hooks 'gnus-article-decode-hook)))))
 875       gnus-article-copy)))
 876
 877 (defun gnus-post-news (post &optional group header article-buffer yank subject
 878                             force-news)
 879   (when article-buffer
 880     (gnus-copy-article-buffer))
 881   (let ((gnus-article-reply (and article-buffer (gnus-summary-article-number)))
 882         (gnus-article-yanked-articles yank)
 883         (add-to-list gnus-add-to-list))
 884     (gnus-setup-message (cond (yank 'reply-yank)
 885                               (article-buffer 'reply)
 886                               (t 'message))
 887       (let* ((group (or group gnus-newsgroup-name))
 888              (charset (gnus-group-name-charset nil group))
 889              (pgroup group)
 890              to-address to-group mailing-list to-list
 891              newsgroup-p)
 892         (when group
 893           (setq to-address (gnus-parameter-to-address group)
 894                 to-group (gnus-group-find-parameter group 'to-group)
 895                 to-list (gnus-parameter-to-list group)
 896                 newsgroup-p (gnus-group-find-parameter group 'newsgroup)
 897                 mailing-list (when gnus-mailing-list-groups
 898                                (string-match gnus-mailing-list-groups group))
 899                 group (gnus-group-name-decode (gnus-group-real-name group)
 900                                               charset)))
 901         (if (or (and to-group
 902                      (gnus-news-group-p to-group))
 903                 newsgroup-p
 904                 force-news
 905                 (and (gnus-news-group-p
 906                       (or pgroup gnus-newsgroup-name)
 907                       (or header gnus-current-article))
 908                      (not mailing-list)
 909                      (not to-list)
 910                      (not to-address)))
 911             ;; This is news.
 912             (if post
 913                 (message-news
 914                  (or to-group
 915                      (and (not (gnus-virtual-group-p pgroup)) group)))
 916               (set-buffer gnus-article-copy)
 917               (gnus-msg-treat-broken-reply-to)
 918               (message-followup (if (or newsgroup-p force-news)
 919                                     (if (save-restriction
 920                                           (article-narrow-to-head)
 921                                           (message-fetch-field "newsgroups"))
 922                                         nil
 923                                       "")
 924                                   to-group)))
 925           ;; The is mail.
 926           (if post
 927               (progn
 928                 (message-mail (or to-address to-list))
 929                 ;; Arrange for mail groups that have no `to-address' to
 930                 ;; get that when the user sends off the mail.
 931                 (when (and (not to-list)
 932                            (not to-address)
 933                            add-to-list)
 934                   (push (list 'gnus-inews-add-to-address pgroup)
 935                         message-send-actions)))
 936             (set-buffer gnus-article-copy)
 937             (gnus-msg-treat-broken-reply-to)
 938             (message-wide-reply to-address)))
 939         (when yank
 940           (gnus-inews-yank-articles yank))))))
 941
 942 (defun gnus-msg-treat-broken-reply-to (&optional force)
 943   "Remove the Reply-to header if broken-reply-to."
 944   (when (or force
 945             (gnus-group-find-parameter
 946              gnus-newsgroup-name 'broken-reply-to))
 947     (save-restriction
 948       (message-narrow-to-head)
 949       (message-remove-header "reply-to"))))
 950
 951 (defun gnus-post-method (arg group &optional silent)
 952   "Return the posting method based on GROUP and ARG.
 953 If SILENT, don't prompt the user."
 954   (let ((gnus-post-method (or (gnus-parameter-post-method group)
 955                               gnus-post-method))
 956         (group-method (gnus-find-method-for-group group)))
 957     (cond
 958      ;; If the group-method is nil (which shouldn't happen) we use
 959      ;; the default method.
 960      ((null group-method)
 961       (or (and (listp gnus-post-method) ;If not current/native/nil
 962                (not (listp (car gnus-post-method))) ; and not a list of methods
 963                gnus-post-method)        ;then use it.
 964           gnus-select-method
 965           message-post-method))
 966      ;; We want the inverse of the default
 967      ((and arg (not (eq arg 0)))
 968       (if (eq gnus-post-method 'current)
 969           gnus-select-method
 970         group-method))
 971      ;; We query the user for a post method.
 972      ((or arg
 973           (and (listp gnus-post-method)
 974                (listp (car gnus-post-method))))
 975       (let* ((methods
 976               ;; Collect all methods we know about.
 977               (append
 978                (when (listp gnus-post-method)
 979                  (if (listp (car gnus-post-method))
 980                      gnus-post-method
 981                    (list gnus-post-method)))
 982                gnus-secondary-select-methods
 983                (mapcar 'cdr gnus-server-alist)
 984                (mapcar 'car gnus-opened-servers)
 985                (list gnus-select-method)
 986                (list group-method)))
 987              method-alist post-methods method)
 988         ;; Weed out all mail methods.
 989         (while methods
 990           (setq method (gnus-server-get-method "" (pop methods)))
 991           (when (and (or (gnus-method-option-p method 'post)
 992                          (gnus-method-option-p method 'post-mail))
 993                      (not (member method post-methods)))
 994             (push method post-methods)))
 995         ;; Create a name-method alist.
 996         (setq method-alist
 997               (mapcar
 998                (lambda (m)
 999                  (if (equal (cadr m) "")
1000                      (list (symbol-name (car m)) m)
1001                    (list (concat (cadr m) " (" (symbol-name (car m)) ")") m)))
1002                post-methods))
1003         ;; Query the user.
1004         (cadr
1005          (assoc
1006           (setq gnus-last-posting-server
1007                 (if (and silent
1008                          gnus-last-posting-server)
1009                     ;; Just use the last value.
1010                     gnus-last-posting-server
1011                   (completing-read
1012                    "Posting method: " method-alist nil t
1013                    (cons (or gnus-last-posting-server "") 0))))
1014           method-alist))))
1015      ;; Override normal method.
1016      ((and (eq gnus-post-method 'current)
1017            (not (memq (car group-method) gnus-discouraged-post-methods))
1018            (gnus-get-function group-method 'request-post t))
1019       (assert (not arg))
1020       group-method)
1021      ;; Use gnus-post-method.
1022      ((listp gnus-post-method)          ;A method...
1023       (assert (not (listp (car gnus-post-method)))) ;... not a list of methods.
1024       gnus-post-method)
1025      ;; Use the normal select method (nil or native).
1026      (t gnus-select-method))))
1027
1028 \f
1029
1030 (defun gnus-extended-version ()
1031   "Stringified Gnus version and Emacs version.
1032 See the variable `gnus-user-agent'."
1033   (interactive)
1034   (let* ((float-output-format nil)
1035          (gnus-v
1036           (concat "Gnus/"
1037                   (prin1-to-string (gnus-continuum-version gnus-version) t)
1038                   " (" gnus-version ")"))
1039          (emacs-v (gnus-emacs-version)))
1040     (if (stringp gnus-user-agent)
1041         gnus-user-agent
1042       (concat gnus-v
1043               (when emacs-v
1044                 (concat " " emacs-v))))))
1045
1046 \f
1047 ;;;
1048 ;;; Gnus Mail Functions
1049 ;;;
1050
1051 ;;; Mail reply commands of Gnus summary mode
1052
1053 (defun gnus-summary-reply (&optional yank wide very-wide)
1054   "Start composing a mail reply to the current message.
1055 If prefix argument YANK is non-nil, the original article is yanked
1056 automatically.
1057 If WIDE, make a wide reply.
1058 If VERY-WIDE, make a very wide reply."
1059   (interactive
1060    (list (and current-prefix-arg
1061               (gnus-summary-work-articles 1))))
1062   ;; Allow user to require confirmation before replying by mail to the
1063   ;; author of a news article (or mail message).
1064   (when (or
1065             (not (or (gnus-news-group-p gnus-newsgroup-name)
1066                      gnus-confirm-treat-mail-like-news))
1067             (not (cond ((stringp gnus-confirm-mail-reply-to-news)
1068                         (string-match gnus-confirm-mail-reply-to-news
1069                                       gnus-newsgroup-name))
1070                        ((functionp gnus-confirm-mail-reply-to-news)
1071                         (funcall gnus-confirm-mail-reply-to-news gnus-newsgroup-name))
1072                        (t gnus-confirm-mail-reply-to-news)))
1073             (y-or-n-p "Really reply by mail to article author? "))
1074     (let* ((article
1075             (if (listp (car yank))
1076                 (caar yank)
1077               (car yank)))
1078            (gnus-article-reply (or article (gnus-summary-article-number)))
1079            (gnus-article-yanked-articles yank)
1080            (headers ""))
1081       ;; Stripping headers should be specified with mail-yank-ignored-headers.
1082       (when yank
1083         (gnus-summary-goto-subject article))
1084       (gnus-setup-message (if yank 'reply-yank 'reply)
1085         (if (not very-wide)
1086             (gnus-summary-select-article)
1087           (dolist (article very-wide)
1088             (gnus-summary-select-article nil nil nil article)
1089             (save-excursion
1090               (set-buffer (gnus-copy-article-buffer))
1091               (gnus-msg-treat-broken-reply-to)
1092               (save-restriction
1093                 (message-narrow-to-head)
1094                 (setq headers (concat headers (buffer-string)))))))
1095         (set-buffer (gnus-copy-article-buffer))
1096         (gnus-msg-treat-broken-reply-to gnus-msg-force-broken-reply-to)
1097         (save-restriction
1098           (message-narrow-to-head)
1099           (when very-wide
1100             (erase-buffer)
1101             (insert headers))
1102           (goto-char (point-max)))
1103         (mml-quote-region (point) (point-max))
1104         (message-reply nil wide)
1105         (when yank
1106           (gnus-inews-yank-articles yank))
1107         (gnus-summary-handle-replysign)))))
1108
1109 (defun gnus-summary-handle-replysign ()
1110   "Check the various replysign variables and take action accordingly."
1111   (when (or gnus-message-replysign gnus-message-replyencrypt)
1112     (let (signed encrypted)
1113       (save-excursion
1114         (set-buffer gnus-article-buffer)
1115         (setq signed (memq 'signed gnus-article-wash-types))
1116         (setq encrypted (memq 'encrypted gnus-article-wash-types)))
1117       (cond ((and gnus-message-replyencrypt encrypted)
1118              (mml-secure-message mml-default-encrypt-method
1119                                  (if gnus-message-replysignencrypted
1120                                      'signencrypt
1121                                    'encrypt)))
1122             ((and gnus-message-replysign signed)
1123              (mml-secure-message mml-default-sign-method 'sign))))))
1124
1125 (defun gnus-summary-reply-with-original (n &optional wide)
1126   "Start composing a reply mail to the current message.
1127 The original article will be yanked."
1128   (interactive "P")
1129   (gnus-summary-reply (gnus-summary-work-articles n) wide))
1130
1131 (defun gnus-summary-reply-broken-reply-to (&optional yank wide very-wide)
1132   "Like `gnus-summary-reply' except removing reply-to field.
1133 If prefix argument YANK is non-nil, the original article is yanked
1134 automatically.
1135 If WIDE, make a wide reply.
1136 If VERY-WIDE, make a very wide reply."
1137   (interactive
1138    (list (and current-prefix-arg
1139               (gnus-summary-work-articles 1))))
1140   (let ((gnus-msg-force-broken-reply-to t))
1141     (gnus-summary-reply yank wide very-wide)))
1142
1143 (defun gnus-summary-reply-broken-reply-to-with-original (n &optional wide)
1144   "Like `gnus-summary-reply-with-original' except removing reply-to field.
1145 The original article will be yanked."
1146   (interactive "P")
1147   (gnus-summary-reply-broken-reply-to (gnus-summary-work-articles n) wide))
1148
1149 (defun gnus-summary-wide-reply (&optional yank)
1150   "Start composing a wide reply mail to the current message.
1151 If prefix argument YANK is non-nil, the original article is yanked
1152 automatically."
1153   (interactive
1154    (list (and current-prefix-arg
1155               (gnus-summary-work-articles 1))))
1156   (gnus-summary-reply yank t))
1157
1158 (defun gnus-summary-wide-reply-with-original (n)
1159   "Start composing a wide reply mail to the current message.
1160 The original article will be yanked.
1161 Uses the process/prefix convention."
1162   (interactive "P")
1163   (gnus-summary-reply-with-original n t))
1164
1165 (defun gnus-summary-very-wide-reply (&optional yank)
1166   "Start composing a very wide reply mail to the current message.
1167 If prefix argument YANK is non-nil, the original article is yanked
1168 automatically."
1169   (interactive
1170    (list (and current-prefix-arg
1171               (gnus-summary-work-articles 1))))
1172   (gnus-summary-reply yank t (gnus-summary-work-articles yank)))
1173
1174 (defun gnus-summary-very-wide-reply-with-original (n)
1175   "Start composing a very wide reply mail to the current message.
1176 The original article will be yanked."
1177   (interactive "P")
1178   (gnus-summary-reply
1179    (gnus-summary-work-articles n) t (gnus-summary-work-articles n)))
1180
1181 (defun gnus-summary-mail-forward (&optional arg post)
1182   "Forward the current message(s) to another user.
1183 If process marks exist, forward all marked messages;
1184 if ARG is nil, see `message-forward-as-mime' and `message-forward-show-mml';
1185 if ARG is 1, decode the message and forward directly inline;
1186 if ARG is 2, forward message as an rfc822 MIME section;
1187 if ARG is 3, decode message and forward as an rfc822 MIME section;
1188 if ARG is 4, forward message directly inline;
1189 otherwise, use flipped `message-forward-as-mime'.
1190 If POST, post instead of mail.
1191 For the `inline' alternatives, also see the variable
1192 `message-forward-ignored-headers'."
1193   (interactive "P")
1194   (if (cdr (gnus-summary-work-articles nil))
1195       ;; Process marks are given.
1196       (gnus-uu-digest-mail-forward arg post)
1197     ;; No process marks.
1198     (let ((message-forward-as-mime message-forward-as-mime)
1199           (message-forward-show-mml message-forward-show-mml))
1200       (cond
1201        ((null arg))
1202        ((eq arg 1)
1203         (setq message-forward-as-mime nil
1204               message-forward-show-mml t))
1205        ((eq arg 2)
1206         (setq message-forward-as-mime t
1207               message-forward-show-mml nil))
1208        ((eq arg 3)
1209         (setq message-forward-as-mime t
1210               message-forward-show-mml t))
1211        ((eq arg 4)
1212         (setq message-forward-as-mime nil
1213               message-forward-show-mml nil))
1214        (t
1215         (setq message-forward-as-mime (not message-forward-as-mime))))
1216       (let* ((gnus-article-reply (gnus-summary-article-number))
1217              (gnus-article-yanked-articles (list gnus-article-reply)))
1218         (gnus-setup-message 'forward
1219           (gnus-summary-select-article)
1220           (let ((mail-parse-charset
1221                  (or (and (gnus-buffer-live-p gnus-article-buffer)
1222                           (with-current-buffer gnus-article-buffer
1223                             gnus-article-charset))
1224                      gnus-newsgroup-charset))
1225                 (mail-parse-ignored-charsets
1226                  gnus-newsgroup-ignored-charsets))
1227             (set-buffer gnus-original-article-buffer)
1228             (message-forward post)))))))
1229
1230 (defun gnus-summary-resend-message (address n)
1231   "Resend the current article to ADDRESS."
1232   (interactive
1233    (list (message-read-from-minibuffer
1234           "Resend message(s) to: "
1235           (when (and gnus-summary-resend-default-address
1236                      (gnus-buffer-live-p gnus-original-article-buffer))
1237             ;; If some other article is currently selected, the
1238             ;; initial-contents is wrong. Whatever, it is just the
1239             ;; initial-contents.
1240             (with-current-buffer gnus-original-article-buffer
1241               (nnmail-fetch-field "to"))))
1242          current-prefix-arg))
1243   (let ((articles (gnus-summary-work-articles n))
1244         article)
1245     (while (setq article (pop articles))
1246       (gnus-summary-select-article nil nil nil article)
1247       (save-excursion
1248         (set-buffer gnus-original-article-buffer)
1249         (message-resend address))
1250       (gnus-summary-mark-article-as-forwarded article))))
1251
1252 ;; From: Matthieu Moy <Matthieu.Moy@imag.fr>
1253 (defun gnus-summary-resend-message-edit ()
1254   "Resend an article that has already been sent.
1255 A new buffer will be created to allow the user to modify body and
1256 contents of the message, and then, everything will happen as when
1257 composing a new message."
1258   (interactive)
1259   (let ((article (gnus-summary-article-number)))
1260     (gnus-setup-message 'reply-yank
1261       (gnus-summary-select-article t)
1262       (set-buffer gnus-original-article-buffer)
1263       (let ((cur (current-buffer))
1264             (to (message-fetch-field "to")))
1265         ;; Get a normal message buffer.
1266         (message-pop-to-buffer (message-buffer-name "Resend" to))
1267         (insert-buffer-substring cur)
1268         (mime-to-mml)
1269         (message-narrow-to-head-1)
1270         ;; Gnus will generate a new one when sending.
1271         (message-remove-header "Message-ID")
1272         (message-remove-header message-ignored-resent-headers t)
1273         ;; Remove unwanted headers.
1274         (goto-char (point-max))
1275         (insert mail-header-separator)
1276         (goto-char (point-min))
1277         (when (re-search-forward "^To:\\|^Newsgroups:" nil 'move)
1278           (forward-char 1))
1279         (widen)))))
1280
1281 (defun gnus-summary-post-forward (&optional arg)
1282   "Forward the current article to a newsgroup.
1283 See `gnus-summary-mail-forward' for ARG."
1284   (interactive "P")
1285   (gnus-summary-mail-forward arg t))
1286
1287 (defvar gnus-nastygram-message
1288   "The following article was inappropriately posted to %s.\n\n"
1289   "Format string to insert in nastygrams.
1290 The current group name will be inserted at \"%s\".")
1291
1292 (defun gnus-summary-mail-nastygram (n)
1293   "Send a nastygram to the author of the current article."
1294   (interactive "P")
1295   (when (or gnus-expert-user
1296             (gnus-y-or-n-p
1297              "Really send a nastygram to the author of the current article? "))
1298     (let ((group gnus-newsgroup-name))
1299       (gnus-summary-reply-with-original n)
1300       (set-buffer gnus-message-buffer)
1301       (message-goto-body)
1302       (insert (format gnus-nastygram-message group))
1303       (message-send-and-exit))))
1304
1305 (defun gnus-summary-mail-crosspost-complaint (n)
1306   "Send a complaint about crossposting to the current article(s)."
1307   (interactive "P")
1308   (let ((articles (gnus-summary-work-articles n))
1309         article)
1310     (while (setq article (pop articles))
1311       (set-buffer gnus-summary-buffer)
1312       (gnus-summary-goto-subject article)
1313       (let ((group (gnus-group-real-name gnus-newsgroup-name))
1314             newsgroups followup-to)
1315         (gnus-summary-select-article)
1316         (set-buffer gnus-original-article-buffer)
1317         (if (and (<= (length (message-tokenize-header
1318                               (setq newsgroups
1319                                     (mail-fetch-field "newsgroups"))
1320                               ", "))
1321                      1)
1322                  (or (not (setq followup-to (mail-fetch-field "followup-to")))
1323                      (not (member group (message-tokenize-header
1324                                          followup-to ", ")))))
1325             (if followup-to
1326                 (gnus-message 1 "Followup-to restricted")
1327               (gnus-message 1 "Not a crossposted article"))
1328           (set-buffer gnus-summary-buffer)
1329           (gnus-summary-reply-with-original 1)
1330           (set-buffer gnus-message-buffer)
1331           (message-goto-body)
1332           (insert (format gnus-crosspost-complaint newsgroups group))
1333           (message-goto-subject)
1334           (re-search-forward " *$")
1335           (replace-match " (crosspost notification)" t t)
1336           (gnus-deactivate-mark)
1337           (when (gnus-y-or-n-p "Send this complaint? ")
1338             (message-send-and-exit)))))))
1339
1340 (defun gnus-mail-parse-comma-list ()
1341   (let (accumulated
1342         beg)
1343     (skip-chars-forward " ")
1344     (while (not (eobp))
1345       (setq beg (point))
1346       (skip-chars-forward "^,")
1347       (while (zerop
1348               (save-excursion
1349                 (save-restriction
1350                   (let ((i 0))
1351                     (narrow-to-region beg (point))
1352                     (goto-char beg)
1353                     (logand (progn
1354                               (while (search-forward "\"" nil t)
1355                                 (incf i))
1356                               (if (zerop i) 2 i))
1357                             2)))))
1358         (skip-chars-forward ",")
1359         (skip-chars-forward "^,"))
1360       (skip-chars-backward " ")
1361       (push (buffer-substring beg (point))
1362             accumulated)
1363       (skip-chars-forward "^,")
1364       (skip-chars-forward ", "))
1365     accumulated))
1366
1367 (defun gnus-inews-add-to-address (group)
1368   (let ((to-address (mail-fetch-field "to")))
1369     (when (and to-address
1370                (gnus-alive-p))
1371       ;; This mail group doesn't have a `to-list', so we add one
1372       ;; here.  Magic!
1373       (when (gnus-y-or-n-p
1374              (format "Do you want to add this as `to-list': %s? " to-address))
1375         (gnus-group-add-parameter group (cons 'to-list to-address))))))
1376
1377 (defun gnus-put-message ()
1378   "Put the current message in some group and return to Gnus."
1379   (interactive)
1380   (let ((reply gnus-article-reply)
1381         (winconf gnus-prev-winconf)
1382         (group gnus-newsgroup-name))
1383     (unless (and group
1384                  (not (gnus-group-read-only-p group)))
1385       (setq group (read-string "Put in group: " nil (gnus-writable-groups))))
1386
1387     (when (gnus-gethash group gnus-newsrc-hashtb)
1388       (error "No such group: %s" group))
1389     (save-excursion
1390       (save-restriction
1391         (widen)
1392         (message-narrow-to-headers)
1393         (let ((gnus-deletable-headers nil))
1394           (message-generate-headers
1395            (if (message-news-p)
1396                message-required-news-headers
1397              message-required-mail-headers)))
1398         (goto-char (point-max))
1399         (if (string-match " " group)
1400             (insert "Gcc: \"" group "\"\n")
1401           (insert "Gcc: " group "\n"))
1402         (widen)))
1403     (gnus-inews-do-gcc)
1404     (when (and (get-buffer gnus-group-buffer)
1405                (gnus-buffer-exists-p (car-safe reply))
1406                (cdr reply))
1407       (set-buffer (car reply))
1408       (gnus-summary-mark-article-as-replied (cdr reply)))
1409     (when winconf
1410       (set-window-configuration winconf))))
1411
1412 (defun gnus-article-mail (yank)
1413   "Send a reply to the address near point.
1414 If YANK is non-nil, include the original article."
1415   (interactive "P")
1416   (let ((address
1417          (buffer-substring
1418           (save-excursion (re-search-backward "[ \t\n]" nil t) (1+ (point)))
1419           (save-excursion (re-search-forward "[ \t\n]" nil t) (1- (point))))))
1420     (when address
1421       (gnus-msg-mail address)
1422       (when yank
1423         (gnus-inews-yank-articles (list (cdr gnus-article-current)))))))
1424
1425 (defvar nntp-server-type)
1426 (defun gnus-bug ()
1427   "Send a bug report to the Gnus maintainers."
1428   (interactive)
1429   (unless (gnus-alive-p)
1430     (error "Gnus has been shut down"))
1431   (gnus-setup-message (if (message-mail-user-agent) 'message 'bug)
1432     (unless (message-mail-user-agent)
1433       (delete-other-windows)
1434       (when gnus-bug-create-help-buffer
1435         (switch-to-buffer "*Gnus Help Bug*")
1436         (erase-buffer)
1437         (insert gnus-bug-message)
1438         (goto-char (point-min)))
1439       (message-pop-to-buffer "*Gnus Bug*"))
1440     (let ((message-this-is-mail t))
1441       (message-setup `((To . ,gnus-maintainer) (Subject . ""))))
1442     (when gnus-bug-create-help-buffer
1443       (push `(gnus-bug-kill-buffer) message-send-actions))
1444     (goto-char (point-min))
1445     (re-search-forward (concat "^" (regexp-quote mail-header-separator) "$"))
1446     (forward-line 1)
1447     (insert (gnus-version) "\n"
1448             (emacs-version) "\n")
1449     (when (and (boundp 'nntp-server-type)
1450                (stringp nntp-server-type))
1451       (insert nntp-server-type))
1452     (insert "\n\n\n\n\n")
1453     (let (text)
1454       (save-excursion
1455         (set-buffer (gnus-get-buffer-create " *gnus environment info*"))
1456         (erase-buffer)
1457         (gnus-debug)
1458         (setq text (buffer-string)))
1459       (insert "<#part type=application/emacs-lisp disposition=inline description=\"User settings\">\n" text "\n<#/part>"))
1460     (goto-char (point-min))
1461     (search-forward "Subject: " nil t)
1462     (message "")))
1463
1464 (defun gnus-bug-kill-buffer ()
1465   (when (get-buffer "*Gnus Help Bug*")
1466     (kill-buffer "*Gnus Help Bug*")))
1467
1468 (defun gnus-summary-yank-message (buffer n)
1469   "Yank the current article into a composed message."
1470   (interactive
1471    (list (completing-read "Buffer: " (mapcar 'list (message-buffers)) nil t)
1472          current-prefix-arg))
1473   (gnus-summary-iterate n
1474     (let ((gnus-inhibit-treatment t))
1475       (gnus-summary-select-article))
1476     (save-excursion
1477       (set-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     (save-excursion
1491       (set-buffer (gnus-get-buffer-create " *gnus bug info*"))
1492       (while files
1493         (erase-buffer)
1494         (when (and (setq file (locate-library (pop files)))
1495                    (file-exists-p file))
1496           (insert-file-contents file)
1497           (goto-char (point-min))
1498           (if (not (re-search-forward "^;;* *Internal variables" nil t))
1499               (gnus-message 4 "Malformed sources in file %s" file)
1500             (narrow-to-region (point-min) (point))
1501             (goto-char (point-min))
1502             (while (setq expr (ignore-errors (read (current-buffer))))
1503               (ignore-errors
1504                 (and (or (eq (car expr) 'defvar)
1505                          (eq (car expr) 'defcustom))
1506                      (stringp (nth 3 expr))
1507                      (not (memq (nth 1 expr) gnus-debug-exclude-variables))
1508                      (or (not (boundp (nth 1 expr)))
1509                          (not (equal (eval (nth 2 expr))
1510                                      (symbol-value (nth 1 expr)))))
1511                      (push (nth 1 expr) olist)))))))
1512       (kill-buffer (current-buffer)))
1513     (when (setq olist (nreverse olist))
1514       (insert "------------------ Environment follows ------------------\n\n"))
1515     (while olist
1516       (if (boundp (car olist))
1517           (ignore-errors
1518            (gnus-pp
1519             `(setq ,(car olist)
1520                    ,(if (or (consp (setq sym (symbol-value (car olist))))
1521                             (and (symbolp sym)
1522                                  (not (or (eq sym nil)
1523                                           (eq sym t)))))
1524                         (list 'quote (symbol-value (car olist)))
1525                       (symbol-value (car olist))))))
1526         (insert ";; (makeunbound '" (symbol-name (car olist)) ")\n"))
1527       (setq olist (cdr olist)))
1528     (insert "\n\n")
1529     ;; Remove any control chars - they seem to cause trouble for some
1530     ;; mailers.  (Byte-compiled output from the stuff above.)
1531     (goto-char point)
1532     (while (re-search-forward (mm-string-as-multibyte
1533                                "[\000-\010\013-\037\200-\237]") nil t)
1534       (replace-match (format "\\%03o" (string-to-char (match-string 0)))
1535                      t t))))
1536
1537 ;;; Treatment of rejected articles.
1538 ;;; Bounced mail.
1539
1540 (defun gnus-summary-resend-bounced-mail (&optional fetch)
1541   "Re-mail the current message.
1542 This only makes sense if the current message is a bounce message that
1543 contains some mail you have written which has been bounced back to
1544 you.
1545 If FETCH, try to fetch the article that this is a reply to, if indeed
1546 this is a reply."
1547   (interactive "P")
1548   (gnus-summary-select-article t)
1549   (set-buffer gnus-original-article-buffer)
1550   (gnus-setup-message 'compose-bounce
1551     (let* ((references (mail-fetch-field "references"))
1552            (parent (and references (gnus-parent-id references))))
1553       (message-bounce)
1554       ;; If there are references, we fetch the article we answered to.
1555       (and fetch parent
1556            (gnus-summary-refer-article parent)
1557            (gnus-summary-show-all-headers)))))
1558
1559 ;;; Gcc handling.
1560
1561 (defun gnus-inews-group-method (group)
1562   (cond
1563    ;; If the group doesn't exist, we assume
1564    ;; it's an archive group...
1565    ((and (null (gnus-get-info group))
1566          (eq (car (gnus-server-to-method gnus-message-archive-method))
1567              (car (gnus-server-to-method (gnus-group-method group)))))
1568     gnus-message-archive-method)
1569    ;; Use the method.
1570    ((gnus-info-method (gnus-get-info group))
1571     (gnus-info-method (gnus-get-info group)))
1572    ;; Find the method.
1573    (t (gnus-server-to-method (gnus-group-method group)))))
1574
1575 ;; Do Gcc handling, which copied the message over to some group.
1576 (defun gnus-inews-do-gcc (&optional gcc)
1577   (interactive)
1578   (save-excursion
1579     (save-restriction
1580       (message-narrow-to-headers)
1581       (let ((gcc (or gcc (mail-fetch-field "gcc" nil t)))
1582             (cur (current-buffer))
1583             groups group method group-art
1584             mml-externalize-attachments)
1585         (when gcc
1586           (message-remove-header "gcc")
1587           (widen)
1588           (setq groups (message-unquote-tokens
1589                         (message-tokenize-header gcc " ,")))
1590           ;; Copy the article over to some group(s).
1591           (while (setq group (pop groups))
1592             (unless (gnus-check-server
1593                      (setq method (gnus-inews-group-method group)))
1594               (error "Can't open server %s" (if (stringp method) method
1595                                               (car method))))
1596             (unless (gnus-request-group group nil method)
1597               (gnus-request-create-group group method))
1598             (setq mml-externalize-attachments
1599                   (if (stringp gnus-gcc-externalize-attachments)
1600                       (string-match gnus-gcc-externalize-attachments group)
1601                     gnus-gcc-externalize-attachments))
1602             (save-excursion
1603               (nnheader-set-temp-buffer " *acc*")
1604               (insert-buffer-substring cur)
1605               (message-encode-message-body)
1606               (save-restriction
1607                 (message-narrow-to-headers)
1608                 (let* ((mail-parse-charset message-default-charset)
1609                        (newsgroups-field (save-restriction
1610                                            (message-narrow-to-headers-or-head)
1611                                            (message-fetch-field "Newsgroups")))
1612                        (followup-field (save-restriction
1613                                          (message-narrow-to-headers-or-head)
1614                                          (message-fetch-field "Followup-To")))
1615                        ;; BUG: We really need to get the charset for
1616                        ;; each name in the Newsgroups and Followup-To
1617                        ;; lines to allow crossposting between group
1618                        ;; namess with incompatible character sets.
1619                        ;; -- Per Abrahamsen <abraham@dina.kvl.dk> 2001-10-08.
1620                        (group-field-charset
1621                         (gnus-group-name-charset
1622                          method (or newsgroups-field "")))
1623                        (followup-field-charset
1624                         (gnus-group-name-charset
1625                          method (or followup-field "")))
1626                        (rfc2047-header-encoding-alist
1627                         (append
1628                          (when group-field-charset
1629                            (list (cons "Newsgroups" group-field-charset)))
1630                          (when followup-field-charset
1631                            (list (cons "Followup-To" followup-field-charset)))
1632                          rfc2047-header-encoding-alist)))
1633                   (mail-encode-encoded-word-buffer)))
1634               (goto-char (point-min))
1635               (when (re-search-forward
1636                      (concat "^" (regexp-quote mail-header-separator) "$")
1637                      nil t)
1638                 (replace-match "" t t ))
1639               (unless (setq group-art
1640                             (gnus-request-accept-article group method t t))
1641                 (gnus-message 1 "Couldn't store article in group %s: %s"
1642                               group (gnus-status-message method))
1643                 (sit-for 2))
1644               (when (and group-art
1645                          ;; FIXME: Should gcc-mark-as-read work when
1646                          ;; Gnus is not running?
1647                          (gnus-alive-p)
1648                          (or gnus-gcc-mark-as-read
1649                              (and
1650                               (boundp 'gnus-inews-mark-gcc-as-read)
1651                               (symbol-value 'gnus-inews-mark-gcc-as-read))))
1652                 (gnus-group-mark-article-read group (cdr group-art)))
1653               (kill-buffer (current-buffer)))))))))
1654
1655 (defun gnus-inews-insert-gcc ()
1656   "Insert Gcc headers based on `gnus-outgoing-message-group'."
1657   (save-excursion
1658     (save-restriction
1659       (message-narrow-to-headers)
1660       (let* ((group gnus-outgoing-message-group)
1661              (gcc (cond
1662                    ((functionp group)
1663                     (funcall group))
1664                    ((or (stringp group) (list group))
1665                     group))))
1666         (when gcc
1667           (insert "Gcc: "
1668                   (if (stringp gcc)
1669                       (if (string-match " " gcc)
1670                           (concat "\"" gcc "\"")
1671                         gcc)
1672                     (mapconcat (lambda (group)
1673                                  (if (string-match " " group)
1674                                      (concat "\"" group "\"")
1675                                    group))
1676                                gcc " "))
1677                   "\n"))))))
1678
1679 (defun gnus-inews-insert-archive-gcc (&optional group)
1680   "Insert the Gcc to say where the article is to be archived."
1681   (let* ((var gnus-message-archive-group)
1682          (group (or group gnus-newsgroup-name ""))
1683          (gcc-self-val
1684           (and gnus-newsgroup-name
1685                (not (equal gnus-newsgroup-name ""))
1686                (gnus-group-find-parameter
1687                 gnus-newsgroup-name 'gcc-self)))
1688          result
1689          (groups
1690           (cond
1691            ((null gnus-message-archive-method)
1692             ;; Ignore.
1693             nil)
1694            ((stringp var)
1695             ;; Just a single group.
1696             (list var))
1697            ((null var)
1698             ;; We don't want this.
1699             nil)
1700            ((and (listp var) (stringp (car var)))
1701             ;; A list of groups.
1702             var)
1703            ((functionp var)
1704             ;; A function.
1705             (funcall var group))
1706            (t
1707             ;; An alist of regexps/functions/forms.
1708             (while (and var
1709                         (not
1710                          (setq result
1711                                (cond
1712                                 ((stringp (caar var))
1713                                  ;; Regexp.
1714                                  (when (string-match (caar var) group)
1715                                    (cdar var)))
1716                                 ((functionp (car var))
1717                                  ;; Function.
1718                                  (funcall (car var) group))
1719                                 (t
1720                                  (eval (car var)))))))
1721               (setq var (cdr var)))
1722             result)))
1723          name)
1724     (when (or groups gcc-self-val)
1725       (when (stringp groups)
1726         (setq groups (list groups)))
1727       (save-excursion
1728         (save-restriction
1729           (message-narrow-to-headers)
1730           (goto-char (point-max))
1731           (insert "Gcc: ")
1732           (if gcc-self-val
1733               ;; Use the `gcc-self' param value instead.
1734               (progn
1735                 (insert
1736                  (if (stringp gcc-self-val)
1737                      (if (string-match " " gcc-self-val)
1738                          (concat "\"" gcc-self-val "\"")
1739                        gcc-self-val)
1740                    ;; In nndoc groups, we use the parent group name
1741                    ;; instead of the current group.
1742                    (let ((group (or (gnus-group-find-parameter
1743                                      gnus-newsgroup-name 'parent-group)
1744                                     group)))
1745                      (if (string-match " " group)
1746                          (concat "\"" group "\"")
1747                        group))))
1748                 (if (not (eq gcc-self-val 'none))
1749                     (insert "\n")
1750                   (gnus-delete-line)))
1751             ;; Use the list of groups.
1752             (while (setq name (pop groups))
1753               (let ((str (if (string-match ":" name)
1754                              name
1755                            (gnus-group-prefixed-name
1756                             name gnus-message-archive-method))))
1757                 (insert (if (string-match " " str)
1758                             (concat "\"" str "\"")
1759                           str)))
1760               (when groups
1761                 (insert " ")))
1762             (insert "\n")))))))
1763
1764 (defun gnus-mailing-list-followup-to ()
1765   "Look at the headers in the current buffer and return a Mail-Followup-To address."
1766   (let ((x-been-there (gnus-fetch-original-field "x-beenthere"))
1767         (list-post (gnus-fetch-original-field "list-post")))
1768     (when (and list-post
1769                (string-match "mailto:\\([^>]+\\)" list-post))
1770       (setq list-post (match-string 1 list-post)))
1771     (or list-post
1772         x-been-there)))
1773
1774 ;;; Posting styles.
1775
1776 (defun gnus-configure-posting-styles (&optional group-name)
1777   "Configure posting styles according to `gnus-posting-styles'."
1778   (unless gnus-inhibit-posting-styles
1779     (let ((group (or group-name gnus-newsgroup-name ""))
1780           (styles gnus-posting-styles)
1781           style match attribute value v results
1782           filep name address element)
1783       ;; If the group has a posting-style parameter, add it at the end with a
1784       ;; regexp matching everything, to be sure it takes precedence over all
1785       ;; the others.
1786       (when gnus-newsgroup-name
1787         (let ((tmp-style (gnus-group-find-parameter group 'posting-style t)))
1788           (when tmp-style
1789             (setq styles (append styles (list (cons ".*" tmp-style)))))))
1790       ;; Go through all styles and look for matches.
1791       (dolist (style styles)
1792         (setq match (pop style))
1793         (goto-char (point-min))
1794         (when (cond
1795                ((stringp match)
1796                 ;; Regexp string match on the group name.
1797                 (string-match match group))
1798                ((eq match 'header)
1799                 ;; Obsolete format of header match.
1800                 (and (gnus-buffer-live-p gnus-article-copy)
1801                      (with-current-buffer gnus-article-copy
1802                        (save-restriction
1803                          (nnheader-narrow-to-headers)
1804                          (let ((header (message-fetch-field (pop style))))
1805                            (and header
1806                                 (string-match (pop style) header)))))))
1807                ((or (symbolp match)
1808                     (functionp match))
1809                 (cond
1810                  ((functionp match)
1811                   ;; Function to be called.
1812                   (funcall match))
1813                  ((boundp match)
1814                   ;; Variable to be checked.
1815                   (symbol-value match))))
1816                ((listp match)
1817                 (cond
1818                  ((eq (car match) 'header)
1819                   ;; New format of header match.
1820                   (and (gnus-buffer-live-p gnus-article-copy)
1821                        (with-current-buffer gnus-article-copy
1822                          (save-restriction
1823                            (nnheader-narrow-to-headers)
1824                            (let ((header (message-fetch-field (nth 1 match))))
1825                              (and header
1826                                   (string-match (nth 2 match) header)))))))
1827                  (t
1828                   ;; This is a form to be evaled.
1829                   (eval match)))))
1830           ;; We have a match, so we set the variables.
1831           (dolist (attribute style)
1832             (setq element (pop attribute)
1833                   filep nil)
1834             (setq value
1835                   (cond
1836                    ((eq (car attribute) :file)
1837                     (setq filep t)
1838                     (cadr attribute))
1839                    ((eq (car attribute) :value)
1840                     (cadr attribute))
1841                    (t
1842                     (car attribute))))
1843             ;; We get the value.
1844             (setq v
1845                   (cond
1846                    ((stringp value)
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             ;; Get the contents of file elems.
1865             (when (and filep v)
1866               (setq v (with-temp-buffer
1867                         (insert-file-contents v)
1868                         (buffer-substring
1869                          (point-min)
1870                          (progn
1871                            (goto-char (point-max))
1872                            (if (zerop (skip-chars-backward "\n"))
1873                                (point)
1874                              (1+ (point))))))))
1875             (setq results (delq (assoc element results) results))
1876             (push (cons element v) results))))
1877       ;; Now we have all the styles, so we insert them.
1878       (setq name (assq 'name results)
1879             address (assq 'address results))
1880       (setq results (delq name (delq address results)))
1881       (gnus-make-local-hook 'message-setup-hook)
1882       (setq results (sort results (lambda (x y)
1883                                     (string-lessp (car x) (car y)))))
1884       (dolist (result results)
1885         (add-hook 'message-setup-hook
1886                   (cond
1887                    ((eq 'eval (car result))
1888                     'ignore)
1889                    ((eq 'body (car result))
1890                     `(lambda ()
1891                        (save-excursion
1892                          (message-goto-body)
1893                          (insert ,(cdr result)))))
1894                    ((eq 'signature (car result))
1895                     (set (make-local-variable 'message-signature) nil)
1896                     (set (make-local-variable 'message-signature-file) nil)
1897                     (if (not (cdr result))
1898                         'ignore
1899                       `(lambda ()
1900                          (save-excursion
1901                            (let ((message-signature ,(cdr result)))
1902                              (when message-signature
1903                                (message-insert-signature)))))))
1904                    (t
1905                     (let ((header
1906                            (if (symbolp (car result))
1907                                (capitalize (symbol-name (car result)))
1908                              (car result))))
1909                       `(lambda ()
1910                          (save-excursion
1911                            (message-remove-header ,header)
1912                            (let ((value ,(cdr result)))
1913                              (when value
1914                                (message-goto-eoh)
1915                                (insert ,header ": " value)
1916                                (unless (bolp)
1917                                  (insert "\n")))))))))
1918                   nil 'local))
1919       (when (or name address)
1920         (add-hook 'message-setup-hook
1921                   `(lambda ()
1922                      (set (make-local-variable 'user-mail-address)
1923                           ,(or (cdr address) user-mail-address))
1924                      (let ((user-full-name ,(or (cdr name) (user-full-name)))
1925                            (user-mail-address
1926                             ,(or (cdr address) user-mail-address)))
1927                        (save-excursion
1928                          (message-remove-header "From")
1929                          (message-goto-eoh)
1930                          (insert "From: " (message-make-from) "\n"))))
1931                   nil 'local)))))
1932
1933 ;;; Allow redefinition of functions.
1934
1935 (gnus-ems-redefine)
1936
1937 (provide 'gnus-msg)
1938
1939 ;;; arch-tag: 9f22b2f5-1c0a-49de-916e-4c88e984852b
1940 ;;; gnus-msg.el ends here