lisp/gnus/gnus-art.el

   1 ;;; gnus-art.el --- article mode commands for Gnus
   2
   3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   5
   6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   7 ;; Keywords: news
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 ;; For Emacs < 22.2.
  29 (eval-and-compile
  30   (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
  31 (eval-when-compile
  32   (require 'cl))
  33 (defvar tool-bar-map)
  34 (defvar w3m-minor-mode-map)
  35
  36 (require 'gnus)
  37 ;; Avoid the "Recursive load suspected" error in Emacs 21.1.
  38 (eval-and-compile
  39   (let ((recursive-load-depth-limit 100))
  40     (require 'gnus-sum)))
  41 (require 'gnus-spec)
  42 (require 'gnus-int)
  43 (require 'gnus-win)
  44 (require 'mm-bodies)
  45 (require 'mail-parse)
  46 (require 'mm-decode)
  47 (require 'mm-view)
  48 (require 'wid-edit)
  49 (require 'mm-uu)
  50 (require 'message)
  51
  52 (autoload 'gnus-msg-mail "gnus-msg" nil t)
  53 (autoload 'gnus-button-mailto "gnus-msg")
  54 (autoload 'gnus-button-reply "gnus-msg" nil t)
  55 (autoload 'parse-time-string "parse-time" nil nil)
  56 (autoload 'ansi-color-apply-on-region "ansi-color")
  57 (autoload 'mm-url-insert-file-contents-external "mm-url")
  58 (autoload 'mm-extern-cache-contents "mm-extern")
  59
  60 (defgroup gnus-article nil
  61   "Article display."
  62   :link '(custom-manual "(gnus)Article Buffer")
  63   :group 'gnus)
  64
  65 (defgroup gnus-article-treat nil
  66   "Treating article parts."
  67   :link '(custom-manual "(gnus)Article Hiding")
  68   :group 'gnus-article)
  69
  70 (defgroup gnus-article-hiding nil
  71   "Hiding article parts."
  72   :link '(custom-manual "(gnus)Article Hiding")
  73   :group 'gnus-article)
  74
  75 (defgroup gnus-article-highlight nil
  76   "Article highlighting."
  77   :link '(custom-manual "(gnus)Article Highlighting")
  78   :group 'gnus-article
  79   :group 'gnus-visual)
  80
  81 (defgroup gnus-article-signature nil
  82   "Article signatures."
  83   :link '(custom-manual "(gnus)Article Signature")
  84   :group 'gnus-article)
  85
  86 (defgroup gnus-article-headers nil
  87   "Article headers."
  88   :link '(custom-manual "(gnus)Hiding Headers")
  89   :group 'gnus-article)
  90
  91 (defgroup gnus-article-washing nil
  92   "Special commands on articles."
  93   :link '(custom-manual "(gnus)Article Washing")
  94   :group 'gnus-article)
  95
  96 (defgroup gnus-article-emphasis nil
  97   "Fontisizing articles."
  98   :link '(custom-manual "(gnus)Article Fontisizing")
  99   :group 'gnus-article)
 100
 101 (defgroup gnus-article-saving nil
 102   "Saving articles."
 103   :link '(custom-manual "(gnus)Saving Articles")
 104   :group 'gnus-article)
 105
 106 (defgroup gnus-article-mime nil
 107   "Worshiping the MIME wonder."
 108   :link '(custom-manual "(gnus)Using MIME")
 109   :group 'gnus-article)
 110
 111 (defgroup gnus-article-buttons nil
 112   "Pushable buttons in the article buffer."
 113   :link '(custom-manual "(gnus)Article Buttons")
 114   :group 'gnus-article)
 115
 116 (defgroup gnus-article-various nil
 117   "Other article options."
 118   :link '(custom-manual "(gnus)Misc Article")
 119   :group 'gnus-article)
 120
 121 (defcustom gnus-ignored-headers
 122   (mapcar
 123    (lambda (header)
 124      (concat "^" header ":"))
 125    '("Path" "Expires" "Date-Received" "References" "Xref" "Lines"
 126      "Relay-Version" "Message-ID" "Approved" "Sender" "Received"
 127      "X-UIDL" "MIME-Version" "Return-Path" "In-Reply-To"
 128      "Content-Type" "Content-Transfer-Encoding" "X-WebTV-Signature"
 129      "X-MimeOLE" "X-MSMail-Priority" "X-Priority" "X-Loop"
 130      "X-Authentication-Warning" "X-MIME-Autoconverted" "X-Face"
 131      "X-Attribution" "X-Originating-IP" "Delivered-To"
 132      "NNTP-[-A-Za-z]+" "Distribution" "X-no-archive" "X-Trace"
 133      "X-Complaints-To" "X-NNTP-Posting-Host" "X-Orig.*"
 134      "Abuse-Reports-To" "Cache-Post-Path" "X-Article-Creation-Date"
 135      "X-Poster" "X-Mail2News-Path" "X-Server-Date" "X-Cache"
 136      "Originator" "X-Problems-To" "X-Auth-User" "X-Post-Time"
 137      "X-Admin" "X-UID" "Resent-[-A-Za-z]+" "X-Mailing-List"
 138      "Precedence" "Original-[-A-Za-z]+" "X-filename" "X-Orcpt"
 139      "Old-Received" "X-Pgp" "X-Auth" "X-From-Line"
 140      "X-Gnus-Article-Number" "X-Majordomo" "X-Url" "X-Sender"
 141      "MBOX-Line" "Priority" "X400-[-A-Za-z]+"
 142      "Status" "X-Gnus-Mail-Source" "Cancel-Lock"
 143      "X-FTN" "X-EXP32-SerialNo" "Encoding" "Importance"
 144      "Autoforwarded" "Original-Encoded-Information-Types" "X-Ya-Pop3"
 145      "X-Face-Version" "X-Vms-To" "X-ML-NAME" "X-ML-COUNT"
 146      "Mailing-List" "X-finfo" "X-md5sum" "X-md5sum-Origin"
 147      "X-Sun-Charset" "X-Accept-Language" "X-Envelope-Sender"
 148      "List-[A-Za-z]+" "X-Listprocessor-Version"
 149      "X-Received" "X-Distribute" "X-Sequence" "X-Juno-Line-Breaks"
 150      "X-Notes-Item" "X-MS-TNEF-Correlator" "x-uunet-gateway"
 151      "X-Received" "Content-length" "X-precedence"
 152      "X-Authenticated-User" "X-Comment" "X-Report" "X-Abuse-Info"
 153      "X-HTTP-Proxy" "X-Mydeja-Info" "X-Copyright" "X-No-Markup"
 154      "X-Abuse-Info" "X-From_" "X-Accept-Language" "Errors-To"
 155      "X-BeenThere" "X-Mailman-Version" "List-Help" "List-Post"
 156      "List-Subscribe" "List-Id" "List-Unsubscribe" "List-Archive"
 157      "X-Content-length" "X-Posting-Agent" "Original-Received"
 158      "X-Request-PGP" "X-Fingerprint" "X-WRIEnvto" "X-WRIEnvfrom"
 159      "X-Virus-Scanned" "X-Delivery-Agent" "Posted-Date" "X-Gateway"
 160      "X-Local-Origin" "X-Local-Destination" "X-UserInfo1"
 161      "X-Received-Date" "X-Hashcash" "Face" "X-DMCA-Notifications"
 162      "X-Abuse-and-DMCA-Info" "X-Postfilter" "X-Gpg-.*" "X-Disclaimer"
 163      "Envelope-To" "X-Spam-Score" "System-Type" "X-Injected-Via-Gmane"
 164      "X-Gmane-NNTP-Posting-Host" "Jabber-ID" "Archived-At"
 165      "Envelope-Sender" "Envelope-Recipients"))
 166   "*All headers that start with this regexp will be hidden.
 167 This variable can also be a list of regexps of headers to be ignored.
 168 If `gnus-visible-headers' is non-nil, this variable will be ignored."
 169   :type '(choice :custom-show nil
 170                  regexp
 171                  (repeat regexp))
 172   :group 'gnus-article-hiding)
 173
 174 (defcustom gnus-visible-headers
 175   "^From:\\|^Newsgroups:\\|^Subject:\\|^Date:\\|^Followup-To:\\|^Reply-To:\\|^Organization:\\|^Summary:\\|^Keywords:\\|^To:\\|^[BGF]?Cc:\\|^Posted-To:\\|^Mail-Copies-To:\\|^Mail-Followup-To:\\|^Apparently-To:\\|^Gnus-Warning:\\|^Resent-From:\\|^X-Sent:"
 176   "*All headers that do not match this regexp will be hidden.
 177 This variable can also be a list of regexp of headers to remain visible.
 178 If this variable is non-nil, `gnus-ignored-headers' will be ignored."
 179   :type '(choice
 180           (repeat :value-to-internal (lambda (widget value)
 181                                        (custom-split-regexp-maybe value))
 182                   :match (lambda (widget value)
 183                            (or (stringp value)
 184                                (widget-editable-list-match widget value)))
 185                   regexp)
 186           (const :tag "Use gnus-ignored-headers" nil)
 187           regexp)
 188   :group 'gnus-article-hiding)
 189
 190 (defcustom gnus-sorted-header-list
 191   '("^From:" "^Subject:" "^Summary:" "^Keywords:" "^Newsgroups:"
 192     "^Followup-To:" "^To:" "^Cc:" "^Date:" "^Organization:")
 193   "*This variable is a list of regular expressions.
 194 If it is non-nil, headers that match the regular expressions will
 195 be placed first in the article buffer in the sequence specified by
 196 this list."
 197   :type '(repeat regexp)
 198   :group 'gnus-article-hiding)
 199
 200 (defcustom gnus-boring-article-headers '(empty followup-to reply-to)
 201   "Headers that are only to be displayed if they have interesting data.
 202 Possible values in this list are:
 203
 204   'empty       Headers with no content.
 205   'newsgroups  Newsgroup identical to Gnus group.
 206   'to-address  To identical to To-address.
 207   'to-list     To identical to To-list.
 208   'cc-list     CC identical to To-list.
 209   'followup-to Followup-to identical to Newsgroups.
 210   'reply-to    Reply-to identical to From.
 211   'date        Date less than four days old.
 212   'long-to     To and/or Cc longer than 1024 characters.
 213   'many-to     Multiple To and/or Cc."
 214   :type '(set (const :tag "Headers with no content." empty)
 215               (const :tag "Newsgroups identical to Gnus group." newsgroups)
 216               (const :tag "To identical to To-address." to-address)
 217               (const :tag "To identical to To-list." to-list)
 218               (const :tag "CC identical to To-list." cc-list)
 219               (const :tag "Followup-to identical to Newsgroups." followup-to)
 220               (const :tag "Reply-to identical to From." reply-to)
 221               (const :tag "Date less than four days old." date)
 222               (const :tag "To and/or Cc longer than 1024 characters." long-to)
 223               (const :tag "Multiple To and/or Cc headers." many-to))
 224   :group 'gnus-article-hiding)
 225
 226 (defcustom gnus-article-skip-boring nil
 227   "Skip over text that is not worth reading.
 228 By default, if you set this t, then Gnus will display citations and
 229 signatures, but will never scroll down to show you a page consisting
 230 only of boring text.  Boring text is controlled by
 231 `gnus-article-boring-faces'."
 232   :version "22.1"
 233   :type 'boolean
 234   :group 'gnus-article-hiding)
 235
 236 (defcustom gnus-signature-separator '("^-- $" "^-- *$")
 237   "Regexp matching signature separator.
 238 This can also be a list of regexps.  In that case, it will be checked
 239 from head to tail looking for a separator.  Searches will be done from
 240 the end of the buffer."
 241   :type '(choice :format "%{%t%}: %[Value Menu%]\n%v"
 242                  (regexp)
 243                  (repeat :tag "List of regexp" regexp))
 244   :group 'gnus-article-signature)
 245
 246 (defcustom gnus-signature-limit nil
 247   "Provide a limit to what is considered a signature.
 248 If it is a number, no signature may not be longer (in characters) than
 249 that number.  If it is a floating point number, no signature may be
 250 longer (in lines) than that number.  If it is a function, the function
 251 will be called without any parameters, and if it returns nil, there is
 252 no signature in the buffer.  If it is a string, it will be used as a
 253 regexp.  If it matches, the text in question is not a signature.
 254
 255 This can also be a list of the above values."
 256   :type '(choice (const nil)
 257                  (integer :value 200)
 258                  (number :value 4.0)
 259                  function
 260                  (regexp :value ".*"))
 261   :group 'gnus-article-signature)
 262
 263 (defcustom gnus-hidden-properties '(invisible t intangible t)
 264   "Property list to use for hiding text."
 265   :type 'sexp
 266   :group 'gnus-article-hiding)
 267
 268 ;; Fixme: This isn't the right thing for mixed graphical and non-graphical
 269 ;; frames in a session.
 270 (defcustom gnus-article-x-face-command
 271   (if (featurep 'xemacs)
 272       (if (or (gnus-image-type-available-p 'xface)
 273               (gnus-image-type-available-p 'pbm))
 274           'gnus-display-x-face-in-from
 275         "{ echo '/* Width=48, Height=48 */'; uncompface; } | icontopbm | ee -")
 276     (if (gnus-image-type-available-p 'pbm)
 277         'gnus-display-x-face-in-from
 278       "{ echo '/* Width=48, Height=48 */'; uncompface; } | icontopbm | \
 279 display -"))
 280   "*String or function to be executed to display an X-Face header.
 281 If it is a string, the command will be executed in a sub-shell
 282 asynchronously.  The compressed face will be piped to this command."
 283   :type `(choice string
 284                  (function-item gnus-display-x-face-in-from)
 285                  function)
 286   :version "21.1"
 287   :group 'gnus-picon
 288   :group 'gnus-article-washing)
 289
 290 (defcustom gnus-article-x-face-too-ugly nil
 291   "Regexp matching posters whose face shouldn't be shown automatically."
 292   :type '(choice regexp (const nil))
 293   :group 'gnus-article-washing)
 294
 295 (defcustom gnus-article-banner-alist nil
 296   "Banner alist for stripping.
 297 For example,
 298      ((egroups . \"^[ \\t\\n]*-------------------+\\\\( \\\\(e\\\\|Yahoo! \\\\)Groups Sponsor -+\\\\)?....\\n\\\\(.+\\n\\\\)+\"))"
 299   :version "21.1"
 300   :type '(repeat (cons symbol regexp))
 301   :group 'gnus-article-washing)
 302
 303 (gnus-define-group-parameter
 304  banner
 305  :variable-document
 306  "Alist of regexps (to match group names) and banner."
 307  :variable-group gnus-article-washing
 308  :parameter-type
 309  '(choice :tag "Banner"
 310           :value nil
 311           (const :tag "Remove signature" signature)
 312           (symbol :tag "Item in `gnus-article-banner-alist'" none)
 313           regexp
 314           (const :tag "None" nil))
 315  :parameter-document
 316  "If non-nil, specify how to remove `banners' from articles.
 317
 318 Symbol `signature' means to remove signatures delimited by
 319 `gnus-signature-separator'.  Any other symbol is used to look up a
 320 regular expression to match the banner in `gnus-article-banner-alist'.
 321 A string is used as a regular expression to match the banner
 322 directly.")
 323
 324 (defcustom gnus-article-address-banner-alist nil
 325   "Alist of mail addresses and banners.
 326 Each element has the form (ADDRESS . BANNER), where ADDRESS is a regexp
 327 to match a mail address in the From: header, BANNER is one of a symbol
 328 `signature', an item in `gnus-article-banner-alist', a regexp and nil.
 329 If ADDRESS matches author's mail address, it will remove things like
 330 advertisements.  For example:
 331
 332 \((\"@yoo-hoo\\\\.co\\\\.jp\\\\'\" . \"\\n_+\\nDo You Yoo-hoo!\\\\?\\n.*\\n.*\\n\"))
 333 "
 334   :type '(repeat
 335           (cons
 336            (regexp :tag "Address")
 337            (choice :tag "Banner" :value nil
 338                    (const :tag "Remove signature" signature)
 339                    (symbol :tag "Item in `gnus-article-banner-alist'" none)
 340                    regexp
 341                    (const :tag "None" nil))))
 342   :version "22.1"
 343   :group 'gnus-article-washing)
 344
 345 (defmacro gnus-emphasis-custom-with-format (&rest body)
 346   `(let ((format "\
 347 \\(\\s-\\|^\\|\\=\\|[-\"]\\|\\s(\\)\\(%s\\(\\w+\\(\\s-+\\w+\\)*[.,]?\\)%s\\)\
 348 \\(\\([-,.;:!?\"]\\|\\s)\\)+\\s-\\|[?!.]\\s-\\|\\s)\\|\\s-\\)"))
 349      ,@body))
 350
 351 (defun gnus-emphasis-custom-value-to-external (value)
 352   (gnus-emphasis-custom-with-format
 353    (if (consp (car value))
 354        (list (format format (car (car value)) (cdr (car value)))
 355              2
 356              (if (nth 1 value) 2 3)
 357              (nth 2 value))
 358      value)))
 359
 360 (defun gnus-emphasis-custom-value-to-internal (value)
 361   (gnus-emphasis-custom-with-format
 362    (let ((regexp (concat "\\`"
 363                          (format (regexp-quote format)
 364                                  "\\([^()]+\\)" "\\([^()]+\\)")
 365                          "\\'"))
 366          pattern)
 367      (if (string-match regexp (setq pattern (car value)))
 368          (list (cons (match-string 1 pattern) (match-string 2 pattern))
 369                (= (nth 2 value) 2)
 370                (nth 3 value))
 371        value))))
 372
 373 (defcustom gnus-emphasis-alist
 374   (let ((types
 375          '(("\\*" "\\*" bold nil 2)
 376            ("_" "_" underline)
 377            ("/" "/" italic)
 378            ("_/" "/_" underline-italic)
 379            ("_\\*" "\\*_" underline-bold)
 380            ("\\*/" "/\\*" bold-italic)
 381            ("_\\*/" "/\\*_" underline-bold-italic))))
 382     (nconc
 383      (gnus-emphasis-custom-with-format
 384       (mapcar (lambda (spec)
 385                 (list (format format (car spec) (cadr spec))
 386                       (or (nth 3 spec) 2)
 387                       (or (nth 4 spec) 3)
 388                       (intern (format "gnus-emphasis-%s" (nth 2 spec)))))
 389               types))
 390      '(;; I've never seen anyone use this strikethru convention whereas I've
 391        ;; several times seen it triggered by normal text.  --Stef
 392        ;; Miles suggests that this form is sometimes used but for italics,
 393        ;; so maybe we should map it to `italic'.
 394        ;; ("\\(\\s-\\|^\\)\\(-\\(\\(\\w\\|-[^-]\\)+\\)-\\)\\(\\s-\\|[?!.,;]\\)"
 395        ;; 2 3 gnus-emphasis-strikethru)
 396        ("\\(\\s-\\|^\\)\\(_\\(\\(\\w\\|_[^_]\\)+\\)_\\)\\(\\s-\\|[?!.,;]\\)"
 397         2 3 gnus-emphasis-underline))))
 398   "*Alist that says how to fontify certain phrases.
 399 Each item looks like this:
 400
 401   (\"_\\\\(\\\\w+\\\\)_\" 0 1 'underline)
 402
 403 The first element is a regular expression to be matched.  The second
 404 is a number that says what regular expression grouping used to find
 405 the entire emphasized word.  The third is a number that says what
 406 regexp grouping should be displayed and highlighted.  The fourth
 407 is the face used for highlighting."
 408   :type
 409   '(repeat
 410     (menu-choice
 411      :format "%[Customizing Style%]\n%v"
 412      :indent 2
 413      (group :tag "Default"
 414             :value ("" 0 0 default)
 415             :value-create
 416             (lambda (widget)
 417               (let ((value (widget-get
 418                             (cadr (widget-get (widget-get widget :parent)
 419                                               :args))
 420                             :value)))
 421                 (if (not (eq (nth 2 value) 'default))
 422                     (widget-put
 423                      widget
 424                      :value
 425                      (gnus-emphasis-custom-value-to-external value))))
 426               (widget-group-value-create widget))
 427             regexp
 428             (integer :format "Match group: %v")
 429             (integer :format "Emphasize group: %v")
 430             face)
 431      (group :tag "Simple"
 432             :value (("_" . "_") nil default)
 433             (cons :format "%v"
 434                   (regexp :format "Start regexp: %v")
 435                   (regexp :format "End regexp: %v"))
 436             (boolean :format "Show start and end patterns: %[%v%]\n"
 437                      :on " On " :off " Off ")
 438             face)))
 439   :get (lambda (symbol)
 440          (mapcar 'gnus-emphasis-custom-value-to-internal
 441                  (default-value symbol)))
 442   :set (lambda (symbol value)
 443          (set-default symbol (mapcar 'gnus-emphasis-custom-value-to-external
 444                                      value)))
 445   :group 'gnus-article-emphasis)
 446
 447 (defcustom gnus-emphasize-whitespace-regexp "^[ \t]+\\|[ \t]*\n"
 448   "A regexp to describe whitespace which should not be emphasized.
 449 Typical values are \"^[ \\t]+\\\\|[ \\t]*\\n\" and \"[ \\t]+\\\\|[ \\t]*\\n\".
 450 The former avoids underlining of leading and trailing whitespace,
 451 and the latter avoids underlining any whitespace at all."
 452   :version "21.1"
 453   :group 'gnus-article-emphasis
 454   :type 'regexp)
 455
 456 (defface gnus-emphasis-bold '((t (:bold t)))
 457   "Face used for displaying strong emphasized text (*word*)."
 458   :group 'gnus-article-emphasis)
 459
 460 (defface gnus-emphasis-italic '((t (:italic t)))
 461   "Face used for displaying italic emphasized text (/word/)."
 462   :group 'gnus-article-emphasis)
 463
 464 (defface gnus-emphasis-underline '((t (:underline t)))
 465   "Face used for displaying underlined emphasized text (_word_)."
 466   :group 'gnus-article-emphasis)
 467
 468 (defface gnus-emphasis-underline-bold '((t (:bold t :underline t)))
 469   "Face used for displaying underlined bold emphasized text (_*word*_)."
 470   :group 'gnus-article-emphasis)
 471
 472 (defface gnus-emphasis-underline-italic '((t (:italic t :underline t)))
 473   "Face used for displaying underlined italic emphasized text (_/word/_)."
 474   :group 'gnus-article-emphasis)
 475
 476 (defface gnus-emphasis-bold-italic '((t (:bold t :italic t)))
 477   "Face used for displaying bold italic emphasized text (/*word*/)."
 478   :group 'gnus-article-emphasis)
 479
 480 (defface gnus-emphasis-underline-bold-italic
 481   '((t (:bold t :italic t :underline t)))
 482   "Face used for displaying underlined bold italic emphasized text.
 483 Example: (_/*word*/_)."
 484   :group 'gnus-article-emphasis)
 485
 486 (defface gnus-emphasis-strikethru (if (featurep 'xemacs)
 487                                       '((t (:strikethru t)))
 488                                     '((t (:strike-through t))))
 489   "Face used for displaying strike-through text (-word-)."
 490   :group 'gnus-article-emphasis)
 491
 492 (defface gnus-emphasis-highlight-words
 493   '((t (:background "black" :foreground "yellow")))
 494   "Face used for displaying highlighted words."
 495   :group 'gnus-article-emphasis)
 496
 497 (defcustom gnus-article-time-format "%a, %d %b %Y %T %Z"
 498   "Format for display of Date headers in article bodies.
 499 See `format-time-string' for the possible values.
 500
 501 The variable can also be function, which should return a complete Date
 502 header.  The function is called with one argument, the time, which can
 503 be fed to `format-time-string'."
 504   :type '(choice string function)
 505   :link '(custom-manual "(gnus)Article Date")
 506   :group 'gnus-article-washing)
 507
 508 (defcustom gnus-save-all-headers t
 509   "*If non-nil, don't remove any headers before saving.
 510 This will be overridden by the `:headers' property that the symbol of
 511 the saver function, which is specified by `gnus-default-article-saver',
 512 might have."
 513   :group 'gnus-article-saving
 514   :type 'boolean)
 515
 516 (defcustom gnus-prompt-before-saving 'always
 517   "*This variable says how much prompting is to be done when saving articles.
 518 If it is nil, no prompting will be done, and the articles will be
 519 saved to the default files.  If this variable is `always', each and
 520 every article that is saved will be preceded by a prompt, even when
 521 saving large batches of articles.  If this variable is neither nil not
 522 `always', there the user will be prompted once for a file name for
 523 each invocation of the saving commands."
 524   :group 'gnus-article-saving
 525   :type '(choice (item always)
 526                  (item :tag "never" nil)
 527                  (sexp :tag "once" :format "%t\n" :value t)))
 528
 529 (defcustom gnus-saved-headers gnus-visible-headers
 530   "Headers to keep if `gnus-save-all-headers' is nil.
 531 If `gnus-save-all-headers' is non-nil, this variable will be ignored.
 532 If that variable is nil, however, all headers that match this regexp
 533 will be kept while the rest will be deleted before saving.  This and
 534 `gnus-save-all-headers' will be overridden by the `:headers' property
 535 that the symbol of the saver function, which is specified by
 536 `gnus-default-article-saver', might have."
 537   :group 'gnus-article-saving
 538   :type 'regexp)
 539
 540 (defcustom gnus-default-article-saver 'gnus-summary-save-in-rmail
 541   "A function to save articles in your favourite format.
 542 The function will be called by way of the `gnus-summary-save-article'
 543 command, and friends such as `gnus-summary-save-article-rmail'.
 544
 545 Gnus provides the following functions:
 546
 547 * gnus-summary-save-in-rmail (Rmail format)
 548 * gnus-summary-save-in-mail (Unix mail format)
 549 * gnus-summary-save-in-folder (MH folder)
 550 * gnus-summary-save-in-file (article format)
 551 * gnus-summary-save-body-in-file (article body)
 552 * gnus-summary-save-in-vm (use VM's folder format)
 553 * gnus-summary-write-to-file (article format -- overwrite)
 554 * gnus-summary-write-body-to-file (article body -- overwrite)
 555 * gnus-summary-save-in-pipe (article format)
 556
 557 The symbol of each function may have the following properties:
 558
 559 * :decode
 560 The value non-nil means save decoded articles.  This is meaningful
 561 only with `gnus-summary-save-in-file', `gnus-summary-save-body-in-file',
 562 `gnus-summary-write-to-file', `gnus-summary-write-body-to-file', and
 563 `gnus-summary-save-in-pipe'.
 564
 565 * :function
 566 The value specifies an alternative function which appends, not
 567 overwrites, articles to a file.  This implies that when saving many
 568 articles at a time, `gnus-prompt-before-saving' is bound to t and all
 569 articles are saved in a single file.  This is meaningful only with
 570 `gnus-summary-write-to-file' and `gnus-summary-write-body-to-file'.
 571
 572 * :headers
 573 The value specifies the symbol of a variable of which the value
 574 specifies headers to be saved.  If it is omitted,
 575 `gnus-save-all-headers' and `gnus-saved-headers' control what
 576 headers should be saved."
 577   :group 'gnus-article-saving
 578   :type '(radio (function-item gnus-summary-save-in-rmail)
 579                 (function-item gnus-summary-save-in-mail)
 580                 (function-item gnus-summary-save-in-folder)
 581                 (function-item gnus-summary-save-in-file)
 582                 (function-item gnus-summary-save-body-in-file)
 583                 (function-item gnus-summary-save-in-vm)
 584                 (function-item gnus-summary-write-to-file)
 585                 (function-item gnus-summary-write-body-to-file)
 586                 (function-item gnus-summary-save-in-pipe)
 587                 (function)))
 588
 589 (defcustom gnus-article-save-coding-system
 590   (or (and (mm-coding-system-p 'utf-8) 'utf-8)
 591       (and (mm-coding-system-p 'iso-2022-7bit) 'iso-2022-7bit)
 592       (and (mm-coding-system-p 'emacs-mule) 'emacs-mule)
 593       (and (mm-coding-system-p 'escape-quoted) 'escape-quoted))
 594   "Coding system used to save decoded articles to a file.
 595
 596 The recommended coding systems are `utf-8', `iso-2022-7bit' and so on,
 597 which can safely encode any characters in text.  This is used by the
 598 commands including:
 599
 600 * gnus-summary-save-article-file
 601 * gnus-summary-save-article-body-file
 602 * gnus-summary-write-article-file
 603 * gnus-summary-write-article-body-file
 604
 605 and the functions to which you may set `gnus-default-article-saver':
 606
 607 * gnus-summary-save-in-file
 608 * gnus-summary-save-body-in-file
 609 * gnus-summary-write-to-file
 610 * gnus-summary-write-body-to-file
 611
 612 Those commands and functions save just text displayed in the article
 613 buffer to a file if the value of this variable is non-nil.  Note that
 614 buttonized MIME parts will be lost in a saved file in that case.
 615 Otherwise, raw articles will be saved."
 616   :group 'gnus-article-saving
 617   :type `(choice
 618           :format "%{%t%}:\n %[Value Menu%] %v"
 619           (const :tag "Save raw articles" nil)
 620           ,@(delq nil
 621                   (mapcar
 622                    (lambda (arg) (if (mm-coding-system-p (nth 3 arg)) arg))
 623                    '((const :tag "UTF-8" utf-8)
 624                      (const :tag "iso-2022-7bit" iso-2022-7bit)
 625                      (const :tag "Emacs internal" emacs-mule)
 626                      (const :tag "escape-quoted" escape-quoted))))
 627           (symbol :tag "Coding system")))
 628
 629 (defcustom gnus-rmail-save-name 'gnus-plain-save-name
 630   "A function generating a file name to save articles in Rmail format.
 631 The function is called with NEWSGROUP, HEADERS, and optional LAST-FILE."
 632   :group 'gnus-article-saving
 633   :type 'function)
 634
 635 (defcustom gnus-mail-save-name 'gnus-plain-save-name
 636   "A function generating a file name to save articles in Unix mail format.
 637 The function is called with NEWSGROUP, HEADERS, and optional LAST-FILE."
 638   :group 'gnus-article-saving
 639   :type 'function)
 640
 641 (defcustom gnus-folder-save-name 'gnus-folder-save-name
 642   "A function generating a file name to save articles in MH folder.
 643 The function is called with NEWSGROUP, HEADERS, and optional LAST-FOLDER."
 644   :group 'gnus-article-saving
 645   :type 'function)
 646
 647 (defcustom gnus-file-save-name 'gnus-numeric-save-name
 648   "A function generating a file name to save articles in article format.
 649 The function is called with NEWSGROUP, HEADERS, and optional
 650 LAST-FILE."
 651   :group 'gnus-article-saving
 652   :type 'function)
 653
 654 (defcustom gnus-split-methods
 655   '((gnus-article-archive-name)
 656     (gnus-article-nndoc-name))
 657   "*Variable used to suggest where articles are to be saved.
 658 For instance, if you would like to save articles related to Gnus in
 659 the file \"gnus-stuff\", and articles related to VM in \"vm-stuff\",
 660 you could set this variable to something like:
 661
 662  '((\"^Subject:.*gnus\\|^Newsgroups:.*gnus\" \"gnus-stuff\")
 663    (\"^Subject:.*vm\\|^Xref:.*vm\" \"vm-stuff\"))
 664
 665 This variable is an alist where the key is the match and the
 666 value is a list of possible files to save in if the match is
 667 non-nil.
 668
 669 If the match is a string, it is used as a regexp match on the
 670 article.  If the match is a symbol, that symbol will be funcalled
 671 from the buffer of the article to be saved with the newsgroup as the
 672 parameter.  If it is a list, it will be evaled in the same buffer.
 673
 674 If this form or function returns a string, this string will be used as a
 675 possible file name; and if it returns a non-nil list, that list will be
 676 used as possible file names."
 677   :group 'gnus-article-saving
 678   :type '(repeat (choice (list :value (fun) function)
 679                          (cons :value ("" "") regexp (repeat string))
 680                          (sexp :value nil))))
 681
 682 (defcustom gnus-page-delimiter "^\^L"
 683   "*Regexp describing what to use as article page delimiters.
 684 The default value is \"^\^L\", which is a form linefeed at the
 685 beginning of a line."
 686   :type 'regexp
 687   :group 'gnus-article-various)
 688
 689 (defcustom gnus-article-mode-line-format "Gnus: %g [%w] %S%m"
 690   "*The format specification for the article mode line.
 691 See `gnus-summary-mode-line-format' for a closer description.
 692
 693 The following additional specs are available:
 694
 695 %w  The article washing status.
 696 %m  The number of MIME parts in the article."
 697   :type 'string
 698   :group 'gnus-article-various)
 699
 700 (defcustom gnus-article-mode-hook nil
 701   "*A hook for Gnus article mode."
 702   :type 'hook
 703   :group 'gnus-article-various)
 704
 705 (when (featurep 'xemacs)
 706   ;; Extracted from gnus-xmas-define in order to preserve user settings
 707   (when (fboundp 'turn-off-scroll-in-place)
 708     (add-hook 'gnus-article-mode-hook 'turn-off-scroll-in-place))
 709   ;; Extracted from gnus-xmas-redefine in order to preserve user settings
 710   (add-hook 'gnus-article-mode-hook 'gnus-xmas-article-menu-add))
 711
 712 (defcustom gnus-article-menu-hook nil
 713   "*Hook run after the creation of the article mode menu."
 714   :type 'hook
 715   :group 'gnus-article-various)
 716
 717 (defcustom gnus-article-prepare-hook nil
 718   "*A hook called after an article has been prepared in the article buffer."
 719   :type 'hook
 720   :group 'gnus-article-various)
 721
 722 (defcustom gnus-copy-article-ignored-headers nil
 723   "List of headers to be removed when copying an article.
 724 Each element is a regular expression."
 725   :version "23.1" ;; No Gnus
 726   :type '(repeat regexp)
 727   :group 'gnus-article-various)
 728
 729 (make-obsolete-variable 'gnus-article-hide-pgp-hook
 730                         "This variable is obsolete in Gnus 5.10.")
 731
 732 (defface gnus-button
 733   '((t (:weight bold)))
 734   "Face used for highlighting a button in the article buffer."
 735   :group 'gnus-article-buttons)
 736
 737 (defcustom gnus-article-button-face 'gnus-button
 738   "Face used for highlighting buttons in the article buffer.
 739
 740 An article button is a piece of text that you can activate by pressing
 741 `RET' or `mouse-2' above it."
 742   :type 'face
 743   :group 'gnus-article-buttons)
 744
 745 (defcustom gnus-article-mouse-face 'highlight
 746   "Face used for mouse highlighting in the article buffer.
 747
 748 Article buttons will be displayed in this face when the cursor is
 749 above them."
 750   :type 'face
 751   :group 'gnus-article-buttons)
 752
 753 (defcustom gnus-signature-face 'gnus-signature
 754   "Face used for highlighting a signature in the article buffer.
 755 Obsolete; use the face `gnus-signature' for customizations instead."
 756   :type 'face
 757   :group 'gnus-article-highlight
 758   :group 'gnus-article-signature)
 759
 760 (defface gnus-signature
 761   '((t
 762      (:italic t)))
 763   "Face used for highlighting a signature in the article buffer."
 764   :group 'gnus-article-highlight
 765   :group 'gnus-article-signature)
 766 ;; backward-compatibility alias
 767 (put 'gnus-signature-face 'face-alias 'gnus-signature)
 768
 769 (defface gnus-header-from
 770   '((((class color)
 771       (background dark))
 772      (:foreground "PaleGreen1"))
 773     (((class color)
 774       (background light))
 775      (:foreground "red3"))
 776     (t
 777      (:italic t)))
 778   "Face used for displaying from headers."
 779   :group 'gnus-article-headers
 780   :group 'gnus-article-highlight)
 781 ;; backward-compatibility alias
 782 (put 'gnus-header-from-face 'face-alias 'gnus-header-from)
 783
 784 (defface gnus-header-subject
 785   '((((class color)
 786       (background dark))
 787      (:foreground "SeaGreen1"))
 788     (((class color)
 789       (background light))
 790      (:foreground "red4"))
 791     (t
 792      (:bold t :italic t)))
 793   "Face used for displaying subject headers."
 794   :group 'gnus-article-headers
 795   :group 'gnus-article-highlight)
 796 ;; backward-compatibility alias
 797 (put 'gnus-header-subject-face 'face-alias 'gnus-header-subject)
 798
 799 (defface gnus-header-newsgroups
 800   '((((class color)
 801       (background dark))
 802      (:foreground "yellow" :italic t))
 803     (((class color)
 804       (background light))
 805      (:foreground "MidnightBlue" :italic t))
 806     (t
 807      (:italic t)))
 808   "Face used for displaying newsgroups headers.
 809 In the default setup this face is only used for crossposted
 810 articles."
 811   :group 'gnus-article-headers
 812   :group 'gnus-article-highlight)
 813 ;; backward-compatibility alias
 814 (put 'gnus-header-newsgroups-face 'face-alias 'gnus-header-newsgroups)
 815
 816 (defface gnus-header-name
 817   '((((class color)
 818       (background dark))
 819      (:foreground "SpringGreen2"))
 820     (((class color)
 821       (background light))
 822      (:foreground "maroon"))
 823     (t
 824      (:bold t)))
 825   "Face used for displaying header names."
 826   :group 'gnus-article-headers
 827   :group 'gnus-article-highlight)
 828 ;; backward-compatibility alias
 829 (put 'gnus-header-name-face 'face-alias 'gnus-header-name)
 830
 831 (defface gnus-header-content
 832   '((((class color)
 833       (background dark))
 834      (:foreground "SpringGreen1" :italic t))
 835     (((class color)
 836       (background light))
 837      (:foreground "indianred4" :italic t))
 838     (t
 839      (:italic t)))  "Face used for displaying header content."
 840   :group 'gnus-article-headers
 841   :group 'gnus-article-highlight)
 842 ;; backward-compatibility alias
 843 (put 'gnus-header-content-face 'face-alias 'gnus-header-content)
 844
 845 (defcustom gnus-header-face-alist
 846   '(("From" nil gnus-header-from)
 847     ("Subject" nil gnus-header-subject)
 848     ("Newsgroups:.*," nil gnus-header-newsgroups)
 849     ("" gnus-header-name gnus-header-content))
 850   "*Controls highlighting of article headers.
 851
 852 An alist of the form (HEADER NAME CONTENT).
 853
 854 HEADER is a regular expression which should match the name of a
 855 header and NAME and CONTENT are either face names or nil.
 856
 857 The name of each header field will be displayed using the face
 858 specified by the first element in the list where HEADER matches
 859 the header name and NAME is non-nil.  Similarly, the content will
 860 be displayed by the first non-nil matching CONTENT face."
 861   :group 'gnus-article-headers
 862   :group 'gnus-article-highlight
 863   :type '(repeat (list (regexp :tag "Header")
 864                        (choice :tag "Name"
 865                                (item :tag "skip" nil)
 866                                (face :value default))
 867                        (choice :tag "Content"
 868                                (item :tag "skip" nil)
 869                                (face :value default)))))
 870
 871 (defcustom gnus-face-properties-alist (if (featurep 'xemacs)
 872                                           '((xface . (:face gnus-x-face)))
 873                                         '((pbm . (:face gnus-x-face))
 874                                           (png . nil)))
 875   "Alist of image types and properties applied to Face and X-Face images.
 876 Here are examples:
 877
 878 ;; Specify the altitude of Face images in the From header.
 879 \(setq gnus-face-properties-alist
 880       '((pbm . (:face gnus-x-face :ascent 80))
 881         (png . (:ascent 80))))
 882
 883 ;; Show Face images as pressed buttons.
 884 \(setq gnus-face-properties-alist
 885       '((pbm . (:face gnus-x-face :relief -2))
 886         (png . (:relief -2))))
 887
 888 See the manual for the valid properties for various image types.
 889 Currently, `pbm' is used for X-Face images and `png' is used for Face
 890 images in Emacs.  Only the `:face' property is effective on the `xface'
 891 image type in XEmacs if it is built with the libcompface library."
 892   :version "23.1" ;; No Gnus
 893   :group 'gnus-article-headers
 894   :type '(repeat (cons :format "%v" (symbol :tag "Image type") plist)))
 895
 896 (defcustom gnus-article-decode-hook
 897   '(article-decode-charset article-decode-encoded-words
 898                            article-decode-group-name article-decode-idna-rhs)
 899   "*Hook run to decode charsets in articles."
 900   :group 'gnus-article-headers
 901   :type 'hook)
 902
 903 (defcustom gnus-display-mime-function 'gnus-display-mime
 904   "Function to display MIME articles."
 905   :group 'gnus-article-mime
 906   :type 'function)
 907
 908 (defvar gnus-decode-header-function 'mail-decode-encoded-word-region
 909   "Function used to decode headers.")
 910
 911 (defvar gnus-decode-address-function 'mail-decode-encoded-address-region
 912   "Function used to decode addresses.")
 913
 914 (defvar gnus-article-dumbquotes-map
 915   '(("\200" "EUR")
 916     ("\202" ",")
 917     ("\203" "f")
 918     ("\204" ",,")
 919     ("\205" "...")
 920     ("\213" "<")
 921     ("\214" "OE")
 922     ("\221" "`")
 923     ("\222" "'")
 924     ("\223" "``")
 925     ("\224" "\"")
 926     ("\225" "*")
 927     ("\226" "-")
 928     ("\227" "--")
 929     ("\230" "~")
 930     ("\231" "(TM)")
 931     ("\233" ">")
 932     ("\234" "oe")
 933     ("\264" "'"))
 934   "Table for MS-to-Latin1 translation.")
 935
 936 (defcustom gnus-ignored-mime-types nil
 937   "List of MIME types that should be ignored by Gnus."
 938   :version "21.1"
 939   :group 'gnus-article-mime
 940   :type '(repeat regexp))
 941
 942 (defcustom gnus-unbuttonized-mime-types '(".*/.*")
 943   "List of MIME types that should not be given buttons when rendered inline.
 944 See also `gnus-buttonized-mime-types' which may override this variable.
 945 This variable is only used when `gnus-inhibit-mime-unbuttonizing' is nil."
 946   :version "21.1"
 947   :group 'gnus-article-mime
 948   :type '(repeat regexp))
 949
 950 (defcustom gnus-buttonized-mime-types nil
 951   "List of MIME types that should be given buttons when rendered inline.
 952 If set, this variable overrides `gnus-unbuttonized-mime-types'.
 953 To see e.g. security buttons you could set this to
 954 `(\"multipart/signed\")'.  You could also add \"multipart/alternative\" to
 955 this list to display radio buttons that allow you to choose one of two
 956 media types those mails include.  See also `mm-discouraged-alternatives'.
 957 This variable is only used when `gnus-inhibit-mime-unbuttonizing' is nil."
 958   :version "22.1"
 959   :group 'gnus-article-mime
 960   :type '(repeat regexp))
 961
 962 (defcustom gnus-inhibit-mime-unbuttonizing nil
 963   "If non-nil, all MIME parts get buttons.
 964 When nil (the default value), then some MIME parts do not get buttons,
 965 as described by the variables `gnus-buttonized-mime-types' and
 966 `gnus-unbuttonized-mime-types'."
 967   :version "22.1"
 968   :group 'gnus-article-mime
 969   :type 'boolean)
 970
 971 (defcustom gnus-body-boundary-delimiter "_"
 972   "String used to delimit header and body.
 973 This variable is used by `gnus-article-treat-body-boundary' which can
 974 be controlled by `gnus-treat-body-boundary'."
 975   :version "22.1"
 976   :group 'gnus-article-various
 977   :type '(choice (item :tag "None" :value nil)
 978                  string))
 979
 980 (defcustom gnus-picon-databases '("/usr/lib/picon" "/usr/local/faces"
 981                                   "/usr/share/picons")
 982   "Defines the location of the faces database.
 983 For information on obtaining this database of pretty pictures, please
 984 see http://www.cs.indiana.edu/picons/ftp/index.html"
 985   :version "22.1"
 986   :type '(repeat directory)
 987   :link '(url-link :tag "download"
 988                    "http://www.cs.indiana.edu/picons/ftp/index.html")
 989   :link '(custom-manual "(gnus)Picons")
 990   :group 'gnus-picon)
 991
 992 (defun gnus-picons-installed-p ()
 993   "Say whether picons are installed on your machine."
 994   (let ((installed nil))
 995     (dolist (database gnus-picon-databases)
 996       (when (file-exists-p database)
 997         (setq installed t)))
 998     installed))
 999
1000 (defcustom gnus-article-mime-part-function nil
1001   "Function called with a MIME handle as the argument.
1002 This is meant for people who want to do something automatic based
1003 on parts -- for instance, adding Vcard info to a database."
1004   :group 'gnus-article-mime
1005   :type '(choice (const nil)
1006                  function))
1007
1008 (defcustom gnus-mime-multipart-functions nil
1009   "An alist of MIME types to functions to display them."
1010   :version "21.1"
1011   :group 'gnus-article-mime
1012   :type '(repeat (cons :format "%v" (string :tag "MIME type") function)))
1013
1014 (defcustom gnus-article-date-lapsed-new-header nil
1015   "Whether the X-Sent and Date headers can coexist.
1016 When using `gnus-treat-date-lapsed', the \"X-Sent:\" header will
1017 either replace the old \"Date:\" header (if this variable is nil), or
1018 be added below it (otherwise)."
1019   :version "21.1"
1020   :group 'gnus-article-headers
1021   :type 'boolean)
1022
1023 (defcustom gnus-article-mime-match-handle-function 'undisplayed-alternative
1024   "Function called with a MIME handle as the argument.
1025 This is meant for people who want to view first matched part.
1026 For `undisplayed-alternative' (default), the first undisplayed
1027 part or alternative part is used.  For `undisplayed', the first
1028 undisplayed part is used.  For a function, the first part which
1029 the function return t is used.  For nil, the first part is
1030 used."
1031   :version "21.1"
1032   :group 'gnus-article-mime
1033   :type '(choice
1034           (item :tag "first" :value nil)
1035           (item :tag "undisplayed" :value undisplayed)
1036           (item :tag "undisplayed or alternative"
1037                 :value undisplayed-alternative)
1038           (function)))
1039
1040 (defcustom gnus-mime-action-alist
1041   '(("save to file" . gnus-mime-save-part)
1042     ("save and strip" . gnus-mime-save-part-and-strip)
1043     ("replace with file" . gnus-mime-replace-part)
1044     ("delete part" . gnus-mime-delete-part)
1045     ("display as text" . gnus-mime-inline-part)
1046     ("view the part" . gnus-mime-view-part)
1047     ("pipe to command" . gnus-mime-pipe-part)
1048     ("toggle display" . gnus-article-press-button)
1049     ("toggle display" . gnus-article-view-part-as-charset)
1050     ("view as type" . gnus-mime-view-part-as-type)
1051     ("view internally" . gnus-mime-view-part-internally)
1052     ("view externally" . gnus-mime-view-part-externally))
1053   "An alist of actions that run on the MIME attachment."
1054   :group 'gnus-article-mime
1055   :type '(repeat (cons (string :tag "name")
1056                        (function))))
1057
1058 (defcustom gnus-auto-select-part 1
1059   "Advance to next MIME part when deleting or stripping parts.
1060
1061 When 0, point will be placed on the same part as before.  When
1062 positive (negative), move point forward (backwards) this many
1063 parts.  When nil, redisplay article."
1064   :version "23.1" ;; No Gnus
1065   :group 'gnus-article-mime
1066   :type '(choice (const nil :tag "Redisplay article.")
1067                  (const 1 :tag "Next part.")
1068                  (const 0 :tag "Current part.")
1069                  integer))
1070
1071 ;;;
1072 ;;; The treatment variables
1073 ;;;
1074
1075 (defvar gnus-part-display-hook nil
1076   "Hook called on parts that are to receive treatment.")
1077
1078 (defvar gnus-article-treat-custom
1079   '(choice (const :tag "Off" nil)
1080            (const :tag "On" t)
1081            (const :tag "Header" head)
1082            (const :tag "First" first)
1083            (const :tag "Last" last)
1084            (integer :tag "Less")
1085            (repeat :tag "Groups" regexp)
1086            (sexp :tag "Predicate")))
1087
1088 (defvar gnus-article-treat-head-custom
1089   '(choice (const :tag "Off" nil)
1090            (const :tag "Header" head)))
1091
1092 (defvar gnus-article-treat-types '("text/plain" "text/x-verbatim"
1093                                    "text/x-patch")
1094   "Parts to treat.")
1095
1096 (defvar gnus-inhibit-treatment nil
1097   "Whether to inhibit treatment.")
1098
1099 (defcustom gnus-treat-highlight-signature '(or t (typep "text/x-vcard"))
1100   "Highlight the signature.
1101 Valid values are nil, t, `head', `first', `last', an integer or a
1102 predicate.  See Info node `(gnus)Customizing Articles'."
1103   :group 'gnus-article-treat
1104   :link '(custom-manual "(gnus)Customizing Articles")
1105   :type gnus-article-treat-custom)
1106 (put 'gnus-treat-highlight-signature 'highlight t)
1107
1108 (defcustom gnus-treat-buttonize 100000
1109   "Add buttons.
1110 Valid values are nil, t, `head', `first', `last', an integer or a
1111 predicate.  See Info node `(gnus)Customizing Articles'."
1112   :group 'gnus-article-treat
1113   :link '(custom-manual "(gnus)Customizing Articles")
1114   :type gnus-article-treat-custom)
1115 (put 'gnus-treat-buttonize 'highlight t)
1116
1117 (defcustom gnus-treat-buttonize-head 'head
1118   "Add buttons to the head.
1119 Valid values are nil, t, `head', `first', `last', an integer or a
1120 predicate.  See Info node `(gnus)Customizing Articles'."
1121   :group 'gnus-article-treat
1122   :link '(custom-manual "(gnus)Customizing Articles")
1123   :type gnus-article-treat-head-custom)
1124 (put 'gnus-treat-buttonize-head 'highlight t)
1125
1126 (defcustom gnus-treat-emphasize 50000
1127   "Emphasize text.
1128 Valid values are nil, t, `head', `first', `last', an integer or a
1129 predicate.  See Info node `(gnus)Customizing Articles'."
1130   :group 'gnus-article-treat
1131   :link '(custom-manual "(gnus)Customizing Articles")
1132   :type gnus-article-treat-custom)
1133 (put 'gnus-treat-emphasize 'highlight t)
1134
1135 (defcustom gnus-treat-strip-cr nil
1136   "Remove carriage returns.
1137 Valid values are nil, t, `head', `first', `last', an integer or a
1138 predicate.  See Info node `(gnus)Customizing Articles'."
1139   :version "22.1"
1140   :group 'gnus-article-treat
1141   :link '(custom-manual "(gnus)Customizing Articles")
1142   :type gnus-article-treat-custom)
1143
1144 (defcustom gnus-treat-unsplit-urls nil
1145   "Remove newlines from within URLs.
1146 Valid values are nil, t, `head', `first', `last', an integer or a
1147 predicate.  See Info node `(gnus)Customizing Articles'."
1148   :version "22.1"
1149   :group 'gnus-article-treat
1150   :link '(custom-manual "(gnus)Customizing Articles")
1151   :type gnus-article-treat-custom)
1152
1153 (defcustom gnus-treat-leading-whitespace nil
1154   "Remove leading whitespace in headers.
1155 Valid values are nil, t, `head', `first', `last', an integer or a
1156 predicate.  See Info node `(gnus)Customizing Articles'."
1157   :version "22.1"
1158   :group 'gnus-article-treat
1159   :link '(custom-manual "(gnus)Customizing Articles")
1160   :type gnus-article-treat-custom)
1161
1162 (defcustom gnus-treat-hide-headers 'head
1163   "Hide headers.
1164 Valid values are nil, t, `head', `first', `last', an integer or a
1165 predicate.  See Info node `(gnus)Customizing Articles'."
1166   :group 'gnus-article-treat
1167   :link '(custom-manual "(gnus)Customizing Articles")
1168   :type gnus-article-treat-head-custom)
1169
1170 (defcustom gnus-treat-hide-boring-headers nil
1171   "Hide boring headers.
1172 Valid values are nil, t, `head', `first', `last', an integer or a
1173 predicate.  See Info node `(gnus)Customizing Articles'."
1174   :group 'gnus-article-treat
1175   :link '(custom-manual "(gnus)Customizing Articles")
1176   :type gnus-article-treat-head-custom)
1177
1178 (defcustom gnus-treat-hide-signature nil
1179   "Hide the signature.
1180 Valid values are nil, t, `head', `first', `last', an integer or a
1181 predicate.  See Info node `(gnus)Customizing Articles'."
1182   :group 'gnus-article-treat
1183   :link '(custom-manual "(gnus)Customizing Articles")
1184   :type gnus-article-treat-custom)
1185
1186 (defcustom gnus-treat-fill-article nil
1187   "Fill the article.
1188 Valid values are nil, t, `head', `first', `last', an integer or a
1189 predicate.  See Info node `(gnus)Customizing Articles'."
1190   :group 'gnus-article-treat
1191   :link '(custom-manual "(gnus)Customizing Articles")
1192   :type gnus-article-treat-custom)
1193
1194 (defcustom gnus-treat-hide-citation nil
1195   "Hide cited text.
1196 Valid values are nil, t, `head', `first', `last', an integer or a
1197 predicate.  See Info node `(gnus)Customizing Articles'."
1198   :group 'gnus-article-treat
1199   :link '(custom-manual "(gnus)Customizing Articles")
1200   :type gnus-article-treat-custom)
1201
1202 (defcustom gnus-treat-hide-citation-maybe nil
1203   "Hide cited text.
1204 Valid values are nil, t, `head', `first', `last', an integer or a
1205 predicate.  See Info node `(gnus)Customizing Articles'."
1206   :group 'gnus-article-treat
1207   :link '(custom-manual "(gnus)Customizing Articles")
1208   :type gnus-article-treat-custom)
1209
1210 (defcustom gnus-treat-strip-list-identifiers 'head
1211   "Strip list identifiers from `gnus-list-identifiers`.
1212 Valid values are nil, t, `head', `first', `last', an integer or a
1213 predicate.  See Info node `(gnus)Customizing Articles'."
1214   :version "21.1"
1215   :group 'gnus-article-treat
1216   :link '(custom-manual "(gnus)Customizing Articles")
1217   :type gnus-article-treat-custom)
1218
1219 (make-obsolete-variable 'gnus-treat-strip-pgp
1220                         "This option is obsolete in Gnus 5.10.")
1221
1222 (defcustom gnus-treat-strip-pem nil
1223   "Strip PEM signatures.
1224 Valid values are nil, t, `head', `first', `last', an integer or a
1225 predicate.  See Info node `(gnus)Customizing Articles'."
1226   :group 'gnus-article-treat
1227   :link '(custom-manual "(gnus)Customizing Articles")
1228   :type gnus-article-treat-custom)
1229
1230 (defcustom gnus-treat-strip-banner t
1231   "Strip banners from articles.
1232 The banner to be stripped is specified in the `banner' group parameter.
1233 Valid values are nil, t, `head', `first', `last', an integer or a
1234 predicate.  See Info node `(gnus)Customizing Articles'."
1235   :group 'gnus-article-treat
1236   :link '(custom-manual "(gnus)Customizing Articles")
1237   :type gnus-article-treat-custom)
1238
1239 (defcustom gnus-treat-highlight-headers 'head
1240   "Highlight the headers.
1241 Valid values are nil, t, `head', `first', `last', an integer or a
1242 predicate.  See Info node `(gnus)Customizing Articles'."
1243   :group 'gnus-article-treat
1244   :link '(custom-manual "(gnus)Customizing Articles")
1245   :type gnus-article-treat-head-custom)
1246 (put 'gnus-treat-highlight-headers 'highlight t)
1247
1248 (defcustom gnus-treat-highlight-citation t
1249   "Highlight cited text.
1250 Valid values are nil, t, `head', `first', `last', an integer or a
1251 predicate.  See Info node `(gnus)Customizing Articles'."
1252   :group 'gnus-article-treat
1253   :link '(custom-manual "(gnus)Customizing Articles")
1254   :type gnus-article-treat-custom)
1255 (put 'gnus-treat-highlight-citation 'highlight t)
1256
1257 (defcustom gnus-treat-date-ut nil
1258   "Display the Date in UT (GMT).
1259 Valid values are nil, t, `head', `first', `last', an integer or a
1260 predicate.  See Info node `(gnus)Customizing Articles'."
1261   :group 'gnus-article-treat
1262   :link '(custom-manual "(gnus)Customizing Articles")
1263   :type gnus-article-treat-head-custom)
1264
1265 (defcustom gnus-treat-date-local nil
1266   "Display the Date in the local timezone.
1267 Valid values are nil, t, `head', `first', `last', an integer or a
1268 predicate.  See Info node `(gnus)Customizing Articles'."
1269   :group 'gnus-article-treat
1270   :link '(custom-manual "(gnus)Customizing Articles")
1271   :type gnus-article-treat-head-custom)
1272
1273 (defcustom gnus-treat-date-english nil
1274   "Display the Date in a format that can be read aloud in English.
1275 Valid values are nil, t, `head', `first', `last', an integer or a
1276 predicate.  See Info node `(gnus)Customizing Articles'."
1277   :version "22.1"
1278   :group 'gnus-article-treat
1279   :link '(custom-manual "(gnus)Customizing Articles")
1280   :type gnus-article-treat-head-custom)
1281
1282 (defcustom gnus-treat-date-lapsed nil
1283   "Display the Date header in a way that says how much time has elapsed.
1284 Valid values are nil, t, `head', `first', `last', an integer or a
1285 predicate.  See Info node `(gnus)Customizing Articles'."
1286   :group 'gnus-article-treat
1287   :link '(custom-manual "(gnus)Customizing Articles")
1288   :type gnus-article-treat-head-custom)
1289
1290 (defcustom gnus-treat-date-original nil
1291   "Display the date in the original timezone.
1292 Valid values are nil, t, `head', `first', `last', an integer or a
1293 predicate.  See Info node `(gnus)Customizing Articles'."
1294   :group 'gnus-article-treat
1295   :link '(custom-manual "(gnus)Customizing Articles")
1296   :type gnus-article-treat-head-custom)
1297
1298 (defcustom gnus-treat-date-iso8601 nil
1299   "Display the date in the ISO8601 format.
1300 Valid values are nil, t, `head', `first', `last', an integer or a
1301 predicate.  See Info node `(gnus)Customizing Articles'."
1302   :version "21.1"
1303   :group 'gnus-article-treat
1304   :link '(custom-manual "(gnus)Customizing Articles")
1305   :type gnus-article-treat-head-custom)
1306
1307 (defcustom gnus-treat-date-user-defined nil
1308   "Display the date in a user-defined format.
1309 The format is defined by the `gnus-article-time-format' variable.
1310 Valid values are nil, t, `head', `first', `last', an integer or a
1311 predicate.  See Info node `(gnus)Customizing Articles'."
1312   :group 'gnus-article-treat
1313   :link '(custom-manual "(gnus)Customizing Articles")
1314   :type gnus-article-treat-head-custom)
1315
1316 (defcustom gnus-treat-strip-headers-in-body t
1317   "Strip the X-No-Archive header line from the beginning of the body.
1318 Valid values are nil, t, `head', `first', `last', an integer or a
1319 predicate.  See Info node `(gnus)Customizing Articles'."
1320   :version "21.1"
1321   :group 'gnus-article-treat
1322   :link '(custom-manual "(gnus)Customizing Articles")
1323   :type gnus-article-treat-custom)
1324
1325 (defcustom gnus-treat-strip-trailing-blank-lines nil
1326   "Strip trailing blank lines.
1327 Valid values are nil, t, `head', `first', `last', an integer or a
1328 predicate.  See Info node `(gnus)Customizing Articles'.
1329
1330 When set to t, it also strips trailing blanks in all MIME parts.
1331 Consider to use `last' instead."
1332   :group 'gnus-article-treat
1333   :link '(custom-manual "(gnus)Customizing Articles")
1334   :type gnus-article-treat-custom)
1335
1336 (defcustom gnus-treat-strip-leading-blank-lines nil
1337   "Strip leading blank lines.
1338 Valid values are nil, t, `head', `first', `last', an integer or a
1339 predicate.  See Info node `(gnus)Customizing Articles'.
1340
1341 When set to t, it also strips trailing blanks in all MIME parts."
1342   :group 'gnus-article-treat
1343   :link '(custom-manual "(gnus)Customizing Articles")
1344   :type gnus-article-treat-custom)
1345
1346 (defcustom gnus-treat-strip-multiple-blank-lines nil
1347   "Strip multiple blank lines.
1348 Valid values are nil, t, `head', `first', `last', an integer or a
1349 predicate.  See Info node `(gnus)Customizing Articles'."
1350   :group 'gnus-article-treat
1351   :link '(custom-manual "(gnus)Customizing Articles")
1352   :type gnus-article-treat-custom)
1353
1354 (defcustom gnus-treat-unfold-headers 'head
1355   "Unfold folded header lines.
1356 Valid values are nil, t, `head', `first', `last', an integer or a
1357 predicate.  See Info node `(gnus)Customizing Articles'."
1358   :version "22.1"
1359   :group 'gnus-article-treat
1360   :link '(custom-manual "(gnus)Customizing Articles")
1361   :type gnus-article-treat-custom)
1362
1363 (defcustom gnus-article-unfold-long-headers nil
1364   "If non-nil, allow unfolding headers even if the header is long.
1365 If it is a regexp, only long headers matching this regexp are unfolded.
1366 If it is t, all long headers are unfolded.
1367
1368 This variable has no effect if `gnus-treat-unfold-headers' is nil."
1369   :version "23.1" ;; No Gnus
1370   :group 'gnus-article-treat
1371   :type '(choice (const nil)
1372                  (const :tag "all" t)
1373                  (regexp)))
1374
1375 (defcustom gnus-treat-fold-headers nil
1376   "Fold headers.
1377 Valid values are nil, t, `head', `first', `last', an integer or a
1378 predicate.  See Info node `(gnus)Customizing Articles'."
1379   :version "22.1"
1380   :group 'gnus-article-treat
1381   :link '(custom-manual "(gnus)Customizing Articles")
1382   :type gnus-article-treat-custom)
1383
1384 (defcustom gnus-treat-fold-newsgroups 'head
1385   "Fold the Newsgroups and Followup-To headers.
1386 Valid values are nil, t, `head', `first', `last', an integer or a
1387 predicate.  See Info node `(gnus)Customizing Articles'."
1388   :version "22.1"
1389   :group 'gnus-article-treat
1390   :link '(custom-manual "(gnus)Customizing Articles")
1391   :type gnus-article-treat-custom)
1392
1393 (defcustom gnus-treat-overstrike t
1394   "Treat overstrike highlighting.
1395 Valid values are nil, t, `head', `first', `last', an integer or a
1396 predicate.  See Info node `(gnus)Customizing Articles'."
1397   :group 'gnus-article-treat
1398   :link '(custom-manual "(gnus)Customizing Articles")
1399   :type gnus-article-treat-custom)
1400 (put 'gnus-treat-overstrike 'highlight t)
1401
1402 (defcustom gnus-treat-ansi-sequences (if (locate-library "ansi-color") t)
1403   "Treat ANSI SGR control sequences.
1404 Valid values are nil, t, `head', `first', `last', an integer or a
1405 predicate.  See Info node `(gnus)Customizing Articles'."
1406   :group 'gnus-article-treat
1407   :link '(custom-manual "(gnus)Customizing Articles")
1408   :type gnus-article-treat-custom)
1409
1410 (make-obsolete-variable 'gnus-treat-display-xface
1411                         'gnus-treat-display-x-face)
1412
1413 (defcustom gnus-treat-display-x-face
1414   (and (not noninteractive)
1415        (gnus-image-type-available-p 'xbm)
1416        (if (featurep 'xemacs)
1417            (featurep 'xface)
1418          (and (string-match "^0x" (shell-command-to-string "uncompface"))
1419               (executable-find "icontopbm")))
1420        'head)
1421   "Display X-Face headers.
1422 Valid values are nil and `head'.
1423 See Info node `(gnus)Customizing Articles' and Info node
1424 `(gnus)X-Face' for details."
1425   :group 'gnus-article-treat
1426   :version "21.1"
1427   :link '(custom-manual "(gnus)Customizing Articles")
1428   :link '(custom-manual "(gnus)X-Face")
1429   :type gnus-article-treat-head-custom
1430   :set (lambda (symbol value)
1431          (set-default
1432           symbol
1433           (cond ((or (boundp symbol) (get symbol 'saved-value))
1434                  value)
1435                 ((boundp 'gnus-treat-display-xface)
1436                  (message "\
1437 ** gnus-treat-display-xface is an obsolete variable;\
1438  use gnus-treat-display-x-face instead")
1439                  (default-value 'gnus-treat-display-xface))
1440                 ((get 'gnus-treat-display-xface 'saved-value)
1441                  (message "\
1442 ** gnus-treat-display-xface is an obsolete variable;\
1443  use gnus-treat-display-x-face instead")
1444                  (eval (car (get 'gnus-treat-display-xface 'saved-value))))
1445                 (t
1446                  value)))))
1447 (put 'gnus-treat-display-x-face 'highlight t)
1448
1449 (defcustom gnus-treat-display-face
1450   (and (not noninteractive)
1451        (gnus-image-type-available-p 'png)
1452        'head)
1453   "Display Face headers.
1454 Valid values are nil, t, `head', `first', `last', an integer or a
1455 predicate.  See Info node `(gnus)Customizing Articles' and Info
1456 node `(gnus)X-Face' for details."
1457   :group 'gnus-article-treat
1458   :version "22.1"
1459   :link '(custom-manual "(gnus)Customizing Articles")
1460   :link '(custom-manual "(gnus)X-Face")
1461   :type gnus-article-treat-head-custom)
1462 (put 'gnus-treat-display-face 'highlight t)
1463
1464 (defcustom gnus-treat-display-smileys (gnus-image-type-available-p 'xpm)
1465   "Display smileys.
1466 Valid values are nil, t, `head', `first', `last', an integer or a
1467 predicate.  See Info node `(gnus)Customizing Articles' and Info
1468 node `(gnus)Smileys' for details."
1469   :group 'gnus-article-treat
1470   :version "21.1"
1471   :link '(custom-manual "(gnus)Customizing Articles")
1472   :link '(custom-manual "(gnus)Smileys")
1473   :type gnus-article-treat-custom)
1474 (put 'gnus-treat-display-smileys 'highlight t)
1475
1476 (defcustom gnus-treat-from-picon
1477   (if (and (gnus-image-type-available-p 'xpm)
1478            (gnus-picons-installed-p))
1479       'head nil)
1480   "Display picons in the From header.
1481 Valid values are nil, t, `head', `first', `last', an integer or a
1482 predicate.  See Info node `(gnus)Customizing Articles' and Info
1483 node `(gnus)Picons' for details."
1484   :version "22.1"
1485   :group 'gnus-article-treat
1486   :group 'gnus-picon
1487   :link '(custom-manual "(gnus)Customizing Articles")
1488   :link '(custom-manual "(gnus)Picons")
1489   :type gnus-article-treat-head-custom)
1490 (put 'gnus-treat-from-picon 'highlight t)
1491
1492 (defcustom gnus-treat-mail-picon
1493   (if (and (gnus-image-type-available-p 'xpm)
1494            (gnus-picons-installed-p))
1495       'head nil)
1496   "Display picons in To and Cc headers.
1497 Valid values are nil, t, `head', `first', `last', an integer or a
1498 predicate.  See Info node `(gnus)Customizing Articles' and Info
1499 node `(gnus)Picons' for details."
1500   :version "22.1"
1501   :group 'gnus-article-treat
1502   :group 'gnus-picon
1503   :link '(custom-manual "(gnus)Customizing Articles")
1504   :link '(custom-manual "(gnus)Picons")
1505   :type gnus-article-treat-head-custom)
1506 (put 'gnus-treat-mail-picon 'highlight t)
1507
1508 (defcustom gnus-treat-newsgroups-picon
1509   (if (and (gnus-image-type-available-p 'xpm)
1510            (gnus-picons-installed-p))
1511       'head nil)
1512   "Display picons in the Newsgroups and Followup-To headers.
1513 Valid values are nil, t, `head', `first', `last', an integer or a
1514 predicate.  See Info node `(gnus)Customizing Articles' and Info
1515 node `(gnus)Picons' for details."
1516   :version "22.1"
1517   :group 'gnus-article-treat
1518   :group 'gnus-picon
1519   :link '(custom-manual "(gnus)Customizing Articles")
1520   :link '(custom-manual "(gnus)Picons")
1521   :type gnus-article-treat-head-custom)
1522 (put 'gnus-treat-newsgroups-picon 'highlight t)
1523
1524 (defcustom gnus-treat-body-boundary
1525   (if (or gnus-treat-newsgroups-picon
1526           gnus-treat-mail-picon
1527           gnus-treat-from-picon)
1528       ;; If there's much decoration, the user might prefer a boundery.
1529       'head
1530     nil)
1531   "Draw a boundary at the end of the headers.
1532 Valid values are nil and `head'.
1533 See Info node `(gnus)Customizing Articles' for details."
1534   :version "22.1"
1535   :group 'gnus-article-treat
1536   :link '(custom-manual "(gnus)Customizing Articles")
1537   :type gnus-article-treat-head-custom)
1538
1539 (defcustom gnus-treat-capitalize-sentences nil
1540   "Capitalize sentence-starting words.
1541 Valid values are nil, t, `head', `first', `last', an integer or a
1542 predicate.  See Info node `(gnus)Customizing Articles'."
1543   :version "21.1"
1544   :group 'gnus-article-treat
1545   :link '(custom-manual "(gnus)Customizing Articles")
1546   :type gnus-article-treat-custom)
1547
1548 (defcustom gnus-treat-wash-html nil
1549   "Format as HTML.
1550 Valid values are nil, t, `head', `first', `last', an integer or a
1551 predicate.  See Info node `(gnus)Customizing Articles'."
1552   :version "22.1"
1553   :group 'gnus-article-treat
1554   :link '(custom-manual "(gnus)Customizing Articles")
1555   :type gnus-article-treat-custom)
1556
1557 (defcustom gnus-treat-fill-long-lines nil
1558   "Fill long lines.
1559 Valid values are nil, t, `head', `first', `last', an integer or a
1560 predicate.  See Info node `(gnus)Customizing Articles'."
1561   :group 'gnus-article-treat
1562   :link '(custom-manual "(gnus)Customizing Articles")
1563   :type gnus-article-treat-custom)
1564
1565 (defcustom gnus-treat-play-sounds nil
1566   "Play sounds.
1567 Valid values are nil, t, `head', `first', `last', an integer or a
1568 predicate.  See Info node `(gnus)Customizing Articles'."
1569   :version "21.1"
1570   :group 'gnus-article-treat
1571   :link '(custom-manual "(gnus)Customizing Articles")
1572   :type gnus-article-treat-custom)
1573
1574 (defcustom gnus-treat-translate nil
1575   "Translate articles from one language to another.
1576 Valid values are nil, t, `head', `first', `last', an integer or a
1577 predicate.  See Info node `(gnus)Customizing Articles'."
1578   :version "21.1"
1579   :group 'gnus-article-treat
1580   :link '(custom-manual "(gnus)Customizing Articles")
1581   :type gnus-article-treat-custom)
1582
1583 (defcustom gnus-treat-x-pgp-sig nil
1584   "Verify X-PGP-Sig.
1585 To automatically treat X-PGP-Sig, set it to head.
1586 Valid values are nil, t, `head', `first', `last', an integer or a
1587 predicate.  See Info node `(gnus)Customizing Articles'."
1588   :version "22.1"
1589   :group 'gnus-article-treat
1590   :group 'mime-security
1591   :link '(custom-manual "(gnus)Customizing Articles")
1592   :type gnus-article-treat-custom)
1593
1594 (defvar gnus-article-encrypt-protocol-alist
1595   '(("PGP" . mml2015-self-encrypt)))
1596
1597 ;; Set to nil if more than one protocol added to
1598 ;; gnus-article-encrypt-protocol-alist.
1599 (defcustom gnus-article-encrypt-protocol "PGP"
1600   "The protocol used for encrypt articles.
1601 It is a string, such as \"PGP\". If nil, ask user."
1602   :version "22.1"
1603   :type 'string
1604   :group 'mime-security)
1605
1606 (defvar gnus-article-wash-function nil
1607   "Function used for converting HTML into text.")
1608
1609 (defcustom gnus-use-idna (and (condition-case nil (require 'idna) (file-error))
1610                               (mm-coding-system-p 'utf-8)
1611                               (executable-find idna-program))
1612   "Whether IDNA decoding of headers is used when viewing messages.
1613 This requires GNU Libidn, and by default only enabled if it is found."
1614   :version "22.1"
1615   :group 'gnus-article-headers
1616   :type 'boolean)
1617
1618 (defcustom gnus-article-over-scroll nil
1619   "If non-nil, allow scrolling the article buffer even when there no more text."
1620   :version "22.1"
1621   :group 'gnus-article
1622   :type 'boolean)
1623
1624 ;;; Internal variables
1625
1626 (defvar gnus-english-month-names
1627   '("January" "February" "March" "April" "May" "June" "July" "August"
1628     "September" "October" "November" "December"))
1629
1630 (defvar article-goto-body-goes-to-point-min-p nil)
1631 (defvar gnus-article-wash-types nil)
1632 (defvar gnus-article-emphasis-alist nil)
1633 (defvar gnus-article-image-alist nil)
1634
1635 (defvar gnus-article-mime-handle-alist-1 nil)
1636 (defvar gnus-treatment-function-alist
1637   '((gnus-treat-x-pgp-sig gnus-article-verify-x-pgp-sig)
1638     (gnus-treat-strip-banner gnus-article-strip-banner)
1639     (gnus-treat-strip-headers-in-body gnus-article-strip-headers-in-body)
1640     (gnus-treat-highlight-signature gnus-article-highlight-signature)
1641     (gnus-treat-buttonize gnus-article-add-buttons)
1642     (gnus-treat-fill-article gnus-article-fill-cited-article)
1643     (gnus-treat-fill-long-lines gnus-article-fill-long-lines)
1644     (gnus-treat-strip-cr gnus-article-remove-cr)
1645     (gnus-treat-unsplit-urls gnus-article-unsplit-urls)
1646     (gnus-treat-date-ut gnus-article-date-ut)
1647     (gnus-treat-date-local gnus-article-date-local)
1648     (gnus-treat-date-english gnus-article-date-english)
1649     (gnus-treat-date-original gnus-article-date-original)
1650     (gnus-treat-date-user-defined gnus-article-date-user)
1651     (gnus-treat-date-iso8601 gnus-article-date-iso8601)
1652     (gnus-treat-date-lapsed gnus-article-date-lapsed)
1653     (gnus-treat-display-x-face gnus-article-display-x-face)
1654     (gnus-treat-display-face gnus-article-display-face)
1655     (gnus-treat-hide-headers gnus-article-maybe-hide-headers)
1656     (gnus-treat-hide-boring-headers gnus-article-hide-boring-headers)
1657     (gnus-treat-hide-signature gnus-article-hide-signature)
1658     (gnus-treat-strip-list-identifiers gnus-article-hide-list-identifiers)
1659     (gnus-treat-leading-whitespace gnus-article-remove-leading-whitespace)
1660     (gnus-treat-strip-pem gnus-article-hide-pem)
1661     (gnus-treat-from-picon gnus-treat-from-picon)
1662     (gnus-treat-mail-picon gnus-treat-mail-picon)
1663     (gnus-treat-newsgroups-picon gnus-treat-newsgroups-picon)
1664     (gnus-treat-highlight-headers gnus-article-highlight-headers)
1665     (gnus-treat-highlight-signature gnus-article-highlight-signature)
1666     (gnus-treat-strip-trailing-blank-lines
1667      gnus-article-remove-trailing-blank-lines)
1668     (gnus-treat-strip-leading-blank-lines
1669      gnus-article-strip-leading-blank-lines)
1670     (gnus-treat-strip-multiple-blank-lines
1671      gnus-article-strip-multiple-blank-lines)
1672     (gnus-treat-overstrike gnus-article-treat-overstrike)
1673     (gnus-treat-ansi-sequences gnus-article-treat-ansi-sequences)
1674     (gnus-treat-unfold-headers gnus-article-treat-unfold-headers)
1675     (gnus-treat-fold-newsgroups gnus-article-treat-fold-newsgroups)
1676     (gnus-treat-fold-headers gnus-article-treat-fold-headers)
1677     (gnus-treat-buttonize-head gnus-article-add-buttons-to-head)
1678     (gnus-treat-display-smileys gnus-treat-smiley)
1679     (gnus-treat-capitalize-sentences gnus-article-capitalize-sentences)
1680     (gnus-treat-wash-html gnus-article-wash-html)
1681     (gnus-treat-emphasize gnus-article-emphasize)
1682     (gnus-treat-hide-citation gnus-article-hide-citation)
1683     (gnus-treat-hide-citation-maybe gnus-article-hide-citation-maybe)
1684     (gnus-treat-highlight-citation gnus-article-highlight-citation)
1685     (gnus-treat-body-boundary gnus-article-treat-body-boundary)
1686     (gnus-treat-play-sounds gnus-earcon-display)))
1687
1688 (defvar gnus-article-mime-handle-alist nil)
1689 (defvar article-lapsed-timer nil)
1690 (defvar gnus-article-current-summary nil)
1691
1692 (defvar gnus-article-mode-syntax-table
1693   (let ((table (copy-syntax-table text-mode-syntax-table)))
1694     ;; This causes the citation match run O(2^n).
1695     ;; (modify-syntax-entry ?- "w" table)
1696     (modify-syntax-entry ?> ")<" table)
1697     (modify-syntax-entry ?< "(>" table)
1698     ;; make M-. in article buffers work for `foo' strings
1699     (modify-syntax-entry ?' " " table)
1700     (modify-syntax-entry ?` " " table)
1701     table)
1702   "Syntax table used in article mode buffers.
1703 Initialized from `text-mode-syntax-table.")
1704
1705 (defvar gnus-save-article-buffer nil)
1706
1707 (defvar gnus-number-of-articles-to-be-saved nil)
1708
1709 (defvar gnus-inhibit-hiding nil)
1710
1711 (defvar gnus-article-edit-mode nil)
1712
1713 ;;; Macros for dealing with the article buffer.
1714
1715 (defmacro gnus-with-article-headers (&rest forms)
1716   `(with-current-buffer gnus-article-buffer
1717      (save-restriction
1718        (let ((inhibit-read-only t)
1719              (inhibit-point-motion-hooks t)
1720              (case-fold-search t))
1721          (article-narrow-to-head)
1722          ,@forms))))
1723
1724 (put 'gnus-with-article-headers 'lisp-indent-function 0)
1725 (put 'gnus-with-article-headers 'edebug-form-spec '(body))
1726
1727 (defmacro gnus-with-article-buffer (&rest forms)
1728   `(with-current-buffer gnus-article-buffer
1729      (let ((inhibit-read-only t))
1730        ,@forms)))
1731
1732 (put 'gnus-with-article-buffer 'lisp-indent-function 0)
1733 (put 'gnus-with-article-buffer 'edebug-form-spec '(body))
1734
1735 (defun gnus-article-goto-header (header)
1736   "Go to HEADER, which is a regular expression."
1737   (re-search-forward (concat "^\\(" header "\\):") nil t))
1738
1739 (defsubst gnus-article-hide-text (b e props)
1740   "Set text PROPS on the B to E region, extending `intangible' 1 past B."
1741   (gnus-add-text-properties-when 'article-type nil b e props)
1742   (when (memq 'intangible props)
1743     (put-text-property
1744      (max (1- b) (point-min))
1745      b 'intangible (cddr (memq 'intangible props)))))
1746
1747 (defsubst gnus-article-unhide-text (b e)
1748   "Remove hidden text properties from region between B and E."
1749   (remove-text-properties b e gnus-hidden-properties)
1750   (when (memq 'intangible gnus-hidden-properties)
1751     (put-text-property (max (1- b) (point-min))
1752                        b 'intangible nil)))
1753
1754 (defun gnus-article-hide-text-type (b e type)
1755   "Hide text of TYPE between B and E."
1756   (gnus-add-wash-type type)
1757   (gnus-article-hide-text
1758    b e (cons 'article-type (cons type gnus-hidden-properties))))
1759
1760 (defun gnus-article-unhide-text-type (b e type)
1761   "Unhide text of TYPE between B and E."
1762   (gnus-delete-wash-type type)
1763   (remove-text-properties
1764    b e (cons 'article-type (cons type gnus-hidden-properties)))
1765   (when (memq 'intangible gnus-hidden-properties)
1766     (put-text-property (max (1- b) (point-min))
1767                        b 'intangible nil)))
1768
1769 (defun gnus-article-hide-text-of-type (type)
1770   "Hide text of TYPE in the current buffer."
1771   (save-excursion
1772     (let ((b (point-min))
1773           (e (point-max)))
1774       (while (setq b (text-property-any b e 'article-type type))
1775         (add-text-properties b (incf b) gnus-hidden-properties)))))
1776
1777 (defun gnus-article-delete-text-of-type (type)
1778   "Delete text of TYPE in the current buffer."
1779   (save-excursion
1780     (let ((b (point-min)))
1781       (if (eq type 'multipart)
1782           ;; Remove MIME buttons associated with multipart/alternative parts.
1783           (progn
1784             (goto-char b)
1785             (while (if (get-text-property (point) 'gnus-part)
1786                        (setq b (point))
1787                      (when (setq b (next-single-property-change (point)
1788                                                                 'gnus-part))
1789                        (goto-char b)
1790                        t))
1791               (end-of-line)
1792               (skip-chars-forward "\n")
1793               (when (eq (get-text-property b 'article-type) 'multipart)
1794                 (delete-region b (point)))))
1795         (while (setq b (text-property-any b (point-max) 'article-type type))
1796           (delete-region
1797            b (or (text-property-not-all b (point-max) 'article-type type)
1798                  (point-max))))))))
1799
1800 (defun gnus-article-delete-invisible-text ()
1801   "Delete all invisible text in the current buffer."
1802   (save-excursion
1803     (let ((b (point-min)))
1804       (while (setq b (text-property-any b (point-max) 'invisible t))
1805         (delete-region
1806          b (or (text-property-not-all b (point-max) 'invisible t)
1807                (point-max)))))))
1808
1809 (defun gnus-article-text-type-exists-p (type)
1810   "Say whether any text of type TYPE exists in the buffer."
1811   (text-property-any (point-min) (point-max) 'article-type type))
1812
1813 (defsubst gnus-article-header-rank ()
1814   "Give the rank of the string HEADER as given by `gnus-sorted-header-list'."
1815   (let ((list gnus-sorted-header-list)
1816         (i 1))
1817     (while list
1818       (if (looking-at (car list))
1819           (setq list nil)
1820         (setq list (cdr list))
1821         (incf i)))
1822       i))
1823
1824 (defun article-hide-headers (&optional arg delete)
1825   "Hide unwanted headers and possibly sort them as well."
1826   (interactive)
1827   ;; This function might be inhibited.
1828   (unless gnus-inhibit-hiding
1829     (let ((inhibit-read-only t)
1830           (case-fold-search t)
1831           (max (1+ (length gnus-sorted-header-list)))
1832           (inhibit-point-motion-hooks t)
1833           (cur (current-buffer))
1834           ignored visible beg)
1835       (save-excursion
1836         ;; `gnus-ignored-headers' and `gnus-visible-headers' may be
1837         ;; group parameters, so we should go to the summary buffer.
1838         (when (prog1
1839                   (condition-case nil
1840                       (progn (set-buffer gnus-summary-buffer) t)
1841                     (error nil))
1842                 (setq ignored (when (not gnus-visible-headers)
1843                                 (cond ((stringp gnus-ignored-headers)
1844                                        gnus-ignored-headers)
1845                                       ((listp gnus-ignored-headers)
1846                                        (mapconcat 'identity
1847                                                   gnus-ignored-headers
1848                                                   "\\|"))))
1849                       visible (cond ((stringp gnus-visible-headers)
1850                                      gnus-visible-headers)
1851                                     ((and gnus-visible-headers
1852                                           (listp gnus-visible-headers))
1853                                      (mapconcat 'identity
1854                                                 gnus-visible-headers
1855                                                 "\\|")))))
1856           (set-buffer cur))
1857         (save-restriction
1858           ;; First we narrow to just the headers.
1859           (article-narrow-to-head)
1860           ;; Hide any "From " lines at the beginning of (mail) articles.
1861           (while (looking-at "From ")
1862             (forward-line 1))
1863           (unless (bobp)
1864             (delete-region (point-min) (point)))
1865           ;; Then treat the rest of the header lines.
1866           ;; Then we use the two regular expressions
1867           ;; `gnus-ignored-headers' and `gnus-visible-headers' to
1868           ;; select which header lines is to remain visible in the
1869           ;; article buffer.
1870           (while (re-search-forward "^[^ \t:]*:" nil t)
1871             (beginning-of-line)
1872             ;; Mark the rank of the header.
1873             (put-text-property
1874              (point) (1+ (point)) 'message-rank
1875              (if (or (and visible (looking-at visible))
1876                      (and ignored
1877                           (not (looking-at ignored))))
1878                  (gnus-article-header-rank)
1879                (+ 2 max)))
1880             (forward-line 1))
1881           (message-sort-headers-1)
1882           (when (setq beg (text-property-any
1883                            (point-min) (point-max) 'message-rank (+ 2 max)))
1884             ;; We delete the unwanted headers.
1885             (gnus-add-wash-type 'headers)
1886             (add-text-properties (point-min) (+ 5 (point-min))
1887                                  '(article-type headers dummy-invisible t))
1888             (delete-region beg (point-max))))))))
1889
1890 (defun article-hide-boring-headers (&optional arg)
1891   "Toggle hiding of headers that aren't very interesting.
1892 If given a negative prefix, always show; if given a positive prefix,
1893 always hide."
1894   (interactive (gnus-article-hidden-arg))
1895   (when (and (not (gnus-article-check-hidden-text 'boring-headers arg))
1896              (not gnus-show-all-headers))
1897     (save-excursion
1898       (save-restriction
1899         (let ((inhibit-read-only t)
1900               (inhibit-point-motion-hooks t))
1901           (article-narrow-to-head)
1902           (dolist (elem gnus-boring-article-headers)
1903             (goto-char (point-min))
1904             (cond
1905              ;; Hide empty headers.
1906              ((eq elem 'empty)
1907               (while (re-search-forward "^[^: \t]+:[ \t]*\n[^ \t]" nil t)
1908                 (forward-line -1)
1909                 (gnus-article-hide-text-type
1910                  (point-at-bol)
1911                  (progn
1912                    (end-of-line)
1913                    (if (re-search-forward "^[^ \t]" nil t)
1914                        (match-beginning 0)
1915                      (point-max)))
1916                  'boring-headers)))
1917              ;; Hide boring Newsgroups header.
1918              ((eq elem 'newsgroups)
1919               (when (gnus-string-equal
1920                      (gnus-fetch-field "newsgroups")
1921                      (gnus-group-real-name
1922                       (if (boundp 'gnus-newsgroup-name)
1923                           gnus-newsgroup-name
1924                         "")))
1925                 (gnus-article-hide-header "newsgroups")))
1926              ((eq elem 'to-address)
1927               (let ((to (message-fetch-field "to"))
1928                     (to-address
1929                      (gnus-parameter-to-address
1930                       (if (boundp 'gnus-newsgroup-name)
1931                           gnus-newsgroup-name ""))))
1932                 (when (and to to-address
1933                            (ignore-errors
1934                              (gnus-string-equal
1935                               ;; only one address in To
1936                               (nth 1 (mail-extract-address-components to))
1937                               to-address)))
1938                   (gnus-article-hide-header "to"))))
1939              ((eq elem 'to-list)
1940               (let ((to (message-fetch-field "to"))
1941                     (to-list
1942                      (gnus-parameter-to-list
1943                       (if (boundp 'gnus-newsgroup-name)
1944                           gnus-newsgroup-name ""))))
1945                 (when (and to to-list
1946                            (ignore-errors
1947                              (gnus-string-equal
1948                               ;; only one address in To
1949                               (nth 1 (mail-extract-address-components to))
1950                               to-list)))
1951                   (gnus-article-hide-header "to"))))
1952              ((eq elem 'cc-list)
1953               (let ((cc (message-fetch-field "cc"))
1954                     (to-list
1955                      (gnus-parameter-to-list
1956                       (if (boundp 'gnus-newsgroup-name)
1957                           gnus-newsgroup-name ""))))
1958                 (when (and cc to-list
1959                            (ignore-errors
1960                              (gnus-string-equal
1961                               ;; only one address in CC
1962                               (nth 1 (mail-extract-address-components cc))
1963                               to-list)))
1964                   (gnus-article-hide-header "cc"))))
1965              ((eq elem 'followup-to)
1966               (when (gnus-string-equal
1967                      (message-fetch-field "followup-to")
1968                      (message-fetch-field "newsgroups"))
1969                 (gnus-article-hide-header "followup-to")))
1970              ((eq elem 'reply-to)
1971               (if (gnus-group-find-parameter
1972                    gnus-newsgroup-name 'broken-reply-to)
1973                   (gnus-article-hide-header "reply-to")
1974                 (let ((from (message-fetch-field "from"))
1975                       (reply-to (message-fetch-field "reply-to")))
1976                   (when
1977                       (and
1978                        from reply-to
1979                        (ignore-errors
1980                          (equal
1981                           (sort (mapcar
1982                                  (lambda (x) (downcase (cadr x)))
1983                                  (mail-extract-address-components from t))
1984                                 'string<)
1985                           (sort (mapcar
1986                                  (lambda (x) (downcase (cadr x)))
1987                                  (mail-extract-address-components reply-to t))
1988                                 'string<))))
1989                     (gnus-article-hide-header "reply-to")))))
1990              ((eq elem 'date)
1991               (let ((date (with-current-buffer gnus-original-article-buffer
1992                             ;; If date in `gnus-article-buffer' is localized
1993                             ;; (`gnus-treat-date-user-defined'),
1994                             ;; `days-between' might fail.
1995                             (message-fetch-field "date"))))
1996                 (when (and date
1997                            (< (days-between (current-time-string) date)
1998                               4))
1999                   (gnus-article-hide-header "date"))))
2000              ((eq elem 'long-to)
2001               (let ((to (message-fetch-field "to"))
2002                     (cc (message-fetch-field "cc")))
2003                 (when (> (length to) 1024)
2004                   (gnus-article-hide-header "to"))
2005                 (when (> (length cc) 1024)
2006                   (gnus-article-hide-header "cc"))))
2007              ((eq elem 'many-to)
2008               (let ((to-count 0)
2009                     (cc-count 0))
2010                 (goto-char (point-min))
2011                 (while (re-search-forward "^to:" nil t)
2012                   (setq to-count (1+ to-count)))
2013                 (when (> to-count 1)
2014                   (while (> to-count 0)
2015                     (goto-char (point-min))
2016                     (save-restriction
2017                       (re-search-forward "^to:" nil nil to-count)
2018                       (forward-line -1)
2019                       (narrow-to-region (point) (point-max))
2020                       (gnus-article-hide-header "to"))
2021                     (setq to-count (1- to-count))))
2022                 (goto-char (point-min))
2023                 (while (re-search-forward "^cc:" nil t)
2024                   (setq cc-count (1+ cc-count)))
2025                 (when (> cc-count 1)
2026                   (while (> cc-count 0)
2027                     (goto-char (point-min))
2028                     (save-restriction
2029                       (re-search-forward "^cc:" nil nil cc-count)
2030                       (forward-line -1)
2031                       (narrow-to-region (point) (point-max))
2032                       (gnus-article-hide-header "cc"))
2033                     (setq cc-count (1- cc-count)))))))))))))
2034
2035 (defun gnus-article-hide-header (header)
2036   (save-excursion
2037     (goto-char (point-min))
2038     (when (re-search-forward (concat "^" header ":") nil t)
2039       (gnus-article-hide-text-type
2040        (point-at-bol)
2041        (progn
2042          (end-of-line)
2043          (if (re-search-forward "^[^ \t]" nil t)
2044              (match-beginning 0)
2045            (point-max)))
2046        'boring-headers))))
2047
2048 (defvar gnus-article-normalized-header-length 40
2049   "Length of normalized headers.")
2050
2051 (defun article-normalize-headers ()
2052   "Make all header lines 40 characters long."
2053   (interactive)
2054   (let ((inhibit-read-only t)
2055         column)
2056     (save-excursion
2057       (save-restriction
2058         (article-narrow-to-head)
2059         (while (not (eobp))
2060           (cond
2061            ((< (setq column (- (point-at-eol) (point)))
2062                gnus-article-normalized-header-length)
2063             (end-of-line)
2064             (insert (make-string
2065                      (- gnus-article-normalized-header-length column)
2066                      ? )))
2067            ((> column gnus-article-normalized-header-length)
2068             (gnus-put-text-property
2069              (progn
2070                (forward-char gnus-article-normalized-header-length)
2071                (point))
2072              (point-at-eol)
2073              'invisible t))
2074            (t
2075             ;; Do nothing.
2076             ))
2077           (forward-line 1))))))
2078
2079 (defun article-treat-dumbquotes ()
2080   "Translate M****s*** sm*rtq**t*s and other symbols into proper text.
2081 Note that this function guesses whether a character is a sm*rtq**t* or
2082 not, so it should only be used interactively.
2083
2084 Sm*rtq**t*s are M****s***'s unilateral extension to the
2085 iso-8859-1 character map in an attempt to provide more quoting
2086 characters.  If you see something like \\222 or \\264 where
2087 you're expecting some kind of apostrophe or quotation mark, then
2088 try this wash."
2089   (interactive)
2090   (article-translate-strings gnus-article-dumbquotes-map))
2091
2092 (defun article-translate-characters (from to)
2093   "Translate all characters in the body of the article according to FROM and TO.
2094 FROM is a string of characters to translate from; to is a string of
2095 characters to translate to."
2096   (save-excursion
2097     (when (article-goto-body)
2098       (let ((inhibit-read-only t)
2099             (x (make-string 225 ?x))
2100             (i -1))
2101         (while (< (incf i) (length x))
2102           (aset x i i))
2103         (setq i 0)
2104         (while (< i (length from))
2105           (aset x (aref from i) (aref to i))
2106           (incf i))
2107         (translate-region (point) (point-max) x)))))
2108
2109 (defun article-translate-strings (map)
2110   "Translate all string in the body of the article according to MAP.
2111 MAP is an alist where the elements are on the form (\"from\" \"to\")."
2112   (save-excursion
2113     (when (article-goto-body)
2114       (let ((inhibit-read-only t))
2115         (dolist (elem map)
2116           (save-excursion
2117             (while (search-forward (car elem) nil t)
2118               (replace-match (cadr elem)))))))))
2119
2120 (defun article-treat-overstrike ()
2121   "Translate overstrikes into bold text."
2122   (interactive)
2123   (save-excursion
2124     (when (article-goto-body)
2125       (let ((inhibit-read-only t))
2126         (while (search-forward "\b" nil t)
2127           (let ((next (char-after))
2128                 (previous (char-after (- (point) 2))))
2129             ;; We do the boldification/underlining by hiding the
2130             ;; overstrikes and putting the proper text property
2131             ;; on the letters.
2132             (cond
2133              ((eq next previous)
2134               (gnus-article-hide-text-type (- (point) 2) (point) 'overstrike)
2135               (put-text-property (point) (1+ (point)) 'face 'bold))
2136              ((eq next ?_)
2137               (gnus-article-hide-text-type
2138                (1- (point)) (1+ (point)) 'overstrike)
2139               (put-text-property
2140                (- (point) 2) (1- (point)) 'face 'underline))
2141              ((eq previous ?_)
2142               (gnus-article-hide-text-type (- (point) 2) (point) 'overstrike)
2143               (put-text-property
2144                (point) (1+ (point)) 'face 'underline)))))))))
2145
2146 (defun article-treat-ansi-sequences ()
2147   "Translate ANSI SGR control sequences into overlays or extents."
2148   (interactive)
2149   (save-excursion
2150     (when (article-goto-body)
2151       (let ((inhibit-read-only t))
2152         (ansi-color-apply-on-region (point) (point-max))))))
2153
2154 (defun gnus-article-treat-unfold-headers ()
2155   "Unfold folded message headers.
2156 Only the headers that fit into the current window width will be
2157 unfolded."
2158   (interactive)
2159   (gnus-with-article-headers
2160     (let (length)
2161       (while (not (eobp))
2162         (save-restriction
2163           (mail-header-narrow-to-field)
2164           (let* ((header (buffer-string))
2165                  (unfoldable
2166                   (or (equal gnus-article-unfold-long-headers t)
2167                       (and (stringp gnus-article-unfold-long-headers)
2168                            (string-match gnus-article-unfold-long-headers header)))))
2169             (with-temp-buffer
2170               (insert header)
2171               (goto-char (point-min))
2172               (while (re-search-forward "\n[\t ]" nil t)
2173                 (replace-match " " t t)))
2174             (setq length (- (point-max) (point-min) 1))
2175             (when (or unfoldable
2176                       (< length (window-width)))
2177               (while (re-search-forward "\n[\t ]" nil t)
2178                 (replace-match " " t t))))
2179           (goto-char (point-max)))))))
2180
2181 (defun gnus-article-treat-fold-headers ()
2182   "Fold message headers."
2183   (interactive)
2184   (gnus-with-article-headers
2185     (while (not (eobp))
2186       (save-restriction
2187         (mail-header-narrow-to-field)
2188         (mail-header-fold-field)
2189         (goto-char (point-max))))))
2190
2191 (defun gnus-treat-smiley ()
2192   "Toggle display of textual emoticons (\"smileys\") as small graphical icons."
2193   (interactive)
2194   (gnus-with-article-buffer
2195     (if (memq 'smiley gnus-article-wash-types)
2196         (gnus-delete-images 'smiley)
2197       (article-goto-body)
2198       (let ((images (smiley-region (point) (point-max))))
2199         (when images
2200           (gnus-add-wash-type 'smiley)
2201           (dolist (image images)
2202             (gnus-add-image 'smiley image)))))))
2203
2204 (defun gnus-article-remove-images ()
2205   "Remove all images from the article buffer."
2206   (interactive)
2207   (gnus-with-article-buffer
2208     (dolist (elem gnus-article-image-alist)
2209       (gnus-delete-images (car elem)))))
2210
2211 (defun gnus-article-treat-fold-newsgroups ()
2212   "Unfold folded message headers.
2213 Only the headers that fit into the current window width will be
2214 unfolded."
2215   (interactive)
2216   (gnus-with-article-headers
2217     (while (gnus-article-goto-header "newsgroups\\|followup-to")
2218       (save-restriction
2219         (mail-header-narrow-to-field)
2220         (while (re-search-forward ", *" nil t)
2221           (replace-match ", " t t))
2222         (mail-header-fold-field)
2223         (goto-char (point-max))))))
2224
2225 (defcustom gnus-article-truncate-lines (default-value 'truncate-lines)
2226   "Value of `truncate-lines' in Gnus Article buffer.
2227 Valid values are nil, t, `head', `first', `last', an integer or a
2228 predicate.  See Info node `(gnus)Customizing Articles'."
2229   :version "23.1" ;; No Gnus
2230   :group 'gnus-article
2231   ;; :link '(custom-manual "(gnus)Customizing Articles")
2232   :type 'boolean)
2233
2234 (defun gnus-article-toggle-truncate-lines (&optional arg)
2235   "Toggle whether to fold or truncate long lines in article the buffer.
2236 If ARG is non-nil and not a number, toggle
2237 `gnus-article-truncate-lines' too.  If ARG is a number, truncate
2238 long lines if and only if arg is positive."
2239   (interactive "P")
2240   (cond
2241    ((and (numberp arg) (> arg 0))
2242     (setq gnus-article-truncate-lines t))
2243    ((numberp arg)
2244     (setq gnus-article-truncate-lines nil))
2245    (arg
2246     (setq gnus-article-truncate-lines
2247           (not gnus-article-truncate-lines))))
2248   (gnus-with-article-buffer
2249     (cond
2250      ((and (numberp arg) (> arg 0))
2251       (setq truncate-lines nil))
2252      ((numberp arg)
2253       (setq truncate-lines t)))
2254     ;; In versions of Emacs 22 (CVS) before 2006-05-26,
2255     ;; `toggle-truncate-lines' needs an argument.
2256     (toggle-truncate-lines)))
2257
2258 (defun gnus-article-treat-body-boundary ()
2259   "Place a boundary line at the end of the headers."
2260   (interactive)
2261   (when (and gnus-body-boundary-delimiter
2262              (> (length gnus-body-boundary-delimiter) 0))
2263     (gnus-with-article-headers
2264       (goto-char (point-max))
2265       (let ((start (point)))
2266         (insert "X-Boundary: ")
2267         (gnus-add-text-properties start (point) '(invisible t intangible t))
2268         (insert (let (str)
2269                   (while (>= (1- (window-width)) (length str))
2270                     (setq str (concat str gnus-body-boundary-delimiter)))
2271                   (substring str 0 (1- (window-width))))
2272                 "\n")
2273         (gnus-put-text-property start (point) 'gnus-decoration 'header)))))
2274
2275 (defun article-fill-long-lines ()
2276   "Fill lines that are wider than the window width."
2277   (interactive)
2278   (save-excursion
2279     (let ((inhibit-read-only t)
2280           (width (window-width (get-buffer-window (current-buffer)))))
2281       (save-restriction
2282         (article-goto-body)
2283         (let ((adaptive-fill-mode nil)) ;Why?  -sm
2284           (while (not (eobp))
2285             (end-of-line)
2286             (when (>= (current-column) (min fill-column width))
2287               (narrow-to-region (min (1+ (point)) (point-max))
2288                                 (point-at-bol))
2289               (let ((goback (point-marker)))
2290                 (fill-paragraph nil)
2291                 (goto-char (marker-position goback)))
2292               (widen))
2293             (forward-line 1)))))))
2294
2295 (defun article-capitalize-sentences ()
2296   "Capitalize the first word in each sentence."
2297   (interactive)
2298   (save-excursion
2299     (let ((inhibit-read-only t)
2300           (paragraph-start "^[\n\^L]"))
2301       (article-goto-body)
2302       (while (not (eobp))
2303         (capitalize-word 1)
2304         (forward-sentence)))))
2305
2306 (defun article-remove-cr ()
2307   "Remove trailing CRs and then translate remaining CRs into LFs."
2308   (interactive)
2309   (save-excursion
2310     (let ((inhibit-read-only t))
2311       (goto-char (point-min))
2312       (while (re-search-forward "\r+$" nil t)
2313         (replace-match "" t t))
2314       (goto-char (point-min))
2315       (while (search-forward "\r" nil t)
2316         (replace-match "\n" t t)))))
2317
2318 (defun article-remove-trailing-blank-lines ()
2319   "Remove all trailing blank lines from the article."
2320   (interactive)
2321   (save-excursion
2322     (let ((inhibit-read-only t))
2323       (goto-char (point-max))
2324       (delete-region
2325        (point)
2326        (progn
2327          (while (and (not (bobp))
2328                      (looking-at "^[ \t]*$")
2329                      (not (gnus-annotation-in-region-p
2330                            (point) (point-at-eol))))
2331            (forward-line -1))
2332          (forward-line 1)
2333          (point))))))
2334
2335 (defvar gnus-face-properties-alist)
2336
2337 (defun article-display-face (&optional force)
2338   "Display any Face headers in the header."
2339   (interactive (list 'force))
2340   (let ((wash-face-p buffer-read-only))
2341     (gnus-with-article-headers
2342       ;; When displaying parts, this function can be called several times on
2343       ;; the same article, without any intended toggle semantic (as typing `W
2344       ;; D d' would have). So face deletion must occur only when we come from
2345       ;; an interactive command, that is when the *Article* buffer is
2346       ;; read-only.
2347       (if (and wash-face-p (memq 'face gnus-article-wash-types))
2348           (gnus-delete-images 'face)
2349         (let ((from (message-fetch-field "from"))
2350               face faces)
2351           (save-current-buffer
2352             (when (and wash-face-p
2353                        (gnus-buffer-live-p gnus-original-article-buffer)
2354                        (not (re-search-forward "^Face:[\t ]*" nil t)))
2355               (set-buffer gnus-original-article-buffer))
2356             (save-restriction
2357               (mail-narrow-to-head)
2358               (when (or force
2359                         ;; Check whether this face is censored.
2360                         (not (and gnus-article-x-face-too-ugly
2361                                   (or from
2362                                       (setq from (message-fetch-field "from")))
2363                                   (string-match gnus-article-x-face-too-ugly
2364                                                 from))))
2365                 (while (gnus-article-goto-header "Face")
2366                   (push (mail-header-field-value) faces)))))
2367           (when faces
2368             (goto-char (point-min))
2369             (let (png image)
2370               (unless (setq from (gnus-article-goto-header "from"))
2371                 (insert "From:")
2372                 (setq from (point))
2373                 (insert " [no `from' set]\n"))
2374               (while faces
2375                 (when (setq png (gnus-convert-face-to-png (pop faces)))
2376                   (setq image
2377                         (apply 'gnus-create-image png 'png t
2378                                (cdr (assq 'png gnus-face-properties-alist))))
2379                   (goto-char from)
2380                   (gnus-add-wash-type 'face)
2381                   (gnus-add-image 'face image)
2382                   (gnus-put-image image nil 'face))))))))))
2383
2384 (defun article-display-x-face (&optional force)
2385   "Look for an X-Face header and display it if present."
2386   (interactive (list 'force))
2387   (let ((wash-face-p buffer-read-only)) ;; When type `W f'
2388     (gnus-with-article-headers
2389       ;; Delete the old process, if any.
2390       (when (process-status "article-x-face")
2391         (delete-process "article-x-face"))
2392       ;; See the comment in `article-display-face'.
2393       (if (and wash-face-p (memq 'xface gnus-article-wash-types))
2394           ;; We have already displayed X-Faces, so we remove them
2395           ;; instead.
2396           (gnus-delete-images 'xface)
2397         ;; Display X-Faces.
2398         (let ((from (message-fetch-field "from"))
2399               x-faces face)
2400           (save-current-buffer
2401             (when (and wash-face-p
2402                        (gnus-buffer-live-p gnus-original-article-buffer)
2403                        (not (re-search-forward "^X-Face:[\t ]*" nil t)))
2404               ;; If type `W f', use gnus-original-article-buffer,
2405               ;; otherwise use the current buffer because displaying
2406               ;; RFC822 parts calls this function too.
2407               (set-buffer gnus-original-article-buffer))
2408             (save-restriction
2409               (mail-narrow-to-head)
2410               (and gnus-article-x-face-command
2411                    (or force
2412                        ;; Check whether this face is censored.
2413                        (not (and gnus-article-x-face-too-ugly
2414                                  (or from
2415                                      (setq from (message-fetch-field "from")))
2416                                  (string-match gnus-article-x-face-too-ugly
2417                                                from))))
2418                    (while (gnus-article-goto-header "X-Face")
2419                      (push (mail-header-field-value) x-faces)))))
2420           (when x-faces
2421             ;; We display the face.
2422             (cond ((functionp gnus-article-x-face-command)
2423                    ;; The command is a lisp function, so we call it.
2424                    (mapc gnus-article-x-face-command x-faces))
2425                   ((stringp gnus-article-x-face-command)
2426                    ;; The command is a string, so we interpret the command
2427                    ;; as a, well, command, and fork it off.
2428                    (let ((process-connection-type nil))
2429                      (gnus-set-process-query-on-exit-flag
2430                       (start-process
2431                        "article-x-face" nil shell-file-name
2432                        shell-command-switch gnus-article-x-face-command)
2433                       nil)
2434                      ;; Sending multiple EOFs to xv doesn't work,
2435                      ;; so we only do a single external face.
2436                      (with-temp-buffer
2437                        (insert (car x-faces))
2438                        (process-send-region "article-x-face"
2439                                             (point-min) (point-max)))
2440                      (process-send-eof "article-x-face")))
2441                   (t
2442                    (error "`%s' set to `%s' is not a function"
2443                           gnus-article-x-face-command
2444                           'gnus-article-x-face-command)))))))))
2445
2446 (defun article-decode-mime-words ()
2447   "Decode all MIME-encoded words in the article."
2448   (interactive)
2449   (gnus-with-article-buffer
2450     (let ((inhibit-point-motion-hooks t)
2451           (mail-parse-charset gnus-newsgroup-charset)
2452           (mail-parse-ignored-charsets
2453            (with-current-buffer gnus-summary-buffer
2454              gnus-newsgroup-ignored-charsets)))
2455       (mail-decode-encoded-word-region (point-min) (point-max)))))
2456
2457 (defun article-decode-charset (&optional prompt)
2458   "Decode charset-encoded text in the article.
2459 If PROMPT (the prefix), prompt for a coding system to use."
2460   (interactive "P")
2461   (let ((inhibit-point-motion-hooks t) (case-fold-search t)
2462         (inhibit-read-only t)
2463         (mail-parse-charset gnus-newsgroup-charset)
2464         (mail-parse-ignored-charsets
2465          (save-excursion (condition-case nil
2466                              (set-buffer gnus-summary-buffer)
2467                            (error))
2468                          gnus-newsgroup-ignored-charsets))
2469         ct cte ctl charset format)
2470     (save-excursion
2471       (save-restriction
2472         (article-narrow-to-head)
2473         (setq ct (message-fetch-field "Content-Type" t)
2474               cte (message-fetch-field "Content-Transfer-Encoding" t)
2475               ctl (and ct (mail-header-parse-content-type ct))
2476               charset (cond
2477                        (prompt
2478                         (mm-read-coding-system "Charset to decode: "))
2479                        (ctl
2480                         (mail-content-type-get ctl 'charset)))
2481               format (and ctl (mail-content-type-get ctl 'format)))
2482         (when cte
2483           (setq cte (mail-header-strip cte)))
2484         (if (and ctl (not (string-match "/" (car ctl))))
2485             (setq ctl nil))
2486         (goto-char (point-max)))
2487       (forward-line 1)
2488       (save-restriction
2489         (narrow-to-region (point) (point-max))
2490         (when (and (eq mail-parse-charset 'gnus-decoded)
2491                    (eq (mm-body-7-or-8) '8bit))
2492           ;; The text code could have been decoded.
2493           (setq charset mail-parse-charset))
2494         (when (and (or (not ctl)
2495                        (equal (car ctl) "text/plain"))
2496                    (not format)) ;; article with format will decode later.
2497           (mm-decode-body
2498            charset (and cte (intern (downcase
2499                                      (gnus-strip-whitespace cte))))
2500            (car ctl)))))))
2501
2502 (defun article-decode-encoded-words ()
2503   "Remove encoded-word encoding from headers."
2504   (let ((inhibit-point-motion-hooks t)
2505         (mail-parse-charset gnus-newsgroup-charset)
2506         (mail-parse-ignored-charsets
2507          (save-excursion (condition-case nil
2508                              (set-buffer gnus-summary-buffer)
2509                            (error))
2510                          gnus-newsgroup-ignored-charsets))
2511         (inhibit-read-only t)
2512         end start)
2513     (goto-char (point-min))
2514     (when (search-forward "\n\n" nil 'move)
2515       (forward-line -1))
2516     (setq end (point))
2517     (while (not (bobp))
2518       (while (progn
2519                (forward-line -1)
2520                (and (not (bobp))
2521                     (memq (char-after) '(?\t ? )))))
2522       (setq start (point))
2523       (if (looking-at "\
2524 \\(?:Resent-\\)?\\(?:From\\|Cc\\|To\\|Bcc\\|\\(?:In-\\)?Reply-To\\|Sender\
2525 \\|Mail-Followup-To\\|Mail-Copies-To\\|Approved\\):")
2526           (funcall gnus-decode-address-function start end)
2527         (funcall gnus-decode-header-function start end))
2528       (goto-char (setq end start)))))
2529
2530 (defun article-decode-group-name ()
2531   "Decode group names in Newsgroups, Followup-To and Xref headers."
2532   (let ((inhibit-point-motion-hooks t)
2533         (inhibit-read-only t)
2534         (method (gnus-find-method-for-group gnus-newsgroup-name))
2535         regexp)
2536     (when (and (or gnus-group-name-charset-method-alist
2537                    gnus-group-name-charset-group-alist)
2538                (gnus-buffer-live-p gnus-original-article-buffer))
2539       (save-restriction
2540         (article-narrow-to-head)
2541         (dolist (header '("Newsgroups" "Followup-To" "Xref"))
2542           (with-current-buffer gnus-original-article-buffer
2543             (goto-char (point-min)))
2544           (setq regexp (concat "^" header
2545                                ":\\([^\n]*\\(?:\n[\t ]+[^\n]+\\)*\\)\n"))
2546           (while (re-search-forward regexp nil t)
2547             (replace-match (save-match-data
2548                              (gnus-decode-newsgroups
2549                               ;; XXX how to use data in article buffer?
2550                               (with-current-buffer gnus-original-article-buffer
2551                                 (re-search-forward regexp nil t)
2552                                 (match-string 1))
2553                               gnus-newsgroup-name method))
2554                            t t nil 1))
2555           (goto-char (point-min)))))))
2556
2557 (autoload 'idna-to-unicode "idna")
2558
2559 (defun article-decode-idna-rhs ()
2560   "Decode IDNA strings in RHS in various headers in current buffer.
2561 The following headers are decoded: From:, To:, Cc:, Reply-To:,
2562 Mail-Reply-To: and Mail-Followup-To:."
2563   (when gnus-use-idna
2564     (save-restriction
2565       (let ((inhibit-point-motion-hooks t)
2566             (inhibit-read-only t))
2567         (article-narrow-to-head)
2568         (goto-char (point-min))
2569         (while (re-search-forward "@[^ \t\n\r,>]*\\(xn--[-A-Za-z0-9.]*\\)[ \t\n\r,>]" nil t)
2570           (let (ace unicode)
2571             (when (save-match-data
2572                     (and (setq ace (match-string 1))
2573                          (save-excursion
2574                            (and (re-search-backward "^[^ \t]" nil t)
2575                                 (looking-at "From\\|To\\|Cc\\|Reply-To\\|Mail-Reply-To\\|Mail-Followup-To")))
2576                          (setq unicode (idna-to-unicode ace))))
2577               (unless (string= ace unicode)
2578                 (replace-match unicode nil nil nil 1)))))))))
2579
2580 (defun article-de-quoted-unreadable (&optional force read-charset)
2581   "Translate a quoted-printable-encoded article.
2582 If FORCE, decode the article whether it is marked as quoted-printable
2583 or not.
2584 If READ-CHARSET, ask for a coding system."
2585   (interactive (list 'force current-prefix-arg))
2586   (save-excursion
2587     (let ((inhibit-read-only t) type charset)
2588       (if (gnus-buffer-live-p gnus-original-article-buffer)
2589           (with-current-buffer gnus-original-article-buffer
2590             (setq type
2591                   (gnus-fetch-field "content-transfer-encoding"))
2592             (let* ((ct (gnus-fetch-field "content-type"))
2593                    (ctl (and ct (mail-header-parse-content-type ct))))
2594               (setq charset (and ctl
2595                                  (mail-content-type-get ctl 'charset)))
2596               (if (stringp charset)
2597                   (setq charset (intern (downcase charset)))))))
2598       (if read-charset
2599           (setq charset (mm-read-coding-system "Charset: " charset)))
2600       (unless charset
2601         (setq charset gnus-newsgroup-charset))
2602       (when (or force
2603                 (and type (let ((case-fold-search t))
2604                             (string-match "quoted-printable" type))))
2605         (article-goto-body)
2606         (quoted-printable-decode-region
2607          (point) (point-max) (mm-charset-to-coding-system charset))))))
2608
2609 (defun article-de-base64-unreadable (&optional force read-charset)
2610   "Translate a base64 article.
2611 If FORCE, decode the article whether it is marked as base64 not.
2612 If READ-CHARSET, ask for a coding system."
2613   (interactive (list 'force current-prefix-arg))
2614   (save-excursion
2615     (let ((inhibit-read-only t) type charset)
2616       (if (gnus-buffer-live-p gnus-original-article-buffer)
2617           (with-current-buffer gnus-original-article-buffer
2618             (setq type
2619                   (gnus-fetch-field "content-transfer-encoding"))
2620             (let* ((ct (gnus-fetch-field "content-type"))
2621                    (ctl (and ct (mail-header-parse-content-type ct))))
2622               (setq charset (and ctl
2623                                  (mail-content-type-get ctl 'charset)))
2624               (if (stringp charset)
2625                   (setq charset (intern (downcase charset)))))))
2626       (if read-charset
2627           (setq charset (mm-read-coding-system "Charset: " charset)))
2628       (unless charset
2629         (setq charset gnus-newsgroup-charset))
2630       (when (or force
2631                 (and type (let ((case-fold-search t))
2632                             (string-match "base64" type))))
2633         (article-goto-body)
2634         (save-restriction
2635           (narrow-to-region (point) (point-max))
2636           (base64-decode-region (point-min) (point-max))
2637           (mm-decode-coding-region
2638            (point-min) (point-max) (mm-charset-to-coding-system charset)))))))
2639
2640 (eval-when-compile
2641   (require 'rfc1843))
2642
2643 (defun article-decode-HZ ()
2644   "Translate a HZ-encoded article."
2645   (interactive)
2646   (require 'rfc1843)
2647   (save-excursion
2648     (let ((inhibit-read-only t))
2649       (rfc1843-decode-region (point-min) (point-max)))))
2650
2651 (defun article-unsplit-urls ()
2652   "Remove the newlines that some other mailers insert into URLs."
2653   (interactive)
2654   (save-excursion
2655     (let ((inhibit-read-only t))
2656       (goto-char (point-min))
2657       (while (re-search-forward
2658               "\\(\\(https?\\|ftp\\)://\\S-+\\) *\n\\(\\S-+\\)" nil t)
2659         (replace-match "\\1\\3" t)))
2660     (when (interactive-p)
2661       (gnus-treat-article nil))))
2662
2663
2664 (defun article-wash-html (&optional read-charset)
2665   "Format an HTML article.
2666 If READ-CHARSET, ask for a coding system.  If it is a number, the
2667 charset defined in `gnus-summary-show-article-charset-alist' is used."
2668   (interactive "P")
2669   (save-excursion
2670     (let ((inhibit-read-only t)
2671           charset)
2672       (if read-charset
2673           (if (or (and (numberp read-charset)
2674                        (setq charset
2675                              (cdr
2676                               (assq read-charset
2677                                     gnus-summary-show-article-charset-alist))))
2678                   (setq charset (mm-read-coding-system "Charset: ")))
2679               (let ((gnus-summary-show-article-charset-alist
2680                      (list (cons 1 charset))))
2681                 (with-current-buffer gnus-summary-buffer
2682                   (gnus-summary-show-article 1)))
2683             (error "No charset is given"))
2684         (when (gnus-buffer-live-p gnus-original-article-buffer)
2685           (with-current-buffer gnus-original-article-buffer
2686             (let* ((ct (gnus-fetch-field "content-type"))
2687                    (ctl (and ct (mail-header-parse-content-type ct))))
2688               (setq charset (and ctl
2689                                  (mail-content-type-get ctl 'charset)))
2690               (when (stringp charset)
2691                 (setq charset (intern (downcase charset)))))))
2692         (unless charset
2693           (setq charset gnus-newsgroup-charset)))
2694       (article-goto-body)
2695       (save-window-excursion
2696         (save-restriction
2697           (narrow-to-region (point) (point-max))
2698           (let* ((func (or gnus-article-wash-function mm-text-html-renderer))
2699                  (entry (assq func mm-text-html-washer-alist)))
2700             (when entry
2701               (setq func (cdr entry)))
2702             (cond
2703              ((functionp func)
2704               (funcall func))
2705              (t
2706               (apply (car func) (cdr func))))))))))
2707
2708 ;; External.
2709 (declare-function w3-region "ext:w3-display" (st nd))
2710
2711 (defun gnus-article-wash-html-with-w3 ()
2712   "Wash the current buffer with w3."
2713   (mm-setup-w3)
2714   (let ((w3-strict-width (window-width))
2715         (url-standalone-mode t)
2716         (url-gateway-unplugged t)
2717         (w3-honor-stylesheets nil))
2718     (condition-case ()
2719         (w3-region (point-min) (point-max))
2720       (error))))
2721
2722 ;; External.
2723 (declare-function w3m-region "ext:w3m" (start end &optional url charset))
2724
2725 (defun gnus-article-wash-html-with-w3m ()
2726   "Wash the current buffer with emacs-w3m."
2727   (mm-setup-w3m)
2728   (let ((w3m-safe-url-regexp mm-w3m-safe-url-regexp)
2729         w3m-force-redisplay)
2730     (w3m-region (point-min) (point-max)))
2731   (when (and mm-inline-text-html-with-w3m-keymap
2732              (boundp 'w3m-minor-mode-map)
2733              w3m-minor-mode-map)
2734     (add-text-properties
2735      (point-min) (point-max)
2736      (list 'keymap w3m-minor-mode-map
2737            ;; Put the mark meaning this part was rendered by emacs-w3m.
2738            'mm-inline-text-html-with-w3m t))))
2739
2740 (defvar charset) ;; Bound by `article-wash-html'.
2741
2742 (defun gnus-article-wash-html-with-w3m-standalone ()
2743   "Wash the current buffer with w3m."
2744   (if (mm-w3m-standalone-supports-m17n-p)
2745       (progn
2746         (unless (mm-coding-system-p charset) ;; Bound by `article-wash-html'.
2747           ;; The default.
2748           (setq charset 'iso-8859-1))
2749         (let ((coding-system-for-write charset)
2750               (coding-system-for-read charset))
2751           (call-process-region
2752            (point-min) (point-max)
2753            "w3m" t t nil "-dump" "-T" "text/html"
2754            "-I" (symbol-name charset) "-O" (symbol-name charset))))
2755     (mm-inline-wash-with-stdin nil "w3m" "-dump" "-T" "text/html")))
2756
2757 (defvar gnus-article-browse-html-temp-list nil
2758   "List of temporary files created by `gnus-article-browse-html-parts'.
2759 Internal variable.")
2760
2761 (defcustom gnus-article-browse-delete-temp 'ask
2762   "What to do with temporary files from `gnus-article-browse-html-parts'.
2763 If nil, don't delete temporary files.  If it is t, delete them on
2764 exit from the summary buffer.  If it is the symbol `file', query
2765 on each file, if it is `ask' ask once when exiting from the
2766 summary buffer."
2767   :group 'gnus-article
2768   :version "23.1" ;; No Gnus
2769   :type '(choice (const :tag "Don't delete" nil)
2770                  (const :tag "Don't ask" t)
2771                  (const :tag "Ask" ask)
2772                  (const :tag "Ask for each file" file)))
2773
2774 ;; Cf. mm-postponed-undisplay-list / mm-destroy-postponed-undisplay-list.
2775
2776 (defun gnus-article-browse-delete-temp-files (&optional how)
2777   "Delete temp-files created by `gnus-article-browse-html-parts'."
2778   (when (and gnus-article-browse-html-temp-list
2779              (or how
2780                  (setq how gnus-article-browse-delete-temp)))
2781     (when (and (eq how 'ask)
2782                (gnus-y-or-n-p (format
2783                                "Delete all %s temporary HTML file(s)? "
2784                                (length gnus-article-browse-html-temp-list)))
2785                (setq how t)))
2786     (dolist (file gnus-article-browse-html-temp-list)
2787       (when (and (file-exists-p file)
2788                  (or (eq how t)
2789                      ;; `how' is neither `nil', `ask' nor `t' (i.e. `file'):
2790                      (gnus-y-or-n-p
2791                       (format "Delete temporary HTML file `%s'? " file))))
2792         (delete-file file)))
2793     ;; Also remove file from the list when not deleted or if file doesn't
2794     ;; exist anymore.
2795     (setq gnus-article-browse-html-temp-list nil))
2796   gnus-article-browse-html-temp-list)
2797
2798 (defun gnus-article-browse-html-parts (list &optional header)
2799   "View all \"text/html\" parts from LIST.
2800 Recurse into multiparts.  The optional HEADER that should be a decoded
2801 message header will be added to the bodies of the \"text/html\" parts."
2802   ;; Internal function used by `gnus-article-browse-html-article'.
2803   (let (type file charset tmp-file showed)
2804     ;; Find and show the html-parts.
2805     (dolist (handle list)
2806       ;; If HTML, show it:
2807       (cond ((not (listp handle)))
2808             ((or (equal (car (setq type (mm-handle-type handle))) "text/html")
2809                  (and (equal (car type) "message/external-body")
2810                       (or header
2811                           (setq file (or (mail-content-type-get type 'name)
2812                                          (mail-content-type-get
2813                                           (mm-handle-disposition handle)
2814                                           'filename))))
2815                       (or (mm-handle-cache handle)
2816                           (condition-case code
2817                               (progn (mm-extern-cache-contents handle) t)
2818                             (error
2819                              (gnus-message 3 "%s" (error-message-string code))
2820                              (when (>= gnus-verbose 3) (sit-for 2))
2821                              nil)))
2822                       (progn
2823                         (setq handle (mm-handle-cache handle)
2824                               type (mm-handle-type handle))
2825                         (equal (car type) "text/html"))))
2826              (when (or (setq charset (mail-content-type-get type 'charset))
2827                        header
2828                        (not file))
2829                (setq tmp-file (mm-make-temp-file
2830                                ;; Do we need to care for 8.3 filenames?
2831                                "mm-" nil ".html")))
2832              ;; Add a meta html tag to specify charset and a header.
2833              (cond
2834               (header
2835                (let (title eheader body hcharset coding)
2836                  (with-temp-buffer
2837                    (mm-enable-multibyte)
2838                    (setq case-fold-search t)
2839                    (insert header "\n")
2840                    (setq title (message-fetch-field "subject"))
2841                    (goto-char (point-min))
2842                    (while (re-search-forward "\\(<\\)\\|\\(>\\)\\|&" nil t)
2843                      (replace-match (cond ((match-beginning 1) "&lt;")
2844                                           ((match-beginning 2) "&gt;")
2845                                           (t "&amp;"))))
2846                    (goto-char (point-min))
2847                    (insert "<pre>\n")
2848                    (goto-char (point-max))
2849                    (insert "</pre>\n<hr>\n")
2850                    ;; We have to examine charset one by one since
2851                    ;; charset specified in parts might be different.
2852                    (if (eq charset 'gnus-decoded)
2853                        (setq charset 'utf-8
2854                              eheader (mm-encode-coding-string (buffer-string)
2855                                                               charset)
2856                              title (when title
2857                                      (mm-encode-coding-string title charset))
2858                              body (mm-encode-coding-string (mm-get-part handle)
2859                                                            charset))
2860                      (setq hcharset (mm-find-mime-charset-region (point-min)
2861                                                                  (point-max)))
2862                      (cond ((= (length hcharset) 1)
2863                             (setq hcharset (car hcharset)
2864                                   coding (mm-charset-to-coding-system
2865                                           hcharset)))
2866                            ((> (length hcharset) 1)
2867                             (setq hcharset 'utf-8
2868                                   coding hcharset)))
2869                      (if coding
2870                          (if charset
2871                              (progn
2872                                (setq body
2873                                      (mm-charset-to-coding-system charset))
2874                                (if (eq coding body)
2875                                    (setq eheader (mm-encode-coding-string
2876                                                   (buffer-string) coding)
2877                                          title (when title
2878                                                  (mm-encode-coding-string
2879                                                   title coding))
2880                                          body (mm-get-part handle))
2881                                  (setq charset 'utf-8
2882                                        eheader (mm-encode-coding-string
2883                                                 (buffer-string) charset)
2884                                        title (when title
2885                                                (mm-encode-coding-string
2886                                                 title charset))
2887                                        body (mm-encode-coding-string
2888                                              (mm-decode-coding-string
2889                                               (mm-get-part handle) body)
2890                                              charset))))
2891                            (setq charset hcharset
2892                                  eheader (mm-encode-coding-string
2893                                           (buffer-string) coding)
2894                                  title (when title
2895                                          (mm-encode-coding-string
2896                                           title coding))
2897                                  body (mm-get-part handle)))
2898                        (setq eheader (mm-string-as-unibyte (buffer-string))
2899                              body (mm-get-part handle))))
2900                    (erase-buffer)
2901                    (mm-disable-multibyte)
2902                    (insert body)
2903                    (when charset
2904                      (mm-add-meta-html-tag handle charset))
2905                    (when title
2906                      (goto-char (point-min))
2907                      (unless (search-forward "<title>" nil t)
2908                        (re-search-forward "<head>\\s-*" nil t)
2909                        (insert "<title>" title "</title>\n")))
2910                    (goto-char (point-min))
2911                    (or (re-search-forward
2912                         "<body\\(?:\\s-+[^>]+\\|\\s-*\\)>\\s-*" nil t)
2913                        (re-search-forward
2914                         "</head\\(?:\\s-+[^>]+\\|\\s-*\\)>\\s-*" nil t))
2915                    (insert eheader)
2916                    (mm-write-region (point-min) (point-max)
2917                                     tmp-file nil nil nil 'binary t))))
2918               (charset
2919                (mm-with-unibyte-buffer
2920                  (insert (if (eq charset 'gnus-decoded)
2921                              (mm-encode-coding-string
2922                               (mm-get-part handle)
2923                               (setq charset 'utf-8))
2924                            (mm-get-part handle)))
2925                  (if (or (mm-add-meta-html-tag handle charset)
2926                          (not file))
2927                      (mm-write-region (point-min) (point-max)
2928                                       tmp-file nil nil nil 'binary t)
2929                    (setq tmp-file nil))))
2930               (tmp-file
2931                (mm-save-part-to-file handle tmp-file)))
2932              (when tmp-file
2933                (add-to-list 'gnus-article-browse-html-temp-list tmp-file))
2934              (add-hook 'gnus-summary-prepare-exit-hook
2935                        'gnus-article-browse-delete-temp-files)
2936              (add-hook 'gnus-exit-gnus-hook
2937                        (lambda  ()
2938                          (gnus-article-browse-delete-temp-files t)))
2939              ;; FIXME: Warn if there's an <img> tag?
2940              (browse-url-of-file (or tmp-file (expand-file-name file)))
2941              (setq showed t))
2942             ;; If multipart, recurse
2943             ((equal (mm-handle-media-supertype handle) "multipart")
2944              (when (gnus-article-browse-html-parts handle header)
2945                (setq showed t)))
2946             ((equal (mm-handle-media-type handle) "message/rfc822")
2947              (mm-with-multibyte-buffer
2948                (mm-insert-part handle)
2949                (setq handle (mm-dissect-buffer t t))
2950                (when (and (bufferp (car handle))
2951                           (stringp (car (mm-handle-type handle))))
2952                  (setq handle (list handle)))
2953                (when header
2954                  (article-decode-encoded-words)
2955                  (let ((gnus-visible-headers
2956                         (or (get 'gnus-visible-headers 'standard-value)
2957                             gnus-visible-headers)))
2958                    (article-hide-headers))
2959                  (goto-char (point-min))
2960                  (search-forward "\n\n" nil 'move)
2961                  (skip-chars-backward "\t\n ")
2962                  (setq header (buffer-substring (point-min) (point)))))
2963              (when (prog1
2964                        (gnus-article-browse-html-parts handle header)
2965                      (mm-destroy-parts handle))
2966                (setq showed t)))))
2967     showed))
2968
2969 (defun gnus-article-browse-html-article (&optional arg)
2970   "View \"text/html\" parts of the current article with a WWW browser.
2971 The message header is added to the beginning of every html part unless
2972 the prefix argument ARG is given.
2973
2974 Warning: Spammers use links to images in HTML articles to verify
2975 whether you have read the message.  As
2976 `gnus-article-browse-html-article' passes the HTML content to the
2977 browser without eliminating these \"web bugs\" you should only
2978 use it for mails from trusted senders.
2979
2980 If you always want to display HTML parts in the browser, set
2981 `mm-text-html-renderer' to nil."
2982   ;; Cf. `mm-w3m-safe-url-regexp'
2983   (interactive "P")
2984   (if arg
2985       (gnus-summary-show-article)
2986     (let ((gnus-visible-headers (or (get 'gnus-visible-headers 'standard-value)
2987                                     gnus-visible-headers))
2988           ;; As we insert a <hr>, there's no need for the body boundary.
2989           (gnus-treat-body-boundary nil))
2990       (gnus-summary-show-article)))
2991   (with-current-buffer gnus-article-buffer
2992     (let ((header (unless arg
2993                     (save-restriction
2994                       (widen)
2995                       (buffer-substring-no-properties
2996                        (goto-char (point-min))
2997                        (if (search-forward "\n\n" nil t)
2998                            (match-beginning 0)
2999                          (goto-char (point-max))
3000                          (skip-chars-backward "\t\n ")
3001                          (point))))))
3002           parts)
3003       (set-buffer gnus-original-article-buffer)
3004       (setq parts (mm-dissect-buffer t t))
3005       ;; If singlepart, enforce a list.
3006       (when (and (bufferp (car parts))
3007                  (stringp (car (mm-handle-type parts))))
3008         (setq parts (list parts)))
3009       ;; Process the list
3010       (unless (gnus-article-browse-html-parts parts header)
3011         (gnus-error 3 "Mail doesn't contain a \"text/html\" part!"))
3012       (mm-destroy-parts parts)
3013       (unless arg
3014         (gnus-summary-show-article)))))
3015
3016 (defun article-hide-list-identifiers ()
3017   "Remove list identifies from the Subject header.
3018 The `gnus-list-identifiers' variable specifies what to do."
3019   (interactive)
3020   (let ((inhibit-point-motion-hooks t)
3021         (regexp (if (consp gnus-list-identifiers)
3022                     (mapconcat 'identity gnus-list-identifiers " *\\|")
3023                   gnus-list-identifiers))
3024         (inhibit-read-only t))
3025     (when regexp
3026       (save-excursion
3027         (save-restriction
3028           (article-narrow-to-head)
3029           (goto-char (point-min))
3030           (while (re-search-forward
3031                   (concat "^Subject: +\\(R[Ee]: +\\)*\\(" regexp " *\\)")
3032                   nil t)
3033             (delete-region (match-beginning 2) (match-end 0))
3034             (beginning-of-line))
3035           (when (re-search-forward
3036                  "^Subject: +\\(\\(R[Ee]: +\\)+\\)R[Ee]: +" nil t)
3037             (delete-region (match-beginning 1) (match-end 1))))))))
3038
3039 (defun article-hide-pem (&optional arg)
3040   "Toggle hiding of any PEM headers and signatures in the current article.
3041 If given a negative prefix, always show; if given a positive prefix,
3042 always hide."
3043   (interactive (gnus-article-hidden-arg))
3044   (unless (gnus-article-check-hidden-text 'pem arg)
3045     (save-excursion
3046       (let ((inhibit-read-only t) end)
3047         (goto-char (point-min))
3048         ;; Hide the horrendously ugly "header".
3049         (when (and (search-forward
3050                     "\n-----BEGIN PRIVACY-ENHANCED MESSAGE-----\n"
3051                     nil t)
3052                    (setq end (1+ (match-beginning 0))))
3053           (gnus-add-wash-type 'pem)
3054           (gnus-article-hide-text-type
3055            end
3056            (if (search-forward "\n\n" nil t)
3057                (match-end 0)
3058              (point-max))
3059            'pem)
3060           ;; Hide the trailer as well
3061           (when (search-forward "\n-----END PRIVACY-ENHANCED MESSAGE-----\n"
3062                                 nil t)
3063             (gnus-article-hide-text-type
3064              (match-beginning 0) (match-end 0) 'pem)))))))
3065
3066 (defun article-strip-banner ()
3067   "Strip the banners specified by the `banner' group parameter and by
3068 `gnus-article-address-banner-alist'."
3069   (interactive)
3070   (save-excursion
3071     (save-restriction
3072       (let ((inhibit-point-motion-hooks t))
3073         (when (gnus-parameter-banner gnus-newsgroup-name)
3074           (article-really-strip-banner
3075            (gnus-parameter-banner gnus-newsgroup-name)))
3076         (when gnus-article-address-banner-alist
3077           ;; Note that the From header is decoded here, so it is
3078           ;; required that the *-extract-address-components function
3079           ;; supports non-ASCII text.
3080           (let ((from (save-restriction
3081                         (widen)
3082                         (article-narrow-to-head)
3083                         (mail-fetch-field "from"))))
3084             (when (and from
3085                        (setq from
3086                              (cadr (funcall gnus-extract-address-components
3087                                             from))))
3088               (catch 'found
3089                 (dolist (pair gnus-article-address-banner-alist)
3090                   (when (string-match (car pair) from)
3091                     (throw 'found
3092                            (article-really-strip-banner (cdr pair)))))))))))))
3093
3094 (defun article-really-strip-banner (banner)
3095   "Strip the banner specified by the argument."
3096   (save-excursion
3097     (save-restriction
3098       (let ((inhibit-point-motion-hooks t)
3099             (gnus-signature-limit nil)
3100             (inhibit-read-only t))
3101         (article-goto-body)
3102         (cond
3103          ((eq banner 'signature)
3104           (when (gnus-article-narrow-to-signature)
3105             (widen)
3106             (forward-line -1)
3107             (delete-region (point) (point-max))))
3108          ((symbolp banner)
3109           (if (setq banner (cdr (assq banner gnus-article-banner-alist)))
3110               (while (re-search-forward banner nil t)
3111                 (delete-region (match-beginning 0) (match-end 0)))))
3112          ((stringp banner)
3113           (while (re-search-forward banner nil t)
3114             (delete-region (match-beginning 0) (match-end 0)))))))))
3115
3116 (defun article-babel ()
3117   "Translate article using an online translation service."
3118   (interactive)
3119   (require 'babel)
3120   (gnus-with-article-buffer
3121     (when (article-goto-body)
3122       (let* ((start (point))
3123              (end (point-max))
3124              (orig (buffer-substring start end))
3125              (trans (babel-as-string orig)))
3126         (save-restriction
3127           (narrow-to-region start end)
3128           (delete-region start end)
3129           (insert trans))))))
3130
3131 (defun article-hide-signature (&optional arg)
3132   "Hide the signature in the current article.
3133 If given a negative prefix, always show; if given a positive prefix,
3134 always hide."
3135   (interactive (gnus-article-hidden-arg))
3136   (unless (gnus-article-check-hidden-text 'signature arg)
3137     (save-excursion
3138       (save-restriction
3139         (let ((inhibit-read-only t))
3140           (when (gnus-article-narrow-to-signature)
3141             (gnus-article-hide-text-type
3142              (point-min) (point-max) 'signature))))))
3143   (gnus-set-mode-line 'article))
3144
3145 (defun article-strip-headers-in-body ()
3146   "Strip offensive headers from bodies."
3147   (interactive)
3148   (save-excursion
3149     (article-goto-body)
3150     (let ((case-fold-search t))
3151       (when (looking-at "x-no-archive:")
3152         (gnus-delete-line)))))
3153
3154 (defun article-strip-leading-blank-lines ()
3155   "Remove all blank lines from the beginning of the article."
3156   (interactive)
3157   (save-excursion
3158     (let ((inhibit-point-motion-hooks t)
3159           (inhibit-read-only t))
3160       (when (article-goto-body)
3161         (while (and (not (eobp))
3162                     (looking-at "[ \t]*$"))
3163           (gnus-delete-line))))))
3164
3165 (defun article-narrow-to-head ()
3166   "Narrow the buffer to the head of the message.
3167 Point is left at the beginning of the narrowed-to region."
3168   (narrow-to-region
3169    (goto-char (point-min))
3170    (if (search-forward "\n\n" nil 1)
3171        (1- (point))
3172      (point-max)))
3173   (goto-char (point-min)))
3174
3175 (defun article-goto-body ()
3176   "Place point at the start of the body."
3177   (goto-char (point-min))
3178   (cond
3179    ;; This variable is only bound when dealing with separate
3180    ;; MIME body parts.
3181    (article-goto-body-goes-to-point-min-p
3182     t)
3183    ((search-forward "\n\n" nil t)
3184     t)
3185    (t
3186     (goto-char (point-max))
3187     nil)))
3188
3189 (defun article-strip-multiple-blank-lines ()
3190   "Replace consecutive blank lines with one empty line."
3191   (interactive)
3192   (save-excursion
3193     (let ((inhibit-point-motion-hooks t)
3194           (inhibit-read-only t))
3195       ;; First make all blank lines empty.
3196       (article-goto-body)
3197       (while (re-search-forward "^[ \t]+$" nil t)
3198         (unless (gnus-annotation-in-region-p
3199                  (match-beginning 0) (match-end 0))
3200           (replace-match "" nil t)))
3201       ;; Then replace multiple empty lines with a single empty line.
3202       (article-goto-body)
3203       (while (re-search-forward "\n\n\\(\n+\\)" nil t)
3204         (unless (gnus-annotation-in-region-p
3205                  (match-beginning 0) (match-end 0))
3206           (delete-region (match-beginning 1) (match-end 1)))))))
3207
3208 (defun article-strip-leading-space ()
3209   "Remove all white space from the beginning of the lines in the article."
3210   (interactive)
3211   (save-excursion
3212     (let ((inhibit-point-motion-hooks t)
3213           (inhibit-read-only t))
3214       (article-goto-body)
3215       (while (re-search-forward "^[ \t]+" nil t)
3216         (replace-match "" t t)))))
3217
3218 (defun article-strip-trailing-space ()
3219   "Remove all white space from the end of the lines in the article."
3220   (interactive)
3221   (save-excursion
3222     (let ((inhibit-point-motion-hooks t)
3223           (inhibit-read-only t))
3224       (article-goto-body)
3225       (while (re-search-forward "[ \t]+$" nil t)
3226         (replace-match "" t t)))))
3227
3228 (defun article-strip-blank-lines ()
3229   "Strip leading, trailing and multiple blank lines."
3230   (interactive)
3231   (article-strip-leading-blank-lines)
3232   (article-remove-trailing-blank-lines)
3233   (article-strip-multiple-blank-lines))
3234
3235 (defun article-strip-all-blank-lines ()
3236   "Strip all blank lines."
3237   (interactive)
3238   (save-excursion
3239     (let ((inhibit-point-motion-hooks t)
3240           (inhibit-read-only t))
3241       (article-goto-body)
3242       (while (re-search-forward "^[ \t]*\n" nil t)
3243         (replace-match "" t t)))))
3244
3245 (defun gnus-article-narrow-to-signature ()
3246   "Narrow to the signature; return t if a signature is found, else nil."
3247   (let ((inhibit-point-motion-hooks t))
3248     (when (gnus-article-search-signature)
3249       (forward-line 1)
3250       ;; Check whether we have some limits to what we consider
3251       ;; to be a signature.
3252       (let ((limits (if (listp gnus-signature-limit) gnus-signature-limit
3253                       (list gnus-signature-limit)))
3254             limit limited)
3255         (while (setq limit (pop limits))
3256           (if (or (and (integerp limit)
3257                        (< (- (point-max) (point)) limit))
3258                   (and (floatp limit)
3259                        (< (count-lines (point) (point-max)) limit))
3260                   (and (functionp limit)
3261                        (funcall limit))
3262                   (and (stringp limit)
3263                        (not (re-search-forward limit nil t))))
3264               ()                        ; This limit did not succeed.
3265             (setq limited t
3266                   limits nil)))
3267         (unless limited
3268           (narrow-to-region (point) (point-max))
3269           t)))))
3270
3271 (defun gnus-article-search-signature ()
3272   "Search the current buffer for the signature separator.
3273 Put point at the beginning of the signature separator."
3274   (let ((cur (point)))
3275     (goto-char (point-max))
3276     (if (if (stringp gnus-signature-separator)
3277             (re-search-backward gnus-signature-separator nil t)
3278           (let ((seps gnus-signature-separator))
3279             (while (and seps
3280                         (not (re-search-backward (car seps) nil t)))
3281               (pop seps))
3282             seps))
3283         t
3284       (goto-char cur)
3285       nil)))
3286
3287 (defun gnus-article-hidden-arg ()
3288   "Return the current prefix arg as a number, or 0 if no prefix."
3289   (list (if current-prefix-arg
3290             (prefix-numeric-value current-prefix-arg)
3291           0)))
3292
3293 (defun gnus-article-check-hidden-text (type arg)
3294   "Return nil if hiding is necessary.
3295 Arg can be nil or a number.  nil and positive means hide, negative
3296 means show, 0 means toggle."
3297   (save-excursion
3298     (save-restriction
3299       (let ((hide (gnus-article-hidden-text-p type)))
3300         (cond
3301          ((or (null arg)
3302               (> arg 0))
3303           nil)
3304          ((< arg 0)
3305           (gnus-article-show-hidden-text type)
3306           t)
3307          (t
3308           (if (eq hide 'hidden)
3309               (progn
3310                 (gnus-article-show-hidden-text type)
3311                 t)
3312             nil)))))))
3313
3314 (defun gnus-article-hidden-text-p (type)
3315   "Say whether the current buffer contains hidden text of type TYPE."
3316   (let ((pos (text-property-any (point-min) (point-max) 'article-type type)))
3317     (while (and pos
3318                 (not (get-text-property pos 'invisible))
3319                 (not (get-text-property pos 'dummy-invisible)))
3320       (setq pos
3321             (text-property-any (1+ pos) (point-max) 'article-type type)))
3322     (if pos
3323         'hidden
3324       nil)))
3325
3326 (defun gnus-article-show-hidden-text (type &optional dummy)
3327   "Show all hidden text of type TYPE.
3328 Originally it is hide instead of DUMMY."
3329   (let ((inhibit-read-only t)
3330         (inhibit-point-motion-hooks t))
3331     (gnus-remove-text-properties-when
3332      'article-type type
3333      (point-min) (point-max)
3334      (cons 'article-type (cons type
3335                                gnus-hidden-properties)))
3336     (gnus-delete-wash-type type)))
3337
3338 (defconst article-time-units
3339   `((year . ,(* 365.25 24 60 60))
3340     (week . ,(* 7 24 60 60))
3341     (day . ,(* 24 60 60))
3342     (hour . ,(* 60 60))
3343     (minute . 60)
3344     (second . 1))
3345   "Mapping from time units to seconds.")
3346
3347 (defun gnus-article-forward-header ()
3348   "Move point to the start of the next header.
3349 If the current header is a continuation header, this can be several
3350 lines forward."
3351   (let ((ended nil))
3352     (while (not ended)
3353       (forward-line 1)
3354       (if (looking-at "[ \t]+[^ \t]")
3355           (forward-line 1)
3356         (setq ended t)))))
3357
3358 (defun article-date-ut (&optional type highlight)
3359   "Convert DATE date to universal time in the current article.
3360 If TYPE is `local', convert to local time; if it is `lapsed', output
3361 how much time has lapsed since DATE.  For `lapsed', the value of
3362 `gnus-article-date-lapsed-new-header' says whether the \"X-Sent:\" header
3363 should replace the \"Date:\" one, or should be added below it."
3364   (interactive (list 'ut t))
3365   (let* ((tdate-regexp "^Date:[ \t]\\|^X-Sent:[ \t]")
3366          (date-regexp (cond ((not gnus-article-date-lapsed-new-header)
3367                              tdate-regexp)
3368                             ((eq type 'lapsed)
3369                              "^X-Sent:[ \t]")
3370                             (article-lapsed-timer
3371                              "^Date:[ \t]")
3372                             (t
3373                              tdate-regexp)))
3374          (case-fold-search t)
3375          (inhibit-read-only t)
3376          (inhibit-point-motion-hooks t)
3377          pos date bface eface)
3378     (save-excursion
3379       (save-restriction
3380         (widen)
3381         (goto-char (point-min))
3382         (while (or (setq date (get-text-property (setq pos (point))
3383                                                  'original-date))
3384                    (when (setq pos (next-single-property-change
3385                                     (point) 'original-date))
3386                      (setq date (get-text-property pos 'original-date))
3387                      t))
3388           (narrow-to-region pos (or (text-property-any pos (point-max)
3389                                                        'original-date nil)
3390                                     (point-max)))
3391           (goto-char (point-min))
3392           (when (re-search-forward tdate-regexp nil t)
3393             (setq bface (get-text-property (point-at-bol) 'face)
3394                   eface (get-text-property (1- (point-at-eol)) 'face)))
3395           (goto-char (point-min))
3396           (setq pos nil)
3397           ;; Delete any old Date headers.
3398           (while (re-search-forward date-regexp nil t)
3399             (if pos
3400                 (delete-region (point-at-bol) (progn
3401                                                 (gnus-article-forward-header)
3402                                                 (point)))
3403               (delete-region (point-at-bol) (progn
3404                                               (gnus-article-forward-header)
3405                                               (forward-char -1)
3406                                               (point)))
3407               (setq pos (point))))
3408           (when (and (not pos)
3409                      (re-search-forward tdate-regexp nil t))
3410             (forward-line 1))
3411           (gnus-goto-char pos)
3412           (insert (article-make-date-line date (or type 'ut)))
3413           (unless pos
3414             (insert "\n")
3415             (forward-line -1))
3416           ;; Do highlighting.
3417           (beginning-of-line)
3418           (when (looking-at "\\([^:]+\\): *\\(.*\\)$")
3419             (put-text-property (match-beginning 1) (1+ (match-end 1))
3420                                'face bface)
3421             (put-text-property (match-beginning 2) (match-end 2)
3422                                'face eface))
3423           (put-text-property (point-min) (1- (point-max)) 'original-date date)
3424           (goto-char (point-max))
3425           (widen))))))
3426
3427 (defun article-make-date-line (date type)
3428   "Return a DATE line of TYPE."
3429   (unless (memq type '(local ut original user iso8601 lapsed english))
3430     (error "Unknown conversion type: %s" type))
3431   (condition-case ()
3432       (let ((time (date-to-time date)))
3433         (cond
3434          ;; Convert to the local timezone.
3435          ((eq type 'local)
3436           (concat "Date: " (message-make-date time)))
3437          ;; Convert to Universal Time.
3438          ((eq type 'ut)
3439           (concat "Date: "
3440                   (substring
3441                    (message-make-date
3442                     (let* ((e (parse-time-string date))
3443                            (tm (apply 'encode-time e))
3444                            (ms (car tm))
3445                            (ls (- (cadr tm) (car (current-time-zone time)))))
3446                       (cond ((< ls 0) (list (1- ms) (+ ls 65536)))
3447                             ((> ls 65535) (list (1+ ms) (- ls 65536)))
3448                             (t (list ms ls)))))
3449                    0 -5)
3450                   "UT"))
3451          ;; Get the original date from the article.
3452          ((eq type 'original)
3453           (concat "Date: " (if (string-match "\n+$" date)
3454                                (substring date 0 (match-beginning 0))
3455                              date)))
3456          ;; Let the user define the format.
3457          ((eq type 'user)
3458           (let ((format (or (condition-case nil
3459                                 (with-current-buffer gnus-summary-buffer
3460                                   gnus-article-time-format)
3461                               (error nil))
3462                             gnus-article-time-format)))
3463             (if (functionp format)
3464                 (funcall format time)
3465               (concat "Date: " (format-time-string format time)))))
3466          ;; ISO 8601.
3467          ((eq type 'iso8601)
3468           (let ((tz (car (current-time-zone time))))
3469             (concat
3470              "Date: "
3471              (format-time-string "%Y%m%dT%H%M%S" time)
3472              (format "%s%02d%02d"
3473                      (if (> tz 0) "+" "-") (/ (abs tz) 3600)
3474                      (/ (% (abs tz) 3600) 60)))))
3475          ;; Do an X-Sent lapsed format.
3476          ((eq type 'lapsed)
3477           ;; If the date is seriously mangled, the timezone functions are
3478           ;; liable to bug out, so we ignore all errors.
3479           (let* ((now (current-time))
3480                  (real-time (subtract-time now time))
3481                  (real-sec (and real-time
3482                                 (+ (* (float (car real-time)) 65536)
3483                                    (cadr real-time))))
3484                  (sec (and real-time (abs real-sec)))
3485                  num prev)
3486             (cond
3487              ((null real-time)
3488               "X-Sent: Unknown")
3489              ((zerop sec)
3490               "X-Sent: Now")
3491              (t
3492               (concat
3493                "X-Sent: "
3494                ;; This is a bit convoluted, but basically we go
3495                ;; through the time units for years, weeks, etc,
3496                ;; and divide things to see whether that results
3497                ;; in positive answers.
3498                (mapconcat
3499                 (lambda (unit)
3500                   (if (zerop (setq num (ffloor (/ sec (cdr unit)))))
3501                       ;; The (remaining) seconds are too few to
3502                       ;; be divided into this time unit.
3503                       ""
3504                     ;; It's big enough, so we output it.
3505                     (setq sec (- sec (* num (cdr unit))))
3506                     (prog1
3507                         (concat (if prev ", " "") (int-to-string
3508                                                    (floor num))
3509                                 " " (symbol-name (car unit))
3510                                 (if (> num 1) "s" ""))
3511                       (setq prev t))))
3512                 article-time-units "")
3513                ;; If dates are odd, then it might appear like the
3514                ;; article was sent in the future.
3515                (if (> real-sec 0)
3516                    " ago"
3517                  " in the future"))))))
3518          ;; Display the date in proper English
3519          ((eq type 'english)
3520           (let ((dtime (decode-time time)))
3521             (concat
3522              "Date: the "
3523              (number-to-string (nth 3 dtime))
3524              (let ((digit (% (nth 3 dtime) 10)))
3525                (cond
3526                 ((memq (nth 3 dtime) '(11 12 13)) "th")
3527                 ((= digit 1) "st")
3528                 ((= digit 2) "nd")
3529                 ((= digit 3) "rd")
3530                 (t "th")))
3531              " of "
3532              (nth (1- (nth 4 dtime)) gnus-english-month-names)
3533              " "
3534              (number-to-string (nth 5 dtime))
3535              " at "
3536              (format "%02d" (nth 2 dtime))
3537              ":"
3538              (format "%02d" (nth 1 dtime)))))))
3539     (error
3540      (format "Date: %s (from Gnus)" date))))
3541
3542 (defun article-date-local (&optional highlight)
3543   "Convert the current article date to the local timezone."
3544   (interactive (list t))
3545   (article-date-ut 'local highlight))
3546
3547 (defun article-date-english (&optional highlight)
3548   "Convert the current article date to something that is proper English."
3549   (interactive (list t))
3550   (article-date-ut 'english highlight))
3551
3552 (defun article-date-original (&optional highlight)
3553   "Convert the current article date to what it was originally.
3554 This is only useful if you have used some other date conversion
3555 function and want to see what the date was before converting."
3556   (interactive (list t))
3557   (article-date-ut 'original highlight))
3558
3559 (defun article-date-lapsed (&optional highlight)
3560   "Convert the current article date to time lapsed since it was sent."
3561   (interactive (list t))
3562   (article-date-ut 'lapsed highlight))
3563
3564 (defun article-update-date-lapsed ()
3565   "Function to be run from a timer to update the lapsed time line."
3566   (save-match-data
3567     (let (deactivate-mark)
3568       (save-excursion
3569         (ignore-errors
3570          (walk-windows
3571           (lambda (w)
3572             (set-buffer (window-buffer w))
3573             (when (eq major-mode 'gnus-article-mode)
3574               (let ((mark (point-marker)))
3575                 (goto-char (point-min))
3576                 (when (re-search-forward "^X-Sent:" nil t)
3577                   (article-date-lapsed t))
3578                 (goto-char (marker-position mark))
3579                 (move-marker mark nil))))
3580           nil 'visible))))))
3581
3582 (defun gnus-start-date-timer (&optional n)
3583   "Start a timer to update the X-Sent header in the article buffers.
3584 The numerical prefix says how frequently (in seconds) the function
3585 is to run."
3586   (interactive "p")
3587   (unless n
3588     (setq n 1))
3589   (gnus-stop-date-timer)
3590   (setq article-lapsed-timer
3591         (run-at-time 1 n 'article-update-date-lapsed)))
3592
3593 (defun gnus-stop-date-timer ()
3594   "Stop the X-Sent timer."
3595   (interactive)
3596   (when article-lapsed-timer
3597     (nnheader-cancel-timer article-lapsed-timer)
3598     (setq article-lapsed-timer nil)))
3599
3600 (defun article-date-user (&optional highlight)
3601   "Convert the current article date to the user-defined format.
3602 This format is defined by the `gnus-article-time-format' variable."
3603   (interactive (list t))
3604   (article-date-ut 'user highlight))
3605
3606 (defun article-date-iso8601 (&optional highlight)
3607   "Convert the current article date to ISO8601."
3608   (interactive (list t))
3609   (article-date-ut 'iso8601 highlight))
3610
3611 (defmacro gnus-article-save-original-date (&rest forms)
3612   "Save the original date as a text property and evaluate FORMS."
3613   `(let* ((case-fold-search t)
3614           (start (progn
3615                    (goto-char (point-min))
3616                    (when (and (re-search-forward "^date:[\t\n ]+" nil t)
3617                               (not (bolp)))
3618                      (match-end 0))))
3619           (date (when (and start
3620                            (re-search-forward "[\t ]*\n\\(?:[^\t ]\\|\\'\\)"
3621                                               nil t))
3622                   (buffer-substring-no-properties start
3623                                                   (match-beginning 0)))))
3624      (goto-char (point-max))
3625      (skip-chars-backward "\n")
3626      (put-text-property (point-min) (point) 'original-date date)
3627      ,@forms
3628      (goto-char (point-max))
3629      (skip-chars-backward "\n")
3630      (put-text-property (point-min) (point) 'original-date date)))
3631
3632 ;; (defun article-show-all ()
3633 ;;   "Show all hidden text in the article buffer."
3634 ;;   (interactive)
3635 ;;   (save-excursion
3636 ;;     (let ((inhibit-read-only t))
3637 ;;       (gnus-article-unhide-text (point-min) (point-max)))))
3638
3639 (defun article-remove-leading-whitespace ()
3640   "Remove excessive whitespace from all headers."
3641   (interactive)
3642   (save-excursion
3643     (save-restriction
3644       (let ((inhibit-read-only t))
3645         (article-narrow-to-head)
3646         (goto-char (point-min))
3647         (while (re-search-forward "^[^ :]+: \\([ \t]+\\)" nil t)
3648           (delete-region (match-beginning 1) (match-end 1)))))))
3649
3650 (defun article-emphasize (&optional arg)
3651   "Emphasize text according to `gnus-emphasis-alist'."
3652   (interactive (gnus-article-hidden-arg))
3653   (unless (gnus-article-check-hidden-text 'emphasis arg)
3654     (save-excursion
3655       (let ((alist (or
3656                     (condition-case nil
3657                         (with-current-buffer gnus-summary-buffer
3658                           gnus-article-emphasis-alist)
3659                       (error))
3660                     gnus-emphasis-alist))
3661             (inhibit-read-only t)
3662             (props (append '(article-type emphasis)
3663                            gnus-hidden-properties))
3664             regexp elem beg invisible visible face)
3665         (article-goto-body)
3666         (setq beg (point))
3667         (while (setq elem (pop alist))
3668           (goto-char beg)
3669           (setq regexp (car elem)
3670                 invisible (nth 1 elem)
3671                 visible (nth 2 elem)
3672                 face (nth 3 elem))
3673           (while (re-search-forward regexp nil t)
3674             (when (and (match-beginning visible) (match-beginning invisible))
3675               (gnus-article-hide-text
3676                (match-beginning invisible) (match-end invisible) props)
3677               (gnus-article-unhide-text-type
3678                (match-beginning visible) (match-end visible) 'emphasis)
3679               (gnus-put-overlay-excluding-newlines
3680                (match-beginning visible) (match-end visible) 'face face)
3681               (gnus-add-wash-type 'emphasis)
3682               (goto-char (match-end invisible)))))))))
3683
3684 (defun gnus-article-setup-highlight-words (&optional highlight-words)
3685   "Setup newsgroup emphasis alist."
3686   (unless gnus-article-emphasis-alist
3687     (let ((name (and gnus-newsgroup-name
3688                      (gnus-group-real-name gnus-newsgroup-name))))
3689       (make-local-variable 'gnus-article-emphasis-alist)
3690       (setq gnus-article-emphasis-alist
3691             (nconc
3692              (let ((alist gnus-group-highlight-words-alist) elem highlight)
3693                (while (setq elem (pop alist))
3694                  (when (and name (string-match (car elem) name))
3695                    (setq alist nil
3696                          highlight (copy-sequence (cdr elem)))))
3697                highlight)
3698              (copy-sequence highlight-words)
3699              (if gnus-newsgroup-name
3700                  (copy-sequence (gnus-group-find-parameter
3701                                  gnus-newsgroup-name 'highlight-words t)))
3702              gnus-emphasis-alist)))))
3703
3704 (defvar gnus-summary-article-menu)
3705 (defvar gnus-summary-post-menu)
3706
3707 ;;; Saving functions.
3708
3709 (defun gnus-article-save (save-buffer file &optional num)
3710   "Save the currently selected article."
3711   (when (or (get gnus-default-article-saver :headers)
3712             (not gnus-save-all-headers))
3713     ;; Remove headers according to `gnus-saved-headers' or the value
3714     ;; of the `:headers' property that the saver function might have.
3715     (let ((gnus-visible-headers
3716            (or (symbol-value (get gnus-default-article-saver :headers))
3717                gnus-saved-headers gnus-visible-headers))
3718           ;; Ignore group parameter.  See `article-hide-headers'.
3719           (gnus-summary-buffer nil))
3720       (with-current-buffer save-buffer
3721         (article-hide-headers 1 t))))
3722   (save-window-excursion
3723     (if (not gnus-default-article-saver)
3724         (error "No default saver is defined")
3725       ;; !!! Magic!  The saving functions all save
3726       ;; `gnus-save-article-buffer' (or so they think), but we
3727       ;; bind that variable to our save-buffer.
3728       (set-buffer gnus-article-buffer)
3729       (let* ((gnus-save-article-buffer save-buffer)
3730              (filename
3731               (cond
3732                ((not gnus-prompt-before-saving) 'default)
3733                ((eq gnus-prompt-before-saving 'always) nil)
3734                (t file)))
3735              (gnus-number-of-articles-to-be-saved
3736               (when (eq gnus-prompt-before-saving t)
3737                 num)))                  ; Magic
3738         (set-buffer gnus-article-current-summary)
3739         (funcall gnus-default-article-saver filename)))))
3740
3741 (defun gnus-read-save-file-name (prompt &optional filename
3742                                         function group headers variable
3743                                         dir-var)
3744   (let ((default-name
3745           (funcall function group headers (symbol-value variable)))
3746         result)
3747     (setq result
3748           (expand-file-name
3749            (cond
3750             ((eq filename 'default)
3751              default-name)
3752             ((eq filename t)
3753              default-name)
3754             (filename filename)
3755             (t
3756              (when (symbol-value dir-var)
3757                (setq default-name (expand-file-name
3758                                    (file-name-nondirectory default-name)
3759                                    (symbol-value dir-var))))
3760              (let* ((split-name (gnus-get-split-value gnus-split-methods))
3761                     (prompt
3762                      (format prompt
3763                              (if (and gnus-number-of-articles-to-be-saved
3764                                       (> gnus-number-of-articles-to-be-saved 1))
3765                                  (format "these %d articles"
3766                                          gnus-number-of-articles-to-be-saved)
3767                                "this article")))
3768                     (file
3769                      ;; Let the split methods have their say.
3770                      (cond
3771                       ;; No split name was found.
3772                       ((null split-name)
3773                        (read-file-name
3774                         (concat prompt " (default "
3775                                 (file-name-nondirectory default-name) "): ")
3776                         (file-name-directory default-name)
3777                         default-name))
3778                       ;; A single group name is returned.
3779                       ((stringp split-name)
3780                        (setq default-name
3781                              (funcall function split-name headers
3782                                       (symbol-value variable)))
3783                        (read-file-name
3784                         (concat prompt " (default "
3785                                 (file-name-nondirectory default-name) "): ")
3786                         (file-name-directory default-name)
3787                         default-name))
3788                       ;; A single split name was found
3789                       ((= 1 (length split-name))
3790                        (let* ((name (expand-file-name
3791                                      (car split-name)
3792                                      gnus-article-save-directory))
3793                               (dir (cond ((file-directory-p name)
3794                                           (file-name-as-directory name))
3795                                          ((file-exists-p name) name)
3796                                          (t gnus-article-save-directory))))
3797                          (read-file-name
3798                           (concat prompt " (default " name "): ")
3799                           dir name)))
3800                       ;; A list of splits was found.
3801                       (t
3802                        (setq split-name (nreverse split-name))
3803                        (let (result)
3804                          (let ((file-name-history
3805                                 (nconc split-name file-name-history)))
3806                            (setq result
3807                                  (expand-file-name
3808                                   (read-file-name
3809                                    (concat prompt " (`M-p' for defaults): ")
3810                                    gnus-article-save-directory
3811                                    (car split-name))
3812                                   gnus-article-save-directory)))
3813                          (car (push result file-name-history)))))))
3814                ;; Create the directory.
3815                (gnus-make-directory (file-name-directory file))
3816                ;; If we have read a directory, we append the default file name.
3817                (when (file-directory-p file)
3818                  (setq file (expand-file-name (file-name-nondirectory
3819                                                default-name)
3820                                               (file-name-as-directory file))))
3821                ;; Possibly translate some characters.
3822                (nnheader-translate-file-chars file))))))
3823     (gnus-make-directory (file-name-directory result))
3824     (when variable
3825       (set variable result))
3826     (when dir-var
3827       (set dir-var (file-name-directory result)))
3828     result))
3829
3830 (defun gnus-article-archive-name (group)
3831   "Return the first instance of an \"Archive-name\" in the current buffer."
3832   (let ((case-fold-search t))
3833     (when (re-search-forward "archive-name: *\\([^ \n\t]+\\)[ \t]*$" nil t)
3834       (nnheader-concat gnus-article-save-directory
3835                        (match-string 1)))))
3836
3837 (defun gnus-article-nndoc-name (group)
3838   "If GROUP is an nndoc group, return the name of the parent group."
3839   (when (eq (car (gnus-find-method-for-group group)) 'nndoc)
3840     (gnus-group-get-parameter group 'save-article-group)))
3841
3842 (defun gnus-summary-save-in-rmail (&optional filename)
3843   "Append this article to Rmail file.
3844 Optional argument FILENAME specifies file name.
3845 Directory to save to is default to `gnus-article-save-directory'."
3846   (setq filename (gnus-read-save-file-name
3847                   "Save %s in rmail file" filename
3848                   gnus-rmail-save-name gnus-newsgroup-name
3849                   gnus-current-headers 'gnus-newsgroup-last-rmail))
3850   (gnus-eval-in-buffer-window gnus-save-article-buffer
3851     (save-excursion
3852       (save-restriction
3853         (widen)
3854         (gnus-output-to-rmail filename))))
3855   filename)
3856
3857 (defun gnus-summary-save-in-mail (&optional filename)
3858   "Append this article to Unix mail file.
3859 Optional argument FILENAME specifies file name.
3860 Directory to save to is default to `gnus-article-save-directory'."
3861   (setq filename (gnus-read-save-file-name
3862                   "Save %s in Unix mail file" filename
3863                   gnus-mail-save-name gnus-newsgroup-name
3864                   gnus-current-headers 'gnus-newsgroup-last-mail))
3865   (gnus-eval-in-buffer-window gnus-save-article-buffer
3866     (save-excursion
3867       (save-restriction
3868         (widen)
3869         (if (and (file-readable-p filename)
3870                  (file-regular-p filename)
3871                  (mail-file-babyl-p filename))
3872             (rmail-output-to-rmail-file filename t)
3873           (gnus-output-to-mail filename)))))
3874   filename)
3875
3876 (put 'gnus-summary-save-in-file :decode t)
3877 (put 'gnus-summary-save-in-file :headers 'gnus-saved-headers)
3878 (defun gnus-summary-save-in-file (&optional filename overwrite)
3879   "Append this article to file.
3880 Optional argument FILENAME specifies file name.
3881 Directory to save to is default to `gnus-article-save-directory'."
3882   (setq filename (gnus-read-save-file-name
3883                   "Save %s in file" filename
3884                   gnus-file-save-name gnus-newsgroup-name
3885                   gnus-current-headers 'gnus-newsgroup-last-file))
3886   (gnus-eval-in-buffer-window gnus-save-article-buffer
3887     (save-excursion
3888       (save-restriction
3889         (widen)
3890         (when (and overwrite
3891                    (file-exists-p filename))
3892           (delete-file filename))
3893         (gnus-output-to-file filename))))
3894   filename)
3895
3896 (put 'gnus-summary-write-to-file :decode t)
3897 (put 'gnus-summary-write-to-file :function 'gnus-summary-save-in-file)
3898 (put 'gnus-summary-write-to-file :headers 'gnus-saved-headers)
3899 (defun gnus-summary-write-to-file (&optional filename)
3900   "Write this article to a file, overwriting it if the file exists.
3901 Optional argument FILENAME specifies file name.
3902 The directory to save in defaults to `gnus-article-save-directory'."
3903   (setq filename (gnus-read-save-file-name
3904                   "Save %s in file" filename
3905                   gnus-file-save-name gnus-newsgroup-name
3906                   gnus-current-headers nil 'gnus-newsgroup-last-directory))
3907   (gnus-summary-save-in-file filename t))
3908
3909 (put 'gnus-summary-save-body-in-file :decode t)
3910 (defun gnus-summary-save-body-in-file (&optional filename overwrite)
3911   "Append this article body to a file.
3912 Optional argument FILENAME specifies file name.
3913 The directory to save in defaults to `gnus-article-save-directory'."
3914   (setq filename (gnus-read-save-file-name
3915                   "Save %s body in file" filename
3916                   gnus-file-save-name gnus-newsgroup-name
3917                   gnus-current-headers 'gnus-newsgroup-last-file))
3918   (gnus-eval-in-buffer-window gnus-save-article-buffer
3919     (save-excursion
3920       (save-restriction
3921         (widen)
3922         (when (article-goto-body)
3923           (narrow-to-region (point) (point-max)))
3924         (when (and overwrite
3925                    (file-exists-p filename))
3926           (delete-file filename))
3927         (gnus-output-to-file filename))))
3928   filename)
3929
3930 (put 'gnus-summary-write-body-to-file :decode t)
3931 (put 'gnus-summary-write-body-to-file
3932      :function 'gnus-summary-save-body-in-file)
3933 (defun gnus-summary-write-body-to-file (&optional filename)
3934   "Write this article body to a file, overwriting it if the file exists.
3935 Optional argument FILENAME specifies file name.
3936 The directory to save in defaults to `gnus-article-save-directory'."
3937   (setq filename (gnus-read-save-file-name
3938                   "Save %s body in file" filename
3939                   gnus-file-save-name gnus-newsgroup-name
3940                   gnus-current-headers nil 'gnus-newsgroup-last-directory))
3941   (gnus-summary-save-body-in-file filename t))
3942
3943 (put 'gnus-summary-save-in-pipe :decode t)
3944 (put 'gnus-summary-save-in-pipe :headers 'gnus-saved-headers)
3945 (defun gnus-summary-save-in-pipe (&optional command raw)
3946   "Pipe this article to subprocess COMMAND.
3947 Valid values for COMMAND include:
3948   a string
3949     The executable command name and possibly arguments.
3950   nil
3951     You will be prompted for the command in the minibuffer.
3952   the symbol `default'
3953     It will be replaced with the command which the variable
3954     `gnus-summary-pipe-output-default-command' holds or the command
3955     last used for saving.
3956 Non-nil value for RAW overrides `:decode' and `:headers' properties
3957 and the raw article including all headers will be piped."
3958   (let ((article (gnus-summary-article-number))
3959         (decode (unless raw
3960                   (get 'gnus-summary-save-in-pipe :decode)))
3961         save-buffer default)
3962     (if article
3963         (if (vectorp (gnus-summary-article-header article))
3964             (save-current-buffer
3965               (gnus-summary-select-article decode decode nil article)
3966               (insert-buffer-substring
3967                (prog1
3968                    (if decode
3969                        gnus-article-buffer
3970                      gnus-original-article-buffer)
3971                  (setq save-buffer
3972                        (nnheader-set-temp-buffer " *Gnus Save*"))))
3973               ;; Remove unwanted headers.
3974               (when (and (not raw)
3975                          (or (get 'gnus-summary-save-in-pipe :headers)
3976                              (not gnus-save-all-headers)))
3977                 (let ((gnus-visible-headers
3978                        (or (symbol-value (get 'gnus-summary-save-in-pipe
3979                                               :headers))
3980                            gnus-saved-headers gnus-visible-headers))
3981                       (gnus-summary-buffer nil))
3982                   (article-hide-headers 1 t))))
3983           (error "%d is not a real article" article))
3984       (error "No article to pipe"))
3985     (setq default (or gnus-summary-pipe-output-default-command
3986                       gnus-last-shell-command))
3987     (unless (stringp command)
3988       (setq command
3989             (if (and (eq command 'default) default)
3990                 default
3991               (gnus-read-shell-command "Shell command on this article: "
3992                                        default))))
3993     (when (string-equal command "")
3994       (if default
3995           (setq command default)
3996         (error "A command is required")))
3997     (gnus-eval-in-buffer-window save-buffer
3998       (save-restriction
3999         (widen)
4000         (shell-command-on-region (point-min) (point-max) command nil)))
4001     (gnus-kill-buffer save-buffer))
4002   (setq gnus-summary-pipe-output-default-command command))
4003
4004 (defun gnus-summary-pipe-to-muttprint (&optional command)
4005   "Pipe this article to muttprint."
4006   (unless (stringp command)
4007     (setq command (read-string
4008                    "Print using command: " gnus-summary-muttprint-program
4009                    nil gnus-summary-muttprint-program)))
4010   (let ((gnus-summary-pipe-output-default-command
4011          gnus-summary-pipe-output-default-command))
4012     (gnus-summary-save-in-pipe command))
4013   (setq gnus-summary-muttprint-program command))
4014
4015 ;;; Article file names when saving.
4016
4017 (defun gnus-capitalize-newsgroup (newsgroup)
4018   "Capitalize NEWSGROUP name."
4019   (when (not (zerop (length newsgroup)))
4020     (concat (char-to-string (upcase (aref newsgroup 0)))
4021             (substring newsgroup 1))))
4022
4023 (defun gnus-Numeric-save-name (newsgroup headers &optional last-file)
4024   "Generate file name from NEWSGROUP, HEADERS, and optional LAST-FILE.
4025 If variable `gnus-use-long-file-name' is non-nil, it is ~/News/News.group/num.
4026 Otherwise, it is like ~/News/news/group/num."
4027   (let ((default
4028           (expand-file-name
4029            (concat (if (gnus-use-long-file-name 'not-save)
4030                        (gnus-capitalize-newsgroup newsgroup)
4031                      (gnus-newsgroup-directory-form newsgroup))
4032                    "/" (int-to-string (mail-header-number headers)))
4033            gnus-article-save-directory)))
4034     (if (and last-file
4035              (string-equal (file-name-directory default)
4036                            (file-name-directory last-file))
4037              (string-match "^[0-9]+$" (file-name-nondirectory last-file)))
4038         default
4039       (or last-file default))))
4040
4041 (defun gnus-numeric-save-name (newsgroup headers &optional last-file)
4042   "Generate file name from NEWSGROUP, HEADERS, and optional LAST-FILE.
4043 If variable `gnus-use-long-file-name' is non-nil, it is
4044 ~/News/news.group/num.  Otherwise, it is like ~/News/news/group/num."
4045   (let ((default
4046           (expand-file-name
4047            (concat (if (gnus-use-long-file-name 'not-save)
4048                        newsgroup
4049                      (gnus-newsgroup-directory-form newsgroup))
4050                    "/" (int-to-string (mail-header-number headers)))
4051            gnus-article-save-directory)))
4052     (if (and last-file
4053              (string-equal (file-name-directory default)
4054                            (file-name-directory last-file))
4055              (string-match "^[0-9]+$" (file-name-nondirectory last-file)))
4056         default
4057       (or last-file default))))
4058
4059 (defun gnus-plain-save-name (newsgroup headers &optional last-file)
4060   "Generate file name from NEWSGROUP, HEADERS, and optional LAST-FILE.
4061 If variable `gnus-use-long-file-name' is non-nil, it is
4062 ~/News/news.group.  Otherwise, it is like ~/News/news/group/news."
4063   (or last-file
4064       (expand-file-name
4065        (if (gnus-use-long-file-name 'not-save)
4066            newsgroup
4067          (file-relative-name
4068           (expand-file-name "news" (gnus-newsgroup-directory-form newsgroup))
4069           default-directory))
4070        gnus-article-save-directory)))
4071
4072 (defun gnus-sender-save-name (newsgroup headers &optional last-file)
4073   "Generate file name from sender."
4074   (let ((from (mail-header-from headers)))
4075     (expand-file-name
4076      (if (and from (string-match "\\([^ <]+\\)@" from))
4077          (match-string 1 from)
4078        "nobody")
4079      gnus-article-save-directory)))
4080
4081 (defun article-verify-x-pgp-sig ()
4082   "Verify X-PGP-Sig."
4083   ;; <ftp://ftp.isc.org/pub/pgpcontrol/FORMAT>
4084   (interactive)
4085   (if (gnus-buffer-live-p gnus-original-article-buffer)
4086       (let ((sig (with-current-buffer gnus-original-article-buffer
4087                    (gnus-fetch-field "X-PGP-Sig")))
4088             items info headers)
4089         (when (and sig
4090                    mml2015-use
4091                    (mml2015-clear-verify-function))
4092           (with-temp-buffer
4093             (insert-buffer-substring gnus-original-article-buffer)
4094             (setq items (split-string sig))
4095             (message-narrow-to-head)
4096             (let ((inhibit-point-motion-hooks t)
4097                   (case-fold-search t))
4098               ;; Don't verify multiple headers.
4099               (setq headers (mapconcat (lambda (header)
4100                                          (concat header ": "
4101                                                  (mail-fetch-field header)
4102                                                  "\n"))
4103                                        (split-string (nth 1 items) ",") "")))
4104             (delete-region (point-min) (point-max))
4105             (insert "-----BEGIN PGP SIGNED MESSAGE-----\n\n")
4106             (insert "X-Signed-Headers: " (nth 1 items) "\n")
4107             (insert headers)
4108             (widen)
4109             (forward-line)
4110             (while (not (eobp))
4111               (if (looking-at "^-")
4112                   (insert "- "))
4113               (forward-line))
4114             (insert "\n-----BEGIN PGP SIGNATURE-----\n")
4115             (insert "Version: " (car items) "\n\n")
4116             (insert (mapconcat 'identity (cddr items) "\n"))
4117             (insert "\n-----END PGP SIGNATURE-----\n")
4118             (let ((mm-security-handle (list (format "multipart/signed"))))
4119               (mml2015-clean-buffer)
4120               (let ((coding-system-for-write (or gnus-newsgroup-charset
4121                                                  'iso-8859-1)))
4122                 (funcall (mml2015-clear-verify-function)))
4123               (setq info
4124                     (or (mm-handle-multipart-ctl-parameter
4125                          mm-security-handle 'gnus-details)
4126                         (mm-handle-multipart-ctl-parameter
4127                          mm-security-handle 'gnus-info)))))
4128           (when info
4129             (let ((inhibit-read-only t) bface eface)
4130               (save-restriction
4131                 (message-narrow-to-head)
4132                 (goto-char (point-max))
4133                 (forward-line -1)
4134                 (setq bface (get-text-property (point-at-bol) 'face)
4135                       eface (get-text-property (1- (point-at-eol)) 'face))
4136                 (message-remove-header "X-Gnus-PGP-Verify")
4137                 (if (re-search-forward "^X-PGP-Sig:" nil t)
4138                     (forward-line)
4139                   (goto-char (point-max)))
4140                 (narrow-to-region (point) (point))
4141                 (insert "X-Gnus-PGP-Verify: " info "\n")
4142                 (goto-char (point-min))
4143                 (forward-line)
4144                 (while (not (eobp))
4145                   (if (not (looking-at "^[ \t]"))
4146                       (insert " "))
4147                   (forward-line))
4148                 ;; Do highlighting.
4149                 (goto-char (point-min))
4150                 (when (looking-at "\\([^:]+\\): *")
4151                   (put-text-property (match-beginning 1) (1+ (match-end 1))
4152                                      'face bface)
4153                   (put-text-property (match-end 0) (point-max)
4154                                      'face eface)))))))))
4155
4156 (defun article-verify-cancel-lock ()
4157   "Verify Cancel-Lock header."
4158   (interactive)
4159   (if (gnus-buffer-live-p gnus-original-article-buffer)
4160       (canlock-verify gnus-original-article-buffer)))
4161
4162 (eval-and-compile
4163   (mapc
4164    (lambda (func)
4165      (let (afunc gfunc)
4166        (if (consp func)
4167            (setq afunc (car func)
4168                  gfunc (cdr func))
4169          (setq afunc func
4170                gfunc (intern (format "gnus-%s" func))))
4171        (defalias gfunc
4172          (when (fboundp afunc)
4173            `(lambda (&optional interactive &rest args)
4174               ,(documentation afunc t)
4175               (interactive (list t))
4176               (with-current-buffer gnus-article-buffer
4177                 (if interactive
4178                     (call-interactively ',afunc)
4179                   (apply ',afunc args))))))))
4180    '(article-hide-headers
4181      article-verify-x-pgp-sig
4182      article-verify-cancel-lock
4183      article-hide-boring-headers
4184      article-treat-overstrike
4185      article-treat-ansi-sequences
4186      article-fill-long-lines
4187      article-capitalize-sentences
4188      article-remove-cr
4189      article-remove-leading-whitespace
4190      article-display-x-face
4191      article-display-face
4192      article-de-quoted-unreadable
4193      article-de-base64-unreadable
4194      article-decode-HZ
4195      article-wash-html
4196      article-unsplit-urls
4197      article-hide-list-identifiers
4198      article-strip-banner
4199      article-babel
4200      article-hide-pem
4201      article-hide-signature
4202      article-strip-headers-in-body
4203      article-remove-trailing-blank-lines
4204      article-strip-leading-blank-lines
4205      article-strip-multiple-blank-lines
4206      article-strip-leading-space
4207      article-strip-trailing-space
4208      article-strip-blank-lines
4209      article-strip-all-blank-lines
4210      article-date-local
4211      article-date-english
4212      article-date-iso8601
4213      article-date-original
4214      article-date-ut
4215      article-decode-mime-words
4216      article-decode-charset
4217      article-decode-encoded-words
4218      article-date-user
4219      article-date-lapsed
4220      article-emphasize
4221      article-treat-dumbquotes
4222      article-normalize-headers
4223      ;;(article-show-all . gnus-article-show-all-headers)
4224      )))
4225 \f
4226 ;;;
4227 ;;; Gnus article mode
4228 ;;;
4229
4230 (put 'gnus-article-mode 'mode-class 'special)
4231
4232 (set-keymap-parent gnus-article-mode-map widget-keymap)
4233
4234 (gnus-define-keys gnus-article-mode-map
4235   " " gnus-article-goto-next-page
4236   "\177" gnus-article-goto-prev-page
4237   [delete] gnus-article-goto-prev-page
4238   [backspace] gnus-article-goto-prev-page
4239   "\C-c^" gnus-article-refer-article
4240   "h" gnus-article-show-summary
4241   "s" gnus-article-show-summary
4242   "\C-c\C-m" gnus-article-mail
4243   "?" gnus-article-describe-briefly
4244   "e" gnus-summary-edit-article
4245   "<" beginning-of-buffer
4246   ">" end-of-buffer
4247   "\C-c\C-i" gnus-info-find-node
4248   "\C-c\C-b" gnus-bug
4249   "R" gnus-article-reply-with-original
4250   "F" gnus-article-followup-with-original
4251   "\C-hk" gnus-article-describe-key
4252   "\C-hc" gnus-article-describe-key-briefly
4253   "\C-hb" gnus-article-describe-bindings
4254
4255   "\C-d" gnus-article-read-summary-keys
4256   "\M-*" gnus-article-read-summary-keys
4257   "\M-#" gnus-article-read-summary-keys
4258   "\M-^" gnus-article-read-summary-keys
4259   "\M-g" gnus-article-read-summary-keys)
4260
4261 (substitute-key-definition
4262  'undefined 'gnus-article-read-summary-keys gnus-article-mode-map)
4263
4264 (gnus-define-keys (gnus-article-send-map "S" gnus-article-mode-map)
4265   "W" gnus-article-wide-reply-with-original)
4266 (if (featurep 'xemacs)
4267     (set-keymap-default-binding gnus-article-send-map
4268                                 'gnus-article-read-summary-send-keys)
4269   (define-key gnus-article-send-map [t] 'gnus-article-read-summary-send-keys))
4270
4271 (defun gnus-article-make-menu-bar ()
4272   (unless (boundp 'gnus-article-commands-menu)
4273     (gnus-summary-make-menu-bar))
4274   (gnus-turn-off-edit-menu 'article)
4275   (unless (boundp 'gnus-article-article-menu)
4276     (easy-menu-define
4277      gnus-article-article-menu gnus-article-mode-map ""
4278      '("Article"
4279        ["Scroll forwards" gnus-article-goto-next-page t]
4280        ["Scroll backwards" gnus-article-goto-prev-page t]
4281        ["Show summary" gnus-article-show-summary t]
4282        ["Fetch Message-ID at point" gnus-article-refer-article t]
4283        ["Mail to address at point" gnus-article-mail t]
4284        ["Send a bug report" gnus-bug t]))
4285
4286     (easy-menu-define
4287      gnus-article-treatment-menu gnus-article-mode-map ""
4288      ;; Fixme: this should use :active (and maybe :visible).
4289      '("Treatment"
4290        ["Hide headers" gnus-article-hide-headers t]
4291        ["Hide signature" gnus-article-hide-signature t]
4292        ["Hide citation" gnus-article-hide-citation t]
4293        ["Treat overstrike" gnus-article-treat-overstrike t]
4294        ["Treat ANSI sequences" gnus-article-treat-ansi-sequences t]
4295        ["Remove carriage return" gnus-article-remove-cr t]
4296        ["Remove leading whitespace" gnus-article-remove-leading-whitespace t]
4297        ["Remove quoted-unreadable" gnus-article-de-quoted-unreadable t]
4298        ["Remove base64" gnus-article-de-base64-unreadable t]
4299        ["Treat html" gnus-article-wash-html t]
4300        ["Remove newlines from within URLs" gnus-article-unsplit-urls t]
4301        ["Decode HZ" gnus-article-decode-HZ t]))
4302
4303     ;; Note "Commands" menu is defined in gnus-sum.el for consistency
4304
4305     ;; Note "Post" menu is defined in gnus-sum.el for consistency
4306
4307     (gnus-run-hooks 'gnus-article-menu-hook)))
4308
4309 (defun gnus-article-mode ()
4310   "Major mode for displaying an article.
4311
4312 All normal editing commands are switched off.
4313
4314 The following commands are available in addition to all summary mode
4315 commands:
4316 \\<gnus-article-mode-map>
4317 \\[gnus-article-next-page]\t Scroll the article one page forwards
4318 \\[gnus-article-prev-page]\t Scroll the article one page backwards
4319 \\[gnus-article-refer-article]\t Go to the article referred to by an article id near point
4320 \\[gnus-article-show-summary]\t Display the summary buffer
4321 \\[gnus-article-mail]\t Send a reply to the address near point
4322 \\[gnus-article-describe-briefly]\t Describe the current mode briefly
4323 \\[gnus-info-find-node]\t Go to the Gnus info node"
4324   (interactive)
4325   (kill-all-local-variables)
4326   (gnus-simplify-mode-line)
4327   (setq mode-name "Article")
4328   (setq major-mode 'gnus-article-mode)
4329   (make-local-variable 'minor-mode-alist)
4330   (use-local-map gnus-article-mode-map)
4331   (when (gnus-visual-p 'article-menu 'menu)
4332     (gnus-article-make-menu-bar)
4333     (when gnus-summary-tool-bar-map
4334       (set (make-local-variable 'tool-bar-map) gnus-summary-tool-bar-map)))
4335   (gnus-update-format-specifications nil 'article-mode)
4336   (set (make-local-variable 'page-delimiter) gnus-page-delimiter)
4337   (set (make-local-variable 'gnus-page-broken) nil)
4338   (make-local-variable 'gnus-button-marker-list)
4339   (make-local-variable 'gnus-article-current-summary)
4340   (make-local-variable 'gnus-article-mime-handles)
4341   (make-local-variable 'gnus-article-decoded-p)
4342   (make-local-variable 'gnus-article-mime-handle-alist)
4343   (make-local-variable 'gnus-article-wash-types)
4344   (make-local-variable 'gnus-article-image-alist)
4345   (make-local-variable 'gnus-article-charset)
4346   (make-local-variable 'gnus-article-ignored-charsets)
4347   ;; Prevent Emacs 22 from displaying non-break space with `nobreak-space'
4348   ;; face.
4349   (set (make-local-variable 'nobreak-char-display) nil)
4350   (setq cursor-in-non-selected-windows nil)
4351   (setq truncate-lines gnus-article-truncate-lines)
4352   (gnus-set-default-directory)
4353   (buffer-disable-undo)
4354   (setq buffer-read-only t
4355         show-trailing-whitespace nil)
4356   (set-syntax-table gnus-article-mode-syntax-table)
4357   (mm-enable-multibyte)
4358   (gnus-run-mode-hooks 'gnus-article-mode-hook))
4359
4360 (defvar gnus-button-marker-list nil
4361   "Regexp matching any of the regexps from `gnus-button-alist'.
4362 Internal variable.")
4363
4364 (defun gnus-article-setup-buffer ()
4365   "Initialize the article buffer."
4366   (let* ((name (if gnus-single-article-buffer "*Article*"
4367                  (concat "*Article " gnus-newsgroup-name "*")))
4368          (original
4369           (progn (string-match "\\*Article" name)
4370                  (concat " *Original Article"
4371                          (substring name (match-end 0))))))
4372     (setq gnus-article-buffer name)
4373     (setq gnus-original-article-buffer original)
4374     (setq gnus-article-mime-handle-alist nil)
4375     (with-current-buffer gnus-summary-buffer
4376       ;; This might be a variable local to the summary buffer.
4377       (unless gnus-single-article-buffer
4378         (setq gnus-article-buffer name)
4379         (setq gnus-original-article-buffer original)
4380         (gnus-set-global-variables)))
4381     (gnus-article-setup-highlight-words)
4382     ;; Init original article buffer.
4383     (with-current-buffer (gnus-get-buffer-create gnus-original-article-buffer)
4384       (mm-enable-multibyte)
4385       (setq major-mode 'gnus-original-article-mode)
4386       (make-local-variable 'gnus-original-article))
4387     (if (and (get-buffer name)
4388              (with-current-buffer name
4389                (if gnus-article-edit-mode
4390                    (if (y-or-n-p "Article mode edit in progress; discard? ")
4391                        (progn
4392                          (set-buffer-modified-p nil)
4393                          (gnus-kill-buffer name)
4394                          (message "")
4395                          nil)
4396                      (error "Action aborted"))
4397                  t)))
4398         (with-current-buffer name
4399           (set (make-local-variable 'gnus-article-edit-mode) nil)
4400           (when gnus-article-mime-handles
4401             (mm-destroy-parts gnus-article-mime-handles)
4402             (setq gnus-article-mime-handles nil))
4403           ;; Set it to nil in article-buffer!
4404           (setq gnus-article-mime-handle-alist nil)
4405           (buffer-disable-undo)
4406           (setq buffer-read-only t)
4407           ;; This list just keeps growing if we don't reset it.
4408           (setq gnus-button-marker-list nil)
4409           (unless (eq major-mode 'gnus-article-mode)
4410             (gnus-article-mode))
4411           (current-buffer))
4412       (with-current-buffer (gnus-get-buffer-create name)
4413         (gnus-article-mode)
4414         (make-local-variable 'gnus-summary-buffer)
4415         (setq gnus-summary-buffer
4416               (gnus-summary-buffer-name gnus-newsgroup-name))
4417         (gnus-summary-set-local-parameters gnus-newsgroup-name)
4418         (current-buffer)))))
4419
4420 ;; Set article window start at LINE, where LINE is the number of lines
4421 ;; from the head of the article.
4422 (defun gnus-article-set-window-start (&optional line)
4423   (let ((article-window (gnus-get-buffer-window gnus-article-buffer t)))
4424     (when article-window
4425       (set-window-start
4426        article-window
4427        (with-current-buffer gnus-article-buffer
4428          (goto-char (point-min))
4429          (if (not line)
4430              (point-min)
4431            (gnus-message 6 "Moved to bookmark")
4432            (search-forward "\n\n" nil t)
4433            (forward-line line)
4434            (point)))))))
4435
4436 (defun gnus-article-prepare (article &optional all-headers header)
4437   "Prepare ARTICLE in article mode buffer.
4438 ARTICLE should either be an article number or a Message-ID.
4439 If ARTICLE is an id, HEADER should be the article headers.
4440 If ALL-HEADERS is non-nil, no headers are hidden."
4441   (save-excursion
4442     ;; Make sure we start in a summary buffer.
4443     (unless (eq major-mode 'gnus-summary-mode)
4444       (set-buffer gnus-summary-buffer))
4445     (setq gnus-summary-buffer (current-buffer))
4446     (let* ((gnus-article (if header (mail-header-number header) article))
4447            (summary-buffer (current-buffer))
4448            (gnus-tmp-internal-hook gnus-article-internal-prepare-hook)
4449            (group gnus-newsgroup-name)
4450            result)
4451       (save-excursion
4452         (gnus-article-setup-buffer)
4453         (set-buffer gnus-article-buffer)
4454         ;; Deactivate active regions.
4455         (when (and (boundp 'transient-mark-mode)
4456                    transient-mark-mode)
4457           (setq mark-active nil))
4458         (if (not (setq result (let ((inhibit-read-only t))
4459                                 (gnus-request-article-this-buffer
4460                                  article group))))
4461             ;; There is no such article.
4462             (save-excursion
4463               (when (and (numberp article)
4464                          (not (memq article gnus-newsgroup-sparse)))
4465                 (setq gnus-article-current
4466                       (cons gnus-newsgroup-name article))
4467                 (set-buffer gnus-summary-buffer)
4468                 (setq gnus-current-article article)
4469                 (if (and (memq article gnus-newsgroup-undownloaded)
4470                          (not (gnus-online (gnus-find-method-for-group
4471                                             gnus-newsgroup-name))))
4472                     (progn
4473                       (gnus-summary-set-agent-mark article)
4474                       (message "Message marked for downloading"))
4475                   (gnus-summary-mark-article article gnus-canceled-mark)
4476                   (unless (memq article gnus-newsgroup-sparse)
4477                     (gnus-error 1 "No such article (may have expired or been canceled)")))))
4478           (if (or (eq result 'pseudo)
4479                   (eq result 'nneething))
4480               (progn
4481                 (with-current-buffer summary-buffer
4482                   (push article gnus-newsgroup-history)
4483                   (setq gnus-last-article gnus-current-article
4484                         gnus-current-article 0
4485                         gnus-current-headers nil
4486                         gnus-article-current nil)
4487                   (if (eq result 'nneething)
4488                       (gnus-configure-windows 'summary)
4489                     (gnus-configure-windows 'article))
4490                   (gnus-set-global-variables))
4491                 (let ((gnus-article-mime-handle-alist-1
4492                        gnus-article-mime-handle-alist))
4493                   (gnus-set-mode-line 'article)))
4494             ;; The result from the `request' was an actual article -
4495             ;; or at least some text that is now displayed in the
4496             ;; article buffer.
4497             (when (and (numberp article)
4498                        (not (eq article gnus-current-article)))
4499               ;; Seems like a new article has been selected.
4500               ;; `gnus-current-article' must be an article number.
4501               (with-current-buffer summary-buffer
4502                 (push article gnus-newsgroup-history)
4503                 (setq gnus-last-article gnus-current-article
4504                       gnus-current-article article
4505                       gnus-current-headers
4506                       (gnus-summary-article-header gnus-current-article)
4507                       gnus-article-current
4508                       (cons gnus-newsgroup-name gnus-current-article))
4509                 (unless (vectorp gnus-current-headers)
4510                   (setq gnus-current-headers nil))
4511                 (gnus-summary-goto-subject gnus-current-article)
4512                 (when (gnus-summary-show-thread)
4513                   ;; If the summary buffer really was folded, the
4514                   ;; previous goto may not actually have gone to
4515                   ;; the right article, but the thread root instead.
4516                   ;; So we go again.
4517                   (gnus-summary-goto-subject gnus-current-article))
4518                 (gnus-run-hooks 'gnus-mark-article-hook)
4519                 (gnus-set-mode-line 'summary)
4520                 (when (gnus-visual-p 'article-highlight 'highlight)
4521                   (gnus-run-hooks 'gnus-visual-mark-article-hook))
4522                 ;; Set the global newsgroup variables here.
4523                 (gnus-set-global-variables)
4524                 (setq gnus-have-all-headers
4525                       (or all-headers gnus-show-all-headers))))
4526             (save-excursion
4527               (gnus-configure-windows 'article))
4528             (when (or (numberp article)
4529                       (stringp article))
4530               (gnus-article-prepare-display)
4531               ;; Do page break.
4532               (goto-char (point-min))
4533               (when gnus-break-pages
4534                 (gnus-narrow-to-page)))
4535             (let ((gnus-article-mime-handle-alist-1
4536                    gnus-article-mime-handle-alist))
4537               (gnus-set-mode-line 'article))
4538             (article-goto-body)
4539             (unless (bobp)
4540               (forward-line -1))
4541             (set-window-point (get-buffer-window (current-buffer)) (point))
4542             (gnus-configure-windows 'article)
4543             t))))))
4544
4545 ;;;###autoload
4546 (defun gnus-article-prepare-display ()
4547   "Make the current buffer look like a nice article."
4548   ;; Hooks for getting information from the article.
4549   ;; This hook must be called before being narrowed.
4550   (let ((gnus-article-buffer (current-buffer))
4551         buffer-read-only
4552         (inhibit-read-only t))
4553     (unless (eq major-mode 'gnus-article-mode)
4554       (gnus-article-mode))
4555     (setq buffer-read-only nil
4556           gnus-article-wash-types nil
4557           gnus-article-image-alist nil)
4558     (gnus-run-hooks 'gnus-tmp-internal-hook)
4559     (when gnus-display-mime-function
4560       (funcall gnus-display-mime-function))
4561     (gnus-run-hooks 'gnus-article-prepare-hook)))
4562
4563 ;;;
4564 ;;; Gnus Sticky Article Mode
4565 ;;;
4566
4567 (define-derived-mode gnus-sticky-article-mode gnus-article-mode "StickyArticle"
4568   "Mode for sticky articles."
4569   ;; Release bindings that won't work.
4570   (substitute-key-definition 'gnus-article-read-summary-keys 'undefined
4571                              gnus-sticky-article-mode-map)
4572   (substitute-key-definition 'gnus-article-refer-article 'undefined
4573                              gnus-sticky-article-mode-map)
4574   (dolist (k '("e" "h" "s" "F" "R"))
4575     (define-key gnus-sticky-article-mode-map k nil))
4576   (define-key gnus-sticky-article-mode-map "k" 'gnus-kill-sticky-article-buffer)
4577   (define-key gnus-sticky-article-mode-map "q" 'bury-buffer)
4578   (define-key gnus-sticky-article-mode-map "\C-hc" 'describe-key-briefly)
4579   (define-key gnus-sticky-article-mode-map "\C-hk" 'describe-key))
4580
4581 (defun gnus-sticky-article (arg)
4582   "Make the current article sticky.
4583 If a prefix ARG is given, ask for a name for this sticky article buffer."
4584   (interactive "P")
4585   (gnus-summary-show-thread)
4586   (gnus-summary-select-article nil nil 'pseudo)
4587   (let (new-art-buf-name)
4588     (gnus-eval-in-buffer-window gnus-article-buffer
4589       (setq new-art-buf-name
4590             (concat
4591              "*Sticky Article: "
4592              (if arg
4593                  (read-from-minibuffer "Sticky article buffer name: ")
4594                (gnus-with-article-headers
4595                  (gnus-article-goto-header "subject")
4596                  (setq new-art-buf-name
4597                        (buffer-substring-no-properties
4598                         (line-beginning-position) (line-end-position)))
4599                  (goto-char (point-min))
4600                  (gnus-article-goto-header "from")
4601                  (setq new-art-buf-name
4602                        (concat
4603                         new-art-buf-name ", "
4604                         (buffer-substring-no-properties
4605                          (line-beginning-position) (line-end-position))))
4606                  (goto-char (point-min))
4607                  (gnus-article-goto-header "date")
4608                  (setq new-art-buf-name
4609                        (concat
4610                         new-art-buf-name ", "
4611                         (buffer-substring-no-properties
4612                          (line-beginning-position) (line-end-position))))))
4613              "*"))
4614       (if (and (gnus-buffer-live-p new-art-buf-name)
4615                (with-current-buffer new-art-buf-name
4616                  (eq major-mode 'gnus-sticky-article-mode)))
4617           (switch-to-buffer new-art-buf-name)
4618         (setq new-art-buf-name (rename-buffer new-art-buf-name t)))
4619       (gnus-sticky-article-mode))
4620     (setq gnus-article-buffer new-art-buf-name))
4621   (gnus-summary-recenter)
4622   (gnus-summary-position-point))
4623
4624 (defun gnus-kill-sticky-article-buffer (&optional buffer)
4625   "Kill the given sticky article BUFFER.
4626 If none is given, assume the current buffer and kill it if it has
4627 `gnus-sticky-article-mode'."
4628   (interactive)
4629   (unless buffer
4630     (setq buffer (current-buffer)))
4631   (with-current-buffer buffer
4632     (when (eq major-mode 'gnus-sticky-article-mode)
4633       (gnus-kill-buffer buffer))))
4634
4635 (defun gnus-kill-sticky-article-buffers (arg)
4636   "Kill all sticky article buffers.
4637 If a prefix ARG is given, ask for confirmation."
4638   (interactive "P")
4639   (dolist (buf (gnus-buffers))
4640     (with-current-buffer buf
4641       (when (eq major-mode 'gnus-sticky-article-mode)
4642         (if (not arg)
4643             (gnus-kill-buffer buf)
4644           (when (yes-or-no-p (concat "Kill buffer " (buffer-name buf) "? "))
4645             (gnus-kill-buffer buf)))))))
4646
4647 ;;;
4648 ;;; Gnus MIME viewing functions
4649 ;;;
4650
4651 (defvar gnus-mime-button-line-format "%{%([%p. %d%T]%)%}%e\n"
4652   "Format of the MIME buttons.
4653
4654 Valid specifiers include:
4655 %t  The MIME type
4656 %T  MIME type, along with additional info
4657 %n  The `name' parameter
4658 %d  The description, if any
4659 %l  The length of the encoded part
4660 %p  The part identifier number
4661 %e  Dots if the part isn't displayed
4662
4663 General format specifiers can also be used.  See Info node
4664 `(gnus)Formatting Variables'.")
4665
4666 (defvar gnus-mime-button-line-format-alist
4667   '((?t gnus-tmp-type ?s)
4668     (?T gnus-tmp-type-long ?s)
4669     (?n gnus-tmp-name ?s)
4670     (?d gnus-tmp-description ?s)
4671     (?p gnus-tmp-id ?s)
4672     (?l gnus-tmp-length ?d)
4673     (?e gnus-tmp-dots ?s)))
4674
4675 (defvar gnus-mime-button-commands
4676   '((gnus-article-press-button "\r" "Toggle Display")
4677     (gnus-mime-view-part "v" "View Interactively...")
4678     (gnus-mime-view-part-as-type "t" "View As Type...")
4679     (gnus-mime-view-part-as-charset "C" "View As charset...")
4680     (gnus-mime-save-part "o" "Save...")
4681     (gnus-mime-save-part-and-strip "\C-o" "Save and Strip")
4682     (gnus-mime-replace-part "r" "Replace part")
4683     (gnus-mime-delete-part "d" "Delete part")
4684     (gnus-mime-copy-part "c" "View As Text, In Other Buffer")
4685     (gnus-mime-inline-part "i" "View As Text, In This Buffer")
4686     (gnus-mime-view-part-internally "E" "View Internally") ;; Why `E'?
4687     (gnus-mime-view-part-externally "e" "View Externally")
4688     (gnus-mime-print-part "p" "Print")
4689     (gnus-mime-pipe-part "|" "Pipe To Command...")
4690     (gnus-mime-action-on-part "." "Take action on the part...")))
4691
4692 (defun gnus-article-mime-part-status ()
4693   (if gnus-article-mime-handle-alist-1
4694       (if (eq 1 (length gnus-article-mime-handle-alist-1))
4695           " (1 part)"
4696         (format " (%d parts)" (length gnus-article-mime-handle-alist-1)))
4697     ""))
4698
4699 (defvar gnus-mime-button-map
4700   (let ((map (make-sparse-keymap)))
4701     (define-key map gnus-mouse-2 'gnus-article-push-button)
4702     (define-key map gnus-down-mouse-3 'gnus-mime-button-menu)
4703     (dolist (c gnus-mime-button-commands)
4704       (define-key map (cadr c) (car c)))
4705     map))
4706
4707 (easy-menu-define
4708   gnus-mime-button-menu gnus-mime-button-map "MIME button menu."
4709   `("MIME Part"
4710     ,@(mapcar (lambda (c)
4711                 (vector (caddr c) (car c) :active t))
4712               gnus-mime-button-commands)))
4713
4714 (defun gnus-mime-button-menu (event prefix)
4715  "Construct a context-sensitive menu of MIME commands."
4716  (interactive "e\nP")
4717  (save-window-excursion
4718    (let ((pos (event-start event)))
4719      (select-window (posn-window pos))
4720      (goto-char (posn-point pos))
4721      (gnus-article-check-buffer)
4722      (popup-menu gnus-mime-button-menu nil prefix))))
4723
4724 (defun gnus-mime-view-all-parts (&optional handles)
4725   "View all the MIME parts."
4726   (interactive)
4727   (with-current-buffer gnus-article-buffer
4728     (let ((handles (or handles gnus-article-mime-handles))
4729           (mail-parse-charset gnus-newsgroup-charset)
4730           (mail-parse-ignored-charsets
4731            (with-current-buffer gnus-summary-buffer
4732              gnus-newsgroup-ignored-charsets)))
4733       (when handles
4734         (mm-remove-parts handles)
4735         (goto-char (point-min))
4736         (or (search-forward "\n\n") (goto-char (point-max)))
4737         (let ((inhibit-read-only t))
4738           (delete-region (point) (point-max))
4739           (mm-display-parts handles))))))
4740
4741 (defun gnus-article-jump-to-part (n)
4742   "Jump to MIME part N."
4743   (interactive "P")
4744   (pop-to-buffer gnus-article-buffer)
4745   ;; FIXME: why is it necessary?
4746   (sit-for 0)
4747   (let ((parts (length gnus-article-mime-handle-alist)))
4748     (or n (setq n
4749                 (string-to-number
4750                  (read-string ;; Emacs 21 doesn't have `read-number'.
4751                   (format "Jump to part (2..%s): " parts)))))
4752     (unless (and (integerp n) (<= n parts) (>= n 1))
4753       (setq n
4754             (progn
4755               (gnus-message 7 "Invalid part `%s', using %s instead."
4756                             n parts)
4757               parts)))
4758     (gnus-message 9 "Jumping to part %s." n)
4759     (cond ((>= gnus-auto-select-part 1)
4760            (while (and (<= n parts)
4761                        (not (gnus-article-goto-part n)))
4762              (setq n (1+ n))))
4763           ((< gnus-auto-select-part 0)
4764            (while (and (>= n 1)
4765                        (not (gnus-article-goto-part n)))
4766              (setq n (1- n))))
4767           (t
4768            (gnus-article-goto-part n)))))
4769
4770 (eval-when-compile
4771   (defsubst gnus-article-edit-part (handles &optional current-id)
4772     "Edit an article in order to delete a mime part.
4773 This function is exclusively used by `gnus-mime-save-part-and-strip'
4774 and `gnus-mime-delete-part', and not provided at run-time normally."
4775     (gnus-article-edit-article
4776      `(lambda ()
4777         (buffer-disable-undo)
4778         (erase-buffer)
4779         (let ((mail-parse-charset (or gnus-article-charset
4780                                       ',gnus-newsgroup-charset))
4781               (mail-parse-ignored-charsets
4782                (or gnus-article-ignored-charsets
4783                    ',gnus-newsgroup-ignored-charsets))
4784               (mbl mml-buffer-list))
4785           (setq mml-buffer-list nil)
4786           (insert-buffer-substring gnus-original-article-buffer)
4787           (mime-to-mml ',handles)
4788           (setq gnus-article-mime-handles nil)
4789           (let ((mbl1 mml-buffer-list))
4790             (setq mml-buffer-list mbl)
4791             (set (make-local-variable 'mml-buffer-list) mbl1))
4792           (gnus-make-local-hook 'kill-buffer-hook)
4793           (add-hook 'kill-buffer-hook 'mml-destroy-buffers t t)))
4794      `(lambda (no-highlight)
4795         (let ((mail-parse-charset (or gnus-article-charset
4796                                       ',gnus-newsgroup-charset))
4797               (message-options message-options)
4798               (message-options-set-recipient)
4799               (mail-parse-ignored-charsets
4800                (or gnus-article-ignored-charsets
4801                    ',gnus-newsgroup-ignored-charsets)))
4802           (mml-to-mime)
4803           (mml-destroy-buffers)
4804           (remove-hook 'kill-buffer-hook
4805                        'mml-destroy-buffers t)
4806           (kill-local-variable 'mml-buffer-list))
4807         (gnus-summary-edit-article-done
4808          ,(or (mail-header-references gnus-current-headers) "")
4809          ,(gnus-group-read-only-p)
4810          ,gnus-summary-buffer no-highlight))
4811      t)
4812     (gnus-article-edit-done)
4813     (gnus-summary-expand-window)
4814     (gnus-summary-show-article)
4815     (when (and current-id (integerp gnus-auto-select-part))
4816       (gnus-article-jump-to-part
4817        (if (text-property-any (point-min) (point-max)
4818                               'gnus-part (+ current-id gnus-auto-select-part))
4819            (+ current-id gnus-auto-select-part)
4820          (with-current-buffer gnus-article-buffer
4821            (length gnus-article-mime-handle-alist)))))))
4822
4823 (defun gnus-mime-replace-part (file)
4824   "Replace MIME part under point with an external body."
4825   ;; Useful if file has already been saved to disk
4826   (interactive
4827    (list
4828     (read-file-name "Replace MIME part with file: "
4829                     (or mm-default-directory default-directory)
4830                     nil nil)))
4831   (gnus-mime-save-part-and-strip file))
4832
4833 (defun gnus-mime-save-part-and-strip (&optional file)
4834   "Save the MIME part under point then replace it with an external body.
4835 If FILE is given, use it for the external part."
4836   (interactive)
4837   (gnus-article-check-buffer)
4838   (when (gnus-group-read-only-p)
4839     (error "The current group does not support deleting of parts"))
4840   (when (mm-complicated-handles gnus-article-mime-handles)
4841     (error "\
4842 The current article has a complicated MIME structure, giving up..."))
4843   (let* ((data (get-text-property (point) 'gnus-data))
4844          (id (get-text-property (point) 'gnus-part))
4845          param
4846          (handles gnus-article-mime-handles))
4847     (unless file
4848       (setq file
4849             (and data (mm-save-part data "Delete MIME part and save to: "))))
4850     (when file
4851       (with-current-buffer (mm-handle-buffer data)
4852         (erase-buffer)
4853         (insert "Content-Type: " (mm-handle-media-type data))
4854         (mml-insert-parameter-string (cdr (mm-handle-type data))
4855                                      '(charset))
4856         ;; Add a filename for the sake of saving the part again.
4857         (mml-insert-parameter
4858          (mail-header-encode-parameter "name" (file-name-nondirectory file)))
4859         (insert "\n")
4860         (insert "Content-ID: " (message-make-message-id) "\n")
4861         (insert "Content-Transfer-Encoding: binary\n")
4862         (insert "\n"))
4863       (setcdr data
4864               (cdr (mm-make-handle nil
4865                                    `("message/external-body"
4866                                      (access-type . "LOCAL-FILE")
4867                                      (name . ,file)))))
4868       ;; (set-buffer gnus-summary-buffer)
4869       (gnus-article-edit-part handles id))))
4870
4871 ;; A function like `gnus-summary-save-parts' (`X m', `<MIME> <Extract all
4872 ;; parts...>') but with stripping would be nice.
4873
4874 (defun gnus-mime-delete-part ()
4875   "Delete the MIME part under point.
4876 Replace it with some information about the removed part."
4877   (interactive)
4878   (gnus-article-check-buffer)
4879   (when (gnus-group-read-only-p)
4880     (error "The current group does not support deleting of parts"))
4881   (when (mm-complicated-handles gnus-article-mime-handles)
4882     (error "\
4883 The current article has a complicated MIME structure, giving up..."))
4884   (when (or gnus-expert-user
4885             (gnus-yes-or-no-p "\
4886 Deleting parts may malfunction or destroy the article; continue? "))
4887     (let* ((data (get-text-property (point) 'gnus-data))
4888            (id (get-text-property (point) 'gnus-part))
4889            (handles gnus-article-mime-handles)
4890            (none "(none)")
4891            (description
4892             (let ((desc (mm-handle-description data)))
4893               (when desc
4894                 (mail-decode-encoded-word-string desc))))
4895            (filename
4896             (or (mail-content-type-get (mm-handle-disposition data) 'filename)
4897                 none))
4898            (type (mm-handle-media-type data)))
4899       (unless data
4900         (error "No MIME part under point"))
4901       (with-current-buffer (mm-handle-buffer data)
4902         (let ((bsize (format "%s" (buffer-size))))
4903           (erase-buffer)
4904           (insert
4905            (concat
4906             ",----\n"
4907             "| The following attachment has been deleted:\n"
4908             "|\n"
4909             "| Type:           " type "\n"
4910             "| Filename:       " filename "\n"
4911             "| Size (encoded): " bsize " Byte\n"
4912             (when description
4913               (concat    "| Description:    " description "\n"))
4914             "`----\n"))
4915           (setcdr data
4916                   (cdr (mm-make-handle
4917                         nil `("text/plain") nil nil
4918                         (list "attachment")
4919                         (format "Deleted attachment (%s bytes)" bsize))))))
4920       ;; (set-buffer gnus-summary-buffer)
4921       (gnus-article-edit-part handles id))))
4922
4923 (defun gnus-mime-save-part ()
4924   "Save the MIME part under point."
4925   (interactive)
4926   (gnus-article-check-buffer)
4927   (let ((data (get-text-property (point) 'gnus-data)))
4928     (when data
4929       (mm-save-part data))))
4930
4931 (defun gnus-mime-pipe-part ()
4932   "Pipe the MIME part under point to a process."
4933   (interactive)
4934   (gnus-article-check-buffer)
4935   (let ((data (get-text-property (point) 'gnus-data)))
4936     (when data
4937       (mm-pipe-part data))))
4938
4939 (defun gnus-mime-view-part ()
4940   "Interactively choose a viewing method for the MIME part under point."
4941   (interactive)
4942   (gnus-article-check-buffer)
4943   (let ((data (get-text-property (point) 'gnus-data)))
4944     (when data
4945       (setq gnus-article-mime-handles
4946             (mm-merge-handles
4947              gnus-article-mime-handles (setq data (copy-sequence data))))
4948       (mm-interactively-view-part data))))
4949
4950 (defun gnus-mime-view-part-as-type-internal ()
4951   (gnus-article-check-buffer)
4952   (let* ((handle (get-text-property (point) 'gnus-data))
4953          (name (or
4954                 ;; Content-Type: foo/bar; name=...
4955                 (mail-content-type-get (mm-handle-type handle) 'name)
4956                 ;; Content-Disposition: attachment; filename=...
4957                 (cdr (assq 'filename (cdr (mm-handle-disposition handle))))))
4958          (def-type (and name (mm-default-file-encoding name))))
4959     (or (and def-type (cons def-type 0))
4960         (and handle
4961              (equal (mm-handle-media-supertype handle) "text")
4962              '("text/plain" . 0))
4963         '("application/octet-stream" . 0))))
4964
4965 (defun gnus-mime-view-part-as-type (&optional mime-type pred)
4966   "Choose a MIME media type, and view the part as such.
4967 If non-nil, PRED is a predicate to use during completion to limit the
4968 available media-types."
4969   (interactive)
4970   (unless mime-type
4971     (setq mime-type
4972           (let ((default (gnus-mime-view-part-as-type-internal)))
4973             (completing-read
4974              (format "View as MIME type (default %s): "
4975                      (car default))
4976              (mapcar #'list (mailcap-mime-types))
4977              pred nil nil nil
4978              (car default)))))
4979   (gnus-article-check-buffer)
4980   (let ((handle (get-text-property (point) 'gnus-data)))
4981     (when handle
4982       (when (equal (mm-handle-media-type handle) "message/external-body")
4983         (unless (mm-handle-cache handle)
4984           (mm-extern-cache-contents handle))
4985         (setq handle (mm-handle-cache handle)))
4986       (setq handle
4987             (mm-make-handle (mm-handle-buffer handle)
4988                             (cons mime-type (cdr (mm-handle-type handle)))
4989                             (mm-handle-encoding handle)
4990                             (mm-handle-undisplayer handle)
4991                             (mm-handle-disposition handle)
4992                             (mm-handle-description handle)
4993                             nil
4994                             (mm-handle-id handle)))
4995       (setq gnus-article-mime-handles
4996             (mm-merge-handles gnus-article-mime-handles handle))
4997       (when (mm-handle-displayed-p handle)
4998         (mm-remove-part handle))
4999       (gnus-mm-display-part handle))))
5000
5001 (defun gnus-mime-copy-part (&optional handle arg)
5002   "Put the MIME part under point into a new buffer.
5003 If `auto-compression-mode' is enabled, compressed files like .gz and .bz2
5004 are decompressed."
5005   (interactive (list nil current-prefix-arg))
5006   (gnus-article-check-buffer)
5007   (unless handle
5008     (setq handle (get-text-property (point) 'gnus-data)))
5009   (when handle
5010     (let ((filename (or (mail-content-type-get (mm-handle-type handle)
5011                                                'name)
5012                         (mail-content-type-get (mm-handle-disposition handle)
5013                                                'filename)))
5014           contents dont-decode charset coding-system)
5015       (mm-with-unibyte-buffer
5016         (mm-insert-part handle)
5017         (setq contents (or (condition-case nil
5018                                (mm-decompress-buffer filename nil 'sig)
5019                              (error
5020                               (setq dont-decode t)
5021                               nil))
5022                            (buffer-string))))
5023       (setq filename (cond (filename (file-name-nondirectory filename))
5024                            (dont-decode "*raw data*")
5025                            (t "*decoded*")))
5026       (cond
5027        (dont-decode)
5028        ((not arg)
5029         (unless (setq charset (mail-content-type-get
5030                                (mm-handle-type handle) 'charset))
5031           (unless (setq coding-system (mm-with-unibyte-buffer
5032                                         (insert contents)
5033                                         (mm-find-buffer-file-coding-system)))
5034             (setq charset gnus-newsgroup-charset))))
5035        ((numberp arg)
5036         (setq charset (or (cdr (assq arg
5037                                      gnus-summary-show-article-charset-alist))
5038                           (mm-read-coding-system "Charset: ")))))
5039       (switch-to-buffer (generate-new-buffer filename))
5040       (if (or coding-system
5041               (and charset
5042                    (setq coding-system (mm-charset-to-coding-system charset))
5043                    (not (eq charset 'ascii))))
5044           (progn
5045             (mm-enable-multibyte)
5046             (insert (mm-decode-coding-string contents coding-system))
5047             (setq buffer-file-coding-system
5048                   (if (boundp 'last-coding-system-used)
5049                       (symbol-value 'last-coding-system-used)
5050                     coding-system)))
5051         (mm-disable-multibyte)
5052         (insert contents)
5053         (setq buffer-file-coding-system mm-binary-coding-system))
5054       ;; We do it this way to make `normal-mode' set the appropriate mode.
5055       (unwind-protect
5056           (progn
5057             (setq buffer-file-name (expand-file-name filename))
5058             (normal-mode))
5059         (setq buffer-file-name nil))
5060       (goto-char (point-min)))))
5061
5062 (defun gnus-mime-print-part (&optional handle filename)
5063   "Print the MIME part under point."
5064   (interactive (list nil (ps-print-preprint current-prefix-arg)))
5065   (gnus-article-check-buffer)
5066   (let* ((handle (or handle (get-text-property (point) 'gnus-data)))
5067          (contents (and handle (mm-get-part handle)))
5068          (file (mm-make-temp-file (expand-file-name "mm." mm-tmp-directory)))
5069          (printer (mailcap-mime-info (mm-handle-media-type handle) "print")))
5070     (when contents
5071         (if printer
5072             (unwind-protect
5073                 (progn
5074                   (mm-save-part-to-file handle file)
5075                   (call-process shell-file-name nil
5076                                 (generate-new-buffer " *mm*")
5077                                 nil
5078                                 shell-command-switch
5079                                 (mm-mailcap-command
5080                                  printer file (mm-handle-type handle))))
5081               (delete-file file))
5082           (with-temp-buffer
5083             (insert contents)
5084             (gnus-print-buffer))
5085           (ps-despool filename)))))
5086
5087 (defun gnus-mime-inline-part (&optional handle arg)
5088   "Insert the MIME part under point into the current buffer.
5089 Compressed files like .gz and .bz2 are decompressed."
5090   (interactive (list nil current-prefix-arg))
5091   (gnus-article-check-buffer)
5092   (unless handle
5093     (setq handle (get-text-property (point) 'gnus-data)))
5094   (when handle
5095     (let ((b (point))
5096           (inhibit-read-only t)
5097           contents charset coding-system)
5098       (if (and (not arg) (mm-handle-undisplayer handle))
5099           (mm-remove-part handle)
5100         (mm-with-unibyte-buffer
5101           (mm-insert-part handle)
5102           (setq contents
5103                 (or (mm-decompress-buffer
5104                      (or (mail-content-type-get (mm-handle-type handle)
5105                                                 'name)
5106                          (mail-content-type-get (mm-handle-disposition handle)
5107                                                 'filename))
5108                      nil t)
5109                     (buffer-string))))
5110         (cond
5111          ((not arg)
5112           (unless (setq charset (mail-content-type-get
5113                                  (mm-handle-type handle) 'charset))
5114             (unless (setq coding-system
5115                           (mm-with-unibyte-buffer
5116                             (insert contents)
5117                             (mm-find-buffer-file-coding-system)))
5118               (setq charset gnus-newsgroup-charset))))
5119          ((numberp arg)
5120           (if (mm-handle-undisplayer handle)
5121               (mm-remove-part handle))
5122           (setq charset
5123                 (or (cdr (assq arg
5124                                gnus-summary-show-article-charset-alist))
5125                     (mm-read-coding-system "Charset: "))))
5126          (t
5127           (if (mm-handle-undisplayer handle)
5128               (mm-remove-part handle))))
5129         (forward-line 2)
5130         (mm-insert-inline
5131          handle
5132          (if (or coding-system
5133                  (and charset
5134                       (setq coding-system
5135                             (mm-charset-to-coding-system charset))
5136                       (not (eq coding-system 'ascii))))
5137              (mm-decode-coding-string contents coding-system)
5138            (mm-string-to-multibyte contents)))
5139         (goto-char b)))))
5140
5141 (defun gnus-mime-set-charset-parameters (handle)
5142   "Set charset to parameters in HANDLE.
5143 The value of `gnus-newsgroup-charset' is used as a charset."
5144   (if (stringp (car handle))
5145       (mapc #'gnus-mime-strip-charset-parameters (cdr handle))
5146     (let* ((type (mm-handle-type (if (equal (mm-handle-media-type handle)
5147                                             "message/external-body")
5148                                      (progn
5149                                        (unless (mm-handle-cache handle)
5150                                          (mm-extern-cache-contents handle))
5151                                        (mm-handle-cache handle))
5152                                    handle)))
5153            (charset (assq 'charset (cdr type))))
5154       (if charset
5155           (setcdr charset (symbol-name gnus-newsgroup-charset))
5156         (setcdr type (cons (cons 'charset (symbol-name gnus-newsgroup-charset))
5157                            (cdr type)))))))
5158
5159 (defun gnus-mime-view-part-as-charset (&optional handle arg)
5160   "Insert the MIME part under point into the current buffer using the
5161 specified charset."
5162   (interactive (list nil current-prefix-arg))
5163   (gnus-article-check-buffer)
5164   (let ((handle (or handle (get-text-property (point) 'gnus-data)))
5165         (fun (get-text-property (point) 'gnus-callback))
5166         (gnus-newsgroup-ignored-charsets 'gnus-all)
5167         gnus-newsgroup-charset form preferred parts)
5168     (when handle
5169       (when (prog1
5170                 (and fun
5171                      (setq gnus-newsgroup-charset
5172                            (or (cdr (assq
5173                                      arg
5174                                      gnus-summary-show-article-charset-alist))
5175                                (mm-read-coding-system "Charset: "))))
5176               (if (mm-handle-undisplayer handle)
5177                   (mm-remove-part handle)))
5178         (gnus-mime-set-charset-parameters handle)
5179         (when (and (consp (setq form (cdr-safe fun)))
5180                    (setq form (ignore-errors
5181                                 (assq 'gnus-mime-display-alternative form)))
5182                    (setq preferred (caddr form))
5183                    (progn
5184                      (when (eq (car preferred) 'quote)
5185                        (setq preferred (cadr preferred)))
5186                      (not (equal preferred
5187                                  (get-text-property (point) 'gnus-data))))
5188                    (setq parts (get-text-property (point) 'gnus-part))
5189                    (setq parts (cdr (assq parts
5190                                           gnus-article-mime-handle-alist)))
5191                    (equal (mm-handle-media-type parts) "multipart/alternative")
5192                    (setq parts (reverse (cdr parts))))
5193           (setcar (cddr form)
5194                   (list 'quote (or (cadr (member preferred parts))
5195                                    (car parts)))))
5196         (funcall fun handle)))))
5197
5198 (defun gnus-mime-view-part-externally (&optional handle)
5199   "View the MIME part under point with an external viewer."
5200   (interactive)
5201   (gnus-article-check-buffer)
5202   (let* ((handle (or handle (get-text-property (point) 'gnus-data)))
5203          (mm-user-display-methods nil)
5204          (mm-inlined-types nil)
5205          (mail-parse-charset gnus-newsgroup-charset)
5206          (mail-parse-ignored-charsets
5207           (with-current-buffer gnus-summary-buffer
5208             gnus-newsgroup-ignored-charsets))
5209          (type (mm-handle-media-type handle))
5210          (method (mailcap-mime-info type))
5211          (mm-enable-external t))
5212     (if (not (stringp method))
5213         (gnus-mime-view-part-as-type
5214          nil (lambda (types) (stringp (mailcap-mime-info (car types)))))
5215       (when handle
5216         (if (mm-handle-undisplayer handle)
5217             (mm-remove-part handle)
5218           (mm-display-part handle))))))
5219
5220 (defun gnus-mime-view-part-internally (&optional handle)
5221   "View the MIME part under point with an internal viewer.
5222 If no internal viewer is available, use an external viewer."
5223   (interactive)
5224   (gnus-article-check-buffer)
5225   (let* ((handle (or handle (get-text-property (point) 'gnus-data)))
5226          (mm-inlined-types '(".*"))
5227          (mm-inline-large-images t)
5228          (mail-parse-charset gnus-newsgroup-charset)
5229          (mail-parse-ignored-charsets
5230           (with-current-buffer gnus-summary-buffer
5231             gnus-newsgroup-ignored-charsets))
5232          (inhibit-read-only t))
5233     (if (not (mm-inlinable-p handle))
5234         (gnus-mime-view-part-as-type
5235          nil (lambda (types) (mm-inlinable-p handle (car types))))
5236       (when handle
5237         (if (mm-handle-undisplayer handle)
5238             (mm-remove-part handle)
5239           (mm-display-part handle))))))
5240
5241 (defun gnus-mime-action-on-part (&optional action)
5242   "Do something with the MIME attachment at \(point\)."
5243   (interactive
5244    (list (completing-read "Action: " gnus-mime-action-alist nil t)))
5245   (gnus-article-check-buffer)
5246   (let ((action-pair (assoc action gnus-mime-action-alist)))
5247     (if action-pair
5248         (funcall (cdr action-pair)))))
5249
5250 (defun gnus-article-part-wrapper (n function &optional no-handle interactive)
5251   "Call FUNCTION on MIME part N.
5252 Unless NO-HANDLE, call FUNCTION with N-th MIME handle as it's only argument.
5253 If INTERACTIVE, call FUNCTION interactivly."
5254   (let (window frame)
5255     ;; Check whether the article is displayed.
5256     (unless (and (gnus-buffer-live-p gnus-article-buffer)
5257                  (setq window (get-buffer-window gnus-article-buffer t))
5258                  (frame-visible-p (setq frame (window-frame window))))
5259       (error "No article is displayed"))
5260     (with-current-buffer gnus-article-buffer
5261       ;; Check whether the article displays the right contents.
5262       (unless (with-current-buffer gnus-summary-buffer
5263                 (eq gnus-current-article (gnus-summary-article-number)))
5264         (error "You should select the right article first"))
5265       (if n
5266           (setq n (prefix-numeric-value n))
5267         (let ((pt (point)))
5268           (setq n (or (get-text-property pt 'gnus-part)
5269                       (and (not (bobp))
5270                            (get-text-property (1- pt) 'gnus-part))
5271                       (get-text-property (prog2
5272                                              (forward-line 1)
5273                                              (point)
5274                                            (goto-char pt))
5275                                          'gnus-part)
5276                       (get-text-property
5277                        (or (and (setq pt (previous-single-property-change
5278                                           pt 'gnus-part))
5279                                 (1- pt))
5280                            (next-single-property-change (point) 'gnus-part)
5281                            (point))
5282                        'gnus-part)
5283                       1))))
5284       ;; Check whether the specified part exists.
5285       (when (> n (length gnus-article-mime-handle-alist))
5286         (error "No such part")))
5287     (unless
5288         (progn
5289           ;; To select the window is needed so that the cursor
5290           ;; might be visible on the MIME button.
5291           (select-window (prog1
5292                              window
5293                            (setq window (selected-window))
5294                            ;; Article may be displayed in the other frame.
5295                            (gnus-select-frame-set-input-focus
5296                             (prog1
5297                                 frame
5298                               (setq frame (selected-frame))))))
5299           (when (gnus-article-goto-part n)
5300             ;; We point the cursor and the arrow at the MIME button
5301             ;; when the `function' prompt the user for something.
5302             (let ((cursor-in-non-selected-windows t)
5303                   (overlay-arrow-string "=>")
5304                   (overlay-arrow-position (point-marker)))
5305               (unwind-protect
5306                   (cond
5307                    ((and no-handle interactive)
5308                     (call-interactively function))
5309                    (no-handle
5310                     (funcall function))
5311                    (interactive
5312                     (call-interactively
5313                      function
5314                      (cdr (assq n gnus-article-mime-handle-alist))))
5315                    (t
5316                     (funcall function
5317                              (cdr (assq n gnus-article-mime-handle-alist)))))
5318                 (set-marker overlay-arrow-position nil)
5319                 (unless gnus-auto-select-part
5320                   (gnus-select-frame-set-input-focus frame)
5321                   (select-window window))))
5322             t))
5323       (if gnus-inhibit-mime-unbuttonizing
5324           ;; This is the default though the program shouldn't reach here.
5325           (error "No such part")
5326         ;; The part which doesn't have the MIME button is selected.
5327         ;; So, we display all the buttons and redo it.
5328         (let ((gnus-inhibit-mime-unbuttonizing t))
5329           (gnus-summary-show-article)
5330           (gnus-article-part-wrapper n function no-handle))))))
5331
5332 (defun gnus-article-pipe-part (n)
5333   "Pipe MIME part N, which is the numerical prefix."
5334   (interactive "P")
5335   (gnus-article-part-wrapper n 'mm-pipe-part))
5336
5337 (defun gnus-article-save-part (n)
5338   "Save MIME part N, which is the numerical prefix."
5339   (interactive "P")
5340   (gnus-article-part-wrapper n 'mm-save-part))
5341
5342 (defun gnus-article-interactively-view-part (n)
5343   "View MIME part N interactively, which is the numerical prefix."
5344   (interactive "P")
5345   (gnus-article-part-wrapper n 'mm-interactively-view-part))
5346
5347 (defun gnus-article-copy-part (n)
5348   "Copy MIME part N, which is the numerical prefix."
5349   (interactive "P")
5350   (gnus-article-part-wrapper n 'gnus-mime-copy-part))
5351
5352 (defun gnus-article-view-part-as-charset (n)
5353   "View MIME part N using a specified charset.
5354 N is the numerical prefix."
5355   (interactive "P")
5356   (gnus-article-part-wrapper n 'gnus-mime-view-part-as-charset))
5357
5358 (defun gnus-article-view-part-externally (n)
5359   "View MIME part N externally, which is the numerical prefix."
5360   (interactive "P")
5361   (gnus-article-part-wrapper n 'gnus-mime-view-part-externally))
5362
5363 (defun gnus-article-inline-part (n)
5364   "Inline MIME part N, which is the numerical prefix."
5365   (interactive "P")
5366   (gnus-article-part-wrapper n 'gnus-mime-inline-part))
5367
5368 (defun gnus-article-save-part-and-strip (n)
5369   "Save MIME part N and replace it with an external body.
5370 N is the numerical prefix."
5371   (interactive "P")
5372   (gnus-article-part-wrapper n 'gnus-mime-save-part-and-strip t))
5373
5374 (defun gnus-article-replace-part (n)
5375   "Replace MIME part N with an external body.
5376 N is the numerical prefix."
5377   (interactive "P")
5378   (gnus-article-part-wrapper n 'gnus-mime-replace-part t t))
5379
5380 (defun gnus-article-delete-part (n)
5381   "Delete MIME part N and add some information about the removed part.
5382 N is the numerical prefix."
5383   (interactive "P")
5384   (gnus-article-part-wrapper n 'gnus-mime-delete-part t))
5385
5386 (defun gnus-article-view-part-as-type (n)
5387   "Choose a MIME media type, and view part N as such.
5388 N is the numerical prefix."
5389   (interactive "P")
5390   (gnus-article-part-wrapper n 'gnus-mime-view-part-as-type t))
5391
5392 (defun gnus-article-mime-match-handle-first (condition)
5393   (if condition
5394       (let (n)
5395         (dolist (ihandle gnus-article-mime-handle-alist)
5396           (if (and (cond
5397                     ((functionp condition)
5398                      (funcall condition (cdr ihandle)))
5399                     ((eq condition 'undisplayed)
5400                      (not (or (mm-handle-undisplayer (cdr ihandle))
5401                               (equal (mm-handle-media-type (cdr ihandle))
5402                                      "multipart/alternative"))))
5403                     ((eq condition 'undisplayed-alternative)
5404                      (not (mm-handle-undisplayer (cdr ihandle))))
5405                     (t t))
5406                    (gnus-article-goto-part (car ihandle))
5407                    (or (not n) (< (car ihandle) n)))
5408               (setq n (car ihandle))))
5409         (or n 1))
5410     1))
5411
5412 (defun gnus-article-view-part (&optional n)
5413   "View MIME part N, which is the numerical prefix."
5414   (interactive "P")
5415   (with-current-buffer gnus-article-buffer
5416     (or (numberp n) (setq n (gnus-article-mime-match-handle-first
5417                              gnus-article-mime-match-handle-function)))
5418     (when (> n (length gnus-article-mime-handle-alist))
5419       (error "No such part"))
5420     (let ((handle (cdr (assq n gnus-article-mime-handle-alist))))
5421       (when (gnus-article-goto-part n)
5422         (if (equal (car handle) "multipart/alternative")
5423             (gnus-article-press-button)
5424           (when (eq (gnus-mm-display-part handle) 'internal)
5425             (gnus-set-window-start)))))))
5426
5427 (defsubst gnus-article-mime-total-parts ()
5428   (if (bufferp (car gnus-article-mime-handles))
5429       1 ;; single part
5430     (1- (length gnus-article-mime-handles))))
5431
5432 (defun gnus-mm-display-part (handle)
5433   "Display HANDLE and fix MIME button."
5434   (let ((id (get-text-property (point) 'gnus-part))
5435         (point (point))
5436         (inhibit-read-only t))
5437     (forward-line 1)
5438     (prog1
5439         (let ((window (selected-window))
5440               (mail-parse-charset gnus-newsgroup-charset)
5441               (mail-parse-ignored-charsets
5442                (if (gnus-buffer-live-p gnus-summary-buffer)
5443                    (with-current-buffer gnus-summary-buffer
5444                      gnus-newsgroup-ignored-charsets)
5445                  nil)))
5446           (save-excursion
5447             (unwind-protect
5448                 (let ((win (gnus-get-buffer-window (current-buffer) t))
5449                       (beg (point)))
5450                   (when win
5451                     (select-window win))
5452                   (goto-char point)
5453                   (forward-line)
5454                   (if (mm-handle-displayed-p handle)
5455                       ;; This will remove the part.
5456                       (mm-display-part handle)
5457                     (save-restriction
5458                       (narrow-to-region (point)
5459                                         (if (eobp) (point) (1+ (point))))
5460                       (mm-display-part handle)
5461                       ;; We narrow to the part itself and
5462                       ;; then call the treatment functions.
5463                       (goto-char (point-min))
5464                       (forward-line 1)
5465                       (narrow-to-region (point) (point-max))
5466                       (gnus-treat-article
5467                        nil id
5468                        (gnus-article-mime-total-parts)
5469                        (mm-handle-media-type handle)))))
5470               (if (window-live-p window)
5471                   (select-window window)))))
5472       (goto-char point)
5473       (gnus-delete-line)
5474       (gnus-insert-mime-button
5475        handle id (list (mm-handle-displayed-p handle)))
5476       (goto-char point))))
5477
5478 (defun gnus-article-goto-part (n)
5479   "Go to MIME part N."
5480   (gnus-goto-char (text-property-any (point-min) (point-max) 'gnus-part n)))
5481
5482 (defun gnus-insert-mime-button (handle gnus-tmp-id &optional displayed)
5483   (let ((gnus-tmp-name
5484          (or (mail-content-type-get (mm-handle-type handle) 'name)
5485              (mail-content-type-get (mm-handle-disposition handle) 'filename)
5486              (mail-content-type-get (mm-handle-type handle) 'url)
5487              ""))
5488         (gnus-tmp-type (mm-handle-media-type handle))
5489         (gnus-tmp-description (or (mm-handle-description handle) ""))
5490         (gnus-tmp-dots
5491          (if (if displayed (car displayed)
5492                (mm-handle-displayed-p handle))
5493              "" "..."))
5494         (gnus-tmp-length (with-current-buffer (mm-handle-buffer handle)
5495                            (buffer-size)))
5496         gnus-tmp-type-long b e)
5497     (when (string-match ".*/" gnus-tmp-name)
5498       (setq gnus-tmp-name (replace-match "" t t gnus-tmp-name)))
5499     (setq gnus-tmp-type-long (concat gnus-tmp-type
5500                                      (and (not (equal gnus-tmp-name ""))
5501                                           (concat "; " gnus-tmp-name))))
5502     (unless (equal gnus-tmp-description "")
5503       (setq gnus-tmp-type-long (concat " --- " gnus-tmp-type-long)))
5504     (unless (bolp)
5505       (insert "\n"))
5506     (setq b (point))
5507     (gnus-eval-format
5508      gnus-mime-button-line-format gnus-mime-button-line-format-alist
5509      `(keymap ,gnus-mime-button-map
5510               gnus-callback gnus-mm-display-part
5511               gnus-part ,gnus-tmp-id
5512               article-type annotation
5513               gnus-data ,handle))
5514     (setq e (if (bolp)
5515                 ;; Exclude a newline.
5516                 (1- (point))
5517               (point)))
5518     (when gnus-article-button-face
5519       (gnus-overlay-put (gnus-make-overlay b e nil t)
5520                         'face gnus-article-button-face))
5521     (widget-convert-button
5522      'link b e
5523      :mime-handle handle
5524      :action 'gnus-widget-press-button
5525      :button-keymap gnus-mime-button-map
5526      :help-echo
5527      (lambda (widget/window &optional overlay pos)
5528        ;; Needed to properly clear the message due to a bug in
5529        ;; wid-edit (XEmacs only).
5530        (if (boundp 'help-echo-owns-message)
5531            (setq help-echo-owns-message t))
5532        (format
5533         "%S: %s the MIME part; %S: more options"
5534         (aref gnus-mouse-2 0)
5535         ;; XEmacs will get a single widget arg; Emacs 21 will get
5536         ;; window, overlay, position.
5537         (if (mm-handle-displayed-p
5538              (if overlay
5539                  (with-current-buffer (gnus-overlay-buffer overlay)
5540                    (widget-get (widget-at (gnus-overlay-start overlay))
5541                                :mime-handle))
5542                (widget-get widget/window :mime-handle)))
5543             "hide" "show")
5544         (aref gnus-down-mouse-3 0))))))
5545
5546 (defun gnus-widget-press-button (elems el)
5547   (goto-char (widget-get elems :from))
5548   (gnus-article-press-button))
5549
5550 (defvar gnus-displaying-mime nil)
5551
5552 (defun gnus-display-mime (&optional ihandles)
5553   "Display the MIME parts."
5554   (save-excursion
5555     (save-selected-window
5556       (let ((window (get-buffer-window gnus-article-buffer))
5557             (point (point)))
5558         (when window
5559           (select-window window)
5560           ;; We have to do this since selecting the window
5561           ;; may change the point.  So we set the window point.
5562           (set-window-point window point)))
5563       (let ((handles ihandles)
5564             (inhibit-read-only t)
5565             handle)
5566         (cond (handles)
5567               ((setq handles (mm-dissect-buffer nil gnus-article-loose-mime))
5568                (when gnus-article-emulate-mime
5569                  (mm-uu-dissect-text-parts handles)))
5570               (gnus-article-emulate-mime
5571                (setq handles (mm-uu-dissect))))
5572         (when (and (not ihandles)
5573                    (not gnus-displaying-mime))
5574           ;; Top-level call; we clean up.
5575           (when gnus-article-mime-handles
5576             (mm-destroy-parts gnus-article-mime-handles)
5577             (setq gnus-article-mime-handle-alist nil));; A trick.
5578           (setq gnus-article-mime-handles handles)
5579           ;; We allow users to glean info from the handles.
5580           (when gnus-article-mime-part-function
5581             (gnus-mime-part-function handles)))
5582         (if (and handles
5583                  (or (not (stringp (car handles)))
5584                      (cdr handles)))
5585             (progn
5586               (when (and (not ihandles)
5587                          (not gnus-displaying-mime))
5588                 ;; Clean up for mime parts.
5589                 (article-goto-body)
5590                 (delete-region (point) (point-max)))
5591               (let ((gnus-displaying-mime t))
5592                 (gnus-mime-display-part handles)))
5593           (save-restriction
5594             (article-goto-body)
5595             (narrow-to-region (point) (point-max))
5596             (gnus-treat-article nil 1 1)
5597             (widen)))
5598         (unless ihandles
5599           ;; Highlight the headers.
5600           (save-excursion
5601             (save-restriction
5602               (article-goto-body)
5603               (narrow-to-region (point-min) (point))
5604               (gnus-article-save-original-date
5605                (gnus-treat-article 'head)))))))
5606     ;; Cope with broken MIME messages.
5607     (goto-char (point-max))
5608     (unless (bolp)
5609       (insert "\n"))))
5610
5611 (defcustom gnus-mime-display-multipart-as-mixed nil
5612   "Display \"multipart\" parts as  \"multipart/mixed\".
5613
5614 If t, it overrides nil values of
5615 `gnus-mime-display-multipart-alternative-as-mixed' and
5616 `gnus-mime-display-multipart-related-as-mixed'."
5617   :group 'gnus-article-mime
5618   :type 'boolean)
5619
5620 (defcustom gnus-mime-display-multipart-alternative-as-mixed nil
5621   "Display \"multipart/alternative\" parts as  \"multipart/mixed\"."
5622   :version "22.1"
5623   :group 'gnus-article-mime
5624   :type 'boolean)
5625
5626 (defcustom gnus-mime-display-multipart-related-as-mixed nil
5627   "Display \"multipart/related\" parts as  \"multipart/mixed\".
5628
5629 If displaying \"text/html\" is discouraged \(see
5630 `mm-discouraged-alternatives'\) images or other material inside a
5631 \"multipart/related\" part might be overlooked when this variable is nil."
5632   :version "22.1"
5633   :group 'gnus-article-mime
5634   :type 'boolean)
5635
5636 (defun gnus-mime-display-part (handle)
5637   (cond
5638    ;; Maybe a broken MIME message.
5639    ((null handle))
5640    ;; Single part.
5641    ((not (stringp (car handle)))
5642     (gnus-mime-display-single handle))
5643    ;; User-defined multipart
5644    ((cdr (assoc (car handle) gnus-mime-multipart-functions))
5645     (funcall (cdr (assoc (car handle) gnus-mime-multipart-functions))
5646              handle))
5647    ;; multipart/alternative
5648    ((and (equal (car handle) "multipart/alternative")
5649          (not (or gnus-mime-display-multipart-as-mixed
5650                   gnus-mime-display-multipart-alternative-as-mixed)))
5651     (let ((id (1+ (length gnus-article-mime-handle-alist))))
5652       (push (cons id handle) gnus-article-mime-handle-alist)
5653       (gnus-mime-display-alternative (cdr handle) nil nil id)))
5654    ;; multipart/related
5655    ((and (equal (car handle) "multipart/related")
5656          (not (or gnus-mime-display-multipart-as-mixed
5657                   gnus-mime-display-multipart-related-as-mixed)))
5658     ;;;!!!We should find the start part, but we just default
5659     ;;;!!!to the first part.
5660     ;;(gnus-mime-display-part (cadr handle))
5661     ;;;!!! Most multipart/related is an HTML message plus images.
5662     ;;;!!! Unfortunately we are unable to let W3 display those
5663     ;;;!!! included images, so we just display it as a mixed multipart.
5664     ;;(gnus-mime-display-mixed (cdr handle))
5665     ;;;!!! No, w3 can display everything just fine.
5666     (gnus-mime-display-part (cadr handle)))
5667    ((equal (car handle) "multipart/signed")
5668     (gnus-add-wash-type 'signed)
5669     (gnus-mime-display-security handle))
5670    ((equal (car handle) "multipart/encrypted")
5671     (gnus-add-wash-type 'encrypted)
5672     (gnus-mime-display-security handle))
5673    ;; Other multiparts are handled like multipart/mixed.
5674    (t
5675     (gnus-mime-display-mixed (cdr handle)))))
5676
5677 (defun gnus-mime-part-function (handles)
5678   (if (stringp (car handles))
5679       (mapcar 'gnus-mime-part-function (cdr handles))
5680     (funcall gnus-article-mime-part-function handles)))
5681
5682 (defun gnus-mime-display-mixed (handles)
5683   (mapcar 'gnus-mime-display-part handles))
5684
5685 (defun gnus-mime-display-single (handle)
5686   (let ((type (mm-handle-media-type handle))
5687         (ignored gnus-ignored-mime-types)
5688         (not-attachment t)
5689         (move nil)
5690         display text)
5691     (catch 'ignored
5692       (progn
5693         (while ignored
5694           (when (string-match (pop ignored) type)
5695             (throw 'ignored nil)))
5696         (if (and (setq not-attachment
5697                        (and (not (mm-inline-override-p handle))
5698                             (or (not (mm-handle-disposition handle))
5699                                 (equal (car (mm-handle-disposition handle))
5700                                        "inline")
5701                                 (mm-attachment-override-p handle))))
5702                  (mm-automatic-display-p handle)
5703                  (or (and
5704                       (mm-inlinable-p handle)
5705                       (mm-inlined-p handle))
5706                      (mm-automatic-external-display-p type)))
5707             (setq display t)
5708           (when (equal (mm-handle-media-supertype handle) "text")
5709             (setq text t)))
5710         (let ((id (1+ (length gnus-article-mime-handle-alist)))
5711               beg)
5712           (push (cons id handle) gnus-article-mime-handle-alist)
5713           (when (and display
5714                      (equal (mm-handle-media-supertype handle) "message"))
5715             (insert-char
5716              ?\n
5717              (cond ((not (bolp)) 2)
5718                    ((or (bobp) (eq (char-before (1- (point))) ?\n)) 0)
5719                    (t 1))))
5720           (when (or (not display)
5721                     (not (gnus-unbuttonized-mime-type-p type)))
5722             (gnus-insert-mime-button
5723              handle id (list (or display (and not-attachment text))))
5724             (gnus-article-insert-newline)
5725             ;; Remember modify the number of forward lines.
5726             (setq move t))
5727           (setq beg (point))
5728           (cond
5729            (display
5730             (when move
5731               (forward-line -1)
5732               (setq beg (point)))
5733             (let ((mail-parse-charset gnus-newsgroup-charset)
5734                   (mail-parse-ignored-charsets
5735                    (save-excursion (condition-case ()
5736                                        (set-buffer gnus-summary-buffer)
5737                                      (error))
5738                                    gnus-newsgroup-ignored-charsets)))
5739               (mm-display-part handle t))
5740             (goto-char (point-max)))
5741            ((and text not-attachment)
5742             (when move
5743               (forward-line -1)
5744               (setq beg (point)))
5745             (gnus-article-insert-newline)
5746             (mm-insert-inline
5747              handle
5748              (let ((charset (or (mail-content-type-get (mm-handle-type handle)
5749                                                        'charset)
5750                                 (and (equal type "text/calendar") 'utf-8))))
5751                (cond ((not charset)
5752                       (mm-string-as-multibyte (mm-get-part handle)))
5753                      ((eq charset 'gnus-decoded)
5754                       (with-current-buffer (mm-handle-buffer handle)
5755                         (buffer-string)))
5756                      (t
5757                       (mm-decode-string (mm-get-part handle) charset)))))
5758             (goto-char (point-max))))
5759           ;; Do highlighting.
5760           (save-excursion
5761             (save-restriction
5762               (narrow-to-region beg (point))
5763               (if (eq handle gnus-article-mime-handles)
5764                   ;; The format=flowed case.
5765                   (gnus-treat-article nil 1 1 (mm-handle-media-type handle))
5766                 ;; Don't count signature parts that are never displayed.
5767                 ;; The part number should be re-calculated supposing this
5768                 ;; might be a message/rfc822 part.
5769                 (let (handles)
5770                   (dolist (part gnus-article-mime-handles)
5771                     (unless (or (stringp part)
5772                                 (equal (car (mm-handle-type part))
5773                                        "application/pgp-signature"))
5774                       (push part handles)))
5775                   (gnus-treat-article
5776                    nil (length (memq handle handles)) (length handles)
5777                    (mm-handle-media-type handle)))))))))))
5778
5779 (defun gnus-unbuttonized-mime-type-p (type)
5780   "Say whether TYPE is to be unbuttonized."
5781   (unless gnus-inhibit-mime-unbuttonizing
5782     (when (catch 'found
5783             (let ((types gnus-unbuttonized-mime-types))
5784               (while types
5785                 (when (string-match (pop types) type)
5786                   (throw 'found t)))))
5787       (not (catch 'found
5788              (let ((types gnus-buttonized-mime-types))
5789                (while types
5790                  (when (string-match (pop types) type)
5791                    (throw 'found t)))))))))
5792
5793 (defun gnus-article-insert-newline ()
5794   "Insert a newline, but mark it as undeletable."
5795   (gnus-put-text-property
5796    (point) (progn (insert "\n") (point)) 'gnus-undeletable t))
5797
5798 (defun gnus-mime-display-alternative (handles &optional preferred ibegend id)
5799   (let* ((preferred (or preferred (mm-preferred-alternative handles)))
5800          (ihandles handles)
5801          (point (point))
5802          handle (inhibit-read-only t) from props begend not-pref)
5803     (save-window-excursion
5804       (save-restriction
5805         (when ibegend
5806           (narrow-to-region (car ibegend)
5807                             (or (cdr ibegend)
5808                                 (progn
5809                                   (goto-char (car ibegend))
5810                                   (forward-line 2)
5811                                   (point))))
5812           (delete-region (point-min) (point-max))
5813           (mm-remove-parts handles))
5814         (setq begend (list (point-marker)))
5815         ;; Do the toggle.
5816         (unless (setq not-pref (cadr (member preferred ihandles)))
5817           (setq not-pref (car ihandles)))
5818         (when (or ibegend
5819                   (not preferred)
5820                   (not (gnus-unbuttonized-mime-type-p
5821                         "multipart/alternative")))
5822           (gnus-add-text-properties
5823            (setq from (point))
5824            (progn
5825              (insert (format "%d.  " id))
5826              (point))
5827            `(gnus-callback
5828              (lambda (handles)
5829                (unless ,(not ibegend)
5830                  (setq gnus-article-mime-handle-alist
5831                        ',gnus-article-mime-handle-alist))
5832                (gnus-mime-display-alternative
5833                 ',ihandles ',not-pref ',begend ,id))
5834              keymap ,gnus-mime-button-map
5835              ,gnus-mouse-face-prop ,gnus-article-mouse-face
5836              face ,gnus-article-button-face
5837              gnus-part ,id
5838              article-type multipart))
5839           (widget-convert-button 'link from (point)
5840                                  :action 'gnus-widget-press-button
5841                                  :button-keymap gnus-widget-button-keymap)
5842           ;; Do the handles
5843           (while (setq handle (pop handles))
5844             (gnus-add-text-properties
5845              (setq from (point))
5846              (progn
5847                (insert (format "(%c) %-18s"
5848                                (if (equal handle preferred) ?* ? )
5849                                (mm-handle-media-type handle)))
5850                (point))
5851              `(gnus-callback
5852                (lambda (handles)
5853                  (unless ,(not ibegend)
5854                    (setq gnus-article-mime-handle-alist
5855                          ',gnus-article-mime-handle-alist))
5856                  (gnus-mime-display-alternative
5857                   ',ihandles ',handle ',begend ,id))
5858                keymap ,gnus-mime-button-map
5859                ,gnus-mouse-face-prop ,gnus-article-mouse-face
5860                face ,gnus-article-button-face
5861                gnus-part ,id
5862                gnus-data ,handle))
5863             (widget-convert-button 'link from (point)
5864                                    :action 'gnus-widget-press-button
5865                                    :button-keymap gnus-widget-button-keymap)
5866             (insert "  "))
5867           (insert "\n\n"))
5868         (when preferred
5869           (if (stringp (car preferred))
5870               (gnus-display-mime preferred)
5871             (let ((mail-parse-charset gnus-newsgroup-charset)
5872                   (mail-parse-ignored-charsets
5873                    (with-current-buffer gnus-summary-buffer
5874                      gnus-newsgroup-ignored-charsets)))
5875               (mm-display-part preferred)
5876               ;; Do highlighting.
5877               (save-excursion
5878                 (save-restriction
5879                   (narrow-to-region (car begend) (point-max))
5880                   (gnus-treat-article
5881                    nil (length gnus-article-mime-handle-alist)
5882                    (gnus-article-mime-total-parts)
5883                    (mm-handle-media-type handle))))))
5884           (goto-char (point-max))
5885           (setcdr begend (point-marker)))))
5886     (when ibegend
5887       (goto-char point))))
5888
5889 (defconst gnus-article-wash-status-strings
5890   (let ((alist '((cite "c" "Possible hidden citation text"
5891                        " " "All citation text visible")
5892                  (headers "h" "Hidden headers"
5893                           " " "All headers visible.")
5894                  (pgp "p" "Encrypted or signed message status hidden"
5895                       " " "No hidden encryption nor digital signature status")
5896                  (signature "s" "Signature has been hidden"
5897                             " " "Signature is visible")
5898                  (overstrike "o" "Overstrike (^H) characters applied"
5899                              " " "No overstrike characters applied")
5900                  (emphasis "e" "/*_Emphasis_*/ characters applied"
5901                            " " "No /*_emphasis_*/ characters applied")))
5902         result)
5903     (dolist (entry alist result)
5904       (let ((key (nth 0 entry))
5905             (on (copy-sequence (nth 1 entry)))
5906             (on-help (nth 2 entry))
5907             (off (copy-sequence (nth 3 entry)))
5908             (off-help (nth 4 entry)))
5909         (put-text-property 0 1 'help-echo on-help on)
5910         (put-text-property 0 1 'help-echo off-help off)
5911         (push (list key on off) result))))
5912   "Alist of strings describing wash status in the mode line.
5913 Each entry has the form (KEY ON OF), where the KEY is a symbol
5914 representing the particular washing function, ON is the string to use
5915 in the article mode line when the washing function is active, and OFF
5916 is the string to use when it is inactive.")
5917
5918 (defun gnus-article-wash-status-entry (key value)
5919   (let ((entry (assoc key gnus-article-wash-status-strings)))
5920     (if value (nth 1 entry) (nth 2 entry))))
5921
5922 (defun gnus-article-wash-status ()
5923   "Return a string which display status of article washing."
5924   (with-current-buffer gnus-article-buffer
5925     (let ((cite (memq 'cite gnus-article-wash-types))
5926           (headers (memq 'headers gnus-article-wash-types))
5927           (boring (memq 'boring-headers gnus-article-wash-types))
5928           (pgp (memq 'pgp gnus-article-wash-types))
5929           (pem (memq 'pem gnus-article-wash-types))
5930           (signed (memq 'signed gnus-article-wash-types))
5931           (encrypted (memq 'encrypted gnus-article-wash-types))
5932           (signature (memq 'signature gnus-article-wash-types))
5933           (overstrike (memq 'overstrike gnus-article-wash-types))
5934           (emphasis (memq 'emphasis gnus-article-wash-types)))
5935       (concat
5936        (gnus-article-wash-status-entry 'cite cite)
5937        (gnus-article-wash-status-entry 'headers (or headers boring))
5938        (gnus-article-wash-status-entry 'pgp (or pgp pem signed encrypted))
5939        (gnus-article-wash-status-entry 'signature signature)
5940        (gnus-article-wash-status-entry 'overstrike overstrike)
5941        (gnus-article-wash-status-entry 'emphasis emphasis)))))
5942
5943 (defun gnus-add-wash-type (type)
5944   "Add a washing of TYPE to the current status."
5945   (add-to-list 'gnus-article-wash-types type))
5946
5947 (defun gnus-delete-wash-type (type)
5948   "Add a washing of TYPE to the current status."
5949   (setq gnus-article-wash-types (delq type gnus-article-wash-types)))
5950
5951 (defun gnus-add-image (category image)
5952   "Add IMAGE of CATEGORY to the list of displayed images."
5953   (let ((entry (assq category gnus-article-image-alist)))
5954     (unless entry
5955       (setq entry (list category))
5956       (push entry gnus-article-image-alist))
5957     (nconc entry (list image))))
5958
5959 (defun gnus-delete-images (category)
5960   "Delete all images in CATEGORY."
5961   (let ((entry (assq category gnus-article-image-alist)))
5962     (dolist (image (cdr entry))
5963       (gnus-remove-image image category))
5964     (setq gnus-article-image-alist (delq entry gnus-article-image-alist))
5965     (gnus-delete-wash-type category)))
5966
5967 (defalias 'gnus-article-hide-headers-if-wanted 'gnus-article-maybe-hide-headers)
5968
5969 (defun gnus-article-maybe-hide-headers ()
5970   "Hide unwanted headers if `gnus-have-all-headers' is nil.
5971 Provided for backwards compatibility."
5972   (when (and (or (not (gnus-buffer-live-p gnus-summary-buffer))
5973                  (not (with-current-buffer gnus-summary-buffer
5974                         gnus-have-all-headers)))
5975              (not gnus-inhibit-hiding))
5976     (gnus-article-hide-headers)))
5977
5978 ;;; Article savers.
5979
5980 (defun gnus-output-to-file (file-name)
5981   "Append the current article to a file named FILE-NAME.
5982 If `gnus-article-save-coding-system' is non-nil, it is used to encode
5983 text and used as the value of the coding cookie which is added to the
5984 top of a file.  Otherwise, this function saves a raw article without
5985 the coding cookie."
5986   (let* ((artbuf (current-buffer))
5987          (file-name-coding-system nnmail-pathname-coding-system)
5988          (coding gnus-article-save-coding-system)
5989          (coding-system-for-read (if coding
5990                                      nil ;; Rely on the coding cookie.
5991                                    mm-text-coding-system))
5992          (coding-system-for-write (or coding
5993                                       mm-text-coding-system-for-write
5994                                       mm-text-coding-system))
5995          (exists (file-exists-p file-name)))
5996     (with-temp-buffer
5997       (when exists
5998         (insert-file-contents file-name)
5999         (goto-char (point-min))
6000         ;; Remove the existing coding cookie.
6001         (when (looking-at "X-Gnus-Coding-System: .+\n\n")
6002           (delete-region (match-beginning 0) (match-end 0))))
6003       (goto-char (point-max))
6004       (insert-buffer-substring artbuf)
6005       ;; Append newline at end of the buffer as separator, and then
6006       ;; save it to file.
6007       (goto-char (point-max))
6008       (insert "\n")
6009       (when coding
6010         ;; If the coding system is not suitable to encode the text,
6011         ;; ask a user for a proper one.
6012         (when (fboundp 'select-safe-coding-system)
6013           (setq coding (coding-system-base
6014                         (save-window-excursion
6015                           (select-safe-coding-system (point-min) (point-max)
6016                                                      coding))))
6017           (setq coding-system-for-write
6018                 (or (cdr (assq coding '((mule-utf-8 . utf-8))))
6019                     coding)))
6020         (goto-char (point-min))
6021         ;; Add the coding cookie.
6022         (insert (format "X-Gnus-Coding-System: -*- coding: %s; -*-\n\n"
6023                         coding-system-for-write)))
6024       (if exists
6025           (progn
6026             (write-region (point-min) (point-max) file-name nil 'no-message)
6027             (message "Appended to %s" file-name))
6028         (write-region (point-min) (point-max) file-name))))
6029   t)
6030
6031 (defun gnus-narrow-to-page (&optional arg)
6032   "Narrow the article buffer to a page.
6033 If given a numerical ARG, move forward ARG pages."
6034   (interactive "P")
6035   (setq arg (if arg (prefix-numeric-value arg) 0))
6036   (with-current-buffer gnus-article-buffer
6037     (widen)
6038     ;; Remove any old next/prev buttons.
6039     (when (gnus-visual-p 'page-marker)
6040       (let ((inhibit-read-only t))
6041         (gnus-remove-text-with-property 'gnus-prev)
6042         (gnus-remove-text-with-property 'gnus-next)))
6043     (let (st nd pt)
6044       (when (save-excursion
6045               (cond ((< arg 0)
6046                      (if (re-search-backward page-delimiter nil 'move (abs arg))
6047                          (prog1
6048                              (setq nd (match-beginning 0)
6049                                    pt nd)
6050                            (when (re-search-backward page-delimiter nil t)
6051                              (setq st (match-end 0))))
6052                        (when (re-search-forward page-delimiter nil t)
6053                          (setq nd (match-beginning 0)
6054                                pt (point-min)))))
6055                     ((> arg 0)
6056                      (if (re-search-forward page-delimiter nil 'move arg)
6057                          (prog1
6058                              (setq st (match-end 0)
6059                                    pt st)
6060                            (when (re-search-forward page-delimiter nil t)
6061                              (setq nd (match-beginning 0))))
6062                        (when (re-search-backward page-delimiter nil t)
6063                          (setq st (match-end 0)
6064                                pt (point-max)))))
6065                     (t
6066                      (when (re-search-backward page-delimiter nil t)
6067                        (goto-char (setq st (match-end 0))))
6068                      (when (re-search-forward page-delimiter nil t)
6069                        (setq nd (match-beginning 0)))
6070                      (or st nd))))
6071         (setq gnus-page-broken t)
6072         (when pt (goto-char pt))
6073         (narrow-to-region (or st (point-min)) (or nd (point-max)))
6074         (when (gnus-visual-p 'page-marker)
6075           (save-excursion
6076             (when nd
6077               (goto-char nd)
6078               (gnus-insert-next-page-button))
6079             (when st
6080               (goto-char st)
6081               (gnus-insert-prev-page-button))))))))
6082
6083 ;; Article mode commands
6084
6085 (defun gnus-article-goto-next-page ()
6086   "Show the next page of the article."
6087   (interactive)
6088   (when (gnus-article-next-page)
6089     (goto-char (point-min))
6090     (gnus-article-read-summary-keys nil (gnus-character-to-event ?n))))
6091
6092
6093 (defun gnus-article-goto-prev-page ()
6094   "Show the previous page of the article."
6095   (interactive)
6096   (if (save-restriction (widen) (bobp)) ;; Real beginning-of-buffer?
6097       (gnus-article-read-summary-keys nil (gnus-character-to-event ?p))
6098     (gnus-article-prev-page nil)))
6099
6100 ;; This is cleaner but currently breaks `gnus-pick-mode':
6101 ;;
6102 ;; (defun gnus-article-goto-next-page ()
6103 ;;   "Show the next page of the article."
6104 ;;   (interactive)
6105 ;;   (gnus-eval-in-buffer-window gnus-summary-buffer
6106 ;;     (gnus-summary-next-page)))
6107 ;;
6108 ;; (defun gnus-article-goto-prev-page ()
6109 ;;   "Show the next page of the article."
6110 ;;   (interactive)
6111 ;;   (gnus-eval-in-buffer-window gnus-summary-buffer
6112 ;;     (gnus-summary-prev-page)))
6113
6114 (defun gnus-article-next-page (&optional lines)
6115   "Show the next page of the current article.
6116 If end of article, return non-nil.  Otherwise return nil.
6117 Argument LINES specifies lines to be scrolled up."
6118   (interactive "p")
6119   (move-to-window-line (if (featurep 'xemacs) -1 (- -1 scroll-margin)))
6120   (if (and (not (and gnus-article-over-scroll
6121                      (> (count-lines (window-start) (point-max))
6122                         (if (featurep 'xemacs)
6123                             (or lines (1- (window-height)))
6124                           (+ (or lines (1- (window-height))) scroll-margin)))))
6125            (save-excursion
6126              (end-of-line)
6127              (and (pos-visible-in-window-p)     ;Not continuation line.
6128                   (>= (1+ (point)) (point-max))))) ;Allow for trailing newline.
6129       ;; Nothing in this page.
6130       (if (or (not gnus-page-broken)
6131               (save-excursion
6132                 (save-restriction
6133                   (widen)
6134                   (forward-line)
6135                   (eobp)))) ;Real end-of-buffer?
6136           (progn
6137             (when gnus-article-over-scroll
6138               (gnus-article-next-page-1 lines))
6139             t)                  ;Nothing more.
6140         (gnus-narrow-to-page 1)         ;Go to next page.
6141         nil)
6142     ;; More in this page.
6143     (gnus-article-next-page-1 lines)
6144     nil))
6145
6146 (defmacro gnus-article-beginning-of-window ()
6147   "Move point to the beginning of the window.
6148 In Emacs, the point is placed at the line number which `scroll-margin'
6149 specifies."
6150   (if (featurep 'xemacs)
6151       '(move-to-window-line 0)
6152     '(move-to-window-line
6153       (min (max 0 scroll-margin)
6154            (max 1 (- (window-height)
6155                      (if mode-line-format 1 0)
6156                      (if header-line-format 1 0)
6157                      2))))))
6158
6159 (defun gnus-article-next-page-1 (lines)
6160   (unless (featurep 'xemacs)
6161     ;; Protect against the bug that Emacs 21.x hangs up when scrolling up for
6162     ;; too many number of lines if `scroll-margin' is set as two or greater.
6163     (when (and (numberp lines)
6164                (> lines 0)
6165                (> scroll-margin 0))
6166       (setq lines (min lines
6167                        (max 0 (- (count-lines (window-start) (point-max))
6168                                  scroll-margin))))))
6169   (condition-case ()
6170       (let ((scroll-in-place nil))
6171         (scroll-up lines))
6172     (end-of-buffer
6173      ;; Long lines may cause an end-of-buffer error.
6174      (goto-char (point-max))))
6175   (gnus-article-beginning-of-window))
6176
6177 (defun gnus-article-prev-page (&optional lines)
6178   "Show previous page of current article.
6179 Argument LINES specifies lines to be scrolled down."
6180   (interactive "p")
6181   (move-to-window-line 0)
6182   (if (and gnus-page-broken
6183            (bobp)
6184            (not (save-restriction (widen) (bobp)))) ;Real beginning-of-buffer?
6185       (progn
6186         (gnus-narrow-to-page -1)        ;Go to previous page.
6187         (goto-char (point-max))
6188         (recenter (if gnus-article-over-scroll
6189                       (if lines
6190                           (max (if (featurep 'xemacs)
6191                                    lines
6192                                  (+ lines scroll-margin))
6193                                3)
6194                         (- (window-height) 2))
6195                     -1)))
6196     (prog1
6197         (condition-case ()
6198             (let ((scroll-in-place nil))
6199               (scroll-down lines))
6200           (beginning-of-buffer
6201            (goto-char (point-min))))
6202       (gnus-article-beginning-of-window))))
6203
6204 (defun gnus-article-only-boring-p ()
6205   "Decide whether there is only boring text remaining in the article.
6206 Something \"interesting\" is a word of at least two letters that does
6207 not have a face in `gnus-article-boring-faces'."
6208   (when (and gnus-article-skip-boring
6209              (boundp 'gnus-article-boring-faces)
6210              (symbol-value 'gnus-article-boring-faces))
6211     (save-excursion
6212       (let ((inhibit-point-motion-hooks t))
6213         (catch 'only-boring
6214           (while (re-search-forward "\\b\\w\\w" nil t)
6215             (forward-char -1)
6216             (when (not (gnus-intersection
6217                         (gnus-faces-at (point))
6218                         (symbol-value 'gnus-article-boring-faces)))
6219               (throw 'only-boring nil)))
6220           (throw 'only-boring t))))))
6221
6222 (defun gnus-article-refer-article ()
6223   "Read article specified by message-id around point."
6224   (interactive)
6225   (save-excursion
6226     (re-search-backward "[ \t]\\|^" (point-at-bol) t)
6227     (re-search-forward "<?news:<?\\|<" (point-at-eol) t)
6228     (if (re-search-forward "[^@ ]+@[^ \t>]+" (point-at-eol) t)
6229         (let ((msg-id (concat "<" (match-string 0) ">")))
6230           (set-buffer gnus-summary-buffer)
6231           (gnus-summary-refer-article msg-id))
6232       (error "No references around point"))))
6233
6234 (defun gnus-article-show-summary ()
6235   "Reconfigure windows to show summary buffer."
6236   (interactive)
6237   (if (not (gnus-buffer-live-p gnus-summary-buffer))
6238       (error "There is no summary buffer for this article buffer")
6239     (gnus-article-set-globals)
6240     (gnus-configure-windows 'article)
6241     (gnus-summary-goto-subject gnus-current-article)
6242     (gnus-summary-position-point)))
6243
6244 (defun gnus-article-describe-briefly ()
6245   "Describe article mode commands briefly."
6246   (interactive)
6247   (gnus-message 6 (substitute-command-keys "\\<gnus-article-mode-map>\\[gnus-article-goto-next-page]:Next page   \\[gnus-article-goto-prev-page]:Prev page  \\[gnus-article-show-summary]:Show summary  \\[gnus-info-find-node]:Run Info  \\[gnus-article-describe-briefly]:This help")))
6248
6249 (defun gnus-article-summary-command ()
6250   "Execute the last keystroke in the summary buffer."
6251   (interactive)
6252   (let ((obuf (current-buffer))
6253         (owin (current-window-configuration))
6254         func)
6255     (switch-to-buffer gnus-article-current-summary 'norecord)
6256     (setq func (lookup-key (current-local-map) (this-command-keys)))
6257     (call-interactively func)
6258     (set-buffer obuf)
6259     (set-window-configuration owin)
6260     (set-window-point (get-buffer-window (current-buffer)) (point))))
6261
6262 (defun gnus-article-summary-command-nosave ()
6263   "Execute the last keystroke in the summary buffer."
6264   (interactive)
6265   (let (func)
6266     (pop-to-buffer gnus-article-current-summary)
6267     (setq func (lookup-key (current-local-map) (this-command-keys)))
6268     (call-interactively func)))
6269
6270 (defun gnus-article-check-buffer ()
6271   "Beep if not in an article buffer."
6272   (unless (equal major-mode 'gnus-article-mode)
6273     (error "Command invoked outside of a Gnus article buffer")))
6274
6275 (defun gnus-article-read-summary-keys (&optional arg key not-restore-window)
6276   "Read a summary buffer key sequence and execute it from the article buffer."
6277   (interactive "P")
6278   (gnus-article-check-buffer)
6279   (let ((nosaves
6280          '("q" "Q"  "c" "r" "\C-c\C-f" "m"  "a" "f"
6281            "Zc" "ZC" "ZE" "ZQ" "ZZ" "Zn" "ZR" "ZG" "ZN" "ZP"
6282            "=" "^" "\M-^" "|"))
6283         (nosave-but-article
6284          '("A " "A<" "A>" "AM" "AP" "AR" "AT" "A\C-?" "A\M-\r" "A\r" "Ab" "Ae"
6285            "An" "Ap" [?A (meta return)] [?A delete]))
6286         (nosave-in-article
6287          '("AS" "\C-d"))
6288         (up-to-top
6289          '("n" "Gn" "p" "Gp"))
6290         keys new-sum-point)
6291     (with-current-buffer gnus-article-current-summary
6292       (let (gnus-pick-mode)
6293         (setq unread-command-events (nconc unread-command-events
6294                                            (list (or key last-command-event)))
6295               keys (if (featurep 'xemacs)
6296                        (events-to-keys (read-key-sequence nil t))
6297                      (read-key-sequence nil t)))))
6298
6299     (message "")
6300
6301     (cond
6302      ((eq (aref keys (1- (length keys))) ?\C-h)
6303       (gnus-article-describe-bindings (substring keys 0 -1)))
6304      ((or (member keys nosaves)
6305           (member keys nosave-but-article)
6306           (member keys nosave-in-article))
6307       (let (func)
6308         (save-window-excursion
6309           (pop-to-buffer gnus-article-current-summary)
6310           ;; We disable the pick minor mode commands.
6311           (let (gnus-pick-mode)
6312             (setq func (lookup-key (current-local-map) keys))))
6313         (if (or (not func)
6314                 (numberp func))
6315             (ding)
6316           (unless (member keys nosave-in-article)
6317             (set-buffer gnus-article-current-summary))
6318           (call-interactively func)
6319           (setq new-sum-point (point)))
6320         (when (member keys nosave-but-article)
6321           (pop-to-buffer gnus-article-buffer))))
6322      (t
6323       ;; These commands should restore window configuration.
6324       (let ((obuf (current-buffer))
6325             (owin (current-window-configuration))
6326             win func in-buffer selected new-sum-start new-sum-hscroll err)
6327         (cond (not-restore-window
6328                (pop-to-buffer gnus-article-current-summary)
6329                (setq win (selected-window)))
6330               ((setq win (get-buffer-window gnus-article-current-summary))
6331                (select-window win))
6332               (t
6333                (let ((summary-buffer gnus-article-current-summary))
6334                  (gnus-configure-windows 'article)
6335                  (unless (setq win (get-buffer-window summary-buffer 'visible))
6336                    (let ((gnus-buffer-configuration
6337                           '(article ((vertical 1.0
6338                                                (summary 0.25 point)
6339                                                (article 1.0))))))
6340                      (gnus-configure-windows 'article))
6341                    (setq win (get-buffer-window summary-buffer 'visible)))
6342                  (gnus-select-frame-set-input-focus (window-frame win))
6343                  (select-window win))))
6344         (setq in-buffer (current-buffer))
6345         ;; We disable the pick minor mode commands.
6346         (if (and (setq func (let (gnus-pick-mode)
6347                               (lookup-key (current-local-map) keys)))
6348                  (functionp func)
6349                  (condition-case code
6350                      (progn
6351                        (call-interactively func)
6352                        t)
6353                    (error
6354                     (setq err code)
6355                     nil)))
6356             (progn
6357               (when (eq win (selected-window))
6358                 (setq new-sum-point (point)
6359                       new-sum-start (window-start win)
6360                       new-sum-hscroll (window-hscroll win)))
6361               (when (or (eq in-buffer (current-buffer))
6362                         (when (eq obuf (current-buffer))
6363                           (set-buffer in-buffer)
6364                           t))
6365                 (setq selected (gnus-summary-select-article))
6366                 (set-buffer obuf)
6367                 (unless not-restore-window
6368                   (set-window-configuration owin))
6369                 (when (and (eq selected 'old)
6370                            new-sum-point)
6371                   (set-window-start (get-buffer-window (current-buffer))
6372                                     1)
6373                   (set-window-point (get-buffer-window (current-buffer))
6374                                     (if (article-goto-body)
6375                                         (1- (point))
6376                                       (point))))
6377                 (when (and (not not-restore-window)
6378                            new-sum-point
6379                            (with-current-buffer (window-buffer win)
6380                              (eq major-mode 'gnus-summary-mode)))
6381                   (set-window-point win new-sum-point)
6382                   (set-window-start win new-sum-start)
6383                   (set-window-hscroll win new-sum-hscroll))))
6384           (set-window-configuration owin)
6385           (if err
6386               (signal (car err) (cdr err))
6387             (ding))))))))
6388
6389 (defun gnus-article-read-summary-send-keys ()
6390   (interactive)
6391   (let ((unread-command-events (list (gnus-character-to-event ?S))))
6392     (gnus-article-read-summary-keys)))
6393
6394 (defun gnus-article-describe-key (key)
6395   "Display documentation of the function invoked by KEY.
6396 KEY is a string or a vector."
6397   (interactive (list (let ((cursor-in-echo-area t)) ;; better for XEmacs.
6398                        (read-key-sequence "Describe key: "))))
6399   (gnus-article-check-buffer)
6400   (if (memq (key-binding key t) '(gnus-article-read-summary-keys
6401                                   gnus-article-read-summary-send-keys))
6402       (with-current-buffer gnus-article-current-summary
6403         (setq unread-command-events
6404               (if (featurep 'xemacs)
6405                   (append key nil)
6406                 (mapcar (lambda (x) (if (and (integerp x) (>= x 128))
6407                                         (list 'meta (- x 128))
6408                                       x))
6409                         key)))
6410         (let ((cursor-in-echo-area t)
6411               gnus-pick-mode)
6412           (describe-key (read-key-sequence nil t))))
6413     (describe-key key)))
6414
6415 (defun gnus-article-describe-key-briefly (key &optional insert)
6416   "Display documentation of the function invoked by KEY.
6417 KEY is a string or a vector."
6418   (interactive (list (let ((cursor-in-echo-area t)) ;; better for XEmacs.
6419                        (read-key-sequence "Describe key: "))
6420                      current-prefix-arg))
6421   (gnus-article-check-buffer)
6422   (if (memq (key-binding key t) '(gnus-article-read-summary-keys
6423                                   gnus-article-read-summary-send-keys))
6424       (with-current-buffer gnus-article-current-summary
6425         (setq unread-command-events
6426               (if (featurep 'xemacs)
6427                   (append key nil)
6428                 (mapcar (lambda (x) (if (and (integerp x) (>= x 128))
6429                                         (list 'meta (- x 128))
6430                                       x))
6431                         key)))
6432         (let ((cursor-in-echo-area t)
6433               gnus-pick-mode)
6434           (describe-key-briefly (read-key-sequence nil t) insert)))
6435     (describe-key-briefly key insert)))
6436
6437 ;;`gnus-agent-mode' in gnus-agent.el will define it.
6438 (defvar gnus-agent-summary-mode)
6439 (defvar gnus-draft-mode)
6440
6441 (defun gnus-article-describe-bindings (&optional prefix)
6442   "Show a list of all defined keys, and their definitions.
6443 The optional argument PREFIX, if non-nil, should be a key sequence;
6444 then we display only bindings that start with that prefix."
6445   (interactive)
6446   (gnus-article-check-buffer)
6447   (let ((keymap (copy-keymap gnus-article-mode-map))
6448         (map (copy-keymap gnus-article-send-map))
6449         (sumkeys (where-is-internal 'gnus-article-read-summary-keys))
6450         agent draft)
6451     (define-key keymap "S" map)
6452     (define-key map [t] nil)
6453     (with-current-buffer gnus-article-current-summary
6454       (set-keymap-parent map (key-binding "S"))
6455       (let (key def gnus-pick-mode)
6456         (while sumkeys
6457           (setq key (pop sumkeys))
6458           (cond ((and (vectorp key) (= (length key) 1)
6459                       (consp (setq def (aref key 0)))
6460                       (numberp (car def)) (numberp (cdr def)))
6461                  (when (< (max (car def) (cdr def)) 128)
6462                    (setq sumkeys
6463                          (append (mapcar
6464                                   #'vector
6465                                   (nreverse (gnus-uncompress-range def)))
6466                                  sumkeys))))
6467                 ((setq def (key-binding key))
6468                  (unless (eq def 'undefined)
6469                    (define-key keymap key def))))))
6470       (when (boundp 'gnus-agent-summary-mode)
6471         (setq agent gnus-agent-summary-mode))
6472       (when (boundp 'gnus-draft-mode)
6473         (setq draft gnus-draft-mode)))
6474     (with-temp-buffer
6475       (use-local-map keymap)
6476       (set (make-local-variable 'gnus-agent-summary-mode) agent)
6477       (set (make-local-variable 'gnus-draft-mode) draft)
6478       (describe-bindings prefix))
6479     (let ((item `((lambda (prefix)
6480                     (with-current-buffer ,(current-buffer)
6481                       (gnus-article-describe-bindings prefix)))
6482                   ,prefix)))
6483       (with-current-buffer (if (fboundp 'help-buffer)
6484                                (let (help-xref-following) (help-buffer))
6485                              "*Help*") ;; Emacs 21
6486         (setq help-xref-stack-item item)))))
6487
6488 (defun gnus-article-reply-with-original (&optional wide)
6489   "Start composing a reply mail to the current message.
6490 The text in the region will be yanked.  If the region isn't active,
6491 the entire article will be yanked."
6492   (interactive)
6493   (let ((article (cdr gnus-article-current))
6494         contents)
6495     (if (not (gnus-region-active-p))
6496         (with-current-buffer gnus-summary-buffer
6497           (gnus-summary-reply (list (list article)) wide))
6498       (setq contents (buffer-substring (point) (mark t)))
6499       ;; Deactivate active regions.
6500       (when (and (boundp 'transient-mark-mode)
6501                  transient-mark-mode)
6502         (setq mark-active nil))
6503       (with-current-buffer gnus-summary-buffer
6504         (gnus-summary-reply
6505          (list (list article contents)) wide)))))
6506
6507 (defun gnus-article-wide-reply-with-original ()
6508   "Start composing a wide reply mail to the current message.
6509 The text in the region will be yanked.  If the region isn't active,
6510 the entire article will be yanked."
6511   (interactive)
6512   (gnus-article-reply-with-original t))
6513
6514 (defun gnus-article-followup-with-original ()
6515   "Compose a followup to the current article.
6516 The text in the region will be yanked.  If the region isn't active,
6517 the entire article will be yanked."
6518   (interactive)
6519   (let ((article (cdr gnus-article-current))
6520         contents)
6521       (if (not (gnus-region-active-p))
6522           (with-current-buffer gnus-summary-buffer
6523             (gnus-summary-followup (list (list article))))
6524         (setq contents (buffer-substring (point) (mark t)))
6525         ;; Deactivate active regions.
6526         (when (and (boundp 'transient-mark-mode)
6527                    transient-mark-mode)
6528           (setq mark-active nil))
6529         (with-current-buffer gnus-summary-buffer
6530           (gnus-summary-followup
6531            (list (list article contents)))))))
6532
6533 (defun gnus-article-hide (&optional arg force)
6534   "Hide all the gruft in the current article.
6535 This means that signatures, cited text and (some) headers will be
6536 hidden.
6537 If given a prefix, show the hidden text instead."
6538   (interactive (append (gnus-article-hidden-arg) (list 'force)))
6539   (gnus-article-hide-headers arg)
6540   (gnus-article-hide-list-identifiers arg)
6541   (gnus-article-hide-citation-maybe arg force)
6542   (gnus-article-hide-signature arg))
6543
6544 (defun gnus-article-maybe-highlight ()
6545   "Do some article highlighting if article highlighting is requested."
6546   (when (gnus-visual-p 'article-highlight 'highlight)
6547     (gnus-article-highlight-some)))
6548
6549 (defun gnus-check-group-server ()
6550   ;; Make sure the connection to the server is alive.
6551   (unless (gnus-server-opened
6552            (gnus-find-method-for-group gnus-newsgroup-name))
6553     (gnus-check-server (gnus-find-method-for-group gnus-newsgroup-name))
6554     (gnus-request-group gnus-newsgroup-name t)))
6555
6556 (eval-when-compile
6557   (autoload 'nneething-get-file-name "nneething"))
6558
6559 (defun gnus-request-article-this-buffer (article group)
6560   "Get an article and insert it into this buffer."
6561   (let (do-update-line sparse-header)
6562     (prog1
6563         (save-excursion
6564           (erase-buffer)
6565           (gnus-kill-all-overlays)
6566           (setq group (or group gnus-newsgroup-name))
6567
6568           ;; Using `gnus-request-article' directly will insert the article into
6569           ;; `nntp-server-buffer' - so we'll save some time by not having to
6570           ;; copy it from the server buffer into the article buffer.
6571
6572           ;; We only request an article by message-id when we do not have the
6573           ;; headers for it, so we'll have to get those.
6574           (when (stringp article)
6575             (gnus-read-header article))
6576
6577           ;; If the article number is negative, that means that this article
6578           ;; doesn't belong in this newsgroup (possibly), so we find its
6579           ;; message-id and request it by id instead of number.
6580           (when (and (numberp article)
6581                      gnus-summary-buffer
6582                      (get-buffer gnus-summary-buffer)
6583                      (gnus-buffer-exists-p gnus-summary-buffer))
6584             (with-current-buffer gnus-summary-buffer
6585               (let ((header (gnus-summary-article-header article)))
6586                 (when (< article 0)
6587                   (cond
6588                    ((memq article gnus-newsgroup-sparse)
6589                     ;; This is a sparse gap article.
6590                     (setq do-update-line article)
6591                     (setq article (mail-header-id header))
6592                     (setq sparse-header (gnus-read-header article))
6593                     (setq gnus-newsgroup-sparse
6594                           (delq article gnus-newsgroup-sparse)))
6595                    ((vectorp header)
6596                     ;; It's a real article.
6597                     (setq article (mail-header-id header)))
6598                    (t
6599                     ;; It is an extracted pseudo-article.
6600                     (setq article 'pseudo)
6601                     (gnus-request-pseudo-article header))))
6602
6603                 (let ((method (gnus-find-method-for-group
6604                                gnus-newsgroup-name)))
6605                   (when (and (eq (car method) 'nneething)
6606                              (vectorp header))
6607                     (let ((dir (nneething-get-file-name
6608                                 (mail-header-id header))))
6609                       (when (and (stringp dir)
6610                                  (file-directory-p dir))
6611                         (setq article 'nneething)
6612                         (gnus-group-enter-directory dir))))))))
6613
6614           (cond
6615            ;; Refuse to select canceled articles.
6616            ((and (numberp article)
6617                  gnus-summary-buffer
6618                  (get-buffer gnus-summary-buffer)
6619                  (gnus-buffer-exists-p gnus-summary-buffer)
6620                  (eq (cdr (with-current-buffer gnus-summary-buffer
6621                             (assq article gnus-newsgroup-reads)))
6622                      gnus-canceled-mark))
6623             nil)
6624            ;; We first check `gnus-original-article-buffer'.
6625            ((and (get-buffer gnus-original-article-buffer)
6626                  (numberp article)
6627                  (with-current-buffer gnus-original-article-buffer
6628                    (and (equal (car gnus-original-article) group)
6629                         (eq (cdr gnus-original-article) article))))
6630             ;; `insert-buffer-substring' would incorrectly use the
6631             ;; equivalent of string-make-multibyte which amount to decoding
6632             ;; with locale-coding-system, causing failure of
6633             ;; subsequent decoding.
6634             (insert (mm-string-to-multibyte
6635                      (with-current-buffer gnus-original-article-buffer
6636                        (buffer-substring (point-min) (point-max)))))
6637             'article)
6638            ;; Check the backlog.
6639            ((and gnus-keep-backlog
6640                  (gnus-backlog-request-article group article (current-buffer)))
6641             'article)
6642            ;; Check asynchronous pre-fetch.
6643            ((gnus-async-request-fetched-article group article (current-buffer))
6644             (gnus-async-prefetch-next group article gnus-summary-buffer)
6645             (when (and (numberp article) gnus-keep-backlog)
6646               (gnus-backlog-enter-article group article (current-buffer)))
6647             'article)
6648            ;; Check the cache.
6649            ((and gnus-use-cache
6650                  (numberp article)
6651                  (gnus-cache-request-article article group))
6652             'article)
6653            ;; Check the agent cache.
6654            ((gnus-agent-request-article article group)
6655             'article)
6656            ;; Get the article and put into the article buffer.
6657            ((or (stringp article)
6658                 (numberp article))
6659             (let ((gnus-override-method gnus-override-method)
6660                   (methods (and (stringp article)
6661                                 gnus-refer-article-method))
6662                   (backend (car (gnus-find-method-for-group
6663                                  gnus-newsgroup-name)))
6664                   result
6665                   (inhibit-read-only t))
6666               (if (or (not (listp methods))
6667                       (and (symbolp (car methods))
6668                            (assq (car methods) nnoo-definition-alist)))
6669                   (setq methods (list methods)))
6670               (when (and (null gnus-override-method)
6671                          methods)
6672                 (setq gnus-override-method (pop methods)))
6673               (while (not result)
6674                 (when (eq gnus-override-method 'current)
6675                   (setq gnus-override-method
6676                         (with-current-buffer gnus-summary-buffer
6677                           gnus-current-select-method)))
6678                 (erase-buffer)
6679                 (gnus-kill-all-overlays)
6680                 (let ((gnus-newsgroup-name group))
6681                   (gnus-check-group-server))
6682                 (cond
6683                  ((gnus-request-article article group (current-buffer))
6684                   (when (numberp article)
6685                     (gnus-async-prefetch-next group article
6686                                               gnus-summary-buffer)
6687                     (when gnus-keep-backlog
6688                       (gnus-backlog-enter-article
6689                        group article (current-buffer))))
6690                   (setq result 'article))
6691                  (methods
6692                   (setq gnus-override-method (pop methods)))
6693                  ((not (string-match "^400 "
6694                                      (nnheader-get-report backend)))
6695                   ;; If we get 400 server disconnect, reconnect and
6696                   ;; retry; otherwise, assume the article has expired.
6697                   (setq result 'done))))
6698               (and (eq result 'article) 'article)))
6699            ;; It was a pseudo.
6700            (t article)))
6701
6702       ;; Associate this article with the current summary buffer.
6703       (setq gnus-article-current-summary gnus-summary-buffer)
6704
6705       ;; Take the article from the original article buffer
6706       ;; and place it in the buffer it's supposed to be in.
6707       (when (and (get-buffer gnus-article-buffer)
6708                  (equal (buffer-name (current-buffer))
6709                         (buffer-name (get-buffer gnus-article-buffer))))
6710         (save-excursion
6711           (if (get-buffer gnus-original-article-buffer)
6712               (set-buffer gnus-original-article-buffer)
6713             (set-buffer (gnus-get-buffer-create gnus-original-article-buffer))
6714             (buffer-disable-undo)
6715             (setq major-mode 'gnus-original-article-mode)
6716             (setq buffer-read-only t))
6717           (let ((inhibit-read-only t))
6718             (erase-buffer)
6719             (insert-buffer-substring gnus-article-buffer))
6720           (setq gnus-original-article (cons group article)))
6721
6722         ;; Decode charsets.
6723         (run-hooks 'gnus-article-decode-hook)
6724         ;; Mark article as decoded or not.
6725         (setq gnus-article-decoded-p gnus-article-decode-hook))
6726
6727       ;; Update sparse articles.
6728       (when (and do-update-line
6729                  (or (numberp article)
6730                      (stringp article)))
6731         (let ((buf (current-buffer)))
6732           (set-buffer gnus-summary-buffer)
6733           (gnus-summary-update-article do-update-line sparse-header)
6734           (gnus-summary-goto-subject do-update-line nil t)
6735           (set-window-point (gnus-get-buffer-window (current-buffer) t)
6736                             (point))
6737           (set-buffer buf))))))
6738
6739 ;;;
6740 ;;; Article editing
6741 ;;;
6742
6743 (defcustom gnus-article-edit-mode-hook nil
6744   "Hook run in article edit mode buffers."
6745   :group 'gnus-article-various
6746   :type 'hook)
6747
6748 (defvar gnus-article-edit-done-function nil)
6749
6750 (defvar gnus-article-edit-mode-map nil)
6751
6752 ;; Should we be using derived.el for this?
6753 (unless gnus-article-edit-mode-map
6754   (setq gnus-article-edit-mode-map (make-keymap))
6755   (set-keymap-parent gnus-article-edit-mode-map text-mode-map)
6756
6757   (gnus-define-keys gnus-article-edit-mode-map
6758     "\C-c?"    describe-mode
6759     "\C-c\C-c" gnus-article-edit-done
6760     "\C-c\C-k" gnus-article-edit-exit
6761     "\C-c\C-f\C-t" message-goto-to
6762     "\C-c\C-f\C-o" message-goto-from
6763     "\C-c\C-f\C-b" message-goto-bcc
6764     ;;"\C-c\C-f\C-w" message-goto-fcc
6765     "\C-c\C-f\C-c" message-goto-cc
6766     "\C-c\C-f\C-s" message-goto-subject
6767     "\C-c\C-f\C-r" message-goto-reply-to
6768     "\C-c\C-f\C-n" message-goto-newsgroups
6769     "\C-c\C-f\C-d" message-goto-distribution
6770     "\C-c\C-f\C-f" message-goto-followup-to
6771     "\C-c\C-f\C-m" message-goto-mail-followup-to
6772     "\C-c\C-f\C-k" message-goto-keywords
6773     "\C-c\C-f\C-u" message-goto-summary
6774     "\C-c\C-f\C-i" message-insert-or-toggle-importance
6775     "\C-c\C-f\C-a" message-generate-unsubscribed-mail-followup-to
6776     "\C-c\C-b" message-goto-body
6777     "\C-c\C-i" message-goto-signature
6778
6779     "\C-c\C-t" message-insert-to
6780     "\C-c\C-n" message-insert-newsgroups
6781     "\C-c\C-o" message-sort-headers
6782     "\C-c\C-e" message-elide-region
6783     "\C-c\C-v" message-delete-not-region
6784     "\C-c\C-z" message-kill-to-signature
6785     "\M-\r" message-newline-and-reformat
6786     "\C-c\C-a" mml-attach-file
6787     "\C-a" message-beginning-of-line
6788     "\t" message-tab
6789     "\M-;" comment-region)
6790
6791   (gnus-define-keys (gnus-article-edit-wash-map
6792                      "\C-c\C-w" gnus-article-edit-mode-map)
6793     "f" gnus-article-edit-full-stops))
6794
6795 (easy-menu-define
6796   gnus-article-edit-mode-field-menu gnus-article-edit-mode-map ""
6797   '("Field"
6798     ["Fetch To" message-insert-to t]
6799     ["Fetch Newsgroups" message-insert-newsgroups t]
6800     "----"
6801     ["To" message-goto-to t]
6802     ["From" message-goto-from t]
6803     ["Subject" message-goto-subject t]
6804     ["Cc" message-goto-cc t]
6805     ["Reply-To" message-goto-reply-to t]
6806     ["Summary" message-goto-summary t]
6807     ["Keywords" message-goto-keywords t]
6808     ["Newsgroups" message-goto-newsgroups t]
6809     ["Followup-To" message-goto-followup-to t]
6810     ["Mail-Followup-To" message-goto-mail-followup-to t]
6811     ["Distribution" message-goto-distribution t]
6812     ["Body" message-goto-body t]
6813     ["Signature" message-goto-signature t]))
6814
6815 (define-derived-mode gnus-article-edit-mode message-mode "Article Edit"
6816   "Major mode for editing articles.
6817 This is an extended text-mode.
6818
6819 \\{gnus-article-edit-mode-map}"
6820   (make-local-variable 'gnus-article-edit-done-function)
6821   (make-local-variable 'gnus-prev-winconf)
6822   (set (make-local-variable 'font-lock-defaults)
6823        '(message-font-lock-keywords t))
6824   (set (make-local-variable 'mail-header-separator) "")
6825   (set (make-local-variable 'gnus-article-edit-mode) t)
6826   (easy-menu-add message-mode-field-menu message-mode-map)
6827   (mml-mode)
6828   (setq buffer-read-only nil)
6829   (buffer-enable-undo)
6830   (widen))
6831
6832 (defun gnus-article-edit (&optional force)
6833   "Edit the current article.
6834 This will have permanent effect only in mail groups.
6835 If FORCE is non-nil, allow editing of articles even in read-only
6836 groups."
6837   (interactive "P")
6838   (when (and (not force)
6839              (gnus-group-read-only-p))
6840     (error "The current newsgroup does not support article editing"))
6841   (gnus-article-date-original)
6842   (gnus-article-edit-article
6843    'ignore
6844    `(lambda (no-highlight)
6845       'ignore
6846       (gnus-summary-edit-article-done
6847        ,(or (mail-header-references gnus-current-headers) "")
6848        ,(gnus-group-read-only-p) ,gnus-summary-buffer no-highlight))))
6849
6850 (defun gnus-article-edit-article (start-func exit-func &optional quiet)
6851   "Start editing the contents of the current article buffer."
6852   (let ((winconf (current-window-configuration)))
6853     (set-buffer gnus-article-buffer)
6854     (let ((message-auto-save-directory
6855            ;; Don't associate the article buffer with a draft file.
6856            nil))
6857       (gnus-article-edit-mode))
6858     (funcall start-func)
6859     (set-buffer-modified-p nil)
6860     (gnus-configure-windows 'edit-article)
6861     (setq gnus-article-edit-done-function exit-func)
6862     (setq gnus-prev-winconf winconf)
6863     (unless quiet
6864       (gnus-message 6 "C-c C-c to end edits"))))
6865
6866 (defun gnus-article-edit-done (&optional arg)
6867   "Update the article edits and exit."
6868   (interactive "P")
6869   (let ((func gnus-article-edit-done-function)
6870         (buf (current-buffer))
6871         (start (window-start))
6872         (p (point))
6873         (winconf gnus-prev-winconf))
6874     (widen) ;; Widen it in case that users narrowed the buffer.
6875     (funcall func arg)
6876     (set-buffer buf)
6877     ;; The cache and backlog have to be flushed somewhat.
6878     (when gnus-keep-backlog
6879       (gnus-backlog-remove-article
6880        (car gnus-article-current) (cdr gnus-article-current)))
6881     ;; Flush original article as well.
6882     (when (get-buffer gnus-original-article-buffer)
6883       (with-current-buffer gnus-original-article-buffer
6884         (setq gnus-original-article nil)))
6885     (when gnus-use-cache
6886       (gnus-cache-update-article
6887        (car gnus-article-current) (cdr gnus-article-current)))
6888     ;; We remove all text props from the article buffer.
6889     (kill-all-local-variables)
6890     (set-text-properties (point-min) (point-max) nil)
6891     (gnus-article-mode)
6892     (set-window-configuration winconf)
6893     (set-buffer buf)
6894     (set-window-start (get-buffer-window buf) start)
6895     (set-window-point (get-buffer-window buf) (point)))
6896   (gnus-summary-show-article))
6897
6898 (defun gnus-article-edit-exit ()
6899   "Exit the article editing without updating."
6900   (interactive)
6901   (when (or (not (buffer-modified-p))
6902             (yes-or-no-p "Article modified; kill anyway? "))
6903     (let ((curbuf (current-buffer))
6904           (p (point))
6905           (window-start (window-start)))
6906       (erase-buffer)
6907       (if (gnus-buffer-live-p gnus-original-article-buffer)
6908           (insert-buffer-substring gnus-original-article-buffer))
6909       (let ((winconf gnus-prev-winconf))
6910         (kill-all-local-variables)
6911         (gnus-article-mode)
6912         (set-window-configuration winconf)
6913         ;; Tippy-toe some to make sure that point remains where it was.
6914         (save-current-buffer
6915           (set-buffer curbuf)
6916           (set-window-start (get-buffer-window (current-buffer)) window-start)
6917           (goto-char p))))
6918     (gnus-summary-show-article)))
6919
6920 (defun gnus-article-edit-full-stops ()
6921   "Interactively repair spacing at end of sentences."
6922   (interactive)
6923   (save-excursion
6924     (goto-char (point-min))
6925     (search-forward-regexp "^$" nil t)
6926     (let ((case-fold-search nil))
6927       (query-replace-regexp "\\([.!?][])}]* \\)\\([[({A-Z]\\)" "\\1 \\2"))))
6928
6929 ;;;
6930 ;;; Article highlights
6931 ;;;
6932
6933 ;; Written by Per Abrahamsen <abraham@iesd.auc.dk>.
6934
6935 ;;; Internal Variables:
6936
6937 (defcustom gnus-button-url-regexp
6938   (concat
6939    "\\b\\(\\(www\\.\\|\\(s?https?\\|ftp\\|file\\|gopher\\|"
6940    "nntp\\|news\\|telnet\\|wais\\|mailto\\|info\\):\\)"
6941    "\\(//[-a-z0-9_.]+:[0-9]*\\)?"
6942    (if (string-match "[[:digit:]]" "1") ;; Support POSIX?
6943        (let ((chars "-a-z0-9_=#$@~%&*+\\/[:word:]")
6944              (punct "!?:;.,"))
6945          (concat
6946           "\\(?:"
6947           ;; Match paired parentheses, e.g. in Wikipedia URLs:
6948           ;; http://thread.gmane.org/47B4E3B2.3050402@gmail.com
6949           "[" chars punct "]+" "(" "[" chars punct "]+" "[" chars "]*)" "[" chars "]*"
6950           "\\|"
6951           "[" chars punct     "]+" "[" chars "]"
6952           "\\)"))
6953      (concat ;; XEmacs 21.4 doesn't support POSIX.
6954       "\\([-a-z0-9_=!?#$@~%&*+\\/:;.,]\\|\\w\\)+"
6955       "\\([-a-z0-9_=#$@~%&*+\\/]\\|\\w\\)"))
6956    "\\)")
6957   "Regular expression that matches URLs."
6958   :group 'gnus-article-buttons
6959   :type 'regexp)
6960
6961 (defcustom gnus-button-valid-fqdn-regexp
6962   message-valid-fqdn-regexp
6963   "Regular expression that matches a valid FQDN."
6964   :version "22.1"
6965   :group 'gnus-article-buttons
6966   :type 'regexp)
6967
6968 ;; Regexp suggested by Felix Wiemann in <87oeuomcz9.fsf@news2.ososo.de>
6969 (defcustom gnus-button-valid-localpart-regexp
6970   "[a-z0-9$%(*-=?[_][^<>\")!;:,{}\n\t @]*"
6971   "Regular expression that matches a localpart of mail addresses or MIDs."
6972   :version "22.1"
6973   :group 'gnus-article-buttons
6974   :type 'regexp)
6975
6976 (defcustom gnus-button-man-handler 'manual-entry
6977   "Function to use for displaying man pages.
6978 The function must take at least one argument with a string naming the
6979 man page."
6980   :version "22.1"
6981   :type '(choice (function-item :tag "Man" manual-entry)
6982                  (function-item :tag "Woman" woman)
6983                  (function :tag "Other"))
6984   :group 'gnus-article-buttons)
6985
6986 (defcustom gnus-ctan-url "http://tug.ctan.org/tex-archive/"
6987   "Top directory of a CTAN \(Comprehensive TeX Archive Network\) archive.
6988 If the default site is too slow, try to find a CTAN mirror, see
6989 <URL:http://tug.ctan.org/tex-archive/CTAN.sites?action=/index.html>.  See also
6990 the variable `gnus-button-handle-ctan'."
6991   :version "22.1"
6992   :group 'gnus-article-buttons
6993   :link '(custom-manual "(gnus)Group Parameters")
6994   :type '(choice (const "http://www.tex.ac.uk/tex-archive/")
6995                  (const "http://tug.ctan.org/tex-archive/")
6996                  (const "http://www.dante.de/CTAN/")
6997                  (string :tag "Other")))
6998
6999 (defcustom gnus-button-ctan-handler 'browse-url
7000   "Function to use for displaying CTAN links.
7001 The function must take one argument, the string naming the URL."
7002   :version "22.1"
7003   :type '(choice (function-item :tag "Browse Url" browse-url)
7004                  (function :tag "Other"))
7005   :group 'gnus-article-buttons)
7006
7007 (defcustom gnus-button-handle-ctan-bogus-regexp "^/?tex-archive/\\|^/"
7008   "Bogus strings removed from CTAN URLs."
7009   :version "22.1"
7010   :group 'gnus-article-buttons
7011   :type '(choice (const "^/?tex-archive/\\|/")
7012                  (regexp :tag "Other")))
7013
7014 (defcustom gnus-button-ctan-directory-regexp
7015   (regexp-opt
7016    (list "archive-tools" "biblio" "bibliography" "digests" "documentation"
7017          "dviware" "fonts" "graphics" "help" "indexing" "info" "language"
7018          "languages" "macros" "nonfree" "obsolete" "support" "systems"
7019          "tds" "tools" "usergrps" "web") t)
7020   "Regular expression for ctan directories.
7021 It should match all directories in the top level of `gnus-ctan-url'."
7022   :version "22.1"
7023   :group 'gnus-article-buttons
7024   :type 'regexp)
7025
7026 (defcustom gnus-button-mid-or-mail-regexp
7027   (concat "\\b\\(<?" gnus-button-valid-localpart-regexp "@"
7028           gnus-button-valid-fqdn-regexp
7029           ">?\\)\\b")
7030   "Regular expression that matches a message ID or a mail address."
7031   :version "22.1"
7032   :group 'gnus-article-buttons
7033   :type 'regexp)
7034
7035 (defcustom gnus-button-prefer-mid-or-mail 'gnus-button-mid-or-mail-heuristic
7036   "What to do when the button on a string as \"foo123@bar.invalid\" is pushed.
7037 Strings like this can be either a message ID or a mail address.  If it is one
7038 of the symbols `mid' or `mail', Gnus will always assume that the string is a
7039 message ID or a mail address, respectively.  If this variable is set to the
7040 symbol `ask', always query the user what do do.  If it is a function, this
7041 function will be called with the string as its only argument.  The function
7042 must return `mid', `mail', `invalid' or `ask'."
7043   :version "22.1"
7044   :group 'gnus-article-buttons
7045   :type '(choice (function-item :tag "Heuristic function"
7046                                 gnus-button-mid-or-mail-heuristic)
7047                  (const ask)
7048                  (const mid)
7049                  (const mail)))
7050
7051 (defcustom gnus-button-mid-or-mail-heuristic-alist
7052   '((-10.0 . ".+\\$.+@")
7053     (-10.0 . "#")
7054     (-10.0 . "\\*")
7055     (-5.0  . "\\+[^+]*\\+.*@") ;; # two plus signs
7056     (-5.0  . "@[Nn][Ee][Ww][Ss]") ;; /\@news/i
7057     (-5.0  . "@.*[Dd][Ii][Aa][Ll][Uu][Pp]") ;; /\@.*dialup/i;
7058     (-1.0  . "^[^a-z]+@")
7059     ;;
7060     (-5.0  . "\\.[0-9][0-9]+.*@") ;; "\.[0-9]{2,}.*\@"
7061     (-5.0  . "[a-z].*[A-Z].*[a-z].*[A-Z].*@") ;; "([a-z].*[A-Z].*){2,}\@"
7062     (-3.0  . "[A-Z][A-Z][a-z][a-z].*@")
7063     (-5.0  . "\\...?.?@") ;; (-5.0 . "\..{1,3}\@")
7064     ;;
7065     (-2.0  . "^[0-9]")
7066     (-1.0  . "^[0-9][0-9]")
7067     ;;
7068     ;; -3.0 /^[0-9][0-9a-fA-F]{2,2}/;
7069     (-3.0  . "^[0-9][0-9a-fA-F][0-9a-fA-F][^0-9a-fA-F]")
7070     ;; -5.0 /^[0-9][0-9a-fA-F]{3,3}/;
7071     (-5.0  . "^[0-9][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][^0-9a-fA-F]")
7072     ;;
7073     (-3.0  .  "[0-9][0-9][0-9][0-9][0-9][^0-9].*@") ;; "[0-9]{5,}.*\@"
7074     (-3.0  .  "[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][^0-9].*@")
7075     ;;       "[0-9]{8,}.*\@"
7076     (-3.0
7077      . "[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9].*@")
7078     ;; "[0-9]{12,}.*\@"
7079     ;; compensation for TDMA dated mail addresses:
7080     (25.0  . "-dated-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]+.*@")
7081     ;;
7082     (-20.0 . "\\.fsf@") ;; Gnus
7083     (-20.0 . "^slrn")
7084     (-20.0 . "^Pine")
7085     (-20.0 . "^alpine\\.")
7086     (-20.0 . "_-_") ;; Subject change in thread
7087     ;;
7088     (-20.0 . "\\.ln@") ;; leafnode
7089     (-30.0 . "@ID-[0-9]+\\.[a-zA-Z]+\\.dfncis\\.de")
7090     (-30.0 . "@4[Aa][Xx]\\.com") ;; Forte Agent
7091     ;;
7092     ;; (5.0 . "") ;; $local_part_len <= 7
7093     (10.0  . "^[^0-9]+@")
7094     (3.0   . "^[^0-9]+[0-9][0-9]?[0-9]?@")
7095     ;;      ^[^0-9]+[0-9]{1,3}\@ digits only at end of local part
7096     (3.0   . "\@stud")
7097     ;;
7098     (2.0   . "[a-z][a-z][._-][A-Z][a-z].*@")
7099     ;;
7100     (0.5   . "^[A-Z][a-z]")
7101     (0.5   . "^[A-Z][a-z][a-z]")
7102     (1.5   . "^[A-Z][a-z][A-Z][a-z][^a-z]") ;; ^[A-Z][a-z]{3,3}
7103     (2.0   . "^[A-Z][a-z][A-Z][a-z][a-z][^a-z]")) ;; ^[A-Z][a-z]{4,4}
7104   "An alist of \(RATE . REGEXP\) pairs for `gnus-button-mid-or-mail-heuristic'.
7105
7106 A negative RATE indicates a message IDs, whereas a positive indicates a mail
7107 address.  The REGEXP is processed with `case-fold-search' set to nil."
7108   :version "22.1"
7109   :group 'gnus-article-buttons
7110   :type '(repeat (cons (number :tag "Rate")
7111                        (regexp :tag "Regexp"))))
7112
7113 (defun gnus-button-mid-or-mail-heuristic (mid-or-mail)
7114   "Guess whether MID-OR-MAIL is a message ID or a mail address.
7115 Returns `mid' if MID-OR-MAIL is a message IDs, `mail' if it's a mail
7116 address, `ask' if unsure and `invalid' if the string is invalid."
7117   (let ((case-fold-search nil)
7118         (list gnus-button-mid-or-mail-heuristic-alist)
7119         (result 0) rate regexp lpartlen elem)
7120     (setq lpartlen
7121           (length (gnus-replace-in-string mid-or-mail "^\\(.*\\)@.*$" "\\1")))
7122     (gnus-message 8 "`%s', length of local part=`%s'." mid-or-mail lpartlen)
7123     ;; Certain special cases...
7124     (when (string-match
7125            (concat
7126             "^0[0-9]+-[0-9][0-9][0-9][0-9]@t-online\\.de$\\|"
7127             "^[0-9]+\\.[0-9]+@compuserve\\|"
7128             "@public\\.gmane\\.org")
7129            mid-or-mail)
7130       (gnus-message 8 "`%s' is a known mail address." mid-or-mail)
7131       (setq result 'mail))
7132     (when (string-match "@.*@\\| " mid-or-mail)
7133       (gnus-message 8 "`%s' is invalid." mid-or-mail)
7134       (setq result 'invalid))
7135     ;; Nothing more to do, if result is not a number here...
7136     (when (numberp result)
7137       (while list
7138         (setq elem (car list)
7139               rate (car elem)
7140               regexp (cdr elem)
7141               list (cdr list))
7142         (when (string-match regexp mid-or-mail)
7143           (setq result (+ result rate))
7144           (gnus-message
7145            9 "`%s' matched `%s', rate `%s', result `%s'."
7146            mid-or-mail regexp rate result)))
7147       (when (<= lpartlen 7)
7148         (setq result (+ result 5.0))
7149         (gnus-message 9 "`%s' matched (<= lpartlen 7), result `%s'."
7150                       mid-or-mail result))
7151       (when (>= lpartlen 12)
7152         (gnus-message 9 "`%s' matched (>= lpartlen 12)" mid-or-mail)
7153         (cond
7154          ((string-match "[0-9][^0-9]+[0-9].*@" mid-or-mail)
7155           ;; Long local part should contain realname if e-mail address,
7156           ;; too many digits: message-id.
7157           ;; $score -= 5.0 + 0.1 * $local_part_len;
7158           (setq rate (* -1.0 (+ 5.0 (* 0.1 lpartlen))))
7159           (setq result (+ result rate))
7160           (gnus-message
7161            9 "Many digits in `%s', rate `%s', result `%s'."
7162            mid-or-mail rate result))
7163          ((string-match "[^aeiouy][^aeiouy][^aeiouy][^aeiouy]+.*\@"
7164                         mid-or-mail)
7165           ;; Too few vowels [^aeiouy]{4,}.*\@
7166           (setq result (+ result -5.0))
7167           (gnus-message
7168            9 "Few vowels in `%s', rate `%s', result `%s'."
7169            mid-or-mail -5.0 result))
7170          (t
7171           (setq result (+ result 5.0))
7172           (gnus-message
7173            9 "`%s', rate `%s', result `%s'." mid-or-mail 5.0 result)))))
7174     (gnus-message 8 "`%s': Final rate is `%s'." mid-or-mail result)
7175     ;; Maybe we should make this a customizable alist: (condition . 'result)
7176     (cond
7177      ((symbolp result) result)
7178      ;; Now convert number into proper results:
7179      ((< result -10.0) 'mid)
7180      ((> result  10.0) 'mail)
7181      (t 'ask))))
7182
7183 (defun gnus-button-handle-mid-or-mail (mid-or-mail)
7184   (let* ((pref gnus-button-prefer-mid-or-mail) guessed
7185          (url-mid (concat "news" ":" mid-or-mail))
7186          (url-mailto (concat "mailto" ":" mid-or-mail)))
7187     (gnus-message 9 "mid-or-mail=%s" mid-or-mail)
7188     (when (fboundp pref)
7189       (setq guessed
7190             ;; get rid of surrounding angles...
7191             (funcall pref
7192                      (gnus-replace-in-string mid-or-mail "^<\\|>$" "")))
7193       (if (or (eq 'mid guessed) (eq 'mail guessed))
7194           (setq pref guessed)
7195         (setq pref 'ask)))
7196     (if (eq pref 'ask)
7197         (save-window-excursion
7198           (if (y-or-n-p (concat "Is <" mid-or-mail "> a mail address? "))
7199               (setq pref 'mail)
7200             (setq pref 'mid))))
7201     (cond ((eq pref 'mid)
7202            (gnus-message 8 "calling `gnus-button-handle-news' %s" url-mid)
7203            (gnus-button-handle-news url-mid))
7204           ((eq pref 'mail)
7205            (gnus-message 8 "calling `gnus-url-mailto'  %s" url-mailto)
7206            (gnus-url-mailto url-mailto))
7207           (t (gnus-message 3 "Invalid string.")))))
7208
7209 (defun gnus-button-handle-custom (fun arg)
7210   "Call function FUN on argument ARG.
7211 Both FUN and ARG are supposed to be strings.  ARG will be passed
7212 as a symbol to FUN."
7213   (funcall (intern fun)
7214            (if (string-match "^customize-apropos" fun)
7215                arg
7216              (intern arg))))
7217
7218 (defvar gnus-button-handle-describe-prefix "^\\(C-h\\|<?[Ff]1>?\\)")
7219
7220 ;; FIXME: Maybe we should merge some of the functions that do quite similar
7221 ;; stuff?
7222
7223 (defun gnus-button-handle-describe-function (url)
7224   "Call `describe-function' when pushing the corresponding URL button."
7225   (describe-function
7226    (intern
7227     (gnus-replace-in-string url gnus-button-handle-describe-prefix ""))))
7228
7229 (defun gnus-button-handle-describe-variable (url)
7230   "Call `describe-variable' when pushing the corresponding URL button."
7231   (describe-variable
7232    (intern
7233     (gnus-replace-in-string url gnus-button-handle-describe-prefix ""))))
7234
7235 (defun gnus-button-handle-symbol (url)
7236 "Display help on variable or function.
7237 Calls `describe-variable' or `describe-function'."
7238   (let ((sym (intern url)))
7239     (cond
7240      ((fboundp sym) (describe-function sym))
7241      ((boundp sym) (describe-variable sym))
7242      (t (gnus-message 3 "`%s' is not a known function of variable." url)))))
7243
7244 (defun gnus-button-handle-describe-key (url)
7245   "Call `describe-key' when pushing the corresponding URL button."
7246   (let* ((key-string
7247           (gnus-replace-in-string url gnus-button-handle-describe-prefix ""))
7248          (keys (ignore-errors (eval `(kbd ,key-string)))))
7249     (if keys
7250         (describe-key keys)
7251       (gnus-message 3 "Invalid key sequence in button: %s" key-string))))
7252
7253 (defun gnus-button-handle-apropos (url)
7254   "Call `apropos' when pushing the corresponding URL button."
7255   (apropos (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
7256
7257 (defun gnus-button-handle-apropos-command (url)
7258   "Call `apropos' when pushing the corresponding URL button."
7259   (apropos-command
7260    (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
7261
7262 (defun gnus-button-handle-apropos-variable (url)
7263   "Call `apropos' when pushing the corresponding URL button."
7264   (funcall
7265    (if (fboundp 'apropos-variable) 'apropos-variable 'apropos)
7266    (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
7267
7268 (defun gnus-button-handle-apropos-documentation (url)
7269   "Call `apropos' when pushing the corresponding URL button."
7270   (funcall
7271    (if (fboundp 'apropos-documentation) 'apropos-documentation 'apropos)
7272    (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
7273
7274 (defun gnus-button-handle-library (url)
7275   "Call `locate-library' when pushing the corresponding URL button."
7276   (gnus-message 9 "url=`%s'" url)
7277   (let* ((lib (locate-library url))
7278          (file (gnus-replace-in-string (or lib "") "\.elc" ".el")))
7279     (if (not lib)
7280         (gnus-message 1 "Cannot locale library `%s'." url)
7281       (find-file-read-only file))))
7282
7283 (defun gnus-button-handle-ctan (url)
7284   "Call `browse-url' when pushing a CTAN URL button."
7285   (funcall
7286    gnus-button-ctan-handler
7287    (concat
7288     gnus-ctan-url
7289     (gnus-replace-in-string url gnus-button-handle-ctan-bogus-regexp ""))))
7290
7291 (defcustom gnus-button-tex-level 5
7292   "*Integer that says how many TeX-related buttons Gnus will show.
7293 The higher the number, the more buttons will appear and the more false
7294 positives are possible.  Note that you can set this variable local to
7295 specific groups.  Setting it higher in TeX groups is probably a good idea.
7296 See Info node `(gnus)Group Parameters' and the variable `gnus-parameters' on
7297 how to set variables in specific groups."
7298   :version "22.1"
7299   :group 'gnus-article-buttons
7300   :link '(custom-manual "(gnus)Group Parameters")
7301   :type 'integer)
7302
7303 (defcustom gnus-button-man-level 5
7304   "*Integer that says how many man-related buttons Gnus will show.
7305 The higher the number, the more buttons will appear and the more false
7306 positives are possible.  Note that you can set this variable local to
7307 specific groups.  Setting it higher in Unix groups is probably a good idea.
7308 See Info node `(gnus)Group Parameters' and the variable `gnus-parameters' on
7309 how to set variables in specific groups."
7310   :version "22.1"
7311   :group 'gnus-article-buttons
7312   :link '(custom-manual "(gnus)Group Parameters")
7313   :type 'integer)
7314
7315 (defcustom gnus-button-emacs-level 5
7316   "*Integer that says how many emacs-related buttons Gnus will show.
7317 The higher the number, the more buttons will appear and the more false
7318 positives are possible.  Note that you can set this variable local to
7319 specific groups.  Setting it higher in Emacs or Gnus related groups is
7320 probably a good idea.  See Info node `(gnus)Group Parameters' and the variable
7321 `gnus-parameters' on how to set variables in specific groups."
7322   :version "22.1"
7323   :group 'gnus-article-buttons
7324   :link '(custom-manual "(gnus)Group Parameters")
7325   :type 'integer)
7326
7327 (defcustom gnus-button-message-level 5
7328   "*Integer that says how many buttons for news or mail messages will appear.
7329 The higher the number, the more buttons will appear and the more false
7330 positives are possible."
7331   ;; mail addresses, MIDs, URLs for news, ...
7332   :version "22.1"
7333   :group 'gnus-article-buttons
7334   :type 'integer)
7335
7336 (defcustom gnus-button-browse-level 5
7337   "*Integer that says how many buttons for browsing will appear.
7338 The higher the number, the more buttons will appear and the more false
7339 positives are possible."
7340   ;; stuff handled by `browse-url' or `gnus-button-embedded-url'
7341   :version "22.1"
7342   :group 'gnus-article-buttons
7343   :type 'integer)
7344
7345 (defcustom gnus-button-alist
7346   '(("<\\(url:[>\n\t ]*?\\)?\\(nntp\\|news\\):[>\n\t ]*\\([^>\n\t ]*@[^>\n\t ]*\\)>"
7347      0 (>= gnus-button-message-level 0) gnus-button-handle-news 3)
7348     ((concat "\\b\\(nntp\\|news\\):\\("
7349              gnus-button-valid-localpart-regexp "@[a-z0-9.-]+[a-z]\\)")
7350      0 t gnus-button-handle-news 2)
7351     ("\\(\\b<\\(url:[>\n\t ]*\\)?\\(nntp\\|news\\):[>\n\t ]*\\(//\\)?\\([^>\n\t ]*\\)>\\)"
7352      1 (>= gnus-button-message-level 0) gnus-button-fetch-group 5)
7353     ("\\b\\(nntp\\|news\\):\\(//\\)?\\([^'\">\n\t ]+\\)"
7354      0 (>= gnus-button-message-level 0) gnus-button-fetch-group 3)
7355     ;; RFC 2392 (Don't allow `/' in domain part --> CID)
7356     ("\\bmid:\\(//\\)?\\([^'\">\n\t ]+@[^'\">\n\t /]+\\)"
7357      0 (>= gnus-button-message-level 0) gnus-button-message-id 2)
7358     ("\\bin\\( +article\\| +message\\)? +\\(<\\([^\n @<>]+@[^\n @<>]+\\)>\\)"
7359      2 (>= gnus-button-message-level 0) gnus-button-message-id 3)
7360     ("\\b\\(mid\\|message-id\\):? +\\(<\\([^\n @<>]+@[^\n @<>]+\\)>\\)"
7361      2 (>= gnus-button-message-level 0) gnus-button-message-id 3)
7362     ("\\(<URL: *\\)mailto: *\\([^> \n\t]+\\)>"
7363      0 (>= gnus-button-message-level 0) gnus-url-mailto 2)
7364     ;; RFC 2368 (The mailto URL scheme)
7365     ("\\bmailto:\\([-a-z.@_+0-9%=?&/]+\\)"
7366      0 (>= gnus-button-message-level 0) gnus-url-mailto 1)
7367     ("\\bmailto:\\([^ \n\t]+\\)"
7368      0 (>= gnus-button-message-level 0) gnus-url-mailto 1)
7369     ;; CTAN
7370     ((concat "\\bCTAN:[ \t\n]?[^>)!;:,'\n\t ]*\\("
7371              gnus-button-ctan-directory-regexp
7372              "[^][>)!;:,'\n\t ]+\\)")
7373      0 (>= gnus-button-tex-level 1) gnus-button-handle-ctan 1)
7374     ((concat "\\btex-archive/\\("
7375              gnus-button-ctan-directory-regexp
7376              "/[-_.a-z0-9/]+[-_./a-z0-9]+[/a-z0-9]\\)")
7377      1 (>= gnus-button-tex-level 6) gnus-button-handle-ctan 1)
7378     ((concat
7379       "\\b\\("
7380       gnus-button-ctan-directory-regexp
7381       "/[-_.a-z0-9]+/[-_./a-z0-9]+[/a-z0-9]\\)")
7382      1 (>= gnus-button-tex-level 8) gnus-button-handle-ctan 1)
7383     ;; This is info (home-grown style) <info://foo/bar+baz>
7384     ("\\binfo://\\([^'\">\n\t ]+\\)"
7385      0 (>= gnus-button-emacs-level 1) gnus-button-handle-info-url 1)
7386     ;; Info GNOME style <info:foo#bar_baz>
7387     ("\\binfo:\\([^('\n\t\r \"><][^'\n\t\r \"><]*\\)"
7388      0 (>= gnus-button-emacs-level 1) gnus-button-handle-info-url-gnome 1)
7389     ;; Info KDE style <info:(foo)bar baz>
7390     ("<\\(info:\\(([^)]+)[^>\n\r]*\\)\\)>"
7391      1 (>= gnus-button-emacs-level 1) gnus-button-handle-info-url-kde 2)
7392     ("\\((Info-goto-node\\|(info\\)[ \t\n]*\\(\"[^\"]*\"\\))" 0
7393      (>= gnus-button-emacs-level 1) gnus-button-handle-info-url 2)
7394     ("\\b\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+i[ \t\n]+d?[ \t\n]?m[ \t\n]+[^ ]+ ?[^ ]+[ \t\n]+RET\\([ \t\n]+i[ \t\n]+[^ ]+ ?[^ ]+[ \t\n]+RET\\([ \t\n,]*\\)\\)?"
7395      ;; Info links like `C-h i d m Gnus RET' or `C-h i d m Gnus RET i partial RET'
7396      0 (>= gnus-button-emacs-level 1) gnus-button-handle-info-keystrokes 0)
7397     ;; This is custom
7398     ("M-x[ \t\n]\\(customize-[^ ]+\\)[ \t\n]RET[ \t\n]\\([^ ]+\\)[ \t\n]RET" 0
7399      (>= gnus-button-emacs-level 1) gnus-button-handle-custom 1 2)
7400     ;; Emacs help commands
7401     ("M-x[ \t\n]+apropos[ \t\n]+RET[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET"
7402      ;; regexp doesn't match arguments containing ` '.
7403      0 (>= gnus-button-emacs-level 1) gnus-button-handle-apropos 1)
7404     ("M-x[ \t\n]+apropos-command[ \t\n]+RET[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET"
7405      0 (>= gnus-button-emacs-level 1) gnus-button-handle-apropos-command 1)
7406     ("M-x[ \t\n]+apropos-variable[ \t\n]+RET[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET"
7407      0 (>= gnus-button-emacs-level 1) gnus-button-handle-apropos-variable 1)
7408     ("M-x[ \t\n]+apropos-documentation[ \t\n]+RET[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET"
7409      0 (>= gnus-button-emacs-level 1) gnus-button-handle-apropos-documentation 1)
7410     ;; The following entries may lead to many false positives so don't enable
7411     ;; them by default (use a high button level).
7412     ("/\\([a-z][-a-z0-9]+\\.el\\)\\>[^.?]"
7413      ;; Exclude [.?] for URLs in gmane.emacs.cvs
7414      1 (>= gnus-button-emacs-level 8) gnus-button-handle-library 1)
7415     ("`\\([a-z][-a-z0-9]+\\.el\\)'"
7416      1 (>= gnus-button-emacs-level 8) gnus-button-handle-library 1)
7417     ("`\\([a-z][a-z0-9]+-[a-z0-9]+-[-a-z0-9]*[a-z]\\|\\(gnus\\|message\\)-[-a-z]+\\)'"
7418      0 (>= gnus-button-emacs-level 8) gnus-button-handle-symbol 1)
7419     ("`\\([a-z][a-z0-9]+-[a-z]+\\)'"
7420      0 (>= gnus-button-emacs-level 9) gnus-button-handle-symbol 1)
7421     ("(setq[ \t\n]+\\([a-z][a-z0-9]+-[-a-z0-9]+\\)[ \t\n]+.+)"
7422      1 (>= gnus-button-emacs-level 7) gnus-button-handle-describe-variable 1)
7423     ("\\bM-x[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET"
7424      1 (>= gnus-button-emacs-level 7) gnus-button-handle-describe-function 1)
7425     ("\\b\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+f[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET"
7426      0 (>= gnus-button-emacs-level 1) gnus-button-handle-describe-function 2)
7427     ("\\b\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+v[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET"
7428      0 (>= gnus-button-emacs-level 1) gnus-button-handle-describe-variable 2)
7429     ("`\\(\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+k[ \t\n]+\\([^']+\\)\\)'"
7430      ;; Unlike the other regexps we really have to require quoting
7431      ;; here to determine where it ends.
7432      1 (>= gnus-button-emacs-level 1) gnus-button-handle-describe-key 3)
7433     ;; This is how URLs _should_ be embedded in text (RFC 1738, RFC 2396)...
7434     ("<URL: *\\([^\n<>]*\\)>"
7435      1 (>= gnus-button-browse-level 0) gnus-button-embedded-url 1)
7436     ;; RFC 2396 (2.4.3., delims) ...
7437     ("\"URL: *\\([^\n\"]*\\)\""
7438      1 (>= gnus-button-browse-level 0) gnus-button-embedded-url 1)
7439     ;; Raw URLs.
7440     (gnus-button-url-regexp
7441      0 (>= gnus-button-browse-level 0) browse-url 0)
7442     ;; man pages
7443     ("\\b\\([a-z][a-z]+([1-9])\\)\\W"
7444      0 (and (>= gnus-button-man-level 1) (< gnus-button-man-level 3))
7445      gnus-button-handle-man 1)
7446     ;; more man pages: resolv.conf(5), iso_8859-1(7), xterm(1x)
7447     ("\\b\\([a-z][-_.a-z0-9]+([1-9])\\)\\W"
7448      0 (and (>= gnus-button-man-level 3) (< gnus-button-man-level 5))
7449      gnus-button-handle-man 1)
7450     ;; even more: Apache::PerlRun(3pm), PDL::IO::FastRaw(3pm),
7451     ;; SoWWWAnchor(3iv), XSelectInput(3X11), X(1), X(7)
7452     ("\\b\\(\\(?:[a-z][-+_.:a-z0-9]+([1-9][X1a-z]*)\\)\\|\\b\\(?:X([1-9])\\)\\)\\W"
7453      0 (>= gnus-button-man-level 5) gnus-button-handle-man 1)
7454     ;; Recognizing patches to .el files.  This is somewhat obscure,
7455     ;; but considering the percentage of Gnus users who hack Emacs
7456     ;; Lisp files...
7457     ("^--- \\([^ .]+\\.el\\).*\n.*\n@@ -?\\([0-9]+\\)" 1
7458      (>= gnus-button-message-level 4) gnus-button-patch 1 2)
7459     ("^\\*\\*\\* \\([^ .]+\\.el\\).*\n.*\n\\*+\n\\*\\*\\* \\([0-9]+\\)" 1
7460      (>= gnus-button-message-level 4) gnus-button-patch 1 2)
7461     ;; MID or mail: To avoid too many false positives we don't try to catch
7462     ;; all kind of allowed MIDs or mail addresses.  Domain part must contain
7463     ;; at least one dot.  TLD must contain two or three chars or be a know TLD
7464     ;; (info|name|...).  Put this entry near the _end_ of `gnus-button-alist'
7465     ;; so that non-ambiguous entries (see above) match first.
7466     (gnus-button-mid-or-mail-regexp
7467      0 (>= gnus-button-message-level 5) gnus-button-handle-mid-or-mail 1))
7468   "*Alist of regexps matching buttons in article bodies.
7469
7470 Each entry has the form (REGEXP BUTTON FORM CALLBACK PAR...), where
7471 REGEXP: is the string (case insensitive) matching text around the button (can
7472 also be Lisp expression evaluating to a string),
7473 BUTTON: is the number of the regexp grouping actually matching the button,
7474 FORM: is a Lisp expression which must eval to true for the button to
7475 be added,
7476 CALLBACK: is the function to call when the user push this button, and each
7477 PAR: is a number of a regexp grouping whose text will be passed to CALLBACK.
7478
7479 CALLBACK can also be a variable, in that case the value of that
7480 variable it the real callback function."
7481   :group 'gnus-article-buttons
7482   :type '(repeat (list (choice regexp variable sexp)
7483                        (integer :tag "Button")
7484                        (sexp :tag "Form")
7485                        (function :tag "Callback")
7486                        (repeat :tag "Par"
7487                                :inline t
7488                                (integer :tag "Regexp group")))))
7489 (put 'gnus-button-alist 'risky-local-variable t)
7490
7491 (defcustom gnus-header-button-alist
7492   '(("^\\(References\\|Message-I[Dd]\\|^In-Reply-To\\):" "<[^<>]+>"
7493      0 (>= gnus-button-message-level 0) gnus-button-message-id 0)
7494     ("^\\(From\\|Reply-To\\):" ": *\\(.+\\)$"
7495      1 (>= gnus-button-message-level 0) gnus-button-reply 1)
7496     ("^\\(Cc\\|To\\):" "[^ \t\n<>,()\"]+@[^ \t\n<>,()\"]+"
7497      0 (>= gnus-button-message-level 0) gnus-msg-mail 0)
7498     ("^X-[Uu][Rr][Ll]:" gnus-button-url-regexp
7499      0 (>= gnus-button-browse-level 0) browse-url 0)
7500     ("^Subject:" gnus-button-url-regexp
7501      0 (>= gnus-button-browse-level 0) browse-url 0)
7502     ("^[^:]+:" gnus-button-url-regexp
7503      0 (>= gnus-button-browse-level 0) browse-url 0)
7504     ("^OpenPGP:.*url=" gnus-button-url-regexp
7505      0 (>= gnus-button-browse-level 0) gnus-button-openpgp 0)
7506     ("^[^:]+:" "\\bmailto:\\([-a-z.@_+0-9%=?&/]+\\)"
7507      0 (>= gnus-button-message-level 0) gnus-url-mailto 1)
7508     ("^[^:]+:" "\\(<\\(url: \\)?\\(nntp\\|news\\):\\([^>\n ]*\\)>\\)"
7509      1 (>= gnus-button-message-level 0) gnus-button-message-id 4))
7510   "*Alist of headers and regexps to match buttons in article heads.
7511
7512 This alist is very similar to `gnus-button-alist', except that each
7513 alist has an additional HEADER element first in each entry:
7514
7515 \(HEADER REGEXP BUTTON FORM CALLBACK PAR)
7516
7517 HEADER is a regexp to match a header.  For a fuller explanation, see
7518 `gnus-button-alist'."
7519   :group 'gnus-article-buttons
7520   :group 'gnus-article-headers
7521   :type '(repeat (list (regexp :tag "Header")
7522                        (choice regexp variable)
7523                        (integer :tag "Button")
7524                        (sexp :tag "Form")
7525                        (function :tag "Callback")
7526                        (repeat :tag "Par"
7527                                :inline t
7528                                (integer :tag "Regexp group")))))
7529 (put 'gnus-header-button-alist 'risky-local-variable t)
7530
7531 ;;; Commands:
7532
7533 (defun gnus-article-push-button (event)
7534   "Check text under the mouse pointer for a callback function.
7535 If the text under the mouse pointer has a `gnus-callback' property,
7536 call it with the value of the `gnus-data' text property."
7537   (interactive "e")
7538   (set-buffer (window-buffer (posn-window (event-start event))))
7539   (let* ((pos (posn-point (event-start event)))
7540          (data (get-text-property pos 'gnus-data))
7541          (fun (get-text-property pos 'gnus-callback)))
7542     (goto-char pos)
7543     (when fun
7544       (funcall fun data))))
7545
7546 (defun gnus-article-press-button ()
7547   "Check text at point for a callback function.
7548 If the text at point has a `gnus-callback' property,
7549 call it with the value of the `gnus-data' text property."
7550   (interactive)
7551   (let ((data (get-text-property (point) 'gnus-data))
7552         (fun (get-text-property (point) 'gnus-callback)))
7553     (when fun
7554       (funcall fun data))))
7555
7556 (defun gnus-article-highlight (&optional force)
7557   "Highlight current article.
7558 This function calls `gnus-article-highlight-headers',
7559 `gnus-article-highlight-citation',
7560 `gnus-article-highlight-signature', and `gnus-article-add-buttons' to
7561 do the highlighting.  See the documentation for those functions."
7562   (interactive (list 'force))
7563   (gnus-article-highlight-headers)
7564   (gnus-article-highlight-citation force)
7565   (gnus-article-highlight-signature)
7566   (gnus-article-add-buttons force)
7567   (gnus-article-add-buttons-to-head))
7568
7569 (defun gnus-article-highlight-some (&optional force)
7570   "Highlight current article.
7571 This function calls `gnus-article-highlight-headers',
7572 `gnus-article-highlight-signature', and `gnus-article-add-buttons' to
7573 do the highlighting.  See the documentation for those functions."
7574   (interactive (list 'force))
7575   (gnus-article-highlight-headers)
7576   (gnus-article-highlight-signature)
7577   (gnus-article-add-buttons))
7578
7579 (defun gnus-article-highlight-headers ()
7580   "Highlight article headers as specified by `gnus-header-face-alist'."
7581   (interactive)
7582   (gnus-with-article-headers
7583     (let (regexp header-face field-face from hpoints fpoints)
7584       (dolist (entry gnus-header-face-alist)
7585         (goto-char (point-min))
7586         (setq regexp (concat "^\\("
7587                              (if (string-equal "" (nth 0 entry))
7588                                  "[^\t ]"
7589                                (nth 0 entry))
7590                              "\\)")
7591               header-face (nth 1 entry)
7592               field-face (nth 2 entry))
7593         (while (and (re-search-forward regexp nil t)
7594                     (not (eobp)))
7595           (beginning-of-line)
7596           (setq from (point))
7597           (unless (search-forward ":" nil t)
7598             (forward-char 1))
7599           (when (and header-face
7600                      (not (memq (point) hpoints)))
7601             (push (point) hpoints)
7602             (gnus-put-text-property from (point) 'face header-face))
7603           (when (and field-face
7604                      (not (memq (setq from (point)) fpoints)))
7605             (push from fpoints)
7606             (if (re-search-forward "^[^ \t]" nil t)
7607                 (forward-char -2)
7608               (goto-char (point-max)))
7609             (gnus-put-text-property from (point) 'face field-face)))))))
7610
7611 (defun gnus-article-highlight-signature ()
7612   "Highlight the signature in an article.
7613 It does this by highlighting everything after
7614 `gnus-signature-separator' using the face `gnus-signature'."
7615   (interactive)
7616   (gnus-with-article-buffer
7617     (let ((inhibit-point-motion-hooks t))
7618       (save-restriction
7619         (when (and gnus-signature-face
7620                    (gnus-article-narrow-to-signature))
7621           (gnus-overlay-put (gnus-make-overlay (point-min) (point-max) nil t)
7622                             'face gnus-signature-face)
7623           (widen)
7624           (gnus-article-search-signature)
7625           (let ((start (match-beginning 0))
7626                 (end (set-marker (make-marker) (1+ (match-end 0)))))
7627             (gnus-article-add-button start (1- end) 'gnus-signature-toggle
7628                                      end)))))))
7629
7630 (defun gnus-button-in-region-p (b e prop)
7631   "Say whether PROP exists in the region."
7632   (text-property-not-all b e prop nil))
7633
7634 (defun gnus-article-add-buttons (&optional force)
7635   "Find external references in the article and make buttons of them.
7636 \"External references\" are things like Message-IDs and URLs, as
7637 specified by `gnus-button-alist'."
7638   (interactive (list 'force))
7639   (gnus-with-article-buffer
7640     (let ((inhibit-point-motion-hooks t)
7641           (case-fold-search t)
7642           (alist gnus-button-alist)
7643           beg entry regexp)
7644       ;; Remove all old markers.
7645       (let (marker entry new-list)
7646         (while (setq marker (pop gnus-button-marker-list))
7647           (if (or (< marker (point-min)) (>= marker (point-max)))
7648               (push marker new-list)
7649             (goto-char marker)
7650             (when (setq entry (gnus-button-entry))
7651               (put-text-property (match-beginning (nth 1 entry))
7652                                  (match-end (nth 1 entry))
7653                                  'gnus-callback nil))
7654             (set-marker marker nil)))
7655         (setq gnus-button-marker-list new-list))
7656       ;; We skip the headers.
7657       (article-goto-body)
7658       (setq beg (point))
7659       (while (setq entry (pop alist))
7660         (setq regexp (eval (car entry)))
7661         (goto-char beg)
7662         (while (re-search-forward regexp nil t)
7663           (let ((start (match-beginning (nth 1 entry)))
7664                 (end (match-end (nth 1 entry)))
7665                 (from (match-beginning 0)))
7666             (when (and (or (eq t (nth 2 entry))
7667                            (eval (nth 2 entry)))
7668                        (not (gnus-button-in-region-p
7669                              start end 'gnus-callback)))
7670               ;; That optional form returned non-nil, so we add the
7671               ;; button.
7672               (setq from (set-marker (make-marker) from))
7673               (push from gnus-button-marker-list)
7674               (unless (and (eq (car entry) 'gnus-button-url-regexp)
7675                            (gnus-article-extend-url-button from start end))
7676                 (gnus-article-add-button start end
7677                                          'gnus-button-push from)))))))))
7678
7679 (defun gnus-article-extend-url-button (beg start end)
7680   "Extend url button if url is folded into two or more lines.
7681 Return non-nil if button is extended.  BEG is a marker that points to
7682 the beginning position of a text containing url.  START and END are
7683 the endpoints of a url button before it is extended.  The concatenated
7684 url is put as the `gnus-button-url' overlay property on the button."
7685   (let ((opoint (point))
7686         (points (list start end))
7687         url delim regexp)
7688     (prog1
7689         (when (and (progn
7690                      (goto-char end)
7691                      (not (looking-at "[\t ]*[\">]")))
7692                    (progn
7693                      (goto-char start)
7694                      (string-match
7695                       "\\(?:\"\\|\\(<\\)\\)[\t ]*\\(?:url[\t ]*:[\t ]*\\)?\\'"
7696                       (buffer-substring (point-at-bol) start)))
7697                    (progn
7698                      (setq url (list (buffer-substring start end))
7699                            delim (if (match-beginning 1) ">" "\""))
7700                      (beginning-of-line)
7701                      (setq regexp (concat
7702                                    (when (and (looking-at
7703                                                message-cite-prefix-regexp)
7704                                               (< (match-end 0) start))
7705                                      (regexp-quote (match-string 0)))
7706                                    "\
7707 \[\t ]*\\(?:\\([^\t\n \">]+\\)[\t ]*$\\|\\([^\t\n \">]*\\)[\t ]*"
7708                                    delim "\\)"))
7709                      (while (progn
7710                               (forward-line 1)
7711                               (and (looking-at regexp)
7712                                    (prog1
7713                                        (match-beginning 1)
7714                                      (push (or (match-string 2)
7715                                                (match-string 1))
7716                                            url)
7717                                      (push (setq end (or (match-end 2)
7718                                                          (match-end 1)))
7719                                            points)
7720                                      (push (or (match-beginning 2)
7721                                                (match-beginning 1))
7722                                            points)))))
7723                      (match-beginning 2)))
7724           (let (gnus-article-mouse-face widget-mouse-face)
7725             (while points
7726               (gnus-article-add-button (pop points) (pop points)
7727                                        'gnus-button-push beg)))
7728           (let ((overlay (gnus-make-overlay start end)))
7729             (gnus-overlay-put overlay 'evaporate t)
7730             (gnus-overlay-put overlay 'gnus-button-url
7731                               (list (mapconcat 'identity (nreverse url) "")))
7732             (when gnus-article-mouse-face
7733               (gnus-overlay-put overlay 'mouse-face gnus-article-mouse-face)))
7734           t)
7735       (goto-char opoint))))
7736
7737 ;; Add buttons to the head of an article.
7738 (defun gnus-article-add-buttons-to-head ()
7739   "Add buttons to the head of the article."
7740   (interactive)
7741   (gnus-with-article-headers
7742     (let (beg end)
7743       (dolist (entry gnus-header-button-alist)
7744         ;; Each alist entry.
7745         (goto-char (point-min))
7746         (while (re-search-forward (car entry) nil t)
7747           ;; Each header matching the entry.
7748           (setq beg (match-beginning 0))
7749           (setq end (or (and (re-search-forward "^[^ \t]" nil t)
7750                              (match-beginning 0))
7751                         (point-max)))
7752           (goto-char beg)
7753           (while (re-search-forward (eval (nth 1 entry)) end t)
7754             ;; Each match within a header.
7755             (let* ((entry (cdr entry))
7756                    (start (match-beginning (nth 1 entry)))
7757                    (end (match-end (nth 1 entry)))
7758                    (form (nth 2 entry)))
7759               (goto-char (match-end 0))
7760               (when (eval form)
7761                 (gnus-article-add-button
7762                  start end (nth 3 entry)
7763                  (buffer-substring (match-beginning (nth 4 entry))
7764                                    (match-end (nth 4 entry)))))))
7765           (goto-char end))))))
7766
7767 ;;; External functions:
7768
7769 (defun gnus-article-add-button (from to fun &optional data)
7770   "Create a button between FROM and TO with callback FUN and data DATA."
7771   (when gnus-article-button-face
7772     (gnus-overlay-put (gnus-make-overlay from to nil t)
7773                       'face gnus-article-button-face))
7774   (gnus-add-text-properties
7775    from to
7776    (nconc (and gnus-article-mouse-face
7777                (list gnus-mouse-face-prop gnus-article-mouse-face))
7778           (list 'gnus-callback fun)
7779           (and data (list 'gnus-data data))))
7780   (widget-convert-button 'link from to :action 'gnus-widget-press-button
7781                          :button-keymap gnus-widget-button-keymap))
7782
7783 ;;; Internal functions:
7784
7785 (defun gnus-article-set-globals ()
7786   (with-current-buffer gnus-summary-buffer
7787     (gnus-set-global-variables)))
7788
7789 (defun gnus-signature-toggle (end)
7790   (gnus-with-article-buffer
7791     (let ((inhibit-point-motion-hooks t))
7792       (if (text-property-any end (point-max) 'article-type 'signature)
7793           (progn
7794             (gnus-delete-wash-type 'signature)
7795             (gnus-remove-text-properties-when
7796              'article-type 'signature end (point-max)
7797              (cons 'article-type (cons 'signature
7798                                        gnus-hidden-properties))))
7799         (gnus-add-wash-type 'signature)
7800         (gnus-add-text-properties-when
7801          'article-type nil end (point-max)
7802          (cons 'article-type (cons 'signature
7803                                    gnus-hidden-properties)))))
7804     (let ((gnus-article-mime-handle-alist-1 gnus-article-mime-handle-alist))
7805       (gnus-set-mode-line 'article))))
7806
7807 (defun gnus-button-entry ()
7808   ;; Return the first entry in `gnus-button-alist' matching this place.
7809   (let ((alist gnus-button-alist)
7810         (entry nil))
7811     (while alist
7812       (setq entry (pop alist))
7813       (if (looking-at (eval (car entry)))
7814           (setq alist nil)
7815         (setq entry nil)))
7816     entry))
7817
7818 (defun gnus-button-push (marker)
7819   ;; Push button starting at MARKER.
7820   (save-excursion
7821     (goto-char marker)
7822     (let* ((entry (gnus-button-entry))
7823            (inhibit-point-motion-hooks t)
7824            (fun (nth 3 entry))
7825            (args (or (and (eq (car entry) 'gnus-button-url-regexp)
7826                           (get-char-property marker 'gnus-button-url))
7827                      (mapcar (lambda (group)
7828                                (let ((string (match-string group)))
7829                                  (set-text-properties
7830                                   0 (length string) nil string)
7831                                  string))
7832                              (nthcdr 4 entry)))))
7833       (cond
7834        ((fboundp fun)
7835         (apply fun args))
7836        ((and (boundp fun)
7837              (fboundp (symbol-value fun)))
7838         (apply (symbol-value fun) args))
7839        (t
7840         (gnus-message 1 "You must define `%S' to use this button"
7841                       (cons fun args)))))))
7842
7843 (defun gnus-parse-news-url (url)
7844   (let (scheme server port group message-id articles)
7845     (with-temp-buffer
7846       (insert url)
7847       (goto-char (point-min))
7848       (when (looking-at "\\([A-Za-z]+\\):")
7849         (setq scheme (match-string 1))
7850         (goto-char (match-end 0)))
7851       (when (looking-at "//\\([^:/]+\\)\\(:?\\)\\([0-9]+\\)?/")
7852         (setq server (match-string 1))
7853         (setq port (if (stringp (match-string 3))
7854                        (string-to-number (match-string 3))
7855                      (match-string 3)))
7856         (goto-char (match-end 0)))
7857
7858       (cond
7859        ((looking-at "\\(.*@.*\\)")
7860         (setq message-id (match-string 1)))
7861        ((looking-at "\\([^/]+\\)/\\([-0-9]+\\)")
7862         (setq group (match-string 1)
7863               articles (split-string (match-string 2) "-")))
7864        ((looking-at "\\([^/]+\\)/?")
7865         (setq group (match-string 1)))
7866        (t
7867         (error "Unknown news URL syntax"))))
7868     (list scheme server port group message-id articles)))
7869
7870 (defun gnus-button-handle-news (url)
7871   "Fetch a news URL."
7872   (destructuring-bind (scheme server port group message-id articles)
7873       (gnus-parse-news-url url)
7874     (cond
7875      (message-id
7876       (with-current-buffer gnus-summary-buffer
7877         (if server
7878             (let ((gnus-refer-article-method
7879                    (nconc (list (list 'nntp server))
7880                           gnus-refer-article-method))
7881                   (nntp-port-number (or port "nntp")))
7882               (gnus-message 7 "Fetching %s with %s"
7883                             message-id gnus-refer-article-method)
7884               (gnus-summary-refer-article message-id))
7885           (gnus-summary-refer-article message-id))))
7886      (group
7887       (gnus-button-fetch-group url)))))
7888
7889 (defun gnus-button-patch (library line)
7890   "Visit an Emacs Lisp library LIBRARY on line LINE."
7891   (interactive)
7892   (let ((file (locate-library (file-name-nondirectory library))))
7893     (unless file
7894       (error "Couldn't find library %s" library))
7895     (find-file file)
7896     (goto-line (string-to-number line))))
7897
7898 (defun gnus-button-handle-man (url)
7899   "Fetch a man page."
7900   (gnus-message 9 "`%s' `%s'" gnus-button-man-handler url)
7901   (when (eq gnus-button-man-handler 'woman)
7902     (setq url (gnus-replace-in-string url "([1-9][X1a-z]*).*\\'" "")))
7903   (gnus-message 9 "`%s' `%s'" gnus-button-man-handler url)
7904   (funcall gnus-button-man-handler url))
7905
7906 (defun gnus-button-handle-info-url (url)
7907   "Fetch an info URL."
7908   (setq url (mm-subst-char-in-string ?+ ?\  url))
7909   (cond
7910    ((string-match "^\\([^:/]+\\)?/\\(.*\\)" url)
7911     (gnus-info-find-node
7912      (concat "(" (or (gnus-url-unhex-string (match-string 1 url))
7913                      "Gnus")
7914              ")" (gnus-url-unhex-string (match-string 2 url)))))
7915    ((string-match "([^)\"]+)[^\"]+" url)
7916     (setq url
7917           (gnus-replace-in-string
7918            (gnus-replace-in-string url "[\n\t ]+" " ") "\"" ""))
7919     (gnus-info-find-node url))
7920    (t (error "Can't parse %s" url))))
7921
7922 (defun gnus-button-handle-info-url-gnome (url)
7923   "Fetch GNOME style info URL."
7924   (setq url (mm-subst-char-in-string ?_ ?\  url))
7925   (if (string-match "\\([^#]+\\)#?\\(.*\\)" url)
7926       (gnus-info-find-node
7927        (concat "("
7928                (gnus-url-unhex-string
7929                  (match-string 1 url))
7930                ")"
7931                (or (gnus-url-unhex-string
7932                     (match-string 2 url))
7933                    "Top")))
7934     (error "Can't parse %s" url)))
7935
7936 (defun gnus-button-handle-info-url-kde (url)
7937   "Fetch KDE style info URL."
7938   (gnus-info-find-node (gnus-url-unhex-string url)))
7939
7940 ;; (info) will autoload info.el
7941 (declare-function Info-menu "info" (menu-item &optional fork))
7942 (declare-function Info-index-next "info" (num))
7943
7944 (defun gnus-button-handle-info-keystrokes (url)
7945   "Call `info' when pushing the corresponding URL button."
7946   ;; For links like `C-h i d m gnus RET part RET , ,', `C-h i d m CC Mode RET'.
7947   (let (node indx comma)
7948     (if (string-match
7949          (concat "\\b\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+i[ \t\n]+d?[ \t\n]?m[ \t\n]+"
7950                  "\\([^ ]+ ?[^ ]+\\)[ \t\n]+RET"
7951                  "\\([ \t\n]+i[ \t\n]+[^ ]+ ?[^ ]+[ \t\n]+RET"
7952                  "\\(?:[ \t\n,]*\\)\\)?")
7953          url)
7954         (setq node (match-string 2 url)
7955               indx (match-string 3 url))
7956       (error "Can't parse %s" url))
7957     (info)
7958     (Info-directory)
7959     (Info-menu node)
7960     (when (> (length indx) 0)
7961       (string-match (concat "[ \t\n]+i[ \t\n]+\\([^ ]+ ?[^ ]+\\)[ \t\n]+RET"
7962                             "\\([ \t\n,]*\\)")
7963                     indx)
7964       (setq comma (match-string 2 indx))
7965       (setq indx  (match-string 1 indx))
7966       (Info-index indx)
7967       (when comma
7968         (dotimes (i (with-temp-buffer
7969                       (insert comma)
7970                       ;; Note: the XEmacs version of `how-many' takes
7971                       ;; no optional argument.
7972                       (goto-char (point-min))
7973                       (how-many ",")))
7974           (Info-index-next 1)))
7975       nil)))
7976
7977 ;; Called after pgg-snarf-keys-region, which autoloads pgg.el.
7978 (declare-function pgg-display-output-buffer "pgg" (start end status))
7979
7980 (defun gnus-button-openpgp (url)
7981   "Retrieve and add an OpenPGP key given URL from an OpenPGP header."
7982   (with-temp-buffer
7983     (mm-url-insert-file-contents-external url)
7984     (pgg-snarf-keys-region (point-min) (point-max))
7985     (pgg-display-output-buffer nil nil nil)))
7986
7987 (defun gnus-button-message-id (message-id)
7988   "Fetch MESSAGE-ID."
7989   (with-current-buffer gnus-summary-buffer
7990     (gnus-summary-refer-article message-id)))
7991
7992 (defun gnus-button-fetch-group (address &rest ignore)
7993   "Fetch GROUP specified by ADDRESS."
7994   (when (string-match "\\`\\(nntp\\|news\\):\\(//\\)?\\(.*\\)\\'"
7995                       address)
7996     ;; Allow to use `gnus-button-fetch-group' in `browse-url-browser-function'
7997     ;; for nntp:// and news://
7998     (setq address (match-string 3 address)))
7999   (if (not (string-match "[:/]" address))
8000       ;; This is just a simple group url.
8001       (gnus-group-read-ephemeral-group address gnus-select-method)
8002     (if (not
8003          (string-match
8004           "^\\([^:/]+\\)\\(:\\([^/]+\\)\\)?/\\([^/]+\\)\\(/\\([0-9]+\\)\\)?"
8005           address))
8006         (error "Can't parse %s" address)
8007       (gnus-group-read-ephemeral-group
8008        (match-string 4 address)
8009        `(nntp ,(match-string 1 address)
8010               (nntp-address ,(match-string 1 address))
8011               (nntp-port-number ,(if (match-end 3)
8012                                      (match-string 3 address)
8013                                    "nntp")))
8014        nil nil nil
8015        (and (match-end 6) (list (string-to-number (match-string 6 address))))))))
8016
8017 (defun gnus-url-parse-query-string (query &optional downcase)
8018   (let (retval pairs cur key val)
8019     (setq pairs (split-string query "&"))
8020     (while pairs
8021       (setq cur (car pairs)
8022             pairs (cdr pairs))
8023       (if (not (string-match "=" cur))
8024           nil                           ; Grace
8025         (setq key (gnus-url-unhex-string (substring cur 0 (match-beginning 0)))
8026               val (gnus-url-unhex-string (substring cur (match-end 0) nil) t))
8027         (if downcase
8028             (setq key (downcase key)))
8029         (setq cur (assoc key retval))
8030         (if cur
8031             (setcdr cur (cons val (cdr cur)))
8032           (setq retval (cons (list key val) retval)))))
8033     retval))
8034
8035 (defun gnus-url-mailto (url)
8036   ;; Send mail to someone
8037   (when (string-match "mailto:/*\\(.*\\)" url)
8038     (setq url (substring url (match-beginning 1) nil)))
8039   (let (to args subject func)
8040     (setq args (gnus-url-parse-query-string
8041                 (if (string-match "^\\?" url)
8042                     (substring url 1)
8043                   (if (string-match "^\\([^?]+\\)\\?\\(.*\\)" url)
8044                       (concat "to=" (match-string 1 url) "&"
8045                               (match-string 2 url))
8046                     (concat "to=" url)))
8047                 t)
8048           subject (cdr-safe (assoc "subject" args)))
8049     (gnus-msg-mail)
8050     (while args
8051       (setq func (intern-soft (concat "message-goto-" (downcase (caar args)))))
8052       (if (fboundp func)
8053           (funcall func)
8054         (message-position-on-field (caar args)))
8055       (insert (gnus-replace-in-string
8056                (mapconcat 'identity (reverse (cdar args)) ", ")
8057                "\r\n" "\n" t))
8058       (setq args (cdr args)))
8059     (if subject
8060         (message-goto-body)
8061       (message-goto-subject))))
8062
8063 (defun gnus-button-embedded-url (address)
8064   "Activate ADDRESS with `browse-url'."
8065   (browse-url (gnus-strip-whitespace address)))
8066
8067 ;;; Next/prev buttons in the article buffer.
8068
8069 (defvar gnus-next-page-line-format "%{%(Next page...%)%}\n")
8070 (defvar gnus-prev-page-line-format "%{%(Previous page...%)%}\n")
8071
8072 (defvar gnus-prev-page-map
8073   (let ((map (make-sparse-keymap)))
8074     (define-key map gnus-mouse-2 'gnus-button-prev-page)
8075     (define-key map "\r" 'gnus-button-prev-page)
8076     map))
8077
8078 (defvar gnus-next-page-map
8079   (let ((map (make-sparse-keymap)))
8080     (unless (>= emacs-major-version 21)
8081       ;; XEmacs doesn't care.
8082       (set-keymap-parent map gnus-article-mode-map))
8083     (define-key map gnus-mouse-2 'gnus-button-next-page)
8084     (define-key map "\r" 'gnus-button-next-page)
8085     map))
8086
8087 (defun gnus-insert-prev-page-button ()
8088   (let ((b (point)) e
8089         (inhibit-read-only t))
8090     (gnus-eval-format
8091      gnus-prev-page-line-format nil
8092      `(keymap ,gnus-prev-page-map
8093               gnus-prev t
8094               gnus-callback gnus-article-button-prev-page
8095               article-type annotation))
8096     (setq e (if (bolp)
8097                 ;; Exclude a newline.
8098                 (1- (point))
8099               (point)))
8100     (when gnus-article-button-face
8101       (gnus-overlay-put (gnus-make-overlay b e nil t)
8102                         'face gnus-article-button-face))
8103     (widget-convert-button
8104      'link b e
8105      :action 'gnus-button-prev-page
8106      :button-keymap gnus-prev-page-map)))
8107
8108 (defun gnus-button-next-page (&optional args more-args)
8109   "Go to the next page."
8110   (interactive)
8111   (let ((win (selected-window)))
8112     (select-window (gnus-get-buffer-window gnus-article-buffer t))
8113     (gnus-article-next-page)
8114     (select-window win)))
8115
8116 (defun gnus-button-prev-page (&optional args more-args)
8117   "Go to the prev page."
8118   (interactive)
8119   (let ((win (selected-window)))
8120     (select-window (gnus-get-buffer-window gnus-article-buffer t))
8121     (gnus-article-prev-page)
8122     (select-window win)))
8123
8124 (defun gnus-insert-next-page-button ()
8125   (let ((b (point)) e
8126         (inhibit-read-only t))
8127     (gnus-eval-format gnus-next-page-line-format nil
8128                       `(keymap ,gnus-next-page-map
8129                                gnus-next t
8130                                gnus-callback gnus-article-button-next-page
8131                                article-type annotation))
8132     (setq e (if (bolp)
8133                 ;; Exclude a newline.
8134                 (1- (point))
8135               (point)))
8136     (when gnus-article-button-face
8137       (gnus-overlay-put (gnus-make-overlay b e nil t)
8138                         'face gnus-article-button-face))
8139     (widget-convert-button
8140      'link b e
8141      :action 'gnus-button-next-page
8142      :button-keymap gnus-next-page-map)))
8143
8144 (defun gnus-article-button-next-page (arg)
8145   "Go to the next page."
8146   (interactive "P")
8147   (let ((win (selected-window)))
8148     (select-window (gnus-get-buffer-window gnus-article-buffer t))
8149     (gnus-article-next-page)
8150     (select-window win)))
8151
8152 (defun gnus-article-button-prev-page (arg)
8153   "Go to the prev page."
8154   (interactive "P")
8155   (let ((win (selected-window)))
8156     (select-window (gnus-get-buffer-window gnus-article-buffer t))
8157     (gnus-article-prev-page)
8158     (select-window win)))
8159
8160 (defvar gnus-decode-header-methods
8161   '(mail-decode-encoded-word-region)
8162   "List of methods used to decode headers.
8163
8164 This variable is a list of FUNCTION or (REGEXP . FUNCTION).  If item
8165 is FUNCTION, FUNCTION will be applied to all newsgroups.  If item is a
8166 \(REGEXP . FUNCTION), FUNCTION will be only apply to the newsgroups
8167 whose names match REGEXP.
8168
8169 For example:
8170 \((\"chinese\" . gnus-decode-encoded-word-region-by-guess)
8171  mail-decode-encoded-word-region
8172  (\"chinese\" . rfc1843-decode-region))
8173 ")
8174
8175 (defvar gnus-decode-header-methods-cache nil)
8176
8177 (defun gnus-multi-decode-header (start end)
8178   "Apply the functions from `gnus-encoded-word-methods' that match."
8179   (unless (and gnus-decode-header-methods-cache
8180                (eq gnus-newsgroup-name
8181                    (car gnus-decode-header-methods-cache)))
8182     (setq gnus-decode-header-methods-cache (list gnus-newsgroup-name))
8183     (dolist (x gnus-decode-header-methods)
8184       (if (symbolp x)
8185           (nconc gnus-decode-header-methods-cache (list x))
8186         (if (and gnus-newsgroup-name
8187                  (string-match (car x) gnus-newsgroup-name))
8188             (nconc gnus-decode-header-methods-cache
8189                    (list (cdr x)))))))
8190   (let ((xlist gnus-decode-header-methods-cache))
8191     (pop xlist)
8192     (save-restriction
8193       (narrow-to-region start end)
8194       (while xlist
8195         (funcall (pop xlist) (point-min) (point-max))))))
8196
8197 ;;;
8198 ;;; Treatment top-level handling.
8199 ;;;
8200
8201 (defun gnus-treat-article (condition &optional part-number total-parts type)
8202   (let ((length (- (point-max) (point-min)))
8203         (alist gnus-treatment-function-alist)
8204         (article-goto-body-goes-to-point-min-p t)
8205         (treated-type
8206          (or (not type)
8207              (catch 'found
8208                (let ((list gnus-article-treat-types))
8209                  (while list
8210                    (when (string-match (pop list) type)
8211                      (throw 'found t)))))))
8212         (highlightp (gnus-visual-p 'article-highlight 'highlight))
8213         val elem)
8214     (gnus-run-hooks 'gnus-part-display-hook)
8215     (dolist (elem alist)
8216       (setq val
8217             (save-excursion
8218               (when (gnus-buffer-live-p gnus-summary-buffer)
8219                 (set-buffer gnus-summary-buffer))
8220               (symbol-value (car elem))))
8221       (when (and (or (consp val)
8222                      treated-type)
8223                  (gnus-treat-predicate val)
8224                  (or (not (get (car elem) 'highlight))
8225                      highlightp))
8226         (save-restriction
8227           (funcall (cadr elem)))))))
8228
8229 ;; Dynamic variables.
8230 (defvar part-number)
8231 (defvar total-parts)
8232 (defvar type)
8233 (defvar condition)
8234 (defvar length)
8235
8236 (defun gnus-treat-predicate (val)
8237   (cond
8238    ((null val)
8239     nil)
8240    (condition
8241     (eq condition val))
8242    ((and (listp val)
8243          (stringp (car val)))
8244     (apply 'gnus-or (mapcar `(lambda (s)
8245                                (string-match s ,(or gnus-newsgroup-name "")))
8246                             val)))
8247    ((listp val)
8248     (let ((pred (pop val)))
8249       (cond
8250        ((eq pred 'or)
8251         (apply 'gnus-or (mapcar 'gnus-treat-predicate val)))
8252        ((eq pred 'and)
8253         (apply 'gnus-and (mapcar 'gnus-treat-predicate val)))
8254        ((eq pred 'not)
8255         (not (gnus-treat-predicate (car val))))
8256        ((eq pred 'typep)
8257         (equal (car val) type))
8258        (t
8259         (error "%S is not a valid predicate" pred)))))
8260    ((eq val t)
8261     t)
8262    ((eq val 'head)
8263     nil)
8264    ((eq val 'first)
8265     (eq part-number 1))
8266    ((eq val 'last)
8267     (eq part-number total-parts))
8268    ((numberp val)
8269     (< length val))
8270    (t
8271     (error "%S is not a valid value" val))))
8272
8273 (defun gnus-article-encrypt-body (protocol &optional n)
8274   "Encrypt the article body."
8275   (interactive
8276    (list
8277     (or gnus-article-encrypt-protocol
8278         (completing-read "Encrypt protocol: "
8279                          gnus-article-encrypt-protocol-alist
8280                          nil t))
8281     current-prefix-arg))
8282   ;; User might hit `K E' instead of `K e', so prompt once.
8283   (when (and gnus-article-encrypt-protocol
8284              gnus-novice-user)
8285     (unless (gnus-y-or-n-p "Really encrypt article(s)? ")
8286       (error "Encrypt aborted.")))
8287   (let ((func (cdr (assoc protocol gnus-article-encrypt-protocol-alist))))
8288     (unless func
8289       (error "Can't find the encrypt protocol %s" protocol))
8290     (if (member gnus-newsgroup-name '("nndraft:delayed"
8291                                       "nndraft:drafts"
8292                                       "nndraft:queue"))
8293         (error "Can't encrypt the article in group %s"
8294                gnus-newsgroup-name))
8295     (gnus-summary-iterate n
8296       (with-current-buffer gnus-summary-buffer
8297         (let ((mail-parse-charset gnus-newsgroup-charset)
8298               (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets)
8299               (summary-buffer gnus-summary-buffer)
8300               references point)
8301           (gnus-set-global-variables)
8302           (when (gnus-group-read-only-p)
8303             (error "The current newsgroup does not support article encrypt"))
8304           (gnus-summary-show-article t)
8305           (setq references
8306               (or (mail-header-references gnus-current-headers) ""))
8307           (set-buffer gnus-article-buffer)
8308           (let* ((inhibit-read-only t)
8309                  (headers
8310                   (mapcar (lambda (field)
8311                             (and (save-restriction
8312                                    (message-narrow-to-head)
8313                                    (goto-char (point-min))
8314                                    (search-forward field nil t))
8315                                  (prog2
8316                                      (message-narrow-to-field)
8317                                      (buffer-string)
8318                                    (delete-region (point-min) (point-max))
8319                                    (widen))))
8320                           '("Content-Type:" "Content-Transfer-Encoding:"
8321                             "Content-Disposition:"))))
8322             (message-narrow-to-head)
8323             (message-remove-header "MIME-Version")
8324             (goto-char (point-max))
8325             (setq point (point))
8326             (insert (apply 'concat headers))
8327             (widen)
8328             (narrow-to-region point (point-max))
8329             (let ((message-options message-options))
8330               (message-options-set 'message-sender user-mail-address)
8331               (message-options-set 'message-recipients user-mail-address)
8332               (message-options-set 'message-sign-encrypt 'not)
8333               (funcall func))
8334             (goto-char (point-min))
8335             (insert "MIME-Version: 1.0\n")
8336             (widen)
8337             (gnus-summary-edit-article-done
8338              references nil summary-buffer t))
8339           (when gnus-keep-backlog
8340             (gnus-backlog-remove-article
8341              (car gnus-article-current) (cdr gnus-article-current)))
8342           (when (get-buffer gnus-original-article-buffer)
8343             (with-current-buffer gnus-original-article-buffer
8344               (setq gnus-original-article nil)))
8345           (when gnus-use-cache
8346             (gnus-cache-update-article
8347              (car gnus-article-current) (cdr gnus-article-current))))))))
8348
8349 (defvar gnus-mime-security-button-line-format "%{%([[%t:%i]%D]%)%}\n"
8350   "The following specs can be used:
8351 %t  The security MIME type
8352 %i  Additional info
8353 %d  Details
8354 %D  Details if button is pressed")
8355
8356 (defvar gnus-mime-security-button-end-line-format "%{%([[End of %t]%D]%)%}\n"
8357   "The following specs can be used:
8358 %t  The security MIME type
8359 %i  Additional info
8360 %d  Details
8361 %D  Details if button is pressed")
8362
8363 (defvar gnus-mime-security-button-line-format-alist
8364   '((?t gnus-tmp-type ?s)
8365     (?i gnus-tmp-info ?s)
8366     (?d gnus-tmp-details ?s)
8367     (?D gnus-tmp-pressed-details ?s)))
8368
8369 (defvar gnus-mime-security-button-commands
8370   '((gnus-article-press-button "\r" "Show Detail")
8371     (undefined "v")
8372     (undefined "t")
8373     (undefined "C")
8374     (gnus-mime-security-save-part "o" "Save...")
8375     (undefined "\C-o")
8376     (undefined "r")
8377     (undefined "d")
8378     (undefined "c")
8379     (undefined "i")
8380     (undefined "E")
8381     (undefined "e")
8382     (undefined "p")
8383     (gnus-mime-security-pipe-part "|" "Pipe To Command...")
8384     (undefined ".")))
8385
8386 (defvar gnus-mime-security-button-map
8387   (let ((map (make-sparse-keymap)))
8388     (define-key map gnus-mouse-2 'gnus-article-push-button)
8389     (define-key map gnus-down-mouse-3 'gnus-mime-security-button-menu)
8390     (dolist (c gnus-mime-security-button-commands)
8391       (define-key map (cadr c) (car c)))
8392     map))
8393
8394 (easy-menu-define
8395   gnus-mime-security-button-menu gnus-mime-security-button-map
8396   "Security button menu."
8397   `("Security Part"
8398     ,@(delq nil
8399             (mapcar (lambda (c)
8400                       (unless (eq (car c) 'undefined)
8401                         (vector (caddr c) (car c) :active t)))
8402                     gnus-mime-security-button-commands))))
8403
8404 (defun gnus-mime-security-button-menu (event prefix)
8405   "Construct a context-sensitive menu of security commands."
8406   (interactive "e\nP")
8407   (save-window-excursion
8408     (let ((pos (event-start event)))
8409       (select-window (posn-window pos))
8410       (goto-char (posn-point pos))
8411       (gnus-article-check-buffer)
8412       (popup-menu gnus-mime-security-button-menu nil prefix))))
8413
8414 (defvar gnus-mime-security-details-buffer nil)
8415
8416 (defvar gnus-mime-security-button-pressed nil)
8417
8418 (defvar gnus-mime-security-show-details-inline t
8419   "If non-nil, show details in the article buffer.")
8420
8421 (defun gnus-mime-security-verify-or-decrypt (handle)
8422   (mm-remove-parts (cdr handle))
8423   (let ((region (mm-handle-multipart-ctl-parameter handle 'gnus-region))
8424         point (inhibit-read-only t))
8425     (if region
8426         (goto-char (car region)))
8427     (setq point (point))
8428     (with-current-buffer (mm-handle-multipart-original-buffer handle)
8429       (let* ((mm-verify-option 'known)
8430              (mm-decrypt-option 'known)
8431              (nparts (mm-possibly-verify-or-decrypt (cdr handle) handle)))
8432         (unless (eq nparts (cdr handle))
8433           (mm-destroy-parts (cdr handle))
8434           (setcdr handle nparts))))
8435     (gnus-mime-display-security handle)
8436     (when region
8437       (delete-region (point) (cdr region))
8438       (set-marker (car region) nil)
8439       (set-marker (cdr region) nil))
8440     (goto-char point)))
8441
8442 (defun gnus-mime-security-show-details (handle)
8443   (let ((details (mm-handle-multipart-ctl-parameter handle 'gnus-details)))
8444     (if (not details)
8445         (gnus-message 5 "No details.")
8446       (if gnus-mime-security-show-details-inline
8447           (let ((gnus-mime-security-button-pressed
8448                  (not (get-text-property (point) 'gnus-mime-details)))
8449                 (gnus-mime-security-button-line-format
8450                  (get-text-property (point) 'gnus-line-format))
8451                 (inhibit-read-only t))
8452             (forward-char -1)
8453             (while (eq (get-text-property (point) 'gnus-line-format)
8454                        gnus-mime-security-button-line-format)
8455               (forward-char -1))
8456             (forward-char)
8457             (save-restriction
8458               (narrow-to-region (point) (point))
8459               (gnus-insert-mime-security-button handle))
8460             (delete-region (point)
8461                            (or (text-property-not-all
8462                                 (point) (point-max)
8463                                 'gnus-line-format
8464                                 gnus-mime-security-button-line-format)
8465                                (point-max))))
8466         ;; Not inlined.
8467         (if (gnus-buffer-live-p gnus-mime-security-details-buffer)
8468             (with-current-buffer gnus-mime-security-details-buffer
8469               (erase-buffer)
8470               t)
8471           (setq gnus-mime-security-details-buffer
8472                 (gnus-get-buffer-create "*MIME Security Details*")))
8473         (with-current-buffer gnus-mime-security-details-buffer
8474           (insert details)
8475           (goto-char (point-min)))
8476         (pop-to-buffer gnus-mime-security-details-buffer)))))
8477
8478 (defun gnus-mime-security-press-button (handle)
8479   (save-excursion
8480     (if (mm-handle-multipart-ctl-parameter handle 'gnus-info)
8481         (gnus-mime-security-show-details handle)
8482       (gnus-mime-security-verify-or-decrypt handle))))
8483
8484 (defun gnus-insert-mime-security-button (handle &optional displayed)
8485   (let* ((protocol (mm-handle-multipart-ctl-parameter handle 'protocol))
8486          (gnus-tmp-type
8487           (concat
8488            (or (nth 2 (assoc protocol mm-verify-function-alist))
8489                (nth 2 (assoc protocol mm-decrypt-function-alist))
8490                "Unknown")
8491            (if (equal (car handle) "multipart/signed")
8492                " Signed" " Encrypted")
8493            " Part"))
8494          (gnus-tmp-info
8495           (or (mm-handle-multipart-ctl-parameter handle 'gnus-info)
8496               "Undecided"))
8497          (gnus-tmp-details
8498           (mm-handle-multipart-ctl-parameter handle 'gnus-details))
8499          gnus-tmp-pressed-details
8500          b e)
8501     (setq gnus-tmp-details
8502           (if gnus-tmp-details
8503               (concat "\n" gnus-tmp-details)
8504             ""))
8505     (setq gnus-tmp-pressed-details
8506           (if gnus-mime-security-button-pressed gnus-tmp-details ""))
8507     (unless (bolp)
8508       (insert "\n"))
8509     (setq b (point))
8510     (gnus-eval-format
8511      gnus-mime-security-button-line-format
8512      gnus-mime-security-button-line-format-alist
8513      `(keymap ,gnus-mime-security-button-map
8514          gnus-callback gnus-mime-security-press-button
8515          gnus-line-format ,gnus-mime-security-button-line-format
8516          gnus-mime-details ,gnus-mime-security-button-pressed
8517          article-type annotation
8518          gnus-data ,handle))
8519     (setq e (if (bolp)
8520                 ;; Exclude a newline.
8521                 (1- (point))
8522               (point)))
8523     (when gnus-article-button-face
8524       (gnus-overlay-put (gnus-make-overlay b e nil t)
8525                         'face gnus-article-button-face))
8526     (widget-convert-button
8527      'link b e
8528      :mime-handle handle
8529      :action 'gnus-widget-press-button
8530      :button-keymap gnus-mime-security-button-map
8531      :help-echo
8532      (lambda (widget/window &optional overlay pos)
8533        ;; Needed to properly clear the message due to a bug in
8534        ;; wid-edit (XEmacs only).
8535        (when (boundp 'help-echo-owns-message)
8536          (setq help-echo-owns-message t))
8537        (format
8538         "%S: show detail; %S: more options"
8539         (aref gnus-mouse-2 0)
8540         (aref gnus-down-mouse-3 0))))))
8541
8542 (defun gnus-mime-display-security (handle)
8543   (save-restriction
8544     (narrow-to-region (point) (point))
8545     (unless (gnus-unbuttonized-mime-type-p (car handle))
8546       (gnus-insert-mime-security-button handle))
8547     (gnus-mime-display-part (cadr handle))
8548     (unless (bolp)
8549       (insert "\n"))
8550     (unless (gnus-unbuttonized-mime-type-p (car handle))
8551       (let ((gnus-mime-security-button-line-format
8552              gnus-mime-security-button-end-line-format))
8553         (gnus-insert-mime-security-button handle)))
8554     (mm-set-handle-multipart-parameter
8555      handle 'gnus-region
8556      (cons (set-marker (make-marker) (point-min))
8557            (set-marker (make-marker) (point-max))))
8558     (goto-char (point-max))))
8559
8560 (defun gnus-mime-security-run-function (function)
8561   "Run FUNCTION with the security part under point."
8562   (gnus-article-check-buffer)
8563   (let ((data (get-text-property (point) 'gnus-data))
8564         buffer handle)
8565     (when (and (stringp (car-safe data))
8566                (setq buffer (mm-handle-multipart-original-buffer data))
8567                (setq handle (cadr data)))
8568       (if (bufferp (mm-handle-buffer handle))
8569           (progn
8570             (setq handle (cons buffer (copy-sequence (cdr handle))))
8571             (mm-handle-set-undisplayer handle nil))
8572         (setq handle (mm-make-handle
8573                       buffer
8574                       (mm-handle-multipart-ctl-parameter handle 'protocol)
8575                       nil nil nil nil nil nil)))
8576       (funcall function handle))))
8577
8578 (defun gnus-mime-security-save-part ()
8579   "Save the security part under point."
8580   (interactive)
8581   (gnus-mime-security-run-function 'mm-save-part))
8582
8583 (defun gnus-mime-security-pipe-part ()
8584   "Pipe the security part under point to a process."
8585   (interactive)
8586   (gnus-mime-security-run-function 'mm-pipe-part))
8587
8588 (gnus-ems-redefine)
8589
8590 (provide 'gnus-art)
8591
8592 (run-hooks 'gnus-art-load-hook)
8593
8594 ;; arch-tag: 2654516f-6279-48f9-a83b-05c1fa450c33
8595 ;;; gnus-art.el ends here