lisp/gnus/gnus-art.el

   1 ;;; gnus-art.el --- article mode commands for Gnus
   2
   3 ;; Copyright (C) 1996-2014 Free Software Foundation, Inc.
   4
   5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   6 ;; Keywords: news
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 (eval-when-compile
  28   (require 'cl))
  29 (defvar tool-bar-map)
  30 (defvar w3m-minor-mode-map)
  31
  32 (require 'gnus)
  33 (require 'gnus-sum)
  34 (require 'gnus-spec)
  35 (require 'gnus-int)
  36 (require 'gnus-win)
  37 (require 'mm-bodies)
  38 (require 'mail-parse)
  39 (require 'mm-decode)
  40 (require 'mm-view)
  41 (require 'wid-edit)
  42 (require 'mm-uu)
  43 (require 'message)
  44 (require 'mouse)
  45
  46 (autoload 'gnus-msg-mail "gnus-msg" nil t)
  47 (autoload 'gnus-button-mailto "gnus-msg")
  48 (autoload 'gnus-button-reply "gnus-msg" nil t)
  49 (autoload 'parse-time-string "parse-time" nil nil)
  50 (autoload 'ansi-color-apply-on-region "ansi-color")
  51 (autoload 'mm-url-insert-file-contents-external "mm-url")
  52 (autoload 'mm-extern-cache-contents "mm-extern")
  53
  54 (defgroup gnus-article nil
  55   "Article display."
  56   :link '(custom-manual "(gnus)Article Buffer")
  57   :group 'gnus)
  58
  59 (defgroup gnus-article-treat nil
  60   "Treating article parts."
  61   :link '(custom-manual "(gnus)Article Hiding")
  62   :group 'gnus-article)
  63
  64 (defgroup gnus-article-hiding nil
  65   "Hiding article parts."
  66   :link '(custom-manual "(gnus)Article Hiding")
  67   :group 'gnus-article)
  68
  69 (defgroup gnus-article-highlight nil
  70   "Article highlighting."
  71   :link '(custom-manual "(gnus)Article Highlighting")
  72   :group 'gnus-article
  73   :group 'gnus-visual)
  74
  75 (defgroup gnus-article-signature nil
  76   "Article signatures."
  77   :link '(custom-manual "(gnus)Article Signature")
  78   :group 'gnus-article)
  79
  80 (defgroup gnus-article-headers nil
  81   "Article headers."
  82   :link '(custom-manual "(gnus)Hiding Headers")
  83   :group 'gnus-article)
  84
  85 (defgroup gnus-article-washing nil
  86   "Special commands on articles."
  87   :link '(custom-manual "(gnus)Article Washing")
  88   :group 'gnus-article)
  89
  90 (defgroup gnus-article-emphasis nil
  91   "Fontisizing articles."
  92   :link '(custom-manual "(gnus)Article Fontisizing")
  93   :group 'gnus-article)
  94
  95 (defgroup gnus-article-saving nil
  96   "Saving articles."
  97   :link '(custom-manual "(gnus)Saving Articles")
  98   :group 'gnus-article)
  99
 100 (defgroup gnus-article-mime nil
 101   "Worshiping the MIME wonder."
 102   :link '(custom-manual "(gnus)Using MIME")
 103   :group 'gnus-article)
 104
 105 (defgroup gnus-article-buttons nil
 106   "Pushable buttons in the article buffer."
 107   :link '(custom-manual "(gnus)Article Buttons")
 108   :group 'gnus-article)
 109
 110 (defgroup gnus-article-various nil
 111   "Other article options."
 112   :link '(custom-manual "(gnus)Misc Article")
 113   :group 'gnus-article)
 114
 115 (defcustom gnus-ignored-headers
 116   (mapcar
 117    (lambda (header)
 118      (concat "^" header ":"))
 119    '("Path" "Expires" "Date-Received" "References" "Xref" "Lines"
 120      "Relay-Version" "Message-ID" "Approved" "Sender" "Received"
 121      "X-UIDL" "MIME-Version" "Return-Path" "In-Reply-To"
 122      "Content-Type" "Content-Transfer-Encoding" "X-WebTV-Signature"
 123      "X-MimeOLE" "X-MSMail-Priority" "X-Priority" "X-Loop"
 124      "X-Authentication-Warning" "X-MIME-Autoconverted" "X-Face"
 125      "X-Attribution" "X-Originating-IP" "Delivered-To"
 126      "NNTP-[-A-Za-z]+" "Distribution" "X-no-archive" "X-Trace"
 127      "X-Complaints-To" "X-NNTP-Posting-Host" "X-Orig.*"
 128      "Abuse-Reports-To" "Cache-Post-Path" "X-Article-Creation-Date"
 129      "X-Poster" "X-Mail2News-Path" "X-Server-Date" "X-Cache"
 130      "Originator" "X-Problems-To" "X-Auth-User" "X-Post-Time"
 131      "X-Admin" "X-UID" "Resent-[-A-Za-z]+" "X-Mailing-List"
 132      "Precedence" "Original-[-A-Za-z]+" "X-filename" "X-Orcpt"
 133      "Old-Received" "X-Pgp" "X-Auth" "X-From-Line"
 134      "X-Gnus-Article-Number" "X-Majordomo" "X-Url" "X-Sender"
 135      "MBOX-Line" "Priority" "X400-[-A-Za-z]+"
 136      "Status" "X-Gnus-Mail-Source" "Cancel-Lock"
 137      "X-FTN" "X-EXP32-SerialNo" "Encoding" "Importance"
 138      "Autoforwarded" "Original-Encoded-Information-Types" "X-Ya-Pop3"
 139      "X-Face-Version" "X-Vms-To" "X-ML-NAME" "X-ML-COUNT"
 140      "Mailing-List" "X-finfo" "X-md5sum" "X-md5sum-Origin"
 141      "X-Sun-Charset" "X-Accept-Language" "X-Envelope-Sender"
 142      "List-[A-Za-z]+" "X-Listprocessor-Version"
 143      "X-Received" "X-Distribute" "X-Sequence" "X-Juno-Line-Breaks"
 144      "X-Notes-Item" "X-MS-TNEF-Correlator" "x-uunet-gateway"
 145      "X-Received" "Content-length" "X-precedence"
 146      "X-Authenticated-User" "X-Comment" "X-Report" "X-Abuse-Info"
 147      "X-HTTP-Proxy" "X-Mydeja-Info" "X-Copyright" "X-No-Markup"
 148      "X-Abuse-Info" "X-From_" "X-Accept-Language" "Errors-To"
 149      "X-BeenThere" "X-Mailman-Version" "List-Help" "List-Post"
 150      "List-Subscribe" "List-Id" "List-Unsubscribe" "List-Archive"
 151      "X-Content-length" "X-Posting-Agent" "Original-Received"
 152      "X-Request-PGP" "X-Fingerprint" "X-WRIEnvto" "X-WRIEnvfrom"
 153      "X-Virus-Scanned" "X-Delivery-Agent" "Posted-Date" "X-Gateway"
 154      "X-Local-Origin" "X-Local-Destination" "X-UserInfo1"
 155      "X-Received-Date" "X-Hashcash" "Face" "X-DMCA-Notifications"
 156      "X-Abuse-and-DMCA-Info" "X-Postfilter" "X-Gpg-.*" "X-Disclaimer"
 157      "Envelope-To" "X-Spam-Score" "System-Type" "X-Injected-Via-Gmane"
 158      "X-Gmane-NNTP-Posting-Host" "Jabber-ID" "Archived-At"
 159      "Envelope-Sender" "Envelope-Recipients"))
 160   "*All headers that start with this regexp will be hidden.
 161 This variable can also be a list of regexps of headers to be ignored.
 162 If `gnus-visible-headers' is non-nil, this variable will be ignored."
 163   :type '(choice regexp
 164                  (repeat regexp))
 165   :group 'gnus-article-hiding)
 166
 167 (defcustom gnus-visible-headers
 168   "^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:"
 169   "*All headers that do not match this regexp will be hidden.
 170 This variable can also be a list of regexp of headers to remain visible.
 171 If this variable is non-nil, `gnus-ignored-headers' will be ignored."
 172   :type '(choice
 173           (repeat :value-to-internal (lambda (widget value)
 174                                        (custom-split-regexp-maybe value))
 175                   :match (lambda (widget value)
 176                            (or (stringp value)
 177                                (widget-editable-list-match widget value)))
 178                   regexp)
 179           (const :tag "Use gnus-ignored-headers" nil)
 180           regexp)
 181   :group 'gnus-article-hiding)
 182
 183 (defcustom gnus-sorted-header-list
 184   '("^From:" "^Subject:" "^Summary:" "^Keywords:" "^Newsgroups:"
 185     "^Followup-To:" "^To:" "^Cc:" "^Date:" "^Organization:")
 186   "*This variable is a list of regular expressions.
 187 If it is non-nil, headers that match the regular expressions will
 188 be placed first in the article buffer in the sequence specified by
 189 this list."
 190   :type '(repeat regexp)
 191   :group 'gnus-article-hiding)
 192
 193 (defcustom gnus-boring-article-headers '(empty followup-to reply-to)
 194   "Headers that are only to be displayed if they have interesting data.
 195 Possible values in this list are:
 196
 197   'empty       Headers with no content.
 198   'newsgroups  Newsgroup identical to Gnus group.
 199   'to-address  To identical to To-address.
 200   'to-list     To identical to To-list.
 201   'cc-list     CC identical to To-list.
 202   'followup-to Followup-to identical to Newsgroups.
 203   'reply-to    Reply-to identical to From.
 204   'date        Date less than four days old.
 205   'long-to     To and/or Cc longer than 1024 characters.
 206   'many-to     Multiple To and/or Cc."
 207   :type '(set (const :tag "Headers with no content." empty)
 208               (const :tag "Newsgroups identical to Gnus group." newsgroups)
 209               (const :tag "To identical to To-address." to-address)
 210               (const :tag "To identical to To-list." to-list)
 211               (const :tag "CC identical to To-list." cc-list)
 212               (const :tag "Followup-to identical to Newsgroups." followup-to)
 213               (const :tag "Reply-to identical to From." reply-to)
 214               (const :tag "Date less than four days old." date)
 215               (const :tag "To and/or Cc longer than 1024 characters." long-to)
 216               (const :tag "Multiple To and/or Cc headers." many-to))
 217   :group 'gnus-article-hiding)
 218
 219 (defcustom gnus-article-skip-boring nil
 220   "Skip over text that is not worth reading.
 221 By default, if you set this t, then Gnus will display citations and
 222 signatures, but will never scroll down to show you a page consisting
 223 only of boring text.  Boring text is controlled by
 224 `gnus-article-boring-faces'."
 225   :version "22.1"
 226   :type 'boolean
 227   :group 'gnus-article-hiding)
 228
 229 (defcustom gnus-signature-separator '("^-- $" "^-- *$")
 230   "Regexp matching signature separator.
 231 This can also be a list of regexps.  In that case, it will be checked
 232 from head to tail looking for a separator.  Searches will be done from
 233 the end of the buffer."
 234   :type '(choice :format "%{%t%}: %[Value Menu%]\n%v"
 235                  (regexp)
 236                  (repeat :tag "List of regexp" regexp))
 237   :group 'gnus-article-signature)
 238
 239 (defcustom gnus-signature-limit nil
 240   "Provide a limit to what is considered a signature.
 241 If it is a number, no signature may not be longer (in characters) than
 242 that number.  If it is a floating point number, no signature may be
 243 longer (in lines) than that number.  If it is a function, the function
 244 will be called without any parameters, and if it returns nil, there is
 245 no signature in the buffer.  If it is a string, it will be used as a
 246 regexp.  If it matches, the text in question is not a signature.
 247
 248 This can also be a list of the above values."
 249   :type '(choice (const nil)
 250                  (integer :value 200)
 251                  (number :value 4.0)
 252                  function
 253                  (regexp :value ".*"))
 254   :group 'gnus-article-signature)
 255
 256 (defcustom gnus-hidden-properties
 257   (if (featurep 'xemacs)
 258       ;; `intangible' is evil, but I keep it here in case it's useful.
 259       '(invisible t intangible t)
 260     ;; Emacs's command loop moves point out of invisible text anyway, so
 261     ;; `intangible' is clearly not needed there.
 262     '(invisible t))
 263   "Property list to use for hiding text."
 264   :type 'sexp
 265   :group 'gnus-article-hiding)
 266
 267 ;; Fixme: This isn't the right thing for mixed graphical and non-graphical
 268 ;; frames in a session.
 269 (defcustom gnus-article-x-face-command
 270   (if (featurep 'xemacs)
 271       (if (or (gnus-image-type-available-p 'xface)
 272               (gnus-image-type-available-p 'pbm))
 273           'gnus-display-x-face-in-from
 274         "{ echo \
 275 '/* Format_version=1, Width=48, Height=48, Depth=1, Valid_bits_per_item=16 */'\
 276 ; uncompface; } | icontopbm | ee -")
 277     (if (gnus-image-type-available-p 'pbm)
 278         'gnus-display-x-face-in-from
 279       "{ echo \
 280 '/* Format_version=1, Width=48, Height=48, Depth=1, Valid_bits_per_item=16 */'\
 281 ; uncompface; } | icontopbm | display -"))
 282   "*String or function to be executed to display an X-Face header.
 283 If it is a string, the command will be executed in a sub-shell
 284 asynchronously.  The compressed face will be piped to this command."
 285   :type `(choice string
 286                  (function-item gnus-display-x-face-in-from)
 287                  function)
 288   :version "21.1"
 289   :group 'gnus-picon
 290   :group 'gnus-article-washing)
 291
 292 (defcustom gnus-article-x-face-too-ugly nil
 293   "Regexp matching posters whose face shouldn't be shown automatically."
 294   :type '(choice regexp (const nil))
 295   :group 'gnus-article-washing)
 296
 297 (defcustom gnus-article-banner-alist nil
 298   "Banner alist for stripping.
 299 For example,
 300      ((egroups . \"^[ \\t\\n]*-------------------+\\\\( \\\\(e\\\\|Yahoo! \\\\)Groups Sponsor -+\\\\)?....\\n\\\\(.+\\n\\\\)+\"))"
 301   :version "21.1"
 302   :type '(repeat (cons symbol regexp))
 303   :group 'gnus-article-washing)
 304
 305 (gnus-define-group-parameter
 306  banner
 307  :variable-document
 308  "Alist of regexps (to match group names) and banner."
 309  :variable-group gnus-article-washing
 310  :parameter-type
 311  '(choice :tag "Banner"
 312           :value nil
 313           (const :tag "Remove signature" signature)
 314           (symbol :tag "Item in `gnus-article-banner-alist'" none)
 315           regexp
 316           (const :tag "None" nil))
 317  :parameter-document
 318  "If non-nil, specify how to remove `banners' from articles.
 319
 320 Symbol `signature' means to remove signatures delimited by
 321 `gnus-signature-separator'.  Any other symbol is used to look up a
 322 regular expression to match the banner in `gnus-article-banner-alist'.
 323 A string is used as a regular expression to match the banner
 324 directly.")
 325
 326 (defcustom gnus-article-address-banner-alist nil
 327   "Alist of mail addresses and banners.
 328 Each element has the form (ADDRESS . BANNER), where ADDRESS is a regexp
 329 to match a mail address in the From: header, BANNER is one of a symbol
 330 `signature', an item in `gnus-article-banner-alist', a regexp and nil.
 331 If ADDRESS matches author's mail address, it will remove things like
 332 advertisements.  For example:
 333
 334 \((\"@yoo-hoo\\\\.co\\\\.jp\\\\'\" . \"\\n_+\\nDo You Yoo-hoo!\\\\?\\n.*\\n.*\\n\"))
 335 "
 336   :type '(repeat
 337           (cons
 338            (regexp :tag "Address")
 339            (choice :tag "Banner" :value nil
 340                    (const :tag "Remove signature" signature)
 341                    (symbol :tag "Item in `gnus-article-banner-alist'" none)
 342                    regexp
 343                    (const :tag "None" nil))))
 344   :version "22.1"
 345   :group 'gnus-article-washing)
 346
 347 (defmacro gnus-emphasis-custom-with-format (&rest body)
 348   `(let ((format "\
 349 \\(\\s-\\|^\\|\\=\\|[-\"]\\|\\s(\\)\\(%s\\(\\w+\\(\\s-+\\w+\\)*[.,]?\\)%s\\)\
 350 \\(\\([-,.;:!?\"]\\|\\s)\\)+\\s-\\|[?!.]\\s-\\|\\s)\\|\\s-\\)"))
 351      ,@body))
 352
 353 (defun gnus-emphasis-custom-value-to-external (value)
 354   (gnus-emphasis-custom-with-format
 355    (if (consp (car value))
 356        (list (format format (car (car value)) (cdr (car value)))
 357              2
 358              (if (nth 1 value) 2 3)
 359              (nth 2 value))
 360      value)))
 361
 362 (defun gnus-emphasis-custom-value-to-internal (value)
 363   (gnus-emphasis-custom-with-format
 364    (let ((regexp (concat "\\`"
 365                          (format (regexp-quote format)
 366                                  "\\([^()]+\\)" "\\([^()]+\\)")
 367                          "\\'"))
 368          pattern)
 369      (if (string-match regexp (setq pattern (car value)))
 370          (list (cons (match-string 1 pattern) (match-string 2 pattern))
 371                (= (nth 2 value) 2)
 372                (nth 3 value))
 373        value))))
 374
 375 (defcustom gnus-emphasis-alist
 376   (let ((types
 377          '(("\\*" "\\*" bold nil 2)
 378            ("_" "_" underline)
 379            ("/" "/" italic)
 380            ("_/" "/_" underline-italic)
 381            ("_\\*" "\\*_" underline-bold)
 382            ("\\*/" "/\\*" bold-italic)
 383            ("_\\*/" "/\\*_" underline-bold-italic))))
 384     (nconc
 385      (gnus-emphasis-custom-with-format
 386       (mapcar (lambda (spec)
 387                 (list (format format (car spec) (cadr spec))
 388                       (or (nth 3 spec) 2)
 389                       (or (nth 4 spec) 3)
 390                       (intern (format "gnus-emphasis-%s" (nth 2 spec)))))
 391               types))
 392      '(;; I've never seen anyone use this strikethru convention whereas I've
 393        ;; several times seen it triggered by normal text.  --Stef
 394        ;; Miles suggests that this form is sometimes used but for italics,
 395        ;; so maybe we should map it to `italic'.
 396        ;; ("\\(\\s-\\|^\\)\\(-\\(\\(\\w\\|-[^-]\\)+\\)-\\)\\(\\s-\\|[?!.,;]\\)"
 397        ;; 2 3 gnus-emphasis-strikethru)
 398        ("\\(\\s-\\|^\\)\\(_\\(\\(\\w\\|_[^_]\\)+\\)_\\)\\(\\s-\\|[?!.,;]\\)"
 399         2 3 gnus-emphasis-underline))))
 400   "*Alist that says how to fontify certain phrases.
 401 Each item looks like this:
 402
 403   (\"_\\\\(\\\\w+\\\\)_\" 0 1 'underline)
 404
 405 The first element is a regular expression to be matched.  The second
 406 is a number that says what regular expression grouping used to find
 407 the entire emphasized word.  The third is a number that says what
 408 regexp grouping should be displayed and highlighted.  The fourth
 409 is the face used for highlighting."
 410   :type
 411   '(repeat
 412     (menu-choice
 413      :format "%[Customizing Style%]\n%v"
 414      :indent 2
 415      (group :tag "Default"
 416             :value ("" 0 0 default)
 417             :value-create
 418             (lambda (widget)
 419               (let ((value (widget-get
 420                             (cadr (widget-get (widget-get widget :parent)
 421                                               :args))
 422                             :value)))
 423                 (if (not (eq (nth 2 value) 'default))
 424                     (widget-put
 425                      widget
 426                      :value
 427                      (gnus-emphasis-custom-value-to-external value))))
 428               (widget-group-value-create widget))
 429             regexp
 430             (integer :format "Match group: %v")
 431             (integer :format "Emphasize group: %v")
 432             face)
 433      (group :tag "Simple"
 434             :value (("_" . "_") nil default)
 435             (cons :format "%v"
 436                   (regexp :format "Start regexp: %v")
 437                   (regexp :format "End regexp: %v"))
 438             (boolean :format "Show start and end patterns: %[%v%]\n"
 439                      :on " On " :off " Off ")
 440             face)))
 441   :get (lambda (symbol)
 442          (mapcar 'gnus-emphasis-custom-value-to-internal
 443                  (default-value symbol)))
 444   :set (lambda (symbol value)
 445          (set-default symbol (mapcar 'gnus-emphasis-custom-value-to-external
 446                                      value)))
 447   :group 'gnus-article-emphasis)
 448
 449 (defcustom gnus-emphasize-whitespace-regexp "^[ \t]+\\|[ \t]*\n"
 450   "A regexp to describe whitespace which should not be emphasized.
 451 Typical values are \"^[ \\t]+\\\\|[ \\t]*\\n\" and \"[ \\t]+\\\\|[ \\t]*\\n\".
 452 The former avoids underlining of leading and trailing whitespace,
 453 and the latter avoids underlining any whitespace at all."
 454   :version "21.1"
 455   :group 'gnus-article-emphasis
 456   :type 'regexp)
 457
 458 (defface gnus-emphasis-bold '((t (:bold t)))
 459   "Face used for displaying strong emphasized text (*word*)."
 460   :group 'gnus-article-emphasis)
 461
 462 (defface gnus-emphasis-italic '((t (:italic t)))
 463   "Face used for displaying italic emphasized text (/word/)."
 464   :group 'gnus-article-emphasis)
 465
 466 (defface gnus-emphasis-underline '((t (:underline t)))
 467   "Face used for displaying underlined emphasized text (_word_)."
 468   :group 'gnus-article-emphasis)
 469
 470 (defface gnus-emphasis-underline-bold '((t (:bold t :underline t)))
 471   "Face used for displaying underlined bold emphasized text (_*word*_)."
 472   :group 'gnus-article-emphasis)
 473
 474 (defface gnus-emphasis-underline-italic '((t (:italic t :underline t)))
 475   "Face used for displaying underlined italic emphasized text (_/word/_)."
 476   :group 'gnus-article-emphasis)
 477
 478 (defface gnus-emphasis-bold-italic '((t (:bold t :italic t)))
 479   "Face used for displaying bold italic emphasized text (/*word*/)."
 480   :group 'gnus-article-emphasis)
 481
 482 (defface gnus-emphasis-underline-bold-italic
 483   '((t (:bold t :italic t :underline t)))
 484   "Face used for displaying underlined bold italic emphasized text.
 485 Example: (_/*word*/_)."
 486   :group 'gnus-article-emphasis)
 487
 488 (defface gnus-emphasis-strikethru (if (featurep 'xemacs)
 489                                       '((t (:strikethru t)))
 490                                     '((t (:strike-through t))))
 491   "Face used for displaying strike-through text (-word-)."
 492   :group 'gnus-article-emphasis)
 493
 494 (defface gnus-emphasis-highlight-words
 495   '((t (:background "black" :foreground "yellow")))
 496   "Face used for displaying highlighted words."
 497   :group 'gnus-article-emphasis)
 498
 499 (defcustom gnus-article-time-format "%a, %d %b %Y %T %Z"
 500   "Format for display of Date headers in article bodies.
 501 See `format-time-string' for the possible values.
 502
 503 The variable can also be function, which should return a complete Date
 504 header.  The function is called with one argument, the time, which can
 505 be fed to `format-time-string'."
 506   :type '(choice string function)
 507   :link '(custom-manual "(gnus)Article Date")
 508   :group 'gnus-article-washing)
 509
 510 (defcustom gnus-save-all-headers t
 511   "*If non-nil, don't remove any headers before saving.
 512 This will be overridden by the `:headers' property that the symbol of
 513 the saver function, which is specified by `gnus-default-article-saver',
 514 might have."
 515   :group 'gnus-article-saving
 516   :type 'boolean)
 517
 518 (defcustom gnus-prompt-before-saving 'always
 519   "*This variable says how much prompting is to be done when saving articles.
 520 If it is nil, no prompting will be done, and the articles will be
 521 saved to the default files.  If this variable is `always', each and
 522 every article that is saved will be preceded by a prompt, even when
 523 saving large batches of articles.  If this variable is neither nil not
 524 `always', there the user will be prompted once for a file name for
 525 each invocation of the saving commands."
 526   :group 'gnus-article-saving
 527   :type '(choice (item always)
 528                  (item :tag "never" nil)
 529                  (sexp :tag "once" :format "%t\n" :value t)))
 530
 531 (defcustom gnus-saved-headers gnus-visible-headers
 532   "Headers to keep if `gnus-save-all-headers' is nil.
 533 If `gnus-save-all-headers' is non-nil, this variable will be ignored.
 534 If that variable is nil, however, all headers that match this regexp
 535 will be kept while the rest will be deleted before saving.  This and
 536 `gnus-save-all-headers' will be overridden by the `:headers' property
 537 that the symbol of the saver function, which is specified by
 538 `gnus-default-article-saver', might have."
 539   :group 'gnus-article-saving
 540   :type 'regexp)
 541
 542 ;; Note that "Rmail format" is mbox since Emacs 23, but Babyl before.
 543 (defcustom gnus-default-article-saver 'gnus-summary-save-in-rmail
 544   "A function to save articles in your favorite format.
 545 The function will be called by way of the `gnus-summary-save-article'
 546 command, and friends such as `gnus-summary-save-article-rmail'.
 547
 548 Gnus provides the following functions:
 549
 550 * gnus-summary-save-in-rmail (Rmail format)
 551 * gnus-summary-save-in-mail (Unix mail format)
 552 * gnus-summary-save-in-folder (MH folder)
 553 * gnus-summary-save-in-file (article format)
 554 * gnus-summary-save-body-in-file (article body)
 555 * gnus-summary-save-in-vm (use VM's folder format)
 556 * gnus-summary-write-to-file (article format -- overwrite)
 557 * gnus-summary-write-body-to-file (article body -- overwrite)
 558 * gnus-summary-save-in-pipe (article format)
 559
 560 The symbol of each function may have the following properties:
 561
 562 * :decode
 563 The value non-nil means save decoded articles.  This is meaningful
 564 only with `gnus-summary-save-in-file', `gnus-summary-save-body-in-file',
 565 `gnus-summary-write-to-file', `gnus-summary-write-body-to-file', and
 566 `gnus-summary-save-in-pipe'.
 567
 568 * :function
 569 The value specifies an alternative function which appends, not
 570 overwrites, articles to a file.  This implies that when saving many
 571 articles at a time, `gnus-prompt-before-saving' is bound to t and all
 572 articles are saved in a single file.  This is meaningful only with
 573 `gnus-summary-write-to-file' and `gnus-summary-write-body-to-file'.
 574
 575 * :headers
 576 The value specifies the symbol of a variable of which the value
 577 specifies headers to be saved.  If it is omitted,
 578 `gnus-save-all-headers' and `gnus-saved-headers' control what
 579 headers should be saved."
 580   :group 'gnus-article-saving
 581   :type '(radio (function-item gnus-summary-save-in-rmail)
 582                 (function-item gnus-summary-save-in-mail)
 583                 (function-item gnus-summary-save-in-folder)
 584                 (function-item gnus-summary-save-in-file)
 585                 (function-item gnus-summary-save-body-in-file)
 586                 (function-item gnus-summary-save-in-vm)
 587                 (function-item gnus-summary-write-to-file)
 588                 (function-item gnus-summary-write-body-to-file)
 589                 (function-item gnus-summary-save-in-pipe)
 590                 (function)))
 591
 592 (defcustom gnus-article-save-coding-system
 593   (or (and (mm-coding-system-p 'utf-8) 'utf-8)
 594       (and (mm-coding-system-p 'iso-2022-7bit) 'iso-2022-7bit)
 595       (and (mm-coding-system-p 'emacs-mule) 'emacs-mule)
 596       (and (mm-coding-system-p 'escape-quoted) 'escape-quoted))
 597   "Coding system used to save decoded articles to a file.
 598
 599 The recommended coding systems are `utf-8', `iso-2022-7bit' and so on,
 600 which can safely encode any characters in text.  This is used by the
 601 commands including:
 602
 603 * gnus-summary-save-article-file
 604 * gnus-summary-save-article-body-file
 605 * gnus-summary-write-article-file
 606 * gnus-summary-write-article-body-file
 607
 608 and the functions to which you may set `gnus-default-article-saver':
 609
 610 * gnus-summary-save-in-file
 611 * gnus-summary-save-body-in-file
 612 * gnus-summary-write-to-file
 613 * gnus-summary-write-body-to-file
 614
 615 Those commands and functions save just text displayed in the article
 616 buffer to a file if the value of this variable is non-nil.  Note that
 617 buttonized MIME parts will be lost in a saved file in that case.
 618 Otherwise, raw articles will be saved."
 619   :group 'gnus-article-saving
 620   :type `(choice
 621           :format "%{%t%}:\n %[Value Menu%] %v"
 622           (const :tag "Save raw articles" nil)
 623           ,@(delq nil
 624                   (mapcar
 625                    (lambda (arg) (if (mm-coding-system-p (nth 3 arg)) arg))
 626                    '((const :tag "UTF-8" utf-8)
 627                      (const :tag "iso-2022-7bit" iso-2022-7bit)
 628                      (const :tag "Emacs internal" emacs-mule)
 629                      (const :tag "escape-quoted" escape-quoted))))
 630           (symbol :tag "Coding system")))
 631
 632 (defcustom gnus-rmail-save-name 'gnus-plain-save-name
 633   "A function generating a file name to save articles in Rmail format.
 634 The function is called with NEWSGROUP, HEADERS, and optional LAST-FILE."
 635   :group 'gnus-article-saving
 636   :type 'function)
 637
 638 (defcustom gnus-mail-save-name 'gnus-plain-save-name
 639   "A function generating a file name to save articles in Unix mail format.
 640 The function is called with NEWSGROUP, HEADERS, and optional LAST-FILE."
 641   :group 'gnus-article-saving
 642   :type 'function)
 643
 644 (defcustom gnus-folder-save-name 'gnus-folder-save-name
 645   "A function generating a file name to save articles in MH folder.
 646 The function is called with NEWSGROUP, HEADERS, and optional LAST-FOLDER."
 647   :group 'gnus-article-saving
 648   :type 'function)
 649
 650 (defcustom gnus-file-save-name 'gnus-numeric-save-name
 651   "A function generating a file name to save articles in article format.
 652 The function is called with NEWSGROUP, HEADERS, and optional
 653 LAST-FILE."
 654   :group 'gnus-article-saving
 655   :type 'function)
 656
 657 (defcustom gnus-split-methods
 658   '((gnus-article-archive-name)
 659     (gnus-article-nndoc-name))
 660   "*Variable used to suggest where articles are to be saved.
 661 For instance, if you would like to save articles related to Gnus in
 662 the file \"gnus-stuff\", and articles related to VM in \"vm-stuff\",
 663 you could set this variable to something like:
 664
 665  '((\"^Subject:.*gnus\\|^Newsgroups:.*gnus\" \"gnus-stuff\")
 666    (\"^Subject:.*vm\\|^Xref:.*vm\" \"vm-stuff\"))
 667
 668 This variable is an alist where the key is the match and the
 669 value is a list of possible files to save in if the match is
 670 non-nil.
 671
 672 If the match is a string, it is used as a regexp match on the
 673 article.  If the match is a symbol, that symbol will be funcalled
 674 from the buffer of the article to be saved with the newsgroup as the
 675 parameter.  If it is a list, it will be evalled in the same buffer.
 676
 677 If this form or function returns a string, this string will be used as a
 678 possible file name; and if it returns a non-nil list, that list will be
 679 used as possible file names."
 680   :group 'gnus-article-saving
 681   :type '(repeat (choice (list :value (fun) function)
 682                          (cons :value ("" "") regexp (repeat string))
 683                          (sexp :value nil))))
 684
 685 (defcustom gnus-page-delimiter "^\^L"
 686   "*Regexp describing what to use as article page delimiters.
 687 The default value is \"^\^L\", which is a form linefeed at the
 688 beginning of a line."
 689   :type 'regexp
 690   :group 'gnus-article-various)
 691
 692 (defcustom gnus-article-mode-line-format "Gnus: %g %S%m"
 693   "*The format specification for the article mode line.
 694 See `gnus-summary-mode-line-format' for a closer description.
 695
 696 The following additional specs are available:
 697
 698 %w  The article washing status.
 699 %m  The number of MIME parts in the article."
 700   :version "24.1"
 701   :type 'string
 702   :group 'gnus-article-various)
 703
 704 (defcustom gnus-article-mode-hook nil
 705   "*A hook for Gnus article mode."
 706   :type 'hook
 707   :group 'gnus-article-various)
 708
 709 (when (featurep 'xemacs)
 710   ;; Extracted from gnus-xmas-define in order to preserve user settings
 711   (when (fboundp 'turn-off-scroll-in-place)
 712     (add-hook 'gnus-article-mode-hook 'turn-off-scroll-in-place))
 713   ;; Extracted from gnus-xmas-redefine in order to preserve user settings
 714   (add-hook 'gnus-article-mode-hook 'gnus-xmas-article-menu-add))
 715
 716 (defcustom gnus-article-menu-hook nil
 717   "*Hook run after the creation of the article mode menu."
 718   :type 'hook
 719   :group 'gnus-article-various)
 720
 721 (defcustom gnus-article-prepare-hook nil
 722   "*A hook called after an article has been prepared in the article buffer."
 723   :type 'hook
 724   :group 'gnus-article-various)
 725
 726 (defcustom gnus-copy-article-ignored-headers nil
 727   "List of headers to be removed when copying an article.
 728 Each element is a regular expression."
 729   :version "23.1" ;; No Gnus
 730   :type '(repeat regexp)
 731   :group 'gnus-article-various)
 732
 733 (make-obsolete-variable 'gnus-article-hide-pgp-hook nil
 734                         "Gnus 5.10 (Emacs 22.1)")
 735
 736 (defface gnus-button
 737   '((t (:weight bold)))
 738   "Face used for highlighting a button in the article buffer."
 739   :group 'gnus-article-buttons)
 740
 741 (defcustom gnus-article-button-face 'gnus-button
 742   "Face used for highlighting buttons in the article buffer.
 743
 744 An article button is a piece of text that you can activate by pressing
 745 `RET' or `mouse-2' above it."
 746   :type 'face
 747   :group 'gnus-article-buttons)
 748
 749 (defcustom gnus-article-mouse-face 'highlight
 750   "Face used for mouse highlighting in the article buffer.
 751
 752 Article buttons will be displayed in this face when the cursor is
 753 above them."
 754   :type 'face
 755   :group 'gnus-article-buttons)
 756
 757 (defcustom gnus-signature-face 'gnus-signature
 758   "Face used for highlighting a signature in the article buffer.
 759 Obsolete; use the face `gnus-signature' for customizations instead."
 760   :type 'face
 761   :group 'gnus-article-highlight
 762   :group 'gnus-article-signature)
 763
 764 (defface gnus-signature
 765   '((t
 766      (:italic t)))
 767   "Face used for highlighting a signature in the article buffer."
 768   :group 'gnus-article-highlight
 769   :group 'gnus-article-signature)
 770 ;; backward-compatibility alias
 771 (put 'gnus-signature-face 'face-alias 'gnus-signature)
 772 (put 'gnus-signature-face 'obsolete-face "22.1")
 773
 774 (defface gnus-header-from
 775   '((((class color)
 776       (background dark))
 777      (:foreground "PaleGreen1"))
 778     (((class color)
 779       (background light))
 780      (:foreground "red3"))
 781     (t
 782      (:italic t)))
 783   "Face used for displaying from headers."
 784   :group 'gnus-article-headers
 785   :group 'gnus-article-highlight)
 786 ;; backward-compatibility alias
 787 (put 'gnus-header-from-face 'face-alias 'gnus-header-from)
 788 (put 'gnus-header-from-face 'obsolete-face "22.1")
 789
 790 (defface gnus-header-subject
 791   '((((class color)
 792       (background dark))
 793      (:foreground "SeaGreen1"))
 794     (((class color)
 795       (background light))
 796      (:foreground "red4"))
 797     (t
 798      (:bold t :italic t)))
 799   "Face used for displaying subject headers."
 800   :group 'gnus-article-headers
 801   :group 'gnus-article-highlight)
 802 ;; backward-compatibility alias
 803 (put 'gnus-header-subject-face 'face-alias 'gnus-header-subject)
 804 (put 'gnus-header-subject-face 'obsolete-face "22.1")
 805
 806 (defface gnus-header-newsgroups
 807   '((((class color)
 808       (background dark))
 809      (:foreground "yellow" :italic t))
 810     (((class color)
 811       (background light))
 812      (:foreground "MidnightBlue" :italic t))
 813     (t
 814      (:italic t)))
 815   "Face used for displaying newsgroups headers.
 816 In the default setup this face is only used for crossposted
 817 articles."
 818   :group 'gnus-article-headers
 819   :group 'gnus-article-highlight)
 820 ;; backward-compatibility alias
 821 (put 'gnus-header-newsgroups-face 'face-alias 'gnus-header-newsgroups)
 822 (put 'gnus-header-newsgroups-face 'obsolete-face "22.1")
 823
 824 (defface gnus-header-name
 825   '((((class color)
 826       (background dark))
 827      (:foreground "SpringGreen2"))
 828     (((class color)
 829       (background light))
 830      (:foreground "maroon"))
 831     (t
 832      (:bold t)))
 833   "Face used for displaying header names."
 834   :group 'gnus-article-headers
 835   :group 'gnus-article-highlight)
 836 ;; backward-compatibility alias
 837 (put 'gnus-header-name-face 'face-alias 'gnus-header-name)
 838 (put 'gnus-header-name-face 'obsolete-face "22.1")
 839
 840 (defface gnus-header-content
 841   '((((class color)
 842       (background dark))
 843      (:foreground "SpringGreen1" :italic t))
 844     (((class color)
 845       (background light))
 846      (:foreground "indianred4" :italic t))
 847     (t
 848      (:italic t)))  "Face used for displaying header content."
 849   :group 'gnus-article-headers
 850   :group 'gnus-article-highlight)
 851 ;; backward-compatibility alias
 852 (put 'gnus-header-content-face 'face-alias 'gnus-header-content)
 853 (put 'gnus-header-content-face 'obsolete-face "22.1")
 854
 855 (defcustom gnus-header-face-alist
 856   '(("From" nil gnus-header-from)
 857     ("Subject" nil gnus-header-subject)
 858     ("Newsgroups:.*," nil gnus-header-newsgroups)
 859     ("" gnus-header-name gnus-header-content))
 860   "*Controls highlighting of article headers.
 861
 862 An alist of the form (HEADER NAME CONTENT).
 863
 864 HEADER is a regular expression which should match the name of a
 865 header and NAME and CONTENT are either face names or nil.
 866
 867 The name of each header field will be displayed using the face
 868 specified by the first element in the list where HEADER matches
 869 the header name and NAME is non-nil.  Similarly, the content will
 870 be displayed by the first non-nil matching CONTENT face."
 871   :group 'gnus-article-headers
 872   :group 'gnus-article-highlight
 873   :type '(repeat (list (regexp :tag "Header")
 874                        (choice :tag "Name"
 875                                (item :tag "skip" nil)
 876                                (face :value default))
 877                        (choice :tag "Content"
 878                                (item :tag "skip" nil)
 879                                (face :value default)))))
 880
 881 (defcustom gnus-face-properties-alist (if (featurep 'xemacs)
 882                                           '((xface . (:face gnus-x-face)))
 883                                         '((pbm . (:face gnus-x-face))
 884                                           (png . nil)))
 885   "Alist of image types and properties applied to Face and X-Face images.
 886 Here are examples:
 887
 888 ;; Specify the altitude of Face images in the From header.
 889 \(setq gnus-face-properties-alist
 890       '((pbm . (:face gnus-x-face :ascent 80))
 891         (png . (:ascent 80))))
 892
 893 ;; Show Face images as pressed buttons.
 894 \(setq gnus-face-properties-alist
 895       '((pbm . (:face gnus-x-face :relief -2))
 896         (png . (:relief -2))))
 897
 898 See the manual for the valid properties for various image types.
 899 Currently, `pbm' is used for X-Face images and `png' is used for Face
 900 images in Emacs.  Only the `:face' property is effective on the `xface'
 901 image type in XEmacs if it is built with the libcompface library."
 902   :version "23.1" ;; No Gnus
 903   :group 'gnus-article-headers
 904   :type '(repeat (cons :format "%v" (symbol :tag "Image type") plist)))
 905
 906 (defcustom gnus-article-decode-hook
 907   '(article-decode-charset article-decode-encoded-words
 908                            article-decode-group-name article-decode-idna-rhs)
 909   "*Hook run to decode charsets in articles."
 910   :group 'gnus-article-headers
 911   :type 'hook)
 912
 913 (defcustom gnus-display-mime-function 'gnus-display-mime
 914   "Function to display MIME articles."
 915   :group 'gnus-article-mime
 916   :type 'function)
 917
 918 (defvar gnus-decode-header-function 'mail-decode-encoded-word-region
 919   "Function used to decode headers.")
 920
 921 (defvar gnus-decode-address-function 'mail-decode-encoded-address-region
 922   "Function used to decode addresses.")
 923
 924 (defvar gnus-article-dumbquotes-map
 925   '((?\200 "EUR")
 926     (?\202 ",")
 927     (?\203 "f")
 928     (?\204 ",,")
 929     (?\205 "...")
 930     (?\213 "<")
 931     (?\214 "OE")
 932     (?\221 "`")
 933     (?\222 "'")
 934     (?\223 "``")
 935     (?\224 "\"")
 936     (?\225 "*")
 937     (?\226 "-")
 938     (?\227 "--")
 939     (?\230 "~")
 940     (?\231 "(TM)")
 941     (?\233 ">")
 942     (?\234 "oe")
 943     (?\264 "'"))
 944   "Table for MS-to-Latin1 translation.")
 945
 946 (defcustom gnus-ignored-mime-types nil
 947   "List of MIME types that should be ignored by Gnus."
 948   :version "21.1"
 949   :group 'gnus-article-mime
 950   :type '(repeat regexp))
 951
 952 (defcustom gnus-unbuttonized-mime-types '(".*/.*")
 953   "List of MIME types that should not be given buttons when rendered inline.
 954 See also `gnus-buttonized-mime-types' which may override this variable.
 955 This variable is only used when `gnus-inhibit-mime-unbuttonizing' is nil."
 956   :version "21.1"
 957   :group 'gnus-article-mime
 958   :type '(repeat regexp))
 959
 960 (defcustom gnus-buttonized-mime-types nil
 961   "List of MIME types that should be given buttons when rendered inline.
 962 If set, this variable overrides `gnus-unbuttonized-mime-types'.
 963 To see e.g. security buttons you could set this to
 964 `(\"multipart/signed\")'.  You could also add \"multipart/alternative\" to
 965 this list to display radio buttons that allow you to choose one of two
 966 media types those mails include.  See also `mm-discouraged-alternatives'.
 967 This variable is only used when `gnus-inhibit-mime-unbuttonizing' is nil."
 968   :version "22.1"
 969   :group 'gnus-article-mime
 970   :type '(repeat regexp))
 971
 972 (defcustom gnus-inhibit-mime-unbuttonizing nil
 973   "If non-nil, all MIME parts get buttons.
 974 When nil (the default value), then some MIME parts do not get buttons,
 975 as described by the variables `gnus-buttonized-mime-types' and
 976 `gnus-unbuttonized-mime-types'."
 977   :version "22.1"
 978   :group 'gnus-article-mime
 979   :type 'boolean)
 980
 981 (defcustom gnus-body-boundary-delimiter "_"
 982   "String used to delimit header and body.
 983 This variable is used by `gnus-article-treat-body-boundary' which can
 984 be controlled by `gnus-treat-body-boundary'."
 985   :version "22.1"
 986   :group 'gnus-article-various
 987   :type '(choice (item :tag "None" :value nil)
 988                  string))
 989
 990 (defcustom gnus-picon-databases '("/usr/lib/picon" "/usr/local/faces"
 991                                   "/usr/share/picons")
 992   "Defines the location of the faces database.
 993 For information on obtaining this database of pretty pictures, please
 994 see http://www.cs.indiana.edu/picons/ftp/index.html"
 995   :version "22.1"
 996   :type '(repeat directory)
 997   :link '(url-link :tag "download"
 998                    "http://www.cs.indiana.edu/picons/ftp/index.html")
 999   :link '(custom-manual "(gnus)Picons")
1000   :group 'gnus-picon)
1001
1002 (defun gnus-picons-installed-p ()
1003   "Say whether picons are installed on your machine."
1004   (let ((installed nil))
1005     (dolist (database gnus-picon-databases)
1006       (when (file-exists-p database)
1007         (setq installed t)))
1008     installed))
1009
1010 (defcustom gnus-article-mime-part-function nil
1011   "Function called with a MIME handle as the argument.
1012 This is meant for people who want to do something automatic based
1013 on parts -- for instance, adding Vcard info to a database."
1014   :group 'gnus-article-mime
1015   :type '(choice (const nil)
1016                  function))
1017
1018 (defcustom gnus-mime-multipart-functions nil
1019   "An alist of MIME types to functions to display them."
1020   :version "21.1"
1021   :group 'gnus-article-mime
1022   :type '(repeat (cons :format "%v" (string :tag "MIME type") function)))
1023
1024 (defcustom gnus-article-date-headers '(combined-lapsed)
1025   "A list of Date header formats to display.
1026 Valid formats are `ut' (universal time), `local' (local time
1027 zone), `english' (readable English), `lapsed' (elapsed time),
1028 `combined-lapsed' (both the original date and the elapsed time),
1029 `original' (the original date header), `iso8601' (ISO8601
1030 format), and `user-defined' (a user-defined format defined by the
1031 `gnus-article-time-format' variable).
1032
1033 You have as many date headers as you want in the article buffer.
1034 Some of these headers are updated automatically.  See
1035 `gnus-article-update-date-headers' for details."
1036   :version "24.1"
1037   :group 'gnus-article-headers
1038   :type '(set
1039           (const :tag "Universal time (UT)" ut)
1040           (const :tag "Local time zone" local)
1041           (const :tag "Readable English" english)
1042           (const :tag "Elapsed time" lapsed)
1043           (const :tag "Original and elapsed time" combined-lapsed)
1044           (const :tag "Original date header" original)
1045           (const :tag "ISO8601 format" iso8601)
1046           (const :tag "User-defined" user-defined)))
1047
1048 (defcustom gnus-article-update-date-headers nil
1049   "A number that says how often to update the date header (in seconds).
1050 If nil, don't update it at all."
1051   :version "24.1"
1052   :group 'gnus-article-headers
1053   :type '(choice
1054           (item :tag "Don't update" :value nil)
1055           integer))
1056
1057 (defcustom gnus-article-mime-match-handle-function 'undisplayed-alternative
1058   "Function called with a MIME handle as the argument.
1059 This is meant for people who want to view first matched part.
1060 For `undisplayed-alternative' (default), the first undisplayed
1061 part or alternative part is used.  For `undisplayed', the first
1062 undisplayed part is used.  For a function, the first part which
1063 the function return t is used.  For nil, the first part is
1064 used."
1065   :version "21.1"
1066   :group 'gnus-article-mime
1067   :type '(choice
1068           (item :tag "first" :value nil)
1069           (item :tag "undisplayed" :value undisplayed)
1070           (item :tag "undisplayed or alternative"
1071                 :value undisplayed-alternative)
1072           (function)))
1073
1074 (defcustom gnus-mime-action-alist
1075   '(("save to file" . gnus-mime-save-part)
1076     ("save and strip" . gnus-mime-save-part-and-strip)
1077     ("replace with file" . gnus-mime-replace-part)
1078     ("delete part" . gnus-mime-delete-part)
1079     ("display as text" . gnus-mime-inline-part)
1080     ("view the part" . gnus-mime-view-part)
1081     ("pipe to command" . gnus-mime-pipe-part)
1082     ("toggle display" . gnus-article-press-button)
1083     ("toggle display" . gnus-article-view-part-as-charset)
1084     ("view as type" . gnus-mime-view-part-as-type)
1085     ("view internally" . gnus-mime-view-part-internally)
1086     ("view externally" . gnus-mime-view-part-externally))
1087   "An alist of actions that run on the MIME attachment."
1088   :group 'gnus-article-mime
1089   :type '(repeat (cons (string :tag "name")
1090                        (function))))
1091
1092 (defcustom gnus-auto-select-part 1
1093   "Advance to next MIME part when deleting or stripping parts.
1094
1095 When 0, point will be placed on the same part as before.  When
1096 positive (negative), move point forward (backwards) this many
1097 parts.  When nil, redisplay article."
1098   :version "23.1" ;; No Gnus
1099   :group 'gnus-article-mime
1100   :type '(choice (const nil :tag "Redisplay article.")
1101                  (const 1 :tag "Next part.")
1102                  (const 0 :tag "Current part.")
1103                  integer))
1104
1105 ;;;
1106 ;;; The treatment variables
1107 ;;;
1108
1109 (defvar gnus-part-display-hook nil
1110   "Hook called on parts that are to receive treatment.")
1111
1112 (defvar gnus-article-treat-custom
1113   '(choice (const :tag "Off" nil)
1114            (const :tag "On" t)
1115            (const :tag "Header" head)
1116            (const :tag "First" first)
1117            (const :tag "Last" last)
1118            (integer :tag "Less")
1119            (repeat :tag "Groups" regexp)
1120            (sexp :tag "Predicate")))
1121
1122 (defvar gnus-article-treat-head-custom
1123   '(choice (const :tag "Off" nil)
1124            (const :tag "Header" head)))
1125
1126 (defvar gnus-article-treat-types '("text/plain" "text/x-verbatim"
1127                                    "text/x-patch" "text/html")
1128   "Part types eligible for treatment.")
1129
1130 (defvar gnus-inhibit-treatment nil
1131   "Whether to inhibit treatment.")
1132
1133 (defcustom gnus-treat-highlight-signature '(or t (typep "text/x-vcard"))
1134   "Highlight the signature.
1135 Valid values are nil, t, `head', `first', `last', an integer or a
1136 predicate.  See Info node `(gnus)Customizing Articles'."
1137   :group 'gnus-article-treat
1138   :link '(custom-manual "(gnus)Customizing Articles")
1139   :type gnus-article-treat-custom)
1140 (put 'gnus-treat-highlight-signature 'highlight t)
1141
1142 (defcustom gnus-treat-buttonize 100000
1143   "Add buttons.
1144 Valid values are nil, t, `head', `first', `last', an integer or a
1145 predicate.  See Info node `(gnus)Customizing Articles'."
1146   :group 'gnus-article-treat
1147   :link '(custom-manual "(gnus)Customizing Articles")
1148   :type gnus-article-treat-custom)
1149 (put 'gnus-treat-buttonize 'highlight t)
1150
1151 (defcustom gnus-treat-buttonize-head 'head
1152   "Add buttons to the head.
1153 Valid values are nil, t, `head', `first', `last', an integer or a
1154 predicate.  See Info node `(gnus)Customizing Articles'."
1155   :group 'gnus-article-treat
1156   :link '(custom-manual "(gnus)Customizing Articles")
1157   :type gnus-article-treat-head-custom)
1158 (put 'gnus-treat-buttonize-head 'highlight t)
1159
1160 (defcustom gnus-treat-date 'head
1161   "Display dates according to the `gnus-article-date-headers' variable.
1162 Valid values are nil, t, `head', `first', `last', an integer or a
1163 predicate.  See Info node `(gnus)Customizing Articles'."
1164   :version "24.1"
1165   :group 'gnus-article-treat
1166   :link '(custom-manual "(gnus)Customizing Articles")
1167   :type gnus-article-treat-head-custom)
1168
1169 (defcustom gnus-treat-emphasize 50000
1170   "Emphasize text.
1171 Valid values are nil, t, `head', `first', `last', an integer or a
1172 predicate.  See Info node `(gnus)Customizing Articles'."
1173   :group 'gnus-article-treat
1174   :link '(custom-manual "(gnus)Customizing Articles")
1175   :type gnus-article-treat-custom)
1176 (put 'gnus-treat-emphasize 'highlight t)
1177
1178 (defcustom gnus-treat-strip-cr nil
1179   "Remove carriage returns.
1180 Valid values are nil, t, `head', `first', `last', an integer or a
1181 predicate.  See Info node `(gnus)Customizing Articles'."
1182   :version "22.1"
1183   :group 'gnus-article-treat
1184   :link '(custom-manual "(gnus)Customizing Articles")
1185   :type gnus-article-treat-custom)
1186
1187 (defcustom gnus-treat-unsplit-urls nil
1188   "Remove newlines from within URLs.
1189 Valid values are nil, t, `head', `first', `last', an integer or a
1190 predicate.  See Info node `(gnus)Customizing Articles'."
1191   :version "22.1"
1192   :group 'gnus-article-treat
1193   :link '(custom-manual "(gnus)Customizing Articles")
1194   :type gnus-article-treat-custom)
1195
1196 (defcustom gnus-treat-leading-whitespace nil
1197   "Remove leading whitespace in headers.
1198 Valid values are nil, t, `head', `first', `last', an integer or a
1199 predicate.  See Info node `(gnus)Customizing Articles'."
1200   :version "22.1"
1201   :group 'gnus-article-treat
1202   :link '(custom-manual "(gnus)Customizing Articles")
1203   :type gnus-article-treat-custom)
1204
1205 (defcustom gnus-treat-hide-headers 'head
1206   "Hide headers.
1207 Valid values are nil, t, `head', `first', `last', an integer or a
1208 predicate.  See Info node `(gnus)Customizing Articles'."
1209   :group 'gnus-article-treat
1210   :link '(custom-manual "(gnus)Customizing Articles")
1211   :type gnus-article-treat-head-custom)
1212
1213 (defcustom gnus-treat-hide-boring-headers nil
1214   "Hide boring headers.
1215 Valid values are nil, t, `head', `first', `last', an integer or a
1216 predicate.  See Info node `(gnus)Customizing Articles'."
1217   :group 'gnus-article-treat
1218   :link '(custom-manual "(gnus)Customizing Articles")
1219   :type gnus-article-treat-head-custom)
1220
1221 (defcustom gnus-treat-hide-signature nil
1222   "Hide the signature.
1223 Valid values are nil, t, `head', `first', `last', an integer or a
1224 predicate.  See Info node `(gnus)Customizing Articles'."
1225   :group 'gnus-article-treat
1226   :link '(custom-manual "(gnus)Customizing Articles")
1227   :type gnus-article-treat-custom)
1228
1229 (defcustom gnus-treat-fill-article nil
1230   "Fill the article.
1231 Valid values are nil, t, `head', `first', `last', an integer or a
1232 predicate.  See Info node `(gnus)Customizing Articles'."
1233   :group 'gnus-article-treat
1234   :link '(custom-manual "(gnus)Customizing Articles")
1235   :type gnus-article-treat-custom)
1236
1237 (defcustom gnus-treat-hide-citation nil
1238   "Hide cited text.
1239 Valid values are nil, t, `head', `first', `last', an integer or a
1240 predicate.  See Info node `(gnus)Customizing Articles'.
1241
1242 See `gnus-article-highlight-citation' for variables used to
1243 control what it hides."
1244   :group 'gnus-article-treat
1245   :link '(custom-manual "(gnus)Customizing Articles")
1246   :type gnus-article-treat-custom)
1247
1248 (defcustom gnus-treat-hide-citation-maybe nil
1249   "Hide cited text according to certain conditions.
1250 Valid values are nil, t, `head', `first', `last', an integer or a
1251 predicate.  See Info node `(gnus)Customizing Articles'.
1252
1253 See `gnus-cite-hide-percentage' and `gnus-cite-hide-absolute' for
1254 how to control what it hides."
1255   :group 'gnus-article-treat
1256   :link '(custom-manual "(gnus)Customizing Articles")
1257   :type gnus-article-treat-custom)
1258
1259 (defcustom gnus-treat-strip-list-identifiers 'head
1260   "Strip list identifiers from `gnus-list-identifiers`.
1261 Valid values are nil, t, `head', `first', `last', an integer or a
1262 predicate.  See Info node `(gnus)Customizing Articles'."
1263   :version "21.1"
1264   :group 'gnus-article-treat
1265   :link '(custom-manual "(gnus)Customizing Articles")
1266   :type gnus-article-treat-custom)
1267
1268 (gnus-define-group-parameter
1269  list-identifier
1270  :variable-document
1271  "Alist of regexps and correspondent identifiers."
1272  :variable-group gnus-article-washing
1273  :parameter-type
1274  '(choice :tag "Identifier"
1275           :value nil
1276           (symbol :tag "Item in `gnus-list-identifiers'" none)
1277           regexp
1278           (const :tag "None" nil))
1279  :parameter-document
1280  "If non-nil, specify how to remove `identifiers' from articles' subject.
1281
1282 Any symbol is used to look up a regular expression to match the
1283 banner in `gnus-list-identifiers'.  A string is used as a regular
1284 expression to match the identifier directly.")
1285
1286 (make-obsolete-variable 'gnus-treat-strip-pgp nil
1287                         "Gnus 5.10 (Emacs 22.1)")
1288
1289 (defcustom gnus-treat-strip-pem nil
1290   "Strip PEM signatures.
1291 Valid values are nil, t, `head', `first', `last', an integer or a
1292 predicate.  See Info node `(gnus)Customizing Articles'."
1293   :group 'gnus-article-treat
1294   :link '(custom-manual "(gnus)Customizing Articles")
1295   :type gnus-article-treat-custom)
1296
1297 (defcustom gnus-treat-strip-banner t
1298   "Strip banners from articles.
1299 The banner to be stripped is specified in the `banner' group parameter.
1300 Valid values are nil, t, `head', `first', `last', an integer or a
1301 predicate.  See Info node `(gnus)Customizing Articles'."
1302   :group 'gnus-article-treat
1303   :link '(custom-manual "(gnus)Customizing Articles")
1304   :type gnus-article-treat-custom)
1305
1306 (defcustom gnus-treat-highlight-headers 'head
1307   "Highlight the headers.
1308 Valid values are nil, t, `head', `first', `last', an integer or a
1309 predicate.  See Info node `(gnus)Customizing Articles'."
1310   :group 'gnus-article-treat
1311   :link '(custom-manual "(gnus)Customizing Articles")
1312   :type gnus-article-treat-head-custom)
1313 (put 'gnus-treat-highlight-headers 'highlight t)
1314
1315 (defcustom gnus-treat-highlight-citation t
1316   "Highlight cited text.
1317 Valid values are nil, t, `head', `first', `last', an integer or a
1318 predicate.  See Info node `(gnus)Customizing Articles'."
1319   :group 'gnus-article-treat
1320   :link '(custom-manual "(gnus)Customizing Articles")
1321   :type gnus-article-treat-custom)
1322 (put 'gnus-treat-highlight-citation 'highlight t)
1323
1324 (defcustom gnus-treat-strip-headers-in-body t
1325   "Strip the X-No-Archive header line from the beginning of the body.
1326 Valid values are nil, t, `head', `first', `last', an integer or a
1327 predicate.  See Info node `(gnus)Customizing Articles'."
1328   :version "21.1"
1329   :group 'gnus-article-treat
1330   :link '(custom-manual "(gnus)Customizing Articles")
1331   :type gnus-article-treat-custom)
1332
1333 (defcustom gnus-treat-strip-trailing-blank-lines nil
1334   "Strip trailing blank lines.
1335 Valid values are nil, t, `head', `first', `last', an integer or a
1336 predicate.  See Info node `(gnus)Customizing Articles'.
1337
1338 When set to t, it also strips trailing blanks in all MIME parts.
1339 Consider to use `last' instead."
1340   :group 'gnus-article-treat
1341   :link '(custom-manual "(gnus)Customizing Articles")
1342   :type gnus-article-treat-custom)
1343
1344 (defcustom gnus-treat-strip-leading-blank-lines nil
1345   "Strip leading blank lines.
1346 Valid values are nil, t, `head', `first', `last', an integer or a
1347 predicate.  See Info node `(gnus)Customizing Articles'.
1348
1349 When set to t, it also strips trailing blanks in all MIME parts."
1350   :group 'gnus-article-treat
1351   :link '(custom-manual "(gnus)Customizing Articles")
1352   :type gnus-article-treat-custom)
1353
1354 (defcustom gnus-treat-strip-multiple-blank-lines nil
1355   "Strip multiple blank lines.
1356 Valid values are nil, t, `head', `first', `last', an integer or a
1357 predicate.  See Info node `(gnus)Customizing Articles'."
1358   :group 'gnus-article-treat
1359   :link '(custom-manual "(gnus)Customizing Articles")
1360   :type gnus-article-treat-custom)
1361
1362 (defcustom gnus-treat-unfold-headers 'head
1363   "Unfold folded header lines.
1364 Valid values are nil, t, `head', `first', `last', an integer or a
1365 predicate.  See Info node `(gnus)Customizing Articles'."
1366   :version "22.1"
1367   :group 'gnus-article-treat
1368   :link '(custom-manual "(gnus)Customizing Articles")
1369   :type gnus-article-treat-custom)
1370
1371 (defcustom gnus-article-unfold-long-headers nil
1372   "If non-nil, allow unfolding headers even if the header is long.
1373 If it is a regexp, only long headers matching this regexp are unfolded.
1374 If it is t, all long headers are unfolded.
1375
1376 This variable has no effect if `gnus-treat-unfold-headers' is nil."
1377   :version "23.1" ;; No Gnus
1378   :group 'gnus-article-treat
1379   :type '(choice (const nil)
1380                  (const :tag "all" t)
1381                  (regexp)))
1382
1383 (defcustom gnus-treat-fold-headers nil
1384   "Fold headers.
1385 Valid values are nil, t, `head', `first', `last', an integer or a
1386 predicate.  See Info node `(gnus)Customizing Articles'."
1387   :version "22.1"
1388   :group 'gnus-article-treat
1389   :link '(custom-manual "(gnus)Customizing Articles")
1390   :type gnus-article-treat-custom)
1391
1392 (defcustom gnus-treat-fold-newsgroups 'head
1393   "Fold the Newsgroups and Followup-To headers.
1394 Valid values are nil, t, `head', `first', `last', an integer or a
1395 predicate.  See Info node `(gnus)Customizing Articles'."
1396   :version "22.1"
1397   :group 'gnus-article-treat
1398   :link '(custom-manual "(gnus)Customizing Articles")
1399   :type gnus-article-treat-custom)
1400
1401 (defcustom gnus-treat-overstrike t
1402   "Treat overstrike highlighting.
1403 Valid values are nil, t, `head', `first', `last', an integer or a
1404 predicate.  See Info node `(gnus)Customizing Articles'."
1405   :group 'gnus-article-treat
1406   :link '(custom-manual "(gnus)Customizing Articles")
1407   :type gnus-article-treat-custom)
1408 (put 'gnus-treat-overstrike 'highlight t)
1409
1410 (defcustom gnus-treat-ansi-sequences (if (locate-library "ansi-color") t)
1411   "Treat ANSI SGR control sequences.
1412 Valid values are nil, t, `head', `first', `last', an integer or a
1413 predicate.  See Info node `(gnus)Customizing Articles'."
1414   :group 'gnus-article-treat
1415   :link '(custom-manual "(gnus)Customizing Articles")
1416   :type gnus-article-treat-custom)
1417
1418 (make-obsolete-variable 'gnus-treat-display-xface
1419                         'gnus-treat-display-x-face "Emacs 22.1")
1420
1421 (defcustom gnus-treat-display-x-face
1422   (and (not noninteractive)
1423        (gnus-image-type-available-p 'xbm)
1424        (if (featurep 'xemacs)
1425            (featurep 'xface)
1426          (condition-case nil
1427              (and (string-match "^0x" (shell-command-to-string "uncompface"))
1428                   (executable-find "icontopbm"))
1429            ;; shell-command-to-string may signal an error, e.g. if
1430            ;; shell-file-name is not found.
1431            (error nil)))
1432        'head)
1433   "Display X-Face headers.
1434 Valid values are nil and `head'.
1435 See Info node `(gnus)Customizing Articles' and Info node
1436 `(gnus)X-Face' for details."
1437   :group 'gnus-article-treat
1438   :version "21.1"
1439   :link '(custom-manual "(gnus)Customizing Articles")
1440   :link '(custom-manual "(gnus)X-Face")
1441   :type gnus-article-treat-head-custom
1442   :set (lambda (symbol value)
1443          (set-default
1444           symbol
1445           (cond ((or (boundp symbol) (get symbol 'saved-value))
1446                  value)
1447                 ((boundp 'gnus-treat-display-xface)
1448                  (message "\
1449 ** gnus-treat-display-xface is an obsolete variable;\
1450  use gnus-treat-display-x-face instead")
1451                  (default-value 'gnus-treat-display-xface))
1452                 ((get 'gnus-treat-display-xface 'saved-value)
1453                  (message "\
1454 ** gnus-treat-display-xface is an obsolete variable;\
1455  use gnus-treat-display-x-face instead")
1456                  (eval (car (get 'gnus-treat-display-xface 'saved-value))))
1457                 (t
1458                  value)))))
1459 (put 'gnus-treat-display-x-face 'highlight t)
1460
1461 (defcustom gnus-treat-display-face
1462   (and (not noninteractive)
1463        (gnus-image-type-available-p 'png)
1464        'head)
1465   "Display Face headers.
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)Face' for details."
1469   :group 'gnus-article-treat
1470   :version "22.1"
1471   :link '(custom-manual "(gnus)Customizing Articles")
1472   :link '(custom-manual "(gnus)X-Face")
1473   :type gnus-article-treat-head-custom)
1474 (put 'gnus-treat-display-face 'highlight t)
1475
1476 (defcustom gnus-treat-display-smileys (gnus-image-type-available-p 'xpm)
1477   "Display smileys.
1478 Valid values are nil, t, `head', `first', `last', an integer or a
1479 predicate.  See Info node `(gnus)Customizing Articles' and Info
1480 node `(gnus)Smileys' for details."
1481   :group 'gnus-article-treat
1482   :version "21.1"
1483   :link '(custom-manual "(gnus)Customizing Articles")
1484   :link '(custom-manual "(gnus)Smileys")
1485   :type gnus-article-treat-custom)
1486 (put 'gnus-treat-display-smileys 'highlight t)
1487
1488 (defcustom gnus-treat-from-picon
1489   (if (and (gnus-image-type-available-p 'xpm)
1490            (gnus-picons-installed-p))
1491       'head nil)
1492   "Display picons in the From header.
1493 Valid values are nil, t, `head', `first', `last', an integer or a
1494 predicate.  See Info node `(gnus)Customizing Articles' and Info
1495 node `(gnus)Picons' for details."
1496   :version "22.1"
1497   :group 'gnus-article-treat
1498   :group 'gnus-picon
1499   :link '(custom-manual "(gnus)Customizing Articles")
1500   :link '(custom-manual "(gnus)Picons")
1501   :type gnus-article-treat-head-custom)
1502 (put 'gnus-treat-from-picon 'highlight t)
1503
1504 (defcustom gnus-treat-mail-picon
1505   (if (and (gnus-image-type-available-p 'xpm)
1506            (gnus-picons-installed-p))
1507       'head nil)
1508   "Display picons in To and Cc headers.
1509 Valid values are nil, t, `head', `first', `last', an integer or a
1510 predicate.  See Info node `(gnus)Customizing Articles' and Info
1511 node `(gnus)Picons' for details."
1512   :version "22.1"
1513   :group 'gnus-article-treat
1514   :group 'gnus-picon
1515   :link '(custom-manual "(gnus)Customizing Articles")
1516   :link '(custom-manual "(gnus)Picons")
1517   :type gnus-article-treat-head-custom)
1518 (put 'gnus-treat-mail-picon 'highlight t)
1519
1520 (defcustom gnus-treat-newsgroups-picon
1521   (if (and (gnus-image-type-available-p 'xpm)
1522            (gnus-picons-installed-p))
1523       'head nil)
1524   "Display picons in the Newsgroups and Followup-To headers.
1525 Valid values are nil, t, `head', `first', `last', an integer or a
1526 predicate.  See Info node `(gnus)Customizing Articles' and Info
1527 node `(gnus)Picons' for details."
1528   :version "22.1"
1529   :group 'gnus-article-treat
1530   :group 'gnus-picon
1531   :link '(custom-manual "(gnus)Customizing Articles")
1532   :link '(custom-manual "(gnus)Picons")
1533   :type gnus-article-treat-head-custom)
1534 (put 'gnus-treat-newsgroups-picon 'highlight t)
1535
1536 (defcustom gnus-treat-from-gravatar nil
1537   "Display gravatars in the From header.
1538 Valid values are nil, t, `head', `first', `last', an integer or a
1539 predicate.  See Info node `(gnus)Customizing Articles' and Info
1540 node `(gnus)Gravatars' for details."
1541   :version "24.1"
1542   :group 'gnus-article-treat
1543   :group 'gnus-gravatar
1544   :link '(custom-manual "(gnus)Customizing Articles")
1545   :link '(custom-manual "(gnus)Gravatars")
1546   :type gnus-article-treat-head-custom)
1547 (put 'gnus-treat-from-gravatar 'highlight t)
1548
1549 (defcustom gnus-treat-mail-gravatar nil
1550   "Display gravatars in To and Cc headers.
1551 Valid values are nil, t, `head', `first', `last', an integer or a
1552 predicate.  See Info node `(gnus)Customizing Articles' and Info
1553 node `(gnus)Gravatars' for details."
1554   :version "24.1"
1555   :group 'gnus-article-treat
1556   :group 'gnus-gravatar
1557   :link '(custom-manual "(gnus)Customizing Articles")
1558   :link '(custom-manual "(gnus)Gravatars")
1559   :type gnus-article-treat-head-custom)
1560 (put 'gnus-treat-mail-gravatar 'highlight t)
1561
1562 (defcustom gnus-treat-body-boundary
1563   (if (or gnus-treat-newsgroups-picon
1564           gnus-treat-mail-picon
1565           gnus-treat-from-picon
1566           gnus-treat-from-gravatar
1567           gnus-treat-mail-gravatar)
1568       ;; If there's much decoration, the user might prefer a boundary.
1569       'head
1570     nil)
1571   "Draw a boundary at the end of the headers.
1572 Valid values are nil and `head'.
1573 See Info node `(gnus)Customizing Articles' for details."
1574   :version "22.1"
1575   :group 'gnus-article-treat
1576   :link '(custom-manual "(gnus)Customizing Articles")
1577   :type gnus-article-treat-head-custom)
1578
1579 (defcustom gnus-treat-capitalize-sentences nil
1580   "Capitalize sentence-starting words.
1581 Valid values are nil, t, `head', `first', `last', an integer or a
1582 predicate.  See Info node `(gnus)Customizing Articles'."
1583   :version "21.1"
1584   :group 'gnus-article-treat
1585   :link '(custom-manual "(gnus)Customizing Articles")
1586   :type gnus-article-treat-custom)
1587
1588 (defcustom gnus-treat-wash-html nil
1589   "Format as HTML.
1590 Valid values are nil, t, `head', `first', `last', an integer or a
1591 predicate.  See Info node `(gnus)Customizing Articles'."
1592   :version "22.1"
1593   :group 'gnus-article-treat
1594   :link '(custom-manual "(gnus)Customizing Articles")
1595   :type gnus-article-treat-custom)
1596
1597 (defcustom gnus-treat-fill-long-lines '(typep "text/plain")
1598   "Fill long lines.
1599 Valid values are nil, t, `head', `first', `last', an integer or a
1600 predicate.  See Info node `(gnus)Customizing Articles'."
1601   :version "24.1"
1602   :group 'gnus-article-treat
1603   :link '(custom-manual "(gnus)Customizing Articles")
1604   :type gnus-article-treat-custom)
1605
1606 (defcustom gnus-treat-x-pgp-sig nil
1607   "Verify X-PGP-Sig.
1608 To automatically treat X-PGP-Sig, set it to head.
1609 Valid values are nil, t, `head', `first', `last', an integer or a
1610 predicate.  See Info node `(gnus)Customizing Articles'."
1611   :version "22.1"
1612   :group 'gnus-article-treat
1613   :group 'mime-security
1614   :link '(custom-manual "(gnus)Customizing Articles")
1615   :type gnus-article-treat-custom)
1616
1617 (defvar gnus-article-encrypt-protocol-alist
1618   '(("PGP" . mml2015-self-encrypt)))
1619
1620 ;; Set to nil if more than one protocol added to
1621 ;; gnus-article-encrypt-protocol-alist.
1622 (defcustom gnus-article-encrypt-protocol "PGP"
1623   "The protocol used for encrypt articles.
1624 It is a string, such as \"PGP\". If nil, ask user."
1625   :version "22.1"
1626   :type 'string
1627   :group 'mime-security)
1628
1629 (defcustom gnus-use-idna (and (condition-case nil (require 'idna) (file-error))
1630                               (mm-coding-system-p 'utf-8)
1631                               (executable-find idna-program))
1632   "Whether IDNA decoding of headers is used when viewing messages.
1633 This requires GNU Libidn, and by default only enabled if it is found."
1634   :version "22.1"
1635   :group 'gnus-article-headers
1636   :type 'boolean)
1637
1638 (defcustom gnus-article-over-scroll nil
1639   "If non-nil, allow scrolling the article buffer even when there no more text."
1640   :version "22.1"
1641   :group 'gnus-article
1642   :type 'boolean)
1643
1644 (defcustom gnus-inhibit-images nil
1645   "Non-nil means inhibit displaying of images inline in the article body."
1646   :version "24.1"
1647   :group 'gnus-article
1648   :type 'boolean)
1649
1650 (defcustom gnus-blocked-images 'gnus-block-private-groups
1651   "Images that have URLs matching this regexp will be blocked.
1652 This can also be a function to be evaluated.  If so, it will be
1653 called with the group name as the parameter, and should return a
1654 regexp."
1655   :version "24.1"
1656   :group 'gnus-art
1657   :type '(choice regexp function))
1658
1659 ;;; Internal variables
1660
1661 (defvar gnus-english-month-names
1662   '("January" "February" "March" "April" "May" "June" "July" "August"
1663     "September" "October" "November" "December"))
1664
1665 (defvar article-goto-body-goes-to-point-min-p nil)
1666 (defvar gnus-article-wash-types nil)
1667 (defvar gnus-article-emphasis-alist nil)
1668 (defvar gnus-article-image-alist nil)
1669
1670 (defvar gnus-article-mime-handle-alist-1 nil)
1671 (defvar gnus-treatment-function-alist
1672   '((gnus-treat-strip-cr gnus-article-remove-cr)
1673     (gnus-treat-x-pgp-sig gnus-article-verify-x-pgp-sig)
1674     (gnus-treat-strip-banner gnus-article-strip-banner)
1675     (gnus-treat-strip-headers-in-body gnus-article-strip-headers-in-body)
1676     (gnus-treat-highlight-signature gnus-article-highlight-signature)
1677     (gnus-treat-buttonize gnus-article-add-buttons)
1678     (gnus-treat-fill-article gnus-article-fill-cited-article)
1679     (gnus-treat-fill-long-lines gnus-article-fill-cited-long-lines)
1680     (gnus-treat-unsplit-urls gnus-article-unsplit-urls)
1681     (gnus-treat-display-x-face gnus-article-display-x-face)
1682     (gnus-treat-display-face gnus-article-display-face)
1683     (gnus-treat-hide-headers gnus-article-maybe-hide-headers)
1684     (gnus-treat-hide-boring-headers gnus-article-hide-boring-headers)
1685     (gnus-treat-hide-signature gnus-article-hide-signature)
1686     (gnus-treat-strip-list-identifiers gnus-article-hide-list-identifiers)
1687     (gnus-treat-leading-whitespace gnus-article-remove-leading-whitespace)
1688     (gnus-treat-from-picon gnus-treat-from-picon)
1689     (gnus-treat-mail-picon gnus-treat-mail-picon)
1690     (gnus-treat-newsgroups-picon gnus-treat-newsgroups-picon)
1691     (gnus-treat-strip-pem gnus-article-hide-pem)
1692     (gnus-treat-date gnus-article-treat-date)
1693     (gnus-treat-from-gravatar gnus-treat-from-gravatar)
1694     (gnus-treat-mail-gravatar gnus-treat-mail-gravatar)
1695     (gnus-treat-highlight-headers gnus-article-highlight-headers)
1696     (gnus-treat-highlight-signature gnus-article-highlight-signature)
1697     (gnus-treat-strip-trailing-blank-lines
1698      gnus-article-remove-trailing-blank-lines)
1699     (gnus-treat-strip-leading-blank-lines
1700      gnus-article-strip-leading-blank-lines)
1701     (gnus-treat-strip-multiple-blank-lines
1702      gnus-article-strip-multiple-blank-lines)
1703     (gnus-treat-overstrike gnus-article-treat-overstrike)
1704     (gnus-treat-ansi-sequences gnus-article-treat-ansi-sequences)
1705     (gnus-treat-unfold-headers gnus-article-treat-unfold-headers)
1706     (gnus-treat-fold-newsgroups gnus-article-treat-fold-newsgroups)
1707     (gnus-treat-fold-headers gnus-article-treat-fold-headers)
1708     (gnus-treat-buttonize-head gnus-article-add-buttons-to-head)
1709     (gnus-treat-display-smileys gnus-treat-smiley)
1710     (gnus-treat-capitalize-sentences gnus-article-capitalize-sentences)
1711     (gnus-treat-wash-html gnus-article-wash-html)
1712     (gnus-treat-emphasize gnus-article-emphasize)
1713     (gnus-treat-hide-citation gnus-article-hide-citation)
1714     (gnus-treat-hide-citation-maybe gnus-article-hide-citation-maybe)
1715     (gnus-treat-highlight-citation gnus-article-highlight-citation)
1716     (gnus-treat-body-boundary gnus-article-treat-body-boundary)))
1717
1718 (defvar gnus-article-mime-handle-alist nil)
1719 (defvar article-lapsed-timer nil)
1720 (defvar gnus-article-current-summary nil)
1721
1722 (defvar gnus-article-mode-syntax-table
1723   (let ((table (copy-syntax-table text-mode-syntax-table)))
1724     ;; This causes the citation match run O(2^n).
1725     ;; (modify-syntax-entry ?- "w" table)
1726     (modify-syntax-entry ?> ")<" table)
1727     (modify-syntax-entry ?< "(>" table)
1728     ;; make M-. in article buffers work for `foo' strings
1729     (modify-syntax-entry ?' " " table)
1730     (modify-syntax-entry ?` " " table)
1731     table)
1732   "Syntax table used in article mode buffers.
1733 Initialized from `text-mode-syntax-table.")
1734
1735 (defvar gnus-save-article-buffer nil)
1736
1737 (defvar gnus-number-of-articles-to-be-saved nil)
1738
1739 (defvar gnus-inhibit-hiding nil)
1740
1741 (defvar gnus-article-edit-mode nil)
1742
1743 ;;; Macros for dealing with the article buffer.
1744
1745 (defmacro gnus-with-article-headers (&rest forms)
1746   `(with-current-buffer gnus-article-buffer
1747      (save-restriction
1748        (let ((inhibit-read-only t)
1749              (inhibit-point-motion-hooks t)
1750              (case-fold-search t))
1751          (article-narrow-to-head)
1752          ,@forms))))
1753
1754 (put 'gnus-with-article-headers 'lisp-indent-function 0)
1755 (put 'gnus-with-article-headers 'edebug-form-spec '(body))
1756
1757 (defmacro gnus-with-article-buffer (&rest forms)
1758   `(when (buffer-live-p (get-buffer gnus-article-buffer))
1759      (with-current-buffer gnus-article-buffer
1760        (let ((inhibit-read-only t))
1761          ,@forms))))
1762
1763 (put 'gnus-with-article-buffer 'lisp-indent-function 0)
1764 (put 'gnus-with-article-buffer 'edebug-form-spec '(body))
1765
1766 (defun gnus-article-goto-header (header)
1767   "Go to HEADER, which is a regular expression."
1768   (re-search-forward (concat "^\\(" header "\\):") nil t))
1769
1770 (defsubst gnus-article-hide-text (b e props)
1771   "Set text PROPS on the B to E region, extending `intangible' 1 past B."
1772   (gnus-add-text-properties-when 'article-type nil b e props)
1773   (when (memq 'intangible props)
1774     (put-text-property
1775      (max (1- b) (point-min))
1776      b 'intangible (cddr (memq 'intangible props)))))
1777
1778 (defsubst gnus-article-unhide-text (b e)
1779   "Remove hidden text properties from region between B and E."
1780   (remove-text-properties b e gnus-hidden-properties)
1781   (when (memq 'intangible gnus-hidden-properties)
1782     (put-text-property (max (1- b) (point-min))
1783                        b 'intangible nil)))
1784
1785 (defun gnus-article-hide-text-type (b e type)
1786   "Hide text of TYPE between B and E."
1787   (gnus-add-wash-type type)
1788   (gnus-article-hide-text
1789    b e (cons 'article-type (cons type gnus-hidden-properties))))
1790
1791 (defun gnus-article-unhide-text-type (b e type)
1792   "Unhide text of TYPE between B and E."
1793   (gnus-delete-wash-type type)
1794   (remove-text-properties
1795    b e (cons 'article-type (cons type gnus-hidden-properties)))
1796   (when (memq 'intangible gnus-hidden-properties)
1797     (put-text-property (max (1- b) (point-min))
1798                        b 'intangible nil)))
1799
1800 (defun gnus-article-delete-text-of-type (type)
1801   "Delete text of TYPE in the current buffer."
1802   (save-excursion
1803     (let ((b (point-min)))
1804       (if (eq type 'multipart)
1805           ;; Remove MIME buttons associated with multipart/alternative parts.
1806           (progn
1807             (goto-char b)
1808             (while (if (get-text-property (point) 'gnus-part)
1809                        (setq b (point))
1810                      (when (setq b (next-single-property-change (point)
1811                                                                 'gnus-part))
1812                        (goto-char b)
1813                        t))
1814               (end-of-line)
1815               (skip-chars-forward "\n")
1816               (when (eq (get-text-property b 'article-type) 'multipart)
1817                 (delete-region b (point)))))
1818         (while (setq b (text-property-any b (point-max) 'article-type type))
1819           (delete-region
1820            b (or (text-property-not-all b (point-max) 'article-type type)
1821                  (point-max))))))))
1822
1823 (defun gnus-article-delete-invisible-text ()
1824   "Delete all invisible text in the current buffer."
1825   (save-excursion
1826     (let ((b (point-min)))
1827       (while (setq b (text-property-any b (point-max) 'invisible t))
1828         (delete-region
1829          b (or (text-property-not-all b (point-max) 'invisible t)
1830                (point-max)))))))
1831
1832 (defsubst gnus-article-header-rank ()
1833   "Give the rank of the string HEADER as given by `gnus-sorted-header-list'."
1834   (let ((list gnus-sorted-header-list)
1835         (i 1))
1836     (while list
1837       (if (looking-at (car list))
1838           (setq list nil)
1839         (setq list (cdr list))
1840         (incf i)))
1841       i))
1842
1843 (defun article-hide-headers (&optional arg delete)
1844   "Hide unwanted headers and possibly sort them as well."
1845   (interactive)
1846   ;; This function might be inhibited.
1847   (unless gnus-inhibit-hiding
1848     (let ((inhibit-read-only t)
1849           (case-fold-search t)
1850           (max (1+ (length gnus-sorted-header-list)))
1851           (inhibit-point-motion-hooks t)
1852           (cur (current-buffer))
1853           ignored visible beg)
1854       (save-excursion
1855         ;; `gnus-ignored-headers' and `gnus-visible-headers' may be
1856         ;; group parameters, so we should go to the summary buffer.
1857         (when (prog1
1858                   (condition-case nil
1859                       (progn (set-buffer gnus-summary-buffer) t)
1860                     (error nil))
1861                 (setq ignored (when (not gnus-visible-headers)
1862                                 (cond ((stringp gnus-ignored-headers)
1863                                        gnus-ignored-headers)
1864                                       ((listp gnus-ignored-headers)
1865                                        (mapconcat 'identity
1866                                                   gnus-ignored-headers
1867                                                   "\\|"))))
1868                       visible (cond ((stringp gnus-visible-headers)
1869                                      gnus-visible-headers)
1870                                     ((and gnus-visible-headers
1871                                           (listp gnus-visible-headers))
1872                                      (mapconcat 'identity
1873                                                 gnus-visible-headers
1874                                                 "\\|")))))
1875           (set-buffer cur))
1876         (save-restriction
1877           ;; First we narrow to just the headers.
1878           (article-narrow-to-head)
1879           ;; Hide any "From " lines at the beginning of (mail) articles.
1880           (while (looking-at "From ")
1881             (forward-line 1))
1882           (unless (bobp)
1883             (delete-region (point-min) (point)))
1884           ;; Then treat the rest of the header lines.
1885           ;; Then we use the two regular expressions
1886           ;; `gnus-ignored-headers' and `gnus-visible-headers' to
1887           ;; select which header lines is to remain visible in the
1888           ;; article buffer.
1889           (while (re-search-forward "^[^ \t:]*:" nil t)
1890             (beginning-of-line)
1891             ;; Mark the rank of the header.
1892             (put-text-property
1893              (point) (1+ (point)) 'message-rank
1894              (if (or (and visible (looking-at visible))
1895                      (and ignored
1896                           (not (looking-at ignored))))
1897                  (gnus-article-header-rank)
1898                (+ 2 max)))
1899             (forward-line 1))
1900           (message-sort-headers-1)
1901           (when (setq beg (text-property-any
1902                            (point-min) (point-max) 'message-rank (+ 2 max)))
1903             ;; We delete the unwanted headers.
1904             (gnus-add-wash-type 'headers)
1905             (add-text-properties (point-min) (+ 5 (point-min))
1906                                  '(article-type headers dummy-invisible t))
1907             (delete-region beg (point-max))))))))
1908
1909 (defun article-hide-boring-headers (&optional arg)
1910   "Toggle hiding of headers that aren't very interesting.
1911 If given a negative prefix, always show; if given a positive prefix,
1912 always hide."
1913   (interactive (gnus-article-hidden-arg))
1914   (when (and (not (gnus-article-check-hidden-text 'boring-headers arg))
1915              (not gnus-show-all-headers))
1916     (save-excursion
1917       (save-restriction
1918         (let ((inhibit-read-only t)
1919               (inhibit-point-motion-hooks t))
1920           (article-narrow-to-head)
1921           (dolist (elem gnus-boring-article-headers)
1922             (goto-char (point-min))
1923             (cond
1924              ;; Hide empty headers.
1925              ((eq elem 'empty)
1926               (while (re-search-forward "^[^: \t]+:[ \t]*\n[^ \t]" nil t)
1927                 (forward-line -1)
1928                 (gnus-article-hide-text-type
1929                  (point-at-bol)
1930                  (progn
1931                    (end-of-line)
1932                    (if (re-search-forward "^[^ \t]" nil t)
1933                        (match-beginning 0)
1934                      (point-max)))
1935                  'boring-headers)))
1936              ;; Hide boring Newsgroups header.
1937              ((eq elem 'newsgroups)
1938               (when (gnus-string-equal
1939                      (gnus-fetch-field "newsgroups")
1940                      (gnus-group-real-name
1941                       (if (boundp 'gnus-newsgroup-name)
1942                           gnus-newsgroup-name
1943                         "")))
1944                 (gnus-article-hide-header "newsgroups")))
1945              ((eq elem 'to-address)
1946               (let ((to (message-fetch-field "to"))
1947                     (to-address
1948                      (gnus-parameter-to-address
1949                       (if (boundp 'gnus-newsgroup-name)
1950                           gnus-newsgroup-name ""))))
1951                 (when (and to to-address
1952                            (ignore-errors
1953                              (gnus-string-equal
1954                               ;; only one address in To
1955                               (nth 1 (mail-extract-address-components to))
1956                               to-address)))
1957                   (gnus-article-hide-header "to"))))
1958              ((eq elem 'to-list)
1959               (let ((to (message-fetch-field "to"))
1960                     (to-list
1961                      (gnus-parameter-to-list
1962                       (if (boundp 'gnus-newsgroup-name)
1963                           gnus-newsgroup-name ""))))
1964                 (when (and to to-list
1965                            (ignore-errors
1966                              (gnus-string-equal
1967                               ;; only one address in To
1968                               (nth 1 (mail-extract-address-components to))
1969                               to-list)))
1970                   (gnus-article-hide-header "to"))))
1971              ((eq elem 'cc-list)
1972               (let ((cc (message-fetch-field "cc"))
1973                     (to-list
1974                      (gnus-parameter-to-list
1975                       (if (boundp 'gnus-newsgroup-name)
1976                           gnus-newsgroup-name ""))))
1977                 (when (and cc to-list
1978                            (ignore-errors
1979                              (gnus-string-equal
1980                               ;; only one address in CC
1981                               (nth 1 (mail-extract-address-components cc))
1982                               to-list)))
1983                   (gnus-article-hide-header "cc"))))
1984              ((eq elem 'followup-to)
1985               (when (gnus-string-equal
1986                      (message-fetch-field "followup-to")
1987                      (message-fetch-field "newsgroups"))
1988                 (gnus-article-hide-header "followup-to")))
1989              ((eq elem 'reply-to)
1990               (if (gnus-group-find-parameter
1991                    gnus-newsgroup-name 'broken-reply-to)
1992                   (gnus-article-hide-header "reply-to")
1993                 (let ((from (message-fetch-field "from"))
1994                       (reply-to (message-fetch-field "reply-to")))
1995                   (when
1996                       (and
1997                        from reply-to
1998                        (ignore-errors
1999                          (equal
2000                           (sort (mapcar
2001                                  (lambda (x) (downcase (cadr x)))
2002                                  (mail-extract-address-components from t))
2003                                 'string<)
2004                           (sort (mapcar
2005                                  (lambda (x) (downcase (cadr x)))
2006                                  (mail-extract-address-components reply-to t))
2007                                 'string<))))
2008                     (gnus-article-hide-header "reply-to")))))
2009              ((eq elem 'date)
2010               (let ((date (with-current-buffer gnus-original-article-buffer
2011                             ;; If date in `gnus-article-buffer' is localized
2012                             ;; (`gnus-treat-date-user-defined'),
2013                             ;; `days-between' might fail.
2014                             (message-fetch-field "date"))))
2015                 (when (and date
2016                            (< (days-between (current-time-string) date)
2017                               4))
2018                   (gnus-article-hide-header "date"))))
2019              ((eq elem 'long-to)
2020               (let ((to (message-fetch-field "to"))
2021                     (cc (message-fetch-field "cc")))
2022                 (when (> (length to) 1024)
2023                   (gnus-article-hide-header "to"))
2024                 (when (> (length cc) 1024)
2025                   (gnus-article-hide-header "cc"))))
2026              ((eq elem 'many-to)
2027               (let ((to-count 0)
2028                     (cc-count 0))
2029                 (goto-char (point-min))
2030                 (while (re-search-forward "^to:" nil t)
2031                   (setq to-count (1+ to-count)))
2032                 (when (> to-count 1)
2033                   (while (> to-count 0)
2034                     (goto-char (point-min))
2035                     (save-restriction
2036                       (re-search-forward "^to:" nil nil to-count)
2037                       (forward-line -1)
2038                       (narrow-to-region (point) (point-max))
2039                       (gnus-article-hide-header "to"))
2040                     (setq to-count (1- to-count))))
2041                 (goto-char (point-min))
2042                 (while (re-search-forward "^cc:" nil t)
2043                   (setq cc-count (1+ cc-count)))
2044                 (when (> cc-count 1)
2045                   (while (> cc-count 0)
2046                     (goto-char (point-min))
2047                     (save-restriction
2048                       (re-search-forward "^cc:" nil nil cc-count)
2049                       (forward-line -1)
2050                       (narrow-to-region (point) (point-max))
2051                       (gnus-article-hide-header "cc"))
2052                     (setq cc-count (1- cc-count)))))))))))))
2053
2054 (defun gnus-article-hide-header (header)
2055   (save-excursion
2056     (goto-char (point-min))
2057     (when (re-search-forward (concat "^" header ":") nil t)
2058       (gnus-article-hide-text-type
2059        (point-at-bol)
2060        (progn
2061          (end-of-line)
2062          (if (re-search-forward "^[^ \t]" nil t)
2063              (match-beginning 0)
2064            (point-max)))
2065        'boring-headers))))
2066
2067 (defvar gnus-article-normalized-header-length 40
2068   "Length of normalized headers.")
2069
2070 (defun article-normalize-headers ()
2071   "Make all header lines 40 characters long."
2072   (interactive)
2073   (let ((inhibit-read-only t)
2074         column)
2075     (save-excursion
2076       (save-restriction
2077         (article-narrow-to-head)
2078         (while (not (eobp))
2079           (cond
2080            ((< (setq column (- (point-at-eol) (point)))
2081                gnus-article-normalized-header-length)
2082             (end-of-line)
2083             (insert (make-string
2084                      (- gnus-article-normalized-header-length column)
2085                      ? )))
2086            ((> column gnus-article-normalized-header-length)
2087             (gnus-put-text-property
2088              (progn
2089                (forward-char gnus-article-normalized-header-length)
2090                (point))
2091              (point-at-eol)
2092              'invisible t))
2093            (t
2094             ;; Do nothing.
2095             ))
2096           (forward-line 1))))))
2097
2098 (defun article-treat-dumbquotes ()
2099   "Translate M****s*** sm*rtq**t*s and other symbols into proper text.
2100 Note that this function guesses whether a character is a sm*rtq**t* or
2101 not, so it should only be used interactively.
2102
2103 Sm*rtq**t*s are M****s***'s unilateral extension to the
2104 iso-8859-1 character map in an attempt to provide more quoting
2105 characters.  If you see something like \\222 or \\264 where
2106 you're expecting some kind of apostrophe or quotation mark, then
2107 try this wash."
2108   (interactive)
2109   (article-translate-strings gnus-article-dumbquotes-map))
2110
2111 (defvar org-entities)
2112
2113 (defun article-treat-non-ascii ()
2114   "Translate many Unicode characters into their ASCII equivalents."
2115   (interactive)
2116   (require 'org-entities)
2117   (let ((table (make-char-table (if (featurep 'xemacs) 'generic))))
2118     (dolist (elem org-entities)
2119       (when (and (listp elem)
2120                  (= (length (nth 6 elem)) 1))
2121         (if (featurep 'xemacs)
2122             (put-char-table (aref (nth 6 elem) 0) (nth 4 elem) table)
2123           (set-char-table-range table (aref (nth 6 elem) 0) (nth 4 elem)))))
2124     (save-excursion
2125       (when (article-goto-body)
2126         (let ((inhibit-read-only t)
2127               replace props)
2128           (while (not (eobp))
2129             (if (not (setq replace (if (featurep 'xemacs)
2130                                        (get-char-table (following-char) table)
2131                                      (aref table (following-char)))))
2132                 (forward-char 1)
2133               (if (prog1
2134                       (setq props (text-properties-at (point)))
2135                     (delete-char 1))
2136                   (add-text-properties (point) (progn (insert replace) (point))
2137                                        props)
2138                 (insert replace)))))))))
2139
2140 (defun article-translate-strings (map)
2141   "Translate all string in the body of the article according to MAP.
2142 MAP is an alist where the elements are on the form (\"from\" \"to\")."
2143   (save-excursion
2144     (when (article-goto-body)
2145       (let ((inhibit-read-only t))
2146         (dolist (elem map)
2147           (let ((from (car elem))
2148                 (to (cadr elem)))
2149             (save-excursion
2150               (if (stringp from)
2151                   (while (search-forward from nil t)
2152                     (replace-match to))
2153                 (while (not (eobp))
2154                   (if (eq (following-char) from)
2155                       (progn
2156                         (delete-char 1)
2157                         (insert to))
2158                     (forward-char 1)))))))))))
2159
2160 (defun article-treat-overstrike ()
2161   "Translate overstrikes into bold text."
2162   (interactive)
2163   (save-excursion
2164     (when (article-goto-body)
2165       (let ((inhibit-read-only t))
2166         (while (search-forward "\b" nil t)
2167           (let ((next (char-after))
2168                 (previous (char-after (- (point) 2))))
2169             ;; We do the boldification/underlining by hiding the
2170             ;; overstrikes and putting the proper text property
2171             ;; on the letters.
2172             (cond
2173              ((eq next previous)
2174               (gnus-article-hide-text-type (- (point) 2) (point) 'overstrike)
2175               (put-text-property (point) (1+ (point)) 'face 'bold))
2176              ((eq next ?_)
2177               (gnus-article-hide-text-type
2178                (1- (point)) (1+ (point)) 'overstrike)
2179               (put-text-property
2180                (- (point) 2) (1- (point)) 'face 'underline))
2181              ((eq previous ?_)
2182               (gnus-article-hide-text-type (- (point) 2) (point) 'overstrike)
2183               (put-text-property
2184                (point) (1+ (point)) 'face 'underline)))))))))
2185
2186 (defun article-treat-ansi-sequences ()
2187   "Translate ANSI SGR control sequences into overlays or extents."
2188   (interactive)
2189   (save-excursion
2190     (when (article-goto-body)
2191       (let ((inhibit-read-only t))
2192         (ansi-color-apply-on-region (point) (point-max))))))
2193
2194 (defun gnus-article-treat-unfold-headers ()
2195   "Unfold folded message headers.
2196 Only the headers that fit into the current window width will be
2197 unfolded."
2198   (interactive)
2199   (gnus-with-article-headers
2200     (let (length)
2201       (while (not (eobp))
2202         (save-restriction
2203           (mail-header-narrow-to-field)
2204           (let* ((header (buffer-string))
2205                  (unfoldable
2206                   (or (equal gnus-article-unfold-long-headers t)
2207                       (and (stringp gnus-article-unfold-long-headers)
2208                            (string-match gnus-article-unfold-long-headers
2209                                          header)))))
2210             (with-temp-buffer
2211               (insert header)
2212               (goto-char (point-min))
2213               (while (re-search-forward "\n[\t ]" nil t)
2214                 (replace-match " " t t)))
2215             (setq length (- (point-max) (point-min) 1))
2216             (when (or unfoldable
2217                       (< length (window-width)))
2218               (while (re-search-forward "\n[\t ]" nil t)
2219                 (replace-match " " t t))))
2220           (goto-char (point-max)))))))
2221
2222 (defun gnus-article-treat-fold-headers ()
2223   "Fold message headers."
2224   (interactive)
2225   (gnus-with-article-headers
2226     (while (not (eobp))
2227       (save-restriction
2228         (mail-header-narrow-to-field)
2229         (mail-header-fold-field)
2230         (goto-char (point-max))))))
2231
2232 (defun gnus-treat-smiley ()
2233   "Toggle display of textual emoticons (\"smileys\") as small graphical icons."
2234   (interactive)
2235   (gnus-with-article-buffer
2236     (if (memq 'smiley gnus-article-wash-types)
2237         (gnus-delete-images 'smiley)
2238       (article-goto-body)
2239       (let ((images (smiley-region (point) (point-max))))
2240         (when images
2241           (gnus-add-wash-type 'smiley)
2242           (dolist (image images)
2243             (gnus-add-image 'smiley image)))))))
2244
2245 (defun gnus-article-remove-images ()
2246   "Remove all images from the article buffer."
2247   (interactive)
2248   (gnus-with-article-buffer
2249     (save-restriction
2250       (widen)
2251       (dolist (elem gnus-article-image-alist)
2252         (gnus-delete-images (car elem))))))
2253
2254 (autoload 'w3m-toggle-inline-images "w3m")
2255
2256 (defun gnus-article-show-images ()
2257   "Show any images that are in the HTML-rendered article buffer.
2258 This only works if the article in question is HTML."
2259   (interactive)
2260   (gnus-with-article-buffer
2261     (save-restriction
2262       (widen)
2263       (if (eq mm-text-html-renderer 'w3m)
2264           (let ((mm-inline-text-html-with-images nil))
2265             (w3m-toggle-inline-images))
2266         (dolist (region (gnus-find-text-property-region (point-min) (point-max)
2267                                                         'image-displayer))
2268           (destructuring-bind (start end function) region
2269             (funcall function (get-text-property start 'image-url)
2270                      start end)))))))
2271
2272 (defun gnus-article-treat-fold-newsgroups ()
2273   "Unfold folded message headers.
2274 Only the headers that fit into the current window width will be
2275 unfolded."
2276   (interactive)
2277   (gnus-with-article-headers
2278     (while (gnus-article-goto-header "newsgroups\\|followup-to")
2279       (save-restriction
2280         (mail-header-narrow-to-field)
2281         (while (re-search-forward ", *" nil t)
2282           (replace-match ", " t t))
2283         (mail-header-fold-field)
2284         (goto-char (point-max))))))
2285
2286 (defcustom gnus-article-truncate-lines (default-value 'truncate-lines)
2287   "Value of `truncate-lines' in Gnus Article buffer.
2288 Valid values are nil, t, `head', `first', `last', an integer or a
2289 predicate.  See Info node `(gnus)Customizing Articles'."
2290   :version "23.1" ;; No Gnus
2291   :group 'gnus-article
2292   ;; :link '(custom-manual "(gnus)Customizing Articles")
2293   :type 'boolean)
2294
2295 (defun gnus-article-toggle-truncate-lines (&optional arg)
2296   "Toggle whether to fold or truncate long lines in article the buffer.
2297 If ARG is non-nil and not a number, toggle
2298 `gnus-article-truncate-lines' too.  If ARG is a number, truncate
2299 long lines if and only if arg is positive."
2300   (interactive "P")
2301   (cond
2302    ((and (numberp arg) (> arg 0))
2303     (setq gnus-article-truncate-lines t))
2304    ((numberp arg)
2305     (setq gnus-article-truncate-lines nil))
2306    (arg
2307     (setq gnus-article-truncate-lines
2308           (not gnus-article-truncate-lines))))
2309   (gnus-with-article-buffer
2310     (cond
2311      ((and (numberp arg) (> arg 0))
2312       (setq truncate-lines nil))
2313      ((numberp arg)
2314       (setq truncate-lines t)))
2315     ;; In versions of Emacs 22 (CVS) before 2006-05-26,
2316     ;; `toggle-truncate-lines' needs an argument.
2317     (toggle-truncate-lines)))
2318
2319 (defun gnus-article-treat-body-boundary ()
2320   "Place a boundary line at the end of the headers."
2321   (interactive)
2322   (when (and gnus-body-boundary-delimiter
2323              (> (length gnus-body-boundary-delimiter) 0))
2324     (gnus-with-article-headers
2325       (goto-char (point-max))
2326       (let ((start (point)))
2327         (insert "X-Boundary: ")
2328         (gnus-add-text-properties start (point) '(invisible t intangible t))
2329        (insert (let (str (max (window-width)))
2330                  (if (featurep 'xemacs)
2331                      (setq max (1- max)))
2332                  (while (>= max (length str))
2333                     (setq str (concat str gnus-body-boundary-delimiter)))
2334                  (substring str 0 max))
2335                 "\n")
2336         (gnus-put-text-property start (point) 'gnus-decoration 'header)))))
2337
2338 (defun article-fill-long-lines ()
2339   "Fill lines that are wider than the window width."
2340   (interactive)
2341   (save-excursion
2342     (let ((inhibit-read-only t)
2343           (width (window-width (get-buffer-window (current-buffer)))))
2344       (save-restriction
2345         (article-goto-body)
2346         (let ((adaptive-fill-mode nil)) ;Why?  -sm
2347           (while (not (eobp))
2348             (end-of-line)
2349             (when (>= (current-column) (min fill-column width))
2350               (narrow-to-region (min (1+ (point)) (point-max))
2351                                 (point-at-bol))
2352               (let ((goback (point-marker)))
2353                 (fill-paragraph nil)
2354                 (goto-char (marker-position goback)))
2355               (widen))
2356             (forward-line 1)))))))
2357
2358 (defun article-capitalize-sentences ()
2359   "Capitalize the first word in each sentence."
2360   (interactive)
2361   (save-excursion
2362     (let ((inhibit-read-only t)
2363           (paragraph-start "^[\n\^L]"))
2364       (article-goto-body)
2365       (while (not (eobp))
2366         (capitalize-word 1)
2367         (forward-sentence)))))
2368
2369 (defun article-remove-cr ()
2370   "Remove trailing CRs and then translate remaining CRs into LFs."
2371   (interactive)
2372   (save-excursion
2373     (let ((inhibit-read-only t))
2374       (goto-char (point-min))
2375       (while (re-search-forward "\r+$" nil t)
2376         (replace-match "" t t))
2377       (goto-char (point-min))
2378       (while (search-forward "\r" nil t)
2379         (replace-match "\n" t t)))))
2380
2381 (defun article-remove-trailing-blank-lines ()
2382   "Remove all trailing blank lines from the article."
2383   (interactive)
2384   (save-excursion
2385     (let ((inhibit-read-only t))
2386       (goto-char (point-max))
2387       (delete-region
2388        (point)
2389        (progn
2390          (while (and (not (bobp))
2391                      (looking-at "^[ \t]*$")
2392                      (not (gnus-annotation-in-region-p
2393                            (point) (point-at-eol))))
2394            (forward-line -1))
2395          (forward-line 1)
2396          (point))))))
2397
2398 (defvar gnus-face-properties-alist)
2399
2400 (defun article-display-face (&optional force)
2401   "Display any Face headers in the header."
2402   (interactive (list 'force))
2403   (let ((wash-face-p buffer-read-only))
2404     (gnus-with-article-headers
2405       ;; When displaying parts, this function can be called several times on
2406       ;; the same article, without any intended toggle semantic (as typing `W
2407       ;; D d' would have). So face deletion must occur only when we come from
2408       ;; an interactive command, that is when the *Article* buffer is
2409       ;; read-only.
2410       (if (and wash-face-p (memq 'face gnus-article-wash-types))
2411           (gnus-delete-images 'face)
2412         (let ((from (message-fetch-field "from"))
2413               face faces)
2414           (save-current-buffer
2415             (when (and wash-face-p
2416                        (gnus-buffer-live-p gnus-original-article-buffer)
2417                        (not (re-search-forward "^Face:[\t ]*" nil t)))
2418               (set-buffer gnus-original-article-buffer))
2419             (save-restriction
2420               (mail-narrow-to-head)
2421               (when (or force
2422                         ;; Check whether this face is censored.
2423                         (not (and gnus-article-x-face-too-ugly
2424                                   (or from
2425                                       (setq from (message-fetch-field "from")))
2426                                   (string-match gnus-article-x-face-too-ugly
2427                                                 from))))
2428                 (while (gnus-article-goto-header "Face")
2429                   (push (mail-header-field-value) faces)))))
2430           (when faces
2431             (goto-char (point-min))
2432             (let (png image)
2433               (unless (setq from (gnus-article-goto-header "from"))
2434                 (insert "From:")
2435                 (setq from (point))
2436                 (insert " [no `from' set]\n"))
2437               (while faces
2438                 (when (setq png (gnus-convert-face-to-png (pop faces)))
2439                   (setq image
2440                         (apply 'gnus-create-image png 'png t
2441                                (cdr (assq 'png gnus-face-properties-alist))))
2442                   (goto-char from)
2443                   (when image
2444                     (gnus-add-wash-type 'face)
2445                     (gnus-add-image 'face image)
2446                     (gnus-put-image image nil 'face)))))))))))
2447
2448 (defun article-display-x-face (&optional force)
2449   "Look for an X-Face header and display it if present."
2450   (interactive (list 'force))
2451   (let ((wash-face-p buffer-read-only)) ;; When type `W f'
2452     (gnus-with-article-headers
2453       ;; Delete the old process, if any.
2454       (when (process-status "article-x-face")
2455         (delete-process "article-x-face"))
2456       ;; See the comment in `article-display-face'.
2457       (if (and wash-face-p (memq 'xface gnus-article-wash-types))
2458           ;; We have already displayed X-Faces, so we remove them
2459           ;; instead.
2460           (gnus-delete-images 'xface)
2461         ;; Display X-Faces.
2462         (let ((from (message-fetch-field "from"))
2463               x-faces face)
2464           (save-current-buffer
2465             (when (and wash-face-p
2466                        (gnus-buffer-live-p gnus-original-article-buffer)
2467                        (not (re-search-forward "^X-Face:[\t ]*" nil t)))
2468               ;; If type `W f', use gnus-original-article-buffer,
2469               ;; otherwise use the current buffer because displaying
2470               ;; RFC822 parts calls this function too.
2471               (set-buffer gnus-original-article-buffer))
2472             (save-restriction
2473               (mail-narrow-to-head)
2474               (and gnus-article-x-face-command
2475                    (or force
2476                        ;; Check whether this face is censored.
2477                        (not (and gnus-article-x-face-too-ugly
2478                                  (or from
2479                                      (setq from (message-fetch-field "from")))
2480                                  (string-match gnus-article-x-face-too-ugly
2481                                                from))))
2482                    (while (gnus-article-goto-header "X-Face")
2483                      (push (mail-header-field-value) x-faces)))))
2484           (when x-faces
2485             ;; We display the face.
2486             (cond ((functionp gnus-article-x-face-command)
2487                    ;; The command is a lisp function, so we call it.
2488                    (mapc gnus-article-x-face-command x-faces))
2489                   ((stringp gnus-article-x-face-command)
2490                    ;; The command is a string, so we interpret the command
2491                    ;; as a, well, command, and fork it off.
2492                    (let ((process-connection-type nil))
2493                      (gnus-set-process-query-on-exit-flag
2494                       (start-process
2495                        "article-x-face" nil shell-file-name
2496                        shell-command-switch gnus-article-x-face-command)
2497                       nil)
2498                      ;; Sending multiple EOFs to xv doesn't work,
2499                      ;; so we only do a single external face.
2500                      (with-temp-buffer
2501                        (insert (car x-faces))
2502                        (process-send-region "article-x-face"
2503                                             (point-min) (point-max)))
2504                      (process-send-eof "article-x-face")))
2505                   (t
2506                    (error "`%s' set to `%s' is not a function"
2507                           gnus-article-x-face-command
2508                           'gnus-article-x-face-command)))))))))
2509
2510 (defun article-decode-mime-words ()
2511   "Decode all MIME-encoded words in the article."
2512   (interactive)
2513   (gnus-with-article-buffer
2514     (let ((inhibit-point-motion-hooks t)
2515           (mail-parse-charset gnus-newsgroup-charset)
2516           (mail-parse-ignored-charsets
2517            (with-current-buffer gnus-summary-buffer
2518              gnus-newsgroup-ignored-charsets)))
2519       (mail-decode-encoded-word-region (point-min) (point-max)))))
2520
2521 (defun article-decode-charset (&optional prompt)
2522   "Decode charset-encoded text in the article.
2523 If PROMPT (the prefix), prompt for a coding system to use."
2524   (interactive "P")
2525   (let ((inhibit-point-motion-hooks t) (case-fold-search t)
2526         (inhibit-read-only t)
2527         (mail-parse-charset gnus-newsgroup-charset)
2528         (mail-parse-ignored-charsets
2529          (save-excursion (condition-case nil
2530                              (set-buffer gnus-summary-buffer)
2531                            (error))
2532                          gnus-newsgroup-ignored-charsets))
2533         ct cte ctl charset format)
2534     (save-excursion
2535       (save-restriction
2536         (article-narrow-to-head)
2537         (setq ct (message-fetch-field "Content-Type" t)
2538               cte (message-fetch-field "Content-Transfer-Encoding" t)
2539               ctl (and ct (mail-header-parse-content-type ct))
2540               charset (cond
2541                        (prompt
2542                         (mm-read-coding-system "Charset to decode: "))
2543                        (ctl
2544                         (mail-content-type-get ctl 'charset)))
2545               format (and ctl (mail-content-type-get ctl 'format)))
2546         (when cte
2547           (setq cte (mail-header-strip cte)))
2548         (if (and ctl (not (string-match "/" (car ctl))))
2549             (setq ctl nil))
2550         (goto-char (point-max)))
2551       (forward-line 1)
2552       (save-restriction
2553         (narrow-to-region (point) (point-max))
2554         (when (and (eq mail-parse-charset 'gnus-decoded)
2555                    (eq (mm-body-7-or-8) '8bit))
2556           ;; The text code could have been decoded.
2557           (setq charset mail-parse-charset))
2558         (when (and (or (not ctl)
2559                        (equal (car ctl) "text/plain"))
2560                    (not format)) ;; article with format will decode later.
2561           (mm-decode-body
2562            charset (and cte (intern (downcase
2563                                      (gnus-strip-whitespace cte))))
2564            (car ctl)))))))
2565
2566 (defun article-decode-encoded-words ()
2567   "Remove encoded-word encoding from headers."
2568   (let ((inhibit-point-motion-hooks t)
2569         (mail-parse-charset gnus-newsgroup-charset)
2570         (mail-parse-ignored-charsets
2571          (save-excursion (condition-case nil
2572                              (set-buffer gnus-summary-buffer)
2573                            (error))
2574                          gnus-newsgroup-ignored-charsets))
2575         (inhibit-read-only t)
2576         end start)
2577     (goto-char (point-min))
2578     (when (search-forward "\n\n" nil 'move)
2579       (forward-line -1))
2580     (setq end (point))
2581     (while (not (bobp))
2582       (while (progn
2583                (forward-line -1)
2584                (and (not (bobp))
2585                     (memq (char-after) '(?\t ? )))))
2586       (setq start (point))
2587       (if (looking-at "\
2588 \\(?:Resent-\\)?\\(?:From\\|Cc\\|To\\|Bcc\\|\\(?:In-\\)?Reply-To\\|Sender\
2589 \\|Mail-Followup-To\\|Mail-Copies-To\\|Approved\\):")
2590           (funcall gnus-decode-address-function start end)
2591         (funcall gnus-decode-header-function start end))
2592       (goto-char (setq end start)))))
2593
2594 (defun article-decode-group-name ()
2595   "Decode group names in Newsgroups, Followup-To and Xref headers."
2596   (let ((inhibit-point-motion-hooks t)
2597         (inhibit-read-only t)
2598         (method (gnus-find-method-for-group gnus-newsgroup-name))
2599         regexp)
2600     (when (and (or gnus-group-name-charset-method-alist
2601                    gnus-group-name-charset-group-alist)
2602                (gnus-buffer-live-p gnus-original-article-buffer))
2603       (save-restriction
2604         (article-narrow-to-head)
2605         (dolist (header '("Newsgroups" "Followup-To" "Xref"))
2606           (with-current-buffer gnus-original-article-buffer
2607             (goto-char (point-min)))
2608           (setq regexp (concat "^" header
2609                                ":\\([^\n]*\\(?:\n[\t ]+[^\n]+\\)*\\)\n"))
2610           (while (re-search-forward regexp nil t)
2611             (replace-match (save-match-data
2612                              (gnus-decode-newsgroups
2613                               ;; XXX how to use data in article buffer?
2614                               (with-current-buffer gnus-original-article-buffer
2615                                 (re-search-forward regexp nil t)
2616                                 (match-string 1))
2617                               gnus-newsgroup-name method))
2618                            t t nil 1))
2619           (goto-char (point-min)))))))
2620
2621 (autoload 'idna-to-unicode "idna")
2622
2623 (defun article-decode-idna-rhs ()
2624   "Decode IDNA strings in RHS in various headers in current buffer.
2625 The following headers are decoded: From:, To:, Cc:, Reply-To:,
2626 Mail-Reply-To: and Mail-Followup-To:."
2627   (when gnus-use-idna
2628     (save-restriction
2629       (let ((inhibit-point-motion-hooks t)
2630             (inhibit-read-only t))
2631         (article-narrow-to-head)
2632         (goto-char (point-min))
2633         (while (re-search-forward "@[^ \t\n\r,>]*\\(xn--[-A-Za-z0-9.]*\\)[ \t\n\r,>]" nil t)
2634           (let (ace unicode)
2635             (when (save-match-data
2636                     (and (setq ace (match-string 1))
2637                          (save-excursion
2638                            (and (re-search-backward "^[^ \t]" nil t)
2639                                 (looking-at "From\\|To\\|Cc\\|Reply-To\\|Mail-Reply-To\\|Mail-Followup-To")))
2640                          (setq unicode (idna-to-unicode ace))))
2641               (unless (string= ace unicode)
2642                 (replace-match unicode nil nil nil 1)))))))))
2643
2644 (defun article-de-quoted-unreadable (&optional force read-charset)
2645   "Translate a quoted-printable-encoded article.
2646 If FORCE, decode the article whether it is marked as quoted-printable
2647 or not.
2648 If READ-CHARSET, ask for a coding system."
2649   (interactive (list 'force current-prefix-arg))
2650   (save-excursion
2651     (let ((inhibit-read-only t) type charset)
2652       (if (gnus-buffer-live-p gnus-original-article-buffer)
2653           (with-current-buffer gnus-original-article-buffer
2654             (setq type
2655                   (gnus-fetch-field "content-transfer-encoding"))
2656             (let* ((ct (gnus-fetch-field "content-type"))
2657                    (ctl (and ct (mail-header-parse-content-type ct))))
2658               (setq charset (and ctl
2659                                  (mail-content-type-get ctl 'charset)))
2660               (if (stringp charset)
2661                   (setq charset (intern (downcase charset)))))))
2662       (if read-charset
2663           (setq charset (mm-read-coding-system "Charset: " charset)))
2664       (unless charset
2665         (setq charset gnus-newsgroup-charset))
2666       (when (or force
2667                 (and type (let ((case-fold-search t))
2668                             (string-match "quoted-printable" type))))
2669         (article-goto-body)
2670         (quoted-printable-decode-region
2671          (point) (point-max) (mm-charset-to-coding-system charset nil t))))))
2672
2673 (defun article-de-base64-unreadable (&optional force read-charset)
2674   "Translate a base64 article.
2675 If FORCE, decode the article whether it is marked as base64 not.
2676 If READ-CHARSET, ask for a coding system."
2677   (interactive (list 'force current-prefix-arg))
2678   (save-excursion
2679     (let ((inhibit-read-only t) type charset)
2680       (if (gnus-buffer-live-p gnus-original-article-buffer)
2681           (with-current-buffer gnus-original-article-buffer
2682             (setq type
2683                   (gnus-fetch-field "content-transfer-encoding"))
2684             (let* ((ct (gnus-fetch-field "content-type"))
2685                    (ctl (and ct (mail-header-parse-content-type ct))))
2686               (setq charset (and ctl
2687                                  (mail-content-type-get ctl 'charset)))
2688               (if (stringp charset)
2689                   (setq charset (intern (downcase charset)))))))
2690       (if read-charset
2691           (setq charset (mm-read-coding-system "Charset: " charset)))
2692       (unless charset
2693         (setq charset gnus-newsgroup-charset))
2694       (when (or force
2695                 (and type (let ((case-fold-search t))
2696                             (string-match "base64" type))))
2697         (article-goto-body)
2698         (save-restriction
2699           (narrow-to-region (point) (point-max))
2700           (base64-decode-region (point-min) (point-max))
2701           (mm-decode-coding-region
2702            (point-min) (point-max)
2703            (mm-charset-to-coding-system charset nil t)))))))
2704
2705 (eval-when-compile
2706   (require 'rfc1843))
2707
2708 (defun article-decode-HZ ()
2709   "Translate a HZ-encoded article."
2710   (interactive)
2711   (require 'rfc1843)
2712   (save-excursion
2713     (let ((inhibit-read-only t))
2714       (rfc1843-decode-region (point-min) (point-max)))))
2715
2716 (defun article-unsplit-urls ()
2717   "Remove the newlines that some other mailers insert into URLs."
2718   (interactive)
2719   (save-excursion
2720     (let ((inhibit-read-only t))
2721       (goto-char (point-min))
2722       (while (re-search-forward
2723               "\\(\\(https?\\|ftp\\)://\\S-+\\) *\n\\(\\S-+\\)" nil t)
2724         (replace-match "\\1\\3" t)))
2725     (when (gmm-called-interactively-p 'any)
2726       (gnus-treat-article nil))))
2727
2728 (defun article-wash-html ()
2729   "Format an HTML article."
2730   (interactive)
2731   (let ((handles nil)
2732         (buffer-read-only nil))
2733     (when (gnus-buffer-live-p gnus-original-article-buffer)
2734       (with-current-buffer gnus-original-article-buffer
2735         (setq handles (mm-dissect-buffer t t))))
2736     (article-goto-body)
2737     (delete-region (point) (point-max))
2738     (mm-enable-multibyte)
2739     (mm-inline-text-html handles)))
2740
2741 (defvar gnus-article-browse-html-temp-list nil
2742   "List of temporary files created by `gnus-article-browse-html-parts'.
2743 Internal variable.")
2744
2745 (defcustom gnus-article-browse-delete-temp 'ask
2746   "What to do with temporary files from `gnus-article-browse-html-parts'.
2747 If nil, don't delete temporary files.  If it is t, delete them on
2748 exit from the summary buffer.  If it is the symbol `file', query
2749 on each file, if it is `ask' ask once when exiting from the
2750 summary buffer."
2751   :group 'gnus-article
2752   :version "23.1" ;; No Gnus
2753   :type '(choice (const :tag "Don't delete" nil)
2754                  (const :tag "Don't ask" t)
2755                  (const :tag "Ask" ask)
2756                  (const :tag "Ask for each file" file)))
2757
2758 ;; Cf. mm-postponed-undisplay-list / mm-destroy-postponed-undisplay-list.
2759
2760 (defun gnus-article-browse-delete-temp-files (&optional how)
2761   "Delete temp-files created by `gnus-article-browse-html-parts'."
2762   (when (and gnus-article-browse-html-temp-list
2763              (progn
2764                (or how (setq how gnus-article-browse-delete-temp))
2765                (if (eq how 'ask)
2766                    (let ((files (length gnus-article-browse-html-temp-list)))
2767                      (or (gnus-y-or-n-p
2768                           (if (= files 1)
2769                               "Delete the temporary HTML file? "
2770                             (format "Delete all %s temporary HTML files? "
2771                                     files)))
2772                          (setq gnus-article-browse-html-temp-list nil)))
2773                  how)))
2774     (dolist (file gnus-article-browse-html-temp-list)
2775       (cond ((file-directory-p file)
2776              (when (or (not (eq how 'file))
2777                        (gnus-y-or-n-p
2778                         (format
2779                          "Delete temporary HTML file(s) in directory `%s'? "
2780                          (file-name-as-directory file))))
2781                (gnus-delete-directory file)))
2782             ((file-exists-p file)
2783              (when (or (not (eq how 'file))
2784                        (gnus-y-or-n-p
2785                         (format "Delete temporary HTML file `%s'? " file)))
2786                (delete-file file)))))
2787     ;; Also remove file from the list when not deleted or if file doesn't
2788     ;; exist anymore.
2789     (setq gnus-article-browse-html-temp-list nil))
2790   gnus-article-browse-html-temp-list)
2791
2792 (defun gnus-article-browse-html-save-cid-content (cid handles directory)
2793   "Find CID content in HANDLES and save it in a file in DIRECTORY.
2794 Return file name."
2795   (save-match-data
2796     (let (file type)
2797       (catch 'found
2798         (dolist (handle handles)
2799           (cond
2800            ((not (listp handle)))
2801            ;; Exclude broken handles that `gnus-summary-enter-digest-group'
2802            ;; may create.
2803            ((not (or (bufferp (car handle)) (stringp (car handle)))))
2804            ((equal (mm-handle-media-supertype handle) "multipart")
2805             (when (setq file (gnus-article-browse-html-save-cid-content
2806                               cid handle directory))
2807               (throw 'found file)))
2808            ((equal (concat "<" cid ">") (mm-handle-id handle))
2809             (setq file
2810                   (expand-file-name
2811                    (or (mm-handle-filename handle)
2812                        (concat
2813                         (make-temp-name "cid")
2814                         (car (rassoc (car (mm-handle-type handle))
2815                                      mailcap-mime-extensions))))
2816                    directory))
2817             (mm-save-part-to-file handle file)
2818             (throw 'found file))))))))
2819
2820 (defun gnus-article-browse-html-parts (list &optional header)
2821   "View all \"text/html\" parts from LIST.
2822 Recurse into multiparts.  The optional HEADER that should be a decoded
2823 message header will be added to the bodies of the \"text/html\" parts."
2824   ;; Internal function used by `gnus-article-browse-html-article'.
2825   (let (type file charset content cid-dir tmp-file showed)
2826     ;; Find and show the html-parts.
2827     (dolist (handle list)
2828       ;; If HTML, show it:
2829       (cond ((not (listp handle)))
2830             ((or (equal (car (setq type (mm-handle-type handle))) "text/html")
2831                  (and (equal (car type) "message/external-body")
2832                       (or header
2833                           (setq file (mm-handle-filename handle)))
2834                       (or (mm-handle-cache handle)
2835                           (condition-case code
2836                               (progn (mm-extern-cache-contents handle) t)
2837                             (error
2838                              (gnus-message 3 "%s" (error-message-string code))
2839                              (when (>= gnus-verbose 3) (sit-for 2))
2840                              nil)))
2841                       (progn
2842                         (setq handle (mm-handle-cache handle)
2843                               type (mm-handle-type handle))
2844                         (equal (car type) "text/html"))))
2845              (setq charset (mail-content-type-get type 'charset)
2846                    content (mm-get-part handle))
2847              (with-temp-buffer
2848                (if (eq charset 'gnus-decoded)
2849                    (mm-enable-multibyte)
2850                  (mm-disable-multibyte))
2851                (insert content)
2852                ;; resolve cid contents
2853                (let ((case-fold-search t)
2854                      cid-file)
2855                  (goto-char (point-min))
2856                  (while (re-search-forward "\
2857 <img[\t\n ]+\\(?:[^\t\n >]+[\t\n ]+\\)*src=\"\\(cid:\\([^\"]+\\)\\)\""
2858                                            nil t)
2859                    (unless cid-dir
2860                      (setq cid-dir (mm-make-temp-file "cid" t))
2861                      (add-to-list 'gnus-article-browse-html-temp-list cid-dir))
2862                    (setq file nil
2863                          content nil)
2864                    (when (setq cid-file
2865                                (gnus-article-browse-html-save-cid-content
2866                                 (match-string 2)
2867                                 (with-current-buffer gnus-article-buffer
2868                                   gnus-article-mime-handles)
2869                                 cid-dir))
2870                      (when (eq system-type 'cygwin)
2871                        (setq cid-file
2872                              (concat "/" (substring
2873                                           (with-output-to-string
2874                                             (call-process "cygpath" nil
2875                                                           standard-output
2876                                                           nil "-m" cid-file))
2877                                           0 -1))))
2878                      (replace-match (concat "file://" cid-file)
2879                                     nil nil nil 1))))
2880                (unless content (setq content (buffer-string))))
2881              (when (or charset header (not file))
2882                (setq tmp-file (mm-make-temp-file
2883                                ;; Do we need to care for 8.3 filenames?
2884                                "mm-" nil ".html")))
2885              ;; Add a meta html tag to specify charset and a header.
2886              (cond
2887               (header
2888                (let (title eheader body hcharset coding)
2889                  (with-temp-buffer
2890                    (mm-enable-multibyte)
2891                    (setq case-fold-search t)
2892                    (insert header "\n")
2893                    (setq title (message-fetch-field "subject"))
2894                    (goto-char (point-min))
2895                    (while (re-search-forward "\\(<\\)\\|\\(>\\)\\|\\(&\\)\\|\n"
2896                                              nil t)
2897                      (replace-match (cond ((match-beginning 1) "&lt;")
2898                                           ((match-beginning 2) "&gt;")
2899                                           ((match-beginning 3) "&amp;")
2900                                           (t "<br>\n"))))
2901                    (goto-char (point-min))
2902                    (while (re-search-forward "^[\t ]+" nil t)
2903                      (dotimes (i (prog1
2904                                      (current-column)
2905                                    (delete-region (match-beginning 0)
2906                                                   (match-end 0))))
2907                        (insert "&nbsp;")))
2908                    (goto-char (point-min))
2909                    (insert "<div align=\"left\">\n")
2910                    (goto-char (point-max))
2911                    (insert "</div>\n<hr>\n")
2912                    ;; We have to examine charset one by one since
2913                    ;; charset specified in parts might be different.
2914                    (if (eq charset 'gnus-decoded)
2915                        (setq charset 'utf-8
2916                              eheader (mm-encode-coding-string (buffer-string)
2917                                                               charset)
2918                              title (when title
2919                                      (mm-encode-coding-string title charset))
2920                              body (mm-encode-coding-string content charset))
2921                      (setq hcharset (mm-find-mime-charset-region (point-min)
2922                                                                  (point-max)))
2923                      (cond ((= (length hcharset) 1)
2924                             (setq hcharset (car hcharset)
2925                                   coding (mm-charset-to-coding-system
2926                                           hcharset nil t)))
2927                            ((> (length hcharset) 1)
2928                             (setq hcharset 'utf-8
2929                                   coding hcharset)))
2930                      (if coding
2931                          (if charset
2932                              (progn
2933                                (setq body
2934                                      (mm-charset-to-coding-system charset
2935                                                                   nil t))
2936                                (if (eq coding body)
2937                                    (setq eheader (mm-encode-coding-string
2938                                                   (buffer-string) coding)
2939                                          title (when title
2940                                                  (mm-encode-coding-string
2941                                                   title coding))
2942                                          body content)
2943                                  (setq charset 'utf-8
2944                                        eheader (mm-encode-coding-string
2945                                                 (buffer-string) charset)
2946                                        title (when title
2947                                                (mm-encode-coding-string
2948                                                 title charset))
2949                                        body (mm-encode-coding-string
2950                                              (mm-decode-coding-string
2951                                               content body)
2952                                              charset))))
2953                            (setq charset hcharset
2954                                  eheader (mm-encode-coding-string
2955                                           (buffer-string) coding)
2956                                  title (when title
2957                                          (mm-encode-coding-string
2958                                           title coding))
2959                                  body content))
2960                        (setq eheader (mm-string-as-unibyte (buffer-string))
2961                              body content)))
2962                    (erase-buffer)
2963                    (mm-disable-multibyte)
2964                    (insert body)
2965                    (when charset
2966                      (mm-add-meta-html-tag handle charset t))
2967                    (when title
2968                      (goto-char (point-min))
2969                      (unless (search-forward "<title>" nil t)
2970                        (re-search-forward "<head>\\s-*" nil t)
2971                        (insert "<title>" title "</title>\n")))
2972                    (goto-char (point-min))
2973                    (or (re-search-forward
2974                         "<body\\(?:\\s-+[^>]+\\|\\s-*\\)>\\s-*" nil t)
2975                        (re-search-forward
2976                         "</head\\(?:\\s-+[^>]+\\|\\s-*\\)>\\s-*" nil t))
2977                    (insert eheader)
2978                    (mm-write-region (point-min) (point-max)
2979                                     tmp-file nil nil nil 'binary t))))
2980               (charset
2981                (mm-with-unibyte-buffer
2982                  (insert (if (eq charset 'gnus-decoded)
2983                              (mm-encode-coding-string content
2984                                                       (setq charset 'utf-8))
2985                            content))
2986                  (if (or (mm-add-meta-html-tag handle charset)
2987                          (not file))
2988                      (mm-write-region (point-min) (point-max)
2989                                       tmp-file nil nil nil 'binary t)
2990                    (setq tmp-file nil))))
2991               (tmp-file
2992                (mm-save-part-to-file handle tmp-file)))
2993              (when tmp-file
2994                (add-to-list 'gnus-article-browse-html-temp-list tmp-file))
2995              (add-hook 'gnus-summary-prepare-exit-hook
2996                        'gnus-article-browse-delete-temp-files)
2997              (add-hook 'gnus-exit-gnus-hook
2998                        (lambda  ()
2999                          (gnus-article-browse-delete-temp-files t)))
3000              ;; FIXME: Warn if there's an <img> tag?
3001              (browse-url-of-file (or tmp-file (expand-file-name file)))
3002              (setq showed t))
3003             ;; If multipart, recurse
3004             ((equal (mm-handle-media-supertype handle) "multipart")
3005              (when (gnus-article-browse-html-parts handle header)
3006                (setq showed t)))
3007             ((equal (mm-handle-media-type handle) "message/rfc822")
3008              (mm-with-multibyte-buffer
3009                (mm-insert-part handle)
3010                (setq handle (mm-dissect-buffer t t))
3011                (when (and (bufferp (car handle))
3012                           (stringp (car (mm-handle-type handle))))
3013                  (setq handle (list handle)))
3014                (when header
3015                  (article-decode-encoded-words)
3016                  (let ((gnus-visible-headers
3017                         (or (get 'gnus-visible-headers 'standard-value)
3018                             gnus-visible-headers)))
3019                    (article-hide-headers))
3020                  (goto-char (point-min))
3021                  (search-forward "\n\n" nil 'move)
3022                  (skip-chars-backward "\t\n ")
3023                  (setq header (buffer-substring (point-min) (point)))))
3024              (when (prog1
3025                        (gnus-article-browse-html-parts handle header)
3026                      (mm-destroy-parts handle))
3027                (setq showed t)))))
3028     showed))
3029
3030 (defun gnus-article-browse-html-article (&optional arg)
3031   "View \"text/html\" parts of the current article with a WWW browser.
3032 Inline images embedded in a message using the cid scheme, as they are
3033 generally considered to be safe, will be processed properly.
3034 The message header is added to the beginning of every html part unless
3035 the prefix argument ARG is given.
3036
3037 Warning: Spammers use links to images (using the http scheme) in HTML
3038 articles to verify whether you have read the message.  As
3039 `gnus-article-browse-html-article' passes the HTML content to the
3040 browser without eliminating these \"web bugs\" you should only
3041 use it for mails from trusted senders.
3042
3043 If you always want to display HTML parts in the browser, set
3044 `mm-text-html-renderer' to nil.
3045
3046 This command creates temporary files to pass HTML contents including
3047 images if any to the browser, and deletes them when exiting the group
3048 \(if you want)."
3049   ;; Cf. `mm-w3m-safe-url-regexp'
3050   (interactive "P")
3051   (if arg
3052       (gnus-summary-show-article)
3053     (let ((gnus-visible-headers (or (get 'gnus-visible-headers 'standard-value)
3054                                     gnus-visible-headers))
3055           ;; As we insert a <hr>, there's no need for the body boundary.
3056           (gnus-treat-body-boundary nil))
3057       (gnus-summary-show-article)))
3058   (with-current-buffer gnus-article-buffer
3059     (let ((header (unless arg
3060                     (save-restriction
3061                       (widen)
3062                       (buffer-substring-no-properties
3063                        (goto-char (point-min))
3064                        (if (search-forward "\n\n" nil t)
3065                            (match-beginning 0)
3066                          (goto-char (point-max))
3067                          (skip-chars-backward "\t\n ")
3068                          (point))))))
3069           parts)
3070       (set-buffer gnus-original-article-buffer)
3071       (setq parts (mm-dissect-buffer t t))
3072       ;; If singlepart, enforce a list.
3073       (when (and (bufferp (car parts))
3074                  (stringp (car (mm-handle-type parts))))
3075         (setq parts (list parts)))
3076       ;; Process the list
3077       (unless (gnus-article-browse-html-parts parts header)
3078         (gnus-error 3 "Mail doesn't contain a \"text/html\" part!"))
3079       (mm-destroy-parts parts)
3080       (unless arg
3081         (gnus-summary-show-article)))))
3082
3083 (defun article-hide-list-identifiers ()
3084   "Remove list identifies from the Subject header.
3085 The `gnus-list-identifiers' variable specifies what to do."
3086   (interactive)
3087   (let ((inhibit-point-motion-hooks t)
3088         (regexp (gnus-group-get-list-identifiers gnus-newsgroup-name))
3089         (inhibit-read-only t))
3090     (when regexp
3091       (save-excursion
3092         (save-restriction
3093           (article-narrow-to-head)
3094           (goto-char (point-min))
3095           (while (re-search-forward
3096                   (concat "^Subject: +\\(R[Ee]: +\\)*\\(" regexp " *\\)")
3097                   nil t)
3098             (delete-region (match-beginning 2) (match-end 0))
3099             (beginning-of-line))
3100           (when (re-search-forward
3101                  "^Subject: +\\(\\(R[Ee]: +\\)+\\)R[Ee]: +" nil t)
3102             (delete-region (match-beginning 1) (match-end 1))))))))
3103
3104 (defun article-hide-pem (&optional arg)
3105   "Toggle hiding of any PEM headers and signatures in the current article.
3106 If given a negative prefix, always show; if given a positive prefix,
3107 always hide."
3108   (interactive (gnus-article-hidden-arg))
3109   (unless (gnus-article-check-hidden-text 'pem arg)
3110     (save-excursion
3111       (let ((inhibit-read-only t) end)
3112         (goto-char (point-min))
3113         ;; Hide the horrendously ugly "header".
3114         (when (and (search-forward
3115                     "\n-----BEGIN PRIVACY-ENHANCED MESSAGE-----\n"
3116                     nil t)
3117                    (setq end (1+ (match-beginning 0))))
3118           (gnus-add-wash-type 'pem)
3119           (gnus-article-hide-text-type
3120            end
3121            (if (search-forward "\n\n" nil t)
3122                (match-end 0)
3123              (point-max))
3124            'pem)
3125           ;; Hide the trailer as well
3126           (when (search-forward "\n-----END PRIVACY-ENHANCED MESSAGE-----\n"
3127                                 nil t)
3128             (gnus-article-hide-text-type
3129              (match-beginning 0) (match-end 0) 'pem)))))))
3130
3131 (defun article-strip-banner ()
3132   "Strip the banners specified by the `banner' group parameter and by
3133 `gnus-article-address-banner-alist'."
3134   (interactive)
3135   (save-excursion
3136     (save-restriction
3137       (let ((inhibit-point-motion-hooks t))
3138         (when (gnus-parameter-banner gnus-newsgroup-name)
3139           (article-really-strip-banner
3140            (gnus-parameter-banner gnus-newsgroup-name)))
3141         (when gnus-article-address-banner-alist
3142           ;; Note that the From header is decoded here, so it is
3143           ;; required that the *-extract-address-components function
3144           ;; supports non-ASCII text.
3145           (let ((from (save-restriction
3146                         (widen)
3147                         (article-narrow-to-head)
3148                         (mail-fetch-field "from"))))
3149             (when (and from
3150                        (setq from
3151                              (cadr (funcall gnus-extract-address-components
3152                                             from))))
3153               (catch 'found
3154                 (dolist (pair gnus-article-address-banner-alist)
3155                   (when (string-match (car pair) from)
3156                     (throw 'found
3157                            (article-really-strip-banner (cdr pair)))))))))))))
3158
3159 (defun article-really-strip-banner (banner)
3160   "Strip the banner specified by the argument."
3161   (save-excursion
3162     (save-restriction
3163       (let ((inhibit-point-motion-hooks t)
3164             (gnus-signature-limit nil)
3165             (inhibit-read-only t))
3166         (article-goto-body)
3167         (cond
3168          ((eq banner 'signature)
3169           (when (gnus-article-narrow-to-signature)
3170             (widen)
3171             (forward-line -1)
3172             (delete-region (point) (point-max))))
3173          ((symbolp banner)
3174           (if (setq banner (cdr (assq banner gnus-article-banner-alist)))
3175               (while (re-search-forward banner nil t)
3176                 (delete-region (match-beginning 0) (match-end 0)))))
3177          ((stringp banner)
3178           (while (re-search-forward banner nil t)
3179             (delete-region (match-beginning 0) (match-end 0)))))))))
3180
3181 (defun article-babel ()
3182   "Translate article using an online translation service."
3183   (interactive)
3184   (require 'babel)
3185   (gnus-with-article-buffer
3186     (when (article-goto-body)
3187       (let* ((start (point))
3188              (end (point-max))
3189              (orig (buffer-substring start end))
3190              (trans (babel-as-string orig)))
3191         (save-restriction
3192           (narrow-to-region start end)
3193           (delete-region start end)
3194           (insert trans))))))
3195
3196 (defun article-hide-signature (&optional arg)
3197   "Hide the signature in the current article.
3198 If given a negative prefix, always show; if given a positive prefix,
3199 always hide."
3200   (interactive (gnus-article-hidden-arg))
3201   (unless (gnus-article-check-hidden-text 'signature arg)
3202     (save-excursion
3203       (save-restriction
3204         (let ((inhibit-read-only t))
3205           (when (gnus-article-narrow-to-signature)
3206             (gnus-article-hide-text-type
3207              (point-min) (point-max) 'signature))))))
3208   (gnus-set-mode-line 'article))
3209
3210 (defun article-strip-headers-in-body ()
3211   "Strip offensive headers from bodies."
3212   (interactive)
3213   (save-excursion
3214     (article-goto-body)
3215     (let ((case-fold-search t))
3216       (when (looking-at "x-no-archive:")
3217         (gnus-delete-line)))))
3218
3219 (defun article-strip-leading-blank-lines ()
3220   "Remove all blank lines from the beginning of the article."
3221   (interactive)
3222   (save-excursion
3223     (let ((inhibit-point-motion-hooks t)
3224           (inhibit-read-only t))
3225       (when (article-goto-body)
3226         (while (and (not (eobp))
3227                     (looking-at "[ \t]*$"))
3228           (gnus-delete-line))))))
3229
3230 (defun article-narrow-to-head ()
3231   "Narrow the buffer to the head of the message.
3232 Point is left at the beginning of the narrowed-to region."
3233   (narrow-to-region
3234    (goto-char (point-min))
3235    (cond
3236     ;; Absolutely no headers displayed.
3237     ((looking-at "\n")
3238      (point))
3239     ;; Normal headers.
3240     ((search-forward "\n\n" nil 1)
3241      (1- (point)))
3242     ;; Nothing but headers.
3243     (t
3244      (point-max))))
3245   (goto-char (point-min)))
3246
3247 (defun article-goto-body ()
3248   "Place point at the start of the body."
3249   (goto-char (point-min))
3250   (cond
3251    ;; This variable is only bound when dealing with separate
3252    ;; MIME body parts.
3253    (article-goto-body-goes-to-point-min-p
3254     t)
3255    ((search-forward "\n\n" nil t)
3256     t)
3257    (t
3258     (goto-char (point-max))
3259     nil)))
3260
3261 (defun article-strip-multiple-blank-lines ()
3262   "Replace consecutive blank lines with one empty line."
3263   (interactive)
3264   (save-excursion
3265     (let ((inhibit-point-motion-hooks t)
3266           (inhibit-read-only t))
3267       ;; First make all blank lines empty.
3268       (article-goto-body)
3269       (while (re-search-forward "^[ \t]+$" nil t)
3270         (unless (gnus-annotation-in-region-p
3271                  (match-beginning 0) (match-end 0))
3272           (replace-match "" nil t)))
3273       ;; Then replace multiple empty lines with a single empty line.
3274       (article-goto-body)
3275       (while (re-search-forward "\n\n\\(\n+\\)" nil t)
3276         (unless (gnus-annotation-in-region-p
3277                  (match-beginning 0) (match-end 0))
3278           (delete-region (match-beginning 1) (match-end 1)))))))
3279
3280 (defun article-strip-leading-space ()
3281   "Remove all white space from the beginning of the lines in the article."
3282   (interactive)
3283   (save-excursion
3284     (let ((inhibit-point-motion-hooks t)
3285           (inhibit-read-only t))
3286       (article-goto-body)
3287       (while (re-search-forward "^[ \t]+" nil t)
3288         (replace-match "" t t)))))
3289
3290 (defun article-strip-trailing-space ()
3291   "Remove all white space from the end of the lines in the article."
3292   (interactive)
3293   (save-excursion
3294     (let ((inhibit-point-motion-hooks t)
3295           (inhibit-read-only t))
3296       (article-goto-body)
3297       (while (re-search-forward "[ \t]+$" nil t)
3298         (replace-match "" t t)))))
3299
3300 (defun article-strip-blank-lines ()
3301   "Strip leading, trailing and multiple blank lines."
3302   (interactive)
3303   (article-strip-leading-blank-lines)
3304   (article-remove-trailing-blank-lines)
3305   (article-strip-multiple-blank-lines))
3306
3307 (defun article-strip-all-blank-lines ()
3308   "Strip all blank lines."
3309   (interactive)
3310   (save-excursion
3311     (let ((inhibit-point-motion-hooks t)
3312           (inhibit-read-only t))
3313       (article-goto-body)
3314       (while (re-search-forward "^[ \t]*\n" nil t)
3315         (replace-match "" t t)))))
3316
3317 (defun gnus-article-narrow-to-signature ()
3318   "Narrow to the signature; return t if a signature is found, else nil."
3319   (let ((inhibit-point-motion-hooks t))
3320     (when (gnus-article-search-signature)
3321       (forward-line 1)
3322       ;; Check whether we have some limits to what we consider
3323       ;; to be a signature.
3324       (let ((limits (if (listp gnus-signature-limit) gnus-signature-limit
3325                       (list gnus-signature-limit)))
3326             limit limited)
3327         (while (setq limit (pop limits))
3328           (if (or (and (integerp limit)
3329                        (< (- (point-max) (point)) limit))
3330                   (and (floatp limit)
3331                        (< (count-lines (point) (point-max)) limit))
3332                   (and (functionp limit)
3333                        (funcall limit))
3334                   (and (stringp limit)
3335                        (not (re-search-forward limit nil t))))
3336               ()                        ; This limit did not succeed.
3337             (setq limited t
3338                   limits nil)))
3339         (unless limited
3340           (narrow-to-region (point) (point-max))
3341           t)))))
3342
3343 (defun gnus-article-search-signature ()
3344   "Search the current buffer for the signature separator.
3345 Put point at the beginning of the signature separator."
3346   (let ((cur (point)))
3347     (goto-char (point-max))
3348     (if (if (stringp gnus-signature-separator)
3349             (re-search-backward gnus-signature-separator nil t)
3350           (let ((seps gnus-signature-separator))
3351             (while (and seps
3352                         (not (re-search-backward (car seps) nil t)))
3353               (pop seps))
3354             seps))
3355         t
3356       (goto-char cur)
3357       nil)))
3358
3359 (defun gnus-article-hidden-arg ()
3360   "Return the current prefix arg as a number, or 0 if no prefix."
3361   (list (if current-prefix-arg
3362             (prefix-numeric-value current-prefix-arg)
3363           0)))
3364
3365 (defun gnus-article-check-hidden-text (type arg)
3366   "Return nil if hiding is necessary.
3367 Arg can be nil or a number.  nil and positive means hide, negative
3368 means show, 0 means toggle."
3369   (save-excursion
3370     (save-restriction
3371       (let ((hide (gnus-article-hidden-text-p type)))
3372         (cond
3373          ((or (null arg)
3374               (> arg 0))
3375           nil)
3376          ((< arg 0)
3377           (gnus-article-show-hidden-text type)
3378           t)
3379          (t
3380           (if (eq hide 'hidden)
3381               (progn
3382                 (gnus-article-show-hidden-text type)
3383                 t)
3384             nil)))))))
3385
3386 (defun gnus-article-hidden-text-p (type)
3387   "Say whether the current buffer contains hidden text of type TYPE."
3388   (let ((pos (text-property-any (point-min) (point-max) 'article-type type)))
3389     (while (and pos
3390                 (not (get-text-property pos 'invisible))
3391                 (not (get-text-property pos 'dummy-invisible)))
3392       (setq pos
3393             (text-property-any (1+ pos) (point-max) 'article-type type)))
3394     (if pos
3395         'hidden
3396       nil)))
3397
3398 (defun gnus-article-show-hidden-text (type &optional dummy)
3399   "Show all hidden text of type TYPE.
3400 Originally it is hide instead of DUMMY."
3401   (let ((inhibit-read-only t)
3402         (inhibit-point-motion-hooks t))
3403     (gnus-remove-text-properties-when
3404      'article-type type
3405      (point-min) (point-max)
3406      (cons 'article-type (cons type
3407                                gnus-hidden-properties)))
3408     (gnus-delete-wash-type type)))
3409
3410 (defconst article-time-units
3411   `((year . ,(* 365.25 24 60 60))
3412     (week . ,(* 7 24 60 60))
3413     (day . ,(* 24 60 60))
3414     (hour . ,(* 60 60))
3415     (minute . 60)
3416     (second . 1))
3417   "Mapping from time units to seconds.")
3418
3419 (defun gnus-article-forward-header ()
3420   "Move point to the start of the next header.
3421 If the current header is a continuation header, this can be several
3422 lines forward."
3423   (let ((ended nil))
3424     (while (not ended)
3425       (forward-line 1)
3426       (if (looking-at "[ \t]+[^ \t]")
3427           (forward-line 1)
3428         (setq ended t)))))
3429
3430 (defun article-treat-date ()
3431   (article-date-ut (if (gnus-buffer-live-p gnus-summary-buffer)
3432                        (with-current-buffer gnus-summary-buffer
3433                          gnus-article-date-headers)
3434                      gnus-article-date-headers)
3435                    t))
3436
3437 (defun article-date-ut (&optional type highlight date-position)
3438   "Convert DATE date to TYPE in the current article.
3439 The default type is `ut'.  See `gnus-article-date-headers' for
3440 possible values."
3441   (interactive (list 'ut t))
3442   (let* ((case-fold-search t)
3443          (inhibit-read-only t)
3444          (inhibit-point-motion-hooks t)
3445          (first t)
3446          (visible-date (mail-fetch-field "Date"))
3447          pos date bface eface)
3448     (save-excursion
3449       (if date-position
3450           (progn
3451             (goto-char date-position)
3452             (setq date (get-text-property (point) 'original-date))
3453             (when (looking-at "[^:]+:[\t ]*")
3454               (setq bface (get-text-property (match-beginning 0) 'face)
3455                     eface (get-text-property (match-end 0) 'face)))
3456             (delete-region (point)
3457                            (progn
3458                              (gnus-article-forward-header)
3459                              (point)))
3460             (article-transform-date date type bface eface))
3461         (save-restriction
3462           (widen)
3463           (goto-char (point-min))
3464           (while (or (get-text-property (setq pos (point)) 'original-date)
3465                      (and (setq pos (next-single-property-change
3466                                      (point) 'original-date))
3467                           (goto-char pos)))
3468             (narrow-to-region pos (if (search-forward "\n\n" nil t)
3469                                       (1+ (match-beginning 0))
3470                                     (point-max)))
3471             (while (setq pos (text-property-not-all pos (point-max)
3472                                                     'gnus-date-type nil))
3473               (setq date (get-text-property pos 'original-date))
3474               (goto-char pos)
3475               (when (looking-at "[^:]+:[\t ]*")
3476                 (setq bface (get-text-property (match-beginning 0) 'face)
3477                       eface (get-text-property (match-end 0) 'face)))
3478               (delete-region pos (or (text-property-any pos (point-max)
3479                                                         'gnus-date-type nil)
3480                                      (point-max))))
3481             (unless date ;; the 1st time
3482               (goto-char (point-min))
3483               (while (re-search-forward "^Date:[\t ]*" nil t)
3484                 (setq date (get-text-property (match-beginning 0)
3485                                               'original-date)
3486                       bface (get-text-property (match-beginning 0) 'face)
3487                       eface (get-text-property (match-end 0) 'face))
3488                 (delete-region (point-at-bol) (progn
3489                                                 (gnus-article-forward-header)
3490                                                 (point)))))
3491             (when (and (not date)
3492                        visible-date)
3493               (setq date visible-date))
3494             (when date
3495               (article-transform-date date type bface eface))
3496             (goto-char (point-max))
3497             (widen)))))))
3498
3499 (defun article-transform-date (date type bface eface)
3500   (dolist (this-type (cond
3501                       ((null type)
3502                        (list 'ut))
3503                       ((atom type)
3504                        (list type))
3505                       (t
3506                        type)))
3507     (goto-char
3508      (prog1
3509          (point)
3510        (add-text-properties
3511         (point)
3512         (progn
3513           (insert (article-make-date-line date (or this-type 'ut)) "\n")
3514           (point))
3515         (list 'original-date date 'gnus-date-type this-type))))
3516     ;; Do highlighting.
3517     (when (looking-at
3518            "\\([^:]+:\\)[\t ]*\\(\\(?:[^\t\n ]+[\t ]+\\)*[^\t\n ]+\\)?")
3519       (put-text-property (match-beginning 1) (match-end 1) 'face bface)
3520       (when (match-beginning 2)
3521         (put-text-property (match-beginning 2) (match-end 2) 'face eface))
3522       (while (and (zerop (forward-line 1))
3523                   (looking-at "[\t ]+\\(\\(?:[^\t\n ]+[\t ]+\\)*[^\t\n ]+\\)?"))
3524         (when (match-beginning 1)
3525           (put-text-property (match-beginning 1) (match-end 1) 'face eface))))))
3526
3527 (defun article-make-date-line (date type)
3528   "Return a DATE line of TYPE."
3529   (unless (memq type '(local ut original user-defined iso8601 lapsed english
3530                              combined-lapsed))
3531     (error "Unknown conversion type: %s" type))
3532   (condition-case ()
3533       (let ((time (ignore-errors (date-to-time date))))
3534         (cond
3535          ;; Convert to the local timezone.
3536          ((eq type 'local)
3537           (concat "Date: " (message-make-date time)))
3538          ;; Convert to Universal Time.
3539          ((eq type 'ut)
3540           (concat "Date: "
3541                   (substring
3542                    (message-make-date
3543                     (let* ((e (parse-time-string date))
3544                            (tm (apply 'encode-time e))
3545                            (ms (car tm))
3546                            (ls (- (cadr tm) (car (current-time-zone time)))))
3547                       (cond ((< ls 0) (list (1- ms) (+ ls 65536)))
3548                             ((> ls 65535) (list (1+ ms) (- ls 65536)))
3549                             (t (list ms ls)))))
3550                    0 -5)
3551                   "UT"))
3552          ;; Get the original date from the article.
3553          ((eq type 'original)
3554           (concat "Date: " (if (string-match "\n+$" date)
3555                                (substring date 0 (match-beginning 0))
3556                              date)))
3557          ;; Let the user define the format.
3558          ((eq type 'user-defined)
3559           (let ((format (or (condition-case nil
3560                                 (with-current-buffer gnus-summary-buffer
3561                                   gnus-article-time-format)
3562                               (error nil))
3563                             gnus-article-time-format)))
3564             (if (functionp format)
3565                 (funcall format time)
3566               (concat "Date: " (format-time-string format time)))))
3567          ;; ISO 8601.
3568          ((eq type 'iso8601)
3569           (let ((tz (car (current-time-zone time))))
3570             (concat
3571              "Date: "
3572              (format-time-string "%Y%m%dT%H%M%S" time)
3573              (format "%s%02d%02d"
3574                      (if (> tz 0) "+" "-") (/ (abs tz) 3600)
3575                      (/ (% (abs tz) 3600) 60)))))
3576          ;; Do a lapsed format.
3577          ((eq type 'lapsed)
3578           (concat "Date: " (article-lapsed-string time)))
3579          ;; A combined date/lapsed format.
3580          ((eq type 'combined-lapsed)
3581           (let ((date-string (article-make-date-line date 'original))
3582                 (segments 3)
3583                 lapsed-string)
3584             (while (and
3585                     time
3586                     (setq lapsed-string
3587                           (concat " (" (article-lapsed-string time segments) ")"))
3588                     (> (+ (length date-string)
3589                           (length lapsed-string))
3590                        (+ fill-column 6))
3591                     (> segments 0))
3592               (setq segments (1- segments)))
3593             (if (> segments 0)
3594                 (concat date-string lapsed-string)
3595               date-string)))
3596          ;; Display the date in proper English
3597          ((eq type 'english)
3598           (let ((dtime (decode-time time)))
3599             (concat
3600              "Date: the "
3601              (number-to-string (nth 3 dtime))
3602              (let ((digit (% (nth 3 dtime) 10)))
3603                (cond
3604                 ((memq (nth 3 dtime) '(11 12 13)) "th")
3605                 ((= digit 1) "st")
3606                 ((= digit 2) "nd")
3607                 ((= digit 3) "rd")
3608                 (t "th")))
3609              " of "
3610              (nth (1- (nth 4 dtime)) gnus-english-month-names)
3611              " "
3612              (number-to-string (nth 5 dtime))
3613              " at "
3614              (format "%02d" (nth 2 dtime))
3615              ":"
3616              (format "%02d" (nth 1 dtime)))))))
3617     (foo
3618      (format "Date: %s (from Gnus)" date))))
3619
3620 (defun article-lapsed-string (time &optional max-segments)
3621   ;; If the date is seriously mangled, the timezone functions are
3622   ;; liable to bug out, so we ignore all errors.
3623   (let* ((now (current-time))
3624          (real-time (subtract-time now time))
3625          (real-sec (and real-time
3626                         (+ (* (float (car real-time)) 65536)
3627                            (cadr real-time))))
3628          (sec (and real-time (abs real-sec)))
3629          (segments 0)
3630          num prev)
3631     (unless max-segments
3632       (setq max-segments (length article-time-units)))
3633     (cond
3634      ((null real-time)
3635       "Unknown")
3636      ((zerop sec)
3637       "Now")
3638      (t
3639       (concat
3640        ;; This is a bit convoluted, but basically we go
3641        ;; through the time units for years, weeks, etc,
3642        ;; and divide things to see whether that results
3643        ;; in positive answers.
3644        (mapconcat
3645         (lambda (unit)
3646           (if (or (zerop (setq num (ffloor (/ sec (cdr unit)))))
3647                   (>= segments max-segments))
3648               ;; The (remaining) seconds are too few to
3649               ;; be divided into this time unit.
3650               ""
3651             ;; It's big enough, so we output it.
3652             (setq sec (- sec (* num (cdr unit))))
3653             (prog1
3654                 (concat (if prev ", " "") (int-to-string
3655                                            (floor num))
3656                         " " (symbol-name (car unit))
3657                         (if (> num 1) "s" ""))
3658               (setq prev t
3659                     segments (1+ segments)))))
3660         article-time-units "")
3661        ;; If dates are odd, then it might appear like the
3662        ;; article was sent in the future.
3663        (if (> real-sec 0)
3664            " ago"
3665          " in the future"))))))
3666
3667 (defun article-date-local (&optional highlight)
3668   "Convert the current article date to the local timezone."
3669   (interactive (list t))
3670   (article-date-ut 'local highlight))
3671
3672 (defun article-date-english (&optional highlight)
3673   "Convert the current article date to something that is proper English."
3674   (interactive (list t))
3675   (article-date-ut 'english highlight))
3676
3677 (defun article-date-original (&optional highlight)
3678   "Convert the current article date to what it was originally.
3679 This is only useful if you have used some other date conversion
3680 function and want to see what the date was before converting."
3681   (interactive (list t))
3682   (article-date-ut 'original highlight))
3683
3684 (defun article-date-lapsed (&optional highlight)
3685   "Convert the current article date to time lapsed since it was sent."
3686   (interactive (list t))
3687   (article-date-ut 'lapsed highlight))
3688
3689 (defun article-date-combined-lapsed (&optional highlight)
3690   "Convert the current article date to time lapsed since it was sent."
3691   (interactive (list t))
3692   (article-date-ut 'combined-lapsed highlight))
3693
3694 (defun article-update-date-lapsed ()
3695   "Function to be run from a timer to update the lapsed time line."
3696   (save-match-data
3697     (let ((buffer (current-buffer)))
3698       (ignore-errors
3699         (walk-windows
3700          (lambda (w)
3701            (set-buffer (window-buffer w))
3702            (when (derived-mode-p 'gnus-article-mode)
3703              (let ((old-line (count-lines (point-min) (point)))
3704                    (old-column (- (point) (line-beginning-position)))
3705                    (window-start (window-start w))
3706                    (pos (point-min))
3707                    type next end)
3708                (while (setq pos (text-property-not-all pos (point-max)
3709                                                        'gnus-date-type nil))
3710                  (setq next (or (next-single-property-change pos
3711                                                              'gnus-date-type)
3712                                 (point-max)))
3713                  (setq type (get-text-property pos 'gnus-date-type))
3714                  (when (memq type '(lapsed combined-lapsed user-defined))
3715                    (article-date-ut type t pos)
3716                    (setq end (or (next-single-property-change pos
3717                                                               'gnus-date-type)
3718                                  (point-max)))
3719                    (when window-start
3720                      (if (/= window-start next)
3721                          (setq window-start nil)
3722                        (set-window-start w end)))
3723                    (setq next end))
3724                  (setq pos next))
3725                (goto-char (point-min))
3726                (when (> old-column 0)
3727                  (setq old-line (1- old-line)))
3728                (forward-line old-line)
3729                (end-of-line)
3730                (when (> (current-column) old-column)
3731                  (beginning-of-line)
3732                  (forward-char old-column)))))
3733          nil 'visible))
3734       (set-buffer buffer))))
3735
3736 (defun gnus-start-date-timer (&optional n)
3737   "Start a timer to update the Date headers in the article buffers.
3738 The numerical prefix says how frequently (in seconds) the function
3739 is to run."
3740   (interactive "p")
3741   (unless n
3742     (setq n 1))
3743   (gnus-stop-date-timer)
3744   (setq article-lapsed-timer
3745         (run-at-time 1 n 'article-update-date-lapsed)))
3746
3747 (defun gnus-stop-date-timer ()
3748   "Stop the Date timer."
3749   (interactive)
3750   (when article-lapsed-timer
3751     (nnheader-cancel-timer article-lapsed-timer)
3752     (setq article-lapsed-timer nil)))
3753
3754 (defun article-date-user (&optional highlight)
3755   "Convert the current article date to the user-defined format.
3756 This format is defined by the `gnus-article-time-format' variable."
3757   (interactive (list t))
3758   (article-date-ut 'user highlight))
3759
3760 (defun article-date-iso8601 (&optional highlight)
3761   "Convert the current article date to ISO8601."
3762   (interactive (list t))
3763   (article-date-ut 'iso8601 highlight))
3764
3765 (defmacro gnus-article-save-original-date (&rest forms)
3766   "Save the original date as a text property and evaluate FORMS."
3767   `(let* ((case-fold-search t)
3768           (start (progn
3769                    (goto-char (point-min))
3770                    (when (and (re-search-forward "^date:[\t\n ]+" nil t)
3771                               (not (bolp)))
3772                      (match-end 0))))
3773           (date (when (and start
3774                            (re-search-forward "[\t ]*\n\\(?:[^\t ]\\|\\'\\)"
3775                                               nil t))
3776                   (buffer-substring-no-properties start
3777                                                   (match-beginning 0)))))
3778      (goto-char (point-max))
3779      (skip-chars-backward "\n")
3780      (put-text-property (point-min) (point) 'original-date date)
3781      ,@forms
3782      (goto-char (point-max))
3783      (skip-chars-backward "\n")
3784      (put-text-property (point-min) (point) 'original-date date)))
3785
3786 ;; (defun article-show-all ()
3787 ;;   "Show all hidden text in the article buffer."
3788 ;;   (interactive)
3789 ;;   (save-excursion
3790 ;;     (let ((inhibit-read-only t))
3791 ;;       (gnus-article-unhide-text (point-min) (point-max)))))
3792
3793 (defun article-remove-leading-whitespace ()
3794   "Remove excessive whitespace from all headers."
3795   (interactive)
3796   (save-excursion
3797     (save-restriction
3798       (let ((inhibit-read-only t))
3799         (article-narrow-to-head)
3800         (goto-char (point-min))
3801         (while (re-search-forward "^[^ :]+: \\([ \t]+\\)" nil t)
3802           (delete-region (match-beginning 1) (match-end 1)))))))
3803
3804 (defun article-emphasize (&optional arg)
3805   "Emphasize text according to `gnus-emphasis-alist'."
3806   (interactive (gnus-article-hidden-arg))
3807   (unless (gnus-article-check-hidden-text 'emphasis arg)
3808     (save-excursion
3809       (let ((alist (or
3810                     (condition-case nil
3811                         (with-current-buffer gnus-summary-buffer
3812                           gnus-article-emphasis-alist)
3813                       (error))
3814                     gnus-emphasis-alist))
3815             (inhibit-read-only t)
3816             (props (append '(article-type emphasis)
3817                            gnus-hidden-properties))
3818             regexp elem beg invisible visible face)
3819         (article-goto-body)
3820         (setq beg (point))
3821         (while (setq elem (pop alist))
3822           (goto-char beg)
3823           (setq regexp (car elem)
3824                 invisible (nth 1 elem)
3825                 visible (nth 2 elem)
3826                 face (nth 3 elem))
3827           (while (re-search-forward regexp nil t)
3828             (when (and (match-beginning visible) (match-beginning invisible))
3829               (gnus-article-hide-text
3830                (match-beginning invisible) (match-end invisible) props)
3831               (gnus-article-unhide-text-type
3832                (match-beginning visible) (match-end visible) 'emphasis)
3833               (gnus-put-overlay-excluding-newlines
3834                (match-beginning visible) (match-end visible) 'face face)
3835               (gnus-add-wash-type 'emphasis)
3836               (goto-char (match-end invisible)))))))))
3837
3838 (defun gnus-article-setup-highlight-words (&optional highlight-words)
3839   "Setup newsgroup emphasis alist."
3840   (unless gnus-article-emphasis-alist
3841     (let ((name (and gnus-newsgroup-name
3842                      (gnus-group-real-name gnus-newsgroup-name))))
3843       (make-local-variable 'gnus-article-emphasis-alist)
3844       (setq gnus-article-emphasis-alist
3845             (nconc
3846              (let ((alist gnus-group-highlight-words-alist) elem highlight)
3847                (while (setq elem (pop alist))
3848                  (when (and name (string-match (car elem) name))
3849                    (setq alist nil
3850                          highlight (copy-sequence (cdr elem)))))
3851                highlight)
3852              (copy-sequence highlight-words)
3853              (if gnus-newsgroup-name
3854                  (copy-sequence (gnus-group-find-parameter
3855                                  gnus-newsgroup-name 'highlight-words t)))
3856              gnus-emphasis-alist)))))
3857
3858 (defvar gnus-summary-article-menu)
3859 (defvar gnus-summary-post-menu)
3860
3861 ;;; Saving functions.
3862
3863 (defun gnus-article-save (save-buffer file &optional num)
3864   "Save the currently selected article."
3865   (when (or (get gnus-default-article-saver :headers)
3866             (not gnus-save-all-headers))
3867     ;; Remove headers according to `gnus-saved-headers' or the value
3868     ;; of the `:headers' property that the saver function might have.
3869     (let ((gnus-visible-headers
3870            (or (symbol-value (get gnus-default-article-saver :headers))
3871                gnus-saved-headers gnus-visible-headers))
3872           ;; Ignore group parameter.  See `article-hide-headers'.
3873           (gnus-summary-buffer nil))
3874       (with-current-buffer save-buffer
3875         (article-hide-headers 1 t))))
3876   (save-window-excursion
3877     (if (not gnus-default-article-saver)
3878         (error "No default saver is defined")
3879       ;; !!! Magic!  The saving functions all save
3880       ;; `gnus-save-article-buffer' (or so they think), but we
3881       ;; bind that variable to our save-buffer.
3882       (set-buffer gnus-article-buffer)
3883       (let* ((gnus-save-article-buffer save-buffer)
3884              (filename
3885               (cond
3886                ((not gnus-prompt-before-saving) 'default)
3887                ((eq gnus-prompt-before-saving 'always) nil)
3888                (t file)))
3889              (gnus-number-of-articles-to-be-saved
3890               (when (eq gnus-prompt-before-saving t)
3891                 num)))                  ; Magic
3892         (set-buffer gnus-article-current-summary)
3893         (funcall gnus-default-article-saver filename)))))
3894
3895 (defun gnus-read-save-file-name (prompt &optional filename
3896                                         function group headers variable
3897                                         dir-var)
3898   (let ((default-name
3899           (funcall function group headers (symbol-value variable)))
3900         result)
3901     (setq result
3902           (expand-file-name
3903            (cond
3904             ((eq filename 'default)
3905              default-name)
3906             ((eq filename t)
3907              default-name)
3908             (filename filename)
3909             (t
3910              (when (symbol-value dir-var)
3911                (setq default-name (expand-file-name
3912                                    (file-name-nondirectory default-name)
3913                                    (symbol-value dir-var))))
3914              (let* ((split-name (gnus-get-split-value gnus-split-methods))
3915                     (prompt
3916                      (format prompt
3917                              (if (and gnus-number-of-articles-to-be-saved
3918                                       (> gnus-number-of-articles-to-be-saved 1))
3919                                  (format "these %d articles"
3920                                          gnus-number-of-articles-to-be-saved)
3921                                "this article")))
3922                     (file
3923                      ;; Let the split methods have their say.
3924                      (cond
3925                       ;; No split name was found.
3926                       ((null split-name)
3927                        (read-file-name
3928                         (concat prompt " (default "
3929                                 (file-name-nondirectory default-name) "): ")
3930                         (file-name-directory default-name)
3931                         default-name))
3932                       ;; A single group name is returned.
3933                       ((stringp split-name)
3934                        (setq default-name
3935                              (funcall function split-name headers
3936                                       (symbol-value variable)))
3937                        (read-file-name
3938                         (concat prompt " (default "
3939                                 (file-name-nondirectory default-name) "): ")
3940                         (file-name-directory default-name)
3941                         default-name))
3942                       ;; A single split name was found
3943                       ((= 1 (length split-name))
3944                        (let* ((name (expand-file-name
3945                                      (car split-name)
3946                                      gnus-article-save-directory))
3947                               (dir (cond ((file-directory-p name)
3948                                           (file-name-as-directory name))
3949                                          ((file-exists-p name) name)
3950                                          (t gnus-article-save-directory))))
3951                          (read-file-name
3952                           (concat prompt " (default " name "): ")
3953                           dir name)))
3954                       ;; A list of splits was found.
3955                       (t
3956                        (setq split-name (nreverse split-name))
3957                        (let (result)
3958                          (let ((file-name-history
3959                                 (nconc split-name file-name-history)))
3960                            (setq result
3961                                  (expand-file-name
3962                                   (read-file-name
3963                                    (concat prompt " (`M-p' for defaults): ")
3964                                    gnus-article-save-directory
3965                                    (car split-name))
3966                                   gnus-article-save-directory)))
3967                          (car (push result file-name-history)))))))
3968                ;; Create the directory.
3969                (gnus-make-directory (file-name-directory file))
3970                ;; If we have read a directory, we append the default file name.
3971                (when (file-directory-p file)
3972                  (setq file (expand-file-name (file-name-nondirectory
3973                                                default-name)
3974                                               (file-name-as-directory file))))
3975                ;; Possibly translate some characters.
3976                (nnheader-translate-file-chars file))))))
3977     (gnus-make-directory (file-name-directory result))
3978     (when variable
3979       (set variable result))
3980     (when dir-var
3981       (set dir-var (file-name-directory result)))
3982     result))
3983
3984 (defun gnus-article-archive-name (group)
3985   "Return the first instance of an \"Archive-name\" in the current buffer."
3986   (let ((case-fold-search t))
3987     (when (re-search-forward "archive-name: *\\([^ \n\t]+\\)[ \t]*$" nil t)
3988       (nnheader-concat gnus-article-save-directory
3989                        (match-string 1)))))
3990
3991 (defun gnus-article-nndoc-name (group)
3992   "If GROUP is an nndoc group, return the name of the parent group."
3993   (when (eq (car (gnus-find-method-for-group group)) 'nndoc)
3994     (gnus-group-get-parameter group 'save-article-group)))
3995
3996 (defun gnus-summary-save-in-rmail (&optional filename)
3997   "Append this article to Rmail file.
3998 Optional argument FILENAME specifies file name.
3999 Directory to save to is default to `gnus-article-save-directory'."
4000   (setq filename (gnus-read-save-file-name
4001                   "Save %s in rmail file" filename
4002                   gnus-rmail-save-name gnus-newsgroup-name
4003                   gnus-current-headers 'gnus-newsgroup-last-rmail))
4004   (with-current-buffer gnus-save-article-buffer
4005     (save-excursion
4006       (save-restriction
4007         (widen)
4008         ;; Note that unlike gnus-summary-save-in-mail, there is no
4009         ;; check to see if filename is Babyl.  Rmail in Emacs 23 does
4010         ;; not use Babyl.
4011         (gnus-output-to-rmail filename))))
4012   filename)
4013
4014 (defun gnus-summary-save-in-mail (&optional filename)
4015   "Append this article to Unix mail file.
4016 Optional argument FILENAME specifies file name.
4017 Directory to save to is default to `gnus-article-save-directory'."
4018   (setq filename (gnus-read-save-file-name
4019                   "Save %s in Unix mail file" filename
4020                   gnus-mail-save-name gnus-newsgroup-name
4021                   gnus-current-headers 'gnus-newsgroup-last-mail))
4022   (with-current-buffer gnus-save-article-buffer
4023     (save-excursion
4024       (save-restriction
4025         (widen)
4026         (if (and (file-readable-p filename)
4027                  (file-regular-p filename)
4028                  (mail-file-babyl-p filename))
4029             (gnus-output-to-rmail filename)
4030           (gnus-output-to-mail filename)))))
4031   filename)
4032
4033 (put 'gnus-summary-save-in-file :decode t)
4034 (put 'gnus-summary-save-in-file :headers 'gnus-saved-headers)
4035 (defun gnus-summary-save-in-file (&optional filename overwrite)
4036   "Append this article to file.
4037 Optional argument FILENAME specifies file name.
4038 Directory to save to is default to `gnus-article-save-directory'."
4039   (setq filename (gnus-read-save-file-name
4040                   "Save %s in file" filename
4041                   gnus-file-save-name gnus-newsgroup-name
4042                   gnus-current-headers 'gnus-newsgroup-last-file))
4043   (with-current-buffer gnus-save-article-buffer
4044     (save-excursion
4045       (save-restriction
4046         (widen)
4047         (when (and overwrite
4048                    (file-exists-p filename))
4049           (delete-file filename))
4050         (gnus-output-to-file filename))))
4051   filename)
4052
4053 (put 'gnus-summary-write-to-file :decode t)
4054 (put 'gnus-summary-write-to-file :function 'gnus-summary-save-in-file)
4055 (put 'gnus-summary-write-to-file :headers 'gnus-saved-headers)
4056 (defun gnus-summary-write-to-file (&optional filename)
4057   "Write this article to a file, overwriting it if the file exists.
4058 Optional argument FILENAME specifies file name.
4059 The directory to save in defaults to `gnus-article-save-directory'."
4060   (setq filename (gnus-read-save-file-name
4061                   "Save %s in file" filename
4062                   gnus-file-save-name gnus-newsgroup-name
4063                   gnus-current-headers nil 'gnus-newsgroup-last-directory))
4064   (gnus-summary-save-in-file filename t))
4065
4066 (put 'gnus-summary-save-body-in-file :decode t)
4067 (defun gnus-summary-save-body-in-file (&optional filename overwrite)
4068   "Append this article body to a file.
4069 Optional argument FILENAME specifies file name.
4070 The directory to save in defaults to `gnus-article-save-directory'."
4071   (setq filename (gnus-read-save-file-name
4072                   "Save %s body in file" filename
4073                   gnus-file-save-name gnus-newsgroup-name
4074                   gnus-current-headers 'gnus-newsgroup-last-file))
4075   (with-current-buffer gnus-save-article-buffer
4076     (save-excursion
4077       (save-restriction
4078         (widen)
4079         (when (article-goto-body)
4080           (narrow-to-region (point) (point-max)))
4081         (when (and overwrite
4082                    (file-exists-p filename))
4083           (delete-file filename))
4084         (gnus-output-to-file filename))))
4085   filename)
4086
4087 (put 'gnus-summary-write-body-to-file :decode t)
4088 (put 'gnus-summary-write-body-to-file
4089      :function 'gnus-summary-save-body-in-file)
4090 (defun gnus-summary-write-body-to-file (&optional filename)
4091   "Write this article body to a file, overwriting it if the file exists.
4092 Optional argument FILENAME specifies file name.
4093 The directory to save in defaults to `gnus-article-save-directory'."
4094   (setq filename (gnus-read-save-file-name
4095                   "Save %s body in file" filename
4096                   gnus-file-save-name gnus-newsgroup-name
4097                   gnus-current-headers nil 'gnus-newsgroup-last-directory))
4098   (gnus-summary-save-body-in-file filename t))
4099
4100 (put 'gnus-summary-save-in-pipe :decode t)
4101 (put 'gnus-summary-save-in-pipe :headers 'gnus-saved-headers)
4102 (defun gnus-summary-save-in-pipe (&optional command raw)
4103   "Pipe this article to subprocess COMMAND.
4104 Valid values for COMMAND include:
4105   a string
4106     The executable command name and possibly arguments.
4107   nil
4108     You will be prompted for the command in the minibuffer.
4109   the symbol `default'
4110     It will be replaced with the command which the variable
4111     `gnus-summary-pipe-output-default-command' holds or the command
4112     last used for saving.
4113 Non-nil value for RAW overrides `:decode' and `:headers' properties
4114 and the raw article including all headers will be piped."
4115   (let ((article (gnus-summary-article-number))
4116         (decode (unless raw
4117                   (get 'gnus-summary-save-in-pipe :decode)))
4118         save-buffer default)
4119     (if article
4120         (if (vectorp (gnus-summary-article-header article))
4121             (save-current-buffer
4122               (gnus-summary-select-article decode decode nil article)
4123               (insert-buffer-substring
4124                (prog1
4125                    (if decode
4126                        gnus-article-buffer
4127                      gnus-original-article-buffer)
4128                  (setq save-buffer
4129                        (nnheader-set-temp-buffer " *Gnus Save*"))))
4130               ;; Remove unwanted headers.
4131               (when (and (not raw)
4132                          (or (get 'gnus-summary-save-in-pipe :headers)
4133                              (not gnus-save-all-headers)))
4134                 (let ((gnus-visible-headers
4135                        (or (symbol-value (get 'gnus-summary-save-in-pipe
4136                                               :headers))
4137                            gnus-saved-headers gnus-visible-headers))
4138                       (gnus-summary-buffer nil))
4139                   (article-hide-headers 1 t))))
4140           (error "%d is not a real article" article))
4141       (error "No article to pipe"))
4142     (setq default (or gnus-summary-pipe-output-default-command
4143                       gnus-last-shell-command))
4144     (unless (stringp command)
4145       (setq command
4146             (if (and (eq command 'default) default)
4147                 default
4148               (gnus-read-shell-command "Shell command on this article: "
4149                                        default))))
4150     (when (string-equal command "")
4151       (if default
4152           (setq command default)
4153         (error "A command is required")))
4154     (with-current-buffer save-buffer
4155       (save-restriction
4156         (widen)
4157         (shell-command-on-region (point-min) (point-max) command nil)))
4158     (gnus-kill-buffer save-buffer))
4159   (setq gnus-summary-pipe-output-default-command command))
4160
4161 (defun gnus-summary-pipe-to-muttprint (&optional command)
4162   "Pipe this article to muttprint."
4163   (unless (stringp command)
4164     (setq command (read-string
4165                    "Print using command: " gnus-summary-muttprint-program
4166                    nil gnus-summary-muttprint-program)))
4167   (let ((gnus-summary-pipe-output-default-command
4168          gnus-summary-pipe-output-default-command))
4169     (gnus-summary-save-in-pipe command))
4170   (setq gnus-summary-muttprint-program command))
4171
4172 ;;; Article file names when saving.
4173
4174 (defun gnus-capitalize-newsgroup (newsgroup)
4175   "Capitalize NEWSGROUP name."
4176   (when (not (zerop (length newsgroup)))
4177     (concat (char-to-string (upcase (aref newsgroup 0)))
4178             (substring newsgroup 1))))
4179
4180 (defun gnus-Numeric-save-name (newsgroup headers &optional last-file)
4181   "Generate file name from NEWSGROUP, HEADERS, and optional LAST-FILE.
4182 If variable `gnus-use-long-file-name' is non-nil, it is ~/News/News.group/num.
4183 Otherwise, it is like ~/News/news/group/num."
4184   (let ((default
4185           (expand-file-name
4186            (concat (if (gnus-use-long-file-name 'not-save)
4187                        (gnus-capitalize-newsgroup newsgroup)
4188                      (gnus-newsgroup-directory-form newsgroup))
4189                    "/" (int-to-string (mail-header-number headers)))
4190            gnus-article-save-directory)))
4191     (if (and last-file
4192              (string-equal (file-name-directory default)
4193                            (file-name-directory last-file))
4194              (string-match "^[0-9]+$" (file-name-nondirectory last-file)))
4195         default
4196       (or last-file default))))
4197
4198 (defun gnus-numeric-save-name (newsgroup headers &optional last-file)
4199   "Generate file name from NEWSGROUP, HEADERS, and optional LAST-FILE.
4200 If variable `gnus-use-long-file-name' is non-nil, it is
4201 ~/News/news.group/num.  Otherwise, it is like ~/News/news/group/num."
4202   (let ((default
4203           (expand-file-name
4204            (concat (if (gnus-use-long-file-name 'not-save)
4205                        newsgroup
4206                      (gnus-newsgroup-directory-form newsgroup))
4207                    "/" (int-to-string (mail-header-number headers)))
4208            gnus-article-save-directory)))
4209     (if (and last-file
4210              (string-equal (file-name-directory default)
4211                            (file-name-directory last-file))
4212              (string-match "^[0-9]+$" (file-name-nondirectory last-file)))
4213         default
4214       (or last-file default))))
4215
4216 (defun gnus-plain-save-name (newsgroup headers &optional last-file)
4217   "Generate file name from NEWSGROUP, HEADERS, and optional LAST-FILE.
4218 If variable `gnus-use-long-file-name' is non-nil, it is
4219 ~/News/news.group.  Otherwise, it is like ~/News/news/group/news."
4220   (or last-file
4221       (expand-file-name
4222        (if (gnus-use-long-file-name 'not-save)
4223            newsgroup
4224          (file-relative-name
4225           (expand-file-name "news" (gnus-newsgroup-directory-form newsgroup))
4226           default-directory))
4227        gnus-article-save-directory)))
4228
4229 (defun gnus-sender-save-name (newsgroup headers &optional last-file)
4230   "Generate file name from sender."
4231   (let ((from (mail-header-from headers)))
4232     (expand-file-name
4233      (if (and from (string-match "\\([^ <]+\\)@" from))
4234          (match-string 1 from)
4235        "nobody")
4236      gnus-article-save-directory)))
4237
4238 (defun article-verify-x-pgp-sig ()
4239   "Verify X-PGP-Sig."
4240   ;; <ftp://ftp.isc.org/pub/pgpcontrol/FORMAT>
4241   (interactive)
4242   (if (gnus-buffer-live-p gnus-original-article-buffer)
4243       (let ((sig (with-current-buffer gnus-original-article-buffer
4244                    (gnus-fetch-field "X-PGP-Sig")))
4245             items info headers)
4246         (when (and sig
4247                    mml2015-use
4248                    (mml2015-clear-verify-function))
4249           (with-temp-buffer
4250             (insert-buffer-substring gnus-original-article-buffer)
4251             (setq items (split-string sig))
4252             (message-narrow-to-head)
4253             (let ((inhibit-point-motion-hooks t)
4254                   (case-fold-search t))
4255               ;; Don't verify multiple headers.
4256               (setq headers (mapconcat (lambda (header)
4257                                          (concat header ": "
4258                                                  (mail-fetch-field header)
4259                                                  "\n"))
4260                                        (split-string (nth 1 items) ",") "")))
4261             (delete-region (point-min) (point-max))
4262             (insert "-----BEGIN PGP SIGNED MESSAGE-----\n\n")
4263             (insert "X-Signed-Headers: " (nth 1 items) "\n")
4264             (insert headers)
4265             (widen)
4266             (forward-line)
4267             (while (not (eobp))
4268               (if (looking-at "^-")
4269                   (insert "- "))
4270               (forward-line))
4271             (insert "\n-----BEGIN PGP SIGNATURE-----\n")
4272             (insert "Version: " (car items) "\n\n")
4273             (insert (mapconcat 'identity (cddr items) "\n"))
4274             (insert "\n-----END PGP SIGNATURE-----\n")
4275             (let ((mm-security-handle (list (format "multipart/signed"))))
4276               (mml2015-clean-buffer)
4277               (let ((coding-system-for-write (or gnus-newsgroup-charset
4278                                                  'iso-8859-1)))
4279                 (funcall (mml2015-clear-verify-function)))
4280               (setq info
4281                     (or (mm-handle-multipart-ctl-parameter
4282                          mm-security-handle 'gnus-details)
4283                         (mm-handle-multipart-ctl-parameter
4284                          mm-security-handle 'gnus-info)))))
4285           (when info
4286             (let ((inhibit-read-only t) bface eface)
4287               (save-restriction
4288                 (message-narrow-to-head)
4289                 (goto-char (point-max))
4290                 (forward-line -1)
4291                 (setq bface (get-text-property (point-at-bol) 'face)
4292                       eface (get-text-property (1- (point-at-eol)) 'face))
4293                 (message-remove-header "X-Gnus-PGP-Verify")
4294                 (if (re-search-forward "^X-PGP-Sig:" nil t)
4295                     (forward-line)
4296                   (goto-char (point-max)))
4297                 (narrow-to-region (point) (point))
4298                 (insert "X-Gnus-PGP-Verify: " info "\n")
4299                 (goto-char (point-min))
4300                 (forward-line)
4301                 (while (not (eobp))
4302                   (if (not (looking-at "^[ \t]"))
4303                       (insert " "))
4304                   (forward-line))
4305                 ;; Do highlighting.
4306                 (goto-char (point-min))
4307                 (when (looking-at "\\([^:]+\\): *")
4308                   (put-text-property (match-beginning 1) (1+ (match-end 1))
4309                                      'face bface)
4310                   (put-text-property (match-end 0) (point-max)
4311                                      'face eface)))))))))
4312
4313 (autoload 'canlock-verify "canlock" nil t) ;; for XEmacs.
4314
4315 (defun article-verify-cancel-lock ()
4316   "Verify Cancel-Lock header."
4317   (interactive)
4318   (if (gnus-buffer-live-p gnus-original-article-buffer)
4319       (canlock-verify gnus-original-article-buffer)))
4320
4321 (eval-and-compile
4322   (mapc
4323    (lambda (func)
4324      (let (afunc gfunc)
4325        (if (consp func)
4326            (setq afunc (car func)
4327                  gfunc (cdr func))
4328          (setq afunc func
4329                gfunc (intern (format "gnus-%s" func))))
4330        (defalias gfunc
4331          (when (fboundp afunc)
4332            `(lambda (&optional interactive &rest args)
4333               ,(documentation afunc t)
4334               (interactive (list t))
4335               (with-current-buffer gnus-article-buffer
4336                 (if interactive
4337                     (call-interactively ',afunc)
4338                   (apply ',afunc args))))))))
4339    '(article-hide-headers
4340      article-verify-x-pgp-sig
4341      article-verify-cancel-lock
4342      article-hide-boring-headers
4343      article-treat-overstrike
4344      article-treat-ansi-sequences
4345      article-fill-long-lines
4346      article-capitalize-sentences
4347      article-remove-cr
4348      article-remove-leading-whitespace
4349      article-display-x-face
4350      article-display-face
4351      article-de-quoted-unreadable
4352      article-de-base64-unreadable
4353      article-decode-HZ
4354      article-wash-html
4355      article-unsplit-urls
4356      article-hide-list-identifiers
4357      article-strip-banner
4358      article-babel
4359      article-hide-pem
4360      article-hide-signature
4361      article-strip-headers-in-body
4362      article-remove-trailing-blank-lines
4363      article-strip-leading-blank-lines
4364      article-strip-multiple-blank-lines
4365      article-strip-leading-space
4366      article-strip-trailing-space
4367      article-strip-blank-lines
4368      article-strip-all-blank-lines
4369      article-date-local
4370      article-date-english
4371      article-date-iso8601
4372      article-date-original
4373      article-treat-date
4374      article-date-ut
4375      article-decode-mime-words
4376      article-decode-charset
4377      article-decode-encoded-words
4378      article-date-user
4379      article-date-lapsed
4380      article-date-combined-lapsed
4381      article-emphasize
4382      article-treat-dumbquotes
4383      article-treat-non-ascii
4384      article-normalize-headers
4385      ;;(article-show-all . gnus-article-show-all-headers)
4386      )))
4387 \f
4388 ;;;
4389 ;;; Gnus article mode
4390 ;;;
4391
4392 (put 'gnus-article-mode 'mode-class 'special)
4393
4394 (set-keymap-parent gnus-article-mode-map widget-keymap)
4395
4396 (gnus-define-keys gnus-article-mode-map
4397   " " gnus-article-goto-next-page
4398   [?\S-\ ] gnus-article-goto-prev-page
4399   "\177" gnus-article-goto-prev-page
4400   [delete] gnus-article-goto-prev-page
4401   "\C-c^" gnus-article-refer-article
4402   "h" gnus-article-show-summary
4403   "s" gnus-article-show-summary
4404   "\C-c\C-m" gnus-article-mail
4405   "?" gnus-article-describe-briefly
4406   "<" beginning-of-buffer
4407   ">" end-of-buffer
4408   "\C-c\C-i" gnus-info-find-node
4409   "\C-c\C-b" gnus-bug
4410   "R" gnus-article-reply-with-original
4411   "F" gnus-article-followup-with-original
4412   "\C-hk" gnus-article-describe-key
4413   "\C-hc" gnus-article-describe-key-briefly
4414   "\C-hb" gnus-article-describe-bindings
4415
4416   "e" gnus-article-read-summary-keys
4417   "\C-d" gnus-article-read-summary-keys
4418   "\M-*" gnus-article-read-summary-keys
4419   "\M-#" gnus-article-read-summary-keys
4420   "\M-^" gnus-article-read-summary-keys
4421   "\M-g" gnus-article-read-summary-keys)
4422
4423 (substitute-key-definition
4424  'undefined 'gnus-article-read-summary-keys gnus-article-mode-map)
4425
4426 (gnus-define-keys (gnus-article-send-map "S" gnus-article-mode-map)
4427   "W" gnus-article-wide-reply-with-original)
4428 (if (featurep 'xemacs)
4429     (set-keymap-default-binding gnus-article-send-map
4430                                 'gnus-article-read-summary-send-keys)
4431   (define-key gnus-article-send-map [t] 'gnus-article-read-summary-send-keys))
4432
4433 (defun gnus-article-make-menu-bar ()
4434   (unless (boundp 'gnus-article-commands-menu)
4435     (gnus-summary-make-menu-bar))
4436   (unless (boundp 'gnus-article-article-menu)
4437     (easy-menu-define
4438      gnus-article-article-menu gnus-article-mode-map ""
4439      '("Article"
4440        ["Scroll forwards" gnus-article-goto-next-page t]
4441        ["Scroll backwards" gnus-article-goto-prev-page t]
4442        ["Show summary" gnus-article-show-summary t]
4443        ["Fetch Message-ID at point" gnus-article-refer-article t]
4444        ["Mail to address at point" gnus-article-mail t]
4445        ["Send a bug report" gnus-bug t]))
4446
4447     (easy-menu-define
4448      gnus-article-treatment-menu gnus-article-mode-map ""
4449      ;; Fixme: this should use :active (and maybe :visible).
4450      '("Treatment"
4451        ["Hide headers" gnus-article-hide-headers t]
4452        ["Hide signature" gnus-article-hide-signature t]
4453        ["Hide citation" gnus-article-hide-citation t]
4454        ["Treat overstrike" gnus-article-treat-overstrike t]
4455        ["Treat ANSI sequences" gnus-article-treat-ansi-sequences t]
4456        ["Remove carriage return" gnus-article-remove-cr t]
4457        ["Remove leading whitespace" gnus-article-remove-leading-whitespace t]
4458        ["Remove quoted-unreadable" gnus-article-de-quoted-unreadable t]
4459        ["Remove base64" gnus-article-de-base64-unreadable t]
4460        ["Treat html" gnus-article-wash-html t]
4461        ["Remove newlines from within URLs" gnus-article-unsplit-urls t]
4462        ["Decode HZ" gnus-article-decode-HZ t]))
4463
4464     ;; Note "Commands" menu is defined in gnus-sum.el for consistency
4465
4466     ;; Note "Post" menu is defined in gnus-sum.el for consistency
4467
4468     (gnus-run-hooks 'gnus-article-menu-hook)))
4469
4470 (defvar bookmark-make-record-function)
4471 (defvar shr-put-image-function)
4472
4473 (define-derived-mode gnus-article-mode fundamental-mode "Article"
4474   "Major mode for displaying an article.
4475
4476 All normal editing commands are switched off.
4477
4478 The following commands are available in addition to all summary mode
4479 commands:
4480 \\<gnus-article-mode-map>
4481 \\[gnus-article-next-page]\t Scroll the article one page forwards
4482 \\[gnus-article-prev-page]\t Scroll the article one page backwards
4483 \\[gnus-article-refer-article]\t Go to the article referred to by an article id near point
4484 \\[gnus-article-show-summary]\t Display the summary buffer
4485 \\[gnus-article-mail]\t Send a reply to the address near point
4486 \\[gnus-article-describe-briefly]\t Describe the current mode briefly
4487 \\[gnus-info-find-node]\t Go to the Gnus info node"
4488   (gnus-simplify-mode-line)
4489   (make-local-variable 'minor-mode-alist)
4490   (when (gnus-visual-p 'article-menu 'menu)
4491     (gnus-article-make-menu-bar)
4492     (when gnus-summary-tool-bar-map
4493       (set (make-local-variable 'tool-bar-map) gnus-summary-tool-bar-map)))
4494   (gnus-update-format-specifications nil 'article-mode)
4495   (set (make-local-variable 'page-delimiter) gnus-page-delimiter)
4496   (set (make-local-variable 'gnus-page-broken) nil)
4497   (make-local-variable 'gnus-article-current-summary)
4498   (make-local-variable 'gnus-article-mime-handles)
4499   (make-local-variable 'gnus-article-decoded-p)
4500   (make-local-variable 'gnus-article-mime-handle-alist)
4501   (make-local-variable 'gnus-article-wash-types)
4502   (make-local-variable 'gnus-article-image-alist)
4503   (make-local-variable 'gnus-article-charset)
4504   (make-local-variable 'gnus-article-ignored-charsets)
4505   (set (make-local-variable 'bookmark-make-record-function)
4506        'gnus-summary-bookmark-make-record)
4507   ;; Prevent Emacs 22 from displaying non-break space with `nobreak-space'
4508   ;; face.
4509   (set (make-local-variable 'nobreak-char-display) nil)
4510   ;; Enable `gnus-article-remove-images' to delete images shr.el renders.
4511   (set (make-local-variable 'shr-put-image-function) 'gnus-shr-put-image)
4512   (setq cursor-in-non-selected-windows nil)
4513   (gnus-set-default-directory)
4514   (buffer-disable-undo)
4515   (setq buffer-read-only t
4516         show-trailing-whitespace nil)
4517   (mm-enable-multibyte))
4518
4519 (defun gnus-article-setup-buffer ()
4520   "Initialize the article buffer."
4521   (let* ((name (if gnus-single-article-buffer "*Article*"
4522                  (concat "*Article "
4523                          (gnus-group-decoded-name gnus-newsgroup-name)
4524                          "*")))
4525          (original
4526           (progn (string-match "\\*Article" name)
4527                  (concat " *Original Article"
4528                          (substring name (match-end 0))))))
4529     (setq gnus-article-buffer name)
4530     (setq gnus-original-article-buffer original)
4531     (setq gnus-article-mime-handle-alist nil)
4532     (with-current-buffer gnus-summary-buffer
4533       ;; This might be a variable local to the summary buffer.
4534       (unless gnus-single-article-buffer
4535         (setq gnus-article-buffer name)
4536         (setq gnus-original-article-buffer original)
4537         (gnus-set-global-variables)))
4538     (gnus-article-setup-highlight-words)
4539     ;; Init original article buffer.
4540     (with-current-buffer (gnus-get-buffer-create gnus-original-article-buffer)
4541       (mm-enable-multibyte)
4542       (setq major-mode 'gnus-original-article-mode)
4543       (make-local-variable 'gnus-original-article))
4544     (if (and (get-buffer name)
4545              (with-current-buffer name
4546                (if gnus-article-edit-mode
4547                    (if (y-or-n-p "Article mode edit in progress; discard? ")
4548                        (progn
4549                          (set-buffer-modified-p nil)
4550                          (gnus-kill-buffer name)
4551                          (message "")
4552                          nil)
4553                      (error "Action aborted"))
4554                  t)))
4555         (let ((summary gnus-summary-buffer))
4556           (with-current-buffer name
4557             (set (make-local-variable 'gnus-article-edit-mode) nil)
4558             (gnus-article-stop-animations)
4559             (when gnus-article-mime-handles
4560               (mm-destroy-parts gnus-article-mime-handles)
4561               (setq gnus-article-mime-handles nil))
4562             ;; Set it to nil in article-buffer!
4563             (setq gnus-article-mime-handle-alist nil)
4564             (buffer-disable-undo)
4565             (setq buffer-read-only t)
4566             (unless (derived-mode-p 'gnus-article-mode)
4567               (gnus-article-mode))
4568             (set (make-local-variable 'gnus-summary-buffer) summary)
4569             (setq truncate-lines gnus-article-truncate-lines)
4570             (current-buffer)))
4571       (let ((summary gnus-summary-buffer))
4572         (with-current-buffer (gnus-get-buffer-create name)
4573           (gnus-article-mode)
4574           (setq truncate-lines gnus-article-truncate-lines)
4575           (set (make-local-variable 'gnus-summary-buffer) summary)
4576           (gnus-summary-set-local-parameters gnus-newsgroup-name)
4577           (when article-lapsed-timer
4578             (gnus-stop-date-timer))
4579           (when gnus-article-update-date-headers
4580             (gnus-start-date-timer gnus-article-update-date-headers))
4581           (current-buffer))))))
4582
4583 (defun gnus-article-stop-animations ()
4584   (dolist (timer (and (boundp 'timer-list)
4585                       timer-list))
4586     (when (eq (gnus-timer--function timer) 'image-animate-timeout)
4587       (cancel-timer timer))))
4588
4589 (defun gnus-stop-downloads ()
4590   (when (boundp 'url-queue)
4591     (set (intern "url-queue" obarray) nil)))
4592
4593 ;; Set article window start at LINE, where LINE is the number of lines
4594 ;; from the head of the article.
4595 (defun gnus-article-set-window-start (&optional line)
4596   (let ((article-window (gnus-get-buffer-window gnus-article-buffer t)))
4597     (when article-window
4598       (set-window-start
4599        article-window
4600        (with-current-buffer gnus-article-buffer
4601          (goto-char (point-min))
4602          (if (not line)
4603              (point-min)
4604            (gnus-message 6 "Moved to bookmark")
4605            (search-forward "\n\n" nil t)
4606            (forward-line line)
4607            (point)))))))
4608
4609 (defun gnus-article-prepare (article &optional all-headers header)
4610   "Prepare ARTICLE in article mode buffer.
4611 ARTICLE should either be an article number or a Message-ID.
4612 If ARTICLE is an id, HEADER should be the article headers.
4613 If ALL-HEADERS is non-nil, no headers are hidden."
4614   (save-excursion
4615     ;; Make sure we start in a summary buffer.
4616     (unless (derived-mode-p 'gnus-summary-mode)
4617       (set-buffer gnus-summary-buffer))
4618     (setq gnus-summary-buffer (current-buffer))
4619     (let* ((gnus-article (if header (mail-header-number header) article))
4620            (summary-buffer (current-buffer))
4621            (gnus-tmp-internal-hook gnus-article-internal-prepare-hook)
4622            (group gnus-newsgroup-name)
4623            result)
4624       (save-excursion
4625         (gnus-article-setup-buffer)
4626         (set-buffer gnus-article-buffer)
4627         ;; Deactivate active regions.
4628         (when (and (boundp 'transient-mark-mode)
4629                    transient-mark-mode)
4630           (setq mark-active nil))
4631         (if (not (setq result (let ((inhibit-read-only t))
4632                                 (gnus-request-article-this-buffer
4633                                  article group))))
4634             ;; There is no such article.
4635             (save-excursion
4636               (when (and (numberp article)
4637                          (not (memq article gnus-newsgroup-sparse)))
4638                 (setq gnus-article-current
4639                       (cons gnus-newsgroup-name article))
4640                 (set-buffer gnus-summary-buffer)
4641                 (setq gnus-current-article article)
4642                 (if (and (memq article gnus-newsgroup-undownloaded)
4643                          (not (gnus-online (gnus-find-method-for-group
4644                                             gnus-newsgroup-name))))
4645                     (progn
4646                       (gnus-summary-set-agent-mark article)
4647                       (message "Message marked for downloading"))
4648                   (gnus-summary-mark-article article gnus-canceled-mark)
4649                   (unless (memq article gnus-newsgroup-sparse)
4650                     (gnus-error 1 "No such article (may have expired or been canceled)")))))
4651           (if (or (eq result 'pseudo)
4652                   (eq result 'nneething))
4653               (progn
4654                 (with-current-buffer summary-buffer
4655                   (push article gnus-newsgroup-history)
4656                   (setq gnus-last-article gnus-current-article
4657                         gnus-current-article 0
4658                         gnus-current-headers nil
4659                         gnus-article-current nil)
4660                   (if (eq result 'nneething)
4661                       (gnus-configure-windows 'summary)
4662                     (gnus-configure-windows 'article))
4663                   (gnus-set-global-variables))
4664                 (let ((gnus-article-mime-handle-alist-1
4665                        gnus-article-mime-handle-alist))
4666                   (gnus-set-mode-line 'article)))
4667             ;; The result from the `request' was an actual article -
4668             ;; or at least some text that is now displayed in the
4669             ;; article buffer.
4670             (when (and (numberp article)
4671                        (not (eq article gnus-current-article)))
4672               ;; Seems like a new article has been selected.
4673               ;; `gnus-current-article' must be an article number.
4674               (with-current-buffer summary-buffer
4675                 (push article gnus-newsgroup-history)
4676                 (setq gnus-last-article gnus-current-article
4677                       gnus-current-article article
4678                       gnus-current-headers
4679                       (gnus-summary-article-header gnus-current-article)
4680                       gnus-article-current
4681                       (cons gnus-newsgroup-name gnus-current-article))
4682                 (unless (vectorp gnus-current-headers)
4683                   (setq gnus-current-headers nil))
4684                 (gnus-summary-goto-subject gnus-current-article)
4685                 (when (gnus-summary-show-thread)
4686                   ;; If the summary buffer really was folded, the
4687                   ;; previous goto may not actually have gone to
4688                   ;; the right article, but the thread root instead.
4689                   ;; So we go again.
4690                   (gnus-summary-goto-subject gnus-current-article))
4691                 (gnus-run-hooks 'gnus-mark-article-hook)
4692                 (gnus-set-mode-line 'summary)
4693                 (when (gnus-visual-p 'article-highlight 'highlight)
4694                   (gnus-run-hooks 'gnus-visual-mark-article-hook))
4695                 ;; Set the global newsgroup variables here.
4696                 (gnus-set-global-variables)
4697                 (setq gnus-have-all-headers
4698                       (or all-headers gnus-show-all-headers))))
4699             (save-excursion
4700               (gnus-configure-windows 'article))
4701             (when (or (numberp article)
4702                       (stringp article))
4703               (gnus-article-prepare-display)
4704               ;; Do page break.
4705               (goto-char (point-min))
4706               (when gnus-break-pages
4707                 (gnus-narrow-to-page)))
4708             (let ((gnus-article-mime-handle-alist-1
4709                    gnus-article-mime-handle-alist))
4710               (gnus-set-mode-line 'article))
4711             (article-goto-body)
4712             (unless (bobp)
4713               (forward-line -1))
4714             (set-window-point (get-buffer-window (current-buffer)) (point))
4715             (gnus-configure-windows 'article)
4716             (gnus-run-hooks 'gnus-article-prepare-hook)
4717             t))))))
4718
4719 ;;;###autoload
4720 (defun gnus-article-prepare-display ()
4721   "Make the current buffer look like a nice article."
4722   ;; Hooks for getting information from the article.
4723   ;; This hook must be called before being narrowed.
4724   (let ((gnus-article-buffer (current-buffer))
4725         buffer-read-only
4726         (inhibit-read-only t))
4727     (unless (derived-mode-p 'gnus-article-mode)
4728       (gnus-article-mode))
4729     (setq buffer-read-only nil
4730           gnus-article-wash-types nil
4731           gnus-article-image-alist nil)
4732     (gnus-run-hooks 'gnus-tmp-internal-hook)
4733     (when gnus-display-mime-function
4734       (funcall gnus-display-mime-function))
4735     ;; Add attachment buttons to the header.
4736     (when gnus-mime-display-attachment-buttons-in-header
4737       (gnus-mime-buttonize-attachments-in-header))))
4738
4739 ;;;
4740 ;;; Gnus Sticky Article Mode
4741 ;;;
4742
4743 (define-derived-mode gnus-sticky-article-mode gnus-article-mode "StickyArticle"
4744   "Mode for sticky articles."
4745   ;; Release bindings that won't work.
4746   (substitute-key-definition 'gnus-article-read-summary-keys 'undefined
4747                              gnus-sticky-article-mode-map)
4748   (substitute-key-definition 'gnus-article-refer-article 'undefined
4749                              gnus-sticky-article-mode-map)
4750   (dolist (k '("e" "h" "s" "F" "R"))
4751     (define-key gnus-sticky-article-mode-map k nil))
4752   (define-key gnus-sticky-article-mode-map "k" 'gnus-kill-sticky-article-buffer)
4753   (define-key gnus-sticky-article-mode-map "q" 'bury-buffer)
4754   (define-key gnus-sticky-article-mode-map "\C-hc" 'describe-key-briefly)
4755   (define-key gnus-sticky-article-mode-map "\C-hk" 'describe-key))
4756
4757 (defun gnus-sticky-article (arg)
4758   "Make the current article sticky.
4759 If a prefix ARG is given, ask for a name for this sticky article buffer."
4760   (interactive "P")
4761   (gnus-summary-show-thread)
4762   (gnus-summary-select-article nil nil 'pseudo)
4763   (let (new-art-buf-name)
4764     (gnus-eval-in-buffer-window gnus-article-buffer
4765       (setq new-art-buf-name
4766             (concat
4767              "*Sticky Article: "
4768              (if arg
4769                  (read-from-minibuffer "Sticky article buffer name: ")
4770                (gnus-with-article-headers
4771                  (gnus-article-goto-header "subject")
4772                  (setq new-art-buf-name
4773                        (buffer-substring-no-properties
4774                         (line-beginning-position) (line-end-position)))
4775                  (goto-char (point-min))
4776                  (gnus-article-goto-header "from")
4777                  (setq new-art-buf-name
4778                        (concat
4779                         new-art-buf-name ", "
4780                         (buffer-substring-no-properties
4781                          (line-beginning-position) (line-end-position))))
4782                  (goto-char (point-min))
4783                  (gnus-article-goto-header "date")
4784                  (setq new-art-buf-name
4785                        (concat
4786                         new-art-buf-name ", "
4787                         (buffer-substring-no-properties
4788                          (line-beginning-position) (line-end-position))))))
4789              "*"))
4790       (if (and (gnus-buffer-live-p new-art-buf-name)
4791                (with-current-buffer new-art-buf-name
4792                  (derived-mode-p 'gnus-sticky-article-mode)))
4793           (switch-to-buffer new-art-buf-name)
4794         (setq new-art-buf-name (rename-buffer new-art-buf-name t)))
4795       (gnus-sticky-article-mode))
4796     (setq gnus-article-buffer new-art-buf-name))
4797   (gnus-summary-recenter)
4798   (gnus-summary-position-point))
4799
4800 (defun gnus-kill-sticky-article-buffer (&optional buffer)
4801   "Kill the given sticky article BUFFER.
4802 If none is given, assume the current buffer and kill it if it has
4803 `gnus-sticky-article-mode'."
4804   (interactive)
4805   (unless buffer
4806     (setq buffer (current-buffer)))
4807   (with-current-buffer buffer
4808     (when (derived-mode-p 'gnus-sticky-article-mode)
4809       (gnus-kill-buffer buffer))))
4810
4811 (defun gnus-kill-sticky-article-buffers (arg)
4812   "Kill all sticky article buffers.
4813 If a prefix ARG is given, ask for confirmation."
4814   (interactive "P")
4815   (dolist (buf (gnus-buffers))
4816     (with-current-buffer buf
4817       (when (derived-mode-p 'gnus-sticky-article-mode)
4818         (if (not arg)
4819             (gnus-kill-buffer buf)
4820           (when (yes-or-no-p (concat "Kill buffer " (buffer-name buf) "? "))
4821             (gnus-kill-buffer buf)))))))
4822
4823 ;;;
4824 ;;; Gnus MIME viewing functions
4825 ;;;
4826
4827 (defvar gnus-mime-button-line-format "%{%([%p. %d%T]%)%}%e\n"
4828   "Format of the MIME buttons.
4829
4830 Valid specifiers include:
4831 %t  The MIME type
4832 %T  MIME type, along with additional info
4833 %n  The `name' parameter
4834 %d  The description, if any
4835 %l  The length of the encoded part
4836 %p  The part identifier number
4837 %e  Dots if the part isn't displayed
4838
4839 General format specifiers can also be used.  See Info node
4840 `(gnus)Formatting Variables'.")
4841
4842 (defvar gnus-mime-button-line-format-alist
4843   '((?t gnus-tmp-type ?s)
4844     (?T gnus-tmp-type-long ?s)
4845     (?n gnus-tmp-name ?s)
4846     (?d gnus-tmp-description ?s)
4847     (?p gnus-tmp-id ?s)
4848     (?l gnus-tmp-length ?d)
4849     (?e gnus-tmp-dots ?s)))
4850
4851 (defvar gnus-mime-button-commands
4852   '((gnus-article-press-button "\r" "Toggle Display")
4853     (gnus-mime-view-part "v" "View Interactively...")
4854     (gnus-mime-view-part-as-type "t" "View As Type...")
4855     (gnus-mime-view-part-as-charset "C" "View As charset...")
4856     (gnus-mime-save-part "o" "Save...")
4857     (gnus-mime-save-part-and-strip "\C-o" "Save and Strip")
4858     (gnus-mime-replace-part "r" "Replace part")
4859     (gnus-mime-delete-part "d" "Delete part")
4860     (gnus-mime-copy-part "c" "View As Text, In Other Buffer")
4861     (gnus-mime-inline-part "i" "View As Text, In This Buffer")
4862     (gnus-mime-view-part-internally "E" "View Internally") ;; Why `E'?
4863     (gnus-mime-view-part-externally "e" "View Externally")
4864     (gnus-mime-print-part "p" "Print")
4865     (gnus-mime-pipe-part "|" "Pipe To Command...")
4866     (gnus-mime-action-on-part "." "Take action on the part...")))
4867
4868 (defun gnus-article-mime-part-status ()
4869   (if gnus-article-mime-handle-alist-1
4870       (if (eq 1 (length gnus-article-mime-handle-alist-1))
4871           " (1 part)"
4872         (format " (%d parts)" (length gnus-article-mime-handle-alist-1)))
4873     ""))
4874
4875 (defvar gnus-mime-button-map
4876   (let ((map (make-sparse-keymap)))
4877     (define-key map gnus-mouse-2 'gnus-article-push-button)
4878     (define-key map gnus-down-mouse-3 'gnus-mime-button-menu)
4879     (dolist (c gnus-mime-button-commands)
4880       (define-key map (cadr c) (car c)))
4881     map))
4882
4883 (easy-menu-define
4884   gnus-mime-button-menu gnus-mime-button-map "MIME button menu."
4885   `("MIME Part"
4886     ,@(mapcar (lambda (c)
4887                 (vector (caddr c) (car c) :active t))
4888               gnus-mime-button-commands)))
4889
4890 (defvar gnus-url-button-commands
4891   '((gnus-article-copy-string "u" "Copy URL to kill ring")))
4892
4893 (defvar gnus-url-button-map
4894   (let ((map (make-sparse-keymap)))
4895     (dolist (c gnus-url-button-commands)
4896       (define-key map (cadr c) (car c)))
4897     map))
4898
4899 (easy-menu-define
4900   gnus-url-button-menu gnus-url-button-map "URL button menu."
4901   `("Url Button"
4902     ,@(mapcar (lambda (c)
4903                 (vector (caddr c) (car c) :active t))
4904               gnus-url-button-commands)))
4905
4906 (defmacro gnus-bind-safe-url-regexp (&rest body)
4907   "Bind `mm-w3m-safe-url-regexp' according to `gnus-safe-html-newsgroups'."
4908   `(let ((mm-w3m-safe-url-regexp
4909           (let ((group (if (and (derived-mode-p 'gnus-article-mode)
4910                                 (gnus-buffer-live-p
4911                                  gnus-article-current-summary))
4912                            (with-current-buffer gnus-article-current-summary
4913                              gnus-newsgroup-name)
4914                          gnus-newsgroup-name)))
4915             (if (cond ((not group)
4916                        ;; Maybe we're in a mml-preview buffer
4917                        ;; and no group is selected.
4918                        t)
4919                       ((stringp gnus-safe-html-newsgroups)
4920                        (string-match gnus-safe-html-newsgroups group))
4921                       ((consp gnus-safe-html-newsgroups)
4922                        (member group gnus-safe-html-newsgroups)))
4923                 nil
4924               mm-w3m-safe-url-regexp))))
4925      ,@body))
4926
4927 (defun gnus-mime-button-menu (event prefix)
4928  "Construct a context-sensitive menu of MIME commands."
4929  (interactive "e\nP")
4930  (save-window-excursion
4931    (let ((pos (event-start event)))
4932      (select-window (posn-window pos))
4933      (goto-char (posn-point pos))
4934      (gnus-article-check-buffer)
4935      (popup-menu gnus-mime-button-menu nil prefix))))
4936
4937 (defun gnus-mime-view-all-parts (&optional handles)
4938   "View all the MIME parts."
4939   (interactive)
4940   (with-current-buffer gnus-article-buffer
4941     (let ((handles (or handles gnus-article-mime-handles))
4942           (mail-parse-charset gnus-newsgroup-charset)
4943           (mail-parse-ignored-charsets
4944            (with-current-buffer gnus-summary-buffer
4945              gnus-newsgroup-ignored-charsets)))
4946       (when handles
4947         (mm-remove-parts handles)
4948         (goto-char (point-min))
4949         (or (search-forward "\n\n") (goto-char (point-max)))
4950         (let ((inhibit-read-only t))
4951           (delete-region (point) (point-max))
4952           (gnus-bind-safe-url-regexp (mm-display-parts handles)))))))
4953
4954 (defun gnus-article-jump-to-part (n)
4955   "Jump to MIME part N."
4956   (interactive "P")
4957   (let ((parts (with-current-buffer gnus-article-buffer
4958                  (length gnus-article-mime-handle-alist))))
4959     (when (zerop parts)
4960       (error "No such part"))
4961     (pop-to-buffer gnus-article-buffer)
4962     (or n
4963         (setq n (if (= parts 1)
4964                     1
4965                   (read-number (format "Jump to part (1..%s): " parts)))))
4966     (unless (and (integerp n) (<= n parts) (>= n 1))
4967       (setq n
4968             (progn
4969               (gnus-message 7 "Invalid part `%s', using %s instead."
4970                             n parts)
4971               parts)))
4972     (gnus-message 9 "Jumping to part %s." n)
4973     (cond ((>= gnus-auto-select-part 1)
4974            (while (and (<= n parts)
4975                        (not (gnus-article-goto-part n)))
4976              (setq n (1+ n))))
4977           ((< gnus-auto-select-part 0)
4978            (while (and (>= n 1)
4979                        (not (gnus-article-goto-part n)))
4980              (setq n (1- n))))
4981           (t
4982            (gnus-article-goto-part n)))))
4983
4984 (defvar gnus-mime-buttonized-part-id nil
4985   "ID of a mime part that should be buttonized.
4986 `gnus-mime-save-part-and-strip' and `gnus-mime-delete-part' bind it.")
4987
4988 (eval-when-compile
4989   (defsubst gnus-article-edit-part (handles &optional current-id)
4990     "Edit an article in order to delete a mime part.
4991 This function is exclusively used by `gnus-mime-save-part-and-strip'
4992 and `gnus-mime-delete-part', and not provided at run-time normally."
4993     (gnus-article-edit-article
4994      `(lambda ()
4995         (buffer-disable-undo)
4996         (let ((mail-parse-charset (or gnus-article-charset
4997                                       ',gnus-newsgroup-charset))
4998               (mail-parse-ignored-charsets
4999                (or gnus-article-ignored-charsets
5000                    ',gnus-newsgroup-ignored-charsets))
5001               (mbl mml-buffer-list))
5002           (setq mml-buffer-list nil)
5003           ;; A new text must be inserted before deleting existing ones
5004           ;; at the end so as not to move existing markers of which
5005           ;; the insertion type is t.
5006           (delete-region
5007            (point-min)
5008            (prog1
5009                (goto-char (point-max))
5010              (insert-buffer-substring gnus-original-article-buffer)))
5011           (mime-to-mml ',handles)
5012           (setq gnus-article-mime-handles nil)
5013           (let ((mbl1 mml-buffer-list))
5014             (setq mml-buffer-list mbl)
5015             (set (make-local-variable 'mml-buffer-list) mbl1))
5016           (gnus-make-local-hook 'kill-buffer-hook)
5017           (add-hook 'kill-buffer-hook 'mml-destroy-buffers t t)))
5018      `(lambda (no-highlight)
5019         (let ((mail-parse-charset (or gnus-article-charset
5020                                       ',gnus-newsgroup-charset))
5021               (message-options message-options)
5022               (message-options-set-recipient)
5023               (mail-parse-ignored-charsets
5024                (or gnus-article-ignored-charsets
5025                    ',gnus-newsgroup-ignored-charsets)))
5026           (mml-to-mime)
5027           (mml-destroy-buffers)
5028           (remove-hook 'kill-buffer-hook
5029                        'mml-destroy-buffers t)
5030           (kill-local-variable 'mml-buffer-list))
5031         (gnus-summary-edit-article-done
5032          ,(or (mail-header-references gnus-current-headers) "")
5033          ,(gnus-group-read-only-p)
5034          ,gnus-summary-buffer no-highlight))
5035      t)
5036     ;; Force buttonizing this part.
5037     (let ((gnus-mime-buttonized-part-id current-id))
5038       (gnus-article-edit-done))
5039     (gnus-configure-windows 'article)
5040     (when (and current-id (integerp gnus-auto-select-part))
5041       (gnus-article-jump-to-part
5042        (min (max (+ current-id gnus-auto-select-part) 1)
5043             (with-current-buffer gnus-article-buffer
5044               (length gnus-article-mime-handle-alist)))))))
5045
5046 (defun gnus-mime-replace-part (file)
5047   "Replace MIME part under point with an external body."
5048   ;; Useful if file has already been saved to disk
5049   (interactive
5050    (list
5051     (read-file-name "Replace MIME part with file: "
5052                     (or mm-default-directory default-directory)
5053                     nil nil)))
5054   (gnus-mime-save-part-and-strip file))
5055
5056 (defun gnus-mime-save-part-and-strip (&optional file)
5057   "Save the MIME part under point then replace it with an external body.
5058 If FILE is given, use it for the external part."
5059   (interactive)
5060   (gnus-article-check-buffer)
5061   (when (gnus-group-read-only-p)
5062     (error "The current group does not support deleting of parts"))
5063   (when (mm-complicated-handles gnus-article-mime-handles)
5064     (error "\
5065 The current article has a complicated MIME structure, giving up..."))
5066   (let* ((data (get-text-property (point) 'gnus-data))
5067          (id (get-text-property (point) 'gnus-part))
5068          param
5069          (handles gnus-article-mime-handles))
5070     (unless file
5071       (setq file
5072             (and data (mm-save-part data "Delete MIME part and save to: "))))
5073     (when file
5074       (with-current-buffer (mm-handle-buffer data)
5075         (erase-buffer)
5076         (insert "Content-Type: " (mm-handle-media-type data))
5077         (mml-insert-parameter-string (cdr (mm-handle-type data))
5078                                      '(charset))
5079         ;; Add a filename for the sake of saving the part again.
5080         (mml-insert-parameter
5081          (mail-header-encode-parameter "name" (file-name-nondirectory file)))
5082         (insert "\n")
5083         (insert "Content-ID: " (message-make-message-id) "\n")
5084         (insert "Content-Transfer-Encoding: binary\n")
5085         (insert "\n"))
5086       (setcdr data
5087               (cdr (mm-make-handle nil
5088                                    `("message/external-body"
5089                                      (access-type . "LOCAL-FILE")
5090                                      (name . ,file)))))
5091       ;; (set-buffer gnus-summary-buffer)
5092       (gnus-article-edit-part handles id))))
5093
5094 ;; A function like `gnus-summary-save-parts' (`X m', `<MIME> <Extract all
5095 ;; parts...>') but with stripping would be nice.
5096
5097 (defun gnus-mime-delete-part ()
5098   "Delete the MIME part under point.
5099 Replace it with some information about the removed part."
5100   (interactive)
5101   (gnus-article-check-buffer)
5102   (when (gnus-group-read-only-p)
5103     (error "The current group does not support deleting of parts"))
5104   (when (mm-complicated-handles gnus-article-mime-handles)
5105     (error "\
5106 The current article has a complicated MIME structure, giving up..."))
5107   (when (or gnus-expert-user
5108             (gnus-yes-or-no-p "\
5109 Deleting parts may malfunction or destroy the article; continue? "))
5110     (let* ((data (get-text-property (point) 'gnus-data))
5111            (id (get-text-property (point) 'gnus-part))
5112            (handles gnus-article-mime-handles)
5113            (description
5114             (let ((desc (mm-handle-description data)))
5115               (when desc
5116                 (mail-decode-encoded-word-string desc))))
5117            (filename (or (mm-handle-filename data) "(none)"))
5118            (type (mm-handle-media-type data)))
5119       (unless data
5120         (error "No MIME part under point"))
5121       (with-current-buffer (mm-handle-buffer data)
5122         (let ((bsize (buffer-size)))
5123           (erase-buffer)
5124           (insert
5125            (concat
5126             ",----\n"
5127             "| The following attachment has been deleted:\n"
5128             "|\n"
5129             "| Type:           " type "\n"
5130             "| Filename:       " filename "\n"
5131             "| Size (encoded): " (format "%s byte%s\n"
5132                                          bsize (if (= bsize 1)
5133                                                    ""
5134                                                  "s"))
5135             (when description
5136               (concat    "| Description:    " description "\n"))
5137             "`----\n"))
5138           (setcdr data
5139                   (cdr (mm-make-handle
5140                         nil `("text/plain" (charset . gnus-decoded)) nil nil
5141                         (list "attachment")
5142                         (format "Deleted attachment (%s bytes)" bsize))))))
5143       ;; (set-buffer gnus-summary-buffer)
5144       (gnus-article-edit-part handles id))))
5145
5146 (defun gnus-mime-save-part ()
5147   "Save the MIME part under point."
5148   (interactive)
5149   (gnus-article-check-buffer)
5150   (let ((data (get-text-property (point) 'gnus-data)))
5151     (when data
5152       (mm-save-part data))))
5153
5154 (defun gnus-mime-pipe-part (&optional cmd)
5155   "Pipe the MIME part under point to a process.
5156 Use CMD as the process."
5157   (interactive)
5158   (gnus-article-check-buffer)
5159   (let ((data (get-text-property (point) 'gnus-data)))
5160     (when data
5161       (mm-pipe-part data cmd))))
5162
5163 (defun gnus-mime-view-part ()
5164   "Interactively choose a viewing method for the MIME part under point."
5165   (interactive)
5166   (gnus-article-check-buffer)
5167   (let ((data (get-text-property (point) 'gnus-data)))
5168     (when data
5169       (setq gnus-article-mime-handles
5170             (mm-merge-handles
5171              gnus-article-mime-handles (setq data (copy-sequence data))))
5172       (mm-interactively-view-part data))))
5173
5174 (defun gnus-mime-view-part-as-type-internal ()
5175   (gnus-article-check-buffer)
5176   (let* ((handle (get-text-property (point) 'gnus-data))
5177          (name (or
5178                 ;; Content-Type: foo/bar; name=...
5179                 (mail-content-type-get (mm-handle-type handle) 'name)
5180                 ;; Content-Disposition: attachment; filename=...
5181                 (cdr (assq 'filename (cdr (mm-handle-disposition handle))))))
5182          (def-type (and name (mm-default-file-encoding name))))
5183     (or (and def-type (cons def-type 0))
5184         (and handle
5185              (equal (mm-handle-media-supertype handle) "text")
5186              '("text/plain" . 0))
5187         '("application/octet-stream" . 0))))
5188
5189 (defun gnus-mime-view-part-as-type (&optional mime-type pred)
5190   "Choose a MIME media type, and view the part as such.
5191 If non-nil, PRED is a predicate to use during completion to limit the
5192 available media-types."
5193   (interactive)
5194   (unless mime-type
5195     (setq mime-type
5196           (let ((default (gnus-mime-view-part-as-type-internal)))
5197             (gnus-completing-read
5198              "View as MIME type"
5199              (if pred
5200                  (gnus-remove-if-not pred (mailcap-mime-types))
5201                (mailcap-mime-types))
5202              nil nil nil
5203              (car default)))))
5204   (gnus-article-check-buffer)
5205   (let ((handle (get-text-property (point) 'gnus-data)))
5206     (when handle
5207       (when (equal (mm-handle-media-type handle) "message/external-body")
5208         (unless (mm-handle-cache handle)
5209           (mm-extern-cache-contents handle))
5210         (setq handle (mm-handle-cache handle)))
5211       (setq handle
5212             (mm-make-handle (mm-handle-buffer handle)
5213                             (cons mime-type (cdr (mm-handle-type handle)))
5214                             (mm-handle-encoding handle)
5215                             (mm-handle-undisplayer handle)
5216                             (mm-handle-disposition handle)
5217                             (mm-handle-description handle)
5218                             nil
5219                             (mm-handle-id handle)))
5220       (setq gnus-article-mime-handles
5221             (mm-merge-handles gnus-article-mime-handles handle))
5222       (when (mm-handle-displayed-p handle)
5223         (mm-remove-part handle))
5224       (gnus-mm-display-part handle))))
5225
5226 (defun gnus-mime-copy-part (&optional handle arg)
5227   "Put the MIME part under point into a new buffer.
5228 If `auto-compression-mode' is enabled, compressed files like .gz and .bz2
5229 are decompressed."
5230   (interactive (list nil current-prefix-arg))
5231   (gnus-article-check-buffer)
5232   (unless handle
5233     (setq handle (get-text-property (point) 'gnus-data)))
5234   (when handle
5235     (let ((filename (mm-handle-filename handle))
5236           contents dont-decode charset coding-system)
5237       (mm-with-unibyte-buffer
5238         (mm-insert-part handle)
5239         (setq contents (or (condition-case nil
5240                                (mm-decompress-buffer filename nil 'sig)
5241                              (error
5242                               (setq dont-decode t)
5243                               nil))
5244                            (buffer-string))))
5245       (setq filename (cond (filename (file-name-nondirectory filename))
5246                            (dont-decode "*raw data*")
5247                            (t "*decoded*")))
5248       (cond
5249        (dont-decode)
5250        ((not arg)
5251         (unless (setq charset (mail-content-type-get
5252                                (mm-handle-type handle) 'charset))
5253           (unless (setq coding-system (mm-with-unibyte-buffer
5254                                         (insert contents)
5255                                         (mm-find-buffer-file-coding-system)))
5256             (setq charset gnus-newsgroup-charset))))
5257        ((numberp arg)
5258         (setq charset (or (cdr (assq arg
5259                                      gnus-summary-show-article-charset-alist))
5260                           (mm-read-coding-system "Charset: ")))))
5261       (switch-to-buffer (generate-new-buffer filename))
5262       (if (or coding-system
5263               (and charset
5264                    (setq coding-system (mm-charset-to-coding-system
5265                                         charset nil t))
5266                    (not (eq coding-system 'ascii))))
5267           (progn
5268             (mm-enable-multibyte)
5269             (insert (mm-decode-coding-string contents coding-system))
5270             (setq buffer-file-coding-system
5271                   (if (boundp 'last-coding-system-used)
5272                       (symbol-value 'last-coding-system-used)
5273                     coding-system)))
5274         (mm-disable-multibyte)
5275         (insert contents)
5276         (setq buffer-file-coding-system mm-binary-coding-system))
5277       ;; We do it this way to make `normal-mode' set the appropriate mode.
5278       (unwind-protect
5279           (progn
5280             (setq buffer-file-name (expand-file-name filename))
5281             (normal-mode))
5282         (setq buffer-file-name nil))
5283       (goto-char (point-min)))))
5284
5285 (defun gnus-mime-print-part (&optional handle filename)
5286   "Print the MIME part under point."
5287   (interactive (list nil (ps-print-preprint current-prefix-arg)))
5288   (gnus-article-check-buffer)
5289   (let* ((handle (or handle (get-text-property (point) 'gnus-data)))
5290          (contents (and handle (mm-get-part handle)))
5291          (file (mm-make-temp-file (expand-file-name "mm." mm-tmp-directory)))
5292          (printer (mailcap-mime-info (mm-handle-media-type handle) "print")))
5293     (when contents
5294         (if printer
5295             (unwind-protect
5296                 (progn
5297                   (mm-save-part-to-file handle file)
5298                   (call-process shell-file-name nil
5299                                 (generate-new-buffer " *mm*")
5300                                 nil
5301                                 shell-command-switch
5302                                 (mm-mailcap-command
5303                                  printer file (mm-handle-type handle))))
5304               (delete-file file))
5305           (with-temp-buffer
5306             (insert contents)
5307             (gnus-print-buffer))
5308           (ps-despool filename)))))
5309
5310 (defun gnus-mime-inline-part (&optional handle arg)
5311   "Insert the MIME part under point into the current buffer.
5312 Compressed files like .gz and .bz2 are decompressed."
5313   (interactive (list nil current-prefix-arg))
5314   (gnus-article-check-buffer)
5315   (let* ((inhibit-read-only t)
5316          (b (point))
5317          (btn ;; position where the MIME button exists
5318           (if handle
5319               (if (eq handle (get-text-property b 'gnus-data))
5320                   b
5321                 (article-goto-body)
5322                 (or (text-property-any (point) (point-max) 'gnus-data handle)
5323                     (text-property-any (point-min) (point) 'gnus-data handle)))
5324             (setq handle (get-text-property b 'gnus-data))
5325             b))
5326          start contents charset coding-system)
5327     (when handle
5328       (when (= b (prog1
5329                      btn
5330                    (setq start (next-single-property-change btn 'gnus-data
5331                                                             nil (point-max))
5332                          btn (previous-single-property-change start
5333                                                               'gnus-data))))
5334         (setq b btn))
5335       (if (and (not arg) (mm-handle-undisplayer handle))
5336           (mm-remove-part handle)
5337         (mm-with-unibyte-buffer
5338           (mm-insert-part handle)
5339           (setq contents
5340                 (or (mm-decompress-buffer (mm-handle-filename handle) nil t)
5341                     (buffer-string))))
5342         (cond
5343          ((not arg)
5344           (unless (setq charset (mail-content-type-get
5345                                  (mm-handle-type handle) 'charset))
5346             (unless (setq coding-system
5347                           (mm-with-unibyte-buffer
5348                             (insert contents)
5349                             (mm-find-buffer-file-coding-system)))
5350               (setq charset gnus-newsgroup-charset))))
5351          ((numberp arg)
5352           (if (mm-handle-undisplayer handle)
5353               (mm-remove-part handle))
5354           (setq charset
5355                 (or (cdr (assq arg
5356                                gnus-summary-show-article-charset-alist))
5357                     (mm-read-coding-system "Charset: "))))
5358          ((mm-handle-undisplayer handle)
5359           (mm-remove-part handle)))
5360         (goto-char start)
5361         (unless (bolp)
5362           ;; This is a header button.
5363           (forward-line 1))
5364         (mm-display-inline handle))
5365       ;; Toggle the button appearance between `[button]...' and `[button]'.
5366       (goto-char btn)
5367       (let ((displayed-p (mm-handle-displayed-p handle)))
5368         (gnus-insert-mime-button handle (get-text-property btn 'gnus-part)
5369                                  (list displayed-p))
5370         (if (featurep 'emacs)
5371             (delete-region
5372              (point)
5373              (next-single-property-change (point) 'gnus-data nil (point-max)))
5374           (let* ((end (next-single-property-change (point) 'gnus-data))
5375                  (annots (annotations-at (or end (point-max)))))
5376             (delete-region (point)
5377                            (if end
5378                                (if annots (1+ end) end)
5379                              (point-max)))
5380             (dolist (annot annots)
5381               (set-extent-endpoints annot (point) (point)))))
5382         (setq start (point))
5383         (if (search-backward "\n\n" nil t)
5384             (progn
5385               (goto-char start)
5386               (unless (or displayed-p (eolp))
5387                 ;; Add extra newline.
5388                 (insert (propertize (buffer-substring (1- start) start)
5389                                     'gnus-undeletable t))))
5390           ;; We're in the article header.
5391           (delete-char -1)
5392           (dolist (ovl (gnus-overlays-in btn (point)))
5393             (gnus-overlay-put ovl 'gnus-button-attachment-extra t)
5394             (gnus-overlay-put ovl 'face nil))
5395           (save-restriction
5396             (message-narrow-to-field)
5397             (let ((gnus-treatment-function-alist
5398                    '((gnus-treat-highlight-headers
5399                       gnus-article-highlight-headers))))
5400               (gnus-treat-article 'head)))))
5401       (goto-char b))))
5402
5403 (defun gnus-mime-set-charset-parameters (handle charset)
5404   "Set CHARSET to parameters in HANDLE.
5405 CHARSET may either be a string or a symbol."
5406   (unless (stringp charset)
5407     (setq charset (symbol-name charset)))
5408   (if (stringp (car handle))
5409       (dolist (h (cdr handle))
5410         (gnus-mime-set-charset-parameters h charset))
5411     (let* ((type (mm-handle-type (if (equal (mm-handle-media-type handle)
5412                                             "message/external-body")
5413                                      (progn
5414                                        (unless (mm-handle-cache handle)
5415                                          (mm-extern-cache-contents handle))
5416                                        (mm-handle-cache handle))
5417                                    handle)))
5418            (param (assq 'charset (cdr type))))
5419       (if param
5420           (setcdr param charset)
5421         (setcdr type (cons (cons 'charset charset) (cdr type)))))))
5422
5423 (defun gnus-mime-view-part-as-charset (&optional handle arg)
5424   "Insert the MIME part under point into the current buffer using the
5425 specified charset."
5426   (interactive (list nil current-prefix-arg))
5427   (gnus-article-check-buffer)
5428   (let ((handle (or handle (get-text-property (point) 'gnus-data)))
5429         (fun (get-text-property (point) 'gnus-callback))
5430         (gnus-newsgroup-ignored-charsets 'gnus-all)
5431         charset form preferred parts)
5432     (when handle
5433       (when (prog1
5434                 (and fun
5435                      (setq charset
5436                            (or (cdr (assq
5437                                      arg
5438                                      gnus-summary-show-article-charset-alist))
5439                                (mm-read-coding-system "Charset: "))))
5440               (if (mm-handle-undisplayer handle)
5441                   (mm-remove-part handle)))
5442         (gnus-mime-set-charset-parameters handle charset)
5443         (when (and (consp (setq form (cdr-safe fun)))
5444                    (setq form (ignore-errors
5445                                 (assq 'gnus-mime-display-alternative form)))
5446                    (setq preferred (caddr form))
5447                    (progn
5448                      (when (eq (car preferred) 'quote)
5449                        (setq preferred (cadr preferred)))
5450                      (not (equal preferred
5451                                  (get-text-property (point) 'gnus-data))))
5452                    (setq parts (get-text-property (point) 'gnus-part))
5453                    (setq parts (cdr (assq parts
5454                                           gnus-article-mime-handle-alist)))
5455                    (equal (mm-handle-media-type parts) "multipart/alternative")
5456                    (setq parts (reverse (cdr parts))))
5457           (setcar (cddr form)
5458                   (list 'quote (or (cadr (member preferred parts))
5459                                    (car parts)))))
5460         (funcall fun handle)))))
5461
5462 (defun gnus-mime-view-part-externally (&optional handle)
5463   "View the MIME part under point with an external viewer."
5464   (interactive)
5465   (gnus-article-check-buffer)
5466   (let* ((handle (or handle (get-text-property (point) 'gnus-data)))
5467          (mm-user-display-methods nil)
5468          (mm-inlined-types nil)
5469          (mail-parse-charset gnus-newsgroup-charset)
5470          (mail-parse-ignored-charsets
5471           (with-current-buffer gnus-summary-buffer
5472             gnus-newsgroup-ignored-charsets))
5473          (type (mm-handle-media-type handle))
5474          (method (mailcap-mime-info type))
5475          (mm-enable-external t))
5476     (if (not (stringp method))
5477         (gnus-mime-view-part-as-type
5478          nil (lambda (type) (stringp (mailcap-mime-info type))))
5479       (when handle
5480         (mm-display-part handle nil t)))))
5481
5482 (defun gnus-mime-view-part-internally (&optional handle)
5483   "View the MIME part under point with an internal viewer.
5484 If no internal viewer is available, use an external viewer."
5485   (interactive)
5486   (gnus-article-check-buffer)
5487   (let* ((handle (or handle (get-text-property (point) 'gnus-data)))
5488          (mm-inlined-types '(".*"))
5489          (mm-inline-large-images t)
5490          (mail-parse-charset gnus-newsgroup-charset)
5491          (mail-parse-ignored-charsets
5492           (with-current-buffer gnus-summary-buffer
5493             gnus-newsgroup-ignored-charsets))
5494          (inhibit-read-only t))
5495     (if (not (mm-inlinable-p handle))
5496         (gnus-mime-view-part-as-type
5497          nil (lambda (type) (mm-inlinable-p handle type)))
5498       (when handle
5499         (gnus-bind-safe-url-regexp (mm-display-part handle))))))
5500
5501 (defun gnus-mime-action-on-part (&optional action)
5502   "Do something with the MIME attachment at \(point\)."
5503   (interactive
5504    (list (gnus-completing-read "Action" (mapcar 'car gnus-mime-action-alist) t)))
5505   (gnus-article-check-buffer)
5506   (let ((action-pair (assoc action gnus-mime-action-alist)))
5507     (if action-pair
5508         (funcall (cdr action-pair)))))
5509
5510 (defun gnus-article-part-wrapper (n function &optional no-handle interactive)
5511   "Call FUNCTION on MIME part N.
5512 Unless NO-HANDLE, call FUNCTION with N-th MIME handle as its only argument.
5513 If INTERACTIVE, call FUNCTION interactively."
5514   (let (window frame)
5515     ;; Check whether the article is displayed.
5516     (unless (and (gnus-buffer-live-p gnus-article-buffer)
5517                  (setq window (get-buffer-window gnus-article-buffer t))
5518                  (frame-visible-p (setq frame (window-frame window))))
5519       (error "No article is displayed"))
5520     (with-current-buffer gnus-article-buffer
5521       ;; Check whether the article displays the right contents.
5522       (unless (with-current-buffer gnus-summary-buffer
5523                 (eq gnus-current-article (gnus-summary-article-number)))
5524         (error "You should select the right article first"))
5525       (if n
5526           (setq n (prefix-numeric-value n))
5527         (let ((pt (point)))
5528           (setq n (or (get-text-property pt 'gnus-part)
5529                       (and (not (bobp))
5530                            (get-text-property (1- pt) 'gnus-part))
5531                       (get-text-property (prog2
5532                                              (forward-line 1)
5533                                              (point)
5534                                            (goto-char pt))
5535                                          'gnus-part)
5536                       (get-text-property
5537                        (or (and (setq pt (previous-single-property-change
5538                                           pt 'gnus-part))
5539                                 (1- pt))
5540                            (next-single-property-change (point) 'gnus-part)
5541                            (point))
5542                        'gnus-part)
5543                       1))))
5544       ;; Check whether the specified part exists.
5545       (when (> n (length gnus-article-mime-handle-alist))
5546         (error "No such part")))
5547     (unless
5548         (progn
5549           ;; To select the window is needed so that the cursor
5550           ;; might be visible on the MIME button.
5551           (select-window (prog1
5552                              window
5553                            (setq window (selected-window))
5554                            ;; Article may be displayed in the other frame.
5555                            (gnus-select-frame-set-input-focus
5556                             (prog1
5557                                 frame
5558                               (setq frame (selected-frame))))))
5559           (when (gnus-article-goto-part n)
5560             ;; We point the cursor and the arrow at the MIME button
5561             ;; when the `function' prompt the user for something.
5562             (unless (and (pos-visible-in-window-p)
5563                          (> (count-lines (point) (window-end))
5564                             (/ (1- (window-height)) 3)))
5565               (recenter (/ (1- (window-height)) 3)))
5566             (let ((cursor-in-non-selected-windows t)
5567                   (overlay-arrow-string "=>")
5568                   (overlay-arrow-position (point-marker)))
5569               (unwind-protect
5570                   (cond
5571                    ((and no-handle interactive)
5572                     (call-interactively function))
5573                    (no-handle
5574                     (funcall function))
5575                    (interactive
5576                     (call-interactively
5577                      function (get-text-property (point) 'gnus-data)))
5578                    (t
5579                     (funcall function
5580                              (get-text-property (point) 'gnus-data))))
5581                 (set-marker overlay-arrow-position nil)
5582                 (unless gnus-auto-select-part
5583                   (gnus-select-frame-set-input-focus frame)
5584                   (select-window window))))
5585             t))
5586       (if gnus-inhibit-mime-unbuttonizing
5587           ;; This is the default though the program shouldn't reach here.
5588           (error "No such part")
5589         ;; The part which doesn't have the MIME button is selected.
5590         ;; So, we display all the buttons and redo it.
5591         (let ((gnus-inhibit-mime-unbuttonizing t))
5592           (gnus-summary-show-article)
5593           (gnus-article-part-wrapper n function no-handle))))))
5594
5595 (defun gnus-article-pipe-part (n)
5596   "Pipe MIME part N, which is the numerical prefix."
5597   (interactive "P")
5598   (gnus-article-part-wrapper n 'mm-pipe-part))
5599
5600 (defun gnus-article-save-part (n)
5601   "Save MIME part N, which is the numerical prefix."
5602   (interactive "P")
5603   (gnus-article-part-wrapper n 'mm-save-part))
5604
5605 (defun gnus-article-interactively-view-part (n)
5606   "View MIME part N interactively, which is the numerical prefix."
5607   (interactive "P")
5608   (gnus-article-part-wrapper n 'mm-interactively-view-part))
5609
5610 (defun gnus-article-copy-part (n)
5611   "Copy MIME part N, which is the numerical prefix."
5612   (interactive "P")
5613   (gnus-article-part-wrapper n 'gnus-mime-copy-part))
5614
5615 (defun gnus-article-view-part-as-charset (n)
5616   "View MIME part N using a specified charset.
5617 N is the numerical prefix."
5618   (interactive "P")
5619   (gnus-article-part-wrapper n 'gnus-mime-view-part-as-charset))
5620
5621 (defun gnus-article-view-part-externally (n)
5622   "View MIME part N externally, which is the numerical prefix."
5623   (interactive "P")
5624   (gnus-article-part-wrapper n 'gnus-mime-view-part-externally))
5625
5626 (defun gnus-article-inline-part (n)
5627   "Inline MIME part N, which is the numerical prefix."
5628   (interactive "P")
5629   (gnus-article-part-wrapper n 'gnus-mime-inline-part))
5630
5631 (defun gnus-article-save-part-and-strip (n)
5632   "Save MIME part N and replace it with an external body.
5633 N is the numerical prefix."
5634   (interactive "P")
5635   (gnus-article-part-wrapper n 'gnus-mime-save-part-and-strip t))
5636
5637 (defun gnus-article-replace-part (n)
5638   "Replace MIME part N with an external body.
5639 N is the numerical prefix."
5640   (interactive "P")
5641   (gnus-article-part-wrapper n 'gnus-mime-replace-part t t))
5642
5643 (defun gnus-article-delete-part (n)
5644   "Delete MIME part N and add some information about the removed part.
5645 N is the numerical prefix."
5646   (interactive "P")
5647   (gnus-article-part-wrapper n 'gnus-mime-delete-part t))
5648
5649 (defun gnus-article-view-part-as-type (n)
5650   "Choose a MIME media type, and view part N as such.
5651 N is the numerical prefix."
5652   (interactive "P")
5653   (gnus-article-part-wrapper n 'gnus-mime-view-part-as-type t))
5654
5655 (defun gnus-article-mime-match-handle-first (condition)
5656   (if condition
5657       (let (n)
5658         (dolist (ihandle gnus-article-mime-handle-alist)
5659           (if (and (cond
5660                     ((functionp condition)
5661                      (funcall condition (cdr ihandle)))
5662                     ((eq condition 'undisplayed)
5663                      (not (or (mm-handle-undisplayer (cdr ihandle))
5664                               (equal (mm-handle-media-type (cdr ihandle))
5665                                      "multipart/alternative"))))
5666                     ((eq condition 'undisplayed-alternative)
5667                      (not (mm-handle-undisplayer (cdr ihandle))))
5668                     (t t))
5669                    (gnus-article-goto-part (car ihandle))
5670                    (or (not n) (< (car ihandle) n)))
5671               (setq n (car ihandle))))
5672         (or n 1))
5673     1))
5674
5675 (defun gnus-article-view-part (&optional n)
5676   "View MIME part N, which is the numerical prefix.
5677 If the part is already shown, hide the part.  If N is nil, view
5678 all parts."
5679   (interactive "P")
5680   (with-current-buffer gnus-article-buffer
5681     (or (numberp n) (setq n (gnus-article-mime-match-handle-first
5682                              gnus-article-mime-match-handle-function)))
5683     (when (> n (length gnus-article-mime-handle-alist))
5684       (error "No such part"))
5685     (let ((handle (cdr (assq n gnus-article-mime-handle-alist))))
5686       (when (gnus-article-goto-part n)
5687         (if (equal (car handle) "multipart/alternative")
5688             (progn
5689               (beginning-of-line) ;; Make it toggle subparts
5690               (gnus-article-press-button))
5691           (when (eq (gnus-mm-display-part handle) 'internal)
5692             (gnus-set-window-start)))))))
5693
5694 (defsubst gnus-article-mime-total-parts ()
5695   (if (bufferp (car gnus-article-mime-handles))
5696       1 ;; single part
5697     (1- (length gnus-article-mime-handles))))
5698
5699 (defun gnus-mm-display-part (handle)
5700   "Display HANDLE and fix MIME button."
5701   (let ((id (get-text-property (point) 'gnus-part))
5702         (point (point))
5703         (inhibit-read-only t)
5704         (window (selected-window))
5705         (mail-parse-charset gnus-newsgroup-charset)
5706         (mail-parse-ignored-charsets
5707          (if (gnus-buffer-live-p gnus-summary-buffer)
5708              (with-current-buffer gnus-summary-buffer
5709                gnus-newsgroup-ignored-charsets)
5710            nil))
5711         start retval)
5712     (unwind-protect
5713         (progn
5714           (let ((win (gnus-get-buffer-window (current-buffer) t)))
5715             (when win
5716               (select-window win)
5717               (goto-char point)))
5718           (setq start (next-single-property-change point 'gnus-data
5719                                                    nil (point-max))
5720                 point (previous-single-property-change start 'gnus-data))
5721           (if (mm-handle-displayed-p handle)
5722               ;; This will remove the part.
5723               (setq retval (mm-display-part handle))
5724             (let ((part (or (and (mm-inlinable-p handle)
5725                                  (mm-inlined-p handle)
5726                                  t)
5727                             (with-temp-buffer
5728                               (gnus-bind-safe-url-regexp
5729                                (setq retval (mm-display-part handle)))
5730                               (unless (zerop (buffer-size))
5731                                 (buffer-string))))))
5732               (goto-char start)
5733               (unless (bolp)
5734                 ;; This is a header button.
5735                 (forward-line 1))
5736               (cond ((stringp part)
5737                      (save-restriction
5738                        (narrow-to-region (point)
5739                                          (progn
5740                                            (insert part)
5741                                            (unless (bolp) (insert "\n"))
5742                                            (point)))
5743                        (gnus-treat-article nil id
5744                                            (gnus-article-mime-total-parts)
5745                                            (mm-handle-media-type handle))
5746                        (mm-handle-set-undisplayer
5747                         handle
5748                         `(lambda ()
5749                            (let ((inhibit-read-only t))
5750                              (delete-region ,(copy-marker (point-min) t)
5751                                             ,(point-max-marker)))))))
5752                     (part
5753                      (mm-display-inline handle))))))
5754       (goto-char point)
5755       ;; Toggle the button appearance between `[button]...' and `[button]'.
5756       (let ((displayed-p (mm-handle-displayed-p handle)))
5757         (gnus-insert-mime-button handle id (list displayed-p))
5758         (if (featurep 'emacs)
5759             (delete-region
5760              (point)
5761              (next-single-property-change (point) 'gnus-data nil (point-max)))
5762           (let* ((end (next-single-property-change (point) 'gnus-data))
5763                  (annots (annotations-at (or end (point-max)))))
5764             (delete-region (point)
5765                            (if end
5766                                (if annots (1+ end) end)
5767                              (point-max)))
5768             (dolist (annot annots)
5769               (set-extent-endpoints annot (point) (point)))))
5770         (setq start (point))
5771         (if (search-backward "\n\n" nil t)
5772             (progn
5773               (goto-char start)
5774               (unless (or displayed-p (eolp))
5775                 ;; Add extra newline.
5776                 (insert (propertize (buffer-substring (1- start) start)
5777                                     'gnus-undeletable t))))
5778           ;; We're in the article header.
5779           (delete-char -1)
5780           (dolist (ovl (gnus-overlays-in point (point)))
5781             (gnus-overlay-put ovl 'gnus-button-attachment-extra t)
5782             (gnus-overlay-put ovl 'face nil))
5783           (save-restriction
5784             (message-narrow-to-field)
5785             (let ((gnus-treatment-function-alist
5786                    '((gnus-treat-highlight-headers
5787                       gnus-article-highlight-headers))))
5788               (gnus-treat-article 'head)))))
5789       (goto-char point)
5790       (if (window-live-p window)
5791           (select-window window)))
5792     retval))
5793
5794 (defun gnus-article-goto-part (n)
5795   "Go to MIME part N."
5796   (when gnus-break-pages
5797     (widen))
5798   (article-goto-body)
5799   (prog1
5800       (let ((start (or (text-property-any (point) (point-max) 'gnus-part n)
5801                        ;; There may be header buttons.
5802                        (text-property-any (point-min) (point) 'gnus-part n)))
5803             part handle end next handles)
5804         (when start
5805           (goto-char start)
5806           (if (setq handle (get-text-property start 'gnus-data))
5807               start
5808             ;; Go to the displayed subpart, assuming this is
5809             ;; multipart/alternative.
5810             (setq part start
5811                   end (point-at-eol))
5812             (while (and (not handle)
5813                         part
5814                         (< part end)
5815                         (setq next (text-property-not-all part end
5816                                                           'gnus-data nil)))
5817               (setq part next
5818                     handle (get-text-property part 'gnus-data))
5819               (push (cons handle part) handles)
5820               (unless (mm-handle-displayed-p handle)
5821                 (setq handle nil
5822                       part (text-property-any part end 'gnus-data nil))))
5823             (unless handle
5824               ;; No subpart is displayed, so we find preferred one.
5825               (setq part
5826                     (cdr (assq (mm-preferred-alternative
5827                                 (nreverse (mapcar 'car handles)))
5828                                handles))))
5829             (if part
5830                 (goto-char (1+ part))
5831               start))))
5832     (when gnus-break-pages
5833       (gnus-narrow-to-page))))
5834
5835 (defun gnus-insert-mime-button (handle gnus-tmp-id &optional displayed)
5836   (let ((gnus-tmp-name
5837          (or (mm-handle-filename handle)
5838              (mail-content-type-get (mm-handle-type handle) 'url)
5839              ""))
5840         (gnus-tmp-type (mm-handle-media-type handle))
5841         (gnus-tmp-description (or (mm-handle-description handle) ""))
5842         (gnus-tmp-dots
5843          (if (if displayed (car displayed)
5844                (mm-handle-displayed-p handle))
5845              "" "..."))
5846         (gnus-tmp-length (with-current-buffer (mm-handle-buffer handle)
5847                            (buffer-size)))
5848         gnus-tmp-type-long b e)
5849     (when (string-match ".*/" gnus-tmp-name)
5850       (setq gnus-tmp-name (replace-match "" t t gnus-tmp-name)))
5851     (setq gnus-tmp-type-long (concat gnus-tmp-type
5852                                      (and (not (equal gnus-tmp-name ""))
5853                                           (concat "; " gnus-tmp-name))))
5854     (unless (equal gnus-tmp-description "")
5855       (setq gnus-tmp-type-long (concat " --- " gnus-tmp-type-long)))
5856     (setq b (point))
5857     (gnus-eval-format
5858      gnus-mime-button-line-format gnus-mime-button-line-format-alist
5859      `(keymap ,gnus-mime-button-map
5860               gnus-callback gnus-mm-display-part
5861               gnus-part ,gnus-tmp-id
5862               article-type annotation
5863               gnus-data ,handle
5864               rear-nonsticky t))
5865     (setq e (if (bolp)
5866                 ;; Exclude a newline.
5867                 (1- (point))
5868               (point)))
5869     (when gnus-article-button-face
5870       (gnus-overlay-put (gnus-make-overlay b e nil t)
5871                         'face gnus-article-button-face))
5872     (widget-convert-button
5873      'link b e
5874      :mime-handle handle
5875      :action 'gnus-widget-press-button
5876      :button-keymap gnus-mime-button-map
5877      :help-echo
5878      (lambda (widget)
5879        ;; Needed to properly clear the message due to a bug in
5880        ;; wid-edit (XEmacs only).
5881        (if (boundp 'help-echo-owns-message)
5882            (setq help-echo-owns-message t))
5883        (format
5884         "%S: %s the MIME part; %S: more options"
5885         (aref gnus-mouse-2 0)
5886         (if (mm-handle-displayed-p (widget-get widget :mime-handle))
5887             "hide" "show")
5888         (aref gnus-down-mouse-3 0))))))
5889
5890 (defun gnus-widget-press-button (elems el)
5891   (goto-char (widget-get elems :from))
5892   (gnus-article-press-button))
5893
5894 (defvar gnus-displaying-mime nil)
5895
5896 (defun gnus-display-mime (&optional ihandles)
5897   "Display the MIME parts."
5898   (save-excursion
5899     (save-selected-window
5900       (let ((window (get-buffer-window gnus-article-buffer))
5901             (point (point)))
5902         (when window
5903           (select-window window)
5904           ;; We have to do this since selecting the window
5905           ;; may change the point.  So we set the window point.
5906           (set-window-point window point)))
5907       (let ((handles ihandles)
5908             (inhibit-read-only t)
5909             handle)
5910         (cond (handles)
5911               ((setq handles (mm-dissect-buffer nil gnus-article-loose-mime))
5912                (when gnus-article-emulate-mime
5913                  (mm-uu-dissect-text-parts handles)))
5914               (gnus-article-emulate-mime
5915                (setq handles (mm-uu-dissect))))
5916         (when (and (not ihandles)
5917                    (not gnus-displaying-mime))
5918           ;; Top-level call; we clean up.
5919           (when gnus-article-mime-handles
5920             (mm-destroy-parts gnus-article-mime-handles)
5921             (setq gnus-article-mime-handle-alist nil));; A trick.
5922           (setq gnus-article-mime-handles handles)
5923           ;; We allow users to glean info from the handles.
5924           (when gnus-article-mime-part-function
5925             (gnus-mime-part-function handles)))
5926         (if (and handles
5927                  (or (not (stringp (car handles)))
5928                      (cdr handles)))
5929             (progn
5930               (when (and (not ihandles)
5931                          (not gnus-displaying-mime))
5932                 ;; Clean up for mime parts.
5933                 (article-goto-body)
5934                 (delete-region (point) (point-max)))
5935               (let ((gnus-displaying-mime t))
5936                 (gnus-mime-display-part handles)))
5937           (save-restriction
5938             (article-goto-body)
5939             (narrow-to-region (point) (point-max))
5940             (gnus-treat-article nil 1 1 "text/plain")
5941             (widen)))
5942         (unless ihandles
5943           ;; Highlight the headers.
5944           (save-excursion
5945             (save-restriction
5946               (article-goto-body)
5947               (narrow-to-region (point-min) (point))
5948               (gnus-article-save-original-date
5949                (gnus-treat-article 'head)))))))
5950     ;; Cope with broken MIME messages.
5951     (goto-char (point-max))
5952     (unless (bolp)
5953       (insert "\n"))))
5954
5955 (defcustom gnus-mime-display-multipart-as-mixed nil
5956   "Display \"multipart\" parts as  \"multipart/mixed\".
5957
5958 If t, it overrides nil values of
5959 `gnus-mime-display-multipart-alternative-as-mixed' and
5960 `gnus-mime-display-multipart-related-as-mixed'."
5961   :group 'gnus-article-mime
5962   :type 'boolean)
5963
5964 (defcustom gnus-mime-display-multipart-alternative-as-mixed nil
5965   "Display \"multipart/alternative\" parts as  \"multipart/mixed\"."
5966   :version "22.1"
5967   :group 'gnus-article-mime
5968   :type 'boolean)
5969
5970 (defcustom gnus-mime-display-multipart-related-as-mixed nil
5971   "Display \"multipart/related\" parts as  \"multipart/mixed\".
5972
5973 If displaying \"text/html\" is discouraged \(see
5974 `mm-discouraged-alternatives'\) images or other material inside a
5975 \"multipart/related\" part might be overlooked when this variable is nil."
5976   :version "22.1"
5977   :group 'gnus-article-mime
5978   :type 'boolean)
5979
5980 (defcustom gnus-mime-display-attachment-buttons-in-header t
5981   "Add attachment buttons in the end of the header of an article.
5982 Since MIME attachments tend to be put at the end of an article, we may
5983 overlook them if there is a huge body.  This option offers you a copy
5984 of all non-inlinable MIME parts as buttons shown in front of an article.
5985 If nil, don't show those extra buttons."
5986   :version "25.1"
5987   :group 'gnus-article-mime
5988   :type 'boolean)
5989
5990 (defun gnus-mime-display-part (handle)
5991   (cond
5992    ;; Maybe a broken MIME message.
5993    ((null handle))
5994    ;; Single part.
5995    ((not (stringp (car handle)))
5996     (gnus-mime-display-single handle))
5997    ;; User-defined multipart
5998    ((cdr (assoc (car handle) gnus-mime-multipart-functions))
5999     (funcall (cdr (assoc (car handle) gnus-mime-multipart-functions))
6000              handle))
6001    ;; multipart/alternative
6002    ((and (equal (car handle) "multipart/alternative")
6003          (not (or gnus-mime-display-multipart-as-mixed
6004                   gnus-mime-display-multipart-alternative-as-mixed)))
6005     (let ((id (1+ (length gnus-article-mime-handle-alist))))
6006       (push (cons id handle) gnus-article-mime-handle-alist)
6007       (gnus-mime-display-alternative (cdr handle) nil nil id)))
6008    ;; multipart/related
6009    ((and (equal (car handle) "multipart/related")
6010          (not (or gnus-mime-display-multipart-as-mixed
6011                   gnus-mime-display-multipart-related-as-mixed)))
6012     (gnus-mime-display-part (cadr handle)))
6013    ((equal (car handle) "multipart/signed")
6014     (gnus-add-wash-type 'signed)
6015     (gnus-mime-display-security handle))
6016    ((equal (car handle) "multipart/encrypted")
6017     (gnus-add-wash-type 'encrypted)
6018     (gnus-mime-display-security handle))
6019    ;; Other multiparts are handled like multipart/mixed.
6020    (t
6021     (gnus-mime-display-mixed (cdr handle)))))
6022
6023 (defun gnus-mime-part-function (handles)
6024   (if (stringp (car handles))
6025       (mapcar 'gnus-mime-part-function (cdr handles))
6026     (funcall gnus-article-mime-part-function handles)))
6027
6028 (defun gnus-mime-display-mixed (handles)
6029   (mapcar 'gnus-mime-display-part handles))
6030
6031 (defun gnus-mime-display-single (handle)
6032   (let ((type (mm-handle-media-type handle))
6033         (ignored gnus-ignored-mime-types)
6034         (not-attachment t)
6035         display text)
6036     (catch 'ignored
6037       (progn
6038         (while ignored
6039           (when (string-match (pop ignored) type)
6040             (throw 'ignored nil)))
6041         (if (and (not (and (if (gnus-buffer-live-p gnus-summary-buffer)
6042                                (with-current-buffer gnus-summary-buffer
6043                                  gnus-inhibit-images)
6044                              gnus-inhibit-images)
6045                            (string-match "\\`image/" type)))
6046                  (setq not-attachment
6047                        (and (not (mm-inline-override-p handle))
6048                             (or (not (mm-handle-disposition handle))
6049                                 (equal (car (mm-handle-disposition handle))
6050                                        "inline")
6051                                 (mm-attachment-override-p handle))))
6052                  (mm-automatic-display-p handle)
6053                  (or (and
6054                       (mm-inlinable-p handle)
6055                       (mm-inlined-p handle))
6056                      (mm-automatic-external-display-p type)))
6057             (setq display t)
6058           (when (equal (mm-handle-media-supertype handle) "text")
6059             (setq text t)))
6060         (let ((id (car (rassq handle gnus-article-mime-handle-alist)))
6061               beg)
6062           (unless id
6063             (setq id (1+ (length gnus-article-mime-handle-alist)))
6064             (push (cons id handle) gnus-article-mime-handle-alist))
6065           (when (and display
6066                      (equal (mm-handle-media-supertype handle) "message"))
6067             (insert-char
6068              ?\n
6069              (cond ((not (bolp)) 2)
6070                    ((or (bobp) (eq (char-before (1- (point))) ?\n)) 0)
6071                    (t 1))))
6072           (when (or (not display)
6073                     (not (gnus-unbuttonized-mime-type-p type))
6074                     (eq id gnus-mime-buttonized-part-id))
6075             (gnus-insert-mime-button
6076              handle id (list (or display (and not-attachment text)))))
6077           (setq beg (point))
6078           (cond
6079            (display
6080             (let ((mail-parse-charset gnus-newsgroup-charset)
6081                   (mail-parse-ignored-charsets
6082                    (save-excursion (condition-case ()
6083                                        (set-buffer gnus-summary-buffer)
6084                                      (error))
6085                                    gnus-newsgroup-ignored-charsets)))
6086               (gnus-bind-safe-url-regexp (mm-display-part handle t))))
6087            ((and text not-attachment)
6088             (mm-display-inline handle)))
6089           (goto-char (point-max))
6090           (if (string-match "\\`image/" type)
6091               (gnus-article-insert-newline)
6092             (if (prog1
6093                     (= (skip-chars-backward "\n") -1)
6094                   (forward-char 1))
6095                 (gnus-article-insert-newline)
6096               (put-text-property (point) (point-max) 'gnus-undeletable t))
6097             (goto-char (point-max)))
6098           ;; Do highlighting.
6099           (save-excursion
6100             (save-restriction
6101               (narrow-to-region beg (point))
6102               (if (eq handle gnus-article-mime-handles)
6103                   ;; The format=flowed case.
6104                   (gnus-treat-article nil 1 1 (mm-handle-media-type handle))
6105                 ;; Don't count signature parts that are never displayed.
6106                 ;; The part number should be re-calculated supposing this
6107                 ;; might be a message/rfc822 part.
6108                 (let (handles)
6109                   (dolist (part gnus-article-mime-handles)
6110                     (unless (or (stringp part)
6111                                 (equal (car (mm-handle-type part))
6112                                        "application/pgp-signature"))
6113                       (push part handles)))
6114                   (gnus-treat-article
6115                    nil (length (memq handle handles)) (length handles)
6116                    (mm-handle-media-type handle)))))))))))
6117
6118 (defun gnus-unbuttonized-mime-type-p (type)
6119   "Say whether TYPE is to be unbuttonized."
6120   (unless gnus-inhibit-mime-unbuttonizing
6121     (when (catch 'found
6122             (let ((types gnus-unbuttonized-mime-types))
6123               (while types
6124                 (when (string-match (pop types) type)
6125                   (throw 'found t)))))
6126       (not (catch 'found
6127              (let ((types gnus-buttonized-mime-types))
6128                (while types
6129                  (when (string-match (pop types) type)
6130                    (throw 'found t)))))))))
6131
6132 (defun gnus-article-insert-newline ()
6133   "Insert a newline, but mark it as undeletable."
6134   (gnus-put-text-property
6135    (point) (progn (insert "\n") (point)) 'gnus-undeletable t))
6136
6137 (defun gnus-mime-display-alternative (handles &optional preferred ibegend id)
6138   (let* ((preferred (or preferred (mm-preferred-alternative handles)))
6139          (ihandles handles)
6140          (point (point))
6141          handle (inhibit-read-only t) from props begend not-pref)
6142     (save-window-excursion
6143       (save-restriction
6144         (when ibegend
6145           (narrow-to-region (car ibegend)
6146                             (or (cdr ibegend)
6147                                 (progn
6148                                   (goto-char (car ibegend))
6149                                   (forward-line 2)
6150                                   (point))))
6151           (delete-region (point-min) (point-max))
6152           (mm-remove-parts handles))
6153         (setq begend (list (point-marker)))
6154         ;; Do the toggle.
6155         (unless (setq not-pref (cadr (member preferred ihandles)))
6156           (setq not-pref (car ihandles)))
6157         (when (or ibegend
6158                   (not preferred)
6159                   (not (gnus-unbuttonized-mime-type-p
6160                         "multipart/alternative")))
6161           (gnus-add-text-properties
6162            (setq from (point))
6163            (progn
6164              (insert (format "%d.  " id))
6165              (point))
6166            `(gnus-callback
6167              (lambda (handles)
6168                (unless ,(not ibegend)
6169                  (setq gnus-article-mime-handle-alist
6170                        ',gnus-article-mime-handle-alist))
6171                (gnus-mime-display-alternative
6172                 ',ihandles ',not-pref ',begend ,id))
6173              keymap ,gnus-mime-button-map
6174              ,gnus-mouse-face-prop ,gnus-article-mouse-face
6175              face ,gnus-article-button-face
6176              gnus-part ,id
6177              article-type multipart
6178              rear-nonsticky t))
6179           (widget-convert-button 'link from (point)
6180                                  :action 'gnus-widget-press-button
6181                                  :button-keymap gnus-widget-button-keymap)
6182           ;; Do the handles
6183           (while (setq handle (pop handles))
6184             (gnus-add-text-properties
6185              (setq from (point))
6186              (progn
6187                (insert (format "(%c) %-18s"
6188                                (if (equal handle preferred) ?* ? )
6189                                (mm-handle-media-type handle)))
6190                (point))
6191              `(gnus-callback
6192                (lambda (handles)
6193                  (unless ,(not ibegend)
6194                    (setq gnus-article-mime-handle-alist
6195                          ',gnus-article-mime-handle-alist))
6196                  (gnus-mime-display-alternative
6197                   ',ihandles ',handle ',begend ,id))
6198                keymap ,gnus-mime-button-map
6199                ,gnus-mouse-face-prop ,gnus-article-mouse-face
6200                face ,gnus-article-button-face
6201                gnus-part ,id
6202                gnus-data ,handle
6203                rear-nonsticky t))
6204             (widget-convert-button 'link from (point)
6205                                    :action 'gnus-widget-press-button
6206                                    :button-keymap gnus-widget-button-keymap)
6207             (insert "  "))
6208           (insert "\n\n"))
6209         (when preferred
6210           (if (stringp (car preferred))
6211               (gnus-display-mime preferred)
6212             (let ((mail-parse-charset gnus-newsgroup-charset)
6213                   (mail-parse-ignored-charsets
6214                    (with-current-buffer gnus-summary-buffer
6215                      gnus-newsgroup-ignored-charsets)))
6216               (gnus-bind-safe-url-regexp (mm-display-part preferred))
6217               ;; Do highlighting.
6218               (save-excursion
6219                 (save-restriction
6220                   (narrow-to-region (car begend) (point-max))
6221                   (gnus-treat-article
6222                    nil (length gnus-article-mime-handle-alist)
6223                    (gnus-article-mime-total-parts)
6224                    (mm-handle-media-type preferred))))))
6225           (goto-char (point-max))
6226           (setcdr begend (point-marker)))))
6227     (when ibegend
6228       (goto-char point)))
6229   ;; Redraw attachment buttons in the header.
6230   (when gnus-mime-display-attachment-buttons-in-header
6231     (gnus-mime-buttonize-attachments-in-header)))
6232
6233 (defconst gnus-article-wash-status-strings
6234   (let ((alist '((cite "c" "Possible hidden citation text"
6235                        " " "All citation text visible")
6236                  (headers "h" "Hidden headers"
6237                           " " "All headers visible.")
6238                  (pgp "p" "Encrypted or signed message status hidden"
6239                       " " "No hidden encryption nor digital signature status")
6240                  (signature "s" "Signature has been hidden"
6241                             " " "Signature is visible")
6242                  (overstrike "o" "Overstrike (^H) characters applied"
6243                              " " "No overstrike characters applied")
6244                  (emphasis "e" "/*_Emphasis_*/ characters applied"
6245                            " " "No /*_emphasis_*/ characters applied")))
6246         result)
6247     (dolist (entry alist result)
6248       (let ((key (nth 0 entry))
6249             (on (copy-sequence (nth 1 entry)))
6250             (on-help (nth 2 entry))
6251             (off (copy-sequence (nth 3 entry)))
6252             (off-help (nth 4 entry)))
6253         (put-text-property 0 1 'help-echo on-help on)
6254         (put-text-property 0 1 'help-echo off-help off)
6255         (push (list key on off) result))))
6256   "Alist of strings describing wash status in the mode line.
6257 Each entry has the form (KEY ON OF), where the KEY is a symbol
6258 representing the particular washing function, ON is the string to use
6259 in the article mode line when the washing function is active, and OFF
6260 is the string to use when it is inactive.")
6261
6262 (defun gnus-article-wash-status-entry (key value)
6263   (let ((entry (assoc key gnus-article-wash-status-strings)))
6264     (if value (nth 1 entry) (nth 2 entry))))
6265
6266 (defun gnus-article-wash-status ()
6267   "Return a string which display status of article washing."
6268   (with-current-buffer gnus-article-buffer
6269     (let ((cite (memq 'cite gnus-article-wash-types))
6270           (headers (memq 'headers gnus-article-wash-types))
6271           (boring (memq 'boring-headers gnus-article-wash-types))
6272           (pgp (memq 'pgp gnus-article-wash-types))
6273           (pem (memq 'pem gnus-article-wash-types))
6274           (signed (memq 'signed gnus-article-wash-types))
6275           (encrypted (memq 'encrypted gnus-article-wash-types))
6276           (signature (memq 'signature gnus-article-wash-types))
6277           (overstrike (memq 'overstrike gnus-article-wash-types))
6278           (emphasis (memq 'emphasis gnus-article-wash-types)))
6279       (concat
6280        (gnus-article-wash-status-entry 'cite cite)
6281        (gnus-article-wash-status-entry 'headers (or headers boring))
6282        (gnus-article-wash-status-entry 'pgp (or pgp pem signed encrypted))
6283        (gnus-article-wash-status-entry 'signature signature)
6284        (gnus-article-wash-status-entry 'overstrike overstrike)
6285        (gnus-article-wash-status-entry 'emphasis emphasis)))))
6286
6287 (defun gnus-add-wash-type (type)
6288   "Add a washing of TYPE to the current status."
6289   (add-to-list 'gnus-article-wash-types type))
6290
6291 (defun gnus-delete-wash-type (type)
6292   "Add a washing of TYPE to the current status."
6293   (setq gnus-article-wash-types (delq type gnus-article-wash-types)))
6294
6295 (defun gnus-add-image (category image)
6296   "Add IMAGE of CATEGORY to the list of displayed images."
6297   (let ((entry (assq category gnus-article-image-alist)))
6298     (unless entry
6299       (setq entry (list category))
6300       (push entry gnus-article-image-alist))
6301     (nconc entry (list image))))
6302
6303 (defun gnus-delete-images (category)
6304   "Delete all images in CATEGORY."
6305   (let ((entry (assq category gnus-article-image-alist)))
6306     (dolist (image (cdr entry))
6307       (gnus-remove-image image category))
6308     (setq gnus-article-image-alist (delq entry gnus-article-image-alist))
6309     (gnus-delete-wash-type category)))
6310
6311 (defalias 'gnus-article-hide-headers-if-wanted 'gnus-article-maybe-hide-headers)
6312
6313 (defun gnus-article-maybe-hide-headers ()
6314   "Hide unwanted headers if `gnus-have-all-headers' is nil.
6315 Provided for backwards compatibility."
6316   (when (and (or (not (gnus-buffer-live-p gnus-summary-buffer))
6317                  (not (with-current-buffer gnus-summary-buffer
6318                         gnus-have-all-headers)))
6319              (not gnus-inhibit-hiding))
6320     (gnus-article-hide-headers)))
6321
6322 (declare-function shr-put-image "shr" (data alt &optional flags))
6323
6324 (defun gnus-shr-put-image (data alt &optional flags)
6325   "Put image DATA with a string ALT.  Enable image to be deleted."
6326   (let ((image (if flags
6327                    (shr-put-image data (propertize (or alt "*")
6328                                                    'gnus-image-category 'shr)
6329                                   flags)
6330                  ;; Old `shr-put-image' doesn't take the optional `flags'
6331                  ;; argument.
6332                  (shr-put-image data (propertize (or alt "*")
6333                                                  'gnus-image-category 'shr)))))
6334     (when image
6335       (gnus-add-image 'shr image))))
6336
6337 (defun gnus-mime-buttonize-attachments-in-header (&optional interactive)
6338   "Show attachments as buttons in the end of the header of an article.
6339 This function toggles the display when called interactively.  Note that
6340 buttons to be added to the header are only the ones that aren't inlined
6341 in the body.  Use `gnus-header-face-alist' to highlight buttons."
6342   (interactive (list t))
6343   (gnus-with-article-buffer
6344     (gmm-labels
6345         ;; Function that returns a flattened version of
6346         ;; `gnus-article-mime-handle-alist'.
6347         ((flattened-alist
6348           (&optional alist id all)
6349           (if alist
6350               (let ((i 1) newid flat)
6351                 (dolist (handle alist flat)
6352                   (setq newid (append id (list i))
6353                         i (1+ i))
6354                   (if (stringp (car handle))
6355                       (setq flat (nconc flat (flattened-alist (cdr handle)
6356                                                               newid all)))
6357                     (delq (rassq handle all) all)
6358                     (setq flat (nconc flat (list (cons newid handle)))))))
6359             (let ((flat (list nil)))
6360               ;; Assume that elements of `gnus-article-mime-handle-alist'
6361               ;; are in the decreasing order, but unnumbered subsidiaries
6362               ;; in each element are in the increasing order.
6363               (dolist (handle (reverse gnus-article-mime-handle-alist))
6364                 (if (stringp (cadr handle))
6365                     (setq flat (nconc flat (flattened-alist (cddr handle)
6366                                                             (list (car handle))
6367                                                             flat)))
6368                   (delq (rassq (cdr handle) flat) flat)
6369                   (setq flat (nconc flat (list (cons (list (car handle))
6370                                                      (cdr handle)))))))
6371               (setq flat (cdr flat))
6372               (mapc (lambda (handle)
6373                       (if (cdar handle)
6374                           ;; This is a hidden (i.e. unnumbered) handle.
6375                           (progn
6376                             (setcar handle
6377                                     (1+ (caar gnus-article-mime-handle-alist)))
6378                             (push handle gnus-article-mime-handle-alist))
6379                         (setcar handle (caar handle))))
6380                     flat)
6381               flat))))
6382       (let ((case-fold-search t) buttons handle type st)
6383         (save-excursion
6384           (save-restriction
6385             (widen)
6386             (article-narrow-to-head)
6387             ;; Header buttons exist?
6388             (while (and (not buttons)
6389                         (re-search-forward "^attachments?:[\n ]+" nil t))
6390               (when (get-char-property (match-end 0)
6391                                        'gnus-button-attachment-extra)
6392                 (setq buttons (match-beginning 0))))
6393             (widen)
6394             (when buttons
6395               ;; Delete header buttons.
6396               (delete-region buttons (if (re-search-forward "^[^ ]" nil t)
6397                                          (match-beginning 0)
6398                                        (point-max))))
6399             (unless (and interactive buttons)
6400               ;; Find buttons.
6401               (setq buttons nil)
6402               (dolist (button (flattened-alist))
6403                 (setq handle (cdr button)
6404                       type (mm-handle-media-type handle))
6405                 (when (or (and (if (gnus-buffer-live-p gnus-summary-buffer)
6406                                    (with-current-buffer gnus-summary-buffer
6407                                      gnus-inhibit-images)
6408                                  gnus-inhibit-images)
6409                                (string-match "\\`image/" type))
6410                           (mm-inline-override-p handle)
6411                           (and (mm-handle-disposition handle)
6412                                (not (equal (car (mm-handle-disposition handle))
6413                                            "inline"))
6414                                (not (mm-attachment-override-p handle)))
6415                           (not (mm-automatic-display-p handle))
6416                           (not (or (and (mm-inlinable-p handle)
6417                                         (mm-inlined-p handle))
6418                                    (mm-automatic-external-display-p type))))
6419                   (push button buttons)))
6420               (when buttons
6421                 ;; Add header buttons.
6422                 (article-goto-body)
6423                 (forward-line -1)
6424                 (narrow-to-region (point) (point))
6425                 (insert "Attachment" (if (cdr buttons) "s" "") ":")
6426                 (dolist (button (nreverse buttons))
6427                   (setq st (point))
6428                   (insert " ")
6429                   (mm-handle-set-undisplayer
6430                    (setq handle (copy-sequence (cdr button))) nil)
6431                   (gnus-insert-mime-button handle (car button))
6432                   (skip-chars-backward "\t\n ")
6433                   (delete-region (point) (point-max))
6434                   (when (> (current-column) (window-width))
6435                     (goto-char st)
6436                     (insert "\n")
6437                     (end-of-line)))
6438                 (insert "\n")
6439                 (dolist (ovl (gnus-overlays-in (point-min) (point)))
6440                   (gnus-overlay-put ovl 'gnus-button-attachment-extra t)
6441                   (gnus-overlay-put ovl 'face nil))
6442                 (let ((gnus-treatment-function-alist
6443                        '((gnus-treat-highlight-headers
6444                           gnus-article-highlight-headers))))
6445                   (gnus-treat-article 'head))))))))))
6446
6447 ;;; Article savers.
6448
6449 (defun gnus-output-to-file (file-name)
6450   "Append the current article to a file named FILE-NAME.
6451 If `gnus-article-save-coding-system' is non-nil, it is used to encode
6452 text and used as the value of the coding cookie which is added to the
6453 top of a file.  Otherwise, this function saves a raw article without
6454 the coding cookie."
6455   (let* ((artbuf (current-buffer))
6456          (file-name-coding-system nnmail-pathname-coding-system)
6457          (coding gnus-article-save-coding-system)
6458          (coding-system-for-read (if coding
6459                                      nil ;; Rely on the coding cookie.
6460                                    mm-text-coding-system))
6461          (coding-system-for-write (or coding
6462                                       mm-text-coding-system-for-write
6463                                       mm-text-coding-system))
6464          (exists (file-exists-p file-name)))
6465     (with-temp-buffer
6466       (when exists
6467         (insert-file-contents file-name)
6468         (goto-char (point-min))
6469         ;; Remove the existing coding cookie.
6470         (when (looking-at "X-Gnus-Coding-System: .+\n\n")
6471           (delete-region (match-beginning 0) (match-end 0))))
6472       (goto-char (point-max))
6473       (insert-buffer-substring artbuf)
6474       ;; Append newline at end of the buffer as separator, and then
6475       ;; save it to file.
6476       (goto-char (point-max))
6477       (insert "\n")
6478       (when coding
6479         ;; If the coding system is not suitable to encode the text,
6480         ;; ask a user for a proper one.
6481         (when (fboundp 'select-safe-coding-system)
6482           (setq coding (coding-system-base
6483                         (save-window-excursion
6484                           (select-safe-coding-system (point-min) (point-max)
6485                                                      coding))))
6486           (setq coding-system-for-write
6487                 (or (cdr (assq coding '((mule-utf-8 . utf-8))))
6488                     coding)))
6489         (goto-char (point-min))
6490         ;; Add the coding cookie.
6491         (insert (format "X-Gnus-Coding-System: -*- coding: %s; -*-\n\n"
6492                         coding-system-for-write)))
6493       (if exists
6494           (progn
6495             (write-region (point-min) (point-max) file-name nil 'no-message)
6496             (message "Appended to %s" file-name))
6497         (write-region (point-min) (point-max) file-name))))
6498   t)
6499
6500 (defun gnus-narrow-to-page (&optional arg)
6501   "Narrow the article buffer to a page.
6502 If given a numerical ARG, move forward ARG pages."
6503   (interactive "P")
6504   (setq arg (if arg (prefix-numeric-value arg) 0))
6505   (with-current-buffer gnus-article-buffer
6506     (widen)
6507     ;; Remove any old next/prev buttons.
6508     (when (gnus-visual-p 'page-marker)
6509       (let ((inhibit-read-only t))
6510         (gnus-remove-text-with-property 'gnus-prev)
6511         (gnus-remove-text-with-property 'gnus-next)))
6512     (let (st nd pt)
6513       (when (save-excursion
6514               (cond ((< arg 0)
6515                      (if (re-search-backward page-delimiter nil 'move (abs arg))
6516                          (prog1
6517                              (setq nd (match-beginning 0)
6518                                    pt nd)
6519                            (when (re-search-backward page-delimiter nil t)
6520                              (setq st (match-end 0))))
6521                        (when (re-search-forward page-delimiter nil t)
6522                          (setq nd (match-beginning 0)
6523                                pt (point-min)))))
6524                     ((> arg 0)
6525                      (if (re-search-forward page-delimiter nil 'move arg)
6526                          (prog1
6527                              (setq st (match-end 0)
6528                                    pt st)
6529                            (when (re-search-forward page-delimiter nil t)
6530                              (setq nd (match-beginning 0))))
6531                        (when (re-search-backward page-delimiter nil t)
6532                          (setq st (match-end 0)
6533                                pt (point-max)))))
6534                     (t
6535                      (when (re-search-backward page-delimiter nil t)
6536                        (goto-char (setq st (match-end 0))))
6537                      (when (re-search-forward page-delimiter nil t)
6538                        (setq nd (match-beginning 0)))
6539                      (or st nd))))
6540         (setq gnus-page-broken t)
6541         (when pt (goto-char pt))
6542         (narrow-to-region (or st (point-min)) (or nd (point-max)))
6543         (when (gnus-visual-p 'page-marker)
6544           (save-excursion
6545             (when nd
6546               (goto-char nd)
6547               (gnus-insert-next-page-button))
6548             (when st
6549               (goto-char st)
6550               (gnus-insert-prev-page-button))))))))
6551
6552 ;; Article mode commands
6553
6554 (defun gnus-article-goto-next-page ()
6555   "Show the next page of the article."
6556   (interactive)
6557   (when (gnus-article-next-page)
6558     (goto-char (point-min))
6559     (gnus-article-read-summary-keys nil (gnus-character-to-event ?n))))
6560
6561
6562 (defun gnus-article-goto-prev-page ()
6563   "Show the previous page of the article."
6564   (interactive)
6565   (if (save-restriction (widen) (bobp)) ;; Real beginning-of-buffer?
6566       (gnus-article-read-summary-keys nil (gnus-character-to-event ?p))
6567     (gnus-article-prev-page nil)))
6568
6569 ;; This is cleaner but currently breaks `gnus-pick-mode':
6570 ;;
6571 ;; (defun gnus-article-goto-next-page ()
6572 ;;   "Show the next page of the article."
6573 ;;   (interactive)
6574 ;;   (gnus-eval-in-buffer-window gnus-summary-buffer
6575 ;;     (gnus-summary-next-page)))
6576 ;;
6577 ;; (defun gnus-article-goto-prev-page ()
6578 ;;   "Show the next page of the article."
6579 ;;   (interactive)
6580 ;;   (gnus-eval-in-buffer-window gnus-summary-buffer
6581 ;;     (gnus-summary-prev-page)))
6582
6583 (defun gnus-article-next-page (&optional lines)
6584   "Show the next page of the current article.
6585 If end of article, return non-nil.  Otherwise return nil.
6586 Argument LINES specifies lines to be scrolled up."
6587   (interactive "p")
6588   (move-to-window-line (if (featurep 'xemacs) -1 (- -1 scroll-margin)))
6589   (if (and (not (and gnus-article-over-scroll
6590                      (> (count-lines (window-start) (point-max))
6591                         (if (featurep 'xemacs)
6592                             (or lines (1- (window-height)))
6593                           (+ (or lines (1- (window-height))) scroll-margin)))))
6594            (save-excursion
6595              (end-of-line)
6596              (and (pos-visible-in-window-p)     ;Not continuation line.
6597                   (>= (point) (point-max)))))
6598       ;; Nothing in this page.
6599       (if (or (not gnus-page-broken)
6600               (save-excursion
6601                 (save-restriction
6602                   (widen)
6603                   (forward-line)
6604                   (eobp)))) ;Real end-of-buffer?
6605           (progn
6606             (when gnus-article-over-scroll
6607               (gnus-article-next-page-1 lines))
6608             t)                  ;Nothing more.
6609         (gnus-narrow-to-page 1)         ;Go to next page.
6610         nil)
6611     ;; More in this page.
6612     (gnus-article-next-page-1 lines)
6613     nil))
6614
6615 (defun gnus-article-beginning-of-window ()
6616   "Move point to the beginning of the window.
6617 In Emacs, the point is placed at the line number which `scroll-margin'
6618 specifies."
6619   (if (featurep 'xemacs)
6620       (move-to-window-line 0)
6621     ;; There is an obscure bug in Emacs that makes it impossible to
6622     ;; scroll past big pictures in the article buffer.  Try to fix
6623     ;; this by adding a sanity check by counting the lines visible.
6624     (when (> (count-lines (window-start) (window-end)) 30)
6625       (move-to-window-line
6626        (min (max 0 scroll-margin)
6627             (max 1 (- (window-height)
6628                       (if mode-line-format 1 0)
6629                       (if header-line-format 1 0)
6630                       2)))))))
6631
6632 (defun gnus-article-next-page-1 (lines)
6633   (condition-case ()
6634       (let ((scroll-in-place nil)
6635             (auto-window-vscroll nil))
6636         (scroll-up lines))
6637     (end-of-buffer
6638      ;; Long lines may cause an end-of-buffer error.
6639      (goto-char (point-max))))
6640   (gnus-article-beginning-of-window))
6641
6642 (defun gnus-article-prev-page (&optional lines)
6643   "Show previous page of current article.
6644 Argument LINES specifies lines to be scrolled down."
6645   (interactive "p")
6646   (move-to-window-line 0)
6647   (if (and gnus-page-broken
6648            (bobp)
6649            (not (save-restriction (widen) (bobp)))) ;Real beginning-of-buffer?
6650       (progn
6651         (gnus-narrow-to-page -1)        ;Go to previous page.
6652         (goto-char (point-max))
6653         (recenter (if gnus-article-over-scroll
6654                       (if lines
6655                           (max (if (featurep 'xemacs)
6656                                    lines
6657                                  (+ lines scroll-margin))
6658                                3)
6659                         (- (window-height) 2))
6660                     -1)))
6661     (prog1
6662         (condition-case ()
6663             (let ((scroll-in-place nil))
6664               (scroll-down lines))
6665           (beginning-of-buffer
6666            (goto-char (point-min))))
6667       (gnus-article-beginning-of-window))))
6668
6669 (defun gnus-article-only-boring-p ()
6670   "Decide whether there is only boring text remaining in the article.
6671 Something \"interesting\" is a word of at least two letters that does
6672 not have a face in `gnus-article-boring-faces'."
6673   (when (and gnus-article-skip-boring
6674              (boundp 'gnus-article-boring-faces)
6675              (symbol-value 'gnus-article-boring-faces))
6676     (save-excursion
6677       (let ((inhibit-point-motion-hooks t))
6678         (catch 'only-boring
6679           (while (re-search-forward "\\b\\w\\w" nil t)
6680             (forward-char -1)
6681             (when (not (gnus-intersection
6682                         (gnus-faces-at (point))
6683                         (symbol-value 'gnus-article-boring-faces)))
6684               (throw 'only-boring nil)))
6685           (throw 'only-boring t))))))
6686
6687 (defun gnus-article-refer-article ()
6688   "Read article specified by message-id around point."
6689   (interactive)
6690   (save-excursion
6691     (re-search-backward "[ \t]\\|^" (point-at-bol) t)
6692     (re-search-forward "<?news:<?\\|<" (point-at-eol) t)
6693     (if (re-search-forward "[^@ ]+@[^ \t>]+" (point-at-eol) t)
6694         (let ((msg-id (concat "<" (match-string 0) ">")))
6695           (set-buffer gnus-summary-buffer)
6696           (gnus-summary-refer-article msg-id))
6697       (error "No references around point"))))
6698
6699 (defun gnus-article-show-summary ()
6700   "Reconfigure windows to show summary buffer."
6701   (interactive)
6702   (if (not (gnus-buffer-live-p gnus-summary-buffer))
6703       (error "There is no summary buffer for this article buffer")
6704     (gnus-article-set-globals)
6705     (gnus-configure-windows 'article)
6706     (gnus-summary-goto-subject gnus-current-article)
6707     (gnus-summary-position-point)))
6708
6709 (defun gnus-article-describe-briefly ()
6710   "Describe article mode commands briefly."
6711   (interactive)
6712   (gnus-message 6 "%s" (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")))
6713
6714 (defun gnus-article-check-buffer ()
6715   "Beep if not in an article buffer."
6716   (unless (derived-mode-p 'gnus-article-mode)
6717     (error "Command invoked outside of a Gnus article buffer")))
6718
6719 (defun gnus-article-read-summary-keys (&optional arg key not-restore-window)
6720   "Read a summary buffer key sequence and execute it from the article buffer."
6721   (interactive "P")
6722   (gnus-article-check-buffer)
6723   (let ((nosaves
6724          '("q" "Q"  "c" "r" "\C-c\C-f" "m"  "a" "f"
6725            "Zc" "ZC" "ZE" "ZQ" "ZZ" "Zn" "ZR" "ZG" "ZN" "ZP"
6726            "=" "^" "\M-^" "|"))
6727         (nosave-but-article
6728          '("A " "A<" "A>" "AM" "AP" "AR" "AT" "A\C-?" "A\M-\r" "A\r" "Ab" "Ae"
6729            "An" "Ap" [?A (meta return)] [?A delete]))
6730         (nosave-in-article
6731          '("AS" "\C-d"))
6732         (up-to-top
6733          '("n" "Gn" "p" "Gp"))
6734         keys new-sum-point)
6735     (with-current-buffer gnus-article-current-summary
6736       (let (gnus-pick-mode)
6737         (setq unread-command-events (nconc unread-command-events
6738                                            (list (or key last-command-event)))
6739               keys (if (featurep 'xemacs)
6740                        (events-to-keys (read-key-sequence nil t))
6741                      (read-key-sequence nil t)))))
6742
6743     (message "")
6744
6745     (cond
6746      ((eq (aref keys (1- (length keys))) ?\C-h)
6747       (gnus-article-describe-bindings (substring keys 0 -1)))
6748      ((or (member keys nosaves)
6749           (member keys nosave-but-article)
6750           (member keys nosave-in-article))
6751       (let (func)
6752         (save-window-excursion
6753           (pop-to-buffer gnus-article-current-summary)
6754           ;; We disable the pick minor mode commands.
6755           (let (gnus-pick-mode)
6756             (setq func (key-binding keys t))))
6757         (if (or (not func)
6758                 (numberp func))
6759             (ding)
6760           (unless (member keys nosave-in-article)
6761             (set-buffer gnus-article-current-summary))
6762           (when (and (symbolp func)
6763                      (get func 'disabled))
6764             (error "Function %s disabled" func))
6765           (call-interactively func)
6766           (setq new-sum-point (point)))
6767         (when (member keys nosave-but-article)
6768           (pop-to-buffer gnus-article-buffer))))
6769      (t
6770       ;; These commands should restore window configuration.
6771       (let ((obuf (current-buffer))
6772             (owin (current-window-configuration))
6773             win func in-buffer selected new-sum-start new-sum-hscroll err)
6774         (cond (not-restore-window
6775                (pop-to-buffer gnus-article-current-summary)
6776                (setq win (selected-window)))
6777               ((setq win (get-buffer-window gnus-article-current-summary))
6778                (select-window win))
6779               (t
6780                (let ((summary-buffer gnus-article-current-summary))
6781                  (gnus-configure-windows 'article)
6782                  (unless (setq win (get-buffer-window summary-buffer 'visible))
6783                    (let ((gnus-buffer-configuration
6784                           '((article ((vertical 1.0
6785                                                 (summary 0.25 point)
6786                                                 (article 1.0)))))))
6787                      (gnus-configure-windows 'article))
6788                    (setq win (get-buffer-window summary-buffer 'visible)))
6789                  (gnus-select-frame-set-input-focus (window-frame win))
6790                  (select-window win))))
6791         (setq in-buffer (current-buffer))
6792         ;; We disable the pick minor mode commands.
6793         (setq func (let (gnus-pick-mode)
6794                      (key-binding keys t)))
6795         (when (get func 'disabled)
6796           (error "Function %s disabled" func))
6797         (if (and func
6798                  (functionp func)
6799                  (condition-case code
6800                      (progn
6801                        (call-interactively func)
6802                        t)
6803                    (error
6804                     (setq err code)
6805                     nil)))
6806             (progn
6807               (when (eq win (selected-window))
6808                 (setq new-sum-point (point)
6809                       new-sum-start (window-start win)
6810                       new-sum-hscroll (window-hscroll win)))
6811               (when (or (eq in-buffer (current-buffer))
6812                         (when (eq obuf (current-buffer))
6813                           (set-buffer in-buffer)
6814                           t))
6815                 (setq selected (ignore-errors (gnus-summary-select-article)))
6816                 (set-buffer obuf)
6817                 (unless not-restore-window
6818                   (set-window-configuration owin))
6819                 (when (and (eq selected 'old)
6820                            new-sum-point)
6821                   (set-window-start (get-buffer-window (current-buffer))
6822                                     1)
6823                   (set-window-point (get-buffer-window (current-buffer))
6824                                     (if (article-goto-body)
6825                                         (1- (point))
6826                                       (point))))
6827                 (when (and (not not-restore-window)
6828                            new-sum-point
6829                            (window-live-p win)
6830                            (with-current-buffer (window-buffer win)
6831                              (derived-mode-p 'gnus-summary-mode)))
6832                   (set-window-point win new-sum-point)
6833                   (set-window-start win new-sum-start)
6834                   (set-window-hscroll win new-sum-hscroll))))
6835           (set-window-configuration owin)
6836           (if err
6837               (signal (car err) (cdr err))
6838             (ding))))))))
6839
6840 (defun gnus-article-read-summary-send-keys ()
6841   (interactive)
6842   (let ((unread-command-events (list (gnus-character-to-event ?S))))
6843     (gnus-article-read-summary-keys)))
6844
6845 (defun gnus-article-describe-key (key)
6846   "Display documentation of the function invoked by KEY.
6847 KEY is a string or a vector."
6848   (interactive (list (let ((cursor-in-echo-area t)) ;; better for XEmacs.
6849                        (read-key-sequence "Describe key: "))))
6850   (gnus-article-check-buffer)
6851   (if (memq (key-binding key t) '(gnus-article-read-summary-keys
6852                                   gnus-article-read-summary-send-keys))
6853       (with-current-buffer gnus-article-current-summary
6854         (setq unread-command-events
6855               (if (featurep 'xemacs)
6856                   (append key nil)
6857                 (mapcar (lambda (x) (if (and (integerp x) (>= x 128))
6858                                         (list 'meta (- x 128))
6859                                       x))
6860                         key)))
6861         (let ((cursor-in-echo-area t)
6862               gnus-pick-mode)
6863           (describe-key (read-key-sequence nil t))))
6864     (describe-key key)))
6865
6866 (defun gnus-article-describe-key-briefly (key &optional insert)
6867   "Display documentation of the function invoked by KEY.
6868 KEY is a string or a vector."
6869   (interactive (list (let ((cursor-in-echo-area t)) ;; better for XEmacs.
6870                        (read-key-sequence "Describe key: "))
6871                      current-prefix-arg))
6872   (gnus-article-check-buffer)
6873   (if (memq (key-binding key t) '(gnus-article-read-summary-keys
6874                                   gnus-article-read-summary-send-keys))
6875       (with-current-buffer gnus-article-current-summary
6876         (setq unread-command-events
6877               (if (featurep 'xemacs)
6878                   (append key nil)
6879                 (mapcar (lambda (x) (if (and (integerp x) (>= x 128))
6880                                         (list 'meta (- x 128))
6881                                       x))
6882                         key)))
6883         (let ((cursor-in-echo-area t)
6884               gnus-pick-mode)
6885           (describe-key-briefly (read-key-sequence nil t) insert)))
6886     (describe-key-briefly key insert)))
6887
6888 ;;`gnus-agent-mode' in gnus-agent.el will define it.
6889 (defvar gnus-agent-summary-mode)
6890 (defvar gnus-draft-mode)
6891 (defvar help-xref-stack-item)
6892
6893 (defun gnus-article-describe-bindings (&optional prefix)
6894   "Show a list of all defined keys, and their definitions.
6895 The optional argument PREFIX, if non-nil, should be a key sequence;
6896 then we display only bindings that start with that prefix."
6897   (interactive)
6898   (gnus-article-check-buffer)
6899   (let ((keymap (copy-keymap gnus-article-mode-map))
6900         (map (copy-keymap gnus-article-send-map))
6901         (sumkeys (where-is-internal 'gnus-article-read-summary-keys))
6902         parent agent draft)
6903     (define-key keymap "S" map)
6904     (define-key map [t] nil)
6905     (with-current-buffer gnus-article-current-summary
6906       (set-keymap-parent
6907        keymap
6908        (if (setq parent (keymap-parent gnus-article-mode-map))
6909            (prog1
6910                (setq parent (copy-keymap parent))
6911              (set-keymap-parent parent (current-local-map)))
6912          (current-local-map)))
6913       (set-keymap-parent map (key-binding "S"))
6914       (let (key def gnus-pick-mode)
6915         (while sumkeys
6916           (setq key (pop sumkeys))
6917           (cond ((and (vectorp key) (= (length key) 1)
6918                       (consp (setq def (aref key 0)))
6919                       (numberp (car def)) (numberp (cdr def)))
6920                  (when (< (max (car def) (cdr def)) 128)
6921                    (setq sumkeys
6922                          (append (mapcar
6923                                   #'vector
6924                                   (nreverse (gnus-uncompress-range def)))
6925                                  sumkeys))))
6926                 ((setq def (key-binding key))
6927                  (unless (eq def 'undefined)
6928                    (define-key keymap key def))))))
6929       (when (boundp 'gnus-agent-summary-mode)
6930         (setq agent gnus-agent-summary-mode))
6931       (when (boundp 'gnus-draft-mode)
6932         (setq draft gnus-draft-mode)))
6933     (with-temp-buffer
6934       (use-local-map keymap)
6935       (set (make-local-variable 'gnus-agent-summary-mode) agent)
6936       (set (make-local-variable 'gnus-draft-mode) draft)
6937       (describe-bindings prefix))
6938     (let ((item `((lambda (prefix)
6939                     (with-current-buffer ,(current-buffer)
6940                       (gnus-article-describe-bindings prefix)))
6941                   ,prefix)))
6942       ;; Loading `help-mode' here is necessary if `describe-bindings'
6943       ;; is replaced with something, e.g. `helm-descbinds'.
6944       (require 'help-mode)
6945       (with-current-buffer (let (help-xref-following) (help-buffer))
6946         (setq help-xref-stack-item item)))))
6947
6948 (defun gnus-article-reply-with-original (&optional wide)
6949   "Start composing a reply mail to the current message.
6950 The text in the region will be yanked.  If the region isn't active,
6951 the entire article will be yanked."
6952   (interactive)
6953   (let ((article (cdr gnus-article-current))
6954         contents)
6955     (if (not (gnus-region-active-p))
6956         (with-current-buffer gnus-summary-buffer
6957           (gnus-summary-reply (list (list article)) wide))
6958       (setq contents (buffer-substring (point) (mark t)))
6959       ;; Deactivate active regions.
6960       (when (and (boundp 'transient-mark-mode)
6961                  transient-mark-mode)
6962         (setq mark-active nil))
6963       (with-current-buffer gnus-summary-buffer
6964         (gnus-summary-reply
6965          (list (list article contents)) wide)))))
6966
6967 (defun gnus-article-wide-reply-with-original ()
6968   "Start composing a wide reply mail to the current message.
6969 The text in the region will be yanked.  If the region isn't active,
6970 the entire article will be yanked."
6971   (interactive)
6972   (gnus-article-reply-with-original t))
6973
6974 (defun gnus-article-followup-with-original ()
6975   "Compose a followup to the current article.
6976 The text in the region will be yanked.  If the region isn't active,
6977 the entire article will be yanked."
6978   (interactive)
6979   (let ((article (cdr gnus-article-current))
6980         contents)
6981       (if (not (gnus-region-active-p))
6982           (with-current-buffer gnus-summary-buffer
6983             (gnus-summary-followup (list (list article))))
6984         (setq contents (buffer-substring (point) (mark t)))
6985         ;; Deactivate active regions.
6986         (when (and (boundp 'transient-mark-mode)
6987                    transient-mark-mode)
6988           (setq mark-active nil))
6989         (with-current-buffer gnus-summary-buffer
6990           (gnus-summary-followup
6991            (list (list article contents)))))))
6992
6993 (defun gnus-article-hide (&optional arg force)
6994   "Hide all the gruft in the current article.
6995 This means that signatures, cited text and (some) headers will be
6996 hidden.
6997 If given a prefix, show the hidden text instead."
6998   (interactive (append (gnus-article-hidden-arg) (list 'force)))
6999   (gnus-article-hide-headers arg)
7000   (gnus-article-hide-list-identifiers arg)
7001   (gnus-article-hide-citation-maybe arg force)
7002   (gnus-article-hide-signature arg))
7003
7004 (defun gnus-check-group-server ()
7005   ;; Make sure the connection to the server is alive.
7006   (unless (gnus-server-opened
7007            (gnus-find-method-for-group gnus-newsgroup-name))
7008     (gnus-check-server (gnus-find-method-for-group gnus-newsgroup-name))
7009     (gnus-request-group gnus-newsgroup-name t)))
7010
7011 (eval-when-compile
7012   (autoload 'nneething-get-file-name "nneething"))
7013
7014 (defun gnus-request-article-this-buffer (article group)
7015   "Get an article and insert it into this buffer."
7016   (let (do-update-line sparse-header)
7017     (prog1
7018         (save-excursion
7019           (erase-buffer)
7020           (gnus-kill-all-overlays)
7021           (setq group (or group gnus-newsgroup-name))
7022
7023           ;; Using `gnus-request-article' directly will insert the article into
7024           ;; `nntp-server-buffer' - so we'll save some time by not having to
7025           ;; copy it from the server buffer into the article buffer.
7026
7027           ;; We only request an article by message-id when we do not have the
7028           ;; headers for it, so we'll have to get those.
7029           (when (stringp article)
7030             (gnus-read-header article))
7031
7032           ;; If the article number is negative, that means that this article
7033           ;; doesn't belong in this newsgroup (possibly), so we find its
7034           ;; message-id and request it by id instead of number.
7035           (when (and (numberp article)
7036                      gnus-summary-buffer
7037                      (get-buffer gnus-summary-buffer)
7038                      (gnus-buffer-exists-p gnus-summary-buffer))
7039             (with-current-buffer gnus-summary-buffer
7040               (let ((header (gnus-summary-article-header article)))
7041                 (when (< article 0)
7042                   (cond
7043                    ((memq article gnus-newsgroup-sparse)
7044                     ;; This is a sparse gap article.
7045                     (setq do-update-line article)
7046                     (setq article (mail-header-id header))
7047                     (setq sparse-header (gnus-read-header article))
7048                     (setq gnus-newsgroup-sparse
7049                           (delq article gnus-newsgroup-sparse)))
7050                    ((vectorp header)
7051                     ;; It's a real article.
7052                     (setq article (mail-header-id header)))
7053                    (t
7054                     ;; It is an extracted pseudo-article.
7055                     (setq article 'pseudo)
7056                     (gnus-request-pseudo-article header))))
7057
7058                 (let ((method (gnus-find-method-for-group
7059                                gnus-newsgroup-name)))
7060                   (when (and (eq (car method) 'nneething)
7061                              (vectorp header))
7062                     (let ((dir (nneething-get-file-name
7063                                 (mail-header-id header))))
7064                       (when (and (stringp dir)
7065                                  (file-directory-p dir))
7066                         (setq article 'nneething)
7067                         (gnus-group-enter-directory dir))))))))
7068
7069           (cond
7070            ;; Refuse to select canceled articles.
7071            ((and (numberp article)
7072                  gnus-summary-buffer
7073                  (get-buffer gnus-summary-buffer)
7074                  (gnus-buffer-exists-p gnus-summary-buffer)
7075                  (eq (cdr (with-current-buffer gnus-summary-buffer
7076                             (assq article gnus-newsgroup-reads)))
7077                      gnus-canceled-mark))
7078             nil)
7079            ;; We first check `gnus-original-article-buffer'.
7080            ((and (get-buffer gnus-original-article-buffer)
7081                  (numberp article)
7082                  (with-current-buffer gnus-original-article-buffer
7083                    (and (equal (car gnus-original-article) group)
7084                         (eq (cdr gnus-original-article) article))))
7085             ;; `insert-buffer-substring' would incorrectly use the
7086             ;; equivalent of string-make-multibyte which amount to decoding
7087             ;; with locale-coding-system, causing failure of
7088             ;; subsequent decoding.
7089             (insert (mm-string-to-multibyte
7090                      (with-current-buffer gnus-original-article-buffer
7091                        (buffer-substring (point-min) (point-max)))))
7092             'article)
7093            ;; Check the backlog.
7094            ((and gnus-keep-backlog
7095                  (gnus-backlog-request-article group article (current-buffer)))
7096             'article)
7097            ;; Check asynchronous pre-fetch.
7098            ((gnus-async-request-fetched-article group article (current-buffer))
7099             (gnus-async-prefetch-next group article gnus-summary-buffer)
7100             (when (and (numberp article) gnus-keep-backlog)
7101               (gnus-backlog-enter-article group article (current-buffer)))
7102             'article)
7103            ;; Check the cache.
7104            ((and gnus-use-cache
7105                  (numberp article)
7106                  (gnus-cache-request-article article group))
7107             'article)
7108            ;; Check the agent cache.
7109            ((gnus-agent-request-article article group)
7110             'article)
7111            ;; Get the article and put into the article buffer.
7112            ((or (stringp article)
7113                 (numberp article))
7114             (let ((gnus-override-method gnus-override-method)
7115                   (methods (and (stringp article)
7116                                 (with-current-buffer gnus-summary-buffer
7117                                   (gnus-refer-article-methods))))
7118                   (backend (car (gnus-find-method-for-group
7119                                  gnus-newsgroup-name)))
7120                   result
7121                   (inhibit-read-only t))
7122               (when (and (null gnus-override-method)
7123                          methods)
7124                 (setq gnus-override-method (pop methods)))
7125               (while (not result)
7126                 (erase-buffer)
7127                 (gnus-kill-all-overlays)
7128                 (let ((gnus-newsgroup-name group))
7129                   (gnus-check-group-server))
7130                 (cond
7131                  ((gnus-request-article article group (current-buffer))
7132                   (when (numberp article)
7133                     (gnus-async-prefetch-next group article
7134                                               gnus-summary-buffer)
7135                     (when gnus-keep-backlog
7136                       (gnus-backlog-enter-article
7137                        group article (current-buffer)))
7138                     (when (and gnus-agent
7139                                (gnus-agent-group-covered-p group))
7140                       (gnus-agent-store-article article group)))
7141                   (setq result 'article))
7142                  (methods
7143                   (setq gnus-override-method (pop methods)))
7144                  ((not (string-match "^400 "
7145                                      (nnheader-get-report backend)))
7146                   ;; If we get 400 server disconnect, reconnect and
7147                   ;; retry; otherwise, assume the article has expired.
7148                   (setq result 'done))))
7149               (and (eq result 'article) 'article)))
7150            ;; It was a pseudo.
7151            (t article)))
7152
7153       ;; Associate this article with the current summary buffer.
7154       (setq gnus-article-current-summary gnus-summary-buffer)
7155
7156       ;; Take the article from the original article buffer
7157       ;; and place it in the buffer it's supposed to be in.
7158       (when (and (get-buffer gnus-article-buffer)
7159                  (equal (buffer-name (current-buffer))
7160                         (buffer-name (get-buffer gnus-article-buffer))))
7161         (save-excursion
7162           (if (get-buffer gnus-original-article-buffer)
7163               (set-buffer gnus-original-article-buffer)
7164             (set-buffer (gnus-get-buffer-create gnus-original-article-buffer))
7165             (buffer-disable-undo)
7166             (setq major-mode 'gnus-original-article-mode)
7167             (setq buffer-read-only t))
7168           (let ((inhibit-read-only t))
7169             (erase-buffer)
7170             (insert-buffer-substring gnus-article-buffer))
7171           (setq gnus-original-article (cons group article)))
7172
7173         ;; Decode charsets.
7174         (run-hooks 'gnus-article-decode-hook)
7175         ;; Mark article as decoded or not.
7176         (setq gnus-article-decoded-p gnus-article-decode-hook))
7177
7178       ;; Update sparse articles.
7179       (when (and do-update-line
7180                  (or (numberp article)
7181                      (stringp article)))
7182         (let ((buf (current-buffer)))
7183           (set-buffer gnus-summary-buffer)
7184           (gnus-summary-update-article do-update-line sparse-header)
7185           (gnus-summary-goto-subject do-update-line nil t)
7186           (set-window-point (gnus-get-buffer-window (current-buffer) t)
7187                             (point))
7188           (set-buffer buf))))))
7189
7190 (defun gnus-block-private-groups (group)
7191   (if (or (gnus-news-group-p group)
7192           (gnus-member-of-valid 'global group))
7193       ;; Block nothing in news groups.
7194       nil
7195     ;; Block everything anywhere else.
7196     "."))
7197
7198 (defun gnus-blocked-images ()
7199   (if (functionp gnus-blocked-images)
7200       (funcall gnus-blocked-images gnus-newsgroup-name)
7201     gnus-blocked-images))
7202
7203 ;;;
7204 ;;; Article editing
7205 ;;;
7206
7207 (defcustom gnus-article-edit-mode-hook nil
7208   "Hook run in article edit mode buffers."
7209   :group 'gnus-article-various
7210   :type 'hook)
7211
7212 (defvar gnus-article-edit-done-function nil)
7213
7214 (defvar gnus-article-edit-mode-map nil)
7215
7216 ;; Should we be using derived.el for this?
7217 (unless gnus-article-edit-mode-map
7218   (setq gnus-article-edit-mode-map (make-keymap))
7219   (set-keymap-parent gnus-article-edit-mode-map text-mode-map)
7220
7221   (gnus-define-keys gnus-article-edit-mode-map
7222     "\C-c?"    describe-mode
7223     "\C-c\C-c" gnus-article-edit-done
7224     "\C-c\C-k" gnus-article-edit-exit
7225     "\C-c\C-f\C-t" message-goto-to
7226     "\C-c\C-f\C-o" message-goto-from
7227     "\C-c\C-f\C-b" message-goto-bcc
7228     ;;"\C-c\C-f\C-w" message-goto-fcc
7229     "\C-c\C-f\C-c" message-goto-cc
7230     "\C-c\C-f\C-s" message-goto-subject
7231     "\C-c\C-f\C-r" message-goto-reply-to
7232     "\C-c\C-f\C-n" message-goto-newsgroups
7233     "\C-c\C-f\C-d" message-goto-distribution
7234     "\C-c\C-f\C-f" message-goto-followup-to
7235     "\C-c\C-f\C-m" message-goto-mail-followup-to
7236     "\C-c\C-f\C-k" message-goto-keywords
7237     "\C-c\C-f\C-u" message-goto-summary
7238     "\C-c\C-f\C-i" message-insert-or-toggle-importance
7239     "\C-c\C-f\C-a" message-generate-unsubscribed-mail-followup-to
7240     "\C-c\C-b" message-goto-body
7241     "\C-c\C-i" message-goto-signature
7242
7243     "\C-c\C-t" message-insert-to
7244     "\C-c\C-n" message-insert-newsgroups
7245     "\C-c\C-o" message-sort-headers
7246     "\C-c\C-e" message-elide-region
7247     "\C-c\C-v" message-delete-not-region
7248     "\C-c\C-z" message-kill-to-signature
7249     "\M-\r" message-newline-and-reformat
7250     "\C-c\C-a" mml-attach-file
7251     "\C-a" message-beginning-of-line
7252     "\t" message-tab
7253     "\M-;" comment-region)
7254
7255   (gnus-define-keys (gnus-article-edit-wash-map
7256                      "\C-c\C-w" gnus-article-edit-mode-map)
7257     "f" gnus-article-edit-full-stops))
7258
7259 (easy-menu-define
7260   gnus-article-edit-mode-field-menu gnus-article-edit-mode-map ""
7261   '("Field"
7262     ["Fetch To" message-insert-to t]
7263     ["Fetch Newsgroups" message-insert-newsgroups t]
7264     "----"
7265     ["To" message-goto-to t]
7266     ["From" message-goto-from t]
7267     ["Subject" message-goto-subject t]
7268     ["Cc" message-goto-cc t]
7269     ["Reply-To" message-goto-reply-to t]
7270     ["Summary" message-goto-summary t]
7271     ["Keywords" message-goto-keywords t]
7272     ["Newsgroups" message-goto-newsgroups t]
7273     ["Followup-To" message-goto-followup-to t]
7274     ["Mail-Followup-To" message-goto-mail-followup-to t]
7275     ["Distribution" message-goto-distribution t]
7276     ["Body" message-goto-body t]
7277     ["Signature" message-goto-signature t]))
7278
7279 (define-derived-mode gnus-article-edit-mode message-mode "Article Edit"
7280   "Major mode for editing articles.
7281 This is an extended text-mode.
7282
7283 \\{gnus-article-edit-mode-map}"
7284   (make-local-variable 'gnus-article-edit-done-function)
7285   (make-local-variable 'gnus-prev-winconf)
7286   (set (make-local-variable 'font-lock-defaults)
7287        '(message-font-lock-keywords t))
7288   (set (make-local-variable 'mail-header-separator) "")
7289   (set (make-local-variable 'gnus-article-edit-mode) t)
7290   (easy-menu-add message-mode-field-menu message-mode-map)
7291   (mml-mode)
7292   (setq buffer-read-only nil)
7293   (buffer-enable-undo)
7294   (widen))
7295
7296 (defun gnus-article-edit (&optional force)
7297   "Edit the current article.
7298 This will have permanent effect only in mail groups.
7299 If FORCE is non-nil, allow editing of articles even in read-only
7300 groups."
7301   (interactive "P")
7302   (when (and (not force)
7303              (gnus-group-read-only-p))
7304     (error "The current newsgroup does not support article editing"))
7305   (gnus-article-date-original)
7306   (gnus-article-edit-article
7307    'ignore
7308    `(lambda (no-highlight)
7309       'ignore
7310       (gnus-summary-edit-article-done
7311        ,(or (mail-header-references gnus-current-headers) "")
7312        ,(gnus-group-read-only-p) ,gnus-summary-buffer no-highlight))))
7313
7314 (defun gnus-article-edit-article (start-func exit-func &optional quiet)
7315   "Start editing the contents of the current article buffer."
7316   (let ((winconf (current-window-configuration)))
7317     (set-buffer gnus-article-buffer)
7318     (let ((message-auto-save-directory
7319            ;; Don't associate the article buffer with a draft file.
7320            nil))
7321       (gnus-article-edit-mode))
7322     (funcall start-func)
7323     (set-buffer-modified-p nil)
7324     (gnus-configure-windows 'edit-article)
7325     (setq gnus-article-edit-done-function exit-func)
7326     (setq gnus-prev-winconf winconf)
7327     (unless quiet
7328       (gnus-message 6 "C-c C-c to end edits"))))
7329
7330 (defun gnus-article-edit-done (&optional arg)
7331   "Update the article edits and exit."
7332   (interactive "P")
7333   (let ((func gnus-article-edit-done-function)
7334         (buf (current-buffer))
7335         (start (window-start))
7336         (p (point))
7337         (winconf gnus-prev-winconf))
7338     (widen) ;; Widen it in case that users narrowed the buffer.
7339     (funcall func arg)
7340     (set-buffer buf)
7341     ;; The cache and backlog have to be flushed somewhat.
7342     (when gnus-keep-backlog
7343       (gnus-backlog-remove-article
7344        (car gnus-article-current) (cdr gnus-article-current)))
7345     ;; Flush original article as well.
7346     (gnus-flush-original-article-buffer)
7347     (when gnus-use-cache
7348       (gnus-cache-update-article
7349        (car gnus-article-current) (cdr gnus-article-current)))
7350     ;; We remove all text props from the article buffer.
7351     (kill-all-local-variables)
7352     (set-text-properties (point-min) (point-max) nil)
7353     (gnus-article-mode)
7354     (set-window-configuration winconf)
7355     (set-buffer buf)
7356     (set-window-start (get-buffer-window buf) start)
7357     (set-window-point (get-buffer-window buf) (point)))
7358   (gnus-summary-show-article))
7359
7360 (defun gnus-flush-original-article-buffer ()
7361   (when (get-buffer gnus-original-article-buffer)
7362     (with-current-buffer gnus-original-article-buffer
7363       (setq gnus-original-article nil))))
7364
7365 (defun gnus-article-edit-exit ()
7366   "Exit the article editing without updating."
7367   (interactive)
7368   (when (or (not (buffer-modified-p))
7369             (yes-or-no-p "Article modified; kill anyway? "))
7370     (let ((curbuf (current-buffer))
7371           (p (point))
7372           (window-start (window-start)))
7373       (erase-buffer)
7374       (if (gnus-buffer-live-p gnus-original-article-buffer)
7375           (insert-buffer-substring gnus-original-article-buffer))
7376       (let ((winconf gnus-prev-winconf))
7377         (kill-all-local-variables)
7378         (gnus-article-mode)
7379         (set-window-configuration winconf)
7380         ;; Tippy-toe some to make sure that point remains where it was.
7381         (save-current-buffer
7382           (set-buffer curbuf)
7383           (set-window-start (get-buffer-window (current-buffer)) window-start)
7384           (goto-char p))))
7385     (gnus-summary-show-article)))
7386
7387 (defun gnus-article-edit-full-stops ()
7388   "Interactively repair spacing at end of sentences."
7389   (interactive)
7390   (save-excursion
7391     (goto-char (point-min))
7392     (search-forward-regexp "^$" nil t)
7393     (let ((case-fold-search nil))
7394       (query-replace-regexp "\\([.!?][])}]* \\)\\([[({A-Z]\\)" "\\1 \\2"))))
7395
7396 ;;;
7397 ;;; Article highlights
7398 ;;;
7399
7400 ;; Written by Per Abrahamsen <abraham@iesd.auc.dk>.
7401
7402 ;;; Internal Variables:
7403
7404 (defcustom gnus-button-url-regexp
7405   (concat
7406    "\\b\\(\\(www\\.\\|\\(s?https?\\|ftp\\|file\\|gopher\\|"
7407    "nntp\\|news\\|telnet\\|wais\\|mailto\\|info\\):\\)"
7408    "\\(//[-a-z0-9_.]+:[0-9]*\\)?"
7409    (if (string-match "[[:digit:]]" "1") ;; Support POSIX?
7410        (let ((chars "-a-z0-9_=#$@~%&*+\\/[:word:]")
7411              (punct "!?:;.,"))
7412          (concat
7413           "\\(?:"
7414           ;; Match paired parentheses, e.g. in Wikipedia URLs:
7415           ;; http://thread.gmane.org/47B4E3B2.3050402@gmail.com
7416           "[" chars punct "]+" "(" "[" chars punct "]+" "[" chars "]*)"
7417           "\\(?:" "[" chars punct "]+" "[" chars "]" "\\)?"
7418           "\\|"
7419           "[" chars punct "]+" "[" chars "]"
7420           "\\)"))
7421      (concat ;; XEmacs 21.4 doesn't support POSIX.
7422       "\\([-a-z0-9_=!?#$@~%&*+\\/:;.,]\\|\\w\\)+"
7423       "\\([-a-z0-9_=#$@~%&*+\\/]\\|\\w\\)"))
7424    "\\)")
7425   "Regular expression that matches URLs."
7426   :version "24.4"
7427   :group 'gnus-article-buttons
7428   :type 'regexp)
7429
7430 (defcustom gnus-button-valid-fqdn-regexp
7431   message-valid-fqdn-regexp
7432   "Regular expression that matches a valid FQDN."
7433   :version "22.1"
7434   :group 'gnus-article-buttons
7435   :type 'regexp)
7436
7437 ;; Regexp suggested by Felix Wiemann in <87oeuomcz9.fsf@news2.ososo.de>
7438 (defcustom gnus-button-valid-localpart-regexp
7439   "[a-z0-9$%(*-=?[_][^<>\")!;:,{}\n\t @]*"
7440   "Regular expression that matches a localpart of mail addresses or MIDs."
7441   :version "22.1"
7442   :group 'gnus-article-buttons
7443   :type 'regexp)
7444
7445 (defcustom gnus-button-man-handler 'manual-entry
7446   "Function to use for displaying man pages.
7447 The function must take at least one argument with a string naming the
7448 man page."
7449   :version "22.1"
7450   :type '(choice (function-item :tag "Man" manual-entry)
7451                  (function-item :tag "Woman" woman)
7452                  (function :tag "Other"))
7453   :group 'gnus-article-buttons)
7454
7455 (defcustom gnus-button-mid-or-mail-regexp
7456   (concat "\\b\\(<?" gnus-button-valid-localpart-regexp "@"
7457           gnus-button-valid-fqdn-regexp
7458           ">?\\)\\b")
7459   "Regular expression that matches a message ID or a mail address."
7460   :version "22.1"
7461   :group 'gnus-article-buttons
7462   :type 'regexp)
7463
7464 (defcustom gnus-button-prefer-mid-or-mail 'gnus-button-mid-or-mail-heuristic
7465   "What to do when the button on a string as \"foo123@bar.invalid\" is pushed.
7466 Strings like this can be either a message ID or a mail address.  If it is one
7467 of the symbols `mid' or `mail', Gnus will always assume that the string is a
7468 message ID or a mail address, respectively.  If this variable is set to the
7469 symbol `ask', always query the user what do do.  If it is a function, this
7470 function will be called with the string as its only argument.  The function
7471 must return `mid', `mail', `invalid' or `ask'."
7472   :version "22.1"
7473   :group 'gnus-article-buttons
7474   :type '(choice (function-item :tag "Heuristic function"
7475                                 gnus-button-mid-or-mail-heuristic)
7476                  (const ask)
7477                  (const mid)
7478                  (const mail)))
7479
7480 (defcustom gnus-button-mid-or-mail-heuristic-alist
7481   '((-10.0 . ".+\\$.+@")
7482     (-10.0 . "#")
7483     (-10.0 . "\\*")
7484     (-5.0  . "\\+[^+]*\\+.*@") ;; # two plus signs
7485     (-5.0  . "@[Nn][Ee][Ww][Ss]") ;; /\@news/i
7486     (-5.0  . "@.*[Dd][Ii][Aa][Ll][Uu][Pp]") ;; /\@.*dialup/i;
7487     (-1.0  . "^[^a-z]+@")
7488     ;;
7489     (-5.0  . "\\.[0-9][0-9]+.*@") ;; "\.[0-9]{2,}.*\@"
7490     (-5.0  . "[a-z].*[A-Z].*[a-z].*[A-Z].*@") ;; "([a-z].*[A-Z].*){2,}\@"
7491     (-3.0  . "[A-Z][A-Z][a-z][a-z].*@")
7492     (-5.0  . "\\...?.?@") ;; (-5.0 . "\..{1,3}\@")
7493     ;;
7494     (-2.0  . "^[0-9]")
7495     (-1.0  . "^[0-9][0-9]")
7496     ;;
7497     ;; -3.0 /^[0-9][0-9a-fA-F]{2,2}/;
7498     (-3.0  . "^[0-9][0-9a-fA-F][0-9a-fA-F][^0-9a-fA-F]")
7499     ;; -5.0 /^[0-9][0-9a-fA-F]{3,3}/;
7500     (-5.0  . "^[0-9][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][^0-9a-fA-F]")
7501     ;;
7502     (-3.0  .  "[0-9][0-9][0-9][0-9][0-9][^0-9].*@") ;; "[0-9]{5,}.*\@"
7503     (-3.0  .  "[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][^0-9].*@")
7504     ;;       "[0-9]{8,}.*\@"
7505     (-3.0
7506      . "[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9].*@")
7507     ;; "[0-9]{12,}.*\@"
7508     ;; compensation for TDMA dated mail addresses:
7509     (25.0  . "-dated-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]+.*@")
7510     ;;
7511     (-20.0 . "\\.fsf@") ;; Gnus
7512     (-20.0 . "^slrn")
7513     (-20.0 . "^Pine")
7514     (-20.0 . "^alpine\\.")
7515     (-20.0 . "_-_") ;; Subject change in thread
7516     ;;
7517     (-20.0 . "\\.ln@") ;; leafnode
7518     (-30.0 . "@ID-[0-9]+\\.[a-zA-Z]+\\.dfncis\\.de")
7519     (-30.0 . "@4[Aa][Xx]\\.com") ;; Forte Agent
7520     ;;
7521     ;; (5.0 . "") ;; $local_part_len <= 7
7522     (10.0  . "^[^0-9]+@")
7523     (3.0   . "^[^0-9]+[0-9][0-9]?[0-9]?@")
7524     ;;      ^[^0-9]+[0-9]{1,3}\@ digits only at end of local part
7525     (3.0   . "\@stud")
7526     ;;
7527     (2.0   . "[a-z][a-z][._-][A-Z][a-z].*@")
7528     ;;
7529     (0.5   . "^[A-Z][a-z]")
7530     (0.5   . "^[A-Z][a-z][a-z]")
7531     (1.5   . "^[A-Z][a-z][A-Z][a-z][^a-z]") ;; ^[A-Z][a-z]{3,3}
7532     (2.0   . "^[A-Z][a-z][A-Z][a-z][a-z][^a-z]")) ;; ^[A-Z][a-z]{4,4}
7533   "An alist of \(RATE . REGEXP\) pairs for `gnus-button-mid-or-mail-heuristic'.
7534
7535 A negative RATE indicates a message IDs, whereas a positive indicates a mail
7536 address.  The REGEXP is processed with `case-fold-search' set to nil."
7537   :version "22.1"
7538   :group 'gnus-article-buttons
7539   :type '(repeat (cons (number :tag "Rate")
7540                        (regexp :tag "Regexp"))))
7541
7542 (defun gnus-button-mid-or-mail-heuristic (mid-or-mail)
7543   "Guess whether MID-OR-MAIL is a message ID or a mail address.
7544 Returns `mid' if MID-OR-MAIL is a message IDs, `mail' if it's a mail
7545 address, `ask' if unsure and `invalid' if the string is invalid."
7546   (let ((case-fold-search nil)
7547         (list gnus-button-mid-or-mail-heuristic-alist)
7548         (result 0) rate regexp lpartlen elem)
7549     (setq lpartlen
7550           (length (gnus-replace-in-string mid-or-mail "^\\(.*\\)@.*$" "\\1")))
7551     (gnus-message 8 "`%s', length of local part=`%s'." mid-or-mail lpartlen)
7552     ;; Certain special cases...
7553     (when (string-match
7554            (concat
7555             "^0[0-9]+-[0-9][0-9][0-9][0-9]@t-online\\.de$\\|"
7556             "^[0-9]+\\.[0-9]+@compuserve\\|"
7557             "@public\\.gmane\\.org")
7558            mid-or-mail)
7559       (gnus-message 8 "`%s' is a known mail address." mid-or-mail)
7560       (setq result 'mail))
7561     (when (string-match "@.*@\\| " mid-or-mail)
7562       (gnus-message 8 "`%s' is invalid." mid-or-mail)
7563       (setq result 'invalid))
7564     ;; Nothing more to do, if result is not a number here...
7565     (when (numberp result)
7566       (while list
7567         (setq elem (car list)
7568               rate (car elem)
7569               regexp (cdr elem)
7570               list (cdr list))
7571         (when (string-match regexp mid-or-mail)
7572           (setq result (+ result rate))
7573           (gnus-message
7574            9 "`%s' matched `%s', rate `%s', result `%s'."
7575            mid-or-mail regexp rate result)))
7576       (when (<= lpartlen 7)
7577         (setq result (+ result 5.0))
7578         (gnus-message 9 "`%s' matched (<= lpartlen 7), result `%s'."
7579                       mid-or-mail result))
7580       (when (>= lpartlen 12)
7581         (gnus-message 9 "`%s' matched (>= lpartlen 12)" mid-or-mail)
7582         (cond
7583          ((string-match "[0-9][^0-9]+[0-9].*@" mid-or-mail)
7584           ;; Long local part should contain realname if e-mail address,
7585           ;; too many digits: message-id.
7586           ;; $score -= 5.0 + 0.1 * $local_part_len;
7587           (setq rate (* -1.0 (+ 5.0 (* 0.1 lpartlen))))
7588           (setq result (+ result rate))
7589           (gnus-message
7590            9 "Many digits in `%s', rate `%s', result `%s'."
7591            mid-or-mail rate result))
7592          ((string-match "[^aeiouy][^aeiouy][^aeiouy][^aeiouy]+.*\@"
7593                         mid-or-mail)
7594           ;; Too few vowels [^aeiouy]{4,}.*\@
7595           (setq result (+ result -5.0))
7596           (gnus-message
7597            9 "Few vowels in `%s', rate `%s', result `%s'."
7598            mid-or-mail -5.0 result))
7599          (t
7600           (setq result (+ result 5.0))
7601           (gnus-message
7602            9 "`%s', rate `%s', result `%s'." mid-or-mail 5.0 result)))))
7603     (gnus-message 8 "`%s': Final rate is `%s'." mid-or-mail result)
7604     ;; Maybe we should make this a customizable alist: (condition . 'result)
7605     (cond
7606      ((symbolp result) result)
7607      ;; Now convert number into proper results:
7608      ((< result -10.0) 'mid)
7609      ((> result  10.0) 'mail)
7610      (t 'ask))))
7611
7612 (defun gnus-button-handle-mid-or-mail (mid-or-mail)
7613   (let* ((pref gnus-button-prefer-mid-or-mail) guessed
7614          (url-mid (concat "news" ":" mid-or-mail))
7615          (url-mailto (concat "mailto" ":" mid-or-mail)))
7616     (gnus-message 9 "mid-or-mail=%s" mid-or-mail)
7617     (when (fboundp pref)
7618       (setq guessed
7619             ;; get rid of surrounding angles...
7620             (funcall pref
7621                      (gnus-replace-in-string mid-or-mail "^<\\|>$" "")))
7622       (if (or (eq 'mid guessed) (eq 'mail guessed))
7623           (setq pref guessed)
7624         (setq pref 'ask)))
7625     (if (eq pref 'ask)
7626         (save-window-excursion
7627           (if (y-or-n-p (concat "Is <" mid-or-mail "> a mail address? "))
7628               (setq pref 'mail)
7629             (setq pref 'mid))))
7630     (cond ((eq pref 'mid)
7631            (gnus-message 8 "calling `gnus-button-handle-news' %s" url-mid)
7632            (gnus-button-handle-news url-mid))
7633           ((eq pref 'mail)
7634            (gnus-message 8 "calling `gnus-url-mailto'  %s" url-mailto)
7635            (gnus-url-mailto url-mailto))
7636           (t (gnus-message 3 "Invalid string.")))))
7637
7638 (defun gnus-button-handle-custom (fun arg)
7639   "Call function FUN on argument ARG.
7640 Both FUN and ARG are supposed to be strings.  ARG will be passed
7641 as a symbol to FUN."
7642   (funcall (intern fun)
7643            (if (string-match "^customize-apropos" fun)
7644                arg
7645              (intern arg))))
7646
7647 (defvar gnus-button-handle-describe-prefix "^\\(C-h\\|<?[Ff]1>?\\)")
7648
7649 (defun gnus-button-handle-describe-function (url)
7650   "Call `describe-function' when pushing the corresponding URL button."
7651   (describe-function
7652    (intern
7653     (gnus-replace-in-string url gnus-button-handle-describe-prefix ""))))
7654
7655 (defun gnus-button-handle-describe-variable (url)
7656   "Call `describe-variable' when pushing the corresponding URL button."
7657   (describe-variable
7658    (intern
7659     (gnus-replace-in-string url gnus-button-handle-describe-prefix ""))))
7660
7661 (defun gnus-button-handle-symbol (url)
7662 "Display help on variable or function.
7663 Calls `describe-variable' or `describe-function'."
7664   (let ((sym (intern url)))
7665     (cond
7666      ((fboundp sym) (describe-function sym))
7667      ((boundp sym) (describe-variable sym))
7668      (t (gnus-message 3 "`%s' is not a known function of variable." url)))))
7669
7670 (defun gnus-button-handle-describe-key (url)
7671   "Call `describe-key' when pushing the corresponding URL button."
7672   (let* ((key-string
7673           (gnus-replace-in-string url gnus-button-handle-describe-prefix ""))
7674          (keys (ignore-errors (eval `(kbd ,key-string)))))
7675     (if keys
7676         (describe-key keys)
7677       (gnus-message 3 "Invalid key sequence in button: %s" key-string))))
7678
7679 (defun gnus-button-handle-apropos (url)
7680   "Call `apropos' when pushing the corresponding URL button."
7681   (apropos (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
7682
7683 (defun gnus-button-handle-apropos-command (url)
7684   "Call `apropos' when pushing the corresponding URL button."
7685   (apropos-command
7686    (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
7687
7688 (defun gnus-button-handle-apropos-variable (url)
7689   "Call `apropos' when pushing the corresponding URL button."
7690   (funcall
7691    (if (fboundp 'apropos-variable) 'apropos-variable 'apropos)
7692    (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
7693
7694 (defun gnus-button-handle-apropos-documentation (url)
7695   "Call `apropos' when pushing the corresponding URL button."
7696   (funcall
7697    (if (fboundp 'apropos-documentation) 'apropos-documentation 'apropos)
7698    (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
7699
7700 (defun gnus-button-handle-library (url)
7701   "Call `locate-library' when pushing the corresponding URL button."
7702   (gnus-message 9 "url=`%s'" url)
7703   (let* ((lib (locate-library url))
7704          (file (gnus-replace-in-string (or lib "") "\.elc" ".el")))
7705     (if (not lib)
7706         (gnus-message 1 "Cannot locale library `%s'." url)
7707       (find-file-read-only file))))
7708
7709 (defcustom gnus-button-man-level 5
7710   "*Integer that says how many man-related buttons Gnus will show.
7711 The higher the number, the more buttons will appear and the more false
7712 positives are possible.  Note that you can set this variable local to
7713 specific groups.  Setting it higher in Unix groups is probably a good idea.
7714 See Info node `(gnus)Group Parameters' and the variable `gnus-parameters' on
7715 how to set variables in specific groups."
7716   :version "22.1"
7717   :group 'gnus-article-buttons
7718   :link '(custom-manual "(gnus)Group Parameters")
7719   :type 'integer)
7720
7721 (defcustom gnus-button-emacs-level 5
7722   "*Integer that says how many emacs-related buttons Gnus will show.
7723 The higher the number, the more buttons will appear and the more false
7724 positives are possible.  Note that you can set this variable local to
7725 specific groups.  Setting it higher in Emacs or Gnus related groups is
7726 probably a good idea.  See Info node `(gnus)Group Parameters' and the variable
7727 `gnus-parameters' on how to set variables in specific groups."
7728   :version "22.1"
7729   :group 'gnus-article-buttons
7730   :link '(custom-manual "(gnus)Group Parameters")
7731   :type 'integer)
7732
7733 (defcustom gnus-button-message-level 5
7734   "*Integer that says how many buttons for news or mail messages will appear.
7735 The higher the number, the more buttons will appear and the more false
7736 positives are possible."
7737   ;; mail addresses, MIDs, URLs for news, ...
7738   :version "22.1"
7739   :group 'gnus-article-buttons
7740   :type 'integer)
7741
7742 (defcustom gnus-button-browse-level 5
7743   "*Integer that says how many buttons for browsing will appear.
7744 The higher the number, the more buttons will appear and the more false
7745 positives are possible."
7746   ;; stuff handled by `browse-url' or `gnus-button-embedded-url'
7747   :version "22.1"
7748   :group 'gnus-article-buttons
7749   :type 'integer)
7750
7751 (defcustom gnus-button-alist
7752   '(("<\\(url:[>\n\t ]*?\\)?\\(nntp\\|news\\):[>\n\t ]*\\([^>\n\t ]*@[^>\n\t ]*\\)>"
7753      0 (>= gnus-button-message-level 0) gnus-button-handle-news 3)
7754     ((concat "\\b\\(nntp\\|news\\):\\("
7755              gnus-button-valid-localpart-regexp "@[a-z0-9.-]+[a-z]\\)")
7756      0 t gnus-button-handle-news 2)
7757     ("\\(\\b<\\(url:[>\n\t ]*\\)?\\(nntp\\|news\\):[>\n\t ]*\\(//\\)?\\([^>\n\t ]*\\)>\\)"
7758      1 (>= gnus-button-message-level 0) gnus-button-fetch-group 5)
7759     ("\\b\\(nntp\\|news\\):\\(//\\)?\\([^'\">\n\t ]+\\)"
7760      0 (>= gnus-button-message-level 0) gnus-button-fetch-group 3)
7761     ;; RFC 2392 (Don't allow `/' in domain part --> CID)
7762     ("\\bmid:\\(//\\)?\\([^'\">\n\t ]+@[^'\">\n\t /]+\\)"
7763      0 (>= gnus-button-message-level 0) gnus-button-message-id 2)
7764     ("\\bin\\( +article\\| +message\\)? +\\(<\\([^\n @<>]+@[^\n @<>]+\\)>\\)"
7765      2 (>= gnus-button-message-level 0) gnus-button-message-id 3)
7766     ("\\b\\(mid\\|message-id\\):? +\\(<\\([^\n @<>]+@[^\n @<>]+\\)>\\)"
7767      2 (>= gnus-button-message-level 0) gnus-button-message-id 3)
7768     ("\\(<URL: *\\)mailto: *\\([^> \n\t]+\\)>"
7769      0 (>= gnus-button-message-level 0) gnus-url-mailto 2)
7770     ;; RFC 2368 (The mailto URL scheme)
7771     ("\\bmailto:\\([-a-z.@_+0-9%=?&/]+\\)"
7772      0 (>= gnus-button-message-level 0) gnus-url-mailto 1)
7773     ("\\bmailto:\\([^ \n\t]+\\)"
7774      0 (>= gnus-button-message-level 0) gnus-url-mailto 1)
7775     ;; Info Konqueror style <info:/foo/bar baz>.
7776     ;; Must come before " Gnus home-grown style".
7777     ("\\binfo://?\\([^'\">\n\t]+\\)"
7778      0 (>= gnus-button-emacs-level 1) gnus-button-handle-info-url 1)
7779    ;; Info, Gnus home-grown style (deprecated) <info://foo/bar+baz>
7780     ("\\binfo://\\([^'\">\n\t ]+\\)"
7781      0 (>= gnus-button-emacs-level 1) gnus-button-handle-info-url 1)
7782     ;; Info GNOME style <info:foo#bar_baz>
7783     ("\\binfo:\\([^('\n\t\r \"><][^'\n\t\r \"><]*\\)"
7784      0 (>= gnus-button-emacs-level 1) gnus-button-handle-info-url-gnome 1)
7785     ;; Info KDE style <info:(foo)bar baz>
7786     ("<\\(info:\\(([^)]+)[^>\n\r]*\\)\\)>"
7787      1 (>= gnus-button-emacs-level 1) gnus-button-handle-info-url-kde 2)
7788     ("\\((Info-goto-node\\|(info\\)[ \t\n]*\\(\"[^\"]*\"\\))" 0
7789      (>= gnus-button-emacs-level 1) gnus-button-handle-info-url 2)
7790     ("\\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,]*\\)\\)?"
7791      ;; Info links like `C-h i d m Gnus RET' or `C-h i d m Gnus RET i partial RET'
7792      0 (>= gnus-button-emacs-level 1) gnus-button-handle-info-keystrokes 0)
7793     ;; This is custom
7794     ("M-x[ \t\n]\\(customize-[^ ]+\\)[ \t\n]RET[ \t\n]\\([^ ]+\\)[ \t\n]RET\\>" 0
7795      (>= gnus-button-emacs-level 1) gnus-button-handle-custom 1 2)
7796     ;; Emacs help commands
7797     ("M-x[ \t\n]+apropos[ \t\n]+RET[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET\\>"
7798      ;; regexp doesn't match arguments containing ` '.
7799      0 (>= gnus-button-emacs-level 1) gnus-button-handle-apropos 1)
7800     ("M-x[ \t\n]+apropos-command[ \t\n]+RET[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET\\>"
7801      0 (>= gnus-button-emacs-level 1) gnus-button-handle-apropos-command 1)
7802     ("M-x[ \t\n]+apropos-variable[ \t\n]+RET[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET\\>"
7803      0 (>= gnus-button-emacs-level 1) gnus-button-handle-apropos-variable 1)
7804     ("M-x[ \t\n]+apropos-documentation[ \t\n]+RET[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET\\>"
7805      0 (>= gnus-button-emacs-level 1) gnus-button-handle-apropos-documentation 1)
7806     ;; The following entries may lead to many false positives so don't enable
7807     ;; them by default (use a high button level).
7808     ("/\\([a-z][-a-z0-9]+\\.el\\)\\>[^.?]"
7809      ;; Exclude [.?] for URLs in gmane.emacs.cvs
7810      1 (>= gnus-button-emacs-level 8) gnus-button-handle-library 1)
7811     ("`\\([a-z][-a-z0-9]+\\.el\\)'"
7812      1 (>= gnus-button-emacs-level 8) gnus-button-handle-library 1)
7813     ("`\\([a-z][a-z0-9]+-[a-z0-9]+-[-a-z0-9]*[a-z]\\|\\(gnus\\|message\\)-[-a-z]+\\)'"
7814      0 (>= gnus-button-emacs-level 8) gnus-button-handle-symbol 1)
7815     ("`\\([a-z][a-z0-9]+-[a-z]+\\)'"
7816      0 (>= gnus-button-emacs-level 9) gnus-button-handle-symbol 1)
7817     ("(setq[ \t\n]+\\([a-z][a-z0-9]+-[-a-z0-9]+\\)[ \t\n]+.+)"
7818      1 (>= gnus-button-emacs-level 7) gnus-button-handle-describe-variable 1)
7819     ("\\bM-x[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET\\>"
7820      1 (>= gnus-button-emacs-level 7) gnus-button-handle-describe-function 1)
7821     ("\\b\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+f[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET\\>"
7822      0 (>= gnus-button-emacs-level 1) gnus-button-handle-describe-function 2)
7823     ("\\b\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+v[ \t\n]+\\([^ \t\n]+\\)[ \t\n]+RET\\>"
7824      0 (>= gnus-button-emacs-level 1) gnus-button-handle-describe-variable 2)
7825     ("`\\(\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+k[ \t\n]+\\([^']+\\)\\)'"
7826      ;; Unlike the other regexps we really have to require quoting
7827      ;; here to determine where it ends.
7828      1 (>= gnus-button-emacs-level 1) gnus-button-handle-describe-key 3)
7829     ;; This is how URLs _should_ be embedded in text (RFC 1738, RFC 2396)...
7830     ("<URL: *\\([^\n<>]*\\)>"
7831      1 (>= gnus-button-browse-level 0) gnus-button-embedded-url 1)
7832     ;; RFC 2396 (2.4.3., delims) ...
7833     ("\"URL: *\\([^\n\"]*\\)\""
7834      1 (>= gnus-button-browse-level 0) gnus-button-embedded-url 1)
7835     ;; Raw URLs.
7836     (gnus-button-url-regexp
7837      0 (>= gnus-button-browse-level 0) browse-url 0)
7838     ;; man pages
7839     ("\\b\\([a-z][a-z]+([1-9])\\)\\W"
7840      0 (and (>= gnus-button-man-level 1) (< gnus-button-man-level 3))
7841      gnus-button-handle-man 1)
7842     ;; more man pages: resolv.conf(5), iso_8859-1(7), xterm(1x)
7843     ("\\b\\([a-z][-_.a-z0-9]+([1-9])\\)\\W"
7844      0 (and (>= gnus-button-man-level 3) (< gnus-button-man-level 5))
7845      gnus-button-handle-man 1)
7846     ;; even more: Apache::PerlRun(3pm), PDL::IO::FastRaw(3pm),
7847     ;; SoWWWAnchor(3iv), XSelectInput(3X11), X(1), X(7)
7848     ("\\b\\(\\(?:[a-z][-+_.:a-z0-9]+([1-9][X1a-z]*)\\)\\|\\b\\(?:X([1-9])\\)\\)\\W"
7849      0 (>= gnus-button-man-level 5) gnus-button-handle-man 1)
7850     ;; Recognizing patches to .el files.  This is somewhat obscure,
7851     ;; but considering the percentage of Gnus users who hack Emacs
7852     ;; Lisp files...
7853     ("^--- \\([^ .]+\\.el\\).*\n.*\n@@ -?\\([0-9]+\\)" 1
7854      (>= gnus-button-message-level 4) gnus-button-patch 1 2)
7855     ("^\\*\\*\\* \\([^ .]+\\.el\\).*\n.*\n\\*+\n\\*\\*\\* \\([0-9]+\\)" 1
7856      (>= gnus-button-message-level 4) gnus-button-patch 1 2)
7857     ;; MID or mail: To avoid too many false positives we don't try to catch
7858     ;; all kind of allowed MIDs or mail addresses.  Domain part must contain
7859     ;; at least one dot.  TLD must contain two or three chars or be a know TLD
7860     ;; (info|name|...).  Put this entry near the _end_ of `gnus-button-alist'
7861     ;; so that non-ambiguous entries (see above) match first.
7862     (gnus-button-mid-or-mail-regexp
7863      0 (>= gnus-button-message-level 5) gnus-button-handle-mid-or-mail 1))
7864   "*Alist of regexps matching buttons in article bodies.
7865
7866 Each entry has the form (REGEXP BUTTON FORM CALLBACK PAR...), where
7867 REGEXP: is the string (case insensitive) matching text around the button (can
7868 also be Lisp expression evaluating to a string),
7869 BUTTON: is the number of the regexp grouping actually matching the button,
7870 FORM: is a Lisp expression which must eval to true for the button to
7871 be added,
7872 CALLBACK: is the function to call when the user push this button, and each
7873 PAR: is a number of a regexp grouping whose text will be passed to CALLBACK.
7874
7875 CALLBACK can also be a variable, in that case the value of that
7876 variable it the real callback function."
7877   :group 'gnus-article-buttons
7878   :type '(repeat (list (choice regexp variable sexp)
7879                        (integer :tag "Button")
7880                        (sexp :tag "Form")
7881                        (function :tag "Callback")
7882                        (repeat :tag "Par"
7883                                :inline t
7884                                (integer :tag "Regexp group")))))
7885 (put 'gnus-button-alist 'risky-local-variable t)
7886
7887 (defcustom gnus-header-button-alist
7888   '(("^\\(References\\|Message-I[Dd]\\|^In-Reply-To\\):" "<[^<>]+>"
7889      0 (>= gnus-button-message-level 0) gnus-button-message-id 0)
7890     ("^\\(From\\|Reply-To\\):" ": *\\(.+\\)$"
7891      1 (>= gnus-button-message-level 0) gnus-button-reply 1)
7892     ("^\\(Cc\\|To\\):" "[^ \t\n<>,()\"]+@[^ \t\n<>,()\"]+"
7893      0 (>= gnus-button-message-level 0) gnus-msg-mail 0)
7894     ("^X-[Uu][Rr][Ll]:" gnus-button-url-regexp
7895      0 (>= gnus-button-browse-level 0) browse-url 0)
7896     ("^Subject:" gnus-button-url-regexp
7897      0 (>= gnus-button-browse-level 0) browse-url 0)
7898     ("^[^:]+:" gnus-button-url-regexp
7899      0 (>= gnus-button-browse-level 0) browse-url 0)
7900     ("^OpenPGP:.*url=" gnus-button-url-regexp
7901      0 (>= gnus-button-browse-level 0) gnus-button-openpgp 0)
7902     ("^[^:]+:" "\\bmailto:\\([-a-z.@_+0-9%=?&/]+\\)"
7903      0 (>= gnus-button-message-level 0) gnus-url-mailto 1)
7904     ("^[^:]+:" "\\(<\\(url: \\)?\\(nntp\\|news\\):\\([^>\n ]*\\)>\\)"
7905      1 (>= gnus-button-message-level 0) gnus-button-message-id 4))
7906   "*Alist of headers and regexps to match buttons in article heads.
7907
7908 This alist is very similar to `gnus-button-alist', except that each
7909 alist has an additional HEADER element first in each entry:
7910
7911 \(HEADER REGEXP BUTTON FORM CALLBACK PAR)
7912
7913 HEADER is a regexp to match a header.  For a fuller explanation, see
7914 `gnus-button-alist'."
7915   :group 'gnus-article-buttons
7916   :group 'gnus-article-headers
7917   :type '(repeat (list (regexp :tag "Header")
7918                        (choice regexp variable)
7919                        (integer :tag "Button")
7920                        (sexp :tag "Form")
7921                        (function :tag "Callback")
7922                        (repeat :tag "Par"
7923                                :inline t
7924                                (integer :tag "Regexp group")))))
7925 (put 'gnus-header-button-alist 'risky-local-variable t)
7926
7927 ;;; Commands:
7928
7929 (defun gnus-article-push-button (event)
7930   "Check text under the mouse pointer for a callback function.
7931 If the text under the mouse pointer has a `gnus-callback' property,
7932 call it with the value of the `gnus-data' text property."
7933   (interactive "e")
7934   (set-buffer (window-buffer (posn-window (event-start event))))
7935   (let* ((pos (posn-point (event-start event)))
7936          (data (get-text-property pos 'gnus-data))
7937          (fun (get-text-property pos 'gnus-callback)))
7938     (goto-char pos)
7939     (when fun
7940       (funcall fun data))))
7941
7942 (defun gnus-article-press-button ()
7943   "Check text at point for a callback function.
7944 If the text at point has a `gnus-callback' property,
7945 call it with the value of the `gnus-data' text property."
7946   (interactive)
7947   (let ((data (get-text-property (point) 'gnus-data))
7948         (fun (get-text-property (point) 'gnus-callback)))
7949     (when fun
7950       (funcall fun data))))
7951
7952 (defun gnus-article-highlight (&optional force)
7953   "Highlight current article.
7954 This function calls `gnus-article-highlight-headers',
7955 `gnus-article-highlight-citation',
7956 `gnus-article-highlight-signature', and `gnus-article-add-buttons' to
7957 do the highlighting.  See the documentation for those functions."
7958   (interactive (list 'force))
7959   (gnus-article-highlight-headers)
7960   (gnus-article-highlight-citation force)
7961   (gnus-article-highlight-signature)
7962   (gnus-article-add-buttons)
7963   (gnus-article-add-buttons-to-head))
7964
7965 (defun gnus-article-highlight-some (&optional force)
7966   "Highlight current article.
7967 This function calls `gnus-article-highlight-headers',
7968 `gnus-article-highlight-signature', and `gnus-article-add-buttons' to
7969 do the highlighting.  See the documentation for those functions."
7970   (interactive (list 'force))
7971   (gnus-article-highlight-headers)
7972   (gnus-article-highlight-signature)
7973   (gnus-article-add-buttons))
7974
7975 (defun gnus-article-highlight-headers ()
7976   "Highlight article headers as specified by `gnus-header-face-alist'."
7977   (interactive)
7978   (gnus-with-article-headers
7979     (let (regexp header-face field-face from hpoints fpoints)
7980       (dolist (entry gnus-header-face-alist)
7981         (goto-char (point-min))
7982         (setq regexp (concat "^\\("
7983                              (if (string-equal "" (nth 0 entry))
7984                                  "[^\t ]"
7985                                (nth 0 entry))
7986                              "\\)")
7987               header-face (nth 1 entry)
7988               field-face (nth 2 entry))
7989         (while (and (re-search-forward regexp nil t)
7990                     (not (eobp)))
7991           (beginning-of-line)
7992           (setq from (point))
7993           (unless (search-forward ":" nil t)
7994             (forward-char 1))
7995           (when (and header-face
7996                      (not (memq (point) hpoints)))
7997             (push (point) hpoints)
7998             (gnus-put-text-property from (point) 'face header-face))
7999           (when (and field-face
8000                      (not (memq (setq from (point)) fpoints)))
8001             (push from fpoints)
8002             (if (re-search-forward "^[^ \t]" nil t)
8003                 (forward-char -2)
8004               (goto-char (point-max)))
8005             (gnus-put-text-property from (point) 'face field-face)))))))
8006
8007 (defun gnus-article-highlight-signature ()
8008   "Highlight the signature in an article.
8009 It does this by highlighting everything after
8010 `gnus-signature-separator' using the face `gnus-signature'."
8011   (interactive)
8012   (gnus-with-article-buffer
8013     (let ((inhibit-point-motion-hooks t))
8014       (save-restriction
8015         (when (and gnus-signature-face
8016                    (gnus-article-narrow-to-signature))
8017           (gnus-overlay-put (gnus-make-overlay (point-min) (point-max) nil t)
8018                             'face gnus-signature-face)
8019           (widen)
8020           (gnus-article-search-signature)
8021           (let ((start (match-beginning 0))
8022                 (end (set-marker (make-marker) (1+ (match-end 0)))))
8023             (gnus-article-add-button start (1- end) 'gnus-signature-toggle
8024                                      end)))))))
8025
8026 (defun gnus-button-in-region-p (b e prop)
8027   "Say whether PROP exists in the region."
8028   (text-property-not-all b e prop nil))
8029
8030 (defun gnus-article-add-buttons ()
8031   "Find external references in the article and make buttons of them.
8032 \"External references\" are things like Message-IDs and URLs, as
8033 specified by `gnus-button-alist'."
8034   (interactive)
8035   (gnus-with-article-buffer
8036     (let ((inhibit-point-motion-hooks t)
8037           (case-fold-search t)
8038           (alist gnus-button-alist)
8039           beg entry regexp)
8040       ;; We skip the headers.
8041       (article-goto-body)
8042       (setq beg (point))
8043       (while (setq entry (pop alist))
8044         (setq regexp (eval (car entry)))
8045         (goto-char beg)
8046         (while (re-search-forward regexp nil t)
8047           (let ((start (match-beginning (nth 1 entry)))
8048                 (end (match-end (nth 1 entry)))
8049                 (from (match-beginning 0)))
8050             (when (and (eval (nth 2 entry))
8051                        (not (gnus-button-in-region-p
8052                              start end 'gnus-callback)))
8053               ;; That optional form returned non-nil, so we add the
8054               ;; button.
8055               (setq from (set-marker (make-marker) from))
8056               (unless (and (eq (car entry) 'gnus-button-url-regexp)
8057                            (gnus-article-extend-url-button from start end))
8058                 (gnus-article-add-button start end
8059                                          'gnus-button-push (list from entry))
8060                 (gnus-put-text-property
8061                  start end
8062                  'gnus-string (buffer-substring-no-properties
8063                                start end))))))))))
8064
8065 (defun gnus-article-extend-url-button (beg start end)
8066   "Extend url button if url is folded into two or more lines.
8067 Return non-nil if button is extended.  BEG is a marker that points to
8068 the beginning position of a text containing url.  START and END are
8069 the endpoints of a url button before it is extended.  The concatenated
8070 url is put as the `gnus-button-url' overlay property on the button."
8071   (let ((opoint (point))
8072         (points (list start end))
8073         url delim regexp)
8074     (prog1
8075         (when (and (progn
8076                      (goto-char end)
8077                      (not (looking-at "[\t ]*[\">]")))
8078                    (progn
8079                      (goto-char start)
8080                      (string-match
8081                       "\\(?:\"\\|\\(<\\)\\)[\t ]*\\(?:url[\t ]*:[\t ]*\\)?\\'"
8082                       (buffer-substring (point-at-bol) start)))
8083                    (progn
8084                      (setq url (list (buffer-substring start end))
8085                            delim (if (match-beginning 1) ">" "\""))
8086                      (beginning-of-line)
8087                      (setq regexp (concat
8088                                    (when (and (looking-at
8089                                                message-cite-prefix-regexp)
8090                                               (< (match-end 0) start))
8091                                      (regexp-quote (match-string 0)))
8092                                    "\
8093 \[\t ]*\\(?:\\([^\t\n \">]+\\)[\t ]*$\\|\\([^\t\n \">]*\\)[\t ]*"
8094                                    delim "\\)"))
8095                      (while (progn
8096                               (forward-line 1)
8097                               (and (looking-at regexp)
8098                                    (prog1
8099                                        (match-beginning 1)
8100                                      (push (or (match-string 2)
8101                                                (match-string 1))
8102                                            url)
8103                                      (push (setq end (or (match-end 2)
8104                                                          (match-end 1)))
8105                                            points)
8106                                      (push (or (match-beginning 2)
8107                                                (match-beginning 1))
8108                                            points)))))
8109                      (match-beginning 2)))
8110           (let (gnus-article-mouse-face widget-mouse-face)
8111             (while points
8112               (gnus-article-add-button (pop points) (pop points)
8113                                        'gnus-button-push
8114                                        (list beg (assq 'gnus-button-url-regexp
8115                                                        gnus-button-alist)))))
8116           (let ((overlay (gnus-make-overlay start end)))
8117             (gnus-overlay-put overlay 'evaporate t)
8118             (gnus-overlay-put overlay 'gnus-button-url
8119                               (list (mapconcat 'identity (nreverse url) "")))
8120             (when gnus-article-mouse-face
8121               (gnus-overlay-put overlay 'mouse-face gnus-article-mouse-face)))
8122           t)
8123       (goto-char opoint))))
8124
8125 ;; Add buttons to the head of an article.
8126 (defun gnus-article-add-buttons-to-head ()
8127   "Add buttons to the head of the article."
8128   (interactive)
8129   (gnus-with-article-headers
8130     (let (beg end)
8131       (dolist (entry gnus-header-button-alist)
8132         ;; Each alist entry.
8133         (goto-char (point-min))
8134         (while (re-search-forward (car entry) nil t)
8135           ;; Each header matching the entry.
8136           (setq beg (match-beginning 0))
8137           (setq end (or (and (re-search-forward "^[^ \t]" nil t)
8138                              (match-beginning 0))
8139                         (point-max)))
8140           (goto-char beg)
8141           (while (re-search-forward (eval (nth 1 entry)) end t)
8142             ;; Each match within a header.
8143             (let* ((entry (cdr entry))
8144                    (start (match-beginning (nth 1 entry)))
8145                    (end (match-end (nth 1 entry)))
8146                    (form (nth 2 entry)))
8147               (goto-char (match-end 0))
8148               (when (eval form)
8149                 (gnus-article-add-button
8150                  start end (nth 3 entry)
8151                  (buffer-substring (match-beginning (nth 4 entry))
8152                                    (match-end (nth 4 entry)))))))
8153           (goto-char end))))))
8154
8155 ;;; External functions:
8156
8157 (defun gnus-article-add-button (from to fun &optional data text)
8158   "Create a button between FROM and TO with callback FUN and data DATA."
8159   (when gnus-article-button-face
8160     (gnus-overlay-put (gnus-make-overlay from to nil t)
8161                       'face gnus-article-button-face))
8162   (gnus-add-text-properties
8163    from to
8164    (nconc (and gnus-article-mouse-face
8165                (list gnus-mouse-face-prop gnus-article-mouse-face))
8166           (list 'gnus-callback fun)
8167           (and data (list 'gnus-data data))))
8168   (widget-convert-button 'link from to :action 'gnus-widget-press-button
8169                          :help-echo (or text "Follow the link")
8170                          :keymap gnus-url-button-map
8171                          :button-keymap gnus-widget-button-keymap))
8172
8173 (defun gnus-article-copy-string ()
8174   "Copy the string in the button to the kill ring."
8175   (interactive)
8176   (gnus-article-check-buffer)
8177   (let ((data (get-text-property (point) 'gnus-string)))
8178     (when data
8179       (with-temp-buffer
8180         (insert data)
8181         (copy-region-as-kill (point-min) (point-max))
8182         (message "Copied %s" data)))))
8183
8184 ;;; Internal functions:
8185
8186 (defun gnus-article-set-globals ()
8187   (with-current-buffer gnus-summary-buffer
8188     (gnus-set-global-variables)))
8189
8190 (defun gnus-signature-toggle (end)
8191   (gnus-with-article-buffer
8192     (let ((inhibit-point-motion-hooks t))
8193       (if (text-property-any end (point-max) 'article-type 'signature)
8194           (progn
8195             (gnus-delete-wash-type 'signature)
8196             (gnus-remove-text-properties-when
8197              'article-type 'signature end (point-max)
8198              (cons 'article-type (cons 'signature
8199                                        gnus-hidden-properties))))
8200         (gnus-add-wash-type 'signature)
8201         (gnus-add-text-properties-when
8202          'article-type nil end (point-max)
8203          (cons 'article-type (cons 'signature
8204                                    gnus-hidden-properties)))))
8205     (let ((gnus-article-mime-handle-alist-1 gnus-article-mime-handle-alist))
8206       (gnus-set-mode-line 'article))))
8207
8208 (defun gnus-button-push (marker-and-entry)
8209   ;; Push button starting at MARKER.
8210   (save-excursion
8211     (let* ((marker (car marker-and-entry))
8212            (entry (cadr marker-and-entry))
8213            (regexp (car entry))
8214            (inhibit-point-motion-hooks t))
8215       (goto-char marker)
8216       ;; This is obviously true, or something bad is happening :)
8217       ;; But we need it to have the match-data
8218       (when (looking-at (or (if (symbolp regexp)
8219                                 (symbol-value regexp)
8220                               regexp)))
8221         (let ((fun (nth 3 entry))
8222               (args (or (and (eq (car entry) 'gnus-button-url-regexp)
8223                              (get-char-property marker 'gnus-button-url))
8224                         (mapcar (lambda (group)
8225                                   (let ((string (match-string group)))
8226                                     (set-text-properties
8227                                      0 (length string) nil string)
8228                                     string))
8229                                 (nthcdr 4 entry)))))
8230
8231           (cond
8232            ((fboundp fun)
8233             (apply fun args))
8234            ((and (boundp fun)
8235                  (fboundp (symbol-value fun)))
8236             (apply (symbol-value fun) args))
8237            (t
8238             (gnus-message 1 "You must define `%S' to use this button"
8239                           (cons fun args)))))))))
8240
8241 (defun gnus-parse-news-url (url)
8242   (let (scheme server port group message-id articles)
8243     (with-temp-buffer
8244       (insert url)
8245       (goto-char (point-min))
8246       (when (looking-at "\\([A-Za-z]+\\):")
8247         (setq scheme (match-string 1))
8248         (goto-char (match-end 0)))
8249       (when (looking-at "//\\([^:/]+\\)\\(:?\\)\\([0-9]+\\)?/")
8250         (setq server (match-string 1))
8251         (setq port (if (stringp (match-string 3))
8252                        (string-to-number (match-string 3))
8253                      (match-string 3)))
8254         (goto-char (match-end 0)))
8255
8256       (cond
8257        ((looking-at "\\(.*@.*\\)")
8258         (setq message-id (match-string 1)))
8259        ((looking-at "\\([^/]+\\)/\\([-0-9]+\\)")
8260         (setq group (match-string 1)
8261               articles (split-string (match-string 2) "-")))
8262        ((looking-at "\\([^/]+\\)/?")
8263         (setq group (match-string 1)))
8264        (t
8265         (error "Unknown news URL syntax"))))
8266     (list scheme server port group message-id articles)))
8267
8268 (defun gnus-button-handle-news (url)
8269   "Fetch a news URL."
8270   (destructuring-bind (scheme server port group message-id articles)
8271       (gnus-parse-news-url url)
8272     (cond
8273      (message-id
8274       (with-current-buffer gnus-summary-buffer
8275         (if server
8276             (let ((gnus-refer-article-method
8277                    (nconc (list (list 'nntp server))
8278                           gnus-refer-article-method))
8279                   (nntp-port-number (or port "nntp")))
8280               (gnus-message 7 "Fetching %s with %s"
8281                             message-id gnus-refer-article-method)
8282               (gnus-summary-refer-article message-id))
8283           (gnus-summary-refer-article message-id))))
8284      (group
8285       (gnus-button-fetch-group url)))))
8286
8287 (defun gnus-button-patch (library line)
8288   "Visit an Emacs Lisp library LIBRARY on line LINE."
8289   (interactive)
8290   (let ((file (locate-library (file-name-nondirectory library))))
8291     (unless file
8292       (error "Couldn't find library %s" library))
8293     (find-file file)
8294     (goto-char (point-min))
8295     (forward-line (1- (string-to-number line)))))
8296
8297 (defun gnus-button-handle-man (url)
8298   "Fetch a man page."
8299   (gnus-message 9 "`%s' `%s'" gnus-button-man-handler url)
8300   (when (eq gnus-button-man-handler 'woman)
8301     (setq url (gnus-replace-in-string url "([1-9][X1a-z]*).*\\'" "")))
8302   (gnus-message 9 "`%s' `%s'" gnus-button-man-handler url)
8303   (funcall gnus-button-man-handler url))
8304
8305 (defun gnus-button-handle-info-url (url)
8306   "Fetch an info URL."
8307   (setq url (mm-subst-char-in-string ?+ ?\  url))
8308   (cond
8309    ((string-match "^\\([^:/]+\\)?/\\(.*\\)" url)
8310     (gnus-info-find-node
8311      (concat "(" (or (gnus-url-unhex-string (match-string 1 url))
8312                      "Gnus")
8313              ")" (gnus-url-unhex-string (match-string 2 url)))))
8314    ((string-match "([^)\"]+)[^\"]+" url)
8315     (setq url
8316           (gnus-replace-in-string
8317            (gnus-replace-in-string url "[\n\t ]+" " ") "\"" ""))
8318     (gnus-info-find-node url))
8319    (t (error "Can't parse %s" url))))
8320
8321 (defun gnus-button-handle-info-url-gnome (url)
8322   "Fetch GNOME style info URL."
8323   (setq url (mm-subst-char-in-string ?_ ?\  url))
8324   (if (string-match "\\([^#]+\\)#?\\(.*\\)" url)
8325       (gnus-info-find-node
8326        (concat "("
8327                (gnus-url-unhex-string
8328                  (match-string 1 url))
8329                ")"
8330                (or (gnus-url-unhex-string
8331                     (match-string 2 url))
8332                    "Top")))
8333     (error "Can't parse %s" url)))
8334
8335 (defun gnus-button-handle-info-url-kde (url)
8336   "Fetch KDE style info URL."
8337   (gnus-info-find-node (gnus-url-unhex-string url)))
8338
8339 ;; (info) will autoload info.el
8340 (declare-function Info-menu "info" (menu-item &optional fork))
8341 (declare-function Info-index-next "info" (num))
8342
8343 (defun gnus-button-handle-info-keystrokes (url)
8344   "Call `info' when pushing the corresponding URL button."
8345   ;; For links like `C-h i d m gnus RET part RET , ,', `C-h i d m CC Mode RET'.
8346   (let (node indx comma)
8347     (if (string-match
8348          (concat "\\b\\(C-h\\|<?[Ff]1>?\\)[ \t\n]+i[ \t\n]+d?[ \t\n]?m[ \t\n]+"
8349                  "\\([^ ]+ ?[^ ]+\\)[ \t\n]+RET"
8350                  "\\([ \t\n]+i[ \t\n]+[^ ]+ ?[^ ]+[ \t\n]+RET\\>"
8351                  "\\(?:[ \t\n,]*\\)\\)?")
8352          url)
8353         (setq node (match-string 2 url)
8354               indx (match-string 3 url))
8355       (error "Can't parse %s" url))
8356     (info)
8357     (Info-directory)
8358     (Info-menu node)
8359     (when (> (length indx) 0)
8360       (string-match (concat "[ \t\n]+i[ \t\n]+\\([^ ]+ ?[^ ]+\\)[ \t\n]+RET\\>"
8361                             "\\([ \t\n,]*\\)")
8362                     indx)
8363       (setq comma (match-string 2 indx))
8364       (setq indx  (match-string 1 indx))
8365       (Info-index indx)
8366       (when comma
8367         (dotimes (i (with-temp-buffer
8368                       (insert comma)
8369                       ;; Note: the XEmacs version of `how-many' takes
8370                       ;; no optional argument.
8371                       (goto-char (point-min))
8372                       (how-many ",")))
8373           (Info-index-next 1)))
8374       nil)))
8375
8376 (autoload 'pgg-snarf-keys-region "pgg")
8377 ;; Called after pgg-snarf-keys-region, which autoloads pgg.el.
8378 (declare-function pgg-display-output-buffer "pgg" (start end status))
8379
8380 (defun gnus-button-openpgp (url)
8381   "Retrieve and add an OpenPGP key given URL from an OpenPGP header."
8382   (with-temp-buffer
8383     (mm-url-insert-file-contents-external url)
8384     (pgg-snarf-keys-region (point-min) (point-max))
8385     (pgg-display-output-buffer nil nil nil)))
8386
8387 (defun gnus-button-message-id (message-id)
8388   "Fetch MESSAGE-ID."
8389   (with-current-buffer gnus-summary-buffer
8390     (gnus-summary-refer-article message-id)))
8391
8392 (defun gnus-button-fetch-group (address &rest ignore)
8393   "Fetch GROUP specified by ADDRESS."
8394   (when (string-match "\\`\\(nntp\\|news\\):\\(//\\)?\\(.*\\)\\'"
8395                       address)
8396     ;; Allow to use `gnus-button-fetch-group' in `browse-url-browser-function'
8397     ;; for nntp:// and news://
8398     (setq address (match-string 3 address)))
8399   (if (not (string-match "[:/]" address))
8400       ;; This is just a simple group url.
8401       (gnus-group-read-ephemeral-group address gnus-select-method)
8402     (if (not
8403          (string-match
8404           "^\\([^:/]+\\)\\(:\\([^/]+\\)\\)?/\\([^/]+\\)\\(/\\([0-9]+\\)\\)?"
8405           address))
8406         (error "Can't parse %s" address)
8407       (gnus-group-read-ephemeral-group
8408        (match-string 4 address)
8409        `(nntp ,(match-string 1 address)
8410               (nntp-address ,(match-string 1 address))
8411               (nntp-port-number ,(if (match-end 3)
8412                                      (match-string 3 address)
8413                                    "nntp")))
8414        nil nil nil
8415        (and (match-end 6) (list (string-to-number (match-string 6 address))))))))
8416
8417 (defun gnus-url-parse-query-string (query &optional downcase)
8418   (let (retval pairs cur key val)
8419     (setq pairs (split-string query "&"))
8420     (while pairs
8421       (setq cur (car pairs)
8422             pairs (cdr pairs))
8423       (if (not (string-match "=" cur))
8424           nil                           ; Grace
8425         (setq key (gnus-url-unhex-string (substring cur 0 (match-beginning 0)))
8426               val (gnus-url-unhex-string (substring cur (match-end 0) nil) t))
8427         (if downcase
8428             (setq key (downcase key)))
8429         (setq cur (assoc key retval))
8430         (if cur
8431             (setcdr cur (cons val (cdr cur)))
8432           (setq retval (cons (list key val) retval)))))
8433     retval))
8434
8435 (defun gnus-url-mailto (url)
8436   ;; Send mail to someone
8437   (setq url (replace-regexp-in-string "\n" " " url))
8438   (when (string-match "mailto:/*\\(.*\\)" url)
8439     (setq url (substring url (match-beginning 1) nil)))
8440   (let (to args subject func)
8441     (setq args (gnus-url-parse-query-string
8442                 (if (string-match "^\\?" url)
8443                     (substring url 1)
8444                   (if (string-match "^\\([^?]+\\)\\?\\(.*\\)" url)
8445                       (concat "to=" (match-string 1 url) "&"
8446                               (match-string 2 url))
8447                     (concat "to=" url))))
8448           subject (cdr-safe (assoc "subject" args)))
8449     (gnus-msg-mail)
8450     (while args
8451       (setq func (intern-soft (concat "message-goto-" (downcase (caar args)))))
8452       (if (fboundp func)
8453           (funcall func)
8454         (message-position-on-field (caar args)))
8455       (insert (gnus-replace-in-string
8456                (mapconcat 'identity (reverse (cdar args)) ", ")
8457                "\r\n" "\n" t))
8458       (setq args (cdr args)))
8459     (if subject
8460         (message-goto-body)
8461       (message-goto-subject))))
8462
8463 (defun gnus-button-embedded-url (address)
8464   "Activate ADDRESS with `browse-url'."
8465   (browse-url (gnus-strip-whitespace address)))
8466
8467 ;;; Next/prev buttons in the article buffer.
8468
8469 (defvar gnus-next-page-line-format "%{%(Next page...%)%}\n")
8470 (defvar gnus-prev-page-line-format "%{%(Previous page...%)%}\n")
8471
8472 (defvar gnus-prev-page-map
8473   (let ((map (make-sparse-keymap)))
8474     (define-key map gnus-mouse-2 'gnus-button-prev-page)
8475     (define-key map "\r" 'gnus-button-prev-page)
8476     map))
8477
8478 (defvar gnus-next-page-map
8479   (let ((map (make-sparse-keymap)))
8480     (define-key map gnus-mouse-2 'gnus-button-next-page)
8481     (define-key map "\r" 'gnus-button-next-page)
8482     map))
8483
8484 (defun gnus-insert-prev-page-button ()
8485   (let ((b (point)) e
8486         (inhibit-read-only t))
8487     (gnus-eval-format
8488      gnus-prev-page-line-format nil
8489      `(keymap ,gnus-prev-page-map
8490               gnus-prev t
8491               gnus-callback gnus-article-button-prev-page
8492               article-type annotation))
8493     (setq e (if (bolp)
8494                 ;; Exclude a newline.
8495                 (1- (point))
8496               (point)))
8497     (when gnus-article-button-face
8498       (gnus-overlay-put (gnus-make-overlay b e nil t)
8499                         'face gnus-article-button-face))
8500     (widget-convert-button
8501      'link b e
8502      :action 'gnus-button-prev-page
8503      :button-keymap gnus-prev-page-map)))
8504
8505 (defun gnus-button-next-page (&optional args more-args)
8506   "Go to the next page."
8507   (interactive)
8508   (let ((win (selected-window)))
8509     (select-window (gnus-get-buffer-window gnus-article-buffer t))
8510     (gnus-article-next-page)
8511     (select-window win)))
8512
8513 (defun gnus-button-prev-page (&optional args more-args)
8514   "Go to the prev page."
8515   (interactive)
8516   (let ((win (selected-window)))
8517     (select-window (gnus-get-buffer-window gnus-article-buffer t))
8518     (gnus-article-prev-page)
8519     (select-window win)))
8520
8521 (defun gnus-insert-next-page-button ()
8522   (let ((b (point)) e
8523         (inhibit-read-only t))
8524     (gnus-eval-format gnus-next-page-line-format nil
8525                       `(keymap ,gnus-next-page-map
8526                                gnus-next t
8527                                gnus-callback gnus-article-button-next-page
8528                                article-type annotation))
8529     (setq e (if (bolp)
8530                 ;; Exclude a newline.
8531                 (1- (point))
8532               (point)))
8533     (when gnus-article-button-face
8534       (gnus-overlay-put (gnus-make-overlay b e nil t)
8535                         'face gnus-article-button-face))
8536     (widget-convert-button
8537      'link b e
8538      :action 'gnus-button-next-page
8539      :button-keymap gnus-next-page-map)))
8540
8541 (defun gnus-article-button-next-page (arg)
8542   "Go to the next page."
8543   (interactive "P")
8544   (let ((win (selected-window)))
8545     (select-window (gnus-get-buffer-window gnus-article-buffer t))
8546     (gnus-article-next-page)
8547     (select-window win)))
8548
8549 (defun gnus-article-button-prev-page (arg)
8550   "Go to the prev page."
8551   (interactive "P")
8552   (let ((win (selected-window)))
8553     (select-window (gnus-get-buffer-window gnus-article-buffer t))
8554     (gnus-article-prev-page)
8555     (select-window win)))
8556
8557 (defvar gnus-decode-header-methods
8558   '(mail-decode-encoded-word-region)
8559   "List of methods used to decode headers.
8560
8561 This variable is a list of FUNCTION or (REGEXP . FUNCTION).  If item
8562 is FUNCTION, FUNCTION will be applied to all newsgroups.  If item is a
8563 \(REGEXP . FUNCTION), FUNCTION will be only apply to the newsgroups
8564 whose names match REGEXP.
8565
8566 For example:
8567 \((\"chinese\" . gnus-decode-encoded-word-region-by-guess)
8568  mail-decode-encoded-word-region
8569  (\"chinese\" . rfc1843-decode-region))
8570 ")
8571
8572 (defvar gnus-decode-header-methods-cache nil)
8573
8574 (defun gnus-multi-decode-header (start end)
8575   "Apply the functions from `gnus-encoded-word-methods' that match."
8576   (unless (and gnus-decode-header-methods-cache
8577                (eq gnus-newsgroup-name
8578                    (car gnus-decode-header-methods-cache)))
8579     (setq gnus-decode-header-methods-cache (list gnus-newsgroup-name))
8580     (dolist (x gnus-decode-header-methods)
8581       (if (symbolp x)
8582           (nconc gnus-decode-header-methods-cache (list x))
8583         (if (and gnus-newsgroup-name
8584                  (string-match (car x) gnus-newsgroup-name))
8585             (nconc gnus-decode-header-methods-cache
8586                    (list (cdr x)))))))
8587   (let ((xlist gnus-decode-header-methods-cache))
8588     (pop xlist)
8589     (save-restriction
8590       (narrow-to-region start end)
8591       (while xlist
8592         (funcall (pop xlist) (point-min) (point-max))))))
8593
8594 ;;;
8595 ;;; Treatment top-level handling.
8596 ;;;
8597
8598 (defvar gnus-inhibit-article-treatments nil)
8599
8600 (defun gnus-treat-article (gnus-treat-condition
8601                            &optional part-number total-parts gnus-treat-type)
8602   (let ((gnus-treat-length (- (point-max) (point-min)))
8603         (alist gnus-treatment-function-alist)
8604         (article-goto-body-goes-to-point-min-p t)
8605         (treated-type
8606          (or (not gnus-treat-type)
8607              (catch 'found
8608                (let ((list gnus-article-treat-types))
8609                  (while list
8610                    (when (string-match (pop list) gnus-treat-type)
8611                      (throw 'found t)))))))
8612         (highlightp (gnus-visual-p 'article-highlight 'highlight))
8613         val elem)
8614     (gnus-run-hooks 'gnus-part-display-hook)
8615     (dolist (elem alist)
8616       (setq val
8617             (save-excursion
8618               (when (gnus-buffer-live-p gnus-summary-buffer)
8619                 (set-buffer gnus-summary-buffer))
8620               (symbol-value (car elem))))
8621       (when (and (or (consp val)
8622                      treated-type)
8623                  (or (not gnus-inhibit-article-treatments)
8624                      (eq gnus-treat-condition 'head))
8625                  (gnus-treat-predicate val)
8626                  (or (not (get (car elem) 'highlight))
8627                      highlightp))
8628         (save-restriction
8629           (funcall (cadr elem)))))))
8630
8631 ;; Dynamic variables.
8632 (defvar part-number)
8633 (defvar total-parts)
8634 (defvar gnus-treat-type)
8635 (defvar gnus-treat-condition)
8636 (defvar gnus-treat-length)
8637
8638 (defun gnus-treat-predicate (val)
8639   (cond
8640    ((null val)
8641     nil)
8642    (gnus-treat-condition
8643     (eq gnus-treat-condition val))
8644    ((and (listp val)
8645          (stringp (car val)))
8646     (apply 'gnus-or (mapcar `(lambda (s)
8647                                (string-match s ,(or gnus-newsgroup-name "")))
8648                             val)))
8649    ((listp val)
8650     (let ((pred (pop val)))
8651       (cond
8652        ((eq pred 'or)
8653         (apply 'gnus-or (mapcar 'gnus-treat-predicate val)))
8654        ((eq pred 'and)
8655         (apply 'gnus-and (mapcar 'gnus-treat-predicate val)))
8656        ((eq pred 'not)
8657         (not (gnus-treat-predicate (car val))))
8658        ((eq pred 'typep)
8659         (equal (car val) gnus-treat-type))
8660        ((functionp pred)
8661         (funcall pred))
8662        (t
8663         (error "%S is not a valid predicate" pred)))))
8664    ((eq val t)
8665     t)
8666    ((eq val 'head)
8667     nil)
8668    ((eq val 'first)
8669     (eq part-number 1))
8670    ((eq val 'last)
8671     (eq part-number total-parts))
8672    ((numberp val)
8673     (< gnus-treat-length val))
8674    (t
8675     (error "%S is not a valid value" val))))
8676
8677 (defun gnus-article-encrypt-body (protocol &optional n)
8678   "Encrypt the article body."
8679   (interactive
8680    (list
8681     (or gnus-article-encrypt-protocol
8682         (gnus-completing-read "Encrypt protocol"
8683                               (mapcar 'car gnus-article-encrypt-protocol-alist)
8684                               t))
8685     current-prefix-arg))
8686   ;; User might hit `K E' instead of `K e', so prompt once.
8687   (when (and gnus-article-encrypt-protocol
8688              gnus-novice-user)
8689     (unless (gnus-y-or-n-p "Really encrypt article(s)? ")
8690       (error "Encrypt aborted")))
8691   (let ((func (cdr (assoc protocol gnus-article-encrypt-protocol-alist))))
8692     (unless func
8693       (error "Can't find the encrypt protocol %s" protocol))
8694     (if (member gnus-newsgroup-name '("nndraft:delayed"
8695                                       "nndraft:drafts"
8696                                       "nndraft:queue"))
8697         (error "Can't encrypt the article in group %s"
8698                gnus-newsgroup-name))
8699     (gnus-summary-iterate n
8700       (with-current-buffer gnus-summary-buffer
8701         (let ((mail-parse-charset gnus-newsgroup-charset)
8702               (mail-parse-ignored-charsets gnus-newsgroup-ignored-charsets)
8703               (summary-buffer gnus-summary-buffer)
8704               references point)
8705           (gnus-set-global-variables)
8706           (when (gnus-group-read-only-p)
8707             (error "The current newsgroup does not support article encrypt"))
8708           (gnus-summary-show-article t)
8709           (setq references
8710               (or (mail-header-references gnus-current-headers) ""))
8711           (set-buffer gnus-article-buffer)
8712           (let* ((inhibit-read-only t)
8713                  (headers
8714                   (mapcar (lambda (field)
8715                             (and (save-restriction
8716                                    (message-narrow-to-head)
8717                                    (goto-char (point-min))
8718                                    (search-forward field nil t))
8719                                  (prog2
8720                                      (message-narrow-to-field)
8721                                      (buffer-string)
8722                                    (delete-region (point-min) (point-max))
8723                                    (widen))))
8724                           '("Content-Type:" "Content-Transfer-Encoding:"
8725                             "Content-Disposition:"))))
8726             (message-narrow-to-head)
8727             (message-remove-header "MIME-Version")
8728             (goto-char (point-max))
8729             (setq point (point))
8730             (insert (apply 'concat headers))
8731             (widen)
8732             (narrow-to-region point (point-max))
8733             (let ((message-options message-options))
8734               (message-options-set 'message-sender user-mail-address)
8735               (message-options-set 'message-recipients user-mail-address)
8736               (message-options-set 'message-sign-encrypt 'not)
8737               (funcall func))
8738             (goto-char (point-min))
8739             (insert "MIME-Version: 1.0\n")
8740             (widen)
8741             (gnus-summary-edit-article-done
8742              references nil summary-buffer t))
8743           (when gnus-keep-backlog
8744             (gnus-backlog-remove-article
8745              (car gnus-article-current) (cdr gnus-article-current)))
8746           (gnus-flush-original-article-buffer)
8747           (when gnus-use-cache
8748             (gnus-cache-update-article
8749              (car gnus-article-current) (cdr gnus-article-current))))))))
8750
8751 (defvar gnus-mime-security-button-line-format "%{%([[%t:%i]%D]%)%}\n"
8752   "The following specs can be used:
8753 %t  The security MIME type
8754 %i  Additional info
8755 %d  Details
8756 %D  Details if button is pressed")
8757
8758 (defvar gnus-mime-security-button-end-line-format "%{%([[End of %t]%D]%)%}\n"
8759   "The following specs can be used:
8760 %t  The security MIME type
8761 %i  Additional info
8762 %d  Details
8763 %D  Details if button is pressed")
8764
8765 (defvar gnus-mime-security-button-line-format-alist
8766   '((?t gnus-tmp-type ?s)
8767     (?i gnus-tmp-info ?s)
8768     (?d gnus-tmp-details ?s)
8769     (?D gnus-tmp-pressed-details ?s)))
8770
8771 (defvar gnus-mime-security-button-commands
8772   '((gnus-article-press-button "\r" "Show Detail")
8773     (undefined "v")
8774     (undefined "t")
8775     (undefined "C")
8776     (gnus-mime-security-save-part "o" "Save...")
8777     (undefined "\C-o")
8778     (undefined "r")
8779     (undefined "d")
8780     (undefined "c")
8781     (undefined "i")
8782     (undefined "E")
8783     (undefined "e")
8784     (undefined "p")
8785     (gnus-mime-security-pipe-part "|" "Pipe To Command...")
8786     (undefined ".")))
8787
8788 (defvar gnus-mime-security-button-map
8789   (let ((map (make-sparse-keymap)))
8790     (define-key map gnus-mouse-2 'gnus-article-push-button)
8791     (define-key map gnus-down-mouse-3 'gnus-mime-security-button-menu)
8792     (dolist (c gnus-mime-security-button-commands)
8793       (define-key map (cadr c) (car c)))
8794     map))
8795
8796 (easy-menu-define
8797   gnus-mime-security-button-menu gnus-mime-security-button-map
8798   "Security button menu."
8799   `("Security Part"
8800     ,@(delq nil
8801             (mapcar (lambda (c)
8802                       (unless (eq (car c) 'undefined)
8803                         (vector (caddr c) (car c) :active t)))
8804                     gnus-mime-security-button-commands))))
8805
8806 (defun gnus-mime-security-button-menu (event prefix)
8807   "Construct a context-sensitive menu of security commands."
8808   (interactive "e\nP")
8809   (save-window-excursion
8810     (let ((pos (event-start event)))
8811       (select-window (posn-window pos))
8812       (goto-char (posn-point pos))
8813       (gnus-article-check-buffer)
8814       (popup-menu gnus-mime-security-button-menu nil prefix))))
8815
8816 (defvar gnus-mime-security-details-buffer nil)
8817
8818 (defvar gnus-mime-security-button-pressed nil)
8819
8820 (defvar gnus-mime-security-show-details-inline t
8821   "If non-nil, show details in the article buffer.")
8822
8823 (defun gnus-mime-security-verify-or-decrypt (handle)
8824   (mm-remove-parts (cdr handle))
8825   (let ((region (mm-handle-multipart-ctl-parameter handle 'gnus-region))
8826         point (inhibit-read-only t))
8827     (if region
8828         (goto-char (car region)))
8829     (setq point (point))
8830     (with-current-buffer (mm-handle-multipart-original-buffer handle)
8831       (let* ((mm-verify-option 'known)
8832              (mm-decrypt-option 'known)
8833              (nparts (mm-possibly-verify-or-decrypt (cdr handle) handle)))
8834         (unless (eq nparts (cdr handle))
8835           (mm-destroy-parts (cdr handle))
8836           (setcdr handle nparts))))
8837     (gnus-mime-display-security handle)
8838     (when region
8839       (delete-region (point) (cdr region))
8840       (set-marker (car region) nil)
8841       (set-marker (cdr region) nil))
8842     (goto-char point)))
8843
8844 (defun gnus-mime-security-show-details (handle)
8845   (let ((details (mm-handle-multipart-ctl-parameter handle 'gnus-details)))
8846     (if (not details)
8847         (gnus-message 5 "No details.")
8848       (if gnus-mime-security-show-details-inline
8849           (let ((gnus-mime-security-button-pressed
8850                  (not (get-text-property (point) 'gnus-mime-details)))
8851                 (gnus-mime-security-button-line-format
8852                  (get-text-property (point) 'gnus-line-format))
8853                 (inhibit-read-only t))
8854             (forward-char -1)
8855             (while (eq (get-text-property (point) 'gnus-line-format)
8856                        gnus-mime-security-button-line-format)
8857               (forward-char -1))
8858             (forward-char)
8859             (save-restriction
8860               (narrow-to-region (point) (point))
8861               (gnus-insert-mime-security-button handle))
8862             (delete-region (point)
8863                            (or (text-property-not-all
8864                                 (point) (point-max)
8865                                 'gnus-line-format
8866                                 gnus-mime-security-button-line-format)
8867                                (point-max))))
8868         ;; Not inlined.
8869         (if (gnus-buffer-live-p gnus-mime-security-details-buffer)
8870             (with-current-buffer gnus-mime-security-details-buffer
8871               (erase-buffer)
8872               t)
8873           (setq gnus-mime-security-details-buffer
8874                 (gnus-get-buffer-create "*MIME Security Details*")))
8875         (with-current-buffer gnus-mime-security-details-buffer
8876           (insert details)
8877           (goto-char (point-min)))
8878         (pop-to-buffer gnus-mime-security-details-buffer)))))
8879
8880 (defun gnus-mime-security-press-button (handle)
8881   (save-excursion
8882     (if (mm-handle-multipart-ctl-parameter handle 'gnus-info)
8883         (gnus-mime-security-show-details handle)
8884       (gnus-mime-security-verify-or-decrypt handle))))
8885
8886 (defun gnus-insert-mime-security-button (handle &optional displayed)
8887   (let* ((protocol (mm-handle-multipart-ctl-parameter handle 'protocol))
8888          (gnus-tmp-type
8889           (concat
8890            (or (nth 2 (assoc protocol mm-verify-function-alist))
8891                (nth 2 (assoc protocol mm-decrypt-function-alist))
8892                "Unknown")
8893            (if (equal (car handle) "multipart/signed")
8894                " Signed" " Encrypted")
8895            " Part"))
8896          (gnus-tmp-info
8897           (or (mm-handle-multipart-ctl-parameter handle 'gnus-info)
8898               "Undecided"))
8899          (gnus-tmp-details
8900           (mm-handle-multipart-ctl-parameter handle 'gnus-details))
8901          gnus-tmp-pressed-details
8902          b e)
8903     (setq gnus-tmp-details
8904           (if gnus-tmp-details
8905               (concat "\n" gnus-tmp-details)
8906             ""))
8907     (setq gnus-tmp-pressed-details
8908           (if gnus-mime-security-button-pressed gnus-tmp-details ""))
8909     (unless (bolp)
8910       (insert "\n"))
8911     (setq b (point))
8912     (gnus-eval-format
8913      gnus-mime-security-button-line-format
8914      gnus-mime-security-button-line-format-alist
8915      `(keymap ,gnus-mime-security-button-map
8916          gnus-callback gnus-mime-security-press-button
8917          gnus-line-format ,gnus-mime-security-button-line-format
8918          gnus-mime-details ,gnus-mime-security-button-pressed
8919          article-type annotation
8920          gnus-data ,handle))
8921     (setq e (if (bolp)
8922                 ;; Exclude a newline.
8923                 (1- (point))
8924               (point)))
8925     (when gnus-article-button-face
8926       (gnus-overlay-put (gnus-make-overlay b e nil t)
8927                         'face gnus-article-button-face))
8928     (widget-convert-button
8929      'link b e
8930      :mime-handle handle
8931      :action 'gnus-widget-press-button
8932      :button-keymap gnus-mime-security-button-map
8933      :help-echo
8934      (lambda (widget)
8935        ;; Needed to properly clear the message due to a bug in
8936        ;; wid-edit (XEmacs only).
8937        (when (boundp 'help-echo-owns-message)
8938          (setq help-echo-owns-message t))
8939        (format
8940         "%S: show detail; %S: more options"
8941         (aref gnus-mouse-2 0)
8942         (aref gnus-down-mouse-3 0))))))
8943
8944 (defun gnus-mime-display-security (handle)
8945   (save-restriction
8946     (narrow-to-region (point) (point))
8947     (unless (gnus-unbuttonized-mime-type-p (car handle))
8948       (gnus-insert-mime-security-button handle))
8949     (gnus-mime-display-part (cadr handle))
8950     (unless (bolp)
8951       (insert "\n"))
8952     (unless (gnus-unbuttonized-mime-type-p (car handle))
8953       (let ((gnus-mime-security-button-line-format
8954              gnus-mime-security-button-end-line-format))
8955         (gnus-insert-mime-security-button handle)))
8956     (mm-set-handle-multipart-parameter
8957      handle 'gnus-region (cons (point-min-marker) (point-max-marker)))
8958     (goto-char (point-max))))
8959
8960 (defun gnus-mime-security-run-function (function)
8961   "Run FUNCTION with the security part under point."
8962   (gnus-article-check-buffer)
8963   (let ((data (get-text-property (point) 'gnus-data))
8964         buffer handle)
8965     (when (and (stringp (car-safe data))
8966                (setq buffer (mm-handle-multipart-original-buffer data))
8967                (setq handle (cadr data)))
8968       (if (bufferp (mm-handle-buffer handle))
8969           (progn
8970             (setq handle (cons buffer (copy-sequence (cdr handle))))
8971             (mm-handle-set-undisplayer handle nil))
8972         (setq handle (mm-make-handle
8973                       buffer
8974                       (mm-handle-multipart-ctl-parameter handle 'protocol)
8975                       nil nil nil nil nil nil)))
8976       (funcall function handle))))
8977
8978 (defun gnus-mime-security-save-part ()
8979   "Save the security part under point."
8980   (interactive)
8981   (gnus-mime-security-run-function 'mm-save-part))
8982
8983 (defun gnus-mime-security-pipe-part ()
8984   "Pipe the security part under point to a process."
8985   (interactive)
8986   (gnus-mime-security-run-function 'mm-pipe-part))
8987
8988 (gnus-ems-redefine)
8989
8990 (provide 'gnus-art)
8991
8992 (run-hooks 'gnus-art-load-hook)
8993
8994 ;;; gnus-art.el ends here