lisp/gnus/gnus-kill.el

   1 ;;; gnus-kill.el --- kill commands for Gnus
   2 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
   3 ;;        Free Software Foundation, Inc.
   4
   5 ;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
   6 ;;      Lars Magne Ingebrigtsen <larsi@gnus.org>
   7 ;; Keywords: news
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 2, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24 ;; Boston, MA 02111-1307, USA.
  25
  26 ;;; Commentary:
  27
  28 ;;; Code:
  29
  30 (eval-when-compile (require 'cl))
  31
  32 (require 'gnus)
  33 (require 'gnus-art)
  34 (require 'gnus-range)
  35
  36 (defcustom gnus-kill-file-mode-hook nil
  37   "Hook for Gnus kill file mode."
  38   :group 'gnus-score-kill
  39   :type 'hook)
  40
  41 (defcustom gnus-kill-expiry-days 7
  42   "*Number of days before expiring unused kill file entries."
  43   :group 'gnus-score-kill
  44   :group 'gnus-score-expire
  45   :type 'integer)
  46
  47 (defcustom gnus-kill-save-kill-file nil
  48   "*If non-nil, will save kill files after processing them."
  49   :group 'gnus-score-kill
  50   :type 'boolean)
  51
  52 (defcustom gnus-winconf-kill-file nil
  53   "What does this do, Lars?
  54 I don't know, Per."
  55   :group 'gnus-score-kill
  56   :type 'sexp)
  57
  58 (defcustom gnus-kill-killed t
  59   "*If non-nil, Gnus will apply kill files to already killed articles.
  60 If it is nil, Gnus will never apply kill files to articles that have
  61 already been through the scoring process, which might very well save lots
  62 of time."
  63   :group 'gnus-score-kill
  64   :type 'boolean)
  65
  66 \f
  67
  68 (defmacro gnus-raise (field expression level)
  69   `(gnus-kill ,field ,expression
  70               (function (gnus-summary-raise-score ,level)) t))
  71
  72 (defmacro gnus-lower (field expression level)
  73   `(gnus-kill ,field ,expression
  74               (function (gnus-summary-raise-score (- ,level))) t))
  75
  76 ;;;
  77 ;;; Gnus Kill File Mode
  78 ;;;
  79
  80 (defvar gnus-kill-file-mode-map nil)
  81
  82 (unless gnus-kill-file-mode-map
  83   (gnus-define-keymap (setq gnus-kill-file-mode-map
  84                             (copy-keymap emacs-lisp-mode-map))
  85     "\C-c\C-k\C-s" gnus-kill-file-kill-by-subject
  86     "\C-c\C-k\C-a" gnus-kill-file-kill-by-author
  87     "\C-c\C-k\C-t" gnus-kill-file-kill-by-thread
  88     "\C-c\C-k\C-x" gnus-kill-file-kill-by-xref
  89     "\C-c\C-a" gnus-kill-file-apply-buffer
  90     "\C-c\C-e" gnus-kill-file-apply-last-sexp
  91     "\C-c\C-c" gnus-kill-file-exit))
  92
  93 (defun gnus-kill-file-mode ()
  94   "Major mode for editing kill files.
  95
  96 If you are using this mode - you probably shouldn't.  Kill files
  97 perform badly and paint with a pretty broad brush.  Score files, on
  98 the other hand, are vastly faster (40x speedup) and give you more
  99 control over what to do.
 100
 101 In addition to Emacs-Lisp Mode, the following commands are available:
 102
 103 \\{gnus-kill-file-mode-map}
 104
 105   A kill file contains Lisp expressions to be applied to a selected
 106 newsgroup.  The purpose is to mark articles as read on the basis of
 107 some set of regexps.  A global kill file is applied to every newsgroup,
 108 and a local kill file is applied to a specified newsgroup.  Since a
 109 global kill file is applied to every newsgroup, for better performance
 110 use a local one.
 111
 112   A kill file can contain any kind of Emacs Lisp expressions expected
 113 to be evaluated in the Summary buffer.  Writing Lisp programs for this
 114 purpose is not so easy because the internal working of Gnus must be
 115 well-known.  For this reason, Gnus provides a general function which
 116 does this easily for non-Lisp programmers.
 117
 118   The `gnus-kill' function executes commands available in Summary Mode
 119 by their key sequences.  `gnus-kill' should be called with FIELD,
 120 REGEXP and optional COMMAND and ALL.  FIELD is a string representing
 121 the header field or an empty string.  If FIELD is an empty string, the
 122 entire article body is searched for.  REGEXP is a string which is
 123 compared with FIELD value.  COMMAND is a string representing a valid
 124 key sequence in Summary mode or Lisp expression.  COMMAND defaults to
 125 '(gnus-summary-mark-as-read nil \"X\").  Make sure that COMMAND is
 126 executed in the Summary buffer.  If the second optional argument ALL
 127 is non-nil, the COMMAND is applied to articles which are already
 128 marked as read or unread.  Articles which are marked are skipped over
 129 by default.
 130
 131   For example, if you want to mark articles of which subjects contain
 132 the string `AI' as read, a possible kill file may look like:
 133
 134         (gnus-kill \"Subject\" \"AI\")
 135
 136   If you want to mark articles with `D' instead of `X', you can use
 137 the following expression:
 138
 139         (gnus-kill \"Subject\" \"AI\" \"d\")
 140
 141 In this example it is assumed that the command
 142 `gnus-summary-mark-as-read-forward' is assigned to `d' in Summary Mode.
 143
 144   It is possible to delete unnecessary headers which are marked with
 145 `X' in a kill file as follows:
 146
 147         (gnus-expunge \"X\")
 148
 149   If the Summary buffer is empty after applying kill files, Gnus will
 150 exit the selected newsgroup normally.  If headers which are marked
 151 with `D' are deleted in a kill file, it is impossible to read articles
 152 which are marked as read in the previous Gnus sessions.  Marks other
 153 than `D' should be used for articles which should really be deleted.
 154
 155 Entry to this mode calls emacs-lisp-mode-hook and
 156 gnus-kill-file-mode-hook with no arguments, if that value is non-nil."
 157   (interactive)
 158   (kill-all-local-variables)
 159   (use-local-map gnus-kill-file-mode-map)
 160   (set-syntax-table emacs-lisp-mode-syntax-table)
 161   (setq major-mode 'gnus-kill-file-mode)
 162   (setq mode-name "Kill")
 163   (lisp-mode-variables nil)
 164   (gnus-run-hooks 'emacs-lisp-mode-hook 'gnus-kill-file-mode-hook))
 165
 166 (defun gnus-kill-file-edit-file (newsgroup)
 167   "Begin editing a kill file for NEWSGROUP.
 168 If NEWSGROUP is nil, the global kill file is selected."
 169   (interactive "sNewsgroup: ")
 170   (let ((file (gnus-newsgroup-kill-file newsgroup)))
 171     (gnus-make-directory (file-name-directory file))
 172     ;; Save current window configuration if this is first invocation.
 173     (or (and (get-file-buffer file)
 174              (get-buffer-window (get-file-buffer file)))
 175         (setq gnus-winconf-kill-file (current-window-configuration)))
 176     ;; Hack windows.
 177     (let ((buffer (find-file-noselect file)))
 178       (cond ((get-buffer-window buffer)
 179              (pop-to-buffer buffer))
 180             ((eq major-mode 'gnus-group-mode)
 181              (gnus-configure-windows 'group) ;Take all windows.
 182              (pop-to-buffer buffer))
 183             ((eq major-mode 'gnus-summary-mode)
 184              (gnus-configure-windows 'article)
 185              (pop-to-buffer gnus-article-buffer)
 186              (bury-buffer gnus-article-buffer)
 187              (switch-to-buffer buffer))
 188             (t                          ;No good rules.
 189              (find-file-other-window file))))
 190     (gnus-kill-file-mode)))
 191
 192 ;; Fix by Sudish Joseph <joseph@cis.ohio-state.edu>.
 193 (defun gnus-kill-set-kill-buffer ()
 194   (let* ((file (gnus-newsgroup-kill-file gnus-newsgroup-name))
 195          (buffer (find-file-noselect file)))
 196     (set-buffer buffer)
 197     (gnus-kill-file-mode)
 198     (bury-buffer buffer)))
 199
 200 (defun gnus-kill-file-enter-kill (field regexp &optional dont-move)
 201   ;; Enter kill file entry.
 202   ;; FIELD: String containing the name of the header field to kill.
 203   ;; REGEXP: The string to kill.
 204   (save-excursion
 205     (let (string)
 206       (unless (eq major-mode 'gnus-kill-file-mode)
 207         (gnus-kill-set-kill-buffer))
 208       (unless dont-move
 209         (goto-char (point-max)))
 210       (insert (setq string (format "(gnus-kill %S %S)\n" field regexp)))
 211       (gnus-kill-file-apply-string string))))
 212
 213 (defun gnus-kill-file-kill-by-subject ()
 214   "Kill by subject."
 215   (interactive)
 216   (gnus-kill-file-enter-kill
 217    "Subject"
 218    (if (vectorp gnus-current-headers)
 219        (regexp-quote
 220         (gnus-simplify-subject (mail-header-subject gnus-current-headers)))
 221      "")
 222    t))
 223
 224 (defun gnus-kill-file-kill-by-author ()
 225   "Kill by author."
 226   (interactive)
 227   (gnus-kill-file-enter-kill
 228    "From"
 229    (if (vectorp gnus-current-headers)
 230        (regexp-quote (mail-header-from gnus-current-headers))
 231      "") t))
 232
 233 (defun gnus-kill-file-kill-by-thread ()
 234   "Kill by author."
 235   (interactive)
 236   (gnus-kill-file-enter-kill
 237    "References"
 238    (if (vectorp gnus-current-headers)
 239        (regexp-quote (mail-header-id gnus-current-headers))
 240      "")))
 241
 242 (defun gnus-kill-file-kill-by-xref ()
 243   "Kill by Xref."
 244   (interactive)
 245   (let ((xref (and (vectorp gnus-current-headers)
 246                    (mail-header-xref gnus-current-headers)))
 247         (start 0)
 248         group)
 249     (if xref
 250         (while (string-match " \\([^ \t]+\\):" xref start)
 251           (setq start (match-end 0))
 252           (when (not (string=
 253                       (setq group
 254                             (substring xref (match-beginning 1) (match-end 1)))
 255                       gnus-newsgroup-name))
 256             (gnus-kill-file-enter-kill
 257              "Xref" (concat " " (regexp-quote group) ":") t)))
 258       (gnus-kill-file-enter-kill "Xref" "" t))))
 259
 260 (defun gnus-kill-file-raise-followups-to-author (level)
 261   "Raise score for all followups to the current author."
 262   (interactive "p")
 263   (let ((name (mail-header-from gnus-current-headers))
 264         string)
 265     (save-excursion
 266       (gnus-kill-set-kill-buffer)
 267       (goto-char (point-min))
 268       (setq name (read-string (concat "Add " level
 269                                       " to followup articles to: ")
 270                               (regexp-quote name)))
 271       (setq
 272        string
 273        (format
 274         "(gnus-kill %S %S '(gnus-summary-temporarily-raise-by-thread %S))\n"
 275         "From" name level))
 276       (insert string)
 277       (gnus-kill-file-apply-string string))
 278     (gnus-message
 279      6 "Added temporary score file entry for followups to %s." name)))
 280
 281 (defun gnus-kill-file-apply-buffer ()
 282   "Apply current buffer to current newsgroup."
 283   (interactive)
 284   (if (and gnus-current-kill-article
 285            (get-buffer gnus-summary-buffer))
 286       ;; Assume newsgroup is selected.
 287       (gnus-kill-file-apply-string (buffer-string))
 288     (ding) (gnus-message 2 "No newsgroup is selected.")))
 289
 290 (defun gnus-kill-file-apply-string (string)
 291   "Apply STRING to current newsgroup."
 292   (interactive)
 293   (let ((string (concat "(progn \n" string "\n)")))
 294     (save-excursion
 295       (save-window-excursion
 296         (pop-to-buffer gnus-summary-buffer)
 297         (eval (car (read-from-string string)))))))
 298
 299 (defun gnus-kill-file-apply-last-sexp ()
 300   "Apply sexp before point in current buffer to current newsgroup."
 301   (interactive)
 302   (if (and gnus-current-kill-article
 303            (get-buffer gnus-summary-buffer))
 304       ;; Assume newsgroup is selected.
 305       (let ((string
 306              (buffer-substring
 307               (save-excursion (forward-sexp -1) (point)) (point))))
 308         (save-excursion
 309           (save-window-excursion
 310             (pop-to-buffer gnus-summary-buffer)
 311             (eval (car (read-from-string string))))))
 312     (ding) (gnus-message 2 "No newsgroup is selected.")))
 313
 314 (defun gnus-kill-file-exit ()
 315   "Save a kill file, then return to the previous buffer."
 316   (interactive)
 317   (save-buffer)
 318   (let ((killbuf (current-buffer)))
 319     ;; We don't want to return to article buffer.
 320     (when (get-buffer gnus-article-buffer)
 321       (bury-buffer gnus-article-buffer))
 322     ;; Delete the KILL file windows.
 323     (delete-windows-on killbuf)
 324     ;; Restore last window configuration if available.
 325     (when gnus-winconf-kill-file
 326       (set-window-configuration gnus-winconf-kill-file))
 327     (setq gnus-winconf-kill-file nil)
 328     ;; Kill the KILL file buffer.  Suggested by tale@pawl.rpi.edu.
 329     (kill-buffer killbuf)))
 330
 331 ;; For kill files
 332
 333 (defun gnus-Newsgroup-kill-file (newsgroup)
 334   "Return the name of a kill file for NEWSGROUP.
 335 If NEWSGROUP is nil, return the global kill file instead."
 336   (cond ((or (null newsgroup)
 337              (string-equal newsgroup ""))
 338          ;; The global kill file is placed at top of the directory.
 339          (expand-file-name gnus-kill-file-name gnus-kill-files-directory))
 340         (gnus-use-long-file-name
 341          ;; Append ".KILL" to capitalized newsgroup name.
 342          (expand-file-name (concat (gnus-capitalize-newsgroup newsgroup)
 343                                    "." gnus-kill-file-name)
 344                            gnus-kill-files-directory))
 345         (t
 346          ;; Place "KILL" under the hierarchical directory.
 347          (expand-file-name (concat (gnus-newsgroup-directory-form newsgroup)
 348                                    "/" gnus-kill-file-name)
 349                            gnus-kill-files-directory))))
 350
 351 (defun gnus-expunge (marks)
 352   "Remove lines marked with MARKS."
 353   (save-excursion
 354     (set-buffer gnus-summary-buffer)
 355     (gnus-summary-limit-to-marks marks 'reverse)))
 356
 357 (defun gnus-apply-kill-file-unless-scored ()
 358   "Apply .KILL file, unless a .SCORE file for the same newsgroup exists."
 359   (cond ((file-exists-p (gnus-score-file-name gnus-newsgroup-name))
 360          ;; Ignores global KILL.
 361          (when (file-exists-p (gnus-newsgroup-kill-file gnus-newsgroup-name))
 362            (gnus-message 3 "Note: Ignoring %s.KILL; preferring .SCORE"
 363                          gnus-newsgroup-name))
 364          0)
 365         ((or (file-exists-p (gnus-newsgroup-kill-file nil))
 366              (file-exists-p (gnus-newsgroup-kill-file gnus-newsgroup-name)))
 367          (gnus-apply-kill-file-internal))
 368         (t
 369          0)))
 370
 371 (defun gnus-apply-kill-file-internal ()
 372   "Apply a kill file to the current newsgroup.
 373 Returns the number of articles marked as read."
 374   (let* ((kill-files (list (gnus-newsgroup-kill-file nil)
 375                            (gnus-newsgroup-kill-file gnus-newsgroup-name)))
 376          (unreads (length gnus-newsgroup-unreads))
 377          (gnus-summary-inhibit-highlight t)
 378          beg)
 379     (setq gnus-newsgroup-kill-headers nil)
 380     ;; If there are any previously scored articles, we remove these
 381     ;; from the `gnus-newsgroup-headers' list that the score functions
 382     ;; will see.  This is probably pretty wasteful when it comes to
 383     ;; conses, but is, I think, faster than having to assq in every
 384     ;; single score function.
 385     (let ((files kill-files))
 386       (while files
 387         (if (file-exists-p (car files))
 388             (let ((headers gnus-newsgroup-headers))
 389               (if gnus-kill-killed
 390                   (setq gnus-newsgroup-kill-headers
 391                         (mapcar (lambda (header) (mail-header-number header))
 392                                 headers))
 393                 (while headers
 394                   (unless (gnus-member-of-range
 395                            (mail-header-number (car headers))
 396                            gnus-newsgroup-killed)
 397                     (push (mail-header-number (car headers))
 398                           gnus-newsgroup-kill-headers))
 399                   (setq headers (cdr headers))))
 400               (setq files nil))
 401           (setq files (cdr files)))))
 402     (if (not gnus-newsgroup-kill-headers)
 403         ()
 404       (save-window-excursion
 405         (save-excursion
 406           (while kill-files
 407             (if (not (file-exists-p (car kill-files)))
 408                 ()
 409               (gnus-message 6 "Processing kill file %s..." (car kill-files))
 410               (find-file (car kill-files))
 411               (goto-char (point-min))
 412
 413               (if (consp (ignore-errors (read (current-buffer))))
 414                   (gnus-kill-parse-gnus-kill-file)
 415                 (gnus-kill-parse-rn-kill-file))
 416
 417               (gnus-message
 418                6 "Processing kill file %s...done" (car kill-files)))
 419             (setq kill-files (cdr kill-files)))))
 420
 421       (gnus-set-mode-line 'summary)
 422
 423       (if beg
 424           (let ((nunreads (- unreads (length gnus-newsgroup-unreads))))
 425             (or (eq nunreads 0)
 426                 (gnus-message 6 "Marked %d articles as read" nunreads))
 427             nunreads)
 428         0))))
 429
 430 ;; Parse a Gnus killfile.
 431 (defun gnus-score-insert-help (string alist idx)
 432   (save-excursion
 433     (pop-to-buffer "*Score Help*")
 434     (buffer-disable-undo)
 435     (erase-buffer)
 436     (insert string ":\n\n")
 437     (while alist
 438       (insert (format " %c: %s\n" (caar alist) (nth idx (car alist))))
 439       (setq alist (cdr alist)))))
 440
 441 (defun gnus-kill-parse-gnus-kill-file ()
 442   (goto-char (point-min))
 443   (gnus-kill-file-mode)
 444   (let (beg form)
 445     (while (progn
 446              (setq beg (point))
 447              (setq form (ignore-errors (read (current-buffer)))))
 448       (unless (listp form)
 449         (error "Invalid kill entry (possibly rn kill file?): %s" form))
 450       (if (or (eq (car form) 'gnus-kill)
 451               (eq (car form) 'gnus-raise)
 452               (eq (car form) 'gnus-lower))
 453           (progn
 454             (delete-region beg (point))
 455             (insert (or (eval form) "")))
 456         (save-excursion
 457           (set-buffer gnus-summary-buffer)
 458           (ignore-errors (eval form)))))
 459     (and (buffer-modified-p)
 460          gnus-kill-save-kill-file
 461          (save-buffer))
 462     (set-buffer-modified-p nil)))
 463
 464 ;; Parse an rn killfile.
 465 (defun gnus-kill-parse-rn-kill-file ()
 466   (goto-char (point-min))
 467   (gnus-kill-file-mode)
 468   (let ((mod-to-header
 469          '((?a . "")
 470            (?h . "")
 471            (?f . "from")
 472            (?: . "subject")))
 473         ;;(com-to-com
 474         ;; '((?m . " ")
 475         ;;   (?j . "X")))
 476         pattern modifier commands)
 477     (while (not (eobp))
 478       (if (not (looking-at "[ \t]*/\\([^/]*\\)/\\([ahfcH]\\)?:\\([a-z=:]*\\)"))
 479           ()
 480         (setq pattern (buffer-substring (match-beginning 1) (match-end 1)))
 481         (setq modifier (if (match-beginning 2) (char-after (match-beginning 2))
 482                          ?s))
 483         (setq commands (buffer-substring (match-beginning 3) (match-end 3)))
 484
 485         ;; The "f:+" command marks everything *but* the matches as read,
 486         ;; so we simply first match everything as read, and then unmark
 487         ;; PATTERN later.
 488         (when (string-match "\\+" commands)
 489           (gnus-kill "from" ".")
 490           (setq commands "m"))
 491
 492         (gnus-kill
 493          (or (cdr (assq modifier mod-to-header)) "subject")
 494          pattern
 495          (if (string-match "m" commands)
 496              '(gnus-summary-mark-as-unread nil " ")
 497            '(gnus-summary-mark-as-read nil "X"))
 498          nil t))
 499       (forward-line 1))))
 500
 501 ;; Kill changes and new format by suggested by JWZ and Sudish Joseph
 502 ;; <joseph@cis.ohio-state.edu>.
 503 (defun gnus-kill (field regexp &optional exe-command all silent)
 504   "If FIELD of an article matches REGEXP, execute COMMAND.
 505 Optional 1st argument COMMAND is default to
 506         (gnus-summary-mark-as-read nil \"X\").
 507 If optional 2nd argument ALL is non-nil, articles marked are also applied to.
 508 If FIELD is an empty string (or nil), entire article body is searched for.
 509 COMMAND must be a lisp expression or a string representing a key sequence."
 510   ;; We don't want to change current point nor window configuration.
 511   (let ((old-buffer (current-buffer)))
 512     (save-excursion
 513       (save-window-excursion
 514         ;; Selected window must be summary buffer to execute keyboard
 515         ;; macros correctly.  See command_loop_1.
 516         (switch-to-buffer gnus-summary-buffer 'norecord)
 517         (goto-char (point-min))         ;From the beginning.
 518         (let ((kill-list regexp)
 519               (date (current-time-string))
 520               (command (or exe-command '(gnus-summary-mark-as-read
 521                                          nil gnus-kill-file-mark)))
 522               kill kdate prev)
 523           (if (listp kill-list)
 524               ;; It is a list.
 525               (if (not (consp (cdr kill-list)))
 526                   ;; It's of the form (regexp . date).
 527                   (if (zerop (gnus-execute field (car kill-list)
 528                                            command nil (not all)))
 529                       (when (> (days-between date (cdr kill-list))
 530                                gnus-kill-expiry-days)
 531                         (setq regexp nil))
 532                     (setcdr kill-list date))
 533                 (while (setq kill (car kill-list))
 534                   (if (consp kill)
 535                       ;; It's a temporary kill.
 536                       (progn
 537                         (setq kdate (cdr kill))
 538                         (if (zerop (gnus-execute
 539                                     field (car kill) command nil (not all)))
 540                             (when (> (days-between date kdate)
 541                                      gnus-kill-expiry-days)
 542                               ;; Time limit has been exceeded, so we
 543                               ;; remove the match.
 544                               (if prev
 545                                   (setcdr prev (cdr kill-list))
 546                                 (setq regexp (cdr regexp))))
 547                           ;; Successful kill.  Set the date to today.
 548                           (setcdr kill date)))
 549                     ;; It's a permanent kill.
 550                     (gnus-execute field kill command nil (not all)))
 551                   (setq prev kill-list)
 552                   (setq kill-list (cdr kill-list))))
 553             (gnus-execute field kill-list command nil (not all))))))
 554     (switch-to-buffer old-buffer)
 555     (when (and (eq major-mode 'gnus-kill-file-mode) regexp (not silent))
 556       (gnus-pp-gnus-kill
 557        (nconc (list 'gnus-kill field
 558                     (if (consp regexp) (list 'quote regexp) regexp))
 559               (when (or exe-command all)
 560                 (list (list 'quote exe-command)))
 561               (if all (list t) nil))))))
 562
 563 (defun gnus-pp-gnus-kill (object)
 564   (if (or (not (consp (nth 2 object)))
 565           (not (consp (cdr (nth 2 object))))
 566           (and (eq 'quote (car (nth 2 object)))
 567                (not (consp (cdadr (nth 2 object))))))
 568       (concat "\n" (gnus-prin1-to-string object))
 569     (save-excursion
 570       (set-buffer (gnus-get-buffer-create "*Gnus PP*"))
 571       (buffer-disable-undo)
 572       (erase-buffer)
 573       (insert (format "\n(%S %S\n  '(" (nth 0 object) (nth 1 object)))
 574       (let ((klist (cadr (nth 2 object)))
 575             (first t))
 576         (while klist
 577           (insert (if first (progn (setq first nil) "")  "\n    ")
 578                   (gnus-prin1-to-string (car klist)))
 579           (setq klist (cdr klist))))
 580       (insert ")")
 581       (and (nth 3 object)
 582            (insert "\n  "
 583                    (if (and (consp (nth 3 object))
 584                             (not (eq 'quote (car (nth 3 object)))))
 585                        "'" "")
 586                    (gnus-prin1-to-string (nth 3 object))))
 587       (when (nth 4 object)
 588         (insert "\n  t"))
 589       (insert ")")
 590       (prog1
 591           (buffer-substring (point-min) (point-max))
 592         (kill-buffer (current-buffer))))))
 593
 594 (defun gnus-execute-1 (function regexp form header)
 595   (save-excursion
 596     (let (did-kill)
 597       (if (null header)
 598           nil                           ;Nothing to do.
 599         (if function
 600             ;; Compare with header field.
 601             (let (value)
 602               (and header
 603                    (progn
 604                      (setq value (funcall function header))
 605                      ;; Number (Lines:) or symbol must be converted to string.
 606                      (unless (stringp value)
 607                        (setq value (gnus-prin1-to-string value)))
 608                      (setq did-kill (string-match regexp value)))
 609                    (cond ((stringp form) ;Keyboard macro.
 610                           (execute-kbd-macro form))
 611                          ((gnus-functionp form)
 612                           (funcall form))
 613                          (t
 614                           (eval form)))))
 615           ;; Search article body.
 616           (let ((gnus-current-article nil) ;Save article pointer.
 617                 (gnus-last-article nil)
 618                 (gnus-break-pages nil)  ;No need to break pages.
 619                 (gnus-mark-article-hook nil)) ;Inhibit marking as read.
 620             (gnus-message
 621              6 "Searching for article: %d..." (mail-header-number header))
 622             (gnus-article-setup-buffer)
 623             (gnus-article-prepare (mail-header-number header) t)
 624             (when (save-excursion
 625                     (set-buffer gnus-article-buffer)
 626                     (goto-char (point-min))
 627                     (setq did-kill (re-search-forward regexp nil t)))
 628               (cond ((stringp form)     ;Keyboard macro.
 629                      (execute-kbd-macro form))
 630                     ((gnus-functionp form)
 631                      (funcall form))
 632                     (t
 633                      (eval form)))))))
 634       did-kill)))
 635
 636 (defun gnus-execute (field regexp form &optional backward unread)
 637   "If FIELD of article header matches REGEXP, execute lisp FORM (or a string).
 638 If FIELD is an empty string (or nil), entire article body is searched for.
 639 If optional 1st argument BACKWARD is non-nil, do backward instead.
 640 If optional 2nd argument UNREAD is non-nil, articles which are
 641 marked as read or ticked are ignored."
 642   (save-excursion
 643     (let ((killed-no 0)
 644           function article header)
 645       (cond
 646        ;; Search body.
 647        ((or (null field)
 648             (string-equal field ""))
 649         (setq function nil))
 650        ;; Get access function of header field.
 651        ((fboundp
 652          (setq function
 653                (intern-soft
 654                 (concat "mail-header-" (downcase field)))))
 655         (setq function `(lambda (h) (,function h))))
 656        ;; Signal error.
 657        (t
 658         (error "Unknown header field: \"%s\"" field)))
 659       ;; Starting from the current article.
 660       (while (or
 661               ;; First article.
 662               (and (not article)
 663                    (setq article (gnus-summary-article-number)))
 664               ;; Find later articles.
 665               (setq article
 666                     (gnus-summary-search-forward unread nil backward)))
 667         (and (or (null gnus-newsgroup-kill-headers)
 668                  (memq article gnus-newsgroup-kill-headers))
 669              (vectorp (setq header (gnus-summary-article-header article)))
 670              (gnus-execute-1 function regexp form header)
 671              (setq killed-no (1+ killed-no))))
 672       ;; Return the number of killed articles.
 673       killed-no)))
 674
 675 ;;;###autoload
 676 (defalias 'gnus-batch-kill 'gnus-batch-score)
 677 ;;;###autoload
 678 (defun gnus-batch-score ()
 679   "Run batched scoring.
 680 Usage: emacs -batch -l ~/.emacs -l gnus -f gnus-batch-score"
 681   (interactive)
 682   (let* ((gnus-newsrc-options-n
 683           (gnus-newsrc-parse-options
 684            (concat "options -n "
 685                    (mapconcat 'identity command-line-args-left " "))))
 686          (gnus-expert-user t)
 687          (nnmail-spool-file nil)
 688          (mail-sources nil)
 689          (gnus-use-dribble-file nil)
 690          (gnus-batch-mode t)
 691          info group newsrc entry
 692          ;; Disable verbose message.
 693          gnus-novice-user gnus-large-newsgroup
 694          gnus-options-subscribe gnus-auto-subscribed-groups
 695          gnus-options-not-subscribe)
 696     ;; Eat all arguments.
 697     (setq command-line-args-left nil)
 698     (gnus-slave)
 699     ;; Apply kills to specified newsgroups in command line arguments.
 700     (setq newsrc (cdr gnus-newsrc-alist))
 701     (while (setq info (pop newsrc))
 702       (setq group (gnus-info-group info)
 703             entry (gnus-gethash group gnus-newsrc-hashtb))
 704       (when (and (<= (gnus-info-level info) gnus-level-subscribed)
 705                  (and (car entry)
 706                       (or (eq (car entry) t)
 707                           (not (zerop (car entry))))))
 708         (ignore-errors
 709           (gnus-summary-read-group group nil t nil t))
 710         (when (eq (current-buffer) (get-buffer gnus-summary-buffer))
 711           (gnus-summary-exit))))
 712     ;; Exit Emacs.
 713     (switch-to-buffer gnus-group-buffer)
 714     (gnus-group-save-newsrc)))
 715
 716 (provide 'gnus-kill)
 717
 718 ;;; gnus-kill.el ends here