+++ /dev/null
-;;; gnus-dup.el --- suppression of duplicate articles in Gnus
-;; Copyright (C) 1996, 1997, 1998, 1999, 2000
-;; Free Software Foundation, Inc.
-
-;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
-;; Keywords: news
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
-
-;;; Commentary:
-
-;; This package tries to mark articles as read the second time the
-;; user reads a copy. This is useful if the server doesn't support
-;; Xref properly, or if the user reads the same group from several
-;; servers.
-
-;;; Code:
-
-(eval-when-compile (require 'cl))
-
-(require 'gnus)
-(require 'gnus-art)
-
-(defgroup gnus-duplicate nil
- "Suppression of duplicate articles."
- :group 'gnus)
-
-(defcustom gnus-save-duplicate-list nil
- "*If non-nil, save the duplicate list when shutting down Gnus.
-If nil, duplicate suppression will only work on duplicates
-seen in the same session."
- :group 'gnus-duplicate
- :type 'boolean)
-
-(defcustom gnus-duplicate-list-length 10000
- "*The number of Message-IDs to keep in the duplicate suppression list."
- :group 'gnus-duplicate
- :type 'integer)
-
-(defcustom gnus-duplicate-file (nnheader-concat gnus-directory "suppression")
- "*The name of the file to store the duplicate suppression list."
- :group 'gnus-duplicate
- :type 'file)
-
-;;; Internal variables
-
-(defvar gnus-dup-list nil)
-(defvar gnus-dup-hashtb nil)
-
-(defvar gnus-dup-list-dirty nil)
-
-;;;
-;;; Starting and stopping
-;;;
-
-(gnus-add-shutdown 'gnus-dup-close 'gnus)
-
-(defun gnus-dup-close ()
- "Possibly save the duplicate suppression list and shut down the subsystem."
- (gnus-dup-save)
- (setq gnus-dup-list nil
- gnus-dup-hashtb nil
- gnus-dup-list-dirty nil))
-
-(defun gnus-dup-open ()
- "Possibly read the duplicate suppression list and start the subsystem."
- (if gnus-save-duplicate-list
- (gnus-dup-read)
- (setq gnus-dup-list nil))
- (setq gnus-dup-hashtb (gnus-make-hashtable gnus-duplicate-list-length))
- ;; Enter all Message-IDs into the hash table.
- (let ((list gnus-dup-list)
- (obarray gnus-dup-hashtb))
- (while list
- (intern (pop list)))))
-
-(defun gnus-dup-read ()
- "Read the duplicate suppression list."
- (setq gnus-dup-list nil)
- (when (file-exists-p gnus-duplicate-file)
- (load gnus-duplicate-file t t t)))
-
-(defun gnus-dup-save ()
- "Save the duplicate suppression list."
- (when (and gnus-save-duplicate-list
- gnus-dup-list-dirty)
- (with-temp-file gnus-duplicate-file
- (gnus-prin1 `(setq gnus-dup-list ',gnus-dup-list))))
- (setq gnus-dup-list-dirty nil))
-
-;;;
-;;; Interface functions
-;;;
-
-(defun gnus-dup-enter-articles ()
- "Enter articles from the current group for future duplicate suppression."
- (unless gnus-dup-list
- (gnus-dup-open))
- (setq gnus-dup-list-dirty t) ; mark list for saving
- (let ((data gnus-newsgroup-data)
- datum msgid)
- ;; Enter the Message-IDs of all read articles into the list
- ;; and hash table.
- (while (setq datum (pop data))
- (when (and (not (gnus-data-pseudo-p datum))
- (> (gnus-data-number datum) 0)
- (not (memq (gnus-data-number datum) gnus-newsgroup-unreads))
- (not (= (gnus-data-mark datum) gnus-canceled-mark))
- (setq msgid (mail-header-id (gnus-data-header datum)))
- (not (nnheader-fake-message-id-p msgid))
- (not (intern-soft msgid gnus-dup-hashtb)))
- (push msgid gnus-dup-list)
- (intern msgid gnus-dup-hashtb))))
- ;; Chop off excess Message-IDs from the list.
- (let ((end (nthcdr gnus-duplicate-list-length gnus-dup-list)))
- (when end
- (setcdr end nil))))
-
-(defun gnus-dup-suppress-articles ()
- "Mark duplicate articles as read."
- (unless gnus-dup-list
- (gnus-dup-open))
- (gnus-message 6 "Suppressing duplicates...")
- (let ((headers gnus-newsgroup-headers)
- (auto (and gnus-newsgroup-auto-expire
- (memq gnus-duplicate-mark gnus-auto-expirable-marks)))
- number header)
- (while (setq header (pop headers))
- (when (and (intern-soft (mail-header-id header) gnus-dup-hashtb)
- (gnus-summary-article-unread-p (mail-header-number header)))
- (setq gnus-newsgroup-unreads
- (delq (setq number (mail-header-number header))
- gnus-newsgroup-unreads))
- (if (not auto)
- (push (cons number gnus-duplicate-mark) gnus-newsgroup-reads)
- (push number gnus-newsgroup-expirable)
- (push (cons number gnus-expirable-mark) gnus-newsgroup-reads)))))
- (gnus-message 6 "Suppressing duplicates...done"))
-
-(defun gnus-dup-unsuppress-article (article)
- "Stop suppression of ARTICLE."
- (let ((id (mail-header-id (gnus-data-header (gnus-data-find article)))))
- (when id
- (setq gnus-dup-list-dirty t)
- (setq gnus-dup-list (delete id gnus-dup-list))
- (unintern id gnus-dup-hashtb))))
-
-(provide 'gnus-dup)
-
-;;; gnus-dup.el ends here
projects / elisp / gnus.git- / blobdiff