lisp/gnus/nnregistry.el

   1 ;;; nnregistry.el --- access to articles via Gnus' message-id registry
   2 ;;; -*- coding: utf-8 -*-
   3
   4 ;; Copyright (C) 2010-2011 Free Software Foundation, Inc.
   5
   6 ;; Authors: Ludovic Courtès <ludo@gnu.org>
   7 ;; Keywords: news, mail
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; This file provides the `nnregistry' Gnus back-end.  It can be used
  27 ;; in `gnus-refer-article-method' to quickly search for a message by
  28 ;; id, regardless of the back-end that stores it.  See the Gnus manual
  29 ;; for usage examples and more information.
  30
  31 ;;; Code:
  32
  33 (require 'nnoo)
  34 (require 'gnus-registry)
  35 (require 'gnus-int)
  36
  37 (nnoo-declare nnregistry)
  38
  39 (deffoo nnregistry-server-opened (server)
  40   (eq gnus-registry-install t))
  41
  42 (deffoo nnregistry-close-server (server)
  43   t)
  44
  45 (deffoo nnregistry-status-message (server)
  46   nil)
  47
  48 (deffoo nnregistry-open-server (server &optional defs)
  49   (eq gnus-registry-install t))
  50
  51 (defvar nnregistry-within-nnregistry nil)
  52
  53 (deffoo nnregistry-request-article (id &optional group server buffer)
  54   (and (not nnregistry-within-nnregistry)
  55        (let* ((nnregistry-within-nnregistry t)
  56               (group (gnus-registry-fetch-group id))
  57               (gnus-override-method nil))
  58          (message "nnregistry: requesting article `%s' in group `%s'"
  59                   id group)
  60          (and group
  61               (gnus-check-group group)
  62               (gnus-request-article id group buffer)))))
  63
  64 (provide 'nnregistry)
  65
  66 ;;; nnregistry.el ends here