HCoop / bpt / emacs.git / blame
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1 | ;;; gnus-mule.el --- Provide backward compatibility function to GNUS |
| 2 | ||
| 3 | ;; Copyright (C) 1995,1997 Free Software Foundation, Inc. | |
| 4 | ;; Copyright (C) 1995, 2000 Electrotechnical Laboratory, JAPAN. | |
| 5 | ||
| fcb282a5 DL |
6 | ;; Maintainer: FSF |
| 7 | ;; Keywords: news, i18n | |
| 33ecc295 KH |
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 | ;; This file provides the function `gnus-mule-add-group' for backward | |
| 29 | ;; compatibility with old version of Gnus included in Emacs 20. | |
| 30 | ||
| 31 | (require 'gnus-sum) | |
| 32 | ||
| 33 | ;;;###autoload | |
| 34 | (defun gnus-mule-add-group (name coding-system) | |
| 35 | "Specify that articles of news group NAME are encoded in CODING-SYSTEM. | |
| 36 | All news groups deeper than NAME are also the target. | |
| 37 | If CODING-SYSTEM is a cons, the car part is used and the cdr | |
| 38 | part is ignored. | |
| 39 | ||
| 40 | This function exists for backward comaptibility with Emacs 20. It is | |
| 41 | recommended to customize the variable `gnus-group-charset-alist' | |
| 42 | rather than using this function." | |
| 43 | (if (consp coding-system) | |
| 44 | ;; Ignore the cdr part because now Gnus can't use different | |
| 45 | ;; coding systems for encoding and decoding. | |
| 46 | (setq coding-system (car coding-system))) | |
| 47 | (let ((tail gnus-group-charset-alist) | |
| 48 | (prev nil) | |
| 49 | (pattern (concat "^" (regexp-quote name)))) | |
| 50 | ;; Check entries of `gnus-group-charset-alist' if they match NAME. | |
| 51 | (while (not (string-match (car (car tail)) name)) | |
| 52 | (setq prev tail tail (cdr tail))) | |
| 53 | (if tail | |
| 54 | ;; A matching entry was found. | |
| 55 | (if (string= pattern (car (car tail))) | |
| 56 | ;; We can modify this entry. | |
| 57 | (setcar (cdr (car tail)) coding-system) | |
| 58 | ;; We must add a new entry before this. | |
| 59 | (if prev | |
| 60 | (setcdr prev (cons (list pattern coding-system) | |
| 61 | (cdr prev))) | |
| 62 | (setq gnus-group-charset-alist | |
| 63 | (cons (list pattern coding-system) | |
| 64 | gnus-group-charset-alist)))) | |
| 65 | ;; We must prepend a new entry. | |
| 66 | (setq gnus-group-charset-alist | |
| 67 | (cons (list pattern coding-system) | |
| 68 | gnus-group-charset-alist))))) | |
| 69 | ||
| 70 | (provide 'gnus-mule) | |
| 71 | ||
| 72 | ;; gnus-mule.el ends here |