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72 lines
2.6 KiB
EmacsLisp
72 lines
2.6 KiB
EmacsLisp
;;; gnus-mule.el --- Provide backward compatibility function to GNUS
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;; Copyright (C) 1995,1997 Free Software Foundation, Inc.
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;; Copyright (C) 1995, 2000 Electrotechnical Laboratory, JAPAN.
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;; Keywords: gnus, mule
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; This file provides the function `gnus-mule-add-group' for backward
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;; compatibility with old version of Gnus included in Emacs 20.
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(require 'gnus-sum)
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;;;###autoload
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(defun gnus-mule-add-group (name coding-system)
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"Specify that articles of news group NAME are encoded in CODING-SYSTEM.
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All news groups deeper than NAME are also the target.
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If CODING-SYSTEM is a cons, the car part is used and the cdr
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part is ignored.
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This function exists for backward comaptibility with Emacs 20. It is
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recommended to customize the variable `gnus-group-charset-alist'
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rather than using this function."
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(if (consp coding-system)
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;; Ignore the cdr part because now Gnus can't use different
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;; coding systems for encoding and decoding.
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(setq coding-system (car coding-system)))
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(let ((tail gnus-group-charset-alist)
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(prev nil)
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(pattern (concat "^" (regexp-quote name))))
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;; Check entries of `gnus-group-charset-alist' if they match NAME.
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(while (not (string-match (car (car tail)) name))
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(setq prev tail tail (cdr tail)))
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(if tail
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;; A matching entry was found.
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(if (string= pattern (car (car tail)))
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;; We can modify this entry.
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(setcar (cdr (car tail)) coding-system)
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;; We must add a new entry before this.
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(if prev
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(setcdr prev (cons (list pattern coding-system)
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(cdr prev)))
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(setq gnus-group-charset-alist
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(cons (list pattern coding-system)
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gnus-group-charset-alist))))
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;; We must prepend a new entry.
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(setq gnus-group-charset-alist
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(cons (list pattern coding-system)
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gnus-group-charset-alist)))))
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(provide 'gnus-mule)
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;; gnus-mule.el ends here
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