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;;; gnus-rfc1843.el --- HZ (rfc1843) decoding interface functions for Gnus -*- lexical-binding: t; -*-
;; Copyright (C) 1998-2022 Free Software Foundation, Inc.
;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
;; Keywords: news HZ HZ+ mail i18n
;; 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 3 of the License, 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. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Usage:
;; (require 'gnus-rfc1843)
;; (rfc1843-gnus-setup)
;;; Code:
(require 'rfc1843)
(require 'gnus-sum)
(require 'gnus-art)
(require 'message)
(defun rfc1843-decode-article-body ()
"Decode HZ encoded text in the article body."
(if (string-match (concat "\\<\\(" rfc1843-newsgroups-regexp "\\)\\>")
(or gnus-newsgroup-name ""))
(save-excursion
(save-restriction
(message-narrow-to-head)
(let* ((inhibit-point-motion-hooks t)
(case-fold-search t)
(ct (message-fetch-field "Content-Type" t))
(ctl (and ct (mail-header-parse-content-type ct))))
(if (and ctl (not (string-search "/" (car ctl))))
(setq ctl nil))
(goto-char (point-max))
(widen)
(forward-line 1)
(narrow-to-region (point) (point-max))
(when (or (not ctl)
(equal (car ctl) "text/plain"))
(rfc1843-decode-region (point) (point-max))))))))
(defun rfc1843-gnus-setup ()
"Setup HZ decoding for Gnus."
(add-hook 'gnus-article-decode-hook #'rfc1843-decode-article-body t)
(setq gnus-decode-encoded-word-function
#'gnus-multi-decode-encoded-word-string
gnus-decode-header-function
#'gnus-multi-decode-header
gnus-decode-encoded-word-methods
(nconc gnus-decode-encoded-word-methods
(list
(cons (concat "\\<\\(" rfc1843-newsgroups-regexp "\\)\\>")
'rfc1843-decode-string)))
gnus-decode-header-methods
(nconc gnus-decode-header-methods
(list
(cons (concat "\\<\\(" rfc1843-newsgroups-regexp "\\)\\>")
'rfc1843-decode-region)))))
(provide 'gnus-rfc1843)
;;; gnus-rfc1843.el ends here
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