;;; rfc1843.el --- HZ (rfc1843) decoding
-;; Copyright (c) 1998,1999 by Shenghuo Zhu <zsh@cs.rochester.edu>
+
+;; Copyright (C) 1998-2015 Free Software Foundation, Inc.
;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
-;; Keywords: news HZ
+;; Keywords: news HZ HZ+ mail i18n
-;; This file is a part of GNU Emacs, but the same permissions apply.
+;; 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 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.
+;; 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.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
+(eval-when-compile (require 'cl))
(require 'mm-util)
+(defvar gnus-decode-encoded-word-function)
+(defvar gnus-decode-header-function)
+(defvar gnus-newsgroup-name)
+
(defvar rfc1843-word-regexp
- "~\\({\\([\041-\167][\041-\176]\\| \\)+\\(~}\\|$\\)")
+ "~\\({\\([\041-\167][\041-\176]\\| \\)+\\)\\(~}\\|$\\)")
(defvar rfc1843-word-regexp-strictly
- "~\\({\\([\041-\167][\041-\176]\\)+\\(~}\\|$\\)")
+ "~\\({\\([\041-\167][\041-\176]\\)+\\)\\(~}\\|$\\)")
(defvar rfc1843-hzp-word-regexp
"~\\({\\([\041-\167][\041-\176]\\| \\)+\\|\
-[<>]\\([\041-\175][\041-\176]\\| \\)+\\)\\(~}\\|$\\)")
+\[<>]\\([\041-\175][\041-\176]\\| \\)+\\)\\(~}\\|$\\)")
(defvar rfc1843-hzp-word-regexp-strictly
- "~\\({\\([\041-\167][\041-\176]\\)+\\|\
-[<>]\\([\041-\175][\041-\176]\\)+\\)\\(~}\\|$\\)")
+ "~\\({\\([\041-\167][\041-\176]\\)+\\|\
+\[<>]\\([\041-\175][\041-\176]\\)+\\)\\(~}\\|$\\)")
(defcustom rfc1843-decode-loosely nil
"Loosely check HZ encoding if non-nil.
When it is set non-nil, only buffers or strings with strictly
HZ-encoded are decoded."
:type 'boolean
- :group 'gnus)
+ :group 'mime)
(defcustom rfc1843-decode-hzp t
"HZ+ decoding support if non-nil.
The document of HZ+ 0.78 specification can be found at
ftp://ftp.math.psu.edu/pub/simpson/chinese/hzp/hzp.doc"
:type 'boolean
- :group 'gnus)
+ :group 'mime)
(defcustom rfc1843-newsgroups-regexp "chinese\\|hz"
"Regexp of newsgroups in which might be HZ encoded."
:type 'string
- :group 'gnus)
+ :group 'mime)
(defun rfc1843-decode-region (from to)
"Decode HZ in the region between FROM and TO."
(while (re-search-forward (if rfc1843-decode-hzp
rfc1843-hzp-word-regexp
rfc1843-word-regexp) (point-max) t)
- (setq str (match-string 1))
+ ;;; Text with extents may cause XEmacs crash
+ (setq str (buffer-substring-no-properties
+ (match-beginning 1)
+ (match-end 1)))
(setq firstc (aref str 0))
(insert (mm-decode-coding-string
(rfc1843-decode
(cond ((eq (char-after) ?\n)
(delete-char -1)
(delete-char 1))
- ((eq (char-after) ?~)
- (delete-char 1)))))))))
+ ((eq (char-after) ?~)
+ (delete-char 1)))))))))
(defun rfc1843-decode-string (string)
"Decode HZ STRING and return the results."
(buffer-string))))
(defun rfc1843-decode (word &optional firstc)
- "Decode HZ WORD and return it"
+ "Decode HZ WORD and return it."
(let ((i -1) (s (substring word 0)) v)
(if (or (not firstc) (eq firstc ?{))
(while (< (incf i) (length s))
(aset s (incf i) (+ v (if (< v 63) 64 98))))))
s))
+(autoload 'mail-header-parse-content-type "mail-parse")
+(autoload 'message-narrow-to-head "message")
+(declare-function message-fetch-field "message" (header &optional not-all))
+
(defun rfc1843-decode-article-body ()
- "Decode HZ encoded text in the article body."
- (if (string-match (concat "\\<\\(" rfc1843-newsgroups-regexp "\\)\\>")
- 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 (ignore-errors
- (mail-header-parse-content-type ct)))))
- (if (and ctl (not (string-match "/" (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))))))))
-
-(defvar rfc1843-old-gnus-decode-header-function nil)
+ "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-match "/" (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))))))))
+
(defvar gnus-decode-header-methods)
(defvar gnus-decode-encoded-word-methods)