+++ /dev/null
-;;; gnus-idna.el --- Internationalized domain names support for Gnus.
-
-;; Copyright (C) 2003 Free Software Foundation, Inc.
-
-;; Author: Simon Josefsson
-;; Keywords: news, mail
-
-;; 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 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.
-
-;;; Commentary:
-
-;; This package implement crude support for internationalized domain
-;; names in Gnus.
-
-;; Theory of Operation:
-
-;; RFC 2822 RHS's inside the From:, To:, and CC: headers are encoded
-;; using IDNA ToASCII() when you send mail using Message. The hook
-;; used is message-send-hook.
-;;
-;; For incoming articles, when QP in headers are decoded (i.e., when
-;; gnus-article-decode-hook is invoked), it searches for "xn--"
-;; prefixes and decode them if they are found inside (heuristically
-;; determined) RHS in From:, To: and Cc:, using IDNA ToUnicode().
-
-;; Usage:
-
-;; You need to install GNU Libidn (0.1.11 or later) and make sure the
-;; idna.el installed by it is found by emacs.
-
-;; If you use an older Gnus, you may need to put the following in your
-;; init scripts too, but keep in mind that most older Gnuses either
-;; doesn't have these hooks or are buggy in other regards so it
-;; doesn't work anyway. (The window of Gnus versions that this works
-;; on is a few weeks during the Oort CVS in winter 2003.) Update to a
-;; recent Gnus instead, then you don't have to do anything.
-
-;; (add-hook 'message-send-hook 'message-idna-to-ascii-rhs)
-;; (add-hook 'gnus-article-decode-hook 'gnus-idna-to-unicode-rhs 'append)
-
-;; Revision history:
-
-;; 2003-02-26 Initial release
-;;
-;; 2003-03-19 Cleanup. Fixes a bug that may corrupt outgoing mail if
-;; it contains From:, To: or Cc: headers in the body.
-
-;;; Code:
-
-(require 'gnus)
-(require 'gnus-util)
-(require 'rfc822)
-(autoload 'idna-to-ascii "idna")
-(autoload 'idna-to-unicode "idna")
-
-(defcustom message-use-idna 'ask
- "Whether to encode non-ASCII in domain names into ASCII according to IDNA."
- :type '(choice (const :tag "Ask" ask)
- (const :tag "Never" nil)
- (const :tag "Always" t)))
-
-(defun message-idna-inside-rhs-p ()
- "Return t iff point is inside a RHS (heuristically).
-Only works properly if header contains mailbox-list or address-list.
-I.e., calling it on a Subject: header is useless."
- (if (re-search-backward
- "[\\\n\r\t ]" (save-excursion (search-backward "@" nil t)) t)
- ;; whitespace between @ and point
- nil
- (let ((dquote 1) (paren 1))
- (while (save-excursion (re-search-backward "[^\\]\"" nil t dquote))
- (incf dquote))
- (while (save-excursion (re-search-backward "[^\\]\(" nil t paren))
- (incf paren))
- (and (= (% dquote 2) 1) (= (% paren 2) 1)))))
-
-(defun message-idna-to-ascii-rhs-1 (header)
- "Interactively potentially IDNA encode domain names in HEADER."
- (let (rhs ace start end startpos endpos)
- (goto-char (point-min))
- (setq start (re-search-forward (concat "^" header) nil t)
- end (or (save-excursion (re-search-forward "^[ \t]" nil t))
- (point-max)))
- (when (and start end)
- (while (re-search-forward "@\\([^ \t\r\n>]+\\)" end t)
- (setq rhs (match-string-no-properties 1)
- startpos (match-beginning 1)
- endpos (match-end 1))
- (when (save-match-data
- (and (message-idna-inside-rhs-p)
- (setq ace (idna-to-ascii rhs))
- (not (string= rhs ace))
- (if (eq message-use-idna 'ask)
- (unwind-protect
- (progn
- (replace-highlight startpos endpos)
- (y-or-n-p
- (format "Replace with `%s'? " ace)))
- (message "")
- (replace-dehighlight))
- message-use-idna)))
- (replace-match (concat "@" ace)))))))
-
-;;;###autoload
-(defun message-idna-to-ascii-rhs ()
- "Possibly IDNA encode non-ASCII domain names in From:, To: and Cc: headers.
-See `message-idna-encode'."
- (interactive)
- (when (condition-case nil (require 'idna) (file-error))
- (save-excursion
- (save-restriction
- (message-narrow-to-head)
- (message-idna-to-ascii-rhs-1 "From")
- (message-idna-to-ascii-rhs-1 "To")
- (message-idna-to-ascii-rhs-1 "Cc")))))
-
-;;;###autoload
-(defun gnus-idna-to-unicode-rhs ()
- "Decode IDNA strings in RHS in From:, To: and Cc: headers in current buffer."
- (when (condition-case nil (require 'idna) (file-error))
- (let ((inhibit-point-motion-hooks t)
- buffer-read-only)
- (article-narrow-to-head)
- (goto-char (point-min))
- (while (re-search-forward "\\(xn--.*\\)[ \t\n\r,>]" nil t)
- (let (ace unicode)
- (when (save-match-data
- (and (setq ace (match-string 1))
- (save-excursion (and (re-search-backward "^[^ \t]" nil t)
- (looking-at "From\\|To\\|Cc")))
- (save-excursion (backward-char)
- (message-idna-inside-rhs-p))
- (setq unicode (idna-to-unicode ace))))
- (unless (string= ace unicode)
- (replace-match unicode nil nil nil 1))))))))
-
-(provide 'gnus-idna)
-
-;; gnus-idna.el ends here
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