188 lines
6.5 KiB
EmacsLisp
188 lines
6.5 KiB
EmacsLisp
;;; mcs-e20.el --- MIME charset implementation for Emacs 20.1 and 20.2
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;; Copyright (C) 1996,1997,1998,1999,2000 Free Software Foundation, Inc.
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;; Author: MORIOKA Tomohiko <tomo@m17n.org>
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;; Keywords: emulation, compatibility, Mule
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;; This file is part of APEL (A Portable Emacs Library).
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or (at
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;; your option) any later version.
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;; This program is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; 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., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; This module requires Emacs 20.1 and 20.2.
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;;; Code:
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(require 'pces)
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(eval-when-compile (require 'static))
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(defsubst encode-mime-charset-region (start end charset &optional lbt)
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"Encode the text between START and END as MIME CHARSET."
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(let (cs)
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(if (and enable-multibyte-characters
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(setq cs (mime-charset-to-coding-system charset lbt)))
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(encode-coding-region start end cs)
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)))
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(defsubst decode-mime-charset-region (start end charset &optional lbt)
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"Decode the text between START and END as MIME CHARSET."
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(let (cs)
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(if (and enable-multibyte-characters
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(setq cs (mime-charset-to-coding-system charset lbt)))
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(decode-coding-region start end cs)
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)))
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(defsubst encode-mime-charset-string (string charset &optional lbt)
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"Encode the STRING as MIME CHARSET."
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(let (cs)
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(if (and enable-multibyte-characters
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(setq cs (mime-charset-to-coding-system charset lbt)))
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(encode-coding-string string cs)
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string)))
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(defsubst decode-mime-charset-string (string charset &optional lbt)
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"Decode the STRING as MIME CHARSET."
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(let (cs)
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(if (and enable-multibyte-characters
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(setq cs (mime-charset-to-coding-system charset lbt)))
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(decode-coding-string string cs)
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string)))
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(defvar charsets-mime-charset-alist
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(delq
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nil
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`(((ascii) . us-ascii)
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((ascii latin-iso8859-1) . iso-8859-1)
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((ascii latin-iso8859-2) . iso-8859-2)
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((ascii latin-iso8859-3) . iso-8859-3)
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((ascii latin-iso8859-4) . iso-8859-4)
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;;((ascii cyrillic-iso8859-5) . iso-8859-5)
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((ascii cyrillic-iso8859-5) . koi8-r)
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((ascii arabic-iso8859-6) . iso-8859-6)
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((ascii greek-iso8859-7) . iso-8859-7)
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((ascii hebrew-iso8859-8) . iso-8859-8)
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((ascii latin-iso8859-9) . iso-8859-9)
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,(if (find-coding-system 'iso-8859-14)
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'((ascii latin-iso8859-14) . iso-8859-14))
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,(if (find-coding-system 'iso-8859-15)
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'((ascii latin-iso8859-15) . iso-8859-15))
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((ascii latin-jisx0201
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japanese-jisx0208-1978 japanese-jisx0208) . iso-2022-jp)
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((ascii latin-jisx0201
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katakana-jisx0201 japanese-jisx0208) . shift_jis)
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((ascii korean-ksc5601) . euc-kr)
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((ascii chinese-gb2312) . gb2312)
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((ascii chinese-big5-1 chinese-big5-2) . big5)
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((ascii thai-tis620 composition) . tis-620)
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((ascii latin-iso8859-1 greek-iso8859-7
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latin-jisx0201 japanese-jisx0208-1978
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chinese-gb2312 japanese-jisx0208
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korean-ksc5601 japanese-jisx0212) . iso-2022-jp-2)
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;;((ascii latin-iso8859-1 greek-iso8859-7
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;; latin-jisx0201 japanese-jisx0208-1978
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;; chinese-gb2312 japanese-jisx0208
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;; korean-ksc5601 japanese-jisx0212
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;; chinese-cns11643-1 chinese-cns11643-2) . iso-2022-int-1)
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;;((ascii latin-iso8859-1 latin-iso8859-2
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;; cyrillic-iso8859-5 greek-iso8859-7
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;; latin-jisx0201 japanese-jisx0208-1978
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;; chinese-gb2312 japanese-jisx0208
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;; korean-ksc5601 japanese-jisx0212
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;; chinese-cns11643-1 chinese-cns11643-2
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;; chinese-cns11643-3 chinese-cns11643-4
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;; chinese-cns11643-5 chinese-cns11643-6
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;; chinese-cns11643-7) . iso-2022-int-1)
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)))
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(defun-maybe coding-system-get (coding-system prop)
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"Extract a value from CODING-SYSTEM's property list for property PROP."
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(plist-get (coding-system-plist coding-system) prop)
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)
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(defun coding-system-to-mime-charset (coding-system)
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"Convert CODING-SYSTEM to a MIME-charset.
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Return nil if corresponding MIME-charset is not found."
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(or (car (rassq coding-system mime-charset-coding-system-alist))
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(coding-system-get coding-system 'mime-charset)
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))
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(defun-maybe-cond mime-charset-list ()
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"Return a list of all existing MIME-charset."
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((boundp 'coding-system-list)
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(let ((dest (mapcar (function car) mime-charset-coding-system-alist))
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(rest coding-system-list)
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cs)
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(while rest
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(setq cs (car rest))
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(unless (rassq cs mime-charset-coding-system-alist)
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(if (setq cs (coding-system-get cs 'mime-charset))
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(or (rassq cs mime-charset-coding-system-alist)
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(memq cs dest)
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(setq dest (cons cs dest))
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)))
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(setq rest (cdr rest)))
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dest))
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(t
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(let ((dest (mapcar (function car) mime-charset-coding-system-alist))
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(rest (coding-system-list))
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cs)
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(while rest
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(setq cs (car rest))
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(unless (rassq cs mime-charset-coding-system-alist)
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(when (setq cs (or (coding-system-get cs 'mime-charset)
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(and
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(setq cs (aref
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(coding-system-get cs 'coding-spec)
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2))
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(string-match "(MIME:[ \t]*\\([^,)]+\\)" cs)
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(match-string 1 cs))))
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(setq cs (intern (downcase cs)))
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(or (rassq cs mime-charset-coding-system-alist)
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(memq cs dest)
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(setq dest (cons cs dest))
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)))
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(setq rest (cdr rest)))
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dest)
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))
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(static-when (and (string= (decode-coding-string "\e.A\eN!" 'ctext) "\eN!")
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(or (not (find-coding-system 'x-ctext))
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(coding-system-get 'x-ctext 'apel)))
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(unless (find-coding-system 'x-ctext)
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(make-coding-system
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'x-ctext 2 ?x
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"Compound text based generic encoding for decoding unknown messages."
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'((ascii t) (latin-iso8859-1 t) t t
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nil ascii-eol ascii-cntl nil locking-shift single-shift nil nil nil
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init-bol nil nil)
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'((safe-charsets . t)
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(mime-charset . x-ctext)))
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(coding-system-put 'x-ctext 'apel t)
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))
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;;; @ end
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;;;
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(require 'product)
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(product-provide (provide 'mcs-e20) (require 'apel-ver))
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;;; mcs-e20.el ends here
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