1 | ;;; mcs-nemacs.el --- MIME charset implementation for Nemacs |
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2 | |
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3 | ;; Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
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4 | |
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5 | ;; Author: MORIOKA Tomohiko <tomo@m17n.org> |
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6 | ;; Keywords: emulation, compatibility, Mule |
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7 | |
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8 | ;; This file is part of APEL (A Portable Emacs Library). |
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9 | |
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10 | ;; This program is free software; you can redistribute it and/or |
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11 | ;; modify it under the terms of the GNU General Public License as |
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12 | ;; published by the Free Software Foundation; either version 2, or (at |
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13 | ;; your option) any later version. |
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14 | |
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15 | ;; This program is distributed in the hope that it will be useful, but |
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16 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | ;; General Public License for more details. |
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19 | |
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20 | ;; You should have received a copy of the GNU General Public License |
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21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
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22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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23 | ;; Boston, MA 02111-1307, USA. |
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24 | |
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25 | ;;; Code: |
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26 | |
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27 | (defvar charsets-mime-charset-alist |
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28 | '(((ascii) . us-ascii))) |
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29 | |
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30 | (defvar default-mime-charset 'iso-2022-jp) |
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31 | |
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32 | (defvar mime-charset-coding-system-alist |
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33 | '((iso-2022-jp . 2) |
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34 | (shift_jis . 1) |
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35 | )) |
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36 | |
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37 | (defsubst lbt-to-string (lbt) |
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38 | (cdr (assq lbt '((nil . nil) |
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39 | (CRLF . "\r\n") |
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40 | (CR . "\r") |
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41 | (dos . "\r\n") |
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42 | (mac . "\r")))) |
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43 | ) |
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44 | |
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45 | (defun mime-charset-to-coding-system (charset) |
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46 | (if (stringp charset) |
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47 | (setq charset (intern (downcase charset))) |
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48 | ) |
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49 | (cdr (assq charset mime-charset-coding-system-alist))) |
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50 | |
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51 | (fset 'mime-charset-p 'mime-charset-to-coding-system) |
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52 | |
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53 | (defun detect-mime-charset-region (start end) |
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54 | "Return MIME charset for region between START and END. |
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55 | \[emu-nemacs.el]" |
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56 | (if (save-excursion |
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57 | (save-restriction |
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58 | (narrow-to-region start end) |
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59 | (goto-char start) |
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60 | (re-search-forward "[\200-\377]" nil t))) |
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61 | default-mime-charset |
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62 | 'us-ascii)) |
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63 | |
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64 | (defun encode-mime-charset-region (start end charset &optional lbt) |
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65 | "Encode the text between START and END as MIME CHARSET. |
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66 | \[emu-nemacs.el]" |
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67 | (let ((cs (mime-charset-to-coding-system charset)) |
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68 | (nl (lbt-to-string lbt))) |
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69 | (and (numberp cs) |
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70 | (or (= cs 3) |
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71 | (save-excursion |
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72 | (save-restriction |
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73 | (narrow-to-region start end) |
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74 | (convert-region-kanji-code start end 3 cs) |
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75 | (if nl |
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76 | (progn |
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77 | (goto-char (point-min)) |
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78 | (while (search-forward "\n" nil t) |
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79 | (replace-match nl))) |
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80 | ))) |
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81 | )))) |
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82 | |
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83 | (defun decode-mime-charset-region (start end charset &optional lbt) |
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84 | "Decode the text between START and END as MIME CHARSET. |
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85 | \[emu-nemacs.el]" |
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86 | (let ((cs (mime-charset-to-coding-system charset)) |
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87 | (nl (lbt-to-string lbt))) |
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88 | (and (numberp cs) |
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89 | (or (= cs 3) |
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90 | (save-excursion |
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91 | (save-restriction |
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92 | (narrow-to-region start end) |
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93 | (convert-region-kanji-code start end cs 3) |
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94 | (if nl |
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95 | (progn |
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96 | (goto-char (point-min)) |
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97 | (while (search-forward nl nil t) |
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98 | (replace-match "\n"))) |
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99 | ))) |
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100 | )))) |
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101 | |
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102 | (defun encode-mime-charset-string (string charset &optional lbt) |
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103 | "Encode the STRING as MIME CHARSET. [emu-nemacs.el]" |
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104 | (with-temp-buffer |
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105 | (insert string) |
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106 | (encode-mime-charset-region (point-min)(point-max) charset lbt) |
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107 | (buffer-string))) |
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108 | |
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109 | (defun decode-mime-charset-string (string charset &optional lbt) |
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110 | "Decode the STRING as MIME CHARSET. [emu-nemacs.el]" |
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111 | (with-temp-buffer |
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112 | (insert string) |
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113 | (decode-mime-charset-region (point-min)(point-max) charset lbt) |
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114 | (buffer-string))) |
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115 | |
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116 | (defun write-region-as-mime-charset (charset start end filename) |
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117 | "Like `write-region', q.v., but code-convert by MIME CHARSET. |
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118 | \[emu-nemacs.el]" |
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119 | (let ((kanji-fileio-code |
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120 | (or (mime-charset-to-coding-system charset) 0))) |
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121 | (write-region start end filename))) |
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122 | |
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123 | |
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124 | ;;; @ end |
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125 | ;;; |
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126 | |
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127 | (require 'product) |
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128 | (product-provide (provide 'mcs-nemacs) (require 'apel-ver)) |
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129 | |
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130 | ;;; mcs-nemacs.el ends here |
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