code.delx.au - gnu-emacs/blob - lisp/language/english.el

   1 ;;; english.el --- English support
   2
   3 ;; Copyright (C) 1997 Free Software Foundation, Inc.
   4 ;; Copyright (C) 1997 Electrotechnical Laboratory, JAPAN.
   5
   6 ;; Keywords: multibyte character, character set, syntax, category
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; We need nothing special to support English on Emacs.  Selecting
  28 ;; English as a language environment is one of the ways to reset
  29 ;; various multilingual environment to the original settting.
  30
  31 ;;; Code
  32
  33 (defun setup-english-environment ()
  34   "Reset multilingual environment of Emacs to the default status.
  35 The default status is as follows.
  36
  37   The default value of enable-multibyte-characters is t.
  38
  39   The default value of buffer-file-coding-system is iso-8859-1.
  40   The coding system for terminal output is nil.
  41   The coding system for keyboard input is nil.
  42
  43   The order of priorities of coding categories and the coding system
  44   bound to each category are as follows
  45         coding category                 coding system
  46         --------------------------------------------------
  47         coding-category-iso-7           iso-2022-7
  48         coding-category-iso-8-2         iso-8859-1
  49         coding-category-iso-8-1         iso-8859-1
  50         coding-category-iso-else        iso-8859-1
  51         coding-category-internal        internal
  52         coding-category-binary          no-conversion
  53         coding-category-sjis            sjis
  54         coding-category-big5            big5
  55 "
  56   (interactive)
  57   (setq-default enable-multibyte-characters t)
  58   (if (local-variable-p 'enable-multibyte-characters)
  59       (setq enable-multibyte-characters t))
  60
  61   (setq coding-category-internal        'internal
  62         coding-category-iso-7           'iso-2022-7
  63         coding-category-iso-8-1         'iso-8859-1
  64         coding-category-iso-8-2         'iso-8859-1
  65         coding-category-iso-else        'iso-8859-1
  66         coding-category-sjis            'sjis
  67         coding-category-big5            'big5
  68         coding-category-binary          'no-conversion)
  69
  70   (set-coding-priority
  71    '(coding-category-iso-7
  72      coding-category-iso-8-2
  73      coding-category-iso-8-1
  74      coding-category-iso-else
  75      coding-category-internal
  76      coding-category-binary
  77      coding-category-sjis
  78      coding-category-big5))
  79
  80   (setq-default buffer-file-coding-system 'iso-8859-1)
  81   (set-terminal-coding-system nil)
  82   (set-keyboard-coding-system nil)
  83
  84   (setq sendmail-coding-system nil
  85         rmail-file-coding-system nil)
  86   )
  87
  88 (defun describe-english-support ()
  89   "Describe how Emacs support English."
  90   (interactive)
  91   (describe-language-support-internal "English"))
  92
  93 (set-language-info-alist
  94  "English" '((setup-function . setup-english-environment)
  95              (describe-function . describe-english-support)
  96              (tutorial . "TUTORIAL")
  97              (charset . (ascii))
  98              (sample-text . "Hello!, Hi!, How are you?")
  99              (documentation . "\
 100 There's nothing special you should care to handle English in Emacs.
 101 You can use English both with enable-multibyte-characters t and nil.")
 102              ))
 103
 104 (register-input-method "English"
 105                        '("quail-dvorak" quail-use-package "quail/latin"))
 106
 107 ;;; english.el ends here