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

   1 ;;; english.el --- English support
   2
   3 ;; Copyright (C) 1997 Electrotechnical Laboratory, JAPAN.
   4 ;; Licensed to the Free Software Foundation.
   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 nil.
  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-2022-7bit
  48         coding-category-iso-8-2         iso-latin-1
  49         coding-category-iso-8-1         iso-latin-1
  50         coding-category-iso-7-else      iso-2022-7bit-lock
  51         coding-category-iso-8-else      iso-2022-8bit-ss2
  52         coding-category-emacs-mule      emacs-mule
  53         coding-category-binary          no-conversion
  54         coding-category-sjis            japanese-shift-jis
  55         coding-category-big5            chinese-big5
  56 "
  57   (interactive)
  58   (setq-default enable-multibyte-characters t)
  59
  60   (setq coding-category-iso-7           'iso-2022-7bit
  61         coding-category-iso-8-1         'iso-latin-1
  62         coding-category-iso-8-2         'iso-latin-1
  63         coding-category-iso-7-else      'iso-2022-7bit-lock
  64         coding-category-iso-8-else      'iso-2022-8bit-ss2
  65         coding-category-emacs-mule      'emacs-mule
  66         coding-category-sjis            'japanese-shift-jis
  67         coding-category-big5            'chinese-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-7-else
  75      coding-category-iso-8-else
  76      coding-category-emacs-mule
  77      coding-category-sjis
  78      coding-category-big5
  79      coding-category-binary))
  80
  81   (set-default-coding-systems nil)
  82   (set-terminal-coding-system-internal nil)
  83   (set-keyboard-coding-system-internal nil)
  84
  85   (setq nonascii-insert-offset 0))
  86
  87 (set-language-info-alist
  88  "English" '((setup-function . setup-english-environment)
  89              (tutorial . "TUTORIAL")
  90              (charset . (ascii))
  91              (sample-text . "Hello!, Hi!, How are you?")
  92              (documentation . "\
  93 Nothing special is needed to handle English.")
  94              ))
  95
  96 ;;; english.el ends here