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emu-mule.el
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emu-mule.el
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;;; emu-mule.el --- emu module for Mule 1.* and Mule 2.*
;; Copyright (C) 1995,1996,1997 MORIOKA Tomohiko
;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Version: $Id$
;; Keywords: emulation, compatibility, Mule
;; This file is part of emu.
;; This program 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.
;; This program 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.
;;; Code:
;;; @ version specific features
;;;
(cond (running-emacs-19
(require 'emu-19)
;; Suggested by SASAKI Osamu <osamu@shuugr.bekkoame.or.jp>
;; (cf. [os2-emacs-ja:78])
(defun fontset-pixel-size (fontset)
(let* ((font (get-font-info
(aref (cdr (get-fontset-info fontset)) 0)))
(open (aref font 4)))
(if (= open 1)
(aref font 5)
(if (= open 0)
(let ((pat (aref font 1)))
(if (string-match "-[0-9]+-" pat)
(string-to-number
(substring
pat (1+ (match-beginning 0)) (1- (match-end 0))))
0)))
)))
)
(running-emacs-18
(require 'emu-18)
(defun make-overlay (beg end &optional buffer type))
(defun overlay-put (overlay prop value))
))
;;; @ character set
;;;
(defalias 'make-char 'make-character)
(defalias 'find-non-ascii-charset-string 'find-charset-string)
(defalias 'find-non-ascii-charset-region 'find-charset-region)
(defalias 'charset-bytes 'char-bytes)
(defalias 'charset-description 'char-description)
(defalias 'charset-registry 'char-registry)
(defalias 'charset-columns 'char-width)
(defalias 'charset-direction 'char-direction)
;;; @ coding system
;;;
(defun encode-coding-region (start end coding-system)
"Encode the text between START and END to CODING-SYSTEM.
\[EMACS 20 emulating function]"
(code-convert-region start end *internal* coding-system)
)
(defun decode-coding-region (start end coding-system)
"Decode the text between START and END which is encoded in CODING-SYSTEM.
\[EMACS 20 emulating function]"
(code-convert-region start end coding-system *internal*)
)
(defun encode-coding-string (str coding-system)
"Encode the STRING to CODING-SYSTEM.
\[EMACS 20 emulating function]"
(code-convert-string str *internal* coding-system)
)
(defun decode-coding-string (str coding-system)
"Decode the string STR which is encoded in CODING-SYSTEM.
\[EMACS 20 emulating function]"
(let ((len (length str))
ret)
(while (and
(< 0 len)
(null
(setq ret
(code-convert-string (substring str 0 len)
coding-system *internal*))
))
(setq len (1- len))
)
(concat ret (substring str len))
))
(defalias 'detect-coding-region 'code-detect-region)
(defalias 'set-buffer-file-coding-system 'set-file-coding-system)
(defmacro as-binary-process (&rest body)
(` (let (selective-display ; Disable ^M to nl translation.
;; Mule
mc-flag
(default-process-coding-system (cons *noconv* *noconv*))
program-coding-system-alist)
(,@ body)
)))
(defmacro as-binary-input-file (&rest body)
(` (let (mc-flag
(file-coding-system-for-read *noconv*)
)
(,@ body)
)))
(defmacro as-binary-output-file (&rest body)
(` (let (mc-flag
(file-coding-system *noconv*)
)
(,@ body)
)))
(defalias 'set-process-input-coding-system 'set-process-coding-system)
;;; @ binary access
;;;
(defun insert-binary-file-contents-literally
(filename &optional visit beg end replace)
"Like `insert-file-contents-literally', q.v., but don't code conversion.
A buffer may be modified in several ways after reading into the buffer due
to advanced Emacs features, such as file-name-handlers, format decoding,
find-file-hooks, etc.
This function ensures that none of these modifications will take place."
(let (mc-flag
(file-coding-system *noconv*)
)
(insert-file-contents-literally filename visit beg end replace)
))
;;; @ MIME charset
;;;
(defun encode-mime-charset-region (start end charset)
"Encode the text between START and END as MIME CHARSET."
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
(code-convert start end *internal* cs)
)))
(defun decode-mime-charset-region (start end charset)
"Decode the text between START and END as MIME CHARSET."
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
(code-convert start end cs *internal*)
)))
(defun encode-mime-charset-string (string charset)
"Encode the STRING as MIME CHARSET."
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
(code-convert-string string *internal* cs)
string)))
(defun decode-mime-charset-string (string charset)
"Decode the STRING which is encoded in MIME CHARSET."
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
(decode-coding-string string cs)
string)))
;;; @@ to coding-system
;;;
(defvar mime-charset-coding-system-alist
'((iso-8859-1 . *ctext*)
(x-ctext . *ctext*)
(gb2312 . *euc-china*)
(koi8-r . *koi8*)
(iso-2022-jp-2 . *iso-2022-ss2-7*)
(x-iso-2022-jp-2 . *iso-2022-ss2-7*)
(shift_jis . *sjis*)
(x-shiftjis . *sjis*)
))
(defun mime-charset-to-coding-system (charset &optional lbt)
(if (stringp charset)
(setq charset (intern (downcase charset)))
)
(let ((cs
(or (cdr (assq charset mime-charset-coding-system-alist))
(let ((cs (intern (concat "*" (symbol-name charset) "*"))))
(and (coding-system-p cs) cs)
))))
(if (or (null lbt)
(null cs))
cs
(intern (concat (symbol-name cs) (symbol-name lbt)))
)))
;;; @@ detection
;;;
(defvar charsets-mime-charset-alist
(let ((alist
'(((lc-ascii) . 'us-ascii)
((lc-ascii lc-ltn1) . 'iso-8859-1)
((lc-ascii lc-ltn2) . 'iso-8859-2)
((lc-ascii lc-ltn3) . 'iso-8859-3)
((lc-ascii lc-ltn4) . 'iso-8859-4)
;;; ((lc-ascii lc-crl) . 'iso-8859-5)
((lc-ascii lc-crl) . 'koi8-r)
((lc-ascii lc-arb) . 'iso-8859-6)
((lc-ascii lc-grk) . 'iso-8859-7)
((lc-ascii lc-hbw) . 'iso-8859-8)
((lc-ascii lc-ltn5) . 'iso-8859-9)
((lc-ascii lc-roman lc-jpold lc-jp) . 'iso-2022-jp)
((lc-ascii lc-kr) . 'euc-kr)
((lc-ascii lc-cn) . 'gb2312)
((lc-ascii lc-big5-1 lc-big5-2) . 'big5)
((lc-ascii lc-roman lc-ltn1 lc-grk
lc-jpold lc-cn lc-jp lc-kr
lc-jp2) . 'iso-2022-jp-2)
((lc-ascii lc-roman lc-ltn1 lc-grk
lc-jpold lc-cn lc-jp lc-kr lc-jp2
lc-cns1 lc-cns2) . 'iso-2022-int-1)
((lc-ascii lc-roman
lc-ltn1 lc-ltn2 lc-crl lc-grk
lc-jpold lc-cn lc-jp lc-kr lc-jp2
lc-cns1 lc-cns2 lc-cns3 lc-cns4
lc-cns5 lc-cns6 lc-cns7) . 'iso-2022-int-1)
))
dest)
(while alist
(catch 'not-found
(let ((pair (car alist)))
(setq dest
(cons (mapcar (function
(lambda (cs)
(if (boundp cs)
(symbol-value cs)
(throw 'not-found nil)
)))
(car pair))
(cdr pair)))))
(setq alist (cdr alist))))
)
(defvar default-mime-charset 'x-ctext
"Default value of MIME-charset.
It is used when MIME-charset is not specified.
It must be symbol.")
(defun detect-mime-charset-region (start end)
"Return MIME charset for region between START and END."
(charsets-to-mime-charset
(cons lc-ascii (find-charset-region start end))))
;;; @ character
;;;
(defalias 'char-charset 'char-leading-char)
(defalias 'char-length 'char-bytes)
(defalias 'char-columns 'char-width)
;;; @ string
;;;
(defalias 'string-columns 'string-width)
(defalias 'string-to-int-list 'string-to-char-list)
(or (fboundp 'truncate-string)
;;; Imported from Mule-2.3
(defun truncate-string (str width &optional start-column)
"Truncate STR to fit in WIDTH columns.
Optional non-nil arg START-COLUMN specifies the starting column.
\[emu-mule.el; Mule 2.3 emulating function]"
(or start-column
(setq start-column 0))
(let ((max-width (string-width str))
(len (length str))
(from 0)
(column 0)
to-prev to ch)
(if (>= width max-width)
(setq width max-width))
(if (>= start-column width)
""
(while (< column start-column)
(setq ch (aref str from)
column (+ column (char-width ch))
from (+ from (char-bytes ch))))
(if (< width max-width)
(progn
(setq to from)
(while (<= column width)
(setq ch (aref str to)
column (+ column (char-width ch))
to-prev to
to (+ to (char-bytes ch))))
(setq to to-prev)))
(substring str from to))))
;;;
)
;;; @ regulation
;;;
(defun regulate-latin-char (chr)
(cond ((and (<= ?$B#A(B chr)(<= chr ?$B#Z(B))
(+ (- chr ?$B#A(B) ?A)
)
((and (<= ?$B#a(B chr)(<= chr ?$B#z(B))
(+ (- chr ?$B#a(B) ?a)
)
((eq chr ?$B!%(B) ?.)
((eq chr ?$B!$(B) ?,)
(t chr)
))
(defun regulate-latin-string (str)
(let ((len (length str))
(i 0)
chr (dest ""))
(while (< i len)
(setq chr (sref str i))
(setq dest (concat dest
(char-to-string (regulate-latin-char chr))))
(setq i (+ i (char-bytes chr)))
)
dest))
;;; @ end
;;;
(provide 'emu-mule)
;;; emu-mule.el ends here