SGI Freeware 1999 August/SGI Freeware 1999 August.iso/dist/fw_xemacs.idb/usr/freeware/lib/xemacs-20.4/lisp/apel/emu-mule.el.z/emu-mule.el

Text File | 1998-05-21 | 9.6 KB | 365 lines

;;; emu-mule.el --- emu module for Mule 1.* and Mule 2.*

;; Copyright (C) 1995,1996,1997 MORIOKA Tomohiko

;; Author: MORIOKA Tomohiko <[e-mail]>
;; Version: $Id: emu-mule.el,v 7.65 1997/11/04 08:01:11 morioka Exp $
;; 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 <[e-mail]>
       ;; (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