;;; chise-tex.el --- Coding-system based chise2otf like tool

;; Copyright (C) 2004 MORIOKA Tomohiko

;; Author: MORIOKA Tomohiko <tomo@kanji.zinbun.kyoto-u.ac.jp>
;; Keywords: OTF package, pTeX, CHISE, Multiscript, Multilingual

;; This file is a part of Omega/CHISE.

;; 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 this program; see the file COPYING.  If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Code:

(defvar chise-tex-coded-charset-expression-alist
  '((=ucs-hangul "UCShang"	4 X)
    (=ucs@gb	"UCSgb"		4 X)
    (=ucs@jis	"UCSjis"	4 X)
    (=ucs@jis/2000 "UCSjis"	4 X)
    (=ucs@ks	"UCSks"		4 X)
    (=gt-pj-1	"GTpj1"		4 X)
    (=gt-pj-2	"GTpj2"		4 X)
    (=gt-pj-3	"GTpj3"		4 X)
    (=gt-pj-4	"GTpj4"		4 X)
    (=gt-pj-5	"GTpj5"		4 X)
    (=gt-pj-6	"GTpj6"		4 X)
    (=gt-pj-7	"GTpj7"		4 X)
    (=gt-pj-8	"GTpj8"		4 X)
    (=gt-pj-9	"GTpj9"		4 X)
    (=gt-pj-10	"GTpj10"	4 X)
    (=gt-pj-11	"GTpj11"	4 X)
    (=ucs@cns	"UCScns"	4 X)))

(defun chise-tex-encode-region-for-gb (start end)
  (interactive "r")
  (save-excursion
    (save-restriction
      (narrow-to-region start end)
      (goto-char start)
      (let (chr ret rest spec)
	(while (and (skip-chars-forward "\x00-\xFF")
		    (not (eobp)))
	  (setq chr (char-after))
	  (cond ((memq chr '(?$(O#@(B))
		 (delete-char)
		 (insert (format "\\UCSjis{%04X}"
				 (encode-char chr '=ucs@jis)))
		 )
		((and (setq ret (encode-char chr '=jis-x0208-1983))
		      (< ret #x3021))
		 (forward-char))
                ;; ((setq ret (encode-char chr '=jis-x0208-1990))
                ;;  (delete-char)
                ;;  (insert (decode-char '=jis-x0208-1983 ret)))
		((catch 'tag
		   (setq rest chise-tex-coded-charset-expression-alist)
		   (while (setq spec (car rest))
		     (if (setq ret (encode-char chr (car spec)))
			 (throw 'tag ret))
		     (setq rest (cdr rest))))
		 (delete-char)
		 ;; (if (eq (char-before) ?$B!T(B)
		 ;;     (insert " "))
		 (insert (format (format "\\%s{%%0%d%s}"
					 (nth 1 spec)
					 (nth 2 spec)
					 (nth 3 spec))
				 ret)))
		(t
		 (forward-char))))))))

(defun chise-tex-encode-region-for-jis (start end)
  (interactive "r")
  (save-excursion
    (save-restriction
      (narrow-to-region start end)
      (goto-char start)
      (let (chr ret rest spec)
	(while (and (skip-chars-forward "\x00-\xFF")
		    (not (eobp)))
	  (setq chr (char-after))
          (cond ((encode-char chr '=jis-x0208-1983)
		 (forward-char))
                ;; ((setq ret (encode-char chr '=jis-x0208-1990))
                ;;  (delete-char)
                ;;  (insert (decode-char '=jis-x0208-1983 ret)))
		((and (or (encode-char chr '=jis-x0213-1-2000)
			  (encode-char chr '=jis-x0213-2-2000))
		      (setq ret (or (encode-char chr '=ucs@jis/2000)
				    (encode-char chr '=ucs@jis/fw))))
		 (delete-char)
		 ;; (if (eq (char-before) ?$B!T(B)
		 ;;     (insert " "))
		 (insert (format "\\UCSjis{%04X}" ret)))
		((setq ret (encode-char chr '=ucs-hangul))
		 (delete-char)
		 ;; (if (eq (char-before) ?$B!T(B)
		 ;;     (insert " "))
		 (insert (format "\\UCSks{%04X}" ret)))
		((eq chr ?\u2022)
		 (delete-char)
		 (insert "\\textbullet{}"))
		((eq chr ?\u0294)
		 (delete-char)
		 (insert "\\UCSjis{0294}"))
		((and (encode-char chr '=ucs@jp)
		      (setq ret (char-representative-of-domain chr 'gb))
		      (setq ret (encode-char ret '=ucs@gb)))
		 (delete-char)
		 ;; (if (eq (char-before) ?$B!T(B)
		 ;;     (insert " "))
		 (insert (format "\\UCSgb{%04X}" ret)))
		((catch 'tag
		   (setq rest chise-tex-coded-charset-expression-alist)
		   (while (setq spec (car rest))
		     (if (setq ret (encode-char chr (car spec)))
			 (throw 'tag ret))
		     (setq rest (cdr rest))))
		 (delete-char)
		 ;; (if (eq (char-before) ?$B!T(B)
		 ;;     (insert " "))
		 (insert (format (format "\\%s{%%0%d%s}"
					 (nth 1 spec)
					 (nth 2 spec)
					 (nth 3 spec))
				 ret)))
		(t
		 (forward-char))))))))

(defun chise-tex-decode-region (start end)
  (interactive "r")
  (save-excursion
    (save-restriction
      (narrow-to-region start end)
      (goto-char start)
      (let (macro code ret me rest spec)
	(while (re-search-forward "\\\\\\([a-zA-Z0-9]+\\){\\([0-9A-Fa-f]+\\)}"
				  nil t)
	  (setq macro (match-string 1)
		code (match-string 2)
		me (match-end 0))
	  (if (and (catch 'tag
		     (setq rest chise-tex-coded-charset-expression-alist)
		     (while (setq spec (car rest))
		       (if (string= (nth 1 spec) macro)
			   (throw 'tag spec))
		       (setq rest (cdr rest))))
		   (setq ret (decode-char (car spec)
					  (string-to-int
					   code
					   (if (eq (nth 3 spec) 'X)
					       16)))))
	      (progn
		(delete-region (match-beginning 0)(match-end 0))
		(insert ret))
	    (goto-char me)))))))

(make-coding-system
 'iso-2022-jp-tex-gb 'iso2022
 "ISO-2022-JP with TeX representation for GB fonts."
 '(charset-g0 ascii
   short t
   seven t
   input-charset-conversion ((latin-jisx0201 ascii)
			     (japanese-jisx0208-1978 japanese-jisx0208))
   pre-write-conversion chise-tex-encode-region-for-gb
   post-read-conversion chise-tex-decode-region
   mnemonic "pTeX(GB)/7bit"
   ))

(make-coding-system
 'iso-2022-jp-tex-jis 'iso2022
 "ISO-2022-JP with TeX representation for JIS fonts."
 '(charset-g0 ascii
   short t
   seven t
   input-charset-conversion ((latin-jisx0201 ascii)
			     (japanese-jisx0208-1978 japanese-jisx0208))
   pre-write-conversion chise-tex-encode-region-for-jis
   post-read-conversion chise-tex-decode-region
   mnemonic "pTeX(JIS)/7bit"
   ))


;;; @ End.
;;;

(provide 'chise-tex)

;;; chise-tex.el ends here