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+;; iso-cvt.el -- translate to ISO 8859-1 from/to net/TeX conventions
+;; Copyright � 1993 Free Software Foundation, Inc.
+;; Was formerly called gm-lingo.el.
+
+;; Author: Michael Gschwind <[email protected]>
+;; Keywords: tex, iso, latin, i18n
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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.
+
+;; GNU Emacs 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Commentary: 
+
+; Calling `iso-german' will turn the net convention f or umlauts ("a etc.) 
+; into ISO latin umlaute for easy reading.
+; hooks change TeX files to Latin-1 for editing and back to TeX sequences 
+; for calling TeX. An alternative is a TeX style that handles 
+; 8 bit ISO files (available on ftp.vlsivie.tuwien.ac.at in /pub/8bit) 
+; - but these files are difficult to transmit ... so while the net is  
+; still @ 7 bit this may be useful
+
+; to do: translate buffer when displaying from GNUS, 
+; use function 'german which does the Right Thing
+;
+; to do: use more general regular expressions for (g)tex2iso tables, to 
+; cover more cases for translation.
+
+;;; Code:
+
+(provide 'iso-cvt)
+
+(defvar iso-spanish-trans-tab
+  '(
+    ("~n" "�")
+    ("\([a-zA-Z]\)#" "\\1�")
+    ("~N" "�")
+    ("\\([-a-zA-Z\"`]\\)\"u" "\\1�")
+    ("\\([-a-zA-Z\"`]\\)\"U" "\\1�")
+    ("\\([-a-zA-Z]\\)'o" "\\1�")
+    ("\\([-a-zA-Z]\\)'O" "\\�")
+    ("\\([-a-zA-Z]\\)'e" "\\1�")
+    ("\\([-a-zA-Z]\\)'E" "\\1�")
+    ("\\([-a-zA-Z]\\)'a" "\\1�")
+    ("\\([-a-zA-Z]\\)'A" "\\1A")
+    ("\\([-a-zA-Z]\\)'i" "\\1�")
+    ("\\([-a-zA-Z]\\)'I" "\\1�")
+    )
+  "Spanish translation table.")
+
+(defun iso-translate-conventions (trans-tab)
+  "Use the translation table argument to translate the current buffer."
+  (interactive)
+  (save-excursion
+    (widen)
+    (goto-char (point-min))
+    (let ((work-tab trans-tab)
+	  (buffer-read-only nil))
+      (while work-tab
+	(save-excursion
+	  (let ((trans-this (car work-tab)))
+	    (while (re-search-forward (car trans-this) nil t)
+	      (replace-match (car (cdr trans-this)) nil nil)))
+	  (setq work-tab (cdr work-tab)))))))
+
+(defun iso-spanish ()
+  "Translate net conventions for Spanish to ISO 8859-1."
+  (interactive)
+  (iso-translate-conventions iso-spanish-trans-tab))
+
+(defvar iso-aggressive-german-trans-tab
+  '(
+    ("\"a" "�")
+    ("\"A" "�")
+    ("\"o" "�")
+    ("\"O" "�")
+    ("\"u" "�")
+    ("\"U" "�")
+    ("\"s" "�")
+    ("\\\\3" "�")
+    )
+  "German translation table. 
+This table uses an aggressive translation approach and may translate 
+erroneously translate too much.")
+
+(defvar iso-conservative-german-trans-tab
+  '(
+    ("\\([-a-zA-Z\"`]\\)\"a" "\\1�")
+    ("\\([-a-zA-Z\"`]\\)\"A" "\\1�")
+    ("\\([-a-zA-Z\"`]\\)\"o" "\\1�")
+    ("\\([-a-zA-Z\"`]\\)\"O" "\\1�")
+    ("\\([-a-zA-Z\"`]\\)\"u" "\\1�")
+    ("\\([-a-zA-Z\"`]\\)\"U" "\\1�")
+    ("\\([-a-zA-Z\"`]\\)\"s" "\\1�")
+    ("\\([-a-zA-Z\"`]\\)\\\\3" "\\1�")
+    )
+  "German translation table.
+This table uses a conservative translation approach and may translate too 
+little.")
+
+
+(defvar iso-german-trans-tab iso-aggressive-german-trans-tab 
+  "Currently active translation table for German.")
+
+(defun iso-german ()
+ "Translate net conventions for German to ISO 8859-1."
+ (interactive)
+ (iso-translate-conventions iso-german-trans-tab))
+ 
+(defvar iso-iso2tex-trans-tab
+  '(
+    ("�" "{\\\\\"a}")
+    ("�" "{\\\\`a}")
+    ("�" "{\\\\'a}")
+    ("�" "{\\\\~a}")
+    ("�" "{\\\\^a}")
+    ("�" "{\\\\\"e}")
+    ("�" "{\\\\`e}")
+    ("�" "{\\\\'e}")
+    ("�" "{\\\\^e}")
+    ("�" "{\\\\\"\\\\i}")
+    ("�" "{\\\\`\\\\i}")
+    ("�" "{\\\\'\\\\i}")
+    ("�" "{\\\\^\\\\i}")
+    ("�" "{\\\\\"o}")
+    ("�" "{\\\\`o}")
+    ("�" "{\\\\'o}")
+    ("�" "{\\\\~o}")
+    ("�" "{\\\\^o}")
+    ("�" "{\\\\\"u}")
+    ("�" "{\\\\`u}")
+    ("�" "{\\\\'u}")
+    ("�" "{\\\\^u}")
+    ("�" "{\\\\\"A}")
+    ("�" "{\\\\`A}")
+    ("�" "{\\\\'A}")
+    ("�" "{\\\\~A}")
+    ("�" "{\\\\^A}")
+    ("�" "{\\\\\"E}")
+    ("�" "{\\\\`E}")
+    ("�" "{\\\\'E}")
+    ("�" "{\\\\^E}")
+    ("�" "{\\\\\"I}")
+    ("�" "{\\\\`I}")
+    ("�" "{\\\\'I}")
+    ("�" "{\\\\^I}")
+    ("�" "{\\\\\"O}")
+    ("�" "{\\\\`O}")
+    ("�" "{\\\\'O}")
+    ("�" "{\\\\~O}")
+    ("�" "{\\\\^O}")
+    ("�" "{\\\\\"U}")
+    ("�" "{\\\\`U}")
+    ("�" "{\\\\'U}")
+    ("�" "{\\\\^U}")
+    ("�" "{\\\\~n}")
+    ("�" "{\\\\~N}")
+    ("�" "{\\\\c c}")
+    ("�" "{\\\\c C}")
+    ("�" "{\\\\ss}")
+    ("�" "{?`}")
+    ("�" "{!`}")
+    )
+  "Translation table for translating ISO 8859-1 characters to TeX sequences.")
+
+
+
+
+(defun iso-iso2tex ()
+ "Translate ISO 8859-1 characters to TeX sequences."
+ (interactive)
+ (iso-translate-conventions iso-iso2tex-trans-tab))
+
+
+(defvar iso-tex2iso-trans-tab
+  '(
+    ("{\\\\\"a}" "�")
+    ("{\\\\`a}" "�")
+    ("{\\\\'a}" "�")
+    ("{\\\\~a}" "�")
+    ("{\\\\^a}" "�")
+    ("{\\\\\"e}" "�")
+    ("{\\\\`e}" "�")
+    ("{\\\\'e}" "�")
+    ("{\\\\^e}" "�")
+    ("{\\\\\"\\\\i}" "�")
+    ("{\\\\`\\\\i}" "�")
+    ("{\\\\'\\\\i}" "�")
+    ("{\\\\^\\\\i}" "�")
+    ("{\\\\\"i}" "�")
+    ("{\\\\`i}" "�")
+    ("{\\\\'i}" "�")
+    ("{\\\\^i}" "�")
+    ("{\\\\\"o}" "�")
+    ("{\\\\`o}" "�")
+    ("{\\\\'o}" "�")
+    ("{\\\\~o}" "�")
+    ("{\\\\^o}" "�")
+    ("{\\\\\"u}" "�")
+    ("{\\\\`u}" "�")
+    ("{\\\\'u}" "�")
+    ("{\\\\^u}" "�")
+    ("{\\\\\"A}" "�")
+    ("{\\\\`A}" "�")
+    ("{\\\\'A}" "�")
+    ("{\\\\~A}" "�")
+    ("{\\\\^A}" "�")
+    ("{\\\\\"E}" "�")
+    ("{\\\\`E}" "�")
+    ("{\\\\'E}" "�")
+    ("{\\\\^E}" "�")
+    ("{\\\\\"I}" "�")
+    ("{\\\\`I}" "�")
+    ("{\\\\'I}" "�")
+    ("{\\\\^I}" "�")
+    ("{\\\\\"O}" "�")
+    ("{\\\\`O}" "�")
+    ("{\\\\'O}" "�")
+    ("{\\\\~O}" "�")
+    ("{\\\\^O}" "�")
+    ("{\\\\\"U}" "�")
+    ("{\\\\`U}" "�")
+    ("{\\\\'U}" "�")
+    ("{\\\\^U}" "�")
+    ("{\\\\~n}" "�")
+    ("{\\\\~N}" "�")
+    ("{\\\\c c}" "�")
+    ("{\\\\c C}" "�")
+    ("\\\\\"{a}" "�")
+    ("\\\\`{a}" "�")
+    ("\\\\'{a}" "�")
+    ("\\\\~{a}" "�")
+    ("\\\\^{a}" "�")
+    ("\\\\\"{e}" "�")
+    ("\\\\`{e}" "�")
+    ("\\\\'{e}" "�")
+    ("\\\\^{e}" "�")
+    ("\\\\\"{\\\\i}" "�")
+    ("\\\\`{\\\\i}" "�")
+    ("\\\\'{\\\\i}" "�")
+    ("\\\\^{\\\\i}" "�")
+    ("\\\\\"{i}" "�")
+    ("\\\\`{i}" "�")
+    ("\\\\'{i}" "�")
+    ("\\\\^{i}" "�")
+    ("\\\\\"{o}" "�")
+    ("\\\\`{o}" "�")
+    ("\\\\'{o}" "�")
+    ("\\\\~{o}" "�")
+    ("\\\\^{o}" "�")
+    ("\\\\\"{u}" "�")
+    ("\\\\`{u}" "�")
+    ("\\\\'{u}" "�")
+    ("\\\\^{u}" "�")
+    ("\\\\\"{A}" "�")
+    ("\\\\`{A}" "�")
+    ("\\\\'{A}" "�")
+    ("\\\\~{A}" "�")
+    ("\\\\^{A}" "�")
+    ("\\\\\"{E}" "�")
+    ("\\\\`{E}" "�")
+    ("\\\\'{E}" "�")
+    ("\\\\^{E}" "�")
+    ("\\\\\"{I}" "�")
+    ("\\\\`{I}" "�")
+    ("\\\\'{I}" "�")
+    ("\\\\^{I}" "�")
+    ("\\\\\"{O}" "�")
+    ("\\\\`{O}" "�")
+    ("\\\\'{O}" "�")
+    ("\\\\~{O}" "�")
+    ("\\\\^{O}" "�")
+    ("\\\\\"{U}" "�")
+    ("\\\\`{U}" "�")
+    ("\\\\'{U}" "�")
+    ("\\\\^{U}" "�")
+    ("\\\\~{n}" "�")
+    ("\\\\~{N}" "�")
+    ("\\\\c{c}" "�")
+    ("\\\\c{C}" "�")
+    ("{\\\\ss}" "�")
+    ("?`" "�")
+    ("!`" "�")
+    ("{?`}" "�")
+    ("{!`}" "�")
+    )
+  "Translation table for translating TeX sequences to ISO 8859-1 characters. 
+This table is not exhaustive (and due to TeX's power can never be). It only
+contains commonly used sequences.")
+
+(defun iso-tex2iso ()
+ "Translate TeX sequences to ISO 8859-1 characters."
+ (interactive)
+ (iso-translate-conventions iso-tex2iso-trans-tab))
+
+(defvar iso-gtex2iso-trans-tab
+  '(
+    ("\"a" "�")
+    ("\"A" "�")
+    ("\"o" "�")
+    ("\"O" "�")
+    ("\"u" "�")
+    ("\"U" "�")
+    ("\"s" "�")
+    ("\\\\3" "�")
+    ("{\\\\\"a}" "�")
+    ("{\\\\`a}" "�")
+    ("{\\\\'a}" "�")
+    ("{\\\\~a}" "�")
+    ("{\\\\^a}" "�")
+    ("{\\\\\"e}" "�")
+    ("{\\\\`e}" "�")
+    ("{\\\\'e}" "�")
+    ("{\\\\^e}" "�")
+    ("{\\\\\"\\\\i}" "�")
+    ("{\\\\`\\\\i}" "�")
+    ("{\\\\'\\\\i}" "�")
+    ("{\\\\^\\\\i}" "�")
+    ("{\\\\\"i}" "�")
+    ("{\\\\`i}" "�")
+    ("{\\\\'i}" "�")
+    ("{\\\\^i}" "�")
+    ("{\\\\\"o}" "�")
+    ("{\\\\`o}" "�")
+    ("{\\\\'o}" "�")
+    ("{\\\\~o}" "�")
+    ("{\\\\^o}" "�")
+    ("{\\\\\"u}" "�")
+    ("{\\\\`u}" "�")
+    ("{\\\\'u}" "�")
+    ("{\\\\^u}" "�")
+    ("{\\\\\"A}" "�")
+    ("{\\\\`A}" "�")
+    ("{\\\\'A}" "�")
+    ("{\\\\~A}" "�")
+    ("{\\\\^A}" "�")
+    ("{\\\\\"E}" "�")
+    ("{\\\\`E}" "�")
+    ("{\\\\'E}" "�")
+    ("{\\\\^E}" "�")
+    ("{\\\\\"I}" "�")
+    ("{\\\\`I}" "�")
+    ("{\\\\'I}" "�")
+    ("{\\\\^I}" "�")
+    ("{\\\\\"O}" "�")
+    ("{\\\\`O}" "�")
+    ("{\\\\'O}" "�")
+    ("{\\\\~O}" "�")
+    ("{\\\\^O}" "�")
+    ("{\\\\\"U}" "�")
+    ("{\\\\`U}" "�")
+    ("{\\\\'U}" "�")
+    ("{\\\\^U}" "�")
+    ("{\\\\~n}" "�")
+    ("{\\\\~N}" "�")
+    ("{\\\\c c}" "�")
+    ("{\\\\c C}" "�")
+    ("\\\\\"{a}" "�")
+    ("\\\\`{a}" "�")
+    ("\\\\'{a}" "�")
+    ("\\\\~{a}" "�")
+    ("\\\\^{a}" "�")
+    ("\\\\\"{e}" "�")
+    ("\\\\`{e}" "�")
+    ("\\\\'{e}" "�")
+    ("\\\\^{e}" "�")
+    ("\\\\\"{\\\\i}" "�")
+    ("\\\\`{\\\\i}" "�")
+    ("\\\\'{\\\\i}" "�")
+    ("\\\\^{\\\\i}" "�")
+    ("\\\\\"{i}" "�")
+    ("\\\\`{i}" "�")
+    ("\\\\'{i}" "�")
+    ("\\\\^{i}" "�")
+    ("\\\\\"{o}" "�")
+    ("\\\\`{o}" "�")
+    ("\\\\'{o}" "�")
+    ("\\\\~{o}" "�")
+    ("\\\\^{o}" "�")
+    ("\\\\\"{u}" "�")
+    ("\\\\`{u}" "�")
+    ("\\\\'{u}" "�")
+    ("\\\\^{u}" "�")
+    ("\\\\\"{A}" "�")
+    ("\\\\`{A}" "�")
+    ("\\\\'{A}" "�")
+    ("\\\\~{A}" "�")
+    ("\\\\^{A}" "�")
+    ("\\\\\"{E}" "�")
+    ("\\\\`{E}" "�")
+    ("\\\\'{E}" "�")
+    ("\\\\^{E}" "�")
+    ("\\\\\"{I}" "�")
+    ("\\\\`{I}" "�")
+    ("\\\\'{I}" "�")
+    ("\\\\^{I}" "�")
+    ("\\\\\"{O}" "�")
+    ("\\\\`{O}" "�")
+    ("\\\\'{O}" "�")
+    ("\\\\~{O}" "�")
+    ("\\\\^{O}" "�")
+    ("\\\\\"{U}" "�")
+    ("\\\\`{U}" "�")
+    ("\\\\'{U}" "�")
+    ("\\\\^{U}" "�")
+    ("\\\\~{n}" "�")
+    ("\\\\~{N}" "�")
+    ("\\\\c{c}" "�")
+    ("\\\\c{C}" "�")
+    ("{\\\\ss}" "�")
+    ("?`" "�")
+    ("!`" "�")
+    ("{?`}" "�")
+    ("{!`}" "�")
+    )
+  "Translation table for translating German TeX sequences to ISO 8859-1.
+This table is not exhaustive (and due to TeX's power can never be).  It only
+contains commonly used sequences.")
+
+(defvar iso-iso2gtex-trans-tab
+  '(
+    ("�" "\"a")
+    ("�" "{\\\\`a}")
+    ("�" "{\\\\'a}")
+    ("�" "{\\\\~a}")
+    ("�" "{\\\\^a}")
+    ("�" "{\\\\\"e}")
+    ("�" "{\\\\`e}")
+    ("�" "{\\\\'e}")
+    ("�" "{\\\\^e}")
+    ("�" "{\\\\\"\\\\i}")
+    ("�" "{\\\\`\\\\i}")
+    ("�" "{\\\\'\\\\i}")
+    ("�" "{\\\\^\\\\i}")
+    ("�" "\"o")
+    ("�" "{\\\\`o}")
+    ("�" "{\\\\'o}")
+    ("�" "{\\\\~o}")
+    ("�" "{\\\\^o}")
+    ("�" "\"u")
+    ("�" "{\\\\`u}")
+    ("�" "{\\\\'u}")
+    ("�" "{\\\\^u}")
+    ("�" "\"A")
+    ("�" "{\\\\`A}")
+    ("�" "{\\\\'A}")
+    ("�" "{\\\\~A}")
+    ("�" "{\\\\^A}")
+    ("�" "{\\\\\"E}")
+    ("�" "{\\\\`E}")
+    ("�" "{\\\\'E}")
+    ("�" "{\\\\^E}")
+    ("�" "{\\\\\"I}")
+    ("�" "{\\\\`I}")
+    ("�" "{\\\\'I}")
+    ("�" "{\\\\^I}")
+    ("�" "\"O")
+    ("�" "{\\\\`O}")
+    ("�" "{\\\\'O}")
+    ("�" "{\\\\~O}")
+    ("�" "{\\\\^O}")
+    ("�" "\"U")
+    ("�" "{\\\\`U}")
+    ("�" "{\\\\'U}")
+    ("�" "{\\\\^U}")
+    ("�" "{\\\\~n}")
+    ("�" "{\\\\~N}")
+    ("�" "{\\\\c c}")
+    ("�" "{\\\\c C}")
+    ("�" "\"s")
+    ("�" "{?`}")
+    ("�" "{!`}")
+    )
+  "Translation table for translating ISO 8859-1 characters to German TeX.")
+
+(defun iso-gtex2iso ()
+ "Translate German TeX sequences to ISO 8859-1 characters."
+ (interactive)
+ (iso-translate-conventions iso-gtex2iso-trans-tab))
+
+
+(defun iso-iso2gtex ()
+ "Translate ISO 8859-1 characters to German TeX sequences."
+ (interactive)
+ (iso-translate-conventions iso-iso2gtex-trans-tab))
+
+
+(defun iso-german-tex-p ()
+ "Check if tex buffer is German LaTeX."
+ (save-excursion
+   (widen)
+   (goto-char (point-min))
+   (re-search-forward "\\\\documentstyle\\[.*german.*\\]" nil t)))
+
+(defun iso-fix-iso2tex ()
+  "Turn ISO 8859-1 (aka. ISO Latin-1) buffer into TeX sequences.
+If German TeX is used, German TeX sequences are generated."
+  (if (or (equal major-mode 'latex-mode)
+	  (equal major-mode 'LaTeX-mode)) ; AucTeX wants this
+      (if (iso-german-tex-p)
+	  (iso-iso2gtex)
+	(iso-iso2tex)))
+  (if (or (equal major-mode 'tex-mode)
+	  (equal major-mode 'TeX-mode)) ; AucTeX wants this
+      (iso-iso2tex)))
+
+(defun iso-fix-tex2iso ()
+  "Turn TeX sequences into ISO 8859-1 (aka. ISO Latin-1) characters.
+This function recognices German TeX buffers."
+  (if (or (equal major-mode 'latex-mode)
+	  (equal major-mode 'Latex-mode)) ; AucTeX wants this
+      (if (iso-german-tex-p)
+	  (iso-gtex2iso)
+	(iso-tex2iso)))
+  (if (or (equal major-mode 'tex-mode)
+	  (equal major-mode 'TeX-mode))  ;; AucTeX wants this
+      (iso-tex2iso)))
+
+(defun iso-cvt-ffh ()
+  "find-file-hook for iso-cvt-cvt.el."
+  (iso-fix-tex2iso)
+  (set-buffer-modified-p nil))
+
+(defun iso-cvt-wfh ()
+  "write file hook for iso-cvt-cvt.el."
+  (iso-fix-iso2tex))
+
+(defun iso-cvt-ash ()
+  "after save hook for iso-cvt-cvt.el."
+  (iso-fix-tex2iso)
+  (set-buffer-modified-p nil))
+
+(add-hook 'find-file-hooks 'iso-cvt-ffh)
+(add-hook 'write-file-hooks 'iso-cvt-wfh)
+(add-hook 'after-save-hook 'iso-cvt-ash)
+
+;;; iso-cvt.el ends here