mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-03 08:30:09 +00:00
efe7ebe3d5
car of each association to a string. (po-find-file-coding-system-guts): If the charset matches a name of a codepage, set up that codepage and return it as a coding system to decode the file.
186 lines
6.9 KiB
EmacsLisp
186 lines
6.9 KiB
EmacsLisp
;;; po.el --- basic support of PO translation files -*- coding: latin-1; -*-
|
|
|
|
;; Copyright (C) 1995-1998, 2000-2002 Free Software Foundation, Inc.
|
|
|
|
;; Authors: François Pinard <pinard@iro.umontreal.ca>,
|
|
;; Greg McGary <gkm@magilla.cichlid.com>,
|
|
;; Bruno Haible <bruno@clisp.org>.
|
|
;; Keywords: i18n, files
|
|
|
|
;; 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, Inc., 59 Temple Place - Suite 330,
|
|
;; Boston, MA 02111-1307, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;; This package makes sure visiting PO files decodes them correctly,
|
|
;; according to the Charset= header in the PO file. For more support
|
|
;; for editing PO files, see po-mode.el.
|
|
|
|
;;; Code:
|
|
|
|
(defconst po-content-type-charset-alist
|
|
'(; Note: Emacs 21 doesn't support all encodings, thus the missing entries.
|
|
("ASCII" . undecided)
|
|
("ANSI_X3.4-1968" . undecided)
|
|
("US-ASCII" . undecided)
|
|
("ISO-8859-1" . iso-8859-1)
|
|
("ISO_8859-1" . iso-8859-1)
|
|
("ISO-8859-2" . iso-8859-2)
|
|
("ISO_8859-2" . iso-8859-2)
|
|
("ISO-8859-3" . iso-8859-3)
|
|
("ISO_8859-3" . iso-8859-3)
|
|
("ISO-8859-4" . iso-8859-4)
|
|
("ISO_8859-4" . iso-8859-4)
|
|
("ISO-8859-5" . iso-8859-5)
|
|
("ISO_8859-5" . iso-8859-5)
|
|
;("ISO-8859-6" . ??)
|
|
;("ISO_8859-6" . ??)
|
|
("ISO-8859-7" . iso-8859-7)
|
|
("ISO_8859-7" . iso-8859-7)
|
|
("ISO-8859-8" . iso-8859-8)
|
|
("ISO_8859-8" . iso-8859-8)
|
|
("ISO-8859-9" . iso-8859-9)
|
|
("ISO_8859-9" . iso-8859-9)
|
|
;("ISO-8859-13" . ??)
|
|
;("ISO_8859-13" . ??)
|
|
("ISO-8859-15" . iso-8859-15) ; requires Emacs 21
|
|
("ISO_8859-15" . iso-8859-15) ; requires Emacs 21
|
|
("KOI8-R" . koi8-r)
|
|
;("KOI8-U" . ??)
|
|
("CP437" . cp437) ; requires Emacs 20
|
|
("CP775" . cp775) ; requires Emacs 20
|
|
("CP850" . cp850) ; requires Emacs 20
|
|
("CP852" . cp852) ; requires Emacs 20
|
|
("CP855" . cp855) ; requires Emacs 20
|
|
;("CP856" . ??)
|
|
("CP857" . cp857) ; requires Emacs 20
|
|
("CP861" . cp861) ; requires Emacs 20
|
|
("CP862" . cp862) ; requires Emacs 20
|
|
("CP864" . cp864) ; requires Emacs 20
|
|
("CP865" . cp865) ; requires Emacs 20
|
|
("CP866" . cp866) ; requires Emacs 21
|
|
("CP869" . cp869) ; requires Emacs 20
|
|
;("CP874" . ??)
|
|
;("CP922" . ??)
|
|
;("CP932" . ??)
|
|
;("CP943" . ??)
|
|
;("CP949" . ??)
|
|
;("CP950" . ??)
|
|
;("CP1046" . ??)
|
|
;("CP1124" . ??)
|
|
;("CP1129" . ??)
|
|
("CP1250" . cp1250) ; requires Emacs 20
|
|
("CP1251" . cp1251) ; requires Emacs 20
|
|
("CP1252" . iso-8859-1) ; approximation
|
|
("CP1253" . cp1253) ; requires Emacs 20
|
|
("CP1254" . iso-8859-9) ; approximation
|
|
("CP1255" . iso-8859-8) ; approximation
|
|
;("CP1256" . ??)
|
|
("CP1257" . cp1257) ; requires Emacs 20
|
|
("GB2312" . cn-gb-2312) ; also named 'gb2312' in XEmacs 21 or Emacs 21
|
|
; also named 'euc-cn' in Emacs 20 or Emacs 21
|
|
("EUC-JP" . euc-jp)
|
|
("EUC-KR" . euc-kr)
|
|
;("EUC-TW" . ??)
|
|
("BIG5" . big5)
|
|
;("BIG5-HKSCS" . ??)
|
|
;("GBK" . ??)
|
|
;("GB18030" . ??)
|
|
("SHIFT_JIS" . shift_jis)
|
|
;("JOHAB" . ??)
|
|
("TIS-620" . tis-620) ; requires Emacs 20 or Emacs 21
|
|
("VISCII" . viscii) ; requires Emacs 20 or Emacs 21
|
|
("UTF-8" . utf-8) ; requires Mule-UCS in Emacs 20, or Emacs 21
|
|
)
|
|
"How to convert a GNU libc/libiconv canonical charset name as seen in
|
|
Content-Type into a Mule coding system.")
|
|
|
|
(defun po-find-charset (filename)
|
|
"Return PO file charset value."
|
|
(interactive)
|
|
(let ((charset-regexp
|
|
"^\"Content-Type: text/plain;[ \t]*charset=\\(.*\\)\\\\n\"")
|
|
(short-read nil))
|
|
;; Try the first 4096 bytes. In case we cannot find the charset value
|
|
;; within the first 4096 bytes (the PO file might start with a long
|
|
;; comment) try the next 4096 bytes repeatedly until we'll know for sure
|
|
;; we've checked the empty header entry entirely.
|
|
(while (not (or short-read (re-search-forward "^msgid" nil t)))
|
|
(save-excursion
|
|
(goto-char (point-max))
|
|
(let ((pair (insert-file-contents-literally filename nil
|
|
(1- (point))
|
|
(1- (+ (point) 4096)))))
|
|
(setq short-read (< (nth 1 pair) 4096)))))
|
|
(cond ((re-search-forward charset-regexp nil t) (match-string 1))
|
|
(short-read nil)
|
|
;; We've found the first msgid; maybe, only a part of the msgstr
|
|
;; value was loaded. Load the next 1024 bytes; if charset still
|
|
;; isn't available, give up.
|
|
(t (save-excursion
|
|
(goto-char (point-max))
|
|
(insert-file-contents-literally filename nil
|
|
(1- (point))
|
|
(1- (+ (point) 1024))))
|
|
(if (re-search-forward charset-regexp nil t)
|
|
(match-string 1))))))
|
|
|
|
(defun po-find-file-coding-system-guts (operation filename)
|
|
"\
|
|
Return a Mule (DECODING . ENCODING) pair, according to PO file charset.
|
|
Called through file-coding-system-alist, before the file is visited for real."
|
|
(and (eq operation 'insert-file-contents)
|
|
(file-exists-p filename)
|
|
(with-temp-buffer
|
|
(let* ((coding-system-for-read 'no-conversion)
|
|
(charset (or (po-find-charset filename) "ascii"))
|
|
(charset-upper (upcase charset))
|
|
(charset-lower (downcase charset))
|
|
(candidate
|
|
(cdr (assoc charset-upper po-content-type-charset-alist)))
|
|
(try (or candidate (intern-soft charset-lower))))
|
|
(list (cond ((and try (coding-system-p try))
|
|
try)
|
|
((and try
|
|
(string-match "\\`cp[1-9][0-9][0-9]?\\'"
|
|
(symbol-name try))
|
|
(assoc (substring (symbol-name try) 2)
|
|
(cp-supported-codepages)))
|
|
(codepage-setup (substring (symbol-name try) 2))
|
|
try)
|
|
((and (string-match "\\`cp[1-9][0-9][0-9]?\\'"
|
|
charset-lower)
|
|
(assoc (substring charset-lower 2)
|
|
(cp-supported-codepages)))
|
|
(codepage-setup (substring charset-lower 2))
|
|
(intern charset-lower))
|
|
(t
|
|
'no-conversion)))))))
|
|
|
|
;;;###autoload
|
|
(defun po-find-file-coding-system (arg-list)
|
|
"\
|
|
Return a Mule (DECODING . ENCODING) pair, according to PO file charset.
|
|
Called through file-coding-system-alist, before the file is visited for real."
|
|
(po-find-file-coding-system-guts (car arg-list) (car (cdr arg-list))))
|
|
;; This is for XEmacs.
|
|
;(defun po-find-file-coding-system (operation filename)
|
|
; "\
|
|
;Return a Mule (DECODING . ENCODING) pair, according to PO file charset.
|
|
;Called through file-coding-system-alist, before the file is visited for real."
|
|
; (po-find-file-coding-system-guts operation filename))
|