sal/osl/w32/nlsupport.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #define WIN32_LEAN_AND_MEAN
  21 #include <windows.h>
  22
  23 #include <wchar.h>
  24
  25 #include "nlsupport.hxx"
  26
  27 #include <osl/nlsupport.h>
  28 #include <osl/diagnose.h>
  29 #include <osl/process.h>
  30 #include <rtl/tencinfo.h>
  31 #include <rtl/ustrbuf.hxx>
  32 #include <o3tl/char16_t2wchar_t.hxx>
  33
  34 /* XXX NOTE:
  35  * http://msdn.microsoft.com/en-us/library/windows/desktop/dd373848.aspx
  36  * (retrieved 2013-02-13) has some weird description for the LOCALE_SISO*
  37  * constants: "The maximum number of characters allowed for this string is
  38  * nine, including a terminating null character." NINE?!? In ISO 639 and ISO
  39  * 3166?
  40  */
  41 constexpr int ELP_LANGUAGE_FIELD_LENGTH = 4;
  42 constexpr int ELP_COUNTRY_FIELD_LENGTH = 3;
  43
  44 static int GetLocaleInfoN(LPCWSTR l, LCTYPE t, DWORD& n)
  45 {
  46     return GetLocaleInfoEx(l, t | LOCALE_RETURN_NUMBER, reinterpret_cast<LPWSTR>(&n),
  47                            sizeof(n) / sizeof(WCHAR));
  48 }
  49
  50 rtl_TextEncoding SAL_CALL osl_getTextEncodingFromLocale( rtl_Locale * pLocale )
  51 {
  52     /* if pLocale is NULL, use process locale as default */
  53     if( nullptr == pLocale )
  54         osl_getProcessLocale( &pLocale );
  55
  56     if (!pLocale || !pLocale->Language || !pLocale->Language->length)
  57         return RTL_TEXTENCODING_DONTKNOW;
  58
  59     /* Build a BCP47 tag */
  60     OUStringBuffer sLocale(OUString::unacquired(&pLocale->Language));
  61     if (pLocale->Country && pLocale->Country->length > 0)
  62         sLocale.append("-" + OUString::unacquired(&pLocale->Country));
  63     sLocale.append('\0');
  64
  65     /* query ansi codepage for given locale */
  66     DWORD codepage;
  67     if (!GetLocaleInfoN(o3tl::toW(sLocale.getStr()), LOCALE_IDEFAULTANSICODEPAGE, codepage))
  68     {
  69         WCHAR resolved[LOCALE_NAME_MAX_LENGTH];
  70         if (!ResolveLocaleName(o3tl::toW(sLocale.getStr()), resolved, std::size(resolved)))
  71             return RTL_TEXTENCODING_DONTKNOW;
  72         if (!GetLocaleInfoN(resolved, LOCALE_IDEFAULTANSICODEPAGE, codepage))
  73             return RTL_TEXTENCODING_DONTKNOW;
  74     }
  75
  76     /* if GetLocaleInfo returns 0, it is a UNICODE only locale */
  77     if (0 == codepage)
  78         return RTL_TEXTENCODING_UNICODE;
  79
  80     /* find matching rtl encoding */
  81     return rtl_getTextEncodingFromWindowsCodePage(codepage);
  82 }
  83
  84 void imp_getProcessLocale( rtl_Locale ** ppLocale )
  85 {
  86     WCHAR locale[LOCALE_NAME_MAX_LENGTH];
  87     WCHAR langCode[ELP_LANGUAGE_FIELD_LENGTH];
  88     WCHAR ctryCode[ELP_COUNTRY_FIELD_LENGTH];
  89
  90     OSL_ASSERT( ppLocale );
  91
  92     /* get the locale name to retrieve information from */
  93     /* and call GetLocaleInfo to retrieve the iso codes */
  94     if( GetUserDefaultLocaleName(locale, std::size(locale)) &&
  95         GetLocaleInfoEx( locale, LOCALE_SISO639LANGNAME , langCode, std::size(langCode) )  &&
  96         GetLocaleInfoEx( locale, LOCALE_SISO3166CTRYNAME , ctryCode, std::size(ctryCode) ) )
  97     {
  98         *ppLocale = rtl_locale_register( o3tl::toU(langCode), o3tl::toU(ctryCode), u"" );
  99     }
 100     else
 101     {
 102         *ppLocale = rtl_locale_register( u"C", u"", u"" );
 103     }
 104 }
 105
 106 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */