i18nlangtag/source/isolang/inwnt.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
  21 #include <sal/config.h>
  22
  23 #include <windef.h>
  24 #include <winbase.h>
  25 #include <winnls.h>
  26 #include <osl/mutex.hxx>
  27 #include <osl/doublecheckedlocking.h>
  28 #include <i18nlangtag/mslangid.hxx>
  29
  30 static LanguageType nImplSystemLanguage = LANGUAGE_DONTKNOW;
  31 static LanguageType nImplSystemUILanguage = LANGUAGE_DONTKNOW;
  32
  33
  34 static LanguageType GetSVLang( LANGID nWinLangId )
  35 {
  36     // No Translation, we work with the original MS code without the SORT_ID.
  37     // So we can get never LANG-ID's from MS, which are currently not defined
  38     // by us.
  39     return LanguageType( static_cast<sal_uInt16>(nWinLangId & 0xffff));
  40 }
  41
  42
  43 typedef LANGID (WINAPI *getLangFromEnv)();
  44
  45 static void getPlatformSystemLanguageImpl( LanguageType& rSystemLanguage,
  46         getLangFromEnv pGetUserDefault, getLangFromEnv pGetSystemDefault )
  47 {
  48     LanguageType nLang = rSystemLanguage;
  49     if ( nLang == LANGUAGE_DONTKNOW )
  50     {
  51         ::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex());
  52         nLang = rSystemLanguage;
  53         if ( nLang == LANGUAGE_DONTKNOW )
  54         {
  55             LANGID nLangId;
  56
  57             nLangId = pGetUserDefault();
  58             nLang = GetSVLang( nLangId );
  59
  60             if ( nLang == LANGUAGE_DONTKNOW )
  61             {
  62                 nLangId = pGetSystemDefault();
  63                 nLang = GetSVLang( nLangId );
  64             }
  65             OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
  66             rSystemLanguage = nLang;
  67         }
  68         else
  69         {
  70             OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
  71         }
  72     }
  73 }
  74
  75
  76 LanguageType MsLangId::getPlatformSystemLanguage()
  77 {
  78     getPlatformSystemLanguageImpl( nImplSystemLanguage,
  79             &GetUserDefaultLangID, &GetSystemDefaultLangID);
  80     return nImplSystemLanguage;
  81 }
  82
  83
  84 LanguageType MsLangId::getPlatformSystemUILanguage()
  85 {
  86     // TODO: this could be distinguished, #if(WINVER >= 0x0500)
  87     // needs _run_ time differentiation though, not at compile time.
  88     getPlatformSystemLanguageImpl( nImplSystemUILanguage,
  89             &GetUserDefaultUILanguage, &GetSystemDefaultUILanguage);
  90     return nImplSystemUILanguage;
  91 }
  92
  93 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */