From c4c465b6c7d6ca4149d9ffabea326ce00e6df45b Mon Sep 17 00:00:00 2001
From: kervala <devnull@localhost>
Date: Sat, 7 Nov 2015 14:52:46 +0100
Subject: [PATCH] Fixed: Get system language code under OS X too and added
 method in NLMISC::CI18N

---
 code/nel/include/nel/misc/i18n.h     |   8 ++
 code/nel/src/misc/i18n.cpp           | 108 +++++++++++++++++++++++++++
 code/ryzom/client/src/client_cfg.cpp |   5 +-
 3 files changed, 117 insertions(+), 4 deletions(-)

diff --git a/code/nel/include/nel/misc/i18n.h b/code/nel/include/nel/misc/i18n.h
index 5f98c5f34..1102a8907 100644
--- a/code/nel/include/nel/misc/i18n.h
+++ b/code/nel/include/nel/misc/i18n.h
@@ -104,6 +104,11 @@ public:
 	 */
 	static const std::vector<std::string> &getLanguageCodes();
  
+	/** Check if a language code is supported.
+	 *	Code are ISO 639-2 compliant.
+	 */
+	static bool isLanguageCodeSupported(const std::string &lang);
+
 	/// Load a language file depending of the language code("en", "fr", ...). Code are ISO 639-2 compliant.
 	static void load (const std::string &languageCode, const std::string &fallbackLanguageCode="");
 
@@ -119,6 +124,9 @@ public:
 	/// Returns the code of the language ("fr", "en", ...)
 	static std::string getCurrentLanguageCode ();
 
+	/// Returns the code of the language ("fr", "en", ...) defined on system
+	static std::string getSystemLanguageCode ();
+
 	/// Find a string in the selected language and return his association.
 	static const ucstring &get (const std::string &label);
 
diff --git a/code/nel/src/misc/i18n.cpp b/code/nel/src/misc/i18n.cpp
index e53750af7..0badbdb62 100644
--- a/code/nel/src/misc/i18n.cpp
+++ b/code/nel/src/misc/i18n.cpp
@@ -20,6 +20,12 @@
 #include "nel/misc/path.h"
 #include "nel/misc/i18n.h"
 
+#include <locale.h>
+
+#ifdef NL_OS_MAC
+#include <CoreFoundation/CoreFoundation.h>
+#endif
+
 using namespace std;
 
 #ifdef DEBUG_NEW
@@ -226,6 +232,108 @@ string CI18N::getCurrentLanguageCode ()
 	return _SelectedLanguageCode;
 }
 
+bool CI18N::isLanguageCodeSupported(const std::string &lang)
+{
+	initLanguages();
+
+	for (sint i = 0, ilen = _LanguageCodes.size(); i < ilen; ++i)
+	{
+		if (lang == _LanguageCodes[i]) return true;
+	}
+
+	return false;
+}
+
+std::string CI18N::getSystemLanguageCode ()
+{
+	static std::string s_cachedSystemLanguage;
+
+	if (!s_cachedSystemLanguage.empty())
+		return s_cachedSystemLanguage;
+
+#ifdef NL_OS_MAC
+	// under OS X, locale is only defined in console, not in UI
+	// so we need to use CoreFoundation API to retrieve it
+
+	// get an array with all preferred languages
+	CFArrayRef langs = CFLocaleCopyPreferredLanguages();
+
+	if (langs)
+	{
+		// get languages count
+		sint languagesCount = CFArrayGetCount(langs);
+
+		// process each language
+		for (sint i = 0; i < languagesCount; ++i)
+		{
+			std::string lang;
+
+			// get language CFString
+			CFStringRef langCF = (CFStringRef)CFArrayGetValueAtIndex(langs, i);
+
+			if (langCF)
+			{
+				// get a C string from CFString
+				const char *langStr = CFStringGetCStringPtr(langCF, kCFStringEncodingASCII);
+
+				if (!langStr)
+				{
+					// get length of the CFString
+					CFIndex length = CFStringGetLength(langCF);
+
+					// allocate a temporary buffer to hold converted string
+					char *tmp = new char[length+1];
+
+					// use alternative function to get a C string from CFString
+					if (CFStringGetCString(langCF, tmp, length+1, kCFStringEncodingASCII))
+					{
+						lang = std::string(tmp, length);
+					}
+					else
+					{
+						nlerror("Unable to convert CFStringRef to string");
+					}
+
+					delete [] tmp;
+				}
+				else
+				{
+					lang = std::string(langStr);
+				}
+
+				CFRelease(langCF);
+			}
+
+			// only keep language code if supported by NeL
+			if (!lang.empty() && isLanguageCodeSupported(lang))
+			{
+				s_cachedSystemLanguage = lang;
+				break;
+			}
+		}
+
+		// don't need languages array anymore
+		CFRelease(langs);
+	}
+#endif
+
+	// use system locale (works under Linux and Windows)
+	if (s_cachedSystemLanguage.empty())
+	{
+		std::string lang = NLMISC::toLower(std::string(setlocale(LC_CTYPE, "")));
+
+		// only keep 2 first characters
+		if (lang.size() > 1)
+			s_cachedSystemLanguage = lang.substr(0, 2);
+	}
+
+	// english is default language
+	if (s_cachedSystemLanguage.empty())
+		s_cachedSystemLanguage = "en";
+
+	return s_cachedSystemLanguage;
+}
+
 void CI18N::removeCComment(ucstring &commentedString)
 {
 	ucstring temp;
diff --git a/code/ryzom/client/src/client_cfg.cpp b/code/ryzom/client/src/client_cfg.cpp
index ff86b5091..7c964904b 100644
--- a/code/ryzom/client/src/client_cfg.cpp
+++ b/code/ryzom/client/src/client_cfg.cpp
@@ -49,8 +49,6 @@
 #include "app_bundle_utils.h"
 #endif // NL_OS_MAC
 
-#include <locale.h>
-
 ///////////
 // MACRO //
 ///////////
@@ -1934,8 +1932,7 @@ void CClientConfig::init(const string &configFileName)
 			nlwarning("CFG::init: creating '%s' with default values", configFileName.c_str ());
 
 		// get current locale
-		std::string lang = toLower(std::string(setlocale(LC_CTYPE, "")));
-		lang = lang.substr(0, 2);
+		std::string lang = CI18N::getSystemLanguageCode();
 
 		const std::vector<std::string> &languages = CI18N::getLanguageCodes();