Remove confusing reference to SDL/GLUT

[flightgear.git] / src / Main / locale.cxx

diff --git a/src/Main/locale.cxx b/src/Main/locale.cxx
index ae4cedf076e529932965cb4e82f4e4f815ab6792..1d30dfed0f3d086cd972d7ea1dfce642dd4358b6 100644 (file)
--- a/src/Main/locale.cxx
+++ b/src/Main/locale.cxx
@@ -18,10 +18,16 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #ifdef HAVE_WINDOWS_H
 #include <windows.h>
 #endif
 
+#include <boost/foreach.hpp>
+
 #include <simgear/props/props_io.hxx>
 #include <simgear/structure/exception.hxx>
 
@@ -53,9 +59,10 @@ FGLocale::~FGLocale()
  *
  * This software comes with no warranty. Use at your own risk.
  */
-const char*
+string_list
 FGLocale::getUserLanguage()
 {
+    string_list result;
     static char locale[100] = {0};
 
     if (GetLocaleInfo(LOCALE_USER_DEFAULT,
@@ -68,23 +75,55 @@ FGLocale::getUserLanguage()
         if (GetLocaleInfo(LOCALE_USER_DEFAULT,
                           LOCALE_SISO3166CTRYNAME,
                           locale+i, (int)(sizeof(locale)-i)))
-            return locale;
-
+        {
+            result.push_back(locale);
+            return result;
+        }
+        
         locale[--i] = 0;
         SG_LOG(SG_GENERAL, SG_WARN, "Failed to detected locale's country setting.");
-        return locale;
+        result.push_back(locale);
+        return result;
     }
 
-    return NULL;
+    return result;
+}
+#elif __APPLE__
+
+// determine locale / langauge on Mac
+#include <CoreFoundation/CoreFoundation.h>
+
+string_list
+FGLocale::getUserLanguage()
+{
+    string_list result;
+    CFArrayRef langs = CFLocaleCopyPreferredLanguages();
+    
+    char buffer[64];
+    for (int i=0; i<CFArrayGetCount(langs); ++i) {
+        CFStringRef s = (CFStringRef) CFArrayGetValueAtIndex(langs, i);
+        CFStringGetCString(s, buffer, 64, kCFStringEncodingASCII);
+        result.push_back(buffer);
+    }
+    
+    CFRelease(langs);
+    return result;
 }
+
 #else
 /**
- * Determine locale/language settings on Linux (and Mac?).
+ * Determine locale/language settings on Linux/Unix.
  */
-const char*
+string_list
 FGLocale::getUserLanguage()
 {
-    return ::getenv("LANG");
+    string_list result;
+    const char* langEnv = ::getenv("LANG");
+    if (langEnv) {
+        result.push_back(langEnv);
+    }
+    
+    return result;
 }
 #endif
 
@@ -138,21 +177,27 @@ FGLocale::findLocaleNode(const string& language)
 bool
 FGLocale::selectLanguage(const char *language)
 {
-    // Use system setting when no language is given.
-    if ((language == NULL)||(language[0]==0))
-    {
-        language = getUserLanguage();
-        SG_LOG(SG_GENERAL, SG_INFO, "System language: " << ((language) ? language : "<unavailable>"));
-    }
-
-    // Use plain C locale if nothing is available.
-    if ((language == NULL)||(language[0]==0))
-    {
+    string_list languages = getUserLanguage();
+    if (languages.empty()) {
+        // Use plain C locale if nothing is available.
         SG_LOG(SG_GENERAL, SG_WARN, "Unable to detect system language" );
-        language = "C";
+        languages.push_back("C");
+    }
+    
+    // if we were passed a language option, try it first
+    if ((language != NULL) && (strlen(language) > 0)) {
+        languages.insert(languages.begin(), string(language));
     }
 
-    SGPropertyNode *locale = findLocaleNode(language);
+    
+    SGPropertyNode *locale = NULL;
+    BOOST_FOREACH(string lang, languages) {
+        locale = findLocaleNode(lang);
+        if (locale) {
+            break;
+        }
+    }
+    
     if (!locale)
     {
        SG_LOG(SG_GENERAL, SG_ALERT,
@@ -161,6 +206,10 @@ FGLocale::selectLanguage(const char *language)
     }
 
     _currentLocale = locale;
+
+    // load resource for system messages (translations for fgfs internal messages)
+    loadResource("sys");
+
     return true;
 }
 
@@ -264,14 +313,14 @@ FGLocale::getLocalizedStrings(const char* id, const char* resource)
         if (_currentLocale)
         {
             simgear::PropertyList s = getLocalizedStrings(_currentLocale, id, resource);
-            if (s.size())
+            if (! s.empty())
                 return s;
         }
 
         if (_defaultLocale)
         {
             simgear::PropertyList s = getLocalizedStrings(_defaultLocale, id, resource);
-            if (s.size())
+            if (! s.empty())
                 return s;
         }
     }