Add fallback support in tinygettext, fixing languages like fr_CA, which relies on fr

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@7981 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/tinygettext/dictionary.cpp

@@ -27,6 +27,7 @@ Dictionary::Dictionary(const std::string& charset_) :
   charset(charset_),
   plural_forms()
 {
+    m_has_fallback = false;
 }
 
 Dictionary::~Dictionary()
@@ -108,7 +109,9 @@ Dictionary::translate(const Entries& dict, const std::string& msgid)
   else
   {
     //log_info << "Couldn't translate: " << msgid << std::endl;
-    return msgid;
+        
+    if (m_has_fallback) return m_fallback->translate(msgid);
+    else return msgid;
   } 
 }
 

src/tinygettext/dictionary.hpp

@@ -43,6 +43,9 @@ private:
   std::string translate(const Entries& dict, const std::string& msgid);
   std::string translate_plural(const Entries& dict, const std::string& msgid, const std::string& msgidplural, int num);
 
+  bool m_has_fallback;
+  Dictionary* m_fallback;
+    
 public:
   /** Constructs a dictionary converting to the specified \a charset (default UTF-8) */
   Dictionary(const std::string& charset = "UTF-8");
@@ -100,6 +103,12 @@ public:
     return func;
   }
 
+  void addFallback(Dictionary* fallback)
+  {
+      m_has_fallback = true;
+      m_fallback = fallback;
+  }
+    
   /** Iterate over all messages with a context, Func is of type:
       void func(const std::string& ctxt, const std::string& msgid, const std::vector<std::string>& msgstrs) */
   template<class Func>

src/tinygettext/dictionary_manager.cpp

@@ -164,6 +164,11 @@ DictionaryManager::get_dictionary(const Language& language)
       }
     }
 
+    if (language.get_country().size() > 0)
+    {
+        printf("Adding language fallback %s\n", language.get_language().c_str());
+        dict->addFallback( &get_dictionary(Language::from_spec(language.get_language())) );
+    }
     return *dict;
   }
 }