Added a function to get a translation with fallback for addons

svn: r13475

src/TransUtils.py

@@ -73,6 +73,25 @@ def setup_gettext():
     #used sometimes:
     #gettext.install(LOCALEDOMAIN, LOCALEDIR, unicode=1)
 
+def get_addon_translator(filename, domain='addon'):
+    """
+    Get a translator for an addon. 
+    Assumes filename_dir/locale/LANG/LC_MESSAGES/addon.mo.
+    """
+    import locale
+    LANG = locale.getlocale()[0]
+    path = os.path.dirname(os.path.abspath(filename))
+    trans = Translator(LANG)
+    try:
+        fallback = gettext.translation(domain, 
+                                       os.path.join(path, "locale"), 
+                                       languages=[LANG])
+        trans.trans.add_fallback(fallback)
+    except:
+        print ("WARN: can't add local '%s' addon translation for '%s'." % 
+               (filename, LANG))
+    return trans
+    
 def get_available_translations():
     """
     Get a list of available translations.