Use appmenu only if system supports it

gajim/common/app.py

@@ -28,6 +28,7 @@
 ##
 
 import os
+import sys
 import logging
 import locale
 import uuid
@@ -500,3 +501,10 @@ def get_priority(account, show):
 def log(domain):
     root = 'gajim.'
     return logging.getLogger(root + domain)
+
+def prefers_app_menu():
+    if sys.platform == 'darwin':
+        return True
+    if sys.platform == 'win32':
+        return False
+    return app.prefers_app_menu()

gajim/gajim.py

@@ -215,10 +215,9 @@ class GajimApplication(Gtk.Application):
         builder.add_from_file(path)
         menubar = builder.get_object("menubar")
         appmenu = builder.get_object("appmenu")
-        if os.name != 'nt':
+        if app.prefers_app_menu():
             self.set_app_menu(appmenu)
         else:
-            # Dont set Application Menu for Windows
             # Add it to the menubar instead
             menubar.prepend_submenu('Gajim', appmenu)
         self.set_menubar(menubar)

gajim/gui_menu_builder.py

@@ -767,9 +767,9 @@ def get_account_menu(account):
 def build_accounts_menu():
     menubar = app.app.get_menubar()
     # Accounts Submenu
-    menu_position = 0
-    if os.name == 'nt':
     menu_position = 1
+    if app.prefers_app_menu():
+        menu_position = 0
 
     acc_menu = menubar.get_item_link(menu_position, 'submenu')
     acc_menu.remove_all()
@@ -796,9 +796,9 @@ def build_bookmark_menu(account):
     if not bookmark_menu:
         return
 
-    menu_position = 0
-    if os.name == 'nt':
     menu_position = 1
+    if app.prefers_app_menu():
+        menu_position = 0
 
     # Accounts Submenu
     acc_menu = menubar.get_item_link(menu_position, 'submenu')