[gen] Allow to specify several folder within an app where to store static ui content (js, css, images). [gen] When browser settings are ignored or absent, default language is the first one listed in Config.languages.

gen/__init__.py

@@ -171,4 +171,8 @@ class Config:
     # When using a LDAP for authenticating users, place an instance of class
     # LdapConfig above in the field below.
     ldap = None
+    # For an app, the default folder where to look for static content for the
+    # user interface (CSS, Javascript and image files) is folder "ui" within
+    # this app.
+    uiFolders = ['ui']
 # ------------------------------------------------------------------------------

gen/installer.py

@@ -66,8 +66,13 @@ class ZopeInstaller:
         # the one from the app-specific folder is chosen.
         j = os.path.join
         uiFolders = [j(j(appy.getPath(), 'gen'), 'ui')]
-        appUi = j(self.config.diskFolder, 'ui')
-        if os.path.exists(appUi): uiFolders.insert(0, appUi)
+        for uiFolder in self.config.appConfig.uiFolders:
+            if uiFolder.startswith('..'):
+                folder = j(os.path.dirname(self.config.diskFolder),uiFolder[3:])
+            else:
+                folder = j(self.config.diskFolder, uiFolder)
+            if os.path.exists(folder):
+                uiFolders.insert(0, folder)
         for ui in uiFolders:
             for root, dirs, files in os.walk(ui):
                 folderName = root[len(ui):]

gen/mixins/__init__.py

@@ -1470,7 +1470,8 @@ class BaseMixin:
 
     def getUserLanguage(self):
         '''Gets the language (code) of the current user.'''
-        if not hasattr(self, 'REQUEST'): return 'en'
+        if not hasattr(self, 'REQUEST'):
+            return self.getProductConfig().appConfig.languages[0]
         # Try the value which comes from the cookie. Indeed, if such a cookie is
         # present, it means that the user has explicitly chosen this language
         # via the language selector.
@@ -1484,7 +1485,7 @@ class BaseMixin:
         # language preferences as defined in the user's browser. Several
         # languages can be listed, from most to less wanted.
         res = self.REQUEST.get('HTTP_ACCEPT_LANGUAGE', None)
-        if not res: return 'en'
+        if not res: return self.getProductConfig().appConfig.languages[0]
         if ',' in res: res = res[:res.find(',')]
         if '-' in res: res = res[:res.find('-')]
         return res