Bug #374259 --> bad things happen when you create a saved search in an inbox subfolder whose name starts with a '.'. sr=bienvenu

mailnews/base/resources/content/virtualFolderProperties.js

@@ -202,17 +202,22 @@ function onOK()
   }
   else if (name && uri) // create a new virtual folder
   {
-    
     // check to see if we already have a folder with the same name and alert the user if so...
     var parentFolder = GetMsgFolderFromUri(uri);
-    if (parentFolder.containsChildNamed(name))
+    
+    // sanity check the name based on the logic used by nsMsgBaseUtils.cpp. It can't start with a '.', it can't end with a '.', '~' or ' '.
+    // it can't contain a ';' or '#'.
+    if (/^\.|[\.\~ ]$|[\;\#]/.test(name))
+    {
+      window.alert(messengerBundle.getString('folderCreationFailed'));
+      return false;
+    }
+    else if (parentFolder.containsChildNamed(name))
     {
       window.alert(messengerBundle.getString('folderExists'));
       return false;
     }
     
-    // XXX: Add code to make sure a folder with this name does not already exist before creating the virtual folder...
-    // Alert the user here if that is the case.
     saveSearchTerms(gSearchTermSession.searchTerms, gSearchTermSession);
     CreateVirtualFolder(name, parentFolder, gSearchFolderURIs, gSearchTermSession.searchTerms, searchOnline);
   }