Allow nick completion in the Private tabs as well.

src/tabs.py

@@ -8,9 +8,9 @@
 """
 a Tab object is a way to organize various Windows (see windows.py)
 around the screen at once.
-A tab is then composed of multiple Buffer.
+A tab is then composed of multiple Buffers.
 Each Tab object has different refresh() and resize() methods, defining how its
-Windows are displayed, resized, etc
+Windows are displayed, resized, etc.
 """
 
 MIN_WIDTH = 42
@@ -1566,7 +1566,26 @@ class PrivateTab(ChatTab):
         self.parent_muc.privates.remove(self)
 
     def completion(self):
-        self.complete_commands(self.input)
+        """
+        Called when Tab is pressed, complete the nickname in the input
+        """
+        if self.complete_commands(self.input):
+            return
+
+        # If we are not completing a command or a command's argument, complete a nick
+        compare_users = lambda x: x.last_talked
+        word_list = [user.nick for user in sorted(self.parent_muc.users, key=compare_users, reverse=True)\
+                         if user.nick != self.own_nick]
+        after = config.get('after_completion', ',')+" "
+        input_pos = self.input.pos + self.input.line_pos
+        if ' ' not in self.input.get_text()[:input_pos] or (self.input.last_completion and\
+                     self.input.get_text()[:input_pos] == self.input.last_completion + after):
+            add_after = after
+        else:
+            add_after = ''
+        self.input.auto_completion(word_list, add_after, quotify=False)
+        empty_after = self.input.get_text() == '' or (self.input.get_text().startswith('/') and not self.input.get_text().startswith('//'))
+        self.send_composing_chat_state(empty_after)
 
     def command_say(self, line, attention=False):
         if not self.on: