Fix #2441 (don’t send chatstates in a non-chatstate conv)

Also enable chatstates when we receive them from our contacts.

src/core.py

@@ -3272,6 +3272,7 @@ class Core(object):
                             identifier=message['id'],
                             jid=message['from'],
                             typ=1)
+
         if tab.remote_wants_chatstates is None:
             if message['chat_state']:
                 tab.remote_wants_chatstates = True
@@ -3317,6 +3318,7 @@ class Core(object):
         tab = self.get_conversation_by_jid(message['from'], False)
         if not tab:
             return False
+        tab.remote_wants_chatstates = True
         self.events.trigger('normal_chatstate', message, tab)
         tab.chatstate = state
         if state == 'gone' and isinstance(tab, tabs.DynamicConversationTab):
@@ -3333,6 +3335,7 @@ class Core(object):
         tab = self.get_tab_by_name(message['from'].full, tabs.PrivateTab)
         if not tab:
             return
+        tab.remote_wants_chatstates = True
         self.events.trigger('private_chatstate', message, tab)
         tab.chatstate = state
         if tab == self.current_tab():

src/tabs.py

@@ -576,11 +576,13 @@ class ChatTab(Tab):
         if not isinstance(self, MucTab) or self.joined:
             if state in ('active', 'inactive', 'gone') and self.inactive and not always_send:
                 return
-            msg = self.core.xmpp.make_message(self.get_dest_jid())
-            msg['type'] = self.message_type
-            msg['chat_state'] = state
-            self.chat_state = state
-            msg.send()
+            if config.get_by_tabname('send_chat_states', 'true', self.general_jid, True) and \
+                    self.remote_wants_chatstates is not False:
+                msg = self.core.xmpp.make_message(self.get_dest_jid())
+                msg['type'] = self.message_type
+                msg['chat_state'] = state
+                self.chat_state = state
+                msg.send()
 
     def send_composing_chat_state(self, empty_after):
         """