don't fail when we get chat / normal messages from a room_jid. Fixes #5276

src/dialogs.py

@@ -2503,6 +2503,13 @@ class SingleMessageWindow:
 
 	def on_single_message_window_destroy(self, widget):
 		self.instances.remove(self)
+		c = gajim.contacts.get_contact_with_highest_priority(self.account,
+			self.from_whom)
+		if c.is_groupchat() and not self.from_whom in \
+		gajim.interface.minimized_controls[self.account] and self.action == \
+		'receive' and gajim.events.get_nb_roster_events(self.account,
+		self.from_whom, types=['chat', 'normal']) == 0:
+			gajim.interface.roster.remove_groupchat(self.from_whom, self.account)
 
 	def set_cursor_to_end(self):
 		end_iter = self.message_tv_buffer.get_end_iter()

src/roster_window.py

@@ -807,6 +807,11 @@ class RosterWindow:
 			gajim.contacts.add_contact(account, contact)
 			self.add_contact(jid, account)
 		else:
+			if jid not in gajim.interface.minimized_controls[account]:
+				# there is a window that we can minimize
+				gc_control = gajim.interface.msg_win_mgr.get_gc_control(jid,
+					account)
+				gajim.interface.minimized_controls[account][jid] = gc_control
 			contact.show = show
 			contact.status = status
 			self.adjust_and_draw_contact_context(jid, account)
@@ -2919,6 +2924,12 @@ class RosterWindow:
 	def on_groupchat_maximized(self, widget, jid, account):
 		'''When a groupchat is maximised'''
 		if not jid in gajim.interface.minimized_controls[account]:
+			# Already opened?
+			gc_control = gajim.interface.msg_win_mgr.get_gc_control(jid, account)
+			if gc_control:
+				mw = gajim.interface.msg_win_mgr.get_window(jid, account)
+				mw.set_active_tab(gc_control)
+				mw.window.window.focus()
 			return
 		ctrl = gajim.interface.minimized_controls[account][jid]
 		mw = gajim.interface.msg_win_mgr.get_window(jid, account)

src/session.py

@@ -250,7 +250,7 @@ class ChatControlSession(stanza_session.EncryptedStanzaSession):
 
 		if self.control:
 			parent_win = self.control.parent_win
-			if self.control == parent_win.get_active_control() and \
+			if parent_win and self.control == parent_win.get_active_control() and \
 			parent_win.window.has_focus:
 				focused = True