refactor: Change layout of chat page

Add new Chat Stack to aid in the upcoming refactor

gajim/gtk/chat_page.py

@@ -34,6 +34,7 @@
 from .chat_filter import ChatFilter
 from .chat_list import ChatList
 from .chat_list_stack import ChatListStack
+from .chat_stack import ChatStack
 from .control_stack import ControlStack
 from .search_view import SearchView
 from .types import ControlT
@@ -57,8 +58,10 @@ def __init__(self):
         self.add(self._ui.paned)
         self._ui.connect_signals(self)
 
-        self._control_stack = ControlStack()
-        self._ui.right_grid_overlay.add(self._control_stack)
+        self._chat_stack = ChatStack()
+        self._ui.right_grid_overlay.add(self._chat_stack)
+
+        self._control_stack = self._chat_stack.get_control_stack()
 
         self._search_view = SearchView()
         self._search_view.connect('hide-search', self._on_search_hide)

gajim/gtk/chat_stack.py

+# This file is part of Gajim.
+#
+# Gajim is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published
+# by the Free Software Foundation; version 3 only.
+#
+# Gajim is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
+
+import logging
+
+from gi.repository import Gtk
+
+from .control_stack import ControlStack
+from .util import EventHelper
+
+log = logging.getLogger('gajim.gui.chatstack')
+
+
+class ChatStack(Gtk.Stack, EventHelper):
+    def __init__(self):
+        Gtk.Stack.__init__(self)
+        EventHelper.__init__(self)
+
+        self.set_vexpand(True)
+        self.set_hexpand(True)
+
+        self._control_stack = ControlStack()
+
+        box = Gtk.Box()
+        box.add(self._control_stack)
+
+        self.add_named(box, 'controls')
+
+        self.show_all()
+
+    def get_control_stack(self) -> ControlStack:
+        return self._control_stack

pyrightconfig.json

@@ -61,6 +61,7 @@
         "gajim/gtk/chat_list_stack.py",
         "gajim/gtk/chat_list.py",
         "gajim/gtk/chat_page.py",
+        "gajim/gtk/chat_stack.py",
         "gajim/gtk/control_stack.py",
         "gajim/gtk/const.py",
         "gajim/gtk/contact_info.py",