Function to serialize tab state as session

kitty/tabs.py

@@ -288,6 +288,24 @@ def serialize_state(self) -> dict[str, Any]:
             'name': self.name,
         }
 
+    def serialize_state_as_session(self) -> list[str]:
+        import shlex
+        self._current_layout_name
+        ans = [
+            f'new_tab {self.name}'.rstrip(),
+            f'layout {self._current_layout_name}',
+            f'enabled_layouts {",".join(self.enabled_layouts)}'
+        ]
+        launch_cmds = []
+        for g in self.windows.iter_groups_in_activation_order():
+            gw: list[str] = []
+            for window in g:
+                lc = window.as_launch_command(is_overlay=bool(gw))
+                if lc:
+                    gw.append(shlex.join(lc))
+            launch_cmds.extend(gw)
+        return (ans + launch_cmds) if launch_cmds else []
+
     def active_window_changed(self) -> None:
         w = self.active_window
         set_active_window(self.os_window_id, self.id, 0 if w is None else w.id)

kitty/window.py

@@ -1943,7 +1943,7 @@ def current_mouse_position(self) -> Optional['MousePosition']:
         ' Return the last position at which a mouse event was received by this window '
         return get_mouse_data_for_window(self.os_window_id, self.tab_id, self.id)
 
-    def as_launch_command(self) -> list[str]:
+    def as_launch_command(self, is_overlay: bool = False) -> list[str]:
         ' Return a launch command that can be used to serialize this window. Empty list indicates not serializable. '
         if self.actions_on_close or self.actions_on_focus_change or self.actions_on_removal:
             # such windows are typically UI kittens. The actions are not
@@ -1996,7 +1996,7 @@ def as_launch_command(self) -> list[str]:
                 lpos = (f'{ypos}-{xpos}' if ypos else xpos) if xpos else ypos
             ans.append(f'--logo-position={lpos}')
 
-        if self.overlay_parent is not None:
+        if is_overlay:
             t = 'overlay-main' if self.overlay_type is OverlayType.main else 'overlay'
             ans.append(f'--type={t}')
 

kitty/window_list.py

@@ -333,6 +333,12 @@ def make_previous_group_active(self, which: int = 1, notify: bool = True) -> Non
                     return
         self.set_active_group_idx(len(self.groups) - 1, notify=notify)
 
+    def iter_groups_in_activation_order(self) -> Iterator[WindowGroup]:
+        imap = {gid: i for i, gid in enumerate(self.active_group_history)}
+        def skey(g: WindowGroup) -> int:
+            return imap.get(g.id, -1)
+        yield from sorted(self.groups, key=skey)
+
     @property
     def num_groups(self) -> int:
         return len(self.groups)