fix: closing an application now works even if the application is not …

…the root of its hierarchy

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## Upcoming
+
+- fix: closing an application now works even if the application is not the root of its hierarchy
+
 ## Version 0.13.9
 
 - refactor: set parent of `StackApplicationItem`s like `StackMenuItem`s

ubo_gui/menu/menu_widget.py

@@ -601,30 +601,29 @@ def close_application(self: MenuWidget, application: PageWidget) -> None:
         # If any of these applications are the top of the stack, remove it with `pop` to
         # ensure the animation is played.
         with self.stack_lock:
-            if any(
-                isinstance(item.root, StackApplicationItem)
-                and item.root.application is application
+            to_be_removed = [
+                cast(StackApplicationItem, item)
                 for item in self.stack
-            ):
-                to_be_removed = [
-                    cast(StackApplicationItem, item)
-                    for item in self.stack
-                    if isinstance(item.root, StackApplicationItem)
-                    and item.root.application is application
-                    and item is not self.top
-                ]
-
-                for item in to_be_removed:
+                if any(
+                    isinstance(item, StackApplicationItem)
+                    and item.application is application
+                    for item in item.lineage
+                )
+            ]
+
+            for item in to_be_removed:
+                if item is not self.top:
                     item.clear_subscriptions()
                     item.application.dispatch('on_close')
 
-                self.stack = [item for item in self.stack if item not in to_be_removed]
+            self.stack = [
+                item
+                for item in self.stack
+                if item not in to_be_removed or item is self.top
+            ]
 
-                if (
-                    isinstance(self.top.root, StackApplicationItem)
-                    and self.top.root.application is application
-                ):
-                    self._pop()
+            if self.top in to_be_removed:
+                self._pop()
 
     @property
     def root(self: MenuWidget) -> StackMenuItem:

ubo_gui/menu/stack_item.py

@@ -2,9 +2,9 @@
 
 from __future__ import annotations
 
-from collections.abc import Sequence
+from collections.abc import Generator, Sequence
 from dataclasses import dataclass, field
-from typing import TYPE_CHECKING, Self, TypeVar, cast
+from typing import TYPE_CHECKING, Self, TypeVar
 
 if TYPE_CHECKING:
     from collections.abc import Callable
@@ -31,11 +31,19 @@ def clear_subscriptions(self: BaseStackItem) -> None:
             unsubscribe()
 
     @property
-    def root(self: BaseStackItem) -> StackMenuItem:
+    def root(self: BaseStackItem) -> BaseStackItem:
         """Return the root item."""
         if self.parent:
             return self.parent.root
-        return cast(StackMenuItem, self)
+        return self
+
+    @property
+    def lineage(self: BaseStackItem) -> Generator[BaseStackItem, None, None]:
+        """A generator iterating from the current item to its root."""
+        current = self
+        while current:
+            yield current
+            current = current.parent
 
     @property
     def title(self: Self) -> str: