Merge pull request #1086 from davep/drop-prenamed-mount

Drop support for anonymous vs named widget mounting

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [0.4.0] - Unreleased
 
+### Changed
+
+- Dropped support for mounting "named" and "anonymous" widgets via
+  `App.mount` and `Widget.mount`. Both methods now simply take one or more
+  widgets as positional arguments.
+
 ### Added
 
 - Added `init` param to reactive.watch

src/textual/app.py

@@ -822,27 +822,27 @@ class App(Generic[ReturnType], DOMNode):
         self._require_stylesheet_update.add(self.screen if node is None else node)
         self.check_idle()
 
-    def mount(self, *anon_widgets: Widget, **widgets: Widget) -> AwaitMount:
-        """Mount widgets. Widgets specified as positional args, or keywords args. If supplied
-        as keyword args they will be assigned an id of the key.
+    def mount(self, *widgets: Widget) -> AwaitMount:
+        """Mount the given widgets.
+
+        Args:
+            *widgets (Widget): The widget(s) to mount.
 
         Returns:
             AwaitMount: An awaitable object that waits for widgets to be mounted.
-
         """
-        mounted_widgets = self._register(self.screen, *anon_widgets, **widgets)
-        return AwaitMount(mounted_widgets)
+        return AwaitMount(self._register(self.screen, *widgets))
 
     def mount_all(self, widgets: Iterable[Widget]) -> AwaitMount:
         """Mount widgets from an iterable.
 
         Args:
             widgets (Iterable[Widget]): An iterable of widgets.
+
+        Returns:
+            AwaitMount: An awaitable object that waits for widgets to be mounted.
         """
-        mounted_widgets = list(widgets)
-        for widget in mounted_widgets:
-            self._register(self.screen, widget)
-        return AwaitMount(mounted_widgets)
+        return self.mount(*widgets)
 
     def is_screen_installed(self, screen: Screen | str) -> bool:
         """Check if a given screen has been installed.
@@ -1300,37 +1300,33 @@ class App(Generic[ReturnType], DOMNode):
             return True
         return False
 
-    def _register(
-        self, parent: DOMNode, *anon_widgets: Widget, **widgets: Widget
-    ) -> list[Widget]:
+    def _register(self, parent: DOMNode, *widgets: Widget) -> list[Widget]:
         """Register widget(s) so they may receive events.
 
         Args:
-            parent (Widget): Parent Widget.
+            parent (DOMNode): Parent node.
+            *widgets: The widget(s) to register.
 
         Returns:
             list[Widget]: List of modified widgets.
 
         """
-        if not anon_widgets and not widgets:
+
+        if not widgets:
             return []
-        name_widgets: list[tuple[str | None, Widget]]
-        name_widgets = [*((None, widget) for widget in anon_widgets), *widgets.items()]
+
         apply_stylesheet = self.stylesheet.apply
 
-        for widget_id, widget in name_widgets:
+        for widget in widgets:
             if not isinstance(widget, Widget):
                 raise AppError(f"Can't register {widget!r}; expected a Widget instance")
             if widget not in self._registry:
-                if widget_id is not None:
-                    widget.id = widget_id
                 self._register_child(parent, widget)
                 if widget.children:
                     self._register(widget, *widget.children)
                 apply_stylesheet(widget)
 
-        registered_widgets = [widget for _, widget in name_widgets]
-        return registered_widgets
+        return list(widgets)
 
     def _unregister(self, widget: Widget) -> None:
         """Unregister a widget.

src/textual/dom.py

@@ -609,21 +609,16 @@ class DOMNode(MessagePump):
         self.children._append(node)
         node._attach(self)
 
-    def _add_children(self, *nodes: Widget, **named_nodes: Widget) -> None:
+    def _add_children(self, *nodes: Widget) -> None:
         """Add multiple children to this node.
 
         Args:
             *nodes (DOMNode): Positional args should be new DOM nodes.
-            **named_nodes (DOMNode): Keyword args will be assigned the argument name as an ID.
         """
         _append = self.children._append
         for node in nodes:
             node._attach(self)
             _append(node)
-        for node_id, node in named_nodes.items():
-            node._attach(self)
-            _append(node)
-            node.id = node_id
 
     WalkType = TypeVar("WalkType")
 

src/textual/widget.py

@@ -375,23 +375,16 @@ class Widget(DOMNode):
         if self._scrollbar_corner is not None:
             yield self._scrollbar_corner
 
-    def mount(self, *anon_widgets: Widget, **widgets: Widget) -> AwaitMount:
+    def mount(self, *widgets: Widget) -> AwaitMount:
         """Mount child widgets (making this widget a container).
 
-        Widgets may be passed as positional arguments or keyword arguments. If keyword arguments,
-        the keys will be set as the Widget's id.
-
-        Example:
-            ```python
-            self.mount(Static("hello"), header=Header())
-            ```
+        Args:
+            *widgets (Widget): The widget(s) to mount.
 
         Returns:
             AwaitMount: An awaitable object that waits for widgets to be mounted.
-
         """
-        mounted_widgets = self.app._register(self, *anon_widgets, **widgets)
-        return AwaitMount(mounted_widgets)
+        return AwaitMount(self.app._register(self, *widgets))
 
     def compose(self) -> ComposeResult:
         """Called by Textual to create child widgets.