tree: Start expanded with Textual 0.73+

A backwards-incompatible change released in Textual 0.73 causes the
`memray tree` reporter to start with no nodes expanded. Work around this
to preserve the old behavior of expanding the first child of each node.

Signed-off-by: Matt Wozniski <[email protected]>

Author: godlygeek

news/648.bugfix.rst

@@ -0,0 +1 @@
+A backwards-incompatible change released in Textual 0.73 caused the ``memray tree`` reporter to start with no nodes expanded. This release adds a workaround to restore the old behavior of expanding the first child of each node.

src/memray/reporters/tree.py

@@ -277,7 +277,9 @@ def repopulate_tree(self, tree: FrameTree) -> None:
         self.add_children(tree.root, self.data.children.values())
         self.add_elided_locations_node(tree.root)
         tree.root.expand()
-        tree.select_node(tree.root)
+        # From Textual 0.73 on, Tree.select_node toggles the node's expanded
+        # state. The new Tree.move_cursor method selects without expanding.
+        getattr(tree, "move_cursor", tree.select_node)(tree.root)
         self.expand_first_child(tree.root)
 
     def action_expand_linear_group(self) -> None: