Directory tree fixes

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [8.0.2] - 2026-03-03
+
+### Changed
+
+- Themes are now in alphabetical order in command palette https://github.com/Textualize/textual/pull/6405
+
+### Fixed
+
+- Fixed issues with Directory Tree https://github.com/Textualize/textual/pull/6405
+
 ## [8.0.1] - 2026-03-01
 
 ### Fixed
@@ -3360,6 +3370,7 @@ https://textual.textualize.io/blog/2022/11/08/version-040/#version-040
 - New handler system for messages that doesn't require inheritance
 - Improved traceback handling
 
+[8.0.2]: https://github.com/Textualize/textual/compare/v8.0.1...v8.0.2
 [8.0.1]: https://github.com/Textualize/textual/compare/v8.0.0...v8.0.1
 [8.0.0]: https://github.com/Textualize/textual/compare/v7.5.0...v8.0.0
 [7.5.0]: https://github.com/Textualize/textual/compare/v7.4.0...v7.5.0

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "textual"
-version = "8.0.1"
+version = "8.0.2"
 homepage = "https://github.com/Textualize/textual"
 repository = "https://github.com/Textualize/textual"
 documentation = "https://textual.textualize.io/"

src/textual/theme.py

@@ -2,6 +2,7 @@
 
 from dataclasses import dataclass, field
 from functools import partial
+from operator import attrgetter
 from typing import Callable
 
 from textual.command import DiscoveryHit, Hit, Hits, Provider
@@ -475,7 +476,7 @@ def set_app_theme(name: str) -> None:
 
         return [
             (theme.name, partial(set_app_theme, theme.name))
-            for theme in themes.values()
+            for theme in sorted(themes.values(), key=attrgetter("name"))
             if theme.name != "textual-ansi"
         ]
 

src/textual/widgets/_directory_tree.py

@@ -465,7 +465,7 @@ def _safe_is_dir(path: Path) -> bool:
         """
         try:
             return path.is_dir()
-        except PermissionError:
+        except OSError:
             # We may or may not have been looking at a directory, but we
             # don't have the rights or permissions to even know that. Best
             # we can do, short of letting the error blow up, is assume it's
@@ -505,7 +505,7 @@ def _directory_content(self, location: Path, worker: Worker) -> Iterator[Path]:
                 if worker.is_cancelled:
                     break
                 yield entry
-        except PermissionError:
+        except OSError:
             pass
 
     @work(thread=True, exit_on_error=False)
@@ -526,14 +526,15 @@ def _load_directory(self, node: TreeNode[DirEntry]) -> list[Path]:
             key=lambda path: (not self._safe_is_dir(path), path.name.lower()),
         )
 
-    @work()
+    @work(exclusive=True, group="_loader")
     async def _loader(self) -> None:
         """Background loading queue processor."""
         worker = get_current_worker()
+        load_queue = self._load_queue
         while not worker.is_cancelled:
             # Get the next node that needs loading off the queue. Note that
             # this blocks if the queue is empty.
-            node = await self._load_queue.get()
+            node = await load_queue.get()
             content: list[Path] = []
             async with self.lock:
                 cursor_node = self.cursor_node
@@ -557,25 +558,28 @@ async def _loader(self) -> None:
                         if cursor_node is not None:
                             self.move_cursor(cursor_node, animate=False)
                 finally:
-                    # Mark this iteration as done.
-                    self._load_queue.task_done()
+                    load_queue.task_done()
 
     async def _on_tree_node_expanded(self, event: Tree.NodeExpanded[DirEntry]) -> None:
         event.stop()
         dir_entry = event.node.data
         if dir_entry is None:
             return
         if await asyncio.to_thread(self._safe_is_dir, dir_entry.path):
-            await self._add_to_load_queue(event.node)
+            if event.node.data is not None:
+                await self._add_to_load_queue(event.node)
         else:
-            self.post_message(self.FileSelected(event.node, dir_entry.path))
+            if event.node.data is not None:
+                self.post_message(self.FileSelected(event.node, dir_entry.path))
 
     async def _on_tree_node_selected(self, event: Tree.NodeSelected[DirEntry]) -> None:
         event.stop()
         dir_entry = event.node.data
         if dir_entry is None:
             return
         if await asyncio.to_thread(self._safe_is_dir, dir_entry.path):
-            self.post_message(self.DirectorySelected(event.node, dir_entry.path))
+            if event.node.data is not None:
+                self.post_message(self.DirectorySelected(event.node, dir_entry.path))
         else:
-            self.post_message(self.FileSelected(event.node, dir_entry.path))
+            if event.node.data is not None:
+                self.post_message(self.FileSelected(event.node, dir_entry.path))