Refactor theme selection (add search_themes)

Author: darrenburns

src/textual/app.py

@@ -1536,12 +1536,7 @@ async def run_callback() -> CallThreadReturnType:
 
     def action_change_theme(self) -> None:
         """An [action](/guide/actions) to change the current theme."""
-        self.app.push_screen(
-            CommandPalette(
-                [ThemeProvider],
-                placeholder="Search for themes…",
-            ),
-        )
+        self.search_themes()
 
     def action_screenshot(
         self, filename: str | None = None, path: str | None = None
@@ -1673,6 +1668,18 @@ def search(
             )
         )
 
+    def search_themes(self) -> None:
+        """Show a fuzzy search command palette containing all registered themes.
+
+        Selecting a theme in the list will change the app's theme.
+        """
+        self.push_screen(
+            CommandPalette(
+                providers=[ThemeProvider],
+                placeholder="Search for themes…",
+            ),
+        )
+
     def bind(
         self,
         keys: str,

src/textual/command.py

@@ -342,9 +342,7 @@ class SimpleCommand(NamedTuple):
     """The description of the command."""
 
 
-CommandListItem: TypeAlias = (
-    "SimpleCommand | tuple[str, IgnoreReturnCallbackType, str | None] | tuple[str, IgnoreReturnCallbackType]"
-)
+CommandListItem: TypeAlias = "SimpleCommand | tuple[str, IgnoreReturnCallbackType, str | None] | tuple[str, IgnoreReturnCallbackType]"
 
 
 class SimpleProvider(Provider):
@@ -357,7 +355,6 @@ def __init__(
     ) -> None:
         # Convert all commands to SimpleCommand instances
         super().__init__(screen, None)
-        print("setting commands")
         self._commands: list[SimpleCommand] = []
         for command in commands:
             if isinstance(command, SimpleCommand):