fix triple clicks

CHANGELOG.md

@@ -5,19 +5,21 @@ 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/).
 
-## Unreleased
+## [7.3.0] - 2026-01-15
 
-### Changed
+### Fixed
+
+- Fixed triple click on command palette raising an exception https://github.com/Textualize/textual/pull/6329
 
-- Allow `Sparkline` to be of any height, not just 1 https://github.com/Textualize/textual/pull/6171
-- 
 ### Added
 
 - Added `DOM.query_one_optional`
+- Added `default` parameter to `get_component_rich_style` get_component_rich_style
 
 ### Changed
 
 - Added super+c (command on mac) alternative bindings for copy, for terminals that support it (Ghostty does)
+- Allow `Sparkline` to be of any height, not just 1 https://github.com/Textualize/textual/pull/6171
 
 ## [7.2.0] - 2026-01-11
 
@@ -3320,6 +3322,7 @@ 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
 
+[7.3.0]: https://github.com/Textualize/textual/compare/v7.2.0...v7.3.0
 [7.2.0]: https://github.com/Textualize/textual/compare/v7.1.0...v7.2.0
 [7.1.0]: https://github.com/Textualize/textual/compare/v7.0.3...v7.1.0
 [7.0.3]: https://github.com/Textualize/textual/compare/v7.0.2...v7.0.3

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "textual"
-version = "7.2.0"
+version = "7.3.0"
 homepage = "https://github.com/Textualize/textual"
 repository = "https://github.com/Textualize/textual"
 documentation = "https://textual.textualize.io/"

src/textual/command.py

@@ -524,7 +524,7 @@ class CommandPalette(SystemModalScreen[None]):
 
     AUTO_FOCUS = "CommandInput"
 
-    COMPONENT_CLASSES: ClassVar[set[str]] = {
+    COMPONENT_CLASSES: ClassVar[set[str]] = Screen.COMPONENT_CLASSES | {
         "command-palette--help-text",
         "command-palette--highlight",
     }

src/textual/dom.py

@@ -25,6 +25,7 @@
 
 import rich.repr
 from rich.highlighter import ReprHighlighter
+from rich.style import NULL_STYLE as RICH_NULL_STYLE
 from rich.style import Style
 from rich.text import Text
 from rich.tree import Tree
@@ -1072,7 +1073,9 @@ def text_style(self) -> Style:
     @property
     def selection_style(self) -> Style:
         """The style of selected text."""
-        style = self.screen.get_component_rich_style("screen--selection")
+        style = self.screen.get_component_rich_style(
+            "screen--selection", default=RICH_NULL_STYLE
+        )
         return style
 
     @property

src/textual/visual.py

@@ -10,6 +10,7 @@
 from rich.measure import Measurement
 from rich.protocol import is_renderable, rich_cast
 from rich.segment import Segment
+from rich.style import NULL_STYLE as RICH_NULL_STYLE
 from rich.style import Style as RichStyle
 from rich.text import Text
 
@@ -219,7 +220,9 @@ def to_strips(
         selection = widget.text_selection
         if selection is not None:
             selection_style: Style | None = Style.from_rich_style(
-                widget.screen.get_component_rich_style("screen--selection")
+                widget.screen.get_component_rich_style(
+                    "screen--selection", default=RICH_NULL_STYLE
+                )
             )
         else:
             selection_style = None

src/textual/widget.py

@@ -1140,19 +1140,32 @@ def get_child_by_type(self, expect_type: type[ExpectType]) -> ExpectType:
                 return child
         raise NoMatches(f"No immediate child of type {expect_type}; {self._nodes}")
 
-    def get_component_rich_style(self, *names: str, partial: bool = False) -> Style:
+    def get_component_rich_style(
+        self, *names: str, partial: bool = False, default: Style | None = None
+    ) -> Style:
         """Get a *Rich* style for a component.
 
         Args:
             names: Names of components.
             partial: Return a partial style (not combined with parent).
+            default: A Style to return if any component style doesn't exist.
+
+        Raises:
+            KeyError: If a component style doesn't exist, and no `default` is provided.
 
         Returns:
             A Rich style object.
         """
 
         if names not in self._rich_style_cache:
-            component_styles = self.get_component_styles(*names)
+            if default is None:
+                component_styles = self.get_component_styles(*names)
+            else:
+                try:
+                    component_styles = self.get_component_styles(*names)
+                except KeyError:
+                    return default
+
             style = component_styles.rich_style
             text_opacity = component_styles.text_opacity
             if text_opacity < 1 and style.bgcolor is not None: