auto links optimization

CHANGELOG.md

@@ -5,6 +5,12 @@ 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/).
 
+## [7.0.3] - 2026-01-10
+
+### Fixed
+
+- Fixed performance issue with large scrollable containers https://github.com/Textualize/textual/pull/6317
+
 ## [7.0.2] - 2026-01-09
 
 ### Fixed
@@ -3284,6 +3290,7 @@ 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
 
+[7.0.3]: https://github.com/Textualize/textual/compare/v7.0.2...v7.0.3
 [7.0.2]: https://github.com/Textualize/textual/compare/v7.0.1...v7.0.2
 [7.0.1]: https://github.com/Textualize/textual/compare/v7.0.0...v7.0.1
 [7.0.0]: https://github.com/Textualize/textual/compare/v6.11.0...v7.0.0

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "textual"
-version = "7.0.2"
+version = "7.0.3"
 homepage = "https://github.com/Textualize/textual"
 repository = "https://github.com/Textualize/textual"
 documentation = "https://textual.textualize.io/"

src/textual/css/stylesheet.py

@@ -723,9 +723,15 @@ def update_nodes(self, nodes: Iterable[DOMNode], animate: bool = False) -> None:
         for node in nodes:
             apply(node, animate=animate, cache=cache)
             if isinstance(node, Widget) and node.is_scrollable:
-                if node.show_vertical_scrollbar:
+                show_vertical_scrollbar = (
+                    node.show_vertical_scrollbar and node.scrollbar_size_vertical
+                )
+                show_horizontal_scrollbar = (
+                    node.show_horizontal_scrollbar and node.scrollbar_size_horizontal
+                )
+                if show_vertical_scrollbar:
                     apply(node.vertical_scrollbar, cache=cache)
-                if node.show_horizontal_scrollbar:
+                if show_horizontal_scrollbar:
                     apply(node.horizontal_scrollbar, cache=cache)
-                if node.show_horizontal_scrollbar and node.show_vertical_scrollbar:
+                if show_horizontal_scrollbar and show_vertical_scrollbar:
                     apply(node.scrollbar_corner, cache=cache)

src/textual/scrollbar.py

@@ -258,7 +258,7 @@ def __init__(
         self.thickness = thickness
         self.grabbed_position: float = 0
         super().__init__(name=name)
-        self.auto_links = False
+        self.set_reactive(ScrollBar.auto_links, False)
 
     window_virtual_size: Reactive[int] = Reactive(100)
     window_size: Reactive[int] = Reactive(0)
@@ -274,6 +274,10 @@ def __rich_repr__(self) -> rich.repr.Result:
         if self.thickness > 1:
             yield "thickness", self.thickness
 
+    def validate_position(self, position: float) -> float:
+        """Position has a granulatory of 1/8 of a cell."""
+        return int(position * 8) / 8
+
     def render(self) -> RenderableType:
         assert self.parent is not None
         styles = self.parent.styles

src/textual/visual.py

@@ -235,7 +235,10 @@ def to_strips(
                 selection_style,
             ),
         )
-        strips = [strip._apply_link_style(widget.link_style) for strip in strips]
+        if widget.auto_links and not widget.is_container:
+            # TODO: This is suprisingly expensive (why?)
+            link_style = widget.link_style
+            strips = [strip._apply_link_style(link_style) for strip in strips]
 
         if height is None:
             height = len(strips)

src/textual/widget.py

@@ -349,7 +349,7 @@ class Widget(DOMNode):
     loading: Reactive[bool] = Reactive(False)
     """If set to `True` this widget will temporarily be replaced with a loading indicator."""
 
-    virtual_size: Reactive[Size] = Reactive(Size(0, 0), layout=True)
+    virtual_size = Reactive(Size(0, 0), layout=True)
     """The virtual (scrollable) [size][textual.geometry.Size] of the widget."""
 
     has_focus: Reactive[bool] = Reactive(False, repaint=False)
@@ -1903,12 +1903,14 @@ def watch_hover_style(
             self.highlight_link_id = hover_style.link_id
 
     def watch_scroll_x(self, old_value: float, new_value: float) -> None:
-        self.horizontal_scrollbar.position = new_value
+        if self.show_horizontal_scrollbar:
+            self.horizontal_scrollbar.position = new_value
         if round(old_value) != round(new_value):
             self._refresh_scroll()
 
     def watch_scroll_y(self, old_value: float, new_value: float) -> None:
-        self.vertical_scrollbar.position = new_value
+        if self.show_vertical_scrollbar:
+            self.vertical_scrollbar.position = new_value
         if self._anchored and self._anchor_released:
             self._check_anchor()
         if round(old_value) != round(new_value):
@@ -2644,8 +2646,6 @@ def _set_dirty(self, *regions: Region) -> None:
             self._dirty_regions.clear()
             self._repaint_regions.clear()
             self._styles_cache.clear()
-            self._styles_cache.set_dirty(self.size.region)
-
             outer_size = self.outer_size
             self._dirty_regions.add(outer_size.region)
             if outer_size:
@@ -4092,13 +4092,13 @@ def _scroll_update(self, virtual_size: Size) -> None:
         self._refresh_scrollbars()
         width, height = self.container_size
 
-        if self.show_vertical_scrollbar:
+        if self.show_vertical_scrollbar and self.styles.scrollbar_size_vertical:
             self.vertical_scrollbar.window_virtual_size = virtual_size.height
             self.vertical_scrollbar.window_size = (
                 height - self.scrollbar_size_horizontal
             )
             self.vertical_scrollbar.refresh()
-        if self.show_horizontal_scrollbar:
+        if self.show_horizontal_scrollbar and self.styles.scrollbar_size_horizontal:
             self.horizontal_scrollbar.window_virtual_size = virtual_size.width
             self.horizontal_scrollbar.window_size = width - self.scrollbar_size_vertical
             self.horizontal_scrollbar.refresh()

src/textual/widgets/_footer.py

@@ -96,7 +96,7 @@ def __init__(
         if disabled:
             classes += " -disabled"
         super().__init__(classes=classes)
-        self.shrink = False
+        self.set_reactive(Widget.shrink, False)
         if tooltip:
             self.tooltip = tooltip
 
@@ -260,7 +260,8 @@ def __init__(
             disabled=disabled,
         )
         self.set_reactive(Footer.show_command_palette, show_command_palette)
-        self.compact = compact
+        self.set_reactive(Footer.compact, compact)
+        self.set_class(compact, "-compact", update=False)
 
     def compose(self) -> ComposeResult:
         if not self._bindings_ready:

src/textual/widgets/_static.py

@@ -44,8 +44,8 @@ def __init__(
         super().__init__(
             name=name, id=id, classes=classes, disabled=disabled, markup=markup
         )
-        self.expand = expand
-        self.shrink = shrink
+        self.set_reactive(Widget.expand, expand)
+        self.set_reactive(Widget.shrink, shrink)
         self.__content = content
         self.__visual: Visual | None = None