add button

crates/theme/src/lib.rs

@@ -20,7 +20,7 @@ pub use ramps::{AccentShades, Oklch};
 pub use resolve::{Ramps, ResolvedTheme};
 pub use system::{AccessibilityPreferences, PartialPalette, SourceKind, SystemTheme};
 
-use gpui::{App, Global, WindowAppearance};
+use gpui::{App, Global, Pixels, WindowAppearance, px};
 
 /// Light or dark, resolved from the system appearance.
 #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, serde::Deserialize)]
@@ -46,11 +46,35 @@ pub struct Theme {
     pub variant: ThemeVariant,
     pub colors: ColorTokens,
     pub ramps: Ramps,
+    pub radius: Radius,
     pub accessibility: AccessibilityPreferences,
 }
 
 impl Global for Theme {}
 
+/// Corner radii components paint from; grows one class at a time.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct Radius {
+    pub control: Pixels,
+}
+
+impl Default for Radius {
+    fn default() -> Self {
+        Self { control: px(6.) }
+    }
+}
+
+/// Reads the resolved theme global from any app context.
+pub trait ActiveTheme {
+    fn theme(&self) -> &Theme;
+}
+
+impl ActiveTheme for App {
+    fn theme(&self) -> &Theme {
+        Theme::global(self)
+    }
+}
+
 impl Theme {
     /// Reads the theme global. Panics before `init`.
     pub fn global(cx: &App) -> &Self {
@@ -62,6 +86,7 @@ impl Theme {
             variant: resolved.variant,
             colors: resolved.colors,
             ramps: resolved.ramps,
+            radius: resolved.radius,
             accessibility: resolved.accessibility,
         }
     }