Add impl From<Color> for Gradient

niri-config/src/lib.rs

@@ -530,6 +530,18 @@ pub struct Gradient {
     pub in_: GradientInterpolation,
 }
 
+impl From<Color> for Gradient {
+    fn from(value: Color) -> Self {
+        Self {
+            from: value,
+            to: value,
+            angle: 0,
+            relative_to: GradientRelativeTo::Window,
+            in_: GradientInterpolation::default(),
+        }
+    }
+}
+
 #[derive(knuffel::DecodeScalar, Debug, Default, Clone, Copy, PartialEq, Eq)]
 pub enum GradientRelativeTo {
     #[default]

src/layout/focus_ring.rs

@@ -1,7 +1,7 @@
 use std::iter::zip;
 
 use arrayvec::ArrayVec;
-use niri_config::{CornerRadius, Gradient, GradientInterpolation, GradientRelativeTo};
+use niri_config::{CornerRadius, Gradient, GradientRelativeTo};
 use smithay::backend::renderer::element::Kind;
 use smithay::utils::{Logical, Point, Rectangle, Size};
 
@@ -86,13 +86,7 @@ impl FocusRing {
         self.use_border_shader = radius != CornerRadius::default() || gradient.is_some();
 
         // Set the defaults for solid color + rounded corners.
-        let gradient = gradient.unwrap_or(Gradient {
+        let gradient = gradient.unwrap_or_else(|| Gradient::from(color));
-            from: color,
-            to: color,
-            angle: 0,
-            relative_to: GradientRelativeTo::Window,
-            in_: GradientInterpolation::default(),
-        });
 
         let full_rect = Rectangle::new(Point::from((-width, -width)), self.full_size);
         let gradient_area = match gradient.relative_to {