Add directional border::Radius helpers

core/src/border.rs

@@ -114,6 +114,26 @@ pub fn bottom_left(value: impl Into<Pixels>) -> Radius {
     Radius::default().bottom_left(value)
 }
 
+/// Creates a new [`Radius`] with the given value as top left and top right.
+pub fn top(value: impl Into<Pixels>) -> Radius {
+    Radius::default().top(value)
+}
+
+/// Creates a new [`Radius`] with the given value as bottom left and bottom right.
+pub fn bottom(value: impl Into<Pixels>) -> Radius {
+    Radius::default().bottom(value)
+}
+
+/// Creates a new [`Radius`] with the given value as top left and bottom left.
+pub fn left(value: impl Into<Pixels>) -> Radius {
+    Radius::default().left(value)
+}
+
+/// Creates a new [`Radius`] with the given value as top right and bottom right.
+pub fn right(value: impl Into<Pixels>) -> Radius {
+    Radius::default().right(value)
+}
+
 impl Radius {
     /// Creates a new [`Radius`] with the same value for each corner.
     pub fn new(value: impl Into<Pixels>) -> Self {
@@ -158,6 +178,50 @@ impl Radius {
             ..self
         }
     }
+
+    /// Sets the top left and top right values of the [`Radius`].
+    pub fn top(self, value: impl Into<Pixels>) -> Self {
+        let value = value.into().0;
+
+        Self {
+            top_left: value,
+            top_right: value,
+            ..self
+        }
+    }
+
+    /// Sets the bottom left and bottom right values of the [`Radius`].
+    pub fn bottom(self, value: impl Into<Pixels>) -> Self {
+        let value = value.into().0;
+
+        Self {
+            bottom_left: value,
+            bottom_right: value,
+            ..self
+        }
+    }
+
+    /// Sets the top left and bottom left values of the [`Radius`].
+    pub fn left(self, value: impl Into<Pixels>) -> Self {
+        let value = value.into().0;
+
+        Self {
+            top_left: value,
+            bottom_left: value,
+            ..self
+        }
+    }
+
+    /// Sets the top right and bottom right values of the [`Radius`].
+    pub fn right(self, value: impl Into<Pixels>) -> Self {
+        let value = value.into().0;
+
+        Self {
+            top_right: value,
+            bottom_right: value,
+            ..self
+        }
+    }
 }
 
 impl From<f32> for Radius {

core/src/border_radius.rs

@@ -1,22 +0,0 @@
-/// The border radii for the corners of a graphics primitive in the order:
-/// top-left, top-right, bottom-right, bottom-left.
-#[derive(Debug, Clone, Copy, PartialEq, Default)]
-pub struct BorderRadius([f32; 4]);
-
-impl From<f32> for BorderRadius {
-    fn from(w: f32) -> Self {
-        Self([w; 4])
-    }
-}
-
-impl From<[f32; 4]> for BorderRadius {
-    fn from(radi: [f32; 4]) -> Self {
-        Self(radi)
-    }
-}
-
-impl From<BorderRadius> for [f32; 4] {
-    fn from(radi: BorderRadius) -> Self {
-        radi.0
-    }
-}