impl Clone for Box<dyn Gradient>

mazznoer · Aug 19, 2024 · fbff003 · fbff003
1 parent 684fa07
commit fbff003
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Showing 2 changed files with 26 additions and 1 deletion.
diff --git a/src/lib.rs b/src/lib.rs
@@ -150,7 +150,7 @@ pub enum BlendMode {
     Lab,
 }
 
-pub trait Gradient {
+pub trait Gradient: CloneGradient {
     /// Get color at certain position
     fn at(&self, t: f32) -> Color;
 
@@ -205,6 +205,25 @@ pub trait Gradient {
     }
 }
 
+pub trait CloneGradient {
+    fn clone_gradient(&self) -> Box<dyn Gradient>;
+}
+
+impl<T> CloneGradient for T
+where
+    T: Gradient + Clone + 'static,
+{
+    fn clone_gradient(&self) -> Box<dyn Gradient> {
+        Box::new(self.clone())
+    }
+}
+
+impl Clone for Box<dyn Gradient> {
+    fn clone(&self) -> Self {
+        self.clone_gradient()
+    }
+}
+
 fn convert_colors(colors: &[Color], mode: BlendMode) -> Vec<[f32; 4]> {
     colors
         .iter()

diff --git a/tests/gradient.rs b/tests/gradient.rs
@@ -138,3 +138,9 @@ fn colors() {
         &["#ff0000", "#808000", "#00ff00", "#008080", "#0000ff",]
     );
 }
+
+#[test]
+fn box_clone() {
+    let g: Box<dyn Gradient> = Box::new(GradientBuilder::new().build::<LinearGradient>().unwrap());
+    let _: Box<dyn Gradient> = g.clone();
+}