Fixed PurpleKingdomGames#642: Can mapLayers on SUF

mprevel · Nov 26, 2023 · a3f6bcd · a3f6bcd
1 parent d733e57
commit a3f6bcd
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diff --git a/indigo/indigo/src/main/scala/indigo/shared/scenegraph/SceneUpdateFragment.scala b/indigo/indigo/src/main/scala/indigo/shared/scenegraph/SceneUpdateFragment.scala
@@ -57,6 +57,9 @@ final case class SceneUpdateFragment(
   def withLayers(layers: Layer*): SceneUpdateFragment =
     withLayers(layers.toBatch)
 
+  def mapLayers(f: Layer => Layer): SceneUpdateFragment =
+    this.copy(layers = layers.map(f))
+
   def noLights: SceneUpdateFragment =
     this.copy(lights = Batch.empty)
 

diff --git a/indigo/indigo/src/test/scala/indigo/shared/scenegraph/SceneUpdateFragmentTests.scala b/indigo/indigo/src/test/scala/indigo/shared/scenegraph/SceneUpdateFragmentTests.scala
@@ -148,4 +148,18 @@ class SceneUpdateFragmentTests extends munit.FunSuite {
         fail("match failed")
   }
 
+  test("Map over layers") {
+    val scene =
+      SceneUpdateFragment.empty
+        .addLayer(Layer(BindingKey("key A")).withMagnification(1))
+        .addLayer(Layer(BindingKey("key B")).withMagnification(1))
+
+    val actual =
+      scene.mapLayers(l => l.withKey(BindingKey(l.key.map(_.toString).getOrElse("!") + "?")).withMagnification(2))
+
+    assert(actual.layers.length == 2)
+    assertEquals(actual.layers.map(_.key.get).toList, List(BindingKey("key A?"), BindingKey("key B?")))
+    assertEquals(actual.layers.map(_.magnification.get).toList, List(2, 2))
+  }
+
 }