feat: implement LayoutGesture

.agents/skills/openswiftui-test-authoring/SKILL.md

@@ -20,6 +20,8 @@ description: Route OpenSwiftUI test authoring and review work to the appropriate
 - Follow the organization and naming of the nearest tests in the same target.
 - Sort import declarations alphabetically by imported module name, preserving any
   attributes attached to each declaration.
+- Mark suites/tests that contain AI-generated Swift Testing tests with `.tags(.aigc)`
+  on `@Suite` or `@Test`. Also add `import OpenSwiftUITestsSupport` if not imported yet.
 - In Swift Testing, prefer `@Test(arguments:)` when cases share the same test
   body. Keep different behaviors in separate tests.
 - Give argument collections explicit types when inference is ambiguous,

Sources/OpenSwiftUICore/Event/Gesture/GestureInputs.swift

@@ -83,6 +83,15 @@ public struct _GestureInputs {
         }
     }
 
+    package var position: Attribute<ViewOrigin> {
+        let defaultPosition = intern(ViewOrigin.zero, id: .defaultValue)
+        return viewSubgraph.apply {
+            let position = IndirectAttribute(source: defaultPosition)
+            position.source = viewInputs.position
+            return position.projectedValue
+        }
+    }
+
     package var size: Attribute<ViewSize> {
         let defaultSize = intern(ViewSize.zero, id: .defaultValue)
         return viewSubgraph.apply {