Add a new Reactive type for querying reactive properties.

Reviewers: O2 Material Motion, O4 Material Apple platform reviewers, #material_motion, randcode-generator

Reviewed By: randcode-generator

Tags: #material_motion

Differential Revision: http://codereview.cc/D3112

examples/ContextualTransitionExample.swift

@@ -285,7 +285,7 @@ private class PushBackTransition: Transition {
 
     let size = TransitionSpring(back: contextView.bounds.size, fore: fitSize, direction: ctx.direction)
     runtime.toggle(size, inReactionTo: draggable)
-    runtime.add(size, to: runtime.get(replicaView).reactiveLayer.size)
+    runtime.add(size, to: runtime.get(replicaView).layer.size)
 
     let opacity = TransitionSpring<CGFloat>(back: 0, fore: 1, direction: ctx.direction)
     runtime.add(opacity, to: runtime.get(ctx.fore.view.layer).opacity)

examples/FabTransitionExample.swift

@@ -124,14 +124,14 @@ private class CircularRevealTransition: Transition {
     let foreShadowPath = CGRect(origin: .zero(), size: expandedSize)
     let shadowPath = tween(back: floodFillView.layer.shadowPath!, fore: UIBezierPath(ovalIn: foreShadowPath).cgPath, ctx: ctx)
 
-    let floodLayer = runtime.get(floodFillView).reactiveLayer
+    let floodLayer = runtime.get(floodFillView).layer
     runtime.add(expansion, to: floodLayer.size)
     runtime.add(fadeOut, to: floodLayer.opacity)
     runtime.add(radius, to: floodLayer.cornerRadius)
     runtime.add(shadowPath, to: floodLayer.shadowPath)
 
     let shiftIn = tween(back: ctx.fore.view.layer.position.y + 40, fore: ctx.fore.view.layer.position.y, ctx: ctx)
-    runtime.add(shiftIn, to: runtime.get(ctx.fore.view).reactiveLayer.positionY)
+    runtime.add(shiftIn, to: runtime.get(ctx.fore.view).layer.positionY)
 
     let maskShiftIn = tween(back: CGFloat(-40), fore: CGFloat(0), ctx: ctx)
     runtime.add(maskShiftIn, to: runtime.get(maskLayer).positionY)

src/MotionRuntime.swift

@@ -170,24 +170,24 @@ public final class MotionRuntime {
   // MARK: Reactive object storage
 
   /**
-   Returns a reactive version of the given object and caches the returned result for future access.
+   Returns a reactive version of the given object.
    */
-  public func get(_ view: UIView) -> ReactiveUIView {
-    return get(view) { .init($0, runtime: self) }
+  public func get(_ view: UIView) -> Reactive<UIView> {
+    return Reactive(view)
   }
 
   /**
-   Returns a reactive version of the given object and caches the returned result for future access.
+   Returns a reactive version of the given object.
    */
-  public func get(_ layer: CALayer) -> ReactiveCALayer {
-    return get(layer) { .init($0) }
+  public func get(_ layer: CALayer) -> Reactive<CALayer> {
+    return Reactive(layer)
   }
 
   /**
-   Returns a reactive version of the given object and caches the returned result for future access.
+   Returns a reactive version of the given object.
    */
-  public func get(_ layer: CAShapeLayer) -> ReactiveCAShapeLayer {
-    return get(layer) { .init($0) }
+  public func get(_ layer: CAShapeLayer) -> Reactive<CAShapeLayer> {
+    return Reactive(layer)
   }
 
   /**

src/interactions/Draggable.swift

@@ -69,7 +69,7 @@ public final class Draggable: Gesturable<UIPanGestureRecognizer>, Interaction, T
     guard let gestureRecognizer = dequeueGestureRecognizer(withReactiveView: reactiveView) else {
       return
     }
-    let position = reactiveView.reactiveLayer.position
+    let position = reactiveView.layer.position
 
     runtime.connect(enabled, to: ReactiveProperty(initialValue: gestureRecognizer.isEnabled) { enabled in
       gestureRecognizer.isEnabled = enabled

src/interactions/Rotatable.swift

@@ -38,7 +38,7 @@ public final class Rotatable: Gesturable<UIRotationGestureRecognizer>, Interacti
     guard let gestureRecognizer = dequeueGestureRecognizer(withReactiveView: reactiveView) else {
       return
     }
-    let rotation = reactiveView.reactiveLayer.rotation
+    let rotation = reactiveView.layer.rotation
 
     runtime.connect(enabled, to: ReactiveProperty(initialValue: gestureRecognizer.isEnabled) { enabled in
       gestureRecognizer.isEnabled = enabled

src/interactions/Scalable.swift

@@ -38,7 +38,7 @@ public final class Scalable: Gesturable<UIPinchGestureRecognizer>, Interaction,
     guard let gestureRecognizer = dequeueGestureRecognizer(withReactiveView: reactiveView) else {
       return
     }
-    let scale = reactiveView.reactiveLayer.scale
+    let scale = reactiveView.layer.scale
 
     runtime.connect(enabled, to: ReactiveProperty(initialValue: gestureRecognizer.isEnabled) { enabled in
       gestureRecognizer.isEnabled = enabled

src/protocols/Gesturable.swift

@@ -124,13 +124,13 @@ public class Gesturable<T: UIGestureRecognizer> {
   /**
    Prepares and returns the gesture recognizer that should be used to drive this interaction.
    */
-  func dequeueGestureRecognizer(withReactiveView reactiveView: ReactiveUIView) -> T? {
+  func dequeueGestureRecognizer(withReactiveView reactiveView: Reactive<UIView>) -> T? {
     let gestureRecognizer = self.nextGestureRecognizer
     _nextGestureRecognizer = nil
 
     switch config {
     case .registerNewRecognizerToTargetView:
-      reactiveView.view.addGestureRecognizer(gestureRecognizer!)
+      reactiveView._object.addGestureRecognizer(gestureRecognizer!)
     default: ()
     }