minor cleanups before MotionTransition review

Sources/Animator/MotionCoreAnimationViewContext.swift

@@ -277,6 +277,7 @@ fileprivate extension MotionCoreAnimationViewContext {
                 }
             } else {
                 let sizeRatio = oldSize / newSize
+                
                 for v in view.subviews {
                     let center = v.center
                     let size = v.bounds.size

Sources/MotionTargetState.swift

@@ -29,6 +29,9 @@
 import UIKit
 
 public struct MotionTargetState {
+    /// The identifier value to match source and destination views.
+    public var motionIdentifier: String?
+    
     /// The initial state that the transition will start at.
     internal var beginState: [MotionModifier]?
     
@@ -106,9 +109,6 @@ public struct MotionTargetState {
     /// The arc curve value.
     public var arc: CGFloat?
     
-    /// The identifier value to match source and destination views.
-    public var motionIdentifier: String?
-    
     /// The cascading animation settings.
     public var cascade: (TimeInterval, CascadeDirection, Bool)?
 

Sources/Preprocessors/ConditionalPreprocessor.swift

@@ -47,11 +47,11 @@ public struct MotionConditionalContext {
     }
     
     public var isMatched: Bool {
-        return matchedView != nil
+        return nil != matchedView
     }
     
     public var isAncestorViewMatched: Bool {
-        return matchedAncestorView != nil
+        return nil != matchedAncestorView
     }
     
     public var matchedView: UIView? {
@@ -101,9 +101,9 @@ class ConditionalPreprocessor: MotionCorePreprocessor {
                 continue
             }
             
-            for (condition, transitions) in conditionalModifiers {
+            for (condition, modifiers) in conditionalModifiers {
                 if condition(MotionConditionalContext(motion: motion, view: v, isAppearing: isAppearing)) {
-                    context[v]!.append(contentsOf: transitions)
+                    context[v]!.append(contentsOf: modifiers)
                 }
             }
         }

Sources/Preprocessors/IgnoreSubviewModifiersPreprocessor.swift

@@ -63,20 +63,20 @@ class IgnoreSubviewTransitionsPreprocessor: MotionCorePreprocessor {
                 continue
             }
             
-            cleanSubviewTransitions(for: parentView)
+            cleanSubviewModifiers(for: parentView)
         }
     }
 }
 
 fileprivate extension IgnoreSubviewTransitionsPreprocessor {
     /**
-     Clears the transition for a given view's subviews.
+     Clears the modifiers for a given view's subviews.
      - Parameter for view: A UIView.
      */
-    func cleanSubviewTransitions(for view: UIView) {
+    func cleanSubviewModifiers(for view: UIView) {
         for v in view.subviews {
             context[v] = nil
-            cleanSubviewTransitions(for: v)
+            cleanSubviewModifiers(for: v)
         }
     }
 }

Sources/Preprocessors/SourcePreprocessor.swift

@@ -44,7 +44,7 @@ class SourcePreprocessor: MotionCorePreprocessor {
         }
         
         for tv in toViews {
-            guard let i = context[tv]?.motionIdentifier, let fv = context.sourceView(for: i) else {
+            guard let motionIdentifier = context[tv]?.motionIdentifier, let fv = context.sourceView(for: motionIdentifier) else {
                 continue
             }