reworked TransitionPreprocessor

Sources/Preprocessors/CascadePreprocessor.swift

@@ -29,43 +29,34 @@
 import UIKit
 
 public enum CascadeDirection {
-  case topToBottom
-  case bottomToTop
-  case leftToRight
-  case rightToLeft
-  case radial(center:CGPoint)
-  case inverseRadial(center:CGPoint)
-  var comparator: (UIView, UIView) -> Bool {
-    switch self {
-    case .topToBottom:
-      return { return $0.frame.minY < $1.frame.minY }
-    case .bottomToTop:
-      return { return $0.frame.maxY == $1.frame.maxY ? $0.frame.maxX > $1.frame.maxX : $0.frame.maxY > $1.frame.maxY }
-    case .leftToRight:
-      return { return $0.frame.minX < $1.frame.minX }
-    case .rightToLeft:
-      return { return $0.frame.maxX > $1.frame.maxX }
-    case .radial(let center):
-      return { return $0.center.distance(center) < $1.center.distance(center) }
-    case .inverseRadial(let center):
-      return { return $0.center.distance(center) > $1.center.distance(center) }
-    }
-  }
-
-  init?(_ string: String) {
-    switch string {
-    case "bottomToTop":
-      self = .bottomToTop
-    case "leftToRight":
-      self = .leftToRight
-    case "rightToLeft":
-      self = .rightToLeft
-    case "topToBottom":
-      self = .topToBottom
-    default:
-      return nil
+    case topToBottom
+    case bottomToTop
+    case leftToRight
+    case rightToLeft
+    case radial(center:CGPoint)
+    case inverseRadial(center:CGPoint)
+  
+    var comparator: (UIView, UIView) -> Bool {
+        switch self {
+        case .topToBottom:
+            return { return $0.frame.minY < $1.frame.minY }
+    
+        case .bottomToTop:
+            return { return $0.frame.maxY == $1.frame.maxY ? $0.frame.maxX > $1.frame.maxX : $0.frame.maxY > $1.frame.maxY }
+        
+        case .leftToRight:
+            return { return $0.frame.minX < $1.frame.minX }
+    
+        case .rightToLeft:
+            return { return $0.frame.maxX > $1.frame.maxX }
+    
+        case .radial(let center):
+            return { return $0.center.distance(center) < $1.center.distance(center) }
+    
+        case .inverseRadial(let center):
+            return { return $0.center.distance(center) > $1.center.distance(center) }
+        }
     }
-  }
 }
 
 class CascadePreprocessor: MotionPreprocessor {