convert ViewUtil to Kotlin (facebook#43799)

Summary:
Pull Request resolved: facebook#43799

convert Java to Kotlin: `/react/uimanager/common/ViewUtil.java`

Changelog:
[Internal] internal

Reviewed By: cortinico

Differential Revision: D55651762

fbshipit-source-id: 26896a41df8efec9fa032f0e16e3e50342dd54f8

Author: alanleedev

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -5393,12 +5393,12 @@ public abstract interface annotation class com/facebook/react/uimanager/common/U
 	public static final field FABRIC I
 }
 
-public class com/facebook/react/uimanager/common/ViewUtil {
+public final class com/facebook/react/uimanager/common/ViewUtil {
+	public static final field INSTANCE Lcom/facebook/react/uimanager/common/ViewUtil;
 	public static final field NO_SURFACE_ID I
-	public fun <init> ()V
-	public static fun getUIManagerType (I)I
-	public static fun getUIManagerType (II)I
-	public static fun isRootTag (I)Z
+	public static final fun getUIManagerType (I)I
+	public static final fun getUIManagerType (II)I
+	public static final fun isRootTag (I)Z
 }
 
 public abstract interface class com/facebook/react/uimanager/debug/NotThreadSafeViewHierarchyUpdateDebugListener {

…ook/react/uimanager/common/ViewUtil.java …ebook/react/uimanager/common/ViewUtil.ktpackages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/common/ViewUtil.java renamed to packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/common/ViewUtil.kt packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/common/ViewUtil.java renamed to packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/common/ViewUtil.kt

@@ -5,38 +5,38 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-package com.facebook.react.uimanager.common;
+package com.facebook.react.uimanager.common
 
-import static com.facebook.react.uimanager.common.UIManagerType.DEFAULT;
-import static com.facebook.react.uimanager.common.UIManagerType.FABRIC;
+import com.facebook.react.uimanager.common.UIManagerType.DEFAULT
+import com.facebook.react.uimanager.common.UIManagerType.FABRIC
 
-import com.facebook.infer.annotation.Nullsafe;
-
-@Nullsafe(Nullsafe.Mode.LOCAL)
-public class ViewUtil {
-
-  public static final int NO_SURFACE_ID = -1;
+public object ViewUtil {
 
+  public const val NO_SURFACE_ID: Int = -1
   /**
    * Counter for uniquely identifying views. - % 2 === 0 means it is a Fabric tag. See
    * https://github.com/facebook/react/pull/12587
    *
-   * @param viewTag {@link int} tag of the view this is event is dispatched to
+   * @param viewTag [int] tag of the view this is event is dispatched to
    */
+  @JvmStatic
   @UIManagerType
-  public static int getUIManagerType(int viewTag) {
-    if (viewTag % 2 == 0) return FABRIC;
-    return DEFAULT;
-  }
+  public fun getUIManagerType(viewTag: Int): Int =
+      if (viewTag % 2 == 0) {
+        FABRIC
+      } else {
+        DEFAULT
+      }
 
   /**
    * Version of getUIManagerType that uses both surfaceId and viewTag heuristics
    *
-   * @param viewTag {@link int} tag of the view this is event is dispatched to
-   * @param surfaceId {@link int} ID of the corresponding surface
+   * @param viewTag [int] tag of the view this is event is dispatched to
+   * @param surfaceId [int] ID of the corresponding surface
    */
+  @JvmStatic
   @UIManagerType
-  public static int getUIManagerType(int viewTag, int surfaceId) {
+  public fun getUIManagerType(viewTag: Int, surfaceId: Int): Int {
     // We have a contract that Fabric events *always* have a SurfaceId passed in, and non-Fabric
     // events NEVER have a SurfaceId passed in (the default/placeholder of -1 is passed in instead).
     //
@@ -47,21 +47,19 @@ public static int getUIManagerType(int viewTag, int surfaceId) {
     // non-Fabric UIManager, and we cannot use the ViewTag for inference since it's not controlled
     // by RN and is essentially a random number.
     // At some point it would be great to pass the SurfaceContext here instead.
-    @UIManagerType int uiManagerType = (surfaceId == -1 ? DEFAULT : FABRIC);
-    if (uiManagerType == DEFAULT && !ViewUtil.isRootTag(viewTag)) {
+    @UIManagerType val uiManagerType = if (surfaceId == -1) DEFAULT else FABRIC
+    if (uiManagerType == DEFAULT && !isRootTag(viewTag)) {
       // TODO (T123064648): Some events for Fabric still didn't have the surfaceId set, so if it's
       // not a React RootView, double check if the tag belongs to Fabric.
-      if (viewTag % 2 == 0) return FABRIC;
+      if (viewTag % 2 == 0) {
+        return FABRIC
+      }
     }
-    return uiManagerType;
+    return uiManagerType
   }
-
   /**
-   * @param viewTag {@link int} react tag
+   * @param viewTag [int] react tag
    * @return if the react tag received by parameter is a RootTag or not.
    */
-  @Deprecated
-  public static boolean isRootTag(int viewTag) {
-    return viewTag % 10 == 1;
-  }
+  @JvmStatic public fun isRootTag(viewTag: Int): Boolean = viewTag % 10 == 1
 }