Convert react/uimanager/*Util.java -> Kotlin (#43729)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/43729

# Changelog:
[Internal] -

As in the title, converts corresponding type declarations in `react/uimanager/*Util.kt` to Kotlin.

Reviewed By: tdn120

Differential Revision: D55574531

fbshipit-source-id: 974234bd57c77e863aa723388e48ffc455e73a96

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

@@ -4025,9 +4025,9 @@ public abstract interface class com/facebook/react/uimanager/FabricViewStateMana
 	public abstract fun getStateUpdate ()Lcom/facebook/react/bridge/WritableMap;
 }
 
-public class com/facebook/react/uimanager/FloatUtil {
-	public fun <init> ()V
-	public static fun floatsEqual (FF)Z
+public final class com/facebook/react/uimanager/FloatUtil {
+	public static final field INSTANCE Lcom/facebook/react/uimanager/FloatUtil;
+	public static final fun floatsEqual (FF)Z
 }
 
 public abstract class com/facebook/react/uimanager/GuardedFrameCallback : android/view/Choreographer$FrameCallback {
@@ -4213,15 +4213,16 @@ public class com/facebook/react/uimanager/OnLayoutEvent : com/facebook/react/uim
 	public fun onDispose ()V
 }
 
-public class com/facebook/react/uimanager/PixelUtil {
-	public fun <init> ()V
-	public static fun getDisplayMetricDensity ()F
-	public static fun toDIPFromPixel (F)F
-	public static fun toPixelFromDIP (D)F
-	public static fun toPixelFromDIP (F)F
-	public static fun toPixelFromSP (D)F
-	public static fun toPixelFromSP (F)F
-	public static fun toPixelFromSP (FF)F
+public final class com/facebook/react/uimanager/PixelUtil {
+	public static final field INSTANCE Lcom/facebook/react/uimanager/PixelUtil;
+	public static final fun getDisplayMetricDensity ()F
+	public static final fun toDIPFromPixel (F)F
+	public static final fun toPixelFromDIP (D)F
+	public static final fun toPixelFromDIP (F)F
+	public static final fun toPixelFromSP (D)F
+	public static final fun toPixelFromSP (F)F
+	public static final fun toPixelFromSP (FF)F
+	public static synthetic fun toPixelFromSP$default (FFILjava/lang/Object;)F
 }
 
 public final class com/facebook/react/uimanager/PointerEvents : java/lang/Enum {
@@ -4776,10 +4777,10 @@ public class com/facebook/react/uimanager/RootViewManager$$PropsSetter : com/fac
 	public synthetic fun setProperty (Lcom/facebook/react/uimanager/ViewManager;Landroid/view/View;Ljava/lang/String;Ljava/lang/Object;)V
 }
 
-public class com/facebook/react/uimanager/RootViewUtil {
-	public fun <init> ()V
-	public static fun getRootView (Landroid/view/View;)Lcom/facebook/react/uimanager/RootView;
-	public static fun getViewportOffset (Landroid/view/View;)Landroid/graphics/Point;
+public final class com/facebook/react/uimanager/RootViewUtil {
+	public static final field INSTANCE Lcom/facebook/react/uimanager/RootViewUtil;
+	public static final fun getRootView (Landroid/view/View;)Lcom/facebook/react/uimanager/RootView;
+	public static final fun getViewportOffset (Landroid/view/View;)Landroid/graphics/Point;
 }
 
 public abstract class com/facebook/react/uimanager/SimpleViewManager : com/facebook/react/uimanager/BaseViewManager {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/FloatUtil.java

@@ -1,23 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.uimanager;
-
-import com.facebook.infer.annotation.Nullsafe;
-
-@Nullsafe(Nullsafe.Mode.LOCAL)
-public class FloatUtil {
-
-  private static final float EPSILON = .00001f;
-
-  public static boolean floatsEqual(float f1, float f2) {
-    if (Float.isNaN(f1) || Float.isNaN(f2)) {
-      return Float.isNaN(f1) && Float.isNaN(f2);
-    }
-    return Math.abs(f2 - f1) < EPSILON;
-  }
-}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/FloatUtil.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.uimanager
+
+import kotlin.math.abs
+
+public object FloatUtil {
+  private const val EPSILON = .00001f
+
+  @JvmStatic
+  public fun floatsEqual(f1: Float, f2: Float): Boolean {
+    return if (java.lang.Float.isNaN(f1) || java.lang.Float.isNaN(f2)) {
+      java.lang.Float.isNaN(f1) && java.lang.Float.isNaN(f2)
+    } else abs(f2 - f1) < EPSILON
+  }
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/PixelUtil.java

@@ -1,62 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.uimanager;
-
-import android.util.DisplayMetrics;
-import android.util.TypedValue;
-import com.facebook.infer.annotation.Nullsafe;
-
-/** Android dp to pixel manipulation */
-@Nullsafe(Nullsafe.Mode.LOCAL)
-public class PixelUtil {
-
-  /** Convert from DIP to PX */
-  public static float toPixelFromDIP(float value) {
-    return TypedValue.applyDimension(
-        TypedValue.COMPLEX_UNIT_DIP, value, DisplayMetricsHolder.getWindowDisplayMetrics());
-  }
-
-  /** Convert from DIP to PX */
-  public static float toPixelFromDIP(double value) {
-    return toPixelFromDIP((float) value);
-  }
-
-  /** Convert from SP to PX */
-  public static float toPixelFromSP(float value) {
-    return toPixelFromSP(value, Float.NaN);
-  }
-
-  /** Convert from SP to PX */
-  public static float toPixelFromSP(float value, float maxFontScale) {
-    DisplayMetrics displayMetrics = DisplayMetricsHolder.getWindowDisplayMetrics();
-    float scaledDensity = displayMetrics.scaledDensity;
-    float currentFontScale = scaledDensity / displayMetrics.density;
-    if (maxFontScale >= 1 && maxFontScale < currentFontScale) {
-      scaledDensity = displayMetrics.density * maxFontScale;
-    }
-
-    return value * scaledDensity;
-  }
-
-  /** Convert from SP to PX */
-  public static float toPixelFromSP(double value) {
-    return toPixelFromSP((float) value);
-  }
-
-  /** Convert from PX to DP */
-  public static float toDIPFromPixel(float value) {
-    return value / DisplayMetricsHolder.getWindowDisplayMetrics().density;
-  }
-
-  /**
-   * @return {@link float} that represents the density of the display metrics for device screen.
-   */
-  public static float getDisplayMetricDensity() {
-    return DisplayMetricsHolder.getWindowDisplayMetrics().density;
-  }
-}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/PixelUtil.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.uimanager
+
+import android.util.TypedValue
+
+/** Android dp to pixel manipulation */
+public object PixelUtil {
+  /** Convert from DIP to PX */
+  @JvmStatic
+  public fun toPixelFromDIP(value: Float): Float {
+    return TypedValue.applyDimension(
+        TypedValue.COMPLEX_UNIT_DIP, value, DisplayMetricsHolder.getWindowDisplayMetrics())
+  }
+
+  /** Convert from DIP to PX */
+  @JvmStatic
+  public fun toPixelFromDIP(value: Double): Float {
+    return toPixelFromDIP(value.toFloat())
+  }
+
+  /** Convert from SP to PX */
+  @JvmOverloads
+  @JvmStatic
+  public fun toPixelFromSP(value: Float, maxFontScale: Float = Float.NaN): Float {
+    val displayMetrics = DisplayMetricsHolder.getWindowDisplayMetrics()
+    var scaledDensity = displayMetrics.scaledDensity
+    val currentFontScale = scaledDensity / displayMetrics.density
+    if (maxFontScale >= 1 && maxFontScale < currentFontScale) {
+      scaledDensity = displayMetrics.density * maxFontScale
+    }
+    return value * scaledDensity
+  }
+
+  /** Convert from SP to PX */
+  @JvmStatic
+  public fun toPixelFromSP(value: Double): Float {
+    return toPixelFromSP(value.toFloat())
+  }
+
+  /** Convert from PX to DP */
+  @JvmStatic
+  public fun toDIPFromPixel(value: Float): Float {
+    return value / DisplayMetricsHolder.getWindowDisplayMetrics().density
+  }
+
+  /** @return [float] that represents the density of the display metrics for device screen. */
+  @JvmStatic
+  public fun getDisplayMetricDensity(): Float =
+      DisplayMetricsHolder.getWindowDisplayMetrics().density
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/RootViewUtil.java

@@ -1,49 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.uimanager;
-
-import android.graphics.Point;
-import android.graphics.Rect;
-import android.view.View;
-import android.view.ViewParent;
-import androidx.annotation.UiThread;
-import com.facebook.infer.annotation.Assertions;
-
-public class RootViewUtil {
-
-  /** Returns the root view of a given view in a react application. */
-  public static RootView getRootView(View reactView) {
-    View current = reactView;
-    while (true) {
-      if (current instanceof RootView) {
-        return (RootView) current;
-      }
-      ViewParent next = current.getParent();
-      if (next == null) {
-        return null;
-      }
-      Assertions.assertCondition(next instanceof View);
-      current = (View) next;
-    }
-  }
-
-  @UiThread
-  public static Point getViewportOffset(View v) {
-    int[] locationInWindow = new int[2];
-    v.getLocationInWindow(locationInWindow);
-
-    // we need to subtract visibleWindowCoords - to subtract possible window insets, split
-    // screen or multi window
-    Rect visibleWindowFrame = new Rect();
-    v.getWindowVisibleDisplayFrame(visibleWindowFrame);
-    locationInWindow[0] -= visibleWindowFrame.left;
-    locationInWindow[1] -= visibleWindowFrame.top;
-
-    return new Point(locationInWindow[0], locationInWindow[1]);
-  }
-}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/RootViewUtil.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.uimanager
+
+import android.graphics.Point
+import android.graphics.Rect
+import android.view.View
+import androidx.annotation.UiThread
+import com.facebook.infer.annotation.Assertions
+
+public object RootViewUtil {
+  /** Returns the root view of a given view in a react application. */
+  @JvmStatic
+  public fun getRootView(reactView: View): RootView? {
+    var current = reactView
+    while (true) {
+      if (current is RootView) {
+        return current
+      }
+      val next = current.parent ?: return null
+      Assertions.assertCondition(next is View)
+      current = next as View
+    }
+  }
+
+  @UiThread
+  @JvmStatic
+  public fun getViewportOffset(v: View): Point {
+    val locationInWindow = IntArray(2)
+    v.getLocationInWindow(locationInWindow)
+
+    // we need to subtract visibleWindowCoords - to subtract possible window insets, split
+    // screen or multi window
+    val visibleWindowFrame = Rect()
+    v.getWindowVisibleDisplayFrame(visibleWindowFrame)
+    locationInWindow[0] -= visibleWindowFrame.left
+    locationInWindow[1] -= visibleWindowFrame.top
+    return Point(locationInWindow[0], locationInWindow[1])
+  }
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/events/NativeGestureUtil.java

@@ -26,7 +26,10 @@ public class NativeGestureUtil {
    * @param event the MotionEvent that caused the gesture to be started
    */
   public static void notifyNativeGestureStarted(View view, MotionEvent event) {
-    RootViewUtil.getRootView(view).onChildStartedNativeGesture(view, event);
+    RootView rootView = RootViewUtil.getRootView(view);
+    if (rootView != null) {
+      rootView.onChildStartedNativeGesture(view, event);
+    }
   }
 
   /**