Migrated packages/react-native-reanimated java->kotlin

packages/react-native-reanimated/android/build.gradle

@@ -150,6 +150,11 @@ if (project == rootProject) {
 apply plugin: "com.android.library"
 apply plugin: "maven-publish"
 apply plugin: "de.undercouch.download"
+apply plugin: 'org.jetbrains.kotlin.android'
+
+if (project != rootProject) {
+    apply plugin: "org.jetbrains.kotlin.android"
+}
 
 android {
     compileSdkVersion safeExtGet("compileSdkVersion", 36)
@@ -242,6 +247,14 @@ android {
         sourceCompatibility JavaVersion.VERSION_17
         targetCompatibility JavaVersion.VERSION_17
     }
+    kotlinOptions {
+        jvmTarget = '17'
+    }
+    if (project != rootProject) {
+        kotlinOptions {
+            jvmTarget = '17'
+        }
+    }
     tasks.withType(ExternalNativeBuildJsonTask).tap {
         configureEach { compileTask ->
             compileTask.doLast {
@@ -334,6 +347,8 @@ dependencies {
     implementation "androidx.core:core:1.15.0"
 
     implementation "com.facebook.react:react-android" // version substituted by RNGP
+    implementation "androidx.core:core-ktx:1.17.0"
+    implementation 'androidx.core:core-ktx:1.18.0'
 
     if (project == rootProject) {
         // This is needed for linting in Reanimated's repo.

packages/react-native-reanimated/android/src/main/java/com/swmansion/common/GestureHandlerStateManager.kt

@@ -0,0 +1,5 @@
+package com.swmansion.common
+
+interface GestureHandlerStateManager {
+  fun setGestureHandlerState(handlerTag: Int, newState: Int)
+}

packages/react-native-reanimated/android/src/main/java/com/swmansion/reanimated/CopiedEvent.kt

@@ -0,0 +1,36 @@
+package com.swmansion.reanimated
+
+import com.facebook.react.bridge.WritableArray
+import com.facebook.react.bridge.WritableMap
+import com.facebook.react.uimanager.events.Event
+import com.facebook.react.uimanager.events.RCTEventEmitter
+
+class CopiedEvent(event: Event<*>) {
+  var targetTag: Int = 0
+    private set
+
+  var eventName: String = ""
+    private set
+
+  var payload: WritableMap? = null
+    private set
+
+  init {
+    event.dispatch(
+        object : RCTEventEmitter {
+          override fun receiveEvent(targetTag: Int, eventName: String, event: WritableMap?) {
+            this@CopiedEvent.targetTag = targetTag
+            this@CopiedEvent.eventName = eventName
+            this@CopiedEvent.payload = event?.copy()
+          }
+
+          override fun receiveTouches(
+              eventName: String,
+              touches: WritableArray,
+              changedIndices: WritableArray
+          ) {
+            // noop
+          }
+        })
+  }
+}

packages/react-native-reanimated/android/src/main/java/com/swmansion/reanimated/DevMenuUtils.kt

@@ -0,0 +1,22 @@
+package com.swmansion.reanimated
+
+import com.facebook.react.ReactApplication
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.devsupport.interfaces.DevOptionHandler
+
+object DevMenuUtils {
+  @JvmStatic
+  fun addDevMenuOption(context: ReactApplicationContext, handler: DevOptionHandler) {
+    // In Expo, `ApplicationContext` is not an instance of `ReactApplication`
+    if (context.applicationContext is ReactApplication) {
+      val devSupportManager =
+          (context.applicationContext as ReactApplication).reactHost!!.devSupportManager
+
+      if (devSupportManager != null) {
+        devSupportManager.addCustomDevOption("Toggle slow animations (Reanimated)", handler)
+      } else {
+        throw RuntimeException("[Reanimated] DevSupportManager is not available")
+      }
+    }
+  }
+}

packages/react-native-reanimated/android/src/main/java/com/swmansion/reanimated/DrawPassDetector.kt

@@ -0,0 +1,69 @@
+package com.swmansion.reanimated
+
+import android.os.Handler
+import android.os.Looper
+import android.view.View
+import android.view.ViewTreeObserver
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.UiThreadUtil
+
+/** Tracks whether the current UI thread turn is inside a draw pass. */
+internal class DrawPassDetector(private val mContext: ReactApplicationContext) {
+  private val mHandler = Handler(Looper.getMainLooper())
+  private val mClearRunnable = Runnable { mIsInDrawPass = false }
+  private var mIsInDrawPass = false
+  private var mDecorView: View? = null
+
+  private val mOnDrawListener = ViewTreeObserver.OnDrawListener {
+    mIsInDrawPass = true
+    mHandler.postAtFrontOfQueue(mClearRunnable)
+  }
+
+  fun initialize() {
+    val activity = mContext.currentActivity ?: return
+
+    val decorView = activity.window.decorView
+    if (decorView === mDecorView) {
+      return
+    }
+
+    // Decor view has changed (e.g. Activity recreated) — detach from the old one first.
+    mDecorView?.let { oldView ->
+      val oldObserver = oldView.viewTreeObserver
+      if (oldObserver.isAlive) {
+        oldObserver.removeOnDrawListener(mOnDrawListener)
+      }
+      mDecorView = null
+    }
+
+    val observer = decorView.viewTreeObserver
+    if (!observer.isAlive) {
+      return
+    }
+
+    mDecorView = decorView
+    observer.addOnDrawListener(mOnDrawListener)
+  }
+
+  fun isInDrawPass(): Boolean = mIsInDrawPass
+
+  fun invalidate() {
+    if (UiThreadUtil.isOnUiThread()) {
+      invalidateOnUiThread()
+    } else {
+      mHandler.post { invalidateOnUiThread() }
+    }
+  }
+
+  private fun invalidateOnUiThread() {
+    mDecorView?.let { view ->
+      val observer = view.viewTreeObserver
+      if (observer.isAlive) {
+        observer.removeOnDrawListener(mOnDrawListener)
+      }
+      mDecorView = null
+    }
+    mHandler.removeCallbacks(mClearRunnable)
+    mIsInDrawPass = false
+  }
+}

packages/react-native-reanimated/android/src/main/java/com/swmansion/reanimated/MapUtils.kt

@@ -0,0 +1,25 @@
+package com.swmansion.reanimated
+
+import com.facebook.react.bridge.JSApplicationCausedNativeException
+import com.facebook.react.bridge.NoSuchKeyException
+import com.facebook.react.bridge.ReadableMap
+
+object MapUtils {
+  @JvmStatic
+  fun getInt(map: ReadableMap, name: String, errorMsg: String): Int {
+    try {
+      return map.getInt(name)
+    } catch (e: NoSuchKeyException) {
+      throw JSApplicationCausedNativeException(errorMsg)
+    }
+  }
+
+  @JvmStatic
+  fun getString(map: ReadableMap, name: String, errorMsg: String): String? {
+    try {
+      return map.getString(name)
+    } catch (e: NoSuchKeyException) {
+      throw JSApplicationCausedNativeException(errorMsg)
+    }
+  }
+}