Revert "Cleanup all the JSC 1st party code. (#51949)"

This reverts commit 8174d02.

Author: cipolleschi

packages/gradle-plugin/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/utils/NdkConfiguratorUtils.kt

@@ -126,8 +126,6 @@ internal object NdkConfiguratorUtils {
   ): Pair<List<String>, List<String>> {
     val excludes = mutableListOf<String>()
     val includes = mutableListOf<String>()
-
-    // note: libjsctooling.so is kept here for backward compatibility.
     when {
       hermesEnabled -> {
         excludes.add("**/libjsc.so")

packages/react-native/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm

@@ -1230,7 +1230,10 @@ - (NSString *)accessibilityLabel
     return label;
   }
 
-  return RCTRecursiveAccessibilityLabel(self.currentContainerView);
+  if (self.isAccessibilityElement) {
+    return RCTRecursiveAccessibilityLabel(self.currentContainerView);
+  }
+  return nil;
 }
 
 - (NSString *)accessibilityLabelForCoopting

packages/react-native/React/Views/RCTView.m

@@ -240,7 +240,10 @@ - (NSString *)accessibilityLabel
   if (label) {
     return label;
   }
-  return RCTRecursiveAccessibilityLabel(self);
+  if (self.isAccessibilityElement) {
+    return RCTRecursiveAccessibilityLabel(self);
+  }
+  return nil;
 }
 
 - (NSArray<UIAccessibilityCustomAction *> *)accessibilityCustomActions

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

@@ -2448,6 +2448,19 @@ public abstract interface class com/facebook/react/interfaces/fabric/ReactSurfac
 	public abstract fun stop ()Lcom/facebook/react/interfaces/TaskInterface;
 }
 
+public final class com/facebook/react/jscexecutor/JSCExecutor : com/facebook/react/bridge/JavaScriptExecutor {
+	public fun getName ()Ljava/lang/String;
+	public static final fun loadLibrary ()V
+}
+
+public final class com/facebook/react/jscexecutor/JSCExecutorFactory : com/facebook/react/bridge/JavaScriptExecutorFactory {
+	public fun <init> (Ljava/lang/String;Ljava/lang/String;)V
+	public fun create ()Lcom/facebook/react/bridge/JavaScriptExecutor;
+	public fun startSamplingProfiler ()V
+	public fun stopSamplingProfiler (Ljava/lang/String;)V
+	public fun toString ()Ljava/lang/String;
+}
+
 public final class com/facebook/react/jstasks/HeadlessJsTaskConfig {
 	public fun <init> (Lcom/facebook/react/jstasks/HeadlessJsTaskConfig;)V
 	public fun <init> (Ljava/lang/String;Lcom/facebook/react/bridge/WritableMap;)V
@@ -3122,6 +3135,10 @@ public class com/facebook/react/runtime/CoreReactPackage$$ReactModuleInfoProvide
 	public fun getReactModuleInfos ()Ljava/util/Map;
 }
 
+public final class com/facebook/react/runtime/JSCInstance : com/facebook/react/runtime/JSRuntimeFactory {
+	public fun <init> ()V
+}
+
 public abstract class com/facebook/react/runtime/JSRuntimeFactory {
 	public fun <init> (Lcom/facebook/jni/HybridData;)V
 }
@@ -3236,6 +3253,10 @@ public final class com/facebook/react/soloader/OpenSourceMergedSoMapping : com/f
 	public final fun libhermes_executor_so ()I
 	public final fun libhermesinstancejni_so ()I
 	public final fun libhermestooling_so ()I
+	public final fun libjscexecutor_so ()I
+	public final fun libjscinstance_so ()I
+	public final fun libjscruntime_so ()I
+	public final fun libjsctooling_so ()I
 	public final fun libjsijniprofiler_so ()I
 	public final fun libjsinspector_so ()I
 	public final fun libmapbufferjni_so ()I

packages/react-native/ReactAndroid/build.gradle.kts

@@ -87,6 +87,8 @@ val preparePrefab by
                       // hermes_executor
                       // This prefab targets is used by Expo & Reanimated
                       Pair("../ReactCommon/hermes/inspector-modern/", "hermes/inspector-modern/"),
+                      // jscexecutor
+                      Pair("../ReactCommon/jsc/", "jsc/"),
                       // fabricjni
                       Pair("src/main/jni/react/fabric", "react/fabric/"),
                       // glog
@@ -234,6 +236,10 @@ val preparePrefab by
                   "hermestooling",
                   // hermes_executor
                   Pair("../ReactCommon/hermes/inspector-modern/", "hermes/inspector-modern/")),
+              PrefabPreprocessingEntry(
+                  "jsctooling",
+                  // jsc
+                  Pair("../ReactCommon/jsc/", "jsc/")),
           ))
       outputDir.set(prefabHeadersDir)
     }
@@ -528,6 +534,7 @@ android {
             "reactnative",
             "jsi",
             "hermestooling",
+            "jsctooling",
         )
       }
     }
@@ -576,9 +583,10 @@ android {
     resources.excludes.add("META-INF/LICENSE")
     // We intentionally don't want to bundle any JS Runtime inside the Android AAR
     // we produce. The reason behind this is that we want to allow users to pick the
-    // JS engine by specifying a dependency on either `hermes-engine` or other engines
+    // JS engine by specifying a dependency on either `hermes-engine` or `android-jsc`
     // that will include the necessary .so files to load.
     jniLibs.excludes.add("**/libhermes.so")
+    jniLibs.excludes.add("**/libjsc.so")
   }
 
   buildFeatures {
@@ -591,6 +599,7 @@ android {
     create("jsi") { headers = File(prefabHeadersDir, "jsi").absolutePath }
     create("reactnative") { headers = File(prefabHeadersDir, "reactnative").absolutePath }
     create("hermestooling") { headers = File(prefabHeadersDir, "hermestooling").absolutePath }
+    create("jsctooling") { headers = File(prefabHeadersDir, "jsctooling").absolutePath }
   }
 
   publishing {
@@ -635,9 +644,10 @@ dependencies {
   compileOnly(libs.javax.annotation.api)
   api(libs.javax.inject)
 
-  // It's up to the consumer to decide if hermes or other engines should be included or not.
-  // Therefore hermes-engine is a compileOnly dependencies.
+  // It's up to the consumer to decide if hermes/jsc should be included or not.
+  // Therefore hermes-engine and jsc are compileOnly dependencies.
   compileOnly(project(":packages:react-native:ReactAndroid:hermes-engine"))
+  compileOnly(libs.jsc.android)
 
   testImplementation(libs.junit)
   testImplementation(libs.assertj)

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/defaults/DefaultReactHost.kt

@@ -17,6 +17,7 @@ import com.facebook.react.common.annotations.UnstableReactNativeAPI
 import com.facebook.react.common.build.ReactBuildConfig
 import com.facebook.react.fabric.ComponentFactory
 import com.facebook.react.runtime.BindingsInstaller
+import com.facebook.react.runtime.JSCInstance
 import com.facebook.react.runtime.JSRuntimeFactory
 import com.facebook.react.runtime.ReactHostImpl
 import com.facebook.react.runtime.cxxreactpackage.CxxReactPackage
@@ -207,7 +208,7 @@ public object DefaultReactHost {
           jsMainModulePath,
           jsBundleAssetPath,
           jsBundleFilePath,
-          HermesInstance(),
+          if (isHermesEnabled) HermesInstance() else JSCInstance(),
           useDevSupport,
           cxxReactPackageProviders,
           exceptionHandler,
@@ -263,7 +264,7 @@ public object DefaultReactHost {
           jsMainModulePath,
           jsBundleAssetPath,
           jsBundleFilePath,
-          HermesInstance(),
+          if (isHermesEnabled) HermesInstance() else JSCInstance(),
           useDevSupport,
           cxxReactPackageProviders,
       )

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/defaults/DefaultReactNativeHost.kt

@@ -17,6 +17,7 @@ import com.facebook.react.bridge.UIManagerProvider
 import com.facebook.react.common.annotations.UnstableReactNativeAPI
 import com.facebook.react.fabric.ComponentFactory
 import com.facebook.react.fabric.FabricUIManagerProviderImpl
+import com.facebook.react.runtime.JSCInstance
 import com.facebook.react.runtime.JSRuntimeFactory
 import com.facebook.react.runtime.hermes.HermesInstance
 import com.facebook.react.uimanager.ViewManagerRegistry
@@ -92,9 +93,6 @@ protected constructor(
    * If true, the app will load the Hermes engine, and fail if not found. If false, the app will
    * load the JSC engine, and fail if not found.
    */
-  @Deprecated(
-      "Setting isHermesEnabled inside `ReactNativeHost` is deprecated and this field will be ignored. If this field is set to true, you can safely remove it. If this field is set to false, please follow the setup on https://github.com/react-native-community/javascriptcore to continue using JSC",
-      ReplaceWith(""))
   protected open val isHermesEnabled: Boolean
     get() = true
 
@@ -108,7 +106,8 @@ protected constructor(
       context: Context,
       jsRuntimeFactory: JSRuntimeFactory? = null
   ): ReactHost {
-    val concreteJSRuntimeFactory = jsRuntimeFactory ?: HermesInstance()
+    val concreteJSRuntimeFactory =
+        jsRuntimeFactory ?: if (isHermesEnabled) HermesInstance() else JSCInstance()
     return DefaultReactHost.getDefaultReactHost(
         context,
         packages,

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/jscexecutor/JSCExecutor.kt

@@ -0,0 +1,41 @@
+/*
+ * 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.jscexecutor
+
+import com.facebook.jni.HybridData
+import com.facebook.proguard.annotations.DoNotStrip
+import com.facebook.react.bridge.JavaScriptExecutor
+import com.facebook.react.bridge.ReadableNativeMap
+import com.facebook.react.common.annotations.internal.LegacyArchitecture
+import com.facebook.react.common.annotations.internal.LegacyArchitectureLogger
+import com.facebook.soloader.SoLoader
+
+@DoNotStrip
+@LegacyArchitecture
+public class JSCExecutor internal constructor(jscConfig: ReadableNativeMap) :
+    JavaScriptExecutor(initHybrid(jscConfig)) {
+
+  override fun getName(): String {
+    return "JSCExecutor"
+  }
+
+  internal companion object {
+    init {
+      loadLibrary()
+      LegacyArchitectureLogger.assertLegacyArchitecture("JSCExecutor")
+    }
+
+    @JvmStatic
+    @Throws(UnsatisfiedLinkError::class)
+    fun loadLibrary() {
+      SoLoader.loadLibrary("jscexecutor")
+    }
+
+    @JvmStatic private external fun initHybrid(jscConfig: ReadableNativeMap): HybridData
+  }
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/jscexecutor/JSCExecutorFactory.kt

@@ -0,0 +1,46 @@
+/*
+ * 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.jscexecutor
+
+import com.facebook.react.bridge.JavaScriptExecutor
+import com.facebook.react.bridge.JavaScriptExecutorFactory
+import com.facebook.react.bridge.WritableNativeMap
+import com.facebook.react.common.annotations.internal.LegacyArchitecture
+import com.facebook.react.common.annotations.internal.LegacyArchitectureLogLevel
+import com.facebook.react.common.annotations.internal.LegacyArchitectureLogger
+
+@LegacyArchitecture(logLevel = LegacyArchitectureLogLevel.ERROR)
+public class JSCExecutorFactory(private val appName: String, private val deviceName: String) :
+    JavaScriptExecutorFactory {
+
+  init {
+    LegacyArchitectureLogger.assertLegacyArchitecture(
+        "JSCExecutorFactory", LegacyArchitectureLogLevel.ERROR)
+  }
+
+  @Throws(Exception::class)
+  override fun create(): JavaScriptExecutor {
+    val jscConfig =
+        WritableNativeMap().apply {
+          putString("OwnerIdentity", "ReactNative")
+          putString("AppIdentity", appName)
+          putString("DeviceIdentity", deviceName)
+        }
+    return JSCExecutor(jscConfig)
+  }
+
+  override fun startSamplingProfiler() {
+    throw UnsupportedOperationException("Starting sampling profiler not supported on ${toString()}")
+  }
+
+  override fun stopSamplingProfiler(filename: String) {
+    throw UnsupportedOperationException("Stopping sampling profiler not supported on ${toString()}")
+  }
+
+  override fun toString(): String = "JSIExecutor+JSCRuntime"
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/JSCInstance.kt

@@ -0,0 +1,24 @@
+/*
+ * 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.runtime
+
+import com.facebook.jni.HybridData
+import com.facebook.jni.annotations.DoNotStrip
+import com.facebook.jni.annotations.DoNotStripAny
+import com.facebook.soloader.SoLoader
+
+@DoNotStripAny
+public class JSCInstance : JSRuntimeFactory(initHybrid()) {
+  private companion object {
+    init {
+      SoLoader.loadLibrary("jscinstance")
+    }
+
+    @DoNotStrip @JvmStatic private external fun initHybrid(): HybridData
+  }
+}