Expose UIManager.getConstants instead of getNativeViewConfig to JS in bridgeless mode

packages/react-native/ReactCommon/react/bridgeless/nativeviewconfig/NativeViewConfigProviderBinding.cpp → packages/react-native/ReactCommon/react/bridgeless/nativeviewconfig/LegacyUIManagerConstantsProviderBinding.cpp

@@ -5,26 +5,26 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-#include "NativeViewConfigProviderBinding.h"
+#include "LegacyUIManagerConstantsProviderBinding.h"
 
-namespace facebook::react::NativeViewConfigProviderBinding {
+namespace facebook::react::LegacyUIManagerConstantsProviderBinding {
 
 void install(jsi::Runtime &runtime, ProviderType &&provider) {
-  auto name = "RN$NativeComponentRegistry_getNativeViewConfig";
+  auto name = "RN$LegacyInterop_UIManager_getConstants";
   auto hostFunction = [provider = std::move(provider)](
                           jsi::Runtime &runtime,
                           jsi::Value const & /*thisValue*/,
-                          jsi::Value const *args,
+                          jsi::Value const * /*arguments*/,
                           size_t count) -> jsi::Value {
-    if (count != 1 || !args[0].isString()) {
-      throw new jsi::JSError(runtime, "1 argument of type String expected.");
+    if (count != 0) {
+      throw new jsi::JSError(runtime, "0 arguments expected.");
     }
-    return provider(args[0].getString(runtime).utf8(runtime));
+    return provider();
   };
 
   auto jsiFunction = jsi::Function::createFromHostFunction(
       runtime, jsi::PropNameID::forAscii(runtime, name), 2, hostFunction);
 
   runtime.global().setProperty(runtime, name, jsiFunction);
 }
-} // namespace facebook::react::NativeViewConfigProviderBinding
+} // namespace facebook::react::LegacyUIManagerConstantsProviderBinding

packages/react-native/ReactCommon/react/bridgeless/nativeviewconfig/LegacyUIManagerConstantsProviderBinding.h

@@ -0,0 +1,22 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <jsi/jsi.h>
+
+namespace facebook::react::LegacyUIManagerConstantsProviderBinding {
+
+using ProviderType = std::function<jsi::Value()>;
+
+/*
+ * Installs RN$LegacyInterop_UIManager_getConstants binding into JavaScript
+ * runtime. It is supposed to be used as a substitute to UIManager.getConstants
+ * in bridgeless mode.
+ */
+void install(jsi::Runtime &runtime, ProviderType &&provider);
+} // namespace facebook::react::LegacyUIManagerConstantsProviderBinding

packages/react-native/ReactCommon/react/bridgeless/platform/ios/Core/RCTInstance.mm

@@ -28,7 +28,7 @@
 #import <React/RCTModuleData.h>
 #import <React/RCTPerformanceLogger.h>
 #import <React/RCTSurfacePresenter.h>
-#import <ReactCommon/RCTNativeViewConfigProvider.h>
+#import <ReactCommon/RCTLegacyUIManagerConstantsProvider.h>
 #import <ReactCommon/RCTTurboModuleManager.h>
 #import <ReactCommon/RuntimeExecutor.h>
 #import <cxxreact/ReactMarker.h>
@@ -296,7 +296,7 @@ - (void)_start
     RCTInstallNativeComponentRegistryBinding(runtime);
 
     if (RCTGetUseNativeViewConfigsInBridgelessMode()) {
-      installNativeViewConfigProviderBinding(runtime);
+      installLegacyUIManagerConstantsProviderBinding(runtime);
     }
 
     [strongSelf->_delegate instance:strongSelf didInitializeRuntime:runtime];

packages/react-native/ReactCommon/react/bridgeless/platform/ios/NativeViewConfig/RCTLegacyUIManagerConstantsProvider.h

@@ -0,0 +1,19 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <jsi/jsi.h>
+
+namespace facebook::react {
+/*
+ * Installs UIManger constants provider into JavaScript runtime. This is needed
+ * to implement UIManager.getConstants in bridgeless mode. The constants object
+ * contains view configs for every legacy native component.
+ */
+void installLegacyUIManagerConstantsProviderBinding(jsi::Runtime &runtime);
+} // namespace facebook::react

packages/react-native/ReactCommon/react/bridgeless/platform/ios/NativeViewConfig/RCTLegacyUIManagerConstantsProvider.mm

@@ -0,0 +1,44 @@
+/*
+ * 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.
+ */
+
+#include "RCTLegacyUIManagerConstantsProvider.h"
+
+#import <React/RCTBridge+Private.h>
+#import <React/RCTComponentData.h>
+#import <React/RCTUIManager.h>
+#import <React/RCTViewManager.h>
+#import <ReactCommon/RCTTurboModule.h>
+#import <react/bridgeless/nativeviewconfig/LegacyUIManagerConstantsProviderBinding.h>
+
+namespace facebook::react {
+namespace {
+
+jsi::Value getConstants(facebook::jsi::Runtime &runtime)
+{
+  static NSMutableDictionary<NSString *, NSObject *> *result = [NSMutableDictionary new];
+  auto directEvents = [NSMutableDictionary new];
+  auto bubblingEvents = [NSMutableDictionary new];
+  for (Class moduleClass in RCTGetModuleClasses()) {
+    if ([moduleClass isSubclassOfClass:RCTViewManager.class]) {
+      auto name = RCTViewManagerModuleNameForClass(moduleClass);
+      auto viewConfig = [RCTComponentData viewConfigForViewMangerClass:moduleClass];
+      auto moduleConstants =
+          RCTModuleConstantsForDestructuredComponent(directEvents, bubblingEvents, moduleClass, name, viewConfig);
+      result[name] = moduleConstants;
+    }
+  }
+  return TurboModuleConvertUtils::convertObjCObjectToJSIValue(runtime, result);
+};
+
+} // namespace
+
+void installLegacyUIManagerConstantsProviderBinding(jsi::Runtime &runtime)
+{
+  auto constantsProvider = [&runtime]() -> jsi::Value { return getConstants(runtime); };
+  LegacyUIManagerConstantsProviderBinding::install(runtime, std::move(constantsProvider));
+}
+} // namespace facebook::react