Add CSSProp and CSSPropDefinition

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

@@ -79,6 +79,9 @@ val preparePrefab by
       // migrate one library at a time.
       input.set(
           listOf(
+              PrefabPreprocessingEntry(
+                  "react_render_css",
+                  Pair("../ReactCommon/react/renderer/css/", "react/renderer/css/")),
               PrefabPreprocessingEntry(
                   "react_render_debug",
                   Pair("../ReactCommon/react/renderer/debug/", "react/renderer/debug/")),
@@ -632,6 +635,7 @@ android {
     create("react_render_debug") {
       headers = File(prefabHeadersDir, "react_render_debug").absolutePath
     }
+    create("react_render_css") { headers = File(prefabHeadersDir, "react_render_css").absolutePath }
     create("turbomodulejsijni") {
       headers = File(prefabHeadersDir, "turbomodulejsijni").absolutePath
     }

packages/react-native/ReactAndroid/cmake-utils/ReactNative-application.cmake

@@ -62,6 +62,7 @@ target_compile_options(${CMAKE_PROJECT_NAME}
 
 # Prefab packages from React Native
 find_package(ReactAndroid REQUIRED CONFIG)
+add_library(react_render_css ALIAS ReactAndroid::react_render_css)
 add_library(react_render_debug ALIAS ReactAndroid::react_render_debug)
 add_library(turbomodulejsijni ALIAS ReactAndroid::turbomodulejsijni)
 add_library(runtimeexecutor ALIAS ReactAndroid::runtimeexecutor)
@@ -102,6 +103,7 @@ target_link_libraries(${CMAKE_PROJECT_NAME}
         react_cxxreactpackage               # prefab ready
         react_render_componentregistry      # prefab ready
         react_render_core                   # prefab ready
+        react_render_css                    # prefab ready
         react_render_debug                  # prefab ready
         react_render_graphics               # prefab ready
         react_render_imagemanager           # prefab ready

packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt

@@ -79,6 +79,7 @@ add_react_common_subdir(react/renderer/scheduler)
 add_react_common_subdir(react/renderer/telemetry)
 add_react_common_subdir(react/renderer/uimanager)
 add_react_common_subdir(react/renderer/core)
+add_react_common_subdir(react/renderer/css)
 add_react_common_subdir(react/renderer/element)
 add_react_common_subdir(react/renderer/graphics)
 add_react_common_subdir(react/renderer/debug)

packages/react-native/ReactAndroid/src/main/jni/react/fabric/CMakeLists.txt

@@ -31,6 +31,7 @@ target_link_libraries(
         react_render_attributedstring
         react_render_componentregistry
         react_render_core
+        react_render_css
         react_render_debug
         react_render_graphics
         react_render_imagemanager

packages/react-native/ReactCommon/React-Fabric.podspec

@@ -225,6 +225,11 @@ Pod::Spec.new do |s|
     end
   end
 
+  s.subspec "css" do |ss|
+    ss.source_files         = "react/renderer/css/*.{cpp,h}"
+    ss.header_dir           = "react/renderer/css"
+  end
+
   s.subspec "imagemanager" do |ss|
     ss.dependency             folly_dep_name, folly_version
     ss.compiler_flags       = folly_compiler_flags

packages/react-native/ReactCommon/react/renderer/css/CMakeLists.txt

@@ -0,0 +1,20 @@
+# 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.
+
+cmake_minimum_required(VERSION 3.13)
+set(CMAKE_VERBOSE_MAKEFILE on)
+
+add_compile_options(
+        -fexceptions
+        -frtti
+        -std=c++20
+        -Wall
+        -Wpedantic)
+
+file(GLOB react_render_css_SRC CONFIGURE_DEPENDS *.cpp)
+add_library(react_render_css STATIC ${react_render_css_SRC})
+
+target_include_directories(react_render_css PUBLIC ${REACT_COMMON_DIR})
+target_link_libraries(react_render_css glog glog_init react_debug)