Move rncxx scheduler to oss (#50535)

Summary:
Pull Request resolved: #50535

## Changelog:

[General] [Added] - Move rncxx scheduler to oss

Reviewed By: rshest

Differential Revision: D72588228

fbshipit-source-id: 428c60e20351b9fed49fcbdbd617b5b5940b8a2c

Author: zeyap

packages/react-native/ReactCxxPlatform/react/renderer/scheduler/SchedulerDelegateImpl.cpp

@@ -0,0 +1,56 @@
+// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+
+#include "SchedulerDelegateImpl.h"
+
+namespace facebook::react {
+
+SchedulerDelegateImpl::SchedulerDelegateImpl(
+    std::shared_ptr<IMountingManager> mountingManager) noexcept
+    : mountingManager_(std::move(mountingManager)) {}
+
+void SchedulerDelegateImpl::schedulerDidFinishTransaction(
+    const std::shared_ptr<const MountingCoordinator>& /*mountingCoordinator*/) {
+  // no-op, we will flush the transaction from schedulerShouldRenderTransactions
+}
+
+void SchedulerDelegateImpl::schedulerShouldRenderTransactions(
+    const std::shared_ptr<const MountingCoordinator>& mountingCoordinator) {
+  auto surfaceId = mountingCoordinator->getSurfaceId();
+  if (auto transaction = mountingCoordinator->pullTransaction();
+      transaction.has_value()) {
+    if (auto& transactionValue = transaction.value();
+        !transactionValue.getMutations().empty()) {
+      mountingManager_->executeMount(surfaceId, std::move(transactionValue));
+    }
+  }
+}
+
+void SchedulerDelegateImpl::schedulerDidRequestPreliminaryViewAllocation(
+    const ShadowNode& shadowNode) {}
+
+void SchedulerDelegateImpl::schedulerDidDispatchCommand(
+    const ShadowView& shadowView,
+    const std::string& commandName,
+    const folly::dynamic& args) {
+  mountingManager_->dispatchCommand(shadowView, commandName, args);
+}
+
+void SchedulerDelegateImpl::schedulerDidSetIsJSResponder(
+    const ShadowView& shadowView,
+    bool isJSResponder,
+    bool blockNativeResponder) {
+  mountingManager_->setIsJSResponder(
+      shadowView, isJSResponder, blockNativeResponder);
+}
+
+void SchedulerDelegateImpl::schedulerDidSendAccessibilityEvent(
+    const ShadowView& shadowView,
+    const std::string& eventType) {}
+
+void SchedulerDelegateImpl::schedulerShouldSynchronouslyUpdateViewOnUIThread(
+    Tag tag,
+    const folly::dynamic& props) {
+  mountingManager_->synchronouslyUpdateViewOnUIThread(tag, props);
+}
+
+} // namespace facebook::react

packages/react-native/ReactCxxPlatform/react/renderer/scheduler/SchedulerDelegateImpl.h

@@ -0,0 +1,57 @@
+// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+
+#pragma once
+
+#include <react/renderer/scheduler/SchedulerDelegate.h>
+#include <react/renderer/uimanager/IMountingManager.h>
+
+namespace facebook::react {
+
+class IMountingManager;
+
+class SchedulerDelegateImpl : public SchedulerDelegate {
+ public:
+  SchedulerDelegateImpl(
+      std::shared_ptr<IMountingManager> mountingManager) noexcept;
+
+  ~SchedulerDelegateImpl() noexcept override = default;
+
+  SchedulerDelegateImpl(SchedulerDelegateImpl&&) noexcept = default;
+  SchedulerDelegateImpl& operator=(SchedulerDelegateImpl&&) noexcept = default;
+  SchedulerDelegateImpl(const SchedulerDelegateImpl&) = delete;
+  SchedulerDelegateImpl& operator=(const SchedulerDelegateImpl&) = delete;
+
+ private:
+  void schedulerDidFinishTransaction(
+      const std::shared_ptr<const MountingCoordinator>& mountingCoordinator)
+      override;
+
+  void schedulerShouldRenderTransactions(
+      const std::shared_ptr<const MountingCoordinator>& mountingCoordinator)
+      override;
+
+  void schedulerDidRequestPreliminaryViewAllocation(
+      const ShadowNode& shadowNode) override;
+
+  void schedulerDidDispatchCommand(
+      const ShadowView& shadowView,
+      const std::string& commandName,
+      const folly::dynamic& args) override;
+
+  void schedulerDidSetIsJSResponder(
+      const ShadowView& shadowView,
+      bool isJSResponder,
+      bool blockNativeResponder) override;
+
+  void schedulerDidSendAccessibilityEvent(
+      const ShadowView& shadowView,
+      const std::string& eventType) override;
+
+  void schedulerShouldSynchronouslyUpdateViewOnUIThread(
+      Tag tag,
+      const folly::dynamic& props) override;
+
+  std::shared_ptr<IMountingManager> mountingManager_;
+};
+
+}; // namespace facebook::react

packages/react-native/ReactCxxPlatform/react/renderer/scheduler/SurfaceDelegate.h

@@ -0,0 +1,41 @@
+// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+
+#pragma once
+
+#include <string>
+
+namespace facebook::react {
+/**
+ * Interface for handling a surface in React Native. Each platform can have
+ * custom logic to show/hide.
+ * Inspired by
+ * xplat/js/react-native-github/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/common/SurfaceDelegate.java
+ */
+class SurfaceDelegate {
+ public:
+  virtual ~SurfaceDelegate() = default;
+
+  /**
+   * Create the React content view that uses the appKey as the React application
+   * name
+   */
+  virtual void createContentView(std::string appKey) = 0;
+
+  /**
+   * Check if the content view is created and ready to be shown
+   */
+  virtual bool isContentViewReady() = 0;
+
+  /** Destroy the React content view to avoid memory leak */
+  virtual void destroyContentView() = 0;
+
+  /** Show the surface containing the React content view */
+  virtual void show() = 0;
+
+  /** Hide the surface containing the React content view */
+  virtual void hide() = 0;
+
+  /** Check if the surface is currently showing */
+  virtual bool isShowing() = 0;
+};
+} // namespace facebook::react