UIManager::add/RemoveEventListener

packages/react-native/ReactCommon/react/renderer/scheduler/Scheduler.cpp

@@ -326,6 +326,16 @@ void Scheduler::uiManagerShouldSynchronouslyUpdateViewOnUIThread(
   }
 }
 
+void Scheduler::uiManagerShouldAddEventListener(
+    std::shared_ptr<const EventListener> listener) {
+  addEventListener(listener);
+}
+
+void Scheduler::uiManagerShouldRemoveEventListener(
+    const std::shared_ptr<const EventListener>& listener) {
+  removeEventListener(listener);
+}
+
 void Scheduler::reportMount(SurfaceId surfaceId) const {
   uiManager_->reportMount(surfaceId);
 }

packages/react-native/ReactCommon/react/renderer/scheduler/Scheduler.h

@@ -97,6 +97,10 @@ class Scheduler final : public UIManagerDelegate {
   void uiManagerShouldSynchronouslyUpdateViewOnUIThread(
       Tag tag,
       const folly::dynamic& props) override;
+  void uiManagerShouldAddEventListener(
+      std::shared_ptr<const EventListener> listener) final;
+  void uiManagerShouldRemoveEventListener(
+      const std::shared_ptr<const EventListener>& listener) final;
 
 #pragma mark - ContextContainer
   ContextContainer::Shared getContextContainer() const;

packages/react-native/ReactCommon/react/renderer/uimanager/UIManager.cpp

@@ -681,4 +681,20 @@ void UIManager::synchronouslyUpdateViewOnUIThread(
   }
 }
 
+#pragma mark - Add & Remove event listener
+
+void UIManager::addEventListener(
+    std::shared_ptr<const EventListener> listener) {
+  if (delegate_ != nullptr) {
+    delegate_->uiManagerShouldAddEventListener(listener);
+  }
+}
+
+void UIManager::removeEventListener(
+    const std::shared_ptr<const EventListener>& listener) {
+  if (delegate_ != nullptr) {
+    delegate_->uiManagerShouldRemoveEventListener(listener);
+  }
+}
+
 } // namespace facebook::react

packages/react-native/ReactCommon/react/renderer/uimanager/UIManager.h

@@ -205,6 +205,13 @@ class UIManager final : public ShadowTreeDelegate {
   void updateShadowTree(
       const std::unordered_map<Tag, folly::dynamic>& tagToProps);
 
+#pragma mark - Add & Remove event listener
+
+  void addEventListener(std::shared_ptr<const EventListener> listener);
+
+  void removeEventListener(
+      const std::shared_ptr<const EventListener>& listener);
+
  private:
   friend class UIManagerBinding;
   friend class Scheduler;

packages/react-native/ReactCommon/react/renderer/uimanager/UIManagerDelegate.h

@@ -65,6 +65,18 @@ class UIManagerDelegate {
       Tag tag,
       const folly::dynamic& props) = 0;
 
+  /*
+   * Add event listener.
+   */
+  virtual void uiManagerShouldAddEventListener(
+      std::shared_ptr<const EventListener> listener) = 0;
+
+  /*
+   * Remove event listener.
+   */
+  virtual void uiManagerShouldRemoveEventListener(
+      const std::shared_ptr<const EventListener>& listener) = 0;
+
   virtual ~UIManagerDelegate() noexcept = default;
 };