Pass EventDispatcher listeners by value (facebook#45077)

Summary:
Pull Request resolved: facebook#45077

Changelog: [Internal]

Reviewed By: sammy-SC

Differential Revision: D58791938

fbshipit-source-id: 079fbfad4dd309a41c360e1bdb93e56f8793e6b3

Author: javache

packages/react-native/ReactCommon/react/renderer/core/EventDispatcher.cpp

@@ -59,12 +59,13 @@ void EventDispatcher::dispatchUniqueEvent(RawEvent&& rawEvent) const {
   if (eventListeners_.willDispatchEvent(rawEvent)) {
     return;
   }
+
   eventQueue_.enqueueUniqueEvent(std::move(rawEvent));
 }
 
 void EventDispatcher::addListener(
-    const std::shared_ptr<const EventListener>& listener) const {
-  eventListeners_.addListener(listener);
+    std::shared_ptr<const EventListener> listener) const {
+  eventListeners_.addListener(std::move(listener));
 }
 
 /*

packages/react-native/ReactCommon/react/renderer/core/EventDispatcher.h

@@ -64,7 +64,7 @@ class EventDispatcher {
   /*
    * Adds provided event listener to the event dispatcher.
    */
-  void addListener(const std::shared_ptr<const EventListener>& listener) const;
+  void addListener(std::shared_ptr<const EventListener> listener) const;
 
   /*
    * Removes provided event listener to the event dispatcher.

packages/react-native/ReactCommon/react/renderer/core/EventListener.cpp

@@ -16,16 +16,19 @@ bool EventListenerContainer::willDispatchEvent(const RawEvent& event) {
 
   bool handled = false;
   for (const auto& listener : eventListeners_) {
-    handled = handled || listener->operator()(event);
+    handled = (*listener)(event);
+    if (handled) {
+      break;
+    }
   }
   return handled;
 }
 
 void EventListenerContainer::addListener(
-    const std::shared_ptr<const EventListener>& listener) {
+    std::shared_ptr<const EventListener> listener) {
   std::unique_lock lock(mutex_);
 
-  eventListeners_.push_back(listener);
+  eventListeners_.push_back(std::move(listener));
 }
 
 void EventListenerContainer::removeListener(

packages/react-native/ReactCommon/react/renderer/core/EventListener.h

@@ -30,7 +30,7 @@ class EventListenerContainer {
    */
   bool willDispatchEvent(const RawEvent& event);
 
-  void addListener(const std::shared_ptr<const EventListener>& listener);
+  void addListener(std::shared_ptr<const EventListener> listener);
   void removeListener(const std::shared_ptr<const EventListener>& listener);
 
  private:

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

@@ -364,9 +364,9 @@ std::shared_ptr<UIManager> Scheduler::getUIManager() const {
 }
 
 void Scheduler::addEventListener(
-    const std::shared_ptr<const EventListener>& listener) {
+    std::shared_ptr<const EventListener> listener) {
   if (eventDispatcher_->has_value()) {
-    eventDispatcher_->value().addListener(listener);
+    eventDispatcher_->value().addListener(std::move(listener));
   }
 }
 

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

@@ -109,7 +109,7 @@ class Scheduler final : public UIManagerDelegate {
   void reportMount(SurfaceId surfaceId) const;
 
 #pragma mark - Event listeners
-  void addEventListener(const std::shared_ptr<const EventListener>& listener);
+  void addEventListener(std::shared_ptr<const EventListener> listener);
   void removeEventListener(
       const std::shared_ptr<const EventListener>& listener);