mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Ruslan Shestopalyuk
09ad0cc0c6
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/35768 Changelog: [Internal] This implements native side mechanics for reporting user events timing to JS (PerformanceObserver API). See the standard for more details: https://www.w3.org/TR/event-timing/ The events are only logged when there are any active subscriptions (via `PerformanceObserver.observe`), also we only log "discrete events" (i.e. no likes of mouse move), so the overhead is non-existing. There are two main metrics of interest for an event lifecycle: * Time the event is spent in the queue, i.e. the time between it's created and dispatched * Time that is spend in the event handler on the JS side (event dispatch), or processing time Both of these are measured, and the corresponding fields are populated. Reviewed By: sammy-SC Differential Revision: D42294947 fbshipit-source-id: 4fd7938c04b942400befa4057d4929fb2763cee1
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include "EventDispatcher.h"
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#include <cxxreact/JSExecutor.h>
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#include <react/renderer/core/StateUpdate.h>
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#include "EventLogger.h"
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#include "BatchedEventQueue.h"
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#include "RawEvent.h"
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#include "UnbatchedEventQueue.h"
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namespace facebook::react {
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EventDispatcher::EventDispatcher(
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EventQueueProcessor const &eventProcessor,
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EventBeat::Factory const &synchonousEventBeatFactory,
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EventBeat::Factory const &asynchonousEventBeatFactory,
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EventBeat::SharedOwnerBox const &ownerBox)
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: synchronousUnbatchedQueue_(std::make_unique<UnbatchedEventQueue>(
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eventProcessor,
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synchonousEventBeatFactory(ownerBox))),
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synchronousBatchedQueue_(std::make_unique<BatchedEventQueue>(
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eventProcessor,
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synchonousEventBeatFactory(ownerBox))),
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asynchronousUnbatchedQueue_(std::make_unique<UnbatchedEventQueue>(
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eventProcessor,
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asynchonousEventBeatFactory(ownerBox))),
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asynchronousBatchedQueue_(std::make_unique<BatchedEventQueue>(
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eventProcessor,
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asynchonousEventBeatFactory(ownerBox))) {}
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void EventDispatcher::dispatchEvent(RawEvent &&rawEvent, EventPriority priority)
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const {
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// Allows the event listener to interrupt default event dispatch
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if (eventListeners_.willDispatchEvent(rawEvent)) {
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return;
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}
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auto eventLogger = getEventLogger();
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if (eventLogger != nullptr) {
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rawEvent.loggingTag = eventLogger->onEventStart(rawEvent.type.c_str());
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}
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getEventQueue(priority).enqueueEvent(std::move(rawEvent));
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}
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void EventDispatcher::dispatchStateUpdate(
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StateUpdate &&stateUpdate,
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EventPriority priority) const {
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getEventQueue(priority).enqueueStateUpdate(std::move(stateUpdate));
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}
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void EventDispatcher::dispatchUniqueEvent(RawEvent &&rawEvent) const {
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// Allows the event listener to interrupt default event dispatch
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if (eventListeners_.willDispatchEvent(rawEvent)) {
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return;
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}
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asynchronousBatchedQueue_->enqueueUniqueEvent(std::move(rawEvent));
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}
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const EventQueue &EventDispatcher::getEventQueue(EventPriority priority) const {
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switch (priority) {
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case EventPriority::SynchronousUnbatched:
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return *synchronousUnbatchedQueue_;
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case EventPriority::SynchronousBatched:
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return *synchronousBatchedQueue_;
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case EventPriority::AsynchronousUnbatched:
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return *asynchronousUnbatchedQueue_;
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case EventPriority::AsynchronousBatched:
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return *asynchronousBatchedQueue_;
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}
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}
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void EventDispatcher::addListener(
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const std::shared_ptr<EventListener const> &listener) const {
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eventListeners_.addListener(listener);
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}
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/*
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* Removes provided event listener to the event dispatcher.
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*/
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void EventDispatcher::removeListener(
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const std::shared_ptr<EventListener const> &listener) const {
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eventListeners_.removeListener(listener);
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}
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} // namespace facebook::react
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