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
77 lines
1.8 KiB
C++
77 lines
1.8 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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#pragma once
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#include <memory>
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#include <string>
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#include <react/renderer/core/EventLogger.h>
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#include <react/renderer/core/EventTarget.h>
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#include <react/renderer/core/ValueFactory.h>
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namespace facebook {
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namespace react {
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/*
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* Represents ready-to-dispatch event object.
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*/
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struct RawEvent {
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/*
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* Defines category of a native platform event. This is used to deduce types
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* of events for Concurrent Mode.
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* This enum is duplicated for JNI access in `EventCategoryDef.java`, keep in
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* sync.
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*/
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enum class Category {
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/*
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* Start of a continuous event. To be used with touchStart.
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*/
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ContinuousStart = 0,
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/*
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* End of a continuous event. To be used with touchEnd.
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*/
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ContinuousEnd = 1,
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/*
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* Priority for this event will be determined from other events in the
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* queue. If it is triggered by continuous event, its priority will be
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* default. If it is not triggered by continuous event, its priority will be
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* discrete.
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*/
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Unspecified = 2,
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/*
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* Forces discrete type for the event. Regardless if continuous event is
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* ongoing.
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*/
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Discrete = 3,
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/*
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* Forces continuous type for the event. Regardless if continuous event
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* isn't ongoing.
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*/
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Continuous = 4
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};
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RawEvent(
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std::string type,
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ValueFactory payloadFactory,
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SharedEventTarget eventTarget,
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Category category = Category::Unspecified);
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std::string type;
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ValueFactory payloadFactory;
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SharedEventTarget eventTarget;
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Category category;
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EventTag loggingTag{0};
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};
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} // namespace react
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} // namespace facebook
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