mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
306a8adade
Summary: The callback `dispatchEvent` is called asynchronously on the JavaScript thread, so all data it uses must be copied to the lambda. To work around this constraint we use a shared pointer for the counter. Changelog: [Internal] Fabric-specific internal change. Reviewed By: sammy-SC Differential Revision: D24598840 fbshipit-source-id: fb5581858d54dc806863caf0c7c4f612ed6046e2
50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its 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 <mutex>
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#include <react/renderer/core/LayoutMetrics.h>
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#include <react/renderer/core/ReactPrimitives.h>
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#include "TouchEventEmitter.h"
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namespace facebook {
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namespace react {
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class ViewEventEmitter;
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using SharedViewEventEmitter = std::shared_ptr<const ViewEventEmitter>;
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class ViewEventEmitter : public TouchEventEmitter {
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public:
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using TouchEventEmitter::TouchEventEmitter;
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#pragma mark - Accessibility
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void onAccessibilityAction(const std::string &name) const;
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void onAccessibilityTap() const;
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void onAccessibilityMagicTap() const;
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void onAccessibilityEscape() const;
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#pragma mark - Layout
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void onLayout(const LayoutMetrics &layoutMetrics) const;
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private:
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mutable std::mutex layoutMetricsMutex_;
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mutable LayoutMetrics lastLayoutMetrics_;
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mutable std::shared_ptr<std::atomic_uint_fast8_t> eventCounter_{
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std::make_shared<std::atomic_uint_fast8_t>(0)};
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};
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} // namespace react
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} // namespace facebook
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