112 lines
3.6 KiB
C++
112 lines
3.6 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 <functional>
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#include <jsi/jsi.h>
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#include <react/renderer/uimanager/PointerHoverTracker.h>
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#include <react/renderer/uimanager/UIManager.h>
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namespace facebook::react {
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// Helper struct to package a PointerEvent and SharedEventTarget together
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struct PointerEventTarget {
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PointerEvent event;
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std::shared_ptr<const ShadowNode> target;
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};
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// Helper struct to contain an active pointer's event data along with additional
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// metadata
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struct ActivePointer {
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PointerEvent event;
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/*
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* Informs the event system that when the touch is released it should be
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* treated as the pointer leaving the screen entirely.
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*/
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bool shouldLeaveWhenReleased{};
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};
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using DispatchEvent = std::function<void(
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const ShadowNode& targetNode,
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const std::string& type,
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ReactEventPriority priority,
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const EventPayload& payload)>;
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using PointerIdentifier = int32_t;
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using CaptureTargetOverrideRegistry =
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std::unordered_map<PointerIdentifier, std::weak_ptr<const ShadowNode>>;
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using ActivePointerRegistry =
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std::unordered_map<PointerIdentifier, ActivePointer>;
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using PointerHoverTrackerRegistry =
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std::unordered_map<PointerIdentifier, PointerHoverTracker::Unique>;
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class PointerEventsProcessor final {
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public:
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static std::shared_ptr<const ShadowNode> getShadowNodeFromEventTarget(
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jsi::Runtime& runtime,
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const EventTarget* target);
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void interceptPointerEvent(
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const std::shared_ptr<const ShadowNode>& target,
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const std::string& type,
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ReactEventPriority priority,
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const PointerEvent& event,
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const DispatchEvent& eventDispatcher,
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const UIManager& uiManager);
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void setPointerCapture(
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PointerIdentifier pointerId,
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const std::shared_ptr<const ShadowNode>& shadowNode);
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void releasePointerCapture(
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PointerIdentifier pointerId,
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const ShadowNode* shadowNode);
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bool hasPointerCapture(
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PointerIdentifier pointerId,
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const ShadowNode* shadowNode);
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private:
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ActivePointer* getActivePointer(PointerIdentifier pointerId);
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void registerActivePointer(const PointerEvent& event);
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void updateActivePointer(const PointerEvent& event);
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void unregisterActivePointer(const PointerEvent& event);
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void processPendingPointerCapture(
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const PointerEvent& event,
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const DispatchEvent& eventDispatcher,
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const UIManager& uiManager);
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ActivePointerRegistry activePointers_;
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CaptureTargetOverrideRegistry pendingPointerCaptureTargetOverrides_;
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CaptureTargetOverrideRegistry activePointerCaptureTargetOverrides_;
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/*
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* Private method which is used for tracking the location of pointer events to
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* manage the entering/leaving events. The primary idea is that a pointer's
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* presence & movement is dicated by a variety of underlying events such as
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* down, move, and up — and they should all be treated the same when it comes
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* to tracking the entering & leaving of pointers to views. This method
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* accomplishes that by receiving the pointer event, and the target view (can
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* be null in cases when the event indicates that the pointer has left the
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* screen entirely)
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*/
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void handleIncomingPointerEventOnNode(
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const PointerEvent& event,
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const std::shared_ptr<const ShadowNode>& targetNode,
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const DispatchEvent& eventDispatcher,
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const UIManager& uiManager);
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PointerHoverTrackerRegistry previousHoverTrackersPerPointer_;
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};
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} // namespace facebook::react
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