72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
|
/*
|
||
|
|
* Copyright (c) Meta Platforms, Inc. and affiliates.
|
||
|
|
*
|
||
|
|
* This source code is licensed under the MIT license found in the
|
||
|
|
* LICENSE file in the root directory of this source tree.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <functional>
|
||
|
|
#include <initializer_list>
|
||
|
|
#include <memory>
|
||
|
|
|
||
|
|
#include <react/renderer/components/view/primitives.h>
|
||
|
|
#include <react/renderer/core/ReactPrimitives.h>
|
||
|
|
#include <react/renderer/core/ShadowNode.h>
|
||
|
|
#include <react/renderer/uimanager/UIManager.h>
|
||
|
|
|
||
|
|
namespace facebook::react {
|
||
|
|
|
||
|
|
class PointerHoverTracker {
|
||
|
|
public:
|
||
|
|
using Unique = std::unique_ptr<PointerHoverTracker>;
|
||
|
|
using EventPath = std::vector<std::reference_wrapper<const ShadowNode>>;
|
||
|
|
|
||
|
|
PointerHoverTracker(ShadowNode::Shared target, const UIManager& uiManager);
|
||
|
|
|
||
|
|
const ShadowNode* getTarget(const UIManager& uiManager) const;
|
||
|
|
bool hasSameTarget(const PointerHoverTracker& other) const;
|
||
|
|
bool areAnyTargetsListeningToEvents(
|
||
|
|
std::initializer_list<ViewEvents::Offset> eventTypes,
|
||
|
|
const UIManager& uiManager) const;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Performs a diff between the current and given trackers and returns a tuple
|
||
|
|
* containing [1]: the nodes that have been removed and [2]: the nodes that
|
||
|
|
* have been added. Note that the order of these lists are from parents ->
|
||
|
|
* children.
|
||
|
|
*/
|
||
|
|
std::tuple<EventPath, EventPath> diffEventPath(
|
||
|
|
const PointerHoverTracker& other,
|
||
|
|
const UIManager& uiManager) const;
|
||
|
|
|
||
|
|
void markAsOld();
|
||
|
|
|
||
|
|
private:
|
||
|
|
/**
|
||
|
|
* Flag that lets the tracker know if it needs to fetch the latest version of
|
||
|
|
* the shadow node or not.
|
||
|
|
*/
|
||
|
|
bool isOldTracker_ = false;
|
||
|
|
|
||
|
|
ShadowNode::Shared root_;
|
||
|
|
ShadowNode::Shared target_;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A thin wrapper around `UIManager::getNewestCloneOfShadowNode` that only
|
||
|
|
* actually gets the newest clone only if the tracker is marked as "old".
|
||
|
|
*/
|
||
|
|
const ShadowNode* getLatestNode(
|
||
|
|
const ShadowNode& node,
|
||
|
|
const UIManager& uiManager) const;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves the list of shadow node references in the event's path starting
|
||
|
|
* from the target node to the root node.
|
||
|
|
*/
|
||
|
|
EventPath getEventPathTargets() const;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace facebook::react
|