76 lines
2.3 KiB
C++
76 lines
2.3 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 <react/renderer/components/root/RootShadowNode.h>
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#include <react/renderer/core/ShadowNode.h>
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#include <react/renderer/core/ShadowNodeFamily.h>
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namespace facebook::react {
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using MutationObserverId = int32_t;
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struct MutationRecord {
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MutationObserverId mutationObserverId;
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std::shared_ptr<const ShadowNode> targetShadowNode;
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std::vector<std::shared_ptr<const ShadowNode>> addedShadowNodes;
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std::vector<std::shared_ptr<const ShadowNode>> removedShadowNodes;
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};
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class MutationObserver {
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public:
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explicit MutationObserver(MutationObserverId mutationObserverId);
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// delete copy constructor
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MutationObserver(const MutationObserver&) = delete;
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// delete copy assignment
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MutationObserver& operator=(const MutationObserver&) = delete;
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// allow move constructor
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MutationObserver(MutationObserver&&) = default;
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// allow move assignment
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MutationObserver& operator=(MutationObserver&&) = default;
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void observe(
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std::shared_ptr<const ShadowNodeFamily> targetShadowNodeFamily,
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bool observeSubtree);
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void recordMutations(
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const RootShadowNode& oldRootShadowNode,
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const RootShadowNode& newRootShadowNode,
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std::vector<MutationRecord>& recordedMutations) const;
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private:
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MutationObserverId mutationObserverId_;
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std::vector<std::shared_ptr<const ShadowNodeFamily>>
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deeplyObservedShadowNodeFamilies_;
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std::vector<std::shared_ptr<const ShadowNodeFamily>>
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shallowlyObservedShadowNodeFamilies_;
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using SetOfShadowNodePointers = std::unordered_set<const ShadowNode*>;
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void recordMutationsInTarget(
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const ShadowNodeFamily& targetShadowNodeFamily,
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const RootShadowNode& oldRootShadowNode,
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const RootShadowNode& newRootShadowNode,
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bool observeSubtree,
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std::vector<MutationRecord>& recordedMutations,
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SetOfShadowNodePointers& processedNodes) const;
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void recordMutationsInSubtrees(
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const std::shared_ptr<const ShadowNode>& oldNode,
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const std::shared_ptr<const ShadowNode>& newNode,
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bool observeSubtree,
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std::vector<MutationRecord>& recordedMutations,
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SetOfShadowNodePointers& processedNodes) const;
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};
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} // namespace facebook::react
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