jiuyiUniapp/service/node_modules/react-native/ReactCommon/react/renderer/attributedstring/AttributedStringBox.h

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2025-02-13 09:59:20 +08:00
/*
* 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 <memory>
#include <react/renderer/attributedstring/AttributedString.h>
namespace facebook::react {
/*
* Represents an object storing a shared `AttributedString` or a shared pointer
* to some opaque platform-specific object that can be used as an attributed
* string. The class serves two main purposes:
* - Represent type-erased attributed string entity (which can be
* platform-specific or platform-independent);
* - Represent a container that can be copied with constant complexity.
*/
class AttributedStringBox final {
public:
enum class Mode { Value, OpaquePointer };
/*
* Default constructor constructs an empty string.
*/
AttributedStringBox();
/*
* Custom explicit constructors.
*/
explicit AttributedStringBox(const AttributedString& value);
explicit AttributedStringBox(std::shared_ptr<void> opaquePointer);
/*
* Movable, Copyable, Assignable.
*/
AttributedStringBox(const AttributedStringBox& other) = default;
AttributedStringBox(AttributedStringBox&& other) noexcept;
AttributedStringBox& operator=(const AttributedStringBox& other) = default;
AttributedStringBox& operator=(AttributedStringBox&& other) noexcept;
/*
* Getters.
*/
Mode getMode() const;
const AttributedString& getValue() const;
std::shared_ptr<void> getOpaquePointer() const;
private:
Mode mode_;
std::shared_ptr<const AttributedString> value_;
std::shared_ptr<void> opaquePointer_;
};
bool operator==(const AttributedStringBox& lhs, const AttributedStringBox& rhs);
bool operator!=(const AttributedStringBox& lhs, const AttributedStringBox& rhs);
} // namespace facebook::react
template <>
struct std::hash<facebook::react::AttributedStringBox> {
size_t operator()(
const facebook::react::AttributedStringBox& attributedStringBox) const {
switch (attributedStringBox.getMode()) {
case facebook::react::AttributedStringBox::Mode::Value:
return std::hash<facebook::react::AttributedString>()(
attributedStringBox.getValue());
case facebook::react::AttributedStringBox::Mode::OpaquePointer:
return std::hash<std::shared_ptr<void>>()(
attributedStringBox.getOpaquePointer());
}
}
};