jiuyiUniapp/service/node_modules/react-native/ReactCommon/react/renderer/mounting/ShadowViewMutation.h

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/*
* 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 <vector>
#include <react/renderer/mounting/ShadowView.h>
namespace facebook::react {
/*
* Describes a single native view tree mutation which may contain
* pointers to an old shadow view, a new shadow view, a parent shadow view and
* final index of inserted or updated view.
* Use static methods to instantiate mutations of different types.
*/
struct ShadowViewMutation final {
using List = std::vector<ShadowViewMutation>;
ShadowViewMutation() = delete;
#pragma mark - Designated Initializers
/*
* Creates and returns an `Create` mutation.
*/
static ShadowViewMutation CreateMutation(ShadowView shadowView);
/*
* Creates and returns an `Delete` mutation.
*/
static ShadowViewMutation DeleteMutation(ShadowView shadowView);
/*
* Creates and returns an `Insert` mutation.
*/
static ShadowViewMutation InsertMutation(
ShadowView parentShadowView,
ShadowView childShadowView,
int index);
/*
* Creates and returns a `Remove` mutation.
*/
static ShadowViewMutation RemoveMutation(
ShadowView parentShadowView,
ShadowView childShadowView,
int index);
/*
* Creates and returns an `Update` mutation.
*/
static ShadowViewMutation UpdateMutation(
ShadowView oldChildShadowView,
ShadowView newChildShadowView,
ShadowView parentShadowView);
#pragma mark - Type
enum Type {
Create = 1,
Delete = 2,
Insert = 4,
Remove = 8,
Update = 16,
};
#pragma mark - Fields
Type type = {Create};
ShadowView parentShadowView = {};
ShadowView oldChildShadowView = {};
ShadowView newChildShadowView = {};
int index = -1;
// Some platforms can have the notion of virtual views - views that are in the
// ShadowTree hierarchy but never are on the platform. Generally this is used
// so notify the platform that a view exists so that we can keep EventEmitters
// around, to notify JS of something. This mechanism is DEPRECATED and it is
// highly recommended that you NOT make use of this in your platform!
bool mutatedViewIsVirtual() const;
private:
ShadowViewMutation(
Type type,
ShadowView parentShadowView,
ShadowView oldChildShadowView,
ShadowView newChildShadowView,
int index);
};
using ShadowViewMutationList = std::vector<ShadowViewMutation>;
#if RN_DEBUG_STRING_CONVERTIBLE
std::string getDebugName(const ShadowViewMutation& mutation);
std::vector<DebugStringConvertibleObject> getDebugProps(
const ShadowViewMutation& mutation,
DebugStringConvertibleOptions options);
#endif
} // namespace facebook::react