45 lines
1.2 KiB
C
45 lines
1.2 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 <react/renderer/mounting/MountingCoordinator.h>
|
||
|
|
|
||
|
|
namespace facebook {
|
||
|
|
namespace react {
|
||
|
|
|
||
|
|
class ShadowTree;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Abstract class for ShadowTree's delegate.
|
||
|
|
*/
|
||
|
|
class ShadowTreeDelegate {
|
||
|
|
public:
|
||
|
|
/*
|
||
|
|
* Called right before a ShadowTree commits a new tree.
|
||
|
|
* The receiver can alter a new (proposed) shadow tree with another tree
|
||
|
|
* by returning the altered tree.
|
||
|
|
* Returning a `nullptr` cancels the commit.
|
||
|
|
*/
|
||
|
|
virtual RootShadowNode::Unshared shadowTreeWillCommit(
|
||
|
|
ShadowTree const &shadowTree,
|
||
|
|
RootShadowNode::Shared const &oldRootShadowNode,
|
||
|
|
RootShadowNode::Unshared const &newRootShadowNode) const = 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Called right after Shadow Tree commit a new state of the tree.
|
||
|
|
*/
|
||
|
|
virtual void shadowTreeDidFinishTransaction(
|
||
|
|
MountingCoordinator::Shared mountingCoordinator,
|
||
|
|
bool mountSynchronously) const = 0;
|
||
|
|
|
||
|
|
virtual ~ShadowTreeDelegate() noexcept = default;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace react
|
||
|
|
} // namespace facebook
|