mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
13bc3c87ef
Summary: We don't need a shared_ptr here and without it the code will be faster and simpler. This change is aligned with any clone-line callbacks we have in the Core which accepts a `const &` and return `shared_ptr<>`. Changelog: [Internal] Fabric-specific internal change. Reviewed By: JoshuaGross, sammy-SC Differential Revision: D23725687 fbshipit-source-id: 1cd959f4273913175d342302e2f12752f0114768
117 lines
3.2 KiB
C++
117 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) Facebook, Inc. and its 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 <better/mutex.h>
|
|
#include <memory>
|
|
|
|
#include <react/renderer/components/root/RootComponentDescriptor.h>
|
|
#include <react/renderer/components/root/RootShadowNode.h>
|
|
#include <react/renderer/core/LayoutConstraints.h>
|
|
#include <react/renderer/core/ReactPrimitives.h>
|
|
#include <react/renderer/core/ShadowNode.h>
|
|
#include <react/renderer/mounting/MountingCoordinator.h>
|
|
#include <react/renderer/mounting/ShadowTreeDelegate.h>
|
|
#include <react/renderer/mounting/ShadowTreeRevision.h>
|
|
#include "MountingOverrideDelegate.h"
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
using ShadowTreeCommitTransaction = std::function<RootShadowNode::Unshared(
|
|
RootShadowNode const &oldRootShadowNode)>;
|
|
|
|
/*
|
|
* Represents the shadow tree and its lifecycle.
|
|
*/
|
|
class ShadowTree final {
|
|
public:
|
|
enum class CommitStatus {
|
|
Succeeded,
|
|
Failed,
|
|
Cancelled,
|
|
};
|
|
|
|
/*
|
|
* Creates a new shadow tree instance.
|
|
*/
|
|
ShadowTree(
|
|
SurfaceId surfaceId,
|
|
LayoutConstraints const &layoutConstraints,
|
|
LayoutContext const &layoutContext,
|
|
RootComponentDescriptor const &rootComponentDescriptor,
|
|
ShadowTreeDelegate const &delegate,
|
|
std::weak_ptr<MountingOverrideDelegate const> mountingOverrideDelegate,
|
|
bool enableReparentingDetection = false);
|
|
|
|
~ShadowTree();
|
|
|
|
/*
|
|
* Returns the `SurfaceId` associated with the shadow tree.
|
|
*/
|
|
SurfaceId getSurfaceId() const;
|
|
|
|
/*
|
|
* Performs commit calling `transaction` function with a `oldRootShadowNode`
|
|
* and expecting a `newRootShadowNode` as a return value.
|
|
* The `transaction` function can cancel commit returning `nullptr`.
|
|
*/
|
|
CommitStatus tryCommit(
|
|
ShadowTreeCommitTransaction transaction,
|
|
bool enableStateReconciliation = false) const;
|
|
|
|
/*
|
|
* Calls `tryCommit` in a loop until it finishes successfully.
|
|
*/
|
|
CommitStatus commit(
|
|
ShadowTreeCommitTransaction transaction,
|
|
bool enableStateReconciliation = false) const;
|
|
|
|
/*
|
|
* Returns a `ShadowTreeRevision` representing the momentary state of
|
|
* the `ShadowTree`.
|
|
*/
|
|
ShadowTreeRevision getCurrentRevision() const;
|
|
|
|
/*
|
|
* Commit an empty tree (a new `RootShadowNode` with no children).
|
|
*/
|
|
void commitEmptyTree() const;
|
|
|
|
/**
|
|
* Forces the ShadowTree to ping its delegate that an update is available.
|
|
* Useful for animations on Android.
|
|
* @return
|
|
*/
|
|
void notifyDelegatesOfUpdates() const;
|
|
|
|
MountingCoordinator::Shared getMountingCoordinator() const;
|
|
|
|
/*
|
|
* Temporary.
|
|
* Do not use.
|
|
*/
|
|
void setEnableReparentingDetection(bool value) {
|
|
enableReparentingDetection_ = value;
|
|
}
|
|
|
|
private:
|
|
void emitLayoutEvents(
|
|
std::vector<LayoutableShadowNode const *> &affectedLayoutableNodes) const;
|
|
|
|
SurfaceId const surfaceId_;
|
|
ShadowTreeDelegate const &delegate_;
|
|
mutable better::shared_mutex commitMutex_;
|
|
mutable ShadowTreeRevision currentRevision_; // Protected by `commitMutex_`.
|
|
MountingCoordinator::Shared mountingCoordinator_;
|
|
bool enableReparentingDetection_{false};
|
|
};
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|