mirror of
https://github.com/zhigang1992/react-native.git
synced 2026-06-16 02:04:11 +08:00
4602bf5cc6
Summary: The basic idea of the implementation is the same, but it uses the new method for finding parenting chain and it does not use `shared_from_this()` anymore. Reviewed By: JoshuaGross Differential Revision: D14416949 fbshipit-source-id: 13ef928505a60280e2a6c30c76ac87d91cee326e
80 lines
2.4 KiB
C++
80 lines
2.4 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.
|
|
*/
|
|
|
|
#include "RootShadowNode.h"
|
|
|
|
#include <react/components/view/conversions.h>
|
|
#include <react/debug/SystraceSection.h>
|
|
|
|
namespace facebook {
|
|
namespace react {
|
|
|
|
const char RootComponentName[] = "RootView";
|
|
|
|
void RootShadowNode::layout() {
|
|
SystraceSection s("RootShadowNode::layout");
|
|
ensureUnsealed();
|
|
layout(getProps()->layoutContext);
|
|
|
|
// This is the rare place where shadow node must layout (set `layoutMetrics`)
|
|
// itself because there is no a parent node which usually should do it.
|
|
if (getHasNewLayout()) {
|
|
setLayoutMetrics(layoutMetricsFromYogaNode(yogaNode_));
|
|
setHasNewLayout(false);
|
|
}
|
|
}
|
|
|
|
UnsharedRootShadowNode RootShadowNode::clone(
|
|
const LayoutConstraints &layoutConstraints,
|
|
const LayoutContext &layoutContext) const {
|
|
auto props = std::make_shared<const RootProps>(
|
|
*getProps(), layoutConstraints, layoutContext);
|
|
auto newRootShadowNode = std::make_shared<RootShadowNode>(
|
|
*this,
|
|
ShadowNodeFragment{
|
|
/* .tag = */ ShadowNodeFragment::tagPlaceholder(),
|
|
/* .rootTag = */ ShadowNodeFragment::surfaceIdPlaceholder(),
|
|
/* .props = */ props,
|
|
});
|
|
return newRootShadowNode;
|
|
}
|
|
|
|
UnsharedRootShadowNode RootShadowNode::clone(
|
|
SharedShadowNode const &oldShadowNode,
|
|
SharedShadowNode const &newShadowNode) const {
|
|
auto ancestors = oldShadowNode->getAncestors(*this);
|
|
|
|
if (ancestors.size() == 0) {
|
|
return UnsharedRootShadowNode{nullptr};
|
|
}
|
|
|
|
auto childNode = newShadowNode;
|
|
|
|
for (auto it = ancestors.rbegin(); it != ancestors.rend(); ++it) {
|
|
auto &parentNode = it->first.get();
|
|
auto childIndex = it->second;
|
|
|
|
auto children = parentNode.getChildren();
|
|
assert(ShadowNode::sameFamily(*children.at(childIndex), *childNode));
|
|
children[childIndex] = childNode;
|
|
|
|
childNode = parentNode.clone({
|
|
ShadowNodeFragment::tagPlaceholder(),
|
|
ShadowNodeFragment::surfaceIdPlaceholder(),
|
|
ShadowNodeFragment::propsPlaceholder(),
|
|
ShadowNodeFragment::eventEmitterPlaceholder(),
|
|
std::make_shared<SharedShadowNodeList>(children),
|
|
});
|
|
}
|
|
|
|
return std::const_pointer_cast<RootShadowNode>(
|
|
std::static_pointer_cast<RootShadowNode const>(childNode));
|
|
}
|
|
|
|
} // namespace react
|
|
} // namespace facebook
|