mirror of
https://github.com/zhigang1992/react-native.git
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b30b10326e
Summary: This pull request removes the designated initializers in `RootShadowNode.cpp`. This will help improve the portability of this file. [General] [Fixed] - Removed designated initializers in `RootShadowNode` Pull Request resolved: https://github.com/facebook/react-native/pull/23715 Differential Revision: D14305167 Pulled By: shergin fbshipit-source-id: e394580f103fdb59cf078828b5d2ee6df6cc534d
82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include "RootShadowNode.h"
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#include <react/components/view/conversions.h>
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#include <react/debug/SystraceSection.h>
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namespace facebook {
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namespace react {
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const char RootComponentName[] = "RootView";
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void RootShadowNode::layout() {
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SystraceSection s("RootShadowNode::layout");
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ensureUnsealed();
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layout(getProps()->layoutContext);
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// This is the rare place where shadow node must layout (set `layoutMetrics`)
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// itself because there is no a parent node which usually should do it.
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setLayoutMetrics(layoutMetricsFromYogaNode(yogaNode_));
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}
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UnsharedRootShadowNode RootShadowNode::clone(
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const LayoutConstraints &layoutConstraints,
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const LayoutContext &layoutContext) const {
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auto props = std::make_shared<const RootProps>(
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*getProps(), layoutConstraints, layoutContext);
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auto newRootShadowNode = std::make_shared<RootShadowNode>(
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*this,
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ShadowNodeFragment{
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/* .tag = */ ShadowNodeFragment::tagPlaceholder(),
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/* .rootTag = */ ShadowNodeFragment::surfaceIdPlaceholder(),
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/* .props = */ props,
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});
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return newRootShadowNode;
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}
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UnsharedRootShadowNode RootShadowNode::clone(
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const SharedShadowNode &oldShadowNode,
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const SharedShadowNode &newShadowNode) const {
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std::vector<std::reference_wrapper<const ShadowNode>> ancestors;
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if (!oldShadowNode->constructAncestorPath(*this, ancestors)) {
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return UnsharedRootShadowNode{nullptr};
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}
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auto oldChild = oldShadowNode;
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auto newChild = newShadowNode;
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for (const auto &ancestor : ancestors) {
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auto oldParent = ancestor.get().shared_from_this();
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auto children = oldParent->getChildren();
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std::replace(children.begin(), children.end(), oldChild, newChild);
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auto sharedChildren = std::make_shared<SharedShadowNodeList>(children);
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auto newParent = oldParent->clone({
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/* .tag = */ ShadowNodeFragment::tagPlaceholder(),
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/* .rootTag = */ ShadowNodeFragment::surfaceIdPlaceholder(),
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/* .props = */ ShadowNodeFragment::propsPlaceholder(),
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/* .eventEmitter = */ ShadowNodeFragment::eventEmitterPlaceholder(),
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/* .children = */ sharedChildren,
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});
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newParent->replaceChild(oldChild, newChild);
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oldChild = oldParent;
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newChild = newParent;
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}
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return std::const_pointer_cast<RootShadowNode>(
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std::static_pointer_cast<const RootShadowNode>(newChild));
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}
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} // namespace react
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} // namespace facebook
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