mirror of
https://github.com/zhigang1992/react-native.git
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77838b5504
Summary: It's better to comment `DWITH_FBSYSTRACE` out in BUCK files instead of removing them from the code. I'll publish the BUCK changes as separate diff for simpler backout in the future. Reviewed By: mdvacca Differential Revision: D14019272 fbshipit-source-id: 8b322b5c115efe33c15929e008b97a05220813df
69 lines
2.1 KiB
C++
69 lines
2.1 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, ShadowNodeFragment{.props = props});
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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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oldShadowNode->constructAncestorPath(*this, ancestors);
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if (ancestors.size() == 0) {
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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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SharedShadowNodeUnsharedList sharedChildren;
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for (const auto &ancestor : ancestors) {
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auto children = ancestor.get().getChildren();
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std::replace(children.begin(), children.end(), oldChild, newChild);
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sharedChildren = std::make_shared<SharedShadowNodeList>(children);
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oldChild = ancestor.get().shared_from_this();
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newChild = oldChild->clone(ShadowNodeFragment{.children = sharedChildren});
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}
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return std::make_shared<RootShadowNode>(
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*this, ShadowNodeFragment{.children = sharedChildren});
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}
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} // namespace react
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} // namespace facebook
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