mirror of
https://github.com/zhigang1992/react-native.git
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035e0403bb
Summary: Trivial. We are replacing rootTag with surfaceId according to the plan describing here: https://fb.workplace.com/groups/rn.fabric/permalink/1374002366064519/ Reviewed By: JoshuaGross, mdvacca Differential Revision: D15039134 fbshipit-source-id: ec8c3044f9f3f23939488bc01c66e9b653e651dd
80 lines
2.4 KiB
C++
80 lines
2.4 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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if (getHasNewLayout()) {
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setLayoutMetrics(layoutMetricsFromYogaNode(yogaNode_));
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setHasNewLayout(false);
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}
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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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/* .surfaceId = */ 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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SharedShadowNode const &oldShadowNode,
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SharedShadowNode const &newShadowNode) const {
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auto ancestors = oldShadowNode->getAncestors(*this);
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if (ancestors.size() == 0) {
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return UnsharedRootShadowNode{nullptr};
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}
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auto childNode = newShadowNode;
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for (auto it = ancestors.rbegin(); it != ancestors.rend(); ++it) {
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auto &parentNode = it->first.get();
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auto childIndex = it->second;
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auto children = parentNode.getChildren();
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assert(ShadowNode::sameFamily(*children.at(childIndex), *childNode));
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children[childIndex] = childNode;
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childNode = parentNode.clone({
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ShadowNodeFragment::tagPlaceholder(),
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ShadowNodeFragment::surfaceIdPlaceholder(),
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ShadowNodeFragment::propsPlaceholder(),
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ShadowNodeFragment::eventEmitterPlaceholder(),
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std::make_shared<SharedShadowNodeList>(children),
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});
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}
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return std::const_pointer_cast<RootShadowNode>(
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std::static_pointer_cast<RootShadowNode const>(childNode));
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}
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} // namespace react
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} // namespace facebook
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