mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
4ae9ec128d
Summary: Reasons: * The name of the method now better represent what it's doing; * It exposes information about "dirty" state of the node without opening actual `LayoutableShadowNode` protected APIs; * It's a tiny bit faster now because it checks the flag before calling Yoga. Changelog: [Internal] Fabric-specific internal change. Reviewed By: sammy-SC Differential Revision: D19596282 fbshipit-source-id: 3d87d9d5ba20bb8e360683f149b5ebf90beecd65
93 lines
2.5 KiB
C++
93 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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bool RootShadowNode::layoutIfNeeded(
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std::vector<LayoutableShadowNode const *> *affectedNodes) {
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SystraceSection s("RootShadowNode::layout");
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if (getIsLayoutClean()) {
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return false;
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}
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ensureUnsealed();
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auto layoutContext = getProps()->layoutContext;
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layoutContext.affectedNodes = affectedNodes;
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layout(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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return true;
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}
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RootShadowNode::Unshared RootShadowNode::clone(
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LayoutConstraints const &layoutConstraints,
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LayoutContext const &layoutContext) const {
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auto props = std::make_shared<RootProps const>(
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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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/* .props = */ props,
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});
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return newRootShadowNode;
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}
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RootShadowNode::Unshared RootShadowNode::clone(
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ShadowNodeFamily const &shadowNodeFamily,
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std::function<ShadowNode::Unshared(ShadowNode const &oldShadowNode)>
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callback) const {
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auto ancestors = shadowNodeFamily.getAncestors(*this);
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if (ancestors.size() == 0) {
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return RootShadowNode::Unshared{nullptr};
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}
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auto &parent = ancestors.back();
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auto &oldShadowNode = parent.first.get().getChildren().at(parent.second);
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auto newShadowNode = callback(*oldShadowNode);
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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::propsPlaceholder(),
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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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