99 lines
2.3 KiB
C++
99 lines
2.3 KiB
C++
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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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 "LayoutableShadowNode.h"
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#include <fabric/core/LayoutConstraints.h>
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#include <fabric/core/LayoutContext.h>
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#include <fabric/core/LayoutMetrics.h>
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namespace facebook {
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namespace react {
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LayoutMetrics LayoutableShadowNode::getLayoutMetrics() const {
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return layoutMetrics_;
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}
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bool LayoutableShadowNode::setLayoutMetrics(LayoutMetrics layoutMetrics) {
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if (layoutMetrics_ == layoutMetrics) {
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return false;
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}
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ensureUnsealed();
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layoutMetrics_ = layoutMetrics;
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return true;
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}
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void LayoutableShadowNode::cleanLayout() {
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isLayoutClean_ = true;
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}
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void LayoutableShadowNode::dirtyLayout() {
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isLayoutClean_ = false;
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}
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bool LayoutableShadowNode::getIsLayoutClean() const {
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return isLayoutClean_;
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}
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bool LayoutableShadowNode::getHasNewLayout() const {
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return hasNewLayout_;
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};
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void LayoutableShadowNode::setHasNewLayout(bool hasNewLayout) {
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hasNewLayout_ = hasNewLayout;
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}
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Size LayoutableShadowNode::measure(LayoutConstraints layoutConstraints) const {
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return Size();
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}
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Float LayoutableShadowNode::firstBaseline(Size size) const {
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return 0;
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}
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Float LayoutableShadowNode::lastBaseline(Size size) const {
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return 0;
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}
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void LayoutableShadowNode::layout(LayoutContext layoutContext) {
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layoutChildren(layoutContext);
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for (auto child : getLayoutableChildNodes()) {
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if (!child->getHasNewLayout()) {
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continue;
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}
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child->ensureUnsealed();
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// The assumption:
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// All `sealed` children were replaced with not-yet-sealed clones
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// somewhere in `layoutChildren`.
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auto nonConstChild = std::const_pointer_cast<LayoutableShadowNode>(child);
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nonConstChild->setHasNewLayout(false);
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const LayoutMetrics childLayoutMetrics = nonConstChild->getLayoutMetrics();
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if (childLayoutMetrics.displayType == DisplayType::None) {
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continue;
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}
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LayoutContext childLayoutContext = LayoutContext(layoutContext);
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childLayoutContext.absolutePosition += childLayoutMetrics.frame.origin;
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nonConstChild->layout(layoutContext);
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}
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}
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void LayoutableShadowNode::layoutChildren(LayoutContext layoutContext) {
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// Default implementation does nothing.
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}
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} // namespace react
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} // namespace facebook
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