xplat/js/react-native-github/packages/react-native/ReactCommon/yoga/yoga/algorithm/Baseline.cpp

packages/react-native/ReactCommon/yoga/test/BaselineTest.cpp

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include <gtest/gtest.h>
+
+#include <yoga/Yoga.h>
+#include <yoga/algorithm/Baseline.h>
+#include <yoga/enums/Align.h>
+#include <yoga/enums/Dimension.h>
+#include <yoga/enums/FlexDirection.h>
+#include <yoga/enums/PhysicalEdge.h>
+#include <yoga/enums/PositionType.h>
+#include <yoga/node/Node.h>
+
+namespace facebook::yoga {
+namespace {
+
+void setMeasuredSize(Node& node, float width, float height) {
+  node.setLayoutMeasuredDimension(width, Dimension::Width);
+  node.setLayoutMeasuredDimension(height, Dimension::Height);
+}
+
+float baselineFromContext(
+    YGNodeConstRef node,
+    float /*width*/,
+    float /*height*/) {
+  return *static_cast<const float*>(resolveRef(node)->getContext());
+}
+
+TEST(BaselineTest, testCalculateBaselineFallsBackToFirstNonAbsoluteChild) {
+  Node root;
+  Node absoluteChild;
+  Node child;
+
+  setMeasuredSize(root, 100.0f, 200.0f);
+  setMeasuredSize(absoluteChild, 10.0f, 7.0f);
+  setMeasuredSize(child, 30.0f, 20.0f);
+  absoluteChild.style().setPositionType(PositionType::Absolute);
+  child.setLayoutPosition(30.0f, PhysicalEdge::Top);
+  root.setChildren({&absoluteChild, &child});
+
+  EXPECT_FLOAT_EQ(50.0f, calculateBaseline(&root));
+}
+
+TEST(BaselineTest, testCalculateBaselineUsesReferenceBaselineChild) {
+  Node root;
+  Node firstChild;
+  Node referenceChild;
+  float referenceBaseline = 17.0f;
+
+  setMeasuredSize(firstChild, 30.0f, 80.0f);
+  setMeasuredSize(referenceChild, 30.0f, 40.0f);
+  firstChild.setLayoutPosition(5.0f, PhysicalEdge::Top);
+  referenceChild.setLayoutPosition(12.0f, PhysicalEdge::Top);
+  referenceChild.setContext(&referenceBaseline);
+  referenceChild.setBaselineFunc(baselineFromContext);
+  referenceChild.setIsReferenceBaseline(true);
+  root.setChildren({&firstChild, &referenceChild});
+
+  EXPECT_FLOAT_EQ(29.0f, calculateBaseline(&root));
+}
+
+TEST(BaselineTest, testCalculateBaselineIgnoresChildrenAfterFirstLine) {
+  Node root;
+  Node firstLineChild;
+  Node secondLineChild;
+  float secondLineBaseline = 3.0f;
+
+  setMeasuredSize(firstLineChild, 30.0f, 20.0f);
+  setMeasuredSize(secondLineChild, 30.0f, 10.0f);
+  firstLineChild.setLayoutPosition(4.0f, PhysicalEdge::Top);
+  secondLineChild.setLayoutPosition(100.0f, PhysicalEdge::Top);
+  secondLineChild.setLineIndex(1);
+  secondLineChild.setContext(&secondLineBaseline);
+  secondLineChild.setBaselineFunc(baselineFromContext);
+  secondLineChild.setIsReferenceBaseline(true);
+  root.setChildren({&firstLineChild, &secondLineChild});
+
+  EXPECT_FLOAT_EQ(24.0f, calculateBaseline(&root));
+}
+
+TEST(BaselineTest, testIsBaselineLayoutRequiresRowAndParticipatingChild) {
+  Node root;
+  Node child;
+
+  root.style().setFlexDirection(FlexDirection::Row);
+  child.style().setAlignSelf(Align::Baseline);
+  root.setChildren({&child});
+
+  EXPECT_TRUE(isBaselineLayout(&root));
+
+  child.style().setPositionType(PositionType::Absolute);
+  EXPECT_FALSE(isBaselineLayout(&root));
+
+  child.style().setPositionType(PositionType::Relative);
+  root.style().setFlexDirection(FlexDirection::Column);
+  root.style().setAlignItems(Align::Baseline);
+  EXPECT_FALSE(isBaselineLayout(&root));
+}
+
+} // namespace
+} // namespace facebook::yoga