static float YGBaseline()

in yoga/Yoga.cpp [1050:1096]

• 39 lines of code
• 9 McCabe index (conditional complexity)

static float YGBaseline(const YGNodeRef node, void* layoutContext) {
  if (node->hasBaselineFunc()) {

    Event::publish<Event::NodeBaselineStart>(node);

    const float baseline = node->baseline(
        node->getLayout().measuredDimensions[YGDimensionWidth],
        node->getLayout().measuredDimensions[YGDimensionHeight],
        layoutContext);

    Event::publish<Event::NodeBaselineEnd>(node);

    YGAssertWithNode(
        node,
        !YGFloatIsUndefined(baseline),
        "Expect custom baseline function to not return NaN");
    return baseline;
  }

  YGNodeRef baselineChild = nullptr;
  const uint32_t childCount = YGNodeGetChildCount(node);
  for (uint32_t i = 0; i < childCount; i++) {
    const YGNodeRef child = YGNodeGetChild(node, i);
    if (child->getLineIndex() > 0) {
      break;
    }
    if (child->getStyle().positionType() == YGPositionTypeAbsolute) {
      continue;
    }
    if (YGNodeAlignItem(node, child) == YGAlignBaseline ||
        child->isReferenceBaseline()) {
      baselineChild = child;
      break;
    }

    if (baselineChild == nullptr) {
      baselineChild = child;
    }
  }

  if (baselineChild == nullptr) {
    return node->getLayout().measuredDimensions[YGDimensionHeight];
  }

  const float baseline = YGBaseline(baselineChild, layoutContext);
  return baseline + baselineChild->getLayout().position[YGEdgeTop];
}