static YGCollectFlexItemsRowValues YGCalculateCollectFlexItemsRowValues()

in yoga/Yoga.cpp [1960:2037]
61 lines of code
12 McCabe index (conditional complexity)

static YGCollectFlexItemsRowValues YGCalculateCollectFlexItemsRowValues(
    const YGNodeRef& node,
    const YGDirection ownerDirection,
    const float mainAxisownerSize,
    const float availableInnerWidth,
    const float availableInnerMainDim,
    const uint32_t startOfLineIndex,
    const uint32_t lineCount) {
  YGCollectFlexItemsRowValues flexAlgoRowMeasurement = {};
  flexAlgoRowMeasurement.relativeChildren.reserve(node->getChildren().size());

  float sizeConsumedOnCurrentLineIncludingMinConstraint = 0;
  const YGFlexDirection mainAxis = YGResolveFlexDirection(
      node->getStyle().flexDirection(), node->resolveDirection(ownerDirection));
  const bool isNodeFlexWrap = node->getStyle().flexWrap() != YGWrapNoWrap;

  // Add items to the current line until it's full or we run out of items.
  uint32_t endOfLineIndex = startOfLineIndex;
  for (; endOfLineIndex < node->getChildren().size(); endOfLineIndex++) {
    const YGNodeRef child = node->getChild(endOfLineIndex);
    if (child->getStyle().display() == YGDisplayNone ||
        child->getStyle().positionType() == YGPositionTypeAbsolute) {
      continue;
    }
    child->setLineIndex(lineCount);
    const float childMarginMainAxis =
        child->getMarginForAxis(mainAxis, availableInnerWidth).unwrap();
    const float flexBasisWithMinAndMaxConstraints =
        YGNodeBoundAxisWithinMinAndMax(
            child,
            mainAxis,
            child->getLayout().computedFlexBasis,
            mainAxisownerSize)
            .unwrap();

    // If this is a multi-line flow and this item pushes us over the available
    // size, we've hit the end of the current line. Break out of the loop and
    // lay out the current line.
    if (sizeConsumedOnCurrentLineIncludingMinConstraint +
                flexBasisWithMinAndMaxConstraints + childMarginMainAxis >
            availableInnerMainDim &&
        isNodeFlexWrap && flexAlgoRowMeasurement.itemsOnLine > 0) {
      break;
    }

    sizeConsumedOnCurrentLineIncludingMinConstraint +=
        flexBasisWithMinAndMaxConstraints + childMarginMainAxis;
    flexAlgoRowMeasurement.sizeConsumedOnCurrentLine +=
        flexBasisWithMinAndMaxConstraints + childMarginMainAxis;
    flexAlgoRowMeasurement.itemsOnLine++;

    if (child->isNodeFlexible()) {
      flexAlgoRowMeasurement.totalFlexGrowFactors += child->resolveFlexGrow();

      // Unlike the grow factor, the shrink factor is scaled relative to the
      // child dimension.
      flexAlgoRowMeasurement.totalFlexShrinkScaledFactors +=
          -child->resolveFlexShrink() *
          child->getLayout().computedFlexBasis.unwrap();
    }

    flexAlgoRowMeasurement.relativeChildren.push_back(child);
  }

  // The total flex factor needs to be floored to 1.
  if (flexAlgoRowMeasurement.totalFlexGrowFactors > 0 &&
      flexAlgoRowMeasurement.totalFlexGrowFactors < 1) {
    flexAlgoRowMeasurement.totalFlexGrowFactors = 1;
  }

  // The total flex shrink factor needs to be floored to 1.
  if (flexAlgoRowMeasurement.totalFlexShrinkScaledFactors > 0 &&
      flexAlgoRowMeasurement.totalFlexShrinkScaledFactors < 1) {
    flexAlgoRowMeasurement.totalFlexShrinkScaledFactors = 1;
  }
  flexAlgoRowMeasurement.endOfLineIndex = endOfLineIndex;
  return flexAlgoRowMeasurement;
}