static void YGDistributeFreeSpaceFirstPass()

in yoga/Yoga.cpp [2241:2323]
68 lines of code
15 McCabe index (conditional complexity)

static void YGDistributeFreeSpaceFirstPass(
    YGCollectFlexItemsRowValues& collectedFlexItemsValues,
    const YGFlexDirection mainAxis,
    const float mainAxisownerSize,
    const float availableInnerMainDim,
    const float availableInnerWidth) {
  float flexShrinkScaledFactor = 0;
  float flexGrowFactor = 0;
  float baseMainSize = 0;
  float boundMainSize = 0;
  float deltaFreeSpace = 0;

  for (auto currentRelativeChild : collectedFlexItemsValues.relativeChildren) {
    float childFlexBasis =
        YGNodeBoundAxisWithinMinAndMax(
            currentRelativeChild,
            mainAxis,
            currentRelativeChild->getLayout().computedFlexBasis,
            mainAxisownerSize)
            .unwrap();

    if (collectedFlexItemsValues.remainingFreeSpace < 0) {
      flexShrinkScaledFactor =
          -currentRelativeChild->resolveFlexShrink() * childFlexBasis;

      // Is this child able to shrink?
      if (!YGFloatIsUndefined(flexShrinkScaledFactor) &&
          flexShrinkScaledFactor != 0) {
        baseMainSize = childFlexBasis +
            collectedFlexItemsValues.remainingFreeSpace /
                collectedFlexItemsValues.totalFlexShrinkScaledFactors *
                flexShrinkScaledFactor;
        boundMainSize = YGNodeBoundAxis(
            currentRelativeChild,
            mainAxis,
            baseMainSize,
            availableInnerMainDim,
            availableInnerWidth);
        if (!YGFloatIsUndefined(baseMainSize) &&
            !YGFloatIsUndefined(boundMainSize) &&
            baseMainSize != boundMainSize) {
          // By excluding this item's size and flex factor from remaining, this
          // item's min/max constraints should also trigger in the second pass
          // resulting in the item's size calculation being identical in the
          // first and second passes.
          deltaFreeSpace += boundMainSize - childFlexBasis;
          collectedFlexItemsValues.totalFlexShrinkScaledFactors -=
              (-currentRelativeChild->resolveFlexShrink() *
               currentRelativeChild->getLayout().computedFlexBasis.unwrap());
        }
      }
    } else if (
        !YGFloatIsUndefined(collectedFlexItemsValues.remainingFreeSpace) &&
        collectedFlexItemsValues.remainingFreeSpace > 0) {
      flexGrowFactor = currentRelativeChild->resolveFlexGrow();

      // Is this child able to grow?
      if (!YGFloatIsUndefined(flexGrowFactor) && flexGrowFactor != 0) {
        baseMainSize = childFlexBasis +
            collectedFlexItemsValues.remainingFreeSpace /
                collectedFlexItemsValues.totalFlexGrowFactors * flexGrowFactor;
        boundMainSize = YGNodeBoundAxis(
            currentRelativeChild,
            mainAxis,
            baseMainSize,
            availableInnerMainDim,
            availableInnerWidth);

        if (!YGFloatIsUndefined(baseMainSize) &&
            !YGFloatIsUndefined(boundMainSize) &&
            baseMainSize != boundMainSize) {
          // By excluding this item's size and flex factor from remaining, this
          // item's min/max constraints should also trigger in the second pass
          // resulting in the item's size calculation being identical in the
          // first and second passes.
          deltaFreeSpace += boundMainSize - childFlexBasis;
          collectedFlexItemsValues.totalFlexGrowFactors -= flexGrowFactor;
        }
      }
    }
  }
  collectedFlexItemsValues.remainingFreeSpace -= deltaFreeSpace;
}