static YGSize YGJNIMeasureFunc()

in java/jni/YGJNIVanilla.cpp [643:682]
36 lines of code
4 McCabe index (conditional complexity)

static YGSize YGJNIMeasureFunc(
    YGNodeRef node,
    float width,
    YGMeasureMode widthMode,
    float height,
    YGMeasureMode heightMode,
    void* layoutContext) {
  if (auto obj = YGNodeJobject(node, layoutContext)) {
    YGTransferLayoutDirection(node, obj.get());
    JNIEnv* env = getCurrentEnv();
    auto objectClass = facebook::yoga::vanillajni::make_local_ref(
        env, env->GetObjectClass(obj.get()));
    static const jmethodID methodId = facebook::yoga::vanillajni::getMethodId(
        env, objectClass.get(), "measure", "(FIFI)J");
    const auto measureResult = facebook::yoga::vanillajni::callLongMethod(
        env, obj.get(), methodId, width, widthMode, height, heightMode);

    static_assert(
        sizeof(measureResult) == 8,
        "Expected measureResult to be 8 bytes, or two 32 bit ints");

    int32_t wBits = 0xFFFFFFFF & (measureResult >> 32);
    int32_t hBits = 0xFFFFFFFF & measureResult;

    const float* measuredWidth = reinterpret_cast<float*>(&wBits);
    const float* measuredHeight = reinterpret_cast<float*>(&hBits);

    return YGSize{*measuredWidth, *measuredHeight};
  } else {
    Log::log(
        node,
        YGLogLevelError,
        nullptr,
        "Java YGNode was GCed during layout calculation\n");
    return YGSize{
        widthMode == YGMeasureModeUndefined ? 0 : width,
        heightMode == YGMeasureModeUndefined ? 0 : height,
    };
  }
}