class __attribute__()

in ComponentKit/LayoutComponents/RatioLayoutComponentBuilder.h [27:102]

• 45 lines of code
• 2 McCabe index (conditional complexity)

class __attribute__((__may_alias__)) RatioLayoutComponentBuilder
    : public ComponentBuilderBaseSizeOnly<RatioLayoutComponentBuilder, PropsBitmap> {
 public:
  RatioLayoutComponentBuilder() = default;

  RatioLayoutComponentBuilder(const CK::ComponentSpecContext &context)
    : ComponentBuilderBaseSizeOnly<RatioLayoutComponentBuilder, PropsBitmap>{context} { }

  ~RatioLayoutComponentBuilder() = default;

  /**
   The ratio passed is the ratio of height / width you expect.

   For a ratio 0.5, the component will have a flat rectangle shape
    _ _ _ _
   |       |
   |_ _ _ _|

   For a ratio 2.0, the component will be twice as tall as it is wide
    _ _
   |   |
   |   |
   |   |
   |_ _|
   */
  auto &ratio(CGFloat ratio)
  {
    constexpr auto ratioIsNotSet = !PropBitmap::isSet(PropsBitmap, RatioLayoutComponentPropId::ratio);
    static_assert(ratioIsNotSet, "Property 'ratio' is already set.");
    _ratio = ratio;
    return reinterpret_cast<
      RatioLayoutComponentBuilder<PropsBitmap | RatioLayoutComponentPropId::ratio> &>(*this);
  }

  /**
   The component that will be laid out according to given ratio.
   */
  auto &component(NS_RELEASES_ARGUMENT CKComponent *component)
  {
    constexpr auto componentIsNotSet = !PropBitmap::isSet(PropsBitmap, RatioLayoutComponentPropId::component);
    static_assert(componentIsNotSet, "Property `component` is already set.");
    _component = component;
    return reinterpret_cast<
      RatioLayoutComponentBuilder<PropsBitmap | RatioLayoutComponentPropId::component> &>(*this);
  }

 private:
  friend BuilderBase<RatioLayoutComponentBuilder, PropsBitmap>;

  /**
  Creates a new component instance with specified properties.

  @note This method must @b not be called more than once on a given component builder instance.
  */
  NS_RETURNS_RETAINED auto _build() noexcept -> CKRatioLayoutComponent *
  {
    constexpr auto ratioIsSet = PropBitmap::isSet(PropsBitmap, RatioLayoutComponentPropId::ratio);
    static_assert(ratioIsSet, "Required property 'ratio' is not set.");
    constexpr auto componentIsSet = PropBitmap::isSet(PropsBitmap, RatioLayoutComponentPropId::component);
    static_assert(componentIsSet, "Required property 'component' is not set.");

    if (PropBitmap::isSet(PropsBitmap, ComponentBuilderBaseSizeOnlyPropId::size)) {
      return [[CKRatioLayoutComponent alloc] initWithRatio:_ratio
                                                 size:this->_size
                                                 component:_component];
    } else {
      return [[CKRatioLayoutComponent alloc] initWithRatio:_ratio
                                                      size:{}
                                                 component:_component];
    }
  }

 private:
  CGFloat _ratio{};
  CKComponent *_component;
};