include/rive/layout/layout_enums.hpp

#ifndef _RIVE_LAYOUT_ENUMS_HPP_
#define _RIVE_LAYOUT_ENUMS_HPP_

#include <stdint.h>

namespace rive
{
enum class LayoutAnimationStyle : uint8_t
{
  none,
  inherit,
  custom
};

enum class LayoutStyleInterpolation : uint8_t
{
  hold,
  linear,
  cubic,
  elastic,
  // The style's interpolator is a ScriptedInterpolator.
  scripted
};

enum class LayoutAlignmentType : uint8_t
{
  topLeft,
  topCenter,
  topRight,
  centerLeft,
  center,
  centerRight,
  bottomLeft,
  bottomCenter,
  bottomRight,
  spaceBetweenStart,
  spaceBetweenCenter,
  spaceBetweenEnd
};

// Distribution along a container's own main axis.
enum class LayoutMainDistribute : uint8_t
{
  start,
  center,
  end,
  spaceBetween
};

// Placement along a container's own cross axis.
enum class LayoutCrossAlign : uint8_t
{
  start,
  center,
  end
};

struct LayoutContainerAlignment
{
  LayoutMainDistribute main;
  LayoutCrossAlign cross;
};

// The authored alignment on a container's own axes. The 9 positions name
// screen directions, so they swap with the main axis; space-between always
// distributes the main axis.
inline LayoutContainerAlignment containerAlignment(
    LayoutAlignmentType type,
    bool isRow)
{
  LayoutMainDistribute horizontal;
  LayoutCrossAlign vertical;
  switch (type)
  {
    case LayoutAlignmentType::spaceBetweenStart:
      return {LayoutMainDistribute::spaceBetween, LayoutCrossAlign::start};
    case LayoutAlignmentType::spaceBetweenCenter:
      return {LayoutMainDistribute::spaceBetween, LayoutCrossAlign::center};
    case LayoutAlignmentType::spaceBetweenEnd:
      return {LayoutMainDistribute::spaceBetween, LayoutCrossAlign::end};
    case LayoutAlignmentType::topLeft:
    case LayoutAlignmentType::centerLeft:
    case LayoutAlignmentType::bottomLeft:
      horizontal = LayoutMainDistribute::start;
      break;
    case LayoutAlignmentType::topCenter:
    case LayoutAlignmentType::center:
    case LayoutAlignmentType::bottomCenter:
      horizontal = LayoutMainDistribute::center;
      break;
    default:
      horizontal = LayoutMainDistribute::end;
      break;
  }
  switch (type)
  {
    case LayoutAlignmentType::topLeft:
    case LayoutAlignmentType::topCenter:
    case LayoutAlignmentType::topRight:
      vertical = LayoutCrossAlign::start;
      break;
    case LayoutAlignmentType::centerLeft:
    case LayoutAlignmentType::center:
    case LayoutAlignmentType::centerRight:
      vertical = LayoutCrossAlign::center;
      break;
    default:
      vertical = LayoutCrossAlign::end;
      break;
  }
  if (isRow)
  {
    return {horizontal, vertical};
  }
  // A column's main axis is vertical: the vertical intent distributes it.
  return {LayoutMainDistribute(vertical), LayoutCrossAlign(horizontal)};
}

enum class LayoutDirection : uint8_t
{
  inherit,
  ltr,
  rtl
};

enum class LayoutScaleType : uint8_t
{
  fixed,
  fill,
  hug
};
} // namespace rive
#endif