#include <psemek/ui/impl/size_constraints.hpp>

namespace psemek::ui::impl
{

	size_constraints size_constraints::max()
	{
		return
		{{{
			{0.f, infinity},
			{0.f, infinity},
		}}};
	}

	size_constraints shift(size_constraints const & constraints, geom::vector<float, 2> const & delta)
	{
		return {constraints.box + delta};
	}

	size_constraints scale(size_constraints const & constraints, float factor, int dimension)
	{
		auto result = constraints;
		result.box[dimension].min *= factor;
		result.box[dimension].max *= factor;
		return result;
	}

	float min(size_constraints const & constraints, int dimension)
	{
		return constraints.box[dimension].min;
	}

	size_constraints intersect(size_constraints const & constraints1, size_constraints const & constraints2)
	{
		return {constraints1.box & constraints2.box};
	}

	geom::interval<float> range(size_constraints const & constraints, int dimension)
	{
		return constraints.box[dimension];
	}

	size_constraints cut(size_constraints const & constraints, int dimension, geom::interval<float> const & range)
	{
		size_constraints result = constraints;
		result.box[dimension] &= range;
		return result;
	}

	size_constraints sum_along(size_constraints const & constraints1, size_constraints const & constraints2, int dimension)
	{
		size_constraints result;
		result.box[dimension].min = constraints1.box[dimension].min + constraints2.box[dimension].min;
		result.box[dimension].max = constraints1.box[dimension].max + constraints2.box[dimension].max;
		result.box[dimension ^ 1] = constraints1.box[dimension ^ 1] & constraints2.box[dimension ^ 1];
		return result;
	}

}