package layouts

import "image"
import "git.tebibyte.media/tomo/tomo"

var _ tomo.Layout = ContractVertical

// Contract is a layout that arranges boxes in a simple row or column according
// to their minimum sizes.
type Contract bool

// ContractVertical is a vertical contracted layout.
const ContractVertical Contract = true

// ContractHorizontal is a horizontal contracted layout.
const ContractHorizontal Contract = false

func (contract Contract) MinimumSize (hints tomo.LayoutHints, boxes []tomo.Box) image.Point {
	return contract.fallback().MinimumSize(hints, boxes)
}

func (contract Contract) Arrange (hints tomo.LayoutHints, boxes []tomo.Box) {
	contract.fallback().Arrange(hints, boxes)
}

func (contract Contract) RecommendedHeight (hints tomo.LayoutHints, boxes []tomo.Box, width int) int {
	return contract.fallback().RecommendedHeight(hints, boxes, width)
}

func (contract Contract) RecommendedWidth (hints tomo.LayoutHints, boxes []tomo.Box, height int) int {
	return contract.fallback().RecommendedWidth(hints, boxes, height)
}

func (contract Contract) fallback () tomo.Layout {
	if contract == ContractVertical {
		return Column { }
	} else {
		return Row { }
	}
}