package ui

import (
	"opslag.de/schobers/geom"
)

var _ Control = &stretch{}

type fixed struct {
	Proxy

	size geom.PointF32
}

func (f *fixed) DesiredSize(ctx Context) geom.PointF32 {
	w, h := f.size.X, f.size.Y
	if geom.IsNaN32(w) || geom.IsNaN32(h) {
		child := f.Content.DesiredSize(ctx)
		if geom.IsNaN32(w) {
			w = child.X
		}
		if geom.IsNaN32(h) {
			h = child.Y
		}
	}
	return geom.PtF32(w, h)
}

// Fixed wraps the supplied control to fill exactly the space specified.
func Fixed(c Control, w, h float32) Control {
	return &fixed{Proxy{Content: c}, geom.PtF32(w, h)}
}

// FixedHeight wraps the supplied control to fill exactly the height specified. Width is taken from wrapped control.
func FixedHeight(c Control, h float32) Control {
	return Fixed(c, geom.NaN32(), h)
}

// FixedWidth wraps the supplied control to fill exactly the width specified. Height is taken from wrapped control.
func FixedWidth(c Control, w float32) Control {
	return Fixed(c, w, geom.NaN32())
}