package typeset

import "golang.org/x/image/font"
import "golang.org/x/image/math/fixed"

func recommendHeight (tokens []token, face font.Face, width fixed.Int26_6) fixed.Int26_6 {	
	metrics := face.Metrics()
	var dot fixed.Point26_6

	newline := func () {
		dot.Y  += metrics.Height
		dot.X   = 0
	}

	sawLineBreak := false
	for _, token := range tokens {
		// demarcate lines
		if sawLineBreak {
			newline()
			sawLineBreak = false
		}
		if token.kind == tokenKindLineBreak {
			sawLineBreak = true
		} else {
			needWrap :=
				token.kind == tokenKindWord &&
				dot.X + token.width > width
			if needWrap {
				newline()
			}
			dot.X += token.width
		}
	}
	newline()
	
	return dot.Y
}