// usage creates any necessary tags for actually using the service in the SVG.
func (s *service) usage(canvas *svg.SVG, iconIds map[string]string) {
canvas.Use(
s.point.X,
s.point.Y,
"#serviceBlock",
fmt.Sprintf(`id=%q`, s.name))
if len(s.iconSrc) > 0 {
canvas.Use(
s.point.X+serviceBlockSize/2-iconSize/2,
s.point.Y+serviceBlockSize/2-iconSize/2,
"#"+iconIds[s.charmPath],
fmt.Sprintf(`width="%d" height="%d"`, iconSize, iconSize),
)
} else {
canvas.Image(
s.point.X+serviceBlockSize/2-iconSize/2,
s.point.Y+serviceBlockSize/2-iconSize/2,
iconSize,
iconSize,
s.iconUrl,
)
}
canvas.Textlines(
s.point.X+serviceBlockSize/2,
s.point.Y+serviceBlockSize/6,
[]string{s.name},
serviceBlockSize/10,
0,
"#505050",
"middle")
}
