# attr_fit.ludic - aspect-ratio (16 / 9, or 1.5), object-fit (fill, contain, cover, none, scale-down)
# for pictures and natives, zoom (zoom.ludic), and a list split at its top-level commas
function el_fit_props(ui_st: mut UiState, n: UiNode, key: string, s: string) -> bool {
  if key == "aspect-ratio" {
    let parts = mm_split(ui_st, s, 47)
    var r = el_num(tpl_words(parts[0]))
    if len(parts) > 1 and el_num(tpl_words(parts[1])) > 0.0 { r = r / el_num(tpl_words(parts[1])) }
    if tpl_words(s) == "auto" { r = 0.0 }
    nx(n).ratio = Math.max(r, 0.0)
  } else if key == "object-fit" {
    let w = tpl_words(s)
    var k = 0
    if w == "contain" { k = 1 } else if w == "cover" { k = 2 } else if w == "none" { k = 3 } else if w == "scale-down" { k = 4 }
    nx(n).fit_obj = k
  } else if key == "zoom" { el_zoom(ui_st, n, s) } else { return false }
  return true
}
# "a, rgba(1, 2, 3, 0.5) 40%, b" -> its three parts
@alloc_ok("a gradient being read, on a memo miss")
function el_commas(s: string) -> []string {
  let out = new []string
  var at = 0
  var depth = 0
  for i in 0 .. len(s) {
    if s[i] == 40 { depth += 1 }
    if s[i] == 41 { depth -= 1 }
    if s[i] == 44 and depth == 0 {
      push(out, s[at..i])
      at = i + 1
    }
  }
  push(out, s[at..len(s)])
  return out
}