# cmd_hold.ludic - `hold <id or key> <pseudo>`: a pseudo-class held on for an element from the next frame,
# on top of the real input (ludic.ui's held.ludic); "" as the pseudo lets that element's holds go, and
# "" "" every hold. Holds are by the element's key, so they survive `model` and `load`; `reset` clears.
function pv_hold(ui_st: mut UiState, w: []string) -> string {
  if len(w) < 3 { return "hold: <id or key> <hover|active|focus|focus-visible|checked|disabled>, \"\" to let go" }
  let id = pv_text(w[1])
  let pseudo = pv_text(w[2])
  if id == "" {
    if pseudo != "" { return "hold: a pseudo-class needs an element" }
    ui_hold_clear(ui_st, "")
    return ""
  }
  let n = ui_find(ui_st, id)
  if n == null { return `no element {id}` }
  if pseudo == "" {
    ui_hold_clear(ui_st, n.key)
    return ""
  }
  if not ui_hold(ui_st, n.key, pseudo) { return `hold: {pseudo} cannot be held (hover, active, focus, focus-visible, checked, disabled)` }
  return ""
}