!7

static AutoComboBox3 tf;
static DynamicVStack stack;
static ReliableSingleThread rst = new(r go);
sS loaded;

p-subst {
  autoRestart(5);
  showFrame(northAndCenterWithMargins(
    fontSize(15, centerComboBox(tf = standardFunctionComboBox())),
    jscroll_dynamicvstack(stack = dynamicVStack())));
  onChange(tf, rstTrigger(rst));
}

svoid go {
  S s = getTextTrim(tf);
  if (eq(loaded, s)) ret;
  loaded = s;
  stack.clearComponents();
  for (S f : ll(f iPanel_standardFunctionSourceCode, f iPanel_renderSafeFunction, f identifierSafetyEditPanel)) pcall {
    int n = maxNumberOfFunctionArguments(f);
    O[] args = toObjectArray(takeFirst(n, ll(s, r { loaded = null; rst.trigger() })));
    JComponent c = (JComponent) callF(f, args);
    if (c != null) stack.addComponent(jsection(f, c));
  }
}

Began life as a copy of #1015738