!7

sclass SFAutoComplete > DynObjectTable<S> {
  transient WeakReference<JTextComponent> tc;
  
  start {
    doEveryAndNow(2000, r {
      if (!isVisible()) ret;
      JTextComponent c = optCast(JTextComponent, getFocusOwner());
      if (c == null) ret;
      tc = weakRef(c);
      int i = getCaretPosition(c);
      S word = lastWord(takeFirst(getText(c), i));
      setData(takeFirst(10, prefixSubSet(standardFunctionNames_sorted(), word));
    });
  }
  
  void onDoubleClick(S s) {
    JTextComponent c = getWeakRef(tc);
    if (c != null) {
      int i = getCaretPosition(c);
      Document doc = c.getDocument();
      S word = lastWord(takeFirst(getText(c), i));
      doc.insertString(i, dropPrefix(word, s), null);
    }
  }
}