!7

sclass TextArea extends DynModule {
  S text;
  S globalID = aGlobalID();

  transient EditRecorder recorder;
  transient JTextArea ta;
  transient ReliableSingleThread rstPersistText = rstWithDelay(1000, r persistText);
  
  bool warnOnDelete() { ret nempty(text); }
  
  File logFile() { ret javaxDataDir("Text Area Logs/" + globalID); }
  
  JComponent visualize() {
    ta = typeWriterTextArea(text);
    logQuoted(logFile(), "text: " + text);
    recorder = new EditRecorder(voidfunc(EREvent e) {
      logStructure(logFile(), e);
    });
    recorder.text = text;
    main.onChange(ta, rstPersistText);
    ret jscroll(setOpaqueBackground(Color.white, withMargin(ta)));
  }
  
  void persistText {
    if (ta != null) {
      Pair<S, Int> p = swing(func -> Pair<S, Int> {
        pair(getText(ta), getCaretPosition(ta))
      });
      recorder.update(p.a);
      recorder.updateCaret(p.b);
      print("persistText " + now());
      setField(text := getText(ta));
    }
  }
  
  void unvisualize() {
    persistText();
    ta = null;
  }
  
  void setText(S text) {
    main.setText(ta, text);
  }
}