!7

static double delay = 1.0; // need 1 second hover before showing source code
static JFrame frame;
static new Countdown countdown;
static S snippetToShow;

sclass Countdown {
  java.util.Timer timer;
  
  // stops the countdown and restarts it
  synchronized void start(double delay, O action) {
    stop();
    timer = doLater_daemon(delay, action);
  }
  
  synchronized void stop() {
    cancelTimer(timer);
    timer = null;
  }
}

p-subst-autorestart {
  onLocalMechAppend("Mouse hovers", vf1(f update));
}

svoid update(S s) {
  //infoBox(s);
  bool off = jfind(s, "no longer") >= 0;
  if (off) { print("off"); countdown.stop(); }
  else {
    final TextImageAction tia = jextractSerializedObject(s, TextImageAction);
    if (tia != null && isSnippetID(tia.toolTip))
      countdown.start(delay, r {
        snippetToShow = tia.toolTip;
        fS text = loadSnippet_cached(tia.toolTip);
        if (nempty(text)) swing {
          if (eq(snippetToShow, tia.toolTip))
            frame = showFrame(snippetWithTitle_rev(tia.toolTip), jscroll(withMargin(wordWrapTypeWriterTextArea(text))), frame);
        }
      });
  }
}