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srecord noeq JGazelleVScriptRunner(SimpleLiveValue<S> lvScript) {
  GazelleVScript parsedScript;
  O result;
  SingleComponentPanel scpScriptResult = singleComponentPanel();
  new WeakVar<ImageSurface> isScriptResult;

  JComponent scriptAndResultPanel() {
    ret northAndCenter(
      scriptInputField(),
      scpScriptResult = singleComponentPanel()
    );
  }
  
  JComponent scriptInputField() {
    ret withMargin(withLabel("Gazelle V Script:", jLiveTextField(lvScript)));
  }
  
  void showScriptOutput {
    //print(result := className(result));
    if (result cast BWImage) {
      var c = scpScriptResult.getComponent();
      if (isShowing(isScriptResult!)) {
        isScriptResult->setImage(result);
      } else {
        var is = stdImageSurface();
        is.setImage(result);
        scpScriptResult.set(jscroll_centered(is));
        isScriptResult.set(is);
      }
    } else
      scpScriptResult.set(jcenteredlabel(shorten(1000, str(result))));
  }
  
  ImageSurface stdImageSurface() {
    ret pixelatedImageSurface().setAutoZoomToDisplay(true).repaintInThread(false);
  }
  
  void parse {
    parsedScript = new GazelleVScript(lvScript!);
  }
  
  void runOn(IBWIntegralImage ii) {
    var run = parsedScript.new Run();
    run.setIntegralImage(ii);
    run.run();
    result = run.result();
  }
}