private Button getNonBreakingLineButton() {
    Button ret =
        new Button(
            "", new ImageView(new Image("file:icons/nonbreakline.png", 24, 24, false, true)));
    Utils.setToolbarButtonStyle(ret);
    ret.setTooltip(new Tooltip(LabelGrabber.INSTANCE.getLabel("nonbreak.tooltip")));
    ret.setOnAction(
        (event) -> {
          int caretPos = lyricsArea.getArea().getCaretPosition();
          String[] parts = lyricsArea.getText().split("\n");
          int lineIndex = lineFromPos(lyricsArea.getText(), caretPos);
          String line = parts[lineIndex];
          if (line.trim().isEmpty()) {
            Platform.runLater(
                new Runnable() {

                  @Override
                  public void run() {
                    lyricsArea.getArea().replaceText(caretPos, caretPos, "<>");
                    lyricsArea.getArea().refreshStyle();
                  }
                });
          } else {
            int nextLinePos = nextLinePos(lyricsArea.getText(), caretPos);
            if (nextLinePos >= lyricsArea.getText().length()) {
              Platform.runLater(
                  new Runnable() {

                    @Override
                    public void run() {
                      lyricsArea.getArea().replaceText(nextLinePos, nextLinePos, "\n<>\n");
                      lyricsArea.getArea().refreshStyle();
                    }
                  });
            } else {
              Platform.runLater(
                  new Runnable() {

                    @Override
                    public void run() {
                      lyricsArea.getArea().replaceText(nextLinePos, nextLinePos, "<>\n");
                      lyricsArea.getArea().refreshStyle();
                    }
                  });
            }
          }
        });
    return ret;
  }
 /**
  * Get the lyrics field.
  *
  * <p>
  *
  * @return the lyrics field.
  */
 public LyricsTextArea getLyricsField() {
   return lyricsArea.getArea();
 }