svoid jTextPane_adjustTextSizeToFillParentHeight(JTextPane pane) {
  jTextPane_adjustTextSizeToFillParentHeight(pane, 100);
}

svoid jTextPane_adjustTextSizeToFillParentHeight(JTextPane pane, int countdown) {
  if (countdown < 1 || pane == null || getParent(pane) == null) ret;
  swing {
    int pref = preferredHeight(pane);
    double ratio = doubleRatio(pane.getParent().getHeight(), pref);
    if (ratio == 1) ret;
    float size = pane.getFont().getSize2D();
    //float newSize = (float) max(1, size*ratio);
    float newSize = ratio > 1 ? size+1 : size-1;
    print("pref=" + pref + ", new font size: " + newSize);
    setFontSize(pane, newSize);
    awtLater(10, r {
      jTextPane_adjustTextSizeToFillParentHeight(pane, countdown-1);
    });
  }
}