public Box createBox(TeXEnvironment env) {
TeXFont tf = env.getTeXFont();
int style = env.getStyle();
// set base in cramped style
Box b = (base == null ? new StrutBox(0, 0, 0, 0) : base.createBox(env.crampStyle()));
float u = b.getWidth();
float s = 0;
if (base instanceof CharSymbol) s = tf.getSkew(((CharSymbol) base).getCharFont(tf), style);
// retrieve best Char from the accent symbol
Char ch = tf.getChar(accent.getName(), style);
while (tf.hasNextLarger(ch)) {
Char larger = tf.getNextLarger(ch, style);
if (larger.getWidth() <= u) ch = larger;
else break;
}
// calculate delta
float delta = Math.min(b.getHeight(), tf.getXHeight(style, ch.getFontCode()));
// create vertical box
VerticalBox vBox = new VerticalBox();
// accent
Box y;
float italic = ch.getItalic();
if (italic > TeXFormula.PREC) {
y = new HorizontalBox(new CharBox(ch));
y.add(new StrutBox(italic, 0, 0, 0));
} else y = new CharBox(ch);
// if diff > 0, center accent, otherwise center base
float diff = (u - y.getWidth()) / 2;
y.setShift(s + (diff > 0 ? diff : 0));
if (diff < 0) b = new HorizontalBox(b, y.getWidth(), TeXConstants.ALIGN_CENTER);
vBox.add(y);
// kern
vBox.add(new StrutBox(0, -delta, 0, 0));
// base
vBox.add(b);
// set height and depth vertical box
float total = vBox.getHeight() + vBox.getDepth(), d = b.getDepth();
vBox.setDepth(d);
vBox.setHeight(total - d);
return vBox;
}