@Override protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r) {
            if (r == null) {
                r = new SizeRequirements();
            }
            float pref = layoutPool.getPreferredSpan(axis);
            float min = layoutPool.getMinimumSpan(axis);
            // Don't include insets, Box.getXXXSpan will include them.
            r.minimum = (int)min;
            r.preferred = Math.max(r.minimum, (int)pref);
            r.maximum = Integer.MAX_VALUE;
            r.alignment = 0.5f;
            return r;
        }
Forces a line break.

@return View.ForcedBreakWeight
src/cn/ieclipse/smartim/common/WrapHTMLFactory.java