+ fwidth = (fwidth ~= 'prop') and fwidth or pwidth
+ fshift.down = char_data.down; fshift.left = char_data.left
+ fshift = call_callback("luatexja.set_width", fshift, met, class)
+ local fheight, fdepth = char_data.height, char_data.depth
+
+ local y_shift
+ = getfield(p, 'xoffset') + (has_attr(p,attr_tkblshift) or 0)
+ local q
+ head, q = node_remove(head, p)
+ local box = node_new(id_hlist)
+ setfield(box, 'width', fwidth)
+ setfield(box, 'height', fheight)
+ setfield(box, 'depth', fdepth)
+ setfield(box, 'shift', y_shift)
+ setfield(box, 'dir', dir)
+
+ setfield(p, 'xoffset', - fshift.down)
+ setfield(p, 'yoffset', getfield(p, 'yoffset') -(ascent
+ + char_data.align*(fwidth-pwidth) - fshift.left) )
+ local ws = node_new(id_whatsit, sid_save)
+ local wm = node_new(id_whatsit, sid_matrix)
+ setfield(wm, 'data', '0 1 -1 0')
+ local pwnh = -round(0.5*getfield(p, 'width'))
+ local k2 = node_new(id_kern); setfield(k2, 'kern', pwnh)
+ local k3 = node_new(id_kern); setfield(k3, 'kern', -getfield(p, 'width')-pwnh)
+ local wr = node_new(id_whatsit, sid_restore)
+ setfield(box, 'head', ws)
+ setfield(ws, 'next', wm); setfield(wm, 'next', k2);
+ setfield(k2, 'next', p); setfield(p, 'next', k3);
+ setfield(k3, 'next', wr);
+
+ set_attr(box, attr_icflag, PACKED)
+ head = q and node_insert_before(head, q, box)
+ or node_insert_after(head, node_tail(head), box)
+ return q, head, box
+end
+luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
+
+local function capsule_glyph_math(p, met, class)
+ local char_data = met.char_type[class]
+ if not char_data then return nil end
+ local fwidth, pwidth = char_data.width, getfield(p, 'width')
+ fwidth = (fwidth ~= 'prop') and fwidth or pwidth
+ fshift.down = char_data.down; fshift.left = char_data.left
+ fshift = call_callback("luatexja.set_width", fshift, met, class)
+ local fheight, fdepth = char_data.height, char_data.depth
+ local y_shift, ca
+ = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0), char_data.align
+ setfield(p, 'yoffset', -fshift.down)
+ setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
+ local box = node_new(id_hlist);
+ setfield(box, 'width', fwidth)
+ setfield(box, 'height', fheight)
+ setfield(box, 'depth', fdepth)
+ setfield(box, 'head', p)
+ setfield(box, 'shift', y_shift)
+ setfield(box, 'dir', tex.mathdir)
+ set_attr(box, attr_icflag, PACKED)
+ return box