+local min, max = math.min, math.max
+
+-- 和文文字の位置補正(横)
+local function capsule_glyph_yoko(p, met, char_data, head, dir)
+ if not char_data then return node_next(p), head, p end
+ fshift.down = char_data.down; fshift.left = char_data.left
+ fshift = call_callback("luatexja.set_width", fshift, met, char_data)
+ local kbl = has_attr(p, attr_ykblshift) or 0
+ --
+ -- f*: whd specified in JFM
+ local fwidth, pwidth = char_data.width, getfield(p, 'width')
+ fwidth = fwidth or pwidth
+ local fheight, pheight = char_data.height, getfield(p, 'height')
+ fheight = fheight or pheight
+ local fdepth, pdepth = char_data.depth,getfield(p, 'depth')
+ fdepth = fdepth or pdepth
+ if pwidth==fwidth then
+ -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
+ -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
+ local ht_diff = fheight + fshift.down - pheight
+ local dp_diff = fdepth + kbl - pdepth - min(kbl + fshift.down, 0)
+ if ht_diff == 0 and dp_diff ==0 then -- offset only
+ set_attr(p, attr_icflag, PROCESSED)
+ setfield(p, 'xoffset', getfield(p, 'xoffset') - fshift.left)
+ setfield(p, 'yoffset', getfield(p, 'yoffset') - kbl - fshift.down)
+ return node_next(p), head, p
+ elseif ht_diff >= 0 and dp_diff >=0 then -- rule
+ local box = node_new(id_rule)
+ setfield(p, 'yoffset', getfield(p, 'yoffset') - kbl - fshift.down)
+ setfield(box, 'width', 0)
+ setfield(box, 'height', fheight - kbl)
+ setfield(box, 'depth', fdepth + kbl)
+ setfield(box, 'dir', dir)
+ set_attr(box, attr_icflag, PACKED)
+ --set_attr(p, attr_icflag, PACKED)
+ head = p and node_insert_before(head, p, box)
+ or node_insert_after(head, node_tail(head), box)
+ return node_next(p), head, p, box
+ end
+ end
+
+ local q
+ head, q = node_remove(head, p)
+ setfield(p, 'yoffset', getfield(p, 'yoffset') -fshift.down);
+ setfield(p, 'next', nil)
+ 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', kbl)
+ setfield(box, 'dir', dir)
+ 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_yoko = capsule_glyph_yoko
+
+-- 和文文字の位置補正(縦)
+local function capsule_glyph_tate(p, met, char_data, head, dir)
+ if not char_data then return node_next(p), head end
+ local ascent, descent = met.ascent, met.descent
+ local fwidth, pwidth = char_data.width
+ do
+ local pf = getfont(p)
+ local pc = getchar(p)
+ setfield(p, 'char', pc)
+ pwidth = ltjf_font_extra_info[pf] and ltjf_font_extra_info[pf][pc]
+ and ltjf_font_extra_info[pf][pc].vwidth
+ and ltjf_font_extra_info[pf][pc].vwidth * met.size or (ascent+descent)
+ pwidth = pwidth + (met.v_advance[pc] or 0)
+ ascent = met.v_origin[pc] and ascent - met.v_origin[pc] or ascent
+ end
+ fwidth = fwidth or pwidth
+ fshift.down = char_data.down; fshift.left = char_data.left
+ fshift = call_callback("luatexja.set_width", fshift, met, char_data)
+ local fheight = char_data.height or 0
+ local fdepth = char_data.depth or 0
+ 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, char_data)
+ if not char_data then return nil end
+ local fwidth, pwidth = char_data.width, getfield(p, 'width')