+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)
+ setchar(p, 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 xo, yo = getoffsets(p)
+ local y_shift = xo + (has_attr(p,attr_tkblshift) or 0)
+ local q
+ head, q = node_remove(head, p)
+ local box = node_new(id_hlist)
+ setwhd(box, fwidth, fheight, fdepth)
+ setfield(box, 'shift', y_shift)
+ setdir(box, dir)
+
+ setoffsets(p, -fshift.down,
+ yo -(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, 1); setfield(k2, 'kern', pwnh)
+ local k3 = node_new(id_kern, 1); setfield(k3, 'kern', -getfield(p, 'width')-pwnh)
+ local wr = node_new(id_whatsit, sid_restore)
+ setfield(box, 'head', ws)
+ setnext(ws, wm); setnext(wm, k2);
+ setnext(k2, p); setnext(p, k3);
+ setnext(k3, 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')
+ 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, fdepth = char_data.height, char_data.depth
+ local y_shift
+ = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
+ 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, fwidth, fheight, fdepth)
+ setfield(box, 'head', p)
+ setfield(box, 'shift', y_shift)
+ setdir(box, tex.mathdir)
+ set_attr(box, attr_icflag, PACKED)
+ return box
+end
+luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
+
+-- 数式の位置補正
+function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
+ for p in node_traverse(head) do
+ local pid = getid(p)
+ if p==last then
+ return
+ elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
+ if pid==id_hlist or pid==id_vlist then
+ setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
+ elseif pid==id_rule then
+ local v = has_attr(p,attr_ablshift) or 0
+ setfield(p, 'height', getfield(p, 'height')-v)
+ setfield(p, 'depth', getdepth(p)+v)
+ set_attr(p, attr_icflag, PROCESSED)
+ elseif pid==id_glyph then
+ -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
+ -- (see conv_jchar_to_hbox_A in ltj-math.lua)
+ setfield(p, 'yoffset',
+ getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))