-- -- ltj-math.lua -- luatexja.load_module('base'); local ltjb = luatexja.base luatexja.load_module('direction'); local ltjd = luatexja.direction luatexja.load_module('charrange'); local ltjc = luatexja.charrange luatexja.load_module('jfont'); local ltjf = luatexja.jfont luatexja.load_module('stack'); local ltjs = luatexja.stack luatexja.load_module('setwidth'); local ltjw = luatexja.setwidth local setfield = node.direct.setfield local getfield = node.direct.getfield local getid = node.direct.getid local getsubtype = node.direct.getsubtype local getlist = node.direct.getlist -- getlist cannot be used for sub_box nodes. Use instead λp. getfield(p, 'head') local getchar = node.direct.getchar local to_node = node.direct.tonode local to_direct = node.direct.todirect local node_traverse = node.direct.traverse local node_new = node.direct.new local node_next = node.direct.getnext local node_remove = node.direct.remove local node_free = node.direct.free local has_attr = node.direct.has_attribute local set_attr = node.direct.set_attribute local tex_getcount = tex.getcount local attr_jchar_class = luatexbase.attributes['ltj@charclass'] local attr_dir = luatexbase.attributes['ltj@dir'] local attr_icflag = luatexbase.attributes['ltj@icflag'] local attr_curjfnt = luatexbase.attributes['ltj@curjfnt'] local attr_jfam = luatexbase.attributes['jfam'] local attr_yablshift = luatexbase.attributes['ltj@yablshift'] local id_glyph = node.id('glyph') local id_hlist = node.id('hlist') local id_vlist = node.id('vlist') local id_mchar = node.id('math_char') local id_sub_box = node.id('sub_box') local id_radical = node.id('radical') local id_choice = node.id('choice') local id_accent = node.id('accent') local id_style = node.id('style') local id_frac = node.id('fraction') local id_simple = node.id('noad') local id_sub_mlist = node.id('sub_mlist') local id_whatsit = node.id('whatsit') local sid_user = node.subtype('user_defined') local DIR = luatexja.userid_table.DIR local dir_node_auto = luatexja.dir_table.dir_node_auto local PROCESSED = luatexja.icflag_table.PROCESSED local ltjf_font_metric_table = ltjf.font_metric_table local ltjf_find_char_class = ltjf.find_char_class local ltjd_get_dir_count = ltjd.get_dir_count local ltjd_make_dir_whatsit = ltjd.make_dir_whatsit -- table of mathematical characters local is_math_letters = {} local list_dir -- vcenter noad は軸に揃えるため,欧文ベースライン補正がかかる local function conv_vcenter(sb) local h = getfield(sb, 'head');local hd = getlist(h) if getid(hd)==id_whatsit and getsubtype(hd)==sid_user and getfield(hd, 'user_id')==DIR then local d = node_next(hd) if getid(d)==id_vlist and has_attr(d, attr_dir)>=dir_node_auto then node_free(hd); setfield(h, 'head', nil); node_free(h) setfield(sb, 'head', d); set_attr(d, attr_icflag, 0) end end return sb end local conv_jchar_to_hbox_A -- sty : 0 (display or text), 1 (script), >=2 (scriptscript) local function conv_jchar_to_hbox(head, sty) for p in node_traverse(head) do local pid = getid(p) if pid == id_simple or pid == id_accent then if getsubtype(p)==12 then conv_vcenter(getfield(p, 'nucleus')) else setfield(p, 'nucleus', conv_jchar_to_hbox_A(getfield(p, 'nucleus'), sty)) end setfield(p, 'sub', conv_jchar_to_hbox_A(getfield(p, 'sub'), sty+1)) setfield(p, 'sup', conv_jchar_to_hbox_A(getfield(p, 'sup'), sty+1)) elseif pid == id_choice then setfield(p, 'display', conv_jchar_to_hbox_A(getfield(p, 'display'), 0)) setfield(p, 'text', conv_jchar_to_hbox_A(getfield(p, 'text'), 0)) setfield(p, 'script', conv_jchar_to_hbox_A(getfield(p, 'script'), 1)) setfield(p, 'scriptscript', conv_jchar_to_hbox_A(getfield(p, 'scriptscript'), 2)) elseif pid == id_frac then setfield(p, 'num', conv_jchar_to_hbox_A(getfield(p, 'num'), sty+1)) setfield(p, 'denom', conv_jchar_to_hbox_A(getfield(p, 'denom'), sty+1)) elseif pid == id_radical then setfield(p, 'nucleus', conv_jchar_to_hbox_A(getfield(p, 'nucleus'), sty)) setfield(p, 'sub', conv_jchar_to_hbox_A(getfield(p, 'sub'), sty+1)) setfield(p, 'sup', conv_jchar_to_hbox_A(getfield(p, 'sup'), sty+1)) if getfield(p, 'degree') then setfield(p, 'degree', conv_jchar_to_hbox_A(getfield(p, 'degree'), sty + 1)) end elseif pid == id_style then local ps = getfield(p, 'style') if ps == "display'" or ps == 'display' or ps == "text'" or ps == 'text' then sty = 0 elseif ps == "script'" or ps == 'script' then sty = 1 else sty = 2 end end end return head end local MJT = luatexja.stack_table_index.MJT local MJS = luatexja.stack_table_index.MJS local MJSS = luatexja.stack_table_index.MJSS local capsule_glyph_math = ltjw.capsule_glyph_math local is_ucs_in_japanese_char = ltjc.is_ucs_in_japanese_char_direct conv_jchar_to_hbox_A = function (p, sty) if not p then return nil else local pid = getid(p) if pid == id_sub_mlist then if getfield(p, 'head') then setfield(p, 'head', conv_jchar_to_hbox(getfield(p, 'head'), sty)) end elseif pid == id_mchar then local fam = has_attr(p, attr_jfam) or -1 local pc = getchar(p) if (not is_math_letters[pc]) and is_ucs_in_japanese_char(p) and fam>=0 then local f = ltjs.get_stack_table(MJT + 0x100 * sty + fam, -1, tex_getcount('ltj@@stack')) if f ~= -1 then local q = node_new(id_sub_box) local r = node_new(id_glyph); setfield(r, 'next', nil) setfield(r, 'char', pc); setfield(r, 'font', f); setfield(r, 'subtype', 256) local k = has_attr(r,attr_ykblshift) or 0 set_attr(r, attr_ykblshift, 0) -- ltj-setwidth 内で実際の位置補正はおこなうので,補正量を退避 local met = ltjf_font_metric_table[f] r = capsule_glyph_math(r, met, met.char_type[ltjf_find_char_class(pc, met)]); setfield(q, 'head', r); node_free(p); p=q; set_attr(r, attr_yablshift, k) end end elseif pid == id_sub_box and getfield(p, 'head') then -- \hbox で直に与えられた内容は上下位置を補正する必要はない local h = getfield(p, 'head') h = ltjd_make_dir_whatsit(h, h, list_dir, 'math') setfield(p, 'head', h) set_attr(h, attr_icflag, PROCESSED) end end return p end do local function mlist_callback_ltja(n) local n = to_direct(n); list_dir = ltjd_get_dir_count() if getid(n)==id_whatsit and getsubtype(n)==sid_user and getfield(n, 'user_id') == DIR then local old_n = n; n = node_remove(n, n) node_free(old_n); if not n then return nil end end return to_node(conv_jchar_to_hbox(n, 0)) end -- LaTeX 2020-02-02 seems to have pre_mlist_to_hlist_filter callback if luatexbase.callbacktypes['pre_mlist_to_hlist_filter'] then luatexbase.add_to_callback('pre_mlist_to_hlist_filter', mlist_callback_ltja, 'ltj.mlist_to_hlist_pre', 1) else local mlist_to_hlist = node.mlist_to_hlist luatexbase.add_to_callback('mlist_to_hlist', function (n, display_type, penalties) return mlist_to_hlist(mlist_callback_ltja(n),display_type, penalties) end,'ltj.mlist_to_hlist', 1) end end luatexja.math = { is_math_letters = is_math_letters }