--
--- luatexja/math.lua
+-- luatexja/ltj-math.lua
--
-luatexbase.provides_module({
- name = 'luatexja.math',
- date = '2011/08/14',
- version = '0.1',
- description = 'Handling routines for Japanese characters in math mode',
-})
-module('luatexja.math', package.seeall)
luatexja.load_module('base'); local ltjb = luatexja.base
luatexja.load_module('charrange'); local ltjc = luatexja.charrange
luatexja.load_module('stack'); local ltjs = luatexja.stack
luatexja.load_module('setwidth'); local ltjw = luatexja.setwidth
-local node_new = node.new
-local node_next = node.next
-local node_free = node.free
-local has_attr = node.has_attribute
-local set_attr = node.set_attribute
+local Dnode = node.direct or node
+
+local setfield = (Dnode ~= node) and Dnode.setfield or function(n, i, c) n[i] = c end
+local getfield = (Dnode ~= node) and Dnode.getfield or function(n, i) return n[i] end
+local getid = (Dnode ~= node) and Dnode.getid or function(n) return n.id end
+-- getlist cannot be used for sub_box nodes. Use instead λp. getfield(p, 'head')
+local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
+
+local nullfunc = function(n) return n end
+local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
+local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
+
+local node_traverse = Dnode.traverse
+local node_new = Dnode.new
+local node_next = (Dnode ~= node) and Dnode.getnext or node.next
+local node_free = Dnode.free
+local has_attr = Dnode.has_attribute
+local set_attr = Dnode.set_attribute
+local tex_getcount = tex.getcount
local attr_jchar_class = luatexbase.attributes['ltj@charclass']
local attr_icflag = luatexbase.attributes['ltj@icflag']
local id_simple = node.id('noad')
local id_sub_mlist = node.id('sub_mlist')
-local PROCESSED = 8
+local PROCESSED = luatexja.icflag_table.PROCESSED
local ltjf_font_metric_table = ltjf.font_metric_table
local ltjf_find_char_class = ltjf.find_char_class
-- table of mathematical characters
-is_math_letters = {}
+local is_math_letters = {}
local conv_jchar_to_hbox_A
-- sty : 0 (display or text), 1 (script), >=2 (scriptscript)
local function conv_jchar_to_hbox(head, sty)
- local p = head
- local bhead = head
- while p do
- if p.id == id_simple or p.id == id_accent then
- p.nucleus = conv_jchar_to_hbox_A(p.nucleus, sty)
- p.sub = conv_jchar_to_hbox_A(p.sub, sty + 1)
- p.sup = conv_jchar_to_hbox_A(p.sup, sty + 1)
- elseif p.id == id_choice then
- p.display = conv_jchar_to_hbox(p.display, 0)
- p.text = conv_jchar_to_hbox(p.text, 0)
- p.script = conv_jchar_to_hbox(p.script, 1)
- p.scriptscript = conv_jchar_to_hbox(p.scriptscript, 2)
- elseif p.id == id_frac then
- p.num = conv_jchar_to_hbox_A(p.num, sty + 1)
- p.denom = conv_jchar_to_hbox_A(p.denom, sty + 1)
- elseif p.id == id_radical then
- p.nucleus = conv_jchar_to_hbox_A(p.nucleus, sty)
- p.sub = conv_jchar_to_hbox_A(p.sub, sty + 1)
- p.sup = conv_jchar_to_hbox_A(p.sup, sty + 1)
- if p.degree then
- p.degree = conv_jchar_to_hbox_A(p.degree, sty + 1)
+ for p in node_traverse(head) do
+ local pid = getid(p)
+ if pid == id_simple or pid == id_accent 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))
+ 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 p.id == id_style then
- if p.style == "display'" or p.style == 'display'
- or p.style == "text'" or p.style == 'text' then
+ 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 p.style == "script'" or p.style == 'script' then
+ elseif ps == "script'" or ps == 'script' then
sty = 1
else sty = 2
end
end
- p = node.next(p)
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
- elseif p.id == id_sub_mlist then
- if p.head then
- p.head = conv_jchar_to_hbox(p.head, sty)
- end
- elseif p.id == id_mchar then
- local fam = has_attr(p, attr_jfam) or -1
- if (not is_math_letters[p.char]) and ltjc.is_ucs_in_japanese_char(p) and fam>=0 then
- local mode = 'mjss'
- if sty == 0 then mode = 'mjtext'
- elseif sty == 1 then mode = 'mjscr'
- end
- local f = ltjs.get_penalty_table(mode, fam, -1, tex.getcount('ltj@@stack'))
- if f ~= -1 then
- local q = node_new(id_sub_box)
- local r = node_new(id_glyph); r.next = nil
- r.char = p.char; r.font = f; r.subtype = 256
- set_attr(r, attr_icflag, PROCESSED)
- set_attr(r, attr_yablshift, 0)
- local met = ltjf_font_metric_table[f]
- local class = ltjf_find_char_class(p.char, met)
- set_attr(r, attr_jchar_class, class)
- ltjw.char_data = ltjf.metrics[met.jfm].size_cache[met.size].char_type[class]
- ltjw.head = r; ltjw.capsule_glyph(r, tex.mathdir , true, met, class);
- q.head = ltjw.head; node_free(p); p=q;
- end
+ 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, 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
+ set_attr(getfield(p, 'head'), attr_icflag, PROCESSED)
end
end
return p
luatexbase.add_to_callback('mlist_to_hlist',
function (n, display_type, penalties)
- local head = conv_jchar_to_hbox(n, 0);
+ local head = to_node(conv_jchar_to_hbox(to_direct(n), 0))
head = node.mlist_to_hlist(head, display_type, penalties)
return head
end,'ltj.mlist_to_hlist', 1)
+
+luatexja.math = { is_math_letters = is_math_letters }
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