4 luatexbase.provides_module({
5 name = 'luatexja.stack',
7 description = 'LuaTeX-ja stack system',
10 local ltjs=luatexja.stack
11 luatexja.load_module 'base'; local ltjb = luatexja.base
13 --------------------------------------------------------------------------------
14 -- stack table (obeys TeX's grouping)
15 --------------------------------------------------------------------------------
16 local node_new = node.new
17 local id_whatsit = node.id 'whatsit'
18 local sid_user = node.subtype 'user_defined'
19 local STCK = luatexja.userid_table.STCK
20 local fastcopy = table.fastcopy
21 local setcount, getcount = tex.setcount, tex.getcount
22 local scan_int, scan_keyword = token.scan_int, token.scan_keyword
23 local getnest = tex.getnest
24 local cnt_stack = luatexbase.registernumber 'ltj@@stack'
25 local cnt_grplvl = luatexbase.registernumber 'ltj@@group@level'
26 ltjs.hmode = 0 -- dummy
28 local charprop_stack_table={}
29 ltjs.charprop_stack_table = charprop_stack_table
30 charprop_stack_table[0]={}
32 local function get_stack_level()
33 local i = getcount(cnt_stack)
34 local j = tex.currentgrouplevel
35 if j > getcount(cnt_grplvl) then
36 i = i+1 -- new stack level
37 local gd = tex.globaldefs
38 if gd~=0 then tex.globaldefs = 0 end
39 -- 'tex.globaldefs = 0' is local even if \globaldefs > 0.
40 setcount(cnt_grplvl, j)
41 for k,v in pairs(charprop_stack_table) do -- clear the stack above i
42 if k>=i then charprop_stack_table[k]=nil end
44 charprop_stack_table[i] = fastcopy(charprop_stack_table[i-1])
45 setcount(cnt_stack, i)
46 if gd~=0 then tex.globaldefs = gd end
47 if getnest().mode == -ltjs.hmode then -- rest. hmode のみ
48 local g = node_new(id_whatsit, sid_user)
49 g.user_id=STCK; g.type=100; g.value=j; node.write(g)
54 ltjs.get_stack_level = get_stack_level
56 local function set_stack_table(m, p)
57 local i = get_stack_level()
58 charprop_stack_table[i][m] = p
59 if luatexja.isglobal=='global' then
60 for j,v in pairs(charprop_stack_table) do v[m] = p end
63 ltjs.set_stack_table = set_stack_table
66 function ltjs.set_stack_perchar(m,lb,ub, getter)
69 local p = tonumber((getter or scan_int)())
71 ltjb.package_error('luatexja',
72 "invalid code (".. tostring(p) .. ")",
73 "The code should in the range "..tostring(lb) .. '..' ..
74 tostring(ub) .. ".\n" ..
75 "I'm going to use 0 instead of that illegal code value.")
78 set_stack_table(m+ltjb.in_unicode(c, true), p)
82 function ltjs.set_stack_font(m,c,p)
83 if type(c)~='number' or c<0 or c>255 then
84 ltjb.package_error('luatexja',
85 "invalid family number (".. tostring(c) .. ")",
86 "The family number should in the range 0 .. 255.\n" ..
87 "I'm going to use 0 instead of that illegal family number.")
90 set_stack_table(m+c, p)
94 local getglue = node.getglue
95 function ltjs.set_stack_skip(m,sp)
96 local i = get_stack_level()
97 if not sp then return end
98 local w,st,sh,sto,sho = getglue(sp)
99 if charprop_stack_table[i][m] then
100 local c = charprop_stack_table[i][m]
101 c[1], c[2], c[3], c[4], c[5] = w, st, sh, sto, sho
103 charprop_stack_table[i][m] = { w,st,sh,sto,sho }
105 if luatexja.isglobal=='global' then
106 for j,v in pairs(charprop_stack_table) do
107 if not v[m] then v[m] = { true,true,true,true,true } end
109 c[1], c[2], c[3], c[4], c[5] = w, st, sh, sto, sho
114 -- These three functions are used in ltj-jfmglue.lua.
115 -- list_dir and orig_char_table are used in other lua files.
116 local orig_char_table = {}
117 ltjs.orig_char_table = orig_char_table
118 ltjs.list_dir = nil -- dummy
119 ltjs.table_current_stack = nil -- dummy
120 local dummy_skip_table = { 0,0,0,0,0 }
121 function ltjs.report_stack_level(bsl)
122 ltjs.table_current_stack = charprop_stack_table[bsl]
125 function ltjs.fast_get_stack_skip(m)
126 return ltjs.table_current_stack[m] or dummy_skip_table
129 -- For other situations, use the following instead:
130 function ltjs.get_stack_skip(m, idx)
131 return charprop_stack_table[idx][m] or dummy_skip_table
133 function ltjs.get_stack_table(mc, d, idx)
134 return charprop_stack_table[idx][mc] or d