4 luatexbase.provides_module({
5 name = 'luatexja.stack',
7 description = 'LuaTeX-ja stack system',
9 module('luatexja.stack', package.seeall)
10 local err, warn, info, log = luatexbase.errwarinf(_NAME)
12 luatexja.load_module('base'); local ltjb = luatexja.base
14 --------------------------------------------------------------------------------
15 -- stack table (obeys TeX's grouping)
16 --------------------------------------------------------------------------------
17 local node_new = node.new
18 local id_whatsit = node.id('whatsit')
19 local sid_user = node.subtype('user_defined')
20 local STCK = luatexja.userid_table.STCK
21 local fastcopy = table.fastcopy
22 local setcount = tex.setcount
23 local scan_int, scan_keyword = token.scan_int, token.scan_keyword
26 charprop_stack_table={};
27 local charprop_stack_table = charprop_stack_table
28 charprop_stack_table[0]={}
31 function get_stack_level()
32 local i = tex.getcount('ltj@@stack')
33 local j = tex.currentgrouplevel
34 if j > tex.getcount('ltj@@group@level') then
35 i = i+1 -- new stack level
36 local gd = tex.globaldefs
37 if gd~=0 then tex.globaldefs = 0 end
38 -- 'tex.globaldefs = 0' is local even if \globaldefs > 0.
39 setcount('ltj@@group@level', j)
40 for k,v in pairs(charprop_stack_table) do -- clear the stack above i
41 if k>=i then charprop_stack_table[k]=nil end
43 charprop_stack_table[i] = fastcopy(charprop_stack_table[i-1])
44 setcount('ltj@@stack', i)
45 if gd~=0 then tex.globaldefs = gd end
46 if tex.nest[tex.nest.ptr].mode == -hmode then -- rest. hmode のみ
47 local g = node_new(id_whatsit, sid_user)
48 g.user_id=STCK; g.type=100; g.value=j; node.write(g)
54 function set_stack_table(m, p)
55 local i = get_stack_level()
56 charprop_stack_table[i][m] = p
57 if luatexja.isglobal=='global' then
58 for j,v in pairs(charprop_stack_table) do
59 charprop_stack_table[j][m] = p
63 local set_stack_table = set_stack_table
66 function 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 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 function set_stack_skip(m,sp)
95 local i = get_stack_level()
96 if not sp then return end
97 if not charprop_stack_table[i][m] then
98 charprop_stack_table[i][m] = {}
100 charprop_stack_table[i][m].width = sp.width
101 charprop_stack_table[i][m].stretch = sp.stretch
102 charprop_stack_table[i][m].shrink = sp.shrink
103 charprop_stack_table[i][m].stretch_order = sp.stretch_order
104 charprop_stack_table[i][m].shrink_order = sp.shrink_order
105 if luatexja.isglobal=='global' then
106 for j,v in pairs(charprop_stack_table) do
107 if not charprop_stack_table[j][m] then charprop_stack_table[j][m] = {} end
108 charprop_stack_table[j][m].width = sp.width
109 charprop_stack_table[j][m].stretch = sp.stretch
110 charprop_stack_table[j][m].shrink = sp.shrink
111 charprop_stack_table[j][m].stretch_order = sp.stretch_order
112 charprop_stack_table[j][m].shrink_order = sp.shrink_order
117 -- These three functions are used in ltj-jfmglue.lua.
118 -- list_dir and orig_char_table are used in other lua files.
120 list_dir = nil -- dummy
121 table_current_stack = nil -- dummy
122 function report_stack_level(bsl)
123 table_current_stack = charprop_stack_table[bsl]
126 function fast_get_stack_skip(m)
127 return table_current_stack[m]
128 or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 }
131 -- For other situations, use the following instead:
132 function get_stack_skip(m, idx)
133 return charprop_stack_table[idx][m]
134 or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 }
136 function get_stack_table(mc, d, idx)
137 local i = charprop_stack_table[idx][mc]