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
25 charprop_stack_table={};
26 local charprop_stack_table = charprop_stack_table
27 charprop_stack_table[0]={}
30 function get_stack_level()
31 local i = tex.getcount('ltj@@stack')
32 local j = tex.currentgrouplevel
33 if j > tex.getcount('ltj@@group@level') then
34 i = i+1 -- new stack level
35 local gd = tex.globaldefs
36 if gd~=0 then tex.globaldefs = 0 end
37 -- 'tex.globaldefs = 0' is local even if \globaldefs > 0.
38 setcount('ltj@@group@level', j)
39 for k,v in pairs(charprop_stack_table) do -- clear the stack above i
40 if k>=i then charprop_stack_table[k]=nil end
42 charprop_stack_table[i] = fastcopy(charprop_stack_table[i-1])
43 setcount('ltj@@stack', i)
44 if gd~=0 then tex.globaldefs = gd end
45 if tex.nest[tex.nest.ptr].mode == -hmode then -- rest. hmode のみ
46 local g = node_new(id_whatsit, sid_user)
47 g.user_id=STCK; g.type=100; g.value=j; node.write(g)
53 function set_stack_table(m, p)
54 local i = get_stack_level()
55 charprop_stack_table[i][m] = p
56 if luatexja.isglobal=='global' then
57 for j,v in pairs(charprop_stack_table) do
58 charprop_stack_table[j][m] = p
62 local set_stack_table = set_stack_table
65 function set_stack_perchar(m,c,p,lb,ub)
66 if type(p)~='number' or p<lb or p>ub then
67 ltjb.package_error('luatexja',
68 "invalid code (".. tostring(p) .. ")",
69 "The code should in the range "..tostring(lb) .. '..' ..
70 tostring(ub) .. ".\n" ..
71 "I'm going to use 0 instead of that illegal code value.")
74 set_stack_table(m+ltjb.in_unicode(c, true), p)
78 function set_stack_font(m,c,p)
79 if type(c)~='number' or c<0 or c>255 then
80 ltjb.package_error('luatexja',
81 "invalid family number (".. tostring(c) .. ")",
82 "The family number should in the range 0 .. 255.\n" ..
83 "I'm going to use 0 instead of that illegal family number.")
86 set_stack_table(m+c, p)
90 function set_stack_skip(m,sp)
91 local i = get_stack_level()
92 if not sp then return end
93 if not charprop_stack_table[i][m] then
94 charprop_stack_table[i][m] = {}
96 charprop_stack_table[i][m].width = sp.width
97 charprop_stack_table[i][m].stretch = sp.stretch
98 charprop_stack_table[i][m].shrink = sp.shrink
99 charprop_stack_table[i][m].stretch_order = sp.stretch_order
100 charprop_stack_table[i][m].shrink_order = sp.shrink_order
101 if luatexja.isglobal=='global' then
102 for j,v in pairs(charprop_stack_table) do
103 if not charprop_stack_table[j][m] then charprop_stack_table[j][m] = {} end
104 charprop_stack_table[j][m].width = sp.width
105 charprop_stack_table[j][m].stretch = sp.stretch
106 charprop_stack_table[j][m].shrink = sp.shrink
107 charprop_stack_table[j][m].stretch_order = sp.stretch_order
108 charprop_stack_table[j][m].shrink_order = sp.shrink_order
113 -- These three functions are used in ltj-jfmglue.lua.
114 -- list_dir and orig_char_table are used in other lua files.
116 list_dir = nil -- dummy
117 table_current_stack = nil -- dummy
118 function report_stack_level(bsl)
119 table_current_stack = charprop_stack_table[bsl]
122 function fast_get_stack_skip(m)
123 return table_current_stack[m]
124 or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 }
127 -- For other situations, use the following instead:
128 function get_stack_skip(m, idx)
129 return charprop_stack_table[idx][m]
130 or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 }
132 function get_stack_table(mc, d, idx)
133 local i = charprop_stack_table[idx][mc]