4 luatexbase.provides_module({
5 name = 'luatexja.stack',
8 description = 'LuaTeX-ja stack system',
10 module('luatexja.stack', package.seeall)
11 local err, warn, info, log = luatexbase.errwarinf(_NAME)
13 require('luatexja.base'); local ltjb = luatexja.base
15 local node_new = node.new
16 local id_whatsit = node.id('whatsit')
17 local sid_user = node.subtype('user_defined')
19 local charprop_stack_table={}; charprop_stack_table[0]={}
21 function get_stack_level()
22 local i = tex.getcount('ltj@@stack')
23 local j = tex.currentgrouplevel
24 if j > tex.getcount('ltj@@group@level') then
25 i = i+1 -- new stack level
26 tex.setcount('ltj@@group@level', j)
27 for k,v in pairs(charprop_stack_table) do -- clear the stack above i
28 if k>=i then charprop_stack_table[k]=nil end
30 charprop_stack_table[i] = table.fastcopy(charprop_stack_table[i-1])
31 tex.setcount('ltj@@stack', i)
32 local g = node_new(id_whatsit, sid_user)
33 g.user_id=30112; g.type=100; g.value=j; node.write(g)
39 function set_stack_table(g,m,c,p,lb,ub)
40 local i = get_stack_level()
42 ltjb.package_error('luatexja',
43 "invalid code (".. p .. ")",
44 {"The code should in the range "..tostring(lb) ..'..'.. tostring(ub) .. ".",
45 "I'm going to use 0 instead of that illegal code value."})
47 elseif c<-1 or c>0x10ffff then
48 ltjb.package_error('luatexja',
49 'bad character code (' .. c .. ')',
50 {'A character number must be between -1 and 0x10ffff.',
51 "(-1 is used for denoting `math boundary')",
52 'So I changed this one to zero.'})
54 elseif not charprop_stack_table[i][c] then
55 charprop_stack_table[i][c] = {}
57 charprop_stack_table[i][c][m] = p
59 for j,v in pairs(charprop_stack_table) do
60 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
61 charprop_stack_table[j][c][m] = p
67 function set_stack_font(g,m,c,p)
68 local i = get_stack_level()
70 ltjb.package_error('luatexja',
71 "invalid family number (".. p .. ")",
72 {"The family number should in the range 0 .. 255.",
73 "I'm going to use 0 instead of that illegal family number."})
75 elseif not charprop_stack_table[i][c] then
76 charprop_stack_table[i][c] = {}
78 charprop_stack_table[i][c][m] = p
80 for j,v in pairs(charprop_stack_table) do
81 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
82 charprop_stack_table[j][c][m] = p
87 -- EXT: store \ltj@tempskipa
88 function set_stack_skip(g,c,sp)
89 local i = get_stack_level()
90 if not sp then return end
91 if not charprop_stack_table[i][c] then
92 charprop_stack_table[i][c] = {}
94 charprop_stack_table[i][c].width = sp.width
95 charprop_stack_table[i][c].stretch = sp.stretch
96 charprop_stack_table[i][c].shrink = sp.shrink
97 charprop_stack_table[i][c].stretch_order = sp.stretch_order
98 charprop_stack_table[i][c].shrink_order = sp.shrink_order
100 for j,v in pairs(charprop_stack_table) do
101 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
102 charprop_stack_table[j][c].width = sp.width
103 charprop_stack_table[j][c].stretch = sp.stretch
104 charprop_stack_table[j][c].shrink = sp.shrink
105 charprop_stack_table[j][c].stretch_order = sp.stretch_order
106 charprop_stack_table[j][c].shrink_order = sp.shrink_order
111 -- mode: nil iff it is called in callbacks
112 function get_skip_table(m, idx)
113 local i = charprop_stack_table[idx][m]
114 return i or { width = 0, stretch = 0, shrink = 0,
115 stretch_order = 0, shrink_order = 0 }
118 function get_penalty_table(m,c,d, idx)
119 local i = charprop_stack_table[idx][c]