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 local gd = tex.globaldefs
27 if gd>0 then tex.globaldefs = 0 end
28 -- 'tex.globaldefs = 0' is local even if \globaldefs > 0.
29 tex.setcount('ltj@@group@level', j)
30 for k,v in pairs(charprop_stack_table) do -- clear the stack above i
31 if k>=i then charprop_stack_table[k]=nil end
33 charprop_stack_table[i] = table.fastcopy(charprop_stack_table[i-1])
34 tex.setcount('ltj@@stack', i)
35 if gd>0 then tex.globaldefs = gd end
36 local g = node_new(id_whatsit, sid_user)
37 g.user_id=30112; g.type=100; g.value=j; node.write(g)
43 function set_stack_table(g,m,c,p,lb,ub)
44 local i = get_stack_level()
46 ltjb.package_error('luatexja',
47 "invalid code (".. p .. ")",
48 {"The code should in the range "..tostring(lb) ..'..'.. tostring(ub) .. ".",
49 "I'm going to use 0 instead of that illegal code value."})
51 elseif c<-1 or c>0x10ffff then
52 ltjb.package_error('luatexja',
53 'bad character code (' .. c .. ')',
54 {'A character number must be between -1 and 0x10ffff.',
55 "(-1 is used for denoting `math boundary')",
56 'So I changed this one to zero.'})
58 elseif not charprop_stack_table[i][c] then
59 charprop_stack_table[i][c] = {}
61 charprop_stack_table[i][c][m] = p
63 for j,v in pairs(charprop_stack_table) do
64 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
65 charprop_stack_table[j][c][m] = p
71 function set_stack_font(g,m,c,p)
72 local i = get_stack_level()
74 ltjb.package_error('luatexja',
75 "invalid family number (".. p .. ")",
76 {"The family number should in the range 0 .. 255.",
77 "I'm going to use 0 instead of that illegal family number."})
79 elseif not charprop_stack_table[i][c] then
80 charprop_stack_table[i][c] = {}
82 charprop_stack_table[i][c][m] = p
84 for j,v in pairs(charprop_stack_table) do
85 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
86 charprop_stack_table[j][c][m] = p
91 -- EXT: store \ltj@tempskipa
92 function set_stack_skip(g,c,sp)
93 local i = get_stack_level()
94 if not sp then return end
95 if not charprop_stack_table[i][c] then
96 charprop_stack_table[i][c] = {}
98 charprop_stack_table[i][c].width = sp.width
99 charprop_stack_table[i][c].stretch = sp.stretch
100 charprop_stack_table[i][c].shrink = sp.shrink
101 charprop_stack_table[i][c].stretch_order = sp.stretch_order
102 charprop_stack_table[i][c].shrink_order = sp.shrink_order
104 for j,v in pairs(charprop_stack_table) do
105 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
106 charprop_stack_table[j][c].width = sp.width
107 charprop_stack_table[j][c].stretch = sp.stretch
108 charprop_stack_table[j][c].shrink = sp.shrink
109 charprop_stack_table[j][c].stretch_order = sp.stretch_order
110 charprop_stack_table[j][c].shrink_order = sp.shrink_order
115 -- mode: nil iff it is called in callbacks
116 function get_skip_table(m, idx)
117 local i = charprop_stack_table[idx][m]
118 return i or { width = 0, stretch = 0, shrink = 0,
119 stretch_order = 0, shrink_order = 0 }
122 function get_penalty_table(m,c,d, idx)
123 local i = charprop_stack_table[idx][c]