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')
18 local hmode = 118 -- in luatexref-t.pdf, this must be 127
20 local charprop_stack_table={}; charprop_stack_table[0]={}
22 function get_stack_level()
23 local i = tex.getcount('ltj@@stack')
24 local j = tex.currentgrouplevel
25 if j > tex.getcount('ltj@@group@level') then
26 i = i+1 -- new stack level
27 local gd = tex.globaldefs
28 if gd>0 then tex.globaldefs = 0 end
29 -- 'tex.globaldefs = 0' is local even if \globaldefs > 0.
30 tex.setcount('ltj@@group@level', j)
31 for k,v in pairs(charprop_stack_table) do -- clear the stack above i
32 if k>=i then charprop_stack_table[k]=nil end
34 charprop_stack_table[i] = table.fastcopy(charprop_stack_table[i-1])
35 tex.setcount('ltj@@stack', i)
36 if gd>0 then tex.globaldefs = gd end
37 if tex.nest[tex.nest.ptr].mode == hmode or
38 tex.nest[tex.nest.ptr].mode == -hmode then
39 local g = node_new(id_whatsit, sid_user)
40 g.user_id=30112; g.type=100; g.value=j; node.write(g)
47 function set_stack_table(g,m,c,p,lb,ub)
48 local i = get_stack_level()
50 ltjb.package_error('luatexja',
51 "invalid code (".. p .. ")",
52 {"The code should in the range "..tostring(lb) ..'..'.. tostring(ub) .. ".",
53 "I'm going to use 0 instead of that illegal code value."})
55 elseif c<-1 or c>0x10ffff then
56 ltjb.package_error('luatexja',
57 'bad character code (' .. c .. ')',
58 {'A character number must be between -1 and 0x10ffff.',
59 "(-1 is used for denoting `math boundary')",
60 'So I changed this one to zero.'})
62 elseif not charprop_stack_table[i][c] then
63 charprop_stack_table[i][c] = {}
65 charprop_stack_table[i][c][m] = p
67 for j,v in pairs(charprop_stack_table) do
68 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
69 charprop_stack_table[j][c][m] = p
75 function set_stack_font(g,m,c,p)
76 local i = get_stack_level()
78 ltjb.package_error('luatexja',
79 "invalid family number (".. p .. ")",
80 {"The family number should in the range 0 .. 255.",
81 "I'm going to use 0 instead of that illegal family number."})
83 elseif not charprop_stack_table[i][c] then
84 charprop_stack_table[i][c] = {}
86 charprop_stack_table[i][c][m] = p
88 for j,v in pairs(charprop_stack_table) do
89 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
90 charprop_stack_table[j][c][m] = p
95 -- EXT: store \ltj@tempskipa
96 function set_stack_skip(g,c,sp)
97 local i = get_stack_level()
98 if not sp then return end
99 if not charprop_stack_table[i][c] then
100 charprop_stack_table[i][c] = {}
102 charprop_stack_table[i][c].width = sp.width
103 charprop_stack_table[i][c].stretch = sp.stretch
104 charprop_stack_table[i][c].shrink = sp.shrink
105 charprop_stack_table[i][c].stretch_order = sp.stretch_order
106 charprop_stack_table[i][c].shrink_order = sp.shrink_order
108 for j,v in pairs(charprop_stack_table) do
109 if not charprop_stack_table[j][c] then charprop_stack_table[j][c] = {} end
110 charprop_stack_table[j][c].width = sp.width
111 charprop_stack_table[j][c].stretch = sp.stretch
112 charprop_stack_table[j][c].shrink = sp.shrink
113 charprop_stack_table[j][c].stretch_order = sp.stretch_order
114 charprop_stack_table[j][c].shrink_order = sp.shrink_order
119 -- mode: nil iff it is called in callbacks
120 function get_skip_table(m, idx)
121 local i = charprop_stack_table[idx][m]
122 return i or { width = 0, stretch = 0, shrink = 0,
123 stretch_order = 0, shrink_order = 0 }
126 function get_penalty_table(m,c,d, idx)
127 local i = charprop_stack_table[idx][c]