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 local node_new = node.new
15 local id_whatsit = node.id('whatsit')
16 local sid_user = node.subtype('user_defined')
17 local STCK = luatexja.userid_table.STCK
20 charprop_stack_table={};
21 local charprop_stack_table = charprop_stack_table
22 charprop_stack_table[0]={}
25 function get_stack_level()
26 local i = tex.getcount('ltj@@stack')
27 local j = tex.currentgrouplevel
28 if j > tex.getcount('ltj@@group@level') then
29 i = i+1 -- new stack level
30 local gd = tex.globaldefs
31 if gd~=0 then tex.globaldefs = 0 end
32 -- 'tex.globaldefs = 0' is local even if \globaldefs > 0.
33 tex.setcount('ltj@@group@level', j)
34 for k,v in pairs(charprop_stack_table) do -- clear the stack above i
35 if k>=i then charprop_stack_table[k]=nil end
37 charprop_stack_table[i] = table.fastcopy(charprop_stack_table[i-1])
38 tex.setcount('ltj@@stack', i)
39 if gd~=0 then tex.globaldefs = gd end
40 if tex.nest[tex.nest.ptr].mode == -hmode then -- rest. hmode のみ
41 local g = node_new(id_whatsit, sid_user)
42 g.user_id=STCK; g.type=100; g.value=j; node.write(g)
48 function set_stack_table(m, p)
49 local i = get_stack_level()
50 charprop_stack_table[i][m] = p
51 if luatexja.isglobal=='global' then
52 for j,v in pairs(charprop_stack_table) do
53 charprop_stack_table[j][m] = p
57 local set_stack_table = set_stack_table
60 function set_stack_perchar(m,c,p,lb,ub)
61 if type(p)~='number' or p<lb or p>ub then
62 ltjb.package_error('luatexja',
63 "invalid code (".. tostring(p) .. ")",
64 "The code should in the range "..tostring(lb) .. '..' ..
65 tostring(ub) .. ".\n" ..
66 "I'm going to use 0 instead of that illegal code value.")
69 set_stack_table(m+ltjb.in_unicode(c, true), p)
73 function set_stack_font(m,c,p)
74 if type(c)~='number' or c<0 or c>255 then
75 ltjb.package_error('luatexja',
76 "invalid family number (".. tostring(c) .. ")",
77 "The family number should in the range 0 .. 255.\n" ..
78 "I'm going to use 0 instead of that illegal family number.")
81 set_stack_table(m+c, p)
84 -- EXT: store \ltj@tempskipa
85 function set_stack_skip(m,sp)
86 local i = get_stack_level()
87 if not sp then return end
88 if not charprop_stack_table[i][m] then
89 charprop_stack_table[i][m] = {}
91 charprop_stack_table[i][m].width = sp.width
92 charprop_stack_table[i][m].stretch = sp.stretch
93 charprop_stack_table[i][m].shrink = sp.shrink
94 charprop_stack_table[i][m].stretch_order = sp.stretch_order
95 charprop_stack_table[i][m].shrink_order = sp.shrink_order
96 if luatexja.isglobal=='global' then
97 for j,v in pairs(charprop_stack_table) do
98 if not charprop_stack_table[j][m] then charprop_stack_table[j][m] = {} end
99 charprop_stack_table[j][m].width = sp.width
100 charprop_stack_table[j][m].stretch = sp.stretch
101 charprop_stack_table[j][m].shrink = sp.shrink
102 charprop_stack_table[j][m].stretch_order = sp.stretch_order
103 charprop_stack_table[j][m].shrink_order = sp.shrink_order
108 -- These three functions are used in ltj-jfmglue.lua.
109 function report_stack_level(bsl)
110 table_current_stack = charprop_stack_table[bsl]
112 function fast_get_stack_skip(m)
113 return table_current_stack[m]
114 or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 }
117 -- For other situations, use the following instead:
118 function get_stack_skip(m, idx)
119 return charprop_stack_table[idx][m]
120 or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 }
122 function get_stack_table(mc, d, idx)
123 local i = charprop_stack_table[idx][mc]