summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/luatex/luatexja/ltj-stack.lua
blob: c9f80c4686fa8e59d6a03125a86f8cf9a67d879e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
--
-- luatexja/stack.lua
--
luatexbase.provides_module({
  name = 'luatexja.stack',
  date = '2017/05/05',
  description = 'LuaTeX-ja stack system',
})
module('luatexja.stack', package.seeall)
local err, warn, info, log = luatexbase.errwarinf(_NAME)

luatexja.load_module('base');      local ltjb = luatexja.base

--------------------------------------------------------------------------------
-- stack table (obeys TeX's grouping)
--------------------------------------------------------------------------------
local node_new = node.new
local id_whatsit = node.id('whatsit')
local sid_user = node.subtype('user_defined')
local STCK = luatexja.userid_table.STCK
local fastcopy = table.fastcopy
local setcount = tex.setcount
local scan_int, scan_keyword = token.scan_int, token.scan_keyword
hmode = 0 -- dummy

charprop_stack_table={};
local charprop_stack_table = charprop_stack_table
charprop_stack_table[0]={}


function get_stack_level()
   local i = tex.getcount('ltj@@stack')
   local j = tex.currentgrouplevel
   if j > tex.getcount('ltj@@group@level') then
      i = i+1 -- new stack level
      local gd = tex.globaldefs
      if gd~=0 then tex.globaldefs = 0 end
      --  'tex.globaldefs = 0' is local even if \globaldefs > 0.
      setcount('ltj@@group@level', j)
      for k,v in pairs(charprop_stack_table) do -- clear the stack above i
	 if k>=i then charprop_stack_table[k]=nil end
      end
      charprop_stack_table[i] = fastcopy(charprop_stack_table[i-1])
      setcount('ltj@@stack', i)
      if gd~=0 then tex.globaldefs = gd end
      if  tex.nest[tex.nest.ptr].mode == -hmode then -- rest. hmode のみ
	 local g = node_new(id_whatsit, sid_user)
	 g.user_id=STCK; g.type=100; g.value=j; node.write(g)
      end
   end
   return i
end

function set_stack_table(m, p)
   local i = get_stack_level()
   charprop_stack_table[i][m] = p
   if luatexja.isglobal=='global' then
      for j,v in pairs(charprop_stack_table) do
         charprop_stack_table[j][m] = p
      end
   end
end
local set_stack_table = set_stack_table

-- EXT
function set_stack_perchar(m,lb,ub, getter)
   local c = scan_int()
   scan_keyword(',')
   local p = tonumber((getter or scan_int)())
   if p<lb or p>ub then
      ltjb.package_error('luatexja',
			 "invalid code (".. tostring(p) .. ")",
			 "The code should in the range "..tostring(lb) .. '..' ..
			 tostring(ub) .. ".\n" ..
		      "I'm going to use 0 instead of that illegal code value.")
      p=0
   end
   set_stack_table(m+ltjb.in_unicode(c, true), p)
end

-- EXT
function set_stack_font(m,c,p)
   if type(c)~='number' or c<0 or c>255 then
      ltjb.package_error('luatexja',
			 "invalid family number (".. tostring(c) .. ")",
			 "The family number should in the range 0 .. 255.\n" ..
			  "I'm going to use 0 instead of that illegal family number.")
      c=0
   end
   set_stack_table(m+c, p)
end

-- EXT: sp: glue_spec
function set_stack_skip(m,sp)
  local i = get_stack_level()
  if not sp then return end
  if not charprop_stack_table[i][m] then
     charprop_stack_table[i][m] = {}
  end
  charprop_stack_table[i][m].width   = sp.width
  charprop_stack_table[i][m].stretch = sp.stretch
  charprop_stack_table[i][m].shrink  = sp.shrink
  charprop_stack_table[i][m].stretch_order = sp.stretch_order
  charprop_stack_table[i][m].shrink_order  = sp.shrink_order
  if luatexja.isglobal=='global' then
     for j,v in pairs(charprop_stack_table) do
	if not charprop_stack_table[j][m] then charprop_stack_table[j][m] = {} end
	charprop_stack_table[j][m].width   = sp.width
	charprop_stack_table[j][m].stretch = sp.stretch
	charprop_stack_table[j][m].shrink  = sp.shrink
	charprop_stack_table[j][m].stretch_order = sp.stretch_order
	charprop_stack_table[j][m].shrink_order  = sp.shrink_order
     end
  end
end

-- These three functions are used in ltj-jfmglue.lua.
-- list_dir and orig_char_table are used in other lua files.
orig_char_table = {}
list_dir = nil -- dummy
table_current_stack = nil -- dummy
function report_stack_level(bsl)
   table_current_stack = charprop_stack_table[bsl]
   return bsl
end
function fast_get_stack_skip(m)
   return table_current_stack[m]
      or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 }
end

-- For other situations, use the following instead:
function get_stack_skip(m, idx)
   return charprop_stack_table[idx][m]
      or { width = 0, stretch = 0, shrink = 0, stretch_order = 0, shrink_order = 0 }
end
function get_stack_table(mc, d, idx)
   local i = charprop_stack_table[idx][mc]
   return i or d
end


-- EOF