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
143
144
145
146
147
148
149
150
151
152
153
154
|
if not modules then modules = { } end modules ['strc-rsc'] = {
version = 1.001,
comment = "companion to strc-ref.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- The scanner is in a separate module so that we can test without too
-- many dependencies.
-- The scanner accepts nested outer, but we don't care too much, maybe
-- some day we will have both but currently the innermost wins.
local lpegmatch, lpegP, lpegS, lpegCs, lpegCt, lpegCf, lpegCc, lpegC, lpegCg = lpeg.match, lpeg.P, lpeg.S, lpeg.Cs, lpeg.Ct, lpeg.Cf, lpeg.Cc, lpeg.C, lpeg.Cg
local find = string.find
local spaces = lpegP(" ")^0
local lparent = lpegP("(")
local rparent = lpegP(")")
local lbrace = lpegP("{")
local rbrace = lpegP("}")
local tcolon = lpegP(":::") -- component or outer
local dcolon = lpegP("::") -- outer
local scolon = lpegP(":") -- prefix
local backslash = lpegP("\\")
lparent = spaces * lparent * spaces
rparent = spaces * rparent * spaces
lbrace = spaces * lbrace * spaces
rbrace = spaces * rbrace * spaces
tcolon = spaces * tcolon * spaces
dcolon = spaces * dcolon * spaces
local endofall = spaces * lpegP(-1)
local o_token = 1 - rparent - rbrace - lparent - lbrace -- can be made more efficient
local a_token = 1 - rbrace
local s_token = 1 - lparent - lbrace
local i_token = 1 - lparent - lbrace - endofall
local f_token = 1 - lparent - lbrace - dcolon
local c_token = 1 - lparent - lbrace - tcolon
local hastexcode = lpegCg(lpegCc("has_tex") * lpegCc(true)) -- cannot be made to work
local component = lpegCg(lpegCc("component") * lpegCs(c_token^1))
local outer = lpegCg(lpegCc("outer") * lpegCs(f_token^1))
local operation = lpegCg(lpegCc("operation") * lpegCs(o_token^1))
local arguments = lpegCg(lpegCc("arguments") * lpegCs(a_token^0))
local special = lpegCg(lpegCc("special") * lpegCs(s_token^1))
local inner = lpegCg(lpegCc("inner") * lpegCs(i_token^1))
arguments = (lbrace * arguments * rbrace)^-1
component = component * tcolon
outer = outer * dcolon
operation = outer^-1 * operation -- special case: page(file::1) and file::page(1)
inner = inner * arguments
special = special * lparent * (operation * arguments)^-1 * rparent
local referencesplitter = spaces * lpegCf (lpegCt("") * (component + outer)^-1 * (special + inner)^-1 * endofall, rawset)
local prefixsplitter = lpegCs(lpegP((1-scolon)^1 * scolon)) * #-scolon * lpegCs(lpegP(1)^1)
local componentsplitter = lpegCs(lpegP((1-scolon)^1)) * scolon * #-scolon * lpegCs(lpegP(1)^1)
prefixsplitter = componentsplitter
local function splitreference(str)
if str and str ~= "" then
local t = lpegmatch(referencesplitter,str)
if t then
local a = t.arguments
if a and find(a,"\\") then
t.has_tex = true
else
local o = t.arguments
if o and find(o,"\\") then
t.has_tex = true
end
end
return t
end
end
end
local function splitprefix(str)
return lpegmatch(prefixsplitter,str)
end
local function splitcomponent(str)
return lpegmatch(componentsplitter,str)
end
-- register in the right namespace
structures = structures or { }
structures.references = structures.references or { }
local references = structures.references
references.referencesplitter = referencesplitter
references.splitreference = splitreference
references.prefixsplitter = prefixsplitter
references.splitprefix = splitprefix
references.componentsplitter = componentsplitter
references.splitcomponent = splitcomponent
-- test code:
-- inspect(splitreference([[component:::inner]]))
-- inspect(splitprefix([[component:::inner]]))
-- inspect(splitprefix([[component:inner]]))
-- inspect(splitreference([[ ]]))
-- inspect(splitreference([[ inner ]]))
-- inspect(splitreference([[ special ( operation { argument, argument } ) ]]))
-- inspect(splitreference([[ special ( operation { argument } ) ]]))
-- inspect(splitreference([[ special ( operation { argument, \argument } ) ]]))
-- inspect(splitreference([[ special ( operation { \argument } ) ]]))
-- inspect(splitreference([[ special ( operation ) ]]))
-- inspect(splitreference([[ special ( \operation ) ]]))
-- inspect(splitreference([[ special ( o\peration ) ]]))
-- inspect(splitreference([[ special ( ) ]]))
-- inspect(splitreference([[ inner { argument } ]]))
-- inspect(splitreference([[ inner { \argument } ]]))
-- inspect(splitreference([[ inner { ar\gument } ]]))
-- inspect(splitreference([[inner{a\rgument}]]))
-- inspect(splitreference([[ inner { argument, argument } ]]))
-- inspect(splitreference([[ inner { argument, \argument } ]])) -- fails: bug in lpeg?
-- inspect(splitreference([[ inner { \argument, \argument } ]]))
-- inspect(splitreference([[ outer :: ]]))
-- inspect(splitreference([[ outer :: inner]]))
-- inspect(splitreference([[ outer :: special (operation { argument,argument } ) ]]))
-- inspect(splitreference([[ outer :: special (operation { } )]]))
-- inspect(splitreference([[ outer :: special ( operation { argument, \argument } ) ]]))
-- inspect(splitreference([[ outer :: special ( operation ) ]]))
-- inspect(splitreference([[ outer :: special ( \operation ) ]]))
-- inspect(splitreference([[ outer :: special ( ) ]]))
-- inspect(splitreference([[ outer :: inner { argument } ]]))
-- inspect(splitreference([[ special ( outer :: operation ) ]]))
-- inspect(splitreference([[]]))
-- inspect(splitreference([[inner]]))
-- inspect(splitreference([[special(operation{argument,argument})]]))
-- inspect(splitreference([[special(operation)]]))
-- inspect(splitreference([[special(\operation)]]))
-- inspect(splitreference([[special()]]))
-- inspect(splitreference([[inner{argument}]]))
-- inspect(splitreference([[inner{\argument}]]))
-- inspect(splitreference([[outer::]]))
-- inspect(splitreference([[outer::inner]]))
-- inspect(splitreference([[outer::special(operation{argument,argument})]]))
-- inspect(splitreference([[outer::special(operation{argument,\argument})]]))
-- inspect(splitreference([[outer::special(operation)]]))
-- inspect(splitreference([[outer::special(\operation)]]))
-- inspect(splitreference([[outer::special()]]))
-- inspect(splitreference([[outer::inner{argument}]]))
-- inspect(splitreference([[special(outer::operation)]]))
|
