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
|
local info = {
version = 1.002,
comment = "scintilla lpeg lexer for pdf xref",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files",
}
local lexer = lexer
local token = lexer.token
local P, R = lpeg.P, lpeg.R
-- xref
-- cardinal cardinal [character]
-- ..
-- %%EOF | startxref | trailer
local pdfxreflexer = { _NAME = "pdf-xref", _FILENAME = "scite-context-lexer-pdf-xref" }
local whitespace = lexer.WHITESPACE -- triggers states
local context = lexer.context
local patterns = context.patterns
local pdfobjectlexer = lexer.load("scite-context-lexer-pdf-object")
local spacing = patterns.spacing
local t_spacing = token(whitespace, spacing)
local p_trailer = P("trailer")
local t_number = token("number", R("09")^1)
* t_spacing
* token("number", R("09")^1)
* t_spacing
* (token("keyword", R("az","AZ")) * t_spacing)^-1
local t_xref = t_number^1
-- local t_xref = token("default", (1-p_trailer)^1)
-- * token("keyword", p_trailer)
-- * t_spacing
-- * pdfobjectlexer._shared.dictionary
pdfxreflexer._rules = {
{ 'whitespace', t_spacing },
{ 'xref', t_xref },
}
pdfxreflexer._tokenstyles = context.styleset
return pdfxreflexer
|
