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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
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