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Contents
require "bibtex"
require "bibtex/filters"
require "latex/decode/base"
require "latex/decode/maths"
require "latex/decode/accents"
require "latex/decode/diacritics"
require "latex/decode/punctuation"
require "latex/decode/symbols"
require "latex/decode/greek"
module AsciidoctorBibliography
module Databases
module BibTeX
EXTENSIONS = %w[.bib .bibtex .biblatex].freeze
def self.load(filename)
# TODO: detect BibLaTeX code w/ other extensions
warn <<~MESSAGE if File.extname(filename) == '.biblatex'
WARNING: you are requiring a BibLaTeX database; only features compatible with BibTeX are guaranteed to work.
MESSAGE
::BibTeX.open(filename, filter: [LatexFilter]).to_citeproc
end
# NOTE: the class below comes from asciidoctor-bibtex
# This filter extends the original latex filter in bibtex-ruby to handle
# unknown latex macros more gracefully. We could have used latex-decode
# gem together with our custom replacement rules, but latex-decode eats up
# all braces after it finishes all decoding. So we hack over the
# LaTeX.decode function and insert our rules before `strip_braces`.
class LatexFilter < ::BibTeX::Filter
def apply(value) # rubocop:disable Metrics/MethodLength; keep this a list, though!
text = value.to_s
LaTeX::Decode::Base.normalize(text)
LaTeX::Decode::Maths.decode!(text)
LaTeX::Decode::Accents.decode!(text)
LaTeX::Decode::Diacritics.decode!(text)
LaTeX::Decode::Punctuation.decode!(text)
LaTeX::Decode::Symbols.decode!(text)
LaTeX::Decode::Greek.decode!(text)
# TODO: could we be doing something smarter with some macros, e.g. \url?
text.gsub!(/\\url\{(.+?)\}/, ' \\1 ')
text.gsub!(/\\\w+(?=\s+\w)/, "")
text.gsub!(/\\\w+(?:\[.+?\])?\s*\{(.+?)\}/, '\\1')
LaTeX::Decode::Base.strip_braces(text)
LaTeX.normalize_C(text)
end
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems