160 lines
4.7 KiB
Python
160 lines
4.7 KiB
Python
"""
|
|
pygments.lexers.bibtex
|
|
~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Lexers for BibTeX bibliography data and styles
|
|
|
|
:copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
|
|
:license: BSD, see LICENSE for details.
|
|
"""
|
|
|
|
import re
|
|
|
|
from pygments.lexer import RegexLexer, ExtendedRegexLexer, include, default, \
|
|
words
|
|
from pygments.token import Name, Comment, String, Error, Number, Keyword, \
|
|
Punctuation, Whitespace
|
|
|
|
__all__ = ['BibTeXLexer', 'BSTLexer']
|
|
|
|
|
|
class BibTeXLexer(ExtendedRegexLexer):
|
|
"""
|
|
A lexer for BibTeX bibliography data format.
|
|
"""
|
|
|
|
name = 'BibTeX'
|
|
aliases = ['bibtex', 'bib']
|
|
filenames = ['*.bib']
|
|
mimetypes = ["text/x-bibtex"]
|
|
version_added = '2.2'
|
|
flags = re.IGNORECASE
|
|
url = 'https://texfaq.org/FAQ-BibTeXing'
|
|
|
|
ALLOWED_CHARS = r'@!$&*+\-./:;<>?\[\\\]^`|~'
|
|
IDENTIFIER = '[{}][{}]*'.format('a-z_' + ALLOWED_CHARS, r'\w' + ALLOWED_CHARS)
|
|
|
|
def open_brace_callback(self, match, ctx):
|
|
opening_brace = match.group()
|
|
ctx.opening_brace = opening_brace
|
|
yield match.start(), Punctuation, opening_brace
|
|
ctx.pos = match.end()
|
|
|
|
def close_brace_callback(self, match, ctx):
|
|
closing_brace = match.group()
|
|
if (
|
|
ctx.opening_brace == '{' and closing_brace != '}' or
|
|
ctx.opening_brace == '(' and closing_brace != ')'
|
|
):
|
|
yield match.start(), Error, closing_brace
|
|
else:
|
|
yield match.start(), Punctuation, closing_brace
|
|
del ctx.opening_brace
|
|
ctx.pos = match.end()
|
|
|
|
tokens = {
|
|
'root': [
|
|
include('whitespace'),
|
|
(r'@comment(?!ary)', Comment),
|
|
('@preamble', Name.Class, ('closing-brace', 'value', 'opening-brace')),
|
|
('@string', Name.Class, ('closing-brace', 'field', 'opening-brace')),
|
|
('@' + IDENTIFIER, Name.Class,
|
|
('closing-brace', 'command-body', 'opening-brace')),
|
|
('.+', Comment),
|
|
],
|
|
'opening-brace': [
|
|
include('whitespace'),
|
|
(r'[{(]', open_brace_callback, '#pop'),
|
|
],
|
|
'closing-brace': [
|
|
include('whitespace'),
|
|
(r'[})]', close_brace_callback, '#pop'),
|
|
],
|
|
'command-body': [
|
|
include('whitespace'),
|
|
(r'[^\s\,\}]+', Name.Label, ('#pop', 'fields')),
|
|
],
|
|
'fields': [
|
|
include('whitespace'),
|
|
(',', Punctuation, 'field'),
|
|
default('#pop'),
|
|
],
|
|
'field': [
|
|
include('whitespace'),
|
|
(IDENTIFIER, Name.Attribute, ('value', '=')),
|
|
default('#pop'),
|
|
],
|
|
'=': [
|
|
include('whitespace'),
|
|
('=', Punctuation, '#pop'),
|
|
],
|
|
'value': [
|
|
include('whitespace'),
|
|
(IDENTIFIER, Name.Variable),
|
|
('"', String, 'quoted-string'),
|
|
(r'\{', String, 'braced-string'),
|
|
(r'[\d]+', Number),
|
|
('#', Punctuation),
|
|
default('#pop'),
|
|
],
|
|
'quoted-string': [
|
|
(r'\{', String, 'braced-string'),
|
|
('"', String, '#pop'),
|
|
(r'[^\{\"]+', String),
|
|
],
|
|
'braced-string': [
|
|
(r'\{', String, '#push'),
|
|
(r'\}', String, '#pop'),
|
|
(r'[^\{\}]+', String),
|
|
],
|
|
'whitespace': [
|
|
(r'\s+', Whitespace),
|
|
],
|
|
}
|
|
|
|
|
|
class BSTLexer(RegexLexer):
|
|
"""
|
|
A lexer for BibTeX bibliography styles.
|
|
"""
|
|
|
|
name = 'BST'
|
|
aliases = ['bst', 'bst-pybtex']
|
|
filenames = ['*.bst']
|
|
version_added = '2.2'
|
|
flags = re.IGNORECASE | re.MULTILINE
|
|
url = 'https://texfaq.org/FAQ-BibTeXing'
|
|
|
|
tokens = {
|
|
'root': [
|
|
include('whitespace'),
|
|
(words(['read', 'sort']), Keyword),
|
|
(words(['execute', 'integers', 'iterate', 'reverse', 'strings']),
|
|
Keyword, ('group')),
|
|
(words(['function', 'macro']), Keyword, ('group', 'group')),
|
|
(words(['entry']), Keyword, ('group', 'group', 'group')),
|
|
],
|
|
'group': [
|
|
include('whitespace'),
|
|
(r'\{', Punctuation, ('#pop', 'group-end', 'body')),
|
|
],
|
|
'group-end': [
|
|
include('whitespace'),
|
|
(r'\}', Punctuation, '#pop'),
|
|
],
|
|
'body': [
|
|
include('whitespace'),
|
|
(r"\'[^#\"\{\}\s]+", Name.Function),
|
|
(r'[^#\"\{\}\s]+\$', Name.Builtin),
|
|
(r'[^#\"\{\}\s]+', Name.Variable),
|
|
(r'"[^\"]*"', String),
|
|
(r'#-?\d+', Number),
|
|
(r'\{', Punctuation, ('group-end', 'body')),
|
|
default('#pop'),
|
|
],
|
|
'whitespace': [
|
|
(r'\s+', Whitespace),
|
|
('%.*?$', Comment.Single),
|
|
],
|
|
}
|