/usr/lib/python3/dist-packages/pygments/lexers/bibtex.py is in python3-pygments 2.2.0+dfsg-1.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | # -*- coding: utf-8 -*-
"""
pygments.lexers.bibtex
~~~~~~~~~~~~~~~~~~~~~~
Lexers for BibTeX bibliography data and styles
:copyright: Copyright 2006-2017 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, Text, \
Keyword, Punctuation
__all__ = ['BibTeXLexer', 'BSTLexer']
class BibTeXLexer(ExtendedRegexLexer):
"""
A lexer for BibTeX bibliography data format.
.. versionadded:: 2.2
"""
name = 'BibTeX'
aliases = ['bib', 'bibtex']
filenames = ['*.bib']
mimetypes = ["text/x-bibtex"]
flags = re.IGNORECASE
ALLOWED_CHARS = r'@!$&*+\-./:;<>?\[\\\]^`|~'
IDENTIFIER = '[{0}][{1}]*'.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'),
('@comment', 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'),
('[^\{\"]+', String),
],
'braced-string': [
(r'\{', String, '#push'),
(r'\}', String, '#pop'),
('[^\{\}]+', String),
],
'whitespace': [
(r'\s+', Text),
],
}
class BSTLexer(RegexLexer):
"""
A lexer for BibTeX bibliography styles.
.. versionadded:: 2.2
"""
name = 'BST'
aliases = ['bst', 'bst-pybtex']
filenames = ['*.bst']
flags = re.IGNORECASE | re.MULTILINE
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': [
('\s+', Text),
('%.*?$', Comment.SingleLine),
],
}
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