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"""
pygments.lexers.graphviz
~~~~~~~~~~~~~~~~~~~~~~~~
Lexer for the DOT language (graphviz).
:copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from pygments.lexer import RegexLexer, bygroups
from pygments.token import Comment, Keyword, Operator, Name, String, Number, \
Punctuation, Whitespace
__all__ = ['GraphvizLexer']
class GraphvizLexer(RegexLexer):
"""
For graphviz DOT graph description language.
.. versionadded:: 2.8
"""
name = 'Graphviz'
url = 'https://www.graphviz.org/doc/info/lang.html'
aliases = ['graphviz', 'dot']
filenames = ['*.gv', '*.dot']
mimetypes = ['text/x-graphviz', 'text/vnd.graphviz']
tokens = {
'root': [
(r'\s+', Whitespace),
(r'(#|//).*?$', Comment.Single),
(r'/(\\\n)?[*](.|\n)*?[*](\\\n)?/', Comment.Multiline),
(r'(?i)(node|edge|graph|digraph|subgraph|strict)\b', Keyword),
(r'--|->', Operator),
(r'[{}[\]:;,]', Punctuation),
(r'(\b\D\w*)(\s*)(=)(\s*)',
bygroups(Name.Attribute, Whitespace, Punctuation, Whitespace),
'attr_id'),
(r'\b(n|ne|e|se|s|sw|w|nw|c|_)\b', Name.Builtin),
(r'\b\D\w*', Name.Tag), # node
(r'[-]?((\.[0-9]+)|([0-9]+(\.[0-9]*)?))', Number),
(r'"(\\"|[^"])*?"', Name.Tag), # quoted node
(r'<', Punctuation, 'xml'),
],
'attr_id': [
(r'\b\D\w*', String, '#pop'),
(r'[-]?((\.[0-9]+)|([0-9]+(\.[0-9]*)?))', Number, '#pop'),
(r'"(\\"|[^"])*?"', String.Double, '#pop'),
(r'<', Punctuation, ('#pop', 'xml')),
],
'xml': [
(r'<', Punctuation, '#push'),
(r'>', Punctuation, '#pop'),
(r'\s+', Whitespace),
(r'[^<>\s]', Name.Tag),
]
}