intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 58 insertions, 0 deletions

diff --git a/contrib/python/Pygments/py3/pygments/lexers/graphviz.py b/contrib/python/Pygments/py3/pygments/lexers/graphviz.py
new file mode 100644
index 0000000000..a685933744
--- /dev/null
+++ b/contrib/python/Pygments/py3/pygments/lexers/graphviz.py
@@ -0,0 +1,58 @@
+"""
+    pygments.lexers.graphviz
+    ~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Lexer for the DOT language (graphviz).
+
+    :copyright: Copyright 2006-2021 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'
+    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),
+        ]
+    }