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kivy/extras/highlight.py

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+'''Pygments lexer for kv language
+'''
+from pygments.lexer import RegexLexer, bygroups, using
+from pygments.lexers.agile import PythonLexer
+from pygments import highlight
+from pygments.token import Comment, Text, Name, Punctuation, Operator
+from pygments.formatters import get_formatter_by_name
+import sys
+
+
+class KivyLexer(RegexLexer):
+    name = 'Kivy'
+    aliases = ['kivy', 'kv']
+    filenames = ['*.kv']
+    tokens = {
+        'root': [
+            (r'#:.*?$', Comment.Preproc),
+            (r'#.*?$', using(PythonLexer)),
+            (r'\s+', Text),
+            (r'<.+>', Name.Namespace),
+            (r'(\[)(\s*)(.*?)(\s*)(@)',
+                bygroups(Punctuation, Text, Name.Class, Text, Operator),
+                'classList'),
+            (r'[A-Za-z][A-Za-z0-9]*$', Name.Attribute),
+            (r'(.*?)(\s*)(:)(\s*)$',
+                bygroups(Name.Class, Text, Punctuation, Text)),
+            (r'(.*?)(\s*)(:)(\s*)(.*?)$',
+                bygroups(Name.Attribute, Text, Punctuation, Text,
+                using(PythonLexer))),
+            (r'[^:]+?$', using(PythonLexer))],
+        'classList': [
+            (r'(,)(\s*)([A-Z][A-Za-z0-9]*)',
+                bygroups(Punctuation, Text, Name.Class)),
+            (r'(\+)(\s*)([A-Z][A-Za-z0-9]*)',
+                bygroups(Operator, Text, Name.Class)),
+            (r'\s+', Text),
+            (r'[A-Z][A-Za-z0-9]*', Name.Class),
+            (r'\]', Punctuation, '#pop')]}
+
+
+if __name__ == '__main__':
+    ''' This lexer will highlight .kv file. The first argument is the source
+    file, the second argument is the format of the destination and the third
+    argument is the output filename
+    '''
+    if len(sys.argv) != 4:
+        raise Exception('Three arguments expected, found %s' %
+            (len(sys.argv) - 1))
+    k = KivyLexer()
+    with open(sys.argv[1], 'r') as fd:
+        with open(sys.argv[3], 'w') as out:
+            highlight(fd.read(), k, get_formatter_by_name(sys.argv[2]), out)