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1 ''' | |
2 Smart_Strong Extension for Python-Markdown | |
3 ========================================== | |
4 | |
5 This extention adds smarter handling of double underscores within words. | |
6 | |
7 See <https://pythonhosted.org/Markdown/extensions/smart_strong.html> | |
8 for documentation. | |
9 | |
10 Original code Copyright 2011 [Waylan Limberg](http://achinghead.com) | |
11 | |
12 All changes Copyright 2011-2014 The Python Markdown Project | |
13 | |
14 License: [BSD](http://www.opensource.org/licenses/bsd-license.php) | |
15 | |
16 ''' | |
17 | |
18 from __future__ import absolute_import | |
19 from __future__ import unicode_literals | |
20 from . import Extension | |
21 from ..inlinepatterns import SimpleTagPattern | |
22 | |
23 SMART_STRONG_RE = r'(?<!\w)(_{2})(?!_)(.+?)(?<!_)\2(?!\w)' | |
24 STRONG_RE = r'(\*{2})(.+?)\2' | |
25 | |
26 | |
27 class SmartEmphasisExtension(Extension): | |
28 """ Add smart_emphasis extension to Markdown class.""" | |
29 | |
30 def extendMarkdown(self, md, md_globals): | |
31 """ Modify inline patterns. """ | |
32 md.inlinePatterns['strong'] = SimpleTagPattern(STRONG_RE, 'strong') | |
33 md.inlinePatterns.add( | |
34 'strong2', | |
35 SimpleTagPattern(SMART_STRONG_RE, 'strong'), | |
36 '>emphasis2' | |
37 ) | |
38 | |
39 | |
40 def makeExtension(*args, **kwargs): | |
41 return SmartEmphasisExtension(*args, **kwargs) | |
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