Revert of Check in a simple pure-python based Markdown previewer.

third_party/Python-Markdown/markdown/extensions/abbr.py

-'''
-Abbreviation Extension for Python-Markdown
-==========================================
-
-This extension adds abbreviation handling to Python-Markdown.
-
-See <https://pythonhosted.org/Markdown/extensions/abbreviations.html>
-for documentation.
-
-Oringinal code Copyright 2007-2008 [Waylan Limberg](http://achinghead.com/) and
- [Seemant Kulleen](http://www.kulleen.org/)
-
-All changes Copyright 2008-2014 The Python Markdown Project
-
-License: [BSD](http://www.opensource.org/licenses/bsd-license.php)
-
-'''
-
-from __future__ import absolute_import
-from __future__ import unicode_literals
-from . import Extension
-from ..preprocessors import Preprocessor
-from ..inlinepatterns import Pattern
-from ..util import etree, AtomicString
-import re
-
-# Global Vars
-ABBR_REF_RE = re.compile(r'[*]\[(?P<abbr>[^\]]*)\][ ]?:\s*(?P<title>.*)')
-
-
-class AbbrExtension(Extension):
-    """ Abbreviation Extension for Python-Markdown. """
-
-    def extendMarkdown(self, md, md_globals):
-        """ Insert AbbrPreprocessor before ReferencePreprocessor. """
-        md.preprocessors.add('abbr', AbbrPreprocessor(md), '<reference')
-
-
-class AbbrPreprocessor(Preprocessor):
-    """ Abbreviation Preprocessor - parse text for abbr references. """
-
-    def run(self, lines):
-        '''
-        Find and remove all Abbreviation references from the text.
-        Each reference is set as a new AbbrPattern in the markdown instance.
-
-        '''
-        new_text = []
-        for line in lines:
-            m = ABBR_REF_RE.match(line)
-            if m:
-                abbr = m.group('abbr').strip()
-                title = m.group('title').strip()
-                self.markdown.inlinePatterns['abbr-%s' % abbr] = \
-                    AbbrPattern(self._generate_pattern(abbr), title)
-            else:
-                new_text.append(line)
-        return new_text
-
-    def _generate_pattern(self, text):
-        '''
-        Given a string, returns an regex pattern to match that string.
-
-        'HTML' -> r'(?P<abbr>[H][T][M][L])'
-
-        Note: we force each char as a literal match (in brackets) as we don't
-        know what they will be beforehand.
-
-        '''
-        chars = list(text)
-        for i in range(len(chars)):
-            chars[i] = r'[%s]' % chars[i]
-        return r'(?P<abbr>\b%s\b)' % (r''.join(chars))
-
-
-class AbbrPattern(Pattern):
-    """ Abbreviation inline pattern. """
-
-    def __init__(self, pattern, title):
-        super(AbbrPattern, self).__init__(pattern)
-        self.title = title
-
-    def handleMatch(self, m):
-        abbr = etree.Element('abbr')
-        abbr.text = AtomicString(m.group('abbr'))
-        abbr.set('title', self.title)
-        return abbr
-
-
-def makeExtension(*args, **kwargs):
-    return AbbrExtension(*args, **kwargs)