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-'''
-Abbreviation Extension for Python-Markdown
-==========================================
-
-This extension adds abbreviation handling to Python-Markdown.
-
-Simple Usage:
-
- >>> import markdown
- >>> text = """
- ... Some text with an ABBR and a REF. Ignore REFERENCE and ref.
- ...
- ... *[ABBR]: Abbreviation
- ... *[REF]: Abbreviation Reference
- ... """
- >>> markdown.markdown(text, ['abbr'])
- u'<p>Some text with an <abbr title="Abbreviation">ABBR</abbr> and a <abbr title="Abbreviation Reference">REF</abbr>. Ignore REFERENCE and ref.</p>'
-
-Copyright 2007-2008
-* [Waylan Limberg](http://achinghead.com/)
-* [Seemant Kulleen](http://www.kulleen.org/)
-
-
-'''
-
-import markdown, re
-from markdown import etree
-
-# Global Vars
-ABBR_REF_RE = re.compile(r'[*]\[(?P<abbr>[^\]]*)\][ ]?:\s*(?P<title>.*)')
-
-class AbbrExtension(markdown.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(markdown.preprocessors.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(markdown.inlinepatterns.Pattern):
- """ Abbreviation inline pattern. """
-
- def __init__(self, pattern, title):
- markdown.inlinepatterns.Pattern.__init__(self, pattern)
- self.title = title
-
- def handleMatch(self, m):
- abbr = etree.Element('abbr')
- abbr.text = m.group('abbr')
- abbr.set('title', self.title)
- return abbr
-
-def makeExtension(configs=None):
- return AbbrExtension(configs=configs)
-
-if __name__ == "__main__":
- import doctest
- doctest.testmod()