Added markdown parsing for comments so links in comments now appear properly.

Also rewrote part of the HTML rewriting code so it doesn't introduce an additional wrapping element in the output which was added due to a html5lib requirements on input.

python/packages/markdown/extensions/abbr.py

@@ -0,0 +1,96 @@
+'''
+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
+    ... """
+    >>> print markdown.markdown(text, ['abbr'])
+    <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 re
+import markdown
+from markdown.util 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()