Merge git@gitorious.org:python-markdown/mainline

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diff --git a/markdown_extensions/wikilink.py b/markdown_extensions/wikilink.py
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+#!/usr/bin/env python
+
+'''
+WikiLink Extention for Python-Markdown
+======================================
+
+Converts CamelCase words to relative links.  Requires Python-Markdown 1.6+
+
+Basic usage:
+
+    >>> import markdown
+    >>> text = "Some text with a WikiLink."
+    >>> md = markdown.markdown(text, ['wikilink'])
+    >>> md
+    u'<p>Some text with a <a href="/WikiLink/" class="wikilink">WikiLink</a>.\\n</p>'
+
+To define custom settings the simple way:
+
+    >>> md = markdown.markdown(text, 
+    ...     ['wikilink(base_url=/wiki/,end_url=.html,html_class=foo)']
+    ... )
+    >>> md
+    u'<p>Some text with a <a href="/wiki/WikiLink.html" class="foo">WikiLink</a>.\\n</p>'
+    
+Custom settings the complex way:
+
+    >>> md = markdown.Markdown(
+    ...     extensions = ['wikilink'], 
+    ...     extension_configs = {'wikilink': [
+    ...                                 ('base_url', 'http://example.com/'), 
+    ...                                 ('end_url', '.html'),
+    ...                                 ('html_class', '') ]},
+    ...     safe_mode = True)
+    >>> md.convert(text)
+    u'<p>Some text with a <a href="http://example.com/WikiLink.html">WikiLink</a>.\\n</p>'
+
+Use MetaData with mdx_meta.py (Note the blank html_class in MetaData):
+
+    >>> text = """wiki_base_url: http://example.com/
+    ... wiki_end_url:   .html
+    ... wiki_html_class:
+    ...
+    ... Some text with a WikiLink."""
+    >>> md = markdown.Markdown(extensions=['meta', 'wikilink'])
+    >>> md.convert(text)
+    u'<p>Some text with a <a href="http://example.com/WikiLink.html">WikiLink</a>.\\n</p>'
+
+MetaData should not carry over to next document:
+
+    >>> md.convert("No MetaData here.")
+    u'<p>No <a href="/MetaData/" class="wikilink">MetaData</a> here.\\n</p>'
+
+From the command line:
+
+    python markdown.py -x wikilink(base_url=http://example.com/,end_url=.html,html_class=foo) src.txt
+
+By [Waylan Limberg](http://achinghead.com/).
+
+Project website: http://achinghead.com/markdown-wikilinks/
+Contact: waylan [at] gmail [dot] com
+
+License: [BSD](http://www.opensource.org/licenses/bsd-license.php) 
+
+Version: 0.6 (May 2, 2008)
+
+Dependencies:
+* [Python 2.3+](http://python.org)
+* [Markdown 1.6+](http://www.freewisdom.org/projects/python-markdown/)
+'''
+
+import markdown
+from markdown import etree
+
+class WikiLinkExtension (markdown.Extension) :
+    def __init__(self, configs):
+        # set extension defaults
+        self.config = {
+                        'base_url' : ['/', 'String to append to beginning or URL.'],
+                        'end_url' : ['/', 'String to append to end of URL.'],
+                        'html_class' : ['wikilink', 'CSS hook. Leave blank for none.']
+        }
+        
+        # Override defaults with user settings
+        for key, value in configs :
+            self.setConfig(key, value)
+        
+    def extendMarkdown(self, md, md_globals):
+        self.md = md
+    
+        # append to end of inline patterns
+        WIKILINK_RE = r'''(?P<escape>\\|\b)(?P<camelcase>([A-Z]+[a-z-_]+){2,})\b'''
+        WIKILINK_PATTERN = WikiLinks(WIKILINK_RE, self.config)
+        WIKILINK_PATTERN.md = md
+        md.inlinePatterns.append(WIKILINK_PATTERN)  
+        
+
+class WikiLinks (markdown.BasePattern) :
+    def __init__(self, pattern, config):
+        markdown.BasePattern.__init__(self, pattern)
+        self.config = config
+  
+    def handleMatch(self, m):
+        if  m.group('escape') == '\\':
+            a = m.group('camelcase')
+        else:
+            base_url, end_url, html_class = self._getMeta()
+            url = '%s%s%s'% (base_url, m.group('camelcase'), end_url)
+            label = m.group('camelcase').replace('_', ' ')
+            a = etree.Element('a')
+            a.text = label
+            a.set('href', url)
+            if html_class:
+                a.set('class', html_class)
+        return a
+
+    def _getMeta(self):
+        """ Return meta data or config data. """
+        base_url = self.config['base_url'][0]
+        end_url = self.config['end_url'][0]
+        html_class = self.config['html_class'][0]
+        if hasattr(self.md, 'Meta'):
+            if self.md.Meta.has_key('wiki_base_url'):
+                base_url = self.md.Meta['wiki_base_url'][0]
+            if self.md.Meta.has_key('wiki_end_url'):
+                end_url = self.md.Meta['wiki_end_url'][0]
+            if self.md.Meta.has_key('wiki_html_class'):
+                html_class = self.md.Meta['wiki_html_class'][0]
+        return base_url, end_url, html_class
+    
+    def type(self):
+        return "WLink"
+
+
+def makeExtension(configs=None) :
+    return WikiLinkExtension(configs=configs)
+
+if __name__ == "__main__":
+    import doctest
+    doctest.testmod()
+