diff options
Diffstat (limited to 'markdown_extensions/meta.py')
-rw-r--r-- | markdown_extensions/meta.py | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/markdown_extensions/meta.py b/markdown_extensions/meta.py new file mode 100644 index 0000000..30dea8a --- /dev/null +++ b/markdown_extensions/meta.py @@ -0,0 +1,81 @@ +#!usr/bin/python + +''' +Meta Data Extension for Python-Markdown +========================================== + +This extension adds Meta Data handling to markdown. + + >>> import markdown + >>> text = """Title: A Test Doc. + ... Author: Waylan Limberg + ... John Doe + ... Blank_Data: + ... + ... The body. This is paragraph one. + ... """ + >>> md = markdown.Markdown(text, ['meta']) + >>> md.convert() + u'<p>The body. This is paragraph one.\\n</p>' + >>> md.Meta + {u'blank_data': [u''], u'author': [u'Waylan Limberg', u'John Doe'], u'title': [u'A Test Doc.']} + +Make sure text without Meta Data still works (markdown < 1.6b returns a <p>). + + >>> text = ' Some Code - not extra lines of meta data.' + >>> md = markdown.Markdown(text, ['meta']) + >>> md.convert() + u'<pre><code>Some Code - not extra lines of meta data.\\n</code></pre>' + >>> md.Meta + {} + +''' + +import markdown, re + +# Global Vars +META_RE = re.compile(r'^[ ]{0,3}(?P<key>[A-Za-z0-9_-]+):\s*(?P<value>.*)') +META_MORE_RE = re.compile(r'^[ ]{4,}(?P<value>.*)') + +class MetaExtension (markdown.Extension) : + def __init__(self, configs): + pass + + def extendMarkdown(self, md, md_globals) : + self.md = md + + # Insert meta preprocessor first + META_PREPROCESSOR = MetaPreprocessor() + META_PREPROCESSOR.md = md + md.preprocessors.insert(0, META_PREPROCESSOR) + +class MetaPreprocessor(markdown.Preprocessor) : + def run(self, lines) : + meta = {} + key = None + while 1: + line = lines.pop(0) + if line.strip() == '': + break # blank line - done + m1 = META_RE.match(line) + if m1: + key = m1.group('key').lower().strip() + meta[key] = [m1.group('value').strip()] + else: + m2 = META_MORE_RE.match(line) + if m2 and key: + # Add another line to existing key + meta[key].append(m2.group('value').strip()) + else: + lines.insert(0, line) + break # no meta data - done + self.md.Meta = meta + return lines + + +def makeExtension(configs=None) : + return MetaExtension(configs=configs) + +if __name__ == "__main__": + import doctest + doctest.testmod() |