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#!/usr/bin/env Python
"""
Definition List Extension for Python-Markdown
=============================================
Added parsing of Definition Lists to Python-Markdown.
A simple example:
Apple
: Pomaceous fruit of plants of the genus Malus in
the family Rosaceae.
: An american computer company.
Orange
: The fruit of an evergreen tree of the genus Citrus.
Copyright 2008 - [Waylan Limberg](http://achinghead.com)
"""
import markdown, re
from markdown import etree
class DefListProcessor(markdown.blockprocessors.BlockProcessor):
""" Process Definition Lists. """
RE = re.compile(r'(^|\n)[ ]{0,3}:[ ]{1,3}(.*?)(\n|$)')
def test(self, parent, block):
return bool(self.RE.search(block))
def run(self, parent, blocks):
block = blocks.pop(0)
m = self.RE.search(block)
terms = [l.strip() for l in block[:m.start()].split('\n') if l.strip()]
d, theRest = self.detab(block[m.end():])
if d:
d = '%s\n%s' % (m.group(2), d)
else:
d = m.group(2)
#import ipdb; ipdb.set_trace()
sibling = self.lastChild(parent)
if not terms and sibling.tag == 'p':
# The previous paragraph contains the terms
state = 'looselist'
terms = sibling.text.split('\n')
parent.remove(sibling)
# Aquire new sibling
sibling = self.lastChild(parent)
else:
state = 'list'
if sibling and sibling.tag == 'dl':
# This is another item on an existing list
dl = sibling
if len(dl) and dl[-1].tag == 'dd' and len(dl[-1]):
state = 'looselist'
else:
# This is a new list
dl = etree.SubElement(parent, 'dl')
# Add terms
for term in terms:
dt = etree.SubElement(dl, 'dt')
dt.text = term
# Add definition
self.parser.state.set(state)
dd = etree.SubElement(dl, 'dd')
self.parser.parseBlocks(dd, [d])
self.parser.state.reset()
if theRest:
blocks.insert(0, theRest)
class DefListIndentProcessor(markdown.blockprocessors.ListIndentProcessor):
""" Process indented children of definition list items. """
ITEM_TYPES = ['dd']
LIST_TYPES = ['dl']
def create_item(parent, block):
""" Create a new dd and parse the block with it as the parent. """
dd = markdown.etree.SubElement(parent, 'dd')
self.parser.parseBlocks(dd, [block])
class DefListExtension(markdown.Extension):
""" Add definition lists to Markdown. """
def extendMarkdown(self, md, md_globals):
""" Add an instance of DefListProcessor to BlockParser. """
md.parser.blockprocessors.add('defindent',
DefListIndentProcessor(md.parser),
'>indent')
md.parser.blockprocessors.add('deflist',
DefListProcessor(md.parser),
'>ulist')
def makeExtension(configs={}):
return DefListExtension(configs=configs)
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