#!/usr/bin/env python
SPEED_TEST = 0
"""
====================================================================
IF YOU ARE LOOKING TO EXTEND MARKDOWN, SEE THE "FOOTNOTES" SECTION
====================================================================
Python-Markdown
===============
Converts Markdown to HTML. Basic usage as a module:
import markdown
html = markdown.markdown(your_text_string)
Started by [Manfred Stienstra](http://www.dwerg.net/). Continued and
maintained by [Yuri Takhteyev](http://www.freewisdom.org).
Project website: http://www.freewisdom.org/projects/python-markdown
Contact: yuri [at] freewisdom.org
License: GPL 2 (http://www.gnu.org/copyleft/gpl.html) or BSD
Version: 1.5 (May 15, 2006)
For changelog, see end of file
"""
import re, sys, os, random
# set debug level: 3 none, 2 critical, 1 informative, 0 all
(VERBOSE, INFO, CRITICAL, NONE) = range(4)
MESSAGE_THRESHOLD = CRITICAL
def message(level, text) :
if level >= MESSAGE_THRESHOLD :
print text
# --------------- CONSTANTS YOU MIGHT WANT TO MODIFY -----------------
# all tabs will be expanded to up to this many spaces
TAB_LENGTH = 4
ENABLE_ATTRIBUTES = 1
SMART_EMPHASIS = 1
# --------------- CONSTANTS YOU _SHOULD NOT_ HAVE TO CHANGE ----------
FN_BACKLINK_TEXT = "zz1337820767766393qq"
# a template for html placeholders
HTML_PLACEHOLDER_PREFIX = "qaodmasdkwaspemas"
HTML_PLACEHOLDER = HTML_PLACEHOLDER_PREFIX + "%dajkqlsmdqpakldnzsdfls"
BLOCK_LEVEL_ELEMENTS = ['p', 'div', 'blockquote', 'pre', 'table',
'dl', 'ol', 'ul', 'script', 'noscript',
'form', 'fieldset', 'iframe', 'math', 'ins',
'del', 'hr', 'hr/']
def is_block_level (tag) :
return ( (tag in BLOCK_LEVEL_ELEMENTS) or
(tag[0] == 'h' and tag[1] in "0123456789") )
"""
======================================================================
========================== NANODOM ===================================
======================================================================
The three classes below implement some of the most basic DOM
methods. I use this instead of minidom because I need a simpler
functionality and do not want to require additional libraries.
Importantly, NanoDom does not do normalization, which is what we
want. It also adds extra white space when converting DOM to string
"""
class Document :
def appendChild(self, child) :
self.documentElement = child
child.parent = self
self.entities = {}
def createElement(self, tag, textNode=None) :
el = Element(tag)
el.doc = self
if textNode :
el.appendChild(self.createTextNode(textNode))
return el
def createTextNode(self, text) :
node = TextNode(text)
node.doc = self
return node
def createEntityReference(self, entity):
if entity not in self.entities:
self.entities[entity] = EntityReference(entity)
return self.entities[entity]
def toxml (self) :
return self.documentElement.toxml()
def normalizeEntities(self, text) :
pairs = [ #("&", "&"),
("<", "<"),
(">", ">"),
("\"", """)]
for old, new in pairs :
text = text.replace(old, new)
return text
def find(self, test) :
return self.documentElement.find(test)
def unlink(self) :
self.documentElement.unlink()
self.documentElement = None
class Element :
type = "element"
def __init__ (self, tag) :
self.nodeName = tag
self.attributes = []
self.attribute_values = {}
self.childNodes = []
def unlink(self) :
for child in self.childNodes :
if child.type == "element" :
child.unlink()
self.childNodes = None
def setAttribute(self, attr, value) :
if not attr in self.attributes :
self.attributes.append(attr)
self.attribute_values[attr] = value
def insertChild(self, position, child) :
self.childNodes.insert(position, child)
child.parent = self
def removeChild(self, child) :
self.childNodes.remove(child)
def replaceChild(self, oldChild, newChild) :
position = self.childNodes.index(oldChild)
self.removeChild(oldChild)
self.insertChild(position, newChild)
def appendChild(self, child) :
self.childNodes.append(child)
child.parent = self
def handleAttributes(self) :
pass
def find(self, test, depth=0) :
""" Returns a list of descendants that pass the test function """
matched_nodes = []
for child in self.childNodes :
if test(child) :
matched_nodes.append(child)
if child.type == "element" :
matched_nodes += child.find(test, depth+1)
return matched_nodes
def toxml(self):
if ENABLE_ATTRIBUTES :
for child in self.childNodes:
child.handleAttributes()
buffer = ""
if self.nodeName in ['h1', 'h2', 'h3', 'h4'] :
buffer += "\n"
elif self.nodeName in ['li'] :
buffer += "\n "
buffer += "<" + self.nodeName
for attr in self.attributes :
value = self.attribute_values[attr]
value = self.doc.normalizeEntities(value)
buffer += ' %s="%s"' % (attr, value)
if self.childNodes or self.nodeName in ['blockquote']:
buffer += ">"
for child in self.childNodes :
buffer += child.toxml()
if self.nodeName == 'p' :
buffer += "\n"
elif self.nodeName == 'li' :
buffer += "\n "
buffer += "</%s>" % self.nodeName
else :
buffer += "/>"
if self.nodeName in ['p', 'li', 'ul', 'ol',
'h1', 'h2', 'h3', 'h4'] :
buffer += "\n"
return buffer
class TextNode :
type = "text"
attrRegExp = re.compile(r'\{@([^\}]*)=([^\}]*)}') # {@id=123}
def __init__ (self, text) :
self.value = text
def attributeCallback(self, match) :
self.parent.setAttribute(match.group(1), match.group(2))
def handleAttributes(self) :
self.value = self.attrRegExp.sub(self.attributeCallback, self.value)
def toxml(self) :
text = self.value
if not text.startswith(HTML_PLACEHOLDER_PREFIX):
if self.parent.nodeName == "p" :
text = text.replace("\n", "\n ")
elif (self.parent.nodeName == "li"
and self.parent.childNodes[0]==self):
text = "\n " + text.replace("\n", "\n ")
text = self.doc.normalizeEntities(text)
return text
class EntityReference:
type = "entity_ref"
def __init__(self, entity):
self.entity = entity
def handleAttributes(self):
pass
def toxml(self):
return "&" + self.entity + ";"
"""
======================================================================
========================== PRE-PROCESSORS ============================
======================================================================
Preprocessors munge source text before we start doing anything too
complicated.
Each preprocessor implements a "run" method that takes a pointer to
a list of lines of the document, modifies it as necessary and
returns either the same pointer or a pointer to a new list.
"""
class HeaderPreprocessor :
"""
Replaces underlined headers with hashed headers to avoid
the nead for lookahead later.
"""
def run (self, lines) :
for i in range(len(lines)) :
if not lines[i] :
continue
if lines[i].startswith("#") :
lines.insert(i+1, "\n")
if (i+1 <= len(lines)
and lines[i+1]
and lines[i+1][0] in ['-', '=']) :
underline = lines[i+1].strip()
if underline == "="*len(underline) :
lines[i] = "# " + lines[i].strip()
lines[i+1] = ""
elif underline == "-"*len(underline) :
lines[i] = "## " + lines[i].strip()
lines[i+1] = ""
return lines
HEADER_PREPROCESSOR = HeaderPreprocessor()
class LinePreprocessor :
"""Deals with HR lines (needs to be done before processing lists)"""
def run (self, lines) :
for i in range(len(lines)) :
if self._isLine(lines[i]) :
lines[i] = "<hr />"
return lines
def _isLine(self, block) :
"""Determines if a block should be replaced with an <HR>"""
if block.startswith(" ") : return 0 # a code block
text = "".join([x for x in block if not x.isspace()])
if len(text) <= 2 :
return 0
for pattern in ['isline1', 'isline2', 'isline3'] :
m = RE.regExp[pattern].match(text)
if (m and m.group(1)) :
return 1
else:
return 0
LINE_PREPROCESSOR = LinePreprocessor()
class LineBreaksPreprocessor :
"""Replaces double spaces at the end of the lines with <br/ >."""
def run (self, lines) :
for i in range(len(lines)) :
if (lines[i].endswith(" ")
and not RE.regExp['tabbed'].match(lines[i]) ):
lines[i] += "<br />"
return lines
LINE_BREAKS_PREPROCESSOR = LineBreaksPreprocessor()
class HtmlBlockPreprocessor :
"""Removes html blocks from self.lines"""
def run (self, lines) :
new_blocks = []
text = "\n".join(lines)
for block in text.split("\n\n") :
if block.startswith("\n") :
block = block[1:]
if ( (block.startswith("<") and block.rstrip().endswith(">"))
and (block[1] in ["!", "?", "@", "%"]
or is_block_level( block[1:].replace(">", " ")
.split()[0].lower()))) :
new_blocks.append(
self.stash.store(block.strip()))
else :
new_blocks.append(block)
return "\n\n".join(new_blocks).split("\n")
HTML_BLOCK_PREPROCESSOR = HtmlBlockPreprocessor()
class ReferencePreprocessor :
def run (self, lines) :
new_text = [];
for line in lines:
m = RE.regExp['reference-def'].match(line)
if m:
id = m.group(2).strip().lower()
title = dequote(m.group(4).strip()) #.replace('"', """)
self.references[id] = (m.group(3), title)
else:
new_text.append(line)
return new_text #+ "\n"
REFERENCE_PREPROCESSOR = ReferencePreprocessor()
"""
======================================================================
========================== INLINE PATTERNS ===========================
======================================================================
Inline patterns such as *emphasis* are handled by means of auxiliary
objects, one per pattern. Each pattern object uses a single regular
expression and needs support the following methods:
pattern.getCompiledRegExp() - returns a regular expression
pattern.handleMatch(m, doc) - takes a match object and returns
a NanoDom node (as a part of the provided
doc) or None
All of python markdown's built-in patterns subclass from BasePatter,
but you can add additional patterns that don't.
Also note that all the regular expressions used by inline must
capture the whole block. For this reason, they all start with
'^(.*)' and end with '(.*)!'. In case with built-in expression
BasePattern takes care of adding the "^(.*)" and "(.*)!".
Finally, the order in which regular expressions are applied is very
important - e.g. if we first replace http://.../ links with <a> tags
and _then_ try to replace inline html, we would end up with a mess.
So, we apply the expressions in the following order:
* escape and backticks have to go before everything else, so
that we can preempt any markdown patterns by escaping them.
* then we handle auto-links (must be done before inline html)
* then we handle inline HTML. At this point we will simply
replace all inline HTML strings with a placeholder and add
the actual HTML to a hash.
* then inline images (must be done before links)
* then bracketed links, first regular then reference-style
* finally we apply strong and emphasis
"""
NOBRACKET = r'[^\]\[]*'
BRK = ( r'\[('
+ (NOBRACKET + r'(\['+NOBRACKET)*6
+ (NOBRACKET+ r'\])*'+NOBRACKET)*6
+ NOBRACKET + r')\]' )
BACKTICK_RE = r'\`([^\`]*)\`' # `e= m*c^2`
DOUBLE_BACKTICK_RE = r'\`\`(.*)\`\`' # ``e=f("`")``
ESCAPE_RE = r'\\(.)' # \<
EMPHASIS_RE = r'\*([^\*]*)\*' # *emphasis*
STRONG_RE = r'\*\*(.*)\*\*' # **strong**
STRONG_EM_RE = r'\*\*\*([^_]*)\*\*\*' # ***strong***
if SMART_EMPHASIS:
EMPHASIS_2_RE = r'(?<!\S)_(\S[^_]*)_' # _emphasis_
else :
EMPHASIS_2_RE = r'_([^_]*)_' # _emphasis_
STRONG_2_RE = r'__([^_]*)__' # __strong__
STRONG_EM_2_RE = r'___([^_]*)___' # ___strong___
LINK_RE = BRK + r'\s*\(([^\)]*)\)' # [text](url)
LINK_ANGLED_RE = BRK + r'\s*\(<([^\)]*)>\)' # [text](<url>)
IMAGE_LINK_RE = r'\!' + BRK + r'\s*\(([^\)]*)\)' # 
REFERENCE_RE = BRK+ r'\s*\[([^\]]*)\]' # [Google][3]
IMAGE_REFERENCE_RE = r'\!' + BRK + '\s*\[([^\]]*)\]' # ![alt text][2]
NOT_STRONG_RE = r'( \* )' # stand-alone * or _
AUTOLINK_RE = r'<(http://[^>]*)>' # <http://www.123.com>
AUTOMAIL_RE = r'<([^> ]*@[^> ]*)>' # <me@example.com>
HTML_RE = r'(\<[^\>]*\>)' # <...>
ENTITY_RE = r'(&[\#a-zA-Z0-9]*;)' # &
class BasePattern:
def __init__ (self, pattern) :
self.pattern = pattern
self.compiled_re = re.compile("^(.*)%s(.*)$" % pattern, re.DOTALL)
def getCompiledRegExp (self) :
return self.compiled_re
class SimpleTextPattern (BasePattern) :
def handleMatch(self, m, doc) :
return doc.createTextNode(m.group(2))
class SimpleTagPattern (BasePattern):
def __init__ (self, pattern, tag) :
BasePattern.__init__(self, pattern)
self.tag = tag
def handleMatch(self, m, doc) :
el = doc.createElement(self.tag)
el.appendChild(doc.createTextNode(m.group(2)))
return el
class BacktickPattern (BasePattern):
def __init__ (self, pattern):
BasePattern.__init__(self, pattern)
self.tag = "code"
def handleMatch(self, m, doc) :
el = doc.createElement(self.tag)
text = m.group(2).strip()
text = text.replace("&", "&")
el.appendChild(doc.createTextNode(text))
return el
class DoubleTagPattern (SimpleTagPattern) :
def handleMatch(self, m, doc) :
tag1, tag2 = self.tag.split(",")
el1 = doc.createElement(tag1)
el2 = doc.createElement(tag2)
el1.appendChild(el2)
el2.appendChild(doc.createTextNode(m.group(2)))
return el1
class HtmlPattern (BasePattern):
def handleMatch (self, m, doc) :
place_holder = self.stash.store(m.group(2))
return doc.createTextNode(place_holder)
class LinkPattern (BasePattern):
def handleMatch(self, m, doc) :
el = doc.createElement('a')
el.appendChild(doc.createTextNode(m.group(2)))
parts = m.group(9).split()
# We should now have [], [href], or [href, title]
if parts :
el.setAttribute('href', parts[0])
else :
el.setAttribute('href', "")
if len(parts) > 1 :
# we also got a title
title = " ".join(parts[1:]).strip()
title = dequote(title) #.replace('"', """)
el.setAttribute('title', title)
return el
class ImagePattern (BasePattern):
def handleMatch(self, m, doc):
el = doc.createElement('img')
src_parts = m.group(9).split()
el.setAttribute('src', src_parts[0])
if len(src_parts) > 1 :
el.setAttribute('title', dequote(" ".join(src_parts[1:])))
if ENABLE_ATTRIBUTES :
text = doc.createTextNode(m.group(2))
el.appendChild(text)
text.handleAttributes()
truealt = text.value
el.childNodes.remove(text)
else:
truealt = m.group(2)
el.setAttribute('alt', truealt)
return el
class ReferencePattern (BasePattern):
def handleMatch(self, m, doc):
if m.group(9) :
id = m.group(9).lower()
else :
# if we got something like "[Google][]"
# we'll use "google" as the id
id = m.group(2).lower()
if not self.references.has_key(id) : # ignore undefined refs
return None
href, title = self.references[id]
text = m.group(2)
return self.makeTag(href, title, text, doc)
def makeTag(self, href, title, text, doc):
el = doc.createElement('a')
el.setAttribute('href', href)
if title :
el.setAttribute('title', title)
el.appendChild(doc.createTextNode(text))
return el
class ImageReferencePattern (ReferencePattern):
def makeTag(self, href, title, text, doc):
el = doc.createElement('img')
el.setAttribute('src', href)
if title :
el.setAttribute('title', title)
el.setAttribute('alt', text)
return el
class AutolinkPattern (BasePattern):
def handleMatch(self, m, doc):
el = doc.createElement('a')
el.setAttribute('href', m.group(2))
el.appendChild(doc.createTextNode(m.group(2)))
return el
class AutomailPattern (BasePattern):
def handleMatch(self, m, doc) :
el = doc.createElement('a')
email = m.group(2)
if email.startswith("mailto:"):
email = email[len("mailto:"):]
for letter in email:
entity = doc.createEntityReference("#%d" % ord(letter))
el.appendChild(entity)
mailto = "mailto:" + email
mailto = "".join(['&#%d;' % ord(letter) for letter in mailto])
el.setAttribute('href', mailto)
return el
ESCAPE_PATTERN = SimpleTextPattern(ESCAPE_RE)
NOT_STRONG_PATTERN = SimpleTextPattern(NOT_STRONG_RE)
BACKTICK_PATTERN = BacktickPattern(BACKTICK_RE)
DOUBLE_BACKTICK_PATTERN = BacktickPattern(DOUBLE_BACKTICK_RE)
STRONG_PATTERN = SimpleTagPattern(STRONG_RE, 'strong')
STRONG_PATTERN_2 = SimpleTagPattern(STRONG_2_RE, 'strong')
EMPHASIS_PATTERN = SimpleTagPattern(EMPHASIS_RE, 'em')
EMPHASIS_PATTERN_2 = SimpleTagPattern(EMPHASIS_2_RE, 'em')
STRONG_EM_PATTERN = DoubleTagPattern(STRONG_EM_RE, 'strong,em')
STRONG_EM_PATTERN_2 = DoubleTagPattern(STRONG_EM_2_RE, 'strong,em')
LINK_PATTERN = LinkPattern(LINK_RE)
LINK_ANGLED_PATTERN = LinkPattern(LINK_ANGLED_RE)
IMAGE_LINK_PATTERN = ImagePattern(IMAGE_LINK_RE)
IMAGE_REFERENCE_PATTERN = ImageReferencePattern(IMAGE_REFERENCE_RE)
REFERENCE_PATTERN = ReferencePattern(REFERENCE_RE)
HTML_PATTERN = HtmlPattern(HTML_RE)
ENTITY_PATTERN = HtmlPattern(ENTITY_RE)
AUTOLINK_PATTERN = AutolinkPattern(AUTOLINK_RE)
AUTOMAIL_PATTERN = AutomailPattern(AUTOMAIL_RE)
"""
======================================================================
========================== POST-PROCESSORS ===========================
======================================================================
Markdown also allows post-processors, which are similar to
preprocessors in that they need to implement a "run" method. Unlike
pre-processors, they take a NanoDom document as a parameter and work
with that.
#
There are currently no standard post-processors, but the footnote
extension below uses one.
"""
"""
======================================================================
========================== MISC AUXILIARY CLASSES ====================
======================================================================
"""
class HtmlStash :
"""This class is used for stashing HTML objects that we extract
in the beginning and replace with place-holders."""
def __init__ (self) :
self.html_counter = 0 # for counting inline html segments
self.rawHtmlBlocks=[]
def store(self, html) :
"""Saves an HTML segment for later reinsertion. Returns a
placeholder string that needs to be inserted into the
document.
@param html: an html segment
@returns : a placeholder string """
self.rawHtmlBlocks.append(html)
placeholder = HTML_PLACEHOLDER % self.html_counter
self.html_counter += 1
return placeholder
class BlockGuru :
def _findHead(self, lines, fn, allowBlank=0) :
"""Functional magic to help determine boundaries of indented
blocks.
@param lines: an array of strings
@param fn: a function that returns a substring of a string
if the string matches the necessary criteria
@param allowBlank: specifies whether it's ok to have blank
lines between matching functions
@returns: a list of post processes items and the unused
remainder of the original list"""
items = []
item = -1
i = 0 # to keep track of where we are
for line in lines :
if not line.strip() and not allowBlank:
return items, lines[i:]
if not line.strip() and allowBlank:
# If we see a blank line, this _might_ be the end
i += 1
# Find the next non-blank line
for j in range(i, len(lines)) :
if lines[j].strip() :
next = lines[j]
break
else :
# There is no more text => this is the end
break
# Check if the next non-blank line is still a part of the list
part = fn(next)
if part :
items.append("")
continue
else :
break # found end of the list
part = fn(line)
if part :
items.append(part)
i += 1
continue
else :
return items, lines[i:]
else :
i += 1
return items, lines[i:]
def detabbed_fn(self, line) :
""" An auxiliary method to be passed to _findHead """
m = RE.regExp['tabbed'].match(line)
if m:
return m.group(4)
else :
return None
def detectTabbed(self, lines) :
return self._findHead(lines, self.detabbed_fn,
allowBlank = 1)
def print_error(string):
"""Print an error string to stderr"""
sys.stderr.write(string +'\n')
def dequote(string) :
""" Removes quotes from around a string """
if ( ( string.startswith('"') and string.endswith('"'))
or (string.startswith("'") and string.endswith("'")) ) :
return string[1:-1]
else :
return string
"""
======================================================================
========================== CORE MARKDOWN =============================
======================================================================
This stuff is ugly, so if you are thinking of extending the syntax,
see first if you can do it via pre-processors, post-processors,
inline patterns or a combination of the three.
"""
class CorePatterns :
"""This class is scheduled for removal as part of a refactoring
effort."""
patterns = {
'header': r'(#*)([^#]*)(#*)', # # A title
'reference-def' : r'(\ ?\ ?\ ?)\[([^\]]*)\]:\s*([^ ]*)(.*)',
# [Google]: http://www.google.com/
'containsline': r'([-]*)$|^([=]*)', # -----, =====, etc.
'ol': r'[ ]{0,3}[\d]*\.\s+(.*)', # 1. text
'ul': r'[ ]{0,3}[*+-]\s+(.*)', # "* text"
'isline1': r'(\**)', # ***
'isline2': r'(\-*)', # ---
'isline3': r'(\_*)', # ___
'tabbed': r'((\t)|( ))(.*)', # an indented line
'quoted' : r'> ?(.*)', # a quoted block ("> ...")
}
def __init__ (self) :
self.regExp = {}
for key in self.patterns.keys() :
self.regExp[key] = re.compile("^%s$" % self.patterns[key],
re.DOTALL)
self.regExp['containsline'] = re.compile(r'^([-]*)$|^([=]*)$', re.M)
RE = CorePatterns()
class Markdown:
""" Markdown formatter class for creating an html document from
Markdown text """
def __init__(self, source=None):
"""Creates a new Markdown instance.
@param source: The text in Markdown format. """
if isinstance(source, unicode):
source = source.encode('utf8')
self.source = source
self.blockGuru = BlockGuru()
self.registeredExtensions = []
self.stripTopLevelTags = 1
self.preprocessors = [ HEADER_PREPROCESSOR,
LINE_PREPROCESSOR,
HTML_BLOCK_PREPROCESSOR,
LINE_BREAKS_PREPROCESSOR,
# A footnote preprocessor will
# get inserted here
REFERENCE_PREPROCESSOR ]
self.postprocessors = [] # a footnote postprocessor will get
# inserted later
self.prePatterns = []
self.inlinePatterns = [ DOUBLE_BACKTICK_PATTERN,
BACKTICK_PATTERN,
ESCAPE_PATTERN,
IMAGE_LINK_PATTERN,
IMAGE_REFERENCE_PATTERN,
REFERENCE_PATTERN,
LINK_ANGLED_PATTERN,
LINK_PATTERN,
AUTOLINK_PATTERN,
AUTOMAIL_PATTERN,
HTML_PATTERN,
ENTITY_PATTERN,
NOT_STRONG_PATTERN,
STRONG_EM_PATTERN,
STRONG_EM_PATTERN_2,
STRONG_PATTERN,
STRONG_PATTERN_2,
EMPHASIS_PATTERN,
EMPHASIS_PATTERN_2
# The order of the handlers matters!!!
]
self.reset()
def registerExtension(self, extension) :
self.registeredExtensions.append(extension)
def reset(self) :
"""Resets all state variables so that we can start
with a new text."""
self.references={}
self.htmlStash = HtmlStash()
HTML_BLOCK_PREPROCESSOR.stash = self.htmlStash
REFERENCE_PREPROCESSOR.references = self.references
HTML_PATTERN.stash = self.htmlStash
ENTITY_PATTERN.stash = self.htmlStash
REFERENCE_PATTERN.references = self.references
IMAGE_REFERENCE_PATTERN.references = self.references
for extension in self.registeredExtensions :
extension.reset()
def _transform(self):
"""Transforms the Markdown text into a XHTML body document
@returns: A NanoDom Document """
# Setup the document
self.doc = Document()
self.top_element = self.doc.createElement("span")
self.top_element.appendChild(self.doc.createTextNode('\n'))
self.top_element.setAttribute('class', 'markdown')
self.doc.appendChild(self.top_element)
# Fixup the source text
text = self.source.strip()
text = text.replace("\r\n", "\n").replace("\r", "\n")
text += "\n\n"
text = text.expandtabs(TAB_LENGTH)
# Split into lines and run the preprocessors that will work with
# self.lines
self.lines = text.split("\n")
# Run the pre-processors on the lines
for prep in self.preprocessors :
self.lines = prep.run(self.lines)
# Create a NanoDom tree from the lines and attach it to Document
buffer = []
for line in self.lines :
if line.startswith("#") :
self._processSection(self.top_element, buffer)
buffer = [line]
else :
buffer.append(line)
self._processSection(self.top_element, buffer)
#self._processSection(self.top_element, self.lines)
# Not sure why I put this in but let's leave it for now.
self.top_element.appendChild(self.doc.createTextNode('\n'))
# Run the post-processors
for postprocessor in self.postprocessors :
postprocessor.run(self.doc)
return self.doc
def _processSection(self, parent_elem, lines,
inList = 0, looseList = 0) :
"""Process a section of a source document, looking for high
level structural elements like lists, block quotes, code
segments, html blocks, etc. Some those then get stripped
of their high level markup (e.g. get unindented) and the
lower-level markup is processed recursively.
@param parent_elem: A NanoDom element to which the content
will be added
@param lines: a list of lines
@param inList: a level
@returns: None"""
if not lines :
return
# Check if this section starts with a list, a blockquote or
# a code block
processFn = { 'ul' : self._processUList,
'ol' : self._processOList,
'quoted' : self._processQuote,
'tabbed' : self._processCodeBlock }
for regexp in ['ul', 'ol', 'quoted', 'tabbed'] :
m = RE.regExp[regexp].match(lines[0])
if m :
processFn[regexp](parent_elem, lines, inList)
return
# We are NOT looking at one of the high-level structures like
# lists or blockquotes. So, it's just a regular paragraph
# (though perhaps nested inside a list or something else). If
# we are NOT inside a list, we just need to look for a blank
# line to find the end of the block. If we ARE inside a
# list, however, we need to consider that a sublist does not
# need to be separated by a blank line. Rather, the following
# markup is legal:
#
# * The top level list item
#
# Another paragraph of the list. This is where we are now.
# * Underneath we might have a sublist.
#
if inList :
start, theRest = self._linesUntil(lines, (lambda line:
RE.regExp['ul'].match(line)
or RE.regExp['ol'].match(line)
or not line.strip()))
self._processSection(parent_elem, start,
inList - 1, looseList = looseList)
self._processSection(parent_elem, theRest,
inList - 1, looseList = looseList)
else : # Ok, so it's just a simple block
paragraph, theRest = self._linesUntil(lines, lambda line:
not line.strip())
if len(paragraph) and paragraph[0].startswith('#') :
m = RE.regExp['header'].match(paragraph[0])
if m :
level = len(m.group(1))
h = self.doc.createElement("h%d" % level)
parent_elem.appendChild(h)
for item in self._handleInlineWrapper2(m.group(2).strip()) :
h.appendChild(item)
else :
message(CRITICAL, "We've got a problem header!")
elif paragraph :
list = self._handleInlineWrapper2("\n".join(paragraph))
if ( parent_elem.nodeName == 'li'
and not (looseList or parent_elem.childNodes)):
#and not parent_elem.childNodes) :
# If this is the first paragraph inside "li", don't
# put <p> around it - append the paragraph bits directly
# onto parent_elem
el = parent_elem
else :
# Otherwise make a "p" element
el = self.doc.createElement("p")
parent_elem.appendChild(el)
for item in list :
el.appendChild(item)
if theRest :
theRest = theRest[1:] # skip the first (blank) line
self._processSection(parent_elem, theRest, inList)
def _processUList(self, parent_elem, lines, inList) :
self._processList(parent_elem, lines, inList,
listexpr='ul', tag = 'ul')
def _processOList(self, parent_elem, lines, inList) :
self._processList(parent_elem, lines, inList,
listexpr='ol', tag = 'ol')
def _processList(self, parent_elem, lines, inList, listexpr, tag) :
"""Given a list of document lines starting with a list item,
finds the end of the list, breaks it up, and recursively
processes each list item and the remainder of the text file.
@param parent_elem: A dom element to which the content will be added
@param lines: a list of lines
@param inList: a level
@returns: None"""
ul = self.doc.createElement(tag) # ul might actually be '<ol>'
parent_elem.appendChild(ul)
looseList = 0
# Make a list of list items
items = []
item = -1
i = 0 # a counter to keep track of where we are
for line in lines :
loose = 0
if not line.strip() :
# If we see a blank line, this _might_ be the end of the list
i += 1
loose = 1
# Find the next non-blank line
for j in range(i, len(lines)) :
if lines[j].strip() :
next = lines[j]
break
else :
# There is no more text => end of the list
break
# Check if the next non-blank line is still a part of the list
if ( RE.regExp['ul'].match(next) or
RE.regExp['ol'].match(next) or
RE.regExp['tabbed'].match(next) ):
# get rid of any white space in the line
items[item].append(line.strip())
looseList = loose or looseList
continue
else :
break # found end of the list
# Now we need to detect list items (at the current level)
# while also detabing child elements if necessary
for expr in ['ul', 'ol', 'tabbed']:
m = RE.regExp[expr].match(line)
if m :
if expr in ['ul', 'ol'] : # We are looking at a new item
if m.group(1) :
items.append([m.group(1)])
item += 1
elif expr == 'tabbed' : # This line needs to be detabbed
items[item].append(m.group(4)) #after the 'tab'
i += 1
break
else :
items[item].append(line) # Just regular continuation
i += 1 # added on 2006.02.25
else :
i += 1
# Add the dom elements
for item in items :
li = self.doc.createElement("li")
ul.appendChild(li)
self._processSection(li, item, inList + 1, looseList = looseList)
# Process the remaining part of the section
self._processSection(parent_elem, lines[i:], inList)
def _linesUntil(self, lines, condition) :
""" A utility function to break a list of lines upon the
first line that satisfied a condition. The condition
argument should be a predicate function.
"""
i = -1
for line in lines :
i += 1
if condition(line) : break
else :
i += 1
return lines[:i], lines[i:]
def _processQuote(self, parent_elem, lines, inList) :
"""Given a list of document lines starting with a quote finds
the end of the quote, unindents it and recursively
processes the body of the quote and the remainder of the
text file.
@param parent_elem: DOM element to which the content will be added
@param lines: a list of lines
@param inList: a level
@returns: None """
dequoted = []
i = 0
for line in lines :
m = RE.regExp['quoted'].match(line)
if m :
dequoted.append(m.group(1))
i += 1
else :
break
else :
i += 1
blockquote = self.doc.createElement('blockquote')
parent_elem.appendChild(blockquote)
self._processSection(blockquote, dequoted, inList)
self._processSection(parent_elem, lines[i:], inList)
def _processCodeBlock(self, parent_elem, lines, inList) :
"""Given a list of document lines starting with a code block
finds the end of the block, puts it into the dom verbatim
wrapped in ("<pre><code>") and recursively processes the
the remainder of the text file.
@param parent_elem: DOM element to which the content will be added
@param lines: a list of lines
@param inList: a level
@returns: None"""
detabbed, theRest = self.blockGuru.detectTabbed(lines)
pre = self.doc.createElement('pre')
code = self.doc.createElement('code')
parent_elem.appendChild(pre)
pre.appendChild(code)
text = "\n".join(detabbed).rstrip()+"\n"
text = text.replace("&", "&")
code.appendChild(self.doc.createTextNode(text))
self._processSection(parent_elem, theRest, inList)
def _handleInlineWrapper2 (self, line) :
parts = [line]
#if not(line):
# return [self.doc.createTextNode(' ')]
for pattern in self.inlinePatterns :
#print
#print self.inlinePatterns.index(pattern)
i = 0
#print parts
while i < len(parts) :
x = parts[i]
#print i
if isinstance(x, (str, unicode)) :
result = self._applyPattern(x, pattern)
#print result
#print result
#print parts, i
if result :
i -= 1
parts.remove(x)
for y in result :
parts.insert(i+1,y)
i += 1
for i in range(len(parts)) :
x = parts[i]
if isinstance(x, (str, unicode)) :
parts[i] = self.doc.createTextNode(x)
return parts
def _handleInlineWrapper (self, line) :
# A wrapper around _handleInline to avoid recursion
parts = [line]
i = 0
while i < len(parts) :
x = parts[i]
if isinstance(x, (str, unicode)) :
parts.remove(x)
result = self._handleInline(x)
for y in result :
parts.insert(i,y)
else :
i += 1
return parts
def _handleInline(self, line):
"""Transform a Markdown line with inline elements to an XHTML
fragment.
This function uses auxiliary objects called inline patterns.
See notes on inline patterns above.
@param item: A block of Markdown text
@return: A list of NanoDom nodes """
if not(line):
return [self.doc.createTextNode(' ')]
for pattern in self.inlinePatterns :
list = self._applyPattern( line, pattern)
if list: return list
return [self.doc.createTextNode(line)]
def _applyPattern(self, line, pattern) :
""" Given a pattern name, this function checks if the line
fits the pattern, creates the necessary elements, and returns
back a list consisting of NanoDom elements and/or strings.
@param line: the text to be processed
@param pattern: the pattern to be checked
@returns: the appropriate newly created NanoDom element if the
pattern matches, None otherwise.
"""
# match the line to pattern's pre-compiled reg exp.
# if no match, move on.
m = pattern.getCompiledRegExp().match(line)
if not m :
return None
# if we got a match let the pattern make us a NanoDom node
# if it doesn't, move on
node = pattern.handleMatch(m, self.doc)
if node :
# Those are in the reverse order!
return ( m.groups()[-1], # the string to the left
node, # the new node
m.group(1)) # the string to the right of the match
else :
return None
def __str__(self):
"""Return the document in XHTML format.
@returns: A serialized XHTML body."""
#try :
doc = self._transform()
xml = doc.toxml()
#finally:
# doc.unlink()
# Let's stick in all the raw html pieces
for i in range(self.htmlStash.html_counter) :
xml = xml.replace("<p>%s\n</p>" % (HTML_PLACEHOLDER % i),
self.htmlStash.rawHtmlBlocks[i] + "\n")
xml = xml.replace(HTML_PLACEHOLDER % i,
self.htmlStash.rawHtmlBlocks[i])
xml = xml.replace(FN_BACKLINK_TEXT, "↩")
# And return everything but the top level tag
if self.stripTopLevelTags :
xml = xml.strip()[23:-7]
if isinstance(xml, unicode) :
xml = xml.encode("utf8")
return xml
toString = __str__
"""
========================= FOOTNOTES =================================
This section adds footnote handling to markdown. It can be used as
an example for extending python-markdown with relatively complex
functionality. While in this case the extension is included inside
the module itself, it could just as easily be added from outside the
module. Not that all markdown classes above are ignorant about
footnotes. All footnote functionality is provided separately and
then added to the markdown instance at the run time.
Footnote functionality is attached by calling extendMarkdown()
method of FootnoteExtension. The method also registers the
extension to allow it's state to be reset by a call to reset()
method.
"""
class FootnoteExtension :
DEF_RE = re.compile(r'(\ ?\ ?\ ?)\[\^([^\]]*)\]:\s*(.*)')
SHORT_USE_RE = re.compile(r'\[\^([^\]]*)\]', re.M) # [^a]
FN_PLACE_MARKER = "///Footnotes Go Here///"
def __init__ (self) :
self.reset()
def extendMarkdown(self, md) :
self.md = md
# Stateless extensions do not need to be registered
md.registerExtension(self)
# Insert a preprocessor before ReferencePreprocessor
index = md.preprocessors.index(REFERENCE_PREPROCESSOR)
preprocessor = FootnotePreprocessor(self)
preprocessor.md = md
md.preprocessors.insert(index, preprocessor)
# Insert an inline pattern before ImageReferencePattern
FOOTNOTE_RE = r'\[\^([^\]]*)\]' # blah blah [^1] blah
index = md.inlinePatterns.index(IMAGE_REFERENCE_PATTERN)
md.inlinePatterns.insert(index, FootnotePattern(FOOTNOTE_RE, self))
# Insert a post-processor that would actually add the footnote div
postprocessor = FootnotePostprocessor(self)
postprocessor.extension = self
md.postprocessors.append(postprocessor)
def reset(self) :
# May be called by Markdown is state reset is desired
self.footnote_suffix = "-" + str(int(random.random()*1000000000))
self.used_footnotes={}
self.footnotes = {}
def findFootnotesPlaceholder(self, doc) :
def findFootnotePlaceholderFn(node=None, indent=0):
if node.type == 'text':
if node.value.find(self.FN_PLACE_MARKER) > -1 :
return True
fn_div_list = doc.find(findFootnotePlaceholderFn)
if fn_div_list :
return fn_div_list[0]
def setFootnote(self, id, text) :
self.footnotes[id] = text
def makeFootnoteId(self, num) :
return 'fn%d%s' % (num, self.footnote_suffix)
def makeFootnoteRefId(self, num) :
return 'fnr%d%s' % (num, self.footnote_suffix)
def makeFootnotesDiv (self, doc) :
"""Creates the div with class='footnote' and populates it with
the text of the footnotes.
@returns: the footnote div as a dom element """
if not self.footnotes.keys() :
return None
div = doc.createElement("div")
div.setAttribute('class', 'footnote')
hr = doc.createElement("hr")
div.appendChild(hr)
ol = doc.createElement("ol")
div.appendChild(ol)
footnotes = [(self.used_footnotes[id], id)
for id in self.footnotes.keys()]
footnotes.sort()
for i, id in footnotes :
li = doc.createElement('li')
li.setAttribute('id', self.makeFootnoteId(i))
self.md._processSection(li, self.footnotes[id].split("\n"))
#li.appendChild(doc.createTextNode(self.footnotes[id]))
backlink = doc.createElement('a')
backlink.setAttribute('href', '#' + self.makeFootnoteRefId(i))
backlink.setAttribute('class', 'footnoteBackLink')
backlink.setAttribute('title',
'Jump back to footnote %d in the text' % 1)
backlink.appendChild(doc.createTextNode(FN_BACKLINK_TEXT))
if li.childNodes :
node = li.childNodes[-1]
if node.type == "text" :
node = li
node.appendChild(backlink)
ol.appendChild(li)
return div
class FootnotePreprocessor :
def __init__ (self, footnotes) :
self.footnotes = footnotes
def run(self, lines) :
self.blockGuru = BlockGuru()
lines = self._handleFootnoteDefinitions (lines)
# Make a hash of all footnote marks in the text so that we
# know in what order they are supposed to appear. (This
# function call doesn't really substitute anything - it's just
# a way to get a callback for each occurence.
text = "\n".join(lines)
self.footnotes.SHORT_USE_RE.sub(self.recordFootnoteUse, text)
return text.split("\n")
def recordFootnoteUse(self, match) :
id = match.group(1)
id = id.strip()
nextNum = len(self.footnotes.used_footnotes.keys()) + 1
self.footnotes.used_footnotes[id] = nextNum
def _handleFootnoteDefinitions(self, lines) :
"""Recursively finds all footnote definitions in the lines.
@param lines: a list of lines of text
@returns: a string representing the text with footnote
definitions removed """
i, id, footnote = self._findFootnoteDefinition(lines)
if id :
plain = lines[:i]
detabbed, theRest = self.blockGuru.detectTabbed(lines[i+1:])
self.footnotes.setFootnote(id,
footnote + "\n"
+ "\n".join(detabbed))
more_plain = self._handleFootnoteDefinitions(theRest)
return plain + [""] + more_plain
else :
return lines
def _findFootnoteDefinition(self, lines) :
"""Finds the first line of a footnote definition.
@param lines: a list of lines of text
@returns: the index of the line containing a footnote definition """
counter = 0
for line in lines :
m = self.footnotes.DEF_RE.match(line)
if m :
return counter, m.group(2), m.group(3)
counter += 1
return counter, None, None
class FootnotePattern (BasePattern) :
def __init__ (self, pattern, footnotes) :
BasePattern.__init__(self, pattern)
self.footnotes = footnotes
def handleMatch(self, m, doc) :
sup = doc.createElement('sup')
a = doc.createElement('a')
sup.appendChild(a)
id = m.group(2)
num = self.footnotes.used_footnotes[id]
sup.setAttribute('id', self.footnotes.makeFootnoteRefId(num))
a.setAttribute('href', '#' + self.footnotes.makeFootnoteId(num))
a.appendChild(doc.createTextNode(str(num)))
return sup
class FootnotePostprocessor :
def __init__ (self, footnotes) :
self.footnotes = footnotes
def run(self, doc) :
footnotesDiv = self.footnotes.makeFootnotesDiv(doc)
if footnotesDiv :
fnPlaceholder = self.extension.findFootnotesPlaceholder(doc)
if fnPlaceholder :
fnPlaceholder.parent.replaceChild(fnPlaceholder, footnotesDiv)
else :
doc.documentElement.appendChild(footnotesDiv)
# ====================================================================
def markdown(text) :
message(VERBOSE, "in markdown.py, received text:\n%s" % text)
return Markdown(text).toString()
def markdownWithFootnotes(text):
message(VERBOSE, "Running markdown with footnotes, "
+ "received text:\n%s" % text)
md = Markdown()
footnoteExtension = FootnoteExtension()
footnoteExtension.extendMarkdown(md)
md.source = text
return str(md)
def test_markdown(args):
"""test markdown at the command line.
in each test, arg 0 is the module name"""
print "\nTEST 1: no arguments on command line"
cmd_line(["markdown.py"])
print "\nTEST 2a: 1 argument on command line: a good option"
cmd_line(["markdown.py","-footnotes"])
print "\nTEST 2b: 1 argument on command line: a bad option"
cmd_line(["markdown.py","-foodnotes"])
print "\nTEST 3: 1 argument on command line: non-existent input file"
cmd_line(["markdown.py","junk.txt"])
print "\nTEST 4: 1 argument on command line: existing input file"
lines = """
Markdown text with[^1]:
2. **bold text**,
3. *italic text*.
Then more:
beginning of code block;
another line of code block.
a second paragraph of code block.
more text to end our file.
[^1]: "italic" means emphasis.
"""
fid = "markdown-test.txt"
f1 = open(fid, 'w+')
f1.write(lines)
f1.close()
cmd_line(["markdown.py",fid])
print "\nTEST 5: 2 arguments on command line: nofootnotes and input file"
cmd_line(["markdown.py","-nofootnotes", fid])
print "\nTEST 6: 2 arguments on command line: footnotes and input file"
cmd_line(["markdown.py","-footnotes", fid])
print "\nTEST 7: 3 arguments on command line: nofootnotes,inputfile, outputfile"
fidout = "markdown-test.html"
cmd_line(["markdown.py","-nofootnotes", fid, fidout])
def get_vars(args):
"""process the command-line args received; return usable variables"""
#firstly get the variables
message(VERBOSE, "in get_vars(), args: %s" % args)
if len(args) <= 1:
option, inFile, outFile = (None, None, None)
elif len(args) >= 4:
option, inFile, outFile = args[1:4]
elif len(args) == 3:
temp1, temp2 = args[1:3]
if temp1[0] == '-':
#then we have an option and inFile
option, inFile, outFile = temp1, temp2, None
else:
#we have no option, so we must have inFile and outFile
option, inFile, outFile = None, temp1, temp2
else:
#len(args) = 2
#we have only one usable arg: might be an option or a file
temp1 = args[1]
message(VERBOSE, "our single arg is: %s" % str(temp1))
if temp1[0] == '-':
#then we have an option
option, inFile, outFile = temp1, None, None
else:
#we have no option, so we must have inFile
option, inFile, outFile = None, temp1, None
message(VERBOSE,
"prior to validation, option: %s, inFile: %s, outFile: %s" %
(str(option), str(inFile), str(outFile),))
return option, inFile, outFile
USAGE = """
\nUsing markdown.py:
python markdown.py [option] input_file_with_markdown.txt [output_file.html]
Options:
-footnotes or -fn : generate markdown with footnotes
-test or -t : run a self-test
-help or -h : print this message
"""
VALID_OPTIONS = ['footnotes','nofootnotes', 'fn', 'test', 't', 'f',
'help', 'h']
EXPANDED_OPTIONS = { "fn" : "footnotes",
"t" : "test",
"h" : "help" }
def validate_option(option) :
""" Check if the option makes sense and print an appropriate message
if it isn't.
@return: valid option string or None
"""
#now validate the variables
if (option is not None):
if (len(option) > 1 and option[1:] in VALID_OPTIONS) :
option = option[1:]
if option in EXPANDED_OPTIONS.keys() :
option = EXPANDED_OPTIONS[option]
return option
else:
message(CRITICAL,
"\nSorry, I don't understand option %s" % option)
message(CRITICAL, USAGE)
return None
def validate_input_file(inFile) :
""" Check if the input file is specified and exists.
@return: valid input file path or None
"""
if not inFile :
message(CRITICAL,
"\nI need an input filename.\n")
message(CRITICAL, USAGE)
return None
if os.access(inFile, os.R_OK):
return inFile
else :
message(CRITICAL, "Sorry, I can't find input file %s" % str(inFile))
return None
def cmd_line(args):
message(VERBOSE, "in cmd_line with args: %s" % args)
option, inFile, outFile = get_vars(args)
if option :
option = validate_option(option)
if not option : return
if option == "help" :
message(CRITICAL, USAGE)
return
elif option == "test" :
test_markdown(None)
return
inFile = validate_input_file(inFile)
if not inFile :
return
else :
input = file(inFile).read()
message(VERBOSE, "Validated command line parameters:" +
"\n\toption: %s, \n\tinFile: %s, \n\toutFile: %s" % (
str(option), str(inFile), str(outFile),))
if option == "footnotes" :
md_function = markdownWithFootnotes
else :
md_function = markdown
if outFile is None:
print md_function(input)
else:
output = md_function(input)
f1 = open(outFile, "w+")
f1.write(output)
f1.close()
if os.access(outFile, os.F_OK):
message(INFO, "Successfully wrote %s" % outFile)
else:
message(INFO, "Failed to write %s" % outFile)
if __name__ == '__main__':
""" Run Markdown from the command line.
Set debug = 3 at top of file to get diagnostic output"""
args = sys.argv
#set testing=1 to test the command-line response of markdown.py
testing = 0
if testing:
test_markdown(args)
else:
import time
t0 = time.time()
#for x in range(10) :
cmd_line(args)
#import profile
#profile.run('cmd_line(args)', 'profile')
t1 = time.time()
#print "Time: %f - %f = %f" % (t1, t0, t1-t0)
"""
CHANGELOG
=========
May 15, 2006: A bug with lists, recursion on block-level elements,
run-in headers, spaces before headers, unicode input (thanks to Aaron
Swartz). Sourceforge tracker #s: 1489313, 1489312, 1489311, 1488370,
1485178, 1485176. (v. 1.5)
Mar. 24, 2006: Switched to a not-so-recursive algorithm with
_handleInline. (Version 1.4)
Mar. 15, 2006: Replaced some instance variables with class variables
(a patch from Stelios Xanthakis). Chris Clark's new regexps that do
not trigger midword underlining.
Feb. 28, 2006: Clean-up and command-line handling by Stewart
Midwinter. (Version 1.3)
Feb. 24, 2006: Fixed a bug with the last line of the list appearing
again as a separate paragraph. Incorporated Chris Clark's "mailto"
patch. Added support for <br /> at the end of lines ending in two or
more spaces. Fixed a crashing bug when using ImageReferencePattern.
Added several utility methods to Nanodom. (Version 1.2)
Jan. 31, 2006: Added "hr" and "hr/" to BLOCK_LEVEL_ELEMENTS and
changed <hr/> to <hr />. (Thanks to Sergej Chodarev.)
Nov. 26, 2005: Fixed a bug with certain tabbed lines inside lists
getting wrapped in <pre><code>. (v. 1.1)
Nov. 19, 2005: Made "<!...", "<?...", etc. behave like block-level
HTML tags.
Nov. 14, 2005: Added entity code and email autolink fix by Tiago
Cogumbreiro. Fixed some small issues with backticks to get 100%
compliance with John's test suite. (v. 1.0)
Nov. 7, 2005: Added an unlink method for documents to aid with memory
collection (per Doug Sauder's suggestion).
Oct. 29, 2005: Restricted a set of html tags that get treated as
block-level elements.
Sept. 18, 2005: Refactored the whole script to make it easier to
customize it and made footnote functionality into an extension.
(v. 0.9)
Sept. 5, 2005: Fixed a bug with multi-paragraph footnotes. Added
attribute support.
Sept. 1, 2005: Changed the way headers are handled to allow inline
syntax in headers (e.g. links) and got the lists to use p-tags
correctly (v. 0.8)
Aug. 29, 2005: Added flexible tabs, fixed a few small issues, added
basic support for footnotes. Got rid of xml.dom.minidom and added
pretty-printing. (v. 0.7)
Aug. 13, 2005: Fixed a number of small bugs in order to conform to the
test suite. (v. 0.6)
Aug. 11, 2005: Added support for inline html and entities, inline
images, autolinks, underscore emphasis. Cleaned up and refactored the
code, added some more comments.
Feb. 19, 2005: Rewrote the handling of high-level elements to allow
multi-line list items and all sorts of nesting.
Feb. 3, 2005: Reference-style links, single-line lists, backticks,
escape, emphasis in the beginning of the paragraph.
Nov. 2004: Added links, blockquotes, html blocks to Manfred
Stienstra's code
Apr. 2004: Manfred's version at http://www.dwerg.net/projects/markdown/
"""
# vim: set ts=4 sw=4 et: