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# -*- coding: utf-8 -*-
"""
Python Markdown
A Python implementation of John Gruber's Markdown.
Documentation: https://python-markdown.github.io/
GitHub: https://github.com/Python-Markdown/markdown/
PyPI: https://pypi.org/project/Markdown/
Started by Manfred Stienstra (http://www.dwerg.net/).
Maintained for a few years by Yuri Takhteyev (http://www.freewisdom.org).
Currently maintained by Waylan Limberg (https://github.com/waylan),
Dmitry Shachnev (https://github.com/mitya57) and Isaac Muse (https://github.com/facelessuser).
Copyright 2007-2018 The Python Markdown Project (v. 1.7 and later)
Copyright 2004, 2005, 2006 Yuri Takhteyev (v. 0.2-1.6b)
Copyright 2004 Manfred Stienstra (the original version)
License: BSD (see LICENSE.md for details).
POST-PROCESSORS
=============================================================================
Markdown also allows post-processors, which are similar to preprocessors in
that they need to implement a "run" method. However, they are run after core
processing.
"""
from __future__ import absolute_import
from __future__ import unicode_literals
from collections import OrderedDict
from . import util
import re
def build_postprocessors(md, **kwargs):
""" Build the default postprocessors for Markdown. """
postprocessors = util.Registry()
postprocessors.register(RawHtmlPostprocessor(md), 'raw_html', 30)
postprocessors.register(AndSubstitutePostprocessor(), 'amp_substitute', 20)
postprocessors.register(UnescapePostprocessor(), 'unescape', 10)
return postprocessors
class Postprocessor(util.Processor):
"""
Postprocessors are run after the ElementTree it converted back into text.
Each Postprocessor implements a "run" method that takes a pointer to a
text string, modifies it as necessary and returns a text string.
Postprocessors must extend markdown.Postprocessor.
"""
def run(self, text):
"""
Subclasses of Postprocessor should implement a `run` method, which
takes the html document as a single text string and returns a
(possibly modified) string.
"""
pass # pragma: no cover
class RawHtmlPostprocessor(Postprocessor):
""" Restore raw html to the document. """
def run(self, text):
""" Iterate over html stash and restore html. """
replacements = OrderedDict()
for i in range(self.md.htmlStash.html_counter):
html = self.md.htmlStash.rawHtmlBlocks[i]
if self.isblocklevel(html):
replacements["<p>%s</p>" %
(self.md.htmlStash.get_placeholder(i))] = \
html + "\n"
replacements[self.md.htmlStash.get_placeholder(i)] = html
if replacements:
pattern = re.compile("|".join(re.escape(k) for k in replacements))
text = pattern.sub(lambda m: replacements[m.group(0)], text)
return text
def isblocklevel(self, html):
m = re.match(r'^\<\/?([^ >]+)', html)
if m:
if m.group(1)[0] in ('!', '?', '@', '%'):
# Comment, php etc...
return True
return self.md.is_block_level(m.group(1))
return False
class AndSubstitutePostprocessor(Postprocessor):
""" Restore valid entities """
def run(self, text):
text = text.replace(util.AMP_SUBSTITUTE, "&")
return text
class UnescapePostprocessor(Postprocessor):
""" Restore escaped chars """
RE = re.compile(r'%s(\d+)%s' % (util.STX, util.ETX))
def unescape(self, m):
return util.int2str(int(m.group(1)))
def run(self, text):
return self.RE.sub(self.unescape, text)
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