Varia's website
https://varia.zone
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.7 KiB
83 lines
2.7 KiB
4 days ago
|
"""
|
||
|
|
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).
|
||
|
|
|
||
|
|
PRE-PROCESSORS
|
||
|
|
=============================================================================
|
||
|
|
|
||
|
|
Preprocessors work on source text before we start doing anything too
|
||
|
|
complicated.
|
||
|
|
"""
|
||
|
|
|
||
|
|
from . import util
|
||
|
|
from .htmlparser import HTMLExtractor
|
||
|
|
import re
|
||
|
|
|
||
|
|
|
||
|
|
def build_preprocessors(md, **kwargs):
|
||
|
|
""" Build the default set of preprocessors used by Markdown. """
|
||
|
|
preprocessors = util.Registry()
|
||
|
|
preprocessors.register(NormalizeWhitespace(md), 'normalize_whitespace', 30)
|
||
|
|
preprocessors.register(HtmlBlockPreprocessor(md), 'html_block', 20)
|
||
|
|
return preprocessors
|
||
|
|
|
||
|
|
|
||
|
|
class Preprocessor(util.Processor):
|
||
|
|
"""
|
||
|
|
Preprocessors are run after the text is broken into lines.
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
Preprocessors must extend markdown.Preprocessor.
|
||
|
|
|
||
|
|
"""
|
||
|
|
def run(self, lines):
|
||
|
|
"""
|
||
|
|
Each subclass of Preprocessor should override the `run` method, which
|
||
|
|
takes the document as a list of strings split by newlines and returns
|
||
|
|
the (possibly modified) list of lines.
|
||
|
|
|
||
|
|
"""
|
||
|
|
pass # pragma: no cover
|
||
|
|
|
||
|
|
|
||
|
|
class NormalizeWhitespace(Preprocessor):
|
||
|
|
""" Normalize whitespace for consistent parsing. """
|
||
|
|
|
||
|
|
def run(self, lines):
|
||
|
|
source = '\n'.join(lines)
|
||
|
|
source = source.replace(util.STX, "").replace(util.ETX, "")
|
||
|
|
source = source.replace("\r\n", "\n").replace("\r", "\n") + "\n\n"
|
||
|
|
source = source.expandtabs(self.md.tab_length)
|
||
|
|
source = re.sub(r'(?<=\n) +\n', '\n', source)
|
||
|
|
return source.split('\n')
|
||
|
|
|
||
|
|
|
||
|
|
class HtmlBlockPreprocessor(Preprocessor):
|
||
|
|
"""Remove html blocks from the text and store them for later retrieval."""
|
||
|
|
|
||
|
|
def run(self, lines):
|
||
|
|
source = '\n'.join(lines)
|
||
|
|
parser = HTMLExtractor(self.md)
|
||
|
|
parser.feed(source)
|
||
|
|
parser.close()
|
||
|
|
return ''.join(parser.cleandoc).split('\n')
|