67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
|
"""
|
||
|
|
Bypass whitespace normalization.
|
||
|
|
|
||
|
|
pymdownx._bypassnorm
|
||
|
|
|
||
|
|
Strips `SOH` and `EOT` characters before whitespace normalization
|
||
|
|
allowing other extensions to then create preprocessors that stash HTML
|
||
|
|
with `SOH` and `EOT` After whitespace normalization, all `SOH` and
|
||
|
|
`EOT` characters will be converted to the Python Markdown standard
|
||
|
|
`STX` and `ETX` convention since whitespace normalization usually
|
||
|
|
strips out the `STX` and `ETX` characters.
|
||
|
|
|
||
|
|
Copyright 2014 - 2018 Isaac Muse <isaacmuse@gmail.com>
|
||
|
|
"""
|
||
|
|
|
||
|
|
from markdown import Extension
|
||
|
|
from markdown.util import STX, ETX
|
||
|
|
from markdown.preprocessors import Preprocessor
|
||
|
|
|
||
|
|
SOH = '\u0001' # start
|
||
|
|
EOT = '\u0004' # end
|
||
|
|
|
||
|
|
|
||
|
|
class PreNormalizePreprocessor(Preprocessor):
|
||
|
|
"""Preprocessor to remove workaround symbols."""
|
||
|
|
|
||
|
|
def run(self, lines):
|
||
|
|
"""Remove workaround placeholder markers before adding actual workaround placeholders."""
|
||
|
|
|
||
|
|
source = '\n'.join(lines)
|
||
|
|
source = source.replace(SOH, '').replace(EOT, '')
|
||
|
|
return source.split('\n')
|
||
|
|
|
||
|
|
|
||
|
|
class PostNormalizePreprocessor(Preprocessor):
|
||
|
|
"""Preprocessor to clean up normalization bypass hack."""
|
||
|
|
|
||
|
|
def run(self, lines):
|
||
|
|
"""Convert alternate placeholder symbols to actual placeholder symbols."""
|
||
|
|
|
||
|
|
source = '\n'.join(lines)
|
||
|
|
source = source.replace(SOH, STX).replace(EOT, ETX)
|
||
|
|
return source.split('\n')
|
||
|
|
|
||
|
|
|
||
|
|
class BypassNormExtension(Extension):
|
||
|
|
"""Bypass whitespace normalization."""
|
||
|
|
|
||
|
|
def __init__(self, *args, **kwargs):
|
||
|
|
"""Initialize."""
|
||
|
|
|
||
|
|
self.inlinehilite = []
|
||
|
|
self.config = {}
|
||
|
|
super().__init__(*args, **kwargs)
|
||
|
|
|
||
|
|
def extendMarkdown(self, md):
|
||
|
|
"""Add extensions that help with bypassing whitespace normalization."""
|
||
|
|
|
||
|
|
md.preprocessors.register(PreNormalizePreprocessor(md), "pymdownx-pre-norm-ws", 35)
|
||
|
|
md.preprocessors.register(PostNormalizePreprocessor(md), "pymdownx-post-norm-ws", 29.9)
|
||
|
|
|
||
|
|
|
||
|
|
def makeExtension(*args, **kwargs):
|
||
|
|
"""Return extension."""
|
||
|
|
|
||
|
|
return BypassNormExtension(*args, **kwargs)
|