Current File : //usr/lib/python3/dist-packages/markdown/extensions/smarty.py
# Smarty extension for Python-Markdown
# ====================================
# Adds conversion of ASCII dashes, quotes and ellipses to their HTML
# entity equivalents.
# See https://Python-Markdown.github.io/extensions/smarty
# for documentation.
# Author: 2013, Dmitry Shachnev <mitya57@gmail.com>
# All changes Copyright 2013-2014 The Python Markdown Project
# License: [BSD](https://opensource.org/licenses/bsd-license.php)
# SmartyPants license:
# Copyright (c) 2003 John Gruber <https://daringfireball.net/>
# All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name "SmartyPants" nor the names of its contributors
# may be used to endorse or promote products derived from this
# software without specific prior written permission.
# This software is provided by the copyright holders and contributors "as
# is" and any express or implied warranties, including, but not limited
# to, the implied warranties of merchantability and fitness for a
# particular purpose are disclaimed. In no event shall the copyright
# owner or contributors be liable for any direct, indirect, incidental,
# special, exemplary, or consequential damages (including, but not
# limited to, procurement of substitute goods or services; loss of use,
# data, or profits; or business interruption) however caused and on any
# theory of liability, whether in contract, strict liability, or tort
# (including negligence or otherwise) arising in any way out of the use
# of this software, even if advised of the possibility of such damage.
# `smartypants.py` license:
# `smartypants.py` is a derivative work of SmartyPants.
# Copyright (c) 2004, 2007 Chad Miller <http://web.chad.org/>
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# This software is provided by the copyright holders and contributors "as
# is" and any express or implied warranties, including, but not limited
# to, the implied warranties of merchantability and fitness for a
# particular purpose are disclaimed. In no event shall the copyright
# owner or contributors be liable for any direct, indirect, incidental,
# special, exemplary, or consequential damages (including, but not
# limited to, procurement of substitute goods or services; loss of use,
# data, or profits; or business interruption) however caused and on any
# theory of liability, whether in contract, strict liability, or tort
# (including negligence or otherwise) arising in any way out of the use
# of this software, even if advised of the possibility of such damage.
"""
Adds conversion of ASCII dashes, quotes and ellipses to their HTML
entity equivalents.
See the [documentation](https://Python-Markdown.github.io/extensions/smarty)
for details.
"""
from __future__ import annotations
from . import Extension
from ..inlinepatterns import HtmlInlineProcessor, HTML_RE
from ..treeprocessors import InlineProcessor
from ..util import Registry
from typing import TYPE_CHECKING, Sequence
if TYPE_CHECKING: # pragma: no cover
from markdown import Markdown
from .. import inlinepatterns
import re
import xml.etree.ElementTree as etree
# Constants for quote education.
punctClass = r"""[!"#\$\%'()*+,-.\/:;<=>?\@\[\\\]\^_`{|}~]"""
endOfWordClass = r"[\s.,;:!?)]"
closeClass = r"[^\ \t\r\n\[\{\(\-\u0002\u0003]"
openingQuotesBase = (
r'(\s' # a whitespace char
r'| ' # or a non-breaking space entity
r'|--' # or dashes
r'|–|—' # or Unicode
r'|&[mn]dash;' # or named dash entities
r'|–|—' # or decimal entities
r')'
)
substitutions = {
'mdash': '—',
'ndash': '–',
'ellipsis': '…',
'left-angle-quote': '«',
'right-angle-quote': '»',
'left-single-quote': '‘',
'right-single-quote': '’',
'left-double-quote': '“',
'right-double-quote': '”',
}
# Special case if the very first character is a quote
# followed by punctuation at a non-word-break. Close the quotes by brute force:
singleQuoteStartRe = r"^'(?=%s\B)" % punctClass
doubleQuoteStartRe = r'^"(?=%s\B)' % punctClass
# Special case for double sets of quotes, e.g.:
# <p>He said, "'Quoted' words in a larger quote."</p>
doubleQuoteSetsRe = r""""'(?=\w)"""
singleQuoteSetsRe = r"""'"(?=\w)"""
# Special case for decade abbreviations (the '80s):
decadeAbbrRe = r"(?<!\w)'(?=\d{2}s)"
# Get most opening double quotes:
openingDoubleQuotesRegex = r'%s"(?=\w)' % openingQuotesBase
# Double closing quotes:
closingDoubleQuotesRegex = r'"(?=\s)'
closingDoubleQuotesRegex2 = '(?<=%s)"' % closeClass
# Get most opening single quotes:
openingSingleQuotesRegex = r"%s'(?=\w)" % openingQuotesBase
# Single closing quotes:
closingSingleQuotesRegex = r"(?<=%s)'(?!\s|s\b|\d)" % closeClass
closingSingleQuotesRegex2 = r"'(\s|s\b)"
# All remaining quotes should be opening ones
remainingSingleQuotesRegex = r"'"
remainingDoubleQuotesRegex = r'"'
HTML_STRICT_RE = HTML_RE + r'(?!\>)'
class SubstituteTextPattern(HtmlInlineProcessor):
def __init__(self, pattern: str, replace: Sequence[int | str | etree.Element], md: Markdown):
""" Replaces matches with some text. """
HtmlInlineProcessor.__init__(self, pattern)
self.replace = replace
self.md = md
def handleMatch(self, m: re.Match[str], data: str) -> tuple[str, int, int]:
result = ''
for part in self.replace:
if isinstance(part, int):
result += m.group(part)
else:
result += self.md.htmlStash.store(part)
return result, m.start(0), m.end(0)
class SmartyExtension(Extension):
""" Add Smarty to Markdown. """
def __init__(self, **kwargs):
self.config = {
'smart_quotes': [True, 'Educate quotes'],
'smart_angled_quotes': [False, 'Educate angled quotes'],
'smart_dashes': [True, 'Educate dashes'],
'smart_ellipses': [True, 'Educate ellipses'],
'substitutions': [{}, 'Overwrite default substitutions'],
}
""" Default configuration options. """
super().__init__(**kwargs)
self.substitutions: dict[str, str] = dict(substitutions)
self.substitutions.update(self.getConfig('substitutions', default={}))
def _addPatterns(
self,
md: Markdown,
patterns: Sequence[tuple[str, Sequence[int | str | etree.Element]]],
serie: str,
priority: int,
):
for ind, pattern in enumerate(patterns):
pattern += (md,)
pattern = SubstituteTextPattern(*pattern)
name = 'smarty-%s-%d' % (serie, ind)
self.inlinePatterns.register(pattern, name, priority-ind)
def educateDashes(self, md: Markdown) -> None:
emDashesPattern = SubstituteTextPattern(
r'(?<!-)---(?!-)', (self.substitutions['mdash'],), md
)
enDashesPattern = SubstituteTextPattern(
r'(?<!-)--(?!-)', (self.substitutions['ndash'],), md
)
self.inlinePatterns.register(emDashesPattern, 'smarty-em-dashes', 50)
self.inlinePatterns.register(enDashesPattern, 'smarty-en-dashes', 45)
def educateEllipses(self, md: Markdown) -> None:
ellipsesPattern = SubstituteTextPattern(
r'(?<!\.)\.{3}(?!\.)', (self.substitutions['ellipsis'],), md
)
self.inlinePatterns.register(ellipsesPattern, 'smarty-ellipses', 10)
def educateAngledQuotes(self, md: Markdown) -> None:
leftAngledQuotePattern = SubstituteTextPattern(
r'\<\<', (self.substitutions['left-angle-quote'],), md
)
rightAngledQuotePattern = SubstituteTextPattern(
r'\>\>', (self.substitutions['right-angle-quote'],), md
)
self.inlinePatterns.register(leftAngledQuotePattern, 'smarty-left-angle-quotes', 40)
self.inlinePatterns.register(rightAngledQuotePattern, 'smarty-right-angle-quotes', 35)
def educateQuotes(self, md: Markdown) -> None:
lsquo = self.substitutions['left-single-quote']
rsquo = self.substitutions['right-single-quote']
ldquo = self.substitutions['left-double-quote']
rdquo = self.substitutions['right-double-quote']
patterns = (
(singleQuoteStartRe, (rsquo,)),
(doubleQuoteStartRe, (rdquo,)),
(doubleQuoteSetsRe, (ldquo + lsquo,)),
(singleQuoteSetsRe, (lsquo + ldquo,)),
(decadeAbbrRe, (rsquo,)),
(openingSingleQuotesRegex, (1, lsquo)),
(closingSingleQuotesRegex, (rsquo,)),
(closingSingleQuotesRegex2, (rsquo, 1)),
(remainingSingleQuotesRegex, (lsquo,)),
(openingDoubleQuotesRegex, (1, ldquo)),
(closingDoubleQuotesRegex, (rdquo,)),
(closingDoubleQuotesRegex2, (rdquo,)),
(remainingDoubleQuotesRegex, (ldquo,))
)
self._addPatterns(md, patterns, 'quotes', 30)
def extendMarkdown(self, md):
configs = self.getConfigs()
self.inlinePatterns: Registry[inlinepatterns.InlineProcessor] = Registry()
if configs['smart_ellipses']:
self.educateEllipses(md)
if configs['smart_quotes']:
self.educateQuotes(md)
if configs['smart_angled_quotes']:
self.educateAngledQuotes(md)
# Override `HTML_RE` from `inlinepatterns.py` so that it does not
# process tags with duplicate closing quotes.
md.inlinePatterns.register(HtmlInlineProcessor(HTML_STRICT_RE, md), 'html', 90)
if configs['smart_dashes']:
self.educateDashes(md)
inlineProcessor = InlineProcessor(md)
inlineProcessor.inlinePatterns = self.inlinePatterns
md.treeprocessors.register(inlineProcessor, 'smarty', 2)
md.ESCAPED_CHARS.extend(['"', "'"])
def makeExtension(**kwargs): # pragma: no cover
return SmartyExtension(**kwargs)
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