SickGear/lib/feedparser/sgml.py

98 lines
3.4 KiB
Python

# Copyright 2010-2022 Kurt McKee <contactme@kurtmckee.org>
# Copyright 2002-2008 Mark Pilgrim
# All rights reserved.
#
# This file is a part of feedparser.
#
# 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.
import re
import sgmllib # type: ignore[import]
__all__ = [
'sgmllib',
'charref',
'tagfind',
'attrfind',
'entityref',
'incomplete',
'interesting',
'shorttag',
'shorttagopen',
'starttagopen',
'endbracket',
]
# sgmllib defines a number of module-level regular expressions that are
# insufficient for the XML parsing feedparser needs. Rather than modify
# the variables directly in sgmllib, they're defined here using the same
# names, and the compiled code objects of several sgmllib.SGMLParser
# methods are copied into _BaseHTMLProcessor so that they execute in
# feedparser's scope instead of sgmllib's scope.
charref = re.compile(r'&#(\d+|[xX][0-9a-fA-F]+);')
tagfind = re.compile(r'[a-zA-Z][-_.:a-zA-Z0-9]*')
attrfind = re.compile(
r"""\s*([a-zA-Z_][-:.a-zA-Z_0-9]*)[$]?(\s*=\s*"""
r"""('[^']*'|"[^"]*"|[][\-a-zA-Z0-9./,:;+*%?!&$()_#=~'"@]*))?"""
)
# Unfortunately, these must be copied over to prevent NameError exceptions
entityref = sgmllib.entityref
incomplete = sgmllib.incomplete
interesting = sgmllib.interesting
shorttag = sgmllib.shorttag
shorttagopen = sgmllib.shorttagopen
starttagopen = sgmllib.starttagopen
class _EndBracketRegEx:
def __init__(self):
# Overriding the built-in sgmllib.endbracket regex allows the
# parser to find angle brackets embedded in element attributes.
self.endbracket = re.compile(
r'('
r"""[^'"<>]"""
r"""|"[^"]*"(?=>|/|\s|\w+=)"""
r"""|'[^']*'(?=>|/|\s|\w+=))*(?=[<>])"""
r"""|.*?(?=[<>]"""
r')'
)
def search(self, target, index=0):
match = self.endbracket.match(target, index)
if match is not None:
# Returning a new object in the calling thread's context
# resolves a thread-safety issue.
return EndBracketMatch(match)
return None
class EndBracketMatch:
def __init__(self, match):
self.match = match
def start(self, n):
return self.match.end(n)
endbracket = _EndBracketRegEx()