/
parser.py
executable file
·2327 lines (2123 loc) · 83.9 KB
/
parser.py
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"""
MediaWiki-style markup
Copyright (C) 2008 David Cramer <dcramer@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
import re, random
from base64 import b64decode
import unidecode
import bleach
# a few patterns we use later
MW_COLON_STATE_TEXT = 0
MW_COLON_STATE_TAG = 1
MW_COLON_STATE_TAGSTART = 2
MW_COLON_STATE_CLOSETAG = 3
MW_COLON_STATE_TAGSLASH = 4
MW_COLON_STATE_COMMENT = 5
MW_COLON_STATE_COMMENTDASH = 6
MW_COLON_STATE_COMMENTDASHDASH = 7
_attributePat = re.compile(r'''(?:^|\s)([A-Za-z0-9]+)(?:\s*=\s*(?:\"([^<\"]*)\"|\'([^<\']*)\'|([a-zA-Z0-9!#$%&()*,\-./:;<>?@\[\]^_{|}~]+)|#([0-9a-fA-F]+)))''', re.UNICODE)
_space = re.compile(r'\s+', re.UNICODE)
_closePrePat = re.compile("</pre", re.UNICODE | re.IGNORECASE)
_openPrePat = re.compile("<pre", re.UNICODE | re.IGNORECASE)
_openMatchPat = re.compile("(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<ol|<li|</center|</tr|</td|</th)", re.UNICODE | re.IGNORECASE)
_tagPattern = re.compile(r'^(/?)(\w+)([^>]*?)(/?>)([^<]*)$', re.UNICODE)
_htmlpairs = ( # Tags that must be closed
'b', 'del', 'i', 'ins', 'u', 'font', 'big', 'small', 'sub',
'sup', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'cite', 'code',
'em', 's', 'strike', 'strong', 'tt', 'var', 'div', 'center',
'blockquote', 'ol', 'ul', 'dl', 'table', 'caption', 'pre',
'p', 'span', 'u', 'li', 'dd', 'dt', 'video', 'section', 'noscript'
)
_htmlsingle = ( # Elements that cannot have close tags
'br', 'hr', 'img', 'source',
)
_htmlnest = ( # Tags that can be nested--??
'table', 'tr', 'td', 'th', 'div', 'blockquote', 'ol', 'ul',
'dl', 'font', 'big', 'small', 'sub', 'sup', 'span', 'img',
'tbody', 'thead', 'tfoot', 'colgroup', 'col', 'section',
)
_tabletags = ( # Can only appear inside table
'td', 'th', 'tr', 'tbody', 'thead', 'tfoot', 'colgroup', 'col',
)
_htmllist = ( # Tags used by list
'ul', 'ol',
)
_listtags = ( # Tags that can appear in a list
'li',
)
_htmlsingleallowed = _htmlsingle + _tabletags
_htmlelements = _htmlsingle + _htmlpairs + _htmlnest
_htmlEntities = {
'Aacute': 193, 'aacute': 225, 'Acirc': 194, 'acirc': 226, 'acute': 180,
'AElig': 198, 'aelig': 230, 'Agrave': 192, 'agrave': 224, 'alefsym': 8501,
'Alpha': 913, 'alpha': 945, 'amp': 38, 'and': 8743, 'ang': 8736, 'Aring': 197,
'aring': 229,
'asymp': 8776,
'Atilde': 195,
'atilde': 227,
'Auml': 196,
'auml': 228,
'bdquo': 8222,
'Beta': 914,
'beta': 946,
'brvbar': 166,
'bull': 8226,
'cap': 8745,
'Ccedil': 199,
'ccedil': 231,
'cedil': 184,
'cent': 162,
'Chi': 935,
'chi': 967,
'circ': 710,
'clubs': 9827,
'cong': 8773,
'copy': 169,
'crarr': 8629,
'cup': 8746,
'curren': 164,
'dagger': 8224,
'Dagger': 8225,
'darr': 8595,
'dArr': 8659,
'deg': 176,
'Delta': 916,
'delta': 948,
'diams': 9830,
'divide': 247,
'Eacute': 201,
'eacute': 233,
'Ecirc': 202,
'ecirc': 234,
'Egrave': 200,
'egrave': 232,
'empty': 8709,
'emsp': 8195,
'ensp': 8194,
'Epsilon': 917,
'epsilon': 949,
'equiv': 8801,
'Eta': 919,
'eta': 951,
'ETH': 208,
'eth': 240,
'Euml': 203,
'euml': 235,
'euro': 8364,
'exist': 8707,
'fnof': 402,
'forall': 8704,
'frac12': 189,
'frac14': 188,
'frac34': 190,
'frasl': 8260,
'Gamma': 915,
'gamma': 947,
'ge': 8805,
'gt': 62,
'harr': 8596,
'hArr': 8660,
'hearts': 9829,
'hellip': 8230,
'Iacute': 205,
'iacute': 237,
'Icirc': 206,
'icirc': 238,
'iexcl': 161,
'Igrave': 204,
'igrave': 236,
'image': 8465,
'infin': 8734,
'int': 8747,
'Iota': 921,
'iota': 953,
'iquest': 191,
'isin': 8712,
'Iuml': 207,
'iuml': 239,
'Kappa': 922,
'kappa': 954,
'Lambda': 923,
'lambda': 955,
'lang': 9001,
'laquo': 171,
'larr': 8592,
'lArr': 8656,
'lceil': 8968,
'ldquo': 8220,
'le': 8804,
'lfloor': 8970,
'lowast': 8727,
'loz': 9674,
'lrm': 8206,
'lsaquo': 8249,
'lsquo': 8216,
'lt': 60,
'macr': 175,
'mdash': 8212,
'micro': 181,
'middot': 183,
'minus': 8722,
'Mu': 924,
'mu': 956,
'nabla': 8711,
'nbsp': 160,
'ndash': 8211,
'ne': 8800,
'ni': 8715,
'not': 172,
'notin': 8713,
'nsub': 8836,
'Ntilde': 209,
'ntilde': 241,
'Nu': 925,
'nu': 957,
'Oacute': 211,
'oacute': 243,
'Ocirc': 212,
'ocirc': 244,
'OElig': 338,
'oelig': 339,
'Ograve': 210,
'ograve': 242,
'oline': 8254,
'Omega': 937,
'omega': 969,
'Omicron': 927,
'omicron': 959,
'oplus': 8853,
'or': 8744,
'ordf': 170,
'ordm': 186,
'Oslash': 216,
'oslash': 248,
'Otilde': 213,
'otilde': 245,
'otimes': 8855,
'Ouml': 214,
'ouml': 246,
'para': 182,
'part': 8706,
'permil': 8240,
'perp': 8869,
'Phi': 934,
'phi': 966,
'Pi': 928,
'pi': 960,
'piv': 982,
'plusmn': 177,
'pound': 163,
'prime': 8242,
'Prime': 8243,
'prod': 8719,
'prop': 8733,
'Psi': 936,
'psi': 968,
'quot': 34,
'radic': 8730,
'rang': 9002,
'raquo': 187,
'rarr': 8594,
'rArr': 8658,
'rceil': 8969,
'rdquo': 8221,
'real': 8476,
'reg': 174,
'rfloor': 8971,
'Rho': 929,
'rho': 961,
'rlm': 8207,
'rsaquo': 8250,
'rsquo': 8217,
'sbquo': 8218,
'Scaron': 352,
'scaron': 353,
'sdot': 8901,
'sect': 167,
'shy': 173,
'Sigma': 931,
'sigma': 963,
'sigmaf': 962,
'sim': 8764,
'spades': 9824,
'sub': 8834,
'sube': 8838,
'sum': 8721,
'sup': 8835,
'sup1': 185,
'sup2': 178,
'sup3': 179,
'supe': 8839,
'szlig': 223,
'Tau': 932,
'tau': 964,
'there4': 8756,
'Theta': 920,
'theta': 952,
'thetasym': 977,
'thinsp': 8201,
'THORN': 222,
'thorn': 254,
'tilde': 732,
'times': 215,
'trade': 8482,
'Uacute': 218,
'uacute': 250,
'uarr': 8593,
'uArr': 8657,
'Ucirc': 219,
'ucirc': 251,
'Ugrave': 217,
'ugrave': 249,
'uml': 168,
'upsih': 978,
'Upsilon': 933,
'upsilon': 965,
'Uuml': 220,
'uuml': 252,
'weierp': 8472,
'Xi': 926,
'xi': 958,
'Yacute': 221,
'yacute': 253,
'yen': 165,
'Yuml': 376,
'yuml': 255,
'Zeta': 918,
'zeta': 950,
'zwj': 8205,
'zwnj': 8204
}
_charRefsPat = re.compile(r'''(&([A-Za-z0-9]+);|&#([0-9]+);|&#[xX]([0-9A-Za-z]+);|(&))''', re.UNICODE)
_cssCommentPat = re.compile(r'''\*.*?\*''', re.UNICODE)
_toUTFPat = re.compile(r'''\\([0-9A-Fa-f]{1,6})[\s]?''', re.UNICODE)
_hackPat = re.compile(r'''(expression|tps*://|url\s*\().*''', re.UNICODE | re.IGNORECASE)
_hrPat = re.compile('''^-----*''', re.UNICODE | re.MULTILINE)
_h1Pat = re.compile('^=(.+)=\s*$', re.UNICODE | re.MULTILINE)
_h2Pat = re.compile('^==(.+)==\s*$', re.UNICODE | re.MULTILINE)
_h3Pat = re.compile('^===(.+)===\s*$', re.UNICODE | re.MULTILINE)
_h4Pat = re.compile('^====(.+)====\s*$', re.UNICODE | re.MULTILINE)
_h5Pat = re.compile('^=====(.+)=====\s*$', re.UNICODE | re.MULTILINE)
_h6Pat = re.compile('^======(.+)======\s*$', re.UNICODE | re.MULTILINE)
_quotePat = re.compile("""(''+)""", re.UNICODE)
_removePat = re.compile(r'\b(' + r'|'.join((u"a", "an", "as", "at", "before", "but", "by", "for", "from",
"is", "in", "into", "like", "of", "off", "on", "onto", "per",
"since", "than", "the", "this", "that", "to", "up", "via",
"with")) + r')\b', re.UNICODE | re.IGNORECASE)
_nonWordSpaceDashPat = re.compile(r'[^\w\s\-\./]', re.UNICODE)
_multiSpacePat = re.compile(r'[\s\-_\./]+', re.UNICODE)
_spacePat = re.compile(r' ', re.UNICODE)
_linkPat = re.compile(r'^(?:([A-Za-z0-9]+):)?([^\|]+)(?:\|([^\n]+?))?\]\](.*)$', re.UNICODE | re.DOTALL)
_bracketedLinkPat = re.compile(r'(?:\[((?:mailto:|git://|irc://|https?://|ftp://|/)[^<>\]\[' + "\x00-\x20\x7f" + r']*)\s*(.*?)\])', re.UNICODE)
_internalLinkPat = re.compile(r'\[\[(?:(:?[^:\]]*?):\s*)?(.*?)\]\]')
_internalTemplatePat = re.compile(r'\{\{(?:(:?[^:\]]*?)\|\s*)?(.*?)\}\}', re.UNICODE | re.DOTALL | re.MULTILINE)
_protocolPat = re.compile(r'(\b(?:mailto:|irc://|https?://|ftp://))', re.UNICODE)
_specialUrlPat = re.compile(r'^([^<>\]\[' + "\x00-\x20\x7f" + r']+)(.*)$', re.UNICODE)
_protocolsPat = re.compile(r'^(mailto:|irc://|https?://|ftp://)$', re.UNICODE)
_controlCharsPat = re.compile(r'[\]\[<>"' + "\\x00-\\x20\\x7F" + r']]', re.UNICODE)
_hostnamePat = re.compile(r'^([^:]+:)(//[^/]+)?(.*)$', re.UNICODE)
_stripPat = re.compile('\\s|\u00ad|\u1806|\u200b|\u2060|\ufeff|\u03f4|\u034f|\u180b|\u180c|\u180d|\u200c|\u200d|[\ufe00-\ufe0f]', re.UNICODE)
_zomgPat = re.compile(r'^(:*)\{\|(.*)$', re.UNICODE)
_headerPat = re.compile(r"<[Hh]([1-6])(.*?)>(.*?)</[Hh][1-6] *>", re.UNICODE)
_templateSectionPat = re.compile(r"<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->", re.UNICODE)
_tagPat = re.compile(r"<.*?>", re.UNICODE)
_startRegexHash = {}
_endRegexHash = {}
_endCommentPat = re.compile(r'(-->)', re.UNICODE)
_extractTagsAndParams_n = 1
_guillemetLeftPat = re.compile(r'(.) (\?|:|;|!|\302\273)', re.UNICODE)
_guillemetRightPat = re.compile(r'(\302\253) ', re.UNICODE)
def setupAttributeWhitelist():
common = ( 'id', 'class', 'lang', 'dir', 'title', 'style' )
block = common + ('align',)
tablealign = ( 'align', 'char', 'charoff', 'valign' )
tablecell = ( 'abbr',
'axis',
'headers',
'scope',
'rowspan',
'colspan',
'nowrap', # deprecated
'width', # deprecated
'height', # deprecated
'bgcolor' # deprecated
)
return {
'div': block,
'center': common, # deprecated
'span': block, # ??
'h1': block,
'h2': block,
'h3': block,
'h4': block,
'h5': block,
'h6': block,
'em': common,
'strong': common,
'cite': common,
'code': common,
'var': common,
'img': common + ('src', 'alt', 'width', 'height',),
'blockquote': common + ('cite',),
'sub': common,
'sup': common,
'p': block,
'br': ('id', 'class', 'title', 'style', 'clear',),
'pre': common + ('width',),
'ins': common + ('cite', 'datetime'),
'del': common + ('cite', 'datetime'),
'ul': common + ('type',),
'ol': common + ('type', 'start'),
'li': common + ('type', 'value'),
'dl': common,
'dd': common,
'dt': common,
'table': common + ( 'summary', 'width', 'border', 'frame',
'rules', 'cellspacing', 'cellpadding',
'align', 'bgcolor',
),
'caption': common + ('align',),
'thead': common + tablealign,
'tfoot': common + tablealign,
'tbody': common + tablealign,
'colgroup': common + ( 'span', 'width' ) + tablealign,
'col': common + ( 'span', 'width' ) + tablealign,
'tr': common + ( 'bgcolor', ) + tablealign,
'td': common + tablecell + tablealign,
'th': common + tablecell + tablealign,
'tt': common,
'b': common,
'i': common,
'big': common,
'small': common,
'strike': common,
's': common,
'u': common,
'font': common + ( 'size', 'color', 'face' ),
'hr': common + ( 'noshade', 'size', 'width' ),
'video': common + ( 'width', 'height', 'controls' ),
'source': common + ( 'src', 'type' ),
}
_whitelist = setupAttributeWhitelist()
_page_cache = {}
# Used for bleach, list of allowed tags
ALLOWED_TAGS = list(_htmlelements + ('a',))
ALLOWED_ATTRIBUTES = {
'a': ['href', 'title', 'rel'],
'div': ['id'],
'h1': ['id'],
'h2': ['id'],
'h3': ['id'],
'h4': ['id'],
'h5': ['id'],
'h6': ['id'],
'li': ['class'],
'span': ['class'],
}
class BaseParser(object):
def __init__(self):
self.uniq_prefix = "\x07UNIQ" + str(random.randint(1, 1000000000))
self.strip_state = {}
self.arg_stack = []
# tag hooks
self.tagHooks = {}
# [[internal link]] hooks
self.internalLinkHooks = {}
# [[internal temlate]] hooks
self.internalTemplateHooks = {}
def registerTagHook(self, tag, function):
self.tagHooks[tag] = function
def registerInternalLinkHook(self, tag, function):
"""
Register a hook called for [[internal links]]. There is no default
handling for internal links.
def internalLinkHook(parser_env, namespace, body):
...
return replacement
parser.registerInternalLinkHook(None, internalLinkHook) # called for [[link]]
parser.registerInternalLinkHook('Wikipedia', internalLinkHook) # called for [[Wikipedia:link]]
parser.registerInternalLinkHook(':en', internalLinkHook) # called for [[:en:link]]
parser.registerInternalLinkHook(':', internalLinkHook) # called for [[:any:link]] not hooked above
parser.registerInternalLinkHook('*', internalLinkHook) # called for [[anything]] not hooked above
"""
self.internalLinkHooks[tag] = function
def registerInternalTemplateHook(self, tag, function):
self.internalTemplateHooks[tag] = function
def parse(self, text):
if not isinstance(text, str):
raise Exception('Argument must be string type')
if text[-1:] != '\n':
text = text + '\n'
taggedNewline = True
else:
taggedNewline = False
text = self.strip(text)
text = self.removeHtmlTags(text)
text = self.parseHorizontalRule(text)
text = self.parseAllQuotes(text)
text = self.replaceExternalLinks(text)
text = self.replaceInternalLinks(text)
text = self.replaceInternalTemplates(text)
text = self.unstrip(text)
text = self.fixtags(text)
text = self.doBlockLevels(text, True)
text = self.unstripNoWiki(text)
text = text.split('\n')
text = '\n'.join(text)
if taggedNewline and text[-1:] == '\n':
text = text[:-1]
return text
def strip(self, text, stripcomments=False, dontstrip=[]):
render = True
commentState = {}
elements = ['nowiki',] + list(self.tagHooks.keys())
if True: #wgRawHtml
elements.append('html')
# Removing $dontstrip tags from $elements list (currently only 'gallery', fixing bug 2700)
for k in dontstrip:
if k in elements:
del elements[k]
matches = {}
text = self.extractTagsAndParams(elements, text, matches)
for marker in matches:
element, content, params, tag = matches[marker]
if render:
tagName = element.lower()
if tagName == '!--':
# comment
output = tag
if tag[-3:] != '-->':
output += "-->"
elif tagName == 'html':
output = content
elif tagName == 'nowiki':
output = content.replace('&', '&').replace('<', '<').replace('>', '>')
else:
if tagName in self.tagHooks:
output = self.tagHooks[tagName](self, content, params)
else:
output = content.replace('&', '&').replace('<', '<').replace('>', '>')
else:
# Just stripping tags; keep the source
output = tag
# Unstrip the output, because unstrip() is no longer recursive so
# it won't do it itself
output = self.unstrip(output)
if not stripcomments and element == '!--':
commentState[marker] = output
elif element == 'html' or element == 'nowiki':
if 'nowiki' not in self.strip_state:
self.strip_state['nowiki'] = {}
self.strip_state['nowiki'][marker] = output
else:
if 'general' not in self.strip_state:
self.strip_state['general'] = {}
self.strip_state['general'][marker] = output
# Unstrip comments unless explicitly told otherwise.
# (The comments are always stripped prior to this point, so as to
# not invoke any extension tags / parser hooks contained within
# a comment.)
if not stripcomments:
# Put them all back and forget them
for k in commentState:
v = commentState[k]
text = text.replace(k, v)
return text
def removeHtmlTags(self, text):
"""convert bad tags into HTML identities"""
sb = []
bits = text.split('<')
sb.append(bits.pop(0))
tagstack = []
tablestack = tagstack
for x in bits:
m = _tagPattern.match(x)
if not m:
# If it isn't a tag, leave it in place and move on
sb.append('<%s' % x)
continue
slash, t, params, brace, rest = m.groups()
t = t.lower()
badtag = False
if t in _htmlelements:
# Check our stack
if slash:
# Closing a tag...
if t in _htmlsingle or len(tagstack) == 0:
badtag = True
else:
ot = tagstack.pop()
if ot != t:
if ot in _htmlsingleallowed:
# Pop all elements with an optional close tag
# and see if we find a match below them
optstack = []
optstack.append(ot)
while True:
if len(tagstack) == 0:
break
ot = tagstack.pop()
if ot == t or ot not in _htmlsingleallowed:
break
optstack.append(ot)
if t != ot:
# No match. Push the optinal elements back again
badtag = True
tagstack += reversed(optstack)
else:
tagstack.append(ot)
# <li> can be nested in <ul> or <ol>, skip those cases:
if ot not in _htmllist and t in _listtags:
badtag = True
elif t == 'table':
if len(tablestack) == 0:
bagtag = True
else:
tagstack = tablestack.pop()
newparams = ''
else:
# Keep track for later
if t in _tabletags and 'table' not in tagstack:
badtag = True
elif t in tagstack and t not in _htmlnest:
badtag = True
# Is it a self-closed htmlpair? (bug 5487)
elif brace == '/>' and t in _htmlpairs:
badTag = True
elif t in _htmlsingle:
# Hack to force empty tag for uncloseable elements
brace = '/>'
else:
if t == 'table':
tablestack.append(tagstack)
tagstack = []
tagstack.append(t)
newparams = self.fixTagAttributes(params, t)
if not badtag:
rest = rest.replace('>', u'>')
if brace == '/>':
close = ' /'
else:
close = ''
sb.append('<')
sb.append(slash)
sb.append(t)
sb.append(newparams)
sb.append(close)
sb.append('>')
sb.append(rest)
continue
sb.append('<')
sb.append(x.replace('>', '>'))
# Close off any remaining tags
while tagstack:
t = tagstack.pop()
sb.append('</')
sb.append(t)
sb.append('>\n')
if t == 'table':
if not tablestack:
break
tagstack = tablestack.pop()
return ''.join(sb)
def removeHtmlComments(self, text):
"""remove <!-- text --> comments from given text"""
sb = []
start = text.find('<!--')
last = 0
while start != -1:
end = text.find('-->', start)
if end == -1:
break
end += 3
spaceStart = max(0, start-1)
spaceEnd = end
while text[spaceStart] == ' ' and spaceStart > 0:
spaceStart -= 1
while text[spaceEnd] == ' ':
spaceEnd += 1
if text[spaceStart] == '\n' and text[spaceEnd] == '\n':
sb.append(text[last:spaceStart])
sb.append('\n')
last = spaceEnd+1
else:
sb.append(text[last:spaceStart+1])
last = spaceEnd
start = text.find('<!--', end)
sb.append(text[last:])
return ''.join(sb)
def decodeTagAttributes(self, text):
"""docstring for decodeTagAttributes"""
attribs = {}
if text.strip() == '':
return attribs
scanner = _attributePat.scanner(text)
match = scanner.search()
while match:
key, val1, val2, val3, val4 = match.groups()
value = val1 or val2 or val3 or val4
if value:
value = _space.sub(' ', value).strip()
else:
value = ''
attribs[key] = self.decodeCharReferences(value)
match = scanner.search()
return attribs
def validateTagAttributes(self, attribs, element):
"""docstring for validateTagAttributes"""
out = {}
if element not in _whitelist:
return out
whitelist = _whitelist[element]
for attribute in attribs:
value = attribs[attribute]
if attribute not in whitelist:
continue
# Strip javascript "expression" from stylesheets.
# http://msdn.microsoft.com/workshop/author/dhtml/overview/recalc.asp
if attribute == 'style':
value = self.checkCss(value)
if value is False:
continue
elif attribute == 'id':
value = self.escapeId(value)
# If this attribute was previously set, override it.
# Output should only have one attribute of each name.
out[attribute] = value
return out
def safeEncodeAttribute(self, encValue):
"""docstring for safeEncodeAttribute"""
encValue = encValue.replace('&', '&')
encValue = encValue.replace('<', '<')
encValue = encValue.replace('>', '>')
encValue = encValue.replace('"', '"')
encValue = encValue.replace('{', '{')
encValue = encValue.replace('[', '[')
encValue = encValue.replace("''", '''')
encValue = encValue.replace('ISBN', 'ISBN')
encValue = encValue.replace('RFC', 'RFC')
encValue = encValue.replace('PMID', 'PMID')
encValue = encValue.replace('|', '|')
encValue = encValue.replace('__', '__')
encValue = encValue.replace('\n', ' ')
encValue = encValue.replace('\r', ' ')
encValue = encValue.replace('\t', '	')
return encValue
def fixTagAttributes(self, text, element):
if text.strip() == '':
return ''
stripped = self.validateTagAttributes(self.decodeTagAttributes(text), element)
sb = []
for attribute in stripped:
value = stripped[attribute]
encAttribute = attribute.replace('&', '&').replace('<', u'<').replace('>', u'>')
encValue = self.safeEncodeAttribute(value)
sb.append(' ')
sb.append(encAttribute)
sb.append('="')
sb.append(encValue)
sb.append('"')
return ''.join(sb)
def validateCodepoint(self, codepoint):
return codepoint in (0x09, 0x0a, 0x0d) \
or (0x20 <= codepoint <= 0xd7ff) \
or (0xe000 <= codepoint <= 0xfffd) \
or (0x10000 <= codepoint <= 0x10ffff)
def _normalizeCallback(self, match):
text, norm, dec, hexval, _ = match.groups()
if norm:
sb = []
sb.append('&')
if norm not in _htmlEntities:
sb.append('amp;')
sb.append(norm)
sb.append(';')
return ''.join(sb)
elif dec:
dec = int(dec)
if self.validateCodepoint(dec):
sb = []
sb.append('&#')
sb.append(dec)
sb.append(';')
return ''.join(sb)
elif hexval:
hexval = int(hexval, 16)
if self.validateCodepoint(hexval):
sb = []
sb.append('&#x')
sb.append(hex(hexval))
sb.append(';')
return ''.join(sb)
return text.replace('&', '&').replace('<', '<').replace('>', '>')
def normalizeCharReferences(self, text):
"""docstring for normalizeCharReferences"""
return _charRefsPat.sub(self._normalizeCallback, text)
def _decodeCallback(self, match):
text, norm, dec, hexval, _ = match.groups()
if norm:
if norm in _htmlEntities:
return chr(_htmlEntities[norm])
else:
return ''.join(["&", norm, ";"])
elif dec:
dec = int(dec)
if self.validateCodepoint(dec):
return chr(dec)
return '?'
elif hexval:
if self.validateCodepoint(dec):
return chr(dec)
return '?'
return text
def decodeCharReferences(self, text):
"""docstring for decodeCharReferences"""
if text:
return _charRefsPat.sub(self._decodeCallback, text)
return ''
def _convertToUtf8(self, s):
return chr(int(s.group(1), 16))
def checkCss(self, value):
"""docstring for checkCss"""
stripped = self.decodeCharReferences(value)
stripped = _cssCommentPat.sub('', stripped)
value = stripped
stripped = _toUTFPat.sub(self._convertToUtf8, stripped)
stripped.replace('\\', '')
if _hackPat.search(stripped):
# someone is haxx0ring
return False
return value
def escapeId(self, value):
"""docstring for escapeId"""
# TODO
return safe_name(value)
def parseHorizontalRule(self, text):
return _hrPat.sub(r'<hr />', text)
def parseHeaders(self, text):
text = _h6Pat.sub(r'<h6>\1</h6>', text)
text = _h5Pat.sub(r'<h5>\1</h5>', text)
text = _h4Pat.sub(r'<h4>\1</h4>', text)
text = _h3Pat.sub(r'<h3>\1</h3>', text)
text = _h2Pat.sub(r'<h2>\1</h2>', text)
text = _h1Pat.sub(r'<h1>\1</h1>', text)
return text
def parseQuotes(self, text):
arr = _quotePat.split(text)
if len(arr) == 1:
return text
# First, do some preliminary work. This may shift some apostrophes from
# being mark-up to being text. It also counts the number of occurrences
# of bold and italics mark-ups.
numBold = 0
numItalics = 0
for i,r in zip(range(len(arr)), arr):
if i%2 == 1:
l = len(r)
if l == 4:
arr[i-1] += "'"
arr[i] = "'''"
elif l > 5:
arr[i-1] += "'" * (len(arr[i]) - 5)
arr[i] = "'''''"
if l == 2:
numItalics += 1
elif l >= 5:
numItalics += 1
numBold += 1
else:
numBold += 1
# If there is an odd number of both bold and italics, it is likely
# that one of the bold ones was meant to be an apostrophe followed
# by italics. Which one we cannot know for certain, but it is more
# likely to be one that has a single-letter word before it.
if numBold%2 == 1 and numItalics%2 == 1:
firstSingleLetterWord = -1
firstMultiLetterWord = -1
firstSpace = -1
for i,r in zip(range(len(arr)), arr):
if i%2 == 1 and len(r) == 3:
x1 = arr[i-1][-1:]
x2 = arr[i-1][-2:-1]
if x1 == ' ':
if firstSpace == -1:
firstSpace = i
elif x2 == ' ':
if firstSingleLetterWord == -1:
firstSingleLetterWord = i
else:
if firstMultiLetterWord == -1:
firstMultiLetterWord = i
# If there is a single-letter word, use it!
if firstSingleLetterWord > -1:
arr[firstSingleLetterWord] = "''"
arr[firstSingleLetterWord-1] += "'"
# If not, but there's a multi-letter word, use that one.
elif firstMultiLetterWord > -1:
arr[firstMultiLetterWord] = "''"
arr[firstMultiLetterWord-1] += "'"
# ... otherwise use the first one that has neither.
# (notice that it is possible for all three to be -1 if, for example,
# there is only one pentuple-apostrophe in the line)
elif firstSpace > -1:
arr[firstSpace] = "''"
arr[firstSpace-1] += "'"
# Now let's actually convert our apostrophic mush to HTML!
output = []
buffer = None
state = ''
for i,r in zip(range(len(arr)), arr):
if i%2 == 0:
if state == 'both':
buffer.append(r)
else:
output.append(r)
else:
if len(r) == 2:
if state == 'i':
output.append("</em>")
state = ''
elif state == 'bi':
output.append("</em>")
state = 'b'
elif state == 'ib':
output.append("</strong></em><strong>")
state = 'b'
elif state == 'both':
output.append("<strong><em>")
output.append(''.join(buffer))
buffer = None
output.append("</em>")
state = 'b'
elif state == 'b':
output.append("<em>")
state = 'bi'
else: # ''
output.append("<em>")
state = 'i'
elif len(r) == 3:
if state == 'b':
output.append("</strong>")
state = ''
elif state == 'bi':
output.append("</em></strong><em>")
state = 'i'
elif state == 'ib':
output.append("</strong>")
state = 'i'
elif state == 'both':
output.append("<em><strong>")
output.append(''.join(buffer))
buffer = None
output.append("</strong>")
state = 'i'
elif state == 'i':
output.append("<strong>")
state = 'ib'
else: # ''
output.append("<strong>")
state = 'b'
elif len(r) == 5:
if state == 'b':
output.append("</strong><em>")
state = 'i'
elif state == 'i':
output.append("</em><strong>")
state = 'b'
elif state == 'bi':
output.append("</em></strong>")