/usr/share/pyshared/cssutils/sac.py is in python-cssutils 0.9.10-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 | #!/usr/bin/env python
"""A validating CSSParser"""
__all__ = ['CSSParser']
__docformat__ = 'restructuredtext'
__version__ = '$Id: parse.py 1754 2009-05-30 14:50:13Z cthedot $'
import helper
import codecs
import errorhandler
import os
import tokenize2
import urllib
import sys
class ErrorHandler(object):
"""Basic class for CSS error handlers.
This class class provides a default implementation ignoring warnings and
recoverable errors and throwing a SAXParseException for fatal errors.
If a CSS application needs to implement customized error handling, it must
extend this class and then register an instance with the CSS parser
using the parser's setErrorHandler method. The parser will then report all
errors and warnings through this interface.
The parser shall use this class instead of throwing an exception: it is
up to the application whether to throw an exception for different types of
errors and warnings. Note, however, that there is no requirement that the
parser continue to provide useful information after a call to fatalError
(in other words, a CSS driver class could catch an exception and report a
fatalError).
"""
def __init__(self):
self._log = errorhandler.ErrorHandler()
def error(self, exception, token=None):
self._log.error(exception, token, neverraise=True)
def fatal(self, exception, token=None):
self._log.fatal(exception, token)
def warn(self, exception, token=None):
self._log.warn(exception, token, neverraise=True)
class DocumentHandler(object):
"""
void endFontFace()
Receive notification of the end of a font face statement.
void endMedia(SACMediaList media)
Receive notification of the end of a media statement.
void endPage(java.lang.String name, java.lang.String pseudo_page)
Receive notification of the end of a media statement.
void importStyle(java.lang.String uri, SACMediaList media, java.lang.String defaultNamespaceURI)
Receive notification of a import statement in the style sheet.
void startFontFace()
Receive notification of the beginning of a font face statement.
void startMedia(SACMediaList media)
Receive notification of the beginning of a media statement.
void startPage(java.lang.String name, java.lang.String pseudo_page)
Receive notification of the beginning of a page statement.
"""
def __init__(self):
def log(msg):
sys.stderr.write('INFO\t%s\n' % msg)
self._log = log
def comment(self, text, line=None, col=None):
"Receive notification of a comment."
self._log("comment %r at [%s, %s]" % (text, line, col))
def startDocument(self, encoding):
"Receive notification of the beginning of a style sheet."
# source
self._log("startDocument encoding=%s" % encoding)
def endDocument(self, source=None, line=None, col=None):
"Receive notification of the end of a document."
self._log("endDocument EOF")
def importStyle(self, uri, media, name, line=None, col=None):
"Receive notification of a import statement in the style sheet."
# defaultNamespaceURI???
self._log("importStyle at [%s, %s]" % (line, col))
def namespaceDeclaration(self, prefix, uri, line=None, col=None):
"Receive notification of an unknown rule t-rule not supported by this parser."
# prefix might be None!
self._log("namespaceDeclaration at [%s, %s]" % (line, col))
def startSelector(self, selectors=None, line=None, col=None):
"Receive notification of the beginning of a rule statement."
# TODO selectorList!
self._log("startSelector at [%s, %s]" % (line, col))
def endSelector(self, selectors=None, line=None, col=None):
"Receive notification of the end of a rule statement."
self._log("endSelector at [%s, %s]" % (line, col))
def property(self, name, value='TODO', important=False, line=None, col=None):
"Receive notification of a declaration."
# TODO: value is LexicalValue?
self._log("property %r at [%s, %s]" % (name, line, col))
def ignorableAtRule(self, atRule, line=None, col=None):
"Receive notification of an unknown rule t-rule not supported by this parser."
self._log("ignorableAtRule %r at [%s, %s]" % (atRule, line, col))
class EchoHandler(DocumentHandler):
"Echos all input to property `out`"
def __init__(self):
super(EchoHandler, self).__init__()
self._out = []
out = property(lambda self: u''.join(self._out))
def startDocument(self, encoding):
super(EchoHandler, self).startDocument(encoding)
if u'utf-8' != encoding:
self._out.append(u'@charset "%s";\n' % encoding)
# def comment(self, text, line=None, col=None):
# self._out.append(u'/*%s*/' % text)
def importStyle(self, uri, media, name, line=None, col=None):
"Receive notification of a import statement in the style sheet."
# defaultNamespaceURI???
super(EchoHandler, self).importStyle(uri, media, name, line, col)
self._out.append(u'@import %s%s%s;\n' % (helper.string(uri),
u'%s ' % media if media else u'',
u'%s ' % name if name else u'')
)
def namespaceDeclaration(self, prefix, uri, line=None, col=None):
super(EchoHandler, self).namespaceDeclaration(prefix, uri, line, col)
self._out.append(u'@namespace %s%s;\n' % (u'%s ' % prefix if prefix else u'',
helper.string(uri)))
def startSelector(self, selectors=None, line=None, col=None):
super(EchoHandler, self).startSelector(selectors, line, col)
if selectors:
self._out.append(u', '.join(selectors))
self._out.append(u' {\n')
def endSelector(self, selectors=None, line=None, col=None):
self._out.append(u' }')
def property(self, name, value, important=False, line=None, col=None):
super(EchoHandler, self).property(name, value, line, col)
self._out.append(u' %s: %s%s;\n' % (name, value,
u' !important' if important else u''))
class Parser(object):
"""
java.lang.String getParserVersion()
Returns a string about which CSS language is supported by this parser.
boolean parsePriority(InputSource source)
Parse a CSS priority value (e.g.
LexicalUnit parsePropertyValue(InputSource source)
Parse a CSS property value.
void parseRule(InputSource source)
Parse a CSS rule.
SelectorList parseSelectors(InputSource source)
Parse a comma separated list of selectors.
void parseStyleDeclaration(InputSource source)
Parse a CSS style declaration (without '{' and '}').
void parseStyleSheet(InputSource source)
Parse a CSS document.
void parseStyleSheet(java.lang.String uri)
Parse a CSS document from a URI.
void setConditionFactory(ConditionFactory conditionFactory)
void setDocumentHandler(DocumentHandler handler)
Allow an application to register a document event handler.
void setErrorHandler(ErrorHandler handler)
Allow an application to register an error event handler.
void setLocale(java.util.Locale locale)
Allow an application to request a locale for errors and warnings.
void setSelectorFactory(SelectorFactory selectorFactory)
"""
def __init__(self, documentHandler=None, errorHandler=None):
self._tokenizer = tokenize2.Tokenizer()
if documentHandler:
self.setDocumentHandler(documentHandler)
else:
self.setDocumentHandler(DocumentHandler())
if errorHandler:
self.setErrorHandler(errorHandler)
else:
self.setErrorHandler(ErrorHandler())
def parseString(self, cssText, encoding=None):
if isinstance(cssText, str):
cssText = codecs.getdecoder('css')(cssText, encoding=encoding)[0]
tokens = self._tokenizer.tokenize(cssText, fullsheet=True)
def COMMENT(val, line, col):
self._handler.comment(val[2:-2], line, col)
def EOF(val, line, col):
self._handler.endDocument(val, line, col)
def simple(t):
map = {'COMMENT': COMMENT,
'S': lambda val, line, col: None,
'EOF': EOF}
type_, val, line, col = t
if type_ in map:
map[type_](val, line, col)
return True
else:
return False
# START PARSING
t = tokens.next()
type_, val, line, col = t
encoding = 'utf-8'
if 'CHARSET_SYM' == type_:
# @charset "encoding";
# S
encodingtoken = tokens.next()
semicolontoken = tokens.next()
if 'STRING' == type_:
encoding = helper.stringvalue(val)
# ;
if 'STRING' == encodingtoken[0] and semicolontoken:
encoding = helper.stringvalue(encodingtoken[1])
else:
self._errorHandler.fatal(u'Invalid @charset')
t = tokens.next()
type_, val, line, col = t
self._handler.startDocument(encoding)
while True:
start = (line, col)
try:
if simple(t):
pass
elif 'ATKEYWORD' == type_ or type_ in ('PAGE_SYM', 'MEDIA_SYM', 'FONT_FACE_SYM'):
atRule = [val]
braces = 0
while True:
# read till end ;
# TODO: or {}
t = tokens.next()
type_, val, line, col = t
atRule.append(val)
if u';' == val and not braces:
break
elif u'{' == val:
braces += 1
elif u'}' == val:
braces -= 1
if braces == 0:
break
self._handler.ignorableAtRule(u''.join(atRule), *start)
elif 'IMPORT_SYM' == type_:
# import URI or STRING media? name?
uri, media, name = None, None, None
while True:
t = tokens.next()
type_, val, line, col = t
if 'STRING' == type_:
uri = helper.stringvalue(val)
elif 'URI' == type_:
uri = helper.urivalue(val)
elif u';' == val:
break
if uri:
self._handler.importStyle(uri, media, name)
else:
self._errorHandler.error(u'Invalid @import'
u' declaration at %r'
% (start,))
elif 'NAMESPACE_SYM' == type_:
prefix, uri = None, None
while True:
t = tokens.next()
type_, val, line, col = t
if 'IDENT' == type_:
prefix = val
elif 'STRING' == type_:
uri = helper.stringvalue(val)
elif 'URI' == type_:
uri = helper.urivalue(val)
elif u';' == val:
break
if uri:
self._handler.namespaceDeclaration(prefix, uri, *start)
else:
self._errorHandler.error(u'Invalid @namespace'
u' declaration at %r'
% (start,))
else:
# CSSSTYLERULE
selector = []
selectors = []
while True:
# selectors[, selector]* {
if 'S' == type_:
selector.append(u' ')
elif simple(t):
pass
elif u',' == val:
selectors.append(u''.join(selector).strip())
selector = []
elif u'{' == val:
selectors.append(u''.join(selector).strip())
self._handler.startSelector(selectors, *start)
break
else:
selector.append(val)
t = tokens.next()
type_, val, line, col = t
end = None
while True:
# name: value [!important][;name: value [!important]]*;?
name, value, important = None, [], False
while True:
# name:
t = tokens.next()
type_, val, line, col = t
if 'S' == type_:
pass
elif simple(t):
pass
elif 'IDENT' == type_:
if name:
self._errorHandler.error('more than one property name', t)
else:
name = val
elif u':' == val:
if not name:
self._errorHandler.error('no property name', t)
break
elif u';' == val:
self._errorHandler.error('premature end of property', t)
end = val
break
elif u'}' == val:
if name:
self._errorHandler.error('premature end of property', t)
end = val
break
else:
self._errorHandler.error('unexpected property name token %r' % val, t)
while not u';' == end and not u'}' == end:
# value !;}
t = tokens.next()
type_, val, line, col = t
if 'S' == type_:
value.append(u' ')
elif simple(t):
pass
elif u'!' == val or u';' == val or u'}' == val:
value = ''.join(value).strip()
if not value:
self._errorHandler.error('premature end of property (no value)', t)
end = val
break
else:
value.append(val)
while u'!' == end:
# !important
t = tokens.next()
type_, val, line, col = t
if simple(t):
pass
elif u'IDENT' == type_ and not important:
important = True
elif u';' == val or u'}' == val:
end = val
break
else:
self._errorHandler.error('unexpected priority token %r' % val)
if name and value:
self._handler.property(name, value, important)
if u'}' == end:
self._handler.endSelector(selectors, line=line, col=col)
break
else:
# reset
end = None
else:
self._handler.endSelector(selectors, line=line, col=col)
t = tokens.next()
type_, val, line, col = t
except StopIteration:
break
def setDocumentHandler(self, handler):
"Allow an application to register a document event `handler`."
self._handler = handler
def setErrorHandler(self, handler):
"TODO"
self._errorHandler = handler
|