/usr/lib/python2.7/dist-packages/cssutils/css/csscharsetrule.py is in python-cssutils 1.0.2-1.
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 | """CSSCharsetRule implements DOM Level 2 CSS CSSCharsetRule."""
__all__ = ['CSSCharsetRule']
__docformat__ = 'restructuredtext'
__version__ = '$Id$'
import codecs
import cssrule
import cssutils
import xml.dom
class CSSCharsetRule(cssrule.CSSRule):
"""
The CSSCharsetRule interface represents an @charset rule in a CSS style
sheet. The value of the encoding attribute does not affect the encoding
of text data in the DOM objects; this encoding is always UTF-16
(also in Python?). After a stylesheet is loaded, the value of the
encoding attribute is the value found in the @charset rule. If there
was no @charset in the original document, then no CSSCharsetRule is
created. The value of the encoding attribute may also be used as a hint
for the encoding used on serialization of the style sheet.
The value of the @charset rule (and therefore of the CSSCharsetRule)
may not correspond to the encoding the document actually came in;
character encoding information e.g. in an HTTP header, has priority
(see CSS document representation) but this is not reflected in the
CSSCharsetRule.
This rule is not really needed anymore as setting
:attr:`CSSStyleSheet.encoding` is much easier.
Format::
charsetrule:
CHARSET_SYM S* STRING S* ';'
BUT: Only valid format is (single space, double quotes!)::
@charset "ENCODING";
"""
def __init__(self, encoding=None, parentRule=None,
parentStyleSheet=None, readonly=False):
"""
:param encoding:
a valid character encoding
:param readonly:
defaults to False, not used yet
"""
super(CSSCharsetRule, self).__init__(parentRule=parentRule,
parentStyleSheet=parentStyleSheet)
self._atkeyword = '@charset'
if encoding:
self.encoding = encoding
else:
self._encoding = None
self._readonly = readonly
def __repr__(self):
return u"cssutils.css.%s(encoding=%r)" % (
self.__class__.__name__,
self.encoding)
def __str__(self):
return u"<cssutils.css.%s object encoding=%r at 0x%x>" % (
self.__class__.__name__,
self.encoding,
id(self))
def _getCssText(self):
"""The parsable textual representation."""
return cssutils.ser.do_CSSCharsetRule(self)
def _setCssText(self, cssText):
"""
:param cssText:
A parsable DOMString.
:exceptions:
- :exc:`~xml.dom.SyntaxErr`:
Raised if the specified CSS string value has a syntax error and
is unparsable.
- :exc:`~xml.dom.InvalidModificationErr`:
Raised if the specified CSS string value represents a different
type of rule than the current one.
- :exc:`~xml.dom.HierarchyRequestErr`:
Raised if the rule cannot be inserted at this point in the
style sheet.
- :exc:`~xml.dom.NoModificationAllowedErr`:
Raised if the rule is readonly.
"""
super(CSSCharsetRule, self)._setCssText(cssText)
wellformed = True
tokenizer = self._tokenize2(cssText)
if self._type(self._nexttoken(tokenizer)) != self._prods.CHARSET_SYM:
wellformed = False
self._log.error(u'CSSCharsetRule must start with "@charset "',
error=xml.dom.InvalidModificationErr)
encodingtoken = self._nexttoken(tokenizer)
encodingtype = self._type(encodingtoken)
encoding = self._stringtokenvalue(encodingtoken)
if self._prods.STRING != encodingtype or not encoding:
wellformed = False
self._log.error(u'CSSCharsetRule: no encoding found; %r.' %
self._valuestr(cssText))
semicolon = self._tokenvalue(self._nexttoken(tokenizer))
EOFtype = self._type(self._nexttoken(tokenizer))
if u';' != semicolon or EOFtype not in ('EOF', None):
wellformed = False
self._log.error(u'CSSCharsetRule: Syntax Error: %r.' %
self._valuestr(cssText))
if wellformed:
self.encoding = encoding
cssText = property(fget=_getCssText, fset=_setCssText,
doc=u"(DOM) The parsable textual representation.")
def _setEncoding(self, encoding):
"""
:param encoding:
a valid encoding to be used. Currently only valid Python encodings
are allowed.
:exceptions:
- :exc:`~xml.dom.NoModificationAllowedErr`:
Raised if this encoding rule is readonly.
- :exc:`~xml.dom.SyntaxErr`:
Raised if the specified encoding value has a syntax error and
is unparsable.
"""
self._checkReadonly()
tokenizer = self._tokenize2(encoding)
encodingtoken = self._nexttoken(tokenizer)
unexpected = self._nexttoken(tokenizer)
if not encodingtoken or unexpected or\
self._prods.IDENT != self._type(encodingtoken):
self._log.error(u'CSSCharsetRule: Syntax Error in encoding value '
u'%r.' % encoding)
else:
try:
codecs.lookup(encoding)
except LookupError:
self._log.error(u'CSSCharsetRule: Unknown (Python) encoding %r.'
% encoding)
else:
self._encoding = encoding.lower()
encoding = property(lambda self: self._encoding, _setEncoding,
doc=u"(DOM)The encoding information used in this @charset rule.")
type = property(lambda self: self.CHARSET_RULE,
doc=u"The type of this rule, as defined by a CSSRule "
u"type constant.")
wellformed = property(lambda self: bool(self.encoding))
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