def _setCssText(self, cssText):
"""
: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.
Format::
variables
: VARIABLES_SYM S* medium [ COMMA S* medium ]* LBRACE S* variableset* '}' S*
;
variableset
: LBRACE S* vardeclaration [ ';' S* vardeclaration ]* '}' S*
;
"""
super(CSSVariablesRule, self)._setCssText(cssText)
tokenizer = self._tokenize2(cssText)
attoken = self._nexttoken(tokenizer, None)
if self._type(attoken) != self._prods.VARIABLES_SYM:
self._log.error(u'CSSVariablesRule: No CSSVariablesRule found: %s' %
self._valuestr(cssText),
error=xml.dom.InvalidModificationErr)
else:
# save if parse goes wrong
oldvariables = CSSVariablesDeclaration()
oldvariables._absorb(self.variables)
ok = True
beforetokens, brace = self._tokensupto2(tokenizer,
blockstartonly=True,
separateEnd=True)
if self._tokenvalue(brace) != u'{':
ok = False
self._log.error(
u'CSSVariablesRule: No start { of variable declaration found: %r' %
self._valuestr(cssText), brace)
# parse stuff before { which should be comments and S only
new = {'wellformed': True}
newseq = self._tempSeq()#[]
beforewellformed, expected = self._parse(expected=':',
seq=newseq, tokenizer=self._tokenize2(beforetokens),
productions={})
ok = ok and beforewellformed and new['wellformed']
variablestokens, braceorEOFtoken = self._tokensupto2(tokenizer,
blockendonly=True,
separateEnd=True)
val, typ = self._tokenvalue(braceorEOFtoken), self._type(braceorEOFtoken)
if val != u'}' and typ != 'EOF':
ok = False
self._log.error(
u'CSSVariablesRule: No "}" after variables declaration found: %r' %
self._valuestr(cssText))
nonetoken = self._nexttoken(tokenizer)
if nonetoken:
ok = False
self._log.error(u'CSSVariablesRule: Trailing content found.',
token=nonetoken)
if 'EOF' == typ:
# add again as variables needs it
variablestokens.append(braceorEOFtoken)
# may raise:
self.variables.cssText = variablestokens
if ok:
# contains probably comments only upto {
self._setSeq(newseq)
else:
# RESET
self.variables._absorb(oldvariables)
