def _CSSFunctionProd(parent, nextSor=False, toStore=None):
return PreDef.function(
nextSor=nextSor,
toStore=toStore,
toSeq=lambda t, tokens: (
CSSFunction._functionName,
CSSFunction(pushtoken(t, tokens), parent=parent),
),
)
def _productiondefinition(self):
"""Return definition used for parsing."""
types = self._prods # rename!
value = Sequence(
PreDef.unary(),
Prod(
name='PrimitiveValue',
match=lambda t, v: t in (
types.DIMENSION,
types.HASH,
types.IDENT,
types.NUMBER,
types.PERCENTAGE,
types.STRING,
),
toSeq=lambda t, tokens: (t[0], CSSPrimitiveValue(t[1])),
),
)
valueOrFunc = Choice(
value,
# FUNC is actually not in spec but used in e.g. Prince
PreDef.function(toSeq=lambda t, tokens: (
'FUNCTION',
CSSFunction(cssutils.helper.pushtoken(t, tokens)),
)),
)
funcProds = Sequence(
Prod(
name='FUNC',
match=lambda t, v: t == types.FUNCTION,
toSeq=lambda t, tokens:
(t[0], cssutils.helper.normalize(t[1])),
),
Choice(
Sequence(
valueOrFunc,
# more values starting with Comma
# should use store where colorType is saved to
# define min and may, closure?
Sequence(PreDef.comma(),
valueOrFunc,
minmax=lambda: (0, None)),
PreDef.funcEnd(stop=True),
),
PreDef.funcEnd(stop=True),
),
)
return funcProds
def _setCssText(self, cssText): # noqa: C901
"""
Format::
unary_operator
: '-' | '+'
;
operator
: '/' S* | ',' S* | /* empty */
;
expr
: term [ operator term ]*
;
term
: unary_operator?
[ NUMBER S* | PERCENTAGE S* | LENGTH S* | EMS S* | EXS S* |
ANGLE S* | TIME S* | FREQ S* ]
| STRING S* | IDENT S* | URI S* | hexcolor | function
| UNICODE-RANGE S*
;
function
: FUNCTION S* expr ')' S*
;
/*
* There is a constraint on the color that it must
* have either 3 or 6 hex-digits (i.e., [0-9a-fA-F])
* after the "#"; e.g., "#000" is OK, but "#abcd" is not.
*/
hexcolor
: HASH S*
;
:exceptions:
- :exc:`~xml.dom.SyntaxErr`:
Raised if the specified CSS string value has a syntax error
(according to the attached property) or is unparsable.
- :exc:`~xml.dom.InvalidModificationErr`:
TODO: Raised if the specified CSS string value represents a
different type of values than the values allowed by the CSS
property.
- :exc:`~xml.dom.NoModificationAllowedErr`:
Raised if this value is readonly.
"""
self._checkReadonly()
# used as operator is , / or S
nextSor = ',/'
term = Choice(
Sequence(
PreDef.unary(),
Choice(
PreDef.number(nextSor=nextSor),
PreDef.percentage(nextSor=nextSor),
PreDef.dimension(nextSor=nextSor),
),
),
PreDef.string(nextSor=nextSor),
PreDef.ident(nextSor=nextSor),
PreDef.uri(nextSor=nextSor),
PreDef.hexcolor(nextSor=nextSor),
PreDef.unicode_range(nextSor=nextSor),
# special case IE only expression
Prod(
name='expression',
match=lambda t, v: t == self._prods.FUNCTION and
(cssutils.helper.normalize(v) in (
'expression(',
'alpha(',
'blur(',
'chroma(',
'dropshadow(',
'fliph(',
'flipv(',
'glow(',
'gray(',
'invert(',
'mask(',
'shadow(',
'wave(',
'xray(',
) or v.startswith('progid:DXImageTransform.Microsoft.')),
nextSor=nextSor,
toSeq=lambda t, tokens: (
ExpressionValue._functionName,
ExpressionValue(cssutils.helper.pushtoken(t, tokens),
parent=self),
),
),
# CSS Variable var(
PreDef.variable(
nextSor=nextSor,
toSeq=lambda t, tokens: (
'CSSVariable',
CSSVariable(cssutils.helper.pushtoken(t, tokens),
parent=self),
),
),
# calc(
PreDef.calc(
nextSor=nextSor,
toSeq=lambda t, tokens: (
CalcValue._functionName,
CalcValue(cssutils.helper.pushtoken(t, tokens),
parent=self),
),
),
# TODO:
# # rgb/rgba(
# Prod(name='RGBColor',
# match=lambda t, v: t == self._prods.FUNCTION and (
# cssutils.helper.normalize(v) in (u'rgb(',
# u'rgba('
# )
# ),
# nextSor=nextSor,
# toSeq=lambda t, tokens: (RGBColor._functionName,
# RGBColor(
# cssutils.helper.pushtoken(t, tokens),
# parent=self)
# )
# ),
# other functions like rgb( etc
PreDef.function(
nextSor=nextSor,
toSeq=lambda t, tokens: (
'FUNCTION',
CSSFunction(cssutils.helper.pushtoken(t, tokens),
parent=self),
),
),
)
operator = Choice(
PreDef.S(),
PreDef.char('comma',
',',
toSeq=lambda t, tokens: ('operator', t[1])),
PreDef.char('slash',
'/',
toSeq=lambda t, tokens: ('operator', t[1])),
optional=True,
)
# CSSValue PRODUCTIONS
valueprods = Sequence(
term,
Sequence(
operator, # mayEnd this Sequence if whitespace
# TODO: only when setting via other class
# used by variabledeclaration currently
PreDef.char('END', ';', stopAndKeep=True, optional=True),
term,
minmax=lambda: (0, None),
),
)
# parse
wellformed, seq, store, notused = ProdParser().parse(cssText,
'CSSValue',
valueprods,
keepS=True)
if wellformed:
# - count actual values and set firstvalue which is used later on
# - combine comma separated list, e.g. font-family to a single item
# - remove S which should be an operator but is no needed
count, firstvalue = 0, ()
newseq = self._tempSeq()
i, end = 0, len(seq)
while i < end:
item = seq[i]
if item.type == self._prods.S:
pass
elif (item.value, item.type) == (',', 'operator'):
# , separared counts as a single STRING for now
# URI or STRING value might be a single CHAR too!
newseq.appendItem(item)
count -= 1
if firstvalue:
# list of IDENTs is handled as STRING!
if firstvalue[1] == self._prods.IDENT:
firstvalue = firstvalue[0], 'STRING'
elif item.value == '/':
# / separated items count as one
newseq.appendItem(item)
elif item.value == '-' or item.value == '+':
# combine +- and following number or other
i += 1
try:
next = seq[i]
except IndexError:
firstvalue = () # raised later
break
newval = item.value + next.value
newseq.append(newval, next.type, item.line, item.col)
if not firstvalue:
firstvalue = (newval, next.type)
count += 1
elif item.type != cssutils.css.CSSComment:
newseq.appendItem(item)
if not firstvalue:
firstvalue = (item.value, item.type)
count += 1
else:
newseq.appendItem(item)
i += 1
if not firstvalue:
self._log.error('CSSValue: Unknown syntax or no value: %r.' %
self._valuestr(cssText))
else:
# ok and set
self._setSeq(newseq)
self.wellformed = wellformed
if hasattr(self, '_value'):
# only in case of CSSPrimitiveValue, else remove!
del self._value
if count == 1:
# inherit, primitive or variable
if isinstance(
firstvalue[0],
str) and 'inherit' == cssutils.helper.normalize(
firstvalue[0]):
self.__class__ = CSSValue
self._cssValueType = CSSValue.CSS_INHERIT
elif 'CSSVariable' == firstvalue[1]:
self.__class__ = CSSVariable
self._value = firstvalue
# TODO: remove major hack!
self._name = firstvalue[0]._name
else:
self.__class__ = CSSPrimitiveValue
self._value = firstvalue
elif count > 1:
# valuelist
self.__class__ = CSSValueList
# change items in list to specific type (primitive etc)
newseq = self._tempSeq()
commalist = []
nexttocommalist = False
def itemValue(item):
"Reserialized simple item.value"
if self._prods.STRING == item.type:
return cssutils.helper.string(item.value)
elif self._prods.URI == item.type:
return cssutils.helper.uri(item.value)
elif (self._prods.FUNCTION == item.type
or 'CSSVariable' == item.type):
return item.value.cssText
else:
return item.value
def saveifcommalist(commalist, newseq):
"""
saves items in commalist to seq and items
if anything in there
"""
if commalist:
newseq.replace(
-1,
CSSPrimitiveValue(cssText=''.join(commalist)),
CSSPrimitiveValue,
newseq[-1].line,
newseq[-1].col,
)
del commalist[:]
for i, item in enumerate(self._seq):
if issubclass(type(item.value), CSSValue):
# set parent of CSSValueList items to the lists
# parent
item.value.parent = self.parent
if item.type in (
self._prods.DIMENSION,
self._prods.FUNCTION,
self._prods.HASH,
self._prods.IDENT,
self._prods.NUMBER,
self._prods.PERCENTAGE,
self._prods.STRING,
self._prods.URI,
self._prods.UNICODE_RANGE,
'CSSVariable',
):
if nexttocommalist:
# wait until complete
commalist.append(itemValue(item))
else:
saveifcommalist(commalist, newseq)
# append new item
if hasattr(item.value, 'cssText'):
newseq.append(
item.value,
item.value.__class__,
item.line,
item.col,
)
else:
newseq.append(
CSSPrimitiveValue(itemValue(item)),
CSSPrimitiveValue,
item.line,
item.col,
)
nexttocommalist = False
elif ',' == item.value:
if not commalist:
# save last item to commalist
commalist.append(itemValue(self._seq[i - 1]))
commalist.append(',')
nexttocommalist = True
else:
if nexttocommalist:
commalist.append(item.value.cssText)
else:
newseq.appendItem(item)
saveifcommalist(commalist, newseq)
self._setSeq(newseq)
else:
# should not happen...
self.__class__ = CSSValue
self._cssValueType = CSSValue.CSS_CUSTOM