def _productions(self):
"""Return definition used for parsing."""
types = self._prods # rename!
itemProd = Choice(
_ColorProd(self),
_DimensionProd(self),
_URIProd(self),
_ValueProd(self),
_CalcValueProd(self),
_CSSVariableProd(self),
_CSSFunctionProd(self),
)
funcProds = Sequence(
Prod(
name='FUNCTION',
match=lambda t, v: t == types.FUNCTION,
toSeq=lambda t, tokens: (t[0], normalize(t[1])),
),
Choice(
Sequence(
itemProd,
Sequence(PreDef.comma(optional=True),
itemProd,
minmax=lambda: (0, None)),
PreDef.funcEnd(stop=True),
),
PreDef.funcEnd(stop=True),
),
)
return funcProds
def _setCssText(self, cssText):
self._checkReadonly()
types = self._prods # rename!
_operator = Choice(
Prod(
name='Operator */',
match=lambda t, v: v in '*/',
toSeq=lambda t, tokens: (t[0], t[1]),
),
Sequence(
PreDef.S(),
Choice(
Sequence(
Prod(
name='Operator */',
match=lambda t, v: v in '*/',
toSeq=lambda t, tokens: (t[0], t[1]),
),
PreDef.S(optional=True),
),
Sequence(
Prod(
name='Operator +-',
match=lambda t, v: v in '+-',
toSeq=lambda t, tokens: (t[0], t[1]),
),
PreDef.S(),
),
PreDef.funcEnd(stop=True, mayEnd=True),
),
),
)
_operant = lambda: Choice( # noqa:E731
_DimensionProd(self), _CalcValueProd(self), _CSSVariableProd(self))
prods = Sequence(
Prod(
name='CALC',
match=lambda t, v: t == types.FUNCTION and normalize(v) ==
'calc(',
),
PreDef.S(optional=True),
_operant(),
Sequence(_operator, _operant(), minmax=lambda: (0, None)),
PreDef.funcEnd(stop=True),
)
# store: name of variable
ok, seq, store, unused = ProdParser().parse(cssText,
'CSSCalc',
prods,
checkS=True)
self.wellformed = ok
if ok:
self._setSeq(seq)
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):
self._checkReadonly()
prods = Sequence( # PreDef.unary(),
Choice(
PreDef.dimension(stop=True),
PreDef.number(stop=True),
PreDef.percentage(stop=True),
))
ok, seq, store, unused = ProdParser().parse(cssText, 'DimensionValue',
prods)
self.wellformed = ok
if ok:
item = seq[0]
sign, v, d = self.__reUnNumDim.findall(normalize(item.value))[0]
if '.' in v:
val = float(sign + v)
else:
val = int(sign + v)
dim = None
if d:
dim = d
self._sign = sign
self._value = val
self._dimension = dim
self._type = item.type
self._setSeq(seq)
def _productiondefinition(self):
"""Return defintion used for parsing."""
types = self._prods # rename!
def toSeq(t, tokens):
"Do not normalize function name!"
return t[0], t[1]
funcProds = Sequence(
Prod(name='expression',
match=lambda t, v: t == types.FUNCTION,
toSeq=toSeq),
Sequence(
Choice(
Prod(
name='nested function',
match=lambda t, v: t == self._prods.FUNCTION,
toSeq=lambda t, tokens: (
ExpressionValue._functionName,
ExpressionValue(
cssutils.helper.pushtoken(t, tokens)),
),
),
Prod(
name='part',
match=lambda t, v: v != ')',
toSeq=lambda t, tokens: (t[0], t[1]),
),
),
minmax=lambda: (0, None),
),
PreDef.funcEnd(stop=True),
)
return funcProds
def _setCssText(self, cssText):
self._checkReadonly()
types = self._prods # rename!
valueProd = Prod(
name='value',
match=lambda t, v: t in (types.NUMBER, types.PERCENTAGE),
toSeq=lambda t, v: (CSSPrimitiveValue, CSSPrimitiveValue(v)),
toStore='parts',
)
# COLOR PRODUCTION
funccolor = Sequence(
Prod(
name='FUNC',
match=lambda t, v: t == types.FUNCTION and cssutils.helper.
normalize(v) in ('rgb(', 'rgba(', 'hsl(', 'hsla('),
toSeq=lambda t, v: (t, v), # cssutils.helper.normalize(v)),
toStore='colorType',
),
PreDef.unary(),
valueProd,
# 2 or 3 more values starting with Comma
Sequence(PreDef.comma(),
PreDef.unary(),
valueProd,
minmax=lambda: (2, 3)),
PreDef.funcEnd(),
)
colorprods = Choice(
funccolor,
PreDef.hexcolor('colorType'),
Prod(
name='named color',
match=lambda t, v: t == types.IDENT,
toStore='colorType',
),
)
# store: colorType, parts
wellformed, seq, store, unusedtokens = ProdParser().parse(
cssText, 'RGBColor', colorprods, keepS=True, store={'parts': []})
if wellformed:
self.wellformed = True
if store['colorType'].type == self._prods.HASH:
self._colorType = 'HEX'
elif store['colorType'].type == self._prods.IDENT:
self._colorType = 'Named Color'
else:
self._colorType = store['colorType'].value[:-1]
# self._colorType = \
# cssutils.helper.normalize(store['colorType'].value)[:-1]
self._setSeq(seq)
def test_matches(self):
"Choice.matches()"
p1 = Prod('p1', lambda t, v: t == 1)
p2 = Prod('p2', lambda t, v: t == 2, optional=True)
t1 = (1, 0, 0, 0)
t2 = (2, 0, 0, 0)
t3 = (3, 0, 0, 0)
c = Choice(p1, p2)
self.assertEqual(True, c.matches(t1))
self.assertEqual(True, c.matches(t2))
self.assertEqual(False, c.matches(t3))
c = Choice(Sequence(p1), Sequence(p2))
self.assertEqual(True, c.matches(t1))
self.assertEqual(True, c.matches(t2))
self.assertEqual(False, c.matches(t3))
def _setCssText(self, cssText):
self._checkReadonly()
prods = Choice(
PreDef.hexcolor(stop=True),
PreDef.ident(stop=True),
PreDef.string(stop=True),
PreDef.unicode_range(stop=True),
)
ok, seq, store, unused = ProdParser().parse(cssText, 'Value', prods)
self.wellformed = ok
if ok:
# only 1 value anyway!
self._type = seq[0].type
self._value = seq[0].value
self._setSeq(seq)
def test_reset(self):
"Choice.reset()"
p1 = Prod('p1', lambda t, v: t == 1)
p2 = Prod('p2', lambda t, v: t == 2)
t1 = (1, 0, 0, 0)
t2 = (2, 0, 0, 0)
ch = Choice(p1, p2)
self.assertEqual(p1, ch.nextProd(t1))
self.assertRaises(Exhausted, ch.nextProd, t1)
ch.reset()
self.assertEqual(p2, ch.nextProd(t2))
def _productions(self):
"""Return definition used for parsing."""
types = self._prods # rename!
func = Prod(
name='MSValue-Sub',
match=lambda t, v: t == self._prods.FUNCTION,
toSeq=lambda t, tokens: (
MSValue._functionName,
MSValue(pushtoken(t, tokens), parent=self),
),
)
funcProds = Sequence(
Prod(
name='FUNCTION',
match=lambda t, v: t == types.FUNCTION,
toSeq=lambda t, tokens: (t[0], t[1]),
),
Sequence(
Choice(
_ColorProd(self),
_DimensionProd(self),
_URIProd(self),
_ValueProd(self),
_MSValueProd(self),
# _CalcValueProd(self),
_CSSVariableProd(self),
func,
# _CSSFunctionProd(self),
Prod(
name='MSValuePart',
match=lambda t, v: v != ')',
toSeq=lambda t, tokens: (t[0], t[1]),
),
),
minmax=lambda: (0, None),
),
PreDef.funcEnd(stop=True),
)
return funcProds
def _setCssText(self, cssText):
self._checkReadonly()
types = self._prods # rename!
prods = Sequence(
Prod(
name='var',
match=lambda t, v: t == types.FUNCTION and normalize(v) ==
'var(',
),
PreDef.ident(toStore='ident'),
Sequence(
PreDef.comma(),
Choice(
_ColorProd(self, toStore='fallback'),
_DimensionProd(self, toStore='fallback'),
_URIProd(self, toStore='fallback'),
_ValueProd(self, toStore='fallback'),
_CalcValueProd(self, toStore='fallback'),
_CSSVariableProd(self, toStore='fallback'),
_CSSFunctionProd(self, toStore='fallback'),
),
minmax=lambda: (0, 1),
),
PreDef.funcEnd(stop=True),
)
# store: name of variable
store = {'ident': None, 'fallback': None}
ok, seq, store, unused = ProdParser().parse(cssText, 'CSSVariable',
prods)
self.wellformed = ok
if ok:
self._name = store['ident'].value
try:
self._fallback = store['fallback'].value
except KeyError:
self._fallback = None
self._setSeq(seq)
def test_nested(self):
"Choice with nested Sequence"
p1 = Prod('p1', lambda t, v: t == 1)
p2 = Prod('p2', lambda t, v: t == 2)
s1 = Sequence(p1, p1)
s2 = Sequence(p2, p2)
t0 = (0, 0, 0, 0)
t1 = (1, 0, 0, 0)
t2 = (2, 0, 0, 0)
ch = Choice(s1, s2)
self.assertRaisesMsg(
ParseError,
'No match for (0, 0, 0, 0) in Choice(Sequence(p1, p1), Sequence(p2, p2))',
ch.nextProd,
t0,
)
self.assertEqual(s1, ch.nextProd(t1))
self.assertRaisesMsg(Exhausted, 'Extra token', ch.nextProd, t1)
ch = Choice(s1, s2)
self.assertEqual(s2, ch.nextProd(t2))
self.assertRaisesMsg(Exhausted, 'Extra token', ch.nextProd, t1)
def test_combi(self):
"ProdParser.parse() 2"
p1 = Prod('p1', lambda t, v: v == '1')
p2 = Prod('p2', lambda t, v: v == '2')
p3 = Prod('p3', lambda t, v: v == '3')
tests = {
'1 2': True,
'1 2 1 2': True,
'3': True,
# '': 'No match in Choice(Sequence(p1, p2), p3)',
'1': 'Missing token for production p2',
'1 2 1': 'Missing token for production p2',
'1 2 1 2 x': "No match: ('IDENT', 'x', 1, 9)",
'1 2 1 2 1': "No match: ('NUMBER', '1', 1, 9)",
'3 x': "No match: ('IDENT', 'x', 1, 3)",
'3 3': "No match: ('NUMBER', '3', 1, 3)",
}
for text, exp in list(tests.items()):
prods = Choice(Sequence(p1, p2, minmax=lambda: (1, 2)), p3)
if exp is True:
wellformed, seq, store, unused = ProdParser().parse(
text, 'T', prods)
self.assertEqual(wellformed, exp)
else:
self.assertRaisesMsg(
xml.dom.SyntaxErr,
'T: %s' % exp,
ProdParser().parse,
text,
'T',
prods,
)
tests = {
'1 3':
True,
'1 1 3':
True,
'2 3':
True,
'1':
'Missing token for production p3',
'1 1':
'Missing token for production p3',
'1 3 3':
"No match: ('NUMBER', '3', 1, 5)",
'1 1 3 3':
"No match: ('NUMBER', '3', 1, 7)",
'2 3 3':
"No match: ('NUMBER', '3', 1, 5)",
'2':
'Missing token for production p3',
'3':
"Missing token for production Choice(Sequence(p1), p2): "
"('NUMBER', '3', 1, 1)",
}
for text, exp in list(tests.items()):
prods = Sequence(Choice(Sequence(p1, minmax=lambda: (1, 2)), p2),
p3)
if exp is True:
wellformed, seq, store, unused = ProdParser().parse(
text, 'T', prods)
self.assertEqual(wellformed, exp)
else:
self.assertRaisesMsg(
xml.dom.SyntaxErr,
'T: %s' % exp,
ProdParser().parse,
text,
'T',
prods,
)
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
def _setMediaText(self, mediaText):
"""
:param mediaText:
a single media query string, e.g. ``print and (min-width: 25cm)``
:exceptions:
- :exc:`~xml.dom.SyntaxErr`:
Raised if the specified string value has a syntax error and is
unparsable.
- :exc:`~xml.dom.InvalidCharacterErr`:
Raised if the given mediaType is unknown.
- :exc:`~xml.dom.NoModificationAllowedErr`:
Raised if this media query is readonly.
media_query
: [ONLY | NOT]? S* media_type S* [ AND S* expression ]*
| expression [ AND S* expression ]*
;
media_type
: IDENT
;
expression
: '(' S* media_feature S* [ ':' S* expr ]? ')' S*
;
media_feature
: IDENT
;
"""
self._checkReadonly()
expression = lambda: Sequence( # noqa
PreDef.char(name='expression', char='('),
Prod(name='media_feature', match=lambda t, v: t == PreDef.types.IDENT),
Sequence(
PreDef.char(name='colon', char=':'),
cssutils.css.value.MediaQueryValueProd(self),
minmax=lambda: (0, 1), # optional
),
PreDef.char(
name='expression END', char=')', stopIfNoMoreMatch=self._partof
),
)
prods = Choice(
Sequence(
Prod(
name='ONLY|NOT', # media_query
match=lambda t, v: t == PreDef.types.IDENT
and normalize(v) in ('only', 'not'),
optional=True,
toStore='not simple',
),
Prod(
name='media_type',
match=lambda t, v: t == PreDef.types.IDENT
and normalize(v) in self.MEDIA_TYPES,
stopIfNoMoreMatch=True,
toStore='media_type',
),
Sequence(
Prod(
name='AND',
match=lambda t, v: t == PreDef.types.IDENT
and normalize(v) == 'and',
toStore='not simple',
),
expression(),
minmax=lambda: (0, None),
),
),
Sequence(
expression(),
Sequence(
Prod(
name='AND',
match=lambda t, v: t == PreDef.types.IDENT
and normalize(v) == 'and',
),
expression(),
minmax=lambda: (0, None),
),
),
)
# parse
ok, seq, store, unused = ProdParser().parse(mediaText, 'MediaQuery', prods)
self._wellformed = ok
if ok:
try:
media_type = store['media_type']
except KeyError:
pass
else:
if 'not simple' not in store:
self.mediaType = media_type.value
# TODO: filter doubles!
self._setSeq(seq)
def _setCssText(self, cssText): # noqa: C901
self._checkReadonly()
types = self._prods # rename!
component = Choice(
PreDef.unary(toSeq=lambda t, tokens: (
t[0],
DimensionValue(pushtoken(t, tokens), parent=self),
)),
PreDef.number(toSeq=lambda t, tokens: (
t[0],
DimensionValue(pushtoken(t, tokens), parent=self),
)),
PreDef.percentage(toSeq=lambda t, tokens: (
t[0],
DimensionValue(pushtoken(t, tokens), parent=self),
)),
)
noalp = Sequence(
Prod(
name='FUNCTION',
match=lambda t, v: t == types.FUNCTION and v in
('rgb(', 'hsl('),
toSeq=lambda t, tokens: (t[0], normalize(t[1])),
),
component,
Sequence(PreDef.comma(optional=True),
component,
minmax=lambda: (2, 2)),
PreDef.funcEnd(stop=True),
)
witha = Sequence(
Prod(
name='FUNCTION',
match=lambda t, v: t == types.FUNCTION and v in
('rgba(', 'hsla('),
toSeq=lambda t, tokens: (t[0], normalize(t[1])),
),
component,
Sequence(PreDef.comma(optional=True),
component,
minmax=lambda: (3, 3)),
PreDef.funcEnd(stop=True),
)
namedcolor = Prod(
name='Named Color',
match=lambda t, v: t == 'IDENT' and
(normalize(v) in list(self.COLORS.keys())),
stop=True,
)
prods = Choice(PreDef.hexcolor(stop=True), namedcolor, noalp, witha)
ok, seq, store, unused = ProdParser().parse(cssText, self.type, prods)
self.wellformed = ok
if ok:
t, v = seq[0].type, seq[0].value
if 'IDENT' == t:
rgba = self.COLORS[normalize(v)]
if 'HASH' == t:
if len(v) == 4:
# HASH #rgb
rgba = (
int(2 * v[1], 16),
int(2 * v[2], 16),
int(2 * v[3], 16),
1.0,
)
else:
# HASH #rrggbb
rgba = (int(v[1:3], 16), int(v[3:5], 16), int(v[5:7],
16), 1.0)
elif 'FUNCTION' == t:
functiontype, raw, check = None, [], ''
HSL = False
for item in seq:
try:
type_ = item.value.type
except AttributeError:
# type of function, e.g. rgb(
if item.type == 'FUNCTION':
functiontype = item.value
HSL = functiontype in ('hsl(', 'hsla(')
continue
# save components
if type_ == Value.NUMBER:
raw.append(item.value.value)
check += 'N'
elif type_ == Value.PERCENTAGE:
if HSL:
# save as percentage fraction
raw.append(item.value.value / 100.0)
else:
# save as real value of percentage of 255
raw.append(int(255 * item.value.value / 100))
check += 'P'
if HSL:
# convert to rgb
# h is 360 based (circle)
h, s, l_ = raw[0] / 360.0, raw[1], raw[2]
# ORDER h l s !!!
r, g, b = colorsys.hls_to_rgb(h, l_, s)
# back to 255 based
rgba = [
int(round(r * 255)),
int(round(g * 255)),
int(round(b * 255)),
]
if len(raw) > 3:
rgba.append(raw[3])
else:
# rgb, rgba
rgba = raw
if len(rgba) < 4:
rgba.append(1.0)
# validate
checks = {
'rgb(': ('NNN', 'PPP'),
'rgba(': ('NNNN', 'PPPN'),
'hsl(': ('NPP', ),
'hsla(': ('NPPN', ),
}
if check not in checks[functiontype]:
self._log.error('ColorValue has invalid %s) parameters: '
'%s (N=Number, P=Percentage)' %
(functiontype, check))
self._colorType = t
self._red, self._green, self._blue, self._alpha = tuple(rgba)
self._setSeq(seq)
def test_init(self):
"Choice.__init__()"
p1 = Prod('p1', lambda t, v: t == 1)
p2 = Prod('p2', lambda t, v: t == 2)
t0 = (0, 0, 0, 0)
t1 = (1, 0, 0, 0)
t2 = (2, 0, 0, 0)
ch = Choice(p1, p2)
self.assertRaisesMsg(ParseError,
'No match for (0, 0, 0, 0) in Choice(p1, p2)',
ch.nextProd, t0)
self.assertEqual(p1, ch.nextProd(t1))
self.assertRaisesMsg(Exhausted, 'Extra token', ch.nextProd, t1)
ch = Choice(p1, p2)
self.assertEqual(p2, ch.nextProd(t2))
self.assertRaisesMsg(Exhausted, 'Extra token', ch.nextProd, t2)
ch = Choice(p2, p1)
self.assertRaisesMsg(ParseError,
'No match for (0, 0, 0, 0) in Choice(p2, p1)',
ch.nextProd, t0)
self.assertEqual(p1, ch.nextProd(t1))
self.assertRaisesMsg(Exhausted, 'Extra token', ch.nextProd, t1)
ch = Choice(p2, p1)
self.assertEqual(p2, ch.nextProd(t2))
self.assertRaisesMsg(Exhausted, 'Extra token', ch.nextProd, t2)
def MediaQueryValueProd(parent):
return Choice(
_ColorProd(parent),
_DimensionProd(parent),
_ValueProd(parent),
)
def _setCssText(self, cssText):
if isinstance(cssText, (int, float)):
cssText = str(cssText) # if it is a number
"""
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(
_ColorProd(self, nextSor),
_DimensionProd(self, nextSor),
_URIProd(self, nextSor),
_ValueProd(self, nextSor),
# _Rect(self, nextSor),
# all other functions
_CSSVariableProd(self, nextSor),
_MSValueProd(self, nextSor),
_CalcValueProd(self, nextSor),
_CSSFunctionProd(self, nextSor),
)
operator = Choice(
PreDef.S(toSeq=False),
PreDef.char('comma',
',',
toSeq=lambda t, tokens: ('operator', t[1]),
optional=True),
PreDef.char('slash',
'/',
toSeq=lambda t, tokens: ('operator', t[1]),
optional=True),
optional=True,
)
prods = Sequence(
term,
Sequence( # mayEnd this Sequence if whitespace
operator,
# TODO: only when setting via other class
# used by variabledeclaration currently
PreDef.char('END', ';', stopAndKeep=True, optional=True),
# TODO: } and !important ends too!
term,
minmax=lambda: (0, None),
),
)
# parse
ok, seq, store, unused = ProdParser().parse(cssText, 'PropertyValue',
prods)
# must be at least one value!
ok = ok and len(list(self.__items(seq))) > 0
for item in seq:
if hasattr(item.value, 'wellformed') and not item.value.wellformed:
ok = False
break
self.wellformed = ok
if ok:
self._setSeq(seq)
else:
self._log.error('PropertyValue: Unknown syntax or no value: %s' %
self._valuestr(cssText))
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.
"""
super(MarginRule, self)._setCssText(cssText)
# TEMP: all style tokens are saved in store to fill styledeclaration
# TODO: resolve when all generators
styletokens = Prod(
name='styletokens',
match=lambda t, v: v != '}',
# toSeq=False,
toStore='styletokens',
storeToken=True,
)
prods = Sequence(
Prod(name='@ margin',
match=lambda t, v: t == 'ATKEYWORD' and self._normalize(v) in
MarginRule.margins,
toStore='margin'
# TODO?
# , exception=xml.dom.InvalidModificationErr
),
PreDef.char('OPEN', '{'),
Sequence(
Choice(PreDef.unknownrule(toStore='@'), styletokens),
minmax=lambda: (0, None),
),
PreDef.char('CLOSE', '}', stopAndKeep=True),
)
# parse
ok, seq, store, unused = ProdParser().parse(cssText, 'MarginRule',
prods)
if ok:
# TODO: use seq for serializing instead of fixed stuff?
self._setSeq(seq)
if 'margin' in store:
# may raise:
self.margin = store['margin'].value
else:
self._log.error(
'No margin @keyword for this %s rule' % self.margin,
error=xml.dom.InvalidModificationErr,
)
# new empty style
self.style = CSSStyleDeclaration(parentRule=self)
if 'styletokens' in store:
# may raise:
self.style.cssText = store['styletokens']