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 _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 _setCssText(self, cssText):
self._checkReadonly()
types = self._prods # rename!
funcProds = Sequence(
Prod(name='var', match=lambda t, v: t == types.FUNCTION),
PreDef.ident(toStore='ident'),
PreDef.funcEnd(stop=True),
)
# store: name of variable
store = {'ident': None}
wellformed, seq, store, unusedtokens = ProdParser().parse(
cssText, 'CSSVariable', funcProds, keepS=True)
if wellformed:
self._name = store['ident'].value
self._setSeq(seq)
self.wellformed = True
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 _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): # 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)
