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# Copyright (C) 2002-2004 TechGame Networks, LLC.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the BSD style License as found in the
# LICENSE file included with this distribution.
#
# Modified by Dirk Holtwick <holtwick@web.de>, 2007-2008
"""
CSS-2.1 engine
Primary classes:
* CSSElementInterfaceAbstract
Provide a concrete implementation for the XML element model used.
* CSSCascadeStrategy
Implements the CSS-2.1 engine's attribute lookup rules.
* CSSParser
Parses CSS source forms into usable results using CSSBuilder and
CSSMutableSelector. You may want to override parseExternal()
* CSSBuilder (and CSSMutableSelector)
A concrete implementation for cssParser.CSSBuilderAbstract (and
cssParser.CSSSelectorAbstract) to provide usable results to
CSSParser requests.
Dependencies:
sets, cssParser, re (via cssParser)
"""
# ruff: noqa: N802, N803, N815
from __future__ import annotations
import copy
from abc import abstractmethod
from pathlib import Path
from typing import ClassVar
from xhtml2pdf.w3c import cssParser, cssSpecial
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ To replace any for with list comprehension
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def stopIter(value):
raise StopIteration(*value)
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ Constants / Variables / Etc.
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CSSParseError = cssParser.CSSParseError
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ Definitions
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSElementInterfaceAbstract:
@abstractmethod
def getAttr(self, name, default=NotImplemented):
raise NotImplementedError
def getIdAttr(self):
return self.getAttr("id", "")
def getClassAttr(self):
return self.getAttr("class", "")
@abstractmethod
def getInlineStyle(self):
raise NotImplementedError
@abstractmethod
def matchesNode(self):
raise NotImplementedError
@abstractmethod
def inPseudoState(self, name, params=()):
raise NotImplementedError
@abstractmethod
def iterXMLParents(self):
"""Results must be compatible with CSSElementInterfaceAbstract."""
raise NotImplementedError
@abstractmethod
def getPreviousSibling(self):
raise NotImplementedError
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSCascadeStrategy:
author = None
user = None
userAgenr = None
def __init__(self, author=None, user=None, userAgent=None) -> None:
if author is not None:
self.author = author
if user is not None:
self.user = user
if userAgent is not None:
self.userAgenr = userAgent
def copyWithUpdate(self, author=None, user=None, userAgent=None):
if author is None:
author = self.author
if user is None:
user = self.user
if userAgent is None:
userAgent = self.userAgenr
return type(self)(author, user, userAgent)
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def iterCSSRulesets(self, inline=None):
if self.userAgenr is not None:
yield self.userAgenr[0]
yield self.userAgenr[1]
if self.user is not None:
yield self.user[0]
if self.author is not None:
yield self.author[0]
yield self.author[1]
if inline:
yield inline[0]
yield inline[1]
if self.user is not None:
yield self.user[1]
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def findStyleFor(self, element, attrName, default=NotImplemented):
"""
Attempts to find the style setting for attrName in the CSSRulesets.
Note: This method does not attempt to resolve rules that return
"inherited", "default", or values that have units (including "%").
This is left up to the client app to re-query the CSS in order to
implement these semantics.
"""
rule = self.findCSSRulesFor(element, attrName)
return self._extractStyleForRule(rule, attrName, default)
def findStylesForEach(self, element, attrNames, default=NotImplemented):
"""
Attempts to find the style setting for attrName in the CSSRulesets.
Note: This method does not attempt to resolve rules that return
"inherited", "default", or values that have units (including "%").
This is left up to the client app to re-query the CSS in order to
implement these semantics.
"""
rules = self.findCSSRulesForEach(element, attrNames)
return [
(attrName, self._extractStyleForRule(rule, attrName, default))
for attrName, rule in rules.items()
]
def findCSSRulesFor(self, element, attrName):
rules = []
inline = element.getInlineStyle()
# Generator are wonderful but sometime slow...
# for ruleset in self.iterCSSRulesets(inline):
# rules += ruleset.findCSSRuleFor(element, attrName)
if self.userAgenr is not None:
rules += self.userAgenr[0].findCSSRuleFor(element, attrName)
rules += self.userAgenr[1].findCSSRuleFor(element, attrName)
if self.user is not None:
rules += self.user[0].findCSSRuleFor(element, attrName)
if self.author is not None:
rules += self.author[0].findCSSRuleFor(element, attrName)
rules += self.author[1].findCSSRuleFor(element, attrName)
if inline:
rules += inline[0].findCSSRuleFor(element, attrName)
rules += inline[1].findCSSRuleFor(element, attrName)
if self.user is not None:
rules += self.user[1].findCSSRuleFor(element, attrName)
rules.sort()
return rules
def findCSSRulesForEach(self, element, attrNames):
rules = {name: [] for name in attrNames}
inline = element.getInlineStyle()
for ruleset in self.iterCSSRulesets(inline):
for attrName, attrRules in rules.items():
attrRules += ruleset.findCSSRuleFor(element, attrName)
for attrRules in rules.items():
attrRules.sort()
return rules
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@staticmethod
def _extractStyleForRule(rule, attrName, default=NotImplemented):
if rule:
# rule is packed in a list to differentiate from "no rule" vs "rule
# whose value evaluates as False"
style = rule[-1][1]
return style[attrName]
if default is not NotImplemented:
return default
msg = f"Could not find style for '{attrName}' in {rule!r}"
raise LookupError(msg)
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ CSS Selectors
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSSelectorBase:
inline = False
_hash = None
_specificity = None
def __init__(self, completeName="*") -> None:
if not isinstance(completeName, tuple):
completeName = (None, "*", completeName)
self.completeName = completeName
def _updateHash(self):
self._hash = hash((self.fullName, self.specificity(), self.qualifiers))
def __hash__(self):
if self._hash is None:
return object.__hash__(self)
return self._hash
@property
def nsPrefix(self):
return self.completeName[0]
@property
def name(self):
return self.completeName[2]
@property
def namespace(self):
return self.completeName[1]
@property
def fullName(self):
return self.completeName[1:3]
def __repr__(self) -> str:
strArgs = (type(self).__name__, *self.specificity(), self.asString())
return "<%s %d:%d:%d:%d %s >" % strArgs
def __str__(self) -> str:
return self.asString()
def _as_comparison_key(self):
return (self.specificity(), self.fullName, self.qualifiers)
def __eq__(self, other):
return self._as_comparison_key() == other._as_comparison_key()
def __lt__(self, other):
return self._as_comparison_key() < other._as_comparison_key()
def specificity(self):
if self._specificity is None:
self._specificity = self._calcSpecificity()
return self._specificity
def _calcSpecificity(self):
"""From http://www.w3.org/TR/CSS21/cascade.html#specificity."""
hashCount = 0
qualifierCount = 0
elementCount = int(self.name != "*")
for qualifier in self.qualifiers:
if qualifier.isHash():
hashCount += 1
elif qualifier.isClass() or qualifier.isAttr():
qualifierCount += 1
elif qualifier.isPseudo():
elementCount += 1
elif qualifier.isCombiner():
i, h, q, e = qualifier.selector.specificity()
hashCount += h
qualifierCount += q
elementCount += e
return self.inline, hashCount, qualifierCount, elementCount
def matches(self, element=None):
if element is None:
return False
# with CSSDOMElementInterface.matchesNode(self, (namespace, tagName)) replacement:
if self.fullName[1] not in {"*", element.domElement.tagName}:
return False
if (
self.fullName[0] not in {None, "", "*"}
and self.fullName[0] != element.domElement.namespaceURI
):
return False
return all(qualifier.matches(element) for qualifier in self.qualifiers)
def asString(self):
result = []
if self.nsPrefix is not None:
result.append(f"{self.nsPrefix}|{self.name}")
else:
result.append(self.name)
for q in self.qualifiers:
if q.isCombiner():
result.insert(0, q.asString())
else:
result.append(q.asString())
return "".join(result)
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSInlineSelector(CSSSelectorBase):
inline = True
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSMutableSelector(CSSSelectorBase, cssParser.CSSSelectorAbstract):
qualifiers: ClassVar[list] = []
def asImmutable(self):
return CSSImmutableSelector(
self.completeName, [q.asImmutable() for q in self.qualifiers]
)
@staticmethod
def combineSelectors(selectorA, op, selectorB):
selectorB.addCombination(op, selectorA)
return selectorB
def addCombination(self, op, other):
self._addQualifier(CSSSelectorCombinationQualifier(op, other))
def addHashId(self, hashId):
self._addQualifier(CSSSelectorHashQualifier(hashId))
def addClass(self, class_):
self._addQualifier(CSSSelectorClassQualifier(class_))
def addAttribute(self, attrName):
self._addQualifier(CSSSelectorAttributeQualifier(attrName))
def addAttributeOperation(self, attrName, op, attr_value):
self._addQualifier(CSSSelectorAttributeQualifier(attrName, op, attr_value))
def addPseudo(self, name):
self._addQualifier(CSSSelectorPseudoQualifier(name))
def addPseudoFunction(self, name, params):
self._addQualifier(CSSSelectorPseudoQualifier(name, params))
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def _addQualifier(self, qualifier):
if self.qualifiers:
self.qualifiers.append(qualifier)
else:
self.qualifiers = [qualifier]
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSImmutableSelector(CSSSelectorBase):
def __init__(self, completeName="*", qualifiers=()) -> None:
# print completeName, qualifiers
self.qualifiers = tuple(qualifiers)
super().__init__(completeName)
self._updateHash()
@classmethod
def fromSelector(cls, selector):
return cls(selector.completeName, selector.qualifiers)
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ CSS Selector Qualifiers -- see CSSImmutableSelector
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSSelectorQualifierBase:
@staticmethod
def isHash():
return False
@staticmethod
def isClass():
return False
@staticmethod
def isAttr():
return False
@staticmethod
def isPseudo():
return False
@staticmethod
def isCombiner():
return False
def asImmutable(self):
return self
@abstractmethod
def asString(self):
raise NotImplementedError
def __str__(self) -> str:
return self.asString()
class CSSSelectorHashQualifier(CSSSelectorQualifierBase):
def __init__(self, hashId) -> None:
self.hashId = hashId
@staticmethod
def isHash():
return True
def __hash__(self):
return hash((self.hashId,))
def asString(self):
return f"#{self.hashId}"
def matches(self, element):
return element.getIdAttr() == self.hashId
def __eq__(self, other):
return self.hashId == other.hashId
def __lt__(self, other):
return self.hashId < other.hashId
class CSSSelectorClassQualifier(CSSSelectorQualifierBase):
def __init__(self, classId) -> None:
self.classId = classId
@staticmethod
def isClass():
return True
def __hash__(self):
return hash((self.classId,))
def asString(self):
return f".{self.classId}"
def matches(self, element):
# return self.classId in element.getClassAttr().split()
attr_value = element.domElement.attributes.get("class")
if attr_value is not None:
return self.classId in attr_value.value.split()
return False
def __eq__(self, other):
return self.classId == other.classId
def __lt__(self, other):
return self.classId < other.classId
class CSSSelectorAttributeQualifier(CSSSelectorQualifierBase):
name, op, value = None, None, NotImplemented
def __init__(self, attrName, op=None, attr_value=NotImplemented) -> None:
self.name = attrName
if op is not self.op:
self.op = op
if attr_value is not self.value:
self.value = attr_value
@staticmethod
def isAttr():
return True
def __hash__(self):
return hash((self.name, self.op, self.value))
def asString(self):
if self.value is NotImplemented:
return f"[{self.name}]"
return f"[{self.name}{self.op}{self.value}]"
def matches(self, element):
if self.op is None:
return element.getAttr(self.name, NotImplemented) != NotImplemented
if self.op == "=":
return self.value == element.getAttr(self.name, NotImplemented)
if self.op == "~=":
# return self.value in element.getAttr(self.name, '').split()
attr_value = element.domElement.attributes.get(self.name)
if attr_value is not None:
return self.value in attr_value.value.split()
return False
if self.op == "|=":
# return self.value in element.getAttr(self.name, '').split('-')
attr_value = element.domElement.attributes.get(self.name)
if attr_value is not None:
return self.value in attr_value.value.split("-")
return False
msg = f"Unknown operator {self.op!r} for {self!r}"
raise RuntimeError(msg)
class CSSSelectorPseudoQualifier(CSSSelectorQualifierBase):
def __init__(self, attrName, params=()) -> None:
self.name = attrName
self.params = tuple(params)
@staticmethod
def isPseudo():
return True
def __hash__(self):
return hash((self.name, self.params))
def asString(self):
if self.params:
return f":{self.name}"
return f":{self.name}({self.params})"
def matches(self, element):
return element.inPseudoState(self.name, self.params)
class CSSSelectorCombinationQualifier(CSSSelectorQualifierBase):
def __init__(self, op, selector) -> None:
self.op = op
self.selector = selector
@staticmethod
def isCombiner():
return True
def __hash__(self):
return hash((self.op, self.selector))
def asImmutable(self):
return type(self)(self.op, self.selector.asImmutable())
def asString(self):
return f"{self.selector.asString()}{self.op}"
def matches(self, element):
op, selector = self.op, self.selector
if op == " ":
return any(selector.matches(parent) for parent in element.iterXMLParents())
if op == ">":
parent = next(element.iterXMLParents(), None)
if parent is None:
return False
return selector.matches(parent)
if op == "+":
return selector.matches(element.getPreviousSibling())
return None
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ CSS Misc
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSTerminalFunction:
def __init__(self, name, params) -> None:
self.name = name
self.params = [
param if isinstance(param, str) else str(param) for param in params
]
def __repr__(self) -> str:
return "<CSS function: {}({})>".format(self.name, ", ".join(self.params))
class CSSTerminalOperator(tuple):
__slots__ = ()
def __new__(cls, *args):
return tuple.__new__(cls, args)
def __repr__(self) -> str:
return "op" + tuple.__repr__(self)
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ CSS Objects
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSDeclarations(dict): # noqa: PLW1641
def __eq__(self, other):
return False
def __lt__(self, other):
return False
class CSSRuleset(dict):
def findCSSRulesFor(self, element, attrName):
ruleResults = [
(nodeFilter, declarations)
for nodeFilter, declarations in self.items()
if (attrName in declarations) and (nodeFilter.matches(element))
]
ruleResults.sort()
return ruleResults
def findCSSRuleFor(self, element, attrName):
# rule is packed in a list to differentiate from "no rule" vs "rule
# whose value evaluates as False"
return self.findCSSRulesFor(element, attrName)[-1:]
def mergeStyles(self, styles):
"""XXX Bugfix for use in PISA."""
for k, v in styles.items():
if k in self and self[k]:
self[k] = copy.copy(self[k])
self[k].update(v)
else:
self[k] = v
class CSSInlineRuleset(CSSRuleset, CSSDeclarations):
def findCSSRulesFor(self, element, attrName):
if attrName in self:
return [(CSSInlineSelector(), self)]
return []
def findCSSRuleFor(self, *args, **kw):
# rule is packed in a list to differentiate from "no rule" vs "rule
# whose value evaluates as False"
return self.findCSSRulesFor(*args, **kw)[-1:]
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ CSS Builder
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSBuilder(cssParser.CSSBuilderAbstract):
RulesetFactory = CSSRuleset
SelectorFactory = CSSMutableSelector
MediumSetFactory = set
DeclarationsFactory = CSSDeclarations
TermFunctionFactory = CSSTerminalFunction
TermOperatorFactory = CSSTerminalOperator
xmlnsSynonyms: ClassVar[dict] = {}
mediumSet = None
trackImportance = True
charset = None
def __init__(self, mediumSet=mediumSet, trackImportance=trackImportance) -> None:
self.setMediumSet(mediumSet)
self.setTrackImportance(trackImportance=trackImportance)
def isValidMedium(self, mediums):
if not mediums:
return False
if "all" in mediums:
return True
mediums = self.MediumSetFactory(mediums)
return bool(self.getMediumSet().intersection(mediums))
def getMediumSet(self):
return self.mediumSet
def setMediumSet(self, mediumSet):
self.mediumSet = self.MediumSetFactory(mediumSet)
def updateMediumSet(self, mediumSet):
self.getMediumSet().update(mediumSet)
def getTrackImportance(self):
return self.trackImportance
def setTrackImportance(self, *, trackImportance=True):
self.trackImportance = trackImportance
# ~ helpers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def _pushState(self):
_restoreState = self.__dict__
self.__dict__ = self.__dict__.copy()
self._restoreState = _restoreState
self.namespaces = {}
def _popState(self):
self.__dict__ = self._restoreState
def _declarations(self, declarations, DeclarationsFactory=None):
DeclarationsFactory = DeclarationsFactory or self.DeclarationsFactory
if self.trackImportance:
normal, important = [], []
for d in declarations:
if d[-1]:
important.append(d[:-1])
else:
normal.append(d[:-1])
return DeclarationsFactory(normal), DeclarationsFactory(important)
return DeclarationsFactory(declarations)
def _xmlnsGetSynonym(self, uri):
# Don't forget to substitute our namespace synonyms!
return self.xmlnsSynonyms.get(uri or None, uri) or None
# ~ css results ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def beginStylesheet(self):
self._pushState()
def endStylesheet(self):
self._popState()
def stylesheet(self, stylesheetElements, stylesheetImports):
# XXX Updated for PISA
if self.trackImportance:
normal, important = self.RulesetFactory(), self.RulesetFactory()
for normalStylesheet, importantStylesheet in stylesheetImports:
normal.mergeStyles(normalStylesheet)
important.mergeStyles(importantStylesheet)
for normalStyleElement, importantStyleElement in stylesheetElements:
normal.mergeStyles(normalStyleElement)
important.mergeStyles(importantStyleElement)
return normal, important
result = self.RulesetFactory()
for stylesheet in stylesheetImports:
result.mergeStyles(stylesheet)
for styleElement in stylesheetElements:
result.mergeStyles(styleElement)
return result
def beginInline(self):
self._pushState()
def endInline(self):
self._popState()
@staticmethod
def specialRules(declarations):
return cssSpecial.parseSpecialRules(declarations)
def inline(self, declarations):
declarations = self.specialRules(declarations)
return self._declarations(declarations, CSSInlineRuleset)
def ruleset(self, selectors, declarations):
# XXX Modified for pisa!
declarations = self.specialRules(declarations)
# XXX Modified for pisa!
if self.trackImportance:
normalDecl, importantDecl = self._declarations(declarations)
normal, important = self.RulesetFactory(), self.RulesetFactory()
for s in selectors:
s = s.asImmutable()
if normalDecl:
normal[s] = normalDecl
if importantDecl:
important[s] = importantDecl
return normal, important
declarations = self._declarations(declarations)
result = [(s.asImmutable(), declarations) for s in selectors]
return self.RulesetFactory(result)
# ~ css namespaces ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def resolveNamespacePrefix(self, nsPrefix, name):
if nsPrefix == "*":
return (nsPrefix, "*", name)
xmlns = self.namespaces.get(nsPrefix, None)
xmlns = self._xmlnsGetSynonym(xmlns)
return (nsPrefix, xmlns, name)
# ~ css @ directives ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def atCharset(self, charset):
self.charset = charset
def atImport(self, import_, mediums, cssParser):
if self.isValidMedium(mediums):
return cssParser.parseExternal(import_)
return None
def atNamespace(self, nsprefix, uri):
self.namespaces[nsprefix] = uri
def atMedia(self, mediums, ruleset):
if self.isValidMedium(mediums):
return ruleset
return None
def atPage(
self,
name: str,
pseudopage: str | None,
data: dict,
*,
isLandscape: bool,
pageBorder,
):
"""This is overridden by xhtml2pdf.context.pisaCSSBuilder."""
raise NotImplementedError
def atFontFace(self, declarations):
"""This is overridden by xhtml2pdf.context.pisaCSSBuilder."""
return self.ruleset([self.selector("*")], declarations)
@staticmethod
def atIdent(_atIdent, _cssParser, src):
return src, NotImplemented
# ~ css selectors ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def selector(self, name):
return self.SelectorFactory(name)
def combineSelectors(self, selectorA, op, selectorB):
return self.SelectorFactory.combineSelectors(selectorA, op, selectorB)
# ~ css declarations ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def property(self, name, value, *, important=False): # noqa: A003
if self.trackImportance:
return (name, value, important)
return (name, value)
def combineTerms(self, termA, op, termB):
if op in {",", " "}:
if isinstance(termA, list):
termA.append(termB)
return termA
return [termA, termB]
if op is None and termB is None:
return [termA]
if isinstance(termA, list):
# Bind these "closer" than the list operators -- i.e. work on
# the (recursively) last element of the list
termA[-1] = self.combineTerms(termA[-1], op, termB)
return termA
return self.TermOperatorFactory(termA, op, termB)
@staticmethod
def termIdent(value):
return value
@staticmethod
def termNumber(value, units=None):
if units:
return value, units
return value
@staticmethod
def termRGB(value):
return value
@staticmethod
def termURI(value):
return value
@staticmethod
def termString(value):
return value
@staticmethod
def termUnicodeRange(value):
return value
def termFunction(self, name, value):
return self.TermFunctionFactory(name, value)
@staticmethod
def termUnknown(src):
return src, NotImplemented
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# ~ CSS Parser -- finally!
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class CSSParser(cssParser.CSSParser):
CSSBuilderFactory = CSSBuilder
def __init__(self, cssBuilder=None, *, create=True, **kw) -> None:
if not cssBuilder and create:
assert cssBuilder is None
cssBuilder = self.createCSSBuilder(**kw)
super().__init__(cssBuilder)
def createCSSBuilder(self, **kw):
return self.CSSBuilderFactory(**kw)
def parseExternal(self, cssResourceName):
if Path(cssResourceName).is_file():
return self.parseFile(cssResourceName)
raise RuntimeError('Cannot resolve external CSS file: "%s"' % cssResourceName)