static bool anyAttributeMatches(Element& element, CSSSelector::Match match, const CSSSelector& selector)
{
const QualifiedName& selectorAttr = selector.attribute();
ASSERT(selectorAttr.localName() != starAtom); // Should not be possible from the CSS grammar.
// Synchronize the attribute in case it is lazy-computed.
element.synchronizeAttribute(selectorAttr.localName());
const AtomicString& selectorValue = selector.value();
bool caseInsensitive = selector.attributeMatchType() == CSSSelector::CaseInsensitive;
AttributeCollection attributes = element.attributesWithoutUpdate();
AttributeCollection::iterator end = attributes.end();
for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
const Attribute& attributeItem = *it;
if (!attributeItem.matches(selectorAttr))
continue;
if (attributeValueMatches(attributeItem, match, selectorValue, !caseInsensitive))
return true;
}
return false;
}
bool operator()(const CSSSelector& selector)
{
if (selector.match() == CSSSelector::Tag && selector.tagQName().prefix() != nullAtom && selector.tagQName().prefix() != starAtom)
return true;
if (selector.isAttributeSelector() && selector.attribute().prefix() != nullAtom && selector.attribute().prefix() != starAtom)
return true;
return false;
}
void RuleFeatureSet::extractInvalidationSetFeature(const CSSSelector& selector, InvalidationSetFeatures& features)
{
if (selector.m_match == CSSSelector::Tag)
features.tagName = selector.tagQName().localName();
else if (selector.m_match == CSSSelector::Id)
features.id = selector.value();
else if (selector.m_match == CSSSelector::Class)
features.classes.append(selector.value());
else if (selector.isAttributeSelector())
features.attributes.append(selector.attribute().localName());
else if (selector.isCustomPseudoElement())
features.customPseudoElement = true;
}
bool RuleFeatureSet::extractInvalidationSetFeature(const CSSSelector& selector, InvalidationSetFeatures& features)
{
if (selector.match() == CSSSelector::Tag && selector.tagQName().localName() != starAtom)
features.tagName = selector.tagQName().localName();
else if (selector.match() == CSSSelector::Id)
features.id = selector.value();
else if (selector.match() == CSSSelector::Class)
features.classes.append(selector.value());
else if (selector.isAttributeSelector())
features.attributes.append(selector.attribute().localName());
else if (selector.pseudoType() == CSSSelector::PseudoWebKitCustomElement)
features.customPseudoElement = true;
else if (selector.pseudoType() == CSSSelector::PseudoBefore || selector.pseudoType() == CSSSelector::PseudoAfter)
features.hasBeforeOrAfter = true;
else
return false;
return true;
}
static bool anyAttributeMatches(const Element& element, CSSSelector::Match match, const CSSSelector& selector)
{
const QualifiedName& selectorAttr = selector.attribute();
ASSERT(selectorAttr.localName() != starAtom); // Should not be possible from the CSS grammar.
if (match == CSSSelector::Set)
return element.hasAttribute(selectorAttr);
ASSERT(match == CSSSelector::Exact);
const AtomicString& selectorValue = selector.value();
const AtomicString& value = element.getAttribute(selectorAttr);
if (value.isNull())
return false;
if (selector.attributeMatchType() == CSSSelector::CaseInsensitive)
return equalIgnoringCase(selectorValue, value);
return selectorValue == value;
}
static bool canBeUsedForIdFastPath(const CSSSelector& selector)
{
return selector.match() == CSSSelector::Id
|| (selector.match() == CSSSelector::Exact && selector.attribute() == HTMLNames::idAttr && !selector.attributeValueMatchingIsCaseInsensitive());
}