inline bool ElementRuleCollector::ruleMatches(const RuleData& ruleData, unsigned& specificity)
{
// We know a sufficiently simple single part selector matches simply because we found it from the rule hash when filtering the RuleSet.
// This is limited to HTML only so we don't need to check the namespace (because of tag name match).
MatchBasedOnRuleHash matchBasedOnRuleHash = ruleData.matchBasedOnRuleHash();
if (matchBasedOnRuleHash != MatchBasedOnRuleHash::None && m_element.isHTMLElement()) {
ASSERT_WITH_MESSAGE(m_pseudoStyleRequest.pseudoId == NOPSEUDO, "If we match based on the rule hash while collecting for a particular pseudo element ID, we would add incorrect rules for that pseudo element ID. We should never end in ruleMatches() with a pseudo element if the ruleData cannot match any pseudo element.");
switch (matchBasedOnRuleHash) {
case MatchBasedOnRuleHash::None:
ASSERT_NOT_REACHED();
break;
case MatchBasedOnRuleHash::Universal:
specificity = 0;
break;
case MatchBasedOnRuleHash::ClassA:
specificity = static_cast<unsigned>(SelectorSpecificityIncrement::ClassA);
break;
case MatchBasedOnRuleHash::ClassB:
specificity = static_cast<unsigned>(SelectorSpecificityIncrement::ClassB);
break;
case MatchBasedOnRuleHash::ClassC:
specificity = static_cast<unsigned>(SelectorSpecificityIncrement::ClassC);
break;
}
return true;
}
#if ENABLE(CSS_SELECTOR_JIT)
void* compiledSelectorChecker = ruleData.compiledSelectorCodeRef().code().executableAddress();
if (!compiledSelectorChecker && ruleData.compilationStatus() == SelectorCompilationStatus::NotCompiled) {
JSC::VM& vm = m_element.document().scriptExecutionContext()->vm();
SelectorCompilationStatus compilationStatus;
JSC::MacroAssemblerCodeRef compiledSelectorCodeRef;
compilationStatus = SelectorCompiler::compileSelector(ruleData.selector(), &vm, SelectorCompiler::SelectorContext::RuleCollector, compiledSelectorCodeRef);
ruleData.setCompiledSelector(compilationStatus, compiledSelectorCodeRef);
compiledSelectorChecker = ruleData.compiledSelectorCodeRef().code().executableAddress();
}
if (compiledSelectorChecker && ruleData.compilationStatus() == SelectorCompilationStatus::SimpleSelectorChecker) {
SelectorCompiler::RuleCollectorSimpleSelectorChecker selectorChecker = SelectorCompiler::ruleCollectorSimpleSelectorCheckerFunction(compiledSelectorChecker, ruleData.compilationStatus());
#if !ASSERT_MSG_DISABLED
unsigned ignoreSpecificity;
ASSERT_WITH_MESSAGE(!selectorChecker(&m_element, &ignoreSpecificity) || m_pseudoStyleRequest.pseudoId == NOPSEUDO, "When matching pseudo elements, we should never compile a selector checker without context unless it cannot match anything.");
#endif
#if CSS_SELECTOR_JIT_PROFILING
ruleData.compiledSelectorUsed();
#endif
bool selectorMatches = selectorChecker(&m_element, &specificity);
if (selectorMatches && ruleData.containsUncommonAttributeSelector())
m_didMatchUncommonAttributeSelector = true;
return selectorMatches;
}
#endif // ENABLE(CSS_SELECTOR_JIT)
SelectorChecker::CheckingContext context(m_mode);
context.pseudoId = m_pseudoStyleRequest.pseudoId;
context.scrollbar = m_pseudoStyleRequest.scrollbar;
context.scrollbarPart = m_pseudoStyleRequest.scrollbarPart;
bool selectorMatches;
#if ENABLE(CSS_SELECTOR_JIT)
if (compiledSelectorChecker) {
ASSERT(ruleData.compilationStatus() == SelectorCompilationStatus::SelectorCheckerWithCheckingContext);
SelectorCompiler::RuleCollectorSelectorCheckerWithCheckingContext selectorChecker = SelectorCompiler::ruleCollectorSelectorCheckerFunctionWithCheckingContext(compiledSelectorChecker, ruleData.compilationStatus());
#if CSS_SELECTOR_JIT_PROFILING
ruleData.compiledSelectorUsed();
#endif
selectorMatches = selectorChecker(&m_element, &context, &specificity);
} else
#endif // ENABLE(CSS_SELECTOR_JIT)
{
auto* selector = ruleData.selector();
if (m_isMatchingSlottedPseudoElements) {
selector = findSlottedPseudoElementSelector(ruleData.selector());
if (!selector)
return false;
}
// Slow path.
SelectorChecker selectorChecker(m_element.document());
selectorMatches = selectorChecker.match(*selector, m_element, context, specificity);
}
if (ruleData.containsUncommonAttributeSelector()) {
if (selectorMatches || context.pseudoIDSet)
m_didMatchUncommonAttributeSelector = true;
}
m_matchedPseudoElementIds.merge(context.pseudoIDSet);
m_styleRelations.appendVector(context.styleRelations);
return selectorMatches;
}
inline bool ElementRuleCollector::ruleMatches(const RuleData& ruleData, PseudoId& dynamicPseudo)
{
bool fastCheckableSelector = ruleData.hasFastCheckableSelector();
if (fastCheckableSelector) {
// We know this selector does not include any pseudo elements.
if (m_pseudoStyleRequest.pseudoId != NOPSEUDO)
return false;
// We know a sufficiently simple single part selector matches simply because we found it from the rule hash.
// This is limited to HTML only so we don't need to check the namespace.
if (ruleData.hasRightmostSelectorMatchingHTMLBasedOnRuleHash() && m_element.isHTMLElement()) {
if (!ruleData.hasMultipartSelector())
return true;
}
}
#if ENABLE(CSS_SELECTOR_JIT)
void* compiledSelectorChecker = ruleData.compiledSelectorCodeRef().code().executableAddress();
if (!compiledSelectorChecker && ruleData.compilationStatus() == SelectorCompilationStatus::NotCompiled) {
JSC::VM* vm = m_element.document().scriptExecutionContext()->vm();
SelectorCompilationStatus compilationStatus;
JSC::MacroAssemblerCodeRef compiledSelectorCodeRef;
compilationStatus = SelectorCompiler::compileSelector(ruleData.selector(), vm, SelectorCompiler::SelectorContext::RuleCollector, compiledSelectorCodeRef);
ruleData.setCompiledSelector(compilationStatus, compiledSelectorCodeRef);
compiledSelectorChecker = ruleData.compiledSelectorCodeRef().code().executableAddress();
}
if (compiledSelectorChecker) {
if (m_pseudoStyleRequest.pseudoId != NOPSEUDO)
return false;
if (ruleData.compilationStatus() == SelectorCompilationStatus::SimpleSelectorChecker) {
SelectorCompiler::SimpleSelectorChecker selectorChecker = SelectorCompiler::simpleSelectorCheckerFunction(compiledSelectorChecker, ruleData.compilationStatus());
return selectorChecker(&m_element);
}
ASSERT(ruleData.compilationStatus() == SelectorCompilationStatus::SelectorCheckerWithCheckingContext);
SelectorCompiler::SelectorCheckerWithCheckingContext selectorChecker = SelectorCompiler::selectorCheckerFunctionWithCheckingContext(compiledSelectorChecker, ruleData.compilationStatus());
SelectorCompiler::CheckingContext context;
context.elementStyle = m_style;
context.resolvingMode = m_mode;
return selectorChecker(&m_element, &context);
}
#endif // ENABLE(CSS_SELECTOR_JIT)
if (fastCheckableSelector) {
if (ruleData.selector()->m_match == CSSSelector::Tag && !SelectorChecker::tagMatches(&m_element, ruleData.selector()->tagQName()))
return false;
SelectorCheckerFastPath selectorCheckerFastPath(ruleData.selector(), &m_element);
if (!selectorCheckerFastPath.matchesRightmostAttributeSelector())
return false;
return selectorCheckerFastPath.matches();
}
// Slow path.
SelectorChecker selectorChecker(m_element.document(), m_mode);
SelectorChecker::SelectorCheckingContext context(ruleData.selector(), &m_element, SelectorChecker::VisitedMatchEnabled);
context.elementStyle = m_style;
context.pseudoId = m_pseudoStyleRequest.pseudoId;
context.scrollbar = m_pseudoStyleRequest.scrollbar;
context.scrollbarPart = m_pseudoStyleRequest.scrollbarPart;
if (!selectorChecker.match(context, dynamicPseudo))
return false;
if (m_pseudoStyleRequest.pseudoId != NOPSEUDO && m_pseudoStyleRequest.pseudoId != dynamicPseudo)
return false;
return true;
}