void RuleFeatureSet::collectFeaturesFromRuleData(const RuleData& ruleData)
{
FeatureMetadata metadata;
bool selectorUsesClassInvalidationSet = false;
if (m_targetedStyleRecalcEnabled)
selectorUsesClassInvalidationSet = updateClassInvalidationSets(ruleData.selector());
SelectorFeatureCollectionMode collectionMode;
if (selectorUsesClassInvalidationSet)
collectionMode = DontProcessClasses;
else
collectionMode = ProcessClasses;
collectFeaturesFromSelector(ruleData.selector(), metadata, collectionMode);
m_metadata.add(metadata);
if (metadata.foundSiblingSelector)
siblingRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
if (ruleData.containsUncommonAttributeSelector())
uncommonAttributeRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
}
static void collectFeaturesFromRuleData(RuleFeatureSet& features, const RuleData& ruleData)
{
bool foundSiblingSelector = false;
for (CSSSelector* selector = ruleData.selector(); selector; selector = selector->tagHistory()) {
features.collectFeaturesFromSelector(selector);
if (CSSSelectorList* selectorList = selector->selectorList()) {
for (CSSSelector* subSelector = selectorList->first(); subSelector; subSelector = CSSSelectorList::next(subSelector)) {
if (!foundSiblingSelector && selector->isSiblingSelector())
foundSiblingSelector = true;
features.collectFeaturesFromSelector(subSelector);
}
} else if (!foundSiblingSelector && selector->isSiblingSelector())
foundSiblingSelector = true;
}
if (foundSiblingSelector)
features.siblingRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
if (ruleData.containsUncommonAttributeSelector())
features.uncommonAttributeRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
}
void ElementRuleCollector::didMatchRule(const RuleData& ruleData, const SelectorChecker::MatchResult& result, CascadeOrder cascadeOrder, const MatchRequest& matchRequest)
{
PseudoId dynamicPseudo = result.dynamicPseudo;
// If we're matching normal rules, set a pseudo bit if
// we really just matched a pseudo-element.
if (dynamicPseudo != NOPSEUDO && m_pseudoStyleRequest.pseudoId == NOPSEUDO) {
if (m_mode == SelectorChecker::CollectingCSSRules || m_mode == SelectorChecker::CollectingStyleRules)
return;
// FIXME: Matching should not modify the style directly.
if (!m_style || dynamicPseudo >= FIRST_INTERNAL_PSEUDOID)
return;
if ((dynamicPseudo == BEFORE || dynamicPseudo == AFTER) && !ruleData.rule()->properties().hasProperty(CSSPropertyContent))
return;
m_style->setHasPseudoStyle(dynamicPseudo);
} else {
if (m_style && ruleData.containsUncommonAttributeSelector())
m_style->setUnique();
m_matchedRules.append(MatchedRule(&ruleData, result.specificity, cascadeOrder, matchRequest.styleSheetIndex, matchRequest.styleSheet));
}
}
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;
}