C++ RuleData::rule方法代码示例

void RuleFeatureSet::collectFeatures(const RuleData& ruleData)
{
    SelectorFeatures selectorFeatures;
    recursivelyCollectFeaturesFromSelector(selectorFeatures, *ruleData.selector());
    if (selectorFeatures.hasSiblingSelector)
        siblingRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
    if (ruleData.containsUncommonAttributeSelector())
        uncommonAttributeRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
    for (auto* className : selectorFeatures.classesMatchingAncestors) {
        auto addResult = ancestorClassRules.ensure(className, [] {
            return std::make_unique<Vector<RuleFeature>>();
        });
        addResult.iterator->value->append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
    }
    for (auto* selector : selectorFeatures.attributeSelectorsMatchingAncestors) {
        // Hashing by attributeCanonicalLocalName makes this HTML specific.
        auto addResult = ancestorAttributeRulesForHTML.ensure(selector->attributeCanonicalLocalName().impl(), [] {
            return std::make_unique<AttributeRules>();
        });
        auto& rules = *addResult.iterator->value;
        rules.features.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
        // Deduplicate selectors.
        rules.selectors.add(makeAttributeSelectorKey(*selector), selector);
    }
}

static void collectFeaturesFromRuleData(RuleFeatureSet& features, const RuleData& ruleData)
{
    bool hasSiblingSelector;
    features.collectFeaturesFromSelector(*ruleData.selector(), hasSiblingSelector);

    if (hasSiblingSelector)
        features.siblingRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
    if (ruleData.containsUncommonAttributeSelector())
        features.uncommonAttributeRules.append(RuleFeature(ruleData.rule(), ruleData.selectorIndex(), ruleData.hasDocumentSecurityOrigin()));
}

void RuleFeatureSet::collectFeaturesFromRuleData(const RuleData& ruleData)
{
    updateInvalidationSets(ruleData);

    FeatureMetadata metadata;
    collectFeaturesFromSelector(ruleData.selector(), metadata);
    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()));
}

void ElementRuleCollector::collectRuleIfMatches(const RuleData& ruleData, SelectorChecker::BehaviorAtBoundary behaviorAtBoundary, CascadeScope cascadeScope, CascadeOrder cascadeOrder, const MatchRequest& matchRequest, RuleRange& ruleRange)
{
    if (m_canUseFastReject && m_selectorFilter.fastRejectSelector<RuleData::maximumIdentifierCount>(ruleData.descendantSelectorIdentifierHashes()))
        return;

    StyleRule* rule = ruleData.rule();
    PseudoId dynamicPseudo = NOPSEUDO;
    if (ruleMatches(ruleData, matchRequest.scope, dynamicPseudo, behaviorAtBoundary)) {
        // If the rule has no properties to apply, then ignore it in the non-debug mode.
        const StylePropertySet* properties = rule->properties();
        if (!properties || (properties->isEmpty() && !matchRequest.includeEmptyRules))
            return;
        // FIXME: Exposing the non-standard getMatchedCSSRules API to web is the only reason this is needed.
        if (m_sameOriginOnly && !ruleData.hasDocumentSecurityOrigin())
            return;
        // 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)
                m_style->setHasPseudoStyle(dynamicPseudo);
        } else {
            // Update our first/last rule indices in the matched rules array.
            ++ruleRange.lastRuleIndex;
            if (ruleRange.firstRuleIndex == -1)
                ruleRange.firstRuleIndex = ruleRange.lastRuleIndex;

            // Add this rule to our list of matched rules.
            addMatchedRule(&ruleData, cascadeScope, cascadeOrder);
            return;
        }
    }
}

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()));
}

void ElementRuleCollector::collectRuleIfMatches(const RuleData& ruleData, CascadeOrder cascadeOrder, const MatchRequest& matchRequest)
{
    StyleRule* rule = ruleData.rule();
    if (ruleMatches(ruleData)) {
        // If the rule has no properties to apply, then ignore it in the non-debug mode.
        const StylePropertySet& properties = rule->properties();
        if (properties.isEmpty())
            return;

        // Add this rule to our list of matched rules.
        addMatchedRule(&ruleData, cascadeOrder, matchRequest.styleSheetIndex, matchRequest.styleSheet);
    }
}

void ElementRuleCollector::collectRuleIfMatches(const RuleData& ruleData, SelectorChecker::ContextFlags contextFlags, CascadeScope cascadeScope, CascadeOrder cascadeOrder, const MatchRequest& matchRequest, RuleRange& ruleRange)
{
    StyleRule* rule = ruleData.rule();
    if (ruleMatches(ruleData, matchRequest.scope, contextFlags)) {
        // If the rule has no properties to apply, then ignore it in the non-debug mode.
        const StylePropertySet& properties = rule->properties();
        if (properties.isEmpty() && !matchRequest.includeEmptyRules)
            return;

        // Update our first/last rule indices in the matched rules array.
        ++ruleRange.lastRuleIndex;
        if (ruleRange.firstRuleIndex == -1)
            ruleRange.firstRuleIndex = ruleRange.lastRuleIndex;

        // Add this rule to our list of matched rules.
        addMatchedRule(&ruleData, cascadeScope, cascadeOrder, matchRequest.styleSheetIndex, matchRequest.styleSheet);
    }
}

void RuleFeatureSet::updateInvalidationSetsForContentAttribute(const RuleData& ruleData)
{
    const StylePropertySet& propertySet = ruleData.rule()->properties();

    int propertyIndex = propertySet.findPropertyIndex(CSSPropertyContent);

    if (propertyIndex == -1)
        return;

    StylePropertySet::PropertyReference contentProperty = propertySet.propertyAt(propertyIndex);
    CSSValue* contentValue = contentProperty.value();

    if (!contentValue->isValueList())
        return;

    for (auto& item : toCSSValueList(*contentValue)) {
        if (!item->isFunctionValue())
            continue;
        CSSFunctionValue* functionValue = toCSSFunctionValue(item.get());
        if (functionValue->functionType() != CSSValueAttr)
            continue;
        ensureAttributeInvalidationSet(AtomicString(toCSSPrimitiveValue(functionValue->item(0))->getStringValue())).setInvalidatesSelf();
    }
}