void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector* selector)
{
if (selector->m_match == CSSSelector::Id)
idsInRules.add(selector->value().impl());
else if (selector->m_match == CSSSelector::Class)
classesInRules.add(selector->value().impl());
else if (selector->isAttributeSelector())
attrsInRules.add(selector->attribute().localName().impl());
switch (selector->pseudoType()) {
case CSSSelector::PseudoFirstLine:
m_usesFirstLineRules = true;
break;
case CSSSelector::PseudoBefore:
case CSSSelector::PseudoAfter:
m_usesBeforeAfterRules = true;
break;
case CSSSelector::PseudoPart:
attrsInRules.add(HTMLNames::partAttr.localName().impl());
break;
case CSSSelector::PseudoHost:
collectFeaturesFromSelectorList(selector->selectorList());
break;
default:
break;
}
}
void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector& selector, RuleFeatureSet::FeatureMetadata& metadata, SelectorFeatureCollectionMode collectionMode)
{
unsigned maxDirectAdjacentSelectors = 0;
for (const CSSSelector* current = &selector; current; current = current->tagHistory()) {
if (current->m_match == CSSSelector::Id) {
metadata.idsInRules.add(current->value());
} else if (current->m_match == CSSSelector::Class && collectionMode == ProcessClasses) {
DescendantInvalidationSet& invalidationSet = ensureClassInvalidationSet(current->value());
invalidationSet.setWholeSubtreeInvalid();
} else if (current->isAttributeSelector()) {
metadata.attrsInRules.add(current->attribute().localName());
}
if (current->pseudoType() == CSSSelector::PseudoFirstLine)
metadata.usesFirstLineRules = true;
if (current->isDirectAdjacentSelector()) {
maxDirectAdjacentSelectors++;
} else if (maxDirectAdjacentSelectors) {
if (maxDirectAdjacentSelectors > metadata.maxDirectAdjacentSelectors)
metadata.maxDirectAdjacentSelectors = maxDirectAdjacentSelectors;
maxDirectAdjacentSelectors = 0;
}
if (current->isSiblingSelector())
metadata.foundSiblingSelector = true;
collectFeaturesFromSelectorList(current->selectorList(), metadata, collectionMode);
}
ASSERT(!maxDirectAdjacentSelectors);
}
void RuleFeatureSet::collectFeaturesFromSelector(const CSSSelector& selector, RuleFeatureSet::FeatureMetadata& metadata, InvalidationSetMode mode)
{
unsigned maxDirectAdjacentSelectors = 0;
for (const CSSSelector* current = &selector; current; current = current->tagHistory()) {
if (mode != AddFeatures) {
if (DescendantInvalidationSet* invalidationSet = invalidationSetForSelector(*current)) {
if (mode == UseSubtreeStyleChange)
invalidationSet->setWholeSubtreeInvalid();
}
}
if (current->pseudoType() == CSSSelector::PseudoFirstLine)
metadata.usesFirstLineRules = true;
if (current->isDirectAdjacentSelector()) {
maxDirectAdjacentSelectors++;
} else if (maxDirectAdjacentSelectors) {
if (maxDirectAdjacentSelectors > metadata.maxDirectAdjacentSelectors)
metadata.maxDirectAdjacentSelectors = maxDirectAdjacentSelectors;
maxDirectAdjacentSelectors = 0;
}
if (current->isSiblingSelector())
metadata.foundSiblingSelector = true;
collectFeaturesFromSelectorList(current->selectorList(), metadata, mode);
if (mode == UseLocalStyleChange && current->relation() != CSSSelector::SubSelector)
mode = UseSubtreeStyleChange;
}
ASSERT(!maxDirectAdjacentSelectors);
}
void SelectRuleFeatureSet::collectFeaturesFromSelectorList(
const CSSSelectorList& list) {
for (const CSSSelector* selector = list.first(); selector;
selector = CSSSelectorList::next(*selector)) {
for (const CSSSelector* component = selector; component;
component = component->tagHistory()) {
if (invalidationSetForSimpleSelector(*component, InvalidateDescendants))
continue;
if (component->selectorList())
collectFeaturesFromSelectorList(*component->selectorList());
}
}
}