bool SelectorChecker::checkPseudoClass(const CSSSelector& selector)
{
switch (selector.pseudoType()) {
case CSSSelector::PseudoFocus:
m_matchedFocusSelector = true;
return matchesFocusPseudoClass(m_element);
case CSSSelector::PseudoHover:
m_matchedHoverSelector = true;
return m_element.hovered();
case CSSSelector::PseudoActive:
m_matchedActiveSelector = true;
return m_element.active();
case CSSSelector::PseudoLang:
{
AtomicString value = m_element.computeInheritedLanguage();
const AtomicString& argument = selector.argument();
if (value.isEmpty() || !value.startsWith(argument, false))
break;
if (value.length() != argument.length() && value[argument.length()] != '-')
break;
return true;
}
case CSSSelector::PseudoHost:
{
// We can only get here if the selector was defined in the right
// scope so we don't need to check it.
// For empty parameter case, i.e. just :host or :host().
if (!selector.selectorList())
return true;
for (const CSSSelector* current = selector.selectorList()->first(); current; current = CSSSelectorList::next(*current)) {
if (match(*current))
return true;
}
return false;
}
case CSSSelector::PseudoUnknown:
case CSSSelector::PseudoNotParsed:
case CSSSelector::PseudoUserAgentCustomElement:
return false;
}
ASSERT_NOT_REACHED();
return false;
}
bool SelectorChecker::checkPseudoClass(const SelectorCheckingContext& context) const
{
ASSERT(context.element);
Element& element = *context.element;
ASSERT(context.selector);
const CSSSelector& selector = *context.selector;
ASSERT(selector.match() == CSSSelector::PseudoClass);
// Normal element pseudo class checking.
switch (selector.pseudoType()) {
case CSSSelector::PseudoFocus:
if (m_mode == ResolvingStyle) {
if (context.elementStyle)
context.elementStyle->setAffectedByFocus();
}
return matchesFocusPseudoClass(element);
case CSSSelector::PseudoHover:
if (m_mode == ResolvingStyle) {
if (context.elementStyle)
context.elementStyle->setAffectedByHover();
}
return element.hovered();
case CSSSelector::PseudoActive:
if (m_mode == ResolvingStyle) {
if (context.elementStyle)
context.elementStyle->setAffectedByActive();
}
return element.active();
case CSSSelector::PseudoLang:
{
AtomicString value = element.computeInheritedLanguage();
const AtomicString& argument = selector.argument();
if (value.isEmpty() || !value.startsWith(argument, false))
break;
if (value.length() != argument.length() && value[argument.length()] != '-')
break;
return true;
}
case CSSSelector::PseudoUnresolved:
return element.isUnresolvedCustomElement();
case CSSSelector::PseudoHost:
{
if (m_mode == SharingRules)
return true;
// :host only matches a shadow host when :host is in a shadow tree of the shadow host.
if (!context.scope)
return false;
const ContainerNode* shadowHost = context.scope->shadowHost();
if (!shadowHost || shadowHost != element)
return false;
ASSERT(element.shadow());
// For empty parameter case, i.e. just :host or :host().
if (!selector.selectorList())
return true;
SelectorCheckingContext subContext(context);
subContext.contextFlags = TreatShadowHostAsNormalScope;
for (subContext.selector = selector.selectorList()->first(); subContext.selector; subContext.selector = CSSSelectorList::next(*subContext.selector)) {
if (match(subContext))
return true;
}
return false;
}
case CSSSelector::PseudoUnknown:
case CSSSelector::PseudoNotParsed:
case CSSSelector::PseudoUserAgentCustomElement:
return false;
}
ASSERT_NOT_REACHED();
return false;
}
