This source file includes following definitions.
- create
- m_isValidSelector
- parseSelect
- parseAttribute
- validateSelect
- checkOneSelector
- matchSelector
#include "config.h"
#include "core/html/HTMLContentElement.h"
#include "HTMLNames.h"
#include "core/css/SelectorChecker.h"
#include "core/css/SiblingTraversalStrategies.h"
#include "core/css/parser/BisonCSSParser.h"
#include "core/dom/QualifiedName.h"
#include "core/dom/shadow/ElementShadow.h"
#include "core/dom/shadow/ShadowRoot.h"
namespace WebCore {
using namespace HTMLNames;
PassRefPtr<HTMLContentElement> HTMLContentElement::create(Document& document)
{
return adoptRef(new HTMLContentElement(document));
}
HTMLContentElement::HTMLContentElement(Document& document)
: InsertionPoint(contentTag, document)
, m_shouldParseSelect(false)
, m_isValidSelector(true)
{
ScriptWrappable::init(this);
}
HTMLContentElement::~HTMLContentElement()
{
}
void HTMLContentElement::parseSelect()
{
ASSERT(m_shouldParseSelect);
BisonCSSParser parser(CSSParserContext(document(), 0));
parser.parseSelector(m_select, m_selectorList);
m_shouldParseSelect = false;
m_isValidSelector = validateSelect();
if (!m_isValidSelector) {
CSSSelectorList emptyList;
m_selectorList.adopt(emptyList);
}
}
void HTMLContentElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (name == selectAttr) {
if (ShadowRoot* root = containingShadowRoot())
root->owner()->willAffectSelector();
m_shouldParseSelect = true;
m_select = value;
} else {
InsertionPoint::parseAttribute(name, value);
}
}
bool HTMLContentElement::validateSelect() const
{
ASSERT(!m_shouldParseSelect);
if (m_select.isNull() || m_select.isEmpty())
return true;
if (!m_selectorList.isValid())
return false;
for (const CSSSelector* selector = m_selectorList.first(); selector; selector = m_selectorList.next(*selector)) {
if (!selector->isCompound())
return false;
}
return true;
}
static inline bool checkOneSelector(const CSSSelector& selector, const Vector<Node*, 32>& siblings, int nth)
{
Element* element = toElement(siblings[nth]);
SelectorChecker selectorChecker(element->document(), SelectorChecker::CollectingCSSRules);
SelectorChecker::SelectorCheckingContext context(selector, element, SelectorChecker::VisitedMatchEnabled);
ShadowDOMSiblingTraversalStrategy strategy(siblings, nth);
return selectorChecker.match(context, strategy) == SelectorChecker::SelectorMatches;
}
bool HTMLContentElement::matchSelector(const Vector<Node*, 32>& siblings, int nth) const
{
for (const CSSSelector* selector = selectorList().first(); selector; selector = CSSSelectorList::next(*selector)) {
if (checkOneSelector(*selector, siblings, nth))
return true;
}
return false;
}
}