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28 #include "core/html/HTMLContentElement.h"
30 #include "HTMLNames.h"
31 #include "RuntimeEnabledFeatures.h"
32 #include "core/css/SelectorChecker.h"
33 #include "core/css/SiblingTraversalStrategies.h"
34 #include "core/css/parser/BisonCSSParser.h"
35 #include "core/dom/QualifiedName.h"
36 #include "core/dom/shadow/ElementShadow.h"
37 #include "core/dom/shadow/ShadowRoot.h"
41 using namespace HTMLNames;
43 PassRefPtrWillBeRawPtr<HTMLContentElement> HTMLContentElement::create(Document& document)
45 return adoptRefWillBeRefCountedGarbageCollected(new HTMLContentElement(document));
48 HTMLContentElement::HTMLContentElement(Document& document)
49 : InsertionPoint(contentTag, document)
50 , m_shouldParseSelect(false)
51 , m_isValidSelector(true)
53 ScriptWrappable::init(this);
56 HTMLContentElement::~HTMLContentElement()
60 void HTMLContentElement::parseSelect()
62 ASSERT(m_shouldParseSelect);
64 BisonCSSParser parser(CSSParserContext(document(), 0));
65 parser.parseSelector(m_select, m_selectorList);
66 m_shouldParseSelect = false;
67 m_isValidSelector = validateSelect();
68 if (!m_isValidSelector) {
69 CSSSelectorList emptyList;
70 m_selectorList.adopt(emptyList);
74 void HTMLContentElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
76 if (name == selectAttr) {
77 if (ShadowRoot* root = containingShadowRoot())
78 root->owner()->willAffectSelector();
79 m_shouldParseSelect = true;
82 InsertionPoint::parseAttribute(name, value);
86 bool HTMLContentElement::validateSelect() const
88 ASSERT(!m_shouldParseSelect);
90 if (m_select.isNull() || m_select.isEmpty())
93 if (!m_selectorList.isValid())
96 bool disallowPseudoClasses = !RuntimeEnabledFeatures::pseudoClassesInMatchingCriteriaInAuthorShadowTreesEnabled() && containingShadowRoot() && containingShadowRoot()->type() == ShadowRoot::AuthorShadowRoot;
98 for (const CSSSelector* selector = m_selectorList.first(); selector; selector = m_selectorList.next(*selector)) {
99 if (!selector->isCompound())
101 if (!disallowPseudoClasses)
103 for (const CSSSelector* subSelector = selector; subSelector; subSelector = subSelector->tagHistory()) {
104 if (subSelector->m_match == CSSSelector::PseudoClass)
111 static inline bool checkOneSelector(const CSSSelector& selector, const Vector<Node*, 32>& siblings, int nth)
113 Element* element = toElement(siblings[nth]);
114 SelectorChecker selectorChecker(element->document(), SelectorChecker::CollectingCSSRules);
115 SelectorChecker::SelectorCheckingContext context(selector, element, SelectorChecker::VisitedMatchEnabled);
116 ShadowDOMSiblingTraversalStrategy strategy(siblings, nth);
117 return selectorChecker.match(context, strategy) == SelectorChecker::SelectorMatches;
120 bool HTMLContentElement::matchSelector(const Vector<Node*, 32>& siblings, int nth) const
122 for (const CSSSelector* selector = selectorList().first(); selector; selector = CSSSelectorList::next(*selector)) {
123 if (checkOneSelector(*selector, siblings, nth))