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28 #include "core/html/shadow/HTMLContentElement.h"
30 #include "HTMLNames.h"
31 #include "core/css/parser/BisonCSSParser.h"
32 #include "core/css/SelectorChecker.h"
33 #include "core/css/SiblingTraversalStrategies.h"
34 #include "core/dom/QualifiedName.h"
35 #include "core/dom/shadow/ElementShadow.h"
36 #include "core/dom/shadow/ShadowRoot.h"
40 using namespace HTMLNames;
42 PassRefPtr<HTMLContentElement> HTMLContentElement::create(Document& document)
44 return adoptRef(new HTMLContentElement(document));
47 HTMLContentElement::HTMLContentElement(Document& document)
48 : InsertionPoint(contentTag, document)
49 , m_shouldParseSelect(false)
50 , m_isValidSelector(true)
52 ScriptWrappable::init(this);
55 HTMLContentElement::~HTMLContentElement()
59 void HTMLContentElement::parseSelect()
61 ASSERT(m_shouldParseSelect);
63 BisonCSSParser parser(CSSParserContext(document(), 0));
64 parser.parseSelector(m_select, m_selectorList);
65 m_shouldParseSelect = false;
66 m_isValidSelector = validateSelect();
67 if (!m_isValidSelector) {
68 CSSSelectorList emptyList;
69 m_selectorList.adopt(emptyList);
73 void HTMLContentElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
75 if (name == selectAttr) {
76 if (ShadowRoot* root = containingShadowRoot())
77 root->owner()->willAffectSelector();
78 m_shouldParseSelect = true;
81 InsertionPoint::parseAttribute(name, value);
84 bool HTMLContentElement::validateSelect() const
86 ASSERT(!m_shouldParseSelect);
88 if (m_select.isNull() || m_select.isEmpty())
91 if (!m_selectorList.isValid())
94 for (const CSSSelector* selector = m_selectorList.first(); selector; selector = m_selectorList.next(*selector)) {
95 if (!selector->isCompound())
102 static inline bool checkOneSelector(const CSSSelector& selector, const Vector<Node*, 32>& siblings, int nth)
104 Element* element = toElement(siblings[nth]);
105 SelectorChecker selectorChecker(element->document(), SelectorChecker::CollectingCSSRules);
106 SelectorChecker::SelectorCheckingContext context(selector, element, SelectorChecker::VisitedMatchEnabled);
107 ShadowDOMSiblingTraversalStrategy strategy(siblings, nth);
108 return selectorChecker.match(context, strategy) == SelectorChecker::SelectorMatches;
111 bool HTMLContentElement::matchSelector(const Vector<Node*, 32>& siblings, int nth) const
113 for (const CSSSelector* selector = selectorList().first(); selector; selector = CSSSelectorList::next(*selector)) {
114 if (checkOneSelector(*selector, siblings, nth))