| /* |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "core/html/shadow/HTMLContentElement.h" |
| |
| #include "HTMLNames.h" |
| #include "core/css/CSSParser.h" |
| #include "core/css/CSSSelectorList.h" |
| #include "core/css/SelectorChecker.h" |
| #include "core/css/SiblingTraversalStrategies.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); |
| |
| CSSParser parser(document()); |
| 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); |
| PseudoId ignoreDynamicPseudo = NOPSEUDO; |
| return selectorChecker.match(context, ignoreDynamicPseudo, 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; |
| } |
| |
| } |