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8bdd05a389
This flag doesn't really make sense in sky, rules should only match if they're from the same scope or are a :host rule in the ShadowRoot on the element. Removing this also eliminates the ScopeContainsLastMatchedElement flag. For now we just check if the scope is null for the same behavior, in the future we'll never let scope be null and we'll just enforce the normal style scoping rules. R=ojan@chromium.org Review URL: https://codereview.chromium.org/833443003
109 lines
4.2 KiB
C++
109 lines
4.2 KiB
C++
/*
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* Copyright (C) 2011, 2013 Apple Inc. All rights reserved.
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* Copyright (C) 2014 Samsung Electronics. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "sky/engine/config.h"
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#include "sky/engine/core/dom/SelectorQuery.h"
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#include "sky/engine/bindings/core/v8/ExceptionState.h"
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#include "sky/engine/core/css/SelectorChecker.h"
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#include "sky/engine/core/css/parser/BisonCSSParser.h"
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#include "sky/engine/core/dom/Document.h"
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#include "sky/engine/core/dom/ElementTraversal.h"
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#include "sky/engine/core/dom/Node.h"
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#include "sky/engine/core/dom/StaticNodeList.h"
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namespace blink {
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PassOwnPtr<SelectorQuery> SelectorQuery::adopt(CSSSelectorList& selectorList)
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{
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return adoptPtr(new SelectorQuery(selectorList));
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}
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SelectorQuery::SelectorQuery(CSSSelectorList& selectorList)
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{
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m_selectors.adopt(selectorList);
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}
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bool SelectorQuery::matches(Element& element) const
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{
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return selectorMatches(element, element);
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}
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PassRefPtr<StaticElementList> SelectorQuery::queryAll(ContainerNode& rootNode) const
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{
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Vector<RefPtr<Element> > result;
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for (Element* element = ElementTraversal::firstWithin(rootNode); element; element = ElementTraversal::next(*element, &rootNode)) {
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if (selectorMatches(rootNode, *element))
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result.append(element);
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}
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return StaticElementList::adopt(result);
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}
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PassRefPtr<Element> SelectorQuery::queryFirst(ContainerNode& rootNode) const
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{
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for (Element* element = ElementTraversal::firstWithin(rootNode); element; element = ElementTraversal::next(*element, &rootNode)) {
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if (selectorMatches(rootNode, *element))
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return element;
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}
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return nullptr;
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}
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bool SelectorQuery::selectorMatches(ContainerNode& rootNode, Element& element) const
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{
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SelectorChecker checker(element.document(), SelectorChecker::QueryingRules);
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for (const CSSSelector* selector = m_selectors.first(); selector; selector = CSSSelectorList::next(*selector)) {
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SelectorChecker::SelectorCheckingContext context(*selector, &element);
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context.scope = !rootNode.isDocumentNode() ? &rootNode : 0;
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if (checker.match(context))
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return true;
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}
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return false;
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}
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SelectorQuery* SelectorQueryCache::add(const AtomicString& selectors, const Document& document, ExceptionState& exceptionState)
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{
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HashMap<AtomicString, OwnPtr<SelectorQuery> >::iterator it = m_entries.find(selectors);
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if (it != m_entries.end())
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return it->value.get();
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BisonCSSParser parser(CSSParserContext(document, 0));
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CSSSelectorList selectorList;
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parser.parseSelector(selectors, selectorList);
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if (!selectorList.first()) {
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exceptionState.throwDOMException(SyntaxError, "'" + selectors + "' is not a valid selector.");
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return 0;
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}
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const unsigned maximumSelectorQueryCacheSize = 256;
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if (m_entries.size() == maximumSelectorQueryCacheSize)
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m_entries.remove(m_entries.begin());
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return m_entries.add(selectors, SelectorQuery::adopt(selectorList)).storedValue->value.get();
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}
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}
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