| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. |
| * Copyright (C) 2012 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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/css/resolver/ScopedStyleResolver.h" |
| |
| #include "core/HTMLNames.h" |
| #include "core/css/CSSStyleSheet.h" |
| #include "core/css/PageRuleCollector.h" |
| #include "core/css/RuleFeature.h" |
| #include "core/css/StyleRule.h" |
| #include "core/css/StyleSheetContents.h" |
| #include "core/css/resolver/StyleResolver.h" // For MatchRequest. |
| #include "core/css/resolver/ViewportStyleResolver.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/shadow/ElementShadow.h" |
| #include "core/dom/shadow/ShadowRoot.h" |
| #include "core/html/HTMLStyleElement.h" |
| |
| namespace blink { |
| |
| TreeScope* ScopedStyleResolver::treeScopeFor(Document& document, const CSSStyleSheet* sheet) |
| { |
| ASSERT(sheet); |
| |
| if (!sheet->ownerDocument()) |
| return 0; |
| |
| Node* ownerNode = sheet->ownerNode(); |
| if (!isHTMLStyleElement(ownerNode)) |
| return &document; |
| |
| HTMLStyleElement& styleElement = toHTMLStyleElement(*ownerNode); |
| if (styleElement.isInShadowTree()) |
| return styleElement.containingShadowRoot(); |
| return &document; |
| } |
| |
| ScopedStyleResolver* ScopedStyleResolver::parent() const |
| { |
| for (TreeScope* scope = treeScope().parentTreeScope(); scope; scope = scope->parentTreeScope()) { |
| if (ScopedStyleResolver* resolver = scope->scopedStyleResolver()) |
| return resolver; |
| } |
| return 0; |
| } |
| |
| void ScopedStyleResolver::addRulesFromSheet(CSSStyleSheet* cssSheet, const MediaQueryEvaluator& medium, StyleResolver* resolver) |
| { |
| m_authorStyleSheets.append(cssSheet); |
| StyleSheetContents* sheet = cssSheet->contents(); |
| |
| AddRuleFlags addRuleFlags = resolver->document().securityOrigin()->canRequest(sheet->baseURL()) ? RuleHasDocumentSecurityOrigin : RuleHasNoSpecialState; |
| const RuleSet& ruleSet = sheet->ensureRuleSet(medium, addRuleFlags); |
| resolver->addMediaQueryResults(ruleSet.viewportDependentMediaQueryResults()); |
| resolver->processScopedRules(ruleSet, cssSheet, treeScope().rootNode()); |
| } |
| |
| void ScopedStyleResolver::collectFeaturesTo(RuleFeatureSet& features, HashSet<const StyleSheetContents*>& visitedSharedStyleSheetContents) const |
| { |
| for (size_t i = 0; i < m_authorStyleSheets.size(); ++i) { |
| StyleSheetContents* contents = m_authorStyleSheets[i]->contents(); |
| if (contents->hasOneClient() || visitedSharedStyleSheetContents.add(contents).isNewEntry) |
| features.add(contents->ruleSet().features()); |
| } |
| } |
| |
| void ScopedStyleResolver::resetAuthorStyle() |
| { |
| m_authorStyleSheets.clear(); |
| m_keyframesRuleMap.clear(); |
| } |
| |
| const StyleRuleKeyframes* ScopedStyleResolver::keyframeStylesForAnimation(const StringImpl* animationName) |
| { |
| if (m_keyframesRuleMap.isEmpty()) |
| return 0; |
| |
| KeyframesRuleMap::iterator it = m_keyframesRuleMap.find(animationName); |
| if (it == m_keyframesRuleMap.end()) |
| return 0; |
| |
| return it->value.get(); |
| } |
| |
| void ScopedStyleResolver::addKeyframeStyle(PassRefPtrWillBeRawPtr<StyleRuleKeyframes> rule) |
| { |
| AtomicString s(rule->name()); |
| if (rule->isVendorPrefixed()) { |
| KeyframesRuleMap::iterator it = m_keyframesRuleMap.find(rule->name().impl()); |
| if (it == m_keyframesRuleMap.end()) |
| m_keyframesRuleMap.set(s.impl(), rule); |
| else if (it->value->isVendorPrefixed()) |
| m_keyframesRuleMap.set(s.impl(), rule); |
| } else { |
| m_keyframesRuleMap.set(s.impl(), rule); |
| } |
| } |
| |
| void ScopedStyleResolver::collectMatchingAuthorRules(ElementRuleCollector& collector, bool includeEmptyRules, bool applyAuthorStyles, CascadeScope cascadeScope, CascadeOrder cascadeOrder) |
| { |
| unsigned contextFlags = SelectorChecker::DefaultBehavior; |
| |
| if (!applyAuthorStyles) |
| contextFlags |= SelectorChecker::ScopeContainsLastMatchedElement; |
| |
| RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange(); |
| for (size_t i = 0; i < m_authorStyleSheets.size(); ++i) { |
| MatchRequest matchRequest(&m_authorStyleSheets[i]->contents()->ruleSet(), includeEmptyRules, &m_scope->rootNode(), m_authorStyleSheets[i], applyAuthorStyles, i); |
| collector.collectMatchingRules(matchRequest, ruleRange, static_cast<SelectorChecker::ContextFlags>(contextFlags), cascadeScope, cascadeOrder); |
| } |
| } |
| |
| void ScopedStyleResolver::matchPageRules(PageRuleCollector& collector) |
| { |
| // Only consider the global author RuleSet for @page rules, as per the HTML5 spec. |
| ASSERT(m_scope->rootNode().isDocumentNode()); |
| for (size_t i = 0; i < m_authorStyleSheets.size(); ++i) |
| collector.matchPageRules(&m_authorStyleSheets[i]->contents()->ruleSet()); |
| } |
| |
| void ScopedStyleResolver::collectViewportRulesTo(StyleResolver* resolver) const |
| { |
| if (!m_scope->rootNode().isDocumentNode()) |
| return; |
| for (size_t i = 0; i < m_authorStyleSheets.size(); ++i) |
| resolver->viewportStyleResolver()->collectViewportRules(&m_authorStyleSheets[i]->contents()->ruleSet(), ViewportStyleResolver::AuthorOrigin); |
| } |
| |
| void ScopedStyleResolver::trace(Visitor* visitor) |
| { |
| #if ENABLE(OILPAN) |
| visitor->trace(m_scope); |
| visitor->trace(m_authorStyleSheets); |
| visitor->trace(m_keyframesRuleMap); |
| #endif |
| } |
| |
| } // namespace blink |