| /* |
| * 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. |
| */ |
| |
| #ifndef ScopedStyleResolver_h |
| #define ScopedStyleResolver_h |
| |
| #include "core/css/CSSRuleList.h" |
| #include "core/css/CSSToStyleMap.h" |
| #include "core/css/CSSValueList.h" |
| #include "core/css/DocumentRuleSets.h" |
| #include "core/css/InspectorCSSOMWrappers.h" |
| #include "core/css/MediaQueryExp.h" |
| #include "core/css/RuleFeature.h" |
| #include "core/css/RuleSet.h" |
| #include "core/css/SelectorChecker.h" |
| #include "core/css/SelectorFilter.h" |
| #include "core/css/SiblingTraversalStrategies.h" |
| #include "core/css/WebKitCSSSVGDocumentValue.h" |
| #include "core/css/WebKitCSSKeyframeRule.h" |
| #include "core/css/WebKitCSSKeyframesRule.h" |
| #include "core/css/resolver/ViewportStyleResolver.h" |
| #include "core/platform/LinkHash.h" |
| #include "core/platform/ScrollTypes.h" |
| #include "core/platform/graphics/filters/custom/CustomFilterConstants.h" |
| #include "core/rendering/style/RenderStyle.h" |
| #include "core/rendering/style/StyleInheritedData.h" |
| #include "wtf/Assertions.h" |
| #include "wtf/Forward.h" |
| #include "wtf/HashMap.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/Vector.h" |
| |
| namespace WebCore { |
| |
| class ContainerNode; |
| class ElementRuleCollector; |
| class MediaQueryEvaluator; |
| class PageRuleCollector; |
| class ScopedStyleResolver; |
| class ShadowRoot; |
| class StyleSheetContents; |
| |
| // This class selects a RenderStyle for a given element based on a collection of stylesheets. |
| class ScopedStyleResolver { |
| WTF_MAKE_NONCOPYABLE(ScopedStyleResolver); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| static PassOwnPtr<ScopedStyleResolver> create(const ContainerNode* scope) { return adoptPtr(new ScopedStyleResolver(scope)); } |
| |
| static const ContainerNode* scopeFor(const CSSStyleSheet*); |
| |
| // methods for building tree. |
| const ContainerNode* scope() const { return m_scope; } |
| const TreeScope* treeScope() const { return m_scope->treeScope(); } |
| void prepareEmptyRuleSet() { m_authorStyle = RuleSet::create(); } |
| void setParent(ScopedStyleResolver* newParent) { m_parent = newParent; } |
| ScopedStyleResolver* parent() { return m_parent; } |
| |
| public: |
| bool checkRegionStyle(Element*); |
| |
| void matchHostRules(ElementRuleCollector&, bool includeEmptyRules); |
| void matchAuthorRules(ElementRuleCollector&, bool includeEmptyRules, bool applyAuthorStyles); |
| void matchPageRules(PageRuleCollector&); |
| void addRulesFromSheet(StyleSheetContents*, const MediaQueryEvaluator&, StyleResolver*); |
| void postAddRulesFromSheet() { m_authorStyle->shrinkToFit(); } |
| void addHostRule(StyleRuleHost*, bool hasDocumentSecurityOrigin, const ContainerNode* scope); |
| void collectFeaturesTo(RuleFeatureSet&); |
| void resetAuthorStyle(); |
| void reportMemoryUsage(MemoryObjectInfo*) const; |
| |
| private: |
| ScopedStyleResolver() : m_scope(0), m_parent(0) { } |
| ScopedStyleResolver(const ContainerNode* scope) : m_scope(scope), m_parent(0) { } |
| |
| RuleSet* ensureAtHostRuleSetFor(const ShadowRoot*); |
| RuleSet* atHostRuleSetFor(const ShadowRoot*) const; |
| |
| const ContainerNode* m_scope; |
| ScopedStyleResolver* m_parent; |
| |
| OwnPtr<RuleSet> m_authorStyle; |
| HashMap<const ShadowRoot*, OwnPtr<RuleSet> > m_atHostRules; |
| }; |
| |
| class ScopedStyleTree { |
| WTF_MAKE_NONCOPYABLE(ScopedStyleTree); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| ScopedStyleTree() : m_scopeResolverForDocument(0) { } |
| |
| ScopedStyleResolver* ensureScopedStyleResolver(const ContainerNode* scope); |
| ScopedStyleResolver* scopedStyleResolverFor(const ContainerNode* scope); |
| ScopedStyleResolver* addScopedStyleResolver(const ContainerNode* scope, bool& isNewEntry); |
| void clear(); |
| |
| // for fast-path. |
| bool hasOnlyScopeResolverForDocument() const { return m_scopeResolverForDocument && m_authorStyles.size() == 1; } |
| ScopedStyleResolver* scopedStyleResolverForDocument() { return m_scopeResolverForDocument; } |
| |
| void resolveScopeStyles(const Element*, Vector<std::pair<ScopedStyleResolver*, bool>, 8>& resolvers); |
| ScopedStyleResolver* scopedResolverFor(const Element*); |
| |
| void pushStyleCache(const ContainerNode* scope, const ContainerNode* parent); |
| void popStyleCache(const ContainerNode* scope); |
| |
| void collectFeaturesTo(RuleFeatureSet& features); |
| |
| void reportMemoryUsage(MemoryObjectInfo*) const; |
| private: |
| void setupScopeStylesTree(ScopedStyleResolver* target); |
| |
| bool cacheIsValid(const ContainerNode* parent) const { return parent && parent == m_cache.nodeForScopeStyles; } |
| void resolveStyleCache(const ContainerNode* scope); |
| ScopedStyleResolver* enclosingScopedStyleResolverFor(const ContainerNode* scope, int& authorStyleBoundsIndex); |
| |
| private: |
| HashMap<const ContainerNode*, OwnPtr<ScopedStyleResolver> > m_authorStyles; |
| ScopedStyleResolver* m_scopeResolverForDocument; |
| |
| struct ScopeStyleCache { |
| ScopedStyleResolver* scopeResolver; |
| int scopeResolverBoundsIndex; |
| const ContainerNode* nodeForScopeStyles; |
| int authorStyleBoundsIndex; |
| |
| void clear() |
| { |
| scopeResolver = 0; |
| scopeResolverBoundsIndex = 0; |
| nodeForScopeStyles = 0; |
| authorStyleBoundsIndex = 0; |
| } |
| }; |
| ScopeStyleCache m_cache; |
| }; |
| |
| inline ScopedStyleResolver* ScopedStyleTree::scopedResolverFor(const Element* element) |
| { |
| if (!cacheIsValid(element)) |
| resolveStyleCache(element); |
| |
| return m_cache.scopeResolver; |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ScopedStyleResolver_h |