| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. |
| * All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef RuleSet_h |
| #define RuleSet_h |
| |
| #include "core/CoreExport.h" |
| #include "core/css/CSSKeyframesRule.h" |
| #include "core/css/MediaQueryEvaluator.h" |
| #include "core/css/RuleFeature.h" |
| #include "core/css/StyleRule.h" |
| #include "core/css/resolver/MediaQueryResult.h" |
| #include "platform/heap/HeapLinkedStack.h" |
| #include "platform/heap/HeapTerminatedArray.h" |
| #include "wtf/Forward.h" |
| #include "wtf/HashMap.h" |
| #include "wtf/LinkedStack.h" |
| #include "wtf/TerminatedArray.h" |
| |
| namespace blink { |
| |
| enum AddRuleFlags { |
| RuleHasNoSpecialState = 0, |
| RuleHasDocumentSecurityOrigin = 1, |
| }; |
| |
| enum PropertyWhitelistType { |
| PropertyWhitelistNone, |
| PropertyWhitelistCue, |
| PropertyWhitelistFirstLetter, |
| }; |
| |
| class CSSSelector; |
| class MediaQueryEvaluator; |
| class StyleSheetContents; |
| |
| class MinimalRuleData { |
| DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(); |
| |
| public: |
| MinimalRuleData(StyleRule* rule, unsigned selectorIndex, AddRuleFlags flags) |
| : m_rule(rule), m_selectorIndex(selectorIndex), m_flags(flags) {} |
| |
| DECLARE_TRACE(); |
| |
| Member<StyleRule> m_rule; |
| unsigned m_selectorIndex; |
| AddRuleFlags m_flags; |
| }; |
| |
| } // namespace blink |
| |
| WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(blink::MinimalRuleData); |
| |
| namespace blink { |
| |
| class CORE_EXPORT RuleData { |
| DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(); |
| |
| public: |
| RuleData(StyleRule*, unsigned selectorIndex, unsigned position, AddRuleFlags); |
| |
| unsigned position() const { return m_position; } |
| StyleRule* rule() const { return m_rule; } |
| const CSSSelector& selector() const { |
| return m_rule->selectorList().selectorAt(m_selectorIndex); |
| } |
| unsigned selectorIndex() const { return m_selectorIndex; } |
| |
| bool isLastInArray() const { return m_isLastInArray; } |
| void setLastInArray(bool flag) { m_isLastInArray = flag; } |
| |
| bool containsUncommonAttributeSelector() const { |
| return m_containsUncommonAttributeSelector; |
| } |
| unsigned specificity() const { return m_specificity; } |
| unsigned linkMatchType() const { return m_linkMatchType; } |
| bool hasDocumentSecurityOrigin() const { return m_hasDocumentSecurityOrigin; } |
| PropertyWhitelistType propertyWhitelist( |
| bool isMatchingUARules = false) const { |
| return isMatchingUARules |
| ? PropertyWhitelistNone |
| : static_cast<PropertyWhitelistType>(m_propertyWhitelist); |
| } |
| // Try to balance between memory usage (there can be lots of RuleData objects) |
| // and good filtering performance. |
| static const unsigned maximumIdentifierCount = 4; |
| const unsigned* descendantSelectorIdentifierHashes() const { |
| return m_descendantSelectorIdentifierHashes; |
| } |
| |
| DECLARE_TRACE(); |
| |
| private: |
| Member<StyleRule> m_rule; |
| unsigned m_selectorIndex : 13; |
| // We store an array of RuleData objects in a primitive array. |
| unsigned m_isLastInArray : 1; |
| // This number was picked fairly arbitrarily. We can probably lower it if we |
| // need to. Some simple testing showed <100,000 RuleData's on large sites. |
| unsigned m_position : 18; |
| unsigned m_specificity : 24; |
| unsigned m_containsUncommonAttributeSelector : 1; |
| unsigned m_linkMatchType : 2; // CSSSelector::LinkMatchMask |
| unsigned m_hasDocumentSecurityOrigin : 1; |
| unsigned m_propertyWhitelist : 2; |
| // Use plain array instead of a Vector to minimize memory overhead. |
| unsigned m_descendantSelectorIdentifierHashes[maximumIdentifierCount]; |
| }; |
| |
| } // namespace blink |
| |
| WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(blink::RuleData); |
| |
| namespace blink { |
| |
| struct SameSizeAsRuleData { |
| DISALLOW_NEW(); |
| Member<void*> a; |
| unsigned b; |
| unsigned c; |
| unsigned d[4]; |
| }; |
| |
| static_assert(sizeof(RuleData) == sizeof(SameSizeAsRuleData), |
| "RuleData should stay small"); |
| |
| class CORE_EXPORT RuleSet : public GarbageCollectedFinalized<RuleSet> { |
| WTF_MAKE_NONCOPYABLE(RuleSet); |
| |
| public: |
| static RuleSet* create() { return new RuleSet; } |
| |
| void addRulesFromSheet(StyleSheetContents*, |
| const MediaQueryEvaluator&, |
| AddRuleFlags = RuleHasNoSpecialState); |
| void addStyleRule(StyleRule*, AddRuleFlags); |
| void addRule(StyleRule*, unsigned selectorIndex, AddRuleFlags); |
| |
| const RuleFeatureSet& features() const { return m_features; } |
| |
| const HeapTerminatedArray<RuleData>* idRules(const AtomicString& key) const { |
| ASSERT(!m_pendingRules); |
| return m_idRules.get(key); |
| } |
| const HeapTerminatedArray<RuleData>* classRules( |
| const AtomicString& key) const { |
| ASSERT(!m_pendingRules); |
| return m_classRules.get(key); |
| } |
| const HeapTerminatedArray<RuleData>* tagRules(const AtomicString& key) const { |
| ASSERT(!m_pendingRules); |
| return m_tagRules.get(key); |
| } |
| const HeapTerminatedArray<RuleData>* shadowPseudoElementRules( |
| const AtomicString& key) const { |
| ASSERT(!m_pendingRules); |
| return m_shadowPseudoElementRules.get(key); |
| } |
| const HeapVector<RuleData>* linkPseudoClassRules() const { |
| ASSERT(!m_pendingRules); |
| return &m_linkPseudoClassRules; |
| } |
| const HeapVector<RuleData>* cuePseudoRules() const { |
| ASSERT(!m_pendingRules); |
| return &m_cuePseudoRules; |
| } |
| const HeapVector<RuleData>* focusPseudoClassRules() const { |
| ASSERT(!m_pendingRules); |
| return &m_focusPseudoClassRules; |
| } |
| const HeapVector<RuleData>* placeholderPseudoRules() const { |
| DCHECK(!m_pendingRules); |
| return &m_placeholderPseudoRules; |
| } |
| const HeapVector<RuleData>* universalRules() const { |
| ASSERT(!m_pendingRules); |
| return &m_universalRules; |
| } |
| const HeapVector<RuleData>* shadowHostRules() const { |
| ASSERT(!m_pendingRules); |
| return &m_shadowHostRules; |
| } |
| const HeapVector<Member<StyleRulePage>>& pageRules() const { |
| ASSERT(!m_pendingRules); |
| return m_pageRules; |
| } |
| const HeapVector<Member<StyleRuleFontFace>>& fontFaceRules() const { |
| return m_fontFaceRules; |
| } |
| const HeapVector<Member<StyleRuleKeyframes>>& keyframesRules() const { |
| return m_keyframesRules; |
| } |
| const HeapVector<MinimalRuleData>& deepCombinatorOrShadowPseudoRules() const { |
| return m_deepCombinatorOrShadowPseudoRules; |
| } |
| const HeapVector<MinimalRuleData>& contentPseudoElementRules() const { |
| return m_contentPseudoElementRules; |
| } |
| const HeapVector<MinimalRuleData>& slottedPseudoElementRules() const { |
| return m_slottedPseudoElementRules; |
| } |
| const MediaQueryResultList& viewportDependentMediaQueryResults() const { |
| return m_viewportDependentMediaQueryResults; |
| } |
| const MediaQueryResultList& deviceDependentMediaQueryResults() const { |
| return m_deviceDependentMediaQueryResults; |
| } |
| |
| unsigned ruleCount() const { return m_ruleCount; } |
| |
| void compactRulesIfNeeded() { |
| if (!m_pendingRules) |
| return; |
| compactRules(); |
| } |
| |
| bool hasSlottedRules() const { |
| return !m_slottedPseudoElementRules.isEmpty(); |
| } |
| |
| bool hasV0BoundaryCrossingRules() const { |
| return !m_deepCombinatorOrShadowPseudoRules.isEmpty() || |
| !m_contentPseudoElementRules.isEmpty(); |
| } |
| |
| bool needsFullRecalcForRuleSetInvalidation() const { |
| return m_features.needsFullRecalcForRuleSetInvalidation() || |
| hasV0BoundaryCrossingRules(); |
| } |
| |
| #ifndef NDEBUG |
| void show() const; |
| #endif |
| |
| DECLARE_TRACE(); |
| |
| private: |
| using PendingRuleMap = |
| HeapHashMap<AtomicString, Member<HeapLinkedStack<RuleData>>>; |
| using CompactRuleMap = |
| HeapHashMap<AtomicString, Member<HeapTerminatedArray<RuleData>>>; |
| |
| RuleSet() : m_ruleCount(0) {} |
| |
| void addToRuleSet(const AtomicString& key, PendingRuleMap&, const RuleData&); |
| void addPageRule(StyleRulePage*); |
| void addViewportRule(StyleRuleViewport*); |
| void addFontFaceRule(StyleRuleFontFace*); |
| void addKeyframesRule(StyleRuleKeyframes*); |
| |
| void addChildRules(const HeapVector<Member<StyleRuleBase>>&, |
| const MediaQueryEvaluator& medium, |
| AddRuleFlags); |
| bool findBestRuleSetAndAdd(const CSSSelector&, RuleData&); |
| |
| void compactRules(); |
| static void compactPendingRules(PendingRuleMap&, CompactRuleMap&); |
| |
| class PendingRuleMaps : public GarbageCollected<PendingRuleMaps> { |
| public: |
| static PendingRuleMaps* create() { return new PendingRuleMaps; } |
| |
| PendingRuleMap idRules; |
| PendingRuleMap classRules; |
| PendingRuleMap tagRules; |
| PendingRuleMap shadowPseudoElementRules; |
| |
| DECLARE_TRACE(); |
| |
| private: |
| PendingRuleMaps() {} |
| }; |
| |
| PendingRuleMaps* ensurePendingRules() { |
| if (!m_pendingRules) |
| m_pendingRules = PendingRuleMaps::create(); |
| return m_pendingRules.get(); |
| } |
| |
| CompactRuleMap m_idRules; |
| CompactRuleMap m_classRules; |
| CompactRuleMap m_tagRules; |
| CompactRuleMap m_shadowPseudoElementRules; |
| HeapVector<RuleData> m_linkPseudoClassRules; |
| HeapVector<RuleData> m_cuePseudoRules; |
| HeapVector<RuleData> m_focusPseudoClassRules; |
| HeapVector<RuleData> m_placeholderPseudoRules; |
| HeapVector<RuleData> m_universalRules; |
| HeapVector<RuleData> m_shadowHostRules; |
| RuleFeatureSet m_features; |
| HeapVector<Member<StyleRulePage>> m_pageRules; |
| HeapVector<Member<StyleRuleFontFace>> m_fontFaceRules; |
| HeapVector<Member<StyleRuleKeyframes>> m_keyframesRules; |
| HeapVector<MinimalRuleData> m_deepCombinatorOrShadowPseudoRules; |
| HeapVector<MinimalRuleData> m_contentPseudoElementRules; |
| HeapVector<MinimalRuleData> m_slottedPseudoElementRules; |
| |
| MediaQueryResultList m_viewportDependentMediaQueryResults; |
| MediaQueryResultList m_deviceDependentMediaQueryResults; |
| |
| unsigned m_ruleCount; |
| Member<PendingRuleMaps> m_pendingRules; |
| |
| #ifndef NDEBUG |
| HeapVector<RuleData> m_allRules; |
| #endif |
| }; |
| |
| } // namespace blink |
| |
| #endif // RuleSet_h |