| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2001 Dirk Mueller (mueller@kde.org) |
| * (C) 2006 Alexey Proskuryakov (ap@webkit.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All |
| * rights reserved. |
| * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. |
| * (http://www.torchmobile.com/) |
| * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) |
| * Copyright (C) 2011 Google 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 StyleEngine_h |
| #define StyleEngine_h |
| |
| #include "bindings/core/v8/ScriptWrappable.h" |
| #include "bindings/core/v8/TraceWrapperMember.h" |
| #include "core/CoreExport.h" |
| #include "core/css/ActiveStyleSheets.h" |
| #include "core/css/CSSFontSelectorClient.h" |
| #include "core/css/CSSGlobalRuleSet.h" |
| #include "core/css/invalidation/StyleInvalidator.h" |
| #include "core/css/resolver/StyleResolver.h" |
| #include "core/css/resolver/StyleResolverStats.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/DocumentOrderedList.h" |
| #include "core/dom/DocumentStyleSheetCollection.h" |
| #include "core/dom/StyleEngineContext.h" |
| #include "platform/heap/Handle.h" |
| #include "wtf/Allocator.h" |
| #include "wtf/AutoReset.h" |
| #include "wtf/ListHashSet.h" |
| #include "wtf/Vector.h" |
| #include "wtf/text/WTFString.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| class CSSFontSelector; |
| class CSSStyleSheet; |
| class MediaQueryEvaluator; |
| class Node; |
| class RuleFeatureSet; |
| class ShadowTreeStyleSheetCollection; |
| class StyleRuleFontFace; |
| class StyleRuleUsageTracker; |
| class StyleSheet; |
| class StyleSheetContents; |
| class ViewportStyleResolver; |
| |
| class CORE_EXPORT StyleEngine final |
| : public GarbageCollectedFinalized<StyleEngine>, |
| public CSSFontSelectorClient, |
| public TraceWrapperBase { |
| USING_GARBAGE_COLLECTED_MIXIN(StyleEngine); |
| |
| public: |
| class IgnoringPendingStylesheet { |
| DISALLOW_NEW(); |
| |
| public: |
| IgnoringPendingStylesheet(StyleEngine& engine) |
| : m_scope(&engine.m_ignorePendingStylesheets, true) {} |
| |
| private: |
| AutoReset<bool> m_scope; |
| }; |
| |
| friend class IgnoringPendingStylesheet; |
| |
| static StyleEngine* create(Document& document) { |
| return new StyleEngine(document); |
| } |
| |
| ~StyleEngine(); |
| |
| const HeapVector<TraceWrapperMember<StyleSheet>>& |
| styleSheetsForStyleSheetList(TreeScope&); |
| |
| const HeapVector<TraceWrapperMember<CSSStyleSheet>>& |
| injectedAuthorStyleSheets() const { |
| return m_injectedAuthorStyleSheets; |
| } |
| CSSStyleSheet* inspectorStyleSheet() const { return m_inspectorStyleSheet; } |
| |
| const HeapVector<Member<CSSStyleSheet>> activeStyleSheetsForInspector() const; |
| |
| bool needsActiveStyleUpdate() const; |
| void setNeedsActiveStyleUpdate(StyleSheet*, StyleResolverUpdateMode); |
| void addStyleSheetCandidateNode(Node&); |
| void removeStyleSheetCandidateNode(Node&); |
| void removeStyleSheetCandidateNode(Node&, TreeScope&); |
| void modifiedStyleSheetCandidateNode(Node&); |
| void watchedSelectorsChanged(); |
| void initialViewportChanged(); |
| void viewportRulesChanged(); |
| void importRemoved(); |
| |
| void injectAuthorSheet(StyleSheetContents* authorSheet); |
| CSSStyleSheet& ensureInspectorStyleSheet(); |
| RuleSet* watchedSelectorsRuleSet() { |
| return m_globalRuleSet.watchedSelectorsRuleSet(); |
| } |
| |
| void mediaQueryAffectingValueChanged(); |
| void updateStyleSheetsInImport(DocumentStyleSheetCollector& parentCollector); |
| void updateActiveStyleSheets(StyleResolverUpdateMode); |
| void updateActiveStyle(); |
| |
| enum ActiveSheetsUpdate { DontUpdateActiveSheets, UpdateActiveSheets }; |
| String preferredStylesheetSetName() const { |
| return m_preferredStylesheetSetName; |
| } |
| String selectedStylesheetSetName() const { |
| return m_selectedStylesheetSetName; |
| } |
| void setPreferredStylesheetSetNameIfNotSet(const String&, ActiveSheetsUpdate); |
| void setSelectedStylesheetSetName(const String&); |
| void setHttpDefaultStyle(const String&); |
| |
| void addPendingSheet(StyleEngineContext&); |
| void removePendingSheet(Node& styleSheetCandidateNode, |
| const StyleEngineContext&); |
| |
| bool hasPendingScriptBlockingSheets() const { |
| return m_pendingScriptBlockingStylesheets > 0; |
| } |
| bool hasPendingRenderBlockingSheets() const { |
| return m_pendingRenderBlockingStylesheets > 0; |
| } |
| bool haveScriptBlockingStylesheetsLoaded() const { |
| return !hasPendingScriptBlockingSheets() || m_ignorePendingStylesheets; |
| } |
| bool haveRenderBlockingStylesheetsLoaded() const { |
| return !hasPendingRenderBlockingSheets() || m_ignorePendingStylesheets; |
| } |
| bool ignoringPendingStylesheets() const { return m_ignorePendingStylesheets; } |
| |
| unsigned maxDirectAdjacentSelectors() const { |
| return ruleFeatureSet().maxDirectAdjacentSelectors(); |
| } |
| bool usesSiblingRules() const { return ruleFeatureSet().usesSiblingRules(); } |
| bool usesFirstLineRules() const { |
| return ruleFeatureSet().usesFirstLineRules(); |
| } |
| bool usesWindowInactiveSelector() const { |
| return ruleFeatureSet().usesWindowInactiveSelector(); |
| } |
| |
| bool usesRemUnits() const { return m_usesRemUnits; } |
| void setUsesRemUnit(bool usesRemUnits) { m_usesRemUnits = usesRemUnits; } |
| |
| void resetCSSFeatureFlags(const RuleFeatureSet&); |
| |
| void shadowRootRemovedFromDocument(ShadowRoot*); |
| void addTreeBoundaryCrossingScope(const TreeScope&); |
| const DocumentOrderedList& treeBoundaryCrossingScopes() const { |
| return m_treeBoundaryCrossingScopes; |
| } |
| void resetAuthorStyle(TreeScope&); |
| |
| StyleResolver* resolver() const { return m_resolver; } |
| |
| void setRuleUsageTracker(StyleRuleUsageTracker*); |
| |
| StyleResolver& ensureResolver() { |
| updateActiveStyle(); |
| if (!m_resolver) { |
| createResolver(); |
| } else if (m_resolver->hasPendingAuthorStyleSheets()) { |
| m_resolver->appendPendingAuthorStyleSheets(); |
| finishAppendAuthorStyleSheets(); |
| } else if (m_globalRuleSet.isDirty()) { |
| m_globalRuleSet.update(document()); |
| } |
| return *m_resolver; |
| } |
| |
| bool hasResolver() const { return m_resolver; } |
| void clearResolver(); |
| void clearMasterResolver(); |
| |
| StyleInvalidator& styleInvalidator() { return m_styleInvalidator; } |
| const MediaQueryEvaluator& ensureMediaQueryEvaluator(); |
| |
| CSSFontSelector* fontSelector() { return m_fontSelector; } |
| void setFontSelector(CSSFontSelector*); |
| |
| void removeFontFaceRules(const HeapVector<Member<const StyleRuleFontFace>>&); |
| void clearFontCache(); |
| // updateGenericFontFamilySettings is used from WebSettingsImpl. |
| void updateGenericFontFamilySettings(); |
| |
| void didDetach(); |
| bool shouldClearResolver() const; |
| void resolverChanged(StyleResolverUpdateMode); |
| |
| CSSStyleSheet* createSheet(Element&, |
| const String& text, |
| TextPosition startPosition, |
| StyleEngineContext&); |
| |
| void collectScopedStyleFeaturesTo(RuleFeatureSet&) const; |
| void ensureUAStyleForFullscreen(); |
| void ensureUAStyleForElement(const Element&); |
| |
| void platformColorsChanged(); |
| |
| bool hasRulesForId(const AtomicString& id) const; |
| void classChangedForElement(const SpaceSplitString& changedClasses, Element&); |
| void classChangedForElement(const SpaceSplitString& oldClasses, |
| const SpaceSplitString& newClasses, |
| Element&); |
| void attributeChangedForElement(const QualifiedName& attributeName, Element&); |
| void idChangedForElement(const AtomicString& oldId, |
| const AtomicString& newId, |
| Element&); |
| void pseudoStateChangedForElement(CSSSelector::PseudoType, Element&); |
| void scheduleSiblingInvalidationsForElement(Element&, |
| ContainerNode& schedulingParent, |
| unsigned minDirectAdjacent); |
| void scheduleInvalidationsForInsertedSibling(Element* beforeElement, |
| Element& insertedElement); |
| void scheduleInvalidationsForRemovedSibling(Element* beforeElement, |
| Element& removedElement, |
| Element& afterElement); |
| void scheduleNthPseudoInvalidations(ContainerNode&); |
| void scheduleInvalidationsForRuleSets(TreeScope&, |
| const HeapVector<Member<RuleSet>>&); |
| |
| unsigned styleForElementCount() const { return m_styleForElementCount; } |
| void incStyleForElementCount() { m_styleForElementCount++; } |
| |
| StyleResolverStats* stats() { return m_styleResolverStats.get(); } |
| void setStatsEnabled(bool); |
| |
| PassRefPtr<ComputedStyle> findSharedStyle(const ElementResolveContext&); |
| |
| void applyRuleSetChanges(TreeScope&, |
| const ActiveStyleSheetVector& oldStyleSheets, |
| const ActiveStyleSheetVector& newStyleSheets); |
| |
| DECLARE_VIRTUAL_TRACE(); |
| DECLARE_TRACE_WRAPPERS(); |
| |
| private: |
| // CSSFontSelectorClient implementation. |
| void fontsNeedUpdate(CSSFontSelector*) override; |
| |
| private: |
| StyleEngine(Document&); |
| |
| TreeScopeStyleSheetCollection* ensureStyleSheetCollectionFor(TreeScope&); |
| TreeScopeStyleSheetCollection* styleSheetCollectionFor(TreeScope&); |
| bool shouldUpdateDocumentStyleSheetCollection(StyleResolverUpdateMode) const; |
| bool shouldUpdateShadowTreeStyleSheetCollection( |
| StyleResolverUpdateMode) const; |
| |
| void markDocumentDirty(); |
| void markTreeScopeDirty(TreeScope&); |
| |
| bool isMaster() const { return m_isMaster; } |
| Document* master(); |
| Document& document() const { return *m_document; } |
| |
| typedef HeapHashSet<Member<TreeScope>> UnorderedTreeScopeSet; |
| |
| void mediaQueryAffectingValueChanged(UnorderedTreeScopeSet&); |
| const RuleFeatureSet& ruleFeatureSet() const { |
| return m_globalRuleSet.ruleFeatureSet(); |
| } |
| |
| void createResolver(); |
| void appendActiveAuthorStyleSheets(); |
| void finishAppendAuthorStyleSheets(); |
| |
| CSSStyleSheet* parseSheet(Element&, |
| const String& text, |
| TextPosition startPosition); |
| |
| const DocumentStyleSheetCollection& documentStyleSheetCollection() const { |
| DCHECK(m_documentStyleSheetCollection); |
| return *m_documentStyleSheetCollection; |
| } |
| |
| DocumentStyleSheetCollection& documentStyleSheetCollection() { |
| DCHECK(m_documentStyleSheetCollection); |
| return *m_documentStyleSheetCollection; |
| } |
| |
| void updateActiveStyleSheetsInShadow( |
| StyleResolverUpdateMode, |
| TreeScope*, |
| UnorderedTreeScopeSet& treeScopesRemoved); |
| |
| bool shouldSkipInvalidationFor(const Element&) const; |
| void scheduleRuleSetInvalidationsForElement( |
| Element&, |
| const HeapVector<Member<RuleSet>>&); |
| void invalidateSlottedElements(HTMLSlotElement&); |
| |
| void updateViewport(); |
| void updateActiveStyleSheets(); |
| |
| Member<Document> m_document; |
| bool m_isMaster; |
| |
| // Track the number of currently loading top-level stylesheets needed for |
| // layout. Sheets loaded using the @import directive are not included in this |
| // count. We use this count of pending sheets to detect when we can begin |
| // attaching elements and when it is safe to execute scripts. |
| int m_pendingScriptBlockingStylesheets = 0; |
| int m_pendingRenderBlockingStylesheets = 0; |
| |
| HeapVector<TraceWrapperMember<CSSStyleSheet>> m_injectedAuthorStyleSheets; |
| Member<CSSStyleSheet> m_inspectorStyleSheet; |
| |
| TraceWrapperMember<DocumentStyleSheetCollection> |
| m_documentStyleSheetCollection; |
| |
| Member<StyleRuleUsageTracker> m_tracker; |
| |
| typedef HeapHashMap<WeakMember<TreeScope>, |
| Member<ShadowTreeStyleSheetCollection>> |
| StyleSheetCollectionMap; |
| StyleSheetCollectionMap m_styleSheetCollectionMap; |
| |
| bool m_documentScopeDirty = true; |
| UnorderedTreeScopeSet m_dirtyTreeScopes; |
| UnorderedTreeScopeSet m_activeTreeScopes; |
| DocumentOrderedList m_treeBoundaryCrossingScopes; |
| |
| String m_preferredStylesheetSetName; |
| String m_selectedStylesheetSetName; |
| |
| CSSGlobalRuleSet m_globalRuleSet; |
| |
| bool m_usesRemUnits = false; |
| bool m_ignorePendingStylesheets = false; |
| bool m_didCalculateResolver = false; |
| |
| Member<StyleResolver> m_resolver; |
| Member<ViewportStyleResolver> m_viewportResolver; |
| Member<MediaQueryEvaluator> m_mediaQueryEvaluator; |
| StyleInvalidator m_styleInvalidator; |
| |
| Member<CSSFontSelector> m_fontSelector; |
| |
| HeapHashMap<AtomicString, WeakMember<StyleSheetContents>> m_textToSheetCache; |
| HeapHashMap<WeakMember<StyleSheetContents>, AtomicString> m_sheetToTextCache; |
| |
| std::unique_ptr<StyleResolverStats> m_styleResolverStats; |
| unsigned m_styleForElementCount = 0; |
| |
| friend class StyleEngineTest; |
| }; |
| |
| } // namespace blink |
| |
| #endif |