diff -r 000000000000 -r 4f2f89ce4247 WebCore/css/CSSStyleSelector.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/WebCore/css/CSSStyleSelector.h Fri Sep 17 09:02:29 2010 +0300 @@ -0,0 +1,375 @@ +/* + * Copyright (C) 1999 Lars Knoll (knoll@kde.org) + * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 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 CSSStyleSelector_h +#define CSSStyleSelector_h + +#include "CSSFontSelector.h" +#include "LinkHash.h" +#include "MediaQueryExp.h" +#include "RenderStyle.h" +#include "StringHash.h" +#include +#include +#include +#include + +namespace WebCore { + +class CSSMutableStyleDeclaration; +class CSSPageRule; +class CSSPrimitiveValue; +class CSSProperty; +class CSSFontFace; +class CSSFontFaceRule; +class CSSRuleData; +class CSSRuleDataList; +class CSSRuleList; +class CSSRuleSet; +class CSSSelector; +class CSSStyleRule; +class CSSStyleSheet; +class CSSValue; +class CSSVariableDependentValue; +class CSSVariablesRule; +class DataGridColumn; +class Document; +class Element; +class Frame; +class FrameView; +class KURL; +class KeyframeList; +class MediaQueryEvaluator; +class Node; +class Settings; +class StyleImage; +class StyleSheet; +class StyleSheetList; +class StyledElement; +class WebKitCSSKeyframeRule; +class WebKitCSSKeyframesRule; + +class MediaQueryResult : public Noncopyable { +public: + MediaQueryResult(const MediaQueryExp& expr, bool result) + : m_expression(expr) + , m_result(result) + { + } + + MediaQueryExp m_expression; + bool m_result; +}; + + // This class selects a RenderStyle for a given element based on a collection of stylesheets. + class CSSStyleSelector : public Noncopyable { + public: + CSSStyleSelector(Document*, StyleSheetList* authorSheets, CSSStyleSheet* mappedElementSheet, + CSSStyleSheet* pageUserSheet, const Vector >* pageGroupUserSheets, + bool strictParsing, bool matchAuthorAndUserStyles); + ~CSSStyleSelector(); + + PassRefPtr styleForElement(Element* e, RenderStyle* parentStyle = 0, bool allowSharing = true, bool resolveForRootDefault = false, bool matchVisitedPseudoClass = false); + + void keyframeStylesForAnimation(Element*, const RenderStyle*, KeyframeList& list); + + PassRefPtr pseudoStyleForElement(PseudoId pseudo, Element* e, RenderStyle* parentStyle = 0, bool matchVisitedPseudoClass = false); + + PassRefPtr styleForPage(int pageIndex); + + static PassRefPtr styleForDocument(Document*); + +#if ENABLE(DATAGRID) + // Datagrid style computation (uses unique pseudo elements and structures) + PassRefPtr pseudoStyleForDataGridColumn(DataGridColumn*, RenderStyle* parentStyle); + PassRefPtr pseudoStyleForDataGridColumnHeader(DataGridColumn*, RenderStyle* parentStyle); +#endif + + private: + void initForStyleResolve(Element*, RenderStyle* parentStyle = 0, PseudoId = NOPSEUDO); + void initElement(Element*); + RenderStyle* locateSharedStyle(); + Node* locateCousinList(Element* parent, unsigned depth = 1); + bool canShareStyleWithElement(Node*); + + RenderStyle* style() const { return m_style.get(); } + + PassRefPtr styleForKeyframe(const RenderStyle*, const WebKitCSSKeyframeRule*, KeyframeList&); + + public: + // These methods will give back the set of rules that matched for a given element (or a pseudo-element). + PassRefPtr styleRulesForElement(Element*, bool authorOnly); + PassRefPtr pseudoStyleRulesForElement(Element*, PseudoId, bool authorOnly); + + private: + // Given a CSS keyword in the range (xx-small to -webkit-xxx-large), this function will return + // the correct font size scaled relative to the user's default (medium). + static float fontSizeForKeyword(Document*, int keyword, bool monospace); + + // When the CSS keyword "larger" is used, this function will attempt to match within the keyword + // table, and failing that, will simply multiply by 1.2. + float largerFontSize(float size, bool quirksMode) const; + + // Like the previous function, but for the keyword "smaller". + float smallerFontSize(float size, bool quirksMode) const; + + public: + void setStyle(PassRefPtr s) { m_style = s; } // Used by the document when setting up its root style. + + void applyPropertyToStyle(int id, CSSValue*, RenderStyle*); + + private: + void setFontSize(FontDescription&, float size); + static float getComputedSizeFromSpecifiedSize(Document*, RenderStyle*, bool isAbsoluteSize, float specifiedSize, bool useSVGZoomRules); + + public: + Color getColorFromPrimitiveValue(CSSPrimitiveValue*); + + bool hasSelectorForAttribute(const AtomicString&); + + CSSFontSelector* fontSelector() { return m_fontSelector.get(); } + + // Checks if a compound selector (which can consist of multiple simple selectors) matches the current element. + bool checkSelector(CSSSelector*); + + void addViewportDependentMediaQueryResult(const MediaQueryExp*, bool result); + + bool affectedByViewportChange() const; + + void allVisitedStateChanged() { m_checker.allVisitedStateChanged(); } + void visitedStateChanged(LinkHash visitedHash) { m_checker.visitedStateChanged(visitedHash); } + + void addVariables(CSSVariablesRule* variables); + CSSValue* resolveVariableDependentValue(CSSVariableDependentValue*); + void resolveVariablesForDeclaration(CSSMutableStyleDeclaration* decl, CSSMutableStyleDeclaration* newDecl, HashSet& usedBlockVariables); + + void addKeyframeStyle(PassRefPtr rule); + void addPageStyle(PassRefPtr); + + static bool createTransformOperations(CSSValue* inValue, RenderStyle* inStyle, RenderStyle* rootStyle, TransformOperations& outOperations); + + private: + enum SelectorMatch { SelectorMatches, SelectorFailsLocally, SelectorFailsCompletely }; + + // This function fixes up the default font size if it detects that the current generic font family has changed. -dwh + void checkForGenericFamilyChange(RenderStyle*, RenderStyle* parentStyle); + void checkForZoomChange(RenderStyle*, RenderStyle* parentStyle); + void checkForTextSizeAdjust(); + + void adjustRenderStyle(RenderStyle*, Element*); + + void addMatchedRule(CSSRuleData* rule) { m_matchedRules.append(rule); } + void addMatchedDeclaration(CSSMutableStyleDeclaration* decl); + + void matchRules(CSSRuleSet*, int& firstRuleIndex, int& lastRuleIndex); + void matchRulesForList(CSSRuleDataList*, int& firstRuleIndex, int& lastRuleIndex); + void sortMatchedRules(unsigned start, unsigned end); + + template + void applyDeclarations(bool important, int startIndex, int endIndex); + + void matchPageRules(CSSRuleSet*, bool isLeftPage, bool isFirstPage, const String& pageName); + void matchPageRulesForList(CSSRuleDataList*, bool isLeftPage, bool isFirstPage, const String& pageName); + bool isLeftPage(int pageIndex) const; + bool isRightPage(int pageIndex) const { return !isLeftPage(pageIndex); } + bool isFirstPage(int pageIndex) const; + String pageName(int pageIndex) const; + + CSSRuleSet* m_authorStyle; + CSSRuleSet* m_userStyle; + + bool m_hasUAAppearance; + BorderData m_borderData; + FillLayer m_backgroundData; + Color m_backgroundColor; + + typedef HashMap > KeyframesRuleMap; + KeyframesRuleMap m_keyframesRuleMap; + + public: + static RenderStyle* styleNotYetAvailable() { return s_styleNotYetAvailable; } + + class SelectorChecker : public Noncopyable { + public: + SelectorChecker(Document*, bool strictParsing); + + bool checkSelector(CSSSelector*, Element*) const; + SelectorMatch checkSelector(CSSSelector*, Element*, HashSet* selectorAttrs, PseudoId& dynamicPseudo, bool isSubSelector, bool encounteredLink, RenderStyle* = 0, RenderStyle* elementParentStyle = 0) const; + bool checkOneSelector(CSSSelector*, Element*, HashSet* selectorAttrs, PseudoId& dynamicPseudo, bool isSubSelector, RenderStyle*, RenderStyle* elementParentStyle) const; + bool checkScrollbarPseudoClass(CSSSelector*, PseudoId& dynamicPseudo) const; + + EInsideLink determineLinkState(Element* element) const; + EInsideLink determineLinkStateSlowCase(Element* element) const; + void allVisitedStateChanged(); + void visitedStateChanged(LinkHash visitedHash); + + Document* m_document; + bool m_strictParsing; + bool m_collectRulesOnly; + PseudoId m_pseudoStyle; + bool m_documentIsHTML; + mutable bool m_matchVisitedPseudoClass; + mutable HashSet m_linksCheckedForVisitedState; + }; + + private: + static RenderStyle* s_styleNotYetAvailable; + + void init(); + + void matchUARules(int& firstUARule, int& lastUARule); + void updateFont(); + void cacheBorderAndBackground(); + + void mapFillAttachment(FillLayer*, CSSValue*); + void mapFillClip(FillLayer*, CSSValue*); + void mapFillComposite(FillLayer*, CSSValue*); + void mapFillOrigin(FillLayer*, CSSValue*); + void mapFillImage(FillLayer*, CSSValue*); + void mapFillRepeatX(FillLayer*, CSSValue*); + void mapFillRepeatY(FillLayer*, CSSValue*); + void mapFillSize(FillLayer*, CSSValue*); + void mapFillXPosition(FillLayer*, CSSValue*); + void mapFillYPosition(FillLayer*, CSSValue*); + + void mapAnimationDelay(Animation*, CSSValue*); + void mapAnimationDirection(Animation*, CSSValue*); + void mapAnimationDuration(Animation*, CSSValue*); + void mapAnimationFillMode(Animation*, CSSValue*); + void mapAnimationIterationCount(Animation*, CSSValue*); + void mapAnimationName(Animation*, CSSValue*); + void mapAnimationPlayState(Animation*, CSSValue*); + void mapAnimationProperty(Animation*, CSSValue*); + void mapAnimationTimingFunction(Animation*, CSSValue*); + + void mapNinePieceImage(CSSValue*, NinePieceImage&); + + void applyProperty(int id, CSSValue*); + void applyPageSizeProperty(CSSValue*); + bool pageSizeFromName(CSSPrimitiveValue*, CSSPrimitiveValue*, Length& width, Length& height); + Length mmLength(double mm); + Length inchLength(double inch); +#if ENABLE(SVG) + void applySVGProperty(int id, CSSValue*); +#endif + + StyleImage* styleImage(CSSValue* value); + + // We collect the set of decls that match in |m_matchedDecls|. We then walk the + // set of matched decls four times, once for those properties that others depend on (like font-size), + // and then a second time for all the remaining properties. We then do the same two passes + // for any !important rules. + Vector m_matchedDecls; + + // A buffer used to hold the set of matched rules for an element, and a temporary buffer used for + // merge sorting. + Vector m_matchedRules; + + RefPtr m_ruleList; + + MediaQueryEvaluator* m_medium; + RefPtr m_rootDefaultStyle; + + PseudoId m_dynamicPseudo; + + SelectorChecker m_checker; + + RefPtr m_style; + RenderStyle* m_parentStyle; + RenderStyle* m_rootElementStyle; + Element* m_element; + StyledElement* m_styledElement; + EInsideLink m_elementLinkState; + Node* m_parentNode; + CSSValue* m_lineHeightValue; + bool m_fontDirty; + bool m_matchAuthorAndUserStyles; + + RefPtr m_fontSelector; + HashSet m_selectorAttrs; + Vector m_additionalAttributeStyleDecls; + Vector m_viewportDependentMediaQueryResults; + + HashMap m_variablesMap; + HashMap > m_resolvedVariablesDeclarations; + }; + + class CSSRuleData : public Noncopyable { + public: + CSSRuleData(unsigned pos, CSSStyleRule* r, CSSSelector* sel, CSSRuleData* prev = 0) + : m_position(pos) + , m_rule(r) + , m_selector(sel) + , m_next(0) + { + if (prev) + prev->m_next = this; + } + + ~CSSRuleData() + { + } + + unsigned position() { return m_position; } + CSSStyleRule* rule() { return m_rule; } + CSSSelector* selector() { return m_selector; } + CSSRuleData* next() { return m_next; } + + private: + unsigned m_position; + CSSStyleRule* m_rule; + CSSSelector* m_selector; + CSSRuleData* m_next; + }; + + class CSSRuleDataList : public Noncopyable { + public: + CSSRuleDataList(unsigned pos, CSSStyleRule* rule, CSSSelector* sel) + : m_first(new CSSRuleData(pos, rule, sel)) + , m_last(m_first) + { + } + + ~CSSRuleDataList() + { + CSSRuleData* ptr; + CSSRuleData* next; + ptr = m_first; + while (ptr) { + next = ptr->next(); + delete ptr; + ptr = next; + } + } + + CSSRuleData* first() { return m_first; } + CSSRuleData* last() { return m_last; } + + void append(unsigned pos, CSSStyleRule* rule, CSSSelector* sel) { m_last = new CSSRuleData(pos, rule, sel, m_last); } + + private: + CSSRuleData* m_first; + CSSRuleData* m_last; + }; + +} // namespace WebCore + +#endif // CSSStyleSelector_h