| /* |
| * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org) |
| * 1999 Waldo Bastian (bastian@kde.org) |
| * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2013, 2014 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. |
| */ |
| |
| #pragma once |
| |
| #include "QualifiedName.h" |
| #include "RenderStyleConstants.h" |
| |
| namespace WebCore { |
| class CSSSelectorList; |
| |
| enum class SelectorSpecificityIncrement { |
| ClassA = 0x10000, |
| ClassB = 0x100, |
| ClassC = 1 |
| }; |
| |
| // this class represents a selector for a StyleRule |
| DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(CSSSelectorRareData); |
| class CSSSelector { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| CSSSelector(); |
| CSSSelector(const CSSSelector&); |
| explicit CSSSelector(const QualifiedName&, bool tagIsForNamespaceRule = false); |
| |
| ~CSSSelector(); |
| |
| /** |
| * Re-create selector text from selector's data |
| */ |
| String selectorText(const String& = emptyString()) const; |
| |
| // checks if the 2 selectors (including sub selectors) agree. |
| bool operator==(const CSSSelector&) const; |
| |
| static const unsigned maxValueMask = 0xffffff; |
| static const unsigned idMask = 0xff0000; |
| static const unsigned classMask = 0xff00; |
| static const unsigned elementMask = 0xff; |
| |
| unsigned computeSpecificity() const; |
| unsigned specificityForPage() const; |
| unsigned simpleSelectorSpecificity() const; |
| static unsigned addSpecificities(unsigned, unsigned); |
| |
| /* how the attribute value has to match.... Default is Exact */ |
| enum Match { |
| Unknown = 0, |
| Tag, |
| Id, |
| Class, |
| Exact, |
| Set, |
| List, |
| Hyphen, |
| PseudoClass, |
| PseudoElement, |
| Contain, // css3: E[foo*="bar"] |
| Begin, // css3: E[foo^="bar"] |
| End, // css3: E[foo$="bar"] |
| PagePseudoClass |
| }; |
| |
| enum RelationType { |
| Subselector, |
| DescendantSpace, |
| Child, |
| DirectAdjacent, |
| IndirectAdjacent, |
| ShadowDescendant, |
| ShadowPartDescendant, |
| ShadowSlotted |
| }; |
| |
| enum PseudoClassType { |
| PseudoClassUnknown = 0, |
| PseudoClassEmpty, |
| PseudoClassFirstChild, |
| PseudoClassFirstOfType, |
| PseudoClassLastChild, |
| PseudoClassLastOfType, |
| PseudoClassOnlyChild, |
| PseudoClassOnlyOfType, |
| PseudoClassNthChild, |
| PseudoClassNthOfType, |
| PseudoClassNthLastChild, |
| PseudoClassNthLastOfType, |
| PseudoClassLink, |
| PseudoClassVisited, |
| PseudoClassAny, |
| PseudoClassAnyLink, |
| PseudoClassAnyLinkDeprecated, |
| PseudoClassAutofill, |
| PseudoClassAutofillAndObscured, |
| PseudoClassAutofillStrongPassword, |
| PseudoClassAutofillStrongPasswordViewable, |
| PseudoClassHover, |
| PseudoClassDrag, |
| PseudoClassFocus, |
| PseudoClassFocusVisible, |
| PseudoClassFocusWithin, |
| PseudoClassActive, |
| PseudoClassChecked, |
| PseudoClassEnabled, |
| PseudoClassFullPageMedia, |
| PseudoClassDefault, |
| PseudoClassDisabled, |
| PseudoClassIs, |
| PseudoClassMatches, // obsolete synonym for PseudoClassIs |
| PseudoClassWhere, |
| PseudoClassOptional, |
| PseudoClassPlaceholderShown, |
| PseudoClassRequired, |
| PseudoClassReadOnly, |
| PseudoClassReadWrite, |
| PseudoClassValid, |
| PseudoClassInvalid, |
| PseudoClassIndeterminate, |
| PseudoClassTarget, |
| PseudoClassLang, |
| PseudoClassNot, |
| PseudoClassRoot, |
| PseudoClassScope, |
| PseudoClassRelativeScope, // Like :scope but for internal use with relative selectors like :has(> foo). |
| PseudoClassWindowInactive, |
| PseudoClassCornerPresent, |
| PseudoClassDecrement, |
| PseudoClassIncrement, |
| PseudoClassHas, |
| PseudoClassHorizontal, |
| PseudoClassVertical, |
| PseudoClassStart, |
| PseudoClassEnd, |
| PseudoClassDoubleButton, |
| PseudoClassSingleButton, |
| PseudoClassNoButton, |
| #if ENABLE(FULLSCREEN_API) |
| PseudoClassFullScreen, |
| PseudoClassFullScreenDocument, |
| PseudoClassFullScreenAncestor, |
| PseudoClassAnimatingFullScreenTransition, |
| PseudoClassFullScreenControlsHidden, |
| #endif |
| #if ENABLE(PICTURE_IN_PICTURE_API) |
| PseudoClassPictureInPicture, |
| #endif |
| PseudoClassInRange, |
| PseudoClassOutOfRange, |
| #if ENABLE(VIDEO) |
| PseudoClassFuture, |
| PseudoClassPast, |
| PseudoClassPlaying, |
| PseudoClassPaused, |
| PseudoClassSeeking, |
| PseudoClassBuffering, |
| PseudoClassStalled, |
| PseudoClassMuted, |
| PseudoClassVolumeLocked, |
| #endif |
| #if ENABLE(CSS_SELECTORS_LEVEL4) |
| PseudoClassDir, |
| PseudoClassRole, |
| #endif |
| PseudoClassHost, |
| PseudoClassDefined, |
| #if ENABLE(ATTACHMENT_ELEMENT) |
| PseudoClassHasAttachment, |
| #endif |
| PseudoClassModalDialog, |
| }; |
| |
| enum PseudoElementType { |
| PseudoElementUnknown = 0, |
| PseudoElementAfter, |
| PseudoElementBackdrop, |
| PseudoElementBefore, |
| #if ENABLE(VIDEO) |
| PseudoElementCue, |
| #endif |
| PseudoElementFirstLetter, |
| PseudoElementFirstLine, |
| PseudoElementHighlight, |
| PseudoElementMarker, |
| PseudoElementPart, |
| PseudoElementResizer, |
| PseudoElementScrollbar, |
| PseudoElementScrollbarButton, |
| PseudoElementScrollbarCorner, |
| PseudoElementScrollbarThumb, |
| PseudoElementScrollbarTrack, |
| PseudoElementScrollbarTrackPiece, |
| PseudoElementSelection, |
| PseudoElementSlotted, |
| PseudoElementWebKitCustom, |
| |
| // WebKitCustom that appeared in an old prefixed form |
| // and need special handling. |
| PseudoElementWebKitCustomLegacyPrefixed, |
| }; |
| |
| enum PagePseudoClassType { |
| PagePseudoClassFirst = 1, |
| PagePseudoClassLeft, |
| PagePseudoClassRight, |
| }; |
| |
| enum MarginBoxType { |
| TopLeftCornerMarginBox, |
| TopLeftMarginBox, |
| TopCenterMarginBox, |
| TopRightMarginBox, |
| TopRightCornerMarginBox, |
| BottomLeftCornerMarginBox, |
| BottomLeftMarginBox, |
| BottomCenterMarginBox, |
| BottomRightMarginBox, |
| BottomRightCornerMarginBox, |
| LeftTopMarginBox, |
| LeftMiddleMarginBox, |
| LeftBottomMarginBox, |
| RightTopMarginBox, |
| RightMiddleMarginBox, |
| RightBottomMarginBox, |
| }; |
| |
| enum AttributeMatchType { |
| CaseSensitive, |
| CaseInsensitive, |
| }; |
| |
| static PseudoElementType parsePseudoElementType(StringView); |
| static PseudoId pseudoId(PseudoElementType); |
| |
| // Selectors are kept in an array by CSSSelectorList. The next component of the selector is |
| // the next item in the array. |
| const CSSSelector* tagHistory() const { return m_isLastInTagHistory ? nullptr : this + 1; } |
| const CSSSelector* firstInCompound() const; |
| |
| const QualifiedName& tagQName() const; |
| const AtomString& tagLowercaseLocalName() const; |
| |
| const AtomString& value() const; |
| const AtomString& serializingValue() const; |
| const QualifiedName& attribute() const; |
| const AtomString& attributeCanonicalLocalName() const; |
| const AtomString& argument() const { return m_hasRareData ? m_data.m_rareData->m_argument : nullAtom(); } |
| bool attributeValueMatchingIsCaseInsensitive() const; |
| const Vector<AtomString>* argumentList() const { return m_hasRareData ? m_data.m_rareData->m_argumentList.get() : nullptr; } |
| const CSSSelectorList* selectorList() const { return m_hasRareData ? m_data.m_rareData->m_selectorList.get() : nullptr; } |
| |
| void setValue(const AtomString&, bool matchLowerCase = false); |
| |
| void setAttribute(const QualifiedName&, bool convertToLowercase, AttributeMatchType); |
| void setNth(int a, int b); |
| void setArgument(const AtomString&); |
| void setArgumentList(std::unique_ptr<Vector<AtomString>>); |
| void setSelectorList(std::unique_ptr<CSSSelectorList>); |
| |
| bool matchNth(int count) const; |
| int nthA() const; |
| int nthB() const; |
| |
| bool hasDescendantRelation() const { return relation() == DescendantSpace; } |
| |
| bool hasDescendantOrChildRelation() const { return relation() == Child || hasDescendantRelation(); } |
| |
| PseudoClassType pseudoClassType() const |
| { |
| ASSERT(match() == PseudoClass); |
| return static_cast<PseudoClassType>(m_pseudoType); |
| } |
| void setPseudoClassType(PseudoClassType pseudoType) |
| { |
| m_pseudoType = pseudoType; |
| ASSERT(m_pseudoType == pseudoType); |
| } |
| |
| PseudoElementType pseudoElementType() const |
| { |
| ASSERT(match() == PseudoElement); |
| return static_cast<PseudoElementType>(m_pseudoType); |
| } |
| void setPseudoElementType(PseudoElementType pseudoElementType) |
| { |
| m_pseudoType = pseudoElementType; |
| ASSERT(m_pseudoType == pseudoElementType); |
| } |
| |
| PagePseudoClassType pagePseudoClassType() const |
| { |
| ASSERT(match() == PagePseudoClass); |
| return static_cast<PagePseudoClassType>(m_pseudoType); |
| } |
| void setPagePseudoType(PagePseudoClassType pagePseudoType) |
| { |
| m_pseudoType = pagePseudoType; |
| ASSERT(m_pseudoType == pagePseudoType); |
| } |
| |
| bool matchesPseudoElement() const; |
| bool isUnknownPseudoElement() const; |
| bool isCustomPseudoElement() const; |
| bool isWebKitCustomPseudoElement() const; |
| bool isSiblingSelector() const; |
| bool isAttributeSelector() const; |
| |
| RelationType relation() const { return static_cast<RelationType>(m_relation); } |
| void setRelation(RelationType relation) |
| { |
| m_relation = relation; |
| ASSERT(m_relation == relation); |
| } |
| |
| Match match() const { return static_cast<Match>(m_match); } |
| void setMatch(Match match) |
| { |
| m_match = match; |
| ASSERT(m_match == match); |
| } |
| |
| bool isLastInSelectorList() const { return m_isLastInSelectorList; } |
| void setLastInSelectorList() { m_isLastInSelectorList = true; } |
| bool isFirstInTagHistory() const { return m_isFirstInTagHistory; } |
| bool isLastInTagHistory() const { return m_isLastInTagHistory; } |
| void setNotFirstInTagHistory() { m_isFirstInTagHistory = false; } |
| void setNotLastInTagHistory() { m_isLastInTagHistory = false; } |
| |
| bool isForPage() const { return m_isForPage; } |
| void setForPage() { m_isForPage = true; } |
| |
| private: |
| unsigned m_relation : 4; // enum RelationType. |
| mutable unsigned m_match : 4; // enum Match. |
| mutable unsigned m_pseudoType : 8; // PseudoType. |
| unsigned m_isLastInSelectorList : 1; |
| unsigned m_isFirstInTagHistory : 1; |
| unsigned m_isLastInTagHistory : 1; |
| unsigned m_hasRareData : 1; |
| unsigned m_hasNameWithCase : 1; |
| unsigned m_isForPage : 1; |
| unsigned m_tagIsForNamespaceRule : 1; |
| unsigned m_caseInsensitiveAttributeValueMatching : 1; |
| #if !ASSERT_WITH_SECURITY_IMPLICATION_DISABLED |
| unsigned m_destructorHasBeenCalled : 1; |
| #endif |
| |
| unsigned simpleSelectorSpecificityForPage() const; |
| |
| // Hide. |
| CSSSelector& operator=(const CSSSelector&); |
| |
| struct RareData : public RefCounted<RareData> { |
| WTF_MAKE_STRUCT_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(CSSSelectorRareData); |
| static Ref<RareData> create(AtomString&& value) { return adoptRef(*new RareData(WTFMove(value))); } |
| ~RareData(); |
| |
| bool matchNth(int count); |
| |
| // For quirks mode, class and id are case-insensitive. In the case where uppercase |
| // letters are used in quirks mode, |m_matchingValue| holds the lowercase class/id |
| // and |m_serializingValue| holds the original string. |
| AtomString m_matchingValue; |
| AtomString m_serializingValue; |
| |
| int m_a; // Used for :nth-* |
| int m_b; // Used for :nth-* |
| QualifiedName m_attribute; // used for attribute selector |
| AtomString m_attributeCanonicalLocalName; |
| AtomString m_argument; // Used for :contains and :nth-* |
| std::unique_ptr<Vector<AtomString>> m_argumentList; // Used for :lang and ::part arguments. |
| std::unique_ptr<CSSSelectorList> m_selectorList; // Used for :is(), :matches(), and :not(). |
| |
| private: |
| RareData(AtomString&& value); |
| }; |
| void createRareData(); |
| |
| struct NameWithCase : public RefCounted<NameWithCase> { |
| NameWithCase(const QualifiedName& originalName, const AtomString& lowercaseName) |
| : m_originalName(originalName) |
| , m_lowercaseLocalName(lowercaseName) |
| { |
| ASSERT(originalName.localName() != lowercaseName); |
| } |
| |
| const QualifiedName m_originalName; |
| const AtomString m_lowercaseLocalName; |
| }; |
| |
| union DataUnion { |
| DataUnion() : m_value(0) { } |
| AtomStringImpl* m_value; |
| QualifiedName::QualifiedNameImpl* m_tagQName; |
| RareData* m_rareData; |
| NameWithCase* m_nameWithCase; |
| } m_data; |
| }; |
| |
| inline const QualifiedName& CSSSelector::attribute() const |
| { |
| ASSERT(isAttributeSelector()); |
| ASSERT(m_hasRareData); |
| return m_data.m_rareData->m_attribute; |
| } |
| |
| inline const AtomString& CSSSelector::attributeCanonicalLocalName() const |
| { |
| ASSERT(isAttributeSelector()); |
| ASSERT(m_hasRareData); |
| return m_data.m_rareData->m_attributeCanonicalLocalName; |
| } |
| |
| inline bool CSSSelector::matchesPseudoElement() const |
| { |
| return match() == PseudoElement; |
| } |
| |
| inline bool CSSSelector::isUnknownPseudoElement() const |
| { |
| return match() == PseudoElement && pseudoElementType() == PseudoElementUnknown; |
| } |
| |
| inline bool CSSSelector::isCustomPseudoElement() const |
| { |
| return match() == PseudoElement |
| && (pseudoElementType() == PseudoElementWebKitCustom |
| || pseudoElementType() == PseudoElementWebKitCustomLegacyPrefixed); |
| } |
| |
| inline bool CSSSelector::isWebKitCustomPseudoElement() const |
| { |
| return pseudoElementType() == PseudoElementWebKitCustom || pseudoElementType() == PseudoElementWebKitCustomLegacyPrefixed; |
| } |
| |
| static inline bool pseudoClassIsRelativeToSiblings(CSSSelector::PseudoClassType type) |
| { |
| return type == CSSSelector::PseudoClassEmpty |
| || type == CSSSelector::PseudoClassFirstChild |
| || type == CSSSelector::PseudoClassFirstOfType |
| || type == CSSSelector::PseudoClassLastChild |
| || type == CSSSelector::PseudoClassLastOfType |
| || type == CSSSelector::PseudoClassOnlyChild |
| || type == CSSSelector::PseudoClassOnlyOfType |
| || type == CSSSelector::PseudoClassNthChild |
| || type == CSSSelector::PseudoClassNthOfType |
| || type == CSSSelector::PseudoClassNthLastChild |
| || type == CSSSelector::PseudoClassNthLastOfType; |
| } |
| |
| static inline bool isTreeStructuralPseudoClass(CSSSelector::PseudoClassType type) |
| { |
| return pseudoClassIsRelativeToSiblings(type) || type == CSSSelector::PseudoClassRoot; |
| } |
| |
| inline bool isLogicalCombinationPseudoClass(CSSSelector::PseudoClassType pseudoClassType) |
| { |
| switch (pseudoClassType) { |
| case CSSSelector::PseudoClassIs: |
| case CSSSelector::PseudoClassWhere: |
| case CSSSelector::PseudoClassNot: |
| case CSSSelector::PseudoClassAny: |
| case CSSSelector::PseudoClassMatches: |
| case CSSSelector::PseudoClassHas: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| inline bool CSSSelector::isSiblingSelector() const |
| { |
| return relation() == DirectAdjacent |
| || relation() == IndirectAdjacent |
| || (match() == CSSSelector::PseudoClass && pseudoClassIsRelativeToSiblings(pseudoClassType())); |
| } |
| |
| inline bool CSSSelector::isAttributeSelector() const |
| { |
| return match() == CSSSelector::Exact |
| || match() == CSSSelector::Set |
| || match() == CSSSelector::List |
| || match() == CSSSelector::Hyphen |
| || match() == CSSSelector::Contain |
| || match() == CSSSelector::Begin |
| || match() == CSSSelector::End; |
| } |
| |
| inline void CSSSelector::setValue(const AtomString& value, bool matchLowerCase) |
| { |
| ASSERT(match() != Tag); |
| AtomString matchingValue = matchLowerCase ? value.convertToASCIILowercase() : value; |
| if (!m_hasRareData && matchingValue != value) |
| createRareData(); |
| |
| // Need to do ref counting manually for the union. |
| if (!m_hasRareData) { |
| if (m_data.m_value) |
| m_data.m_value->deref(); |
| m_data.m_value = value.impl(); |
| m_data.m_value->ref(); |
| return; |
| } |
| |
| m_data.m_rareData->m_matchingValue = WTFMove(matchingValue); |
| m_data.m_rareData->m_serializingValue = value; |
| } |
| |
| inline CSSSelector::CSSSelector() |
| : m_relation(DescendantSpace) |
| , m_match(Unknown) |
| , m_pseudoType(0) |
| , m_isLastInSelectorList(false) |
| , m_isFirstInTagHistory(true) |
| , m_isLastInTagHistory(true) |
| , m_hasRareData(false) |
| , m_hasNameWithCase(false) |
| , m_isForPage(false) |
| , m_tagIsForNamespaceRule(false) |
| , m_caseInsensitiveAttributeValueMatching(false) |
| #if !ASSERT_WITH_SECURITY_IMPLICATION_DISABLED |
| , m_destructorHasBeenCalled(false) |
| #endif |
| { |
| } |
| |
| inline CSSSelector::CSSSelector(const CSSSelector& o) |
| : m_relation(o.m_relation) |
| , m_match(o.m_match) |
| , m_pseudoType(o.m_pseudoType) |
| , m_isLastInSelectorList(o.m_isLastInSelectorList) |
| , m_isFirstInTagHistory(o.m_isFirstInTagHistory) |
| , m_isLastInTagHistory(o.m_isLastInTagHistory) |
| , m_hasRareData(o.m_hasRareData) |
| , m_hasNameWithCase(o.m_hasNameWithCase) |
| , m_isForPage(o.m_isForPage) |
| , m_tagIsForNamespaceRule(o.m_tagIsForNamespaceRule) |
| , m_caseInsensitiveAttributeValueMatching(o.m_caseInsensitiveAttributeValueMatching) |
| #if !ASSERT_WITH_SECURITY_IMPLICATION_DISABLED |
| , m_destructorHasBeenCalled(false) |
| #endif |
| { |
| if (o.m_hasRareData) { |
| m_data.m_rareData = o.m_data.m_rareData; |
| m_data.m_rareData->ref(); |
| } else if (o.m_hasNameWithCase) { |
| m_data.m_nameWithCase = o.m_data.m_nameWithCase; |
| m_data.m_nameWithCase->ref(); |
| } if (o.match() == Tag) { |
| m_data.m_tagQName = o.m_data.m_tagQName; |
| m_data.m_tagQName->ref(); |
| } else if (o.m_data.m_value) { |
| m_data.m_value = o.m_data.m_value; |
| m_data.m_value->ref(); |
| } |
| } |
| |
| inline CSSSelector::~CSSSelector() |
| { |
| ASSERT_WITH_SECURITY_IMPLICATION(!m_destructorHasBeenCalled); |
| #if !ASSERT_WITH_SECURITY_IMPLICATION_DISABLED |
| m_destructorHasBeenCalled = true; |
| #endif |
| if (m_hasRareData) { |
| m_data.m_rareData->deref(); |
| m_data.m_rareData = nullptr; |
| m_hasRareData = false; |
| } else if (m_hasNameWithCase) { |
| m_data.m_nameWithCase->deref(); |
| m_data.m_nameWithCase = nullptr; |
| m_hasNameWithCase = false; |
| } else if (match() == Tag) { |
| m_data.m_tagQName->deref(); |
| m_data.m_tagQName = nullptr; |
| m_match = Unknown; |
| } else if (m_data.m_value) { |
| m_data.m_value->deref(); |
| m_data.m_value = nullptr; |
| } |
| } |
| |
| inline const QualifiedName& CSSSelector::tagQName() const |
| { |
| ASSERT(match() == Tag); |
| if (m_hasNameWithCase) |
| return m_data.m_nameWithCase->m_originalName; |
| return *reinterpret_cast<const QualifiedName*>(&m_data.m_tagQName); |
| } |
| |
| inline const AtomString& CSSSelector::tagLowercaseLocalName() const |
| { |
| if (m_hasNameWithCase) |
| return m_data.m_nameWithCase->m_lowercaseLocalName; |
| return m_data.m_tagQName->m_localName; |
| } |
| |
| inline const AtomString& CSSSelector::value() const |
| { |
| ASSERT(match() != Tag); |
| if (m_hasRareData) |
| return m_data.m_rareData->m_matchingValue; |
| |
| // AtomString is really just an AtomStringImpl* so the cast below is safe. |
| return *reinterpret_cast<const AtomString*>(&m_data.m_value); |
| } |
| |
| inline const AtomString& CSSSelector::serializingValue() const |
| { |
| ASSERT(match() != Tag); |
| if (m_hasRareData) |
| return m_data.m_rareData->m_serializingValue; |
| |
| // AtomString is really just an AtomStringImpl* so the cast below is safe. |
| return *reinterpret_cast<const AtomString*>(&m_data.m_value); |
| } |
| |
| inline bool CSSSelector::attributeValueMatchingIsCaseInsensitive() const |
| { |
| return m_caseInsensitiveAttributeValueMatching; |
| } |
| |
| } // namespace WebCore |
