| /* |
| * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org) |
| * 1999 Waldo Bastian (bastian@kde.org) |
| * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010 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 CSSSelector_h |
| #define CSSSelector_h |
| |
| #include "QualifiedName.h" |
| #include "RenderStyleConstants.h" |
| #include <wtf/Noncopyable.h> |
| #include <wtf/OwnPtr.h> |
| #include <wtf/PassOwnPtr.h> |
| |
| namespace WebCore { |
| class CSSSelectorList; |
| |
| // this class represents a selector for a StyleRule |
| class CSSSelector { |
| WTF_MAKE_NONCOPYABLE(CSSSelector); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| CSSSelector() |
| : m_relation(Descendant) |
| , m_match(None) |
| , m_pseudoType(PseudoNotParsed) |
| , m_parsedNth(false) |
| , m_isLastInSelectorList(false) |
| , m_isLastInTagHistory(true) |
| , m_hasRareData(false) |
| , m_isForPage(false) |
| , m_deleted(false) |
| , m_tag(anyQName()) |
| { |
| } |
| |
| CSSSelector(const QualifiedName& qName) |
| : m_relation(Descendant) |
| , m_match(None) |
| , m_pseudoType(PseudoNotParsed) |
| , m_parsedNth(false) |
| , m_isLastInSelectorList(false) |
| , m_isLastInTagHistory(true) |
| , m_hasRareData(false) |
| , m_isForPage(false) |
| , m_deleted(false) |
| , m_tag(qName) |
| { |
| } |
| |
| ~CSSSelector() |
| { |
| if (m_deleted) |
| CRASH(); |
| m_deleted = true; |
| if (m_hasRareData) |
| delete m_data.m_rareData; |
| else if (m_data.m_value) |
| m_data.m_value->deref(); |
| } |
| |
| /** |
| * Re-create selector text from selector's data |
| */ |
| String selectorText() const; |
| |
| // checks if the 2 selectors (including sub selectors) agree. |
| bool operator==(const CSSSelector&); |
| |
| // tag == -1 means apply to all elements (Selector = *) |
| |
| unsigned specificity() const; |
| |
| /* how the attribute value has to match.... Default is Exact */ |
| enum Match { |
| None = 0, |
| 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 Relation { |
| Descendant = 0, |
| Child, |
| DirectAdjacent, |
| IndirectAdjacent, |
| SubSelector, |
| ShadowDescendant |
| }; |
| |
| enum PseudoType { |
| PseudoNotParsed = 0, |
| PseudoUnknown, |
| PseudoEmpty, |
| PseudoFirstChild, |
| PseudoFirstOfType, |
| PseudoLastChild, |
| PseudoLastOfType, |
| PseudoOnlyChild, |
| PseudoOnlyOfType, |
| PseudoFirstLine, |
| PseudoFirstLetter, |
| PseudoNthChild, |
| PseudoNthOfType, |
| PseudoNthLastChild, |
| PseudoNthLastOfType, |
| PseudoLink, |
| PseudoVisited, |
| PseudoAny, |
| PseudoAnyLink, |
| PseudoAutofill, |
| PseudoHover, |
| PseudoDrag, |
| PseudoFocus, |
| PseudoActive, |
| PseudoChecked, |
| PseudoEnabled, |
| PseudoFullPageMedia, |
| PseudoDefault, |
| PseudoDisabled, |
| PseudoInputPlaceholder, |
| PseudoOptional, |
| PseudoRequired, |
| PseudoReadOnly, |
| PseudoReadWrite, |
| PseudoValid, |
| PseudoInvalid, |
| PseudoIndeterminate, |
| PseudoTarget, |
| PseudoBefore, |
| PseudoAfter, |
| PseudoLang, |
| PseudoNot, |
| PseudoResizer, |
| PseudoRoot, |
| PseudoScrollbar, |
| PseudoScrollbarBack, |
| PseudoScrollbarButton, |
| PseudoScrollbarCorner, |
| PseudoScrollbarForward, |
| PseudoScrollbarThumb, |
| PseudoScrollbarTrack, |
| PseudoScrollbarTrackPiece, |
| PseudoWindowInactive, |
| PseudoCornerPresent, |
| PseudoDecrement, |
| PseudoIncrement, |
| PseudoHorizontal, |
| PseudoVertical, |
| PseudoStart, |
| PseudoEnd, |
| PseudoDoubleButton, |
| PseudoSingleButton, |
| PseudoNoButton, |
| PseudoSelection, |
| PseudoFileUploadButton, |
| PseudoSearchCancelButton, |
| PseudoSearchDecoration, |
| PseudoSearchResultsDecoration, |
| PseudoSearchResultsButton, |
| PseudoInputListButton, |
| #if ENABLE(INPUT_SPEECH) |
| PseudoInputSpeechButton, |
| #endif |
| PseudoInnerSpinButton, |
| PseudoOuterSpinButton, |
| PseudoLeftPage, |
| PseudoRightPage, |
| PseudoFirstPage, |
| #if ENABLE(FULLSCREEN_API) |
| PseudoFullScreen, |
| PseudoFullScreenDocument, |
| #endif |
| PseudoInRange, |
| PseudoOutOfRange, |
| }; |
| |
| enum MarginBoxType { |
| TopLeftCornerMarginBox, |
| TopLeftMarginBox, |
| TopCenterMarginBox, |
| TopRightMarginBox, |
| TopRightCornerMarginBox, |
| BottomLeftCornerMarginBox, |
| BottomLeftMarginBox, |
| BottomCenterMarginBox, |
| BottomRightMarginBox, |
| BottomRightCornerMarginBox, |
| LeftTopMarginBox, |
| LeftMiddleMarginBox, |
| LeftBottomMarginBox, |
| RightTopMarginBox, |
| RightMiddleMarginBox, |
| RightBottomMarginBox, |
| }; |
| |
| PseudoType pseudoType() const |
| { |
| if (m_pseudoType == PseudoNotParsed) |
| extractPseudoType(); |
| return static_cast<PseudoType>(m_pseudoType); |
| } |
| |
| static PseudoType parsePseudoType(const AtomicString&); |
| static PseudoId pseudoId(PseudoType); |
| |
| // Selectors are kept in an array by CSSSelectorList. The next component of the selector is |
| // the next item in the array. |
| CSSSelector* tagHistory() const { return m_isLastInTagHistory ? 0 : const_cast<CSSSelector*>(this + 1); } |
| |
| bool hasTag() const { return m_tag != anyQName(); } |
| bool hasAttribute() const { return m_match == Id || m_match == Class || (m_hasRareData && m_data.m_rareData->m_attribute != anyQName()); } |
| |
| const QualifiedName& tag() const { return m_tag; } |
| // AtomicString is really just an AtomicStringImpl* so the cast below is safe. |
| // FIXME: Perhaps call sites could be changed to accept AtomicStringImpl? |
| const AtomicString& value() const { return *reinterpret_cast<const AtomicString*>(m_hasRareData ? &m_data.m_rareData->m_value : &m_data.m_value); } |
| const QualifiedName& attribute() const; |
| const AtomicString& argument() const { return m_hasRareData ? m_data.m_rareData->m_argument : nullAtom; } |
| CSSSelectorList* selectorList() const { return m_hasRareData ? m_data.m_rareData->m_selectorList.get() : 0; } |
| |
| void setTag(const QualifiedName& value) { m_tag = value; } |
| void setValue(const AtomicString&); |
| void setAttribute(const QualifiedName&); |
| void setArgument(const AtomicString&); |
| void setSelectorList(PassOwnPtr<CSSSelectorList>); |
| |
| bool parseNth(); |
| bool matchNth(int count); |
| |
| bool matchesPseudoElement() const; |
| bool isUnknownPseudoElement() const; |
| bool isSiblingSelector() const; |
| |
| Relation relation() const { return static_cast<Relation>(m_relation); } |
| |
| bool isLastInSelectorList() const { return m_isLastInSelectorList; } |
| void setLastInSelectorList() { m_isLastInSelectorList = true; } |
| bool isLastInTagHistory() const { return m_isLastInTagHistory; } |
| void setNotLastInTagHistory() { m_isLastInTagHistory = false; } |
| |
| bool isSimple() const; |
| |
| bool isForPage() const { return m_isForPage; } |
| void setForPage() { m_isForPage = true; } |
| |
| unsigned m_relation : 3; // enum Relation |
| mutable unsigned m_match : 4; // enum Match |
| mutable unsigned m_pseudoType : 8; // PseudoType |
| |
| private: |
| bool m_parsedNth : 1; // Used for :nth-* |
| bool m_isLastInSelectorList : 1; |
| bool m_isLastInTagHistory : 1; |
| bool m_hasRareData : 1; |
| bool m_isForPage : 1; |
| // FIXME: Remove once http://webkit.org/b/56124 is fixed. |
| bool m_deleted : 1; |
| |
| unsigned specificityForOneSelector() const; |
| unsigned specificityForPage() const; |
| void extractPseudoType() const; |
| |
| struct RareData { |
| WTF_MAKE_NONCOPYABLE(RareData); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| RareData(PassRefPtr<AtomicStringImpl> value); |
| ~RareData(); |
| |
| bool parseNth(); |
| bool matchNth(int count); |
| |
| AtomicStringImpl* m_value; // Plain pointer to keep things uniform with the union. |
| int m_a; // Used for :nth-* |
| int m_b; // Used for :nth-* |
| QualifiedName m_attribute; // used for attribute selector |
| AtomicString m_argument; // Used for :contains, :lang and :nth-* |
| OwnPtr<CSSSelectorList> m_selectorList; // Used for :-webkit-any and :not |
| }; |
| void createRareData(); |
| |
| union DataUnion { |
| DataUnion() : m_value(0) { } |
| AtomicStringImpl* m_value; |
| RareData* m_rareData; |
| } m_data; |
| |
| QualifiedName m_tag; |
| }; |
| |
| inline bool CSSSelector::matchesPseudoElement() const |
| { |
| if (m_pseudoType == PseudoUnknown) |
| extractPseudoType(); |
| return m_match == PseudoElement; |
| } |
| |
| inline bool CSSSelector::isUnknownPseudoElement() const |
| { |
| return m_match == PseudoElement && m_pseudoType == PseudoUnknown; |
| } |
| |
| inline bool CSSSelector::isSiblingSelector() const |
| { |
| PseudoType type = pseudoType(); |
| return m_relation == DirectAdjacent |
| || m_relation == IndirectAdjacent |
| || type == PseudoEmpty |
| || type == PseudoFirstChild |
| || type == PseudoFirstOfType |
| || type == PseudoLastChild |
| || type == PseudoLastOfType |
| || type == PseudoOnlyChild |
| || type == PseudoOnlyOfType |
| || type == PseudoNthChild |
| || type == PseudoNthOfType |
| || type == PseudoNthLastChild |
| || type == PseudoNthLastOfType; |
| } |
| |
| inline void CSSSelector::setValue(const AtomicString& value) |
| { |
| // Need to do ref counting manually for the union. |
| if (m_hasRareData) { |
| m_data.m_rareData->m_value = value.impl(); |
| m_data.m_rareData->m_value->ref(); |
| return; |
| } |
| m_data.m_value = value.impl(); |
| m_data.m_value->ref(); |
| } |
| |
| inline void move(PassOwnPtr<CSSSelector> from, CSSSelector* to) |
| { |
| memcpy(to, from.get(), sizeof(CSSSelector)); |
| // We want to free the memory (which was allocated with fastNew), but we |
| // don't want the destructor to run since it will affect the copy we've just made. |
| fastDeleteSkippingDestructor(from.leakPtr()); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // CSSSelector_h |
