/* * 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 #include #include namespace WebCore { class CSSSelectorBag; // this class represents a selector for a StyleRule class CSSSelector : public Noncopyable { public: CSSSelector() : m_relation(Descendant) , m_match(None) , m_pseudoType(PseudoNotParsed) , m_parsedNth(false) , m_isLastInSelectorList(false) , m_hasRareData(false) , m_isForPage(false) , m_tag(anyQName()) { } CSSSelector(const QualifiedName& qName) : m_relation(Descendant) , m_match(None) , m_pseudoType(PseudoNotParsed) , m_parsedNth(false) , m_isLastInSelectorList(false) , m_hasRareData(false) , m_isForPage(false) , m_tag(qName) { } ~CSSSelector() { // Exit if this selector does not own any objects to be deleted. if (m_hasRareData) { if (!m_data.m_rareData) return; } else if (!m_data.m_tagHistory) return; // We can not delete the owned object(s) by simply calling delete // directly on them. That would lead to recursive destructor calls // which might cause stack overflow. We have to delete them // iteratively. deleteReachableSelectors(); } /** * 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, 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, PseudoMediaControlsPanel, PseudoMediaControlsMuteButton, PseudoMediaControlsPlayButton, PseudoMediaControlsTimelineContainer, PseudoMediaControlsVolumeSliderContainer, PseudoMediaControlsVolumeSliderMuteButton, PseudoMediaControlsCurrentTimeDisplay, PseudoMediaControlsTimeRemainingDisplay, PseudoMediaControlsToggleClosedCaptions, PseudoMediaControlsTimeline, PseudoMediaControlsVolumeSlider, PseudoMediaControlsSeekBackButton, PseudoMediaControlsSeekForwardButton, PseudoMediaControlsRewindButton, PseudoMediaControlsReturnToRealtimeButton, PseudoMediaControlsStatusDisplay, PseudoMediaControlsFullscreenButton, PseudoMeterHorizontalBar, PseudoMeterVerticalBar, PseudoMeterHorizontalOptimum, PseudoMeterHorizontalSuboptimal, PseudoMeterHorizontalEvenLessGood, PseudoMeterVerticalOptimum, PseudoMeterVerticalSuboptimal, PseudoMeterVerticalEvenLessGood, PseudoInputListButton, #if ENABLE(INPUT_SPEECH) PseudoInputSpeechButton, #endif PseudoInnerSpinButton, PseudoOuterSpinButton, PseudoProgressBarValue, 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(m_pseudoType); } static PseudoType parsePseudoType(const AtomicString&); static PseudoId pseudoId(PseudoType); CSSSelector* tagHistory() const { return m_hasRareData ? m_data.m_rareData->m_tagHistory.get() : m_data.m_tagHistory; } void setTagHistory(CSSSelector* tagHistory); 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& attribute() const; const AtomicString& argument() const { return m_hasRareData ? m_data.m_rareData->m_argument : nullAtom; } CSSSelector* simpleSelector() const { return m_hasRareData ? m_data.m_rareData->m_simpleSelector.get() : 0; } void setAttribute(const QualifiedName& value); void setArgument(const AtomicString& value); void setSimpleSelector(CSSSelector* value); bool parseNth(); bool matchNth(int count); bool matchesPseudoElement() const { if (m_pseudoType == PseudoUnknown) extractPseudoType(); return m_match == PseudoElement; } bool isUnknownPseudoElement() const; Relation relation() const { return static_cast(m_relation); } bool isLastInSelectorList() const { return m_isLastInSelectorList; } void setLastInSelectorList() { m_isLastInSelectorList = true; } 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_hasRareData : 1; bool m_isForPage : 1; void releaseOwnedSelectorsToBag(CSSSelectorBag&); void deleteReachableSelectors(); unsigned specificityForOneSelector() const; unsigned specificityForPage() const; void extractPseudoType() const; struct RareData : Noncopyable { RareData(PassOwnPtr tagHistory) : m_a(0) , m_b(0) , m_tagHistory(tagHistory) , m_attribute(anyQName()) , m_argument(nullAtom) { } bool parseNth(); bool matchNth(int count); int m_a; // Used for :nth-* int m_b; // Used for :nth-* OwnPtr m_tagHistory; OwnPtr m_simpleSelector; // Used for :not. QualifiedName m_attribute; // used for attribute selector AtomicString m_argument; // Used for :contains, :lang and :nth-* }; void createRareData() { if (m_hasRareData) return; m_data.m_rareData = new RareData(adoptPtr(m_data.m_tagHistory)); m_hasRareData = true; } union DataUnion { DataUnion() : m_tagHistory(0) { } CSSSelector* m_tagHistory; RareData* m_rareData; } m_data; public: mutable AtomicString m_value; QualifiedName m_tag; }; inline bool CSSSelector::isUnknownPseudoElement() const { return m_match == PseudoElement && m_pseudoType == PseudoUnknown; } } // namespace WebCore #endif // CSSSelector_h