forked from mirrors/gecko-dev
de377508c9
MozReview-Commit-ID: LYn6duc0Zwh --HG-- extra : rebase_source : d05df8d736547426c8719d114782556571b6479b
279 lines
10 KiB
C++
279 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/*
|
|
* style rule processor for CSS style sheets, responsible for selector
|
|
* matching and cascading
|
|
*/
|
|
|
|
#ifndef nsCSSRuleProcessor_h_
|
|
#define nsCSSRuleProcessor_h_
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/EventStates.h"
|
|
#include "mozilla/MemoryReporting.h"
|
|
#include "mozilla/RefCountType.h"
|
|
#include "mozilla/SheetType.h"
|
|
#include "mozilla/UniquePtr.h"
|
|
#include "nsExpirationTracker.h"
|
|
#include "nsMediaList.h"
|
|
#include "nsIStyleRuleProcessor.h"
|
|
#include "nsRuleWalker.h"
|
|
#include "nsTArray.h"
|
|
|
|
struct CascadeEnumData;
|
|
struct ElementDependentRuleProcessorData;
|
|
struct nsCSSSelector;
|
|
struct nsCSSSelectorList;
|
|
struct nsFontFaceRuleContainer;
|
|
struct RuleCascadeData;
|
|
struct TreeMatchContext;
|
|
class nsCSSKeyframesRule;
|
|
class nsCSSPageRule;
|
|
class nsCSSFontFeatureValuesRule;
|
|
class nsCSSCounterStyleRule;
|
|
|
|
namespace mozilla {
|
|
class CSSStyleSheet;
|
|
enum class CSSPseudoElementType : uint8_t;
|
|
enum class CSSPseudoClassType : uint8_t;
|
|
namespace css {
|
|
class DocumentRule;
|
|
} // namespace css
|
|
} // namespace mozilla
|
|
|
|
/**
|
|
* The CSS style rule processor provides a mechanism for sibling style
|
|
* sheets to combine their rule processing in order to allow proper
|
|
* cascading to happen.
|
|
*
|
|
* CSS style rule processors keep a live reference on all style sheets
|
|
* bound to them. The CSS style sheets keep a weak reference to all the
|
|
* processors that they are bound to (many to many). The CSS style sheet
|
|
* is told when the rule processor is going away (via DropRuleProcessor).
|
|
*/
|
|
|
|
class nsCSSRuleProcessor: public nsIStyleRuleProcessor {
|
|
public:
|
|
typedef nsTArray<RefPtr<mozilla::CSSStyleSheet>> sheet_array_type;
|
|
|
|
// aScopeElement must be non-null iff aSheetType is
|
|
// SheetType::ScopedDoc.
|
|
// aPreviousCSSRuleProcessor is the rule processor (if any) that this
|
|
// one is replacing.
|
|
nsCSSRuleProcessor(const sheet_array_type& aSheets,
|
|
mozilla::SheetType aSheetType,
|
|
mozilla::dom::Element* aScopeElement,
|
|
nsCSSRuleProcessor* aPreviousCSSRuleProcessor,
|
|
bool aIsShared = false);
|
|
nsCSSRuleProcessor(sheet_array_type&& aSheets,
|
|
mozilla::SheetType aSheetType,
|
|
mozilla::dom::Element* aScopeElement,
|
|
nsCSSRuleProcessor* aPreviousCSSRuleProcessor,
|
|
bool aIsShared = false);
|
|
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_CLASS(nsCSSRuleProcessor)
|
|
|
|
public:
|
|
nsresult ClearRuleCascades();
|
|
|
|
/*
|
|
* Returns true if the given aElement matches one of the
|
|
* selectors in aSelectorList. Note that this method will assume
|
|
* the given aElement is not a relevant link. aSelectorList must not
|
|
* include any pseudo-element selectors. aSelectorList is allowed
|
|
* to be null; in this case false will be returned.
|
|
*/
|
|
static bool SelectorListMatches(mozilla::dom::Element* aElement,
|
|
TreeMatchContext& aTreeMatchContext,
|
|
nsCSSSelectorList* aSelectorList);
|
|
|
|
/*
|
|
* Helper to get the content state for a content node. This may be
|
|
* slightly adjusted from IntrinsicState().
|
|
*/
|
|
static mozilla::EventStates GetContentState(
|
|
const mozilla::dom::Element* aElement,
|
|
bool aUsingPrivateBrowsing);
|
|
static mozilla::EventStates GetContentState(
|
|
const mozilla::dom::Element* aElement,
|
|
const TreeMatchContext& aTreeMatchContext);
|
|
static mozilla::EventStates GetContentState(
|
|
const mozilla::dom::Element* aElement);
|
|
|
|
/*
|
|
* Helper to get the content state for :visited handling for an element
|
|
*/
|
|
static mozilla::EventStates GetContentStateForVisitedHandling(
|
|
const mozilla::dom::Element* aElement,
|
|
nsRuleWalker::VisitedHandlingType aVisitedHandling,
|
|
bool aIsRelevantLink);
|
|
|
|
/*
|
|
* Helper to test whether a node is a link
|
|
*/
|
|
static bool IsLink(const mozilla::dom::Element* aElement);
|
|
|
|
/**
|
|
* Returns true if the given aElement matches aSelector.
|
|
* Like nsCSSRuleProcessor.cpp's SelectorMatches (and unlike
|
|
* SelectorMatchesTree), this does not check an entire selector list
|
|
* separated by combinators.
|
|
*
|
|
* :visited and :link will match both visited and non-visited links,
|
|
* as if aTreeMatchContext->mVisitedHandling were eLinksVisitedOrUnvisited.
|
|
*
|
|
* aSelector is restricted to not containing pseudo-elements.
|
|
*/
|
|
static bool RestrictedSelectorMatches(mozilla::dom::Element* aElement,
|
|
nsCSSSelector* aSelector,
|
|
TreeMatchContext& aTreeMatchContext);
|
|
// nsIStyleRuleProcessor
|
|
virtual void RulesMatching(ElementRuleProcessorData* aData) override;
|
|
|
|
virtual void RulesMatching(PseudoElementRuleProcessorData* aData) override;
|
|
|
|
virtual void RulesMatching(AnonBoxRuleProcessorData* aData) override;
|
|
|
|
#ifdef MOZ_XUL
|
|
virtual void RulesMatching(XULTreeRuleProcessorData* aData) override;
|
|
#endif
|
|
|
|
virtual nsRestyleHint HasStateDependentStyle(StateRuleProcessorData* aData) override;
|
|
virtual nsRestyleHint HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData) override;
|
|
|
|
virtual bool HasDocumentStateDependentStyle(StateRuleProcessorData* aData) override;
|
|
|
|
virtual nsRestyleHint
|
|
HasAttributeDependentStyle(AttributeRuleProcessorData* aData,
|
|
mozilla::RestyleHintData& aRestyleHintDataResult)
|
|
override;
|
|
|
|
virtual bool MediumFeaturesChanged(nsPresContext* aPresContext) override;
|
|
|
|
/**
|
|
* If this rule processor currently has a substantive media query
|
|
* result cache key, return a copy of it.
|
|
*/
|
|
mozilla::UniquePtr<nsMediaQueryResultCacheKey> CloneMQCacheKey();
|
|
|
|
virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf)
|
|
const MOZ_MUST_OVERRIDE override;
|
|
virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf)
|
|
const MOZ_MUST_OVERRIDE override;
|
|
|
|
// Append all the currently-active font face rules to aArray. Return
|
|
// true for success and false for failure.
|
|
bool AppendFontFaceRules(nsPresContext* aPresContext,
|
|
nsTArray<nsFontFaceRuleContainer>& aArray);
|
|
|
|
nsCSSKeyframesRule* KeyframesRuleForName(nsPresContext* aPresContext,
|
|
const nsAtom* aName);
|
|
|
|
nsCSSCounterStyleRule* CounterStyleRuleForName(nsPresContext* aPresContext,
|
|
nsAtom* aName);
|
|
|
|
bool AppendPageRules(nsPresContext* aPresContext,
|
|
nsTArray<nsCSSPageRule*>& aArray);
|
|
|
|
bool AppendFontFeatureValuesRules(nsPresContext* aPresContext,
|
|
nsTArray<nsCSSFontFeatureValuesRule*>& aArray);
|
|
|
|
/**
|
|
* Returns the scope element for the scoped style sheets this rule
|
|
* processor is for. If this is not a rule processor for scoped style
|
|
* sheets, it returns null.
|
|
*/
|
|
mozilla::dom::Element* GetScopeElement() const { return mScopeElement; }
|
|
|
|
void TakeDocumentRulesAndCacheKey(
|
|
nsPresContext* aPresContext,
|
|
nsTArray<mozilla::css::DocumentRule*>& aDocumentRules,
|
|
nsDocumentRuleResultCacheKey& aDocumentRuleResultCacheKey);
|
|
|
|
bool IsShared() const { return mIsShared; }
|
|
|
|
nsExpirationState* GetExpirationState() { return &mExpirationState; }
|
|
void AddStyleSetRef();
|
|
void ReleaseStyleSetRef();
|
|
void SetInRuleProcessorCache(bool aVal) {
|
|
MOZ_ASSERT(mIsShared);
|
|
mInRuleProcessorCache = aVal;
|
|
}
|
|
bool IsInRuleProcessorCache() const { return mInRuleProcessorCache; }
|
|
bool IsUsedByMultipleStyleSets() const { return mStyleSetRefCnt > 1; }
|
|
|
|
struct StateSelector {
|
|
StateSelector(mozilla::EventStates aStates, nsCSSSelector* aSelector)
|
|
: mStates(aStates),
|
|
mSelector(aSelector)
|
|
{}
|
|
|
|
mozilla::EventStates mStates;
|
|
nsCSSSelector* mSelector;
|
|
};
|
|
|
|
protected:
|
|
virtual ~nsCSSRuleProcessor();
|
|
|
|
private:
|
|
static bool CascadeSheet(mozilla::CSSStyleSheet* aSheet,
|
|
CascadeEnumData* aData);
|
|
|
|
RuleCascadeData* GetRuleCascade(nsPresContext* aPresContext);
|
|
void RefreshRuleCascade(nsPresContext* aPresContext);
|
|
|
|
nsRestyleHint HasStateDependentStyle(ElementDependentRuleProcessorData* aData,
|
|
mozilla::dom::Element* aStatefulElement,
|
|
mozilla::CSSPseudoElementType aPseudoType,
|
|
mozilla::EventStates aStateMask);
|
|
|
|
void ClearSheets();
|
|
|
|
// The sheet order here is the same as in nsStyleSet::mSheets
|
|
sheet_array_type mSheets;
|
|
|
|
// active first, then cached (most recent first)
|
|
RuleCascadeData* mRuleCascades;
|
|
|
|
// If we cleared our mRuleCascades or replaced a previous rule
|
|
// processor, this is the media query result cache key that was used
|
|
// before we lost the old rule cascades.
|
|
mozilla::UniquePtr<nsMediaQueryResultCacheKey> mPreviousCacheKey;
|
|
|
|
// The last pres context for which GetRuleCascades was called.
|
|
nsPresContext *mLastPresContext;
|
|
|
|
// The scope element for this rule processor's scoped style sheets.
|
|
// Only used if mSheetType == nsStyleSet::eScopedDocSheet.
|
|
RefPtr<mozilla::dom::Element> mScopeElement;
|
|
|
|
nsTArray<mozilla::css::DocumentRule*> mDocumentRules;
|
|
nsDocumentRuleResultCacheKey mDocumentCacheKey;
|
|
|
|
nsExpirationState mExpirationState;
|
|
MozRefCountType mStyleSetRefCnt;
|
|
|
|
// type of stylesheet using this processor
|
|
mozilla::SheetType mSheetType;
|
|
|
|
const bool mIsShared;
|
|
|
|
// Whether we need to build up mDocumentCacheKey and mDocumentRules as
|
|
// we build a RuleCascadeData. Is true only for shared rule processors
|
|
// and only before we build the first RuleCascadeData. See comment in
|
|
// RefreshRuleCascade for why.
|
|
bool mMustGatherDocumentRules;
|
|
|
|
bool mInRuleProcessorCache;
|
|
|
|
#ifdef DEBUG
|
|
bool mDocumentRulesAndCacheKeyValid;
|
|
#endif
|
|
};
|
|
|
|
#endif /* nsCSSRuleProcessor_h_ */
|