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https://gitlab.winehq.org/wine/wine-gecko.git
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28b56d8b93
Backed out changeset bf9f31312c1a (bug 1089417) Backed out changeset babf33f8e077 (bug 1089417) Backed out changeset 47b4f47d2e36 (bug 1089417) Backed out changeset 11da22489a4f (bug 1089417) Backed out changeset a39f32b2b2de (bug 1089417) Backed out changeset fba9c331e036 (bug 1089417) Backed out changeset b541a037f627 (bug 1089417) Backed out changeset fc47a51b4f96 (bug 1089417)
216 lines
7.3 KiB
C++
216 lines
7.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:tabstop=2:expandtab:shiftwidth=2:
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* style rule processor for CSS style sheets, responsible for selector
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* matching and cascading
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*/
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#ifndef nsCSSRuleProcessor_h_
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#define nsCSSRuleProcessor_h_
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#include "mozilla/Attributes.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/MemoryReporting.h"
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#include "nsIStyleRuleProcessor.h"
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#include "nsTArray.h"
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#include "nsAutoPtr.h"
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#include "nsRuleWalker.h"
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struct CascadeEnumData;
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struct nsCSSSelector;
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struct nsCSSSelectorList;
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struct RuleCascadeData;
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struct TreeMatchContext;
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class nsCSSKeyframesRule;
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class nsCSSPageRule;
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class nsCSSFontFeatureValuesRule;
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class nsCSSCounterStyleRule;
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namespace mozilla {
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class CSSStyleSheet;
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} // namespace mozilla
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/**
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* The CSS style rule processor provides a mechanism for sibling style
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* sheets to combine their rule processing in order to allow proper
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* cascading to happen.
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*
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* CSS style rule processors keep a live reference on all style sheets
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* bound to them. The CSS style sheets keep a weak reference to all the
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* processors that they are bound to (many to many). The CSS style sheet
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* is told when the rule processor is going away (via DropRuleProcessor).
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*/
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class nsCSSRuleProcessor: public nsIStyleRuleProcessor {
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public:
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typedef nsTArray<nsRefPtr<mozilla::CSSStyleSheet>> sheet_array_type;
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// aScopeElement must be non-null iff aSheetType is
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// nsStyleSet::eScopedDocSheet.
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nsCSSRuleProcessor(const sheet_array_type& aSheets,
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uint8_t aSheetType,
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mozilla::dom::Element* aScopeElement);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS(nsCSSRuleProcessor)
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public:
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nsresult ClearRuleCascades();
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static nsresult Startup();
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static void Shutdown();
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static void FreeSystemMetrics();
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static bool HasSystemMetric(nsIAtom* aMetric);
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/*
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* Returns true if the given aElement matches one of the
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* selectors in aSelectorList. Note that this method will assume
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* the given aElement is not a relevant link. aSelectorList must not
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* include any pseudo-element selectors. aSelectorList is allowed
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* to be null; in this case false will be returned.
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*/
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static bool SelectorListMatches(mozilla::dom::Element* aElement,
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TreeMatchContext& aTreeMatchContext,
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nsCSSSelectorList* aSelectorList);
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/*
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* Helper to get the content state for a content node. This may be
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* slightly adjusted from IntrinsicState().
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*/
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static mozilla::EventStates GetContentState(
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mozilla::dom::Element* aElement,
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const TreeMatchContext& aTreeMatchContext);
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/*
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* Helper to get the content state for :visited handling for an element
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*/
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static mozilla::EventStates GetContentStateForVisitedHandling(
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mozilla::dom::Element* aElement,
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const TreeMatchContext& aTreeMatchContext,
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nsRuleWalker::VisitedHandlingType aVisitedHandling,
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bool aIsRelevantLink);
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/*
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* Helper to test whether a node is a link
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*/
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static bool IsLink(mozilla::dom::Element* aElement);
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// nsIStyleRuleProcessor
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virtual void RulesMatching(ElementRuleProcessorData* aData) MOZ_OVERRIDE;
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virtual void RulesMatching(PseudoElementRuleProcessorData* aData) MOZ_OVERRIDE;
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virtual void RulesMatching(AnonBoxRuleProcessorData* aData) MOZ_OVERRIDE;
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#ifdef MOZ_XUL
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virtual void RulesMatching(XULTreeRuleProcessorData* aData) MOZ_OVERRIDE;
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#endif
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virtual nsRestyleHint HasStateDependentStyle(StateRuleProcessorData* aData) MOZ_OVERRIDE;
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virtual nsRestyleHint HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData) MOZ_OVERRIDE;
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virtual bool HasDocumentStateDependentStyle(StateRuleProcessorData* aData) MOZ_OVERRIDE;
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virtual nsRestyleHint
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HasAttributeDependentStyle(AttributeRuleProcessorData* aData) MOZ_OVERRIDE;
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virtual bool MediumFeaturesChanged(nsPresContext* aPresContext) MOZ_OVERRIDE;
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virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf)
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const MOZ_MUST_OVERRIDE MOZ_OVERRIDE;
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virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf)
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const MOZ_MUST_OVERRIDE MOZ_OVERRIDE;
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// Append all the currently-active font face rules to aArray. Return
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// true for success and false for failure.
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bool AppendFontFaceRules(nsPresContext* aPresContext,
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nsTArray<nsFontFaceRuleContainer>& aArray);
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nsCSSKeyframesRule* KeyframesRuleForName(nsPresContext* aPresContext,
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const nsString& aName);
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nsCSSCounterStyleRule* CounterStyleRuleForName(nsPresContext* aPresContext,
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const nsAString& aName);
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bool AppendPageRules(nsPresContext* aPresContext,
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nsTArray<nsCSSPageRule*>& aArray);
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bool AppendFontFeatureValuesRules(nsPresContext* aPresContext,
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nsTArray<nsCSSFontFeatureValuesRule*>& aArray);
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/**
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* Returns the scope element for the scoped style sheets this rule
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* processor is for. If this is not a rule processor for scoped style
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* sheets, it returns null.
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*/
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mozilla::dom::Element* GetScopeElement() const { return mScopeElement; }
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#ifdef DEBUG
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void AssertQuirksChangeOK() {
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NS_ASSERTION(!mRuleCascades, "can't toggle quirks style sheet without "
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"clearing rule cascades");
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}
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#endif
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#ifdef XP_WIN
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// Cached theme identifier for the moz-windows-theme media query.
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static uint8_t GetWindowsThemeIdentifier();
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static void SetWindowsThemeIdentifier(uint8_t aId) {
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sWinThemeId = aId;
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}
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#endif
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struct StateSelector {
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StateSelector(mozilla::EventStates aStates, nsCSSSelector* aSelector)
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: mStates(aStates),
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mSelector(aSelector)
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{}
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mozilla::EventStates mStates;
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nsCSSSelector* mSelector;
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};
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protected:
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virtual ~nsCSSRuleProcessor();
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private:
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static bool CascadeSheet(mozilla::CSSStyleSheet* aSheet,
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CascadeEnumData* aData);
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RuleCascadeData* GetRuleCascade(nsPresContext* aPresContext);
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void RefreshRuleCascade(nsPresContext* aPresContext);
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nsRestyleHint HasStateDependentStyle(ElementDependentRuleProcessorData* aData,
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mozilla::dom::Element* aStatefulElement,
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nsCSSPseudoElements::Type aPseudoType,
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mozilla::EventStates aStateMask);
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void ClearSheets();
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// The sheet order here is the same as in nsStyleSet::mSheets
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sheet_array_type mSheets;
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// active first, then cached (most recent first)
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RuleCascadeData* mRuleCascades;
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// The last pres context for which GetRuleCascades was called.
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nsPresContext *mLastPresContext;
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// The scope element for this rule processor's scoped style sheets.
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// Only used if mSheetType == nsStyleSet::eScopedDocSheet.
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nsRefPtr<mozilla::dom::Element> mScopeElement;
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// type of stylesheet using this processor
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uint8_t mSheetType; // == nsStyleSet::sheetType
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#ifdef XP_WIN
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static uint8_t sWinThemeId;
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#endif
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};
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#endif /* nsCSSRuleProcessor_h_ */
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