gecko-dev/layout/style/CSSStyleSheet.h

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6.4 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:tabstop=2:expandtab:shiftwidth=2:
/* 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/. */
/* representation of a CSS style sheet */
#ifndef mozilla_CSSStyleSheet_h
#define mozilla_CSSStyleSheet_h
#include "mozilla/Attributes.h"
#include "mozilla/IncrementalClearCOMRuleArray.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/StyleSheet.h"
#include "mozilla/StyleSheetInfo.h"
#include "mozilla/css/SheetParsingMode.h"
#include "nscore.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsTArrayForwardDeclare.h"
#include "nsString.h"
#include "mozilla/CORSMode.h"
#include "nsCycleCollectionParticipant.h"
#include "mozilla/net/ReferrerPolicy.h"
#include "mozilla/dom/SRIMetadata.h"
class CSSRuleListImpl;
class nsCSSRuleProcessor;
class nsIURI;
class nsMediaQueryResultCacheKey;
class nsPresContext;
class nsXMLNameSpaceMap;
namespace mozilla {
class CSSStyleSheet;
struct ChildSheetListBuilder;
namespace css {
class GroupRule;
} // namespace css
namespace dom {
class CSSRuleList;
class Element;
} // namespace dom
// -------------------------------
// CSS Style Sheet Inner Data Container
//
struct CSSStyleSheetInner : public StyleSheetInfo
{
CSSStyleSheetInner(CORSMode aCORSMode,
ReferrerPolicy aReferrerPolicy,
const dom::SRIMetadata& aIntegrity);
CSSStyleSheetInner(CSSStyleSheetInner& aCopy,
CSSStyleSheet* aPrimarySheet);
~CSSStyleSheetInner();
StyleSheetInfo* CloneFor(StyleSheet* aPrimarySheet) override;
void RemoveSheet(StyleSheet* aSheet) override;
void RebuildNameSpaces();
// Create a new namespace map
nsresult CreateNamespaceMap();
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
IncrementalClearCOMRuleArray mOrderedRules;
nsAutoPtr<nsXMLNameSpaceMap> mNameSpaceMap;
};
// -------------------------------
// CSS Style Sheet
//
// CID for the CSSStyleSheet class
// 7985c7ac-9ddc-444d-9899-0c86ec122f54
#define NS_CSS_STYLE_SHEET_IMPL_CID \
{ 0x7985c7ac, 0x9ddc, 0x444d, \
{ 0x98, 0x99, 0x0c, 0x86, 0xec, 0x12, 0x2f, 0x54 } }
class CSSStyleSheet final : public StyleSheet
{
public:
typedef net::ReferrerPolicy ReferrerPolicy;
CSSStyleSheet(css::SheetParsingMode aParsingMode,
CORSMode aCORSMode, ReferrerPolicy aReferrerPolicy);
CSSStyleSheet(css::SheetParsingMode aParsingMode,
CORSMode aCORSMode, ReferrerPolicy aReferrerPolicy,
const dom::SRIMetadata& aIntegrity);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(CSSStyleSheet, StyleSheet)
NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_STYLE_SHEET_IMPL_CID)
bool HasRules() const;
#ifdef DEBUG
void List(FILE* out = stdout, int32_t aIndent = 0) const override;
#endif
// XXX do these belong here or are they generic?
void AppendStyleRule(css::Rule* aRule);
int32_t StyleRuleCount() const;
css::Rule* GetStyleRuleAt(int32_t aIndex) const;
nsXMLNameSpaceMap* GetNameSpaceMap() const {
return Inner()->mNameSpaceMap;
}
already_AddRefed<StyleSheet> Clone(StyleSheet* aCloneParent,
dom::CSSImportRule* aCloneOwnerRule,
nsIDocument* aCloneDocument,
nsINode* aCloneOwningNode) const final;
void SetModifiedByChildRule() {
NS_ASSERTION(mDirty,
"sheet must be marked dirty before handing out child rules");
DidDirty();
}
nsresult AddRuleProcessor(nsCSSRuleProcessor* aProcessor);
nsresult DropRuleProcessor(nsCSSRuleProcessor* aProcessor);
// nsICSSLoaderObserver interface
NS_IMETHOD StyleSheetLoaded(StyleSheet* aSheet, bool aWasAlternate,
nsresult aStatus) override;
bool UseForPresentation(nsPresContext* aPresContext,
nsMediaQueryResultCacheKey& aKey) const;
nsresult ReparseSheet(const nsAString& aInput);
void SetInRuleProcessorCache() { mInRuleProcessorCache = true; }
// Function used as a callback to rebuild our inner's child sheet
// list after we clone a unique inner for ourselves.
static bool RebuildChildList(css::Rule* aRule,
ChildSheetListBuilder* aBuilder);
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
dom::Element* GetScopeElement() const { return mScopeElement; }
void SetScopeElement(dom::Element* aScopeElement);
void DidDirty() override;
private:
CSSStyleSheet(const CSSStyleSheet& aCopy,
CSSStyleSheet* aParentToUse,
dom::CSSImportRule* aOwnerRuleToUse,
nsIDocument* aDocumentToUse,
nsINode* aOwningNodeToUse);
CSSStyleSheet(const CSSStyleSheet& aCopy) = delete;
CSSStyleSheet& operator=(const CSSStyleSheet& aCopy) = delete;
protected:
virtual ~CSSStyleSheet();
void LastRelease();
void ClearRuleCascades();
// Add the namespace mapping from this @namespace rule to our namespace map
nsresult RegisterNamespaceRule(css::Rule* aRule);
// Drop our reference to mRuleCollection
void DropRuleCollection();
CSSStyleSheetInner* Inner() const
{
return static_cast<CSSStyleSheetInner*>(mInner);
}
// Unlink our inner, if needed, for cycle collection
virtual void UnlinkInner() override;
// Traverse our inner, if needed, for cycle collection
virtual void TraverseInner(nsCycleCollectionTraversalCallback &) override;
protected:
// Internal methods which do not have security check and completeness check.
dom::CSSRuleList* GetCssRulesInternal();
uint32_t InsertRuleInternal(const nsAString& aRule,
uint32_t aIndex, ErrorResult& aRv);
void DeleteRuleInternal(uint32_t aIndex, ErrorResult& aRv);
nsresult InsertRuleIntoGroupInternal(const nsAString& aRule,
css::GroupRule* aGroup,
uint32_t aIndex);
void EnabledStateChangedInternal();
RefPtr<CSSRuleListImpl> mRuleCollection;
bool mInRuleProcessorCache;
RefPtr<dom::Element> mScopeElement;
AutoTArray<nsCSSRuleProcessor*, 8>* mRuleProcessors;
friend class mozilla::StyleSheet;
friend class ::nsCSSRuleProcessor;
};
NS_DEFINE_STATIC_IID_ACCESSOR(CSSStyleSheet, NS_CSS_STYLE_SHEET_IMPL_CID)
} // namespace mozilla
#endif /* !defined(mozilla_CSSStyleSheet_h) */