From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- layout/style/CSSStyleSheet.h | 281 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 281 insertions(+) create mode 100644 layout/style/CSSStyleSheet.h (limited to 'layout/style/CSSStyleSheet.h') diff --git a/layout/style/CSSStyleSheet.h b/layout/style/CSSStyleSheet.h new file mode 100644 index 000000000..74e12291e --- /dev/null +++ b/layout/style/CSSStyleSheet.h @@ -0,0 +1,281 @@ +/* -*- 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 "mozilla/dom/Element.h" + +#include "nscore.h" +#include "nsCOMPtr.h" +#include "nsAutoPtr.h" +#include "nsICSSLoaderObserver.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 nsMediaList; +class nsMediaQueryResultCacheKey; +class nsStyleSet; +class nsPresContext; +class nsXMLNameSpaceMap; + +namespace mozilla { +struct ChildSheetListBuilder; +class CSSStyleSheet; + +namespace css { +class Rule; +class GroupRule; +class ImportRule; +} // namespace css +namespace dom { +class CSSRuleList; +} // namespace dom + + // ------------------------------- +// CSS Style Sheet Inner Data Container +// + +struct CSSStyleSheetInner : public StyleSheetInfo +{ + CSSStyleSheetInner(CSSStyleSheet* aPrimarySheet, + CORSMode aCORSMode, + ReferrerPolicy aReferrerPolicy, + const dom::SRIMetadata& aIntegrity); + CSSStyleSheetInner(CSSStyleSheetInner& aCopy, + CSSStyleSheet* aPrimarySheet); + ~CSSStyleSheetInner(); + + CSSStyleSheetInner* CloneFor(CSSStyleSheet* aPrimarySheet); + void AddSheet(CSSStyleSheet* aSheet); + void RemoveSheet(CSSStyleSheet* aSheet); + + void RebuildNameSpaces(); + + // Create a new namespace map + nsresult CreateNamespaceMap(); + + size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const; + + AutoTArray mSheets; + IncrementalClearCOMRuleArray mOrderedRules; + nsAutoPtr mNameSpaceMap; + // Linked list of child sheets. This is al fundamentally broken, because + // each of the child sheets has a unique parent... We can only hope (and + // currently this is the case) that any time page JS can get ts hands on a + // child sheet that means we've already ensured unique inners throughout its + // parent chain and things are good. + RefPtr mFirstChild; +}; + + +// ------------------------------- +// 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 nsICSSLoaderObserver +{ +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; + + /** + * Set the stylesheet to be enabled. This may or may not make it + * applicable. Note that this WILL inform the sheet's document of + * its new applicable state if the state changes but WILL NOT call + * BeginUpdate() or EndUpdate() on the document -- calling those is + * the caller's responsibility. This allows use of SetEnabled when + * batched updates are desired. If you want updates handled for + * you, see nsIDOMStyleSheet::SetDisabled(). + */ + void SetEnabled(bool aEnabled); + + // style sheet owner info + CSSStyleSheet* GetParentSheet() const; // may be null + void SetOwningDocument(nsIDocument* aDocument); + + // Find the ID of the owner inner window. + uint64_t FindOwningWindowInnerID() const; +#ifdef DEBUG + void List(FILE* out = stdout, int32_t aIndent = 0) const; +#endif + + void AppendStyleSheet(CSSStyleSheet* aSheet); + + // 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; + + nsresult DeleteRuleFromGroup(css::GroupRule* aGroup, uint32_t aIndex); + nsresult InsertRuleIntoGroup(const nsAString& aRule, css::GroupRule* aGroup, uint32_t aIndex, uint32_t* _retval); + + void SetTitle(const nsAString& aTitle) { mTitle = aTitle; } + void SetMedia(nsMediaList* aMedia); + + void SetOwnerRule(css::ImportRule* aOwnerRule) { mOwnerRule = aOwnerRule; /* Not ref counted */ } + css::ImportRule* GetOwnerRule() const { return mOwnerRule; } + // Workaround overloaded-virtual warning in GCC. + using StyleSheet::GetOwnerRule; + + nsXMLNameSpaceMap* GetNameSpaceMap() const { return mInner->mNameSpaceMap; } + + already_AddRefed Clone(CSSStyleSheet* aCloneParent, + css::ImportRule* aCloneOwnerRule, + nsIDocument* aCloneDocument, + nsINode* aCloneOwningNode) const; + + bool IsModified() const { return mDirty; } + + void SetModifiedByChildRule() { + NS_ASSERTION(mDirty, + "sheet must be marked dirty before handing out child rules"); + DidDirty(); + } + + nsresult AddRuleProcessor(nsCSSRuleProcessor* aProcessor); + nsresult DropRuleProcessor(nsCSSRuleProcessor* aProcessor); + + void AddStyleSet(nsStyleSet* aStyleSet); + void DropStyleSet(nsStyleSet* aStyleSet); + + // nsICSSLoaderObserver interface + NS_IMETHOD StyleSheetLoaded(StyleSheet* aSheet, bool aWasAlternate, + nsresult aStatus) override; + + void EnsureUniqueInner(); + + // Append all of this sheet's child sheets to aArray. + void AppendAllChildSheets(nsTArray& aArray); + + 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, void* aBuilder); + + size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const; + + dom::Element* GetScopeElement() const { return mScopeElement; } + void SetScopeElement(dom::Element* aScopeElement) + { + mScopeElement = aScopeElement; + } + + // WebIDL StyleSheet API + nsMediaList* Media() final; + + // WebIDL CSSStyleSheet API + // Can't be inline because we can't include ImportRule here. And can't be + // called GetOwnerRule because that would be ambiguous with the ImportRule + // version. + nsIDOMCSSRule* GetDOMOwnerRule() const final; + + void WillDirty(); + void DidDirty(); + +private: + CSSStyleSheet(const CSSStyleSheet& aCopy, + CSSStyleSheet* aParentToUse, + css::ImportRule* aOwnerRuleToUse, + nsIDocument* aDocumentToUse, + nsINode* aOwningNodeToUse); + + CSSStyleSheet(const CSSStyleSheet& aCopy) = delete; + CSSStyleSheet& operator=(const CSSStyleSheet& aCopy) = delete; + +protected: + virtual ~CSSStyleSheet(); + + 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(); + + // Drop our reference to mMedia + void DropMedia(); + + // Unlink our inner, if needed, for cycle collection + void UnlinkInner(); + // Traverse our inner, if needed, for cycle collection + void TraverseInner(nsCycleCollectionTraversalCallback &); + +protected: + // Internal methods which do not have security check and completeness check. + dom::CSSRuleList* GetCssRulesInternal(ErrorResult& aRv); + uint32_t InsertRuleInternal(const nsAString& aRule, + uint32_t aIndex, ErrorResult& aRv); + void DeleteRuleInternal(uint32_t aIndex, ErrorResult& aRv); + + RefPtr mMedia; + RefPtr mNext; + CSSStyleSheet* mParent; // weak ref + css::ImportRule* mOwnerRule; // weak ref + + RefPtr mRuleCollection; + bool mDirty; // has been modified + bool mInRuleProcessorCache; + RefPtr mScopeElement; + + CSSStyleSheetInner* mInner; + + AutoTArray* mRuleProcessors; + nsTArray mStyleSets; + + friend class ::nsMediaList; + friend class ::nsCSSRuleProcessor; + friend class mozilla::StyleSheet; + friend struct mozilla::ChildSheetListBuilder; +}; + +NS_DEFINE_STATIC_IID_ACCESSOR(CSSStyleSheet, NS_CSS_STYLE_SHEET_IMPL_CID) + +} // namespace mozilla + +#endif /* !defined(mozilla_CSSStyleSheet_h) */ -- cgit v1.2.3