зеркало из https://github.com/mozilla/gecko-dev.git
368 строки
13 KiB
C++
368 строки
13 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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/* representation of a CSS style sheet */
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#ifndef nsCSSStyleSheet_h_
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#define nsCSSStyleSheet_h_
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#include "mozilla/Attributes.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/dom/Element.h"
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#include "nscore.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "nsIStyleSheet.h"
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#include "nsIDOMCSSStyleSheet.h"
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#include "nsICSSLoaderObserver.h"
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#include "nsCOMArray.h"
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#include "nsTArray.h"
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#include "nsString.h"
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#include "mozilla/CORSMode.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsWrapperCache.h"
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class nsXMLNameSpaceMap;
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class nsCSSRuleProcessor;
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class nsIPrincipal;
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class nsIURI;
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class nsMediaList;
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class nsMediaQueryResultCacheKey;
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class nsCSSStyleSheet;
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class nsPresContext;
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namespace mozilla {
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namespace css {
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class Rule;
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class GroupRule;
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class ImportRule;
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}
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}
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// -------------------------------
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// CSS Style Sheet Inner Data Container
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//
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class nsCSSStyleSheetInner {
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public:
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friend class nsCSSStyleSheet;
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friend class nsCSSRuleProcessor;
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private:
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nsCSSStyleSheetInner(nsCSSStyleSheet* aPrimarySheet,
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mozilla::CORSMode aCORSMode);
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nsCSSStyleSheetInner(nsCSSStyleSheetInner& aCopy,
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nsCSSStyleSheet* aPrimarySheet);
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~nsCSSStyleSheetInner();
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nsCSSStyleSheetInner* CloneFor(nsCSSStyleSheet* aPrimarySheet);
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void AddSheet(nsCSSStyleSheet* aSheet);
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void RemoveSheet(nsCSSStyleSheet* aSheet);
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void RebuildNameSpaces();
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// Create a new namespace map
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nsresult CreateNamespaceMap();
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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nsAutoTArray<nsCSSStyleSheet*, 8> mSheets;
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nsCOMPtr<nsIURI> mSheetURI; // for error reports, etc.
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nsCOMPtr<nsIURI> mOriginalSheetURI; // for GetHref. Can be null.
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nsCOMPtr<nsIURI> mBaseURI; // for resolving relative URIs
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nsCOMPtr<nsIPrincipal> mPrincipal;
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nsCOMArray<mozilla::css::Rule> mOrderedRules;
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nsAutoPtr<nsXMLNameSpaceMap> mNameSpaceMap;
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// Linked list of child sheets. This is al fundamentally broken, because
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// each of the child sheets has a unique parent... We can only hope (and
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// currently this is the case) that any time page JS can get ts hands on a
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// child sheet that means we've already ensured unique inners throughout its
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// parent chain and things are good.
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nsRefPtr<nsCSSStyleSheet> mFirstChild;
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mozilla::CORSMode mCORSMode;
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bool mComplete;
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#ifdef DEBUG
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bool mPrincipalSet;
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#endif
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};
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// -------------------------------
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// CSS Style Sheet
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//
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class CSSRuleListImpl;
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// CID for the nsCSSStyleSheet class
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// ca926f30-2a7e-477e-8467-803fb32af20a
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#define NS_CSS_STYLE_SHEET_IMPL_CID \
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{ 0xca926f30, 0x2a7e, 0x477e, \
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{ 0x84, 0x67, 0x80, 0x3f, 0xb3, 0x2a, 0xf2, 0x0a } }
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class nsCSSStyleSheet MOZ_FINAL : public nsIStyleSheet,
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public nsIDOMCSSStyleSheet,
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public nsICSSLoaderObserver,
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public nsWrapperCache
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{
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public:
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nsCSSStyleSheet(mozilla::CORSMode aCORSMode);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsCSSStyleSheet,
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nsIStyleSheet)
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_STYLE_SHEET_IMPL_CID)
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// nsIStyleSheet interface
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virtual nsIURI* GetSheetURI() const MOZ_OVERRIDE;
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virtual nsIURI* GetBaseURI() const MOZ_OVERRIDE;
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virtual void GetTitle(nsString& aTitle) const MOZ_OVERRIDE;
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virtual void GetType(nsString& aType) const MOZ_OVERRIDE;
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virtual bool HasRules() const MOZ_OVERRIDE;
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virtual bool IsApplicable() const MOZ_OVERRIDE;
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virtual void SetEnabled(bool aEnabled) MOZ_OVERRIDE;
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virtual bool IsComplete() const MOZ_OVERRIDE;
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virtual void SetComplete() MOZ_OVERRIDE;
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virtual nsIStyleSheet* GetParentSheet() const MOZ_OVERRIDE; // may be null
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virtual nsIDocument* GetOwningDocument() const MOZ_OVERRIDE; // may be null
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virtual void SetOwningDocument(nsIDocument* aDocument) MOZ_OVERRIDE;
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// Find the ID of the owner inner window.
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uint64_t FindOwningWindowInnerID() const;
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#ifdef DEBUG
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virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
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#endif
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void AppendStyleSheet(nsCSSStyleSheet* aSheet);
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void InsertStyleSheetAt(nsCSSStyleSheet* aSheet, int32_t aIndex);
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// XXX do these belong here or are they generic?
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void PrependStyleRule(mozilla::css::Rule* aRule);
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void AppendStyleRule(mozilla::css::Rule* aRule);
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void ReplaceStyleRule(mozilla::css::Rule* aOld, mozilla::css::Rule* aNew);
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int32_t StyleRuleCount() const;
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mozilla::css::Rule* GetStyleRuleAt(int32_t aIndex) const;
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nsresult DeleteRuleFromGroup(mozilla::css::GroupRule* aGroup, uint32_t aIndex);
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nsresult InsertRuleIntoGroup(const nsAString& aRule, mozilla::css::GroupRule* aGroup, uint32_t aIndex, uint32_t* _retval);
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nsresult ReplaceRuleInGroup(mozilla::css::GroupRule* aGroup, mozilla::css::Rule* aOld, mozilla::css::Rule* aNew);
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int32_t StyleSheetCount() const;
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/**
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* SetURIs must be called on all sheets before parsing into them.
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* SetURIs may only be called while the sheet is 1) incomplete and 2)
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* has no rules in it
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*/
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void SetURIs(nsIURI* aSheetURI, nsIURI* aOriginalSheetURI, nsIURI* aBaseURI);
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/**
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* SetPrincipal should be called on all sheets before parsing into them.
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* This can only be called once with a non-null principal. Calling this with
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* a null pointer is allowed and is treated as a no-op.
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*/
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void SetPrincipal(nsIPrincipal* aPrincipal);
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// Principal() never returns a null pointer.
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nsIPrincipal* Principal() const { return mInner->mPrincipal; }
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// The document this style sheet is associated with. May be null
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nsIDocument* GetDocument() const { return mDocument; }
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void SetTitle(const nsAString& aTitle) { mTitle = aTitle; }
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void SetMedia(nsMediaList* aMedia);
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void SetOwningNode(nsINode* aOwningNode) { mOwningNode = aOwningNode; /* Not ref counted */ }
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void SetOwnerRule(mozilla::css::ImportRule* aOwnerRule) { mOwnerRule = aOwnerRule; /* Not ref counted */ }
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mozilla::css::ImportRule* GetOwnerRule() const { return mOwnerRule; }
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nsXMLNameSpaceMap* GetNameSpaceMap() const { return mInner->mNameSpaceMap; }
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already_AddRefed<nsCSSStyleSheet> Clone(nsCSSStyleSheet* aCloneParent,
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mozilla::css::ImportRule* aCloneOwnerRule,
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nsIDocument* aCloneDocument,
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nsINode* aCloneOwningNode) const;
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bool IsModified() const { return mDirty; }
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void SetModifiedByChildRule() {
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NS_ASSERTION(mDirty,
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"sheet must be marked dirty before handing out child rules");
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DidDirty();
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}
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nsresult AddRuleProcessor(nsCSSRuleProcessor* aProcessor);
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nsresult DropRuleProcessor(nsCSSRuleProcessor* aProcessor);
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/**
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* Like the DOM insertRule() method, but doesn't do any security checks
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*/
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nsresult InsertRuleInternal(const nsAString& aRule,
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uint32_t aIndex, uint32_t* aReturn);
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/* Get the URI this sheet was originally loaded from, if any. Can
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return null */
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virtual nsIURI* GetOriginalURI() const;
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// nsICSSLoaderObserver interface
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NS_IMETHOD StyleSheetLoaded(nsCSSStyleSheet* aSheet, bool aWasAlternate,
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nsresult aStatus) MOZ_OVERRIDE;
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enum EnsureUniqueInnerResult {
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// No work was needed to ensure a unique inner.
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eUniqueInner_AlreadyUnique,
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// A clone was done to ensure a unique inner (which means the style
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// rules in this sheet have changed).
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eUniqueInner_ClonedInner,
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// A clone was attempted, but it failed.
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eUniqueInner_CloneFailed
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};
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EnsureUniqueInnerResult EnsureUniqueInner();
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// Append all of this sheet's child sheets to aArray. Return true
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// on success and false on allocation failure.
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bool AppendAllChildSheets(nsTArray<nsCSSStyleSheet*>& aArray);
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bool UseForPresentation(nsPresContext* aPresContext,
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nsMediaQueryResultCacheKey& aKey) const;
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nsresult ParseSheet(const nsAString& aInput);
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// nsIDOMStyleSheet interface
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NS_DECL_NSIDOMSTYLESHEET
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// nsIDOMCSSStyleSheet interface
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NS_DECL_NSIDOMCSSSTYLESHEET
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// Function used as a callback to rebuild our inner's child sheet
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// list after we clone a unique inner for ourselves.
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static bool RebuildChildList(mozilla::css::Rule* aRule, void* aBuilder);
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
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// Get this style sheet's CORS mode
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mozilla::CORSMode GetCORSMode() const { return mInner->mCORSMode; }
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mozilla::dom::Element* GetScopeElement() const { return mScopeElement; }
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void SetScopeElement(mozilla::dom::Element* aScopeElement)
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{
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mScopeElement = aScopeElement;
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}
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// WebIDL StyleSheet API
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// Our nsIStyleSheet::GetType is a const method, so it ends up
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// ambiguous with with the XPCOM version. Just disambiguate.
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void GetType(nsString& aType) {
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const_cast<const nsCSSStyleSheet*>(this)->GetType(aType);
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}
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// Our XPCOM GetHref is fine for WebIDL
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nsINode* GetOwnerNode() const { return mOwningNode; }
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nsCSSStyleSheet* GetParentStyleSheet() const { return mParent; }
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// Our nsIStyleSheet::GetTitle is a const method, so it ends up
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// ambiguous with with the XPCOM version. Just disambiguate.
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void GetTitle(nsString& aTitle) {
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const_cast<const nsCSSStyleSheet*>(this)->GetTitle(aTitle);
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}
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nsIDOMMediaList* Media();
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bool Disabled() const { return mDisabled; }
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// The XPCOM SetDisabled is fine for WebIDL
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// WebIDL CSSStyleSheet API
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// Can't be inline because we can't include ImportRule here. And can't be
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// called GetOwnerRule because that would be ambiguous with the ImportRule
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// version.
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nsIDOMCSSRule* GetDOMOwnerRule() const;
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nsIDOMCSSRuleList* GetCssRules(mozilla::ErrorResult& aRv);
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uint32_t InsertRule(const nsAString& aRule, uint32_t aIndex,
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mozilla::ErrorResult& aRv) {
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uint32_t retval;
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aRv = InsertRule(aRule, aIndex, &retval);
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return retval;
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}
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void DeleteRule(uint32_t aIndex, mozilla::ErrorResult& aRv) {
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aRv = DeleteRule(aIndex);
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}
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// WebIDL miscellaneous bits
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mozilla::dom::ParentObject GetParentObject() const {
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if (mOwningNode) {
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return mozilla::dom::ParentObject(mOwningNode);
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}
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return mozilla::dom::ParentObject(static_cast<nsIStyleSheet*>(mParent),
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mParent);
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}
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virtual JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
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private:
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nsCSSStyleSheet(const nsCSSStyleSheet& aCopy,
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nsCSSStyleSheet* aParentToUse,
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mozilla::css::ImportRule* aOwnerRuleToUse,
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nsIDocument* aDocumentToUse,
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nsINode* aOwningNodeToUse);
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nsCSSStyleSheet(const nsCSSStyleSheet& aCopy) MOZ_DELETE;
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nsCSSStyleSheet& operator=(const nsCSSStyleSheet& aCopy) MOZ_DELETE;
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protected:
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virtual ~nsCSSStyleSheet();
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void ClearRuleCascades();
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nsresult WillDirty();
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void DidDirty();
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// Return success if the subject principal subsumes the principal of our
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// inner, error otherwise. This will also succeed if the subject has
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// UniversalXPConnect or if access is allowed by CORS. In the latter case,
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// it will set the principal of the inner to the subject principal.
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nsresult SubjectSubsumesInnerPrincipal();
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// Add the namespace mapping from this @namespace rule to our namespace map
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nsresult RegisterNamespaceRule(mozilla::css::Rule* aRule);
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// Drop our reference to mRuleCollection
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void DropRuleCollection();
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// Drop our reference to mMedia
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void DropMedia();
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// Unlink our inner, if needed, for cycle collection
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void UnlinkInner();
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// Traverse our inner, if needed, for cycle collection
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void TraverseInner(nsCycleCollectionTraversalCallback &);
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protected:
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nsString mTitle;
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nsRefPtr<nsMediaList> mMedia;
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nsRefPtr<nsCSSStyleSheet> mNext;
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nsCSSStyleSheet* mParent; // weak ref
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mozilla::css::ImportRule* mOwnerRule; // weak ref
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nsRefPtr<CSSRuleListImpl> mRuleCollection;
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nsIDocument* mDocument; // weak ref; parents maintain this for their children
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nsINode* mOwningNode; // weak ref
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bool mDisabled;
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bool mDirty; // has been modified
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nsRefPtr<mozilla::dom::Element> mScopeElement;
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nsCSSStyleSheetInner* mInner;
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nsAutoTArray<nsCSSRuleProcessor*, 8>* mRuleProcessors;
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friend class nsMediaList;
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friend class nsCSSRuleProcessor;
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friend struct ChildSheetListBuilder;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsCSSStyleSheet, NS_CSS_STYLE_SHEET_IMPL_CID)
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#endif /* !defined(nsCSSStyleSheet_h_) */
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