The Tor Browser: content/xul/document/src/XULDocument.h@97036ab72558 (annotated)

content/xul/document/src/XULDocument.h@97036ab72558 (annotated)

content/xul/document/src/XULDocument.h

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* 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/. */
 #ifndef mozilla_dom_XULDocument_h
 #define mozilla_dom_XULDocument_h
 #include "nsCOMPtr.h"
 #include "nsXULPrototypeDocument.h"
 #include "nsXULPrototypeCache.h"
 #include "nsTArray.h"
 #include "mozilla/dom/XMLDocument.h"
 #include "nsForwardReference.h"
 #include "nsIContent.h"
 #include "nsIDOMXULCommandDispatcher.h"
 #include "nsIDOMXULDocument.h"
 #include "nsCOMArray.h"
 #include "nsIURI.h"
 #include "nsIXULDocument.h"
 #include "nsScriptLoader.h"
 #include "nsIStreamListener.h"
 #include "nsICSSLoaderObserver.h"
 #include "mozilla/Attributes.h"
 #include "js/TracingAPI.h"
 #include "js/TypeDecls.h"
 class nsIRDFResource;
 class nsIRDFService;
 class nsPIWindowRoot;
 #if 0 // XXXbe save me, scc (need NSCAP_FORWARD_DECL(nsXULPrototypeScript))
 class nsIObjectInputStream;
 class nsIObjectOutputStream;
 class nsIXULPrototypeScript;
 #else
 #include "nsIObjectInputStream.h"
 #include "nsIObjectOutputStream.h"
 #include "nsXULElement.h"
 #endif
 #include "nsURIHashKey.h"
 #include "nsInterfaceHashtable.h"
 struct PRLogModuleInfo;
 class nsRefMapEntry : public nsStringHashKey
 {
 public:
   nsRefMapEntry(const nsAString& aKey) :
     nsStringHashKey(&aKey)
   {
   }
   nsRefMapEntry(const nsAString *aKey) :
     nsStringHashKey(aKey)
   {
   }
   nsRefMapEntry(const nsRefMapEntry& aOther) :
     nsStringHashKey(&aOther.GetKey())
   {
     NS_ERROR("Should never be called");
   }
   mozilla::dom::Element* GetFirstElement();
   void AppendAll(nsCOMArray<nsIContent>* aElements);
   /**
    * @return true if aElement was added, false if we failed due to OOM
    */
   bool AddElement(mozilla::dom::Element* aElement);
   /**
    * @return true if aElement was removed and it was the last content for
    * this ref, so this entry should be removed from the map
    */
   bool RemoveElement(mozilla::dom::Element* aElement);
 private:
   nsSmallVoidArray mRefContentList;
 };
 /**
  * The XUL document class
  */
 namespace mozilla {
 namespace dom {
 class XULDocument MOZ_FINAL : public XMLDocument,
                               public nsIXULDocument,
                               public nsIDOMXULDocument,
                               public nsIStreamLoaderObserver,
                               public nsICSSLoaderObserver,
                               public nsIOffThreadScriptReceiver
 {
 public:
     XULDocument();
     virtual ~XULDocument();
     // nsISupports interface
     NS_DECL_ISUPPORTS_INHERITED
     NS_DECL_NSISTREAMLOADEROBSERVER
     // nsIDocument interface
     virtual void Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup) MOZ_OVERRIDE;
     virtual void ResetToURI(nsIURI *aURI, nsILoadGroup* aLoadGroup,
                             nsIPrincipal* aPrincipal) MOZ_OVERRIDE;
     virtual nsresult StartDocumentLoad(const char* aCommand,
                                        nsIChannel *channel,
                                        nsILoadGroup* aLoadGroup,
                                        nsISupports* aContainer,
                                        nsIStreamListener **aDocListener,
                                        bool aReset = true,
                                        nsIContentSink* aSink = nullptr) MOZ_OVERRIDE;
     virtual void SetContentType(const nsAString& aContentType) MOZ_OVERRIDE;
     virtual void EndLoad() MOZ_OVERRIDE;
     // nsIMutationObserver interface
     NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
     NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
     NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
     NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
     NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTEWILLCHANGE
     // nsIXULDocument interface
     virtual void GetElementsForID(const nsAString& aID,
                                   nsCOMArray<nsIContent>& aElements) MOZ_OVERRIDE;
     NS_IMETHOD AddSubtreeToDocument(nsIContent* aContent) MOZ_OVERRIDE;
     NS_IMETHOD RemoveSubtreeFromDocument(nsIContent* aContent) MOZ_OVERRIDE;
     NS_IMETHOD SetTemplateBuilderFor(nsIContent* aContent,
                                      nsIXULTemplateBuilder* aBuilder) MOZ_OVERRIDE;
     NS_IMETHOD GetTemplateBuilderFor(nsIContent* aContent,
                                      nsIXULTemplateBuilder** aResult) MOZ_OVERRIDE;
     NS_IMETHOD OnPrototypeLoadDone(bool aResumeWalk) MOZ_OVERRIDE;
     bool OnDocumentParserError() MOZ_OVERRIDE;
     // nsINode interface overrides
     virtual nsresult Clone(nsINodeInfo *aNodeInfo, nsINode **aResult) const MOZ_OVERRIDE;
     // nsIDOMNode interface
     NS_FORWARD_NSIDOMNODE_TO_NSINODE
     // nsIDOMDocument interface
     using nsDocument::CreateElement;
     using nsDocument::CreateElementNS;
     NS_FORWARD_NSIDOMDOCUMENT(XMLDocument::)
     // And explicitly import the things from nsDocument that we just shadowed
     using nsDocument::GetImplementation;
     using nsDocument::GetTitle;
     using nsDocument::SetTitle;
     using nsDocument::GetLastStyleSheetSet;
     using nsDocument::MozSetImageElement;
     using nsDocument::GetMozFullScreenElement;
     using nsIDocument::GetLocation;
     // nsDocument interface overrides
     virtual Element* GetElementById(const nsAString & elementId) MOZ_OVERRIDE;
     // nsIDOMXULDocument interface
     NS_DECL_NSIDOMXULDOCUMENT
     // nsICSSLoaderObserver
     NS_IMETHOD StyleSheetLoaded(nsCSSStyleSheet* aSheet,
                                 bool aWasAlternate,
                                 nsresult aStatus) MOZ_OVERRIDE;
     virtual void EndUpdate(nsUpdateType aUpdateType) MOZ_OVERRIDE;
     virtual bool IsDocumentRightToLeft() MOZ_OVERRIDE;
     virtual void ResetDocumentDirection() MOZ_OVERRIDE;
     virtual int GetDocumentLWTheme() MOZ_OVERRIDE;
     virtual void ResetDocumentLWTheme() MOZ_OVERRIDE { mDocLWTheme = Doc_Theme_Uninitialized; }
     NS_IMETHOD OnScriptCompileComplete(JSScript* aScript, nsresult aStatus) MOZ_OVERRIDE;
     static bool
     MatchAttribute(nsIContent* aContent,
                    int32_t aNameSpaceID,
                    nsIAtom* aAttrName,
                    void* aData);
     NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(XULDocument, XMLDocument)
     void TraceProtos(JSTracer* aTrc, uint32_t aGCNumber);
     // WebIDL API
     already_AddRefed<nsINode> GetPopupNode();
     void SetPopupNode(nsINode* aNode);
     already_AddRefed<nsINode> GetPopupRangeParent(ErrorResult& aRv);
     int32_t GetPopupRangeOffset(ErrorResult& aRv);
     already_AddRefed<nsINode> GetTooltipNode();
     void SetTooltipNode(nsINode* aNode) { /* do nothing */ }
     nsIDOMXULCommandDispatcher* GetCommandDispatcher() const
     {
         return mCommandDispatcher;
     }
     int32_t GetWidth(ErrorResult& aRv);
     int32_t GetHeight(ErrorResult& aRv);
     already_AddRefed<nsINodeList>
       GetElementsByAttribute(const nsAString& aAttribute,
                              const nsAString& aValue);
     already_AddRefed<nsINodeList>
       GetElementsByAttributeNS(const nsAString& aNamespaceURI,
                                const nsAString& aAttribute,
                                const nsAString& aValue,
                                ErrorResult& aRv);
     void AddBroadcastListenerFor(Element& aBroadcaster, Element& aListener,
                                  const nsAString& aAttr, ErrorResult& aRv);
     void RemoveBroadcastListenerFor(Element& aBroadcaster, Element& aListener,
                                     const nsAString& aAttr);
     void Persist(const nsAString& aId, const nsAString& aAttr, ErrorResult& aRv)
     {
         aRv = Persist(aId, aAttr);
     }
     using nsDocument::GetBoxObjectFor;
     void LoadOverlay(const nsAString& aURL, nsIObserver* aObserver,
                      ErrorResult& aRv)
     {
         aRv = LoadOverlay(aURL, aObserver);
     }
 protected:
     // Implementation methods
     friend nsresult
     (::NS_NewXULDocument(nsIXULDocument** aResult));
     nsresult Init(void) MOZ_OVERRIDE;
     nsresult StartLayout(void);
     nsresult
     AddElementToRefMap(Element* aElement);
     void
     RemoveElementFromRefMap(Element* aElement);
     nsresult GetViewportSize(int32_t* aWidth, int32_t* aHeight);
     nsresult PrepareToLoad(nsISupports* aContainer,
                            const char* aCommand,
                            nsIChannel* aChannel,
                            nsILoadGroup* aLoadGroup,
                            nsIParser** aResult);
     nsresult
     PrepareToLoadPrototype(nsIURI* aURI,
                            const char* aCommand,
                            nsIPrincipal* aDocumentPrincipal,
                            nsIParser** aResult);
     nsresult
     LoadOverlayInternal(nsIURI* aURI, bool aIsDynamic, bool* aShouldReturn,
                         bool* aFailureFromContent);
     nsresult ApplyPersistentAttributes();
     nsresult ApplyPersistentAttributesInternal();
     nsresult ApplyPersistentAttributesToElements(nsIRDFResource* aResource,
                                                  nsCOMArray<nsIContent>& aElements);
     nsresult
     AddElementToDocumentPre(Element* aElement);
     nsresult
     AddElementToDocumentPost(Element* aElement);
     nsresult
     ExecuteOnBroadcastHandlerFor(Element* aBroadcaster,
                                  Element* aListener,
                                  nsIAtom* aAttr);
     nsresult
     BroadcastAttributeChangeFromOverlay(nsIContent* aNode,
                                         int32_t aNameSpaceID,
                                         nsIAtom* aAttribute,
                                         nsIAtom* aPrefix,
                                         const nsAString& aValue);
     already_AddRefed<nsPIWindowRoot> GetWindowRoot();
     static NS_HIDDEN_(void) DirectionChanged(const char* aPrefName, void* aData);
     // pseudo constants
     static int32_t gRefCnt;
     static nsIAtom** kIdentityAttrs[];
     static nsIRDFService* gRDFService;
     static nsIRDFResource* kNC_persist;
     static nsIRDFResource* kNC_attribute;
     static nsIRDFResource* kNC_value;
     static PRLogModuleInfo* gXULLog;
     nsresult
     Persist(nsIContent* aElement, int32_t aNameSpaceID, nsIAtom* aAttribute);
     virtual JSObject* WrapNode(JSContext *aCx) MOZ_OVERRIDE;
     // IMPORTANT: The ownership implicit in the following member
     // variables has been explicitly checked and set using nsCOMPtr
     // for owning pointers and raw COM interface pointers for weak
     // (ie, non owning) references. If you add any members to this
     // class, please make the ownership explicit (pinkerton, scc).
     // NOTE, THIS IS STILL IN PROGRESS, TALK TO PINK OR SCC BEFORE
     // CHANGING
     XULDocument*             mNextSrcLoadWaiter;  // [OWNER] but not COMPtr
     // Tracks elements with a 'ref' attribute, or an 'id' attribute where
     // the element's namespace has no registered ID attribute name.
     nsTHashtable<nsRefMapEntry> mRefMap;
     nsCOMPtr<nsIRDFDataSource> mLocalStore;
     bool                       mApplyingPersistedAttrs;
     bool                       mIsWritingFastLoad;
     bool                       mDocumentLoaded;
     /**
      * Since ResumeWalk is interruptible, it's possible that last
      * stylesheet finishes loading while the PD walk is still in
      * progress (waiting for an overlay to finish loading).
      * mStillWalking prevents DoneLoading (and StartLayout) from being
      * called in this situation.
      */
     bool                       mStillWalking;
     /**
      * These two values control where persistent attributes get applied.
      */
     bool                           mRestrictPersistence;
     nsTHashtable<nsStringHashKey>  mPersistenceIds;
     /**
      * An array of style sheets, that will be added (preserving order) to the
      * document after all of them are loaded (in DoneWalking).
      */
     nsTArray<nsRefPtr<nsCSSStyleSheet> > mOverlaySheets;
     nsCOMPtr<nsIDOMXULCommandDispatcher>     mCommandDispatcher; // [OWNER] of the focus tracker
     // Maintains the template builders that have been attached to
     // content elements
     typedef nsInterfaceHashtable<nsISupportsHashKey, nsIXULTemplateBuilder>
         BuilderTable;
     BuilderTable* mTemplateBuilderTable;
     uint32_t mPendingSheets;
     /**
      * document lightweight theme for use with :-moz-lwtheme, :-moz-lwtheme-brighttext
      * and :-moz-lwtheme-darktext
      */
     DocumentTheme                         mDocLWTheme;
     /**
      * Context stack, which maintains the state of the Builder and allows
      * it to be interrupted.
      */
     class ContextStack {
     protected:
         struct Entry {
             nsXULPrototypeElement* mPrototype;
             nsIContent*            mElement;
             int32_t                mIndex;
             Entry*                 mNext;
         };
         Entry* mTop;
         int32_t mDepth;
     public:
         ContextStack();
         ~ContextStack();
         int32_t Depth() { return mDepth; }
         nsresult Push(nsXULPrototypeElement* aPrototype, nsIContent* aElement);
         nsresult Pop();
         nsresult Peek(nsXULPrototypeElement** aPrototype, nsIContent** aElement, int32_t* aIndex);
         nsresult SetTopIndex(int32_t aIndex);
     };
     friend class ContextStack;
     ContextStack mContextStack;
     enum State { eState_Master, eState_Overlay };
     State mState;
     /**
      * An array of overlay nsIURIs that have yet to be resolved. The
      * order of the array is significant: overlays at the _end_ of the
      * array are resolved before overlays earlier in the array (i.e.,
      * it is a stack).
      *
      * In the current implementation the order the overlays are loaded
      * in is as follows: first overlays from xul-overlay PIs, in the
      * same order as in the document, then the overlays from the chrome
      * registry.
      */
     nsTArray<nsCOMPtr<nsIURI> > mUnloadedOverlays;
     /**
      * Load the transcluded script at the specified URI. If the
      * prototype construction must 'block' until the load has
      * completed, aBlock will be set to true.
      */
     nsresult LoadScript(nsXULPrototypeScript *aScriptProto, bool* aBlock);
     /**
      * Execute the precompiled script object scoped by this XUL document's
      * containing window object, and using its associated script context.
      */
     nsresult ExecuteScript(nsIScriptContext *aContext,
                            JS::Handle<JSScript*> aScriptObject);
     /**
      * Helper method for the above that uses aScript to find the appropriate
      * script context and object.
      */
     nsresult ExecuteScript(nsXULPrototypeScript *aScript);
     /**
      * Create a delegate content model element from a prototype.
      * Note that the resulting content node is not bound to any tree
      */
     nsresult CreateElementFromPrototype(nsXULPrototypeElement* aPrototype,
                                         Element** aResult,
                                         bool aIsRoot);
     /**
      * Create a hook-up element to which content nodes can be attached for
      * later resolution.
      */
     nsresult CreateOverlayElement(nsXULPrototypeElement* aPrototype,
                                   Element** aResult);
     /**
      * Add attributes from the prototype to the element.
      */
     nsresult AddAttributes(nsXULPrototypeElement* aPrototype, nsIContent* aElement);
     /**
      * The prototype-script of the current transcluded script that is being
      * loaded.  For document.write('<script src="nestedwrite.js"><\/script>')
      * to work, these need to be in a stack element type, and we need to hold
      * the top of stack here.
      */
     nsXULPrototypeScript* mCurrentScriptProto;
     /**
      * Whether the current transcluded script is being compiled off thread.
      * The load event is blocked while this is in progress.
      */
     bool mOffThreadCompiling;
     /**
      * If the current transcluded script is being compiled off thread, the
      * source for that script.
      */
     jschar* mOffThreadCompileStringBuf;
     size_t mOffThreadCompileStringLength;
     /**
      * Check if a XUL template builder has already been hooked up.
      */
     static nsresult
     CheckTemplateBuilderHookup(nsIContent* aElement, bool* aNeedsHookup);
     /**
      * Create a XUL template builder on the specified node.
      */
     static nsresult
     CreateTemplateBuilder(nsIContent* aElement);
     /**
      * Add the current prototype's style sheets (currently it's just
      * style overlays from the chrome registry) to the document.
      */
     nsresult AddPrototypeSheets();
 protected:
     /* Declarations related to forward references.
      *
      * Forward references are declarations which are added to the temporary
      * list (mForwardReferences) during the document (or overlay) load and
      * are resolved later, when the document loading is almost complete.
      */
     /**
      * The list of different types of forward references to resolve. After
      * a reference is resolved, it is removed from this array (and
      * automatically deleted)
      */
     nsTArray<nsAutoPtr<nsForwardReference> > mForwardReferences;
     /** Indicates what kind of forward references are still to be processed. */
     nsForwardReference::Phase mResolutionPhase;
     /**
      * Adds aRef to the mForwardReferences array. Takes the ownership of aRef.
      */
     nsresult AddForwardReference(nsForwardReference* aRef);
     /**
      * Resolve all of the document's forward references.
      */
     nsresult ResolveForwardReferences();
     /**
      * Used to resolve broadcaster references
      */
     class BroadcasterHookup : public nsForwardReference
     {
     protected:
         XULDocument* mDocument;              // [WEAK]
         nsRefPtr<Element> mObservesElement; // [OWNER]
         bool mResolved;
     public:
         BroadcasterHookup(XULDocument* aDocument,
                           Element* aObservesElement)
             : mDocument(aDocument),
               mObservesElement(aObservesElement),
               mResolved(false)
         {
         }
         virtual ~BroadcasterHookup();
         virtual Phase GetPhase() MOZ_OVERRIDE { return eHookup; }
         virtual Result Resolve() MOZ_OVERRIDE;
     };
     friend class BroadcasterHookup;
     /**
      * Used to hook up overlays
      */
     class OverlayForwardReference : public nsForwardReference
     {
     protected:
         XULDocument* mDocument;      // [WEAK]
         nsCOMPtr<nsIContent> mOverlay; // [OWNER]
         bool mResolved;
         nsresult Merge(nsIContent* aTargetNode, nsIContent* aOverlayNode, bool aNotify);
     public:
         OverlayForwardReference(XULDocument* aDocument, nsIContent* aOverlay)
             : mDocument(aDocument), mOverlay(aOverlay), mResolved(false) {}
         virtual ~OverlayForwardReference();
         virtual Phase GetPhase() MOZ_OVERRIDE { return eConstruction; }
         virtual Result Resolve() MOZ_OVERRIDE;
     };
     friend class OverlayForwardReference;
     class TemplateBuilderHookup : public nsForwardReference
     {
     protected:
         nsCOMPtr<nsIContent> mElement; // [OWNER]
     public:
         TemplateBuilderHookup(nsIContent* aElement)
             : mElement(aElement) {}
         virtual Phase GetPhase() MOZ_OVERRIDE { return eHookup; }
         virtual Result Resolve() MOZ_OVERRIDE;
     };
     friend class TemplateBuilderHookup;
     // The out params of FindBroadcaster only have values that make sense when
     // the method returns NS_FINDBROADCASTER_FOUND.  In all other cases, the
     // values of the out params should not be relied on (though *aListener and
     // *aBroadcaster do need to be released if non-null, of course).
     nsresult
     FindBroadcaster(Element* aElement,
                     Element** aListener,
                     nsString& aBroadcasterID,
                     nsString& aAttribute,
                     Element** aBroadcaster);
     nsresult
     CheckBroadcasterHookup(Element* aElement,
                            bool* aNeedsHookup,
                            bool* aDidResolve);
     void
     SynchronizeBroadcastListener(Element *aBroadcaster,
                                  Element *aListener,
                                  const nsAString &aAttr);
     static
     nsresult
     InsertElement(nsINode* aParent, nsIContent* aChild, bool aNotify);
     static
     nsresult
     RemoveElement(nsINode* aParent, nsINode* aChild);
     /**
      * The current prototype that we are walking to construct the
      * content model.
      */
     nsRefPtr<nsXULPrototypeDocument> mCurrentPrototype;
     /**
      * The master document (outermost, .xul) prototype, from which
      * all subdocuments get their security principals.
      */
     nsRefPtr<nsXULPrototypeDocument> mMasterPrototype;
     /**
      * Owning references to all of the prototype documents that were
      * used to construct this document.
      */
     nsTArray< nsRefPtr<nsXULPrototypeDocument> > mPrototypes;
     /**
      * Prepare to walk the current prototype.
      */
     nsresult PrepareToWalk();
     /**
      * Creates a processing instruction based on aProtoPI and inserts
      * it to the DOM (as the aIndex-th child of aParent).
      */
     nsresult
     CreateAndInsertPI(const nsXULPrototypePI* aProtoPI,
                       nsINode* aParent, uint32_t aIndex);
     /**
      * Inserts the passed <?xml-stylesheet ?> PI at the specified
      * index. Loads and applies the associated stylesheet
      * asynchronously.
      * The prototype document walk can happen before the stylesheets
      * are loaded, but the final steps in the load process (see
      * DoneWalking()) are not run before all the stylesheets are done
      * loading.
      */
     nsresult
     InsertXMLStylesheetPI(const nsXULPrototypePI* aProtoPI,
                           nsINode* aParent,
                           uint32_t aIndex,
                           nsIContent* aPINode);
     /**
      * Inserts the passed <?xul-overlay ?> PI at the specified index.
      * Schedules the referenced overlay URI for further processing.
      */
     nsresult
     InsertXULOverlayPI(const nsXULPrototypePI* aProtoPI,
                        nsINode* aParent,
                        uint32_t aIndex,
                        nsIContent* aPINode);
     /**
      * Add overlays from the chrome registry to the set of unprocessed
      * overlays still to do.
      */
     nsresult AddChromeOverlays();
     /**
      * Resume (or initiate) an interrupted (or newly prepared)
      * prototype walk.
      */
     nsresult ResumeWalk();
     /**
      * Called at the end of ResumeWalk() and from StyleSheetLoaded().
      * Expects that both the prototype document walk is complete and
      * all referenced stylesheets finished loading.
      */
     nsresult DoneWalking();
     /**
      * Report that an overlay failed to load
      * @param aURI the URI of the overlay that failed to load
      */
     void ReportMissingOverlay(nsIURI* aURI);
     class CachedChromeStreamListener : public nsIStreamListener {
     protected:
         XULDocument* mDocument;
         bool         mProtoLoaded;
         virtual ~CachedChromeStreamListener();
     public:
         CachedChromeStreamListener(XULDocument* aDocument,
                                    bool aProtoLoaded);
         NS_DECL_ISUPPORTS
         NS_DECL_NSIREQUESTOBSERVER
         NS_DECL_NSISTREAMLISTENER
     };
     friend class CachedChromeStreamListener;
     class ParserObserver : public nsIRequestObserver {
     protected:
         nsRefPtr<XULDocument> mDocument;
         nsRefPtr<nsXULPrototypeDocument> mPrototype;
         virtual ~ParserObserver();
     public:
         ParserObserver(XULDocument* aDocument,
                        nsXULPrototypeDocument* aPrototype);
         NS_DECL_ISUPPORTS
         NS_DECL_NSIREQUESTOBSERVER
     };
     friend class ParserObserver;
     /**
      * A map from a broadcaster element to a list of listener elements.
      */
     PLDHashTable* mBroadcasterMap;
     nsAutoPtr<nsInterfaceHashtable<nsURIHashKey,nsIObserver> > mOverlayLoadObservers;
     nsAutoPtr<nsInterfaceHashtable<nsURIHashKey,nsIObserver> > mPendingOverlayLoadNotifications;
     bool mInitialLayoutComplete;
     class nsDelayedBroadcastUpdate
     {
     public:
       nsDelayedBroadcastUpdate(Element* aBroadcaster,
                                Element* aListener,
                                const nsAString &aAttr)
       : mBroadcaster(aBroadcaster), mListener(aListener), mAttr(aAttr),
         mSetAttr(false), mNeedsAttrChange(false) {}
       nsDelayedBroadcastUpdate(Element* aBroadcaster,
                                Element* aListener,
                                nsIAtom* aAttrName,
                                const nsAString &aAttr,
                                bool aSetAttr,
                                bool aNeedsAttrChange)
       : mBroadcaster(aBroadcaster), mListener(aListener), mAttr(aAttr),
         mAttrName(aAttrName), mSetAttr(aSetAttr),
         mNeedsAttrChange(aNeedsAttrChange) {}
       nsDelayedBroadcastUpdate(const nsDelayedBroadcastUpdate& aOther)
       : mBroadcaster(aOther.mBroadcaster), mListener(aOther.mListener),
         mAttr(aOther.mAttr), mAttrName(aOther.mAttrName),
         mSetAttr(aOther.mSetAttr), mNeedsAttrChange(aOther.mNeedsAttrChange) {}
       nsCOMPtr<Element>       mBroadcaster;
       nsCOMPtr<Element>       mListener;
       // Note if mAttrName isn't used, this is the name of the attr, otherwise
       // this is the value of the attribute.
       nsString                mAttr;
       nsCOMPtr<nsIAtom>       mAttrName;
       bool                    mSetAttr;
       bool                    mNeedsAttrChange;
       class Comparator {
         public:
           static bool Equals(const nsDelayedBroadcastUpdate& a, const nsDelayedBroadcastUpdate& b) {
             return a.mBroadcaster == b.mBroadcaster && a.mListener == b.mListener && a.mAttrName == b.mAttrName;
           }
       };
     };
     nsTArray<nsDelayedBroadcastUpdate> mDelayedBroadcasters;
     nsTArray<nsDelayedBroadcastUpdate> mDelayedAttrChangeBroadcasts;
     bool                               mHandlingDelayedAttrChange;
     bool                               mHandlingDelayedBroadcasters;
     void MaybeBroadcast();
 private:
     // helpers
 };
 } // namespace dom
 } // namespace mozilla
 #endif // mozilla_dom_XULDocument_h

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content/xul/document/src/XULDocument.h@97036ab72558 (annotated)

content/xul/document/src/XULDocument.h