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Diffstat (limited to 'dom/base/Document.h')
| -rw-r--r-- | dom/base/Document.h | 5564 |
1 files changed, 5564 insertions, 0 deletions
diff --git a/dom/base/Document.h b/dom/base/Document.h new file mode 100644 index 0000000000..6a2bd55a9c --- /dev/null +++ b/dom/base/Document.h @@ -0,0 +1,5564 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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_Document_h___ +#define mozilla_dom_Document_h___ + +#include <bitset> +#include <cstddef> +#include <cstdint> +#include <new> +#include <utility> +#include "ErrorList.h" +#include "MainThreadUtils.h" +#include "Units.h" +#include "imgIRequest.h" +#include "js/RootingAPI.h" +#include "js/friend/DOMProxy.h" +#include "mozilla/AlreadyAddRefed.h" +#include "mozilla/Assertions.h" +#include "mozilla/Attributes.h" +#include "mozilla/BasicEvents.h" +#include "mozilla/BitSet.h" +#include "mozilla/OriginTrials.h" +#include "mozilla/ContentBlockingNotifier.h" +#include "mozilla/CORSMode.h" +#include "mozilla/CallState.h" +#include "mozilla/FlushType.h" +#include "mozilla/FunctionRef.h" +#include "mozilla/HashTable.h" +#include "mozilla/LinkedList.h" +#include "mozilla/Maybe.h" +#include "mozilla/MozPromise.h" +#include "mozilla/NotNull.h" +#include "mozilla/PointerLockManager.h" +#include "mozilla/PreloadService.h" +#include "mozilla/RefPtr.h" +#include "mozilla/Result.h" +#include "mozilla/SegmentedVector.h" +#include "mozilla/ServoStyleSet.h" +#include "mozilla/StorageAccessAPIHelper.h" +#include "mozilla/TimeStamp.h" +#include "mozilla/UniquePtr.h" +#include "mozilla/UseCounter.h" +#include "mozilla/WeakPtr.h" +#include "mozilla/css/StylePreloadKind.h" +#include "mozilla/dom/AnimationFrameProvider.h" +#include "mozilla/dom/DocumentOrShadowRoot.h" +#include "mozilla/dom/Element.h" +#include "mozilla/dom/EventTarget.h" +#include "mozilla/dom/Nullable.h" +#include "mozilla/dom/RadioGroupContainer.h" +#include "mozilla/dom/TreeOrderedArray.h" +#include "mozilla/dom/ViewportMetaData.h" +#include "mozilla/dom/LargestContentfulPaint.h" +#include "mozilla/dom/UserActivation.h" +#include "mozilla/dom/WakeLockBinding.h" +#include "mozilla/glean/GleanMetrics.h" +#include "nsAtom.h" +#include "nsCOMArray.h" +#include "nsCOMPtr.h" +#include "nsClassHashtable.h" +#include "nsCompatibility.h" +#include "nsContentListDeclarations.h" +#include "nsCycleCollectionParticipant.h" +#include "nsTHashMap.h" +#include "nsDebug.h" +#include "nsGkAtoms.h" +#include "nsHashKeys.h" +#include "nsIChannel.h" +#include "nsIChannelEventSink.h" +#include "nsID.h" +#include "nsIDocumentViewer.h" +#include "nsIInterfaceRequestor.h" +#include "nsILoadContext.h" +#include "nsILoadGroup.h" +#include "nsILoadInfo.h" +#include "nsINode.h" +#include "nsIObserver.h" +#include "nsIParser.h" +#include "nsIPrincipal.h" +#include "nsIProgressEventSink.h" +#include "nsIReferrerInfo.h" +#include "nsIRequestObserver.h" +#include "nsIScriptObjectPrincipal.h" +#include "nsIStreamListener.h" +#include "nsISupports.h" +#include "nsISupportsUtils.h" +#include "nsITransportSecurityInfo.h" +#include "nsIURI.h" +#include "nsIWeakReferenceUtils.h" +#include "nsLiteralString.h" +#include "nsPIDOMWindow.h" +#include "nsPropertyTable.h" +#include "nsRefPtrHashtable.h" +#include "nsString.h" +#include "nsTArray.h" +#include "nsTHashSet.h" +#include "nsTLiteralString.h" +#include "nsTObserverArray.h" +#include "nsThreadUtils.h" +#include "nsURIHashKey.h" +#include "nsViewportInfo.h" +#include "nsWeakReference.h" +#include "nsWindowSizes.h" +#include "nsXULElement.h" +#include "nscore.h" + +// XXX We need to include this here to ensure that DefaultDeleter for Servo +// types is specialized before the template is instantiated. Probably, this +// should be included at some other place already that's generated by cbindgen. +#include "mozilla/ServoBindingTypes.h" + +// windows.h #defines CreateEvent +#ifdef CreateEvent +# undef CreateEvent +#endif + +#ifdef MOZILLA_INTERNAL_API +# include "mozilla/dom/DocumentBinding.h" +#else +namespace mozilla { +namespace dom { +class ElementCreationOptionsOrString; +} // namespace dom +} // namespace mozilla +#endif // MOZILLA_INTERNAL_API + +class InfallibleAllocPolicy; +class JSObject; +class JSTracer; +class PLDHashTable; +class gfxUserFontSet; +class mozIDOMWindowProxy; +class nsCachableElementsByNameNodeList; +class nsCommandManager; +class nsContentList; +class nsCycleCollectionTraversalCallback; +class nsDOMCaretPosition; +class nsDOMNavigationTiming; +class nsDocShell; +class nsFrameLoader; +class nsFrameLoaderOwner; +class nsGenericHTMLElement; +class nsGlobalWindowInner; +class nsHTMLDocument; +class nsHtml5TreeOpExecutor; +class nsIAppWindow; +class nsIAsyncVerifyRedirectCallback; +class nsIBFCacheEntry; +class nsIContent; +class nsIContentSecurityPolicy; +class nsIContentSink; +class nsICookieJarSettings; +class nsIDOMXULCommandDispatcher; +class nsIDocShell; +class nsIDocShellTreeItem; +class nsIDocumentEncoder; +class nsIDocumentObserver; +class nsIEventTarget; +class nsIFrame; +class nsIGlobalObject; +class nsIHTMLCollection; +class nsIInputStream; +class nsILayoutHistoryState; +class nsIObjectLoadingContent; +class nsIPermissionDelegateHandler; +class nsIRadioVisitor; +class nsIRequest; +class nsIRunnable; +class nsIScriptGlobalObject; +class nsISecurityConsoleMessage; +class nsISerialEventTarget; +class nsIStructuredCloneContainer; +class nsIVariant; +class nsNodeInfoManager; +class nsPIWindowRoot; +class nsPresContext; +class nsRange; +class nsSimpleContentList; +class nsTextNode; +class nsViewManager; +class nsXULPrototypeDocument; +struct JSContext; +struct nsFont; + +namespace mozilla { +class AbstractThread; +class AttributeStyles; +class CanvasUsage; +class StyleSheet; +class EditorBase; +class EditorCommand; +class Encoding; +class ErrorResult; +class EventListenerManager; +class FullscreenExit; +class FullscreenRequest; +class HTMLEditor; +struct LangGroupFontPrefs; +class PermissionDelegateHandler; +class PresShell; +class ScrollTimelineAnimationTracker; +class ServoStyleSet; +enum class StyleOrigin : uint8_t; +class SMILAnimationController; +enum class StyleCursorKind : uint8_t; +class SVGContextPaint; +enum class ColorScheme : uint8_t; +enum class StyleRuleChangeKind : uint32_t; +struct StyleUseCounters; +template <typename> +class OwningNonNull; +struct URLExtraData; + +namespace css { +class Loader; +class ImageLoader; +class Rule; +} // namespace css + +namespace dom { +class AnonymousContent; +class Attr; +class XULBroadcastManager; +class XULPersist; +class BrowserBridgeChild; +class ChromeObserver; +class ClientInfo; +class ClientState; +class CDATASection; +class Comment; +class CSSImportRule; +class DocumentL10n; +class DocumentFragment; +class DocumentTimeline; +class DocumentType; +class DOMImplementation; +class DOMIntersectionObserver; +class DOMStringList; +class Event; +class EventListener; +struct FailedCertSecurityInfo; +class FeaturePolicy; +class FontFaceSet; +class FrameRequestCallback; +class ImageTracker; +class HighlightRegistry; +class HTMLAllCollection; +class HTMLBodyElement; +class HTMLInputElement; +class HTMLMetaElement; +class HTMLDialogElement; +class HTMLSharedElement; +class HTMLImageElement; +struct LifecycleCallbackArgs; +class Link; +class Location; +class MediaQueryList; +struct NetErrorInfo; +class NodeFilter; +class NodeInfo; +class NodeIterator; +enum class OrientationType : uint8_t; +class ProcessingInstruction; +class Promise; +class ScriptLoader; +class Selection; +class ServiceWorkerDescriptor; +class ShadowRoot; +class SVGDocument; +class SVGElement; +class SVGSVGElement; +class SVGUseElement; +class ImageDocument; +class Touch; +class TouchList; +class TreeWalker; +enum class ViewportFitType : uint8_t; +class WakeLockSentinel; +class WindowContext; +class WindowGlobalChild; +class WindowProxyHolder; +struct Wireframe; +class WorkerDocumentListener; +class XPathEvaluator; +class XPathExpression; +class XPathNSResolver; +class XPathResult; +class BrowsingContext; + +class nsUnblockOnloadEvent; + +template <typename, typename> +class CallbackObjectHolder; + +enum class CallerType : uint32_t; + +enum BFCacheStatus { + NOT_ALLOWED = 1 << 0, // Status 0 + EVENT_HANDLING_SUPPRESSED = 1 << 1, // Status 1 + SUSPENDED = 1 << 2, // Status 2 + UNLOAD_LISTENER = 1 << 3, // Status 3 + REQUEST = 1 << 4, // Status 4 + ACTIVE_GET_USER_MEDIA = 1 << 5, // Status 5 + ACTIVE_PEER_CONNECTION = 1 << 6, // Status 6 + CONTAINS_EME_CONTENT = 1 << 7, // Status 7 + CONTAINS_MSE_CONTENT = 1 << 8, // Status 8 + HAS_ACTIVE_SPEECH_SYNTHESIS = 1 << 9, // Status 9 + HAS_USED_VR = 1 << 10, // Status 10 + CONTAINS_REMOTE_SUBFRAMES = 1 << 11, // Status 11 + NOT_ONLY_TOPLEVEL_IN_BCG = 1 << 12, // Status 12 + ABOUT_PAGE = 1 << 13, // Status 13 + RESTORING = 1 << 14, // Status 14 + BEFOREUNLOAD_LISTENER = 1 << 15, // Status 15 + ACTIVE_LOCK = 1 << 16, // Status 16 + ACTIVE_WEBTRANSPORT = 1 << 17, // Status 17 +}; + +} // namespace dom +} // namespace mozilla + +namespace mozilla::net { +class ChannelEventQueue; +class EarlyHintConnectArgs; +} // namespace mozilla::net + +// Must be kept in sync with xpcom/rust/xpcom/src/interfaces/nonidl.rs +#define NS_IDOCUMENT_IID \ + { \ + 0xce1f7627, 0x7109, 0x4977, { \ + 0xba, 0x77, 0x49, 0x0f, 0xfd, 0xe0, 0x7a, 0xaa \ + } \ + } + +namespace mozilla::dom { + +class Document; +class DOMStyleSheetSetList; +class ResizeObserver; +class ResizeObserverController; +class PostMessageEvent; + +#define DEPRECATED_OPERATION(_op) e##_op, +enum class DeprecatedOperations : uint16_t { +#include "nsDeprecatedOperationList.h" + eDeprecatedOperationCount +}; +#undef DEPRECATED_OPERATION + +class ExternalResourceMap { + using SubDocEnumFunc = FunctionRef<CallState(Document&)>; + + public: + /** + * A class that represents an external resource load that has begun but + * doesn't have a document yet. Observers can be registered on this object, + * and will be notified after the document is created. Observers registered + * after the document has been created will NOT be notified. When observers + * are notified, the subject will be the newly-created document, the topic + * will be "external-resource-document-created", and the data will be null. + * If document creation fails for some reason, observers will still be + * notified, with a null document pointer. + */ + class ExternalResourceLoad : public nsISupports { + public: + virtual ~ExternalResourceLoad() = default; + + void AddObserver(nsIObserver* aObserver) { + MOZ_ASSERT(aObserver, "Must have observer"); + mObservers.AppendElement(aObserver); + } + + const nsTArray<nsCOMPtr<nsIObserver>>& Observers() { return mObservers; } + + protected: + AutoTArray<nsCOMPtr<nsIObserver>, 8> mObservers; + }; + + ExternalResourceMap(); + + /** + * Request an external resource document. This does exactly what + * Document::RequestExternalResource is documented to do. + */ + Document* RequestResource(nsIURI* aURI, nsIReferrerInfo* aReferrerInfo, + nsINode* aRequestingNode, + Document* aDisplayDocument, + ExternalResourceLoad** aPendingLoad); + + /** + * Enumerate the resource documents. See + * Document::EnumerateExternalResources. + */ + void EnumerateResources(SubDocEnumFunc aCallback); + + /** + * Traverse ourselves for cycle-collection + */ + void Traverse(nsCycleCollectionTraversalCallback* aCallback) const; + + /** + * Shut ourselves down (used for cycle-collection unlink), as well + * as for document destruction. + */ + void Shutdown() { + mPendingLoads.Clear(); + mMap.Clear(); + mHaveShutDown = true; + } + + bool HaveShutDown() const { return mHaveShutDown; } + + // Needs to be public so we can traverse them sanely + struct ExternalResource { + ~ExternalResource(); + RefPtr<Document> mDocument; + nsCOMPtr<nsIDocumentViewer> mViewer; + nsCOMPtr<nsILoadGroup> mLoadGroup; + }; + + // Hide all our viewers + void HideViewers(); + + // Show all our viewers + void ShowViewers(); + + protected: + class PendingLoad : public ExternalResourceLoad, public nsIStreamListener { + ~PendingLoad() = default; + + public: + explicit PendingLoad(Document* aDisplayDocument) + : mDisplayDocument(aDisplayDocument) {} + + NS_DECL_ISUPPORTS + NS_DECL_NSISTREAMLISTENER + NS_DECL_NSIREQUESTOBSERVER + + /** + * Start aURI loading. This will perform the necessary security checks and + * so forth. + */ + nsresult StartLoad(nsIURI* aURI, nsIReferrerInfo* aReferrerInfo, + nsINode* aRequestingNode); + /** + * Set up an nsIDocumentViewer based on aRequest. This is guaranteed to + * put null in *aViewer and *aLoadGroup on all failures. + */ + nsresult SetupViewer(nsIRequest* aRequest, nsIDocumentViewer** aViewer, + nsILoadGroup** aLoadGroup); + + private: + RefPtr<Document> mDisplayDocument; + nsCOMPtr<nsIStreamListener> mTargetListener; + nsCOMPtr<nsIURI> mURI; + }; + friend class PendingLoad; + + class LoadgroupCallbacks final : public nsIInterfaceRequestor { + ~LoadgroupCallbacks() = default; + + public: + explicit LoadgroupCallbacks(nsIInterfaceRequestor* aOtherCallbacks) + : mCallbacks(aOtherCallbacks) {} + NS_DECL_ISUPPORTS + NS_DECL_NSIINTERFACEREQUESTOR + private: + // The only reason it's safe to hold a strong ref here without leaking is + // that the notificationCallbacks on a loadgroup aren't the docshell itself + // but a shim that holds a weak reference to the docshell. + nsCOMPtr<nsIInterfaceRequestor> mCallbacks; + + // Use shims for interfaces that docshell implements directly so that we + // don't hand out references to the docshell. The shims should all allow + // getInterface back on us, but other than that each one should only + // implement one interface. + + // XXXbz I wish we could just derive the _allcaps thing from _i +#define DECL_SHIM(_i, _allcaps) \ + class _i##Shim final : public nsIInterfaceRequestor, public _i { \ + ~_i##Shim() {} \ + \ + public: \ + _i##Shim(nsIInterfaceRequestor* aIfreq, _i* aRealPtr) \ + : mIfReq(aIfreq), mRealPtr(aRealPtr) { \ + NS_ASSERTION(mIfReq, "Expected non-null here"); \ + NS_ASSERTION(mRealPtr, "Expected non-null here"); \ + } \ + NS_DECL_ISUPPORTS \ + NS_FORWARD_NSIINTERFACEREQUESTOR(mIfReq->) \ + NS_FORWARD_##_allcaps(mRealPtr->) private \ + : nsCOMPtr<nsIInterfaceRequestor> mIfReq; \ + nsCOMPtr<_i> mRealPtr; \ + }; + + DECL_SHIM(nsILoadContext, NSILOADCONTEXT) + DECL_SHIM(nsIProgressEventSink, NSIPROGRESSEVENTSINK) + DECL_SHIM(nsIChannelEventSink, NSICHANNELEVENTSINK) +#undef DECL_SHIM + }; + + /** + * Add an ExternalResource for aURI. aViewer and aLoadGroup might be null + * when this is called if the URI didn't result in an XML document. This + * function makes sure to remove the pending load for aURI, if any, from our + * hashtable, and to notify its observers, if any. + */ + nsresult AddExternalResource(nsIURI* aURI, nsIDocumentViewer* aViewer, + nsILoadGroup* aLoadGroup, + Document* aDisplayDocument); + + nsClassHashtable<nsURIHashKey, ExternalResource> mMap; + nsRefPtrHashtable<nsURIHashKey, PendingLoad> mPendingLoads; + bool mHaveShutDown; +}; + +// The current status for a preload. +enum class SheetPreloadStatus : uint8_t { + // There's no need to preload anything, the sheet is already in-memory. + AlreadyComplete, + // The load is in-progress. There's no guarantee that a load was started, it + // could be coalesced with other redundant loads. + InProgress, + // Something went wrong, and we errored out. + Errored, +}; + +//---------------------------------------------------------------------- + +// Document interface. This is implemented by all document objects in +// Gecko. +class Document : public nsINode, + public DocumentOrShadowRoot, + public nsSupportsWeakReference, + public nsIScriptObjectPrincipal, + public SupportsWeakPtr { + friend class DocumentOrShadowRoot; + + protected: + explicit Document(const char* aContentType); + virtual ~Document(); + + Document(const Document&) = delete; + Document& operator=(const Document&) = delete; + + public: + using ExternalResourceLoad = dom::ExternalResourceMap::ExternalResourceLoad; + using ReferrerPolicyEnum = dom::ReferrerPolicy; + using AdoptedStyleSheetCloneCache = + nsRefPtrHashtable<nsPtrHashKey<const StyleSheet>, StyleSheet>; + + // nsINode overrides the new operator for DOM Arena allocation. + // to use the default one, we need to bring it back again + void* operator new(size_t aSize) { return ::operator new(aSize); } + + /** + * Called when XPCOM shutdown. + */ + static void Shutdown(); + + NS_DECLARE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_IID) + + NS_DECL_ISUPPORTS_INHERITED + NS_IMETHOD_(void) DeleteCycleCollectable() override; + + NS_DECL_ADDSIZEOFEXCLUDINGTHIS + + NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_AMBIGUOUS(Document, + nsINode) + +#define NS_DOCUMENT_NOTIFY_OBSERVERS(func_, params_) \ + do { \ + for (RefPtr obs : mObservers.ForwardRange()) { \ + if (obs->IsCallbackEnabled(nsIMutationObserver::k##func_)) { \ + obs->func_ params_; \ + } \ + } \ + /* FIXME(emilio): Apparently we can keep observing from the BFCache? That \ + looks bogus. */ \ + if (PresShell* presShell = GetObservingPresShell()) { \ + presShell->func_ params_; \ + } \ + } while (0) + + nsIPrincipal* EffectiveCookiePrincipal() const; + + nsIPrincipal* EffectiveStoragePrincipal() const; + + // nsIScriptObjectPrincipal + nsIPrincipal* GetPrincipal() final { return NodePrincipal(); } + + nsIPrincipal* GetEffectiveCookiePrincipal() final { + return EffectiveCookiePrincipal(); + } + + nsIPrincipal* GetEffectiveStoragePrincipal() final { + return EffectiveStoragePrincipal(); + } + + // You should probably not be using this function, since it performs no checks + // to ensure that the partitioned principal should really be used here. It is + // only designed to be used in very specific circumstances, such as when + // inheriting the document/storage principal. + nsIPrincipal* PartitionedPrincipal() final { return mPartitionedPrincipal; } + + // Gets the appropriate principal to check the URI against a blocklist / + // allowlist. + nsIPrincipal* GetPrincipalForPrefBasedHacks() const; + + void ClearActiveCookieAndStoragePrincipals() { + mActiveStoragePrincipal = nullptr; + mActiveCookiePrincipal = nullptr; + } + + // EventTarget + void GetEventTargetParent(EventChainPreVisitor& aVisitor) override; + EventListenerManager* GetOrCreateListenerManager() override; + EventListenerManager* GetExistingListenerManager() const override; + + // This helper class must be set when we dispatch beforeunload and unload + // events in order to avoid unterminate sync XHRs. + class MOZ_RAII PageUnloadingEventTimeStamp { + RefPtr<Document> mDocument; + bool mSet; + + public: + explicit PageUnloadingEventTimeStamp(Document* aDocument) + : mDocument(aDocument), mSet(false) { + MOZ_ASSERT(aDocument); + if (mDocument->mPageUnloadingEventTimeStamp.IsNull()) { + mDocument->SetPageUnloadingEventTimeStamp(); + mSet = true; + } + } + + ~PageUnloadingEventTimeStamp() { + if (mSet) { + mDocument->CleanUnloadEventsTimeStamp(); + } + } + }; + + /** + * Let the document know that we're starting to load data into it. + * @param aCommand The parser command. Must not be null. + * XXXbz It's odd to have that here. + * @param aChannel The channel the data will come from. The channel must be + * able to report its Content-Type. + * @param aLoadGroup The loadgroup this document should use from now on. + * Note that the document might not be the only thing using + * this loadgroup. + * @param aContainer The container this document is in. This may be null. + * XXXbz maybe we should make it more explicit (eg make the + * container an nsIWebNavigation or nsIDocShell or + * something)? + * @param [out] aDocListener the listener to pump data from the channel into. + * Generally this will be the parser this document + * sets up, or some sort of data-handler for media + * documents. + * @param aReset whether the document should call Reset() on itself. If this + * is false, the document will NOT set its principal to the + * channel's owner, will not clear any event listeners that are + * already set on it, etc. + * + * Once this has been called, the document will return false for + * MayStartLayout() until SetMayStartLayout(true) is called on it. Making + * sure this happens is the responsibility of the caller of + * StartDocumentLoad(). + * + * This function has an implementation, and does some setup, but does NOT set + * *aDocListener; this is the job of subclasses. + */ + virtual nsresult StartDocumentLoad(const char* aCommand, nsIChannel* aChannel, + nsILoadGroup* aLoadGroup, + nsISupports* aContainer, + nsIStreamListener** aDocListener, + bool aReset) = 0; + void StopDocumentLoad(); + + virtual void SetSuppressParserErrorElement(bool aSuppress) {} + virtual bool SuppressParserErrorElement() { return false; } + + virtual void SetSuppressParserErrorConsoleMessages(bool aSuppress) {} + virtual bool SuppressParserErrorConsoleMessages() { return false; } + + // nsINode + void InsertChildBefore(nsIContent* aKid, nsIContent* aBeforeThis, + bool aNotify, ErrorResult& aRv) override; + void RemoveChildNode(nsIContent* aKid, bool aNotify) final; + nsresult Clone(dom::NodeInfo* aNodeInfo, nsINode** aResult) const override { + return NS_ERROR_NOT_IMPLEMENTED; + } + nsresult CloneDocHelper(Document* clone) const; + + Document* GetLatestStaticClone() const { return mLatestStaticClone; } + + /** + * Signal that the document title may have changed + * (see Document::GetTitle). + * @param aBoundTitleElement true if an HTML or SVG <title> element + * has just been bound to the document. + */ + virtual void NotifyPossibleTitleChange(bool aBoundTitleElement); + + /** + * Return the URI for the document. May return null. If it ever stops being + * able to return null, we can make sure nsINode::GetBaseURI/GetBaseURIObject + * also never return null. + * + * The value returned corresponds to the "document's address" in + * HTML5. As such, it may change over the lifetime of the document, for + * instance as a result of the user navigating to a fragment identifier on + * the page, or as a result to a call to pushState() or replaceState(). + * + * https://html.spec.whatwg.org/multipage/dom.html#the-document%27s-address + */ + nsIURI* GetDocumentURI() const { return mDocumentURI; } + + /** + * Return the original URI of the document. This is the same as the + * document's URI unless that has changed from its original value (for + * example, due to history.pushState() or replaceState() being invoked on the + * document). + * + * This method corresponds to the "creation URL" in HTML5 and, once set, + * doesn't change over the lifetime of the document. + * + * https://html.spec.whatwg.org/multipage/webappapis.html#creation-url + */ + nsIURI* GetOriginalURI() const { return mOriginalURI; } + + /** + * Return the base domain of the document. This has been computed using + * mozIThirdPartyUtil::GetBaseDomain() and can be used for third-party + * checks. When the URI of the document changes, this value is recomputed. + */ + nsCString GetBaseDomain() const { return mBaseDomain; } + + /** + * Set the URI for the document. This also sets the document's original URI, + * if it's null. + */ + void SetDocumentURI(nsIURI* aURI); + + /** + * Set the URI for the document loaded via XHR, when accessed from + * chrome privileged script. + */ + void SetChromeXHRDocURI(nsIURI* aURI) { mChromeXHRDocURI = aURI; } + + /** + * Set the base URI for the document loaded via XHR, when accessed from + * chrome privileged script. + */ + void SetChromeXHRDocBaseURI(nsIURI* aURI) { mChromeXHRDocBaseURI = aURI; } + + /** + * The CSP in general is stored in the ClientInfo, but we also cache + * the CSP on the document so subresources loaded within a document + * can query that cached CSP instead of having to deserialize the CSP + * from the Client. + * + * Please note that at the time of CSP parsing the Client is not + * available yet, hence we sync CSP of document and Client when the + * Client becomes available within nsGlobalWindowInner::EnsureClientSource(). + */ + nsIContentSecurityPolicy* GetCsp() const; + void SetCsp(nsIContentSecurityPolicy* aCSP); + + nsIContentSecurityPolicy* GetPreloadCsp() const; + void SetPreloadCsp(nsIContentSecurityPolicy* aPreloadCSP); + + void GetCspJSON(nsString& aJSON); + + /** + * Set referrer policy and upgrade-insecure-requests flags + */ + void ApplySettingsFromCSP(bool aSpeculative); + + already_AddRefed<nsIParser> CreatorParserOrNull() { + nsCOMPtr<nsIParser> parser = mParser; + return parser.forget(); + } + + /** + * ReferrerInfo getter for Document.webidl. + */ + nsIReferrerInfo* ReferrerInfo() const { return GetReferrerInfo(); } + + nsIReferrerInfo* GetReferrerInfo() const { return mReferrerInfo; } + + nsIReferrerInfo* GetPreloadReferrerInfo() const { + return mPreloadReferrerInfo; + } + /** + * Return the referrer policy of the document. Return "default" if there's no + * valid meta referrer tag found in the document. + * Referrer policy should be inherited from parent if the iframe is srcdoc + */ + ReferrerPolicyEnum GetReferrerPolicy() const; + + /** + * GetReferrerPolicy() for Document.webidl. + */ + ReferrerPolicyEnum ReferrerPolicy() const { return GetReferrerPolicy(); } + + /** + * If true, this flag indicates that all mixed content subresource + * loads for this document (and also embeded browsing contexts) will + * be blocked. + */ + bool GetBlockAllMixedContent(bool aPreload) const { + if (aPreload) { + return mBlockAllMixedContentPreloads; + } + return mBlockAllMixedContent; + } + + /** + * If true, this flag indicates that all subresource loads for this + * document need to be upgraded from http to https. + * This flag becomes true if the CSP of the document itself, or any + * of the document's ancestors up to the toplevel document makes use + * of the CSP directive 'upgrade-insecure-requests'. + */ + bool GetUpgradeInsecureRequests(bool aPreload) const { + if (aPreload) { + return mUpgradeInsecurePreloads; + } + return mUpgradeInsecureRequests; + } + + void SetReferrerInfo(nsIReferrerInfo*); + + /* + * Referrer policy from <meta name="referrer" content=`policy`> + * will have higher priority than referrer policy from Referrer-Policy + * header. So override the old ReferrerInfo if we get one from meta + */ + void UpdateReferrerInfoFromMeta(const nsAString& aMetaReferrer, + bool aPreload); + + /** + * Set the principals responsible for this document. Chances are, you do not + * want to be using this. + */ + void SetPrincipals(nsIPrincipal* aPrincipal, + nsIPrincipal* aPartitionedPrincipal); + + /** + * Returns true if exempt from HTTPS-Only Mode upgrade. + */ + uint32_t HttpsOnlyStatus() const { return mHttpsOnlyStatus; } + + /** + * Return the LoadGroup for the document. May return null. + */ + already_AddRefed<nsILoadGroup> GetDocumentLoadGroup() const { + nsCOMPtr<nsILoadGroup> group = do_QueryReferent(mDocumentLoadGroup); + return group.forget(); + } + + /** + * Return the fallback base URL for this document, as defined in the HTML + * specification. Note that this can return null if there is no document URI. + * + * XXXbz: This doesn't implement the bits for about:blank yet. + */ + nsIURI* GetFallbackBaseURI() const { + if (mIsSrcdocDocument && mParentDocument) { + return mParentDocument->GetDocBaseURI(); + } + return mDocumentURI; + } + + /** + * Return the referrer from document URI as defined in the Referrer Policy + * specification. + * https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer + * While document is an iframe srcdoc document, let document be document's + * browsing context's browsing context container's node document. + * Then referrer should be document's URL + */ + + nsIURI* GetDocumentURIAsReferrer() const { + if (mIsSrcdocDocument && mParentDocument) { + return mParentDocument->GetDocumentURIAsReferrer(); + } + return mDocumentURI; + } + + /** + * Return the base URI for relative URIs in the document (the document uri + * unless it's overridden by SetBaseURI, HTML <base> tags, etc.). The + * returned URI could be null if there is no document URI. If the document is + * a srcdoc document and has no explicit base URL, return the parent + * document's base URL. + */ + nsIURI* GetDocBaseURI() const { + if (mDocumentBaseURI) { + return mDocumentBaseURI; + } + return GetFallbackBaseURI(); + } + + nsIURI* GetBaseURI(bool aTryUseXHRDocBaseURI = false) const final; + + void SetBaseURI(nsIURI* aURI); + + /** + * Resolves a URI based on the document's base URI. + */ + Result<OwningNonNull<nsIURI>, nsresult> ResolveWithBaseURI( + const nsAString& aURI); + + /** + * Return the URL data which style system needs for resolving url value. + * This method attempts to use the cached object in mCachedURLData, but + * if the base URI, document URI, or principal has changed since last + * call to this function, or the function is called the first time for + * the document, a new one is created. + */ + URLExtraData* DefaultStyleAttrURLData(); + nsIReferrerInfo* ReferrerInfoForInternalCSSAndSVGResources(); + + /** + * Get/Set the base target of a link in a document. + */ + void GetBaseTarget(nsAString& aBaseTarget) const { + aBaseTarget = mBaseTarget; + } + + void SetBaseTarget(const nsString& aBaseTarget) { mBaseTarget = aBaseTarget; } + + /** + * Return a standard name for the document's character set. + */ + NotNull<const Encoding*> GetDocumentCharacterSet() const { + return mCharacterSet; + } + + /** + * Set the document's character encoding. + */ + void SetDocumentCharacterSet(NotNull<const Encoding*> aEncoding); + + int32_t GetDocumentCharacterSetSource() const { return mCharacterSetSource; } + + // This method MUST be called before SetDocumentCharacterSet if + // you're planning to call both. + void SetDocumentCharacterSetSource(int32_t aCharsetSource) { + mCharacterSetSource = aCharsetSource; + } + + /** + * Get the Content-Type of this document. + */ + void GetContentType(nsAString& aContentType); + + /** + * Set the Content-Type of this document. + */ + void SetContentType(const nsACString& aContentType); + + /** + * Return the language of this document, or null if not set. + */ + nsAtom* GetContentLanguage() const { return mContentLanguage.get(); } + + void GetContentLanguageForBindings(DOMString&) const; + + // The states BidiEnabled and MathMLEnabled should persist across multiple + // views (screen, print) of the same document. + + /** + * Check if the document contains bidi data. + * If so, we have to apply the Unicode Bidi Algorithm. + */ + bool GetBidiEnabled() const { return mBidiEnabled; } + + /** + * Indicate the document contains bidi data. + * Currently, we cannot disable bidi, because once bidi is enabled, + * it affects a frame model irreversibly, and plays even though + * the document no longer contains bidi data. + */ + void SetBidiEnabled() { mBidiEnabled = true; } + + void SetMathMLEnabled() { mMathMLEnabled = true; } + + /** + * Ask this document whether it's the initial document in its window. + */ + bool IsInitialDocument() const { return mIsInitialDocumentInWindow; } + + /** + * Ask this document whether it has ever been a initial document in its + * window. + */ + bool IsEverInitialDocument() const { return mIsEverInitialDocumentInWindow; } + + /** + * Tell this document that it's the initial document in its window. See + * comments on mIsInitialDocumentInWindow for when this should be called. + */ + void SetIsInitialDocument(bool aIsInitialDocument); + + void SetLoadedAsData(bool aLoadedAsData, bool aConsiderForMemoryReporting); + + TimeStamp GetLoadingOrRestoredFromBFCacheTimeStamp() const { + return mLoadingOrRestoredFromBFCacheTimeStamp; + } + void SetLoadingOrRestoredFromBFCacheTimeStampToNow() { + mLoadingOrRestoredFromBFCacheTimeStamp = TimeStamp::Now(); + } + + /** + * Normally we assert if a runnable labeled with one DocGroup touches data + * from another DocGroup. Calling IgnoreDocGroupMismatches() on a document + * means that we can touch that document from any DocGroup without asserting. + */ + void IgnoreDocGroupMismatches() { mIgnoreDocGroupMismatches = true; } + + /** + * Get the bidi options for this document. + * @see nsBidiUtils.h + */ + uint32_t GetBidiOptions() const { return mBidiOptions; } + + /** + * Set the bidi options for this document. This just sets the bits; + * callers are expected to take action as needed if they want this + * change to actually change anything immediately. + * @see nsBidiUtils.h + */ + void SetBidiOptions(uint32_t aBidiOptions) { mBidiOptions = aBidiOptions; } + + /** + * Returns true if the document holds a CSP + * delivered through an HTTP Header. + */ + bool GetHasCSPDeliveredThroughHeader() { + return mHasCSPDeliveredThroughHeader; + } + + /** + * Return a promise which resolves to the content blocking events. + */ + using GetContentBlockingEventsPromise = MozPromise<uint32_t, bool, true>; + [[nodiscard]] RefPtr<GetContentBlockingEventsPromise> + GetContentBlockingEvents(); + + /** + * Get the sandbox flags for this document. + * @see nsSandboxFlags.h for the possible flags + */ + uint32_t GetSandboxFlags() const { return mSandboxFlags; } + + Maybe<nsILoadInfo::CrossOriginEmbedderPolicy> GetEmbedderPolicy() const { + return mEmbedderPolicy; + } + + void SetEmbedderPolicy( + const Maybe<nsILoadInfo::CrossOriginEmbedderPolicy>& aCOEP) { + mEmbedderPolicy = aCOEP; + } + + /** + * Get string representation of sandbox flags (null if no flags are set) + */ + void GetSandboxFlagsAsString(nsAString& aFlags); + + /** + * Set the sandbox flags for this document. + * @see nsSandboxFlags.h for the possible flags + */ + void SetSandboxFlags(uint32_t sandboxFlags) { mSandboxFlags = sandboxFlags; } + + /** + * Called when the document was decoded as UTF-8 and decoder encountered no + * errors. + */ + void EnableEncodingMenu() { mEncodingMenuDisabled = false; } + + /** + * Called to disable client access to cookies through the document.cookie API + * from user JavaScript code. + */ + void DisableCookieAccess() { mDisableCookieAccess = true; } + + void SetLinkHandlingEnabled(bool aValue) { mLinksEnabled = aValue; } + bool LinkHandlingEnabled() { return mLinksEnabled; } + + /** + * Set compatibility mode for this document + */ + void SetCompatibilityMode(nsCompatibility aMode); + + /** + * Called to disable client access to document.write() API from user + * JavaScript code. + */ + void SetDocWriteDisabled(bool aDisabled) { mDisableDocWrite = aDisabled; } + + /** + * Whether a document.write() call is in progress. + */ + bool IsWriting() const { return mWriteLevel != uint32_t(0); } + + /** + * Access HTTP header data (this may also get set from other + * sources, like HTML META tags). + */ + void GetHeaderData(nsAtom* aHeaderField, nsAString& aData) const; + void SetHeaderData(nsAtom* aheaderField, const nsAString& aData); + + /** + * Set Early Hint data, moves the arrays into the function, leaving the + * passed variables empty + */ + void SetEarlyHints(nsTArray<net::EarlyHintConnectArgs>&& aEarlyHints); + const nsTArray<net::EarlyHintConnectArgs>& GetEarlyHints() const { + return mEarlyHints; + } + + /** + * Create a new presentation shell that will use aContext for its + * presentation context (presentation contexts <b>must not</b> be + * shared among multiple presentation shells). The caller of this + * method is responsible for calling BeginObservingDocument() on the + * presshell if the presshell should observe document mutations. + */ + MOZ_CAN_RUN_SCRIPT already_AddRefed<PresShell> CreatePresShell( + nsPresContext* aContext, nsViewManager* aViewManager); + void DeletePresShell(); + + PresShell* GetPresShell() const { + return GetBFCacheEntry() ? nullptr : mPresShell; + } + + inline PresShell* GetObservingPresShell() const; + + // Return whether the presshell for this document is safe to flush. + bool IsSafeToFlush() const; + + inline nsPresContext* GetPresContext() const; + + bool HasShellOrBFCacheEntry() const { return mPresShell || mBFCacheEntry; } + + // Instead using this method, what you probably want is + // RemoveFromBFCacheSync() as we do in MessagePort and BroadcastChannel. + void DisallowBFCaching(uint32_t aStatus = BFCacheStatus::NOT_ALLOWED); + + bool IsBFCachingAllowed() const { return !mBFCacheDisallowed; } + + // Accepts null to clear the BFCache entry too. + void SetBFCacheEntry(nsIBFCacheEntry* aEntry); + + nsIBFCacheEntry* GetBFCacheEntry() const { return mBFCacheEntry; } + + // Removes this document from the BFCache, if it is cached, and returns + // true if it was. + bool RemoveFromBFCacheSync(); + + /** + * Return the parent document of this document. Will return null + * unless this document is within a compound document and has a + * parent. Note that this parent chain may cross chrome boundaries. + */ + Document* GetInProcessParentDocument() const { return mParentDocument; } + + /** + * Set the parent document of this document. + */ + void SetParentDocument(Document* aParent) { + mParentDocument = aParent; + if (aParent) { + RecomputeResistFingerprinting(); + mIgnoreDocGroupMismatches = aParent->mIgnoreDocGroupMismatches; + } + } + + void SetCurrentContextPaint(const SVGContextPaint* aContextPaint) { + mCurrentContextPaint = aContextPaint; + } + + const SVGContextPaint* GetCurrentContextPaint() const { + return mCurrentContextPaint; + } + + /** + * Set the sub document for aContent to aSubDoc. + */ + nsresult SetSubDocumentFor(Element* aContent, Document* aSubDoc); + + /** + * Get the sub document for aContent + */ + Document* GetSubDocumentFor(nsIContent* aContent) const; + + /** + * Get the content node for which this document is a sub document. + */ + Element* GetEmbedderElement() const; + + /** + * Return the doctype for this document. + */ + DocumentType* GetDoctype() const; + + /** + * Return the root element for this document. + */ + Element* GetRootElement() const; + + Selection* GetSelection(ErrorResult& aRv); + + void MakeBrowsingContextNonSynthetic(); + nsresult HasStorageAccessSync(bool& aHasStorageAccess); + already_AddRefed<Promise> HasStorageAccess(ErrorResult& aRv); + + StorageAccessAPIHelper::PerformPermissionGrant CreatePermissionGrantPromise( + nsPIDOMWindowInner* aInnerWindow, nsIPrincipal* aPrincipal, + bool aHasUserInteraction, bool aRequireUserInteraction, + const Maybe<nsCString>& aTopLevelBaseDomain, bool aFrameOnly); + + already_AddRefed<Promise> RequestStorageAccess(ErrorResult& aRv); + + already_AddRefed<Promise> RequestStorageAccessForOrigin( + const nsAString& aThirdPartyOrigin, const bool aRequireUserInteraction, + ErrorResult& aRv); + + already_AddRefed<Promise> RequestStorageAccessUnderSite( + const nsAString& aSerializedSite, ErrorResult& aRv); + already_AddRefed<Promise> CompleteStorageAccessRequestFromSite( + const nsAString& aSerializedOrigin, ErrorResult& aRv); + + bool UseRegularPrincipal() const; + + /** + * Gets the event target to dispatch key events to if there is no focused + * content in the document. + */ + virtual Element* GetUnfocusedKeyEventTarget(); + + /** + * Retrieve information about the viewport as a data structure. + * This will return information in the viewport META data section + * of the document. This can be used in lieu of ProcessViewportInfo(), + * which places the viewport information in the document header instead + * of returning it directly. + * + * @param aDisplaySize size of the on-screen display area for this + * document, in device pixels. + * + * NOTE: If the site is optimized for mobile (via the doctype), this + * will return viewport information that specifies default information. + */ + nsViewportInfo GetViewportInfo(const ScreenIntSize& aDisplaySize); + + void SetMetaViewportData(UniquePtr<ViewportMetaData> aData); + + // Returns a ViewportMetaData for this document. + ViewportMetaData GetViewportMetaData() const; + + /** + * True iff this doc will ignore manual character encoding overrides. + */ + virtual bool WillIgnoreCharsetOverride() { return true; } + + /** + * Return whether the document was created by a srcdoc iframe. + */ + bool IsSrcdocDocument() const { return mIsSrcdocDocument; } + + /** + * Sets whether the document was created by a srcdoc iframe. + */ + void SetIsSrcdocDocument(bool aIsSrcdocDocument) { + mIsSrcdocDocument = aIsSrcdocDocument; + } + + /* + * Gets the srcdoc string from within the channel (assuming both exist). + * Returns a void string if this isn't a srcdoc document or if + * the channel has not been set. + */ + nsresult GetSrcdocData(nsAString& aSrcdocData); + + already_AddRefed<AnonymousContent> InsertAnonymousContent(bool aForce, + ErrorResult&); + void RemoveAnonymousContent(AnonymousContent&); + /** + * If aNode is a descendant of anonymous content inserted by + * InsertAnonymousContent, this method returns the root element of the + * inserted anonymous content (in other words, the clone of the aElement + * that was passed to InsertAnonymousContent). + */ + Element* GetAnonRootIfInAnonymousContentContainer(nsINode* aNode) const; + nsTArray<RefPtr<AnonymousContent>>& GetAnonymousContents() { + return mAnonymousContents; + } + + TimeStamp GetPageUnloadingEventTimeStamp() const { + if (!mParentDocument) { + return mPageUnloadingEventTimeStamp; + } + + TimeStamp parentTimeStamp( + mParentDocument->GetPageUnloadingEventTimeStamp()); + if (parentTimeStamp.IsNull()) { + return mPageUnloadingEventTimeStamp; + } + + if (!mPageUnloadingEventTimeStamp || + parentTimeStamp < mPageUnloadingEventTimeStamp) { + return parentTimeStamp; + } + + return mPageUnloadingEventTimeStamp; + } + + void NotifyLayerManagerRecreated(); + + // Add an element to the list of elements that need their mapped attributes + // resolved to a declaration block. + // + // These are weak pointers, manually unschedule them when an element is + // removed from the tree. + void ScheduleForPresAttrEvaluation(Element* aElement); + + // Un-schedule an element scheduled by ScheduleForPresAttrEvaluation, + // generally when it's unbound from the tree. + void UnscheduleForPresAttrEvaluation(Element* aElement); + + // Resolve all presentational attributes scheduled in + // ScheduleForPresAttrEvaluation + void ResolveScheduledPresAttrs() { + if (mLazyPresElements.IsEmpty()) { + return; + } + DoResolveScheduledPresAttrs(); + } + + Maybe<ClientInfo> GetClientInfo() const; + Maybe<ClientState> GetClientState() const; + Maybe<ServiceWorkerDescriptor> GetController() const; + + // Given a node, get a weak reference to it and append that reference to + // mBlockedNodesByClassifier. Can be used later on to look up a node in it. + // (e.g., by the UI) + // / + void AddBlockedNodeByClassifier(nsINode* aNode) { + if (aNode) { + mBlockedNodesByClassifier.AppendElement(do_GetWeakReference(aNode)); + } + } + + // Returns the size of the mBlockedNodesByClassifier array. + // + // This array contains nodes that have been blocked to prevent user tracking, + // fingerprinting, cryptomining, etc. They most likely have had their + // nsIChannel canceled by the URL classifier (Safebrowsing). + // + // A script can subsequently use GetBlockedNodesByClassifier() + // to get a list of references to these nodes. + // + // Note: + // This expresses how many tracking nodes have been blocked for this document + // since its beginning, not how many of them are still around in the DOM tree. + // Weak references to blocked nodes are added in the mBlockedNodesByClassifier + // array but they are not removed when those nodes are removed from the tree + // or even garbage collected. + size_t BlockedNodeByClassifierCount() const { + return mBlockedNodesByClassifier.Length(); + } + + // Returns strong references to mBlockedNodesByClassifier. (Document.h) + // This array contains nodes that have been blocked to prevent + // user tracking. They most likely have had their nsIChannel + // canceled by the URL classifier (Safebrowsing). + already_AddRefed<nsSimpleContentList> BlockedNodesByClassifier() const; + + // Helper method that returns true if the document has storage-access sandbox + // flag. + bool StorageAccessSandboxed() const; + + // Helper method that returns true if storage access API is enabled and + // the passed flag has storage-access sandbox flag. + static bool StorageAccessSandboxed(uint32_t aSandboxFlags); + + // Returns the cookie jar settings for this and sub contexts. + nsICookieJarSettings* CookieJarSettings(); + + // Returns whether this document is using unpartitioned cookies + bool UsingStorageAccess(); + + // Returns whether the storage access permission of the document is granted by + // the allow list. + bool HasStorageAccessPermissionGrantedByAllowList(); + + // Increments the document generation. + inline void Changed() { ++mGeneration; } + + // Returns the current generation. + inline int32_t GetGeneration() const { return mGeneration; } + + // Adds cached sizes values to aSizes if there's any + // cached value and if the document generation hasn't + // changed since the cache was created. + // Returns true if sizes were added. + bool GetCachedSizes(nsTabSizes* aSizes); + + // Sets the cache sizes for the current generation. + void SetCachedSizes(nsTabSizes* aSizes); + + /** + * Should be called when an element's editable changes as a result of + * changing its contentEditable attribute/property. + * + * The change should be +1 if the contentEditable attribute/property was + * changed to true, -1 if it was changed to false. + */ + void ChangeContentEditableCount(Element*, int32_t aChange); + MOZ_CAN_RUN_SCRIPT void DeferredContentEditableCountChange(Element*); + + enum class EditingState : int8_t { + eTearingDown = -2, + eSettingUp = -1, + eOff = 0, + eDesignMode, + eContentEditable + }; + + /** + * Returns the editing state of the document (not editable, contentEditable or + * designMode). + */ + EditingState GetEditingState() const { return mEditingState; } + + /** + * Returns whether the document is editable. + */ + bool IsEditingOn() const { + return GetEditingState() == EditingState::eDesignMode || + GetEditingState() == EditingState::eContentEditable; + } + + class MOZ_STACK_CLASS nsAutoEditingState { + public: + nsAutoEditingState(Document* aDoc, EditingState aState) + : mDoc(aDoc), mSavedState(aDoc->mEditingState) { + aDoc->mEditingState = aState; + } + ~nsAutoEditingState() { mDoc->mEditingState = mSavedState; } + + private: + RefPtr<Document> mDoc; + EditingState mSavedState; + }; + friend class nsAutoEditingState; + + /** + * Set the editing state of the document. Don't use this if you want + * to enable/disable editing, call EditingStateChanged() or + * SetDesignMode(). + */ + void SetEditingState(EditingState aState) { mEditingState = aState; } + + /** + * Called when this Document's editor is destroyed. + */ + void TearingDownEditor(); + + void SetKeyPressEventModel(uint16_t aKeyPressEventModel); + + // Gets the next form number. + // + // Used by nsContentUtils::GenerateStateKey to get a unique number for each + // parser inserted form element. + int32_t GetNextFormNumber() { return mNextFormNumber++; } + + // Gets the next form control number. + // + // Used by nsContentUtils::GenerateStateKey to get a unique number for each + // parser inserted form control element. + int32_t GetNextControlNumber() { return mNextControlNumber++; } + + PreloadService& Preloads() { return mPreloadService; } + + bool HasThirdPartyChannel(); + + bool ShouldIncludeInTelemetry() const; + + void AddMediaElementWithMSE(); + void RemoveMediaElementWithMSE(); + + void DoNotifyPossibleTitleChange(); + + void InitFeaturePolicy(); + nsresult InitFeaturePolicy(nsIChannel* aChannel); + + void EnsureNotEnteringAndExitFullscreen(); + + protected: + friend class nsUnblockOnloadEvent; + + nsresult InitCSP(nsIChannel* aChannel); + nsresult InitCOEP(nsIChannel* aChannel); + + nsresult InitReferrerInfo(nsIChannel* aChannel); + + void PostUnblockOnloadEvent(); + + void DoUnblockOnload(); + + void DoResolveScheduledPresAttrs(); + + void RetrieveRelevantHeaders(nsIChannel* aChannel); + + void TryChannelCharset(nsIChannel* aChannel, int32_t& aCharsetSource, + NotNull<const Encoding*>& aEncoding, + nsHtml5TreeOpExecutor* aExecutor); + + MOZ_CAN_RUN_SCRIPT void DispatchContentLoadedEvents(); + + // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230) + MOZ_CAN_RUN_SCRIPT_BOUNDARY void DispatchPageTransition( + EventTarget* aDispatchTarget, const nsAString& aType, bool aInFrameSwap, + bool aPersisted, bool aOnlySystemGroup); + + // Call this before the document does something that will unbind all content. + // That will stop us from doing a lot of work as each element is removed. + void DestroyElementMaps(); + + Element* GetRootElementInternal() const; + + void SetPageUnloadingEventTimeStamp() { + MOZ_ASSERT(!mPageUnloadingEventTimeStamp); + mPageUnloadingEventTimeStamp = TimeStamp::NowLoRes(); + } + + void CleanUnloadEventsTimeStamp() { + MOZ_ASSERT(mPageUnloadingEventTimeStamp); + mPageUnloadingEventTimeStamp = TimeStamp(); + } + + /** + * Clears any Servo element data stored on Elements in the document. + */ + void ClearStaleServoData(); + + /** + * Do the tree-disconnection that ResetToURI and document.open need to do. + */ + void DisconnectNodeTree(); + + /** + * MaybeDispatchCheckKeyPressEventModelEvent() dispatches + * "CheckKeyPressEventModel" event to check whether we should dispatch + * keypress events in confluent model or split model. This should be + * called only when mEditingState is changed to eDesignMode or + * eConentEditable at first time. + */ + void MaybeDispatchCheckKeyPressEventModelEvent(); + + /* Midas implementation */ + nsCommandManager* GetMidasCommandManager(); + + MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult TurnEditingOff(); + + // MOZ_CAN_RUN_SCRIPT_BOUNDARY because this is called from all sorts + // of places, and I'm pretty sure the exact ExecCommand call it + // makes cannot actually run script. + MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult EditingStateChanged(); + + void MaybeEditingStateChanged(); + + public: + // Get the root <html> element, or return null if there isn't one (e.g. + // if the root isn't <html>) + Element* GetHtmlElement() const; + // Returns the first child of GetHtmlContent which has the given tag, + // or nullptr if that doesn't exist. + Element* GetHtmlChildElement(nsAtom* aTag); + // Get the canonical <body> element, or return null if there isn't one (e.g. + // if the root isn't <html> or if the <body> isn't there) + HTMLBodyElement* GetBodyElement(); + // Get the canonical <head> element, or return null if there isn't one (e.g. + // if the root isn't <html> or if the <head> isn't there) + Element* GetHeadElement() { return GetHtmlChildElement(nsGkAtoms::head); } + // Get the "body" in the sense of document.body: The first <body> or + // <frameset> that's a child of a root <html> + nsGenericHTMLElement* GetBody(); + // Set the "body" in the sense of document.body. + void SetBody(nsGenericHTMLElement* aBody, ErrorResult& rv); + // Get the "head" element in the sense of document.head. + HTMLSharedElement* GetHead(); + + ServoStyleSet* StyleSetForPresShell() const { + MOZ_ASSERT(!!mStyleSet.get()); + return mStyleSet.get(); + } + + inline ServoStyleSet& EnsureStyleSet() const; + + // ShadowRoot has APIs that can change styles. This notifies the shell that + // stlyes applicable in the shadow tree have potentially changed. + void RecordShadowStyleChange(ShadowRoot&); + + // Needs to be called any time the applicable style can has changed, in order + // to schedule a style flush and setup all the relevant state. + // + // If we know the stylesheet change applies only to a shadow tree we can avoid + // some work (like updating the font-face-set / counter-styles / etc, as those + // are global). + void ApplicableStylesChanged(bool aKnownInShadowTree = false); + + // Whether we filled the style set with any style sheet. Only meant to be used + // from DocumentOrShadowRoot::Traverse. + bool StyleSetFilled() const { return mStyleSetFilled; } + + /** + * Accessors to the collection of stylesheets owned by this document. + * Style sheets are ordered, most significant last. + */ + + void InsertSheetAt(size_t aIndex, StyleSheet&); + + /** + * Add a stylesheet to the document + * + * TODO(emilio): This is only used by parts of editor that are no longer in + * use by m-c or c-c, so remove. + */ + void AddStyleSheet(StyleSheet* aSheet) { + MOZ_ASSERT(aSheet); + InsertSheetAt(SheetCount(), *aSheet); + } + + /** + * Notify the document that the applicable state of the sheet changed + * and that observers should be notified and style sets updated + */ + void StyleSheetApplicableStateChanged(StyleSheet&); + void PostStyleSheetApplicableStateChangeEvent(StyleSheet&); + void PostStyleSheetRemovedEvent(StyleSheet&); + void PostCustomPropertyRegistered(const dom::PropertyDefinition&); + + enum additionalSheetType { + eAgentSheet, + eUserSheet, + eAuthorSheet, + AdditionalSheetTypeCount + }; + + nsresult LoadAdditionalStyleSheet(additionalSheetType aType, + nsIURI* aSheetURI); + nsresult AddAdditionalStyleSheet(additionalSheetType aType, + StyleSheet* aSheet); + void RemoveAdditionalStyleSheet(additionalSheetType aType, nsIURI* sheetURI); + + StyleSheet* GetFirstAdditionalAuthorSheet() { + return mAdditionalSheets[eAuthorSheet].SafeElementAt(0); + } + + /** + * Returns the index that aSheet should be inserted at to maintain document + * ordering. + */ + size_t FindDocStyleSheetInsertionPoint(const StyleSheet& aSheet); + + /** + * Get this document's CSSLoader. This is guaranteed to not return null. + */ + css::Loader* CSSLoader() const { return mCSSLoader; } + + /** + * Get this document's StyleImageLoader. This is guaranteed to not return + * null. + */ + css::ImageLoader* StyleImageLoader() const { return mStyleImageLoader; } + + /** + * Get the channel that was passed to StartDocumentLoad or Reset for this + * document. Note that this may be null in some cases (eg if + * StartDocumentLoad or Reset were never called) + */ + nsIChannel* GetChannel() const { return mChannel; } + + /** + * Get this document's attribute stylesheet. May return null if + * there isn't one. + */ + AttributeStyles* GetAttributeStyles() const { return mAttributeStyles.get(); } + + virtual void SetScriptGlobalObject(nsIScriptGlobalObject* aGlobalObject); + + /** + * Get/set the object from which the context for the event/script handling can + * be got. Normally GetScriptHandlingObject() returns the same object as + * GetScriptGlobalObject(), but if the document is loaded as data, + * non-null may be returned, even if GetScriptGlobalObject() returns null. + * aHasHadScriptHandlingObject is set true if document has had the object + * for event/script handling. Do not process any events/script if the method + * returns null, but aHasHadScriptHandlingObject is true. + */ + nsIScriptGlobalObject* GetScriptHandlingObject( + bool& aHasHadScriptHandlingObject) const { + aHasHadScriptHandlingObject = mHasHadScriptHandlingObject; + return mScriptGlobalObject ? mScriptGlobalObject.get() + : GetScriptHandlingObjectInternal(); + } + void SetScriptHandlingObject(nsIScriptGlobalObject* aScriptObject); + + /** + * Get the object that is used as the scope for all of the content + * wrappers whose owner document is this document. Unlike the script global + * object, this will only return null when the global object for this + * document is truly gone. Use this object when you're trying to find a + * content wrapper in XPConnect. + */ + nsIGlobalObject* GetScopeObject() const; + void SetScopeObject(nsIGlobalObject* aGlobal); + + /** + * Return the window containing the document (the outer window). + */ + nsPIDOMWindowOuter* GetWindow() const { + return mWindow ? mWindow->GetOuterWindow() : GetWindowInternal(); + } + + bool IsInBackgroundWindow() const { + auto* outer = mWindow ? mWindow->GetOuterWindow() : nullptr; + return outer && outer->IsBackground(); + } + + /** + * Return the inner window used as the script compilation scope for + * this document. If you're not absolutely sure you need this, use + * GetWindow(). + */ + nsPIDOMWindowInner* GetInnerWindow() const { + return mRemovedFromDocShell ? nullptr : mWindow; + } + + /** + * Return the outer window ID. + */ + uint64_t OuterWindowID() const { + nsPIDOMWindowOuter* window = GetWindow(); + return window ? window->WindowID() : 0; + } + + /** + * Return the inner window ID. + */ + uint64_t InnerWindowID() const { + nsPIDOMWindowInner* window = GetInnerWindow(); + return window ? window->WindowID() : 0; + } + + /** + * Return WindowGlobalChild that is associated with the inner window. + */ + WindowGlobalChild* GetWindowGlobalChild() { + return GetInnerWindow() ? GetInnerWindow()->GetWindowGlobalChild() + : nullptr; + } + + /** + * Return WindowContext associated with the inner window. + */ + WindowContext* GetWindowContext() const { + return GetInnerWindow() ? GetInnerWindow()->GetWindowContext() : nullptr; + } + + bool IsTopLevelWindowInactive() const { + return mState.HasState(DocumentState::WINDOW_INACTIVE); + } + + /** + * Get the script loader for this document + */ + dom::ScriptLoader* ScriptLoader() { return mScriptLoader; } + + /** + * Add/Remove an element to the document's id and name hashes + */ + void AddToIdTable(Element* aElement, nsAtom* aId); + void RemoveFromIdTable(Element* aElement, nsAtom* aId); + void AddToNameTable(Element* aElement, nsAtom* aName); + void RemoveFromNameTable(Element* aElement, nsAtom* aName); + + /** + * Returns all elements in the top layer in the insertion order. + */ + nsTArray<Element*> GetTopLayer() const; + + bool TopLayerContains(Element&) const; + + // Do the "fullscreen element ready check" from the fullscreen spec. + // It returns true if the given element is allowed to go into fullscreen. + // It is responsive to dispatch "fullscreenerror" event when necessary. + bool FullscreenElementReadyCheck(FullscreenRequest&); + + /** + * When this is called on content process, this asynchronously requests that + * the document make aElement the fullscreen element, and move into fullscreen + * mode. The current fullscreen element (if any) is pushed onto the top layer, + * and it can be returned to fullscreen status by calling + * RestorePreviousFullscreenState(). + * If on chrome process, this is synchronously. + * + * Note that requesting fullscreen in a document also makes the element which + * contains this document in this document's parent document fullscreen. i.e. + * the <iframe> or <browser> that contains this document is also mode + * fullscreen. This happens recursively in all ancestor documents. + */ + void RequestFullscreen(UniquePtr<FullscreenRequest> aRequest, + bool aApplyFullscreenDirectly = false); + + private: + void RequestFullscreenInContentProcess(UniquePtr<FullscreenRequest> aRequest, + bool aApplyFullscreenDirectly); + void RequestFullscreenInParentProcess(UniquePtr<FullscreenRequest> aRequest, + bool aApplyFullscreenDirectly); + + // Pushes aElement onto the top layer + void TopLayerPush(Element&); + + // Removes the topmost element for which aPredicate returns true from the top + // layer. The removed element, if any, is returned. + Element* TopLayerPop(FunctionRef<bool(Element*)> aPredicate); + + // Removes the given element from the top layer. The removed element, if any, + // is returned. + Element* TopLayerPop(Element&); + + MOZ_CAN_RUN_SCRIPT bool TryAutoFocusCandidate(Element& aElement); + + public: + // Removes all the elements with fullscreen flag set from the top layer, and + // clears their fullscreen flag. + void CleanupFullscreenState(); + + // Pops the fullscreen element from the top layer and clears its + // fullscreen flag. Returns whether there was any fullscreen element. + enum class UpdateViewport : bool { No, Yes }; + bool PopFullscreenElement(UpdateViewport = UpdateViewport::Yes); + + // Pushes the given element into the top of top layer and set fullscreen + // flag. + void SetFullscreenElement(Element&); + + // Whether we has pending fullscreen request. + bool HasPendingFullscreenRequests(); + + /** + * When Esc key is pressed, cancel the dialog element if the document is + * blocked by the dialog or hide popover if popover is shown. + */ + MOZ_CAN_RUN_SCRIPT void HandleEscKey(); + + void AddModalDialog(HTMLDialogElement&); + void RemoveModalDialog(HTMLDialogElement&); + + /** + * Called when a frame in a child process has entered fullscreen or when a + * fullscreen frame in a child process changes to another origin. + * aFrameElement is the frame element which contains the child-process + * fullscreen document. + */ + void RemoteFrameFullscreenChanged(Element* aFrameElement); + + /** + * Called when a frame in a remote child document has rolled back fullscreen + * so that all its top layer are empty; we must continue the + * rollback in this parent process' doc tree branch which is fullscreen. + * Note that only one branch of the document tree can have its documents in + * fullscreen state at one time. We're in inconsistent state if a + * fullscreen document has a parent and that parent isn't fullscreen. We + * preserve this property across process boundaries. + */ + void RemoteFrameFullscreenReverted(); + + /** + * Restores the previous fullscreen element to fullscreen status. If there + * is no former fullscreen element, this exits fullscreen, moving the + * top-level browser window out of fullscreen mode. + */ + void RestorePreviousFullscreenState(UniquePtr<FullscreenExit>); + + /** + * Returns true if this document is a fullscreen leaf document, i.e. it + * is in fullscreen mode and has no fullscreen children. + */ + bool IsFullscreenLeaf(); + + /** + * Returns the document which is at the root of this document's branch + * in the in-process document tree. Returns nullptr if the document isn't + * fullscreen. + */ + Document* GetFullscreenRoot() const { return mFullscreenRoot; } + + size_t CountFullscreenElements() const; + + /** + * Sets the fullscreen root to aRoot. This stores a weak reference to aRoot + * in this document. + */ + void SetFullscreenRoot(Document* aRoot) { mFullscreenRoot = aRoot; } + + /** + * Synchronously cleans up the fullscreen state on the given document. + * + * Calling this without performing fullscreen transition could lead + * to undesired effect (the transition happens after document state + * flips), hence it should only be called either by nsGlobalWindow + * when we have performed the transition, or when it is necessary to + * clean up the state immediately. Otherwise, AsyncExitFullscreen() + * should be called instead. + * + * aDocument must not be null. + */ + static void ExitFullscreenInDocTree(Document* aDocument); + + /** + * Ask the document to exit fullscreen state asynchronously. + * + * Different from ExitFullscreenInDocTree(), this allows the window + * to perform fullscreen transition first if any. + * + * If aDocument is null, it will exit fullscreen from all documents + * in all windows. + */ + static void AsyncExitFullscreen(Document* aDocument); + + /** + * Handles any pending fullscreen in aDocument or its subdocuments. + * + * Returns whether there is any fullscreen request handled. + */ + static bool HandlePendingFullscreenRequests(Document* aDocument); + + /** + * Clear pending fullscreen in aDocument. + */ + static void ClearPendingFullscreenRequests(Document* aDocument); + + // ScreenOrientation related APIs + + void ClearOrientationPendingPromise(); + bool SetOrientationPendingPromise(Promise* aPromise); + Promise* GetOrientationPendingPromise() const { + return mOrientationPendingPromise; + } + + //---------------------------------------------------------------------- + + // Document notification API's + + /** + * Add a new observer of document change notifications. Whenever + * content is changed, appended, inserted or removed the observers are + * informed. An observer that is already observing the document must + * not be added without being removed first. + */ + void AddObserver(nsIDocumentObserver* aObserver); + + /** + * Remove an observer of document change notifications. This will + * return false if the observer cannot be found. + */ + bool RemoveObserver(nsIDocumentObserver* aObserver); + + // Observation hooks used to propagate notifications to document observers. + // BeginUpdate must be called before any batch of modifications of the + // content model or of style data, EndUpdate must be called afterward. + // To make this easy and painless, use the mozAutoDocUpdate helper class. + void BeginUpdate(); + void EndUpdate(); + uint32_t UpdateNestingLevel() { return mUpdateNestLevel; } + + void BeginLoad(); + virtual void EndLoad(); + + enum ReadyState { + READYSTATE_UNINITIALIZED = 0, + READYSTATE_LOADING = 1, + READYSTATE_INTERACTIVE = 3, + READYSTATE_COMPLETE = 4 + }; + // Set the readystate of the document. If aUpdateTimingInformation is true, + // this will record relevant timestamps in the document's performance timing. + // Some consumers (document.open is the only one right now, actually) don't + // want to do that, though. + void SetReadyStateInternal(ReadyState, bool aUpdateTimingInformation = true); + ReadyState GetReadyStateEnum() { return mReadyState; } + + void NotifyLoading(bool aNewParentIsLoading, const ReadyState& aCurrentState, + ReadyState aNewState); + + void NotifyAbortedLoad(); + + // Notify that an element changed state. This must happen under a + // scriptblocker but NOT within a begin/end update. + void ElementStateChanged(Element*, ElementState); + + // Update a set of document states that may have changed. + // This should only be called by callers whose state is also reflected in the + // implementation of Document::State. + // + // aNotify controls whether we notify our DocumentStatesChanged observers. + void UpdateDocumentStates(DocumentState aMaybeChangedStates, bool aNotify); + + void ResetDocumentDirection(); + + // Observation hooks for style data to propagate notifications + // to document observers + void RuleChanged(StyleSheet&, css::Rule*, StyleRuleChangeKind); + void RuleAdded(StyleSheet&, css::Rule&); + void RuleRemoved(StyleSheet&, css::Rule&); + void SheetCloned(StyleSheet&) {} + void ImportRuleLoaded(CSSImportRule&, StyleSheet&); + + /** + * Flush notifications for this document and its parent documents + * (since those may affect the layout of this one). + */ + void FlushPendingNotifications(FlushType aType); + + /** + * Another variant of the above FlushPendingNotifications. This function + * takes a ChangesToFlush to specify whether throttled animations are flushed + * or not. + * If in doubt, use the above FlushPendingNotifications. + */ + MOZ_CAN_RUN_SCRIPT_BOUNDARY + void FlushPendingNotifications(ChangesToFlush aFlush); + + /** + * Calls FlushPendingNotifications on any external resources this document + * has. If this document has no external resources or is an external resource + * itself this does nothing. This should only be called with + * aType >= FlushType::Style. + */ + void FlushExternalResources(FlushType aType); + + void AddWorkerDocumentListener(WorkerDocumentListener* aListener); + void RemoveWorkerDocumentListener(WorkerDocumentListener* aListener); + + // Triggers an update of <svg:use> element shadow trees. + void UpdateSVGUseElementShadowTrees() { + if (mSVGUseElementsNeedingShadowTreeUpdate.IsEmpty()) { + return; + } + DoUpdateSVGUseElementShadowTrees(); + } + + /** + * Only to be used inside Gecko, you can't really do anything with the + * pointer outside Gecko anyway. + */ + nsNodeInfoManager* NodeInfoManager() const { return mNodeInfoManager; } + + /** + * Reset the document using the given channel and loadgroup. This works + * like ResetToURI, but also sets the document's channel to aChannel. + * The principal of the document will be set from the channel. + */ + virtual void Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup); + + /** + * Reset this document to aURI, aLoadGroup, aPrincipal and + * aPartitionedPrincipal. aURI must not be null. If aPrincipal is null, a + * content principal based on aURI will be used. + */ + virtual void ResetToURI(nsIURI* aURI, nsILoadGroup* aLoadGroup, + nsIPrincipal* aPrincipal, + nsIPrincipal* aPartitionedPrincipal); + + /** + * Set the container (docshell) for this document. Virtual so that + * docshell can call it. + */ + virtual void SetContainer(nsDocShell* aContainer); + + /** + * Get the container (docshell) for this document. + */ + nsISupports* GetContainer() const; + + /** + * Get the container's load context for this document. + */ + nsILoadContext* GetLoadContext() const; + + /** + * Get docshell the for this document. + */ + nsIDocShell* GetDocShell() const; + + /** + * Set and get XML declaration. If aVersion is null there is no declaration. + * aStandalone takes values -1, 0 and 1 indicating respectively that there + * was no standalone parameter in the declaration, that it was given as no, + * or that it was given as yes. + */ + void SetXMLDeclaration(const char16_t* aVersion, const char16_t* aEncoding, + const int32_t aStandalone); + void GetXMLDeclaration(nsAString& aVersion, nsAString& aEncoding, + nsAString& Standalone); + + /** + * Returns the bits for the color-scheme specified by the + * <meta name="color-scheme">. + */ + uint8_t GetColorSchemeBits() const { return mColorSchemeBits; } + + /** + * Traverses the DOM and computes the supported color schemes as per + * https://html.spec.whatwg.org/#meta-color-scheme + */ + void RecomputeColorScheme(); + void AddColorSchemeMeta(HTMLMetaElement&); + void RemoveColorSchemeMeta(HTMLMetaElement&); + + /** + * Returns true if this is what HTML 5 calls an "HTML document" (for example + * regular HTML document with Content-Type "text/html", image documents and + * media documents). Returns false for XHTML and any other documents parsed + * by the XML parser. + */ + bool IsHTMLDocument() const { return mType == eHTML; } + bool IsHTMLOrXHTML() const { return mType == eHTML || mType == eXHTML; } + bool IsImageDocument() const { + return MediaDocumentKind() == MediaDocumentKind::Image; + } + bool IsXMLDocument() const { return !IsHTMLDocument(); } + bool IsSVGDocument() const { return mType == eSVG; } + bool IsUnstyledDocument() { return IsLoadedAsData(); } + bool LoadsFullXULStyleSheetUpFront() { + if (IsSVGDocument()) { + return false; + } + return AllowXULXBL(); + } + + bool IsScriptEnabled() const; + + /** + * Returns true if this document was created from a nsXULPrototypeDocument. + */ + bool LoadedFromPrototype() const { return mPrototypeDocument; } + /** + * Returns the prototype the document was created from, or null if it was not + * created from a prototype. + */ + nsXULPrototypeDocument* GetPrototype() const { return mPrototypeDocument; } + + bool IsTopLevelContentDocument() const { return mIsTopLevelContentDocument; } + void SetIsTopLevelContentDocument(bool aIsTopLevelContentDocument) { + mIsTopLevelContentDocument = aIsTopLevelContentDocument; + } + + bool IsContentDocument() const { return mIsContentDocument; } + void SetIsContentDocument(bool aIsContentDocument) { + mIsContentDocument = aIsContentDocument; + } + + void ProcessMETATag(HTMLMetaElement* aMetaElement); + /** + * Create an element with the specified name, prefix and namespace ID. + * Returns null if element name parsing failed. + */ + already_AddRefed<Element> CreateElem(const nsAString& aName, nsAtom* aPrefix, + int32_t aNamespaceID, + const nsAString* aIs = nullptr); + + /** + * Get the security info (i.e. SSL state etc) that the document got + * from the channel/document that created the content of the + * document. + * + * @see nsIChannel + */ + nsITransportSecurityInfo* GetSecurityInfo() { return mSecurityInfo; } + + /** + * Get the channel that failed to load and resulted in an error page, if it + * exists. This is only relevant to error pages. + */ + nsIChannel* GetFailedChannel() const { return mFailedChannel; } + + /** + * This function checks if the document that is trying to access + * GetNetErrorInfo is a trusted about net error page or not. + */ + static bool CallerIsTrustedAboutNetError(JSContext* aCx, JSObject* aObject); + + /** + * This function checks if the document that is trying to access + * ReloadWithHttpsOnlyException is a trusted HTTPS only error page. + */ + static bool CallerIsTrustedAboutHttpsOnlyError(JSContext* aCx, + JSObject* aObject); + + /** + * Get security info like error code for a failed channel. This + * property is only exposed to about:neterror documents. + */ + void GetNetErrorInfo(mozilla::dom::NetErrorInfo& aInfo, ErrorResult& aRv); + + /** + * This function checks if the document that is trying to access + * GetFailedCertSecurityInfo is a trusted cert error page or not. + */ + static bool CallerIsTrustedAboutCertError(JSContext* aCx, JSObject* aObject); + + /** + * This function checks if the privilege storage access api is available for + * the caller. We only allow privilege SSA to be called by system principal + * and webcompat extension. + */ + static bool CallerCanAccessPrivilegeSSA(JSContext* aCx, JSObject* aObject); + + /** + * Get the security info (i.e. certificate validity, errorCode, etc) for a + * failed Channel. This property is only exposed for about:certerror + * documents. + */ + void GetFailedCertSecurityInfo(mozilla::dom::FailedCertSecurityInfo& aInfo, + ErrorResult& aRv); + + /** + * Set the channel that failed to load and resulted in an error page. + * This is only relevant to error pages. + */ + void SetFailedChannel(nsIChannel* aChannel) { mFailedChannel = aChannel; } + + /** + * Returns the default namespace ID used for elements created in this + * document. + */ + int32_t GetDefaultNamespaceID() const { return mDefaultElementType; } + + void RemoveAllProperties(); + void RemoveAllPropertiesFor(nsINode* aNode); + + nsPropertyTable& PropertyTable() { return mPropertyTable; } + + /** + * Sets the ID used to identify this part of the multipart document + */ + void SetPartID(uint32_t aID) { mPartID = aID; } + + /** + * Return the ID used to identify this part of the multipart document + */ + uint32_t GetPartID() const { return mPartID; } + + /** + * Sanitize the document by resetting all input elements and forms that have + * autocomplete=off to their default values. + * TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230) + */ + MOZ_CAN_RUN_SCRIPT_BOUNDARY void Sanitize(); + + /** + * Enumerate all subdocuments. + * The enumerator callback should return CallState::Continue to continue + * enumerating, or CallState::Stop to stop. This will never get passed a null + * aDocument. + */ + using SubDocEnumFunc = FunctionRef<CallState(Document&)>; + void EnumerateSubDocuments(SubDocEnumFunc aCallback); + + /** + * Collect all the descendant documents for which |aCalback| returns true. + * The callback function must not mutate any state for the given document. + */ + using nsDocTestFunc = bool (*)(const Document* aDocument); + void CollectDescendantDocuments(nsTArray<RefPtr<Document>>& aDescendants, + nsDocTestFunc aCallback) const; + + /** + * Check whether it is safe to cache the presentation of this document + * and all of its subdocuments (depending on the 3rd param). This method + * checks the following conditions recursively: + * - Some document types, such as plugin documents, cannot be safely cached. + * - If there are any pending requests, we don't allow the presentation + * to be cached. Ideally these requests would be suspended and resumed, + * but that is difficult in some cases, such as XMLHttpRequest. + * - If there are any beforeunload or unload listeners, we must fire them + * for correctness, but this likely puts the document into a state where + * it would not function correctly if restored. + * + * |aNewRequest| should be the request for a new document which will + * replace this document in the docshell. The new document's request + * will be ignored when checking for active requests. If there is no + * request associated with the new document, this parameter may be null. + * + * |aBFCacheCombo| is used as a bitmask to indicate what the status + * combination is when we try to BFCache aNewRequest + */ + virtual bool CanSavePresentation(nsIRequest* aNewRequest, + uint32_t& aBFCacheCombo, + bool aIncludeSubdocuments, + bool aAllowUnloadListeners = true); + + /** + * Pass principals if the correct ones are known when calling Init. That way + * NodeInfoManager doesn't need to create a temporary null principal. + */ + virtual nsresult Init(nsIPrincipal* aPrincipal, + nsIPrincipal* aPartitionedPrincipal); + + /** + * Notify the document that its associated ContentViewer is being destroyed. + * This releases circular references so that the document can go away. + * Destroy() is only called on documents that have a content viewer. + */ + virtual void Destroy(); + + /** + * Notify the document that its associated ContentViewer is no longer + * the current viewer for the docshell. The document might still + * be rendered in "zombie state" until the next document is ready. + * The document should save form control state. + */ + void RemovedFromDocShell(); + + /** + * Get the layout history state that should be used to save and restore state + * for nodes in this document. This may return null; if that happens state + * saving and restoration is not possible. + */ + already_AddRefed<nsILayoutHistoryState> GetLayoutHistoryState() const; + + /** + * Methods that can be used to prevent onload firing while an event that + * should block onload is posted. onload is guaranteed to not fire until + * either all calls to BlockOnload() have been matched by calls to + * UnblockOnload() or the load has been stopped altogether (by the user + * pressing the Stop button, say). + */ + void BlockOnload(); + /** + * @param aFireSync whether to fire onload synchronously. If false, + * onload will fire asynchronously after all onload blocks have been + * removed. It will NOT fire from inside UnblockOnload. If true, + * onload may fire from inside UnblockOnload. + */ + void UnblockOnload(bool aFireSync); + + // Only BlockOnload should call this! + void AsyncBlockOnload(); + + void BlockDOMContentLoaded() { ++mBlockDOMContentLoaded; } + + MOZ_CAN_RUN_SCRIPT_BOUNDARY void UnblockDOMContentLoaded(); + + /** + * Notification that the page has been shown, for documents which are loaded + * into a DOM window. This corresponds to the completion of document load, + * or to the page's presentation being restored into an existing DOM window. + * This notification fires applicable DOM events to the content window. See + * PageTransitionEvent.webidl for a description of the |aPersisted| + * parameter. If aDispatchStartTarget is null, the pageshow event is + * dispatched on the ScriptGlobalObject for this document, otherwise it's + * dispatched on aDispatchStartTarget. If |aOnlySystemGroup| is true, the + * event is only dispatched to listeners in the system group. + * Note: if aDispatchStartTarget isn't null, the showing state of the + * document won't be altered. + */ + virtual void OnPageShow(bool aPersisted, EventTarget* aDispatchStartTarget, + bool aOnlySystemGroup = false); + + /** + * Notification that the page has been hidden, for documents which are loaded + * into a DOM window. This corresponds to the unloading of the document, or + * to the document's presentation being saved but removed from an existing + * DOM window. This notification fires applicable DOM events to the content + * window. See PageTransitionEvent.webidl for a description of the + * |aPersisted| parameter. If aDispatchStartTarget is null, the pagehide + * event is dispatched on the ScriptGlobalObject for this document, + * otherwise it's dispatched on aDispatchStartTarget. If |aOnlySystemGroup| is + * true, the event is only dispatched to listeners in the system group. + * Note: if aDispatchStartTarget isn't null, the showing state of the + * document won't be altered. + */ + void OnPageHide(bool aPersisted, EventTarget* aDispatchStartTarget, + bool aOnlySystemGroup = false); + + /* + * We record the set of links in the document that are relevant to + * style. + */ + /** + * Notification that an element is a link that is relevant to style. + */ + void AddStyleRelevantLink(Link* aLink) { + NS_ASSERTION(aLink, "Passing in a null link. Expect crashes RSN!"); +#ifdef DEBUG + NS_ASSERTION(!mStyledLinks.Contains(aLink), + "Document already knows about this Link!"); + mStyledLinksCleared = false; +#endif + mStyledLinks.Insert(aLink); + } + + /** + * Notification that an element is a link and its URI might have been + * changed or the element removed. If the element is still a link relevant + * to style, then someone must ensure that AddStyleRelevantLink is + * (eventually) called on it again. + */ + void ForgetLink(Link* aLink) { + MOZ_ASSERT(aLink, "Passing in a null link. Expect crashes RSN!"); + MOZ_ASSERT(mStyledLinks.Contains(aLink) || mStyledLinksCleared, + "Document knows nothing about this Link!"); + mStyledLinks.Remove(aLink); + } + + // Refreshes the hrefs of all the links in the document. + void RefreshLinkHrefs(); + + /** + * Support for window.matchMedia() + */ + + already_AddRefed<MediaQueryList> MatchMedia(const nsACString& aMediaQueryList, + CallerType aCallerType); + + LinkedList<MediaQueryList>& MediaQueryLists() { return mDOMMediaQueryLists; } + + nsTHashtable<LCPEntryHashEntry>& ContentIdentifiersForLCP() { + return mContentIdentifiersForLCP; + } + + /** + * Get the compatibility mode for this document + */ + nsCompatibility GetCompatibilityMode() const { return mCompatMode; } + + /** + * Check whether we've ever fired a DOMTitleChanged event for this + * document. + */ + bool HaveFiredDOMTitleChange() const { return mHaveFiredTitleChange; } + + /** + * To batch DOMSubtreeModified, document needs to be informed when + * a mutation event might be dispatched, even if the event isn't actually + * created because there are no listeners for it. + * + * @param aTarget is the target for the mutation event. + */ + void MayDispatchMutationEvent(nsINode* aTarget) { + if (mSubtreeModifiedDepth > 0) { + mSubtreeModifiedTargets.AppendObject(aTarget); + } + } + + /** + * Marks as not-going-to-be-collected for the given generation of + * cycle collection. + */ + void MarkUncollectableForCCGeneration(uint32_t aGeneration) { + mMarkedCCGeneration = aGeneration; + } + + /** + * Gets the cycle collector generation this document is marked for. + */ + uint32_t GetMarkedCCGeneration() { return mMarkedCCGeneration; } + + /** + * Returns whether this document is cookie averse. See + * https://html.spec.whatwg.org/multipage/dom.html#cookie-averse-document-object + */ + bool IsCookieAverse() const { + // If we are a document that "has no browsing context." + if (!GetInnerWindow()) { + return true; + } + + // If we are a document "whose URL's scheme is not a network scheme." + // NB: Explicitly allow file: URIs to store cookies. + + return !NodePrincipal()->SchemeIs("http") && + !NodePrincipal()->SchemeIs("https") && + !NodePrincipal()->SchemeIs("file"); + } + + bool IsLoadedAsData() { return mLoadedAsData; } + + void SetAddedToMemoryReportAsDataDocument() { + mAddedToMemoryReportingAsDataDocument = true; + } + + void UnregisterFromMemoryReportingForDataDocument(); + + bool MayStartLayout() { return mMayStartLayout; } + + void SetMayStartLayout(bool aMayStartLayout); + + already_AddRefed<nsIDocumentEncoder> GetCachedEncoder(); + + void SetCachedEncoder(already_AddRefed<nsIDocumentEncoder> aEncoder); + + // In case of failure, the document really can't initialize the frame loader. + nsresult InitializeFrameLoader(nsFrameLoader* aLoader); + // In case of failure, the caller must handle the error, for example by + // finalizing frame loader asynchronously. + nsresult FinalizeFrameLoader(nsFrameLoader* aLoader, nsIRunnable* aFinalizer); + // Removes the frame loader of aShell from the initialization list. + void TryCancelFrameLoaderInitialization(nsIDocShell* aShell); + + /** + * Check whether this document is a root document that is not an + * external resource. + */ + bool IsRootDisplayDocument() const { + return !mParentDocument && !mDisplayDocument; + } + + bool ChromeRulesEnabled() const { return mChromeRulesEnabled; } + + bool IsInChromeDocShell() const { + const Document* root = this; + while (const Document* displayDoc = root->GetDisplayDocument()) { + root = displayDoc; + } + return root->mInChromeDocShell; + } + + bool IsBeingUsedAsImage() const { return mIsBeingUsedAsImage; } + + void SetIsBeingUsedAsImage() { mIsBeingUsedAsImage = true; } + + bool IsSVGGlyphsDocument() const { return mIsSVGGlyphsDocument; } + + void SetIsSVGGlyphsDocument() { mIsSVGGlyphsDocument = true; } + + bool IsResourceDoc() const { + return IsBeingUsedAsImage() || // Are we a helper-doc for an SVG image? + mHasDisplayDocument; // Are we an external resource doc? + } + + /** + * Get the document for which this document is an external resource. This + * will be null if this document is not an external resource. Otherwise, + * GetDisplayDocument() will return a non-null document, and + * GetDisplayDocument()->GetDisplayDocument() is guaranteed to be null. + */ + Document* GetDisplayDocument() const { return mDisplayDocument; } + + /** + * Set the display document for this document. aDisplayDocument must not be + * null. + */ + void SetDisplayDocument(Document* aDisplayDocument) { + MOZ_ASSERT(!GetPresShell() && !GetContainer() && !GetWindow(), + "Shouldn't set mDisplayDocument on documents that already " + "have a presentation or a docshell or a window"); + MOZ_ASSERT(aDisplayDocument, "Must not be null"); + MOZ_ASSERT(aDisplayDocument != this, "Should be different document"); + MOZ_ASSERT(!aDisplayDocument->GetDisplayDocument(), + "Display documents should not nest"); + mDisplayDocument = aDisplayDocument; + mHasDisplayDocument = !!aDisplayDocument; + } + + /** + * Request an external resource document for aURI. This will return the + * resource document if available. If one is not available yet, it will + * start loading as needed, and the pending load object will be returned in + * aPendingLoad so that the caller can register an observer to wait for the + * load. If this function returns null and doesn't return a pending load, + * that means that there is no resource document for this URI and won't be + * one in the future. + * + * @param aURI the URI to get + * @param aReferrerInfo the referrerInfo of the request + * @param aRequestingNode the node making the request + * @param aPendingLoad the pending load for this request, if any + */ + Document* RequestExternalResource(nsIURI* aURI, + nsIReferrerInfo* aReferrerInfo, + nsINode* aRequestingNode, + ExternalResourceLoad** aPendingLoad); + + /** + * Enumerate the external resource documents associated with this document. + * The enumerator callback should return CallState::Continue to continue + * enumerating, or CallState::Stop to stop. This callback will never get + * passed a null aDocument. + */ + void EnumerateExternalResources(SubDocEnumFunc aCallback); + + dom::ExternalResourceMap& ExternalResourceMap() { + return mExternalResourceMap; + } + + /** + * Return whether the document is currently showing (in the sense of + * OnPageShow() having been called already and OnPageHide() not having been + * called yet. + */ + bool IsShowing() const { return mIsShowing; } + /** + * Return whether the document is currently visible (in the sense of + * OnPageHide having been called and OnPageShow not yet having been called) + */ + bool IsVisible() const { return mVisible; } + + void SetSuppressedEventListener(EventListener* aListener); + + EventListener* GetSuppressedEventListener() { + return mSuppressedEventListener; + } + + /** + * Return true when this document is active, i.e., an active document + * in a content viewer and not in the bfcache. + * This does NOT match the "active document" concept in the WHATWG spec - + * see IsCurrentActiveDocument. + */ + bool IsActive() const; + + /** + * Return true if this is the current active document for its + * docshell. Note that a docshell may have multiple active documents + * due to the bfcache -- this should be used when you need to + * differentiate the *current* active document from any active + * documents. + */ + bool IsCurrentActiveDocument() const { + nsPIDOMWindowInner* inner = GetInnerWindow(); + return inner && inner->IsCurrentInnerWindow() && inner->GetDoc() == this; + } + + /** + * Returns whether this document should perform image loads. + */ + bool ShouldLoadImages() const { + // We check IsBeingUsedAsImage() so that SVG documents loaded as + // images can themselves have data: URL image references. + return IsCurrentActiveDocument() || IsBeingUsedAsImage() || + IsStaticDocument(); + } + + void SetHasPrintCallbacks() { + MOZ_DIAGNOSTIC_ASSERT(IsStaticDocument()); + mHasPrintCallbacks = true; + } + + bool HasPrintCallbacks() const { return mHasPrintCallbacks; } + + /** + * Register/Unregister the ActivityObserver into mActivityObservers to listen + * the document's activity changes such as OnPageHide, visibility, activity. + * The ActivityObserver objects can be nsIObjectLoadingContent or + * nsIDocumentActivity or HTMLMEdiaElement. + */ + void RegisterActivityObserver(nsISupports* aSupports); + bool UnregisterActivityObserver(nsISupports* aSupports); + // Enumerate all the observers in mActivityObservers by the aEnumerator. + using ActivityObserverEnumerator = FunctionRef<void(nsISupports*)>; + void EnumerateActivityObservers(ActivityObserverEnumerator aEnumerator); + + void NotifyActivityChanged(); + + // Indicates whether mAnimationController has been (lazily) initialized. + // If this returns true, we're promising that GetAnimationController() + // will have a non-null return value. + bool HasAnimationController() { return !!mAnimationController; } + + // Getter for this document's SMIL Animation Controller. Performs lazy + // initialization, if this document supports animation and if + // mAnimationController isn't yet initialized. + // + // If HasAnimationController is true, this is guaranteed to return non-null. + SMILAnimationController* GetAnimationController(); + + // Gets the tracker for scroll-driven animations that are waiting to start. + // Returns nullptr if there is no scroll-driven animation tracker for this + // document which will be the case if there have never been any scroll-driven + // animations in the document. + ScrollTimelineAnimationTracker* GetScrollTimelineAnimationTracker() { + return mScrollTimelineAnimationTracker; + } + + // Gets the tracker for scroll-driven animations that are waiting to start and + // creates it if it doesn't already exist. As a result, the return value + // will never be nullptr. + ScrollTimelineAnimationTracker* GetOrCreateScrollTimelineAnimationTracker(); + + /** + * Prevents user initiated events from being dispatched to the document and + * subdocuments. + */ + void SuppressEventHandling(uint32_t aIncrease = 1); + + /** + * Unsuppress event handling. + * @param aFireEvents If true, delayed events (focus/blur) will be fired + * asynchronously. + */ + MOZ_CAN_RUN_SCRIPT_BOUNDARY void UnsuppressEventHandlingAndFireEvents( + bool aFireEvents); + + uint32_t EventHandlingSuppressed() const { return mEventsSuppressed; } + + bool IsEventHandlingEnabled() const { + return !EventHandlingSuppressed() && mScriptGlobalObject; + } + + bool WouldScheduleFrameRequestCallbacks() const { + // If this function changes to depend on some other variable, make sure to + // call UpdateFrameRequestCallbackSchedulingState() calls to the places + // where that variable can change. + return mPresShell && IsEventHandlingEnabled(); + } + + void DecreaseEventSuppression() { + MOZ_ASSERT(mEventsSuppressed); + --mEventsSuppressed; + UpdateFrameRequestCallbackSchedulingState(); + } + + /** + * Some clipboard commands are unconditionally enabled on some documents, so + * as to always dispatch copy / paste events even though you'd normally not be + * able to copy. + */ + bool AreClipboardCommandsUnconditionallyEnabled() const; + + /** + * Note a ChannelEventQueue which has been suspended on the document's behalf + * to prevent XHRs from running content scripts while event handling is + * suppressed. The document is responsible for resuming the queue after + * event handling is unsuppressed. + */ + void AddSuspendedChannelEventQueue(net::ChannelEventQueue* aQueue); + + /** + * Returns true if a postMessage event should be suspended instead of running. + * The document is responsible for running the event later, in the order they + * were received. + */ + bool SuspendPostMessageEvent(PostMessageEvent* aEvent); + + /** + * Run any suspended postMessage events, or clear them. + */ + void FireOrClearPostMessageEvents(bool aFireEvents); + + void SetHasDelayedRefreshEvent() { mHasDelayedRefreshEvent = true; } + + /** + * Flag whether we're about to fire the window's load event for this document. + */ + void SetLoadEventFiring(bool aFiring) { mLoadEventFiring = aFiring; } + + /** + * Test whether we should be firing a load event for this document after a + * document.close(). This is public and on Document, instead of being private + * to Document, because we need to go through the normal docloader logic + * for the readystate change to READYSTATE_COMPLETE with the normal timing and + * semantics of firing the load event; we just don't want to fire the load + * event if this tests true. So we need the docloader to be able to access + * this state. + * + * This method should only be called at the point when the load event is about + * to be fired. It resets the "skip" flag, so it is not idempotent. + */ + bool SkipLoadEventAfterClose() { + bool skip = mSkipLoadEventAfterClose; + mSkipLoadEventAfterClose = false; + return skip; + } + + /** + * Increment https://html.spec.whatwg.org/#ignore-destructive-writes-counter + */ + void IncrementIgnoreDestructiveWritesCounter() { + ++mIgnoreDestructiveWritesCounter; + } + + /** + * Decrement https://html.spec.whatwg.org/#ignore-destructive-writes-counter + */ + void DecrementIgnoreDestructiveWritesCounter() { + --mIgnoreDestructiveWritesCounter; + } + + bool IsDNSPrefetchAllowed() const { return mAllowDNSPrefetch; } + + /** + * Returns true if this document is allowed to contain XUL element and + * use non-builtin XBL bindings. + */ + bool AllowXULXBL() { + return mAllowXULXBL == eTriTrue ? true + : mAllowXULXBL == eTriFalse ? false + : InternalAllowXULXBL(); + } + + /** + * Returns true if this document is allowed to load DTDs from UI resources + * no matter what. + */ + bool SkipDTDSecurityChecks() { return mSkipDTDSecurityChecks; } + + void ForceEnableXULXBL() { mAllowXULXBL = eTriTrue; } + + void ForceSkipDTDSecurityChecks() { mSkipDTDSecurityChecks = true; } + + /** + * Returns the template content owner document that owns the content of + * HTMLTemplateElement. + */ + Document* GetTemplateContentsOwner(); + + Document* GetTemplateContentsOwnerIfExists() const { + return mTemplateContentsOwner.get(); + } + + bool IsTemplateContentsOwner() const { + // Template contents owner documents are the template contents owner of + // themselves. + return mTemplateContentsOwner == this; + } + + /** + * Returns true if this document is a static clone of a normal document. + * + * We create static clones for print preview and printing (possibly other + * things in future). + * + * Note that static documents are also "loaded as data" (if this method + * returns true, IsLoadedAsData() will also return true). + */ + bool IsStaticDocument() const { return mIsStaticDocument; } + + /** + * Clones the document along with any subdocuments, stylesheet, etc. + * + * The resulting document and everything it contains (including any + * sub-documents) are created purely via cloning. The returned documents and + * any sub-documents are "loaded as data" documents to preserve the state as + * it was during the clone process (we don't want external resources to load + * and replace the cloned resources). + * + * @param aCloneContainer The container for the clone document. + * @param aDocumentViewer The viewer for the clone document. Must be the + * viewer of aCloneContainer, but callers must have a + * reference to it already and ensure it's not null. + * @param aPrintSettings The print settings for this clone. + * @param aOutHasInProcessPrintCallbacks Self-descriptive. + */ + already_AddRefed<Document> CreateStaticClone( + nsIDocShell* aCloneContainer, nsIDocumentViewer* aDocumentViewer, + nsIPrintSettings* aPrintSettings, bool* aOutHasInProcessPrintCallbacks); + + /** + * If this document is a static clone, this returns the original + * document. + */ + Document* GetOriginalDocument() const { + MOZ_ASSERT(!mOriginalDocument || !mOriginalDocument->GetOriginalDocument()); + return mOriginalDocument; + } + + /** + * If this document is a static clone, let the original document know that + * we're going away and then release our reference to it. + */ + void UnlinkOriginalDocumentIfStatic(); + + /** + * These are called by the parser as it encounters <picture> tags, the end of + * said tags, and possible picture <source srcset> sources respectively. These + * are used to inform ResolvePreLoadImage() calls. Unset attributes are + * expected to be marked void. + * + * NOTE that the parser does not attempt to track the current picture nesting + * level or whether the given <source> tag is within a picture -- it is only + * guaranteed to order these calls properly with respect to + * ResolvePreLoadImage. + */ + + void PreloadPictureOpened() { mPreloadPictureDepth++; } + + void PreloadPictureClosed(); + + void PreloadPictureImageSource(const nsAString& aSrcsetAttr, + const nsAString& aSizesAttr, + const nsAString& aTypeAttr, + const nsAString& aMediaAttr); + + /** + * Called by the parser to resolve an image for preloading. The parser will + * call the PreloadPicture* functions to inform us of possible <picture> + * nesting and possible sources, which are used to inform URL selection + * responsive <picture> or <img srcset> images. Unset attributes are expected + * to be marked void. + * If this image is for <picture> or <img srcset>, aIsImgSet will be set to + * true, false otherwise. + */ + already_AddRefed<nsIURI> ResolvePreloadImage(nsIURI* aBaseURI, + const nsAString& aSrcAttr, + const nsAString& aSrcsetAttr, + const nsAString& aSizesAttr, + bool* aIsImgSet); + /** + * Called by nsParser to preload images. Can be removed and code moved + * to nsPreloadURIs::PreloadURIs() in file nsParser.cpp whenever the + * parser-module is linked with gklayout-module. aCrossOriginAttr should + * be a void string if the attr is not present. + * aIsImgSet is the value got from calling ResolvePreloadImage, it is true + * when this image is for loading <picture> or <img srcset> images. + */ + void MaybePreLoadImage(nsIURI* uri, const nsAString& aCrossOriginAttr, + ReferrerPolicyEnum aReferrerPolicy, bool aIsImgSet, + bool aLinkPreload); + void PreLoadImage(nsIURI* uri, const nsAString& aCrossOriginAttr, + ReferrerPolicyEnum aReferrerPolicy, bool aIsImgSet, + bool aLinkPreload, uint64_t aEarlyHintPreloaderId); + + /** + * Called by images to forget an image preload when they start doing + * the real load. + */ + void ForgetImagePreload(nsIURI* aURI); + + /** + * Called by the parser or the preload service to preload style sheets. + * aCrossOriginAttr should be a void string if the attr is not present. + */ + SheetPreloadStatus PreloadStyle(nsIURI* aURI, const Encoding* aEncoding, + const nsAString& aCrossOriginAttr, + ReferrerPolicyEnum aReferrerPolicy, + const nsAString& aNonce, + const nsAString& aIntegrity, + css::StylePreloadKind, + uint64_t aEarlyHintPreloaderId, + const nsAString& aFetchPriority); + + /** + * Called by the chrome registry to load style sheets. + * + * This always does a synchronous load, and parses as a normal document sheet. + */ + RefPtr<StyleSheet> LoadChromeSheetSync(nsIURI* aURI); + + /** + * Returns true if the locale used for the document specifies a direction of + * right to left. For chrome documents, this comes from the chrome registry. + * This is used to determine the current state for the :-moz-locale-dir + * pseudoclass so once can know whether a document is expected to be rendered + * left-to-right or right-to-left. + */ + bool IsDocumentRightToLeft(); + + /** + * Called by Parser for link rel=preconnect + */ + void MaybePreconnect(nsIURI* uri, CORSMode aCORSMode); + + /** + * Set the document's pending state object (as serialized using structured + * clone). + */ + void SetStateObject(nsIStructuredCloneContainer* scContainer); + + /** + * Set the document's pending state object to the same state object as + * aDocument. + */ + void SetStateObjectFrom(Document* aDocument) { + SetStateObject(aDocument->mStateObjectContainer); + } + + /** + * Returns true if there is a lightweight theme specified. This is used to + * determine the state of the :-moz-lwtheme pseudo-class. + */ + bool ComputeDocumentLWTheme() const; + void ResetDocumentLWTheme() { + UpdateDocumentStates(DocumentState::LWTHEME, true); + } + + // Whether we're a media document or not. + enum class MediaDocumentKind { + NotMedia, + Video, + Image, + Plugin, + }; + + virtual enum MediaDocumentKind MediaDocumentKind() const { + return MediaDocumentKind::NotMedia; + } + + DocumentState State() const { return mState; } + + nsISupports* GetCurrentContentSink(); + + void ElementWithAutoFocusInserted(Element* aAutoFocusCandidate); + MOZ_CAN_RUN_SCRIPT void FlushAutoFocusCandidates(); + void ScheduleFlushAutoFocusCandidates(); + bool HasAutoFocusCandidates() const { + return !mAutoFocusCandidates.IsEmpty(); + } + + void SetAutoFocusFired(); + + void SetScrollToRef(nsIURI* aDocumentURI); + MOZ_CAN_RUN_SCRIPT void ScrollToRef(); + void ResetScrolledToRefAlready() { mScrolledToRefAlready = false; } + + void SetChangeScrollPosWhenScrollingToRef(bool aValue) { + mChangeScrollPosWhenScrollingToRef = aValue; + } + + using DocumentOrShadowRoot::GetElementById; + using DocumentOrShadowRoot::GetElementsByClassName; + using DocumentOrShadowRoot::GetElementsByTagName; + using DocumentOrShadowRoot::GetElementsByTagNameNS; + + DocumentTimeline* Timeline(); + LinkedList<DocumentTimeline>& Timelines() { return mTimelines; } + void UpdateHiddenByContentVisibilityForAnimations(); + + SVGSVGElement* GetSVGRootElement() const; + + nsresult ScheduleFrameRequestCallback(FrameRequestCallback& aCallback, + int32_t* aHandle); + void CancelFrameRequestCallback(int32_t aHandle); + + /** + * Returns true if the handle refers to a callback that was canceled that + * we did not find in our list of callbacks (e.g. because it is one of those + * in the set of callbacks currently queued to be run). + */ + bool IsCanceledFrameRequestCallback(int32_t aHandle) const; + + /** + * Put this document's frame request callbacks into the provided + * list, and forget about them. + */ + void TakeFrameRequestCallbacks(nsTArray<FrameRequest>& aCallbacks); + + /** + * @return true if this document's frame request callbacks should be + * throttled. We throttle requestAnimationFrame for documents which aren't + * visible (e.g. scrolled out of the viewport). + */ + bool ShouldThrottleFrameRequests() const; + + // This returns true when the document tree is being teared down. + bool InUnlinkOrDeletion() { return mInUnlinkOrDeletion; } + + dom::ImageTracker* ImageTracker(); + + // Adds an element to mResponsiveContent when the element is + // added to the tree. + void AddResponsiveContent(HTMLImageElement* aContent) { + MOZ_ASSERT(aContent); + mResponsiveContent.Insert(aContent); + } + + // Removes an element from mResponsiveContent when the element is + // removed from the tree. + void RemoveResponsiveContent(HTMLImageElement* aContent) { + MOZ_ASSERT(aContent); + mResponsiveContent.Remove(aContent); + } + + void ScheduleSVGUseElementShadowTreeUpdate(SVGUseElement&); + void UnscheduleSVGUseElementShadowTreeUpdate(SVGUseElement& aElement) { + mSVGUseElementsNeedingShadowTreeUpdate.Remove(&aElement); + } + + bool SVGUseElementNeedsShadowTreeUpdate(SVGUseElement& aElement) const { + return mSVGUseElementsNeedingShadowTreeUpdate.Contains(&aElement); + } + + using ShadowRootSet = nsTHashSet<ShadowRoot*>; + + void AddComposedDocShadowRoot(ShadowRoot& aShadowRoot) { + mComposedShadowRoots.Insert(&aShadowRoot); + } + + void RemoveComposedDocShadowRoot(ShadowRoot& aShadowRoot) { + mComposedShadowRoots.Remove(&aShadowRoot); + } + + // If you're considering using this, you probably want to use + // ShadowRoot::IsComposedDocParticipant instead. This is just for + // sanity-checking. + bool IsComposedDocShadowRoot(ShadowRoot& aShadowRoot) { + return mComposedShadowRoots.Contains(&aShadowRoot); + } + + const ShadowRootSet& ComposedShadowRoots() const { + return mComposedShadowRoots; + } + + // WebIDL method for chrome code. + void GetConnectedShadowRoots(nsTArray<RefPtr<ShadowRoot>>&) const; + + // Notifies any responsive content added by AddResponsiveContent upon media + // features values changing. + void NotifyMediaFeatureValuesChanged(); + + nsresult GetStateObject(JS::MutableHandle<JS::Value> aState); + + nsDOMNavigationTiming* GetNavigationTiming() const { return mTiming; } + + void SetNavigationTiming(nsDOMNavigationTiming* aTiming); + + nsContentList* ImageMapList(); + + // Add aLink to the set of links that need their status resolved. + void RegisterPendingLinkUpdate(Link* aLink); + + // Update state on links in mLinksToUpdate. + void FlushPendingLinkUpdates(); + + bool HasWarnedAbout(DeprecatedOperations aOperation) const; + void WarnOnceAbout( + DeprecatedOperations aOperation, bool asError = false, + const nsTArray<nsString>& aParams = nsTArray<nsString>()) const; + +#define DOCUMENT_WARNING(_op) e##_op, + enum DocumentWarnings { +#include "nsDocumentWarningList.h" + eDocumentWarningCount + }; +#undef DOCUMENT_WARNING + bool HasWarnedAbout(DocumentWarnings aWarning) const; + void WarnOnceAbout( + DocumentWarnings aWarning, bool asError = false, + const nsTArray<nsString>& aParams = nsTArray<nsString>()) const; + + // This method may fire a DOM event; if it does so it will happen + // synchronously. + // + // Whether the event fires is controlled by the argument. + enum class DispatchVisibilityChange { No, Yes }; + void UpdateVisibilityState( + DispatchVisibilityChange = DispatchVisibilityChange::Yes); + + // Posts an event to call UpdateVisibilityState. + void PostVisibilityUpdateEvent(); + + bool IsSyntheticDocument() const { return mIsSyntheticDocument; } + + // Adds the size of a given node, which must not be a document node, to the + // window sizes passed-in. + static void AddSizeOfNodeTree(nsINode&, nsWindowSizes&); + + // Note: Document is a sub-class of nsINode, which has a + // SizeOfExcludingThis function. However, because Document objects can + // only appear at the top of the DOM tree, we have a specialized measurement + // function which returns multiple sizes. + virtual void DocAddSizeOfExcludingThis(nsWindowSizes& aWindowSizes) const; + // DocAddSizeOfIncludingThis doesn't need to be overridden by sub-classes + // because Document inherits from nsINode; see the comment above the + // declaration of nsINode::SizeOfIncludingThis. + virtual void DocAddSizeOfIncludingThis(nsWindowSizes& aWindowSizes) const; + + void ConstructUbiNode(void* storage) override; + + bool MayHaveDOMMutationObservers() { return mMayHaveDOMMutationObservers; } + + void SetMayHaveDOMMutationObservers() { mMayHaveDOMMutationObservers = true; } + + bool MayHaveAnimationObservers() { return mMayHaveAnimationObservers; } + + void SetMayHaveAnimationObservers() { mMayHaveAnimationObservers = true; } + + bool IsInSyncOperation() { return mInSyncOperationCount != 0; } + + void SetIsInSyncOperation(bool aSync); + + bool CreatingStaticClone() const { return mCreatingStaticClone; } + + /** + * Creates a new element in the HTML namespace with a local name given by + * aTag. + */ + already_AddRefed<Element> CreateHTMLElement(nsAtom* aTag); + + // WebIDL API + nsIGlobalObject* GetParentObject() const { return GetScopeObject(); } + static already_AddRefed<Document> Constructor(const GlobalObject& aGlobal, + ErrorResult& rv); + DOMImplementation* GetImplementation(ErrorResult& rv); + [[nodiscard]] nsresult GetURL(nsString& retval) const; + [[nodiscard]] nsresult GetDocumentURI(nsString& retval) const; + // Return the URI for the document. + // The returned value may differ if the document is loaded via XHR, and + // when accessed from chrome privileged script and + // from content privileged script for compatibility. + void GetDocumentURIFromJS(nsString& aDocumentURI, CallerType aCallerType, + ErrorResult& aRv) const; + void GetCompatMode(nsString& retval) const; + void GetCharacterSet(nsAString& retval) const; + // Skip GetContentType, because our NS_IMETHOD version above works fine here. + // GetDoctype defined above + Element* GetDocumentElement() const { return GetRootElement(); } + + WindowContext* GetTopLevelWindowContext() const; + + // If the top-level ancestor content document for this document is in the same + // process, returns it. Otherwise, returns null. This function is not + // Fission-compatible, and should not be used in new code. + Document* GetTopLevelContentDocumentIfSameProcess(); + const Document* GetTopLevelContentDocumentIfSameProcess() const; + + // Returns the associated app window if this is a top-level chrome document, + // null otherwise. + already_AddRefed<nsIAppWindow> GetAppWindowIfToplevelChrome() const; + + already_AddRefed<Element> CreateElement( + const nsAString& aTagName, const ElementCreationOptionsOrString& aOptions, + ErrorResult& rv); + already_AddRefed<Element> CreateElementNS( + const nsAString& aNamespaceURI, const nsAString& aQualifiedName, + const ElementCreationOptionsOrString& aOptions, ErrorResult& rv); + already_AddRefed<Element> CreateXULElement( + const nsAString& aTagName, const ElementCreationOptionsOrString& aOptions, + ErrorResult& aRv); + already_AddRefed<DocumentFragment> CreateDocumentFragment() const; + already_AddRefed<nsTextNode> CreateTextNode(const nsAString& aData) const; + already_AddRefed<nsTextNode> CreateEmptyTextNode() const; + already_AddRefed<Comment> CreateComment(const nsAString& aData) const; + already_AddRefed<ProcessingInstruction> CreateProcessingInstruction( + const nsAString& target, const nsAString& data, ErrorResult& rv) const; + already_AddRefed<nsINode> ImportNode(nsINode& aNode, bool aDeep, + ErrorResult& rv) const; + // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230) + MOZ_CAN_RUN_SCRIPT_BOUNDARY nsINode* AdoptNode( + nsINode& aAdoptedNode, ErrorResult& rv, bool aAcceptShadowRoot = false); + already_AddRefed<Event> CreateEvent(const nsAString& aEventType, + CallerType aCallerType, + ErrorResult& rv) const; + already_AddRefed<nsRange> CreateRange(ErrorResult& rv); + already_AddRefed<NodeIterator> CreateNodeIterator(nsINode& aRoot, + uint32_t aWhatToShow, + NodeFilter* aFilter, + ErrorResult& rv) const; + already_AddRefed<TreeWalker> CreateTreeWalker(nsINode& aRoot, + uint32_t aWhatToShow, + NodeFilter* aFilter, + ErrorResult& rv) const; + // Deprecated WebIDL bits + already_AddRefed<CDATASection> CreateCDATASection(const nsAString& aData, + ErrorResult& rv); + already_AddRefed<Attr> CreateAttribute(const nsAString& aName, + ErrorResult& rv); + already_AddRefed<Attr> CreateAttributeNS(const nsAString& aNamespaceURI, + const nsAString& aQualifiedName, + ErrorResult& rv); + void GetInputEncoding(nsAString& aInputEncoding) const; + already_AddRefed<Location> GetLocation() const; + void GetDomain(nsAString& aDomain); + void SetDomain(const nsAString& aDomain, mozilla::ErrorResult& rv); + void GetCookie(nsAString& aCookie, mozilla::ErrorResult& rv); + void SetCookie(const nsAString& aCookie, mozilla::ErrorResult& rv); + void GetReferrer(nsAString& aReferrer) const; + void GetLastModified(nsAString& aLastModified) const; + void GetReadyState(nsAString& aReadyState) const; + + void GetTitle(nsAString& aTitle); + void SetTitle(const nsAString& aTitle, ErrorResult& rv); + void GetDir(nsAString& aDirection) const; + void SetDir(const nsAString& aDirection); + nsIHTMLCollection* Images(); + nsIHTMLCollection* Embeds(); + nsIHTMLCollection* Plugins() { return Embeds(); } + nsIHTMLCollection* Links(); + nsIHTMLCollection* Forms(); + nsIHTMLCollection* Scripts(); + already_AddRefed<nsContentList> GetElementsByName(const nsAString& aName) { + return GetFuncStringContentList<nsCachableElementsByNameNodeList>( + this, MatchNameAttribute, nullptr, UseExistingNameString, aName); + } + Document* Open(const mozilla::dom::Optional<nsAString>& /* unused */, + const mozilla::dom::Optional<nsAString>& /* unused */, + mozilla::ErrorResult& aError); + mozilla::dom::Nullable<mozilla::dom::WindowProxyHolder> Open( + const nsAString& aURL, const nsAString& aName, const nsAString& aFeatures, + mozilla::ErrorResult& rv); + void Close(mozilla::ErrorResult& rv); + void Write(const mozilla::dom::Sequence<nsString>& aText, + mozilla::ErrorResult& rv); + void Writeln(const mozilla::dom::Sequence<nsString>& aText, + mozilla::ErrorResult& rv); + Nullable<WindowProxyHolder> GetDefaultView() const; + Element* GetActiveElement(); + enum class IncludeChromeOnly : bool { No, Yes }; + // TODO(emilio): Audit callers and remove the default argument, some seem like + // they could want the IncludeChromeOnly::Yes version. + nsIContent* GetUnretargetedFocusedContent( + IncludeChromeOnly = IncludeChromeOnly::No) const; + /** + * Return true if this document or a subdocument has focus. + */ + bool HasFocus(ErrorResult& rv) const; + + /** + * Return true if this document itself has focus. + */ + bool ThisDocumentHasFocus() const; + + void GetDesignMode(nsAString& aDesignMode); + void SetDesignMode(const nsAString& aDesignMode, + nsIPrincipal& aSubjectPrincipal, mozilla::ErrorResult& rv); + void SetDesignMode(const nsAString& aDesignMode, + const mozilla::Maybe<nsIPrincipal*>& aSubjectPrincipal, + mozilla::ErrorResult& rv); + MOZ_CAN_RUN_SCRIPT + bool ExecCommand(const nsAString& aHTMLCommandName, bool aShowUI, + const nsAString& aValue, nsIPrincipal& aSubjectPrincipal, + mozilla::ErrorResult& aRv); + MOZ_CAN_RUN_SCRIPT bool QueryCommandEnabled(const nsAString& aHTMLCommandName, + nsIPrincipal& aSubjectPrincipal, + mozilla::ErrorResult& aRv); + MOZ_CAN_RUN_SCRIPT bool QueryCommandIndeterm( + const nsAString& aHTMLCommandName, mozilla::ErrorResult& aRv); + MOZ_CAN_RUN_SCRIPT bool QueryCommandState(const nsAString& aHTMLCommandName, + mozilla::ErrorResult& aRv); + MOZ_CAN_RUN_SCRIPT bool QueryCommandSupported( + const nsAString& aHTMLCommandName, mozilla::dom::CallerType aCallerType, + mozilla::ErrorResult& aRv); + MOZ_CAN_RUN_SCRIPT void QueryCommandValue(const nsAString& aHTMLCommandName, + nsAString& aValue, + mozilla::ErrorResult& aRv); + nsIHTMLCollection* Applets(); + nsIHTMLCollection* Anchors(); + TimeStamp LastFocusTime() const; + void SetLastFocusTime(const TimeStamp& aFocusTime); + // Event handlers are all on nsINode already + bool MozSyntheticDocument() const { return IsSyntheticDocument(); } + Element* GetCurrentScript(); + void ReleaseCapture() const; + void MozSetImageElement(const nsAString& aImageElementId, Element* aElement); + nsIURI* GetDocumentURIObject() const; + // Not const because all the fullscreen goop is not const + const char* GetFullscreenError(CallerType); + bool FullscreenEnabled(CallerType aCallerType) { + return !GetFullscreenError(aCallerType); + } + + void GetWireframeWithoutFlushing(bool aIncludeNodes, Nullable<Wireframe>&); + + MOZ_CAN_RUN_SCRIPT void GetWireframe(bool aIncludeNodes, + Nullable<Wireframe>&); + + // Hides all popovers until the given end point, see + // https://html.spec.whatwg.org/multipage/popover.html#hide-all-popovers-until + MOZ_CAN_RUN_SCRIPT void HideAllPopoversUntil(nsINode& aEndpoint, + bool aFocusPreviousElement, + bool aFireEvents); + + MOZ_CAN_RUN_SCRIPT_BOUNDARY void HideAllPopoversWithoutRunningScript(); + // Hides the given popover element, see + // https://html.spec.whatwg.org/multipage/popover.html#hide-popover-algorithm + MOZ_CAN_RUN_SCRIPT void HidePopover(Element& popover, + bool aFocusPreviousElement, + bool aFireEvents, ErrorResult& aRv); + + // Returns a list of all the elements in the Document's top layer whose + // popover attribute is in the auto state. + // See https://html.spec.whatwg.org/multipage/popover.html#auto-popover-list + nsTArray<Element*> AutoPopoverList() const; + + // Return document's auto popover list's last element. + // See + // https://html.spec.whatwg.org/multipage/popover.html#topmost-auto-popover + Element* GetTopmostAutoPopover() const; + + // Adds/removes an element to/from the auto popover list. + void AddToAutoPopoverList(Element&); + void RemoveFromAutoPopoverList(Element&); + + void AddPopoverToTopLayer(Element&); + void RemovePopoverFromTopLayer(Element&); + + Element* GetTopLayerTop(); + // Return the fullscreen element in the top layer + Element* GetUnretargetedFullscreenElement() const; + bool Fullscreen() const { return !!GetUnretargetedFullscreenElement(); } + already_AddRefed<Promise> ExitFullscreen(ErrorResult&); + void ExitPointerLock() { PointerLockManager::Unlock(this); } + void GetFgColor(nsAString& aFgColor); + void SetFgColor(const nsAString& aFgColor); + void GetLinkColor(nsAString& aLinkColor); + void SetLinkColor(const nsAString& aLinkColor); + void GetVlinkColor(nsAString& aAvlinkColor); + void SetVlinkColor(const nsAString& aVlinkColor); + void GetAlinkColor(nsAString& aAlinkColor); + void SetAlinkColor(const nsAString& aAlinkColor); + void GetBgColor(nsAString& aBgColor); + void SetBgColor(const nsAString& aBgColor); + void Clear() const { + // Deprecated + } + void CaptureEvents(); + void ReleaseEvents(); + + mozilla::dom::HTMLAllCollection* All(); + + static bool DocumentSupportsL10n(JSContext* aCx, JSObject* aObject); + static bool AreWebAnimationsTimelinesEnabled(JSContext* aCx, + JSObject* aObject); + // Checks that the caller is either chrome or some addon. + static bool IsCallerChromeOrAddon(JSContext* aCx, JSObject* aObject); + + bool Hidden() const { return mVisibilityState != VisibilityState::Visible; } + dom::VisibilityState VisibilityState() const { return mVisibilityState; } + + public: + void GetSelectedStyleSheetSet(nsAString& aSheetSet); + void SetSelectedStyleSheetSet(const nsAString& aSheetSet); + void GetLastStyleSheetSet(nsAString& aSheetSet) { + aSheetSet = mLastStyleSheetSet; + } + const nsString& GetCurrentStyleSheetSet() const { + return mLastStyleSheetSet.IsEmpty() ? mPreferredStyleSheetSet + : mLastStyleSheetSet; + } + void SetPreferredStyleSheetSet(const nsAString&); + void GetPreferredStyleSheetSet(nsAString& aSheetSet) { + aSheetSet = mPreferredStyleSheetSet; + } + DOMStringList* StyleSheetSets(); + void EnableStyleSheetsForSet(const nsAString& aSheetSet); + + /** + * Retrieve the location of the caret position (DOM node and character + * offset within that node), given a point. + * + * @param aX Horizontal point at which to determine the caret position, in + * page coordinates. + * @param aY Vertical point at which to determine the caret position, in + * page coordinates. + */ + already_AddRefed<nsDOMCaretPosition> CaretPositionFromPoint(float aX, + float aY); + + Element* GetScrollingElement(); + // A way to check whether a given element is what would get returned from + // GetScrollingElement. It can be faster than comparing to the return value + // of GetScrollingElement() due to being able to avoid flushes in various + // cases. This method assumes that null is NOT passed. + bool IsScrollingElement(Element* aElement); + + // QuerySelector and QuerySelectorAll already defined on nsINode + + UniquePtr<XPathExpression> CreateExpression(const nsAString& aExpression, + XPathNSResolver* aResolver, + ErrorResult& rv); + nsINode* CreateNSResolver(nsINode& aNodeResolver); + already_AddRefed<XPathResult> Evaluate( + JSContext* aCx, const nsAString& aExpression, nsINode& aContextNode, + XPathNSResolver* aResolver, uint16_t aType, JS::Handle<JSObject*> aResult, + ErrorResult& rv); + // Touch event handlers already on nsINode + already_AddRefed<Touch> CreateTouch(nsGlobalWindowInner* aView, + EventTarget* aTarget, int32_t aIdentifier, + int32_t aPageX, int32_t aPageY, + int32_t aScreenX, int32_t aScreenY, + int32_t aClientX, int32_t aClientY, + int32_t aRadiusX, int32_t aRadiusY, + float aRotationAngle, float aForce); + already_AddRefed<TouchList> CreateTouchList(); + already_AddRefed<TouchList> CreateTouchList( + Touch& aTouch, const Sequence<OwningNonNull<Touch>>& aTouches); + already_AddRefed<TouchList> CreateTouchList( + const Sequence<OwningNonNull<Touch>>& aTouches); + + void SetStyleSheetChangeEventsEnabled(bool aValue) { + mStyleSheetChangeEventsEnabled = aValue; + } + + bool StyleSheetChangeEventsEnabled() const { + return mStyleSheetChangeEventsEnabled; + } + + void SetDevToolsAnonymousAndShadowEventsEnabled(bool aValue) { + mDevToolsAnonymousAndShadowEventsEnabled = aValue; + } + bool DevToolsAnonymousAndShadowEventsEnabled() const { + return mDevToolsAnonymousAndShadowEventsEnabled; + } + + already_AddRefed<Promise> BlockParsing(Promise& aPromise, + const BlockParsingOptions& aOptions, + ErrorResult& aRv); + + already_AddRefed<nsIURI> GetMozDocumentURIIfNotForErrorPages(); + + Promise* GetDocumentReadyForIdle(ErrorResult& aRv); + + void BlockUnblockOnloadForSystemOrPDFJS(bool aBlock) { + if (aBlock) { + BlockOnload(); + } else { + UnblockOnload(/* aFireSync = */ false); + } + } + + nsIDOMXULCommandDispatcher* GetCommandDispatcher(); + bool HasXULBroadcastManager() const { return mXULBroadcastManager; }; + void InitializeXULBroadcastManager(); + XULBroadcastManager* GetXULBroadcastManager() const { + return mXULBroadcastManager; + } + nsINode* GetPopupRangeParent(ErrorResult& aRv); + int32_t GetPopupRangeOffset(ErrorResult& aRv); + + bool DevToolsWatchingDOMMutations() const { + return mDevToolsWatchingDOMMutations; + } + void SetDevToolsWatchingDOMMutations(bool aValue); + + void MaybeWarnAboutZoom(); + + // https://drafts.csswg.org/cssom-view/#evaluate-media-queries-and-report-changes + void EvaluateMediaQueriesAndReportChanges(bool aRecurse); + + nsTHashSet<RefPtr<WakeLockSentinel>>& ActiveWakeLocks(WakeLockType aType); + + void UnlockAllWakeLocks(WakeLockType aType); + + // ParentNode + nsIHTMLCollection* Children(); + uint32_t ChildElementCount(); + + /** + * Asserts IsHTMLOrXHTML, and can't return null. + * Defined inline in nsHTMLDocument.h + */ + inline nsHTMLDocument* AsHTMLDocument(); + inline const nsHTMLDocument* AsHTMLDocument() const; + + /** + * Asserts IsSVGDocument, and can't return null. + * Defined inline in SVGDocument.h + */ + inline SVGDocument* AsSVGDocument(); + inline const SVGDocument* AsSVGDocument() const; + + /** + * Asserts IsImageDocument, and can't return null. + * Defined inline in ImageDocument.h + */ + inline ImageDocument* AsImageDocument(); + inline const ImageDocument* AsImageDocument() const; + + gfxUserFontSet* GetUserFontSet(); + void FlushUserFontSet(); + void MarkUserFontSetDirty(); + FontFaceSet* GetFonts() { return mFontFaceSet; } + + // FontFaceSource + FontFaceSet* GetFonts(ErrorResult&) { return Fonts(); } + FontFaceSet* Fonts(); + + bool DidFireDOMContentLoaded() const { return mDidFireDOMContentLoaded; } + + bool IsSynthesized(); + + // Records whether we will track use counters for this document, and if so, + // which top-level document that page counters will be accumulated to. + // + // Informs the parent process that page use counters will be sent once the + // document goes away. + void InitUseCounters(); + + // Reports document use counters via telemetry. This method only has an + // effect once per document, and so is called during document destruction. + void ReportDocumentUseCounters(); + + // Reports largest contentful paint via telemetry. We want the most up to + // date value for LCP and so this is called during document destruction. + void ReportLCP(); + + // Report how lazyload performs for this document. + void ReportDocumentLazyLoadCounters(); + + // Sends page use counters to the parent process to accumulate against the + // top-level document. Must be called while we still have access to our + // WindowContext. This method has an effect each time it is called, and we + // call it just before the document loses its window. + void SendPageUseCounters(); + + void SetUseCounter(UseCounter aUseCounter) { + mUseCounters[aUseCounter] = true; + } + + const StyleUseCounters* GetStyleUseCounters() { + return mStyleUseCounters.get(); + } + + // Propagate our use counters explicitly into the specified referencing + // document. + // + // This is used for SVG image documents, which cannot be enumerated in the + // referencing document's ReportUseCounters() like external resource documents + // can. + void PropagateImageUseCounters(Document* aReferencingDocument); + + // Called to track whether this document has had any interaction. + // This is used to track whether we should permit "beforeunload". + void SetUserHasInteracted(); + bool UserHasInteracted() { return mUserHasInteracted; } + void ResetUserInteractionTimer(); + + // Whether we're cloning the contents of an SVG use element. + bool CloningForSVGUse() const { return mCloningForSVGUse; } + + // This should be called when this document receives events which are likely + // to be user interaction with the document, rather than the byproduct of + // interaction with the browser (i.e. a keypress to scroll the view port, + // keyboard shortcuts, etc). This is used to decide whether we should + // permit autoplay audible media. This also gesture activates all other + // content documents in this tab. + void NotifyUserGestureActivation( + UserActivation::Modifiers aModifiers = UserActivation::Modifiers::None()); + + // This function is used for mochitest only. + void ClearUserGestureActivation(); + + // Return true if NotifyUserGestureActivation() has been called on any + // document in the document tree. + bool HasBeenUserGestureActivated(); + + // Reture timestamp of last user gesture in milliseconds relative to + // navigation start timestamp. + DOMHighResTimeStamp LastUserGestureTimeStamp(); + + // Return true if there is transient user gesture activation and it hasn't yet + // timed out or hasn't been consumed. + bool HasValidTransientUserGestureActivation() const; + + // Return true if HasValidTransientUserGestureActivation() would return true, + // and consume the activation. + bool ConsumeTransientUserGestureActivation(); + + bool GetTransientUserGestureActivationModifiers( + UserActivation::Modifiers* aModifiers); + + BrowsingContext* GetBrowsingContext() const; + + // This document is a WebExtension page, it might be a background page, a + // popup, a visible tab, a visible iframe ...e.t.c. + bool IsExtensionPage() const; + + bool HasScriptsBlockedBySandbox() const; + + void ReportHasScrollLinkedEffect(const TimeStamp& aTimeStamp); + bool HasScrollLinkedEffect() const; + +#ifdef DEBUG + void AssertDocGroupMatchesKey() const; +#endif + + DocGroup* GetDocGroup() const { +#ifdef DEBUG + AssertDocGroupMatchesKey(); +#endif + return mDocGroup; + } + + DocGroup* GetDocGroupOrCreate(); + + /** + * If we're a sub-document, the parent document's layout can affect our style + * and layout (due to the viewport size, viewport units, media queries...). + * + * This function returns true if our parent document and our child document + * can observe each other. If they cannot, then we don't need to synchronously + * update the parent document layout every time the child document may need + * up-to-date layout information. + */ + bool StyleOrLayoutObservablyDependsOnParentDocumentLayout() const { + return GetInProcessParentDocument() && + GetDocGroup() == GetInProcessParentDocument()->GetDocGroup(); + } + + void AddIntersectionObserver(DOMIntersectionObserver* aObserver) { + MOZ_ASSERT(!mIntersectionObservers.Contains(aObserver), + "Intersection observer already in the list"); + mIntersectionObservers.Insert(aObserver); + } + + void RemoveIntersectionObserver(DOMIntersectionObserver* aObserver) { + mIntersectionObservers.Remove(aObserver); + } + + bool HasIntersectionObservers() const { + return !mIntersectionObservers.IsEmpty(); + } + + void UpdateIntersectionObservations(TimeStamp aNowTime); + void ScheduleIntersectionObserverNotification(); + MOZ_CAN_RUN_SCRIPT void NotifyIntersectionObservers(); + + DOMIntersectionObserver* GetLazyLoadObserver() { return mLazyLoadObserver; } + DOMIntersectionObserver& EnsureLazyLoadObserver(); + + ResizeObserver* GetLastRememberedSizeObserver() { + return mLastRememberedSizeObserver; + } + ResizeObserver& EnsureLastRememberedSizeObserver(); + void ObserveForLastRememberedSize(Element&); + void UnobserveForLastRememberedSize(Element&); + + // Dispatch a runnable related to the document. + nsresult Dispatch(already_AddRefed<nsIRunnable>&& aRunnable) const; + + // The URLs passed to this function should match what + // JS::DescribeScriptedCaller() returns, since this API is used to + // determine whether some code is being called from a tracking script. + void NoteScriptTrackingStatus(const nsACString& aURL, bool isTracking); + // The JSContext passed to this method represents the context that we want to + // determine if it belongs to a tracker. + bool IsScriptTracking(JSContext* aCx) const; + + // ResizeObserver usage. + void AddResizeObserver(ResizeObserver&); + void RemoveResizeObserver(ResizeObserver&); + void ScheduleResizeObserversNotification() const; + bool HasResizeObservers() const { return !mResizeObservers.IsEmpty(); } + /** + * Calls GatherActiveObservations(aDepth) for all ResizeObservers. + * All observations in each ResizeObserver with element's depth more than + * aDepth will be gathered. + */ + void GatherAllActiveResizeObservations(uint32_t aDepth); + /** + * Calls BroadcastActiveObservations() for all ResizeObservers. + * It also returns the shallowest depth of observed target elements with + * active observations from all ResizeObservers or + * numeric_limits<uint32_t>::max() if there aren't any active observations + * at all. + */ + MOZ_CAN_RUN_SCRIPT uint32_t BroadcastAllActiveResizeObservations(); + /** + * Returns whether there is any ResizeObserver that has active + * observations. + */ + bool HasAnyActiveResizeObservations() const; + /** + * Returns whether there is any ResizeObserver that has skipped observations. + */ + bool HasAnySkippedResizeObservations() const; + /** + * Determine proximity to viewport for content-visibility: auto elements and + * notify resize observers. + */ + MOZ_CAN_RUN_SCRIPT void + DetermineProximityToViewportAndNotifyResizeObservers(); + + // Getter for PermissionDelegateHandler. Performs lazy initialization. + PermissionDelegateHandler* GetPermissionDelegateHandler(); + + // Notify the document that a fetch or a XHR request has completed + // succesfully in this document. This is used by the password manager to infer + // whether a form is submitted. + void NotifyFetchOrXHRSuccess(); + + // Set whether NotifyFetchOrXHRSuccess should dispatch an event. + void SetNotifyFetchSuccess(bool aShouldNotify); + + // When this is set, removing a form or a password field from DOM + // sends a Chrome-only event. This is now only used by the password manager + // and formautofill. + void SetNotifyFormOrPasswordRemoved(bool aShouldNotify); + + // This function is used by HTMLFormElement and HTMLInputElement to determin + // whether to send an event when it is removed from DOM. + bool ShouldNotifyFormOrPasswordRemoved() const { + return mShouldNotifyFormOrPasswordRemoved; + } + + HTMLEditor* GetHTMLEditor() const; + + /** + * Localization + * + * For more information on DocumentL10n see + * intl/l10n/docs/fluent/tutorial.rst + */ + + public: + /** + * This is a public method exposed on Document WebIDL + * to chrome only documents. + */ + DocumentL10n* GetL10n() const { return mDocumentL10n.get(); } + + /** + * Whether there's any async l10n mutation work pending. + * + * When this turns false, we fire the L10nMutationsFinished event. + */ + bool HasPendingL10nMutations() const; + + /** + * This method should be called when the container + * of l10n resources parsing is completed. + * + * It triggers initial async fetch of the resources + * as early as possible. + * + * In HTML case this is </head>. + * In XUL case this is </linkset>. + */ + void OnL10nResourceContainerParsed(); + + /** + * This method should be called when a link element + * with rel="localization" is being added to the + * l10n resource container element. + */ + void LocalizationLinkAdded(Element* aLinkElement); + + /** + * This method should be called when a link element + * with rel="localization" is being removed. + */ + void LocalizationLinkRemoved(Element* aLinkElement); + + /** + * This method should be called as soon as the + * parsing of the document is completed. + * + * In HTML/XHTML this happens when we finish parsing + * the document element. + * In XUL it happens at `DoneWalking`, during + * `MozBeforeInitialXULLayout`. + */ + void OnParsingCompleted(); + + /** + * This method is called when the initial translation + * of the document is completed. + * + * It unblocks the load event if translation was blocking it. + * + * If the `aL10nCached` is set to `true`, and the document has + * a prototype, it will set the `isL10nCached` flag on it. + */ + void InitialTranslationCompleted(bool aL10nCached); + + /** + * Returns whether the document allows localization. + */ + bool AllowsL10n() const; + + void SetAllowDeclarativeShadowRoots(bool aAllowDeclarativeShadowRoots); + bool AllowsDeclarativeShadowRoots() const; + + protected: + RefPtr<DocumentL10n> mDocumentL10n; + + /** + * Return true when you want a document without explicitly specified viewport + * dimensions/scale to be treated as if "width=device-width" had in fact been + * specified. + */ + virtual bool UseWidthDeviceWidthFallbackViewport() const; + + private: + bool IsErrorPage() const; + + // Takes the bits from mStyleUseCounters if appropriate, and sets them in + // mUseCounters. + void SetCssUseCounterBits(); + + void ParseWidthAndHeightInMetaViewport(const nsAString& aWidthString, + const nsAString& aHeightString, + bool aIsAutoScale); + + // Parse scale values in viewport meta tag for a given |aHeaderField| which + // represents the scale property and returns the scale value if it's valid. + Maybe<LayoutDeviceToScreenScale> ParseScaleInHeader(nsAtom* aHeaderField); + + // Parse scale values in |aViewportMetaData| and set the values in + // mScaleMinFloat, mScaleMaxFloat and mScaleFloat respectively. + void ParseScalesInViewportMetaData(const ViewportMetaData& aViewportMetaData); + + // Get parent FeaturePolicy from container. The parent FeaturePolicy is + // stored in parent iframe or container's browsingContext (cross process) + already_AddRefed<mozilla::dom::FeaturePolicy> GetParentFeaturePolicy(); + + public: + const OriginTrials& Trials() const { return mTrials; } + + private: + void DoCacheAllKnownLangPrefs(); + void RecomputeLanguageFromCharset(); + bool GetSHEntryHasUserInteraction(); + + void AppendAutoFocusCandidateToTopDocument(Element* aAutoFocusCandidate); + + public: + void SetMayNeedFontPrefsUpdate() { mMayNeedFontPrefsUpdate = true; } + + bool MayNeedFontPrefsUpdate() { return mMayNeedFontPrefsUpdate; } + + void SetSHEntryHasUserInteraction(bool aHasInteraction); + + nsAtom* GetContentLanguageAsAtomForStyle() const; + nsAtom* GetLanguageForStyle() const; + + /** + * Fetch the user's font preferences for the given aLanguage's + * language group. + */ + const LangGroupFontPrefs* GetFontPrefsForLang( + nsAtom* aLanguage, bool* aNeedsToCache = nullptr) const; + + void ForceCacheLang(nsAtom* aLanguage) { + if (!mLanguagesUsed.EnsureInserted(aLanguage)) { + return; + } + GetFontPrefsForLang(aLanguage); + } + + void CacheAllKnownLangPrefs() { + if (!mMayNeedFontPrefsUpdate) { + return; + } + DoCacheAllKnownLangPrefs(); + } + + nsINode* GetServoRestyleRoot() const { return mServoRestyleRoot; } + + uint32_t GetServoRestyleRootDirtyBits() const { + MOZ_ASSERT(mServoRestyleRoot); + MOZ_ASSERT(mServoRestyleRootDirtyBits); + return mServoRestyleRootDirtyBits; + } + + void ClearServoRestyleRoot() { + mServoRestyleRoot = nullptr; + mServoRestyleRootDirtyBits = 0; + } + + inline void SetServoRestyleRoot(nsINode* aRoot, uint32_t aDirtyBits); + inline void SetServoRestyleRootDirtyBits(uint32_t aDirtyBits); + + bool ShouldThrowOnDynamicMarkupInsertion() { + return mThrowOnDynamicMarkupInsertionCounter; + } + + void IncrementThrowOnDynamicMarkupInsertionCounter() { + ++mThrowOnDynamicMarkupInsertionCounter; + } + + void DecrementThrowOnDynamicMarkupInsertionCounter() { + MOZ_ASSERT(mThrowOnDynamicMarkupInsertionCounter); + --mThrowOnDynamicMarkupInsertionCounter; + } + + bool ShouldIgnoreOpens() const { return mIgnoreOpensDuringUnloadCounter; } + + void IncrementIgnoreOpensDuringUnloadCounter() { + ++mIgnoreOpensDuringUnloadCounter; + } + + void DecrementIgnoreOpensDuringUnloadCounter() { + MOZ_ASSERT(mIgnoreOpensDuringUnloadCounter); + --mIgnoreOpensDuringUnloadCounter; + } + + mozilla::dom::FeaturePolicy* FeaturePolicy() const; + + /** + * Find the (non-anonymous) content in this document for aFrame. It will + * be aFrame's content node if that content is in this document and not + * anonymous. Otherwise, when aFrame is in a subdocument, we use the frame + * element containing the subdocument containing aFrame, and/or find the + * nearest non-anonymous ancestor in this document. + * Returns null if there is no such element. + */ + nsIContent* GetContentInThisDocument(nsIFrame* aFrame) const; + + void ReportShadowDOMUsage(); + + // Sets flags for media telemetry. + void SetDocTreeHadMedia(); + + dom::XPathEvaluator* XPathEvaluator(); + + void MaybeInitializeFinalizeFrameLoaders(); + + void SetDelayFrameLoaderInitialization(bool aDelayFrameLoaderInitialization) { + mDelayFrameLoaderInitialization = aDelayFrameLoaderInitialization; + } + + void SetPrototypeDocument(nsXULPrototypeDocument* aPrototype); + + nsIPermissionDelegateHandler* PermDelegateHandler(); + + // Returns whether this is a top-level about:blank page without an opener (and + // thus likely not accessible by content). Likely because it shouldn't be used + // for security checks for example, see bug 1860098. + bool IsLikelyContentInaccessibleTopLevelAboutBlank() const; + + // CSS prefers-color-scheme media feature for this document. + enum class IgnoreRFP { No, Yes }; + ColorScheme PreferredColorScheme(IgnoreRFP = IgnoreRFP::No) const; + // Returns the initial color-scheme used for this document based on the + // color-scheme meta tag. + ColorScheme DefaultColorScheme() const; + + static bool HasRecentlyStartedForegroundLoads(); + + static bool AutomaticStorageAccessPermissionCanBeGranted( + nsIPrincipal* aPrincipal); + + already_AddRefed<Promise> AddCertException(bool aIsTemporary, + ErrorResult& aError); + + void ReloadWithHttpsOnlyException(); + + // Subframes need to be static cloned after the main document has been + // embedded within a script global. A `PendingFrameStaticClone` is a static + // clone which has not yet been performed. + // + // The getter returns a direct reference to an internal array which is + // manipulated from within printing code. + struct PendingFrameStaticClone { + PendingFrameStaticClone() = default; + PendingFrameStaticClone(PendingFrameStaticClone&&) = default; + PendingFrameStaticClone& operator=(PendingFrameStaticClone&&) = default; + ~PendingFrameStaticClone(); + + RefPtr<nsFrameLoaderOwner> mElement; + RefPtr<nsFrameLoader> mStaticCloneOf; + }; + void AddPendingFrameStaticClone(nsFrameLoaderOwner* aElement, + nsFrameLoader* aStaticCloneOf); + + bool ShouldAvoidNativeTheme() const; + + static bool IsValidDomain(nsIURI* aOrigHost, nsIURI* aNewURI); + + // Inform a parent document that a BrowserBridgeChild has been created for + // an OOP sub-document. + // (This is the OOP counterpart to nsDocLoader::ChildEnteringOnload) + void OOPChildLoadStarted(BrowserBridgeChild* aChild); + + // Inform a parent document that the BrowserBridgeChild for one of its + // OOP sub-documents is done calling its onload handler. + // (This is the OOP counterpart to nsDocLoader::ChildDoneWithOnload) + void OOPChildLoadDone(BrowserBridgeChild* aChild); + + void ClearOOPChildrenLoading(); + + bool HasOOPChildrenLoading() { return !mOOPChildrenLoading.IsEmpty(); } + + void SetDidHitCompleteSheetCache() { mDidHitCompleteSheetCache = true; } + + bool DidHitCompleteSheetCache() const { return mDidHitCompleteSheetCache; } + + /** + * Get the `HighlightRegistry` which contains all highlights associated + * with this document. + */ + class HighlightRegistry& HighlightRegistry(); + + bool ShouldResistFingerprinting(RFPTarget aTarget) const; + bool IsInPrivateBrowsing() const; + + const Maybe<RFPTarget>& GetOverriddenFingerprintingSettings() const { + return mOverriddenFingerprintingSettings; + } + + // Recompute the current resist fingerprinting state. Returns true when + // the state was changed. + bool RecomputeResistFingerprinting(); + + void RecordCanvasUsage(CanvasUsage& aUsage); + void RecordFontFingerprinting(); + + bool MayHaveDOMActivateListeners() const; + + void DropStyleSet(); + + protected: + // Returns the WindowContext for the document that we will contribute + // page use counters to. + WindowContext* GetWindowContextForPageUseCounters() const; + + void DoUpdateSVGUseElementShadowTrees(); + + already_AddRefed<nsIPrincipal> MaybeDowngradePrincipal( + nsIPrincipal* aPrincipal); + + void EnsureOnloadBlocker(); + + void SendToConsole(nsCOMArray<nsISecurityConsoleMessage>& aMessages); + + // Returns true if the scheme for the url for this document is "about". + bool IsAboutPage() const; + + bool ContainsEMEContent(); + bool ContainsMSEContent(); + + /** + * Returns the title element of the document as defined by the HTML + * specification, or null if there isn't one. For documents whose root + * element is an <svg:svg>, this is the first <svg:title> element that's a + * child of the root. For other documents, it's the first HTML title element + * in the document. + */ + Element* GetTitleElement(); + + void RecordNavigationTiming(ReadyState aReadyState); + + // Recomputes the visibility state but doesn't set the new value. + dom::VisibilityState ComputeVisibilityState() const; + + // Since we wouldn't automatically play media from non-visited page, we need + // to notify window when the page was first visited. + void MaybeActiveMediaComponents(); + + // Apply the fullscreen state to the document, and trigger related + // events. It returns false if the fullscreen element ready check + // fails and nothing gets changed. + bool ApplyFullscreen(UniquePtr<FullscreenRequest>); + + void RemoveDocStyleSheetsFromStyleSets(); + void ResetStylesheetsToURI(nsIURI* aURI); + void FillStyleSet(); + void FillStyleSetUserAndUASheets(); + void FillStyleSetDocumentSheets(); + void CompatibilityModeChanged(); + bool NeedsQuirksSheet() const { + // SVG documents never load quirk.css. + // FIXME(emilio): Can SVG documents be in quirks mode anyway? + return mCompatMode == eCompatibility_NavQuirks && !IsSVGDocument(); + } + void AddContentEditableStyleSheetsToStyleSet(bool aDesignMode); + void RemoveContentEditableStyleSheets(); + void AddStyleSheetToStyleSets(StyleSheet&); + void RemoveStyleSheetFromStyleSets(StyleSheet&); + void NotifyStyleSheetApplicableStateChanged(); + // Just like EnableStyleSheetsForSet, but doesn't check whether + // aSheetSet is null and allows the caller to control whether to set + // aSheetSet as the preferred set in the CSSLoader. + void EnableStyleSheetsForSetInternal(const nsAString& aSheetSet, + bool aUpdateCSSLoader); + + already_AddRefed<nsIURI> GetDomainURI(); + already_AddRefed<nsIURI> CreateInheritingURIForHost( + const nsACString& aHostString); + already_AddRefed<nsIURI> RegistrableDomainSuffixOfInternal( + const nsAString& aHostSuffixString, nsIURI* aOrigHost); + + void WriteCommon(const nsAString& aText, bool aNewlineTerminate, + mozilla::ErrorResult& aRv); + // A version of WriteCommon used by WebIDL bindings + void WriteCommon(const mozilla::dom::Sequence<nsString>& aText, + bool aNewlineTerminate, mozilla::ErrorResult& rv); + + void* GenerateParserKey(void); + + private: + // ExecCommandParam indicates how HTMLDocument.execCommand() treats given the + // parameter. + enum class ExecCommandParam : uint8_t { + // Always ignore it. + Ignore, + // Treat the given parameter as-is. If the command requires it, use it. + // Otherwise, ignore it. + String, + // Always treat it as boolean parameter. + Boolean, + // Always treat it as boolean, but inverted. + InvertedBoolean, + }; + + using GetEditorCommandFunc = mozilla::EditorCommand*(); + + struct InternalCommandData { + const char* mXULCommandName; + mozilla::Command mCommand; // uint8_t + // How ConvertToInternalCommand() to treats aValue. + // Its callers don't need to check this. + ExecCommandParam mExecCommandParam; // uint8_t + GetEditorCommandFunc* mGetEditorCommandFunc; + enum class CommandOnTextEditor : uint8_t { + Disabled, + Enabled, + FallThrough, // Not disabled, but handled by HTMLEditor if there is one + }; + CommandOnTextEditor mCommandOnTextEditor; + + InternalCommandData() + : mXULCommandName(nullptr), + mCommand(mozilla::Command::DoNothing), + mExecCommandParam(ExecCommandParam::Ignore), + mGetEditorCommandFunc(nullptr), + mCommandOnTextEditor(CommandOnTextEditor::Disabled) {} + InternalCommandData(const char* aXULCommandName, mozilla::Command aCommand, + ExecCommandParam aExecCommandParam, + GetEditorCommandFunc aGetEditorCommandFunc, + CommandOnTextEditor aCommandOnTextEditor) + : mXULCommandName(aXULCommandName), + mCommand(aCommand), + mExecCommandParam(aExecCommandParam), + mGetEditorCommandFunc(aGetEditorCommandFunc), + mCommandOnTextEditor(aCommandOnTextEditor) {} + + bool IsAvailableOnlyWhenEditable() const { + return mCommand != mozilla::Command::Cut && + mCommand != mozilla::Command::Copy && + mCommand != mozilla::Command::Paste && + mCommand != mozilla::Command::SetDocumentReadOnly && + mCommand != mozilla::Command::SelectAll; + } + bool IsCutOrCopyCommand() const { + return mCommand == mozilla::Command::Cut || + mCommand == mozilla::Command::Copy; + } + bool IsPasteCommand() const { return mCommand == mozilla::Command::Paste; } + }; + + /** + * AutoEditorCommandTarget considers which editor or global command manager + * handles given command. + */ + class MOZ_RAII AutoEditorCommandTarget { + public: + MOZ_CAN_RUN_SCRIPT AutoEditorCommandTarget( + Document& aDocument, const InternalCommandData& aCommandData); + AutoEditorCommandTarget() = delete; + explicit AutoEditorCommandTarget(const AutoEditorCommandTarget& aOther) = + delete; + + bool DoNothing() const { return mDoNothing; } + MOZ_CAN_RUN_SCRIPT bool IsEditable(Document* aDocument) const; + bool IsEditor() const { + MOZ_ASSERT_IF(mEditorCommand, mActiveEditor || mHTMLEditor); + return !!mEditorCommand; + } + + MOZ_CAN_RUN_SCRIPT bool IsCommandEnabled() const; + MOZ_CAN_RUN_SCRIPT nsresult DoCommand(nsIPrincipal* aPrincipal) const; + template <typename ParamType> + MOZ_CAN_RUN_SCRIPT nsresult DoCommandParam(const ParamType& aParam, + nsIPrincipal* aPrincipal) const; + MOZ_CAN_RUN_SCRIPT nsresult + GetCommandStateParams(nsCommandParams& aParams) const; + + private: + // The returned editor's life is guaranteed while this instance is alive. + EditorBase* GetTargetEditor() const; + + RefPtr<EditorBase> mActiveEditor; + RefPtr<HTMLEditor> mHTMLEditor; + RefPtr<EditorCommand> mEditorCommand; + const InternalCommandData& mCommandData; + bool mDoNothing = false; + }; + + /** + * Helper method to initialize sInternalCommandDataHashtable. + */ + static void EnsureInitializeInternalCommandDataHashtable(); + + /** + * ConvertToInternalCommand() returns a copy of InternalCommandData instance. + * Note that if aAdjustedValue is non-nullptr, this method checks whether + * aValue is proper value or not unless InternalCommandData::mExecCommandParam + * is ExecCommandParam::Ignore. For example, if aHTMLCommandName is + * "defaultParagraphSeparator", the value has to be one of "div", "p" or + * "br". If aValue is invalid value for InternalCommandData::mCommand, this + * returns a copy of instance created with default constructor. I.e., its + * mCommand is set to Command::DoNothing. So, this treats aHTMLCommandName + * is unsupported in such case. + * + * @param aHTMLCommandName Command name in HTML, e.g., used by + * execCommand(). + * @param aValue The value which is set to the 3rd parameter + * of execCommand(). + * @param aAdjustedValue [out] Must be empty string if set non-nullptr. + * Will be set to adjusted value for executing + * the internal command. + * @return Returns a copy of instance created with the + * default constructor if there is no + * corresponding internal command for + * aHTMLCommandName or aValue is invalid for + * found internal command when aAdjustedValue + * is not nullptr. Otherwise, returns a copy of + * instance registered in + * sInternalCommandDataHashtable. + */ + static InternalCommandData ConvertToInternalCommand( + const nsAString& aHTMLCommandName, const nsAString& aValue = u""_ns, + nsAString* aAdjustedValue = nullptr); + + /** + * AutoRunningExecCommandMarker is AutoRestorer for mIsRunningExecCommand. + * Since it's a bit field, not a bool member, therefore, we cannot use + * AutoRestorer for it. + */ + class MOZ_STACK_CLASS AutoRunningExecCommandMarker final { + public: + AutoRunningExecCommandMarker() = delete; + explicit AutoRunningExecCommandMarker(const AutoRunningExecCommandMarker&) = + delete; + // Guaranteeing the document's lifetime with `MOZ_CAN_RUN_SCRIPT`. + MOZ_CAN_RUN_SCRIPT AutoRunningExecCommandMarker(Document& aDocument, + nsIPrincipal* aPrincipal); + ~AutoRunningExecCommandMarker() { + if (mTreatAsUserInput) { + mDocument.mIsRunningExecCommandByChromeOrAddon = + mHasBeenRunningByChromeOrAddon; + } else { + mDocument.mIsRunningExecCommandByContent = mHasBeenRunningByContent; + } + } + + [[nodiscard]] bool IsSafeToRun() const { + // We don't allow nested calls of execCommand even if the caller is chrome + // script. + if (mTreatAsUserInput) { + return !mHasBeenRunningByChromeOrAddon && !mHasBeenRunningByContent; + } + // If current call is by content, we should ignore whether nested with a + // call by addon (or chrome script) because the caller wants to emulate + // user input for making it undoable. So, we should treat the first + // call as user input. + return !mHasBeenRunningByContent; + } + + private: + Document& mDocument; + bool mTreatAsUserInput; + bool mHasBeenRunningByContent; + bool mHasBeenRunningByChromeOrAddon; + }; + + // Mapping table from HTML command name to internal command. + using InternalCommandDataHashtable = + nsTHashMap<nsStringCaseInsensitiveHashKey, InternalCommandData>; + static InternalCommandDataHashtable* sInternalCommandDataHashtable; + + mutable std::bitset<static_cast<size_t>( + DeprecatedOperations::eDeprecatedOperationCount)> + mDeprecationWarnedAbout; + mutable std::bitset<eDocumentWarningCount> mDocWarningWarnedAbout; + + // Lazy-initialization to have mDocGroup initialized in prior to the + UniquePtr<ServoStyleSet> mStyleSet; + + protected: + // Never ever call this. Only call GetWindow! + nsPIDOMWindowOuter* GetWindowInternal() const; + + // Never ever call this. Only call GetScriptHandlingObject! + nsIScriptGlobalObject* GetScriptHandlingObjectInternal() const; + + // Never ever call this. Only call AllowXULXBL! + bool InternalAllowXULXBL(); + + /** + * These methods should be called before and after dispatching + * a mutation event. + * To make this easy and painless, use the mozAutoSubtreeModified helper + * class. + */ + void WillDispatchMutationEvent(nsINode* aTarget); + void MutationEventDispatched(nsINode* aTarget); + friend class mozAutoSubtreeModified; + + virtual Element* GetNameSpaceElement() override { return GetRootElement(); } + + nsCString GetContentTypeInternal() const { return mContentType; } + + // Update our frame request callback scheduling state, if needed. This will + // schedule or unschedule them, if necessary, and update + // mFrameRequestCallbacksScheduled. aOldShell should only be passed when + // mPresShell is becoming null; in that case it will be used to get hold of + // the relevant refresh driver. + void UpdateFrameRequestCallbackSchedulingState( + PresShell* aOldPresShell = nullptr); + + // Helper for GetScrollingElement/IsScrollingElement. + bool IsPotentiallyScrollable(HTMLBodyElement* aBody); + + void MaybeAllowStorageForOpenerAfterUserInteraction(); + + void MaybeStoreUserInteractionAsPermission(); + + // Helpers for GetElementsByName. + static bool MatchNameAttribute(Element* aElement, int32_t aNamespaceID, + nsAtom* aAtom, void* aData); + static void* UseExistingNameString(nsINode* aRootNode, const nsString* aName); + + void MaybeResolveReadyForIdle(); + + using AutomaticStorageAccessPermissionGrantPromise = + MozPromise<bool, bool, true>; + [[nodiscard]] RefPtr<AutomaticStorageAccessPermissionGrantPromise> + AutomaticStorageAccessPermissionCanBeGranted(bool hasUserActivation); + + static void AddToplevelLoadingDocument(Document* aDoc); + static void RemoveToplevelLoadingDocument(Document* aDoc); + static AutoTArray<Document*, 8>* sLoadingForegroundTopLevelContentDocument; + friend class cycleCollection; + + nsCOMPtr<nsIReferrerInfo> mPreloadReferrerInfo; + nsCOMPtr<nsIReferrerInfo> mReferrerInfo; + + nsString mLastModified; + + nsCOMPtr<nsIURI> mDocumentURI; + nsCOMPtr<nsIURI> mOriginalURI; + nsCOMPtr<nsIURI> mChromeXHRDocURI; + nsCOMPtr<nsIURI> mDocumentBaseURI; + nsCOMPtr<nsIURI> mChromeXHRDocBaseURI; + + // The base domain of the document for third-party checks. + nsCString mBaseDomain; + + // A lazily-constructed URL data for style system to resolve URL values. + RefPtr<URLExtraData> mCachedURLData; + nsCOMPtr<nsIReferrerInfo> mCachedReferrerInfoForInternalCSSAndSVGResources; + + nsWeakPtr mDocumentLoadGroup; + + WeakPtr<nsDocShell> mDocumentContainer; + + NotNull<const Encoding*> mCharacterSet; + int32_t mCharacterSetSource; + + OriginTrials mTrials; + + // This is just a weak pointer; the parent document owns its children. + Document* mParentDocument; + + // A reference to the element last returned from GetRootElement(). + Element* mCachedRootElement; + + // This is maintained by AutoSetRestoreSVGContextPaint. + const SVGContextPaint* mCurrentContextPaint = nullptr; + + // This is a weak reference, but we hold a strong reference to mNodeInfo, + // which in turn holds a strong reference to this mNodeInfoManager. + nsNodeInfoManager* mNodeInfoManager; + RefPtr<css::Loader> mCSSLoader; + RefPtr<css::ImageLoader> mStyleImageLoader; + + // The object that contains link color declarations (from the <body> mapped + // attributes), mapped attribute caches, and inline style attribute caches. + RefPtr<AttributeStyles> mAttributeStyles; + + // Tracking for images in the document. + RefPtr<dom::ImageTracker> mImageTracker; + + // A hashtable of ShadowRoots belonging to the composed doc. + // + // See ShadowRoot::Bind and ShadowRoot::Unbind. + ShadowRootSet mComposedShadowRoots; + + using SVGUseElementSet = nsTHashSet<SVGUseElement*>; + + // The set of <svg:use> elements that need a shadow tree reclone because the + // tree they map to has changed. + SVGUseElementSet mSVGUseElementsNeedingShadowTreeUpdate; + + // The set of all object, embed, video/audio elements or + // nsIObjectLoadingContent or DocumentActivity for which this is + // the owner document. (They might not be in the document.) + // + // These are non-owning pointers, the elements are responsible for removing + // themselves when they go away. + UniquePtr<nsTHashSet<nsISupports*>> mActivityObservers; + + // A hashtable of styled links keyed by address pointer. + nsTHashSet<Link*> mStyledLinks; +#ifdef DEBUG + // Indicates whether mStyledLinks was cleared or not. This is used to track + // state so we can provide useful assertions to consumers of ForgetLink and + // AddStyleRelevantLink. + bool mStyledLinksCleared; +#endif + + // The array of all links that need their status resolved. Links must add + // themselves to this set by calling RegisterPendingLinkUpdate when added to a + // document. + static const size_t kSegmentSize = 128; + + using LinksToUpdateList = + SegmentedVector<nsCOMPtr<Link>, kSegmentSize, InfallibleAllocPolicy>; + + LinksToUpdateList mLinksToUpdate; + + // SMIL Animation Controller, lazily-initialized in GetAnimationController + RefPtr<SMILAnimationController> mAnimationController; + + // Table of element properties for this document. + nsPropertyTable mPropertyTable; + + // Our cached .children collection + nsCOMPtr<nsIHTMLCollection> mChildrenCollection; + + // Various DOM lists + RefPtr<nsContentList> mImages; + RefPtr<nsContentList> mEmbeds; + RefPtr<nsContentList> mLinks; + RefPtr<nsContentList> mForms; + RefPtr<nsContentList> mScripts; + nsCOMPtr<nsIHTMLCollection> mApplets; + RefPtr<nsContentList> mAnchors; + + // container for per-context fonts (downloadable, SVG, etc.) + RefPtr<FontFaceSet> mFontFaceSet; + + // Last time this document or a one of its sub-documents was focused. If + // focus has never occurred then mLastFocusTime.IsNull() will be true. + TimeStamp mLastFocusTime; + + // Last time we found any scroll linked effect in this document. + TimeStamp mLastScrollLinkedEffectDetectionTime; + + DocumentState mState{DocumentState::LTR_LOCALE}; + + RefPtr<Promise> mReadyForIdle; + + RefPtr<mozilla::dom::FeaturePolicy> mFeaturePolicy; + + // Permission Delegate Handler, lazily-initialized in + // GetPermissionDelegateHandler + RefPtr<PermissionDelegateHandler> mPermissionDelegateHandler; + + bool mCachedStateObjectValid : 1; + bool mBlockAllMixedContent : 1; + bool mBlockAllMixedContentPreloads : 1; + bool mUpgradeInsecureRequests : 1; + bool mUpgradeInsecurePreloads : 1; + bool mDevToolsWatchingDOMMutations : 1; + + // True if BIDI is enabled. + bool mBidiEnabled : 1; + // True if we may need to recompute the language prefs for this document. + bool mMayNeedFontPrefsUpdate : 1; + // True if a MathML element has ever been owned by this document. + bool mMathMLEnabled : 1; + + // True if this document is the initial document for a window. This should + // basically be true only for documents that exist in newly-opened windows or + // documents created to satisfy a GetDocument() on a window when there's no + // document in it. + bool mIsInitialDocumentInWindow : 1; + + // True if this document has ever been the initial document for a window. This + // is useful to determine if a document that was the initial document at one + // point, and became non-initial later. + bool mIsEverInitialDocumentInWindow : 1; + + bool mIgnoreDocGroupMismatches : 1; + + // True if we're loaded as data and therefor has any dangerous stuff, such + // as scripts and plugins, disabled. + bool mLoadedAsData : 1; + + // True if the document is considered for memory reporting as a + // data document + bool mAddedToMemoryReportingAsDataDocument : 1; + + // If true, whoever is creating the document has gotten it to the + // point where it's safe to start layout on it. + bool mMayStartLayout : 1; + + // True iff we've ever fired a DOMTitleChanged event for this document + bool mHaveFiredTitleChange : 1; + + // State for IsShowing(). mIsShowing starts off false. It becomes true when + // OnPageShow happens and becomes false when OnPageHide happens. So it's false + // before the initial load completes and when we're in bfcache or unloaded, + // true otherwise. + bool mIsShowing : 1; + + // State for IsVisible(). mVisible starts off true. It becomes false when + // OnPageHide happens, and becomes true again when OnPageShow happens. So + // it's false only when we're in bfcache or unloaded. + bool mVisible : 1; + + // True if our content viewer has been removed from the docshell + // (it may still be displayed, but in zombie state). Form control data + // has been saved. + bool mRemovedFromDocShell : 1; + + // True iff DNS prefetch is allowed for this document. Note that if the + // document has no window, DNS prefetch won't be performed no matter what. + bool mAllowDNSPrefetch : 1; + + // True when this document is a static clone of a normal document + bool mIsStaticDocument : 1; + + // True while this document is being cloned to a static document. + bool mCreatingStaticClone : 1; + + // True if this static document has any <canvas> element with a + // mozPrintCallback property at the time of the clone. + bool mHasPrintCallbacks : 1; + + // True iff the document is being unlinked or deleted. + bool mInUnlinkOrDeletion : 1; + + // True if document has ever had script handling object. + bool mHasHadScriptHandlingObject : 1; + + // True if we're an SVG document being used as an image. + bool mIsBeingUsedAsImage : 1; + + // True if our current document URI's scheme enables privileged CSS rules. + bool mChromeRulesEnabled : 1; + + // True if we're loaded in a chrome docshell. + bool mInChromeDocShell : 1; + + // True is this document is synthetic : stand alone image, video, audio + // file, etc. + bool mIsSyntheticDocument : 1; + + // True is there is a pending runnable which will call + // FlushPendingLinkUpdates(). + bool mHasLinksToUpdateRunnable : 1; + + // True if we're flushing pending link updates. + bool mFlushingPendingLinkUpdates : 1; + + // True if a DOMMutationObserver is perhaps attached to a node in the + // document. + bool mMayHaveDOMMutationObservers : 1; + + // True if an nsIAnimationObserver is perhaps attached to a node in the + // document. + bool mMayHaveAnimationObservers : 1; + + // True if the document has a CSP delivered throuh a header + bool mHasCSPDeliveredThroughHeader : 1; + + // True if DisallowBFCaching has been called on this document. + bool mBFCacheDisallowed : 1; + + bool mHasHadDefaultView : 1; + + // Whether style sheet change events will be dispatched for this document + bool mStyleSheetChangeEventsEnabled : 1; + + // Whether shadowrootattached/anonymousnodecreated/anonymousnoderemoved events + // will be dispatched for this document. + bool mDevToolsAnonymousAndShadowEventsEnabled : 1; + + // Whether the document was created by a srcdoc iframe. + bool mIsSrcdocDocument : 1; + + // Whether this document has a display document and thus is considered to + // be a resource document. Normally this is the same as !!mDisplayDocument, + // but mDisplayDocument is cleared during Unlink. mHasDisplayDocument is + // valid in the document's destructor. + bool mHasDisplayDocument : 1; + + // Is the current mFontFaceSet valid? + bool mFontFaceSetDirty : 1; + + // True if we have fired the DOMContentLoaded event, or don't plan to fire one + // (e.g. we're not being parsed at all). + bool mDidFireDOMContentLoaded : 1; + + // True if we have frame request callbacks scheduled with the refresh driver. + // This should generally be updated only via + // UpdateFrameRequestCallbackSchedulingState. + bool mFrameRequestCallbacksScheduled : 1; + + bool mIsTopLevelContentDocument : 1; + + bool mIsContentDocument : 1; + + // True if we have called BeginLoad and are expecting a paired EndLoad call. + bool mDidCallBeginLoad : 1; + + // True if the encoding menu should be disabled. + bool mEncodingMenuDisabled : 1; + + // False if we've disabled link handling for elements inside this document, + // true otherwise. + bool mLinksEnabled : 1; + + // True if this document is for an SVG-in-OpenType font. + bool mIsSVGGlyphsDocument : 1; + + // True if the document is being destroyed. + bool mInDestructor : 1; + + // True if the document has been detached from its content viewer. + bool mIsGoingAway : 1; + + // Whether we have filled our style set with all the stylesheets. + bool mStyleSetFilled : 1; + + // Whether we have a quirks mode stylesheet in the style set. + bool mQuirkSheetAdded : 1; + + // Whether we have a contenteditable.css stylesheet in the style set. + bool mContentEditableSheetAdded : 1; + + // Whether we have a designmode.css stylesheet in the style set. + bool mDesignModeSheetAdded : 1; + + // True if this document has ever had an HTML or SVG <title> element + // bound to it + bool mMayHaveTitleElement : 1; + + bool mDOMLoadingSet : 1; + bool mDOMInteractiveSet : 1; + bool mDOMCompleteSet : 1; + bool mAutoFocusFired : 1; + + bool mScrolledToRefAlready : 1; + bool mChangeScrollPosWhenScrollingToRef : 1; + + bool mDelayFrameLoaderInitialization : 1; + + bool mSynchronousDOMContentLoaded : 1; + + // Set to true when the document is possibly controlled by the ServiceWorker. + // Used to prevent multiple requests to ServiceWorkerManager. + bool mMaybeServiceWorkerControlled : 1; + + // These member variables cache information about the viewport so we don't + // have to recalculate it each time. + bool mAllowZoom : 1; + bool mValidScaleFloat : 1; + bool mValidMinScale : 1; + bool mValidMaxScale : 1; + bool mWidthStrEmpty : 1; + + // Parser aborted. True if the parser of this document was forcibly + // terminated instead of letting it finish at its own pace. + bool mParserAborted : 1; + + // Whether we have reported document use counters for this document with + // Telemetry yet. Normally this is only done at document destruction time, + // but for image documents (SVG documents) that are not guaranteed to be + // destroyed, we report use counters when the image cache no longer has any + // imgRequestProxys pointing to them. We track whether we ever reported use + // counters so that we only report them once for the document. + bool mReportedDocumentUseCounters : 1; + + bool mHasReportedShadowDOMUsage : 1; + + // Whether an event triggered by the refresh driver was delayed because this + // document has suppressed events. + bool mHasDelayedRefreshEvent : 1; + + // The HTML spec has a "iframe load in progress" flag, but that doesn't seem + // to have the right semantics. See + // <https://github.com/whatwg/html/issues/4292>. What we have instead is a + // flag that is set while the window's 'load' event is firing if this document + // is the window's document. + bool mLoadEventFiring : 1; + + // The HTML spec has a "mute iframe load" flag, but that doesn't seem to have + // the right semantics. See <https://github.com/whatwg/html/issues/4292>. + // What we have instead is a flag that is set if completion of our document + // via document.close() should skip firing the load event. Note that this + // flag is only relevant for HTML documents, but lives here for reasons that + // are documented above on SkipLoadEventAfterClose(). + bool mSkipLoadEventAfterClose : 1; + + // When false, the .cookies property is completely disabled + bool mDisableCookieAccess : 1; + + // When false, the document.write() API is disabled. + bool mDisableDocWrite : 1; + + // Has document.write() been called with a recursion depth higher than + // allowed? + bool mTooDeepWriteRecursion : 1; + + /** + * Temporary flag that is set in EndUpdate() to ignore + * MaybeEditingStateChanged() script runners from a nested scope. + */ + bool mPendingMaybeEditingStateChanged : 1; + + // mHasBeenEditable is set to true when mEditingState is firstly set to + // eDesignMode or eContentEditable. + bool mHasBeenEditable : 1; + + // Whether we've warned about the CSS zoom property. + // + // We don't use the general deprecated operation mechanism for this because we + // also record this as a `CountedUnknownProperty`. + bool mHasWarnedAboutZoom : 1; + + // While we're handling an execCommand call by web app, set + // to true. + bool mIsRunningExecCommandByContent : 1; + // While we're handling an execCommand call by an addon (or chrome script), + // set to true. + bool mIsRunningExecCommandByChromeOrAddon : 1; + + // True if we should change the readystate to complete after we fire + // DOMContentLoaded. This happens when we abort a load and + // nsDocumentViewer::EndLoad runs while we still have things blocking + // DOMContentLoaded. We wait for those to complete, and then update the + // readystate when they finish. + bool mSetCompleteAfterDOMContentLoaded : 1; + + // Set the true if a completed cached stylesheet was created for the document. + bool mDidHitCompleteSheetCache : 1; + + // Whether we have initialized mShouldReportUseCounters and + // mShouldSendPageUseCounters, and sent any needed message to the parent + // process to indicate that use counter data will be sent at some later point. + bool mUseCountersInitialized : 1; + + // Whether this document should report use counters. + bool mShouldReportUseCounters : 1; + + // Whether this document should send page use counters. Set to true after + // we've called SendExpectPageUseCounters on the top-level WindowGlobal. + bool mShouldSendPageUseCounters : 1; + + // Whether the user has interacted with the document or not: + bool mUserHasInteracted : 1; + + // We constantly update the user-interaction anti-tracking permission at any + // user-interaction using a timer. This boolean value is set to true when this + // timer is scheduled. + bool mHasUserInteractionTimerScheduled : 1; + + // Whether we should resist fingerprinting. + bool mShouldResistFingerprinting : 1; + + // Whether we are in private browsing mode. + bool mIsInPrivateBrowsing : 1; + + // Whether we're cloning the contents of an SVG use element. + bool mCloningForSVGUse : 1; + + bool mAllowDeclarativeShadowRoots : 1; + + // The fingerprinting protections overrides for this document. The value will + // override the default enabled fingerprinting protections for this document. + // This will only get populated if these is one that comes from the local + // fingerprinting protection override pref or WebCompat. Otherwise, a value of + // Nothing() indicates no overrides are present for this document. + Maybe<RFPTarget> mOverriddenFingerprintingSettings; + + uint8_t mXMLDeclarationBits; + + // NOTE(emilio): Technically, this should be a StyleColorSchemeFlags, but we + // use uint8_t to avoid having to include a bunch of style system headers + // everywhere. + uint8_t mColorSchemeBits = 0; + + // Currently active onload blockers. + uint32_t mOnloadBlockCount; + + // Tracks if we are currently processing any document.write calls (either + // implicit or explicit). Note that if a write call writes out something which + // would block the parser, then mWriteLevel will be incorrect until the parser + // finishes processing that script. + uint32_t mWriteLevel; + + uint32_t mContentEditableCount; + EditingState mEditingState; + + // Compatibility mode + nsCompatibility mCompatMode; + + // Our readyState + ReadyState mReadyState; + + // Ancestor's loading state + bool mAncestorIsLoading; + + // Our visibility state + dom::VisibilityState mVisibilityState; + + enum Type { + eUnknown, // should never be used + eHTML, + eXHTML, + eGenericXML, + eSVG + }; + + Type mType; + + uint8_t mDefaultElementType; + + enum Tri { eTriUnset = 0, eTriFalse, eTriTrue }; + + Tri mAllowXULXBL; + + bool mSkipDTDSecurityChecks; + + // The document's script global object, the object from which the + // document can get its script context and scope. This is the + // *inner* window object. + nsCOMPtr<nsIScriptGlobalObject> mScriptGlobalObject; + + // If mIsStaticDocument is true, mOriginalDocument points to the original + // document. + RefPtr<Document> mOriginalDocument; + + // The bidi options for this document. What this bitfield means is + // defined in nsBidiUtils.h + uint32_t mBidiOptions; + + // The sandbox flags on the document. These reflect the value of the sandbox + // attribute of the associated IFRAME or CSP-protectable content, if existent. + // These are set at load time and are immutable - see nsSandboxFlags.h for the + // possible flags. + uint32_t mSandboxFlags; + + // The embedder policy obtained from parsing the HTTP response header or from + // our opener if this is the initial about:blank document. + Maybe<nsILoadInfo::CrossOriginEmbedderPolicy> mEmbedderPolicy; + + RefPtr<nsAtom> mContentLanguage; + + // The channel that got passed to Document::StartDocumentLoad(), if any. + nsCOMPtr<nsIChannel> mChannel; + + // The CSP for every load lives in the Client within the LoadInfo. For all + // document-initiated subresource loads we can use that cached version of the + // CSP so we do not have to deserialize the CSP from the Client all the time. + nsCOMPtr<nsIContentSecurityPolicy> mCSP; + nsCOMPtr<nsIContentSecurityPolicy> mPreloadCSP; + + private: + nsCString mContentType; + + protected: + // The document's security info + nsCOMPtr<nsITransportSecurityInfo> mSecurityInfo; + + // The channel that failed to load and resulted in an error page. + // This only applies to error pages. Might be null. + nsCOMPtr<nsIChannel> mFailedChannel; + + // if this document is part of a multipart document, + // the ID can be used to distinguish it from the other parts. + uint32_t mPartID; + + // Cycle collector generation in which we're certain that this document + // won't be collected + uint32_t mMarkedCCGeneration; + + PresShell* mPresShell; + + nsCOMArray<nsINode> mSubtreeModifiedTargets; + uint32_t mSubtreeModifiedDepth; + + // All images in process of being preloaded. This is a hashtable so + // we can remove them as the real image loads start; that way we + // make sure to not keep the image load going when no one cares + // about it anymore. + nsRefPtrHashtable<nsURIHashKey, imgIRequest> mPreloadingImages; + + // A list of preconnects initiated by the preloader. This prevents + // the same uri from being used more than once, and allows the dom + // builder to not repeat the work of the preloader. + nsTHashMap<nsURIHashKey, bool> mPreloadedPreconnects; + + // Current depth of picture elements from parser + uint32_t mPreloadPictureDepth; + + // Set if we've found a URL for the current picture + nsString mPreloadPictureFoundSource; + + // If we're an external resource document, this will be non-null and will + // point to our "display document": the one that all resource lookups should + // go to. + RefPtr<Document> mDisplayDocument; + + uint32_t mEventsSuppressed; + + // Any XHR ChannelEventQueues that were suspended on this document while + // events were suppressed. + nsTArray<RefPtr<net::ChannelEventQueue>> mSuspendedQueues; + + // Any postMessage events that were suspended on this document while events + // were suppressed. + nsTArray<RefPtr<PostMessageEvent>> mSuspendedPostMessageEvents; + + RefPtr<EventListener> mSuppressedEventListener; + + /** + * https://html.spec.whatwg.org/#ignore-destructive-writes-counter + */ + uint32_t mIgnoreDestructiveWritesCounter; + + // Count of live static clones of this document. + uint32_t mStaticCloneCount; + + // If the document is currently printing (or in print preview) this will point + // to the current static clone of this document. This is weak since the clone + // also has a reference to this document. + WeakPtr<Document> mLatestStaticClone; + + // Array of nodes that have been blocked to prevent user tracking. + // They most likely have had their nsIChannel canceled by the URL + // classifier. (Safebrowsing) + // + // Weak nsINode pointers are used to allow nodes to disappear. + nsTArray<nsWeakPtr> mBlockedNodesByClassifier; + + // Weak reference to mScriptGlobalObject QI:d to nsPIDOMWindow, + // updated on every set of mScriptGlobalObject. + nsPIDOMWindowInner* mWindow; + + nsCOMPtr<nsIDocumentEncoder> mCachedEncoder; + + FrameRequestManager mFrameRequestManager; + + // This object allows us to evict ourself from the back/forward cache. The + // pointer is non-null iff we're currently in the bfcache. + nsIBFCacheEntry* mBFCacheEntry; + + // Our base target. + nsString mBaseTarget; + + nsCOMPtr<nsIStructuredCloneContainer> mStateObjectContainer; + JS::Heap<JS::Value> mCachedStateObject; + + uint32_t mInSyncOperationCount; + + UniquePtr<dom::XPathEvaluator> mXPathEvaluator; + + nsTArray<RefPtr<AnonymousContent>> mAnonymousContents; + + uint32_t mBlockDOMContentLoaded; + + // Our live MediaQueryLists + LinkedList<MediaQueryList> mDOMMediaQueryLists; + + // A hashset to keep track of which {element, imgRequestProxy} + // combination has been processed to avoid considering the same + // element twice for LargestContentfulPaint. + nsTHashtable<LCPEntryHashEntry> mContentIdentifiersForLCP; + + // Array of observers + nsTObserverArray<nsIDocumentObserver*> mObservers; + + // Flags for use counters used directly by this document. + UseCounters mUseCounters; + // Flags for use counters from resource documents, static clones, + // and SVG images referenced by this document. Those documents propagate + // their use counters up to here, which then count towards the top-level + // document's page use counters. + UseCounters mChildDocumentUseCounters; + + // The CSS property use counters. + UniquePtr<StyleUseCounters> mStyleUseCounters; + + TimeStamp mPageUnloadingEventTimeStamp; + + RefPtr<DocGroup> mDocGroup; + + RefPtr<nsCommandManager> mMidasCommandManager; + + // The set of all the tracking script URLs. URLs are added to this set by + // calling NoteScriptTrackingStatus(). Currently we assume that a URL not + // existing in the set means the corresponding script isn't a tracking script. + nsTHashSet<nsCString> mTrackingScripts; + + // Pointer to our parser if we're currently in the process of being + // parsed into. + nsCOMPtr<nsIParser> mParser; + + // If the document was created from the the prototype cache there will be a + // reference to the prototype document to allow tracing. + RefPtr<nsXULPrototypeDocument> mPrototypeDocument; + + // Weak reference to our sink for in case we no longer have a parser. This + // will allow us to flush out any pending stuff from the sink even if + // EndLoad() has already happened. + nsWeakPtr mWeakSink; + + // Our update nesting level + uint32_t mUpdateNestLevel; + + // HTTPS-Only Mode Status + // Constants are defined at nsILoadInfo::HTTPS_ONLY_* + uint32_t mHttpsOnlyStatus; + + enum ViewportType : uint8_t { + DisplayWidthHeight, + Specified, + Unknown, + }; + + ViewportType mViewportType; + + // viewport-fit described by + // https://drafts.csswg.org/css-round-display/#viewport-fit-descriptor + ViewportFitType mViewportFit; + + PLDHashTable* mSubDocuments; + + class HeaderData; + UniquePtr<HeaderData> mHeaderData; + + nsTArray<net::EarlyHintConnectArgs> mEarlyHints; + + class TitleChangeEvent; + nsRevocableEventPtr<TitleChangeEvent> mPendingTitleChangeEvent; + + RefPtr<nsDOMNavigationTiming> mTiming; + + // Recorded time of change to 'loading' state + // or time of the page gets restored from BFCache. + TimeStamp mLoadingOrRestoredFromBFCacheTimeStamp; + + // Decided to use nsTObserverArray because it allows us to + // remove candidates while iterating them and this is what + // the spec defines. We could implement the spec without + // using nsTObserverArray, however using nsTObserverArray is more clear. + nsTObserverArray<nsWeakPtr> mAutoFocusCandidates; + + nsCString mScrollToRef; + + // Weak reference to the scope object (aka the script global object) + // that, unlike mScriptGlobalObject, is never unset once set. This + // is a weak reference to avoid leaks due to circular references. + nsWeakPtr mScopeObject; + + // Array of intersection observers + nsTHashSet<DOMIntersectionObserver*> mIntersectionObservers; + + // Array of resize observers + nsTArray<ResizeObserver*> mResizeObservers; + + RefPtr<DOMIntersectionObserver> mLazyLoadObserver; + + // ResizeObserver for storing and removing the last remembered size. + // @see {@link https://drafts.csswg.org/css-sizing-4/#last-remembered} + RefPtr<ResizeObserver> mLastRememberedSizeObserver; + + // Stack of top layer elements. + nsTArray<nsWeakPtr> mTopLayer; + + // The root of the doc tree in which this document is in. This is only + // non-null when this document is in fullscreen mode. + WeakPtr<Document> mFullscreenRoot; + + RefPtr<DOMImplementation> mDOMImplementation; + + RefPtr<nsContentList> mImageMaps; + + // A set of responsive images keyed by address pointer. + nsTHashSet<HTMLImageElement*> mResponsiveContent; + + RefPtr<DocumentTimeline> mDocumentTimeline; + LinkedList<DocumentTimeline> mTimelines; + + RefPtr<dom::ScriptLoader> mScriptLoader; + + // Tracker for scroll-driven animations that are waiting to start. + // nullptr until GetOrCreateScrollTimelineAnimationTracker is called. + RefPtr<ScrollTimelineAnimationTracker> mScrollTimelineAnimationTracker; + + // A document "without a browsing context" that owns the content of + // HTMLTemplateElement. + RefPtr<Document> mTemplateContentsOwner; + + dom::ExternalResourceMap mExternalResourceMap; + + // ScreenOrientation "pending promise" as described by + // http://www.w3.org/TR/screen-orientation/ + RefPtr<Promise> mOrientationPendingPromise; + + nsTArray<RefPtr<nsFrameLoader>> mInitializableFrameLoaders; + nsTArray<nsCOMPtr<nsIRunnable>> mFrameLoaderFinalizers; + RefPtr<nsRunnableMethod<Document>> mFrameLoaderRunner; + + nsTArray<PendingFrameStaticClone> mPendingFrameStaticClones; + + // The layout history state that should be used by nodes in this + // document. We only actually store a pointer to it when: + // 1) We have no script global object. + // 2) We haven't had Destroy() called on us yet. + nsCOMPtr<nsILayoutHistoryState> mLayoutHistoryState; + + // Mapping of wake lock types to sets of wake locks sentinels + // https://w3c.github.io/screen-wake-lock/#internal-slots + nsTHashMap<WakeLockType, nsTHashSet<RefPtr<WakeLockSentinel>>> mActiveLocks; + + // The parsed viewport metadata of the last modified <meta name=viewport> + // element. + UniquePtr<ViewportMetaData> mLastModifiedViewportMetaData; + + // A tree ordered list of all color-scheme meta tags in this document. + // + // TODO(emilio): There are other meta tags in the spec that have a similar + // processing model to color-scheme. We could store all in-document meta tags + // here to get sane and fast <meta> element processing. + TreeOrderedArray<HTMLMetaElement*> mColorSchemeMetaTags; + + // These member variables cache information about the viewport so we don't + // have to recalculate it each time. + LayoutDeviceToScreenScale mScaleMinFloat; + LayoutDeviceToScreenScale mScaleMaxFloat; + LayoutDeviceToScreenScale mScaleFloat; + CSSToLayoutDeviceScale mPixelRatio; + + CSSCoord mMinWidth; + CSSCoord mMaxWidth; + CSSCoord mMinHeight; + CSSCoord mMaxHeight; + + RefPtr<EventListenerManager> mListenerManager; + + nsCOMPtr<nsIRequest> mOnloadBlocker; + + // Gecko-internal sheets used for extensions and such. + // Exposed to privileged script via nsIDOMWindowUtils.loadSheet. + nsTArray<RefPtr<StyleSheet>> mAdditionalSheets[AdditionalSheetTypeCount]; + + // Member to store out last-selected stylesheet set. + nsString mLastStyleSheetSet; + nsString mPreferredStyleSheetSet; + + RefPtr<DOMStyleSheetSetList> mStyleSheetSetList; + + // We lazily calculate declaration blocks for elements with mapped + // attributes. This set contains all elements which need lazy resolution. + nsTHashSet<Element*> mLazyPresElements; + + nsTHashSet<RefPtr<nsAtom>> mLanguagesUsed; + + // TODO(emilio): Is this hot enough to warrant to be cached? + RefPtr<nsAtom> mLanguageFromCharset; + + // Restyle root for servo's style system. + // + // We store this as an nsINode, rather than as an Element, so that we can + // store the Document node as the restyle root if the entire document (along + // with all document-level native-anonymous content) needs to be restyled. + // + // We also track which "descendant" bits (normal/animation-only/lazy-fc) the + // root corresponds to. + nsCOMPtr<nsINode> mServoRestyleRoot; + uint32_t mServoRestyleRootDirtyBits; + + // Used in conjunction with the create-an-element-for-the-token algorithm to + // prevent custom element constructors from being able to use document.open(), + // document.close(), and document.write() when they are invoked by the parser. + uint32_t mThrowOnDynamicMarkupInsertionCounter; + + // Count of unload/beforeunload/pagehide operations in progress. + uint32_t mIgnoreOpensDuringUnloadCounter; + + nsCOMPtr<nsIDOMXULCommandDispatcher> + mCommandDispatcher; // [OWNER] of the focus tracker + + RefPtr<XULBroadcastManager> mXULBroadcastManager; + RefPtr<XULPersist> mXULPersist; + RefPtr<ChromeObserver> mChromeObserver; + + RefPtr<HTMLAllCollection> mAll; + + nsTHashSet<RefPtr<WorkerDocumentListener>> mWorkerListeners; + + // Pres shell resolution saved before entering fullscreen mode. + float mSavedResolution; + + // Pres shell resolution saved before creating a MobileViewportManager. + float mSavedResolutionBeforeMVM; + + nsCOMPtr<nsICookieJarSettings> mCookieJarSettings; + + bool mHasStoragePermission; + + // Document generation. Gets incremented everytime it changes. + int32_t mGeneration; + + // Cached TabSizes values for the document. + int32_t mCachedTabSizeGeneration; + nsTabSizes mCachedTabSizes; + + // This is equal to document's principal but with an isolation key. See + // StoragePrincipalHelper.h to know more. + nsCOMPtr<nsIPrincipal> mPartitionedPrincipal; + + // The cached storage principal for this document. + // This is mutable so that we can keep EffectiveStoragePrincipal() const + // which is required due to its CloneDocHelper() call site. :-( + mutable nsCOMPtr<nsIPrincipal> mActiveStoragePrincipal; + + // The cached cookie principal for this document. + // This is mutable so that we can keep EffectiveCookiePrincipal() const + // which is required due to its CloneDocHelper() call site. :-( + mutable nsCOMPtr<nsIPrincipal> mActiveCookiePrincipal; + + // See GetNextFormNumber and GetNextControlNumber. + int32_t mNextFormNumber; + int32_t mNextControlNumber; + + uint32_t mMediaElementWithMSECount = 0; + + // Scope preloads per document. This is used by speculative loading as well. + PreloadService mPreloadService; + + // See NotifyFetchOrXHRSuccess and SetNotifyFetchSuccess. + bool mShouldNotifyFetchSuccess; + + // See SetNotifyFormOrPasswordRemoved and ShouldNotifyFormOrPasswordRemoved. + bool mShouldNotifyFormOrPasswordRemoved; + + // Record page load telemetry + void RecordPageLoadEventTelemetry( + glean::perf::PageLoadExtra& aEventTelemetryData); + + // Accumulate JS telemetry collected + void AccumulateJSTelemetry( + glean::perf::PageLoadExtra& aEventTelemetryDataOut); + + // Accumulate page load metrics + void AccumulatePageLoadTelemetry( + glean::perf::PageLoadExtra& aEventTelemetryDataOut); + + // The OOP counterpart to nsDocLoader::mChildrenInOnload. + // Not holding strong refs here since we don't actually use the BBCs. + nsTArray<const BrowserBridgeChild*> mOOPChildrenLoading; + + // Registry of custom highlight definitions associated with this document. + RefPtr<class HighlightRegistry> mHighlightRegistry; + + // Used for tracking a number of recent canvas extractions (e.g. toDataURL), + // this is used for a canvas fingerprinter detection heuristic. + nsTArray<CanvasUsage> mCanvasUsage; + uint64_t mLastCanvasUsage = 0; + + UniquePtr<RadioGroupContainer> mRadioGroupContainer; + + public: + // Needs to be public because the bindings code pokes at it. + JS::ExpandoAndGeneration mExpandoAndGeneration; + + bool HasPendingInitialTranslation(); + + nsRefPtrHashtable<nsRefPtrHashKey<Element>, nsXULPrototypeElement> + mL10nProtoElements; + + float GetSavedResolutionBeforeMVM() { return mSavedResolutionBeforeMVM; } + void SetSavedResolutionBeforeMVM(float aResolution) { + mSavedResolutionBeforeMVM = aResolution; + } + + void LoadEventFired(); + + RadioGroupContainer& OwnedRadioGroupContainer(); + + static already_AddRefed<Document> ParseHTMLUnsafe(GlobalObject& aGlobal, + const nsAString& aHTML); +}; + +NS_DEFINE_STATIC_IID_ACCESSOR(Document, NS_IDOCUMENT_IID) + +/** + * mozAutoSubtreeModified batches DOM mutations so that a DOMSubtreeModified + * event is dispatched, if necessary, when the outermost mozAutoSubtreeModified + * object is deleted. + */ +class MOZ_STACK_CLASS mozAutoSubtreeModified { + public: + /** + * @param aSubTreeOwner The document in which a subtree will be modified. + * @param aTarget The target of the possible DOMSubtreeModified event. + * Can be nullptr, in which case mozAutoSubtreeModified + * is just used to batch DOM mutations. + */ + mozAutoSubtreeModified(Document* aSubtreeOwner, nsINode* aTarget) { + UpdateTarget(aSubtreeOwner, aTarget); + } + + ~mozAutoSubtreeModified() { UpdateTarget(nullptr, nullptr); } + + void UpdateTarget(Document* aSubtreeOwner, nsINode* aTarget) { + if (mSubtreeOwner) { + mSubtreeOwner->MutationEventDispatched(mTarget); + } + + mTarget = aTarget; + mSubtreeOwner = aSubtreeOwner; + if (mSubtreeOwner) { + mSubtreeOwner->WillDispatchMutationEvent(mTarget); + } + } + + private: + nsCOMPtr<nsINode> mTarget; + RefPtr<Document> mSubtreeOwner; +}; + +enum class SyncOperationBehavior { eSuspendInput, eAllowInput }; + +class AutoWalkBrowsingContextGroup { + public: + virtual ~AutoWalkBrowsingContextGroup() = default; + + protected: + void SuppressBrowsingContext(BrowsingContext* aContext); + void SuppressBrowsingContextGroup(BrowsingContextGroup* aGroup); + void UnsuppressDocuments() { + for (const auto& doc : mDocuments) { + UnsuppressDocument(doc); + } + } + virtual void SuppressDocument(Document* aDocument) = 0; + virtual void UnsuppressDocument(Document* aDocument) = 0; + AutoTArray<RefPtr<Document>, 16> mDocuments; +}; + +class MOZ_RAII nsAutoSyncOperation : private AutoWalkBrowsingContextGroup { + public: + explicit nsAutoSyncOperation(Document* aDocument, + SyncOperationBehavior aSyncBehavior); + ~nsAutoSyncOperation(); + + protected: + void SuppressDocument(Document* aDocument) override; + void UnsuppressDocument(Document* aDocument) override; + + private: + uint32_t mMicroTaskLevel; + const SyncOperationBehavior mSyncBehavior; + RefPtr<BrowsingContext> mBrowsingContext; +}; + +class MOZ_RAII AutoSetThrowOnDynamicMarkupInsertionCounter final { + public: + explicit AutoSetThrowOnDynamicMarkupInsertionCounter(Document* aDocument) + : mDocument(aDocument) { + mDocument->IncrementThrowOnDynamicMarkupInsertionCounter(); + } + + ~AutoSetThrowOnDynamicMarkupInsertionCounter() { + mDocument->DecrementThrowOnDynamicMarkupInsertionCounter(); + } + + private: + Document* mDocument; +}; + +class MOZ_RAII IgnoreOpensDuringUnload final { + public: + explicit IgnoreOpensDuringUnload(Document* aDoc) : mDoc(aDoc) { + mDoc->IncrementIgnoreOpensDuringUnloadCounter(); + } + + ~IgnoreOpensDuringUnload() { + mDoc->DecrementIgnoreOpensDuringUnloadCounter(); + } + + private: + Document* mDoc; +}; + +bool IsInFocusedTab(Document* aDoc); + +// This covers all cases covered by IsInFocusedTab, but also ensures that +// focused tab is "active" meaning not occluded. +bool IsInActiveTab(Document* aDoc); + +} // namespace mozilla::dom + +NON_VIRTUAL_ADDREF_RELEASE(mozilla::dom::Document) + +// XXX These belong somewhere else +nsresult NS_NewHTMLDocument(mozilla::dom::Document** aInstancePtrResult, + nsIPrincipal* aPrincipal, + nsIPrincipal* aPartitionedPrincipal, + bool aLoadedAsData = false); + +nsresult NS_NewXMLDocument(mozilla::dom::Document** aInstancePtrResult, + nsIPrincipal* aPrincipal, + nsIPrincipal* aPartitionedPrincipal, + bool aLoadedAsData = false, + bool aIsPlainDocument = false); + +nsresult NS_NewSVGDocument(mozilla::dom::Document** aInstancePtrResult, + nsIPrincipal* aPrincipal, + nsIPrincipal* aPartitionedPrincipal); + +nsresult NS_NewImageDocument(mozilla::dom::Document** aInstancePtrResult, + nsIPrincipal* aPrincipal, + nsIPrincipal* aPartitionedPrincipal); + +nsresult NS_NewVideoDocument(mozilla::dom::Document** aInstancePtrResult, + nsIPrincipal* aPrincipal, + nsIPrincipal* aPartitionedPrincipal); + +// Enum for requesting a particular type of document when creating a doc +enum DocumentFlavor { + DocumentFlavorLegacyGuess, // compat with old code until made HTML5-compliant + DocumentFlavorHTML, // HTMLDocument with HTMLness bit set to true + DocumentFlavorSVG, // SVGDocument + DocumentFlavorXML, // XMLDocument + DocumentFlavorPlain, // Just a Document +}; + +// Note: it's the caller's responsibility to create or get aPrincipal as needed +// -- this method will not attempt to get a principal based on aDocumentURI. +// Also, both aDocumentURI and aBaseURI must not be null. +nsresult NS_NewDOMDocument( + mozilla::dom::Document** aInstancePtrResult, const nsAString& aNamespaceURI, + const nsAString& aQualifiedName, mozilla::dom::DocumentType* aDoctype, + nsIURI* aDocumentURI, nsIURI* aBaseURI, nsIPrincipal* aPrincipal, + bool aLoadedAsData, nsIGlobalObject* aEventObject, DocumentFlavor aFlavor); + +inline mozilla::dom::Document* nsINode::GetOwnerDocument() const { + mozilla::dom::Document* ownerDoc = OwnerDoc(); + + return ownerDoc != this ? ownerDoc : nullptr; +} + +inline nsINode* nsINode::OwnerDocAsNode() const { return OwnerDoc(); } + +inline mozilla::dom::Document* nsINode::AsDocument() { + MOZ_ASSERT(IsDocument()); + return static_cast<mozilla::dom::Document*>(this); +} + +inline const mozilla::dom::Document* nsINode::AsDocument() const { + MOZ_ASSERT(IsDocument()); + return static_cast<const mozilla::dom::Document*>(this); +} + +inline nsISupports* ToSupports(mozilla::dom::Document* aDoc) { + return static_cast<nsINode*>(aDoc); +} + +#endif /* mozilla_dom_Document_h___ */ |