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| -rw-r--r-- | docshell/base/nsDocShell.h | 1281 |
1 files changed, 1281 insertions, 0 deletions
diff --git a/docshell/base/nsDocShell.h b/docshell/base/nsDocShell.h new file mode 100644 index 0000000000..9e0d878a7e --- /dev/null +++ b/docshell/base/nsDocShell.h @@ -0,0 +1,1281 @@ +/* -*- 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 nsDocShell_h__ +#define nsDocShell_h__ + +#include "Units.h" +#include "mozilla/Maybe.h" +#include "mozilla/ScrollbarPreferences.h" +#include "mozilla/TimelineConsumers.h" +#include "mozilla/UniquePtr.h" +#include "mozilla/WeakPtr.h" +#include "mozilla/dom/BrowsingContext.h" +#include "mozilla/dom/WindowProxyHolder.h" +#include "nsCOMPtr.h" +#include "nsCharsetSource.h" +#include "nsDocLoader.h" +#include "nsIAuthPromptProvider.h" +#include "nsIBaseWindow.h" +#include "nsIDeprecationWarner.h" +#include "nsIDocShell.h" +#include "nsIDocShellTreeItem.h" +#include "nsIInterfaceRequestor.h" +#include "nsILoadContext.h" +#include "nsINetworkInterceptController.h" +#include "nsIRefreshURI.h" +#include "nsIWebNavigation.h" +#include "nsIWebPageDescriptor.h" +#include "nsIWebProgressListener.h" +#include "nsPoint.h" // mCurrent/mDefaultScrollbarPreferences +#include "nsRect.h" +#include "nsString.h" +#include "nsThreadUtils.h" +#include "prtime.h" + +// Interfaces Needed + +namespace mozilla { +class Encoding; +class HTMLEditor; +class ObservedDocShell; +enum class TaskCategory; +namespace dom { +class ClientInfo; +class ClientSource; +class EventTarget; +class SessionHistoryInfo; +struct LoadingSessionHistoryInfo; +} // namespace dom +namespace net { +class LoadInfo; +class DocumentLoadListener; +} // namespace net +} // namespace mozilla + +class nsIContentViewer; +class nsIController; +class nsIDocShellTreeOwner; +class nsIHttpChannel; +class nsIMutableArray; +class nsIPrompt; +class nsIScrollableFrame; +class nsIStringBundle; +class nsIURIFixup; +class nsIURIFixupInfo; +class nsIURILoader; +class nsIWebBrowserFind; +class nsIWidget; +class nsIReferrerInfo; + +class nsCommandManager; +class nsDocShellEditorData; +class nsDOMNavigationTiming; +class nsDSURIContentListener; +class nsGlobalWindowOuter; + +class FramingChecker; +class OnLinkClickEvent; + +/* internally used ViewMode types */ +enum ViewMode { viewNormal = 0x0, viewSource = 0x1 }; + +enum eCharsetReloadState { + eCharsetReloadInit, + eCharsetReloadRequested, + eCharsetReloadStopOrigional +}; + +class nsDocShell final : public nsDocLoader, + public nsIDocShell, + public nsIWebNavigation, + public nsIBaseWindow, + public nsIRefreshURI, + public nsIWebProgressListener, + public nsIWebPageDescriptor, + public nsIAuthPromptProvider, + public nsILoadContext, + public nsINetworkInterceptController, + public nsIDeprecationWarner, + public mozilla::SupportsWeakPtr { + public: + enum InternalLoad : uint32_t { + INTERNAL_LOAD_FLAGS_NONE = 0x0, + INTERNAL_LOAD_FLAGS_INHERIT_PRINCIPAL = 0x1, + INTERNAL_LOAD_FLAGS_DONT_SEND_REFERRER = 0x2, + INTERNAL_LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP = 0x4, + + // This flag marks the first load in this object + // @see nsIWebNavigation::LOAD_FLAGS_FIRST_LOAD + INTERNAL_LOAD_FLAGS_FIRST_LOAD = 0x8, + + // The set of flags that should not be set before calling into + // nsDocShell::LoadURI and other nsDocShell loading functions. + INTERNAL_LOAD_FLAGS_LOADURI_SETUP_FLAGS = 0xf, + + INTERNAL_LOAD_FLAGS_BYPASS_CLASSIFIER = 0x10, + INTERNAL_LOAD_FLAGS_FORCE_ALLOW_COOKIES = 0x20, + + // Whether the load should be treated as srcdoc load, rather than a URI one. + INTERNAL_LOAD_FLAGS_IS_SRCDOC = 0x40, + + // Whether this is the load of a frame's original src attribute + INTERNAL_LOAD_FLAGS_ORIGINAL_FRAME_SRC = 0x80, + + INTERNAL_LOAD_FLAGS_NO_OPENER = 0x100, + + // Whether a top-level data URI navigation is allowed for that load + INTERNAL_LOAD_FLAGS_FORCE_ALLOW_DATA_URI = 0x200, + + // Whether the load should go through LoadURIDelegate. + INTERNAL_LOAD_FLAGS_BYPASS_LOAD_URI_DELEGATE = 0x2000, + }; + + // Event type dispatched by RestorePresentation + class RestorePresentationEvent : public mozilla::Runnable { + public: + NS_DECL_NSIRUNNABLE + explicit RestorePresentationEvent(nsDocShell* aDs) + : mozilla::Runnable("nsDocShell::RestorePresentationEvent"), + mDocShell(aDs) {} + void Revoke() { mDocShell = nullptr; } + + private: + RefPtr<nsDocShell> mDocShell; + }; + + class InterfaceRequestorProxy : public nsIInterfaceRequestor { + public: + explicit InterfaceRequestorProxy(nsIInterfaceRequestor* aRequestor); + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_NSIINTERFACEREQUESTOR + + private: + virtual ~InterfaceRequestorProxy(); + InterfaceRequestorProxy() = default; + nsWeakPtr mWeakPtr; + }; + + NS_DECL_ISUPPORTS_INHERITED + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsDocShell, nsDocLoader) + NS_DECL_NSIDOCSHELL + NS_DECL_NSIDOCSHELLTREEITEM + NS_DECL_NSIWEBNAVIGATION + NS_DECL_NSIBASEWINDOW + NS_DECL_NSIINTERFACEREQUESTOR + NS_DECL_NSIWEBPROGRESSLISTENER + NS_DECL_NSIREFRESHURI + NS_DECL_NSIWEBPAGEDESCRIPTOR + NS_DECL_NSIAUTHPROMPTPROVIDER + NS_DECL_NSINETWORKINTERCEPTCONTROLLER + NS_DECL_NSIDEPRECATIONWARNER + + // Create a new nsDocShell object. + static already_AddRefed<nsDocShell> Create( + mozilla::dom::BrowsingContext* aBrowsingContext, + uint64_t aContentWindowID = 0); + + bool Initialize(); + + NS_IMETHOD Stop() override { + // Need this here because otherwise nsIWebNavigation::Stop + // overrides the docloader's Stop() + return nsDocLoader::Stop(); + } + + mozilla::ScrollbarPreference ScrollbarPreference() const { + return mScrollbarPref; + } + void SetScrollbarPreference(mozilla::ScrollbarPreference); + + /* + * The size, in CSS pixels, of the margins for the <body> of an HTML document + * in this docshell; used to implement the marginwidth attribute on HTML + * <frame>/<iframe> elements. A value smaller than zero indicates that the + * attribute was not set. + */ + const mozilla::CSSIntSize& GetFrameMargins() const { return mFrameMargins; } + + bool UpdateFrameMargins(const mozilla::CSSIntSize& aMargins) { + if (mFrameMargins == aMargins) { + return false; + } + mFrameMargins = aMargins; + return true; + } + + /** + * Process a click on a link. + * + * @param aContent the content object used for triggering the link. + * @param aURI a URI object that defines the destination for the link + * @param aTargetSpec indicates where the link is targeted (may be an empty + * string) + * @param aFileName non-null when the link should be downloaded as the given + * file + * @param aPostDataStream the POST data to send + * @param aHeadersDataStream ??? (only used for plugins) + * @param aIsTrusted false if the triggerer is an untrusted DOM event. + * @param aTriggeringPrincipal, if not passed explicitly we fall back to + * the document's principal. + * @param aCsp, the CSP to be used for the load, that is the CSP of the + * entity responsible for causing the load to occur. Most likely + * this is the CSP of the document that started the load. In case + * aCsp was not passed explicitly we fall back to using + * aContent's document's CSP if that document holds any. + */ + nsresult OnLinkClick(nsIContent* aContent, nsIURI* aURI, + const nsAString& aTargetSpec, const nsAString& aFileName, + nsIInputStream* aPostDataStream, + nsIInputStream* aHeadersDataStream, + bool aIsUserTriggered, bool aIsTrusted, + nsIPrincipal* aTriggeringPrincipal, + nsIContentSecurityPolicy* aCsp); + /** + * Process a click on a link. + * + * Works the same as OnLinkClick() except it happens immediately rather than + * through an event. + * + * @param aContent the content object used for triggering the link. + * @param aDocShellLoadState the extended load info for this load. + * @param aNoOpenerImplied if the link implies "noopener" + * @param aTriggeringPrincipal, if not passed explicitly we fall back to + * the document's principal. + */ + nsresult OnLinkClickSync(nsIContent* aContent, + nsDocShellLoadState* aLoadState, + bool aNoOpenerImplied, + nsIPrincipal* aTriggeringPrincipal); + + /** + * Process a mouse-over a link. + * + * @param aContent the linked content. + * @param aURI an URI object that defines the destination for the link + * @param aTargetSpec indicates where the link is targeted (it may be an empty + * string) + */ + nsresult OnOverLink(nsIContent* aContent, nsIURI* aURI, + const nsAString& aTargetSpec); + /** + * Process the mouse leaving a link. + */ + nsresult OnLeaveLink(); + + // Don't use NS_DECL_NSILOADCONTEXT because some of nsILoadContext's methods + // are shared with nsIDocShell and can't be declared twice. + NS_IMETHOD GetAssociatedWindow(mozIDOMWindowProxy**) override; + NS_IMETHOD GetTopWindow(mozIDOMWindowProxy**) override; + NS_IMETHOD GetTopFrameElement(mozilla::dom::Element**) override; + NS_IMETHOD GetIsContent(bool*) override; + NS_IMETHOD GetUsePrivateBrowsing(bool*) override; + NS_IMETHOD SetUsePrivateBrowsing(bool) override; + NS_IMETHOD SetPrivateBrowsing(bool) override; + NS_IMETHOD GetUseRemoteTabs(bool*) override; + NS_IMETHOD SetRemoteTabs(bool) override; + NS_IMETHOD GetUseRemoteSubframes(bool*) override; + NS_IMETHOD SetRemoteSubframes(bool) override; + NS_IMETHOD GetScriptableOriginAttributes( + JSContext*, JS::MutableHandle<JS::Value>) override; + NS_IMETHOD_(void) + GetOriginAttributes(mozilla::OriginAttributes& aAttrs) override; + + // Restores a cached presentation from history (mLSHE). + // This method swaps out the content viewer and simulates loads for + // subframes. It then simulates the completion of the toplevel load. + nsresult RestoreFromHistory(); + + // Perform a URI load from a refresh timer. This is just like the + // ForceRefreshURI method on nsIRefreshURI, but makes sure to take + // the timer involved out of mRefreshURIList if it's there. + // aTimer must not be null. + nsresult ForceRefreshURIFromTimer(nsIURI* aURI, nsIPrincipal* aPrincipal, + int32_t aDelay, bool aMetaRefresh, + nsITimer* aTimer); + + // We need dummy OnLocationChange in some cases to update the UI without + // updating security info. + void FireDummyOnLocationChange() { + FireOnLocationChange(this, nullptr, mCurrentURI, + LOCATION_CHANGE_SAME_DOCUMENT); + } + + // This function is created exclusively for dom.background_loading_iframe is + // set. As soon as the current DocShell knows itself can be treated as + // background loading, it triggers the parent docshell to see if the parent + // document can fire load event earlier. + void TriggerParentCheckDocShellIsEmpty(); + + nsresult HistoryEntryRemoved(int32_t aIndex); + + // Notify Scroll observers when an async panning/zooming transform + // has started being applied + MOZ_CAN_RUN_SCRIPT_BOUNDARY + void NotifyAsyncPanZoomStarted(); + + // Notify Scroll observers when an async panning/zooming transform + // is no longer applied + MOZ_CAN_RUN_SCRIPT_BOUNDARY + void NotifyAsyncPanZoomStopped(); + + void SetInFrameSwap(bool aInSwap) { mInFrameSwap = aInSwap; } + bool InFrameSwap(); + + const mozilla::Encoding* GetForcedCharset() { return mForcedCharset; } + + bool GetForcedAutodetection() { return mForcedAutodetection; } + + mozilla::HTMLEditor* GetHTMLEditorInternal(); + nsresult SetHTMLEditorInternal(mozilla::HTMLEditor* aHTMLEditor); + + // Handle page navigation due to charset changes + nsresult CharsetChangeReloadDocument(const char* aCharset = nullptr, + int32_t aSource = kCharsetUninitialized); + nsresult CharsetChangeStopDocumentLoad(); + + nsDOMNavigationTiming* GetNavigationTiming() const; + + nsresult SetOriginAttributes(const mozilla::OriginAttributes& aAttrs); + + const mozilla::OriginAttributes& GetOriginAttributes() { + return mBrowsingContext->OriginAttributesRef(); + } + + // Determine whether this docshell corresponds to the given history entry, + // via having a pointer to it in mOSHE or mLSHE. + bool HasHistoryEntry(nsISHEntry* aEntry) const { + return aEntry && (aEntry == mOSHE || aEntry == mLSHE); + } + + // Update any pointers (mOSHE or mLSHE) to aOldEntry to point to aNewEntry + void SwapHistoryEntries(nsISHEntry* aOldEntry, nsISHEntry* aNewEntry); + + bool GetCreatedDynamically() const { + return mBrowsingContext && mBrowsingContext->CreatedDynamically(); + } + + mozilla::gfx::Matrix5x4* GetColorMatrix() { return mColorMatrix.get(); } + + static bool SandboxFlagsImplyCookies(const uint32_t& aSandboxFlags); + + // Tell the favicon service that aNewURI has the same favicon as aOldURI. + static void CopyFavicon(nsIURI* aOldURI, nsIURI* aNewURI, + bool aInPrivateBrowsing); + + static nsDocShell* Cast(nsIDocShell* aDocShell) { + return static_cast<nsDocShell*>(aDocShell); + } + + static bool CanLoadInParentProcess(nsIURI* aURI); + + // Returns true if the current load is a force reload (started by holding + // shift while triggering reload) + bool IsForceReloading(); + + mozilla::dom::WindowProxyHolder GetWindowProxy() { + EnsureScriptEnvironment(); + return mozilla::dom::WindowProxyHolder(mBrowsingContext); + } + + /** + * Loads the given URI. See comments on nsDocShellLoadState members for more + * information on information used. + * `aCacheKey` gets passed to DoURILoad call. + */ + MOZ_CAN_RUN_SCRIPT_BOUNDARY + nsresult InternalLoad( + nsDocShellLoadState* aLoadState, + mozilla::Maybe<uint32_t> aCacheKey = mozilla::Nothing()); + + // Clear the document's storage access flag if needed. + void MaybeClearStorageAccessFlag(); + + void MaybeRestoreWindowName(); + + void StoreWindowNameToSHEntries(); + + void SetWillChangeProcess() { mWillChangeProcess = true; } + bool WillChangeProcess() { return mWillChangeProcess; } + + // Create a content viewer within this nsDocShell for the given + // `WindowGlobalChild` actor. + nsresult CreateContentViewerForActor( + mozilla::dom::WindowGlobalChild* aWindowActor); + + // Creates a real network channel (not a DocumentChannel) using the specified + // parameters. + // Used by nsDocShell when not using DocumentChannel, by DocumentLoadListener + // (parent-process DocumentChannel), and by DocumentChannelChild/ContentChild + // to transfer the resulting channel into the final process. + static nsresult CreateRealChannelForDocument( + nsIChannel** aChannel, nsIURI* aURI, nsILoadInfo* aLoadInfo, + nsIInterfaceRequestor* aCallbacks, nsLoadFlags aLoadFlags, + const nsAString& aSrcdoc, nsIURI* aBaseURI); + + // Creates a real (not DocumentChannel) channel, and configures it using the + // supplied nsDocShellLoadState. + // Configuration options here are ones that should be applied to only the + // real channel, especially ones that need to QI to channel subclasses. + static bool CreateAndConfigureRealChannelForLoadState( + mozilla::dom::BrowsingContext* aBrowsingContext, + nsDocShellLoadState* aLoadState, mozilla::net::LoadInfo* aLoadInfo, + nsIInterfaceRequestor* aCallbacks, nsDocShell* aDocShell, + const mozilla::OriginAttributes& aOriginAttributes, + nsLoadFlags aLoadFlags, uint32_t aCacheKey, nsresult& rv, + nsIChannel** aChannel); + + // This is used to deal with errors resulting from a failed page load. + // Errors are handled as follows: + // 1. Check to see if it's a file not found error or bad content + // encoding error. + // 2. Send the URI to a keyword server (if enabled) + // 3. If the error was DNS failure, then add www and .com to the URI + // (if appropriate). + // 4. If the www .com additions don't work, try those with an HTTPS scheme + // (if appropriate). + static already_AddRefed<nsIURI> AttemptURIFixup( + nsIChannel* aChannel, nsresult aStatus, + const mozilla::Maybe<nsCString>& aOriginalURIString, uint32_t aLoadType, + bool aIsTopFrame, bool aAllowKeywordFixup, bool aUsePrivateBrowsing, + bool aNotifyKeywordSearchLoading = false, + nsIInputStream** aNewPostData = nullptr); + + static already_AddRefed<nsIURI> MaybeFixBadCertDomainErrorURI( + nsIChannel* aChannel, nsIURI* aUrl); + + // Takes aStatus and filters out results that should not display + // an error page. + // If this returns a failed result, then we should display an error + // page with that result. + // aSkippedUnknownProtocolNavigation will be set to true if we chose + // to skip displaying an error page for an NS_ERROR_UNKNOWN_PROTOCOL + // navigation. + static nsresult FilterStatusForErrorPage( + nsresult aStatus, nsIChannel* aChannel, uint32_t aLoadType, + bool aIsTopFrame, bool aUseErrorPages, bool aIsInitialDocument, + bool* aSkippedUnknownProtocolNavigation = nullptr); + + // Notify consumers of a search being loaded through the observer service: + static void MaybeNotifyKeywordSearchLoading(const nsString& aProvider, + const nsString& aKeyword); + + nsDocShell* GetInProcessChildAt(int32_t aIndex); + + static bool ShouldAddURIVisit(nsIChannel* aChannel); + + /** + * Helper function that finds the last URI and its transition flags for a + * channel. + * + * This method first checks the channel's property bag to see if previous + * info has been saved. If not, it gives back the referrer of the channel. + * + * @param aChannel + * The channel we are transitioning to + * @param aURI + * Output parameter with the previous URI, not addref'd + * @param aChannelRedirectFlags + * If a redirect, output parameter with the previous redirect flags + * from nsIChannelEventSink + */ + static void ExtractLastVisit(nsIChannel* aChannel, nsIURI** aURI, + uint32_t* aChannelRedirectFlags); + + bool HasContentViewer() const { return !!mContentViewer; } + + static uint32_t ComputeURILoaderFlags( + mozilla::dom::BrowsingContext* aBrowsingContext, uint32_t aLoadType); + + void SetLoadingSessionHistoryInfo( + const mozilla::dom::LoadingSessionHistoryInfo& aLoadingInfo); + + already_AddRefed<nsIInputStream> GetPostDataFromCurrentEntry() const; + mozilla::Maybe<uint32_t> GetCacheKeyFromCurrentEntry() const; + + // Loading and/or active entries are only set when pref + // fission.sessionHistoryInParent is on. + bool FillLoadStateFromCurrentEntry(nsDocShellLoadState& aLoadState); + + static bool ShouldAddToSessionHistory(nsIURI* aURI, nsIChannel* aChannel); + + bool IsOSHE(nsISHEntry* aEntry) const { return mOSHE == aEntry; } + + mozilla::dom::ChildSHistory* GetSessionHistory() { + return mBrowsingContext->GetChildSessionHistory(); + } + + // This returns true only when using session history in parent. + bool IsLoadingFromSessionHistory(); + + private: // member functions + friend class nsDSURIContentListener; + friend class FramingChecker; + friend class OnLinkClickEvent; + friend class nsIDocShell; + friend class mozilla::dom::BrowsingContext; + friend class mozilla::net::DocumentLoadListener; + friend class nsGlobalWindowOuter; + + // It is necessary to allow adding a timeline marker wherever a docshell + // instance is available. This operation happens frequently and needs to + // be very fast, so instead of using a Map or having to search for some + // docshell-specific markers storage, a pointer to an `ObservedDocShell` is + // is stored on docshells directly. + friend void mozilla::TimelineConsumers::AddConsumer(nsDocShell*); + friend void mozilla::TimelineConsumers::RemoveConsumer(nsDocShell*); + friend void mozilla::TimelineConsumers::AddMarkerForDocShell( + nsDocShell*, const char*, MarkerTracingType, MarkerStackRequest); + friend void mozilla::TimelineConsumers::AddMarkerForDocShell( + nsDocShell*, const char*, const TimeStamp&, MarkerTracingType, + MarkerStackRequest); + friend void mozilla::TimelineConsumers::AddMarkerForDocShell( + nsDocShell*, UniquePtr<AbstractTimelineMarker>&&); + friend void mozilla::TimelineConsumers::PopMarkers( + nsDocShell*, JSContext*, nsTArray<dom::ProfileTimelineMarker>&); + + nsDocShell(mozilla::dom::BrowsingContext* aBrowsingContext, + uint64_t aContentWindowID); + + // Security check to prevent frameset spoofing. See comments at + // implementation site. + static bool ValidateOrigin(mozilla::dom::BrowsingContext* aOrigin, + mozilla::dom::BrowsingContext* aTarget); + + static inline uint32_t PRTimeToSeconds(PRTime aTimeUsec) { + return uint32_t(aTimeUsec / PR_USEC_PER_SEC); + } + + virtual ~nsDocShell(); + + // + // nsDocLoader + // + + virtual void DestroyChildren() override; + + // Overridden from nsDocLoader, this provides more information than the + // normal OnStateChange with flags STATE_REDIRECTING + virtual void OnRedirectStateChange(nsIChannel* aOldChannel, + nsIChannel* aNewChannel, + uint32_t aRedirectFlags, + uint32_t aStateFlags) override; + + // Override the parent setter from nsDocLoader + virtual nsresult SetDocLoaderParent(nsDocLoader* aLoader) override; + + // + // Content Viewer Management + // + + nsresult EnsureContentViewer(); + + // aPrincipal can be passed in if the caller wants. If null is + // passed in, the about:blank principal will end up being used. + // aCSP, if any, will be used for the new about:blank load. + nsresult CreateAboutBlankContentViewer( + nsIPrincipal* aPrincipal, nsIPrincipal* aPartitionedPrincipal, + nsIContentSecurityPolicy* aCSP, nsIURI* aBaseURI, + const mozilla::Maybe<nsILoadInfo::CrossOriginEmbedderPolicy>& aCOEP = + mozilla::Nothing(), + bool aTryToSaveOldPresentation = true, bool aCheckPermitUnload = true, + mozilla::dom::WindowGlobalChild* aActor = nullptr); + + nsresult CreateContentViewer(const nsACString& aContentType, + nsIRequest* aRequest, + nsIStreamListener** aContentHandler); + + nsresult NewContentViewerObj(const nsACString& aContentType, + nsIRequest* aRequest, nsILoadGroup* aLoadGroup, + nsIStreamListener** aContentHandler, + nsIContentViewer** aViewer); + + already_AddRefed<nsILoadURIDelegate> GetLoadURIDelegate(); + + nsresult SetupNewViewer( + nsIContentViewer* aNewViewer, + mozilla::dom::WindowGlobalChild* aWindowActor = nullptr); + + // + // Session History + // + + // Either aChannel or aOwner must be null. If aChannel is + // present, the owner should be gotten from it. + // If aCloneChildren is true, then our current session history's + // children will be cloned onto the new entry. This should be + // used when we aren't actually changing the document while adding + // the new session history entry. + // aCsp is the CSP to be used for the load. That is *not* the CSP + // that will be applied to subresource loads within that document + // but the CSP for the document load itself. E.g. if that CSP + // includes upgrade-insecure-requests, then the new top-level load + // will be upgraded to HTTPS. + nsresult AddToSessionHistory(nsIURI* aURI, nsIChannel* aChannel, + nsIPrincipal* aTriggeringPrincipal, + nsIPrincipal* aPrincipalToInherit, + nsIPrincipal* aPartitionedPrincipalToInherit, + nsIContentSecurityPolicy* aCsp, + bool aCloneChildren, nsISHEntry** aNewEntry); + + void UpdateActiveEntry( + bool aReplace, const mozilla::Maybe<nsPoint>& aPreviousScrollPos, + nsIURI* aURI, nsIURI* aOriginalURI, nsIPrincipal* aTriggeringPrincipal, + nsIContentSecurityPolicy* aCsp, const nsAString& aTitle, + bool aScrollRestorationIsManual, nsIStructuredCloneContainer* aData, + bool aURIWasModified); + + nsresult AddChildSHEntry(nsISHEntry* aCloneRef, nsISHEntry* aNewEntry, + int32_t aChildOffset, uint32_t aLoadType, + bool aCloneChildren); + + nsresult AddChildSHEntryToParent(nsISHEntry* aNewEntry, int32_t aChildOffset, + bool aCloneChildren); + + // Call this method to swap in a new history entry to m[OL]SHE, rather than + // setting it directly. This completes the navigation in all docshells + // in the case of a subframe navigation. + // Returns old mOSHE/mLSHE. + already_AddRefed<nsISHEntry> SetHistoryEntry(nsCOMPtr<nsISHEntry>* aPtr, + nsISHEntry* aEntry); + + // This method calls SetHistoryEntry and updates mOSHE and mLSHE in BC to be + // the same as in docshell + void SetHistoryEntryAndUpdateBC(const mozilla::Maybe<nsISHEntry*>& aLSHE, + const mozilla::Maybe<nsISHEntry*>& aOSHE); + + // If aNotifiedBeforeUnloadListeners is true, "beforeunload" event listeners + // were notified by the caller and given the chance to abort the navigation, + // and should not be notified again. + static nsresult ReloadDocument( + nsDocShell* aDocShell, mozilla::dom::Document* aDocument, + uint32_t aLoadType, mozilla::dom::BrowsingContext* aBrowsingContext, + nsIURI* aCurrentURI, nsIReferrerInfo* aReferrerInfo, + bool aNotifiedBeforeUnloadListeners = false); + + // + // URI Load + // + + // Actually open a channel and perform a URI load. Callers need to pass a + // non-null aLoadState->TriggeringPrincipal() which initiated the URI load. + // Please note that the TriggeringPrincipal will be used for performing + // security checks. If aLoadState->URI() is provided by the web, then please + // do not pass a SystemPrincipal as the triggeringPrincipal. If + // aLoadState()->PrincipalToInherit is null, then no inheritance of any sort + // will happen and the load will get a principal based on the URI being + // loaded. If the Srcdoc flag is set (INTERNAL_LOAD_FLAGS_IS_SRCDOC), the load + // will be considered as a srcdoc load, and the contents of Srcdoc will be + // loaded instead of the URI. aLoadState->OriginalURI() will be set as the + // originalURI on the channel that does the load. If OriginalURI is null, URI + // will be set as the originalURI. If LoadReplace is true, LOAD_REPLACE flag + // will be set on the nsIChannel. + // If `aCacheKey` is supplied, use it for the session history entry. + nsresult DoURILoad(nsDocShellLoadState* aLoadState, + mozilla::Maybe<uint32_t> aCacheKey, nsIRequest** aRequest); + + static nsresult AddHeadersToChannel(nsIInputStream* aHeadersData, + nsIChannel* aChannel); + + nsresult OpenInitializedChannel(nsIChannel* aChannel, + nsIURILoader* aURILoader, + uint32_t aOpenFlags); + nsresult OpenRedirectedChannel(nsDocShellLoadState* aLoadState); + + void UpdateMixedContentChannelForNewLoad(nsIChannel* aChannel); + + MOZ_CAN_RUN_SCRIPT + nsresult ScrollToAnchor(bool aCurHasRef, bool aNewHasRef, + nsACString& aNewHash, uint32_t aLoadType); + + private: + // Returns true if would have called FireOnLocationChange, + // but did not because aFireOnLocationChange was false on entry. + // In this case it is the caller's responsibility to ensure + // FireOnLocationChange is called. + // In all other cases false is returned. + // Either aChannel or aTriggeringPrincipal must be null. If aChannel is + // present, the owner should be gotten from it. + // If OnNewURI calls AddToSessionHistory, it will pass its + // aCloneSHChildren argument as aCloneChildren. + // aCsp is the CSP to be used for the load. That is *not* the CSP + // that will be applied to subresource loads within that document + // but the CSP for the document load itself. E.g. if that CSP + // includes upgrade-insecure-requests, then the new top-level load + // will be upgraded to HTTPS. + bool OnNewURI(nsIURI* aURI, nsIChannel* aChannel, + nsIPrincipal* aTriggeringPrincipal, + nsIPrincipal* aPrincipalToInherit, + nsIPrincipal* aPartitionedPrincipalToInehrit, + nsIContentSecurityPolicy* aCsp, bool aFireOnLocationChange, + bool aAddToGlobalHistory, bool aCloneSHChildren); + + public: + // Helper method that is called when a new document (including any + // sub-documents - ie. frames) has been completely loaded. + MOZ_CAN_RUN_SCRIPT_BOUNDARY + nsresult EndPageLoad(nsIWebProgress* aProgress, nsIChannel* aChannel, + nsresult aResult); + + // Builds an error page URI (e.g. about:neterror?etc) for the given aURI + // and displays it via the LoadErrorPage() overload below. + nsresult LoadErrorPage(nsIURI* aURI, const char16_t* aURL, + const char* aErrorPage, const char* aErrorType, + const char16_t* aDescription, const char* aCSSClass, + nsIChannel* aFailedChannel); + + // This method directly loads aErrorURI as an error page. aFailedURI and + // aFailedChannel come from DisplayLoadError() or the LoadErrorPage() overload + // above. + nsresult LoadErrorPage(nsIURI* aErrorURI, nsIURI* aFailedURI, + nsIChannel* aFailedChannel); + + bool DisplayLoadError(nsresult aError, nsIURI* aURI, const char16_t* aURL, + nsIChannel* aFailedChannel) { + bool didDisplayLoadError = false; + DisplayLoadError(aError, aURI, aURL, aFailedChannel, &didDisplayLoadError); + return didDisplayLoadError; + } + + // + // Uncategorized + // + + // Get the principal that we'll set on the channel if we're inheriting. If + // aConsiderCurrentDocument is true, we try to use the current document if + // at all possible. If that fails, we fall back on the parent document. + // If that fails too, we force creation of a content viewer and use the + // resulting principal. If aConsiderCurrentDocument is false, we just look + // at the parent. + // If aConsiderPartitionedPrincipal is true, we consider the partitioned + // principal instead of the node principal. + nsIPrincipal* GetInheritedPrincipal( + bool aConsiderCurrentDocument, + bool aConsiderPartitionedPrincipal = false); + + /** + * Helper function that caches a URI and a transition for saving later. + * + * @param aChannel + * Channel that will have these properties saved + * @param aURI + * The URI to save for later + * @param aChannelRedirectFlags + * The nsIChannelEventSink redirect flags to save for later + */ + static void SaveLastVisit(nsIChannel* aChannel, nsIURI* aURI, + uint32_t aChannelRedirectFlags); + + /** + * Helper function for adding a URI visit using IHistory. + * + * The IHistory API maintains chains of visits, tracking both HTTP referrers + * and redirects for a user session. VisitURI requires the current URI and + * the previous URI in the chain. + * + * Visits can be saved either during a redirect or when the request has + * reached its final destination. The previous URI in the visit may be + * from another redirect. + * + * @pre aURI is not null. + * + * @param aURI + * The URI that was just visited + * @param aPreviousURI + * The previous URI of this visit + * @param aChannelRedirectFlags + * For redirects, the redirect flags from nsIChannelEventSink + * (0 otherwise) + * @param aResponseStatus + * For HTTP channels, the response code (0 otherwise). + */ + void AddURIVisit(nsIURI* aURI, nsIURI* aPreviousURI, + uint32_t aChannelRedirectFlags, + uint32_t aResponseStatus = 0); + + /** + * Internal helper funtion + */ + static void InternalAddURIVisit( + nsIURI* aURI, nsIURI* aPreviousURI, uint32_t aChannelRedirectFlags, + uint32_t aResponseStatus, mozilla::dom::BrowsingContext* aBrowsingContext, + nsIWidget* aWidget, uint32_t aLoadType); + + static already_AddRefed<nsIURIFixupInfo> KeywordToURI( + const nsACString& aKeyword, bool aIsPrivateContext); + + // Sets the current document's current state object to the given SHEntry's + // state object. The current state object is eventually given to the page + // in the PopState event. + void SetDocCurrentStateObj(nsISHEntry* aShEntry, + mozilla::dom::SessionHistoryInfo* aInfo); + + // Returns true if would have called FireOnLocationChange, + // but did not because aFireOnLocationChange was false on entry. + // In this case it is the caller's responsibility to ensure + // FireOnLocationChange is called. + // In all other cases false is returned. + bool SetCurrentURI(nsIURI* aURI, nsIRequest* aRequest, + bool aFireOnLocationChange, uint32_t aLocationFlags); + + // The following methods deal with saving and restoring content viewers + // in session history. + + // mContentViewer points to the current content viewer associated with + // this docshell. When loading a new document, the content viewer is + // either destroyed or stored into a session history entry. To make sure + // that destruction happens in a controlled fashion, a given content viewer + // is always owned in exactly one of these ways: + // 1) The content viewer is active and owned by a docshell's + // mContentViewer. + // 2) The content viewer is still being displayed while we begin loading + // a new document. The content viewer is owned by the _new_ + // content viewer's mPreviousViewer, and has a pointer to the + // nsISHEntry where it will eventually be stored. The content viewer + // has been close()d by the docshell, which detaches the document from + // the window object. + // 3) The content viewer is cached in session history. The nsISHEntry + // has the only owning reference to the content viewer. The viewer + // has released its nsISHEntry pointer to prevent circular ownership. + // + // When restoring a content viewer from session history, open() is called + // to reattach the document to the window object. The content viewer is + // then placed into mContentViewer and removed from the history entry. + // (mContentViewer is put into session history as described above, if + // applicable). + + // Determines whether we can safely cache the current mContentViewer in + // session history. This checks a number of factors such as cache policy, + // pending requests, and unload handlers. + // |aLoadType| should be the load type that will replace the current + // presentation. |aNewRequest| should be the request for the document to + // be loaded in place of the current document, or null if such a request + // has not been created yet. |aNewDocument| should be the document that will + // replace the current document. + bool CanSavePresentation(uint32_t aLoadType, nsIRequest* aNewRequest, + mozilla::dom::Document* aNewDocument); + + void ReportBFCacheComboTelemetry(uint16_t aCombo); + + // Captures the state of the supporting elements of the presentation + // (the "window" object, docshell tree, meta-refresh loads, and security + // state) and stores them on |mOSHE|. + nsresult CaptureState(); + + // Begin the toplevel restore process for |aSHEntry|. + // This simulates a channel open, and defers the real work until + // RestoreFromHistory is called from a PLEvent. + nsresult RestorePresentation(nsISHEntry* aSHEntry, bool* aRestoring); + + // Call BeginRestore(nullptr, false) for each child of this shell. + nsresult BeginRestoreChildren(); + + // Method to get our current position and size without flushing + void DoGetPositionAndSize(int32_t* aX, int32_t* aY, int32_t* aWidth, + int32_t* aHeight); + + // Call this when a URI load is handed to us (via OnLinkClick or + // InternalLoad). This makes sure that we're not inside unload, or that if + // we are it's still OK to load this URI. + bool IsOKToLoadURI(nsIURI* aURI); + + // helpers for executing commands + nsresult GetControllerForCommand(const char* aCommand, + nsIController** aResult); + + // Possibly create a ClientSource object to represent an initial about:blank + // window that has not been allocated yet. Normally we try not to create + // this about:blank window until something calls GetDocument(). We still need + // the ClientSource to exist for this conceptual window, though. + // + // The ClientSource is created with the given principal if specified. If + // the principal is not provided we will attempt to inherit it when we + // are sure it will match what the real about:blank window principal + // would have been. There are some corner cases where we cannot easily + // determine the correct principal and will not create the ClientSource. + // In these cases the initial about:blank will appear to not exist until + // its real document and window are created. + void MaybeCreateInitialClientSource(nsIPrincipal* aPrincipal = nullptr); + + // Determine if a service worker is allowed to control a window in this + // docshell with the given URL. If there are any reasons it should not, + // this will return false. If true is returned then the window *may* be + // controlled. The caller must still consult either the parent controller + // or the ServiceWorkerManager to determine if a service worker should + // actually control the window. + bool ServiceWorkerAllowedToControlWindow(nsIPrincipal* aPrincipal, + nsIURI* aURI); + + // Return the ClientInfo for the initial about:blank window, if it exists + // or we have speculatively created a ClientSource in + // MaybeCreateInitialClientSource(). This can return a ClientInfo object + // even if GetExtantDoc() returns nullptr. + mozilla::Maybe<mozilla::dom::ClientInfo> GetInitialClientInfo() const; + + /** + * Initializes mTiming if it isn't yet. + * After calling this, mTiming is non-null. This method returns true if the + * initialization of the Timing can be reset (basically this is true if a new + * Timing object is created). + * In case the loading is aborted, MaybeResetInitTiming() can be called + * passing the return value of MaybeInitTiming(): if it's possible to reset + * the Timing, this method will do it. + */ + [[nodiscard]] bool MaybeInitTiming(); + void MaybeResetInitTiming(bool aReset); + + // Convenience method for getting our parent docshell. Can return null + already_AddRefed<nsDocShell> GetInProcessParentDocshell(); + + // Internal implementation of nsIDocShell::FirePageHideNotification. + // If aSkipCheckingDynEntries is true, it will not try to remove dynamic + // subframe entries. This is to avoid redundant RemoveDynEntries calls in all + // children docshells. + void FirePageHideNotificationInternal(bool aIsUnload, + bool aSkipCheckingDynEntries); + + nsresult Dispatch(mozilla::TaskCategory aCategory, + already_AddRefed<nsIRunnable>&& aRunnable); + + void SetupReferrerInfoFromChannel(nsIChannel* aChannel); + void SetReferrerInfo(nsIReferrerInfo* aReferrerInfo); + void ReattachEditorToWindow(nsISHEntry* aSHEntry); + void RecomputeCanExecuteScripts(); + void ClearFrameHistory(nsISHEntry* aEntry); + // Determine if this type of load should update history. + static bool ShouldUpdateGlobalHistory(uint32_t aLoadType); + void UpdateGlobalHistoryTitle(nsIURI* aURI); + bool IsFrame() { return mBrowsingContext->IsFrame(); } + bool CanSetOriginAttributes(); + bool ShouldBlockLoadingForBackButton(); + bool ShouldDiscardLayoutState(nsIHttpChannel* aChannel); + bool HasUnloadedParent(); + bool JustStartedNetworkLoad(); + bool NavigationBlockedByPrinting(bool aDisplayErrorDialog = true); + bool IsNavigationAllowed(bool aDisplayPrintErrorDialog = true, + bool aCheckIfUnloadFired = true); + nsIScrollableFrame* GetRootScrollFrame(); + nsIChannel* GetCurrentDocChannel(); + nsresult EnsureScriptEnvironment(); + nsresult EnsureEditorData(); + nsresult EnsureTransferableHookData(); + nsresult EnsureFind(); + nsresult EnsureCommandHandler(); + nsresult RefreshURIFromQueue(); + nsresult Embed(nsIContentViewer* aContentViewer, + mozilla::dom::WindowGlobalChild* aWindowActor, + bool aIsTransientAboutBlank, bool aPersist); + nsPresContext* GetEldestPresContext(); + nsresult CheckLoadingPermissions(); + nsresult LoadHistoryEntry(nsISHEntry* aEntry, uint32_t aLoadType); + nsresult LoadHistoryEntry( + const mozilla::dom::LoadingSessionHistoryInfo& aEntry, + uint32_t aLoadType); + nsresult LoadHistoryEntry(nsDocShellLoadState* aLoadState, uint32_t aLoadType, + bool aReloadingActiveEntry); + nsresult GetHttpChannel(nsIChannel* aChannel, nsIHttpChannel** aReturn); + nsresult ConfirmRepost(bool* aRepost); + nsresult GetPromptAndStringBundle(nsIPrompt** aPrompt, + nsIStringBundle** aStringBundle); + nsresult SetCurScrollPosEx(int32_t aCurHorizontalPos, + int32_t aCurVerticalPos); + nsPoint GetCurScrollPos(); + + already_AddRefed<mozilla::dom::ChildSHistory> GetRootSessionHistory(); + + bool CSSErrorReportingEnabled() const { return mCSSErrorReportingEnabled; } + + // Handles retrieval of subframe session history for nsDocShell::LoadURI. If a + // load is requested in a subframe of the current DocShell, the subframe + // loadType may need to reflect the loadType of the parent document, or in + // some cases (like reloads), the history load may need to be cancelled. See + // function comments for in-depth logic descriptions. + // Returns true if the method itself deals with the load. + bool MaybeHandleSubframeHistory(nsDocShellLoadState* aLoadState, + bool aContinueHandlingSubframeHistory); + + // If we are passed a named target during InternalLoad, this method handles + // moving the load to the browsing context the target name resolves to. + nsresult PerformRetargeting(nsDocShellLoadState* aLoadState); + + // Returns one of nsIContentPolicy::TYPE_DOCUMENT, + // nsIContentPolicy::TYPE_INTERNAL_IFRAME, or + // nsIContentPolicy::TYPE_INTERNAL_FRAME depending on who is responsible for + // this docshell. + nsContentPolicyType DetermineContentType(); + + // If this is an iframe, and the embedder is OOP, then notifes the + // embedder that loading has finished and we shouldn't be blocking + // load of the embedder. Only called when we fail to load, as we wait + // for the load event of our Document before notifying success. + // + // If aFireFrameErrorEvent is true, then fires an error event at the + // embedder element, for both in-process and OOP embedders. + void UnblockEmbedderLoadEventForFailure(bool aFireFrameErrorEvent = false); + + struct SameDocumentNavigationState { + nsAutoCString mCurrentHash; + nsAutoCString mNewHash; + bool mCurrentURIHasRef = false; + bool mNewURIHasRef = false; + bool mSameExceptHashes = false; + bool mHistoryNavBetweenSameDoc = false; + }; + + // Check to see if we're loading a prior history entry or doing a fragment + // navigation in the same document. + bool IsSameDocumentNavigation(nsDocShellLoadState* aLoadState, + SameDocumentNavigationState& aState); + + // ... If so, handle the scrolling or other action required instead of + // continuing with new document navigation. + MOZ_CAN_RUN_SCRIPT + nsresult HandleSameDocumentNavigation(nsDocShellLoadState* aLoadState, + SameDocumentNavigationState& aState); + + // Called when the Private Browsing state of a nsDocShell changes. + void NotifyPrivateBrowsingChanged(); + + // Internal helpers for BrowsingContext to pass update values to nsIDocShell's + // LoadGroup. + void SetLoadGroupDefaultLoadFlags(nsLoadFlags aLoadFlags); + + void SetTitleOnHistoryEntry(); + + void SetScrollRestorationIsManualOnHistoryEntry(nsISHEntry* aSHEntry, + bool aIsManual); + + void SetCacheKeyOnHistoryEntry(nsISHEntry* aSHEntry, uint32_t aCacheKey); + + nsresult LoadURI(nsDocShellLoadState* aLoadState, bool aSetNavigating, + bool aContinueHandlingSubframeHistory); + + // Sets the active entry to the current loading entry. aPersist is used in the + // case a new session history entry is added to the session history. + void MoveLoadingToActiveEntry(bool aPersist); + + void ActivenessMaybeChanged(); + + private: // data members + nsString mTitle; + nsCString mOriginalUriString; + nsTObserverArray<nsWeakPtr> mPrivacyObservers; + nsTObserverArray<nsWeakPtr> mReflowObservers; + nsTObserverArray<nsWeakPtr> mScrollObservers; + mozilla::UniquePtr<mozilla::dom::ClientSource> mInitialClientSource; + nsCOMPtr<nsINetworkInterceptController> mInterceptController; + RefPtr<nsDOMNavigationTiming> mTiming; + RefPtr<nsDSURIContentListener> mContentListener; + RefPtr<nsGlobalWindowOuter> mScriptGlobal; + nsCOMPtr<nsIPrincipal> mParentCharsetPrincipal; + nsCOMPtr<nsIMutableArray> mRefreshURIList; + nsCOMPtr<nsIMutableArray> mSavedRefreshURIList; + uint64_t mContentWindowID; + nsCOMPtr<nsIContentViewer> mContentViewer; + nsCOMPtr<nsIWidget> mParentWidget; + RefPtr<mozilla::dom::ChildSHistory> mSessionHistory; + nsCOMPtr<nsIWebBrowserFind> mFind; + RefPtr<nsCommandManager> mCommandManager; + RefPtr<mozilla::dom::BrowsingContext> mBrowsingContext; + + // Weak reference to our BrowserChild actor. + nsWeakPtr mBrowserChild; + + // Dimensions of the docshell + nsIntRect mBounds; + + /** + * Content-Type Hint of the most-recently initiated load. Used for + * session history entries. + */ + nsCString mContentTypeHint; + + // An observed docshell wrapper is created when recording markers is enabled. + mozilla::UniquePtr<mozilla::ObservedDocShell> mObserved; + + // mCurrentURI should be marked immutable on set if possible. + nsCOMPtr<nsIURI> mCurrentURI; + nsCOMPtr<nsIReferrerInfo> mReferrerInfo; + +#ifdef DEBUG + // We're counting the number of |nsDocShells| to help find leaks + static unsigned long gNumberOfDocShells; + + nsCOMPtr<nsIURI> mLastOpenedURI; +#endif + + // Reference to the SHEntry for this docshell until the page is destroyed. + // Somebody give me better name + nsCOMPtr<nsISHEntry> mOSHE; + + // Reference to the SHEntry for this docshell until the page is loaded + // Somebody give me better name. + // If mLSHE is non-null, non-pushState subframe loads don't create separate + // root history entries. That is, frames loaded during the parent page + // load don't generate history entries the way frame navigation after the + // parent has loaded does. (This isn't the only purpose of mLSHE.) + nsCOMPtr<nsISHEntry> mLSHE; + + // These are only set when fission.sessionHistoryInParent is set. + mozilla::UniquePtr<mozilla::dom::SessionHistoryInfo> mActiveEntry; + bool mActiveEntryIsLoadingFromSessionHistory = false; + // mLoadingEntry is set when we're about to start loading. + mozilla::UniquePtr<mozilla::dom::LoadingSessionHistoryInfo> mLoadingEntry; + + // Holds a weak pointer to a RestorePresentationEvent object if any that + // holds a weak pointer back to us. We use this pointer to possibly revoke + // the event whenever necessary. + nsRevocableEventPtr<RestorePresentationEvent> mRestorePresentationEvent; + + // Editor data, if this document is designMode or contentEditable. + mozilla::UniquePtr<nsDocShellEditorData> mEditorData; + + // The URI we're currently loading. This is only relevant during the + // firing of a pagehide/unload. The caller of FirePageHideNotification() + // is responsible for setting it and unsetting it. It may be null if the + // pagehide/unload is happening for some reason other than just loading a + // new URI. + nsCOMPtr<nsIURI> mLoadingURI; + + // Set in LoadErrorPage from the method argument and used later + // in CreateContentViewer. We have to delay an shistory entry creation + // for which these objects are needed. + nsCOMPtr<nsIURI> mFailedURI; + nsCOMPtr<nsIChannel> mFailedChannel; + + // Set in DoURILoad when either the LOAD_RELOAD_ALLOW_MIXED_CONTENT flag or + // the LOAD_NORMAL_ALLOW_MIXED_CONTENT flag is set. + // Checked in nsMixedContentBlocker, to see if the channels match. + nsCOMPtr<nsIChannel> mMixedContentChannel; + + mozilla::UniquePtr<mozilla::gfx::Matrix5x4> mColorMatrix; + + const mozilla::Encoding* mForcedCharset; + const mozilla::Encoding* mParentCharset; + + // WEAK REFERENCES BELOW HERE. + // Note these are intentionally not addrefd. Doing so will create a cycle. + // For that reasons don't use nsCOMPtr. + + nsIDocShellTreeOwner* mTreeOwner; // Weak Reference + + RefPtr<mozilla::dom::EventTarget> mChromeEventHandler; + + mozilla::ScrollbarPreference mScrollbarPref; // persistent across doc loads + + eCharsetReloadState mCharsetReloadState; + + int32_t mParentCharsetSource; + mozilla::CSSIntSize mFrameMargins; + + // This can either be a content docshell or a chrome docshell. + const int32_t mItemType; + + // Index into the nsISHEntry array, indicating the previous and current + // entry at the time that this DocShell begins to load. Consequently + // root docshell's indices can differ from child docshells'. + int32_t mPreviousEntryIndex; + int32_t mLoadedEntryIndex; + + // Offset in the parent's child list. + // -1 if the docshell is added dynamically to the parent shell. + int32_t mChildOffset; + + BusyFlags mBusyFlags; + AppType mAppType; + uint32_t mLoadType; + uint32_t mFailedLoadType; + + // A depth count of how many times NotifyRunToCompletionStart + // has been called without a matching NotifyRunToCompletionStop. + uint32_t mJSRunToCompletionDepth; + + // Whether or not handling of the <meta name="viewport"> tag is overridden. + // Possible values are defined as constants in nsIDocShell.idl. + MetaViewportOverride mMetaViewportOverride; + + // The following two fields cannot be declared as bit fields + // because of uses with AutoRestore. + bool mCreatingDocument; // (should be) debugging only +#ifdef DEBUG + bool mInEnsureScriptEnv; + uint64_t mDocShellID = 0; +#endif + + bool mInitialized : 1; + bool mAllowSubframes : 1; + bool mAllowJavascript : 1; + bool mAllowMetaRedirects : 1; + bool mAllowImages : 1; + bool mAllowMedia : 1; + bool mAllowDNSPrefetch : 1; + bool mAllowWindowControl : 1; + bool mCSSErrorReportingEnabled : 1; + bool mAllowAuth : 1; + bool mAllowKeywordFixup : 1; + bool mIsOffScreenBrowser : 1; + bool mDisableMetaRefreshWhenInactive : 1; + bool mIsAppTab : 1; + bool mDeviceSizeIsPageSize : 1; + bool mWindowDraggingAllowed : 1; + bool mInFrameSwap : 1; + + // Because scriptability depends on the mAllowJavascript values of our + // ancestors, we cache the effective scriptability and recompute it when + // it might have changed; + bool mCanExecuteScripts : 1; + + // This boolean is set to true right before we fire pagehide and generally + // unset when we embed a new content viewer. While it's true no navigation + // is allowed in this docshell. + bool mFiredUnloadEvent : 1; + + // this flag is for bug #21358. a docshell may load many urls + // which don't result in new documents being created (i.e. a new + // content viewer) we want to make sure we don't call a on load + // event more than once for a given content viewer. + bool mEODForCurrentDocument : 1; + bool mURIResultedInDocument : 1; + + bool mIsBeingDestroyed : 1; + + bool mIsExecutingOnLoadHandler : 1; + + // Indicates to CreateContentViewer() that it is safe to cache the old + // presentation of the page, and to SetupNewViewer() that the old viewer + // should be passed a SHEntry to save itself into. + bool mSavingOldViewer : 1; + + bool mAffectPrivateSessionLifetime : 1; + bool mInvisible : 1; + bool mHasLoadedNonBlankURI : 1; + + // This flag means that mTiming has been initialized but nulled out. + // We will check the innerWin's timing before creating a new one + // in MaybeInitTiming() + bool mBlankTiming : 1; + + // This flag indicates when the title is valid for the current URI. + bool mTitleValidForCurrentURI : 1; + + // If mWillChangeProcess is set to true, then when the docshell is destroyed, + // we prepare the browsing context to change process. + bool mWillChangeProcess : 1; + + // This flag indicates whether or not the DocShell is currently executing an + // nsIWebNavigation navigation method. + bool mIsNavigating : 1; + + // This flag indicates whether the media in this docshell should be suspended + // when the docshell is inactive. + bool mSuspendMediaWhenInactive : 1; + + // Whether we have a pending encoding autodetection request from the + // menu for all encodings. + bool mForcedAutodetection : 1; +}; + +#endif /* nsDocShell_h__ */ |