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gecko-dev/docshell/base/nsDocShell.h

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/* -*- 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);
// If the LoadState's URI is a javascript: URI, checks that the triggering
// principal subsumes the principal of the current document, and returns
// NS_ERROR_DOM_BAD_CROSS_ORIGIN_URI if it does not.
nsresult CheckDisallowedJavascriptLoad(nsDocShellLoadState* aLoadState);
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();
/**
* Returns true if `noopener` will be force-enabled by any attempt to create
* a popup window, even if rel="opener" is requested.
*/
bool NoopenerForceEnabled();
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__ */
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