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gecko-dev/docshell/base/CanonicalBrowsingContext.cpp

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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/. */
#include "mozilla/dom/CanonicalBrowsingContext.h"
#include "ContentAnalysis.h"
#include "ErrorList.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/Components.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/EventForwards.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/BrowsingContextBinding.h"
#include "mozilla/dom/BrowsingContextGroup.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/EventTarget.h"
#include "mozilla/dom/Navigation.h"
#include "mozilla/dom/PBrowserParent.h"
#include "mozilla/dom/PBackgroundSessionStorageCache.h"
#include "mozilla/dom/PWindowGlobalParent.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/Promise-inl.h"
#include "mozilla/dom/WindowGlobalParent.h"
#include "mozilla/dom/ContentProcessManager.h"
#include "mozilla/dom/MediaController.h"
#include "mozilla/dom/MediaControlService.h"
#include "mozilla/dom/ContentPlaybackController.h"
#include "mozilla/dom/SessionStorageManager.h"
#include "mozilla/ipc/ProtocolUtils.h"
#include "mozilla/layers/CompositorBridgeChild.h"
#ifdef NS_PRINTING
# include "mozilla/layout/RemotePrintJobParent.h"
#endif
#include "mozilla/net/DocumentLoadListener.h"
#include "mozilla/NullPrincipal.h"
#include "mozilla/StaticPrefs_browser.h"
#include "mozilla/StaticPrefs_docshell.h"
#include "mozilla/StaticPrefs_fission.h"
#include "mozilla/glean/DomMetrics.h"
#include "nsILayoutHistoryState.h"
#include "nsIPrintSettings.h"
#include "nsIPrintSettingsService.h"
#include "nsISupports.h"
#include "nsIWebNavigation.h"
#include "nsDocShell.h"
#include "nsFrameLoader.h"
#include "nsFrameLoaderOwner.h"
#include "nsGlobalWindowOuter.h"
#include "nsIContentAnalysis.h"
#include "nsIWebBrowserChrome.h"
#include "nsIXULRuntime.h"
#include "nsNetUtil.h"
#include "nsSHistory.h"
#include "nsSecureBrowserUI.h"
#include "nsQueryObject.h"
#include "nsBrowserStatusFilter.h"
#include "nsIBrowser.h"
#include "nsTHashSet.h"
#include "nsISessionStoreFunctions.h"
#include "nsIXPConnect.h"
#include "nsImportModule.h"
#include "UnitTransforms.h"
using namespace mozilla::ipc;
extern mozilla::LazyLogModule gAutoplayPermissionLog;
extern mozilla::LazyLogModule gSHLog;
extern mozilla::LazyLogModule gSHIPBFCacheLog;
#define AUTOPLAY_LOG(msg, ...) \
MOZ_LOG(gAutoplayPermissionLog, LogLevel::Debug, (msg, ##__VA_ARGS__))
static mozilla::LazyLogModule sPBContext("PBContext");
// Global count of canonical browsing contexts with the private attribute set
static uint32_t gNumberOfPrivateContexts = 0;
// Current parent process epoch for parent initiated navigations
static uint64_t gParentInitiatedNavigationEpoch = 0;
static void IncreasePrivateCount() {
gNumberOfPrivateContexts++;
MOZ_LOG(sPBContext, mozilla::LogLevel::Debug,
("%s: Private browsing context count %d -> %d", __func__,
gNumberOfPrivateContexts - 1, gNumberOfPrivateContexts));
if (gNumberOfPrivateContexts > 1) {
return;
}
static bool sHasSeenPrivateContext = false;
if (!sHasSeenPrivateContext) {
sHasSeenPrivateContext = true;
mozilla::glean::dom_parentprocess::private_window_used.Set(true);
}
}
static void DecreasePrivateCount() {
MOZ_ASSERT(gNumberOfPrivateContexts > 0);
gNumberOfPrivateContexts--;
MOZ_LOG(sPBContext, mozilla::LogLevel::Debug,
("%s: Private browsing context count %d -> %d", __func__,
gNumberOfPrivateContexts + 1, gNumberOfPrivateContexts));
if (!gNumberOfPrivateContexts &&
!mozilla::StaticPrefs::browser_privatebrowsing_autostart()) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
MOZ_LOG(sPBContext, mozilla::LogLevel::Debug,
("%s: last-pb-context-exited fired", __func__));
observerService->NotifyObservers(nullptr, "last-pb-context-exited",
nullptr);
}
}
}
namespace mozilla::dom {
extern mozilla::LazyLogModule gUserInteractionPRLog;
#define USER_ACTIVATION_LOG(msg, ...) \
MOZ_LOG(gUserInteractionPRLog, LogLevel::Debug, (msg, ##__VA_ARGS__))
CanonicalBrowsingContext::CanonicalBrowsingContext(WindowContext* aParentWindow,
BrowsingContextGroup* aGroup,
uint64_t aBrowsingContextId,
uint64_t aOwnerProcessId,
uint64_t aEmbedderProcessId,
BrowsingContext::Type aType,
FieldValues&& aInit)
: BrowsingContext(aParentWindow, aGroup, aBrowsingContextId, aType,
std::move(aInit)),
mProcessId(aOwnerProcessId),
mEmbedderProcessId(aEmbedderProcessId),
mPermanentKey(JS::NullValue()) {
// You are only ever allowed to create CanonicalBrowsingContexts in the
// parent process.
MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
// The initial URI in a BrowsingContext is always "about:blank".
MOZ_ALWAYS_SUCCEEDS(
NS_NewURI(getter_AddRefs(mCurrentRemoteURI), "about:blank"));
mozilla::HoldJSObjects(this);
}
CanonicalBrowsingContext::~CanonicalBrowsingContext() {
mPermanentKey.setNull();
mozilla::DropJSObjects(this);
if (mSessionHistory) {
mSessionHistory->SetBrowsingContext(nullptr);
}
}
/* static */
already_AddRefed<CanonicalBrowsingContext> CanonicalBrowsingContext::Get(
uint64_t aId) {
MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
return BrowsingContext::Get(aId).downcast<CanonicalBrowsingContext>();
}
/* static */
CanonicalBrowsingContext* CanonicalBrowsingContext::Cast(
BrowsingContext* aContext) {
MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
return static_cast<CanonicalBrowsingContext*>(aContext);
}
/* static */
const CanonicalBrowsingContext* CanonicalBrowsingContext::Cast(
const BrowsingContext* aContext) {
MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
return static_cast<const CanonicalBrowsingContext*>(aContext);
}
already_AddRefed<CanonicalBrowsingContext> CanonicalBrowsingContext::Cast(
already_AddRefed<BrowsingContext>&& aContext) {
MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
return aContext.downcast<CanonicalBrowsingContext>();
}
ContentParent* CanonicalBrowsingContext::GetContentParent() const {
if (mProcessId == 0) {
return nullptr;
}
ContentProcessManager* cpm = ContentProcessManager::GetSingleton();
if (!cpm) {
return nullptr;
}
return cpm->GetContentProcessById(ContentParentId(mProcessId));
}
void CanonicalBrowsingContext::GetCurrentRemoteType(nsACString& aRemoteType,
ErrorResult& aRv) const {
// If we're in the parent process, dump out the void string.
if (mProcessId == 0) {
aRemoteType = NOT_REMOTE_TYPE;
return;
}
ContentParent* cp = GetContentParent();
if (!cp) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return;
}
aRemoteType = cp->GetRemoteType();
}
void CanonicalBrowsingContext::SetOwnerProcessId(uint64_t aProcessId) {
MOZ_LOG(GetLog(), LogLevel::Debug,
("SetOwnerProcessId for 0x%08" PRIx64 " (0x%08" PRIx64
" -> 0x%08" PRIx64 ")",
Id(), mProcessId, aProcessId));
mProcessId = aProcessId;
}
nsISecureBrowserUI* CanonicalBrowsingContext::GetSecureBrowserUI() {
if (!IsTop()) {
return nullptr;
}
if (!mSecureBrowserUI) {
mSecureBrowserUI = new nsSecureBrowserUI(this);
}
return mSecureBrowserUI;
}
void CanonicalBrowsingContext::ReplacedBy(
CanonicalBrowsingContext* aNewContext,
const NavigationIsolationOptions& aRemotenessOptions) {
MOZ_ASSERT(!aNewContext->mWebProgress);
MOZ_ASSERT(!aNewContext->mSessionHistory);
MOZ_ASSERT(IsTop() && aNewContext->IsTop());
mIsReplaced = true;
aNewContext->mIsReplaced = false;
if (mStatusFilter) {
mStatusFilter->RemoveProgressListener(mDocShellProgressBridge);
mStatusFilter = nullptr;
}
mWebProgress->ContextReplaced(aNewContext);
aNewContext->mWebProgress = std::move(mWebProgress);
// Use the Transaction for the fields which need to be updated whether or not
// the new context has been attached before.
// SetWithoutSyncing can be used if context hasn't been attached.
Transaction txn;
txn.SetBrowserId(GetBrowserId());
txn.SetIsAppTab(GetIsAppTab());
txn.SetHasSiblings(GetHasSiblings());
txn.SetTopLevelCreatedByWebContent(GetTopLevelCreatedByWebContent());
txn.SetHistoryID(GetHistoryID());
txn.SetExplicitActive(GetExplicitActive());
txn.SetEmbedderColorSchemes(GetEmbedderColorSchemes());
txn.SetHasRestoreData(GetHasRestoreData());
txn.SetShouldDelayMediaFromStart(GetShouldDelayMediaFromStart());
txn.SetForceOffline(GetForceOffline());
txn.SetTopInnerSizeForRFP(GetTopInnerSizeForRFP());
txn.SetIPAddressSpace(GetIPAddressSpace());
// Propagate some settings on BrowsingContext replacement so they're not lost
// on bfcached navigations. These are important for GeckoView (see bug
// 1781936).
txn.SetAllowJavascript(GetAllowJavascript());
txn.SetForceEnableTrackingProtection(GetForceEnableTrackingProtection());
txn.SetUserAgentOverride(GetUserAgentOverride());
txn.SetSuspendMediaWhenInactive(GetSuspendMediaWhenInactive());
txn.SetDisplayMode(GetDisplayMode());
txn.SetForceDesktopViewport(GetForceDesktopViewport());
txn.SetIsUnderHiddenEmbedderElement(GetIsUnderHiddenEmbedderElement());
// When using site-specific zoom, we let the frontend manage the zoom level
// of BFCache'd contexts. Overriding those zoom levels can cause weirdness
// like bug 1846141. We always copy to new contexts to avoid bug 1914149.
if (!aNewContext->EverAttached() ||
!StaticPrefs::browser_zoom_siteSpecific()) {
txn.SetFullZoom(GetFullZoom());
txn.SetTextZoom(GetTextZoom());
}
// Propagate the default load flags so that the TRR mode flags are forwarded
// to the new browsing context. See bug 1828643.
txn.SetDefaultLoadFlags(GetDefaultLoadFlags());
// As this is a different BrowsingContext, set InitialSandboxFlags to the
// current flags in the new context so that they also apply to any initial
// about:blank documents created in it.
txn.SetSandboxFlags(GetSandboxFlags());
txn.SetInitialSandboxFlags(GetSandboxFlags());
txn.SetTargetTopLevelLinkClicksToBlankInternal(
TargetTopLevelLinkClicksToBlank());
if (aNewContext->EverAttached()) {
MOZ_ALWAYS_SUCCEEDS(txn.Commit(aNewContext));
} else {
txn.CommitWithoutSyncing(aNewContext);
}
aNewContext->mRestoreState = mRestoreState.forget();
MOZ_ALWAYS_SUCCEEDS(SetHasRestoreData(false));
// XXXBFCache name handling is still a bit broken in Fission in general,
// at least in case name should be cleared.
if (aRemotenessOptions.mTryUseBFCache) {
MOZ_ASSERT(!aNewContext->EverAttached());
aNewContext->mFields.SetWithoutSyncing<IDX_Name>(GetName());
// We don't copy over HasLoadedNonInitialDocument here, we'll actually end
// up loading a new initial document at this point, before the real load.
// The real load will then end up setting HasLoadedNonInitialDocument to
// true.
}
if (mSessionHistory) {
mSessionHistory->SetBrowsingContext(aNewContext);
// At this point we will be creating a new ChildSHistory in the child.
// That means that the child's epoch will be reset, so it makes sense to
// reset the epoch in the parent too.
mSessionHistory->SetEpoch(0, Nothing());
mSessionHistory.swap(aNewContext->mSessionHistory);
RefPtr<ChildSHistory> childSHistory = ForgetChildSHistory();
aNewContext->SetChildSHistory(childSHistory);
}
BackgroundSessionStorageManager::PropagateManager(Id(), aNewContext->Id());
// Transfer the ownership of the priority active status from the old context
// to the new context.
aNewContext->mPriorityActive = mPriorityActive;
mPriorityActive = false;
MOZ_ASSERT(aNewContext->mLoadingEntries.IsEmpty());
mLoadingEntries.SwapElements(aNewContext->mLoadingEntries);
MOZ_ASSERT(!aNewContext->mActiveEntry);
mActiveEntry.swap(aNewContext->mActiveEntry);
if (Navigation::IsAPIEnabled()) {
MOZ_ASSERT(aNewContext->mActiveEntryList.isEmpty());
aNewContext->mActiveEntryList.extendBack(std::move(mActiveEntryList));
}
aNewContext->mPermanentKey = mPermanentKey;
mPermanentKey.setNull();
}
void CanonicalBrowsingContext::UpdateSecurityState() {
if (mSecureBrowserUI) {
mSecureBrowserUI->RecomputeSecurityFlags();
}
}
void CanonicalBrowsingContext::GetWindowGlobals(
nsTArray<RefPtr<WindowGlobalParent>>& aWindows) {
aWindows.SetCapacity(GetWindowContexts().Length());
for (auto& window : GetWindowContexts()) {
aWindows.AppendElement(static_cast<WindowGlobalParent*>(window.get()));
}
}
WindowGlobalParent* CanonicalBrowsingContext::GetCurrentWindowGlobal() const {
return static_cast<WindowGlobalParent*>(GetCurrentWindowContext());
}
WindowGlobalParent* CanonicalBrowsingContext::GetParentWindowContext() {
return static_cast<WindowGlobalParent*>(
BrowsingContext::GetParentWindowContext());
}
WindowGlobalParent* CanonicalBrowsingContext::GetTopWindowContext() {
return static_cast<WindowGlobalParent*>(
BrowsingContext::GetTopWindowContext());
}
already_AddRefed<nsIWidget>
CanonicalBrowsingContext::GetParentProcessWidgetContaining() {
// If our document is loaded in-process, such as chrome documents, get the
// widget directly from our outer window. Otherwise, try to get the widget
// from the toplevel content's browser's element.
nsCOMPtr<nsIWidget> widget;
if (nsGlobalWindowOuter* window = nsGlobalWindowOuter::Cast(GetDOMWindow())) {
widget = window->GetNearestWidget();
} else if (Element* topEmbedder = Top()->GetEmbedderElement()) {
widget = nsContentUtils::WidgetForContent(topEmbedder);
if (!widget) {
widget = nsContentUtils::WidgetForDocument(topEmbedder->OwnerDoc());
}
}
if (widget) {
widget = widget->GetTopLevelWidget();
}
return widget.forget();
}
already_AddRefed<nsIBrowserDOMWindow>
CanonicalBrowsingContext::GetBrowserDOMWindow() {
RefPtr<CanonicalBrowsingContext> chromeTop = TopCrossChromeBoundary();
nsGlobalWindowOuter* topWin;
if ((topWin = nsGlobalWindowOuter::Cast(chromeTop->GetDOMWindow())) &&
topWin->IsChromeWindow()) {
return do_AddRef(topWin->GetBrowserDOMWindow());
}
return nullptr;
}
already_AddRefed<WindowGlobalParent>
CanonicalBrowsingContext::GetEmbedderWindowGlobal() const {
uint64_t windowId = GetEmbedderInnerWindowId();
if (windowId == 0) {
return nullptr;
}
return WindowGlobalParent::GetByInnerWindowId(windowId);
}
CanonicalBrowsingContext*
CanonicalBrowsingContext::GetParentCrossChromeBoundary() {
if (GetParent()) {
return Cast(GetParent());
}
if (auto* embedder = GetEmbedderElement()) {
return Cast(embedder->OwnerDoc()->GetBrowsingContext());
}
return nullptr;
}
CanonicalBrowsingContext* CanonicalBrowsingContext::TopCrossChromeBoundary() {
CanonicalBrowsingContext* bc = this;
while (auto* parent = bc->GetParentCrossChromeBoundary()) {
bc = parent;
}
return bc;
}
Nullable<WindowProxyHolder> CanonicalBrowsingContext::GetTopChromeWindow() {
RefPtr<CanonicalBrowsingContext> bc = TopCrossChromeBoundary();
if (bc->IsChrome()) {
return WindowProxyHolder(bc.forget());
}
return nullptr;
}
nsISHistory* CanonicalBrowsingContext::GetSessionHistory() {
if (!IsTop()) {
return Cast(Top())->GetSessionHistory();
}
// Check GetChildSessionHistory() to make sure that this BrowsingContext has
// session history enabled.
if (!mSessionHistory && GetChildSessionHistory()) {
mSessionHistory = new nsSHistory(this);
}
return mSessionHistory;
}
SessionHistoryEntry* CanonicalBrowsingContext::GetActiveSessionHistoryEntry() {
return mActiveEntry;
}
void CanonicalBrowsingContext::SetActiveSessionHistoryEntry(
SessionHistoryEntry* aEntry) {
mActiveEntry = aEntry;
if (Navigation::IsAPIEnabled()) {
mActiveEntryList.clear();
if (mActiveEntry) {
mActiveEntryList.insertBack(mActiveEntry);
}
}
}
bool CanonicalBrowsingContext::HasHistoryEntry(nsISHEntry* aEntry) {
// XXX Should we check also loading entries?
return aEntry && mActiveEntry == aEntry;
}
void CanonicalBrowsingContext::SwapHistoryEntries(nsISHEntry* aOldEntry,
nsISHEntry* aNewEntry) {
// XXX Should we check also loading entries?
if (mActiveEntry == aOldEntry) {
nsCOMPtr<SessionHistoryEntry> newEntry = do_QueryInterface(aNewEntry);
MOZ_LOG(gSHLog, LogLevel::Verbose,
("Swapping History Entries: mActiveEntry=%p, aNewEntry=%p\n"
"Is in list: mActiveEntry %d, aNewEntry %d",
mActiveEntry.get(), aNewEntry,
mActiveEntry ? mActiveEntry->isInList() : false,
newEntry ? newEntry->isInList() : false));
if (!newEntry) {
mActiveEntryList.clear();
mActiveEntry = nullptr;
return;
}
if (Navigation::IsAPIEnabled() && mActiveEntry->isInList()) {
RefPtr beforeOldEntry = mActiveEntry->removeAndGetPrevious();
if (beforeOldEntry) {
beforeOldEntry->setNext(newEntry);
} else {
mActiveEntryList.insertFront(newEntry);
}
}
mActiveEntry = newEntry.forget();
}
}
void CanonicalBrowsingContext::AddLoadingSessionHistoryEntry(
uint64_t aLoadId, SessionHistoryEntry* aEntry) {
Unused << SetHistoryID(aEntry->DocshellID());
mLoadingEntries.AppendElement(LoadingSessionHistoryEntry{aLoadId, aEntry});
}
void CanonicalBrowsingContext::GetLoadingSessionHistoryInfoFromParent(
Maybe<LoadingSessionHistoryInfo>& aLoadingInfo) {
nsISHistory* shistory = GetSessionHistory();
if (!shistory || !GetParent()) {
return;
}
SessionHistoryEntry* parentSHE =
GetParent()->Canonical()->GetActiveSessionHistoryEntry();
if (parentSHE) {
int32_t index = -1;
for (BrowsingContext* sibling : GetParent()->Children()) {
++index;
if (sibling == this) {
nsCOMPtr<nsISHEntry> shEntry;
parentSHE->GetChildSHEntryIfHasNoDynamicallyAddedChild(
index, getter_AddRefs(shEntry));
nsCOMPtr<SessionHistoryEntry> she = do_QueryInterface(shEntry);
if (she) {
aLoadingInfo.emplace(she);
mLoadingEntries.AppendElement(LoadingSessionHistoryEntry{
aLoadingInfo.value().mLoadId, she.get()});
Unused << SetHistoryID(she->DocshellID());
}
break;
}
}
}
}
UniquePtr<LoadingSessionHistoryInfo>
CanonicalBrowsingContext::CreateLoadingSessionHistoryEntryForLoad(
nsDocShellLoadState* aLoadState, SessionHistoryEntry* existingEntry,
nsIChannel* aChannel) {
RefPtr<SessionHistoryEntry> entry;
const LoadingSessionHistoryInfo* existingLoadingInfo =
aLoadState->GetLoadingSessionHistoryInfo();
MOZ_ASSERT_IF(!existingLoadingInfo, !existingEntry);
if (existingLoadingInfo) {
if (existingEntry) {
entry = existingEntry;
} else {
MOZ_ASSERT(!existingLoadingInfo->mLoadIsFromSessionHistory);
SessionHistoryEntry::LoadingEntry* loadingEntry =
SessionHistoryEntry::GetByLoadId(existingLoadingInfo->mLoadId);
MOZ_LOG(gSHLog, LogLevel::Verbose,
("SHEntry::GetByLoadId(%" PRIu64 ") -> %p",
existingLoadingInfo->mLoadId, entry.get()));
if (!loadingEntry) {
return nullptr;
}
entry = loadingEntry->mEntry;
}
// If the entry was updated, update also the LoadingSessionHistoryInfo.
UniquePtr<LoadingSessionHistoryInfo> lshi =
MakeUnique<LoadingSessionHistoryInfo>(entry, existingLoadingInfo);
aLoadState->SetLoadingSessionHistoryInfo(std::move(lshi));
existingLoadingInfo = aLoadState->GetLoadingSessionHistoryInfo();
Unused << SetHistoryEntryCount(entry->BCHistoryLength());
} else if (aLoadState->LoadType() == LOAD_REFRESH &&
!ShouldAddEntryForRefresh(aLoadState->URI(),
aLoadState->PostDataStream()) &&
mActiveEntry) {
entry = mActiveEntry;
} else {
entry = new SessionHistoryEntry(aLoadState, aChannel);
if (IsTop() &&
!nsDocShell::ShouldAddToSessionHistory(aLoadState->URI(), aChannel)) {
entry->SetTransient();
}
if (!IsTop() && (mActiveEntry || !mLoadingEntries.IsEmpty())) {
entry->SetIsSubFrame(true);
}
entry->SetDocshellID(GetHistoryID());
entry->SetIsDynamicallyAdded(CreatedDynamically());
entry->SetForInitialLoad(true);
}
MOZ_DIAGNOSTIC_ASSERT(entry);
UniquePtr<LoadingSessionHistoryInfo> loadingInfo;
if (existingLoadingInfo) {
loadingInfo = MakeUnique<LoadingSessionHistoryInfo>(*existingLoadingInfo);
} else {
loadingInfo = MakeUnique<LoadingSessionHistoryInfo>(entry);
mLoadingEntries.AppendElement(
LoadingSessionHistoryEntry{loadingInfo->mLoadId, entry});
}
MOZ_ASSERT(SessionHistoryEntry::GetByLoadId(loadingInfo->mLoadId)->mEntry ==
entry);
return loadingInfo;
}
UniquePtr<LoadingSessionHistoryInfo>
CanonicalBrowsingContext::ReplaceLoadingSessionHistoryEntryForLoad(
LoadingSessionHistoryInfo* aInfo, nsIChannel* aNewChannel) {
MOZ_ASSERT(aInfo);
MOZ_ASSERT(aNewChannel);
SessionHistoryInfo newInfo = SessionHistoryInfo(
aNewChannel, aInfo->mInfo.LoadType(),
aInfo->mInfo.GetPartitionedPrincipalToInherit(), aInfo->mInfo.GetCsp());
for (size_t i = 0; i < mLoadingEntries.Length(); ++i) {
if (mLoadingEntries[i].mLoadId == aInfo->mLoadId) {
RefPtr<SessionHistoryEntry> loadingEntry = mLoadingEntries[i].mEntry;
loadingEntry->SetInfo(&newInfo);
if (IsTop()) {
// Only top level pages care about Get/SetPersist.
nsCOMPtr<nsIURI> uri;
aNewChannel->GetURI(getter_AddRefs(uri));
if (!nsDocShell::ShouldAddToSessionHistory(uri, aNewChannel)) {
loadingEntry->SetTransient();
}
} else {
loadingEntry->SetIsSubFrame(aInfo->mInfo.IsSubFrame());
}
loadingEntry->SetDocshellID(GetHistoryID());
loadingEntry->SetIsDynamicallyAdded(CreatedDynamically());
return MakeUnique<LoadingSessionHistoryInfo>(loadingEntry, aInfo);
}
}
return nullptr;
}
mozilla::Span<const SessionHistoryInfo>
CanonicalBrowsingContext::GetContiguousSessionHistoryInfos() {
MOZ_ASSERT(Navigation::IsAPIEnabled());
mActiveContiguousEntries.ClearAndRetainStorage();
MOZ_LOG(gSHLog, LogLevel::Verbose,
("GetContiguousSessionHistoryInfos called with mActiveEntry=%p, "
"active entry list does%s contain the active entry.",
mActiveEntry.get(),
mActiveEntryList.contains(mActiveEntry) ? "" : "n't"));
if (mActiveEntry && mActiveEntry->isInList()) {
nsSHistory::WalkContiguousEntriesInOrder(mActiveEntry, [&](auto* aEntry) {
if (nsCOMPtr<SessionHistoryEntry> entry = do_QueryObject(aEntry)) {
mActiveContiguousEntries.AppendElement(entry->Info());
}
});
}
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"mActiveContiguousEntries has {} entries",
mActiveContiguousEntries.Length());
return mActiveContiguousEntries;
}
using PrintPromise = CanonicalBrowsingContext::PrintPromise;
#ifdef NS_PRINTING
// Clients must call StaticCloneForPrintingCreated or
// NoStaticCloneForPrintingWillBeCreated before the underlying promise can
// resolve.
class PrintListenerAdapter final : public nsIWebProgressListener {
public:
explicit PrintListenerAdapter(PrintPromise::Private* aPromise)
: mPromise(aPromise) {}
NS_DECL_ISUPPORTS
// NS_DECL_NSIWEBPROGRESSLISTENER
NS_IMETHOD OnStateChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
uint32_t aStateFlags, nsresult aStatus) override {
MOZ_ASSERT(NS_IsMainThread());
if (aStateFlags & nsIWebProgressListener::STATE_STOP &&
aStateFlags & nsIWebProgressListener::STATE_IS_DOCUMENT && mPromise) {
mPrintJobFinished = true;
if (mHaveSetBrowsingContext) {
mPromise->Resolve(mClonedStaticBrowsingContext, __func__);
mPromise = nullptr;
}
}
return NS_OK;
}
NS_IMETHOD OnStatusChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
nsresult aStatus,
const char16_t* aMessage) override {
if (aStatus != NS_OK && mPromise) {
mPromise->Reject(aStatus, __func__);
mPromise = nullptr;
}
return NS_OK;
}
NS_IMETHOD OnProgressChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest, int32_t aCurSelfProgress,
int32_t aMaxSelfProgress,
int32_t aCurTotalProgress,
int32_t aMaxTotalProgress) override {
return NS_OK;
}
NS_IMETHOD OnLocationChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest, nsIURI* aLocation,
uint32_t aFlags) override {
return NS_OK;
}
NS_IMETHOD OnSecurityChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest, uint32_t aState) override {
return NS_OK;
}
NS_IMETHOD OnContentBlockingEvent(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
uint32_t aEvent) override {
return NS_OK;
}
void StaticCloneForPrintingCreated(
MaybeDiscardedBrowsingContext&& aClonedStaticBrowsingContext) {
MOZ_ASSERT(NS_IsMainThread());
mClonedStaticBrowsingContext = std::move(aClonedStaticBrowsingContext);
mHaveSetBrowsingContext = true;
if (mPrintJobFinished && mPromise) {
mPromise->Resolve(mClonedStaticBrowsingContext, __func__);
mPromise = nullptr;
}
}
void NoStaticCloneForPrintingWillBeCreated() {
StaticCloneForPrintingCreated(nullptr);
}
private:
~PrintListenerAdapter() = default;
RefPtr<PrintPromise::Private> mPromise;
MaybeDiscardedBrowsingContext mClonedStaticBrowsingContext = nullptr;
bool mHaveSetBrowsingContext = false;
bool mPrintJobFinished = false;
};
NS_IMPL_ISUPPORTS(PrintListenerAdapter, nsIWebProgressListener)
#endif
already_AddRefed<Promise> CanonicalBrowsingContext::PrintJS(
nsIPrintSettings* aPrintSettings, ErrorResult& aRv) {
RefPtr<Promise> promise = Promise::Create(GetIncumbentGlobal(), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return promise.forget();
}
Print(aPrintSettings)
->Then(
GetCurrentSerialEventTarget(), __func__,
[promise](MaybeDiscardedBrowsingContext) {
promise->MaybeResolveWithUndefined();
},
[promise](nsresult aResult) { promise->MaybeReject(aResult); });
return promise.forget();
}
RefPtr<PrintPromise> CanonicalBrowsingContext::Print(
nsIPrintSettings* aPrintSettings) {
#ifndef NS_PRINTING
return PrintPromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE, __func__);
#else
// Content analysis is not supported on non-Windows platforms.
# if defined(XP_WIN)
bool needContentAnalysis = false;
nsCOMPtr<nsIContentAnalysis> contentAnalysis =
mozilla::components::nsIContentAnalysis::Service();
Unused << NS_WARN_IF(!contentAnalysis);
if (contentAnalysis) {
nsresult rv = contentAnalysis->GetIsActive(&needContentAnalysis);
Unused << NS_WARN_IF(NS_FAILED(rv));
}
if (needContentAnalysis) {
auto done = MakeRefPtr<PrintPromise::Private>(__func__);
contentanalysis::ContentAnalysis::PrintToPDFToDetermineIfPrintAllowed(
this, aPrintSettings)
->Then(
GetCurrentSerialEventTarget(), __func__,
[done, aPrintSettings = RefPtr{aPrintSettings},
self = RefPtr{this}](
contentanalysis::ContentAnalysis::PrintAllowedResult aResponse)
MOZ_CAN_RUN_SCRIPT_BOUNDARY_LAMBDA mutable {
if (aResponse.mAllowed) {
self->PrintWithNoContentAnalysis(
aPrintSettings, false,
aResponse.mCachedStaticDocumentBrowsingContext)
->ChainTo(done.forget(), __func__);
} else {
// Since we are not doing the second print in this case,
// release the clone that is no longer needed.
self->ReleaseClonedPrint(
aResponse.mCachedStaticDocumentBrowsingContext);
done->Reject(NS_ERROR_CONTENT_BLOCKED, __func__);
}
},
[done, self = RefPtr{this}](
contentanalysis::ContentAnalysis::PrintAllowedError
aErrorResponse) MOZ_CAN_RUN_SCRIPT_BOUNDARY_LAMBDA {
// Since we are not doing the second print in this case, release
// the clone that is no longer needed.
self->ReleaseClonedPrint(
aErrorResponse.mCachedStaticDocumentBrowsingContext);
done->Reject(aErrorResponse.mError, __func__);
});
return done;
}
# endif
return PrintWithNoContentAnalysis(aPrintSettings, false, nullptr);
#endif
}
void CanonicalBrowsingContext::ReleaseClonedPrint(
const MaybeDiscardedBrowsingContext& aClonedStaticBrowsingContext) {
#ifdef NS_PRINTING
auto* browserParent = GetBrowserParent();
if (NS_WARN_IF(!browserParent)) {
return;
}
Unused << browserParent->SendDestroyPrintClone(aClonedStaticBrowsingContext);
#endif
}
RefPtr<PrintPromise> CanonicalBrowsingContext::PrintWithNoContentAnalysis(
nsIPrintSettings* aPrintSettings, bool aForceStaticDocument,
const MaybeDiscardedBrowsingContext& aCachedStaticDocument) {
#ifndef NS_PRINTING
return PrintPromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE, __func__);
#else
auto promise = MakeRefPtr<PrintPromise::Private>(__func__);
auto listener = MakeRefPtr<PrintListenerAdapter>(promise);
if (IsInProcess()) {
RefPtr<nsGlobalWindowOuter> outerWindow =
nsGlobalWindowOuter::Cast(GetDOMWindow());
if (NS_WARN_IF(!outerWindow)) {
promise->Reject(NS_ERROR_FAILURE, __func__);
return promise;
}
ErrorResult rv;
listener->NoStaticCloneForPrintingWillBeCreated();
outerWindow->Print(aPrintSettings,
/* aRemotePrintJob = */ nullptr, listener,
/* aDocShellToCloneInto = */ nullptr,
nsGlobalWindowOuter::IsPreview::No,
nsGlobalWindowOuter::IsForWindowDotPrint::No,
/* aPrintPreviewCallback = */ nullptr,
/* aCachedBrowsingContext = */ nullptr, rv);
if (rv.Failed()) {
promise->Reject(rv.StealNSResult(), __func__);
}
return promise;
}
auto* browserParent = GetBrowserParent();
if (NS_WARN_IF(!browserParent)) {
promise->Reject(NS_ERROR_FAILURE, __func__);
return promise;
}
nsCOMPtr<nsIPrintSettingsService> printSettingsSvc =
do_GetService("@mozilla.org/gfx/printsettings-service;1");
if (NS_WARN_IF(!printSettingsSvc)) {
promise->Reject(NS_ERROR_FAILURE, __func__);
return promise;
}
nsresult rv;
nsCOMPtr<nsIPrintSettings> printSettings = aPrintSettings;
if (!printSettings) {
rv =
printSettingsSvc->CreateNewPrintSettings(getter_AddRefs(printSettings));
if (NS_WARN_IF(NS_FAILED(rv))) {
promise->Reject(rv, __func__);
return promise;
}
}
embedding::PrintData printData;
rv = printSettingsSvc->SerializeToPrintData(printSettings, &printData);
if (NS_WARN_IF(NS_FAILED(rv))) {
promise->Reject(rv, __func__);
return promise;
}
layout::RemotePrintJobParent* remotePrintJob =
new layout::RemotePrintJobParent(printSettings);
printData.remotePrintJob() =
browserParent->Manager()->SendPRemotePrintJobConstructor(remotePrintJob);
remotePrintJob->RegisterListener(listener);
if (!aCachedStaticDocument.IsNullOrDiscarded()) {
// There is no cloned static browsing context that
// SendPrintClonedPage() will return, so indicate this
// so listener can resolve its promise.
listener->NoStaticCloneForPrintingWillBeCreated();
if (NS_WARN_IF(!browserParent->SendPrintClonedPage(
this, printData, aCachedStaticDocument))) {
promise->Reject(NS_ERROR_FAILURE, __func__);
}
} else {
RefPtr<PBrowserParent::PrintPromise> printPromise =
browserParent->SendPrint(this, printData, aForceStaticDocument);
printPromise->Then(
GetMainThreadSerialEventTarget(), __func__,
[listener](MaybeDiscardedBrowsingContext cachedStaticDocument) {
// promise will get resolved by the listener
listener->StaticCloneForPrintingCreated(
std::move(cachedStaticDocument));
},
[promise](ResponseRejectReason reason) {
NS_WARNING("SendPrint() failed");
promise->Reject(NS_ERROR_FAILURE, __func__);
});
}
return promise.forget();
#endif
}
void CanonicalBrowsingContext::CallOnTopDescendants(
const FunctionRef<CallState(CanonicalBrowsingContext*)>& aCallback,
TopDescendantKind aKind) {
// Calling with All on something other than a chrome root is unlikely to be
// what you want, so lacking a use-case for it, we assert against it for now.
MOZ_ASSERT_IF(aKind == TopDescendantKind::All,
IsChrome() && !GetParentCrossChromeBoundary());
// Similarly, calling with {NonNested,All} on a non-top bc is unlikely to be
// what you want.
MOZ_ASSERT_IF(aKind != TopDescendantKind::ChildrenOnly, IsTop());
if (!IsInProcess()) {
// We rely on top levels having to be embedded in the parent process, so
// we can only have top level descendants if embedded here...
return;
}
const auto* ourTop = Top();
AutoTArray<RefPtr<BrowsingContextGroup>, 32> groups;
BrowsingContextGroup::GetAllGroups(groups);
for (auto& browsingContextGroup : groups) {
for (auto& topLevel : browsingContextGroup->Toplevels()) {
if (topLevel == ourTop) {
// A nested toplevel can't be a descendant of our same toplevel.
continue;
}
// Walk up the CanonicalBrowsingContext tree, looking for a match.
const bool topLevelIsRelevant = [&] {
auto* current = topLevel->Canonical();
while (auto* parent = current->GetParentCrossChromeBoundary()) {
if (parent == this) {
return true;
}
// If we've reached aKind's stop condition, break out early.
if (aKind == TopDescendantKind::ChildrenOnly ||
(aKind == TopDescendantKind::NonNested && parent->IsTop())) {
return false;
}
current = parent;
}
return false;
}();
if (!topLevelIsRelevant) {
continue;
}
if (aCallback(topLevel->Canonical()) == CallState::Stop) {
return;
}
}
}
}
void CanonicalBrowsingContext::SessionHistoryCommit(
uint64_t aLoadId, const nsID& aChangeID, uint32_t aLoadType,
bool aCloneEntryChildren, bool aChannelExpired, uint32_t aCacheKey) {
MOZ_LOG(gSHLog, LogLevel::Verbose,
("CanonicalBrowsingContext::SessionHistoryCommit %p %" PRIu64, this,
aLoadId));
MOZ_ASSERT(aLoadId != UINT64_MAX,
"Must not send special about:blank loadinfo to parent.");
for (size_t i = 0; i < mLoadingEntries.Length(); ++i) {
if (mLoadingEntries[i].mLoadId == aLoadId) {
nsSHistory* shistory = static_cast<nsSHistory*>(GetSessionHistory());
if (!shistory) {
SessionHistoryEntry::RemoveLoadId(aLoadId);
mLoadingEntries.RemoveElementAt(i);
return;
}
RefPtr<SessionHistoryEntry> newActiveEntry = mLoadingEntries[i].mEntry;
if (aCacheKey != 0) {
newActiveEntry->SetCacheKey(aCacheKey);
}
if (aChannelExpired) {
newActiveEntry->SharedInfo()->mExpired = true;
}
bool loadFromSessionHistory = !newActiveEntry->ForInitialLoad();
newActiveEntry->SetForInitialLoad(false);
SessionHistoryEntry::RemoveLoadId(aLoadId);
mLoadingEntries.RemoveElementAt(i);
int32_t indexOfHistoryLoad = -1;
if (loadFromSessionHistory) {
nsCOMPtr<nsISHEntry> root = nsSHistory::GetRootSHEntry(newActiveEntry);
indexOfHistoryLoad = shistory->GetIndexOfEntry(root);
if (indexOfHistoryLoad < 0) {
// Entry has been removed from the session history.
return;
}
}
CallerWillNotifyHistoryIndexAndLengthChanges caller(shistory);
// If there is a name in the new entry, clear the name of all contiguous
// entries. This is for https://html.spec.whatwg.org/#history-traversal
// Step 4.4.2.
nsAutoString nameOfNewEntry;
newActiveEntry->GetName(nameOfNewEntry);
if (!nameOfNewEntry.IsEmpty()) {
nsSHistory::WalkContiguousEntries(
newActiveEntry,
[](nsISHEntry* aEntry) { aEntry->SetName(EmptyString()); });
}
MOZ_LOG(gSHLog, LogLevel::Verbose,
("SessionHistoryCommit called with mActiveEntry=%p, "
"newActiveEntry=%p, "
"active entry list does%s contain the active entry.",
mActiveEntry.get(), newActiveEntry.get(),
mActiveEntryList.contains(mActiveEntry) ? "" : "n't"));
bool addEntry = ShouldUpdateSessionHistory(aLoadType);
if (IsTop()) {
if (mActiveEntry && !mActiveEntry->GetFrameLoader()) {
bool sharesDocument = true;
mActiveEntry->SharesDocumentWith(newActiveEntry, &sharesDocument);
if (!sharesDocument) {
// If the old page won't be in the bfcache,
// clear the dynamic entries.
RemoveDynEntriesFromActiveSessionHistoryEntry();
}
}
if (LOAD_TYPE_HAS_FLAGS(aLoadType,
nsIWebNavigation::LOAD_FLAGS_REPLACE_HISTORY)) {
// Replace the current entry with the new entry.
int32_t index = shistory->GetIndexForReplace();
// If we're trying to replace an inexistant shistory entry then we
// should append instead.
addEntry = index < 0;
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"IsTop: Replacing history with addEntry={}", addEntry);
if (!addEntry) {
shistory->ReplaceEntry(index, newActiveEntry);
if (Navigation::IsAPIEnabled() && mActiveEntry->isInList()) {
RefPtr entry = mActiveEntry;
while (entry) {
entry = entry->removeAndGetNext();
}
}
}
if (Navigation::IsAPIEnabled()) {
mActiveEntryList.insertBack(newActiveEntry);
}
mActiveEntry = newActiveEntry;
} else if (LOAD_TYPE_HAS_FLAGS(
aLoadType, nsIWebNavigation::LOAD_FLAGS_IS_REFRESH) &&
!ShouldAddEntryForRefresh(newActiveEntry) && mActiveEntry) {
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"IsTop: Refresh without adding entry");
addEntry = false;
mActiveEntry->ReplaceWith(*newActiveEntry);
} else if (!loadFromSessionHistory && mActiveEntry) {
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose, "IsTop: Adding new entry");
if (Navigation::IsAPIEnabled() && mActiveEntry->isInList()) {
bool isTransient = false;
mActiveEntry->IsTransient(&isTransient);
RefPtr entry =
isTransient ? mActiveEntry.get() : mActiveEntry->getNext();
while (entry) {
entry = entry->removeAndGetNext();
}
mActiveEntryList.insertBack(newActiveEntry);
}
mActiveEntry = newActiveEntry;
} else if (!mActiveEntry) {
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"IsTop: No active entry, adding new entry");
if (Navigation::IsAPIEnabled()) {
mActiveEntryList.insertBack(newActiveEntry);
}
mActiveEntry = newActiveEntry;
} else {
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"IsTop: Loading from session history");
mActiveEntry = newActiveEntry;
if (Navigation::IsAPIEnabled() && !mActiveEntry->isInList()) {
mActiveEntryList.insertBack(mActiveEntry);
}
}
if (loadFromSessionHistory) {
// XXX Synchronize browsing context tree and session history tree?
shistory->InternalSetRequestedIndex(indexOfHistoryLoad);
shistory->UpdateIndex();
if (IsTop()) {
mActiveEntry->SetWireframe(Nothing());
}
} else if (addEntry) {
shistory->AddEntry(mActiveEntry);
shistory->InternalSetRequestedIndex(-1);
}
} else {
// FIXME The old implementations adds it to the parent's mLSHE if there
// is one, need to figure out if that makes sense here (peterv
// doesn't think it would).
if (loadFromSessionHistory) {
if (mActiveEntry) {
// mActiveEntry is null if we're loading iframes from session
// history while also parent page is loading from session history.
// In that case there isn't anything to sync.
mActiveEntry->SyncTreesForSubframeNavigation(newActiveEntry, Top(),
this);
}
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"NotTop: Loading from session history");
mActiveEntry = newActiveEntry;
if (Navigation::IsAPIEnabled() && !mActiveEntry->isInList()) {
mActiveEntryList.insertBack(mActiveEntry);
}
shistory->InternalSetRequestedIndex(indexOfHistoryLoad);
// FIXME UpdateIndex() here may update index too early (but even the
// old implementation seems to have similar issues).
shistory->UpdateIndex();
} else if (addEntry) {
if (mActiveEntry) {
if (LOAD_TYPE_HAS_FLAGS(
aLoadType, nsIWebNavigation::LOAD_FLAGS_REPLACE_HISTORY) ||
(LOAD_TYPE_HAS_FLAGS(aLoadType,
nsIWebNavigation::LOAD_FLAGS_IS_REFRESH) &&
!ShouldAddEntryForRefresh(newActiveEntry))) {
// FIXME We need to make sure that when we create the info we
// make a copy of the shared state.
mActiveEntry->ReplaceWith(*newActiveEntry);
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"NotTop: replace current active entry");
} else {
// AddNestedSHEntry does update the index of the session
// history!
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"NotTop: Adding entry with an active entry");
shistory->AddNestedSHEntry(mActiveEntry, newActiveEntry, Top(),
aCloneEntryChildren);
if (Navigation::IsAPIEnabled()) {
if (!mActiveEntry->isInList()) {
mActiveEntryList.insertBack(mActiveEntry);
}
mActiveEntry->setNext(newActiveEntry);
}
mActiveEntry = newActiveEntry;
}
} else {
SessionHistoryEntry* parentEntry = GetParent()->mActiveEntry;
// XXX What should happen if parent doesn't have mActiveEntry?
// Or can that even happen ever?
if (parentEntry) {
MOZ_LOG_FMT(gSHLog, LogLevel::Verbose,
"NotTop: Adding entry without an active entry");
mActiveEntry = newActiveEntry;
if (Navigation::IsAPIEnabled()) {
mActiveEntryList.insertBack(mActiveEntry);
}
// FIXME Using IsInProcess for aUseRemoteSubframes isn't quite
// right, but aUseRemoteSubframes should be going away.
parentEntry->AddChild(
mActiveEntry,
CreatedDynamically() ? -1 : GetParent()->IndexOf(this),
IsInProcess());
}
}
shistory->InternalSetRequestedIndex(-1);
}
}
ResetSHEntryHasUserInteractionCache();
HistoryCommitIndexAndLength(aChangeID, caller);
shistory->LogHistory();
return;
}
// XXX Should the loading entries before [i] be removed?
}
// FIXME Should we throw an error if we don't find an entry for
// aSessionHistoryEntryId?
}
already_AddRefed<nsDocShellLoadState> CanonicalBrowsingContext::CreateLoadInfo(
SessionHistoryEntry* aEntry) {
const SessionHistoryInfo& info = aEntry->Info();
RefPtr<nsDocShellLoadState> loadState(new nsDocShellLoadState(info.GetURI()));
info.FillLoadInfo(*loadState);
UniquePtr<LoadingSessionHistoryInfo> loadingInfo;
loadingInfo = MakeUnique<LoadingSessionHistoryInfo>(aEntry);
mLoadingEntries.AppendElement(
LoadingSessionHistoryEntry{loadingInfo->mLoadId, aEntry});
loadState->SetLoadingSessionHistoryInfo(std::move(loadingInfo));
return loadState.forget();
}
void CanonicalBrowsingContext::NotifyOnHistoryReload(
bool aForceReload, bool& aCanReload,
Maybe<NotNull<RefPtr<nsDocShellLoadState>>>& aLoadState,
Maybe<bool>& aReloadActiveEntry) {
MOZ_DIAGNOSTIC_ASSERT(!aLoadState);
aCanReload = true;
nsISHistory* shistory = GetSessionHistory();
NS_ENSURE_TRUE_VOID(shistory);
shistory->NotifyOnHistoryReload(&aCanReload);
if (!aCanReload) {
return;
}
if (mActiveEntry) {
aLoadState.emplace(WrapMovingNotNull(RefPtr{CreateLoadInfo(mActiveEntry)}));
aReloadActiveEntry.emplace(true);
if (aForceReload) {
shistory->RemoveFrameEntries(mActiveEntry);
}
} else if (!mLoadingEntries.IsEmpty()) {
const LoadingSessionHistoryEntry& loadingEntry =
mLoadingEntries.LastElement();
uint64_t loadId = loadingEntry.mLoadId;
aLoadState.emplace(
WrapMovingNotNull(RefPtr{CreateLoadInfo(loadingEntry.mEntry)}));
aReloadActiveEntry.emplace(false);
if (aForceReload) {
SessionHistoryEntry::LoadingEntry* entry =
SessionHistoryEntry::GetByLoadId(loadId);
if (entry) {
shistory->RemoveFrameEntries(entry->mEntry);
}
}
}
if (aLoadState) {
// Use 0 as the offset, since aLoadState will be be used for reload.
aLoadState.ref()->SetLoadIsFromSessionHistory(0,
aReloadActiveEntry.value());
}
// If we don't have an active entry and we don't have a loading entry then
// the nsDocShell will create a load state based on its document.
}
void CanonicalBrowsingContext::SetActiveSessionHistoryEntry(
const Maybe<nsPoint>& aPreviousScrollPos, SessionHistoryInfo* aInfo,
uint32_t aLoadType, uint32_t aUpdatedCacheKey, const nsID& aChangeID) {
nsISHistory* shistory = GetSessionHistory();
if (!shistory) {
return;
}
CallerWillNotifyHistoryIndexAndLengthChanges caller(shistory);
RefPtr<SessionHistoryEntry> oldActiveEntry = mActiveEntry;
if (aPreviousScrollPos.isSome() && oldActiveEntry) {
oldActiveEntry->SetScrollPosition(aPreviousScrollPos.ref().x,
aPreviousScrollPos.ref().y);
}
mActiveEntry = new SessionHistoryEntry(aInfo);
mActiveEntry->SetDocshellID(GetHistoryID());
mActiveEntry->AdoptBFCacheEntry(oldActiveEntry);
if (aUpdatedCacheKey != 0) {
mActiveEntry->SharedInfo()->mCacheKey = aUpdatedCacheKey;
}
if (IsTop()) {
Maybe<int32_t> previousEntryIndex, loadedEntryIndex;
shistory->AddToRootSessionHistory(true, oldActiveEntry, this, mActiveEntry,
aLoadType, &previousEntryIndex,
&loadedEntryIndex);
} else {
if (oldActiveEntry) {
shistory->AddNestedSHEntry(oldActiveEntry, mActiveEntry, Top(), true);
} else if (GetParent() && GetParent()->mActiveEntry) {
GetParent()->mActiveEntry->AddChild(
mActiveEntry, CreatedDynamically() ? -1 : GetParent()->IndexOf(this),
UseRemoteSubframes());
}
}
MOZ_LOG(
gSHLog, LogLevel::Verbose,
("SetActiveSessionHistoryEntry called with oldActiveEntry=%p, "
"mActiveEntry=%p, active entry list does%s contain the active entry. ",
oldActiveEntry.get(), mActiveEntry.get(),
mActiveEntryList.contains(mActiveEntry) ? "" : "n't"));
if (Navigation::IsAPIEnabled() &&
(!oldActiveEntry || oldActiveEntry->isInList())) {
RefPtr toRemove = oldActiveEntry ? oldActiveEntry->getNext()
: mActiveEntryList.getFirst();
while (toRemove) {
toRemove = toRemove->removeAndGetNext();
}
mActiveEntryList.insertBack(mActiveEntry);
}
ResetSHEntryHasUserInteractionCache();
shistory->InternalSetRequestedIndex(-1);
// FIXME Need to do the equivalent of EvictDocumentViewersOrReplaceEntry.
HistoryCommitIndexAndLength(aChangeID, caller);
static_cast<nsSHistory*>(shistory)->LogHistory();
}
void CanonicalBrowsingContext::ReplaceActiveSessionHistoryEntry(
SessionHistoryInfo* aInfo) {
if (!mActiveEntry) {
return;
}
// aInfo comes from the entry stored in the current document's docshell, whose
// interaction state does not get updated. So we instead propagate state from
// the previous canonical entry. See bug 1917369.
const bool hasUserInteraction = mActiveEntry->GetHasUserInteraction();
mActiveEntry->SetInfo(aInfo);
mActiveEntry->SetHasUserInteraction(hasUserInteraction);
// Notify children of the update
nsSHistory* shistory = static_cast<nsSHistory*>(GetSessionHistory());
if (shistory) {
shistory->NotifyOnHistoryReplaceEntry();
}
ResetSHEntryHasUserInteractionCache();
if (IsTop()) {
mActiveEntry->SetWireframe(Nothing());
}
MOZ_LOG(gSHLog, LogLevel::Verbose,
("Replacing active session history entry"));
if (Navigation::IsAPIEnabled() && mActiveEntry->isInList()) {
RefPtr toRemove = mActiveEntry->getNext();
while (toRemove) {
toRemove = toRemove->removeAndGetNext();
}
}
// FIXME Need to do the equivalent of EvictDocumentViewersOrReplaceEntry.
}
void CanonicalBrowsingContext::RemoveDynEntriesFromActiveSessionHistoryEntry() {
nsISHistory* shistory = GetSessionHistory();
// In theory shistory can be null here if the method is called right after
// CanonicalBrowsingContext::ReplacedBy call.
NS_ENSURE_TRUE_VOID(shistory);
nsCOMPtr<nsISHEntry> root = nsSHistory::GetRootSHEntry(mActiveEntry);
shistory->RemoveDynEntries(shistory->GetIndexOfEntry(root), mActiveEntry);
}
void CanonicalBrowsingContext::RemoveFromSessionHistory(const nsID& aChangeID) {
nsSHistory* shistory = static_cast<nsSHistory*>(GetSessionHistory());
if (shistory) {
CallerWillNotifyHistoryIndexAndLengthChanges caller(shistory);
nsCOMPtr<nsISHEntry> root = nsSHistory::GetRootSHEntry(mActiveEntry);
bool didRemove;
AutoTArray<nsID, 16> ids({GetHistoryID()});
shistory->RemoveEntries(ids, shistory->GetIndexOfEntry(root), &didRemove);
if (didRemove) {
RefPtr<BrowsingContext> rootBC = shistory->GetBrowsingContext();
if (rootBC) {
if (!rootBC->IsInProcess()) {
if (ContentParent* cp = rootBC->Canonical()->GetContentParent()) {
Unused << cp->SendDispatchLocationChangeEvent(rootBC);
}
} else if (rootBC->GetDocShell()) {
rootBC->GetDocShell()->DispatchLocationChangeEvent();
}
}
}
HistoryCommitIndexAndLength(aChangeID, caller);
}
}
Maybe<int32_t> CanonicalBrowsingContext::HistoryGo(
int32_t aOffset, uint64_t aHistoryEpoch, bool aRequireUserInteraction,
bool aUserActivation, Maybe<ContentParentId> aContentId) {
if (aRequireUserInteraction && aOffset != -1 && aOffset != 1) {
NS_ERROR(
"aRequireUserInteraction may only be used with an offset of -1 or 1");
return Nothing();
}
nsSHistory* shistory = static_cast<nsSHistory*>(GetSessionHistory());
if (!shistory) {
return Nothing();
}
CheckedInt<int32_t> index = shistory->GetRequestedIndex() >= 0
? shistory->GetRequestedIndex()
: shistory->Index();
MOZ_LOG(gSHLog, LogLevel::Debug,
("HistoryGo(%d->%d) epoch %" PRIu64 "/id %" PRIu64, aOffset,
(index + aOffset).value(), aHistoryEpoch,
(uint64_t)(aContentId.isSome() ? aContentId.value() : 0)));
while (true) {
index += aOffset;
if (!index.isValid()) {
MOZ_LOG(gSHLog, LogLevel::Debug, ("Invalid index"));
return Nothing();
}
// Check for user interaction if desired, except for the first and last
// history entries. We compare with >= to account for the case where
// aOffset >= length.
if (!StaticPrefs::browser_navigation_requireUserInteraction() ||
!aRequireUserInteraction || index.value() >= shistory->Length() - 1 ||
index.value() <= 0) {
break;
}
if (shistory->HasUserInteractionAtIndex(index.value())) {
break;
}
}
// Implement aborting additional history navigations from within the same
// event spin of the content process.
uint64_t epoch;
bool sameEpoch = false;
Maybe<ContentParentId> id;
shistory->GetEpoch(epoch, id);
if (aContentId == id && epoch >= aHistoryEpoch) {
sameEpoch = true;
MOZ_LOG(gSHLog, LogLevel::Debug, ("Same epoch/id"));
}
// Don't update the epoch until we know if the target index is valid
// GoToIndex checks that index is >= 0 and < length.
nsTArray<nsSHistory::LoadEntryResult> loadResults;
nsresult rv = shistory->GotoIndex(index.value(), loadResults, sameEpoch,
aOffset == 0, aUserActivation);
if (NS_FAILED(rv)) {
MOZ_LOG(gSHLog, LogLevel::Debug,
("Dropping HistoryGo - bad index or same epoch (not in same doc)"));
return Nothing();
}
if (epoch < aHistoryEpoch || aContentId != id) {
MOZ_LOG(gSHLog, LogLevel::Debug, ("Set epoch"));
shistory->SetEpoch(aHistoryEpoch, aContentId);
}
int32_t requestedIndex = shistory->GetRequestedIndex();
RefPtr traversable = Top();
nsSHistory::LoadURIs(loadResults, traversable);
return Some(requestedIndex);
}
JSObject* CanonicalBrowsingContext::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return CanonicalBrowsingContext_Binding::Wrap(aCx, this, aGivenProto);
}
void CanonicalBrowsingContext::DispatchWheelZoomChange(bool aIncrease) {
Element* element = Top()->GetEmbedderElement();
if (!element) {
return;
}
auto event = aIncrease ? u"DoZoomEnlargeBy10"_ns : u"DoZoomReduceBy10"_ns;
auto dispatcher = MakeRefPtr<AsyncEventDispatcher>(
element, event, CanBubble::eYes, ChromeOnlyDispatch::eYes);
dispatcher->PostDOMEvent();
}
void CanonicalBrowsingContext::CanonicalDiscard() {
if (mTabMediaController) {
mTabMediaController->Shutdown();
mTabMediaController = nullptr;
}
if (mCurrentLoad) {
mCurrentLoad->Cancel(NS_BINDING_ABORTED,
"CanonicalBrowsingContext::CanonicalDiscard"_ns);
}
if (mWebProgress) {
RefPtr<BrowsingContextWebProgress> progress = mWebProgress;
progress->ContextDiscarded();
}
if (IsTop()) {
BackgroundSessionStorageManager::RemoveManager(Id());
}
CancelSessionStoreUpdate();
if (UsePrivateBrowsing() && EverAttached() && IsContent()) {
DecreasePrivateCount();
}
}
void CanonicalBrowsingContext::CanonicalAttach() {
if (UsePrivateBrowsing() && IsContent()) {
IncreasePrivateCount();
}
}
void CanonicalBrowsingContext::AddPendingDiscard() {
MOZ_ASSERT(!mFullyDiscarded);
mPendingDiscards++;
}
void CanonicalBrowsingContext::RemovePendingDiscard() {
mPendingDiscards--;
if (!mPendingDiscards) {
mFullyDiscarded = true;
auto listeners = std::move(mFullyDiscardedListeners);
for (const auto& listener : listeners) {
listener(Id());
}
}
}
void CanonicalBrowsingContext::AddFinalDiscardListener(
std::function<void(uint64_t)>&& aListener) {
if (mFullyDiscarded) {
aListener(Id());
return;
}
mFullyDiscardedListeners.AppendElement(std::move(aListener));
}
void CanonicalBrowsingContext::SetForceAppWindowActive(bool aForceActive,
ErrorResult& aRv) {
MOZ_DIAGNOSTIC_ASSERT(IsChrome());
MOZ_DIAGNOSTIC_ASSERT(IsTop());
if (!IsChrome() || !IsTop()) {
return aRv.ThrowNotAllowedError(
"You shouldn't need to force this BrowsingContext to be active, use "
".isActive instead");
}
if (mForceAppWindowActive == aForceActive) {
return;
}
mForceAppWindowActive = aForceActive;
RecomputeAppWindowVisibility();
}
void CanonicalBrowsingContext::RecomputeAppWindowVisibility() {
MOZ_RELEASE_ASSERT(IsChrome());
MOZ_RELEASE_ASSERT(IsTop());
const bool wasAlreadyActive = IsActive();
nsCOMPtr<nsIWidget> widget;
if (auto* docShell = GetDocShell()) {
nsDocShell::Cast(docShell)->GetMainWidget(getter_AddRefs(widget));
}
Unused << NS_WARN_IF(!widget);
const bool isNowActive =
ForceAppWindowActive() || (widget && !widget->IsFullyOccluded() &&
widget->SizeMode() != nsSizeMode_Minimized);
if (isNowActive == wasAlreadyActive) {
return;
}
SetIsActiveInternal(isNowActive, IgnoreErrors());
if (widget) {
// Pause if we are not active, resume if we are active.
widget->PauseOrResumeCompositor(!isNowActive);
}
}
void CanonicalBrowsingContext::AdjustPrivateBrowsingCount(
bool aPrivateBrowsing) {
if (IsDiscarded() || !EverAttached() || IsChrome()) {
return;
}
MOZ_DIAGNOSTIC_ASSERT(aPrivateBrowsing == UsePrivateBrowsing());
if (aPrivateBrowsing) {
IncreasePrivateCount();
} else {
DecreasePrivateCount();
}
}
void CanonicalBrowsingContext::NotifyStartDelayedAutoplayMedia() {
WindowContext* windowContext = GetCurrentWindowContext();
if (!windowContext) {
return;
}
// As this function would only be called when user click the play icon on the
// tab bar. That's clear user intent to play, so gesture activate the window
// context so that the block-autoplay logic allows the media to autoplay.
windowContext->NotifyUserGestureActivation();
AUTOPLAY_LOG("NotifyStartDelayedAutoplayMedia for chrome bc 0x%08" PRIx64,
Id());
StartDelayedAutoplayMediaComponents();
// Notfiy all content browsing contexts which are related with the canonical
// browsing content tree to start delayed autoplay media.
Group()->EachParent([&](ContentParent* aParent) {
Unused << aParent->SendStartDelayedAutoplayMediaComponents(this);
});
}
void CanonicalBrowsingContext::NotifyMediaMutedChanged(bool aMuted,
ErrorResult& aRv) {
MOZ_ASSERT(!GetParent(),
"Notify media mute change on non top-level context!");
SetMuted(aMuted, aRv);
}
uint32_t CanonicalBrowsingContext::CountSiteOrigins(
GlobalObject& aGlobal,
const Sequence<OwningNonNull<BrowsingContext>>& aRoots) {
nsTHashSet<nsCString> uniqueSiteOrigins;
for (const auto& root : aRoots) {
root->PreOrderWalk([&](BrowsingContext* aContext) {
WindowGlobalParent* windowGlobalParent =
aContext->Canonical()->GetCurrentWindowGlobal();
if (windowGlobalParent) {
nsIPrincipal* documentPrincipal =
windowGlobalParent->DocumentPrincipal();
bool isContentPrincipal = documentPrincipal->GetIsContentPrincipal();
if (isContentPrincipal) {
nsCString siteOrigin;
documentPrincipal->GetSiteOrigin(siteOrigin);
uniqueSiteOrigins.Insert(siteOrigin);
}
}
});
}
return uniqueSiteOrigins.Count();
}
/* static */
bool CanonicalBrowsingContext::IsPrivateBrowsingActive() {
return gNumberOfPrivateContexts > 0;
}
void CanonicalBrowsingContext::UpdateMediaControlAction(
const MediaControlAction& aAction) {
if (IsDiscarded()) {
return;
}
ContentMediaControlKeyHandler::HandleMediaControlAction(this, aAction);
Group()->EachParent([&](ContentParent* aParent) {
Unused << aParent->SendUpdateMediaControlAction(this, aAction);
});
}
void CanonicalBrowsingContext::LoadURI(nsIURI* aURI,
const LoadURIOptions& aOptions,
ErrorResult& aError) {
RefPtr<nsDocShellLoadState> loadState;
nsresult rv = nsDocShellLoadState::CreateFromLoadURIOptions(
this, aURI, aOptions, getter_AddRefs(loadState));
MOZ_ASSERT(rv != NS_ERROR_MALFORMED_URI);
if (NS_FAILED(rv)) {
aError.Throw(rv);
return;
}
LoadURI(loadState, true);
}
void CanonicalBrowsingContext::FixupAndLoadURIString(
const nsAString& aURI, const LoadURIOptions& aOptions,
ErrorResult& aError) {
RefPtr<nsDocShellLoadState> loadState;
nsresult rv = nsDocShellLoadState::CreateFromLoadURIOptions(
this, aURI, aOptions, getter_AddRefs(loadState));
if (rv == NS_ERROR_MALFORMED_URI) {
DisplayLoadError(aURI);
return;
}
if (NS_FAILED(rv)) {
aError.Throw(rv);
return;
}
LoadURI(loadState, true);
}
void CanonicalBrowsingContext::GoBack(
const Optional<int32_t>& aCancelContentJSEpoch,
bool aRequireUserInteraction, bool aUserActivation) {
if (IsDiscarded()) {
return;
}
// Stop any known network loads if necessary.
if (mCurrentLoad) {
mCurrentLoad->Cancel(NS_BINDING_CANCELLED_OLD_LOAD, ""_ns);
}
if (RefPtr<nsDocShell> docShell = nsDocShell::Cast(GetDocShell())) {
if (aCancelContentJSEpoch.WasPassed()) {
docShell->SetCancelContentJSEpoch(aCancelContentJSEpoch.Value());
}
docShell->GoBack(aRequireUserInteraction, aUserActivation);
} else if (ContentParent* cp = GetContentParent()) {
Maybe<int32_t> cancelContentJSEpoch;
if (aCancelContentJSEpoch.WasPassed()) {
cancelContentJSEpoch = Some(aCancelContentJSEpoch.Value());
}
Unused << cp->SendGoBack(this, cancelContentJSEpoch,
aRequireUserInteraction, aUserActivation);
}
}
void CanonicalBrowsingContext::GoForward(
const Optional<int32_t>& aCancelContentJSEpoch,
bool aRequireUserInteraction, bool aUserActivation) {
if (IsDiscarded()) {
return;
}
// Stop any known network loads if necessary.
if (mCurrentLoad) {
mCurrentLoad->Cancel(NS_BINDING_CANCELLED_OLD_LOAD, ""_ns);
}
if (RefPtr<nsDocShell> docShell = nsDocShell::Cast(GetDocShell())) {
if (aCancelContentJSEpoch.WasPassed()) {
docShell->SetCancelContentJSEpoch(aCancelContentJSEpoch.Value());
}
docShell->GoForward(aRequireUserInteraction, aUserActivation);
} else if (ContentParent* cp = GetContentParent()) {
Maybe<int32_t> cancelContentJSEpoch;
if (aCancelContentJSEpoch.WasPassed()) {
cancelContentJSEpoch.emplace(aCancelContentJSEpoch.Value());
}
Unused << cp->SendGoForward(this, cancelContentJSEpoch,
aRequireUserInteraction, aUserActivation);
}
}
void CanonicalBrowsingContext::GoToIndex(
int32_t aIndex, const Optional<int32_t>& aCancelContentJSEpoch,
bool aUserActivation) {
if (IsDiscarded()) {
return;
}
// Stop any known network loads if necessary.
if (mCurrentLoad) {
mCurrentLoad->Cancel(NS_BINDING_CANCELLED_OLD_LOAD, ""_ns);
}
if (RefPtr<nsDocShell> docShell = nsDocShell::Cast(GetDocShell())) {
if (aCancelContentJSEpoch.WasPassed()) {
docShell->SetCancelContentJSEpoch(aCancelContentJSEpoch.Value());
}
docShell->GotoIndex(aIndex, aUserActivation);
} else if (ContentParent* cp = GetContentParent()) {
Maybe<int32_t> cancelContentJSEpoch;
if (aCancelContentJSEpoch.WasPassed()) {
cancelContentJSEpoch.emplace(aCancelContentJSEpoch.Value());
}
Unused << cp->SendGoToIndex(this, aIndex, cancelContentJSEpoch,
aUserActivation);
}
}
void CanonicalBrowsingContext::Reload(uint32_t aReloadFlags) {
if (IsDiscarded()) {
return;
}
// Stop any known network loads if necessary.
if (mCurrentLoad) {
mCurrentLoad->Cancel(NS_BINDING_CANCELLED_OLD_LOAD, ""_ns);
}
if (RefPtr<nsDocShell> docShell = nsDocShell::Cast(GetDocShell())) {
docShell->Reload(aReloadFlags);
} else if (ContentParent* cp = GetContentParent()) {
Unused << cp->SendReload(this, aReloadFlags);
}
}
void CanonicalBrowsingContext::Stop(uint32_t aStopFlags) {
if (IsDiscarded()) {
return;
}
// Stop any known network loads if necessary.
if (mCurrentLoad && (aStopFlags & nsIWebNavigation::STOP_NETWORK)) {
mCurrentLoad->Cancel(NS_BINDING_ABORTED,
"CanonicalBrowsingContext::Stop"_ns);
}
// Ask the docshell to stop to handle loads that haven't
// yet reached here, as well as non-network activity.
if (auto* docShell = nsDocShell::Cast(GetDocShell())) {
docShell->Stop(aStopFlags);
} else if (ContentParent* cp = GetContentParent()) {
Unused << cp->SendStopLoad(this, aStopFlags);
}
}
void CanonicalBrowsingContext::PendingRemotenessChange::ProcessLaunched() {
if (!mPromise) {
return;
}
if (mContentParentKeepAlive) {
// If our new content process is still unloading from a previous process
// switch, wait for that unload to complete before continuing.
auto found = mTarget->FindUnloadingHost(mContentParentKeepAlive->ChildID());
if (found != mTarget->mUnloadingHosts.end()) {
found->mCallbacks.AppendElement(
[self = RefPtr{this}]()
MOZ_CAN_RUN_SCRIPT_BOUNDARY_LAMBDA { self->ProcessReady(); });
return;
}
}
ProcessReady();
}
void CanonicalBrowsingContext::PendingRemotenessChange::ProcessReady() {
if (!mPromise) {
return;
}
MOZ_ASSERT(!mProcessReady);
mProcessReady = true;
MaybeFinish();
}
void CanonicalBrowsingContext::PendingRemotenessChange::MaybeFinish() {
if (!mPromise) {
return;
}
if (!mProcessReady || mWaitingForPrepareToChange) {
return;
}
// If this BrowsingContext is embedded within the parent process, perform the
// process switch directly.
nsresult rv = mTarget->IsTopContent() ? FinishTopContent() : FinishSubframe();
if (NS_FAILED(rv)) {
NS_WARNING("Error finishing PendingRemotenessChange!");
Cancel(rv);
} else {
Clear();
}
}
// Logic for finishing a toplevel process change embedded within the parent
// process. Due to frontend integration the logic differs substantially from
// subframe process switches, and is handled separately.
nsresult CanonicalBrowsingContext::PendingRemotenessChange::FinishTopContent() {
MOZ_DIAGNOSTIC_ASSERT(mTarget->IsTop(),
"We shouldn't be trying to change the remoteness of "
"non-remote iframes");
// Abort if our ContentParent died while process switching.
if (mContentParentKeepAlive &&
NS_WARN_IF(mContentParentKeepAlive->IsShuttingDown())) {
return NS_ERROR_FAILURE;
}
// While process switching, we need to check if any of our ancestors are
// discarded or no longer current, in which case the process switch needs to
// be aborted.
RefPtr<CanonicalBrowsingContext> target(mTarget);
if (target->IsDiscarded() || !target->AncestorsAreCurrent()) {
return NS_ERROR_FAILURE;
}
Element* browserElement = target->GetEmbedderElement();
if (!browserElement) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIBrowser> browser = browserElement->AsBrowser();
if (!browser) {
return NS_ERROR_FAILURE;
}
RefPtr<nsFrameLoaderOwner> frameLoaderOwner = do_QueryObject(browserElement);
MOZ_RELEASE_ASSERT(frameLoaderOwner,
"embedder browser must be nsFrameLoaderOwner");
// If we're process switching a browsing context in private browsing
// mode we might decrease the private browsing count to '0', which
// would make us fire "last-pb-context-exited" and drop the private
// session. To prevent that we artificially increment the number of
// private browsing contexts with '1' until the process switch is done.
bool usePrivateBrowsing = mTarget->UsePrivateBrowsing();
if (usePrivateBrowsing) {
IncreasePrivateCount();
}
auto restorePrivateCount = MakeScopeExit([usePrivateBrowsing]() {
if (usePrivateBrowsing) {
DecreasePrivateCount();
}
});
// Tell frontend code that this browser element is about to change process.
nsresult rv = browser->BeforeChangeRemoteness();
if (NS_FAILED(rv)) {
return rv;
}
// Some frontend code checks the value of the `remote` attribute on the
// browser to determine if it is remote, so update the value.
browserElement->SetAttr(kNameSpaceID_None, nsGkAtoms::remote,
mContentParentKeepAlive ? u"true"_ns : u"false"_ns,
/* notify */ true);
// The process has been created, hand off to nsFrameLoaderOwner to finish
// the process switch.
ErrorResult error;
RefPtr keepAlive = mContentParentKeepAlive.get();
RefPtr specificGroup = mSpecificGroup;
frameLoaderOwner->ChangeRemotenessToProcess(keepAlive, mOptions,
specificGroup, error);
if (error.Failed()) {
return error.StealNSResult();
}
// Tell frontend the load is done.
bool loadResumed = false;
rv = browser->FinishChangeRemoteness(mPendingSwitchId, &loadResumed);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// We did it! The process switch is complete.
RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader();
RefPtr<BrowserParent> newBrowser = frameLoader->GetBrowserParent();
if (!newBrowser) {
if (mContentParentKeepAlive) {
// Failed to create the BrowserParent somehow! Abort the process switch
// attempt.
return NS_ERROR_UNEXPECTED;
}
if (!loadResumed) {
RefPtr<nsDocShell> newDocShell = frameLoader->GetDocShell(error);
if (error.Failed()) {
return error.StealNSResult();
}
rv = newDocShell->ResumeRedirectedLoad(mPendingSwitchId,
/* aHistoryIndex */ -1);
if (NS_FAILED(rv)) {
return rv;
}
}
} else if (!loadResumed) {
newBrowser->ResumeLoad(mPendingSwitchId);
}
mPromise->Resolve(
std::pair{newBrowser,
RefPtr{frameLoader->GetBrowsingContext()->Canonical()}},
__func__);
return NS_OK;
}
nsresult CanonicalBrowsingContext::PendingRemotenessChange::FinishSubframe() {
MOZ_DIAGNOSTIC_ASSERT(!mOptions.mReplaceBrowsingContext,
"Cannot replace BC for subframe");
MOZ_DIAGNOSTIC_ASSERT(!mTarget->IsTop());
// While process switching, we need to check if any of our ancestors are
// discarded or no longer current, in which case the process switch needs to
// be aborted.
RefPtr<CanonicalBrowsingContext> target(mTarget);
if (target->IsDiscarded() || !target->AncestorsAreCurrent()) {
return NS_ERROR_FAILURE;
}
if (NS_WARN_IF(!mContentParentKeepAlive)) {
return NS_ERROR_FAILURE;
}
RefPtr<WindowGlobalParent> embedderWindow = target->GetParentWindowContext();
if (NS_WARN_IF(!embedderWindow) || NS_WARN_IF(!embedderWindow->CanSend())) {
return NS_ERROR_FAILURE;
}
RefPtr<BrowserParent> embedderBrowser = embedderWindow->GetBrowserParent();
if (NS_WARN_IF(!embedderBrowser)) {
return NS_ERROR_FAILURE;
}
// If we're creating a new remote browser, and the host process is already
// dead, abort the process switch.
if (mContentParentKeepAlive != embedderBrowser->Manager() &&
NS_WARN_IF(mContentParentKeepAlive->IsShuttingDown())) {
return NS_ERROR_FAILURE;
}
RefPtr<BrowserParent> oldBrowser = target->GetBrowserParent();
target->SetCurrentBrowserParent(nullptr);
// If we were in a remote frame, trigger unloading of the remote window. The
// previous BrowserParent is registered in `mUnloadingHosts` and will only be
// cleared when the BrowserParent is fully destroyed.
bool wasRemote = oldBrowser && oldBrowser->GetBrowsingContext() == target;
if (wasRemote) {
MOZ_DIAGNOSTIC_ASSERT(oldBrowser != embedderBrowser);
MOZ_DIAGNOSTIC_ASSERT(oldBrowser->IsDestroyed() ||
oldBrowser->GetBrowserBridgeParent());
// `oldBrowser` will clear the `UnloadingHost` status once the actor has
// been destroyed.
if (oldBrowser->CanSend()) {
target->StartUnloadingHost(oldBrowser->Manager()->ChildID());
Unused << oldBrowser->SendWillChangeProcess();
oldBrowser->Destroy();
}
}
// Update which process is considered the current owner
target->SetOwnerProcessId(mContentParentKeepAlive->ChildID());
// If we're switching from remote to local, we don't need to create a
// BrowserBridge, and can instead perform the switch directly.
if (mContentParentKeepAlive == embedderBrowser->Manager()) {
MOZ_DIAGNOSTIC_ASSERT(
mPendingSwitchId,
"We always have a PendingSwitchId, except for print-preview loads, "
"which will never perform a process-switch to being in-process with "
"their embedder");
MOZ_DIAGNOSTIC_ASSERT(wasRemote,
"Attempt to process-switch from local to local?");
target->SetCurrentBrowserParent(embedderBrowser);
Unused << embedderWindow->SendMakeFrameLocal(target, mPendingSwitchId);
mPromise->Resolve(std::pair{embedderBrowser, target}, __func__);
return NS_OK;
}
// The BrowsingContext will be remote, either as an already-remote frame
// changing processes, or as a local frame becoming remote. Construct a new
// BrowserBridgeParent to host the remote content.
target->SetCurrentBrowserParent(nullptr);
MOZ_DIAGNOSTIC_ASSERT(target->UseRemoteTabs() && target->UseRemoteSubframes(),
"Not supported without fission");
uint32_t chromeFlags = nsIWebBrowserChrome::CHROME_REMOTE_WINDOW |
nsIWebBrowserChrome::CHROME_FISSION_WINDOW;
if (target->UsePrivateBrowsing()) {
chromeFlags |= nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW;
}
nsCOMPtr<nsIPrincipal> initialPrincipal =
NullPrincipal::Create(target->OriginAttributesRef());
WindowGlobalInit windowInit =
WindowGlobalActor::AboutBlankInitializer(target, initialPrincipal);
// Create and initialize our new BrowserBridgeParent.
TabId tabId(nsContentUtils::GenerateTabId());
RefPtr<BrowserBridgeParent> bridge = new BrowserBridgeParent();
nsresult rv =
bridge->InitWithProcess(embedderBrowser, mContentParentKeepAlive.get(),
windowInit, chromeFlags, tabId);
if (NS_WARN_IF(NS_FAILED(rv))) {
// If we've already destroyed our previous document, make a best-effort
// attempt to recover from this failure and show the crashed tab UI. We only
// do this in the previously-remote case, as previously in-process frames
// will have their navigation cancelled, and will remain visible.
if (wasRemote) {
target->ShowSubframeCrashedUI(oldBrowser->GetBrowserBridgeParent());
}
return rv;
}
// Tell the embedder process a remoteness change is in-process. When this is
// acknowledged, reset the in-flight ID if it used to be an in-process load.
RefPtr<BrowserParent> newBrowser = bridge->GetBrowserParent();
{
// If we weren't remote, mark our embedder window browser as unloading until
// our embedder process has acked our MakeFrameRemote message.
Maybe<uint64_t> clearChildID;
if (!wasRemote) {
clearChildID = Some(embedderBrowser->Manager()->ChildID());
target->StartUnloadingHost(*clearChildID);
}
auto callback = [target, clearChildID](auto&&) {
if (clearChildID) {
target->ClearUnloadingHost(*clearChildID);
}
};
ManagedEndpoint<PBrowserBridgeChild> endpoint =
embedderBrowser->OpenPBrowserBridgeEndpoint(bridge);
MOZ_DIAGNOSTIC_ASSERT(endpoint.IsValid());
embedderWindow->SendMakeFrameRemote(target, std::move(endpoint), tabId,
newBrowser->GetLayersId(), callback,
callback);
}
// Resume the pending load in our new process.
if (mPendingSwitchId) {
newBrowser->ResumeLoad(mPendingSwitchId);
}
// We did it! The process switch is complete.
mPromise->Resolve(std::pair{newBrowser, target}, __func__);
return NS_OK;
}
void CanonicalBrowsingContext::PendingRemotenessChange::Cancel(nsresult aRv) {
if (!mPromise) {
return;
}
mPromise->Reject(aRv, __func__);
Clear();
}
void CanonicalBrowsingContext::PendingRemotenessChange::Clear() {
// Make sure we don't die while we're doing cleanup.
RefPtr<PendingRemotenessChange> kungFuDeathGrip(this);
if (mTarget) {
MOZ_DIAGNOSTIC_ASSERT(mTarget->mPendingRemotenessChange == this);
mTarget->mPendingRemotenessChange = nullptr;
}
// When this PendingRemotenessChange was created, it was given a
// `mContentParentKeepAlive`.
mContentParentKeepAlive = nullptr;
// If we were given a specific group, stop keeping that group alive manually.
if (mSpecificGroup) {
mSpecificGroup->RemoveKeepAlive();
mSpecificGroup = nullptr;
}
mPromise = nullptr;
mTarget = nullptr;
}
CanonicalBrowsingContext::PendingRemotenessChange::PendingRemotenessChange(
CanonicalBrowsingContext* aTarget, RemotenessPromise::Private* aPromise,
uint64_t aPendingSwitchId, const NavigationIsolationOptions& aOptions)
: mTarget(aTarget),
mPromise(aPromise),
mPendingSwitchId(aPendingSwitchId),
mOptions(aOptions) {}
CanonicalBrowsingContext::PendingRemotenessChange::~PendingRemotenessChange() {
MOZ_ASSERT(
!mPromise && !mTarget && !mContentParentKeepAlive && !mSpecificGroup,
"should've already been Cancel() or Complete()-ed");
}
BrowserParent* CanonicalBrowsingContext::GetBrowserParent() const {
return mCurrentBrowserParent;
}
void CanonicalBrowsingContext::SetCurrentBrowserParent(
BrowserParent* aBrowserParent) {
MOZ_DIAGNOSTIC_ASSERT(!mCurrentBrowserParent || !aBrowserParent,
"BrowsingContext already has a current BrowserParent!");
MOZ_DIAGNOSTIC_ASSERT_IF(aBrowserParent, aBrowserParent->CanSend());
MOZ_DIAGNOSTIC_ASSERT_IF(aBrowserParent,
aBrowserParent->Manager()->ChildID() == mProcessId);
// BrowserParent must either be directly for this BrowsingContext, or the
// manager out our embedder WindowGlobal.
MOZ_DIAGNOSTIC_ASSERT_IF(
aBrowserParent && aBrowserParent->GetBrowsingContext() != this,
GetParentWindowContext() &&
GetParentWindowContext()->Manager() == aBrowserParent);
if (aBrowserParent && IsTopContent() && !ManuallyManagesActiveness()) {
aBrowserParent->SetRenderLayers(IsActive());
}
mCurrentBrowserParent = aBrowserParent;
}
bool CanonicalBrowsingContext::ManuallyManagesActiveness() const {
auto* el = GetEmbedderElement();
return el && el->IsXULElement() && el->HasAttr(nsGkAtoms::manualactiveness);
}
RefPtr<CanonicalBrowsingContext::RemotenessPromise>
CanonicalBrowsingContext::ChangeRemoteness(
const NavigationIsolationOptions& aOptions, uint64_t aPendingSwitchId) {
MOZ_DIAGNOSTIC_ASSERT(IsContent(),
"cannot change the process of chrome contexts");
MOZ_DIAGNOSTIC_ASSERT(
IsTop() == IsEmbeddedInProcess(0),
"toplevel content must be embedded in the parent process");
MOZ_DIAGNOSTIC_ASSERT(!aOptions.mReplaceBrowsingContext || IsTop(),
"Cannot replace BrowsingContext for subframes");
MOZ_DIAGNOSTIC_ASSERT(
aOptions.mSpecificGroupId == 0 || aOptions.mReplaceBrowsingContext,
"Cannot specify group ID unless replacing BC");
MOZ_DIAGNOSTIC_ASSERT(aPendingSwitchId || !IsTop(),
"Should always have aPendingSwitchId for top-level "
"frames");
if (!AncestorsAreCurrent()) {
NS_WARNING("An ancestor context is no longer current");
return RemotenessPromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
}
// Ensure our embedder hasn't been destroyed or asked to shutdown already.
RefPtr<WindowGlobalParent> embedderWindowGlobal = GetEmbedderWindowGlobal();
if (!embedderWindowGlobal) {
NS_WARNING("Non-embedded BrowsingContext");
return RemotenessPromise::CreateAndReject(NS_ERROR_UNEXPECTED, __func__);
}
if (!embedderWindowGlobal->CanSend()) {
NS_WARNING("Embedder already been destroyed.");
return RemotenessPromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE, __func__);
}
RefPtr<BrowserParent> embedderBrowser =
embedderWindowGlobal->GetBrowserParent();
if (embedderBrowser && embedderBrowser->Manager()->IsShuttingDown()) {
NS_WARNING("Embedder already asked to shutdown.");
return RemotenessPromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE, __func__);
}
if (aOptions.mRemoteType.IsEmpty() && (!IsTop() || !GetEmbedderElement())) {
NS_WARNING("Cannot load non-remote subframes");
return RemotenessPromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
}
// Cancel ongoing remoteness changes.
if (mPendingRemotenessChange) {
mPendingRemotenessChange->Cancel(NS_ERROR_ABORT);
MOZ_DIAGNOSTIC_ASSERT(!mPendingRemotenessChange, "Should have cleared");
}
auto promise = MakeRefPtr<RemotenessPromise::Private>(__func__);
promise->UseDirectTaskDispatch(__func__);
RefPtr<PendingRemotenessChange> change =
new PendingRemotenessChange(this, promise, aPendingSwitchId, aOptions);
mPendingRemotenessChange = change;
// If we're replacing BrowsingContext, determine which BrowsingContextGroup
// we'll switch into, taking into account load options.
if (aOptions.mReplaceBrowsingContext) {
change->mSpecificGroup =
aOptions.mSpecificGroupId
? BrowsingContextGroup::GetOrCreate(aOptions.mSpecificGroupId)
: BrowsingContextGroup::Create(aOptions.mShouldCrossOriginIsolate);
change->mSpecificGroup->AddKeepAlive();
}
// Call `prepareToChangeRemoteness` in parallel with starting a new process
// for <browser> loads.
if (IsTop() && GetEmbedderElement()) {
nsCOMPtr<nsIBrowser> browser = GetEmbedderElement()->AsBrowser();
if (!browser) {
change->Cancel(NS_ERROR_FAILURE);
return promise.forget();
}
RefPtr<Promise> blocker;
nsresult rv = browser->PrepareToChangeRemoteness(getter_AddRefs(blocker));
if (NS_FAILED(rv)) {
change->Cancel(rv);
return promise.forget();
}
// Mark prepareToChange as unresolved, and wait for it to become resolved.
if (blocker && blocker->State() != Promise::PromiseState::Resolved) {
change->mWaitingForPrepareToChange = true;
blocker->AddCallbacksWithCycleCollectedArgs(
[change](JSContext*, JS::Handle<JS::Value>, ErrorResult&)
MOZ_CAN_RUN_SCRIPT_BOUNDARY_LAMBDA {
change->mWaitingForPrepareToChange = false;
change->MaybeFinish();
},
[change](JSContext*, JS::Handle<JS::Value> aValue, ErrorResult&) {
change->Cancel(
Promise::TryExtractNSResultFromRejectionValue(aValue));
});
}
}
// Switching a subframe to be local within it's embedding process.
if (embedderBrowser &&
aOptions.mRemoteType == embedderBrowser->Manager()->GetRemoteType()) {
MOZ_DIAGNOSTIC_ASSERT(
aPendingSwitchId,
"We always have a PendingSwitchId, except for print-preview loads, "
"which will never perform a process-switch to being in-process with "
"their embedder");
MOZ_DIAGNOSTIC_ASSERT(!aOptions.mReplaceBrowsingContext);
MOZ_DIAGNOSTIC_ASSERT(!aOptions.mRemoteType.IsEmpty());
MOZ_DIAGNOSTIC_ASSERT(!change->mWaitingForPrepareToChange);
MOZ_DIAGNOSTIC_ASSERT(!change->mSpecificGroup);
// Switching to local, so we don't need to create a new process, and will
// instead use our embedder process.
change->mContentParentKeepAlive =
embedderBrowser->Manager()->AddKeepAlive(BrowserId());
change->ProcessLaunched();
return promise.forget();
}
// Switching to the parent process.
if (aOptions.mRemoteType.IsEmpty()) {
change->ProcessLaunched();
return promise.forget();
}
// If we're aiming to end up in a new process of the same type as our old
// process, and then putting our previous document in the BFCache, try to stay
// in the same process to avoid creating new processes unnecessarily.
RefPtr<ContentParent> existingProcess = GetContentParent();
if (existingProcess && !existingProcess->IsShuttingDown() &&
aOptions.mReplaceBrowsingContext &&
aOptions.mRemoteType == existingProcess->GetRemoteType()) {
change->mContentParentKeepAlive =
existingProcess->AddKeepAlive(BrowserId());
change->ProcessLaunched();
return promise.forget();
}
// Try to predict which BrowsingContextGroup will be used for the final load
// in this BrowsingContext. This has to be accurate if switching into an
// existing group, as it will control what pool of processes will be used
// for process selection.
//
// It's _technically_ OK to provide a group here if we're actually going to
// switch into a brand new group, though it's sub-optimal, as it can
// restrict the set of processes we're using.
BrowsingContextGroup* finalGroup =
aOptions.mReplaceBrowsingContext ? change->mSpecificGroup.get() : Group();
bool preferUsed =
StaticPrefs::browser_tabs_remote_subframesPreferUsed() && !IsTop();
change->mContentParentKeepAlive =
ContentParent::GetNewOrUsedLaunchingBrowserProcess(
/* aRemoteType = */ aOptions.mRemoteType,
/* aGroup = */ finalGroup,
/* aPriority = */ hal::PROCESS_PRIORITY_FOREGROUND,
/* aPreferUsed = */ preferUsed,
/* aBrowserId */ BrowserId());
if (!change->mContentParentKeepAlive) {
change->Cancel(NS_ERROR_FAILURE);
return promise.forget();
}
if (change->mContentParentKeepAlive->IsLaunching()) {
change->mContentParentKeepAlive
->WaitForLaunchAsync(/* aPriority */ hal::PROCESS_PRIORITY_FOREGROUND,
/* aBrowserId */ BrowserId())
->Then(
GetMainThreadSerialEventTarget(), __func__,
[change](UniqueContentParentKeepAlive)
MOZ_CAN_RUN_SCRIPT_BOUNDARY_LAMBDA {
change->ProcessLaunched();
},
[change]() { change->Cancel(NS_ERROR_FAILURE); });
} else {
change->ProcessLaunched();
}
return promise.forget();
}
void CanonicalBrowsingContext::MaybeSetPermanentKey(Element* aEmbedder) {
MOZ_DIAGNOSTIC_ASSERT(IsTop());
if (aEmbedder) {
if (nsCOMPtr<nsIBrowser> browser = aEmbedder->AsBrowser()) {
JS::Rooted<JS::Value> key(RootingCx());
if (NS_SUCCEEDED(browser->GetPermanentKey(&key)) && key.isObject()) {
mPermanentKey = key;
}
}
}
}
MediaController* CanonicalBrowsingContext::GetMediaController() {
// We would only create one media controller per tab, so accessing the
// controller via the top-level browsing context.
if (GetParent()) {
return Cast(Top())->GetMediaController();
}
MOZ_ASSERT(!GetParent(),
"Must access the controller from the top-level browsing context!");
// Only content browsing context can create media controller, we won't create
// controller for chrome document, such as the browser UI.
if (!mTabMediaController && !IsDiscarded() && IsContent()) {
mTabMediaController = new MediaController(Id());
}
return mTabMediaController;
}
bool CanonicalBrowsingContext::HasCreatedMediaController() const {
return !!mTabMediaController;
}
bool CanonicalBrowsingContext::SupportsLoadingInParent(
nsDocShellLoadState* aLoadState, uint64_t* aOuterWindowId) {
// We currently don't support initiating loads in the parent when they are
// watched by devtools. This is because devtools tracks loads using content
// process notifications, which happens after the load is initiated in this
// case. Devtools clears all prior requests when it detects a new navigation,
// so it drops the main document load that happened here.
if (WatchedByDevTools()) {
return false;
}
// Session-history-in-parent implementation relies currently on getting a
// round trip through a child process.
if (aLoadState->LoadIsFromSessionHistory()) {
return false;
}
// DocumentChannel currently only supports connecting channels into the
// content process, so we can only support schemes that will always be loaded
// there for now. Restrict to just http(s) for simplicity.
if (!net::SchemeIsHttpOrHttps(aLoadState->URI())) {
return false;
}
if (WindowGlobalParent* global = GetCurrentWindowGlobal()) {
nsCOMPtr<nsIURI> currentURI = global->GetDocumentURI();
if (currentURI) {
nsCOMPtr<nsIURI> uri = aLoadState->URI();
bool newURIHasRef = false;
uri->GetHasRef(&newURIHasRef);
bool equalsExceptRef = false;
uri->EqualsExceptRef(currentURI, &equalsExceptRef);
if (equalsExceptRef && newURIHasRef) {
// This navigation is same-doc WRT the current one, we should pass it
// down to the docshell to be handled.
return false;
}
}
// If unloading the current document will cause a beforeunload listener to
// run, then we need to start the load in that process after we fire the
// event.
if (PreOrderWalkFlag([&](BrowsingContext* aBC) {
WindowContext* wc = aBC->GetCurrentWindowContext();
if (wc && wc->NeedsBeforeUnload()) {
// We can stop as soon as we know at least one beforeunload listener
// exists.
return WalkFlag::Stop;
}
return WalkFlag::Next;
}) == WalkFlag::Stop) {
return false;
}
*aOuterWindowId = global->OuterWindowId();
}
return true;
}
bool CanonicalBrowsingContext::LoadInParent(nsDocShellLoadState* aLoadState,
bool aSetNavigating) {
// We currently only support starting loads directly from the
// CanonicalBrowsingContext for top-level BCs.
// We currently only support starting loads directly from the
// CanonicalBrowsingContext for top-level BCs.
if (!IsTopContent() || !GetContentParent() ||
!StaticPrefs::browser_tabs_documentchannel_parent_controlled()) {
return false;
}
uint64_t outerWindowId = 0;
if (!SupportsLoadingInParent(aLoadState, &outerWindowId)) {
return false;
}
MOZ_ASSERT(!aLoadState->URI()->SchemeIs("javascript"));
MOZ_ALWAYS_SUCCEEDS(
SetParentInitiatedNavigationEpoch(++gParentInitiatedNavigationEpoch));
// Note: If successful, this will recurse into StartDocumentLoad and
// set mCurrentLoad to the DocumentLoadListener instance created.
// Ideally in the future we will only start loads from here, and we can
// just set this directly instead.
return net::DocumentLoadListener::LoadInParent(this, aLoadState,
aSetNavigating);
}
bool CanonicalBrowsingContext::AttemptSpeculativeLoadInParent(
nsDocShellLoadState* aLoadState) {
// We currently only support starting loads directly from the
// CanonicalBrowsingContext for top-level BCs.
// We currently only support starting loads directly from the
// CanonicalBrowsingContext for top-level BCs.
if (!IsTopContent() || !GetContentParent() ||
(StaticPrefs::browser_tabs_documentchannel_parent_controlled())) {
return false;
}
uint64_t outerWindowId = 0;
if (!SupportsLoadingInParent(aLoadState, &outerWindowId)) {
return false;
}
// If we successfully open the DocumentChannel, then it'll register
// itself using aLoadIdentifier and be kept alive until it completes
// loading.
return net::DocumentLoadListener::SpeculativeLoadInParent(this, aLoadState);
}
bool CanonicalBrowsingContext::StartDocumentLoad(
net::DocumentLoadListener* aLoad) {
// If we're controlling loads from the parent, then starting a new load means
// that we need to cancel any existing ones.
if (StaticPrefs::browser_tabs_documentchannel_parent_controlled() &&
mCurrentLoad) {
// Make sure we are not loading a javascript URI.
MOZ_ASSERT(!aLoad->IsLoadingJSURI());
// If we want to do a download, don't cancel the current navigation.
if (!aLoad->IsDownload()) {
mCurrentLoad->Cancel(NS_BINDING_CANCELLED_OLD_LOAD, ""_ns);
}
}
mCurrentLoad = aLoad;
if (NS_FAILED(SetCurrentLoadIdentifier(Some(aLoad->GetLoadIdentifier())))) {
mCurrentLoad = nullptr;
return false;
}
return true;
}
void CanonicalBrowsingContext::EndDocumentLoad(bool aContinueNavigating) {
mCurrentLoad = nullptr;
if (!aContinueNavigating) {
// Resetting the current load identifier on a discarded context
// has no effect when a document load has finished.
Unused << SetCurrentLoadIdentifier(Nothing());
}
}
already_AddRefed<nsIURI> CanonicalBrowsingContext::GetCurrentURI() const {
nsCOMPtr<nsIURI> currentURI;
if (nsIDocShell* docShell = GetDocShell()) {
MOZ_ALWAYS_SUCCEEDS(
nsDocShell::Cast(docShell)->GetCurrentURI(getter_AddRefs(currentURI)));
} else {
currentURI = mCurrentRemoteURI;
}
return currentURI.forget();
}
void CanonicalBrowsingContext::SetCurrentRemoteURI(nsIURI* aCurrentRemoteURI) {
MOZ_ASSERT(!GetDocShell());
mCurrentRemoteURI = aCurrentRemoteURI;
}
void CanonicalBrowsingContext::ResetSHEntryHasUserInteractionCache() {
WindowContext* topWc = GetTopWindowContext();
if (topWc && !topWc->IsDiscarded()) {
MOZ_ALWAYS_SUCCEEDS(topWc->SetSHEntryHasUserInteraction(false));
}
}
void CanonicalBrowsingContext::HistoryCommitIndexAndLength() {
nsID changeID = {};
CallerWillNotifyHistoryIndexAndLengthChanges caller(nullptr);
HistoryCommitIndexAndLength(changeID, caller);
}
void CanonicalBrowsingContext::HistoryCommitIndexAndLength(
const nsID& aChangeID,
const CallerWillNotifyHistoryIndexAndLengthChanges& aProofOfCaller) {
if (!IsTop()) {
Cast(Top())->HistoryCommitIndexAndLength(aChangeID, aProofOfCaller);
return;
}
nsISHistory* shistory = GetSessionHistory();
if (!shistory) {
return;
}
int32_t index = 0;
shistory->GetIndex(&index);
int32_t length = shistory->GetCount();
GetChildSessionHistory()->SetIndexAndLength(index, length, aChangeID);
shistory->EvictOutOfRangeDocumentViewers(index);
Group()->EachParent([&](ContentParent* aParent) {
Unused << aParent->SendHistoryCommitIndexAndLength(this, index, length,
aChangeID);
});
}
void CanonicalBrowsingContext::SynchronizeLayoutHistoryState() {
if (mActiveEntry) {
if (IsInProcess()) {
nsIDocShell* docShell = GetDocShell();
if (docShell) {
docShell->PersistLayoutHistoryState();
nsCOMPtr<nsILayoutHistoryState> state;
docShell->GetLayoutHistoryState(getter_AddRefs(state));
if (state) {
mActiveEntry->SetLayoutHistoryState(state);
}
}
} else if (ContentParent* cp = GetContentParent()) {
cp->SendGetLayoutHistoryState(this)->Then(
GetCurrentSerialEventTarget(), __func__,
[activeEntry = mActiveEntry](
const std::tuple<RefPtr<nsILayoutHistoryState>, Maybe<Wireframe>>&
aResult) {
if (std::get<0>(aResult)) {
activeEntry->SetLayoutHistoryState(std::get<0>(aResult));
}
if (std::get<1>(aResult)) {
activeEntry->SetWireframe(std::get<1>(aResult));
}
},
[]() {});
}
}
}
void CanonicalBrowsingContext::ResetScalingZoom() {
// This currently only ever gets called in the parent process, and we
// pass the message on to the WindowGlobalChild for the rootmost browsing
// context.
if (WindowGlobalParent* topWindow = GetTopWindowContext()) {
Unused << topWindow->SendResetScalingZoom();
}
}
void CanonicalBrowsingContext::SetRestoreData(SessionStoreRestoreData* aData,
ErrorResult& aError) {
MOZ_DIAGNOSTIC_ASSERT(aData);
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetParentObject());
RefPtr<Promise> promise = Promise::Create(global, aError);
if (aError.Failed()) {
return;
}
if (NS_WARN_IF(NS_FAILED(SetHasRestoreData(true)))) {
aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
mRestoreState = new RestoreState();
mRestoreState->mData = aData;
mRestoreState->mPromise = promise;
}
already_AddRefed<Promise> CanonicalBrowsingContext::GetRestorePromise() {
if (mRestoreState) {
return do_AddRef(mRestoreState->mPromise);
}
return nullptr;
}
void CanonicalBrowsingContext::ClearRestoreState() {
if (IsDiscarded()) {
return;
}
if (!mRestoreState) {
MOZ_DIAGNOSTIC_ASSERT(!GetHasRestoreData());
return;
}
if (mRestoreState->mPromise) {
mRestoreState->mPromise->MaybeRejectWithUndefined();
}
mRestoreState = nullptr;
MOZ_ALWAYS_SUCCEEDS(SetHasRestoreData(false));
}
void CanonicalBrowsingContext::RequestRestoreTabContent(
WindowGlobalParent* aWindow) {
MOZ_DIAGNOSTIC_ASSERT(IsTop());
if (IsDiscarded() || !mRestoreState || !mRestoreState->mData) {
return;
}
CanonicalBrowsingContext* context = aWindow->GetBrowsingContext();
MOZ_DIAGNOSTIC_ASSERT(!context->IsDiscarded());
RefPtr<SessionStoreRestoreData> data =
mRestoreState->mData->FindDataForChild(context);
if (context->IsTop()) {
MOZ_DIAGNOSTIC_ASSERT(context == this);
// We need to wait until the appropriate load event has fired before we
// can "complete" the restore process, so if we're holding an empty data
// object, just resolve the promise immediately.
if (mRestoreState->mData->IsEmpty()) {
MOZ_DIAGNOSTIC_ASSERT(!data || data->IsEmpty());
mRestoreState->Resolve();
ClearRestoreState();
return;
}
// Since we're following load event order, we'll only arrive here for a
// toplevel context after we've already sent down data for all child frames,
// so it's safe to clear this reference now. The completion callback below
// relies on the mData field being null to determine if all requests have
// been sent out.
mRestoreState->ClearData();
MOZ_ALWAYS_SUCCEEDS(SetHasRestoreData(false));
}
if (data && !data->IsEmpty()) {
auto onTabRestoreComplete = [self = RefPtr{this},
state = RefPtr{mRestoreState}](auto) {
state->mResolves++;
if (!state->mData && state->mRequests == state->mResolves) {
state->Resolve();
if (state == self->mRestoreState) {
self->ClearRestoreState();
}
}
};
mRestoreState->mRequests++;
if (data->CanRestoreInto(aWindow->GetDocumentURI())) {
if (!aWindow->IsInProcess()) {
aWindow->SendRestoreTabContent(WrapNotNull(data.get()),
onTabRestoreComplete,
onTabRestoreComplete);
return;
}
data->RestoreInto(context);
}
// This must be called both when we're doing an in-process restore, and when
// we didn't do a restore at all due to a URL mismatch.
onTabRestoreComplete(true);
}
}
void CanonicalBrowsingContext::RestoreState::Resolve() {
MOZ_DIAGNOSTIC_ASSERT(mPromise);
mPromise->MaybeResolveWithUndefined();
mPromise = nullptr;
}
nsresult CanonicalBrowsingContext::WriteSessionStorageToSessionStore(
const nsTArray<SSCacheCopy>& aSesssionStorage, uint32_t aEpoch) {
nsCOMPtr<nsISessionStoreFunctions> sessionStoreFuncs =
do_GetService("@mozilla.org/toolkit/sessionstore-functions;1");
if (!sessionStoreFuncs) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIXPConnectWrappedJS> wrapped =
do_QueryInterface(sessionStoreFuncs);
AutoJSAPI jsapi;
if (!jsapi.Init(wrapped->GetJSObjectGlobal())) {
return NS_ERROR_FAILURE;
}
JS::Rooted<JS::Value> key(jsapi.cx(), Top()->PermanentKey());
Record<nsCString, Record<nsString, nsString>> storage;
JS::Rooted<JS::Value> update(jsapi.cx());
if (!aSesssionStorage.IsEmpty()) {
SessionStoreUtils::ConstructSessionStorageValues(this, aSesssionStorage,
storage);
if (!ToJSValue(jsapi.cx(), storage, &update)) {
return NS_ERROR_FAILURE;
}
} else {
update.setNull();
}
return sessionStoreFuncs->UpdateSessionStoreForStorage(
Top()->GetEmbedderElement(), this, key, aEpoch, update);
}
void CanonicalBrowsingContext::UpdateSessionStoreSessionStorage(
const std::function<void()>& aDone) {
using DataPromise = BackgroundSessionStorageManager::DataPromise;
BackgroundSessionStorageManager::GetData(
this, StaticPrefs::browser_sessionstore_dom_storage_limit(),
/* aClearSessionStoreTimer = */ true)
->Then(GetCurrentSerialEventTarget(), __func__,
[self = RefPtr{this}, aDone, epoch = GetSessionStoreEpoch()](
const DataPromise::ResolveOrRejectValue& valueList) {
if (valueList.IsResolve()) {
self->WriteSessionStorageToSessionStore(
valueList.ResolveValue(), epoch);
}
aDone();
});
}
/* static */
void CanonicalBrowsingContext::UpdateSessionStoreForStorage(
uint64_t aBrowsingContextId) {
RefPtr<CanonicalBrowsingContext> browsingContext = Get(aBrowsingContextId);
if (!browsingContext) {
return;
}
browsingContext->UpdateSessionStoreSessionStorage([]() {});
}
void CanonicalBrowsingContext::MaybeScheduleSessionStoreUpdate() {
if (!SessionStorePlatformCollection()) {
return;
}
if (!IsTop()) {
Top()->MaybeScheduleSessionStoreUpdate();
return;
}
if (IsInBFCache()) {
return;
}
if (mSessionStoreSessionStorageUpdateTimer) {
return;
}
if (!StaticPrefs::browser_sessionstore_debug_no_auto_updates()) {
auto result = NS_NewTimerWithFuncCallback(
[](nsITimer*, void* aClosure) {
auto* context = static_cast<CanonicalBrowsingContext*>(aClosure);
context->UpdateSessionStoreSessionStorage([]() {});
},
this, StaticPrefs::browser_sessionstore_interval(),
nsITimer::TYPE_ONE_SHOT,
"CanonicalBrowsingContext::MaybeScheduleSessionStoreUpdate");
if (result.isErr()) {
return;
}
mSessionStoreSessionStorageUpdateTimer = result.unwrap();
}
}
void CanonicalBrowsingContext::CancelSessionStoreUpdate() {
if (mSessionStoreSessionStorageUpdateTimer) {
mSessionStoreSessionStorageUpdateTimer->Cancel();
mSessionStoreSessionStorageUpdateTimer = nullptr;
}
}
void CanonicalBrowsingContext::SetContainerFeaturePolicy(
Maybe<FeaturePolicyInfo>&& aContainerFeaturePolicyInfo) {
mContainerFeaturePolicyInfo = std::move(aContainerFeaturePolicyInfo);
}
already_AddRefed<CanonicalBrowsingContext>
CanonicalBrowsingContext::GetCrossGroupOpener() const {
return Get(mCrossGroupOpenerId);
}
void CanonicalBrowsingContext::SetCrossGroupOpenerId(uint64_t aOpenerId) {
MOZ_DIAGNOSTIC_ASSERT(IsTopContent());
MOZ_DIAGNOSTIC_ASSERT(mCrossGroupOpenerId == 0,
"Can only set CrossGroupOpenerId once");
mCrossGroupOpenerId = aOpenerId;
}
void CanonicalBrowsingContext::SetCrossGroupOpener(
CanonicalBrowsingContext* aCrossGroupOpener, ErrorResult& aRv) {
if (!IsTopContent()) {
aRv.ThrowNotAllowedError(
"Can only set crossGroupOpener on toplevel content");
return;
}
if (mCrossGroupOpenerId != 0) {
aRv.ThrowNotAllowedError("Can only set crossGroupOpener once");
return;
}
if (!aCrossGroupOpener) {
aRv.ThrowNotAllowedError("Can't set crossGroupOpener to null");
return;
}
SetCrossGroupOpenerId(aCrossGroupOpener->Id());
}
auto CanonicalBrowsingContext::FindUnloadingHost(uint64_t aChildID)
-> nsTArray<UnloadingHost>::iterator {
return std::find_if(
mUnloadingHosts.begin(), mUnloadingHosts.end(),
[&](const auto& host) { return host.mChildID == aChildID; });
}
void CanonicalBrowsingContext::ClearUnloadingHost(uint64_t aChildID) {
// Notify any callbacks which were waiting for the host to finish unloading
// that it has.
auto found = FindUnloadingHost(aChildID);
if (found != mUnloadingHosts.end()) {
auto callbacks = std::move(found->mCallbacks);
mUnloadingHosts.RemoveElementAt(found);
for (const auto& callback : callbacks) {
callback();
}
}
}
void CanonicalBrowsingContext::StartUnloadingHost(uint64_t aChildID) {
MOZ_DIAGNOSTIC_ASSERT(FindUnloadingHost(aChildID) == mUnloadingHosts.end());
mUnloadingHosts.AppendElement(UnloadingHost{aChildID, {}});
}
void CanonicalBrowsingContext::BrowserParentDestroyed(
BrowserParent* aBrowserParent, bool aAbnormalShutdown) {
ClearUnloadingHost(aBrowserParent->Manager()->ChildID());
// Handling specific to when the current BrowserParent has been destroyed.
if (mCurrentBrowserParent == aBrowserParent) {
mCurrentBrowserParent = nullptr;
// If this BrowserParent is for a subframe, attempt to recover from a
// subframe crash by rendering the subframe crashed page in the embedding
// content.
if (aAbnormalShutdown) {
ShowSubframeCrashedUI(aBrowserParent->GetBrowserBridgeParent());
}
}
}
void CanonicalBrowsingContext::ShowSubframeCrashedUI(
BrowserBridgeParent* aBridge) {
if (!aBridge || IsDiscarded() || !aBridge->CanSend()) {
return;
}
MOZ_DIAGNOSTIC_ASSERT(!aBridge->GetBrowsingContext() ||
aBridge->GetBrowsingContext() == this);
// There is no longer a current inner window within this
// BrowsingContext, update the `CurrentInnerWindowId` field to reflect
// this.
MOZ_ALWAYS_SUCCEEDS(SetCurrentInnerWindowId(0));
// The owning process will now be the embedder to render the subframe
// crashed page, switch ownership back over.
SetOwnerProcessId(aBridge->Manager()->Manager()->ChildID());
SetCurrentBrowserParent(aBridge->Manager());
Unused << aBridge->SendSubFrameCrashed();
}
static void LogBFCacheBlockingForDoc(BrowsingContext* aBrowsingContext,
uint32_t aBFCacheCombo, bool aIsSubDoc) {
if (aIsSubDoc) {
nsAutoCString uri("[no uri]");
nsCOMPtr<nsIURI> currentURI =
aBrowsingContext->Canonical()->GetCurrentURI();
if (currentURI) {
uri = currentURI->GetSpecOrDefault();
}
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug,
(" ** Blocked for document %s", uri.get()));
}
if (aBFCacheCombo & BFCacheStatus::EVENT_HANDLING_SUPPRESSED) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug,
(" * event handling suppression"));
}
if (aBFCacheCombo & BFCacheStatus::SUSPENDED) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * suspended Window"));
}
if (aBFCacheCombo & BFCacheStatus::UNLOAD_LISTENER) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * unload listener"));
}
if (aBFCacheCombo & BFCacheStatus::REQUEST) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * requests in the loadgroup"));
}
if (aBFCacheCombo & BFCacheStatus::ACTIVE_GET_USER_MEDIA) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * GetUserMedia"));
}
if (aBFCacheCombo & BFCacheStatus::ACTIVE_PEER_CONNECTION) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * PeerConnection"));
}
if (aBFCacheCombo & BFCacheStatus::CONTAINS_EME_CONTENT) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * EME content"));
}
if (aBFCacheCombo & BFCacheStatus::CONTAINS_MSE_CONTENT) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * MSE use"));
}
if (aBFCacheCombo & BFCacheStatus::HAS_ACTIVE_SPEECH_SYNTHESIS) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * Speech use"));
}
if (aBFCacheCombo & BFCacheStatus::HAS_USED_VR) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * used VR"));
}
if (aBFCacheCombo & BFCacheStatus::BEFOREUNLOAD_LISTENER) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * beforeunload listener"));
}
if (aBFCacheCombo & BFCacheStatus::ACTIVE_LOCK) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * has active Web Locks"));
}
if (aBFCacheCombo & BFCacheStatus::PAGE_LOADING) {
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * has page loading"));
}
}
bool CanonicalBrowsingContext::AllowedInBFCache(
const Maybe<uint64_t>& aChannelId, nsIURI* aNewURI) {
if (MOZ_UNLIKELY(MOZ_LOG_TEST(gSHIPBFCacheLog, LogLevel::Debug))) {
nsAutoCString uri("[no uri]");
nsCOMPtr<nsIURI> currentURI = GetCurrentURI();
if (currentURI) {
uri = currentURI->GetSpecOrDefault();
}
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, ("Checking %s", uri.get()));
}
if (IsInProcess()) {
return false;
}
uint32_t bfcacheCombo = 0;
if (mRestoreState) {
bfcacheCombo |= BFCacheStatus::RESTORING;
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * during session restore"));
}
if (Group()->Toplevels().Length() > 1) {
bfcacheCombo |= BFCacheStatus::NOT_ONLY_TOPLEVEL_IN_BCG;
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug,
(" * auxiliary BrowsingContexts"));
}
// There are not a lot of about:* pages that are allowed to load in
// subframes, so it's OK to allow those few about:* pages enter BFCache.
MOZ_ASSERT(IsTop(), "Trying to put a non top level BC into BFCache");
WindowGlobalParent* wgp = GetCurrentWindowGlobal();
if (wgp && wgp->GetDocumentURI()) {
nsCOMPtr<nsIURI> currentURI = wgp->GetDocumentURI();
// Exempt about:* pages from bfcache, with the exception of about:blank
if (currentURI->SchemeIs("about") &&
!NS_IsAboutBlankAllowQueryAndFragment(currentURI)) {
bfcacheCombo |= BFCacheStatus::ABOUT_PAGE;
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug, (" * about:* page"));
}
if (aNewURI) {
bool equalUri = false;
aNewURI->Equals(currentURI, &equalUri);
if (equalUri) {
// When loading the same uri, disable bfcache so that
// nsDocShell::OnNewURI transforms the load to LOAD_NORMAL_REPLACE.
return false;
}
}
}
// For telemetry we're collecting all the flags for all the BCs hanging
// from this top-level BC.
PreOrderWalk([&](BrowsingContext* aBrowsingContext) {
WindowGlobalParent* wgp =
aBrowsingContext->Canonical()->GetCurrentWindowGlobal();
uint32_t subDocBFCacheCombo = wgp ? wgp->GetBFCacheStatus() : 0;
if (wgp) {
const Maybe<uint64_t>& singleChannelId = wgp->GetSingleChannelId();
if (singleChannelId.isSome()) {
if (singleChannelId.value() == 0 || aChannelId.isNothing() ||
singleChannelId.value() != aChannelId.value()) {
subDocBFCacheCombo |= BFCacheStatus::REQUEST;
}
}
}
if (MOZ_UNLIKELY(MOZ_LOG_TEST(gSHIPBFCacheLog, LogLevel::Debug))) {
LogBFCacheBlockingForDoc(aBrowsingContext, subDocBFCacheCombo,
aBrowsingContext != this);
}
bfcacheCombo |= subDocBFCacheCombo;
});
nsDocShell::ReportBFCacheComboTelemetry(bfcacheCombo);
if (MOZ_UNLIKELY(MOZ_LOG_TEST(gSHIPBFCacheLog, LogLevel::Debug))) {
nsAutoCString uri("[no uri]");
nsCOMPtr<nsIURI> currentURI = GetCurrentURI();
if (currentURI) {
uri = currentURI->GetSpecOrDefault();
}
MOZ_LOG(gSHIPBFCacheLog, LogLevel::Debug,
(" +> %s %s be blocked from going into the BFCache", uri.get(),
bfcacheCombo == 0 ? "shouldn't" : "should"));
}
if (StaticPrefs::docshell_shistory_bfcache_allow_unload_listeners()) {
bfcacheCombo &= ~BFCacheStatus::UNLOAD_LISTENER;
}
return bfcacheCombo == 0;
}
struct ClearSiteWalkHistoryData {
nsIPrincipal* mPrincipal = nullptr;
bool mShouldClear = false;
};
// static
nsresult CanonicalBrowsingContext::ContainsSameOriginBfcacheEntry(
nsISHEntry* aEntry, mozilla::dom::BrowsingContext* aBC, int32_t aChildIndex,
void* aData) {
if (!aEntry) {
return NS_OK;
}
nsCOMPtr<nsIPrincipal> entryPrincipal;
nsresult rv =
aEntry->GetPartitionedPrincipalToInherit(getter_AddRefs(entryPrincipal));
if (NS_FAILED(rv) || !entryPrincipal) {
return NS_OK;
}
ClearSiteWalkHistoryData* data =
static_cast<ClearSiteWalkHistoryData*>(aData);
if (data->mPrincipal->OriginAttributesRef() ==
entryPrincipal->OriginAttributesRef()) {
nsCOMPtr<nsIURI> entryURI = aEntry->GetURI();
if (data->mPrincipal->IsSameOrigin(entryURI)) {
data->mShouldClear = true;
} else {
nsSHistory::WalkHistoryEntries(aEntry, aBC,
ContainsSameOriginBfcacheEntry, aData);
}
}
return NS_OK;
}
// static
nsresult CanonicalBrowsingContext::ClearBfcacheByPrincipal(
nsIPrincipal* aPrincipal) {
NS_ENSURE_ARG_POINTER(aPrincipal);
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
// Allow disabling the feature if unexpected regressions occur
if (!StaticPrefs::privacy_clearSiteDataHeader_cache_bfcache_enabled()) {
return NS_OK;
}
// Iter through all open tabs by going through all top-level browsing
// contexts.
AutoTArray<RefPtr<BrowsingContextGroup>, 32> groups;
BrowsingContextGroup::GetAllGroups(groups);
for (auto& browsingContextGroup : groups) {
for (auto& topLevel : browsingContextGroup->Toplevels()) {
if (topLevel->IsDiscarded()) {
continue;
}
auto* bc = topLevel->Canonical();
nsSHistory* sh = static_cast<nsSHistory*>(bc->GetSessionHistory());
if (!sh) {
continue;
}
AutoTArray<nsCOMPtr<nsISHEntry>, 4> entriesToDelete;
// We only need to traverse all top-level history items due to bfcache
// only caching top level sites and partitioning origins. If an iframe has
// the same origin, we only want to clear it, if the top level has the
// same origin.
for (nsCOMPtr<nsISHEntry>& entry : sh->Entries()) {
// Determine whether this history entry matches the origin, or contains
// an iframe with that origin
ClearSiteWalkHistoryData data;
data.mPrincipal = aPrincipal;
CanonicalBrowsingContext::ContainsSameOriginBfcacheEntry(entry, nullptr,
0, &data);
if (data.mShouldClear) {
entriesToDelete.AppendElement(entry);
}
}
for (nsCOMPtr<nsISHEntry>& entry : entriesToDelete) {
sh->EvictDocumentViewerForEntry(entry);
}
}
}
return NS_OK;
}
void CanonicalBrowsingContext::SetIsActive(bool aIsActive, ErrorResult& aRv) {
#ifdef DEBUG
if (MOZ_UNLIKELY(!ManuallyManagesActiveness())) {
xpc_DumpJSStack(true, true, false);
MOZ_ASSERT_UNREACHABLE(
"Trying to manually manage activeness of a browsing context that isn't "
"manually managed (see manualactiveness attribute)");
}
#endif
SetIsActiveInternal(aIsActive, aRv);
}
void CanonicalBrowsingContext::SetTouchEventsOverride(
dom::TouchEventsOverride aOverride, ErrorResult& aRv) {
SetTouchEventsOverrideInternal(aOverride, aRv);
}
void CanonicalBrowsingContext::SetTargetTopLevelLinkClicksToBlank(
bool aTargetTopLevelLinkClicksToBlank, ErrorResult& aRv) {
SetTargetTopLevelLinkClicksToBlankInternal(aTargetTopLevelLinkClicksToBlank,
aRv);
}
void CanonicalBrowsingContext::AddPageAwakeRequest() {
MOZ_ASSERT(IsTop());
auto count = GetPageAwakeRequestCount();
MOZ_ASSERT(count < UINT32_MAX);
Unused << SetPageAwakeRequestCount(++count);
}
void CanonicalBrowsingContext::RemovePageAwakeRequest() {
MOZ_ASSERT(IsTop());
auto count = GetPageAwakeRequestCount();
MOZ_ASSERT(count > 0);
Unused << SetPageAwakeRequestCount(--count);
}
void CanonicalBrowsingContext::CloneDocumentTreeInto(
CanonicalBrowsingContext* aSource, const nsACString& aRemoteType,
embedding::PrintData&& aPrintData) {
NavigationIsolationOptions options;
options.mRemoteType = aRemoteType;
mClonePromise =
ChangeRemoteness(options, /* aPendingSwitchId = */ 0)
->Then(
GetMainThreadSerialEventTarget(), __func__,
[source = MaybeDiscardedBrowsingContext{aSource},
data = std::move(aPrintData)](
const std::pair<RefPtr<BrowserParent>,
RefPtr<CanonicalBrowsingContext>>& aResult)
-> RefPtr<GenericNonExclusivePromise> {
const auto& [browserParent, browsingContext] = aResult;
RefPtr<BrowserBridgeParent> bridge =
browserParent->GetBrowserBridgeParent();
return browserParent
->SendCloneDocumentTreeIntoSelf(source, data)
->Then(
GetMainThreadSerialEventTarget(), __func__,
[bridge](
BrowserParent::CloneDocumentTreeIntoSelfPromise::
ResolveOrRejectValue&& aValue) {
// We're cloning a remote iframe, so we created a
// BrowserBridge which makes us register an OOP load
// (see Document::OOPChildLoadStarted), even though
// this isn't a real load. We call
// SendMaybeFireEmbedderLoadEvents here so that we do
// register the end of the load (see
// Document::OOPChildLoadDone).
if (bridge) {
Unused << bridge->SendMaybeFireEmbedderLoadEvents(
EmbedderElementEventType::NoEvent);
}
if (aValue.IsResolve() && aValue.ResolveValue()) {
return GenericNonExclusivePromise::CreateAndResolve(
true, __func__);
}
return GenericNonExclusivePromise::CreateAndReject(
NS_ERROR_FAILURE, __func__);
});
},
[](nsresult aRv) -> RefPtr<GenericNonExclusivePromise> {
NS_WARNING(
nsPrintfCString("Remote clone failed: %x\n", unsigned(aRv))
.get());
return GenericNonExclusivePromise::CreateAndReject(
NS_ERROR_FAILURE, __func__);
});
mClonePromise->Then(
GetMainThreadSerialEventTarget(), __func__,
[self = RefPtr{this}]() { self->mClonePromise = nullptr; });
}
bool CanonicalBrowsingContext::StartApzAutoscroll(float aAnchorX,
float aAnchorY,
nsViewID aScrollId,
uint32_t aPresShellId) {
nsCOMPtr<nsIWidget> widget;
mozilla::layers::LayersId layersId{0};
if (IsInProcess()) {
nsCOMPtr<nsPIDOMWindowOuter> outer = GetDOMWindow();
if (!outer) {
return false;
}
widget = widget::WidgetUtils::DOMWindowToWidget(outer);
if (widget) {
layersId = widget->GetRootLayerTreeId();
}
} else {
RefPtr<BrowserParent> parent = GetBrowserParent();
if (!parent) {
return false;
}
widget = parent->GetWidget();
layersId = parent->GetLayersId();
}
if (!widget || !widget->AsyncPanZoomEnabled()) {
return false;
}
// The anchor coordinates that are passed in are relative to the origin of the
// screen, but we are sending them to APZ which only knows about coordinates
// relative to the widget, so convert them accordingly.
const LayoutDeviceIntPoint anchor =
RoundedToInt(LayoutDevicePoint(aAnchorX, aAnchorY)) -
widget->WidgetToScreenOffset();
mozilla::layers::ScrollableLayerGuid guid(layersId, aPresShellId, aScrollId);
return widget->StartAsyncAutoscroll(
ViewAs<ScreenPixel>(
anchor, PixelCastJustification::LayoutDeviceIsScreenForBounds),
guid);
}
void CanonicalBrowsingContext::StopApzAutoscroll(nsViewID aScrollId,
uint32_t aPresShellId) {
nsCOMPtr<nsIWidget> widget;
mozilla::layers::LayersId layersId{0};
if (IsInProcess()) {
nsCOMPtr<nsPIDOMWindowOuter> outer = GetDOMWindow();
if (!outer) {
return;
}
widget = widget::WidgetUtils::DOMWindowToWidget(outer);
if (widget) {
layersId = widget->GetRootLayerTreeId();
}
} else {
RefPtr<BrowserParent> parent = GetBrowserParent();
if (!parent) {
return;
}
widget = parent->GetWidget();
layersId = parent->GetLayersId();
}
if (!widget || !widget->AsyncPanZoomEnabled()) {
return;
}
mozilla::layers::ScrollableLayerGuid guid(layersId, aPresShellId, aScrollId);
widget->StopAsyncAutoscroll(guid);
}
already_AddRefed<nsISHEntry>
CanonicalBrowsingContext::GetMostRecentLoadingSessionHistoryEntry() {
if (mLoadingEntries.IsEmpty()) {
return nullptr;
}
RefPtr<SessionHistoryEntry> entry = mLoadingEntries.LastElement().mEntry;
return entry.forget();
}
already_AddRefed<BounceTrackingState>
CanonicalBrowsingContext::GetBounceTrackingState() {
if (!mWebProgress) {
return nullptr;
}
return mWebProgress->GetBounceTrackingState();
}
bool CanonicalBrowsingContext::CanOpenModalPicker() {
if (!mozilla::StaticPrefs::browser_disable_pickers_background_tabs()) {
return true;
}
// Alway allows to open picker from chrome.
if (IsChrome()) {
return true;
}
if (!IsActive()) {
return false;
}
mozilla::dom::Element* topFrameElement = GetTopFrameElement();
if (!mozilla::StaticPrefs::
browser_disable_pickers_in_hidden_extension_pages() &&
Windowless()) {
WindowGlobalParent* wgp = GetCurrentWindowGlobal();
if (wgp && BasePrincipal::Cast(wgp->DocumentPrincipal())->AddonPolicy()) {
// This may be a HiddenExtensionPage, e.g. an extension background page.
return true;
}
}
RefPtr<Document> chromeDoc = TopCrossChromeBoundary()->GetExtantDocument();
if (!chromeDoc || !chromeDoc->HasFocus(mozilla::IgnoreErrors())) {
return false;
}
// Only allow web content to open a picker when it has focus. For example, if
// the focus is on the URL bar, web content cannot open a picker, even if it
// is the foreground tab.
// topFrameElement may be a <browser> embedded in another <browser>. In that
// case, verify that the full chain of <browser> elements has focus.
while (topFrameElement) {
RefPtr<Document> doc = topFrameElement->OwnerDoc();
if (doc->GetActiveElement() != topFrameElement) {
return false;
}
topFrameElement = doc->GetBrowsingContext()->GetTopFrameElement();
// Eventually topFrameElement == nullptr, implying that we have reached the
// top browser window (and chromeDoc == doc).
}
return true;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(CanonicalBrowsingContext)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(CanonicalBrowsingContext,
BrowsingContext)
tmp->mPermanentKey.setNull();
if (tmp->mSessionHistory) {
tmp->mSessionHistory->SetBrowsingContext(nullptr);
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(
mSessionHistory, mCurrentBrowserParent, mWebProgress,
mSessionStoreSessionStorageUpdateTimer, mActiveEntryList)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(CanonicalBrowsingContext,
BrowsingContext)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(
mSessionHistory, mCurrentBrowserParent, mWebProgress,
mSessionStoreSessionStorageUpdateTimer, mActiveEntryList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(CanonicalBrowsingContext,
BrowsingContext)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mPermanentKey)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_ADDREF_INHERITED(CanonicalBrowsingContext, BrowsingContext)
NS_IMPL_RELEASE_INHERITED(CanonicalBrowsingContext, BrowsingContext)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CanonicalBrowsingContext)
NS_INTERFACE_MAP_END_INHERITING(BrowsingContext)
} // namespace mozilla::dom
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