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Diffstat (limited to '')
| -rw-r--r-- | docshell/base/CanonicalBrowsingContext.cpp | 1694 |
1 files changed, 1694 insertions, 0 deletions
diff --git a/docshell/base/CanonicalBrowsingContext.cpp b/docshell/base/CanonicalBrowsingContext.cpp new file mode 100644 index 0000000000..7f01ff6cf8 --- /dev/null +++ b/docshell/base/CanonicalBrowsingContext.cpp @@ -0,0 +1,1694 @@ +/* -*- 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 "mozilla/CheckedInt.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/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/SessionHistoryEntry.h" +#include "mozilla/dom/SessionStorageManager.h" +#include "mozilla/ipc/ProtocolUtils.h" +#include "mozilla/net/DocumentLoadListener.h" +#include "mozilla/NullPrincipal.h" +#include "nsIWebNavigation.h" +#include "mozilla/MozPromiseInlines.h" +#include "nsDocShell.h" +#include "nsFrameLoader.h" +#include "nsFrameLoaderOwner.h" +#include "nsGlobalWindowOuter.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" + +using namespace mozilla::ipc; + +extern mozilla::LazyLogModule gAutoplayPermissionLog; +extern mozilla::LazyLogModule gSHLog; + +#define AUTOPLAY_LOG(msg, ...) \ + MOZ_LOG(gAutoplayPermissionLog, LogLevel::Debug, (msg, ##__VA_ARGS__)) + +namespace mozilla { +namespace 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) { + // You are only ever allowed to create CanonicalBrowsingContexts in the + // parent process. + MOZ_RELEASE_ASSERT(XRE_IsParentProcess()); +} + +/* 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(); + 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::MaybeAddAsProgressListener( + nsIWebProgress* aWebProgress) { + if (!GetWebProgress()) { + return; + } + if (!mStatusFilter) { + mStatusFilter = new nsBrowserStatusFilter(); + mStatusFilter->AddProgressListener(GetWebProgress(), + nsIWebProgress::NOTIFY_ALL); + } + aWebProgress->AddProgressListener(mStatusFilter, nsIWebProgress::NOTIFY_ALL); +} + +void CanonicalBrowsingContext::ReplacedBy( + CanonicalBrowsingContext* aNewContext) { + MOZ_ASSERT(!aNewContext->EverAttached()); + MOZ_ASSERT(IsTop() && aNewContext->IsTop()); + if (mStatusFilter) { + mStatusFilter->RemoveProgressListener(mWebProgress); + mStatusFilter = nullptr; + } + aNewContext->mWebProgress = std::move(mWebProgress); + aNewContext->mFields.SetWithoutSyncing<IDX_BrowserId>(GetBrowserId()); + aNewContext->mFields.SetWithoutSyncing<IDX_HistoryID>(GetHistoryID()); + aNewContext->mFields.SetWithoutSyncing<IDX_ExplicitActive>( + GetExplicitActive()); + + if (mSessionHistory) { + mSessionHistory->SetBrowsingContext(aNewContext); + mSessionHistory.swap(aNewContext->mSessionHistory); + RefPtr<ChildSHistory> childSHistory = ForgetChildSHistory(); + aNewContext->SetChildSHistory(childSHistory); + } + + if (mozilla::SessionHistoryInParent()) { + BackgroundSessionStorageManager::PropagateManager(Id(), aNewContext->Id()); + } + + MOZ_ASSERT(aNewContext->mLoadingEntries.IsEmpty()); + mLoadingEntries.SwapElements(aNewContext->mLoadingEntries); + MOZ_ASSERT(!aNewContext->mActiveEntry); + mActiveEntry.swap(aNewContext->mActiveEntry); +} + +void CanonicalBrowsingContext::UpdateSecurityState() { + if (mSecureBrowserUI) { + mSecureBrowserUI->RecomputeSecurityFlags(); + } +} + +void CanonicalBrowsingContext::SetInFlightProcessId(uint64_t aProcessId) { + MOZ_ASSERT(aProcessId); + mInFlightProcessId = aProcessId; +} + +void CanonicalBrowsingContext::ClearInFlightProcessId(uint64_t aProcessId) { + MOZ_ASSERT(aProcessId); + if (mInFlightProcessId == aProcessId) { + mInFlightProcessId = 0; + } +} + +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<WindowGlobalParent> +CanonicalBrowsingContext::GetEmbedderWindowGlobal() const { + uint64_t windowId = GetEmbedderInnerWindowId(); + if (windowId == 0) { + return nullptr; + } + + return WindowGlobalParent::GetByInnerWindowId(windowId); +} + +already_AddRefed<CanonicalBrowsingContext> +CanonicalBrowsingContext::GetParentCrossChromeBoundary() { + if (GetParent()) { + return do_AddRef(Cast(GetParent())); + } + if (GetEmbedderElement()) { + return do_AddRef( + Cast(GetEmbedderElement()->OwnerDoc()->GetBrowsingContext())); + } + return nullptr; +} + +already_AddRefed<CanonicalBrowsingContext> +CanonicalBrowsingContext::TopCrossChromeBoundary() { + RefPtr<CanonicalBrowsingContext> bc(this); + while (RefPtr<CanonicalBrowsingContext> parent = + bc->GetParentCrossChromeBoundary()) { + bc = parent.forget(); + } + return bc.forget(); +} + +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; +} + +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); + 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, int32_t* aRequestedIndex, + int32_t* aLength) { + *aRequestedIndex = -1; + *aLength = 0; + + 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()}); + *aRequestedIndex = shistory->GetRequestedIndex(); + *aLength = shistory->GetCount(); + Unused << SetHistoryID(she->DocshellID()); + } + break; + } + } + } +} + +UniquePtr<LoadingSessionHistoryInfo> +CanonicalBrowsingContext::CreateLoadingSessionHistoryEntryForLoad( + nsDocShellLoadState* aLoadState, nsIChannel* aChannel) { + RefPtr<SessionHistoryEntry> entry; + const LoadingSessionHistoryInfo* existingLoadingInfo = + aLoadState->GetLoadingSessionHistoryInfo(); + if (existingLoadingInfo) { + entry = SessionHistoryEntry::GetByLoadId(existingLoadingInfo->mLoadId); + MOZ_LOG(gSHLog, LogLevel::Verbose, + ("SHEntry::GetByLoadId(%" PRIu64 ") -> %p", + existingLoadingInfo->mLoadId, entry.get())); + if (!entry) { + return nullptr; + } + } else { + entry = new SessionHistoryEntry(aLoadState, aChannel); + if (IsTop()) { + // Only top level pages care about Get/SetPersist. + entry->SetPersist( + nsDocShell::ShouldAddToSessionHistory(aLoadState->URI(), aChannel)); + } else if (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) == entry); + + return loadingInfo; +} + +UniquePtr<LoadingSessionHistoryInfo> +CanonicalBrowsingContext::ReplaceLoadingSessionHistoryEntryForLoad( + LoadingSessionHistoryInfo* aInfo, nsIChannel* aChannel) { + MOZ_ASSERT(aInfo); + MOZ_ASSERT(aChannel); + + UniquePtr<SessionHistoryInfo> newInfo = MakeUnique<SessionHistoryInfo>( + aChannel, aInfo->mInfo.LoadType(), + aInfo->mInfo.GetPartitionedPrincipalToInherit(), aInfo->mInfo.GetCsp()); + + RefPtr<SessionHistoryEntry> newEntry = new SessionHistoryEntry(newInfo.get()); + if (IsTop()) { + // Only top level pages care about Get/SetPersist. + nsCOMPtr<nsIURI> uri; + aChannel->GetURI(getter_AddRefs(uri)); + newEntry->SetPersist(nsDocShell::ShouldAddToSessionHistory(uri, aChannel)); + } else { + newEntry->SetIsSubFrame(aInfo->mInfo.IsSubFrame()); + } + newEntry->SetDocshellID(GetHistoryID()); + newEntry->SetIsDynamicallyAdded(CreatedDynamically()); + newEntry->SetForInitialLoad(true); + + // Replacing the old entry. + SessionHistoryEntry::SetByLoadId(aInfo->mLoadId, newEntry); + + for (size_t i = 0; i < mLoadingEntries.Length(); ++i) { + if (mLoadingEntries[i].mLoadId == aInfo->mLoadId) { + mLoadingEntries[i].mEntry = newEntry; + break; + } + } + + return MakeUnique<LoadingSessionHistoryInfo>(newEntry, aInfo->mLoadId); +} + +void CanonicalBrowsingContext::CallOnAllTopDescendants( + const std::function<mozilla::CallState(CanonicalBrowsingContext*)>& + aCallback) { +#ifdef DEBUG + RefPtr<CanonicalBrowsingContext> parent = GetParentCrossChromeBoundary(); + MOZ_ASSERT(!parent, "Should only call on top chrome BC"); +#endif + + nsTArray<RefPtr<BrowsingContextGroup>> groups; + BrowsingContextGroup::GetAllGroups(groups); + for (auto& browsingContextGroup : groups) { + for (auto& bc : browsingContextGroup->Toplevels()) { + if (bc == this) { + // Cannot be a descendent of myself so skip. + continue; + } + + RefPtr<CanonicalBrowsingContext> top = + bc->Canonical()->TopCrossChromeBoundary(); + if (top == this) { + if (aCallback(bc->Canonical()) == CallState::Stop) { + return; + } + } + } + } +} + +void CanonicalBrowsingContext::SessionHistoryCommit(uint64_t aLoadId, + const nsID& aChangeID, + uint32_t aLoadType, + bool aPersist, + bool aCloneEntryChildren) { + MOZ_LOG(gSHLog, LogLevel::Verbose, + ("CanonicalBrowsingContext::SessionHistoryCommit %p %" PRIu64, this, + aLoadId)); + 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; + } + + CallerWillNotifyHistoryIndexAndLengthChanges caller(shistory); + + RefPtr<SessionHistoryEntry> newActiveEntry = mLoadingEntries[i].mEntry; + + bool loadFromSessionHistory = !newActiveEntry->ForInitialLoad(); + newActiveEntry->SetForInitialLoad(false); + SessionHistoryEntry::RemoveLoadId(aLoadId); + mLoadingEntries.RemoveElementAt(i); + + // 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()); }); + } + + bool addEntry = ShouldUpdateSessionHistory(aLoadType); + if (IsTop()) { + mActiveEntry = newActiveEntry; + if (loadFromSessionHistory) { + // XXX Synchronize browsing context tree and session history tree? + shistory->UpdateIndex(); + } else { + 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; + if (!addEntry) { + shistory->ReplaceEntry(index, mActiveEntry); + } + } + + if (addEntry) { + shistory->AddEntry(mActiveEntry, aPersist); + } + } + } 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); + } + mActiveEntry = newActiveEntry; + // 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)) { + // FIXME We need to make sure that when we create the info we + // make a copy of the shared state. + mActiveEntry->ReplaceWith(*newActiveEntry); + } else { + // AddChildSHEntryHelper does update the index of the session + // history! + shistory->AddChildSHEntryHelper(mActiveEntry, newActiveEntry, + Top(), aCloneEntryChildren); + 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) { + mActiveEntry = newActiveEntry; + // FIXME Using IsInProcess for aUseRemoteSubframes isn't quite + // right, but aUseRemoteSubframes should be going away. + parentEntry->AddChild( + mActiveEntry, + CreatedDynamically() ? -1 : GetParent()->IndexOf(this), + IsInProcess()); + } + } + } + } + + 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? +} + +static already_AddRefed<nsDocShellLoadState> 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); + loadState->SetLoadingSessionHistoryInfo(std::move(loadingInfo)); + + return loadState.forget(); +} + +void CanonicalBrowsingContext::NotifyOnHistoryReload( + bool aForceReload, bool& aCanReload, + Maybe<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(CreateLoadInfo(mActiveEntry)); + aReloadActiveEntry.emplace(true); + if (aForceReload) { + shistory->RemoveFrameEntries(mActiveEntry); + } + } else if (!mLoadingEntries.IsEmpty()) { + const LoadingSessionHistoryEntry& loadingEntry = + mLoadingEntries.LastElement(); + aLoadState.emplace(CreateLoadInfo(loadingEntry.mEntry)); + aReloadActiveEntry.emplace(false); + if (aForceReload) { + SessionHistoryEntry* entry = + SessionHistoryEntry::GetByLoadId(loadingEntry.mLoadId); + if (entry) { + shistory->RemoveFrameEntries(entry); + } + } + } + + if (aLoadState) { + int32_t index = 0; + int32_t requestedIndex = -1; + int32_t length = 0; + shistory->GetIndex(&index); + shistory->GetRequestedIndex(&requestedIndex); + shistory->GetCount(&length); + aLoadState.ref()->SetLoadIsFromSessionHistory( + requestedIndex >= 0 ? requestedIndex : index, length, + 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, + nsDocShell::ShouldAddToSessionHistory(aInfo->GetURI(), nullptr), + &previousEntryIndex, &loadedEntryIndex); + } else { + if (oldActiveEntry) { + shistory->AddChildSHEntryHelper(oldActiveEntry, mActiveEntry, Top(), + true); + } else if (GetParent() && GetParent()->mActiveEntry) { + GetParent()->mActiveEntry->AddChild( + mActiveEntry, CreatedDynamically() ? -1 : GetParent()->IndexOf(this), + UseRemoteSubframes()); + } + } + + ResetSHEntryHasUserInteractionCache(); + + // FIXME Need to do the equivalent of EvictContentViewersOrReplaceEntry. + HistoryCommitIndexAndLength(aChangeID, caller); + + static_cast<nsSHistory*>(shistory)->LogHistory(); +} + +void CanonicalBrowsingContext::ReplaceActiveSessionHistoryEntry( + SessionHistoryInfo* aInfo) { + if (!mActiveEntry) { + return; + } + + mActiveEntry->SetInfo(aInfo); + // Notify children of the update + nsSHistory* shistory = static_cast<nsSHistory*>(GetSessionHistory()); + if (shistory) { + shistory->NotifyOnHistoryReplaceEntry(); + shistory->UpdateRootBrowsingContextState(); + } + + ResetSHEntryHasUserInteractionCache(); + + // FIXME Need to do the equivalent of EvictContentViewersOrReplaceEntry. +} + +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() { + nsSHistory* shistory = static_cast<nsSHistory*>(GetSessionHistory()); + if (shistory) { + nsCOMPtr<nsISHEntry> root = nsSHistory::GetRootSHEntry(mActiveEntry); + bool didRemove; + AutoTArray<nsID, 16> ids({GetHistoryID()}); + shistory->RemoveEntries(ids, shistory->GetIndexOfEntry(root), &didRemove); + if (didRemove) { + BrowsingContext* rootBC = shistory->GetBrowsingContext(); + if (rootBC) { + if (!rootBC->IsInProcess()) { + Unused << rootBC->Canonical() + ->GetContentParent() + ->SendDispatchLocationChangeEvent(rootBC); + } else if (rootBC->GetDocShell()) { + rootBC->GetDocShell()->DispatchLocationChangeEvent(); + } + } + } + } +} + +void CanonicalBrowsingContext::HistoryGo( + int32_t aOffset, uint64_t aHistoryEpoch, bool aRequireUserInteraction, + Maybe<ContentParentId> aContentId, + std::function<void(int32_t&&)>&& aResolver) { + if (aRequireUserInteraction && aOffset != -1 && aOffset != 1) { + NS_ERROR( + "aRequireUserInteraction may only be used with an offset of -1 or 1"); + return; + } + + nsSHistory* shistory = static_cast<nsSHistory*>(GetSessionHistory()); + if (!shistory) { + return; + } + + 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; + } + + // 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 (!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); + if (NS_FAILED(rv)) { + MOZ_LOG(gSHLog, LogLevel::Debug, + ("Dropping HistoryGo - bad index or same epoch (not in same doc)")); + return; + } + if (epoch < aHistoryEpoch || aContentId != id) { + MOZ_LOG(gSHLog, LogLevel::Debug, ("Set epoch")); + shistory->SetEpoch(aHistoryEpoch, aContentId); + } + aResolver(shistory->GetRequestedIndex()); + nsSHistory::LoadURIs(loadResults); +} + +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 (IsTop()) { + BackgroundSessionStorageManager::RemoveManager(Id()); + } +} + +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) { + nsTHashtable<nsCStringHashKey> 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.PutEntry(siteOrigin); + } + } + }); + } + + return uniqueSiteOrigins.Count(); +} + +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(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) { + if (IsDiscarded()) { + return; + } + + // Stop any known network loads if necessary. + if (mCurrentLoad) { + mCurrentLoad->Cancel(NS_BINDING_ABORTED); + } + + if (nsDocShell* docShell = nsDocShell::Cast(GetDocShell())) { + if (aCancelContentJSEpoch.WasPassed()) { + docShell->SetCancelContentJSEpoch(aCancelContentJSEpoch.Value()); + } + docShell->GoBack(aRequireUserInteraction); + } else if (ContentParent* cp = GetContentParent()) { + Maybe<int32_t> cancelContentJSEpoch; + if (aCancelContentJSEpoch.WasPassed()) { + cancelContentJSEpoch = Some(aCancelContentJSEpoch.Value()); + } + Unused << cp->SendGoBack(this, cancelContentJSEpoch, + aRequireUserInteraction); + } +} +void CanonicalBrowsingContext::GoForward( + const Optional<int32_t>& aCancelContentJSEpoch, + bool aRequireUserInteraction) { + if (IsDiscarded()) { + return; + } + + // Stop any known network loads if necessary. + if (mCurrentLoad) { + mCurrentLoad->Cancel(NS_BINDING_ABORTED); + } + + if (auto* docShell = nsDocShell::Cast(GetDocShell())) { + if (aCancelContentJSEpoch.WasPassed()) { + docShell->SetCancelContentJSEpoch(aCancelContentJSEpoch.Value()); + } + docShell->GoForward(aRequireUserInteraction); + } else if (ContentParent* cp = GetContentParent()) { + Maybe<int32_t> cancelContentJSEpoch; + if (aCancelContentJSEpoch.WasPassed()) { + cancelContentJSEpoch.emplace(aCancelContentJSEpoch.Value()); + } + Unused << cp->SendGoForward(this, cancelContentJSEpoch, + aRequireUserInteraction); + } +} +void CanonicalBrowsingContext::GoToIndex( + int32_t aIndex, const Optional<int32_t>& aCancelContentJSEpoch) { + if (IsDiscarded()) { + return; + } + + // Stop any known network loads if necessary. + if (mCurrentLoad) { + mCurrentLoad->Cancel(NS_BINDING_ABORTED); + } + + if (auto* docShell = nsDocShell::Cast(GetDocShell())) { + if (aCancelContentJSEpoch.WasPassed()) { + docShell->SetCancelContentJSEpoch(aCancelContentJSEpoch.Value()); + } + docShell->GotoIndex(aIndex); + } else if (ContentParent* cp = GetContentParent()) { + Maybe<int32_t> cancelContentJSEpoch; + if (aCancelContentJSEpoch.WasPassed()) { + cancelContentJSEpoch.emplace(aCancelContentJSEpoch.Value()); + } + Unused << cp->SendGoToIndex(this, aIndex, cancelContentJSEpoch); + } +} +void CanonicalBrowsingContext::Reload(uint32_t aReloadFlags) { + if (IsDiscarded()) { + return; + } + + // Stop any known network loads if necessary. + if (mCurrentLoad) { + mCurrentLoad->Cancel(NS_BINDING_ABORTED); + } + + if (auto* 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); + } + + // 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::ProcessReady() { + if (!mPromise) { + return; + } + + // Wait for our blocker promise to resolve, if present. + if (mPrepareToChangePromise) { + mPrepareToChangePromise->Then( + GetMainThreadSerialEventTarget(), __func__, + [self = RefPtr{this}](bool) { self->Finish(); }, + [self = RefPtr{this}](nsresult aRv) { self->Cancel(aRv); }); + return; + } + + Finish(); +} + +void CanonicalBrowsingContext::PendingRemotenessChange::Finish() { + if (!mPromise) { + return; + } + + RefPtr<CanonicalBrowsingContext> target(mTarget); + if (target->IsDiscarded()) { + Cancel(NS_ERROR_FAILURE); + return; + } + + // 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. + if (!target->AncestorsAreCurrent()) { + NS_WARNING("Ancestor context is no longer current"); + Cancel(NS_ERROR_FAILURE); + return; + } + + // If this BrowsingContext is embedded within the parent process, perform the + // process switch directly. + if (Element* browserElement = target->GetEmbedderElement()) { + MOZ_DIAGNOSTIC_ASSERT(target->IsTop(), + "We shouldn't be trying to change the remoteness of " + "non-remote iframes"); + + nsCOMPtr<nsIBrowser> browser = browserElement->AsBrowser(); + if (!browser) { + Cancel(NS_ERROR_FAILURE); + return; + } + + RefPtr<nsFrameLoaderOwner> frameLoaderOwner = + do_QueryObject(browserElement); + MOZ_RELEASE_ASSERT(frameLoaderOwner, + "embedder browser must be nsFrameLoaderOwner"); + + // Tell frontend code that this browser element is about to change process. + nsresult rv = browser->BeforeChangeRemoteness(); + if (NS_FAILED(rv)) { + Cancel(rv); + return; + } + + // 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, + mContentParent ? u"true"_ns : u"false"_ns, + /* notify */ true); + + // The process has been created, hand off to nsFrameLoaderOwner to finish + // the process switch. + ErrorResult error; + frameLoaderOwner->ChangeRemotenessToProcess( + mContentParent, mReplaceBrowsingContext, mSpecificGroup, error); + if (error.Failed()) { + Cancel(error.StealNSResult()); + return; + } + + // Tell frontend the load is done. + bool loadResumed = false; + rv = browser->FinishChangeRemoteness(mPendingSwitchId, &loadResumed); + if (NS_WARN_IF(NS_FAILED(rv))) { + Cancel(rv); + return; + } + + // We did it! The process switch is complete. + RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader(); + RefPtr<BrowserParent> newBrowser = frameLoader->GetBrowserParent(); + if (!newBrowser) { + if (mContentParent) { + // Failed to create the BrowserParent somehow! Abort the process switch + // attempt. + Cancel(NS_ERROR_UNEXPECTED); + return; + } + + if (!loadResumed) { + RefPtr<nsDocShell> newDocShell = frameLoader->GetDocShell(error); + if (error.Failed()) { + Cancel(error.StealNSResult()); + return; + } + + rv = newDocShell->ResumeRedirectedLoad(mPendingSwitchId, + /* aHistoryIndex */ -1); + if (NS_FAILED(rv)) { + Cancel(error.StealNSResult()); + return; + } + } + } else if (!loadResumed) { + newBrowser->ResumeLoad(mPendingSwitchId); + } + + mPromise->Resolve(newBrowser, __func__); + Clear(); + return; + } + + if (NS_WARN_IF(!mContentParent)) { + Cancel(NS_ERROR_FAILURE); + return; + } + + RefPtr<WindowGlobalParent> embedderWindow = target->GetEmbedderWindowGlobal(); + if (NS_WARN_IF(!embedderWindow) || NS_WARN_IF(!embedderWindow->CanSend())) { + Cancel(NS_ERROR_FAILURE); + return; + } + + RefPtr<BrowserParent> embedderBrowser = embedderWindow->GetBrowserParent(); + if (NS_WARN_IF(!embedderBrowser)) { + Cancel(NS_ERROR_FAILURE); + return; + } + + // Pull load flags from our embedder browser. + nsCOMPtr<nsILoadContext> loadContext = embedderBrowser->GetLoadContext(); + MOZ_DIAGNOSTIC_ASSERT( + loadContext->UseRemoteTabs() && loadContext->UseRemoteSubframes(), + "Not supported without fission"); + + // NOTE: These are the only flags we actually care about + uint32_t chromeFlags = nsIWebBrowserChrome::CHROME_REMOTE_WINDOW | + nsIWebBrowserChrome::CHROME_FISSION_WINDOW; + if (loadContext->UsePrivateBrowsing()) { + chromeFlags |= nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW; + } + + RefPtr<WindowGlobalParent> oldWindow = target->GetCurrentWindowGlobal(); + RefPtr<BrowserParent> oldBrowser = + oldWindow ? oldWindow->GetBrowserParent() : nullptr; + bool wasRemote = oldWindow && oldWindow->IsProcessRoot(); + + // Update which process is considered the current owner + uint64_t inFlightProcessId = target->OwnerProcessId(); + target->SetInFlightProcessId(inFlightProcessId); + target->SetOwnerProcessId(mContentParent->ChildID()); + + auto resetInFlightId = [target, inFlightProcessId] { + target->ClearInFlightProcessId(inFlightProcessId); + }; + + // If we were in a remote frame, trigger unloading of the remote window. When + // the original remote window acknowledges, we can clear the in-flight ID. + if (wasRemote) { + MOZ_DIAGNOSTIC_ASSERT(oldBrowser); + MOZ_DIAGNOSTIC_ASSERT(oldBrowser != embedderBrowser); + MOZ_DIAGNOSTIC_ASSERT(oldBrowser->GetBrowserBridgeParent()); + + auto callback = [resetInFlightId](auto) { resetInFlightId(); }; + oldBrowser->SendWillChangeProcess(callback, callback); + oldBrowser->Destroy(); + } + + MOZ_ASSERT(!mReplaceBrowsingContext, "Cannot replace BC for subframe"); + nsCOMPtr<nsIPrincipal> initialPrincipal = + NullPrincipal::CreateWithInheritedAttributes( + target->OriginAttributesRef(), + /* isFirstParty */ false); + 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, mContentParent, + windowInit, chromeFlags, tabId); + if (NS_WARN_IF(NS_FAILED(rv))) { + Cancel(rv); + return; + } + + // 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(); + { + auto callback = [wasRemote, resetInFlightId](auto) { + if (!wasRemote) { + resetInFlightId(); + } + }; + + ManagedEndpoint<PBrowserBridgeChild> endpoint = + embedderBrowser->OpenPBrowserBridgeEndpoint(bridge); + if (NS_WARN_IF(!endpoint.IsValid())) { + Cancel(NS_ERROR_UNEXPECTED); + return; + } + 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(newBrowser, __func__); + Clear(); +} + +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 + // `mContentParent`. + if (mContentParent) { + mContentParent->RemoveKeepAlive(); + mContentParent = nullptr; + } + + // If we were given a specific group, stop keeping that group alive manually. + if (mSpecificGroup) { + mSpecificGroup->RemoveKeepAlive(); + mSpecificGroup = nullptr; + } + + mPromise = nullptr; + mTarget = nullptr; + mPrepareToChangePromise = nullptr; +} + +CanonicalBrowsingContext::PendingRemotenessChange::PendingRemotenessChange( + CanonicalBrowsingContext* aTarget, RemotenessPromise::Private* aPromise, + uint64_t aPendingSwitchId, bool aReplaceBrowsingContext) + : mTarget(aTarget), + mPromise(aPromise), + mPendingSwitchId(aPendingSwitchId), + mReplaceBrowsingContext(aReplaceBrowsingContext) {} + +CanonicalBrowsingContext::PendingRemotenessChange::~PendingRemotenessChange() { + MOZ_ASSERT(!mPromise && !mTarget && !mContentParent && !mSpecificGroup && + !mPrepareToChangePromise, + "should've already been Cancel() or Complete()-ed"); +} + +BrowserParent* CanonicalBrowsingContext::GetBrowserParent() const { + if (auto* wg = GetCurrentWindowGlobal()) { + return wg->GetBrowserParent(); + } + return nullptr; +} + +RefPtr<CanonicalBrowsingContext::RemotenessPromise> +CanonicalBrowsingContext::ChangeRemoteness(const nsACString& aRemoteType, + uint64_t aPendingSwitchId, + bool aReplaceBrowsingContext, + uint64_t aSpecificGroupId) { + 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(!aReplaceBrowsingContext || IsTop(), + "Cannot replace BrowsingContext for subframes"); + MOZ_DIAGNOSTIC_ASSERT(aSpecificGroupId == 0 || aReplaceBrowsingContext, + "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 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__); + } + + if (aRemoteType.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"); + } + + RefPtr<BrowserParent> embedderBrowser = + embedderWindowGlobal->GetBrowserParent(); + // Switching to local. No new process, so perform switch sync. + if (embedderBrowser && + aRemoteType == 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"); + if (GetCurrentWindowGlobal()) { + MOZ_DIAGNOSTIC_ASSERT(GetCurrentWindowGlobal()->IsProcessRoot()); + RefPtr<BrowserParent> oldBrowser = + GetCurrentWindowGlobal()->GetBrowserParent(); + + uint64_t targetProcessId = OwnerProcessId(); + SetInFlightProcessId(targetProcessId); + auto callback = [target = RefPtr{this}, targetProcessId](auto) { + target->ClearInFlightProcessId(targetProcessId); + }; + oldBrowser->SendWillChangeProcess(callback, callback); + oldBrowser->Destroy(); + } + + // If the embedder process is remote, tell that remote process to become + // the owner. + MOZ_DIAGNOSTIC_ASSERT(!aReplaceBrowsingContext); + MOZ_DIAGNOSTIC_ASSERT(!aRemoteType.IsEmpty()); + SetOwnerProcessId(embedderBrowser->Manager()->ChildID()); + Unused << embedderWindowGlobal->SendMakeFrameLocal(this, aPendingSwitchId); + return RemotenessPromise::CreateAndResolve(embedderBrowser, __func__); + } + + // Switching to remote. Wait for new process to launch before switch. + auto promise = MakeRefPtr<RemotenessPromise::Private>(__func__); + RefPtr<PendingRemotenessChange> change = new PendingRemotenessChange( + this, promise, aPendingSwitchId, aReplaceBrowsingContext); + mPendingRemotenessChange = change; + + // If a specific BrowsingContextGroup ID was specified for this load, make + // sure to keep it alive until the process switch is completed. + if (aSpecificGroupId) { + change->mSpecificGroup = + BrowsingContextGroup::GetOrCreate(aSpecificGroupId); + 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(); + } + change->mPrepareToChangePromise = GenericPromise::FromDomPromise(blocker); + } + + if (aRemoteType.IsEmpty()) { + change->ProcessReady(); + } else { + // 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 = + aReplaceBrowsingContext ? change->mSpecificGroup.get() : Group(); + + change->mContentParent = ContentParent::GetNewOrUsedLaunchingBrowserProcess( + /* aRemoteType = */ aRemoteType, + /* aGroup = */ finalGroup, + /* aPriority = */ hal::PROCESS_PRIORITY_FOREGROUND, + /* aPreferUsed = */ false); + if (!change->mContentParent) { + change->Cancel(NS_ERROR_FAILURE); + return promise.forget(); + } + + // Add a KeepAlive used by this ContentParent, which will be cleared when + // the change is complete. This should prevent the process dying before + // we're ready to use it. + change->mContentParent->AddKeepAlive(); + change->mContentParent->WaitForLaunchAsync()->Then( + GetMainThreadSerialEventTarget(), __func__, + [change](ContentParent*) { change->ProcessReady(); }, + [change](LaunchError) { change->Cancel(NS_ERROR_FAILURE); }); + } + return promise.forget(); +} + +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; + } + + // 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::SchemeIsHTTP(aLoadState->URI()) && + !net::SchemeIsHTTPS(aLoadState->URI())) { + return false; + } + + if (WindowGlobalParent* global = GetCurrentWindowGlobal()) { + nsCOMPtr<nsIURI> currentURI = global->GetDocumentURI(); + if (currentURI) { + bool newURIHasRef = false; + aLoadState->URI()->GetHasRef(&newURIHasRef); + bool equalsExceptRef = false; + aLoadState->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 the current document has a beforeunload listener, then we need to + // start the load in that process after we fire the event. + if (global->HasBeforeUnload()) { + 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; + } + + // 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; + } + + // Session-history-in-parent implementation relies currently on getting a + // round trip through a child process. + if (aLoadState->LoadIsFromSessionHistory()) { + 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) { + mCurrentLoad->Cancel(NS_BINDING_ABORTED); + } + mCurrentLoad = aLoad; + + if (NS_FAILED(SetCurrentLoadIdentifier(Some(aLoad->GetLoadIdentifier())))) { + mCurrentLoad = nullptr; + return false; + } + + return true; +} + +void CanonicalBrowsingContext::EndDocumentLoad(bool aForProcessSwitch) { + mCurrentLoad = nullptr; + + if (!aForProcessSwitch) { + // Resetting the current load identifier on a discarded context + // has no effect when a document load has finished. + Unused << SetCurrentLoadIdentifier(Nothing()); + } +} + +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); + + Group()->EachParent([&](ContentParent* aParent) { + Unused << aParent->SendHistoryCommitIndexAndLength(this, index, length, + aChangeID); + }); +} + +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::SetContainerFeaturePolicy( + FeaturePolicy* aContainerFeaturePolicy) { + mContainerFeaturePolicy = aContainerFeaturePolicy; + + if (WindowGlobalParent* current = GetCurrentWindowGlobal()) { + Unused << current->SendSetContainerFeaturePolicy(mContainerFeaturePolicy); + } +} + +void CanonicalBrowsingContext::SetCrossGroupOpenerId(uint64_t aOpenerId) { + MOZ_DIAGNOSTIC_ASSERT(IsTopContent()); + MOZ_DIAGNOSTIC_ASSERT(mCrossGroupOpenerId == 0, + "Can only set CrossGroupOpenerId once"); + mCrossGroupOpenerId = aOpenerId; +} + +NS_IMPL_CYCLE_COLLECTION_INHERITED(CanonicalBrowsingContext, BrowsingContext, + mSessionHistory, mContainerFeaturePolicy) + +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 dom +} // namespace mozilla |