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| -rw-r--r-- | docshell/base/CanonicalBrowsingContext.h | 601 |
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diff --git a/docshell/base/CanonicalBrowsingContext.h b/docshell/base/CanonicalBrowsingContext.h new file mode 100644 index 0000000000..9420c7e647 --- /dev/null +++ b/docshell/base/CanonicalBrowsingContext.h @@ -0,0 +1,601 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef mozilla_dom_CanonicalBrowsingContext_h +#define mozilla_dom_CanonicalBrowsingContext_h + +#include "mozilla/dom/BrowsingContext.h" +#include "mozilla/dom/MediaControlKeySource.h" +#include "mozilla/dom/BrowsingContextWebProgress.h" +#include "mozilla/dom/ProcessIsolation.h" +#include "mozilla/dom/Promise.h" +#include "mozilla/dom/SessionHistoryEntry.h" +#include "mozilla/dom/SessionStoreRestoreData.h" +#include "mozilla/dom/SessionStoreUtils.h" +#include "mozilla/dom/ipc/IdType.h" +#include "mozilla/RefPtr.h" +#include "mozilla/MozPromise.h" +#include "nsCycleCollectionParticipant.h" +#include "nsWrapperCache.h" +#include "nsTArray.h" +#include "nsTHashtable.h" +#include "nsHashKeys.h" +#include "nsISecureBrowserUI.h" + +class nsIBrowserDOMWindow; +class nsISHistory; +class nsIWidget; +class nsIPrintSettings; +class nsSHistory; +class nsBrowserStatusFilter; +class nsSecureBrowserUI; +class CallerWillNotifyHistoryIndexAndLengthChanges; +class nsITimer; + +namespace mozilla { +enum class CallState; + +namespace embedding { +class PrintData; +} + +namespace net { +class DocumentLoadListener; +} + +namespace dom { + +class BrowserParent; +class BrowserBridgeParent; +class FeaturePolicy; +struct LoadURIOptions; +class MediaController; +struct LoadingSessionHistoryInfo; +class SSCacheCopy; +class WindowGlobalParent; +class SessionStoreFormData; +class SessionStoreScrollData; + +// CanonicalBrowsingContext is a BrowsingContext living in the parent +// process, with whatever extra data that a BrowsingContext in the +// parent needs. +class CanonicalBrowsingContext final : public BrowsingContext { + public: + NS_DECL_ISUPPORTS_INHERITED + NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED( + CanonicalBrowsingContext, BrowsingContext) + + static already_AddRefed<CanonicalBrowsingContext> Get(uint64_t aId); + static CanonicalBrowsingContext* Cast(BrowsingContext* aContext); + static const CanonicalBrowsingContext* Cast(const BrowsingContext* aContext); + static already_AddRefed<CanonicalBrowsingContext> Cast( + already_AddRefed<BrowsingContext>&& aContext); + + bool IsOwnedByProcess(uint64_t aProcessId) const { + return mProcessId == aProcessId; + } + bool IsEmbeddedInProcess(uint64_t aProcessId) const { + return mEmbedderProcessId == aProcessId; + } + uint64_t OwnerProcessId() const { return mProcessId; } + uint64_t EmbedderProcessId() const { return mEmbedderProcessId; } + ContentParent* GetContentParent() const; + + void GetCurrentRemoteType(nsACString& aRemoteType, ErrorResult& aRv) const; + + void SetOwnerProcessId(uint64_t aProcessId); + + // The ID of the BrowsingContext which caused this BrowsingContext to be + // opened, or `0` if this is unknown. + // Only set for toplevel content BrowsingContexts, and may be from a different + // BrowsingContextGroup. + uint64_t GetCrossGroupOpenerId() const { return mCrossGroupOpenerId; } + void SetCrossGroupOpenerId(uint64_t aOpenerId); + void SetCrossGroupOpener(CanonicalBrowsingContext& aCrossGroupOpener, + ErrorResult& aRv); + + void GetWindowGlobals(nsTArray<RefPtr<WindowGlobalParent>>& aWindows); + + // The current active WindowGlobal. + WindowGlobalParent* GetCurrentWindowGlobal() const; + + // Same as the methods on `BrowsingContext`, but with the types already cast + // to the parent process type. + CanonicalBrowsingContext* GetParent() { + return Cast(BrowsingContext::GetParent()); + } + CanonicalBrowsingContext* Top() { return Cast(BrowsingContext::Top()); } + WindowGlobalParent* GetParentWindowContext(); + WindowGlobalParent* GetTopWindowContext(); + + already_AddRefed<nsIWidget> GetParentProcessWidgetContaining(); + already_AddRefed<nsIBrowserDOMWindow> GetBrowserDOMWindow(); + + // Same as `GetParentWindowContext`, but will also cross <browser> and + // content/chrome boundaries. + already_AddRefed<WindowGlobalParent> GetEmbedderWindowGlobal() const; + + already_AddRefed<CanonicalBrowsingContext> GetParentCrossChromeBoundary(); + + already_AddRefed<CanonicalBrowsingContext> TopCrossChromeBoundary(); + Nullable<WindowProxyHolder> GetTopChromeWindow(); + + nsISHistory* GetSessionHistory(); + SessionHistoryEntry* GetActiveSessionHistoryEntry(); + void SetActiveSessionHistoryEntry(SessionHistoryEntry* aEntry); + + UniquePtr<LoadingSessionHistoryInfo> CreateLoadingSessionHistoryEntryForLoad( + nsDocShellLoadState* aLoadState, SessionHistoryEntry* aExistingEntry, + nsIChannel* aChannel); + + UniquePtr<LoadingSessionHistoryInfo> ReplaceLoadingSessionHistoryEntryForLoad( + LoadingSessionHistoryInfo* aInfo, nsIChannel* aNewChannel); + + using PrintPromise = MozPromise</* unused */ bool, nsresult, false>; + MOZ_CAN_RUN_SCRIPT RefPtr<PrintPromise> Print(nsIPrintSettings*); + MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> PrintJS(nsIPrintSettings*, + ErrorResult&); + + // Call the given callback on all top-level descendant BrowsingContexts. + // Return Callstate::Stop from the callback to stop calling + // further children. + void CallOnAllTopDescendants( + const std::function<mozilla::CallState(CanonicalBrowsingContext*)>& + aCallback); + + void SessionHistoryCommit(uint64_t aLoadId, const nsID& aChangeID, + uint32_t aLoadType, bool aPersist, + bool aCloneEntryChildren, bool aChannelExpired, + uint32_t aCacheKey); + + // Calls the session history listeners' OnHistoryReload, storing the result in + // aCanReload. If aCanReload is set to true and we have an active or a loading + // entry then aLoadState will be initialized from that entry, and + // aReloadActiveEntry will be true if we have an active entry. If aCanReload + // is true and aLoadState and aReloadActiveEntry are not set then we should + // attempt to reload based on the current document in the docshell. + void NotifyOnHistoryReload( + bool aForceReload, bool& aCanReload, + Maybe<NotNull<RefPtr<nsDocShellLoadState>>>& aLoadState, + Maybe<bool>& aReloadActiveEntry); + + // See BrowsingContext::SetActiveSessionHistoryEntry. + void SetActiveSessionHistoryEntry(const Maybe<nsPoint>& aPreviousScrollPos, + SessionHistoryInfo* aInfo, + uint32_t aLoadType, + uint32_t aUpdatedCacheKey, + const nsID& aChangeID); + + void ReplaceActiveSessionHistoryEntry(SessionHistoryInfo* aInfo); + + void RemoveDynEntriesFromActiveSessionHistoryEntry(); + + void RemoveFromSessionHistory(const nsID& aChangeID); + + Maybe<int32_t> HistoryGo(int32_t aOffset, uint64_t aHistoryEpoch, + bool aRequireUserInteraction, bool aUserActivation, + Maybe<ContentParentId> aContentId); + + JSObject* WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + // Dispatches a wheel zoom change to the embedder element. + void DispatchWheelZoomChange(bool aIncrease); + + // This function is used to start the autoplay media which are delayed to + // start. If needed, it would also notify the content browsing context which + // are related with the canonical browsing content tree to start delayed + // autoplay media. + void NotifyStartDelayedAutoplayMedia(); + + // This function is used to mute or unmute all media within a tab. It would + // set the media mute property for the top level window and propagate it to + // other top level windows in other processes. + void NotifyMediaMutedChanged(bool aMuted, ErrorResult& aRv); + + // Return the number of unique site origins by iterating all given BCs, + // including their subtrees. + static uint32_t CountSiteOrigins( + GlobalObject& aGlobal, + const Sequence<mozilla::OwningNonNull<BrowsingContext>>& aRoots); + + // Return true if a private browsing session is active. + static bool IsPrivateBrowsingActive(); + + // This function would propogate the action to its all child browsing contexts + // in content processes. + void UpdateMediaControlAction(const MediaControlAction& aAction); + + // Triggers a load in the process + using BrowsingContext::LoadURI; + void FixupAndLoadURIString(const nsAString& aURI, + const LoadURIOptions& aOptions, + ErrorResult& aError); + void LoadURI(nsIURI* aURI, const LoadURIOptions& aOptions, + ErrorResult& aError); + + void GoBack(const Optional<int32_t>& aCancelContentJSEpoch, + bool aRequireUserInteraction, bool aUserActivation); + void GoForward(const Optional<int32_t>& aCancelContentJSEpoch, + bool aRequireUserInteraction, bool aUserActivation); + void GoToIndex(int32_t aIndex, const Optional<int32_t>& aCancelContentJSEpoch, + bool aUserActivation); + void Reload(uint32_t aReloadFlags); + void Stop(uint32_t aStopFlags); + + // Get the publicly exposed current URI loaded in this BrowsingContext. + already_AddRefed<nsIURI> GetCurrentURI() const; + void SetCurrentRemoteURI(nsIURI* aCurrentRemoteURI); + + BrowserParent* GetBrowserParent() const; + void SetCurrentBrowserParent(BrowserParent* aBrowserParent); + + // Internal method to change which process a BrowsingContext is being loaded + // in. The returned promise will resolve when the process switch is completed. + // + // A NOT_REMOTE_TYPE aRemoteType argument will perform a process switch into + // the parent process, and the method will resolve with a null BrowserParent. + using RemotenessPromise = MozPromise<RefPtr<BrowserParent>, nsresult, false>; + RefPtr<RemotenessPromise> ChangeRemoteness( + const NavigationIsolationOptions& aOptions, uint64_t aPendingSwitchId); + + // Return a media controller from the top-level browsing context that can + // control all media belonging to this browsing context tree. Return nullptr + // if the top-level browsing context has been discarded. + MediaController* GetMediaController(); + bool HasCreatedMediaController() const; + + // Attempts to start loading the given load state in this BrowsingContext, + // without requiring any communication from a docshell. This will handle + // computing the right process to load in, and organising handoff to + // the right docshell when we get a response. + bool LoadInParent(nsDocShellLoadState* aLoadState, bool aSetNavigating); + + // Attempts to start loading the given load state in this BrowsingContext, + // in parallel with a DocumentChannelChild being created in the docshell. + // Requires the DocumentChannel to connect with this load for it to + // complete successfully. + bool AttemptSpeculativeLoadInParent(nsDocShellLoadState* aLoadState); + + // Get or create a secure browser UI for this BrowsingContext + nsISecureBrowserUI* GetSecureBrowserUI(); + + BrowsingContextWebProgress* GetWebProgress() { return mWebProgress; } + + // Called when the current URI changes (from an + // nsIWebProgressListener::OnLocationChange event, so that we + // can update our security UI for the new location, or when the + // mixed content/https-only state for our current window is changed. + void UpdateSecurityState(); + + void MaybeAddAsProgressListener(nsIWebProgress* aWebProgress); + + // Called when a navigation forces us to recreate our browsing + // context (for example, when switching in or out of the parent + // process). + // aNewContext is the newly created BrowsingContext that is replacing + // us. + void ReplacedBy(CanonicalBrowsingContext* aNewContext, + const NavigationIsolationOptions& aRemotenessOptions); + + bool HasHistoryEntry(nsISHEntry* aEntry); + bool HasLoadingHistoryEntry(nsISHEntry* aEntry) { + for (const LoadingSessionHistoryEntry& loading : mLoadingEntries) { + if (loading.mEntry == aEntry) { + return true; + } + } + return false; + } + + void SwapHistoryEntries(nsISHEntry* aOldEntry, nsISHEntry* aNewEntry); + + void AddLoadingSessionHistoryEntry(uint64_t aLoadId, + SessionHistoryEntry* aEntry); + + void GetLoadingSessionHistoryInfoFromParent( + Maybe<LoadingSessionHistoryInfo>& aLoadingInfo); + + void HistoryCommitIndexAndLength(); + + void SynchronizeLayoutHistoryState(); + + void ResetScalingZoom(); + + void SetContainerFeaturePolicy(FeaturePolicy* aContainerFeaturePolicy); + FeaturePolicy* GetContainerFeaturePolicy() const { + return mContainerFeaturePolicy; + } + + void SetRestoreData(SessionStoreRestoreData* aData, ErrorResult& aError); + void ClearRestoreState(); + MOZ_CAN_RUN_SCRIPT_BOUNDARY void RequestRestoreTabContent( + WindowGlobalParent* aWindow); + already_AddRefed<Promise> GetRestorePromise(); + + nsresult WriteSessionStorageToSessionStore( + const nsTArray<SSCacheCopy>& aSesssionStorage, uint32_t aEpoch); + + void UpdateSessionStoreSessionStorage(const std::function<void()>& aDone); + + static void UpdateSessionStoreForStorage(uint64_t aBrowsingContextId); + + // Called when a BrowserParent for this BrowsingContext has been fully + // destroyed (i.e. `ActorDestroy` was called). + void BrowserParentDestroyed(BrowserParent* aBrowserParent, + bool aAbnormalShutdown); + + void StartUnloadingHost(uint64_t aChildID); + void ClearUnloadingHost(uint64_t aChildID); + + bool AllowedInBFCache(const Maybe<uint64_t>& aChannelId, nsIURI* aNewURI); + + // Methods for getting and setting the active state for top level + // browsing contexts, for the process priority manager. + bool IsPriorityActive() const { + MOZ_RELEASE_ASSERT(IsTop()); + return mPriorityActive; + } + void SetPriorityActive(bool aIsActive) { + MOZ_RELEASE_ASSERT(IsTop()); + mPriorityActive = aIsActive; + } + + void SetTouchEventsOverride(dom::TouchEventsOverride, ErrorResult& aRv); + void SetTargetTopLevelLinkClicksToBlank(bool aTargetTopLevelLinkClicksToBlank, + ErrorResult& aRv); + + bool IsReplaced() const { return mIsReplaced; } + + const JS::Heap<JS::Value>& PermanentKey() { return mPermanentKey; } + void ClearPermanentKey() { mPermanentKey.setNull(); } + void MaybeSetPermanentKey(Element* aEmbedder); + + // When request for page awake, it would increase a count that is used to + // prevent whole browsing context tree from being suspended. The request can + // be called multiple times. When calling the revoke, it would decrease the + // count and once the count reaches to zero, the browsing context tree could + // be suspended when the tree is inactive. + void AddPageAwakeRequest(); + void RemovePageAwakeRequest(); + + void CloneDocumentTreeInto(CanonicalBrowsingContext* aSource, + const nsACString& aRemoteType, + embedding::PrintData&& aPrintData); + + // Returns a Promise which resolves when cloning documents for printing + // finished if this browsing context is cloning document tree. + RefPtr<GenericNonExclusivePromise> GetClonePromise() const { + return mClonePromise; + } + + bool StartApzAutoscroll(float aAnchorX, float aAnchorY, nsViewID aScrollId, + uint32_t aPresShellId); + void StopApzAutoscroll(nsViewID aScrollId, uint32_t aPresShellId); + + void AddFinalDiscardListener(std::function<void(uint64_t)>&& aListener); + + bool ForceAppWindowActive() const { return mForceAppWindowActive; } + void SetForceAppWindowActive(bool, ErrorResult&); + void RecomputeAppWindowVisibility(); + + already_AddRefed<nsISHEntry> GetMostRecentLoadingSessionHistoryEntry(); + + protected: + // Called when the browsing context is being discarded. + void CanonicalDiscard(); + + // Called when the browsing context is being attached. + void CanonicalAttach(); + + // Called when the browsing context private mode is changed after + // being attached, but before being discarded. + void AdjustPrivateBrowsingCount(bool aPrivateBrowsing); + + using Type = BrowsingContext::Type; + CanonicalBrowsingContext(WindowContext* aParentWindow, + BrowsingContextGroup* aGroup, + uint64_t aBrowsingContextId, + uint64_t aOwnerProcessId, + uint64_t aEmbedderProcessId, Type aType, + FieldValues&& aInit); + + private: + friend class BrowsingContext; + + virtual ~CanonicalBrowsingContext(); + + class PendingRemotenessChange { + public: + NS_INLINE_DECL_REFCOUNTING(PendingRemotenessChange) + + PendingRemotenessChange(CanonicalBrowsingContext* aTarget, + RemotenessPromise::Private* aPromise, + uint64_t aPendingSwitchId, + const NavigationIsolationOptions& aOptions); + + void Cancel(nsresult aRv); + + private: + friend class CanonicalBrowsingContext; + + ~PendingRemotenessChange(); + void ProcessLaunched(); + void ProcessReady(); + void MaybeFinish(); + void Clear(); + + nsresult FinishTopContent(); + nsresult FinishSubframe(); + + RefPtr<CanonicalBrowsingContext> mTarget; + RefPtr<RemotenessPromise::Private> mPromise; + RefPtr<ContentParent> mContentParent; + RefPtr<BrowsingContextGroup> mSpecificGroup; + + bool mProcessReady = false; + bool mWaitingForPrepareToChange = false; + + uint64_t mPendingSwitchId; + NavigationIsolationOptions mOptions; + }; + + struct RestoreState { + NS_INLINE_DECL_REFCOUNTING(RestoreState) + + void ClearData() { mData = nullptr; } + void Resolve(); + + RefPtr<SessionStoreRestoreData> mData; + RefPtr<Promise> mPromise; + uint32_t mRequests = 0; + uint32_t mResolves = 0; + + private: + ~RestoreState() = default; + }; + + friend class net::DocumentLoadListener; + // Called when a DocumentLoadListener is created to start a load for + // this browsing context. Returns false if a higher priority load is + // already in-progress and the new one has been rejected. + bool StartDocumentLoad(net::DocumentLoadListener* aLoad); + // Called once DocumentLoadListener completes handling a load, and it + // is either complete, or handed off to the final channel to deliver + // data to the destination docshell. + // If aContinueNavigating it set, the reference to the DocumentLoadListener + // will be cleared to prevent it being cancelled, however the current load ID + // will be preserved until `EndDocumentLoad` is called again. + void EndDocumentLoad(bool aContinueNavigating); + + bool SupportsLoadingInParent(nsDocShellLoadState* aLoadState, + uint64_t* aOuterWindowId); + + void HistoryCommitIndexAndLength( + const nsID& aChangeID, + const CallerWillNotifyHistoryIndexAndLengthChanges& aProofOfCaller); + + struct UnloadingHost { + uint64_t mChildID; + nsTArray<std::function<void()>> mCallbacks; + }; + nsTArray<UnloadingHost>::iterator FindUnloadingHost(uint64_t aChildID); + + // Called when we want to show the subframe crashed UI as our previous browser + // has become unloaded for one reason or another. + void ShowSubframeCrashedUI(BrowserBridgeParent* aBridge); + + void MaybeScheduleSessionStoreUpdate(); + + void CancelSessionStoreUpdate(); + + void AddPendingDiscard(); + + void RemovePendingDiscard(); + + bool ShouldAddEntryForRefresh(const SessionHistoryEntry* aEntry) { + return ShouldAddEntryForRefresh(aEntry->Info().GetURI(), + aEntry->Info().HasPostData()); + } + bool ShouldAddEntryForRefresh(nsIURI* aNewURI, bool aHasPostData) { + nsCOMPtr<nsIURI> currentURI = GetCurrentURI(); + return BrowsingContext::ShouldAddEntryForRefresh(currentURI, aNewURI, + aHasPostData); + } + + already_AddRefed<nsDocShellLoadState> CreateLoadInfo( + SessionHistoryEntry* aEntry); + + // XXX(farre): Store a ContentParent pointer here rather than mProcessId? + // Indicates which process owns the docshell. + uint64_t mProcessId; + + // Indicates which process owns the embedder element. + uint64_t mEmbedderProcessId; + + uint64_t mCrossGroupOpenerId = 0; + + // This function will make the top window context reset its + // "SHEntryHasUserInteraction" cache that prevents documents from repeatedly + // setting user interaction on SH entries. Should be called anytime SH + // entries are added or replaced. + void ResetSHEntryHasUserInteractionCache(); + + RefPtr<BrowserParent> mCurrentBrowserParent; + + nsTArray<UnloadingHost> mUnloadingHosts; + + // The current URI loaded in this BrowsingContext. This value is only set for + // BrowsingContexts loaded in content processes. + nsCOMPtr<nsIURI> mCurrentRemoteURI; + + // The current remoteness change which is in a pending state. + RefPtr<PendingRemotenessChange> mPendingRemotenessChange; + + RefPtr<nsSHistory> mSessionHistory; + + // Tab media controller is used to control all media existing in the same + // browsing context tree, so it would only exist in the top level browsing + // context. + RefPtr<MediaController> mTabMediaController; + + RefPtr<net::DocumentLoadListener> mCurrentLoad; + + struct LoadingSessionHistoryEntry { + uint64_t mLoadId = 0; + RefPtr<SessionHistoryEntry> mEntry; + }; + nsTArray<LoadingSessionHistoryEntry> mLoadingEntries; + RefPtr<SessionHistoryEntry> mActiveEntry; + + RefPtr<nsSecureBrowserUI> mSecureBrowserUI; + RefPtr<BrowsingContextWebProgress> mWebProgress; + + nsCOMPtr<nsIWebProgressListener> mDocShellProgressBridge; + RefPtr<nsBrowserStatusFilter> mStatusFilter; + + RefPtr<FeaturePolicy> mContainerFeaturePolicy; + + friend class BrowserSessionStore; + WeakPtr<SessionStoreFormData>& GetSessionStoreFormDataRef() { + return mFormdata; + } + WeakPtr<SessionStoreScrollData>& GetSessionStoreScrollDataRef() { + return mScroll; + } + + WeakPtr<SessionStoreFormData> mFormdata; + WeakPtr<SessionStoreScrollData> mScroll; + + RefPtr<RestoreState> mRestoreState; + + nsCOMPtr<nsITimer> mSessionStoreSessionStorageUpdateTimer; + + // If this is a top level context, this is true if our browser ID is marked as + // active in the process priority manager. + bool mPriorityActive = false; + + // See CanonicalBrowsingContext.forceAppWindowActive. + bool mForceAppWindowActive = false; + + bool mIsReplaced = false; + + // A Promise created when cloning documents for printing. + RefPtr<GenericNonExclusivePromise> mClonePromise; + + JS::Heap<JS::Value> mPermanentKey; + + uint32_t mPendingDiscards = 0; + + bool mFullyDiscarded = false; + + nsTArray<std::function<void(uint64_t)>> mFullyDiscardedListeners; +}; + +} // namespace dom +} // namespace mozilla + +#endif // !defined(mozilla_dom_CanonicalBrowsingContext_h) |