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Diffstat (limited to 'docshell/base/BrowsingContext.h')
| -rw-r--r-- | docshell/base/BrowsingContext.h | 1438 |
1 files changed, 1438 insertions, 0 deletions
diff --git a/docshell/base/BrowsingContext.h b/docshell/base/BrowsingContext.h new file mode 100644 index 0000000000..8d32d0f5a3 --- /dev/null +++ b/docshell/base/BrowsingContext.h @@ -0,0 +1,1438 @@ +/* -*- 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_BrowsingContext_h +#define mozilla_dom_BrowsingContext_h + +#include <tuple> +#include "GVAutoplayRequestUtils.h" +#include "mozilla/ErrorResult.h" +#include "mozilla/HalScreenConfiguration.h" +#include "mozilla/LinkedList.h" +#include "mozilla/Maybe.h" +#include "mozilla/RefPtr.h" +#include "mozilla/Span.h" +#include "mozilla/Tuple.h" +#include "mozilla/dom/BindingDeclarations.h" +#include "mozilla/dom/LocationBase.h" +#include "mozilla/dom/MaybeDiscarded.h" +#include "mozilla/dom/PopupBlocker.h" +#include "mozilla/dom/UserActivation.h" +#include "mozilla/dom/BrowsingContextBinding.h" +#include "mozilla/dom/ScreenOrientationBinding.h" +#include "mozilla/dom/SyncedContext.h" +#include "nsCOMPtr.h" +#include "nsCycleCollectionParticipant.h" +#include "nsIDocShell.h" +#include "nsTArray.h" +#include "nsWrapperCache.h" +#include "nsILoadInfo.h" +#include "nsILoadContext.h" +#include "nsThreadUtils.h" + +class nsDocShellLoadState; +class nsGlobalWindowInner; +class nsGlobalWindowOuter; +class nsIPrincipal; +class nsOuterWindowProxy; +struct nsPoint; +class PickleIterator; + +namespace IPC { +class Message; +class MessageReader; +class MessageWriter; +} // namespace IPC + +namespace mozilla { + +class ErrorResult; +class LogModule; + +namespace ipc { +class IProtocol; + +template <typename T> +struct IPDLParamTraits; +} // namespace ipc + +namespace dom { +class BrowsingContent; +class BrowsingContextGroup; +class CanonicalBrowsingContext; +class ChildSHistory; +class ContentParent; +class Element; +struct LoadingSessionHistoryInfo; +template <typename> +struct Nullable; +template <typename T> +class Sequence; +class SessionHistoryInfo; +class SessionStorageManager; +class StructuredCloneHolder; +class WindowContext; +struct WindowPostMessageOptions; +class WindowProxyHolder; + +enum class ExplicitActiveStatus : uint8_t { + None, + Active, + Inactive, + EndGuard_, +}; + +struct EmbedderColorSchemes { + PrefersColorSchemeOverride mUsed{}; + PrefersColorSchemeOverride mPreferred{}; + + bool operator==(const EmbedderColorSchemes& aOther) const { + return mUsed == aOther.mUsed && mPreferred == aOther.mPreferred; + } + + bool operator!=(const EmbedderColorSchemes& aOther) const { + return !(*this == aOther); + } +}; + +// Fields are, by default, settable by any process and readable by any process. +// Racy sets will be resolved as-if they occurred in the order the parent +// process finds out about them. +// +// The `DidSet` and `CanSet` methods may be overloaded to provide different +// behavior for a specific field. +// * `DidSet` is called to run code in every process whenever the value is +// updated (This currently occurs even if the value didn't change, though +// this may change in the future). +// * `CanSet` is called before attempting to set the value, in both the process +// which calls `Set`, and the parent process, and will kill the misbehaving +// process if it fails. +#define MOZ_EACH_BC_FIELD(FIELD) \ + FIELD(Name, nsString) \ + FIELD(Closed, bool) \ + FIELD(ExplicitActive, ExplicitActiveStatus) \ + /* Top()-only. If true, new-playing media will be suspended when in an \ + * inactive browsing context. */ \ + FIELD(SuspendMediaWhenInactive, bool) \ + /* If true, we're within the nested event loop in window.open, and this \ + * context may not be used as the target of a load */ \ + FIELD(PendingInitialization, bool) \ + /* Indicates if the browser window is active for the purpose of the \ + * :-moz-window-inactive pseudoclass. Only read from or set on the \ + * top BrowsingContext. */ \ + FIELD(IsActiveBrowserWindowInternal, bool) \ + FIELD(OpenerPolicy, nsILoadInfo::CrossOriginOpenerPolicy) \ + /* Current opener for the BrowsingContext. Weak reference */ \ + FIELD(OpenerId, uint64_t) \ + FIELD(OnePermittedSandboxedNavigatorId, uint64_t) \ + /* WindowID of the inner window which embeds this BC */ \ + FIELD(EmbedderInnerWindowId, uint64_t) \ + FIELD(CurrentInnerWindowId, uint64_t) \ + FIELD(HadOriginalOpener, bool) \ + FIELD(IsPopupSpam, bool) \ + /* Hold the audio muted state and should be used on top level browsing \ + * contexts only */ \ + FIELD(Muted, bool) \ + /* Indicate that whether we should delay media playback, which would only \ + be done on an unvisited tab. And this should only be used on the top \ + level browsing contexts */ \ + FIELD(ShouldDelayMediaFromStart, bool) \ + /* See nsSandboxFlags.h for the possible flags. */ \ + FIELD(SandboxFlags, uint32_t) \ + /* The value of SandboxFlags when the BrowsingContext is first created. \ + * Used for sandboxing the initial about:blank document. */ \ + FIELD(InitialSandboxFlags, uint32_t) \ + /* A non-zero unique identifier for the browser element that is hosting \ + * this \ + * BrowsingContext tree. Every BrowsingContext in the element's tree will \ + * return the same ID in all processes and it will remain stable \ + * regardless of process changes. When a browser element's frameloader is \ + * switched to another browser element this ID will remain the same but \ + * hosted under the under the new browser element. */ \ + FIELD(BrowserId, uint64_t) \ + FIELD(HistoryID, nsID) \ + FIELD(InRDMPane, bool) \ + FIELD(Loading, bool) \ + /* A field only set on top browsing contexts, which indicates that either: \ + * \ + * * This is a browsing context created explicitly for printing or print \ + * preview (thus hosting static documents). \ + * \ + * * This is a browsing context where something in this tree is calling \ + * window.print() (and thus showing a modal dialog). \ + * \ + * We use it exclusively to block navigation for both of these cases. */ \ + FIELD(IsPrinting, bool) \ + FIELD(AncestorLoading, bool) \ + FIELD(AllowPlugins, bool) \ + FIELD(AllowContentRetargeting, bool) \ + FIELD(AllowContentRetargetingOnChildren, bool) \ + FIELD(ForceEnableTrackingProtection, bool) \ + FIELD(UseGlobalHistory, bool) \ + FIELD(TargetTopLevelLinkClicksToBlankInternal, bool) \ + FIELD(FullscreenAllowedByOwner, bool) \ + FIELD(ForceDesktopViewport, bool) \ + /* \ + * "is popup" in the spec. \ + * Set only on top browsing contexts. \ + * This doesn't indicate whether this is actually a popup or not, \ + * but whether this browsing context is created by requesting popup or not. \ + * See also: nsWindowWatcher::ShouldOpenPopup. \ + */ \ + FIELD(IsPopupRequested, bool) \ + /* These field are used to store the states of autoplay media request on \ + * GeckoView only, and it would only be modified on the top level browsing \ + * context. */ \ + FIELD(GVAudibleAutoplayRequestStatus, GVAutoplayRequestStatus) \ + FIELD(GVInaudibleAutoplayRequestStatus, GVAutoplayRequestStatus) \ + /* ScreenOrientation-related APIs */ \ + FIELD(CurrentOrientationAngle, float) \ + FIELD(CurrentOrientationType, mozilla::dom::OrientationType) \ + FIELD(OrientationLock, mozilla::hal::ScreenOrientation) \ + FIELD(UserAgentOverride, nsString) \ + FIELD(TouchEventsOverrideInternal, mozilla::dom::TouchEventsOverride) \ + FIELD(EmbedderElementType, Maybe<nsString>) \ + FIELD(MessageManagerGroup, nsString) \ + FIELD(MaxTouchPointsOverride, uint8_t) \ + FIELD(FullZoom, float) \ + FIELD(WatchedByDevToolsInternal, bool) \ + FIELD(TextZoom, float) \ + FIELD(OverrideDPPX, float) \ + /* The current in-progress load. */ \ + FIELD(CurrentLoadIdentifier, Maybe<uint64_t>) \ + /* See nsIRequest for possible flags. */ \ + FIELD(DefaultLoadFlags, uint32_t) \ + /* Signals that session history is enabled for this browsing context tree. \ + * This is only ever set to true on the top BC, so consumers need to get \ + * the value from the top BC! */ \ + FIELD(HasSessionHistory, bool) \ + /* Tracks if this context is the only top-level document in the session \ + * history of the context. */ \ + FIELD(IsSingleToplevelInHistory, bool) \ + FIELD(UseErrorPages, bool) \ + FIELD(PlatformOverride, nsString) \ + /* Specifies if this BC has loaded documents besides the initial \ + * about:blank document. about:privatebrowsing, about:home, about:newtab \ + * and non-initial about:blank are not considered to be initial \ + * documents. */ \ + FIELD(HasLoadedNonInitialDocument, bool) \ + /* Default value for nsIContentViewer::authorStyleDisabled in any new \ + * browsing contexts created as a descendant of this one. Valid only for \ + * top BCs. */ \ + FIELD(AuthorStyleDisabledDefault, bool) \ + FIELD(ServiceWorkersTestingEnabled, bool) \ + FIELD(MediumOverride, nsString) \ + /* DevTools override for prefers-color-scheme */ \ + FIELD(PrefersColorSchemeOverride, dom::PrefersColorSchemeOverride) \ + /* prefers-color-scheme override based on the color-scheme style of our \ + * <browser> embedder element. */ \ + FIELD(EmbedderColorSchemes, EmbedderColorSchemes) \ + FIELD(DisplayMode, dom::DisplayMode) \ + /* The number of entries added to the session history because of this \ + * browsing context. */ \ + FIELD(HistoryEntryCount, uint32_t) \ + /* Don't use the getter of the field, but IsInBFCache() method */ \ + FIELD(IsInBFCache, bool) \ + FIELD(HasRestoreData, bool) \ + FIELD(SessionStoreEpoch, uint32_t) \ + /* Whether we can execute scripts in this BrowsingContext. Has no effect \ + * unless scripts are also allowed in the parent WindowContext. */ \ + FIELD(AllowJavascript, bool) \ + /* The count of request that are used to prevent the browsing context tree \ + * from being suspended, which would ONLY be modified on the top level \ + * context in the chrome process because that's a non-atomic counter */ \ + FIELD(PageAwakeRequestCount, uint32_t) \ + /* This field only gets incrememented when we start navigations in the \ + * parent process. This is used for keeping track of the racing navigations \ + * between the parent and content processes. */ \ + FIELD(ParentInitiatedNavigationEpoch, uint64_t) \ + /* This browsing context is for a synthetic image document wrapping an \ + * image embedded in <object> or <embed>. */ \ + FIELD(SyntheticDocumentContainer, bool) \ + /* If true, this document is embedded within a content document, either \ + * loaded in the parent (e.g. about:addons or the devtools toolbox), or in \ + * a content process. */ \ + FIELD(EmbeddedInContentDocument, bool) + +// BrowsingContext, in this context, is the cross process replicated +// environment in which information about documents is stored. In +// particular the tree structure of nested browsing contexts is +// represented by the tree of BrowsingContexts. +// +// The tree of BrowsingContexts is created in step with its +// corresponding nsDocShell, and when nsDocShells are connected +// through a parent/child relationship, so are BrowsingContexts. The +// major difference is that BrowsingContexts are replicated (synced) +// to the parent process, making it possible to traverse the +// BrowsingContext tree for a tab, in both the parent and the child +// process. +// +// Trees of BrowsingContexts should only ever contain nodes of the +// same BrowsingContext::Type. This is enforced by asserts in the +// BrowsingContext::Create* methods. +class BrowsingContext : public nsILoadContext, public nsWrapperCache { + MOZ_DECL_SYNCED_CONTEXT(BrowsingContext, MOZ_EACH_BC_FIELD) + + public: + enum class Type { Chrome, Content }; + + static void Init(); + static LogModule* GetLog(); + static LogModule* GetSyncLog(); + + // Look up a BrowsingContext in the current process by ID. + static already_AddRefed<BrowsingContext> Get(uint64_t aId); + static already_AddRefed<BrowsingContext> Get(GlobalObject&, uint64_t aId) { + return Get(aId); + } + // Look up the top-level BrowsingContext by BrowserID. + static already_AddRefed<BrowsingContext> GetCurrentTopByBrowserId( + uint64_t aBrowserId); + static already_AddRefed<BrowsingContext> GetCurrentTopByBrowserId( + GlobalObject&, uint64_t aId) { + return GetCurrentTopByBrowserId(aId); + } + + static void UpdateCurrentTopByBrowserId(BrowsingContext* aNewBrowsingContext); + + static already_AddRefed<BrowsingContext> GetFromWindow( + WindowProxyHolder& aProxy); + static already_AddRefed<BrowsingContext> GetFromWindow( + GlobalObject&, WindowProxyHolder& aProxy) { + return GetFromWindow(aProxy); + } + + static void DiscardFromContentParent(ContentParent* aCP); + + // Create a brand-new toplevel BrowsingContext with no relationships to other + // BrowsingContexts, and which is not embedded within any <browser> or frame + // element. + // + // This BrowsingContext is immediately attached, and cannot have LoadContext + // flags customized unless it is of `Type::Chrome`. + // + // The process which created this BrowsingContext is responsible for detaching + // it. + static already_AddRefed<BrowsingContext> CreateIndependent(Type aType); + + // Create a brand-new BrowsingContext object, but does not immediately attach + // it. State such as OriginAttributes and PrivateBrowsingId may be customized + // to configure the BrowsingContext before it is attached. + // + // `EnsureAttached()` must be called before the BrowsingContext is used for a + // DocShell, BrowserParent, or BrowserBridgeChild. + static already_AddRefed<BrowsingContext> CreateDetached( + nsGlobalWindowInner* aParent, BrowsingContext* aOpener, + BrowsingContextGroup* aSpecificGroup, const nsAString& aName, Type aType, + bool aIsPopupRequested, bool aCreatedDynamically = false); + + void EnsureAttached(); + + bool EverAttached() const { return mEverAttached; } + + // Cast this object to a canonical browsing context, and return it. + CanonicalBrowsingContext* Canonical(); + + // Is the most recent Document in this BrowsingContext loaded within this + // process? This may be true with a null mDocShell after the Window has been + // closed. + bool IsInProcess() const { return mIsInProcess; } + + bool IsOwnedByProcess() const; + + bool CanHaveRemoteOuterProxies() const { + return !mIsInProcess || mDanglingRemoteOuterProxies; + } + + // Has this BrowsingContext been discarded. A discarded browsing context has + // been destroyed, and may not be available on the other side of an IPC + // message. + bool IsDiscarded() const { return mIsDiscarded; } + + // Returns true if none of the BrowsingContext's ancestor BrowsingContexts or + // WindowContexts are discarded or cached. + bool AncestorsAreCurrent() const; + + bool Windowless() const { return mWindowless; } + + // Get the DocShell for this BrowsingContext if it is in-process, or + // null if it's not. + nsIDocShell* GetDocShell() const { return mDocShell; } + void SetDocShell(nsIDocShell* aDocShell); + void ClearDocShell() { mDocShell = nullptr; } + + // Get the Document for this BrowsingContext if it is in-process, or + // null if it's not. + Document* GetDocument() const { + return mDocShell ? mDocShell->GetDocument() : nullptr; + } + Document* GetExtantDocument() const { + return mDocShell ? mDocShell->GetExtantDocument() : nullptr; + } + + // This cleans up remote outer window proxies that might have been left behind + // when the browsing context went from being remote to local. It does this by + // turning them into cross-compartment wrappers to aOuter. If there is already + // a remote proxy in the compartment of aOuter, then aOuter will get swapped + // to it and the value of aOuter will be set to the object that used to be the + // remote proxy and is now an OuterWindowProxy. + void CleanUpDanglingRemoteOuterWindowProxies( + JSContext* aCx, JS::MutableHandle<JSObject*> aOuter); + + // Get the embedder element for this BrowsingContext if the embedder is + // in-process, or null if it's not. + Element* GetEmbedderElement() const { return mEmbedderElement; } + void SetEmbedderElement(Element* aEmbedder); + + // Return true if the type of the embedder element is either object + // or embed, false otherwise. + bool IsEmbedderTypeObjectOrEmbed(); + + // Called after the BrowingContext has been embedded in a FrameLoader. This + // happens after `SetEmbedderElement` is called on the BrowsingContext and + // after the BrowsingContext has been set on the FrameLoader. + void Embed(); + + // Get the outer window object for this BrowsingContext if it is in-process + // and still has a docshell, or null otherwise. + nsPIDOMWindowOuter* GetDOMWindow() const { + return mDocShell ? mDocShell->GetWindow() : nullptr; + } + + uint64_t GetRequestContextId() const { return mRequestContextId; } + + // Detach the current BrowsingContext from its parent, in both the + // child and the parent process. + void Detach(bool aFromIPC = false); + + // Prepare this BrowsingContext to leave the current process. + void PrepareForProcessChange(); + + // Triggers a load in the process which currently owns this BrowsingContext. + nsresult LoadURI(nsDocShellLoadState* aLoadState, + bool aSetNavigating = false); + + nsresult InternalLoad(nsDocShellLoadState* aLoadState); + + // Removes the root document for this BrowsingContext tree from the BFCache, + // if it is cached, and returns true if it was. + bool RemoveRootFromBFCacheSync(); + + // If the load state includes a source BrowsingContext has been passed, check + // to see if we are sandboxed from it as the result of an iframe or CSP + // sandbox. + nsresult CheckSandboxFlags(nsDocShellLoadState* aLoadState); + + void DisplayLoadError(const nsAString& aURI); + + // Check that this browsing context is targetable for navigations (i.e. that + // it is neither closed, cached, nor discarded). + bool IsTargetable() const; + + // True if this browsing context is inactive and is able to be suspended. + bool InactiveForSuspend() const; + + const nsString& Name() const { return GetName(); } + void GetName(nsAString& aName) { aName = GetName(); } + bool NameEquals(const nsAString& aName) { return GetName().Equals(aName); } + + Type GetType() const { return mType; } + bool IsContent() const { return mType == Type::Content; } + bool IsChrome() const { return !IsContent(); } + + bool IsTop() const { return !GetParent(); } + bool IsSubframe() const { return !IsTop(); } + + bool IsTopContent() const { return IsContent() && IsTop(); } + + bool IsInSubtreeOf(BrowsingContext* aContext); + + bool IsContentSubframe() const { return IsContent() && IsSubframe(); } + + // non-zero + uint64_t Id() const { return mBrowsingContextId; } + + BrowsingContext* GetParent() const; + BrowsingContext* Top(); + const BrowsingContext* Top() const; + + int32_t IndexOf(BrowsingContext* aChild); + + // NOTE: Unlike `GetEmbedderWindowGlobal`, `GetParentWindowContext` does not + // cross toplevel content browser boundaries. + WindowContext* GetParentWindowContext() const { return mParentWindow; } + WindowContext* GetTopWindowContext() const; + + already_AddRefed<BrowsingContext> GetOpener() const { + RefPtr<BrowsingContext> opener(Get(GetOpenerId())); + if (!mIsDiscarded && opener && !opener->mIsDiscarded) { + MOZ_DIAGNOSTIC_ASSERT(opener->mType == mType); + return opener.forget(); + } + return nullptr; + } + void SetOpener(BrowsingContext* aOpener) { + MOZ_DIAGNOSTIC_ASSERT(!aOpener || aOpener->Group() == Group()); + MOZ_DIAGNOSTIC_ASSERT(!aOpener || aOpener->mType == mType); + + MOZ_ALWAYS_SUCCEEDS(SetOpenerId(aOpener ? aOpener->Id() : 0)); + } + + bool HasOpener() const; + + bool HadOriginalOpener() const { return GetHadOriginalOpener(); } + + // Returns true if the browsing context and top context are same origin + bool SameOriginWithTop(); + + /** + * When a new browsing context is opened by a sandboxed document, it needs to + * keep track of the browsing context that opened it, so that it can be + * navigated by it. This is the "one permitted sandboxed navigator". + */ + already_AddRefed<BrowsingContext> GetOnePermittedSandboxedNavigator() const { + return Get(GetOnePermittedSandboxedNavigatorId()); + } + [[nodiscard]] nsresult SetOnePermittedSandboxedNavigator( + BrowsingContext* aNavigator) { + if (GetOnePermittedSandboxedNavigatorId()) { + MOZ_ASSERT(false, + "One Permitted Sandboxed Navigator should only be set once."); + return NS_ERROR_FAILURE; + } else { + return SetOnePermittedSandboxedNavigatorId(aNavigator ? aNavigator->Id() + : 0); + } + } + + uint32_t SandboxFlags() const { return GetSandboxFlags(); } + + Span<RefPtr<BrowsingContext>> Children() const; + void GetChildren(nsTArray<RefPtr<BrowsingContext>>& aChildren); + + Span<RefPtr<BrowsingContext>> NonSyntheticChildren() const; + + const nsTArray<RefPtr<WindowContext>>& GetWindowContexts() { + return mWindowContexts; + } + void GetWindowContexts(nsTArray<RefPtr<WindowContext>>& aWindows); + + void RegisterWindowContext(WindowContext* aWindow); + void UnregisterWindowContext(WindowContext* aWindow); + WindowContext* GetCurrentWindowContext() const { + return mCurrentWindowContext; + } + + // Helpers to traverse this BrowsingContext subtree. Note that these will only + // traverse active contexts, and will ignore ones in the BFCache. + enum class WalkFlag { + Next, + Skip, + Stop, + }; + + /** + * Walk the browsing context tree in pre-order and call `aCallback` + * for every node in the tree. PreOrderWalk accepts two types of + * callbacks, either of the type `void(BrowsingContext*)` or + * `WalkFlag(BrowsingContext*)`. The former traverses the entire + * tree, but the latter let's you control if a sub-tree should be + * skipped by returning `WalkFlag::Skip`, completely abort traversal + * by returning `WalkFlag::Stop` or continue as normal with + * `WalkFlag::Next`. + */ + template <typename F> + void PreOrderWalk(F&& aCallback) { + if constexpr (std::is_void_v< + typename std::invoke_result_t<F, BrowsingContext*>>) { + PreOrderWalkVoid(std::forward<F>(aCallback)); + } else { + PreOrderWalkFlag(std::forward<F>(aCallback)); + } + } + + void PreOrderWalkVoid(const std::function<void(BrowsingContext*)>& aCallback); + WalkFlag PreOrderWalkFlag( + const std::function<WalkFlag(BrowsingContext*)>& aCallback); + + void PostOrderWalk(const std::function<void(BrowsingContext*)>& aCallback); + + void GetAllBrowsingContextsInSubtree( + nsTArray<RefPtr<BrowsingContext>>& aBrowsingContexts); + + BrowsingContextGroup* Group() { return mGroup; } + + // WebIDL bindings for nsILoadContext + Nullable<WindowProxyHolder> GetAssociatedWindow(); + Nullable<WindowProxyHolder> GetTopWindow(); + Element* GetTopFrameElement(); + bool GetIsContent() { return IsContent(); } + void SetUsePrivateBrowsing(bool aUsePrivateBrowsing, ErrorResult& aError); + // Needs a different name to disambiguate from the xpidl method with + // the same signature but different return value. + void SetUseTrackingProtectionWebIDL(bool aUseTrackingProtection, + ErrorResult& aRv); + bool UseTrackingProtectionWebIDL() { return UseTrackingProtection(); } + void GetOriginAttributes(JSContext* aCx, JS::MutableHandle<JS::Value> aVal, + ErrorResult& aError); + + bool InRDMPane() const { return GetInRDMPane(); } + + bool WatchedByDevTools(); + void SetWatchedByDevTools(bool aWatchedByDevTools, ErrorResult& aRv); + + dom::TouchEventsOverride TouchEventsOverride() const; + bool TargetTopLevelLinkClicksToBlank() const; + + bool FullscreenAllowed() const; + + float FullZoom() const { return GetFullZoom(); } + float TextZoom() const { return GetTextZoom(); } + + float OverrideDPPX() const { return Top()->GetOverrideDPPX(); } + + bool SuspendMediaWhenInactive() const { + return GetSuspendMediaWhenInactive(); + } + + bool IsActive() const; + void SetIsActive(bool aIsActive, mozilla::ErrorResult& aRv) { + SetExplicitActive(aIsActive ? ExplicitActiveStatus::Active + : ExplicitActiveStatus::Inactive, + aRv); + } + + bool ForceDesktopViewport() const { return GetForceDesktopViewport(); } + + bool AuthorStyleDisabledDefault() const { + return GetAuthorStyleDisabledDefault(); + } + + bool UseGlobalHistory() const { return GetUseGlobalHistory(); } + + bool GetIsActiveBrowserWindow(); + + void SetIsActiveBrowserWindow(bool aActive); + + uint64_t BrowserId() const { return GetBrowserId(); } + + bool IsLoading(); + + void GetEmbedderElementType(nsString& aElementType) { + if (GetEmbedderElementType().isSome()) { + aElementType = GetEmbedderElementType().value(); + } + } + + bool IsLoadingIdentifier(uint64_t aLoadIdentifer) { + if (GetCurrentLoadIdentifier() && + *GetCurrentLoadIdentifier() == aLoadIdentifer) { + return true; + } + return false; + } + + // ScreenOrientation related APIs + [[nodiscard]] nsresult SetCurrentOrientation(OrientationType aType, + float aAngle) { + Transaction txn; + txn.SetCurrentOrientationType(aType); + txn.SetCurrentOrientationAngle(aAngle); + return txn.Commit(this); + } + + void SetRDMPaneOrientation(OrientationType aType, float aAngle, + ErrorResult& aRv) { + if (InRDMPane()) { + if (NS_FAILED(SetCurrentOrientation(aType, aAngle))) { + aRv.ThrowInvalidStateError("Browsing context is discarded"); + } + } + } + + void SetRDMPaneMaxTouchPoints(uint8_t aMaxTouchPoints, ErrorResult& aRv) { + if (InRDMPane()) { + SetMaxTouchPointsOverride(aMaxTouchPoints, aRv); + } + } + + // Using the rules for choosing a browsing context we try to find + // the browsing context with the given name in the set of + // transitively reachable browsing contexts. Performs access control + // checks with regard to this. + // See + // https://html.spec.whatwg.org/multipage/browsers.html#the-rules-for-choosing-a-browsing-context-given-a-browsing-context-name. + // + // BrowsingContext::FindWithName(const nsAString&) is equivalent to + // calling nsIDocShellTreeItem::FindItemWithName(aName, nullptr, + // nullptr, false, <return value>). + BrowsingContext* FindWithName(const nsAString& aName, + bool aUseEntryGlobalForAccessCheck = true); + + // Find a browsing context in this context's list of + // children. Doesn't consider the special names, '_self', '_parent', + // '_top', or '_blank'. Performs access control checks with regard to + // 'this'. + BrowsingContext* FindChildWithName(const nsAString& aName, + BrowsingContext& aRequestingContext); + + // Find a browsing context in the subtree rooted at 'this' Doesn't + // consider the special names, '_self', '_parent', '_top', or + // '_blank'. Performs access control checks with regard to + // 'aRequestingContext'. + BrowsingContext* FindWithNameInSubtree(const nsAString& aName, + BrowsingContext& aRequestingContext); + + nsISupports* GetParentObject() const; + JSObject* WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + // Return the window proxy object that corresponds to this browsing context. + inline JSObject* GetWindowProxy() const { return mWindowProxy; } + inline JSObject* GetUnbarrieredWindowProxy() const { + return mWindowProxy.unbarrieredGet(); + } + + // Set the window proxy object that corresponds to this browsing context. + void SetWindowProxy(JS::Handle<JSObject*> aWindowProxy) { + mWindowProxy = aWindowProxy; + } + + Nullable<WindowProxyHolder> GetWindow(); + + NS_DECL_CYCLE_COLLECTING_ISUPPORTS + NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS(BrowsingContext) + NS_DECL_NSILOADCONTEXT + + // Window APIs that are cross-origin-accessible (from the HTML spec). + WindowProxyHolder Window(); + BrowsingContext* GetBrowsingContext() { return this; }; + BrowsingContext* Self() { return this; } + void Location(JSContext* aCx, JS::MutableHandle<JSObject*> aLocation, + ErrorResult& aError); + void Close(CallerType aCallerType, ErrorResult& aError); + bool GetClosed(ErrorResult&) { return GetClosed(); } + void Focus(CallerType aCallerType, ErrorResult& aError); + void Blur(CallerType aCallerType, ErrorResult& aError); + WindowProxyHolder GetFrames(ErrorResult& aError); + int32_t Length() const { return Children().Length(); } + Nullable<WindowProxyHolder> GetTop(ErrorResult& aError); + void GetOpener(JSContext* aCx, JS::MutableHandle<JS::Value> aOpener, + ErrorResult& aError) const; + Nullable<WindowProxyHolder> GetParent(ErrorResult& aError); + void PostMessageMoz(JSContext* aCx, JS::Handle<JS::Value> aMessage, + const nsAString& aTargetOrigin, + const Sequence<JSObject*>& aTransfer, + nsIPrincipal& aSubjectPrincipal, ErrorResult& aError); + void PostMessageMoz(JSContext* aCx, JS::Handle<JS::Value> aMessage, + const WindowPostMessageOptions& aOptions, + nsIPrincipal& aSubjectPrincipal, ErrorResult& aError); + + void GetCustomUserAgent(nsAString& aUserAgent) { + aUserAgent = Top()->GetUserAgentOverride(); + } + nsresult SetCustomUserAgent(const nsAString& aUserAgent); + void SetCustomUserAgent(const nsAString& aUserAgent, ErrorResult& aRv); + + void GetCustomPlatform(nsAString& aPlatform) { + aPlatform = Top()->GetPlatformOverride(); + } + void SetCustomPlatform(const nsAString& aPlatform, ErrorResult& aRv); + + JSObject* WrapObject(JSContext* aCx); + + static JSObject* ReadStructuredClone(JSContext* aCx, + JSStructuredCloneReader* aReader, + StructuredCloneHolder* aHolder); + bool WriteStructuredClone(JSContext* aCx, JSStructuredCloneWriter* aWriter, + StructuredCloneHolder* aHolder); + + void StartDelayedAutoplayMediaComponents(); + + [[nodiscard]] nsresult ResetGVAutoplayRequestStatus(); + + /** + * Information required to initialize a BrowsingContext in another process. + * This object may be serialized over IPC. + */ + struct IPCInitializer { + uint64_t mId = 0; + + // IDs are used for Parent and Opener to allow for this object to be + // deserialized before other BrowsingContext in the BrowsingContextGroup + // have been initialized. + uint64_t mParentId = 0; + already_AddRefed<WindowContext> GetParent(); + already_AddRefed<BrowsingContext> GetOpener(); + + uint64_t GetOpenerId() const { return mFields.mOpenerId; } + + bool mWindowless = false; + bool mUseRemoteTabs = false; + bool mUseRemoteSubframes = false; + bool mCreatedDynamically = false; + int32_t mChildOffset = 0; + int32_t mSessionHistoryIndex = -1; + int32_t mSessionHistoryCount = 0; + OriginAttributes mOriginAttributes; + uint64_t mRequestContextId = 0; + + FieldValues mFields; + }; + + // Create an IPCInitializer object for this BrowsingContext. + IPCInitializer GetIPCInitializer(); + + // Create a BrowsingContext object from over IPC. + static void CreateFromIPC(IPCInitializer&& aInitializer, + BrowsingContextGroup* aGroup, + ContentParent* aOriginProcess); + + // Performs access control to check that 'this' can access 'aTarget'. + bool CanAccess(BrowsingContext* aTarget, bool aConsiderOpener = true); + + bool IsSandboxedFrom(BrowsingContext* aTarget); + + // The runnable will be called once there is idle time, or the top level + // page has been loaded or if a timeout has fired. + // Must be called only on the top level BrowsingContext. + void AddDeprioritizedLoadRunner(nsIRunnable* aRunner); + + RefPtr<SessionStorageManager> GetSessionStorageManager(); + + // Set PendingInitialization on this BrowsingContext before the context has + // been attached. + void InitPendingInitialization(bool aPendingInitialization) { + MOZ_ASSERT(!EverAttached()); + mFields.SetWithoutSyncing<IDX_PendingInitialization>( + aPendingInitialization); + } + + bool CreatedDynamically() const { return mCreatedDynamically; } + + // Returns true if this browsing context, or any ancestor to this browsing + // context was created dynamically. See also `CreatedDynamically`. + bool IsDynamic() const; + + int32_t ChildOffset() const { return mChildOffset; } + + bool GetOffsetPath(nsTArray<uint32_t>& aPath) const; + + const OriginAttributes& OriginAttributesRef() { return mOriginAttributes; } + nsresult SetOriginAttributes(const OriginAttributes& aAttrs); + + void GetHistoryID(JSContext* aCx, JS::MutableHandle<JS::Value> aVal, + ErrorResult& aError); + + // This should only be called on the top browsing context. + void InitSessionHistory(); + + // This will only ever return a non-null value if called on the top browsing + // context. + ChildSHistory* GetChildSessionHistory(); + + bool CrossOriginIsolated(); + + // Check if it is allowed to open a popup from the current browsing + // context or any of its ancestors. + bool IsPopupAllowed(); + + // aCurrentURI is only required to be non-null if the load type contains the + // nsIWebNavigation::LOAD_FLAGS_IS_REFRESH flag and aInfo is for a refresh to + // the current URI. + void SessionHistoryCommit(const LoadingSessionHistoryInfo& aInfo, + uint32_t aLoadType, nsIURI* aCurrentURI, + bool aHadActiveEntry, bool aPersist, + bool aCloneEntryChildren, bool aChannelExpired, + uint32_t aCacheKey); + + // Set a new active entry on this browsing context. This is used for + // implementing history.pushState/replaceState and same document navigations. + // The new active entry will be linked to the current active entry through + // its shared state. + // aPreviousScrollPos is the scroll position that needs to be saved on the + // previous active entry. + // aUpdatedCacheKey is the cache key to set on the new active entry. If + // aUpdatedCacheKey is 0 then it will be ignored. + void SetActiveSessionHistoryEntry(const Maybe<nsPoint>& aPreviousScrollPos, + SessionHistoryInfo* aInfo, + uint32_t aLoadType, + uint32_t aUpdatedCacheKey, + bool aUpdateLength = true); + + // Replace the active entry for this browsing context. This is used for + // implementing history.replaceState and same document navigations. + void ReplaceActiveSessionHistoryEntry(SessionHistoryInfo* aInfo); + + // Removes dynamic child entries of the active entry. + void RemoveDynEntriesFromActiveSessionHistoryEntry(); + + // Removes entries corresponding to this BrowsingContext from session history. + void RemoveFromSessionHistory(const nsID& aChangeID); + + void SetTriggeringAndInheritPrincipals(nsIPrincipal* aTriggeringPrincipal, + nsIPrincipal* aPrincipalToInherit, + uint64_t aLoadIdentifier); + + // Return mTriggeringPrincipal and mPrincipalToInherit if the load id + // saved with the principal matches the current load identifier of this BC. + Tuple<nsCOMPtr<nsIPrincipal>, nsCOMPtr<nsIPrincipal>> + GetTriggeringAndInheritPrincipalsForCurrentLoad(); + + void HistoryGo(int32_t aOffset, uint64_t aHistoryEpoch, + bool aRequireUserInteraction, bool aUserActivation, + std::function<void(Maybe<int32_t>&&)>&& aResolver); + + bool ShouldUpdateSessionHistory(uint32_t aLoadType); + + // Checks if we reached the rate limit for calls to Location and History API. + // The rate limit is controlled by the + // "dom.navigation.locationChangeRateLimit" prefs. + // Rate limit applies per BrowsingContext. + // Returns NS_OK if we are below the rate limit and increments the counter. + // Returns NS_ERROR_DOM_SECURITY_ERR if limit is reached. + nsresult CheckLocationChangeRateLimit(CallerType aCallerType); + + void ResetLocationChangeRateLimit(); + + mozilla::dom::DisplayMode DisplayMode() { return Top()->GetDisplayMode(); } + + // Returns canFocus, isActive + std::tuple<bool, bool> CanFocusCheck(CallerType aCallerType); + + bool CanBlurCheck(CallerType aCallerType); + + PopupBlocker::PopupControlState RevisePopupAbuseLevel( + PopupBlocker::PopupControlState aControl); + + void IncrementHistoryEntryCountForBrowsingContext(); + + bool ServiceWorkersTestingEnabled() const { + return GetServiceWorkersTestingEnabled(); + } + + void GetMediumOverride(nsAString& aOverride) const { + aOverride = GetMediumOverride(); + } + + dom::PrefersColorSchemeOverride PrefersColorSchemeOverride() const { + return GetPrefersColorSchemeOverride(); + } + + bool IsInBFCache() const; + + bool AllowJavascript() const { return GetAllowJavascript(); } + bool CanExecuteScripts() const { return mCanExecuteScripts; } + + uint32_t DefaultLoadFlags() const { return GetDefaultLoadFlags(); } + + // 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 RequestForPageAwake(); + void RevokeForPageAwake(); + + void AddDiscardListener(std::function<void(uint64_t)>&& aListener); + + protected: + virtual ~BrowsingContext(); + BrowsingContext(WindowContext* aParentWindow, BrowsingContextGroup* aGroup, + uint64_t aBrowsingContextId, Type aType, FieldValues&& aInit); + + void SetChildSHistory(ChildSHistory* aChildSHistory); + already_AddRefed<ChildSHistory> ForgetChildSHistory() { + // FIXME Do we need to unset mHasSessionHistory? + return mChildSessionHistory.forget(); + } + + static bool ShouldAddEntryForRefresh(nsIURI* aCurrentURI, + const SessionHistoryInfo& aInfo); + static bool ShouldAddEntryForRefresh(nsIURI* aCurrentURI, nsIURI* aNewURI, + bool aHasPostData); + + private: + void Attach(bool aFromIPC, ContentParent* aOriginProcess); + + // Recomputes whether we can execute scripts in this BrowsingContext based on + // the value of AllowJavascript() and whether scripts are allowed in the + // parent WindowContext. Called whenever the AllowJavascript() flag or the + // parent WC changes. + void RecomputeCanExecuteScripts(); + + // Find the special browsing context if aName is '_self', '_parent', + // '_top', but not '_blank'. The latter is handled in FindWithName + BrowsingContext* FindWithSpecialName(const nsAString& aName, + BrowsingContext& aRequestingContext); + + // Is it early enough in the BrowsingContext's lifecycle that it is still + // OK to set OriginAttributes? + bool CanSetOriginAttributes(); + + void AssertOriginAttributesMatchPrivateBrowsing(); + + // Assert that the BrowsingContext's LoadContext flags appear coherent + // relative to related BrowsingContexts. + void AssertCoherentLoadContext(); + + friend class ::nsOuterWindowProxy; + friend class ::nsGlobalWindowOuter; + friend class WindowContext; + + // Update the window proxy object that corresponds to this browsing context. + // This should be called from the window proxy object's objectMoved hook, if + // the object mWindowProxy points to was moved by the JS GC. + void UpdateWindowProxy(JSObject* obj, JSObject* old) { + if (mWindowProxy) { + MOZ_ASSERT(mWindowProxy == old); + mWindowProxy = obj; + } + } + // Clear the window proxy object that corresponds to this browsing context. + // This should be called if the window proxy object is finalized, or it can't + // reach its browsing context anymore. + void ClearWindowProxy() { mWindowProxy = nullptr; } + + friend class Location; + friend class RemoteLocationProxy; + /** + * LocationProxy is the class for the native object stored as a private in a + * RemoteLocationProxy proxy representing a Location object in a different + * process. It forwards all operations to its BrowsingContext and aggregates + * its refcount to that BrowsingContext. + */ + class LocationProxy final : public LocationBase { + public: + MozExternalRefCountType AddRef() { return GetBrowsingContext()->AddRef(); } + MozExternalRefCountType Release() { + return GetBrowsingContext()->Release(); + } + + protected: + friend class RemoteLocationProxy; + BrowsingContext* GetBrowsingContext() override { + return reinterpret_cast<BrowsingContext*>( + uintptr_t(this) - offsetof(BrowsingContext, mLocation)); + } + + already_AddRefed<nsIDocShell> GetDocShell() override { return nullptr; } + }; + + // Send a given `BaseTransaction` object to the correct remote. + void SendCommitTransaction(ContentParent* aParent, + const BaseTransaction& aTxn, uint64_t aEpoch); + void SendCommitTransaction(ContentChild* aChild, const BaseTransaction& aTxn, + uint64_t aEpoch); + + bool CanSet(FieldIndex<IDX_SessionStoreEpoch>, uint32_t aEpoch, + ContentParent* aSource) { + return IsTop() && !aSource; + } + + void DidSet(FieldIndex<IDX_SessionStoreEpoch>, uint32_t aOldValue); + + using CanSetResult = syncedcontext::CanSetResult; + + // Ensure that opener is in the same BrowsingContextGroup. + bool CanSet(FieldIndex<IDX_OpenerId>, const uint64_t& aValue, + ContentParent* aSource) { + if (aValue != 0) { + RefPtr<BrowsingContext> opener = Get(aValue); + return opener && opener->Group() == Group(); + } + return true; + } + + bool CanSet(FieldIndex<IDX_OpenerPolicy>, + nsILoadInfo::CrossOriginOpenerPolicy, ContentParent*); + + bool CanSet(FieldIndex<IDX_ServiceWorkersTestingEnabled>, bool, + ContentParent*) { + return IsTop(); + } + + bool CanSet(FieldIndex<IDX_MediumOverride>, const nsString&, ContentParent*) { + return IsTop(); + } + + bool CanSet(FieldIndex<IDX_EmbedderColorSchemes>, const EmbedderColorSchemes&, + ContentParent* aSource) { + return CheckOnlyEmbedderCanSet(aSource); + } + + bool CanSet(FieldIndex<IDX_PrefersColorSchemeOverride>, + dom::PrefersColorSchemeOverride, ContentParent*) { + return IsTop(); + } + + void DidSet(FieldIndex<IDX_InRDMPane>, bool aOldValue); + + void DidSet(FieldIndex<IDX_EmbedderColorSchemes>, + EmbedderColorSchemes&& aOldValue); + + void DidSet(FieldIndex<IDX_PrefersColorSchemeOverride>, + dom::PrefersColorSchemeOverride aOldValue); + + void PresContextAffectingFieldChanged(); + + void DidSet(FieldIndex<IDX_MediumOverride>, nsString&& aOldValue); + + bool CanSet(FieldIndex<IDX_SuspendMediaWhenInactive>, bool, ContentParent*) { + return IsTop(); + } + + bool CanSet(FieldIndex<IDX_TouchEventsOverrideInternal>, + dom::TouchEventsOverride aTouchEventsOverride, + ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_DisplayMode>, const enum DisplayMode& aDisplayMode, + ContentParent* aSource) { + return IsTop(); + } + + void DidSet(FieldIndex<IDX_DisplayMode>, enum DisplayMode aOldValue); + + void DidSet(FieldIndex<IDX_ExplicitActive>, ExplicitActiveStatus aOldValue); + + bool CanSet(FieldIndex<IDX_IsActiveBrowserWindowInternal>, const bool& aValue, + ContentParent* aSource); + void DidSet(FieldIndex<IDX_IsActiveBrowserWindowInternal>, bool aOldValue); + + // Ensure that we only set the flag on the top level browsingContext. + // And then, we do a pre-order walk in the tree to refresh the + // volume of all media elements. + void DidSet(FieldIndex<IDX_Muted>); + + bool CanSet(FieldIndex<IDX_ShouldDelayMediaFromStart>, const bool& aValue, + ContentParent* aSource); + void DidSet(FieldIndex<IDX_ShouldDelayMediaFromStart>, bool aOldValue); + + bool CanSet(FieldIndex<IDX_OverrideDPPX>, const float& aValue, + ContentParent* aSource); + void DidSet(FieldIndex<IDX_OverrideDPPX>, float aOldValue); + + bool CanSet(FieldIndex<IDX_EmbedderInnerWindowId>, const uint64_t& aValue, + ContentParent* aSource); + + CanSetResult CanSet(FieldIndex<IDX_CurrentInnerWindowId>, + const uint64_t& aValue, ContentParent* aSource); + + void DidSet(FieldIndex<IDX_CurrentInnerWindowId>); + + bool CanSet(FieldIndex<IDX_ParentInitiatedNavigationEpoch>, + const uint64_t& aValue, ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_IsPopupSpam>, const bool& aValue, + ContentParent* aSource); + + void DidSet(FieldIndex<IDX_IsPopupSpam>); + + void DidSet(FieldIndex<IDX_GVAudibleAutoplayRequestStatus>); + void DidSet(FieldIndex<IDX_GVInaudibleAutoplayRequestStatus>); + + void DidSet(FieldIndex<IDX_Loading>); + + void DidSet(FieldIndex<IDX_AncestorLoading>); + + void DidSet(FieldIndex<IDX_PlatformOverride>); + CanSetResult CanSet(FieldIndex<IDX_PlatformOverride>, + const nsString& aPlatformOverride, + ContentParent* aSource); + + void DidSet(FieldIndex<IDX_UserAgentOverride>); + CanSetResult CanSet(FieldIndex<IDX_UserAgentOverride>, + const nsString& aUserAgent, ContentParent* aSource); + bool CanSet(FieldIndex<IDX_OrientationLock>, + const mozilla::hal::ScreenOrientation& aOrientationLock, + ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_EmbedderElementType>, + const Maybe<nsString>& aInitiatorType, ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_MessageManagerGroup>, + const nsString& aMessageManagerGroup, ContentParent* aSource); + + CanSetResult CanSet(FieldIndex<IDX_AllowContentRetargeting>, + const bool& aAllowContentRetargeting, + ContentParent* aSource); + CanSetResult CanSet(FieldIndex<IDX_AllowContentRetargetingOnChildren>, + const bool& aAllowContentRetargetingOnChildren, + ContentParent* aSource); + CanSetResult CanSet(FieldIndex<IDX_AllowPlugins>, const bool& aAllowPlugins, + ContentParent* aSource); + bool CanSet(FieldIndex<IDX_FullscreenAllowedByOwner>, const bool&, + ContentParent*); + bool CanSet(FieldIndex<IDX_WatchedByDevToolsInternal>, + const bool& aWatchedByDevToolsInternal, ContentParent* aSource); + + CanSetResult CanSet(FieldIndex<IDX_DefaultLoadFlags>, + const uint32_t& aDefaultLoadFlags, + ContentParent* aSource); + void DidSet(FieldIndex<IDX_DefaultLoadFlags>); + + bool CanSet(FieldIndex<IDX_UseGlobalHistory>, const bool& aUseGlobalHistory, + ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_TargetTopLevelLinkClicksToBlankInternal>, + const bool& aTargetTopLevelLinkClicksToBlankInternal, + ContentParent* aSource); + + void DidSet(FieldIndex<IDX_HasSessionHistory>, bool aOldValue); + + bool CanSet(FieldIndex<IDX_BrowserId>, const uint32_t& aValue, + ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_UseErrorPages>, const bool& aUseErrorPages, + ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_PendingInitialization>, bool aNewValue, + ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_PageAwakeRequestCount>, uint32_t aNewValue, + ContentParent* aSource); + void DidSet(FieldIndex<IDX_PageAwakeRequestCount>, uint32_t aOldValue); + + CanSetResult CanSet(FieldIndex<IDX_AllowJavascript>, bool aValue, + ContentParent* aSource); + void DidSet(FieldIndex<IDX_AllowJavascript>, bool aOldValue); + + bool CanSet(FieldIndex<IDX_ForceDesktopViewport>, bool aValue, + ContentParent* aSource) { + return IsTop() && XRE_IsParentProcess(); + } + + // TODO(emilio): Maybe handle the flag being set dynamically without + // navigating? The previous code didn't do it tho, and a reload is probably + // worth it regardless. + // void DidSet(FieldIndex<IDX_ForceDesktopViewport>, bool aOldValue); + + bool CanSet(FieldIndex<IDX_HasRestoreData>, bool aNewValue, + ContentParent* aSource); + + bool CanSet(FieldIndex<IDX_EmbeddedInContentDocument>, bool, + ContentParent* aSource) { + return CheckOnlyEmbedderCanSet(aSource); + } + + template <size_t I, typename T> + bool CanSet(FieldIndex<I>, const T&, ContentParent*) { + return true; + } + + // Overload `DidSet` to get notifications for a particular field being set. + // + // You can also overload the variant that gets the old value if you need it. + template <size_t I> + void DidSet(FieldIndex<I>) {} + template <size_t I, typename T> + void DidSet(FieldIndex<I>, T&& aOldValue) {} + + void DidSet(FieldIndex<IDX_FullZoom>, float aOldValue); + void DidSet(FieldIndex<IDX_TextZoom>, float aOldValue); + void DidSet(FieldIndex<IDX_AuthorStyleDisabledDefault>); + + bool CanSet(FieldIndex<IDX_IsInBFCache>, bool, ContentParent* aSource); + void DidSet(FieldIndex<IDX_IsInBFCache>); + + void DidSet(FieldIndex<IDX_SyntheticDocumentContainer>); + + // Allow if the process attemping to set field is the same as the owning + // process. Deprecated. New code that might use this should generally be moved + // to WindowContext or be settable only by the parent process. + CanSetResult LegacyRevertIfNotOwningOrParentProcess(ContentParent* aSource); + + // True if the process attempting to set field is the same as the embedder's + // process. + bool CheckOnlyEmbedderCanSet(ContentParent* aSource); + + void CreateChildSHistory(); + + using PrincipalWithLoadIdentifierTuple = + Tuple<nsCOMPtr<nsIPrincipal>, uint64_t>; + + nsIPrincipal* GetSavedPrincipal( + Maybe<PrincipalWithLoadIdentifierTuple> aPrincipalTuple); + + // Type of BrowsingContent + const Type mType; + + // Unique id identifying BrowsingContext + const uint64_t mBrowsingContextId; + + RefPtr<BrowsingContextGroup> mGroup; + RefPtr<WindowContext> mParentWindow; + nsCOMPtr<nsIDocShell> mDocShell; + + RefPtr<Element> mEmbedderElement; + + nsTArray<RefPtr<WindowContext>> mWindowContexts; + RefPtr<WindowContext> mCurrentWindowContext; + + // This is not a strong reference, but using a JS::Heap for that should be + // fine. The JSObject stored in here should be a proxy with a + // nsOuterWindowProxy handler, which will update the pointer from its + // objectMoved hook and clear it from its finalize hook. + JS::Heap<JSObject*> mWindowProxy; + LocationProxy mLocation; + + // OriginAttributes for this BrowsingContext. May not be changed after this + // BrowsingContext is attached. + OriginAttributes mOriginAttributes; + + // The network request context id, representing the nsIRequestContext + // associated with this BrowsingContext, and LoadGroups created for it. + uint64_t mRequestContextId = 0; + + // Determines if private browsing should be used. May not be changed after + // this BrowsingContext is attached. This field matches mOriginAttributes in + // content Browsing Contexts. Currently treated as a binary value: 1 - in + // private mode, 0 - not private mode. + uint32_t mPrivateBrowsingId; + + // True if Attach() has been called on this BrowsingContext already. + bool mEverAttached : 1; + + // Is the most recent Document in this BrowsingContext loaded within this + // process? This may be true with a null mDocShell after the Window has been + // closed. + bool mIsInProcess : 1; + + // Has this browsing context been discarded? BrowsingContexts should + // only be discarded once. + bool mIsDiscarded : 1; + + // True if this BrowsingContext has no associated visible window, and is owned + // by whichever process created it, even if top-level. + bool mWindowless : 1; + + // This is true if the BrowsingContext was out of process, but is now in + // process, and might have remote window proxies that need to be cleaned up. + bool mDanglingRemoteOuterProxies : 1; + + // True if this BrowsingContext has been embedded in a element in this + // process. + bool mEmbeddedByThisProcess : 1; + + // Determines if remote (out-of-process) tabs should be used. May not be + // changed after this BrowsingContext is attached. + bool mUseRemoteTabs : 1; + + // Determines if out-of-process iframes should be used. May not be changed + // after this BrowsingContext is attached. + bool mUseRemoteSubframes : 1; + + // True if this BrowsingContext is for a frame that was added dynamically. + bool mCreatedDynamically : 1; + + // Set to true if the browsing context is in the bfcache and pagehide has been + // dispatched. When coming out from the bfcache, the value is set to false + // before dispatching pageshow. + bool mIsInBFCache : 1; + + // Determines if we can execute scripts in this BrowsingContext. True if + // AllowJavascript() is true and script execution is allowed in the parent + // WindowContext. + bool mCanExecuteScripts : 1; + + // The original offset of this context in its container. This property is -1 + // if this BrowsingContext is for a frame that was added dynamically. + int32_t mChildOffset; + + // The start time of user gesture, this is only available if the browsing + // context is in process. + TimeStamp mUserGestureStart; + + // Triggering principal and principal to inherit need to point to original + // principal instances if the document is loaded in the same process as the + // process that initiated the load. When the load starts we save the + // principals along with the current load id. + // These principals correspond to the most recent load that took place within + // the process of this browsing context. + Maybe<PrincipalWithLoadIdentifierTuple> mTriggeringPrincipal; + Maybe<PrincipalWithLoadIdentifierTuple> mPrincipalToInherit; + + class DeprioritizedLoadRunner + : public mozilla::Runnable, + public mozilla::LinkedListElement<DeprioritizedLoadRunner> { + public: + explicit DeprioritizedLoadRunner(nsIRunnable* aInner) + : Runnable("DeprioritizedLoadRunner"), mInner(aInner) {} + + NS_IMETHOD Run() override { + if (mInner) { + RefPtr<nsIRunnable> inner = std::move(mInner); + inner->Run(); + } + + return NS_OK; + } + + private: + RefPtr<nsIRunnable> mInner; + }; + + mozilla::LinkedList<DeprioritizedLoadRunner> mDeprioritizedLoadRunner; + + RefPtr<SessionStorageManager> mSessionStorageManager; + RefPtr<ChildSHistory> mChildSessionHistory; + + nsTArray<std::function<void(uint64_t)>> mDiscardListeners; + + // Counter and time span for rate limiting Location and History API calls. + // Used by CheckLocationChangeRateLimit. Do not apply cross-process. + uint32_t mLocationChangeRateLimitCount; + mozilla::TimeStamp mLocationChangeRateLimitSpanStart; +}; + +/** + * Gets a WindowProxy object for a BrowsingContext that lives in a different + * process (creating the object if it doesn't already exist). The WindowProxy + * object will be in the compartment that aCx is currently in. This should only + * be called if aContext doesn't hold a docshell, otherwise the BrowsingContext + * lives in this process, and a same-process WindowProxy should be used (see + * nsGlobalWindowOuter). This should only be called by bindings code, ToJSValue + * is the right API to get a WindowProxy for a BrowsingContext. + * + * If aTransplantTo is non-null, then the WindowProxy object will eventually be + * transplanted onto it. Therefore it should be used as the value in the remote + * proxy map. + */ +extern bool GetRemoteOuterWindowProxy(JSContext* aCx, BrowsingContext* aContext, + JS::Handle<JSObject*> aTransplantTo, + JS::MutableHandle<JSObject*> aRetVal); + +using BrowsingContextTransaction = BrowsingContext::BaseTransaction; +using BrowsingContextInitializer = BrowsingContext::IPCInitializer; +using MaybeDiscardedBrowsingContext = MaybeDiscarded<BrowsingContext>; + +// Specialize the transaction object for every translation unit it's used in. +extern template class syncedcontext::Transaction<BrowsingContext>; + +} // namespace dom + +// Allow sending BrowsingContext objects over IPC. +namespace ipc { +template <> +struct IPDLParamTraits<dom::MaybeDiscarded<dom::BrowsingContext>> { + static void Write(IPC::MessageWriter* aWriter, IProtocol* aActor, + const dom::MaybeDiscarded<dom::BrowsingContext>& aParam); + static bool Read(IPC::MessageReader* aReader, IProtocol* aActor, + dom::MaybeDiscarded<dom::BrowsingContext>* aResult); +}; + +template <> +struct IPDLParamTraits<dom::BrowsingContext::IPCInitializer> { + static void Write(IPC::MessageWriter* aWriter, IProtocol* aActor, + const dom::BrowsingContext::IPCInitializer& aInitializer); + + static bool Read(IPC::MessageReader* aReader, IProtocol* aActor, + dom::BrowsingContext::IPCInitializer* aInitializer); +}; +} // namespace ipc +} // namespace mozilla + +#endif // !defined(mozilla_dom_BrowsingContext_h) |