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gecko-dev/docshell/base/BrowsingContext.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/BrowsingContext.h"
#include "ipc/IPCMessageUtils.h"
#include "mozilla/dom/CanonicalBrowsingContext.h"
#include "mozilla/dom/BrowsingContextGroup.h"
#include "mozilla/dom/BrowsingContextBinding.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLIFrameElement.h"
#include "mozilla/dom/Location.h"
#include "mozilla/dom/LocationBinding.h"
#include "mozilla/dom/PopupBlocker.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/SessionStorageManager.h"
#include "mozilla/dom/StructuredCloneTags.h"
#include "mozilla/dom/UserActivationIPCUtils.h"
#include "mozilla/dom/WindowBinding.h"
#include "mozilla/dom/WindowGlobalChild.h"
#include "mozilla/dom/WindowGlobalParent.h"
#include "mozilla/dom/WindowProxyHolder.h"
#include "mozilla/dom/SyncedContextInlines.h"
#include "mozilla/Assertions.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/Components.h"
#include "mozilla/HashTable.h"
#include "mozilla/Logging.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPrefs_page_load.h"
#include "mozilla/StaticPtr.h"
#include "nsIURIFixup.h"
#include "nsDocShell.h"
#include "nsFocusManager.h"
#include "nsGlobalWindowOuter.h"
#include "nsIObserverService.h"
#include "nsContentUtils.h"
#include "nsScriptError.h"
#include "nsThreadUtils.h"
#include "xpcprivate.h"
#include "AutoplayPolicy.h"
#include "GVAutoplayRequestStatusIPC.h"
extern mozilla::LazyLogModule gAutoplayPermissionLog;
extern mozilla::LazyLogModule gTimeoutDeferralLog;
#define AUTOPLAY_LOG(msg, ...) \
MOZ_LOG(gAutoplayPermissionLog, LogLevel::Debug, (msg, ##__VA_ARGS__))
namespace IPC {
// Allow serialization and deserialization of OrientationType over IPC
template <>
struct ParamTraits<mozilla::dom::OrientationType>
: public ContiguousEnumSerializerInclusive<
mozilla::dom::OrientationType,
mozilla::dom::OrientationType::Portrait_primary,
mozilla::dom::OrientationType::Landscape_secondary> {};
} // namespace IPC
namespace mozilla {
namespace dom {
// Explicit specialization of the `Transaction` type. Required by the `extern
// template class` declaration in the header.
template class syncedcontext::Transaction<BrowsingContext>;
extern mozilla::LazyLogModule gUserInteractionPRLog;
#define USER_ACTIVATION_LOG(msg, ...) \
MOZ_LOG(gUserInteractionPRLog, LogLevel::Debug, (msg, ##__VA_ARGS__))
static LazyLogModule gBrowsingContextLog("BrowsingContext");
typedef nsDataHashtable<nsUint64HashKey, BrowsingContext*> BrowsingContextMap;
static StaticAutoPtr<BrowsingContextMap> sBrowsingContexts;
static void Register(BrowsingContext* aBrowsingContext) {
sBrowsingContexts->Put(aBrowsingContext->Id(), aBrowsingContext);
aBrowsingContext->Group()->Register(aBrowsingContext);
}
BrowsingContext* BrowsingContext::Top() {
BrowsingContext* bc = this;
while (bc->mParent) {
bc = bc->mParent;
}
return bc;
}
/* static */
void BrowsingContext::Init() {
if (!sBrowsingContexts) {
sBrowsingContexts = new BrowsingContextMap();
ClearOnShutdown(&sBrowsingContexts);
}
}
/* static */
LogModule* BrowsingContext::GetLog() { return gBrowsingContextLog; }
/* static */
already_AddRefed<BrowsingContext> BrowsingContext::Get(uint64_t aId) {
return do_AddRef(sBrowsingContexts->Get(aId));
}
/* static */
already_AddRefed<BrowsingContext> BrowsingContext::GetFromWindow(
WindowProxyHolder& aProxy) {
return do_AddRef(aProxy.get());
}
CanonicalBrowsingContext* BrowsingContext::Canonical() {
return CanonicalBrowsingContext::Cast(this);
}
/* static */
already_AddRefed<BrowsingContext> BrowsingContext::CreateDetached(
BrowsingContext* aParent, BrowsingContext* aOpener, const nsAString& aName,
Type aType) {
MOZ_DIAGNOSTIC_ASSERT(!aParent || aParent->mType == aType);
MOZ_DIAGNOSTIC_ASSERT(aType != Type::Chrome || XRE_IsParentProcess());
uint64_t id = nsContentUtils::GenerateBrowsingContextId();
MOZ_LOG(GetLog(), LogLevel::Debug,
("Creating 0x%08" PRIx64 " in %s", id,
XRE_IsParentProcess() ? "Parent" : "Child"));
// Determine which BrowsingContextGroup this context should be created in.
RefPtr<BrowsingContextGroup> group =
(aType == Type::Chrome)
? do_AddRef(BrowsingContextGroup::GetChromeGroup())
: BrowsingContextGroup::Select(aParent, aOpener);
RefPtr<BrowsingContext> context;
if (XRE_IsParentProcess()) {
context =
new CanonicalBrowsingContext(aParent, group, id,
/* aOwnerProcessId */ 0,
/* aEmbedderProcessId */ 0, aType, {});
} else {
context = new BrowsingContext(aParent, group, id, aType, {});
}
// The name and opener fields need to be explicitly initialized. Don't bother
// using transactions to set them, as we haven't been attached yet.
context->mFields.SetWithoutSyncing<IDX_Name>(aName);
if (aOpener) {
MOZ_DIAGNOSTIC_ASSERT(aOpener->Group() == context->Group());
MOZ_DIAGNOSTIC_ASSERT(aOpener->mType == context->mType);
context->mFields.SetWithoutSyncing<IDX_OpenerId>(aOpener->Id());
context->mFields.SetWithoutSyncing<IDX_HadOriginalOpener>(true);
}
context->mFields.SetWithoutSyncing<IDX_EmbedderPolicy>(
nsILoadInfo::EMBEDDER_POLICY_NULL);
BrowsingContext* inherit = aParent ? aParent : aOpener;
if (inherit) {
context->mFields.SetWithoutSyncing<IDX_OpenerPolicy>(
inherit->Top()->GetOpenerPolicy());
// CORPP 3.1.3 https://mikewest.github.io/corpp/#integration-html
context->mFields.SetWithoutSyncing<IDX_EmbedderPolicy>(
inherit->GetEmbedderPolicy());
// if our parent has a parent that's loading, we need it too
bool ancestorLoading = aParent ? aParent->GetAncestorLoading() : false;
if (!ancestorLoading && aParent) {
// XXX(farre): Can/Should we check aParent->IsLoading() here? (Bug
// 1608448) Check if the parent was itself loading already
nsPIDOMWindowOuter* outer = aParent->GetDOMWindow();
if (outer) {
Document* document = nsGlobalWindowOuter::Cast(outer)->GetDocument();
auto readystate = document->GetReadyStateEnum();
if (readystate == Document::ReadyState::READYSTATE_LOADING ||
readystate == Document::ReadyState::READYSTATE_INTERACTIVE) {
ancestorLoading = true;
}
}
}
context->mFields.SetWithoutSyncing<IDX_AncestorLoading>(ancestorLoading);
}
nsContentUtils::GenerateUUIDInPlace(
context->mFields.GetNonSyncingReference<IDX_HistoryID>());
context->mFields.SetWithoutSyncing<IDX_IsActive>(true);
return context.forget();
}
already_AddRefed<BrowsingContext> BrowsingContext::Create(
BrowsingContext* aParent, BrowsingContext* aOpener, const nsAString& aName,
Type aType) {
RefPtr<BrowsingContext> bc(CreateDetached(aParent, aOpener, aName, aType));
bc->EnsureAttached();
return bc.forget();
}
already_AddRefed<BrowsingContext> BrowsingContext::CreateWindowless(
BrowsingContext* aParent, BrowsingContext* aOpener, const nsAString& aName,
Type aType) {
RefPtr<BrowsingContext> bc(CreateDetached(aParent, aOpener, aName, aType));
bc->mWindowless = true;
bc->EnsureAttached();
return bc.forget();
}
void BrowsingContext::SetWindowless() {
MOZ_DIAGNOSTIC_ASSERT(!mEverAttached);
mWindowless = true;
}
void BrowsingContext::EnsureAttached() {
if (!mEverAttached) {
Register(this);
// Attach the browsing context to the tree.
Attach();
}
}
/* static */
already_AddRefed<BrowsingContext> BrowsingContext::CreateFromIPC(
BrowsingContext::IPCInitializer&& aInit, BrowsingContextGroup* aGroup,
ContentParent* aOriginProcess) {
MOZ_DIAGNOSTIC_ASSERT(aOriginProcess || XRE_IsContentProcess());
MOZ_DIAGNOSTIC_ASSERT(aGroup);
uint64_t originId = 0;
if (aOriginProcess) {
originId = aOriginProcess->ChildID();
aGroup->EnsureSubscribed(aOriginProcess);
}
MOZ_LOG(GetLog(), LogLevel::Debug,
("Creating 0x%08" PRIx64 " from IPC (origin=0x%08" PRIx64 ")",
aInit.mId, originId));
RefPtr<BrowsingContext> parent = aInit.GetParent();
RefPtr<BrowsingContext> context;
if (XRE_IsParentProcess()) {
// If the new BrowsingContext has a parent, it is a sub-frame embedded in
// whatever process sent the message. If it doesn't, and is not windowless,
// it is a new window or tab, and will be embedded in the parent process.
uint64_t embedderProcessId = (aInit.mWindowless || parent) ? originId : 0;
context = new CanonicalBrowsingContext(parent, aGroup, aInit.mId, originId,
embedderProcessId, Type::Content,
std::move(aInit.mFields));
} else {
context = new BrowsingContext(parent, aGroup, aInit.mId, Type::Content,
std::move(aInit.mFields));
}
context->mWindowless = aInit.mWindowless;
Register(context);
// Caller handles attaching us to the tree.
if (aInit.mCached) {
context->mEverAttached = true;
}
return context.forget();
}
BrowsingContext::BrowsingContext(BrowsingContext* aParent,
BrowsingContextGroup* aGroup,
uint64_t aBrowsingContextId, Type aType,
FieldTuple&& aFields)
: mFields(std::move(aFields)),
mType(aType),
mBrowsingContextId(aBrowsingContextId),
mGroup(aGroup),
mParent(aParent),
mEverAttached(false),
mIsInProcess(false),
mIsDiscarded(false),
mWindowless(false),
mDanglingRemoteOuterProxies(false),
mPendingInitialization(false),
mEmbeddedByThisProcess(false) {
MOZ_RELEASE_ASSERT(!mParent || mParent->Group() == mGroup);
MOZ_RELEASE_ASSERT(mBrowsingContextId != 0);
MOZ_RELEASE_ASSERT(mGroup);
}
void BrowsingContext::SetDocShell(nsIDocShell* aDocShell) {
// XXX(nika): We should communicate that we are now an active BrowsingContext
// process to the parent & do other validation here.
MOZ_DIAGNOSTIC_ASSERT(mEverAttached);
MOZ_RELEASE_ASSERT(aDocShell->GetBrowsingContext() == this);
mDocShell = aDocShell;
mDanglingRemoteOuterProxies = !mIsInProcess;
mIsInProcess = true;
}
// This class implements a callback that will return the remote window proxy for
// mBrowsingContext in that compartment, if it has one. It also removes the
// proxy from the map, because the object will be transplanted into another kind
// of object.
class MOZ_STACK_CLASS CompartmentRemoteProxyTransplantCallback
: public js::CompartmentTransplantCallback {
public:
explicit CompartmentRemoteProxyTransplantCallback(
BrowsingContext* aBrowsingContext)
: mBrowsingContext(aBrowsingContext) {}
virtual JSObject* getObjectToTransplant(
JS::Compartment* compartment) override {
auto* priv = xpc::CompartmentPrivate::Get(compartment);
if (!priv) {
return nullptr;
}
auto& map = priv->GetRemoteProxyMap();
auto result = map.lookup(mBrowsingContext);
if (!result) {
return nullptr;
}
JSObject* resultObject = result->value();
map.remove(result);
return resultObject;
}
private:
BrowsingContext* mBrowsingContext;
};
void BrowsingContext::CleanUpDanglingRemoteOuterWindowProxies(
JSContext* aCx, JS::MutableHandle<JSObject*> aOuter) {
if (!mDanglingRemoteOuterProxies) {
return;
}
mDanglingRemoteOuterProxies = false;
CompartmentRemoteProxyTransplantCallback cb(this);
js::RemapRemoteWindowProxies(aCx, &cb, aOuter);
}
void BrowsingContext::SetEmbedderElement(Element* aEmbedder) {
mEmbeddedByThisProcess = true;
// Notify the parent process of the embedding status. We don't need to do
// this when clearing our embedder, as we're being destroyed either way.
if (aEmbedder) {
if (nsCOMPtr<nsPIDOMWindowInner> inner =
do_QueryInterface(aEmbedder->GetOwnerGlobal())) {
Transaction txn;
txn.SetEmbedderInnerWindowId(inner->WindowID());
txn.SetEmbedderElementType(Some(aEmbedder->LocalName()));
txn.Commit(this);
}
}
mEmbedderElement = aEmbedder;
}
void BrowsingContext::Embed() {
if (auto* frame = HTMLIFrameElement::FromNode(mEmbedderElement)) {
frame->BindToBrowsingContext(this);
}
}
void BrowsingContext::Attach(bool aFromIPC) {
MOZ_DIAGNOSTIC_ASSERT(!mEverAttached);
mEverAttached = true;
MOZ_LOG(GetLog(), LogLevel::Debug,
("%s: Connecting 0x%08" PRIx64 " to 0x%08" PRIx64,
XRE_IsParentProcess() ? "Parent" : "Child", Id(),
mParent ? mParent->Id() : 0));
MOZ_DIAGNOSTIC_ASSERT(mGroup);
MOZ_DIAGNOSTIC_ASSERT(!mGroup->IsContextCached(this));
MOZ_DIAGNOSTIC_ASSERT(!mIsDiscarded);
Children* children = nullptr;
if (mParent) {
children = &mParent->mChildren;
BrowsingContext_Binding::ClearCachedChildrenValue(mParent);
} else {
children = &mGroup->Toplevels();
}
MOZ_DIAGNOSTIC_ASSERT(!children->Contains(this));
children->AppendElement(this);
if (GetIsPopupSpam()) {
PopupBlocker::RegisterOpenPopupSpam();
}
if (!aFromIPC) {
// Send attach to our parent if we need to.
if (XRE_IsContentProcess()) {
ContentChild::GetSingleton()->SendAttachBrowsingContext(
GetIPCInitializer());
} else if (IsContent()) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
mGroup->EachParent([&](ContentParent* aParent) {
Unused << aParent->SendAttachBrowsingContext(GetIPCInitializer());
});
}
}
}
void BrowsingContext::Detach(bool aFromIPC) {
MOZ_DIAGNOSTIC_ASSERT(mEverAttached);
MOZ_LOG(GetLog(), LogLevel::Debug,
("%s: Detaching 0x%08" PRIx64 " from 0x%08" PRIx64,
XRE_IsParentProcess() ? "Parent" : "Child", Id(),
mParent ? mParent->Id() : 0));
// Unlinking might remove our group before Detach gets called.
if (NS_WARN_IF(!mGroup)) {
return;
}
if (!mGroup->EvictCachedContext(this)) {
Children* children = nullptr;
if (mParent) {
children = &mParent->mChildren;
BrowsingContext_Binding::ClearCachedChildrenValue(mParent);
} else {
children = &mGroup->Toplevels();
}
children->RemoveElement(this);
}
if (!mChildren.IsEmpty()) {
mGroup->CacheContexts(mChildren);
mChildren.Clear();
BrowsingContext_Binding::ClearCachedChildrenValue(this);
}
{
// Hold a strong reference to ourself until the responses comes back to
// ensure we don't die while messages relating to this context are
// in-flight.
RefPtr<BrowsingContext> self(this);
auto callback = [self](auto) {};
if (XRE_IsParentProcess()) {
Group()->EachParent([&](ContentParent* aParent) {
// Only the embedder process is allowed to initiate a BrowsingContext
// detach, so if we've gotten here, the host process already knows we've
// been detached, and there's no need to tell it again.
if (!Canonical()->IsEmbeddedInProcess(aParent->ChildID())) {
aParent->SendDetachBrowsingContext(Id(), callback, callback);
}
});
} else if (!aFromIPC) {
ContentChild::GetSingleton()->SendDetachBrowsingContext(Id(), callback,
callback);
}
}
mGroup->Unregister(this);
mIsDiscarded = true;
if (XRE_IsParentProcess()) {
nsFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
fm->BrowsingContextDetached(this);
}
}
if (nsCOMPtr<nsIObserverService> obs = services::GetObserverService()) {
obs->NotifyObservers(ToSupports(this), "browsing-context-discarded",
nullptr);
}
// NOTE: Doesn't use SetClosed, as it will be set in all processes
// automatically by calls to Detach()
mFields.SetWithoutSyncing<IDX_Closed>(true);
if (GetIsPopupSpam()) {
PopupBlocker::UnregisterOpenPopupSpam();
// NOTE: Doesn't use SetIsPopupSpam, as it will be set all processes
// automatically.
mFields.SetWithoutSyncing<IDX_IsPopupSpam>(false);
}
if (XRE_IsParentProcess()) {
Canonical()->CanonicalDiscard();
}
}
void BrowsingContext::PrepareForProcessChange() {
MOZ_LOG(GetLog(), LogLevel::Debug,
("%s: Preparing 0x%08" PRIx64 " for a process change",
XRE_IsParentProcess() ? "Parent" : "Child", Id()));
MOZ_ASSERT(mIsInProcess, "Must currently be an in-process frame");
MOZ_ASSERT(!mIsDiscarded, "We're already closed?");
mIsInProcess = false;
mUserGestureStart = TimeStamp();
// NOTE: For now, clear our nsDocShell reference, as we're primarily in a
// different process now. This may need to change in the future with
// Cross-Process BFCache.
mDocShell = nullptr;
if (!mWindowProxy) {
return;
}
// We have to go through mWindowProxy rather than calling GetDOMWindow() on
// mDocShell because the mDocshell reference gets cleared immediately after
// the window is closed.
nsGlobalWindowOuter::PrepareForProcessChange(mWindowProxy);
MOZ_ASSERT(!mWindowProxy);
}
void BrowsingContext::CacheChildren(bool aFromIPC) {
MOZ_LOG(GetLog(), LogLevel::Debug,
("%s: Caching children of 0x%08" PRIx64 "",
XRE_IsParentProcess() ? "Parent" : "Child", Id()));
mGroup->CacheContexts(mChildren);
mChildren.Clear();
BrowsingContext_Binding::ClearCachedChildrenValue(this);
if (!aFromIPC && XRE_IsContentProcess()) {
auto cc = ContentChild::GetSingleton();
MOZ_DIAGNOSTIC_ASSERT(cc);
cc->SendCacheBrowsingContextChildren(this);
}
}
void BrowsingContext::RestoreChildren(Children&& aChildren, bool aFromIPC) {
MOZ_LOG(GetLog(), LogLevel::Debug,
("%s: Restoring children of 0x%08" PRIx64 "",
XRE_IsParentProcess() ? "Parent" : "Child", Id()));
nsTArray<MaybeDiscarded<BrowsingContext>> ipcChildren(aChildren.Length());
for (BrowsingContext* child : aChildren) {
MOZ_DIAGNOSTIC_ASSERT(child->GetParent() == this);
Unused << mGroup->EvictCachedContext(child);
ipcChildren.AppendElement(child);
}
mChildren.AppendElements(aChildren);
BrowsingContext_Binding::ClearCachedChildrenValue(this);
if (!aFromIPC && XRE_IsContentProcess()) {
auto cc = ContentChild::GetSingleton();
MOZ_DIAGNOSTIC_ASSERT(cc);
cc->SendRestoreBrowsingContextChildren(this, ipcChildren);
}
}
bool BrowsingContext::IsCached() { return mGroup->IsContextCached(this); }
bool BrowsingContext::IsTargetable() {
return !GetClosed() && !mIsDiscarded && !IsCached();
}
bool BrowsingContext::HasOpener() const {
return sBrowsingContexts->Contains(GetOpenerId());
}
void BrowsingContext::GetChildren(Children& aChildren) {
MOZ_ALWAYS_TRUE(aChildren.AppendElements(mChildren));
}
void BrowsingContext::GetWindowContexts(
nsTArray<RefPtr<WindowContext>>& aWindows) {
aWindows.AppendElements(mWindowContexts);
}
void BrowsingContext::RegisterWindowContext(WindowContext* aWindow) {
MOZ_ASSERT(!mWindowContexts.Contains(aWindow),
"WindowContext already registered!");
mWindowContexts.AppendElement(aWindow);
}
void BrowsingContext::UnregisterWindowContext(WindowContext* aWindow) {
MOZ_ASSERT(mWindowContexts.Contains(aWindow),
"WindowContext not registered!");
mWindowContexts.RemoveElement(aWindow);
// Our current window global should be in our mWindowGlobals set. If it's not
// anymore, clear that reference.
// FIXME: There are probably situations where this is wrong. We should
// double-check.
if (aWindow == mCurrentWindowContext) {
mCurrentWindowContext = nullptr;
if (XRE_IsParentProcess()) {
BrowserParent::UpdateFocusFromBrowsingContext();
}
}
}
// FindWithName follows the rules for choosing a browsing context,
// with the exception of sandboxing for iframes. The implementation
// for arbitrarily choosing between two browsing contexts with the
// same name is as follows:
//
// 1) The start browsing context, i.e. 'this'
// 2) Descendants in insertion order
// 3) The parent
// 4) Siblings and their children, both in insertion order
// 5) After this we iteratively follow the parent chain, repeating 3
// and 4 until
// 6) If there is no parent, consider all other top level browsing
// contexts and their children, both in insertion order
//
// See
// https://html.spec.whatwg.org/multipage/browsers.html#the-rules-for-choosing-a-browsing-context-given-a-browsing-context-name
BrowsingContext* BrowsingContext::FindWithName(
const nsAString& aName, bool aUseEntryGlobalForAccessCheck) {
RefPtr<BrowsingContext> requestingContext = this;
if (aUseEntryGlobalForAccessCheck) {
if (nsCOMPtr<nsIDocShell> caller = do_GetInterface(GetEntryGlobal())) {
if (caller->GetBrowsingContext()) {
requestingContext = caller->GetBrowsingContext();
}
}
}
BrowsingContext* found = nullptr;
if (aName.IsEmpty()) {
// You can't find a browsing context with an empty name.
found = nullptr;
} else if (aName.LowerCaseEqualsLiteral("_blank")) {
// Just return null. Caller must handle creating a new window with
// a blank name.
found = nullptr;
} else if (nsContentUtils::IsSpecialName(aName)) {
found = FindWithSpecialName(aName, *requestingContext);
} else if (BrowsingContext* child =
FindWithNameInSubtree(aName, *requestingContext)) {
found = child;
} else {
BrowsingContext* current = this;
do {
Children* siblings;
BrowsingContext* parent = current->mParent;
if (!parent) {
// We've reached the root of the tree, consider browsing
// contexts in the same browsing context group.
siblings = &mGroup->Toplevels();
} else if (parent->NameEquals(aName) &&
requestingContext->CanAccess(parent) &&
parent->IsTargetable()) {
found = parent;
break;
} else {
siblings = &parent->mChildren;
}
for (BrowsingContext* sibling : *siblings) {
if (sibling == current) {
continue;
}
if (BrowsingContext* relative =
sibling->FindWithNameInSubtree(aName, *requestingContext)) {
found = relative;
// Breaks the outer loop
parent = nullptr;
break;
}
}
current = parent;
} while (current);
}
// Helpers should perform access control checks, which means that we
// only need to assert that we can access found.
MOZ_DIAGNOSTIC_ASSERT(!found || requestingContext->CanAccess(found));
return found;
}
BrowsingContext* BrowsingContext::FindChildWithName(
const nsAString& aName, BrowsingContext& aRequestingContext) {
if (aName.IsEmpty()) {
// You can't find a browsing context with the empty name.
return nullptr;
}
for (BrowsingContext* child : mChildren) {
if (child->NameEquals(aName) && aRequestingContext.CanAccess(child) &&
child->IsTargetable()) {
return child;
}
}
return nullptr;
}
BrowsingContext* BrowsingContext::FindWithSpecialName(
const nsAString& aName, BrowsingContext& aRequestingContext) {
// TODO(farre): Neither BrowsingContext nor nsDocShell checks if the
// browsing context pointed to by a special name is active. Should
// it be? See Bug 1527913.
if (aName.LowerCaseEqualsLiteral("_self")) {
return this;
}
if (aName.LowerCaseEqualsLiteral("_parent")) {
if (mParent) {
return aRequestingContext.CanAccess(mParent) ? mParent.get() : nullptr;
}
return this;
}
if (aName.LowerCaseEqualsLiteral("_top")) {
BrowsingContext* top = Top();
return aRequestingContext.CanAccess(top) ? top : nullptr;
}
return nullptr;
}
BrowsingContext* BrowsingContext::FindWithNameInSubtree(
const nsAString& aName, BrowsingContext& aRequestingContext) {
MOZ_DIAGNOSTIC_ASSERT(!aName.IsEmpty());
if (NameEquals(aName) && aRequestingContext.CanAccess(this) &&
IsTargetable()) {
return this;
}
for (BrowsingContext* child : mChildren) {
if (BrowsingContext* found =
child->FindWithNameInSubtree(aName, aRequestingContext)) {
return found;
}
}
return nullptr;
}
// For historical context, see:
//
// Bug 13871: Prevent frameset spoofing
// Bug 103638: Targets with same name in different windows open in wrong
// window with javascript
// Bug 408052: Adopt "ancestor" frame navigation policy
// Bug 1570207: Refactor logic to rely on BrowsingContextGroups to enforce
// origin attribute isolation.
bool BrowsingContext::CanAccess(BrowsingContext* aTarget,
bool aConsiderOpener) {
MOZ_ASSERT(
mDocShell,
"CanAccess() may only be called in the process of the accessing window");
MOZ_ASSERT(aTarget, "Must have a target");
MOZ_DIAGNOSTIC_ASSERT(
Group() == aTarget->Group(),
"A BrowsingContext should never see a context from a different group");
// A frame can navigate itself and its own root.
if (aTarget == this || aTarget == Top()) {
return true;
}
// A frame can navigate any frame with a same-origin ancestor.
for (BrowsingContext* bc = aTarget; bc; bc = bc->GetParent()) {
if (bc->mDocShell && nsDocShell::ValidateOrigin(this, bc)) {
return true;
}
}
// If the target is a top-level document, a frame can navigate it if it can
// navigate its opener.
if (aConsiderOpener && !aTarget->GetParent()) {
if (RefPtr<BrowsingContext> opener = aTarget->GetOpener()) {
return CanAccess(opener, false);
}
}
return false;
}
RefPtr<SessionStorageManager> BrowsingContext::GetSessionStorageManager() {
RefPtr<SessionStorageManager>& manager = Top()->mSessionStorageManager;
if (!manager) {
manager = new SessionStorageManager(this);
}
return manager;
}
BrowsingContext::~BrowsingContext() {
MOZ_DIAGNOSTIC_ASSERT(!mParent || !mParent->mChildren.Contains(this));
MOZ_DIAGNOSTIC_ASSERT(!mGroup || !mGroup->Toplevels().Contains(this));
MOZ_DIAGNOSTIC_ASSERT(!mGroup || !mGroup->IsContextCached(this));
mDeprioritizedLoadRunner.clear();
if (sBrowsingContexts) {
sBrowsingContexts->Remove(Id());
}
}
nsISupports* BrowsingContext::GetParentObject() const {
return xpc::NativeGlobal(xpc::PrivilegedJunkScope());
}
JSObject* BrowsingContext::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return BrowsingContext_Binding::Wrap(aCx, this, aGivenProto);
}
bool BrowsingContext::WriteStructuredClone(JSContext* aCx,
JSStructuredCloneWriter* aWriter,
StructuredCloneHolder* aHolder) {
MOZ_DIAGNOSTIC_ASSERT(mEverAttached);
return (JS_WriteUint32Pair(aWriter, SCTAG_DOM_BROWSING_CONTEXT, 0) &&
JS_WriteUint32Pair(aWriter, uint32_t(Id()), uint32_t(Id() >> 32)));
}
/* static */
JSObject* BrowsingContext::ReadStructuredClone(JSContext* aCx,
JSStructuredCloneReader* aReader,
StructuredCloneHolder* aHolder) {
uint32_t idLow = 0;
uint32_t idHigh = 0;
if (!JS_ReadUint32Pair(aReader, &idLow, &idHigh)) {
return nullptr;
}
uint64_t id = uint64_t(idHigh) << 32 | idLow;
// Note: Do this check after reading our ID data. Returning null will abort
// the decode operation anyway, but we should at least be as safe as possible.
if (NS_WARN_IF(!NS_IsMainThread())) {
MOZ_DIAGNOSTIC_ASSERT(false,
"We shouldn't be trying to decode a BrowsingContext "
"on a background thread.");
return nullptr;
}
JS::RootedValue val(aCx, JS::NullValue());
// We'll get rooting hazard errors from the RefPtr destructor if it isn't
// destroyed before we try to return a raw JSObject*, so create it in its own
// scope.
if (RefPtr<BrowsingContext> context = Get(id)) {
if (!GetOrCreateDOMReflector(aCx, context, &val) || !val.isObject()) {
return nullptr;
}
}
return val.toObjectOrNull();
}
void BrowsingContext::NotifyUserGestureActivation() {
SetUserActivationState(UserActivation::State::FullActivated);
}
void BrowsingContext::NotifyResetUserGestureActivation() {
SetUserActivationState(UserActivation::State::None);
}
bool BrowsingContext::HasBeenUserGestureActivated() {
return GetUserActivationState() != UserActivation::State::None;
}
bool BrowsingContext::HasValidTransientUserGestureActivation() {
MOZ_ASSERT(mIsInProcess);
if (GetUserActivationState() != UserActivation::State::FullActivated) {
MOZ_ASSERT(mUserGestureStart.IsNull(),
"mUserGestureStart should be null if the document hasn't ever "
"been activated by user gesture");
return false;
}
MOZ_ASSERT(!mUserGestureStart.IsNull(),
"mUserGestureStart shouldn't be null if the document has ever "
"been activated by user gesture");
TimeDuration timeout = TimeDuration::FromMilliseconds(
StaticPrefs::dom_user_activation_transient_timeout());
return timeout <= TimeDuration() ||
(TimeStamp::Now() - mUserGestureStart) <= timeout;
}
bool BrowsingContext::ConsumeTransientUserGestureActivation() {
MOZ_ASSERT(mIsInProcess);
if (!HasValidTransientUserGestureActivation()) {
return false;
}
BrowsingContext* top = Top();
top->PreOrderWalk([&](BrowsingContext* aContext) {
if (aContext->GetUserActivationState() ==
UserActivation::State::FullActivated) {
aContext->SetUserActivationState(UserActivation::State::HasBeenActivated);
}
});
return true;
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(BrowsingContext)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_CLASS(BrowsingContext)
NS_IMPL_CYCLE_COLLECTING_ADDREF(BrowsingContext)
NS_IMPL_CYCLE_COLLECTING_RELEASE(BrowsingContext)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(BrowsingContext)
NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(BrowsingContext)
if (sBrowsingContexts) {
sBrowsingContexts->Remove(tmp->Id());
}
if (tmp->GetIsPopupSpam()) {
PopupBlocker::UnregisterOpenPopupSpam();
// NOTE: Doesn't use SetIsPopupSpam, as it will be set all processes
// automatically.
tmp->mFields.SetWithoutSyncing<IDX_IsPopupSpam>(false);
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocShell, mChildren, mParent, mGroup,
mEmbedderElement, mWindowContexts,
mCurrentWindowContext, mSessionStorageManager)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(BrowsingContext)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(
mDocShell, mChildren, mParent, mGroup, mEmbedderElement, mWindowContexts,
mCurrentWindowContext, mSessionStorageManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
class RemoteLocationProxy
: public RemoteObjectProxy<BrowsingContext::LocationProxy,
Location_Binding::sCrossOriginAttributes,
Location_Binding::sCrossOriginMethods> {
public:
typedef RemoteObjectProxy Base;
constexpr RemoteLocationProxy()
: RemoteObjectProxy(prototypes::id::Location) {}
void NoteChildren(JSObject* aProxy,
nsCycleCollectionTraversalCallback& aCb) const override {
auto location =
static_cast<BrowsingContext::LocationProxy*>(GetNative(aProxy));
CycleCollectionNoteChild(aCb, location->GetBrowsingContext(),
"js::GetObjectPrivate(obj)->GetBrowsingContext()");
}
};
static const RemoteLocationProxy sSingleton;
// Give RemoteLocationProxy 2 reserved slots, like the other wrappers,
// so JSObject::swap can swap it with CrossCompartmentWrappers without requiring
// malloc.
template <>
const JSClass RemoteLocationProxy::Base::sClass =
PROXY_CLASS_DEF("Proxy", JSCLASS_HAS_RESERVED_SLOTS(2));
void BrowsingContext::Location(JSContext* aCx,
JS::MutableHandle<JSObject*> aLocation,
ErrorResult& aError) {
aError.MightThrowJSException();
sSingleton.GetProxyObject(aCx, &mLocation, /* aTransplantTo = */ nullptr,
aLocation);
if (!aLocation) {
aError.StealExceptionFromJSContext(aCx);
}
}
nsresult BrowsingContext::LoadURI(BrowsingContext* aAccessor,
nsDocShellLoadState* aLoadState,
bool aSetNavigating) {
// Per spec, most load attempts are silently ignored when a BrowsingContext is
// null (which in our code corresponds to discarded), so we simply fail
// silently in those cases. Regardless, we cannot trigger loads in/from
// discarded BrowsingContexts via IPC, so we need to abort in any case.
if (IsDiscarded() || (aAccessor && aAccessor->IsDiscarded())) {
return NS_OK;
}
if (mDocShell) {
return mDocShell->LoadURI(aLoadState, aSetNavigating);
}
if (!aAccessor && XRE_IsParentProcess()) {
if (ContentParent* cp = Canonical()->GetContentParent()) {
Unused << cp->SendLoadURI(this, aLoadState, aSetNavigating);
}
} else {
MOZ_DIAGNOSTIC_ASSERT(aAccessor);
MOZ_DIAGNOSTIC_ASSERT(aAccessor->Group() == Group());
if (!aAccessor->CanAccess(this)) {
return NS_ERROR_DOM_PROP_ACCESS_DENIED;
}
nsCOMPtr<nsPIDOMWindowOuter> win(aAccessor->GetDOMWindow());
MOZ_DIAGNOSTIC_ASSERT(win);
if (WindowGlobalChild* wgc =
win->GetCurrentInnerWindow()->GetWindowGlobalChild()) {
wgc->SendLoadURI(this, aLoadState, aSetNavigating);
}
}
return NS_OK;
}
nsresult BrowsingContext::InternalLoad(BrowsingContext* aAccessor,
nsDocShellLoadState* aLoadState,
nsIDocShell** aDocShell,
nsIRequest** aRequest) {
if (IsDiscarded() || (aAccessor && aAccessor->IsDiscarded())) {
return NS_OK;
}
bool isActive =
aAccessor && aAccessor->GetIsActive() && !GetIsActive() &&
!Preferences::GetBool("browser.tabs.loadDivertedInBackground", false);
if (mDocShell) {
nsresult rv = nsDocShell::Cast(mDocShell)->InternalLoad(
aLoadState, aDocShell, aRequest);
NS_ENSURE_SUCCESS(rv, rv);
// Switch to target tab if we're currently focused window.
// Take loadDivertedInBackground into account so the behavior would be
// the same as how the tab first opened.
nsCOMPtr<nsPIDOMWindowOuter> domWin = GetDOMWindow();
if (isActive && domWin) {
nsFocusManager::FocusWindow(domWin, CallerType::System);
}
// Else we ran out of memory, or were a popup and got blocked,
// or something.
return rv;
}
if (XRE_IsParentProcess()) {
if (ContentParent* cp = Canonical()->GetContentParent()) {
Unused << cp->SendInternalLoad(this, aLoadState, isActive);
}
} else {
MOZ_DIAGNOSTIC_ASSERT(aAccessor);
MOZ_DIAGNOSTIC_ASSERT(aAccessor->Group() == Group());
if (!aAccessor->CanAccess(this)) {
return NS_ERROR_DOM_PROP_ACCESS_DENIED;
}
nsCOMPtr<nsPIDOMWindowOuter> win(aAccessor->GetDOMWindow());
MOZ_DIAGNOSTIC_ASSERT(win);
if (WindowGlobalChild* wgc =
win->GetCurrentInnerWindow()->GetWindowGlobalChild()) {
wgc->SendInternalLoad(this, aLoadState);
}
}
return NS_OK;
}
void BrowsingContext::DisplayLoadError(const nsAString& aURI) {
MOZ_LOG(GetLog(), LogLevel::Debug, ("DisplayLoadError"));
MOZ_DIAGNOSTIC_ASSERT(!IsDiscarded());
MOZ_DIAGNOSTIC_ASSERT(mDocShell || XRE_IsParentProcess());
if (mDocShell) {
bool didDisplayLoadError = false;
mDocShell->DisplayLoadError(NS_ERROR_MALFORMED_URI, nullptr,
PromiseFlatString(aURI).get(), nullptr,
&didDisplayLoadError);
} else {
if (ContentParent* cp = Canonical()->GetContentParent()) {
Unused << cp->SendDisplayLoadError(this, PromiseFlatString(aURI));
}
}
}
WindowProxyHolder BrowsingContext::Window() {
return WindowProxyHolder(Self());
}
WindowProxyHolder BrowsingContext::GetFrames(ErrorResult& aError) {
return Window();
}
void BrowsingContext::Close(CallerType aCallerType, ErrorResult& aError) {
if (mIsDiscarded) {
return;
}
// FIXME We need to set the Closed field, but only once we're sending the
// DOMWindowClose event (which happens in the process where the
// document for this browsing context is loaded).
// See https://bugzilla.mozilla.org/show_bug.cgi?id=1516343.
if (GetDOMWindow()) {
nsGlobalWindowOuter::Cast(GetDOMWindow())
->CloseOuter(aCallerType == CallerType::System);
} else if (ContentChild* cc = ContentChild::GetSingleton()) {
cc->SendWindowClose(this, aCallerType == CallerType::System);
} else if (ContentParent* cp = Canonical()->GetContentParent()) {
Unused << cp->SendWindowClose(this, aCallerType == CallerType::System);
}
}
void BrowsingContext::Focus(CallerType aCallerType, ErrorResult& aError) {
if (ContentChild* cc = ContentChild::GetSingleton()) {
cc->SendWindowFocus(this, aCallerType);
} else if (ContentParent* cp = Canonical()->GetContentParent()) {
Unused << cp->SendWindowFocus(this, aCallerType);
}
}
void BrowsingContext::Blur(ErrorResult& aError) {
if (ContentChild* cc = ContentChild::GetSingleton()) {
cc->SendWindowBlur(this);
} else if (ContentParent* cp = Canonical()->GetContentParent()) {
Unused << cp->SendWindowBlur(this);
}
}
Nullable<WindowProxyHolder> BrowsingContext::GetWindow() {
if (XRE_IsParentProcess() && !IsInProcess()) {
return nullptr;
}
return WindowProxyHolder(this);
}
Nullable<WindowProxyHolder> BrowsingContext::GetTop(ErrorResult& aError) {
if (mIsDiscarded) {
return nullptr;
}
// We never return null or throw an error, but the implementation in
// nsGlobalWindow does and we need to use the same signature.
return WindowProxyHolder(Top());
}
void BrowsingContext::GetOpener(JSContext* aCx,
JS::MutableHandle<JS::Value> aOpener,
ErrorResult& aError) const {
RefPtr<BrowsingContext> opener = GetOpener();
if (!opener) {
aOpener.setNull();
return;
}
if (!ToJSValue(aCx, WindowProxyHolder(opener), aOpener)) {
aError.NoteJSContextException(aCx);
}
}
Nullable<WindowProxyHolder> BrowsingContext::GetParent(ErrorResult& aError) {
if (mIsDiscarded) {
return nullptr;
}
// We never throw an error, but the implementation in nsGlobalWindow does and
// we need to use the same signature.
if (!mParent) {
return WindowProxyHolder(this);
}
return WindowProxyHolder(mParent.get());
}
void BrowsingContext::PostMessageMoz(JSContext* aCx,
JS::Handle<JS::Value> aMessage,
const nsAString& aTargetOrigin,
const Sequence<JSObject*>& aTransfer,
nsIPrincipal& aSubjectPrincipal,
ErrorResult& aError) {
if (mIsDiscarded) {
return;
}
RefPtr<BrowsingContext> sourceBc;
PostMessageData data;
data.targetOrigin() = aTargetOrigin;
data.subjectPrincipal() = &aSubjectPrincipal;
RefPtr<nsGlobalWindowInner> callerInnerWindow;
nsAutoCString scriptLocation;
// We don't need to get the caller's agentClusterId since that is used for
// checking whether it's okay to sharing memory (and it's not allowed to share
// memory cross processes)
if (!nsGlobalWindowOuter::GatherPostMessageData(
aCx, aTargetOrigin, getter_AddRefs(sourceBc), data.origin(),
getter_AddRefs(data.targetOriginURI()),
getter_AddRefs(data.callerPrincipal()),
getter_AddRefs(callerInnerWindow), getter_AddRefs(data.callerURI()),
/* aCallerAgentClusterId */ nullptr, &scriptLocation, aError)) {
return;
}
if (sourceBc && sourceBc->IsDiscarded()) {
return;
}
data.source() = sourceBc;
data.isFromPrivateWindow() =
callerInnerWindow &&
nsScriptErrorBase::ComputeIsFromPrivateWindow(callerInnerWindow);
data.innerWindowId() = callerInnerWindow ? callerInnerWindow->WindowID() : 0;
data.scriptLocation() = scriptLocation;
JS::Rooted<JS::Value> transferArray(aCx);
aError = nsContentUtils::CreateJSValueFromSequenceOfObject(aCx, aTransfer,
&transferArray);
if (NS_WARN_IF(aError.Failed())) {
return;
}
ipc::StructuredCloneData message;
message.Write(aCx, aMessage, transferArray, JS::CloneDataPolicy(), aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
ClonedMessageData messageData;
if (ContentChild* cc = ContentChild::GetSingleton()) {
if (!message.BuildClonedMessageDataForChild(cc, messageData)) {
aError.Throw(NS_ERROR_FAILURE);
return;
}
cc->SendWindowPostMessage(this, messageData, data);
} else if (ContentParent* cp = Canonical()->GetContentParent()) {
if (!message.BuildClonedMessageDataForParent(cp, messageData)) {
aError.Throw(NS_ERROR_FAILURE);
return;
}
Unused << cp->SendWindowPostMessage(this, messageData, data);
}
}
void BrowsingContext::PostMessageMoz(JSContext* aCx,
JS::Handle<JS::Value> aMessage,
const WindowPostMessageOptions& aOptions,
nsIPrincipal& aSubjectPrincipal,
ErrorResult& aError) {
PostMessageMoz(aCx, aMessage, aOptions.mTargetOrigin, aOptions.mTransfer,
aSubjectPrincipal, aError);
}
void BrowsingContext::SendCommitTransaction(ContentParent* aParent,
const BaseTransaction& aTxn,
uint64_t aEpoch) {
Unused << aParent->SendCommitBrowsingContextTransaction(this, aTxn, aEpoch);
}
void BrowsingContext::SendCommitTransaction(ContentChild* aChild,
const BaseTransaction& aTxn,
uint64_t aEpoch) {
aChild->SendCommitBrowsingContextTransaction(this, aTxn, aEpoch);
}
BrowsingContext::IPCInitializer BrowsingContext::GetIPCInitializer() {
MOZ_DIAGNOSTIC_ASSERT(mEverAttached);
MOZ_DIAGNOSTIC_ASSERT(mType == Type::Content);
IPCInitializer init;
init.mId = Id();
init.mParentId = mParent ? mParent->Id() : 0;
init.mCached = IsCached();
init.mWindowless = mWindowless;
init.mFields = mFields.Fields();
return init;
}
already_AddRefed<BrowsingContext> BrowsingContext::IPCInitializer::GetParent() {
RefPtr<BrowsingContext> parent;
if (mParentId != 0) {
parent = BrowsingContext::Get(mParentId);
MOZ_RELEASE_ASSERT(parent);
}
return parent.forget();
}
already_AddRefed<BrowsingContext> BrowsingContext::IPCInitializer::GetOpener() {
RefPtr<BrowsingContext> opener;
if (GetOpenerId() != 0) {
opener = BrowsingContext::Get(GetOpenerId());
MOZ_RELEASE_ASSERT(opener);
}
return opener.forget();
}
void BrowsingContext::StartDelayedAutoplayMediaComponents() {
if (!mDocShell) {
return;
}
AUTOPLAY_LOG("%s : StartDelayedAutoplayMediaComponents for bc 0x%08" PRIx64,
XRE_IsParentProcess() ? "Parent" : "Child", Id());
mDocShell->StartDelayedAutoplayMediaComponents();
}
void BrowsingContext::ResetGVAutoplayRequestStatus() {
MOZ_ASSERT(IsTop(),
"Should only set GVAudibleAutoplayRequestStatus in the top-level "
"browsing context");
SetGVAudibleAutoplayRequestStatus(GVAutoplayRequestStatus::eUNKNOWN);
SetGVInaudibleAutoplayRequestStatus(GVAutoplayRequestStatus::eUNKNOWN);
}
void BrowsingContext::DidSet(FieldIndex<IDX_GVAudibleAutoplayRequestStatus>) {
MOZ_ASSERT(IsTop(),
"Should only set GVAudibleAutoplayRequestStatus in the top-level "
"browsing context");
}
void BrowsingContext::DidSet(FieldIndex<IDX_GVInaudibleAutoplayRequestStatus>) {
MOZ_ASSERT(IsTop(),
"Should only set GVAudibleAutoplayRequestStatus in the top-level "
"browsing context");
}
void BrowsingContext::DidSet(FieldIndex<IDX_UserActivationState>) {
MOZ_ASSERT_IF(!mIsInProcess, mUserGestureStart.IsNull());
USER_ACTIVATION_LOG("Set user gesture activation %" PRIu8
" for %s browsing context 0x%08" PRIx64,
static_cast<uint8_t>(GetUserActivationState()),
XRE_IsParentProcess() ? "Parent" : "Child", Id());
if (mIsInProcess) {
USER_ACTIVATION_LOG(
"Set user gesture start time for %s browsing context 0x%08" PRIx64,
XRE_IsParentProcess() ? "Parent" : "Child", Id());
mUserGestureStart =
(GetUserActivationState() == UserActivation::State::FullActivated)
? TimeStamp::Now()
: TimeStamp();
}
}
void BrowsingContext::DidSet(FieldIndex<IDX_Muted>) {
MOZ_ASSERT(!mParent, "Set muted flag on non top-level context!");
USER_ACTIVATION_LOG("Set audio muted %d for %s browsing context 0x%08" PRIx64,
GetMuted(), XRE_IsParentProcess() ? "Parent" : "Child",
Id());
PreOrderWalk([&](BrowsingContext* aContext) {
nsPIDOMWindowOuter* win = aContext->GetDOMWindow();
if (win) {
win->RefreshMediaElementsVolume();
}
});
}
void BrowsingContext::SetCustomUserAgent(const nsAString& aUserAgent) {
Top()->SetUserAgentOverride(aUserAgent);
}
void BrowsingContext::DidSet(FieldIndex<IDX_UserAgentOverride>) {
MOZ_ASSERT(IsTop());
PreOrderWalk([&](BrowsingContext* aContext) {
nsIDocShell* shell = aContext->GetDocShell();
if (shell) {
shell->ClearCachedUserAgent();
}
});
}
bool BrowsingContext::CanSet(FieldIndex<IDX_UserAgentOverride>,
const nsString& aUserAgent,
ContentParent* aSource) {
if (!IsTop()) {
return false;
}
if (aSource) {
MOZ_ASSERT(XRE_IsParentProcess());
// Double-check ownership if we aren't the setter.
if (!Canonical()->IsOwnedByProcess(aSource->ChildID()) &&
aSource->ChildID() != Canonical()->GetInFlightProcessId()) {
return false;
}
} else if (!IsInProcess() && !XRE_IsParentProcess()) {
// Don't allow this to be set from content processes that
// don't own the BrowsingContext.
return false;
}
return true;
}
bool BrowsingContext::CheckOnlyEmbedderCanSet(ContentParent* aSource) {
if (aSource) {
// Set by a content process, verify that it's this BC's embedder.
MOZ_ASSERT(XRE_IsParentProcess());
return Canonical()->IsEmbeddedInProcess(aSource->ChildID());
}
// In-process case, verify that we've been embedded in this process.
return mEmbeddedByThisProcess;
}
bool BrowsingContext::CanSet(FieldIndex<IDX_EmbedderInnerWindowId>,
const uint64_t& aValue, ContentParent* aSource) {
// Generally allow clearing this. We may want to be more precise about this
// check in the future.
if (aValue == 0) {
return true;
}
// If we don't have a specified source, we're the setting process. The window
// which we're setting this to must be in-process.
RefPtr<BrowsingContext> impliedParent;
if (!aSource) {
nsGlobalWindowInner* innerWindow =
nsGlobalWindowInner::GetInnerWindowWithId(aValue);
if (NS_WARN_IF(!innerWindow)) {
return false;
}
impliedParent = innerWindow->GetBrowsingContext();
}
// If in the parent process, double-check ownership and WindowGlobalParent as
// well.
if (XRE_IsParentProcess()) {
RefPtr<WindowGlobalParent> wgp =
WindowGlobalParent::GetByInnerWindowId(aValue);
if (NS_WARN_IF(!wgp)) {
return false;
}
// Deduce the implied parent from the WindowGlobalParent actor.
if (impliedParent) {
MOZ_ASSERT(impliedParent == wgp->BrowsingContext());
}
impliedParent = wgp->BrowsingContext();
// Double-check ownership if we aren't the setter.
if (aSource &&
!impliedParent->Canonical()->IsOwnedByProcess(aSource->ChildID()) &&
aSource->ChildID() !=
impliedParent->Canonical()->GetInFlightProcessId()) {
return false;
}
}
// If we would have an invalid implied parent, something has gone wrong.
MOZ_ASSERT(impliedParent);
if (NS_WARN_IF(mParent && mParent != impliedParent)) {
return false;
}
return true;
}
bool BrowsingContext::CanSet(FieldIndex<IDX_EmbedderElementType>,
const Maybe<nsString>&, ContentParent* aSource) {
return CheckOnlyEmbedderCanSet(aSource);
}
bool BrowsingContext::CanSet(FieldIndex<IDX_CurrentInnerWindowId>,
const uint64_t& aValue, ContentParent* aSource) {
// Generally allow clearing this. We may want to be more precise about this
// check in the future.
if (aValue == 0) {
return true;
}
if (aSource) {
MOZ_ASSERT(XRE_IsParentProcess());
// If in the parent process, double-check ownership and WindowGlobalParent
// as well.
RefPtr<WindowGlobalParent> wgp =
WindowGlobalParent::GetByInnerWindowId(aValue);
if (NS_WARN_IF(!wgp) || NS_WARN_IF(wgp->BrowsingContext() != this)) {
return false;
}
// Double-check ownership if we aren't the setter.
if (!Canonical()->IsOwnedByProcess(aSource->ChildID()) &&
aSource->ChildID() != Canonical()->GetInFlightProcessId()) {
return false;
}
}
// We must have access to the specified context.
RefPtr<WindowContext> window = WindowContext::GetById(aValue);
return window && window->GetBrowsingContext() == this;
}
void BrowsingContext::DidSet(FieldIndex<IDX_CurrentInnerWindowId>) {
mCurrentWindowContext = WindowContext::GetById(GetCurrentInnerWindowId());
if (XRE_IsParentProcess()) {
BrowserParent::UpdateFocusFromBrowsingContext();
}
}
bool BrowsingContext::CanSet(FieldIndex<IDX_IsPopupSpam>, const bool& aValue,
ContentParent* aSource) {
// Ensure that we only mark a browsing context as popup spam once and never
// unmark it.
return aValue && !GetIsPopupSpam();
}
void BrowsingContext::DidSet(FieldIndex<IDX_IsPopupSpam>) {
if (GetIsPopupSpam()) {
PopupBlocker::RegisterOpenPopupSpam();
}
}
bool BrowsingContext::IsLoading() {
if (GetLoading()) {
return true;
}
// If we're in the same process as the page, we're possibly just
// updating the flag.
nsIDocShell* shell = GetDocShell();
if (shell) {
Document* doc = shell->GetDocument();
return doc && doc->GetReadyStateEnum() < Document::READYSTATE_COMPLETE;
}
return false;
}
void BrowsingContext::DidSet(FieldIndex<IDX_Loading>) {
if (mFields.Get<IDX_Loading>()) {
return;
}
while (!mDeprioritizedLoadRunner.isEmpty()) {
nsCOMPtr<nsIRunnable> runner = mDeprioritizedLoadRunner.popFirst();
NS_DispatchToCurrentThread(runner.forget());
}
if (StaticPrefs::dom_separate_event_queue_for_post_message_enabled() &&
Top() == this) {
Group()->FlushPostMessageEvents();
}
}
// Inform the Document for this context of the (potential) change in
// loading state
void BrowsingContext::DidSet(FieldIndex<IDX_AncestorLoading>) {
nsPIDOMWindowOuter* outer = GetDOMWindow();
if (!outer) {
MOZ_LOG(gTimeoutDeferralLog, mozilla::LogLevel::Debug,
("DidSetAncestorLoading BC: %p -- No outer window", (void*)this));
return;
}
Document* document = nsGlobalWindowOuter::Cast(outer)->GetExtantDoc();
if (document) {
MOZ_LOG(gTimeoutDeferralLog, mozilla::LogLevel::Debug,
("DidSetAncestorLoading BC: %p -- NotifyLoading(%d, %d, %d)",
(void*)this, GetAncestorLoading(), document->GetReadyStateEnum(),
document->GetReadyStateEnum()));
document->NotifyLoading(GetAncestorLoading(), document->GetReadyStateEnum(),
document->GetReadyStateEnum());
}
}
void BrowsingContext::AddDeprioritizedLoadRunner(nsIRunnable* aRunner) {
MOZ_ASSERT(IsLoading());
MOZ_ASSERT(Top() == this);
RefPtr<DeprioritizedLoadRunner> runner = new DeprioritizedLoadRunner(aRunner);
mDeprioritizedLoadRunner.insertBack(runner);
NS_DispatchToCurrentThreadQueue(
runner.forget(), StaticPrefs::page_load_deprioritization_period(),
EventQueuePriority::Idle);
}
} // namespace dom
namespace ipc {
void IPDLParamTraits<dom::MaybeDiscarded<dom::BrowsingContext>>::Write(
IPC::Message* aMsg, IProtocol* aActor,
const dom::MaybeDiscarded<dom::BrowsingContext>& aParam) {
MOZ_DIAGNOSTIC_ASSERT(!aParam.GetMaybeDiscarded() ||
aParam.GetMaybeDiscarded()->EverAttached());
uint64_t id = aParam.ContextId();
WriteIPDLParam(aMsg, aActor, id);
}
bool IPDLParamTraits<dom::MaybeDiscarded<dom::BrowsingContext>>::Read(
const IPC::Message* aMsg, PickleIterator* aIter, IProtocol* aActor,
dom::MaybeDiscarded<dom::BrowsingContext>* aResult) {
uint64_t id = 0;
if (!ReadIPDLParam(aMsg, aIter, aActor, &id)) {
return false;
}
if (id == 0) {
*aResult = nullptr;
} else if (RefPtr<dom::BrowsingContext> bc = dom::BrowsingContext::Get(id)) {
*aResult = std::move(bc);
} else {
aResult->SetDiscarded(id);
}
return true;
}
void IPDLParamTraits<dom::BrowsingContext::IPCInitializer>::Write(
IPC::Message* aMessage, IProtocol* aActor,
const dom::BrowsingContext::IPCInitializer& aInit) {
// Write actor ID parameters.
WriteIPDLParam(aMessage, aActor, aInit.mId);
WriteIPDLParam(aMessage, aActor, aInit.mParentId);
WriteIPDLParam(aMessage, aActor, aInit.mCached);
WriteIPDLParam(aMessage, aActor, aInit.mWindowless);
WriteIPDLParam(aMessage, aActor, aInit.mFields);
}
bool IPDLParamTraits<dom::BrowsingContext::IPCInitializer>::Read(
const IPC::Message* aMessage, PickleIterator* aIterator, IProtocol* aActor,
dom::BrowsingContext::IPCInitializer* aInit) {
// Read actor ID parameters.
if (!ReadIPDLParam(aMessage, aIterator, aActor, &aInit->mId) ||
!ReadIPDLParam(aMessage, aIterator, aActor, &aInit->mParentId) ||
!ReadIPDLParam(aMessage, aIterator, aActor, &aInit->mCached) ||
!ReadIPDLParam(aMessage, aIterator, aActor, &aInit->mWindowless) ||
!ReadIPDLParam(aMessage, aIterator, aActor, &aInit->mFields)) {
return false;
}
return true;
}
template struct IPDLParamTraits<dom::BrowsingContext::BaseTransaction>;
} // namespace ipc
} // namespace mozilla
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