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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
/*
* Class for managing loading of a subframe (creation of the docshell,
* handling of loads in it, recursion-checking).
*/
#include "nsFrameLoader.h"
#include "base/basictypes.h"
#include "prenv.h"
#include "nsDocShell.h"
#include "nsIContentInlines.h"
#include "nsIDocumentViewer.h"
#include "nsIPrintSettings.h"
#include "nsIPrintSettingsService.h"
#include "mozilla/dom/Document.h"
#include "nsPIDOMWindow.h"
#include "nsIWebNavigation.h"
#include "nsIWebProgress.h"
#include "nsIDocShell.h"
#include "nsIDocShellTreeOwner.h"
#include "nsDocShellLoadState.h"
#include "nsIBaseWindow.h"
#include "nsIBrowser.h"
#include "nsContentUtils.h"
#include "nsUnicharUtils.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptSecurityManager.h"
#include "nsFrameLoaderOwner.h"
#include "nsIFrame.h"
#include "nsSubDocumentFrame.h"
#include "nsError.h"
#include "nsIAppWindow.h"
#include "nsIScriptError.h"
#include "nsGlobalWindowInner.h"
#include "nsGlobalWindowOuter.h"
#include "nsHTMLDocument.h"
#include "nsPIWindowRoot.h"
#include "nsLayoutUtils.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsBaseWidget.h"
#include "nsQueryObject.h"
#include "ReferrerInfo.h"
#include "nsIOpenWindowInfo.h"
#include "nsISHistory.h"
#include "nsIURI.h"
#include "nsIXULRuntime.h"
#include "nsNetUtil.h"
#include "nsFocusManager.h"
#include "nsIINIParser.h"
#include "nsAppRunner.h"
#include "nsDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsGkAtoms.h"
#include "nsNameSpaceManager.h"
#include "nsThreadUtils.h"
#include "InProcessBrowserChildMessageManager.h"
#include "ContentParent.h"
#include "BrowserParent.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/ExpandedPrincipal.h"
#include "mozilla/FlushType.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/NullPrincipal.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/PresShellInlines.h"
#include "mozilla/ProcessPriorityManager.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/ScrollContainerFrame.h"
#include "mozilla/StaticPrefs_fission.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/ChromeMessageSender.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/FrameCrashedEvent.h"
#include "mozilla/dom/FrameLoaderBinding.h"
#include "mozilla/dom/InProcessChild.h"
#include "mozilla/dom/MozFrameLoaderOwnerBinding.h"
#include "mozilla/dom/PBrowser.h"
#include "mozilla/dom/SessionHistoryEntry.h"
#include "mozilla/dom/SessionStoreChild.h"
#include "mozilla/dom/SessionStoreParent.h"
#include "mozilla/dom/SessionStoreUtils.h"
#include "mozilla/dom/WindowGlobalParent.h"
#include "mozilla/dom/XULFrameElement.h"
#include "mozilla/gfx/CrossProcessPaint.h"
#include "mozilla/ProfilerLabels.h"
#include "nsGenericHTMLFrameElement.h"
#include "jsapi.h"
#include "mozilla/dom/HTMLIFrameElement.h"
#include "nsSandboxFlags.h"
#include "mozilla/layers/CompositorBridgeChild.h"
#include "mozilla/dom/CustomEvent.h"
#include "mozilla/dom/ipc/StructuredCloneData.h"
#include "mozilla/WebBrowserPersistLocalDocument.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PromiseNativeHandler.h"
#include "mozilla/dom/ChildSHistory.h"
#include "mozilla/dom/CanonicalBrowsingContext.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentProcessManager.h"
#include "mozilla/dom/BrowserBridgeChild.h"
#include "mozilla/dom/BrowserHost.h"
#include "mozilla/dom/BrowserBridgeHost.h"
#include "mozilla/dom/BrowsingContextGroup.h"
#include "mozilla/dom/SessionStorageManager.h"
#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/ipc/PBackgroundChild.h"
#include "mozilla/dom/PBackgroundSessionStorageCache.h"
#include "mozilla/ipc/BackgroundUtils.h"
#include "mozilla/dom/HTMLBodyElement.h"
#include "mozilla/ContentPrincipal.h"
#include "buildid_section.h"
#include "mozilla/toolkit/library/buildid_reader_ffi.h"
#include "nsXPCOMPrivate.h" // for XUL_DLL
#include "nsXULPopupManager.h"
#ifdef NS_PRINTING
# include "nsIWebBrowserPrint.h"
#endif
#if defined(MOZ_TELEMETRY_REPORTING)
# include "mozilla/glean/DomMetrics.h"
#endif // defined(MOZ_TELEMETRY_REPORTING)
using namespace mozilla;
using namespace mozilla::hal;
using namespace mozilla::dom;
using namespace mozilla::dom::ipc;
using namespace mozilla::ipc;
using namespace mozilla::layers;
using namespace mozilla::layout;
using ViewID = ScrollableLayerGuid::ViewID;
using PrintPreviewResolver = std::function<void(const PrintPreviewResultInfo&)>;
// does not count chrome frames when determining depth, nor does it
// prevent chrome recursion. Number is fairly arbitrary, but meant to
// keep number of shells to a reasonable number on accidental recursion with a
// small (but not 1) branching factor. With large branching factors the number
// of shells can rapidly become huge and run us out of memory. To solve that,
#define MAX_DEPTH_CONTENT_FRAMES 10
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsFrameLoader, mPendingBrowsingContext,
mMessageManager, mChildMessageManager,
mRemoteBrowser, mSessionStoreChild)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsFrameLoader)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsFrameLoader)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsFrameLoader)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY_CONCRETE(nsFrameLoader)
NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
nsFrameLoader::nsFrameLoader(Element* aOwner, BrowsingContext* aBrowsingContext,
bool aIsRemoteFrame, bool aNetworkCreated)
: mPendingBrowsingContext(aBrowsingContext),
mOwnerContent(aOwner),
mDetachedSubdocFrame(nullptr),
mPendingSwitchID(0),
mChildID(0),
mRemoteType(NOT_REMOTE_TYPE),
mInitialized(false),
mDepthTooGreat(false),
mIsTopLevelContent(false),
mDestroyCalled(false),
mNeedsAsyncDestroy(false),
mInSwap(false),
mInShow(false),
mHideCalled(false),
mNetworkCreated(aNetworkCreated),
mLoadingOriginalSrc(false),
mShouldCheckForRecursion(false),
mRemoteBrowserShown(false),
mRemoteBrowserSized(false),
mIsRemoteFrame(aIsRemoteFrame),
mWillChangeProcess(false),
mObservingOwnerContent(false),
mHadDetachedFrame(false),
mTabProcessCrashFired(false) {
nsCOMPtr<nsFrameLoaderOwner> owner = do_QueryInterface(aOwner);
owner->AttachFrameLoader(this);
}
nsFrameLoader::~nsFrameLoader() {
if (mMessageManager) {
mMessageManager->Disconnect();
}
MOZ_ASSERT(!mOwnerContent);
MOZ_RELEASE_ASSERT(mDestroyCalled);
}
static nsAtom* TypeAttrName(Element* aOwnerContent) {
return aOwnerContent->IsXULElement() ? nsGkAtoms::type
: nsGkAtoms::mozframetype;
}
static void GetFrameName(Element* aOwnerContent, nsAString& aFrameName) {
int32_t namespaceID = aOwnerContent->GetNameSpaceID();
if (namespaceID == kNameSpaceID_XHTML && !aOwnerContent->IsInHTMLDocument()) {
aOwnerContent->GetAttr(nsGkAtoms::id, aFrameName);
} else {
aOwnerContent->GetAttr(nsGkAtoms::name, aFrameName);
// XXX if no NAME then use ID, after a transition period this will be
if (aFrameName.IsEmpty() && namespaceID == kNameSpaceID_XUL) {
aOwnerContent->GetAttr(nsGkAtoms::id, aFrameName);
}
}
}
// If this method returns true, the nsFrameLoader will act as a boundary, as is
// the case for <iframe mozbrowser> and <browser type="content"> elements.
//
// # Historical Notes (10 April 2019)
//
// In the past, this boundary was defined by the "typeContent" and "typeChrome"
// nsIDocShellTreeItem types. There was only ever a single split in the tree,
// and it occurred at the boundary between these two types of docshells. When
// <iframe mozbrowser> was introduced, it was given special casing to make it
// act like a second boundary, without having to change the existing code.
//
// The about:addons page, which is loaded within a content browser, then added a
// remote <browser type="content" remote="true"> element. When remote, this
// would also act as a mechanism for creating a disjoint tree, due to the
// process keeping the embedder and embedee separate.
//
// However, when initial out-of-process iframe support was implemented, this
// codepath became a risk, as it could've caused the oop iframe remote
// WindowProxy code to be activated for the addons page. This was fixed by
// extendng the isolation logic previously reserved to <iframe mozbrowser> to
// also cover <browser> elements with the explicit `remote` property loaded in
// content.
//
// To keep these boundaries clear, and allow them to work in a cross-process
// manner, they are no longer handled by typeContent and typeChrome. Instead,
// the actual BrowsingContext tree is broken at these edges.
static bool IsTopContent(BrowsingContext* aParent, Element* aOwner) {
if (XRE_IsContentProcess()) {
return false;
}
if (aParent->IsContent()) {
// If we're already in content, we may still want to create a new
// BrowsingContext tree if our element is a xul browser element with a
// `remote="true"` marker.
return aOwner->IsXULElement() &&
aOwner->AttrValueIs(kNameSpaceID_None, nsGkAtoms::remote,
nsGkAtoms::_true, eCaseMatters);
}
// If we're in a chrome context, we want to start a new tree if we are an
// element with a `type="content"` marker.
return aOwner->AttrValueIs(kNameSpaceID_None, TypeAttrName(aOwner),
nsGkAtoms::content, eIgnoreCase);
}
static already_AddRefed<BrowsingContext> CreateBrowsingContext(
Element* aOwner, nsIOpenWindowInfo* aOpenWindowInfo,
BrowsingContextGroup* aSpecificGroup, bool aNetworkCreated = false) {
MOZ_ASSERT(!aOpenWindowInfo || !aSpecificGroup,
"Only one of SpecificGroup and OpenWindowInfo may be provided!");
// If we've got a pending BrowserParent from the content process, use the
// BrowsingContext which was created for it.
if (aOpenWindowInfo && aOpenWindowInfo->GetNextRemoteBrowser()) {
MOZ_ASSERT(XRE_IsParentProcess());
return do_AddRef(
aOpenWindowInfo->GetNextRemoteBrowser()->GetBrowsingContext());
}
RefPtr<BrowsingContext> opener;
if (aOpenWindowInfo && !aOpenWindowInfo->GetForceNoOpener()) {
opener = aOpenWindowInfo->GetParent();
if (opener) {
// Must create BrowsingContext with opener in-process.
MOZ_ASSERT(opener->IsInProcess());
// This can only happen when the opener was closed from a nested event
// loop in the window provider code, and only when the open was triggered
// by a non-e10s tab, and the new tab is being opened in a new browser
// window. Since it is a corner case among corner cases, and the opener
// window will appear to be null to consumers after it is discarded
// anyway, just drop the opener entirely.
if (opener->IsDiscarded()) {
NS_WARNING(
"Opener was closed from a nested event loop in the parent process. "
"Please fix this.");
opener = nullptr;
}
}
}
RefPtr<nsGlobalWindowInner> parentInner =
nsGlobalWindowInner::Cast(aOwner->OwnerDoc()->GetInnerWindow());
if (NS_WARN_IF(!parentInner) || parentInner->IsDying()) {
return nullptr;
}
BrowsingContext* parentBC = parentInner->GetBrowsingContext();
if (NS_WARN_IF(!parentBC) || parentBC->IsDiscarded()) {
return nullptr;
}
// Determine the frame name for the new browsing context.
nsAutoString frameName;
GetFrameName(aOwner, frameName);
// Create our BrowsingContext without immediately attaching it. It's possible
// that no DocShell or remote browser will ever be created for this
// FrameLoader, particularly if the document that we were created for is not
// currently active. And in that latter case, if we try to attach our BC now,
// it will wind up attached as a child of the currently active inner window
// for the BrowsingContext, and cause no end of trouble.
if (IsTopContent(parentBC, aOwner)) {
BrowsingContext::CreateDetachedOptions options;
if (aOpenWindowInfo) {
options.topLevelCreatedByWebContent =
aOpenWindowInfo->GetIsTopLevelCreatedByWebContent();
}
options.windowless = parentBC->Windowless();
// Create toplevel context without a parent & as Type::Content.
return BrowsingContext::CreateDetached(
nullptr, opener, aSpecificGroup, frameName,
BrowsingContext::Type::Content, options);
}
MOZ_ASSERT(!aOpenWindowInfo,
"Can't have openWindowInfo for non-toplevel context");
MOZ_ASSERT(!aSpecificGroup,
"Can't force BrowsingContextGroup for non-toplevel context");
return BrowsingContext::CreateDetached(
parentInner, nullptr, nullptr, frameName, parentBC->GetType(),
{.createdDynamically = !aNetworkCreated,
.windowless = parentBC->Windowless()});
}
static bool InitialLoadIsRemote(Element* aOwner) {
// The initial load in an content process iframe should never be made remote.
// Content process iframes always become remote due to navigation.
if (XRE_IsContentProcess()) {
return false;
}
// Otherwise, we're remote if we have "remote=true" and we're a XUL element.
return (aOwner->GetNameSpaceID() == kNameSpaceID_XUL) &&
aOwner->AttrValueIs(kNameSpaceID_None, nsGkAtoms::remote,
nsGkAtoms::_true, eCaseMatters);
}
static already_AddRefed<BrowsingContextGroup> InitialBrowsingContextGroup(
Element* aOwner) {
nsAutoString attrString;
if (aOwner->GetNameSpaceID() != kNameSpaceID_XUL ||
!aOwner->GetAttr(nsGkAtoms::initialBrowsingContextGroupId, attrString)) {
return nullptr;
}
// It's OK to read the attribute using a signed 64-bit integer parse, as an ID
// generated using `nsContentUtils::GenerateProcessSpecificId` (like BCG IDs)
// will only ever use 53 bits of precision, so it can be round-tripped through
// a JS number.
nsresult rv = NS_OK;
int64_t signedGroupId = attrString.ToInteger64(&rv, 10);
if (NS_FAILED(rv) || signedGroupId <= 0) {
MOZ_DIAGNOSTIC_ASSERT(
false, "we intended to have a particular id, but failed to parse it!");
return nullptr;
}
return BrowsingContextGroup::GetOrCreate(uint64_t(signedGroupId));
}
already_AddRefed<nsFrameLoader> nsFrameLoader::Create(
Element* aOwner, bool aNetworkCreated, nsIOpenWindowInfo* aOpenWindowInfo) {
NS_ENSURE_TRUE(aOwner, nullptr);
Document* doc = aOwner->OwnerDoc();
// We never create nsFrameLoaders for elements in resource documents.
//
// We never create nsFrameLoaders for elements in data documents, unless the
// document is a static document.
// Static documents are an exception because any sub-documents need an
// nsFrameLoader to keep the relevant docShell alive, even though the
// nsFrameLoader isn't used to load anything (the sub-document is created by
// the static clone process).
//
// We never create nsFrameLoaders for elements that are not
// in-composed-document, unless the element belongs to a static document.
// Static documents are an exception because this method is called at a point
// in the static clone process before aOwner has been inserted into its
// document. For other types of documents this wouldn't be a problem since
// we'd create the nsFrameLoader as necessary after aOwner is inserted into a
// document, but the mechanisms that take care of that don't apply for static
// documents so we need to create the nsFrameLoader now. (This isn't wasteful
// since for a static document we know aOwner will end up in a document and
// the nsFrameLoader will be used for its docShell.)
//
NS_ENSURE_TRUE(!doc->IsResourceDoc() &&
((!doc->IsLoadedAsData() && aOwner->IsInComposedDoc()) ||
doc->IsStaticDocument()),
nullptr);
RefPtr<BrowsingContextGroup> group = InitialBrowsingContextGroup(aOwner);
RefPtr<BrowsingContext> context =
CreateBrowsingContext(aOwner, aOpenWindowInfo, group, aNetworkCreated);
NS_ENSURE_TRUE(context, nullptr);
if (XRE_IsParentProcess() && aOpenWindowInfo) {
MOZ_ASSERT(context->IsTopContent());
if (RefPtr<BrowsingContext> crossGroupOpener =
aOpenWindowInfo->GetParent()) {
context->Canonical()->SetCrossGroupOpenerId(crossGroupOpener->Id());
}
}
bool isRemoteFrame = InitialLoadIsRemote(aOwner);
RefPtr<nsFrameLoader> fl =
new nsFrameLoader(aOwner, context, isRemoteFrame, aNetworkCreated);
fl->mOpenWindowInfo = aOpenWindowInfo;
// If this is a toplevel initial remote frame, we're looking at a browser
// loaded in the parent process. Pull the remote type attribute off of the
// <browser> element to determine which remote type it should be loaded in, or
// use `DEFAULT_REMOTE_TYPE` if we can't tell.
if (isRemoteFrame) {
MOZ_ASSERT(XRE_IsParentProcess());
nsAutoString remoteType;
if (aOwner->GetAttr(nsGkAtoms::RemoteType, remoteType) &&
!remoteType.IsEmpty()) {
CopyUTF16toUTF8(remoteType, fl->mRemoteType);
} else {
fl->mRemoteType = DEFAULT_REMOTE_TYPE;
}
}
return fl.forget();
}
/* static */
already_AddRefed<nsFrameLoader> nsFrameLoader::Recreate(
mozilla::dom::Element* aOwner, BrowsingContext* aContext,
BrowsingContextGroup* aSpecificGroup,
const NavigationIsolationOptions& aRemotenessOptions, bool aIsRemote,
bool aNetworkCreated, bool aPreserveContext) {
NS_ENSURE_TRUE(aOwner, nullptr);
#ifdef DEBUG
// This version of Create is only called for Remoteness updates, so we can
// assume we need a FrameLoader here and skip the check in the other Create.
Document* doc = aOwner->OwnerDoc();
MOZ_ASSERT(!doc->IsResourceDoc());
MOZ_ASSERT((!doc->IsLoadedAsData() && aOwner->IsInComposedDoc()) ||
doc->IsStaticDocument());
#endif
RefPtr<BrowsingContext> context = aContext;
if (!context || !aPreserveContext) {
context = CreateBrowsingContext(aOwner, /* openWindowInfo */ nullptr,
aSpecificGroup);
if (aContext) {
MOZ_ASSERT(
XRE_IsParentProcess(),
"Recreating browing contexts only supported in the parent process");
aContext->Canonical()->SynchronizeLayoutHistoryState();
aContext->Canonical()->ReplacedBy(context->Canonical(),
aRemotenessOptions);
}
}
NS_ENSURE_TRUE(context, nullptr);
RefPtr<nsFrameLoader> fl =
new nsFrameLoader(aOwner, context, aIsRemote, aNetworkCreated);
return fl.forget();
}
void nsFrameLoader::LoadFrame(bool aOriginalSrc,
bool aShouldCheckForRecursion) {
if (NS_WARN_IF(!mOwnerContent)) {
return;
}
nsAutoString src;
nsCOMPtr<nsIPrincipal> principal;
nsCOMPtr<nsIContentSecurityPolicy> csp;
bool isSrcdoc = mOwnerContent->IsHTMLElement(nsGkAtoms::iframe) &&
mOwnerContent->HasAttr(nsGkAtoms::srcdoc);
if (isSrcdoc) {
src.AssignLiteral("about:srcdoc");
principal = mOwnerContent->NodePrincipal();
csp = mOwnerContent->GetCsp();
} else {
GetURL(src, getter_AddRefs(principal), getter_AddRefs(csp));
src.Trim(" \t\n\r");
if (src.IsEmpty()) {
// If the frame is a XUL element and has the attribute 'nodefaultsrc=true'
// then we will not use 'about:blank' as fallback but return early without
// starting a load if no 'src' attribute is given (or it's empty).
if (mOwnerContent->IsXULElement() &&
mOwnerContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::nodefaultsrc,
nsGkAtoms::_true, eCaseMatters)) {
return;
}
src.AssignLiteral("about:blank");
principal = mOwnerContent->NodePrincipal();
csp = mOwnerContent->GetCsp();
}
}
Document* doc = mOwnerContent->OwnerDoc();
if (doc->IsStaticDocument()) {
return;
}
// If we are being loaded by a lazy loaded iframe, use its base URI first
// instead of the current base URI.
auto* lazyBaseURI = GetLazyLoadFrameResumptionState().mBaseURI.get();
nsIURI* baseURI = lazyBaseURI ? lazyBaseURI : mOwnerContent->GetBaseURI();
auto encoding = doc->GetDocumentCharacterSet();
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), src, encoding, baseURI);
// If the URI was malformed, try to recover by loading about:blank.
if (rv == NS_ERROR_MALFORMED_URI) {
rv = NS_NewURI(getter_AddRefs(uri), u"about:blank"_ns, encoding, baseURI);
}
if (NS_SUCCEEDED(rv)) {
rv = LoadURI(uri, principal, csp, aOriginalSrc, aShouldCheckForRecursion);
}
if (NS_FAILED(rv)) {
FireErrorEvent();
}
}
void nsFrameLoader::ConfigRemoteProcess(const nsACString& aRemoteType,
ContentParent* aContentParent) {
MOZ_DIAGNOSTIC_ASSERT(IsRemoteFrame(), "Must be a remote frame");
MOZ_DIAGNOSTIC_ASSERT(!mRemoteBrowser, "Must not have a browser yet");
MOZ_DIAGNOSTIC_ASSERT_IF(aContentParent,
aContentParent->GetRemoteType() == aRemoteType);
mRemoteType = aRemoteType;
mChildID = aContentParent ? aContentParent->ChildID() : 0;
}
void nsFrameLoader::FireErrorEvent() {
if (!mOwnerContent) {
return;
}
RefPtr<AsyncEventDispatcher> loadBlockingAsyncDispatcher =
new LoadBlockingAsyncEventDispatcher(
mOwnerContent, u"error"_ns, CanBubble::eNo, ChromeOnlyDispatch::eNo);
loadBlockingAsyncDispatcher->PostDOMEvent();
}
nsresult nsFrameLoader::LoadURI(nsIURI* aURI,
nsIPrincipal* aTriggeringPrincipal,
nsIContentSecurityPolicy* aCsp,
bool aOriginalSrc,
bool aShouldCheckForRecursion) {
if (!aURI) return NS_ERROR_INVALID_POINTER;
NS_ENSURE_STATE(!mDestroyCalled && mOwnerContent);
MOZ_ASSERT(
aTriggeringPrincipal,
"Must have an explicit triggeringPrincipal to nsFrameLoader::LoadURI.");
mLoadingOriginalSrc = aOriginalSrc;
mShouldCheckForRecursion = aShouldCheckForRecursion;
nsCOMPtr<Document> doc = mOwnerContent->OwnerDoc();
nsresult rv;
rv = CheckURILoad(aURI, aTriggeringPrincipal);
NS_ENSURE_SUCCESS(rv, rv);
mURIToLoad = aURI;
mTriggeringPrincipal = aTriggeringPrincipal;
mCsp = aCsp;
rv = doc->InitializeFrameLoader(this);
if (NS_FAILED(rv)) {
mURIToLoad = nullptr;
mTriggeringPrincipal = nullptr;
mCsp = nullptr;
}
return rv;
}
void nsFrameLoader::ResumeLoad(uint64_t aPendingSwitchID) {
Document* doc = mOwnerContent->OwnerDoc();
if (doc->IsStaticDocument()) {
// Static doc shouldn't load sub-documents.
return;
}
if (NS_WARN_IF(mDestroyCalled || !mOwnerContent)) {
FireErrorEvent();
return;
}
mLoadingOriginalSrc = false;
mShouldCheckForRecursion = false;
mURIToLoad = nullptr;
mPendingSwitchID = aPendingSwitchID;
mTriggeringPrincipal = mOwnerContent->NodePrincipal();
mCsp = mOwnerContent->GetCsp();
nsresult rv = doc->InitializeFrameLoader(this);
if (NS_FAILED(rv)) {
mPendingSwitchID = 0;
mTriggeringPrincipal = nullptr;
mCsp = nullptr;
FireErrorEvent();
}
}
nsresult nsFrameLoader::ReallyStartLoading() {
nsresult rv = ReallyStartLoadingInternal();
if (NS_FAILED(rv)) {
FireErrorEvent();
}
return rv;
}
nsresult nsFrameLoader::ReallyStartLoadingInternal() {
NS_ENSURE_STATE((mURIToLoad || mPendingSwitchID) && mOwnerContent &&
mOwnerContent->IsInComposedDoc());
AUTO_PROFILER_LABEL("nsFrameLoader::ReallyStartLoadingInternal", OTHER);
RefPtr<nsDocShellLoadState> loadState;
if (!mPendingSwitchID) {
loadState = new nsDocShellLoadState(mURIToLoad);
loadState->SetOriginalFrameSrc(mLoadingOriginalSrc);
loadState->SetShouldCheckForRecursion(mShouldCheckForRecursion);
// The triggering principal could be null if the frame is loaded other
// than the src attribute, for example, the frame is sandboxed. In that
// case we use the principal of the owner content, which is needed to
// prevent XSS attaches on documents loaded in subframes.
if (mTriggeringPrincipal) {
loadState->SetTriggeringPrincipal(mTriggeringPrincipal);
} else {
loadState->SetTriggeringPrincipal(mOwnerContent->NodePrincipal());
}
// If we have an explicit CSP, we set it. If not, we only query it from
// the document in case there was no explicit triggeringPrincipal.
// Otherwise it's possible that the original triggeringPrincipal did not
// have a CSP which causes the CSP on the Principal and explicit CSP
// to be out of sync.
if (mCsp) {
loadState->SetCsp(mCsp);
} else if (!mTriggeringPrincipal) {
nsCOMPtr<nsIContentSecurityPolicy> csp = mOwnerContent->GetCsp();
loadState->SetCsp(csp);
}
nsAutoString srcdoc;
bool isSrcdoc = mOwnerContent->IsHTMLElement(nsGkAtoms::iframe) &&
mOwnerContent->GetAttr(nsGkAtoms::srcdoc, srcdoc);
if (isSrcdoc) {
loadState->SetSrcdocData(srcdoc);
loadState->SetBaseURI(mOwnerContent->GetBaseURI());
}
auto referrerInfo = MakeRefPtr<ReferrerInfo>(
*mOwnerContent, GetLazyLoadFrameResumptionState().mReferrerPolicy);
loadState->SetReferrerInfo(referrerInfo);
loadState->SetIsFromProcessingFrameAttributes();
// Default flags:
int32_t flags = nsIWebNavigation::LOAD_FLAGS_NONE;
loadState->SetLoadFlags(flags);
loadState->SetFirstParty(false);
Document* ownerDoc = mOwnerContent->OwnerDoc();
if (ownerDoc) {
loadState->SetTriggeringStorageAccess(ownerDoc->UsingStorageAccess());
loadState->SetTriggeringWindowId(ownerDoc->InnerWindowID());
}
// If we're loading the default about:blank document in a <browser> element,
// prevent the load from causing a process switch by explicitly overriding
// remote type selection.
if (mPendingBrowsingContext->IsTopContent() &&
mOwnerContent->IsXULElement(nsGkAtoms::browser) &&
NS_IsAboutBlank(mURIToLoad) &&
loadState->TriggeringPrincipal()->IsSystemPrincipal()) {
loadState->SetRemoteTypeOverride(mRemoteType);
}
}
if (IsRemoteFrame()) {
if (!EnsureRemoteBrowser()) {
NS_WARNING("Couldn't create child process for iframe.");
return NS_ERROR_FAILURE;
}
if (mPendingSwitchID) {
mRemoteBrowser->ResumeLoad(mPendingSwitchID);
mPendingSwitchID = 0;
} else {
mRemoteBrowser->LoadURL(loadState);
}
if (!mRemoteBrowserShown) {
// This can fail if it's too early to show the frame, we will retry later.
Unused << ShowRemoteFrame(
/* aFrame = */ do_QueryFrame(GetPrimaryFrameOfOwningContent()));
}
return NS_OK;
}
nsresult rv = MaybeCreateDocShell();
if (NS_FAILED(rv)) {
return rv;
}
MOZ_ASSERT(GetDocShell(),
"MaybeCreateDocShell succeeded with a null docShell");
// If we have a pending switch, just resume our load.
if (mPendingSwitchID) {
bool tmpState = mNeedsAsyncDestroy;
mNeedsAsyncDestroy = true;
rv = GetDocShell()->ResumeRedirectedLoad(mPendingSwitchID, -1);
mNeedsAsyncDestroy = tmpState;
mPendingSwitchID = 0;
return rv;
}
// Just to be safe, recheck uri.
rv = CheckURILoad(mURIToLoad, mTriggeringPrincipal);
NS_ENSURE_SUCCESS(rv, rv);
mLoadingOriginalSrc = false;
mShouldCheckForRecursion = false;
// Kick off the load...
bool tmpState = mNeedsAsyncDestroy;
mNeedsAsyncDestroy = true;
RefPtr<nsDocShell> docShell = GetDocShell();
rv = docShell->LoadURI(loadState, false);
mNeedsAsyncDestroy = tmpState;
mURIToLoad = nullptr;
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult nsFrameLoader::CheckURILoad(nsIURI* aURI,
nsIPrincipal* aTriggeringPrincipal) {
// Check for security. The fun part is trying to figure out what principals
// to use. The way I figure it, if we're doing a LoadFrame() accidentally
// (eg someone created a frame/iframe node, we're being parsed, XUL iframes
// are being reframed, etc.) then we definitely want to use the node
// principal of mOwnerContent for security checks. If, on the other hand,
// someone's setting the src on our owner content, or created it via script,
// or whatever, then they can clearly access it... and we should still use
// the principal of mOwnerContent. I don't think that leads to privilege
// escalation, and it's reasonably guaranteed to not lead to XSS issues
// (since caller can already access mOwnerContent in this case). So just use
// the principal of mOwnerContent no matter what. If script wants to run
// things with its own permissions, which differ from those of mOwnerContent
// (which means the script is privileged in some way) it should set
// window.location instead.
nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
// Get our principal
nsIPrincipal* principal =
(aTriggeringPrincipal ? aTriggeringPrincipal
: mOwnerContent->NodePrincipal());
// Check if we are allowed to load absURL
nsresult rv = secMan->CheckLoadURIWithPrincipal(
principal, aURI, nsIScriptSecurityManager::STANDARD,
mOwnerContent->OwnerDoc()->InnerWindowID());
if (NS_FAILED(rv)) {
return rv; // We're not
}
// Bail out if this is an infinite recursion scenario
if (IsRemoteFrame()) {
return NS_OK;
}
return CheckForRecursiveLoad(aURI);
}
nsDocShell* nsFrameLoader::GetDocShell(ErrorResult& aRv) {
if (IsRemoteFrame()) {
return nullptr;
}
// If we have an owner, make sure we have a docshell and return
// that. If not, we're most likely in the middle of being torn down,
// then we just return null.
if (mOwnerContent) {
nsresult rv = MaybeCreateDocShell();
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return nullptr;
}
MOZ_ASSERT(GetDocShell(),
"MaybeCreateDocShell succeeded, but null docShell");
}
return GetDocShell();
}
static void SetTreeOwnerAndChromeEventHandlerOnDocshellTree(
nsIDocShellTreeItem* aItem, nsIDocShellTreeOwner* aOwner,
EventTarget* aHandler) {
MOZ_ASSERT(aItem, "Must have item");
aItem->SetTreeOwner(aOwner);
int32_t childCount = 0;
aItem->GetInProcessChildCount(&childCount);
for (int32_t i = 0; i < childCount; ++i) {
nsCOMPtr<nsIDocShellTreeItem> item;
aItem->GetInProcessChildAt(i, getter_AddRefs(item));
if (aHandler) {
nsCOMPtr<nsIDocShell> shell(do_QueryInterface(item));
shell->SetChromeEventHandler(aHandler);
}
SetTreeOwnerAndChromeEventHandlerOnDocshellTree(item, aOwner, aHandler);
}
}
#if defined(MOZ_DIAGNOSTIC_ASSERT_ENABLED)
static bool CheckDocShellType(mozilla::dom::Element* aOwnerContent,
nsIDocShellTreeItem* aDocShell, nsAtom* aAtom) {
bool isContent = aOwnerContent->AttrValueIs(kNameSpaceID_None, aAtom,
nsGkAtoms::content, eIgnoreCase);
if (isContent) {
return aDocShell->ItemType() == nsIDocShellTreeItem::typeContent;
}
nsCOMPtr<nsIDocShellTreeItem> parent;
aDocShell->GetInProcessParent(getter_AddRefs(parent));
return parent && parent->ItemType() == aDocShell->ItemType();
}
#endif // defined(MOZ_DIAGNOSTIC_ASSERT_ENABLED)
/**
* Hook up a given TreeItem to its tree owner. aItem's type must have already
* been set, and it should already be part of the DocShellTree.
* @param aItem the treeitem we're working with
* @param aTreeOwner the relevant treeowner; might be null
*/
void nsFrameLoader::AddTreeItemToTreeOwner(nsIDocShellTreeItem* aItem,
nsIDocShellTreeOwner* aOwner) {
MOZ_ASSERT(aItem, "Must have docshell treeitem");
MOZ_ASSERT(mOwnerContent, "Must have owning content");
MOZ_DIAGNOSTIC_ASSERT(
CheckDocShellType(mOwnerContent, aItem, TypeAttrName(mOwnerContent)),
"Correct ItemType should be set when creating BrowsingContext");
if (mIsTopLevelContent) {
bool is_primary = mOwnerContent->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::primary, nsGkAtoms::_true, eIgnoreCase);
if (aOwner) {
mOwnerContent->AddMutationObserver(this);
mObservingOwnerContent = true;
aOwner->ContentShellAdded(aItem, is_primary);
}
}
}
static bool AllDescendantsOfType(BrowsingContext* aParent,
BrowsingContext::Type aType) {
for (auto& child : aParent->Children()) {
if (child->GetType() != aType || !AllDescendantsOfType(child, aType)) {
return false;
}
}
return true;
}
void nsFrameLoader::MaybeShowFrame() {
nsIFrame* frame = GetPrimaryFrameOfOwningContent();
if (frame) {
nsSubDocumentFrame* subDocFrame = do_QueryFrame(frame);
if (subDocFrame) {
subDocFrame->MaybeShowViewer();
}
}
}
static ScrollbarPreference GetScrollbarPreference(const Element* aOwner) {
if (!aOwner) {
return ScrollbarPreference::Auto;
}
const nsAttrValue* attrValue = aOwner->GetParsedAttr(nsGkAtoms::scrolling);
return nsGenericHTMLFrameElement::MapScrollingAttribute(attrValue);
}
static CSSIntSize GetMarginAttributes(const Element* aOwner) {
CSSIntSize result(-1, -1);
auto* content = nsGenericHTMLElement::FromNodeOrNull(aOwner);
if (!content) {
return result;
}
const nsAttrValue* attr = content->GetParsedAttr(nsGkAtoms::marginwidth);
if (attr && attr->Type() == nsAttrValue::eInteger) {
result.width = attr->GetIntegerValue();
}
attr = content->GetParsedAttr(nsGkAtoms::marginheight);
if (attr && attr->Type() == nsAttrValue::eInteger) {
result.height = attr->GetIntegerValue();
}
return result;
}
bool nsFrameLoader::Show(nsSubDocumentFrame* aFrame) {
if (mInShow) {
return false;
}
mInShow = true;
auto resetInShow = mozilla::MakeScopeExit([&] { mInShow = false; });
if (IsRemoteFrame()) {
return ShowRemoteFrame(aFrame);
}
const LayoutDeviceIntSize size = aFrame->GetInitialSubdocumentSize();
nsresult rv = MaybeCreateDocShell();
if (NS_FAILED(rv)) {
return false;
}
nsDocShell* ds = GetDocShell();
MOZ_ASSERT(ds, "MaybeCreateDocShell succeeded, but null docShell");
if (!ds) {
return false;
}
ds->SetScrollbarPreference(GetScrollbarPreference(mOwnerContent));
const bool marginsChanged =
ds->UpdateFrameMargins(GetMarginAttributes(mOwnerContent));
nsView* view = aFrame->EnsureInnerView();
if (!view) {
return false;
}
// If we already have a pres shell (which can happen with <object> / <embed>)
// then hook it up in the view tree.
if (PresShell* presShell = ds->GetPresShell()) {
// Ensure root scroll frame is reflowed in case margins have changed.
if (marginsChanged) {
if (nsIFrame* rootScrollContainerFrame =
presShell->GetRootScrollContainerFrame()) {
presShell->FrameNeedsReflow(rootScrollContainerFrame,
IntrinsicDirty::None, NS_FRAME_IS_DIRTY);
}
}
nsView* childView = presShell->GetViewManager()->GetRootView();
MOZ_DIAGNOSTIC_ASSERT(childView);
if (childView->GetParent() == view) {
// We were probably doing a docshell swap and succeeded before getting
// here, hooray, nothing else to do.
return true;
}
// We did layout before due to <object> or <embed> and now we need to fix
// up our stuff and initialize our docshell below too.
MOZ_DIAGNOSTIC_ASSERT(!view->GetFirstChild());
MOZ_DIAGNOSTIC_ASSERT(!childView->GetParent(), "Stale view?");
nsSubDocumentFrame::InsertViewsInReverseOrder(childView, view);
nsSubDocumentFrame::EndSwapDocShellsForViews(view->GetFirstChild());
}
RefPtr<nsDocShell> baseWindow = GetDocShell();
baseWindow->InitWindow(view->GetWidget(), 0, 0, size.width, size.height);
baseWindow->SetVisibility(true);
NS_ENSURE_TRUE(GetDocShell(), false);
// Trigger editor re-initialization if midas is turned on in the sub-document.
// This shouldn't be necessary, but given the way our editor works, it is.
//
//
// FIXME(emilio): This is a massive hack, plus probably not the right place to
// do it. Should probably be done in Document::CreatePresShell?
if (RefPtr<PresShell> presShell = GetDocShell()->GetPresShell()) {
Document* doc = presShell->GetDocument();
nsHTMLDocument* htmlDoc =
doc && doc->IsHTMLOrXHTML() ? doc->AsHTMLDocument() : nullptr;
if (htmlDoc) {
nsAutoString designMode;
htmlDoc->GetDesignMode(designMode);
if (designMode.EqualsLiteral("on")) {
// Hold on to the editor object to let the document reattach to the
// same editor object, instead of creating a new one.
RefPtr<HTMLEditor> htmlEditor = GetDocShell()->GetHTMLEditor();
Unused << htmlEditor;
htmlDoc->SetDesignMode(u"off"_ns, Nothing(), IgnoreErrors());
htmlDoc->SetDesignMode(u"on"_ns, Nothing(), IgnoreErrors());
} else {
// Re-initialize the presentation for contenteditable documents
bool editable = false, hasEditingSession = false;
GetDocShell()->GetEditable(&editable);
GetDocShell()->GetHasEditingSession(&hasEditingSession);
RefPtr<HTMLEditor> htmlEditor = GetDocShell()->GetHTMLEditor();
if (editable && hasEditingSession && htmlEditor) {
htmlEditor->PostCreate();
}
}
}
}
mInShow = false;
if (mHideCalled) {
mHideCalled = false;
Hide();
return false;
}
return true;
}
void nsFrameLoader::MarginsChanged() {
// We assume that the margins are always zero for remote frames.
if (IsRemoteFrame()) {
return;
}
nsDocShell* docShell = GetDocShell();
// If there's no docshell, we're probably not up and running yet.
// nsFrameLoader::Show() will take care of setting the right
// margins.
if (!docShell) {
return;
}
if (!docShell->UpdateFrameMargins(GetMarginAttributes(mOwnerContent))) {
return;
}
// There's a cached property declaration block
// that needs to be updated
if (Document* doc = docShell->GetDocument()) {
for (nsINode* cur = doc; cur; cur = cur->GetNextNode()) {
if (auto* body = HTMLBodyElement::FromNode(cur)) {
body->FrameMarginsChanged();
}
}
}
}
bool nsFrameLoader::ShowRemoteFrame(nsSubDocumentFrame* aFrame) {
AUTO_PROFILER_LABEL("nsFrameLoader::ShowRemoteFrame", OTHER);
NS_ASSERTION(IsRemoteFrame(),
"ShowRemote only makes sense on remote frames.");
if (!EnsureRemoteBrowser()) {
NS_ERROR("Couldn't create child process.");
return false;
}
const bool hasSize =
aFrame && !aFrame->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);
// cross-process layers; need to figure out what behavior we really
// want here. For now, hack.
if (!mRemoteBrowserShown) {
if (!mOwnerContent || !mOwnerContent->GetComposedDoc()) {
return false;
}
// We never want to host remote frameloaders in simple popups, like menus.
nsIWidget* widget = nsContentUtils::WidgetForContent(mOwnerContent);
if (!widget || static_cast<nsBaseWidget*>(widget)->IsSmallPopup()) {
return false;
}
if (BrowserHost* bh = mRemoteBrowser->AsBrowserHost()) {
RefPtr<BrowsingContext> bc = bh->GetBrowsingContext()->Top();
// Set to the current activation of the window.
bc->SetIsActiveBrowserWindow(bc->GetIsActiveBrowserWindow());
}
nsCOMPtr<nsISupports> container = mOwnerContent->OwnerDoc()->GetContainer();
nsCOMPtr<nsIBaseWindow> baseWindow = do_QueryInterface(container);
nsCOMPtr<nsIWidget> mainWidget;
baseWindow->GetMainWidget(getter_AddRefs(mainWidget));
nsSizeMode sizeMode =
mainWidget ? mainWidget->SizeMode() : nsSizeMode_Normal;
const auto size =
hasSize ? aFrame->GetSubdocumentSize() : LayoutDeviceIntSize();
OwnerShowInfo info(size, GetScrollbarPreference(mOwnerContent), sizeMode);
if (!mRemoteBrowser->Show(info)) {
return false;
}
mRemoteBrowserShown = true;
mRemoteBrowserSized = hasSize;
// This notification doesn't apply to fission, apparently.
if (!GetBrowserBridgeChild()) {
if (nsCOMPtr<nsIObserverService> os = services::GetObserverService()) {
os->NotifyObservers(ToSupports(this), "remote-browser-shown", nullptr);
}
}
} else if (hasSize) {
NS_ENSURE_SUCCESS(UpdatePositionAndSize(aFrame), false);
}
return true;
}
void nsFrameLoader::Hide() {
if (mHideCalled) {
return;
}
if (mInShow) {
mHideCalled = true;
return;
}
if (mRemoteBrowser) {
mRemoteBrowser->UpdateEffects(EffectsInfo::FullyHidden());
}
if (!GetDocShell()) {
return;
}
nsCOMPtr<nsIDocumentViewer> viewer;
GetDocShell()->GetDocViewer(getter_AddRefs(viewer));
if (viewer) viewer->SetSticky(false);
RefPtr<nsDocShell> baseWin = GetDocShell();
baseWin->SetVisibility(false);
baseWin->SetParentWidget(nullptr);
}
void nsFrameLoader::ForceLayoutIfNecessary() {
nsIFrame* frame = GetPrimaryFrameOfOwningContent();
if (!frame) {
return;
}
nsPresContext* presContext = frame->PresContext();
if (!presContext) {
return;
}
// Only force the layout flush if the frameloader hasn't ever been
// run through layout.
if (frame->HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
if (RefPtr<PresShell> presShell = presContext->GetPresShell()) {
presShell->FlushPendingNotifications(FlushType::Layout);
}
}
}
nsresult nsFrameLoader::SwapWithOtherRemoteLoader(
nsFrameLoader* aOther, nsFrameLoaderOwner* aThisOwner,
nsFrameLoaderOwner* aOtherOwner) {
MOZ_ASSERT(NS_IsMainThread());
#ifdef DEBUG
RefPtr<nsFrameLoader> first = aThisOwner->GetFrameLoader();
RefPtr<nsFrameLoader> second = aOtherOwner->GetFrameLoader();
MOZ_ASSERT(first == this, "aThisOwner must own this");
MOZ_ASSERT(second == aOther, "aOtherOwner must own aOther");
#endif
Element* ourContent = mOwnerContent;
Element* otherContent = aOther->mOwnerContent;
if (!ourContent || !otherContent) {
// Can't handle this
return NS_ERROR_NOT_IMPLEMENTED;
}
// Make sure there are no same-origin issues
bool equal;
nsresult rv = ourContent->NodePrincipal()->Equals(
otherContent->NodePrincipal(), &equal);
if (NS_FAILED(rv) || !equal) {
// Security problems loom. Just bail on it all
return NS_ERROR_DOM_SECURITY_ERR;
}
Document* ourDoc = ourContent->GetComposedDoc();
Document* otherDoc = otherContent->GetComposedDoc();
if (!ourDoc || !otherDoc) {
// Again, how odd, given that we had docshells
return NS_ERROR_NOT_IMPLEMENTED;
}
PresShell* ourPresShell = ourDoc->GetPresShell();
PresShell* otherPresShell = otherDoc->GetPresShell();
if (!ourPresShell || !otherPresShell) {
return NS_ERROR_NOT_IMPLEMENTED;
}
auto* browserParent = GetBrowserParent();
auto* otherBrowserParent = aOther->GetBrowserParent();
if (!browserParent || !otherBrowserParent) {
return NS_ERROR_NOT_IMPLEMENTED;
}
RefPtr<BrowsingContext> ourBc = browserParent->GetBrowsingContext();
RefPtr<BrowsingContext> otherBc = otherBrowserParent->GetBrowsingContext();
// When we swap docShells, maybe we have to deal with a new page created just
// for this operation. In this case, the browser code should already have set
// the correct userContextId attribute value in the owning element, but our
// docShell, that has been created way before) doesn't know that that
// happened.
// This is the reason why now we must retrieve the correct value from the
// usercontextid attribute before comparing our originAttributes with the
// other one.
OriginAttributes ourOriginAttributes = ourBc->OriginAttributesRef();
rv = PopulateOriginContextIdsFromAttributes(ourOriginAttributes);
NS_ENSURE_SUCCESS(rv, rv);
OriginAttributes otherOriginAttributes = otherBc->OriginAttributesRef();
rv = aOther->PopulateOriginContextIdsFromAttributes(otherOriginAttributes);
NS_ENSURE_SUCCESS(rv, rv);
if (!ourOriginAttributes.EqualsIgnoringFPD(otherOriginAttributes)) {
return NS_ERROR_NOT_IMPLEMENTED;
}
bool ourHasHistory = mIsTopLevelContent &&
ourContent->IsXULElement(nsGkAtoms::browser) &&
!ourContent->HasAttr(nsGkAtoms::disablehistory);
bool otherHasHistory = aOther->mIsTopLevelContent &&
otherContent->IsXULElement(nsGkAtoms::browser) &&
!otherContent->HasAttr(nsGkAtoms::disablehistory);
if (ourHasHistory != otherHasHistory) {
return NS_ERROR_NOT_IMPLEMENTED;
}
if (mInSwap || aOther->mInSwap) {
return NS_ERROR_NOT_IMPLEMENTED;
}
mInSwap = aOther->mInSwap = true;
// NOTE(emilio): This doesn't have to flush because the caller does already.
nsIFrame* ourFrame = ourContent->GetPrimaryFrame();
nsIFrame* otherFrame = otherContent->GetPrimaryFrame();
if (!ourFrame || !otherFrame) {
mInSwap = aOther->mInSwap = false;
return NS_ERROR_NOT_IMPLEMENTED;
}
nsSubDocumentFrame* ourFrameFrame = do_QueryFrame(ourFrame);
if (!ourFrameFrame) {
mInSwap = aOther->mInSwap = false;
return NS_ERROR_NOT_IMPLEMENTED;
}
rv = ourFrameFrame->BeginSwapDocShells(otherFrame);
if (NS_FAILED(rv)) {
mInSwap = aOther->mInSwap = false;
return rv;
}
nsCOMPtr<nsIBrowserDOMWindow> otherBrowserDOMWindow =
otherBrowserParent->GetBrowserDOMWindow();
nsCOMPtr<nsIBrowserDOMWindow> browserDOMWindow =
browserParent->GetBrowserDOMWindow();
if (!!otherBrowserDOMWindow != !!browserDOMWindow) {
return NS_ERROR_NOT_IMPLEMENTED;
}
otherBrowserParent->SetBrowserDOMWindow(browserDOMWindow);
browserParent->SetBrowserDOMWindow(otherBrowserDOMWindow);
MaybeUpdatePrimaryBrowserParent(eBrowserParentRemoved);
aOther->MaybeUpdatePrimaryBrowserParent(eBrowserParentRemoved);
if (mozilla::BFCacheInParent() && XRE_IsParentProcess()) {
// nsFrameLoaders in session history can't be moved to another owner since
// there are no corresponging message managers on which swap can be done.
// See the line mMessageManager.swap(aOther->mMessageManager); below.
auto evict = [](nsFrameLoader* aFrameLoader) {
if (BrowsingContext* bc =
aFrameLoader->GetMaybePendingBrowsingContext()) {
nsCOMPtr<nsISHistory> shistory = bc->Canonical()->GetSessionHistory();
if (shistory) {
shistory->EvictAllDocumentViewers();
}
}
};
evict(this);
evict(aOther);
}
SetOwnerContent(otherContent);
aOther->SetOwnerContent(ourContent);
browserParent->SetOwnerElement(otherContent);
otherBrowserParent->SetOwnerElement(ourContent);
// Update window activation state for the swapped owner content.
bool ourActive = otherBc->GetIsActiveBrowserWindow();
bool otherActive = ourBc->GetIsActiveBrowserWindow();
if (ourBc->IsTop()) {
ourBc->SetIsActiveBrowserWindow(otherActive);
}
if (otherBc->IsTop()) {
otherBc->SetIsActiveBrowserWindow(ourActive);
}
MaybeUpdatePrimaryBrowserParent(eBrowserParentChanged);
aOther->MaybeUpdatePrimaryBrowserParent(eBrowserParentChanged);
RefPtr<nsFrameMessageManager> ourMessageManager = mMessageManager;
RefPtr<nsFrameMessageManager> otherMessageManager = aOther->mMessageManager;
// Swap and setup things in parent message managers.
if (ourMessageManager) {
ourMessageManager->SetCallback(aOther);
}
if (otherMessageManager) {
otherMessageManager->SetCallback(this);
}
mMessageManager.swap(aOther->mMessageManager);
// XXXsmaug what should be done to JSWindowActorParent objects when swapping
// Perform the actual swap of the internal refptrs. We keep a strong reference
// to ourselves to make sure we don't die while we overwrite our reference to
// ourself.
RefPtr<nsFrameLoader> kungFuDeathGrip(this);
aThisOwner->SetFrameLoader(aOther);
aOtherOwner->SetFrameLoader(kungFuDeathGrip);
ourFrameFrame->EndSwapDocShells(otherFrame);
ourPresShell->BackingScaleFactorChanged();
otherPresShell->BackingScaleFactorChanged();
mInSwap = aOther->mInSwap = false;
// Send an updated tab context since owner content type may have changed.
MutableTabContext ourContext;
rv = GetNewTabContext(&ourContext);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
MutableTabContext otherContext;
rv = aOther->GetNewTabContext(&otherContext);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
Unused << browserParent->SendSwappedWithOtherRemoteLoader(
ourContext.AsIPCTabContext());
Unused << otherBrowserParent->SendSwappedWithOtherRemoteLoader(
otherContext.AsIPCTabContext());
// These might have moved to a new window, so make sure they have
browserParent->RecomputeProcessPriority();
otherBrowserParent->RecomputeProcessPriority();
return NS_OK;
}
class MOZ_RAII AutoResetInFrameSwap final {
public:
AutoResetInFrameSwap(nsFrameLoader* aThisFrameLoader,
nsFrameLoader* aOtherFrameLoader,
nsDocShell* aThisDocShell, nsDocShell* aOtherDocShell,
EventTarget* aThisEventTarget,
EventTarget* aOtherEventTarget)
: mThisFrameLoader(aThisFrameLoader),
mOtherFrameLoader(aOtherFrameLoader),
mThisDocShell(aThisDocShell),
mOtherDocShell(aOtherDocShell),
mThisEventTarget(aThisEventTarget),
mOtherEventTarget(aOtherEventTarget) {
mThisFrameLoader->mInSwap = true;
mOtherFrameLoader->mInSwap = true;
mThisDocShell->SetInFrameSwap(true);
mOtherDocShell->SetInFrameSwap(true);
// Fire pageshow events on still-loading pages, and then fire pagehide
// events. Note that we do NOT fire these in the normal way, but just fire
// them on the chrome event handlers.
nsContentUtils::FirePageShowEventForFrameLoaderSwap(
mThisDocShell, mThisEventTarget, false);
nsContentUtils::FirePageShowEventForFrameLoaderSwap(
mOtherDocShell, mOtherEventTarget, false);
nsContentUtils::FirePageHideEventForFrameLoaderSwap(mThisDocShell,
mThisEventTarget);
nsContentUtils::FirePageHideEventForFrameLoaderSwap(mOtherDocShell,
mOtherEventTarget);
}
~AutoResetInFrameSwap() {
nsContentUtils::FirePageShowEventForFrameLoaderSwap(mThisDocShell,
mThisEventTarget, true);
nsContentUtils::FirePageShowEventForFrameLoaderSwap(
mOtherDocShell, mOtherEventTarget, true);
mThisFrameLoader->mInSwap = false;
mOtherFrameLoader->mInSwap = false;
mThisDocShell->SetInFrameSwap(false);
mOtherDocShell->SetInFrameSwap(false);
// This is needed to get visibility state right in cases when we swapped a
// visible tab (foreground in visible window) with a non-visible tab.
if (RefPtr<Document> doc = mThisDocShell->GetDocument()) {
doc->UpdateVisibilityState();
}
if (RefPtr<Document> doc = mOtherDocShell->GetDocument()) {
doc->UpdateVisibilityState();
}
}
private:
RefPtr<nsFrameLoader> mThisFrameLoader;
RefPtr<nsFrameLoader> mOtherFrameLoader;
RefPtr<nsDocShell> mThisDocShell;
RefPtr<nsDocShell> mOtherDocShell;
nsCOMPtr<EventTarget> mThisEventTarget;
nsCOMPtr<EventTarget> mOtherEventTarget;
};
nsresult nsFrameLoader::SwapWithOtherLoader(nsFrameLoader* aOther,
nsFrameLoaderOwner* aThisOwner,
nsFrameLoaderOwner* aOtherOwner) {
#ifdef DEBUG
RefPtr<nsFrameLoader> first = aThisOwner->GetFrameLoader();
RefPtr<nsFrameLoader> second = aOtherOwner->GetFrameLoader();
MOZ_ASSERT(first == this, "aThisOwner must own this");
MOZ_ASSERT(second == aOther, "aOtherOwner must own aOther");
#endif
NS_ENSURE_STATE(!mInShow && !aOther->mInShow);
if (IsRemoteFrame() != aOther->IsRemoteFrame()) {
NS_WARNING(
"Swapping remote and non-remote frames is not currently supported");
return NS_ERROR_NOT_IMPLEMENTED;
}
RefPtr<Element> ourContent = mOwnerContent;
RefPtr<Element> otherContent = aOther->mOwnerContent;
if (!ourContent || !otherContent) {
// Can't handle this
return NS_ERROR_NOT_IMPLEMENTED;
}
nsIFrame* ourFrame = ourContent->GetPrimaryFrame(FlushType::Frames);
nsIFrame* otherFrame = otherContent->GetPrimaryFrame(FlushType::Frames);
if (!ourFrame || !otherFrame) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// Ensure the flushes above haven't changed all the world.
if (ourContent != mOwnerContent || otherContent != aOther->mOwnerContent) {
return NS_ERROR_NOT_IMPLEMENTED;
}
bool ourHasSrcdoc = ourContent->IsHTMLElement(nsGkAtoms::iframe) &&
ourContent->HasAttr(nsGkAtoms::srcdoc);
bool otherHasSrcdoc = otherContent->IsHTMLElement(nsGkAtoms::iframe) &&
otherContent->HasAttr(nsGkAtoms::srcdoc);
if (ourHasSrcdoc || otherHasSrcdoc) {
// Ignore this case entirely for now, since we support XUL <-> HTML swapping
return NS_ERROR_NOT_IMPLEMENTED;
}
bool ourFullscreenAllowed = ourContent->IsXULElement();
bool otherFullscreenAllowed = otherContent->IsXULElement();
if (ourFullscreenAllowed != otherFullscreenAllowed) {
return NS_ERROR_NOT_IMPLEMENTED;
}
nsILoadContext* ourLoadContext = ourContent->OwnerDoc()->GetLoadContext();
nsILoadContext* otherLoadContext = otherContent->OwnerDoc()->GetLoadContext();
MOZ_ASSERT(ourLoadContext && otherLoadContext,
"Swapping frames within dead documents?");
if (ourLoadContext->UseRemoteTabs() != otherLoadContext->UseRemoteTabs()) {
NS_WARNING("Can't swap between e10s and non-e10s windows");
return NS_ERROR_NOT_IMPLEMENTED;
}
if (ourLoadContext->UseRemoteSubframes() !=
otherLoadContext->UseRemoteSubframes()) {
NS_WARNING("Can't swap between fission and non-fission windows");
return NS_ERROR_NOT_IMPLEMENTED;
}
// Divert to a separate path for the remaining steps in the remote case
if (IsRemoteFrame()) {
MOZ_ASSERT(aOther->IsRemoteFrame());
return SwapWithOtherRemoteLoader(aOther, aThisOwner, aOtherOwner);
}
// Make sure there are no same-origin issues
bool equal;
nsresult rv = ourContent->NodePrincipal()->Equals(
otherContent->NodePrincipal(), &equal);
if (NS_FAILED(rv) || !equal) {
// Security problems loom. Just bail on it all
return NS_ERROR_DOM_SECURITY_ERR;
}
RefPtr<nsDocShell> ourDocshell = GetExistingDocShell();
RefPtr<nsDocShell> otherDocshell = aOther->GetExistingDocShell();
if (!ourDocshell || !otherDocshell) {
// How odd
return NS_ERROR_NOT_IMPLEMENTED;
}
// To avoid having to mess with session history, avoid swapping
// frameloaders that don't correspond to root same-type docshells,
// unless both roots have session history disabled.
nsCOMPtr<nsIDocShellTreeItem> ourRootTreeItem, otherRootTreeItem;
ourDocshell->GetInProcessSameTypeRootTreeItem(
getter_AddRefs(ourRootTreeItem));
otherDocshell->GetInProcessSameTypeRootTreeItem(
getter_AddRefs(otherRootTreeItem));
nsCOMPtr<nsIWebNavigation> ourRootWebnav = do_QueryInterface(ourRootTreeItem);
nsCOMPtr<nsIWebNavigation> otherRootWebnav =
do_QueryInterface(otherRootTreeItem);
if (!ourRootWebnav || !otherRootWebnav) {
return NS_ERROR_NOT_IMPLEMENTED;
}
RefPtr<ChildSHistory> ourHistory = ourRootWebnav->GetSessionHistory();
RefPtr<ChildSHistory> otherHistory = otherRootWebnav->GetSessionHistory();
if ((ourRootTreeItem != ourDocshell || otherRootTreeItem != otherDocshell) &&
(ourHistory || otherHistory)) {
return NS_ERROR_NOT_IMPLEMENTED;
}
RefPtr<BrowsingContext> ourBc = ourDocshell->GetBrowsingContext();
RefPtr<BrowsingContext> otherBc = otherDocshell->GetBrowsingContext();
// Also make sure that the two BrowsingContexts are the same type. Otherwise
// swapping is certainly not safe. If this needs to be changed then
// the code below needs to be audited as it assumes identical types.
if (ourBc->GetType() != otherBc->GetType()) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// We ensure that BCs are either both top frames or both subframes.
if (ourBc->IsTop() != otherBc->IsTop()) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// One more twist here. Setting up the right treeowners in a heterogeneous
// tree is a bit of a pain. So make sure that if `ourBc->GetType()` is not
// nsIDocShellTreeItem::typeContent then all of our descendants are the same
// type as us.
if (!ourBc->IsContent() &&
(!AllDescendantsOfType(ourBc, ourBc->GetType()) ||
!AllDescendantsOfType(otherBc, otherBc->GetType()))) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// Save off the tree owners, frame elements, chrome event handlers, and
// docshell and document parents before doing anything else.
nsCOMPtr<nsIDocShellTreeOwner> ourOwner, otherOwner;
ourDocshell->GetTreeOwner(getter_AddRefs(ourOwner));
otherDocshell->GetTreeOwner(getter_AddRefs(otherOwner));
// Note: it's OK to have null treeowners.
nsCOMPtr<nsIDocShellTreeItem> ourParentItem, otherParentItem;
ourDocshell->GetInProcessParent(getter_AddRefs(ourParentItem));
otherDocshell->GetInProcessParent(getter_AddRefs(otherParentItem));
if (!ourParentItem || !otherParentItem) {
return NS_ERROR_NOT_IMPLEMENTED;
}
nsCOMPtr<nsPIDOMWindowOuter> ourWindow = ourDocshell->GetWindow();
nsCOMPtr<nsPIDOMWindowOuter> otherWindow = otherDocshell->GetWindow();
nsCOMPtr<Element> ourFrameElement = ourWindow->GetFrameElementInternal();
nsCOMPtr<Element> otherFrameElement = otherWindow->GetFrameElementInternal();
nsCOMPtr<EventTarget> ourChromeEventHandler =
ourWindow->GetChromeEventHandler();
nsCOMPtr<EventTarget> otherChromeEventHandler =
otherWindow->GetChromeEventHandler();
nsCOMPtr<EventTarget> ourEventTarget = ourWindow->GetParentTarget();
nsCOMPtr<EventTarget> otherEventTarget = otherWindow->GetParentTarget();
NS_ASSERTION(SameCOMIdentity(ourFrameElement, ourContent) &&
SameCOMIdentity(otherFrameElement, otherContent) &&
SameCOMIdentity(ourChromeEventHandler, ourContent) &&
SameCOMIdentity(otherChromeEventHandler, otherContent),
"How did that happen, exactly?");
nsCOMPtr<Document> ourChildDocument = ourWindow->GetExtantDoc();
nsCOMPtr<Document> otherChildDocument = otherWindow->GetExtantDoc();
if (!ourChildDocument || !otherChildDocument) {
// This shouldn't be happening
return NS_ERROR_NOT_IMPLEMENTED;
}
nsCOMPtr<Document> ourParentDocument =
ourChildDocument->GetInProcessParentDocument();
nsCOMPtr<Document> otherParentDocument =
otherChildDocument->GetInProcessParentDocument();
// Make sure to swap docshells between the two frames.
Document* ourDoc = ourContent->GetComposedDoc();
Document* otherDoc = otherContent->GetComposedDoc();
if (!ourDoc || !otherDoc) {
// Again, how odd, given that we had docshells
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_ASSERTION(ourDoc == ourParentDocument, "Unexpected parent document");
NS_ASSERTION(otherDoc == otherParentDocument, "Unexpected parent document");
PresShell* ourPresShell = ourDoc->GetPresShell();
PresShell* otherPresShell = otherDoc->GetPresShell();
if (!ourPresShell || !otherPresShell) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// When we swap docShells, maybe we have to deal with a new page created just
// for this operation. In this case, the browser code should already have set
// the correct userContextId attribute value in the owning element, but our
// docShell, that has been created way before) doesn't know that that
// happened.
// This is the reason why now we must retrieve the correct value from the
// usercontextid attribute before comparing our originAttributes with the
// other one.
OriginAttributes ourOriginAttributes = ourDocshell->GetOriginAttributes();
rv = PopulateOriginContextIdsFromAttributes(ourOriginAttributes);
NS_ENSURE_SUCCESS(rv, rv);
OriginAttributes otherOriginAttributes = otherDocshell->GetOriginAttributes();
rv = aOther->PopulateOriginContextIdsFromAttributes(otherOriginAttributes);
NS_ENSURE_SUCCESS(rv, rv);
if (ourOriginAttributes != otherOriginAttributes) {
return NS_ERROR_NOT_IMPLEMENTED;
}
if (mInSwap || aOther->mInSwap) {
return NS_ERROR_NOT_IMPLEMENTED;
}
AutoResetInFrameSwap autoFrameSwap(this, aOther, ourDocshell, otherDocshell,
ourEventTarget, otherEventTarget);
nsSubDocumentFrame* ourFrameFrame = do_QueryFrame(ourFrame);
if (!ourFrameFrame) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// OK. First begin to swap the docshells in the two nsIFrames
rv = ourFrameFrame->BeginSwapDocShells(otherFrame);
if (NS_FAILED(rv)) {
return rv;
}
// Now move the docshells to the right docshell trees. Note that this
// resets their treeowners to null.
ourParentItem->RemoveChild(ourDocshell);
otherParentItem->RemoveChild(otherDocshell);
if (ourBc->IsContent()) {
ourOwner->ContentShellRemoved(ourDocshell);
otherOwner->ContentShellRemoved(otherDocshell);
}
ourParentItem->AddChild(otherDocshell);
otherParentItem->AddChild(ourDocshell);
// Restore the correct chrome event handlers.
ourDocshell->SetChromeEventHandler(otherChromeEventHandler);
otherDocshell->SetChromeEventHandler(ourChromeEventHandler);
// Restore the correct treeowners
// (and also chrome event handlers for content frames only).
SetTreeOwnerAndChromeEventHandlerOnDocshellTree(
ourDocshell, otherOwner,
ourBc->IsContent() ? otherChromeEventHandler.get() : nullptr);
SetTreeOwnerAndChromeEventHandlerOnDocshellTree(
otherDocshell, ourOwner,
ourBc->IsContent() ? ourChromeEventHandler.get() : nullptr);
// Switch the owner content before we start calling AddTreeItemToTreeOwner.
// Note that we rely on this to deal with setting mObservingOwnerContent to
// false and calling RemoveMutationObserver as needed.
SetOwnerContent(otherContent);
aOther->SetOwnerContent(ourContent);
AddTreeItemToTreeOwner(ourDocshell, otherOwner);
aOther->AddTreeItemToTreeOwner(otherDocshell, ourOwner);
// SetSubDocumentFor nulls out parent documents on the old child doc if a
// new non-null document is passed in, so just go ahead and remove both
// kids before reinserting in the parent subdoc maps, to avoid
// complications.
ourParentDocument->SetSubDocumentFor(ourContent, nullptr);
otherParentDocument->SetSubDocumentFor(otherContent, nullptr);
ourParentDocument->SetSubDocumentFor(ourContent, otherChildDocument);
otherParentDocument->SetSubDocumentFor(otherContent, ourChildDocument);
ourWindow->SetFrameElementInternal(otherFrameElement);
otherWindow->SetFrameElementInternal(ourFrameElement);
RefPtr<nsFrameMessageManager> ourMessageManager = mMessageManager;
RefPtr<nsFrameMessageManager> otherMessageManager = aOther->mMessageManager;
// Swap pointers in child message managers.
if (mChildMessageManager) {
InProcessBrowserChildMessageManager* browserChild = mChildMessageManager;
browserChild->SetOwner(otherContent);
browserChild->SetChromeMessageManager(otherMessageManager);
}
if (aOther->mChildMessageManager) {
InProcessBrowserChildMessageManager* otherBrowserChild =
aOther->mChildMessageManager;
otherBrowserChild->SetOwner(ourContent);
otherBrowserChild->SetChromeMessageManager(ourMessageManager);
}
// Swap and setup things in parent message managers.
if (mMessageManager) {
mMessageManager->SetCallback(aOther);
}
if (aOther->mMessageManager) {
aOther->mMessageManager->SetCallback(this);
}
mMessageManager.swap(aOther->mMessageManager);
// Perform the actual swap of the internal refptrs. We keep a strong reference
// to ourselves to make sure we don't die while we overwrite our reference to
// ourself.
RefPtr<nsFrameLoader> kungFuDeathGrip(this);
aThisOwner->SetFrameLoader(aOther);
aOtherOwner->SetFrameLoader(kungFuDeathGrip);
// Drop any cached content viewers in the two session histories.
if (ourHistory) {
ourHistory->EvictLocalDocumentViewers();
}
if (otherHistory) {
otherHistory->EvictLocalDocumentViewers();
}
NS_ASSERTION(ourFrame == ourContent->GetPrimaryFrame() &&
otherFrame == otherContent->GetPrimaryFrame(),
"changed primary frame");
ourFrameFrame->EndSwapDocShells(otherFrame);
// If the content being swapped came from windows on two screens with
// incompatible backing resolution (e.g. dragging a tab between windows on
// hi-dpi and low-dpi screens), it will have style data that is based on
// the wrong appUnitsPerDevPixel value. So we tell the PresShells that their
ourFrame->PresShell()->BackingScaleFactorChanged();
otherFrame->PresShell()->BackingScaleFactorChanged();
return NS_OK;
}
void nsFrameLoader::Destroy(bool aForProcessSwitch) {
StartDestroy(aForProcessSwitch);
}
class nsFrameLoaderDestroyRunnable : public Runnable {
enum DestroyPhase {
// See the implementation of Run for an explanation of these phases.
eDestroyDocShell,
eWaitForUnloadMessage,
eDestroyComplete
};
RefPtr<nsFrameLoader> mFrameLoader;
DestroyPhase mPhase;
public:
explicit nsFrameLoaderDestroyRunnable(nsFrameLoader* aFrameLoader)
: mozilla::Runnable("nsFrameLoaderDestroyRunnable"),
mFrameLoader(aFrameLoader),
mPhase(eDestroyDocShell) {}
NS_IMETHOD Run() override;
};
void nsFrameLoader::StartDestroy(bool aForProcessSwitch) {
// nsFrameLoader::StartDestroy is called just before the frameloader is
// detached from the <browser> element. Destruction continues in phases via
// the nsFrameLoaderDestroyRunnable.
if (mDestroyCalled) {
return;
}
mDestroyCalled = true;
// Request a full tab state flush if the tab is closing.
//
// XXX If we find that we need to do Session Store cleanup for the frameloader
// that's going away, we should unconditionally do the flush here, but include
// the |aForProcessSwitch| flag in the completion notification.
if (!aForProcessSwitch) {
RequestFinalTabStateFlush();
}
// After this point, we return an error when trying to send a message using
// the message manager on the frame.
if (mMessageManager) {
mMessageManager->Close();
}
// Retain references to the <browser> element and the frameloader in case we
// receive any messages from the message manager on the frame. These
// references are dropped in DestroyComplete.
if (mChildMessageManager || mRemoteBrowser) {
mOwnerContentStrong = mOwnerContent;
if (auto* browserParent = GetBrowserParent()) {
browserParent->CacheFrameLoader(this);
}
if (mChildMessageManager) {
mChildMessageManager->CacheFrameLoader(this);
}
}
// If the BrowserParent has installed any event listeners on the window, this
// is its last chance to remove them while we're still in the document.
if (auto* browserParent = GetBrowserParent()) {
browserParent->RemoveWindowListeners();
}
nsCOMPtr<Document> doc;
bool dynamicSubframeRemoval = false;
if (mOwnerContent) {
doc = mOwnerContent->OwnerDoc();
dynamicSubframeRemoval = !aForProcessSwitch &&
mPendingBrowsingContext->IsSubframe() &&
!doc->InUnlinkOrDeletion();
doc->SetSubDocumentFor(mOwnerContent, nullptr);
MaybeUpdatePrimaryBrowserParent(eBrowserParentRemoved);
nsCOMPtr<nsFrameLoaderOwner> owner = do_QueryInterface(mOwnerContent);
owner->FrameLoaderDestroying(this, !aForProcessSwitch);
SetOwnerContent(nullptr);
}
// Seems like this is a dynamic frame removal.
if (dynamicSubframeRemoval) {
BrowsingContext* browsingContext = GetExtantBrowsingContext();
if (browsingContext) {
RefPtr<ChildSHistory> childSHistory =
browsingContext->Top()->GetChildSessionHistory();
if (childSHistory) {
if (mozilla::SessionHistoryInParent()) {
uint32_t addedEntries = 0;
browsingContext->PreOrderWalk([&addedEntries](BrowsingContext* aBC) {
// The initial load doesn't increase history length.
addedEntries += aBC->GetHistoryEntryCount() - 1;
});
nsID changeID = {};
if (addedEntries > 0) {
ChildSHistory* shistory =
browsingContext->Top()->GetChildSessionHistory();
if (shistory) {
changeID = shistory->AddPendingHistoryChange(0, -addedEntries);
}
}
browsingContext->RemoveFromSessionHistory(changeID);
} else {
AutoTArray<nsID, 16> ids({browsingContext->GetHistoryID()});
childSHistory->LegacySHistory()->RemoveEntries(
ids, childSHistory->Index());
}
}
}
}
// Let the tree owner know we're gone.
if (mIsTopLevelContent) {
if (GetDocShell()) {
nsCOMPtr<nsIDocShellTreeItem> parentItem;
GetDocShell()->GetInProcessParent(getter_AddRefs(parentItem));
nsCOMPtr<nsIDocShellTreeOwner> owner = do_GetInterface(parentItem);
if (owner) {
owner->ContentShellRemoved(GetDocShell());
}
}
}
// Let our window know that we are gone
if (GetDocShell()) {
nsCOMPtr<nsPIDOMWindowOuter> win_private(GetDocShell()->GetWindow());
if (win_private) {
win_private->SetFrameElementInternal(nullptr);
}
}
nsCOMPtr<nsIRunnable> destroyRunnable =
new nsFrameLoaderDestroyRunnable(this);
if (mNeedsAsyncDestroy || !doc ||
NS_FAILED(doc->FinalizeFrameLoader(this, destroyRunnable))) {
NS_DispatchToCurrentThread(destroyRunnable);
}
}
nsresult nsFrameLoaderDestroyRunnable::Run() {
switch (mPhase) {
case eDestroyDocShell:
mFrameLoader->DestroyDocShell();
// In the out-of-process case, BrowserParent will eventually call
// DestroyComplete once it receives a __delete__ message from the child.
// In the in-process case, or if the BrowserParent was already destroyed,
// we dispatch a series of runnables to ensure that DestroyComplete gets
// called at the right time. The frame loader is kept alive by
// mFrameLoader during this time.
if (!mFrameLoader->GetRemoteBrowser() ||
!mFrameLoader->GetRemoteBrowser()->CanRecv()) {
// When the docshell is destroyed, NotifyWindowIDDestroyed is called to
// asynchronously notify {outer,inner}-window-destroyed via a runnable.
// We don't want DestroyComplete to run until after those runnables have
// run. Since we're enqueueing ourselves after the window-destroyed
// runnables are enqueued, we're guaranteed to run after.
mPhase = eWaitForUnloadMessage;
NS_DispatchToCurrentThread(this);
}
break;
case eWaitForUnloadMessage:
// The *-window-destroyed observers have finished running at this
// point. However, it's possible that a *-window-destroyed observer might
// have sent a message using the message manager. These messages might not
// have been processed yet. So we enqueue ourselves again to ensure that
// DestroyComplete runs after all messages sent by *-window-destroyed
// observers have been processed.
mPhase = eDestroyComplete;
NS_DispatchToCurrentThread(this);
break;
case eDestroyComplete:
// Now that all messages sent by unload listeners and window destroyed
// observers have been processed, we disconnect the message manager and
// finish destruction.
mFrameLoader->DestroyComplete();
break;
}
return NS_OK;
}
void nsFrameLoader::DestroyDocShell() {
// This code runs after the frameloader has been detached from the <browser>
// element. We postpone this work because we may not be allowed to run
// script at that time.
// Ask the BrowserChild to fire the frame script "unload" event, destroy its
// docshell, and finally destroy the PBrowser actor. This eventually leads to
// nsFrameLoader::DestroyComplete being called.
if (mRemoteBrowser) {
mRemoteBrowser->DestroyStart();
}
// Fire the "unload" event if we're in-process.
if (mChildMessageManager) {
mChildMessageManager->FireUnloadEvent();
}
if (mSessionStoreChild) {
mSessionStoreChild->Stop();
mSessionStoreChild = nullptr;
}
// Destroy the docshell.
if (GetDocShell()) {
GetDocShell()->Destroy();
}
if (!mWillChangeProcess && mPendingBrowsingContext &&
mPendingBrowsingContext->EverAttached()) {
mPendingBrowsingContext->Detach();
}
mPendingBrowsingContext = nullptr;
mDocShell = nullptr;
if (mChildMessageManager) {
// Stop handling events in the in-process frame script.
mChildMessageManager->DisconnectEventListeners();
}
}
void nsFrameLoader::DestroyComplete() {
// We get here, as part of StartDestroy, after the docshell has been destroyed
// and all message manager messages sent during docshell destruction have been
// dispatched. We also get here if the child process crashes. In the latter
// case, StartDestroy might not have been called.
// Drop the strong references created in StartDestroy.
if (mChildMessageManager || mRemoteBrowser) {
mOwnerContentStrong = nullptr;
if (auto* browserParent = GetBrowserParent()) {
browserParent->CacheFrameLoader(nullptr);
}
if (mChildMessageManager) {
mChildMessageManager->CacheFrameLoader(nullptr);
}
}
// Call BrowserParent::Destroy if we haven't already (in case of a crash).
if (mRemoteBrowser) {
mRemoteBrowser->DestroyComplete();
mRemoteBrowser = nullptr;
}
if (mMessageManager) {
mMessageManager->Disconnect();
}
if (mChildMessageManager) {
mChildMessageManager->Disconnect();
}
mMessageManager = nullptr;
mChildMessageManager = nullptr;
}
void nsFrameLoader::SetOwnerContent(Element* aContent) {
if (mObservingOwnerContent) {
mObservingOwnerContent = false;
mOwnerContent->RemoveMutationObserver(this);
}
// XXXBFCache Need to update also all the non-current FrameLoaders in the
// owner when moving a FrameLoader.
// This temporary setup doesn't crash, but behaves badly with bfcached docs.
if (RefPtr<nsFrameLoaderOwner> owner = do_QueryObject(mOwnerContent)) {
owner->DetachFrameLoader(this);
}
mOwnerContent = aContent;
if (RefPtr<nsFrameLoaderOwner> owner = do_QueryObject(mOwnerContent)) {
owner->AttachFrameLoader(this);
#ifdef NIGHTLY_BUILD
if (mozilla::BFCacheInParent() && XRE_IsParentProcess()) {
if (BrowsingContext* bc = GetMaybePendingBrowsingContext()) {
nsISHistory* shistory = bc->Canonical()->GetSessionHistory();
if (shistory) {
uint32_t count = shistory->GetCount();
for (uint32_t i = 0; i < count; ++i) {
nsCOMPtr<nsISHEntry> entry;
shistory->GetEntryAtIndex(i, getter_AddRefs(entry));
nsCOMPtr<SessionHistoryEntry> she = do_QueryInterface(entry);
MOZ_RELEASE_ASSERT(!she || !she->GetFrameLoader());
}
}
}
}
#endif
}
if (mSessionStoreChild && mOwnerContent) {
// mOwnerContent will only be null when the frame loader is being destroyed,
// so the session store listener will be destroyed along with it.
mSessionStoreChild->SetOwnerContent(mOwnerContent);
}
if (RefPtr<BrowsingContext> browsingContext = GetExtantBrowsingContext()) {
browsingContext->SetEmbedderElement(mOwnerContent);
}
if (mSessionStoreChild) {
// UpdateEventTargets will requery its browser contexts for event
// targets, so this call needs to happen after the call to
// SetEmbedderElement above.
mSessionStoreChild->UpdateEventTargets();
}
AutoJSAPI jsapi;
jsapi.Init();
JS::Rooted<JSObject*> wrapper(jsapi.cx(), GetWrapper());
if (wrapper) {
JSAutoRealm ar(jsapi.cx(), wrapper);
IgnoredErrorResult rv;
UpdateReflectorGlobal(jsapi.cx(), wrapper, rv);
Unused << NS_WARN_IF(rv.Failed());
}
}
nsIContent* nsFrameLoader::GetParentObject() const { return mOwnerContent; }
void nsFrameLoader::AssertSafeToInit() {
MOZ_DIAGNOSTIC_ASSERT(nsContentUtils::IsSafeToRunScript() ||
mOwnerContent->OwnerDoc()->IsStaticDocument(),
"FrameLoader should never be initialized during "
"document update or reflow!");
}
nsresult nsFrameLoader::MaybeCreateDocShell() {
if (GetDocShell()) {
return NS_OK;
}
if (IsRemoteFrame()) {
return NS_OK;
}
NS_ENSURE_STATE(!mDestroyCalled);
AssertSafeToInit();
// Get our parent docshell off the document of mOwnerContent
// XXXbz this is such a total hack.... We really need to have a
// better setup for doing this.
Document* doc = mOwnerContent->OwnerDoc();
MOZ_RELEASE_ASSERT(!doc->IsResourceDoc(), "We shouldn't even exist");
// If we've already tried to initialize and failed, don't try again.
if (mInitialized) {
return NS_ERROR_NOT_AVAILABLE;
}
mInitialized = true;
// Check if the document still has a window since it is possible for an
// iframe to be inserted and cause the creation of the docshell in a
if (!doc->IsStaticDocument() &&
(!doc->GetWindow() || !mOwnerContent->IsInComposedDoc())) {
return NS_ERROR_UNEXPECTED;
}
if (!doc->IsActive()) {
// Don't allow subframe loads in non-active documents.
return NS_ERROR_NOT_AVAILABLE;
}
RefPtr<nsDocShell> parentDocShell = nsDocShell::Cast(doc->GetDocShell());
if (NS_WARN_IF(!parentDocShell)) {
return NS_ERROR_UNEXPECTED;
}
if (doc->GetWindowContext()->IsDiscarded() ||
parentDocShell->GetBrowsingContext()->IsDiscarded()) {
// Don't allow subframe loads in discarded contexts.
return NS_ERROR_NOT_AVAILABLE;
}
if (!EnsureBrowsingContextAttached()) {
return NS_ERROR_FAILURE;
}
mPendingBrowsingContext->SetEmbedderElement(mOwnerContent);
// nsDocShell::Create will attach itself to the passed browsing
// context inside of nsDocShell::Create
RefPtr<nsDocShell> docShell = nsDocShell::Create(mPendingBrowsingContext);
NS_ENSURE_TRUE(docShell, NS_ERROR_FAILURE);
mDocShell = docShell;
mPendingBrowsingContext->Embed();
InvokeBrowsingContextReadyCallback();
mIsTopLevelContent = mPendingBrowsingContext->IsTopContent();
if (mIsTopLevelContent) {
// Manually add ourselves to our parent's docshell, as BrowsingContext won't
// have done this for us.
//
// XXX(nika): Consider removing the DocShellTree in the future, for
// consistency between local and remote frames..
parentDocShell->AddChild(docShell);
}
// Now that we are part of the DocShellTree, attach our DocShell to our
// parent's TreeOwner.
nsCOMPtr<nsIDocShellTreeOwner> parentTreeOwner;
parentDocShell->GetTreeOwner(getter_AddRefs(parentTreeOwner));
AddTreeItemToTreeOwner(docShell, parentTreeOwner);
// Make sure all nsDocShells have links back to the content element in the
// nearest enclosing chrome shell.
RefPtr<EventTarget> chromeEventHandler;
bool parentIsContent = parentDocShell->GetBrowsingContext()->IsContent();
if (parentIsContent) {
// Our parent shell is a content shell. Get the chrome event handler from it
// and use that for our shell as well.
parentDocShell->GetChromeEventHandler(getter_AddRefs(chromeEventHandler));
} else {
// Our parent shell is a chrome shell. It is therefore our nearest enclosing
// chrome shell.
chromeEventHandler = mOwnerContent;
}
docShell->SetChromeEventHandler(chromeEventHandler);
// This is nasty, this code (the docShell->GetWindow() below)
// *must* come *after* the above call to
// docShell->SetChromeEventHandler() for the global window to get
// the right chrome event handler.
// Tell the window about the frame that hosts it.
nsCOMPtr<nsPIDOMWindowOuter> newWindow = docShell->GetWindow();
if (NS_WARN_IF(!newWindow)) {
NS_WARNING("Something wrong when creating the docshell for a frameloader!");
return NS_ERROR_FAILURE;
}
newWindow->SetFrameElementInternal(mOwnerContent);
// Allow scripts to close the docshell if specified.
if (mOwnerContent->IsXULElement(nsGkAtoms::browser) &&
mOwnerContent->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::allowscriptstoclose,
nsGkAtoms::_true, eCaseMatters)) {
nsGlobalWindowOuter::Cast(newWindow)->AllowScriptsToClose();
}
if (!docShell->Initialize()) {
NS_WARNING("Something wrong when creating the docshell for a frameloader!");
return NS_ERROR_FAILURE;
}
NS_ENSURE_STATE(mOwnerContent);
// If we are an in-process browser, we want to set up our session history.
if (mIsTopLevelContent && mOwnerContent->IsXULElement(nsGkAtoms::browser) &&
!mOwnerContent->HasAttr(nsGkAtoms::disablehistory)) {
// XXX(nika): Set this up more explicitly?
mPendingBrowsingContext->InitSessionHistory();
}
// Apply sandbox flags even if our owner is not an iframe, as this copies
// flags from our owning content's owning document.
// Note: ApplySandboxFlags should be called after docShell->SetIsFrame
// because we need to get the correct presentation URL in ApplySandboxFlags.
uint32_t sandboxFlags = 0;
HTMLIFrameElement* iframe = HTMLIFrameElement::FromNode(mOwnerContent);
if (iframe) {
sandboxFlags = iframe->GetSandboxFlags();
}
ApplySandboxFlags(sandboxFlags);
MOZ_ALWAYS_SUCCEEDS(mPendingBrowsingContext->SetInitialSandboxFlags(
mPendingBrowsingContext->GetSandboxFlags()));
ReallyLoadFrameScripts();
// Previously we would forcibly create the initial about:blank document for
// in-process content frames from a frame script which eagerly loaded in
// every tab. This lead to other frontend components growing dependencies on
// for details.
//
// We also eagerly create the initial about:blank document for remote loads
// separately when initializing BrowserChild.
if (mIsTopLevelContent &&
mPendingBrowsingContext->GetMessageManagerGroup() == u"browsers"_ns) {
Unused << mDocShell->GetDocument();
}
return NS_OK;
}
void nsFrameLoader::GetURL(nsString& aURI, nsIPrincipal** aTriggeringPrincipal,
nsIContentSecurityPolicy** aCsp) {
aURI.Truncate();
// Within this function we default to using the NodePrincipal as the
// triggeringPrincipal and the CSP of the document.
// Expanded Principals however override the CSP of the document, hence
// if frame->GetSrcTriggeringPrincipal() returns a valid principal, we
// have to query the CSP from that Principal.
nsCOMPtr<nsIPrincipal> triggeringPrincipal = mOwnerContent->NodePrincipal();
nsCOMPtr<nsIContentSecurityPolicy> csp = mOwnerContent->GetCsp();
if (mOwnerContent->IsHTMLElement(nsGkAtoms::object)) {
mOwnerContent->GetAttr(nsGkAtoms::data, aURI);
} else {
mOwnerContent->GetAttr(nsGkAtoms::src, aURI);
if (RefPtr<nsGenericHTMLFrameElement> frame =
do_QueryObject(mOwnerContent)) {
nsCOMPtr<nsIPrincipal> srcPrincipal = frame->GetSrcTriggeringPrincipal();
if (srcPrincipal) {
triggeringPrincipal = srcPrincipal;
nsCOMPtr<nsIExpandedPrincipal> ep =
do_QueryInterface(triggeringPrincipal);
if (ep) {
csp = ep->GetCsp();
}
}
}
}
triggeringPrincipal.forget(aTriggeringPrincipal);
csp.forget(aCsp);
}
nsresult nsFrameLoader::CheckForRecursiveLoad(nsIURI* aURI) {
MOZ_ASSERT(!IsRemoteFrame(),
"Shouldn't call CheckForRecursiveLoad on remote frames.");
mDepthTooGreat = false;
RefPtr<BrowsingContext> parentBC(
mOwnerContent->OwnerDoc()->GetBrowsingContext());
NS_ENSURE_STATE(parentBC);
if (!parentBC->IsContent()) {
return NS_OK;
}
// (MAX_DEPTH_CONTENT_FRAMES)
int32_t depth = 0;
for (BrowsingContext* bc = parentBC; bc; bc = bc->GetParent()) {
++depth;
if (depth >= MAX_DEPTH_CONTENT_FRAMES) {
mDepthTooGreat = true;
NS_WARNING("Too many nested content frames so giving up");
return NS_ERROR_UNEXPECTED; // Too deep, give up! (silently?)
}
}
return NS_OK;
}
nsresult nsFrameLoader::GetWindowDimensions(LayoutDeviceIntRect& aRect) {
if (!mOwnerContent) {
return NS_ERROR_FAILURE;
}
// Need to get outer window position here
Document* doc = mOwnerContent->GetComposedDoc();
if (!doc) {
return NS_ERROR_FAILURE;
}
MOZ_RELEASE_ASSERT(!doc->IsResourceDoc(), "We shouldn't even exist");
nsCOMPtr<nsPIDOMWindowOuter> win = doc->GetWindow();
if (!win) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDocShellTreeItem> parentAsItem(win->GetDocShell());
if (!parentAsItem) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDocShellTreeOwner> parentOwner;
if (NS_FAILED(parentAsItem->GetTreeOwner(getter_AddRefs(parentOwner))) ||
!parentOwner) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIBaseWindow> treeOwnerAsWin(do_GetInterface(parentOwner));
aRect.MoveTo(treeOwnerAsWin->GetPosition());
aRect.SizeTo(treeOwnerAsWin->GetSize());
return NS_OK;
}
nsresult nsFrameLoader::UpdatePositionAndSize(nsSubDocumentFrame* aFrame) {
const auto size = aFrame->GetSubdocumentSize();
mLazySize = size;
if (IsRemoteFrame()) {
if (mRemoteBrowser) {
// If we were not able to show remote frame before, we should probably
// retry now to send correct showInfo.
if (!mRemoteBrowserShown) {
ShowRemoteFrame(aFrame);
}
LayoutDeviceIntRect dimensions;
MOZ_TRY(GetWindowDimensions(dimensions));
mRemoteBrowser->UpdateDimensions(dimensions, size);
mRemoteBrowserSized = true;
}
return NS_OK;
}
nsCOMPtr<nsIBaseWindow> baseWindow = GetDocShell(IgnoreErrors());
if (!baseWindow) {
return NS_OK;
}
int32_t x = 0;
int32_t y = 0;
AutoWeakFrame weakFrame(aFrame);
baseWindow->GetPosition(&x, &y);
if (!weakFrame.IsAlive()) {
// GetPosition() killed us
return NS_OK;
}
baseWindow->SetPositionAndSize(x, y, size.width, size.height,
nsIBaseWindow::eDelayResize);
return NS_OK;
}
void nsFrameLoader::PropagateIsUnderHiddenEmbedderElement(
bool aIsUnderHiddenEmbedderElement) {
bool isUnderHiddenEmbedderElement = true;
if (Document* ownerDoc = GetOwnerDoc()) {
if (PresShell* presShell = ownerDoc->GetPresShell()) {
isUnderHiddenEmbedderElement = presShell->IsUnderHiddenEmbedderElement();
}
}
isUnderHiddenEmbedderElement |= aIsUnderHiddenEmbedderElement;
BrowsingContext* browsingContext = GetExtantBrowsingContext();
if (browsingContext && browsingContext->IsUnderHiddenEmbedderElement() !=
isUnderHiddenEmbedderElement) {
Unused << browsingContext->SetIsUnderHiddenEmbedderElement(
isUnderHiddenEmbedderElement);
}
}
void nsFrameLoader::UpdateRemoteStyle(
mozilla::StyleImageRendering aImageRendering) {
MOZ_DIAGNOSTIC_ASSERT(IsRemoteFrame());
if (auto* browserBridgeChild = GetBrowserBridgeChild()) {
browserBridgeChild->SendUpdateRemoteStyle(aImageRendering);
}
}
uint32_t nsFrameLoader::LazyWidth() const {
uint32_t lazyWidth = mLazySize.width;
if (nsIFrame* frame = GetPrimaryFrameOfOwningContent()) {
lazyWidth = frame->PresContext()->DevPixelsToIntCSSPixels(lazyWidth);
}
return lazyWidth;
}
uint32_t nsFrameLoader::LazyHeight() const {
uint32_t lazyHeight = mLazySize.height;
if (nsIFrame* frame = GetPrimaryFrameOfOwningContent()) {
lazyHeight = frame->PresContext()->DevPixelsToIntCSSPixels(lazyHeight);
}
return lazyHeight;
}
bool nsFrameLoader::EnsureRemoteBrowser() {
MOZ_ASSERT(IsRemoteFrame());
return mRemoteBrowser || TryRemoteBrowser();
}
bool nsFrameLoader::TryRemoteBrowserInternal() {
NS_ASSERTION(!mRemoteBrowser,
"TryRemoteBrowser called with a remote browser already?");
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess(),
"Remote subframes should only be created using the "
"`CanonicalBrowsingContext::ChangeRemoteness` API");
AssertSafeToInit();
if (!mOwnerContent) {
return false;
}
// XXXsmaug Per spec (2014/08/21) frameloader should not work in case the
// element isn't in document, only in shadow dom, but that will change
RefPtr<Document> doc = mOwnerContent->GetComposedDoc();
if (!doc) {
return false;
}
MOZ_RELEASE_ASSERT(!doc->IsResourceDoc(), "We shouldn't even exist");
// Graphics initialization code relies on having a frame for the
// remote browser case, as we can be inside a popup, which is a different
// widget.
if (!mOwnerContent->GetPrimaryFrame()) {
doc->FlushPendingNotifications(FlushType::Frames);
}
// The flush could have initialized us.
if (mRemoteBrowser) {
return true;
}
// If we've already tried to initialize and failed, don't try again.
if (mInitialized) {
return false;
}
mInitialized = true;
// Ensure the world hasn't changed that much as a result of that.
if (!mOwnerContent || mOwnerContent->OwnerDoc() != doc ||
!mOwnerContent->IsInComposedDoc()) {
return false;
}
if (RefPtr<nsFrameLoaderOwner> flo = do_QueryObject(mOwnerContent)) {
RefPtr<nsFrameLoader> fl = flo->GetFrameLoader();
if (fl != this) {
MOZ_ASSERT_UNREACHABLE(
"Got TryRemoteBrowserInternal but mOwnerContent already has a "
"different frameloader?");
return false;
}
}
if (!doc->IsActive()) {
// Don't allow subframe loads in non-active documents.
return false;
}
nsCOMPtr<nsPIDOMWindowOuter> parentWin = doc->GetWindow();
if (!parentWin) {
return false;
}
nsCOMPtr<nsIDocShell> parentDocShell = parentWin->GetDocShell();
if (!parentDocShell) {
return false;
}
if (!EnsureBrowsingContextAttached()) {
return false;
}
if (mPendingBrowsingContext->IsTop()) {
mPendingBrowsingContext->InitSessionHistory();
}
// iframes for JS plugins also get to skip these checks. We control the URL
// that gets loaded, but the load is triggered from the document containing
// the plugin.
// out of process iframes also get to skip this check.
if (!XRE_IsContentProcess()) {
if (parentDocShell->ItemType() != nsIDocShellTreeItem::typeChrome) {
// Allow three exceptions to this rule :
// - about:addons so it can load remote extension options pages
// - about:preferences (in Thunderbird only) so it can load remote
// extension options pages for FileLink providers
// - DevTools webext panels if DevTools is loaded in a content frame
// - DevTools Network Monitor, which uses content frame for HTML request
// previews
// - Chrome mochitests can also do this.
//
// Note that the new frame's message manager will not be a child of the
// chrome window message manager, and, the values of window.top and
// window.parent will be different than they would be for a non-remote
// frame.
nsIURI* parentURI = parentWin->GetDocumentURI();
if (!parentURI) {
return false;
}
nsAutoCString specIgnoringRef;
if (NS_FAILED(parentURI->GetSpecIgnoringRef(specIgnoringRef))) {
return false;
}
const bool allowed = [&] {
const nsLiteralCString kAllowedURIs[] = {
"about:addons"_ns,
"chrome://mozapps/content/extensions/aboutaddons.html"_ns,
#ifdef MOZ_THUNDERBIRD
"about:3pane"_ns,
"about:message"_ns,
"about:preferences"_ns,
#endif
"chrome://browser/content/webext-panels.xhtml"_ns,
"chrome://devtools/content/netmonitor/index.html"_ns,
"chrome://devtools/content/webconsole/index.html"_ns,
};
for (const auto& allowedURI : kAllowedURIs) {
if (specIgnoringRef.Equals(allowedURI)) {
return true;
}
}
if (xpc::IsInAutomation() &&
StringBeginsWith(specIgnoringRef,
return true;
}
return false;
}();
if (!allowed) {
NS_WARNING(
nsPrintfCString("Forbidden remote frame from content docshell %s",
specIgnoringRef.get())
.get());
return false;
}
}
if (!mOwnerContent->IsXULElement()) {
return false;
}
if (!mOwnerContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
nsGkAtoms::content, eIgnoreCase)) {
return false;
}
}
uint32_t chromeFlags = 0;
nsCOMPtr<nsIDocShellTreeOwner> parentOwner;
if (NS_FAILED(parentDocShell->GetTreeOwner(getter_AddRefs(parentOwner))) ||
!parentOwner) {
return false;
}
nsCOMPtr<nsIAppWindow> window(do_GetInterface(parentOwner));
if (window && NS_FAILED(window->GetChromeFlags(&chromeFlags))) {
return false;
}
AUTO_PROFILER_LABEL("nsFrameLoader::TryRemoteBrowser:Create", OTHER);
MutableTabContext context;
nsresult rv = GetNewTabContext(&context);
NS_ENSURE_SUCCESS(rv, false);
RefPtr<Element> ownerElement = mOwnerContent;
RefPtr<BrowserParent> nextRemoteBrowser =
mOpenWindowInfo ? mOpenWindowInfo->GetNextRemoteBrowser() : nullptr;
if (nextRemoteBrowser) {
mRemoteBrowser = new BrowserHost(nextRemoteBrowser);
if (nextRemoteBrowser->GetOwnerElement()) {
MOZ_ASSERT_UNREACHABLE("Shouldn't have an owner element before");
return false;
}
nextRemoteBrowser->SetOwnerElement(ownerElement);
} else {
RefPtr<ContentParent> contentParent;
if (mChildID != 0) {
ContentProcessManager* cpm = ContentProcessManager::GetSingleton();
if (!cpm) {
return false;
}
contentParent = cpm->GetContentProcessById(ContentParentId(mChildID));
}
mRemoteBrowser =
ContentParent::CreateBrowser(context, ownerElement, mRemoteType,
mPendingBrowsingContext, contentParent);
}
if (!mRemoteBrowser) {
return false;
}
MOZ_DIAGNOSTIC_ASSERT(mPendingBrowsingContext ==
mRemoteBrowser->GetBrowsingContext());
mRemoteBrowser->GetBrowsingContext()->Embed();
InvokeBrowsingContextReadyCallback();
// Grab the reference to the actor
RefPtr<BrowserParent> browserParent = GetBrowserParent();
MOZ_ASSERT(browserParent->CanSend(), "BrowserParent cannot send?");
// We no longer need the remoteType attribute on the frame element.
// The remoteType can be queried by asking the message manager instead.
ownerElement->UnsetAttr(kNameSpaceID_None, nsGkAtoms::RemoteType, false);
// Now that browserParent is set, we can initialize graphics
browserParent->InitRendering();
MaybeUpdatePrimaryBrowserParent(eBrowserParentChanged);
mChildID = browserParent->Manager()->ChildID();
nsCOMPtr<nsIDocShellTreeItem> rootItem;
parentDocShell->GetInProcessRootTreeItem(getter_AddRefs(rootItem));
RefPtr<nsGlobalWindowOuter> rootWin =
nsGlobalWindowOuter::Cast(rootItem->GetWindow());
if (rootWin && rootWin->IsChromeWindow()) {
browserParent->SetBrowserDOMWindow(rootWin->GetBrowserDOMWindow());
}
// For xul:browsers, update some settings based on attributes:
if (mOwnerContent->IsXULElement()) {
// Send down the name of the browser through browserParent if it is set.
nsAutoString frameName;
mOwnerContent->GetAttr(nsGkAtoms::name, frameName);
if (nsContentUtils::IsOverridingWindowName(frameName)) {
MOZ_ALWAYS_SUCCEEDS(mPendingBrowsingContext->SetName(frameName));
}
// Allow scripts to close the window if the browser specified so:
if (mOwnerContent->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::allowscriptstoclose,
nsGkAtoms::_true, eCaseMatters)) {
Unused << browserParent->SendAllowScriptsToClose();
}
}
ReallyLoadFrameScripts();
return true;
}
bool nsFrameLoader::TryRemoteBrowser() {
// NOTE: Do not add new checks to this function, it exists to ensure we always
// MaybeNotifyCrashed for any errors within TryRemoteBrowserInternal. If new
// checks are added, they should be added into that function, not here.
// Try to create the internal remote browser.
if (TryRemoteBrowserInternal()) {
return true;
}
// We shouldn't TryRemoteBrowser again, even if a check failed before we
// initialize mInitialized within TryRemoteBrowserInternal.
mInitialized = true;
// Check if we should report a browser-crashed error because the browser
// failed to start.
if (XRE_IsParentProcess() && mOwnerContent && mOwnerContent->IsXULElement()) {
MaybeNotifyCrashed(nullptr, ContentParentId(), nullptr);
}
return false;
}
nsIFrame* nsFrameLoader::GetPrimaryFrameOfOwningContent() const {
return mOwnerContent ? mOwnerContent->GetPrimaryFrame() : nullptr;
}
Document* nsFrameLoader::GetOwnerDoc() const {
return mOwnerContent ? mOwnerContent->OwnerDoc() : nullptr;
}
BrowserParent* nsFrameLoader::GetBrowserParent() const {
if (!mRemoteBrowser) {
return nullptr;
}
RefPtr<BrowserHost> browserHost = mRemoteBrowser->AsBrowserHost();
if (!browserHost) {
return nullptr;
}
return browserHost->GetActor();
}
BrowserBridgeChild* nsFrameLoader::GetBrowserBridgeChild() const {
if (!mRemoteBrowser) {
return nullptr;
}
RefPtr<BrowserBridgeHost> browserBridgeHost =
mRemoteBrowser->AsBrowserBridgeHost();
if (!browserBridgeHost) {
return nullptr;
}
return browserBridgeHost->GetActor();
}
mozilla::layers::LayersId nsFrameLoader::GetLayersId() const {
MOZ_ASSERT(mIsRemoteFrame);
return mRemoteBrowser->GetLayersId();
}
nsresult nsFrameLoader::DoRemoteStaticClone(nsFrameLoader* aStaticCloneOf,
nsIPrintSettings* aPrintSettings) {
MOZ_ASSERT(aStaticCloneOf->IsRemoteFrame());
MOZ_ASSERT(aPrintSettings);
auto* cc = ContentChild::GetSingleton();
if (!cc) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
// TODO: Could possibly be implemented without too much effort.
return NS_ERROR_NOT_IMPLEMENTED;
}
BrowsingContext* bcToClone = aStaticCloneOf->GetBrowsingContext();
if (NS_WARN_IF(!bcToClone)) {
return NS_ERROR_UNEXPECTED;
}
BrowsingContext* bc = GetBrowsingContext();
MOZ_DIAGNOSTIC_ASSERT(bc);
nsCOMPtr<nsIPrintSettingsService> printSettingsSvc =
do_GetService("@mozilla.org/gfx/printsettings-service;1");
if (NS_WARN_IF(!printSettingsSvc)) {
return NS_ERROR_UNEXPECTED;
}
embedding::PrintData printData;
nsresult rv =
printSettingsSvc->SerializeToPrintData(aPrintSettings, &printData);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
cc->SendCloneDocumentTreeInto(bcToClone, bc, printData);
return NS_OK;
}
nsresult nsFrameLoader::FinishStaticClone(
nsFrameLoader* aStaticCloneOf, nsIPrintSettings* aPrintSettings,
bool* aOutHasInProcessPrintCallbacks) {
MOZ_DIAGNOSTIC_ASSERT(
!nsContentUtils::IsSafeToRunScript(),
"A script blocker should be on the stack while FinishStaticClone is run");
// NOTE: We don't check `aStaticCloneOf->IsDead()` here, as the nsFrameLoader
// which we're a static clone of may be in the process of being destroyed. It
// won't be fully destroyed when `FinishStaticClone` is called, as a script
// blocker on our caller's stack is preventing it from becoming finalized.
//
// This is quite fragile, but is quite difficult to work around without
// getting print-preview to stop re-cloning and replacing the previewed
// document when changing layout.
if (NS_WARN_IF(IsDead())) {
return NS_ERROR_UNEXPECTED;
}
if (aStaticCloneOf->IsRemoteFrame()) {
return DoRemoteStaticClone(aStaticCloneOf, aPrintSettings);
}
nsIDocShell* origDocShell = aStaticCloneOf->GetDocShell();
NS_ENSURE_STATE(origDocShell);
nsCOMPtr<Document> doc = origDocShell->GetDocument();
NS_ENSURE_STATE(doc);
MaybeCreateDocShell();
RefPtr<nsDocShell> docShell = GetDocShell();
NS_ENSURE_STATE(docShell);
nsCOMPtr<Document> kungFuDeathGrip = docShell->GetDocument();
Unused << kungFuDeathGrip;
nsCOMPtr<nsIDocumentViewer> viewer;
docShell->GetDocViewer(getter_AddRefs(viewer));
NS_ENSURE_STATE(viewer);
nsCOMPtr<Document> clonedDoc = doc->CreateStaticClone(
docShell, viewer, aPrintSettings, aOutHasInProcessPrintCallbacks);
return NS_OK;
}
bool nsFrameLoader::DoLoadMessageManagerScript(const nsAString& aURL,
bool aRunInGlobalScope) {
if (auto* browserParent = GetBrowserParent()) {
return browserParent->SendLoadRemoteScript(aURL, aRunInGlobalScope);
}
RefPtr<InProcessBrowserChildMessageManager> browserChild =
GetBrowserChildMessageManager();
if (browserChild) {
browserChild->LoadFrameScript(aURL, aRunInGlobalScope);
}
return true;
}
class nsAsyncMessageToChild : public nsSameProcessAsyncMessageBase,
public Runnable {
public:
explicit nsAsyncMessageToChild(nsFrameLoader* aFrameLoader)
: mozilla::Runnable("nsAsyncMessageToChild"),
mFrameLoader(aFrameLoader) {}
NS_IMETHOD Run() override {
InProcessBrowserChildMessageManager* browserChild =
mFrameLoader->mChildMessageManager;
// destroyed. Here we make sure that those messages are not delivered.
if (browserChild && browserChild->GetInnerManager() &&
mFrameLoader->GetExistingDocShell()) {
JS::Rooted<JSObject*> kungFuDeathGrip(dom::RootingCx(),
browserChild->GetWrapper());
ReceiveMessage(static_cast<EventTarget*>(browserChild), mFrameLoader,
browserChild->GetInnerManager());
}
return NS_OK;
}
RefPtr<nsFrameLoader> mFrameLoader;
};
nsresult nsFrameLoader::DoSendAsyncMessage(const nsAString& aMessage,
StructuredCloneData& aData) {
auto* browserParent = GetBrowserParent();
if (browserParent) {
ClonedMessageData data;
if (!BuildClonedMessageData(aData, data)) {
MOZ_CRASH();
return NS_ERROR_DOM_DATA_CLONE_ERR;
}
if (browserParent->SendAsyncMessage(aMessage, data)) {
return NS_OK;
} else {
return NS_ERROR_UNEXPECTED;
}
}
if (mChildMessageManager) {
RefPtr<nsAsyncMessageToChild> ev = new nsAsyncMessageToChild(this);
nsresult rv = ev->Init(aMessage, aData);
if (NS_FAILED(rv)) {
return rv;
}
rv = NS_DispatchToCurrentThread(ev);
if (NS_FAILED(rv)) {
return rv;
}
return rv;
}
// We don't have any targets to send our asynchronous message to.
return NS_ERROR_UNEXPECTED;
}
already_AddRefed<MessageSender> nsFrameLoader::GetMessageManager() {
EnsureMessageManager();
return do_AddRef(mMessageManager);
}
nsresult nsFrameLoader::EnsureMessageManager() {
NS_ENSURE_STATE(mOwnerContent);
if (mMessageManager) {
return NS_OK;
}
if (!mIsTopLevelContent && !IsRemoteFrame() &&
!(mOwnerContent->IsXULElement() &&
mOwnerContent->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::forcemessagemanager,
nsGkAtoms::_true, eCaseMatters))) {
return NS_OK;
}
RefPtr<nsGlobalWindowOuter> window =
nsGlobalWindowOuter::Cast(GetOwnerDoc()->GetWindow());
RefPtr<ChromeMessageBroadcaster> parentManager;
if (window && window->IsChromeWindow()) {
nsAutoString messagemanagergroup;
if (mOwnerContent->IsXULElement() &&
mOwnerContent->GetAttr(nsGkAtoms::messagemanagergroup,
messagemanagergroup)) {
parentManager = window->GetGroupMessageManager(messagemanagergroup);
}
if (!parentManager) {
parentManager = window->GetMessageManager();
}
} else {
parentManager = nsFrameMessageManager::GetGlobalMessageManager();
}
mMessageManager = new ChromeMessageSender(parentManager);
if (!IsRemoteFrame()) {
nsresult rv = MaybeCreateDocShell();
if (NS_FAILED(rv)) {
return rv;
}
MOZ_ASSERT(GetDocShell(),
"MaybeCreateDocShell succeeded, but null docShell");
if (!GetDocShell()) {
return NS_ERROR_FAILURE;
}
mChildMessageManager = InProcessBrowserChildMessageManager::Create(
GetDocShell(), mOwnerContent, mMessageManager);
NS_ENSURE_TRUE(mChildMessageManager, NS_ERROR_UNEXPECTED);
// Set up session store
if (SessionStorePlatformCollection()) {
if (XRE_IsParentProcess() && mIsTopLevelContent) {
mSessionStoreChild = SessionStoreChild::GetOrCreate(
GetExtantBrowsingContext(), mOwnerContent);
}
}
}
return NS_OK;
}
nsresult nsFrameLoader::ReallyLoadFrameScripts() {
nsresult rv = EnsureMessageManager();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (mMessageManager) {
mMessageManager->InitWithCallback(this);
}
return NS_OK;
}
already_AddRefed<Element> nsFrameLoader::GetOwnerElement() {
return do_AddRef(mOwnerContent);
}
const LazyLoadFrameResumptionState&
nsFrameLoader::GetLazyLoadFrameResumptionState() {
static const LazyLoadFrameResumptionState sEmpty;
if (auto* iframe = HTMLIFrameElement::FromNode(*mOwnerContent)) {
return iframe->GetLazyLoadFrameResumptionState();
}
return sEmpty;
}
void nsFrameLoader::SetDetachedSubdocFrame(nsIFrame* aDetachedFrame) {
mDetachedSubdocFrame = aDetachedFrame;
mHadDetachedFrame = !!aDetachedFrame;
}
nsIFrame* nsFrameLoader::GetDetachedSubdocFrame(bool* aOutIsSet) const {
if (aOutIsSet) {
*aOutIsSet = mHadDetachedFrame;
}
return mDetachedSubdocFrame.GetFrame();
}
void nsFrameLoader::ApplySandboxFlags(uint32_t sandboxFlags) {
// If our BrowsingContext doesn't exist yet, it means we haven't been
// initialized yet. This method will be called again once we're initialized
// from MaybeCreateDocShell. <iframe> BrowsingContexts are never created as
// initially remote, so we don't need to worry about updating sandbox flags
// for an uninitialized initially-remote iframe.
BrowsingContext* context = GetExtantBrowsingContext();
if (!context) {
MOZ_ASSERT(!IsRemoteFrame(),
"cannot apply sandbox flags to an uninitialized "
"initially-remote frame");
return;
}
uint32_t parentSandboxFlags = mOwnerContent->OwnerDoc()->GetSandboxFlags();
// The child can only add restrictions, never remove them.
sandboxFlags |= parentSandboxFlags;
MOZ_ALWAYS_SUCCEEDS(context->SetSandboxFlags(sandboxFlags));
}
/* virtual */
void nsFrameLoader::AttributeChanged(mozilla::dom::Element* aElement,
int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType,
const nsAttrValue* aOldValue) {
MOZ_ASSERT(mObservingOwnerContent);
if (aElement != mOwnerContent) {
return;
}
if (aNameSpaceID != kNameSpaceID_None ||
(aAttribute != TypeAttrName(aElement) &&
aAttribute != nsGkAtoms::primary)) {
return;
}
// Note: This logic duplicates a lot of logic in
// MaybeCreateDocshell. We should fix that.
// Notify our enclosing chrome that our type has changed. We only do this
// if our parent is chrome, since in all other cases we're random content
// subframes and the treeowner shouldn't worry about us.
if (!GetDocShell()) {
MaybeUpdatePrimaryBrowserParent(eBrowserParentChanged);
return;
}
nsCOMPtr<nsIDocShellTreeItem> parentItem;
GetDocShell()->GetInProcessParent(getter_AddRefs(parentItem));
if (!parentItem) {
return;
}
if (parentItem->ItemType() != nsIDocShellTreeItem::typeChrome) {
return;
}
nsCOMPtr<nsIDocShellTreeOwner> parentTreeOwner;
parentItem->GetTreeOwner(getter_AddRefs(parentTreeOwner));
if (!parentTreeOwner) {
return;
}
bool is_primary = aElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::primary,
nsGkAtoms::_true, eIgnoreCase);
// when a content panel is no longer primary, hide any open popups it may have
if (!is_primary) {
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
pm->HidePopupsInDocShell(GetDocShell());
}
}
parentTreeOwner->ContentShellRemoved(GetDocShell());
if (aElement->AttrValueIs(kNameSpaceID_None, TypeAttrName(aElement),
nsGkAtoms::content, eIgnoreCase)) {
parentTreeOwner->ContentShellAdded(GetDocShell(), is_primary);
}
}
void nsFrameLoader::RequestUpdatePosition(ErrorResult& aRv) {
if (auto* browserParent = GetBrowserParent()) {
nsresult rv = browserParent->UpdatePosition();
if (NS_FAILED(rv)) {
aRv.Throw(rv);
}
}
}
SessionStoreParent* nsFrameLoader::GetSessionStoreParent() {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
if (mSessionStoreChild) {
return static_cast<SessionStoreParent*>(
InProcessChild::ParentActorFor(mSessionStoreChild));
}
if (BrowserParent* browserParent = GetBrowserParent()) {
return static_cast<SessionStoreParent*>(
SingleManagedOrNull(browserParent->ManagedPSessionStoreParent()));
}
return nullptr;
}
already_AddRefed<Promise> nsFrameLoader::RequestTabStateFlush(
ErrorResult& aRv) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
Document* ownerDoc = GetOwnerDoc();
if (!ownerDoc) {
aRv.ThrowNotSupportedError("No owner document");
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(ownerDoc->GetOwnerGlobal(), aRv);
if (aRv.Failed()) {
return nullptr;
}
BrowsingContext* browsingContext = GetExtantBrowsingContext();
if (!browsingContext) {
promise->MaybeResolveWithUndefined();
return promise.forget();
}
SessionStoreParent* sessionStoreParent = GetSessionStoreParent();
if (!sessionStoreParent) {
promise->MaybeResolveWithUndefined();
return promise.forget();
}
sessionStoreParent->FlushAllSessionStoreChildren(
[promise]() { promise->MaybeResolveWithUndefined(); });
return promise.forget();
}
void nsFrameLoader::RequestFinalTabStateFlush() {
BrowsingContext* context = GetExtantBrowsingContext();
if (!context || !context->IsTop() || context->Canonical()->IsReplaced()) {
return;
}
RefPtr<CanonicalBrowsingContext> canonical = context->Canonical();
RefPtr<WindowGlobalParent> wgp = canonical->GetCurrentWindowGlobal();
RefPtr<Element> embedder = context->GetEmbedderElement();
RefPtr<SessionStoreParent> sessionStoreParent = GetSessionStoreParent();
if (!sessionStoreParent) {
canonical->ClearPermanentKey();
if (wgp) {
wgp->NotifySessionStoreUpdatesComplete(embedder);
}
return;
}
sessionStoreParent->FinalFlushAllSessionStoreChildren(
[canonical, wgp, embedder]() {
if (canonical) {
canonical->ClearPermanentKey();
}
if (wgp) {
wgp->NotifySessionStoreUpdatesComplete(embedder);
}
});
}
void nsFrameLoader::RequestEpochUpdate(uint32_t aEpoch) {
BrowsingContext* context = GetExtantBrowsingContext();
if (context) {
BrowsingContext* top = context->Top();
Unused << top->SetSessionStoreEpoch(aEpoch);
}
}
void nsFrameLoader::RequestSHistoryUpdate() {
if (mSessionStoreChild) {
mSessionStoreChild->UpdateSHistoryChanges();
return;
}
// If remote browsing (e10s), handle this with the BrowserParent.
if (auto* browserParent = GetBrowserParent()) {
Unused << browserParent->SendUpdateSHistory();
}
}
already_AddRefed<Promise> nsFrameLoader::PrintPreview(
nsIPrintSettings* aPrintSettings, BrowsingContext* aSourceBrowsingContext,
ErrorResult& aRv) {
auto* ownerDoc = GetOwnerDoc();
if (!ownerDoc) {
aRv.ThrowNotSupportedError("No owner document");
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(ownerDoc->GetOwnerGlobal(), aRv);
if (!promise) {
return nullptr;
}
#ifndef NS_PRINTING
promise->MaybeRejectWithNotSupportedError("Build does not support printing");
return promise.forget();
#else
auto resolve = [promise](PrintPreviewResultInfo aInfo) {
using Orientation = dom::PrintPreviewOrientation;
if (aInfo.sheetCount() > 0) {
PrintPreviewSuccessInfo info;
info.mSheetCount = aInfo.sheetCount();
info.mTotalPageCount = aInfo.totalPageCount();
info.mHasSelection = aInfo.hasSelection();
info.mHasSelfSelection = aInfo.hasSelfSelection();
info.mIsEmpty = aInfo.isEmpty();
if (aInfo.printLandscape()) {
info.mOrientation = aInfo.printLandscape().value()
? Orientation::Landscape
: Orientation::Portrait;
} else {
MOZ_ASSERT(info.mOrientation == Orientation::Unspecified);
}
if (aInfo.pageWidth()) {
info.mPageWidth = aInfo.pageWidth().value();
}
if (aInfo.pageHeight()) {
info.mPageHeight = aInfo.pageHeight().value();
}
promise->MaybeResolve(info);
} else {
promise->MaybeRejectWithUnknownError("Print preview failed");
}
};
if (auto* browserParent = GetBrowserParent()) {
nsCOMPtr<nsIPrintSettingsService> printSettingsSvc =
do_GetService("@mozilla.org/gfx/printsettings-service;1");
if (!printSettingsSvc) {
promise->MaybeRejectWithNotSupportedError("No nsIPrintSettingsService");
return promise.forget();
}
embedding::PrintData printData;
nsresult rv =
printSettingsSvc->SerializeToPrintData(aPrintSettings, &printData);
if (NS_WARN_IF(NS_FAILED(rv))) {
promise->MaybeReject(ErrorResult(rv));
return promise.forget();
}
browserParent->SendPrintPreview(printData, aSourceBrowsingContext)
->Then(
GetMainThreadSerialEventTarget(), __func__, std::move(resolve),
[promise](const mozilla::ipc::ResponseRejectReason) {
promise->MaybeRejectWithUnknownError("Print preview IPC failed");
});
return promise.forget();
}
RefPtr<nsGlobalWindowOuter> sourceWindow;
if (aSourceBrowsingContext) {
sourceWindow =
nsGlobalWindowOuter::Cast(aSourceBrowsingContext->GetDOMWindow());
} else {
nsDocShell* ourDocshell = GetExistingDocShell();
if (NS_WARN_IF(!ourDocshell)) {
promise->MaybeRejectWithNotSupportedError("No print preview docShell");
return promise.forget();
}
sourceWindow = nsGlobalWindowOuter::Cast(ourDocshell->GetWindow());
}
if (NS_WARN_IF(!sourceWindow)) {
promise->MaybeRejectWithNotSupportedError("No print preview source window");
return promise.forget();
}
nsCOMPtr<nsIDocShell> docShellToCloneInto = nullptr;
if (aSourceBrowsingContext) {
// We're going to call `Print()` below on a window that is not our own,
// which happens when we are creating a new print preview document instead
// of just applying a settings change to the existing PP document. In this
// case we need to explicitly pass our docShell as the docShell to clone
// into.
docShellToCloneInto = GetExistingDocShell();
if (NS_WARN_IF(!docShellToCloneInto)) {
promise->MaybeRejectWithNotSupportedError("No print preview docShell");
return promise.forget();
}
// We need to make sure we're displayed so that the view tree ends up right.
RefPtr<BrowsingContext> bc = docShellToCloneInto->GetBrowsingContext();
if (NS_WARN_IF(!bc)) {
promise->MaybeRejectWithNotSupportedError(
"No print preview browsing context");
return promise.forget();
}
RefPtr<Element> embedder = bc->GetEmbedderElement();
if (NS_WARN_IF(!embedder)) {
promise->MaybeRejectWithNotSupportedError(
"Trying to clone into a frameloader with no element?");
return promise.forget();
}
nsIFrame* frame = embedder->GetPrimaryFrame(FlushType::Frames);
if (NS_WARN_IF(!frame)) {
promise->MaybeRejectWithNotSupportedError("Frame is not being displayed");
return promise.forget();
}
}
// Unfortunately we can't pass `resolve` directly here because IPDL, for now,
// unfortunately generates slightly different parameter types for functions
// taking PrintPreviewResultInfo in PBrowserParent vs. PBrowserChild.
ErrorResult rv;
sourceWindow->Print(
aPrintSettings,
/* aRemotePrintJob = */ nullptr,
/* aListener = */ nullptr, docShellToCloneInto,
nsGlobalWindowOuter::IsPreview::Yes,
nsGlobalWindowOuter::IsForWindowDotPrint::No,
[resolve](const PrintPreviewResultInfo& aInfo) { resolve(aInfo); },
nullptr, rv);
if (NS_WARN_IF(rv.Failed())) {
promise->MaybeReject(std::move(rv));
}
return promise.forget();
#endif
}
void nsFrameLoader::ExitPrintPreview() {
#ifdef NS_PRINTING
if (auto* browserParent = GetBrowserParent()) {
Unused << browserParent->SendExitPrintPreview();
return;
}
if (NS_WARN_IF(!GetExistingDocShell())) {
return;
}
nsCOMPtr<nsIWebBrowserPrint> webBrowserPrint =
do_GetInterface(ToSupports(GetExistingDocShell()->GetWindow()));
if (NS_WARN_IF(!webBrowserPrint)) {
return;
}
webBrowserPrint->ExitPrintPreview();
#endif
}
already_AddRefed<nsIRemoteTab> nsFrameLoader::GetRemoteTab() {
if (!mRemoteBrowser) {
return nullptr;
}
if (auto* browserHost = mRemoteBrowser->AsBrowserHost()) {
return do_AddRef(browserHost);
}
return nullptr;
}
already_AddRefed<nsILoadContext> nsFrameLoader::GetLoadContext() {
return do_AddRef(GetBrowsingContext());
}
BrowsingContext* nsFrameLoader::GetBrowsingContext() {
if (!mInitialized) {
if (IsRemoteFrame()) {
Unused << EnsureRemoteBrowser();
} else if (mOwnerContent) {
Unused << MaybeCreateDocShell();
}
}
MOZ_ASSERT(mInitialized || mDestroyCalled);
return GetExtantBrowsingContext();
}
BrowsingContext* nsFrameLoader::GetExtantBrowsingContext() {
if (!mPendingBrowsingContext) {
// If mPendingBrowsingContext is null then the frame loader is being
// destroyed (nsFrameLoader::DestroyDocShell was called), so return null
// here in that case.
return nullptr;
}
if (!mInitialized || !mPendingBrowsingContext->EverAttached()) {
// Don't return the pending BrowsingContext until this nsFrameLoader has
// been initialized, and the BC was attached.
return nullptr;
}
return mPendingBrowsingContext;
}
void nsFrameLoader::StartPersistence(
BrowsingContext* aContext, nsIWebBrowserPersistDocumentReceiver* aRecv,
ErrorResult& aRv) {
MOZ_ASSERT(aRecv);
RefPtr<BrowsingContext> context = aContext ? aContext : GetBrowsingContext();
if (!context || !context->IsInSubtreeOf(GetBrowsingContext())) {
aRecv->OnError(NS_ERROR_NO_CONTENT);
return;
}
if (!context->GetDocShell() && XRE_IsParentProcess()) {
CanonicalBrowsingContext* canonical =
CanonicalBrowsingContext::Cast(context);
if (!canonical->GetCurrentWindowGlobal()) {
aRecv->OnError(NS_ERROR_NO_CONTENT);
return;
}
RefPtr<BrowserParent> browserParent =
canonical->GetCurrentWindowGlobal()->GetBrowserParent();
browserParent->StartPersistence(canonical, aRecv, aRv);
return;
}
nsCOMPtr<Document> foundDoc = context->GetDocument();
if (!foundDoc) {
aRecv->OnError(NS_ERROR_NO_CONTENT);
} else {
nsCOMPtr<nsIWebBrowserPersistDocument> pdoc =
new mozilla::WebBrowserPersistLocalDocument(foundDoc);
aRecv->OnDocumentReady(pdoc);
}
}
void nsFrameLoader::MaybeUpdatePrimaryBrowserParent(
BrowserParentChange aChange) {
if (!mOwnerContent || !mRemoteBrowser) {
return;
}
RefPtr<BrowserHost> browserHost = mRemoteBrowser->AsBrowserHost();
if (!browserHost) {
return;
}
nsCOMPtr<nsIDocShell> docShell = mOwnerContent->OwnerDoc()->GetDocShell();
if (!docShell) {
return;
}
BrowsingContext* browsingContext = docShell->GetBrowsingContext();
if (!browsingContext->IsChrome()) {
return;
}
nsCOMPtr<nsIDocShellTreeOwner> parentTreeOwner;
docShell->GetTreeOwner(getter_AddRefs(parentTreeOwner));
if (!parentTreeOwner) {
return;
}
if (!mObservingOwnerContent) {
mOwnerContent->AddMutationObserver(this);
mObservingOwnerContent = true;
}
parentTreeOwner->RemoteTabRemoved(browserHost);
if (aChange == eBrowserParentChanged) {
bool isPrimary = mOwnerContent->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::primary, nsGkAtoms::_true, eIgnoreCase);
parentTreeOwner->RemoteTabAdded(browserHost, isPrimary);
}
}
nsresult nsFrameLoader::GetNewTabContext(MutableTabContext* aTabContext,
nsIURI* aURI) {
nsCOMPtr<nsIDocShell> docShell = mOwnerContent->OwnerDoc()->GetDocShell();
nsCOMPtr<nsILoadContext> parentContext = do_QueryInterface(docShell);
NS_ENSURE_STATE(parentContext);
MOZ_ASSERT(mPendingBrowsingContext->EverAttached());
uint64_t chromeOuterWindowID = 0;
nsCOMPtr<nsPIWindowRoot> root =
nsContentUtils::GetWindowRoot(mOwnerContent->OwnerDoc());
if (root) {
nsPIDOMWindowOuter* outerWin = root->GetWindow();
if (outerWin) {
chromeOuterWindowID = outerWin->WindowID();
}
}
uint32_t maxTouchPoints = BrowserParent::GetMaxTouchPoints(mOwnerContent);
bool tabContextUpdated =
aTabContext->SetTabContext(chromeOuterWindowID, maxTouchPoints);
NS_ENSURE_STATE(tabContextUpdated);
return NS_OK;
}
nsresult nsFrameLoader::PopulateOriginContextIdsFromAttributes(
OriginAttributes& aAttr) {
// Only XUL are allowed to set context IDs
uint32_t namespaceID = mOwnerContent->GetNameSpaceID();
if (namespaceID != kNameSpaceID_XUL) {
return NS_OK;
}
nsAutoString attributeValue;
if (aAttr.mUserContextId ==
nsIScriptSecurityManager::DEFAULT_USER_CONTEXT_ID &&
mOwnerContent->GetAttr(nsGkAtoms::usercontextid, attributeValue) &&
!attributeValue.IsEmpty()) {
nsresult rv;
aAttr.mUserContextId = attributeValue.ToInteger(&rv);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aAttr.mGeckoViewSessionContextId.IsEmpty() &&
mOwnerContent->GetAttr(nsGkAtoms::geckoViewSessionContextId,
attributeValue) &&
!attributeValue.IsEmpty()) {
// XXX: Should we check the format from `GeckoViewNavigation.sys.mjs` here?
aAttr.mGeckoViewSessionContextId = attributeValue;
}
return NS_OK;
}
ProcessMessageManager* nsFrameLoader::GetProcessMessageManager() const {
if (auto* browserParent = GetBrowserParent()) {
return browserParent->Manager()->GetMessageManager();
}
return nullptr;
};
JSObject* nsFrameLoader::WrapObject(JSContext* cx,
JS::Handle<JSObject*> aGivenProto) {
JS::Rooted<JSObject*> result(cx);
FrameLoader_Binding::Wrap(cx, this, this, aGivenProto, &result);
return result;
}
void nsFrameLoader::SetWillChangeProcess() {
mWillChangeProcess = true;
if (IsRemoteFrame()) {
if (auto* browserParent = GetBrowserParent()) {
if (auto* bc = CanonicalBrowsingContext::Cast(mPendingBrowsingContext);
bc && bc->EverAttached()) {
bc->StartUnloadingHost(browserParent->Manager()->ChildID());
bc->SetCurrentBrowserParent(nullptr);
}
// OOP Browser - Go directly over Browser Parent
Unused << browserParent->SendWillChangeProcess();
} else if (auto* browserBridgeChild = GetBrowserBridgeChild()) {
// OOP IFrame - Through Browser Bridge Parent, set on browser child
Unused << browserBridgeChild->SendWillChangeProcess();
}
return;
}
// In process
RefPtr<nsDocShell> docshell = GetDocShell();
MOZ_ASSERT(docshell);
docshell->SetWillChangeProcess();
}
static mozilla::Result<bool, nsresult> BuildIDMismatchMemoryAndDisk() {
nsresult rv;
nsCOMPtr<nsIFile> file;
if (const char* forceMismatch = PR_GetEnv("MOZ_FORCE_BUILDID_MISMATCH")) {
if (forceMismatch[0] == '1') {
NS_WARNING("Forcing a buildid mismatch");
return true;
}
}
#if defined(ANDROID)
// Android packages on installation will stop existing instance, so we
// cannot run into this problem.
return false;
#endif // defined(ANDROID)
#if defined(XP_WIN)
{
// Windows Store packages cannot run into this problem.
nsCOMPtr<nsIPropertyBag2> infoService =
do_GetService("@mozilla.org/system-info;1");
MOZ_ASSERT(infoService, "Could not find a system info service");
bool isMSIX;
nsresult rv = infoService->GetPropertyAsBool(u"isPackagedApp"_ns, &isMSIX);
if (NS_SUCCEEDED(rv)) {
if (isMSIX) {
return false;
}
}
}
#endif
rv = NS_GetSpecialDirectory(NS_GRE_BIN_DIR, getter_AddRefs(file));
MOZ_TRY(rv);
rv = file->Append(XUL_DLL u""_ns);
MOZ_TRY(rv);
nsAutoString xul;
rv = file->GetPath(xul);
MOZ_TRY(rv);
nsCString installedBuildID;
nsCString section_name(MOZ_BUILDID_SECTION_NAME);
rv = read_toolkit_buildid_from_file(&xul, §ion_name, &installedBuildID);
MOZ_TRY(rv);
return (installedBuildID != PlatformBuildID());
}
void nsFrameLoader::MaybeNotifyCrashed(BrowsingContext* aBrowsingContext,
ContentParentId aChildID,
mozilla::ipc::MessageChannel* aChannel) {
if (mTabProcessCrashFired) {
return;
}
if (mPendingBrowsingContext == aBrowsingContext) {
mTabProcessCrashFired = true;
}
// Fire the crashed observer notification.
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
if (!os) {
return;
}
os->NotifyObservers(ToSupports(this), "oop-frameloader-crashed", nullptr);
// Check our owner element still references us. If it's moved, on, events
// don't need to be fired.
RefPtr<nsFrameLoaderOwner> owner = do_QueryObject(mOwnerContent);
if (!owner) {
return;
}
RefPtr<nsFrameLoader> currentFrameLoader = owner->GetFrameLoader();
if (currentFrameLoader != this) {
return;
}
#if defined(MOZ_TELEMETRY_REPORTING)
bool sendTelemetryFalsePositive = false, sendTelemetryTrueMismatch = false;
static bool haveSentTelemetryFalsePositive = false,
haveSentTelemetryTrueMismatch = false;
#endif // defined(MOZ_TELEMETRY_REPORTING)
// Fire the actual crashed event.
nsString eventName;
if (aChannel && !aChannel->DoBuildIDsMatch()) {
auto changedOrError = BuildIDMismatchMemoryAndDisk();
if (changedOrError.isErr()) {
NS_WARNING("Error while checking buildid mismatch");
eventName = u"oop-browser-crashed"_ns;
} else {
bool aChanged = changedOrError.unwrap();
if (aChanged) {
NS_WARNING("True build ID mismatch");
eventName = u"oop-browser-buildid-mismatch"_ns;
#if defined(MOZ_TELEMETRY_REPORTING)
sendTelemetryTrueMismatch = true;
#endif // defined(MOZ_TELEMETRY_REPORTING)
} else {
NS_WARNING("build ID mismatch false alarm");
eventName = u"oop-browser-crashed"_ns;
#if defined(MOZ_TELEMETRY_REPORTING)
sendTelemetryFalsePositive = true;
#endif // defined(MOZ_TELEMETRY_REPORTING)
}
}
} else {
NS_WARNING("No build ID mismatch");
eventName = u"oop-browser-crashed"_ns;
}
#if defined(MOZ_TELEMETRY_REPORTING)
if (sendTelemetryFalsePositive && !haveSentTelemetryFalsePositive) {
glean::dom_contentprocess::build_id_mismatch_false_positive.Add(1);
haveSentTelemetryFalsePositive = true;
}
if (sendTelemetryTrueMismatch && !haveSentTelemetryTrueMismatch) {
glean::dom_contentprocess::build_id_mismatch.Add(1);
haveSentTelemetryTrueMismatch = true;
}
#endif // defined(MOZ_TELEMETRY_REPORTING)
FrameCrashedEventInit init;
init.mBubbles = true;
init.mCancelable = true;
if (aBrowsingContext) {
init.mBrowsingContextId = aBrowsingContext->Id();
init.mIsTopFrame = aBrowsingContext->IsTop();
init.mChildID = aChildID;
}
RefPtr<FrameCrashedEvent> event = FrameCrashedEvent::Constructor(
mOwnerContent->OwnerDoc(), eventName, init);
event->SetTrusted(true);
RefPtr<Element> ownerContent = mOwnerContent;
EventDispatcher::DispatchDOMEvent(ownerContent, nullptr, event, nullptr,
nullptr);
}
bool nsFrameLoader::EnsureBrowsingContextAttached() {
nsresult rv;
Document* parentDoc = mOwnerContent->OwnerDoc();
MOZ_ASSERT(parentDoc);
BrowsingContext* parentContext = parentDoc->GetBrowsingContext();
MOZ_ASSERT(parentContext);
// Inherit the `use` flags from our parent BrowsingContext.
bool usePrivateBrowsing = parentContext->UsePrivateBrowsing();
bool useRemoteSubframes = parentContext->UseRemoteSubframes();
bool useRemoteTabs = parentContext->UseRemoteTabs();
// Determine the exact OriginAttributes which should be used for our
// BrowsingContext. This will be used to initialize OriginAttributes if the
// BrowsingContext has not already been created.
OriginAttributes attrs;
if (mPendingBrowsingContext->IsContent()) {
if (mPendingBrowsingContext->GetParent()) {
MOZ_ASSERT(mPendingBrowsingContext->GetParent() == parentContext);
parentContext->GetOriginAttributes(attrs);
}
// Inherit the `mFirstPartyDomain` flag from our parent document's result
// principal, if it was set.
if (parentContext->IsContent() &&
!parentDoc->NodePrincipal()->IsSystemPrincipal()) {
OriginAttributes docAttrs =
parentDoc->NodePrincipal()->OriginAttributesRef();
// We only want to inherit firstPartyDomain here, other attributes should
// be constant.
MOZ_ASSERT(attrs.EqualsIgnoringFPD(docAttrs));
attrs.mFirstPartyDomain = docAttrs.mFirstPartyDomain;
}
// Inherit the PrivateBrowsing flag across content/chrome boundaries.
attrs.SyncAttributesWithPrivateBrowsing(usePrivateBrowsing);
// A <browser> element may have overridden userContextId or
// geckoViewUserContextId.
rv = PopulateOriginContextIdsFromAttributes(attrs);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
}
// If we've already been attached, return.
if (mPendingBrowsingContext->EverAttached()) {
MOZ_DIAGNOSTIC_ASSERT(mPendingBrowsingContext->UsePrivateBrowsing() ==
usePrivateBrowsing);
MOZ_DIAGNOSTIC_ASSERT(mPendingBrowsingContext->UseRemoteTabs() ==
useRemoteTabs);
MOZ_DIAGNOSTIC_ASSERT(mPendingBrowsingContext->UseRemoteSubframes() ==
useRemoteSubframes);
// Don't assert that our OriginAttributes match, as we could have different
// OriginAttributes in the case where we were opened using window.open.
return true;
}
// Initialize non-synced OriginAttributes and related fields.
rv = mPendingBrowsingContext->SetOriginAttributes(attrs);
NS_ENSURE_SUCCESS(rv, false);
rv = mPendingBrowsingContext->SetUsePrivateBrowsing(usePrivateBrowsing);
NS_ENSURE_SUCCESS(rv, false);
rv = mPendingBrowsingContext->SetRemoteTabs(useRemoteTabs);
NS_ENSURE_SUCCESS(rv, false);
rv = mPendingBrowsingContext->SetRemoteSubframes(useRemoteSubframes);
NS_ENSURE_SUCCESS(rv, false);
// Finish attaching.
mPendingBrowsingContext->EnsureAttached();
return true;
}
void nsFrameLoader::InvokeBrowsingContextReadyCallback() {
if (mOpenWindowInfo) {
if (RefPtr<nsIBrowsingContextReadyCallback> callback =
mOpenWindowInfo->BrowsingContextReadyCallback()) {
callback->BrowsingContextReady(mPendingBrowsingContext);
}
}
}