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Diffstat (limited to '')
| -rw-r--r-- | dom/base/nsFrameLoader.cpp | 3921 |
1 files changed, 3921 insertions, 0 deletions
diff --git a/dom/base/nsFrameLoader.cpp b/dom/base/nsFrameLoader.cpp new file mode 100644 index 0000000000..cc2344af77 --- /dev/null +++ b/dom/base/nsFrameLoader.cpp @@ -0,0 +1,3921 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * 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 "nsIContentViewer.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 "nsIScrollableFrame.h" +#include "nsSubDocumentFrame.h" +#include "nsError.h" +#include "nsIAppWindow.h" +#include "nsIMozBrowserFrame.h" +#include "nsIScriptError.h" +#include "nsGlobalWindow.h" +#include "nsHTMLDocument.h" +#include "nsPIWindowRoot.h" +#include "nsLayoutUtils.h" +#include "nsMappedAttributes.h" +#include "nsView.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 "nsIDOMChromeWindow.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/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 "nsXULPopupManager.h" + +#ifdef NS_PRINTING +# include "nsIWebBrowserPrint.h" +#endif + +#if defined(MOZ_TELEMETRY_REPORTING) +# include "mozilla/Telemetry.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&)>; + +// Bug 8065: Limit content frame depth to some reasonable level. This +// 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, +// we'd need to re-institute a fixed version of bug 98158. +#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), + mRemoteBrowserShown(false), + mIsRemoteFrame(aIsRemoteFrame), + mWillChangeProcess(false), + mObservingOwnerContent(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(kNameSpaceID_None, nsGkAtoms::id, aFrameName); + } else { + aOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::name, aFrameName); + // XXX if no NAME then use ID, after a transition period this will be + // changed so that XUL only uses ID too (bug 254284). + if (aFrameName.IsEmpty() && namespaceID == kNameSpaceID_XUL) { + aOwnerContent->GetAttr(kNameSpaceID_None, 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 we have a (deprecated) mozbrowser element, we want to start a new + // BrowsingContext tree regardless of whether the parent is chrome or content. + nsCOMPtr<nsIMozBrowserFrame> mozbrowser = aOwner->GetAsMozBrowserFrame(); + if (mozbrowser && mozbrowser->GetReallyIsBrowser()) { + return true; + } + + 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)) { + // Create toplevel context without a parent & as Type::Content. + return BrowsingContext::CreateDetached( + nullptr, opener, aSpecificGroup, frameName, + BrowsingContext::Type::Content, false); + } + + 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(), false, + !aNetworkCreated); +} + +static bool InitialLoadIsRemote(Element* aOwner) { + if (PR_GetEnv("MOZ_DISABLE_OOP_TABS") || + Preferences::GetBool("dom.ipc.tabs.disabled", false)) { + return false; + } + + // 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; + } + + // If we're an <iframe mozbrowser> and we don't have a "remote" attribute, + // fall back to the default. + nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(aOwner); + bool isMozBrowserFrame = browserFrame && browserFrame->GetReallyIsBrowser(); + if (isMozBrowserFrame && + !aOwner->HasAttr(kNameSpaceID_None, nsGkAtoms::remote)) { + return Preferences::GetBool("dom.ipc.browser_frames.oop_by_default", false); + } + + // Otherwise, we're remote if we have "remote=true" and we're either a + // browser frame or a XUL element. + return (isMozBrowserFrame || 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(kNameSpaceID_None, 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) { + if (NS_WARN_IF(!mOwnerContent)) { + return; + } + + nsAutoString src; + nsCOMPtr<nsIPrincipal> principal; + nsCOMPtr<nsIContentSecurityPolicy> csp; + + bool isSrcdoc = mOwnerContent->IsHTMLElement(nsGkAtoms::iframe) && + mOwnerContent->HasAttr(kNameSpaceID_None, 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; + } + + nsIURI* base_uri = mOwnerContent->GetBaseURI(); + auto encoding = doc->GetDocumentCharacterSet(); + + nsCOMPtr<nsIURI> uri; + nsresult rv = NS_NewURI(getter_AddRefs(uri), src, encoding, base_uri); + + // 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, base_uri); + } + + if (NS_SUCCEEDED(rv)) { + rv = LoadURI(uri, principal, csp, aOriginalSrc); + } + + 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) { + 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; + + 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; + 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); + + // 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(kNameSpaceID_None, nsGkAtoms::srcdoc, srcdoc); + + if (isSrcdoc) { + loadState->SetSrcdocData(srcdoc); + loadState->SetBaseURI(mOwnerContent->GetBaseURI()); + } + + auto referrerInfo = MakeRefPtr<ReferrerInfo>(*mOwnerContent); + loadState->SetReferrerInfo(referrerInfo); + + loadState->SetIsFromProcessingFrameAttributes(); + + // Default flags: + int32_t flags = nsIWebNavigation::LOAD_FLAGS_NONE; + + // Flags for browser frame: + if (OwnerIsMozBrowserFrame()) { + flags = nsIWebNavigation::LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP | + nsIWebNavigation::LOAD_FLAGS_DISALLOW_INHERIT_PRINCIPAL; + } + loadState->SetLoadFlags(flags); + + loadState->SetFirstParty(false); + + // 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(ScreenIntSize(0, 0)); + } + + 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; + + // Kick off the load... + bool tmpState = mNeedsAsyncDestroy; + mNeedsAsyncDestroy = true; + + rv = GetDocShell()->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) { + nsCOMPtr<nsIMozBrowserFrame> mozbrowser = + aOwnerContent->GetAsMozBrowserFrame(); + if (mozbrowser) { + mozbrowser->GetMozbrowser(&isContent); + } + } + + 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* frame) { + if (mInShow) { + return false; + } + mInShow = true; + + auto resetInShow = mozilla::MakeScopeExit([&] { mInShow = false; }); + + ScreenIntSize size = frame->GetSubdocumentSize(); + if (IsRemoteFrame()) { + // FIXME(bug 1588791): For fission iframes we need to pass down the + // scrollbar preferences. + return ShowRemoteFrame(size, frame); + } + + 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)); + if (PresShell* presShell = ds->GetPresShell()) { + // Ensure root scroll frame is reflowed in case margins have changed + if (marginsChanged) { + if (nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame()) { + presShell->FrameNeedsReflow(rootScrollFrame, IntrinsicDirty::None, + NS_FRAME_IS_DIRTY); + } + } + return true; + } + + nsView* view = frame->EnsureInnerView(); + if (!view) return false; + + RefPtr<nsDocShell> baseWindow = GetDocShell(); + baseWindow->InitWindow(nullptr, 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. See + // https://bugzilla.mozilla.org/show_bug.cgi?id=284245 + 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 (cur->IsHTMLElement(nsGkAtoms::body)) { + static_cast<HTMLBodyElement*>(cur)->ClearMappedServoStyle(); + } + } + } + + // Trigger a restyle if there's a prescontext + // FIXME: This could do something much less expensive. + if (nsPresContext* presContext = docShell->GetPresContext()) { + // rebuild, because now the same nsMappedAttributes* will produce + // a different style + presContext->RebuildAllStyleData(nsChangeHint(0), + RestyleHint::RestyleSubtree()); + } +} + +bool nsFrameLoader::ShowRemoteFrame(const ScreenIntSize& size, + 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; + } + + // FIXME/bug 589337: Show()/Hide() is pretty expensive for + // 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; + OwnerShowInfo info(size, GetScrollbarPreference(mOwnerContent), sizeMode); + if (!mRemoteBrowser->Show(info)) { + return false; + } + mRemoteBrowserShown = true; + + // This notification doesn't apply to fission, apparently. + if (!GetBrowserBridgeChild()) { + if (nsCOMPtr<nsIObserverService> os = services::GetObserverService()) { + os->NotifyObservers(ToSupports(this), "remote-browser-shown", nullptr); + } + ProcessPriorityManager::RemoteBrowserFrameShown(this); + } + } else { + nsIntRect dimensions; + NS_ENSURE_SUCCESS(GetWindowDimensions(dimensions), false); + + // Don't show remote iframe if we are waiting for the completion of reflow. + if (!aFrame || !(aFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)) { + mRemoteBrowser->UpdateDimensions(dimensions, size); + } + } + + return true; +} + +void nsFrameLoader::Hide() { + if (mHideCalled) { + return; + } + if (mInShow) { + mHideCalled = true; + return; + } + + if (!GetDocShell()) { + return; + } + + nsCOMPtr<nsIContentViewer> contentViewer; + GetDocShell()->GetContentViewer(getter_AddRefs(contentViewer)); + if (contentViewer) contentViewer->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->GetStateBits() & 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(kNameSpaceID_None, nsGkAtoms::disablehistory); + bool otherHasHistory = + aOther->mIsTopLevelContent && + otherContent->IsXULElement(nsGkAtoms::browser) && + !otherContent->HasAttr(kNameSpaceID_None, 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; + } + + // Destroy browser frame scripts for content leaving a frame with browser API + if (OwnerIsMozBrowserFrame() && !aOther->OwnerIsMozBrowserFrame()) { + DestroyBrowserFrameScripts(); + } + if (!OwnerIsMozBrowserFrame() && aOther->OwnerIsMozBrowserFrame()) { + aOther->DestroyBrowserFrameScripts(); + } + + 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->EvictAllContentViewers(); + } + } + }; + 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 + // frameloaders? Currently they leak very easily, bug 1697918. + + // 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(); + + // Initialize browser API if needed now that owner content has changed. + InitializeBrowserAPI(); + aOther->InitializeBrowserAPI(); + + 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()); + 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(kNameSpaceID_None, nsGkAtoms::srcdoc); + bool otherHasSrcdoc = + otherContent->IsHTMLElement(nsGkAtoms::iframe) && + otherContent->HasAttr(kNameSpaceID_None, 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() || + (OwnerIsMozBrowserFrame() && + ourContent->HasAttr(nsGkAtoms::allowfullscreen)); + bool otherFullscreenAllowed = + otherContent->IsXULElement() || + (aOther->OwnerIsMozBrowserFrame() && + otherContent->HasAttr(nsGkAtoms::allowfullscreen)); + 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; + } + + // Destroy browser frame scripts for content leaving a frame with browser API + if (OwnerIsMozBrowserFrame() && !aOther->OwnerIsMozBrowserFrame()) { + DestroyBrowserFrameScripts(); + } + if (!OwnerIsMozBrowserFrame() && aOther->OwnerIsMozBrowserFrame()) { + aOther->DestroyBrowserFrameScripts(); + } + + // 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->EvictLocalContentViewers(); + } + if (otherHistory) { + otherHistory->EvictLocalContentViewers(); + } + + 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 + // backing scale factor may have changed. (Bug 822266) + ourFrame->PresShell()->BackingScaleFactorChanged(); + otherFrame->PresShell()->BackingScaleFactorChanged(); + + // Initialize browser API if needed now that owner content has changed + InitializeBrowserAPI(); + aOther->InitializeBrowserAPI(); + + 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); + 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. + // XXX(farre): This probably needs to update the cache. See bug 1698497. + 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()); + } +} + +bool nsFrameLoader::OwnerIsMozBrowserFrame() { + nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(mOwnerContent); + return browserFrame ? browserFrame->GetReallyIsBrowser() : false; +} + +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 + // partially unloaded document (see Bug 1305237 comment 127). + if (!doc->IsStaticDocument() && + (!doc->GetWindow() || !mOwnerContent->IsInComposedDoc())) { + return NS_ERROR_UNEXPECTED; + } + + if (!doc->IsActive()) { + // Don't allow subframe loads in non-active documents. + // (See bug 610571 comment 5.) + 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. + // (see bug 1652085, bug 1656854) + 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)) { + // Do not call Destroy() here. See bug 472312. + 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()) { + // Do not call Destroy() here. See bug 472312. + 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(kNameSpaceID_None, 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())); + + if (OwnerIsMozBrowserFrame()) { + // For inproc frames, set the docshell properties. + nsAutoString name; + if (mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::name, name)) { + docShell->SetName(name); + } + } + + ReallyLoadFrameScripts(); + InitializeBrowserAPI(); + + // 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 + // the initial about:blank document being created eagerly. See bug 1471327 + // 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(kNameSpaceID_None, nsGkAtoms::data, aURI); + } else { + mOwnerContent->GetAttr(kNameSpaceID_None, 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()); + MOZ_ASSERT(parentBC, "How can we not have a parent here?"); + + if (!parentBC->IsContent()) { + return NS_OK; + } + + // Bug 8065: Don't exceed some maximum depth in content frames + // (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(nsIntRect& 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)); + treeOwnerAsWin->GetPosition(&aRect.x, &aRect.y); + treeOwnerAsWin->GetSize(&aRect.width, &aRect.height); + return NS_OK; +} + +nsresult nsFrameLoader::UpdatePositionAndSize(nsSubDocumentFrame* aIFrame) { + if (IsRemoteFrame()) { + if (mRemoteBrowser) { + ScreenIntSize size = aIFrame->GetSubdocumentSize(); + // If we were not able to show remote frame before, we should probably + // retry now to send correct showInfo. + if (!mRemoteBrowserShown) { + ShowRemoteFrame(size, aIFrame); + } + nsIntRect dimensions; + NS_ENSURE_SUCCESS(GetWindowDimensions(dimensions), NS_ERROR_FAILURE); + mLazySize = size; + mRemoteBrowser->UpdateDimensions(dimensions, size); + } + return NS_OK; + } + UpdateBaseWindowPositionAndSize(aIFrame); + return NS_OK; +} + +void nsFrameLoader::SendIsUnderHiddenEmbedderElement( + bool aIsUnderHiddenEmbedderElement) { + MOZ_ASSERT(IsRemoteFrame()); + + if (auto* browserBridgeChild = GetBrowserBridgeChild()) { + browserBridgeChild->SetIsUnderHiddenEmbedderElement( + aIsUnderHiddenEmbedderElement); + } +} + +void nsFrameLoader::PropagateIsUnderHiddenEmbedderElement( + bool aIsUnderHiddenEmbedderElement) { + bool isUnderHiddenEmbedderElement = true; + if (Document* ownerDoc = GetOwnerDoc()) { + if (PresShell* presShell = ownerDoc->GetPresShell()) { + isUnderHiddenEmbedderElement = presShell->IsUnderHiddenEmbedderElement(); + } + } + + isUnderHiddenEmbedderElement |= aIsUnderHiddenEmbedderElement; + if (nsDocShell* docShell = GetExistingDocShell()) { + if (PresShell* presShell = docShell->GetPresShell()) { + presShell->SetIsUnderHiddenEmbedderElement(isUnderHiddenEmbedderElement); + } + } else { + SendIsUnderHiddenEmbedderElement(isUnderHiddenEmbedderElement); + } +} + +void nsFrameLoader::UpdateRemoteStyle( + mozilla::StyleImageRendering aImageRendering) { + MOZ_DIAGNOSTIC_ASSERT(IsRemoteFrame()); + + if (auto* browserBridgeChild = GetBrowserBridgeChild()) { + browserBridgeChild->SendUpdateRemoteStyle(aImageRendering); + } +} + +void nsFrameLoader::UpdateBaseWindowPositionAndSize( + nsSubDocumentFrame* aIFrame) { + nsCOMPtr<nsIBaseWindow> baseWindow = GetDocShell(IgnoreErrors()); + + // resize the sub document + if (baseWindow) { + int32_t x = 0; + int32_t y = 0; + + AutoWeakFrame weakFrame(aIFrame); + + baseWindow->GetPosition(&x, &y); + + if (!weakFrame.IsAlive()) { + // GetPosition() killed us + return; + } + + ScreenIntSize size = aIFrame->GetSubdocumentSize(); + mLazySize = size; + + baseWindow->SetPositionAndSize(x, y, size.width, size.height, + nsIBaseWindow::eDelayResize); + } +} + +uint32_t nsFrameLoader::LazyWidth() const { + uint32_t lazyWidth = mLazySize.width; + + nsIFrame* frame = GetPrimaryFrameOfOwningContent(); + if (frame) { + lazyWidth = frame->PresContext()->DevPixelsToIntCSSPixels(lazyWidth); + } + + return lazyWidth; +} + +uint32_t nsFrameLoader::LazyHeight() const { + uint32_t lazyHeight = mLazySize.height; + + nsIFrame* frame = GetPrimaryFrameOfOwningContent(); + if (frame) { + 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 + // https://www.w3.org/Bugs/Public/show_bug.cgi?id=26365#c0 + 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. + // + // FIXME: Ideally this should be unconditional, but we skip if for <iframe + // mozbrowser> because the old RDM ui depends on current behavior, and the + // mozbrowser frame code is scheduled for deletion, see bug 1574886. + if (!OwnerIsMozBrowserFrame() && !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. + // (See bug 610571 comment 5.) + 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(); + } + + // <iframe mozbrowser> gets to skip these checks. + // 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 (!OwnerIsMozBrowserFrame() && !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, + "chrome://mochitests/content/chrome/"_ns)) { + 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)); + nsCOMPtr<nsPIDOMWindowOuter> rootWin = rootItem->GetWindow(); + nsCOMPtr<nsIDOMChromeWindow> rootChromeWin = do_QueryInterface(rootWin); + + if (rootChromeWin) { + nsCOMPtr<nsIBrowserDOMWindow> browserDOMWin; + rootChromeWin->GetBrowserDOMWindow(getter_AddRefs(browserDOMWin)); + browserParent->SetBrowserDOMWindow(browserDOMWin); + } + + // 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(kNameSpaceID_None, 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(); + InitializeBrowserAPI(); + + return true; +} + +bool nsFrameLoader::TryRemoteBrowser() { + // Try to create the internal remote browser. + if (TryRemoteBrowserInternal()) { + return 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; +} + +bool nsFrameLoader::IsRemoteFrame() { + if (mIsRemoteFrame) { + MOZ_ASSERT(!GetDocShell(), "Found a remote frame with a DocShell"); + return true; + } + return false; +} + +RemoteBrowser* nsFrameLoader::GetRemoteBrowser() const { + return mRemoteBrowser; +} + +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<nsIContentViewer> viewer; + docShell->GetContentViewer(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) + : nsSameProcessAsyncMessageBase(), + mozilla::Runnable("nsAsyncMessageToChild"), + mFrameLoader(aFrameLoader) {} + + NS_IMETHOD Run() override { + InProcessBrowserChildMessageManager* browserChild = + mFrameLoader->mChildMessageManager; + // Since bug 1126089, messages can arrive even when the docShell is + // 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 && !OwnerIsMozBrowserFrame() && !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(kNameSpaceID_None, + 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 (StaticPrefs::browser_sessionstore_platform_collection_AtStartup()) { + 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); +} + +void nsFrameLoader::SetDetachedSubdocFrame(nsIFrame* aDetachedFrame, + Document* aContainerDoc) { + mDetachedSubdocFrame = aDetachedFrame; + mContainerDocWhileDetached = aContainerDoc; +} + +nsIFrame* nsFrameLoader::GetDetachedSubdocFrame( + Document** aContainerDoc) const { + NS_IF_ADDREF(*aContainerDoc = mContainerDocWhileDetached); + 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); + } + 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); }, 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::LoadContext() { + return do_AddRef(GetBrowsingContext()); +} + +BrowsingContext* nsFrameLoader::GetBrowsingContext() { + if (!mInitialized) { + if (IsRemoteFrame()) { + Unused << EnsureRemoteBrowser(); + } else if (mOwnerContent) { + Unused << MaybeCreateDocShell(); + } + } + MOZ_ASSERT(mInitialized); + 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::InitializeBrowserAPI() { + if (!OwnerIsMozBrowserFrame()) { + return; + } + + nsresult rv = EnsureMessageManager(); + if (NS_WARN_IF(NS_FAILED(rv))) { + return; + } + mMessageManager->LoadFrameScript( + u"chrome://global/content/BrowserElementChild.js"_ns, + /* allowDelayedLoad = */ true, + /* aRunInGlobalScope */ true, IgnoreErrors()); + + nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(mOwnerContent); + if (browserFrame) { + browserFrame->InitializeBrowserAPI(); + } +} + +void nsFrameLoader::DestroyBrowserFrameScripts() { + if (!OwnerIsMozBrowserFrame()) { + return; + } + nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(mOwnerContent); + if (browserFrame) { + browserFrame->DestroyBrowserFrameScripts(); + } +} + +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 or mozbrowser frames are allowed to set context IDs + uint32_t namespaceID = mOwnerContent->GetNameSpaceID(); + if (namespaceID != kNameSpaceID_XUL && !OwnerIsMozBrowserFrame()) { + return NS_OK; + } + + nsAutoString attributeValue; + if (aAttr.mUserContextId == + nsIScriptSecurityManager::DEFAULT_USER_CONTEXT_ID && + mOwnerContent->GetAttr(kNameSpaceID_None, nsGkAtoms::usercontextid, + attributeValue) && + !attributeValue.IsEmpty()) { + nsresult rv; + aAttr.mUserContextId = attributeValue.ToInteger(&rv); + NS_ENSURE_SUCCESS(rv, rv); + } + + if (aAttr.mGeckoViewSessionContextId.IsEmpty() && + mOwnerContent->GetAttr(kNameSpaceID_None, + nsGkAtoms::geckoViewSessionContextId, + attributeValue) && + !attributeValue.IsEmpty()) { + // XXX: Should we check the format from `GeckoViewNavigation.jsm` 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> DidBuildIDChange() { + nsresult rv; + nsCOMPtr<nsIFile> file; + + rv = NS_GetSpecialDirectory(NS_GRE_DIR, getter_AddRefs(file)); + MOZ_TRY(rv); + + rv = file->AppendNative("platform.ini"_ns); + MOZ_TRY(rv); + + nsCOMPtr<nsIINIParserFactory> iniFactory = + do_GetService("@mozilla.org/xpcom/ini-parser-factory;1", &rv); + MOZ_TRY(rv); + + nsCOMPtr<nsIINIParser> parser; + rv = iniFactory->CreateINIParser(file, getter_AddRefs(parser)); + MOZ_TRY(rv); + + nsAutoCString installedBuildID; + rv = parser->GetString("Build"_ns, "BuildID"_ns, installedBuildID); + MOZ_TRY(rv); + + nsDependentCString runningBuildID(PlatformBuildID()); + return (installedBuildID != runningBuildID); +} + +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 sendTelemetry = false; +#endif // defined(MOZ_TELEMETRY_REPORTING) + + // Fire the actual crashed event. + nsString eventName; + if (aChannel && !aChannel->DoBuildIDsMatch()) { + auto changedOrError = DidBuildIDChange(); + if (changedOrError.isErr()) { + NS_WARNING("Error while checking buildid mismatch"); + eventName = u"oop-browser-buildid-mismatch"_ns; + } else { + bool aChanged = changedOrError.unwrap(); + if (aChanged) { + NS_WARNING("True build ID mismatch"); + eventName = u"oop-browser-buildid-mismatch"_ns; + } else { + NS_WARNING("build ID mismatch false alarm"); + eventName = u"oop-browser-crashed"_ns; +#if defined(MOZ_TELEMETRY_REPORTING) + sendTelemetry = 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 (sendTelemetry) { + Telemetry::ScalarAdd( + Telemetry::ScalarID::DOM_CONTENTPROCESS_BUILDID_MISMATCH_FALSE_POSITIVE, + 1); + } +#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() && + !OwnerIsMozBrowserFrame()) { + 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; + } + + // <iframe mozbrowser> is allowed to set `mozprivatebrowsing` to + // force-enable private browsing. + if (OwnerIsMozBrowserFrame()) { + if (mOwnerContent->HasAttr(kNameSpaceID_None, + nsGkAtoms::mozprivatebrowsing)) { + attrs.SyncAttributesWithPrivateBrowsing(true); + usePrivateBrowsing = true; + } + } + } + + // 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); + } + } +} |