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Diffstat (limited to '')
| -rw-r--r-- | dom/ipc/BrowserChild.cpp | 3848 |
1 files changed, 3848 insertions, 0 deletions
diff --git a/dom/ipc/BrowserChild.cpp b/dom/ipc/BrowserChild.cpp new file mode 100644 index 0000000000..95fc4de14d --- /dev/null +++ b/dom/ipc/BrowserChild.cpp @@ -0,0 +1,3848 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "base/basictypes.h" + +#include "BrowserChild.h" + +#ifdef ACCESSIBILITY +# include "mozilla/a11y/DocAccessibleChild.h" +#endif +#include <algorithm> +#include <utility> + +#include "BrowserParent.h" +#include "ContentChild.h" +#include "DocumentInlines.h" +#include "EventStateManager.h" +#include "MMPrinter.h" +#include "PermissionMessageUtils.h" +#include "PuppetWidget.h" +#include "StructuredCloneData.h" +#include "UnitTransforms.h" +#include "Units.h" +#include "VRManagerChild.h" +#include "ipc/nsGUIEventIPC.h" +#include "js/JSON.h" +#include "mozilla/Assertions.h" +#include "mozilla/AsyncEventDispatcher.h" +#include "mozilla/BasePrincipal.h" +#include "mozilla/ClearOnShutdown.h" +#include "mozilla/EventForwards.h" +#include "mozilla/EventListenerManager.h" +#include "mozilla/HoldDropJSObjects.h" +#include "mozilla/IMEStateManager.h" +#include "mozilla/LookAndFeel.h" +#include "mozilla/MouseEvents.h" +#include "mozilla/NativeKeyBindingsType.h" +#include "mozilla/NullPrincipal.h" +#include "mozilla/Preferences.h" +#include "mozilla/PresShell.h" +#include "mozilla/ProcessHangMonitor.h" +#include "mozilla/ProfilerLabels.h" +#include "mozilla/ResultExtensions.h" +#include "mozilla/ScopeExit.h" +#include "mozilla/Services.h" +#include "mozilla/StaticPrefs_dom.h" +#include "mozilla/StaticPrefs_fission.h" +#include "mozilla/StaticPtr.h" +#include "mozilla/Telemetry.h" +#include "mozilla/TextEvents.h" +#include "mozilla/TouchEvents.h" +#include "mozilla/ToString.h" +#include "mozilla/Unused.h" +#include "mozilla/dom/AutoPrintEventDispatcher.h" +#include "mozilla/dom/BrowserBridgeChild.h" +#include "mozilla/dom/DataTransfer.h" +#include "mozilla/dom/DocGroup.h" +#include "mozilla/dom/Element.h" +#include "mozilla/dom/Event.h" +#include "mozilla/dom/JSWindowActorChild.h" +#include "mozilla/dom/ImageDocument.h" +#include "mozilla/dom/LoadURIOptionsBinding.h" +#include "mozilla/dom/MediaDocument.h" +#include "mozilla/dom/MessageManagerBinding.h" +#include "mozilla/dom/MouseEventBinding.h" +#include "mozilla/dom/Nullable.h" +#include "mozilla/dom/PBrowser.h" +#include "mozilla/dom/PaymentRequestChild.h" +#include "mozilla/dom/PointerEventHandler.h" +#include "mozilla/dom/SessionStoreUtils.h" +#include "mozilla/dom/SessionStoreChild.h" +#include "mozilla/dom/WindowGlobalChild.h" +#include "mozilla/dom/WindowProxyHolder.h" +#include "mozilla/gfx/CrossProcessPaint.h" +#include "mozilla/gfx/Matrix.h" +#include "mozilla/gfx/gfxVars.h" +#include "mozilla/ipc/BackgroundChild.h" +#include "mozilla/ipc/BackgroundUtils.h" +#include "mozilla/ipc/PBackgroundChild.h" +#include "mozilla/ipc/URIUtils.h" +#include "mozilla/layers/APZCCallbackHelper.h" +#include "mozilla/layers/TouchActionHelper.h" +#include "mozilla/layers/APZCTreeManagerChild.h" +#include "mozilla/layers/APZChild.h" +#include "mozilla/layers/APZEventState.h" +#include "mozilla/layers/CompositorBridgeChild.h" +#include "mozilla/layers/ContentProcessController.h" +#include "mozilla/layers/DoubleTapToZoom.h" +#include "mozilla/layers/IAPZCTreeManager.h" +#include "mozilla/layers/ImageBridgeChild.h" +#include "mozilla/layers/InputAPZContext.h" +#include "mozilla/layers/WebRenderLayerManager.h" +#include "nsBrowserStatusFilter.h" +#include "nsColorPickerProxy.h" +#include "nsCommandParams.h" +#include "nsContentPermissionHelper.h" +#include "nsContentUtils.h" +#include "nsDeviceContext.h" +#include "nsDocShell.h" +#include "nsDocShellLoadState.h" +#include "nsEmbedCID.h" +#include "nsExceptionHandler.h" +#include "nsFilePickerProxy.h" +#include "nsFocusManager.h" +#include "nsGlobalWindow.h" +#include "nsIBaseWindow.h" +#include "nsIBrowserDOMWindow.h" +#include "nsIClassifiedChannel.h" +#include "nsIDocShell.h" +#include "nsIFrame.h" +#include "nsILoadContext.h" +#include "nsISHEntry.h" +#include "nsISHistory.h" +#include "nsIScreenManager.h" +#include "nsIScriptError.h" +#include "nsISecureBrowserUI.h" +#include "nsIURI.h" +#include "nsIURIMutator.h" +#include "nsIWeakReferenceUtils.h" +#include "nsIWebBrowser.h" +#include "nsIWebProgress.h" +#include "nsLayoutUtils.h" +#include "nsNetUtil.h" +#include "nsIOpenWindowInfo.h" +#include "nsPIDOMWindow.h" +#include "nsPIWindowRoot.h" +#include "nsPointerHashKeys.h" +#include "nsPrintfCString.h" +#include "nsQueryActor.h" +#include "nsQueryObject.h" +#include "nsRefreshDriver.h" +#include "nsSandboxFlags.h" +#include "nsString.h" +#include "nsTHashtable.h" +#include "nsThreadManager.h" +#include "nsThreadUtils.h" +#include "nsViewManager.h" +#include "nsViewportInfo.h" +#include "nsWebBrowser.h" +#include "nsWindowWatcher.h" +#include "nsIXULRuntime.h" + +#ifdef MOZ_WAYLAND +# include "nsAppRunner.h" +#endif + +#ifdef NS_PRINTING +# include "mozilla/layout/RemotePrintJobChild.h" +# include "nsIPrintSettings.h" +# include "nsIPrintSettingsService.h" +# include "nsIWebBrowserPrint.h" +#endif + +static mozilla::LazyLogModule sApzChildLog("apz.child"); + +using namespace mozilla; +using namespace mozilla::dom; +using namespace mozilla::dom::ipc; +using namespace mozilla::ipc; +using namespace mozilla::layers; +using namespace mozilla::layout; +using namespace mozilla::widget; +using mozilla::layers::GeckoContentController; + +static const char BEFORE_FIRST_PAINT[] = "before-first-paint"; + +static uint32_t sConsecutiveTouchMoveCount = 0; + +using BrowserChildMap = nsTHashMap<nsUint64HashKey, BrowserChild*>; +static BrowserChildMap* sBrowserChildren; +StaticMutex sBrowserChildrenMutex; + +already_AddRefed<Document> BrowserChild::GetTopLevelDocument() const { + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + nsCOMPtr<Document> doc = docShell ? docShell->GetExtantDocument() : nullptr; + return doc.forget(); +} + +PresShell* BrowserChild::GetTopLevelPresShell() const { + if (RefPtr<Document> doc = GetTopLevelDocument()) { + return doc->GetPresShell(); + } + return nullptr; +} + +bool BrowserChild::UpdateFrame(const RepaintRequest& aRequest) { + MOZ_ASSERT(aRequest.GetScrollId() != ScrollableLayerGuid::NULL_SCROLL_ID); + + if (aRequest.IsRootContent()) { + if (PresShell* presShell = GetTopLevelPresShell()) { + // Guard against stale updates (updates meant for a pres shell which + // has since been torn down and destroyed). + if (aRequest.GetPresShellId() == presShell->GetPresShellId()) { + APZCCallbackHelper::UpdateRootFrame(aRequest); + return true; + } + } + } else { + // aRequest.mIsRoot is false, so we are trying to update a subframe. + // This requires special handling. + APZCCallbackHelper::UpdateSubFrame(aRequest); + return true; + } + return true; +} + +class BrowserChild::DelayedDeleteRunnable final : public Runnable, + public nsIRunnablePriority { + RefPtr<BrowserChild> mBrowserChild; + + // In order to try that this runnable runs after everything that could + // possibly touch this tab, we send it through the event queue twice. + bool mReadyToDelete = false; + + public: + explicit DelayedDeleteRunnable(BrowserChild* aBrowserChild) + : Runnable("BrowserChild::DelayedDeleteRunnable"), + mBrowserChild(aBrowserChild) { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(aBrowserChild); + } + + NS_DECL_ISUPPORTS_INHERITED + + private: + ~DelayedDeleteRunnable() { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(!mBrowserChild); + } + + NS_IMETHOD GetPriority(uint32_t* aPriority) override { + *aPriority = nsIRunnablePriority::PRIORITY_NORMAL; + return NS_OK; + } + + NS_IMETHOD + Run() override { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(mBrowserChild); + + if (!mReadyToDelete) { + // This time run this runnable at input priority. + mReadyToDelete = true; + MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThread(this)); + return NS_OK; + } + + // Check in case ActorDestroy was called after RecvDestroy message. + if (mBrowserChild->IPCOpen()) { + Unused << PBrowserChild::Send__delete__(mBrowserChild); + } + + mBrowserChild = nullptr; + return NS_OK; + } +}; + +NS_IMPL_ISUPPORTS_INHERITED(BrowserChild::DelayedDeleteRunnable, Runnable, + nsIRunnablePriority) + +namespace { +std::map<TabId, RefPtr<BrowserChild>>& NestedBrowserChildMap() { + MOZ_ASSERT(NS_IsMainThread()); + static std::map<TabId, RefPtr<BrowserChild>> sNestedBrowserChildMap; + return sNestedBrowserChildMap; +} +} // namespace + +already_AddRefed<BrowserChild> BrowserChild::FindBrowserChild( + const TabId& aTabId) { + auto iter = NestedBrowserChildMap().find(aTabId); + if (iter == NestedBrowserChildMap().end()) { + return nullptr; + } + RefPtr<BrowserChild> browserChild = iter->second; + return browserChild.forget(); +} + +/*static*/ +already_AddRefed<BrowserChild> BrowserChild::Create( + ContentChild* aManager, const TabId& aTabId, const TabContext& aContext, + BrowsingContext* aBrowsingContext, uint32_t aChromeFlags, + bool aIsTopLevel) { + RefPtr<BrowserChild> iframe = new BrowserChild( + aManager, aTabId, aContext, aBrowsingContext, aChromeFlags, aIsTopLevel); + return iframe.forget(); +} + +BrowserChild::BrowserChild(ContentChild* aManager, const TabId& aTabId, + const TabContext& aContext, + BrowsingContext* aBrowsingContext, + uint32_t aChromeFlags, bool aIsTopLevel) + : TabContext(aContext), + mBrowserChildMessageManager(nullptr), + mManager(aManager), + mBrowsingContext(aBrowsingContext), + mChromeFlags(aChromeFlags), + mMaxTouchPoints(0), + mLayersId{0}, + mEffectsInfo{EffectsInfo::FullyHidden()}, + mDynamicToolbarMaxHeight(0), + mUniqueId(aTabId), + mDidFakeShow(false), + mTriedBrowserInit(false), + mIgnoreKeyPressEvent(false), + mHasValidInnerSize(false), + mDestroyed(false), + mIsTopLevel(aIsTopLevel), + mIsTransparent(false), + mIPCOpen(false), + mDidSetRealShowInfo(false), + mDidLoadURLInit(false), + mSkipKeyPress(false), + mDidSetEffectsInfo(false), + mShouldSendWebProgressEventsToParent(false), + mRenderLayers(true), + mIsPreservingLayers(false), + mLayersObserverEpoch{1}, +#if defined(XP_WIN) && defined(ACCESSIBILITY) + mNativeWindowHandle(0), +#endif +#if defined(ACCESSIBILITY) + mTopLevelDocAccessibleChild(nullptr), +#endif + mCancelContentJSEpoch(0) { + mozilla::HoldJSObjects(this); + + // preloaded BrowserChild should not be added to child map + if (mUniqueId) { + MOZ_ASSERT(NestedBrowserChildMap().find(mUniqueId) == + NestedBrowserChildMap().end()); + NestedBrowserChildMap()[mUniqueId] = this; + } + mCoalesceMouseMoveEvents = StaticPrefs::dom_events_coalesce_mousemove(); + if (mCoalesceMouseMoveEvents) { + mCoalescedMouseEventFlusher = new CoalescedMouseMoveFlusher(this); + } + + if (StaticPrefs::dom_events_coalesce_touchmove()) { + mCoalescedTouchMoveEventFlusher = new CoalescedTouchMoveFlusher(this); + } +} + +const CompositorOptions& BrowserChild::GetCompositorOptions() const { + // If you're calling this before mCompositorOptions is set, well.. don't. + MOZ_ASSERT(mCompositorOptions); + return mCompositorOptions.ref(); +} + +bool BrowserChild::AsyncPanZoomEnabled() const { + // This might get called by the TouchEvent::PrefEnabled code before we have + // mCompositorOptions populated (bug 1370089). In that case we just assume + // APZ is enabled because we're in a content process (because BrowserChild) + // and APZ is probably going to be enabled here since e10s is enabled. + return mCompositorOptions ? mCompositorOptions->UseAPZ() : true; +} + +NS_IMETHODIMP +BrowserChild::Observe(nsISupports* aSubject, const char* aTopic, + const char16_t* aData) { + if (!strcmp(aTopic, BEFORE_FIRST_PAINT)) { + if (AsyncPanZoomEnabled()) { + nsCOMPtr<Document> subject(do_QueryInterface(aSubject)); + nsCOMPtr<Document> doc(GetTopLevelDocument()); + + if (subject == doc) { + RefPtr<PresShell> presShell = doc->GetPresShell(); + if (presShell) { + presShell->SetIsFirstPaint(true); + } + + APZCCallbackHelper::InitializeRootDisplayport(presShell); + } + } + } + + return NS_OK; +} + +void BrowserChild::ContentReceivedInputBlock(uint64_t aInputBlockId, + bool aPreventDefault) const { + if (mApzcTreeManager) { + mApzcTreeManager->ContentReceivedInputBlock(aInputBlockId, aPreventDefault); + } +} + +void BrowserChild::SetTargetAPZC( + uint64_t aInputBlockId, + const nsTArray<ScrollableLayerGuid>& aTargets) const { + if (mApzcTreeManager) { + mApzcTreeManager->SetTargetAPZC(aInputBlockId, aTargets); + } +} + +bool BrowserChild::DoUpdateZoomConstraints( + const uint32_t& aPresShellId, const ViewID& aViewId, + const Maybe<ZoomConstraints>& aConstraints) { + if (!mApzcTreeManager || mDestroyed) { + return false; + } + + ScrollableLayerGuid guid = + ScrollableLayerGuid(mLayersId, aPresShellId, aViewId); + + mApzcTreeManager->UpdateZoomConstraints(guid, aConstraints); + return true; +} + +nsresult BrowserChild::Init(mozIDOMWindowProxy* aParent, + WindowGlobalChild* aInitialWindowChild) { + MOZ_ASSERT_IF(aInitialWindowChild, + aInitialWindowChild->BrowsingContext() == mBrowsingContext); + + nsCOMPtr<nsIWidget> widget = nsIWidget::CreatePuppetWidget(this); + mPuppetWidget = static_cast<PuppetWidget*>(widget.get()); + if (!mPuppetWidget) { + NS_ERROR("couldn't create fake widget"); + return NS_ERROR_FAILURE; + } + mPuppetWidget->InfallibleCreate(nullptr, + nullptr, // no parents + LayoutDeviceIntRect(0, 0, 0, 0), + nullptr); // HandleWidgetEvent + + mWebBrowser = nsWebBrowser::Create(this, mPuppetWidget, mBrowsingContext, + aInitialWindowChild); + nsIWebBrowser* webBrowser = mWebBrowser; + + mWebNav = do_QueryInterface(webBrowser); + NS_ASSERTION(mWebNav, "nsWebBrowser doesn't implement nsIWebNavigation?"); + + // IPC uses a WebBrowser object for which DNS prefetching is turned off + // by default. But here we really want it, so enable it explicitly + mWebBrowser->SetAllowDNSPrefetch(true); + + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + MOZ_ASSERT(docShell); + + mStatusFilter = new nsBrowserStatusFilter(); + + nsresult rv = + mStatusFilter->AddProgressListener(this, nsIWebProgress::NOTIFY_ALL); + NS_ENSURE_SUCCESS(rv, rv); + + { + nsCOMPtr<nsIWebProgress> webProgress = do_QueryInterface(docShell); + rv = webProgress->AddProgressListener(mStatusFilter, + nsIWebProgress::NOTIFY_ALL); + NS_ENSURE_SUCCESS(rv, rv); + } + +#ifdef DEBUG + nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(WebNavigation()); + MOZ_ASSERT(loadContext); + MOZ_ASSERT(loadContext->UseRemoteTabs() == + !!(mChromeFlags & nsIWebBrowserChrome::CHROME_REMOTE_WINDOW)); + MOZ_ASSERT(loadContext->UseRemoteSubframes() == + !!(mChromeFlags & nsIWebBrowserChrome::CHROME_FISSION_WINDOW)); +#endif // defined(DEBUG) + + // Few lines before, baseWindow->Create() will end up creating a new + // window root in nsGlobalWindow::SetDocShell. + // Then this chrome event handler, will be inherited to inner windows. + // We want to also set it to the docshell so that inner windows + // and any code that has access to the docshell + // can all listen to the same chrome event handler. + // XXX: ideally, we would set a chrome event handler earlier, + // and all windows, even the root one, will use the docshell one. + nsCOMPtr<nsPIDOMWindowOuter> window = do_GetInterface(WebNavigation()); + NS_ENSURE_TRUE(window, NS_ERROR_FAILURE); + nsCOMPtr<EventTarget> chromeHandler = window->GetChromeEventHandler(); + docShell->SetChromeEventHandler(chromeHandler); + + // Window scrollbar flags only affect top level remote frames, not fission + // frames. + if (mIsTopLevel) { + nsContentUtils::SetScrollbarsVisibility( + docShell, !!(mChromeFlags & nsIWebBrowserChrome::CHROME_SCROLLBARS)); + } + + nsWeakPtr weakPtrThis = do_GetWeakReference( + static_cast<nsIBrowserChild*>(this)); // for capture by the lambda + ContentReceivedInputBlockCallback callback( + [weakPtrThis](uint64_t aInputBlockId, bool aPreventDefault) { + if (nsCOMPtr<nsIBrowserChild> browserChild = + do_QueryReferent(weakPtrThis)) { + static_cast<BrowserChild*>(browserChild.get()) + ->ContentReceivedInputBlock(aInputBlockId, aPreventDefault); + } + }); + mAPZEventState = new APZEventState(mPuppetWidget, std::move(callback)); + + mIPCOpen = true; + + if (StaticPrefs::browser_sessionstore_platform_collection_AtStartup()) { + mSessionStoreChild = SessionStoreChild::GetOrCreate(mBrowsingContext); + } + + // We've all set up, make sure our visibility state is consistent. This is + // important for OOP iframes, which start off as hidden. + UpdateVisibility(); + + return NS_OK; +} + +NS_IMPL_CYCLE_COLLECTION_CLASS(BrowserChild) + +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(BrowserChild) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mBrowserChildMessageManager) + tmp->nsMessageManagerScriptExecutor::Unlink(); + NS_IMPL_CYCLE_COLLECTION_UNLINK(mStatusFilter) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mWebNav) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mBrowsingContext) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mSessionStoreChild) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mContentTransformPromise) + NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_REFERENCE +NS_IMPL_CYCLE_COLLECTION_UNLINK_END + +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(BrowserChild) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBrowserChildMessageManager) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mStatusFilter) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWebNav) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBrowsingContext) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSessionStoreChild) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mContentTransformPromise) +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(BrowserChild) + tmp->nsMessageManagerScriptExecutor::Trace(aCallbacks, aClosure); +NS_IMPL_CYCLE_COLLECTION_TRACE_END + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(BrowserChild) + NS_INTERFACE_MAP_ENTRY(nsIWebBrowserChrome) + NS_INTERFACE_MAP_ENTRY(nsIWebBrowserChromeFocus) + NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor) + NS_INTERFACE_MAP_ENTRY(nsIWindowProvider) + NS_INTERFACE_MAP_ENTRY(nsIBrowserChild) + NS_INTERFACE_MAP_ENTRY(nsIObserver) + NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference) + NS_INTERFACE_MAP_ENTRY(nsITooltipListener) + NS_INTERFACE_MAP_ENTRY(nsIWebProgressListener) + NS_INTERFACE_MAP_ENTRY(nsIWebProgressListener2) + NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIBrowserChild) +NS_INTERFACE_MAP_END + +NS_IMPL_CYCLE_COLLECTING_ADDREF(BrowserChild) +NS_IMPL_CYCLE_COLLECTING_RELEASE(BrowserChild) + +NS_IMETHODIMP +BrowserChild::GetChromeFlags(uint32_t* aChromeFlags) { + *aChromeFlags = mChromeFlags; + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::SetChromeFlags(uint32_t aChromeFlags) { + NS_WARNING("trying to SetChromeFlags from content process?"); + + return NS_ERROR_NOT_IMPLEMENTED; +} + +NS_IMETHODIMP +BrowserChild::RemoteDropLinks( + const nsTArray<RefPtr<nsIDroppedLinkItem>>& aLinks) { + nsTArray<nsString> linksArray; + nsresult rv = NS_OK; + for (nsIDroppedLinkItem* link : aLinks) { + nsString tmp; + rv = link->GetUrl(tmp); + if (NS_FAILED(rv)) { + return rv; + } + linksArray.AppendElement(tmp); + + rv = link->GetName(tmp); + if (NS_FAILED(rv)) { + return rv; + } + linksArray.AppendElement(tmp); + + rv = link->GetType(tmp); + if (NS_FAILED(rv)) { + return rv; + } + linksArray.AppendElement(tmp); + } + bool sent = SendDropLinks(linksArray); + + return sent ? NS_OK : NS_ERROR_FAILURE; +} + +NS_IMETHODIMP +BrowserChild::ShowAsModal() { + NS_WARNING("BrowserChild::ShowAsModal not supported in BrowserChild"); + + return NS_ERROR_NOT_IMPLEMENTED; +} + +NS_IMETHODIMP +BrowserChild::IsWindowModal(bool* aRetVal) { + *aRetVal = false; + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::SetLinkStatus(const nsAString& aStatusText) { + // We can only send the status after the ipc machinery is set up + if (IPCOpen()) { + SendSetLinkStatus(aStatusText); + } + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::SetDimensions(DimensionRequest&& aRequest) { + // The parent is in charge of the dimension changes. If JS code wants to + // change the dimensions (moveTo, screenX, etc.) we send a message to the + // parent about the new requested dimension, the parent does the resize/move + // then send a message to the child to update itself. For APIs like screenX + // this function is called with only the changed values. In a series of calls + // like window.screenX = 10; window.screenY = 10; for the second call, since + // screenX is not yet updated we might accidentally reset back screenX to it's + // old value. To avoid this, if a parameter did not change, we want the parent + // to handle the unchanged values. + + double scale = mPuppetWidget ? mPuppetWidget->GetDefaultScale().scale : 1.0; + SendSetDimensions(aRequest, scale); + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::GetDimensions(DimensionKind aDimensionKind, int32_t* aX, + int32_t* aY, int32_t* aCx, int32_t* aCy) { + ScreenIntRect rect = GetOuterRect(); + if (aDimensionKind == DimensionKind::Inner) { + if (aX || aY) { + return NS_ERROR_NOT_IMPLEMENTED; + } + rect.SizeTo(GetInnerSize()); + } + if (aX) { + *aX = rect.x; + } + if (aY) { + *aY = rect.y; + } + if (aCx) { + *aCx = rect.width; + } + if (aCy) { + *aCy = rect.height; + } + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::Blur() { return NS_ERROR_NOT_IMPLEMENTED; } + +NS_IMETHODIMP +BrowserChild::FocusNextElement(bool aForDocumentNavigation) { + SendMoveFocus(true, aForDocumentNavigation); + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::FocusPrevElement(bool aForDocumentNavigation) { + SendMoveFocus(false, aForDocumentNavigation); + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::GetInterface(const nsIID& aIID, void** aSink) { + // XXXbz should we restrict the set of interfaces we hand out here? + // See bug 537429 + return QueryInterface(aIID, aSink); +} + +NS_IMETHODIMP +BrowserChild::ProvideWindow(nsIOpenWindowInfo* aOpenWindowInfo, + uint32_t aChromeFlags, bool aCalledFromJS, + nsIURI* aURI, const nsAString& aName, + const nsACString& aFeatures, bool aForceNoOpener, + bool aForceNoReferrer, bool aIsPopupRequested, + nsDocShellLoadState* aLoadState, bool* aWindowIsNew, + BrowsingContext** aReturn) { + *aReturn = nullptr; + + RefPtr<BrowsingContext> parent = aOpenWindowInfo->GetParent(); + + int32_t openLocation = nsWindowWatcher::GetWindowOpenLocation( + parent->GetDOMWindow(), aChromeFlags, aCalledFromJS, + aOpenWindowInfo->GetIsForPrinting()); + + // If it turns out we're opening in the current browser, just hand over the + // current browser's docshell. + if (openLocation == nsIBrowserDOMWindow::OPEN_CURRENTWINDOW) { + nsCOMPtr<nsIWebBrowser> browser = do_GetInterface(WebNavigation()); + *aWindowIsNew = false; + + nsCOMPtr<mozIDOMWindowProxy> win; + MOZ_TRY(browser->GetContentDOMWindow(getter_AddRefs(win))); + + RefPtr<BrowsingContext> bc( + nsPIDOMWindowOuter::From(win)->GetBrowsingContext()); + bc.forget(aReturn); + return NS_OK; + } + + // Note that ProvideWindowCommon may return NS_ERROR_ABORT if the + // open window call was canceled. It's important that we pass this error + // code back to our caller. + ContentChild* cc = ContentChild::GetSingleton(); + return cc->ProvideWindowCommon( + WrapNotNull(this), aOpenWindowInfo, aChromeFlags, aCalledFromJS, aURI, + aName, aFeatures, aForceNoOpener, aForceNoReferrer, aIsPopupRequested, + aLoadState, aWindowIsNew, aReturn); +} + +void BrowserChild::DestroyWindow() { + mBrowsingContext = nullptr; + + if (mStatusFilter) { + if (nsCOMPtr<nsIWebProgress> webProgress = + do_QueryInterface(WebNavigation())) { + webProgress->RemoveProgressListener(mStatusFilter); + } + + mStatusFilter->RemoveProgressListener(this); + mStatusFilter = nullptr; + } + + if (mCoalescedMouseEventFlusher) { + mCoalescedMouseEventFlusher->RemoveObserver(); + mCoalescedMouseEventFlusher = nullptr; + } + + if (mCoalescedTouchMoveEventFlusher) { + mCoalescedTouchMoveEventFlusher->RemoveObserver(); + mCoalescedTouchMoveEventFlusher = nullptr; + } + + if (mSessionStoreChild) { + mSessionStoreChild->Stop(); + mSessionStoreChild = nullptr; + } + + // In case we don't have chance to process all entries, clean all data in + // the queue. + while (mToBeDispatchedMouseData.GetSize() > 0) { + UniquePtr<CoalescedMouseData> data( + static_cast<CoalescedMouseData*>(mToBeDispatchedMouseData.PopFront())); + data.reset(); + } + + nsCOMPtr<nsIBaseWindow> baseWindow = do_QueryInterface(WebNavigation()); + if (baseWindow) baseWindow->Destroy(); + + if (mPuppetWidget) { + mPuppetWidget->Destroy(); + } + + mLayersConnected = Nothing(); + + if (mLayersId.IsValid()) { + StaticMutexAutoLock lock(sBrowserChildrenMutex); + + MOZ_ASSERT(sBrowserChildren); + sBrowserChildren->Remove(uint64_t(mLayersId)); + if (!sBrowserChildren->Count()) { + delete sBrowserChildren; + sBrowserChildren = nullptr; + } + mLayersId = layers::LayersId{0}; + } +} + +void BrowserChild::ActorDestroy(ActorDestroyReason why) { + mIPCOpen = false; + + DestroyWindow(); + + if (mBrowserChildMessageManager) { + // We should have a message manager if the global is alive, but it + // seems sometimes we don't. Assert in aurora/nightly, but don't + // crash in release builds. + MOZ_DIAGNOSTIC_ASSERT(mBrowserChildMessageManager->GetMessageManager()); + if (mBrowserChildMessageManager->GetMessageManager()) { + // The messageManager relays messages via the BrowserChild which + // no longer exists. + mBrowserChildMessageManager->DisconnectMessageManager(); + } + } + + if (GetTabId() != 0) { + NestedBrowserChildMap().erase(GetTabId()); + } +} + +BrowserChild::~BrowserChild() { + mAnonymousGlobalScopes.Clear(); + + DestroyWindow(); + + nsCOMPtr<nsIWebBrowser> webBrowser = do_QueryInterface(WebNavigation()); + if (webBrowser) { + webBrowser->SetContainerWindow(nullptr); + } + + mozilla::DropJSObjects(this); +} + +mozilla::ipc::IPCResult BrowserChild::RecvWillChangeProcess() { + if (mWebBrowser) { + mWebBrowser->SetWillChangeProcess(); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvLoadURL( + nsDocShellLoadState* aLoadState, const ParentShowInfo& aInfo) { + if (!mDidLoadURLInit) { + mDidLoadURLInit = true; + if (!InitBrowserChildMessageManager()) { + return IPC_FAIL_NO_REASON(this); + } + + ApplyParentShowInfo(aInfo); + } + nsAutoCString spec; + aLoadState->URI()->GetSpec(spec); + + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + if (!docShell) { + NS_WARNING("WebNavigation does not have a docshell"); + return IPC_OK(); + } + docShell->LoadURI(aLoadState, true); + + CrashReporter::AnnotateCrashReport(CrashReporter::Annotation::URL, spec); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvCreateAboutBlankContentViewer( + nsIPrincipal* aPrincipal, nsIPrincipal* aPartitionedPrincipal) { + if (aPrincipal->GetIsExpandedPrincipal() || + aPartitionedPrincipal->GetIsExpandedPrincipal()) { + return IPC_FAIL(this, "Cannot create document with an expanded principal"); + } + if (aPrincipal->IsSystemPrincipal() || + aPartitionedPrincipal->IsSystemPrincipal()) { + MOZ_ASSERT_UNREACHABLE( + "Cannot use CreateAboutBlankContentViewer to create system principal " + "document in content"); + return IPC_OK(); + } + + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + if (!docShell) { + MOZ_ASSERT_UNREACHABLE("WebNavigation does not have a docshell"); + return IPC_OK(); + } + + nsCOMPtr<nsIURI> currentURI; + MOZ_ALWAYS_SUCCEEDS( + WebNavigation()->GetCurrentURI(getter_AddRefs(currentURI))); + if (!currentURI || !NS_IsAboutBlank(currentURI)) { + NS_WARNING("Can't create a ContentViewer unless on about:blank"); + return IPC_OK(); + } + + docShell->CreateAboutBlankContentViewer(aPrincipal, aPartitionedPrincipal, + nullptr); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvResumeLoad( + const uint64_t& aPendingSwitchID, const ParentShowInfo& aInfo) { + if (!mDidLoadURLInit) { + mDidLoadURLInit = true; + if (!InitBrowserChildMessageManager()) { + return IPC_FAIL_NO_REASON(this); + } + + ApplyParentShowInfo(aInfo); + } + + nsresult rv = WebNavigation()->ResumeRedirectedLoad(aPendingSwitchID, -1); + if (NS_FAILED(rv)) { + NS_WARNING("WebNavigation()->ResumeRedirectedLoad failed"); + } + + return IPC_OK(); +} + +nsresult BrowserChild::CloneDocumentTreeIntoSelf( + const MaybeDiscarded<BrowsingContext>& aSourceBC, + const embedding::PrintData& aPrintData) { +#ifdef NS_PRINTING + if (NS_WARN_IF(aSourceBC.IsNullOrDiscarded())) { + return NS_ERROR_FAILURE; + } + nsCOMPtr<Document> sourceDocument = aSourceBC.get()->GetDocument(); + if (NS_WARN_IF(!sourceDocument)) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIDocShell> ourDocShell = do_GetInterface(WebNavigation()); + if (NS_WARN_IF(!ourDocShell)) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIContentViewer> cv; + ourDocShell->GetContentViewer(getter_AddRefs(cv)); + if (NS_WARN_IF(!cv)) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIPrintSettingsService> printSettingsSvc = + do_GetService("@mozilla.org/gfx/printsettings-service;1"); + if (NS_WARN_IF(!printSettingsSvc)) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIPrintSettings> printSettings; + nsresult rv = + printSettingsSvc->CreateNewPrintSettings(getter_AddRefs(printSettings)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + printSettingsSvc->DeserializeToPrintSettings(aPrintData, printSettings); + + RefPtr<Document> clone; + { + AutoPrintEventDispatcher dispatcher(*sourceDocument); + nsAutoScriptBlocker scriptBlocker; + bool hasInProcessCallbacks = false; + clone = sourceDocument->CreateStaticClone(ourDocShell, cv, printSettings, + &hasInProcessCallbacks); + if (NS_WARN_IF(!clone)) { + return NS_ERROR_FAILURE; + } + } + + rv = UpdateRemotePrintSettings(aPrintData); + if (NS_FAILED(rv)) { + return rv; + } + +#endif + return NS_OK; +} + +mozilla::ipc::IPCResult BrowserChild::RecvCloneDocumentTreeIntoSelf( + const MaybeDiscarded<BrowsingContext>& aSourceBC, + const embedding::PrintData& aPrintData, + CloneDocumentTreeIntoSelfResolver&& aResolve) { + nsresult rv = NS_OK; + +#ifdef NS_PRINTING + rv = CloneDocumentTreeIntoSelf(aSourceBC, aPrintData); +#endif + + aResolve(NS_SUCCEEDED(rv)); + return IPC_OK(); +} + +nsresult BrowserChild::UpdateRemotePrintSettings( + const embedding::PrintData& aPrintData) { +#ifdef NS_PRINTING + nsCOMPtr<nsIDocShell> ourDocShell = do_GetInterface(WebNavigation()); + if (NS_WARN_IF(!ourDocShell)) { + return NS_ERROR_FAILURE; + } + + RefPtr<Document> doc = ourDocShell->GetExtantDocument(); + if (NS_WARN_IF(!doc) || NS_WARN_IF(!doc->IsStaticDocument())) { + return NS_ERROR_FAILURE; + } + + RefPtr<BrowsingContext> bc = ourDocShell->GetBrowsingContext(); + if (NS_WARN_IF(!bc)) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIPrintSettingsService> printSettingsSvc = + do_GetService("@mozilla.org/gfx/printsettings-service;1"); + if (NS_WARN_IF(!printSettingsSvc)) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIPrintSettings> printSettings; + nsresult rv = + printSettingsSvc->CreateNewPrintSettings(getter_AddRefs(printSettings)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + printSettingsSvc->DeserializeToPrintSettings(aPrintData, printSettings); + + bc->PreOrderWalk([&](BrowsingContext* aBc) { + if (nsCOMPtr<nsIDocShell> inProcess = aBc->GetDocShell()) { + nsCOMPtr<nsIContentViewer> cv; + inProcess->GetContentViewer(getter_AddRefs(cv)); + if (NS_WARN_IF(!cv)) { + return BrowsingContext::WalkFlag::Skip; + } + // The CanRunScript analysis is not smart enough to see across + // the std::function PreOrderWalk uses, so we cheat a bit here, but it is + // fine because PreOrderWalk does deal with arbitrary script changing the + // BC tree, and our code above is simple enough and keeps strong refs to + // everything. + ([&]() MOZ_CAN_RUN_SCRIPT_BOUNDARY { + RefPtr<RemotePrintJobChild> printJob = + static_cast<RemotePrintJobChild*>( + aPrintData.remotePrintJob().AsChild()); + cv->SetPrintSettingsForSubdocument(printSettings, printJob); + }()); + } else if (RefPtr<BrowserBridgeChild> remoteChild = + BrowserBridgeChild::GetFrom(aBc->GetEmbedderElement())) { + Unused << remoteChild->SendUpdateRemotePrintSettings(aPrintData); + return BrowsingContext::WalkFlag::Skip; + } + return BrowsingContext::WalkFlag::Next; + }); +#endif + + return NS_OK; +} + +mozilla::ipc::IPCResult BrowserChild::RecvUpdateRemotePrintSettings( + const embedding::PrintData& aPrintData) { +#ifdef NS_PRINTING + UpdateRemotePrintSettings(aPrintData); +#endif + + return IPC_OK(); +} + +void BrowserChild::DoFakeShow(const ParentShowInfo& aParentShowInfo) { + OwnerShowInfo ownerInfo{ScreenIntSize(), ScrollbarPreference::Auto, + nsSizeMode_Normal}; + RecvShow(aParentShowInfo, ownerInfo); + mDidFakeShow = true; +} + +void BrowserChild::ApplyParentShowInfo(const ParentShowInfo& aInfo) { + // Even if we already set real show info, the dpi / rounding & scale may still + // be invalid (if BrowserParent wasn't able to get widget it would just send + // 0). So better to always set up-to-date values here. + if (aInfo.dpi() > 0) { + mPuppetWidget->UpdateBackingScaleCache(aInfo.dpi(), aInfo.widgetRounding(), + aInfo.defaultScale()); + } + + if (mDidSetRealShowInfo) { + return; + } + + if (!aInfo.fakeShowInfo()) { + // Once we've got one ShowInfo from parent, no need to update the values + // anymore. + mDidSetRealShowInfo = true; + } + + mIsTransparent = aInfo.isTransparent(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvShow( + const ParentShowInfo& aParentInfo, const OwnerShowInfo& aOwnerInfo) { + bool res = true; + + mPuppetWidget->SetSizeMode(aOwnerInfo.sizeMode()); + if (!mDidFakeShow) { + nsCOMPtr<nsIBaseWindow> baseWindow = do_QueryInterface(WebNavigation()); + if (!baseWindow) { + NS_ERROR("WebNavigation() doesn't QI to nsIBaseWindow"); + return IPC_FAIL_NO_REASON(this); + } + + baseWindow->SetVisibility(true); + res = InitBrowserChildMessageManager(); + } + + ApplyParentShowInfo(aParentInfo); + + if (!mIsTopLevel) { + RecvScrollbarPreferenceChanged(aOwnerInfo.scrollbarPreference()); + } + + if (!res) { + return IPC_FAIL_NO_REASON(this); + } + + UpdateVisibility(); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvInitRendering( + const TextureFactoryIdentifier& aTextureFactoryIdentifier, + const layers::LayersId& aLayersId, + const CompositorOptions& aCompositorOptions, const bool& aLayersConnected) { + mLayersConnected = Some(aLayersConnected); + mLayersConnectRequested = Some(aLayersConnected); + InitRenderingState(aTextureFactoryIdentifier, aLayersId, aCompositorOptions); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvScrollbarPreferenceChanged( + ScrollbarPreference aPreference) { + MOZ_ASSERT(!mIsTopLevel, + "Scrollbar visibility should be derived from chrome flags for " + "top-level windows"); + if (nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation())) { + nsDocShell::Cast(docShell)->SetScrollbarPreference(aPreference); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvCompositorOptionsChanged( + const CompositorOptions& aNewOptions) { + MOZ_ASSERT(mCompositorOptions); + + // The only compositor option we currently support changing is APZ + // enablement. Even that is only partially supported for now: + // * Going from APZ to non-APZ is fine - we just flip the stored flag. + // Note that we keep the actors (mApzcTreeManager, and the APZChild + // created in InitAPZState()) around (read on for why). + // * Going from non-APZ to APZ is only supported if we were using + // APZ initially (at InitRendering() time) and we are transitioning + // back. In this case, we just reuse the actors which we kept around. + // Fully supporting a non-APZ to APZ transition (i.e. even in cases + // where we initialized as non-APZ) would require setting up the actors + // here. (In that case, we would also have the options of destroying + // the actors in the APZ --> non-APZ case, and always re-creating them + // during a non-APZ --> APZ transition). + mCompositorOptions->SetUseAPZ(aNewOptions.UseAPZ()); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvUpdateDimensions( + const DimensionInfo& aDimensionInfo) { + if (mLayersConnected.isNothing()) { + return IPC_OK(); + } + + mUnscaledOuterRect = aDimensionInfo.rect(); + mClientOffset = aDimensionInfo.clientOffset(); + mChromeOffset = aDimensionInfo.chromeOffset(); + MOZ_ASSERT_IF(!IsTopLevel(), mChromeOffset == LayoutDeviceIntPoint()); + + SetUnscaledInnerSize(aDimensionInfo.size()); + if (!mHasValidInnerSize && aDimensionInfo.size().width != 0 && + aDimensionInfo.size().height != 0) { + mHasValidInnerSize = true; + } + + ScreenIntSize screenSize = GetInnerSize(); + ScreenIntRect screenRect = GetOuterRect(); + + // Make sure to set the size on the document viewer first. The + // MobileViewportManager needs the content viewer size to be updated before + // the reflow, otherwise it gets a stale size when it computes a new CSS + // viewport. + nsCOMPtr<nsIBaseWindow> baseWin = do_QueryInterface(WebNavigation()); + baseWin->SetPositionAndSize(0, 0, screenSize.width, screenSize.height, + nsIBaseWindow::eRepaint); + + mPuppetWidget->Resize(screenRect.x + mClientOffset.x + mChromeOffset.x, + screenRect.y + mClientOffset.y + mChromeOffset.y, + screenSize.width, screenSize.height, true); + + RecvSafeAreaInsetsChanged(mPuppetWidget->GetSafeAreaInsets()); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvSizeModeChanged( + const nsSizeMode& aSizeMode) { + mPuppetWidget->SetSizeMode(aSizeMode); + if (!mPuppetWidget->IsVisible()) { + return IPC_OK(); + } + nsCOMPtr<Document> document(GetTopLevelDocument()); + if (!document) { + return IPC_OK(); + } + nsPresContext* presContext = document->GetPresContext(); + if (presContext) { + presContext->SizeModeChanged(aSizeMode); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvChildToParentMatrix( + const Maybe<gfx::Matrix4x4>& aMatrix, + const ScreenRect& aTopLevelViewportVisibleRectInBrowserCoords) { + mChildToParentConversionMatrix = + LayoutDeviceToLayoutDeviceMatrix4x4::FromUnknownMatrix(aMatrix); + mTopLevelViewportVisibleRectInBrowserCoords = + aTopLevelViewportVisibleRectInBrowserCoords; + + if (mContentTransformPromise) { + mContentTransformPromise->MaybeResolveWithUndefined(); + mContentTransformPromise = nullptr; + } + + // Trigger an intersection observation update since ancestor viewports + // changed. + if (RefPtr<Document> toplevelDoc = GetTopLevelDocument()) { + if (nsPresContext* pc = toplevelDoc->GetPresContext()) { + pc->RefreshDriver()->EnsureIntersectionObservationsUpdateHappens(); + } + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvUpdateRemoteStyle( + const StyleImageRendering& aImageRendering) { + BrowsingContext* context = GetBrowsingContext(); + if (!context) { + return IPC_OK(); + } + + Document* document = context->GetDocument(); + if (!document) { + return IPC_OK(); + } + + if (document->IsImageDocument()) { + document->AsImageDocument()->UpdateRemoteStyle(aImageRendering); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvDynamicToolbarMaxHeightChanged( + const ScreenIntCoord& aHeight) { +#if defined(MOZ_WIDGET_ANDROID) + mDynamicToolbarMaxHeight = aHeight; + + RefPtr<Document> document = GetTopLevelDocument(); + if (!document) { + return IPC_OK(); + } + + if (RefPtr<nsPresContext> presContext = document->GetPresContext()) { + presContext->SetDynamicToolbarMaxHeight(aHeight); + } +#endif + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvDynamicToolbarOffsetChanged( + const ScreenIntCoord& aOffset) { +#if defined(MOZ_WIDGET_ANDROID) + RefPtr<Document> document = GetTopLevelDocument(); + if (!document) { + return IPC_OK(); + } + + if (nsPresContext* presContext = document->GetPresContext()) { + presContext->UpdateDynamicToolbarOffset(aOffset); + } +#endif + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvSuppressDisplayport( + const bool& aEnabled) { + if (RefPtr<PresShell> presShell = GetTopLevelPresShell()) { + presShell->SuppressDisplayport(aEnabled); + } + return IPC_OK(); +} + +void BrowserChild::HandleDoubleTap(const CSSPoint& aPoint, + const Modifiers& aModifiers, + const ScrollableLayerGuid& aGuid) { + MOZ_LOG( + sApzChildLog, LogLevel::Debug, + ("Handling double tap at %s with %p %p\n", ToString(aPoint).c_str(), + mBrowserChildMessageManager ? mBrowserChildMessageManager->GetWrapper() + : nullptr, + mBrowserChildMessageManager.get())); + + if (!mBrowserChildMessageManager) { + return; + } + + // Note: there is nothing to do with the modifiers here, as we are not + // synthesizing any sort of mouse event. + RefPtr<Document> document = GetTopLevelDocument(); + ZoomTarget zoomTarget = CalculateRectToZoomTo(document, aPoint); + // The double-tap can be dispatched by any scroll frame (so |aGuid| could be + // the guid of any scroll frame), but the zoom-to-rect operation must be + // performed by the root content scroll frame, so query its identifiers + // for the SendZoomToRect() call rather than using the ones from |aGuid|. + uint32_t presShellId; + ViewID viewId; + if (APZCCallbackHelper::GetOrCreateScrollIdentifiers( + document->GetDocumentElement(), &presShellId, &viewId) && + mApzcTreeManager) { + ScrollableLayerGuid guid(mLayersId, presShellId, viewId); + + mApzcTreeManager->ZoomToRect(guid, zoomTarget, + ZoomToRectBehavior::DEFAULT_BEHAVIOR); + } +} + +mozilla::ipc::IPCResult BrowserChild::RecvHandleTap( + const GeckoContentController::TapType& aType, + const LayoutDevicePoint& aPoint, const Modifiers& aModifiers, + const ScrollableLayerGuid& aGuid, const uint64_t& aInputBlockId) { + // IPDL doesn't hold a strong reference to protocols as they're not required + // to be refcounted. This function can run script, which may trigger a nested + // event loop, which may release this, so we hold a strong reference here. + RefPtr<BrowserChild> kungFuDeathGrip(this); + RefPtr<PresShell> presShell = GetTopLevelPresShell(); + if (!presShell) { + return IPC_OK(); + } + if (!presShell->GetPresContext()) { + return IPC_OK(); + } + CSSToLayoutDeviceScale scale( + presShell->GetPresContext()->CSSToDevPixelScale()); + CSSPoint point = aPoint / scale; + + // Stash the guid in InputAPZContext so that when the visual-to-layout + // transform is applied to the event's coordinates, we use the right transform + // based on the scroll frame being targeted. + // The other values don't really matter. + InputAPZContext context(aGuid, aInputBlockId, nsEventStatus_eSentinel); + + switch (aType) { + case GeckoContentController::TapType::eSingleTap: + if (mBrowserChildMessageManager) { + mAPZEventState->ProcessSingleTap(point, scale, aModifiers, 1, + aInputBlockId); + } + break; + case GeckoContentController::TapType::eDoubleTap: + HandleDoubleTap(point, aModifiers, aGuid); + break; + case GeckoContentController::TapType::eSecondTap: + if (mBrowserChildMessageManager) { + mAPZEventState->ProcessSingleTap(point, scale, aModifiers, 2, + aInputBlockId); + } + break; + case GeckoContentController::TapType::eLongTap: + if (mBrowserChildMessageManager) { + RefPtr<APZEventState> eventState(mAPZEventState); + eventState->ProcessLongTap(presShell, point, scale, aModifiers, + aInputBlockId); + } + break; + case GeckoContentController::TapType::eLongTapUp: + if (mBrowserChildMessageManager) { + RefPtr<APZEventState> eventState(mAPZEventState); + eventState->ProcessLongTapUp(presShell, point, scale, aModifiers); + } + break; + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityHandleTap( + const GeckoContentController::TapType& aType, + const LayoutDevicePoint& aPoint, const Modifiers& aModifiers, + const ScrollableLayerGuid& aGuid, const uint64_t& aInputBlockId) { + // IPDL doesn't hold a strong reference to protocols as they're not required + // to be refcounted. This function can run script, which may trigger a nested + // event loop, which may release this, so we hold a strong reference here. + RefPtr<BrowserChild> kungFuDeathGrip(this); + return RecvHandleTap(aType, aPoint, aModifiers, aGuid, aInputBlockId); +} + +bool BrowserChild::NotifyAPZStateChange( + const ViewID& aViewId, + const layers::GeckoContentController::APZStateChange& aChange, + const int& aArg, Maybe<uint64_t> aInputBlockId) { + mAPZEventState->ProcessAPZStateChange(aViewId, aChange, aArg, aInputBlockId); + nsCOMPtr<nsIObserverService> observerService = + mozilla::services::GetObserverService(); + if (aChange == + layers::GeckoContentController::APZStateChange::eTransformEnd) { + // This is used by tests to determine when the APZ is done doing whatever + // it's doing. XXX generify this as needed when writing additional tests. + observerService->NotifyObservers(nullptr, "APZ:TransformEnd", nullptr); + observerService->NotifyObservers(nullptr, "PanZoom:StateChange", + u"NOTHING"); + } else if (aChange == + layers::GeckoContentController::APZStateChange::eTransformBegin) { + observerService->NotifyObservers(nullptr, "PanZoom:StateChange", + u"PANNING"); + } + return true; +} + +void BrowserChild::StartScrollbarDrag( + const layers::AsyncDragMetrics& aDragMetrics) { + ScrollableLayerGuid guid(mLayersId, aDragMetrics.mPresShellId, + aDragMetrics.mViewId); + + if (mApzcTreeManager) { + mApzcTreeManager->StartScrollbarDrag(guid, aDragMetrics); + } +} + +void BrowserChild::ZoomToRect(const uint32_t& aPresShellId, + const ScrollableLayerGuid::ViewID& aViewId, + const CSSRect& aRect, const uint32_t& aFlags) { + ScrollableLayerGuid guid(mLayersId, aPresShellId, aViewId); + + if (mApzcTreeManager) { + mApzcTreeManager->ZoomToRect(guid, ZoomTarget{aRect}, aFlags); + } +} + +mozilla::ipc::IPCResult BrowserChild::RecvActivate(uint64_t aActionId) { + MOZ_ASSERT(mWebBrowser); + mWebBrowser->FocusActivate(aActionId); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvDeactivate(uint64_t aActionId) { + MOZ_ASSERT(mWebBrowser); + mWebBrowser->FocusDeactivate(aActionId); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvStopIMEStateManagement() { + IMEStateManager::StopIMEStateManagement(); + return IPC_OK(); +} + +void BrowserChild::ProcessPendingCoalescedTouchData() { + MOZ_ASSERT(StaticPrefs::dom_events_coalesce_touchmove()); + + if (mCoalescedTouchData.IsEmpty()) { + return; + } + + if (mCoalescedTouchMoveEventFlusher) { + mCoalescedTouchMoveEventFlusher->RemoveObserver(); + } + + UniquePtr<WidgetTouchEvent> touchMoveEvent = + mCoalescedTouchData.TakeCoalescedEvent(); + Unused << RecvRealTouchEvent(*touchMoveEvent, + mCoalescedTouchData.GetScrollableLayerGuid(), + mCoalescedTouchData.GetInputBlockId(), + mCoalescedTouchData.GetApzResponse()); +} + +void BrowserChild::ProcessPendingCoalescedMouseDataAndDispatchEvents() { + if (!mCoalesceMouseMoveEvents || !mCoalescedMouseEventFlusher) { + // We don't enable mouse coalescing or we are destroying BrowserChild. + return; + } + + // We may reentry the event loop and push more data to + // mToBeDispatchedMouseData while dispatching an event. + + // We may have some pending coalesced data while dispatch an event and reentry + // the event loop. In that case we don't have chance to consume the remainding + // pending data until we get new mouse events. Get some helps from + // mCoalescedMouseEventFlusher to trigger it. + mCoalescedMouseEventFlusher->StartObserver(); + + while (mToBeDispatchedMouseData.GetSize() > 0) { + UniquePtr<CoalescedMouseData> data( + static_cast<CoalescedMouseData*>(mToBeDispatchedMouseData.PopFront())); + + UniquePtr<WidgetMouseEvent> event = data->TakeCoalescedEvent(); + if (event) { + // Dispatch the pending events. Using HandleRealMouseButtonEvent + // to bypass the coalesce handling in RecvRealMouseMoveEvent. Can't use + // RecvRealMouseButtonEvent because we may also put some mouse events + // other than mousemove. + HandleRealMouseButtonEvent(*event, data->GetScrollableLayerGuid(), + data->GetInputBlockId()); + } + } + // mCoalescedMouseEventFlusher may be destroyed when reentrying the event + // loop. + if (mCoalescedMouseEventFlusher) { + mCoalescedMouseEventFlusher->RemoveObserver(); + } +} + +LayoutDeviceToLayoutDeviceMatrix4x4 +BrowserChild::GetChildToParentConversionMatrix() const { + if (mChildToParentConversionMatrix) { + return *mChildToParentConversionMatrix; + } + LayoutDevicePoint offset(GetChromeOffset()); + return LayoutDeviceToLayoutDeviceMatrix4x4::Translation(offset); +} + +Maybe<ScreenRect> BrowserChild::GetTopLevelViewportVisibleRectInBrowserCoords() + const { + if (!mChildToParentConversionMatrix) { + return Nothing(); + } + return Some(mTopLevelViewportVisibleRectInBrowserCoords); +} + +void BrowserChild::FlushAllCoalescedMouseData() { + MOZ_ASSERT(mCoalesceMouseMoveEvents); + + // Move all entries from mCoalescedMouseData to mToBeDispatchedMouseData. + for (const auto& data : mCoalescedMouseData.Values()) { + if (!data || data->IsEmpty()) { + continue; + } + UniquePtr<CoalescedMouseData> dispatchData = + MakeUnique<CoalescedMouseData>(); + + dispatchData->RetrieveDataFrom(*data); + mToBeDispatchedMouseData.Push(dispatchData.release()); + } + mCoalescedMouseData.Clear(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvRealMouseMoveEvent( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + if (mCoalesceMouseMoveEvents && mCoalescedMouseEventFlusher) { + CoalescedMouseData* data = + mCoalescedMouseData.GetOrInsertNew(aEvent.pointerId); + MOZ_ASSERT(data); + if (data->CanCoalesce(aEvent, aGuid, aInputBlockId)) { + data->Coalesce(aEvent, aGuid, aInputBlockId); + mCoalescedMouseEventFlusher->StartObserver(); + return IPC_OK(); + } + // Can't coalesce current mousemove event. Put the coalesced mousemove data + // with the same pointer id to mToBeDispatchedMouseData, coalesce the + // current one, and process all pending data in mToBeDispatchedMouseData. + UniquePtr<CoalescedMouseData> dispatchData = + MakeUnique<CoalescedMouseData>(); + + dispatchData->RetrieveDataFrom(*data); + mToBeDispatchedMouseData.Push(dispatchData.release()); + + // Put new data to replace the old one in the hash table. + CoalescedMouseData* newData = + mCoalescedMouseData + .InsertOrUpdate(aEvent.pointerId, MakeUnique<CoalescedMouseData>()) + .get(); + newData->Coalesce(aEvent, aGuid, aInputBlockId); + + // Dispatch all pending mouse events. + ProcessPendingCoalescedMouseDataAndDispatchEvents(); + mCoalescedMouseEventFlusher->StartObserver(); + } else if (!RecvRealMouseButtonEvent(aEvent, aGuid, aInputBlockId)) { + return IPC_FAIL_NO_REASON(this); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvRealMouseMoveEventForTests( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + return RecvRealMouseMoveEvent(aEvent, aGuid, aInputBlockId); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityRealMouseMoveEvent( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + return RecvRealMouseMoveEvent(aEvent, aGuid, aInputBlockId); +} + +mozilla::ipc::IPCResult +BrowserChild::RecvNormalPriorityRealMouseMoveEventForTests( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + return RecvRealMouseMoveEvent(aEvent, aGuid, aInputBlockId); +} + +mozilla::ipc::IPCResult BrowserChild::RecvSynthMouseMoveEvent( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + if (!RecvRealMouseButtonEvent(aEvent, aGuid, aInputBlockId)) { + return IPC_FAIL_NO_REASON(this); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPrioritySynthMouseMoveEvent( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + return RecvSynthMouseMoveEvent(aEvent, aGuid, aInputBlockId); +} + +mozilla::ipc::IPCResult BrowserChild::RecvRealMouseButtonEvent( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + if (mCoalesceMouseMoveEvents && mCoalescedMouseEventFlusher && + aEvent.mMessage != eMouseMove) { + // When receiving a mouse event other than mousemove, we have to dispatch + // all coalesced events before it. However, we can't dispatch all pending + // coalesced events directly because we may reentry the event loop while + // dispatching. To make sure we won't dispatch disorder events, we move all + // coalesced mousemove events and current event to a deque to dispatch them. + // When reentrying the event loop and dispatching more events, we put new + // events in the end of the nsQueue and dispatch events from the beginning. + FlushAllCoalescedMouseData(); + + UniquePtr<CoalescedMouseData> dispatchData = + MakeUnique<CoalescedMouseData>(); + + dispatchData->Coalesce(aEvent, aGuid, aInputBlockId); + mToBeDispatchedMouseData.Push(dispatchData.release()); + + ProcessPendingCoalescedMouseDataAndDispatchEvents(); + return IPC_OK(); + } + HandleRealMouseButtonEvent(aEvent, aGuid, aInputBlockId); + return IPC_OK(); +} + +void BrowserChild::HandleRealMouseButtonEvent(const WidgetMouseEvent& aEvent, + const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + WidgetMouseEvent localEvent(aEvent); + localEvent.mWidget = mPuppetWidget; + + // We need one InputAPZContext here to propagate |aGuid| to places in + // SendSetTargetAPZCNotification() which apply the visual-to-layout transform, + // and another below to propagate the |postLayerization| flag (whose value + // we don't know until SendSetTargetAPZCNotification() returns) into + // the event dispatch code. + InputAPZContext context1(aGuid, aInputBlockId, nsEventStatus_eSentinel); + + // Mouse events like eMouseEnterIntoWidget, that are created in the parent + // process EventStateManager code, have an input block id which they get from + // the InputAPZContext in the parent process stack. However, they did not + // actually go through the APZ code and so their mHandledByAPZ flag is false. + // Since thos events didn't go through APZ, we don't need to send + // notifications for them. + RefPtr<DisplayportSetListener> postLayerization; + if (aInputBlockId && localEvent.mFlags.mHandledByAPZ) { + nsCOMPtr<Document> document(GetTopLevelDocument()); + postLayerization = APZCCallbackHelper::SendSetTargetAPZCNotification( + mPuppetWidget, document, localEvent, aGuid.mLayersId, aInputBlockId); + } + + InputAPZContext context2(aGuid, aInputBlockId, nsEventStatus_eSentinel, + postLayerization != nullptr); + + DispatchWidgetEventViaAPZ(localEvent); + + if (aInputBlockId && localEvent.mFlags.mHandledByAPZ) { + mAPZEventState->ProcessMouseEvent(localEvent, aInputBlockId); + } + + // Do this after the DispatchWidgetEventViaAPZ call above, so that if the + // mouse event triggered a post-refresh AsyncDragMetrics message to be sent + // to APZ (from scrollbar dragging in nsSliderFrame), then that will reach + // APZ before the SetTargetAPZC message. This ensures the drag input block + // gets the drag metrics before handling the input events. + if (postLayerization) { + postLayerization->Register(); + } +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityRealMouseButtonEvent( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + return RecvRealMouseButtonEvent(aEvent, aGuid, aInputBlockId); +} + +mozilla::ipc::IPCResult BrowserChild::RecvRealMouseEnterExitWidgetEvent( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + return RecvRealMouseButtonEvent(aEvent, aGuid, aInputBlockId); +} + +mozilla::ipc::IPCResult +BrowserChild::RecvNormalPriorityRealMouseEnterExitWidgetEvent( + const WidgetMouseEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + return RecvRealMouseButtonEvent(aEvent, aGuid, aInputBlockId); +} + +nsEventStatus BrowserChild::DispatchWidgetEventViaAPZ(WidgetGUIEvent& aEvent) { + aEvent.ResetWaitingReplyFromRemoteProcessState(); + return APZCCallbackHelper::DispatchWidgetEvent(aEvent); +} + +void BrowserChild::DispatchCoalescedWheelEvent() { + UniquePtr<WidgetWheelEvent> wheelEvent = + mCoalescedWheelData.TakeCoalescedEvent(); + MOZ_ASSERT(wheelEvent); + DispatchWheelEvent(*wheelEvent, mCoalescedWheelData.GetScrollableLayerGuid(), + mCoalescedWheelData.GetInputBlockId()); +} + +void BrowserChild::DispatchWheelEvent(const WidgetWheelEvent& aEvent, + const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + WidgetWheelEvent localEvent(aEvent); + if (aInputBlockId && aEvent.mFlags.mHandledByAPZ) { + nsCOMPtr<Document> document(GetTopLevelDocument()); + RefPtr<DisplayportSetListener> postLayerization = + APZCCallbackHelper::SendSetTargetAPZCNotification( + mPuppetWidget, document, aEvent, aGuid.mLayersId, aInputBlockId); + if (postLayerization) { + postLayerization->Register(); + } + } + + localEvent.mWidget = mPuppetWidget; + + // Stash the guid in InputAPZContext so that when the visual-to-layout + // transform is applied to the event's coordinates, we use the right transform + // based on the scroll frame being targeted. + // The other values don't really matter. + InputAPZContext context(aGuid, aInputBlockId, nsEventStatus_eSentinel); + + DispatchWidgetEventViaAPZ(localEvent); + + if (localEvent.mCanTriggerSwipe) { + SendRespondStartSwipeEvent(aInputBlockId, localEvent.TriggersSwipe()); + } + + if (aInputBlockId && aEvent.mFlags.mHandledByAPZ) { + mAPZEventState->ProcessWheelEvent(localEvent, aInputBlockId); + } +} + +mozilla::ipc::IPCResult BrowserChild::RecvMouseWheelEvent( + const WidgetWheelEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + bool isNextWheelEvent = false; + // We only coalesce the current event when + // 1. It's eWheel (we don't coalesce eOperationStart and eWheelOperationEnd) + // 2. It has same attributes as the coalesced wheel event which is not yet + // fired. + if (aEvent.mMessage == eWheel) { + GetIPCChannel()->PeekMessages( + [&isNextWheelEvent](const IPC::Message& aMsg) -> bool { + if (aMsg.type() == mozilla::dom::PBrowser::Msg_MouseWheelEvent__ID) { + isNextWheelEvent = true; + } + return false; // Stop peeking. + }); + + if (!mCoalescedWheelData.IsEmpty() && + !mCoalescedWheelData.CanCoalesce(aEvent, aGuid, aInputBlockId)) { + DispatchCoalescedWheelEvent(); + MOZ_ASSERT(mCoalescedWheelData.IsEmpty()); + } + mCoalescedWheelData.Coalesce(aEvent, aGuid, aInputBlockId); + + MOZ_ASSERT(!mCoalescedWheelData.IsEmpty()); + // If the next event isn't a wheel event, make sure we dispatch. + if (!isNextWheelEvent) { + DispatchCoalescedWheelEvent(); + } + } else { + DispatchWheelEvent(aEvent, aGuid, aInputBlockId); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityMouseWheelEvent( + const WidgetWheelEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId) { + return RecvMouseWheelEvent(aEvent, aGuid, aInputBlockId); +} + +mozilla::ipc::IPCResult BrowserChild::RecvRealTouchEvent( + const WidgetTouchEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId, const nsEventStatus& aApzResponse) { + MOZ_LOG(sApzChildLog, LogLevel::Debug, + ("Receiving touch event of type %d\n", aEvent.mMessage)); + + if (StaticPrefs::dom_events_coalesce_touchmove()) { + if (aEvent.mMessage == eTouchEnd || aEvent.mMessage == eTouchStart) { + ProcessPendingCoalescedTouchData(); + } + + if (aEvent.mMessage != eTouchMove) { + sConsecutiveTouchMoveCount = 0; + } + } + + WidgetTouchEvent localEvent(aEvent); + localEvent.mWidget = mPuppetWidget; + + // Stash the guid in InputAPZContext so that when the visual-to-layout + // transform is applied to the event's coordinates, we use the right transform + // based on the scroll frame being targeted. + // The other values don't really matter. + InputAPZContext context(aGuid, aInputBlockId, aApzResponse); + + nsTArray<TouchBehaviorFlags> allowedTouchBehaviors; + if (localEvent.mMessage == eTouchStart && AsyncPanZoomEnabled()) { + nsCOMPtr<Document> document = GetTopLevelDocument(); + allowedTouchBehaviors = TouchActionHelper::GetAllowedTouchBehavior( + mPuppetWidget, document, localEvent); + if (!allowedTouchBehaviors.IsEmpty() && mApzcTreeManager) { + mApzcTreeManager->SetAllowedTouchBehavior(aInputBlockId, + allowedTouchBehaviors); + } + RefPtr<DisplayportSetListener> postLayerization = + APZCCallbackHelper::SendSetTargetAPZCNotification( + mPuppetWidget, document, localEvent, aGuid.mLayersId, + aInputBlockId); + if (postLayerization) { + postLayerization->Register(); + } + } + + // Dispatch event to content (potentially a long-running operation) + nsEventStatus status = DispatchWidgetEventViaAPZ(localEvent); + + if (!AsyncPanZoomEnabled()) { + // We shouldn't have any e10s platforms that have touch events enabled + // without APZ. + MOZ_ASSERT(false); + return IPC_OK(); + } + + mAPZEventState->ProcessTouchEvent(localEvent, aGuid, aInputBlockId, + aApzResponse, status, + std::move(allowedTouchBehaviors)); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityRealTouchEvent( + const WidgetTouchEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId, const nsEventStatus& aApzResponse) { + return RecvRealTouchEvent(aEvent, aGuid, aInputBlockId, aApzResponse); +} + +mozilla::ipc::IPCResult BrowserChild::RecvRealTouchMoveEvent( + const WidgetTouchEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId, const nsEventStatus& aApzResponse) { + if (StaticPrefs::dom_events_coalesce_touchmove()) { + ++sConsecutiveTouchMoveCount; + if (mCoalescedTouchMoveEventFlusher) { + MOZ_ASSERT(aEvent.mMessage == eTouchMove); + if (mCoalescedTouchData.IsEmpty() || + mCoalescedTouchData.CanCoalesce(aEvent, aGuid, aInputBlockId, + aApzResponse)) { + mCoalescedTouchData.Coalesce(aEvent, aGuid, aInputBlockId, + aApzResponse); + } else { + UniquePtr<WidgetTouchEvent> touchMoveEvent = + mCoalescedTouchData.TakeCoalescedEvent(); + + mCoalescedTouchData.Coalesce(aEvent, aGuid, aInputBlockId, + aApzResponse); + + if (!RecvRealTouchEvent(*touchMoveEvent, + mCoalescedTouchData.GetScrollableLayerGuid(), + mCoalescedTouchData.GetInputBlockId(), + mCoalescedTouchData.GetApzResponse())) { + return IPC_FAIL_NO_REASON(this); + } + } + + if (sConsecutiveTouchMoveCount > 1) { + mCoalescedTouchMoveEventFlusher->StartObserver(); + } else { + // Flush the pending coalesced touch in order to avoid the first + // touchmove be overridden by the second one. + ProcessPendingCoalescedTouchData(); + } + return IPC_OK(); + } + } + + if (!RecvRealTouchEvent(aEvent, aGuid, aInputBlockId, aApzResponse)) { + return IPC_FAIL_NO_REASON(this); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityRealTouchMoveEvent( + const WidgetTouchEvent& aEvent, const ScrollableLayerGuid& aGuid, + const uint64_t& aInputBlockId, const nsEventStatus& aApzResponse) { + return RecvRealTouchMoveEvent(aEvent, aGuid, aInputBlockId, aApzResponse); +} + +mozilla::ipc::IPCResult BrowserChild::RecvRealDragEvent( + const WidgetDragEvent& aEvent, const uint32_t& aDragAction, + const uint32_t& aDropEffect, nsIPrincipal* aPrincipal, + nsIContentSecurityPolicy* aCsp) { + WidgetDragEvent localEvent(aEvent); + localEvent.mWidget = mPuppetWidget; + + nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession(); + if (dragSession) { + dragSession->SetDragAction(aDragAction); + dragSession->SetTriggeringPrincipal(aPrincipal); + dragSession->SetCsp(aCsp); + RefPtr<DataTransfer> initialDataTransfer = dragSession->GetDataTransfer(); + if (initialDataTransfer) { + initialDataTransfer->SetDropEffectInt(aDropEffect); + } + } + + if (aEvent.mMessage == eDrop) { + bool canDrop = true; + if (!dragSession || NS_FAILED(dragSession->GetCanDrop(&canDrop)) || + !canDrop) { + localEvent.mMessage = eDragExit; + } + } else if (aEvent.mMessage == eDragOver) { + nsCOMPtr<nsIDragService> dragService = + do_GetService("@mozilla.org/widget/dragservice;1"); + if (dragService) { + // This will dispatch 'drag' event at the source if the + // drag transaction started in this process. + dragService->FireDragEventAtSource(eDrag, aEvent.mModifiers); + } + } + + DispatchWidgetEventViaAPZ(localEvent); + return IPC_OK(); +} + +void BrowserChild::RequestEditCommands(NativeKeyBindingsType aType, + const WidgetKeyboardEvent& aEvent, + nsTArray<CommandInt>& aCommands) { + MOZ_ASSERT(aCommands.IsEmpty()); + + if (NS_WARN_IF(aEvent.IsEditCommandsInitialized(aType))) { + aCommands = aEvent.EditCommandsConstRef(aType).Clone(); + return; + } + + switch (aType) { + case NativeKeyBindingsType::SingleLineEditor: + case NativeKeyBindingsType::MultiLineEditor: + case NativeKeyBindingsType::RichTextEditor: + break; + default: + MOZ_ASSERT_UNREACHABLE("Invalid native key bindings type"); + } + + // Don't send aEvent to the parent process directly because it'll be marked + // as posted to remote process. + WidgetKeyboardEvent localEvent(aEvent); + SendRequestNativeKeyBindings(static_cast<uint32_t>(aType), localEvent, + &aCommands); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNativeSynthesisResponse( + const uint64_t& aObserverId, const nsCString& aResponse) { + mozilla::widget::AutoObserverNotifier::NotifySavedObserver(aObserverId, + aResponse.get()); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvUpdateSHistory() { + if (mSessionStoreChild) { + mSessionStoreChild->UpdateSHistoryChanges(); + } + return IPC_OK(); +} + +// In case handling repeated keys takes much time, we skip firing new ones. +bool BrowserChild::SkipRepeatedKeyEvent(const WidgetKeyboardEvent& aEvent) { + if (mRepeatedKeyEventTime.IsNull() || !aEvent.CanSkipInRemoteProcess() || + (aEvent.mMessage != eKeyDown && aEvent.mMessage != eKeyPress)) { + mRepeatedKeyEventTime = TimeStamp(); + mSkipKeyPress = false; + return false; + } + + if ((aEvent.mMessage == eKeyDown && + (mRepeatedKeyEventTime > aEvent.mTimeStamp)) || + (mSkipKeyPress && (aEvent.mMessage == eKeyPress))) { + // If we skip a keydown event, also the following keypress events should be + // skipped. + mSkipKeyPress |= aEvent.mMessage == eKeyDown; + return true; + } + + if (aEvent.mMessage == eKeyDown) { + // If keydown wasn't skipped, nor should the possible following keypress. + mRepeatedKeyEventTime = TimeStamp(); + mSkipKeyPress = false; + } + return false; +} + +void BrowserChild::UpdateRepeatedKeyEventEndTime( + const WidgetKeyboardEvent& aEvent) { + if (aEvent.mIsRepeat && + (aEvent.mMessage == eKeyDown || aEvent.mMessage == eKeyPress)) { + mRepeatedKeyEventTime = TimeStamp::Now(); + } +} + +mozilla::ipc::IPCResult BrowserChild::RecvRealKeyEvent( + const WidgetKeyboardEvent& aEvent, const nsID& aUUID) { + MOZ_ASSERT_IF(aEvent.mMessage == eKeyPress, + aEvent.AreAllEditCommandsInitialized()); + + // If content code called preventDefault() on a keydown event, then we don't + // want to process any following keypress events. + const bool isPrecedingKeyDownEventConsumed = + aEvent.mMessage == eKeyPress && mIgnoreKeyPressEvent; + + WidgetKeyboardEvent localEvent(aEvent); + localEvent.mWidget = mPuppetWidget; + localEvent.mUniqueId = aEvent.mUniqueId; + + if (!SkipRepeatedKeyEvent(aEvent) && !isPrecedingKeyDownEventConsumed) { + nsEventStatus status = DispatchWidgetEventViaAPZ(localEvent); + + // Update the end time of the possible repeated event so that we can skip + // some incoming events in case event handling took long time. + UpdateRepeatedKeyEventEndTime(localEvent); + + if (aEvent.mMessage == eKeyDown) { + mIgnoreKeyPressEvent = status == nsEventStatus_eConsumeNoDefault; + } + + if (localEvent.mFlags.mIsSuppressedOrDelayed) { + localEvent.PreventDefault(); + } + + // If the event's default isn't prevented but the status is no default, + // That means that the event was consumed by EventStateManager or something + // which is not a usual event handler. In such case, prevent its default + // as a default handler. For example, when an eKeyPress event matches + // with a content accesskey, and it's executed, preventDefault() of the + // event won't be called but the status is set to "no default". Then, + // the event shouldn't be handled by nsMenuBarListener in the main process. + if (!localEvent.DefaultPrevented() && + status == nsEventStatus_eConsumeNoDefault) { + localEvent.PreventDefault(); + } + + MOZ_DIAGNOSTIC_ASSERT(!localEvent.PropagationStopped()); + } + // The keyboard event which we ignore should not be handled in the main + // process for shortcut key handling. For notifying if we skipped it, we can + // use "stop propagation" flag here because it must be cleared by + // `EventTargetChainItem` if we've dispatched it. + else { + localEvent.StopPropagation(); + } + + // If we don't need to send a rely for the given keyboard event, we do nothing + // anymore here. + if (!aEvent.WantReplyFromContentProcess()) { + return IPC_OK(); + } + + // This is an ugly hack, mNoRemoteProcessDispatch is set to true when the + // event's PreventDefault() or StopScrollProcessForwarding() is called. + // And then, it'll be checked by ParamTraits<mozilla::WidgetEvent>::Write() + // whether the event is being sent to remote process unexpectedly. + // However, unfortunately, it cannot check the destination. Therefore, + // we need to clear the flag explicitly here because ParamTraits should + // keep checking the flag for avoiding regression. + localEvent.mFlags.mNoRemoteProcessDispatch = false; + SendReplyKeyEvent(localEvent, aUUID); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityRealKeyEvent( + const WidgetKeyboardEvent& aEvent, const nsID& aUUID) { + return RecvRealKeyEvent(aEvent, aUUID); +} + +mozilla::ipc::IPCResult BrowserChild::RecvCompositionEvent( + const WidgetCompositionEvent& aEvent) { + WidgetCompositionEvent localEvent(aEvent); + localEvent.mWidget = mPuppetWidget; + DispatchWidgetEventViaAPZ(localEvent); + Unused << SendOnEventNeedingAckHandled(aEvent.mMessage); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityCompositionEvent( + const WidgetCompositionEvent& aEvent) { + return RecvCompositionEvent(aEvent); +} + +mozilla::ipc::IPCResult BrowserChild::RecvSelectionEvent( + const WidgetSelectionEvent& aEvent) { + WidgetSelectionEvent localEvent(aEvent); + localEvent.mWidget = mPuppetWidget; + DispatchWidgetEventViaAPZ(localEvent); + Unused << SendOnEventNeedingAckHandled(aEvent.mMessage); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPrioritySelectionEvent( + const WidgetSelectionEvent& aEvent) { + return RecvSelectionEvent(aEvent); +} + +mozilla::ipc::IPCResult BrowserChild::RecvInsertText( + const nsAString& aStringToInsert) { + // Use normal event path to reach focused document. + WidgetContentCommandEvent localEvent(true, eContentCommandInsertText, + mPuppetWidget); + localEvent.mString = Some(nsString(aStringToInsert)); + DispatchWidgetEventViaAPZ(localEvent); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNormalPriorityInsertText( + const nsAString& aStringToInsert) { + return RecvInsertText(aStringToInsert); +} + +mozilla::ipc::IPCResult BrowserChild::RecvPasteTransferable( + const IPCTransferableData& aTransferableData, const bool& aIsPrivateData, + nsIPrincipal* aRequestingPrincipal, + const nsContentPolicyType& aContentPolicyType) { + nsresult rv; + nsCOMPtr<nsITransferable> trans = + do_CreateInstance("@mozilla.org/widget/transferable;1", &rv); + NS_ENSURE_SUCCESS(rv, IPC_OK()); + trans->Init(nullptr); + + rv = nsContentUtils::IPCTransferableDataToTransferable( + aTransferableData, aIsPrivateData, aRequestingPrincipal, + aContentPolicyType, true /* aAddDataFlavor */, trans, + false /* aFilterUnknownFlavors */); + NS_ENSURE_SUCCESS(rv, IPC_OK()); + + nsCOMPtr<nsIDocShell> ourDocShell = do_GetInterface(WebNavigation()); + if (NS_WARN_IF(!ourDocShell)) { + return IPC_OK(); + } + + RefPtr<nsCommandParams> params = new nsCommandParams(); + rv = params->SetISupports("transferable", trans); + NS_ENSURE_SUCCESS(rv, IPC_OK()); + + ourDocShell->DoCommandWithParams("cmd_pasteTransferable", params); + return IPC_OK(); +} + +#ifdef ACCESSIBILITY +a11y::PDocAccessibleChild* BrowserChild::AllocPDocAccessibleChild( + PDocAccessibleChild*, const uint64_t&, + const MaybeDiscardedBrowsingContext&) { + MOZ_ASSERT(false, "should never call this!"); + return nullptr; +} + +bool BrowserChild::DeallocPDocAccessibleChild( + a11y::PDocAccessibleChild* aChild) { + delete static_cast<mozilla::a11y::DocAccessibleChild*>(aChild); + return true; +} +#endif + +RefPtr<VsyncMainChild> BrowserChild::GetVsyncChild() { + // Initializing mVsyncChild here turns on per-BrowserChild Vsync for a + // given platform. Note: this only makes sense if nsWindow returns a + // window-specific VsyncSource. +#if defined(MOZ_WAYLAND) + if (IsWaylandEnabled() && !mVsyncChild) { + mVsyncChild = MakeRefPtr<VsyncMainChild>(); + if (!SendPVsyncConstructor(mVsyncChild)) { + mVsyncChild = nullptr; + } + } +#endif + return mVsyncChild; +} + +mozilla::ipc::IPCResult BrowserChild::RecvLoadRemoteScript( + const nsAString& aURL, const bool& aRunInGlobalScope) { + if (!InitBrowserChildMessageManager()) + // This can happen if we're half-destroyed. It's not a fatal + // error. + return IPC_OK(); + + JS::Rooted<JSObject*> mm(RootingCx(), + mBrowserChildMessageManager->GetOrCreateWrapper()); + if (!mm) { + // This can happen if we're half-destroyed. It's not a fatal error. + return IPC_OK(); + } + + LoadScriptInternal(mm, aURL, !aRunInGlobalScope); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvAsyncMessage( + const nsAString& aMessage, const ClonedMessageData& aData) { + AUTO_PROFILER_LABEL_DYNAMIC_LOSSY_NSSTRING("BrowserChild::RecvAsyncMessage", + OTHER, aMessage); + MMPrinter::Print("BrowserChild::RecvAsyncMessage", aMessage, aData); + + if (!mBrowserChildMessageManager) { + return IPC_OK(); + } + + RefPtr<nsFrameMessageManager> mm = + mBrowserChildMessageManager->GetMessageManager(); + + // We should have a message manager if the global is alive, but it + // seems sometimes we don't. Assert in aurora/nightly, but don't + // crash in release builds. + MOZ_DIAGNOSTIC_ASSERT(mm); + if (!mm) { + return IPC_OK(); + } + + JS::Rooted<JSObject*> kungFuDeathGrip( + dom::RootingCx(), mBrowserChildMessageManager->GetWrapper()); + StructuredCloneData data; + UnpackClonedMessageData(aData, data); + mm->ReceiveMessage(static_cast<EventTarget*>(mBrowserChildMessageManager), + nullptr, aMessage, false, &data, nullptr, IgnoreErrors()); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvSwappedWithOtherRemoteLoader( + const IPCTabContext& aContext) { + nsCOMPtr<nsIDocShell> ourDocShell = do_GetInterface(WebNavigation()); + if (NS_WARN_IF(!ourDocShell)) { + return IPC_OK(); + } + + nsCOMPtr<nsPIDOMWindowOuter> ourWindow = ourDocShell->GetWindow(); + if (NS_WARN_IF(!ourWindow)) { + return IPC_OK(); + } + + RefPtr<nsDocShell> docShell = static_cast<nsDocShell*>(ourDocShell.get()); + + nsCOMPtr<EventTarget> ourEventTarget = nsGlobalWindowOuter::Cast(ourWindow); + + docShell->SetInFrameSwap(true); + + nsContentUtils::FirePageShowEventForFrameLoaderSwap( + ourDocShell, ourEventTarget, false, true); + nsContentUtils::FirePageHideEventForFrameLoaderSwap(ourDocShell, + ourEventTarget, true); + + // Owner content type may have changed, so store the possibly updated context + // and notify others. + MaybeInvalidTabContext maybeContext(aContext); + if (!maybeContext.IsValid()) { + NS_ERROR(nsPrintfCString("Received an invalid TabContext from " + "the parent process. (%s)", + maybeContext.GetInvalidReason()) + .get()); + MOZ_CRASH("Invalid TabContext received from the parent process."); + } + + if (!UpdateTabContextAfterSwap(maybeContext.GetTabContext())) { + MOZ_CRASH("Update to TabContext after swap was denied."); + } + + // Ignore previous value of mTriedBrowserInit since owner content has changed. + mTriedBrowserInit = true; + + nsContentUtils::FirePageShowEventForFrameLoaderSwap( + ourDocShell, ourEventTarget, true, true); + + docShell->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 = docShell->GetDocument()) { + doc->UpdateVisibilityState(); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvHandleAccessKey( + const WidgetKeyboardEvent& aEvent, nsTArray<uint32_t>&& aCharCodes) { + nsCOMPtr<Document> document(GetTopLevelDocument()); + RefPtr<nsPresContext> pc = document->GetPresContext(); + if (pc) { + if (!pc->EventStateManager()->HandleAccessKey( + &(const_cast<WidgetKeyboardEvent&>(aEvent)), pc, aCharCodes)) { + // If no accesskey was found, inform the parent so that accesskeys on + // menus can be handled. + WidgetKeyboardEvent localEvent(aEvent); + localEvent.mWidget = mPuppetWidget; + SendAccessKeyNotHandled(localEvent); + } + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvPrintPreview( + const PrintData& aPrintData, const MaybeDiscardedBrowsingContext& aSourceBC, + PrintPreviewResolver&& aCallback) { +#ifdef NS_PRINTING + // If we didn't succeed in passing off ownership of aCallback, then something + // went wrong. + auto sendCallbackError = MakeScopeExit([&] { + if (aCallback) { + // signal error + aCallback(PrintPreviewResultInfo(0, 0, false, false, false, {}, {}, {})); + } + }); + + if (NS_WARN_IF(aSourceBC.IsDiscarded())) { + return IPC_OK(); + } + + RefPtr<nsGlobalWindowOuter> sourceWindow; + if (!aSourceBC.IsNull()) { + sourceWindow = nsGlobalWindowOuter::Cast(aSourceBC.get()->GetDOMWindow()); + if (NS_WARN_IF(!sourceWindow)) { + return IPC_OK(); + } + } else { + nsCOMPtr<nsPIDOMWindowOuter> ourWindow = do_GetInterface(WebNavigation()); + if (NS_WARN_IF(!ourWindow)) { + return IPC_OK(); + } + sourceWindow = nsGlobalWindowOuter::Cast(ourWindow); + } + + RefPtr<nsIPrintSettings> printSettings; + nsCOMPtr<nsIPrintSettingsService> printSettingsSvc = + do_GetService("@mozilla.org/gfx/printsettings-service;1"); + if (NS_WARN_IF(!printSettingsSvc)) { + return IPC_OK(); + } + printSettingsSvc->CreateNewPrintSettings(getter_AddRefs(printSettings)); + if (NS_WARN_IF(!printSettings)) { + return IPC_OK(); + } + printSettingsSvc->DeserializeToPrintSettings(aPrintData, printSettings); + + nsCOMPtr<nsIDocShell> docShellToCloneInto; + if (!aSourceBC.IsNull()) { + docShellToCloneInto = do_GetInterface(WebNavigation()); + if (NS_WARN_IF(!docShellToCloneInto)) { + return IPC_OK(); + } + } + + sourceWindow->Print(printSettings, + /* aRemotePrintJob = */ nullptr, + /* aListener = */ nullptr, docShellToCloneInto, + nsGlobalWindowOuter::IsPreview::Yes, + nsGlobalWindowOuter::IsForWindowDotPrint::No, + std::move(aCallback), IgnoreErrors()); +#endif + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvExitPrintPreview() { +#ifdef NS_PRINTING + nsCOMPtr<nsIWebBrowserPrint> webBrowserPrint = + do_GetInterface(ToSupports(WebNavigation())); + if (NS_WARN_IF(!webBrowserPrint)) { + return IPC_OK(); + } + webBrowserPrint->ExitPrintPreview(); +#endif + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvPrint( + const MaybeDiscardedBrowsingContext& aBc, const PrintData& aPrintData) { +#ifdef NS_PRINTING + if (NS_WARN_IF(aBc.IsNullOrDiscarded())) { + return IPC_OK(); + } + RefPtr<nsGlobalWindowOuter> outerWindow = + nsGlobalWindowOuter::Cast(aBc.get()->GetDOMWindow()); + if (NS_WARN_IF(!outerWindow)) { + return IPC_OK(); + } + + nsCOMPtr<nsIPrintSettingsService> printSettingsSvc = + do_GetService("@mozilla.org/gfx/printsettings-service;1"); + if (NS_WARN_IF(!printSettingsSvc)) { + return IPC_OK(); + } + + nsCOMPtr<nsIPrintSettings> printSettings; + nsresult rv = + printSettingsSvc->CreateNewPrintSettings(getter_AddRefs(printSettings)); + if (NS_WARN_IF(NS_FAILED(rv))) { + return IPC_OK(); + } + + printSettingsSvc->DeserializeToPrintSettings(aPrintData, printSettings); + { + IgnoredErrorResult rv; + RefPtr printJob = static_cast<RemotePrintJobChild*>( + aPrintData.remotePrintJob().AsChild()); + outerWindow->Print(printSettings, printJob, + /* aListener = */ nullptr, + /* aWindowToCloneInto = */ nullptr, + nsGlobalWindowOuter::IsPreview::No, + nsGlobalWindowOuter::IsForWindowDotPrint::No, + /* aPrintPreviewCallback = */ nullptr, rv); + if (NS_WARN_IF(rv.Failed())) { + return IPC_OK(); + } + } +#endif + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvUpdateNativeWindowHandle( + const uintptr_t& aNewHandle) { +#if defined(XP_WIN) && defined(ACCESSIBILITY) + mNativeWindowHandle = aNewHandle; + return IPC_OK(); +#else + return IPC_FAIL_NO_REASON(this); +#endif +} + +mozilla::ipc::IPCResult BrowserChild::RecvDestroy() { + MOZ_ASSERT(mDestroyed == false); + mDestroyed = true; + + nsTArray<PContentPermissionRequestChild*> childArray = + nsContentPermissionUtils::GetContentPermissionRequestChildById( + GetTabId()); + + // Need to close undeleted ContentPermissionRequestChilds before tab is + // closed. + for (auto& permissionRequestChild : childArray) { + auto child = static_cast<RemotePermissionRequest*>(permissionRequestChild); + child->Destroy(); + } + + if (mBrowserChildMessageManager) { + // Message handlers are called from the event loop, so it better be safe to + // run script. + MOZ_ASSERT(nsContentUtils::IsSafeToRunScript()); + mBrowserChildMessageManager->DispatchTrustedEvent(u"unload"_ns); + } + + nsCOMPtr<nsIObserverService> observerService = + mozilla::services::GetObserverService(); + + observerService->RemoveObserver(this, BEFORE_FIRST_PAINT); + + // XXX what other code in ~BrowserChild() should we be running here? + DestroyWindow(); + + // Bounce through the event loop once to allow any delayed teardown runnables + // that were just generated to have a chance to run. + nsCOMPtr<nsIRunnable> deleteRunnable = new DelayedDeleteRunnable(this); + MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThread(deleteRunnable)); + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvRenderLayers( + const bool& aEnabled, const layers::LayersObserverEpoch& aEpoch) { + // Since requests to change the rendering state come in from both the hang + // monitor channel and the PContent channel, we have an ordering problem. This + // code ensures that we respect the order in which the requests were made and + // ignore stale requests. + if (mLayersObserverEpoch >= aEpoch) { + return IPC_OK(); + } + mLayersObserverEpoch = aEpoch; + + auto clearPaintWhileInterruptingJS = MakeScopeExit([&] { + // We might force a paint, or we might already have painted and this is a + // no-op. In either case, once we exit this scope, we need to alert the + // ProcessHangMonitor that we've finished responding to what might have + // been a request to force paint. This is so that the BackgroundHangMonitor + // for force painting can be made to wait again. + if (aEnabled) { + ProcessHangMonitor::ClearPaintWhileInterruptingJS(mLayersObserverEpoch); + } + }); + + if (aEnabled) { + ProcessHangMonitor::MaybeStartPaintWhileInterruptingJS(); + } + + if (mCompositorOptions) { + MOZ_ASSERT(mPuppetWidget); + RefPtr<WebRenderLayerManager> lm = + mPuppetWidget->GetWindowRenderer()->AsWebRender(); + if (lm) { + // We send the current layer observer epoch to the compositor so that + // BrowserParent knows whether a layer update notification corresponds to + // the latest RecvRenderLayers request that was made. + lm->SetLayersObserverEpoch(mLayersObserverEpoch); + } + } + + mRenderLayers = aEnabled; + + if (aEnabled && IsVisible()) { + // This request is a no-op. + // In this case, we still want a MozLayerTreeReady notification to fire + // in the parent (so that it knows that the child has updated its epoch). + // PaintWhileInterruptingJSNoOp does that. + if (IPCOpen()) { + Unused << SendPaintWhileInterruptingJSNoOp(mLayersObserverEpoch); + } + return IPC_OK(); + } + + // FIXME(emilio): Probably / maybe this shouldn't be needed? See the comment + // in MakeVisible(), having the two separate states is not great. + UpdateVisibility(); + + if (!aEnabled) { + return IPC_OK(); + } + + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + if (!docShell) { + return IPC_OK(); + } + + // We don't use BrowserChildBase::GetPresShell() here because that would + // create a content viewer if one doesn't exist yet. Creating a content + // viewer can cause JS to run, which we want to avoid. + // nsIDocShell::GetPresShell returns null if no content viewer exists yet. + RefPtr<PresShell> presShell = docShell->GetPresShell(); + if (!presShell) { + return IPC_OK(); + } + + if (nsIFrame* root = presShell->GetRootFrame()) { + root->SchedulePaint(); + } + + Telemetry::AutoTimer<Telemetry::TABCHILD_PAINT_TIME> timer; + // If we need to repaint, let's do that right away. No sense waiting until + // we get back to the event loop again. We suppress the display port so + // that we only paint what's visible. This ensures that the tab we're + // switching to paints as quickly as possible. + presShell->SuppressDisplayport(true); + if (nsContentUtils::IsSafeToRunScript()) { + WebWidget()->PaintNowIfNeeded(); + } else { + RefPtr<nsViewManager> vm = presShell->GetViewManager(); + if (nsView* view = vm->GetRootView()) { + presShell->PaintAndRequestComposite(view, PaintFlags::None); + } + } + presShell->SuppressDisplayport(false); + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvNavigateByKey( + const bool& aForward, const bool& aForDocumentNavigation) { + nsFocusManager* fm = nsFocusManager::GetFocusManager(); + if (!fm) { + return IPC_OK(); + } + + RefPtr<Element> result; + nsCOMPtr<nsPIDOMWindowOuter> window = do_GetInterface(WebNavigation()); + + // Move to the first or last document. + { + uint32_t type = + aForward + ? (aForDocumentNavigation + ? static_cast<uint32_t>(nsIFocusManager::MOVEFOCUS_FIRSTDOC) + : static_cast<uint32_t>(nsIFocusManager::MOVEFOCUS_ROOT)) + : (aForDocumentNavigation + ? static_cast<uint32_t>(nsIFocusManager::MOVEFOCUS_LASTDOC) + : static_cast<uint32_t>(nsIFocusManager::MOVEFOCUS_LAST)); + uint32_t flags = nsIFocusManager::FLAG_BYKEY; + if (aForward || aForDocumentNavigation) { + flags |= nsIFocusManager::FLAG_NOSCROLL; + } + fm->MoveFocus(window, nullptr, type, flags, getter_AddRefs(result)); + } + + // No valid root element was found, so move to the first focusable element. + if (!result && aForward && !aForDocumentNavigation) { + fm->MoveFocus(window, nullptr, nsIFocusManager::MOVEFOCUS_FIRST, + nsIFocusManager::FLAG_BYKEY, getter_AddRefs(result)); + } + + SendRequestFocus(false, CallerType::System); + return IPC_OK(); +} + +bool BrowserChild::InitBrowserChildMessageManager() { + mShouldSendWebProgressEventsToParent = true; + + if (!mBrowserChildMessageManager) { + nsCOMPtr<nsPIDOMWindowOuter> window = do_GetInterface(WebNavigation()); + NS_ENSURE_TRUE(window, false); + nsCOMPtr<EventTarget> chromeHandler = window->GetChromeEventHandler(); + NS_ENSURE_TRUE(chromeHandler, false); + + RefPtr<BrowserChildMessageManager> scope = mBrowserChildMessageManager = + new BrowserChildMessageManager(this); + + MOZ_ALWAYS_TRUE(nsMessageManagerScriptExecutor::Init()); + + nsCOMPtr<nsPIWindowRoot> root = do_QueryInterface(chromeHandler); + if (NS_WARN_IF(!root)) { + mBrowserChildMessageManager = nullptr; + return false; + } + root->SetParentTarget(scope); + } + + if (!mTriedBrowserInit) { + mTriedBrowserInit = true; + } + + return true; +} + +void BrowserChild::InitRenderingState( + const TextureFactoryIdentifier& aTextureFactoryIdentifier, + const layers::LayersId& aLayersId, + const CompositorOptions& aCompositorOptions) { + mPuppetWidget->InitIMEState(); + + MOZ_ASSERT(aLayersId.IsValid()); + mTextureFactoryIdentifier = aTextureFactoryIdentifier; + + // Pushing layers transactions directly to a separate + // compositor context. + PCompositorBridgeChild* compositorChild = CompositorBridgeChild::Get(); + if (!compositorChild) { + mLayersConnected = Some(false); + NS_WARNING("failed to get CompositorBridgeChild instance"); + return; + } + + mCompositorOptions = Some(aCompositorOptions); + + if (aLayersId.IsValid()) { + StaticMutexAutoLock lock(sBrowserChildrenMutex); + + if (!sBrowserChildren) { + sBrowserChildren = new BrowserChildMap; + } + MOZ_ASSERT(!sBrowserChildren->Contains(uint64_t(aLayersId))); + sBrowserChildren->InsertOrUpdate(uint64_t(aLayersId), this); + mLayersId = aLayersId; + } + + // Depending on timing, we might paint too early and fall back to basic + // layers. CreateRemoteLayerManager will destroy us if we manage to get a + // remote layer manager though, so that's fine. + MOZ_ASSERT(!mPuppetWidget->HasWindowRenderer() || + mPuppetWidget->GetWindowRenderer()->GetBackendType() == + layers::LayersBackend::LAYERS_NONE); + bool success = false; + if (mLayersConnected == Some(true)) { + success = CreateRemoteLayerManager(compositorChild); + } + + if (success) { + MOZ_ASSERT(mLayersConnected == Some(true)); + // Succeeded to create "remote" layer manager + ImageBridgeChild::IdentifyCompositorTextureHost(mTextureFactoryIdentifier); + gfx::VRManagerChild::IdentifyTextureHost(mTextureFactoryIdentifier); + InitAPZState(); + RefPtr<WebRenderLayerManager> lm = + mPuppetWidget->GetWindowRenderer()->AsWebRender(); + if (lm) { + lm->SetLayersObserverEpoch(mLayersObserverEpoch); + } + } else { + NS_WARNING("Fallback to FallbackRenderer"); + mLayersConnected = Some(false); + } + + nsCOMPtr<nsIObserverService> observerService = + mozilla::services::GetObserverService(); + + if (observerService) { + observerService->AddObserver(this, BEFORE_FIRST_PAINT, false); + } +} + +bool BrowserChild::CreateRemoteLayerManager( + mozilla::layers::PCompositorBridgeChild* aCompositorChild) { + MOZ_ASSERT(aCompositorChild); + + return mPuppetWidget->CreateRemoteLayerManager( + [&](WebRenderLayerManager* aLayerManager) -> bool { + nsCString error; + return aLayerManager->Initialize(aCompositorChild, + wr::AsPipelineId(mLayersId), + &mTextureFactoryIdentifier, error); + }); +} + +void BrowserChild::InitAPZState() { + if (!mCompositorOptions->UseAPZ()) { + return; + } + auto cbc = CompositorBridgeChild::Get(); + + // Initialize the ApzcTreeManager. This takes multiple casts because of ugly + // multiple inheritance. + PAPZCTreeManagerChild* baseProtocol = + cbc->SendPAPZCTreeManagerConstructor(mLayersId); + if (!baseProtocol) { + MOZ_ASSERT(false, + "Allocating a TreeManager should not fail with APZ enabled"); + return; + } + APZCTreeManagerChild* derivedProtocol = + static_cast<APZCTreeManagerChild*>(baseProtocol); + + mApzcTreeManager = RefPtr<IAPZCTreeManager>(derivedProtocol); + + // Initialize the GeckoContentController for this tab. We don't hold a + // reference because we don't need it. The ContentProcessController will hold + // a reference to the tab, and will be destroyed by the compositor or ipdl + // during destruction. + RefPtr<GeckoContentController> contentController = + new ContentProcessController(this); + APZChild* apzChild = new APZChild(contentController); + cbc->SendPAPZConstructor(apzChild, mLayersId); +} + +IPCResult BrowserChild::RecvUpdateEffects(const EffectsInfo& aEffects) { + mDidSetEffectsInfo = true; + + bool needInvalidate = false; + if (mEffectsInfo.IsVisible() && aEffects.IsVisible() && + mEffectsInfo != aEffects) { + // if we are staying visible and either the visrect or scale changed we need + // to invalidate + needInvalidate = true; + } + + mEffectsInfo = aEffects; + UpdateVisibility(); + + if (needInvalidate) { + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + if (docShell) { + // We don't use BrowserChildBase::GetPresShell() here because that would + // create a content viewer if one doesn't exist yet. Creating a content + // viewer can cause JS to run, which we want to avoid. + // nsIDocShell::GetPresShell returns null if no content viewer exists yet. + RefPtr<PresShell> presShell = docShell->GetPresShell(); + if (presShell) { + if (nsIFrame* root = presShell->GetRootFrame()) { + root->InvalidateFrame(); + } + } + } + } + + return IPC_OK(); +} + +bool BrowserChild::IsVisible() { + return mPuppetWidget && mPuppetWidget->IsVisible(); +} + +void BrowserChild::UpdateVisibility() { + bool shouldBeVisible = mIsTopLevel ? mRenderLayers : mEffectsInfo.IsVisible(); + bool isVisible = IsVisible(); + + if (shouldBeVisible != isVisible) { + if (shouldBeVisible) { + MakeVisible(); + } else { + MakeHidden(); + } + } +} + +void BrowserChild::MakeVisible() { + if (IsVisible()) { + return; + } + + if (mPuppetWidget) { + mPuppetWidget->Show(true); + } + + PresShellActivenessMaybeChanged(); +} + +void BrowserChild::MakeHidden() { + if (!IsVisible()) { + return; + } + + // Due to the nested event loop in ContentChild::ProvideWindowCommon, + // it's possible to be told to become hidden before we're finished + // setting up a layer manager. We should skip clearing cached layers + // in that case, since doing so might accidentally put is into + // BasicLayers mode. + if (mPuppetWidget) { + if (mPuppetWidget->HasWindowRenderer()) { + ClearCachedResources(); + } + mPuppetWidget->Show(false); + } + + PresShellActivenessMaybeChanged(); +} + +IPCResult BrowserChild::RecvPreserveLayers(bool aPreserve) { + mIsPreservingLayers = aPreserve; + + PresShellActivenessMaybeChanged(); + + return IPC_OK(); +} + +void BrowserChild::PresShellActivenessMaybeChanged() { + // We don't use BrowserChildBase::GetPresShell() here because that would + // create a content viewer if one doesn't exist yet. Creating a content + // viewer can cause JS to run, which we want to avoid. + // nsIDocShell::GetPresShell returns null if no content viewer exists yet. + // + // When this method is called we don't want to go through the browsing context + // because we don't want to change the visibility state of the document, which + // has side effects like firing events to content, unblocking media playback, + // unthrottling timeouts... PresShell activeness has a lot less side effects. + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + if (!docShell) { + return; + } + RefPtr<PresShell> presShell = docShell->GetPresShell(); + if (!presShell) { + return; + } + presShell->ActivenessMaybeChanged(); +} + +NS_IMETHODIMP +BrowserChild::GetMessageManager(ContentFrameMessageManager** aResult) { + RefPtr<ContentFrameMessageManager> mm(mBrowserChildMessageManager); + mm.forget(aResult); + return *aResult ? NS_OK : NS_ERROR_FAILURE; +} + +void BrowserChild::SendRequestFocus(bool aCanFocus, CallerType aCallerType) { + nsFocusManager* fm = nsFocusManager::GetFocusManager(); + if (!fm) { + return; + } + + nsCOMPtr<nsPIDOMWindowOuter> window = do_GetInterface(WebNavigation()); + if (!window) { + return; + } + + BrowsingContext* focusedBC = fm->GetFocusedBrowsingContext(); + if (focusedBC == window->GetBrowsingContext()) { + // BrowsingContext has the focus already, do not request again. + return; + } + + PBrowserChild::SendRequestFocus(aCanFocus, aCallerType); +} + +NS_IMETHODIMP +BrowserChild::GetTabId(uint64_t* aId) { + *aId = GetTabId(); + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::GetChromeOuterWindowID(uint64_t* aId) { + *aId = ChromeOuterWindowID(); + return NS_OK; +} + +bool BrowserChild::DoSendBlockingMessage( + const nsAString& aMessage, StructuredCloneData& aData, + nsTArray<StructuredCloneData>* aRetVal) { + ClonedMessageData data; + if (!BuildClonedMessageData(aData, data)) { + return false; + } + return SendSyncMessage(PromiseFlatString(aMessage), data, aRetVal); +} + +nsresult BrowserChild::DoSendAsyncMessage(const nsAString& aMessage, + StructuredCloneData& aData) { + ClonedMessageData data; + if (!BuildClonedMessageData(aData, data)) { + return NS_ERROR_DOM_DATA_CLONE_ERR; + } + if (!SendAsyncMessage(PromiseFlatString(aMessage), data)) { + return NS_ERROR_UNEXPECTED; + } + return NS_OK; +} + +/* static */ +nsTArray<RefPtr<BrowserChild>> BrowserChild::GetAll() { + StaticMutexAutoLock lock(sBrowserChildrenMutex); + + if (!sBrowserChildren) { + return {}; + } + + return ToTArray<nsTArray<RefPtr<BrowserChild>>>(sBrowserChildren->Values()); +} + +BrowserChild* BrowserChild::GetFrom(PresShell* aPresShell) { + Document* doc = aPresShell->GetDocument(); + if (!doc) { + return nullptr; + } + nsCOMPtr<nsIDocShell> docShell(doc->GetDocShell()); + return GetFrom(docShell); +} + +BrowserChild* BrowserChild::GetFrom(layers::LayersId aLayersId) { + StaticMutexAutoLock lock(sBrowserChildrenMutex); + if (!sBrowserChildren) { + return nullptr; + } + return sBrowserChildren->Get(uint64_t(aLayersId)); +} + +void BrowserChild::DidComposite(mozilla::layers::TransactionId aTransactionId, + const TimeStamp& aCompositeStart, + const TimeStamp& aCompositeEnd) { + MOZ_ASSERT(mPuppetWidget); + RefPtr<WebRenderLayerManager> lm = + mPuppetWidget->GetWindowRenderer()->AsWebRender(); + MOZ_ASSERT(lm); + + if (lm) { + lm->DidComposite(aTransactionId, aCompositeStart, aCompositeEnd); + } +} + +void BrowserChild::DidRequestComposite(const TimeStamp& aCompositeReqStart, + const TimeStamp& aCompositeReqEnd) { + nsCOMPtr<nsIDocShell> docShellComPtr = do_GetInterface(WebNavigation()); + if (!docShellComPtr) { + return; + } + + nsDocShell* docShell = static_cast<nsDocShell*>(docShellComPtr.get()); + + if (TimelineConsumers::HasConsumer(docShell)) { + // Since we're assuming that it's impossible for content JS to directly + // trigger a synchronous paint, we can avoid capturing a stack trace here, + // which means we won't run into JS engine reentrancy issues like bug + // 1310014. + TimelineConsumers::AddMarkerForDocShell( + docShell, "CompositeForwardTransaction", aCompositeReqStart, + MarkerTracingType::START, MarkerStackRequest::NO_STACK); + TimelineConsumers::AddMarkerForDocShell( + docShell, "CompositeForwardTransaction", aCompositeReqEnd, + MarkerTracingType::END, MarkerStackRequest::NO_STACK); + } +} + +void BrowserChild::ClearCachedResources() { + MOZ_ASSERT(mPuppetWidget); + RefPtr<WebRenderLayerManager> lm = + mPuppetWidget->GetWindowRenderer()->AsWebRender(); + if (lm) { + lm->ClearCachedResources(); + } + + if (nsCOMPtr<Document> document = GetTopLevelDocument()) { + nsPresContext* presContext = document->GetPresContext(); + if (presContext) { + presContext->NotifyPaintStatusReset(); + } + } +} + +void BrowserChild::SchedulePaint() { + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + if (!docShell) { + return; + } + + // We don't use BrowserChildBase::GetPresShell() here because that would + // create a content viewer if one doesn't exist yet. Creating a content viewer + // can cause JS to run, which we want to avoid. nsIDocShell::GetPresShell + // returns null if no content viewer exists yet. + if (RefPtr<PresShell> presShell = docShell->GetPresShell()) { + if (nsIFrame* root = presShell->GetRootFrame()) { + root->SchedulePaint(); + } + } +} + +void BrowserChild::ReinitRendering() { + MOZ_ASSERT(mLayersId.IsValid()); + + // In some cases, like when we create a windowless browser, + // RemoteLayerTreeOwner/BrowserChild is not connected to a compositor. + if (mLayersConnectRequested.isNothing() || + mLayersConnectRequested == Some(false)) { + return; + } + + // Before we establish a new PLayerTransaction, we must connect our layer tree + // id, CompositorBridge, and the widget compositor all together again. + // Normally this happens in BrowserParent before BrowserChild is given + // rendering information. + // + // In this case, we will send a sync message to our BrowserParent, which in + // turn will send a sync message to the Compositor of the widget owning this + // tab. This guarantees the correct association is in place before our + // PLayerTransaction constructor message arrives on the cross-process + // compositor bridge. + CompositorOptions options; + SendEnsureLayersConnected(&options); + mCompositorOptions = Some(options); + + bool success = false; + RefPtr<CompositorBridgeChild> cb = CompositorBridgeChild::Get(); + + if (cb) { + success = CreateRemoteLayerManager(cb); + } + + if (!success) { + NS_WARNING("failed to recreate layer manager"); + return; + } + + mLayersConnected = Some(true); + ImageBridgeChild::IdentifyCompositorTextureHost(mTextureFactoryIdentifier); + gfx::VRManagerChild::IdentifyTextureHost(mTextureFactoryIdentifier); + + InitAPZState(); + RefPtr<WebRenderLayerManager> lm = + mPuppetWidget->GetWindowRenderer()->AsWebRender(); + if (lm) { + lm->SetLayersObserverEpoch(mLayersObserverEpoch); + } + + if (nsCOMPtr<Document> doc = GetTopLevelDocument()) { + doc->NotifyLayerManagerRecreated(); + } + + if (mRenderLayers) { + SchedulePaint(); + } +} + +void BrowserChild::ReinitRenderingForDeviceReset() { + RefPtr<WebRenderLayerManager> lm = + mPuppetWidget->GetWindowRenderer()->AsWebRender(); + if (lm) { + lm->DoDestroy(/* aIsSync */ true); + } + + // Proceed with destroying and recreating the layer manager. + ReinitRendering(); +} + +NS_IMETHODIMP +BrowserChild::OnShowTooltip(int32_t aXCoords, int32_t aYCoords, + const nsAString& aTipText, + const nsAString& aTipDir) { + nsString str(aTipText); + nsString dir(aTipDir); + SendShowTooltip(aXCoords, aYCoords, str, dir); + return NS_OK; +} + +NS_IMETHODIMP +BrowserChild::OnHideTooltip() { + SendHideTooltip(); + return NS_OK; +} + +void BrowserChild::NotifyJankedAnimations( + const nsTArray<uint64_t>& aJankedAnimations) { + MOZ_ASSERT(mPuppetWidget); + RefPtr<WebRenderLayerManager> lm = + mPuppetWidget->GetWindowRenderer()->AsWebRender(); + if (lm) { + lm->UpdatePartialPrerenderedAnimations(aJankedAnimations); + } +} + +mozilla::ipc::IPCResult BrowserChild::RecvUIResolutionChanged( + const float& aDpi, const int32_t& aRounding, const double& aScale) { + ScreenIntSize oldScreenSize = GetInnerSize(); + if (aDpi > 0) { + mPuppetWidget->UpdateBackingScaleCache(aDpi, aRounding, aScale); + } + + ScreenIntSize screenSize = GetInnerSize(); + if (mHasValidInnerSize && oldScreenSize != screenSize) { + ScreenIntRect screenRect = GetOuterRect(); + + // See RecvUpdateDimensions for the order of these operations. + nsCOMPtr<nsIBaseWindow> baseWin = do_QueryInterface(WebNavigation()); + baseWin->SetPositionAndSize(0, 0, screenSize.width, screenSize.height, + nsIBaseWindow::eRepaint); + + mPuppetWidget->Resize(screenRect.x + mClientOffset.x + mChromeOffset.x, + screenRect.y + mClientOffset.y + mChromeOffset.y, + screenSize.width, screenSize.height, true); + } + + nsCOMPtr<Document> document(GetTopLevelDocument()); + RefPtr<nsPresContext> presContext = + document ? document->GetPresContext() : nullptr; + if (presContext) { + presContext->UIResolutionChangedSync(); + } + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvSafeAreaInsetsChanged( + const mozilla::ScreenIntMargin& aSafeAreaInsets) { + mPuppetWidget->UpdateSafeAreaInsets(aSafeAreaInsets); + + nsCOMPtr<nsIScreenManager> screenMgr = + do_GetService("@mozilla.org/gfx/screenmanager;1"); + ScreenIntMargin currentSafeAreaInsets; + if (screenMgr) { + // aSafeAreaInsets is for current screen. But we have to calculate + // safe insets for content window. + int32_t x, y, cx, cy; + GetDimensions(DimensionKind::Outer, &x, &y, &cx, &cy); + nsCOMPtr<nsIScreen> screen; + screenMgr->ScreenForRect(x, y, cx, cy, getter_AddRefs(screen)); + + if (screen) { + LayoutDeviceIntRect windowRect(x + mClientOffset.x + mChromeOffset.x, + y + mClientOffset.y + mChromeOffset.y, cx, + cy); + currentSafeAreaInsets = nsContentUtils::GetWindowSafeAreaInsets( + screen, aSafeAreaInsets, windowRect); + } + } + + if (nsCOMPtr<Document> document = GetTopLevelDocument()) { + nsPresContext* presContext = document->GetPresContext(); + if (presContext) { + presContext->SetSafeAreaInsets(currentSafeAreaInsets); + } + } + + // https://github.com/w3c/csswg-drafts/issues/4670 + // Actually we don't set this value on sub document. This behaviour is + // same as Blink that safe area insets isn't set on sub document. + + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvAllowScriptsToClose() { + nsCOMPtr<nsPIDOMWindowOuter> window = do_GetInterface(WebNavigation()); + if (window) { + nsGlobalWindowOuter::Cast(window)->AllowScriptsToClose(); + } + return IPC_OK(); +} + +mozilla::ipc::IPCResult BrowserChild::RecvReleaseAllPointerCapture() { + PointerEventHandler::ReleaseAllPointerCapture(); + return IPC_OK(); +} + +PPaymentRequestChild* BrowserChild::AllocPPaymentRequestChild() { + MOZ_CRASH( + "We should never be manually allocating PPaymentRequestChild actors"); + return nullptr; +} + +bool BrowserChild::DeallocPPaymentRequestChild(PPaymentRequestChild* actor) { + delete actor; + return true; +} + +ScreenIntSize BrowserChild::GetInnerSize() { + LayoutDeviceIntSize innerSize = + RoundedToInt(mUnscaledInnerSize * mPuppetWidget->GetDefaultScale()); + return ViewAs<ScreenPixel>( + innerSize, PixelCastJustification::LayoutDeviceIsScreenForTabDims); +}; + +Maybe<nsRect> BrowserChild::GetVisibleRect() const { + if (mIsTopLevel) { + // We are conservative about visible rects for top-level browsers to avoid + // artifacts when resizing + return Nothing(); + } + + return mDidSetEffectsInfo ? Some(mEffectsInfo.mVisibleRect) : Nothing(); +} + +Maybe<LayoutDeviceRect> +BrowserChild::GetTopLevelViewportVisibleRectInSelfCoords() const { + if (mIsTopLevel) { + return Nothing(); + } + + if (!mChildToParentConversionMatrix) { + // We have no way to tell this remote document visible rect right now. + return Nothing(); + } + + Maybe<LayoutDeviceToLayoutDeviceMatrix4x4> inverse = + mChildToParentConversionMatrix->MaybeInverse(); + if (!inverse) { + return Nothing(); + } + + // Convert the remote document visible rect to the coordinate system of the + // iframe document. + Maybe<LayoutDeviceRect> rect = UntransformBy( + *inverse, + ViewAs<LayoutDevicePixel>( + mTopLevelViewportVisibleRectInBrowserCoords, + PixelCastJustification::ContentProcessIsLayerInUiProcess), + LayoutDeviceRect::MaxIntRect()); + if (!rect) { + return Nothing(); + } + + return rect; +} + +ScreenIntRect BrowserChild::GetOuterRect() { + LayoutDeviceIntRect outerRect = + RoundedToInt(mUnscaledOuterRect * mPuppetWidget->GetDefaultScale()); + return ViewAs<ScreenPixel>( + outerRect, PixelCastJustification::LayoutDeviceIsScreenForTabDims); +} + +void BrowserChild::PaintWhileInterruptingJS( + const layers::LayersObserverEpoch& aEpoch) { + if (!IPCOpen() || !mPuppetWidget || !mPuppetWidget->HasWindowRenderer()) { + // Don't bother doing anything now. Better to wait until we receive the + // message on the PContent channel. + return; + } + + MOZ_DIAGNOSTIC_ASSERT(nsContentUtils::IsSafeToRunScript()); + nsAutoScriptBlocker scriptBlocker; + RecvRenderLayers(true /* aEnabled */, aEpoch); +} + +void BrowserChild::UnloadLayersWhileInterruptingJS( + const layers::LayersObserverEpoch& aEpoch) { + if (!IPCOpen() || !mPuppetWidget || !mPuppetWidget->HasWindowRenderer()) { + // Don't bother doing anything now. Better to wait until we receive the + // message on the PContent channel. + return; + } + + MOZ_DIAGNOSTIC_ASSERT(nsContentUtils::IsSafeToRunScript()); + nsAutoScriptBlocker scriptBlocker; + RecvRenderLayers(false /* aEnabled */, aEpoch); +} + +nsresult BrowserChild::CanCancelContentJS( + nsIRemoteTab::NavigationType aNavigationType, int32_t aNavigationIndex, + nsIURI* aNavigationURI, int32_t aEpoch, bool* aCanCancel) { + nsresult rv; + *aCanCancel = false; + + if (aEpoch <= mCancelContentJSEpoch) { + // The next page loaded before we got here, so we shouldn't try to cancel + // the content JS. + return NS_OK; + } + + // If we have session history in the parent we've already performed + // the checks following, so we can return early. + if (mozilla::SessionHistoryInParent()) { + *aCanCancel = true; + return NS_OK; + } + + nsCOMPtr<nsIDocShell> docShell = do_GetInterface(WebNavigation()); + nsCOMPtr<nsISHistory> history; + if (docShell) { + history = nsDocShell::Cast(docShell)->GetSessionHistory()->LegacySHistory(); + } + + if (!history) { + return NS_ERROR_FAILURE; + } + + int32_t current; + rv = history->GetIndex(¤t); + NS_ENSURE_SUCCESS(rv, rv); + + if (current == -1) { + // This tab has no history! Just return. + return NS_OK; + } + + nsCOMPtr<nsISHEntry> entry; + rv = history->GetEntryAtIndex(current, getter_AddRefs(entry)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIURI> currentURI = entry->GetURI(); + if (!currentURI->SchemeIs("http") && !currentURI->SchemeIs("https") && + !currentURI->SchemeIs("file")) { + // Only cancel content JS for http(s) and file URIs. Other URIs are probably + // internal and we should just let them run to completion. + return NS_OK; + } + + if (aNavigationType == nsIRemoteTab::NAVIGATE_BACK) { + aNavigationIndex = current - 1; + } else if (aNavigationType == nsIRemoteTab::NAVIGATE_FORWARD) { + aNavigationIndex = current + 1; + } else if (aNavigationType == nsIRemoteTab::NAVIGATE_URL) { + if (!aNavigationURI) { + return NS_ERROR_FAILURE; + } + + if (aNavigationURI->SchemeIs("javascript")) { + // "javascript:" URIs don't (necessarily) trigger navigation to a + // different page, so don't allow the current page's JS to terminate. + return NS_OK; + } + + // If navigating directly to a URL (e.g. via hitting Enter in the location + // bar), then we can cancel anytime the next URL is different from the + // current, *excluding* the ref ("#"). + bool equals; + rv = currentURI->EqualsExceptRef(aNavigationURI, &equals); + NS_ENSURE_SUCCESS(rv, rv); + *aCanCancel = !equals; + return NS_OK; + } + // Note: aNavigationType may also be NAVIGATE_INDEX, in which case we don't + // need to do anything special. + + int32_t delta = aNavigationIndex > current ? 1 : -1; + for (int32_t i = current + delta; i != aNavigationIndex + delta; i += delta) { + nsCOMPtr<nsISHEntry> nextEntry; + // If `i` happens to be negative, this call will fail (which is what we + // would want to happen). + rv = history->GetEntryAtIndex(i, getter_AddRefs(nextEntry)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsISHEntry> laterEntry = delta == 1 ? nextEntry : entry; + nsCOMPtr<nsIURI> thisURI = entry->GetURI(); + nsCOMPtr<nsIURI> nextURI = nextEntry->GetURI(); + + // If we changed origin and the load wasn't in a subframe, we know it was + // a full document load, so we can cancel the content JS safely. + if (!laterEntry->GetIsSubFrame()) { + nsAutoCString thisHost; + rv = thisURI->GetPrePath(thisHost); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString nextHost; + rv = nextURI->GetPrePath(nextHost); + NS_ENSURE_SUCCESS(rv, rv); + + if (!thisHost.Equals(nextHost)) { + *aCanCancel = true; + return NS_OK; + } + } + + entry = nextEntry; + } + + return NS_OK; +} + +NS_IMETHODIMP BrowserChild::OnStateChange(nsIWebProgress* aWebProgress, + nsIRequest* aRequest, + uint32_t aStateFlags, + nsresult aStatus) { + if (!IPCOpen() || !mShouldSendWebProgressEventsToParent) { + return NS_OK; + } + + // We shouldn't need to notify the parent of redirect state changes, since + // with DocumentChannel that only happens when we switch to the real channel, + // and that's an implementation detail that we can hide. + if (aStateFlags & nsIWebProgressListener::STATE_IS_REDIRECTED_DOCUMENT) { + return NS_OK; + } + + // Our OnStateChange call must have provided the nsIDocShell which the source + // comes from. We'll use this to locate the corresponding BrowsingContext in + // the parent process. + nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(aWebProgress); + if (!docShell) { + MOZ_ASSERT_UNREACHABLE("aWebProgress is null or not a nsIDocShell?"); + return NS_ERROR_UNEXPECTED; + } + + WebProgressData webProgressData; + Maybe<WebProgressStateChangeData> stateChangeData; + RequestData requestData; + + MOZ_TRY(PrepareProgressListenerData(aWebProgress, aRequest, webProgressData, + requestData)); + + RefPtr<BrowsingContext> browsingContext = docShell->GetBrowsingContext(); + if (browsingContext->IsTopContent()) { + stateChangeData.emplace(); + + stateChangeData->isNavigating() = docShell->GetIsNavigating(); + stateChangeData->mayEnableCharacterEncodingMenu() = + docShell->GetMayEnableCharacterEncodingMenu(); + + RefPtr<Document> document = browsingContext->GetExtantDocument(); + if (document && aStateFlags & nsIWebProgressListener::STATE_STOP) { + document->GetContentType(stateChangeData->contentType()); + document->GetCharacterSet(stateChangeData->charset()); + stateChangeData->documentURI() = document->GetDocumentURIObject(); + } else { + stateChangeData->contentType().SetIsVoid(true); + stateChangeData->charset().SetIsVoid(true); + } + } + + Unused << SendOnStateChange(webProgressData, requestData, aStateFlags, + aStatus, stateChangeData); + + return NS_OK; +} + +NS_IMETHODIMP BrowserChild::OnProgressChange(nsIWebProgress* aWebProgress, + nsIRequest* aRequest, + int32_t aCurSelfProgress, + int32_t aMaxSelfProgress, + int32_t aCurTotalProgress, + int32_t aMaxTotalProgress) { + if (!IPCOpen() || !mShouldSendWebProgressEventsToParent) { + return NS_OK; + } + + // FIXME: We currently ignore ProgressChange events from out-of-process + // subframes both here and in BrowserParent. We may want to change this + // behaviour in the future. + if (!GetBrowsingContext()->IsTopContent()) { + return NS_OK; + } + + // As we're being filtered by nsBrowserStatusFilter, we will be passed either + // nullptr or 0 for all arguments other than aCurTotalProgress and + // aMaxTotalProgress. Don't bother sending them. + MOZ_ASSERT(!aWebProgress); + MOZ_ASSERT(!aRequest); + MOZ_ASSERT(aCurSelfProgress == 0); + MOZ_ASSERT(aMaxSelfProgress == 0); + + Unused << SendOnProgressChange(aCurTotalProgress, aMaxTotalProgress); + + return NS_OK; +} + +NS_IMETHODIMP BrowserChild::OnLocationChange(nsIWebProgress* aWebProgress, + nsIRequest* aRequest, + nsIURI* aLocation, + uint32_t aFlags) { + if (!IPCOpen() || !mShouldSendWebProgressEventsToParent) { + return NS_OK; + } + + nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(aWebProgress); + if (!docShell) { + MOZ_ASSERT_UNREACHABLE("aWebProgress is null or not a nsIDocShell?"); + return NS_ERROR_UNEXPECTED; + } + + RefPtr<BrowsingContext> browsingContext = docShell->GetBrowsingContext(); + RefPtr<Document> document = browsingContext->GetExtantDocument(); + if (!document) { + return NS_OK; + } + + WebProgressData webProgressData; + RequestData requestData; + + MOZ_TRY(PrepareProgressListenerData(aWebProgress, aRequest, webProgressData, + requestData)); + + Maybe<WebProgressLocationChangeData> locationChangeData; + + bool canGoBack = false; + bool canGoForward = false; + if (!mozilla::SessionHistoryInParent()) { + MOZ_TRY(WebNavigation()->GetCanGoBack(&canGoBack)); + MOZ_TRY(WebNavigation()->GetCanGoForward(&canGoForward)); + } + + if (browsingContext->IsTopContent()) { + MOZ_ASSERT( + browsingContext == GetBrowsingContext(), + "Toplevel content BrowsingContext which isn't GetBrowsingContext()?"); + + locationChangeData.emplace(); + + document->GetContentType(locationChangeData->contentType()); + locationChangeData->isNavigating() = docShell->GetIsNavigating(); + locationChangeData->documentURI() = document->GetDocumentURIObject(); + document->GetTitle(locationChangeData->title()); + document->GetCharacterSet(locationChangeData->charset()); + + locationChangeData->mayEnableCharacterEncodingMenu() = + docShell->GetMayEnableCharacterEncodingMenu(); + + locationChangeData->contentPrincipal() = document->NodePrincipal(); + locationChangeData->contentPartitionedPrincipal() = + document->PartitionedPrincipal(); + locationChangeData->csp() = document->GetCsp(); + locationChangeData->referrerInfo() = document->ReferrerInfo(); + locationChangeData->isSyntheticDocument() = document->IsSyntheticDocument(); + + if (nsCOMPtr<nsILoadGroup> loadGroup = document->GetDocumentLoadGroup()) { + uint64_t requestContextID = 0; + MOZ_TRY(loadGroup->GetRequestContextID(&requestContextID)); + locationChangeData->requestContextID() = Some(requestContextID); + } + +#ifdef MOZ_CRASHREPORTER + if (CrashReporter::GetEnabled()) { + nsCOMPtr<nsIURI> annotationURI; + + nsresult rv = + NS_MutateURI(aLocation).SetUserPass(""_ns).Finalize(annotationURI); + + if (NS_FAILED(rv)) { + // Ignore failures on about: URIs. + annotationURI = aLocation; + } + + CrashReporter::AnnotateCrashReport(CrashReporter::Annotation::URL, + annotationURI->GetSpecOrDefault()); + } +#endif + } + + Unused << SendOnLocationChange(webProgressData, requestData, aLocation, + aFlags, canGoBack, canGoForward, + locationChangeData); + + return NS_OK; +} + +NS_IMETHODIMP BrowserChild::OnStatusChange(nsIWebProgress* aWebProgress, + nsIRequest* aRequest, + nsresult aStatus, + const char16_t* aMessage) { + if (!IPCOpen() || !mShouldSendWebProgressEventsToParent) { + return NS_OK; + } + + // FIXME: We currently ignore StatusChange from out-of-process subframes both + // here and in BrowserParent. We may want to change this behaviour in the + // future. + if (!GetBrowsingContext()->IsTopContent()) { + return NS_OK; + } + + // As we're being filtered by nsBrowserStatusFilter, we will be passed either + // nullptr or NS_OK for all arguments other than aMessage. Don't bother + // sending them. + MOZ_ASSERT(!aWebProgress); + MOZ_ASSERT(!aRequest); + MOZ_ASSERT(aStatus == NS_OK); + + Unused << SendOnStatusChange(nsDependentString(aMessage)); + + return NS_OK; +} + +NS_IMETHODIMP BrowserChild::OnSecurityChange(nsIWebProgress* aWebProgress, + nsIRequest* aRequest, + uint32_t aState) { + // Security changes are now handled entirely in the parent process + // so we don't need to worry about forwarding them (and we shouldn't + // be receiving any to forward). + return NS_OK; +} + +NS_IMETHODIMP BrowserChild::OnContentBlockingEvent(nsIWebProgress* aWebProgress, + nsIRequest* aRequest, + uint32_t aEvent) { + // The OnContentBlockingEvent only happenes in the parent process. It should + // not be seen in the content process. + MOZ_DIAGNOSTIC_ASSERT( + false, "OnContentBlockingEvent should not be seen in content process."); + return NS_ERROR_NOT_IMPLEMENTED; +} + +NS_IMETHODIMP BrowserChild::OnProgressChange64(nsIWebProgress* aWebProgress, + nsIRequest* aRequest, + int64_t aCurSelfProgress, + int64_t aMaxSelfProgress, + int64_t aCurTotalProgress, + int64_t aMaxTotalProgress) { + // All the events we receive are filtered through an nsBrowserStatusFilter, + // which accepts ProgressChange64 events, but truncates the progress values to + // uint32_t and calls OnProgressChange. + return NS_ERROR_NOT_IMPLEMENTED; +} + +NS_IMETHODIMP BrowserChild::OnRefreshAttempted(nsIWebProgress* aWebProgress, + nsIURI* aRefreshURI, + uint32_t aMillis, bool aSameURI, + bool* aOut) { + NS_ENSURE_ARG_POINTER(aOut); + *aOut = true; + + return NS_OK; +} + +NS_IMETHODIMP BrowserChild::NotifyNavigationFinished() { + Unused << SendNavigationFinished(); + return NS_OK; +} + +nsresult BrowserChild::PrepareRequestData(nsIRequest* aRequest, + RequestData& aRequestData) { + nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest); + if (!channel) { + aRequestData.requestURI() = nullptr; + return NS_OK; + } + + nsresult rv = channel->GetURI(getter_AddRefs(aRequestData.requestURI())); + NS_ENSURE_SUCCESS(rv, rv); + + rv = channel->GetOriginalURI( + getter_AddRefs(aRequestData.originalRequestURI())); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIClassifiedChannel> classifiedChannel = do_QueryInterface(channel); + if (classifiedChannel) { + rv = classifiedChannel->GetMatchedList(aRequestData.matchedList()); + NS_ENSURE_SUCCESS(rv, rv); + } + return NS_OK; +} + +nsresult BrowserChild::PrepareProgressListenerData( + nsIWebProgress* aWebProgress, nsIRequest* aRequest, + WebProgressData& aWebProgressData, RequestData& aRequestData) { + nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(aWebProgress); + if (!docShell) { + MOZ_ASSERT_UNREACHABLE("aWebProgress is null or not a nsIDocShell?"); + return NS_ERROR_UNEXPECTED; + } + + aWebProgressData.browsingContext() = docShell->GetBrowsingContext(); + nsresult rv = aWebProgress->GetLoadType(&aWebProgressData.loadType()); + NS_ENSURE_SUCCESS(rv, rv); + + return PrepareRequestData(aRequest, aRequestData); +} + +void BrowserChild::UpdateSessionStore() { + if (mSessionStoreChild) { + mSessionStoreChild->UpdateSessionStore(); + } +} + +#ifdef XP_WIN +RefPtr<PBrowserChild::IsWindowSupportingProtectedMediaPromise> +BrowserChild::DoesWindowSupportProtectedMedia() { + MOZ_ASSERT( + NS_IsMainThread(), + "Protected media support check should be done on main thread only."); + if (mWindowSupportsProtectedMedia) { + // If we've already checked and have a cached result, resolve with that. + return IsWindowSupportingProtectedMediaPromise::CreateAndResolve( + mWindowSupportsProtectedMedia.value(), __func__); + } + RefPtr<BrowserChild> self = this; + // We chain off the promise rather than passing it directly so we can cache + // the result and use that for future calls. + return SendIsWindowSupportingProtectedMedia(ChromeOuterWindowID()) + ->Then( + GetCurrentSerialEventTarget(), __func__, + [self](bool isSupported) { + // If a result was cached while this check was inflight, ensure the + // results match. + MOZ_ASSERT_IF( + self->mWindowSupportsProtectedMedia, + self->mWindowSupportsProtectedMedia.value() == isSupported); + // Cache the response as it will not change during the lifetime + // of this object. + self->mWindowSupportsProtectedMedia = Some(isSupported); + return IsWindowSupportingProtectedMediaPromise::CreateAndResolve( + self->mWindowSupportsProtectedMedia.value(), __func__); + }, + [](ResponseRejectReason reason) { + return IsWindowSupportingProtectedMediaPromise::CreateAndReject( + reason, __func__); + }); +} +#endif + +void BrowserChild::NotifyContentBlockingEvent( + uint32_t aEvent, nsIChannel* aChannel, bool aBlocked, + const nsACString& aTrackingOrigin, + const nsTArray<nsCString>& aTrackingFullHashes, + const Maybe< + mozilla::ContentBlockingNotifier::StorageAccessPermissionGrantedReason>& + aReason) { + if (!IPCOpen()) { + return; + } + + RequestData requestData; + if (NS_SUCCEEDED(PrepareRequestData(aChannel, requestData))) { + Unused << SendNotifyContentBlockingEvent( + aEvent, requestData, aBlocked, PromiseFlatCString(aTrackingOrigin), + aTrackingFullHashes, aReason); + } +} + +NS_IMETHODIMP +BrowserChild::ContentTransformsReceived(JSContext* aCx, + dom::Promise** aPromise) { + auto* globalObject = xpc::CurrentNativeGlobal(aCx); + ErrorResult rv; + if (mChildToParentConversionMatrix) { + // Already received content transforms + RefPtr<Promise> promise = + Promise::CreateResolvedWithUndefined(globalObject, rv); + promise.forget(aPromise); + return rv.StealNSResult(); + } + + if (!mContentTransformPromise) { + mContentTransformPromise = Promise::Create(globalObject, rv); + } + + MOZ_ASSERT(globalObject == mContentTransformPromise->GetGlobalObject()); + NS_IF_ADDREF(*aPromise = mContentTransformPromise); + return rv.StealNSResult(); +} + +BrowserChildMessageManager::BrowserChildMessageManager( + BrowserChild* aBrowserChild) + : ContentFrameMessageManager(new nsFrameMessageManager(aBrowserChild)), + mBrowserChild(aBrowserChild) {} + +BrowserChildMessageManager::~BrowserChildMessageManager() = default; + +NS_IMPL_CYCLE_COLLECTION_CLASS(BrowserChildMessageManager) + +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(BrowserChildMessageManager, + DOMEventTargetHelper) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mMessageManager); + NS_IMPL_CYCLE_COLLECTION_UNLINK(mBrowserChild); + NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_REFERENCE +NS_IMPL_CYCLE_COLLECTION_UNLINK_END + +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(BrowserChildMessageManager, + DOMEventTargetHelper) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMessageManager) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBrowserChild) +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(BrowserChildMessageManager) + NS_INTERFACE_MAP_ENTRY(nsIMessageSender) + NS_INTERFACE_MAP_ENTRY_CONCRETE(ContentFrameMessageManager) + NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference) +NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper) + +NS_IMPL_ADDREF_INHERITED(BrowserChildMessageManager, DOMEventTargetHelper) +NS_IMPL_RELEASE_INHERITED(BrowserChildMessageManager, DOMEventTargetHelper) + +JSObject* BrowserChildMessageManager::WrapObject( + JSContext* aCx, JS::Handle<JSObject*> aGivenProto) { + return ContentFrameMessageManager_Binding::Wrap(aCx, this, aGivenProto); +} + +void BrowserChildMessageManager::MarkForCC() { + if (mBrowserChild) { + mBrowserChild->MarkScopesForCC(); + } + EventListenerManager* elm = GetExistingListenerManager(); + if (elm) { + elm->MarkForCC(); + } + MessageManagerGlobal::MarkForCC(); +} + +Nullable<WindowProxyHolder> BrowserChildMessageManager::GetContent( + ErrorResult& aError) { + nsCOMPtr<nsIDocShell> docShell = GetDocShell(aError); + if (!docShell) { + return nullptr; + } + return WindowProxyHolder(docShell->GetBrowsingContext()); +} + +already_AddRefed<nsIDocShell> BrowserChildMessageManager::GetDocShell( + ErrorResult& aError) { + if (!mBrowserChild) { + aError.Throw(NS_ERROR_NULL_POINTER); + return nullptr; + } + nsCOMPtr<nsIDocShell> window = + do_GetInterface(mBrowserChild->WebNavigation()); + return window.forget(); +} + +already_AddRefed<nsIEventTarget> +BrowserChildMessageManager::GetTabEventTarget() { + nsCOMPtr<nsIEventTarget> target = EventTargetFor(TaskCategory::Other); + return target.forget(); +} + +nsresult BrowserChildMessageManager::Dispatch( + TaskCategory aCategory, already_AddRefed<nsIRunnable>&& aRunnable) { + return DispatcherTrait::Dispatch(aCategory, std::move(aRunnable)); +} + +nsISerialEventTarget* BrowserChildMessageManager::EventTargetFor( + TaskCategory aCategory) const { + return DispatcherTrait::EventTargetFor(aCategory); +} + +AbstractThread* BrowserChildMessageManager::AbstractMainThreadFor( + TaskCategory aCategory) { + return DispatcherTrait::AbstractMainThreadFor(aCategory); +} |