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/* -*- Mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
/* 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
#include "nsAppShell.h"
#include "base/basictypes.h"
#include "base/message_loop.h"
#include "base/task.h"
#include "mozilla/Hal.h"
#include "gfxConfig.h"
#include "nsDragService.h"
#include "nsExceptionHandler.h"
#include "nsIScreen.h"
#include "nsWindow.h"
#include "nsThreadUtils.h"
#include "nsIObserverService.h"
#include "nsIAppStartup.h"
#include "nsIGeolocationProvider.h"
#include "nsIDOMWakeLockListener.h"
#include "nsIPowerManagerService.h"
#include "nsISpeculativeConnect.h"
#include "nsIURIFixup.h"
#include "nsCategoryManagerUtils.h"
#include "mozilla/dom/GeolocationPosition.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/AppShutdown.h"
#include "mozilla/Components.h"
#include "mozilla/Services.h"
#include "mozilla/Preferences.h"
#include "mozilla/ProfilerLabels.h"
#include "mozilla/Hal.h"
#include "mozilla/dom/BrowserChild.h"
#include "mozilla/dom/Document.h"
#include "mozilla/intl/OSPreferences.h"
#include "mozilla/ipc/GeckoChildProcessHost.h"
#include "mozilla/java/GeckoAppShellNatives.h"
#include "mozilla/java/GeckoDragAndDropNatives.h"
#include "mozilla/java/GeckoResultWrappers.h"
#include "mozilla/java/GeckoThreadNatives.h"
#include "mozilla/java/XPCOMEventTargetNatives.h"
#include "mozilla/widget/ScreenManager.h"
#include "prenv.h"
#include "prtime.h"
#include "AndroidBridge.h"
#include "AndroidBridgeUtilities.h"
#include "AndroidSurfaceTexture.h"
#include <android/log.h>
#include <pthread.h>
#include <wchar.h>
#ifdef MOZ_ANDROID_HISTORY
# include "nsNetUtil.h"
# include "nsIURI.h"
# include "IHistory.h"
#endif
#ifdef MOZ_LOGGING
# include "mozilla/Logging.h"
#endif
#include "AndroidAlerts.h"
#include "AndroidUiThread.h"
#include "GeckoBatteryManager.h"
#include "GeckoEditableSupport.h"
#include "GeckoNetworkManager.h"
#include "GeckoProcessManager.h"
#include "GeckoSystemStateListener.h"
#include "GeckoVRManager.h"
#include "ImageDecoderSupport.h"
#include "JavaBuiltins.h"
#include "ScreenHelperAndroid.h"
#include "Telemetry.h"
#include "WebExecutorSupport.h"
#include "Base64UtilsSupport.h"
#ifdef DEBUG_ANDROID_EVENTS
# define EVLOG(args...) ALOG(args)
#else
# define EVLOG(args...) \
do { \
} while (0)
#endif
using namespace mozilla;
using namespace mozilla::widget;
nsIGeolocationUpdate* gLocationCallback = nullptr;
nsAppShell* nsAppShell::sAppShell;
StaticAutoPtr<Mutex> nsAppShell::sAppShellLock;
NS_IMPL_ISUPPORTS_INHERITED(nsAppShell, nsBaseAppShell, nsIObserver)
class WakeLockListener final : public nsIDOMMozWakeLockListener {
private:
~WakeLockListener() {}
public:
NS_DECL_ISUPPORTS;
nsresult Callback(const nsAString& topic, const nsAString& state) override {
java::GeckoAppShell::NotifyWakeLockChanged(topic, state);
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(WakeLockListener, nsIDOMMozWakeLockListener)
nsCOMPtr<nsIPowerManagerService> sPowerManagerService = nullptr;
StaticRefPtr<WakeLockListener> sWakeLockListener;
class GeckoThreadSupport final
: public java::GeckoThread::Natives<GeckoThreadSupport> {
// When this number goes above 0, the app is paused. When less than or
// equal to zero, the app is resumed.
static int32_t sPauseCount;
public:
static void SpeculativeConnect(jni::String::Param aUriStr) {
if (!NS_IsMainThread()) {
// We will be on the main thread if the call was queued on the Java
// side during startup. Otherwise, the call was not queued, which
// means Gecko is already sufficiently loaded, and we don't really
// care about speculative connections at this point.
return;
}
nsCOMPtr<nsIIOService> ioServ = do_GetIOService();
nsCOMPtr<nsISpeculativeConnect> specConn = do_QueryInterface(ioServ);
if (!specConn) {
return;
}
nsCOMPtr<nsIURI> uri = nsAppShell::ResolveURI(aUriStr->ToCString());
if (!uri) {
return;
}
OriginAttributes attrs;
nsCOMPtr<nsIPrincipal> principal =
BasePrincipal::CreateContentPrincipal(uri, attrs);
specConn->SpeculativeConnect(uri, principal, nullptr, false);
}
static void OnPause() {
MOZ_ASSERT(NS_IsMainThread());
sPauseCount++;
// If sPauseCount is now 1, we just crossed the threshold from "resumed"
// "paused". so we should notify observers and so on.
if (sPauseCount != 1) {
return;
}
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
obsServ->NotifyObservers(nullptr, "application-background", nullptr);
obsServ->NotifyObservers(nullptr, "memory-pressure", u"heap-minimize");
// We really want to send a notification like profile-before-change,
// but profile-before-change ends up shutting some things down instead
// of flushing data
Preferences* prefs = static_cast<Preferences*>(Preferences::GetService());
if (prefs) {
// Force a main thread blocking save
prefs->SavePrefFileBlocking();
}
}
static void OnResume() {
MOZ_ASSERT(NS_IsMainThread());
sPauseCount--;
// If sPauseCount is now 0, we just crossed the threshold from "paused"
// to "resumed", so we should notify observers and so on.
if (sPauseCount != 0) {
return;
}
// We didn't return from one of our own activities, so restore
// to foreground status
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
obsServ->NotifyObservers(nullptr, "application-foreground", nullptr);
}
static void CreateServices(jni::String::Param aCategory,
jni::String::Param aData) {
MOZ_ASSERT(NS_IsMainThread());
nsCString category(aCategory->ToCString());
NS_CreateServicesFromCategory(category.get(),
nullptr, // aOrigin
category.get(),
aData ? aData->ToString().get() : nullptr);
}
static int64_t RunUiThreadCallback() { return RunAndroidUiTasks(); }
static void ForceQuit() {
nsCOMPtr<nsIAppStartup> appStartup = components::AppStartup::Service();
if (appStartup) {
bool userAllowedQuit = true;
appStartup->Quit(nsIAppStartup::eForceQuit, 0, &userAllowedQuit);
}
}
static void Crash() {
printf_stderr("Intentionally crashing...\n");
MOZ_CRASH("intentional crash");
}
};
int32_t GeckoThreadSupport::sPauseCount;
class GeckoAppShellSupport final
: public java::GeckoAppShell::Natives<GeckoAppShellSupport> {
public:
static void ReportJavaCrash(const jni::Class::LocalRef& aCls,
jni::Throwable::Param aException,
jni::String::Param aStack) {
if (!jni::ReportException(aCls.Env(), aException.Get(), aStack.Get())) {
// Only crash below if crash reporter is initialized and annotation
// succeeded. Otherwise try other means of reporting the crash in
// Java.
return;
}
MOZ_CRASH("Uncaught Java exception");
}
static void NotifyObservers(jni::String::Param aTopic,
jni::String::Param aData) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aTopic);
nsCOMPtr<nsIObserverService> obsServ = services::GetObserverService();
if (!obsServ) {
return;
}
obsServ->NotifyObservers(nullptr, aTopic->ToCString().get(),
aData ? aData->ToString().get() : nullptr);
}
static void AppendAppNotesToCrashReport(jni::String::Param aNotes) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aNotes);
CrashReporter::AppendAppNotesToCrashReport(aNotes->ToCString());
}
static void OnSensorChanged(int32_t aType, float aX, float aY, float aZ,
float aW, int64_t aTime) {
AutoTArray<float, 4> values;
switch (aType) {
// spec, ex: HAL report alpha=90 means East but alpha=90 means West
// in w3c spec
case hal::SENSOR_ORIENTATION:
values.AppendElement(360.0f - aX);
values.AppendElement(-aY);
values.AppendElement(-aZ);
break;
case hal::SENSOR_LINEAR_ACCELERATION:
case hal::SENSOR_ACCELERATION:
case hal::SENSOR_GYROSCOPE:
values.AppendElement(aX);
values.AppendElement(aY);
values.AppendElement(aZ);
break;
case hal::SENSOR_LIGHT:
values.AppendElement(aX);
break;
case hal::SENSOR_ROTATION_VECTOR:
case hal::SENSOR_GAME_ROTATION_VECTOR:
values.AppendElement(aX);
values.AppendElement(aY);
values.AppendElement(aZ);
values.AppendElement(aW);
break;
default:
__android_log_print(ANDROID_LOG_ERROR, "Gecko",
"Unknown sensor type %d", aType);
}
hal::SensorData sdata(hal::SensorType(aType), aTime, values);
hal::NotifySensorChange(sdata);
}
static void OnLocationChanged(double aLatitude, double aLongitude,
double aAltitude, float aAccuracy,
float aAltitudeAccuracy, float aHeading,
float aSpeed) {
if (!gLocationCallback) {
return;
}
static constexpr float kEpsilon = 0.0001f;
double heading = (aHeading >= kEpsilon && aHeading < (360.0f - kEpsilon) &&
aSpeed > kEpsilon)
? aHeading
: UnspecifiedNaN<double>();
RefPtr<nsIDOMGeoPosition> geoPosition(new nsGeoPosition(
aLatitude, aLongitude, aAltitude, aAccuracy, aAltitudeAccuracy, heading,
aSpeed, PR_Now() / PR_USEC_PER_MSEC));
gLocationCallback->Update(geoPosition);
}
static void NotifyAlertListener(jni::String::Param aName,
jni::String::Param aTopic,
jni::String::Param aCookie) {
if (!aName || !aTopic || !aCookie) {
return;
}
widget::AndroidAlerts::NotifyListener(aName->ToString(),
aTopic->ToCString().get(),
aCookie->ToString().get());
}
static bool IsParentProcess() { return XRE_IsParentProcess(); }
static jni::Object::LocalRef IsGpuProcessEnabled() {
java::GeckoResult::GlobalRef result = java::GeckoResult::New();
NS_DispatchToMainThread(NS_NewRunnableFunction(
"GeckoAppShellSupport::IsGpuProcessEnabled", [result]() {
result->Complete(gfx::gfxConfig::IsEnabled(gfx::Feature::GPU_PROCESS)
? java::sdk::Boolean::TRUE()
: java::sdk::Boolean::FALSE());
}));
return jni::Object::Ref::From(result);
}
};
class XPCOMEventTargetWrapper final
: public java::XPCOMEventTarget::Natives<XPCOMEventTargetWrapper> {
public:
// Wraps a java runnable into an XPCOM runnable and dispatches it to mTarget.
void DispatchNative(mozilla::jni::Object::Param aJavaRunnable) {
if (AppShutdown::GetCurrentShutdownPhase() >=
ShutdownPhase::XPCOMShutdownThreads) {
// No point in trying to dispatch this if we're already shutting down.
return;
}
java::XPCOMEventTarget::JNIRunnable::GlobalRef r =
java::XPCOMEventTarget::JNIRunnable::Ref::From(aJavaRunnable);
mTarget->Dispatch(NS_NewRunnableFunction(
"XPCOMEventTargetWrapper::DispatchNative",
[runnable = std::move(r)]() { runnable->Run(); }));
}
bool IsOnCurrentThread() { return mTarget->IsOnCurrentThread(); }
static void Init() {
java::XPCOMEventTarget::Natives<XPCOMEventTargetWrapper>::Init();
CreateWrapper(u"main"_ns, do_GetMainThread());
if (XRE_IsParentProcess()) {
CreateWrapper(u"launcher"_ns, ipc::GetIPCLauncher());
}
}
static void CreateWrapper(mozilla::jni::String::Param aName,
nsCOMPtr<nsIEventTarget> aTarget) {
auto java = java::XPCOMEventTarget::New();
auto native = MakeUnique<XPCOMEventTargetWrapper>(aTarget.forget());
AttachNative(java, std::move(native));
java::XPCOMEventTarget::SetTarget(aName, java);
}
static void ResolveAndDispatchNative(mozilla::jni::String::Param aName,
mozilla::jni::Object::Param aRunnable) {
java::XPCOMEventTarget::ResolveAndDispatch(aName, aRunnable);
}
explicit XPCOMEventTargetWrapper(already_AddRefed<nsIEventTarget> aTarget)
: mTarget(aTarget) {}
private:
nsCOMPtr<nsIEventTarget> mTarget;
};
nsAppShell::nsAppShell()
: mSyncRunFinished(*(sAppShellLock = new Mutex("nsAppShell")),
"nsAppShell.SyncRun"),
mSyncRunQuit(false) {
{
MutexAutoLock lock(*sAppShellLock);
sAppShell = this;
}
hal::Init();
if (!XRE_IsParentProcess()) {
if (jni::IsAvailable()) {
GeckoThreadSupport::Init();
GeckoAppShellSupport::Init();
XPCOMEventTargetWrapper::Init();
mozilla::widget::Telemetry::Init();
if (XRE_IsGPUProcess()) {
mozilla::gl::AndroidSurfaceTexture::Init();
}
// Set the corresponding state in GeckoThread.
java::GeckoThread::SetState(java::GeckoThread::State::RUNNING());
}
return;
}
if (jni::IsAvailable()) {
ScreenManager& screenManager = ScreenManager::GetSingleton();
screenManager.SetHelper(mozilla::MakeUnique<ScreenHelperAndroid>());
// Initialize JNI and Set the corresponding state in GeckoThread.
AndroidBridge::ConstructBridge();
GeckoAppShellSupport::Init();
GeckoThreadSupport::Init();
XPCOMEventTargetWrapper::Init();
mozilla::GeckoBatteryManager::Init();
mozilla::GeckoNetworkManager::Init();
mozilla::GeckoProcessManager::Init();
mozilla::GeckoSystemStateListener::Init();
mozilla::widget::Telemetry::Init();
mozilla::widget::ImageDecoderSupport::Init();
mozilla::widget::WebExecutorSupport::Init();
mozilla::widget::Base64UtilsSupport::Init();
nsWindow::InitNatives();
mozilla::gl::AndroidSurfaceTexture::Init();
java::GeckoThread::SetState(java::GeckoThread::State::JNI_READY());
CreateAndroidUiThread();
}
sPowerManagerService = do_GetService(POWERMANAGERSERVICE_CONTRACTID);
if (sPowerManagerService) {
sWakeLockListener = new WakeLockListener();
} else {
NS_WARNING(
"Failed to retrieve PowerManagerService, wakelocks will be broken!");
}
}
nsAppShell::~nsAppShell() {
{
// Release any thread waiting for a sync call to finish.
MutexAutoLock lock(*sAppShellLock);
sAppShell = nullptr;
mSyncRunFinished.NotifyAll();
}
while (mEventQueue.Pop(/* mayWait */ false)) {
NS_WARNING("Discarded event on shutdown");
}
if (sPowerManagerService) {
sPowerManagerService->RemoveWakeLockListener(sWakeLockListener);
sPowerManagerService = nullptr;
sWakeLockListener = nullptr;
}
hal::Shutdown();
if (jni::IsAvailable() && XRE_IsParentProcess()) {
DestroyAndroidUiThread();
AndroidBridge::DeconstructBridge();
}
}
void nsAppShell::NotifyNativeEvent() { mEventQueue.Signal(); }
nsresult nsAppShell::Init() {
nsresult rv = nsBaseAppShell::Init();
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
if (obsServ) {
obsServ->AddObserver(this, "browser-delayed-startup-finished", false);
obsServ->AddObserver(this, "geckoview-startup-complete", false);
obsServ->AddObserver(this, "profile-after-change", false);
obsServ->AddObserver(this, "quit-application", false);
obsServ->AddObserver(this, "quit-application-granted", false);
if (XRE_IsParentProcess()) {
obsServ->AddObserver(this, "chrome-document-loaded", false);
} else {
obsServ->AddObserver(this, "content-document-global-created", false);
obsServ->AddObserver(this, "geckoview-content-global-transferred", false);
}
}
if (sPowerManagerService)
sPowerManagerService->AddWakeLockListener(sWakeLockListener);
return rv;
}
NS_IMETHODIMP
nsAppShell::Exit(void) {
{
// Release any thread waiting for a sync call to finish.
mozilla::MutexAutoLock shellLock(*sAppShellLock);
mSyncRunQuit = true;
mSyncRunFinished.NotifyAll();
}
// We need to ensure no observers stick around after XPCOM shuts down
// or we'll see crashes, as the app shell outlives XPConnect.
mObserversHash.Clear();
return nsBaseAppShell::Exit();
}
NS_IMETHODIMP
nsAppShell::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
bool removeObserver = false;
if (!strcmp(aTopic, "browser-delayed-startup-finished")) {
NS_CreateServicesFromCategory("browser-delayed-startup-finished", nullptr,
"browser-delayed-startup-finished");
} else if (!strcmp(aTopic, "geckoview-startup-complete")) {
if (jni::IsAvailable()) {
java::GeckoThread::CheckAndSetState(
java::GeckoThread::State::PROFILE_READY(),
java::GeckoThread::State::RUNNING());
}
} else if (!strcmp(aTopic, "profile-after-change")) {
if (jni::IsAvailable()) {
java::GeckoThread::SetState(java::GeckoThread::State::PROFILE_READY());
// Gecko on Android follows the Android app model where it never
// stops until it is killed by the system or told explicitly to
// quit. Therefore, we should *not* exit Gecko when there is no
// window or the last window is closed. nsIAppStartup::Quit will
// still force Gecko to exit.
nsCOMPtr<nsIAppStartup> appStartup = components::AppStartup::Service();
if (appStartup) {
appStartup->EnterLastWindowClosingSurvivalArea();
}
}
removeObserver = true;
} else if (!strcmp(aTopic, "chrome-document-loaded")) {
// Set the global ready state and enable the window event dispatcher
// for this particular GeckoView.
nsCOMPtr<dom::Document> doc = do_QueryInterface(aSubject);
MOZ_ASSERT(doc);
if (const RefPtr<nsWindow> window = nsWindow::From(doc->GetWindow())) {
window->OnGeckoViewReady();
}
} else if (!strcmp(aTopic, "quit-application")) {
if (jni::IsAvailable()) {
const bool restarting = aData && u"restart"_ns.Equals(aData);
java::GeckoThread::SetState(restarting
? java::GeckoThread::State::RESTARTING()
: java::GeckoThread::State::EXITING());
}
removeObserver = true;
} else if (!strcmp(aTopic, "quit-application-granted")) {
if (jni::IsAvailable()) {
// We are told explicitly to quit, perhaps due to
// nsIAppStartup::Quit being called. We should release our hold on
// nsIAppStartup and let it continue to quit.
nsCOMPtr<nsIAppStartup> appStartup = components::AppStartup::Service();
if (appStartup) {
appStartup->ExitLastWindowClosingSurvivalArea();
}
}
removeObserver = true;
} else if (!strcmp(aTopic, "content-document-global-created")) {
// Associate the PuppetWidget of the newly-created BrowserChild with a
// GeckoEditableChild instance.
MOZ_ASSERT(!XRE_IsParentProcess());
nsCOMPtr<mozIDOMWindowProxy> domWindow = do_QueryInterface(aSubject);
MOZ_ASSERT(domWindow);
nsCOMPtr<nsIWidget> domWidget = widget::WidgetUtils::DOMWindowToWidget(
nsPIDOMWindowOuter::From(domWindow));
NS_ENSURE_TRUE(domWidget, NS_OK);
widget::GeckoEditableSupport::SetOnBrowserChild(
domWidget->GetOwningBrowserChild());
} else if (!strcmp(aTopic, "geckoview-content-global-transferred")) {
// We're transferring to a new GeckoEditableParent, so notify the
// existing GeckoEditableChild instance associated with the docshell.
nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(aSubject);
widget::GeckoEditableSupport::SetOnBrowserChild(
dom::BrowserChild::GetFrom(docShell));
} else {
return nsBaseAppShell::Observe(aSubject, aTopic, aData);
}
if (removeObserver) {
nsCOMPtr<nsIObserverService> obsServ =
mozilla::services::GetObserverService();
if (obsServ) {
obsServ->RemoveObserver(this, aTopic);
}
}
return NS_OK;
}
bool nsAppShell::ProcessNextNativeEvent(bool mayWait) {
EVLOG("nsAppShell::ProcessNextNativeEvent %d", mayWait);
AUTO_PROFILER_LABEL("nsAppShell::ProcessNextNativeEvent", OTHER);
mozilla::UniquePtr<Event> curEvent;
{
curEvent = mEventQueue.Pop(/* mayWait */ false);
if (!curEvent && mayWait) {
// This processes messages in the Android Looper. Note that we only
// get here if the normal Gecko event loop has been awoken
// priority because we only process them before we're about to
// wait for new events.
if (jni::IsAvailable() && XRE_IsParentProcess() &&
AndroidBridge::Bridge()->PumpMessageLoop()) {
return true;
}
AUTO_PROFILER_LABEL("nsAppShell::ProcessNextNativeEvent:Wait", IDLE);
mozilla::BackgroundHangMonitor().NotifyWait();
curEvent = mEventQueue.Pop(/* mayWait */ true);
}
}
if (!curEvent) return false;
mozilla::BackgroundHangMonitor().NotifyActivity();
curEvent->Run();
return true;
}
bool nsAppShell::SyncRunEvent(
Event&& event, UniquePtr<Event> (*eventFactory)(UniquePtr<Event>&&),
const TimeDuration timeout) {
// Perform the call on the Gecko thread in a separate lambda, and wait
// on the monitor on the current thread.
MOZ_ASSERT(!NS_IsMainThread());
// This is the lock to check that app shell is still alive,
// and to wait on for the sync call to complete.
mozilla::MutexAutoLock shellLock(*sAppShellLock);
nsAppShell* const appShell = sAppShell;
if (MOZ_UNLIKELY(!appShell)) {
// Post-shutdown.
return false;
}
bool finished = false;
auto runAndNotify = [&event, &finished] {
nsAppShell* const appShell = nsAppShell::Get();
if (MOZ_UNLIKELY(!appShell || appShell->mSyncRunQuit)) {
return false;
}
event.Run();
finished = true;
mozilla::MutexAutoLock shellLock(*sAppShellLock);
appShell->mSyncRunFinished.NotifyAll();
return finished;
};
UniquePtr<Event> runAndNotifyEvent =
mozilla::MakeUnique<LambdaEvent<decltype(runAndNotify)>>(
std::move(runAndNotify));
if (eventFactory) {
runAndNotifyEvent = (*eventFactory)(std::move(runAndNotifyEvent));
}
appShell->mEventQueue.Post(std::move(runAndNotifyEvent));
while (!finished && MOZ_LIKELY(sAppShell && !sAppShell->mSyncRunQuit)) {
appShell->mSyncRunFinished.Wait(timeout);
}
return finished;
}
already_AddRefed<nsIURI> nsAppShell::ResolveURI(const nsCString& aUriStr) {
nsCOMPtr<nsIIOService> ioServ = do_GetIOService();
nsCOMPtr<nsIURI> uri;
if (NS_SUCCEEDED(
ioServ->NewURI(aUriStr, nullptr, nullptr, getter_AddRefs(uri)))) {
return uri.forget();
}
nsCOMPtr<nsIURIFixup> fixup = components::URIFixup::Service();
nsCOMPtr<nsIURIFixupInfo> fixupInfo;
if (fixup &&
NS_SUCCEEDED(fixup->GetFixupURIInfo(aUriStr, nsIURIFixup::FIXUP_FLAG_NONE,
getter_AddRefs(fixupInfo))) &&
NS_SUCCEEDED(fixupInfo->GetPreferredURI(getter_AddRefs(uri)))) {
return uri.forget();
}
return nullptr;
}
nsresult nsAppShell::AddObserver(const nsAString& aObserverKey,
nsIObserver* aObserver) {
NS_ASSERTION(aObserver != nullptr,
"nsAppShell::AddObserver: aObserver is null!");
mObserversHash.InsertOrUpdate(aObserverKey, aObserver);
return NS_OK;
}
// Used by IPC code
namespace mozilla {
bool ProcessNextEvent() {
nsAppShell* const appShell = nsAppShell::Get();
if (!appShell) {
return false;
}
return appShell->ProcessNextNativeEvent(true) ? true : false;
}
void NotifyEvent() {
nsAppShell* const appShell = nsAppShell::Get();
if (!appShell) {
return;
}
appShell->NotifyNativeEvent();
}
} // namespace mozilla