зеркало из https://github.com/mozilla/gecko-dev.git
1155 строки
43 KiB
Plaintext
1155 строки
43 KiB
Plaintext
/* -*- tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Runs the main native Cocoa run loop, interrupting it as needed to process
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* Gecko events.
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*/
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#import <Cocoa/Cocoa.h>
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#include <dlfcn.h>
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#include "mozilla/AvailableMemoryWatcher.h"
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#include "CustomCocoaEvents.h"
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#include "mozilla/WidgetTraceEvent.h"
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#include "nsAppShell.h"
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#include "gfxPlatform.h"
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#include "nsCOMPtr.h"
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#include "nsIFile.h"
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#include "nsDirectoryServiceDefs.h"
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#include "nsString.h"
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#include "nsIRollupListener.h"
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#include "nsIWidget.h"
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#include "nsMemoryPressure.h"
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#include "nsThreadUtils.h"
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#include "nsServiceManagerUtils.h"
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#include "nsObjCExceptions.h"
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#include "nsCocoaUtils.h"
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#include "nsCocoaFeatures.h"
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#include "nsChildView.h"
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#include "nsToolkit.h"
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#include "TextInputHandler.h"
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#include "mozilla/BackgroundHangMonitor.h"
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#include "ScreenHelperCocoa.h"
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#include "mozilla/Hal.h"
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#include "mozilla/ProfilerLabels.h"
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#include "mozilla/ProfilerThreadSleep.h"
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#include "mozilla/widget/ScreenManager.h"
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#include "HeadlessScreenHelper.h"
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#include "MOZMenuOpeningCoordinator.h"
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#include "pratom.h"
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#if !defined(RELEASE_OR_BETA) || defined(DEBUG)
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# include "nsSandboxViolationSink.h"
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#endif
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#include <IOKit/pwr_mgt/IOPMLib.h>
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#include "nsIDOMWakeLockListener.h"
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#include "nsIPowerManagerService.h"
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#include "nsIObserverService.h"
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#include "mozilla/Services.h"
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#include "mozilla/StaticPrefs_widget.h"
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using namespace mozilla;
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using namespace mozilla::widget;
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#define WAKE_LOCK_LOG(...) \
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MOZ_LOG(gMacWakeLockLog, mozilla::LogLevel::Debug, (__VA_ARGS__))
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static mozilla::LazyLogModule gMacWakeLockLog("MacWakeLock");
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// A wake lock listener that disables screen saver when requested by
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// Gecko. For example when we're playing video in a foreground tab we
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// don't want the screen saver to turn on.
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class MacWakeLockListener final : public nsIDOMMozWakeLockListener {
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public:
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NS_DECL_ISUPPORTS;
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private:
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~MacWakeLockListener() {}
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IOPMAssertionID mAssertionNoDisplaySleepID = kIOPMNullAssertionID;
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IOPMAssertionID mAssertionNoIdleSleepID = kIOPMNullAssertionID;
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NS_IMETHOD Callback(const nsAString& aTopic,
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const nsAString& aState) override {
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if (!aTopic.EqualsASCII("screen") && !aTopic.EqualsASCII("audio-playing") &&
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!aTopic.EqualsASCII("video-playing")) {
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return NS_OK;
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}
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// we should still hold the lock for background audio.
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if (aTopic.EqualsASCII("audio-playing") &&
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aState.EqualsASCII("locked-background")) {
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WAKE_LOCK_LOG("keep audio playing even in background");
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return NS_OK;
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}
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bool shouldKeepDisplayOn =
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aTopic.EqualsASCII("screen") || aTopic.EqualsASCII("video-playing");
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CFStringRef assertionType = shouldKeepDisplayOn
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? kIOPMAssertionTypeNoDisplaySleep
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: kIOPMAssertionTypeNoIdleSleep;
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IOPMAssertionID& assertionId = shouldKeepDisplayOn
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? mAssertionNoDisplaySleepID
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: mAssertionNoIdleSleepID;
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WAKE_LOCK_LOG("topic=%s, state=%s, shouldKeepDisplayOn=%d",
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NS_ConvertUTF16toUTF8(aTopic).get(),
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NS_ConvertUTF16toUTF8(aState).get(), shouldKeepDisplayOn);
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// Note the wake lock code ensures that we're not sent duplicate
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// "locked-foreground" notifications when multiple wake locks are held.
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if (aState.EqualsASCII("locked-foreground")) {
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if (assertionId != kIOPMNullAssertionID) {
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WAKE_LOCK_LOG("already has a lock");
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return NS_OK;
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}
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// Prevent screen saver.
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CFStringRef cf_topic = ::CFStringCreateWithCharacters(
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kCFAllocatorDefault, reinterpret_cast<const UniChar*>(aTopic.Data()),
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aTopic.Length());
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IOReturn success = ::IOPMAssertionCreateWithName(
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assertionType, kIOPMAssertionLevelOn, cf_topic, &assertionId);
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CFRelease(cf_topic);
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if (success != kIOReturnSuccess) {
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WAKE_LOCK_LOG("failed to disable screensaver");
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}
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WAKE_LOCK_LOG("create screensaver");
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} else {
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// Re-enable screen saver.
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if (assertionId != kIOPMNullAssertionID) {
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IOReturn result = ::IOPMAssertionRelease(assertionId);
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if (result != kIOReturnSuccess) {
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WAKE_LOCK_LOG("failed to release screensaver");
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}
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WAKE_LOCK_LOG("Release screensaver");
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assertionId = kIOPMNullAssertionID;
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}
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}
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return NS_OK;
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}
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}; // MacWakeLockListener
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// defined in nsCocoaWindow.mm
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extern int32_t gXULModalLevel;
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static bool gAppShellMethodsSwizzled = false;
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void OnUncaughtException(NSException* aException) {
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nsObjCExceptionLog(aException);
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MOZ_CRASH(
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"Uncaught Objective C exception from NSSetUncaughtExceptionHandler");
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}
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@implementation GeckoNSApplication
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// Load is called very early during startup, when the Objective C runtime loads
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// this class.
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+ (void)load {
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NSSetUncaughtExceptionHandler(OnUncaughtException);
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}
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// This method is called from NSDefaultTopLevelErrorHandler, which is invoked
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// when an Objective C exception propagates up into the native event loop. It is
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// possible that it is also called in other cases.
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- (void)reportException:(NSException*)aException {
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if (ShouldIgnoreObjCException(aException)) {
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return;
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}
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nsObjCExceptionLog(aException);
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#ifdef NIGHTLY_BUILD
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MOZ_CRASH("Uncaught Objective C exception from -[GeckoNSApplication "
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"reportException:]");
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#endif
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}
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- (void)run {
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_didLaunch = YES;
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[super run];
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}
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- (void)sendEvent:(NSEvent*)anEvent {
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mozilla::BackgroundHangMonitor().NotifyActivity();
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if ([anEvent type] == NSEventTypeApplicationDefined &&
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[anEvent subtype] == kEventSubtypeTrace) {
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mozilla::SignalTracerThread();
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return;
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}
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[super sendEvent:anEvent];
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}
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- (NSEvent*)nextEventMatchingMask:(NSEventMask)mask
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untilDate:(NSDate*)expiration
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inMode:(NSString*)mode
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dequeue:(BOOL)flag {
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MOZ_ASSERT([NSApp didLaunch]);
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if (expiration) {
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mozilla::BackgroundHangMonitor().NotifyWait();
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}
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NSEvent* nextEvent = [super nextEventMatchingMask:mask
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untilDate:expiration
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inMode:mode
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dequeue:flag];
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if (expiration) {
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mozilla::BackgroundHangMonitor().NotifyActivity();
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}
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return nextEvent;
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}
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@end
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// AppShellDelegate
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//
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// Cocoa bridge class. An object of this class is registered to receive
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// notifications.
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//
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@interface AppShellDelegate : NSObject {
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@private
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nsAppShell* mAppShell;
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}
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- (id)initWithAppShell:(nsAppShell*)aAppShell;
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- (void)applicationWillTerminate:(NSNotification*)aNotification;
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@end
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// nsAppShell implementation
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NS_IMETHODIMP
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nsAppShell::ResumeNative(void) {
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nsresult retval = nsBaseAppShell::ResumeNative();
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if (NS_SUCCEEDED(retval) && (mSuspendNativeCount == 0) &&
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mSkippedNativeCallback) {
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mSkippedNativeCallback = false;
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ScheduleNativeEventCallback();
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}
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return retval;
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}
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nsAppShell::nsAppShell()
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: mAutoreleasePools(nullptr),
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mDelegate(nullptr),
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mCFRunLoop(NULL),
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mCFRunLoopSource(NULL),
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mRunningEventLoop(false),
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mStarted(false),
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mTerminated(false),
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mSkippedNativeCallback(false),
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mNativeEventCallbackDepth(0),
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mNativeEventScheduledDepth(0) {
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// A Cocoa event loop is running here if (and only if) we've been embedded
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// by a Cocoa app.
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mRunningCocoaEmbedded = [NSApp isRunning] ? true : false;
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}
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nsAppShell::~nsAppShell() {
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NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
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hal::Shutdown();
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if (mMemoryPressureSource) {
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dispatch_release(mMemoryPressureSource);
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mMemoryPressureSource = nullptr;
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}
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if (mCFRunLoop) {
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if (mCFRunLoopSource) {
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::CFRunLoopRemoveSource(mCFRunLoop, mCFRunLoopSource,
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kCFRunLoopCommonModes);
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::CFRelease(mCFRunLoopSource);
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}
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if (mCFRunLoopObserver) {
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::CFRunLoopRemoveObserver(mCFRunLoop, mCFRunLoopObserver,
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kCFRunLoopCommonModes);
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::CFRelease(mCFRunLoopObserver);
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}
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::CFRelease(mCFRunLoop);
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}
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if (mAutoreleasePools) {
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NS_ASSERTION(::CFArrayGetCount(mAutoreleasePools) == 0,
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"nsAppShell destroyed without popping all autorelease pools");
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::CFRelease(mAutoreleasePools);
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}
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[mDelegate release];
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NS_OBJC_END_TRY_IGNORE_BLOCK
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}
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NS_IMPL_ISUPPORTS(MacWakeLockListener, nsIDOMMozWakeLockListener)
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mozilla::StaticRefPtr<MacWakeLockListener> sWakeLockListener;
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static void AddScreenWakeLockListener() {
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nsCOMPtr<nsIPowerManagerService> sPowerManagerService =
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do_GetService(POWERMANAGERSERVICE_CONTRACTID);
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if (sPowerManagerService) {
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sWakeLockListener = new MacWakeLockListener();
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sPowerManagerService->AddWakeLockListener(sWakeLockListener);
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} else {
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NS_WARNING(
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"Failed to retrieve PowerManagerService, wakelocks will be broken!");
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}
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}
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static void RemoveScreenWakeLockListener() {
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nsCOMPtr<nsIPowerManagerService> sPowerManagerService =
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do_GetService(POWERMANAGERSERVICE_CONTRACTID);
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if (sPowerManagerService) {
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sPowerManagerService->RemoveWakeLockListener(sWakeLockListener);
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sPowerManagerService = nullptr;
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sWakeLockListener = nullptr;
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}
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}
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void RunLoopObserverCallback(CFRunLoopObserverRef aObserver,
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CFRunLoopActivity aActivity, void* aInfo) {
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static_cast<nsAppShell*>(aInfo)->OnRunLoopActivityChanged(aActivity);
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}
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void nsAppShell::OnRunLoopActivityChanged(CFRunLoopActivity aActivity) {
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if (aActivity == kCFRunLoopBeforeWaiting) {
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mozilla::BackgroundHangMonitor().NotifyWait();
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}
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// When the event loop is in its waiting state, we would like the profiler to
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// know that the thread is idle. The usual way to notify the profiler of
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// idleness would be to place a profiler label frame with the IDLE category on
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// the stack, for the duration of the function that does the waiting. However,
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// since macOS uses an event loop model where "the event loop calls you", we
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// do not control the function that does the waiting; the waiting happens
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// inside CFRunLoop code. Instead, the run loop notifies us when it enters and
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// exits the waiting state, by calling this function. So we do not have a
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// function under our control that stays on the stack for the duration of the
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// wait. So, rather than putting an AutoProfilerLabel on the stack, we will
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// manually push and pop the label frame here. The location in the stack where
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// this label frame is inserted is somewhat arbitrary. In practice, the label
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// frame will be at the very tip of the stack, looking like it's "inside" the
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// mach_msg_trap wait function.
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if (aActivity == kCFRunLoopBeforeWaiting) {
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using ThreadRegistration = mozilla::profiler::ThreadRegistration;
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ThreadRegistration::WithOnThreadRef(
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[&](ThreadRegistration::OnThreadRef aOnThreadRef) {
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ProfilingStack& profilingStack =
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aOnThreadRef.UnlockedConstReaderAndAtomicRWRef()
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.ProfilingStackRef();
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mProfilingStackWhileWaiting = &profilingStack;
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uint8_t variableOnStack = 0;
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profilingStack.pushLabelFrame("Native event loop idle", nullptr,
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&variableOnStack,
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JS::ProfilingCategoryPair::IDLE, 0);
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profiler_thread_sleep();
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});
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} else {
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if (mProfilingStackWhileWaiting) {
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mProfilingStackWhileWaiting->pop();
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mProfilingStackWhileWaiting = nullptr;
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profiler_thread_wake();
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}
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}
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}
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// Init
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//
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// Loads the nib (see bug 316076c21) and sets up the CFRunLoopSource used to
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// interrupt the main native run loop.
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//
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// public
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nsresult nsAppShell::Init() {
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NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
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// No event loop is running yet (unless an embedding app that uses
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// NSApplicationMain() is running).
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NSAutoreleasePool* localPool = [[NSAutoreleasePool alloc] init];
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char* mozAppNoDock = PR_GetEnv("MOZ_APP_NO_DOCK");
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if (mozAppNoDock && strcmp(mozAppNoDock, "") != 0) {
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[NSApp setActivationPolicy:NSApplicationActivationPolicyAccessory];
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}
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// mAutoreleasePools is used as a stack of NSAutoreleasePool objects created
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// by |this|. CFArray is used instead of NSArray because NSArray wants to
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// retain each object you add to it, and you can't retain an
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// NSAutoreleasePool.
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mAutoreleasePools = ::CFArrayCreateMutable(nullptr, 0, nullptr);
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NS_ENSURE_STATE(mAutoreleasePools);
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bool isNSApplicationProcessType =
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(XRE_GetProcessType() != GeckoProcessType_RDD) &&
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(XRE_GetProcessType() != GeckoProcessType_Socket);
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if (isNSApplicationProcessType) {
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// This call initializes NSApplication unless:
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// 1) we're using xre -- NSApp's already been initialized by
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// MacApplicationDelegate.mm's EnsureUseCocoaDockAPI().
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// 2) an embedding app that uses NSApplicationMain() is running -- NSApp's
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// already been initialized and its main run loop is already running.
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[[NSBundle mainBundle] loadNibNamed:@"res/MainMenu"
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owner:[GeckoNSApplication sharedApplication]
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topLevelObjects:nil];
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}
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mDelegate = [[AppShellDelegate alloc] initWithAppShell:this];
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NS_ENSURE_STATE(mDelegate);
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// Add a CFRunLoopSource to the main native run loop. The source is
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// responsible for interrupting the run loop when Gecko events are ready.
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mCFRunLoop = [[NSRunLoop currentRunLoop] getCFRunLoop];
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NS_ENSURE_STATE(mCFRunLoop);
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::CFRetain(mCFRunLoop);
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CFRunLoopSourceContext context;
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bzero(&context, sizeof(context));
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// context.version = 0;
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context.info = this;
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context.perform = ProcessGeckoEvents;
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mCFRunLoopSource = ::CFRunLoopSourceCreate(kCFAllocatorDefault, 0, &context);
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NS_ENSURE_STATE(mCFRunLoopSource);
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::CFRunLoopAddSource(mCFRunLoop, mCFRunLoopSource, kCFRunLoopCommonModes);
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// Add a CFRunLoopObserver so that the profiler can be notified when we enter
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// and exit the waiting state.
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CFRunLoopObserverContext observerContext;
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PodZero(&observerContext);
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observerContext.info = this;
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mCFRunLoopObserver = ::CFRunLoopObserverCreate(
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kCFAllocatorDefault,
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kCFRunLoopBeforeWaiting | kCFRunLoopAfterWaiting | kCFRunLoopExit, true,
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0, RunLoopObserverCallback, &observerContext);
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NS_ENSURE_STATE(mCFRunLoopObserver);
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::CFRunLoopAddObserver(mCFRunLoop, mCFRunLoopObserver, kCFRunLoopCommonModes);
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hal::Init();
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if (XRE_IsParentProcess()) {
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ScreenManager& screenManager = ScreenManager::GetSingleton();
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if (gfxPlatform::IsHeadless()) {
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screenManager.SetHelper(mozilla::MakeUnique<HeadlessScreenHelper>());
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} else {
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screenManager.SetHelper(mozilla::MakeUnique<ScreenHelperCocoa>());
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}
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InitMemoryPressureObserver();
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}
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nsresult rv = nsBaseAppShell::Init();
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if (isNSApplicationProcessType && !gAppShellMethodsSwizzled) {
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// We should only replace the original terminate: method if we're not
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// running in a Cocoa embedder. See bug 604901.
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if (!mRunningCocoaEmbedded) {
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nsToolkit::SwizzleMethods([NSApplication class], @selector(terminate:),
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@selector(nsAppShell_NSApplication_terminate:));
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}
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gAppShellMethodsSwizzled = true;
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}
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#if !defined(RELEASE_OR_BETA) || defined(DEBUG)
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if (Preferences::GetBool("security.sandbox.mac.track.violations", false)) {
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nsSandboxViolationSink::Start();
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}
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#endif
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[localPool release];
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return rv;
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NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
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}
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// ProcessGeckoEvents
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//
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// The "perform" target of mCFRunLoop, called when mCFRunLoopSource is
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// signalled from ScheduleNativeEventCallback.
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//
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// Arrange for Gecko events to be processed on demand (in response to a call
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// to ScheduleNativeEventCallback(), if processing of Gecko events via "native
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// methods" hasn't been suspended). This happens in NativeEventCallback().
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//
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// protected static
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void nsAppShell::ProcessGeckoEvents(void* aInfo) {
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NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
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AUTO_PROFILER_LABEL("nsAppShell::ProcessGeckoEvents", OTHER);
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nsAppShell* self = static_cast<nsAppShell*>(aInfo);
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if (self->mRunningEventLoop) {
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self->mRunningEventLoop = false;
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|
|
// The run loop may be sleeping -- [NSRunLoop runMode:...]
|
|
// won't return until it's given a reason to wake up. Awaken it by
|
|
// posting a bogus event. There's no need to make the event
|
|
// presentable.
|
|
//
|
|
// But _don't_ set windowNumber to '-1' -- that can lead to nasty
|
|
// weirdness like bmo bug 397039 (a crash in [NSApp sendEvent:] on one of
|
|
// these fake events, because the -1 has gotten changed into the number
|
|
// of an actual NSWindow object, and that NSWindow object has just been
|
|
// destroyed). Setting windowNumber to '0' seems to work fine -- this
|
|
// seems to prevent the OS from ever trying to associate our bogus event
|
|
// with a particular NSWindow object.
|
|
[NSApp postEvent:[NSEvent otherEventWithType:NSEventTypeApplicationDefined
|
|
location:NSMakePoint(0, 0)
|
|
modifierFlags:0
|
|
timestamp:0
|
|
windowNumber:0
|
|
context:NULL
|
|
subtype:kEventSubtypeNone
|
|
data1:0
|
|
data2:0]
|
|
atStart:NO];
|
|
// Previously we used to send this second event regardless of
|
|
// self->mRunningEventLoop. However, that was removed in bug 1690687 for
|
|
// performance reasons. It is still needed for the mRunningEventLoop case
|
|
// otherwise we'll get in a cycle of sending postEvent followed by the
|
|
// DummyEvent inserted by nsBaseAppShell::OnProcessNextEvent. This second
|
|
// event will cause the second call to AcquireFirstMatchingEventInQueue in
|
|
// nsAppShell::ProcessNextNativeEvent to return true. Which makes
|
|
// nsBaseAppShell::OnProcessNextEvent call
|
|
// nsAppShell::ProcessNextNativeEvent again during which it will loop until
|
|
// it sleeps because ProcessGeckoEvents() won't be called for the
|
|
// DummyEvent.
|
|
//
|
|
// This is not a good approach and we should fix things up so that only
|
|
// one postEvent is needed.
|
|
[NSApp postEvent:[NSEvent otherEventWithType:NSEventTypeApplicationDefined
|
|
location:NSMakePoint(0, 0)
|
|
modifierFlags:0
|
|
timestamp:0
|
|
windowNumber:0
|
|
context:NULL
|
|
subtype:kEventSubtypeNone
|
|
data1:0
|
|
data2:0]
|
|
atStart:NO];
|
|
}
|
|
|
|
if (self->mSuspendNativeCount <= 0) {
|
|
++self->mNativeEventCallbackDepth;
|
|
self->NativeEventCallback();
|
|
--self->mNativeEventCallbackDepth;
|
|
} else {
|
|
self->mSkippedNativeCallback = true;
|
|
}
|
|
|
|
if (self->mTerminated) {
|
|
// Still needed to avoid crashes on quit in most Mochitests.
|
|
[NSApp postEvent:[NSEvent otherEventWithType:NSEventTypeApplicationDefined
|
|
location:NSMakePoint(0, 0)
|
|
modifierFlags:0
|
|
timestamp:0
|
|
windowNumber:0
|
|
context:NULL
|
|
subtype:kEventSubtypeNone
|
|
data1:0
|
|
data2:0]
|
|
atStart:NO];
|
|
}
|
|
// Normally every call to ScheduleNativeEventCallback() results in
|
|
// exactly one call to ProcessGeckoEvents(). So each Release() here
|
|
// normally balances exactly one AddRef() in ScheduleNativeEventCallback().
|
|
// But if Exit() is called just after ScheduleNativeEventCallback(), the
|
|
// corresponding call to ProcessGeckoEvents() will never happen. We check
|
|
// for this possibility in two different places -- here and in Exit()
|
|
// itself. If we find here that Exit() has been called (that mTerminated
|
|
// is true), it's because we've been called recursively, that Exit() was
|
|
// called from self->NativeEventCallback() above, and that we're unwinding
|
|
// the recursion. In this case we'll never be called again, and we balance
|
|
// here any extra calls to ScheduleNativeEventCallback().
|
|
//
|
|
// When ProcessGeckoEvents() is called recursively, it's because of a
|
|
// call to ScheduleNativeEventCallback() from NativeEventCallback(). We
|
|
// balance the "extra" AddRefs here (rather than always in Exit()) in order
|
|
// to ensure that 'self' stays alive until the end of this method. We also
|
|
// make sure not to finish the balancing until all the recursion has been
|
|
// unwound.
|
|
if (self->mTerminated) {
|
|
int32_t releaseCount = 0;
|
|
if (self->mNativeEventScheduledDepth > self->mNativeEventCallbackDepth) {
|
|
releaseCount = PR_ATOMIC_SET(&self->mNativeEventScheduledDepth,
|
|
self->mNativeEventCallbackDepth);
|
|
}
|
|
while (releaseCount-- > self->mNativeEventCallbackDepth) self->Release();
|
|
} else {
|
|
// As best we can tell, every call to ProcessGeckoEvents() is triggered
|
|
// by a call to ScheduleNativeEventCallback(). But we've seen a few
|
|
// (non-reproducible) cases of double-frees that *might* have been caused
|
|
// by spontaneous calls (from the OS) to ProcessGeckoEvents(). So we
|
|
// deal with that possibility here.
|
|
if (PR_ATOMIC_DECREMENT(&self->mNativeEventScheduledDepth) < 0) {
|
|
PR_ATOMIC_SET(&self->mNativeEventScheduledDepth, 0);
|
|
NS_WARNING("Spontaneous call to ProcessGeckoEvents()!");
|
|
} else {
|
|
self->Release();
|
|
}
|
|
}
|
|
|
|
NS_OBJC_END_TRY_IGNORE_BLOCK;
|
|
}
|
|
|
|
// WillTerminate
|
|
//
|
|
// Called by the AppShellDelegate when an NSApplicationWillTerminate
|
|
// notification is posted. After this method is called, native events should
|
|
// no longer be processed. The NSApplicationWillTerminate notification is
|
|
// only posted when [NSApp terminate:] is called, which doesn't happen on a
|
|
// "normal" application quit.
|
|
//
|
|
// public
|
|
void nsAppShell::WillTerminate() {
|
|
if (mTerminated) return;
|
|
|
|
// Make sure that the nsAppExitEvent posted by nsAppStartup::Quit() (called
|
|
// from [MacApplicationDelegate applicationShouldTerminate:]) gets run.
|
|
NS_ProcessPendingEvents(NS_GetCurrentThread());
|
|
|
|
mTerminated = true;
|
|
}
|
|
|
|
// ScheduleNativeEventCallback
|
|
//
|
|
// Called (possibly on a non-main thread) when Gecko has an event that
|
|
// needs to be processed. The Gecko event needs to be processed on the
|
|
// main thread, so the native run loop must be interrupted.
|
|
//
|
|
// In nsBaseAppShell.cpp, the mNativeEventPending variable is used to
|
|
// ensure that ScheduleNativeEventCallback() is called no more than once
|
|
// per call to NativeEventCallback(). ProcessGeckoEvents() can skip its
|
|
// call to NativeEventCallback() if processing of Gecko events by native
|
|
// means is suspended (using nsIAppShell::SuspendNative()), which will
|
|
// suspend calls from nsBaseAppShell::OnDispatchedEvent() to
|
|
// ScheduleNativeEventCallback(). But when Gecko event processing by
|
|
// native means is resumed (in ResumeNative()), an extra call is made to
|
|
// ScheduleNativeEventCallback() (from ResumeNative()). This triggers
|
|
// another call to ProcessGeckoEvents(), which calls NativeEventCallback(),
|
|
// and nsBaseAppShell::OnDispatchedEvent() resumes calling
|
|
// ScheduleNativeEventCallback().
|
|
//
|
|
// protected virtual
|
|
void nsAppShell::ScheduleNativeEventCallback() {
|
|
NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
|
|
|
|
if (mTerminated) return;
|
|
|
|
// Each AddRef() here is normally balanced by exactly one Release() in
|
|
// ProcessGeckoEvents(). But there are exceptions, for which see
|
|
// ProcessGeckoEvents() and Exit().
|
|
NS_ADDREF_THIS();
|
|
PR_ATOMIC_INCREMENT(&mNativeEventScheduledDepth);
|
|
|
|
// This will invoke ProcessGeckoEvents on the main thread.
|
|
::CFRunLoopSourceSignal(mCFRunLoopSource);
|
|
::CFRunLoopWakeUp(mCFRunLoop);
|
|
|
|
NS_OBJC_END_TRY_IGNORE_BLOCK;
|
|
}
|
|
|
|
// Undocumented Cocoa Event Manager function, present in the same form since
|
|
// at least OS X 10.6.
|
|
extern "C" EventAttributes GetEventAttributes(EventRef inEvent);
|
|
|
|
// ProcessNextNativeEvent
|
|
//
|
|
// If aMayWait is false, process a single native event. If it is true, run
|
|
// the native run loop until stopped by ProcessGeckoEvents.
|
|
//
|
|
// Returns true if more events are waiting in the native event queue.
|
|
//
|
|
// protected virtual
|
|
bool nsAppShell::ProcessNextNativeEvent(bool aMayWait) {
|
|
bool moreEvents = false;
|
|
|
|
NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
|
|
|
|
bool eventProcessed = false;
|
|
NSString* currentMode = nil;
|
|
|
|
if (mTerminated) return false;
|
|
|
|
// Do not call -[NSApplication nextEventMatchingMask:...] when we're trying to
|
|
// close a native menu. Doing so could confuse the NSMenu's closing mechanism.
|
|
// Instead, we try to unwind the stack as quickly as possible and return to
|
|
// the parent event loop. At that point, native events will be processed.
|
|
if (MOZMenuOpeningCoordinator.needToUnwindForMenuClosing) {
|
|
return false;
|
|
}
|
|
|
|
bool wasRunningEventLoop = mRunningEventLoop;
|
|
mRunningEventLoop = aMayWait;
|
|
NSDate* waitUntil = nil;
|
|
if (aMayWait) waitUntil = [NSDate distantFuture];
|
|
|
|
NSRunLoop* currentRunLoop = [NSRunLoop currentRunLoop];
|
|
|
|
EventQueueRef currentEventQueue = GetCurrentEventQueue();
|
|
|
|
if (aMayWait) {
|
|
mozilla::BackgroundHangMonitor().NotifyWait();
|
|
}
|
|
|
|
// Only call -[NSApp sendEvent:] (and indirectly send user-input events to
|
|
// Gecko) if aMayWait is true. Tbis ensures most calls to -[NSApp
|
|
// sendEvent:] happen under nsAppShell::Run(), at the lowest level of
|
|
// recursion -- thereby making it less likely Gecko will process user-input
|
|
// events in the wrong order or skip some of them. It also avoids eating
|
|
// too much CPU in nsBaseAppShell::OnProcessNextEvent() (which calls
|
|
// us) -- thereby avoiding the starvation of nsIRunnable events in
|
|
// nsThread::ProcessNextEvent(). For more information see bug 996848.
|
|
do {
|
|
// No autorelease pool is provided here, because OnProcessNextEvent
|
|
// and AfterProcessNextEvent are responsible for maintaining it.
|
|
NS_ASSERTION(mAutoreleasePools && ::CFArrayGetCount(mAutoreleasePools),
|
|
"No autorelease pool for native event");
|
|
|
|
if (aMayWait && [[GeckoNSApplication sharedApplication] didLaunch]) {
|
|
currentMode = [currentRunLoop currentMode];
|
|
if (!currentMode) currentMode = NSDefaultRunLoopMode;
|
|
NSEvent* nextEvent = [NSApp nextEventMatchingMask:NSEventMaskAny
|
|
untilDate:waitUntil
|
|
inMode:currentMode
|
|
dequeue:YES];
|
|
if (nextEvent) {
|
|
mozilla::BackgroundHangMonitor().NotifyActivity();
|
|
[NSApp sendEvent:nextEvent];
|
|
eventProcessed = true;
|
|
}
|
|
} else {
|
|
// In at least 10.15, AcquireFirstMatchingEventInQueue will move 1
|
|
// CGEvent from the CGEvent queue into the Carbon event queue.
|
|
// Unfortunately, once an event has been moved to the Carbon event queue
|
|
// it's no longer a candidate for coalescing. This means that even if we
|
|
// don't remove the event from the queue, just calling
|
|
// AcquireFirstMatchingEventInQueue can cause behaviour change. Prior to
|
|
// bug 1690687 landing, the event that we got from
|
|
// AcquireFirstMatchingEventInQueue was often our own ApplicationDefined
|
|
// event. However, once we stopped posting that event on every Gecko
|
|
// event we're much more likely to get a CGEvent. When we have a high
|
|
// amount of load on the main thread, we end up alternating between Gecko
|
|
// events and native events. Without CGEvent coalescing, the native
|
|
// event events can accumulate in the Carbon event queue which will
|
|
// manifest as laggy scrolling.
|
|
#if 1
|
|
eventProcessed = false;
|
|
break;
|
|
#else
|
|
// AcquireFirstMatchingEventInQueue() doesn't spin the (native) event
|
|
// loop, though it does queue up any newly available events from the
|
|
// window server.
|
|
EventRef currentEvent = AcquireFirstMatchingEventInQueue(
|
|
currentEventQueue, 0, NULL, kEventQueueOptionsNone);
|
|
if (!currentEvent) {
|
|
continue;
|
|
}
|
|
EventAttributes attrs = GetEventAttributes(currentEvent);
|
|
UInt32 eventKind = GetEventKind(currentEvent);
|
|
UInt32 eventClass = GetEventClass(currentEvent);
|
|
bool osCocoaEvent =
|
|
((eventClass == 'appl') || (eventClass == kEventClassAppleEvent) ||
|
|
((eventClass == 'cgs ') &&
|
|
(eventKind != NSEventTypeApplicationDefined)));
|
|
// If attrs is kEventAttributeUserEvent or kEventAttributeMonitored
|
|
// (i.e. a user input event), we shouldn't process it here while
|
|
// aMayWait is false. Likewise if currentEvent will eventually be
|
|
// turned into an OS-defined Cocoa event, or otherwise needs AppKit
|
|
// processing. Doing otherwise risks doing too much work here, and
|
|
// preventing the event from being properly processed by the AppKit
|
|
// framework.
|
|
if ((attrs != kEventAttributeNone) || osCocoaEvent) {
|
|
// Since we can't process the next event here (while aMayWait is false),
|
|
// we want moreEvents to be false on return.
|
|
eventProcessed = false;
|
|
// This call to ReleaseEvent() matches a call to RetainEvent() in
|
|
// AcquireFirstMatchingEventInQueue() above.
|
|
ReleaseEvent(currentEvent);
|
|
break;
|
|
}
|
|
// This call to RetainEvent() matches a call to ReleaseEvent() in
|
|
// RemoveEventFromQueue() below.
|
|
RetainEvent(currentEvent);
|
|
RemoveEventFromQueue(currentEventQueue, currentEvent);
|
|
EventTargetRef eventDispatcherTarget = GetEventDispatcherTarget();
|
|
SendEventToEventTarget(currentEvent, eventDispatcherTarget);
|
|
// This call to ReleaseEvent() matches a call to RetainEvent() in
|
|
// AcquireFirstMatchingEventInQueue() above.
|
|
ReleaseEvent(currentEvent);
|
|
eventProcessed = true;
|
|
#endif
|
|
}
|
|
} while (mRunningEventLoop);
|
|
|
|
if (eventProcessed) {
|
|
moreEvents =
|
|
(AcquireFirstMatchingEventInQueue(currentEventQueue, 0, NULL,
|
|
kEventQueueOptionsNone) != NULL);
|
|
}
|
|
|
|
mRunningEventLoop = wasRunningEventLoop;
|
|
|
|
NS_OBJC_END_TRY_IGNORE_BLOCK;
|
|
|
|
if (!moreEvents) {
|
|
nsChildView::UpdateCurrentInputEventCount();
|
|
}
|
|
|
|
return moreEvents;
|
|
}
|
|
|
|
// Attempt to work around bug 1801419 by loading and initializing the
|
|
// SidecarCore private framework as the app shell starts up. This normally
|
|
// happens on demand, the first time any Cmd-key combination is pressed, and
|
|
// sometimes triggers crashes, caused by an Apple bug. We hope that doing it
|
|
// now, and somewhat more simply, will avoid the crashes. They happen
|
|
// (intermittently) when SidecarCore code tries to access C strings in special
|
|
// sections of its own __TEXT segment, and triggers fatal page faults (which
|
|
// is Apple's bug). Many of the C strings are part of the Objective-C class
|
|
// hierarchy (class names and so forth). We hope that adding them to this
|
|
// hierarchy will "pin" them in place -- so they'll rarely, if ever, be paged
|
|
// out again. Bug 1801419's crashes happen much more often on macOS 13
|
|
// (Ventura) than on other versions of macOS. So we only use this hack on
|
|
// macOS 13 and up.
|
|
static void PinSidecarCoreTextCStringSections() {
|
|
if (!dlopen(
|
|
"/System/Library/PrivateFrameworks/SidecarCore.framework/SidecarCore",
|
|
RTLD_LAZY)) {
|
|
return;
|
|
}
|
|
|
|
// Explicitly run the most basic part of the initialization code that
|
|
// normally runs automatically on the first Cmd-key combination.
|
|
Class displayManagerClass = NSClassFromString(@"SidecarDisplayManager");
|
|
if ([displayManagerClass respondsToSelector:@selector(sharedManager)]) {
|
|
id sharedManager =
|
|
[displayManagerClass performSelector:@selector(sharedManager)];
|
|
if ([sharedManager respondsToSelector:@selector(devices)]) {
|
|
[sharedManager performSelector:@selector(devices)];
|
|
}
|
|
}
|
|
}
|
|
|
|
// Run
|
|
//
|
|
// Overrides the base class's Run() method to call [NSApp run] (which spins
|
|
// the native run loop until the application quits). Since (unlike the base
|
|
// class's Run() method) we don't process any Gecko events here, they need
|
|
// to be processed elsewhere (in NativeEventCallback(), called from
|
|
// ProcessGeckoEvents()).
|
|
//
|
|
// Camino called [NSApp run] on its own (via NSApplicationMain()), and so
|
|
// didn't call nsAppShell::Run().
|
|
//
|
|
// public
|
|
NS_IMETHODIMP
|
|
nsAppShell::Run(void) {
|
|
NS_ASSERTION(!mStarted, "nsAppShell::Run() called multiple times");
|
|
if (mStarted || mTerminated) return NS_OK;
|
|
|
|
mStarted = true;
|
|
|
|
if (XRE_IsParentProcess()) {
|
|
if (nsCocoaFeatures::OnVenturaOrLater()) {
|
|
PinSidecarCoreTextCStringSections();
|
|
}
|
|
AddScreenWakeLockListener();
|
|
}
|
|
|
|
// We use the native Gecko event loop in content processes.
|
|
nsresult rv = NS_OK;
|
|
if (XRE_UseNativeEventProcessing()) {
|
|
NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
|
|
[NSApp run];
|
|
NS_OBJC_END_TRY_IGNORE_BLOCK;
|
|
} else {
|
|
rv = nsBaseAppShell::Run();
|
|
}
|
|
|
|
if (XRE_IsParentProcess()) {
|
|
RemoveScreenWakeLockListener();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsAppShell::Exit(void) {
|
|
NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
|
|
|
|
// This method is currently called more than once -- from (according to
|
|
// mento) an nsAppExitEvent dispatched by nsAppStartup::Quit() and from an
|
|
// XPCOM shutdown notification that nsBaseAppShell has registered to
|
|
// receive. So we need to ensure that multiple calls won't break anything.
|
|
if (mTerminated) {
|
|
return NS_OK;
|
|
}
|
|
|
|
mTerminated = true;
|
|
|
|
#if !defined(RELEASE_OR_BETA) || defined(DEBUG)
|
|
nsSandboxViolationSink::Stop();
|
|
#endif
|
|
|
|
// Quoting from Apple's doc on the [NSApplication stop:] method (from their
|
|
// doc on the NSApplication class): "If this method is invoked during a
|
|
// modal event loop, it will break that loop but not the main event loop."
|
|
// nsAppShell::Exit() shouldn't be called from a modal event loop. So if
|
|
// it is we complain about it (to users of debug builds) and call [NSApp
|
|
// stop:] one extra time. (I'm not sure if modal event loops can be nested
|
|
// -- Apple's docs don't say one way or the other. But the return value
|
|
// of [NSApp _isRunningModal] doesn't change immediately after a call to
|
|
// [NSApp stop:], so we have to assume that one extra call to [NSApp stop:]
|
|
// will do the job.)
|
|
BOOL cocoaModal = [NSApp _isRunningModal];
|
|
NS_ASSERTION(!cocoaModal,
|
|
"Don't call nsAppShell::Exit() from a modal event loop!");
|
|
if (cocoaModal) [NSApp stop:nullptr];
|
|
[NSApp stop:nullptr];
|
|
|
|
// A call to Exit() just after a call to ScheduleNativeEventCallback()
|
|
// prevents the (normally) matching call to ProcessGeckoEvents() from
|
|
// happening. If we've been called from ProcessGeckoEvents() (as usually
|
|
// happens), we take care of it there. But if we have an unbalanced call
|
|
// to ScheduleNativeEventCallback() and ProcessGeckoEvents() isn't on the
|
|
// stack, we need to take care of the problem here.
|
|
if (!mNativeEventCallbackDepth && mNativeEventScheduledDepth) {
|
|
int32_t releaseCount = PR_ATOMIC_SET(&mNativeEventScheduledDepth, 0);
|
|
while (releaseCount-- > 0) NS_RELEASE_THIS();
|
|
}
|
|
|
|
return nsBaseAppShell::Exit();
|
|
|
|
NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
|
|
}
|
|
|
|
// OnProcessNextEvent
|
|
//
|
|
// This nsIThreadObserver method is called prior to processing an event.
|
|
// Set up an autorelease pool that will service any autoreleased Cocoa
|
|
// objects during this event. This includes native events processed by
|
|
// ProcessNextNativeEvent. The autorelease pool will be popped by
|
|
// AfterProcessNextEvent, it is important for these two methods to be
|
|
// tightly coupled.
|
|
//
|
|
// public
|
|
NS_IMETHODIMP
|
|
nsAppShell::OnProcessNextEvent(nsIThreadInternal* aThread, bool aMayWait) {
|
|
NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
|
|
|
|
NS_ASSERTION(mAutoreleasePools,
|
|
"No stack on which to store autorelease pool");
|
|
|
|
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
|
|
::CFArrayAppendValue(mAutoreleasePools, pool);
|
|
|
|
return nsBaseAppShell::OnProcessNextEvent(aThread, aMayWait);
|
|
|
|
NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
|
|
}
|
|
|
|
// AfterProcessNextEvent
|
|
//
|
|
// This nsIThreadObserver method is called after event processing is complete.
|
|
// The Cocoa implementation cleans up the autorelease pool create by the
|
|
// previous OnProcessNextEvent call.
|
|
//
|
|
// public
|
|
NS_IMETHODIMP
|
|
nsAppShell::AfterProcessNextEvent(nsIThreadInternal* aThread,
|
|
bool aEventWasProcessed) {
|
|
NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
|
|
|
|
CFIndex count = ::CFArrayGetCount(mAutoreleasePools);
|
|
|
|
NS_ASSERTION(mAutoreleasePools && count,
|
|
"Processed an event, but there's no autorelease pool?");
|
|
|
|
const NSAutoreleasePool* pool = static_cast<const NSAutoreleasePool*>(
|
|
::CFArrayGetValueAtIndex(mAutoreleasePools, count - 1));
|
|
::CFArrayRemoveValueAtIndex(mAutoreleasePools, count - 1);
|
|
[pool release];
|
|
|
|
return nsBaseAppShell::AfterProcessNextEvent(aThread, aEventWasProcessed);
|
|
|
|
NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
|
|
}
|
|
|
|
void nsAppShell::InitMemoryPressureObserver() {
|
|
// Testing shows that sometimes the memory pressure event is not fired for
|
|
// over a minute after the memory pressure change is reflected in sysctl
|
|
// values. Hence this may need to be augmented with polling of the memory
|
|
// pressure sysctls for lower latency reactions to OS memory pressure. This
|
|
// was also observed when using DISPATCH_QUEUE_PRIORITY_HIGH.
|
|
mMemoryPressureSource = dispatch_source_create(
|
|
DISPATCH_SOURCE_TYPE_MEMORYPRESSURE, 0,
|
|
DISPATCH_MEMORYPRESSURE_NORMAL | DISPATCH_MEMORYPRESSURE_WARN |
|
|
DISPATCH_MEMORYPRESSURE_CRITICAL,
|
|
dispatch_get_main_queue());
|
|
|
|
dispatch_source_set_event_handler(mMemoryPressureSource, ^{
|
|
dispatch_source_memorypressure_flags_t pressureLevel =
|
|
dispatch_source_get_data(mMemoryPressureSource);
|
|
nsAppShell::OnMemoryPressureChanged(pressureLevel);
|
|
});
|
|
|
|
dispatch_resume(mMemoryPressureSource);
|
|
|
|
// Initialize the memory watcher.
|
|
RefPtr<mozilla::nsAvailableMemoryWatcherBase> watcher(
|
|
nsAvailableMemoryWatcherBase::GetSingleton());
|
|
}
|
|
|
|
void nsAppShell::OnMemoryPressureChanged(
|
|
dispatch_source_memorypressure_flags_t aPressureLevel) {
|
|
// The memory pressure dispatch source is created (above) with
|
|
// dispatch_get_main_queue() which always fires on the main thread.
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
MacMemoryPressureLevel geckoPressureLevel;
|
|
switch (aPressureLevel) {
|
|
case DISPATCH_MEMORYPRESSURE_NORMAL:
|
|
geckoPressureLevel = MacMemoryPressureLevel::Value::eNormal;
|
|
break;
|
|
case DISPATCH_MEMORYPRESSURE_WARN:
|
|
geckoPressureLevel = MacMemoryPressureLevel::Value::eWarning;
|
|
break;
|
|
case DISPATCH_MEMORYPRESSURE_CRITICAL:
|
|
geckoPressureLevel = MacMemoryPressureLevel::Value::eCritical;
|
|
break;
|
|
default:
|
|
geckoPressureLevel = MacMemoryPressureLevel::Value::eUnexpected;
|
|
}
|
|
|
|
RefPtr<mozilla::nsAvailableMemoryWatcherBase> watcher(
|
|
nsAvailableMemoryWatcherBase::GetSingleton());
|
|
watcher->OnMemoryPressureChanged(geckoPressureLevel);
|
|
}
|
|
|
|
// AppShellDelegate implementation
|
|
|
|
@implementation AppShellDelegate
|
|
// initWithAppShell:
|
|
//
|
|
// Constructs the AppShellDelegate object
|
|
- (id)initWithAppShell:(nsAppShell*)aAppShell {
|
|
NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
|
|
|
|
if ((self = [self init])) {
|
|
mAppShell = aAppShell;
|
|
|
|
[[NSNotificationCenter defaultCenter]
|
|
addObserver:self
|
|
selector:@selector(applicationWillTerminate:)
|
|
name:NSApplicationWillTerminateNotification
|
|
object:NSApp];
|
|
[[NSNotificationCenter defaultCenter]
|
|
addObserver:self
|
|
selector:@selector(applicationDidBecomeActive:)
|
|
name:NSApplicationDidBecomeActiveNotification
|
|
object:NSApp];
|
|
[[NSNotificationCenter defaultCenter]
|
|
addObserver:self
|
|
selector:@selector(timezoneChanged:)
|
|
name:NSSystemTimeZoneDidChangeNotification
|
|
object:nil];
|
|
}
|
|
|
|
return self;
|
|
|
|
NS_OBJC_END_TRY_BLOCK_RETURN(nil);
|
|
}
|
|
|
|
- (void)dealloc {
|
|
NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
|
|
|
|
[[NSNotificationCenter defaultCenter] removeObserver:self];
|
|
[[NSDistributedNotificationCenter defaultCenter] removeObserver:self];
|
|
[super dealloc];
|
|
|
|
NS_OBJC_END_TRY_IGNORE_BLOCK;
|
|
}
|
|
|
|
// applicationWillTerminate:
|
|
//
|
|
// Notify the nsAppShell that native event processing should be discontinued.
|
|
- (void)applicationWillTerminate:(NSNotification*)aNotification {
|
|
NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
|
|
|
|
mAppShell->WillTerminate();
|
|
|
|
NS_OBJC_END_TRY_IGNORE_BLOCK;
|
|
}
|
|
|
|
// applicationDidBecomeActive
|
|
//
|
|
// Make sure TextInputHandler::sLastModifierState is updated when we become
|
|
// active (since we won't have received [ChildView flagsChanged:] messages
|
|
// while inactive).
|
|
- (void)applicationDidBecomeActive:(NSNotification*)aNotification {
|
|
NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
|
|
|
|
// [NSEvent modifierFlags] is valid on every kind of event, so we don't need
|
|
// to worry about getting an NSInternalInconsistencyException here.
|
|
NSEvent* currentEvent = [NSApp currentEvent];
|
|
if (currentEvent) {
|
|
TextInputHandler::sLastModifierState =
|
|
[currentEvent modifierFlags] &
|
|
NSEventModifierFlagDeviceIndependentFlagsMask;
|
|
}
|
|
|
|
nsCOMPtr<nsIObserverService> observerService = services::GetObserverService();
|
|
if (observerService) {
|
|
observerService->NotifyObservers(
|
|
nullptr, NS_WIDGET_MAC_APP_ACTIVATE_OBSERVER_TOPIC, nullptr);
|
|
}
|
|
|
|
NS_OBJC_END_TRY_IGNORE_BLOCK;
|
|
}
|
|
|
|
- (void)timezoneChanged:(NSNotification*)aNotification {
|
|
NS_OBJC_BEGIN_TRY_IGNORE_BLOCK;
|
|
|
|
nsBaseAppShell::OnSystemTimezoneChange();
|
|
|
|
NS_OBJC_END_TRY_IGNORE_BLOCK;
|
|
}
|
|
|
|
@end
|
|
|
|
// We hook terminate: in order to make OS-initiated termination work nicely
|
|
// with Gecko's shutdown sequence. (Two ways to trigger OS-initiated
|
|
// termination: 1) Quit from the Dock menu; 2) Log out from (or shut down)
|
|
// your computer while the browser is active.)
|
|
@interface NSApplication (MethodSwizzling)
|
|
- (void)nsAppShell_NSApplication_terminate:(id)sender;
|
|
@end
|
|
|
|
@implementation NSApplication (MethodSwizzling)
|
|
|
|
// Called by the OS after [MacApplicationDelegate applicationShouldTerminate:]
|
|
// has returned NSTerminateNow. This method "subclasses" and replaces the
|
|
// OS's original implementation. The only thing the orginal method does which
|
|
// we need is that it posts NSApplicationWillTerminateNotification. Everything
|
|
// else is unneeded (because it's handled elsewhere), or actively interferes
|
|
// with Gecko's shutdown sequence. For example the original terminate: method
|
|
// causes the app to exit() inside [NSApp run] (called from nsAppShell::Run()
|
|
// above), which means that nothing runs after the call to nsAppStartup::Run()
|
|
// in XRE_Main(), which in particular means that ScopedXPCOMStartup's destructor
|
|
// and NS_ShutdownXPCOM() never get called.
|
|
- (void)nsAppShell_NSApplication_terminate:(id)sender {
|
|
[[NSNotificationCenter defaultCenter]
|
|
postNotificationName:NSApplicationWillTerminateNotification
|
|
object:NSApp];
|
|
}
|
|
|
|
@end
|