nsAppShell.h - mozsearch

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/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */

/* 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/. */

/*

 * Runs the main native Cocoa run loop, interrupting it as needed to process

 * Gecko events.

*/

#ifndef nsAppShell_h_

#define nsAppShell_h_

#import <AppKit/NSApplication.h>

#include "nsBaseAppShell.h"

#include "nsTArray.h"

class ProfilingStack;

namespace mozilla {

class nsAvailableMemoryWatcherBase;

// GeckoNSApplication

//

// Subclass of NSApplication for filtering out certain events.

@interface GeckoNSApplication : NSApplication {

@property(readonly) BOOL didLaunch;

@end

@class AppShellDelegate;

class nsAppShell : public nsBaseAppShell {

 public:

  NS_IMETHOD ResumeNative(void) override;

  nsAppShell();

  nsresult Init();

  NS_IMETHOD Run(void) override;

  NS_IMETHOD Exit(void) override;

  NS_IMETHOD OnProcessNextEvent(nsIThreadInternal* aThread,

                                bool aMayWait) override;

  NS_IMETHOD AfterProcessNextEvent(nsIThreadInternal* aThread,

                                   bool aEventWasProcessed) override;

  void OnRunLoopActivityChanged(CFRunLoopActivity aActivity);

  // public only to be visible to Objective-C code that must call it

  void WillTerminate();

  static void OnMemoryPressureChanged(

      dispatch_source_memorypressure_flags_t aPressureLevel);

 protected:

  virtual ~nsAppShell();

  virtual void ScheduleNativeEventCallback() override;

  virtual bool ProcessNextNativeEvent(bool aMayWait) override;

  void InitMemoryPressureObserver();

  static void ProcessGeckoEvents(void* aInfo);

 protected:

  CFMutableArrayRef mAutoreleasePools;

  AppShellDelegate* mDelegate;

  CFRunLoopRef mCFRunLoop;

  CFRunLoopSourceRef mCFRunLoopSource;

  // An observer for the profiler that is notified when the event loop enters

  // and exits the waiting state.

  CFRunLoopObserverRef mCFRunLoopObserver;

  // Non-null while the native event loop is in the waiting state.

  ProfilingStack* mProfilingStackWhileWaiting = nullptr;

  // For getting notifications from the OS about memory pressure state changes.

  dispatch_source_t mMemoryPressureSource = nullptr;

  bool mRunningEventLoop;

  bool mStarted;

  bool mTerminated;

  bool mSkippedNativeCallback;

  bool mRunningCocoaEmbedded;

  int32_t mNativeEventCallbackDepth;

  // Can be set from different threads, so must be modified atomically

  int32_t mNativeEventScheduledDepth;

};

#endif  // nsAppShell_h_