widget/cocoa/nsAppShell.h

   1 /* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 /*
   7  * Runs the main native Cocoa run loop, interrupting it as needed to process
   8  * Gecko events.
   9  */
  10
  11 #ifndef nsAppShell_h_
  12 #define nsAppShell_h_
  13
  14 #import <AppKit/NSApplication.h>
  15
  16 #include "nsBaseAppShell.h"
  17 #include "nsTArray.h"
  18
  19 class ProfilingStack;
  20
  21 namespace mozilla {
  22 class nsAvailableMemoryWatcherBase;
  23 }
  24
  25 // GeckoNSApplication
  26 //
  27 // Subclass of NSApplication for filtering out certain events.
  28 @interface GeckoNSApplication : NSApplication {
  29 }
  30 @end
  31
  32 @class AppShellDelegate;
  33
  34 class nsAppShell : public nsBaseAppShell {
  35  public:
  36   NS_IMETHOD ResumeNative(void) override;
  37
  38   nsAppShell();
  39
  40   nsresult Init();
  41
  42   NS_IMETHOD Run(void) override;
  43   NS_IMETHOD Exit(void) override;
  44   NS_IMETHOD OnProcessNextEvent(nsIThreadInternal* aThread, bool aMayWait) override;
  45   NS_IMETHOD AfterProcessNextEvent(nsIThreadInternal* aThread, bool aEventWasProcessed) override;
  46
  47   void OnRunLoopActivityChanged(CFRunLoopActivity aActivity);
  48
  49   // public only to be visible to Objective-C code that must call it
  50   void WillTerminate();
  51
  52   static void OnMemoryPressureChanged(dispatch_source_memorypressure_flags_t aPressureLevel);
  53
  54  protected:
  55   virtual ~nsAppShell();
  56
  57   virtual void ScheduleNativeEventCallback() override;
  58   virtual bool ProcessNextNativeEvent(bool aMayWait) override;
  59
  60   void InitMemoryPressureObserver();
  61
  62   static void ProcessGeckoEvents(void* aInfo);
  63
  64  protected:
  65   CFMutableArrayRef mAutoreleasePools;
  66
  67   AppShellDelegate* mDelegate;
  68   CFRunLoopRef mCFRunLoop;
  69   CFRunLoopSourceRef mCFRunLoopSource;
  70
  71   // An observer for the profiler that is notified when the event loop enters
  72   // and exits the waiting state.
  73   CFRunLoopObserverRef mCFRunLoopObserver;
  74
  75   // Non-null while the native event loop is in the waiting state.
  76   ProfilingStack* mProfilingStackWhileWaiting = nullptr;
  77
  78   // For getting notifications from the OS about memory pressure state changes.
  79   dispatch_source_t mMemoryPressureSource = nullptr;
  80
  81   bool mRunningEventLoop;
  82   bool mStarted;
  83   bool mTerminated;
  84   bool mSkippedNativeCallback;
  85   bool mRunningCocoaEmbedded;
  86
  87   int32_t mNativeEventCallbackDepth;
  88   // Can be set from different threads, so must be modified atomically
  89   int32_t mNativeEventScheduledDepth;
  90 };
  91
  92 #endif  // nsAppShell_h_