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 // Copyright (c) 2009 The Chromium Authors. All rights reserved.

 // Use of this source code is governed by a BSD-style license that can be

 // found in the LICENSE file.

 #ifndef BASE_CHROME_APPLICATION_MAC_H_

 #define BASE_CHROME_APPLICATION_MAC_H_

 #import <AppKit/AppKit.h>

 #include "base/basictypes.h"

 #include "base/scoped_nsobject.h"

 // Event hooks must implement this protocol.

 @protocol CrApplicationEventHookProtocol

 - (void)hookForEvent:(NSEvent*)theEvent;

 @end

 @interface CrApplication : NSApplication {

  @private

   BOOL handlingSendEvent_;

  // Array of objects implementing the CrApplicationEventHookProtocol

   scoped_nsobject<NSMutableArray> eventHooks_;

 }

 @property(readonly,

           getter=isHandlingSendEvent,

           nonatomic) BOOL handlingSendEvent;

 // Add or remove an event hook to be called for every sendEvent:

 // that the application receives.  These handlers are called before

 // the normal [NSApplication sendEvent:] call is made.

 // This is not a good alternative to a nested event loop.  It should

 // be used only when normal event logic and notification breaks down

 // (e.g. when clicking outside a canBecomeKey:NO window to "switch

 // context" out of it).

 - (void)addEventHook:(id<CrApplicationEventHookProtocol>)hook;

 - (void)removeEventHook:(id<CrApplicationEventHookProtocol>)hook;

 + (NSApplication*)sharedApplication;

 @end

 namespace chrome_application_mac {

 // Controls the state of |handlingSendEvent_| in the event loop so that it is

 // reset properly.

 class ScopedSendingEvent {

  public:

   ScopedSendingEvent();

   ~ScopedSendingEvent();

  private:

   CrApplication* app_;

   BOOL handling_;

   DISALLOW_COPY_AND_ASSIGN(ScopedSendingEvent);

 };

 }  // chrome_application_mac

 #endif  // BASE_CHROME_APPLICATION_MAC_H_