/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Josh Aas <josh@mozilla.com>
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */

#ifndef nsMenuX_h_
#define nsMenuX_h_

#import <Cocoa/Cocoa.h>
#import <Carbon/Carbon.h>

#include "nsMenuBaseX.h"
#include "nsMenuBarX.h"
#include "nsCOMPtr.h"
#include "nsChangeObserver.h"
#include "nsAutoPtr.h"

class nsMenuX;
class nsMenuItemIconX;
class nsMenuItemX;
class nsIWidget;


// MenuDelegate is used to receive Cocoa notifications for
// setting up carbon events
@interface MenuDelegate : NSObject
{
  nsMenuX* mGeckoMenu; // weak ref
  EventHandlerRef mEventHandler;
  BOOL mHaveInstalledCarbonEvents;
}
- (id)initWithGeckoMenu:(nsMenuX*)geckoMenu;
@end


// Once instantiated, this object lives until its DOM node or its parent window is destroyed.
// Do not hold references to this, they can become invalid any time the DOM node can be destroyed.
class nsMenuX : public nsMenuObjectX,
                public nsChangeObserver
{
public:
  nsMenuX();
  virtual ~nsMenuX();

  // If > 0, the OS is indexing all the app's menus (triggered by opening
  // Help menu on Leopard and higher).  There are some things that are
  // unsafe to do while this is happening.
  static PRInt32 sIndexingMenuLevel;

  NS_DECL_CHANGEOBSERVER

  // nsMenuObjectX
  void*             NativeData()     {return (void*)mNativeMenu;}
  nsMenuObjectTypeX MenuObjectType() {return eSubmenuObjectType;}

  // nsMenuX
  nsresult       Create(nsMenuObjectX* aParent, nsMenuBarX* aMenuBar, nsIContent* aNode);
  PRUint32       GetItemCount();
  nsMenuObjectX* GetItemAt(PRUint32 aPos);
  nsresult       GetVisibleItemCount(PRUint32 &aCount);
  nsMenuObjectX* GetVisibleItemAt(PRUint32 aPos);
  nsEventStatus  MenuOpened(const nsMenuEvent& aMenuEvent);
  void           MenuClosed(const nsMenuEvent& aMenuEvent);
  void           SetRebuild(PRBool aMenuEvent);
  NSMenuItem*    NativeMenuItem();

protected:
  void           MenuConstruct();
  nsresult       RemoveAll();
  nsresult       SetEnabled(PRBool aIsEnabled);
  nsresult       GetEnabled(PRBool* aIsEnabled);
  nsresult       SetupIcon();
  void           GetMenuPopupContent(nsIContent** aResult);
  PRBool         OnOpen();
  PRBool         OnOpened();
  PRBool         OnClose();
  PRBool         OnClosed();
  nsresult       AddMenuItem(nsMenuItemX* aMenuItem);
  nsresult       AddMenu(nsMenuX* aMenu);
  void           LoadMenuItem(nsIContent* inMenuItemContent);  
  void           LoadSubMenu(nsIContent* inMenuContent);
  GeckoNSMenu*   CreateMenuWithGeckoString(nsString& menuTitle);

  nsTArray< nsAutoPtr<nsMenuObjectX> > mMenuObjectsArray;
  nsString                  mLabel;
  PRUint32                  mVisibleItemsCount; // cache
  nsMenuObjectX*            mParent; // [weak]
  nsMenuBarX*               mMenuBar; // [weak]
  // The icon object should never outlive its creating nsMenuX object.
  nsRefPtr<nsMenuItemIconX> mIcon;
  GeckoNSMenu*              mNativeMenu; // [strong]
  MenuDelegate*             mMenuDelegate; // [strong]
  // nsMenuX objects should always have a valid native menu item.
  NSMenuItem*               mNativeMenuItem; // [strong]
  PRPackedBool              mIsEnabled;
  PRPackedBool              mDestroyHandlerCalled;
  PRPackedBool              mNeedsRebuild;
  PRPackedBool              mConstructed;
  PRPackedBool              mVisible;
  PRPackedBool              mXBLAttached;
};

#endif // nsMenuX_h_