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 * The Original Code is mozilla.org code.
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#ifndef nsMenuX_h__
#define nsMenuX_h__

#include "nsCOMPtr.h"
#include "nsIMenu.h"
#include "nsSupportsArray.h"
#include "nsIMenuListener.h"
#include "nsIChangeManager.h"
#include "nsWeakReference.h"

#include <Menus.h>
#include <UnicodeConverter.h>
#include <CarbonEvents.h>


class nsIMenuBar;
class nsIMenuListener;


//static PRInt16      mMacMenuIDCount;    // use GetUniqueMenuID()
extern PRInt16 mMacMenuIDCount;// = kMacMenuID;


class nsMenuX : public nsIMenu,
                public nsIMenuListener,
                public nsIChangeObserver,
                public nsSupportsWeakReference
{

public:
    nsMenuX();
    virtual ~nsMenuX();

    NS_DECL_ISUPPORTS
    NS_DECL_NSICHANGEOBSERVER

    // nsIMenuListener methods
    nsEventStatus MenuItemSelected(const nsMenuEvent & aMenuEvent); 
    nsEventStatus MenuSelected(const nsMenuEvent & aMenuEvent); 
    nsEventStatus MenuDeselected(const nsMenuEvent & aMenuEvent); 
    nsEventStatus MenuConstruct( const nsMenuEvent & aMenuEvent, nsIWidget * aParentWindow, 
                                void * menuNode, void * aWebShell);
    nsEventStatus MenuDestruct(const nsMenuEvent & aMenuEvent);
    nsEventStatus CheckRebuild(PRBool & aMenuEvent);
    nsEventStatus SetRebuild(PRBool aMenuEvent);

    // nsIMenu Methods
    NS_IMETHOD Create ( nsISupports * aParent, const nsAReadableString &aLabel, const nsAReadableString &aAccessKey, 
                        nsIChangeManager* aManager, nsIWebShell* aShell, nsIContent* aNode ) ;
    NS_IMETHOD GetParent(nsISupports *&aParent);
    NS_IMETHOD GetLabel(nsString &aText);
    NS_IMETHOD SetLabel(const nsAReadableString &aText);
    NS_IMETHOD GetAccessKey(nsString &aText);
    NS_IMETHOD SetAccessKey(const nsAReadableString &aText);
    NS_IMETHOD AddItem(nsISupports* aText);
    NS_IMETHOD AddSeparator();
    NS_IMETHOD GetItemCount(PRUint32 &aCount);
    NS_IMETHOD GetItemAt(const PRUint32 aPos, nsISupports *& aMenuItem);
    NS_IMETHOD InsertItemAt(const PRUint32 aPos, nsISupports * aMenuItem);
    NS_IMETHOD RemoveItem(const PRUint32 aPos);
    NS_IMETHOD RemoveAll();
    NS_IMETHOD GetNativeData(void** aData);
    NS_IMETHOD SetNativeData(void* aData);
    NS_IMETHOD AddMenuListener(nsIMenuListener * aMenuListener);
    NS_IMETHOD RemoveMenuListener(nsIMenuListener * aMenuListener);
    NS_IMETHOD GetMenuContent(nsIContent ** aMenuNode);
    NS_IMETHOD SetEnabled(PRBool aIsEnabled);
    NS_IMETHOD GetEnabled(PRBool* aIsEnabled);
    NS_IMETHOD IsHelpMenu(PRBool* aIsEnabled);

    // 
    NS_IMETHOD AddMenuItem(nsIMenuItem * aMenuItem);
    NS_IMETHOD AddMenu(nsIMenu * aMenu);

protected:
      // Determines how many menus are visible among the siblings that are before me.
      // It doesn't matter if I am visible.
    nsresult CountVisibleBefore ( PRUint32* outVisibleBefore ) ;

    // fetch the content node associated with the menupopup item
    void GetMenuPopupContent ( nsIContent** aResult ) ;

      // Insert a new item in this menu with index |inItemIndex| with the text |inItemLabel|,
      // middle-truncated to a certain pixel width with an elipsis.
    void InsertMenuItemWithTruncation ( nsAutoString & inItemLabel, 
                                          PRUint32 inItemIndex ) ;
    
    // fire handlers for oncreate/ondestroy
    PRBool OnDestroy() ;
    PRBool OnCreate() ;
    PRBool OnDestroyed() ;
    PRBool OnCreated() ;

    void LoadMenuItem ( nsIMenu* pParentMenu, nsIContent* menuitemContent );  
    void LoadSubMenu ( nsIMenu * pParentMenu, nsIContent* menuitemContent );
    void LoadSeparator ( nsIContent* menuitemContent );

    nsEventStatus HelpMenuConstruct( const nsMenuEvent & aMenuEvent, nsIWidget* aParentWindow, 
                                      void* unused, void* aWebShell);

    MenuHandle NSStringNewMenu(short menuID, nsString& menuTitle);

protected:
    nsString                    mLabel;
    PRUint32                    mNumMenuItems;
    nsSupportsArray             mMenuItemsArray;        // array holds refs

    nsISupports*                mParent;                // weak, my parent owns me
    nsIChangeManager*           mManager;               // weak ref, it will outlive us [menubar]
    nsWeakPtr                   mWebShellWeakRef;       // weak ref to webshell
    nsCOMPtr<nsIContent>        mMenuContent;           // the |menu| tag, strong ref
    nsCOMPtr<nsIMenuListener>   mListener;              // strong ref

    // MacSpecific
    PRInt16                     mMacMenuID;
    MenuHandle                  mMacMenuHandle;
    PRInt16                     mHelpMenuOSItemsCount;
    PRPackedBool                mIsHelpMenu;
    PRPackedBool                mIsEnabled;
    PRPackedBool                mDestroyHandlerCalled;
    PRPackedBool                mNeedsRebuild;
    PRPackedBool                mConstructed;
    PRPackedBool                mVisible;               // are we visible to the user?
    
    EventHandlerRef             mHandler;               // our event handler
};

#endif // nsMenuX_h__