/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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):
 *   John Fairhurst <john_fairhurst@iname.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * 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
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the NPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef TOOLKIT_H      
#define TOOLKIT_H

#include "nsdefs.h"
#include "nsIToolkit.h"

struct MethodInfo;

/**
 * Wrapper around the thread running the message pump.
 * The toolkit abstraction is necessary because the message pump must
 * execute within the same thread that created the widget under Win32.
 */ 

class nsToolkit : public nsIToolkit
{

  public:

            NS_DECL_ISUPPORTS

                            nsToolkit();
            NS_IMETHOD      Init(PRThread *aThread);
            void            CallMethod(MethodInfo *info);
            MRESULT         SendMsg(HWND hwnd, ULONG msg, MPARAM mp1 = 0, MPARAM mp2 = 0);
            // Return whether the current thread is the application's Gui thread.  
            PRBool          IsGuiThread(void)      { return (PRBool)(mGuiThread == PR_GetCurrentThread());}
            PRThread*       GetGuiThread(void)       { return mGuiThread;   }
            HWND            GetDispatchWindow(void)  { return mDispatchWnd; }
            void            CreateInternalWindow(PRThread *aThread);

private:
                            ~nsToolkit();
            void            CreateUIThread(void);

public:

protected:
    // Handle of the window used to receive dispatch messages.
    HWND        mDispatchWnd;
    // Thread Id of the "main" Gui thread.
    PRThread    *mGuiThread;
    // Monitor used to coordinate dispatch
    PRMonitor *mMonitor;
};

// Window procedure for the internal window
static MRESULT EXPENTRY nsToolkitWindowProc(HWND, ULONG, MPARAM, MPARAM);

#define WM_CALLMETHOD   (WM_USER+1)
#define WM_SENDMSG      (WM_USER+2)

struct SendMsgStruct
{
   HWND    hwnd;
   ULONG   msg;
   MPARAM  mp1, mp2;
   MRESULT rc;

   PRMonitor *pMonitor;

   SendMsgStruct( HWND h, ULONG m, MPARAM p1, MPARAM p2, PRMonitor *pMon)
        : hwnd( h), msg( m), mp1( p1), mp2( p2), rc( 0), pMonitor( pMon)
   {}
};

#endif  // TOOLKIT_H