/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
/*
 * 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 Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

#include "nsAppShell.h"
#include "nsIWidget.h"
#include "nsIEventQueueService.h"
#include "nsIServiceManager.h"
#include <windows.h>

static NS_DEFINE_IID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);

NS_IMPL_ISUPPORTS(nsAppShell, NS_IAPPSHELL_IID) 

//-------------------------------------------------------------------------
//
// nsAppShell constructor
//
//-------------------------------------------------------------------------
nsAppShell::nsAppShell()  
{ 
  NS_INIT_REFCNT();
  mDispatchListener = 0;
}



//-------------------------------------------------------------------------
//
// Create the application shell
//
//-------------------------------------------------------------------------

NS_METHOD nsAppShell::Create(int* argc, char ** argv)
{
  return NS_OK;
}

//-------------------------------------------------------------------------
NS_METHOD nsAppShell::SetDispatchListener(nsDispatchListener* aDispatchListener) 
{
  mDispatchListener = aDispatchListener;
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Enter a message handler loop
//
//-------------------------------------------------------------------------

NS_METHOD nsAppShell::Run(void)
{
  NS_ADDREF_THIS();
  MSG  msg;
  int  keepGoing = 1;
  
  // Process messages
  do {
    // Give priority to system messages (in particular keyboard, mouse,
    // timer, and paint messages).
    // Note: on Win98 and NT 5.0 we can also use PM_QS_INPUT and PM_QS_PAINT flags.
    if (::PeekMessage(&msg, NULL, 0, WM_USER-1, PM_REMOVE) || 
      ::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {

      keepGoing = (msg.message != WM_QUIT);

      if (keepGoing != 0) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
        if (mDispatchListener)
          mDispatchListener->AfterDispatch();
      }
    } else {
       // Block and wait for any posted application message
      ::WaitMessage();
    }

  } while (keepGoing != 0);
  Release();
  return msg.wParam;
}

inline NS_METHOD nsAppShell::Spinup(void)
{ return NS_OK; }

inline NS_METHOD nsAppShell::Spindown(void)
{ return NS_OK; }

inline NS_METHOD nsAppShell::ListenToEventQueue(nsIEventQueue * aQueue, PRBool aListen)
{ return NS_OK; }

NS_METHOD
nsAppShell::GetNativeEvent(PRBool &aRealEvent, void *&aEvent)
{
  static MSG msg;

  BOOL isOK = GetMessage(&msg, NULL, 0, 0);
#ifdef DEBUG_danm
  if (msg.message != WM_TIMER)
    printf("-> %d", msg.message);
#endif

  if (isOK) {
    TranslateMessage(&msg);
    aEvent = &msg;
    aRealEvent = PR_TRUE;
    return NS_OK;
  }
  aRealEvent = PR_FALSE;
  return NS_ERROR_FAILURE;
}

nsresult nsAppShell::DispatchNativeEvent(PRBool aRealEvent, void *aEvent)
{
  DispatchMessage((MSG *)aEvent);
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Exit a message handler loop
//
//-------------------------------------------------------------------------

NS_METHOD nsAppShell::Exit(void)
{
  PostQuitMessage(0);
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// nsAppShell destructor
//
//-------------------------------------------------------------------------
nsAppShell::~nsAppShell()
{
}