gecko-dev/widget/src/windows/nsWindow.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * 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): 
 *   Michael Lowe <michael.lowe@bigfoot.com>
 *   Pierre Phaneuf <pp@ludusdesign.com>
 *   Robert O'Callahan <roc+moz@cs.cmu.edu>
 *   
 */

#if defined(DEBUG_ftang)
//#define KE_DEBUG
//#define DEBUG_IME
//#define DEBUG_IME2
//#define DEBUG_KBSTATE
#endif

#include "nsWindow.h"
#include "nsIAppShell.h"
#include "nsIFontMetrics.h"
#include "nsFont.h"
#include "nsGUIEvent.h"
#include "nsIRenderingContext.h"
#include "nsIDeviceContext.h"
#include "nsRect.h"
#include "nsTransform2D.h"
#include "nsStringUtil.h"
#include <windows.h>
//#include <winuser.h>
#include <zmouse.h>
//#include "sysmets.h"
#include "nsGfxCIID.h"
#include "resource.h"
#include <commctrl.h>
#include "prtime.h"
#include "nsIRenderingContextWin.h"

#include <imm.h>
#ifdef MOZ_AIMM
#include "aimm.h"
#endif // MOZ_AIMM

#include "nsNativeDragTarget.h"
#include "nsIRollupListener.h"
#include "nsIRegion.h"

//~~~ windowless plugin support
#include "nsplugindefs.h"

// For clipboard support
#include "nsIServiceManager.h"
#include "nsIClipboard.h"
#include "nsWidgetsCID.h"

#include "nsITimer.h"
#include "nsITimerQueue.h"

static NS_DEFINE_CID(kCClipboardCID,       NS_CLIPBOARD_CID);
static NS_DEFINE_IID(kRenderingContextCID, NS_RENDERING_CONTEXT_CID);
static NS_DEFINE_CID(kTimerManagerCID, NS_TIMERMANAGER_CID);


BOOL nsWindow::sIsRegistered = FALSE;
UINT nsWindow::uMSH_MOUSEWHEEL = 0;

////////////////////////////////////////////////////
static nsIRollupListener * gRollupListener           = nsnull;
static nsIWidget         * gRollupWidget             = nsnull;
static PRBool              gRollupConsumeRollupEvent = PR_FALSE;

nsWindow* nsWindow::gCurrentWindow = nsnull;

#if 0
// #ifdef KE_DEBUG
static PRBool is_vk_down(int vk)
{
   SHORT st = GetKeyState(vk);
   printf("is_vk_down vk=%x st=%x\n",vk, st);
   return (st & 0x80) ? PR_TRUE : PR_FALSE;
}
#define IS_VK_DOWN is_vk_down
#else
#define IS_VK_DOWN(a) (PRBool)(((GetKeyState(a) & 0x80)) ? (PR_TRUE) : (PR_FALSE))
#endif


// Global variable 
//     g_hinst - handle of the application instance 
extern HINSTANCE g_hinst; 

//
// input method offsets
//
#define IME_X_OFFSET	0
#define IME_Y_OFFSET	0



#define IS_IME_CODEPAGE(cp) ((932==(cp))||(936==(cp))||(949==(cp))||(950==(cp)))

//
// Macro for Active Input Method Manager (AIMM) support.
// Use AIMM method instead of Win32 Imm APIs.
//
#ifdef MOZ_AIMM

#define NS_IMM_GETCOMPOSITIONSTRING(hIMC, dwIndex, pBuf, dwBufLen, compStrLen) \
{ \
  compStrLen = 0; \
  if (nsToolkit::gAIMMApp) \
    nsToolkit::gAIMMApp->GetCompositionStringA(hIMC, dwIndex, dwBufLen, &(compStrLen), pBuf); \
  else \
    compStrLen = ::ImmGetCompositionStringA(hIMC, dwIndex, pBuf, dwBufLen); \
}

#define NS_IMM_GETCONTEXT(hWnd, hIMC) \
  { \
    hIMC = NULL; \
    if (nsToolkit::gAIMMApp) \
      nsToolkit::gAIMMApp->GetContext(hWnd, &(hIMC)); \
    else \
      hIMC = ::ImmGetContext(hWnd); \
  }

#define NS_IMM_GETCONVERSIONSTATUS(hIMC, pfdwConversion, pfdwSentence) \
  (nsToolkit::gAIMMApp ? \
    (nsToolkit::gAIMMApp->GetConversionStatus(hIMC, pfdwConversion, pfdwSentence) == S_OK) : \
    (::ImmGetConversionStatus(hIMC, pfdwConversion, pfdwSentence)))

#define NS_IMM_RELEASECONTEXT(hWnd, hIMC) \
  { \
    if (nsToolkit::gAIMMApp) \
      nsToolkit::gAIMMApp->ReleaseContext(hWnd, hIMC); \
    else \
      ::ImmReleaseContext(hWnd, hIMC); \
  }

#define NS_IMM_NOTIFYIME(hIMC, dwAction, dwIndex, dwValue) \
  (nsToolkit::gAIMMApp ? \
    (nsToolkit::gAIMMApp->NotifyIME(hIMC, dwAction, dwIndex, dwValue) == S_OK) :	\
    (::ImmNotifyIME(hIMC, dwAction, dwIndex, dwValue)))

#define NS_IMM_SETCANDIDATEWINDOW(hIMC, candForm) \
  (nsToolkit::gAIMMApp ? \
    (nsToolkit::gAIMMApp->SetCandidateWindow(hIMC, candForm) == S_OK) : \
    (::ImmSetCandidateWindow(hIMC, candForm)))

#define NS_IMM_SETCONVERSIONSTATUS(hIMC, pfdwConversion, pfdwSentence) \
  (nsToolkit::gAIMMApp ? \
    (nsToolkit::gAIMMApp->SetConversionStatus(hIMC, (pfdwConversion), (pfdwSentence)) == S_OK) : \
    (::ImmSetConversionStatus(hIMC, (pfdwConversion), (pfdwSentence))))

#else /* !MOZ_AIMM */

#define NS_IMM_GETCOMPOSITIONSTRING(hIMC, dwIndex, pBuf, dwBufLen, compStrLen) \
  { compStrLen = ::ImmGetCompositionString(hIMC, dwIndex, pBuf, dwBufLen); }

#define NS_IMM_GETCONTEXT(hWnd, hIMC) \
  { hIMC = ::ImmGetContext(hWnd); }

#define NS_IMM_GETCONVERSIONSTATUS(hIMC, lpfdwConversion, lpfdwSentence) \
  (::ImmGetConversionStatus(hIMC, (lpfdwConversion), (lpfdwSentence)))

#define NS_IMM_RELEASECONTEXT(hWnd, hIMC) \
  { ::ImmReleaseContext(hWnd, hIMC); }

#define NS_IMM_NOTIFYIME(hIMC, dwAction, dwIndex, dwValue) \
  (::ImmNotifyIME(hIMC, dwAction, dwIndex, dwValue))

#define NS_IMM_SETCANDIDATEWINDOW(hIMC, candForm) \
  (::ImmSetCandidateWindow(hIMC, candForm))

#define NS_IMM_SETCONVERSIONSTATUS(hIMC, lpfdwConversion, lpfdwSentence) \
  (::ImmSetConversionStatus(hIMC, (lpfdwConversion), (lpfdwSentence)))

#endif /* MOZ_AIMM */


static PRBool LangIDToCP(WORD aLangID, UINT& oCP)
{
	int localeid=MAKELCID(aLangID,SORT_DEFAULT);
	int numchar=GetLocaleInfo(localeid,LOCALE_IDEFAULTANSICODEPAGE,NULL,0);
        char cp_on_stack[32];

	char* cp_name;
        if(numchar > 32)
           cp_name  = new char[numchar];
        else 
           cp_name = cp_on_stack;
	if (cp_name) {
           GetLocaleInfo(localeid,LOCALE_IDEFAULTANSICODEPAGE,cp_name,numchar);
           oCP = atoi(cp_name);
           if(cp_name != cp_on_stack)
               delete [] cp_name;
           return PR_TRUE;
	} else {
           oCP = CP_ACP;
           return PR_FALSE;
        }
}

//-------------------------------------------------------------------------
//
// nsISupport stuff
//
//-------------------------------------------------------------------------
NS_IMPL_ADDREF(nsWindow)
NS_IMPL_RELEASE(nsWindow)
NS_IMETHODIMP nsWindow::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
    if (NULL == aInstancePtr) {
        return NS_ERROR_NULL_POINTER;
    }

    if (aIID.Equals(NS_GET_IID(nsIKBStateControl))) {
        *aInstancePtr = (void*) ((nsIKBStateControl*)this);
    	NS_ADDREF((nsBaseWidget*)this);
        // NS_ADDREF_THIS();
        return NS_OK;
    }

    return nsBaseWidget::QueryInterface(aIID,aInstancePtr);
}
//-------------------------------------------------------------------------
//
// nsWindow constructor
//
//-------------------------------------------------------------------------
nsWindow::nsWindow() : nsBaseWidget()
{
    NS_INIT_REFCNT();
    mWnd                = 0;
    mPrevWndProc        = NULL;
    mBackground         = ::GetSysColor(COLOR_BTNFACE);
    mBrush              = ::CreateSolidBrush(NSRGB_2_COLOREF(mBackground));
    mForeground         = ::GetSysColor(COLOR_WINDOWTEXT);
    mPalette            = NULL;
    mIsShiftDown        = PR_FALSE;
    mIsControlDown      = PR_FALSE;
    mIsAltDown          = PR_FALSE;
    mIsDestroying       = PR_FALSE;
    mOnDestroyCalled    = PR_FALSE;
    mDeferredPositioner = NULL;
    mLastPoint.x        = 0;
    mLastPoint.y        = 0;
    mPreferredWidth     = 0;
    mPreferredHeight    = 0;
    mFont               = nsnull;
    mIsVisible          = PR_FALSE;
    mHas3DBorder        = PR_FALSE;
    mWindowType         = eWindowType_child;
    mBorderStyle        = eBorderStyle_default;
    mBorderlessParent   = 0;
   
    mIsInMouseCapture   = PR_FALSE;

	  mIMEProperty		= 0;
	  mIMEIsComposing		= PR_FALSE;
	  mIMECompString = NULL;
	  mIMECompUnicode = NULL;
	  mIMEAttributeString = NULL;
	  mIMEAttributeStringSize = 0;
	  mIMEAttributeStringLength = 0;
	  mIMECompClauseString = NULL;
	  mIMECompClauseStringSize = 0;
	  mIMECompClauseStringLength = 0;

   static BOOL gbInitHKL = FALSE;
   if(! gbInitHKL)
   {
     gbInitHKL = TRUE;
     gKeyboardLayout = GetKeyboardLayout(0);
     LangIDToCP((WORD)(0x0FFFFL & (DWORD)gKeyboardLayout), gCurrentKeyboardCP);
   }

  mNativeDragTarget = nsnull;
  mIsTopWidgetWindow = PR_FALSE;
 
  if (!nsWindow::uMSH_MOUSEWHEEL)
    nsWindow::uMSH_MOUSEWHEEL = RegisterWindowMessage(MSH_MOUSEWHEEL);
}


HKL nsWindow::gKeyboardLayout = 0;
UINT nsWindow::gCurrentKeyboardCP = 0;

//-------------------------------------------------------------------------
//
// nsWindow destructor
//
//-------------------------------------------------------------------------
nsWindow::~nsWindow()
{
  mIsDestroying = PR_TRUE;
  if (gCurrentWindow == this) {
    gCurrentWindow = nsnull;
  }

  MouseTrailer * mouseTrailer = MouseTrailer::GetMouseTrailer(0);
  if (mouseTrailer->GetMouseTrailerWindow() == this) {
    mouseTrailer->DestroyTimer();
  } 

  // If the widget was released without calling Destroy() then the native
  // window still exists, and we need to destroy it
  if (NULL != mWnd) {
    Destroy();
  }

  //XXX Temporary: Should not be caching the font
  delete mFont;

  //
  // delete any of the IME structures that we allocated
  //
  if (mIMECompString!=NULL) 
	nsCString::Recycle(mIMECompString);
  if (mIMECompUnicode!=NULL) 
	nsString::Recycle(mIMECompUnicode);
  if (mIMEAttributeString!=NULL) 
	delete [] mIMEAttributeString;
  if (mIMECompClauseString!=NULL) 
	delete [] mIMECompClauseString;

  NS_IF_RELEASE(mNativeDragTarget);
}


NS_METHOD nsWindow::CaptureMouse(PRBool aCapture)
{
  if (PR_TRUE == aCapture) { 
    MouseTrailer::SetCaptureWindow(this);
    ::SetCapture(mWnd);
  } else {
    MouseTrailer::SetCaptureWindow(NULL);
    ::ReleaseCapture();
  }
  mIsInMouseCapture = aCapture;
  return NS_OK;
}


//-------------------------------------------------------------------------
//
// Default for height modification is to do nothing
//
//-------------------------------------------------------------------------

PRInt32 nsWindow::GetHeight(PRInt32 aProposedHeight)
{
  return(aProposedHeight);
}

//-------------------------------------------------------------------------
//
// Deferred Window positioning
//
//-------------------------------------------------------------------------

NS_METHOD nsWindow::BeginResizingChildren(void)
{
  if (NULL == mDeferredPositioner)
    mDeferredPositioner = ::BeginDeferWindowPos(1);
  return NS_OK;
}

NS_METHOD nsWindow::EndResizingChildren(void)
{
  if (NULL != mDeferredPositioner) {
    ::EndDeferWindowPos(mDeferredPositioner);
    mDeferredPositioner = NULL;
  }
  return NS_OK;
}

NS_METHOD nsWindow::WidgetToScreen(const nsRect& aOldRect, nsRect& aNewRect)
{
  POINT point;
  point.x = aOldRect.x;
  point.y = aOldRect.y;
  ::ClientToScreen((HWND)GetNativeData(NS_NATIVE_WINDOW), &point);
  aNewRect.x = point.x;
  aNewRect.y = point.y;
  aNewRect.width = aOldRect.width;
  aNewRect.height = aOldRect.height;
  return NS_OK;
}

NS_METHOD nsWindow::ScreenToWidget(const nsRect& aOldRect, nsRect& aNewRect)
{
  POINT point;
  point.x = aOldRect.x;
  point.y = aOldRect.y;
  ::ScreenToClient((HWND)GetNativeData(NS_NATIVE_WINDOW), &point);
  aNewRect.x = point.x;
  aNewRect.y = point.y;
  aNewRect.width = aOldRect.width;
  aNewRect.height = aOldRect.height;
  return NS_OK;
} 

//-------------------------------------------------------------------------
//
// Convert nsEventStatus value to a windows boolean
//
//-------------------------------------------------------------------------

PRBool nsWindow::ConvertStatus(nsEventStatus aStatus)
{
  switch(aStatus) {
  case nsEventStatus_eIgnore:
    return PR_FALSE;
  case nsEventStatus_eConsumeNoDefault:
    return PR_TRUE;
  case nsEventStatus_eConsumeDoDefault:
    return PR_FALSE;
  default:
    NS_ASSERTION(0, "Illegal nsEventStatus enumeration value");
    break;
  }
  return PR_FALSE;
}

//-------------------------------------------------------------------------
//
// Initialize an event to dispatch
//
//-------------------------------------------------------------------------
void nsWindow::InitEvent(nsGUIEvent& event, PRUint32 aEventType, nsPoint* aPoint)
{
    event.widget = this;
    NS_ADDREF(event.widget);

    if (nsnull == aPoint) {     // use the point from the event
      // get the message position in client coordinates and in twips
      DWORD pos = ::GetMessagePos();
      POINT cpos;

      cpos.x = LOWORD(pos);
      cpos.y = HIWORD(pos);

      if (mWnd != NULL) {
        ::ScreenToClient(mWnd, &cpos);
        event.point.x = cpos.x;
        event.point.y = cpos.y;
      } else {
        event.point.x = 0;
        event.point.y = 0;
      }
    }
    else {                      // use the point override if provided
      event.point.x = aPoint->x;
      event.point.y = aPoint->y;
    }

    event.time = ::GetMessageTime();
    event.message = aEventType;

    mLastPoint.x = event.point.x;
    mLastPoint.y = event.point.y;
}

//-------------------------------------------------------------------------
//
// Invokes callback and  ProcessEvent method on Event Listener object
//
//-------------------------------------------------------------------------

NS_IMETHODIMP nsWindow::DispatchEvent(nsGUIEvent* event, nsEventStatus & aStatus)
{
#ifdef NS_DEBUG
  debug_DumpEvent(stdout,
                  event->widget,
                  event,
                  "something",
                  (PRInt32) mWnd);
#endif // NS_DEBUG

  aStatus = nsEventStatus_eIgnore;
 
  if (nsnull != mEventCallback) {
    aStatus = (*mEventCallback)(event);
  }

    // Dispatch to event listener if event was not consumed
  if ((aStatus != nsEventStatus_eIgnore) && (nsnull != mEventListener)) {
    aStatus = mEventListener->ProcessEvent(*event);
  }

  // the window can be destroyed during processing of seemingly innocuous events like, say,
  // mousedowns due to the magic of scripting. mousedowns will return nsEventStatus_eIgnore,
  // which causes problems with the deleted window. therefore:
  if (mOnDestroyCalled)
    aStatus = nsEventStatus_eConsumeNoDefault;
  return NS_OK;
}

//-------------------------------------------------------------------------
PRBool nsWindow::DispatchWindowEvent(nsGUIEvent* event)
{
  nsEventStatus status;
  DispatchEvent(event, status);
  return ConvertStatus(status);
}

PRBool nsWindow::DispatchWindowEvent(nsGUIEvent*event, nsEventStatus &aStatus) {
  DispatchEvent(event, aStatus);
  return ConvertStatus(aStatus);
}

//-------------------------------------------------------------------------
//
// Dispatch standard event
//
//-------------------------------------------------------------------------

PRBool nsWindow::DispatchStandardEvent(PRUint32 aMsg)
{
  nsGUIEvent event;
  event.eventStructType = NS_GUI_EVENT;
  InitEvent(event, aMsg);

  PRBool result = DispatchWindowEvent(&event);
  NS_RELEASE(event.widget);
  return result;
}

//-------------------------------------------------------------------------
NS_IMETHODIMP nsWindow::CaptureRollupEvents(nsIRollupListener * aListener, 
                                            PRBool aDoCapture, 
                                            PRBool aConsumeRollupEvent)
{
  if (aDoCapture) {
    /* we haven't bothered carrying a weak reference to gRollupWidget because
       we believe lifespan is properly scoped. this next assertion helps
       assure that remains true. */
    NS_ASSERTION(!gRollupWidget, "rollup widget reassigned before release");
    gRollupConsumeRollupEvent = aConsumeRollupEvent;
    NS_IF_RELEASE(gRollupListener);
    NS_IF_RELEASE(gRollupWidget);
    gRollupListener = aListener;
    NS_ADDREF(aListener);
    gRollupWidget = this;
    NS_ADDREF(this);
  } else {
    NS_IF_RELEASE(gRollupListener);
    //gRollupListener = nsnull;
    NS_IF_RELEASE(gRollupWidget);
  }

  return NS_OK;
}

PRBool 
nsWindow::EventIsInsideWindow(nsWindow* aWindow) 
{
  RECT r;
  ::GetWindowRect(aWindow->mWnd, &r);
  DWORD pos = ::GetMessagePos();
  POINT mp;
  mp.x = LOWORD(pos);
  mp.y = HIWORD(pos);
  // now make sure that it wasn't one of our children
  if (mp.x < r.left || mp.x > r.right ||
      mp.y < r.top || mp.y > r.bottom) {
    return PR_FALSE;
  } 

  return PR_TRUE;
}


PRBool
nsWindow::IsScrollbar(HWND aWnd) {

   // Make sure this is one of our windows by comparing the window procedures
  LONG proc = ::GetWindowLong(aWnd, GWL_WNDPROC);
  if (proc == (LONG)&nsWindow::WindowProc) {
    // It is a one of our windows.
    nsWindow *someWindow = (nsWindow*)::GetWindowLong(aWnd, GWL_USERDATA);
      //This is inefficient, but this method is only called when
      //a popup window has been displayed, and your clicking within it.
      //The default window class begins with Netscape so comparing with the initial
      //S in SCROLLBAR will cause strcmp to immediately return.
    if (strcmp(someWindow->WindowClass(),"SCROLLBAR") == 0) {
      return PR_TRUE;
    }
  } 

  return PR_FALSE;
}

//-------------------------------------------------------------------------
//
// the nsWindow procedure for all nsWindows in this toolkit
//
//-------------------------------------------------------------------------
LRESULT CALLBACK nsWindow::WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
     // check to see if we have a rollup listener registered
    if (nsnull != gRollupListener && nsnull != gRollupWidget) {
  
       // All mouse wheel events cause the popup to rollup.
       // XXX: Need something more reliable then WM_MOUSEWHEEL.
       // This event is not always generated. The mouse wheel
       // is plugged into the scrollbar scrolling in odd ways
       // which make it difficult to find a message which will
       // reliably be generated when the mouse wheel changes position
      if ((msg == WM_MOUSEWHEEL) || (msg == uMSH_MOUSEWHEEL)) {
        gRollupListener->Rollup();
        return TRUE;
      }
      
      if (msg == WM_ACTIVATE || msg == WM_NCLBUTTONDOWN || msg == WM_LBUTTONDOWN ||
        msg == WM_RBUTTONDOWN || msg == WM_MBUTTONDOWN || 
        msg == WM_NCMBUTTONDOWN || msg == WM_NCRBUTTONDOWN) {
        // Rollup if the event is outside the popup
        if (PR_FALSE == nsWindow::EventIsInsideWindow((nsWindow*)gRollupWidget)) {
          gRollupListener->Rollup();
          // return TRUE tells Windows that the event is consumed, 
          // false allows the event to be dispatched
          //
          // So if we are NOT supposed to be consuming events, let it go through
          if (gRollupConsumeRollupEvent) {
            return TRUE;
          } 
        }
      }

      if ((msg == WM_MOUSEACTIVATE) && (nsWindow::EventIsInsideWindow((nsWindow*)gRollupWidget))) {
        // Prevent the click inside the popup from causing a change in window
        // activation. Since the popup is shown non-activated, we need to eat 
        // any requests to activate the window while it is displayed. Windows 
        // will automatically activate the popup on the mousedown otherwise.
        return MA_NOACTIVATE;
      }
    }

    // Get the window which caused the event and ask it to process the message
    nsWindow *someWindow = (nsWindow*)::GetWindowLong(hWnd, GWL_USERDATA);

    // hold on to the window for the life of this method, in case it gets
    // deleted during processing. yes, it's a double hack, since someWindow
    // is not really an interface.
    nsCOMPtr<nsISupports> kungFuDeathGrip;
    if (!someWindow->mIsDestroying) // not if we're in the destructor!
      kungFuDeathGrip = do_QueryInterface((nsBaseWidget*)someWindow);

    // Re-direct a tab change message destined for its parent window to the
    // the actual window which generated the event.
    if (msg == WM_NOTIFY) {
      LPNMHDR pnmh = (LPNMHDR) lParam;
      if (pnmh->code == TCN_SELCHANGE) {
        someWindow = (nsWindow*)::GetWindowLong(pnmh->hwndFrom, GWL_USERDATA);
      }
    }

    if (nsnull != someWindow) {
        LRESULT retValue;
        if (PR_TRUE == someWindow->ProcessMessage(msg, wParam, lParam, &retValue)) {
            return retValue;
        }
    }

#if defined(STRICT)
    return ::CallWindowProc((WNDPROC)someWindow->GetPrevWindowProc(), hWnd, 
                            msg, wParam, lParam);
#else
    return ::CallWindowProc((FARPROC)someWindow->GetPrevWindowProc(), hWnd, 
                            msg, wParam, lParam);
#endif
}

#ifdef MOZ_AIMM
//
// Default Window proceduer for AIMM support.
//
LRESULT CALLBACK nsWindow::DefaultWindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  if(nsToolkit::gAIMMApp)
  {
    LRESULT lResult;
    if (nsToolkit::gAIMMApp->OnDefWindowProc(hWnd, msg, wParam, lParam, &lResult) == S_OK)
      return lResult;
  }
  return ::DefWindowProc(hWnd, msg, wParam, lParam);
}
#endif

//WINOLEAPI oleStatus;
//-------------------------------------------------------------------------
//
// Utility method for implementing both Create(nsIWidget ...) and
// Create(nsNativeWidget...)
//-------------------------------------------------------------------------
// This is needed for drag & drop & Clipboard support
BOOL gOLEInited = FALSE;

nsresult nsWindow::StandardWindowCreate(nsIWidget *aParent,
                      const nsRect &aRect,
                      EVENT_CALLBACK aHandleEventFunction,
                      nsIDeviceContext *aContext,
                      nsIAppShell *aAppShell,
                      nsIToolkit *aToolkit,
                      nsWidgetInitData *aInitData,
                      nsNativeWidget aNativeParent)
{
    nsIWidget *baseParent = aInitData &&
                 (aInitData->mWindowType == eWindowType_dialog ||
                  aInitData->mWindowType == eWindowType_toplevel) ?
                  nsnull : aParent;

    mIsTopWidgetWindow = (nsnull == baseParent);

    BaseCreate(baseParent, aRect, aHandleEventFunction, aContext, 
       aAppShell, aToolkit, aInitData);

    // Switch to the "main gui thread" if necessary... This method must
    // be executed on the "gui thread"...
  
    nsToolkit* toolkit = (nsToolkit *)mToolkit;
    if (toolkit) {
    if (!toolkit->IsGuiThread()) {
        DWORD args[7];
        args[0] = (DWORD)aParent;
        args[1] = (DWORD)&aRect;
        args[2] = (DWORD)aHandleEventFunction;
        args[3] = (DWORD)aContext;
        args[4] = (DWORD)aAppShell;
        args[5] = (DWORD)aToolkit;
        args[6] = (DWORD)aInitData;

        if (nsnull != aParent) {
           // nsIWidget parent dispatch
          MethodInfo info(this, nsWindow::CREATE, 7, args);
          toolkit->CallMethod(&info);
           return NS_OK;
        }
        else {
            // Native parent dispatch
          MethodInfo info(this, nsWindow::CREATE_NATIVE, 5, args);
          toolkit->CallMethod(&info);
          return NS_OK;
        }
    }
    }
 
    HWND parent;
    if (nsnull != aParent) { // has a nsIWidget parent
      parent = ((aParent) ? (HWND)aParent->GetNativeData(NS_NATIVE_WINDOW) : nsnull);
    } else { // has a nsNative parent
       parent = (HWND)aNativeParent;
    }

    if (nsnull != aInitData) {
      SetWindowType(aInitData->mWindowType);
      SetBorderStyle(aInitData->mBorderStyle);
    }

    DWORD style = WindowStyle();
    DWORD extendedStyle = WindowExStyle();

    if (mWindowType == eWindowType_popup) {
      mBorderlessParent = parent;
      // Don't set the parent of a popup window. 
      parent = NULL;
    } else if (nsnull != aInitData) {
      // See if the caller wants to explictly set clip children and clip siblings
      if (aInitData->clipChildren) {
        style |= WS_CLIPCHILDREN;
      } else {
        style &= ~WS_CLIPCHILDREN;
      }
      if (aInitData->clipSiblings) {
        style |= WS_CLIPSIBLINGS;
      }
    }

    mHas3DBorder = (extendedStyle & WS_EX_CLIENTEDGE) > 0;

    mWnd = ::CreateWindowEx(extendedStyle,
                            WindowClass(),
                            "",
                            style,
                            aRect.x,
                            aRect.y,
                            aRect.width,
                            GetHeight(aRect.height),
                            parent,
                            NULL,
                            nsToolkit::mDllInstance,
                            NULL);
   
    VERIFY(mWnd);

    // Initial Drag & Drop Work
   if (!gOLEInited) {
     DWORD dwVer = ::OleBuildVersion();

     if (FAILED(::OleInitialize(NULL))){
       printf("***** OLE has not been initialized!\n");
     } else {
       //if defined(DEBUG) printf("***** OLE has been initialized!\n");
     }
     gOLEInited = TRUE;
   }

   /*mNativeDragTarget = new nsNativeDragTarget(this);
   if (NULL != mNativeDragTarget) {
     mNativeDragTarget->AddRef();
     if (S_OK == ::CoLockObjectExternal((LPUNKNOWN)mNativeDragTarget,TRUE,FALSE)) {
       if (S_OK == ::RegisterDragDrop(mWnd, (LPDROPTARGET)mNativeDragTarget)) {
       }
     }
   }*/


    // call the event callback to notify about creation

    DispatchStandardEvent(NS_CREATE);
    SubclassWindow(TRUE);
    return(NS_OK);
}

//-------------------------------------------------------------------------
//
// Create the proper widget
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Create(nsIWidget *aParent,
                      const nsRect &aRect,
                      EVENT_CALLBACK aHandleEventFunction,
                      nsIDeviceContext *aContext,
                      nsIAppShell *aAppShell,
                      nsIToolkit *aToolkit,
                      nsWidgetInitData *aInitData)
{
    return(StandardWindowCreate(aParent, aRect, aHandleEventFunction,
                         aContext, aAppShell, aToolkit, aInitData,
                         nsnull));
}


//-------------------------------------------------------------------------
//
// create with a native parent
//
//-------------------------------------------------------------------------

NS_METHOD nsWindow::Create(nsNativeWidget aParent,
                         const nsRect &aRect,
                         EVENT_CALLBACK aHandleEventFunction,
                         nsIDeviceContext *aContext,
                         nsIAppShell *aAppShell,
                         nsIToolkit *aToolkit,
                         nsWidgetInitData *aInitData)
{
    return(StandardWindowCreate(nsnull, aRect, aHandleEventFunction,
                         aContext, aAppShell, aToolkit, aInitData,
                         aParent));
}


//-------------------------------------------------------------------------
//
// Close this nsWindow
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Destroy()
{
  // Switch to the "main gui thread" if necessary... This method must
  // be executed on the "gui thread"...
  nsToolkit* toolkit = (nsToolkit *)mToolkit;
  if (toolkit != nsnull && !toolkit->IsGuiThread()) {
    MethodInfo info(this, nsWindow::DESTROY);
    toolkit->CallMethod(&info);
    return NS_ERROR_FAILURE;
  }

  // disconnect from the parent
  if (!mIsDestroying) {
    nsBaseWidget::Destroy();
  }

  EnableDragDrop(PR_FALSE);

  // destroy the HWND
  if (mWnd) {
    // prevent the widget from causing additional events
    mEventCallback = nsnull;
    VERIFY(::DestroyWindow(mWnd));
    mWnd = NULL;
    //our windows can be subclassed by
    //others and these namless, faceless others
    //may not let us know about WM_DESTROY. so,
    //if OnDestroy() didn't get called, just call
    //it now. MMP
    if (PR_FALSE == mOnDestroyCalled)
      OnDestroy();
  }

  return NS_OK;
}


//-------------------------------------------------------------------------
//
// Get this nsWindow parent
//
//-------------------------------------------------------------------------
nsIWidget* nsWindow::GetParent(void)
{
    if (mIsTopWidgetWindow) {
       // Must use a flag instead of mWindowType to tell if the window is the 
       // owned by the topmost widget, because a child window can be embedded inside
       // a HWND which is not associated with a nsIWidget.
      return nsnull;
    }


    nsWindow* widget = nsnull;
    if (mWnd) {
        HWND parent = ::GetParent(mWnd);
        if (parent) {
            widget = (nsWindow *)::GetWindowLong(parent, GWL_USERDATA);
            if (widget) {
              // If the widget is in the process of being destroyed then
              // do NOT return it
              if (widget->mIsDestroying) {
                widget = nsnull;
              } else {
                NS_ADDREF(widget);
              }
            }
        }
    }

    return (nsIWidget*)widget;
}


//-------------------------------------------------------------------------
//
// Hide or show this component
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Show(PRBool bState)
{
    if (mWnd) {
        if (bState) {
          DWORD flags = SWP_NOSIZE | SWP_NOMOVE | SWP_SHOWWINDOW;
          if ((mIsVisible) || (mWindowType == eWindowType_popup)) {
             flags |= SWP_NOZORDER;
          }

          if (mWindowType == eWindowType_popup) {
            flags |= SWP_NOACTIVATE;
            ::SetWindowPos(mWnd, HWND_TOPMOST, 0, 0, 0, 0, flags);
          } else {
            ::SetWindowPos(mWnd, HWND_TOP, 0, 0, 0, 0, flags);
          }
        }
        else
            ::ShowWindow(mWnd, SW_HIDE);
    }
    mIsVisible = bState;
    return NS_OK;
}

//-------------------------------------------------------------------------
//
// Return PR_TRUE if the whether the component is visible, PR_FALSE otherwise
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::IsVisible(PRBool & bState)
{
  bState = mIsVisible;
  return NS_OK;
}

//-------------------------------------------------------------------------
// Return PR_TRUE in aForWindow if the given event should be processed
// assuming this is a modal window.
//-------------------------------------------------------------------------
NS_METHOD nsWindow::ModalEventFilter(PRBool aRealEvent, void *aEvent,
                                     PRBool *aForWindow)
{
  if (!aRealEvent) {
    *aForWindow = PR_FALSE;
    return NS_OK;
  }
#if 0
  // this version actually works, but turns out to be unnecessary
  // if we use the OS properly.
  MSG *msg = (MSG *) aEvent;

  switch (msg->message) {
     case WM_MOUSEMOVE:
     case WM_LBUTTONDOWN:
     case WM_LBUTTONUP:
     case WM_LBUTTONDBLCLK:
     case WM_MBUTTONDOWN:
     case WM_MBUTTONUP:
     case WM_MBUTTONDBLCLK:
     case WM_RBUTTONDOWN:
     case WM_RBUTTONUP:
     case WM_RBUTTONDBLCLK: {
         HWND   msgWindow, ourWindow, rollupWindow;
         PRBool acceptEvent;

         // is the event within our window?
         msgWindow = 0;
         rollupWindow = 0;
         ourWindow = msg->hwnd;
         while (ourWindow) {
           msgWindow = ourWindow;
           ourWindow = ::GetParent(ourWindow);
         }
         ourWindow = (HWND)GetNativeData(NS_NATIVE_WINDOW);
         if (gRollupWidget)
           rollupWindow = (HWND)gRollupWidget->GetNativeData(NS_NATIVE_WINDOW);
         acceptEvent = msgWindow && (msgWindow == ourWindow ||
                                     msgWindow == rollupWindow) ?
                       PR_TRUE : PR_FALSE;

         // if not, accept events for any window that hasn't been
         // disabled.
         if (!acceptEvent) {
           LONG proc = ::GetWindowLong(msgWindow, GWL_WNDPROC);
           if (proc == (LONG)&nsWindow::WindowProc) {
             nsWindow *msgWin = (nsWindow*) ::GetWindowLong(msgWindow, GWL_USERDATA);
             msgWin->IsEnabled(&acceptEvent);
           }
         }
       }
       break;
     default:
       *aForWindow = PR_TRUE;
  }
#else
  *aForWindow = PR_TRUE;
#endif

  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Move this component
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Move(PRInt32 aX, PRInt32 aY)
{
   // Check to see if window needs to be removed first
   // to avoid a costly call to SetWindowPos. This check
   // can not be moved to the calling code in nsView, because 
   // some platforms do not position child windows correctly

  nsRect currentRect;
  GetBounds(currentRect); 
  {
   if ((currentRect.x == aX) && (currentRect.y == aY))
   {
      // Nothing to do, since it is already positioned correctly.
     return NS_OK;    
   }
  }

   // When moving a borderless top-level window the window
   // must be placed relative to its parent. WIN32 wants to
   // place it relative to the screen, so we used the cached parent
   // to calculate the parent's location then add the x,y passed to
   // the move to get the screen coordinate for the borderless top-level
   // window.
  if (mWindowType == eWindowType_popup) {
    HWND parent = mBorderlessParent;
    if (parent) { 
      RECT pr; 
      VERIFY(::GetWindowRect(parent, &pr)); 
      aX += pr.left; 
      aY += pr.top;   
    } 
  } 

  mBounds.x = aX;
  mBounds.y = aY;

    if (mWnd) {
      // make sure this isn't a child window
      if (mIsTopWidgetWindow) {
        // Make sure this window is actually on the screen before we move it
        // XXX: Needs multiple monitor support
        HDC dc = ::GetDC(mWnd);
        if(dc) {
          if (::GetDeviceCaps(dc, TECHNOLOGY) == DT_RASDISPLAY)
          {
            RECT workArea;
            ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
            if(mBounds.x >= workArea.right)
              aX = mBounds.x = workArea.left;

            if(mBounds.y >= workArea.bottom)
              aY = mBounds.y = workArea.top;
          }
        ::ReleaseDC(mWnd, dc);
        }
      }

        nsIWidget *par = GetParent();
        HDWP      deferrer = NULL;

        if (nsnull != par) {
          deferrer = ((nsWindow *)par)->mDeferredPositioner;
        }

        if (NULL != deferrer) {
            VERIFY(((nsWindow *)par)->mDeferredPositioner = ::DeferWindowPos(deferrer,
                                  mWnd, NULL, aX, aY, 0, 0,
                                  SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOSIZE));
        }
        else {
            VERIFY(::SetWindowPos(mWnd, NULL, aX, aY, 0, 0, 
                                  SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOSIZE));
        }

        NS_IF_RELEASE(par);
    }
    return NS_OK;
}

//-------------------------------------------------------------------------
//
// Resize this component
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Resize(PRInt32 aWidth, PRInt32 aHeight, PRBool aRepaint)
{
  NS_ASSERTION((aWidth >=0 ) , "Negative width passed to nsWindow::Resize");
  NS_ASSERTION((aHeight >=0 ), "Negative height passed to nsWindow::Resize");
  // Set cached value for lightweight and printing
  mBounds.width  = aWidth;
  mBounds.height = aHeight;

    if (mWnd) {
        nsIWidget *par = GetParent();
        HDWP      deferrer = NULL;

        if (nsnull != par) {
          deferrer = ((nsWindow *)par)->mDeferredPositioner;
        }

        UINT  flags = SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOMOVE;
        if (!aRepaint) {
          flags |= SWP_NOREDRAW;
        }

        if (NULL != deferrer) {
            VERIFY(((nsWindow *)par)->mDeferredPositioner = ::DeferWindowPos(deferrer,
                                    mWnd, NULL, 0, 0, aWidth, GetHeight(aHeight), flags));
        }
        else {
            VERIFY(::SetWindowPos(mWnd, NULL, 0, 0, aWidth, GetHeight(aHeight), 
                                  flags));
        }

        NS_IF_RELEASE(par);
    }
    
    if (aRepaint)
        Invalidate(PR_FALSE);
    
    return NS_OK;
}

    
//-------------------------------------------------------------------------
//
// Resize this component
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Resize(PRInt32 aX,
                      PRInt32 aY,
                      PRInt32 aWidth,
                      PRInt32 aHeight,
                      PRBool   aRepaint)
{
  NS_ASSERTION((aWidth >=0 ),  "Negative width passed to nsWindow::Resize");
  NS_ASSERTION((aHeight >=0 ), "Negative height passed to nsWindow::Resize");

  // Set cached value for lightweight and printing
  mBounds.x      = aX;
  mBounds.y      = aY;
  mBounds.width  = aWidth;
  mBounds.height = aHeight;

    if (mWnd) {
        nsIWidget *par = GetParent();
        HDWP      deferrer = NULL;

        if (nsnull != par) {
          deferrer = ((nsWindow *)par)->mDeferredPositioner;
        }

        UINT  flags = SWP_NOZORDER | SWP_NOACTIVATE;
        if (!aRepaint) {
          flags |= SWP_NOREDRAW;
        }

        if (NULL != deferrer) {
            VERIFY(((nsWindow *)par)->mDeferredPositioner = ::DeferWindowPos(deferrer,
                                    mWnd, NULL, aX, aY, aWidth, GetHeight(aHeight), 
                                    flags));
        }
        else {
            VERIFY(::SetWindowPos(mWnd, NULL, aX, aY, aWidth, GetHeight(aHeight), 
                                  flags));
        }

        NS_IF_RELEASE(par);
    }

    if (aRepaint)
        Invalidate(PR_FALSE);

    return NS_OK;
}

    
//-------------------------------------------------------------------------
//
// Enable/disable this component
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Enable(PRBool bState)
{
    if (mWnd) {
        ::EnableWindow(mWnd, bState);
    }
    return NS_OK;
}


//-------------------------------------------------------------------------
//
// Give the focus to this component
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::SetFocus(void)
{
    //
    // Switch to the "main gui thread" if necessary... This method must
    // be executed on the "gui thread"...
    //
    nsToolkit* toolkit = (nsToolkit *)mToolkit;
    if (!toolkit->IsGuiThread()) {
        MethodInfo info(this, nsWindow::SET_FOCUS);
        toolkit->CallMethod(&info);
        return NS_ERROR_FAILURE;
    }

    if (mWnd) {
        ::SetFocus(mWnd);
    }
    return NS_OK;
}

    
//-------------------------------------------------------------------------
//
// Get this component dimension
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::GetBounds(nsRect &aRect)
{
  if (mWnd) {
    RECT r;
    VERIFY(::GetWindowRect(mWnd, &r));

    // assign size
    aRect.width  = r.right - r.left;
    aRect.height = r.bottom - r.top;

    // convert coordinates if parent exists
    HWND parent = ::GetParent(mWnd);
    if (parent) {
      RECT pr;
      VERIFY(::GetWindowRect(parent, &pr));
      r.left -= pr.left;
      r.top  -= pr.top;
    }
    aRect.x = r.left;
    aRect.y = r.top;
  } else {
    aRect = mBounds;
  }

  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Get this component dimension
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::GetClientBounds(nsRect &aRect)
{

  if (mWnd) {
    RECT r;
    VERIFY(::GetClientRect(mWnd, &r));

    // assign size
    aRect.x = 0;
    aRect.y = 0;
    aRect.width  = r.right - r.left;
    aRect.height = r.bottom - r.top;

  } else {
    aRect.SetRect(0,0,0,0);
  }
  return NS_OK;
}

//get the bounds, but don't take into account the client size

void nsWindow::GetNonClientBounds(nsRect &aRect)
{
  if (mWnd) {
      RECT r;
      VERIFY(::GetWindowRect(mWnd, &r));

      // assign size
      aRect.width = r.right - r.left;
      aRect.height = r.bottom - r.top;

      // convert coordinates if parent exists
      HWND parent = ::GetParent(mWnd);
      if (parent) {
        RECT pr;
        VERIFY(::GetWindowRect(parent, &pr));
        r.left -= pr.left;
        r.top -= pr.top;
      }
      aRect.x = r.left;
      aRect.y = r.top;
  } else {
      aRect.SetRect(0,0,0,0);
  }
}

           
//-------------------------------------------------------------------------
//
// Set the background color
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::SetBackgroundColor(const nscolor &aColor)
{
    nsBaseWidget::SetBackgroundColor(aColor);
  
    if (mBrush)
      ::DeleteObject(mBrush);

    mBrush = ::CreateSolidBrush(NSRGB_2_COLOREF(mBackground));
    if (mWnd != NULL) {
      SetClassLong(mWnd, GCL_HBRBACKGROUND, (LONG)mBrush);
    }
    return NS_OK;
}

    
//-------------------------------------------------------------------------
//
// Get this component font
//
//-------------------------------------------------------------------------
nsIFontMetrics* nsWindow::GetFont(void)
{
    NS_NOTYETIMPLEMENTED("GetFont not yet implemented"); // to be implemented
    return NULL;
}

    
//-------------------------------------------------------------------------
//
// Set this component font
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::SetFont(const nsFont &aFont)
{
  // Cache Font for owner draw
  if (mFont == nsnull) {
    mFont = new nsFont(aFont);
  } else {
    *mFont  = aFont;
  }
  
  // Bail out if there is no context
  if (nsnull == mContext) {
    return NS_ERROR_FAILURE;
  }

  nsIFontMetrics* metrics;
  mContext->GetMetricsFor(aFont, metrics);
  nsFontHandle  fontHandle;
  metrics->GetFontHandle(fontHandle);
  HFONT hfont = (HFONT)fontHandle;

    // Draw in the new font
  ::SendMessage(mWnd, WM_SETFONT, (WPARAM)hfont, (LPARAM)0); 
  NS_RELEASE(metrics);

  return NS_OK;
}

        
//-------------------------------------------------------------------------
//
// Set this component cursor
//
//-------------------------------------------------------------------------

NS_METHOD nsWindow::SetCursor(nsCursor aCursor)
{
 
  // Only change cursor if it's changing

  //XXX mCursor isn't always right.  Scrollbars and others change it, too.
  //XXX If we want this optimization we need a better way to do it.
  //if (aCursor != mCursor) {
    HCURSOR newCursor = NULL;

    switch(aCursor) {
    case eCursor_select:
      newCursor = ::LoadCursor(NULL, IDC_IBEAM);
      break;
      
    case eCursor_wait:
      newCursor = ::LoadCursor(NULL, IDC_WAIT);
      break;

    case eCursor_hyperlink: {
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_SELECTANCHOR));
      break;
    }

    case eCursor_standard:
      newCursor = ::LoadCursor(NULL, IDC_ARROW);
      break;

    case eCursor_sizeWE:
      newCursor = ::LoadCursor(NULL, IDC_SIZEWE);
      break;

    case eCursor_sizeNS:
      newCursor = ::LoadCursor(NULL, IDC_SIZENS);
      break;

    case eCursor_arrow_north:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWNORTH));
      break;

    case eCursor_arrow_north_plus:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWNORTHPLUS));
      break;

    case eCursor_arrow_south:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWSOUTH));
      break;

    case eCursor_arrow_south_plus:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWSOUTHPLUS));
      break;

    case eCursor_arrow_east:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWEAST));
      break;

    case eCursor_arrow_east_plus:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWEASTPLUS));
      break;

    case eCursor_arrow_west:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWWEST));
      break;

    case eCursor_arrow_west_plus:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWWESTPLUS));
      break;

    default:
      NS_ASSERTION(0, "Invalid cursor type");
      break;
    }

    if (NULL != newCursor) {
      mCursor = aCursor;
      HCURSOR oldCursor = ::SetCursor(newCursor);
    }
  //}
  return NS_OK;
}
    
//-------------------------------------------------------------------------
//
// Invalidate this component visible area
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Invalidate(PRBool aIsSynchronous)
{
    if (mWnd) 
    {
#ifdef NS_DEBUG
      debug_DumpInvalidate(stdout,
                           this,
                           nsnull,
                           aIsSynchronous,
                           "noname",
                           (PRInt32) mWnd);
#endif // NS_DEBUG
      
      VERIFY(::InvalidateRect(mWnd, NULL, TRUE));
      if (aIsSynchronous) {
          VERIFY(::UpdateWindow(mWnd));
      }
    }

    return NS_OK;
}

//-------------------------------------------------------------------------
//
// Invalidate this component visible area
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Invalidate(const nsRect & aRect, PRBool aIsSynchronous)
{
  RECT rect;

  if (mWnd) 
  {
    rect.left   = aRect.x;
    rect.top    = aRect.y;
    rect.right  = aRect.x + aRect.width;
    rect.bottom = aRect.y  + aRect.height;

#ifdef NS_DEBUG
    debug_DumpInvalidate(stdout,
                         this,
                         &aRect,
                         aIsSynchronous,
                         "noname",
                         (PRInt32) mWnd);
#endif // NS_DEBUG

    VERIFY(::InvalidateRect(mWnd, &rect, TRUE));
    if (aIsSynchronous) {
      VERIFY(::UpdateWindow(mWnd));
    }
  }
  return NS_OK;
}

NS_IMETHODIMP 
nsWindow::InvalidateRegion(const nsIRegion *aRegion, PRBool aIsSynchronous)

{
  nsresult rv = NS_OK;
  if (mWnd) {
    HRGN nativeRegion;
    rv = aRegion->GetNativeRegion((void *&)nativeRegion);
    if (nativeRegion) {
      if (NS_SUCCEEDED(rv)) {
        VERIFY(::InvalidateRgn(mWnd, nativeRegion, TRUE));

        if (aIsSynchronous) {
          VERIFY(::UpdateWindow(mWnd));
        }
      }
    } else {
      rv = NS_ERROR_FAILURE;
    }
  }
  return rv;  
}

//-------------------------------------------------------------------------
//
// Force a synchronous repaint of the window
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsWindow::Update()
{
  // updates can come through for windows no longer holding an mWnd during
  // deletes triggered by JavaScript in buttons with mouse feedback
  if (mWnd)
    VERIFY(::UpdateWindow(mWnd));
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Return some native data according to aDataType
//
//-------------------------------------------------------------------------
void* nsWindow::GetNativeData(PRUint32 aDataType)
{
    switch(aDataType) {
        case NS_NATIVE_WIDGET:
        case NS_NATIVE_WINDOW:
        case NS_NATIVE_PLUGIN_PORT:
            return (void*)mWnd;
        case NS_NATIVE_GRAPHIC:
            // XXX:  This is sleezy!!  Remember to Release the DC after using it!
            return (void*)::GetDC(mWnd);
        case NS_NATIVE_COLORMAP:
        default:
            break;
    }

    return NULL;
}

//~~~
void nsWindow::FreeNativeData(void * data, PRUint32 aDataType)
{
  switch(aDataType) 
  {
    case NS_NATIVE_GRAPHIC:
    ::ReleaseDC(mWnd, (HDC)data);
    case NS_NATIVE_WIDGET:
    case NS_NATIVE_WINDOW:
    case NS_NATIVE_PLUGIN_PORT:
    case NS_NATIVE_COLORMAP:
      break;
    default:
      break;
  }
}

//-------------------------------------------------------------------------
//
// Set the colormap of the window
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::SetColorMap(nsColorMap *aColorMap)
{
    if (mPalette != NULL) {
        ::DeleteObject(mPalette);
    }

    PRUint8 *map = aColorMap->Index;
    LPLOGPALETTE pLogPal = (LPLOGPALETTE) new char[2 * sizeof(WORD) +
                                              aColorMap->NumColors * sizeof(PALETTEENTRY)];
	pLogPal->palVersion = 0x300;
	pLogPal->palNumEntries = aColorMap->NumColors;
	for(int i = 0; i < aColorMap->NumColors; i++) 
    {
		pLogPal->palPalEntry[i].peRed = *map++;
		pLogPal->palPalEntry[i].peGreen = *map++;
		pLogPal->palPalEntry[i].peBlue = *map++;
		pLogPal->palPalEntry[i].peFlags = 0;
	}
	mPalette = ::CreatePalette(pLogPal);
	delete pLogPal;

    NS_ASSERTION(mPalette != NULL, "Null palette");
    if (mPalette != NULL) {
        HDC hDC = ::GetDC(mWnd);
        HPALETTE hOldPalette = ::SelectPalette(hDC, mPalette, TRUE);
        ::RealizePalette(hDC);
        ::SelectPalette(hDC, hOldPalette, TRUE);
        ::ReleaseDC(mWnd, hDC);
    }
    return NS_OK;
}


//-------------------------------------------------------------------------
//
// Scroll the bits of a window
//
//-------------------------------------------------------------------------
//XXX Scroll is obsolete and should go away soon
NS_METHOD nsWindow::Scroll(PRInt32 aDx, PRInt32 aDy, nsRect *aClipRect)
{
  RECT  trect;

  if (nsnull != aClipRect)
  {
    trect.left = aClipRect->x;
    trect.top = aClipRect->y;
    trect.right = aClipRect->XMost();
    trect.bottom = aClipRect->YMost();
  }

  ::ScrollWindowEx(mWnd, aDx, aDy, (nsnull != aClipRect) ? &trect : NULL, NULL,
                   NULL, NULL, SW_INVALIDATE | SW_SCROLLCHILDREN);
  ::UpdateWindow(mWnd);
  return NS_OK;
}

NS_IMETHODIMP nsWindow::ScrollWidgets(PRInt32 aDx, PRInt32 aDy)
{
    // Scroll the entire contents of the window + change the offset of any child windows
  ::ScrollWindowEx(mWnd, aDx, aDy, NULL, NULL, NULL, 
     NULL, SW_INVALIDATE | SW_SCROLLCHILDREN);
  ::UpdateWindow(mWnd); // Force synchronous generation of NS_PAINT
  return NS_OK;
}

NS_IMETHODIMP nsWindow::ScrollRect(nsRect &aRect, PRInt32 aDx, PRInt32 aDy)
{
  RECT  trect;

  trect.left = aRect.x;
  trect.top = aRect.y;
  trect.right = aRect.XMost();
  trect.bottom = aRect.YMost();

    // Scroll the bits in the window defined by trect. 
    // Child windows are not scrolled.
  ::ScrollWindowEx(mWnd, aDx, aDy, &trect, NULL, NULL, 
    NULL, SW_INVALIDATE);
  ::UpdateWindow(mWnd); // Force synchronous generation of NS_PAINT
  return NS_OK;
}


//-------------------------------------------------------------------------
//
// Every function that needs a thread switch goes through this function
// by calling SendMessage (..WM_CALLMETHOD..) in nsToolkit::CallMethod.
//
//-------------------------------------------------------------------------
BOOL nsWindow::CallMethod(MethodInfo *info)
{
    BOOL bRet = TRUE;

    switch (info->methodId) {
        case nsWindow::CREATE:
            NS_ASSERTION(info->nArgs == 7, "Wrong number of arguments to CallMethod");
            Create((nsIWidget*)(info->args[0]), 
                        (nsRect&)*(nsRect*)(info->args[1]), 
                        (EVENT_CALLBACK)(info->args[2]), 
                        (nsIDeviceContext*)(info->args[3]),
                        (nsIAppShell *)(info->args[4]),
                        (nsIToolkit*)(info->args[5]),
                        (nsWidgetInitData*)(info->args[6]));
            break;

        case nsWindow::CREATE_NATIVE:
            NS_ASSERTION(info->nArgs == 7, "Wrong number of arguments to CallMethod");
            Create((nsNativeWidget)(info->args[0]), 
                        (nsRect&)*(nsRect*)(info->args[1]), 
                        (EVENT_CALLBACK)(info->args[2]), 
                        (nsIDeviceContext*)(info->args[3]),
                        (nsIAppShell *)(info->args[4]),
                        (nsIToolkit*)(info->args[5]),
                        (nsWidgetInitData*)(info->args[6]));
            return TRUE;

        case nsWindow::DESTROY:
            NS_ASSERTION(info->nArgs == 0, "Wrong number of arguments to CallMethod");
            Destroy();
            break;

        case nsWindow::SET_FOCUS:
            NS_ASSERTION(info->nArgs == 0, "Wrong number of arguments to CallMethod");
            SetFocus();
            break;

        default:
            bRet = FALSE;
            break;
    }

    return bRet;
}

//-------------------------------------------------------------------------
void nsWindow::SetUpForPaint(HDC aHDC) 
{
  ::SetBkColor (aHDC, NSRGB_2_COLOREF(mBackground));
  ::SetTextColor(aHDC, NSRGB_2_COLOREF(mForeground));
  ::SetBkMode (aHDC, TRANSPARENT);
}

//---------------------------------------------------------
NS_METHOD nsWindow::EnableDragDrop(PRBool aEnable)
{
  nsresult rv = NS_ERROR_FAILURE;

  if (aEnable) {
    if (nsnull == mNativeDragTarget) {
       mNativeDragTarget = new nsNativeDragTarget(this);
       if (NULL != mNativeDragTarget) {
         mNativeDragTarget->AddRef();
         if (S_OK == ::CoLockObjectExternal((LPUNKNOWN)mNativeDragTarget,TRUE,FALSE)) {
           if (S_OK == ::RegisterDragDrop(mWnd, (LPDROPTARGET)mNativeDragTarget)) {
             rv = NS_OK;
           }
         }
       }
    }
  } else {
    if (nsnull != mWnd && NULL != mNativeDragTarget) {
      ::RevokeDragDrop(mWnd);
      if (S_OK == ::CoLockObjectExternal((LPUNKNOWN)mNativeDragTarget, FALSE, TRUE)) {
        rv = NS_OK;
      }
      NS_RELEASE(mNativeDragTarget);
    }
  }

  return rv;
}

//-------------------------------------------------------------------------
UINT nsWindow::MapFromNativeToDOM(UINT aNativeKeyCode)
{
  if (aNativeKeyCode == 0xBB) { // equals
    return 0x3D;
  } else if (aNativeKeyCode == 0xBA) { // semicolon
    return 0x3B;
  }

  return aNativeKeyCode;
}

//-------------------------------------------------------------------------
//
// OnKey
//
//-------------------------------------------------------------------------
PRBool nsWindow::DispatchKeyEvent(PRUint32 aEventType, WORD aCharCode, UINT aVirtualCharCode)
{
  nsKeyEvent event;
  nsPoint point;

  point.x = 0;
  point.y = 0;

  InitEvent(event, aEventType, &point); // this add ref's event.widget

  event.charCode = aCharCode;
  event.keyCode  = !mIMEIsComposing?MapFromNativeToDOM(aVirtualCharCode):aVirtualCharCode;

#ifdef KE_DEBUG
  static cnt=0;
  printf("%d DispatchKE Type: %s charCode %d  keyCode %d ", cnt++,  
        (NS_KEY_PRESS == aEventType)?"PRESS":(aEventType == NS_KEY_UP?"Up":"Down"), 
         event.charCode, event.keyCode);
  printf("Shift: %s Control %s Alt: %s \n",  (mIsShiftDown?"D":"U"), (mIsControlDown?"D":"U"), (mIsAltDown?"D":"U"));
  printf("[%c][%c][%c] <==   [%c][%c][%c][ space bar ][%c][%c][%c]\n", 
             IS_VK_DOWN(NS_VK_SHIFT) ? 'S' : ' ',
             IS_VK_DOWN(NS_VK_CONTROL) ? 'C' : ' ',
             IS_VK_DOWN(NS_VK_ALT) ? 'A' : ' ',
             IS_VK_DOWN(VK_LSHIFT) ? 'S' : ' ',
             IS_VK_DOWN(VK_LCONTROL) ? 'C' : ' ',
             IS_VK_DOWN(VK_LMENU) ? 'A' : ' ',
             IS_VK_DOWN(VK_RMENU) ? 'A' : ' ',
             IS_VK_DOWN(VK_RCONTROL) ? 'C' : ' ',
             IS_VK_DOWN(VK_RSHIFT) ? 'S' : ' '

  );
#endif

  event.isShift   = mIsShiftDown;
  event.isControl = mIsControlDown;
  event.isMeta   =  PR_FALSE;
  event.isAlt     = mIsAltDown;
  event.eventStructType = NS_KEY_EVENT;

  PRBool result = DispatchWindowEvent(&event);
  NS_RELEASE(event.widget);

  return result;
}



//-------------------------------------------------------------------------
//
//
//-------------------------------------------------------------------------
#define WM_CHAR_LATER(vk) ( ((vk)<= VK_SPACE) || \
                                 (('0'<=(vk))&&((vk)<='9')) || \
                                 (('A'<=(vk))&&((vk)<='Z')) || \
                                 ((VK_NUMPAD0 <=(vk))&&((vk)<=VK_DIVIDE)) || \
								 ((0xBA <=(vk))&&((vk)<=NS_VK_BACK_QUOTE)) || \
								 ((NS_VK_OPEN_BRACKET <=(vk))&&((vk)<=NS_VK_QUOTE)) \
                            )
#define NO_WM_CHAR_LATER(vk) (! WM_CHAR_LATER(vk))

BOOL nsWindow::OnKeyDown( UINT aVirtualKeyCode, UINT aScanCode)
{
  WORD asciiKey;

  asciiKey = 0;

  //printf("In OnKeyDown ascii %d  virt: %d  scan: %d\n", asciiKey, aVirtualKeyCode, aScanCode);

  BOOL result = DispatchKeyEvent(NS_KEY_DOWN, asciiKey, aVirtualKeyCode);

  // XXX: this is a special case hack, should probably use IsSpecialChar and
  //      do the right thing for all SPECIAL_KEY codes
  // "SPECIAL_KEY" keys don't generate a WM_CHAR, so don't generate an NS_KEY_PRESS
  // this is a special case for the delete key
  if (aVirtualKeyCode==VK_DELETE) 
  {
    DispatchKeyEvent(NS_KEY_PRESS, 0, aVirtualKeyCode);
  } 
  else if (NO_WM_CHAR_LATER(aVirtualKeyCode)) 
  {
    DispatchKeyEvent(NS_KEY_PRESS, 0, aVirtualKeyCode);
  } 
  else if (mIsControlDown && 
           (( NS_VK_0 <= aVirtualKeyCode)&&( aVirtualKeyCode <= NS_VK_9)))
  {
    // put the 0 - 9 in charcode instead of keycode.
    DispatchKeyEvent(NS_KEY_PRESS, aVirtualKeyCode, 0);
  }

  return result;
}

//-------------------------------------------------------------------------
//
//
//-------------------------------------------------------------------------
BOOL nsWindow::OnKeyUp( UINT aVirtualKeyCode, UINT aScanCode)
{
  BOOL result = DispatchKeyEvent(NS_KEY_UP, 0, aVirtualKeyCode);
  return result;
}


//-------------------------------------------------------------------------
//
//
//-------------------------------------------------------------------------
BOOL nsWindow::OnChar( UINT mbcsCharCode, UINT virtualKeyCode, bool isMultiByte )
{
  wchar_t	uniChar;
  char		charToConvert[2];
  size_t	length;

  {
	  charToConvert[0] = LOBYTE(mbcsCharCode);
	  length=1;
  }

  
  if(mIsControlDown && (virtualKeyCode <= 0x1A)) // Ctrl+A Ctrl+Z, see Programming Windows 3.1 page 110 for details  
  { 
    // need to account for shift here.  bug 16486 
    if ( mIsShiftDown ) 
      uniChar = virtualKeyCode - 1 + 'A' ; 
    else 
      uniChar = virtualKeyCode - 1 + 'a' ; 
    virtualKeyCode = 0;
  } 
  else 
  { // 0x20 - SPACE, 0x3D - EQUALS
    if(virtualKeyCode < 0x20 || (virtualKeyCode == 0x3D && mIsControlDown)) 
    {
      uniChar = 0;
    } 
    else 
    {
      ::MultiByteToWideChar(gCurrentKeyboardCP,MB_PRECOMPOSED,charToConvert,length,
	    &uniChar,sizeof(uniChar));
      virtualKeyCode = 0;
      mIsShiftDown = PR_FALSE;
    }
  }
  return DispatchKeyEvent(NS_KEY_PRESS, uniChar, virtualKeyCode);

  //return FALSE;
}



//-------------------------------------------------------------------------
//
// Process all nsWindows messages
//
//-------------------------------------------------------------------------
static PRBool gJustGotDeactivate = PR_FALSE;
static PRBool gJustGotActivate = PR_FALSE;

PRBool nsWindow::ProcessMessage(UINT msg, WPARAM wParam, LPARAM lParam, LRESULT *aRetValue)
{
    static UINT vkKeyCached = 0;                // caches VK code fon WM_KEYDOWN
    static BOOL firstTime = TRUE;                // for mouse wheel logic
    static int  iDeltaPerLine, iAccumDelta ;     // for mouse wheel logic
    ULONG       ulScrollLines ;                  // for mouse wheel logic

    PRBool        result = PR_FALSE; // call the default nsWindow proc
    nsPaletteInfo palInfo;
    *aRetValue = 0;

    switch (msg) {
        case WM_COMMAND: {
          WORD wNotifyCode = HIWORD(wParam); // notification code 
          if ((CBN_SELENDOK == wNotifyCode) || (CBN_SELENDCANCEL == wNotifyCode)) { // Combo box change
            nsGUIEvent event;
            event.eventStructType = NS_GUI_EVENT;
            nsPoint point(0,0);
            InitEvent(event, NS_CONTROL_CHANGE, &point); // this add ref's event.widget
            result = DispatchWindowEvent(&event);
            NS_RELEASE(event.widget);
          } else if (wNotifyCode == 0) { // Menu selection
            nsMenuEvent event;
            event.mCommand = LOWORD(wParam);
            event.eventStructType = NS_MENU_EVENT;
            InitEvent(event, NS_MENU_SELECTED);
            result = DispatchWindowEvent(&event);
            NS_RELEASE(event.widget);
          }
        }
        break;

        case WM_SYSCOMMAND:
          // all we care about right now are the minimize and maximize buttons
          if (wParam == SC_MINIMIZE || wParam == SC_MAXIMIZE || wParam == SC_RESTORE) {
            nsSizeModeEvent event;
            event.eventStructType = NS_SIZEMODE_EVENT;
            event.mSizeMode = nsSizeMode_Normal;
            if (wParam == SC_MINIMIZE)
              event.mSizeMode = nsSizeMode_Minimized;
            if (wParam == SC_MAXIMIZE)
              event.mSizeMode = nsSizeMode_Maximized;
            InitEvent(event, NS_SIZEMODE);

            result = DispatchWindowEvent(&event);
            NS_RELEASE(event.widget);
          }
          break;

        case WM_DISPLAYCHANGE:
          DispatchStandardEvent(NS_DISPLAYCHANGED);
        break;

        case WM_ENTERIDLE:
          {
          nsresult rv;
          NS_WITH_SERVICE(nsITimerQueue, queue, kTimerManagerCID, &rv);
          if (!NS_FAILED(rv)) {

            if (queue->HasReadyTimers(NS_PRIORITY_LOWEST)) {

              MSG wmsg;
              do {
                //printf("fire\n");
                queue->FireNextReadyTimer(NS_PRIORITY_LOWEST);
              } while (queue->HasReadyTimers(NS_PRIORITY_LOWEST) && 
                  !::PeekMessage(&wmsg, NULL, 0, 0, PM_NOREMOVE));
            }
          }
          }
          break;
        
        case WM_NOTIFY:
            // TAB change
          {
            LPNMHDR pnmh = (LPNMHDR) lParam;

            switch (pnmh->code) {
              case TCN_SELCHANGE: {
                DispatchStandardEvent(NS_TABCHANGE);
                result = PR_TRUE;
              }
              break;

            }
          }
          break;

        case WM_MOVE: // Window moved 
          {
            PRInt32 x = (PRInt32)LOWORD(lParam); // horizontal position in screen coordinates 
            PRInt32 y = (PRInt32)HIWORD(lParam); // vertical position in screen coordinates 
            result = OnMove(x, y); 
          }
          break;

        case WM_CLOSE: // close request
          DispatchStandardEvent(NS_XUL_CLOSE);
          result = PR_TRUE; // abort window closure
          break;

        case WM_DESTROY:
            // clean up.
            OnDestroy();
            result = PR_TRUE;
            break;

        case WM_PAINT:
            result = OnPaint();
            break;
	case WM_SYSCHAR:
	case WM_CHAR: 
        {
#ifdef KE_DEBUG
            printf("%s\tchar=%c\twp=%4x\tlp=%8x\n", (msg == WM_SYSCHAR) ? "WM_SYSCHAR" : "WM_CHAR" , wParam, wParam, lParam);
#endif

            mIsShiftDown   = IS_VK_DOWN(NS_VK_SHIFT);
            if(WM_SYSCHAR==msg)
            {
                mIsControlDown = IS_VK_DOWN(NS_VK_CONTROL);
                mIsAltDown     = IS_VK_DOWN(NS_VK_ALT);
            } else { // WM_KEYUP
                // If the Context Code bit is down and we got a WM_KEY
                // it is a key press for character, not accelerator
                // see p246 of Programming Windows 95 [Charles Petzold] for details
                mIsControlDown = (0 == (KF_ALTDOWN & HIWORD(lParam)))&& IS_VK_DOWN(NS_VK_CONTROL);
                mIsAltDown     = (0 == (KF_ALTDOWN & HIWORD(lParam)))&& IS_VK_DOWN(NS_VK_ALT);
            }

            unsigned char    ch = (unsigned char)wParam;
            UINT            char_result;
  
            //
            // check first for backspace or return, handle them specially 
            //
            if (ch==0x0d || ch==0x08) {

                result = OnChar(ch,ch==0x0d ? VK_RETURN : VK_BACK,true);
                break;
            }
  
            {
                char_result = ch;
                result = OnChar(char_result,ch,false);
            }
  
            break;
        }
        case WM_SYSKEYUP:
        case WM_KEYUP: 
#ifdef KE_DEBUG
            printf("%s\t\twp=%x\tlp=%x\n",  
                   (WM_KEYUP==msg)?"WM_KEYUP":"WM_SYSKEYUP" , wParam, lParam);
#endif
            mIsShiftDown   = IS_VK_DOWN(NS_VK_SHIFT);
            if(WM_SYSKEYUP==msg)
            {
                mIsControlDown = IS_VK_DOWN(NS_VK_CONTROL);
                mIsAltDown     = IS_VK_DOWN(NS_VK_ALT);
            } else { // WM_KEYUP
                // If the Context Code bit is down and we got a WM_KEY
                // it is a key press for character, not accelerator
                // see p246 of Programming Windows 95 [Charles Petzold] for details
                mIsControlDown = (0 == (KF_ALTDOWN & HIWORD(lParam)))&& IS_VK_DOWN(NS_VK_CONTROL);
                mIsAltDown     = (0 == (KF_ALTDOWN & HIWORD(lParam)))&& IS_VK_DOWN(NS_VK_ALT);
            }

            // Note- The origional code pass (HIWORD(lParam)) to OnKeyUp as 
            // scan code. Howerver, this break Alt+Num pad input.
            // http://msdn.microsoft.com/library/psdk/winui/keybinpt_8qp5.htm
            // state the following-
            //  Typically, ToAscii performs the translation based on the 
            //  virtual-key code. In some cases, however, bit 15 of the
            //  uScanCode parameter may be used to distinguish between a key 
            //  press and a key release. The scan code is used for
            //  translating ALT+number key combinations.

            if (!mIMEIsComposing)
              result = OnKeyUp(wParam, (HIWORD(lParam) ));
			      else
				      result = PR_FALSE;
            break;

        // Let ths fall through if it isn't a key pad
        case WM_SYSKEYDOWN:
        case WM_KEYDOWN: {
#ifdef KE_DEBUG
            printf("%s\t\twp=%4x\tlp=%8x\n",  
                   (WM_KEYDOWN==msg)?"WM_KEYDOWN":"WM_SYSKEYDOWN" , wParam, lParam);
#endif
            mIsShiftDown   = IS_VK_DOWN(NS_VK_SHIFT);
            if(WM_SYSKEYDOWN==msg)
            {
                mIsControlDown = IS_VK_DOWN(NS_VK_CONTROL);
                mIsAltDown     = IS_VK_DOWN(NS_VK_ALT);
            } else { // WM_KEYUP
                // If the Context Code bit is down and we got a WM_KEY
                // If the Context Code bit is down and we got a WM_KEY
                // it is a key press for character, not accelerator
                // see p246 of Programming Windows 95 [Charles Petzold] for details
                mIsControlDown = (0 == (KF_ALTDOWN & HIWORD(lParam)))&& IS_VK_DOWN(NS_VK_CONTROL);
                mIsAltDown     = (0 == (KF_ALTDOWN & HIWORD(lParam)))&& IS_VK_DOWN(NS_VK_ALT);
            }
            // Note- The origional code pass (HIWORD(lParam)) to OnKeyDown as 
            // scan code. Howerver, this break Alt+Num pad input.
            // http://msdn.microsoft.com/library/psdk/winui/keybinpt_8qp5.htm
            // state the following-
            //  Typically, ToAscii performs the translation based on the 
            //  virtual-key code. In some cases, however, bit 15 of the
            //  uScanCode parameter may be used to distinguish between a key 
            //  press and a key release. The scan code is used for
            //  translating ALT+number key combinations.

            if (!mIMEIsComposing)
               result = OnKeyDown(wParam, (HIWORD(lParam)));
	          else
	             result = PR_FALSE;
            }

            if (wParam == VK_MENU) {
              // This is required to make XP menus work.
              // Do not remove!  Talk to me if you have
              // questions. - hyatt@netscape.com
              result = PR_TRUE;
              *aRetValue = 0;           
            }
            break;

        // say we've dealt with erase background if widget does
        // not need auto-erasing
        case WM_ERASEBKGND: 
            if (! AutoErase()) {
              *aRetValue = 1;
              result = PR_TRUE;
            } 
            break;

        case WM_MOUSEMOVE:
            //RelayMouseEvent(msg,wParam, lParam); 
            result = DispatchMouseEvent(NS_MOUSE_MOVE);
            break;

        case WM_LBUTTONDOWN:
            //SetFocus(); // this is bad
            //RelayMouseEvent(msg,wParam, lParam); 
            {
            result = DispatchMouseEvent(NS_MOUSE_LEFT_BUTTON_DOWN);
            } break;

        case WM_LBUTTONUP:
            //RelayMouseEvent(msg,wParam, lParam); 
            result = DispatchMouseEvent(NS_MOUSE_LEFT_BUTTON_UP);
            break;

        case WM_LBUTTONDBLCLK:
            result = DispatchMouseEvent(NS_MOUSE_LEFT_DOUBLECLICK);
            break;

        case WM_MBUTTONDOWN:
            { 
            result = DispatchMouseEvent(NS_MOUSE_MIDDLE_BUTTON_DOWN);
            } break;

        case WM_MBUTTONUP:
            result = DispatchMouseEvent(NS_MOUSE_MIDDLE_BUTTON_UP);
            break;

        case WM_MBUTTONDBLCLK:
            result = DispatchMouseEvent(NS_MOUSE_MIDDLE_BUTTON_DOWN);           
            break;

        case WM_RBUTTONDOWN:
            {
            result = DispatchMouseEvent(NS_MOUSE_RIGHT_BUTTON_DOWN);            
            } break;

        case WM_RBUTTONUP:
            result = DispatchMouseEvent(NS_MOUSE_RIGHT_BUTTON_UP);
            break;

        case WM_RBUTTONDBLCLK:
            result = DispatchMouseEvent(NS_MOUSE_RIGHT_DOUBLECLICK);                      
            break;

        case WM_HSCROLL:
        case WM_VSCROLL: 
	          // check for the incoming nsWindow handle to be null in which case
	          // we assume the message is coming from a horizontal scrollbar inside
	          // a listbox and we don't bother processing it (well, we don't have to)
	          if (lParam) {
                nsWindow* scrollbar = (nsWindow*)::GetWindowLong((HWND)lParam, GWL_USERDATA);

		            if (scrollbar) {
		                result = scrollbar->OnScroll(LOWORD(wParam), (short)HIWORD(wParam));
		            }
	          }
            break;

        case WM_CTLCOLORLISTBOX:
        case WM_CTLCOLOREDIT:
        case WM_CTLCOLORBTN:
        //case WM_CTLCOLORSCROLLBAR: //XXX causes a the scrollbar to be drawn incorrectly
        case WM_CTLCOLORSTATIC:
	          if (lParam) {
              nsWindow* control = (nsWindow*)::GetWindowLong((HWND)lParam, GWL_USERDATA);
		          if (control) {
                control->SetUpForPaint((HDC)wParam);
		            *aRetValue = (LPARAM)control->OnControlColor();
              }
	          }
    
            result = PR_TRUE;
            break;

		case WM_ACTIVATE:
			if (mEventCallback) {
			  PRInt32 fActive = LOWORD(wParam);
			
			  if(WA_INACTIVE == fActive) {
          gJustGotDeactivate = PR_TRUE;
			  } else {
				  gJustGotActivate = PR_TRUE;
			    nsMouseEvent event;
			    event.eventStructType = NS_GUI_EVENT;
			    InitEvent(event, NS_MOUSE_ACTIVATE);

          event.acceptActivation = PR_TRUE;

          PRBool result = DispatchWindowEvent(&event);
          NS_RELEASE(event.widget);
				  
				  if(event.acceptActivation)
					  *aRetValue = MA_ACTIVATE;
				  else
					  *aRetValue = MA_NOACTIVATE; 
			  }				
			}
			break;

      case WM_SETFOCUS:
        result = DispatchFocus(NS_GOTFOCUS);
		    if(gJustGotActivate) {
          gJustGotActivate = PR_FALSE;
          result = DispatchFocus(NS_ACTIVATE);
			  }
        break;

      case WM_KILLFOCUS:
        result = DispatchFocus(NS_LOSTFOCUS);
			  if(gJustGotDeactivate) {
          gJustGotDeactivate = PR_FALSE;
			    result = DispatchFocus(NS_DEACTIVATE);
			  } 
        break;

      case WM_WINDOWPOSCHANGED: 
        {
            WINDOWPOS *wp = (LPWINDOWPOS)lParam;

            // We only care about a resize, so filter out things like z-order
            // changes. Note: there's a WM_MOVE handler above which is why we're
            // not handling them here...
            if (0 == (wp->flags & SWP_NOSIZE)) {
              // XXX Why are we using the client size area? If the size notification
              // is for the client area then the origin should be (0,0) and not
              // the window origin in screen coordinates...
              RECT r;
              ::GetWindowRect(mWnd, &r);
              PRInt32 newWidth, newHeight;
              newWidth = PRInt32(r.right - r.left);
              newHeight = PRInt32(r.bottom - r.top);
              nsRect rect(wp->x, wp->y, newWidth, newHeight);
              //if (newWidth != mBounds.width)
              {
                RECT drect;

                //getting wider

                drect.left = wp->x + mBounds.width;
                drect.top = wp->y;
                drect.right = drect.left + (newWidth - mBounds.width);
                drect.bottom = drect.top + newHeight;

//                ::InvalidateRect(mWnd, NULL, FALSE);
//                ::InvalidateRect(mWnd, &drect, FALSE);
                ::RedrawWindow(mWnd, &drect, NULL,
                               RDW_INVALIDATE | RDW_NOERASE | RDW_NOINTERNALPAINT | RDW_ERASENOW | RDW_ALLCHILDREN);
              }
              //if (newHeight != mBounds.height)
              {
                RECT drect;

                //getting taller

                drect.left = wp->x;
                drect.top = wp->y + mBounds.height;
                drect.right = drect.left + newWidth;
                drect.bottom = drect.top + (newHeight - mBounds.height);

//                ::InvalidateRect(mWnd, NULL, FALSE);
//                ::InvalidateRect(mWnd, &drect, FALSE);
                ::RedrawWindow(mWnd, &drect, NULL,
                               RDW_INVALIDATE | RDW_NOERASE | RDW_NOINTERNALPAINT | RDW_ERASENOW | RDW_ALLCHILDREN);
              }
              mBounds.width  = newWidth;
              mBounds.height = newHeight;
              ///nsRect rect(wp->x, wp->y, wp->cx, wp->cy);

              // recalculate the width and height
              // this time based on the client area
              if (::GetClientRect(mWnd, &r)) {
                rect.width  = PRInt32(r.right - r.left);
                rect.height = PRInt32(r.bottom - r.top);
              }
              result = OnResize(rect);
            }
            break;
        }

        case WM_SETTINGCHANGE:
          firstTime = TRUE;
        break;

        case WM_PALETTECHANGED:
            if ((HWND)wParam == mWnd) {
                // We caused the WM_PALETTECHANGED message so avoid realizing
                // another foreground palette
                result = PR_TRUE;
                break;
            }
            // fall thru...

        case WM_QUERYNEWPALETTE:      // this window is about to become active
            mContext->GetPaletteInfo(palInfo);
            if (palInfo.isPaletteDevice && palInfo.palette) {
                HDC hDC = ::GetDC(mWnd);
                HPALETTE hOldPal = ::SelectPalette(hDC, (HPALETTE)palInfo.palette, FALSE);
                
                // Realize the drawing palette
                int i = ::RealizePalette(hDC);

                //printf("number of colors that changed=%d\n",i);

                // we should always invalidate.. because the lookup may have changed
                ::InvalidateRect(mWnd, (LPRECT)NULL, TRUE);

                ::ReleaseDC(mWnd, hDC);
                *aRetValue = TRUE;
            }
            result = PR_TRUE;
            break;

				case WM_INPUTLANGCHANGEREQUEST:
					*aRetValue = TRUE;
					result = PR_FALSE;
					break;

				case WM_INPUTLANGCHANGE: 
					result = OnInputLangChange((HKL)lParam, 
								aRetValue);
					break;

				case WM_IME_STARTCOMPOSITION: 
					result = OnIMEStartComposition();
					break;

				case WM_IME_COMPOSITION: 
					result = OnIMEComposition(lParam);
					break;

				case WM_IME_ENDCOMPOSITION: 
					result = OnIMEEndComposition();
					break;

				case WM_IME_CHAR: 
					result = OnIMEChar((BYTE)(wParam>>8), 
						(BYTE) (wParam & 0x00FF), 
						lParam);
					break;

				case WM_IME_NOTIFY: 
					result = OnIMENotify(wParam, lParam, aRetValue);
					break;

#if 0
				// This is a Window 98/2000 only message
				case WM_IME_REQUEST: 
					result = OnIMERequest(wParam, lParam, aRetValue);
					break;
#endif

				case WM_IME_SELECT: 
					result = OnIMESelect(wParam, (WORD)(lParam & 0x0FFFF));
					break;

				case WM_IME_SETCONTEXT: 
					result = OnIMESetContext(wParam, lParam);
					break;

        case WM_DROPFILES: {
          /*HDROP hDropInfo = (HDROP) wParam;
	        UINT nFiles = ::DragQueryFile(hDropInfo, (UINT)-1, NULL, 0);

	        for (UINT iFile = 0; iFile < nFiles; iFile++) {
		        TCHAR szFileName[_MAX_PATH];
		        ::DragQueryFile(hDropInfo, iFile, szFileName, _MAX_PATH);
            printf("szFileName [%s]\n", szFileName);
            nsAutoString fileStr(szFileName);
            nsEventStatus status;
            nsDragDropEvent event;
            InitEvent(event, NS_DRAGDROP_EVENT);
            event.mType      = nsDragDropEventStatus_eDrop;
            event.mIsFileURL = PR_FALSE;
            event.mURL       = (PRUnichar *)fileStr.GetUnicode();
            DispatchEvent(&event, status);
	        }*/
        } break;

      case WM_DESTROYCLIPBOARD: {
        nsIClipboard* clipboard;
        nsresult rv = nsServiceManager::GetService(kCClipboardCID,
                                                   NS_GET_IID(nsIClipboard),
                                                   (nsISupports **)&clipboard);
        clipboard->EmptyClipboard();
        nsServiceManager::ReleaseService(kCClipboardCID, clipboard);
      } break;

      default: {
        // Handle both flavors of mouse wheel events.
        if ( msg == WM_MOUSEWHEEL || msg == uMSH_MOUSEWHEEL ) {
            // Get mouse wheel metrics (but only once).
            if (firstTime) {
                firstTime = FALSE;
                SystemParametersInfo (104, 0, &ulScrollLines, 0) ;
    
                // ulScrollLines usually equals 3 or 0 (for no scrolling)
                // WHEEL_DELTA equals 120, so iDeltaPerLine will be 40
    
                if (ulScrollLines)
                    iDeltaPerLine = WHEEL_DELTA / ulScrollLines ;
                else
                    iDeltaPerLine = 0 ;
            }
            if (iDeltaPerLine == 0)
                return 0;
    
            // The mousewheel event will be dispatched to the toplevel
            // window.  We need to give it to the child window
    
            POINT point;
            point.x = (short) LOWORD(lParam);
            point.y = (short) HIWORD(lParam);
            HWND destWnd = ::WindowFromPoint(point);
            
            if (destWnd != mWnd) {
                nsWindow* destWindow = (nsWindow*) ::GetWindowLong(destWnd, GWL_USERDATA);
                if (destWindow)
                    return destWindow->ProcessMessage(msg, wParam, lParam, aRetValue);
                #ifdef DEBUG
                else
                    printf("WARNING: couldn't get child window for MW event\n");
                #endif
            }
            
            nsMouseScrollEvent scrollEvent;
            if (msg == WM_MOUSEWHEEL)
                scrollEvent.deltaLines = -((short) HIWORD (wParam) / iDeltaPerLine);
            else
                scrollEvent.deltaLines = -((int) wParam / iDeltaPerLine);
            scrollEvent.eventStructType = NS_MOUSE_SCROLL_EVENT;
            scrollEvent.isShift   = IS_VK_DOWN(NS_VK_SHIFT);
            scrollEvent.isControl = IS_VK_DOWN(NS_VK_CONTROL);
            scrollEvent.isMeta    = PR_FALSE;
            scrollEvent.isAlt     = IS_VK_DOWN(NS_VK_ALT);
            InitEvent(scrollEvent, NS_MOUSE_SCROLL);
            if (nsnull != mEventCallback)
                result = DispatchWindowEvent(&scrollEvent);
            NS_RELEASE(scrollEvent.widget);
        } // WM_MOUSEWHEEL || uMSH_MOUSEWHEEL
      } break;
    }

    //*aRetValue = result;
    if (mWnd) {
      return result;
    }
    else {
      //Events which caused mWnd destruction and aren't consumed
      //will crash during the Windows default processing.
      return PR_TRUE;
    }
}



//-------------------------------------------------------------------------
//
// return the window class name and initialize the class if needed
//
//-------------------------------------------------------------------------
LPCTSTR nsWindow::WindowClass()
{
    const LPCTSTR className = "NetscapeWindowClass";

    if (!nsWindow::sIsRegistered) {
        WNDCLASS wc;

//        wc.style            = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
        wc.style            = CS_DBLCLKS;
#ifdef MOZ_AIMM
        wc.lpfnWndProc      = nsWindow::DefaultWindowProc;
#else
        wc.lpfnWndProc      = ::DefWindowProc;
#endif
        wc.cbClsExtra       = 0;
        wc.cbWndExtra       = 0;
        wc.hInstance        = nsToolkit::mDllInstance;
        wc.hIcon            = ::LoadIcon(::GetModuleHandle(NULL), IDI_APPLICATION);
        wc.hCursor          = NULL;
        wc.hbrBackground    = mBrush;
        wc.lpszMenuName     = NULL;
        wc.lpszClassName    = className;
    
        nsWindow::sIsRegistered = ::RegisterClass(&wc);
#ifdef MOZ_AIMM
        // Call FilterClientWindows method since it enables ActiveIME on CJK Windows
        if(nsToolkit::gAIMMApp)
          nsToolkit::gAIMMApp->FilterClientWindows((ATOM*)&nsWindow::sIsRegistered,1);
#endif // MOZ_AIMM
    }

    return className;
}


//-------------------------------------------------------------------------
//
// return nsWindow styles
//
//-------------------------------------------------------------------------
DWORD nsWindow::WindowStyle()
{
  DWORD style;
   
  switch(mWindowType) {

    case eWindowType_child:
      style = WS_OVERLAPPED;
      break;

    case eWindowType_dialog:
      if (mBorderStyle == eBorderStyle_default) {
        style = WS_OVERLAPPED | WS_BORDER | WS_DLGFRAME | WS_SYSMENU |
                DS_3DLOOK | DS_MODALFRAME;
      } else {
        style = WS_OVERLAPPED | WS_BORDER | WS_DLGFRAME | WS_SYSMENU |
                DS_3DLOOK | DS_MODALFRAME |
                WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
      }
      break;

    case eWindowType_popup:
      style = WS_OVERLAPPED | WS_POPUP;
      break;

    default:
      NS_ASSERTION(0, "unknown border style");
      // fall through

    case eWindowType_toplevel:
      style = WS_OVERLAPPED | WS_BORDER | WS_DLGFRAME | WS_SYSMENU |
              WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
      break;
  }

  if (mBorderStyle != eBorderStyle_default && mBorderStyle != eBorderStyle_all) {
    if (mBorderStyle == eBorderStyle_none || !(mBorderStyle & eBorderStyle_border))
      style &= ~WS_BORDER;
    
    if (mBorderStyle == eBorderStyle_none || !(mBorderStyle & eBorderStyle_title)) {
      style &= ~WS_DLGFRAME;
      style |= WS_POPUP;
    }

    if (mBorderStyle == eBorderStyle_none || !(mBorderStyle & eBorderStyle_close))
      style &= ~0;
    // XXX The close box can only be removed by changing the window class,
    // as far as I know   --- roc+moz@cs.cmu.edu

    if (mBorderStyle == eBorderStyle_none ||
      !(mBorderStyle & (eBorderStyle_menu | eBorderStyle_close)))
      style &= ~WS_SYSMENU;
    // Looks like getting rid of the system menu also does away with the
    // close box. So, we only get rid of the system menu if you want neither it
    // nor the close box. How does the Windows "Dialog" window class get just
    // closebox and no sysmenu? Who knows.
    
    if (mBorderStyle == eBorderStyle_none || !(mBorderStyle & eBorderStyle_resizeh))
      style &= ~WS_THICKFRAME;
    
    if (mBorderStyle == eBorderStyle_none || !(mBorderStyle & eBorderStyle_minimize))
      style &= ~WS_MINIMIZEBOX;
    
    if (mBorderStyle == eBorderStyle_none || !(mBorderStyle & eBorderStyle_maximize))
      style &= ~WS_MAXIMIZEBOX;
  }

  return style;
}


//-------------------------------------------------------------------------
//
// return nsWindow extended styles
//
//-------------------------------------------------------------------------
DWORD nsWindow::WindowExStyle()
{
  switch(mWindowType)
  {
    case eWindowType_child:
      return 0;

    case eWindowType_dialog:
      return WS_EX_WINDOWEDGE;

    case eWindowType_popup:
      return WS_EX_TOPMOST | WS_EX_TOOLWINDOW;

    default:
      NS_ASSERTION(0, "unknown border style");
      // fall through

    case eWindowType_toplevel:
      return WS_EX_WINDOWEDGE;
  }
}


// -----------------------------------------------------------------------
//
// Subclass (or remove the subclass from) this component's nsWindow
//
// -----------------------------------------------------------------------
void nsWindow::SubclassWindow(BOOL bState)
{
  if (NULL != mWnd) {
    NS_PRECONDITION(::IsWindow(mWnd), "Invalid window handle");
    
    if (bState) {
        // change the nsWindow proc
        mPrevWndProc = (WNDPROC)::SetWindowLong(mWnd, GWL_WNDPROC, 
                                                 (LONG)nsWindow::WindowProc);
        NS_ASSERTION(mPrevWndProc, "Null standard window procedure");
        // connect the this pointer to the nsWindow handle
        ::SetWindowLong(mWnd, GWL_USERDATA, (LONG)this);
    } 
    else {
        ::SetWindowLong(mWnd, GWL_WNDPROC, (LONG)mPrevWndProc);
        ::SetWindowLong(mWnd, GWL_USERDATA, (LONG)NULL);
        mPrevWndProc = NULL;
    }
  }
}


//-------------------------------------------------------------------------
//
// WM_DESTROY has been called
//
//-------------------------------------------------------------------------
void nsWindow::OnDestroy()
{
    mOnDestroyCalled = PR_TRUE;

    SubclassWindow(FALSE);
    mWnd = NULL;

    // free GDI objects
    if (mBrush) {
      VERIFY(::DeleteObject(mBrush));
      mBrush = NULL;
    }
    if (mPalette) {
      VERIFY(::DeleteObject(mPalette));
      mPalette = NULL;
    }

    // if we were in the middle of deferred window positioning then
    // free the memory for the multiple-window position structure
    if (mDeferredPositioner) {
      VERIFY(::EndDeferWindowPos(mDeferredPositioner));
      mDeferredPositioner = NULL;
    }

    // release references to children, device context, toolkit, and app shell
    nsBaseWidget::OnDestroy();
 
    // dispatch the event
    if (!mIsDestroying) {
      // dispatching of the event may cause the reference count to drop to 0
      // and result in this object being destroyed. To avoid that, add a reference
      // and then release it after dispatching the event
      AddRef();
      DispatchStandardEvent(NS_DESTROY);
      Release();
    }
}

//-------------------------------------------------------------------------
//
// Move
//
//-------------------------------------------------------------------------
PRBool nsWindow::OnMove(PRInt32 aX, PRInt32 aY)
{            
  nsGUIEvent event;
  InitEvent(event, NS_MOVE);
  event.point.x = aX;
  event.point.y = aY;
  event.eventStructType = NS_GUI_EVENT;

  PRBool result = DispatchWindowEvent(&event);
  NS_RELEASE(event.widget);
  return result;
}

//-------------------------------------------------------------------------
//
// Paint
//
//-------------------------------------------------------------------------
PRBool nsWindow::OnPaint()
{
    nsRect    bounds;
    PRBool result = PR_TRUE;
    PAINTSTRUCT ps;
    nsEventStatus eventStatus = nsEventStatus_eIgnore;

#ifdef NS_DEBUG
    HRGN debugPaintFlashRegion = NULL;
    HDC debugPaintFlashDC = NULL;

    if (debug_WantPaintFlashing())
    {
      debugPaintFlashRegion = ::CreateRectRgn(0, 0, 0, 0);
      ::GetUpdateRgn(mWnd, debugPaintFlashRegion, TRUE);
      debugPaintFlashDC = ::GetDC(mWnd);
    }
#endif // NS_DEBUG

    HDC hDC = ::BeginPaint(mWnd, &ps);

    // XXX What is this check doing? If it's trying to check for an empty
    // paint rect then use the IsRectEmpty() function...
    if (ps.rcPaint.left || ps.rcPaint.right || ps.rcPaint.top || ps.rcPaint.bottom) {
        // call the event callback 
        if (mEventCallback) 
        {

            nsPaintEvent event;

            InitEvent(event, NS_PAINT);

            nsRect rect(ps.rcPaint.left, 
                        ps.rcPaint.top, 
                        ps.rcPaint.right - ps.rcPaint.left, 
                        ps.rcPaint.bottom - ps.rcPaint.top);
            event.rect = &rect;
            event.eventStructType = NS_PAINT_EVENT;

#ifdef NS_DEBUG
          debug_DumpPaintEvent(stdout,
                               this,
                               &event,
                               "noname",
                               (PRInt32) mWnd);
#endif // NS_DEBUG

            if (NS_OK == nsComponentManager::CreateInstance(kRenderingContextCID, 
                                                            nsnull, 
                                                            NS_GET_IID(nsIRenderingContext), 
                                                            (void **)&event.renderingContext))
            {
              nsIRenderingContextWin *winrc;

              if (NS_OK == event.renderingContext->QueryInterface(NS_GET_IID(nsIRenderingContextWin), (void **)&winrc))
              {
                nsDrawingSurface surf;

                //i know all of this seems a little backwards. i'll fix it, i swear. MMP

                if (NS_OK == winrc->CreateDrawingSurface(hDC, surf))
                {
                  event.renderingContext->Init(mContext, surf);
                  result = DispatchWindowEvent(&event, eventStatus);
                  event.renderingContext->DestroyDrawingSurface(surf);
                }

                NS_RELEASE(winrc);
              }

              NS_RELEASE(event.renderingContext);
            }
            else
              result = PR_FALSE;

            NS_RELEASE(event.widget);
        }
    }

    ::EndPaint(mWnd, &ps);

#ifdef NS_DEBUG
    if (debug_WantPaintFlashing())
    {
         // Only flash paint events which have not ignored the paint message.
        // Those that ignore the paint message aren't painting anything so there
        // is only the overhead of the dispatching the paint event.
      if (nsEventStatus_eIgnore != eventStatus) {
        ::InvertRgn(debugPaintFlashDC, debugPaintFlashRegion);
        int x;
        for (x = 0; x < 1000000; x++);
        ::InvertRgn(debugPaintFlashDC, debugPaintFlashRegion);
        for (x = 0; x < 1000000; x++);
      }
      ::ReleaseDC(mWnd, debugPaintFlashDC);
      ::DeleteObject(debugPaintFlashRegion);
    }
#endif // NS_DEBUG

    return result;
}


//-------------------------------------------------------------------------
//
// Send a resize message to the listener
//
//-------------------------------------------------------------------------
PRBool nsWindow::OnResize(nsRect &aWindowRect)
{
  // call the event callback 
  if (mEventCallback) {
    nsSizeEvent event;
    InitEvent(event, NS_SIZE);
    event.windowSize = &aWindowRect;
    event.eventStructType = NS_SIZE_EVENT;
    RECT r;
    if (::GetWindowRect(mWnd, &r)) {
      event.mWinWidth  = PRInt32(r.right - r.left);
      event.mWinHeight = PRInt32(r.bottom - r.top);
    } else {
      event.mWinWidth  = 0;
      event.mWinHeight = 0;
    }
    PRBool result = DispatchWindowEvent(&event);
    NS_RELEASE(event.widget);
    return result;
  }

  return PR_FALSE;
}



//-------------------------------------------------------------------------
//
// Deal with all sort of mouse event
//
//-------------------------------------------------------------------------
PRBool nsWindow::DispatchMouseEvent(PRUint32 aEventType, nsPoint* aPoint)
{
  PRBool result = PR_FALSE;

  if (nsnull == mEventCallback && nsnull == mMouseListener) {
    return result;
  }

  nsMouseEvent event;
  InitEvent(event, aEventType, aPoint);

  event.isShift   = IS_VK_DOWN(NS_VK_SHIFT);
  event.isControl = IS_VK_DOWN(NS_VK_CONTROL);
  event.isMeta    = PR_FALSE;
  event.isAlt     = IS_VK_DOWN(NS_VK_ALT);
  event.eventStructType = NS_MOUSE_EVENT;

  //Dblclicks are used to set the click count, then changed to mousedowns
  if (aEventType == NS_MOUSE_LEFT_DOUBLECLICK ||
      aEventType == NS_MOUSE_RIGHT_DOUBLECLICK) {
    event.message = (aEventType == NS_MOUSE_LEFT_DOUBLECLICK) ? 
                     NS_MOUSE_LEFT_BUTTON_DOWN : NS_MOUSE_RIGHT_BUTTON_DOWN;
    event.clickCount = 2;
  }
  else {
    event.clickCount = 1;
  }

  nsPluginEvent pluginEvent;

  switch (aEventType)//~~~
  {
    case NS_MOUSE_LEFT_BUTTON_DOWN:
      pluginEvent.event = WM_LBUTTONDOWN;
      break;
    case NS_MOUSE_LEFT_BUTTON_UP:
      pluginEvent.event = WM_LBUTTONUP;
      break;
    case NS_MOUSE_LEFT_DOUBLECLICK:
      pluginEvent.event = WM_LBUTTONDBLCLK;
      break;
    case NS_MOUSE_RIGHT_BUTTON_DOWN:
      pluginEvent.event = WM_RBUTTONDOWN;
      break;
    case NS_MOUSE_RIGHT_BUTTON_UP:
      pluginEvent.event = WM_RBUTTONUP;
      break;
    case NS_MOUSE_RIGHT_DOUBLECLICK:
      pluginEvent.event = WM_RBUTTONDBLCLK;
      break;
    case NS_MOUSE_MIDDLE_BUTTON_DOWN:
      pluginEvent.event = WM_MBUTTONDOWN;
      break;
    case NS_MOUSE_MIDDLE_BUTTON_UP:
      pluginEvent.event = WM_MBUTTONUP;
      break;
    case NS_MOUSE_MIDDLE_DOUBLECLICK:
      pluginEvent.event = WM_MBUTTONDBLCLK;
      break;
    case NS_MOUSE_MOVE:
      pluginEvent.event = WM_MOUSEMOVE;
      break;
    default:
      break;
  }

  pluginEvent.wParam = 0;
  pluginEvent.wParam |= (event.isShift) ? MK_SHIFT : 0;
  pluginEvent.wParam |= (event.isControl) ? MK_CONTROL : 0;
  pluginEvent.lParam = MAKELONG(event.point.x, event.point.y);

  event.nativeMsg = (void *)&pluginEvent;

  // call the event callback 
  if (nsnull != mEventCallback) {

    result = DispatchWindowEvent(&event);

    if (aEventType == NS_MOUSE_MOVE) {

      // if we are not in mouse cpature mode (mouse down and hold)
      // then use "this" window
      // if we are in mouse capture, then all events are being directed
      // back to the nsWindow doing the capture. So therefore, the detection
      // of whether we are in a new nsWindow is wrong. Meaning this MOUSE_MOVE
      // event hold the captured windows pointer not the one the mouse is over.
      //
      // So we use "WindowFromPoint" to find what window we are over and 
      // set that window into the mouse trailer timer.
      if (!mIsInMouseCapture) {
        MouseTrailer * mouseTrailer = MouseTrailer::GetMouseTrailer(0);
        MouseTrailer::SetMouseTrailerWindow(this);
        mouseTrailer->CreateTimer();
      } else {
        POINT mp;
        DWORD pos = ::GetMessagePos();
        mp.x      = LOWORD(pos);
        mp.y      = HIWORD(pos);

        // OK, now find out if we are still inside
        // the captured native window
        POINT cpos;
        cpos.x = LOWORD(pos);
        cpos.y = HIWORD(pos);

        nsWindow * someWindow = NULL;
        HWND hWnd = ::WindowFromPoint(mp);
        if (hWnd != NULL) {
          ::ScreenToClient(hWnd, &cpos);
          RECT r;
          VERIFY(::GetWindowRect(hWnd, &r));
          if (cpos.x >= r.left && cpos.x <= r.right &&
              cpos.y >= r.top && cpos.y <= r.bottom) {
            // yes we are so we should be able to get a valid window
            // although, strangley enough when we are on the frame part of the
            // window we get right here when in capture mode
            // but this window won't match the capture mode window so
            // we are ok
            someWindow = (nsWindow*)::GetWindowLong(hWnd, GWL_USERDATA);
          } 
        }
        // only set the window into the mouse trailer if we have a good window
        if (nsnull != someWindow)  {
          MouseTrailer * mouseTrailer = MouseTrailer::GetMouseTrailer(0);
          MouseTrailer::SetMouseTrailerWindow(someWindow);
          mouseTrailer->CreateTimer();
        }
      }

      nsRect rect;
      GetBounds(rect);
      rect.x = 0;
      rect.y = 0;

      if (rect.Contains(event.point.x, event.point.y)) {
        if (gCurrentWindow == NULL || gCurrentWindow != this) {
          if ((nsnull != gCurrentWindow) && (!gCurrentWindow->mIsDestroying)) {
            MouseTrailer::IgnoreNextCycle();
            gCurrentWindow->DispatchMouseEvent(NS_MOUSE_EXIT, gCurrentWindow->GetLastPoint());
          }
          gCurrentWindow = this;
          if (!mIsDestroying) {
            gCurrentWindow->DispatchMouseEvent(NS_MOUSE_ENTER);
          }
        }
      } 
    } else if (aEventType == NS_MOUSE_EXIT) {
      if (gCurrentWindow == this) {
        gCurrentWindow = nsnull;
      }
    }
    NS_RELEASE(event.widget);
    return result;
  }

  if (nsnull != mMouseListener) {
    switch (aEventType) {
      case NS_MOUSE_MOVE: {
        result = ConvertStatus(mMouseListener->MouseMoved(event));
        nsRect rect;
        GetBounds(rect);
        if (rect.Contains(event.point.x, event.point.y)) {
          if (gCurrentWindow == NULL || gCurrentWindow != this) {
            gCurrentWindow = this;
          }
        } else {
          //printf("Mouse exit");
        }

      } break;

      case NS_MOUSE_LEFT_BUTTON_DOWN:
      case NS_MOUSE_MIDDLE_BUTTON_DOWN:
      case NS_MOUSE_RIGHT_BUTTON_DOWN:
        result = ConvertStatus(mMouseListener->MousePressed(event));
        break;

      case NS_MOUSE_LEFT_BUTTON_UP:
      case NS_MOUSE_MIDDLE_BUTTON_UP:
      case NS_MOUSE_RIGHT_BUTTON_UP:
        result = ConvertStatus(mMouseListener->MouseReleased(event));
        result = ConvertStatus(mMouseListener->MouseClicked(event));
        break;
    } // switch
  } 
  NS_RELEASE(event.widget);
  return result;
}

//-------------------------------------------------------------------------
//
// Deal with focus messages
//
//-------------------------------------------------------------------------
PRBool nsWindow::DispatchFocus(PRUint32 aEventType)
{
  // call the event callback 
  if (mEventCallback) {
    nsGUIEvent event;
    event.eventStructType = NS_GUI_EVENT;
    InitEvent(event, aEventType);

    //focus and blur event should go to their base widget loc, not current mouse pos
    event.point.x = 0;
    event.point.y = 0;

    nsPluginEvent pluginEvent;

    switch (aEventType)//~~~
    {
      case NS_GOTFOCUS:
        pluginEvent.event = WM_SETFOCUS;
        break;
      case NS_LOSTFOCUS:
        pluginEvent.event = WM_KILLFOCUS;
        break;
      default:
        break;
    }

    event.nativeMsg = (void *)&pluginEvent;

    PRBool result = DispatchWindowEvent(&event);
    NS_RELEASE(event.widget);
    return result;
  }
  return PR_FALSE;
}


//-------------------------------------------------------------------------
//
// Deal with scrollbar messages (actually implemented only in nsScrollbar)
//
//-------------------------------------------------------------------------
PRBool nsWindow::OnScroll(UINT scrollCode, int cPos)
{
    return PR_FALSE;
}


//-------------------------------------------------------------------------
//
// Return the brush used to paint the background of this control 
//
//-------------------------------------------------------------------------
HBRUSH nsWindow::OnControlColor()
{
    return mBrush;
}

//-------------------------------------------------------------------------
//
// Deal with all sort of mouse event
//
//-------------------------------------------------------------------------
PRBool ChildWindow::DispatchMouseEvent(PRUint32 aEventType, nsPoint* aPoint)
{
  PRBool result = PR_FALSE;

  if (nsnull == mEventCallback && nsnull == mMouseListener) {
    return result;
  }

  switch (aEventType) {
    case NS_MOUSE_LEFT_BUTTON_DOWN:
    case NS_MOUSE_MIDDLE_BUTTON_DOWN:
    case NS_MOUSE_RIGHT_BUTTON_DOWN:
        CaptureMouse(PR_TRUE);
      break;

    case NS_MOUSE_LEFT_BUTTON_UP:
    case NS_MOUSE_MIDDLE_BUTTON_UP:
    case NS_MOUSE_RIGHT_BUTTON_UP:
        CaptureMouse(PR_FALSE);
      break;

    default:
      break;

  } // switch

  return nsWindow::DispatchMouseEvent(aEventType, aPoint);
}

//-------------------------------------------------------------------------
//
// return the style for a child nsWindow
//
//-------------------------------------------------------------------------
DWORD ChildWindow::WindowStyle()
{
  return WS_CHILD | WS_CLIPCHILDREN | nsWindow::WindowStyle();
}


static char* GetACPString(const nsString& aStr)
{
   int acplen = aStr.Length() * 2 + 1;
   char * acp = new char[acplen];
   if(acp)
   {
      int outlen = ::WideCharToMultiByte( CP_ACP, 0, 
                      aStr.GetUnicode(), aStr.Length(),
                      acp, acplen, NULL, NULL);
      if ( outlen > 0)
         acp[outlen] = '\0';  // null terminate
   }
   return acp;
}

NS_METHOD nsWindow::SetTitle(const nsString& aTitle) 
{
  char* title = GetACPString(aTitle);
  if (title) {
    ::SendMessage(mWnd, WM_SETTEXT, (WPARAM)0, (LPARAM)(LPCTSTR)title);
    delete [] title;
  }
  return NS_OK;
} 


PRBool nsWindow::AutoErase()
{
  return(PR_FALSE);
}

NS_METHOD nsWindow::GetPreferredSize(PRInt32& aWidth, PRInt32& aHeight)
{
  aWidth  = mPreferredWidth;
  aHeight = mPreferredHeight;
  return NS_ERROR_FAILURE;
}

NS_METHOD nsWindow::SetPreferredSize(PRInt32 aWidth, PRInt32 aHeight)
{
  mPreferredWidth  = aWidth;
  mPreferredHeight = aHeight;
  return NS_OK;
}

void
nsWindow::HandleTextEvent(HIMC hIMEContext,PRBool aCheckAttr)
{
  NS_ASSERTION( mIMECompString, "mIMECompString is null");
  NS_ASSERTION( mIMECompUnicode, "mIMECompUnicode is null");
  NS_ASSERTION( mIMEIsComposing, "conflict state");
  if((nsnull == mIMECompString) || (nsnull == mIMECompUnicode))
	return;

  nsTextEvent		event;
  nsPoint			point;
  size_t			unicharSize;
  CANDIDATEFORM		candForm;
  point.x = 0;
  point.y = 0;

  InitEvent(event, NS_TEXT_EVENT, &point);
 
  //
  // convert the composition string text into unicode before it is sent to xp-land
  //
  unicharSize = ::MultiByteToWideChar(gCurrentKeyboardCP,MB_PRECOMPOSED,
	mIMECompString->GetBuffer(),
	mIMECompString->Length(),
	NULL,0);

  mIMECompUnicode->SetCapacity(unicharSize+1);

  unicharSize = ::MultiByteToWideChar(gCurrentKeyboardCP,MB_PRECOMPOSED,
	mIMECompString->GetBuffer(),
	mIMECompString->Length(),
	(PRUnichar*)mIMECompUnicode->GetUnicode(),
	mIMECompUnicode->mCapacity);
  ((PRUnichar*)mIMECompUnicode->GetUnicode())[unicharSize] = (PRUnichar) 0;
  mIMECompUnicode->mLength = unicharSize;

  //
  // we need to convert the attribute array, which is alligned with the mutibyte text into an array of offsets
  // mapped to the unicode text
  //
  
  if(aCheckAttr) {
     MapDBCSAtrributeArrayToUnicodeOffsets(&(event.rangeCount),&(event.rangeArray));
  } else {
     event.rangeCount = 0;
     event.rangeArray = nsnull;
  }

  event.theText = (PRUnichar*)mIMECompUnicode->GetUnicode();
  event.isShift	= mIsShiftDown;
  event.isControl = mIsControlDown;
  event.isMeta	= PR_FALSE;
  event.isAlt = mIsAltDown;
  event.eventStructType = NS_TEXT_EVENT;

  (void)DispatchWindowEvent(&event);
  NS_RELEASE(event.widget);

  if(event.rangeArray)
     delete [] event.rangeArray;

  //
  // Post process event
  //
  candForm.dwIndex = 0;
  candForm.dwStyle = CFS_CANDIDATEPOS;
  candForm.ptCurrentPos.x = event.theReply.mCursorPosition.x + IME_X_OFFSET;
  candForm.ptCurrentPos.y = event.theReply.mCursorPosition.y + IME_Y_OFFSET
                          + event.theReply.mCursorPosition.height ;

  printf("Candidate window position: x=%d, y=%d\n",candForm.ptCurrentPos.x,candForm.ptCurrentPos.y);

  NS_IMM_SETCANDIDATEWINDOW(hIMEContext,&candForm);

}

void
nsWindow::HandleStartComposition(HIMC hIMEContext)
{
	NS_ASSERTION( !mIMEIsComposing, "conflict state");
	nsCompositionEvent	event;
	nsPoint				point;
	CANDIDATEFORM		candForm;

	point.x	= 0;
	point.y = 0;

	InitEvent(event,NS_COMPOSITION_START,&point);
	event.eventStructType = NS_COMPOSITION_START;
	event.compositionMessage = NS_COMPOSITION_START;
	(void)DispatchWindowEvent(&event);

	//
	// Post process event
	//
	candForm.dwIndex = 0;
	candForm.dwStyle = CFS_CANDIDATEPOS;
	candForm.ptCurrentPos.x = event.theReply.mCursorPosition.x + IME_X_OFFSET;
	candForm.ptCurrentPos.y = event.theReply.mCursorPosition.y + IME_Y_OFFSET
	                        + event.theReply.mCursorPosition.height;
#ifdef DEBUG_IME2
	printf("Candidate window position: x=%d, y=%d\n",candForm.ptCurrentPos.x,candForm.ptCurrentPos.y);
#endif
	NS_IMM_SETCANDIDATEWINDOW(hIMEContext, &candForm);
	NS_RELEASE(event.widget);

	if(nsnull == mIMECompString)
		mIMECompString = new nsCAutoString();
	if(nsnull == mIMECompUnicode)
		mIMECompUnicode = new nsAutoString();
	mIMEIsComposing = PR_TRUE;

}

void
nsWindow::HandleEndComposition(void)
{
	NS_ASSERTION(mIMEIsComposing, "conflict state");
	nsCompositionEvent	event;
	nsPoint				point;

	point.x	= 0;
	point.y = 0;

	InitEvent(event,NS_COMPOSITION_END,&point);
	event.eventStructType = NS_COMPOSITION_END;
	event.compositionMessage = NS_COMPOSITION_END;
	(void)DispatchWindowEvent(&event);
	NS_RELEASE(event.widget);
	mIMEIsComposing = PR_FALSE;
}

static PRUint32 PlatformToNSAttr(PRUint8 aAttr)
{
 switch(aAttr)
 {
    case ATTR_INPUT_ERROR:
    // case ATTR_FIXEDCONVERTED:
    case ATTR_INPUT:
         return NS_TEXTRANGE_RAWINPUT;
    case ATTR_CONVERTED:
         return NS_TEXTRANGE_CONVERTEDTEXT;
    case ATTR_TARGET_NOTCONVERTED:
         return NS_TEXTRANGE_SELECTEDRAWTEXT;
    case ATTR_TARGET_CONVERTED:
         return NS_TEXTRANGE_SELECTEDCONVERTEDTEXT;
    default:
         NS_ASSERTION(PR_FALSE, "unknown attribute");
         return NS_TEXTRANGE_CARETPOSITION;
 }
}
//
// This function converters the composition string (CGS_COMPSTR) into Unicode while mapping the 
//  attribute (GCS_ATTR) string t
void 
nsWindow::MapDBCSAtrributeArrayToUnicodeOffsets(PRUint32* textRangeListLengthResult,nsTextRangeArray* textRangeListResult)
{
  NS_ASSERTION( mIMECompString, "mIMECompString is null");
  NS_ASSERTION( mIMECompUnicode, "mIMECompUnicode is null");
  if((nsnull == mIMECompString) || (nsnull == mIMECompUnicode))
	return;
	PRInt32	rangePointer;
	size_t		lastUnicodeOffset, substringLength, lastMBCSOffset;
	
  long maxlen = mIMECompString->Length();
  long cursor = mIMECursorPosition;
  NS_ASSERTION(cursor <= maxlen, "wrong cursor positoin");
  if(cursor > maxlen)
    cursor = maxlen;

	//
	// figure out the ranges from the compclause string
	//
	if (mIMECompClauseStringLength==0) {
		*textRangeListLengthResult = 2;
		*textRangeListResult = new nsTextRange[2];
		(*textRangeListResult)[0].mStartOffset=0;
		substringLength = ::MultiByteToWideChar(gCurrentKeyboardCP,MB_PRECOMPOSED,
			mIMECompString->GetBuffer(), maxlen,NULL,0);
		(*textRangeListResult)[0].mEndOffset = substringLength;
		(*textRangeListResult)[0].mRangeType = NS_TEXTRANGE_RAWINPUT;
		substringLength = ::MultiByteToWideChar(gCurrentKeyboardCP,MB_PRECOMPOSED,mIMECompString->GetBuffer(),
								cursor,NULL,0);
		(*textRangeListResult)[1].mStartOffset=substringLength;
		(*textRangeListResult)[1].mEndOffset = substringLength;
		(*textRangeListResult)[1].mRangeType = NS_TEXTRANGE_CARETPOSITION;

		
	} else {
		
		*textRangeListLengthResult =  mIMECompClauseStringLength;

		//
		//  allocate the offset array
		//
		*textRangeListResult = new nsTextRange[*textRangeListLengthResult];

		//
		// figure out the cursor position
		//
		
		substringLength = ::MultiByteToWideChar(gCurrentKeyboardCP,
          MB_PRECOMPOSED,mIMECompString->GetBuffer(),cursor,NULL,0);
		(*textRangeListResult)[0].mStartOffset=substringLength;
		(*textRangeListResult)[0].mEndOffset = substringLength;
		(*textRangeListResult)[0].mRangeType = NS_TEXTRANGE_CARETPOSITION;

	
		//
		// iterate over the attributes and convert them into unicode 
		for(rangePointer=1, lastUnicodeOffset= lastMBCSOffset = 0;
			rangePointer<mIMECompClauseStringLength;
				rangePointer++) 
		{
      long current = mIMECompClauseString[rangePointer];
  		NS_ASSERTION(current <= maxlen, "wrong offset");
  		if(current > maxlen)
				current = maxlen;

			(*textRangeListResult)[rangePointer].mRangeType = 
        PlatformToNSAttr(mIMEAttributeString[lastMBCSOffset]);
			(*textRangeListResult)[rangePointer].mStartOffset = lastUnicodeOffset;

			lastUnicodeOffset += ::MultiByteToWideChar(gCurrentKeyboardCP,
				MB_PRECOMPOSED,mIMECompString->GetBuffer()+lastMBCSOffset,
				current-lastMBCSOffset,NULL,0);

			(*textRangeListResult)[rangePointer].mEndOffset = lastUnicodeOffset;

			lastMBCSOffset = current;
		} // for
	} // if else


}




//==========================================================================
BOOL nsWindow::OnInputLangChange(HKL aHKL, LRESULT *oRetValue)			
{
#ifdef KE_DEBUG
	printf("OnInputLanguageChange\n");
#endif


        if(gKeyboardLayout != aHKL) 
        {
          gKeyboardLayout = aHKL;
	  *oRetValue = LangIDToCP((WORD)((DWORD)gKeyboardLayout & 0x0FFFF),
                                  gCurrentKeyboardCP);
        }
	ResetInputState();
	return PR_FALSE;   // always pass to child window
}
//==========================================================================
BOOL nsWindow::OnIMEChar(BYTE aByte1, BYTE aByte2, LPARAM aKeyState)
{
#ifdef DEBUG_IME
	printf("OnIMEChar\n");
#endif
	NS_ASSERTION(PR_TRUE, "should not got an WM_IME_CHAR");

	// not implement yet
	return PR_FALSE;
}
//==========================================================================
BOOL nsWindow::OnIMEComposition(LPARAM  aGCS)			
{
#ifdef DEBUG_IME
	printf("OnIMEComposition\n");
#endif
  NS_ASSERTION( mIMECompString, "mIMECompString is null");
  NS_ASSERTION( mIMECompUnicode, "mIMECompUnicode is null");
  if((nsnull == mIMECompString) || (nsnull == mIMECompUnicode))
	return PR_TRUE;

	HIMC hIMEContext;

	BOOL result = PR_FALSE;					// will change this if an IME message we handle

	NS_IMM_GETCONTEXT(mWnd, hIMEContext);
	if (hIMEContext==NULL) 
		return PR_TRUE;

	//
	// This catches a fixed result
	//
	if (aGCS & GCS_RESULTSTR) {
#ifdef DEBUG_IME
		fprintf(stderr,"Handling GCS_RESULTSTR\n");
#endif
		if(! mIMEIsComposing) 
			HandleStartComposition(hIMEContext);

		long compStrLen;
		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext, GCS_RESULTSTR, NULL, 0, compStrLen);

		mIMECompString->SetCapacity(compStrLen+1);

		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext, GCS_RESULTSTR, (char*)mIMECompString->GetBuffer(), mIMECompString->mCapacity, compStrLen);
  	((char*)mIMECompString->GetBuffer())[compStrLen] = '\0';
		mIMECompString->mLength = compStrLen;

#ifdef DEBUG_IME
		fprintf(stderr,"GCS_RESULTSTR compStrLen = %d\n", compStrLen);
#endif
		result = PR_TRUE;
		HandleTextEvent(hIMEContext, PR_FALSE);
		HandleEndComposition();
	}


	//
	// This provides us with a composition string
	//
	if (aGCS & 
			(GCS_COMPSTR | GCS_COMPATTR | GCS_COMPCLAUSE | GCS_CURSORPOS ))
	{
#ifdef DEBUG_IME
		fprintf(stderr,"Handling GCS_COMPSTR\n");
#endif

		if(! mIMEIsComposing) 
			HandleStartComposition(hIMEContext);

		//--------------------------------------------------------
		// 1. Get GCS_COMPATTR
		//--------------------------------------------------------
		// This provides us with the attribute string necessary 
		// for doing hiliting
		long attrStrLen;
		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext, GCS_COMPATTR, NULL, 0, attrStrLen);
		if (attrStrLen>mIMEAttributeStringSize) {
			if (mIMEAttributeString!=NULL) 
				delete [] mIMEAttributeString;
			mIMEAttributeString = new PRUint8[attrStrLen+32];
			mIMEAttributeStringSize = attrStrLen+32;
		}

		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext, GCS_COMPATTR, mIMEAttributeString, mIMEAttributeStringSize, attrStrLen);
		mIMEAttributeStringLength = attrStrLen;

		//--------------------------------------------------------
		// 2. Get GCS_COMPCLAUSE
		//--------------------------------------------------------
		long compClauseLen;
		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext,
			GCS_COMPCLAUSE, NULL, 0, compClauseLen);
		compClauseLen = compClauseLen / sizeof(PRUint32);

		if (compClauseLen>mIMECompClauseStringSize) {
			if (mIMECompClauseString!=NULL) 
				delete [] mIMECompClauseString;
			mIMECompClauseString = new PRUint32 [compClauseLen+32];
			mIMECompClauseStringSize = compClauseLen+32;
		}

		long compClauseLen2;
		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext,
			GCS_COMPCLAUSE,
			mIMECompClauseString,
			mIMECompClauseStringSize * sizeof(PRUint32),
			compClauseLen2);
		compClauseLen2 = compClauseLen2 / sizeof(PRUint32);
                NS_ASSERTION(compClauseLen2 == compClauseLen, "strange result");
                if(compClauseLen > compClauseLen2)
                  compClauseLen = compClauseLen2;
		mIMECompClauseStringLength = compClauseLen;
 

		//--------------------------------------------------------
		// 3. Get GCS_CURSOPOS
		//--------------------------------------------------------
		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext, GCS_CURSORPOS, NULL, 0, mIMECursorPosition);

		//--------------------------------------------------------
		// 4. Get GCS_COMPSTR
		//--------------------------------------------------------
		long compStrLen;
		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext, GCS_COMPSTR, NULL, 0, compStrLen);
		mIMECompString->SetCapacity(compStrLen+1);

		NS_IMM_GETCOMPOSITIONSTRING(hIMEContext,
			GCS_COMPSTR,
			(char*)mIMECompString->GetBuffer(),
			mIMECompString->mCapacity, compStrLen);
 		((char*)mIMECompString->GetBuffer())[compStrLen] = '\0';
		mIMECompString->mLength = compStrLen;

#ifdef DEBUG_IME
		fprintf(stderr,"GCS_COMPSTR compStrLen = %d\n", compStrLen);
#endif
#ifdef DEBUG
                for(int kk=0;kk<mIMECompClauseStringLength;kk++)
                {
                  NS_ASSERTION(mIMECompClauseString[kk] <= mIMECompString->mLength, "illegal pos");
                }
#endif
		//--------------------------------------------------------
		// 5. Sent the text event
		//--------------------------------------------------------
		HandleTextEvent(hIMEContext);
		result = PR_TRUE;
	}
	if(! result)
	{
#ifdef DEBUG_IME
		fprintf(stderr,"Haandle 0 length TextEvent. \n");
#endif
		if(! mIMEIsComposing) 
			HandleStartComposition(hIMEContext);

  		((char*)mIMECompString->GetBuffer())[0] = '\0';
		mIMECompString->mLength = 0;
		HandleTextEvent(hIMEContext,PR_FALSE);
		result = PR_TRUE;
	}

	NS_IMM_RELEASECONTEXT(mWnd, hIMEContext);
	return result;
}
//==========================================================================
BOOL nsWindow::OnIMECompositionFull()			
{
#ifdef DEBUG_IME2
	printf("OnIMECompositionFull\n");
#endif

	// not implement yet
	return PR_FALSE;
}
//==========================================================================
BOOL nsWindow::OnIMEEndComposition()			
{
#ifdef DEBUG_IME
	printf("OnIMEEndComposition\n");
#endif
	if(mIMEIsComposing)
	{
		HIMC hIMEContext;

		if ((mIMEProperty & IME_PROP_SPECIAL_UI) || 
			  (mIMEProperty & IME_PROP_AT_CARET)) 
			return PR_FALSE;

		NS_IMM_GETCONTEXT(mWnd, hIMEContext);
		if (hIMEContext==NULL) 
			return PR_TRUE;

		// IME on Korean NT somehow send WM_IME_ENDCOMPOSITION
		// first when we hit space in composition mode
		// we need to clear out the current composition string 
		// in that case. 
  		((char*)mIMECompString->GetBuffer())[0] = '\0';
		mIMECompString->mLength = 0;
		HandleTextEvent(hIMEContext, PR_FALSE);

		HandleEndComposition();
		NS_IMM_RELEASECONTEXT(mWnd, hIMEContext);
	}
	return PR_TRUE;
}
//==========================================================================
BOOL nsWindow::OnIMENotify(WPARAM  aIMN, LPARAM aData, LRESULT *oResult)	
{
#ifdef DEBUG_IME2
	printf("OnIMENotify ");
	switch(aIMN) {
		case IMN_CHANGECANDIDATE:
			printf("IMN_CHANGECANDIDATE %x\n", aData);
		break;
		case IMN_CLOSECANDIDATE:
			printf("IMN_CLOSECANDIDATE %x\n", aData);
		break;
		case IMN_CLOSESTATUSWINDOW:
			printf("IMN_CLOSESTATUSWINDOW\n");
		break;
		case IMN_GUIDELINE:
			printf("IMN_GUIDELINE\n");
		break;
		case IMN_OPENCANDIDATE:
			printf("IMN_OPENCANDIDATE %x\n", aData);
		break;
		case IMN_OPENSTATUSWINDOW:
			printf("IMN_OPENSTATUSWINDOW\n");
		break;
		case IMN_SETCANDIDATEPOS:
			printf("IMN_SETCANDIDATEPOS %x\n", aData);
		break;
		case IMN_SETCOMPOSITIONFONT:
			printf("IMN_SETCOMPOSITIONFONT\n");
		break;
		case IMN_SETCOMPOSITIONWINDOW:
			printf("IMN_SETCOMPOSITIONWINDOW\n");
		break;
		case IMN_SETCONVERSIONMODE:
			printf("IMN_SETCONVERSIONMODE\n");
		break;
		case IMN_SETOPENSTATUS:
			printf("IMN_SETOPENSTATUS\n");
		break;
		case IMN_SETSENTENCEMODE:
			printf("IMN_SETSENTENCEMODE\n");
		break;
		case IMN_SETSTATUSWINDOWPOS:
			printf("IMN_SETSTATUSWINDOWPOS\n");
		break;
		case IMN_PRIVATE:
			printf("IMN_PRIVATE\n");
		break;
	};
#endif

  // add hacky code here
  if(IS_VK_DOWN(NS_VK_ALT)) {
      mIsShiftDown = PR_FALSE;
      mIsControlDown = PR_FALSE;
      mIsAltDown = PR_TRUE;
      DispatchKeyEvent(NS_KEY_PRESS, 0, 192);// XXX hack hack hack
  }
	// not implement yet 
	return PR_FALSE;
}
//==========================================================================
BOOL nsWindow::OnIMERequest(WPARAM  aIMR, LPARAM aData, LRESULT *oResult)
{
#ifdef DEBUG_IME2
	printf("OnIMERequest\n");
#endif

	// not implement yet
	return PR_FALSE;
}
//==========================================================================
BOOL nsWindow::OnIMESelect(BOOL  aSelected, WORD aLangID)			
{
#ifdef DEBUG_IME2
	printf("OnIMESelect\n");
#endif

	// not implement yet
	return PR_FALSE;
}
//==========================================================================
BOOL nsWindow::OnIMESetContext(BOOL aActive, LPARAM& aISC)			
{
#ifdef DEBUG_IME2
	printf("OnIMESetContext %x %s %s %s Candidate[%s%s%s%s]\n", this, 
		(aActive ? "Active" : "Deactiv"),
		((aISC & ISC_SHOWUICOMPOSITIONWINDOW) ? "[Comp]" : ""),
		((aISC & ISC_SHOWUIGUIDELINE) ? "[GUID]" : ""),
		((aISC & ISC_SHOWUICANDIDATEWINDOW) ? "0" : ""),
		((aISC & (ISC_SHOWUICANDIDATEWINDOW<<1)) ? "1" : ""),
		((aISC & (ISC_SHOWUICANDIDATEWINDOW<<2)) ? "2" : ""),
		((aISC & (ISC_SHOWUICANDIDATEWINDOW<<3)) ? "3" : "")
	);
#endif
	if(! aActive)
		ResetInputState();

	aISC &= ~ ISC_SHOWUICOMPOSITIONWINDOW;
	// We still return false here because we need to pass the 
	// aISC w/ ISC_SHOWUICOMPOSITIONWINDOW clear to the default
	// window proc so it will draw the candidcate window for us...
	return PR_FALSE;
}
//==========================================================================
BOOL nsWindow::OnIMEStartComposition()
{
#ifdef DEBUG_IME
	printf("OnIMEStartComposition\n");
#endif
	HIMC hIMEContext;

	if ((mIMEProperty & IME_PROP_SPECIAL_UI) || 
      (mIMEProperty & IME_PROP_AT_CARET)) 
		return PR_FALSE;

	NS_IMM_GETCONTEXT(mWnd, hIMEContext);
	if (hIMEContext==NULL) 
		return PR_TRUE;

	HandleStartComposition(hIMEContext);
	NS_IMM_RELEASECONTEXT(mWnd, hIMEContext);
	return PR_TRUE;
}

//==========================================================================
NS_IMETHODIMP nsWindow::ResetInputState()
{
#ifdef DEBUG_KBSTATE
	printf("ResetInputState\n");
#endif 
	//if(mIMEIsComposing) {
		HIMC hIMC;
		NS_IMM_GETCONTEXT(mWnd, hIMC);
		if(hIMC) {
			BOOL ret = NS_IMM_NOTIFYIME(hIMC, NI_COMPOSITIONSTR, CPS_COMPLETE, NULL);
			//NS_ASSERTION(ret, "ImmNotify failed");
			NS_IMM_RELEASECONTEXT(mWnd, hIMC);
		}
	//}
	return NS_OK;
}
NS_IMETHODIMP nsWindow::PasswordFieldInit()
{
#ifdef DEBUG_KBSTATE
	printf("PasswordFieldInit\n");
#endif 
	return NS_OK;
}
NS_IMETHODIMP nsWindow::PasswordFieldEnter(PRUint32& oState)
{
#ifdef DEBUG_KBSTATE
	printf("PasswordFieldEnter\n");
#endif 
	if(IS_IME_CODEPAGE(gCurrentKeyboardCP))
	{
		HIMC hIMC;
		NS_IMM_GETCONTEXT(mWnd, hIMC);
		if(hIMC) {
			DWORD st1,st2;
     
			BOOL ret = NS_IMM_GETCONVERSIONSTATUS(hIMC, &st1, &st2);
			NS_ASSERTION(ret, "ImmGetConversionStatus failed");
			if(ret) {
				oState = st1;
				ret = NS_IMM_SETCONVERSIONSTATUS(hIMC, IME_CMODE_NOCONVERSION, st2);
				NS_ASSERTION(ret, "ImmSetConversionStatus failed");
			}
			NS_IMM_RELEASECONTEXT(mWnd, hIMC);
		}
	}
	return NS_OK;
}

NS_IMETHODIMP nsWindow::PasswordFieldExit(PRUint32 aState)
{
#ifdef DEBUG_KBSTATE
	printf("PasswordFieldExit\n");
#endif 
	if(IS_IME_CODEPAGE(gCurrentKeyboardCP))
	{
		HIMC hIMC;
		NS_IMM_GETCONTEXT(mWnd, hIMC);
		if(hIMC) {
			DWORD st1,st2;
	     
			BOOL ret = NS_IMM_GETCONVERSIONSTATUS(hIMC, &st1, &st2);
			NS_ASSERTION(ret, "ImmGetConversionStatus failed");
			if(ret) {
				ret = NS_IMM_SETCONVERSIONSTATUS(hIMC, (DWORD)aState, st2);
				NS_ASSERTION(ret, "ImmSetConversionStatus failed");
			}
			NS_IMM_RELEASECONTEXT(mWnd, hIMC);
		}
	}
	return NS_OK;
}

// Pick some random timer ID.  Is there a better way?
#define NS_FLASH_TIMER_ID 0x011231984

// This function is called on a timer to do the flashing.  It simply toggles the flash
// status until the window comes to the foreground.
static VOID CALLBACK nsGetAttentionTimerFunc( HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime ) {
    // Flash the window until we're in the foreground.
    if ( GetForegroundWindow() != hwnd ) {
        // We're not in the foreground yet.
        FlashWindow( hwnd, TRUE );
    } else {
        KillTimer( hwnd, idEvent );
    }
}

// Draw user's attention to this window until it comes to foreground.
NS_IMETHODIMP
nsWindow::GetAttention() {
    // Got window?
    if ( !mWnd ) {
        return NS_ERROR_NOT_INITIALIZED;
    }

    // If window is in foreground, no notification is necessary.
    if ( GetForegroundWindow() != mWnd ) {
        // Kick off timer that does single flash till window comes to foreground.
        SetTimer( mWnd, NS_FLASH_TIMER_ID, GetCaretBlinkTime(), (TIMERPROC)nsGetAttentionTimerFunc );
    }

    return NS_OK;
}