gecko/widget/src/windows/nsWindow.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sts=2 sw=2 et cin: */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Dean Tessman <dean_tessman@hotmail.com>
 *   Ere Maijala <emaijala@kolumbus.fi>
 *   Mark Hammond <markh@activestate.com>
 *   Michael Lowe <michael.lowe@bigfoot.com>
 *   Peter Bajusz <hyp-x@inf.bme.hu>
 *   Pierre Phaneuf <pp@ludusdesign.com>
 *   Robert O'Callahan <roc+moz@cs.cmu.edu>
 *   Roy Yokoyama <yokoyama@netscape.com>
 *   Makoto Kato  <m_kato@ga2.so-net.ne.jp>
 *   Masayuki Nakano <masayuki@d-toybox.com>
 *   Dainis Jonitis <Dainis_Jonitis@swh-t.lv>
 *   Christian Biesinger <cbiesinger@web.de>
 *   Mats Palmgren <mats.palmgren@bredband.net>
 *   Ningjie Chen <chenn@email.uc.edu>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsWindow.h"
#include "nsIAppShell.h"
#include "nsIFontMetrics.h"
#include "nsIFontEnumerator.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsFont.h"
#include "nsGUIEvent.h"
#include "nsIRenderingContext.h"
#include "nsIDeviceContext.h"
#include "nsIScreenManager.h"
#include "nsRect.h"
#include "nsTransform2D.h"
#include "nsThreadUtils.h"
#include "nsIObserverService.h"
#include "imgIContainer.h"
#include "gfxIImageFrame.h"
#include "nsNativeCharsetUtils.h"
#include "nsWidgetAtoms.h"
#include <windows.h>
#include <process.h>
#include "nsUnicharUtils.h"
#include "prlog.h"
#include "nsISupportsPrimitives.h"
#include "gfxImageSurface.h"
#include "nsIDOMNSUIEvent.h"

#ifdef WINCE

#include "aygshell.h"
#include "imm.h"

#define PAINT_USE_IMAGE_SURFACE

// do 32->24 conversion before calling StretchDIBits
#define PAINT_USE_IMAGE_SURFACE_24BPP

#ifdef WINCE_WINDOWS_MOBILE
#define WINCE_HAVE_SOFTKB
#include "tpcshell.h"
#else
#undef WINCE_HAVE_SOFTKB
#include "winuserm.h"
#endif

#else

#include "nsUXThemeData.h"
#include "nsUXThemeConstants.h"
#include "nsKeyboardLayout.h"
#include "nsNativeDragTarget.h"

#include <pbt.h>
#ifndef PBT_APMRESUMEAUTOMATIC
#define PBT_APMRESUMEAUTOMATIC 0x0012
#endif

// mmsystem.h is needed to build with WIN32_LEAN_AND_MEAN
#include <mmsystem.h>
#include <zmouse.h>
#endif


// unknwn.h is needed to build with WIN32_LEAN_AND_MEAN
#include <unknwn.h>

//#include "sysmets.h"
#include "nsGfxCIID.h"
#include "resource.h"
#include <commctrl.h>
#include "prtime.h"
#include "gfxContext.h"
#include "gfxWindowsSurface.h"
#include "nsIImage.h"

#ifdef ACCESSIBILITY
#include "OLEIDL.H"
#include <winuser.h>
#ifndef WINABLEAPI
#include <winable.h>
#endif
#include "nsIAccessible.h"
#include "nsIAccessibleDocument.h"
#include "nsIAccessNode.h"
#ifndef WM_GETOBJECT
#define WM_GETOBJECT 0x03d
#endif
#endif

#include "nsIRollupListener.h"
#include "nsIMenuRollup.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 "nsITheme.h"

// For SetIcon
#include "nsILocalFile.h"
#include "nsCRT.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsXPIDLString.h"
#include "nsIFile.h"

#include "prprf.h"
#include "prmem.h"

#ifdef NS_ENABLE_TSF
#include "nsTextStore.h"
#endif //NS_ENABLE_TSF

// Don't put more than this many rects in the dirty region, just fluff
// out to the bounding-box if there are more
#define MAX_RECTS_IN_REGION 100

#ifdef PAINT_USE_IMAGE_SURFACE
static nsAutoPtr<PRUint8> gSharedSurfaceData;
static gfxIntSize gSharedSurfaceSize;
#endif

/*
 * WinCE helpers
 */
#ifdef WINCE

#ifdef WINCE_HAVE_SOFTKB
static PRBool gSoftKeyMenuBar = PR_FALSE;
static PRBool gSoftKeyboardState = PR_FALSE;

static void ToggleSoftKB(PRBool show)
{
  HWND hWndSIP = FindWindowW(L"SipWndClass", NULL );
  if (hWndSIP)
    ::ShowWindow(hWndSIP, show ? SW_SHOW: SW_HIDE);

  hWndSIP = FindWindowW(L"MS_SIPBUTTON", NULL ); 
  if (hWndSIP)
    ShowWindow(hWndSIP, show ? SW_SHOW: SW_HIDE);

  SHSipPreference(NULL, show ? SIP_UP: SIP_DOWN);
}

static void CreateSoftKeyMenuBar(HWND wnd)
{
  if (!wnd)
    return;
  
  static HWND gSoftKeyMenuBar = nsnull;
  
  if (gSoftKeyMenuBar != nsnull)
    return;
  
  SHMENUBARINFO mbi;
  ZeroMemory(&mbi, sizeof(SHMENUBARINFO));
  mbi.cbSize = sizeof(SHMENUBARINFO);
  mbi.hwndParent = wnd;
  
  //  On windows ce smartphone, events never occur if the
  //  menubar is empty.  This doesn't work: 
  //  mbi.dwFlags = SHCMBF_EMPTYBAR;
  
  mbi.nToolBarId = IDC_DUMMY_CE_MENUBAR;
  mbi.hInstRes   = GetModuleHandle(NULL);
  
  if (!SHCreateMenuBar(&mbi))
    return;
  
  SetWindowPos(mbi.hwndMB, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOACTIVATE);
  
  SendMessage(mbi.hwndMB, SHCMBM_OVERRIDEKEY, VK_TBACK,
              MAKELPARAM(SHMBOF_NODEFAULT | SHMBOF_NOTIFY,
                         SHMBOF_NODEFAULT | SHMBOF_NOTIFY));
  
  SendMessage(mbi.hwndMB, SHCMBM_OVERRIDEKEY, VK_TSOFT1, 
              MAKELPARAM (SHMBOF_NODEFAULT | SHMBOF_NOTIFY, 
                          SHMBOF_NODEFAULT | SHMBOF_NOTIFY));
  
  SendMessage(mbi.hwndMB, SHCMBM_OVERRIDEKEY, VK_TSOFT2, 
              MAKELPARAM (SHMBOF_NODEFAULT | SHMBOF_NOTIFY, 
                          SHMBOF_NODEFAULT | SHMBOF_NOTIFY));
  
  gSoftKeyMenuBar = mbi.hwndMB;
}
#endif  //defined(WINCE_HAVE_SOFTKB)


#define IDI_APPLICATION MAKEINTRESOURCE(32512)

#define RDW_NOINTERNALPAINT 0

#define SetWindowLongPtrA SetWindowLongW
#define SetWindowLongPtrW SetWindowLongW
#define GetWindowLongPtrW GetWindowLongW
#define GWLP_WNDPROC   GWL_WNDPROC
#define GetPropW       GetProp
#define SetPropW       SetProp
#define RemovePropW    RemoveProp

#define MapVirtualKeyEx(a,b,c) MapVirtualKey(a,b)

inline void FlashWindow(HWND window, BOOL ignore){}
inline int  GetMessageTime() {return 0;}
inline BOOL IsIconic(HWND inWnd){return false;}

typedef struct ECWWindows
{
  LPARAM      params;
  WNDENUMPROC func;
  HWND        parent;
} ECWWindows;

static BOOL CALLBACK MyEnumWindowsProc(HWND hwnd, LPARAM lParam)
{
  ECWWindows *myParams = (ECWWindows*) lParam;
  
  if (IsChild(myParams->parent, hwnd))
  {
    return myParams->func(hwnd, myParams->params);
  }
  return TRUE;
}

inline BOOL EnumChildWindows(HWND inParent, WNDENUMPROC inFunc, LPARAM inParam)
{
  ECWWindows myParams;
  myParams.params = inParam;
  myParams.func   = inFunc;
  myParams.parent = inParent;
  
  return EnumWindows(MyEnumWindowsProc, (LPARAM) &myParams);
}

inline BOOL EnumThreadWindows(DWORD inThreadID, WNDENUMPROC inFunc, LPARAM inParam)
{
  return FALSE;
}

#endif  //defined(WINCE)



#ifdef PR_LOGGING
PRLogModuleInfo* sWindowsLog = nsnull;
#endif

static const PRUnichar kMozHeapDumpMessageString[] = L"MOZ_HeapDump";

#define kWindowPositionSlop 20

#ifndef WM_MOUSEHWHEEL
#define WM_MOUSEHWHEEL 0x020E
#endif

#ifndef SPI_GETWHEELSCROLLCHARS
#define SPI_GETWHEELSCROLLCHARS 0x006C
#endif

#ifndef MAPVK_VSC_TO_VK
#define MAPVK_VK_TO_VSC  0
#define MAPVK_VSC_TO_VK  1
#define MAPVK_VK_TO_CHAR 2
#endif

// used for checking the lParam of WM_IME_COMPOSITION
#define IS_COMPOSING_LPARAM(lParam) \
          ((lParam) & (GCS_COMPSTR | GCS_COMPATTR | GCS_COMPCLAUSE | GCS_CURSORPOS))

static PRBool IsCursorTranslucencySupported() {
#ifdef WINCE
  return PR_FALSE;
#else
  static PRBool didCheck = PR_FALSE;
  static PRBool isSupported = PR_FALSE;
  if (!didCheck) {
    didCheck = PR_TRUE;
    // Cursor translucency is supported on Windows XP and newer
    isSupported = GetWindowsVersion() >= 0x501;
  }

  return isSupported;
#endif
}

PRInt32 GetWindowsVersion()
{
#ifdef WINCE
  return 0x500;
#else
  static PRInt32 version = 0;
  static PRBool didCheck = PR_FALSE;

  if (!didCheck)
  {
    didCheck = PR_TRUE;
    OSVERSIONINFOEX osInfo;
    osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
    // This cast is safe and supposed to be here, don't worry
    ::GetVersionEx((OSVERSIONINFO*)&osInfo);
    version = (osInfo.dwMajorVersion & 0xff) << 8 | (osInfo.dwMinorVersion & 0xff);
  }
  return version;
#endif
}


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

static const char *sScreenManagerContractID = "@mozilla.org/gfx/screenmanager;1";

////////////////////////////////////////////////////
// nsWindow Class static variable definitions
////////////////////////////////////////////////////
PRUint32   nsWindow::sInstanceCount            = 0;

PRBool     nsWindow::sIMEIsComposing           = PR_FALSE;
PRBool     nsWindow::sIMEIsStatusChanged       = PR_FALSE;

nsString*  nsWindow::sIMECompUnicode           = NULL;
PRUint8*   nsWindow::sIMEAttributeArray        = NULL;
PRInt32    nsWindow::sIMEAttributeArrayLength  = 0;
PRInt32    nsWindow::sIMEAttributeArraySize    = 0;
PRUint32*  nsWindow::sIMECompClauseArray       = NULL;
PRInt32    nsWindow::sIMECompClauseArrayLength = 0;
PRInt32    nsWindow::sIMECompClauseArraySize   = 0;

// Some IMEs (e.g., the standard IME for Korean) don't have caret position,
// then, we should not set caret position to text event.
#define NO_IME_CARET -1
long       nsWindow::sIMECursorPosition        = NO_IME_CARET;

PRBool     nsWindow::sIMENativeCaretIsCreated  = PR_FALSE;

RECT*      nsWindow::sIMECompCharPos           = nsnull;

PRBool     nsWindow::gSwitchKeyboardLayout     = PR_FALSE;

// imported in nsWidgetFactory.cpp
PRBool gDisableNativeTheme = PR_FALSE;

#ifndef WINCE
static KeyboardLayout gKbdLayout;
#endif

TriStateBool nsWindow::sCanQuit = TRI_UNKNOWN;

BOOL nsWindow::sIsRegistered       = FALSE;
BOOL nsWindow::sIsPopupClassRegistered = FALSE;
BOOL nsWindow::sIsOleInitialized = FALSE;
UINT nsWindow::uWM_MSIME_MOUSE     = 0; // mouse message for MSIME
UINT nsWindow::uWM_HEAP_DUMP       = 0; // Heap Dump to a file

HCURSOR        nsWindow::gHCursor            = NULL;
imgIContainer* nsWindow::gCursorImgContainer = nsnull;


#ifdef ACCESSIBILITY
BOOL nsWindow::gIsAccessibilityOn = FALSE;
#endif
nsWindow* nsWindow::gCurrentWindow = nsnull;
////////////////////////////////////////////////////

////////////////////////////////////////////////////
// Rollup Listener - static variable definitions
////////////////////////////////////////////////////
static nsIRollupListener * gRollupListener           = nsnull;
static nsIWidget         * gRollupWidget             = nsnull;
static PRBool              gRollupConsumeRollupEvent = PR_FALSE;

// Hook Data Memebers for Dropdowns
//
// gProcessHook Tells the hook methods whether they should be
//              processing the hook messages
//
static HHOOK        gMsgFilterHook = NULL;
static HHOOK        gCallProcHook  = NULL;
static HHOOK        gCallMouseHook = NULL;
static PRPackedBool gProcessHook   = PR_FALSE;
static UINT         gRollupMsgId   = 0;
static HWND         gRollupMsgWnd  = NULL;
static UINT         gHookTimerId   = 0;
////////////////////////////////////////////////////


////////////////////////////////////////////////////
// Mouse Clicks - static variable definitions
// for figuring out 1 - 3 Clicks
////////////////////////////////////////////////////
static POINT gLastMousePoint;
static POINT gLastMouseMovePoint;
static LONG  gLastMouseDownTime = 0L;
static LONG  gLastClickCount    = 0L;
static BYTE  gLastMouseButton = 0;
////////////////////////////////////////////////////

// The last user input event time in microseconds. If there are any pending
// native toolkit input events it returns the current time. The value is
// compatible with PR_IntervalToMicroseconds(PR_IntervalNow()).
#ifndef WINCE
static
#endif
PRUint32 gLastInputEventTime = 0;

static int gTrimOnMinimize = 2; // uninitialized, but still true

#if 0
static PRBool is_vk_down(int vk)
{
   SHORT st = GetKeyState(vk);
#ifdef DEBUG
   printf("is_vk_down vk=%x st=%x\n",vk, st);
#endif
   return (st < 0);
}
#define IS_VK_DOWN is_vk_down
#else
#define IS_VK_DOWN(a) (GetKeyState(a) < 0)
#endif

//
// App Command messages for IntelliMouse and Natural Keyboard Pro
//
// These messages are not included in Visual C++ 6.0, but are in 7.0
//
#ifndef WM_APPCOMMAND
#define WM_APPCOMMAND  0x0319
#endif

#ifndef APPCOMMAND_BROWSER_BACKWARD
#define APPCOMMAND_BROWSER_BACKWARD       1
#define APPCOMMAND_BROWSER_FORWARD        2
#define APPCOMMAND_BROWSER_REFRESH        3
#define APPCOMMAND_BROWSER_STOP           4
#define APPCOMMAND_BROWSER_SEARCH         5
#define APPCOMMAND_BROWSER_FAVORITES      6
#define APPCOMMAND_BROWSER_HOME           7
// keep these around in case we want them later
//#define APPCOMMAND_VOLUME_MUTE            8
//#define APPCOMMAND_VOLUME_DOWN            9
//#define APPCOMMAND_VOLUME_UP              10
//#define APPCOMMAND_MEDIA_NEXTTRACK        11
//#define APPCOMMAND_MEDIA_PREVIOUSTRACK    12
//#define APPCOMMAND_MEDIA_STOP             13
//#define APPCOMMAND_MEDIA_PLAY_PAUSE       14
//#define APPCOMMAND_LAUNCH_MAIL            15
//#define APPCOMMAND_LAUNCH_MEDIA_SELECT    16
//#define APPCOMMAND_LAUNCH_APP1            17
//#define APPCOMMAND_LAUNCH_APP2            18
//#define APPCOMMAND_BASS_DOWN              19
//#define APPCOMMAND_BASS_BOOST             20
//#define APPCOMMAND_BASS_UP                21
//#define APPCOMMAND_TREBLE_DOWN            22
//#define APPCOMMAND_TREBLE_UP              23

//#define FAPPCOMMAND_MOUSE 0x8000
//#define FAPPCOMMAND_KEY   0
//#define FAPPCOMMAND_OEM   0x1000
#define FAPPCOMMAND_MASK  0xF000

#define GET_APPCOMMAND_LPARAM(lParam) ((short)(HIWORD(lParam) & ~FAPPCOMMAND_MASK))
//#define GET_DEVICE_LPARAM(lParam)     ((WORD)(HIWORD(lParam) & FAPPCOMMAND_MASK))
//#define GET_MOUSEORKEY_LPARAM         GET_DEVICE_LPARAM
//#define GET_FLAGS_LPARAM(lParam)      (LOWORD(lParam))
//#define GET_KEYSTATE_LPARAM(lParam)   GET_FLAGS_LPARAM(lParam)

#endif  // #ifndef APPCOMMAND_BROWSER_BACKWARD

#define VERIFY_WINDOW_STYLE(s) \
  NS_ASSERTION(((s) & (WS_CHILD | WS_POPUP)) != (WS_CHILD | WS_POPUP), \
               "WS_POPUP and WS_CHILD are mutually exclusive")

HWND nsWindow::GetTopLevelHWND(HWND aWnd, PRBool aStopOnDialogOrPopup)
{
  HWND curWnd = aWnd;
  HWND topWnd = NULL;

  while (curWnd) {
    topWnd = curWnd;

    if (aStopOnDialogOrPopup) {
      DWORD_PTR style = ::GetWindowLongPtrW(curWnd, GWL_STYLE);

      VERIFY_WINDOW_STYLE(style);

      if (!(style & WS_CHILD)) // first top-level window
        break;
    }

    curWnd = ::GetParent(curWnd);       // Parent or owner (if has no parent)
  }

  return topWnd;
}

// Code to dispatch WM_SYSCOLORCHANGE message to all child windows.
// WM_SYSCOLORCHANGE is only sent to top-level windows, but the
// cross platform API requires that NS_SYSCOLORCHANGE message be sent to
// all child windows as well. When running in an embedded application
// we may not receive a WM_SYSCOLORCHANGE message because the top
// level window is owned by the embeddor. Note: this code can be used to
// dispatch other global messages (i.e messages that must be sent to all
// nsIWidget instances.

// Enumerate all child windows sending aMsg to each of them

BOOL CALLBACK nsWindow::BroadcastMsgToChildren(HWND aWnd, LPARAM aMsg)
{
  WNDPROC winProc = (WNDPROC)::GetWindowLongPtrW(aWnd, GWLP_WNDPROC);
  if (winProc == &nsWindow::WindowProc) {
    // it's one of our windows so go ahead and send a message to it
    ::CallWindowProcW(winProc, aWnd, aMsg, 0, 0);
  }
  return TRUE;
}

// Enumerate all top level windows specifying that the children of each
// top level window should be enumerated. Do *not* send the message to
// each top level window since it is assumed that the toolkit will send
// aMsg to them directly.

BOOL CALLBACK nsWindow::BroadcastMsg(HWND aTopWindow, LPARAM aMsg)
{
  // Iterate each of aTopWindows child windows sending the aMsg
  // to each of them.
  EnumChildWindows(aTopWindow, nsWindow::BroadcastMsgToChildren, aMsg);
  return TRUE;
}

// This method is called from nsToolkit::WindowProc to forward global
// messages which need to be dispatched to all child windows.

void nsWindow::GlobalMsgWindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  switch (msg) {
    case WM_SYSCOLORCHANGE:
      // System color changes are posted to top-level windows only.
      // The NS_SYSCOLORCHANGE must be dispatched to all child
      // windows as well.
     ::EnumThreadWindows(GetCurrentThreadId(), nsWindow::BroadcastMsg, msg);
    break;
  }
}

// End of the methods to dispatch global messages

//-------------------------------------------------------------------------
//
// nsWindow constructor
//
//-------------------------------------------------------------------------
nsWindow::nsWindow() : nsBaseWidget()
{
#ifdef PR_LOGGING
  if (!sWindowsLog)
    sWindowsLog = PR_NewLogModule("nsWindowsWidgets");
#endif

  mWnd                = 0;
  mPaintDC            = 0;
  mPrevWndProc        = NULL;
  mBackground         = ::GetSysColor(COLOR_BTNFACE);
  mBrush              = ::CreateSolidBrush(NSRGB_2_COLOREF(mBackground));
  mForeground         = ::GetSysColor(COLOR_WINDOWTEXT);
  mIsShiftDown        = PR_FALSE;
  mIsControlDown      = PR_FALSE;
  mIsAltDown          = PR_FALSE;
  mIsDestroying       = PR_FALSE;
  mDeferredPositioner = NULL;
  mLastPoint.x        = 0;
  mLastPoint.y        = 0;
  mIsVisible          = PR_FALSE;
  mHas3DBorder        = PR_FALSE;
#ifdef MOZ_XUL
  mTransparencyMode   = eTransparencyOpaque;
  mTransparentSurface = nsnull;
  mMemoryDC           = NULL;
#endif
  mWindowType         = eWindowType_child;
  mBorderStyle        = eBorderStyle_default;
  mUnicodeWidget      = PR_TRUE;
  mIsInMouseCapture   = PR_FALSE;
  mIsInMouseWheelProcessing = PR_FALSE;
  mLastSize.width     = 0;
  mLastSize.height    = 0;
  mOldStyle           = 0;
  mOldExStyle         = 0;
  mPainting           = 0;
  mOldIMC             = NULL;
  mIMEEnabled         = nsIWidget::IME_STATUS_ENABLED;
  mIsPluginWindow     = PR_FALSE;
  mPopupType          = ePopupTypeAny;

  mLeadByte = '\0';
  mBlurEventSuppressionLevel = 0;

  static BOOL gbInitGlobalValue = FALSE;
  if (! gbInitGlobalValue) {
    gbInitGlobalValue = TRUE;
#ifndef WINCE
    gKbdLayout.LoadLayout(::GetKeyboardLayout(0));
#endif
    // mouse message of MSIME98/2000
    nsWindow::uWM_MSIME_MOUSE     = ::RegisterWindowMessage(RWM_MOUSE);

    // Heap dump
    nsWindow::uWM_HEAP_DUMP = ::RegisterWindowMessageW(kMozHeapDumpMessageString);
  }

  mNativeDragTarget = nsnull;
  mIsTopWidgetWindow = PR_FALSE;
  mLastKeyboardLayout = 0;

#ifdef NS_ENABLE_TSF
  if (!sInstanceCount)
    nsTextStore::Initialize();
#endif //NS_ENABLE_TSF

#ifndef WINCE
  if (!sInstanceCount && SUCCEEDED(::OleInitialize(NULL))) {
    sIsOleInitialized = TRUE;
  }
  NS_ASSERTION(sIsOleInitialized, "***** OLE is not initialized!\n");
#endif

  // Set gLastInputEventTime to some valid number
  gLastInputEventTime = PR_IntervalToMicroseconds(PR_IntervalNow());

  sInstanceCount++;
}

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

  MouseTrailer* mtrailer = nsToolkit::gMouseTrailer;
  if (mtrailer) {
    if (mtrailer->GetMouseTrailerWindow() == mWnd)
      mtrailer->DestroyTimer();

    if (mtrailer->GetCaptureWindow() == mWnd)
      mtrailer->SetCaptureWindow(nsnull);
  }

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

  if (mCursor == -1) {
    // A successfull SetCursor call will destroy the custom cursor, if it's ours
    SetCursor(eCursor_standard);
  }

  sInstanceCount--;

#ifdef NS_ENABLE_TSF
  if (!sInstanceCount)
    nsTextStore::Terminate();
#endif //NS_ENABLE_TSF

#ifndef WINCE
  //
  // delete any of the IME structures that we allocated
  //
  if (sInstanceCount == 0) {
    if (sIMECompUnicode) 
      delete sIMECompUnicode;
    if (sIMEAttributeArray) 
      delete [] sIMEAttributeArray;
    if (sIMECompClauseArray) 
      delete [] sIMECompClauseArray;

    NS_IF_RELEASE(gCursorImgContainer);

    if (sIsOleInitialized) {
      ::OleFlushClipboard();
      ::OleUninitialize();
      sIsOleInitialized = FALSE;
    }
  }

  NS_IF_RELEASE(mNativeDragTarget);
#endif

}

NS_IMPL_ISUPPORTS_INHERITED0(nsWindow, nsBaseWidget)

NS_METHOD nsWindow::CaptureMouse(PRBool aCapture)
{
  if (!nsToolkit::gMouseTrailer) {
    NS_ERROR("nsWindow::CaptureMouse called after nsToolkit destroyed");
    return NS_OK;
  }

  if (aCapture) {
    nsToolkit::gMouseTrailer->SetCaptureWindow(mWnd);
    ::SetCapture(mWnd);
  } else {
    nsToolkit::gMouseTrailer->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;
}

nsIntPoint nsWindow::WidgetToScreenOffset()
{
  POINT point;
  point.x = 0;
  point.y = 0;
  ::ClientToScreen(mWnd, &point);
  return nsIntPoint(point.x, point.y);
}

LPARAM nsWindow::lParamToScreen(LPARAM lParam)
{
  POINT pt;
  pt.x = GET_X_LPARAM(lParam);
  pt.y = GET_Y_LPARAM(lParam);
  ::ClientToScreen(mWnd, &pt);
  return MAKELPARAM(pt.x, pt.y);
}

LPARAM nsWindow::lParamToClient(LPARAM lParam)
{
  POINT pt;
  pt.x = GET_X_LPARAM(lParam);
  pt.y = GET_Y_LPARAM(lParam);
  ::ScreenToClient(mWnd, &pt);
  return MAKELPARAM(pt.x, pt.y);
}

//-------------------------------------------------------------------------
//
// Initialize an event to dispatch
//
//-------------------------------------------------------------------------
void nsWindow::InitEvent(nsGUIEvent& event, nsIntPoint* aPoint)
{
  if (nsnull == aPoint) {     // use the point from the event
    // get the message position in client coordinates
    if (mWnd != NULL) {

      DWORD pos = ::GetMessagePos();
      POINT cpos;
      
      cpos.x = GET_X_LPARAM(pos);
      cpos.y = GET_Y_LPARAM(pos);

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

  event.time = ::GetMessageTime();

  mLastPoint = event.refPoint;
}

/* In some circumstances (opening dependent windows) it makes more sense
   (and fixes a crash bug) to not blur the parent window. */
void nsWindow::SuppressBlurEvents(PRBool aSuppress)
{
  if (aSuppress)
    ++mBlurEventSuppressionLevel; // for this widget
  else {
    NS_ASSERTION(mBlurEventSuppressionLevel > 0, "unbalanced blur event suppression");
    if (mBlurEventSuppressionLevel > 0)
      --mBlurEventSuppressionLevel;
  }
}

PRBool nsWindow::BlurEventsSuppressed()
{
  // are they suppressed in this window?
  if (mBlurEventSuppressionLevel > 0)
    return PR_TRUE;

  // are they suppressed by any container widget?
  HWND parentWnd = ::GetParent(mWnd);
  if (parentWnd) {
    nsWindow *parent = GetNSWindowPtr(parentWnd);
    if (parent)
      return parent->BlurEventsSuppressed();
  }
  return PR_FALSE;
}

//-------------------------------------------------------------------------
//
// 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,
                  nsCAutoString("something"),
                  (PRInt32) mWnd);
#endif // NS_DEBUG

  aStatus = nsEventStatus_eIgnore;

  // skip processing of suppressed blur events
  if ((event->message == NS_DEACTIVATE || event->message == NS_LOSTFOCUS) &&
      BlurEventsSuppressed())
    return NS_OK;

  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(PR_TRUE, aMsg, this);
  InitEvent(event);

  PRBool result = DispatchWindowEvent(&event);
  return result;
}

//-------------------------------------------------------------------------
//
// Dispatch app command event
//
//-------------------------------------------------------------------------
PRBool nsWindow::DispatchCommandEvent(PRUint32 aEventCommand)
{
  nsCOMPtr<nsIAtom> command;
  switch (aEventCommand) {
    case APPCOMMAND_BROWSER_BACKWARD:
      command = nsWidgetAtoms::Back;
      break;
    case APPCOMMAND_BROWSER_FORWARD:
      command = nsWidgetAtoms::Forward;
      break;
    case APPCOMMAND_BROWSER_REFRESH:
      command = nsWidgetAtoms::Reload;
      break;
    case APPCOMMAND_BROWSER_STOP:
      command = nsWidgetAtoms::Stop;
      break;
    case APPCOMMAND_BROWSER_SEARCH:
      command = nsWidgetAtoms::Search;
      break;
    case APPCOMMAND_BROWSER_FAVORITES:
      command = nsWidgetAtoms::Bookmarks;
      break;
    case APPCOMMAND_BROWSER_HOME:
      command = nsWidgetAtoms::Home;
      break;
    default:
      return PR_FALSE;
  }
  nsCommandEvent event(PR_TRUE, nsWidgetAtoms::onAppCommand, command, this);

  InitEvent(event);
  DispatchWindowEvent(&event);

  return PR_TRUE;
}

//-------------------------------------------------------------------------
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);

#ifndef WINCE
    if (!gMsgFilterHook && !gCallProcHook && !gCallMouseHook) {
      RegisterSpecialDropdownHooks();
    }
    gProcessHook = PR_TRUE;
#endif
    
  } else {
    NS_IF_RELEASE(gRollupListener);
    NS_IF_RELEASE(gRollupWidget);
    
#ifndef WINCE
    gProcessHook = PR_FALSE;
    UnregisterSpecialDropdownHooks();
#endif
  }

  return NS_OK;
}

PRBool
nsWindow::EventIsInsideWindow(UINT Msg, nsWindow* aWindow)
{
  RECT r;

#ifndef WINCE
  if (Msg == WM_ACTIVATEAPP)
    // don't care about activation/deactivation
    return PR_FALSE;
#else
  if (Msg == WM_ACTIVATE)
    // but on Windows CE we do care about
    // activation/deactivation because there doesn't exist
    // cancelable Mouse Activation events
    return PR_TRUE;
#endif

  ::GetWindowRect(aWindow->mWnd, &r);
  DWORD pos = ::GetMessagePos();
  POINT mp;
  mp.x = GET_X_LPARAM(pos);
  mp.y = GET_Y_LPARAM(pos);

  // was the event inside this window?
  return (PRBool) PtInRect(&r, mp);
}

static PRUnichar sPropName[40] = L"";
static PRUnichar* GetNSWindowPropName() {
  if (!*sPropName)
  {
    _snwprintf(sPropName, 39, L"MozillansIWidgetPtr%p", GetCurrentProcessId());
    sPropName[39] = '\0';
  }
  return sPropName;
}

nsWindow * nsWindow::GetNSWindowPtr(HWND aWnd) {
  return (nsWindow *) ::GetPropW(aWnd, GetNSWindowPropName());
}

BOOL nsWindow::SetNSWindowPtr(HWND aWnd, nsWindow * ptr) {
  if (ptr == NULL) {
    ::RemovePropW(aWnd, GetNSWindowPropName());
    return TRUE;
  } else {
    return ::SetPropW(aWnd, GetNSWindowPropName(), (HANDLE)ptr);
  }
}

//-------------------------------------------------------------------------
//
// the nsWindow procedure for all nsWindows in this toolkit
//
//-------------------------------------------------------------------------
LRESULT CALLBACK nsWindow::WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  // create this here so that we store the last rolled up popup until after
  // the event has been processed.
  nsAutoRollup autoRollup;

  LRESULT popupHandlingResult;
  if ( DealWithPopups(hWnd, msg, wParam, lParam, &popupHandlingResult) )
    return popupHandlingResult;

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

  // XXX This fixes 50208 and we are leaving 51174 open to further investigate
  // why we are hitting this assert
  if (nsnull == someWindow) {
    NS_ASSERTION(someWindow, "someWindow is null, cannot call any CallWindowProc");
    return ::DefWindowProcW(hWnd, msg, wParam, lParam);
  }

  // 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 = GetNSWindowPtr(pnmh->hwndFrom);
    }
  }

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

  return ::CallWindowProcW(someWindow->GetPrevWindowProc(),
                           hWnd, msg, wParam, lParam);
}

//WINOLEAPI oleStatus;
//-------------------------------------------------------------------------
//
// Utility method for implementing both Create(nsIWidget ...) and
// Create(nsNativeWidget...)
//-------------------------------------------------------------------------

nsresult
nsWindow::StandardWindowCreate(nsIWidget *aParent,
                               const nsIntRect &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 ||
                          aInitData->mWindowType == eWindowType_invisible) ?
                         nsnull : aParent;

  mIsTopWidgetWindow = (nsnull == baseParent);
  mBounds.width = aRect.width;
  mBounds.height = aRect.height;

  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 && !toolkit->IsGuiThread()) {
    DWORD_PTR args[7];
    args[0] = (DWORD_PTR)aParent;
    args[1] = (DWORD_PTR)&aRect;
    args[2] = (DWORD_PTR)aHandleEventFunction;
    args[3] = (DWORD_PTR)aContext;
    args[4] = (DWORD_PTR)aAppShell;
    args[5] = (DWORD_PTR)aToolkit;
    args[6] = (DWORD_PTR)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);
    mPopupType = aInitData->mPopupHint;
  }

  mContentType = aInitData ? aInitData->mContentType : eContentTypeInherit;

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

  if (mWindowType == eWindowType_popup) {
    // if a parent was specified, don't use WS_EX_TOPMOST so that the popup
    // only appears above the parent, instead of all windows
    if (aParent)
      extendedStyle = WS_EX_TOOLWINDOW;
    else
      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 = ::CreateWindowExW(extendedStyle,
                           aInitData && aInitData->mDropShadow ?
                           WindowPopupClass() : WindowClass(),
                           L"",
                           style,
                           aRect.x,
                           aRect.y,
                           aRect.width,
                           GetHeight(aRect.height),
                           parent,
                           NULL,
                           nsToolkit::mDllInstance,
                           NULL);

  if (!mWnd)
    return NS_ERROR_FAILURE;

  /*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);

  if (gTrimOnMinimize == 2 && mWindowType == eWindowType_invisible) {
    /* The internal variable set by the config.trim_on_minimize pref
       has not yet been initialized, and this is the hidden window
       (conveniently created before any visible windows, and after
       the profile has been initialized).
       
       Default config.trim_on_minimize to false, to fix bug 76831
       for good.  If anyone complains about this new default, saying
       that a Mozilla app hogs too much memory while minimized, they
       will have that entire bug tattooed on their backside. */

    gTrimOnMinimize = 0;
    nsCOMPtr<nsIPrefService> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
    if (prefs) {
      nsCOMPtr<nsIPrefBranch> prefBranch;
      prefs->GetBranch(0, getter_AddRefs(prefBranch));
      if (prefBranch) {

        PRBool temp;
        if (NS_SUCCEEDED(prefBranch->GetBoolPref("config.trim_on_minimize",
                                                 &temp))
            && temp)
          gTrimOnMinimize = 1;

        if (NS_SUCCEEDED(prefBranch->GetBoolPref("intl.keyboard.per_window_layout",
                                                 &temp)))
          gSwitchKeyboardLayout = temp;

        if (NS_SUCCEEDED(prefBranch->GetBoolPref("mozilla.widget.disable-native-theme",
                                                 &temp)))
          gDisableNativeTheme = temp;
      }
    }
  }
#if defined(WINCE_HAVE_SOFTKB)
  if (mWindowType == eWindowType_dialog || mWindowType == eWindowType_toplevel )
     CreateSoftKeyMenuBar(mWnd);
#endif

  // Enable gesture support for this window.
  if (mWindowType != eWindowType_invisible &&
      mWindowType != eWindowType_plugin &&
      mWindowType != eWindowType_java &&
      mWindowType != eWindowType_toplevel) {
    // eWindowType_toplevel is the top level main frame window. Gesture support
    // there prevents the user from interacting with the title bar or nc
    // areas using a single finger. Java and plugin windows can make their
    // own calls.
    mGesture.InitWinGestureSupport(mWnd);
  }

  return NS_OK;
}

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


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

NS_METHOD nsWindow::Create(nsNativeWidget aParent,
                           const nsIntRect &aRect,
                           EVENT_CALLBACK aHandleEventFunction,
                           nsIDeviceContext *aContext,
                           nsIAppShell *aAppShell,
                           nsIToolkit *aToolkit,
                           nsWidgetInitData *aInitData)
{
  if (aInitData)
    mUnicodeWidget = aInitData->mUnicode;
  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();
  }

  // just to be safe. If we're going away and for some reason we're still
  // the rollup widget, rollup and turn off capture.
  if ( this == gRollupWidget ) {
    if ( gRollupListener )
      gRollupListener->Rollup(nsnull);
    CaptureRollupEvents(nsnull, PR_FALSE, PR_TRUE);
  }

  EnableDragDrop(PR_FALSE);

  // destroy the HWND
  if (mWnd) {
    // prevent the widget from causing additional events
    mEventCallback = nsnull;

    // if IME is disabled, restore it.
    if (mOldIMC) {
      mOldIMC = ::ImmAssociateContext(mWnd, mOldIMC);
      NS_ASSERTION(!mOldIMC, "Another IMC was associated");
    }

    HICON icon;
    icon = (HICON) ::SendMessageW(mWnd, WM_SETICON, (WPARAM)ICON_BIG, (LPARAM) 0);
    if (icon)
      ::DestroyIcon(icon);

    icon = (HICON) ::SendMessageW(mWnd, WM_SETICON, (WPARAM)ICON_SMALL, (LPARAM) 0);
    if (icon)
      ::DestroyIcon(icon);

#ifdef MOZ_XUL
    if (eTransparencyTransparent == mTransparencyMode)
    {
      SetupTranslucentWindowMemoryBitmap(eTransparencyOpaque);

    }
#endif

    VERIFY(::DestroyWindow(mWnd));

    mWnd = NULL;
    //our windows can be subclassed by
    //others and these nameless, 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;
}

NS_IMETHODIMP nsWindow::SetParent(nsIWidget *aNewParent)
{
  if (aNewParent) {
    nsCOMPtr<nsIWidget> kungFuDeathGrip(this);

    nsIWidget* parent = GetParent();
    if (parent) {
      parent->RemoveChild(this);
    }

    HWND newParent = (HWND)aNewParent->GetNativeData(NS_NATIVE_WINDOW);
    NS_ASSERTION(newParent, "Parent widget has a null native window handle");
    if (newParent && mWnd) {
      ::SetParent(mWnd, newParent);
    }

    aNewParent->AddChild(this);

    return NS_OK;
  }

  nsCOMPtr<nsIWidget> kungFuDeathGrip(this);

  nsIWidget* parent = GetParent();

  if (parent) {
    parent->RemoveChild(this);
  }

  if (mWnd) {
    ::SetParent(mWnd, nsnull);
  }

  return NS_OK;
}


//-------------------------------------------------------------------------
//
// Get this nsWindow parent
//
//-------------------------------------------------------------------------
nsIWidget* nsWindow::GetParent(void)
{
  return GetParentWindow(PR_FALSE);
}

nsWindow* nsWindow::GetParentWindow(PRBool aIncludeOwner)
{
  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;
  }

  // If this widget has already been destroyed, pretend we have no parent.
  // This corresponds to code in Destroy which removes the destroyed
  // widget from its parent's child list.
  if (mIsDestroying || mOnDestroyCalled)
    return nsnull;


  // aIncludeOwner set to true implies walking the parent chain to retrieve the
  // root owner. aIncludeOwner set to false implies the search will stop at the
  // true parent (default).
  nsWindow* widget = nsnull;
  if (mWnd) {
#ifdef WINCE
    HWND parent = ::GetParent(mWnd);
#else
    HWND parent = nsnull;
    if (aIncludeOwner)
      parent = ::GetParent(mWnd);
    else
      parent = ::GetAncestor(mWnd, GA_PARENT);
#endif
    if (parent) {
      widget = GetNSWindowPtr(parent);
      if (widget) {
        // If the widget is in the process of being destroyed then
        // do NOT return it
        if (widget->mIsDestroying) {
          widget = nsnull;
        }
      }
    }
  }

  return widget;
}


//-------------------------------------------------------------------------
//
// Hide or show this component
//
//-------------------------------------------------------------------------
PRBool gWindowsVisible;

static BOOL CALLBACK gEnumWindowsProc(HWND hwnd, LPARAM lParam)
{
  DWORD pid;
  ::GetWindowThreadProcessId(hwnd, &pid);
  if (pid == GetCurrentProcessId() && ::IsWindowVisible(hwnd))
  {
    gWindowsVisible = PR_TRUE;
    return FALSE;
  }
  return TRUE;
}

PRBool nsWindow::CanTakeFocus()
{
  gWindowsVisible = PR_FALSE;
  EnumWindows(gEnumWindowsProc, 0);
  if (!gWindowsVisible) {
    return PR_TRUE;
  } else {
    HWND fgWnd = ::GetForegroundWindow();
    if (!fgWnd) {
      return PR_TRUE;
    }
    DWORD pid;
    GetWindowThreadProcessId(fgWnd, &pid);
    if (pid == GetCurrentProcessId()) {
      return PR_TRUE;
    }
  }
  return PR_FALSE;
}

NS_METHOD nsWindow::Show(PRBool bState)
{
  PRBool wasVisible = mIsVisible;
  // Set the status now so that anyone asking during ShowWindow or
  // SetWindowPos would get the correct answer.
  mIsVisible = bState;

  if (mWnd) {
    if (bState) {
      if (!wasVisible && mWindowType == eWindowType_toplevel) {
        switch (mSizeMode) {
#ifdef WINCE
          case nsSizeMode_Maximized :
            ::SetForegroundWindow(mWnd);
            ::ShowWindow(mWnd, SW_SHOWMAXIMIZED);
            break;
          // use default for nsSizeMode_Minimized on Windows CE
#else
          case nsSizeMode_Maximized :
            ::ShowWindow(mWnd, SW_SHOWMAXIMIZED);
            break;
          case nsSizeMode_Minimized :
            ::ShowWindow(mWnd, SW_SHOWMINIMIZED);
            break;
#endif
          default:
            if (CanTakeFocus()) {
#ifdef WINCE
              ::SetForegroundWindow(mWnd);
#endif
              ::ShowWindow(mWnd, SW_SHOWNORMAL);
            } else {
              // Place the window behind the foreground window
              // (as long as it is not topmost)
              HWND wndAfter = ::GetForegroundWindow();
              if (!wndAfter)
                wndAfter = HWND_BOTTOM;
              else if (GetWindowLongPtrW(wndAfter, GWL_EXSTYLE) & WS_EX_TOPMOST)
                wndAfter = HWND_TOP;
              ::SetWindowPos(mWnd, wndAfter, 0, 0, 0, 0, SWP_SHOWWINDOW | SWP_NOSIZE | 
                             SWP_NOMOVE | SWP_NOACTIVATE);
              GetAttention(2);
            }
            break;
        }
      } else {
        DWORD flags = SWP_NOSIZE | SWP_NOMOVE | SWP_SHOWWINDOW;
        if (wasVisible)
          flags |= SWP_NOZORDER;

        if (mWindowType == eWindowType_popup) {
#ifndef WINCE
          // ensure popups are the topmost of the TOPMOST
          // layer. Remember not to set the SWP_NOZORDER
          // flag as that might allow the taskbar to overlap
          // the popup.  However on windows ce, we need to
          // activate the popup or clicks will not be sent.
          flags |= SWP_NOACTIVATE;
#endif
          HWND owner = ::GetWindow(mWnd, GW_OWNER);
          ::SetWindowPos(mWnd, owner ? 0 : HWND_TOPMOST, 0, 0, 0, 0, flags);
        } else {
#ifndef WINCE
          if (mWindowType == eWindowType_dialog && !CanTakeFocus())
            flags |= SWP_NOACTIVATE;
#endif
          ::SetWindowPos(mWnd, HWND_TOP, 0, 0, 0, 0, flags);
        }
      }
    } else {
      if (mWindowType != eWindowType_dialog) {
        ::ShowWindow(mWnd, SW_HIDE);
      } else {
        ::SetWindowPos(mWnd, 0, 0, 0, 0, 0, SWP_HIDEWINDOW | SWP_NOSIZE | SWP_NOMOVE |
                       SWP_NOZORDER | SWP_NOACTIVATE);
      }
    }
  }
  
#ifdef MOZ_XUL
  if (!wasVisible && bState)
    Invalidate(PR_FALSE);
#endif

  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;
}

//-------------------------------------------------------------------------
//
// Position the window behind the given window
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::PlaceBehind(nsTopLevelWidgetZPlacement aPlacement,
                                nsIWidget *aWidget, PRBool aActivate)
{
  HWND behind = HWND_TOP;
  if (aPlacement == eZPlacementBottom)
    behind = HWND_BOTTOM;
  else if (aPlacement == eZPlacementBelow && aWidget)
    behind = (HWND)aWidget->GetNativeData(NS_NATIVE_WINDOW);
  UINT flags = SWP_NOMOVE | SWP_NOREPOSITION | SWP_NOSIZE;
  if (!aActivate)
    flags |= SWP_NOACTIVATE;

  if (!CanTakeFocus() && behind == HWND_TOP)
  {
    // Can't place the window to top so place it behind the foreground window
    // (as long as it is not topmost)
    HWND wndAfter = ::GetForegroundWindow();
    if (!wndAfter)
      behind = HWND_BOTTOM;
    else if (!(GetWindowLongPtrW(wndAfter, GWL_EXSTYLE) & WS_EX_TOPMOST))
      behind = wndAfter;
    flags |= SWP_NOACTIVATE;
  }

  ::SetWindowPos(mWnd, behind, 0, 0, 0, 0, flags);
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Maximize, minimize or restore the window.
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsWindow::SetSizeMode(PRInt32 aMode) {

  nsresult rv;

  // Let's not try and do anything if we're already in that state.
  // (This is needed to prevent problems when calling window.minimize(), which
  // calls us directly, and then the OS triggers another call to us.)
  if (aMode == mSizeMode)
    return NS_OK;

#ifdef WINCE_WINDOWS_MOBILE
  // on windows mobile, dialogs and top level windows are full screen
  // This is partly due to the lack of a GetWindowPlacement.
  if (mWindowType == eWindowType_dialog || mWindowType == eWindowType_toplevel) {
    aMode = nsSizeMode_Maximized;
  }
#endif

  // save the requested state
  rv = nsBaseWidget::SetSizeMode(aMode);
  if (NS_SUCCEEDED(rv) && mIsVisible) {
    int mode;

    switch (aMode) {
      case nsSizeMode_Maximized :
        mode = SW_MAXIMIZE;
        break;
#ifndef WINCE
      case nsSizeMode_Minimized :
        mode = gTrimOnMinimize ? SW_MINIMIZE : SW_SHOWMINIMIZED;
        if (!gTrimOnMinimize) {
          // Find the next window that is visible and not minimized.
          HWND hwndBelow = ::GetNextWindow(mWnd, GW_HWNDNEXT);
          while (hwndBelow && (!::IsWindowVisible(hwndBelow) ||
                               ::IsIconic(hwndBelow))) {
            hwndBelow = ::GetNextWindow(hwndBelow, GW_HWNDNEXT);
          }

          // Push ourselves to the bottom of the stack, then activate the
          // next window.
          ::SetWindowPos(mWnd, HWND_BOTTOM, 0, 0, 0, 0,
                         SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
          if (hwndBelow)
            ::SetForegroundWindow(hwndBelow);

          // Play the minimize sound while we're here, since that is also
          // forgotten when we use SW_SHOWMINIMIZED.
          ::PlaySoundW(L"Minimize", nsnull, SND_ALIAS | SND_NODEFAULT | SND_ASYNC);
        }
        break;
#endif
      default :
        mode = SW_RESTORE;
    }
    ::ShowWindow(mWnd, mode);
  }
  return rv;
}

//-------------------------------------------------------------------------
//
// Constrain a potential move to fit onscreen
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::ConstrainPosition(PRBool aAllowSlop,
                                      PRInt32 *aX, PRInt32 *aY)
{
  if (!mIsTopWidgetWindow) // only a problem for top-level windows
    return NS_OK;

  PRBool doConstrain = PR_FALSE; // whether we have enough info to do anything

  /* get our playing field. use the current screen, or failing that
    for any reason, use device caps for the default screen. */
  RECT screenRect;

  nsCOMPtr<nsIScreenManager> screenmgr = do_GetService(sScreenManagerContractID);
  if (screenmgr) {
    nsCOMPtr<nsIScreen> screen;
    PRInt32 left, top, width, height;

    // zero size rects confuse the screen manager
    width = mBounds.width > 0 ? mBounds.width : 1;
    height = mBounds.height > 0 ? mBounds.height : 1;
    screenmgr->ScreenForRect(*aX, *aY, width, height,
                             getter_AddRefs(screen));
    if (screen) {
      screen->GetAvailRect(&left, &top, &width, &height);
      screenRect.left = left;
      screenRect.right = left+width;
      screenRect.top = top;
      screenRect.bottom = top+height;
      doConstrain = PR_TRUE;
    }
  } else {
    if (mWnd) {
      HDC dc = ::GetDC(mWnd);
      if (dc) {
        if (::GetDeviceCaps(dc, TECHNOLOGY) == DT_RASDISPLAY) {
          ::SystemParametersInfo(SPI_GETWORKAREA, 0, &screenRect, 0);
          doConstrain = PR_TRUE;
        }
        ::ReleaseDC(mWnd, dc);
      }
    }
  }

  if (aAllowSlop) {
    if (*aX < screenRect.left - mBounds.width + kWindowPositionSlop)
      *aX = screenRect.left - mBounds.width + kWindowPositionSlop;
    else if (*aX >= screenRect.right - kWindowPositionSlop)
      *aX = screenRect.right - kWindowPositionSlop;

    if (*aY < screenRect.top - mBounds.height + kWindowPositionSlop)
      *aY = screenRect.top - mBounds.height + kWindowPositionSlop;
    else if (*aY >= screenRect.bottom - kWindowPositionSlop)
      *aY = screenRect.bottom - kWindowPositionSlop;

  } else {

    if (*aX < screenRect.left)
      *aX = screenRect.left;
    else if (*aX >= screenRect.right - mBounds.width)
      *aX = screenRect.right - mBounds.width;

    if (*aY < screenRect.top)
      *aY = screenRect.top;
    else if (*aY >= screenRect.bottom - mBounds.height)
      *aY = screenRect.bottom - mBounds.height;
  }

  return NS_OK;
}

// XP and Vista visual styles sometimes require window clipping regions to be applied for proper
// transparency. These routines are called on size and move operations.

void nsWindow::ClearThemeRegion()
{
#ifndef WINCE
  if (nsUXThemeData::sIsVistaOrLater && mTransparencyMode != eTransparencyGlass &&
      mWindowType == eWindowType_popup && (mPopupType == ePopupTypeTooltip || mPopupType == ePopupTypePanel)) {
    SetWindowRgn(mWnd, NULL, false);
  }
#endif
}

void nsWindow::SetThemeRegion()
{
#ifndef WINCE
  // Popup types that have a visual styles region applied (bug 376408). This can be expanded
  // for other window types as needed. The regions are applied generically to the base window
  // so default constants are used for part and state. At some point we might need part and
  // state values from nsNativeThemeWin's GetThemePartAndState, but currently windows that
  // change shape based on state haven't come up.
  if (nsUXThemeData::sIsVistaOrLater && mTransparencyMode != eTransparencyGlass &&
      mWindowType == eWindowType_popup && (mPopupType == ePopupTypeTooltip || mPopupType == ePopupTypePanel)) {
    HRGN hRgn = nsnull;
    RECT rect = {0,0,mBounds.width,mBounds.height};
    
    nsUXThemeData::getThemeBackgroundRegion(nsUXThemeData::GetTheme(eUXTooltip), GetDC(mWnd), TTP_STANDARD, TS_NORMAL, &rect, &hRgn);
    if (hRgn) {
      if (!SetWindowRgn(mWnd, hRgn, false)) // do not delete or alter hRgn if accepted.
        DeleteObject(hRgn);
    }
  }
#endif
}

//-------------------------------------------------------------------------
//
// Move this component
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Move(PRInt32 aX, PRInt32 aY)
{
  // Check to see if window needs to be moved 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

  // Only perform this check for non-popup windows, since the positioning can
  // in fact change even when the x/y do not.  We always need to perform the
  // check. See bug #97805 for details.
  if (mWindowType != eWindowType_popup && (mBounds.x == aX) && (mBounds.y == aY))
  {
    // Nothing to do, since it is already positioned correctly.
    return NS_OK;
  }

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

  if (mWnd) {
#ifdef DEBUG
    // complain if a window is moved offscreen (legal, but potentially worrisome)
    if (mIsTopWidgetWindow) { // only a problem for top-level windows
      // 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);
          // no annoying assertions. just mention the issue.
          if (aX < 0 || aX >= workArea.right || aY < 0 || aY >= workArea.bottom)
            printf("window moved to offscreen position\n");
        }
      ::ReleaseDC(mWnd, dc);
      }
    }
#endif

    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 {
      ClearThemeRegion();
      VERIFY(::SetWindowPos(mWnd, NULL, aX, aY, 0, 0,
                            SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOSIZE));
      SetThemeRegion();
    }
  }
  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");

#ifdef MOZ_XUL
  if (eTransparencyTransparent == mTransparencyMode)
    ResizeTranslucentWindow(aWidth, aHeight);
#endif

  // 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;
#ifndef WINCE
    if (!aRepaint) {
      flags |= SWP_NOREDRAW;
    }
#endif

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

  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");

#ifdef MOZ_XUL
  if (eTransparencyTransparent == mTransparencyMode)
    ResizeTranslucentWindow(aWidth, aHeight);
#endif

  // 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;
#ifndef WINCE
    if (!aRepaint) {
      flags |= SWP_NOREDRAW;
    }
#endif

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

  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;
}


NS_METHOD nsWindow::IsEnabled(PRBool *aState)
{
  NS_ENSURE_ARG_POINTER(aState);

#ifndef WINCE
  *aState = !mWnd || (::IsWindowEnabled(mWnd) && ::IsWindowEnabled(::GetAncestor(mWnd, GA_ROOT)));
#else
  *aState = !mWnd || (::IsWindowEnabled(mWnd) && ::IsWindowEnabled(mWnd));
#endif

  return NS_OK;
}


//-------------------------------------------------------------------------
//
// Give the focus to this component
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::SetFocus(PRBool aRaise)
{
  //
  // Switch to the "main gui thread" if necessary... This method must
  // be executed on the "gui thread"...
  //
  nsToolkit* toolkit = (nsToolkit *)mToolkit;
  NS_ASSERTION(toolkit != nsnull, "This should never be null!"); // Bug 57044
  if (toolkit != nsnull && !toolkit->IsGuiThread()) {
    MethodInfo info(this, nsWindow::SET_FOCUS);
    toolkit->CallMethod(&info);
    return NS_ERROR_FAILURE;
  }

  if (mWnd) {
    // Uniconify, if necessary
    HWND toplevelWnd = GetTopLevelHWND(mWnd);
    if (::IsIconic(toplevelWnd))
      ::ShowWindow(toplevelWnd, SW_RESTORE);
    ::SetFocus(mWnd);
  }
  return NS_OK;
}


//-------------------------------------------------------------------------
//
// Get this component dimension
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::GetBounds(nsIntRect &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(nsIntRect &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(nsIntRect &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);
  }
}

// like GetBounds, but don't offset by the parent
NS_METHOD nsWindow::GetScreenBounds(nsIntRect &aRect)
{
  if (mWnd) {
    RECT r;
    VERIFY(::GetWindowRect(mWnd, &r));

    aRect.width  = r.right - r.left;
    aRect.height = r.bottom - r.top;
    aRect.x = r.left;
    aRect.y = r.top;
  } else
    aRect = mBounds;

  return NS_OK;
}

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

  if (mBrush)
    ::DeleteObject(mBrush);

  mBrush = ::CreateSolidBrush(NSRGB_2_COLOREF(mBackground));
#ifndef WINCE
  if (mWnd != NULL) {
    ::SetClassLongPtrW(mWnd, GCLP_HBRBACKGROUND, (LONG_PTR)mBrush);
  }
#endif
  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(NULL, IDC_HAND);
      break;
    }

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

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

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

    case eCursor_nw_resize:
    case eCursor_se_resize:
      newCursor = ::LoadCursor(NULL, IDC_SIZENWSE);
      break;

    case eCursor_ne_resize:
    case eCursor_sw_resize:
      newCursor = ::LoadCursor(NULL, IDC_SIZENESW);
      break;

    case eCursor_crosshair:
      newCursor = ::LoadCursor(NULL, IDC_CROSS);
      break;

    case eCursor_move:
      newCursor = ::LoadCursor(NULL, IDC_SIZEALL);
      break;

    case eCursor_help:
      newCursor = ::LoadCursor(NULL, IDC_HELP);
      break;

    case eCursor_copy: // CSS3
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_COPY));
      break;

    case eCursor_alias:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ALIAS));
      break;

    case eCursor_cell:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_CELL));
      break;

    case eCursor_grab:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_GRAB));
      break;

    case eCursor_grabbing:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_GRABBING));
      break;

    case eCursor_spinning:
      newCursor = ::LoadCursor(NULL, IDC_APPSTARTING);
      break;

    case eCursor_context_menu:
      // XXX this CSS3 cursor needs to be implemented
      break;

    case eCursor_zoom_in:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ZOOMIN));
      break;

    case eCursor_zoom_out:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ZOOMOUT));
      break;

    case eCursor_not_allowed:
    case eCursor_no_drop:
      newCursor = ::LoadCursor(NULL, IDC_NO);
      break;

    case eCursor_col_resize:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_COLRESIZE));
      break;

    case eCursor_row_resize:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ROWRESIZE));
      break;

    case eCursor_vertical_text:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_VERTICALTEXT));
      break;

    case eCursor_all_scroll:
      // XXX not 100% appropriate perhaps
      newCursor = ::LoadCursor(NULL, IDC_SIZEALL);
      break;

    case eCursor_nesw_resize:
      newCursor = ::LoadCursor(NULL, IDC_SIZENESW);
      break;

    case eCursor_nwse_resize:
      newCursor = ::LoadCursor(NULL, IDC_SIZENWSE);
      break;

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

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

    case eCursor_none:
      newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_NONE));
      break;

    default:
      NS_ERROR("Invalid cursor type");
      break;
  }

  if (NULL != newCursor) {
    mCursor = aCursor;
    HCURSOR oldCursor = ::SetCursor(newCursor);
    
    if (gHCursor == oldCursor) {
      NS_IF_RELEASE(gCursorImgContainer);
      if (gHCursor != NULL)
        ::DestroyIcon(gHCursor);
      gHCursor = NULL;
    }
  }

  return NS_OK;
}

static PRUint8* Data32BitTo1Bit(PRUint8* aImageData,
                                PRUint32 aWidth, PRUint32 aHeight)
{
  // We need (aWidth + 7) / 8 bytes plus zero-padding up to a multiple of
  // 4 bytes for each row (HBITMAP requirement). Bug 353553.
  PRUint32 outBpr = ((aWidth + 31) / 8) & ~3;

  // Allocate and clear mask buffer
  PRUint8* outData = (PRUint8*)PR_Calloc(outBpr, aHeight);
  if (!outData)
    return NULL;

  PRInt32 *imageRow = (PRInt32*)aImageData;
  for (PRUint32 curRow = 0; curRow < aHeight; curRow++) {
    PRUint8 *outRow = outData + curRow * outBpr;
    PRUint8 mask = 0x80;
    for (PRUint32 curCol = 0; curCol < aWidth; curCol++) {
      // Use sign bit to test for transparency, as alpha byte is highest byte
      if (*imageRow++ < 0)
        *outRow |= mask;

      mask >>= 1;
      if (!mask) {
        outRow ++;
        mask = 0x80;
      }
    }
  }

  return outData;
}

/**
 * Convert the given image data to a HBITMAP. If the requested depth is
 * 32 bit and the OS supports translucency, a bitmap with an alpha channel
 * will be returned.
 *
 * @param aImageData The image data to convert. Must use the format accepted
 *                   by CreateDIBitmap.
 * @param aWidth     With of the bitmap, in pixels.
 * @param aHeight    Height of the image, in pixels.
 * @param aDepth     Image depth, in bits. Should be one of 1, 24 and 32.
 *
 * @return The HBITMAP representing the image. Caller should call
 *         DeleteObject when done with the bitmap.
 *         On failure, NULL will be returned.
 */
static HBITMAP DataToBitmap(PRUint8* aImageData,
                            PRUint32 aWidth,
                            PRUint32 aHeight,
                            PRUint32 aDepth)
{
#ifndef WINCE
  HDC dc = ::GetDC(NULL);

  if (aDepth == 32 && IsCursorTranslucencySupported()) {
    // Alpha channel. We need the new header.
    BITMAPV4HEADER head = { 0 };
    head.bV4Size = sizeof(head);
    head.bV4Width = aWidth;
    head.bV4Height = aHeight;
    head.bV4Planes = 1;
    head.bV4BitCount = aDepth;
    head.bV4V4Compression = BI_BITFIELDS;
    head.bV4SizeImage = 0; // Uncompressed
    head.bV4XPelsPerMeter = 0;
    head.bV4YPelsPerMeter = 0;
    head.bV4ClrUsed = 0;
    head.bV4ClrImportant = 0;

    head.bV4RedMask   = 0x00FF0000;
    head.bV4GreenMask = 0x0000FF00;
    head.bV4BlueMask  = 0x000000FF;
    head.bV4AlphaMask = 0xFF000000;

    HBITMAP bmp = ::CreateDIBitmap(dc,
                                   reinterpret_cast<CONST BITMAPINFOHEADER*>(&head),
                                   CBM_INIT,
                                   aImageData,
                                   reinterpret_cast<CONST BITMAPINFO*>(&head),
                                   DIB_RGB_COLORS);
    ::ReleaseDC(NULL, dc);
    return bmp;
  }

  char reserved_space[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 2];
  BITMAPINFOHEADER& head = *(BITMAPINFOHEADER*)reserved_space;

  head.biSize = sizeof(BITMAPINFOHEADER);
  head.biWidth = aWidth;
  head.biHeight = aHeight;
  head.biPlanes = 1;
  head.biBitCount = (WORD)aDepth;
  head.biCompression = BI_RGB;
  head.biSizeImage = 0; // Uncompressed
  head.biXPelsPerMeter = 0;
  head.biYPelsPerMeter = 0;
  head.biClrUsed = 0;
  head.biClrImportant = 0;
  
  BITMAPINFO& bi = *(BITMAPINFO*)reserved_space;

  if (aDepth == 1) {
    RGBQUAD black = { 0, 0, 0, 0 };
    RGBQUAD white = { 255, 255, 255, 0 };

    bi.bmiColors[0] = white;
    bi.bmiColors[1] = black;
  }

  HBITMAP bmp = ::CreateDIBitmap(dc, &head, CBM_INIT, aImageData, &bi, DIB_RGB_COLORS);
  ::ReleaseDC(NULL, dc);
  return bmp;
#else
  return nsnull;
#endif
}

NS_IMETHODIMP nsWindow::SetCursor(imgIContainer* aCursor,
                                  PRUint32 aHotspotX, PRUint32 aHotspotY)
{
  if (gCursorImgContainer == aCursor && gHCursor) {
    ::SetCursor(gHCursor);
    return NS_OK;
  }

  // Get the image data
  nsCOMPtr<gfxIImageFrame> frame;
  aCursor->GetFrameAt(0, getter_AddRefs(frame));
  if (!frame)
    return NS_ERROR_NOT_AVAILABLE;

  PRInt32 width, height;
  frame->GetWidth(&width);
  frame->GetHeight(&height);

  // Reject cursors greater than 128 pixels in either direction, to prevent
  // spoofing.
  // XXX ideally we should rescale. Also, we could modify the API to
  // allow trusted content to set larger cursors.
  if (width > 128 || height > 128)
    return NS_ERROR_NOT_AVAILABLE;

  frame->LockImageData();

  PRUint32 dataLen;
  PRUint8 *data;
  nsresult rv = frame->GetImageData(&data, &dataLen);
  if (NS_FAILED(rv)) {
    frame->UnlockImageData();
    return rv;
  }

  HBITMAP bmp = DataToBitmap(data, width, -height, 32);
  PRUint8* a1data = Data32BitTo1Bit(data, width, height);
  frame->UnlockImageData();
  if (!a1data) {
    return NS_ERROR_FAILURE;
  }

  HBITMAP mbmp = DataToBitmap(a1data, width, -height, 1);
  PR_Free(a1data);

  ICONINFO info = {0};
  info.fIcon = FALSE;
  info.xHotspot = aHotspotX;
  info.yHotspot = aHotspotY;
  info.hbmMask = mbmp;
  info.hbmColor = bmp;
  
  HCURSOR cursor = ::CreateIconIndirect(&info);
  ::DeleteObject(mbmp);
  ::DeleteObject(bmp);
  if (cursor == NULL) {
    return NS_ERROR_FAILURE;
  }

  mCursor = nsCursor(-1);
  ::SetCursor(cursor);

  NS_IF_RELEASE(gCursorImgContainer);
  gCursorImgContainer = aCursor;
  NS_ADDREF(gCursorImgContainer);

  if (gHCursor != NULL)
    ::DestroyIcon(gHCursor);
  gHCursor = cursor;

  return NS_OK;
}

NS_IMETHODIMP nsWindow::HideWindowChrome(PRBool aShouldHide)
{
  HWND hwnd = GetTopLevelHWND(mWnd, PR_TRUE);
  if (!GetNSWindowPtr(hwnd))
  {
    NS_WARNING("Trying to hide window decorations in an embedded context");
    return NS_ERROR_FAILURE;
  }

  DWORD_PTR style, exStyle;
  if (aShouldHide) {
    DWORD_PTR tempStyle = ::GetWindowLongPtrW(hwnd, GWL_STYLE);
    DWORD_PTR tempExStyle = ::GetWindowLongPtrW(hwnd, GWL_EXSTYLE);

    style = tempStyle & ~(WS_CAPTION | WS_THICKFRAME);
    exStyle = tempExStyle & ~(WS_EX_DLGMODALFRAME | WS_EX_WINDOWEDGE |
                              WS_EX_CLIENTEDGE | WS_EX_STATICEDGE);

    mOldStyle = tempStyle;
    mOldExStyle = tempExStyle;
  }
  else {
    if (!mOldStyle || !mOldExStyle) {
      mOldStyle = ::GetWindowLongPtrW(hwnd, GWL_STYLE);
      mOldExStyle = ::GetWindowLongPtrW(hwnd, GWL_EXSTYLE);
    }

    style = mOldStyle;
    exStyle = mOldExStyle;
  }

  VERIFY_WINDOW_STYLE(style);
  ::SetWindowLongPtrW(hwnd, GWL_STYLE, style);
  ::SetWindowLongPtrW(hwnd, GWL_EXSTYLE, exStyle);

  return NS_OK;
}

// ------------------------------------------------------------------------
//
// Validate a visible area of a widget.
//
// ------------------------------------------------------------------------

NS_METHOD nsWindow::Validate()
{
  if (mWnd)
    VERIFY(::ValidateRect(mWnd, NULL));
  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,
                         nsCAutoString("noname"),
                         (PRInt32) mWnd);
#endif // NS_DEBUG

    VERIFY(::InvalidateRect(mWnd, NULL, FALSE));

    if (aIsSynchronous) {
      VERIFY(::UpdateWindow(mWnd));
    }
  }
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Invalidate this component visible area
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Invalidate(const nsIntRect & aRect, PRBool aIsSynchronous)
{
  if (mWnd)
  {
#ifdef NS_DEBUG
    debug_DumpInvalidate(stdout,
                         this,
                         &aRect,
                         aIsSynchronous,
                         nsCAutoString("noname"),
                         (PRInt32) mWnd);
#endif // NS_DEBUG

    RECT rect;

    rect.left   = aRect.x;
    rect.top    = aRect.y;
    rect.right  = aRect.x + aRect.width;
    rect.bottom = aRect.y + aRect.height;

    VERIFY(::InvalidateRect(mWnd, &rect, FALSE));

    if (aIsSynchronous) {
      VERIFY(::UpdateWindow(mWnd));
    }
  }
  return NS_OK;
}

//-------------------------------------------------------------------------
//
// Force a synchronous repaint of the window
//
//-------------------------------------------------------------------------
NS_IMETHODIMP nsWindow::Update()
{
  nsresult rv = NS_OK;

  // 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 rv;
}

//-------------------------------------------------------------------------
//
// Return some native data according to aDataType
//
//-------------------------------------------------------------------------
void* nsWindow::GetNativeData(PRUint32 aDataType)
{
  switch (aDataType) {
    case NS_NATIVE_PLUGIN_PORT:
      mIsPluginWindow = 1;
    case NS_NATIVE_WIDGET:
    case NS_NATIVE_WINDOW:
      return (void*)mWnd;
    case NS_NATIVE_GRAPHIC:
      // XXX:  This is sleezy!!  Remember to Release the DC after using it!
#ifdef MOZ_XUL
      return (void*)(eTransparencyTransparent == mTransparencyMode) ?
        mMemoryDC : ::GetDC(mWnd);
#else
      return (void*)::GetDC(mWnd);
#endif

#ifdef NS_ENABLE_TSF
    case NS_NATIVE_TSF_THREAD_MGR:
      return nsTextStore::GetThreadMgr();
    case NS_NATIVE_TSF_CATEGORY_MGR:
      return nsTextStore::GetCategoryMgr();
    case NS_NATIVE_TSF_DISPLAY_ATTR_MGR:
      return nsTextStore::GetDisplayAttrMgr();
#endif //NS_ENABLE_TSF

    default:
      break;
  }

  return NULL;
}

//~~~
void nsWindow::FreeNativeData(void * data, PRUint32 aDataType)
{
  switch (aDataType)
  {
    case NS_NATIVE_GRAPHIC:
#ifdef MOZ_XUL
      if (eTransparencyTransparent != mTransparencyMode)
        ::ReleaseDC(mWnd, (HDC)data);
#else
      ::ReleaseDC(mWnd, (HDC)data);
#endif
      break;
    case NS_NATIVE_WIDGET:
    case NS_NATIVE_WINDOW:
    case NS_NATIVE_PLUGIN_PORT:
      break;
    default:
      break;
  }
}


// Invalidates a window if it's not one of ours, for example
// a window created by a plugin.
BOOL CALLBACK nsWindow::InvalidateForeignChildWindows(HWND aWnd, LPARAM aMsg)
{
  LONG_PTR proc = ::GetWindowLongPtrW(aWnd, GWLP_WNDPROC);
  if (proc != (LONG_PTR)&nsWindow::WindowProc) {
    // This window is not one of our windows so invalidate it.
    VERIFY(::InvalidateRect(aWnd, NULL, FALSE));    
  }
  return TRUE;
}


//-------------------------------------------------------------------------
//
// Scroll the bits of a window
//
//-------------------------------------------------------------------------
NS_METHOD nsWindow::Scroll(PRInt32 aDx, PRInt32 aDy, nsIntRect *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, NULL, (nsnull != aClipRect) ? &trect : NULL,
                   NULL, NULL, SW_INVALIDATE | SW_SCROLLCHILDREN);
  // Invalidate all child windows that aren't ours; we're moving them, and we
  // expect them to be painted at the new location even if they're outside the
  // region we're bit-blit scrolling. See bug 387701.
  ::EnumChildWindows(GetWindowHandle(), nsWindow::InvalidateForeignChildWindows, NULL);
  ::UpdateWindow(mWnd);
  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]),
             (nsIntRect&)*(nsIntRect*)(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]),
             (nsIntRect&)*(nsIntRect*)(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(PR_FALSE);
      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;
#ifndef WINCE
  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;
      }
      mNativeDragTarget->mDragCancelled = PR_TRUE;
      NS_RELEASE(mNativeDragTarget);
    }
  }
#endif
  return rv;
}

//-------------------------------------------------------------------------
UINT nsWindow::MapFromNativeToDOM(UINT aNativeKeyCode)
{
#ifndef WINCE
  switch (aNativeKeyCode) {
    case VK_OEM_1:     return NS_VK_SEMICOLON;     // 0xBA, For the US standard keyboard, the ';:' key
    case VK_OEM_PLUS:  return NS_VK_ADD;           // 0xBB, For any country/region, the '+' key
    case VK_OEM_MINUS: return NS_VK_SUBTRACT;      // 0xBD, For any country/region, the '-' key
  }
#endif

  return aNativeKeyCode;
}

//-------------------------------------------------------------------------
//
// OnKey
//
//-------------------------------------------------------------------------
PRBool nsWindow::DispatchKeyEvent(PRUint32 aEventType, WORD aCharCode,
                   const nsTArray<nsAlternativeCharCode>* aAlternativeCharCodes,
                   UINT aVirtualCharCode, const MSG *aMsg,
                   PRUint32 aFlags)
{
  nsKeyEvent event(PR_TRUE, aEventType, this);
  nsIntPoint point(0, 0);

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

  event.flags |= aFlags;
  event.charCode = aCharCode;
  if (aAlternativeCharCodes)
    event.alternativeCharCodes.AppendElements(*aAlternativeCharCodes);
  event.keyCode  = 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;

  nsPluginEvent pluginEvent;
  if (aMsg && PluginHasFocus()) {
    pluginEvent.event = aMsg->message;
    pluginEvent.wParam = aMsg->wParam;
    pluginEvent.lParam = aMsg->lParam;
    event.nativeMsg = (void *)&pluginEvent;
  }

  PRBool result = DispatchWindowEvent(&event);

  return result;
}

void nsWindow::RemoveMessageAndDispatchPluginEvent(UINT aFirstMsg,
                                                   UINT aLastMsg)
{
  MSG msg;
  ::GetMessageW(&msg, mWnd, aFirstMsg, aLastMsg);
  DispatchPluginEvent(msg);
}

static PRBool
StringCaseInsensitiveEquals(const PRUnichar* aChars1, const PRUint32 aNumChars1,
                            const PRUnichar* aChars2, const PRUint32 aNumChars2)
{
  if (aNumChars1 != aNumChars2)
    return PR_FALSE;

  nsCaseInsensitiveStringComparator comp;
  return comp(aChars1, aChars2, aNumChars1) == 0;
}

/**
 * nsWindow::OnKeyDown peeks into the message queue and pulls out
 * WM_CHAR messages for processing. During testing we don't want to
 * mess with the real message queue. Instead we pass a
 * pseudo-WM_CHAR-message using this structure, and OnKeyDown will use
 * that as if it was in the message queue, and refrain from actually
 * looking at or touching the message queue.
 */
struct nsFakeCharMessage {
  UINT mCharCode;
  UINT mScanCode;
};

//-------------------------------------------------------------------------
//
//
//-------------------------------------------------------------------------
LRESULT nsWindow::OnKeyDown(const MSG &aMsg,
                            PRBool *aEventDispatched,
                            nsFakeCharMessage* aFakeCharMessage)
{
  UINT virtualKeyCode = aMsg.wParam;

#ifndef WINCE
  gKbdLayout.OnKeyDown (virtualKeyCode);
#endif

  // Use only DOMKeyCode for XP processing.
  // Use aVirtualKeyCode for gKbdLayout and native processing.
  UINT DOMKeyCode = sIMEIsComposing ?
                      virtualKeyCode : MapFromNativeToDOM(virtualKeyCode);

#ifdef DEBUG
  //printf("In OnKeyDown virt: %d\n", DOMKeyCode);
#endif

  PRBool noDefault =
    DispatchKeyEvent(NS_KEY_DOWN, 0, nsnull, DOMKeyCode, &aMsg);
  if (aEventDispatched)
    *aEventDispatched = PR_TRUE;

  // If we won't be getting a WM_CHAR, WM_SYSCHAR or WM_DEADCHAR, synthesize a keypress
  // for almost all keys
  switch (DOMKeyCode) {
    case NS_VK_SHIFT:
    case NS_VK_CONTROL:
    case NS_VK_ALT:
    case NS_VK_CAPS_LOCK:
    case NS_VK_NUM_LOCK:
    case NS_VK_SCROLL_LOCK: return noDefault;
  }

  PRUint32 extraFlags = (noDefault ? NS_EVENT_FLAG_NO_DEFAULT : 0);
  MSG msg;
  BOOL gotMsg = aFakeCharMessage ||
    ::PeekMessageW(&msg, mWnd, WM_KEYFIRST, WM_KEYLAST, PM_NOREMOVE | PM_NOYIELD);
  // Enter and backspace are always handled here to avoid for example the
  // confusion between ctrl-enter and ctrl-J.
  if (DOMKeyCode == NS_VK_RETURN || DOMKeyCode == NS_VK_BACK ||
      ((mIsControlDown || mIsAltDown)
#ifdef WINCE
       ))
#else
       && !gKbdLayout.IsDeadKey() && KeyboardLayout::IsPrintableCharKey(virtualKeyCode)))
#endif
  {
    // Remove a possible WM_CHAR or WM_SYSCHAR messages from the message queue.
    // They can be more than one because of:
    //  * Dead-keys not pairing with base character
    //  * Some keyboard layouts may map up to 4 characters to the single key
    PRBool anyCharMessagesRemoved = PR_FALSE;

    if (aFakeCharMessage) {
      anyCharMessagesRemoved = PR_TRUE;
    } else {
      while (gotMsg && (msg.message == WM_CHAR || msg.message == WM_SYSCHAR))
      {
        PR_LOG(sWindowsLog, PR_LOG_ALWAYS,
               ("%s charCode=%d scanCode=%d\n", msg.message == WM_SYSCHAR ? "WM_SYSCHAR" : "WM_CHAR",
                msg.wParam, HIWORD(msg.lParam) & 0xFF));
        RemoveMessageAndDispatchPluginEvent(WM_KEYFIRST, WM_KEYLAST);
        anyCharMessagesRemoved = PR_TRUE;

        gotMsg = ::PeekMessageW (&msg, mWnd, WM_KEYFIRST, WM_KEYLAST, PM_NOREMOVE | PM_NOYIELD);
      }
    }

    if (!anyCharMessagesRemoved && DOMKeyCode == NS_VK_BACK) {
      MSG imeStartCompositionMsg, imeCompositionMsg;
      if (::PeekMessageW(&imeStartCompositionMsg, mWnd, WM_IME_STARTCOMPOSITION, WM_IME_STARTCOMPOSITION, PM_NOREMOVE | PM_NOYIELD)
       && ::PeekMessageW(&imeCompositionMsg, mWnd, WM_IME_COMPOSITION, WM_IME_COMPOSITION, PM_NOREMOVE | PM_NOYIELD)
       && ::PeekMessageW(&msg, mWnd, WM_CHAR, WM_CHAR, PM_NOREMOVE | PM_NOYIELD)
       && imeStartCompositionMsg.wParam == 0x0 && imeStartCompositionMsg.lParam == 0x0
       && imeCompositionMsg.wParam == 0x0 && imeCompositionMsg.lParam == 0x1BF
       && msg.wParam == NS_VK_BACK && msg.lParam == 0x1
       && imeStartCompositionMsg.time <= imeCompositionMsg.time
       && imeCompositionMsg.time <= msg.time) {
        // This message pattern is "Kakutei-Undo" on ATOK and WXG.
        // (ATOK and WXG are popular IMEs in Japan)
        // In this case, the message queue has following messages:
        // ------------------------------------------------------------------------------------------
        // WM_KEYDOWN              * n (wParam = VK_BACK, lParam = 0x1)
        // WM_KEYUP                * 1 (wParam = VK_BACK, lParam = 0xC0000001) #this is ATOK only
        // WM_IME_STARTCOMPOSITION * 1 (wParam = 0x0, lParam = 0x0)
        // WM_IME_COMPOSITION      * 1 (wParam = 0x0, lParam = 0x1BF)
        // WM_CHAR                 * n (wParam = VK_BACK, lParam = 0x1)
        // WM_KEYUP                * 1 (wParam = VK_BACK, lParam = 0xC00E0001)
        // ------------------------------------------------------------------------------------------
        // This message pattern does not match to the above case;
        // i.e.,WM_KEYDOWN -> WM_CHAR -> WM_KEYDOWN -> WM_CHAR.
        // For more information of this problem:
        // http://bugzilla.mozilla.gr.jp/show_bug.cgi?id=2885 (written in Japanese)
        // http://bugzilla.mozilla.org/show_bug.cgi?id=194559 (written in English)

        NS_ASSERTION(!aFakeCharMessage, "We shouldn't be touching the real msg queue");
        RemoveMessageAndDispatchPluginEvent(WM_CHAR, WM_CHAR);
      }
    }
  }
  else if (gotMsg &&
           (aFakeCharMessage ||
            msg.message == WM_CHAR || msg.message == WM_SYSCHAR || msg.message == WM_DEADCHAR)) {
    if (aFakeCharMessage)
      return OnCharRaw(aFakeCharMessage->mCharCode,
                       aFakeCharMessage->mScanCode, extraFlags);

    // If prevent default set for keydown, do same for keypress
    ::GetMessageW(&msg, mWnd, msg.message, msg.message);

    if (msg.message == WM_DEADCHAR) {
      if (!PluginHasFocus())
        return PR_FALSE;

      // We need to send the removed message to focused plug-in.
      DispatchPluginEvent(msg);
      return noDefault;
    }

    PR_LOG(sWindowsLog, PR_LOG_ALWAYS,
           ("%s charCode=%d scanCode=%d\n",
            msg.message == WM_SYSCHAR ? "WM_SYSCHAR" : "WM_CHAR",
            msg.wParam, HIWORD(msg.lParam) & 0xFF));

    BOOL result = OnChar(msg, nsnull, extraFlags);
    // If a syschar keypress wasn't processed, Windows may want to 
    // handle it to activate a native menu.
    if (!result && msg.message == WM_SYSCHAR)
      ::DefWindowProcW(mWnd, msg.message, msg.wParam, msg.lParam);
    return result;
  }
#ifndef WINCE
  else if (!mIsControlDown && !mIsAltDown &&
             (KeyboardLayout::IsPrintableCharKey(virtualKeyCode) ||
              KeyboardLayout::IsNumpadKey(virtualKeyCode)))
  {
    // If this is simple KeyDown event but next message is not WM_CHAR,
    // this event may not input text, so we should ignore this event.
    // See bug 314130.
    return PluginHasFocus() && noDefault;
  }

  if (gKbdLayout.IsDeadKey ())
    return PluginHasFocus() && noDefault;

  PRUint8 shiftStates[5];
  PRUnichar uniChars[5];
  PRUnichar shiftedChars[5] = {0, 0, 0, 0, 0};
  PRUnichar unshiftedChars[5] = {0, 0, 0, 0, 0};
  PRUnichar shiftedLatinChar = 0;
  PRUnichar unshiftedLatinChar = 0;
  PRUint32 numOfUniChars = 0;
  PRUint32 numOfShiftedChars = 0;
  PRUint32 numOfUnshiftedChars = 0;
  PRUint32 numOfShiftStates = 0;

  switch (virtualKeyCode) {
    // keys to be sent as characters
    case VK_ADD:       uniChars [0] = '+';  numOfUniChars = 1;  break;
    case VK_SUBTRACT:  uniChars [0] = '-';  numOfUniChars = 1;  break;
    case VK_DIVIDE:    uniChars [0] = '/';  numOfUniChars = 1;  break;
    case VK_MULTIPLY:  uniChars [0] = '*';  numOfUniChars = 1;  break;
    case VK_NUMPAD0:
    case VK_NUMPAD1:
    case VK_NUMPAD2:
    case VK_NUMPAD3:
    case VK_NUMPAD4:
    case VK_NUMPAD5:
    case VK_NUMPAD6:
    case VK_NUMPAD7:
    case VK_NUMPAD8:
    case VK_NUMPAD9:
      uniChars [0] = virtualKeyCode - VK_NUMPAD0 + '0';
      numOfUniChars = 1;
      break;
    default:
      if (KeyboardLayout::IsPrintableCharKey(virtualKeyCode)) {
        numOfUniChars = numOfShiftStates =
          gKbdLayout.GetUniChars(uniChars, shiftStates,
                                 NS_ARRAY_LENGTH(uniChars));
      }

      if (mIsControlDown ^ mIsAltDown) {
        PRUint8 capsLockState = (::GetKeyState(VK_CAPITAL) & 1) ? eCapsLock : 0;
        numOfUnshiftedChars =
          gKbdLayout.GetUniCharsWithShiftState(virtualKeyCode, capsLockState,
                       unshiftedChars, NS_ARRAY_LENGTH(unshiftedChars));
        numOfShiftedChars =
          gKbdLayout.GetUniCharsWithShiftState(virtualKeyCode,
                       capsLockState | eShift,
                       shiftedChars, NS_ARRAY_LENGTH(shiftedChars));

        // The current keyboard cannot input alphabets or numerics,
        // we should append them for Shortcut/Access keys.
        // E.g., for Cyrillic keyboard layout.
        if (NS_VK_A <= DOMKeyCode && DOMKeyCode <= NS_VK_Z) {
          shiftedLatinChar = unshiftedLatinChar = DOMKeyCode;
          if (capsLockState)
            shiftedLatinChar += 0x20;
          else
            unshiftedLatinChar += 0x20;
          if (unshiftedLatinChar == unshiftedChars[0] &&
              shiftedLatinChar == shiftedChars[0]) {
              shiftedLatinChar = unshiftedLatinChar = 0;
          }
        } else {
          PRUint16 ch = 0;
          if (NS_VK_0 <= DOMKeyCode && DOMKeyCode <= NS_VK_9) {
            ch = DOMKeyCode;
          } else {
            switch (virtualKeyCode) {
              case VK_OEM_PLUS:   ch = '+'; break;
              case VK_OEM_MINUS:  ch = '-'; break;
            }
          }
          if (ch && unshiftedChars[0] != ch && shiftedChars[0] != ch) {
            // Windows has assigned a virtual key code to the key even though
            // the character can't be produced with this key.  That probably
            // means the character can't be produced with any key in the
            // current layout and so the assignment is based on a QWERTY
            // layout.  Append this code so that users can access the shortcut.
            unshiftedLatinChar = ch;
          }
        }

        // If the charCode is not ASCII character, we should replace the
        // charCode with ASCII character only when Ctrl is pressed.
        // But don't replace the charCode when the charCode is not same as
        // unmodified characters. In such case, Ctrl is sometimes used for a
        // part of character inputting key combination like Shift.
        if (mIsControlDown) {
          PRUint8 currentState = eCtrl;
          if (mIsShiftDown)
            currentState |= eShift;

          PRUint32 ch = mIsShiftDown ? shiftedLatinChar : unshiftedLatinChar;
          if (ch &&
              (numOfUniChars == 0 ||
               StringCaseInsensitiveEquals(uniChars, numOfUniChars,
                 mIsShiftDown ? shiftedChars : unshiftedChars,
                 mIsShiftDown ? numOfShiftedChars : numOfUnshiftedChars))) {
            numOfUniChars = numOfShiftStates = 1;
            uniChars[0] = ch;
            shiftStates[0] = currentState;
          }
        }
      }
  }

  if (numOfUniChars > 0 || numOfShiftedChars > 0 || numOfUnshiftedChars > 0) {
    PRUint32 num = PR_MAX(numOfUniChars,
                          PR_MAX(numOfShiftedChars, numOfUnshiftedChars));
    PRUint32 skipUniChars = num - numOfUniChars;
    PRUint32 skipShiftedChars = num - numOfShiftedChars;
    PRUint32 skipUnshiftedChars = num - numOfUnshiftedChars;
    UINT keyCode = numOfUniChars == 0 ? DOMKeyCode : 0;
    for (PRUint32 cnt = 0; cnt < num; cnt++) {
      PRUint16 uniChar, shiftedChar, unshiftedChar;
      uniChar = shiftedChar = unshiftedChar = 0;
      if (skipUniChars <= cnt) {
        if (cnt - skipUniChars  < numOfShiftStates) {
          // If key in combination with Alt and/or Ctrl produces a different
          // character than without them then do not report these flags
          // because it is separate keyboard layout shift state. If dead-key
          // and base character does not produce a valid composite character
          // then both produced dead-key character and following base
          // character may have different modifier flags, too.
          mIsShiftDown   = (shiftStates[cnt - skipUniChars] & eShift) != 0;
          mIsControlDown = (shiftStates[cnt - skipUniChars] & eCtrl) != 0;
          mIsAltDown     = (shiftStates[cnt - skipUniChars] & eAlt) != 0;
        }
        uniChar = uniChars[cnt - skipUniChars];
      }
      if (skipShiftedChars <= cnt)
        shiftedChar = shiftedChars[cnt - skipShiftedChars];
      if (skipUnshiftedChars <= cnt)
        unshiftedChar = unshiftedChars[cnt - skipUnshiftedChars];
      nsAutoTArray<nsAlternativeCharCode, 5> altArray;

      if (shiftedChar || unshiftedChar) {
        nsAlternativeCharCode chars(unshiftedChar, shiftedChar);
        altArray.AppendElement(chars);
      }
      if (cnt == num - 1 && (unshiftedLatinChar || shiftedLatinChar)) {
        nsAlternativeCharCode chars(unshiftedLatinChar, shiftedLatinChar);
        altArray.AppendElement(chars);
      }

      DispatchKeyEvent(NS_KEY_PRESS, uniChar, &altArray,
                       keyCode, nsnull, extraFlags);
    }
  } else
#endif
    DispatchKeyEvent(NS_KEY_PRESS, 0, nsnull, DOMKeyCode, nsnull, extraFlags);

  return noDefault;
}

//-------------------------------------------------------------------------
//
//
//-------------------------------------------------------------------------
LRESULT nsWindow::OnKeyUp(const MSG &aMsg, PRBool *aEventDispatched)
{
  UINT virtualKeyCode = aMsg.wParam;

  PR_LOG(sWindowsLog, PR_LOG_ALWAYS,
         ("nsWindow::OnKeyUp VK=%d\n", virtualKeyCode));

  virtualKeyCode =
    sIMEIsComposing ? virtualKeyCode : MapFromNativeToDOM(virtualKeyCode);
  if (aEventDispatched)
    *aEventDispatched = PR_TRUE;
  return DispatchKeyEvent(NS_KEY_UP, 0, nsnull, virtualKeyCode, &aMsg);
}

//-------------------------------------------------------------------------
//
//
//-------------------------------------------------------------------------
LRESULT nsWindow::OnChar(const MSG &aMsg, PRBool *aEventDispatched,
                         PRUint32 aFlags)
{
  return OnCharRaw(aMsg.wParam, HIWORD(aMsg.lParam) & 0xFF,
                   aFlags, &aMsg, aEventDispatched);
}

//-------------------------------------------------------------------------
//
//
//-------------------------------------------------------------------------
LRESULT nsWindow::OnCharRaw(UINT charCode, UINT aScanCode, PRUint32 aFlags,
                            const MSG *aMsg, PRBool *aEventDispatched)
{
  // ignore [shift+]alt+space so the OS can handle it
  if (mIsAltDown && !mIsControlDown && IS_VK_DOWN(NS_VK_SPACE)) {
    return FALSE;
  }
  
  // Ignore Ctrl+Enter (bug 318235)
  if (mIsControlDown && charCode == 0xA) {
    return FALSE;
  }

  // WM_CHAR with Control and Alt (== AltGr) down really means a normal character
  PRBool saveIsAltDown = mIsAltDown;
  PRBool saveIsControlDown = mIsControlDown;
  if (mIsAltDown && mIsControlDown)
    mIsAltDown = mIsControlDown = PR_FALSE;

  wchar_t uniChar;

  if (sIMEIsComposing) {
    HandleEndComposition();
  }

  if (mIsControlDown && charCode <= 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 = charCode - 1 + 'A';
    else
      uniChar = charCode - 1 + 'a';
    charCode = 0;
  }
  else if (mIsControlDown && charCode <= 0x1F) {
    // Fix for 50255 - <ctrl><[> and <ctrl><]> are not being processed.
    // also fixes ctrl+\ (x1c), ctrl+^ (x1e) and ctrl+_ (x1f)
    // for some reason the keypress handler need to have the uniChar code set
    // with the addition of a upper case A not the lower case.
    uniChar = charCode - 1 + 'A';
    charCode = 0;
  } else { // 0x20 - SPACE, 0x3D - EQUALS
    if (charCode < 0x20 || (charCode == 0x3D && mIsControlDown)) {
      uniChar = 0;
    } else {
      uniChar = charCode;
      charCode = 0;
    }
  }

  // Keep the characters unshifted for shortcuts and accesskeys and make sure
  // that numbers are always passed as such (among others: bugs 50255 and 351310)
  if (uniChar && (mIsControlDown || mIsAltDown)) {
    UINT virtualKeyCode = ::MapVirtualKeyEx(aScanCode, MAPVK_VSC_TO_VK,
                                            gKbdLayout.GetLayout());
    UINT unshiftedCharCode =
      virtualKeyCode >= '0' && virtualKeyCode <= '9' ? virtualKeyCode :
      mIsShiftDown ? ::MapVirtualKeyEx(virtualKeyCode, MAPVK_VK_TO_CHAR,
                                       gKbdLayout.GetLayout()) : 0;
    // ignore diacritics (top bit set) and key mapping errors (char code 0)
    if ((INT)unshiftedCharCode > 0)
      uniChar = unshiftedCharCode;
  }

  // Fix for bug 285161 (and 295095) which was caused by the initial fix for bug 178110.
  // When pressing (alt|ctrl)+char, the char must be lowercase unless shift is 
  // pressed too.
  if (!mIsShiftDown && (saveIsAltDown || saveIsControlDown)) {
    uniChar = towlower(uniChar);
  }

  PRBool result = DispatchKeyEvent(NS_KEY_PRESS, uniChar, nsnull,
                                   charCode, aMsg, aFlags);
  if (aEventDispatched)
    *aEventDispatched = PR_TRUE;
  mIsAltDown = saveIsAltDown;
  mIsControlDown = saveIsControlDown;
  return result;
}

static const PRUint32 sModifierKeyMap[][3] = {
  { nsIWidget::CAPS_LOCK, VK_CAPITAL, 0 },
  { nsIWidget::NUM_LOCK, VK_NUMLOCK, 0 },
  { nsIWidget::SHIFT_L, VK_SHIFT, VK_LSHIFT },
  { nsIWidget::SHIFT_R, VK_SHIFT, VK_RSHIFT },
  { nsIWidget::CTRL_L, VK_CONTROL, VK_LCONTROL },
  { nsIWidget::CTRL_R, VK_CONTROL, VK_RCONTROL },
  { nsIWidget::ALT_L, VK_MENU, VK_LMENU },
  { nsIWidget::ALT_R, VK_MENU, VK_RMENU }
};

struct KeyPair {
  PRUint8 mGeneral;
  PRUint8 mSpecific;
  KeyPair(PRUint32 aGeneral, PRUint32 aSpecific)
    : mGeneral(PRUint8(aGeneral)), mSpecific(PRUint8(aSpecific)) {}
};

static void
SetupKeyModifiersSequence(nsTArray<KeyPair>* aArray, PRUint32 aModifiers)
{
  for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(sModifierKeyMap); ++i) {
    const PRUint32* map = sModifierKeyMap[i];
    if (aModifiers & map[0]) {
      aArray->AppendElement(KeyPair(map[1], map[2]));
    }
  }
}

nsresult
nsWindow::SynthesizeNativeKeyEvent(PRInt32 aNativeKeyboardLayout,
                                   PRInt32 aNativeKeyCode,
                                   PRUint32 aModifierFlags,
                                   const nsAString& aCharacters,
                                   const nsAString& aUnmodifiedCharacters)
{
#ifndef WINCE  //Win CE doesn't support many of the calls used in this method, perhaps theres another way
  nsPrintfCString layoutName("%08x", aNativeKeyboardLayout);
  HKL loadedLayout = LoadKeyboardLayoutA(layoutName.get(), KLF_NOTELLSHELL);
  if (loadedLayout == NULL)
    return NS_ERROR_NOT_AVAILABLE;

  // Setup clean key state and load desired layout
  BYTE originalKbdState[256];
  ::GetKeyboardState(originalKbdState);
  BYTE kbdState[256];
  memset(kbdState, 0, sizeof(kbdState));
  // This changes the state of the keyboard for the current thread only,
  // and we'll restore it soon, so this should be OK.
  ::SetKeyboardState(kbdState);
  HKL oldLayout = gKbdLayout.GetLayout();
  gKbdLayout.LoadLayout(loadedLayout);

  nsAutoTArray<KeyPair,10> keySequence;
  SetupKeyModifiersSequence(&keySequence, aModifierFlags);
  NS_ASSERTION(aNativeKeyCode >= 0 && aNativeKeyCode < 256,
               "Native VK key code out of range");
  keySequence.AppendElement(KeyPair(aNativeKeyCode, 0));

  // Simulate the pressing of each modifier key and then the real key
  for (PRUint32 i = 0; i < keySequence.Length(); ++i) {
    PRUint8 key = keySequence[i].mGeneral;
    PRUint8 keySpecific = keySequence[i].mSpecific;
    kbdState[key] = 0x81; // key is down and toggled on if appropriate
    if (keySpecific) {
      kbdState[keySpecific] = 0x81;
    }
    ::SetKeyboardState(kbdState);
    SetupModKeyState();
    MSG msg = InitMSG(WM_KEYDOWN, key, 0);
    if (i == keySequence.Length() - 1 && aCharacters.Length() > 0) {
      UINT scanCode = ::MapVirtualKeyEx(aNativeKeyCode, MAPVK_VK_TO_VSC,
                                        gKbdLayout.GetLayout());
      nsFakeCharMessage fakeMsg = { aCharacters.CharAt(0), scanCode };
      OnKeyDown(msg, nsnull, &fakeMsg);
    } else {
      OnKeyDown(msg, nsnull, nsnull);
    }
  }
  for (PRUint32 i = keySequence.Length(); i > 0; --i) {
    PRUint8 key = keySequence[i - 1].mGeneral;
    PRUint8 keySpecific = keySequence[i - 1].mSpecific;
    kbdState[key] = 0; // key is up and toggled off if appropriate
    if (keySpecific) {
      kbdState[keySpecific] = 0;
    }
    ::SetKeyboardState(kbdState);
    SetupModKeyState();
    MSG msg = InitMSG(WM_KEYUP, key, 0);
    OnKeyUp(msg, nsnull);
  }  

  // Restore old key state and layout
  ::SetKeyboardState(originalKbdState);
  gKbdLayout.LoadLayout(oldLayout);
  SetupModKeyState();
  
  UnloadKeyboardLayout(loadedLayout);
  return NS_OK;
#else  //XXX: is there another way to do this?
  return NS_ERROR_NOT_IMPLEMENTED;
#endif  
}

void nsWindow::ConstrainZLevel(HWND *aAfter)
{
  nsZLevelEvent  event(PR_TRUE, NS_SETZLEVEL, this);
  nsWindow      *aboveWindow = 0;

  InitEvent(event);

  if (*aAfter == HWND_BOTTOM)
    event.mPlacement = nsWindowZBottom;
  else if (*aAfter == HWND_TOP || *aAfter == HWND_TOPMOST || *aAfter == HWND_NOTOPMOST)
    event.mPlacement = nsWindowZTop;
  else {
    event.mPlacement = nsWindowZRelative;
    aboveWindow = GetNSWindowPtr(*aAfter);
  }
  event.mReqBelow = aboveWindow;
  event.mActualBelow = nsnull;

  event.mImmediate = PR_FALSE;
  event.mAdjusted = PR_FALSE;
  DispatchWindowEvent(&event);

  if (event.mAdjusted) {
    if (event.mPlacement == nsWindowZBottom)
      *aAfter = HWND_BOTTOM;
    else if (event.mPlacement == nsWindowZTop)
      *aAfter = HWND_TOP;
    else {
      *aAfter = (HWND)event.mActualBelow->GetNativeData(NS_NATIVE_WINDOW);
    }
  }
  NS_IF_RELEASE(event.mActualBelow);
}

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

#ifdef NS_DEBUG

typedef struct {
  char * mStr;
  long   mId;
} EventMsgInfo;

EventMsgInfo gAllEvents[] = {
  {"WM_NULL",                             0x0000},
  {"WM_CREATE",                           0x0001},
  {"WM_DESTROY",                          0x0002},
  {"WM_MOVE",                             0x0003},
  {"WM_SIZE",                             0x0005},
  {"WM_ACTIVATE",                         0x0006},
  {"WM_SETFOCUS",                         0x0007},
  {"WM_KILLFOCUS",                        0x0008},
  {"WM_ENABLE",                           0x000A},
  {"WM_SETREDRAW",                        0x000B},
  {"WM_SETTEXT",                          0x000C},
  {"WM_GETTEXT",                          0x000D},
  {"WM_GETTEXTLENGTH",                    0x000E},
  {"WM_PAINT",                            0x000F},
  {"WM_CLOSE",                            0x0010},
  {"WM_QUERYENDSESSION",                  0x0011},
  {"WM_QUIT",                             0x0012},
  {"WM_QUERYOPEN",                        0x0013},
  {"WM_ERASEBKGND",                       0x0014},
  {"WM_SYSCOLORCHANGE",                   0x0015},
  {"WM_ENDSESSION",                       0x0016},
  {"WM_SHOWWINDOW",                       0x0018},
  {"WM_SETTINGCHANGE",                    0x001A},
  {"WM_DEVMODECHANGE",                    0x001B},
  {"WM_ACTIVATEAPP",                      0x001C},
  {"WM_FONTCHANGE",                       0x001D},
  {"WM_TIMECHANGE",                       0x001E},
  {"WM_CANCELMODE",                       0x001F},
  {"WM_SETCURSOR",                        0x0020},
  {"WM_MOUSEACTIVATE",                    0x0021},
  {"WM_CHILDACTIVATE",                    0x0022},
  {"WM_QUEUESYNC",                        0x0023},
  {"WM_GETMINMAXINFO",                    0x0024},
  {"WM_PAINTICON",                        0x0026},
  {"WM_ICONERASEBKGND",                   0x0027},
  {"WM_NEXTDLGCTL",                       0x0028},
  {"WM_SPOOLERSTATUS",                    0x002A},
  {"WM_DRAWITEM",                         0x002B},
  {"WM_MEASUREITEM",                      0x002C},
  {"WM_DELETEITEM",                       0x002D},
  {"WM_VKEYTOITEM",                       0x002E},
  {"WM_CHARTOITEM",                       0x002F},
  {"WM_SETFONT",                          0x0030},
  {"WM_GETFONT",                          0x0031},
  {"WM_SETHOTKEY",                        0x0032},
  {"WM_GETHOTKEY",                        0x0033},
  {"WM_QUERYDRAGICON",                    0x0037},
  {"WM_COMPAREITEM",                      0x0039},
  {"WM_GETOBJECT",                        0x003D},
  {"WM_COMPACTING",                       0x0041},
  {"WM_COMMNOTIFY",                       0x0044},
  {"WM_WINDOWPOSCHANGING",                0x0046},
  {"WM_WINDOWPOSCHANGED",                 0x0047},
  {"WM_POWER",                            0x0048},
  {"WM_COPYDATA",                         0x004A},
  {"WM_CANCELJOURNAL",                    0x004B},
  {"WM_NOTIFY",                           0x004E},
  {"WM_INPUTLANGCHANGEREQUEST",           0x0050},
  {"WM_INPUTLANGCHANGE",                  0x0051},
  {"WM_TCARD",                            0x0052},
  {"WM_HELP",                             0x0053},
  {"WM_USERCHANGED",                      0x0054},
  {"WM_NOTIFYFORMAT",                     0x0055},
  {"WM_CONTEXTMENU",                      0x007B},
  {"WM_STYLECHANGING",                    0x007C},
  {"WM_STYLECHANGED",                     0x007D},
  {"WM_DISPLAYCHANGE",                    0x007E},
  {"WM_GETICON",                          0x007F},
  {"WM_SETICON",                          0x0080},
  {"WM_NCCREATE",                         0x0081},
  {"WM_NCDESTROY",                        0x0082},
  {"WM_NCCALCSIZE",                       0x0083},
  {"WM_NCHITTEST",                        0x0084},
  {"WM_NCPAINT",                          0x0085},
  {"WM_NCACTIVATE",                       0x0086},
  {"WM_GETDLGCODE",                       0x0087},
  {"WM_SYNCPAINT",                        0x0088},
  {"WM_NCMOUSEMOVE",                      0x00A0},
  {"WM_NCLBUTTONDOWN",                    0x00A1},
  {"WM_NCLBUTTONUP",                      0x00A2},
  {"WM_NCLBUTTONDBLCLK",                  0x00A3},
  {"WM_NCRBUTTONDOWN",                    0x00A4},
  {"WM_NCRBUTTONUP",                      0x00A5},
  {"WM_NCRBUTTONDBLCLK",                  0x00A6},
  {"WM_NCMBUTTONDOWN",                    0x00A7},
  {"WM_NCMBUTTONUP",                      0x00A8},
  {"WM_NCMBUTTONDBLCLK",                  0x00A9},
  {"EM_GETSEL",                           0x00B0},
  {"EM_SETSEL",                           0x00B1},
  {"EM_GETRECT",                          0x00B2},
  {"EM_SETRECT",                          0x00B3},
  {"EM_SETRECTNP",                        0x00B4},
  {"EM_SCROLL",                           0x00B5},
  {"EM_LINESCROLL",                       0x00B6},
  {"EM_SCROLLCARET",                      0x00B7},
  {"EM_GETMODIFY",                        0x00B8},
  {"EM_SETMODIFY",                        0x00B9},
  {"EM_GETLINECOUNT",                     0x00BA},
  {"EM_LINEINDEX",                        0x00BB},
  {"EM_SETHANDLE",                        0x00BC},
  {"EM_GETHANDLE",                        0x00BD},
  {"EM_GETTHUMB",                         0x00BE},
  {"EM_LINELENGTH",                       0x00C1},
  {"EM_REPLACESEL",                       0x00C2},
  {"EM_GETLINE",                          0x00C4},
  {"EM_LIMITTEXT",                        0x00C5},
  {"EM_CANUNDO",                          0x00C6},
  {"EM_UNDO",                             0x00C7},
  {"EM_FMTLINES",                         0x00C8},
  {"EM_LINEFROMCHAR",                     0x00C9},
  {"EM_SETTABSTOPS",                      0x00CB},
  {"EM_SETPASSWORDCHAR",                  0x00CC},
  {"EM_EMPTYUNDOBUFFER",                  0x00CD},
  {"EM_GETFIRSTVISIBLELINE",              0x00CE},
  {"EM_SETREADONLY",                      0x00CF},
  {"EM_SETWORDBREAKPROC",                 0x00D0},
  {"EM_GETWORDBREAKPROC",                 0x00D1},
  {"EM_GETPASSWORDCHAR",                  0x00D2},
  {"EM_SETMARGINS",                       0x00D3},
  {"EM_GETMARGINS",                       0x00D4},
  {"EM_GETLIMITTEXT",                     0x00D5},
  {"EM_POSFROMCHAR",                      0x00D6},
  {"EM_CHARFROMPOS",                      0x00D7},
  {"EM_SETIMESTATUS",                     0x00D8},
  {"EM_GETIMESTATUS",                     0x00D9},
  {"SBM_SETPOS",                          0x00E0},
  {"SBM_GETPOS",                          0x00E1},
  {"SBM_SETRANGE",                        0x00E2},
  {"SBM_SETRANGEREDRAW",                  0x00E6},
  {"SBM_GETRANGE",                        0x00E3},
  {"SBM_ENABLE_ARROWS",                   0x00E4},
  {"SBM_SETSCROLLINFO",                   0x00E9},
  {"SBM_GETSCROLLINFO",                   0x00EA},
  {"WM_KEYDOWN",                          0x0100},
  {"WM_KEYUP",                            0x0101},
  {"WM_CHAR",                             0x0102},
  {"WM_DEADCHAR",                         0x0103},
  {"WM_SYSKEYDOWN",                       0x0104},
  {"WM_SYSKEYUP",                         0x0105},
  {"WM_SYSCHAR",                          0x0106},
  {"WM_SYSDEADCHAR",                      0x0107},
  {"WM_KEYLAST",                          0x0108},
  {"WM_IME_STARTCOMPOSITION",             0x010D},
  {"WM_IME_ENDCOMPOSITION",               0x010E},
  {"WM_IME_COMPOSITION",                  0x010F},
  {"WM_INITDIALOG",                       0x0110},
  {"WM_COMMAND",                          0x0111},
  {"WM_SYSCOMMAND",                       0x0112},
  {"WM_TIMER",                            0x0113},
  {"WM_HSCROLL",                          0x0114},
  {"WM_VSCROLL",                          0x0115},
  {"WM_INITMENU",                         0x0116},
  {"WM_INITMENUPOPUP",                    0x0117},
  {"WM_MENUSELECT",                       0x011F},
  {"WM_MENUCHAR",                         0x0120},
  {"WM_ENTERIDLE",                        0x0121},
  {"WM_MENURBUTTONUP",                    0x0122},
  {"WM_MENUDRAG",                         0x0123},
  {"WM_MENUGETOBJECT",                    0x0124},
  {"WM_UNINITMENUPOPUP",                  0x0125},
  {"WM_MENUCOMMAND",                      0x0126},
  {"WM_CTLCOLORMSGBOX",                   0x0132},
  {"WM_CTLCOLOREDIT",                     0x0133},
  {"WM_CTLCOLORLISTBOX",                  0x0134},
  {"WM_CTLCOLORBTN",                      0x0135},
  {"WM_CTLCOLORDLG",                      0x0136},
  {"WM_CTLCOLORSCROLLBAR",                0x0137},
  {"WM_CTLCOLORSTATIC",                   0x0138},
  {"CB_GETEDITSEL",                       0x0140},
  {"CB_LIMITTEXT",                        0x0141},
  {"CB_SETEDITSEL",                       0x0142},
  {"CB_ADDSTRING",                        0x0143},
  {"CB_DELETESTRING",                     0x0144},
  {"CB_DIR",                              0x0145},
  {"CB_GETCOUNT",                         0x0146},
  {"CB_GETCURSEL",                        0x0147},
  {"CB_GETLBTEXT",                        0x0148},
  {"CB_GETLBTEXTLEN",                     0x0149},
  {"CB_INSERTSTRING",                     0x014A},
  {"CB_RESETCONTENT",                     0x014B},
  {"CB_FINDSTRING",                       0x014C},
  {"CB_SELECTSTRING",                     0x014D},
  {"CB_SETCURSEL",                        0x014E},
  {"CB_SHOWDROPDOWN",                     0x014F},
  {"CB_GETITEMDATA",                      0x0150},
  {"CB_SETITEMDATA",                      0x0151},
  {"CB_GETDROPPEDCONTROLRECT",            0x0152},
  {"CB_SETITEMHEIGHT",                    0x0153},
  {"CB_GETITEMHEIGHT",                    0x0154},
  {"CB_SETEXTENDEDUI",                    0x0155},
  {"CB_GETEXTENDEDUI",                    0x0156},
  {"CB_GETDROPPEDSTATE",                  0x0157},
  {"CB_FINDSTRINGEXACT",                  0x0158},
  {"CB_SETLOCALE",                        0x0159},
  {"CB_GETLOCALE",                        0x015A},
  {"CB_GETTOPINDEX",                      0x015b},
  {"CB_SETTOPINDEX",                      0x015c},
  {"CB_GETHORIZONTALEXTENT",              0x015d},
  {"CB_SETHORIZONTALEXTENT",              0x015e},
  {"CB_GETDROPPEDWIDTH",                  0x015f},
  {"CB_SETDROPPEDWIDTH",                  0x0160},
  {"CB_INITSTORAGE",                      0x0161},
  {"CB_MSGMAX",                           0x0162},
  {"LB_ADDSTRING",                        0x0180},
  {"LB_INSERTSTRING",                     0x0181},
  {"LB_DELETESTRING",                     0x0182},
  {"LB_SELITEMRANGEEX",                   0x0183},
  {"LB_RESETCONTENT",                     0x0184},
  {"LB_SETSEL",                           0x0185},
  {"LB_SETCURSEL",                        0x0186},
  {"LB_GETSEL",                           0x0187},
  {"LB_GETCURSEL",                        0x0188},
  {"LB_GETTEXT",                          0x0189},
  {"LB_GETTEXTLEN",                       0x018A},
  {"LB_GETCOUNT",                         0x018B},
  {"LB_SELECTSTRING",                     0x018C},
  {"LB_DIR",                              0x018D},
  {"LB_GETTOPINDEX",                      0x018E},
  {"LB_FINDSTRING",                       0x018F},
  {"LB_GETSELCOUNT",                      0x0190},
  {"LB_GETSELITEMS",                      0x0191},
  {"LB_SETTABSTOPS",                      0x0192},
  {"LB_GETHORIZONTALEXTENT",              0x0193},
  {"LB_SETHORIZONTALEXTENT",              0x0194},
  {"LB_SETCOLUMNWIDTH",                   0x0195},
  {"LB_ADDFILE",                          0x0196},
  {"LB_SETTOPINDEX",                      0x0197},
  {"LB_GETITEMRECT",                      0x0198},
  {"LB_GETITEMDATA",                      0x0199},
  {"LB_SETITEMDATA",                      0x019A},
  {"LB_SELITEMRANGE",                     0x019B},
  {"LB_SETANCHORINDEX",                   0x019C},
  {"LB_GETANCHORINDEX",                   0x019D},
  {"LB_SETCARETINDEX",                    0x019E},
  {"LB_GETCARETINDEX",                    0x019F},
  {"LB_SETITEMHEIGHT",                    0x01A0},
  {"LB_GETITEMHEIGHT",                    0x01A1},
  {"LB_FINDSTRINGEXACT",                  0x01A2},
  {"LB_SETLOCALE",                        0x01A5},
  {"LB_GETLOCALE",                        0x01A6},
  {"LB_SETCOUNT",                         0x01A7},
  {"LB_INITSTORAGE",                      0x01A8},
  {"LB_ITEMFROMPOINT",                    0x01A9},
  {"LB_MSGMAX",                           0x01B0},
  {"WM_MOUSEMOVE",                        0x0200},
  {"WM_LBUTTONDOWN",                      0x0201},
  {"WM_LBUTTONUP",                        0x0202},
  {"WM_LBUTTONDBLCLK",                    0x0203},
  {"WM_RBUTTONDOWN",                      0x0204},
  {"WM_RBUTTONUP",                        0x0205},
  {"WM_RBUTTONDBLCLK",                    0x0206},
  {"WM_MBUTTONDOWN",                      0x0207},
  {"WM_MBUTTONUP",                        0x0208},
  {"WM_MBUTTONDBLCLK",                    0x0209},
  {"WM_MOUSEWHEEL",                       0x020A},
  {"WM_MOUSEHWHEEL",                      0x020E},
  {"WM_PARENTNOTIFY",                     0x0210},
  {"WM_ENTERMENULOOP",                    0x0211},
  {"WM_EXITMENULOOP",                     0x0212},
  {"WM_NEXTMENU",                         0x0213},
  {"WM_SIZING",                           0x0214},
  {"WM_CAPTURECHANGED",                   0x0215},
  {"WM_MOVING",                           0x0216},
  {"WM_POWERBROADCAST",                   0x0218},
  {"WM_DEVICECHANGE",                     0x0219},
  {"WM_MDICREATE",                        0x0220},
  {"WM_MDIDESTROY",                       0x0221},
  {"WM_MDIACTIVATE",                      0x0222},
  {"WM_MDIRESTORE",                       0x0223},
  {"WM_MDINEXT",                          0x0224},
  {"WM_MDIMAXIMIZE",                      0x0225},
  {"WM_MDITILE",                          0x0226},
  {"WM_MDICASCADE",                       0x0227},
  {"WM_MDIICONARRANGE",                   0x0228},
  {"WM_MDIGETACTIVE",                     0x0229},
  {"WM_MDISETMENU",                       0x0230},
  {"WM_ENTERSIZEMOVE",                    0x0231},
  {"WM_EXITSIZEMOVE",                     0x0232},
  {"WM_DROPFILES",                        0x0233},
  {"WM_MDIREFRESHMENU",                   0x0234},
  {"WM_IME_SETCONTEXT",                   0x0281},
  {"WM_IME_NOTIFY",                       0x0282},
  {"WM_IME_CONTROL",                      0x0283},
  {"WM_IME_COMPOSITIONFULL",              0x0284},
  {"WM_IME_SELECT",                       0x0285},
  {"WM_IME_CHAR",                         0x0286},
  {"WM_IME_REQUEST",                      0x0288},
  {"WM_IME_KEYDOWN",                      0x0290},
  {"WM_IME_KEYUP",                        0x0291},
  {"WM_NCMOUSEHOVER",                     0x02A0},
  {"WM_MOUSEHOVER",                       0x02A1},
  {"WM_MOUSELEAVE",                       0x02A3},
  {"WM_CUT",                              0x0300},
  {"WM_COPY",                             0x0301},
  {"WM_PASTE",                            0x0302},
  {"WM_CLEAR",                            0x0303},
  {"WM_UNDO",                             0x0304},
  {"WM_RENDERFORMAT",                     0x0305},
  {"WM_RENDERALLFORMATS",                 0x0306},
  {"WM_DESTROYCLIPBOARD",                 0x0307},
  {"WM_DRAWCLIPBOARD",                    0x0308},
  {"WM_PAINTCLIPBOARD",                   0x0309},
  {"WM_VSCROLLCLIPBOARD",                 0x030A},
  {"WM_SIZECLIPBOARD",                    0x030B},
  {"WM_ASKCBFORMATNAME",                  0x030C},
  {"WM_CHANGECBCHAIN",                    0x030D},
  {"WM_HSCROLLCLIPBOARD",                 0x030E},
  {"WM_QUERYNEWPALETTE",                  0x030F},
  {"WM_PALETTEISCHANGING",                0x0310},
  {"WM_PALETTECHANGED",                   0x0311},
  {"WM_HOTKEY",                           0x0312},
  {"WM_PRINT",                            0x0317},
  {"WM_PRINTCLIENT",                      0x0318},
  {"WM_THEMECHANGED",                     0x031A},
  {"WM_HANDHELDFIRST",                    0x0358},
  {"WM_HANDHELDLAST",                     0x035F},
  {"WM_AFXFIRST",                         0x0360},
  {"WM_AFXLAST",                          0x037F},
  {"WM_PENWINFIRST",                      0x0380},
  {"WM_PENWINLAST",                       0x038F},
  {"WM_APP",                              0x8000},
  {"WM_DWMCOMPOSITIONCHANGED",            0x031E},
  {"WM_DWMNCRENDERINGCHANGED",            0x031F},
  {"WM_DWMCOLORIZATIONCOLORCHANGED",      0x0320},
  {"WM_DWMWINDOWMAXIMIZEDCHANGE",         0x0321},
  {"WM_TABLET_QUERYSYSTEMGESTURESTATUS",  0x02CC},
  {"WM_GESTURE",                          0x0119},
  {"WM_GESTURENOTIFY",                    0x011A},
  {NULL, 0x0}
};


static long gEventCounter = 0;
static long gLastEventMsg = 0;

void PrintEvent(UINT msg, PRBool aShowAllEvents, PRBool aShowMouseMoves)
{
  int inx = 0;
  while (gAllEvents[inx].mId != (long)msg && gAllEvents[inx].mStr != NULL) {
    inx++;
  }
  if (aShowAllEvents || (!aShowAllEvents && gLastEventMsg != (long)msg)) {
    if (aShowMouseMoves || (!aShowMouseMoves && msg != 0x0020 && msg != 0x0200 && msg != 0x0084)) {
      printf("%6d - 0x%04X %s\n", gEventCounter++, msg, gAllEvents[inx].mStr ? gAllEvents[inx].mStr : "Unknown");
      gLastEventMsg = msg;
    }
  }
}

#endif

#define WM_XP_THEMECHANGED                 0x031A

// Static helper functions for heap dumping
static nsresult HeapDump(const char *filename, const char *heading)
{
#ifdef WINCE
  return NS_ERROR_NOT_IMPLEMENTED;
#else

  PRFileDesc *prfd = PR_Open(filename, PR_CREATE_FILE | PR_APPEND | PR_WRONLY, 0777);
  if (!prfd)
    return NS_ERROR_FAILURE;

  char buf[1024];
  PRUint32 n;
  PRUint32 written = 0;
  HANDLE heapHandle[64];
  DWORD nheap = GetProcessHeaps(64, heapHandle);
  if (nheap == 0 || nheap > 64) {
    return NS_ERROR_FAILURE;
  }

  n = PR_snprintf(buf, sizeof buf, "BEGIN HEAPDUMP : %s\n", heading);
  PR_Write(prfd, buf, n);
  for (DWORD i = 0; i < nheap; i++) {
    // Dump each heap
    PROCESS_HEAP_ENTRY ent = {0};
    n = PR_snprintf(buf, sizeof buf, "BEGIN heap %d : 0x%p\n", i+1, heapHandle[i]);
    PR_Write(prfd, buf, n);
    ent.lpData = NULL;
    while (HeapWalk(heapHandle[i], &ent)) {
      if (ent.wFlags & PROCESS_HEAP_REGION)
        n = PR_snprintf(buf, sizeof buf, "REGION %08p : overhead %d committed %d uncommitted %d firstblock %08p lastblock %08p\n",
                        ent.lpData, ent.cbOverhead,
                        ent.Region.dwCommittedSize, ent.Region.dwUnCommittedSize,
                        ent.Region.lpFirstBlock, ent.Region.lpLastBlock);
      else
        n = PR_snprintf(buf, sizeof buf, "%s %08p : %6d overhead %2d\n",
                        (ent.wFlags & PROCESS_HEAP_UNCOMMITTED_RANGE) ? "----" : ((ent.wFlags & PROCESS_HEAP_ENTRY_BUSY) ? "USED" : "FREE"),
                        ent.lpData, ent.cbData, ent.cbOverhead);
      PR_Write(prfd, buf, n);
    }
    n = PR_snprintf(buf, sizeof buf, "END heap %d : 0x%p\n", i+1, heapHandle[i]);
    PR_Write(prfd, buf, n);
  }
  n = PR_snprintf(buf, sizeof buf, "END HEAPDUMP : %s\n", heading);
  PR_Write(prfd, buf, n);

  PR_Close(prfd);
  return NS_OK;
#endif // WINCE
}

// Recursively dispatch synchronous paints for nsIWidget
// descendants with invalidated rectangles.

BOOL CALLBACK nsWindow::DispatchStarvedPaints(HWND aWnd, LPARAM aMsg)
{
  LONG_PTR proc = ::GetWindowLongPtrW(aWnd, GWLP_WNDPROC);
  if (proc == (LONG_PTR)&nsWindow::WindowProc) {
    // its one of our windows so check to see if it has a
    // invalidated rect. If it does. Dispatch a synchronous
    // paint.
    if (GetUpdateRect(aWnd, NULL, FALSE)) {
      VERIFY(::UpdateWindow(aWnd));
    }
  }
  return TRUE;
}

// Check for pending paints and dispatch any pending paint
// messages for any nsIWidget which is a descendant of the
// top-level window that *this* window is embedded within.
// 
// Note: We do not dispatch pending paint messages for non
// nsIWidget managed windows.

void nsWindow::DispatchPendingEvents()
{
  gLastInputEventTime = PR_IntervalToMicroseconds(PR_IntervalNow());

  // We need to ensure that reflow events do not get starved.
  // At the same time, we don't want to recurse through here
  // as that would prevent us from dispatching starved paints.
  static int recursionBlocker = 0;
  if (recursionBlocker++ == 0) {
    NS_ProcessPendingEvents(nsnull, PR_MillisecondsToInterval(100));
    --recursionBlocker;
  }

  // Quickly check to see if there are any
  // paint events pending.
  if (::GetQueueStatus(QS_PAINT)) {
    // Find the top level window.
    HWND topWnd = GetTopLevelHWND(mWnd);

    // Dispatch pending paints for all topWnd's descendant windows.
    // Note: EnumChildWindows enumerates all descendant windows not just
    // it's children.
    ::EnumChildWindows(topWnd, nsWindow::DispatchStarvedPaints, NULL);
  }
}

#ifndef WINCE
void nsWindow::PostSleepWakeNotification(const char* aNotification)
{
  nsCOMPtr<nsIObserverService> observerService = do_GetService("@mozilla.org/observer-service;1");
  if (observerService)
  {
    observerService->NotifyObservers(nsnull, aNotification, nsnull);
  }
}
#endif

void nsWindow::SetupModKeyState()
{
  mIsShiftDown   = IS_VK_DOWN(NS_VK_SHIFT);
  mIsControlDown = IS_VK_DOWN(NS_VK_CONTROL);
  mIsAltDown     = IS_VK_DOWN(NS_VK_ALT);
}

PRBool nsWindow::ProcessMessage(UINT msg, WPARAM wParam, LPARAM lParam, LRESULT *aRetValue)
{
  if (PluginHasFocus()) {
    PRBool callDefaultWndProc;
    MSG nativeMsg = InitMSG(msg, wParam, lParam);
    if (ProcessMessageForPlugin(nativeMsg, aRetValue, callDefaultWndProc))
      return !callDefaultWndProc;
  }

  static UINT vkKeyCached = 0;              // caches VK code fon WM_KEYDOWN
  PRBool result = PR_FALSE;                 // call the default nsWindow proc
  static PRBool getWheelInfo = PR_TRUE;
  *aRetValue = 0;
  PRBool isMozWindowTakingFocus = PR_TRUE;
  nsPaletteInfo palInfo;

  // Uncomment this to see all windows messages
  // first param shows all events
  // second param indicates whether to show mouse move events
  //PrintEvent(msg, PR_FALSE, PR_FALSE);

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

#ifndef WINCE
    // WM_QUERYENDSESSION must be handled by all windows.
    // Otherwise Windows thinks the window can just be killed at will.
    case WM_QUERYENDSESSION:
      if (sCanQuit == TRI_UNKNOWN)
      {
        // Ask if it's ok to quit, and store the answer until we
        // get WM_ENDSESSION signaling the round is complete.
        nsCOMPtr<nsIObserverService> obsServ =
          do_GetService("@mozilla.org/observer-service;1");
        nsCOMPtr<nsISupportsPRBool> cancelQuit =
          do_CreateInstance(NS_SUPPORTS_PRBOOL_CONTRACTID);
        cancelQuit->SetData(PR_FALSE);
        obsServ->NotifyObservers(cancelQuit, "quit-application-requested", nsnull);

        PRBool abortQuit;
        cancelQuit->GetData(&abortQuit);
        sCanQuit = abortQuit ? TRI_FALSE : TRI_TRUE;
      }
      *aRetValue = sCanQuit ? TRUE : FALSE;
      result = PR_TRUE;
      break;

    case WM_ENDSESSION:
      if (wParam == TRUE && sCanQuit == TRI_TRUE)
      {
        // Let's fake a shutdown sequence without actually closing windows etc.
        // to avoid Windows killing us in the middle. A proper shutdown would
        // require having a chance to pump some messages. Unfortunately
        // Windows won't let us do that. Bug 212316.
        nsCOMPtr<nsIObserverService> obsServ =
          do_GetService("@mozilla.org/observer-service;1");
        NS_NAMED_LITERAL_STRING(context, "shutdown-persist");
        obsServ->NotifyObservers(nsnull, "quit-application-granted", nsnull);
        obsServ->NotifyObservers(nsnull, "quit-application-forced", nsnull);
        obsServ->NotifyObservers(nsnull, "quit-application", nsnull);
        obsServ->NotifyObservers(nsnull, "profile-change-net-teardown", context.get());
        obsServ->NotifyObservers(nsnull, "profile-change-teardown", context.get());
        obsServ->NotifyObservers(nsnull, "profile-before-change", context.get());
        // Then a controlled but very quick exit.
        _exit(0);
      }
      sCanQuit = TRI_UNKNOWN;
      result = PR_TRUE;
      break;

    case WM_DISPLAYCHANGE:
      DispatchStandardEvent(NS_DISPLAYCHANGED);
      break;
#endif

    case WM_SYSCOLORCHANGE:
      // Note: This is sent for child windows as well as top-level windows.
      // The Win32 toolkit normally only sends these events to top-level windows.
      // But we cycle through all of the childwindows and send it to them as well
      // so all presentations get notified properly.
      // See nsWindow::GlobalMsgWindowProc.
      DispatchStandardEvent(NS_SYSCOLORCHANGED);
      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_XP_THEMECHANGED:
    {
      DispatchStandardEvent(NS_THEMECHANGED);

      // Invalidate the window so that the repaint will
      // pick up the new theme.
      Invalidate(PR_FALSE);
    }
    break;

    case WM_FONTCHANGE:
    {
      nsresult rv;
      PRBool didChange = PR_FALSE;

      // update the global font list
      nsCOMPtr<nsIFontEnumerator> fontEnum = do_GetService("@mozilla.org/gfx/fontenumerator;1", &rv);
      if (NS_SUCCEEDED(rv)) {
        fontEnum->UpdateFontList(&didChange);
        //didChange is TRUE only if new font langGroup is added to the list.
        if (didChange)  {
          // update device context font cache
          // Dirty but easiest way:
          // Changing nsIPrefBranch entry which triggers callbacks
          // and flows into calling mDeviceContext->FlushFontCache()
          // to update the font cache in all the instance of Browsers
          nsCOMPtr<nsIPrefService> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
          if (prefs) {
            nsCOMPtr<nsIPrefBranch> fiPrefs;
            prefs->GetBranch("font.internaluseonly.", getter_AddRefs(fiPrefs));
            if (fiPrefs) {
              PRBool fontInternalChange = PR_FALSE;
              fiPrefs->GetBoolPref("changed", &fontInternalChange);
              fiPrefs->SetBoolPref("changed", !fontInternalChange);
            }
          }
        }
      } //if (NS_SUCCEEDED(rv))
    }
    break;

#ifndef WINCE
    case WM_POWERBROADCAST:
      // only hidden window handle this
      // to prevent duplicate notification
      if (mWindowType == eWindowType_invisible) {
        switch (wParam)
        {
          case PBT_APMSUSPEND:
            PostSleepWakeNotification("sleep_notification");
            break;
          case PBT_APMRESUMEAUTOMATIC:
          case PBT_APMRESUMECRITICAL:
          case PBT_APMRESUMESUSPEND:
            PostSleepWakeNotification("wake_notification");
            break;
        }
      }
      break;
#endif

    case WM_MOVE: // Window moved
    {
      PRInt32 x = GET_X_LPARAM(lParam); // horizontal position in screen coordinates
      PRInt32 y = GET_Y_LPARAM(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:
      *aRetValue = (int) OnPaint();
      result = PR_TRUE;
      break;

#ifndef WINCE
    case WM_PRINTCLIENT:
      result = OnPaint((HDC) wParam);
      break;
#endif

#ifdef WINCE
      // This needs to move into nsIDOMKeyEvent.idl && nsGUIEvent.h
    case WM_HOTKEY:
    {
      // SmartPhones has a one or two menu buttons at the
      // bottom of the screen.  They are dispatched via a
      // menu resource, rather then a hotkey.  To make
      // this look consistent, we have mapped this menu to
      // fire hotkey events.  See
      // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/win_ce/html/pwc_TheBackButtonandOtherInterestingButtons.asp
      
      if (VK_TSOFT1 == HIWORD(lParam) && (0 != (MOD_KEYUP & LOWORD(lParam))))
      {
        keybd_event(VK_F19, 0, 0, 0);
        keybd_event(VK_F19, 0, KEYEVENTF_KEYUP, 0);
        result = 0;
        break;
      }
      
      if (VK_TSOFT2 == HIWORD(lParam) && (0 != (MOD_KEYUP & LOWORD(lParam))))
      {
        keybd_event(VK_F20, 0, 0, 0);
        keybd_event(VK_F20, 0, KEYEVENTF_KEYUP, 0);
        result = 0;
        break;
      }
      
      if (VK_TBACK == HIWORD(lParam) && (0 != (MOD_KEYUP & LOWORD(lParam))))
      {
        keybd_event(VK_BACK, 0, 0, 0);
        keybd_event(VK_BACK, 0, KEYEVENTF_KEYUP, 0);
        result = 0;
        break;
      }

      switch (wParam) 
      {
        case VK_APP1:
          keybd_event(VK_F1, 0, 0, 0);
          keybd_event(VK_F1, 0, KEYEVENTF_KEYUP, 0);
          result = 0;
          break;

        case VK_APP2:
          keybd_event(VK_F2, 0, 0, 0);
          keybd_event(VK_F2, 0, KEYEVENTF_KEYUP, 0);
          result = 0;
          break;

        case VK_APP3:
          keybd_event(VK_F3, 0, 0, 0);
          keybd_event(VK_F3, 0, KEYEVENTF_KEYUP, 0);
          result = 0;
          break;

        case VK_APP4:
          keybd_event(VK_F4, 0, 0, 0);
          keybd_event(VK_F4, 0, KEYEVENTF_KEYUP, 0);
          result = 0;
          break;

        case VK_APP5:
          keybd_event(VK_F5, 0, 0, 0);
          keybd_event(VK_F5, 0, KEYEVENTF_KEYUP, 0);
          result = 0;
          break;

        case VK_APP6:
          keybd_event(VK_F6, 0, 0, 0);
          keybd_event(VK_F6, 0, KEYEVENTF_KEYUP, 0);
          result = 0;
          break;
      }
    }
    break;
#endif

    case WM_SYSCHAR:
    case WM_CHAR:
    {
      MSG nativeMsg = InitMSG(msg, wParam, lParam);
      result = ProcessCharMessage(nativeMsg, nsnull);
      DispatchPendingEvents();
    }
    break;

    case WM_SYSKEYUP:
    case WM_KEYUP:
    {
      MSG nativeMsg = InitMSG(msg, wParam, lParam);
      result = ProcessKeyUpMessage(nativeMsg, nsnull);
      DispatchPendingEvents();
    }
    break;

    case WM_SYSKEYDOWN:
    case WM_KEYDOWN:
    {
      MSG nativeMsg = InitMSG(msg, wParam, lParam);
      result = ProcessKeyDownMessage(nativeMsg, nsnull);
      DispatchPendingEvents();
    }
    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_GETDLGCODE:
      *aRetValue = DLGC_WANTALLKEYS;
      result = PR_TRUE;
      break;

    case WM_MOUSEMOVE:
    {
      // Suppress dispatch of pending events
      // when mouse moves are generated by widget
      // creation instead of user input.
      LPARAM lParamScreen = lParamToScreen(lParam);
      POINT mp;
      mp.x      = GET_X_LPARAM(lParamScreen);
      mp.y      = GET_Y_LPARAM(lParamScreen);
      PRBool userMovedMouse = PR_FALSE;
      if ((gLastMouseMovePoint.x != mp.x) || (gLastMouseMovePoint.y != mp.y)) {
        userMovedMouse = PR_TRUE;
      }

      result = DispatchMouseEvent(NS_MOUSE_MOVE, wParam, lParam);
      if (userMovedMouse) {
        DispatchPendingEvents();
      }
    }
    break;

    case WM_LBUTTONDOWN:
      //SetFocus(); // this is bad
      //RelayMouseEvent(msg,wParam, lParam);
    {
      // check whether IME window do mouse operation
      if (IMEMouseHandling(IMEMOUSE_LDOWN, lParam))
        break;

      result = DispatchMouseEvent(NS_MOUSE_BUTTON_DOWN, wParam, lParam,
                                  PR_FALSE, nsMouseEvent::eLeftButton);
      DispatchPendingEvents();
    }
    break;

    case WM_LBUTTONUP:
      //RelayMouseEvent(msg,wParam, lParam);
      result = DispatchMouseEvent(NS_MOUSE_BUTTON_UP, wParam, lParam,
                                  PR_FALSE, nsMouseEvent::eLeftButton);
      DispatchPendingEvents();
      break;

#ifndef WINCE
    case WM_MOUSELEAVE:
    {
      // We need to check mouse button states and put them in for
      // wParam.
      WPARAM mouseState = (GetKeyState(VK_LBUTTON) ? MK_LBUTTON : 0)
        | (GetKeyState(VK_MBUTTON) ? MK_MBUTTON : 0)
        | (GetKeyState(VK_RBUTTON) ? MK_RBUTTON : 0);
      // Synthesize an event position because we don't get one from
      // WM_MOUSELEAVE.
      LPARAM pos = lParamToClient(::GetMessagePos());
      DispatchMouseEvent(NS_MOUSE_EXIT, mouseState, pos);
    }
    break;
#endif

    case WM_CONTEXTMENU:
    {
      // if the context menu is brought up from the keyboard, |lParam|
      // will be maxlong.
      LPARAM pos;
      PRBool contextMenukey = PR_FALSE;
      if (lParam == 0xFFFFFFFF)
      {
        contextMenukey = PR_TRUE;
        pos = lParamToClient(GetMessagePos());
      }
      else
      {
        pos = lParamToClient(lParam);
      }
      result = DispatchMouseEvent(NS_CONTEXTMENU, wParam, pos, contextMenukey,
                                  contextMenukey ?
                                    nsMouseEvent::eLeftButton :
                                    nsMouseEvent::eRightButton);
    }
    break;

    case WM_LBUTTONDBLCLK:
      result = DispatchMouseEvent(NS_MOUSE_DOUBLECLICK, wParam, lParam, PR_FALSE,
                                  nsMouseEvent::eLeftButton);
      break;

    case WM_MBUTTONDOWN:
    {
      // check whether IME window do mouse operation
      if (IMEMouseHandling(IMEMOUSE_MDOWN, lParam))
        break;
      result = DispatchMouseEvent(NS_MOUSE_BUTTON_DOWN, wParam, lParam, PR_FALSE,
                                  nsMouseEvent::eMiddleButton);
      DispatchPendingEvents();
    }
    break;

    case WM_MBUTTONUP:
      result = DispatchMouseEvent(NS_MOUSE_BUTTON_UP, wParam, lParam, PR_FALSE,
                                  nsMouseEvent::eMiddleButton);
      DispatchPendingEvents();
      break;

    case WM_MBUTTONDBLCLK:
      result = DispatchMouseEvent(NS_MOUSE_BUTTON_DOWN, wParam, lParam, PR_FALSE,
                                  nsMouseEvent::eMiddleButton);
      break;

    case WM_RBUTTONDOWN:
    {
      // check whether IME window do mouse operation
      if (IMEMouseHandling(IMEMOUSE_RDOWN, lParam))
        break;
      result = DispatchMouseEvent(NS_MOUSE_BUTTON_DOWN, wParam, lParam, PR_FALSE,
                                  nsMouseEvent::eRightButton);
      DispatchPendingEvents();
    }
    break;

    case WM_RBUTTONUP:
      result = DispatchMouseEvent(NS_MOUSE_BUTTON_UP, wParam, lParam, PR_FALSE,
                                  nsMouseEvent::eRightButton);
      DispatchPendingEvents();
      break;

    case WM_RBUTTONDBLCLK:
      result = DispatchMouseEvent(NS_MOUSE_DOUBLECLICK, wParam, lParam, PR_FALSE,
                                  nsMouseEvent::eRightButton);
      break;

    case WM_APPCOMMAND:
    {
      PRUint32 appCommand = GET_APPCOMMAND_LPARAM(lParam);

      switch (appCommand)
      {
        case APPCOMMAND_BROWSER_BACKWARD:
        case APPCOMMAND_BROWSER_FORWARD:
        case APPCOMMAND_BROWSER_REFRESH:
        case APPCOMMAND_BROWSER_STOP:
        case APPCOMMAND_BROWSER_SEARCH:
        case APPCOMMAND_BROWSER_FAVORITES:
        case APPCOMMAND_BROWSER_HOME:
          DispatchCommandEvent(appCommand);
          // tell the driver that we handled the event
          *aRetValue = 1;
          result = PR_TRUE;
          break;
      }
      // default = PR_FALSE - tell the driver that the event was not handled
    }
    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 = GetNSWindowPtr((HWND)lParam);

        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 the scrollbar to be drawn incorrectly
    case WM_CTLCOLORSTATIC:
      if (lParam) {
        nsWindow* control = GetNSWindowPtr((HWND)lParam);
          if (control) {
            control->SetUpForPaint((HDC)wParam);
            *aRetValue = (LPARAM)control->OnControlColor();
          }
      }

      result = PR_TRUE;
      break;

    case WM_ACTIVATE:
      if (mEventCallback) {
        PRInt32 fActive = LOWORD(wParam);

#if defined(WINCE_HAVE_SOFTKB)
        if (mIsTopWidgetWindow && gSoftKeyboardState)
          ToggleSoftKB(fActive);
#endif

        if (WA_INACTIVE == fActive) {
          gJustGotDeactivate = PR_TRUE;
#ifndef WINCE
          if (mIsTopWidgetWindow)
            mLastKeyboardLayout = gKbdLayout.GetLayout();
#endif

        } else {
          StopFlashing();

          gJustGotActivate = PR_TRUE;
          nsMouseEvent event(PR_TRUE, NS_MOUSE_ACTIVATE, this,
                             nsMouseEvent::eReal);
          InitEvent(event);

          event.acceptActivation = PR_TRUE;
  
          PRBool result = DispatchWindowEvent(&event);
#ifndef WINCE
          if (event.acceptActivation)
            *aRetValue = MA_ACTIVATE;
          else
            *aRetValue = MA_NOACTIVATE;

          if (gSwitchKeyboardLayout && mLastKeyboardLayout)
            ActivateKeyboardLayout(mLastKeyboardLayout, 0);
#else
          *aRetValue = 0;
#endif
        }
      }
      break;

#ifndef WINCE

    case WM_MOUSEACTIVATE:
      if (mWindowType == eWindowType_popup) {
        // a popup with a parent owner should not be activated when clicked
        // but should still allow the mouse event to be fired, so the return
        // value is set to MA_NOACTIVATE. But if the owner isn't the frontmost
        // window, just use default processing so that the window is activated.
        HWND owner = ::GetWindow(mWnd, GW_OWNER);
        if (owner && owner == ::GetForegroundWindow()) {
          *aRetValue = MA_NOACTIVATE;
          result = PR_TRUE;
        }
      }
      break;

    case WM_WINDOWPOSCHANGING:
    {
      LPWINDOWPOS info = (LPWINDOWPOS) lParam;
      // enforce local z-order rules
      if (!(info->flags & SWP_NOZORDER))
        ConstrainZLevel(&info->hwndInsertAfter);
      // prevent rude external programs from making hidden window visible
      if (mWindowType == eWindowType_invisible)
        info->flags &= ~SWP_SHOWWINDOW;
    }
    break;
#endif

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

#ifdef ACCESSIBILITY
      if (nsWindow::gIsAccessibilityOn) {
        // Create it for the first time so that it can start firing events
        nsCOMPtr<nsIAccessible> rootAccessible = GetRootAccessible();
      }
#endif

#if defined(WINCE_HAVE_SOFTKB)
      {
        // On Windows CE, we have a window that overlaps
        // the ISP button.  In this case, we should always
        // try to hide it when we are activated
      
        // Get current input context
        HIMC hC = ImmGetContext(mWnd);
        // Open the IME 
        ImmSetOpenStatus(hC, TRUE);
        ImmReleaseContext(mWnd, hC);
      }
#endif
      break;

    case WM_KILLFOCUS:
#if defined(WINCE_HAVE_SOFTKB)
      {
        HIMC hC = ImmGetContext(mWnd);
        ImmSetOpenStatus(hC, FALSE);
        ImmReleaseContext(mWnd, hC);
      }
#endif
      WCHAR className[kMaxClassNameLength];
      ::GetClassNameW((HWND)wParam, className, kMaxClassNameLength);
      if (wcscmp(className, kClassNameUI) &&
          wcscmp(className, kClassNameContent) &&
          wcscmp(className, kClassNameContentFrame) &&
          wcscmp(className, kClassNameDialog) &&
          wcscmp(className, kClassNameGeneral)) {
        isMozWindowTakingFocus = PR_FALSE;
      }
      if (gJustGotDeactivate) {
        gJustGotDeactivate = PR_FALSE;
        result = DispatchFocus(NS_DEACTIVATE, isMozWindowTakingFocus);
      }
      result = DispatchFocus(NS_LOSTFOCUS, isMozWindowTakingFocus);
      
      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);
        nsIntRect rect(wp->x, wp->y, newWidth, newHeight);

#ifdef MOZ_XUL
        if (eTransparencyTransparent == mTransparencyMode)
          ResizeTranslucentWindow(newWidth, newHeight);
#endif

        if (newWidth > mLastSize.width)
        {
          RECT drect;

          //getting wider
          drect.left = wp->x + mLastSize.width;
          drect.top = wp->y;
          drect.right = drect.left + (newWidth - mLastSize.width);
          drect.bottom = drect.top + newHeight;

          ::RedrawWindow(mWnd, &drect, NULL,
                         RDW_INVALIDATE | RDW_NOERASE | RDW_NOINTERNALPAINT | RDW_ERASENOW | RDW_ALLCHILDREN);
        }
        if (newHeight > mLastSize.height)
        {
          RECT drect;

          //getting taller
          drect.left = wp->x;
          drect.top = wp->y + mLastSize.height;
          drect.right = drect.left + newWidth;
          drect.bottom = drect.top + (newHeight - mLastSize.height);

          ::RedrawWindow(mWnd, &drect, NULL,
                         RDW_INVALIDATE | RDW_NOERASE | RDW_NOINTERNALPAINT | RDW_ERASENOW | RDW_ALLCHILDREN);
        }

        mBounds.width  = newWidth;
        mBounds.height = newHeight;
        mLastSize.width = newWidth;
        mLastSize.height = newHeight;
        ///nsRect rect(wp->x, wp->y, wp->cx, wp->cy);

        // If we're being minimized, don't send the resize event to Gecko because
        // it will cause the scrollbar in the content area to go away and we'll
        // forget the scroll position of the page.  Note that we need to check the
        // toplevel window, because child windows seem to go to 0x0 on minimize.
        HWND toplevelWnd = GetTopLevelHWND(mWnd);
        if ( !newWidth && !newHeight && IsIconic(toplevelWnd)) {
          result = PR_FALSE;
          break;
        }

        // 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);
      }

      /* handle size mode changes
         (the framechanged message seems a handy place to hook in,
         because it happens early enough (WM_SIZE is too late) and
         because in testing it seems an accurate harbinger of
         an impending min/max/restore change (WM_NCCALCSIZE would
         also work, but it's also sent when merely resizing.)) */
      if (wp->flags & SWP_FRAMECHANGED && ::IsWindowVisible(mWnd)) {
        nsSizeModeEvent event(PR_TRUE, NS_SIZEMODE, this);
#ifndef WINCE
        WINDOWPLACEMENT pl;
        pl.length = sizeof(pl);
        ::GetWindowPlacement(mWnd, &pl);

        if (pl.showCmd == SW_SHOWMAXIMIZED)
          event.mSizeMode = nsSizeMode_Maximized;
        else if (pl.showCmd == SW_SHOWMINIMIZED)
          event.mSizeMode = nsSizeMode_Minimized;
        else
          event.mSizeMode = nsSizeMode_Normal;
#else
        event.mSizeMode = nsSizeMode_Normal;
#endif
        InitEvent(event);

        result = DispatchWindowEvent(&event);

#ifndef WINCE
        if (pl.showCmd == SW_SHOWMINIMIZED) {
          // Deactivate
          WCHAR className[kMaxClassNameLength];
          ::GetClassNameW((HWND)wParam, className, kMaxClassNameLength);
          if (wcscmp(className, kClassNameUI) &&
              wcscmp(className, kClassNameContent) &&
              wcscmp(className, kClassNameContentFrame) &&
              wcscmp(className, kClassNameDialog) &&
              wcscmp(className, kClassNameGeneral)) {
            isMozWindowTakingFocus = PR_FALSE;
          }
          gJustGotDeactivate = PR_FALSE;
          result = DispatchFocus(NS_DEACTIVATE, isMozWindowTakingFocus);
        } else if (pl.showCmd == SW_SHOWNORMAL && !(wp->flags & SWP_NOACTIVATE)){
          // Make sure we're active
          result = DispatchFocus(NS_GOTFOCUS, PR_TRUE);
          result = DispatchFocus(NS_ACTIVATE, PR_TRUE);
        }
#else
        result = DispatchFocus(NS_GOTFOCUS, PR_TRUE);
        result = DispatchFocus(NS_ACTIVATE, PR_TRUE);
#endif
      }
    }
    break;

    case WM_SETTINGCHANGE:
        getWheelInfo = PR_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, TRUE);

        // Realize the drawing palette
        int i = ::RealizePalette(hDC);

#ifdef DEBUG
        //printf("number of colors that changed=%d\n",i);
#endif
        // we should always invalidate.. because the lookup may have changed
        ::InvalidateRect(mWnd, (LPRECT)NULL, TRUE);

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

#ifndef WINCE
    case WM_INPUTLANGCHANGEREQUEST:
      *aRetValue = TRUE;
      result = PR_FALSE;
      break;

    case WM_INPUTLANGCHANGE:
      result = OnInputLangChange((HKL)lParam);
      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:
      // We receive double byte char code. No need to worry about the <Shift>
      mIsShiftDown = PR_FALSE;
      result = OnIMEChar((wchar_t)wParam, lParam);
      break;

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

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

      break;

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

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

    case WM_DROPFILES:
    {
#if 0
      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);
#ifdef DEBUG
        printf("szFileName [%s]\n", szFileName);
#endif  // DEBUG
        nsAutoString fileStr(szFileName);
        nsEventStatus status;
        nsDragDropEvent event(NS_DRAGDROP_EVENT, this);
        InitEvent(event);
        event.mType      = nsDragDropEventStatus_eDrop;
        event.mIsFileURL = PR_FALSE;
        event.mURL       = fileStr.get();
        DispatchEvent(&event, status);
      }
#endif // 0
    }
    break;
#endif // WINCE

    case WM_DESTROYCLIPBOARD:
    {
      nsIClipboard* clipboard;
      nsresult rv = CallGetService(kCClipboardCID, &clipboard);
      clipboard->EmptyClipboard(nsIClipboard::kGlobalClipboard);
      NS_RELEASE(clipboard);
    }
    break;

#ifdef ACCESSIBILITY
    case WM_GETOBJECT:
    {
      *aRetValue = 0;
      if (lParam == OBJID_CLIENT) { // oleacc.dll will be loaded dynamically
        nsCOMPtr<nsIAccessible> rootAccessible = GetRootAccessible(); // Held by a11y cache
        if (rootAccessible) {
          IAccessible *msaaAccessible = NULL;
          rootAccessible->GetNativeInterface((void**)&msaaAccessible); // does an addref
          if (msaaAccessible) {
            *aRetValue = LresultFromObject(IID_IAccessible, wParam, msaaAccessible); // does an addref
            msaaAccessible->Release(); // release extra addref
            result = PR_TRUE;  // We handled the WM_GETOBJECT message
          }
        }
      }
    }
#endif

#ifndef WINCE
    case WM_SYSCOMMAND:
      // prevent Windows from trimming the working set. bug 76831
      if (!gTrimOnMinimize && wParam == SC_MINIMIZE) {
        ::ShowWindow(mWnd, SW_SHOWMINIMIZED);
        result = PR_TRUE;
      }
      break;
#endif


#ifdef WINCE
  case WM_HIBERNATE:        
    nsMemory::HeapMinimize(PR_TRUE);
    break;
#endif
    default:
    {
      // Handle both flavors of mouse wheel events.
#ifndef WINCE
      if (msg == WM_MOUSEWHEEL || msg == WM_MOUSEHWHEEL) {
        static int iDeltaPerLine, iDeltaPerChar;
        static ULONG ulScrollLines, ulScrollChars = 1;
        static int currentVDelta, currentHDelta;
        static HWND currentWindow = 0;

        PRBool isVertical = msg == WM_MOUSEWHEEL;

        // Get mouse wheel metrics (but only once).
        if (getWheelInfo) {
          getWheelInfo = PR_FALSE;

          SystemParametersInfo (SPI_GETWHEELSCROLLLINES, 0, &ulScrollLines, 0);

          // ulScrollLines usually equals 3 or 0 (for no scrolling)
          // WHEEL_DELTA equals 120, so iDeltaPerLine will be 40.

          // However, if ulScrollLines > WHEEL_DELTA, we assume that
          // the mouse driver wants a page scroll.  The docs state that
          // ulScrollLines should explicitly equal WHEEL_PAGESCROLL, but
          // since some mouse drivers use an arbitrary large number instead,
          // we have to handle that as well.

          iDeltaPerLine = 0;
          if (ulScrollLines) {
            if (ulScrollLines <= WHEEL_DELTA) {
              iDeltaPerLine = WHEEL_DELTA / ulScrollLines;
            } else {
              ulScrollLines = WHEEL_PAGESCROLL;
            }
          }

          if (!SystemParametersInfo(SPI_GETWHEELSCROLLCHARS, 0,
                                    &ulScrollChars, 0)) {
            // Note that we may always fail to get the value before Win Vista.
            ulScrollChars = 1;
          }

          iDeltaPerChar = 0;
          if (ulScrollChars) {
            if (ulScrollChars <= WHEEL_DELTA) {
              iDeltaPerChar = WHEEL_DELTA / ulScrollChars;
            } else {
              ulScrollChars = WHEEL_PAGESCROLL;
            }
          }
        }

        if ((isVertical  && ulScrollLines != WHEEL_PAGESCROLL && !iDeltaPerLine) ||
            (!isVertical && ulScrollChars != WHEEL_PAGESCROLL && !iDeltaPerChar))
          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 = GET_X_LPARAM(lParam);
        point.y = GET_Y_LPARAM(lParam);
        HWND destWnd = ::WindowFromPoint(point);

        // Since we receive mousewheel events for as long as
        // we are focused, it's entirely possible that there
        // is another app's window or no window under the
        // pointer.

        if (!destWnd) {
          // No window is under the pointer
          break;
        }

        // We don't care about windows belonging to other processes.
        DWORD processId = 0;
        GetWindowThreadProcessId(destWnd, &processId);
        if (processId != GetCurrentProcessId())
        {
          // Somebody elses window
          break;
        }

        nsWindow* destWindow = GetNSWindowPtr(destWnd);
        if (!destWindow || destWindow->mIsPluginWindow) {
          // Some other app, or a plugin window.
          // Windows directs WM_MOUSEWHEEL to the focused window.
          // However, Mozilla does not like plugins having focus, so a
          // Mozilla window (ie, the plugin's parent (us!) has focus.)
          // Therefore, plugins etc _should_ get first grab at the
          // message, but this focus vaguary means the plugin misses
          // out. If the window is a child of ours, forward it on.
          // Determine if a child by walking the parent list until
          // we find a parent matching our wndproc.
          HWND parentWnd = ::GetParent(destWnd);
          while (parentWnd) {
            nsWindow* parentWindow = GetNSWindowPtr(parentWnd);
            if (parentWindow) {
              // We have a child window - quite possibly a plugin window.
              // However, not all plugins are created equal - some will handle this message themselves,
              // some will forward directly back to us, while others will call DefWndProc, which
              // itself still forwards back to us.
              // So if we have sent it once, we need to handle it ourself.
              if (mIsInMouseWheelProcessing) {
                destWnd = parentWnd;
                destWindow = parentWindow;
              } else {
                // First time we have seen this message.
                // Call the child - either it will consume it, or
                // it will wind it's way back to us, triggering the destWnd case above.
                // either way, when the call returns, we are all done with the message,
                mIsInMouseWheelProcessing = PR_TRUE;
                if (0 == ::SendMessageW(destWnd, msg, wParam, lParam)) {
                  result = PR_TRUE; // consumed - don't call DefWndProc
                }
                destWnd = nsnull;
                mIsInMouseWheelProcessing = PR_FALSE;
              }
              break; // stop parent search
            }
            parentWnd = ::GetParent(parentWnd);
          } // while parentWnd
        }
        if (destWnd == nsnull)
          break; // done with this message.
        if (destWnd != mWnd) {
          if (destWindow) {
            return destWindow->ProcessMessage(msg, wParam, lParam, aRetValue);
          }
#ifdef DEBUG
          else
            printf("WARNING: couldn't get child window for MW event\n");
#endif
        }

        // We should cancel the surplus delta if the current window is not
        // same as previous.
        if (currentWindow != mWnd) {
          currentVDelta = 0;
          currentHDelta = 0;
          currentWindow = mWnd;
        }

        nsMouseScrollEvent scrollEvent(PR_TRUE, NS_MOUSE_SCROLL, this);
        scrollEvent.delta = 0;
        if (isVertical) {
          scrollEvent.scrollFlags = nsMouseScrollEvent::kIsVertical;
          if (ulScrollLines == WHEEL_PAGESCROLL) {
            scrollEvent.scrollFlags |= nsMouseScrollEvent::kIsFullPage;
            scrollEvent.delta = (((short) HIWORD (wParam)) > 0) ? -1 : 1;
          } else {
            currentVDelta -= (short) HIWORD (wParam);
            if (PR_ABS(currentVDelta) >= iDeltaPerLine) {
              scrollEvent.delta = currentVDelta / iDeltaPerLine;
              currentVDelta %= iDeltaPerLine;
            }
          }
        } else {
          scrollEvent.scrollFlags = nsMouseScrollEvent::kIsHorizontal;
          if (ulScrollChars == WHEEL_PAGESCROLL) {
            scrollEvent.scrollFlags |= nsMouseScrollEvent::kIsFullPage;
            scrollEvent.delta = (((short) HIWORD (wParam)) > 0) ? 1 : -1;
          } else {
            currentHDelta += (short) HIWORD (wParam);
            if (PR_ABS(currentHDelta) >= iDeltaPerChar) {
              scrollEvent.delta = currentHDelta / iDeltaPerChar;
              currentHDelta %= iDeltaPerChar;
            }
          }
        }

        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);
        if (nsnull != mEventCallback) {
          result = DispatchWindowEvent(&scrollEvent);
        }
        // Note that we should return zero if we process WM_MOUSEWHEEL.
        // But if we process WM_MOUSEHWHEEL, we should return non-zero.
        if (result)
          *aRetValue = isVertical ? 0 : TRUE;
      } // msg == WM_MOUSEWHEEL || msg == WM_MOUSEHWHEEL

      else if (msg == nsWindow::uWM_HEAP_DUMP) {
        // XXX for now we use c:\heapdump.txt until we figure out how to
        // XXX pass in message parameters.
        HeapDump("c:\\heapdump.txt", "whatever");
        result = PR_TRUE;
      }
#endif // WINCE

#ifdef NS_ENABLE_TSF
      else if (msg == WM_USER_TSF_TEXTCHANGE) {
        nsTextStore::OnTextChangeMsg();
      }
#endif //NS_ENABLE_TSF

    }
    break;
#ifndef WINCE
  case WM_DWMCOMPOSITIONCHANGED:
    BroadcastMsg(mWnd, WM_DWMCOMPOSITIONCHANGED);
    DispatchStandardEvent(NS_THEMECHANGED);
    if (nsUXThemeData::CheckForCompositor() && mTransparencyMode == eTransparencyGlass) {
      MARGINS margins = { -1, -1, -1, -1 };
      nsUXThemeData::dwmExtendFrameIntoClientAreaPtr(mWnd, &margins);
    }
    Invalidate(PR_FALSE);
    break;
#endif

    /* Gesture support events */

    case WM_TABLET_QUERYSYSTEMGESTURESTATUS:
      // According to MS samples, this must be handled to enable
      // rotational support in multi-touch drivers.
      result = PR_TRUE;
      *aRetValue = TABLET_ROTATE_GESTURE_ENABLE;
      break;
    
    case WM_GESTURE:
      result = ProcessGestureMessage(wParam, lParam);
      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;
  }
}

PRBool nsWindow::ProcessGestureMessage(WPARAM wParam, LPARAM lParam)
{
  // Treatment for pan events which translate into scroll events:
  if (mGesture.IsPanEvent(lParam)) {
    nsMouseScrollEvent event(PR_TRUE, NS_MOUSE_PIXEL_SCROLL, this);

    if ( !mGesture.ProcessPanMessage(mWnd, wParam, lParam) )
      return PR_FALSE; // ignore

    nsEventStatus status;

    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.button    = 0;
    event.time      = ::GetMessageTime();

    if (mGesture.PanDeltaToPixelScrollX(event)) {
      DispatchEvent(&event, status);
    }
    if (mGesture.PanDeltaToPixelScrollY(event)) {
      DispatchEvent(&event, status);
    }

    mGesture.CloseGestureInfoHandle((HGESTUREINFO)lParam);

    return PR_TRUE;
  }

  // Other gestures translate into simple gesture events:
  nsSimpleGestureEvent event(PR_TRUE, 0, this, 0, 0.0);
  if ( !mGesture.ProcessGestureMessage(mWnd, wParam, lParam, event) ) {
    return PR_FALSE; // fall through to DefWndProc
  }
  
  // Polish up and send off the new event
  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.button    = 0;
  event.time      = ::GetMessageTime();

  nsEventStatus status;
  DispatchEvent(&event, status);
  if (status == nsEventStatus_eIgnore) {
    return PR_FALSE; // Ignored, fall through
  }

  // Only close this if we process and return true.
  mGesture.CloseGestureInfoHandle((HGESTUREINFO)lParam);

  return PR_TRUE; // Handled
}

LRESULT nsWindow::ProcessCharMessage(const MSG &aMsg, PRBool *aEventDispatched)
{
  NS_PRECONDITION(aMsg.message == WM_CHAR || aMsg.message == WM_SYSCHAR,
                  "message is not keydown event");
  PR_LOG(sWindowsLog, PR_LOG_ALWAYS,
         ("%s charCode=%d scanCode=%d\n",
         aMsg.message == WM_SYSCHAR ? "WM_SYSCHAR" : "WM_CHAR",
         aMsg.wParam, HIWORD(aMsg.lParam) & 0xFF));

  // These must be checked here too as a lone WM_CHAR could be received
  // if a child window didn't handle it (for example Alt+Space in a content window)
  SetupModKeyState();

  return OnChar(aMsg, aEventDispatched);
}

LRESULT nsWindow::ProcessKeyUpMessage(const MSG &aMsg, PRBool *aEventDispatched)
{
  NS_PRECONDITION(aMsg.message == WM_KEYUP || aMsg.message == WM_SYSKEYUP,
                  "message is not keydown event");
  PR_LOG(sWindowsLog, PR_LOG_ALWAYS,
         ("%s VK=%d\n", aMsg.message == WM_SYSKEYDOWN ?
                          "WM_SYSKEYUP" : "WM_KEYUP", aMsg.wParam));

  SetupModKeyState();

  // Note: the original code passed (HIWORD(lParam)) to OnKeyUp as
  // scan code. However, this breaks Alt+Num pad input.
  // http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/toascii.asp
  // states 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.

  // ignore [shift+]alt+space so the OS can handle it
  if (mIsAltDown && !mIsControlDown && IS_VK_DOWN(NS_VK_SPACE))
    return FALSE;

  if (!sIMEIsComposing && (aMsg.message != WM_KEYUP || aMsg.message != VK_MENU)) {
    // Ignore VK_MENU if it's not a system key release, so that the menu bar does not trigger
    // This helps avoid triggering the menu bar for ALT key accelerators used in
    // assistive technologies such as Window-Eyes and ZoomText, and when using Alt+Tab
    // to switch back to Mozilla in Windows 95 and Windows 98
    return OnKeyUp(aMsg, aEventDispatched);
  }

  return 0;
}

LRESULT nsWindow::ProcessKeyDownMessage(const MSG &aMsg,
                                        PRBool *aEventDispatched)
{
  PR_LOG(sWindowsLog, PR_LOG_ALWAYS,
         ("%s VK=%d\n", aMsg.message == WM_SYSKEYDOWN ?
                          "WM_SYSKEYDOWN" : "WM_KEYDOWN", aMsg.wParam));
  NS_PRECONDITION(aMsg.message == WM_KEYDOWN || aMsg.message == WM_SYSKEYDOWN,
                  "message is not keydown event");

  SetupModKeyState();

  // Note: the original code passed (HIWORD(lParam)) to OnKeyDown as
  // scan code. However, this breaks Alt+Num pad input.
  // http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/toascii.asp
  // states 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.

  // ignore [shift+]alt+space so the OS can handle it
  if (mIsAltDown && !mIsControlDown && IS_VK_DOWN(NS_VK_SPACE))
    return FALSE;

  LRESULT result = 0;
  if (mIsAltDown && sIMEIsStatusChanged) {
    sIMEIsStatusChanged = PR_FALSE;
  } else if (!sIMEIsComposing) {
    result = OnKeyDown(aMsg, aEventDispatched, nsnull);
  }

#ifndef WINCE
  if (aMsg.wParam == VK_MENU || (aMsg.wParam == VK_F10 && !mIsShiftDown)) {
    // We need to let Windows handle this keypress,
    // by returning PR_FALSE, if there's a native menu
    // bar somewhere in our containing window hierarchy.
    // Otherwise we handle the keypress and don't pass
    // it on to Windows, by returning PR_TRUE.
    PRBool hasNativeMenu = PR_FALSE;
    HWND hWnd = mWnd;
    while (hWnd) {
      if (::GetMenu(hWnd)) {
        hasNativeMenu = PR_TRUE;
        break;
      }
      hWnd = ::GetParent(hWnd);
    }
    result = !hasNativeMenu;
  }
#endif

  return result;
}

PRBool
nsWindow::ProcessMessageForPlugin(const MSG &aMsg,
                                  LRESULT *aResult,
                                  PRBool &aCallDefWndProc)
{
  NS_PRECONDITION(aResult, "aResult must be non-null.");
  *aResult = 0;

  aCallDefWndProc = PR_FALSE;
  PRBool fallBackToNonPluginProcess = PR_FALSE;
  PRBool eventDispatched = PR_FALSE;
  switch (aMsg.message) {
    case WM_INPUTLANGCHANGEREQUEST:
    case WM_INPUTLANGCHANGE:
      DispatchPluginEvent(aMsg);
      return PR_FALSE; // go to non-plug-ins processing

    case WM_CHAR:
    case WM_SYSCHAR:
      *aResult = ProcessCharMessage(aMsg, &eventDispatched);
      break;

    case WM_KEYUP:
    case WM_SYSKEYUP:
      *aResult = ProcessKeyUpMessage(aMsg, &eventDispatched);
      break;

    case WM_KEYDOWN:
    case WM_SYSKEYDOWN:
      *aResult = ProcessKeyDownMessage(aMsg, &eventDispatched);
      break;

    case WM_IME_COMPOSITION:
      // We should end composition if there is a committed string.
      if (aMsg.lParam & GCS_RESULTSTR)
        sIMEIsComposing = PR_FALSE;
      // Continue composition if there is still a string being composed.
      if (IS_COMPOSING_LPARAM(aMsg.lParam))
        sIMEIsComposing = PR_TRUE;
      break;

    case WM_IME_STARTCOMPOSITION:
      sIMEIsComposing = PR_TRUE;
      break;

    case WM_IME_ENDCOMPOSITION:
      sIMEIsComposing = PR_FALSE;
      break;

    case WM_DEADCHAR:
    case WM_SYSDEADCHAR:
    case WM_CONTEXTMENU:

    case WM_CUT:
    case WM_COPY:
    case WM_PASTE:
    case WM_CLEAR:
    case WM_UNDO:

    case WM_IME_CHAR:
    case WM_IME_COMPOSITIONFULL:
    case WM_IME_CONTROL:
    case WM_IME_KEYDOWN:
    case WM_IME_KEYUP:
    case WM_IME_NOTIFY:
    case WM_IME_REQUEST:
    case WM_IME_SELECT:
    case WM_IME_SETCONTEXT:
      break;

    default:
      return PR_FALSE;
  }

  if (!eventDispatched)
    aCallDefWndProc = !DispatchPluginEvent(aMsg);
  DispatchPendingEvents();
  return PR_TRUE;
}

PRBool nsWindow::DispatchPluginEvent(const MSG &aMsg)
{
  if (!PluginHasFocus())
    return PR_FALSE;

  nsGUIEvent event(PR_TRUE, NS_PLUGIN_EVENT, this);
  nsIntPoint point(0, 0);
  InitEvent(event, &point);
  nsPluginEvent pluginEvent;
  pluginEvent.event = aMsg.message;
  pluginEvent.wParam = aMsg.wParam;
  pluginEvent.lParam = aMsg.lParam;
  event.nativeMsg = (void *)&pluginEvent;
  return DispatchWindowEvent(&event);
}

//-------------------------------------------------------------------------
//
// return the window class name and initialize the class if needed
//
//-------------------------------------------------------------------------

#define CS_XP_DROPSHADOW       0x00020000

LPCWSTR nsWindow::WindowClass()
{
  if (!nsWindow::sIsRegistered) {
    WNDCLASSW wc;

//    wc.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
    wc.style         = CS_DBLCLKS;
    wc.lpfnWndProc   = ::DefWindowProcW;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance     = nsToolkit::mDllInstance;
    wc.hIcon         = ::LoadIconW(::GetModuleHandleW(NULL), (LPWSTR)IDI_APPLICATION);
    wc.hCursor       = NULL;
    wc.hbrBackground = mBrush;
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = kClassNameHidden;

    BOOL succeeded = ::RegisterClassW(&wc) != 0 && 
      ERROR_CLASS_ALREADY_EXISTS != GetLastError();
    nsWindow::sIsRegistered = succeeded;

    wc.lpszClassName = kClassNameContentFrame;
    if (!::RegisterClassW(&wc) && 
      ERROR_CLASS_ALREADY_EXISTS != GetLastError()) {
      nsWindow::sIsRegistered = FALSE;
    }

    wc.lpszClassName = kClassNameContent;
    if (!::RegisterClassW(&wc) && 
      ERROR_CLASS_ALREADY_EXISTS != GetLastError()) {
      nsWindow::sIsRegistered = FALSE;
    }

    wc.lpszClassName = kClassNameUI;
    if (!::RegisterClassW(&wc) && 
      ERROR_CLASS_ALREADY_EXISTS != GetLastError()) {
      nsWindow::sIsRegistered = FALSE;
    }

    wc.lpszClassName = kClassNameGeneral;
    ATOM generalClassAtom = ::RegisterClassW(&wc);
    if (!generalClassAtom && 
      ERROR_CLASS_ALREADY_EXISTS != GetLastError()) {
      nsWindow::sIsRegistered = FALSE;
    }

    wc.lpszClassName = kClassNameDialog;
    wc.hIcon = 0;
    if (!::RegisterClassW(&wc) && 
      ERROR_CLASS_ALREADY_EXISTS != GetLastError()) {
      nsWindow::sIsRegistered = FALSE;
    }
  }

  if (mWindowType == eWindowType_invisible) {
    return kClassNameHidden;
  }
  if (mWindowType == eWindowType_dialog) {
    return kClassNameDialog;
  }
  if (mContentType == eContentTypeContent) {
    return kClassNameContent;
  }
  if (mContentType == eContentTypeContentFrame) {
    return kClassNameContentFrame;
  }
  if (mContentType == eContentTypeUI) {
    return kClassNameUI;
  }
  return kClassNameGeneral;
}

LPCWSTR nsWindow::WindowPopupClass()
{
  const LPCWSTR className = L"MozillaDropShadowWindowClass";

  if (!nsWindow::sIsPopupClassRegistered) {
    WNDCLASSW wc;

    wc.style = CS_DBLCLKS | CS_XP_DROPSHADOW;
    wc.lpfnWndProc   = ::DefWindowProcW;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance     = nsToolkit::mDllInstance;
    wc.hIcon         = ::LoadIconW(::GetModuleHandleW(NULL), (LPWSTR)IDI_APPLICATION);
    wc.hCursor       = NULL;
    wc.hbrBackground = mBrush;
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = className;

    nsWindow::sIsPopupClassRegistered = ::RegisterClassW(&wc);
    if (!nsWindow::sIsPopupClassRegistered) {
      // For older versions of Win32 (i.e., not XP), the registration will
      // fail, so we have to re-register without the CS_XP_DROPSHADOW flag.
      wc.style = CS_DBLCLKS;
      nsWindow::sIsPopupClassRegistered = ::RegisterClassW(&wc);
    }
  }

  return className;
}

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

  /* On Windows Mobile, we want very simple window styles; this is
   * just optimizing for full-screen apps that don't want any
   * titlebar/etc.  UI.  We should probably allow apps some
   * finer-grained control over these types at some point, but for now
   * this will work fine.  If we're on Windows CE, we probably have a
   * full window manager, so we make dialog/toplevel windows be real
   * windows.  In addition, we do the post-processing on the style
   * (e.g. disabling the thick resize window if we don't have resize
   * handles specified in the style).
   */
  /* Note: On Windows CE (and presumably Mobile), WS_OVERLAPPED provides
   * space for a menu bar in the window, which we don't want; it shouldn't
   * be used. */
#if defined(WINCE)
  /* on CE, WS_OVERLAPPED == WS_BORDER | WS_CAPTION, so don't use OVERLAPPED, just set the
   * separate bits directly for clarity */
  switch (mWindowType) {
    case eWindowType_child:
      style = WS_CHILD;
      break;

    case eWindowType_dialog:
      style = WS_BORDER | WS_POPUP;
#if !defined(WINCE_WINDOWS_MOBILE)
      style |= WS_SYSMENU;
      if (mBorderStyle != eBorderStyle_default)
        style |= WS_CAPTION | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
#endif
      break;

    case eWindowType_popup:
      style = WS_POPUP | WS_BORDER;
      break;

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

    case eWindowType_toplevel:
    case eWindowType_invisible:
      style = WS_BORDER;
#if !defined(WINCE_WINDOWS_MOBILE)
      style |= WS_THICKFRAME | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
#endif
      break;
  }
#else
  switch (mWindowType) {
    case eWindowType_child:
      style = WS_OVERLAPPED;
      break;

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

    case eWindowType_popup:
      style = WS_POPUP;
      if (mTransparencyMode == eTransparencyGlass) {
        /* Glass seems to need WS_CAPTION or WS_THICKFRAME to work.
           WS_THICKFRAME has issues with autohiding popups but looks better */
        style |= WS_THICKFRAME;
      } else {
        style |= WS_OVERLAPPED;
      }
      break;

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

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

#ifndef WINCE_WINDOWS_MOBILE
  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;
      style &= ~WS_CHILD;
    }

    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;
  }
#endif // WINCE
  VERIFY_WINDOW_STYLE(style);
  return style;
}


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

    case eWindowType_dialog:
      return WS_EX_WINDOWEDGE | WS_EX_DLGMODALFRAME;

    case eWindowType_popup:
      return
#if defined(WINCE) && !defined(WINCE_WINDOWS_MOBILE)
        WS_EX_NOACTIVATE |
#endif
        WS_EX_TOPMOST | WS_EX_TOOLWINDOW;

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

    case eWindowType_toplevel:
    case eWindowType_invisible:
      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
      if (mUnicodeWidget)
        mPrevWndProc = (WNDPROC)::SetWindowLongPtrW(mWnd, GWLP_WNDPROC,
                                                (LONG_PTR)nsWindow::WindowProc);
      else
        mPrevWndProc = (WNDPROC)::SetWindowLongPtrA(mWnd, GWLP_WNDPROC,
                                                (LONG_PTR)nsWindow::WindowProc);
      NS_ASSERTION(mPrevWndProc, "Null standard window procedure");
      // connect the this pointer to the nsWindow handle
      SetNSWindowPtr(mWnd, this);
    }
    else {
      if (mUnicodeWidget)
        ::SetWindowLongPtrW(mWnd, GWLP_WNDPROC, (LONG_PTR)mPrevWndProc);
      else
        ::SetWindowLongPtrA(mWnd, GWLP_WNDPROC, (LONG_PTR)mPrevWndProc);
      SetNSWindowPtr(mWnd, NULL);
      mPrevWndProc = NULL;
    }
  }
}


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

  SubclassWindow(FALSE);

  // We have to destroy the native drag target before we null out our
  // window pointer
  EnableDragDrop(PR_FALSE);

  mWnd = NULL;

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

#if 0
  if (mPalette) {
    VERIFY(::DeleteObject(mPalette));
    mPalette = NULL;
  }
#endif

  // 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)
{
  mBounds.x = aX;
  mBounds.y = aY;

  nsGUIEvent event(PR_TRUE, NS_MOVE, this);
  InitEvent(event);
  event.refPoint.x = aX;
  event.refPoint.y = aY;

  return DispatchWindowEvent(&event);
}

static NS_DEFINE_CID(kRegionCID, NS_REGION_CID);

static void
AddRECTToRegion(const RECT& aRect, nsIRegion* aRegion)
{
  aRegion->Union(aRect.left, aRect.top, aRect.right - aRect.left, aRect.bottom - aRect.top);
}

static already_AddRefed<nsIRegion>
ConvertHRGNToRegion(HRGN aRgn)
{
  NS_ASSERTION(aRgn, "Don't pass NULL region here");

  nsCOMPtr<nsIRegion> region = do_CreateInstance(kRegionCID);
  if (!region)
    return nsnull;

  region->Init();

  DWORD size = ::GetRegionData(aRgn, 0, NULL);
  nsAutoTArray<PRUint8,100> buffer;
  if (!buffer.SetLength(size))
    return region.forget();

  RGNDATA* data = reinterpret_cast<RGNDATA*>(buffer.Elements());
  if (!::GetRegionData(aRgn, size, data))
    return region.forget();

  if (data->rdh.nCount > MAX_RECTS_IN_REGION) {
    AddRECTToRegion(data->rdh.rcBound, region);
    return region.forget();
  }

  RECT* rects = reinterpret_cast<RECT*>(data->Buffer);
  for (PRUint32 i = 0; i < data->rdh.nCount; ++i) {
    RECT* r = rects + i;
    AddRECTToRegion(*r, region);
  }

  return region.forget();
}

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

#ifdef MOZ_XUL
  if (!aDC && (eTransparencyTransparent == mTransparencyMode))
  {
    // For layered translucent windows all drawing should go to memory DC and no
    // WM_PAINT messages are normally generated. To support asynchronous painting
    // we force generation of WM_PAINT messages by invalidating window areas with
    // RedrawWindow, InvalidateRect or InvalidateRgn function calls.
    // BeginPaint/EndPaint must be called to make Windows think that invalid area
    // is painted. Otherwise it will continue sending the same message endlessly.
    ::BeginPaint(mWnd, &ps);
    ::EndPaint(mWnd, &ps);

    aDC = mMemoryDC;
  }
#endif

  mPainting = PR_TRUE;

#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 = aDC ? aDC : (::BeginPaint(mWnd, &ps));
  mPaintDC = hDC;
  HRGN paintRgn = NULL;

#ifdef MOZ_XUL
  if (aDC || (eTransparencyTransparent == mTransparencyMode)) {
#else
  if (aDC) {
#endif

    RECT paintRect;
    ::GetClientRect(mWnd, &paintRect);
    paintRgn = ::CreateRectRgn(paintRect.left, paintRect.top, paintRect.right, paintRect.bottom);
  }
  else {
#ifndef WINCE
    paintRgn = ::CreateRectRgn(0, 0, 0, 0);
    if (paintRgn != NULL) {
      int result = GetRandomRgn(hDC, paintRgn, SYSRGN);
      if (result == 1) {
        POINT pt = {0,0};
        ::MapWindowPoints(NULL, mWnd, &pt, 1);
        ::OffsetRgn(paintRgn, pt.x, pt.y);
      }
    }
#else
    paintRgn = ::CreateRectRgn(ps.rcPaint.left, ps.rcPaint.top, 
                               ps.rcPaint.right, ps.rcPaint.bottom);
#endif
  }

  nsCOMPtr<nsIRegion> paintRgnWin;
  if (paintRgn) {
    paintRgnWin = ConvertHRGNToRegion(paintRgn);
    ::DeleteObject(paintRgn);
  }

  if (paintRgnWin && !paintRgnWin->IsEmpty()) {
    // call the event callback
    if (mEventCallback)
    {
      nsPaintEvent event(PR_TRUE, NS_PAINT, this);

      InitEvent(event);

      event.region = paintRgnWin;
      event.rect = nsnull;
 
      // Should probably pass in a real region here, using GetRandomRgn
      // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/clipping_4q0e.asp

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

#if defined(MOZ_XUL) && !defined(PAINT_USE_IMAGE_SURFACE)
      nsRefPtr<gfxASurface> targetSurface;
      if (eTransparencyTransparent == mTransparencyMode) {
        if (mTransparentSurface == nsnull)
          SetupTranslucentWindowMemoryBitmap(mTransparencyMode);
        targetSurface = mTransparentSurface;
      } else {
        targetSurface = new gfxWindowsSurface(hDC);
      }
#elif defined(PAINT_USE_IMAGE_SURFACE)
      if (!gSharedSurfaceData) {
        gSharedSurfaceSize.height = GetSystemMetrics(SM_CYSCREEN);
        gSharedSurfaceSize.width = GetSystemMetrics(SM_CXSCREEN);
        gSharedSurfaceData = (PRUint8*) malloc(gSharedSurfaceSize.width * gSharedSurfaceSize.height * 4);
      }

      gfxIntSize surfaceSize(ps.rcPaint.right - ps.rcPaint.left,
                             ps.rcPaint.bottom - ps.rcPaint.top);

      nsRefPtr<gfxImageSurface> targetSurface;

      if (!gSharedSurfaceData ||
          surfaceSize.width > gSharedSurfaceSize.width ||
          surfaceSize.height > gSharedSurfaceSize.height)
      {
#ifdef DEBUG_vladimir
          RETAILMSG(1, (L"OnPaint: Paint area bigger than screen! Screen %dx%d, surface %dx%d, HWND %p\r\n", gSharedSurfaceSize.width, gSharedSurfaceSize.height, surfaceSize.width, surfaceSize.height, mWnd));
#endif

          // allocate a new oversize surface; hopefully this will just be a one-time thing,
          // and we should really fix whatever's doing it!
          targetSurface = new gfxImageSurface(surfaceSize, gfxASurface::ImageFormatRGB24);
      } else {
          // don't use the shared surface directly; instead, create a new one
          // that just reuses its buffer.
          targetSurface = new gfxImageSurface(gSharedSurfaceData.get(),
                                              surfaceSize,
                                              surfaceSize.width * 4,
                                              gfxASurface::ImageFormatRGB24);
      }

      if (targetSurface && !targetSurface->CairoStatus()) {
        targetSurface->SetDeviceOffset(gfxPoint(-ps.rcPaint.left, -ps.rcPaint.top));
      }
#else
      nsRefPtr<gfxASurface> targetSurface = new gfxWindowsSurface(hDC);
#endif

      nsRefPtr<gfxContext> thebesContext = new gfxContext(targetSurface);
      thebesContext->SetFlag(gfxContext::FLAG_DESTINED_FOR_SCREEN);

      // don't need to double buffer with PAINT_USE_IMAGE_SURFACE;
      // it's implicitly double buffered
#if !defined(PAINT_USE_IMAGE_SURFACE)
# if defined(MOZ_XUL)
      if (eTransparencyGlass == mTransparencyMode && nsUXThemeData::sHaveCompositor) {
        thebesContext->PushGroup(gfxASurface::CONTENT_COLOR_ALPHA);
      } else if (eTransparencyTransparent == mTransparencyMode) {
        // If we're rendering with translucency, we're going to be
        // rendering the whole window; make sure we clear it first
        thebesContext->SetOperator(gfxContext::OPERATOR_CLEAR);
        thebesContext->Paint();
        thebesContext->SetOperator(gfxContext::OPERATOR_OVER);
      } else {
        // If we're not doing translucency, then double buffer
        thebesContext->PushGroup(gfxASurface::CONTENT_COLOR);
      }
# else
      // If we're not doing translucency, then double buffer
      thebesContext->PushGroup(gfxASurface::CONTENT_COLOR);
# endif
#endif

      nsCOMPtr<nsIRenderingContext> rc;
      nsresult rv = mContext->CreateRenderingContextInstance (*getter_AddRefs(rc));
      if (NS_FAILED(rv)) {
        NS_WARNING("CreateRenderingContextInstance failed");
        return PR_FALSE;
      }

      rv = rc->Init(mContext, thebesContext);
      if (NS_FAILED(rv)) {
        NS_WARNING("RC::Init failed");
        return PR_FALSE;
      }

      event.renderingContext = rc;
      result = DispatchWindowEvent(&event, eventStatus);
      event.renderingContext = nsnull;

#ifdef MOZ_XUL
      if (eTransparencyTransparent == mTransparencyMode) {
        // Data from offscreen drawing surface was copied to memory bitmap of transparent
        // bitmap. Now it can be read from memory bitmap to apply alpha channel and after
        // that displayed on the screen.
        UpdateTranslucentWindow();
      } else
#endif
      if (result) {
#ifndef PAINT_USE_IMAGE_SURFACE
        // Only update if DispatchWindowEvent returned TRUE; otherwise, nothing handled
        // this, and we'll just end up painting with black.
        thebesContext->PopGroupToSource();
        thebesContext->SetOperator(gfxContext::OPERATOR_SOURCE);
        thebesContext->Paint();
#else
        // Just blit this directly
        BITMAPINFOHEADER bi;
        memset(&bi, 0, sizeof(BITMAPINFOHEADER));
        bi.biSize = sizeof(BITMAPINFOHEADER);
        bi.biWidth = surfaceSize.width;
        bi.biHeight = - surfaceSize.height;
        bi.biPlanes = 1;
        bi.biBitCount = 32;
        bi.biCompression = BI_RGB;

#ifdef PAINT_USE_IMAGE_SURFACE_24BPP
        // On Windows CE/Windows Mobile, 24bpp packed-pixel sources
        // seem to be far faster to blit than 32bpp (see bug 484864).
        // So, convert the bits to 24bpp by stripping out the unused
        // alpha byte.  24bpp DIBs also have scanlines that are 4-byte
        // aligned though, so that must be taken into account.
        int srcstride = surfaceSize.width*4;
        int dststride = surfaceSize.width*3;
        dststride = (dststride + 3) & ~3;

        // Convert in place
        for (int j = 0; j < surfaceSize.height; ++j) {
          unsigned int *src = (unsigned int*) (targetSurface->Data() + j*srcstride);
          unsigned int *dst = (unsigned int*) (targetSurface->Data() + j*dststride);

          // go 4 pixels at a time, since each 4 pixels
          // turns into 3 DWORDs when converted into BGR:
          // BGRx BGRx BGRx BGRx -> BGRB GRBG RBGR
          //
          // However, since we're dealing with little-endian ints, this is actually:
          // xRGB xrgb xRGB xrgb -> bRGB GBrg rgbR
          int width_left = surfaceSize.width;
          while (width_left >= 4) {
            unsigned int a = *src++;
            unsigned int b = *src++;
            unsigned int c = *src++;
            unsigned int d = *src++;

            *dst++ =  (a & 0x00ffffff)        | (b << 24);
            *dst++ = ((b & 0x00ffff00) >> 8)  | (c << 16);
            *dst++ = ((c & 0x00ff0000) >> 16) | (d << 8);

            width_left -= 4;
          }

          // then finish up whatever number of pixels are left,
          // using bytes.
          unsigned char *bsrc = (unsigned char*) src;
          unsigned char *bdst = (unsigned char*) dst;
          switch (width_left) {
          case 3:
            *bdst++ = *bsrc++;
            *bdst++ = *bsrc++;
            *bdst++ = *bsrc++;
            bsrc++;
          case 2:
            *bdst++ = *bsrc++;
            *bdst++ = *bsrc++;
            *bdst++ = *bsrc++;
            bsrc++;
          case 1:
            *bdst++ = *bsrc++;
            *bdst++ = *bsrc++;
            *bdst++ = *bsrc++;
            bsrc++;
          case 0:
            break;
          }
        }

        bi.biBitCount = 24;
#endif

        StretchDIBits(hDC,
                      ps.rcPaint.left, ps.rcPaint.top,
                      surfaceSize.width, surfaceSize.height,
                      0, 0,
                      surfaceSize.width, surfaceSize.height,
                      targetSurface->Data(),
                      (BITMAPINFO*) &bi,
                      DIB_RGB_COLORS,
                      SRCCOPY);
#endif
      }
    }
  }

  if (!aDC) {
    ::EndPaint(mWnd, &ps);
  }

  mPaintDC = nsnull;

#if defined(NS_DEBUG) && !defined(WINCE)
  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);
      PR_Sleep(PR_MillisecondsToInterval(30));
      ::InvertRgn(debugPaintFlashDC, debugPaintFlashRegion);
      PR_Sleep(PR_MillisecondsToInterval(30));
    }
    ::ReleaseDC(mWnd, debugPaintFlashDC);
    ::DeleteObject(debugPaintFlashRegion);
  }
#endif // NS_DEBUG && !WINCE

  mPainting = PR_FALSE;

  return result;
}


//-------------------------------------------------------------------------
//
// Send a resize message to the listener
//
//-------------------------------------------------------------------------
PRBool nsWindow::OnResize(nsIntRect &aWindowRect)
{
  // call the event callback
  if (mEventCallback) {
    nsSizeEvent event(PR_TRUE, NS_SIZE, this);
    InitEvent(event);
    event.windowSize = &aWindowRect;
    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;
    }
    return DispatchWindowEvent(&event);
  }

  return PR_FALSE;
}

static PRBool IsTopLevelMouseExit(HWND aWnd)
{
  DWORD pos = ::GetMessagePos();
  POINT mp;
  mp.x = GET_X_LPARAM(pos);
  mp.y = GET_Y_LPARAM(pos);
  HWND mouseWnd = ::WindowFromPoint(mp);

  // GetTopLevelHWND will return a HWND for the window frame (which includes
  // the non-client area).  If the mouse has moved into the non-client area,
  // we should treat it as a top-level exit.
  HWND mouseTopLevel = nsWindow::GetTopLevelHWND(mouseWnd);
  if (mouseWnd == mouseTopLevel)
    return PR_TRUE;

  return nsWindow::GetTopLevelHWND(aWnd) != mouseTopLevel;
}

//-------------------------------------------------------------------------
//
// Deal with all sort of mouse event
//
//-------------------------------------------------------------------------
PRBool nsWindow::DispatchMouseEvent(PRUint32 aEventType, WPARAM wParam,
                                    LPARAM lParam, PRBool aIsContextMenuKey,
                                    PRInt16 aButton)
{
  PRBool result = PR_FALSE;

  if (!mEventCallback) {
    return result;
  }

  nsIntPoint eventPoint;
  eventPoint.x = GET_X_LPARAM(lParam);
  eventPoint.y = GET_Y_LPARAM(lParam);

  nsMouseEvent event(PR_TRUE, aEventType, this, nsMouseEvent::eReal,
                     aIsContextMenuKey
                     ? nsMouseEvent::eContextMenuKey
                     : nsMouseEvent::eNormal);
  if (aEventType == NS_CONTEXTMENU && aIsContextMenuKey) {
    nsIntPoint zero(0, 0);
    InitEvent(event, &zero);
  } else {
    InitEvent(event, &eventPoint);
  }

  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.button    = aButton;

  nsIntPoint mpScreen = eventPoint + WidgetToScreenOffset();

  // Suppress mouse moves caused by widget creation
  if (aEventType == NS_MOUSE_MOVE) 
  {
    if ((gLastMouseMovePoint.x == mpScreen.x) && (gLastMouseMovePoint.y == mpScreen.y))
      return result;
    gLastMouseMovePoint.x = mpScreen.x;
    gLastMouseMovePoint.y = mpScreen.y;
  }

  PRBool insideMovementThreshold = (abs(gLastMousePoint.x - eventPoint.x) < (short)::GetSystemMetrics(SM_CXDOUBLECLK)) &&
                                   (abs(gLastMousePoint.y - eventPoint.y) < (short)::GetSystemMetrics(SM_CYDOUBLECLK));

  BYTE eventButton;
  switch (aButton) {
    case nsMouseEvent::eLeftButton:
      eventButton = VK_LBUTTON;
      break;
    case nsMouseEvent::eMiddleButton:
      eventButton = VK_MBUTTON;
      break;
    case nsMouseEvent::eRightButton:
      eventButton = VK_RBUTTON;
      break;
    default:
      eventButton = 0;
      break;
  }

  // Doubleclicks are used to set the click count, then changed to mousedowns
  // We're going to time double-clicks from mouse *up* to next mouse *down*
  LONG curMsgTime = ::GetMessageTime();

  if (aEventType == NS_MOUSE_DOUBLECLICK) {
    event.message = NS_MOUSE_BUTTON_DOWN;
    event.button = aButton;
    gLastClickCount = 2;
  }
  else if (aEventType == NS_MOUSE_BUTTON_UP) {
    // remember when this happened for the next mouse down
    gLastMousePoint.x = eventPoint.x;
    gLastMousePoint.y = eventPoint.y;
    gLastMouseButton = eventButton;
  }
  else if (aEventType == NS_MOUSE_BUTTON_DOWN) {
    // now look to see if we want to convert this to a double- or triple-click

#ifdef NS_DEBUG_XX
    printf("Msg: %d Last: %d Dif: %d Max %d\n", curMsgTime, gLastMouseDownTime, curMsgTime-gLastMouseDownTime, ::GetDoubleClickTime());
    printf("Mouse %d %d\n", abs(gLastMousePoint.x - mp.x), abs(gLastMousePoint.y - mp.y));
#endif
    if (((curMsgTime - gLastMouseDownTime) < (LONG)::GetDoubleClickTime()) && insideMovementThreshold &&
        eventButton == gLastMouseButton) {
      gLastClickCount ++;
    } else {
      // reset the click count, to count *this* click
      gLastClickCount = 1;
    }
    // Set last Click time on MouseDown only
    gLastMouseDownTime = curMsgTime;
  }
  else if (aEventType == NS_MOUSE_MOVE && !insideMovementThreshold) {
    gLastClickCount = 0;
  }
  else if (aEventType == NS_MOUSE_EXIT) {
    event.exit = IsTopLevelMouseExit(mWnd) ? nsMouseEvent::eTopLevel : nsMouseEvent::eChild;
  }
  event.clickCount = gLastClickCount;

#ifdef NS_DEBUG_XX
  printf("Msg Time: %d Click Count: %d\n", curMsgTime, event.clickCount);
#endif

  nsPluginEvent pluginEvent;

  switch (aEventType)
  {
    case NS_MOUSE_BUTTON_DOWN:
      switch (aButton) {
        case nsMouseEvent::eLeftButton:
          pluginEvent.event = WM_LBUTTONDOWN;
          break;
        case nsMouseEvent::eMiddleButton:
          pluginEvent.event = WM_MBUTTONDOWN;
          break;
        case nsMouseEvent::eRightButton:
          pluginEvent.event = WM_RBUTTONDOWN;
          break;
        default:
          break;
      }
      break;
    case NS_MOUSE_BUTTON_UP:
      switch (aButton) {
        case nsMouseEvent::eLeftButton:
          pluginEvent.event = WM_LBUTTONUP;
          break;
        case nsMouseEvent::eMiddleButton:
          pluginEvent.event = WM_MBUTTONUP;
          break;
        case nsMouseEvent::eRightButton:
          pluginEvent.event = WM_RBUTTONUP;
          break;
        default:
          break;
      }
      break;
    case NS_MOUSE_DOUBLECLICK:
      switch (aButton) {
        case nsMouseEvent::eLeftButton:
          pluginEvent.event = WM_LBUTTONDBLCLK;
          break;
        case nsMouseEvent::eMiddleButton:
          pluginEvent.event = WM_MBUTTONDBLCLK;
          break;
        case nsMouseEvent::eRightButton:
          pluginEvent.event = WM_RBUTTONDBLCLK;
          break;
        default:
          break;
      }
      break;
    case NS_MOUSE_MOVE:
      pluginEvent.event = WM_MOUSEMOVE;
      break;
    default:
      pluginEvent.event = WM_NULL;
      break;
  }

  pluginEvent.wParam = wParam;     // plugins NEED raw OS event flags!
  pluginEvent.lParam = lParam;

  event.nativeMsg = (void *)&pluginEvent;

  // call the event callback
  if (nsnull != mEventCallback) {
    if (nsToolkit::gMouseTrailer)
      nsToolkit::gMouseTrailer->Disable();
    if (aEventType == NS_MOUSE_MOVE) {
      if (nsToolkit::gMouseTrailer && !mIsInMouseCapture) {
        nsToolkit::gMouseTrailer->SetMouseTrailerWindow(mWnd);
      }
      nsIntRect rect;
      GetBounds(rect);
      rect.x = 0;
      rect.y = 0;

      if (rect.Contains(event.refPoint)) {
        if (gCurrentWindow == NULL || gCurrentWindow != this) {
          if ((nsnull != gCurrentWindow) && (!gCurrentWindow->mIsDestroying)) {
            LPARAM pos = gCurrentWindow->lParamToClient(lParamToScreen(lParam));
            gCurrentWindow->DispatchMouseEvent(NS_MOUSE_EXIT, wParam, pos);
          }
          gCurrentWindow = this;
          if (!mIsDestroying) {
            LPARAM pos = gCurrentWindow->lParamToClient(lParamToScreen(lParam));
            gCurrentWindow->DispatchMouseEvent(NS_MOUSE_ENTER, wParam, pos);
          }
        }
      }
    } else if (aEventType == NS_MOUSE_EXIT) {
      if (gCurrentWindow == this) {
        gCurrentWindow = nsnull;
      }
    }

    result = DispatchWindowEvent(&event);

    if (nsToolkit::gMouseTrailer)
      nsToolkit::gMouseTrailer->Enable();

    // Release the widget with NS_IF_RELEASE() just in case
    // the context menu key code in nsEventListenerManager::HandleEvent()
    // released it already.
    return result;
  }

  return result;
}

//-------------------------------------------------------------------------
//
// Deal with accessibile event
//
//-------------------------------------------------------------------------
#ifdef ACCESSIBILITY
PRBool nsWindow::DispatchAccessibleEvent(PRUint32 aEventType, nsIAccessible** aAcc, nsIntPoint* aPoint)
{
  PRBool result = PR_FALSE;

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

  *aAcc = nsnull;

  nsAccessibleEvent event(PR_TRUE, aEventType, this);
  InitEvent(event, 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.accessible = nsnull;

  result = DispatchWindowEvent(&event);

  // if the event returned an accesssible get it.
  if (event.accessible)
    *aAcc = event.accessible;

  return result;
}
#endif

//-------------------------------------------------------------------------
//
// Deal with focus messages
//
//-------------------------------------------------------------------------
PRBool nsWindow::DispatchFocus(PRUint32 aEventType, PRBool isMozWindowTakingFocus)
{
  // call the event callback
  if (mEventCallback) {
    nsFocusEvent event(PR_TRUE, aEventType, this);
    InitEvent(event);

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

    event.isMozWindowTakingFocus = isMozWindowTakingFocus;

    nsPluginEvent pluginEvent;

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

    event.nativeMsg = (void *)&pluginEvent;

    return DispatchWindowEvent(&event);
  }
  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, WPARAM wParam, LPARAM lParam,
                                       PRBool aIsContextMenuKey, PRInt16 aButton)
{
  PRBool result = PR_FALSE;

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

  switch (aEventType) {
    case NS_MOUSE_BUTTON_DOWN:
      CaptureMouse(PR_TRUE);
      break;

    // NS_MOUSE_MOVE and NS_MOUSE_EXIT are here because we need to make sure capture flag
    // isn't left on after a drag where we wouldn't see a button up message (see bug 324131).
    case NS_MOUSE_BUTTON_UP:
    case NS_MOUSE_MOVE:
    case NS_MOUSE_EXIT:
      if (!(wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)) && mIsInMouseCapture)
        CaptureMouse(PR_FALSE);
      break;

    default:
      break;

  } // switch

  return nsWindow::DispatchMouseEvent(aEventType, wParam, lParam,
                                      aIsContextMenuKey, aButton);
}

//-------------------------------------------------------------------------
//
// return the style for a child nsWindow
//
//-------------------------------------------------------------------------
DWORD ChildWindow::WindowStyle()
{
  DWORD style = WS_CLIPCHILDREN | nsWindow::WindowStyle();
  if (!(style & WS_POPUP))
    style |= WS_CHILD; // WS_POPUP and WS_CHILD are mutually exclusive.
  VERIFY_WINDOW_STYLE(style);
  return style;
}

NS_METHOD nsWindow::SetTitle(const nsAString& aTitle)
{
  const nsString& strTitle = PromiseFlatString(aTitle);
  ::SendMessageW(mWnd, WM_SETTEXT, (WPARAM)0, (LPARAM)(LPCWSTR)strTitle.get());
  return NS_OK;
}

NS_METHOD nsWindow::SetIcon(const nsAString& aIconSpec) 
{
#ifndef WINCE
  // Assume the given string is a local identifier for an icon file.

  nsCOMPtr<nsILocalFile> iconFile;
  ResolveIconName(aIconSpec, NS_LITERAL_STRING(".ico"),
                  getter_AddRefs(iconFile));
  if (!iconFile)
    return NS_OK; // not an error if icon is not found

  nsAutoString iconPath;
  iconFile->GetPath(iconPath);

  // XXX this should use MZLU (see bug 239279)

  ::SetLastError(0);

  HICON bigIcon = (HICON)::LoadImageW(NULL,
                                      (LPCWSTR)iconPath.get(),
                                      IMAGE_ICON,
                                      ::GetSystemMetrics(SM_CXICON),
                                      ::GetSystemMetrics(SM_CYICON),
                                      LR_LOADFROMFILE );
  HICON smallIcon = (HICON)::LoadImageW(NULL,
                                        (LPCWSTR)iconPath.get(),
                                        IMAGE_ICON,
                                        ::GetSystemMetrics(SM_CXSMICON),
                                        ::GetSystemMetrics(SM_CYSMICON),
                                        LR_LOADFROMFILE );

  if (bigIcon) {
    HICON icon = (HICON) ::SendMessageW(mWnd, WM_SETICON, (WPARAM)ICON_BIG, (LPARAM)bigIcon);
    if (icon)
      ::DestroyIcon(icon);
  }
#ifdef DEBUG_SetIcon
  else {
    NS_LossyConvertUTF16toASCII cPath(iconPath);
    printf( "\nIcon load error; icon=%s, rc=0x%08X\n\n", cPath.get(), ::GetLastError() );
  }
#endif
  if (smallIcon) {
    HICON icon = (HICON) ::SendMessageW(mWnd, WM_SETICON, (WPARAM)ICON_SMALL, (LPARAM)smallIcon);
    if (icon)
      ::DestroyIcon(icon);
  }
#ifdef DEBUG_SetIcon
  else {
    NS_LossyConvertUTF16toASCII cPath(iconPath);
    printf( "\nSmall icon load error; icon=%s, rc=0x%08X\n\n", cPath.get(), ::GetLastError() );
  }
#endif
#endif // WINCE
  return NS_OK;
}


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

static PRBool ShouldDrawCompositionStringOurselves()
{
#ifdef WINCE
  // We are not sure we should use native IME behavior...
  return PR_TRUE;
#else
  return gKbdLayout.ShouldDrawCompositionStringOurselves();
#endif
}

PRBool
nsWindow::GetCharacterRectOfSelectedTextAt(PRInt32 aOffset,
                                           nsIntRect &aCharRect)
{
  nsIntPoint point(0, 0);

  nsQueryContentEvent selection(PR_TRUE, NS_QUERY_SELECTED_TEXT, this);
  InitEvent(selection, &point);
  DispatchWindowEvent(&selection);
  if (!selection.mSucceeded)
    return PR_FALSE;

  PRUint32 offset = selection.mReply.mOffset + aOffset;
  PRBool useCaretRect = selection.mReply.mString.IsEmpty();
  if (useCaretRect && ShouldDrawCompositionStringOurselves() &&
      sIMEIsComposing && sIMECompUnicode && !sIMECompUnicode->IsEmpty()) {
    // There is not a normal selection, but we have composition string.
    // XXX mnakano - Should we implement NS_QUERY_IME_SELECTED_TEXT?
    useCaretRect = PR_FALSE;
    if (sIMECursorPosition != NO_IME_CARET) {
      PRUint32 cursorPosition =
        PR_MIN(PRUint32(sIMECursorPosition), sIMECompUnicode->Length());
      offset -= cursorPosition;
      NS_ASSERTION(offset >= 0, "offset is negative!");
    }
  }

  nsIntRect r;
  if (!useCaretRect) {
    nsQueryContentEvent charRect(PR_TRUE, NS_QUERY_TEXT_RECT, this);
    charRect.InitForQueryTextRect(offset, 1);
    InitEvent(charRect, &point);
    DispatchWindowEvent(&charRect);
    if (charRect.mSucceeded)
      aCharRect = charRect.mReply.mRect;
    else
      useCaretRect = PR_TRUE;
  }

  return useCaretRect ? GetCaretRect(aCharRect) : PR_TRUE;
}

PRBool
nsWindow::GetCaretRect(nsIntRect &aCaretRect)
{
  nsIntPoint point(0, 0);

  nsQueryContentEvent selection(PR_TRUE, NS_QUERY_SELECTED_TEXT, this);
  InitEvent(selection, &point);
  DispatchWindowEvent(&selection);
  if (!selection.mSucceeded)
    return PR_FALSE;

  PRUint32 offset = selection.mReply.mOffset;

  nsQueryContentEvent caretRect(PR_TRUE, NS_QUERY_CARET_RECT, this);
  caretRect.InitForQueryCaretRect(offset);
  InitEvent(caretRect, &point);
  DispatchWindowEvent(&caretRect);
  if (!caretRect.mSucceeded)
    return PR_FALSE;
  aCaretRect = caretRect.mReply.mRect;
  return PR_TRUE;
}

PRBool
nsWindow::SetIMERelatedWindowsPos(HIMC aIMEContext)
{
  nsIntRect r;
  // Get first character rect of current a normal selected text or a composing
  // string.
  PRBool ret = GetCharacterRectOfSelectedTextAt(0, r);
  NS_ENSURE_TRUE(ret, PR_FALSE);
  nsWindow* toplevelWindow = GetTopLevelWindow(PR_FALSE);
  nsIntRect firstSelectedCharRect;
  ResolveIMECaretPos(toplevelWindow, r, this, firstSelectedCharRect);

  // Set native caret size/position to our caret. Some IMEs honor it. E.g.,
  // "Intelligent ABC" (Simplified Chinese) and "MS PinYin 3.0" (Simplified
  // Chinese) on XP.
  nsIntRect caretRect(firstSelectedCharRect);
  if (GetCaretRect(r)) {
    ResolveIMECaretPos(toplevelWindow, r, this, caretRect);
  } else {
    NS_WARNING("failed to get caret rect");
    caretRect.width = 1;
  }
  if (!sIMENativeCaretIsCreated) {
    sIMENativeCaretIsCreated =
      ::CreateCaret(mWnd, nsnull, caretRect.width, caretRect.height);
  }
  ::SetCaretPos(caretRect.x, caretRect.y);

  if (ShouldDrawCompositionStringOurselves()) {
    // Get a rect of first character in current target in composition string.
    if (sIMEIsComposing && sIMECompUnicode && !sIMECompUnicode->IsEmpty()) {
      // If there are no targetted selection, we should use it's first character
      // rect instead.
      PRInt32 offset = 0;
      for (int i = 0; i < sIMEAttributeArrayLength; i++) {
        if (sIMEAttributeArray[i] == ATTR_TARGET_NOTCONVERTED ||
            sIMEAttributeArray[i] == ATTR_TARGET_CONVERTED) {
          offset = i;
          break;
        }
      }
      ret = GetCharacterRectOfSelectedTextAt(offset, r);
      NS_ENSURE_TRUE(ret, PR_FALSE);
    } else {
      // If there are no composition string, we should use a first character rect.
      ret = GetCharacterRectOfSelectedTextAt(0, r);
      NS_ENSURE_TRUE(ret, PR_FALSE);
    }
    nsIntRect firstTargetCharRect;
    ResolveIMECaretPos(toplevelWindow, r, this, firstTargetCharRect);

    // Move the candidate window to first character position of the target.
    CANDIDATEFORM candForm;
    candForm.dwIndex = 0;
    candForm.dwStyle = CFS_EXCLUDE;
    candForm.ptCurrentPos.x = firstTargetCharRect.x;
    candForm.ptCurrentPos.y = firstTargetCharRect.y;
    candForm.rcArea.right = candForm.rcArea.left = candForm.ptCurrentPos.x;
    candForm.rcArea.top = candForm.ptCurrentPos.y;
    candForm.rcArea.bottom = candForm.ptCurrentPos.y + firstTargetCharRect.height;
    ::ImmSetCandidateWindow(aIMEContext, &candForm);
  } else {
    // Move the composition window to caret position (if selected some
    // characters, we should use first character rect of them).
    // And in this mode, IME adjusts the candidate window position
    // automatically. So, we don't need to set it.
    COMPOSITIONFORM compForm;
    compForm.dwStyle = CFS_POINT;
    compForm.ptCurrentPos.x = firstSelectedCharRect.x;
    compForm.ptCurrentPos.y = firstSelectedCharRect.y;
    ::ImmSetCompositionWindow(aIMEContext, &compForm);
  }

  return PR_TRUE;
}

void
nsWindow::HandleTextEvent(HIMC hIMEContext, PRBool aCheckAttr)
{
  NS_ASSERTION(sIMECompUnicode, "sIMECompUnicode is null");
  NS_ASSERTION(sIMEIsComposing, "conflict state");

  if (!sIMECompUnicode)
    return;

  // If we don't need to draw composition string ourselves and this is not
  // commit event (i.e., under composing), we don't need to fire text event
  // during composing.
  if (aCheckAttr && !ShouldDrawCompositionStringOurselves()) {
    // But we need to adjust composition window pos and native caret pos, here.
    SetIMERelatedWindowsPos(hIMEContext);
    return;
  }

  nsTextEvent event(PR_TRUE, NS_TEXT_TEXT, this);
  nsIntPoint point(0, 0);

  InitEvent(event, &point);

  if (aCheckAttr) {
    GetTextRangeList(&(event.rangeCount),&(event.rangeArray));
  } else {
    event.rangeCount = 0;
    event.rangeArray = nsnull;
  }

  event.theText = sIMECompUnicode->get();
  event.isShift = mIsShiftDown;
  event.isControl = mIsControlDown;
  event.isMeta = PR_FALSE;
  event.isAlt = mIsAltDown;

  DispatchWindowEvent(&event);

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

  //
  // Post process event
  //

  SetIMERelatedWindowsPos(hIMEContext);

  if (event.theReply.mCursorPosition.width || event.theReply.mCursorPosition.height)
  {
    nsIntRect cursorPosition;
    ResolveIMECaretPos(event.theReply.mReferenceWidget,
                       event.theReply.mCursorPosition,
                       this, cursorPosition);

    // Record previous composing char position
    // The cursor is always on the right char before it, but not necessarily on the
    // left of next char, as what happens in wrapping.
    if (sIMECursorPosition > 0 && sIMECompCharPos &&
        sIMECursorPosition < IME_MAX_CHAR_POS) {
      sIMECompCharPos[sIMECursorPosition-1].right = cursorPosition.x;
      sIMECompCharPos[sIMECursorPosition-1].top = cursorPosition.y;
      sIMECompCharPos[sIMECursorPosition-1].bottom = cursorPosition.YMost();
      if (sIMECompCharPos[sIMECursorPosition-1].top != cursorPosition.y) {
        // wrapping, invalidate left position
        sIMECompCharPos[sIMECursorPosition-1].left = -1;
      }
      sIMECompCharPos[sIMECursorPosition].left = cursorPosition.x;
      sIMECompCharPos[sIMECursorPosition].top = cursorPosition.y;
      sIMECompCharPos[sIMECursorPosition].bottom = cursorPosition.YMost();
    }
  } else {
    // for some reason we don't know yet, theReply may contain invalid result
    // need more debugging in nsCaret to find out the reason
    // the best we can do now is to ignore the invalid result
  }
}

void
nsWindow::HandleStartComposition(HIMC hIMEContext)
{
  NS_PRECONDITION(mIMEEnabled != nsIWidget::IME_STATUS_PLUGIN,
    "HandleStartComposition should not be called when a plug-in has focus");

  // ATOK send the messages following order at starting composition.
  // 1. WM_IME_COMPOSITION
  // 2. WM_IME_STARTCOMPOSITION
  // We call this function at both step #1 and #2.
  // However, the composition start event should occur only once.
  if (sIMEIsComposing)
    return;

  nsCompositionEvent event(PR_TRUE, NS_COMPOSITION_START, this);
  nsIntPoint point(0, 0);
  InitEvent(event, &point);
  DispatchWindowEvent(&event);

  //
  // Post process event
  //

  SetIMERelatedWindowsPos(hIMEContext);

  if (event.theReply.mCursorPosition.width || event.theReply.mCursorPosition.height)
  {
    nsIntRect cursorPosition;
    ResolveIMECaretPos(event.theReply.mReferenceWidget,
                       event.theReply.mCursorPosition,
                       this, cursorPosition);

    sIMECompCharPos = (RECT*)PR_MALLOC(IME_MAX_CHAR_POS*sizeof(RECT));
    if (sIMECompCharPos) {
      memset(sIMECompCharPos, -1, sizeof(RECT)*IME_MAX_CHAR_POS);
      sIMECompCharPos[0].left = cursorPosition.x;
      sIMECompCharPos[0].top = cursorPosition.y;
      sIMECompCharPos[0].bottom = cursorPosition.YMost();
    }
  } else {
    // for some reason we don't know yet, theReply may contain invalid result
    // need more debugging in nsCaret to find out the reason
    // the best we can do now is to ignore the invalid result
  }

  if (!sIMECompUnicode)
    sIMECompUnicode = new nsString();
  sIMEIsComposing = PR_TRUE;
}

void
nsWindow::HandleEndComposition(void)
{
  if (!sIMEIsComposing)
    return;

  if (mIMEEnabled == nsIWidget::IME_STATUS_PLUGIN) {
    sIMEIsComposing = PR_FALSE;
    return;
  }

  nsCompositionEvent event(PR_TRUE, NS_COMPOSITION_END, this);
  nsIntPoint point(0, 0);

  if (sIMENativeCaretIsCreated) {
    ::DestroyCaret();
    sIMENativeCaretIsCreated = PR_FALSE;
  }

  InitEvent(event,&point);
  DispatchWindowEvent(&event);
  PR_FREEIF(sIMECompCharPos);
  sIMECompCharPos = nsnull;
  sIMEIsComposing = 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;
  }
}


void
nsWindow::GetTextRangeList(PRUint32* aListLength,
                           nsTextRangeArray* textRangeListResult)
{
  NS_ASSERTION(sIMECompUnicode, "sIMECompUnicode is null");
  // Sogou (Simplified Chinese IME) returns contradictory values: The cursor
  // position is actual cursor position. However, other values (composition
  // string and attributes) are empty. So, if you remove following assertion,
  // be careful.
  NS_ASSERTION(ShouldDrawCompositionStringOurselves(),
    "GetTextRangeList is called when we don't need to fire text event");

  if (!sIMECompUnicode)
    return;

  long maxlen = sIMECompUnicode->Length();
  long cursor = sIMECursorPosition;
  NS_ASSERTION(cursor <= maxlen, "wrong cursor position");
  if (cursor > maxlen)
    cursor = maxlen;

  if (sIMECompClauseArrayLength == 0) {
    // Some IMEs don't return clause array information, then, we assume that
    // all characters in the composition string are in one clause.
    *aListLength = 1;
    // need one more room for caret
    *textRangeListResult = new nsTextRange[*aListLength + 1];
    (*textRangeListResult)[0].mStartOffset = 0;
    (*textRangeListResult)[0].mEndOffset = maxlen;
    (*textRangeListResult)[0].mRangeType = NS_TEXTRANGE_RAWINPUT;
  } else {
    *aListLength = sIMECompClauseArrayLength - 1;

    // need one more room for caret
    *textRangeListResult = new nsTextRange[*aListLength + 1];

    // iterate over the attributes
    int lastOffset = 0;
    for (unsigned int i = 0; i < *aListLength; i++) {
      long current = sIMECompClauseArray[i + 1];
      NS_ASSERTION(current <= maxlen, "wrong offset");
      if(current > maxlen)
        current = maxlen;

      (*textRangeListResult)[i].mRangeType = 
        PlatformToNSAttr(sIMEAttributeArray[lastOffset]);
      (*textRangeListResult)[i].mStartOffset = lastOffset;
      (*textRangeListResult)[i].mEndOffset = current;

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

  if (cursor == NO_IME_CARET)
    return;

  (*textRangeListResult)[*aListLength].mStartOffset = cursor;
  (*textRangeListResult)[*aListLength].mEndOffset = cursor;
  (*textRangeListResult)[*aListLength].mRangeType = NS_TEXTRANGE_CARETPOSITION;
  ++(*aListLength);
}


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

  if (sIMEIsComposing) {
    HandleEndComposition();
  }

#ifndef WINCE
  gKbdLayout.LoadLayout(aHKL);
#endif

  return PR_FALSE;   // always pass to child window
}
//==========================================================================
BOOL nsWindow::OnIMEChar(wchar_t uniChar, LPARAM aKeyState)
{
#ifdef DEBUG_IME
  printf("OnIMEChar\n");
#endif

  // We don't need to fire any text events from here. This method will be
  // called when the composition string of the current IME is not drawn by us
  // and some characters are committed. In that case, the committed string was
  // processed in nsWindow::OnIMEComposition already.

  // We need to return TRUE here so that Windows doesn't
  // send two WM_CHAR msgs
  return PR_TRUE;
}

//==========================================================================
// This function is used when aIndex is GCS_COMPSTR, GCS_COMPREADSTR,
// GCS_RESULTSTR, and GCS_RESULTREADSTR.
// Otherwise use ::ImmGetCompositionStringW.
void nsWindow::GetCompositionString(HIMC aHIMC, DWORD aIndex)
{
  // Retrieve the size of the required output buffer.
  long lRtn = ::ImmGetCompositionStringW(aHIMC, aIndex, NULL, 0);
  if (lRtn < 0 ||
      !EnsureStringLength(*sIMECompUnicode, (lRtn / sizeof(WCHAR)) + 1))
    return; // Error or out of memory.

  // Actually retrieve the composition string information.
  lRtn = ::ImmGetCompositionStringW(aHIMC, aIndex,
                                    (LPVOID)sIMECompUnicode->BeginWriting(),
                                    lRtn + sizeof(WCHAR));
  sIMECompUnicode->SetLength(lRtn / sizeof(WCHAR));
}

PRBool nsWindow::ConvertToANSIString(const nsAFlatString& aStr, UINT aCodePage,
                                     nsACString& aANSIStr)
{
  int len = ::WideCharToMultiByte(aCodePage, 0,
                                  (LPCWSTR)aStr.get(), aStr.Length(),
                                  NULL, 0, NULL, NULL);
  NS_ENSURE_TRUE(len >= 0, PR_FALSE);

  if (!EnsureStringLength(aANSIStr, len))
    return PR_FALSE;
  ::WideCharToMultiByte(aCodePage, 0, (LPCWSTR)aStr.get(), aStr.Length(),
                        (LPSTR)aANSIStr.BeginWriting(), len, NULL, NULL);
  return PR_TRUE;
}

//==========================================================================
BOOL nsWindow::OnIMEComposition(LPARAM aGCS)
{
#ifdef DEBUG_IME
  printf("OnIMEComposition\n");
#endif
  NS_PRECONDITION(mIMEEnabled != nsIWidget::IME_STATUS_PLUGIN,
    "OnIMEComposition should not be called when a plug-in has focus");

  // for bug #60050
  // MS-IME 95/97/98/2000 may send WM_IME_COMPOSITION with non-conversion
  // mode before it send WM_IME_STARTCOMPOSITION.
  if (!sIMECompUnicode) {
    sIMECompUnicode = new nsString();
    if (NS_UNLIKELY(!sIMECompUnicode)) {
      NS_ASSERTION(sIMECompUnicode, "sIMECompUnicode is null");
      return PR_TRUE;
    }
  }

  HIMC hIMEContext = ::ImmGetContext(mWnd);
  if (hIMEContext==NULL) 
    return PR_TRUE;

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

  PRBool startCompositionMessageHasBeenSent = sIMEIsComposing;

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

    GetCompositionString(hIMEContext, GCS_RESULTSTR);
#ifdef DEBUG_IME
    printf("GCS_RESULTSTR compStrLen = %d\n", sIMECompUnicode->Length());
#endif
    result = PR_TRUE;
    HandleTextEvent(hIMEContext, PR_FALSE);
    HandleEndComposition();
  }


  //
  // This provides us with a composition string
  //
  if (IS_COMPOSING_LPARAM(aGCS))
  {
#ifdef DEBUG_IME
    printf("Handling GCS_COMPSTR\n");
#endif

    if (!sIMEIsComposing) 
      HandleStartComposition(hIMEContext);

    //--------------------------------------------------------
    // 1. Get GCS_COMPSTR
    //--------------------------------------------------------
    GetCompositionString(hIMEContext, GCS_COMPSTR);

    // See https://bugzilla.mozilla.org/show_bug.cgi?id=296339
    if (sIMECompUnicode->IsEmpty() &&
        !startCompositionMessageHasBeenSent) {
      // In this case, maybe, the sender is MSPinYin. That sends *only*
      // WM_IME_COMPOSITION with GCS_COMP* and GCS_RESULT* when
      // user inputted the Chinese full stop. So, that doesn't send
      // WM_IME_STARTCOMPOSITION and WM_IME_ENDCOMPOSITION.
      // If WM_IME_STARTCOMPOSITION was not sent and the composition
      // string is null (it indicates the composition transaction ended),
      // WM_IME_ENDCOMPOSITION may not be sent. If so, we cannot run
      // HandleEndComposition() in other place.
#ifdef DEBUG_IME
      printf("Aborting GCS_COMPSTR\n");
#endif
      HandleEndComposition();
      return result;
    }

#ifdef DEBUG_IME
    printf("GCS_COMPSTR compStrLen = %d\n", sIMECompUnicode->Length());
#endif

    //--------------------------------------------------------
    // 2. Get GCS_COMPCLAUSE
    //--------------------------------------------------------
    long compClauseArrayByteCount =
      ::ImmGetCompositionStringW(hIMEContext, GCS_COMPCLAUSE, NULL, 0);
#ifdef DEBUG_IME
    printf("GCS_COMPCLAUSE compClauseArrayByteCount = %d\n",
           compClauseArrayByteCount);
#endif
    long compClauseArrayLength = compClauseArrayByteCount / sizeof(PRUint32);
    if (compClauseArrayLength > 0) {
      if (compClauseArrayByteCount > sIMECompClauseArraySize) {
        if (sIMECompClauseArray)
          delete [] sIMECompClauseArray;
        // Allocate some extra space to avoid reallocations.
        PRInt32 arrayLength = compClauseArrayLength + 32;
        sIMECompClauseArray = new PRUint32[arrayLength];
        sIMECompClauseArraySize = arrayLength * sizeof(PRUint32);
      }

#ifndef WINCE
      // Intelligent ABC IME (Simplified Chinese IME, the code page is 936)
      // will crash in ImmGetCompositionStringW for GCS_COMPCLAUSE (bug 424663).
      // See comment 35 of the bug for the detail. Therefore, we should use A
      // API for it, however, we should not kill Unicode support on all IMEs.
      PRBool useA_API = !(gKbdLayout.GetIMEProperty() & IME_PROP_UNICODE);
#else
      PRBool useA_API =  PR_TRUE;
#endif
      long compClauseArrayByteCount2 = 
#ifndef WINCE
        useA_API ?
        ::ImmGetCompositionStringA(hIMEContext, GCS_COMPCLAUSE,
                                   sIMECompClauseArray,
                                   sIMECompClauseArraySize) :
#endif
        ::ImmGetCompositionStringW(hIMEContext, GCS_COMPCLAUSE,
                                   sIMECompClauseArray,
                                   sIMECompClauseArraySize);
      NS_ASSERTION(compClauseArrayByteCount2 == compClauseArrayByteCount,
                   "strange result");
      if (compClauseArrayByteCount > compClauseArrayByteCount2)
        compClauseArrayLength = compClauseArrayByteCount2 / sizeof(PRUint32);

      if (useA_API) {
        // Convert each values of sIMECompClauseArray. The values mean offset of
        // the clauses in ANSI string. But we need the values in Unicode string.
        nsCAutoString compANSIStr;
        if (ConvertToANSIString(*sIMECompUnicode,
#ifndef WINCE
                                gKbdLayout.GetCodePage(), 
#else
                                GetACP(),
#endif
                                compANSIStr)) {
          PRUint32 maxlen = compANSIStr.Length();
          sIMECompClauseArray[0] = 0; // first value must be 0
          for (PRInt32 i = 1; i < compClauseArrayLength; i++) {
            PRUint32 len = PR_MIN(sIMECompClauseArray[i], maxlen);
            sIMECompClauseArray[i] =
              ::MultiByteToWideChar(
#ifndef WINCE
                                    gKbdLayout.GetCodePage(), 
#else
                                    GetACP(),
#endif
                                    MB_PRECOMPOSED,
                                    (LPCSTR)compANSIStr.get(), len, NULL, 0);
          }
        }
      }
    }
    // compClauseArrayLength may be negative. I.e., ImmGetCompositionStringW
    // may return an error code.
    sIMECompClauseArrayLength = PR_MAX(0, compClauseArrayLength);

    //--------------------------------------------------------
    // 3. Get GCS_COMPATTR
    //--------------------------------------------------------
    // This provides us with the attribute string necessary 
    // for doing hiliting
    long attrStrLen;
    attrStrLen = ::ImmGetCompositionStringW(hIMEContext, GCS_COMPATTR, NULL, 0);
#ifdef DEBUG_IME
    printf("GCS_COMPATTR attrStrLen = %d\n", attrStrLen);
#endif
    if (attrStrLen > sIMEAttributeArraySize) {
      if (sIMEAttributeArray) 
        delete [] sIMEAttributeArray;
      // Allocate some extra space to avoid reallocations.
      PRInt32 arrayLength = attrStrLen + 64;
      sIMEAttributeArray = new PRUint8[arrayLength];
      sIMEAttributeArraySize = arrayLength * sizeof(PRUint8);
    }
    attrStrLen = ::ImmGetCompositionStringW(hIMEContext, GCS_COMPATTR, sIMEAttributeArray, sIMEAttributeArraySize);

    // attrStrLen may be negative. I.e., ImmGetCompositionStringW may return an
    // error code.
    sIMEAttributeArrayLength = PR_MAX(0, attrStrLen);

    //--------------------------------------------------------
    // 4. Get GCS_CURSOPOS
    //--------------------------------------------------------
    // Some IMEs (e.g., the standard IME for Korean) don't have caret position.
    if (aGCS & GCS_CURSORPOS) {
      sIMECursorPosition =
        ::ImmGetCompositionStringW(hIMEContext, GCS_CURSORPOS, NULL, 0);
      if (sIMECursorPosition < 0)
        sIMECursorPosition = NO_IME_CARET; // The result is error
    } else {
      sIMECursorPosition = NO_IME_CARET;
    }

    NS_ASSERTION(sIMECursorPosition <= (long)sIMECompUnicode->Length(), "illegal pos");

#ifdef DEBUG_IME
    if (aGCS & GCS_CURSORPOS)
      printf("sIMECursorPosition(Unicode): %d\n", sIMECursorPosition);
    else
      printf("sIMECursorPosition: None\n");
#endif
    //--------------------------------------------------------
    // 5. Send the text event
    //--------------------------------------------------------
    HandleTextEvent(hIMEContext);
    result = PR_TRUE;
  }
  if (!result) {
#ifdef DEBUG_IME
    fprintf(stderr, "Handle 0 length TextEvent.\n");
#endif
    if (!sIMEIsComposing) 
      HandleStartComposition(hIMEContext);

    sIMECompUnicode->Truncate();
    HandleTextEvent(hIMEContext, PR_FALSE);
    result = PR_TRUE;
  }

  ::ImmReleaseContext(mWnd, hIMEContext);
  return ShouldDrawCompositionStringOurselves() ? result : PR_FALSE;
}
//==========================================================================
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 (sIMEIsComposing) {
    HIMC hIMEContext = ::ImmGetContext(mWnd);
    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.
    sIMECompUnicode->Truncate();

    HandleTextEvent(hIMEContext, PR_FALSE);

    HandleEndComposition();
    ::ImmReleaseContext(mWnd, hIMEContext);
  }
  return ShouldDrawCompositionStringOurselves();
}
//==========================================================================
BOOL nsWindow::OnIMENotify(WPARAM aIMN, LPARAM aData)
{
#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, nsnull, 192, nsnull); // XXX hack hack hack
    if (aIMN == IMN_SETOPENSTATUS)
      sIMEIsStatusChanged = PR_TRUE;
  }
  // not implemented yet
  return PR_FALSE;
}
//==========================================================================
BOOL nsWindow::OnIMERequest(WPARAM aIMR, LPARAM aData, LRESULT *oResult)
{
#ifdef DEBUG_IME
  printf("OnIMERequest\n");
#endif
  PRBool result = PR_FALSE;

  switch (aIMR) {
    case IMR_RECONVERTSTRING:
      result = OnIMEReconvert(aData, oResult);
      break;
    case IMR_QUERYCHARPOSITION:
      result = OnIMEQueryCharPosition(aData, oResult);
      break;
  }

  return result;
}

//==========================================================================
PRBool nsWindow::OnIMEReconvert(LPARAM aData, LRESULT *oResult)
{
#ifdef DEBUG_IME
  printf("OnIMEReconvert\n");
#endif

  *oResult = 0;
  RECONVERTSTRING* pReconv = (RECONVERTSTRING*) aData;

  nsQueryContentEvent selection(PR_TRUE, NS_QUERY_SELECTED_TEXT, this);
  nsIntPoint point(0, 0);
  InitEvent(selection, &point);
  DispatchWindowEvent(&selection);
  if (!selection.mSucceeded)
    return PR_FALSE;

  if (!pReconv) {
    // Return need size to reconvert.
    if (selection.mReply.mString.IsEmpty())
      return PR_FALSE;
    PRUint32 len = selection.mReply.mString.Length();
    *oResult = sizeof(RECONVERTSTRING) + len * sizeof(WCHAR);
    return PR_TRUE;
  }

  // Fill reconvert struct
  PRUint32 len = selection.mReply.mString.Length();
  PRUint32 needSize = sizeof(RECONVERTSTRING) + len * sizeof(WCHAR);

  if (pReconv->dwSize < needSize)
    return PR_FALSE;

  *oResult = needSize;

  DWORD tmpSize = pReconv->dwSize;
  ::ZeroMemory(pReconv, tmpSize);
  pReconv->dwSize            = tmpSize;
  pReconv->dwVersion         = 0;
  pReconv->dwStrLen          = len;
  pReconv->dwStrOffset       = sizeof(RECONVERTSTRING);
  pReconv->dwCompStrLen      = len;
  pReconv->dwCompStrOffset   = 0;
  pReconv->dwTargetStrLen    = len;
  pReconv->dwTargetStrOffset = 0;

  ::CopyMemory((LPVOID) (aData + sizeof(RECONVERTSTRING)),
               selection.mReply.mString.get(), len * sizeof(WCHAR));
  return PR_TRUE;
}

//==========================================================================
PRBool nsWindow::OnIMEQueryCharPosition(LPARAM aData, LRESULT *oResult)
{
#ifdef DEBUG_IME
  printf("OnIMEQueryCharPosition\n");
#endif

  PRUint32 len = sIMEIsComposing ? sIMECompUnicode->Length() : 0;
  *oResult = FALSE;
  IMECHARPOSITION* pCharPosition = (IMECHARPOSITION*)aData;
  if (!pCharPosition ||
      pCharPosition->dwSize < sizeof(IMECHARPOSITION) ||
      ::GetFocus() != mWnd ||
      pCharPosition->dwCharPos > len)
    return PR_FALSE;

  nsIntRect r;
  PRBool ret = GetCharacterRectOfSelectedTextAt(pCharPosition->dwCharPos, r);
  NS_ENSURE_TRUE(ret, PR_FALSE);

  nsIntRect screenRect;
  // We always need top level window that is owner window of the popup window
  // even if the content of the popup window has focus.
  ResolveIMECaretPos(GetTopLevelWindow(PR_FALSE), r, nsnull, screenRect);
  pCharPosition->pt.x = screenRect.x;
  pCharPosition->pt.y = screenRect.y;

  pCharPosition->cLineHeight = r.height;

  // XXX Should we create "query focused content rect event"?
  ::GetWindowRect(mWnd, &pCharPosition->rcDocument);

  *oResult = TRUE;
  return PR_TRUE;
}

//==========================================================================
void
nsWindow::ResolveIMECaretPos(nsIWidget* aReferenceWidget,
                             nsIntRect& aCursorRect,
                             nsIWidget* aNewOriginWidget,
                             nsIntRect& aOutRect)
{
  aOutRect = aCursorRect;

  if (aReferenceWidget == aNewOriginWidget)
    return;

  if (aReferenceWidget)
    aOutRect.MoveBy(aReferenceWidget->WidgetToScreenOffset());

  if (aNewOriginWidget)
    aOutRect.MoveBy(-aNewOriginWidget->WidgetToScreenOffset());
}

//==========================================================================
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();

  if (ShouldDrawCompositionStringOurselves()) {
    aISC &= ~ISC_SHOWUICOMPOSITIONWINDOW;
  }

  // We still return false here even if we should draw a composition string
  // ourselves. Because we need to pass the aISC w/ ISC_SHOWUICOMPOSITIONWINDOW
  // directly to the default window proc so it will draw the candidate window
  // for us...
  return PR_FALSE;
}
//==========================================================================
BOOL nsWindow::OnIMEStartComposition()
{
#ifdef DEBUG_IME
  printf("OnIMEStartComposition\n");
#endif
  HIMC hIMEContext = ::ImmGetContext(mWnd);
  if (hIMEContext == NULL)
    return PR_TRUE;

  HandleStartComposition(hIMEContext);
  ::ImmReleaseContext(mWnd, hIMEContext);
  return ShouldDrawCompositionStringOurselves();
}

//==========================================================================
NS_IMETHODIMP nsWindow::ResetInputState()
{
#ifdef DEBUG_KBSTATE
  printf("ResetInputState\n");
#endif

#ifdef NS_ENABLE_TSF
  nsTextStore::CommitComposition(PR_FALSE);
#endif //NS_ENABLE_TSF

  HIMC hIMC = ::ImmGetContext(mWnd);
  if (hIMC) {
    BOOL ret = FALSE;
    ret = ::ImmNotifyIME(hIMC, NI_COMPOSITIONSTR, CPS_COMPLETE, NULL);
    ret = ::ImmNotifyIME(hIMC, NI_COMPOSITIONSTR, CPS_CANCEL, NULL);
    //NS_ASSERTION(ret, "ImmNotify failed");
    ::ImmReleaseContext(mWnd, hIMC);
  }
  return NS_OK;
}

//==========================================================================
NS_IMETHODIMP nsWindow::SetIMEOpenState(PRBool aState)
{
#ifdef DEBUG_KBSTATE
  printf("SetIMEOpenState %s\n", (aState ? "Open" : "Close"));
#endif 

#ifdef NS_ENABLE_TSF
  nsTextStore::SetIMEOpenState(aState);
#endif //NS_ENABLE_TSF

  HIMC hIMC = ::ImmGetContext(mWnd);
  if (hIMC) {
    ::ImmSetOpenStatus(hIMC, aState ? TRUE : FALSE);
    ::ImmReleaseContext(mWnd, hIMC);
  }
  return NS_OK;
}

//==========================================================================
NS_IMETHODIMP nsWindow::GetIMEOpenState(PRBool* aState)
{
  HIMC hIMC = ::ImmGetContext(mWnd);
  if (hIMC) {
    BOOL isOpen = ::ImmGetOpenStatus(hIMC);
    *aState = isOpen ? PR_TRUE : PR_FALSE;
    ::ImmReleaseContext(mWnd, hIMC);
  } else 
    *aState = PR_FALSE;

#ifdef NS_ENABLE_TSF
  *aState |= nsTextStore::GetIMEOpenState();
#endif //NS_ENABLE_TSF

  return NS_OK;
}

//==========================================================================
NS_IMETHODIMP nsWindow::SetIMEEnabled(PRUint32 aState)
{
#ifdef NS_ENABLE_TSF
  nsTextStore::SetIMEEnabled(aState);
#endif //NS_ENABLE_TSF
#ifdef DEBUG_KBSTATE
  printf("SetIMEEnabled: %s\n", (aState == nsIWidget::IME_STATUS_ENABLED ||
                                 aState == nsIWidget::IME_STATUS_PLUGIN)? 
                                "Enabled": "Disabled");
#endif 
  if (sIMEIsComposing)
    ResetInputState();
  mIMEEnabled = aState;
  PRBool enable = (aState == nsIWidget::IME_STATUS_ENABLED ||
                   aState == nsIWidget::IME_STATUS_PLUGIN);

#if defined(WINCE_HAVE_SOFTKB)
  gSoftKeyboardState = (aState != nsIWidget::IME_STATUS_DISABLED);
  ToggleSoftKB(gSoftKeyboardState);
#endif

  if (!enable != !mOldIMC)
    return NS_OK;
  mOldIMC = ::ImmAssociateContext(mWnd, enable ? mOldIMC : NULL);
  NS_ASSERTION(!enable || !mOldIMC, "Another IMC was associated");

  return NS_OK;
}

//==========================================================================
NS_IMETHODIMP nsWindow::GetIMEEnabled(PRUint32* aState)
{
#ifdef DEBUG_KBSTATE
  printf("GetIMEEnabled: %s\n", mIMEEnabled? "Enabled": "Disabled");
#endif 
  *aState = mIMEEnabled;
  return NS_OK;
}

//==========================================================================
NS_IMETHODIMP nsWindow::CancelIMEComposition()
{
#ifdef DEBUG_KBSTATE
  printf("CancelIMEComposition\n");
#endif 

#ifdef NS_ENABLE_TSF
  nsTextStore::CommitComposition(PR_TRUE);
#endif //NS_ENABLE_TSF

  HIMC hIMC = ::ImmGetContext(mWnd);
  if (hIMC) {
    BOOL ret = FALSE;
    ret = ::ImmNotifyIME(hIMC, NI_COMPOSITIONSTR, CPS_CANCEL, NULL);
    ::ImmReleaseContext(mWnd, hIMC);
  }
  return NS_OK;
}

//==========================================================================
NS_IMETHODIMP
nsWindow::GetToggledKeyState(PRUint32 aKeyCode, PRBool* aLEDState)
{
#ifdef DEBUG_KBSTATE
  printf("GetToggledKeyState\n");
#endif 
  NS_ENSURE_ARG_POINTER(aLEDState);
  *aLEDState = (::GetKeyState(aKeyCode) & 1) != 0;
  return NS_OK;
}

#define PT_IN_RECT(pt, rc)  ((pt).x>(rc).left && (pt).x <(rc).right && (pt).y>(rc).top && (pt).y<(rc).bottom)

// Mouse operation of IME
PRBool
nsWindow::IMEMouseHandling(PRInt32 aAction, LPARAM lParam)
{
#ifndef WINCE
  POINT ptPos;
  ptPos.x = (short)LOWORD(lParam);
  ptPos.y = (short)HIWORD(lParam);

  if (sIMEIsComposing && nsWindow::uWM_MSIME_MOUSE) {
    if (IMECompositionHitTest(&ptPos))
      if (HandleMouseActionOfIME(aAction, &ptPos))
        return PR_TRUE;
  } else {
    HWND parentWnd = ::GetParent(mWnd);
    if (parentWnd) {
      nsWindow* parentWidget = GetNSWindowPtr(parentWnd);
      if (parentWidget && parentWidget->sIMEIsComposing && nsWindow::uWM_MSIME_MOUSE) {
        if (parentWidget->IMECompositionHitTest(&ptPos))
          if (parentWidget->HandleMouseActionOfIME(aAction, &ptPos))
            return PR_TRUE;
      }
    }
  }
#endif
  return PR_FALSE;
}

PRBool
nsWindow::HandleMouseActionOfIME(int aAction, POINT *ptPos)
{
  PRBool IsHandle = PR_FALSE;

  if (mWnd) {
    HIMC hIMC = ::ImmGetContext(mWnd);
    if (hIMC) {
      int positioning = 0;
      int offset = 0;

      // calcurate positioning and offset
      // char :            JCH1|JCH2|JCH3
      // offset:           0011 1122 2233
      // positioning:      2301 2301 2301

      // Note: hitText has been done, so no check of sIMECompCharPos
      // and composing char maximum limit is necessary.
      PRUint32 len = sIMECompUnicode->Length();
      PRUint32 i = 0;
      for (i = 0; i < len; ++i) {
        if (PT_IN_RECT(*ptPos, sIMECompCharPos[i]))
          break;
      }
      offset = i;
      if (ptPos->x - sIMECompCharPos[i].left > sIMECompCharPos[i].right - ptPos->x)
        offset++;

      positioning = (ptPos->x - sIMECompCharPos[i].left) * 4 /
                    (sIMECompCharPos[i].right - sIMECompCharPos[i].left);
      positioning = (positioning + 2) % 4;

      // send MS_MSIME_MOUSE message to default IME window.
      HWND imeWnd = ::ImmGetDefaultIMEWnd(mWnd);
      if (::SendMessageW(imeWnd, nsWindow::uWM_MSIME_MOUSE,
                         MAKELONG(MAKEWORD(aAction, positioning), offset),
                         (LPARAM) hIMC) == 1)
        IsHandle = PR_TRUE;
    }
    ::ImmReleaseContext(mWnd, hIMC);
  }

  return IsHandle;
}

//The coordinate is relative to the upper-left corner of the client area.
PRBool nsWindow::IMECompositionHitTest(POINT * ptPos)
{
  PRBool IsHit = PR_FALSE;

  if (sIMECompCharPos){
    // figure out how many char in composing string,
    // but keep it below the limit we can handle
    PRInt32 len = sIMECompUnicode->Length();
    if (len > IME_MAX_CHAR_POS)
      len = IME_MAX_CHAR_POS;

    PRInt32 i;
    PRInt32 aveWidth = 0;
    // found per char width
    for (i = 0; i < len; i++) {
      if (sIMECompCharPos[i].left >= 0 && sIMECompCharPos[i].right > 0) {
        aveWidth = sIMECompCharPos[i].right - sIMECompCharPos[i].left;
        break;
      }
    }

    // validate each rect and test
    for (i = 0; i < len; i++) {
      if (sIMECompCharPos[i].left < 0) {
        if (i != 0 && sIMECompCharPos[i-1].top == sIMECompCharPos[i].top)
          sIMECompCharPos[i].left = sIMECompCharPos[i-1].right;
        else
          sIMECompCharPos[i].left = sIMECompCharPos[i].right - aveWidth;
      }
      if (sIMECompCharPos[i].right < 0)
        sIMECompCharPos[i].right = sIMECompCharPos[i].left + aveWidth;
      if (sIMECompCharPos[i].top < 0) {
        sIMECompCharPos[i].top = sIMECompCharPos[i-1].top;
        sIMECompCharPos[i].bottom = sIMECompCharPos[i-1].bottom;
      }

      if (PT_IN_RECT(*ptPos, sIMECompCharPos[i])) {
        IsHit = PR_TRUE;
        break;
      }
    }
  }
  return IsHit;
}

#ifdef NS_ENABLE_TSF
NS_IMETHODIMP
nsWindow::OnIMEFocusChange(PRBool aFocus)
{
  return nsTextStore::OnFocusChange(aFocus, this, mIMEEnabled);
}

NS_IMETHODIMP
nsWindow::OnIMETextChange(PRUint32 aStart,
                          PRUint32 aOldEnd,
                          PRUint32 aNewEnd)
{
  return nsTextStore::OnTextChange(aStart, aOldEnd, aNewEnd);
}

NS_IMETHODIMP
nsWindow::OnIMESelectionChange(void)
{
  return nsTextStore::OnSelectionChange();
}
#endif //NS_ENABLE_TSF


// Draw user's attention to this window until it comes to foreground.
NS_IMETHODIMP
nsWindow::GetAttention(PRInt32 aCycleCount)
{
#ifndef WINCE
  // Got window?
  if (!mWnd)
    return NS_ERROR_NOT_INITIALIZED;

  // Don't flash if the flash count is 0 or if the
  // top level window is already active.
  HWND fgWnd = ::GetForegroundWindow();
  if (aCycleCount == 0 || fgWnd == GetTopLevelHWND(mWnd))
    return NS_OK;

  HWND flashWnd = mWnd;
  while (HWND ownerWnd = ::GetWindow(flashWnd, GW_OWNER)) {
    flashWnd = ownerWnd;
  }

  // Don't flash if the owner window is active either.
  if (fgWnd == flashWnd)
    return NS_OK;

  DWORD defaultCycleCount = 0;
  ::SystemParametersInfo(SPI_GETFOREGROUNDFLASHCOUNT, 0, &defaultCycleCount, 0);

  FLASHWINFO flashInfo = { sizeof(FLASHWINFO), flashWnd,
    FLASHW_ALL, aCycleCount > 0 ? aCycleCount : defaultCycleCount, 0 };
  ::FlashWindowEx(&flashInfo);
#endif
  return NS_OK;
}

void nsWindow::StopFlashing()
{
#ifndef WINCE
  HWND flashWnd = mWnd;
  while (HWND ownerWnd = ::GetWindow(flashWnd, GW_OWNER)) {
    flashWnd = ownerWnd;
  }

  FLASHWINFO flashInfo = { sizeof(FLASHWINFO), flashWnd,
    FLASHW_STOP, 0, 0 };
  ::FlashWindowEx(&flashInfo);
#endif
}

NS_IMETHODIMP
nsWindow::GetLastInputEventTime(PRUint32& aTime)
{
  WORD qstatus = HIWORD(GetQueueStatus(QS_INPUT));

  // If there is pending input or the user is currently
  // moving the window then return the current time.
  // Note: When the user is moving the window WIN32 spins
  // a separate event loop and input events are not
  // reported to the application.
  nsToolkit* toolkit = (nsToolkit *)mToolkit;
  if (qstatus || (toolkit && toolkit->UserIsMovingWindow())) {
    gLastInputEventTime = PR_IntervalToMicroseconds(PR_IntervalNow());
  }

  aTime = gLastInputEventTime;

  return NS_OK;
}

//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
//-- NOTE!!! These hook functions can be removed when we migrate to
//-- XBL-Form Controls
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
//#define DISPLAY_NOISY_MSGF_MSG

#ifdef DISPLAY_NOISY_MSGF_MSG
typedef struct {
  char * mStr;
  int    mId;
} MSGFEventMsgInfo;

MSGFEventMsgInfo gMSGFEvents[] = {
  "MSGF_DIALOGBOX",      0,
  "MSGF_MESSAGEBOX",     1,
  "MSGF_MENU",           2,
  "MSGF_SCROLLBAR",      5,
  "MSGF_NEXTWINDOW",     6,
  "MSGF_MAX",            8,
  "MSGF_USER",           4096,
  NULL, 0};

  void PrintEvent(UINT msg, PRBool aShowAllEvents, PRBool aShowMouseMoves);
  int gLastMsgCode = 0;

#define DISPLAY_NMM_PRT(_arg) printf((_arg));
#else
#define DISPLAY_NMM_PRT(_arg)
#endif



#ifndef WINCE
//-------------------------------------------------------------------------
// Schedules a timer for a window, so we can rollup after processing the hook event
void nsWindow::ScheduleHookTimer(HWND aWnd, UINT aMsgId)
{
  // In some cases multiple hooks may be scheduled
  // so ignore any other requests once one timer is scheduled
  if (gHookTimerId == 0) {
    // Remember the window handle and the message ID to be used later
    gRollupMsgId = aMsgId;
    gRollupMsgWnd = aWnd;
    // Schedule native timer for doing the rollup after
    // this event is done being processed
    gHookTimerId = ::SetTimer(NULL, 0, 0, (TIMERPROC)HookTimerForPopups);
    NS_ASSERTION(gHookTimerId, "Timer couldn't be created.");
  }
}

//-------------------------------------------------------------------------
// Process Menu messages
// Rollup when when is clicked

LRESULT CALLBACK nsWindow::MozSpecialMsgFilter(int code, WPARAM wParam, LPARAM lParam)
{
#ifdef DISPLAY_NOISY_MSGF_MSG
  if (gProcessHook) {
    MSG* pMsg = (MSG*)lParam;

    int inx = 0;
    while (gMSGFEvents[inx].mId != code && gMSGFEvents[inx].mStr != NULL) {
      inx++;
    }
    if (code != gLastMsgCode) {
      if (gMSGFEvents[inx].mId == code) {
#ifdef DEBUG
        printf("MozSpecialMessageProc - code: 0x%X  - %s  hw: %p\n", code, gMSGFEvents[inx].mStr, pMsg->hwnd);
#endif
      } else {
#ifdef DEBUG
        printf("MozSpecialMessageProc - code: 0x%X  - %d  hw: %p\n", code, gMSGFEvents[inx].mId, pMsg->hwnd);
#endif
      }
      gLastMsgCode = code;
    }
    PrintEvent(pMsg->message, FALSE, FALSE);
  }
#endif

  if (gProcessHook && code == MSGF_MENU) {
    MSG* pMsg = (MSG*)lParam;
    ScheduleHookTimer( pMsg->hwnd, pMsg->message);
  }

  return ::CallNextHookEx(gMsgFilterHook, code, wParam, lParam);
}

//-------------------------------------------------------------------------
// Process all mouse messages
// Roll up when a click is in a native window that doesn't have an nsIWidget
LRESULT CALLBACK nsWindow::MozSpecialMouseProc(int code, WPARAM wParam, LPARAM lParam)
{
  if (gProcessHook) {
    switch (wParam) {
      case WM_LBUTTONDOWN:
      case WM_RBUTTONDOWN:
      case WM_MBUTTONDOWN:
      case WM_MOUSEWHEEL:
      case WM_MOUSEHWHEEL:
      {
        MOUSEHOOKSTRUCT* ms = (MOUSEHOOKSTRUCT*)lParam;
        nsIWidget* mozWin = (nsIWidget*)GetNSWindowPtr(ms->hwnd);
        if (mozWin) {
          // If this window is windowed plugin window, the mouse events are not
          // sent to us.
          if (static_cast<nsWindow*>(mozWin)->mIsPluginWindow)
            ScheduleHookTimer(ms->hwnd, (UINT)wParam);
        } else {
          ScheduleHookTimer(ms->hwnd, (UINT)wParam);
        }
        break;
      }
    }
  }
  return ::CallNextHookEx(gCallMouseHook, code, wParam, lParam);
}

//-------------------------------------------------------------------------
// Process all messages
// Roll up when the window is moving, or is resizing or when maximized or mininized
LRESULT CALLBACK nsWindow::MozSpecialWndProc(int code, WPARAM wParam, LPARAM lParam)
{
#ifdef DISPLAY_NOISY_MSGF_MSG
  if (gProcessHook) {
    CWPSTRUCT* cwpt = (CWPSTRUCT*)lParam;
    PrintEvent(cwpt->message, FALSE, FALSE);
  }
#endif

  if (gProcessHook) {
    CWPSTRUCT* cwpt = (CWPSTRUCT*)lParam;
    if (cwpt->message == WM_MOVING ||
        cwpt->message == WM_SIZING ||
        cwpt->message == WM_GETMINMAXINFO) {
      ScheduleHookTimer(cwpt->hwnd, (UINT)cwpt->message);
    }
  }

  return ::CallNextHookEx(gCallProcHook, code, wParam, lParam);
}

//-------------------------------------------------------------------------
// Register the special "hooks" for dropdown processing

void nsWindow::RegisterSpecialDropdownHooks()
{
  NS_ASSERTION(!gMsgFilterHook, "gMsgFilterHook must be NULL!");
  NS_ASSERTION(!gCallProcHook,  "gCallProcHook must be NULL!");

  DISPLAY_NMM_PRT("***************** Installing Msg Hooks ***************\n");

  //HMODULE hMod = GetModuleHandle("gkwidget.dll");

  // Install msg hook for moving the window and resizing
  if (!gMsgFilterHook) {
    DISPLAY_NMM_PRT("***** Hooking gMsgFilterHook!\n");
    gMsgFilterHook = SetWindowsHookEx(WH_MSGFILTER, MozSpecialMsgFilter, NULL, GetCurrentThreadId());
#ifdef DISPLAY_NOISY_MSGF_MSG
    if (!gMsgFilterHook) {
      printf("***** SetWindowsHookEx is NOT installed for WH_MSGFILTER!\n");
    }
#endif
  }

  // Install msg hook for menus
  if (!gCallProcHook) {
    DISPLAY_NMM_PRT("***** Hooking gCallProcHook!\n");
    gCallProcHook  = SetWindowsHookEx(WH_CALLWNDPROC, MozSpecialWndProc, NULL, GetCurrentThreadId());
#ifdef DISPLAY_NOISY_MSGF_MSG
    if (!gCallProcHook) {
      printf("***** SetWindowsHookEx is NOT installed for WH_CALLWNDPROC!\n");
    }
#endif
  }

  // Install msg hook for the mouse
  if (!gCallMouseHook) {
    DISPLAY_NMM_PRT("***** Hooking gCallMouseHook!\n");
    gCallMouseHook  = SetWindowsHookEx(WH_MOUSE, MozSpecialMouseProc, NULL, GetCurrentThreadId());
#ifdef DISPLAY_NOISY_MSGF_MSG
    if (!gCallMouseHook) {
      printf("***** SetWindowsHookEx is NOT installed for WH_MOUSE!\n");
    }
#endif
  }
}

//-------------------------------------------------------------------------
// Unhook special message hooks for dropdowns

void nsWindow::UnregisterSpecialDropdownHooks()
{
  DISPLAY_NMM_PRT("***************** De-installing Msg Hooks ***************\n");

  if (gCallProcHook) {
    DISPLAY_NMM_PRT("***** Unhooking gCallProcHook!\n");
    if (!::UnhookWindowsHookEx(gCallProcHook)) {
      DISPLAY_NMM_PRT("***** UnhookWindowsHookEx failed for gCallProcHook!\n");
    }
    gCallProcHook = NULL;
  }

  if (gMsgFilterHook) {
    DISPLAY_NMM_PRT("***** Unhooking gMsgFilterHook!\n");
    if (!::UnhookWindowsHookEx(gMsgFilterHook)) {
      DISPLAY_NMM_PRT("***** UnhookWindowsHookEx failed for gMsgFilterHook!\n");
    }
    gMsgFilterHook = NULL;
  }

  if (gCallMouseHook) {
    DISPLAY_NMM_PRT("***** Unhooking gCallMouseHook!\n");
    if (!::UnhookWindowsHookEx(gCallMouseHook)) {
      DISPLAY_NMM_PRT("***** UnhookWindowsHookEx failed for gCallMouseHook!\n");
    }
    gCallMouseHook = NULL;
  }
}


//-------------------------------------------------------------------------
// This timer is designed to only fire one time at most each time a "hook" function
// is used to rollup the dropdown
// In some cases, the timer may be scheduled from the hook, but that hook event or
// a subsequent event may roll up the dropdown before this timer function is executed.
//
// For example, if an MFC control takes focus, the combobox will lose focus and rollup
// before this function fires.
//
VOID CALLBACK nsWindow::HookTimerForPopups(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime)
{
  if (gHookTimerId != 0) {
    // if the window is NULL then we need to use the ID to kill the timer
    BOOL status = ::KillTimer(NULL, gHookTimerId);
    NS_ASSERTION(status, "Hook Timer was not killed.");
    gHookTimerId = 0;
  }

  if (gRollupMsgId != 0) {
    // Note: DealWithPopups does the check to make sure that
    // gRollupListener and gRollupWidget are not NULL
    LRESULT popupHandlingResult;
    nsAutoRollup autoRollup;
    DealWithPopups(gRollupMsgWnd, gRollupMsgId, 0, 0, &popupHandlingResult);
    gRollupMsgId = 0;
    gRollupMsgWnd = NULL;
  }
}
#endif // WinCE

static PRBool IsDifferentThreadWindow(HWND aWnd)
{
  return ::GetCurrentThreadId() != ::GetWindowThreadProcessId(aWnd, NULL);
}

//
// DealWithPopups
//
// Handle events that may cause a popup (combobox, XPMenu, etc) to need to rollup.
//

BOOL
nsWindow :: DealWithPopups ( HWND inWnd, UINT inMsg, WPARAM inWParam, LPARAM inLParam, LRESULT* outResult )
{
  if (gRollupListener && gRollupWidget && ::IsWindowVisible(inWnd)) {

    if (inMsg == WM_LBUTTONDOWN || inMsg == WM_RBUTTONDOWN || inMsg == WM_MBUTTONDOWN ||
        inMsg == WM_MOUSEWHEEL || inMsg == WM_MOUSEHWHEEL || inMsg == WM_ACTIVATE ||
        (inMsg == WM_KILLFOCUS && IsDifferentThreadWindow((HWND)inWParam))
#ifndef WINCE
        || 
        inMsg == WM_NCRBUTTONDOWN || 
        inMsg == WM_MOVING || 
        inMsg == WM_SIZING || 
        inMsg == WM_NCLBUTTONDOWN || 
        inMsg == WM_NCMBUTTONDOWN ||
        inMsg == WM_MOUSEACTIVATE ||
        inMsg == WM_ACTIVATEAPP ||
        inMsg == WM_MENUSELECT
#endif
        )
    {
      // Rollup if the event is outside the popup.
      PRBool rollup = !nsWindow::EventIsInsideWindow(inMsg, (nsWindow*)gRollupWidget);

      if (rollup && (inMsg == WM_MOUSEWHEEL || inMsg == WM_MOUSEHWHEEL))
      {
        gRollupListener->ShouldRollupOnMouseWheelEvent(&rollup);
        *outResult = PR_TRUE;
      }

      // If we're dealing with menus, we probably have submenus and we don't
      // want to rollup if the click is in a parent menu of the current submenu.
      if (rollup) {
        nsCOMPtr<nsIMenuRollup> menuRollup ( do_QueryInterface(gRollupListener) );
        if ( menuRollup ) {
          nsAutoTArray<nsIWidget*, 5> widgetChain;
          menuRollup->GetSubmenuWidgetChain ( &widgetChain );
          for ( PRUint32 i = 0; i < widgetChain.Length(); ++i ) {
            nsIWidget* widget = widgetChain[i];
            if ( nsWindow::EventIsInsideWindow(inMsg, (nsWindow*)widget) ) {
              rollup = PR_FALSE;
              break;
            }
          } // foreach parent menu widget
        } // if rollup listener knows about menus
      }

#ifndef WINCE
      if (inMsg == WM_MOUSEACTIVATE) {
        // 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.
        if (!rollup) {
          *outResult = MA_NOACTIVATE;
          return TRUE;
        }
        else
        {
          UINT uMsg = HIWORD(inLParam);
          if (uMsg == WM_MOUSEMOVE)
          {
            // WM_MOUSEACTIVATE cause by moving the mouse - X-mouse (eg. TweakUI)
            // must be enabled in Windows.
            gRollupListener->ShouldRollupOnMouseActivate(&rollup);
            if (!rollup)
            {
              *outResult = MA_NOACTIVATE;
              return true;
            }
          }
        }
      }
      // if we've still determined that we should still rollup everything, do it.
      else
#endif
      if ( rollup ) {
        // gRollupConsumeRollupEvent may be modified by
        // nsIRollupListener::Rollup.
        PRBool consumeRollupEvent = gRollupConsumeRollupEvent;
        // only need to deal with the last rollup for left mouse down events.
        gRollupListener->Rollup(inMsg == WM_LBUTTONDOWN ? &mLastRollup : nsnull);

        // Tell hook to stop processing messages
        gProcessHook = PR_FALSE;
        gRollupMsgId = 0;
        gRollupMsgWnd = NULL;

        // 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 (consumeRollupEvent && inMsg != WM_RBUTTONDOWN) {
          *outResult = TRUE;
          return TRUE;
        }
      }
    } // if event that might trigger a popup to rollup
  } // if rollup listeners registered

  return FALSE;
} // DealWithPopups



#ifdef ACCESSIBILITY
already_AddRefed<nsIAccessible> nsWindow::GetRootAccessible()
{
  nsWindow::gIsAccessibilityOn = TRUE;

  if (mIsDestroying || mOnDestroyCalled || mWindowType == eWindowType_invisible) {
    return nsnull;
  }

  nsIAccessible *rootAccessible = nsnull;

  // If accessibility is turned on, we create this even before it is requested
  // when the window gets focused. We need it to be created early so it can 
  // generate accessibility events right away
  nsWindow* accessibleWindow = nsnull;
  if (mContentType != eContentTypeInherit) {
    // We're on a MozillaContentWindowClass or MozillaUIWindowClass window.
    // Search for the correct visible child window to get an accessible 
    // document from. Make sure to use an active child window
    HWND accessibleWnd = ::GetTopWindow(mWnd);
    while (accessibleWnd) {
      // Loop through windows and find the first one with accessibility info
      accessibleWindow = GetNSWindowPtr(accessibleWnd);
      if (accessibleWindow) {
        accessibleWindow->DispatchAccessibleEvent(NS_GETACCESSIBLE, &rootAccessible);
        if (rootAccessible) {
          break;  // Success, one of the child windows was active
        }
      }
      accessibleWnd = ::GetNextWindow(accessibleWnd, GW_HWNDNEXT);
    }
  }
  else {
    DispatchAccessibleEvent(NS_GETACCESSIBLE, &rootAccessible);
  }
  return rootAccessible;
}

HINSTANCE nsWindow::gmAccLib = 0;
LPFNLRESULTFROMOBJECT nsWindow::gmLresultFromObject = 0;

STDMETHODIMP_(LRESULT) nsWindow::LresultFromObject(REFIID riid, WPARAM wParam, LPUNKNOWN pAcc)
{
  // open the dll dynamically
  if (!gmAccLib)
    gmAccLib =::LoadLibraryW(L"OLEACC.DLL");

  if (gmAccLib) {
    if (!gmLresultFromObject)
      gmLresultFromObject = (LPFNLRESULTFROMOBJECT)GetProcAddress(gmAccLib,"LresultFromObject");

    if (gmLresultFromObject)
      return gmLresultFromObject(riid,wParam,pAcc);
  }

  return 0;
}
#endif

#ifdef MOZ_XUL

nsWindow* nsWindow::GetTopLevelWindow(PRBool aStopOnDialogOrPopup)
{
  nsWindow* curWindow = this;

  while (PR_TRUE) {
    if (aStopOnDialogOrPopup) {
      switch (curWindow->mWindowType) {
        case eWindowType_dialog:
        case eWindowType_popup:
          return curWindow;
      }
    }

    // Retrieve the top level parent or owner window
    nsWindow* parentWindow = curWindow->GetParentWindow(PR_TRUE);

    if (!parentWindow)
      return curWindow;

    curWindow = parentWindow;
  }
}

gfxASurface *nsWindow::GetThebesSurface()
{
  if (mPaintDC)
    return (new gfxWindowsSurface(mPaintDC));

  return (new gfxWindowsSurface(mWnd));
}

void nsWindow::ResizeTranslucentWindow(PRInt32 aNewWidth, PRInt32 aNewHeight, PRBool force)
{
  if (!force && aNewWidth == mBounds.width && aNewHeight == mBounds.height)
    return;

  mTransparentSurface = new gfxWindowsSurface(gfxIntSize(aNewWidth, aNewHeight), gfxASurface::ImageFormatARGB32);
  mMemoryDC = mTransparentSurface->GetDC();
}

nsTransparencyMode nsWindow::GetTransparencyMode()
{
  return GetTopLevelWindow(PR_TRUE)->GetWindowTranslucencyInner();
}

void nsWindow::SetTransparencyMode(nsTransparencyMode aMode)
{
  GetTopLevelWindow(PR_TRUE)->SetWindowTranslucencyInner(aMode);
}

void nsWindow::SetWindowTranslucencyInner(nsTransparencyMode aMode)
{
#ifndef WINCE

  if (aMode == mTransparencyMode)
    return;

  HWND hWnd = GetTopLevelHWND(mWnd, PR_TRUE);
  nsWindow* topWindow = GetNSWindowPtr(hWnd);

  if (!topWindow)
  {
    NS_WARNING("Trying to use transparent chrome in an embedded context");
    return;
  }

  LONG_PTR style = 0, exStyle = 0;
  switch(aMode) {
    case eTransparencyTransparent:
      exStyle |= WS_EX_LAYERED;
    case eTransparencyOpaque:
    case eTransparencyGlass:
      topWindow->mTransparencyMode = aMode;
      break;
  }

  style |= topWindow->WindowStyle();
  exStyle |= topWindow->WindowExStyle();

  if (aMode == eTransparencyTransparent) {
    style &= ~(WS_CAPTION | WS_THICKFRAME | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX);
    exStyle &= ~(WS_EX_DLGMODALFRAME | WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE);
  }

  VERIFY_WINDOW_STYLE(style);
  ::SetWindowLongPtrW(hWnd, GWL_STYLE, style);
  ::SetWindowLongPtrW(hWnd, GWL_EXSTYLE, exStyle);

  mTransparencyMode = aMode;

  SetupTranslucentWindowMemoryBitmap(aMode);
  MARGINS margins = { 0, 0, 0, 0 };
  if(eTransparencyGlass == aMode)
    margins.cxLeftWidth = -1;
  if(nsUXThemeData::sHaveCompositor)
    nsUXThemeData::dwmExtendFrameIntoClientAreaPtr(hWnd, &margins);
#endif
}

void nsWindow::SetupTranslucentWindowMemoryBitmap(nsTransparencyMode aMode)
{
  if (eTransparencyTransparent == aMode) {
    ResizeTranslucentWindow(mBounds.width, mBounds.height, PR_TRUE);
  } else {
    mTransparentSurface = nsnull;
    mMemoryDC = NULL;
  }
}

nsresult nsWindow::UpdateTranslucentWindow()
{
#ifndef WINCE
  if (mBounds.IsEmpty())
    return NS_OK;

  ::GdiFlush();

  BLENDFUNCTION bf = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA };
  SIZE winSize = { mBounds.width, mBounds.height };
  POINT srcPos = { 0, 0 };
  HWND hWnd = GetTopLevelHWND(mWnd, PR_TRUE);
  RECT winRect;
  ::GetWindowRect(hWnd, &winRect);

  // perform the alpha blend
  if (!::UpdateLayeredWindow(hWnd, NULL, (POINT*)&winRect, &winSize, mMemoryDC, &srcPos, 0, &bf, ULW_ALPHA))
    return NS_ERROR_FAILURE;
#endif

  return NS_OK;
}

#endif //MOZ_XUL