gecko/widget/src/gtk2/nsWindow.cpp

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
 */
/* ***** 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 Christopher Blizzard
 * <blizzard@mozilla.org>.  Portions created by the Initial Developer
 * are Copyright (C) 2001 the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Mats Palmgren <mats.palmgren@bredband.net>
 *   Masayuki Nakano <masayuki@d-toybox.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the 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 "prlink.h"

#include "nsWindow.h"
#include "nsGTKToolkit.h"
#include "nsIDeviceContext.h"
#include "nsIRenderingContext.h"
#include "nsIRegion.h"
#include "nsIRollupListener.h"
#include "nsIMenuRollup.h"
#include "nsIDOMNode.h"

#include "nsWidgetsCID.h"
#include "nsIDragService.h"
#include "nsIDragSessionGTK.h"

#include "nsGtkKeyUtils.h"
#include "nsGtkCursors.h"

#include <gtk/gtkwindow.h>
#include <gdk/gdkx.h>
#include <gdk/gdkkeysyms.h>

#ifdef MOZ_ENABLE_STARTUP_NOTIFICATION
#define SN_API_NOT_YET_FROZEN
#include <startup-notification-1.0/libsn/sn.h>
#endif

#include "gtk2xtbin.h"

#include "nsIPrefService.h"
#include "nsIPrefBranch.h"
#include "nsIServiceManager.h"
#include "nsIStringBundle.h"
#include "nsGfxCIID.h"

#ifdef ACCESSIBILITY
#include "nsIAccessibleRole.h"
#include "nsPIAccessNode.h"
#include "nsPIAccessible.h"
#include "nsIAccessibleEvent.h"
#include "prenv.h"
#include "stdlib.h"
static PRBool sAccessibilityChecked = PR_FALSE;
/* static */
PRBool nsWindow::sAccessibilityEnabled = PR_FALSE;
static const char sSysPrefService [] = "@mozilla.org/system-preference-service;1";
static const char sAccEnv [] = "GNOME_ACCESSIBILITY";
static const char sAccessibilityKey [] = "config.use_system_prefs.accessibility";
#endif

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

/* SetCursor(imgIContainer*) */
#include <gdk/gdk.h>
#include "imgIContainer.h"
#include "gfxIImageFrame.h"
#include "nsGfxCIID.h"
#include "nsIImage.h"
#include "nsImageToPixbuf.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsAutoPtr.h"

#include "gfxPlatformGtk.h"
#include "gfxXlibSurface.h"
#include "gfxContext.h"
#include "gfxImageSurface.h"

#ifdef MOZ_ENABLE_GLITZ
#include "gfxGlitzSurface.h"
#include "glitz-glx.h"
#endif

/* For PrepareNativeWidget */
static NS_DEFINE_IID(kDeviceContextCID, NS_DEVICE_CONTEXT_CID);

/* utility functions */
static PRBool     check_for_rollup(GdkWindow *aWindow,
                                   gdouble aMouseX, gdouble aMouseY,
                                   PRBool aIsWheel);
static PRBool     is_mouse_in_window(GdkWindow* aWindow,
                                     gdouble aMouseX, gdouble aMouseY);
static nsWindow  *get_window_for_gtk_widget(GtkWidget *widget);
static nsWindow  *get_window_for_gdk_window(GdkWindow *window);
static nsWindow  *get_owning_window_for_gdk_window(GdkWindow *window);
static GtkWidget *get_gtk_widget_for_gdk_window(GdkWindow *window);
static GdkCursor *get_gtk_cursor(nsCursor aCursor);

static GdkWindow *get_inner_gdk_window (GdkWindow *aWindow,
                                        gint x, gint y,
                                        gint *retx, gint *rety);

static inline PRBool is_context_menu_key(const nsKeyEvent& inKeyEvent);
static void   key_event_to_context_menu_event(const nsKeyEvent* inKeyEvent,
                                              nsMouseEvent* outCMEvent);

static int    is_parent_ungrab_enter(GdkEventCrossing *aEvent);
static int    is_parent_grab_leave(GdkEventCrossing *aEvent);

/* callbacks from widgets */
static gboolean expose_event_cb           (GtkWidget *widget,
                                           GdkEventExpose *event);
static gboolean configure_event_cb        (GtkWidget *widget,
                                           GdkEventConfigure *event);
static void     size_allocate_cb          (GtkWidget *widget,
                                           GtkAllocation *allocation);
static gboolean delete_event_cb           (GtkWidget *widget,
                                           GdkEventAny *event);
static gboolean enter_notify_event_cb     (GtkWidget *widget,
                                           GdkEventCrossing *event);
static gboolean leave_notify_event_cb     (GtkWidget *widget,
                                           GdkEventCrossing *event);
static gboolean motion_notify_event_cb    (GtkWidget *widget,
                                           GdkEventMotion *event);
static gboolean button_press_event_cb     (GtkWidget *widget,
                                           GdkEventButton *event);
static gboolean button_release_event_cb   (GtkWidget *widget,
                                           GdkEventButton *event);
static gboolean focus_in_event_cb         (GtkWidget *widget,
                                           GdkEventFocus *event);
static gboolean focus_out_event_cb        (GtkWidget *widget,
                                           GdkEventFocus *event);
static gboolean key_press_event_cb        (GtkWidget *widget,
                                           GdkEventKey *event);
static gboolean key_release_event_cb      (GtkWidget *widget,
                                           GdkEventKey *event);
static gboolean scroll_event_cb           (GtkWidget *widget,
                                           GdkEventScroll *event);
static gboolean visibility_notify_event_cb(GtkWidget *widget,
                                           GdkEventVisibility *event);
static gboolean window_state_event_cb     (GtkWidget *widget,
                                           GdkEventWindowState *event);
static void     theme_changed_cb          (GtkSettings *settings,
                                           GParamSpec *pspec,
                                           nsWindow *data);
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
static GdkFilterReturn plugin_window_filter_func (GdkXEvent *gdk_xevent,
                                                  GdkEvent *event,
                                                  gpointer data);
static GdkFilterReturn plugin_client_message_filter (GdkXEvent *xevent,
                                                     GdkEvent *event,
                                                     gpointer data);
#ifdef __cplusplus
}
#endif /* __cplusplus */

static gboolean drag_motion_event_cb      (GtkWidget *aWidget,
                                           GdkDragContext *aDragContext,
                                           gint aX,
                                           gint aY,
                                           guint aTime,
                                           gpointer aData);
static void     drag_leave_event_cb       (GtkWidget *aWidget,
                                           GdkDragContext *aDragContext,
                                           guint aTime,
                                           gpointer aData);
static gboolean drag_drop_event_cb        (GtkWidget *aWidget,
                                           GdkDragContext *aDragContext,
                                           gint aX,
                                           gint aY,
                                           guint aTime,
                                           gpointer *aData);
static void    drag_data_received_event_cb(GtkWidget *aWidget,
                                           GdkDragContext *aDragContext,
                                           gint aX,
                                           gint aY,
                                           GtkSelectionData  *aSelectionData,
                                           guint aInfo,
                                           guint32 aTime,
                                           gpointer aData);

static GdkModifierType gdk_keyboard_get_modifiers();
static PRBool gdk_keyboard_get_modmap_masks(Display*  aDisplay,
                                            PRUint32* aCapsLockMask,
                                            PRUint32* aNumLockMask,
                                            PRUint32* aScrollLockMask);

/* initialization static functions */
static nsresult    initialize_prefs        (void);

// this is the last window that had a drag event happen on it.
nsWindow *nsWindow::mLastDragMotionWindow = NULL;
PRBool nsWindow::sIsDraggingOutOf = PR_FALSE;

// This is the time of the last button press event.  The drag service
// uses it as the time to start drags.
guint32   nsWindow::mLastButtonPressTime = 0;
// Time of the last button release event. We use it to detect when the
// drag ended before we could properly setup drag and drop.
guint32   nsWindow::mLastButtonReleaseTime = 0;

static NS_DEFINE_IID(kCDragServiceCID,  NS_DRAGSERVICE_CID);

// the current focus window
static nsWindow         *gFocusWindow          = NULL;
static PRBool            gGlobalsInitialized   = PR_FALSE;
static PRBool            gRaiseWindows         = PR_TRUE;
static nsWindow         *gPluginFocusWindow    = NULL;

nsCOMPtr  <nsIRollupListener> gRollupListener;
nsWeakPtr                     gRollupWindow;

#define NS_WINDOW_TITLE_MAX_LENGTH 4095

#ifdef USE_XIM

static nsWindow    *gIMEFocusWindow = NULL;
static GdkEventKey *gKeyEvent = NULL;
static PRBool       gKeyEventCommitted = PR_FALSE;
static PRBool       gKeyEventChanged = PR_FALSE;
static PRBool       gIMESuppressCommit = PR_FALSE;

static void IM_commit_cb              (GtkIMContext *aContext,
                                       const gchar *aString,
                                       nsWindow *aWindow);
static void IM_commit_cb_internal     (const gchar *aString,
                                       nsWindow *aWindow);
static void IM_preedit_changed_cb     (GtkIMContext *aContext,
                                       nsWindow *aWindow);
static void IM_set_text_range         (const PRInt32 aLen,
                                       const gchar *aPreeditString,
                                       const gint aCursorPos,
                                       const PangoAttrList *aFeedback,
                                       PRUint32 *aTextRangeListLengthResult,
                                       nsTextRangeArray *aTextRangeListResult);

static nsWindow *IM_get_owning_window(MozDrawingarea *aArea);

static GtkIMContext *IM_get_input_context(nsWindow *window);

// If after selecting profile window, the startup fail, please refer to
// http://bugzilla.gnome.org/show_bug.cgi?id=88940
#endif

// needed for imgIContainer cursors
// GdkDisplay* was added in 2.2
typedef struct _GdkDisplay GdkDisplay;
typedef GdkDisplay* (*_gdk_display_get_default_fn)(void);

typedef GdkCursor*  (*_gdk_cursor_new_from_pixbuf_fn)(GdkDisplay *display,
                                                      GdkPixbuf *pixbuf,
                                                      gint x,
                                                      gint y);
static _gdk_display_get_default_fn    _gdk_display_get_default;
static _gdk_cursor_new_from_pixbuf_fn _gdk_cursor_new_from_pixbuf;
static PRBool sPixbufCursorChecked;

// needed for GetAttention calls
// gdk_window_set_urgency_hint was added in 2.8
typedef void (*_gdk_window_set_urgency_hint_fn)(GdkWindow *window,
                                                gboolean urgency);

#define kWindowPositionSlop 20

// cursor cache
static GdkCursor *gCursorCache[eCursorCount];

nsWindow::nsWindow()
{
    mContainer           = nsnull;
    mDrawingarea         = nsnull;
    mShell               = nsnull;
    mWindowGroup         = nsnull;
    mContainerGotFocus   = PR_FALSE;
    mContainerLostFocus  = PR_FALSE;
    mContainerBlockFocus = PR_FALSE;
    mIsVisible           = PR_FALSE;
    mRetryPointerGrab    = PR_FALSE;
    mRetryKeyboardGrab   = PR_FALSE;
    mActivatePending     = PR_FALSE;
    mTransientParent     = nsnull;
    mWindowType          = eWindowType_child;
    mSizeState           = nsSizeMode_Normal;
    mOldFocusWindow      = 0;
    mPluginType          = PluginType_NONE;

    if (!gGlobalsInitialized) {
        gGlobalsInitialized = PR_TRUE;

        // It's OK if either of these fail, but it may not be one day.
        initialize_prefs();
    }

    memset(mKeyDownFlags, 0, sizeof(mKeyDownFlags));

    if (mLastDragMotionWindow == this)
        mLastDragMotionWindow = NULL;
    mDragMotionWidget = 0;
    mDragMotionContext = 0;
    mDragMotionX = 0;
    mDragMotionY = 0;
    mDragMotionTime = 0;
    mDragMotionTimerID = 0;

#ifdef USE_XIM
    mIMEData = nsnull;
#endif

#ifdef ACCESSIBILITY
    mRootAccessible  = nsnull;
#endif

    mIsTranslucent = PR_FALSE;
    mTransparencyBitmap = nsnull;

    mTransparencyBitmapWidth  = 0;
    mTransparencyBitmapHeight = 0;
}

nsWindow::~nsWindow()
{
    LOG(("nsWindow::~nsWindow() [%p]\n", (void *)this));
    if (mLastDragMotionWindow == this) {
        mLastDragMotionWindow = NULL;
    }

    delete[] mTransparencyBitmap;
    mTransparencyBitmap = nsnull;

    Destroy();
}

/* static */ void
nsWindow::ReleaseGlobals()
{
  for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(gCursorCache); ++i) {
    if (gCursorCache[i]) {
      gdk_cursor_unref(gCursorCache[i]);
      gCursorCache[i] = nsnull;
    }
  }
}

#ifndef USE_XIM
NS_IMPL_ISUPPORTS_INHERITED1(nsWindow, nsCommonWidget,
                             nsISupportsWeakReference)
#else
NS_IMPL_ISUPPORTS_INHERITED2(nsWindow, nsCommonWidget,
                             nsISupportsWeakReference,
                             nsIKBStateControl)
#endif

NS_IMETHODIMP
nsWindow::Create(nsIWidget        *aParent,
                 const nsRect     &aRect,
                 EVENT_CALLBACK   aHandleEventFunction,
                 nsIDeviceContext *aContext,
                 nsIAppShell      *aAppShell,
                 nsIToolkit       *aToolkit,
                 nsWidgetInitData *aInitData)
{
    nsresult rv = NativeCreate(aParent, nsnull, aRect, aHandleEventFunction,
                               aContext, aAppShell, aToolkit, aInitData);
    return rv;
}

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

NS_IMETHODIMP
nsWindow::Destroy(void)
{
    if (mIsDestroyed || !mCreated)
        return NS_OK;

    LOG(("nsWindow::Destroy [%p]\n", (void *)this));
    mIsDestroyed = PR_TRUE;
    mCreated = PR_FALSE;
    
    g_signal_handlers_disconnect_by_func(gtk_settings_get_default(),
                                         (gpointer)G_CALLBACK(theme_changed_cb),
                                         this);

    // ungrab if required
    nsCOMPtr<nsIWidget> rollupWidget = do_QueryReferent(gRollupWindow);
    if (static_cast<nsIWidget *>(this) == rollupWidget.get()) {
        if (gRollupListener)
            gRollupListener->Rollup();
        gRollupWindow = nsnull;
        gRollupListener = nsnull;
    }

    NativeShow(PR_FALSE);

    // walk the list of children and call destroy on them.  Have to be
    // careful, though -- calling destroy on a kid may actually remove
    // it from our child list, losing its sibling links.
    for (nsIWidget* kid = mFirstChild; kid; ) {
        nsIWidget* next = kid->GetNextSibling();
        kid->Destroy();
        kid = next;
    }

#ifdef USE_XIM
    IMEDestroyContext();
#endif

    // make sure that we remove ourself as the focus window
    if (gFocusWindow == this) {
        LOGFOCUS(("automatically losing focus...\n"));
        gFocusWindow = nsnull;
    }

    // make sure that we remove ourself as the plugin focus window
    if (gPluginFocusWindow == this) {
        gPluginFocusWindow->LoseNonXEmbedPluginFocus();
    }

    if (mWindowGroup) {
        g_object_unref(G_OBJECT(mWindowGroup));
        mWindowGroup = nsnull;
    }

    // Destroy thebes surface now. Badness can happen if we destroy
    // the surface after its X Window.
    mThebesSurface = nsnull;

    if (mDragMotionTimerID) {
        gtk_timeout_remove(mDragMotionTimerID);
        mDragMotionTimerID = 0;
    }

    if (mShell) {
        gtk_widget_destroy(mShell);
        mShell = nsnull;
        mContainer = nsnull;
    }
    else if (mContainer) {
        gtk_widget_destroy(GTK_WIDGET(mContainer));
        mContainer = nsnull;
    }

    if (mDrawingarea) {
        g_object_unref(mDrawingarea);
        mDrawingarea = nsnull;
    }

    OnDestroy();

#ifdef ACCESSIBILITY
    if (mRootAccessible) {
        mRootAccessible = nsnull;
    }
#endif

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::SetParent(nsIWidget *aNewParent)
{
    NS_ENSURE_ARG_POINTER(aNewParent);

    GdkWindow* newParentWindow =
        static_cast<GdkWindow*>(aNewParent->GetNativeData(NS_NATIVE_WINDOW));
    NS_ASSERTION(newParentWindow, "Parent widget has a null native window handle");

    if (!mShell && mDrawingarea) {
        moz_drawingarea_reparent(mDrawingarea, newParentWindow);
    } else {
        NS_NOTREACHED("nsWindow::SetParent - reparenting a non-child window");
    }
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::SetModal(PRBool aModal)
{
    LOG(("nsWindow::SetModal [%p] %d\n", (void *)this, aModal));

    // find the toplevel window and add it to the grab list
    GtkWidget *grabWidget = nsnull;

    GetToplevelWidget(&grabWidget);

    if (!grabWidget)
        return NS_ERROR_FAILURE;

    if (aModal)
        gtk_grab_add(grabWidget);
    else
        gtk_grab_remove(grabWidget);

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::IsVisible(PRBool & aState)
{
    aState = mIsVisible;
    if (mIsTopLevel && mShell) {
        aState = GTK_WIDGET_VISIBLE(mShell);
    }
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::ConstrainPosition(PRBool aAllowSlop, PRInt32 *aX, PRInt32 *aY)
{
    if (mIsTopLevel && mShell) {
        PRInt32 screenWidth = gdk_screen_width();
        PRInt32 screenHeight = gdk_screen_height();
        if (aAllowSlop) {
            if (*aX < (kWindowPositionSlop - mBounds.width))
                *aX = kWindowPositionSlop - mBounds.width;
            if (*aX > (screenWidth - kWindowPositionSlop))
                *aX = screenWidth - kWindowPositionSlop;
            if (*aY < (kWindowPositionSlop - mBounds.height))
                *aY = kWindowPositionSlop - mBounds.height;
            if (*aY > (screenHeight - kWindowPositionSlop))
                *aY = screenHeight - kWindowPositionSlop;
        } else {
            if (*aX < 0)
                *aX = 0;
            if (*aX > (screenWidth - mBounds.width))
                *aX = screenWidth - mBounds.width;
            if (*aY < 0)
                *aY = 0;
            if (*aY > (screenHeight - mBounds.height))
                *aY = screenHeight - mBounds.height;
        }
    }
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::Move(PRInt32 aX, PRInt32 aY)
{
    LOG(("nsWindow::Move [%p] %d %d\n", (void *)this,
         aX, aY));

    mPlaced = PR_TRUE;

    // Since a popup window's x/y coordinates are in relation to to
    // the parent, the parent might have moved so we always move a
    // popup window.
    if (aX == mBounds.x && aY == mBounds.y &&
        mWindowType != eWindowType_popup)
        return NS_OK;

    // XXX Should we do some AreBoundsSane check here?

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

    if (!mCreated)
        return NS_OK;

    if (mIsTopLevel) {
        if (mParent && mWindowType == eWindowType_popup) {
            nsRect oldrect, newrect;
            oldrect.x = aX;
            oldrect.y = aY;
            mParent->WidgetToScreen(oldrect, newrect);
            gtk_window_move(GTK_WINDOW(mShell), newrect.x, newrect.y);
        }
        else {
            gtk_window_move(GTK_WINDOW(mShell), aX, aY);
        }
    }
    else if (mDrawingarea) {
        moz_drawingarea_move(mDrawingarea, aX, aY);
    }

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::PlaceBehind(nsTopLevelWidgetZPlacement  aPlacement,
                      nsIWidget                  *aWidget,
                      PRBool                      aActivate)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::SetZIndex(PRInt32 aZIndex)
{
    nsIWidget* oldPrev = GetPrevSibling();

    nsBaseWidget::SetZIndex(aZIndex);

    if (GetPrevSibling() == oldPrev) {
        return NS_OK;
    }

    NS_ASSERTION(!mContainer, "Expected Mozilla child widget");

    // We skip the nsWindows that don't have mDrawingareas.
    // These are probably in the process of being destroyed.

    if (!GetNextSibling()) {
        // We're to be on top.
        if (mDrawingarea)
            gdk_window_raise(mDrawingarea->clip_window);
    } else {
        // All the siblings before us need to be below our widget. 
        for (nsWindow* w = this; w;
             w = static_cast<nsWindow*>(w->GetPrevSibling())) {
            if (w->mDrawingarea)
                gdk_window_lower(w->mDrawingarea->clip_window);
        }
    }
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::SetSizeMode(PRInt32 aMode)
{
    nsresult rv;

    LOG(("nsWindow::SetSizeMode [%p] %d\n", (void *)this, aMode));

    // Save the requested state.
    rv = nsBaseWidget::SetSizeMode(aMode);

    // return if there's no shell or our current state is the same as
    // the mode we were just set to.
    if (!mShell || mSizeState == mSizeMode) {
        return rv;
    }

    switch (aMode) {
    case nsSizeMode_Maximized:
        gtk_window_maximize(GTK_WINDOW(mShell));
        break;
    case nsSizeMode_Minimized:
        gtk_window_iconify(GTK_WINDOW(mShell));
        break;
    default:
        // nsSizeMode_Normal, really.
        if (mSizeState == nsSizeMode_Minimized)
            gtk_window_deiconify(GTK_WINDOW(mShell));
        else if (mSizeState == nsSizeMode_Maximized)
            gtk_window_unmaximize(GTK_WINDOW(mShell));
        break;
    }

    mSizeState = mSizeMode;

    return rv;
}

NS_IMETHODIMP
nsWindow::Enable(PRBool aState)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

typedef void (* SetUserTimeFunc)(GdkWindow* aWindow, guint32 aTimestamp);

// This will become obsolete when new GTK APIs are widely supported,
// as described here: http://bugzilla.gnome.org/show_bug.cgi?id=347375
static void
SetUserTimeAndStartupIDForActivatedWindow(GtkWidget* aWindow)
{
    nsCOMPtr<nsIToolkit> toolkit;
    NS_GetCurrentToolkit(getter_AddRefs(toolkit));
    if (!toolkit)
        return;

    nsGTKToolkit* GTKToolkit = static_cast<nsGTKToolkit*>
                                          (static_cast<nsIToolkit*>(toolkit));
    nsCAutoString desktopStartupID;
    GTKToolkit->GetDesktopStartupID(&desktopStartupID);
    if (desktopStartupID.IsEmpty()) {
        // We don't have the data we need. Fall back to an
        // approximation ... using the timestamp of the remote command
        // being received as a guess for the timestamp of the user event
        // that triggered it.
        PRUint32 timestamp = GTKToolkit->GetFocusTimestamp();
        if (timestamp) {
            gdk_window_focus(aWindow->window, timestamp);
            GTKToolkit->SetFocusTimestamp(0);
        }
        return;
    }
 
#ifdef MOZ_ENABLE_STARTUP_NOTIFICATION
    GdkDrawable* drawable = GDK_DRAWABLE(aWindow->window);
    GtkWindow* win = GTK_WINDOW(aWindow);
    if (!win) {
        NS_WARNING("Passed in widget was not a GdkWindow!");
        return;
    }
    GdkScreen* screen = gtk_window_get_screen(win);
    SnDisplay* snd =
        sn_display_new(gdk_x11_drawable_get_xdisplay(drawable), nsnull, nsnull);
    if (!snd)
        return;
    SnLauncheeContext* ctx =
        sn_launchee_context_new(snd, gdk_screen_get_number(screen),
                                desktopStartupID.get());
    if (!ctx) {
        sn_display_unref(snd);
        return;
    }

    if (sn_launchee_context_get_id_has_timestamp(ctx)) {
        PRLibrary* gtkLibrary;
        SetUserTimeFunc setUserTimeFunc = (SetUserTimeFunc)
            PR_FindFunctionSymbolAndLibrary("gdk_x11_window_set_user_time", &gtkLibrary);
        if (setUserTimeFunc) {
            setUserTimeFunc(aWindow->window, sn_launchee_context_get_timestamp(ctx));
            PR_UnloadLibrary(gtkLibrary);
        }
    }

    sn_launchee_context_setup_window(ctx, gdk_x11_drawable_get_xid(drawable));
    sn_launchee_context_complete(ctx);

    sn_launchee_context_unref(ctx);
    sn_display_unref(snd);
#endif
 
    GTKToolkit->SetDesktopStartupID(EmptyCString());
} 

NS_IMETHODIMP
nsWindow::SetFocus(PRBool aRaise)
{
    // Make sure that our owning widget has focus.  If it doesn't try to
    // grab it.  Note that we don't set our focus flag in this case.

    LOGFOCUS(("  SetFocus [%p]\n", (void *)this));

    if (!mDrawingarea)
        return NS_ERROR_FAILURE;

    GtkWidget *owningWidget =
        get_gtk_widget_for_gdk_window(mDrawingarea->inner_window);
    if (!owningWidget)
        return NS_ERROR_FAILURE;

    // Raise the window if someone passed in PR_TRUE and the prefs are
    // set properly.
    GtkWidget *toplevelWidget = gtk_widget_get_toplevel(owningWidget);

    if (gRaiseWindows && aRaise && toplevelWidget &&
        !GTK_WIDGET_HAS_FOCUS(owningWidget) &&
        !GTK_WIDGET_HAS_FOCUS(toplevelWidget)) {
        GtkWidget* top_window = nsnull;
        GetToplevelWidget(&top_window);
        if (top_window && (GTK_WIDGET_VISIBLE(top_window)))
        {
            gdk_window_show_unraised(top_window->window);
            // Unset the urgency hint if possible.
            SetUrgencyHint(top_window, PR_FALSE);
        }
    }

    nsRefPtr<nsWindow> owningWindow = get_window_for_gtk_widget(owningWidget);
    if (!owningWindow)
        return NS_ERROR_FAILURE;

    if (!GTK_WIDGET_HAS_FOCUS(owningWidget)) {
        LOGFOCUS(("  grabbing focus for the toplevel [%p]\n", (void *)this));
        owningWindow->mContainerBlockFocus = PR_TRUE;
        
        // Set focus to the window
        if (gRaiseWindows && aRaise && toplevelWidget &&
            !GTK_WIDGET_HAS_FOCUS(toplevelWidget) &&
            owningWindow->mIsShown && GTK_IS_WINDOW(owningWindow->mShell))
          gtk_window_present(GTK_WINDOW(owningWindow->mShell));
        
        gtk_widget_grab_focus(owningWidget);
        owningWindow->mContainerBlockFocus = PR_FALSE;

        DispatchGotFocusEvent();

        // unset the activate flag
        if (owningWindow->mActivatePending) {
            owningWindow->mActivatePending = PR_FALSE;
            DispatchActivateEvent();
        }

        return NS_OK;
    }

    // If this is the widget that already has focus, return.
    if (gFocusWindow == this) {
        LOGFOCUS(("  already have focus [%p]\n", (void *)this));
        return NS_OK;
    }

    // If there is already a focused child window, dispatch a LOSTFOCUS
    // event from that widget and unset its got focus flag.
    if (gFocusWindow) {
        nsRefPtr<nsWindow> kungFuDeathGrip = gFocusWindow;
#ifdef USE_XIM
        // If the focus window and this window share the same input
        // context we don't have to change the focus of the IME
        // context
        if (IM_get_input_context(this) !=
            IM_get_input_context(gFocusWindow))
            gFocusWindow->IMELoseFocus();
#endif
        gFocusWindow->LoseFocus();
    }

    // Set this window to be the focused child window, update our has
    // focus flag and dispatch a GOTFOCUS event.
    gFocusWindow = this;

#ifdef USE_XIM
    IMESetFocus();
#endif

    LOGFOCUS(("  widget now has focus - dispatching events [%p]\n",
              (void *)this));

    DispatchGotFocusEvent();

    // unset the activate flag
    if (owningWindow->mActivatePending) {
        owningWindow->mActivatePending = PR_FALSE;
        DispatchActivateEvent();
    }

    LOGFOCUS(("  done dispatching events in SetFocus() [%p]\n",
              (void *)this));

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::GetScreenBounds(nsRect &aRect)
{
    nsRect origin(0, 0, mBounds.width, mBounds.height);
    WidgetToScreen(origin, aRect);
    LOG(("GetScreenBounds %d %d | %d %d | %d %d\n",
         aRect.x, aRect.y,
         mBounds.width, mBounds.height,
         aRect.width, aRect.height));
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::SetForegroundColor(const nscolor &aColor)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::SetBackgroundColor(const nscolor &aColor)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::SetCursor(nsCursor aCursor)
{
    // if we're not the toplevel window pass up the cursor request to
    // the toplevel window to handle it.
    if (!mContainer && mDrawingarea) {
        GtkWidget *widget =
            get_gtk_widget_for_gdk_window(mDrawingarea->inner_window);
        nsWindow *window = get_window_for_gtk_widget(widget);
        return window->SetCursor(aCursor);
    }

    // Only change cursor if it's actually been changed
    if (aCursor != mCursor) {
        GdkCursor *newCursor = NULL;

        newCursor = get_gtk_cursor(aCursor);

        if (nsnull != newCursor) {
            mCursor = aCursor;

            if (!mContainer)
                return NS_OK;

            gdk_window_set_cursor(GTK_WIDGET(mContainer)->window, newCursor);
        }
    }

    return NS_OK;
}


static
PRUint8* Data32BitTo1Bit(PRUint8* aImageData,
                         PRUint32 aImageBytesPerRow,
                         PRUint32 aWidth, PRUint32 aHeight)
{
  PRUint32 outBpr = (aWidth + 7) / 8;
  
  PRUint8* outData = new PRUint8[outBpr * aHeight];
  if (!outData)
      return NULL;

  PRUint8 *outRow = outData,
          *imageRow = aImageData;

  for (PRUint32 curRow = 0; curRow < aHeight; curRow++) {
      PRUint8 *irow = imageRow;
      PRUint8 *orow = outRow;
      PRUint8 imagePixels = 0;
      PRUint8 offset = 0;

      for (PRUint32 curCol = 0; curCol < aWidth; curCol++) {
          PRUint8 r = *imageRow++,
                  g = *imageRow++,
                  b = *imageRow++;
               /* a = * */imageRow++;

          if ((r + b + g) < 3 * 128)
              imagePixels |= (1 << offset);

          if (offset == 7) {
              *outRow++ = imagePixels;
              offset = 0;
              imagePixels = 0;
          } else {
              offset++;
          }
      }
      if (offset != 0)
          *outRow++ = imagePixels;

      imageRow = irow + aImageBytesPerRow;
      outRow = orow + outBpr;
  }

  return outData;
}



NS_IMETHODIMP
nsWindow::SetCursor(imgIContainer* aCursor,
                    PRUint32 aHotspotX, PRUint32 aHotspotY)
{
    // if we're not the toplevel window pass up the cursor request to
    // the toplevel window to handle it.
    if (!mContainer && mDrawingarea) {
        GtkWidget *widget =
            get_gtk_widget_for_gdk_window(mDrawingarea->inner_window);
        nsWindow *window = get_window_for_gtk_widget(widget);
        return window->SetCursor(aCursor, aHotspotX, aHotspotY);
    }

    if (!sPixbufCursorChecked) {
        PRLibrary* lib;
        _gdk_cursor_new_from_pixbuf = (_gdk_cursor_new_from_pixbuf_fn)
            PR_FindFunctionSymbolAndLibrary("gdk_cursor_new_from_pixbuf", &lib);
        if (lib) {
            // We already link against GDK, so we can unload it.
            PR_UnloadLibrary(lib);
            lib = nsnull;
        }
        _gdk_display_get_default = (_gdk_display_get_default_fn)
            PR_FindFunctionSymbolAndLibrary("gdk_display_get_default", &lib);
        if (lib) {
            // We already link against GDK, so we can unload it.
            PR_UnloadLibrary(lib);
            lib = nsnull;
        }
        sPixbufCursorChecked = PR_TRUE;
    }
    mCursor = nsCursor(-1);

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

    nsCOMPtr<nsIImage> img(do_GetInterface(frame));
    if (!img)
        return NS_ERROR_NOT_AVAILABLE;

    GdkPixbuf* pixbuf = nsImageToPixbuf::ImageToPixbuf(img);
    if (!pixbuf)
        return NS_ERROR_NOT_AVAILABLE;

    int width = gdk_pixbuf_get_width(pixbuf);
    int height = gdk_pixbuf_get_height(pixbuf);
    // Reject cursors greater than 128 pixels in some 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;

    // Looks like all cursors need an alpha channel (tested on Gtk 2.4.4). This
    // is of course not documented anywhere...
    // So add one if there isn't one yet
    if (!gdk_pixbuf_get_has_alpha(pixbuf)) {
        GdkPixbuf* alphaBuf = gdk_pixbuf_add_alpha(pixbuf, FALSE, 0, 0, 0);
        gdk_pixbuf_unref(pixbuf);
        if (!alphaBuf) {
            return NS_ERROR_OUT_OF_MEMORY;
        }
        pixbuf = alphaBuf;
    }

    GdkCursor* cursor;
    if (!_gdk_cursor_new_from_pixbuf || !_gdk_display_get_default) {
        // Fallback to a monochrome cursor
        GdkPixmap* mask = gdk_pixmap_new(NULL, width, height, 1);
        if (!mask)
            return NS_ERROR_OUT_OF_MEMORY;

        PRUint8* data = Data32BitTo1Bit(gdk_pixbuf_get_pixels(pixbuf),
                                        gdk_pixbuf_get_rowstride(pixbuf),
                                        width, height);
        if (!data) {
            g_object_unref(mask);
            return NS_ERROR_OUT_OF_MEMORY;
        }

        GdkPixmap* image = gdk_bitmap_create_from_data(NULL, (const gchar*)data, width,
                                                       height);
        delete[] data;
        if (!image) {
            g_object_unref(mask);
            return NS_ERROR_OUT_OF_MEMORY;
        }

        gdk_pixbuf_render_threshold_alpha(pixbuf, mask, 0, 0, 0, 0, width,
                                          height, 1);

        GdkColor fg = { 0, 0, 0, 0 }; // Black
        GdkColor bg = { 0, 0xFFFF, 0xFFFF, 0xFFFF }; // White

        cursor = gdk_cursor_new_from_pixmap(image, mask, &fg, &bg, aHotspotX,
                                            aHotspotY);
        g_object_unref(image);
        g_object_unref(mask);
    } else {
        // Now create the cursor
        cursor = _gdk_cursor_new_from_pixbuf(_gdk_display_get_default(),
                                             pixbuf,
                                             aHotspotX, aHotspotY);
    }
    gdk_pixbuf_unref(pixbuf);
    nsresult rv = NS_ERROR_OUT_OF_MEMORY;
    if (cursor) {
        if (mContainer) {
            gdk_window_set_cursor(GTK_WIDGET(mContainer)->window, cursor);
            rv = NS_OK;
        }
        gdk_cursor_unref(cursor);
    }

    return rv;
}


NS_IMETHODIMP
nsWindow::Validate()
{
    // Get the update for this window and, well, just drop it on the
    // floor.
    if (!mDrawingarea)
        return NS_OK;

    GdkRegion *region = gdk_window_get_update_area(mDrawingarea->inner_window);

    if (region)
        gdk_region_destroy(region);

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::Invalidate(PRBool aIsSynchronous)
{
    GdkRectangle rect;

    rect.x = mBounds.x;
    rect.y = mBounds.y;
    rect.width = mBounds.width;
    rect.height = mBounds.height;

    LOGDRAW(("Invalidate (all) [%p]: %d %d %d %d\n", (void *)this,
             rect.x, rect.y, rect.width, rect.height));

    if (!mDrawingarea)
        return NS_OK;

    gdk_window_invalidate_rect(mDrawingarea->inner_window,
                               &rect, FALSE);
    if (aIsSynchronous)
        gdk_window_process_updates(mDrawingarea->inner_window, FALSE);

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::Invalidate(const nsRect &aRect,
                     PRBool        aIsSynchronous)
{
    GdkRectangle rect;

    rect.x = aRect.x;
    rect.y = aRect.y;
    rect.width = aRect.width;
    rect.height = aRect.height;

    LOGDRAW(("Invalidate (rect) [%p]: %d %d %d %d (sync: %d)\n", (void *)this,
             rect.x, rect.y, rect.width, rect.height, aIsSynchronous));

    if (!mDrawingarea)
        return NS_OK;

    gdk_window_invalidate_rect(mDrawingarea->inner_window,
                               &rect, FALSE);
    if (aIsSynchronous)
        gdk_window_process_updates(mDrawingarea->inner_window, FALSE);

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::InvalidateRegion(const nsIRegion* aRegion,
                           PRBool           aIsSynchronous)
{
    GdkRegion *region = nsnull;
    aRegion->GetNativeRegion((void *&)region);

    if (region && mDrawingarea) {
        GdkRectangle rect;
        gdk_region_get_clipbox(region, &rect);

        LOGDRAW(("Invalidate (region) [%p]: %d %d %d %d (sync: %d)\n",
                 (void *)this,
                 rect.x, rect.y, rect.width, rect.height, aIsSynchronous));

        gdk_window_invalidate_region(mDrawingarea->inner_window,
                                     region, FALSE);
    }
    else {
        LOGDRAW(("Invalidate (region) [%p] with empty region\n",
                 (void *)this));
    }

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::Update()
{
    if (!mDrawingarea)
        return NS_OK;

    gdk_window_process_updates(mDrawingarea->inner_window, FALSE);
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::SetColorMap(nsColorMap *aColorMap)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::Scroll(PRInt32  aDx,
                 PRInt32  aDy,
                 nsRect  *aClipRect)
{
    if (!mDrawingarea)
        return NS_OK;

    moz_drawingarea_scroll(mDrawingarea, aDx, aDy);

    // Update bounds on our child windows
    for (nsIWidget* kid = mFirstChild; kid; kid = kid->GetNextSibling()) {
        nsRect bounds;
        kid->GetBounds(bounds);
        bounds.x += aDx;
        bounds.y += aDy;
        static_cast<nsBaseWidget*>(kid)->SetBounds(bounds);
    }

    // Process all updates so that everything is drawn.
    gdk_window_process_all_updates();
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::ScrollWidgets(PRInt32 aDx,
                        PRInt32 aDy)
{
    if (!mDrawingarea)
        return NS_OK;

    moz_drawingarea_scroll(mDrawingarea, aDx, aDy);
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::ScrollRect(nsRect  &aSrcRect,
                     PRInt32  aDx,
                     PRInt32  aDy)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

void*
nsWindow::GetNativeData(PRUint32 aDataType)
{
    switch (aDataType) {
    case NS_NATIVE_WINDOW:
    case NS_NATIVE_WIDGET: {
        if (!mDrawingarea)
            return nsnull;

        return mDrawingarea->inner_window;
        break;
    }

    case NS_NATIVE_PLUGIN_PORT:
        return SetupPluginPort();
        break;

    case NS_NATIVE_DISPLAY:
        return GDK_DISPLAY();
        break;

    case NS_NATIVE_GRAPHIC: {
        NS_ASSERTION(nsnull != mToolkit, "NULL toolkit, unable to get a GC");
        return (void *)static_cast<nsGTKToolkit *>(mToolkit)->GetSharedGC();
        break;
    }

    case NS_NATIVE_SHELLWIDGET:
        return (void *) mShell;

    default:
        NS_WARNING("nsWindow::GetNativeData called with bad value");
        return nsnull;
    }
}

NS_IMETHODIMP
nsWindow::SetBorderStyle(nsBorderStyle aBorderStyle)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::SetTitle(const nsAString& aTitle)
{
    if (!mShell)
        return NS_OK;

    // convert the string into utf8 and set the title.
#define UTF8_FOLLOWBYTE(ch) (((ch) & 0xC0) == 0x80)
    NS_ConvertUTF16toUTF8 titleUTF8(aTitle);
    if (titleUTF8.Length() > NS_WINDOW_TITLE_MAX_LENGTH) {
        // Truncate overlong titles (bug 167315). Make sure we chop after a
        // complete sequence by making sure the next char isn't a follow-byte.
        PRUint32 len = NS_WINDOW_TITLE_MAX_LENGTH;
        while(UTF8_FOLLOWBYTE(titleUTF8[len]))
            --len;
        titleUTF8.Truncate(len);
    }
    gtk_window_set_title(GTK_WINDOW(mShell), (const char *)titleUTF8.get());

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::SetIcon(const nsAString& aIconSpec)
{
    if (!mShell)
        return NS_OK;

    nsCOMPtr<nsILocalFile> iconFile;
    nsCAutoString path;
    nsCStringArray iconList;

    // Assume the given string is a local identifier for an icon file.

    ResolveIconName(aIconSpec, NS_LITERAL_STRING(".xpm"),
                    getter_AddRefs(iconFile));
    if (iconFile) {
        iconFile->GetNativePath(path);
        iconList.AppendCString(path);
    }

    // Get the 16px icon path as well
    ResolveIconName(aIconSpec, NS_LITERAL_STRING("16.xpm"),
                    getter_AddRefs(iconFile));
    if (iconFile) {
        iconFile->GetNativePath(path);
        iconList.AppendCString(path);
    }

    // leave the default icon intact if no matching icons were found
    if (iconList.Count() == 0)
        return NS_OK;

    return SetWindowIconList(iconList);
}

NS_IMETHODIMP
nsWindow::SetMenuBar(nsIMenuBar * aMenuBar)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::ShowMenuBar(PRBool aShow)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::WidgetToScreen(const nsRect& aOldRect, nsRect& aNewRect)
{
    gint x = 0, y = 0;

    if (mContainer) {
        gdk_window_get_root_origin(GTK_WIDGET(mContainer)->window,
                                   &x, &y);
        LOG(("WidgetToScreen (container) %d %d\n", x, y));
    }
    else if (mDrawingarea) {
        gdk_window_get_origin(mDrawingarea->inner_window, &x, &y);
        LOG(("WidgetToScreen (drawing) %d %d\n", x, y));
    }

    aNewRect.x = x + aOldRect.x;
    aNewRect.y = y + aOldRect.y;
    aNewRect.width = aOldRect.width;
    aNewRect.height = aOldRect.height;

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::ScreenToWidget(const nsRect& aOldRect, nsRect& aNewRect)
{
    gint x = 0, y = 0;

    if (mContainer) {
        gdk_window_get_root_origin(GTK_WIDGET(mContainer)->window,
                                   &x, &y);
    }
    else if (mDrawingarea) {
        gdk_window_get_origin(mDrawingarea->inner_window, &x, &y);
    }

    aNewRect.x = aOldRect.x - x;
    aNewRect.y = aOldRect.y - y;
    aNewRect.width = aOldRect.width;
    aNewRect.height = aOldRect.height;

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::BeginResizingChildren(void)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::EndResizingChildren(void)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::EnableDragDrop(PRBool aEnable)
{
    return NS_OK;
}

void
nsWindow::ConvertToDeviceCoordinates(nscoord &aX,
                                     nscoord &aY)
{
}

NS_IMETHODIMP
nsWindow::PreCreateWidget(nsWidgetInitData *aWidgetInitData)
{
    if (nsnull != aWidgetInitData) {
        mWindowType = aWidgetInitData->mWindowType;
        mBorderStyle = aWidgetInitData->mBorderStyle;
        return NS_OK;
    }
    return NS_ERROR_FAILURE;
}

NS_IMETHODIMP
nsWindow::CaptureMouse(PRBool aCapture)
{
    LOG(("CaptureMouse %p\n", (void *)this));

    if (!mDrawingarea)
        return NS_OK;

    GtkWidget *widget =
        get_gtk_widget_for_gdk_window(mDrawingarea->inner_window);

    if (aCapture) {
        gtk_grab_add(widget);
        GrabPointer();
    }
    else {
        ReleaseGrabs();
        gtk_grab_remove(widget);
    }

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::CaptureRollupEvents(nsIRollupListener *aListener,
                              PRBool             aDoCapture,
                              PRBool             aConsumeRollupEvent)
{
    if (!mDrawingarea)
        return NS_OK;

    GtkWidget *widget =
        get_gtk_widget_for_gdk_window(mDrawingarea->inner_window);

    LOG(("CaptureRollupEvents %p\n", (void *)this));

    if (aDoCapture) {
        gRollupListener = aListener;
        gRollupWindow = do_GetWeakReference(static_cast<nsIWidget*>
                                                       (this));
        // real grab is only done when there is no dragging
        if (!nsWindow::DragInProgress()) {
            gtk_grab_add(widget);
            GrabPointer();
            GrabKeyboard();
        }
    }
    else {
        if (!nsWindow::DragInProgress()) {
            ReleaseGrabs();
            gtk_grab_remove(widget);
        }
        gRollupListener = nsnull;
        gRollupWindow = nsnull;
    }

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::GetAttention(PRInt32 aCycleCount)
{
    LOG(("nsWindow::GetAttention [%p]\n", (void *)this));

    GtkWidget* top_window = nsnull;
    GtkWidget* top_focused_window = nsnull;
    GetToplevelWidget(&top_window);
    if (gFocusWindow)
        gFocusWindow->GetToplevelWidget(&top_focused_window);

    // Don't get attention if the window is focused anyway.
    if (top_window && (GTK_WIDGET_VISIBLE(top_window)) &&
        top_window != top_focused_window) {
        SetUrgencyHint(top_window, PR_TRUE);
    }

    return NS_OK;
}

void
nsWindow::LoseFocus(void)
{
    // make sure that we reset our key down counter so the next keypress
    // for this widget will get the down event
    memset(mKeyDownFlags, 0, sizeof(mKeyDownFlags));

    // Dispatch a lostfocus event
    DispatchLostFocusEvent();

    LOGFOCUS(("  widget lost focus [%p]\n", (void *)this));
}

#ifdef DEBUG
// Paint flashing code

#define CAPS_LOCK_IS_ON \
(gdk_keyboard_get_modifiers() & GDK_LOCK_MASK)

#define WANT_PAINT_FLASHING \
(debug_WantPaintFlashing() && CAPS_LOCK_IS_ON)

static void
gdk_window_flash(GdkWindow *    aGdkWindow,
                 unsigned int   aTimes,
                 unsigned int   aInterval,  // Milliseconds
                 GdkRegion *    aRegion)
{
  gint         x;
  gint         y;
  gint         width;
  gint         height;
  guint        i;
  GdkGC *      gc = 0;
  GdkColor     white;

  gdk_window_get_geometry(aGdkWindow,
                          NULL,
                          NULL,
                          &width,
                          &height,
                          NULL);

  gdk_window_get_origin (aGdkWindow,
                         &x,
                         &y);

  gc = gdk_gc_new(GDK_ROOT_PARENT());

  white.pixel = WhitePixel(gdk_display,DefaultScreen(gdk_display));

  gdk_gc_set_foreground(gc,&white);
  gdk_gc_set_function(gc,GDK_XOR);
  gdk_gc_set_subwindow(gc,GDK_INCLUDE_INFERIORS);
  
  gdk_region_offset(aRegion, x, y);
  gdk_gc_set_clip_region(gc, aRegion);

  /*
   * Need to do this twice so that the XOR effect can replace 
   * the original window contents.
   */
  for (i = 0; i < aTimes * 2; i++)
  {
    gdk_draw_rectangle(GDK_ROOT_PARENT(),
                       gc,
                       TRUE,
                       x,
                       y,
                       width,
                       height);

    gdk_flush();
    
    PR_Sleep(PR_MillisecondsToInterval(aInterval));
  }

  gdk_gc_destroy(gc);

  gdk_region_offset(aRegion, -x, -y);
}
#endif // DEBUG

gboolean
nsWindow::OnExposeEvent(GtkWidget *aWidget, GdkEventExpose *aEvent)
{
    if (mIsDestroyed) {
        LOG(("Expose event on destroyed window [%p] window %p\n",
             (void *)this, (void *)aEvent->window));
        return FALSE;
    }

    if (!mDrawingarea)
        return FALSE;

    // handle exposes for the inner window only
    if (aEvent->window != mDrawingarea->inner_window)
        return FALSE;

    static NS_DEFINE_CID(kRegionCID, NS_REGION_CID);

    nsCOMPtr<nsIRegion> updateRegion = do_CreateInstance(kRegionCID);
    if (!updateRegion)
        return FALSE;

    updateRegion->Init();

    GdkRectangle *rects;
    gint nrects;
    gdk_region_get_rectangles(aEvent->region, &rects, &nrects);
    if (NS_UNLIKELY(!rects)) // OOM
        return FALSE;

    LOGDRAW(("sending expose event [%p] %p 0x%lx (rects follow):\n",
             (void *)this, (void *)aEvent->window,
             GDK_WINDOW_XWINDOW(aEvent->window)));

    GdkRectangle *r;
    GdkRectangle *r_end = rects + nrects;
    for (r = rects; r < r_end; ++r) {
        updateRegion->Union(r->x, r->y, r->width, r->height);
        LOGDRAW(("\t%d %d %d %d\n", r->x, r->y, r->width, r->height));
    }

    nsCOMPtr<nsIRenderingContext> rc = getter_AddRefs(GetRenderingContext());
    if (NS_UNLIKELY(!rc)) {
        g_free(rects);
        return FALSE;
    }

    PRBool translucent;
    GetWindowTranslucency(translucent);
    nsIntRect boundsRect;
    GdkPixmap* bufferPixmap = nsnull;
    nsRefPtr<gfxXlibSurface> bufferPixmapSurface;

    updateRegion->GetBoundingBox(&boundsRect.x, &boundsRect.y,
                                 &boundsRect.width, &boundsRect.height);

    // do double-buffering and clipping here
    nsRefPtr<gfxContext> ctx
        = (gfxContext*)rc->GetNativeGraphicData(nsIRenderingContext::NATIVE_THEBES_CONTEXT);
    ctx->Save();
    ctx->NewPath();
    if (translucent) {
        // Collapse update area to the bounding box. This is so we only have to
        // call UpdateTranslucentWindowAlpha once. After we have dropped
        // support for non-Thebes graphics, UpdateTranslucentWindowAlpha will be
        // our private interface so we can rework things to avoid this.
        ctx->Rectangle(gfxRect(boundsRect.x, boundsRect.y,
                               boundsRect.width, boundsRect.height));
    } else {
        for (r = rects; r < r_end; ++r) {
            ctx->Rectangle(gfxRect(r->x, r->y, r->width, r->height));
        }
    }
    ctx->Clip();

    // double buffer
    if (translucent) {
        ctx->PushGroup(gfxASurface::CONTENT_COLOR_ALPHA);
    } else {
#ifdef MOZ_ENABLE_GLITZ
        ctx->PushGroup(gfxASurface::CONTENT_COLOR);
#else // MOZ_ENABLE_GLITZ
        // Instead of just doing PushGroup we're going to do a little dance
        // to ensure that GDK creates the pixmap, so it doesn't go all
        // XGetGeometry on us in gdk_pixmap_foreign_new_for_display when we
        // paint native themes
        GdkDrawable* d = GDK_DRAWABLE(mDrawingarea->inner_window);
        gint depth = gdk_drawable_get_depth(d);
        bufferPixmap = gdk_pixmap_new(d, boundsRect.width, boundsRect.height, depth);
        if (bufferPixmap) {
            GdkVisual* visual = gdk_drawable_get_visual(GDK_DRAWABLE(bufferPixmap));
            Visual* XVisual = gdk_x11_visual_get_xvisual(visual);
            Display* display = gdk_x11_drawable_get_xdisplay(GDK_DRAWABLE(bufferPixmap));
            Drawable drawable = gdk_x11_drawable_get_xid(GDK_DRAWABLE(bufferPixmap));
            bufferPixmapSurface =
                new gfxXlibSurface(display, drawable, XVisual,
                                   gfxIntSize(boundsRect.width, boundsRect.height));
            if (bufferPixmapSurface) {
                bufferPixmapSurface->SetDeviceOffset(gfxPoint(-boundsRect.x, -boundsRect.y));
                nsCOMPtr<nsIRenderingContext> newRC;
                nsresult rv = GetDeviceContext()->
                    CreateRenderingContextInstance(*getter_AddRefs(newRC));
                if (NS_FAILED(rv)) {
                    bufferPixmapSurface = nsnull;
                } else {
                    rv = newRC->Init(GetDeviceContext(), bufferPixmapSurface);
                    if (NS_FAILED(rv)) {
                        bufferPixmapSurface = nsnull;
                    } else {
                        rc = newRC;
                    }
                }
            }
        }
#endif // MOZ_ENABLE_GLITZ
    }

#if 0
    // NOTE: Paint flashing region would be wrong for cairo, since
    // cairo inflates the update region, etc.  So don't paint flash
    // for cairo.
#ifdef DEBUG
    if (WANT_PAINT_FLASHING && aEvent->window)
        gdk_window_flash(aEvent->window, 1, 100, aEvent->region);
#endif
#endif

    nsPaintEvent event(PR_TRUE, NS_PAINT, this);
    event.refPoint.x = aEvent->area.x;
    event.refPoint.y = aEvent->area.y;
    event.rect = nsnull;
    event.region = updateRegion;
    event.renderingContext = rc;

    nsEventStatus status;
    DispatchEvent(&event, status);

    // DispatchEvent can Destroy us (bug 378273), avoid doing any paint
    // operations below if that happened - it will lead to XError and exit().
    if (NS_LIKELY(!mIsDestroyed)) {
        if (status != nsEventStatus_eIgnore) {
            if (translucent) {
                nsRefPtr<gfxPattern> pattern = ctx->PopGroup();
                ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
                ctx->SetPattern(pattern);
                ctx->Paint();

                nsRefPtr<gfxImageSurface> img =
                    new gfxImageSurface(gfxIntSize(boundsRect.width, boundsRect.height),
                                        gfxImageSurface::ImageFormatA8);
                if (img && !img->CairoStatus()) {
                    img->SetDeviceOffset(gfxPoint(-boundsRect.x, -boundsRect.y));
            
                    nsRefPtr<gfxContext> imgCtx = new gfxContext(img);
                    if (imgCtx) {
                        imgCtx->SetPattern(pattern);
                        imgCtx->SetOperator(gfxContext::OPERATOR_SOURCE);
                        imgCtx->Paint();
                    }

                    UpdateTranslucentWindowAlphaInternal(nsRect(boundsRect.x, boundsRect.y,
                                                                boundsRect.width, boundsRect.height),
                                                         img->Data(), img->Stride());
                }
            } else {
#ifdef MOZ_ENABLE_GLITZ
                ctx->PopGroupToSource();
                ctx->Paint();
#else // MOZ_ENABLE_GLITZ
                if (bufferPixmapSurface) {
                    ctx->SetSource(bufferPixmapSurface);
                    ctx->Paint();
                }
#endif // MOZ_ENABLE_GLITZ
            }
        } else {
            // ignore
            if (translucent) {
                ctx->PopGroup();
            } else {
#ifdef MOZ_ENABLE_GLITZ
                ctx->PopGroup();
#endif // MOZ_ENABLE_GLITZ
            }
        }

        if (bufferPixmap) {
            g_object_unref(G_OBJECT(bufferPixmap));
        }

        ctx->Restore();
    }

    g_free(rects);

    // check the return value!
    return TRUE;
}

gboolean
nsWindow::OnConfigureEvent(GtkWidget *aWidget, GdkEventConfigure *aEvent)
{
    LOG(("configure event [%p] %d %d %d %d\n", (void *)this,
         aEvent->x, aEvent->y, aEvent->width, aEvent->height));

    // can we shortcut?
    if (mBounds.x == aEvent->x &&
        mBounds.y == aEvent->y)
        return FALSE;

    // Toplevel windows need to have their bounds set so that we can
    // keep track of our location.  It's not often that the x,y is set
    // by the layout engine.  Width and height are set elsewhere.
    if (mIsTopLevel) {
        mPlaced = PR_TRUE;
        // Need to translate this into the right coordinates
        nsRect oldrect, newrect;
        WidgetToScreen(oldrect, newrect);
        mBounds.x = newrect.x;
        mBounds.y = newrect.y;
    }

    nsGUIEvent event(PR_TRUE, NS_MOVE, this);

    event.refPoint.x = aEvent->x;
    event.refPoint.y = aEvent->y;

    // XXX mozilla will invalidate the entire window after this move
    // complete.  wtf?
    nsEventStatus status;
    DispatchEvent(&event, status);

    return FALSE;
}

void
nsWindow::OnSizeAllocate(GtkWidget *aWidget, GtkAllocation *aAllocation)
{
    LOG(("size_allocate [%p] %d %d %d %d\n",
         (void *)this, aAllocation->x, aAllocation->y,
         aAllocation->width, aAllocation->height));

    nsRect rect(aAllocation->x, aAllocation->y,
                aAllocation->width, aAllocation->height);

    ResizeTransparencyBitmap(rect.width, rect.height);

    mBounds.width = rect.width;
    mBounds.height = rect.height;

    if (!mDrawingarea)
        return;

    moz_drawingarea_resize (mDrawingarea, rect.width, rect.height);

    if (mTransparencyBitmap) {
      ApplyTransparencyBitmap();
    }

    nsEventStatus status;
    DispatchResizeEvent (rect, status);
}

void
nsWindow::OnDeleteEvent(GtkWidget *aWidget, GdkEventAny *aEvent)
{
    nsGUIEvent event(PR_TRUE, NS_XUL_CLOSE, this);

    event.refPoint.x = 0;
    event.refPoint.y = 0;

    nsEventStatus status;
    DispatchEvent(&event, status);
}

void
nsWindow::OnEnterNotifyEvent(GtkWidget *aWidget, GdkEventCrossing *aEvent)
{
    // XXXldb Is this the right test for embedding cases?
    if (aEvent->subwindow != NULL)
        return;

    nsMouseEvent event(PR_TRUE, NS_MOUSE_ENTER, this, nsMouseEvent::eReal);

    event.refPoint.x = nscoord(aEvent->x);
    event.refPoint.y = nscoord(aEvent->y);

    event.time = aEvent->time;

    LOG(("OnEnterNotify: %p\n", (void *)this));

    nsEventStatus status;
    DispatchEvent(&event, status);
}

void
nsWindow::OnLeaveNotifyEvent(GtkWidget *aWidget, GdkEventCrossing *aEvent)
{
    // XXXldb Is this the right test for embedding cases?
    if (aEvent->subwindow != NULL)
        return;

    nsMouseEvent event(PR_TRUE, NS_MOUSE_EXIT, this, nsMouseEvent::eReal);

    event.refPoint.x = nscoord(aEvent->x);
    event.refPoint.y = nscoord(aEvent->y);

    event.time = aEvent->time;

    LOG(("OnLeaveNotify: %p\n", (void *)this));

    nsEventStatus status;
    DispatchEvent(&event, status);
}

void
nsWindow::OnMotionNotifyEvent(GtkWidget *aWidget, GdkEventMotion *aEvent)
{
    // when we receive this, it must be that the gtk dragging is over,
    // it is dropped either in or out of mozilla, clear the flag
    sIsDraggingOutOf = PR_FALSE;

    // see if we can compress this event
    // XXXldb Why skip every other motion event when we have multiple,
    // but not more than that?
    XEvent xevent;
    PRPackedBool synthEvent = PR_FALSE;
    while (XCheckWindowEvent(GDK_WINDOW_XDISPLAY(aEvent->window),
                             GDK_WINDOW_XWINDOW(aEvent->window),
                             ButtonMotionMask, &xevent)) {
        synthEvent = PR_TRUE;
    }

    // if plugins still keeps the focus, get it back
    if (gPluginFocusWindow && gPluginFocusWindow != this) {
        nsRefPtr<nsWindow> kungFuDeathGrip = gPluginFocusWindow;
        gPluginFocusWindow->LoseNonXEmbedPluginFocus();
    }

    nsMouseEvent event(PR_TRUE, NS_MOUSE_MOVE, this, nsMouseEvent::eReal);

    if (synthEvent) {
        event.refPoint.x = nscoord(xevent.xmotion.x);
        event.refPoint.y = nscoord(xevent.xmotion.y);

        event.isShift   = (xevent.xmotion.state & GDK_SHIFT_MASK)
            ? PR_TRUE : PR_FALSE;
        event.isControl = (xevent.xmotion.state & GDK_CONTROL_MASK)
            ? PR_TRUE : PR_FALSE;
        event.isAlt     = (xevent.xmotion.state & GDK_MOD1_MASK)
            ? PR_TRUE : PR_FALSE;

        event.time = xevent.xmotion.time;
    }
    else {
        event.refPoint.x = nscoord(aEvent->x);
        event.refPoint.y = nscoord(aEvent->y);

        event.isShift   = (aEvent->state & GDK_SHIFT_MASK)
            ? PR_TRUE : PR_FALSE;
        event.isControl = (aEvent->state & GDK_CONTROL_MASK)
            ? PR_TRUE : PR_FALSE;
        event.isAlt     = (aEvent->state & GDK_MOD1_MASK)
            ? PR_TRUE : PR_FALSE;

        event.time = aEvent->time;
    }

    nsEventStatus status;
    DispatchEvent(&event, status);
}

void
nsWindow::OnButtonPressEvent(GtkWidget *aWidget, GdkEventButton *aEvent)
{
    nsEventStatus status;

    // If you double click in GDK, it will actually generate a single
    // click event before sending the double click event, and this is
    // different than the DOM spec.  GDK puts this in the queue
    // programatically, so it's safe to assume that if there's a
    // double click in the queue, it was generated so we can just drop
    // this click.
    GdkEvent *peekedEvent = gdk_event_peek();
    if (peekedEvent) {
        GdkEventType type = peekedEvent->any.type;
        gdk_event_free(peekedEvent);
        if (type == GDK_2BUTTON_PRESS || type == GDK_3BUTTON_PRESS)
            return;
    }

    // Always save the time of this event
    mLastButtonPressTime = aEvent->time;
    mLastButtonReleaseTime = 0;

    // check to see if we should rollup
    nsWindow *containerWindow;
    GetContainerWindow(&containerWindow);

    if (!gFocusWindow) {
        containerWindow->mActivatePending = PR_FALSE;
        DispatchActivateEvent();
    }
    if (check_for_rollup(aEvent->window, aEvent->x_root, aEvent->y_root,
                         PR_FALSE))
        return;

    PRUint16 domButton;
    switch (aEvent->button) {
    case 1:
        domButton = nsMouseEvent::eLeftButton;
        break;
    case 2:
        domButton = nsMouseEvent::eMiddleButton;
        break;
    case 3:
        domButton = nsMouseEvent::eRightButton;
        break;
    default:
        return;
    }

    nsMouseEvent event(PR_TRUE, NS_MOUSE_BUTTON_DOWN, this, nsMouseEvent::eReal);
    event.button = domButton;
    InitButtonEvent(event, aEvent);

    DispatchEvent(&event, status);

    // right menu click on linux should also pop up a context menu
    if (domButton == nsMouseEvent::eRightButton &&
        NS_LIKELY(!mIsDestroyed)) {
        nsMouseEvent contextMenuEvent(PR_TRUE, NS_CONTEXTMENU, this,
                                      nsMouseEvent::eReal);
        InitButtonEvent(contextMenuEvent, aEvent);
        DispatchEvent(&contextMenuEvent, status);
    }
}

void
nsWindow::OnButtonReleaseEvent(GtkWidget *aWidget, GdkEventButton *aEvent)
{
    PRUint16 domButton;
    mLastButtonReleaseTime = aEvent->time;

    switch (aEvent->button) {
    case 1:
        domButton = nsMouseEvent::eLeftButton;
        break;
    case 2:
        domButton = nsMouseEvent::eMiddleButton;
        break;
    case 3:
        domButton = nsMouseEvent::eRightButton;
        break;
    default:
        return;
    }

    nsMouseEvent event(PR_TRUE, NS_MOUSE_BUTTON_UP, this, nsMouseEvent::eReal);
    event.button = domButton;
    InitButtonEvent(event, aEvent);

    nsEventStatus status;
    DispatchEvent(&event, status);
}

void
nsWindow::OnContainerFocusInEvent(GtkWidget *aWidget, GdkEventFocus *aEvent)
{
    LOGFOCUS(("OnContainerFocusInEvent [%p]\n", (void *)this));
    // Return if someone has blocked events for this widget.  This will
    // happen if someone has called gtk_widget_grab_focus() from
    // nsWindow::SetFocus() and will prevent recursion.
    if (mContainerBlockFocus) {
        LOGFOCUS(("Container focus is blocked [%p]\n", (void *)this));
        return;
    }

    if (mIsTopLevel)
        mActivatePending = PR_TRUE;

    // Unset the urgency hint, if possible
    GtkWidget* top_window = nsnull;
    GetToplevelWidget(&top_window);
    if (top_window && (GTK_WIDGET_VISIBLE(top_window)))
        SetUrgencyHint(top_window, PR_FALSE);

    // dispatch a got focus event
    DispatchGotFocusEvent();

    // send the activate event if it wasn't already sent via any
    // SetFocus() calls that were the result of the GOTFOCUS event
    // above.
    if (mActivatePending) {
        mActivatePending = PR_FALSE;
        DispatchActivateEvent();
    }

    LOGFOCUS(("Events sent from focus in event [%p]\n", (void *)this));
}

void
nsWindow::OnContainerFocusOutEvent(GtkWidget *aWidget, GdkEventFocus *aEvent)
{
    LOGFOCUS(("OnContainerFocusOutEvent [%p]\n", (void *)this));

    // plugin lose focus
    if (gPluginFocusWindow) {
        nsRefPtr<nsWindow> kungFuDeathGrip = gPluginFocusWindow;
        gPluginFocusWindow->LoseNonXEmbedPluginFocus();
    }

    // Figure out if the focus widget is the child of this window.  If
    // it is, send a focus out and deactivate event for it.
    if (!gFocusWindow)
        return;

    GdkWindow *tmpWindow;
    tmpWindow = (GdkWindow *)gFocusWindow->GetNativeData(NS_NATIVE_WINDOW);
    nsWindow *tmpnsWindow = get_window_for_gdk_window(tmpWindow);

    while (tmpWindow && tmpnsWindow) {
        // found it!
        if (tmpnsWindow == this)
            goto foundit;

        tmpWindow = gdk_window_get_parent(tmpWindow);
        if (!tmpWindow)
            break;

        tmpnsWindow = get_owning_window_for_gdk_window(tmpWindow);
    }

    LOGFOCUS(("The focus widget was not a child of this window [%p]\n",
              (void *)this));

    return;

 foundit:

    nsRefPtr<nsWindow> kungFuDeathGrip = gFocusWindow;
#ifdef USE_XIM
    gFocusWindow->IMELoseFocus();
#endif

    gFocusWindow->LoseFocus();

    // We only dispatch a deactivate event if we are a toplevel
    // window, otherwise the embedding code takes care of it.
    if (mIsTopLevel && NS_LIKELY(!gFocusWindow->mIsDestroyed))
        gFocusWindow->DispatchDeactivateEvent();

    gFocusWindow = nsnull;

    mActivatePending = PR_FALSE;

    LOGFOCUS(("Done with container focus out [%p]\n", (void *)this));
}

gboolean
nsWindow::OnKeyPressEvent(GtkWidget *aWidget, GdkEventKey *aEvent)
{
    LOGFOCUS(("OnKeyPressEvent [%p]\n", (void *)this));

#ifdef USE_XIM
    // if we are in the middle of composing text, XIM gets to see it
    // before mozilla does.
   LOGIM(("key press [%p]: composing %d val %d\n",
           (void *)this, IMEComposingWindow() != nsnull, aEvent->keyval));
   if (IMEFilterEvent(aEvent))
       return TRUE;
   LOGIM(("sending as regular key press event\n"));
#endif

    nsEventStatus status;

    // work around for annoying things.
    if (aEvent->keyval == GDK_Tab && aEvent->state & GDK_CONTROL_MASK &&
        aEvent->state & GDK_MOD1_MASK) {
        return TRUE;
    }

    nsCOMPtr<nsIWidget> kungFuDeathGrip = this;

    // If the key down flag isn't set then set it so we don't send
    // another key down event on the next key press -- DOM events are
    // key down, key press and key up.  X only has key press and key
    // release.  gtk2 already filters the extra key release events for
    // us.

    PRBool isKeyDownCancelled = PR_FALSE;
    
    PRUint32 domVirtualKeyCode = GdkKeyCodeToDOMKeyCode(aEvent->keyval);

    if (!IsKeyDown(domVirtualKeyCode)) {
        SetKeyDownFlag(domVirtualKeyCode);

        // send the key down event
        nsKeyEvent downEvent(PR_TRUE, NS_KEY_DOWN, this);
        InitKeyEvent(downEvent, aEvent);
        DispatchEvent(&downEvent, status);
        if (NS_UNLIKELY(mIsDestroyed))
            return PR_TRUE;
        isKeyDownCancelled = (status == nsEventStatus_eConsumeNoDefault);
    }

    // Don't pass modifiers as NS_KEY_PRESS events.
    // TODO: Instead of selectively excluding some keys from NS_KEY_PRESS events,
    //       we should instead selectively include (as per MSDN spec; no official
    //       spec covers KeyPress events).
    if (aEvent->keyval == GDK_Shift_L
        || aEvent->keyval == GDK_Shift_R
        || aEvent->keyval == GDK_Control_L
        || aEvent->keyval == GDK_Control_R
        || aEvent->keyval == GDK_Alt_L
        || aEvent->keyval == GDK_Alt_R
        || aEvent->keyval == GDK_Meta_L
        || aEvent->keyval == GDK_Meta_R) {
        return TRUE;
    }
    nsKeyEvent event(PR_TRUE, NS_KEY_PRESS, this);
    InitKeyEvent(event, aEvent);
    if (isKeyDownCancelled) {
      // If prevent default set for onkeydown, do the same for onkeypress
      event.flags |= NS_EVENT_FLAG_NO_DEFAULT;
    }
    event.charCode = nsConvertCharCodeToUnicode(aEvent);
    if (event.charCode) {
        event.keyCode = 0;
        // if the control, meta, or alt key is down, then we should leave
        // the isShift flag alone (probably not a printable character)
        // if none of the other modifier keys are pressed then we need to
        // clear isShift so the character can be inserted in the editor

        if (event.isControl || event.isAlt || event.isMeta) {
           // make Ctrl+uppercase functional as same as Ctrl+lowercase
           // when Ctrl+uppercase(eg.Ctrl+C) is pressed,convert the charCode
           // from uppercase to lowercase(eg.Ctrl+c),so do Alt and Meta Key
           // It is hack code for bug 61355, there is same code snip for
           // Windows platform in widget/src/windows/nsWindow.cpp: See bug 16486
           // Note: if Shift is pressed at the same time, do not to_lower()
           // Because Ctrl+Shift has different function with Ctrl
           if (!event.isShift &&
               event.charCode >= GDK_A &&
               event.charCode <= GDK_Z)
            event.charCode = gdk_keyval_to_lower(event.charCode);

           // 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 (!event.isControl && event.isShift &&
               (event.charCode < GDK_0 || event.charCode > GDK_9)) {
               GdkKeymapKey k = { aEvent->hardware_keycode, aEvent->group, 0 };
               guint savedKeyval = aEvent->keyval;
               aEvent->keyval = gdk_keymap_lookup_key(gdk_keymap_get_default(), &k);
               PRUint32 unshiftedCharCode = nsConvertCharCodeToUnicode(aEvent);
               if (unshiftedCharCode)
                   event.charCode = unshiftedCharCode;
               else
                   aEvent->keyval = savedKeyval;
           }
        }
    }

    // before we dispatch a key, check if it's the context menu key.
    // If so, send a context menu key event instead.
    if (is_context_menu_key(event)) {
        nsMouseEvent contextMenuEvent(PR_TRUE, 0, nsnull, nsMouseEvent::eReal);
        key_event_to_context_menu_event(&event, &contextMenuEvent);
        DispatchEvent(&contextMenuEvent, status);
    }
    else {
        // send the key press event
        DispatchEvent(&event, status);
    }

    // If the event was consumed, return.
    LOGIM(("status %d\n", status));
    if (status == nsEventStatus_eConsumeNoDefault) {
        LOGIM(("key press consumed\n"));
        return TRUE;
    }

    return FALSE;
}

gboolean
nsWindow::OnKeyReleaseEvent(GtkWidget *aWidget, GdkEventKey *aEvent)
{
    LOGFOCUS(("OnKeyReleaseEvent [%p]\n", (void *)this));

#ifdef USE_XIM
    if (IMEFilterEvent(aEvent))
        return TRUE;
#endif

    // send the key event as a key up event
    nsKeyEvent event(PR_TRUE, NS_KEY_UP, this);
    InitKeyEvent(event, aEvent);

    // unset the key down flag
    ClearKeyDownFlag(event.keyCode);

    nsEventStatus status;
    DispatchEvent(&event, status);

    // If the event was consumed, return.
    if (status == nsEventStatus_eConsumeNoDefault) {
        LOGIM(("key release consumed\n"));
        return TRUE;
    }

    return FALSE;
}

void
nsWindow::OnScrollEvent(GtkWidget *aWidget, GdkEventScroll *aEvent)
{
    nsMouseScrollEvent event(PR_TRUE, NS_MOUSE_SCROLL, this);
    InitMouseScrollEvent(event, aEvent);

    // check to see if we should rollup
    if (check_for_rollup(aEvent->window, aEvent->x_root, aEvent->y_root,
                         PR_TRUE)) {
        return;
    }

    nsEventStatus status;
    DispatchEvent(&event, status);
}

void
nsWindow::OnVisibilityNotifyEvent(GtkWidget *aWidget,
                                  GdkEventVisibility *aEvent)
{
    switch (aEvent->state) {
    case GDK_VISIBILITY_UNOBSCURED:
    case GDK_VISIBILITY_PARTIAL:
        mIsVisible = PR_TRUE;
        // if we have to retry the grab, retry it.
        EnsureGrabs();
        break;
    default: // includes GDK_VISIBILITY_FULLY_OBSCURED
        mIsVisible = PR_FALSE;
        break;
    }
}

void
nsWindow::OnWindowStateEvent(GtkWidget *aWidget, GdkEventWindowState *aEvent)
{
    LOG(("nsWindow::OnWindowStateEvent [%p] changed %d new_window_state %d\n",
         (void *)this, aEvent->changed_mask, aEvent->new_window_state));

    nsSizeModeEvent event(PR_TRUE, NS_SIZEMODE, this);

    // We don't care about anything but changes in the maximized/icon
    // states
    if (aEvent->changed_mask &
        (GDK_WINDOW_STATE_ICONIFIED|GDK_WINDOW_STATE_MAXIMIZED) == 0) {
        return;
    }

    if (aEvent->new_window_state & GDK_WINDOW_STATE_ICONIFIED) {
        LOG(("\tIconified\n"));
        event.mSizeMode = nsSizeMode_Minimized;
        mSizeState = nsSizeMode_Minimized;
    }
    else if (aEvent->new_window_state & GDK_WINDOW_STATE_MAXIMIZED) {
        LOG(("\tMaximized\n"));
        event.mSizeMode = nsSizeMode_Maximized;
        mSizeState = nsSizeMode_Maximized;
    }
    else {
        LOG(("\tNormal\n"));
        event.mSizeMode = nsSizeMode_Normal;
        mSizeState = nsSizeMode_Normal;
    }

    nsEventStatus status;
    DispatchEvent(&event, status);
}

void
nsWindow::ThemeChanged()
{
    nsGUIEvent event(PR_TRUE, NS_THEMECHANGED, this);
    nsEventStatus status = nsEventStatus_eIgnore;
    DispatchEvent(&event, status);

    if (!mDrawingarea || NS_UNLIKELY(mIsDestroyed))
        return;

    // Dispatch NS_THEMECHANGED to all child windows
    GList *children =
        gdk_window_peek_children(mDrawingarea->inner_window);
    while (children) {
        GdkWindow *gdkWin = GDK_WINDOW(children->data);

        nsWindow *win = (nsWindow*) g_object_get_data(G_OBJECT(gdkWin),
                                                      "nsWindow");

        if (win && win != this) { // guard against infinite recursion
            nsRefPtr<nsWindow> kungFuDeathGrip = win;
            win->ThemeChanged();
        }

        children = children->next;
    }
}

gboolean
nsWindow::OnDragMotionEvent(GtkWidget *aWidget,
                            GdkDragContext *aDragContext,
                            gint aX,
                            gint aY,
                            guint aTime,
                            gpointer aData)
{
    LOG(("nsWindow::OnDragMotionSignal\n"));

    if (mLastButtonReleaseTime) {
      // The drag ended before it was even setup to handle the end of the drag
      // So, we fake the button getting released again to release the drag
      GtkWidget *widget = gtk_grab_get_current();
      GdkEvent event;
      gboolean retval;
      memset(&event, 0, sizeof(event));
      event.type = GDK_BUTTON_RELEASE;
      event.button.time = mLastButtonReleaseTime;
      event.button.button = 1;
      mLastButtonReleaseTime = 0;
      if (widget) {
        g_signal_emit_by_name(widget, "button_release_event", &event, &retval);
        return TRUE;
      }
    }

    sIsDraggingOutOf = PR_FALSE;

    // Reset out drag motion timer
    ResetDragMotionTimer(aWidget, aDragContext, aX, aY, aTime);

    // get our drag context
    nsCOMPtr<nsIDragService> dragService = do_GetService(kCDragServiceCID);
    nsCOMPtr<nsIDragSessionGTK> dragSessionGTK = do_QueryInterface(dragService);

    // first, figure out which internal widget this drag motion actually
    // happened on
    nscoord retx = 0;
    nscoord rety = 0;

    GdkWindow *innerWindow = get_inner_gdk_window(aWidget->window, aX, aY,
                                                  &retx, &rety);
    nsRefPtr<nsWindow> innerMostWidget = get_window_for_gdk_window(innerWindow);

    if (!innerMostWidget)
        innerMostWidget = this;

    // check to see if there was a drag motion window already in place
    if (mLastDragMotionWindow) {
        // if it wasn't this
        if (mLastDragMotionWindow != innerMostWidget) {
            // send a drag event to the last window that got a motion event
            nsRefPtr<nsWindow> kungFuDeathGrip = mLastDragMotionWindow;
            mLastDragMotionWindow->OnDragLeave();
            // and enter on the new one
            innerMostWidget->OnDragEnter(retx, rety);
        }
    }
    else {
        // if there was no other motion window, then we're starting a
        // drag. Send an enter event to initiate the drag.

        innerMostWidget->OnDragEnter(retx, rety);
    }

    // set the last window to the innerMostWidget
    mLastDragMotionWindow = innerMostWidget;

    // update the drag context
    dragSessionGTK->TargetSetLastContext(aWidget, aDragContext, aTime);

    // notify the drag service that we are starting a drag motion.
    dragSessionGTK->TargetStartDragMotion();

    dragService->FireDragEventAtSource(NS_DRAGDROP_DRAG);

    nsMouseEvent event(PR_TRUE, NS_DRAGDROP_OVER, innerMostWidget,
                       nsMouseEvent::eReal);

    InitDragEvent(event);

    // now that we have initialized the event update our drag status
    UpdateDragStatus(event, aDragContext, dragService);

    event.refPoint.x = retx;
    event.refPoint.y = rety;
    event.time = aTime;

    nsEventStatus status;
    innerMostWidget->DispatchEvent(&event, status);

    // we're done with the drag motion event.  notify the drag service.
    dragSessionGTK->TargetEndDragMotion(aWidget, aDragContext, aTime);

    // and unset our context
    dragSessionGTK->TargetSetLastContext(0, 0, 0);

    return TRUE;
}

void
nsWindow::OnDragLeaveEvent(GtkWidget *aWidget,
                           GdkDragContext *aDragContext,
                           guint aTime,
                           gpointer aData)
{
    // XXX Do we want to pass this on only if the event's subwindow is null?

    LOG(("nsWindow::OnDragLeaveSignal(%p)\n", this));

    sIsDraggingOutOf = PR_TRUE;

    // make sure to unset any drag motion timers here.
    ResetDragMotionTimer(0, 0, 0, 0, 0);

    // create a fast timer - we're delaying the drag leave until the
    // next mainloop in hopes that we might be able to get a drag drop
    // signal
    mDragLeaveTimer = do_CreateInstance("@mozilla.org/timer;1");
    NS_ASSERTION(mDragLeaveTimer, "Failed to create drag leave timer!");
    // fire this baby asafp, but not too quickly... see bug 216800 ;-)
    mDragLeaveTimer->InitWithFuncCallback(DragLeaveTimerCallback,
                                          (void *)this,
                                          20, nsITimer::TYPE_ONE_SHOT);
}

gboolean
nsWindow::OnDragDropEvent(GtkWidget *aWidget,
                          GdkDragContext *aDragContext,
                          gint aX,
                          gint aY,
                          guint aTime,
                          gpointer *aData)

{
    LOG(("nsWindow::OnDragDropSignal\n"));

    // get our drag context
    nsCOMPtr<nsIDragService> dragService = do_GetService(kCDragServiceCID);
    nsCOMPtr<nsIDragSessionGTK> dragSessionGTK = do_QueryInterface(dragService);

    nscoord retx = 0;
    nscoord rety = 0;

    GdkWindow *innerWindow = get_inner_gdk_window(aWidget->window, aX, aY,
                                                  &retx, &rety);
    nsRefPtr<nsWindow> innerMostWidget = get_window_for_gdk_window(innerWindow);

    // set this now before any of the drag enter or leave events happen
    dragSessionGTK->TargetSetLastContext(aWidget, aDragContext, aTime);

    if (!innerMostWidget)
        innerMostWidget = this;

    // check to see if there was a drag motion window already in place
    if (mLastDragMotionWindow) {
        // if it wasn't this
        if (mLastDragMotionWindow != innerMostWidget) {
            // send a drag event to the last window that got a motion event
            nsRefPtr<nsWindow> kungFuDeathGrip = mLastDragMotionWindow;
            mLastDragMotionWindow->OnDragLeave();
            // and enter on the new one
            innerMostWidget->OnDragEnter(retx, rety);
        }
    }
    else {
        // if there was no other motion window, send an enter event to
        // initiate the drag session.
        innerMostWidget->OnDragEnter(retx, rety);
    }

    // clear any drag leave timer that might be pending so that it
    // doesn't get processed when we actually go out to get data.
    if (mDragLeaveTimer) {
        mDragLeaveTimer->Cancel();
        mDragLeaveTimer = 0;
    }

    // set the last window to this
    mLastDragMotionWindow = innerMostWidget;

    // What we do here is dispatch a new drag motion event to
    // re-validate the drag target and then we do the drop.  The events
    // look the same except for the type.

    nsMouseEvent event(PR_TRUE, NS_DRAGDROP_OVER, innerMostWidget,
                       nsMouseEvent::eReal);

    InitDragEvent(event);

    // now that we have initialized the event update our drag status
    UpdateDragStatus(event, aDragContext, dragService);

    event.refPoint.x = retx;
    event.refPoint.y = rety;
    event.time = aTime;

    nsEventStatus status;
    innerMostWidget->DispatchEvent(&event, status);

    // We need to check innerMostWidget->mIsDestroyed here because the nsRefPtr
    // only protects innerMostWidget from being deleted, it does NOT protect
    // against nsView::~nsView() calling Destroy() on it, bug 378670.
    if (!innerMostWidget->mIsDestroyed) {
        event.message = NS_DRAGDROP_DROP;
        event.widget = innerMostWidget;
        event.refPoint.x = retx;
        event.refPoint.y = rety;

        innerMostWidget->DispatchEvent(&event, status);
    }

    // before we unset the context we need to do a drop_finish

    gdk_drop_finish(aDragContext, TRUE, aTime);

    // after a drop takes place we need to make sure that the drag
    // service doesn't think that it still has a context.  if the other
    // way ( besides the drop ) to end a drag event is during the leave
    // event and and that case is handled in that handler.
    dragSessionGTK->TargetSetLastContext(0, 0, 0);

    // send our drag exit event
    innerMostWidget->OnDragLeave();
    // and clear the mLastDragMotion window
    mLastDragMotionWindow = 0;

    // Make sure to end the drag session. If this drag started in a
    // different app, we won't get a drag_end signal to end it from.
    dragService->EndDragSession(PR_TRUE);

    return TRUE;
}

void
nsWindow::OnDragDataReceivedEvent(GtkWidget *aWidget,
                                  GdkDragContext *aDragContext,
                                  gint aX,
                                  gint aY,
                                  GtkSelectionData  *aSelectionData,
                                  guint aInfo,
                                  guint aTime,
                                  gpointer aData)
{
    LOG(("nsWindow::OnDragDataReceived(%p)\n", this));

    // get our drag context
    nsCOMPtr<nsIDragService> dragService = do_GetService(kCDragServiceCID);
    nsCOMPtr<nsIDragSessionGTK> dragSessionGTK = do_QueryInterface(dragService);

    dragSessionGTK->TargetDataReceived(aWidget, aDragContext, aX, aY,
                                       aSelectionData, aInfo, aTime);
}

void
nsWindow::OnDragLeave(void)
{
    LOG(("nsWindow::OnDragLeave(%p)\n", this));

    nsMouseEvent event(PR_TRUE, NS_DRAGDROP_EXIT, this, nsMouseEvent::eReal);

    nsEventStatus status;
    DispatchEvent(&event, status);

    nsCOMPtr<nsIDragService> dragService = do_GetService(kCDragServiceCID);

    if (dragService) {
        nsCOMPtr<nsIDragSession> currentDragSession;
        dragService->GetCurrentSession(getter_AddRefs(currentDragSession));

        if (currentDragSession) {
            nsCOMPtr<nsIDOMNode> sourceNode;
            currentDragSession->GetSourceNode(getter_AddRefs(sourceNode));

            if (!sourceNode) {
                // We're leaving a window while doing a drag that was
                // initiated in a different app. End the drag session,
                // since we're done with it for now (until the user
                // drags back into mozilla).
                dragService->EndDragSession(PR_FALSE);
            }
        }
    }
}

void
nsWindow::OnDragEnter(nscoord aX, nscoord aY)
{
    // XXX Do we want to pass this on only if the event's subwindow is null?

    LOG(("nsWindow::OnDragEnter(%p)\n", this));

    nsCOMPtr<nsIDragService> dragService = do_GetService(kCDragServiceCID);

    if (dragService) {
        // Make sure that the drag service knows we're now dragging.
        dragService->StartDragSession();
    }

    nsMouseEvent event(PR_TRUE, NS_DRAGDROP_ENTER, this, nsMouseEvent::eReal);

    event.refPoint.x = aX;
    event.refPoint.y = aY;

    nsEventStatus status;
    DispatchEvent(&event, status);
}

static void
GetBrandName(nsXPIDLString& brandName)
{
    nsCOMPtr<nsIStringBundleService> bundleService = 
        do_GetService(NS_STRINGBUNDLE_CONTRACTID);

    nsCOMPtr<nsIStringBundle> bundle;
    if (bundleService)
        bundleService->CreateBundle(
            "chrome://branding/locale/brand.properties",
            getter_AddRefs(bundle));

    if (bundle)
        bundle->GetStringFromName(
            NS_LITERAL_STRING("brandShortName").get(),
            getter_Copies(brandName));

    if (brandName.IsEmpty())
        brandName.Assign(NS_LITERAL_STRING("Mozilla"));
}

nsresult
nsWindow::NativeCreate(nsIWidget        *aParent,
                       nsNativeWidget    aNativeParent,
                       const nsRect     &aRect,
                       EVENT_CALLBACK    aHandleEventFunction,
                       nsIDeviceContext *aContext,
                       nsIAppShell      *aAppShell,
                       nsIToolkit       *aToolkit,
                       nsWidgetInitData *aInitData)
{
    // only set the base parent if we're going to be a dialog or a
    // toplevel
    nsIWidget *baseParent = aInitData &&
        (aInitData->mWindowType == eWindowType_dialog ||
         aInitData->mWindowType == eWindowType_toplevel ||
         aInitData->mWindowType == eWindowType_invisible) ?
        nsnull : aParent;

    NS_ASSERTION(aInitData->mWindowType != eWindowType_popup ||
                 !aParent, "Popups should not be hooked into nsIWidget hierarchy");
    NS_ASSERTION(!mWindowGroup, "already have window group (leaking it)");

    // initialize all the common bits of this class
    BaseCreate(baseParent, aRect, aHandleEventFunction, aContext,
               aAppShell, aToolkit, aInitData);

    // Do we need to listen for resizes?
    PRBool listenForResizes = PR_FALSE;;
    if (aNativeParent || (aInitData && aInitData->mListenForResizes))
        listenForResizes = PR_TRUE;

    // and do our common creation
    CommonCreate(aParent, listenForResizes);

    // save our bounds
    mBounds = aRect;
    if (mWindowType != eWindowType_child) {
        // The window manager might place us. Indicate that if we're
        // shown, we want to go through
        // nsWindow::NativeResize(x,y,w,h) to maybe set our own
        // position.
        mNeedsMove = PR_TRUE;
    }

    // figure out our parent window
    MozDrawingarea *parentArea = nsnull;
    MozContainer   *parentMozContainer = nsnull;
    GtkContainer   *parentGtkContainer = nsnull;
    GdkWindow      *parentGdkWindow = nsnull;
    GtkWindow      *topLevelParent = nsnull;

    if (aParent)
        parentGdkWindow = GDK_WINDOW(aParent->GetNativeData(NS_NATIVE_WINDOW));
    else if (aNativeParent && GDK_IS_WINDOW(aNativeParent))
        parentGdkWindow = GDK_WINDOW(aNativeParent);
    else if (aNativeParent && GTK_IS_CONTAINER(aNativeParent))
        parentGtkContainer = GTK_CONTAINER(aNativeParent);

    if (parentGdkWindow) {
        // find the mozarea on that window
        gpointer user_data = nsnull;
        user_data = g_object_get_data(G_OBJECT(parentGdkWindow),
                                      "mozdrawingarea");
        parentArea = MOZ_DRAWINGAREA(user_data);

        NS_ASSERTION(parentArea, "no drawingarea for parent widget!\n");
        if (!parentArea)
            return NS_ERROR_FAILURE;

        // get the user data for the widget - it should be a container
        user_data = nsnull;
        gdk_window_get_user_data(parentArea->inner_window, &user_data);
        NS_ASSERTION(user_data, "no user data for parentArea\n");
        if (!user_data)
            return NS_ERROR_FAILURE;

        // Get the parent moz container
        parentMozContainer = MOZ_CONTAINER(user_data);
        NS_ASSERTION(parentMozContainer,
                     "owning widget is not a mozcontainer!\n");
        if (!parentMozContainer)
            return NS_ERROR_FAILURE;

        // get the toplevel window just in case someone needs to use it
        // for setting transients or whatever.
        topLevelParent =
            GTK_WINDOW(gtk_widget_get_toplevel(GTK_WIDGET(parentMozContainer)));
    }

    GdkVisual* visual = nsnull;
#ifdef MOZ_ENABLE_GLITZ
    if (gfxPlatform::UseGlitz()) {
        nsCOMPtr<nsIDeviceContext> dc = aContext;
        if (!dc) {
            nsCOMPtr<nsIDeviceContext> dc = do_CreateInstance(kDeviceContextCID);
            // no parent widget to initialize with
            dc->Init(nsnull);
        }

        Display* dpy = GDK_DISPLAY();
        int defaultScreen = gdk_x11_get_default_screen();
        glitz_drawable_format_t* format = glitz_glx_find_window_format (dpy, defaultScreen,
                                                                        0, NULL, 0);
        if (format) {
            XVisualInfo* vinfo = glitz_glx_get_visual_info_from_format(dpy, defaultScreen, format);
            GdkScreen* screen = gdk_display_get_screen(gdk_x11_lookup_xdisplay(dpy), defaultScreen);
            visual = gdk_x11_screen_lookup_visual(screen, vinfo->visualid);
        } else {
            // couldn't find a GLX visual; force Glitz off
            gfxPlatform::SetUseGlitz(PR_FALSE);
        }
    }
#endif

    // ok, create our windows
    switch (mWindowType) {
    case eWindowType_dialog:
    case eWindowType_popup:
    case eWindowType_toplevel:
    case eWindowType_invisible: {
        mIsTopLevel = PR_TRUE;

        nsXPIDLString brandName;
        GetBrandName(brandName);
        NS_ConvertUTF16toUTF8 cBrand(brandName);

        if (mWindowType == eWindowType_dialog) {
            mShell = gtk_window_new(GTK_WINDOW_TOPLEVEL);
            SetDefaultIcon();
            gtk_window_set_wmclass(GTK_WINDOW(mShell), "Dialog", cBrand.get());
            gtk_window_set_type_hint(GTK_WINDOW(mShell),
                                     GDK_WINDOW_TYPE_HINT_DIALOG);
            gtk_window_set_transient_for(GTK_WINDOW(mShell),
                                         topLevelParent);
            mTransientParent = topLevelParent;
            // add ourselves to the parent window's window group
            if (!topLevelParent) {
                gtk_widget_realize(mShell);
                GdkWindow* dialoglead = mShell->window;
                gdk_window_set_group(dialoglead, dialoglead);
            }
            if (parentArea) {
                nsWindow *parentnsWindow =
                    get_window_for_gdk_window(parentArea->inner_window);
                NS_ASSERTION(parentnsWindow,
                             "no nsWindow for parentArea!");
                if (parentnsWindow && parentnsWindow->mWindowGroup) {
                    gtk_window_group_add_window(parentnsWindow->mWindowGroup,
                                                GTK_WINDOW(mShell));
                    // store this in case any children are created
                    mWindowGroup = parentnsWindow->mWindowGroup;
                    g_object_ref(G_OBJECT(mWindowGroup));
                    LOG(("adding window %p to group %p\n",
                         (void *)mShell, (void *)mWindowGroup));
                }
            }
        }
        else if (mWindowType == eWindowType_popup) {
            mShell = gtk_window_new(GTK_WINDOW_POPUP);
            gtk_window_set_wmclass(GTK_WINDOW(mShell), "Popup", cBrand.get());

            if (topLevelParent) {
                gtk_window_set_transient_for(GTK_WINDOW(mShell),
                                            topLevelParent);
                mTransientParent = topLevelParent;

                if (topLevelParent->group) {
                    gtk_window_group_add_window(topLevelParent->group,
                                            GTK_WINDOW(mShell));
                    mWindowGroup = topLevelParent->group;
                    g_object_ref(G_OBJECT(mWindowGroup));
                }
            }
        }
        else { // must be eWindowType_toplevel
            mShell = gtk_window_new(GTK_WINDOW_TOPLEVEL);
            SetDefaultIcon();
            gtk_window_set_wmclass(GTK_WINDOW(mShell), "Toplevel", cBrand.get());

            // each toplevel window gets its own window group
            mWindowGroup = gtk_window_group_new();

            // and add ourselves to the window group
            LOG(("adding window %p to new group %p\n",
                 (void *)mShell, (void *)mWindowGroup));
            gtk_window_group_add_window(mWindowGroup, GTK_WINDOW(mShell));
        }

        // create our container
        mContainer = MOZ_CONTAINER(moz_container_new());
        gtk_container_add(GTK_CONTAINER(mShell), GTK_WIDGET(mContainer));
        gtk_widget_realize(GTK_WIDGET(mContainer));

        // make sure this is the focus widget in the container
        gtk_window_set_focus(GTK_WINDOW(mShell), GTK_WIDGET(mContainer));

        // and the drawing area
        mDrawingarea = moz_drawingarea_new(nsnull, mContainer, visual);

        if (mWindowType == eWindowType_popup) {
            // gdk does not automatically set the cursor for "temporary"
            // windows, which are what gtk uses for popups.

            mCursor = eCursor_wait; // force SetCursor to actually set the
                                    // cursor, even though our internal state
                                    // indicates that we already have the
                                    // standard cursor.
            SetCursor(eCursor_standard);
        }
    }
        break;
    case eWindowType_child: {
        if (parentMozContainer) {
            mDrawingarea = moz_drawingarea_new(parentArea, parentMozContainer, visual);
        }
        else if (parentGtkContainer) {
            mContainer = MOZ_CONTAINER(moz_container_new());
            gtk_container_add(parentGtkContainer, GTK_WIDGET(mContainer));
            gtk_widget_realize(GTK_WIDGET(mContainer));

            mDrawingarea = moz_drawingarea_new(nsnull, mContainer, visual);
        }
        else {
            NS_WARNING("Warning: tried to create a new child widget with no parent!");
            return NS_ERROR_FAILURE;
        }
    }
        break;
    default:
        break;
    }
    // Disable the double buffer because it will make the caret crazy
    // For bug#153805 (Gtk2 double buffer makes carets misbehave)
    if (mContainer)
        gtk_widget_set_double_buffered (GTK_WIDGET(mContainer),FALSE);

    // label the drawing area with this object so we can find our way
    // home
    g_object_set_data(G_OBJECT(mDrawingarea->clip_window), "nsWindow",
                      this);
    g_object_set_data(G_OBJECT(mDrawingarea->inner_window), "nsWindow",
                      this);

    g_object_set_data(G_OBJECT(mDrawingarea->clip_window), "mozdrawingarea",
                      mDrawingarea);
    g_object_set_data(G_OBJECT(mDrawingarea->inner_window), "mozdrawingarea",
                      mDrawingarea);

    if (mContainer)
        g_object_set_data(G_OBJECT(mContainer), "nsWindow", this);

    if (mShell)
        g_object_set_data(G_OBJECT(mShell), "nsWindow", this);

    // attach listeners for events
    if (mShell) {
        g_signal_connect(G_OBJECT(mShell), "configure_event",
                         G_CALLBACK(configure_event_cb), NULL);
        g_signal_connect(G_OBJECT(mShell), "delete_event",
                         G_CALLBACK(delete_event_cb), NULL);
        g_signal_connect(G_OBJECT(mShell), "window_state_event",
                         G_CALLBACK(window_state_event_cb), NULL);

        GtkSettings* default_settings = gtk_settings_get_default();
        g_signal_connect_after(default_settings,
                               "notify::gtk-theme-name",
                               G_CALLBACK(theme_changed_cb), this);
        g_signal_connect_after(default_settings,
                               "notify::gtk-font-name",
                               G_CALLBACK(theme_changed_cb), this);
    }

    if (mContainer) {
        g_signal_connect_after(G_OBJECT(mContainer), "size_allocate",
                               G_CALLBACK(size_allocate_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "expose_event",
                         G_CALLBACK(expose_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "enter_notify_event",
                         G_CALLBACK(enter_notify_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "leave_notify_event",
                         G_CALLBACK(leave_notify_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "motion_notify_event",
                         G_CALLBACK(motion_notify_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "button_press_event",
                         G_CALLBACK(button_press_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "button_release_event",
                         G_CALLBACK(button_release_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "focus_in_event",
                         G_CALLBACK(focus_in_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "focus_out_event",
                         G_CALLBACK(focus_out_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "key_press_event",
                         G_CALLBACK(key_press_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "key_release_event",
                         G_CALLBACK(key_release_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "scroll_event",
                         G_CALLBACK(scroll_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "visibility_notify_event",
                         G_CALLBACK(visibility_notify_event_cb), NULL);

        gtk_drag_dest_set((GtkWidget *)mContainer,
                          (GtkDestDefaults)0,
                          NULL,
                          0,
                          (GdkDragAction)0);

        g_signal_connect(G_OBJECT(mContainer), "drag_motion",
                         G_CALLBACK(drag_motion_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "drag_leave",
                         G_CALLBACK(drag_leave_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "drag_drop",
                         G_CALLBACK(drag_drop_event_cb), NULL);
        g_signal_connect(G_OBJECT(mContainer), "drag_data_received",
                         G_CALLBACK(drag_data_received_event_cb), NULL);

#ifdef USE_XIM
        // We create input contexts for all containers, except for
        // toplevel popup windows
        if (mWindowType != eWindowType_popup)
            IMECreateContext();
#endif
    }

    LOG(("nsWindow [%p]\n", (void *)this));
    if (mShell) {
        LOG(("\tmShell %p %p %lx\n", (void *)mShell, (void *)mShell->window,
             GDK_WINDOW_XWINDOW(mShell->window)));
    }

    if (mContainer) {
        LOG(("\tmContainer %p %p %lx\n", (void *)mContainer,
             (void *)GTK_WIDGET(mContainer)->window,
             GDK_WINDOW_XWINDOW(GTK_WIDGET(mContainer)->window)));
    }

    if (mDrawingarea) {
        LOG(("\tmDrawingarea %p %p %p %lx %lx\n", (void *)mDrawingarea,
             (void *)mDrawingarea->clip_window,
             (void *)mDrawingarea->inner_window,
             GDK_WINDOW_XWINDOW(mDrawingarea->clip_window),
             GDK_WINDOW_XWINDOW(mDrawingarea->inner_window)));
    }

    // resize so that everything is set to the right dimensions
    if (!mIsTopLevel)
        Resize(mBounds.x, mBounds.y, mBounds.width, mBounds.height, PR_FALSE);

#ifdef ACCESSIBILITY
    nsresult rv;
    if (!sAccessibilityChecked) {
        sAccessibilityChecked = PR_TRUE;

        //check if accessibility enabled/disabled by environment variable
        const char *envValue = PR_GetEnv(sAccEnv);
        if (envValue) {
            sAccessibilityEnabled = atoi(envValue);
            LOG(("Accessibility Env %s=%s\n", sAccEnv, envValue));
        }
        //check gconf-2 setting
        else {
            nsCOMPtr<nsIPrefBranch> sysPrefService =
                do_GetService(sSysPrefService, &rv);
            if (NS_SUCCEEDED(rv) && sysPrefService) {

                // do the work to get gconf setting.
                // will be done soon later.
                sysPrefService->GetBoolPref(sAccessibilityKey,
                                            &sAccessibilityEnabled);
            }

        }
    }
    if (sAccessibilityEnabled) {
        LOG(("nsWindow:: Create Toplevel Accessibility\n"));
        CreateRootAccessible();
    }
#endif

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::SetWindowClass(const nsAString &xulWinType)
{
  if (!mShell)
    return NS_ERROR_FAILURE;

  nsXPIDLString brandName;
  GetBrandName(brandName);

  XClassHint *class_hint = XAllocClassHint();
  if (!class_hint)
    return NS_ERROR_OUT_OF_MEMORY;
  const char *role = NULL;
  class_hint->res_name = ToNewCString(xulWinType);
  if (!class_hint->res_name) {
    XFree(class_hint);
    return NS_ERROR_OUT_OF_MEMORY;
  }
  class_hint->res_class = ToNewCString(brandName);
  if (!class_hint->res_class) {
    nsMemory::Free(class_hint->res_name);
    XFree(class_hint);
    return NS_ERROR_OUT_OF_MEMORY;
  }

  // Parse res_name into a name and role. Characters other than
  // [A-Za-z0-9_-] are converted to '_'. Anything after the first
  // colon is assigned to role; if there's no colon, assign the
  // whole thing to both role and res_name.
  for (char *c = class_hint->res_name; *c; c++) {
    if (':' == *c) {
      *c = 0;
      role = c + 1;
    }
    else if (!isascii(*c) || (!isalnum(*c) && ('_' != *c) && ('-' != *c)))
      *c = '_';
  }
  class_hint->res_name[0] = toupper(class_hint->res_name[0]);
  if (!role) role = class_hint->res_name;

  gdk_window_set_role(GTK_WIDGET(mShell)->window, role);
  // Can't use gtk_window_set_wmclass() for this; it prints
  // a warning & refuses to make the change.
  XSetClassHint(GDK_DISPLAY(),
                GDK_WINDOW_XWINDOW(GTK_WIDGET(mShell)->window),
                class_hint);
  nsMemory::Free(class_hint->res_class);
  nsMemory::Free(class_hint->res_name);
  XFree(class_hint);
  return NS_OK;
}

void
nsWindow::NativeResize(PRInt32 aWidth, PRInt32 aHeight, PRBool  aRepaint)
{
    LOG(("nsWindow::NativeResize [%p] %d %d\n", (void *)this,
         aWidth, aHeight));

    ResizeTransparencyBitmap(aWidth, aHeight);

    // clear our resize flag
    mNeedsResize = PR_FALSE;

    if (mIsTopLevel) {
        gtk_window_resize(GTK_WINDOW(mShell), aWidth, aHeight);
    }
    else if (mContainer) {
        GtkAllocation allocation;
        allocation.x = 0;
        allocation.y = 0;
        allocation.width = aWidth;
        allocation.height = aHeight;
        gtk_widget_size_allocate(GTK_WIDGET(mContainer), &allocation);
    }

    moz_drawingarea_resize (mDrawingarea, aWidth, aHeight);
}

void
nsWindow::NativeResize(PRInt32 aX, PRInt32 aY,
                       PRInt32 aWidth, PRInt32 aHeight,
                       PRBool  aRepaint)
{
    mNeedsResize = PR_FALSE;
    mNeedsMove = PR_FALSE;

    LOG(("nsWindow::NativeResize [%p] %d %d %d %d\n", (void *)this,
         aX, aY, aWidth, aHeight));

    ResizeTransparencyBitmap(aWidth, aHeight);

    if (mIsTopLevel) {
        if (mParent && mWindowType == eWindowType_popup) {
            nsRect oldrect, newrect;
            oldrect.x = aX;
            oldrect.y = aY;
            mParent->WidgetToScreen(oldrect, newrect);
            moz_drawingarea_resize(mDrawingarea, aWidth, aHeight);
            gtk_window_move(GTK_WINDOW(mShell), newrect.x, newrect.y);
            gtk_window_resize(GTK_WINDOW(mShell), aWidth, aHeight);
        }
        else {
            // We only move the toplevel window if someone has
            // actually placed the window somewhere.  If no placement
            // has taken place, we just let the window manager Do The
            // Right Thing.
            if (mPlaced)
                gtk_window_move(GTK_WINDOW(mShell), aX, aY);

            gtk_window_resize(GTK_WINDOW(mShell), aWidth, aHeight);
            moz_drawingarea_resize(mDrawingarea, aWidth, aHeight);
        }
    }
    else if (mContainer) {
        GtkAllocation allocation;
        allocation.x = 0;
        allocation.y = 0;
        allocation.width = aWidth;
        allocation.height = aHeight;
        gtk_widget_size_allocate(GTK_WIDGET(mContainer), &allocation);
        moz_drawingarea_move_resize(mDrawingarea, aX, aY, aWidth, aHeight);
    }
    else if (mDrawingarea) {
        moz_drawingarea_move_resize(mDrawingarea, aX, aY, aWidth, aHeight);
    }
}

void
nsWindow::NativeShow (PRBool  aAction)
{
    if (aAction) {
        // GTK wants us to set the window mask before we show the window
        // for the first time, or setting the mask later won't work.
        // GTK also wants us to NOT set the window mask if we're not really
        // going to need it, because GTK won't let us unset the mask properly
        // later.
        // So, we delay setting the mask until the last moment: when the window
        // is shown.
        // XXX that may or may not be true for GTK+ 2.x
        if (mTransparencyBitmap) {
            ApplyTransparencyBitmap();
        }

        // unset our flag now that our window has been shown
        mNeedsShow = PR_FALSE;

        if (mIsTopLevel) {
            // Set up usertime/startupID metadata for the created window.
            if (mWindowType != eWindowType_invisible) {
                SetUserTimeAndStartupIDForActivatedWindow(mShell);
            }

            moz_drawingarea_set_visibility(mDrawingarea, aAction);
            gtk_widget_show(GTK_WIDGET(mContainer));
            gtk_widget_show(mShell);
        }
        else if (mContainer) {
            moz_drawingarea_set_visibility(mDrawingarea, TRUE);
            gtk_widget_show(GTK_WIDGET(mContainer));
        }
        else if (mDrawingarea) {
            moz_drawingarea_set_visibility(mDrawingarea, TRUE);
        }
    }
    else {
        if (mIsTopLevel) {
            gtk_widget_hide(GTK_WIDGET(mShell));
            gtk_widget_hide(GTK_WIDGET(mContainer));
        }
        else if (mContainer) {
            gtk_widget_hide(GTK_WIDGET(mContainer));
            moz_drawingarea_set_visibility(mDrawingarea, FALSE);
        }
        if (mDrawingarea) {
            moz_drawingarea_set_visibility(mDrawingarea, FALSE);
        }
    }
}

void
nsWindow::EnsureGrabs(void)
{
    if (mRetryPointerGrab)
        GrabPointer();
    if (mRetryKeyboardGrab)
        GrabKeyboard();
}

#ifndef MOZ_XUL
void
nsWindow::ResizeTransparencyBitmap(PRInt32 aNewWidth, PRInt32 aNewHeight)
{
}

void
nsWindow::ApplyTransparencyBitmap()
{
}
#else
NS_IMETHODIMP
nsWindow::SetWindowTranslucency(PRBool aTranslucent)
{
    if (!mShell) {
        // Pass the request to the toplevel window
        GtkWidget *topWidget = nsnull;
        GetToplevelWidget(&topWidget);
        if (!topWidget)
            return NS_ERROR_FAILURE;

        nsWindow *topWindow = get_window_for_gtk_widget(topWidget);
        if (!topWindow)
            return NS_ERROR_FAILURE;

        return topWindow->SetWindowTranslucency(aTranslucent);
    }

    if (mIsTranslucent == aTranslucent)
        return NS_OK;

    if (!aTranslucent) {
        if (mTransparencyBitmap) {
            delete[] mTransparencyBitmap;
            mTransparencyBitmap = nsnull;
            mTransparencyBitmapWidth = 0;
            mTransparencyBitmapHeight = 0;
            gtk_widget_reset_shapes(mShell);
        }
    } // else the new default alpha values are "all 1", so we don't
    // need to change anything yet

    mIsTranslucent = aTranslucent;
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::GetWindowTranslucency(PRBool& aTranslucent)
{
    if (!mShell) {
        // Pass the request to the toplevel window
        GtkWidget *topWidget = nsnull;
        GetToplevelWidget(&topWidget);
        if (!topWidget) {
            aTranslucent = PR_FALSE;
            return NS_ERROR_FAILURE;
        }

        nsWindow *topWindow = get_window_for_gtk_widget(topWidget);
        if (!topWindow) {
            aTranslucent = PR_FALSE;
            return NS_ERROR_FAILURE;
        }

        return topWindow->GetWindowTranslucency(aTranslucent);
    }

    aTranslucent = mIsTranslucent;
    return NS_OK;
}

void
nsWindow::ResizeTransparencyBitmap(PRInt32 aNewWidth, PRInt32 aNewHeight)
{
    if (!mTransparencyBitmap)
        return;

    if (aNewWidth == mTransparencyBitmapWidth &&
        aNewHeight == mTransparencyBitmapHeight)
        return;

    PRInt32 newSize = ((aNewWidth+7)/8)*aNewHeight;
    gchar* newBits = new gchar[newSize];
    if (!newBits) {
        delete[] mTransparencyBitmap;
        mTransparencyBitmap = nsnull;
        mTransparencyBitmapWidth = 0;
        mTransparencyBitmapHeight = 0;
        return;
    }
    // fill new mask with "opaque", first
    memset(newBits, 255, newSize);

    // Now copy the intersection of the old and new areas into the new mask
    PRInt32 copyWidth = PR_MIN(aNewWidth, mTransparencyBitmapWidth);
    PRInt32 copyHeight = PR_MIN(aNewHeight, mTransparencyBitmapHeight);
    PRInt32 oldRowBytes = (mTransparencyBitmapWidth+7)/8;
    PRInt32 newRowBytes = (aNewWidth+7)/8;
    PRInt32 copyBytes = (copyWidth+7)/8;

    PRInt32 i;
    gchar* fromPtr = mTransparencyBitmap;
    gchar* toPtr = newBits;
    for (i = 0; i < copyHeight; i++) {
        memcpy(toPtr, fromPtr, copyBytes);
        fromPtr += oldRowBytes;
        toPtr += newRowBytes;
    }

    delete[] mTransparencyBitmap;
    mTransparencyBitmap = newBits;
    mTransparencyBitmapWidth = aNewWidth;
    mTransparencyBitmapHeight = aNewHeight;
}

static PRBool
ChangedMaskBits(gchar* aMaskBits, PRInt32 aMaskWidth, PRInt32 aMaskHeight,
        const nsRect& aRect, PRUint8* aAlphas, PRInt32 aStride)
{
    PRInt32 x, y, xMax = aRect.XMost(), yMax = aRect.YMost();
    PRInt32 maskBytesPerRow = (aMaskWidth + 7)/8;
    for (y = aRect.y; y < yMax; y++) {
        gchar* maskBytes = aMaskBits + y*maskBytesPerRow;
        PRUint8* alphas = aAlphas;
        for (x = aRect.x; x < xMax; x++) {
            PRBool newBit = *alphas > 0;
            alphas++;

            gchar maskByte = maskBytes[x >> 3];
            PRBool maskBit = (maskByte & (1 << (x & 7))) != 0;

            if (maskBit != newBit) {
                return PR_TRUE;
            }
        }
        aAlphas += aStride;
    }

    return PR_FALSE;
}

static
void UpdateMaskBits(gchar* aMaskBits, PRInt32 aMaskWidth, PRInt32 aMaskHeight,
        const nsRect& aRect, PRUint8* aAlphas, PRInt32 aStride)
{
    PRInt32 x, y, xMax = aRect.XMost(), yMax = aRect.YMost();
    PRInt32 maskBytesPerRow = (aMaskWidth + 7)/8;
    for (y = aRect.y; y < yMax; y++) {
        gchar* maskBytes = aMaskBits + y*maskBytesPerRow;
        PRUint8* alphas = aAlphas;
        for (x = aRect.x; x < xMax; x++) {
            PRBool newBit = *alphas > 0;
            alphas++;

            gchar mask = 1 << (x & 7);
            gchar maskByte = maskBytes[x >> 3];
            // Note: '-newBit' turns 0 into 00...00 and 1 into 11...11
            maskBytes[x >> 3] = (maskByte & ~mask) | (-newBit & mask);
        }
        aAlphas += aStride;
    }
}

void
nsWindow::ApplyTransparencyBitmap()
{
    gtk_widget_reset_shapes(mShell);
    GdkBitmap* maskBitmap = gdk_bitmap_create_from_data(mShell->window,
            mTransparencyBitmap,
            mTransparencyBitmapWidth, mTransparencyBitmapHeight);
    if (!maskBitmap)
        return;

    gtk_widget_shape_combine_mask(mShell, maskBitmap, 0, 0);
    gdk_bitmap_unref(maskBitmap);
}

nsresult
nsWindow::UpdateTranslucentWindowAlphaInternal(const nsRect& aRect,
                                               PRUint8* aAlphas, PRInt32 aStride)
{
    if (!mShell) {
        // Pass the request to the toplevel window
        GtkWidget *topWidget = nsnull;
        GetToplevelWidget(&topWidget);
        if (!topWidget)
            return NS_ERROR_FAILURE;

        nsWindow *topWindow = get_window_for_gtk_widget(topWidget);
        if (!topWindow)
            return NS_ERROR_FAILURE;

        return topWindow->UpdateTranslucentWindowAlphaInternal(aRect, aAlphas, aStride);
    }

    NS_ASSERTION(mIsTranslucent, "Window is not transparent");

    if (mTransparencyBitmap == nsnull) {
        PRInt32 size = ((mBounds.width+7)/8)*mBounds.height;
        mTransparencyBitmap = new gchar[size];
        if (mTransparencyBitmap == nsnull)
            return NS_ERROR_FAILURE;
        memset(mTransparencyBitmap, 255, size);
        mTransparencyBitmapWidth = mBounds.width;
        mTransparencyBitmapHeight = mBounds.height;
    }

    NS_ASSERTION(aRect.x >= 0 && aRect.y >= 0
            && aRect.XMost() <= mBounds.width && aRect.YMost() <= mBounds.height,
            "Rect is out of window bounds");

    if (!ChangedMaskBits(mTransparencyBitmap, mBounds.width, mBounds.height,
                         aRect, aAlphas, aStride))
        // skip the expensive stuff if the mask bits haven't changed; hopefully
        // this is the common case
        return NS_OK;

    UpdateMaskBits(mTransparencyBitmap, mBounds.width, mBounds.height,
                   aRect, aAlphas, aStride);

    if (!mNeedsShow) {
        ApplyTransparencyBitmap();
    }
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::UpdateTranslucentWindowAlpha(const nsRect& aRect, PRUint8* aAlphas)
{
    return UpdateTranslucentWindowAlphaInternal(aRect, aAlphas, aRect.width);
}
#endif

void
nsWindow::GrabPointer(void)
{
    LOG(("GrabPointer %d\n", mRetryPointerGrab));

    mRetryPointerGrab = PR_FALSE;

    // If the window isn't visible, just set the flag to retry the
    // grab.  When this window becomes visible, the grab will be
    // retried.
    PRBool visibility = PR_TRUE;
    IsVisible(visibility);
    if (!visibility) {
        LOG(("GrabPointer: window not visible\n"));
        mRetryPointerGrab = PR_TRUE;
        return;
    }

    if (!mDrawingarea)
        return;

    gint retval;
    retval = gdk_pointer_grab(mDrawingarea->inner_window, TRUE,
                              (GdkEventMask)(GDK_BUTTON_PRESS_MASK |
                                             GDK_BUTTON_RELEASE_MASK |
                                             GDK_ENTER_NOTIFY_MASK |
                                             GDK_LEAVE_NOTIFY_MASK |
                                             GDK_POINTER_MOTION_MASK),
                              (GdkWindow *)NULL, NULL, GDK_CURRENT_TIME);

    if (retval != GDK_GRAB_SUCCESS) {
        LOG(("GrabPointer: pointer grab failed\n"));
        mRetryPointerGrab = PR_TRUE;
    }
}

void
nsWindow::GrabKeyboard(void)
{
    LOG(("GrabKeyboard %d\n", mRetryKeyboardGrab));

    mRetryKeyboardGrab = PR_FALSE;

    // If the window isn't visible, just set the flag to retry the
    // grab.  When this window becomes visible, the grab will be
    // retried.
    PRBool visibility = PR_TRUE;
    IsVisible(visibility);
    if (!visibility) {
        LOG(("GrabKeyboard: window not visible\n"));
        mRetryKeyboardGrab = PR_TRUE;
        return;
    }

    // we need to grab the keyboard on the transient parent so that we
    // don't end up with any focus events that end up on the parent
    // window that will cause the popup to go away
    GdkWindow *grabWindow;

    if (mTransientParent)
        grabWindow = GTK_WIDGET(mTransientParent)->window;
    else if (mDrawingarea)
        grabWindow = mDrawingarea->inner_window;
    else
        return;

    gint retval;
    retval = gdk_keyboard_grab(grabWindow, TRUE, GDK_CURRENT_TIME);

    if (retval != GDK_GRAB_SUCCESS) {
        LOG(("GrabKeyboard: keyboard grab failed %d\n", retval));
        gdk_pointer_ungrab(GDK_CURRENT_TIME);
        mRetryKeyboardGrab = PR_TRUE;
    }
}

void
nsWindow::ReleaseGrabs(void)
{
    LOG(("ReleaseGrabs\n"));

    mRetryPointerGrab = PR_FALSE;
    mRetryKeyboardGrab = PR_FALSE;

    gdk_pointer_ungrab(GDK_CURRENT_TIME);
    gdk_keyboard_ungrab(GDK_CURRENT_TIME);
}

void
nsWindow::GetToplevelWidget(GtkWidget **aWidget)
{
    *aWidget = nsnull;

    if (mShell) {
        *aWidget = mShell;
        return;
    }

    if (!mDrawingarea)
        return;

    GtkWidget *widget =
        get_gtk_widget_for_gdk_window(mDrawingarea->inner_window);
    if (!widget)
        return;

    *aWidget = gtk_widget_get_toplevel(widget);
}

void
nsWindow::GetContainerWindow(nsWindow **aWindow)
{
    if (!mDrawingarea)
        return;

    GtkWidget *owningWidget =
        get_gtk_widget_for_gdk_window(mDrawingarea->inner_window);

    *aWindow = get_window_for_gtk_widget(owningWidget);
}

void
nsWindow::SetUrgencyHint(GtkWidget *top_window, PRBool state)
{
    if (!top_window)
        return;

    // Try to get a pointer to gdk_window_set_urgency_hint
    PRLibrary* lib;
    _gdk_window_set_urgency_hint_fn _gdk_window_set_urgency_hint = nsnull;
    _gdk_window_set_urgency_hint = (_gdk_window_set_urgency_hint_fn)
           PR_FindFunctionSymbolAndLibrary("gdk_window_set_urgency_hint", &lib);

    if (_gdk_window_set_urgency_hint) {
        _gdk_window_set_urgency_hint(top_window->window, state);
        PR_UnloadLibrary(lib);
    }
    else if (state) {
        gdk_window_show_unraised(top_window->window);
    }
}

void *
nsWindow::SetupPluginPort(void)
{
    if (!mDrawingarea)
        return nsnull;

    if (GDK_WINDOW_OBJECT(mDrawingarea->inner_window)->destroyed == TRUE)
        return nsnull;

    // we have to flush the X queue here so that any plugins that
    // might be running on separate X connections will be able to use
    // this window in case it was just created
    XWindowAttributes xattrs;
    XGetWindowAttributes(GDK_DISPLAY (),
                         GDK_WINDOW_XWINDOW(mDrawingarea->inner_window),
                         &xattrs);
    XSelectInput (GDK_DISPLAY (),
                  GDK_WINDOW_XWINDOW(mDrawingarea->inner_window),
                  xattrs.your_event_mask |
                  SubstructureNotifyMask);

    gdk_window_add_filter(mDrawingarea->inner_window,
                          plugin_window_filter_func,
                          this);

    XSync(GDK_DISPLAY(), False);

    return (void *)GDK_WINDOW_XWINDOW(mDrawingarea->inner_window);
}

nsresult
nsWindow::SetWindowIconList(const nsCStringArray &aIconList)
{
    GList *list = NULL;

    for (int i = 0; i < aIconList.Count(); ++i) {
        const char *path = aIconList[i]->get();
        LOG(("window [%p] Loading icon from %s\n", (void *)this, path));

        GdkPixbuf *icon = gdk_pixbuf_new_from_file(path, NULL);
        if (!icon)
            continue;

        list = g_list_append(list, icon);
    }

    if (!list)
        return NS_ERROR_FAILURE;

    gtk_window_set_icon_list(GTK_WINDOW(mShell), list);

    g_list_foreach(list, (GFunc) g_object_unref, NULL);
    g_list_free(list);

    return NS_OK;
}

void
nsWindow::SetDefaultIcon(void)
{
    // Set up the default window icon
    nsCOMPtr<nsILocalFile> iconFile;
    ResolveIconName(NS_LITERAL_STRING("default"),
                    NS_LITERAL_STRING(".xpm"),
                    getter_AddRefs(iconFile));
    if (!iconFile) {
        NS_WARNING("default.xpm not found");
        return;
    }

    nsCAutoString path;
    iconFile->GetNativePath(path);

    nsCStringArray iconList;
    iconList.AppendCString(path);

    SetWindowIconList(iconList);
}

void
nsWindow::SetPluginType(PluginType aPluginType)
{
    mPluginType = aPluginType;
}

void
nsWindow::SetNonXEmbedPluginFocus()
{
    if (gPluginFocusWindow == this || mPluginType!=PluginType_NONXEMBED) {
        return;
    }

    if (gPluginFocusWindow) {
        nsRefPtr<nsWindow> kungFuDeathGrip = gPluginFocusWindow;
        gPluginFocusWindow->LoseNonXEmbedPluginFocus();
    }

    LOGFOCUS(("nsWindow::SetNonXEmbedPluginFocus\n"));

    Window curFocusWindow;
    int focusState;

    XGetInputFocus(GDK_WINDOW_XDISPLAY(mDrawingarea->inner_window),
                   &curFocusWindow,
                   &focusState);

    LOGFOCUS(("\t curFocusWindow=%p\n", curFocusWindow));

    GdkWindow* toplevel = gdk_window_get_toplevel
                                (mDrawingarea->inner_window);
    GdkWindow *gdkfocuswin = gdk_window_lookup(curFocusWindow);

    // lookup with the focus proxy window is supposed to get the
    // same GdkWindow as toplevel. If the current focused window
    // is not the focus proxy, we return without any change.
    if (gdkfocuswin != toplevel) {
        return;
    }

    // switch the focus from the focus proxy to the plugin window
    mOldFocusWindow = curFocusWindow;
    XRaiseWindow(GDK_WINDOW_XDISPLAY(mDrawingarea->inner_window),
                 GDK_WINDOW_XWINDOW(mDrawingarea->inner_window));
    gdk_error_trap_push();
    XSetInputFocus(GDK_WINDOW_XDISPLAY(mDrawingarea->inner_window),
                   GDK_WINDOW_XWINDOW(mDrawingarea->inner_window),
                   RevertToNone,
                   CurrentTime);
    gdk_flush();
    gdk_error_trap_pop();
    gPluginFocusWindow = this;
    gdk_window_add_filter(NULL, plugin_client_message_filter, this);

    LOGFOCUS(("nsWindow::SetNonXEmbedPluginFocus oldfocus=%p new=%p\n",
                mOldFocusWindow,
                GDK_WINDOW_XWINDOW(mDrawingarea->inner_window)));
}

void
nsWindow::LoseNonXEmbedPluginFocus()
{
    LOGFOCUS(("nsWindow::LoseNonXEmbedPluginFocus\n"));

    // This method is only for the nsWindow which contains a
    // Non-XEmbed plugin, for example, JAVA plugin.
    if (gPluginFocusWindow != this || mPluginType!=PluginType_NONXEMBED) {
        return;
    }

    Window curFocusWindow;
    int focusState;

    XGetInputFocus(GDK_WINDOW_XDISPLAY(mDrawingarea->inner_window),
                   &curFocusWindow,
                   &focusState);

    // we only switch focus between plugin window and focus proxy. If the
    // current focused window is not the plugin window, just removing the
    // event filter that blocks the WM_TAKE_FOCUS is enough. WM and gtk2
    // will take care of the focus later.
    if (!curFocusWindow ||
        curFocusWindow == GDK_WINDOW_XWINDOW(mDrawingarea->inner_window)) {

        gdk_error_trap_push();
        XRaiseWindow(GDK_WINDOW_XDISPLAY(mDrawingarea->inner_window),
                     mOldFocusWindow);
        XSetInputFocus(GDK_WINDOW_XDISPLAY(mDrawingarea->inner_window),
                       mOldFocusWindow,
                       RevertToParent,
                       CurrentTime);
        gdk_flush();
        gdk_error_trap_pop();
    }
    gPluginFocusWindow = NULL;
    mOldFocusWindow = 0;
    gdk_window_remove_filter(NULL, plugin_client_message_filter, this);

    LOGFOCUS(("nsWindow::LoseNonXEmbedPluginFocus end\n"));
}


gint
nsWindow::ConvertBorderStyles(nsBorderStyle aStyle)
{
    gint w = 0;

    if (aStyle == eBorderStyle_default)
        return -1;

    if (aStyle & eBorderStyle_all)
        w |= GDK_DECOR_ALL;
    if (aStyle & eBorderStyle_border)
        w |= GDK_DECOR_BORDER;
    if (aStyle & eBorderStyle_resizeh)
        w |= GDK_DECOR_RESIZEH;
    if (aStyle & eBorderStyle_title)
        w |= GDK_DECOR_TITLE;
    if (aStyle & eBorderStyle_menu)
        w |= GDK_DECOR_MENU;
    if (aStyle & eBorderStyle_minimize)
        w |= GDK_DECOR_MINIMIZE;
    if (aStyle & eBorderStyle_maximize)
        w |= GDK_DECOR_MAXIMIZE;
    if (aStyle & eBorderStyle_close) {
#ifdef DEBUG
        printf("we don't handle eBorderStyle_close yet... please fix me\n");
#endif /* DEBUG */
    }

    return w;
}

NS_IMETHODIMP
nsWindow::MakeFullScreen(PRBool aFullScreen)
{
#if GTK_CHECK_VERSION(2,2,0)
    if (aFullScreen)
        gdk_window_fullscreen (mShell->window);
    else
        gdk_window_unfullscreen (mShell->window);
#else
    HideWindowChrome(aFullScreen);
#endif
    return MakeFullScreenInternal(aFullScreen);
}

NS_IMETHODIMP
nsWindow::HideWindowChrome(PRBool aShouldHide)
{
    if (!mShell) {
        // Pass the request to the toplevel window
        GtkWidget *topWidget = nsnull;
        GetToplevelWidget(&topWidget);
        nsWindow *topWindow = get_window_for_gtk_widget(topWidget);
        return topWindow->HideWindowChrome(aShouldHide);
    }

    // Sawfish, metacity, and presumably other window managers get
    // confused if we change the window decorations while the window
    // is visible.
    gdk_window_hide(mShell->window);

    gint wmd;
    if (aShouldHide)
        wmd = 0;
    else
        wmd = ConvertBorderStyles(mBorderStyle);

    gdk_window_set_decorations(mShell->window, (GdkWMDecoration) wmd);

    gdk_window_show(mShell->window);

    // For some window managers, adding or removing window decorations
    // requires unmapping and remapping our toplevel window.  Go ahead
    // and flush the queue here so that we don't end up with a BadWindow
    // error later when this happens (when the persistence timer fires
    // and GetWindowPos is called)
    XSync(GDK_DISPLAY(), False);

    return NS_OK;
}

PRBool
check_for_rollup(GdkWindow *aWindow, gdouble aMouseX, gdouble aMouseY,
                 PRBool aIsWheel)
{
    PRBool retVal = PR_FALSE;
    nsCOMPtr<nsIWidget> rollupWidget = do_QueryReferent(gRollupWindow);

    if (rollupWidget && gRollupListener) {
        GdkWindow *currentPopup =
            (GdkWindow *)rollupWidget->GetNativeData(NS_NATIVE_WINDOW);
        if (!is_mouse_in_window(currentPopup, aMouseX, aMouseY)) {
            PRBool rollup = PR_TRUE;
            if (aIsWheel) {
                gRollupListener->ShouldRollupOnMouseWheelEvent(&rollup);
                retVal = PR_TRUE;
            }
            // if we're dealing with menus, we probably have submenus and
            // we don't want to rollup if the clickis in a parent menu of
            // the current submenu
            nsCOMPtr<nsIMenuRollup> menuRollup;
            menuRollup = (do_QueryInterface(gRollupListener));
            if (menuRollup) {
                nsCOMPtr<nsISupportsArray> widgetChain;
                menuRollup->GetSubmenuWidgetChain(getter_AddRefs(widgetChain));
                if (widgetChain) {
                    PRUint32 count = 0;
                    widgetChain->Count(&count);
                    for (PRUint32 i=0; i<count; ++i) {
                        nsCOMPtr<nsISupports> genericWidget;
                        widgetChain->GetElementAt(i,
                                                  getter_AddRefs(genericWidget));
                        nsCOMPtr<nsIWidget> widget(do_QueryInterface(genericWidget));
                        if (widget) {
                            GdkWindow* currWindow =
                                (GdkWindow*) widget->GetNativeData(NS_NATIVE_WINDOW);
                            if (is_mouse_in_window(currWindow, aMouseX, aMouseY)) {
                                rollup = PR_FALSE;
                                break;
                            }
                        }
                    } // foreach parent menu widget
                }
            } // if rollup listener knows about menus

            // if we've determined that we should still rollup, do it.
            if (rollup) {
                gRollupListener->Rollup();
                retVal = PR_TRUE;
            }
        }
    } else {
        gRollupWindow = nsnull;
        gRollupListener = nsnull;
    }

    return retVal;
}

/* static */
PRBool
nsWindow::DragInProgress(void)
{
    // mLastDragMotionWindow means the drag arrow is over mozilla
    // sIsDraggingOutOf means the drag arrow is out of mozilla
    // both cases mean the dragging is happenning.
    return (mLastDragMotionWindow || sIsDraggingOutOf);
}

/* static */
PRBool
is_mouse_in_window (GdkWindow* aWindow, gdouble aMouseX, gdouble aMouseY)
{
    gint x = 0;
    gint y = 0;
    gint w, h;

    gint offsetX = 0;
    gint offsetY = 0;

    GtkWidget *widget;
    GdkWindow *window;

    window = aWindow;

    while (window) {
        gint tmpX = 0;
        gint tmpY = 0;

        gdk_window_get_position(window, &tmpX, &tmpY);
        widget = get_gtk_widget_for_gdk_window(window);

        // if this is a window, compute x and y given its origin and our
        // offset
        if (GTK_IS_WINDOW(widget)) {
            x = tmpX + offsetX;
            y = tmpY + offsetY;
            break;
        }

        offsetX += tmpX;
        offsetY += tmpY;
        window = gdk_window_get_parent(window);
    }

    gdk_window_get_size(aWindow, &w, &h);

    if (aMouseX > x && aMouseX < x + w &&
        aMouseY > y && aMouseY < y + h)
        return PR_TRUE;

    return PR_FALSE;
}

/* static */
nsWindow *
get_window_for_gtk_widget(GtkWidget *widget)
{
    gpointer user_data;
    user_data = g_object_get_data(G_OBJECT(widget), "nsWindow");

    if (!user_data)
        return nsnull;

    return static_cast<nsWindow *>(user_data);
}

/* static */
nsWindow *
get_window_for_gdk_window(GdkWindow *window)
{
    gpointer user_data;
    user_data = g_object_get_data(G_OBJECT(window), "nsWindow");

    if (!user_data)
        return nsnull;

    return static_cast<nsWindow *>(user_data);
}

/* static */
nsWindow *
get_owning_window_for_gdk_window(GdkWindow *window)
{
    GtkWidget *owningWidget = get_gtk_widget_for_gdk_window(window);
    if (!owningWidget)
        return nsnull;

    gpointer user_data;
    user_data = g_object_get_data(G_OBJECT(owningWidget), "nsWindow");

    if (!user_data)
        return nsnull;

    return (nsWindow *)user_data;
}

/* static */
GtkWidget *
get_gtk_widget_for_gdk_window(GdkWindow *window)
{
    gpointer user_data = NULL;
    gdk_window_get_user_data(window, &user_data);
    if (!user_data)
        return NULL;

    return GTK_WIDGET(user_data);
}

/* static */
GdkCursor *
get_gtk_cursor(nsCursor aCursor)
{
    GdkPixmap *cursor;
    GdkPixmap *mask;
    GdkColor fg, bg;
    GdkCursor *gdkcursor = nsnull;
    PRUint8 newType = 0xff;

    if ((gdkcursor = gCursorCache[aCursor])) {
        return gdkcursor;
    }

    switch (aCursor) {
    case eCursor_standard:
        gdkcursor = gdk_cursor_new(GDK_LEFT_PTR);
        break;
    case eCursor_wait:
        gdkcursor = gdk_cursor_new(GDK_WATCH);
        break;
    case eCursor_select:
        gdkcursor = gdk_cursor_new(GDK_XTERM);
        break;
    case eCursor_hyperlink:
        gdkcursor = gdk_cursor_new(GDK_HAND2);
        break;
    case eCursor_n_resize:
        gdkcursor = gdk_cursor_new(GDK_TOP_SIDE);
        break;
    case eCursor_s_resize:
        gdkcursor = gdk_cursor_new(GDK_BOTTOM_SIDE);
        break;
    case eCursor_w_resize:
        gdkcursor = gdk_cursor_new(GDK_LEFT_SIDE);
        break;
    case eCursor_e_resize:
        gdkcursor = gdk_cursor_new(GDK_RIGHT_SIDE);
        break;
    case eCursor_nw_resize:
        gdkcursor = gdk_cursor_new(GDK_TOP_LEFT_CORNER);
        break;
    case eCursor_se_resize:
        gdkcursor = gdk_cursor_new(GDK_BOTTOM_RIGHT_CORNER);
        break;
    case eCursor_ne_resize:
        gdkcursor = gdk_cursor_new(GDK_TOP_RIGHT_CORNER);
        break;
    case eCursor_sw_resize:
        gdkcursor = gdk_cursor_new(GDK_BOTTOM_LEFT_CORNER);
        break;
    case eCursor_crosshair:
        gdkcursor = gdk_cursor_new(GDK_CROSSHAIR);
        break;
    case eCursor_move:
        gdkcursor = gdk_cursor_new(GDK_FLEUR);
        break;
    case eCursor_help:
        gdkcursor = gdk_cursor_new(GDK_QUESTION_ARROW);
        break;
    case eCursor_copy: // CSS3
        newType = MOZ_CURSOR_COPY;
        break;
    case eCursor_alias:
        newType = MOZ_CURSOR_ALIAS;
        break;
    case eCursor_context_menu:
        newType = MOZ_CURSOR_CONTEXT_MENU;
        break;
    case eCursor_cell:
        gdkcursor = gdk_cursor_new(GDK_PLUS);
        break;
    case eCursor_grab:
        newType = MOZ_CURSOR_HAND_GRAB;
        break;
    case eCursor_grabbing:
        newType = MOZ_CURSOR_HAND_GRABBING;
        break;
    case eCursor_spinning:
        newType = MOZ_CURSOR_SPINNING;
        break;
    case eCursor_zoom_in:
        newType = MOZ_CURSOR_ZOOM_IN;
        break;
    case eCursor_zoom_out:
        newType = MOZ_CURSOR_ZOOM_OUT;
        break;
    case eCursor_not_allowed:
    case eCursor_no_drop:
        newType = MOZ_CURSOR_NOT_ALLOWED;
        break;
    case eCursor_col_resize:
        newType = MOZ_CURSOR_COL_RESIZE;
        break;
    case eCursor_row_resize:
        newType = MOZ_CURSOR_ROW_RESIZE;
        break;
    case eCursor_vertical_text:
        newType = MOZ_CURSOR_VERTICAL_TEXT;
        break;
    case eCursor_all_scroll:
        gdkcursor = gdk_cursor_new(GDK_FLEUR);
        break;
    case eCursor_nesw_resize:
        newType = MOZ_CURSOR_NESW_RESIZE;
        break;
    case eCursor_nwse_resize:
        newType = MOZ_CURSOR_NWSE_RESIZE;
        break;
    case eCursor_ns_resize:
        gdkcursor = gdk_cursor_new(GDK_SB_V_DOUBLE_ARROW);
        break;
    case eCursor_ew_resize:
        gdkcursor = gdk_cursor_new(GDK_SB_H_DOUBLE_ARROW);
        break;
    default:
        NS_ASSERTION(aCursor, "Invalid cursor type");
        gdkcursor = gdk_cursor_new(GDK_LEFT_PTR);
        break;
    }

    // if by now we don't have a xcursor, this means we have to make a
    // custom one
    if (newType != 0xff) {
        gdk_color_parse("#000000", &fg);
        gdk_color_parse("#ffffff", &bg);

        cursor = gdk_bitmap_create_from_data(NULL,
                                             (char *)GtkCursors[newType].bits,
                                             32, 32);
        mask =
            gdk_bitmap_create_from_data(NULL,
                                        (char *)GtkCursors[newType].mask_bits,
                                        32, 32);

        gdkcursor = gdk_cursor_new_from_pixmap(cursor, mask, &fg, &bg,
                                               GtkCursors[newType].hot_x,
                                               GtkCursors[newType].hot_y);

        gdk_bitmap_unref(mask);
        gdk_bitmap_unref(cursor);
    }

    gCursorCache[aCursor] = gdkcursor;

    return gdkcursor;
}

// gtk callbacks

/* static */
gboolean
expose_event_cb(GtkWidget *widget, GdkEventExpose *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gdk_window(event->window);
    if (!window)
        return FALSE;

    // XXX We are so getting lucky here.  We are doing all of
    // mozilla's painting and then allowing default processing to occur.
    // This means that Mozilla paints in all of it's stuff and then
    // NO_WINDOW widgets (like scrollbars, for example) are painted by
    // Gtk on top of what we painted.

    // This return window->OnExposeEvent(widget, event); */

    window->OnExposeEvent(widget, event);
    return FALSE;
}

/* static */
gboolean
configure_event_cb(GtkWidget *widget,
                   GdkEventConfigure *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(widget);
    if (!window)
        return FALSE;

    return window->OnConfigureEvent(widget, event);
}

/* static */
void
size_allocate_cb (GtkWidget *widget, GtkAllocation *allocation)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(widget);
    if (!window)
        return;

    window->OnSizeAllocate(widget, allocation);
}

/* static */
gboolean
delete_event_cb(GtkWidget *widget, GdkEventAny *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(widget);
    if (!window)
        return FALSE;

    window->OnDeleteEvent(widget, event);

    return TRUE;
}

/* static */
gboolean
enter_notify_event_cb(GtkWidget *widget,
                      GdkEventCrossing *event)
{
    if (is_parent_ungrab_enter(event)) {
        return TRUE;
    }

    nsRefPtr<nsWindow> window = get_window_for_gdk_window(event->window);
    if (!window)
        return TRUE;

    window->OnEnterNotifyEvent(widget, event);

    return TRUE;
}

/* static */
gboolean
leave_notify_event_cb(GtkWidget *widget,
                      GdkEventCrossing *event)
{
    if (is_parent_grab_leave(event)) {
        return TRUE;
    }

    nsRefPtr<nsWindow> window = get_window_for_gdk_window(event->window);
    if (!window)
        return TRUE;

    window->OnLeaveNotifyEvent(widget, event);

    return TRUE;
}

/* static */
gboolean
motion_notify_event_cb(GtkWidget *widget, GdkEventMotion *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gdk_window(event->window);
    if (!window)
        return TRUE;

    window->OnMotionNotifyEvent(widget, event);

    return TRUE;
}

/* static */
gboolean
button_press_event_cb(GtkWidget *widget, GdkEventButton *event)
{
    LOG(("button_press_event_cb\n"));
    nsWindow *window = get_window_for_gdk_window(event->window);
    if (!window)
        return TRUE;

    window->OnButtonPressEvent(widget, event);

    return TRUE;
}

/* static */
gboolean
button_release_event_cb(GtkWidget *widget, GdkEventButton *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gdk_window(event->window);
    if (!window)
        return TRUE;

    window->OnButtonReleaseEvent(widget, event);

    return TRUE;
}

/* static */
gboolean
focus_in_event_cb(GtkWidget *widget, GdkEventFocus *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(widget);
    if (!window)
        return FALSE;

    window->OnContainerFocusInEvent(widget, event);

    return FALSE;
}

/* static */
gboolean
focus_out_event_cb(GtkWidget *widget, GdkEventFocus *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(widget);
    if (!window)
        return FALSE;

    window->OnContainerFocusOutEvent(widget, event);

    return FALSE;
}

/* static */
GdkFilterReturn
plugin_window_filter_func(GdkXEvent *gdk_xevent, GdkEvent *event, gpointer data)
{
    GtkWidget *widget;
    GdkWindow *plugin_window;
    gpointer  user_data;
    XEvent    *xevent;

    nsRefPtr<nsWindow> nswindow = (nsWindow*)data;
    GdkFilterReturn return_val;

    xevent = (XEvent *)gdk_xevent;
    return_val = GDK_FILTER_CONTINUE;

    switch (xevent->type)
    {
        case CreateNotify:
        case ReparentNotify:
            if (xevent->type==CreateNotify) {
                plugin_window = gdk_window_lookup(xevent->xcreatewindow.window);
            }
            else {
                if (xevent->xreparent.event != xevent->xreparent.parent)
                    break;
                plugin_window = gdk_window_lookup (xevent->xreparent.window);
            }
            if (plugin_window) {
                user_data = nsnull;
                gdk_window_get_user_data(plugin_window, &user_data);
                widget = GTK_WIDGET(user_data);

                if (GTK_IS_XTBIN(widget)) {
                    nswindow->SetPluginType(nsWindow::PluginType_NONXEMBED);
                    break;
                }
                else if(GTK_IS_SOCKET(widget)) {
                    nswindow->SetPluginType(nsWindow::PluginType_XEMBED);
                    break;
                }
            }
            nswindow->SetPluginType(nsWindow::PluginType_NONXEMBED);
            return_val = GDK_FILTER_REMOVE;
            break;
        case EnterNotify:
            nswindow->SetNonXEmbedPluginFocus();
            break;
        case DestroyNotify:
            gdk_window_remove_filter
                ((GdkWindow*)(nswindow->GetNativeData(NS_NATIVE_WINDOW)),
                 plugin_window_filter_func,
                 nswindow);
            // Currently we consider all plugins are non-xembed and calls
            // LoseNonXEmbedPluginFocus without any checking.
            nswindow->LoseNonXEmbedPluginFocus();
            break;
        default:
            break;
    }
    return return_val;
}

/* static */
GdkFilterReturn
plugin_client_message_filter(GdkXEvent *gdk_xevent,
                             GdkEvent *event,
                             gpointer data)
{
    XEvent    *xevent;
    xevent = (XEvent *)gdk_xevent;

    GdkFilterReturn return_val;
    return_val = GDK_FILTER_CONTINUE;

    if (!gPluginFocusWindow || xevent->type!=ClientMessage) {
        return return_val;
    }

    // When WM sends out WM_TAKE_FOCUS, gtk2 will use XSetInputFocus
    // to set the focus to the focus proxy. To prevent this happen
    // while the focus is on the plugin, we filter the WM_TAKE_FOCUS
    // out.
    Display *dpy ;
    dpy = GDK_WINDOW_XDISPLAY((GdkWindow*)(gPluginFocusWindow->
                GetNativeData(NS_NATIVE_WINDOW)));
    if (gdk_x11_get_xatom_by_name("WM_PROTOCOLS")
            != xevent->xclient.message_type) {
        return return_val;
    }

    if ((Atom) xevent->xclient.data.l[0] ==
            gdk_x11_get_xatom_by_name("WM_TAKE_FOCUS")) {
        // block it from gtk2.0 focus proxy
        return_val = GDK_FILTER_REMOVE;
    }

    return return_val;
}

/* static */
gboolean
key_press_event_cb(GtkWidget *widget, GdkEventKey *event)
{
    LOG(("key_press_event_cb\n"));
    // find the window with focus and dispatch this event to that widget
    nsWindow *window = get_window_for_gtk_widget(widget);
    if (!window)
        return FALSE;

    nsRefPtr<nsWindow> focusWindow = gFocusWindow ? gFocusWindow : window;

    return focusWindow->OnKeyPressEvent(widget, event);
}

gboolean
key_release_event_cb(GtkWidget *widget, GdkEventKey *event)
{
    LOG(("key_release_event_cb\n"));
    // find the window with focus and dispatch this event to that widget
    nsWindow *window = get_window_for_gtk_widget(widget);
    if (!window)
        return FALSE;

    nsRefPtr<nsWindow> focusWindow = gFocusWindow ? gFocusWindow : window;

    return focusWindow->OnKeyReleaseEvent(widget, event);
}

/* static */
gboolean
scroll_event_cb(GtkWidget *widget, GdkEventScroll *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gdk_window(event->window);
    if (!window)
        return FALSE;

    window->OnScrollEvent(widget, event);

    return TRUE;
}

/* static */
gboolean
visibility_notify_event_cb (GtkWidget *widget, GdkEventVisibility *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gdk_window(event->window);
    if (!window)
        return FALSE;

    window->OnVisibilityNotifyEvent(widget, event);

    return TRUE;
}

/* static */
gboolean
window_state_event_cb (GtkWidget *widget, GdkEventWindowState *event)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(widget);
    if (!window)
        return FALSE;

    window->OnWindowStateEvent(widget, event);

    return FALSE;
}

/* static */
void
theme_changed_cb (GtkSettings *settings, GParamSpec *pspec, nsWindow *data)
{
    nsRefPtr<nsWindow> window = data;
    window->ThemeChanged();
}

//////////////////////////////////////////////////////////////////////
// These are all of our drag and drop operations

void
nsWindow::InitDragEvent(nsMouseEvent &aEvent)
{
    // set the keyboard modifiers
    gint x, y;
    GdkModifierType state = (GdkModifierType)0;
    gdk_window_get_pointer(NULL, &x, &y, &state);
    aEvent.isShift = (state & GDK_SHIFT_MASK) ? PR_TRUE : PR_FALSE;
    aEvent.isControl = (state & GDK_CONTROL_MASK) ? PR_TRUE : PR_FALSE;
    aEvent.isAlt = (state & GDK_MOD1_MASK) ? PR_TRUE : PR_FALSE;
    aEvent.isMeta = PR_FALSE; // GTK+ doesn't support the meta key
}

// This will update the drag action based on the information in the
// drag context.  Gtk gets this from a combination of the key settings
// and what the source is offering.

void
nsWindow::UpdateDragStatus(nsMouseEvent   &aEvent,
                           GdkDragContext *aDragContext,
                           nsIDragService *aDragService)
{
    // default is to do nothing
    int action = nsIDragService::DRAGDROP_ACTION_NONE;

    // set the default just in case nothing matches below
    if (aDragContext->actions & GDK_ACTION_DEFAULT)
        action = nsIDragService::DRAGDROP_ACTION_MOVE;

    // first check to see if move is set
    if (aDragContext->actions & GDK_ACTION_MOVE)
        action = nsIDragService::DRAGDROP_ACTION_MOVE;

    // then fall to the others
    else if (aDragContext->actions & GDK_ACTION_LINK)
        action = nsIDragService::DRAGDROP_ACTION_LINK;

    // copy is ctrl
    else if (aDragContext->actions & GDK_ACTION_COPY)
        action = nsIDragService::DRAGDROP_ACTION_COPY;

    // update the drag information
    nsCOMPtr<nsIDragSession> session;
    aDragService->GetCurrentSession(getter_AddRefs(session));

    if (session)
        session->SetDragAction(action);
}


/* static */
gboolean
drag_motion_event_cb(GtkWidget *aWidget,
                     GdkDragContext *aDragContext,
                     gint aX,
                     gint aY,
                     guint aTime,
                     gpointer aData)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(aWidget);
    if (!window)
        return FALSE;

    return window->OnDragMotionEvent(aWidget,
                                     aDragContext,
                                     aX, aY, aTime, aData);
}
/* static */
void
drag_leave_event_cb(GtkWidget *aWidget,
                    GdkDragContext *aDragContext,
                    guint aTime,
                    gpointer aData)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(aWidget);
    if (!window)
        return;

    window->OnDragLeaveEvent(aWidget, aDragContext, aTime, aData);
}


/* static */
gboolean
drag_drop_event_cb(GtkWidget *aWidget,
                   GdkDragContext *aDragContext,
                   gint aX,
                   gint aY,
                   guint aTime,
                   gpointer *aData)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(aWidget);
    if (!window)
        return FALSE;

    return window->OnDragDropEvent(aWidget,
                                   aDragContext,
                                   aX, aY, aTime, aData);
}

/* static */
void
drag_data_received_event_cb(GtkWidget *aWidget,
                            GdkDragContext *aDragContext,
                            gint aX,
                            gint aY,
                            GtkSelectionData  *aSelectionData,
                            guint aInfo,
                            guint aTime,
                            gpointer aData)
{
    nsRefPtr<nsWindow> window = get_window_for_gtk_widget(aWidget);
    if (!window)
        return;

    window->OnDragDataReceivedEvent(aWidget,
                                    aDragContext,
                                    aX, aY,
                                    aSelectionData,
                                    aInfo, aTime, aData);
}

/* static */
nsresult
initialize_prefs(void)
{
    // check to see if we should set our raise pref
    nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
    if (!prefs)
        return NS_OK;

    PRBool val = PR_TRUE;
    nsresult rv;
    rv = prefs->GetBoolPref("mozilla.widget.raise-on-setfocus", &val);
    if (NS_SUCCEEDED(rv))
        gRaiseWindows = val;

    return NS_OK;
}

void
nsWindow::ResetDragMotionTimer(GtkWidget *aWidget,
                               GdkDragContext *aDragContext,
                               gint aX, gint aY, guint aTime)
{

    // We have to be careful about ref ordering here.  if aWidget ==
    // mDraMotionWidget be careful not to let the refcnt drop to zero.
    // Same with the drag context.
    if (aWidget)
        gtk_widget_ref(aWidget);
    if (mDragMotionWidget)
        gtk_widget_unref(mDragMotionWidget);
    mDragMotionWidget = aWidget;

    if (aDragContext)
        gdk_drag_context_ref(aDragContext);
    if (mDragMotionContext)
        gdk_drag_context_unref(mDragMotionContext);
    mDragMotionContext = aDragContext;

    mDragMotionX = aX;
    mDragMotionY = aY;
    mDragMotionTime = aTime;

    // always clear the timer
    if (mDragMotionTimerID) {
        gtk_timeout_remove(mDragMotionTimerID);
        mDragMotionTimerID = 0;
        LOG(("*** canceled motion timer\n"));
    }

    // if no widget was passed in, just return instead of setting a new
    // timer
    if (!aWidget) {
        return;
    }

    // otherwise we create a new timer
    mDragMotionTimerID = gtk_timeout_add(100,
                                         (GtkFunction)DragMotionTimerCallback,
                                         this);
}

void
nsWindow::FireDragMotionTimer(void)
{
    LOG(("nsWindow::FireDragMotionTimer(%p)\n", this));

    OnDragMotionEvent(mDragMotionWidget, mDragMotionContext,
                      mDragMotionX, mDragMotionY, mDragMotionTime,
                      this);
}

void
nsWindow::FireDragLeaveTimer(void)
{
    LOG(("nsWindow::FireDragLeaveTimer(%p)\n", this));

    mDragLeaveTimer = 0;

    // clean up any pending drag motion window info
    if (mLastDragMotionWindow) {
        nsRefPtr<nsWindow> kungFuDeathGrip = mLastDragMotionWindow;
        // send our leave signal
        mLastDragMotionWindow->OnDragLeave();
        mLastDragMotionWindow = 0;
    }
}

/* static */
guint
nsWindow::DragMotionTimerCallback(gpointer aClosure)
{
    nsRefPtr<nsWindow> window = static_cast<nsWindow *>(aClosure);
    window->FireDragMotionTimer();
    return FALSE;
}

/* static */
void
nsWindow::DragLeaveTimerCallback(nsITimer *aTimer, void *aClosure)
{
    nsRefPtr<nsWindow> window = static_cast<nsWindow *>(aClosure);
    window->FireDragLeaveTimer();
}

/* static */
GdkWindow *
get_inner_gdk_window (GdkWindow *aWindow,
                      gint x, gint y,
                      gint *retx, gint *rety)
{
    gint cx, cy, cw, ch, cd;
    GList * children = gdk_window_peek_children(aWindow);
    guint num = g_list_length(children);
    for (int i = 0; i < (int)num; i++) {
        GList * child = g_list_nth(children, num - i - 1) ;
        if (child) {
            GdkWindow * childWindow = (GdkWindow *) child->data;
            gdk_window_get_geometry (childWindow, &cx, &cy, &cw, &ch, &cd);
            if ((cx < x) && (x < (cx + cw)) &&
                (cy < y) && (y < (cy + ch)) &&
                gdk_window_is_visible (childWindow)) {
                return get_inner_gdk_window (childWindow,
                                             x - cx, y - cy,
                                             retx, rety);
            }
        }
    }
    *retx = x;
    *rety = y;
    return aWindow;
}

inline PRBool
is_context_menu_key(const nsKeyEvent& aKeyEvent)
{
    return ((aKeyEvent.keyCode == NS_VK_F10 && aKeyEvent.isShift &&
             !aKeyEvent.isControl && !aKeyEvent.isMeta && !aKeyEvent.isAlt) ||
            (aKeyEvent.keyCode == NS_VK_CONTEXT_MENU && !aKeyEvent.isShift &&
             !aKeyEvent.isControl && !aKeyEvent.isMeta && !aKeyEvent.isAlt));
}

void
key_event_to_context_menu_event(const nsKeyEvent* aKeyEvent,
                                nsMouseEvent* aCMEvent)
{
    memcpy(aCMEvent, aKeyEvent, sizeof(nsInputEvent));
    aCMEvent->eventStructType = NS_MOUSE_EVENT;
    aCMEvent->message = NS_CONTEXTMENU;
    aCMEvent->context = nsMouseEvent::eContextMenuKey;
    aCMEvent->button = nsMouseEvent::eLeftButton;
    aCMEvent->isShift = aCMEvent->isControl = PR_FALSE;
    aCMEvent->isAlt = aCMEvent->isMeta = PR_FALSE;
    aCMEvent->clickCount = 0;
    aCMEvent->acceptActivation = PR_FALSE;
}

/* static */
int
is_parent_ungrab_enter(GdkEventCrossing *aEvent)
{
    return (GDK_CROSSING_UNGRAB == aEvent->mode) &&
        ((GDK_NOTIFY_ANCESTOR == aEvent->detail) ||
         (GDK_NOTIFY_VIRTUAL == aEvent->detail));

}

/* static */
int
is_parent_grab_leave(GdkEventCrossing *aEvent)
{
    return (GDK_CROSSING_GRAB == aEvent->mode) &&
        ((GDK_NOTIFY_ANCESTOR == aEvent->detail) ||
            (GDK_NOTIFY_VIRTUAL == aEvent->detail));
}

static GdkModifierType
gdk_keyboard_get_modifiers()
{
    GdkModifierType m = (GdkModifierType) 0;

    gdk_window_get_pointer(NULL, NULL, NULL, &m);

    return m;
}

// Get the modifier masks for GDK_Caps_Lock, GDK_Num_Lock and GDK_Scroll_Lock.
// Return PR_TRUE on success, PR_FALSE on error.
static PRBool
gdk_keyboard_get_modmap_masks(Display*  aDisplay,
                              PRUint32* aCapsLockMask,
                              PRUint32* aNumLockMask,
                              PRUint32* aScrollLockMask)
{
    *aCapsLockMask = 0;
    *aNumLockMask = 0;
    *aScrollLockMask = 0;

    int min_keycode = 0;
    int max_keycode = 0;
    XDisplayKeycodes(aDisplay, &min_keycode, &max_keycode);

    int keysyms_per_keycode = 0;
    KeySym* xkeymap = XGetKeyboardMapping(aDisplay, min_keycode,
                                          max_keycode - min_keycode + 1,
                                          &keysyms_per_keycode);
    if (!xkeymap) {
        return PR_FALSE;
    }

    XModifierKeymap* xmodmap = XGetModifierMapping(aDisplay);
    if (!xmodmap) {
        XFree(xkeymap);
        return PR_FALSE;
    }

    /*
      The modifiermap member of the XModifierKeymap structure contains 8 sets
      of max_keypermod KeyCodes, one for each modifier in the order Shift,
      Lock, Control, Mod1, Mod2, Mod3, Mod4, and Mod5.
      Only nonzero KeyCodes have meaning in each set, and zero KeyCodes are ignored.
    */
    const unsigned int map_size = 8 * xmodmap->max_keypermod;
    for (unsigned int i = 0; i < map_size; i++) {
        KeyCode keycode = xmodmap->modifiermap[i];
        if (!keycode || keycode < min_keycode || keycode > max_keycode)
            continue;

        const KeySym* syms = xkeymap + (keycode - min_keycode) * keysyms_per_keycode;
        const unsigned int mask = 1 << (i / xmodmap->max_keypermod);
        for (int j = 0; j < keysyms_per_keycode; j++) {
            switch (syms[j]) {
                case GDK_Caps_Lock:   *aCapsLockMask |= mask;   break;
                case GDK_Num_Lock:    *aNumLockMask |= mask;    break;
                case GDK_Scroll_Lock: *aScrollLockMask |= mask; break;
            }
        }
    }

    XFreeModifiermap(xmodmap);
    XFree(xkeymap);
    return PR_TRUE;
}

#ifdef ACCESSIBILITY
/**
 * void
 * nsWindow::CreateRootAccessible
 *
 * request to create the nsIAccessible Object for the toplevel window
 **/
void
nsWindow::CreateRootAccessible()
{
    if (mIsTopLevel && !mRootAccessible) {
        nsCOMPtr<nsIAccessible> acc;
        DispatchAccessibleEvent(getter_AddRefs(acc));

        if (acc) {
            mRootAccessible = acc;
        }
    }
}

void
nsWindow::GetRootAccessible(nsIAccessible** aAccessible)
{
    nsCOMPtr<nsIAccessible> accessible, parentAccessible;
    DispatchAccessibleEvent(getter_AddRefs(accessible));
    PRUint32 role;

    if (!accessible) {
        return;
    }
    while (PR_TRUE) {
        accessible->GetParent(getter_AddRefs(parentAccessible));
        if (!parentAccessible) {
            break;
        }
        parentAccessible->GetRole(&role);
        if (role == nsIAccessibleRole::ROLE_APP_ROOT) {
            NS_ADDREF(*aAccessible = accessible);
            break;
        }
        accessible = parentAccessible;
    }
}

/**
 * void
 * nsWindow::DispatchAccessibleEvent
 * @aAccessible: the out var, hold the new accessible object
 *
 * generate the NS_GETACCESSIBLE event, the event handler is
 * reponsible to create an nsIAccessible instant.
 **/
PRBool
nsWindow::DispatchAccessibleEvent(nsIAccessible** aAccessible)
{
    PRBool result = PR_FALSE;
    nsAccessibleEvent event(PR_TRUE, NS_GETACCESSIBLE, this);

    *aAccessible = nsnull;

    nsEventStatus status;
    DispatchEvent(&event, status);
    result = (nsEventStatus_eConsumeNoDefault == status) ? PR_TRUE : PR_FALSE;

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

    return result;
}

void
nsWindow::DispatchActivateEvent(void)
{
    if (sAccessibilityEnabled) {
        nsCOMPtr<nsIAccessible> rootAcc;
        GetRootAccessible(getter_AddRefs(rootAcc));
        nsCOMPtr<nsPIAccessible> privAcc(do_QueryInterface(rootAcc));
        if (privAcc) {
            privAcc->FireToolkitEvent(
                         nsIAccessibleEvent::EVENT_WINDOW_ACTIVATE,
                         rootAcc, nsnull);
        }
    }

    nsCommonWidget::DispatchActivateEvent();
}

void
nsWindow::DispatchDeactivateEvent(void)
{
    nsCommonWidget::DispatchDeactivateEvent();

    if (sAccessibilityEnabled) {
        nsCOMPtr<nsIAccessible> rootAcc;
        GetRootAccessible(getter_AddRefs(rootAcc));
        nsCOMPtr<nsPIAccessible> privAcc(do_QueryInterface(rootAcc));
        if (privAcc) {
            privAcc->FireToolkitEvent(
                         nsIAccessibleEvent::EVENT_WINDOW_DEACTIVATE,
                         rootAcc, nsnull);
        }
    }
}
#endif /* #ifdef ACCESSIBILITY */

// nsChildWindow class

nsChildWindow::nsChildWindow()
{
}

nsChildWindow::~nsChildWindow()
{
}

#ifdef USE_XIM

void
nsWindow::IMEInitData(void)
{
    if (mIMEData)
        return;
    nsWindow *win = IMEGetOwningWindow();
    if (!win)
        return;
    mIMEData = win->mIMEData;
    if (!mIMEData)
        return;
    mIMEData->mRefCount++;
}

void
nsWindow::IMEReleaseData(void)
{
    if (!mIMEData)
        return;

    mIMEData->mRefCount--;
    if (mIMEData->mRefCount != 0)
        return;

    delete mIMEData;
    mIMEData = nsnull;
}

void
nsWindow::IMEDestroyContext(void)
{
    if (!mIMEData || mIMEData->mOwner != this) {
        // This nsWindow is not the owner of the instance of mIMEData.
        if (IMEComposingWindow() == this)
            CancelIMEComposition();
        if (gIMEFocusWindow == this)
            gIMEFocusWindow = nsnull;
        IMEReleaseData();
        return;
    }

    /* NOTE:
     * This nsWindow is the owner of the instance of mIMEData,
     * so, we must release the contexts now. But that might be referred from
     * other nsWindows.(They are children of this. But we don't know why there
     * are the cases.) So, we need to clear the pointers that refers to contexts
     * and this if the other referrers are still alive. See bug 349727.
     */

    // If this is the focus window and we have an IM context we need
    // to unset the focus on this window before we destroy the window.
    GtkIMContext *im = IMEGetContext();
    if (im && gIMEFocusWindow && gIMEFocusWindow->IMEGetContext() == im) {
        gIMEFocusWindow->IMELoseFocus();
        gIMEFocusWindow = nsnull;
    }

    mIMEData->mOwner   = nsnull;
    mIMEData->mEnabled = nsIKBStateControl::IME_STATUS_DISABLED;

    if (mIMEData->mContext) {
        gtk_im_context_set_client_window(mIMEData->mContext, nsnull);
        g_object_unref(G_OBJECT(mIMEData->mContext));
        mIMEData->mContext = nsnull;
    }

    if (mIMEData->mDummyContext) {
        gtk_im_context_set_client_window(mIMEData->mDummyContext, nsnull);
        g_object_unref(G_OBJECT(mIMEData->mDummyContext));
        mIMEData->mDummyContext = nsnull;
    }

    IMEReleaseData();
}

void
nsWindow::IMESetFocus(void)
{
    IMEInitData();

    LOGIM(("IMESetFocus %p\n", (void *)this));
    GtkIMContext *im = IMEGetContext();
    if (!im)
        return;

    gtk_im_context_focus_in(im);
    gIMEFocusWindow = this;

    if (!IMEIsEnabled()) {
        // We should release IME focus for uim and scim.
        // These IMs are using snooper that is released at losing focus.
        IMELoseFocus();
    }
}

void
nsWindow::IMELoseFocus(void)
{
    LOGIM(("IMELoseFocus %p\n", (void *)this));
    GtkIMContext *im = IMEGetContext();
    if (!im)
        return;

    gtk_im_context_focus_out(im);
}

void
nsWindow::IMEComposeStart(void)
{
    LOGIM(("IMEComposeStart [%p]\n", (void *)this));

    if (!mIMEData) {
        NS_ERROR("This widget doesn't support IM");
        return;
    }

    if (IMEComposingWindow()) {
        NS_WARNING("tried to re-start text composition\n");
        return;
    }

    mIMEData->mComposingWindow = this;

    nsCompositionEvent compEvent(PR_TRUE, NS_COMPOSITION_START, this);

    nsEventStatus status;
    DispatchEvent(&compEvent, status);

    if (NS_UNLIKELY(mIsDestroyed))
        return;

    gint x1, y1, x2, y2;
    GtkWidget *widget =
        get_gtk_widget_for_gdk_window(this->mDrawingarea->inner_window);

    gdk_window_get_origin(widget->window, &x1, &y1);
    gdk_window_get_origin(this->mDrawingarea->inner_window, &x2, &y2);

    GdkRectangle area;
    area.x = compEvent.theReply.mCursorPosition.x + (x2 - x1);
    area.y = compEvent.theReply.mCursorPosition.y + (y2 - y1);
    area.width  = 0;
    area.height = compEvent.theReply.mCursorPosition.height;

    gtk_im_context_set_cursor_location(IMEGetContext(), &area);
}

void
nsWindow::IMEComposeText(const PRUnichar *aText,
                         const PRInt32 aLen,
                         const gchar *aPreeditString,
                         const gint aCursorPos,
                         const PangoAttrList *aFeedback)
{
    if (!mIMEData) {
        NS_ERROR("This widget doesn't support IM");
        return;
    }

    // Send our start composition event if we need to
    if (!IMEComposingWindow()) {
        IMEComposeStart();
        if (NS_UNLIKELY(mIsDestroyed))
            return;
    }


    LOGIM(("IMEComposeText\n"));
    nsTextEvent textEvent(PR_TRUE, NS_TEXT_TEXT, this);

    if (aLen != 0) {
        textEvent.theText = (PRUnichar*)aText;

        if (aPreeditString && aFeedback && (aLen > 0)) {
            IM_set_text_range(aLen, aPreeditString, aCursorPos, aFeedback,
                              &(textEvent.rangeCount),
                              &(textEvent.rangeArray));
        }
    }

    nsEventStatus status;
    DispatchEvent(&textEvent, status);

    if (textEvent.rangeArray) {
        delete[] textEvent.rangeArray;
    }

    if (NS_UNLIKELY(mIsDestroyed))
        return;

    gint x1, y1, x2, y2;
    GtkWidget *widget =
        get_gtk_widget_for_gdk_window(this->mDrawingarea->inner_window);

    gdk_window_get_origin(widget->window, &x1, &y1);
    gdk_window_get_origin(this->mDrawingarea->inner_window, &x2, &y2);

    GdkRectangle area;
    area.x = textEvent.theReply.mCursorPosition.x + (x2 - x1);
    area.y = textEvent.theReply.mCursorPosition.y + (y2 - y1);
    area.width  = 0;
    area.height = textEvent.theReply.mCursorPosition.height;

    gtk_im_context_set_cursor_location(IMEGetContext(), &area);
}

void
nsWindow::IMEComposeEnd(void)
{
    LOGIM(("IMEComposeEnd [%p]\n", (void *)this));
    NS_ASSERTION(mIMEData, "This widget doesn't support IM");

    if (!IMEComposingWindow()) {
        NS_WARNING("tried to end text composition before it was started");
        return;
    }

    mIMEData->mComposingWindow = nsnull;

    nsCompositionEvent compEvent(PR_TRUE, NS_COMPOSITION_END, this);

    nsEventStatus status;
    DispatchEvent(&compEvent, status);
}

GtkIMContext*
nsWindow::IMEGetContext()
{
    return IM_get_input_context(this);
}

static PRBool
IsIMEEnabledState(PRUint32 aState)
{
    return aState == nsIKBStateControl::IME_STATUS_ENABLED ? PR_TRUE : PR_FALSE;
}

PRBool
nsWindow::IMEIsEnabled(void)
{
    return mIMEData ? IsIMEEnabledState(mIMEData->mEnabled) : PR_FALSE;
}

nsWindow*
nsWindow::IMEComposingWindow(void)
{
    return mIMEData ? mIMEData->mComposingWindow : nsnull;
}

nsWindow*
nsWindow::IMEGetOwningWindow(void)
{
    nsWindow *window = IM_get_owning_window(this->mDrawingarea);
    return window;
}

void
nsWindow::IMECreateContext(void)
{
    mIMEData = new nsIMEData(this);
    if (!mIMEData)
        return;

    mIMEData->mContext = gtk_im_multicontext_new();
    mIMEData->mDummyContext = gtk_im_multicontext_new();
    if (!mIMEData->mContext || !mIMEData->mDummyContext) {
        NS_ERROR("failed to create IM context.");
        IMEDestroyContext();
        return;
    }

    gtk_im_context_set_client_window(mIMEData->mContext,
                                     GTK_WIDGET(mContainer)->window);
    gtk_im_context_set_client_window(mIMEData->mDummyContext,
                                     GTK_WIDGET(mContainer)->window);

    g_signal_connect(G_OBJECT(mIMEData->mContext), "preedit_changed",
                     G_CALLBACK(IM_preedit_changed_cb), this);
    g_signal_connect(G_OBJECT(mIMEData->mContext), "commit",
                     G_CALLBACK(IM_commit_cb), this);
}

PRBool
nsWindow::IMEFilterEvent(GdkEventKey *aEvent)
{
    if (!IMEIsEnabled())
        return FALSE;

    GtkIMContext *im = IMEGetContext();
    if (!im)
        return FALSE;

    gKeyEvent = aEvent;
    gboolean filtered = gtk_im_context_filter_keypress(im, aEvent);
    gKeyEvent = NULL;

    LOGIM(("key filtered: %d committed: %d changed: %d\n",
           filtered, gKeyEventCommitted, gKeyEventChanged));

    // We filter the key event if the event was not committed (because
    // it's probably part of a composition) or if the key event was
    // committed _and_ changed.  This way we still let key press
    // events go through as simple key press events instead of
    // composed characters.

    PRBool retval = PR_FALSE;
    if (filtered &&
        (!gKeyEventCommitted || (gKeyEventCommitted && gKeyEventChanged)))
        retval = PR_TRUE;

    gKeyEventChanged = PR_FALSE;
    gKeyEventCommitted = PR_FALSE;
    gKeyEventChanged = PR_FALSE;

    return retval;
}

/* nsIKBStateControl */
NS_IMETHODIMP
nsWindow::ResetInputState()
{
    IMEInitData();

    nsRefPtr<nsWindow> win = IMEComposingWindow();
    if (win) {
        GtkIMContext *im = IMEGetContext();
        if (!im)
            return NS_OK;

        gchar *preedit_string;
        gint cursor_pos;
        PangoAttrList *feedback_list;
        gtk_im_context_get_preedit_string(im, &preedit_string,
                                          &feedback_list, &cursor_pos);
        if (preedit_string && *preedit_string) {
            IM_commit_cb_internal(preedit_string, win);
            g_free(preedit_string);
        }
        if (feedback_list)
            pango_attr_list_unref(feedback_list);
    }

    CancelIMEComposition();

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::SetIMEOpenState(PRBool aState)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::GetIMEOpenState(PRBool* aState)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsWindow::SetIMEEnabled(PRUint32 aState)
{
    IMEInitData();
    if (!mIMEData)
        return NS_OK;

    PRBool newState = IsIMEEnabledState(aState);
    PRBool oldState = IsIMEEnabledState(mIMEData->mEnabled);
    if (newState == oldState) {
        mIMEData->mEnabled = aState;
        return NS_OK;
    }

    GtkIMContext *focusedIm = nsnull;
    // XXX Don't we need to check gFocusWindow?
    nsRefPtr<nsWindow> focusedWin = gIMEFocusWindow;
    if (focusedWin && focusedWin->mIMEData)
        focusedIm = focusedWin->mIMEData->mContext;

    if (focusedIm && focusedIm == mIMEData->mContext) {
        // Release current IME focus if IME is enabled.
        if (oldState) {
            focusedWin->ResetInputState();
            focusedWin->IMELoseFocus();
        }

        mIMEData->mEnabled = aState;

        // Even when aState is not PR_TRUE, we need to set IME focus.
        // Because some IMs are updating the status bar of them in this time.
        focusedWin->IMESetFocus();
    } else {
        if (oldState)
            ResetInputState();
        mIMEData->mEnabled = aState;
    }

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::GetIMEEnabled(PRUint32* aState)
{
    NS_ENSURE_ARG_POINTER(aState);

    IMEInitData();

    *aState =
      mIMEData ? mIMEData->mEnabled : nsIKBStateControl::IME_STATUS_DISABLED;
    return NS_OK;
}

NS_IMETHODIMP
nsWindow::CancelIMEComposition()
{
    IMEInitData();

    GtkIMContext *im = IMEGetContext();
    if (!im)
        return NS_OK;

    NS_ASSERTION(!gIMESuppressCommit,
                 "CancelIMEComposition is already called!");
    gIMESuppressCommit = PR_TRUE;
    gtk_im_context_reset(im);
    gIMESuppressCommit = PR_FALSE;

    nsRefPtr<nsWindow> win = IMEComposingWindow();
    if (win) {
        win->IMEComposeText(nsnull, 0, nsnull, 0, nsnull);
        win->IMEComposeEnd();
    }

    return NS_OK;
}

NS_IMETHODIMP
nsWindow::GetToggledKeyState(PRUint32 aKeyCode, PRBool* aLEDState)
{
    NS_ENSURE_ARG_POINTER(aLEDState);

    GdkModifierType modifiers = gdk_keyboard_get_modifiers();
    PRUint32 capsLockMask, numLockMask, scrollLockMask;
    PRBool foundMasks = gdk_keyboard_get_modmap_masks(
                          GDK_WINDOW_XDISPLAY(mDrawingarea->inner_window),
                          &capsLockMask, &numLockMask, &scrollLockMask);

    PRUint32 mask = 0;
    switch (aKeyCode) {
        case NS_VK_CAPS_LOCK:   mask = capsLockMask;   break;
        case NS_VK_NUM_LOCK:    mask = numLockMask;    break;
        case NS_VK_SCROLL_LOCK: mask = scrollLockMask; break;
    }
    if (mask == 0)
        return NS_ERROR_NOT_IMPLEMENTED;

    *aLEDState = (modifiers & mask) != 0;
    return NS_OK;
}

/* static */
void
IM_preedit_changed_cb(GtkIMContext *aContext,
                      nsWindow     *aWindow)
{
    gchar *preedit_string;
    gint cursor_pos;
    PangoAttrList *feedback_list;

    // if gFocusWindow is null, use the last focused gIMEFocusWindow
    nsRefPtr<nsWindow> window = gFocusWindow ? gFocusWindow : gIMEFocusWindow;
    if (!window)
        return;

    // Should use cursor_pos ?
    // Of course!!!
    gtk_im_context_get_preedit_string(aContext, &preedit_string,
                                      &feedback_list, &cursor_pos);

    LOGIM(("preedit string is: %s   length is: %d\n",
           preedit_string, strlen(preedit_string)));

    if (!preedit_string || !*preedit_string) {
        LOGIM(("preedit ended\n"));
        window->IMEComposeText(NULL, 0, NULL, 0, NULL);
        window->IMEComposeEnd();
        return;
    }

    LOGIM(("preedit len %d\n", strlen(preedit_string)));

    gunichar2 * uniStr;
    glong uniStrLen;

    uniStr = NULL;
    uniStrLen = 0;
    uniStr = g_utf8_to_utf16(preedit_string, -1, NULL, &uniStrLen, NULL);

    if (!uniStr) {
        g_free(preedit_string);
        LOG(("utf8-utf16 string tranfer failed!\n"));
        if (feedback_list)
            pango_attr_list_unref(feedback_list);
        return;
    }

    if (uniStrLen) {
        window->IMEComposeText(static_cast<const PRUnichar *>(uniStr),
                               uniStrLen, preedit_string, cursor_pos, feedback_list);
    }

    g_free(preedit_string);
    g_free(uniStr);

    if (feedback_list)
        pango_attr_list_unref(feedback_list);
}

/* static */
void
IM_commit_cb(GtkIMContext *aContext,
             const gchar  *aUtf8_str,
             nsWindow     *aWindow)
{
    if (gIMESuppressCommit)
        return;

    LOGIM(("IM_commit_cb\n"));

    gKeyEventCommitted = PR_TRUE;

    // if gFocusWindow is null, use the last focused gIMEFocusWindow
    nsRefPtr<nsWindow> window = gFocusWindow ? gFocusWindow : gIMEFocusWindow;

    if (!window)
        return;

    /* If IME doesn't change they keyevent that generated this commit,
       don't send it through XIM - just send it as a normal key press
       event. */

    if (gKeyEvent) {
        char keyval_utf8[8]; /* should have at least 6 bytes of space */
        gint keyval_utf8_len;
        guint32 keyval_unicode;

        keyval_unicode = gdk_keyval_to_unicode(gKeyEvent->keyval);
        keyval_utf8_len = g_unichar_to_utf8(keyval_unicode, keyval_utf8);
        keyval_utf8[keyval_utf8_len] = '\0';

        if (!strcmp(aUtf8_str, keyval_utf8)) {
            gKeyEventChanged = PR_FALSE;
            return;
        }
    }

    gKeyEventChanged = PR_TRUE;
    IM_commit_cb_internal(aUtf8_str, window);
}

/* static */
void
IM_commit_cb_internal(const gchar  *aUtf8_str,
                      nsWindow     *aWindow)
{
    gunichar2 *uniStr = nsnull;
    glong uniStrLen = 0;
    uniStr = g_utf8_to_utf16(aUtf8_str, -1, NULL, &uniStrLen, NULL);

    if (!uniStr) {
        LOGIM(("utf80utf16 string tranfer failed!\n"));
        return;
    }

    if (uniStrLen) {
        aWindow->IMEComposeText((const PRUnichar *)uniStr,
                                (PRInt32)uniStrLen, nsnull, 0, nsnull);
        aWindow->IMEComposeEnd();
    }

    g_free(uniStr);
}

#define	START_OFFSET(I)	\
    (*aTextRangeListResult)[I].mStartOffset

#define	END_OFFSET(I) \
    (*aTextRangeListResult)[I].mEndOffset

#define	SET_FEEDBACKTYPE(I,T) (*aTextRangeListResult)[I].mRangeType = T

/* static */
void
IM_set_text_range(const PRInt32 aLen,
                  const gchar *aPreeditString,
                  const gint aCursorPos,
                  const PangoAttrList *aFeedback,
                  PRUint32 *aTextRangeListLengthResult,
                  nsTextRangeArray *aTextRangeListResult)
{
    if (aLen == 0) {
        aTextRangeListLengthResult = 0;
        aTextRangeListResult = NULL;
        return;
    }

    PangoAttrIterator * aFeedbackIterator;
    aFeedbackIterator = pango_attr_list_get_iterator((PangoAttrList*)aFeedback);
    //(reinterpret_cast<PangoAttrList*>(aFeedback));
    // Since some compilers don't permit this casting -- from const to un-const
    if (aFeedbackIterator == NULL) return;

    /*
     * Don't use pango_attr_iterator_range, it'll mislead you.
     * As for going through the list to get the attribute number,
     * it take much time for performance.
     * Now it's simple and enough, although maybe waste a little space.
    */
    PRInt32 aMaxLenOfTextRange;
    aMaxLenOfTextRange = 2*aLen + 1;
    *aTextRangeListResult = new nsTextRange[aMaxLenOfTextRange];
    NS_ASSERTION(*aTextRangeListResult, "No enough memory.");

    // Set caret's postion
    SET_FEEDBACKTYPE(0, NS_TEXTRANGE_CARETPOSITION);
    START_OFFSET(0) = aCursorPos;
    END_OFFSET(0) = aCursorPos;

    int count = 0;
    PangoAttribute * aPangoAttr;
    PangoAttribute * aPangoAttrReverse, * aPangoAttrUnderline;
    /*
     * Depend on gtk2's implementation on XIM support.
     * In aFeedback got from gtk2, there are only three types of data:
     * PANGO_ATTR_UNDERLINE, PANGO_ATTR_FOREGROUND, PANGO_ATTR_BACKGROUND.
     * Corresponding to XIMUnderline, XIMReverse.
     * Don't take PANGO_ATTR_BACKGROUND into account, since
     * PANGO_ATTR_BACKGROUND and PANGO_ATTR_FOREGROUND are always
     * a couple.
     */
    gint start, end;
    gunichar2 * uniStr;
    glong uniStrLen;
    do {
        aPangoAttrUnderline = pango_attr_iterator_get(aFeedbackIterator,
                                                      PANGO_ATTR_UNDERLINE);
        aPangoAttrReverse = pango_attr_iterator_get(aFeedbackIterator,
                                                    PANGO_ATTR_FOREGROUND);
        if (!aPangoAttrUnderline && !aPangoAttrReverse)
            continue;

        // Get the range of the current attribute(s)
        pango_attr_iterator_range(aFeedbackIterator, &start, &end);

        PRUint32 feedbackType = 0;
        // XIMReverse | XIMUnderline
        if (aPangoAttrUnderline && aPangoAttrReverse) {
            feedbackType = NS_TEXTRANGE_SELECTEDCONVERTEDTEXT;
            // Doesn't matter which attribute we use here since we
            // are using pango_attr_iterator_range to determine the
            // range of the attributes.
            aPangoAttr = aPangoAttrUnderline;
        }
        // XIMUnderline
        else if (aPangoAttrUnderline) {
            feedbackType = NS_TEXTRANGE_CONVERTEDTEXT;
            aPangoAttr = aPangoAttrUnderline;
        }
        // XIMReverse
        else if (aPangoAttrReverse) {
            feedbackType = NS_TEXTRANGE_SELECTEDRAWTEXT;
            aPangoAttr = aPangoAttrReverse;
        }

        count++;
        START_OFFSET(count) = 0;
        END_OFFSET(count) = 0;

        uniStr = NULL;
        if (start > 0) {
            uniStr = g_utf8_to_utf16(aPreeditString, start,
                                     NULL, &uniStrLen, NULL);
        }
        if (uniStr) {
            START_OFFSET(count) = uniStrLen;
            g_free(uniStr);
        }

        uniStr = NULL;
        uniStr = g_utf8_to_utf16(aPreeditString + start, end - start,
                                 NULL, &uniStrLen, NULL);
        if (uniStr) {
            END_OFFSET(count) = START_OFFSET(count) + uniStrLen;
            SET_FEEDBACKTYPE(count, feedbackType);
            g_free(uniStr);
        }

    } while ((count < aMaxLenOfTextRange - 1) &&
             (pango_attr_iterator_next(aFeedbackIterator)));

   *aTextRangeListLengthResult = count + 1;

   pango_attr_iterator_destroy(aFeedbackIterator);
}

/* static */
nsWindow *
IM_get_owning_window(MozDrawingarea *aArea)
{
    if (!aArea)
        return nsnull;
    GtkWidget *owningWidget =
        get_gtk_widget_for_gdk_window(aArea->inner_window);
    if (!owningWidget)
        return nsnull;
    return get_window_for_gtk_widget(owningWidget);
}

/* static */
GtkIMContext *
IM_get_input_context(nsWindow *aWindow)
{
    if (!aWindow)
        return nsnull;
    nsWindow::nsIMEData *data = aWindow->mIMEData;
    if (!data)
        return nsnull;
    return data->mEnabled ? data->mContext : data->mDummyContext;
}

#endif

// return the gfxASurface for rendering to this widget
gfxASurface*
nsWindow::GetThebesSurface()
{
    // XXXvlad always create a new thebes surface for now,
    // because the old clip doesn't get cleared otherwise.
    // we should fix this at some point, and just reset
    // the clip.
    mThebesSurface = nsnull;

    if (!mThebesSurface) {
        GdkDrawable* d = GDK_DRAWABLE(mDrawingarea->inner_window);
        gint width, height;
        gdk_drawable_get_size(d, &width, &height);
        if (!gfxPlatform::UseGlitz()) {
            mThebesSurface = new gfxXlibSurface
                (GDK_WINDOW_XDISPLAY(d),
                 GDK_WINDOW_XWINDOW(d),
                 GDK_VISUAL_XVISUAL(gdk_drawable_get_visual(d)),
                 gfxIntSize(width, height));
            if (mThebesSurface && !mThebesSurface->CairoStatus()) {
                gfxPlatformGtk::GetPlatform()->SetSurfaceGdkWindow(mThebesSurface, GDK_WINDOW(d));
            }
            else {
                mThebesSurface = nsnull;
            }
        } else {
#ifdef MOZ_ENABLE_GLITZ
            glitz_surface_t *gsurf;
            glitz_drawable_t *gdraw;

            glitz_drawable_format_t *gdformat = glitz_glx_find_window_format (GDK_DISPLAY(),
                                                                              gdk_x11_get_default_screen(),
                                                                              0, NULL, 0);
            if (!gdformat)
                NS_ERROR("Failed to find glitz drawable format");

            Display* dpy = GDK_WINDOW_XDISPLAY(d);
            Window wnd = GDK_WINDOW_XWINDOW(d);
            
            gdraw =
                glitz_glx_create_drawable_for_window (dpy,
                                                      DefaultScreen(dpy),
                                                      gdformat,
                                                      wnd,
                                                      width,
                                                      height);
            glitz_format_t *gformat =
                glitz_find_standard_format (gdraw, GLITZ_STANDARD_RGB24);
            gsurf =
                glitz_surface_create (gdraw,
                                      gformat,
                                      width,
                                      height,
                                      0,
                                      NULL);
            glitz_surface_attach (gsurf, gdraw, GLITZ_DRAWABLE_BUFFER_FRONT_COLOR);


            //fprintf (stderr, "## nsThebesDrawingSurface::Init Glitz DRAWABLE %p (DC: %p)\n", aWidget, aDC);
            mThebesSurface = new gfxGlitzSurface (gdraw, gsurf, PR_TRUE);
#endif
        }
    }

    return mThebesSurface;
}