gtk2/gtk/gtkwindow.c

/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

#include "config.h"

#include "gtkwindowprivate.h"

#include "gtkaccelgroupprivate.h"
#include "gtkactionable.h"
#include "gtkapplicationprivate.h"
#include "gtkbuildable.h"
#include "gtkbuilderprivate.h"
#include "gtkcheckbutton.h"
#include "gtkcsscornervalueprivate.h"
#include "gtkcsscolorvalueprivate.h"
#include "gtkcssshadowvalueprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkdroptargetasync.h"
#include "gtkeventcontrollerlegacy.h"
#include "gtkeventcontrollerkey.h"
#include "gtkeventcontrollermotion.h"
#include "gtkgestureclick.h"
#include "gtkheaderbar.h"
#include "gtkicontheme.h"
#include "gtkintl.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkmessagedialog.h"
#include "gtkpointerfocusprivate.h"
#include "gtkprivate.h"
#include "gtkroot.h"
#include "gtknative.h"
#include "gtksettings.h"
#include "gtkshortcut.h"
#include "gtkshortcutcontroller.h"
#include "gtkshortcutmanager.h"
#include "gtkshortcuttrigger.h"
#include "gtksnapshot.h"
#include "gtkstylecontextprivate.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "gtkwindowgroup.h"
#include "gtkpopovermenubarprivate.h"
#include "gtkcssboxesimplprivate.h"
#include "gtktooltipprivate.h"

#include "a11y/gtkwindowaccessibleprivate.h"
#include "inspector/window.h"

#include "gdk/gdktextureprivate.h"
#include "gdk/gdk-private.h"
#include "gdk/gdkprofilerprivate.h"

#include <cairo-gobject.h>
#include <errno.h>
#include <graphene.h>
#include <limits.h>
#include <string.h>
#include <stdlib.h>

#ifdef GDK_WINDOWING_X11
#include "x11/gdkx.h"
#endif

#ifdef GDK_WINDOWING_WIN32
#include "win32/gdkwin32.h"
#endif

#ifdef GDK_WINDOWING_WAYLAND
#include "wayland/gdkwayland.h"
#endif

#ifdef GDK_WINDOWING_BROADWAY
#include "broadway/gdkbroadway.h"
#endif

/**
 * SECTION:gtkwindow
 * @title: GtkWindow
 * @short_description: Toplevel which can contain other widgets
 *
 * A GtkWindow is a toplevel window which can contain other widgets.
 * Windows normally have decorations that are under the control
 * of the windowing system and allow the user to manipulate the window
 * (resize it, move it, close it,...).
 *
 * # GtkWindow as GtkBuildable
 *
 * The GtkWindow implementation of the #GtkBuildable interface supports a
 * custom <accel-groups> element, which supports any number of <group>
 * elements representing the #GtkAccelGroup objects you want to add to
 * your window (synonymous with gtk_window_add_accel_group().
 *
 * An example of a UI definition fragment with accel groups:
 * |[
 * <object class="GtkWindow">
 *   <accel-groups>
 *     <group name="accelgroup1"/>
 *   </accel-groups>
 * </object>
 * 
 * ...
 * 
 * <object class="GtkAccelGroup" id="accelgroup1"/>
 * ]|
 * 
 * The GtkWindow implementation of the #GtkBuildable interface supports
 * setting a child as the titlebar by specifying “titlebar” as the “type”
 * attribute of a <child> element.
 *
 * # CSS nodes
 *
 * |[<!-- language="plain" -->
 * window.background
 * ├── decoration
 * ├── <titlebar child>.titlebar [.default-decoration]
 * ╰── <child>
 * ]|
 *
 * GtkWindow has a main CSS node with name window and style class .background,
 * and a subnode with name decoration.
 *
 * Style classes that are typically used with the main CSS node are .csd (when
 * client-side decorations are in use), .solid-csd (for client-side decorations
 * without invisible borders), .ssd (used by mutter when rendering server-side
 * decorations). GtkWindow also represents window states with the following
 * style classes on the main node: .tiled, .maximized, .fullscreen. Specialized
 * types of window often add their own discriminating style classes, such as
 * .popup or .tooltip.
 *
 * GtkWindow adds the .titlebar and .default-decoration style classes to the
 * widget that is added as a titlebar child.
 */

#define MENU_BAR_ACCEL GDK_KEY_F10
#define RESIZE_HANDLE_SIZE 20
#define MNEMONICS_DELAY 300 /* ms */
#define NO_CONTENT_CHILD_NAT 200 /* ms */
#define VISIBLE_FOCUS_DURATION 3 /* s */


/* In case the content (excluding header bar and shadows) of the window
 * would be empty, either because there is no visible child widget or only an
 * empty container widget, we use NO_CONTENT_CHILD_NAT as natural width/height
 * instead.
 */

typedef struct
{
  GtkWidget             *child;

  GtkWidget             *default_widget;
  GtkWidget             *focus_widget;
  GtkWindow             *transient_parent;
  GtkWindowGeometryInfo *geometry_info;
  GtkWindowGroup        *group;
  GdkDisplay            *display;
  GtkApplication        *application;

  gchar   *startup_id;
  gchar   *title;

  guint    keys_changed_handler;

  guint32  initial_timestamp;

  guint16  configure_request_count;

  guint    mnemonics_display_timeout_id;

  guint    focus_visible_timeout;

  gint     scale;

  gint title_height;
  GtkWidget *title_box;
  GtkWidget *titlebar;
  GtkWidget *key_press_focus;

  GdkMonitor *initial_fullscreen_monitor;
  guint      edge_constraints;

  GdkSurfaceState state;

  /* The following flags are initially TRUE (before a window is mapped).
   * They cause us to compute a configure request that involves
   * default-only parameters. Once mapped, we set them to FALSE.
   * Then we set them to TRUE again on unmap (for position)
   * and on unrealize (for size).
   */
  guint    need_default_size         : 1;

  guint    builder_visible           : 1;
  guint    configure_notify_received : 1;
  guint    decorated                 : 1;
  guint    deletable                 : 1;
  guint    destroy_with_parent       : 1;
  guint    fullscreen_initially      : 1;
  guint    minimize_initially        : 1;
  guint    is_active                 : 1;
  guint    maximize_initially        : 1;
  guint    mnemonics_visible         : 1;
  guint    focus_visible             : 1;
  guint    modal                     : 1;
  guint    resizable                 : 1;
  guint    transient_parent_group    : 1;
  guint    gravity                   : 5; /* GdkGravity */
  guint    csd_requested             : 1;
  guint    client_decorated          : 1; /* Decorations drawn client-side */
  guint    use_client_shadow         : 1; /* Decorations use client-side shadows */
  guint    maximized                 : 1;
  guint    fullscreen                : 1;
  guint    tiled                     : 1;

  guint    hide_on_close             : 1;
  guint    in_emit_close_request     : 1;

  GdkSurfaceTypeHint type_hint;

  GtkGesture *click_gesture;
  GtkEventController *key_controller;
  GtkEventController *application_shortcut_controller;

  GtkCssNode *decoration_node;

  GdkSurface  *surface;
  GskRenderer *renderer;

  cairo_region_t *extra_input_region;

  GList *foci;

  GtkConstraintSolver *constraint_solver;
  GdkToplevelLayout *layout;

  GdkCursor *resize_cursor;
} GtkWindowPrivate;

enum {
  SET_FOCUS,
  ACTIVATE_FOCUS,
  ACTIVATE_DEFAULT,
  KEYS_CHANGED,
  ENABLE_DEBUGGING,
  CLOSE_REQUEST,
  LAST_SIGNAL
};

enum {
  PROP_0,

  /* Normal Props */
  PROP_TITLE,
  PROP_RESIZABLE,
  PROP_MODAL,
  PROP_DEFAULT_WIDTH,
  PROP_DEFAULT_HEIGHT,
  PROP_DESTROY_WITH_PARENT,
  PROP_HIDE_ON_CLOSE,
  PROP_ICON_NAME,
  PROP_DISPLAY,
  PROP_DECORATED,
  PROP_DELETABLE,
  PROP_TRANSIENT_FOR,
  PROP_APPLICATION,
  PROP_DEFAULT_WIDGET,
  PROP_FOCUS_WIDGET,
  PROP_CHILD,

  /* Readonly properties */
  PROP_IS_ACTIVE,

  /* Writeonly properties */
  PROP_STARTUP_ID,

  PROP_MNEMONICS_VISIBLE,
  PROP_FOCUS_VISIBLE,

  PROP_IS_MAXIMIZED,

  LAST_ARG
};

static GParamSpec *window_props[LAST_ARG] = { NULL, };

/* Must be kept in sync with GdkSurfaceEdge ! */
typedef enum
{
  GTK_WINDOW_REGION_EDGE_NW,
  GTK_WINDOW_REGION_EDGE_N,
  GTK_WINDOW_REGION_EDGE_NE,
  GTK_WINDOW_REGION_EDGE_W,
  GTK_WINDOW_REGION_EDGE_E,
  GTK_WINDOW_REGION_EDGE_SW,
  GTK_WINDOW_REGION_EDGE_S,
  GTK_WINDOW_REGION_EDGE_SE,
  GTK_WINDOW_REGION_CONTENT,
} GtkWindowRegion;

typedef struct
{
  gchar     *icon_name;
  guint      realized : 1;
  guint      using_default_icon : 1;
  guint      using_themed_icon : 1;
} GtkWindowIconInfo;

typedef struct {
  GdkGeometry    geometry; /* Last set of geometry hints we set */
  GdkSurfaceHints flags;
  GdkRectangle   configure_request;
} GtkWindowLastGeometryInfo;

struct _GtkWindowGeometryInfo
{
  /* from last gtk_window_resize () - if > 0, indicates that
   * we should resize to this size.
   */
  gint           resize_width;  
  gint           resize_height;

  /* Default size - used only the FIRST time we map a window,
   * only if > 0.
   */
  gint           default_width; 
  gint           default_height;

  GtkWindowLastGeometryInfo last;
};


static void gtk_window_constructed        (GObject           *object);
static void gtk_window_dispose            (GObject           *object);
static void gtk_window_finalize           (GObject           *object);
static void gtk_window_show               (GtkWidget         *widget);
static void gtk_window_hide               (GtkWidget         *widget);
static void gtk_window_map                (GtkWidget         *widget);
static void gtk_window_unmap              (GtkWidget         *widget);
static void gtk_window_realize            (GtkWidget         *widget);
static void gtk_window_unrealize          (GtkWidget         *widget);
static void gtk_window_size_allocate      (GtkWidget         *widget,
                                           int                width,
                                           int                height,
                                           int                  baseline);
static gboolean gtk_window_close_request  (GtkWindow         *window);
static gboolean gtk_window_handle_focus   (GtkWidget         *widget,
                                           GdkEvent          *event,
                                           double             x,
                                           double             y);
static gboolean gtk_window_key_pressed    (GtkWidget         *widget,
                                           guint              keyval,
                                           guint              keycode,
                                           GdkModifierType    state,
                                           gpointer           data);
static gboolean gtk_window_key_released   (GtkWidget         *widget,
                                           guint              keyval,
                                           guint              keycode,
                                           GdkModifierType    state,
                                           gpointer           data);

static void     surface_state_changed     (GtkWidget          *widget);
static void     surface_size_changed      (GtkWidget          *widget,
                                           int                 width,
                                           int                 height);
static gboolean surface_render            (GdkSurface         *surface,
                                           cairo_region_t     *region,
                                           GtkWidget          *widget);
static gboolean surface_event             (GdkSurface         *surface,
                                           GdkEvent           *event,
                                           GtkWidget          *widget);

static gint gtk_window_focus              (GtkWidget        *widget,
				           GtkDirectionType  direction);
static void gtk_window_move_focus         (GtkWidget         *widget,
                                           GtkDirectionType   dir);

static void gtk_window_real_activate_default (GtkWindow         *window);
static void gtk_window_real_activate_focus   (GtkWindow         *window);
static void gtk_window_keys_changed          (GtkWindow         *window);
static gboolean gtk_window_enable_debugging  (GtkWindow         *window,
                                              gboolean           toggle);
static void gtk_window_snapshot                    (GtkWidget   *widget,
                                                    GtkSnapshot *snapshot);
static void gtk_window_unset_transient_for         (GtkWindow  *window);
static void gtk_window_transient_parent_realized   (GtkWidget  *parent,
						    GtkWidget  *window);
static void gtk_window_transient_parent_unrealized (GtkWidget  *parent,
						    GtkWidget  *window);

static GtkWindowGeometryInfo* gtk_window_get_geometry_info         (GtkWindow    *window,
                                                                    gboolean      create);

static void     gtk_window_move_resize               (GtkWindow    *window);
static gboolean gtk_window_compare_hints             (GdkGeometry  *geometry_a,
                                                      guint         flags_a,
                                                      GdkGeometry  *geometry_b,
                                                      guint         flags_b);
static void     gtk_window_constrain_size            (GtkWindow    *window,
                                                      GdkGeometry  *geometry,
                                                      guint         flags,
                                                      gint          width,
                                                      gint          height,
                                                      gint         *new_width,
                                                      gint         *new_height);
static void     gtk_window_update_fixed_size         (GtkWindow    *window,
                                                      GdkGeometry  *new_geometry,
                                                      gint          new_width,
                                                      gint          new_height);
static void     gtk_window_compute_hints             (GtkWindow    *window,
                                                      GdkGeometry  *new_geometry,
                                                      guint        *new_flags);
static void     gtk_window_compute_configure_request (GtkWindow    *window,
                                                      GdkRectangle *request,
                                                      GdkGeometry  *geometry,
                                                      guint        *flags);

static void     gtk_window_set_default_size_internal (GtkWindow    *window,
                                                      gboolean      change_width,
                                                      gint          width,
                                                      gboolean      change_height,
                                                      gint          height);

static void     update_themed_icon                    (GtkWindow    *window);
static GList   *icon_list_from_theme                  (GtkWindow    *window,
						       const gchar  *name);
static void     gtk_window_realize_icon               (GtkWindow    *window);
static void     gtk_window_unrealize_icon             (GtkWindow    *window);
static void     update_window_actions                 (GtkWindow    *window);
static void     get_shadow_width                      (GtkWindow    *window,
                                                       GtkBorder    *shadow_width);

static gboolean    gtk_window_activate_menubar        (GtkWidget    *widget,
                                                       GVariant     *args,
                                                       gpointer      unused);
#ifdef GDK_WINDOWING_X11
static void        gtk_window_on_theme_variant_changed (GtkSettings *settings,
                                                        GParamSpec  *pspec,
                                                        GtkWindow   *window);
#endif
static void        gtk_window_set_theme_variant         (GtkWindow  *window);

static void gtk_window_activate_default_activate (GtkWidget *widget,
                                                  const char *action_name,
                                                  GVariant *parameter);
static void gtk_window_activate_minimize (GtkWidget  *widget,
                                          const char *action_name,
                                          GVariant   *parameter);
static void gtk_window_activate_toggle_maximized (GtkWidget  *widget,
                                                  const char *name,
                                                  GVariant   *parameter);
static void gtk_window_activate_close (GtkWidget  *widget,
                                       const char *action_name,
                                       GVariant   *parameter);

static void        gtk_window_css_changed               (GtkWidget      *widget,
                                                         GtkCssStyleChange *change);
static void gtk_window_state_flags_changed (GtkWidget     *widget,
					     GtkStateFlags  previous_state);
static void _gtk_window_set_is_active (GtkWindow *window,
			               gboolean   is_active);
static void gtk_window_present_toplevel (GtkWindow *window);
static void gtk_window_update_toplevel (GtkWindow *window);
static GdkToplevelLayout * gtk_window_compute_layout (GtkWindow *window,
                                                      int        min_width,
                                                      int        min_height);

static void gtk_window_release_application (GtkWindow *window);

static GListStore  *toplevel_list = NULL;
static guint        window_signals[LAST_SIGNAL] = { 0 };
static gchar       *default_icon_name = NULL;
static gboolean     disable_startup_notification = FALSE;

static GQuark       quark_gtk_window_icon_info = 0;

static GtkBuildableIface *parent_buildable_iface;

static void gtk_window_set_property (GObject         *object,
				     guint            prop_id,
				     const GValue    *value,
				     GParamSpec      *pspec);
static void gtk_window_get_property (GObject         *object,
				     guint            prop_id,
				     GValue          *value,
				     GParamSpec      *pspec);

/* GtkBuildable */
static void     gtk_window_buildable_interface_init         (GtkBuildableIface  *iface);
static void     gtk_window_buildable_add_child              (GtkBuildable       *buildable,
                                                             GtkBuilder         *builder,
                                                             GObject            *child,
                                                             const gchar        *type);
static void     gtk_window_buildable_set_buildable_property (GtkBuildable       *buildable,
                                                             GtkBuilder         *builder,
                                                             const gchar        *name,
                                                             const GValue       *value);

static void             gtk_window_shortcut_manager_interface_init      (GtkShortcutManagerInterface *iface);
/* GtkRoot */
static void             gtk_window_root_interface_init (GtkRootInterface *iface);
static void             gtk_window_native_interface_init  (GtkNativeInterface  *iface);

static void ensure_state_flag_backdrop (GtkWidget *widget);
static void unset_titlebar (GtkWindow *window);
static GtkWindowRegion get_active_region_type (GtkWindow   *window,
                                               gint         x,
                                               gint         y);


G_DEFINE_TYPE_WITH_CODE (GtkWindow, gtk_window, GTK_TYPE_WIDGET,
                         G_ADD_PRIVATE (GtkWindow)
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
						gtk_window_buildable_interface_init)
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_NATIVE,
						gtk_window_native_interface_init)
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_SHORTCUT_MANAGER,
						gtk_window_shortcut_manager_interface_init)
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_ROOT,
						gtk_window_root_interface_init))

static void
add_tab_bindings (GtkWidgetClass   *widget_class,
		  GdkModifierType   modifiers,
		  GtkDirectionType  direction)
{
  GtkShortcut *shortcut;

  shortcut = gtk_shortcut_new_with_arguments (
                 gtk_alternative_trigger_new (gtk_keyval_trigger_new (GDK_KEY_Tab, modifiers),
                                              gtk_keyval_trigger_new (GDK_KEY_KP_Tab, modifiers)),
                 gtk_signal_action_new ("move-focus"),
                 "(i)", direction);

  gtk_widget_class_add_shortcut (widget_class, shortcut);

  g_object_unref (shortcut);
}

static void
add_arrow_bindings (GtkWidgetClass   *widget_class,
		    guint             keysym,
		    GtkDirectionType  direction)
{
  guint keypad_keysym = keysym - GDK_KEY_Left + GDK_KEY_KP_Left;
  
  gtk_widget_class_add_binding_signal (widget_class, keysym, 0,
                                       "move-focus",
                                       "(i)",
                                       direction);
  gtk_widget_class_add_binding_signal (widget_class, keysym, GDK_CONTROL_MASK,
                                       "move-focus",
                                       "(i)",
                                       direction);
  gtk_widget_class_add_binding_signal (widget_class, keypad_keysym, 0,
                                       "move-focus",
                                       "(i)",
                                       direction);
  gtk_widget_class_add_binding_signal (widget_class, keypad_keysym, GDK_CONTROL_MASK,
                                       "move-focus",
                                       "(i)",
                                       direction);
}

static guint32
extract_time_from_startup_id (const gchar* startup_id)
{
  gchar *timestr = g_strrstr (startup_id, "_TIME");
  guint32 retval = GDK_CURRENT_TIME;

  if (timestr)
    {
      gchar *end;
      guint32 timestamp; 
    
      /* Skip past the "_TIME" part */
      timestr += 5;

      end = NULL;
      errno = 0;
      timestamp = g_ascii_strtoull (timestr, &end, 0);
      if (errno == 0 && end != timestr)
        retval = timestamp;
    }

  return retval;
}

static gboolean
startup_id_is_fake (const gchar* startup_id)
{
  return strncmp (startup_id, "_TIME", 5) == 0;
}

static void
gtk_window_measure (GtkWidget      *widget,
                    GtkOrientation  orientation,
                    int             for_size,
                    int            *minimum,
                    int            *natural,
                    int            *minimum_baseline,
                    int            *natural_baseline)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *child = priv->child;
  gboolean has_size_request = gtk_widget_has_size_request (widget);
  int title_min_size = 0;
  int title_nat_size = 0;
  int child_min_size = 0;
  int child_nat_size = 0;
  GtkBorder window_border = { 0 };


  if (priv->decorated && !priv->fullscreen)
    {
      get_shadow_width (window, &window_border);

      if (orientation == GTK_ORIENTATION_HORIZONTAL)
        for_size -= window_border.left + window_border.right;
      else
        for_size -= window_border.top + window_border.bottom;

      if (priv->title_box != NULL &&
          gtk_widget_get_visible (priv->title_box) &&
          gtk_widget_get_child_visible (priv->title_box))
        {
          int size = for_size;
          if (orientation == GTK_ORIENTATION_HORIZONTAL && for_size >= 0)
            gtk_widget_measure (priv->title_box,
                                GTK_ORIENTATION_VERTICAL,
                                -1,
                                NULL, &size,
                                NULL, NULL);

          gtk_widget_measure (priv->title_box,
                              orientation,
                              MAX (size, -1),
                              &title_min_size, &title_nat_size,
                              NULL, NULL);
        }
    }

  if (child != NULL && gtk_widget_get_visible (child))
    {
      gtk_widget_measure (child,
                          orientation,
                          MAX (for_size, -1),
                          &child_min_size, &child_nat_size,
                          NULL, NULL);

      if (child_nat_size == 0 && !has_size_request)
        child_nat_size = NO_CONTENT_CHILD_NAT;
    }
  else if (!has_size_request)
    {
      child_nat_size = NO_CONTENT_CHILD_NAT;
    }

  if (orientation == GTK_ORIENTATION_HORIZONTAL)
    {
      title_min_size += window_border.left + window_border.right;
      title_nat_size += window_border.left + window_border.right;
      child_min_size += window_border.left + window_border.right;
      child_nat_size += window_border.left + window_border.right;
      *minimum = MAX (title_min_size, child_min_size);
      *natural = MAX (title_nat_size, child_nat_size);
    }
  else
    {
      *minimum = title_min_size + child_min_size + window_border.top + window_border.bottom;
      *natural = title_nat_size + child_nat_size + window_border.top + window_border.bottom;
    }
}

static void
gtk_window_compute_expand (GtkWidget *widget,
                           gboolean  *hexpand,
                           gboolean  *vexpand)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->child)
    {
      *hexpand = gtk_widget_compute_expand (priv->child, GTK_ORIENTATION_HORIZONTAL);
      *vexpand = gtk_widget_compute_expand (priv->child, GTK_ORIENTATION_VERTICAL);
    }
  else
    {
      *hexpand = FALSE;
      *vexpand = FALSE;
    }
}

static GtkSizeRequestMode
gtk_window_get_request_mode (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->child)
    return gtk_widget_get_request_mode (priv->child);
  else
    return GTK_SIZE_REQUEST_CONSTANT_SIZE;
}

static void
gtk_window_class_init (GtkWindowClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

  quark_gtk_window_icon_info = g_quark_from_static_string ("gtk-window-icon-info");

  if (toplevel_list == NULL)
    toplevel_list = g_list_store_new (GTK_TYPE_WIDGET);

  gobject_class->constructed = gtk_window_constructed;
  gobject_class->dispose = gtk_window_dispose;
  gobject_class->finalize = gtk_window_finalize;

  gobject_class->set_property = gtk_window_set_property;
  gobject_class->get_property = gtk_window_get_property;

  widget_class->show = gtk_window_show;
  widget_class->hide = gtk_window_hide;
  widget_class->map = gtk_window_map;
  widget_class->unmap = gtk_window_unmap;
  widget_class->realize = gtk_window_realize;
  widget_class->unrealize = gtk_window_unrealize;
  widget_class->size_allocate = gtk_window_size_allocate;
  widget_class->measure = gtk_window_measure;
  widget_class->compute_expand = gtk_window_compute_expand;
  widget_class->get_request_mode = gtk_window_get_request_mode;
  widget_class->focus = gtk_window_focus;
  widget_class->move_focus = gtk_window_move_focus;
  widget_class->state_flags_changed = gtk_window_state_flags_changed;
  widget_class->css_changed = gtk_window_css_changed;
  widget_class->snapshot = gtk_window_snapshot;

  klass->activate_default = gtk_window_real_activate_default;
  klass->activate_focus = gtk_window_real_activate_focus;
  klass->keys_changed = gtk_window_keys_changed;
  klass->enable_debugging = gtk_window_enable_debugging;
  klass->close_request = gtk_window_close_request;

  window_props[PROP_TITLE] =
      g_param_spec_string ("title",
                           P_("Window Title"),
                           P_("The title of the window"),
                           NULL,
                           GTK_PARAM_READWRITE);

  /**
   * GtkWindow:startup-id:
   *
   * The :startup-id is a write-only property for setting window's
   * startup notification identifier. See gtk_window_set_startup_id()
   * for more details.
   */
  window_props[PROP_STARTUP_ID] =
      g_param_spec_string ("startup-id",
                           P_("Startup ID"),
                           P_("Unique startup identifier for the window used by startup-notification"),
                           NULL,
                           GTK_PARAM_WRITABLE);

  window_props[PROP_RESIZABLE] =
      g_param_spec_boolean ("resizable",
                            P_("Resizable"),
                            P_("If TRUE, users can resize the window"),
                            TRUE,
                            GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_MODAL] =
      g_param_spec_boolean ("modal",
                            P_("Modal"),
                            P_("If TRUE, the window is modal (other windows are not usable while this one is up)"),
                            FALSE,
                            GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_DEFAULT_WIDTH] =
      g_param_spec_int ("default-width",
                        P_("Default Width"),
                        P_("The default width of the window, used when initially showing the window"),
                        -1, G_MAXINT,
                        -1,
                        GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_DEFAULT_HEIGHT] =
      g_param_spec_int ("default-height",
                        P_("Default Height"),
                        P_("The default height of the window, used when initially showing the window"),
                        -1, G_MAXINT,
                        -1,
                        GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_DESTROY_WITH_PARENT] =
      g_param_spec_boolean ("destroy-with-parent",
                            P_("Destroy with Parent"),
                            P_("If this window should be destroyed when the parent is destroyed"),
                            FALSE,
                            GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_HIDE_ON_CLOSE] =
      g_param_spec_boolean ("hide-on-close",
                            P_("Hide on close"),
                            P_("If this window should be hidden when the user clicks the close button"),
                            FALSE,
                            GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
  /**
   * GtkWindow:mnemonics-visible:
   *
   * Whether mnemonics are currently visible in this window.
   *
   * This property is maintained by GTK+ based on user input,
   * and should not be set by applications.
   */
  window_props[PROP_MNEMONICS_VISIBLE] =
      g_param_spec_boolean ("mnemonics-visible",
                            P_("Mnemonics Visible"),
                            P_("Whether mnemonics are currently visible in this window"),
                            FALSE,
                            GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  /**
   * GtkWindow:focus-visible:
   *
   * Whether 'focus rectangles' are currently visible in this window.
   *
   * This property is maintained by GTK+ based on user input
   * and should not be set by applications.
   */
  window_props[PROP_FOCUS_VISIBLE] =
      g_param_spec_boolean ("focus-visible",
                            P_("Focus Visible"),
                            P_("Whether focus rectangles are currently visible in this window"),
                            TRUE,
                            GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  /**
   * GtkWindow:icon-name:
   *
   * The :icon-name property specifies the name of the themed icon to
   * use as the window icon. See #GtkIconTheme for more details.
   */
  window_props[PROP_ICON_NAME] =
      g_param_spec_string ("icon-name",
                           P_("Icon Name"),
                           P_("Name of the themed icon for this window"),
                           NULL,
                           GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_DISPLAY] =
      g_param_spec_object ("display",
                           P_("Display"),
                           P_("The display that will display this window"),
                           GDK_TYPE_DISPLAY,
                           GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_IS_ACTIVE] =
      g_param_spec_boolean ("is-active",
                            P_("Is Active"),
                            P_("Whether the toplevel is the current active window"),
                            FALSE,
                            GTK_PARAM_READABLE);

  /**
   * GtkWindow:decorated:
   *
   * Whether the window should be decorated by the window manager.
   */
  window_props[PROP_DECORATED] =
      g_param_spec_boolean ("decorated",
                            P_("Decorated"),
                            P_("Whether the window should be decorated by the window manager"),
                            TRUE,
                            GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  /**
   * GtkWindow:deletable:
   *
   * Whether the window frame should have a close button.
   */
  window_props[PROP_DELETABLE] =
      g_param_spec_boolean ("deletable",
                            P_("Deletable"),
                            P_("Whether the window frame should have a close button"),
                            TRUE,
                            GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);

  /**
   * GtkWindow:transient-for:
   *
   * The transient parent of the window. See gtk_window_set_transient_for() for
   * more details about transient windows.
   */
  window_props[PROP_TRANSIENT_FOR] =
      g_param_spec_object ("transient-for",
                           P_("Transient for Window"),
                           P_("The transient parent of the dialog"),
                           GTK_TYPE_WINDOW,
                           GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_IS_MAXIMIZED] =
      g_param_spec_boolean ("is-maximized",
                            P_("Is maximized"),
                            P_("Whether the window is maximized"),
                            FALSE,
                            GTK_PARAM_READABLE);

  /**
   * GtkWindow:application:
   *
   * The #GtkApplication associated with the window.
   *
   * The application will be kept alive for at least as long as it
   * has any windows associated with it (see g_application_hold()
   * for a way to keep it alive without windows).
   *
   * Normally, the connection between the application and the window
   * will remain until the window is destroyed, but you can explicitly
   * remove it by setting the :application property to %NULL.
   */
  window_props[PROP_APPLICATION] =
      g_param_spec_object ("application",
                           P_("GtkApplication"),
                           P_("The GtkApplication for the window"),
                           GTK_TYPE_APPLICATION,
                           GTK_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_DEFAULT_WIDGET] =
      g_param_spec_object ("default-widget",
                           P_("Default widget"),
                           P_("The default widget"),
                           GTK_TYPE_WIDGET,
                           GTK_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_FOCUS_WIDGET] =
      g_param_spec_object ("focus-widget",
                           P_("Focus widget"),
                           P_("The focus widget"),
                           GTK_TYPE_WIDGET,
                           GTK_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);

  window_props[PROP_CHILD] =
      g_param_spec_object ("child",
                           P_("Child"),
                           P_("The child widget"),
                           GTK_TYPE_WIDGET,
                           GTK_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);


  g_object_class_install_properties (gobject_class, LAST_ARG, window_props);

  /**
   * GtkWindow::activate-focus:
   * @window: the window which received the signal
   *
   * The ::activate-focus signal is a
   * [keybinding signal][GtkBindingSignal]
   * which gets emitted when the user activates the currently
   * focused widget of @window.
   */
  window_signals[ACTIVATE_FOCUS] =
    g_signal_new (I_("activate-focus"),
                  G_TYPE_FROM_CLASS (gobject_class),
                  G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
                  G_STRUCT_OFFSET (GtkWindowClass, activate_focus),
                  NULL, NULL,
                  NULL,
                  G_TYPE_NONE,
                  0);

  /**
   * GtkWindow::activate-default:
   * @window: the window which received the signal
   *
   * The ::activate-default signal is a
   * [keybinding signal][GtkBindingSignal]
   * which gets emitted when the user activates the default widget
   * of @window.
   */
  window_signals[ACTIVATE_DEFAULT] =
    g_signal_new (I_("activate-default"),
                  G_TYPE_FROM_CLASS (gobject_class),
                  G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
                  G_STRUCT_OFFSET (GtkWindowClass, activate_default),
                  NULL, NULL,
                  NULL,
                  G_TYPE_NONE,
                  0);

  /**
   * GtkWindow::keys-changed:
   * @window: the window which received the signal
   *
   * The ::keys-changed signal gets emitted when the set of accelerators
   * or mnemonics that are associated with @window changes.
   */
  window_signals[KEYS_CHANGED] =
    g_signal_new (I_("keys-changed"),
                  G_TYPE_FROM_CLASS (gobject_class),
                  G_SIGNAL_RUN_FIRST,
                  G_STRUCT_OFFSET (GtkWindowClass, keys_changed),
                  NULL, NULL,
                  NULL,
                  G_TYPE_NONE,
                  0);

  /**
   * GtkWindow::enable-debugging:
   * @window: the window on which the signal is emitted
   * @toggle: toggle the debugger
   *
   * The ::enable-debugging signal is a [keybinding signal][GtkBindingSignal]
   * which gets emitted when the user enables or disables interactive
   * debugging. When @toggle is %TRUE, interactive debugging is toggled
   * on or off, when it is %FALSE, the debugger will be pointed at the
   * widget under the pointer.
   *
   * The default bindings for this signal are Ctrl-Shift-I
   * and Ctrl-Shift-D.
   *
   * Return: %TRUE if the key binding was handled
   */
  window_signals[ENABLE_DEBUGGING] =
    g_signal_new (I_("enable-debugging"),
                  G_TYPE_FROM_CLASS (gobject_class),
                  G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
                  G_STRUCT_OFFSET (GtkWindowClass, enable_debugging),
                  NULL, NULL,
                  _gtk_marshal_BOOLEAN__BOOLEAN,
                  G_TYPE_BOOLEAN,
                  1, G_TYPE_BOOLEAN);

  /**
   * GtkWindow::close-request:
   * @window: the window on which the signal is emitted
   *
   * The ::close-request signal is emitted when the user clicks on the close
   * button of the window.
   *
   * Return: %TRUE to stop other handlers from being invoked for the signal
   */
  window_signals[CLOSE_REQUEST] =
    g_signal_new (I_("close-request"),
                  G_TYPE_FROM_CLASS (gobject_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (GtkWindowClass, close_request),
                  _gtk_boolean_handled_accumulator, NULL,
                  NULL,
                  G_TYPE_BOOLEAN,
                  0);

  /*
   * Key bindings
   */

  /**
   * GtkWindow|default.activate:
   *
   * Activate the default widget.
   */
  gtk_widget_class_install_action (widget_class, "default.activate", NULL,
                                   gtk_window_activate_default_activate);

  /**
   * GtkWindow|window.minimize:
   *
   * Close the window.
   */
  gtk_widget_class_install_action (widget_class, "window.minimize", NULL,
                                   gtk_window_activate_minimize);

  /**
   * GtkWindow|window.toggle-maximized:
   *
   * Maximize or restore the window.
   */
  gtk_widget_class_install_action (widget_class, "window.toggle-maximized", NULL,
                                   gtk_window_activate_toggle_maximized);

  /**
   * GtkWindow|window.close:
   *
   * Close the window.
   */
  gtk_widget_class_install_action (widget_class, "window.close", NULL,
                                   gtk_window_activate_close);

  gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_space, 0,
                                       "activate-focus", NULL);
  gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_KP_Space, 0,
                                       "activate-focus", NULL);
  
  gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_Return, 0,
                                       "activate-default", NULL);
  gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_ISO_Enter, 0,
                                       "activate-default", NULL);
  gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_KP_Enter, 0,
                                       "activate-default", NULL);

  gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_I, GDK_CONTROL_MASK|GDK_SHIFT_MASK,
                                       "enable-debugging", "(b)", FALSE);
  gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_D, GDK_CONTROL_MASK|GDK_SHIFT_MASK,
                                       "enable-debugging", "(b)", TRUE);

  add_arrow_bindings (widget_class, GDK_KEY_Up, GTK_DIR_UP);
  add_arrow_bindings (widget_class, GDK_KEY_Down, GTK_DIR_DOWN);
  add_arrow_bindings (widget_class, GDK_KEY_Left, GTK_DIR_LEFT);
  add_arrow_bindings (widget_class, GDK_KEY_Right, GTK_DIR_RIGHT);

  add_tab_bindings (widget_class, 0, GTK_DIR_TAB_FORWARD);
  add_tab_bindings (widget_class, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD);
  add_tab_bindings (widget_class, GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
  add_tab_bindings (widget_class, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);

  gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_WINDOW_ACCESSIBLE);
  gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_FRAME);
  gtk_widget_class_set_css_name (widget_class, I_("window"));
}

/**
 * gtk_window_is_maximized:
 * @window: a #GtkWindow
 *
 * Retrieves the current maximized state of @window.
 *
 * Note that since maximization is ultimately handled by the window
 * manager and happens asynchronously to an application request, you
 * shouldn’t assume the return value of this function changing
 * immediately (or at all), as an effect of calling
 * gtk_window_maximize() or gtk_window_unmaximize().
 *
 * Returns: whether the window has a maximized state.
 */
gboolean
gtk_window_is_maximized (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->maximized;
}

void
_gtk_window_toggle_maximized (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->maximized)
    gtk_window_unmaximize (window);
  else
    gtk_window_maximize (window);
}

/**
 * gtk_window_close:
 * @window: a #GtkWindow
 *
 * Requests that the window is closed, similar to what happens
 * when a window manager close button is clicked.
 *
 * This function can be used with close buttons in custom
 * titlebars.
 */
void
gtk_window_close (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (!_gtk_widget_get_realized (GTK_WIDGET (window)))
    return;

  if (priv->in_emit_close_request)
    return;

  g_object_ref (window);

  if (!gtk_window_emit_close_request (window))
    gtk_window_destroy (window);

  g_object_unref (window);
}

static void
click_gesture_pressed_cb (GtkGestureClick *gesture,
                          gint             n_press,
                          gdouble          x,
                          gdouble          y,
                          GtkWindow       *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GdkEventSequence *sequence;
  GtkWindowRegion region;
  GdkEvent *event;
  guint button;
  double tx, ty;

  sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
  button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture));
  event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);

  if (!event)
    return;

  if (button != GDK_BUTTON_PRIMARY)
    return;

  if (priv->maximized)
    return;

  if (gdk_display_device_is_grabbed (gtk_widget_get_display (GTK_WIDGET (window)),
                                     gtk_gesture_get_device (GTK_GESTURE (gesture))))
    return;

  region = get_active_region_type (window, x, y);

  if (region == GTK_WINDOW_REGION_CONTENT)
    return;

  gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);

  gdk_event_get_position (event, &tx, &ty);
  gdk_surface_begin_resize_drag (priv->surface,
                                 (GdkSurfaceEdge) region,
                                 gdk_event_get_device ((GdkEvent *) event),
                                 GDK_BUTTON_PRIMARY,
                                 tx, ty,
                                 gdk_event_get_time (event));

  gtk_event_controller_reset (GTK_EVENT_CONTROLLER (gesture));
}

static void
node_style_changed_cb (GtkCssNode        *node,
                       GtkCssStyleChange *change,
                       GtkWidget         *widget)
{
  if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_SIZE))
    gtk_widget_queue_resize (widget);
  else
    gtk_widget_queue_draw (widget);
}

static void
device_removed_cb (GdkSeat   *seat,
                   GdkDevice *device,
                   gpointer   user_data)
{
  GtkWindow *window = user_data;
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GList *l = priv->foci;

  while (l)
    {
      GList *next;
      GtkPointerFocus *focus = l->data;

      next = l->next;

      if (focus->device == device)
        {
          priv->foci = g_list_delete_link (priv->foci, l);
          gtk_pointer_focus_unref (focus);
        }

      l = next;
    }
}

static guint
constraints_for_edge (GdkSurfaceEdge edge)
{
  switch (edge)
    {
    case GDK_SURFACE_EDGE_NORTH_WEST:
      return GDK_SURFACE_STATE_LEFT_RESIZABLE | GDK_SURFACE_STATE_TOP_RESIZABLE;
    case GDK_SURFACE_EDGE_NORTH:
      return GDK_SURFACE_STATE_TOP_RESIZABLE;
    case GDK_SURFACE_EDGE_NORTH_EAST:
      return GDK_SURFACE_STATE_RIGHT_RESIZABLE | GDK_SURFACE_STATE_TOP_RESIZABLE;
    case GDK_SURFACE_EDGE_WEST:
      return GDK_SURFACE_STATE_LEFT_RESIZABLE;
    case GDK_SURFACE_EDGE_EAST:
      return GDK_SURFACE_STATE_RIGHT_RESIZABLE;
    case GDK_SURFACE_EDGE_SOUTH_WEST:
      return GDK_SURFACE_STATE_LEFT_RESIZABLE | GDK_SURFACE_STATE_BOTTOM_RESIZABLE;
    case GDK_SURFACE_EDGE_SOUTH:
      return GDK_SURFACE_STATE_BOTTOM_RESIZABLE;
    case GDK_SURFACE_EDGE_SOUTH_EAST:
      return GDK_SURFACE_STATE_RIGHT_RESIZABLE | GDK_SURFACE_STATE_BOTTOM_RESIZABLE;
    default:
      g_warn_if_reached ();
      return 0;
    }
}

static gboolean
edge_under_coordinates (GtkWindow     *window,
                        gint           x,
                        gint           y,
                        GdkSurfaceEdge  edge)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkAllocation allocation;
  GtkStyleContext *context;
  gint handle_v, handle_h;
  GtkBorder border;
  gboolean supports_edge_constraints;
  guint constraints;

  if (!priv->client_decorated ||
      !priv->resizable ||
      priv->fullscreen ||
      priv->maximized)
    return FALSE;

  supports_edge_constraints = gdk_toplevel_supports_edge_constraints (GDK_TOPLEVEL (priv->surface));
  constraints = constraints_for_edge (edge);

  if (!supports_edge_constraints && priv->tiled)
    return FALSE;

  if (supports_edge_constraints &&
      (priv->edge_constraints & constraints) != constraints)
    return FALSE;

  gtk_widget_get_allocation (GTK_WIDGET (window), &allocation);
  context = _gtk_widget_get_style_context (GTK_WIDGET (window));
  gtk_style_context_save_to_node (context, priv->decoration_node);

  if (priv->use_client_shadow)
    {
      handle_h = MIN (RESIZE_HANDLE_SIZE, allocation.width / 2);
      handle_v = MIN (RESIZE_HANDLE_SIZE, allocation.height / 2);
      get_shadow_width (window, &border);
    }
  else
    {
      handle_h = 0;
      handle_v = 0;
      gtk_style_context_get_padding (context, &border);
    }

  gtk_style_context_restore (context);

  /* Check whether the click falls outside the handle area */
  if (x >= allocation.x + border.left &&
      x < allocation.x + allocation.width - border.right &&
      y >= allocation.y + border.top &&
      y < allocation.y + allocation.height - border.bottom)
    return FALSE;

  /* Check X axis */
  if (x < allocation.x + border.left + handle_h)
    {
      if (edge != GDK_SURFACE_EDGE_NORTH_WEST &&
          edge != GDK_SURFACE_EDGE_WEST &&
          edge != GDK_SURFACE_EDGE_SOUTH_WEST &&
          edge != GDK_SURFACE_EDGE_NORTH &&
          edge != GDK_SURFACE_EDGE_SOUTH)
        return FALSE;

      if ((edge == GDK_SURFACE_EDGE_NORTH ||
           edge == GDK_SURFACE_EDGE_SOUTH) &&
          (priv->edge_constraints & constraints_for_edge (GDK_SURFACE_EDGE_WEST)))
        return FALSE;
    }
  else if (x >= allocation.x + allocation.width - border.right - handle_h)
    {
      if (edge != GDK_SURFACE_EDGE_NORTH_EAST &&
          edge != GDK_SURFACE_EDGE_EAST &&
          edge != GDK_SURFACE_EDGE_SOUTH_EAST &&
          edge != GDK_SURFACE_EDGE_NORTH &&
          edge != GDK_SURFACE_EDGE_SOUTH)
        return FALSE;

      if ((edge == GDK_SURFACE_EDGE_NORTH ||
           edge == GDK_SURFACE_EDGE_SOUTH) &&
          (priv->edge_constraints & constraints_for_edge (GDK_SURFACE_EDGE_EAST)))
        return FALSE;
    }
  else if (edge != GDK_SURFACE_EDGE_NORTH &&
           edge != GDK_SURFACE_EDGE_SOUTH)
    return FALSE;

  /* Check Y axis */
  if (y < allocation.y + border.top + handle_v)
    {
      if (edge != GDK_SURFACE_EDGE_NORTH_WEST &&
          edge != GDK_SURFACE_EDGE_NORTH &&
          edge != GDK_SURFACE_EDGE_NORTH_EAST &&
          edge != GDK_SURFACE_EDGE_EAST &&
          edge != GDK_SURFACE_EDGE_WEST)
        return FALSE;

      if ((edge == GDK_SURFACE_EDGE_EAST ||
           edge == GDK_SURFACE_EDGE_WEST) &&
          (priv->edge_constraints & constraints_for_edge (GDK_SURFACE_EDGE_NORTH)))
        return FALSE;
    }
  else if (y > allocation.y + allocation.height - border.bottom - handle_v)
    {
      if (edge != GDK_SURFACE_EDGE_SOUTH_WEST &&
          edge != GDK_SURFACE_EDGE_SOUTH &&
          edge != GDK_SURFACE_EDGE_SOUTH_EAST &&
          edge != GDK_SURFACE_EDGE_EAST &&
          edge != GDK_SURFACE_EDGE_WEST)
        return FALSE;

      if ((edge == GDK_SURFACE_EDGE_EAST ||
           edge == GDK_SURFACE_EDGE_WEST) &&
          (priv->edge_constraints & constraints_for_edge (GDK_SURFACE_EDGE_SOUTH)))
        return FALSE;
    }
  else if (edge != GDK_SURFACE_EDGE_WEST &&
           edge != GDK_SURFACE_EDGE_EAST)
    return FALSE;

  return TRUE;
}

static void
gtk_window_capture_motion (GtkWidget *widget,
                           gdouble    x,
                           gdouble    y)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gint i;
  const gchar *cursor_names[8] = {
    "nw-resize", "n-resize", "ne-resize",
    "w-resize",               "e-resize",
    "sw-resize", "s-resize", "se-resize"
  };

  g_clear_object (&priv->resize_cursor);

  for (i = 0; i < 8; i++)
    {
      if (edge_under_coordinates (GTK_WINDOW (widget), x, y, i))
        {
          priv->resize_cursor = gdk_cursor_new_from_name (cursor_names[i], NULL);
          break;
        }
    }

  gtk_window_maybe_update_cursor (window, widget, NULL);
}

static void
gtk_window_activate_default_activate (GtkWidget  *widget,
                                      const char *name,
                                      GVariant   *parameter)
{
  gtk_window_real_activate_default (GTK_WINDOW (widget));
}

static void
gtk_window_activate_minimize (GtkWidget  *widget,
                              const char *name,
                              GVariant   *parameter)
{
  gtk_window_minimize (GTK_WINDOW (widget));
}

static void
gtk_window_activate_toggle_maximized (GtkWidget  *widget,
                                      const char *name,
                                      GVariant   *parameter)
{
  _gtk_window_toggle_maximized (GTK_WINDOW (widget));
}

static void
gtk_window_activate_close (GtkWidget  *widget,
                           const char *name,
                           GVariant   *parameter)
{
  gtk_window_close (GTK_WINDOW (widget));
}

static gboolean
gtk_window_accept_rootwindow_drop (GtkDropTargetAsync *self,
                                   GdkDrop            *drop,
                                   double              x,
                                   double              y,
                                   gpointer            unused)
{
  gdk_drop_finish (drop, GDK_ACTION_MOVE);

  return TRUE;
}

static void
gtk_window_init (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget;
  GtkCssNode *widget_node;
  GdkSeat *seat;
  GtkEventController *controller;
  GtkDropTargetAsync *target;
  GtkShortcut *shortcut;

  widget = GTK_WIDGET (window);

  priv->title = NULL;
  priv->geometry_info = NULL;
  priv->focus_widget = NULL;
  priv->default_widget = NULL;
  priv->configure_request_count = 0;
  priv->resizable = TRUE;
  priv->configure_notify_received = FALSE;
  priv->need_default_size = TRUE;
  priv->modal = FALSE;
  priv->gravity = GDK_GRAVITY_NORTH_WEST;
  priv->decorated = TRUE;
  priv->display = gdk_display_get_default ();

  priv->state = GDK_SURFACE_STATE_WITHDRAWN;

  priv->deletable = TRUE;
  priv->startup_id = NULL;
  priv->initial_timestamp = GDK_CURRENT_TIME;
  priv->mnemonics_visible = FALSE;
  priv->focus_visible = TRUE;
  priv->initial_fullscreen_monitor = NULL;

  g_object_ref_sink (window);

#ifdef GDK_WINDOWING_X11
  g_signal_connect (gtk_settings_get_for_display (priv->display),
                    "notify::gtk-application-prefer-dark-theme",
                    G_CALLBACK (gtk_window_on_theme_variant_changed), window);
#endif

  widget_node = gtk_widget_get_css_node (GTK_WIDGET (window));
  priv->decoration_node = gtk_css_node_new ();
  gtk_css_node_set_name (priv->decoration_node, g_quark_from_static_string ("decoration"));
  gtk_css_node_set_parent (priv->decoration_node, widget_node);
  gtk_css_node_set_state (priv->decoration_node, gtk_css_node_get_state (widget_node));
  g_signal_connect_object (priv->decoration_node, "style-changed", G_CALLBACK (node_style_changed_cb), window, 0);
  g_object_unref (priv->decoration_node);

  gtk_css_node_add_class (widget_node, g_quark_from_static_string (GTK_STYLE_CLASS_BACKGROUND));

  priv->scale = gtk_widget_get_scale_factor (widget);

  target = gtk_drop_target_async_new (gdk_content_formats_new ((const char*[1]) { "application/x-rootwindow-drop" }, 1),
                                      GDK_ACTION_MOVE);
  g_signal_connect (target, "drop", G_CALLBACK (gtk_window_accept_rootwindow_drop), NULL);
  gtk_widget_add_controller (GTK_WIDGET (window), GTK_EVENT_CONTROLLER (target));

  seat = gdk_display_get_default_seat (gtk_widget_get_display (widget));
  g_signal_connect (seat, "device-removed",
                    G_CALLBACK (device_removed_cb), window);

  controller = gtk_event_controller_motion_new ();
  gtk_event_controller_set_propagation_phase (controller,
                                              GTK_PHASE_CAPTURE);
  g_signal_connect_swapped (controller, "motion",
                            G_CALLBACK (gtk_window_capture_motion), window);
  gtk_widget_add_controller (widget, controller);

  priv->key_controller = gtk_event_controller_key_new ();
  gtk_event_controller_set_propagation_phase (priv->key_controller, GTK_PHASE_CAPTURE);
  g_signal_connect_swapped (priv->key_controller, "key-pressed",
                            G_CALLBACK (gtk_window_key_pressed), window);
  g_signal_connect_swapped (priv->key_controller, "key-released",
                            G_CALLBACK (gtk_window_key_released), window);
  gtk_widget_add_controller (widget, priv->key_controller);

  controller = gtk_event_controller_legacy_new ();
  gtk_event_controller_set_name (controller, "gtk-window-toplevel-focus");
  g_signal_connect_swapped (controller, "event",
                            G_CALLBACK (gtk_window_handle_focus), window);
  gtk_widget_add_controller (widget, controller);

  /* Shared constraint solver */
  priv->constraint_solver = gtk_constraint_solver_new ();

  controller = gtk_shortcut_controller_new ();
  gtk_event_controller_set_propagation_phase (controller, GTK_PHASE_CAPTURE);

  shortcut = gtk_shortcut_new (gtk_keyval_trigger_new (MENU_BAR_ACCEL, 0),
                               gtk_callback_action_new (gtk_window_activate_menubar, NULL, NULL));
  gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller), shortcut);
  gtk_event_controller_set_name (controller, "gtk-window-menubar-accel");
  gtk_widget_add_controller (widget, controller);
}

static void
gtk_window_constructed (GObject *object)
{
  GtkWindow *window = GTK_WINDOW (object);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  G_OBJECT_CLASS (gtk_window_parent_class)->constructed (object);

  priv->click_gesture = gtk_gesture_click_new ();
  gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->click_gesture), 0);
  gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->click_gesture),
                                              GTK_PHASE_BUBBLE);
  g_signal_connect (priv->click_gesture, "pressed",
                    G_CALLBACK (click_gesture_pressed_cb), object);
  gtk_widget_add_controller (GTK_WIDGET (object), GTK_EVENT_CONTROLLER (priv->click_gesture));

  g_list_store_append (toplevel_list, window);
  g_object_unref (window);
}

static void
gtk_window_set_property (GObject      *object,
			 guint         prop_id,
			 const GValue *value,
			 GParamSpec   *pspec)
{
  GtkWindow  *window = GTK_WINDOW (object);

  switch (prop_id)
    {
    case PROP_TITLE:
      gtk_window_set_title (window, g_value_get_string (value));
      break;
    case PROP_STARTUP_ID:
      gtk_window_set_startup_id (window, g_value_get_string (value));
      break;
    case PROP_RESIZABLE:
      gtk_window_set_resizable (window, g_value_get_boolean (value));
      break;
    case PROP_MODAL:
      gtk_window_set_modal (window, g_value_get_boolean (value));
      break;
    case PROP_DEFAULT_WIDTH:
      gtk_window_set_default_size_internal (window,
                                            TRUE, g_value_get_int (value),
                                            FALSE, -1);
      break;
    case PROP_DEFAULT_HEIGHT:
      gtk_window_set_default_size_internal (window,
                                            FALSE, -1,
                                            TRUE, g_value_get_int (value));
      break;
    case PROP_DESTROY_WITH_PARENT:
      gtk_window_set_destroy_with_parent (window, g_value_get_boolean (value));
      break;
    case PROP_HIDE_ON_CLOSE:
      gtk_window_set_hide_on_close (window, g_value_get_boolean (value));
      break;
    case PROP_ICON_NAME:
      gtk_window_set_icon_name (window, g_value_get_string (value));
      break;
    case PROP_DISPLAY:
      gtk_window_set_display (window, g_value_get_object (value));
      break;
    case PROP_DECORATED:
      gtk_window_set_decorated (window, g_value_get_boolean (value));
      break;
    case PROP_DELETABLE:
      gtk_window_set_deletable (window, g_value_get_boolean (value));
      break;
    case PROP_TRANSIENT_FOR:
      gtk_window_set_transient_for (window, g_value_get_object (value));
      break;
    case PROP_APPLICATION:
      gtk_window_set_application (window, g_value_get_object (value));
      break;
    case PROP_DEFAULT_WIDGET:
      gtk_window_set_default_widget (window, g_value_get_object (value));
      break;
    case PROP_MNEMONICS_VISIBLE:
      gtk_window_set_mnemonics_visible (window, g_value_get_boolean (value));
      break;
    case PROP_FOCUS_VISIBLE:
      gtk_window_set_focus_visible (window, g_value_get_boolean (value));
      break;
    case PROP_FOCUS_WIDGET:
      gtk_window_set_focus (window, g_value_get_object (value));
      break;
    case PROP_CHILD:
      gtk_window_set_child (window, g_value_get_object (value));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
gtk_window_get_property (GObject      *object,
			 guint         prop_id,
			 GValue       *value,
			 GParamSpec   *pspec)
{
  GtkWindow  *window = GTK_WINDOW (object);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  switch (prop_id)
    {
      GtkWindowGeometryInfo *info;
    case PROP_TITLE:
      g_value_set_string (value, priv->title);
      break;
    case PROP_RESIZABLE:
      g_value_set_boolean (value, priv->resizable);
      break;
    case PROP_MODAL:
      g_value_set_boolean (value, priv->modal);
      break;
    case PROP_DEFAULT_WIDTH:
      info = gtk_window_get_geometry_info (window, FALSE);
      if (!info)
	g_value_set_int (value, -1);
      else
	g_value_set_int (value, info->default_width);
      break;
    case PROP_DEFAULT_HEIGHT:
      info = gtk_window_get_geometry_info (window, FALSE);
      if (!info)
	g_value_set_int (value, -1);
      else
	g_value_set_int (value, info->default_height);
      break;
    case PROP_DESTROY_WITH_PARENT:
      g_value_set_boolean (value, priv->destroy_with_parent);
      break;
    case PROP_HIDE_ON_CLOSE:
      g_value_set_boolean (value, priv->hide_on_close);
      break;
    case PROP_ICON_NAME:
      g_value_set_string (value, gtk_window_get_icon_name (window));
      break;
    case PROP_DISPLAY:
      g_value_set_object (value, priv->display);
      break;
    case PROP_IS_ACTIVE:
      g_value_set_boolean (value, priv->is_active);
      break;
    case PROP_DECORATED:
      g_value_set_boolean (value, gtk_window_get_decorated (window));
      break;
    case PROP_DELETABLE:
      g_value_set_boolean (value, gtk_window_get_deletable (window));
      break;
    case PROP_TRANSIENT_FOR:
      g_value_set_object (value, gtk_window_get_transient_for (window));
      break;
    case PROP_APPLICATION:
      g_value_set_object (value, gtk_window_get_application (window));
      break;
    case PROP_DEFAULT_WIDGET:
      g_value_set_object (value, gtk_window_get_default_widget (window));
      break;
    case PROP_MNEMONICS_VISIBLE:
      g_value_set_boolean (value, priv->mnemonics_visible);
      break;
    case PROP_FOCUS_VISIBLE:
      g_value_set_boolean (value, priv->focus_visible);
      break;
    case PROP_IS_MAXIMIZED:
      g_value_set_boolean (value, gtk_window_is_maximized (window));
      break;
    case PROP_FOCUS_WIDGET:
      g_value_set_object (value, gtk_window_get_focus (window));
      break;
    case PROP_CHILD:
      g_value_set_object (value, gtk_window_get_child (window));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
gtk_window_buildable_interface_init (GtkBuildableIface *iface)
{
  parent_buildable_iface = g_type_interface_peek_parent (iface);
  iface->set_buildable_property = gtk_window_buildable_set_buildable_property;
  iface->add_child = gtk_window_buildable_add_child;
}

static void
gtk_window_buildable_add_child (GtkBuildable *buildable,
                                GtkBuilder   *builder,
                                GObject      *child,
                                const gchar  *type)
{
  if (type && strcmp (type, "titlebar") == 0)
    gtk_window_set_titlebar (GTK_WINDOW (buildable), GTK_WIDGET (child));
  else if (GTK_IS_WIDGET (child))
    gtk_window_set_child (GTK_WINDOW (buildable), GTK_WIDGET (child));
  else
    parent_buildable_iface->add_child (buildable, builder, child, type);
}

static void
gtk_window_buildable_set_buildable_property (GtkBuildable *buildable,
                                             GtkBuilder   *builder,
                                             const gchar  *name,
                                             const GValue *value)
{
  GtkWindow *window = GTK_WINDOW (buildable);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (strcmp (name, "visible") == 0 && g_value_get_boolean (value))
    priv->builder_visible = TRUE;
  else if (parent_buildable_iface->set_buildable_property)
    parent_buildable_iface->set_buildable_property (buildable, builder, name, value);
  else
    g_object_set_property (G_OBJECT (buildable), name, value);
}

static void
gtk_window_shortcut_manager_interface_init (GtkShortcutManagerInterface *iface)
{
}

static GdkDisplay *
gtk_window_root_get_display (GtkRoot *root)
{
  GtkWindow *window = GTK_WINDOW (root);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  return priv->display;
}

static GdkSurface *
gtk_window_native_get_surface (GtkNative *native)
{
  GtkWindow *self = GTK_WINDOW (native);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (self);

  return priv->surface;
}

static GskRenderer *
gtk_window_native_get_renderer (GtkNative *native)
{
  GtkWindow *self = GTK_WINDOW (native);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (self);

  return priv->renderer;
}

static GtkConstraintSolver *
gtk_window_root_get_constraint_solver (GtkRoot *root)
{
  GtkWindow *self = GTK_WINDOW (root);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (self);

  return priv->constraint_solver;
}

static GtkWidget *
gtk_window_root_get_focus (GtkRoot *root)
{
  GtkWindow *self = GTK_WINDOW (root);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (self);

  return priv->focus_widget;
}

static void synthesize_focus_change_events (GtkWindow *window,
                                            GtkWidget *old_focus,
                                            GtkWidget *new_focus);

static void
gtk_window_root_set_focus (GtkRoot   *root,
                           GtkWidget *focus)
{
  GtkWindow *self = GTK_WINDOW (root);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (self);
  GtkWidget *old_focus = NULL;

  if (focus && !gtk_widget_is_sensitive (focus))
    return;

  if (focus == priv->focus_widget)
    return;

  if (priv->focus_widget)
    old_focus = g_object_ref (priv->focus_widget);
  g_set_object (&priv->focus_widget, NULL);

  if (old_focus)
    gtk_widget_set_has_focus (old_focus, FALSE);

  synthesize_focus_change_events (self, old_focus, focus);

  if (focus)
    gtk_widget_set_has_focus (focus, TRUE);

  g_set_object (&priv->focus_widget, focus);

  g_clear_object (&old_focus);

  g_object_notify (G_OBJECT (self), "focus-widget");
}

static void
gtk_window_native_get_surface_transform (GtkNative *native,
                                         int       *x,
                                         int       *y)
{
  const graphene_rect_t *margin_rect;
  GtkCssBoxes boxes;

  gtk_css_boxes_init (&boxes, GTK_WIDGET (native));
  margin_rect = gtk_css_boxes_get_margin_rect (&boxes);

  *x = - margin_rect->origin.x;
  *y = - margin_rect->origin.y;
}

static void
gtk_window_native_check_resize (GtkNative *native)
{
  gtk_window_check_resize (GTK_WINDOW (native));
}

static void
gtk_window_root_interface_init (GtkRootInterface *iface)
{
  iface->get_display = gtk_window_root_get_display;
  iface->get_constraint_solver = gtk_window_root_get_constraint_solver;
  iface->get_focus = gtk_window_root_get_focus;
  iface->set_focus = gtk_window_root_set_focus;
}

static void
gtk_window_native_interface_init (GtkNativeInterface *iface)
{
  iface->get_surface = gtk_window_native_get_surface;
  iface->get_renderer = gtk_window_native_get_renderer;
  iface->get_surface_transform = gtk_window_native_get_surface_transform;
  iface->check_resize = gtk_window_native_check_resize;
}

/**
 * gtk_window_new:
 * 
 * Creates a new #GtkWindow, which is a toplevel window that can
 * contain other widgets.
 *
 * To get an undecorated window (no window borders), use
 * gtk_window_set_decorated().
 *
 * All top-level windows created by gtk_window_new() are stored in
 * an internal top-level window list.  This list can be obtained from
 * gtk_window_list_toplevels().  Due to Gtk+ keeping a reference to
 * the window internally, gtk_window_new() does not return a reference
 * to the caller.
 *
 * To delete a #GtkWindow, call gtk_window_destroy().
 * 
 * Returns: a new #GtkWindow.
 **/
GtkWidget*
gtk_window_new (void)
{
  return g_object_new (GTK_TYPE_WINDOW, NULL);
}

/**
 * gtk_window_set_title:
 * @window: a #GtkWindow
 * @title: title of the window
 * 
 * Sets the title of the #GtkWindow. The title of a window will be
 * displayed in its title bar; on the X Window System, the title bar
 * is rendered by the [window manager][gtk-X11-arch],
 * so exactly how the title appears to users may vary
 * according to a user’s exact configuration. The title should help a
 * user distinguish this window from other windows they may have
 * open. A good title might include the application name and current
 * document filename, for example.
 * 
 **/
void
gtk_window_set_title (GtkWindow   *window,
                      const gchar *title)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  char *new_title;

  g_return_if_fail (GTK_IS_WINDOW (window));

  new_title = g_strdup (title);
  g_free (priv->title);
  priv->title = new_title;

  if (_gtk_widget_get_realized (GTK_WIDGET (window)))
    gdk_toplevel_set_title (GDK_TOPLEVEL (priv->surface), new_title != NULL ? new_title : "");

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_TITLE]);
}

/**
 * gtk_window_get_title:
 * @window: a #GtkWindow
 *
 * Retrieves the title of the window. See gtk_window_set_title().
 *
 * Returns: (nullable): the title of the window, or %NULL if none has
 * been set explicitly. The returned string is owned by the widget
 * and must not be modified or freed.
 **/
const gchar *
gtk_window_get_title (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), NULL);

  return priv->title;
}

/**
 * gtk_window_set_startup_id:
 * @window: a #GtkWindow
 * @startup_id: a string with startup-notification identifier
 *
 * Startup notification identifiers are used by desktop environment to 
 * track application startup, to provide user feedback and other 
 * features. This function changes the corresponding property on the
 * underlying GdkSurface. Normally, startup identifier is managed 
 * automatically and you should only use this function in special cases
 * like transferring focus from other processes. You should use this
 * function before calling gtk_window_present() or any equivalent
 * function generating a window map event.
 *
 * This function is only useful on X11, not with other GTK+ targets.
 **/
void
gtk_window_set_startup_id (GtkWindow   *window,
                           const gchar *startup_id)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget;

  g_return_if_fail (GTK_IS_WINDOW (window));

  widget = GTK_WIDGET (window);

  g_free (priv->startup_id);
  priv->startup_id = g_strdup (startup_id);

  if (_gtk_widget_get_realized (widget))
    {
      guint32 timestamp = extract_time_from_startup_id (priv->startup_id);

#ifdef GDK_WINDOWING_X11
      if (timestamp != GDK_CURRENT_TIME && GDK_IS_X11_SURFACE (priv->surface))
	gdk_x11_surface_set_user_time (priv->surface, timestamp);
#endif

      /* Here we differentiate real and "fake" startup notification IDs,
       * constructed on purpose just to pass interaction timestamp
       */
      if (startup_id_is_fake (priv->startup_id))
	gtk_window_present_with_time (window, timestamp);
      else
        {
          gdk_toplevel_set_startup_id (GDK_TOPLEVEL (priv->surface), priv->startup_id);

          /* If window is mapped, terminate the startup-notification too */
          if (_gtk_widget_get_mapped (widget) && !disable_startup_notification)
            gdk_display_notify_startup_complete (gtk_widget_get_display (widget), priv->startup_id);
        }
    }

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_STARTUP_ID]);
}

/**
 * gtk_window_set_default_widget:
 * @window: a #GtkWindow
 * @default_widget: (allow-none): widget to be the default, or %NULL
 *     to unset the default widget for the toplevel
 *
 * The default widget is the widget that’s activated when the user
 * presses Enter in a dialog (for example). This function sets or
 * unsets the default widget for a #GtkWindow.
 */
void
gtk_window_set_default_widget (GtkWindow *window,
                               GtkWidget *default_widget)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  if (priv->default_widget != default_widget)
    {
      GtkWidget *old_default_widget = NULL;

      if (default_widget)
	g_object_ref (default_widget);

      if (priv->default_widget)
	{
          old_default_widget = priv->default_widget;

          if (priv->focus_widget != priv->default_widget ||
              !gtk_widget_get_receives_default (priv->default_widget))
            _gtk_widget_set_has_default (priv->default_widget, FALSE);

          gtk_widget_queue_draw (priv->default_widget);
	}

      priv->default_widget = default_widget;

      if (priv->default_widget)
	{
          if (priv->focus_widget == NULL ||
              !gtk_widget_get_receives_default (priv->focus_widget))
            _gtk_widget_set_has_default (priv->default_widget, TRUE);

          gtk_widget_queue_draw (priv->default_widget);
	}

      if (old_default_widget)
	g_object_notify (G_OBJECT (old_default_widget), "has-default");

      if (default_widget)
	{
	  g_object_notify (G_OBJECT (default_widget), "has-default");
	  g_object_unref (default_widget);
	}

      g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_DEFAULT_WIDGET]);
    }
}

/**
 * gtk_window_get_default_widget:
 * @window: a #GtkWindow
 *
 * Returns the default widget for @window. See
 * gtk_window_set_default() for more details.
 *
 * Returns: (nullable) (transfer none): the default widget, or %NULL
 * if there is none.
 **/
GtkWidget *
gtk_window_get_default_widget (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), NULL);

  return priv->default_widget;
}

static gboolean
handle_keys_changed (gpointer data)
{
  GtkWindow *window = GTK_WINDOW (data);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->keys_changed_handler)
    {
      g_source_remove (priv->keys_changed_handler);
      priv->keys_changed_handler = 0;
    }

  g_signal_emit (window, window_signals[KEYS_CHANGED], 0);
  
  return FALSE;
}

void
_gtk_window_notify_keys_changed (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (!priv->keys_changed_handler)
    {
      priv->keys_changed_handler = g_idle_add (handle_keys_changed, window);
      g_source_set_name_by_id (priv->keys_changed_handler, "[gtk] handle_keys_changed");
    }
}

/**
 * gtk_window_get_focus:
 * @window: a #GtkWindow
 * 
 * Retrieves the current focused widget within the window.
 * Note that this is the widget that would have the focus
 * if the toplevel window focused; if the toplevel window
 * is not focused then  `gtk_widget_has_focus (widget)` will
 * not be %TRUE for the widget.
 *
 * Returns: (nullable) (transfer none): the currently focused widget,
 * or %NULL if there is none.
 **/
GtkWidget *
gtk_window_get_focus (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), NULL);

  return priv->focus_widget;
}

static void
gtk_window_real_activate_default (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->default_widget && gtk_widget_is_sensitive (priv->default_widget) &&
      (!priv->focus_widget || !gtk_widget_get_receives_default (priv->focus_widget)))
    gtk_widget_activate (priv->default_widget);
  else if (priv->focus_widget && gtk_widget_is_sensitive (priv->focus_widget))
    gtk_widget_activate (priv->focus_widget);
}

/**
 * gtk_window_set_modal:
 * @window: a #GtkWindow
 * @modal: whether the window is modal
 * 
 * Sets a window modal or non-modal. Modal windows prevent interaction
 * with other windows in the same application. To keep modal dialogs
 * on top of main application windows, use
 * gtk_window_set_transient_for() to make the dialog transient for the
 * parent; most [window managers][gtk-X11-arch]
 * will then disallow lowering the dialog below the parent.
 * 
 * 
 **/
void
gtk_window_set_modal (GtkWindow *window,
		      gboolean   modal)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget;

  g_return_if_fail (GTK_IS_WINDOW (window));

  modal = modal != FALSE;
  if (priv->modal == modal)
    return;

  priv->modal = modal;
  widget = GTK_WIDGET (window);
  
  if (_gtk_widget_get_realized (widget))
    gdk_toplevel_set_modal (GDK_TOPLEVEL (priv->surface), modal);

  if (gtk_widget_get_visible (widget))
    {
      if (priv->modal)
	gtk_grab_add (widget);
      else
	gtk_grab_remove (widget);
    }

  update_window_actions (window);

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_MODAL]);
}

/**
 * gtk_window_get_modal:
 * @window: a #GtkWindow
 * 
 * Returns whether the window is modal. See gtk_window_set_modal().
 *
 * Returns: %TRUE if the window is set to be modal and
 *               establishes a grab when shown
 **/
gboolean
gtk_window_get_modal (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->modal;
}

/**
 * gtk_window_get_toplevels:
 *
 * Returns a list of all existing toplevel windows.
 *
 * If you want to iterate through the list and perform actions involving
 * callbacks that might destroy the widgets or add new ones, be aware that
 * the list of toplevels will change and emit the "items-changed" signal.
 *
 * Returns: (transfer none) (attributes element-type=GtkWindow): the list
 *   of toplevel widgets
 */
GListModel *
gtk_window_get_toplevels (void)
{
  if (toplevel_list == NULL)
    toplevel_list = g_list_store_new (GTK_TYPE_WIDGET);

  return G_LIST_MODEL (toplevel_list);
}

/**
 * gtk_window_list_toplevels:
 * 
 * Returns a list of all existing toplevel windows. The widgets
 * in the list are not individually referenced. If you want
 * to iterate through the list and perform actions involving
 * callbacks that might destroy the widgets, you must call
 * `g_list_foreach (result, (GFunc)g_object_ref, NULL)` first, and
 * then unref all the widgets afterwards.
 *
 * Returns: (element-type GtkWidget) (transfer container): list of toplevel widgets
 **/
GList*
gtk_window_list_toplevels (void)
{
  GListModel *toplevels;
  GList *list = NULL;
  guint i;

  toplevels = gtk_window_get_toplevels ();

  for (i = 0; i < g_list_model_get_n_items (toplevels); i++)
    {
      gpointer item = g_list_model_get_item (toplevels, i);
      list = g_list_prepend (list, item);
      g_object_unref (item);
    }

  return list;
}

static void
gtk_window_dispose (GObject *object)
{
  GtkWindow *window = GTK_WINDOW (object);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  gtk_window_release_application (window);

  if (priv->transient_parent)
    gtk_window_set_transient_for (window, NULL);

  if (priv->group)
    gtk_window_group_remove_window (priv->group, window);

  g_list_free_full (priv->foci, (GDestroyNotify) gtk_pointer_focus_unref);
  priv->foci = NULL;

  g_clear_pointer (&priv->layout, gdk_toplevel_layout_unref);
  gtk_window_set_focus (window, NULL);
  gtk_window_set_default_widget (window, NULL);

  g_clear_pointer (&priv->child, gtk_widget_unparent);
  unset_titlebar (window);

  G_OBJECT_CLASS (gtk_window_parent_class)->dispose (object);
}

static void
gtk_window_transient_parent_destroyed (GtkWindow *parent,
                                       GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (GTK_WINDOW (window));

  if (priv->destroy_with_parent)
    gtk_window_destroy (window);
  else
    priv->transient_parent = NULL;
}

static void
gtk_window_transient_parent_realized (GtkWidget *parent,
                                      GtkWidget *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (GTK_WINDOW (window));
  GtkWindowPrivate *parent_priv = gtk_window_get_instance_private (GTK_WINDOW (parent));
  if (_gtk_widget_get_realized (window))
    gdk_toplevel_set_transient_for (GDK_TOPLEVEL (priv->surface), parent_priv->surface);
}

static void
gtk_window_transient_parent_unrealized (GtkWidget *parent,
                                        GtkWidget *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (GTK_WINDOW (window));
  if (_gtk_widget_get_realized (window))
    gdk_toplevel_set_transient_for (GDK_TOPLEVEL (priv->surface), NULL);
}

static void
gtk_window_transient_parent_display_changed (GtkWindow  *parent,
                                             GParamSpec *pspec,
                                             GtkWindow  *window)
{
  GtkWindowPrivate *parent_priv = gtk_window_get_instance_private (parent);

  gtk_window_set_display (window, parent_priv->display);
}

static void
gtk_window_unset_transient_for (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->transient_parent)
    {
      g_signal_handlers_disconnect_by_func (priv->transient_parent,
                                            gtk_window_transient_parent_realized,
                                            window);
      g_signal_handlers_disconnect_by_func (priv->transient_parent,
                                            gtk_window_transient_parent_unrealized,
                                            window);
      g_signal_handlers_disconnect_by_func (priv->transient_parent,
                                            gtk_window_transient_parent_display_changed,
                                            window);
      g_signal_handlers_disconnect_by_func (priv->transient_parent,
                                            gtk_window_transient_parent_destroyed,
                                            window);

      priv->transient_parent = NULL;

      if (priv->transient_parent_group)
        {
          priv->transient_parent_group = FALSE;
          gtk_window_group_remove_window (priv->group, window);
        }
    }
}

/**
 * gtk_window_set_transient_for:
 * @window: a #GtkWindow
 * @parent: (allow-none): parent window, or %NULL
 *
 * Dialog windows should be set transient for the main application
 * window they were spawned from. This allows
 * [window managers][gtk-X11-arch] to e.g. keep the
 * dialog on top of the main window, or center the dialog over the
 * main window. gtk_dialog_new_with_buttons() and other convenience
 * functions in GTK+ will sometimes call
 * gtk_window_set_transient_for() on your behalf.
 *
 * Passing %NULL for @parent unsets the current transient window.
 *
 * On Windows, this function puts the child window on top of the parent,
 * much as the window manager would have done on X.
 */
void
gtk_window_set_transient_for (GtkWindow *window,
                              GtkWindow *parent)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));
  g_return_if_fail (parent == NULL || GTK_IS_WINDOW (parent));
  g_return_if_fail (window != parent);

  if (priv->transient_parent)
    {
      if (_gtk_widget_get_realized (GTK_WIDGET (window)) &&
          _gtk_widget_get_realized (GTK_WIDGET (priv->transient_parent)) &&
          (!parent || !_gtk_widget_get_realized (GTK_WIDGET (parent))))
        gtk_window_transient_parent_unrealized (GTK_WIDGET (priv->transient_parent),
                                                GTK_WIDGET (window));
      gtk_window_unset_transient_for (window);
    }

  priv->transient_parent = parent;

  if (parent)
    {
      GtkWindowPrivate *parent_priv = gtk_window_get_instance_private (parent);
      g_signal_connect (parent, "realize",
                        G_CALLBACK (gtk_window_transient_parent_realized), window);
      g_signal_connect (parent, "unrealize",
                        G_CALLBACK (gtk_window_transient_parent_unrealized), window);
      g_signal_connect (parent, "notify::display",
                        G_CALLBACK (gtk_window_transient_parent_display_changed), window);
      g_signal_connect (parent, "destroy",
                        G_CALLBACK (gtk_window_transient_parent_destroyed), window);

      gtk_window_set_display (window, parent_priv->display);


      if (_gtk_widget_get_realized (GTK_WIDGET (window)) &&
          _gtk_widget_get_realized (GTK_WIDGET (parent)))
        gtk_window_transient_parent_realized (GTK_WIDGET (parent), GTK_WIDGET (window));

      if (parent_priv->group)
        {
          gtk_window_group_add_window (parent_priv->group, window);
          priv->transient_parent_group = TRUE;
        }
    }

  update_window_actions (window);

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_TRANSIENT_FOR]);
}

/**
 * gtk_window_get_transient_for:
 * @window: a #GtkWindow
 *
 * Fetches the transient parent for this window. See
 * gtk_window_set_transient_for().
 *
 * Returns: (nullable) (transfer none): the transient parent for this
 * window, or %NULL if no transient parent has been set.
 **/
GtkWindow *
gtk_window_get_transient_for (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), NULL);

  return priv->transient_parent;
}

/**
 * gtk_window_get_application:
 * @window: a #GtkWindow
 *
 * Gets the #GtkApplication associated with the window (if any).
 *
 * Returns: (nullable) (transfer none): a #GtkApplication, or %NULL
 **/
GtkApplication *
gtk_window_get_application (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), NULL);

  return priv->application;
}

static void
gtk_window_release_application (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->application)
    {
      GtkApplication *application;

      /* steal reference into temp variable */
      application = priv->application;
      priv->application = NULL;
      gtk_widget_remove_controller (GTK_WIDGET (window),
                                    priv->application_shortcut_controller);
      priv->application_shortcut_controller = NULL;

      gtk_application_remove_window (application, window);
      g_object_unref (application);
    }
}

/**
 * gtk_window_set_application:
 * @window: a #GtkWindow
 * @application: (allow-none): a #GtkApplication, or %NULL to unset
 *
 * Sets or unsets the #GtkApplication associated with the window.
 *
 * The application will be kept alive for at least as long as it has any windows
 * associated with it (see g_application_hold() for a way to keep it alive
 * without windows).
 *
 * Normally, the connection between the application and the window will remain
 * until the window is destroyed, but you can explicitly remove it by setting
 * the @application to %NULL.
 *
 * This is equivalent to calling gtk_application_remove_window() and/or
 * gtk_application_add_window() on the old/new applications as relevant.
 **/
void
gtk_window_set_application (GtkWindow      *window,
                            GtkApplication *application)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  if (priv->application != application)
    {
      gtk_window_release_application (window);

      priv->application = application;

      if (priv->application != NULL)
        {
          GtkApplicationAccels *app_accels;

          g_object_ref (priv->application);

          gtk_application_add_window (priv->application, window);

          app_accels = gtk_application_get_application_accels (priv->application);
          priv->application_shortcut_controller = gtk_shortcut_controller_new_for_model (gtk_application_accels_get_shortcuts (app_accels));
          gtk_event_controller_set_name (priv->application_shortcut_controller, "gtk-application-shortcuts");
          gtk_event_controller_set_propagation_phase (priv->application_shortcut_controller, GTK_PHASE_CAPTURE);
          gtk_shortcut_controller_set_scope (GTK_SHORTCUT_CONTROLLER (priv->application_shortcut_controller), GTK_SHORTCUT_SCOPE_GLOBAL);
          gtk_widget_add_controller (GTK_WIDGET (window), priv->application_shortcut_controller);
        }

      _gtk_widget_update_parent_muxer (GTK_WIDGET (window));

      _gtk_window_notify_keys_changed (window);

      g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_APPLICATION]);
    }
}

/**
 * gtk_window_set_destroy_with_parent:
 * @window: a #GtkWindow
 * @setting: whether to destroy @window with its transient parent
 * 
 * If @setting is %TRUE, then destroying the transient parent of @window
 * will also destroy @window itself. This is useful for dialogs that
 * shouldn’t persist beyond the lifetime of the main window they're
 * associated with, for example.
 **/
void
gtk_window_set_destroy_with_parent (GtkWindow *window,
                                    gboolean   setting)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  if (priv->destroy_with_parent == (setting != FALSE))
    return;

  priv->destroy_with_parent = setting;

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_DESTROY_WITH_PARENT]);
}

/**
 * gtk_window_get_destroy_with_parent:
 * @window: a #GtkWindow
 * 
 * Returns whether the window will be destroyed with its transient parent. See
 * gtk_window_set_destroy_with_parent ().
 *
 * Returns: %TRUE if the window will be destroyed with its transient parent.
 **/
gboolean
gtk_window_get_destroy_with_parent (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->destroy_with_parent;
}

/**
 * gtk_window_set_hide_on_close:
 * @window: a #GtkWindow
 * @setting: whether to hide the window when it is closed
 *
 * If @setting is %TRUE, then clicking the close button on the window
 * will not destroy it, but only hide it.
 */
void
gtk_window_set_hide_on_close (GtkWindow *window,
                              gboolean   setting)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  if (priv->hide_on_close == setting)
    return;

  priv->hide_on_close = setting;

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_HIDE_ON_CLOSE]);
}

/**
 * gtk_window_get_hide_on_close:
 * @window: a #GtkWindow
 *
 * Returns whether the window will be hidden when the close button is clicked.
 *
 * Returns: %TRUE if the window will be hidden
 */
gboolean
gtk_window_get_hide_on_close (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->hide_on_close;
}

static GtkWindowGeometryInfo*
gtk_window_get_geometry_info (GtkWindow *window,
			      gboolean   create)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWindowGeometryInfo *info;

  info = priv->geometry_info;
  if (!info && create)
    {
      info = g_new0 (GtkWindowGeometryInfo, 1);

      info->default_width = -1;
      info->default_height = -1;
      info->resize_width = -1;
      info->resize_height = -1;
      info->last.configure_request.x = 0;
      info->last.configure_request.y = 0;
      info->last.configure_request.width = -1;
      info->last.configure_request.height = -1;
      priv->geometry_info = info;
    }

  return info;
}

static void
unset_titlebar (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->title_box != NULL)
    {
      gtk_widget_unparent (priv->title_box);
      priv->title_box = NULL;
      priv->titlebar = NULL;
    }
}

static gboolean
gtk_window_supports_client_shadow (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GdkDisplay *display;

  display = priv->display;

  if (!gdk_display_is_rgba (display))
    return FALSE;

  if (!gdk_display_is_composited (display))
    return FALSE;

#ifdef GDK_WINDOWING_X11
  if (GDK_IS_X11_DISPLAY (display))
    {
      if (!gdk_x11_screen_supports_net_wm_hint (gdk_x11_display_get_screen (display),
                                                g_intern_static_string ("_GTK_FRAME_EXTENTS")))
        return FALSE;
    }
#endif

  return TRUE;
}

static void
gtk_window_enable_csd (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget = GTK_WIDGET (window);

  /* We need a visual with alpha for client shadows */
  if (priv->use_client_shadow)
    gtk_widget_add_css_class (widget, GTK_STYLE_CLASS_CSD);
  else
    gtk_widget_add_css_class (widget, "solid-csd");

  priv->client_decorated = TRUE;
}

/**
 * gtk_window_set_titlebar:
 * @window: a #GtkWindow
 * @titlebar: (allow-none): the widget to use as titlebar
 *
 * Sets a custom titlebar for @window.
 *
 * A typical widget used here is #GtkHeaderBar, as it provides various features
 * expected of a titlebar while allowing the addition of child widgets to it.
 *
 * If you set a custom titlebar, GTK+ will do its best to convince
 * the window manager not to put its own titlebar on the window.
 * Depending on the system, this function may not work for a window
 * that is already visible, so you set the titlebar before calling
 * gtk_widget_show().
 */
void
gtk_window_set_titlebar (GtkWindow *window,
                         GtkWidget *titlebar)
{
  GtkWidget *widget = GTK_WIDGET (window);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gboolean was_mapped;

  g_return_if_fail (GTK_IS_WINDOW (window));

  if ((!priv->title_box && titlebar) || (priv->title_box && !titlebar))
    {
      was_mapped = _gtk_widget_get_mapped (widget);
      if (_gtk_widget_get_realized (widget))
        {
          g_warning ("gtk_window_set_titlebar() called on a realized window");
          gtk_widget_unrealize (widget);
        }
    }
  else
    was_mapped = FALSE;

  unset_titlebar (window);

  if (titlebar == NULL)
    {
      priv->client_decorated = FALSE;
      gtk_widget_remove_css_class (widget, GTK_STYLE_CLASS_CSD);

      goto out;
    }

  priv->use_client_shadow = gtk_window_supports_client_shadow (window);

  gtk_window_enable_csd (window);
  priv->title_box = titlebar;
  /* Same reason as in gtk_window_set_child */
  gtk_css_node_insert_before (gtk_widget_get_css_node (GTK_WIDGET (window)),
                              gtk_widget_get_css_node (titlebar),
                              NULL);

  gtk_widget_set_parent (priv->title_box, widget);

  gtk_widget_add_css_class (titlebar, GTK_STYLE_CLASS_TITLEBAR);

out:
  if (was_mapped)
    gtk_widget_map (widget);
}

/**
 * gtk_window_get_titlebar:
 * @window: a #GtkWindow
 *
 * Returns the custom titlebar that has been set with
 * gtk_window_set_titlebar().
 *
 * Returns: (nullable) (transfer none): the custom titlebar, or %NULL
 */
GtkWidget *
gtk_window_get_titlebar (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), NULL);

  /* Don't return the internal titlebar */
  if (priv->title_box == priv->titlebar)
    return NULL;

  return priv->title_box;
}

/**
 * gtk_window_set_decorated:
 * @window: a #GtkWindow
 * @setting: %TRUE to decorate the window
 *
 * By default, windows are decorated with a title bar, resize
 * controls, etc.  Some [window managers][gtk-X11-arch]
 * allow GTK+ to disable these decorations, creating a
 * borderless window. If you set the decorated property to %FALSE
 * using this function, GTK+ will do its best to convince the window
 * manager not to decorate the window. Depending on the system, this
 * function may not have any effect when called on a window that is
 * already visible, so you should call it before calling gtk_widget_show().
 *
 * On Windows, this function always works, since there’s no window manager
 * policy involved.
 * 
 **/
void
gtk_window_set_decorated (GtkWindow *window,
                          gboolean   setting)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  setting = setting != FALSE;

  if (setting == priv->decorated)
    return;

  priv->decorated = setting;

  if (priv->surface)
    gdk_toplevel_set_decorated (GDK_TOPLEVEL (priv->surface), priv->decorated && !priv->client_decorated);

  update_window_actions (window);
  gtk_widget_queue_resize (GTK_WIDGET (window));

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_DECORATED]);
}

/**
 * gtk_window_get_decorated:
 * @window: a #GtkWindow
 *
 * Returns whether the window has been set to have decorations
 * such as a title bar via gtk_window_set_decorated().
 *
 * Returns: %TRUE if the window has been set to have decorations
 **/
gboolean
gtk_window_get_decorated (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), TRUE);

  return priv->decorated;
}

/**
 * gtk_window_set_deletable:
 * @window: a #GtkWindow
 * @setting: %TRUE to decorate the window as deletable
 *
 * By default, windows have a close button in the window frame. Some 
 * [window managers][gtk-X11-arch] allow GTK+ to 
 * disable this button. If you set the deletable property to %FALSE
 * using this function, GTK+ will do its best to convince the window
 * manager not to show a close button. Depending on the system, this
 * function may not have any effect when called on a window that is
 * already visible, so you should call it before calling gtk_widget_show().
 *
 * On Windows, this function always works, since there’s no window manager
 * policy involved.
 */
void
gtk_window_set_deletable (GtkWindow *window,
			  gboolean   setting)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  setting = setting != FALSE;

  if (setting == priv->deletable)
    return;

  priv->deletable = setting;

  if (priv->surface)
    gdk_toplevel_set_deletable (GDK_TOPLEVEL (priv->surface), priv->deletable);

  update_window_actions (window);

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_DELETABLE]);
}

/**
 * gtk_window_get_deletable:
 * @window: a #GtkWindow
 *
 * Returns whether the window has been set to have a close button
 * via gtk_window_set_deletable().
 *
 * Returns: %TRUE if the window has been set to have a close button
 **/
gboolean
gtk_window_get_deletable (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), TRUE);

  return priv->deletable;
}

static GtkWindowIconInfo*
get_icon_info (GtkWindow *window)
{
  return g_object_get_qdata (G_OBJECT (window), quark_gtk_window_icon_info);
}
     
static void
free_icon_info (GtkWindowIconInfo *info)
{
  g_free (info->icon_name);
  g_slice_free (GtkWindowIconInfo, info);
}


static GtkWindowIconInfo*
ensure_icon_info (GtkWindow *window)
{
  GtkWindowIconInfo *info;

  info = get_icon_info (window);
  
  if (info == NULL)
    {
      info = g_slice_new0 (GtkWindowIconInfo);
      g_object_set_qdata_full (G_OBJECT (window),
                              quark_gtk_window_icon_info,
                              info,
                              (GDestroyNotify)free_icon_info);
    }

  return info;
}

static int
icon_size_compare (GdkTexture *a,
                   GdkTexture *b)
{
  int area_a, area_b;

  area_a = gdk_texture_get_width (a) * gdk_texture_get_height (a);
  area_b = gdk_texture_get_width (b) * gdk_texture_get_height (b);

  return area_a - area_b;
}

static GdkTexture *
render_paintable_to_texture (GdkPaintable *paintable)
{
  GtkSnapshot *snapshot;
  GskRenderNode *node;
  int width, height;
  cairo_surface_t *surface;
  cairo_t *cr;
  GdkTexture *texture;

  width = gdk_paintable_get_intrinsic_width (paintable);
  height = gdk_paintable_get_intrinsic_height (paintable);

  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);

  snapshot = gtk_snapshot_new ();
  gdk_paintable_snapshot (paintable, snapshot, width, height);
  node = gtk_snapshot_free_to_node (snapshot);

  cr = cairo_create (surface);
  gsk_render_node_draw (node, cr);
  cairo_destroy (cr);

  gsk_render_node_unref (node);

  texture = gdk_texture_new_for_surface (surface);
  cairo_surface_destroy (surface);

  return texture;
}

static GList *
icon_list_from_theme (GtkWindow   *window,
		      const gchar *name)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GList *list;
  GtkIconTheme *icon_theme;
  GtkIconPaintable *info;
  GdkTexture *texture;
  gint *sizes;
  gint i;

  icon_theme = gtk_icon_theme_get_for_display (priv->display);

  sizes = gtk_icon_theme_get_icon_sizes (icon_theme, name);

  list = NULL;
  for (i = 0; sizes[i]; i++)
    {
      /* FIXME
       * We need an EWMH extension to handle scalable icons
       * by passing their name to the WM. For now just use a
       * fixed size of 48.
       */
      if (sizes[i] == -1)
        info = gtk_icon_theme_lookup_icon (icon_theme, name, NULL,
                                           48, priv->scale,
                                           gtk_widget_get_direction (GTK_WIDGET (window)),
                                           0);
      else
        info = gtk_icon_theme_lookup_icon (icon_theme, name, NULL,
                                           sizes[i], priv->scale,
                                           gtk_widget_get_direction (GTK_WIDGET (window)),
                                           0);

      texture = render_paintable_to_texture (GDK_PAINTABLE (info));
      list = g_list_insert_sorted (list, texture, (GCompareFunc) icon_size_compare);
      g_object_unref (info);
    }

  g_free (sizes);

  return list;
}

static void
gtk_window_realize_icon (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWindowIconInfo *info;
  GList *icon_list = NULL;

  g_return_if_fail (priv->surface != NULL);

  info = ensure_icon_info (window);

  if (info->realized)
    return;

  info->using_default_icon = FALSE;
  info->using_themed_icon = FALSE;

  /* Look up themed icon */
  if (icon_list == NULL && info->icon_name)
    {
      icon_list = icon_list_from_theme (window, info->icon_name);
      if (icon_list)
        info->using_themed_icon = TRUE;
    }

  /* Look up themed icon */
  if (icon_list == NULL && default_icon_name)
    {
      icon_list = icon_list_from_theme (window, default_icon_name);
      info->using_default_icon = TRUE;
      info->using_themed_icon = TRUE;
    }

  info->realized = TRUE;

  gdk_toplevel_set_icon_list (GDK_TOPLEVEL (priv->surface), icon_list);

  if (info->using_themed_icon)
    g_list_free_full (icon_list, g_object_unref);
}

GdkPaintable *
gtk_window_get_icon_for_size (GtkWindow *window,
                              int        size)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  const char *name;
  GtkIconPaintable *info;

  name = gtk_window_get_icon_name (window);

  if (!name)
    name = default_icon_name;
  if (!name)
    return NULL;

  info = gtk_icon_theme_lookup_icon (gtk_icon_theme_get_for_display (gtk_widget_get_display (GTK_WIDGET (window))),
                                     name, NULL, size, priv->scale,
                                     gtk_widget_get_direction (GTK_WIDGET (window)),
                                     0);
  if (info == NULL)
    return NULL;

  return GDK_PAINTABLE (info);
}

static void
gtk_window_unrealize_icon (GtkWindow *window)
{
  GtkWindowIconInfo *info;

  info = get_icon_info (window);

  if (info == NULL)
    return;
  
  /* We don't clear the properties on the window, just figure the
   * window is going away.
   */

  info->realized = FALSE;

}

static void 
update_themed_icon (GtkWindow *window)
{
  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_ICON_NAME]);
  
  gtk_window_unrealize_icon (window);
  
  if (_gtk_widget_get_realized (GTK_WIDGET (window)))
    gtk_window_realize_icon (window);  
}

/**
 * gtk_window_set_icon_name:
 * @window: a #GtkWindow
 * @name: (allow-none): the name of the themed icon
 *
 * Sets the icon for the window from a named themed icon.
 * See the docs for #GtkIconTheme for more details.
 * On some platforms, the window icon is not used at all.
 *
 * Note that this has nothing to do with the WM_ICON_NAME 
 * property which is mentioned in the ICCCM.
 */
void 
gtk_window_set_icon_name (GtkWindow   *window,
			  const gchar *name)
{
  GtkWindowIconInfo *info;
  gchar *tmp;

  g_return_if_fail (GTK_IS_WINDOW (window));

  info = ensure_icon_info (window);

  if (g_strcmp0 (info->icon_name, name) == 0)
    return;

  tmp = info->icon_name;
  info->icon_name = g_strdup (name);
  g_free (tmp);

  update_themed_icon (window);

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_ICON_NAME]);
}

/**
 * gtk_window_get_icon_name:
 * @window: a #GtkWindow
 *
 * Returns the name of the themed icon for the window,
 * see gtk_window_set_icon_name().
 *
 * Returns: (nullable): the icon name or %NULL if the window has
 * no themed icon
 */
const gchar *
gtk_window_get_icon_name (GtkWindow *window)
{
  GtkWindowIconInfo *info;

  g_return_val_if_fail (GTK_IS_WINDOW (window), NULL);

  info = ensure_icon_info (window);

  return info->icon_name;
}

/**
 * gtk_window_set_default_icon_name:
 * @name: the name of the themed icon
 *
 * Sets an icon to be used as fallback for windows that haven't
 * had gtk_window_set_icon_list() called on them from a named
 * themed icon, see gtk_window_set_icon_name().
 **/
void
gtk_window_set_default_icon_name (const gchar *name)
{
  GList *tmp_list;
  GList *toplevels;

  g_free (default_icon_name);
  default_icon_name = g_strdup (name);

  /* Update all toplevels */
  toplevels = gtk_window_list_toplevels ();
  tmp_list = toplevels;
  while (tmp_list != NULL)
    {
      GtkWindowIconInfo *info;
      GtkWindow *w = tmp_list->data;
      
      info = get_icon_info (w);
      if (info && info->using_default_icon && info->using_themed_icon)
        {
          gtk_window_unrealize_icon (w);
          if (_gtk_widget_get_realized (GTK_WIDGET (w)))
            gtk_window_realize_icon (w);
        }

      tmp_list = tmp_list->next;
    }
  g_list_free (toplevels);
}

/**
 * gtk_window_get_default_icon_name:
 *
 * Returns the fallback icon name for windows that has been set
 * with gtk_window_set_default_icon_name(). The returned
 * string is owned by GTK+ and should not be modified. It
 * is only valid until the next call to
 * gtk_window_set_default_icon_name().
 *
 * Returns: the fallback icon name for windows
 */
const gchar *
gtk_window_get_default_icon_name (void)
{
  return default_icon_name;
}

#define INCLUDE_CSD_SIZE 1
#define EXCLUDE_CSD_SIZE -1

static void
gtk_window_update_csd_size (GtkWindow *window,
                            gint      *width,
                            gint      *height,
                            gint       apply)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkBorder window_border = { 0 };
  gint w, h;

  if (!priv->decorated ||
      priv->fullscreen)
    return;

  get_shadow_width (window, &window_border);
  w = *width + apply * (window_border.left + window_border.right);
  h = *height + apply * (window_border.top + window_border.bottom);

  if (priv->title_box != NULL &&
      gtk_widget_get_visible (priv->title_box) &&
      gtk_widget_get_child_visible (priv->title_box))
    {
      gint minimum_height;
      gint natural_height;

      gtk_widget_measure (priv->title_box, GTK_ORIENTATION_VERTICAL, -1,
                          &minimum_height, &natural_height,
                          NULL, NULL);
      h += apply * natural_height;
    }

  /* Make sure the size remains acceptable */
  if (w < 1)
    w = 1;
  if (h < 1)
    h = 1;

  /* Only update given size if not negative */
  if (*width > -1)
    *width = w;
  if (*height > -1)
    *height = h;
}

static void
gtk_window_set_default_size_internal (GtkWindow    *window,
                                      gboolean      change_width,
                                      gint          width,
                                      gboolean      change_height,
                                      gint          height)
{
  GtkWindowGeometryInfo *info;

  g_return_if_fail (change_width == FALSE || width >= -1);
  g_return_if_fail (change_height == FALSE || height >= -1);

  info = gtk_window_get_geometry_info (window, TRUE);

  g_object_freeze_notify (G_OBJECT (window));

  if (change_width)
    {
      if (width == 0)
        width = 1;

      if (width < 0)
        width = -1;

      if (info->default_width != width)
        {
          info->default_width = width;
          g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_DEFAULT_WIDTH]);
        }
    }

  if (change_height)
    {
      if (height == 0)
        height = 1;

      if (height < 0)
        height = -1;

      if (info->default_height != height)
        {
          info->default_height = height;
          g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_DEFAULT_HEIGHT]);
        }
    }
  
  g_object_thaw_notify (G_OBJECT (window));
  
  gtk_widget_queue_resize (GTK_WIDGET (window));
}

/**
 * gtk_window_set_default_size:
 * @window: a #GtkWindow
 * @width: width in pixels, or -1 to unset the default width
 * @height: height in pixels, or -1 to unset the default height
 *
 * Sets the default size of a window. If the window’s “natural” size
 * (its size request) is larger than the default, the default will be
 * ignored.
 *
 * Unlike gtk_widget_set_size_request(), which sets a size request for
 * a widget and thus would keep users from shrinking the window, this
 * function only sets the initial size, just as if the user had
 * resized the window themselves. Users can still shrink the window
 * again as they normally would. Setting a default size of -1 means to
 * use the “natural” default size (the size request of the window).
 *
 * For some uses, gtk_window_resize() is a more appropriate function.
 * gtk_window_resize() changes the current size of the window, rather
 * than the size to be used on initial display. gtk_window_resize() always
 * affects the window itself, not the geometry widget.
 *
 * The default size of a window only affects the first time a window is
 * shown; if a window is hidden and re-shown, it will remember the size
 * it had prior to hiding, rather than using the default size.
 *
 * Windows can’t actually be 0x0 in size, they must be at least 1x1, but
 * passing 0 for @width and @height is OK, resulting in a 1x1 default size.
 *
 * If you use this function to reestablish a previously saved window size,
 * note that the appropriate size to save is the one returned by
 * gtk_window_get_size(). Using the window allocation directly will not
 * work in all circumstances and can lead to growing or shrinking windows.
 */
void
gtk_window_set_default_size (GtkWindow   *window,
			     gint         width,
			     gint         height)
{
  g_return_if_fail (GTK_IS_WINDOW (window));
  g_return_if_fail (width >= -1);
  g_return_if_fail (height >= -1);

  gtk_window_set_default_size_internal (window, TRUE, width, TRUE, height);
}

/**
 * gtk_window_get_default_size:
 * @window: a #GtkWindow
 * @width: (out) (allow-none): location to store the default width, or %NULL
 * @height: (out) (allow-none): location to store the default height, or %NULL
 *
 * Gets the default size of the window. A value of -1 for the width or
 * height indicates that a default size has not been explicitly set
 * for that dimension, so the “natural” size of the window will be
 * used.
 * 
 **/
void
gtk_window_get_default_size (GtkWindow *window,
			     gint      *width,
			     gint      *height)
{
  GtkWindowGeometryInfo *info;

  g_return_if_fail (GTK_IS_WINDOW (window));

  info = gtk_window_get_geometry_info (window, FALSE);

  if (width)
    *width = info ? info->default_width : -1;

  if (height)
    *height = info ? info->default_height : -1;
}

/**
 * gtk_window_resize:
 * @window: a #GtkWindow
 * @width: width in pixels to resize the window to
 * @height: height in pixels to resize the window to
 *
 * Resizes the window as if the user had done so, obeying geometry
 * constraints. The default geometry constraint is that windows may
 * not be smaller than their size request; to override this
 * constraint, call gtk_widget_set_size_request() to set the window's
 * request to a smaller value.
 *
 * If gtk_window_resize() is called before showing a window for the
 * first time, it overrides any default size set with
 * gtk_window_set_default_size().
 *
 * Windows may not be resized smaller than 1 by 1 pixels.
 * 
 * When using client side decorations, GTK+ will do its best to adjust
 * the given size so that the resulting window size matches the
 * requested size without the title bar, borders and shadows added for
 * the client side decorations, but there is no guarantee that the
 * result will be totally accurate because these widgets added for
 * client side decorations depend on the theme and may not be realized
 * or visible at the time gtk_window_resize() is issued.
 *
 * If the GtkWindow has a titlebar widget (see gtk_window_set_titlebar()), then
 * typically, gtk_window_resize() will compensate for the height of the titlebar
 * widget only if the height is known when the resulting GtkWindow configuration
 * is issued.
 * For example, if new widgets are added after the GtkWindow configuration
 * and cause the titlebar widget to grow in height, this will result in a
 * window content smaller that specified by gtk_window_resize() and not
 * a larger window.
 *
 **/
void
gtk_window_resize (GtkWindow *window,
                   gint       width,
                   gint       height)
{
  GtkWindowGeometryInfo *info;
  
  g_return_if_fail (GTK_IS_WINDOW (window));
  g_return_if_fail (width > 0);
  g_return_if_fail (height > 0);

  info = gtk_window_get_geometry_info (window, TRUE);

  info->resize_width = width;
  info->resize_height = height;

  gtk_widget_queue_resize (GTK_WIDGET (window));
}

/**
 * gtk_window_get_size:
 * @window: a #GtkWindow
 * @width: (out) (optional): return location for width, or %NULL
 * @height: (out) (optional): return location for height, or %NULL
 *
 * Obtains the current size of @window.
 *
 * If @window is not visible on screen, this function return the size GTK+
 * will suggest to the [window manager][gtk-X11-arch] for the initial window
 * size (but this is not reliably the same as the size the window manager
 * will actually select). See: gtk_window_set_default_size().
 *
 * Depending on the windowing system and the window manager constraints,
 * the size returned by this function may not match the size set using
 * gtk_window_resize(); additionally, since gtk_window_resize() may be
 * implemented as an asynchronous operation, GTK+ cannot guarantee in any
 * way that this code:
 *
 * |[<!-- language="C" -->
 *   GtkWindow *window = GTK_WINDOW (gtk_window_new ());
 *   int width = 500;
 *   int height = 300;
 *   gtk_window_resize (window, width, height);
 *
 *   int new_width, new_height;
 *   gtk_window_get_size (window, &new_width, &new_height);
 * ]|
 *
 * will result in `new_width` and `new_height` matching `width` and
 * `height`, respectively.
 *
 * This function will return the logical size of the #GtkWindow,
 * excluding the widgets used in client side decorations; there is,
 * however, no guarantee that the result will be completely accurate
 * because client side decoration may include widgets that depend on
 * the user preferences and that may not be visibile at the time you
 * call this function.
 *
 * The dimensions returned by this function are suitable for being
 * stored across sessions; use gtk_window_set_default_size() to
 * restore them when before showing the window.
 *
 * |[<!-- language="C" -->
 * static void
 * on_size_allocate (GtkWidget *widget,
 *                   const GtkAllocation *allocation,
 *                   int baseline)
 * {
 *   int new_width, new_height;
 *
 *   gtk_window_get_size (GTK_WINDOW (widget), &new_width, &new_height);
 *
 *   // ...
 * }
 * ]|
 *
 * If you are getting a window size in order to position the window
 * on the screen, you should, instead, simply set the window’s semantic
 * type with gtk_window_set_type_hint(), which allows the window manager
 * to e.g. center dialogs. Also, if you set the transient parent of
 * dialogs with gtk_window_set_transient_for() window managers will
 * often center the dialog over its parent window. It's much preferred
 * to let the window manager handle these cases rather than doing it
 * yourself, because all apps will behave consistently and according to
 * user or system preferences, if the window manager handles it. Also,
 * the window manager can take into account the size of the window
 * decorations and border that it may add, and of which GTK+ has no
 * knowledge. Additionally, positioning windows in global screen coordinates
 * may not be allowed by the windowing system. For more information,
 * see: gtk_window_set_position().
 */
void
gtk_window_get_size (GtkWindow *window,
                     gint      *width,
                     gint      *height)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gint w, h;

  g_return_if_fail (GTK_IS_WINDOW (window));

  if (width == NULL && height == NULL)
    return;

  if (_gtk_widget_get_mapped (GTK_WIDGET (window)))
    {
      w = gdk_surface_get_width (priv->surface);
      h = gdk_surface_get_height (priv->surface);
    }
  else
    {
      GdkRectangle configure_request;

      gtk_window_compute_configure_request (window,
                                            &configure_request,
                                            NULL, NULL);

      w = configure_request.width;
      h = configure_request.height;
    }

  gtk_window_update_csd_size (window, &w, &h, EXCLUDE_CSD_SIZE);

  if (width)
    *width = w;
  if (height)
    *height = h;
}

static gboolean
gtk_window_close_request (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->hide_on_close)
    {
      gtk_widget_hide (GTK_WIDGET (window));
      return TRUE;
    }

  return FALSE;
}

gboolean
gtk_window_emit_close_request (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gboolean handled;

  /* Avoid re-entrancy issues when calling gtk_window_close from a
   * close-request handler */
  if (priv->in_emit_close_request)
    return TRUE;

  priv->in_emit_close_request = TRUE;
  g_signal_emit (window, window_signals[CLOSE_REQUEST], 0, &handled);
  priv->in_emit_close_request = FALSE;

  return handled;
}

static void
gtk_window_finalize (GObject *object)
{
  GtkWindow *window = GTK_WINDOW (object);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_clear_pointer (&priv->extra_input_region, cairo_region_destroy);
  g_free (priv->title);
  gtk_window_release_application (window);

  if (priv->geometry_info)
    {
      g_free (priv->geometry_info);
    }

  if (priv->keys_changed_handler)
    {
      g_source_remove (priv->keys_changed_handler);
      priv->keys_changed_handler = 0;
    }

  g_signal_handlers_disconnect_by_func (gdk_display_get_default_seat (priv->display),
                                        device_removed_cb,
                                        window);

#ifdef GDK_WINDOWING_X11
  g_signal_handlers_disconnect_by_func (gtk_settings_get_for_display (priv->display),
                                        gtk_window_on_theme_variant_changed,
                                        window);
#endif

  g_free (priv->startup_id);

  if (priv->mnemonics_display_timeout_id)
    {
      g_source_remove (priv->mnemonics_display_timeout_id);
      priv->mnemonics_display_timeout_id = 0;
    }

  if (priv->focus_visible_timeout)
    {
      g_source_remove (priv->focus_visible_timeout);
      priv->focus_visible_timeout = 0;
    }

  g_clear_object (&priv->constraint_solver);
  g_clear_object (&priv->renderer);
  g_clear_object (&priv->resize_cursor);

  G_OBJECT_CLASS (gtk_window_parent_class)->finalize (object);
}

static gboolean
update_csd_visibility (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gboolean visible;

  if (priv->title_box == NULL)
    return FALSE;

  visible = !priv->fullscreen &&
            priv->decorated;

  gtk_widget_set_child_visible (priv->title_box, visible);

  return visible;
}

static void
update_window_actions (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gboolean is_sovereign_window = !priv->modal && !priv->transient_parent;

  gtk_widget_action_set_enabled (GTK_WIDGET (window), "window.minimize",
                                 is_sovereign_window);
  gtk_widget_action_set_enabled (GTK_WIDGET (window), "window.toggle-maximized",
                                 priv->resizable && is_sovereign_window);
  gtk_widget_action_set_enabled (GTK_WIDGET (window), "window.close",
                                 priv->deletable);

  update_csd_visibility (window);
}

static GtkWidget *
create_titlebar (GtkWindow *window)
{
  GtkWidget *titlebar = gtk_header_bar_new ();
  gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (titlebar), TRUE);
  gtk_widget_add_css_class (titlebar, GTK_STYLE_CLASS_TITLEBAR);
  gtk_widget_add_css_class (titlebar, "default-decoration");

  return titlebar;
}

void
_gtk_window_request_csd (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  priv->csd_requested = TRUE;
}

static gboolean
gtk_window_should_use_csd (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  const gchar *csd_env;

  if (priv->csd_requested)
    return TRUE;

  if (!priv->decorated)
    return FALSE;

  csd_env = g_getenv ("GTK_CSD");

#ifdef GDK_WINDOWING_BROADWAY
  if (GDK_IS_BROADWAY_DISPLAY (gtk_widget_get_display (GTK_WIDGET (window))))
    return TRUE;
#endif

#ifdef GDK_WINDOWING_WAYLAND
  if (GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (GTK_WIDGET (window))))
    {
      GdkDisplay *gdk_display = gtk_widget_get_display (GTK_WIDGET (window));
      return !gdk_wayland_display_prefers_ssd (gdk_display);
    }
#endif

#ifdef GDK_WINDOWING_WIN32
  if (g_strcmp0 (csd_env, "0") != 0 &&
      GDK_IS_WIN32_DISPLAY (gtk_widget_get_display (GTK_WIDGET (window))))
    return TRUE;
#endif

  return (g_strcmp0 (csd_env, "1") == 0);
}

static void
create_decoration (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  priv->use_client_shadow = gtk_window_supports_client_shadow (window);
  if (!priv->use_client_shadow)
    return;

  gtk_window_enable_csd (window);

  if (priv->title_box == NULL)
    {
      priv->titlebar = create_titlebar (window);
      gtk_widget_set_parent (priv->titlebar, widget);
      priv->title_box = priv->titlebar;
    }

  update_window_actions (window);
}

static void
gtk_window_show (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  _gtk_widget_set_visible_flag (widget, TRUE);

  gtk_css_node_validate (gtk_widget_get_css_node (widget));

  gtk_widget_realize (widget);

  gtk_window_check_resize (window);

  gtk_widget_map (widget);

  if (!priv->focus_widget)
    gtk_window_move_focus (widget, GTK_DIR_TAB_FORWARD);
  
  if (priv->modal)
    gtk_grab_add (widget);
}

static void
gtk_window_hide (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  _gtk_widget_set_visible_flag (widget, FALSE);
  gtk_widget_unmap (widget);

  if (priv->modal)
    gtk_grab_remove (widget);
}

static GdkToplevelLayout *
gtk_window_compute_layout (GtkWindow *window,
                           int        min_width,
                           int        min_height)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GdkToplevelLayout *layout;

  layout = gdk_toplevel_layout_new (min_width, min_height);

  gdk_toplevel_layout_set_resizable (layout, priv->resizable);
  gdk_toplevel_layout_set_maximized (layout, priv->maximize_initially);
  gdk_toplevel_layout_set_fullscreen (layout,
                                      priv->fullscreen_initially,
                                      priv->initial_fullscreen_monitor);

  return layout;
}

static void
gtk_window_present_toplevel (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GdkRectangle request;
  GdkGeometry geometry;
  GdkSurfaceHints flags;

  gtk_window_compute_configure_request (window, &request,
                                        &geometry, &flags);

  if (!(flags & GDK_HINT_MIN_SIZE))
    geometry.min_width = geometry.min_height = 1;

  if (!priv->layout)
    priv->layout = gtk_window_compute_layout (window, geometry.min_width, geometry.min_height);

  gdk_toplevel_present (GDK_TOPLEVEL (priv->surface),
                        request.width,
                        request.height,
                        priv->layout);
}

static void
gtk_window_update_toplevel (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  
  if (priv->surface && gdk_surface_get_mapped (priv->surface))
    {
      int min_width = 1;
      int  min_height = 1;

      if (priv->layout)
        {
          min_width = gdk_toplevel_layout_get_min_width (priv->layout);
          min_height = gdk_toplevel_layout_get_min_height (priv->layout);
        }

      g_clear_pointer (&priv->layout, gdk_toplevel_layout_unref);
      priv->layout = gtk_window_compute_layout (window, min_width, min_height);

      gdk_toplevel_present (GDK_TOPLEVEL (priv->surface),
                            gdk_surface_get_width (priv->surface),
                            gdk_surface_get_height (priv->surface),
                            priv->layout);
    }
}

static void
gtk_window_map (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *child = priv->child;

  GTK_WIDGET_CLASS (gtk_window_parent_class)->map (widget);

  if (child != NULL && gtk_widget_get_visible (child))
    gtk_widget_map (child);

  if (priv->title_box != NULL &&
      gtk_widget_get_visible (priv->title_box) &&
      gtk_widget_get_child_visible (priv->title_box))
    gtk_widget_map (priv->title_box);

  gtk_window_present_toplevel (window);

  if (priv->minimize_initially)
    gdk_toplevel_minimize (GDK_TOPLEVEL (priv->surface));

  gtk_window_set_theme_variant (window);

  /* No longer use the default settings */
  priv->need_default_size = FALSE;

  if (!disable_startup_notification)
    {
      /* Do we have a custom startup-notification id? */
      if (priv->startup_id != NULL)
        {
          /* Make sure we have a "real" id */
          if (!startup_id_is_fake (priv->startup_id))
            gdk_display_notify_startup_complete (gtk_widget_get_display (widget), priv->startup_id);

          g_free (priv->startup_id);
          priv->startup_id = NULL;
        }
       else
         gdk_display_notify_startup_complete (gtk_widget_get_display (widget), NULL);
    }

  /* inherit from transient parent, so that a dialog that is
   * opened via keynav shows focus initially
   */
  if (priv->transient_parent)
    gtk_window_set_focus_visible (window, gtk_window_get_focus_visible (priv->transient_parent));
  else
    gtk_window_set_focus_visible (window, FALSE);

  if (priv->application)
    gtk_application_handle_window_map (priv->application, window);
}

static void
gtk_window_unmap (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *child = priv->child;
  GdkSurfaceState state;

  GTK_WIDGET_CLASS (gtk_window_parent_class)->unmap (widget);
  gdk_surface_hide (priv->surface);

  while (priv->configure_request_count > 0)
    {
      priv->configure_request_count--;
      gdk_surface_thaw_toplevel_updates (priv->surface);
    }
  priv->configure_notify_received = FALSE;

  state = gdk_toplevel_get_state (GDK_TOPLEVEL (priv->surface));
  priv->minimize_initially = (state & GDK_SURFACE_STATE_MINIMIZED) != 0;
  priv->maximize_initially = (state & GDK_SURFACE_STATE_MAXIMIZED) != 0;

  if (priv->title_box != NULL)
    gtk_widget_unmap (priv->title_box);

  if (child != NULL)
    gtk_widget_unmap (child);
}

/* (Note: Replace "size" with "width" or "height". Also, the request
 * mode is honoured.)
 * For selecting the default window size, the following conditions
 * should hold (in order of importance):
 * - the size is not below the minimum size
 *   Windows cannot be resized below their minimum size, so we must
 *   ensure we don’t do that either.
 * - the size is not above the natural size
 *   It seems weird to allocate more than this in an initial guess.
 * - the size does not exceed that of a maximized window
 *   We want to see the whole window after all.
 *   (Note that this may not be possible to achieve due to imperfect
 *    information from the windowing system.)
 */

static void
gtk_window_guess_default_size (GtkWindow *window,
                               gint      *width,
                               gint      *height)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget;
  GdkSurface *surface;
  GdkDisplay *display;
  GdkMonitor *monitor;
  GdkRectangle workarea;
  int minimum, natural;

  widget = GTK_WIDGET (window);
  display = gtk_widget_get_display (widget);
  surface = priv->surface;

  if (surface)
    monitor = gdk_display_get_monitor_at_surface (display, surface);
  else
    monitor = gdk_display_get_monitor (display, 0);

  gdk_monitor_get_workarea (monitor, &workarea);

  *width = workarea.width;
  *height = workarea.height;

  if (gtk_widget_get_request_mode (widget) == GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT)
    {
      gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL, -1,
                          &minimum, &natural,
                          NULL, NULL);
      *height = MAX (minimum, MIN (*height, natural));

      gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL,
                          *height,
                          &minimum, &natural,
                          NULL, NULL);
      *width = MAX (minimum, MIN (*width, natural));
    }
  else /* GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or CONSTANT_SIZE */
    {
      gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
                          &minimum, &natural,
                          NULL, NULL);
      *width = MAX (minimum, MIN (*width, natural));

      gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL,
                          *width,
                          &minimum, &natural,
                          NULL, NULL);
      *height = MAX (minimum, MIN (*height, natural));
    }
}

static void
gtk_window_get_remembered_size (GtkWindow *window,
                                int       *width,
                                int       *height)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWindowGeometryInfo *info;

  *width = 0;
  *height = 0;

  if (priv->surface)
    {
      *width = gdk_surface_get_width (priv->surface);
      *height = gdk_surface_get_height (priv->surface);
      return;
    }

  info = gtk_window_get_geometry_info (window, FALSE);
  if (info)
    {
      /* MAX() works even if the last request is unset with -1 */
      *width = MAX (*width, info->last.configure_request.width);
      *height = MAX (*height, info->last.configure_request.height);
    }
}

static void
check_scale_changed (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget = GTK_WIDGET (window);
  int old_scale;

  old_scale = priv->scale;
  priv->scale = gtk_widget_get_scale_factor (widget);
  if (old_scale != priv->scale)
    _gtk_widget_scale_changed (widget);
}

static void
sum_borders (GtkBorder *one,
             GtkBorder *two)
{
  one->top += two->top;
  one->right += two->right;
  one->bottom += two->bottom;
  one->left += two->left;
}

static void
max_borders (GtkBorder *one,
             GtkBorder *two)
{
  one->top = MAX (one->top, two->top);
  one->right = MAX (one->right, two->right);
  one->bottom = MAX (one->bottom, two->bottom);
  one->left = MAX (one->left, two->left);
}

static void
subtract_borders (GtkBorder *one,
                  GtkBorder *two)
{
  one->top -= two->top;
  one->right -= two->right;
  one->bottom -= two->bottom;
  one->left -= two->left;
}

static void
get_shadow_width (GtkWindow *window,
                  GtkBorder *shadow_width)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkBorder border = { 0 };
  GtkBorder d = { 0 };
  GtkBorder margin;
  GtkStyleContext *context;
  GtkCssValue *shadows;

  *shadow_width = border;

  if (!priv->decorated)
    return;

  if (!priv->client_decorated &&
      !(gtk_window_should_use_csd (window) &&
        gtk_window_supports_client_shadow (window)))
    return;

  if (priv->maximized ||
      priv->fullscreen)
    return;

  context = _gtk_widget_get_style_context (GTK_WIDGET (window));

  gtk_style_context_save_to_node (context, priv->decoration_node);

  /* Always sum border + padding */
  gtk_style_context_get_border (context, &border);
  gtk_style_context_get_padding (context, &d);
  sum_borders (&d, &border);

  /* Calculate the size of the drop shadows ... */
  shadows = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BOX_SHADOW);
  gtk_css_shadow_value_get_extents (shadows, &border);

  /* ... and compare it to the margin size, which we use for resize grips */
  gtk_style_context_get_margin (context, &margin);
  max_borders (&border, &margin);

  sum_borders (&d, &border);
  *shadow_width = d;

  gtk_style_context_restore (context);
}

static void
update_csd_shape (GtkWindow *window)
{
  GtkWidget *widget = (GtkWidget *)window;
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  cairo_rectangle_int_t rect;
  GtkBorder border, tmp;
  GtkBorder window_border;
  GtkStyleContext *context;

  if (!priv->client_decorated)
    return;

  context = _gtk_widget_get_style_context (widget);

  gtk_style_context_save_to_node (context, priv->decoration_node);
  gtk_style_context_get_margin (context, &border);
  gtk_style_context_get_border (context, &tmp);
  sum_borders (&border, &tmp);
  gtk_style_context_get_padding (context, &tmp);
  sum_borders (&border, &tmp);
  gtk_style_context_restore (context);
  get_shadow_width (window, &window_border);

  /* update the input shape, which makes it so that clicks
   * outside the border windows go through.
   */

  subtract_borders (&window_border, &border);

  rect.x = window_border.left;
  rect.y = window_border.top;
  rect.width = gtk_widget_get_allocated_width (widget) - window_border.left - window_border.right;
  rect.height = gtk_widget_get_allocated_height (widget) - window_border.top - window_border.bottom;

  if (rect.width > 0 && rect.height > 0)
    {
      cairo_region_t *region = cairo_region_create_rectangle (&rect);

      if (priv->extra_input_region)
        cairo_region_intersect (region, priv->extra_input_region);

      gdk_surface_set_input_region (priv->surface, region);
      cairo_region_destroy (region);
    }
}

void
gtk_window_set_extra_input_region (GtkWindow      *window,
                                   cairo_region_t *region)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_clear_pointer (&priv->extra_input_region, cairo_region_destroy);
  priv->extra_input_region = cairo_region_copy (region);
  update_csd_shape (window);
}

static void
corner_rect (cairo_rectangle_int_t *rect,
             const GtkCssValue     *value)
{
  rect->width = _gtk_css_corner_value_get_x (value, 100);
  rect->height = _gtk_css_corner_value_get_y (value, 100);
}

static void
subtract_decoration_corners_from_region (cairo_region_t        *region,
                                         cairo_rectangle_int_t *extents,
                                         GtkStyleContext       *context,
                                         GtkWindow             *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  cairo_rectangle_int_t rect;

  if (!priv->client_decorated ||
      !priv->decorated ||
      priv->fullscreen ||
      priv->maximized)
    return;

  gtk_style_context_save_to_node (context, priv->decoration_node);

  corner_rect (&rect, _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS));
  rect.x = extents->x;
  rect.y = extents->y;
  cairo_region_subtract_rectangle (region, &rect);

  corner_rect (&rect, _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS));
  rect.x = extents->x + extents->width - rect.width;
  rect.y = extents->y;
  cairo_region_subtract_rectangle (region, &rect);

  corner_rect (&rect, _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS));
  rect.x = extents->x;
  rect.y = extents->y + extents->height - rect.height;
  cairo_region_subtract_rectangle (region, &rect);

  corner_rect (&rect, _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS));
  rect.x = extents->x + extents->width - rect.width;
  rect.y = extents->y + extents->height - rect.height;
  cairo_region_subtract_rectangle (region, &rect);

  gtk_style_context_restore (context);
}

static void
update_opaque_region (GtkWindow           *window,
                      const GtkBorder     *border,
                      const GtkAllocation *allocation)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget = GTK_WIDGET (window);
  cairo_region_t *opaque_region;
  GtkStyleContext *context;
  gboolean is_opaque = FALSE;

  if (!_gtk_widget_get_realized (widget))
      return;

  context = gtk_widget_get_style_context (widget);

  is_opaque = gdk_rgba_is_opaque (gtk_css_color_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BACKGROUND_COLOR)));

  if (gtk_widget_get_opacity (widget) < 1.0)
    is_opaque = FALSE;

  if (is_opaque)
    {
      cairo_rectangle_int_t rect;

      rect.x = border->left;
      rect.y = border->top;
      rect.width = allocation->width - border->left - border->right;
      rect.height = allocation->height - border->top - border->bottom;

      opaque_region = cairo_region_create_rectangle (&rect);

      subtract_decoration_corners_from_region (opaque_region, &rect, context, window);
    }
  else
    {
      opaque_region = NULL;
    }

  gdk_surface_set_opaque_region (priv->surface, opaque_region);

  cairo_region_destroy (opaque_region);
}

static void
update_realized_window_properties (GtkWindow     *window,
                                   GtkAllocation *child_allocation,
                                   GtkBorder     *window_border)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->surface && priv->client_decorated && priv->use_client_shadow)
    gdk_surface_set_shadow_width (priv->surface,
                                  window_border->left,
                                  window_border->right,
                                  window_border->top,
                                  window_border->bottom);

  update_opaque_region (window, window_border, child_allocation);
  update_csd_shape (window);
}

static void
gtk_window_realize (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkAllocation allocation;
  GtkAllocation child_allocation;
  GdkSurface *surface;
  GtkBorder window_border;

  if (!priv->client_decorated && gtk_window_should_use_csd (window))
    create_decoration (widget);

  /* ensure widget tree is properly size allocated */
  if (_gtk_widget_get_alloc_needed (widget))
    {
      GdkRectangle request;

      gtk_window_compute_configure_request (window, &request, NULL, NULL);

      allocation.x = 0;
      allocation.y = 0;
      allocation.width = request.width;
      allocation.height = request.height;
      gtk_widget_size_allocate (widget, &allocation, -1);

      gtk_widget_queue_resize (widget);

      g_return_if_fail (!_gtk_widget_get_realized (widget));
    }

  gtk_widget_get_allocation (widget, &allocation);

  surface = gdk_surface_new_toplevel (gtk_widget_get_display (widget),
                                      MAX (1, allocation.width),
                                      MAX (1, allocation.height));
  priv->surface = surface;
  gdk_surface_set_widget (surface, widget);

  g_signal_connect_swapped (surface, "notify::state", G_CALLBACK (surface_state_changed), widget);
  g_signal_connect_swapped (surface, "size-changed", G_CALLBACK (surface_size_changed), widget);
  g_signal_connect (surface, "render", G_CALLBACK (surface_render), widget);
  g_signal_connect (surface, "event", G_CALLBACK (surface_event), widget);

  GTK_WIDGET_CLASS (gtk_window_parent_class)->realize (widget);

  gtk_root_start_layout (GTK_ROOT (window));

  if (priv->renderer == NULL)
    priv->renderer = gsk_renderer_new_for_surface (surface);

  if (priv->transient_parent &&
      _gtk_widget_get_realized (GTK_WIDGET (priv->transient_parent)))
    {
      GtkWindowPrivate *parent_priv = gtk_window_get_instance_private (priv->transient_parent);
      gdk_toplevel_set_transient_for (GDK_TOPLEVEL (surface), parent_priv->surface);
    }

  if (priv->title)
    gdk_toplevel_set_title (GDK_TOPLEVEL (surface), priv->title);

  gdk_toplevel_set_decorated (GDK_TOPLEVEL (surface), priv->decorated && !priv->client_decorated);
  gdk_toplevel_set_deletable (GDK_TOPLEVEL (surface), priv->deletable);

#ifdef GDK_WINDOWING_WAYLAND
  if (priv->client_decorated && GDK_IS_WAYLAND_SURFACE (surface))
    gdk_wayland_surface_announce_csd (surface);
#endif

  gdk_toplevel_set_modal (GDK_TOPLEVEL (surface), priv->modal);

  if (priv->startup_id)
    {
#ifdef GDK_WINDOWING_X11
      if (GDK_IS_X11_SURFACE (surface))
        {
          guint32 timestamp = extract_time_from_startup_id (priv->startup_id);
          if (timestamp != GDK_CURRENT_TIME)
            gdk_x11_surface_set_user_time (surface, timestamp);
        }
#endif
      if (!startup_id_is_fake (priv->startup_id))
        gdk_toplevel_set_startup_id (GDK_TOPLEVEL (surface), priv->startup_id);
    }

#ifdef GDK_WINDOWING_X11
  if (priv->initial_timestamp != GDK_CURRENT_TIME)
    {
      if (GDK_IS_X11_SURFACE (surface))
        gdk_x11_surface_set_user_time (surface, priv->initial_timestamp);
    }
#endif

  child_allocation.x = 0;
  child_allocation.y = 0;
  child_allocation.width = allocation.width;
  child_allocation.height = allocation.height;

  get_shadow_width (window, &window_border);

  update_realized_window_properties (window, &child_allocation, &window_border);

  if (priv->application)
    gtk_application_handle_window_realize (priv->application, window);

  /* Icons */
  gtk_window_realize_icon (window);

  check_scale_changed (window);
}

static void
gtk_window_unrealize (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWindowGeometryInfo *info;
  GdkSurface *surface;

  /* On unrealize, we reset the size of the window such
   * that we will re-apply the default sizing stuff
   * next time we show the window.
   *
   * Default positioning is reset on unmap, instead of unrealize.
   */
  priv->need_default_size = TRUE;
  info = gtk_window_get_geometry_info (window, FALSE);
  if (info)
    {
      info->resize_width = -1;
      info->resize_height = -1;
      info->last.configure_request.x = 0;
      info->last.configure_request.y = 0;
      info->last.configure_request.width = -1;
      info->last.configure_request.height = -1;
      /* be sure we reset geom hints on re-realize */
      info->last.flags = 0;
    }

  gsk_renderer_unrealize (priv->renderer);

  /* Icons */
  gtk_window_unrealize_icon (window);

  if (priv->title_box)
    gtk_widget_unrealize (priv->title_box);

  if (priv->child)
    gtk_widget_unrealize (priv->child);

  g_clear_object (&priv->renderer);

  surface = priv->surface;

  g_signal_handlers_disconnect_by_func (surface, surface_state_changed, widget);
  g_signal_handlers_disconnect_by_func (surface, surface_size_changed, widget);
  g_signal_handlers_disconnect_by_func (surface, surface_render, widget);
  g_signal_handlers_disconnect_by_func (surface, surface_event, widget);

  gtk_root_stop_layout (GTK_ROOT (window));

  GTK_WIDGET_CLASS (gtk_window_parent_class)->unrealize (widget);

  gdk_surface_set_widget (surface, NULL);
  gdk_surface_destroy (surface);
  g_clear_object (&priv->surface);
}

static void
update_window_style_classes (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget = GTK_WIDGET (window);
  guint edge_constraints;

  edge_constraints = priv->edge_constraints;

  if (!priv->edge_constraints)
    {
      if (priv->tiled)
        gtk_widget_add_css_class (widget, "titled");
      else
        gtk_widget_remove_css_class (widget, "tiled");
    }
  else
    {
      if (edge_constraints & GDK_SURFACE_STATE_TOP_TILED)
        gtk_widget_add_css_class (widget, "titled-top");
      else
        gtk_widget_remove_css_class (widget, "tiled-top");

      if (edge_constraints & GDK_SURFACE_STATE_RIGHT_TILED)
        gtk_widget_add_css_class (widget, "titled-right");
      else
        gtk_widget_remove_css_class (widget, "tiled-right");

      if (edge_constraints & GDK_SURFACE_STATE_BOTTOM_TILED)
        gtk_widget_add_css_class (widget, "titled-bottom");
      else
        gtk_widget_remove_css_class (widget, "tiled-bottom");

      if (edge_constraints & GDK_SURFACE_STATE_LEFT_TILED)
        gtk_widget_add_css_class (widget, "titled-left");
      else
        gtk_widget_remove_css_class (widget, "tiled-left");
    }

  if (priv->maximized)
    gtk_widget_add_css_class (widget, "maximized");
  else
    gtk_widget_remove_css_class (widget, "maximized");

  if (priv->fullscreen)
    gtk_widget_add_css_class (widget, "fullscreen");
  else
    gtk_widget_remove_css_class (widget, "fullscreen");
}

/* _gtk_window_set_allocation:
 * @window: a #GtkWindow
 * @allocation: the original allocation for the window
 * @allocation_out: @allocation taking decorations into
 * consideration
 *
 * This function is like gtk_widget_set_allocation()
 * but does the necessary extra work to update
 * the resize grip positioning, etc.
 *
 * Call this instead of gtk_widget_set_allocation()
 * when overriding ::size_allocate in a GtkWindow
 * subclass without chaining up.
 *
 * The @allocation parameter will be adjusted to
 * reflect any internal decorations that the window
 * may have. That revised allocation will then be
 * returned in the @allocation_out parameter.
 */
void
_gtk_window_set_allocation (GtkWindow           *window,
                            int                  width,
                            int                  height,
                            GtkAllocation       *allocation_out)
{
  GtkWidget *widget = (GtkWidget *)window;
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkAllocation child_allocation;
  GtkBorder window_border = { 0 };

  g_assert (allocation_out != NULL);

  child_allocation.x = 0;
  child_allocation.y = 0;
  child_allocation.width = width;
  child_allocation.height = height;

  get_shadow_width (window, &window_border);

  if (_gtk_widget_get_realized (widget))
    update_realized_window_properties (window, &child_allocation, &window_border);

  priv->title_height = 0;

  if (priv->title_box != NULL &&
      gtk_widget_get_visible (priv->title_box) &&
      gtk_widget_get_child_visible (priv->title_box) &&
      priv->decorated &&
      !priv->fullscreen)
    {
      GtkAllocation title_allocation;

      title_allocation.x = window_border.left;
      title_allocation.y = window_border.top;
      title_allocation.width = MAX (1, width - window_border.left - window_border.right);

      gtk_widget_measure (priv->title_box, GTK_ORIENTATION_VERTICAL,
                          title_allocation.width,
                          NULL, &priv->title_height,
                          NULL, NULL);

      title_allocation.height = priv->title_height;

      gtk_widget_size_allocate (priv->title_box, &title_allocation, -1);
    }

  if (priv->decorated &&
      !priv->fullscreen)
    {
      child_allocation.x += window_border.left;
      child_allocation.y += window_border.top + priv->title_height;
      child_allocation.width -= window_border.left + window_border.right;
      child_allocation.height -= window_border.top + window_border.bottom +
                                 priv->title_height;
    }

  *allocation_out = child_allocation;
}

static void
gtk_window_size_allocate (GtkWidget *widget,
                          int        width,
                          int        height,
                          int        baseline)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *child = priv->child;
  GtkAllocation child_allocation;

  _gtk_window_set_allocation (window, width, height, &child_allocation);

  if (child && gtk_widget_get_visible (child))
    gtk_widget_size_allocate (child, &child_allocation, -1);

  gtk_tooltip_maybe_allocate (GTK_NATIVE (widget));
}

gboolean
gtk_window_configure (GtkWindow *window,
                      guint      width,
                      guint      height)
{
  GtkAllocation allocation;
  GtkWidget *widget = GTK_WIDGET (window);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  check_scale_changed (window);

  /* If this is a gratuitous ConfigureNotify that's already
   * the same as our allocation, then we can fizzle it out.
   * This is the case for dragging windows around.
   *
   * We can't do this for a ConfigureRequest, since it might
   * have been a queued resize from child widgets, and so we
   * need to reallocate our children in case *they* changed.
   */
  gtk_widget_get_allocation (widget, &allocation);
  if (priv->configure_request_count == 0 &&
      (allocation.width == width && allocation.height == height))
    {
      return TRUE;
    }

  /* priv->configure_request_count incremented for each
   * configure request, and decremented to a min of 0 for
   * each configure notify.
   *
   * All it means is that we know we will get at least
   * priv->configure_request_count more configure notifies.
   * We could get more configure notifies than that; some
   * of the configure notifies we get may be unrelated to
   * the configure requests. But we will get at least
   * priv->configure_request_count notifies.
   */

  if (priv->configure_request_count > 0)
    {
      priv->configure_request_count -= 1;

      gdk_surface_thaw_toplevel_updates (priv->surface);
    }

  /*
   * If we do need to resize, we do that by:
   *   - setting configure_notify_received to TRUE
   *     for use in gtk_window_move_resize()
   *   - queueing a resize, leading to invocation of
   *     gtk_window_move_resize() in an idle handler
   *
   */
  
  priv->configure_notify_received = TRUE;

  gtk_widget_queue_allocate (widget);
  
  return TRUE;
}

static void
update_edge_constraints (GtkWindow      *window,
                         GdkSurfaceState  state)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  priv->edge_constraints = (state & GDK_SURFACE_STATE_TOP_TILED) |
                           (state & GDK_SURFACE_STATE_TOP_RESIZABLE) |
                           (state & GDK_SURFACE_STATE_RIGHT_TILED) |
                           (state & GDK_SURFACE_STATE_RIGHT_RESIZABLE) |
                           (state & GDK_SURFACE_STATE_BOTTOM_TILED) |
                           (state & GDK_SURFACE_STATE_BOTTOM_RESIZABLE) |
                           (state & GDK_SURFACE_STATE_LEFT_TILED) |
                           (state & GDK_SURFACE_STATE_LEFT_RESIZABLE);

  priv->tiled = (state & GDK_SURFACE_STATE_TILED) ? 1 : 0;
}

static void
surface_state_changed (GtkWidget *widget)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GdkSurfaceState new_surface_state;
  GdkSurfaceState changed_mask;

  new_surface_state = gdk_toplevel_get_state (GDK_TOPLEVEL (priv->surface));
  changed_mask = new_surface_state ^ priv->state;
  priv->state = new_surface_state;

  if (changed_mask & GDK_SURFACE_STATE_FOCUSED)
    {
      gboolean focused = new_surface_state & GDK_SURFACE_STATE_FOCUSED;

      ensure_state_flag_backdrop (widget);

      if (!focused)
        gtk_window_set_mnemonics_visible (window, FALSE);
    }

  if (changed_mask & GDK_SURFACE_STATE_FULLSCREEN)
    {
      priv->fullscreen =
        (new_surface_state & GDK_SURFACE_STATE_FULLSCREEN) ? 1 : 0;
    }

  if (changed_mask & GDK_SURFACE_STATE_MAXIMIZED)
    {
      priv->maximized =
        (new_surface_state & GDK_SURFACE_STATE_MAXIMIZED) ? 1 : 0;
      g_object_notify_by_pspec (G_OBJECT (widget), window_props[PROP_IS_MAXIMIZED]);
    }

  update_edge_constraints (window, new_surface_state);

  if (changed_mask & (GDK_SURFACE_STATE_FULLSCREEN |
                      GDK_SURFACE_STATE_MAXIMIZED |
                      GDK_SURFACE_STATE_TILED |
                      GDK_SURFACE_STATE_TOP_TILED |
                      GDK_SURFACE_STATE_RIGHT_TILED |
                      GDK_SURFACE_STATE_BOTTOM_TILED |
                      GDK_SURFACE_STATE_LEFT_TILED |
                      GDK_SURFACE_STATE_MINIMIZED))
    {
      update_window_style_classes (window);
      update_window_actions (window);
      gtk_widget_queue_resize (widget);
    }
}

static void
surface_size_changed (GtkWidget *widget,
                      int        width,
                      int        height)
{
  gtk_window_configure (GTK_WINDOW (widget), width, height);
}

static gboolean
surface_render (GdkSurface     *surface,
                cairo_region_t *region,
                GtkWidget      *widget)
{
  gtk_widget_render (widget, surface, region);

  return TRUE;
}

static gboolean
surface_event (GdkSurface *surface,
               GdkEvent   *event,
               GtkWidget  *widget)
{
  gtk_main_do_event (event);
  return TRUE;
}

static GtkWindowRegion
get_active_region_type (GtkWindow *window, gint x, gint y)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gint i;

  if (priv->client_decorated)
    {
      for (i = 0; i < 8; i++)
        {
          if (edge_under_coordinates (window, x, y, i))
            return i;
        }
    }

  return GTK_WINDOW_REGION_CONTENT;
}

static void
gtk_window_real_activate_focus (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->focus_widget && gtk_widget_is_sensitive (priv->focus_widget))
    gtk_widget_activate (priv->focus_widget);
}

static gboolean
gtk_window_has_mnemonic_modifier_pressed (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GList *seats, *s;
  gboolean retval = FALSE;

  seats = gdk_display_list_seats (gtk_widget_get_display (GTK_WIDGET (window)));

  for (s = seats; s; s = s->next)
    {
      GdkDevice *dev = gdk_seat_get_pointer (s->data);
      GdkModifierType mask;

      gdk_device_get_state (dev, priv->surface, NULL, &mask);
      if ((mask & gtk_accelerator_get_default_mod_mask ()) == GDK_ALT_MASK)
        {
          retval = TRUE;
          break;
        }
    }

  g_list_free (seats);

  return retval;
}

static gboolean
gtk_window_handle_focus (GtkWidget *widget,
                         GdkEvent  *event,
                         double     x,
                         double     y)
{
  GtkWindow *window = GTK_WINDOW (widget);

  if (gdk_event_get_event_type (event) != GDK_FOCUS_CHANGE)
    return FALSE;

  if (gdk_focus_event_get_in (event))
    {
      _gtk_window_set_is_active (window, TRUE);

      if (gtk_window_has_mnemonic_modifier_pressed (window))
        _gtk_window_schedule_mnemonics_visible (window);
    }
  else
    {
      _gtk_window_set_is_active (window, FALSE);

      gtk_window_set_mnemonics_visible (window, FALSE);
    }

  return TRUE;
}

static void
update_mnemonics_visible (GtkWindow       *window,
                          guint            keyval,
                          GdkModifierType  state,
                          gboolean         visible)
{
  if ((keyval == GDK_KEY_Alt_L || keyval == GDK_KEY_Alt_R) &&
      ((state & (gtk_accelerator_get_default_mod_mask ()) & ~(GDK_ALT_MASK)) == 0))
    {
      if (visible)
        _gtk_window_schedule_mnemonics_visible (window);
      else
        gtk_window_set_mnemonics_visible (window, FALSE);
    }
}

static void
update_focus_visible (GtkWindow       *window,
                      guint            keyval,
                      GdkModifierType  state,
                      gboolean         visible)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (visible)
    {
      if (priv->focus_visible)
        priv->key_press_focus = NULL;
      else
        priv->key_press_focus = priv->focus_widget;

      if ((keyval == GDK_KEY_Alt_L || keyval == GDK_KEY_Alt_R) &&
               ((state & (gtk_accelerator_get_default_mod_mask ()) & ~(GDK_ALT_MASK)) == 0))
        gtk_window_set_focus_visible (window, TRUE);
    }
  else
    {
      if (priv->key_press_focus == priv->focus_widget)
        gtk_window_set_focus_visible (window, FALSE);
      else
        gtk_window_set_focus_visible (window, TRUE);

      priv->key_press_focus = NULL;
    }
}

static gboolean
gtk_window_key_pressed (GtkWidget       *widget,
                        guint            keyval,
                        guint            keycode,
                        GdkModifierType  state,
                        gpointer         data)
{
  GtkWindow *window = GTK_WINDOW (widget);

  update_focus_visible (window, keyval, state, TRUE);
  update_mnemonics_visible (window, keyval, state, TRUE);

  return FALSE;
}

static gboolean
gtk_window_key_released (GtkWidget       *widget,
                         guint            keyval,
                         guint            keycode,
                         GdkModifierType  state,
                         gpointer         data)
{
  GtkWindow *window = GTK_WINDOW (widget);

  update_focus_visible (window, keyval, state, FALSE);
  update_mnemonics_visible (window, keyval, state, FALSE);

  return FALSE;
}

void
gtk_window_check_resize (GtkWindow *self)
{
  GtkWidget *widget = GTK_WIDGET (self);
  gint64 before = g_get_monotonic_time ();

  if (!_gtk_widget_get_alloc_needed (widget))
    gtk_widget_ensure_allocate (widget);
  else if (gtk_widget_get_visible (widget))
    gtk_window_move_resize (self);

  if (GDK_PROFILER_IS_RUNNING)
    gdk_profiler_end_mark (before, "size allocation", "");
}

static gboolean
gtk_window_focus (GtkWidget        *widget,
                  GtkDirectionType  direction)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *child;
  GtkWidget *old_focus_child;
  GtkWidget *parent;

  old_focus_child = gtk_widget_get_focus_child (widget);

  /* We need a special implementation here to deal properly with wrapping
   * around in the tab chain without the danger of going into an
   * infinite loop.
   */
  if (old_focus_child)
    {
      if (gtk_widget_child_focus (old_focus_child, direction))
        return TRUE;
    }

  if (priv->focus_widget)
    {
      if (direction == GTK_DIR_LEFT ||
          direction == GTK_DIR_RIGHT ||
          direction == GTK_DIR_UP ||
          direction == GTK_DIR_DOWN)
        {
          return FALSE;
        }

      /* Wrapped off the end, clear the focus setting for the toplpevel */
      parent = _gtk_widget_get_parent (priv->focus_widget);
      while (parent)
        {
          gtk_widget_set_focus_child (parent, NULL);
          parent = _gtk_widget_get_parent (parent);
        }

      gtk_window_set_focus (window, NULL);
    }

  /* Now try to focus the first widget in the window,
   * taking care to hook titlebar widgets into the
   * focus chain.
  */
  if (priv->title_box != NULL &&
      old_focus_child != NULL &&
      priv->title_box != old_focus_child)
    child = priv->title_box;
  else
    child = priv->child;

  if (child)
    {
      if (gtk_widget_child_focus (child, direction))
        return TRUE;
      else if (priv->title_box != NULL &&
               priv->title_box != child &&
               gtk_widget_child_focus (priv->title_box, direction))
        return TRUE;
      else if (priv->title_box == child &&
               gtk_widget_child_focus (priv->child, direction))
        return TRUE;
    }

  return FALSE;
}

static void
gtk_window_move_focus (GtkWidget        *widget,
                       GtkDirectionType  dir)
{
  gtk_widget_child_focus (widget, dir);

  if (!gtk_widget_get_focus_child (widget))
    gtk_window_set_focus (GTK_WINDOW (widget), NULL);
}

void
check_crossing_invariants (GtkWidget *widget,
                           GtkCrossingData *crossing)
{
#ifdef G_ENBABLE_DEBUG
  if (crossing->old_target == NULL)
    g_assert (crossing->old_descendent == NULL);
  else if (crossing->old_descendent == NULL)
    g_assert (crossing->old_target == widget || !gtk_widget_is_ancestor (crossing->old_target, widget));
  else
    {
      g_assert (gtk_widget_get_parent (crossing->old_descendent) == widget);
      g_assert (gtk_widget_is_ancestor (crossing->old_descendent, widget));
      g_assert (crossing->old_target == crossing->old_descendent || gtk_widget_is_ancestor (crossing->old_target, crossing->old_descendent));
    }
  if (crossing->new_target == NULL)
    g_assert (crossing->new_descendent == NULL);
  else if (crossing->new_descendent == NULL)
    g_assert (crossing->new_target == widget || !gtk_widget_is_ancestor (crossing->new_target, widget));
  else
    {
      g_assert (gtk_widget_get_parent (crossing->new_descendent) == widget);
      g_assert (gtk_widget_is_ancestor (crossing->new_descendent, widget));
      g_assert (crossing->new_target == crossing->new_descendent || gtk_widget_is_ancestor (crossing->new_target, crossing->new_descendent));
    }
#endif
}

static void
synthesize_focus_change_events (GtkWindow *window,
                                GtkWidget *old_focus,
                                GtkWidget *new_focus)
{
  GtkCrossingData crossing;
  GtkWidget *ancestor;
  GtkWidget *widget, *focus_child;
  GList *list, *l;
  GtkStateFlags flags;
  GtkWidget *prev;
  gboolean seen_ancestor;

  if (old_focus && new_focus)
    ancestor = gtk_widget_common_ancestor (old_focus, new_focus);
  else
    ancestor = NULL;

  flags = GTK_STATE_FLAG_FOCUSED | GTK_STATE_FLAG_FOCUS_WITHIN;
  if (gtk_window_get_focus_visible (GTK_WINDOW (window)))
    flags |= GTK_STATE_FLAG_FOCUS_VISIBLE;

  crossing.type = GTK_CROSSING_FOCUS;
  crossing.mode = GDK_CROSSING_NORMAL;
  crossing.old_target = old_focus;
  crossing.old_descendent = NULL;
  crossing.new_target = new_focus;
  crossing.new_descendent = NULL;

  crossing.direction = GTK_CROSSING_OUT;

  prev = NULL;
  seen_ancestor = FALSE;
  widget = old_focus;
  while (widget)
    {
      crossing.old_descendent = prev;
      if (seen_ancestor)
        {
          crossing.new_descendent = new_focus ? prev : NULL;
        }
      else if (widget == ancestor)
        {
          GtkWidget *w;

          crossing.new_descendent = NULL;
          for (w = new_focus; w != ancestor; w = gtk_widget_get_parent (w))
            crossing.new_descendent = w;

          seen_ancestor = TRUE;
        }
      else
        {
          crossing.new_descendent = NULL;
        }
      
      check_crossing_invariants (widget, &crossing);
      gtk_widget_handle_crossing (widget, &crossing, 0, 0);
      gtk_widget_unset_state_flags (widget, flags);
      gtk_widget_set_focus_child (widget, NULL);
      prev = widget;
      widget = gtk_widget_get_parent (widget);

      flags = flags & ~GTK_STATE_FLAG_FOCUSED;
    }

  flags = GTK_STATE_FLAG_FOCUS_WITHIN;
  if (gtk_window_get_focus_visible (GTK_WINDOW (window)))
    flags |= GTK_STATE_FLAG_FOCUS_VISIBLE;

  list = NULL;
  for (widget = new_focus; widget; widget = gtk_widget_get_parent (widget))
    list = g_list_prepend (list, widget);

  crossing.direction = GTK_CROSSING_IN;

  seen_ancestor = FALSE;
  for (l = list; l; l = l->next)
    {
      widget = l->data;
      if (l->next)
        focus_child = l->next->data;
      else
        focus_child = NULL;

      crossing.new_descendent = focus_child;
      if (seen_ancestor)
        {
          crossing.old_descendent = NULL;
        }
      else if (widget == ancestor)
        {
          GtkWidget *w;

          crossing.old_descendent = NULL;
          for (w = old_focus; w != ancestor; w = gtk_widget_get_parent (w))
            {
              crossing.old_descendent = w;
            }

          seen_ancestor = TRUE;
        }
      else
        {
          crossing.old_descendent = old_focus ? focus_child : NULL;
        }
      check_crossing_invariants (widget, &crossing);
      gtk_widget_handle_crossing (widget, &crossing, 0, 0);

      if (l->next == NULL)
        flags = flags | GTK_STATE_FLAG_FOCUSED;

      gtk_widget_set_state_flags (widget, flags, FALSE);
      gtk_widget_set_focus_child (widget, focus_child);
    }

  g_list_free (list);
}

/**
 * gtk_window_set_focus:
 * @window: a #GtkWindow
 * @focus: (allow-none): widget to be the new focus widget, or %NULL to unset
 *   any focus widget for the toplevel window.
 *
 * If @focus is not the current focus widget, and is focusable, sets
 * it as the focus widget for the window. If @focus is %NULL, unsets
 * the focus widget for this window. To set the focus to a particular
 * widget in the toplevel, it is usually more convenient to use
 * gtk_widget_grab_focus() instead of this function.
 **/
void
gtk_window_set_focus (GtkWindow *window,
                      GtkWidget *focus)
{
  g_return_if_fail (GTK_IS_WINDOW (window));

  if (focus)
    gtk_widget_grab_focus (focus);
  else
    gtk_window_root_set_focus (GTK_ROOT (window), NULL);
}

static void
gtk_window_state_flags_changed (GtkWidget     *widget,
                                GtkStateFlags  previous_state)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkStateFlags state;

  state = gtk_widget_get_state_flags (widget);
  gtk_css_node_set_state (priv->decoration_node, state);

  GTK_WIDGET_CLASS (gtk_window_parent_class)->state_flags_changed (widget, previous_state);
}

static void
gtk_window_css_changed (GtkWidget         *widget,
                        GtkCssStyleChange *change)
{
  GtkWindow *window = GTK_WINDOW (widget);

  GTK_WIDGET_CLASS (gtk_window_parent_class)->css_changed (widget, change);

  if (!_gtk_widget_get_alloc_needed (widget) &&
      (change == NULL || gtk_css_style_change_changes_property (change, GTK_CSS_PROPERTY_BACKGROUND_COLOR)))
    {
      GtkAllocation allocation;
      GtkBorder window_border;

      gtk_widget_get_allocation (widget, &allocation);
      get_shadow_width (window, &window_border);

      update_opaque_region (window, &window_border, &allocation);
    }
}

/**
 * _gtk_window_unset_focus_and_default:
 * @window: a #GtkWindow
 * @widget: a widget inside of @window
 * 
 * Checks whether the focus and default widgets of @window are
 * @widget or a descendent of @widget, and if so, unset them.
 **/
void
_gtk_window_unset_focus_and_default (GtkWindow *window,
				     GtkWidget *widget)

{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *child;
  GtkWidget *parent;

  g_object_ref (window);
  g_object_ref (widget);

  parent = _gtk_widget_get_parent (widget);
  if (gtk_widget_get_focus_child (parent) == widget)
    {
      child = priv->focus_widget;
      
      while (child && child != widget)
        child = _gtk_widget_get_parent (child);

      if (child == widget)
        {
          GtkWidget *new_focus;

          if (GTK_IS_NATIVE (widget))
            new_focus = gtk_widget_get_parent (widget);
          else
            new_focus = NULL;

	  gtk_window_set_focus (GTK_WINDOW (window), new_focus);
        }
    }
      
  child = priv->default_widget;
      
  while (child && child != widget)
    child = _gtk_widget_get_parent (child);

  if (child == widget)
    gtk_window_set_default_widget (window, NULL);
  
  g_object_unref (widget);
  g_object_unref (window);
}

/*********************************
 * Functions related to resizing *
 *********************************/

/* This function doesn't constrain to geometry hints */
static void
gtk_window_compute_configure_request_size (GtkWindow   *window,
                                           GdkGeometry *geometry,
                                           guint        flags,
                                           gint        *width,
                                           gint        *height)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWindowGeometryInfo *info;
  int w, h;

  /* Preconditions:
   *  - we've done a size request
   */
  
  info = gtk_window_get_geometry_info (window, FALSE);

  if (priv->need_default_size)
    {
      gtk_window_guess_default_size (window, width, height);
      gtk_window_get_remembered_size (window, &w, &h);
      *width = MAX (*width, w);
      *height = MAX (*height, h);

      /* Override with default size */
      if (info)
        {
          /* Take width of shadows/headerbar into account. We want to set the
           * default size of the content area and not the window area.
           */
          gint default_width_csd = info->default_width;
          gint default_height_csd = info->default_height;
          gtk_window_update_csd_size (window,
                                      &default_width_csd, &default_height_csd,
                                      INCLUDE_CSD_SIZE);

          if (info->default_width > 0)
            *width = default_width_csd;
          if (info->default_height > 0)
            *height = default_height_csd;
        }
    }
  else
    {
      /* Default to keeping current size */
      gtk_window_get_remembered_size (window, width, height);
    }

  /* Override any size with gtk_window_resize() values */
  if (priv->maximized || priv->fullscreen)
    {
      /* Unless we are maximized or fullscreen */
      gtk_window_get_remembered_size (window, width, height);
    }
  else if (info)
    {
      gint resize_width_csd = info->resize_width;
      gint resize_height_csd = info->resize_height;
      gtk_window_update_csd_size (window,
                                  &resize_width_csd, &resize_height_csd,
                                  INCLUDE_CSD_SIZE);

      if (info->resize_width > 0)
        *width = resize_width_csd;
      if (info->resize_height > 0)
        *height = resize_height_csd;
    }

  /* Don't ever request zero width or height, it's not supported by
     gdk. The size allocation code will round it to 1 anyway but if
     we do it then the value returned from this function will is
     not comparable to the size allocation read from the GtkWindow. */
  *width = MAX (*width, 1);
  *height = MAX (*height, 1);
}

static void
gtk_window_compute_configure_request (GtkWindow    *window,
                                      GdkRectangle *request,
                                      GdkGeometry  *geometry,
                                      guint        *flags)
{
  GdkGeometry new_geometry;
  guint new_flags;
  int w, h;
  GtkWindowGeometryInfo *info;
  int x, y;

  gtk_window_compute_hints (window, &new_geometry, &new_flags);
  gtk_window_compute_configure_request_size (window,
                                             &new_geometry, new_flags,
                                             &w, &h);
  gtk_window_update_fixed_size (window, &new_geometry, w, h);
  gtk_window_constrain_size (window,
                             &new_geometry, new_flags,
                             w, h,
                             &w, &h);

  info = gtk_window_get_geometry_info (window, FALSE);

  /* by default, don't change position requested */
  if (info)
    {
      x = info->last.configure_request.x;
      y = info->last.configure_request.y;
    }
  else
    {
      x = 0;
      y = 0;
    }

  request->x = x;
  request->y = y;
  request->width = w;
  request->height = h;

  if (geometry)
    *geometry = new_geometry;
  if (flags)
    *flags = new_flags;
}

static void
gtk_window_move_resize (GtkWindow *window)
{
  /* Overview:
   *
   * First we determine whether any information has changed that would
   * cause us to revise our last configure request.  If we would send
   * a different configure request from last time, then
   * configure_request_size_changed = TRUE or
   * configure_request_pos_changed = TRUE. configure_request_size_changed
   * may be true due to new hints, a gtk_window_resize(), or whatever.
   * configure_request_pos_changed may be true due to gtk_window_set_position()
   * or gtk_window_move().
   *
   * If the configure request has changed, we send off a new one.  To
   * ensure GTK+ invariants are maintained (resize queue does what it
   * should), we go ahead and size_allocate the requested size in this
   * function.
   *
   * If the configure request has not changed, we don't ever resend
   * it, because it could mean fighting the user or window manager.
   *
   *   To prepare the configure request, we come up with a base size/pos:
   *      - the one from gtk_window_move()/gtk_window_resize()
   *      - else default_width, default_height if we haven't ever
   *        been mapped
   *      - else the size request if we haven't ever been mapped,
   *        as a substitute default size
   *      - else the current size of the window, as received from
   *        configure notifies (i.e. the current allocation)
   */
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget;
  GtkWindowGeometryInfo *info;
  GdkGeometry new_geometry;
  guint new_flags;
  GdkRectangle new_request;
  gboolean configure_request_size_changed;
  gboolean configure_request_pos_changed;
  gboolean hints_changed; /* do we need to send these again */
  GtkWindowLastGeometryInfo saved_last_info;
  int current_width, current_height;

  widget = GTK_WIDGET (window);

  info = gtk_window_get_geometry_info (window, TRUE);

  configure_request_size_changed = FALSE;
  configure_request_pos_changed = FALSE;
  hints_changed = FALSE;

  gtk_window_compute_configure_request (window, &new_request,
                                        &new_geometry, &new_flags);

  if (!(new_flags & GDK_HINT_MIN_SIZE))
    new_geometry.min_width = new_geometry.min_height = 1;

  g_clear_pointer (&priv->layout, gdk_toplevel_layout_unref);
  priv->layout = gtk_window_compute_layout (window, new_geometry.min_width, new_geometry.min_height);


  /* This check implies the invariant that we never set info->last
   * without setting the hints and sending off a configure request.
   *
   * If we change info->last without sending the request, we may
   * miss a request.
   */
  if (info->last.configure_request.x != new_request.x ||
      info->last.configure_request.y != new_request.y)
    configure_request_pos_changed = TRUE;

  if ((info->last.configure_request.width != new_request.width ||
       info->last.configure_request.height != new_request.height))
    configure_request_size_changed = TRUE;

  if (!gtk_window_compare_hints (&info->last.geometry, info->last.flags,
				 &new_geometry, new_flags))
    hints_changed = TRUE;

#if 0
    {
      GtkAllocation alloc;

      gtk_widget_get_allocation (widget, &alloc);

      g_message ("--- %s ---\n"
		 "last  : %d,%d\t%d x %d\n"
		 "this  : %d,%d\t%d x %d\n"
		 "alloc : %d,%d\t%d x %d\n"
		 "resize:      \t%d x %d\n" 
		 "size_changed: %d pos_changed: %d hints_changed: %d\n"
		 "configure_notify_received: %d\n"
		 "configure_request_count: %d\n"
		 "position_constraints_changed: %d",
		 priv->title ? priv->title : "(no title)",
		 info->last.configure_request.x,
		 info->last.configure_request.y,
		 info->last.configure_request.width,
		 info->last.configure_request.height,
		 new_request.x,
		 new_request.y,
		 new_request.width,
		 new_request.height,
		 alloc.x,
		 alloc.y,
		 alloc.width,
		 alloc.height,
		 info->resize_width,
		 info->resize_height,
		 configure_request_size_changed,
		 configure_request_pos_changed,
		 hints_changed,
		 priv->configure_notify_received,
		 priv->configure_request_count,
		 info->position_constraints_changed);
    }
#endif
  
  saved_last_info = info->last;
  info->last.geometry = new_geometry;
  info->last.flags = new_flags;
  info->last.configure_request = new_request;

  /* need to set PPosition so the WM will look at our position,
   * but we don't want to count PPosition coming and going as a hints
   * change for future iterations. So we saved info->last prior to
   * this.
   */

  /* Also, if the initial position was explicitly set, then we always
   * toggle on PPosition. This makes gtk_window_move(window, 0, 0)
   * work.
   */

  if (configure_request_pos_changed)
    {
      new_flags |= GDK_HINT_POS;
      hints_changed = TRUE;
    }

  current_width = gdk_surface_get_width (priv->surface);
  current_height = gdk_surface_get_height (priv->surface);

  /* handle resizing/moving and widget tree allocation
   */
  if (priv->configure_notify_received)
    {
      GtkAllocation allocation;
      int min;

      /* If we have received a configure event since
       * the last time in this function, we need to
       * accept our new size and size_allocate child widgets.
       * (see gtk_window_configure_event() for more details).
       *
       * 1 or more configure notifies may have been received.
       * Also, configure_notify_received will only be TRUE
       * if all expected configure notifies have been received
       * (one per configure request), as an optimization.
       *
       */
      priv->configure_notify_received = FALSE;

      allocation.x = 0;
      allocation.y = 0;

      gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
                          &min, NULL, NULL, NULL);
      allocation.width = MAX (min, current_width);
      gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL, allocation.width,
                          &min, NULL, NULL, NULL);
      allocation.height = MAX (min, current_height);

      gtk_widget_size_allocate (widget, &allocation, -1);

      /* If the configure request changed, it means that
       * we either:
       *   1) coincidentally changed hints or widget properties
       *      impacting the configure request before getting
       *      a configure notify, or
       *   2) some broken widget is changing its size request
       *      during size allocation, resulting in
       *      a false appearance of changed configure request.
       *
       * For 1), we could just go ahead and ask for the
       * new size right now, but doing that for 2)
       * might well be fighting the user (and can even
       * trigger a loop). Since we really don't want to
       * do that, we requeue a resize in hopes that
       * by the time it gets handled, the child has seen
       * the light and is willing to go along with the
       * new size. (this happens for the zvt widget, since
       * the size_allocate() above will have stored the
       * requisition corresponding to the new size in the
       * zvt widget)
       *
       * This doesn't buy us anything for 1), but it shouldn't
       * hurt us too badly, since it is what would have
       * happened if we had gotten the configure event before
       * the new size had been set.
       */

      if (configure_request_size_changed ||
          configure_request_pos_changed)
        {
          /* Don't change the recorded last info after all, because we
           * haven't actually updated to the new info yet - we decided
           * to postpone our configure request until later.
           */
	  info->last = saved_last_info;
          g_clear_pointer (&priv->layout, gdk_toplevel_layout_unref);
	  gtk_widget_queue_resize (widget); /* might recurse for GTK_RESIZE_IMMEDIATE */
	}

      return;			/* Bail out, we didn't really process the move/resize */
    }
  else if ((configure_request_size_changed || hints_changed) &&
           (current_width != new_request.width || current_height != new_request.height))
    {
      /* We are in one of the following situations:
       * A. configure_request_size_changed
       *    our requisition has changed and we need a different window size,
       *    so we request it from the window manager.
       * B. !configure_request_size_changed && hints_changed
       *    the window manager rejects our size, but we have just changed the
       *    window manager hints, so there's a chance our request will
       *    be honoured this time, so we try again.
       *
       * However, if the new requisition is the same as the current allocation,
       * we don't request it again, since we won't get a ConfigureNotify back from
       * the window manager unless it decides to change our requisition. If
       * we don't get the ConfigureNotify back, the resize queue will never be run.
       */

      /* Increment the number of have-not-yet-received-notify requests.
       * This is done before gdk_surface[_move]_resize(), because
       * that call might be synchronous (depending on which GDK backend
       * is being used), so any preparations for its effects must
       * be done beforehand.
       */
      priv->configure_request_count += 1;

      gdk_surface_freeze_toplevel_updates (priv->surface);

      /* for GTK_RESIZE_QUEUE toplevels, we are now awaiting a new
       * configure event in response to our resizing request.
       * the configure event will cause a new resize with
       * ->configure_notify_received=TRUE.
       * until then, we want to
       * - discard expose events
       * - coalesce resizes for our children
       * - defer any window resizes until the configure event arrived
       * to achieve this, we queue a resize for the window, but remove its
       * resizing handler, so resizing will not be handled from the next
       * idle handler but when the configure event arrives.
       *
       * FIXME: we should also dequeue the pending redraws here, since
       * we handle those ourselves upon ->configure_notify_received==TRUE.
       */

      /* Now send the configure request */
      if (configure_request_pos_changed)
        g_warning ("configure request position changed. This should not happen. Ignoring the position");

      gdk_toplevel_present (GDK_TOPLEVEL (priv->surface),
			    new_request.width, new_request.height,
                            priv->layout);
    }
  else
    {
      GtkAllocation allocation;
      int min_width, min_height;

      /* Handle any position changes.
       */
      if (configure_request_pos_changed)
        g_warning ("configure request position changed. This should not happen. Ignoring the position");

      gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL, current_height,
                          &min_width, NULL, NULL, NULL);
      gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL, current_width,
                          &min_height, NULL, NULL, NULL);

      /* Our configure request didn't change size, but maybe some of
       * our child widgets have. Run a size allocate with our current
       * size to make sure that we re-layout our child widgets. */
      allocation.x = 0;
      allocation.y = 0;
      allocation.width = MAX (current_width, min_width);
      allocation.height = MAX (current_height, min_height);

      gtk_widget_size_allocate (widget, &allocation, -1);
    }

  info->resize_width = -1;
  info->resize_height = -1;
}

/* Compare two sets of Geometry hints for equality.
 */
static gboolean
gtk_window_compare_hints (GdkGeometry *geometry_a,
			  guint        flags_a,
			  GdkGeometry *geometry_b,
			  guint        flags_b)
{
  if (flags_a != flags_b)
    return FALSE;
  
  if ((flags_a & GDK_HINT_MIN_SIZE) &&
      (geometry_a->min_width != geometry_b->min_width ||
       geometry_a->min_height != geometry_b->min_height))
    return FALSE;

  if ((flags_a & GDK_HINT_MAX_SIZE) &&
      (geometry_a->max_width != geometry_b->max_width ||
       geometry_a->max_height != geometry_b->max_height))
    return FALSE;

  if ((flags_a & GDK_HINT_BASE_SIZE) &&
      (geometry_a->base_width != geometry_b->base_width ||
       geometry_a->base_height != geometry_b->base_height))
    return FALSE;

  if ((flags_a & GDK_HINT_ASPECT) &&
      (geometry_a->min_aspect != geometry_b->min_aspect ||
       geometry_a->max_aspect != geometry_b->max_aspect))
    return FALSE;

  if ((flags_a & GDK_HINT_RESIZE_INC) &&
      (geometry_a->width_inc != geometry_b->width_inc ||
       geometry_a->height_inc != geometry_b->height_inc))
    return FALSE;

  if ((flags_a & GDK_HINT_WIN_GRAVITY) &&
      geometry_a->win_gravity != geometry_b->win_gravity)
    return FALSE;

  return TRUE;
}

static void 
gtk_window_constrain_size (GtkWindow   *window,
			   GdkGeometry *geometry,
			   guint        flags,
			   gint         width,
			   gint         height,
			   gint        *new_width,
			   gint        *new_height)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  guint geometry_flags;

  /* ignore size increments for windows that fit in a fixed space */
  if (priv->maximized || priv->fullscreen || priv->tiled)
    geometry_flags = flags & ~GDK_HINT_RESIZE_INC;
  else
    geometry_flags = flags;

  gdk_surface_constrain_size (geometry, geometry_flags, width, height,
			      new_width, new_height);
}

/* For non-resizable windows, make sure the given width/height fits
 * in the geometry contrains and update the geometry hints to match
 * the given width/height if not.
 * This is to make sure that non-resizable windows get the default
 * width/height if set, but can still grow if their content requires.
 *
 * Note: Fixed size windows with a default size set will not shrink
 * smaller than the default size when their content requires less size.
 */
static void
gtk_window_update_fixed_size (GtkWindow   *window,
                              GdkGeometry *new_geometry,
                              gint         new_width,
                              gint         new_height)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWindowGeometryInfo *info;
  gboolean has_size_request;

  /* Adjust the geometry hints for non-resizable windows only */
  has_size_request = gtk_widget_has_size_request (GTK_WIDGET (window));
  if (priv->resizable || has_size_request)
    return;

  info = gtk_window_get_geometry_info (window, FALSE);
  if (info)
    {
      gint default_width_csd = info->default_width;
      gint default_height_csd = info->default_height;

      gtk_window_update_csd_size (window,
                                  &default_width_csd, &default_height_csd,
                                  INCLUDE_CSD_SIZE);

      if (info->default_width > -1)
        {
          gint w = MAX (MAX (default_width_csd, new_width), new_geometry->min_width);
          new_geometry->min_width = w;
          new_geometry->max_width = w;
        }

      if (info->default_height > -1)
        {
          gint h = MAX (MAX (default_height_csd, new_height), new_geometry->min_height);
          new_geometry->min_height = h;
          new_geometry->max_height = h;
        }
    }
}

/* Compute the set of geometry hints and flags for a window
 * based on the application set geometry, and requisition
 * of the window. gtk_widget_get_preferred_size() must have been
 * called first.
 */
static void
gtk_window_compute_hints (GtkWindow   *window,
			  GdkGeometry *new_geometry,
			  guint       *new_flags)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget;
  GtkRequisition requisition;

  widget = GTK_WIDGET (window);

  /* Use a good size for unresizable widgets, otherwise the minimum one. */
  if (priv->resizable)
    gtk_widget_get_preferred_size (widget, &requisition, NULL);
  else
    gtk_window_guess_default_size (window, &requisition.width, &requisition.height);

  /* We don't want to set GDK_HINT_POS in here, we just set it
   * in gtk_window_move_resize() when we want the position
   * honored.
   */
  *new_flags = 0;
  
  /* For simplicity, we always set the base hint, even when we
   * don't expect it to have any visible effect.
   * (Note: geometry_size_to_pixels() depends on this.)
   */
  *new_flags |= GDK_HINT_BASE_SIZE;
  new_geometry->base_width = 0;
  new_geometry->base_height = 0;

  *new_flags |= GDK_HINT_MIN_SIZE;
  new_geometry->min_width = requisition.width;
  new_geometry->min_height = requisition.height;
  
  if (!priv->resizable)
    {
      *new_flags |= GDK_HINT_MAX_SIZE;

      new_geometry->max_width = new_geometry->min_width;
      new_geometry->max_height = new_geometry->min_height;
    }

  *new_flags |= GDK_HINT_WIN_GRAVITY;
  new_geometry->win_gravity = priv->gravity;
}

#undef INCLUDE_CSD_SIZE
#undef EXCLUDE_CSD_SIZE

/***********************
 * Redrawing functions *
 ***********************/

static void
gtk_window_snapshot (GtkWidget   *widget,
                     GtkSnapshot *snapshot)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (GTK_WINDOW (widget));
  GtkStyleContext *context;
  GtkBorder window_border;
  gint title_height;
  int width, height;
  GtkWidget *child;

  context = gtk_widget_get_style_context (widget);

  get_shadow_width (GTK_WINDOW (widget), &window_border);
  width = gtk_widget_get_width (widget);
  height = gtk_widget_get_height (widget);

  if (priv->client_decorated &&
      priv->decorated &&
      !priv->fullscreen &&
      !priv->maximized)
    {
      gtk_style_context_save_to_node (context, priv->decoration_node);

      if (priv->use_client_shadow)
        {
          GtkBorder padding, border;

          gtk_style_context_get_padding (context, &padding);
          gtk_style_context_get_border (context, &border);
          sum_borders (&border, &padding);

          gtk_snapshot_render_background (snapshot, context,
                                          window_border.left - border.left, window_border.top - border.top,
                                          width -
                                            (window_border.left + window_border.right - border.left - border.right),
                                          height -
                                            (window_border.top + window_border.bottom - border.top - border.bottom));
          gtk_snapshot_render_frame (snapshot, context,
                                     window_border.left - border.left, window_border.top - border.top,
                                     width -
                                       (window_border.left + window_border.right - border.left - border.right),
                                     height -
                                       (window_border.top + window_border.bottom - border.top - border.bottom));
        }
      else
        {
          gtk_snapshot_render_background (snapshot, context, 0, 0,
                                          width, height);

          gtk_snapshot_render_frame (snapshot, context, 0, 0,
                                     width, height);
        }
      gtk_style_context_restore (context);
    }

  if (priv->title_box &&
      gtk_widget_get_visible (priv->title_box) &&
      gtk_widget_get_child_visible (priv->title_box))
    title_height = priv->title_height;
  else
    title_height = 0;

  gtk_snapshot_render_background (snapshot, context,
                                  window_border.left,
                                  window_border.top + title_height,
                                  width -
                                    (window_border.left + window_border.right),
                                  height -
                                    (window_border.top + window_border.bottom + title_height));
  gtk_snapshot_render_frame (snapshot, context,
                             window_border.left,
                             window_border.top + title_height,
                             width -
                               (window_border.left + window_border.right),
                             height -
                               (window_border.top + window_border.bottom + title_height));

  for (child = _gtk_widget_get_first_child (widget);
       child != NULL;
       child = _gtk_widget_get_next_sibling (child))
    {
      /* Handle popovers separately until their stacking order is fixed */
      if (!GTK_IS_POPOVER (child))
        gtk_widget_snapshot_child (widget, child, snapshot);
    }
}

/**
 * gtk_window_present:
 * @window: a #GtkWindow
 *
 * Presents a window to the user. This function should not be used
 * as when it is called, it is too late to gather a valid timestamp
 * to allow focus stealing prevention to work correctly.
 **/
void
gtk_window_present (GtkWindow *window)
{
  gtk_window_present_with_time (window, GDK_CURRENT_TIME);
}

/**
 * gtk_window_present_with_time:
 * @window: a #GtkWindow
 * @timestamp: the timestamp of the user interaction (typically a 
 *   button or key press event) which triggered this call
 *
 * Presents a window to the user. This may mean raising the window
 * in the stacking order, unminimizing it, moving it to the current
 * desktop, and/or giving it the keyboard focus, possibly dependent
 * on the user’s platform, window manager, and preferences.
 *
 * If @window is hidden, this function calls gtk_widget_show()
 * as well.
 *
 * This function should be used when the user tries to open a window
 * that’s already open. Say for example the preferences dialog is
 * currently open, and the user chooses Preferences from the menu
 * a second time; use gtk_window_present() to move the already-open dialog
 * where the user can see it.
 *
 * Presents a window to the user in response to a user interaction. The
 * timestamp should be gathered when the window was requested to be shown
 * (when clicking a link for example), rather than once the window is
 * ready to be shown.
 **/
void
gtk_window_present_with_time (GtkWindow *window,
			      guint32    timestamp)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget;
  GdkSurface *surface;

  g_return_if_fail (GTK_IS_WINDOW (window));

  widget = GTK_WIDGET (window);

  if (gtk_widget_get_visible (widget))
    {
      surface = priv->surface;

      g_assert (surface != NULL);

      gtk_window_present_toplevel (window);

      /* Translate a timestamp of GDK_CURRENT_TIME appropriately */
      if (timestamp == GDK_CURRENT_TIME)
        {
#ifdef GDK_WINDOWING_X11
	  if (GDK_IS_X11_SURFACE (surface))
	    {
	      GdkDisplay *display;

	      display = gtk_widget_get_display (widget);
	      timestamp = gdk_x11_display_get_user_time (display);
	    }
	  else
#endif
	    timestamp = gtk_get_current_event_time ();
        }

      gdk_toplevel_focus (GDK_TOPLEVEL (surface), timestamp);
    }
  else
    {
      priv->initial_timestamp = timestamp;
      gtk_widget_show (widget);
    }
}

/**
 * gtk_window_minimize:
 * @window: a #GtkWindow
 *
 * Asks to minimize the specified @window.
 *
 * Note that you shouldn’t assume the window is definitely minimized
 * afterward, because the windowing system might not support this
 * functionality; other entities (e.g. the user or the [window manager][gtk-X11-arch])
 * could unminimize it again, or there may not be a window manager in
 * which case minimization isn’t possible, etc.
 *
 * It’s permitted to call this function before showing a window,
 * in which case the window will be minimized before it ever appears
 * onscreen.
 *
 * You can track result of this operation via the #GdkToplevel:state
 * property.
 */
void
gtk_window_minimize (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  priv->minimize_initially = TRUE;

  if (priv->surface)
    gdk_toplevel_minimize (GDK_TOPLEVEL (priv->surface));
}

/**
 * gtk_window_unminimize:
 * @window: a #GtkWindow
 *
 * Asks to unminimize the specified @window.
 *
 * Note that you shouldn’t assume the window is definitely unminimized
 * afterward, because the windowing system might not support this
 * functionality; other entities (e.g. the user or the [window manager][gtk-X11-arch])
 * could minimize it again, or there may not be a window manager in
 * which case minimization isn’t possible, etc.
 *
 * You can track result of this operation via the #GdkToplevel:state
 * property.
 */
void
gtk_window_unminimize (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  priv->minimize_initially = FALSE;

  gtk_window_update_toplevel (window);
}

/**
 * gtk_window_maximize:
 * @window: a #GtkWindow
 *
 * Asks to maximize @window, so that it becomes full-screen. Note that
 * you shouldn’t assume the window is definitely maximized afterward,
 * because other entities (e.g. the user or
 * [window manager][gtk-X11-arch]) could unmaximize it
 * again, and not all window managers support maximization. But
 * normally the window will end up maximized. Just don’t write code
 * that crashes if not.
 *
 * It’s permitted to call this function before showing a window,
 * in which case the window will be maximized when it appears onscreen
 * initially.
 *
 * You can track the result of this operation via the #GdkToplevel:state
 * property, or by listening to notifications on the #GtkWindow:is-maximized
 * property.
 */
void
gtk_window_maximize (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  priv->maximize_initially = TRUE;

  gtk_window_update_toplevel (window);
}

/**
 * gtk_window_unmaximize:
 * @window: a #GtkWindow
 *
 * Asks to unmaximize @window. Note that you shouldn’t assume the
 * window is definitely unmaximized afterward, because other entities
 * (e.g. the user or [window manager][gtk-X11-arch])
 * could maximize it again, and not all window
 * managers honor requests to unmaximize. But normally the window will
 * end up unmaximized. Just don’t write code that crashes if not.
 *
 * You can track the result of this operation via the #GdkToplevel:state
 * property, or by listening to notifications on the #GtkWindow:is-maximized
 * property.
 */
void
gtk_window_unmaximize (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  priv->maximize_initially = FALSE;

  gtk_window_update_toplevel (window);
}

/**
 * gtk_window_fullscreen:
 * @window: a #GtkWindow
 *
 * Asks to place @window in the fullscreen state. Note that you
 * shouldn’t assume the window is definitely full screen afterward,
 * because other entities (e.g. the user or
 * [window manager][gtk-X11-arch]) could unfullscreen it
 * again, and not all window managers honor requests to fullscreen
 * windows. But normally the window will end up fullscreen. Just
 * don’t write code that crashes if not.
 *
 * You can track iconification via the #GdkToplevel:state property
 **/
void
gtk_window_fullscreen (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  priv->fullscreen_initially = TRUE;

  gtk_window_update_toplevel (window);
}

static void
unset_fullscreen_monitor (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->initial_fullscreen_monitor)
    {
      g_signal_handlers_disconnect_by_func (priv->initial_fullscreen_monitor, unset_fullscreen_monitor, window);
      g_object_unref (priv->initial_fullscreen_monitor);
      priv->initial_fullscreen_monitor = NULL;
    }
}

/**
 * gtk_window_fullscreen_on_monitor:
 * @window: a #GtkWindow
 * @monitor: which monitor to go fullscreen on
 *
 * Asks to place @window in the fullscreen state. Note that you shouldn't assume
 * the window is definitely full screen afterward.
 *
 * You can track iconification via the #GdkToplevel:state property
 */
void
gtk_window_fullscreen_on_monitor (GtkWindow  *window,
                                  GdkMonitor *monitor)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));
  g_return_if_fail (GDK_IS_MONITOR (monitor));
  g_return_if_fail (gdk_monitor_is_valid (monitor));

  gtk_window_set_display (window, gdk_monitor_get_display (monitor));

  unset_fullscreen_monitor (window);
  priv->initial_fullscreen_monitor = monitor;
  g_signal_connect_swapped (priv->initial_fullscreen_monitor, "invalidate",
                            G_CALLBACK (unset_fullscreen_monitor), window);
  g_object_ref (priv->initial_fullscreen_monitor);

  priv->fullscreen_initially = TRUE;

  gtk_window_update_toplevel (window);
}

/**
 * gtk_window_unfullscreen:
 * @window: a #GtkWindow
 *
 * Asks to toggle off the fullscreen state for @window. Note that you
 * shouldn’t assume the window is definitely not full screen
 * afterward, because other entities (e.g. the user or
 * [window manager][gtk-X11-arch]) could fullscreen it
 * again, and not all window managers honor requests to unfullscreen
 * windows. But normally the window will end up restored to its normal
 * state. Just don’t write code that crashes if not.
 *
 * You can track iconification via the #GdkToplevel:state property
 **/
void
gtk_window_unfullscreen (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  unset_fullscreen_monitor (window);
  priv->fullscreen_initially = FALSE;

  gtk_window_update_toplevel (window);
}

/**
 * gtk_window_set_resizable:
 * @window: a #GtkWindow
 * @resizable: %TRUE if the user can resize this window
 *
 * Sets whether the user can resize a window. Windows are user resizable
 * by default.
 **/
void
gtk_window_set_resizable (GtkWindow *window,
                          gboolean   resizable)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  resizable = (resizable != FALSE);

  if (priv->resizable != resizable)
    {
      priv->resizable = resizable;

      update_window_actions (window);

      gtk_widget_queue_resize (GTK_WIDGET (window));

      g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_RESIZABLE]);
    }
}

/**
 * gtk_window_get_resizable:
 * @window: a #GtkWindow
 *
 * Gets the value set by gtk_window_set_resizable().
 *
 * Returns: %TRUE if the user can resize the window
 **/
gboolean
gtk_window_get_resizable (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->resizable;
}

/**
 * gtk_window_set_display:
 * @window: a #GtkWindow.
 * @display: a #GdkDisplay.
 *
 * Sets the #GdkDisplay where the @window is displayed; if
 * the window is already mapped, it will be unmapped, and
 * then remapped on the new display.
 */
void
gtk_window_set_display (GtkWindow  *window,
		        GdkDisplay *display)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkWidget *widget;
  gboolean was_mapped;

  g_return_if_fail (GTK_IS_WINDOW (window));
  g_return_if_fail (GDK_IS_DISPLAY (display));

  if (display == priv->display)
    return;

  /* reset initial_fullscreen_monitor since they are relative to the screen */
  unset_fullscreen_monitor (window);

  widget = GTK_WIDGET (window);

  was_mapped = _gtk_widget_get_mapped (widget);

  if (was_mapped)
    gtk_widget_unmap (widget);
  if (_gtk_widget_get_realized (widget))
    gtk_widget_unrealize (widget);

  if (priv->transient_parent && gtk_widget_get_display (GTK_WIDGET (priv->transient_parent)) != display)
    gtk_window_set_transient_for (window, NULL);

#ifdef GDK_WINDOWING_X11
  g_signal_handlers_disconnect_by_func (gtk_settings_get_for_display (priv->display),
                                        gtk_window_on_theme_variant_changed, window);
  g_signal_connect (gtk_settings_get_for_display (display),
                    "notify::gtk-application-prefer-dark-theme",
                    G_CALLBACK (gtk_window_on_theme_variant_changed), window);
#endif

  gtk_widget_unroot (widget);
  priv->display = display;

  gtk_widget_root (widget);

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_DISPLAY]);

  if (was_mapped)
    gtk_widget_map (widget);

  check_scale_changed (window);

  gtk_widget_system_setting_changed (GTK_WIDGET (window), GTK_SYSTEM_SETTING_DISPLAY);
}

static void
gtk_window_set_theme_variant (GtkWindow *window)
{
#ifdef GDK_WINDOWING_X11
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gboolean   dark_theme_requested;

  g_object_get (gtk_settings_get_for_display (priv->display),
                "gtk-application-prefer-dark-theme", &dark_theme_requested,
                NULL);

  if (GDK_IS_X11_SURFACE (priv->surface))
    gdk_x11_surface_set_theme_variant (priv->surface,
                                       dark_theme_requested ? "dark" : NULL);
#endif
}

#ifdef GDK_WINDOWING_X11
static void
gtk_window_on_theme_variant_changed (GtkSettings *settings,
                                     GParamSpec  *pspec,
                                     GtkWindow   *window)
{
  gtk_window_set_theme_variant (window);
}
#endif

/**
 * gtk_window_is_active:
 * @window: a #GtkWindow
 * 
 * Returns whether the window is part of the current active toplevel.
 * (That is, the toplevel window receiving keystrokes.)
 * The return value is %TRUE if the window is active toplevel itself.
 * You might use this function if you wanted to draw a widget
 * differently in an active window from a widget in an inactive window.
 * 
 * Returns: %TRUE if the window part of the current active window.
 **/
gboolean
gtk_window_is_active (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->is_active;
}

/**
 * gtk_window_get_group:
 * @window: (allow-none): a #GtkWindow, or %NULL
 *
 * Returns the group for @window or the default group, if
 * @window is %NULL or if @window does not have an explicit
 * window group.
 *
 * Returns: (transfer none): the #GtkWindowGroup for a window or the default group
 */
GtkWindowGroup *
gtk_window_get_group (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (window && priv->group)
    return priv->group;
  else
    {
      static GtkWindowGroup *default_group = NULL;

      if (!default_group)
	default_group = gtk_window_group_new ();

      return default_group;
    }
}

/**
 * gtk_window_has_group:
 * @window: a #GtkWindow
 *
 * Returns whether @window has an explicit window group.
 *
 * Returns: %TRUE if @window has an explicit window group.
 **/
gboolean
gtk_window_has_group (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->group != NULL;
}

GtkWindowGroup *
_gtk_window_get_window_group (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  return priv->group;
}

void
_gtk_window_set_window_group (GtkWindow      *window,
                              GtkWindowGroup *group)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  priv->group = group;
}

static gboolean
gtk_window_activate_menubar (GtkWidget *widget,
                             GVariant  *args,
                             gpointer   unused)
{
  GtkWindow *window = GTK_WINDOW (widget);
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GList *tmp_menubars, *l;
  GPtrArray *menubars;
  GtkWidget *focus;
  GtkWidget *first;

  focus = gtk_window_get_focus (window);

  if (priv->title_box != NULL &&
      (focus == NULL || !gtk_widget_is_ancestor (focus, priv->title_box)) &&
      gtk_widget_child_focus (priv->title_box, GTK_DIR_TAB_FORWARD))
    return TRUE;

  tmp_menubars = gtk_popover_menu_bar_get_viewable_menu_bars (window);
  if (tmp_menubars == NULL)
    return FALSE;

  menubars = g_ptr_array_sized_new (g_list_length (tmp_menubars));;
  for (l = tmp_menubars; l; l = l->next)
    g_ptr_array_add (menubars, l->data);

  g_list_free (tmp_menubars);

  gtk_widget_focus_sort (GTK_WIDGET (window), GTK_DIR_TAB_FORWARD, menubars);

  first = g_ptr_array_index (menubars, 0);
  gtk_popover_menu_bar_select_first (GTK_POPOVER_MENU_BAR (first));

  g_ptr_array_free (menubars, TRUE);

  return TRUE;
}

static void
gtk_window_keys_changed (GtkWindow *window)
{
}

/*
 * _gtk_window_set_is_active:
 * @window: a #GtkWindow
 * @is_active: %TRUE if the window is in the currently active toplevel
 * 
 * Internal function that sets whether the #GtkWindow is part
 * of the currently active toplevel window (taking into account inter-process
 * embedding.)
 **/
static void
_gtk_window_set_is_active (GtkWindow *window,
			   gboolean   is_active)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  if (priv->is_active == is_active)
    return;

  priv->is_active = is_active;

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_IS_ACTIVE]);
  _gtk_window_accessible_set_is_active (window, is_active);
}

/**
 * gtk_window_set_auto_startup_notification:
 * @setting: %TRUE to automatically do startup notification
 *
 * By default, after showing the first #GtkWindow, GTK+ calls 
 * gdk_notify_startup_complete().  Call this function to disable 
 * the automatic startup notification. You might do this if your 
 * first window is a splash screen, and you want to delay notification 
 * until after your real main window has been shown, for example.
 *
 * In that example, you would disable startup notification
 * temporarily, show your splash screen, then re-enable it so that
 * showing the main window would automatically result in notification.
 **/
void
gtk_window_set_auto_startup_notification (gboolean setting)
{
  disable_startup_notification = !setting;
}

/**
 * gtk_window_get_mnemonics_visible:
 * @window: a #GtkWindow
 *
 * Gets the value of the #GtkWindow:mnemonics-visible property.
 *
 * Returns: %TRUE if mnemonics are supposed to be visible
 * in this window.
 */
gboolean
gtk_window_get_mnemonics_visible (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->mnemonics_visible;
}

/**
 * gtk_window_set_mnemonics_visible:
 * @window: a #GtkWindow
 * @setting: the new value
 *
 * Sets the #GtkWindow:mnemonics-visible property.
 */
void
gtk_window_set_mnemonics_visible (GtkWindow *window,
                                  gboolean   setting)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  setting = setting != FALSE;

  if (priv->mnemonics_visible != setting)
    {
      priv->mnemonics_visible = setting;
      g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_MNEMONICS_VISIBLE]);
    }

  if (priv->mnemonics_display_timeout_id)
    {
      g_source_remove (priv->mnemonics_display_timeout_id);
      priv->mnemonics_display_timeout_id = 0;
    }
}

static gboolean
schedule_mnemonics_visible_cb (gpointer data)
{
  GtkWindow *window = data;
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  priv->mnemonics_display_timeout_id = 0;

  gtk_window_set_mnemonics_visible (window, TRUE);

  return FALSE;
}

void
_gtk_window_schedule_mnemonics_visible (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  if (priv->mnemonics_display_timeout_id)
    return;

  priv->mnemonics_display_timeout_id =
    g_timeout_add (MNEMONICS_DELAY, schedule_mnemonics_visible_cb, window);
  g_source_set_name_by_id (priv->mnemonics_display_timeout_id, "[gtk] schedule_mnemonics_visible_cb");
}

/**
 * gtk_window_get_focus_visible:
 * @window: a #GtkWindow
 *
 * Gets the value of the #GtkWindow:focus-visible property.
 *
 * Returns: %TRUE if “focus rectangles” are supposed to be visible
 *     in this window.
 */
gboolean
gtk_window_get_focus_visible (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), FALSE);

  return priv->focus_visible;
}

static gboolean
unset_focus_visible (gpointer data)
{
  GtkWindow *window = data;
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  priv->focus_visible_timeout = 0;

  gtk_window_set_focus_visible (window, FALSE);

  return G_SOURCE_REMOVE;
}

/**
 * gtk_window_set_focus_visible:
 * @window: a #GtkWindow
 * @setting: the new value
 *
 * Sets the #GtkWindow:focus-visible property.
 */
void
gtk_window_set_focus_visible (GtkWindow *window,
                              gboolean   setting)
{
  gboolean changed;

  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));

  changed = priv->focus_visible != setting;

  priv->focus_visible = setting;

  if (priv->focus_visible_timeout)
    {
      g_source_remove (priv->focus_visible_timeout);
      priv->focus_visible_timeout = 0;
    }

  if (priv->focus_visible)
    priv->focus_visible_timeout = g_timeout_add_seconds (VISIBLE_FOCUS_DURATION, unset_focus_visible, window);

  if (changed)
    {
      if (priv->focus_widget)
        {
          GtkWidget *widget;

          for (widget = priv->focus_widget; widget; widget = gtk_widget_get_parent (widget))
            {
              if (priv->focus_visible)
                gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_FOCUS_VISIBLE, FALSE);
              else
                gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_FOCUS_VISIBLE);
            }
        }
      g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_FOCUS_VISIBLE]);
    }
}

static void
ensure_state_flag_backdrop (GtkWidget *widget)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (GTK_WINDOW (widget));
  gboolean surface_focused = TRUE;

  surface_focused = gdk_toplevel_get_state (GDK_TOPLEVEL (priv->surface)) & GDK_SURFACE_STATE_FOCUSED;

  if (!surface_focused)
    gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_BACKDROP, FALSE);
  else
    gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_BACKDROP);
}

void
_gtk_window_get_shadow_width (GtkWindow *window,
                              GtkBorder *border)
{
  get_shadow_width (window, border);
}

static void set_warn_again (gboolean warn);
static void gtk_window_set_debugging (GdkDisplay *display,
                                      gboolean    enable,
                                      gboolean    toggle,
                                      gboolean    select,
                                      gboolean    warn);

static void
warn_response (GtkDialog *dialog,
               gint       response)
{
  GtkWidget *check;
  gboolean remember;
  GtkWidget *inspector_window;
  GdkDisplay *display;

  inspector_window = GTK_WIDGET (gtk_window_get_transient_for (GTK_WINDOW (dialog)));
  display = gtk_inspector_window_get_inspected_display (GTK_INSPECTOR_WINDOW (inspector_window));

  check = g_object_get_data (G_OBJECT (dialog), "check");
  remember = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (check));

  gtk_window_destroy (GTK_WINDOW (dialog));
  g_object_set_data (G_OBJECT (inspector_window), "warning_dialog", NULL);

  if (response == GTK_RESPONSE_NO)
    gtk_window_set_debugging (display, FALSE, FALSE, FALSE, FALSE);
  else
    set_warn_again (!remember);
}

static void
gtk_window_set_debugging (GdkDisplay *display,
                          gboolean    enable,
                          gboolean    toggle,
                          gboolean    select,
                          gboolean    warn)
{
  GtkWidget *dialog = NULL;
  GtkWidget *area;
  GtkWidget *check;
  GtkWidget *inspector_window;
  gboolean was_debugging;

  was_debugging = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (display), "-gtk-debugging-enabled"));

  if (toggle)
    enable = !was_debugging;

  g_object_set_data (G_OBJECT (display), "-gtk-debugging-enabled", GINT_TO_POINTER (enable));

  if (enable)
    {
      inspector_window = gtk_inspector_window_get (display);

      gtk_window_present (GTK_WINDOW (inspector_window));

      if (warn)
        {
          dialog = gtk_message_dialog_new (GTK_WINDOW (inspector_window),
                                           GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,
                                           GTK_MESSAGE_QUESTION,
                                           GTK_BUTTONS_NONE,
                                           _("Do you want to use GTK Inspector?"));
          gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
              _("GTK Inspector is an interactive debugger that lets you explore and "
                "modify the internals of any GTK application. Using it may cause the "
                "application to break or crash."));

          area = gtk_message_dialog_get_message_area (GTK_MESSAGE_DIALOG (dialog));
          check = gtk_check_button_new_with_label (_("Don’t show this message again"));
          gtk_widget_set_margin_start (check, 10);
          gtk_widget_show (check);
          gtk_container_add (GTK_CONTAINER (area), check);
          g_object_set_data (G_OBJECT (dialog), "check", check);
          gtk_dialog_add_button (GTK_DIALOG (dialog), _("_Cancel"), GTK_RESPONSE_NO);
          gtk_dialog_add_button (GTK_DIALOG (dialog), _("_OK"), GTK_RESPONSE_YES);
          g_signal_connect (dialog, "response", G_CALLBACK (warn_response), inspector_window);
          g_object_set_data (G_OBJECT (inspector_window), "warning_dialog", dialog);

          gtk_widget_show (dialog);
        }

      if (select)
        gtk_inspector_window_select_widget_under_pointer (GTK_INSPECTOR_WINDOW (inspector_window));
    }
  else if (was_debugging)
    {
      inspector_window = gtk_inspector_window_get (display);

      gtk_widget_hide (inspector_window);
    }
}

/**
 * gtk_window_set_interactive_debugging:
 * @enable: %TRUE to enable interactive debugging
 *
 * Opens or closes the [interactive debugger][interactive-debugging],
 * which offers access to the widget hierarchy of the application
 * and to useful debugging tools.
 */
void
gtk_window_set_interactive_debugging (gboolean enable)
{
  GdkDisplay *display = gdk_display_get_default ();

  gtk_window_set_debugging (display, enable, FALSE, FALSE, FALSE);
}

static gboolean
inspector_keybinding_enabled (gboolean *warn)
{
  GSettingsSchema *schema;
  GSettings *settings;
  gboolean enabled;

  enabled = FALSE;
  *warn = FALSE;

  schema = g_settings_schema_source_lookup (g_settings_schema_source_get_default (),
                                            "org.gtk.gtk4.Settings.Debug",
                                            TRUE);

  if (schema)
    {
      settings = g_settings_new_full (schema, NULL, NULL);
      enabled = g_settings_get_boolean (settings, "enable-inspector-keybinding");
      *warn = g_settings_get_boolean (settings, "inspector-warning");
      g_object_unref (settings);
      g_settings_schema_unref (schema);
    }

  return enabled;
}

static void
set_warn_again (gboolean warn)
{
  GSettingsSchema *schema;
  GSettings *settings;

  schema = g_settings_schema_source_lookup (g_settings_schema_source_get_default (),
                                            "org.gtk.gtk4.Settings.Debug",
                                            TRUE);

  if (schema)
    {
      settings = g_settings_new_full (schema, NULL, NULL);
      g_settings_set_boolean (settings, "inspector-warning", warn);
      g_object_unref (settings);
      g_settings_schema_unref (schema);
    }
}

static gboolean
gtk_window_enable_debugging (GtkWindow *window,
                             gboolean   toggle)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  gboolean warn;

  if (!inspector_keybinding_enabled (&warn))
    return FALSE;

  gtk_window_set_debugging (priv->display, TRUE, toggle, !toggle, warn);

  return TRUE;
}

#ifdef GDK_WINDOWING_WAYLAND
typedef struct {
  GtkWindow *window;
  GtkWindowHandleExported callback;
  gpointer user_data;
} WaylandSurfaceHandleExportedData;

static void
wayland_surface_handle_exported (GdkSurface  *window,
				 const char *wayland_handle_str,
				 gpointer    user_data)
{
  WaylandSurfaceHandleExportedData *data = user_data;
  char *handle_str;

  handle_str = g_strdup_printf ("wayland:%s", wayland_handle_str);
  data->callback (data->window, handle_str, data->user_data);
  g_free (handle_str);
}
#endif

gboolean
gtk_window_export_handle (GtkWindow               *window,
                          GtkWindowHandleExported  callback,
                          gpointer                 user_data)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

#ifdef GDK_WINDOWING_X11
  if (GDK_IS_X11_DISPLAY (gtk_widget_get_display (GTK_WIDGET (window))))
    {
      char *handle_str;
      guint32 xid = (guint32) gdk_x11_surface_get_xid (priv->surface);

      handle_str = g_strdup_printf ("x11:%x", xid);
      callback (window, handle_str, user_data);
      g_free (handle_str);

      return TRUE;
    }
#endif
#ifdef GDK_WINDOWING_WAYLAND
  if (GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (GTK_WIDGET (window))))
    {
      WaylandSurfaceHandleExportedData *data;

      data = g_new0 (WaylandSurfaceHandleExportedData, 1);
      data->window = window;
      data->callback = callback;
      data->user_data = user_data;

      if (!gdk_wayland_surface_export_handle (priv->surface,
					      wayland_surface_handle_exported,
					      data,
					      g_free))
        {
          g_free (data);
          return FALSE;
        }
      else
        {
          return TRUE;
        }
    }
#endif

  g_warning ("Couldn't export handle for %s surface, unsupported windowing system",
             G_OBJECT_TYPE_NAME (priv->surface));

  return FALSE;
}

void
gtk_window_unexport_handle (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

#ifdef GDK_WINDOWING_WAYLAND
  if (GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (GTK_WIDGET (window))))
    {
      gdk_wayland_surface_unexport_handle (priv->surface);
      return;
    }
#endif

  g_warning ("Couldn't unexport handle for %s surface, unsupported windowing system",
             G_OBJECT_TYPE_NAME (priv->surface));
}

static GtkPointerFocus *
gtk_window_lookup_pointer_focus (GtkWindow        *window,
                                 GdkDevice        *device,
                                 GdkEventSequence *sequence)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GList *l;

  for (l = priv->foci; l; l = l->next)
    {
      GtkPointerFocus *focus = l->data;

      if (focus->device == device && focus->sequence == sequence)
        return focus;
    }

  return NULL;
}

GtkWidget *
gtk_window_lookup_pointer_focus_widget (GtkWindow        *window,
                                        GdkDevice        *device,
                                        GdkEventSequence *sequence)
{
  GtkPointerFocus *focus;

  focus = gtk_window_lookup_pointer_focus (window, device, sequence);
  return focus ? gtk_pointer_focus_get_target (focus) : NULL;
}

GtkWidget *
gtk_window_lookup_effective_pointer_focus_widget (GtkWindow        *window,
                                                  GdkDevice        *device,
                                                  GdkEventSequence *sequence)
{
  GtkPointerFocus *focus;

  focus = gtk_window_lookup_pointer_focus (window, device, sequence);
  return focus ? gtk_pointer_focus_get_effective_target (focus) : NULL;
}

GtkWidget *
gtk_window_lookup_pointer_focus_implicit_grab (GtkWindow        *window,
                                               GdkDevice        *device,
                                               GdkEventSequence *sequence)
{
  GtkPointerFocus *focus;

  focus = gtk_window_lookup_pointer_focus (window, device, sequence);
  return focus ? gtk_pointer_focus_get_implicit_grab (focus) : NULL;
}

void
gtk_window_update_pointer_focus (GtkWindow        *window,
                                 GdkDevice        *device,
                                 GdkEventSequence *sequence,
                                 GtkWidget        *target,
                                 gdouble           x,
                                 gdouble           y)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GtkPointerFocus *focus;

  focus = gtk_window_lookup_pointer_focus (window, device, sequence);
  if (focus)
    {
      gtk_pointer_focus_ref (focus);

      if (target)
        {
          gtk_pointer_focus_set_target (focus, target);
          gtk_pointer_focus_set_coordinates (focus, x, y);
        }
      else
        {
          GList *pos;

          pos = g_list_find (priv->foci, focus);
          if (pos)
            {
              priv->foci = g_list_remove (priv->foci, focus);
              gtk_pointer_focus_unref (focus);
            }
        }

      gtk_pointer_focus_unref (focus);
    }
  else if (target)
    {
      focus = gtk_pointer_focus_new (window, target, device, sequence, x, y);
      priv->foci = g_list_prepend (priv->foci, focus);
    }
}

void
gtk_window_update_pointer_focus_on_state_change (GtkWindow *window,
                                                 GtkWidget *widget)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GList *l = priv->foci;

  while (l)
    {
      GList *next;

      GtkPointerFocus *focus = l->data;

      next = l->next;

      gtk_pointer_focus_ref (focus);

      if (focus->grab_widget &&
          (focus->grab_widget == widget ||
           gtk_widget_is_ancestor (focus->grab_widget, widget)))
        gtk_pointer_focus_set_implicit_grab (focus, NULL);

      if (GTK_WIDGET (focus->toplevel) == widget)
        {
          /* Unmapping the toplevel, remove pointer focus */
          priv->foci = g_list_remove_link (priv->foci, l);
          gtk_pointer_focus_unref (focus);
          g_list_free (l);
        }
      else if (focus->target == widget ||
               gtk_widget_is_ancestor (focus->target, widget))
        {
          gtk_pointer_focus_repick_target (focus);
        }

      gtk_pointer_focus_unref (focus);

      l = next;
    }
}

void
gtk_window_maybe_revoke_implicit_grab (GtkWindow *window,
                                       GdkDevice *device,
                                       GtkWidget *grab_widget)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GList *l = priv->foci;

  while (l)
    {
      GtkPointerFocus *focus = l->data;

      l = l->next;

      if (focus->toplevel != window)
        continue;

      if ((!device || focus->device == device) &&
          focus->target != grab_widget &&
          !gtk_widget_is_ancestor (focus->target, grab_widget))
        gtk_window_set_pointer_focus_grab (window,
                                           focus->device,
                                           focus->sequence,
                                           NULL);
    }
}

void
gtk_window_set_pointer_focus_grab (GtkWindow        *window,
                                   GdkDevice        *device,
                                   GdkEventSequence *sequence,
                                   GtkWidget        *grab_widget)
{
  GtkPointerFocus *focus;

  focus = gtk_window_lookup_pointer_focus (window, device, sequence);
  if (!focus && !grab_widget)
    return;
  g_assert (focus != NULL);
  gtk_pointer_focus_set_implicit_grab (focus, grab_widget);
}

static void
update_cursor (GtkWindow *toplevel,
               GdkDevice *device,
               GtkWidget *grab_widget,
               GtkWidget *target)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (toplevel);
  GdkCursor *cursor = NULL;
  GdkSurface *surface;

  surface = gtk_native_get_surface (gtk_widget_get_native (target));

  if (grab_widget && !gtk_widget_is_ancestor (target, grab_widget) && target != grab_widget)
    {
      /* Outside the grab widget, cursor stays to whatever the grab
       * widget says.
       */
      if (gtk_native_get_surface (gtk_widget_get_native (grab_widget)) == surface)
        cursor = gtk_widget_get_cursor (grab_widget);
      else
        cursor = NULL;
    }
  else
    {
      /* Inside the grab widget or in absence of grabs, allow walking
       * up the hierarchy to find out the cursor.
       */
      while (target)
        {
          /* Don't inherit cursors across surfaces */
          if (surface != gtk_native_get_surface (gtk_widget_get_native (target)))
            break;

          if (target == GTK_WIDGET (toplevel) && priv->resize_cursor != NULL)
            cursor = priv->resize_cursor;
          else
            cursor = gtk_widget_get_cursor (target);

          if (cursor)
            break;

          if (grab_widget && target == grab_widget)
            break;

          target = _gtk_widget_get_parent (target);
        }
    }

  gdk_surface_set_device_cursor (surface, device, cursor);
}

void
gtk_window_maybe_update_cursor (GtkWindow *window,
                                GtkWidget *widget,
                                GdkDevice *device)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);
  GList *l;

  for (l = priv->foci; l; l = l->next)
    {
      GtkPointerFocus *focus = l->data;
      GtkWidget *grab_widget, *target;
      GtkWindowGroup *group;

      if (focus->sequence)
        continue;
      if (device && device != focus->device)
        continue;

      group = gtk_window_get_group (window);

      grab_widget = gtk_window_group_get_current_grab (group);
      if (!grab_widget)
        grab_widget = gtk_pointer_focus_get_implicit_grab (focus);

      target = gtk_pointer_focus_get_target (focus);

      if (widget)
        {
          /* Check whether the changed widget affects the current cursor
           * lookups.
           */
          if (grab_widget && grab_widget != widget &&
              !gtk_widget_is_ancestor (widget, grab_widget))
            continue;
          if (target != widget &&
              !gtk_widget_is_ancestor (target, widget))
            continue;
        }

      update_cursor (focus->toplevel, focus->device, grab_widget, target);

      if (device)
        break;
    }
}

/**
 * gtk_window_set_child:
 * @window: a #GtkWindow
 * @child: (allow-none): the child widget
 *
 * Sets the child widget of @window.
 */
void
gtk_window_set_child (GtkWindow *window,
                      GtkWidget *child)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_if_fail (GTK_IS_WINDOW (window));
  g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));

  g_clear_pointer (&priv->child, gtk_widget_unparent);

  if (child)
    {
      /* Insert the child's css node now at the end so the order wrt.
       * decoration_node is correct
       */
      gtk_css_node_insert_before (gtk_widget_get_css_node (GTK_WIDGET (window)),
                                  gtk_widget_get_css_node (child),
                                  NULL);
      priv->child = child;
      gtk_widget_set_parent (child, GTK_WIDGET (window));
    }

  g_object_notify_by_pspec (G_OBJECT (window), window_props[PROP_CHILD]);
}

/**
 * gtk_window_get_child:
 * @window: a #GtkWindow
 *
 * Gets the child widget of @window.
 *
 * Returns: (nullable) (transfer none): the child widget of @window
 */
GtkWidget *
gtk_window_get_child (GtkWindow *window)
{
  GtkWindowPrivate *priv = gtk_window_get_instance_private (window);

  g_return_val_if_fail (GTK_IS_WINDOW (window), NULL);

  return priv->child;
}

/**
 * gtk_window_destroy:
 * @window: The window to destroy
 *
 * Drop the internal reference GTK holds on toplevel windows.
 */
void
gtk_window_destroy (GtkWindow *window)
{
  int i;

  g_return_if_fail (GTK_IS_WINDOW (window));

  gtk_tooltip_unset_surface (GTK_NATIVE (window));

  for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (toplevel_list)); i++)
    {
      gpointer item = g_list_model_get_item (G_LIST_MODEL (toplevel_list), i);
      if (item == window)
        {
          g_list_store_remove (toplevel_list, i);
          break;
        }
      else
        g_object_unref (item);
    }

  gtk_widget_unrealize (GTK_WIDGET (window));

  g_object_unref (window);
}