mutter/src/core/window.c

/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

/* Mutter X managed windows */

/*
 * Copyright (C) 2001 Havoc Pennington, Anders Carlsson
 * Copyright (C) 2002, 2003 Red Hat, Inc.
 * Copyright (C) 2003 Rob Adams
 * Copyright (C) 2004-2006 Elijah Newren
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <config.h>
#include "window-private.h"
#include "boxes-private.h"
#include "edge-resistance.h"
#include <meta/util.h>
#include "frame.h"
#include <meta/errors.h>
#include "workspace-private.h"
#include "stack.h"
#include "keybindings-private.h"
#include "ui.h"
#include "place.h"
#include "session.h"
#include <meta/prefs.h>
#include "resizepopup.h"
#include "xprops.h"
#include <meta/group.h>
#include "window-props.h"
#include "constraints.h"
#include "mutter-enum-types.h"

#include <X11/Xatom.h>
#include <X11/Xlibint.h> /* For display->resource_mask */
#include <string.h>
#include <math.h>

#ifdef HAVE_SHAPE
#include <X11/extensions/shape.h>
#endif

#include <X11/extensions/Xcomposite.h>

/* Windows that unmaximize to a size bigger than that fraction of the workarea
 * will be scaled down to that size (while maintaining aspect ratio).
 * Windows that cover an area greater then this size are automaximized on map.
 */
#define MAX_UNMAXIMIZED_WINDOW_AREA .8

static int destroying_windows_disallowed = 0;


static void     update_sm_hints           (MetaWindow     *window);
static void     update_net_frame_extents  (MetaWindow     *window);
static void     recalc_window_type        (MetaWindow     *window);
static void     recalc_window_features    (MetaWindow     *window);
static void     invalidate_work_areas     (MetaWindow     *window);
static void     recalc_window_type        (MetaWindow     *window);
static void     set_wm_state_on_xwindow   (MetaDisplay    *display,
                                           Window          xwindow,
                                           int             state);
static void     set_wm_state              (MetaWindow     *window,
                                           int             state);
static void     set_net_wm_state          (MetaWindow     *window);
static void     meta_window_set_above     (MetaWindow     *window,
                                           gboolean        new_value);

static void     send_configure_notify     (MetaWindow     *window);
static gboolean process_property_notify   (MetaWindow     *window,
                                           XPropertyEvent *event);

static void     meta_window_force_placement (MetaWindow     *window);

static void     meta_window_show          (MetaWindow     *window);
static void     meta_window_hide          (MetaWindow     *window);

static gboolean meta_window_same_client (MetaWindow *window,
                                         MetaWindow *other_window);

static void     meta_window_save_rect         (MetaWindow    *window);
static void     save_user_window_placement    (MetaWindow    *window);
static void     force_save_user_window_placement (MetaWindow    *window);

static void meta_window_move_resize_internal (MetaWindow         *window,
                                              MetaMoveResizeFlags flags,
                                              int                 resize_gravity,
                                              int                 root_x_nw,
                                              int                 root_y_nw,
                                              int                 w,
                                              int                 h);

static void     ensure_mru_position_after (MetaWindow *window,
                                           MetaWindow *after_this_one);


static void meta_window_move_resize_now (MetaWindow  *window);

static void meta_window_unqueue (MetaWindow *window, guint queuebits);

static void     update_move           (MetaWindow   *window,
                                       gboolean      snap,
                                       int           x,
                                       int           y);
static gboolean update_move_timeout   (gpointer data);
static void     update_resize         (MetaWindow   *window,
                                       gboolean      snap,
                                       int           x,
                                       int           y,
                                       gboolean      force);
static gboolean update_resize_timeout (gpointer data);
static gboolean should_be_on_all_workspaces (MetaWindow *window);

static void meta_window_flush_calc_showing   (MetaWindow *window);

static gboolean queue_calc_showing_func (MetaWindow *window,
                                         void       *data);

static void meta_window_apply_session_info (MetaWindow                  *window,
                                            const MetaWindowSessionInfo *info);
static void meta_window_move_between_rects (MetaWindow          *window,
                                            const MetaRectangle *old_area,
                                            const MetaRectangle *new_area);

static void unmaximize_window_before_freeing (MetaWindow        *window);
static void unminimize_window_and_all_transient_parents (MetaWindow *window);

/* Idle handlers for the three queues (run with meta_later_add()). The
 * "data" parameter in each case will be a GINT_TO_POINTER of the
 * index into the queue arrays to use.
 *
 * TODO: Possibly there is still some code duplication among these, which we
 * need to sort out at some point.
 */
static gboolean idle_calc_showing (gpointer data);
static gboolean idle_move_resize (gpointer data);
static gboolean idle_update_icon (gpointer data);

G_DEFINE_TYPE (MetaWindow, meta_window, G_TYPE_OBJECT);

enum {
  PROP_0,

  PROP_TITLE,
  PROP_ICON,
  PROP_MINI_ICON,
  PROP_DECORATED,
  PROP_FULLSCREEN,
  PROP_MAXIMIZED_HORIZONTALLY,
  PROP_MAXIMIZED_VERTICALLY,
  PROP_MINIMIZED,
  PROP_WINDOW_TYPE,
  PROP_USER_TIME,
  PROP_DEMANDS_ATTENTION,
  PROP_URGENT,
  PROP_MUTTER_HINTS,
  PROP_APPEARS_FOCUSED,
  PROP_RESIZEABLE,
  PROP_ABOVE,
  PROP_WM_CLASS,
  PROP_GTK_APPLICATION_ID,
  PROP_GTK_UNIQUE_BUS_NAME,
  PROP_GTK_APPLICATION_OBJECT_PATH,
  PROP_GTK_WINDOW_OBJECT_PATH,
  PROP_GTK_APP_MENU_OBJECT_PATH,
  PROP_GTK_MENUBAR_OBJECT_PATH
};

enum
{
  WORKSPACE_CHANGED,
  FOCUS,
  RAISED,
  UNMANAGED,

  LAST_SIGNAL
};

static guint window_signals[LAST_SIGNAL] = { 0 };

static void
prefs_changed_callback (MetaPreference pref,
                        gpointer       data)
{
  MetaWindow *window = data;

  if (pref == META_PREF_WORKSPACES_ONLY_ON_PRIMARY)
    {
      meta_window_update_on_all_workspaces (window);
      meta_window_queue (window, META_QUEUE_CALC_SHOWING);
    }
  else if (pref == META_PREF_ATTACH_MODAL_DIALOGS &&
           window->type == META_WINDOW_MODAL_DIALOG)
    {
      window->attached = meta_window_should_attach_to_parent (window);
      recalc_window_features (window);
      meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
    }
}

static void
meta_window_finalize (GObject *object)
{
  MetaWindow *window = META_WINDOW (object);

  if (window->icon)
    g_object_unref (G_OBJECT (window->icon));

  if (window->mini_icon)
    g_object_unref (G_OBJECT (window->mini_icon));

  if (window->frame_bounds)
    cairo_region_destroy (window->frame_bounds);

  meta_icon_cache_free (&window->icon_cache);

  g_free (window->sm_client_id);
  g_free (window->wm_client_machine);
  g_free (window->startup_id);
  g_free (window->role);
  g_free (window->res_class);
  g_free (window->res_name);
  g_free (window->title);
  g_free (window->icon_name);
  g_free (window->desc);
  g_free (window->gtk_theme_variant);
  g_free (window->gtk_application_id);
  g_free (window->gtk_unique_bus_name);
  g_free (window->gtk_application_object_path);
  g_free (window->gtk_window_object_path);
  g_free (window->gtk_app_menu_object_path);
  g_free (window->gtk_menubar_object_path);
}

static void
meta_window_get_property(GObject         *object,
                         guint            prop_id,
                         GValue          *value,
                         GParamSpec      *pspec)
{
  MetaWindow *win = META_WINDOW (object);

  switch (prop_id)
    {
    case PROP_TITLE:
      g_value_set_string (value, win->title);
      break;
    case PROP_ICON:
      g_value_set_object (value, win->icon);
      break;
    case PROP_MINI_ICON:
      g_value_set_object (value, win->mini_icon);
      break;
    case PROP_DECORATED:
      g_value_set_boolean (value, win->decorated);
      break;
    case PROP_FULLSCREEN:
      g_value_set_boolean (value, win->fullscreen);
      break;
    case PROP_MAXIMIZED_HORIZONTALLY:
      g_value_set_boolean (value, win->maximized_horizontally);
      break;
    case PROP_MAXIMIZED_VERTICALLY:
      g_value_set_boolean (value, win->maximized_vertically);
      break;
    case PROP_MINIMIZED:
      g_value_set_boolean (value, win->minimized);
      break;
    case PROP_WINDOW_TYPE:
      g_value_set_enum (value, win->type);
      break;
    case PROP_USER_TIME:
      g_value_set_uint (value, win->net_wm_user_time);
      break;
    case PROP_DEMANDS_ATTENTION:
      g_value_set_boolean (value, win->wm_state_demands_attention);
      break;
    case PROP_URGENT:
      g_value_set_boolean (value, win->wm_hints_urgent);
      break;
    case PROP_MUTTER_HINTS:
      g_value_set_string (value, win->mutter_hints);
      break;
    case PROP_APPEARS_FOCUSED:
      g_value_set_boolean (value, meta_window_appears_focused (win));
      break;
    case PROP_WM_CLASS:
      g_value_set_string (value, win->res_class);
      break;
    case PROP_RESIZEABLE:
      g_value_set_boolean (value, win->has_resize_func);
      break;
    case PROP_ABOVE:
      g_value_set_boolean (value, win->wm_state_above);
      break;
    case PROP_GTK_APPLICATION_ID:
      g_value_set_string (value, win->gtk_application_id);
      break;
    case PROP_GTK_UNIQUE_BUS_NAME:
      g_value_set_string (value, win->gtk_unique_bus_name);
      break;
    case PROP_GTK_APPLICATION_OBJECT_PATH:
      g_value_set_string (value, win->gtk_application_object_path);
      break;
    case PROP_GTK_WINDOW_OBJECT_PATH:
      g_value_set_string (value, win->gtk_window_object_path);
      break;
    case PROP_GTK_APP_MENU_OBJECT_PATH:
      g_value_set_string (value, win->gtk_app_menu_object_path);
      break;
    case PROP_GTK_MENUBAR_OBJECT_PATH:
      g_value_set_string (value, win->gtk_menubar_object_path);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
meta_window_set_property(GObject         *object,
                         guint            prop_id,
                         const GValue    *value,
                         GParamSpec      *pspec)
{
  switch (prop_id)
    {
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
meta_window_class_init (MetaWindowClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  object_class->finalize = meta_window_finalize;

  object_class->get_property = meta_window_get_property;
  object_class->set_property = meta_window_set_property;

  g_object_class_install_property (object_class,
                                   PROP_TITLE,
                                   g_param_spec_string ("title",
                                                        "Title",
                                                        "The title of the window",
                                                        NULL,
                                                        G_PARAM_READABLE));
  g_object_class_install_property (object_class,
                                   PROP_ICON,
                                   g_param_spec_object ("icon",
                                                        "Icon",
                                                        "96 pixel sized icon",
                                                        GDK_TYPE_PIXBUF,
                                                        G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_MINI_ICON,
                                   g_param_spec_object ("mini-icon",
                                                        "Mini Icon",
                                                        "16 pixel sized icon",
                                                        GDK_TYPE_PIXBUF,
                                                        G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_DECORATED,
                                   g_param_spec_boolean ("decorated",
                                                         "Decorated",
                                                         "Whether window is decorated",
                                                         TRUE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_FULLSCREEN,
                                   g_param_spec_boolean ("fullscreen",
                                                         "Fullscreen",
                                                         "Whether window is fullscreened",
                                                         FALSE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_MAXIMIZED_HORIZONTALLY,
                                   g_param_spec_boolean ("maximized-horizontally",
                                                         "Maximized horizontally",
                                                         "Whether window is maximized horizontally",
                                                         FALSE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_MAXIMIZED_VERTICALLY,
                                   g_param_spec_boolean ("maximized-vertically",
                                                         "Maximizing vertically",
                                                         "Whether window is maximized vertically",
                                                         FALSE,
                                                         G_PARAM_READABLE));
  g_object_class_install_property (object_class,
                                   PROP_MINIMIZED,
                                   g_param_spec_boolean ("minimized",
                                                         "Minimizing",
                                                         "Whether window is minimized",
                                                         FALSE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_WINDOW_TYPE,
                                   g_param_spec_enum ("window-type",
                                                      "Window Type",
                                                      "The type of the window",
                                                      META_TYPE_WINDOW_TYPE,
                                                      META_WINDOW_NORMAL,
                                                      G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_USER_TIME,
                                   g_param_spec_uint ("user-time",
                                                      "User time",
                                                      "Timestamp of last user interaction",
                                                      0,
                                                      G_MAXUINT,
                                                      0,
                                                      G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_DEMANDS_ATTENTION,
                                   g_param_spec_boolean ("demands-attention",
                                                         "Demands Attention",
                                                         "Whether the window has _NET_WM_STATE_DEMANDS_ATTENTION set",
                                                         FALSE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_URGENT,
                                   g_param_spec_boolean ("urgent",
                                                         "Urgent",
                                                         "Whether the urgent flag of WM_HINTS is set",
                                                         FALSE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_MUTTER_HINTS,
                                   g_param_spec_string ("mutter-hints",
                                                        "_MUTTER_HINTS",
                                                        "Contents of the _MUTTER_HINTS property of this window",
                                                        NULL,
                                                        G_PARAM_READABLE));
  g_object_class_install_property (object_class,
                                   PROP_APPEARS_FOCUSED,
                                   g_param_spec_boolean ("appears-focused",
                                                         "Appears focused",
                                                         "Whether the window is drawn as being focused",
                                                         FALSE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_RESIZEABLE,
                                   g_param_spec_boolean ("resizeable",
                                                         "Resizeable",
                                                         "Whether the window can be resized",
                                                         FALSE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_ABOVE,
                                   g_param_spec_boolean ("above",
                                                         "Above",
                                                         "Whether the window is shown as always-on-top",
                                                         FALSE,
                                                         G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_WM_CLASS,
                                   g_param_spec_string ("wm-class",
                                                        "WM_CLASS",
                                                        "Contents of the WM_CLASS property of this window",
                                                        NULL,
                                                        G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_GTK_APPLICATION_ID,
                                   g_param_spec_string ("gtk-application-id",
                                                        "_GTK_APPLICATION_ID",
                                                        "Contents of the _GTK_APPLICATION_ID property of this window",
                                                        NULL,
                                                        G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_GTK_UNIQUE_BUS_NAME,
                                   g_param_spec_string ("gtk-unique-bus-name",
                                                        "_GTK_UNIQUE_BUS_NAME",
                                                        "Contents of the _GTK_UNIQUE_BUS_NAME property of this window",
                                                        NULL,
                                                        G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_GTK_APPLICATION_OBJECT_PATH,
                                   g_param_spec_string ("gtk-application-object-path",
                                                        "_GTK_APPLICATION_OBJECT_PATH",
                                                        "Contents of the _GTK_APPLICATION_OBJECT_PATH property of this window",
                                                        NULL,
                                                        G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_GTK_WINDOW_OBJECT_PATH,
                                   g_param_spec_string ("gtk-window-object-path",
                                                        "_GTK_WINDOW_OBJECT_PATH",
                                                        "Contents of the _GTK_WINDOW_OBJECT_PATH property of this window",
                                                        NULL,
                                                        G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_GTK_APP_MENU_OBJECT_PATH,
                                   g_param_spec_string ("gtk-app-menu-object-path",
                                                        "_GTK_APP_MENU_OBJECT_PATH",
                                                        "Contents of the _GTK_APP_MENU_OBJECT_PATH property of this window",
                                                        NULL,
                                                        G_PARAM_READABLE));

  g_object_class_install_property (object_class,
                                   PROP_GTK_MENUBAR_OBJECT_PATH,
                                   g_param_spec_string ("gtk-menubar-object-path",
                                                        "_GTK_MENUBAR_OBJECT_PATH",
                                                        "Contents of the _GTK_MENUBAR_OBJECT_PATH property of this window",
                                                        NULL,
                                                        G_PARAM_READABLE));

  window_signals[WORKSPACE_CHANGED] =
    g_signal_new ("workspace-changed",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (MetaWindowClass, workspace_changed),
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 1,
                  G_TYPE_INT);

  window_signals[FOCUS] =
    g_signal_new ("focus",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (MetaWindowClass, focus),
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);

  window_signals[RAISED] =
    g_signal_new ("raised",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (MetaWindowClass, raised),
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);

  window_signals[UNMANAGED] =
    g_signal_new ("unmanaged",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (MetaWindowClass, unmanaged),
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);
}

static void
meta_window_init (MetaWindow *self)
{
  meta_prefs_add_listener (prefs_changed_callback, self);
}

#ifdef WITH_VERBOSE_MODE
static const char*
wm_state_to_string (int state)
{
  switch (state)
    {
    case NormalState:
      return "NormalState";
    case IconicState:
      return "IconicState";
    case WithdrawnState:
      return "WithdrawnState";
    }

  return "Unknown";
}
#endif

static gboolean
is_desktop_or_dock_foreach (MetaWindow *window,
                            void       *data)
{
  gboolean *result = data;

  *result =
    window->type == META_WINDOW_DESKTOP ||
    window->type == META_WINDOW_DOCK;
  if (*result)
    return FALSE; /* stop as soon as we find one */
  else
    return TRUE;
}

/* window is the window that's newly mapped provoking
 * the possible change
 */
static void
maybe_leave_show_desktop_mode (MetaWindow *window)
{
  gboolean is_desktop_or_dock;

  if (!window->screen->active_workspace->showing_desktop)
    return;

  /* If the window is a transient for the dock or desktop, don't
   * leave show desktop mode when the window opens. That's
   * so you can e.g. hide all windows, manipulate a file on
   * the desktop via a dialog, then unshow windows again.
   */
  is_desktop_or_dock = FALSE;
  is_desktop_or_dock_foreach (window,
                              &is_desktop_or_dock);

  meta_window_foreach_ancestor (window, is_desktop_or_dock_foreach,
                                &is_desktop_or_dock);

  if (!is_desktop_or_dock)
    {
      meta_screen_minimize_all_on_active_workspace_except (window->screen,
                                                           window);
      meta_screen_unshow_desktop (window->screen);
    }
}

MetaWindow*
meta_window_new (MetaDisplay *display,
                 Window       xwindow,
                 gboolean     must_be_viewable)
{
  XWindowAttributes attrs;
  MetaWindow *window;

  meta_display_grab (display);
  meta_error_trap_push (display); /* Push a trap over all of window
                                   * creation, to reduce XSync() calls
                                   */

  meta_error_trap_push_with_return (display);

  if (XGetWindowAttributes (display->xdisplay,xwindow, &attrs))
   {
      if(meta_error_trap_pop_with_return (display) != Success)
       {
          meta_verbose ("Failed to get attributes for window 0x%lx\n",
                        xwindow);
          meta_error_trap_pop (display);
          meta_display_ungrab (display);
          return NULL;
       }
      window = meta_window_new_with_attrs (display, xwindow,
                                           must_be_viewable,
                                           META_COMP_EFFECT_CREATE,
                                           &attrs);
   }
  else
   {
         meta_error_trap_pop_with_return (display);
         meta_verbose ("Failed to get attributes for window 0x%lx\n",
                        xwindow);
         meta_error_trap_pop (display);
         meta_display_ungrab (display);
         return NULL;
   }


  meta_error_trap_pop (display);
  meta_display_ungrab (display);

  return window;
}

/* The MUTTER_WM_CLASS_FILTER environment variable is designed for
 * performance and regression testing environments where we want to do
 * tests with only a limited set of windows and ignore all other windows
 *
 * When it is set to a comma separated list of WM_CLASS class names, all
 * windows not matching the list will be ignored.
 *
 * Returns TRUE if window has been filtered out and should be ignored.
 */
static gboolean
maybe_filter_window (MetaDisplay       *display,
                     Window             xwindow,
                     gboolean           must_be_viewable,
                     XWindowAttributes *attrs)
{
  static char **filter_wm_classes = NULL;
  static gboolean initialized = FALSE;
  XClassHint class_hint;
  gboolean filtered;
  Status success;
  int i;

  if (!initialized)
    {
      const char *filter_string = g_getenv ("MUTTER_WM_CLASS_FILTER");
      if (filter_string)
        filter_wm_classes = g_strsplit (filter_string, ",", -1);
      initialized = TRUE;
    }

  if (!filter_wm_classes || !filter_wm_classes[0])
    return FALSE;

  filtered = TRUE;

  meta_error_trap_push (display);
  success = XGetClassHint (display->xdisplay, xwindow, &class_hint);

  if (success)
    {
      for (i = 0; filter_wm_classes[i]; i++)
        {
          if (strcmp (class_hint.res_class, filter_wm_classes[i]) == 0)
            {
              filtered = FALSE;
              break;
            }
        }

      XFree (class_hint.res_name);
      XFree (class_hint.res_class);
    }

  if (filtered)
    {
      /* We want to try and get the window managed by the next WM that come along,
       * so we need to make sure that windows that are requested to be mapped while
       * Mutter is running (!must_be_viewable), or windows already viewable at startup
       * get a non-withdrawn WM_STATE property. Previously unmapped windows are left
       * with whatever WM_STATE property they had.
       */
      if (!must_be_viewable || attrs->map_state == IsViewable)
        {
          gulong old_state;

          if (!meta_prop_get_cardinal_with_atom_type (display, xwindow,
                                                      display->atom_WM_STATE,
                                                      display->atom_WM_STATE,
                                                      &old_state))
            old_state = WithdrawnState;

          if (old_state == WithdrawnState)
            set_wm_state_on_xwindow (display, xwindow, NormalState);
        }

      /* Make sure filtered windows are hidden from view */
      XUnmapWindow (display->xdisplay, xwindow);
    }

  meta_error_trap_pop (display);

  return filtered;
}

gboolean
meta_window_should_attach_to_parent (MetaWindow *window)
{
  MetaWindow *parent;

  if (!meta_prefs_get_attach_modal_dialogs () ||
      window->type != META_WINDOW_MODAL_DIALOG)
    return FALSE;

  parent = meta_window_get_transient_for (window);
  if (!parent)
    return FALSE;

  switch (parent->type)
    {
    case META_WINDOW_NORMAL:
    case META_WINDOW_DIALOG:
    case META_WINDOW_MODAL_DIALOG:
      return TRUE;

    default:
      return FALSE;
    }
}

MetaWindow*
meta_window_new_with_attrs (MetaDisplay       *display,
                            Window             xwindow,
                            gboolean           must_be_viewable,
                            MetaCompEffect     effect,
                            XWindowAttributes *attrs)
{
  MetaWindow *window;
  GSList *tmp;
  MetaWorkspace *space;
  gulong existing_wm_state;
  gulong event_mask;
  MetaMoveResizeFlags flags;
  gboolean has_shape;
  MetaScreen *screen;

  g_assert (attrs != NULL);

  meta_verbose ("Attempting to manage 0x%lx\n", xwindow);

  if (meta_display_xwindow_is_a_no_focus_window (display, xwindow))
    {
      meta_verbose ("Not managing no_focus_window 0x%lx\n",
                    xwindow);
      return NULL;
    }

  screen = NULL;
  for (tmp = display->screens; tmp != NULL; tmp = tmp->next)
    {
      MetaScreen *scr = tmp->data;

      if (scr->xroot == attrs->root)
        {
          screen = tmp->data;
          break;
        }
    }

  g_assert (screen);

  /* A black list of override redirect windows that we don't need to manage: */
  if (attrs->override_redirect &&
      (xwindow == screen->no_focus_window ||
       xwindow == screen->flash_window ||
       xwindow == screen->wm_sn_selection_window ||
       attrs->class == InputOnly ||
       /* any windows created via meta_create_offscreen_window: */
       (attrs->x == -100 && attrs->y == -100
	&& attrs->width == 1 && attrs->height == 1) ||
       xwindow == screen->wm_cm_selection_window ||
       xwindow == screen->guard_window ||
       (display->compositor &&
        xwindow == XCompositeGetOverlayWindow (display->xdisplay,
					       screen->xroot)
       )
      )
     ) {
    meta_verbose ("Not managing our own windows\n");
    return NULL;
  }

  if (maybe_filter_window (display, xwindow, must_be_viewable, attrs))
    {
      meta_verbose ("Not managing filtered window\n");
      return NULL;
    }

  /* Grab server */
  meta_display_grab (display);
  meta_error_trap_push (display); /* Push a trap over all of window
                                   * creation, to reduce XSync() calls
                                   */

  meta_verbose ("must_be_viewable = %d attrs->map_state = %d (%s)\n",
                must_be_viewable,
                attrs->map_state,
                (attrs->map_state == IsUnmapped) ?
                "IsUnmapped" :
                (attrs->map_state == IsViewable) ?
                "IsViewable" :
                (attrs->map_state == IsUnviewable) ?
                "IsUnviewable" :
                "(unknown)");

  existing_wm_state = WithdrawnState;
  if (must_be_viewable && attrs->map_state != IsViewable)
    {
      /* Only manage if WM_STATE is IconicState or NormalState */
      gulong state;

      /* WM_STATE isn't a cardinal, it's type WM_STATE, but is an int */
      if (!(meta_prop_get_cardinal_with_atom_type (display, xwindow,
                                                   display->atom_WM_STATE,
                                                   display->atom_WM_STATE,
                                                   &state) &&
            (state == IconicState || state == NormalState)))
        {
          meta_verbose ("Deciding not to manage unmapped or unviewable window 0x%lx\n", xwindow);
          meta_error_trap_pop (display);
          meta_display_ungrab (display);
          return NULL;
        }

      existing_wm_state = state;
      meta_verbose ("WM_STATE of %lx = %s\n", xwindow,
                    wm_state_to_string (existing_wm_state));
    }

  meta_error_trap_push_with_return (display);

  /*
   * XAddToSaveSet can only be called on windows created by a different client.
   * with Mutter we want to be able to create manageable windows from within
   * the process (such as a dummy desktop window), so we do not want this
   * call failing to prevent the window from being managed -- wrap it in its
   * own error trap (we use the _with_return() version here to ensure that
   * XSync() is done on the pop, otherwise the error will not get caught).
   */
  meta_error_trap_push_with_return (display);
  XAddToSaveSet (display->xdisplay, xwindow);
  meta_error_trap_pop_with_return (display);

  event_mask =
    PropertyChangeMask | EnterWindowMask | LeaveWindowMask |
    FocusChangeMask | ColormapChangeMask;
  if (attrs->override_redirect)
    event_mask |= StructureNotifyMask;

  /* If the window is from this client (a menu, say) we need to augment
   * the event mask, not replace it. For windows from other clients,
   * attrs->your_event_mask will be empty at this point.
   */
  XSelectInput (display->xdisplay, xwindow, attrs->your_event_mask | event_mask);

  has_shape = FALSE;
#ifdef HAVE_SHAPE
  if (META_DISPLAY_HAS_SHAPE (display))
    {
      int x_bounding, y_bounding, x_clip, y_clip;
      unsigned w_bounding, h_bounding, w_clip, h_clip;
      int bounding_shaped, clip_shaped;

      XShapeSelectInput (display->xdisplay, xwindow, ShapeNotifyMask);

      XShapeQueryExtents (display->xdisplay, xwindow,
                          &bounding_shaped, &x_bounding, &y_bounding,
                          &w_bounding, &h_bounding,
                          &clip_shaped, &x_clip, &y_clip,
                          &w_clip, &h_clip);

      has_shape = bounding_shaped != FALSE;

      meta_topic (META_DEBUG_SHAPES,
                  "Window has_shape = %d extents %d,%d %u x %u\n",
                  has_shape, x_bounding, y_bounding,
                  w_bounding, h_bounding);
    }
#endif

  /* Get rid of any borders */
  if (attrs->border_width != 0)
    XSetWindowBorderWidth (display->xdisplay, xwindow, 0);

  /* Get rid of weird gravities */
  if (attrs->win_gravity != NorthWestGravity)
    {
      XSetWindowAttributes set_attrs;

      set_attrs.win_gravity = NorthWestGravity;

      XChangeWindowAttributes (display->xdisplay,
                               xwindow,
                               CWWinGravity,
                               &set_attrs);
    }

  if (meta_error_trap_pop_with_return (display) != Success)
    {
      meta_verbose ("Window 0x%lx disappeared just as we tried to manage it\n",
                    xwindow);
      meta_error_trap_pop (display);
      meta_display_ungrab (display);
      return NULL;
    }


  window = g_object_new (META_TYPE_WINDOW, NULL);

  window->constructing = TRUE;

  window->dialog_pid = -1;

  window->xwindow = xwindow;

  /* this is in window->screen->display, but that's too annoying to
   * type
   */
  window->display = display;
  window->workspace = NULL;

#ifdef HAVE_XSYNC
  window->sync_request_counter = None;
  window->sync_request_serial = 0;
  window->sync_request_time.tv_sec = 0;
  window->sync_request_time.tv_usec = 0;
#endif

  window->screen = screen;

  window->desc = g_strdup_printf ("0x%lx", window->xwindow);

  window->override_redirect = attrs->override_redirect;

  /* avoid tons of stack updates */
  meta_stack_freeze (window->screen->stack);

  window->has_shape = has_shape;

  window->rect.x = attrs->x;
  window->rect.y = attrs->y;
  window->rect.width = attrs->width;
  window->rect.height = attrs->height;

  /* And border width, size_hints are the "request" */
  window->border_width = attrs->border_width;
  window->size_hints.x = attrs->x;
  window->size_hints.y = attrs->y;
  window->size_hints.width = attrs->width;
  window->size_hints.height = attrs->height;
  /* initialize the remaining size_hints as if size_hints.flags were zero */
  meta_set_normal_hints (window, NULL);

  /* And this is our unmaximized size */
  window->saved_rect = window->rect;
  window->user_rect = window->rect;

  window->depth = attrs->depth;
  window->xvisual = attrs->visual;
  window->colormap = attrs->colormap;

  window->title = NULL;
  window->icon_name = NULL;
  window->icon = NULL;
  window->mini_icon = NULL;
  meta_icon_cache_init (&window->icon_cache);
  window->wm_hints_pixmap = None;
  window->wm_hints_mask = None;
  window->wm_hints_urgent = FALSE;

  window->frame = NULL;
  window->has_focus = FALSE;
  window->attached_focus_window = NULL;

  window->maximized_horizontally = FALSE;
  window->maximized_vertically = FALSE;
  window->maximize_horizontally_after_placement = FALSE;
  window->maximize_vertically_after_placement = FALSE;
  window->minimize_after_placement = FALSE;
  window->fullscreen = FALSE;
  window->fullscreen_after_placement = FALSE;
  window->fullscreen_monitors[0] = -1;
  window->require_fully_onscreen = TRUE;
  window->require_on_single_monitor = TRUE;
  window->require_titlebar_visible = TRUE;
  window->on_all_workspaces = FALSE;
  window->on_all_workspaces_requested = FALSE;
  window->tile_mode = META_TILE_NONE;
  window->tile_monitor_number = -1;
  window->shaded = FALSE;
  window->initially_iconic = FALSE;
  window->minimized = FALSE;
  window->tab_unminimized = FALSE;
  window->iconic = FALSE;
  window->mapped = attrs->map_state != IsUnmapped;
  window->hidden = FALSE;
  window->visible_to_compositor = FALSE;
  window->pending_compositor_effect = effect;
  /* if already mapped, no need to worry about focus-on-first-time-showing */
  window->showing_for_first_time = !window->mapped;
  /* if already mapped we don't want to do the placement thing;
   * override-redirect windows are placed by the app */
  window->placed = ((window->mapped && !window->hidden) || window->override_redirect);
  if (window->placed)
    meta_topic (META_DEBUG_PLACEMENT,
                "Not placing window 0x%lx since it's already mapped\n",
                xwindow);
  window->force_save_user_rect = TRUE;
  window->denied_focus_and_not_transient = FALSE;
  window->unmanaging = FALSE;
  window->is_in_queues = 0;
  window->keys_grabbed = FALSE;
  window->grab_on_frame = FALSE;
  window->all_keys_grabbed = FALSE;
  window->withdrawn = FALSE;
  window->initial_workspace_set = FALSE;
  window->initial_timestamp_set = FALSE;
  window->net_wm_user_time_set = FALSE;
  window->user_time_window = None;
  window->take_focus = FALSE;
  window->delete_window = FALSE;
  window->net_wm_ping = FALSE;
  window->input = TRUE;
  window->calc_placement = FALSE;
  window->shaken_loose = FALSE;
  window->have_focus_click_grab = FALSE;
  window->disable_sync = FALSE;

  window->unmaps_pending = 0;

  window->mwm_decorated = TRUE;
  window->mwm_border_only = FALSE;
  window->mwm_has_close_func = TRUE;
  window->mwm_has_minimize_func = TRUE;
  window->mwm_has_maximize_func = TRUE;
  window->mwm_has_move_func = TRUE;
  window->mwm_has_resize_func = TRUE;

  window->decorated = TRUE;
  window->has_close_func = TRUE;
  window->has_minimize_func = TRUE;
  window->has_maximize_func = TRUE;
  window->has_move_func = TRUE;
  window->has_resize_func = TRUE;

  window->has_shade_func = TRUE;

  window->has_fullscreen_func = TRUE;

  window->always_sticky = FALSE;

  window->wm_state_modal = FALSE;
  window->skip_taskbar = FALSE;
  window->skip_pager = FALSE;
  window->wm_state_skip_taskbar = FALSE;
  window->wm_state_skip_pager = FALSE;
  window->wm_state_above = FALSE;
  window->wm_state_below = FALSE;
  window->wm_state_demands_attention = FALSE;

  window->res_class = NULL;
  window->res_name = NULL;
  window->role = NULL;
  window->sm_client_id = NULL;
  window->wm_client_machine = NULL;
  window->startup_id = NULL;

  window->net_wm_pid = -1;

  window->xtransient_for = None;
  window->xclient_leader = None;
  window->transient_parent_is_root_window = FALSE;

  window->type = META_WINDOW_NORMAL;
  window->type_atom = None;

  window->struts = NULL;

  window->using_net_wm_name              = FALSE;
  window->using_net_wm_visible_name      = FALSE;
  window->using_net_wm_icon_name         = FALSE;
  window->using_net_wm_visible_icon_name = FALSE;

  window->need_reread_icon = TRUE;

  window->layer = META_LAYER_LAST; /* invalid value */
  window->stack_position = -1;
  window->initial_workspace = 0; /* not used */
  window->initial_timestamp = 0; /* not used */

  window->compositor_private = NULL;

  window->monitor = meta_screen_get_monitor_for_window (window->screen, window);

  window->tile_match = NULL;

  if (window->override_redirect)
    {
      window->decorated = FALSE;
      window->always_sticky = TRUE;
      window->has_close_func = FALSE;
      window->has_shade_func = FALSE;
      window->has_move_func = FALSE;
      window->has_resize_func = FALSE;
    }

  meta_display_register_x_window (display, &window->xwindow, window);

  /* Assign this #MetaWindow a sequence number which can be used
   * for sorting.
   */
  window->stable_sequence = ++display->window_sequence_counter;

  /* assign the window to its group, or create a new group if needed
   */
  window->group = NULL;
  window->xgroup_leader = None;
  meta_window_compute_group (window);

  meta_window_load_initial_properties (window);

  if (!window->override_redirect)
    {
      update_sm_hints (window); /* must come after transient_for */

      meta_window_update_role (window);
    }

  meta_window_update_net_wm_type (window);

  if (!window->override_redirect)
    meta_window_update_icon_now (window);

  if (window->initially_iconic)
    {
      /* WM_HINTS said minimized */
      window->minimized = TRUE;
      meta_verbose ("Window %s asked to start out minimized\n", window->desc);
    }

  if (existing_wm_state == IconicState)
    {
      /* WM_STATE said minimized */
      window->minimized = TRUE;
      meta_verbose ("Window %s had preexisting WM_STATE = IconicState, minimizing\n",
                    window->desc);

      /* Assume window was previously placed, though perhaps it's
       * been iconic its whole life, we have no way of knowing.
       */
      window->placed = TRUE;
    }

  /* Apply any window attributes such as initial workspace
   * based on startup notification
   */
  meta_screen_apply_startup_properties (window->screen, window);

  /* Try to get a "launch timestamp" for the window.  If the window is
   * a transient, we'd like to be able to get a last-usage timestamp
   * from the parent window.  If the window has no parent, there isn't
   * much we can do...except record the current time so that any children
   * can use this time as a fallback.
   */
  if (!window->override_redirect && !window->net_wm_user_time_set) {
    MetaWindow *parent = NULL;
    if (window->xtransient_for)
      parent = meta_display_lookup_x_window (window->display,
                                             window->xtransient_for);

    /* First, maybe the app was launched with startup notification using an
     * obsolete version of the spec; use that timestamp if it exists.
     */
    if (window->initial_timestamp_set)
      /* NOTE: Do NOT toggle net_wm_user_time_set to true; this is just
       * being recorded as a fallback for potential transients
       */
      window->net_wm_user_time = window->initial_timestamp;
    else if (parent != NULL)
      meta_window_set_user_time(window, parent->net_wm_user_time);
    else
      /* NOTE: Do NOT toggle net_wm_user_time_set to true; this is just
       * being recorded as a fallback for potential transients
       */
      window->net_wm_user_time =
        meta_display_get_current_time_roundtrip (window->display);
  }

  window->attached = meta_window_should_attach_to_parent (window);
  if (window->attached)
    recalc_window_features (window);

  if (window->decorated)
    meta_window_ensure_frame (window);

  meta_window_grab_keys (window);
  if (window->type != META_WINDOW_DOCK && !window->override_redirect)
    {
      meta_display_grab_window_buttons (window->display, window->xwindow);
      meta_display_grab_focus_window_button (window->display, window);
    }

  if (window->type == META_WINDOW_DESKTOP ||
      window->type == META_WINDOW_DOCK)
    {
      /* Change the default, but don't enforce this if the user
       * focuses the dock/desktop and unsticks it using key shortcuts.
       * Need to set this before adding to the workspaces so the MRU
       * lists will be updated.
       */
      window->on_all_workspaces_requested = TRUE;
    }

  window->on_all_workspaces = should_be_on_all_workspaces (window);

  /* For the workspace, first honor hints,
   * if that fails put transients with parents,
   * otherwise put window on active space
   */

  if (window->initial_workspace_set)
    {
      if (window->initial_workspace == (int) 0xFFFFFFFF)
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Window %s is initially on all spaces\n",
                      window->desc);

	  /* need to set on_all_workspaces first so that it will be
	   * added to all the MRU lists
	   */
          window->on_all_workspaces_requested = TRUE;
          window->on_all_workspaces = TRUE;
          meta_workspace_add_window (window->screen->active_workspace, window);
        }
      else
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Window %s is initially on space %d\n",
                      window->desc, window->initial_workspace);

          space =
            meta_screen_get_workspace_by_index (window->screen,
                                                window->initial_workspace);

          if (space)
            meta_workspace_add_window (space, window);
        }
    }

  /* override-redirect windows are subtly different from other windows
   * with window->on_all_workspaces == TRUE. Other windows are part of
   * some workspace (so they can return to that if the flag is turned off),
   * but appear on other workspaces. override-redirect windows are part
   * of no workspace.
   */
  if (!window->override_redirect)
    {
      if (window->workspace == NULL &&
          window->xtransient_for != None)
        {
          /* Try putting dialog on parent's workspace */
          MetaWindow *parent;

          parent = meta_display_lookup_x_window (window->display,
                                                 window->xtransient_for);

          if (parent && parent->workspace)
            {
              meta_topic (META_DEBUG_PLACEMENT,
                          "Putting window %s on same workspace as parent %s\n",
                          window->desc, parent->desc);

              if (parent->on_all_workspaces_requested)
                {
                  window->on_all_workspaces_requested = TRUE;
                  window->on_all_workspaces = TRUE;
                }

              /* this will implicitly add to the appropriate MRU lists
               */
              meta_workspace_add_window (parent->workspace, window);
            }
        }

      if (window->workspace == NULL)
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Putting window %s on active workspace\n",
                      window->desc);

          space = window->screen->active_workspace;

          meta_workspace_add_window (space, window);
        }

      /* for the various on_all_workspaces = TRUE possible above */
      meta_window_set_current_workspace_hint (window);

      meta_window_update_struts (window);
    }

  g_signal_emit_by_name (window->screen, "window-entered-monitor", window->monitor->number, window);

  /* Must add window to stack before doing move/resize, since the
   * window might have fullscreen size (i.e. should have been
   * fullscreen'd; acrobat is one such braindead case; it withdraws
   * and remaps its window whenever trying to become fullscreen...)
   * and thus constraints may try to auto-fullscreen it which also
   * means restacking it.
   */
  if (!window->override_redirect)
    meta_stack_add (window->screen->stack,
                    window);
  else
    window->layer = META_LAYER_OVERRIDE_REDIRECT; /* otherwise set by MetaStack */

  /* Put our state back where it should be,
   * passing TRUE for is_configure_request, ICCCM says
   * initial map is handled same as configure request
   */
  flags =
    META_IS_CONFIGURE_REQUEST | META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION;
  if (!window->override_redirect)
    meta_window_move_resize_internal (window,
                                      flags,
                                      window->size_hints.win_gravity,
                                      window->size_hints.x,
                                      window->size_hints.y,
                                      window->size_hints.width,
                                      window->size_hints.height);

  /* Now try applying saved stuff from the session */
  {
    const MetaWindowSessionInfo *info;

    info = meta_window_lookup_saved_state (window);

    if (info)
      {
        meta_window_apply_session_info (window, info);
        meta_window_release_saved_state (info);
      }
  }

  if (!window->override_redirect)
    {
      /* FIXME we have a tendency to set this then immediately
       * change it again.
       */
      set_wm_state (window, window->iconic ? IconicState : NormalState);
      set_net_wm_state (window);
    }

  if (screen->display->compositor)
    meta_compositor_add_window (screen->display->compositor, window);

  /* Sync stack changes */
  meta_stack_thaw (window->screen->stack);

  /* Usually the we'll have queued a stack sync anyways, because we've
   * added a new frame window or restacked. But if an undecorated
   * window is mapped, already stacked in the right place, then we
   * might need to do this explicitly.
   */
  meta_stack_tracker_queue_sync_stack (window->screen->stack_tracker);

  /* disable show desktop mode unless we're a desktop component */
  maybe_leave_show_desktop_mode (window);

  meta_window_queue (window, META_QUEUE_CALC_SHOWING);
  /* See bug 303284; a transient of the given window can already exist, in which
   * case we think it should probably be shown.
   */
  meta_window_foreach_transient (window,
                                 queue_calc_showing_func,
                                 NULL);
  /* See bug 334899; the window may have minimized ancestors
   * which need to be shown.
   *
   * However, we shouldn't unminimize windows here when opening
   * a new display because that breaks passing _NET_WM_STATE_HIDDEN
   * between window managers when replacing them; see bug 358042.
   *
   * And we shouldn't unminimize windows if they were initially
   * iconic.
   */
  if (!window->override_redirect &&
      !display->display_opening &&
      !window->initially_iconic)
    unminimize_window_and_all_transient_parents (window);

  meta_error_trap_pop (display); /* pop the XSync()-reducing trap */
  meta_display_ungrab (display);

  window->constructing = FALSE;

  meta_display_notify_window_created (display, window);

  if (window->wm_state_demands_attention)
    g_signal_emit_by_name (window->display, "window-demands-attention", window);

  if (window->wm_hints_urgent)
    g_signal_emit_by_name (window->display, "window-marked-urgent", window);

  return window;
}

/* This function should only be called from the end of meta_window_new_with_attrs () */
static void
meta_window_apply_session_info (MetaWindow *window,
                                const MetaWindowSessionInfo *info)
{
  if (info->stack_position_set)
    {
      meta_topic (META_DEBUG_SM,
                  "Restoring stack position %d for window %s\n",
                  info->stack_position, window->desc);

      /* FIXME well, I'm not sure how to do this. */
    }

  if (info->minimized_set)
    {
      meta_topic (META_DEBUG_SM,
                  "Restoring minimized state %d for window %s\n",
                  info->minimized, window->desc);

      if (window->has_minimize_func && info->minimized)
        meta_window_minimize (window);
    }

  if (info->maximized_set)
    {
      meta_topic (META_DEBUG_SM,
                  "Restoring maximized state %d for window %s\n",
                  info->maximized, window->desc);

      if (window->has_maximize_func && info->maximized)
        {
          meta_window_maximize (window,
                                META_MAXIMIZE_HORIZONTAL |
                                META_MAXIMIZE_VERTICAL);

          if (info->saved_rect_set)
            {
              meta_topic (META_DEBUG_SM,
                          "Restoring saved rect %d,%d %dx%d for window %s\n",
                          info->saved_rect.x,
                          info->saved_rect.y,
                          info->saved_rect.width,
                          info->saved_rect.height,
                          window->desc);

              window->saved_rect.x = info->saved_rect.x;
              window->saved_rect.y = info->saved_rect.y;
              window->saved_rect.width = info->saved_rect.width;
              window->saved_rect.height = info->saved_rect.height;
            }
	}
    }

  if (info->on_all_workspaces_set)
    {
      window->on_all_workspaces_requested = info->on_all_workspaces;
      meta_window_update_on_all_workspaces (window);
      meta_topic (META_DEBUG_SM,
                  "Restoring sticky state %d for window %s\n",
                  window->on_all_workspaces_requested, window->desc);
    }

  if (info->workspace_indices)
    {
      GSList *tmp;
      GSList *spaces;

      spaces = NULL;

      tmp = info->workspace_indices;
      while (tmp != NULL)
        {
          MetaWorkspace *space;

          space =
            meta_screen_get_workspace_by_index (window->screen,
                                                GPOINTER_TO_INT (tmp->data));

          if (space)
            spaces = g_slist_prepend (spaces, space);

          tmp = tmp->next;
        }

      if (spaces)
        {
          /* This briefly breaks the invariant that we are supposed
           * to always be on some workspace. But we paranoically
           * ensured that one of the workspaces from the session was
           * indeed valid, so we know we'll go right back to one.
           */
          if (window->workspace)
            meta_workspace_remove_window (window->workspace, window);

          /* Only restore to the first workspace if the window
           * happened to be on more than one, since we have replaces
           * window->workspaces with window->workspace
           */
          meta_workspace_add_window (spaces->data, window);

          meta_topic (META_DEBUG_SM,
                      "Restoring saved window %s to workspace %d\n",
                      window->desc,
                      meta_workspace_index (spaces->data));

          g_slist_free (spaces);
        }
    }

  if (info->geometry_set)
    {
      int x, y, w, h;
      MetaMoveResizeFlags flags;

      window->placed = TRUE; /* don't do placement algorithms later */

      x = info->rect.x;
      y = info->rect.y;

      w = window->size_hints.base_width +
        info->rect.width * window->size_hints.width_inc;
      h = window->size_hints.base_height +
        info->rect.height * window->size_hints.height_inc;

      /* Force old gravity, ignoring anything now set */
      window->size_hints.win_gravity = info->gravity;

      meta_topic (META_DEBUG_SM,
                  "Restoring pos %d,%d size %d x %d for %s\n",
                  x, y, w, h, window->desc);

      flags = META_DO_GRAVITY_ADJUST | META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION;
      meta_window_move_resize_internal (window,
                                        flags,
                                        window->size_hints.win_gravity,
                                        x, y, w, h);
    }
}

static gboolean
detach_foreach_func (MetaWindow *window,
                     void       *data)
{
  GList **children = data;
  MetaWindow *parent;

  if (window->attached)
    {
      /* Only return the immediate children of the window being unmanaged */
      parent = meta_window_get_transient_for (window);
      if (parent->unmanaging)
        *children = g_list_prepend (*children, window);
    }

  return TRUE;
}

void
meta_window_unmanage (MetaWindow  *window,
                      guint32      timestamp)
{
  GList *tmp;

  meta_verbose ("Unmanaging 0x%lx\n", window->xwindow);

  if (window->display->compositor)
    {
      if (window->visible_to_compositor)
        meta_compositor_hide_window (window->display->compositor, window,
                                     META_COMP_EFFECT_DESTROY);

      meta_compositor_remove_window (window->display->compositor, window);
    }

  if (window->display->window_with_menu == window)
    {
      meta_ui_window_menu_free (window->display->window_menu);
      window->display->window_menu = NULL;
      window->display->window_with_menu = NULL;
    }

  if (destroying_windows_disallowed > 0)
    meta_bug ("Tried to destroy window %s while destruction was not allowed\n",
              window->desc);

  window->unmanaging = TRUE;

  if (meta_prefs_get_attach_modal_dialogs ())
    {
      GList *attached_children = NULL, *iter;

      /* Detach any attached dialogs by unmapping and letting them
       * be remapped after @window is destroyed.
       */
      meta_window_foreach_transient (window,
                                     detach_foreach_func,
                                     &attached_children);
      for (iter = attached_children; iter; iter = iter->next)
        meta_window_unmanage (iter->data, timestamp);
      g_list_free (attached_children);
    }

  if (window->fullscreen)
    {
      MetaGroup *group;

      /* If the window is fullscreen, it may be forcing
       * other windows in its group to a higher layer
       */

      meta_stack_freeze (window->screen->stack);
      group = meta_window_get_group (window);
      if (group)
        meta_group_update_layers (group);
      meta_stack_thaw (window->screen->stack);
    }

  meta_window_shutdown_group (window); /* safe to do this early as
                                        * group.c won't re-add to the
                                        * group if window->unmanaging
                                        */

  /* If we have the focus, focus some other window.
   * This is done first, so that if the unmap causes
   * an EnterNotify the EnterNotify will have final say
   * on what gets focused, maintaining sloppy focus
   * invariants.
   */
  if (meta_window_appears_focused (window))
    meta_window_propagate_focus_appearance (window, FALSE);
  if (window->has_focus)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Focusing default window since we're unmanaging %s\n",
                  window->desc);
      meta_workspace_focus_default_window (window->screen->active_workspace,
                                           window,
                                           timestamp);
    }
  else if (window->display->expected_focus_window == window)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Focusing default window since expected focus window freed %s\n",
                  window->desc);
      window->display->expected_focus_window = NULL;
      meta_workspace_focus_default_window (window->screen->active_workspace,
                                           window,
                                           timestamp);
    }
  else
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Unmanaging window %s which doesn't currently have focus\n",
                  window->desc);
    }

  if (window->struts)
    {
      meta_free_gslist_and_elements (window->struts);
      window->struts = NULL;

      meta_topic (META_DEBUG_WORKAREA,
                  "Unmanaging window %s which has struts, so invalidating work areas\n",
                  window->desc);
      invalidate_work_areas (window);
    }

  if (window->display->grab_window == window)
    meta_display_end_grab_op (window->display, timestamp);

  g_assert (window->display->grab_window != window);

  if (window->display->focus_window == window)
    {
      window->display->focus_window = NULL;
      g_object_notify (G_OBJECT (window->display), "focus-window");
    }

  if (window->maximized_horizontally || window->maximized_vertically)
    unmaximize_window_before_freeing (window);

  /* The XReparentWindow call in meta_window_destroy_frame() moves the
   * window so we need to send a configure notify; see bug 399552.  (We
   * also do this just in case a window got unmaximized.)
   */
  send_configure_notify (window);

  meta_window_unqueue (window, META_QUEUE_CALC_SHOWING |
                               META_QUEUE_MOVE_RESIZE |
                               META_QUEUE_UPDATE_ICON);
  meta_window_free_delete_dialog (window);

  if (window->workspace)
    meta_workspace_remove_window (window->workspace, window);

  g_assert (window->workspace == NULL);

#ifndef G_DISABLE_CHECKS
  tmp = window->screen->workspaces;
  while (tmp != NULL)
    {
      MetaWorkspace *workspace = tmp->data;

      g_assert (g_list_find (workspace->windows, window) == NULL);
      g_assert (g_list_find (workspace->mru_list, window) == NULL);

      tmp = tmp->next;
    }
#endif

  if (window->monitor)
    {
      g_signal_emit_by_name (window->screen, "window-left-monitor",
                             window->monitor->number, window);
      window->monitor = NULL;
    }

  if (!window->override_redirect)
    meta_stack_remove (window->screen->stack, window);

  if (window->frame)
    meta_window_destroy_frame (window);

  /* If an undecorated window is being withdrawn, that will change the
   * stack as presented to the compositing manager, without actually
   * changing the stacking order of X windows.
   */
  meta_stack_tracker_queue_sync_stack (window->screen->stack_tracker);

  if (window->withdrawn)
    {
      /* We need to clean off the window's state so it
       * won't be restored if the app maps it again.
       */
      meta_error_trap_push (window->display);
      meta_verbose ("Cleaning state from window %s\n", window->desc);
      XDeleteProperty (window->display->xdisplay,
                       window->xwindow,
                       window->display->atom__NET_WM_DESKTOP);
      XDeleteProperty (window->display->xdisplay,
                       window->xwindow,
                       window->display->atom__NET_WM_STATE);
      XDeleteProperty (window->display->xdisplay,
                       window->xwindow,
                       window->display->atom__NET_WM_FULLSCREEN_MONITORS);
      set_wm_state (window, WithdrawnState);
      meta_error_trap_pop (window->display);
    }
  else
    {
      /* We need to put WM_STATE so that others will understand it on
       * restart.
       */
      if (!window->minimized)
        {
          meta_error_trap_push (window->display);
          set_wm_state (window, NormalState);
          meta_error_trap_pop (window->display);
        }

      /* If we're unmanaging a window that is not withdrawn, then
       * either (a) mutter is exiting, in which case we need to map
       * the window so the next WM will know that it's not Withdrawn,
       * or (b) we want to create a new MetaWindow to replace the
       * current one, which will happen automatically if we re-map
       * the X Window.
       */
      meta_error_trap_push (window->display);
      XMapWindow (window->display->xdisplay,
                  window->xwindow);
      meta_error_trap_pop (window->display);
    }

  meta_window_ungrab_keys (window);
  meta_display_ungrab_window_buttons (window->display, window->xwindow);
  meta_display_ungrab_focus_window_button (window->display, window);

  meta_display_unregister_x_window (window->display, window->xwindow);


  meta_error_trap_push (window->display);

  /* Put back anything we messed up */
  if (window->border_width != 0)
    XSetWindowBorderWidth (window->display->xdisplay,
                           window->xwindow,
                           window->border_width);

  /* No save set */
  XRemoveFromSaveSet (window->display->xdisplay,
                      window->xwindow);

  /* Even though the window is now unmanaged, we can't unselect events. This
   * window might be a window from this process, like a GdkMenu, in
   * which case it will have pointer events and so forth selected
   * for it by GDK. There's no way to disentangle those events from the events
   * we've selected. Even for a window from a different X client,
   * GDK could also have selected events for it for IPC purposes, so we
   * can't unselect in that case either.
   *
   * Similarly, we can't unselected for events on window->user_time_window.
   * It might be our own GDK focus window, or it might be a window that a
   * different client is using for multiple different things:
   * _NET_WM_USER_TIME_WINDOW and IPC, perhaps.
   */

  if (window->user_time_window != None)
    {
      meta_display_unregister_x_window (window->display,
                                        window->user_time_window);
      window->user_time_window = None;
    }

#ifdef HAVE_SHAPE
  if (META_DISPLAY_HAS_SHAPE (window->display))
    XShapeSelectInput (window->display->xdisplay, window->xwindow, NoEventMask);
#endif

  meta_error_trap_pop (window->display);

  meta_prefs_remove_listener (prefs_changed_callback, window);

  g_signal_emit (window, window_signals[UNMANAGED], 0);

  g_object_unref (window);
}

static gboolean
should_be_on_all_workspaces (MetaWindow *window)
{
  return
    window->on_all_workspaces_requested ||
    window->override_redirect ||
    (meta_prefs_get_workspaces_only_on_primary () &&
     !meta_window_is_on_primary_monitor (window));
}

void
meta_window_update_on_all_workspaces (MetaWindow *window)
{
  gboolean old_value;

  old_value = window->on_all_workspaces;

  window->on_all_workspaces = should_be_on_all_workspaces (window);

  if (window->on_all_workspaces != old_value &&
      !window->override_redirect)
    {
      if (window->on_all_workspaces)
        {
          GList* tmp = window->screen->workspaces;

          /* Add to all MRU lists */
          while (tmp)
            {
              MetaWorkspace* work = (MetaWorkspace*) tmp->data;
              if (!g_list_find (work->mru_list, window))
                work->mru_list = g_list_prepend (work->mru_list, window);

              tmp = tmp->next;
            }
        }
      else
        {
          GList* tmp = window->screen->workspaces;

          /* Remove from MRU lists except the window's workspace */
          while (tmp)
            {
              MetaWorkspace* work = (MetaWorkspace*) tmp->data;
              if (work != window->workspace)
                work->mru_list = g_list_remove (work->mru_list, window);
              tmp = tmp->next;
            }
        }
      meta_window_set_current_workspace_hint (window);
    }
}

static void
set_wm_state_on_xwindow (MetaDisplay *display,
                         Window       xwindow,
                         int          state)
{
  unsigned long data[2];

  /* Mutter doesn't use icon windows, so data[1] should be None
   * according to the ICCCM 2.0 Section 4.1.3.1.
   */
  data[0] = state;
  data[1] = None;

  meta_error_trap_push (display);
  XChangeProperty (display->xdisplay, xwindow,
                   display->atom_WM_STATE,
                   display->atom_WM_STATE,
                   32, PropModeReplace, (guchar*) data, 2);
  meta_error_trap_pop (display);
}

static void
set_wm_state (MetaWindow *window,
              int         state)
{
  meta_verbose ("Setting wm state %s on %s\n",
                wm_state_to_string (state), window->desc);

  set_wm_state_on_xwindow (window->display, window->xwindow, state);
}

static void
set_net_wm_state (MetaWindow *window)
{
  int i;
  unsigned long data[13];

  i = 0;
  if (window->shaded)
    {
      data[i] = window->display->atom__NET_WM_STATE_SHADED;
      ++i;
    }
  if (window->wm_state_modal)
    {
      data[i] = window->display->atom__NET_WM_STATE_MODAL;
      ++i;
    }
  if (window->skip_pager)
    {
      data[i] = window->display->atom__NET_WM_STATE_SKIP_PAGER;
      ++i;
    }
  if (window->skip_taskbar)
    {
      data[i] = window->display->atom__NET_WM_STATE_SKIP_TASKBAR;
      ++i;
    }
  if (window->maximized_horizontally)
    {
      data[i] = window->display->atom__NET_WM_STATE_MAXIMIZED_HORZ;
      ++i;
    }
  if (window->maximized_vertically)
    {
      data[i] = window->display->atom__NET_WM_STATE_MAXIMIZED_VERT;
      ++i;
    }
  if (window->fullscreen)
    {
      data[i] = window->display->atom__NET_WM_STATE_FULLSCREEN;
      ++i;
    }
  if (!meta_window_showing_on_its_workspace (window) || window->shaded)
    {
      data[i] = window->display->atom__NET_WM_STATE_HIDDEN;
      ++i;
    }
  if (window->wm_state_above)
    {
      data[i] = window->display->atom__NET_WM_STATE_ABOVE;
      ++i;
    }
  if (window->wm_state_below)
    {
      data[i] = window->display->atom__NET_WM_STATE_BELOW;
      ++i;
    }
  if (window->wm_state_demands_attention)
    {
      data[i] = window->display->atom__NET_WM_STATE_DEMANDS_ATTENTION;
      ++i;
    }
  if (window->on_all_workspaces_requested)
    {
      data[i] = window->display->atom__NET_WM_STATE_STICKY;
      ++i;
    }
  if (meta_window_appears_focused (window))
    {
      data[i] = window->display->atom__NET_WM_STATE_FOCUSED;
      ++i;
    }

  meta_verbose ("Setting _NET_WM_STATE with %d atoms\n", i);

  meta_error_trap_push (window->display);
  XChangeProperty (window->display->xdisplay, window->xwindow,
                   window->display->atom__NET_WM_STATE,
                   XA_ATOM,
                   32, PropModeReplace, (guchar*) data, i);
  meta_error_trap_pop (window->display);

  if (window->fullscreen)
    {
      data[0] = window->fullscreen_monitors[0];
      data[1] = window->fullscreen_monitors[1];
      data[2] = window->fullscreen_monitors[2];
      data[3] = window->fullscreen_monitors[3];

      meta_verbose ("Setting _NET_WM_FULLSCREEN_MONITORS\n");
      meta_error_trap_push (window->display);
      XChangeProperty (window->display->xdisplay,
                       window->xwindow,
                       window->display->atom__NET_WM_FULLSCREEN_MONITORS,
                       XA_CARDINAL, 32, PropModeReplace,
                       (guchar*) data, 4);
      meta_error_trap_pop (window->display);
    }
}

gboolean
meta_window_located_on_workspace (MetaWindow    *window,
                                  MetaWorkspace *workspace)
{
  return (window->on_all_workspaces && window->screen == workspace->screen) ||
    (window->workspace == workspace);
}

static gboolean
is_minimized_foreach (MetaWindow *window,
                      void       *data)
{
  gboolean *result = data;

  *result = window->minimized;
  if (*result)
    return FALSE; /* stop as soon as we find one */
  else
    return TRUE;
}

static gboolean
ancestor_is_minimized (MetaWindow *window)
{
  gboolean is_minimized;

  is_minimized = FALSE;

  meta_window_foreach_ancestor (window, is_minimized_foreach, &is_minimized);

  return is_minimized;
}

/**
 * meta_window_showing_on_its_workspace:
 * @window: A #MetaWindow
 *
 * Returns: %TRUE if window would be visible, if its workspace was current
 */
gboolean
meta_window_showing_on_its_workspace (MetaWindow *window)
{
  gboolean showing;
  gboolean is_desktop_or_dock;
  MetaWorkspace* workspace_of_window;

  showing = TRUE;

  /* 1. See if we're minimized */
  if (window->minimized)
    showing = FALSE;

  /* 2. See if we're in "show desktop" mode */
  is_desktop_or_dock = FALSE;
  is_desktop_or_dock_foreach (window,
                              &is_desktop_or_dock);

  meta_window_foreach_ancestor (window, is_desktop_or_dock_foreach,
                                &is_desktop_or_dock);

  if (window->on_all_workspaces)
    workspace_of_window = window->screen->active_workspace;
  else if (window->workspace)
    workspace_of_window = window->workspace;
  else /* This only seems to be needed for startup */
    workspace_of_window = NULL;

  if (showing &&
      workspace_of_window && workspace_of_window->showing_desktop &&
      !is_desktop_or_dock)
    {
      meta_verbose ("We're showing the desktop on the workspace(s) that window %s is on\n",
                    window->desc);
      showing = FALSE;
    }

  /* 3. See if an ancestor is minimized (note that
   *    ancestor's "mapped" field may not be up to date
   *    since it's being computed in this same idle queue)
   */

  if (showing)
    {
      if (ancestor_is_minimized (window))
        showing = FALSE;
    }

  return showing;
}

gboolean
meta_window_should_be_showing (MetaWindow  *window)
{
  gboolean on_workspace;

  meta_verbose ("Should be showing for window %s\n", window->desc);

  /* See if we're on the workspace */
  on_workspace = meta_window_located_on_workspace (window,
                                                   window->screen->active_workspace);

  if (!on_workspace)
    meta_verbose ("Window %s is not on workspace %d\n",
                  window->desc,
                  meta_workspace_index (window->screen->active_workspace));
  else
    meta_verbose ("Window %s is on the active workspace %d\n",
                  window->desc,
                  meta_workspace_index (window->screen->active_workspace));

  if (window->on_all_workspaces)
    meta_verbose ("Window %s is on all workspaces\n", window->desc);

  return on_workspace && meta_window_showing_on_its_workspace (window);
}

static void
implement_showing (MetaWindow *window,
                   gboolean    showing)
{
  /* Actually show/hide the window */
  meta_verbose ("Implement showing = %d for window %s\n",
                showing, window->desc);

  if (!showing)
    {
      /* When we manage a new window, we normally delay placing it
       * until it is is first shown, but if we're previewing hidden
       * windows we might want to know where they are on the screen,
       * so we should place the window even if we're hiding it rather
       * than showing it.
       */
      if (!window->placed)
        meta_window_force_placement (window);

      meta_window_hide (window);
    }
  else
    meta_window_show (window);

  window->pending_compositor_effect = META_COMP_EFFECT_NONE;
}

void
meta_window_calc_showing (MetaWindow  *window)
{
  implement_showing (window, meta_window_should_be_showing (window));
}

static guint queue_later[NUMBER_OF_QUEUES] = {0, 0, 0};
static GSList *queue_pending[NUMBER_OF_QUEUES] = {NULL, NULL, NULL};

static int
stackcmp (gconstpointer a, gconstpointer b)
{
  MetaWindow *aw = (gpointer) a;
  MetaWindow *bw = (gpointer) b;

  if (aw->screen != bw->screen)
    return 0; /* don't care how they sort with respect to each other */
  else
    return meta_stack_windows_cmp (aw->screen->stack,
                                   aw, bw);
}

static gboolean
idle_calc_showing (gpointer data)
{
  GSList *tmp;
  GSList *copy;
  GSList *should_show;
  GSList *should_hide;
  GSList *unplaced;
  GSList *displays;
  MetaWindow *first_window;
  guint queue_index = GPOINTER_TO_INT (data);

  g_return_val_if_fail (queue_pending[queue_index] != NULL, FALSE);

  meta_topic (META_DEBUG_WINDOW_STATE,
              "Clearing the calc_showing queue\n");

  /* Work with a copy, for reentrancy. The allowed reentrancy isn't
   * complete; destroying a window while we're in here would result in
   * badness. But it's OK to queue/unqueue calc_showings.
   */
  copy = g_slist_copy (queue_pending[queue_index]);
  g_slist_free (queue_pending[queue_index]);
  queue_pending[queue_index] = NULL;
  queue_later[queue_index] = 0;

  destroying_windows_disallowed += 1;

  /* We map windows from top to bottom and unmap from bottom to
   * top, to avoid extra expose events. The exception is
   * for unplaced windows, which have to be mapped from bottom to
   * top so placement works.
   */
  should_show = NULL;
  should_hide = NULL;
  unplaced = NULL;
  displays = NULL;

  tmp = copy;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      if (!window->placed)
        unplaced = g_slist_prepend (unplaced, window);
      else if (meta_window_should_be_showing (window))
        should_show = g_slist_prepend (should_show, window);
      else
        should_hide = g_slist_prepend (should_hide, window);

      tmp = tmp->next;
    }

  /* bottom to top */
  unplaced = g_slist_sort (unplaced, stackcmp);
  should_hide = g_slist_sort (should_hide, stackcmp);
  /* top to bottom */
  should_show = g_slist_sort (should_show, stackcmp);
  should_show = g_slist_reverse (should_show);

  first_window = copy->data;

  meta_display_grab (first_window->display);

  tmp = unplaced;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      meta_window_calc_showing (window);

      tmp = tmp->next;
    }

  tmp = should_show;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      implement_showing (window, TRUE);

      tmp = tmp->next;
    }

  tmp = should_hide;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      implement_showing (window, FALSE);

      tmp = tmp->next;
    }

  tmp = copy;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      /* important to set this here for reentrancy -
       * if we queue a window again while it's in "copy",
       * then queue_calc_showing will just return since
       * we are still in the calc_showing queue
       */
      window->is_in_queues &= ~META_QUEUE_CALC_SHOWING;

      tmp = tmp->next;
    }

  if (meta_prefs_get_focus_mode () != G_DESKTOP_FOCUS_MODE_CLICK)
    {
      /* When display->mouse_mode is false, we want to ignore
       * EnterNotify events unless they come from mouse motion.  To do
       * that, we set a sentinel property on the root window if we're
       * not in mouse_mode.
       */
      tmp = should_show;
      while (tmp != NULL)
        {
          MetaWindow *window = tmp->data;

          if (!window->display->mouse_mode)
            meta_display_increment_focus_sentinel (window->display);

          tmp = tmp->next;
        }
    }

  meta_display_ungrab (first_window->display);

  g_slist_free (copy);

  g_slist_free (unplaced);
  g_slist_free (should_show);
  g_slist_free (should_hide);
  g_slist_free (displays);

  destroying_windows_disallowed -= 1;

  return FALSE;
}

#ifdef WITH_VERBOSE_MODE
static const gchar* meta_window_queue_names[NUMBER_OF_QUEUES] =
  {"calc_showing", "move_resize", "update_icon"};
#endif

static void
meta_window_unqueue (MetaWindow *window, guint queuebits)
{
  gint queuenum;

  for (queuenum=0; queuenum<NUMBER_OF_QUEUES; queuenum++)
    {
      if ((queuebits & 1<<queuenum) /* they have asked to unqueue */
          &&
          (window->is_in_queues & 1<<queuenum)) /* it's in the queue */
        {

          meta_topic (META_DEBUG_WINDOW_STATE,
              "Removing %s from the %s queue\n",
              window->desc,
              meta_window_queue_names[queuenum]);

          /* Note that window may not actually be in the queue
           * because it may have been in "copy" inside the idle handler
           */
          queue_pending[queuenum] = g_slist_remove (queue_pending[queuenum], window);
          window->is_in_queues &= ~(1<<queuenum);

          /* Okay, so maybe we've used up all the entries in the queue.
           * In that case, we should kill the function that deals with
           * the queue, because there's nothing left for it to do.
           */
          if (queue_pending[queuenum] == NULL && queue_later[queuenum] != 0)
            {
              meta_later_remove (queue_later[queuenum]);
              queue_later[queuenum] = 0;
            }
        }
    }
}

static void
meta_window_flush_calc_showing (MetaWindow *window)
{
  if (window->is_in_queues & META_QUEUE_CALC_SHOWING)
    {
      meta_window_unqueue (window, META_QUEUE_CALC_SHOWING);
      meta_window_calc_showing (window);
    }
}

void
meta_window_queue (MetaWindow *window, guint queuebits)
{
  guint queuenum;

  /* Easier to debug by checking here rather than in the idle */
  g_return_if_fail (!window->override_redirect || (queuebits & META_QUEUE_MOVE_RESIZE) == 0);

  for (queuenum=0; queuenum<NUMBER_OF_QUEUES; queuenum++)
    {
      if (queuebits & 1<<queuenum)
        {
          /* Data which varies between queues.
           * Yes, these do look a lot like associative arrays:
           * I seem to be turning into a Perl programmer.
           */

          const MetaLaterType window_queue_later_when[NUMBER_OF_QUEUES] =
            {
              META_LATER_BEFORE_REDRAW, /* CALC_SHOWING */
              META_LATER_RESIZE,        /* MOVE_RESIZE */
              META_LATER_BEFORE_REDRAW  /* UPDATE_ICON */
            };

          const GSourceFunc window_queue_later_handler[NUMBER_OF_QUEUES] =
            {
              idle_calc_showing,
              idle_move_resize,
              idle_update_icon,
            };

          /* If we're about to drop the window, there's no point in putting
           * it on a queue.
           */
          if (window->unmanaging)
            break;

          /* If the window already claims to be in that queue, there's no
           * point putting it in the queue.
           */
          if (window->is_in_queues & 1<<queuenum)
            break;

          meta_topic (META_DEBUG_WINDOW_STATE,
              "Putting %s in the %s queue\n",
              window->desc,
              meta_window_queue_names[queuenum]);

          /* So, mark it as being in this queue. */
          window->is_in_queues |= 1<<queuenum;

          /* There's not a lot of point putting things into a queue if
           * nobody's on the other end pulling them out. Therefore,
           * let's check to see whether an idle handler exists to do
           * that. If not, we'll create one.
           */

          if (queue_later[queuenum] == 0)
            queue_later[queuenum] = meta_later_add
              (
                window_queue_later_when[queuenum],
                window_queue_later_handler[queuenum],
                GUINT_TO_POINTER(queuenum),
                NULL
              );

          /* And now we actually put it on the queue. */
          queue_pending[queuenum] = g_slist_prepend (queue_pending[queuenum],
                                                     window);
      }
  }
}

static gboolean
intervening_user_event_occurred (MetaWindow *window)
{
  guint32 compare;
  MetaWindow *focus_window;

  focus_window = window->display->focus_window;

  meta_topic (META_DEBUG_STARTUP,
              "COMPARISON:\n"
              "  net_wm_user_time_set : %d\n"
              "  net_wm_user_time     : %u\n"
              "  initial_timestamp_set: %d\n"
              "  initial_timestamp    : %u\n",
              window->net_wm_user_time_set,
              window->net_wm_user_time,
              window->initial_timestamp_set,
              window->initial_timestamp);
  if (focus_window != NULL)
    {
      meta_topic (META_DEBUG_STARTUP,
                  "COMPARISON (continued):\n"
                  "  focus_window             : %s\n"
                  "  fw->net_wm_user_time_set : %d\n"
                  "  fw->net_wm_user_time     : %u\n",
                  focus_window->desc,
                  focus_window->net_wm_user_time_set,
                  focus_window->net_wm_user_time);
    }

  /* We expect the most common case for not focusing a new window
   * to be when a hint to not focus it has been set.  Since we can
   * deal with that case rapidly, we use special case it--this is
   * merely a preliminary optimization.  :)
   */
  if ( ((window->net_wm_user_time_set == TRUE) &&
       (window->net_wm_user_time == 0))
      ||
       ((window->initial_timestamp_set == TRUE) &&
       (window->initial_timestamp == 0)))
    {
      meta_topic (META_DEBUG_STARTUP,
                  "window %s explicitly requested no focus\n",
                  window->desc);
      return TRUE;
    }

  if (!(window->net_wm_user_time_set) && !(window->initial_timestamp_set))
    {
      meta_topic (META_DEBUG_STARTUP,
                  "no information about window %s found\n",
                  window->desc);
      return FALSE;
    }

  if (focus_window != NULL &&
      !focus_window->net_wm_user_time_set)
    {
      meta_topic (META_DEBUG_STARTUP,
                  "focus window, %s, doesn't have a user time set yet!\n",
                  window->desc);
      return FALSE;
    }

  /* To determine the "launch" time of an application,
   * startup-notification can set the TIMESTAMP and the
   * application (usually via its toolkit such as gtk or qt) can
   * set the _NET_WM_USER_TIME.  If both are set, we need to be
   * using the newer of the two values.
   *
   * See http://bugzilla.gnome.org/show_bug.cgi?id=573922
   */
  compare = 0;
  if (window->net_wm_user_time_set &&
      window->initial_timestamp_set)
    compare =
      XSERVER_TIME_IS_BEFORE (window->net_wm_user_time,
                              window->initial_timestamp) ?
      window->initial_timestamp : window->net_wm_user_time;
  else if (window->net_wm_user_time_set)
    compare = window->net_wm_user_time;
  else if (window->initial_timestamp_set)
    compare = window->initial_timestamp;

  if ((focus_window != NULL) &&
      XSERVER_TIME_IS_BEFORE (compare, focus_window->net_wm_user_time))
    {
      meta_topic (META_DEBUG_STARTUP,
                  "window %s focus prevented by other activity; %u < %u\n",
                  window->desc,
                  compare,
                  focus_window->net_wm_user_time);
      return TRUE;
    }
  else
    {
      meta_topic (META_DEBUG_STARTUP,
                  "new window %s with no intervening events\n",
                  window->desc);
      return FALSE;
    }
}

/* This function is an ugly hack.  It's experimental in nature and ought to be
 * replaced by a real hint from the app to the WM if we decide the experimental
 * behavior is worthwhile.  The basic idea is to get more feedback about how
 * usage scenarios of "strict" focus users and what they expect.  See #326159.
 */
gboolean
__window_is_terminal (MetaWindow *window)
{
  if (window == NULL || window->res_class == NULL)
    return FALSE;

  /*
   * Compare res_class, which is not user-settable, and thus theoretically
   * a more-reliable indication of term-ness.
   */

  /* gnome-terminal -- if you couldn't guess */
  if (strcmp (window->res_class, "Gnome-terminal") == 0)
    return TRUE;
  /* xterm, rxvt, aterm */
  else if (strcmp (window->res_class, "XTerm") == 0)
    return TRUE;
  /* konsole, KDE's terminal program */
  else if (strcmp (window->res_class, "Konsole") == 0)
    return TRUE;
  /* rxvt-unicode */
  else if (strcmp (window->res_class, "URxvt") == 0)
    return TRUE;
  /* eterm */
  else if (strcmp (window->res_class, "Eterm") == 0)
    return TRUE;
  /* KTerm -- some terminal not KDE based; so not like Konsole */
  else if (strcmp (window->res_class, "KTerm") == 0)
    return TRUE;
  /* Multi-gnome-terminal */
  else if (strcmp (window->res_class, "Multi-gnome-terminal") == 0)
    return TRUE;
  /* mlterm ("multi lingual terminal emulator on X") */
  else if (strcmp (window->res_class, "mlterm") == 0)
    return TRUE;
  /* Terminal -- XFCE Terminal */
  else if (strcmp (window->res_class, "Terminal") == 0)
    return TRUE;

  return FALSE;
}

/* This function determines what state the window should have assuming that it
 * and the focus_window have no relation
 */
static void
window_state_on_map (MetaWindow *window,
                     gboolean *takes_focus,
                     gboolean *places_on_top)
{
  gboolean intervening_events;

  intervening_events = intervening_user_event_occurred (window);

  *takes_focus = !intervening_events;
  *places_on_top = *takes_focus;

  /* don't initially focus windows that are intended to not accept
   * focus
   */
  if (!(window->input || window->take_focus))
    {
      *takes_focus = FALSE;
      return;
    }

  /* Terminal usage may be different; some users intend to launch
   * many apps in quick succession or to just view things in the new
   * window while still interacting with the terminal.  In that case,
   * apps launched from the terminal should not take focus.  This
   * isn't quite the same as not allowing focus to transfer from
   * terminals due to new window map, but the latter is a much easier
   * approximation to enforce so we do that.
   */
  if (*takes_focus &&
      meta_prefs_get_focus_new_windows () == G_DESKTOP_FOCUS_NEW_WINDOWS_STRICT &&
      !window->display->allow_terminal_deactivation &&
      __window_is_terminal (window->display->focus_window) &&
      !meta_window_is_ancestor_of_transient (window->display->focus_window,
                                             window))
    {
      meta_topic (META_DEBUG_FOCUS,
                  "focus_window is terminal; not focusing new window.\n");
      *takes_focus = FALSE;
      *places_on_top = FALSE;
    }

  switch (window->type)
    {
    case META_WINDOW_UTILITY:
    case META_WINDOW_TOOLBAR:
      *takes_focus = FALSE;
      *places_on_top = FALSE;
      break;
    case META_WINDOW_DOCK:
    case META_WINDOW_DESKTOP:
    case META_WINDOW_SPLASHSCREEN:
    case META_WINDOW_MENU:
    /* override redirect types: */
    case META_WINDOW_DROPDOWN_MENU:
    case META_WINDOW_POPUP_MENU:
    case META_WINDOW_TOOLTIP:
    case META_WINDOW_NOTIFICATION:
    case META_WINDOW_COMBO:
    case META_WINDOW_DND:
    case META_WINDOW_OVERRIDE_OTHER:
      /* don't focus any of these; places_on_top may be irrelevant for some of
       * these (e.g. dock)--but you never know--the focus window might also be
       * of the same type in some weird situation...
       */
      *takes_focus = FALSE;
      break;
    case META_WINDOW_NORMAL:
    case META_WINDOW_DIALOG:
    case META_WINDOW_MODAL_DIALOG:
      /* The default is correct for these */
      break;
    }
}

static gboolean
windows_overlap (const MetaWindow *w1, const MetaWindow *w2)
{
  MetaRectangle w1rect, w2rect;
  meta_window_get_outer_rect (w1, &w1rect);
  meta_window_get_outer_rect (w2, &w2rect);
  return meta_rectangle_overlap (&w1rect, &w2rect);
}

/* Returns whether a new window would be covered by any
 * existing window on the same workspace that is set
 * to be "above" ("always on top").  A window that is not
 * set "above" would be underneath the new window anyway.
 *
 * We take "covered" to mean even partially covered, but
 * some people might prefer entirely covered.  I think it
 * is more useful to behave this way if any part of the
 * window is covered, because a partial coverage could be
 * (say) ninety per cent and almost indistinguishable from total.
 */
static gboolean
window_would_be_covered (const MetaWindow *newbie)
{
  MetaWorkspace *workspace = newbie->workspace;
  GList *tmp, *windows;

  windows = meta_workspace_list_windows (workspace);

  tmp = windows;
  while (tmp != NULL)
    {
      MetaWindow *w = tmp->data;

      if (w->wm_state_above && w != newbie)
        {
          /* We have found a window that is "above". Perhaps it overlaps. */
          if (windows_overlap (w, newbie))
            {
              g_list_free (windows); /* clean up... */
              return TRUE; /* yes, it does */
            }
        }

      tmp = tmp->next;
    }

  g_list_free (windows);
  return FALSE; /* none found */
}

static gboolean
map_frame (MetaWindow *window)
{
  if (window->frame && !window->frame->mapped)
    {
      meta_topic (META_DEBUG_WINDOW_STATE,
                  "Frame actually needs map\n");
      window->frame->mapped = TRUE;
      meta_ui_map_frame (window->screen->ui, window->frame->xwindow);
      return TRUE;
    }
  else
    return FALSE;
}

static gboolean
map_client_window (MetaWindow *window)
{
  if (!window->mapped)
    {
      meta_topic (META_DEBUG_WINDOW_STATE,
                  "%s actually needs map\n", window->desc);
      window->mapped = TRUE;
      meta_error_trap_push (window->display);
      XMapWindow (window->display->xdisplay, window->xwindow);
      meta_error_trap_pop (window->display);

      return TRUE;
    }
  else
    return FALSE;
}

static gboolean
unmap_client_window (MetaWindow *window,
                     const char *reason)
{
  if (window->mapped)
    {
      meta_topic (META_DEBUG_WINDOW_STATE,
                  "%s actually needs unmap%s\n",
                  window->desc, reason);
      meta_topic (META_DEBUG_WINDOW_STATE,
                  "Incrementing unmaps_pending on %s%s\n",
                  window->desc, reason);
      window->mapped = FALSE;
      window->unmaps_pending += 1;
      meta_error_trap_push (window->display);
      XUnmapWindow (window->display->xdisplay, window->xwindow);
      meta_error_trap_pop (window->display);

      return TRUE;
    }
  else
    return FALSE;
}

/**
 * meta_window_is_mapped:
 * @window: a #MetaWindow
 *
 * Determines whether the X window for the MetaWindow is mapped.
 */
gboolean
meta_window_is_mapped (MetaWindow  *window)
{
  return window->mapped;
}

/**
 * meta_window_toplevel_is_mapped:
 * @window: a #MetaWindow
 *
 * Determines whether the toplevel X window for the MetaWindow is
 * mapped. (The frame window is mapped even without the client window
 * when a window is shaded.)
 *
 * Return Value: %TRUE if the toplevel is mapped.
 */
gboolean
meta_window_toplevel_is_mapped (MetaWindow *window)
{
  /* The frame is mapped but not the client window when the window
   * is shaded.
   */
  return window->mapped || (window->frame && window->frame->mapped);
}

static void
meta_window_force_placement (MetaWindow *window)
{
  if (window->placed)
    return;

  /* We have to recalc the placement here since other windows may
   * have been mapped/placed since we last did constrain_position
   */

  /* calc_placement is an efficiency hack to avoid
   * multiple placement calculations before we finally
   * show the window.
   */
  window->calc_placement = TRUE;
  meta_window_move_resize_now (window);
  window->calc_placement = FALSE;

  /* don't ever do the initial position constraint thing again.
   * This is toggled here so that initially-iconified windows
   * still get placed when they are ultimately shown.
   */
  window->placed = TRUE;

  /* Don't want to accidentally reuse the fact that we had been denied
   * focus in any future constraints unless we're denied focus again.
   */
  window->denied_focus_and_not_transient = FALSE;
}

static void
meta_window_show (MetaWindow *window)
{
  gboolean did_show;
  gboolean takes_focus_on_map;
  gboolean place_on_top_on_map;
  gboolean needs_stacking_adjustment;
  MetaWindow *focus_window;
  gboolean toplevel_was_mapped;
  gboolean toplevel_now_mapped;
  gboolean notify_demands_attention = FALSE;

  meta_topic (META_DEBUG_WINDOW_STATE,
              "Showing window %s, shaded: %d iconic: %d placed: %d\n",
              window->desc, window->shaded, window->iconic, window->placed);

  toplevel_was_mapped = meta_window_toplevel_is_mapped (window);

  focus_window = window->display->focus_window;  /* May be NULL! */
  did_show = FALSE;
  window_state_on_map (window, &takes_focus_on_map, &place_on_top_on_map);
  needs_stacking_adjustment = FALSE;

  meta_topic (META_DEBUG_WINDOW_STATE,
              "Window %s %s focus on map, and %s place on top on map.\n",
              window->desc,
              takes_focus_on_map ? "does" : "does not",
              place_on_top_on_map ? "does" : "does not");

  /* Now, in some rare cases we should *not* put a new window on top.
   * These cases include certain types of windows showing for the first
   * time, and any window which would be covered because of another window
   * being set "above" ("always on top").
   *
   * FIXME: Although "place_on_top_on_map" and "takes_focus_on_map" are
   * generally based on the window type, there is a special case when the
   * focus window is a terminal for them both to be false; this should
   * probably rather be a term in the "if" condition below.
   */

  if ( focus_window != NULL && window->showing_for_first_time &&
      ( (!place_on_top_on_map && !takes_focus_on_map) ||
      window_would_be_covered (window) )
    ) {
      if (meta_window_is_ancestor_of_transient (focus_window, window))
        {
          guint32     timestamp;

          timestamp = meta_display_get_current_time_roundtrip (window->display);

          /* This happens for error dialogs or alerts; these need to remain on
           * top, but it would be confusing to have its ancestor remain
           * focused.
           */
          meta_topic (META_DEBUG_STARTUP,
                      "The focus window %s is an ancestor of the newly mapped "
                      "window %s which isn't being focused.  Unfocusing the "
                      "ancestor.\n",
                      focus_window->desc, window->desc);

          meta_display_focus_the_no_focus_window (window->display,
                                                  window->screen,
                                                  timestamp);
        }
      else
        {
          needs_stacking_adjustment = TRUE;
          if (!window->placed)
            window->denied_focus_and_not_transient = TRUE;
        }
    }

  if (!window->placed)
    {
      if (window->showing_for_first_time && window->has_maximize_func)
        {
          MetaRectangle work_area;
          meta_window_get_work_area_for_monitor (window, window->monitor->number, &work_area);
          /* Automaximize windows that map with a size > MAX_UNMAXIMIZED_WINDOW_AREA of the work area */
          if (window->rect.width * window->rect.height > work_area.width * work_area.height * MAX_UNMAXIMIZED_WINDOW_AREA)
            {
              window->maximize_horizontally_after_placement = TRUE;
              window->maximize_vertically_after_placement = TRUE;
            }
        }
      meta_window_force_placement (window);
    }

  if (needs_stacking_adjustment)
    {
      gboolean overlap;

      /* This window isn't getting focus on map.  We may need to do some
       * special handing with it in regards to
       *   - the stacking of the window
       *   - the MRU position of the window
       *   - the demands attention setting of the window
       *
       * Firstly, set the flag so we don't give the window focus anyway
       * and confuse people.
       */

      takes_focus_on_map = FALSE;

      overlap = windows_overlap (window, focus_window);

      /* We want alt tab to go to the denied-focus window */
      ensure_mru_position_after (window, focus_window);

      /* We don't want the denied-focus window to obscure the focus
       * window, and if we're in both click-to-focus mode and
       * raise-on-click mode then we want to maintain the invariant
       * that MRU order == stacking order.  The need for this if
       * comes from the fact that in sloppy/mouse focus the focus
       * window may not overlap other windows and also can be
       * considered "below" them; this combination means that
       * placing the denied-focus window "below" the focus window
       * in the stack when it doesn't overlap it confusingly places
       * that new window below a lot of other windows.
       */
      if (overlap ||
          (meta_prefs_get_focus_mode () == G_DESKTOP_FOCUS_MODE_CLICK &&
           meta_prefs_get_raise_on_click ()))
        meta_window_stack_just_below (window, focus_window);

      /* If the window will be obscured by the focus window, then the
       * user might not notice the window appearing so set the
       * demands attention hint.
       *
       * We set the hint ourselves rather than calling
       * meta_window_set_demands_attention() because that would cause
       * a recalculation of overlap, and a call to set_net_wm_state()
       * which we are going to call ourselves here a few lines down.
       */
      if (overlap)
        {
          if (!window->wm_state_demands_attention)
            {
              window->wm_state_demands_attention = TRUE;
              notify_demands_attention = TRUE;
            }
        }
    }

  /* Shaded means the frame is mapped but the window is not */

  if (map_frame (window))
    did_show = TRUE;

  if (window->shaded)
    {
      unmap_client_window (window, " (shading)");

      if (!window->iconic)
        {
          window->iconic = TRUE;
          set_wm_state (window, IconicState);
        }
    }
  else
    {
      if (map_client_window (window))
        did_show = TRUE;

      if (window->hidden)
        {
          meta_stack_freeze (window->screen->stack);
          window->hidden = FALSE;
          meta_stack_thaw (window->screen->stack);
          did_show = TRUE;
        }

      if (window->iconic)
        {
          window->iconic = FALSE;
          set_wm_state (window, NormalState);
        }
    }

  toplevel_now_mapped = meta_window_toplevel_is_mapped (window);
  if (toplevel_now_mapped != toplevel_was_mapped)
    {
      if (window->display->compositor)
        meta_compositor_window_mapped (window->display->compositor, window);
    }

  if (!window->visible_to_compositor)
    {
      window->visible_to_compositor = TRUE;

      if (window->display->compositor)
        {
          MetaCompEffect effect = META_COMP_EFFECT_NONE;

          switch (window->pending_compositor_effect)
            {
            case META_COMP_EFFECT_CREATE:
            case META_COMP_EFFECT_UNMINIMIZE:
              effect = window->pending_compositor_effect;
              break;
            case META_COMP_EFFECT_NONE:
            case META_COMP_EFFECT_DESTROY:
            case META_COMP_EFFECT_MINIMIZE:
              break;
            }

          meta_compositor_show_window (window->display->compositor,
                                       window, effect);
        }
    }

  /* We don't want to worry about all cases from inside
   * implement_showing(); we only want to worry about focus if this
   * window has not been shown before.
   */
  if (window->showing_for_first_time)
    {
      window->showing_for_first_time = FALSE;
      if (takes_focus_on_map)
        {
          guint32     timestamp;

          timestamp = meta_display_get_current_time_roundtrip (window->display);

          meta_window_focus (window, timestamp);
        }
      else
        {
          /* Prevent EnterNotify events in sloppy/mouse focus from
           * erroneously focusing the window that had been denied
           * focus.  FIXME: This introduces a race; I have a couple
           * ideas for a better way to accomplish the same thing, but
           * they're more involved so do it this way for now.
           */
          meta_display_increment_focus_sentinel (window->display);
        }
    }

  set_net_wm_state (window);

  if (did_show && window->struts)
    {
      meta_topic (META_DEBUG_WORKAREA,
                  "Mapped window %s with struts, so invalidating work areas\n",
                  window->desc);
      invalidate_work_areas (window);
    }

  /*
   * Now that we have shown the window, we no longer want to consider the
   * initial timestamp in any subsequent deliberations whether to focus this
   * window or not, so clear the flag.
   *
   * See http://bugzilla.gnome.org/show_bug.cgi?id=573922
   */
  window->initial_timestamp_set = FALSE;

  if (notify_demands_attention)
    {
      g_object_notify (G_OBJECT (window), "demands-attention");
      g_signal_emit_by_name (window->display, "window-demands-attention",
                             window);
    }
}

static void
meta_window_hide (MetaWindow *window)
{
  gboolean did_hide;
  gboolean toplevel_was_mapped;
  gboolean toplevel_now_mapped;

  meta_topic (META_DEBUG_WINDOW_STATE,
              "Hiding window %s\n", window->desc);

  toplevel_was_mapped = meta_window_toplevel_is_mapped (window);

  if (window->visible_to_compositor)
    {
      window->visible_to_compositor = FALSE;

      if (window->display->compositor)
        {
          MetaCompEffect effect = META_COMP_EFFECT_NONE;

          switch (window->pending_compositor_effect)
            {
            case META_COMP_EFFECT_CREATE:
            case META_COMP_EFFECT_UNMINIMIZE:
            case META_COMP_EFFECT_NONE:
              break;
            case META_COMP_EFFECT_DESTROY:
            case META_COMP_EFFECT_MINIMIZE:
              effect = window->pending_compositor_effect;
              break;
            }

          meta_compositor_hide_window (window->display->compositor,
                                       window, effect);
        }
    }

  did_hide = FALSE;

  /* If this is the first time that we've calculating the showing
   * state of the window, the frame and client window might not
   * yet be mapped, so we need to map them now */
  map_frame (window);
  map_client_window (window);

  if (!window->hidden)
    {
      meta_stack_freeze (window->screen->stack);
      window->hidden = TRUE;
      meta_stack_thaw (window->screen->stack);

      did_hide = TRUE;
    }

  if (!window->iconic)
    {
      window->iconic = TRUE;
      set_wm_state (window, IconicState);
    }

  toplevel_now_mapped = meta_window_toplevel_is_mapped (window);
  if (toplevel_now_mapped != toplevel_was_mapped)
    {
      if (window->display->compositor)
        {
          /* As above, we may be *mapping* live hidden windows */
          if (toplevel_now_mapped)
            meta_compositor_window_mapped (window->display->compositor, window);
          else
            meta_compositor_window_unmapped (window->display->compositor, window);
        }
    }

  set_net_wm_state (window);

  if (did_hide && window->struts)
    {
      meta_topic (META_DEBUG_WORKAREA,
                  "Unmapped window %s with struts, so invalidating work areas\n",
                  window->desc);
      invalidate_work_areas (window);
    }

  /* The check on expected_focus_window is a temporary workaround for
   *  https://bugzilla.gnome.org/show_bug.cgi?id=597352
   * We may have already switched away from this window but not yet
   * gotten FocusIn/FocusOut events. A more complete comprehensive
   * fix for these type of issues is described in the bug.
   */
  if (window->has_focus &&
      window == window->display->expected_focus_window)
    {
      MetaWindow *not_this_one = NULL;
      MetaWorkspace *my_workspace = meta_window_get_workspace (window);
      guint32 timestamp = meta_display_get_current_time_roundtrip (window->display);

      /*
       * If this window is modal, passing the not_this_one window to
       * _focus_default_window() makes the focus to be given to this window's
       * ancestor. This can only be the case if the window is on the currently
       * active workspace; when it is not, we need to pass in NULL, so as to
       * focus the default window for the active workspace (this scenario
       * arises when we are switching workspaces).
       * We also pass in NULL if we are in the process of hiding all non-desktop
       * windows to avoid unexpected changes to the stacking order.
       */
      if (my_workspace == window->screen->active_workspace &&
          !my_workspace->showing_desktop)
        not_this_one = window;

      meta_workspace_focus_default_window (window->screen->active_workspace,
                                           not_this_one,
                                           timestamp);
    }
}

static gboolean
queue_calc_showing_func (MetaWindow *window,
                         void       *data)
{
  meta_window_queue(window, META_QUEUE_CALC_SHOWING);
  return TRUE;
}

void
meta_window_minimize (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  if (!window->minimized)
    {
      window->minimized = TRUE;
      window->pending_compositor_effect = META_COMP_EFFECT_MINIMIZE;
      meta_window_queue(window, META_QUEUE_CALC_SHOWING);

      meta_window_foreach_transient (window,
                                     queue_calc_showing_func,
                                     NULL);

      if (window->has_focus)
        {
          meta_topic (META_DEBUG_FOCUS,
                      "Focusing default window due to minimization of focus window %s\n",
                      window->desc);
        }
      else
        {
          meta_topic (META_DEBUG_FOCUS,
                      "Minimizing window %s which doesn't have the focus\n",
                      window->desc);
        }
      g_object_notify (G_OBJECT (window), "minimized");
    }
}

void
meta_window_unminimize (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  if (window->minimized)
    {
      window->minimized = FALSE;
      window->pending_compositor_effect = META_COMP_EFFECT_UNMINIMIZE;
      meta_window_queue(window, META_QUEUE_CALC_SHOWING);

      meta_window_foreach_transient (window,
                                     queue_calc_showing_func,
                                     NULL);
      g_object_notify (G_OBJECT (window), "minimized");
    }
}

static void
ensure_size_hints_satisfied (MetaRectangle    *rect,
                             const XSizeHints *size_hints)
{
  int minw, minh, maxw, maxh;   /* min/max width/height                      */
  int basew, baseh, winc, hinc; /* base width/height, width/height increment */
  int extra_width, extra_height;

  minw  = size_hints->min_width;  minh  = size_hints->min_height;
  maxw  = size_hints->max_width;  maxh  = size_hints->max_height;
  basew = size_hints->base_width; baseh = size_hints->base_height;
  winc  = size_hints->width_inc;  hinc  = size_hints->height_inc;

  /* First, enforce min/max size constraints */
  rect->width  = CLAMP (rect->width,  minw, maxw);
  rect->height = CLAMP (rect->height, minh, maxh);

  /* Now, verify size increment constraints are satisfied, or make them be */
  extra_width  = (rect->width  - basew) % winc;
  extra_height = (rect->height - baseh) % hinc;

  rect->width  -= extra_width;
  rect->height -= extra_height;

  /* Adjusting width/height down, as done above, may violate minimum size
   * constraints, so one last fix.
   */
  if (rect->width  < minw)
    rect->width  += ((minw - rect->width)/winc  + 1)*winc;
  if (rect->height < minh)
    rect->height += ((minh - rect->height)/hinc + 1)*hinc;
}

static void
meta_window_save_rect (MetaWindow *window)
{
  if (!(META_WINDOW_MAXIMIZED (window) || META_WINDOW_TILED_SIDE_BY_SIDE (window) || window->fullscreen))
    {
      /* save size/pos as appropriate args for move_resize */
      if (!window->maximized_horizontally)
        {
          window->saved_rect.x      = window->rect.x;
          window->saved_rect.width  = window->rect.width;
          if (window->frame)
            window->saved_rect.x   += window->frame->rect.x;
        }
      if (!window->maximized_vertically)
        {
          window->saved_rect.y      = window->rect.y;
          window->saved_rect.height = window->rect.height;
          if (window->frame)
            window->saved_rect.y   += window->frame->rect.y;
        }
    }
}

/**
 * force_save_user_window_placement:
 * @window: Store current position of this window for future reference
 *
 * Save the user_rect regardless of whether the window is maximized or
 * fullscreen. See save_user_window_placement() for most uses.
 */
static void
force_save_user_window_placement (MetaWindow *window)
{
  meta_window_get_client_root_coords (window, &window->user_rect);
}

/**
 * save_user_window_placement:
 * @window: Store current position of this window for future reference
 *
 * Save the user_rect, but only if the window is neither maximized nor
 * fullscreen, otherwise the window may snap back to those dimensions
 * (bug #461927).
 */
static void
save_user_window_placement (MetaWindow *window)
{
  if (!(META_WINDOW_MAXIMIZED (window) || META_WINDOW_TILED_SIDE_BY_SIDE (window) || window->fullscreen))
    {
      MetaRectangle user_rect;

      meta_window_get_client_root_coords (window, &user_rect);

      if (!window->maximized_horizontally)
	{
	  window->user_rect.x     = user_rect.x;
	  window->user_rect.width = user_rect.width;
	}
      if (!window->maximized_vertically)
	{
	  window->user_rect.y      = user_rect.y;
	  window->user_rect.height = user_rect.height;
	}
    }
}

void
meta_window_maximize_internal (MetaWindow        *window,
                               MetaMaximizeFlags  directions,
                               MetaRectangle     *saved_rect)
{
  /* At least one of the two directions ought to be set */
  gboolean maximize_horizontally, maximize_vertically;
  maximize_horizontally = directions & META_MAXIMIZE_HORIZONTAL;
  maximize_vertically   = directions & META_MAXIMIZE_VERTICAL;
  g_assert (maximize_horizontally || maximize_vertically);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Maximizing %s%s\n",
              window->desc,
              maximize_horizontally && maximize_vertically ? "" :
                maximize_horizontally ? " horizontally" :
                  maximize_vertically ? " vertically" : "BUGGGGG");

  if (saved_rect != NULL)
    window->saved_rect = *saved_rect;
  else
    meta_window_save_rect (window);

  if (maximize_horizontally && maximize_vertically)
    window->saved_maximize = TRUE;

  window->maximized_horizontally =
    window->maximized_horizontally || maximize_horizontally;
  window->maximized_vertically =
    window->maximized_vertically   || maximize_vertically;
  if (maximize_horizontally || maximize_vertically)
    window->force_save_user_rect = FALSE;

  recalc_window_features (window);
  set_net_wm_state (window);

  g_object_freeze_notify (G_OBJECT (window));
  g_object_notify (G_OBJECT (window), "maximized-horizontally");
  g_object_notify (G_OBJECT (window), "maximized-vertically");
  g_object_thaw_notify (G_OBJECT (window));
}

void
meta_window_maximize (MetaWindow        *window,
                      MetaMaximizeFlags  directions)
{
  MetaRectangle *saved_rect = NULL;
  gboolean maximize_horizontally, maximize_vertically;

  g_return_if_fail (!window->override_redirect);

  /* At least one of the two directions ought to be set */
  maximize_horizontally = directions & META_MAXIMIZE_HORIZONTAL;
  maximize_vertically   = directions & META_MAXIMIZE_VERTICAL;
  g_assert (maximize_horizontally || maximize_vertically);

  /* Only do something if the window isn't already maximized in the
   * given direction(s).
   */
  if ((maximize_horizontally && !window->maximized_horizontally) ||
      (maximize_vertically   && !window->maximized_vertically))
    {
      if (window->shaded && maximize_vertically)
        {
          /* Shading sucks anyway; I'm not adding a timestamp argument
           * to this function just for this niche usage & corner case.
           */
          guint32 timestamp =
            meta_display_get_current_time_roundtrip (window->display);
          meta_window_unshade (window, timestamp);
        }

      /* if the window hasn't been placed yet, we'll maximize it then
       */
      if (!window->placed)
	{
	  window->maximize_horizontally_after_placement =
            window->maximize_horizontally_after_placement ||
            maximize_horizontally;
	  window->maximize_vertically_after_placement =
            window->maximize_vertically_after_placement ||
            maximize_vertically;
	  return;
	}

      if (window->tile_mode != META_TILE_NONE)
        {
          saved_rect = &window->saved_rect;

          window->maximized_vertically = FALSE;
        }

      meta_window_maximize_internal (window,
                                     directions,
                                     saved_rect);

      if (window->display->compositor)
        {
          MetaRectangle old_rect;
	  MetaRectangle new_rect;

	  meta_window_get_outer_rect (window, &old_rect);

          meta_window_move_resize_now (window);

	  meta_window_get_outer_rect (window, &new_rect);
          meta_compositor_maximize_window (window->display->compositor,
                                           window,
                                           &old_rect,
					   &new_rect);
        }
      else
        {
          /* move_resize with new maximization constraints
           */
          meta_window_queue(window, META_QUEUE_MOVE_RESIZE);
        }
    }
}

/**
 * meta_window_get_maximized:
 *
 * Gets the current maximization state of the window, as combination
 * of the %META_MAXIMIZE_HORIZONTAL and %META_MAXIMIZE_VERTICAL flags;
 *
 * Return value: current maximization state
 */
MetaMaximizeFlags
meta_window_get_maximized (MetaWindow *window)
{
  return ((window->maximized_horizontally ? META_MAXIMIZE_HORIZONTAL : 0) |
          (window->maximized_vertically ? META_MAXIMIZE_VERTICAL : 0));
}

/**
 * meta_window_is_fullscreen:
 *
 * Return value: %TRUE if the window is currently fullscreen
 */
gboolean
meta_window_is_fullscreen (MetaWindow *window)
{
  return window->fullscreen;
}

/**
 * meta_window_is_on_primary_monitor:
 *
 * Return value: %TRUE if the window is on the primary monitor
 */
gboolean
meta_window_is_on_primary_monitor (MetaWindow *window)
{
  return window->monitor->is_primary;
}

void
meta_window_tile (MetaWindow *window)
{
  MetaMaximizeFlags directions;

  /* Don't do anything if no tiling is requested */
  if (window->tile_mode == META_TILE_NONE)
    return;

  if (window->tile_mode == META_TILE_MAXIMIZED)
    directions = META_MAXIMIZE_VERTICAL | META_MAXIMIZE_HORIZONTAL;
  else
    directions = META_MAXIMIZE_VERTICAL;

  meta_window_maximize_internal (window, directions, NULL);
  meta_screen_tile_preview_update (window->screen, FALSE);

  if (window->display->compositor)
    {
      MetaRectangle old_rect;
      MetaRectangle new_rect;

      meta_window_get_outer_rect (window, &old_rect);

      meta_window_move_resize_now (window);

      meta_window_get_outer_rect (window, &new_rect);
      meta_compositor_maximize_window (window->display->compositor,
                                       window,
                                       &old_rect,
                                       &new_rect);

      if (window->frame)
        meta_ui_queue_frame_draw (window->screen->ui,
                                  window->frame->xwindow);
    }
  else
    {
      /* move_resize with new tiling constraints
       */
      meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
    }
}

static gboolean
meta_window_can_tile_maximized (MetaWindow *window)
{
  return window->has_maximize_func;
}

gboolean
meta_window_can_tile_side_by_side (MetaWindow *window)
{
  int monitor;
  MetaRectangle tile_area;
  MetaFrameBorders borders;

  if (!meta_window_can_tile_maximized (window))
    return FALSE;

  monitor = meta_screen_get_current_monitor (window->screen);
  meta_window_get_work_area_for_monitor (window, monitor, &tile_area);

  /* Do not allow tiling in portrait orientation */
  if (tile_area.height > tile_area.width)
    return FALSE;

  tile_area.width /= 2;

  meta_frame_calc_borders (window->frame, &borders);

  tile_area.width  -= (borders.visible.left + borders.visible.right);
  tile_area.height -= (borders.visible.top + borders.visible.bottom);

  return tile_area.width >= window->size_hints.min_width &&
         tile_area.height >= window->size_hints.min_height;
}

static void
unmaximize_window_before_freeing (MetaWindow        *window)
{
  meta_topic (META_DEBUG_WINDOW_OPS,
              "Unmaximizing %s just before freeing\n",
              window->desc);

  window->maximized_horizontally = FALSE;
  window->maximized_vertically = FALSE;

  if (window->withdrawn)                /* See bug #137185 */
    {
      window->rect = window->saved_rect;
      set_net_wm_state (window);
    }
  else if (window->screen->closing)     /* See bug #358042 */
    {
      /* Do NOT update net_wm_state: this screen is closing,
       * it likely will be managed by another window manager
       * that will need the current _NET_WM_STATE atoms.
       * Moreover, it will need to know the unmaximized geometry,
       * therefore move_resize the window to saved_rect here
       * before closing it. */
      meta_window_move_resize (window,
                               FALSE,
                               window->saved_rect.x,
                               window->saved_rect.y,
                               window->saved_rect.width,
                               window->saved_rect.height);
    }
}

static void
meta_window_unmaximize_internal (MetaWindow        *window,
                                 MetaMaximizeFlags  directions,
                                 MetaRectangle     *desired_rect,
                                 int                gravity)
{
  gboolean unmaximize_horizontally, unmaximize_vertically;

  g_return_if_fail (!window->override_redirect);

  /* At least one of the two directions ought to be set */
  unmaximize_horizontally = directions & META_MAXIMIZE_HORIZONTAL;
  unmaximize_vertically   = directions & META_MAXIMIZE_VERTICAL;
  g_assert (unmaximize_horizontally || unmaximize_vertically);

  if (unmaximize_horizontally && unmaximize_vertically)
    window->saved_maximize = FALSE;

  /* Only do something if the window isn't already maximized in the
   * given direction(s).
   */
  if ((unmaximize_horizontally && window->maximized_horizontally) ||
      (unmaximize_vertically   && window->maximized_vertically))
    {
      MetaRectangle target_rect;
      MetaRectangle work_area;

      meta_window_get_work_area_for_monitor (window, window->monitor->number, &work_area);

      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Unmaximizing %s%s\n",
                  window->desc,
                  unmaximize_horizontally && unmaximize_vertically ? "" :
                    unmaximize_horizontally ? " horizontally" :
                      unmaximize_vertically ? " vertically" : "BUGGGGG");

      window->maximized_horizontally =
        window->maximized_horizontally && !unmaximize_horizontally;
      window->maximized_vertically =
        window->maximized_vertically   && !unmaximize_vertically;

      /* Reset the tile mode for maximized tiled windows for consistency
       * with "normal" maximized windows, but keep other tile modes,
       * as side-by-side tiled windows may snap back.
       */
      if (window->tile_mode == META_TILE_MAXIMIZED)
        window->tile_mode = META_TILE_NONE;

      /* Unmaximize to the saved_rect position in the direction(s)
       * being unmaximized.
       */
      meta_window_get_client_root_coords (window, &target_rect);

      /* Avoid unmaximizing to "almost maximized" size when the previous size
       * is greater then 80% of the work area use MAX_UNMAXIMIZED_WINDOW_AREA of the work area as upper limit
       * while maintaining the aspect ratio.
       */
      if (unmaximize_horizontally && unmaximize_vertically &&
          desired_rect->width * desired_rect->height > work_area.width * work_area.height * MAX_UNMAXIMIZED_WINDOW_AREA)
        {
          if (desired_rect->width > desired_rect->height)
            {
              float aspect = (float)desired_rect->height / (float)desired_rect->width;
              desired_rect->width = MAX (work_area.width * sqrt (MAX_UNMAXIMIZED_WINDOW_AREA), window->size_hints.min_width);
              desired_rect->height = MAX (desired_rect->width * aspect, window->size_hints.min_height);
            }
          else
            {
              float aspect = (float)desired_rect->width / (float)desired_rect->height;
              desired_rect->height = MAX (work_area.height * sqrt (MAX_UNMAXIMIZED_WINDOW_AREA), window->size_hints.min_height);
              desired_rect->width = MAX (desired_rect->height * aspect, window->size_hints.min_width);
            }
        }

      if (unmaximize_horizontally)
        {
          target_rect.x     = desired_rect->x;
          target_rect.width = desired_rect->width;
        }
      if (unmaximize_vertically)
        {
          target_rect.y      = desired_rect->y;
          target_rect.height = desired_rect->height;
        }

      /* Window's size hints may have changed while maximized, making
       * saved_rect invalid.  #329152
       */
      ensure_size_hints_satisfied (&target_rect, &window->size_hints);

      if (window->display->compositor)
        {
          MetaRectangle old_rect, new_rect;

	  meta_window_get_outer_rect (window, &old_rect);

          meta_window_move_resize_internal (window,
                                            META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION,
                                            gravity,
                                            target_rect.x,
                                            target_rect.y,
                                            target_rect.width,
                                            target_rect.height);

	  meta_window_get_outer_rect (window, &new_rect);
          meta_compositor_unmaximize_window (window->display->compositor,
					     window,
                                             &old_rect,
					     &new_rect);
        }
      else
        {
          meta_window_move_resize_internal (window,
                                            META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION,
                                            gravity,
                                            target_rect.x,
                                            target_rect.y,
                                            target_rect.width,
                                            target_rect.height);
        }

      /* Make sure user_rect is current.
       */
      force_save_user_window_placement (window);

      /* When we unmaximize, if we're doing a mouse move also we could
       * get the window suddenly jumping to the upper left corner of
       * the workspace, since that's where it was when the grab op
       * started.  So we need to update the grab state. We have to do
       * it after the actual operation, as the window may have been moved
       * by constraints.
       */
      if (meta_grab_op_is_moving (window->display->grab_op) &&
          window->display->grab_window == window)
        {
          window->display->grab_anchor_window_pos = window->user_rect;
        }

      recalc_window_features (window);
      set_net_wm_state (window);
    }

    g_object_freeze_notify (G_OBJECT (window));
    g_object_notify (G_OBJECT (window), "maximized-horizontally");
    g_object_notify (G_OBJECT (window), "maximized-vertically");
    g_object_thaw_notify (G_OBJECT (window));
}

void
meta_window_unmaximize (MetaWindow        *window,
                        MetaMaximizeFlags  directions)
{
  meta_window_unmaximize_internal (window, directions, &window->saved_rect,
                                   NorthWestGravity);
}

/* Like meta_window_unmaximize(), but instead of unmaximizing to the
 * saved position, we give the new desired size, and the gravity that
 * determines the positioning relationship between the area occupied
 * maximized and the new are. The arguments are similar to
 * meta_window_resize_with_gravity().
 * Unlike meta_window_unmaximize(), tiling is not restored for windows
 * with a tile mode other than META_TILE_NONE.
 */
void
meta_window_unmaximize_with_gravity (MetaWindow        *window,
                                     MetaMaximizeFlags  directions,
                                     int                new_width,
                                     int                new_height,
                                     int                gravity)
{
  MetaRectangle desired_rect;

  meta_window_get_position (window, &desired_rect.x, &desired_rect.y);
  desired_rect.width = new_width;
  desired_rect.height = new_height;

  meta_window_unmaximize_internal (window, directions, &desired_rect, gravity);
}

void
meta_window_make_above (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  meta_window_set_above (window, TRUE);
  meta_window_raise (window);
}

void
meta_window_unmake_above (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  meta_window_set_above (window, FALSE);
  meta_window_raise (window);
}

static void
meta_window_set_above (MetaWindow *window,
                       gboolean    new_value)
{
  new_value = new_value != FALSE;
  if (new_value == window->wm_state_above)
    return;

  window->wm_state_above = new_value;
  meta_window_update_layer (window);
  set_net_wm_state (window);
  g_object_notify (G_OBJECT (window), "above");
}

void
meta_window_make_fullscreen_internal (MetaWindow  *window)
{
  if (!window->fullscreen)
    {
      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Fullscreening %s\n", window->desc);

      if (window->shaded)
        {
          /* Shading sucks anyway; I'm not adding a timestamp argument
           * to this function just for this niche usage & corner case.
           */
          guint32 timestamp =
            meta_display_get_current_time_roundtrip (window->display);
          meta_window_unshade (window, timestamp);
        }

      meta_window_save_rect (window);

      window->fullscreen = TRUE;
      window->force_save_user_rect = FALSE;

      meta_stack_freeze (window->screen->stack);
      meta_window_update_layer (window);

      meta_window_raise (window);
      meta_stack_thaw (window->screen->stack);

      recalc_window_features (window);
      set_net_wm_state (window);

      g_object_notify (G_OBJECT (window), "fullscreen");
    }
}

void
meta_window_make_fullscreen (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  if (!window->fullscreen)
    {
      meta_window_make_fullscreen_internal (window);
      /* move_resize with new constraints
       */
      meta_window_queue(window, META_QUEUE_MOVE_RESIZE);
    }
}

void
meta_window_unmake_fullscreen (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  if (window->fullscreen)
    {
      MetaRectangle target_rect;

      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Unfullscreening %s\n", window->desc);

      window->fullscreen = FALSE;
      target_rect = window->saved_rect;

      /* Window's size hints may have changed while maximized, making
       * saved_rect invalid.  #329152
       */
      ensure_size_hints_satisfied (&target_rect, &window->size_hints);

      /* Need to update window->has_resize_func before we move_resize()
       */
      recalc_window_features (window);
      set_net_wm_state (window);

      meta_window_move_resize (window,
                               FALSE,
                               target_rect.x,
                               target_rect.y,
                               target_rect.width,
                               target_rect.height);

      /* Make sure user_rect is current.
       */
      force_save_user_window_placement (window);

      meta_window_update_layer (window);

      g_object_notify (G_OBJECT (window), "fullscreen");
    }
}

void
meta_window_update_fullscreen_monitors (MetaWindow    *window,
                                        unsigned long  top,
                                        unsigned long  bottom,
                                        unsigned long  left,
                                        unsigned long  right)
{
  if ((int)top < window->screen->n_monitor_infos &&
      (int)bottom < window->screen->n_monitor_infos &&
      (int)left < window->screen->n_monitor_infos &&
      (int)right < window->screen->n_monitor_infos)
    {
      window->fullscreen_monitors[0] = top;
      window->fullscreen_monitors[1] = bottom;
      window->fullscreen_monitors[2] = left;
      window->fullscreen_monitors[3] = right;
    }
  else
    {
      window->fullscreen_monitors[0] = -1;
    }

  if (window->fullscreen)
    {
      meta_window_queue(window, META_QUEUE_MOVE_RESIZE);
    }
}

void
meta_window_shade (MetaWindow  *window,
                   guint32      timestamp)
{
  g_return_if_fail (!window->override_redirect);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Shading %s\n", window->desc);
  if (!window->shaded)
    {
      window->shaded = TRUE;

      meta_window_queue(window, META_QUEUE_MOVE_RESIZE | META_QUEUE_CALC_SHOWING);

      /* After queuing the calc showing, since _focus flushes it,
       * and we need to focus the frame
       */
      meta_topic (META_DEBUG_FOCUS,
                  "Re-focusing window %s after shading it\n",
                  window->desc);
      meta_window_focus (window, timestamp);

      set_net_wm_state (window);
    }
}

void
meta_window_unshade (MetaWindow  *window,
                     guint32      timestamp)
{
  g_return_if_fail (!window->override_redirect);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Unshading %s\n", window->desc);
  if (window->shaded)
    {
      window->shaded = FALSE;
      meta_window_queue(window, META_QUEUE_MOVE_RESIZE | META_QUEUE_CALC_SHOWING);

      /* focus the window */
      meta_topic (META_DEBUG_FOCUS,
                  "Focusing window %s after unshading it\n",
                  window->desc);
      meta_window_focus (window, timestamp);

      set_net_wm_state (window);
    }
}

static gboolean
unminimize_func (MetaWindow *window,
                 void       *data)
{
  meta_window_unminimize (window);
  return TRUE;
}

static void
unminimize_window_and_all_transient_parents (MetaWindow *window)
{
  meta_window_unminimize (window);
  meta_window_foreach_ancestor (window, unminimize_func, NULL);
}

static void
window_activate (MetaWindow     *window,
                 guint32         timestamp,
                 MetaClientType  source_indication,
                 MetaWorkspace  *workspace)
{
  gboolean can_ignore_outdated_timestamps;
  meta_topic (META_DEBUG_FOCUS,
              "_NET_ACTIVE_WINDOW message sent for %s at time %u "
              "by client type %u.\n",
              window->desc, timestamp, source_indication);

  /* Older EWMH spec didn't specify a timestamp; we decide to honor these only
   * if the app specifies that it is a pager.
   *
   * Update: Unconditionally honor 0 timestamps for now; we'll fight
   * that battle later.  Just remove the "FALSE &&" in order to only
   * honor 0 timestamps for pagers.
   */
  can_ignore_outdated_timestamps =
    (timestamp != 0 || (FALSE && source_indication != META_CLIENT_TYPE_PAGER));
  if (XSERVER_TIME_IS_BEFORE (timestamp, window->display->last_user_time) &&
      can_ignore_outdated_timestamps)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "last_user_time (%u) is more recent; ignoring "
                  " _NET_ACTIVE_WINDOW message.\n",
                  window->display->last_user_time);
      meta_window_set_demands_attention(window);
      return;
    }

  /* For those stupid pagers, get a valid timestamp and show a warning */
  if (timestamp == 0)
    {
      meta_warning ("meta_window_activate called by a pager with a 0 timestamp; "
                    "the pager needs to be fixed.\n");
      timestamp = meta_display_get_current_time_roundtrip (window->display);
    }

  meta_window_set_user_time (window, timestamp);

  /* disable show desktop mode unless we're a desktop component */
  maybe_leave_show_desktop_mode (window);

  /* Get window on current or given workspace */
  if (workspace == NULL)
    workspace = window->screen->active_workspace;

  /* For non-transient windows, we just set up a pulsing indicator,
     rather than move windows or workspaces.
     See http://bugzilla.gnome.org/show_bug.cgi?id=482354 */
  if (window->xtransient_for == None &&
      !meta_window_located_on_workspace (window, workspace))
    {
      meta_window_set_demands_attention (window);
      /* We've marked it as demanding, don't need to do anything else. */
      return;
    }
  else if (window->xtransient_for != None)
    {
      /* Move transients to current workspace - preference dialogs should appear over
         the source window.  */
    meta_window_change_workspace (window, workspace);
    }

  if (window->shaded)
    meta_window_unshade (window, timestamp);

  unminimize_window_and_all_transient_parents (window);

  if (meta_prefs_get_raise_on_click () ||
      source_indication == META_CLIENT_TYPE_PAGER)
    meta_window_raise (window);

  meta_topic (META_DEBUG_FOCUS,
              "Focusing window %s due to activation\n",
              window->desc);
  meta_window_focus (window, timestamp);
}

/* This function exists since most of the functionality in window_activate
 * is useful for Mutter, but Mutter shouldn't need to specify a client
 * type for itself.  ;-)
 */
void
meta_window_activate (MetaWindow     *window,
                      guint32         timestamp)
{
  g_return_if_fail (!window->override_redirect);

  /* We're not really a pager, but the behavior we want is the same as if
   * we were such.  If we change the pager behavior later, we could revisit
   * this and just add extra flags to window_activate.
   */
  window_activate (window, timestamp, META_CLIENT_TYPE_PAGER, NULL);
}

void
meta_window_activate_with_workspace (MetaWindow     *window,
                                     guint32         timestamp,
                                     MetaWorkspace  *workspace)
{
  g_return_if_fail (!window->override_redirect);

  /* We're not really a pager, but the behavior we want is the same as if
   * we were such.  If we change the pager behavior later, we could revisit
   * this and just add extra flags to window_activate.
   */
  window_activate (window, timestamp, META_CLIENT_TYPE_APPLICATION, workspace);
}

/* Manually fix all the weirdness explained in the big comment at the
 * beginning of meta_window_move_resize_internal() giving positions
 * expected by meta_window_constrain (i.e. positions & sizes of the
 * internal or client window).
 */
static void
adjust_for_gravity (MetaWindow        *window,
                    MetaFrameBorders  *borders,
                    gboolean           coords_assume_border,
                    int                gravity,
                    MetaRectangle     *rect)
{
  int ref_x, ref_y;
  int bw;
  int child_x, child_y;
  int frame_width, frame_height;

  if (coords_assume_border)
    bw = window->border_width;
  else
    bw = 0;

  if (borders)
    {
      child_x = borders->visible.left;
      child_y = borders->visible.top;
      frame_width = child_x + rect->width + borders->visible.right;
      frame_height = child_y + rect->height + borders->visible.bottom;
    }
  else
    {
      child_x = 0;
      child_y = 0;
      frame_width = rect->width;
      frame_height = rect->height;
    }

  /* We're computing position to pass to window_move, which is
   * the position of the client window (StaticGravity basically)
   *
   * (see WM spec description of gravity computation, but note that
   * their formulas assume we're honoring the border width, rather
   * than compensating for having turned it off)
   */
  switch (gravity)
    {
    case NorthWestGravity:
      ref_x = rect->x;
      ref_y = rect->y;
      break;
    case NorthGravity:
      ref_x = rect->x + rect->width / 2 + bw;
      ref_y = rect->y;
      break;
    case NorthEastGravity:
      ref_x = rect->x + rect->width + bw * 2;
      ref_y = rect->y;
      break;
    case WestGravity:
      ref_x = rect->x;
      ref_y = rect->y + rect->height / 2 + bw;
      break;
    case CenterGravity:
      ref_x = rect->x + rect->width / 2 + bw;
      ref_y = rect->y + rect->height / 2 + bw;
      break;
    case EastGravity:
      ref_x = rect->x + rect->width + bw * 2;
      ref_y = rect->y + rect->height / 2 + bw;
      break;
    case SouthWestGravity:
      ref_x = rect->x;
      ref_y = rect->y + rect->height + bw * 2;
      break;
    case SouthGravity:
      ref_x = rect->x + rect->width / 2 + bw;
      ref_y = rect->y + rect->height + bw * 2;
      break;
    case SouthEastGravity:
      ref_x = rect->x + rect->width + bw * 2;
      ref_y = rect->y + rect->height + bw * 2;
      break;
    case StaticGravity:
    default:
      ref_x = rect->x;
      ref_y = rect->y;
      break;
    }

  switch (gravity)
    {
    case NorthWestGravity:
      rect->x = ref_x + child_x;
      rect->y = ref_y + child_y;
      break;
    case NorthGravity:
      rect->x = ref_x - frame_width / 2 + child_x;
      rect->y = ref_y + child_y;
      break;
    case NorthEastGravity:
      rect->x = ref_x - frame_width + child_x;
      rect->y = ref_y + child_y;
      break;
    case WestGravity:
      rect->x = ref_x + child_x;
      rect->y = ref_y - frame_height / 2 + child_y;
      break;
    case CenterGravity:
      rect->x = ref_x - frame_width / 2 + child_x;
      rect->y = ref_y - frame_height / 2 + child_y;
      break;
    case EastGravity:
      rect->x = ref_x - frame_width + child_x;
      rect->y = ref_y - frame_height / 2 + child_y;
      break;
    case SouthWestGravity:
      rect->x = ref_x + child_x;
      rect->y = ref_y - frame_height + child_y;
      break;
    case SouthGravity:
      rect->x = ref_x - frame_width / 2 + child_x;
      rect->y = ref_y - frame_height + child_y;
      break;
    case SouthEastGravity:
      rect->x = ref_x - frame_width + child_x;
      rect->y = ref_y - frame_height + child_y;
      break;
    case StaticGravity:
    default:
      rect->x = ref_x;
      rect->y = ref_y;
      break;
    }
}

static gboolean
static_gravity_works (MetaDisplay *display)
{
  return display->static_gravity_works;
}

#ifdef HAVE_XSYNC
static void
send_sync_request (MetaWindow *window)
{
  XSyncValue value;
  XClientMessageEvent ev;

  window->sync_request_serial++;

  XSyncIntToValue (&value, window->sync_request_serial);

  ev.type = ClientMessage;
  ev.window = window->xwindow;
  ev.message_type = window->display->atom_WM_PROTOCOLS;
  ev.format = 32;
  ev.data.l[0] = window->display->atom__NET_WM_SYNC_REQUEST;
  /* FIXME: meta_display_get_current_time() is bad, but since calls
   * come from meta_window_move_resize_internal (which in turn come
   * from all over), I'm not sure what we can do to fix it.  Do we
   * want to use _roundtrip, though?
   */
  ev.data.l[1] = meta_display_get_current_time (window->display);
  ev.data.l[2] = XSyncValueLow32 (value);
  ev.data.l[3] = XSyncValueHigh32 (value);

  /* We don't need to trap errors here as we are already
   * inside an error_trap_push()/pop() pair.
   */
  XSendEvent (window->display->xdisplay,
	      window->xwindow, False, 0, (XEvent*) &ev);

  g_get_current_time (&window->sync_request_time);
}
#endif

static gboolean
maybe_move_attached_dialog (MetaWindow *window,
                            void       *data)
{
  if (meta_window_is_attached_dialog (window))
    /* It ignores x,y for such a dialog  */
    meta_window_move (window, FALSE, 0, 0);

  return FALSE;
}

/**
 * meta_window_get_monitor:
 * @window: a #MetaWindow
 *
 * Gets index of the monitor that this window is on.
 *
 * Return Value: The index of the monitor in the screens monitor list
 */
int
meta_window_get_monitor (MetaWindow *window)
{
  return window->monitor->number;
}

/* This is called when the monitor setup has changed. The window->monitor
 * reference is still "valid", but refer to the previous monitor setup */
void
meta_window_update_for_monitors_changed (MetaWindow *window)
{
  const MetaMonitorInfo *old, *new;
  int i;

  if (window->type == META_WINDOW_DESKTOP)
    return;

  old = window->monitor;

  /* Start on primary */
  new = &window->screen->monitor_infos[window->screen->primary_monitor_index];

  /* But, if we can find the old output on a new monitor, use that */
  for (i = 0; i < window->screen->n_monitor_infos; i++)
    {
      MetaMonitorInfo *info = &window->screen->monitor_infos[i];

      if (info->output == old->output)
        {
          new = info;
          break;
        }
    }

  if (window->tile_mode != META_TILE_NONE)
    window->tile_monitor_number = new->number;

  /* This will eventually reach meta_window_update_monitor that
   * will send leave/enter-monitor events. The old != new monitor
   * check will always fail (due to the new monitor_infos set) so
   * we will always send the events, even if the new and old monitor
   * index is the same. That is right, since the enumeration of the
   * monitors changed and the same index could be refereing
   * to a different monitor. */
  meta_window_move_between_rects (window,
                                  &old->rect,
                                  &new->rect);
}

static void
meta_window_update_monitor (MetaWindow *window)
{
  const MetaMonitorInfo *old;

  old = window->monitor;
  window->monitor = meta_screen_get_monitor_for_window (window->screen, window);
  if (old != window->monitor)
    {
      meta_window_update_on_all_workspaces (window);

      /* If workspaces only on primary and we moved back to primary, ensure that the
       * window is now in that workspace. We do this because while the window is on a
       * non-primary monitor it is always visible, so it would be very jarring if it
       * disappeared when it crossed the monitor border.
       * The one time we want it to both change to the primary monitor and a non-active
       * workspace is when dropping the window on some other workspace thumbnail directly.
       * That should be handled by explicitly moving the window before changing the
       * workspace
       * Don't do this if old == NULL, because thats what happens when starting up, and
       * we don't want to move all windows around from a previous WM instance. Nor do
       * we want it when moving from one primary monitor to another (can happen during
       * screen reconfiguration.
       */
      if (meta_prefs_get_workspaces_only_on_primary () &&
          meta_window_is_on_primary_monitor (window)  &&
          old != NULL && !old->is_primary &&
          window->screen->active_workspace != window->workspace)
        meta_window_change_workspace (window, window->screen->active_workspace);

      if (old)
        g_signal_emit_by_name (window->screen, "window-left-monitor", old->number, window);
      g_signal_emit_by_name (window->screen, "window-entered-monitor", window->monitor->number, window);

      /* If we're changing monitors, we need to update the has_maximize_func flag,
       * as the working area has changed. */
      recalc_window_features (window);
    }
}

static void
meta_window_move_resize_internal (MetaWindow          *window,
                                  MetaMoveResizeFlags  flags,
                                  int                  gravity,
                                  int                  root_x_nw,
                                  int                  root_y_nw,
                                  int                  w,
                                  int                  h)
{
  /* meta_window_move_resize_internal gets called with very different
   * meanings for root_x_nw and root_y_nw.  w & h are always the area
   * of the inner or client window (i.e. excluding the frame) and
   * gravity is the relevant gravity associated with the request (note
   * that gravity is ignored for move-only operations unless its
   * e.g. a configure request).  The location is different for
   * different cases because of how this function gets called; note
   * that in all cases what we want to find out is the upper left
   * corner of the position of the inner window:
   *
   *   Case | Called from (flags; gravity)
   *   -----+-----------------------------------------------
   *    1   | A resize only ConfigureRequest
   *    1   | meta_window_resize
   *    1   | meta_window_resize_with_gravity
   *    2   | New window
   *    2   | Session restore
   *    2   | A not-resize-only ConfigureRequest/net_moveresize_window request
   *    3   | meta_window_move
   *    3   | meta_window_move_resize
   *
   * For each of the cases, root_x_nw and root_y_nw must be treated as follows:
   *
   *   (1) They should be entirely ignored; instead the previous position
   *       and size of the window should be resized according to the given
   *       gravity in order to determine the new position of the window.
   *   (2) Needs to be fixed up by adjust_for_gravity() as these
   *       coordinates are relative to some corner or side of the outer
   *       window (except for the case of StaticGravity) and we want to
   *       know the location of the upper left corner of the inner window.
   *   (3) These values are already the desired positon of the NW corner
   *       of the inner window
   */
  XWindowChanges values;
  unsigned int mask;
  gboolean need_configure_notify;
  MetaFrameBorders borders;
  gboolean need_move_client = FALSE;
  gboolean need_move_frame = FALSE;
  gboolean need_resize_client = FALSE;
  gboolean need_resize_frame = FALSE;
  int size_dx;
  int size_dy;
  gboolean frame_shape_changed = FALSE;
  gboolean is_configure_request;
  gboolean do_gravity_adjust;
  gboolean is_user_action;
  gboolean configure_frame_first;
  gboolean use_static_gravity;
  /* used for the configure request, but may not be final
   * destination due to StaticGravity etc.
   */
  int client_move_x;
  int client_move_y;
  MetaRectangle new_rect;
  MetaRectangle old_rect;

  g_return_if_fail (!window->override_redirect);

  is_configure_request = (flags & META_IS_CONFIGURE_REQUEST) != 0;
  do_gravity_adjust = (flags & META_DO_GRAVITY_ADJUST) != 0;
  is_user_action = (flags & META_IS_USER_ACTION) != 0;

  /* The action has to be a move or a resize or both... */
  g_assert (flags & (META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION));

  /* We don't need it in the idle queue anymore. */
  meta_window_unqueue (window, META_QUEUE_MOVE_RESIZE);

  meta_window_get_client_root_coords (window, &old_rect);

  meta_topic (META_DEBUG_GEOMETRY,
              "Move/resize %s to %d,%d %dx%d%s%s from %d,%d %dx%d\n",
              window->desc, root_x_nw, root_y_nw, w, h,
              is_configure_request ? " (configure request)" : "",
              is_user_action ? " (user move/resize)" : "",
              old_rect.x, old_rect.y, old_rect.width, old_rect.height);

  meta_frame_calc_borders (window->frame,
                           &borders);

  new_rect.x = root_x_nw;
  new_rect.y = root_y_nw;
  new_rect.width  = w;
  new_rect.height = h;

  /* If this is a resize only, the position should be ignored and
   * instead obtained by resizing the old rectangle according to the
   * relevant gravity.
   */
  if ((flags & (META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION)) ==
      META_IS_RESIZE_ACTION)
    {
      meta_rectangle_resize_with_gravity (&old_rect,
                                          &new_rect,
                                          gravity,
                                          new_rect.width,
                                          new_rect.height);

      meta_topic (META_DEBUG_GEOMETRY,
                  "Compensated for gravity in resize action; new pos %d,%d\n",
                  new_rect.x, new_rect.y);
    }
  else if (is_configure_request || do_gravity_adjust)
    {
      adjust_for_gravity (window,
                          window->frame ? &borders : NULL,
                          /* configure request coords assume
                           * the border width existed
                           */
                          is_configure_request,
                          gravity,
                          &new_rect);

      meta_topic (META_DEBUG_GEOMETRY,
                  "Compensated for configure_request/do_gravity_adjust needing "
                  "weird positioning; new pos %d,%d\n",
                  new_rect.x, new_rect.y);
    }

  meta_window_constrain (window,
                         window->frame ? &borders : NULL,
                         flags,
                         gravity,
                         &old_rect,
                         &new_rect);

  w = new_rect.width;
  h = new_rect.height;
  root_x_nw = new_rect.x;
  root_y_nw = new_rect.y;

  if (w != window->rect.width ||
      h != window->rect.height)
    need_resize_client = TRUE;

  window->rect.width = w;
  window->rect.height = h;

  if (window->frame)
    {
      int frame_size_dx, frame_size_dy;
      int new_w, new_h;

      new_w = window->rect.width + borders.total.left + borders.total.right;

      if (window->shaded)
        new_h = borders.total.top;
      else
        new_h = window->rect.height + borders.total.top + borders.total.bottom;

      frame_size_dx = new_w - window->frame->rect.width;
      frame_size_dy = new_h - window->frame->rect.height;

      need_resize_frame = (frame_size_dx != 0 || frame_size_dy != 0);

      window->frame->rect.width = new_w;
      window->frame->rect.height = new_h;

      meta_topic (META_DEBUG_GEOMETRY,
                  "Calculated frame size %dx%d\n",
                  window->frame->rect.width,
                  window->frame->rect.height);
    }

  /* For nice effect, when growing the window we want to move/resize
   * the frame first, when shrinking the window we want to move/resize
   * the client first. If we grow one way and shrink the other,
   * see which way we're moving "more"
   *
   * Mail from Owen subject "Suggestion: Gravity and resizing from the left"
   * http://mail.gnome.org/archives/wm-spec-list/1999-November/msg00088.html
   *
   * An annoying fact you need to know in this code is that StaticGravity
   * does nothing if you _only_ resize or _only_ move the frame;
   * it must move _and_ resize, otherwise you get NorthWestGravity
   * behavior. The move and resize must actually occur, it is not
   * enough to set CWX | CWWidth but pass in the current size/pos.
   */

  if (window->frame)
    {
      int new_x, new_y;
      int frame_pos_dx, frame_pos_dy;

      /* Compute new frame coords */
      new_x = root_x_nw - borders.total.left;
      new_y = root_y_nw - borders.total.top;

      frame_pos_dx = new_x - window->frame->rect.x;
      frame_pos_dy = new_y - window->frame->rect.y;

      need_move_frame = (frame_pos_dx != 0 || frame_pos_dy != 0);

      window->frame->rect.x = new_x;
      window->frame->rect.y = new_y;

      /* If frame will both move and resize, then StaticGravity
       * on the child window will kick in and implicitly move
       * the child with respect to the frame. The implicit
       * move will keep the child in the same place with
       * respect to the root window. If frame only moves
       * or only resizes, then the child will just move along
       * with the frame.
       */

      /* window->rect.x, window->rect.y are relative to frame,
       * remember they are the server coords
       */

      new_x = borders.total.left;
      new_y = borders.total.top;

      if (need_resize_frame && need_move_frame &&
          static_gravity_works (window->display))
        {
          /* static gravity kicks in because frame
           * is both moved and resized
           */
          /* when we move the frame by frame_pos_dx, frame_pos_dy the
           * client will implicitly move relative to frame by the
           * inverse delta.
           *
           * When moving client then frame, we move the client by the
           * frame delta, to be canceled out by the implicit move by
           * the inverse frame delta, resulting in a client at new_x,
           * new_y.
           *
           * When moving frame then client, we move the client
           * by the same delta as the frame, because the client
           * was "left behind" by the frame - resulting in a client
           * at new_x, new_y.
           *
           * In both cases we need to move the client window
           * in all cases where we had to move the frame window.
           */

          client_move_x = new_x + frame_pos_dx;
          client_move_y = new_y + frame_pos_dy;

          if (need_move_frame)
            need_move_client = TRUE;

          use_static_gravity = TRUE;
        }
      else
        {
          client_move_x = new_x;
          client_move_y = new_y;

          if (client_move_x != window->rect.x ||
              client_move_y != window->rect.y)
            need_move_client = TRUE;

          use_static_gravity = FALSE;
        }

      /* This is the final target position, but not necessarily what
       * we pass to XConfigureWindow, due to StaticGravity implicit
       * movement.
       */
      window->rect.x = new_x;
      window->rect.y = new_y;
    }
  else
    {
      if (root_x_nw != window->rect.x ||
          root_y_nw != window->rect.y)
        need_move_client = TRUE;

      window->rect.x = root_x_nw;
      window->rect.y = root_y_nw;

      client_move_x = window->rect.x;
      client_move_y = window->rect.y;

      use_static_gravity = FALSE;
    }

  /* If frame extents have changed, fill in other frame fields and
     change frame's extents property. */
  if (window->frame &&
      (window->frame->child_x != borders.total.left ||
       window->frame->child_y != borders.total.top ||
       window->frame->right_width != borders.total.right ||
       window->frame->bottom_height != borders.total.bottom))
    {
      window->frame->child_x = borders.total.left;
      window->frame->child_y = borders.total.top;
      window->frame->right_width = borders.total.right;
      window->frame->bottom_height = borders.total.bottom;

      update_net_frame_extents (window);
    }

  /* See ICCCM 4.1.5 for when to send ConfigureNotify */

  need_configure_notify = FALSE;

  /* If this is a configure request and we change nothing, then we
   * must send configure notify.
   */
  if  (is_configure_request &&
       !(need_move_client || need_move_frame ||
         need_resize_client || need_resize_frame ||
         window->border_width != 0))
    need_configure_notify = TRUE;

  /* We must send configure notify if we move but don't resize, since
   * the client window may not get a real event
   */
  if ((need_move_client || need_move_frame) &&
      !(need_resize_client || need_resize_frame))
    need_configure_notify = TRUE;

  /* MapRequest events with a PPosition or UPosition hint with a frame
   * are moved by mutter without resizing; send a configure notify
   * in such cases.  See #322840.  (Note that window->constructing is
   * only true iff this call is due to a MapRequest, and when
   * PPosition/UPosition hints aren't set, mutter seems to send a
   * ConfigureNotify anyway due to the above code.)
   */
  if (window->constructing && window->frame &&
      ((window->size_hints.flags & PPosition) ||
       (window->size_hints.flags & USPosition)))
    need_configure_notify = TRUE;

  /* The rest of this function syncs our new size/pos with X as
   * efficiently as possible
   */

  /* configure frame first if we grow more than we shrink
   */
  size_dx = w - window->rect.width;
  size_dy = h - window->rect.height;

  configure_frame_first = (size_dx + size_dy >= 0);

  if (use_static_gravity)
    meta_window_set_gravity (window, StaticGravity);

  if (configure_frame_first && window->frame)
    frame_shape_changed = meta_frame_sync_to_window (window->frame,
                                                     gravity,
                                                     need_move_frame, need_resize_frame);

  values.border_width = 0;
  values.x = client_move_x;
  values.y = client_move_y;
  values.width = window->rect.width;
  values.height = window->rect.height;

  mask = 0;
  if (is_configure_request && window->border_width != 0)
    mask |= CWBorderWidth; /* must force to 0 */
  if (need_move_client)
    mask |= (CWX | CWY);
  if (need_resize_client)
    mask |= (CWWidth | CWHeight);

  if (mask != 0)
    {
      {
        int newx, newy;
        meta_window_get_position (window, &newx, &newy);
        meta_topic (META_DEBUG_GEOMETRY,
                    "Syncing new client geometry %d,%d %dx%d, border: %s pos: %s size: %s\n",
                    newx, newy,
                    window->rect.width, window->rect.height,
                    mask & CWBorderWidth ? "true" : "false",
                    need_move_client ? "true" : "false",
                    need_resize_client ? "true" : "false");
      }

      meta_error_trap_push (window->display);

#ifdef HAVE_XSYNC
      if (window->sync_request_counter != None &&
	  window->display->grab_sync_request_alarm != None &&
	  window->sync_request_time.tv_usec == 0 &&
	  window->sync_request_time.tv_sec == 0)
	{
	  /* turn off updating */
	  if (window->display->compositor)
	    meta_compositor_set_updates (window->display->compositor, window, FALSE);

	  send_sync_request (window);
	}
#endif

      XConfigureWindow (window->display->xdisplay,
                        window->xwindow,
                        mask,
                        &values);

      meta_error_trap_pop (window->display);
    }

  if (!configure_frame_first && window->frame)
    frame_shape_changed = meta_frame_sync_to_window (window->frame,
                                                     gravity,
                                                     need_move_frame, need_resize_frame);

  /* Put gravity back to be nice to lesser window managers */
  if (use_static_gravity)
    meta_window_set_gravity (window, NorthWestGravity);

  if (need_configure_notify)
    send_configure_notify (window);

  if (!window->placed && window->force_save_user_rect && !window->fullscreen)
    force_save_user_window_placement (window);
  else if (is_user_action)
    save_user_window_placement (window);

  if (need_move_frame || need_resize_frame ||
      need_move_client || need_resize_client)
    {
      int newx, newy;
      meta_window_get_position (window, &newx, &newy);
      meta_topic (META_DEBUG_GEOMETRY,
                  "New size/position %d,%d %dx%d (user %d,%d %dx%d)\n",
                  newx, newy, window->rect.width, window->rect.height,
                  window->user_rect.x, window->user_rect.y,
                  window->user_rect.width, window->user_rect.height);
      if (window->display->compositor)
        meta_compositor_sync_window_geometry (window->display->compositor,
                                              window);
    }
  else
    {
      meta_topic (META_DEBUG_GEOMETRY, "Size/position not modified\n");
    }

  meta_window_refresh_resize_popup (window);

  meta_window_update_monitor (window);

  /* Invariants leaving this function are:
   *   a) window->rect and frame->rect reflect the actual
   *      server-side size/pos of window->xwindow and frame->xwindow
   *   b) all constraints are obeyed by window->rect and frame->rect
   */

  if (frame_shape_changed && window->frame_bounds)
    {
      cairo_region_destroy (window->frame_bounds);
      window->frame_bounds = NULL;
    }

  meta_window_foreach_transient (window, maybe_move_attached_dialog, NULL);

  meta_stack_update_window_tile_matches (window->screen->stack,
                                         window->screen->active_workspace);
}

/**
 * meta_window_resize:
 * @window: a #MetaWindow
 * @user_op: bool to indicate whether or not this is a user operation
 * @w: desired width
 * @h: desired height
 *
 * Resize the window to the desired size.
 */
void
meta_window_resize (MetaWindow  *window,
                    gboolean     user_op,
                    int          w,
                    int          h)
{
  int x, y;
  MetaMoveResizeFlags flags;

  g_return_if_fail (!window->override_redirect);

  meta_window_get_position (window, &x, &y);

  flags = (user_op ? META_IS_USER_ACTION : 0) | META_IS_RESIZE_ACTION;
  meta_window_move_resize_internal (window,
                                    flags,
                                    NorthWestGravity,
                                    x, y, w, h);
}

/**
 * meta_window_move:
 * @window: a #MetaWindow
 * @user_op: bool to indicate whether or not this is a user operation
 * @root_x_nw: desired x pos
 * @root_y_nw: desired y pos
 *
 * Moves the window to the desired location on window's assigned workspace.
 * NOTE: does NOT place according to the origin of the enclosing
 * frame/window-decoration, but according to the origin of the window,
 * itself.
 */
void
meta_window_move (MetaWindow  *window,
                  gboolean     user_op,
                  int          root_x_nw,
                  int          root_y_nw)
{
  MetaMoveResizeFlags flags;

  g_return_if_fail (!window->override_redirect);

  flags = (user_op ? META_IS_USER_ACTION : 0) | META_IS_MOVE_ACTION;

  meta_window_move_resize_internal (window,
                                    flags,
                                    NorthWestGravity,
                                    root_x_nw, root_y_nw,
                                    window->rect.width,
                                    window->rect.height);
}
/**
 * meta_window_move_frame:
 * @window: a #MetaWindow
 * @user_op: bool to indicate whether or not this is a user operation
 * @root_x_nw: desired x pos
 * @root_y_nw: desired y pos
 *
 * Moves the window to the desired location on window's assigned
 * workspace, using the northwest edge of the frame as the reference,
 * instead of the actual window's origin, but only if a frame is present.
 * Otherwise, acts identically to meta_window_move().
 */
void
meta_window_move_frame (MetaWindow  *window,
                  gboolean     user_op,
                  int          root_x_nw,
                  int          root_y_nw)
{
  int x = root_x_nw;
  int y = root_y_nw;

  if (window->frame)
    {
      MetaFrameBorders borders;
      meta_frame_calc_borders (window->frame, &borders);

      /* root_x_nw and root_y_nw correspond to where the top of
       * the visible frame should be. Offset by the distance between
       * the origin of the window and the origin of the enclosing
       * window decorations.
       */
      x += window->frame->child_x - borders.invisible.left;
      y += window->frame->child_y - borders.invisible.top;
    }
  meta_window_move (window, user_op, x, y);
}

static void
meta_window_move_between_rects (MetaWindow  *window,
                                const MetaRectangle *old_area,
                                const MetaRectangle *new_area)
{
  int rel_x, rel_y;
  double scale_x, scale_y;

  rel_x = window->user_rect.x - old_area->x;
  rel_y = window->user_rect.y - old_area->y;
  scale_x = (double)new_area->width / old_area->width;
  scale_y = (double)new_area->height / old_area->height;

  window->user_rect.x = new_area->x + rel_x * scale_x;
  window->user_rect.y = new_area->y + rel_y * scale_y;
  window->saved_rect.x = window->user_rect.x;
  window->saved_rect.y = window->user_rect.y;

  meta_window_move_resize (window, FALSE,
                           window->user_rect.x,
                           window->user_rect.y,
                           window->user_rect.width,
                           window->user_rect.height);
}

/**
 * meta_window_move_resize_frame:
 * @window: a #MetaWindow
 * @user_op: bool to indicate whether or not this is a user operation
 * @root_x_nw: new x
 * @root_y_nw: new y
 * @w: desired width
 * @h: desired height
 *
 * Resizes the window so that its outer bounds (including frame)
 * fit within the given rect
 */
void
meta_window_move_resize_frame (MetaWindow  *window,
                               gboolean     user_op,
                               int          root_x_nw,
                               int          root_y_nw,
                               int          w,
                               int          h)
{
  MetaFrameBorders borders;

  meta_frame_calc_borders (window->frame, &borders);
  /* offset by the distance between the origin of the window
   * and the origin of the enclosing window decorations ( + border)
   */
  root_x_nw += borders.visible.left;
  root_y_nw += borders.visible.top;
  w -= borders.visible.left + borders.visible.right;
  h -= borders.visible.top + borders.visible.bottom;

  meta_window_move_resize (window, user_op, root_x_nw, root_y_nw, w, h);
}

/**
 * meta_window_move_to_monitor:
 * @window: a #MetaWindow
 * @monitor: desired monitor index
 *
 * Moves the window to the monitor with index @monitor, keeping
 * the relative position of the window's top left corner.
 */
void
meta_window_move_to_monitor (MetaWindow  *window,
                             int          monitor)
{
  MetaRectangle old_area, new_area;

  if (monitor == window->monitor->number)
    return;

  meta_window_get_work_area_for_monitor (window,
                                         window->monitor->number,
                                         &old_area);
  meta_window_get_work_area_for_monitor (window,
                                         monitor,
                                         &new_area);

  if (window->tile_mode != META_TILE_NONE)
    window->tile_monitor_number = monitor;

  meta_window_move_between_rects (window, &old_area, &new_area);
}

void
meta_window_move_resize (MetaWindow  *window,
                         gboolean     user_op,
                         int          root_x_nw,
                         int          root_y_nw,
                         int          w,
                         int          h)
{
  MetaMoveResizeFlags flags;

  g_return_if_fail (!window->override_redirect);

  flags = (user_op ? META_IS_USER_ACTION : 0) |
    META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION;
  meta_window_move_resize_internal (window,
                                    flags,
                                    NorthWestGravity,
                                    root_x_nw, root_y_nw,
                                    w, h);
}

void
meta_window_resize_with_gravity (MetaWindow *window,
                                 gboolean     user_op,
                                 int          w,
                                 int          h,
                                 int          gravity)
{
  int x, y;
  MetaMoveResizeFlags flags;

  meta_window_get_position (window, &x, &y);

  flags = (user_op ? META_IS_USER_ACTION : 0) | META_IS_RESIZE_ACTION;
  meta_window_move_resize_internal (window,
                                    flags,
                                    gravity,
                                    x, y, w, h);
}

static void
meta_window_move_resize_now (MetaWindow  *window)
{
  /* If constraints have changed then we want to snap back to wherever
   * the user had the window.  We use user_rect for this reason.  See
   * also bug 426519 comment 3.
   */
  meta_window_move_resize (window, FALSE,
                           window->user_rect.x,
                           window->user_rect.y,
                           window->user_rect.width,
                           window->user_rect.height);
}

static gboolean
idle_move_resize (gpointer data)
{
  GSList *tmp;
  GSList *copy;
  guint queue_index = GPOINTER_TO_INT (data);

  meta_topic (META_DEBUG_GEOMETRY, "Clearing the move_resize queue\n");

  /* Work with a copy, for reentrancy. The allowed reentrancy isn't
   * complete; destroying a window while we're in here would result in
   * badness. But it's OK to queue/unqueue move_resizes.
   */
  copy = g_slist_copy (queue_pending[queue_index]);
  g_slist_free (queue_pending[queue_index]);
  queue_pending[queue_index] = NULL;
  queue_later[queue_index] = 0;

  destroying_windows_disallowed += 1;

  tmp = copy;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      /* As a side effect, sets window->move_resize_queued = FALSE */
      meta_window_move_resize_now (window);

      tmp = tmp->next;
    }

  g_slist_free (copy);

  destroying_windows_disallowed -= 1;

  return FALSE;
}

/**
 * meta_window_configure_notify: (skip)
 * @window: a #MetaWindow
 * @event: a #XConfigureEvent
 *
 * This is used to notify us of an unrequested configuration
 * (only applicable to override redirect windows)
 */
void
meta_window_configure_notify (MetaWindow      *window,
                              XConfigureEvent *event)
{
  g_assert (window->override_redirect);
  g_assert (window->frame == NULL);

  window->rect.x = event->x;
  window->rect.y = event->y;
  window->rect.width = event->width;
  window->rect.height = event->height;
  meta_window_update_monitor (window);

  if (!event->override_redirect && !event->send_event)
    meta_warning ("Unhandled change of windows override redirect status\n");

  if (window->display->compositor)
    meta_compositor_sync_window_geometry (window->display->compositor, window);
}

void
meta_window_get_position (MetaWindow  *window,
                          int         *x,
                          int         *y)
{
  if (window->frame)
    {
      if (x)
        *x = window->frame->rect.x + window->frame->child_x;
      if (y)
        *y = window->frame->rect.y + window->frame->child_y;
    }
  else
    {
      if (x)
        *x = window->rect.x;
      if (y)
        *y = window->rect.y;
    }
}

void
meta_window_get_client_root_coords (MetaWindow    *window,
                                    MetaRectangle *rect)
{
  meta_window_get_position (window, &rect->x, &rect->y);
  rect->width  = window->rect.width;
  rect->height = window->rect.height;
}

void
meta_window_get_gravity_position (MetaWindow  *window,
                                  int          gravity,
                                  int         *root_x,
                                  int         *root_y)
{
  MetaRectangle frame_extents;
  int w, h;
  int x, y;

  w = window->rect.width;
  h = window->rect.height;

  if (gravity == StaticGravity)
    {
      frame_extents = window->rect;
      if (window->frame)
        {
          frame_extents.x = window->frame->rect.x + window->frame->child_x;
          frame_extents.y = window->frame->rect.y + window->frame->child_y;
        }
    }
  else
    {
      if (window->frame == NULL)
        frame_extents = window->rect;
      else
        frame_extents = window->frame->rect;
    }

  x = frame_extents.x;
  y = frame_extents.y;

  switch (gravity)
    {
    case NorthGravity:
    case CenterGravity:
    case SouthGravity:
      /* Find center of frame. */
      x += frame_extents.width / 2;
      /* Center client window on that point. */
      x -= w / 2;
      break;

    case SouthEastGravity:
    case EastGravity:
    case NorthEastGravity:
      /* Find right edge of frame */
      x += frame_extents.width;
      /* Align left edge of client at that point. */
      x -= w;
      break;
    default:
      break;
    }

  switch (gravity)
    {
    case WestGravity:
    case CenterGravity:
    case EastGravity:
      /* Find center of frame. */
      y += frame_extents.height / 2;
      /* Center client window there. */
      y -= h / 2;
      break;
    case SouthWestGravity:
    case SouthGravity:
    case SouthEastGravity:
      /* Find south edge of frame */
      y += frame_extents.height;
      /* Place bottom edge of client there */
      y -= h;
      break;
    default:
      break;
    }

  if (root_x)
    *root_x = x;
  if (root_y)
    *root_y = y;
}

void
meta_window_get_geometry (MetaWindow  *window,
                          int         *x,
                          int         *y,
                          int         *width,
                          int         *height)
{
  meta_window_get_gravity_position (window,
                                    window->size_hints.win_gravity,
                                    x, y);

  *width = (window->rect.width - window->size_hints.base_width) /
    window->size_hints.width_inc;
  *height = (window->rect.height - window->size_hints.base_height) /
    window->size_hints.height_inc;
}

/**
 * meta_window_get_input_rect:
 * @window: a #MetaWindow
 * @rect: (out): pointer to an allocated #MetaRectangle
 *
 * Gets the rectangle that bounds @window that is responsive to mouse events.
 * This includes decorations - the visible portion of its border - and (if
 * present) any invisible area that we make make responsive to mouse clicks in
 * order to allow convenient border dragging.
 */
void
meta_window_get_input_rect (const MetaWindow *window,
                            MetaRectangle    *rect)
{
  if (window->frame)
    *rect = window->frame->rect;
  else
    *rect = window->rect;
}

/**
 * meta_window_get_outer_rect:
 * @window: a #MetaWindow
 * @rect: (out): pointer to an allocated #MetaRectangle
 *
 * Gets the rectangle that bounds @window that is responsive to mouse events.
 * This includes only what is visible; it doesn't include any extra reactive
 * area we add to the edges of windows.
 */
void
meta_window_get_outer_rect (const MetaWindow *window,
                            MetaRectangle    *rect)
{
  if (window->frame)
    {
      MetaFrameBorders borders;
      *rect = window->frame->rect;
      meta_frame_calc_borders (window->frame, &borders);

      rect->x += borders.invisible.left;
      rect->y += borders.invisible.top;
      rect->width  -= borders.invisible.left + borders.invisible.right;
      rect->height -= borders.invisible.top  + borders.invisible.bottom;
    }
  else
    *rect = window->rect;
}

const char*
meta_window_get_startup_id (MetaWindow *window)
{
  if (window->startup_id == NULL)
    {
      MetaGroup *group;

      group = meta_window_get_group (window);

      if (group != NULL)
        return meta_group_get_startup_id (group);
    }

  return window->startup_id;
}

static MetaWindow*
get_modal_transient (MetaWindow *window)
{
  GSList *windows;
  GSList *tmp;
  MetaWindow *modal_transient;

  /* A window can't be the transient of itself, but this is just for
   * convenience in the loop below; we manually fix things up at the
   * end if no real modal transient was found.
   */
  modal_transient = window;

  windows = meta_display_list_windows (window->display, META_LIST_DEFAULT);
  tmp = windows;
  while (tmp != NULL)
    {
      MetaWindow *transient = tmp->data;

      if (transient->xtransient_for == modal_transient->xwindow &&
          transient->wm_state_modal)
        {
          modal_transient = transient;
          tmp = windows;
          continue;
        }

      tmp = tmp->next;
    }

  g_slist_free (windows);

  if (window == modal_transient)
    modal_transient = NULL;

  return modal_transient;
}

/* XXX META_EFFECT_FOCUS */
void
meta_window_focus (MetaWindow  *window,
                   guint32      timestamp)
{
  MetaWindow *modal_transient;

  g_return_if_fail (!window->override_redirect);

  meta_topic (META_DEBUG_FOCUS,
              "Setting input focus to window %s, input: %d take_focus: %d\n",
              window->desc, window->input, window->take_focus);

  if (window->display->grab_window &&
      window->display->grab_window->all_keys_grabbed)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Current focus window %s has global keygrab, not focusing window %s after all\n",
                  window->display->grab_window->desc, window->desc);
      return;
    }

  modal_transient = get_modal_transient (window);
  if (modal_transient != NULL &&
      !modal_transient->unmanaging)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "%s has %s as a modal transient, so focusing it instead.\n",
                  window->desc, modal_transient->desc);
      if (!modal_transient->on_all_workspaces &&
          modal_transient->workspace != window->screen->active_workspace)
        meta_window_change_workspace (modal_transient,
                                      window->screen->active_workspace);
      window = modal_transient;
    }

  meta_window_flush_calc_showing (window);

  if ((!window->mapped || window->hidden) && !window->shaded)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Window %s is not showing, not focusing after all\n",
                  window->desc);
      return;
    }

  /* For output-only or shaded windows, focus the frame.
   * This seems to result in the client window getting key events
   * though, so I don't know if it's icccm-compliant.
   *
   * Still, we have to do this or keynav breaks for these windows.
   */
  if (window->frame &&
      (window->shaded ||
       !(window->input || window->take_focus)))
    {
      if (window->frame)
        {
          meta_topic (META_DEBUG_FOCUS,
                      "Focusing frame of %s\n", window->desc);
          meta_display_set_input_focus_window (window->display,
                                               window,
                                               TRUE,
                                               timestamp);
        }
    }
  else
    {
      if (window->input)
        {
          meta_topic (META_DEBUG_FOCUS,
                      "Setting input focus on %s since input = true\n",
                      window->desc);
          meta_display_set_input_focus_window (window->display,
                                               window,
                                               FALSE,
                                               timestamp);
        }

      if (window->take_focus)
        {
          meta_topic (META_DEBUG_FOCUS,
                      "Sending WM_TAKE_FOCUS to %s since take_focus = true\n",
                      window->desc);
          meta_window_send_icccm_message (window,
                                          window->display->atom_WM_TAKE_FOCUS,
                                          timestamp);
          window->display->expected_focus_window = window;
        }
    }

  if (window->wm_state_demands_attention)
    meta_window_unset_demands_attention(window);

/*  meta_effect_run_focus(window, NULL, NULL); */
}

static void
meta_window_change_workspace_without_transients (MetaWindow    *window,
                                                 MetaWorkspace *workspace)
{
  int old_workspace = -1;

  meta_verbose ("Changing window %s to workspace %d\n",
                window->desc, meta_workspace_index (workspace));

  if (!window->on_all_workspaces_requested)
    {
      old_workspace = meta_workspace_index (window->workspace);
    }

  /* unstick if stuck. meta_window_unstick would call
   * meta_window_change_workspace recursively if the window
   * is not in the active workspace.
   */
  if (window->on_all_workspaces_requested)
    meta_window_unstick (window);

  /* See if we're already on this space. If not, make sure we are */
  if (window->workspace != workspace)
    {
      meta_workspace_remove_window (window->workspace, window);
      meta_workspace_add_window (workspace, window);
      g_signal_emit (window, window_signals[WORKSPACE_CHANGED], 0,
                     old_workspace);
    }
}

static gboolean
change_workspace_foreach (MetaWindow *window,
                          void       *data)
{
  meta_window_change_workspace_without_transients (window, data);
  return TRUE;
}

void
meta_window_change_workspace (MetaWindow    *window,
                              MetaWorkspace *workspace)
{
  g_return_if_fail (!window->override_redirect);

  if (window->always_sticky)
    return;

  meta_window_change_workspace_without_transients (window, workspace);

  meta_window_foreach_transient (window, change_workspace_foreach,
                                 workspace);
  meta_window_foreach_ancestor (window, change_workspace_foreach,
                                workspace);
}

static void
window_stick_impl (MetaWindow  *window)
{
  meta_verbose ("Sticking window %s current on_all_workspaces = %d\n",
                window->desc, window->on_all_workspaces);

  if (window->on_all_workspaces_requested)
    return;

  /* We don't change window->workspaces, because we revert
   * to that original workspace list if on_all_workspaces is
   * toggled back off.
   */
  window->on_all_workspaces_requested = TRUE;
  meta_window_update_on_all_workspaces (window);

  meta_window_queue(window, META_QUEUE_CALC_SHOWING);
}

static void
window_unstick_impl (MetaWindow  *window)
{
  if (!window->on_all_workspaces_requested)
    return;

  /* Revert to window->workspaces */

  window->on_all_workspaces_requested = FALSE;
  meta_window_update_on_all_workspaces (window);

  /* We change ourselves to the active workspace, since otherwise you'd get
   * a weird window-vaporization effect. Once we have UI for being
   * on more than one workspace this should probably be add_workspace
   * not change_workspace.
   */
  if (window->screen->active_workspace != window->workspace)
    meta_window_change_workspace (window, window->screen->active_workspace);

  meta_window_queue(window, META_QUEUE_CALC_SHOWING);
}

static gboolean
stick_foreach_func (MetaWindow *window,
                    void       *data)
{
  gboolean stick;

  stick = *(gboolean*)data;
  if (stick)
    window_stick_impl (window);
  else
    window_unstick_impl (window);
  return TRUE;
}

void
meta_window_stick (MetaWindow  *window)
{
  gboolean stick = TRUE;

  g_return_if_fail (!window->override_redirect);

  window_stick_impl (window);
  meta_window_foreach_transient (window,
                                 stick_foreach_func,
                                 &stick);
}

void
meta_window_unstick (MetaWindow  *window)
{
  gboolean stick = FALSE;

  g_return_if_fail (!window->override_redirect);

  window_unstick_impl (window);
  meta_window_foreach_transient (window,
                                 stick_foreach_func,
                                 &stick);
}

unsigned long
meta_window_get_net_wm_desktop (MetaWindow *window)
{
  if (window->on_all_workspaces)
    return 0xFFFFFFFF;
  else
    return meta_workspace_index (window->workspace);
}

static void
update_net_frame_extents (MetaWindow *window)
{
  unsigned long data[4];
  MetaFrameBorders borders;

  meta_frame_calc_borders (window->frame, &borders);
  /* Left */
  data[0] = borders.visible.left;
  /* Right */
  data[1] = borders.visible.right;
  /* Top */
  data[2] = borders.visible.top;
  /* Bottom */
  data[3] = borders.visible.bottom;

  meta_topic (META_DEBUG_GEOMETRY,
              "Setting _NET_FRAME_EXTENTS on managed window 0x%lx "
 "to left = %lu, right = %lu, top = %lu, bottom = %lu\n",
              window->xwindow, data[0], data[1], data[2], data[3]);

  meta_error_trap_push (window->display);
  XChangeProperty (window->display->xdisplay, window->xwindow,
                   window->display->atom__NET_FRAME_EXTENTS,
                   XA_CARDINAL,
                   32, PropModeReplace, (guchar*) data, 4);
  meta_error_trap_pop (window->display);
}

void
meta_window_set_current_workspace_hint (MetaWindow *window)
{
  /* FIXME if on more than one workspace, we claim to be "sticky",
   * the WM spec doesn't say what to do here.
   */
  unsigned long data[1];

  if (window->workspace == NULL)
    {
      /* this happens when unmanaging windows */
      return;
    }

  data[0] = meta_window_get_net_wm_desktop (window);

  meta_verbose ("Setting _NET_WM_DESKTOP of %s to %lu\n",
                window->desc, data[0]);

  meta_error_trap_push (window->display);
  XChangeProperty (window->display->xdisplay, window->xwindow,
                   window->display->atom__NET_WM_DESKTOP,
                   XA_CARDINAL,
                   32, PropModeReplace, (guchar*) data, 1);
  meta_error_trap_pop (window->display);
}

static gboolean
find_root_ancestor (MetaWindow *window,
                    void       *data)
{
  MetaWindow **ancestor = data;

  /* Overwrite the previously "most-root" ancestor with the new one found */
  *ancestor = window;

  /* We want this to continue until meta_window_foreach_ancestor quits because
   * there are no more valid ancestors.
   */
  return TRUE;
}

/**
 * meta_window_find_root_ancestor:
 * @window: a #MetaWindow
 *
 * Follow the chain of parents of @window, skipping transient windows,
 * and return the "root" window which has no non-transient parent.
 *
 * Returns: (transfer none): The root ancestor window
 */
MetaWindow *
meta_window_find_root_ancestor (MetaWindow *window)
{
  MetaWindow *ancestor;
  ancestor = window;
  meta_window_foreach_ancestor (window, find_root_ancestor, &ancestor);
  return ancestor;
}

void
meta_window_raise (MetaWindow  *window)
{
  MetaWindow *ancestor;

  g_return_if_fail (!window->override_redirect);

  ancestor = meta_window_find_root_ancestor (window);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Raising window %s, ancestor of %s\n",
              ancestor->desc, window->desc);

  /* Raise the ancestor of the window (if the window has no ancestor,
   * then ancestor will be set to the window itself); do this because
   * it's weird to see windows from other apps stacked between a child
   * and parent window of the currently active app.  The stacking
   * constraints in stack.c then magically take care of raising all
   * the child windows appropriately.
   */
  if (window->screen->stack == ancestor->screen->stack)
    meta_stack_raise (window->screen->stack, ancestor);
  else
    {
      meta_warning (
                    "Either stacks aren't per screen or some window has a weird "
                    "transient_for hint; window->screen->stack != "
                    "ancestor->screen->stack.  window = %s, ancestor = %s.\n",
                    window->desc, ancestor->desc);
      /* We could raise the window here, but don't want to do that twice and
       * so we let the case below handle that.
       */
    }

  /* Okay, so stacking constraints misses one case: If a window has
   * two children and we want to raise one of those children, then
   * raising the ancestor isn't enough; we need to also raise the
   * correct child.  See bug 307875.
   */
  if (window != ancestor)
    meta_stack_raise (window->screen->stack, window);

  g_signal_emit (window, window_signals[RAISED], 0);
}

void
meta_window_lower (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Lowering window %s\n", window->desc);

  meta_stack_lower (window->screen->stack, window);
}

void
meta_window_send_icccm_message (MetaWindow *window,
                                Atom        atom,
                                guint32     timestamp)
{
  /* This comment and code are from twm, copyright
   * Open Group, Evans & Sutherland, etc.
   */

  /*
   * ICCCM Client Messages - Section 4.2.8 of the ICCCM dictates that all
   * client messages will have the following form:
   *
   *     event type	ClientMessage
   *     message type	_XA_WM_PROTOCOLS
   *     window		tmp->w
   *     format		32
   *     data[0]		message atom
   *     data[1]		time stamp
   */

    XClientMessageEvent ev;

    ev.type = ClientMessage;
    ev.window = window->xwindow;
    ev.message_type = window->display->atom_WM_PROTOCOLS;
    ev.format = 32;
    ev.data.l[0] = atom;
    ev.data.l[1] = timestamp;

    meta_error_trap_push (window->display);
    XSendEvent (window->display->xdisplay,
                window->xwindow, False, 0, (XEvent*) &ev);
    meta_error_trap_pop (window->display);
}

void
meta_window_move_resize_request (MetaWindow *window,
                                 guint       value_mask,
                                 int         gravity,
                                 int         new_x,
                                 int         new_y,
                                 int         new_width,
                                 int         new_height)
{
  int x, y, width, height;
  gboolean allow_position_change;
  gboolean in_grab_op;
  MetaMoveResizeFlags flags;

  /* We ignore configure requests while the user is moving/resizing
   * the window, since these represent the app sucking and fighting
   * the user, most likely due to a bug in the app (e.g. pfaedit
   * seemed to do this)
   *
   * Still have to do the ConfigureNotify and all, but pretend the
   * app asked for the current size/position instead of the new one.
   */
  in_grab_op = FALSE;
  if (window->display->grab_op != META_GRAB_OP_NONE &&
      window == window->display->grab_window)
    {
      switch (window->display->grab_op)
        {
        case META_GRAB_OP_MOVING:
        case META_GRAB_OP_RESIZING_SE:
        case META_GRAB_OP_RESIZING_S:
        case META_GRAB_OP_RESIZING_SW:
        case META_GRAB_OP_RESIZING_N:
        case META_GRAB_OP_RESIZING_NE:
        case META_GRAB_OP_RESIZING_NW:
        case META_GRAB_OP_RESIZING_W:
        case META_GRAB_OP_RESIZING_E:
          in_grab_op = TRUE;
          break;
        default:
          break;
        }
    }

  /* it's essential to use only the explicitly-set fields,
   * and otherwise use our current up-to-date position.
   *
   * Otherwise you get spurious position changes when the app changes
   * size, for example, if window->rect is not in sync with the
   * server-side position in effect when the configure request was
   * generated.
   */
  meta_window_get_gravity_position (window,
                                    gravity,
                                    &x, &y);

  allow_position_change = FALSE;

  if (meta_prefs_get_disable_workarounds ())
    {
      if (window->type == META_WINDOW_DIALOG ||
          window->type == META_WINDOW_MODAL_DIALOG ||
          window->type == META_WINDOW_SPLASHSCREEN)
        ; /* No position change for these */
      else if ((window->size_hints.flags & PPosition) ||
               /* USPosition is just stale if window is placed;
                * no --geometry involved here.
                */
               ((window->size_hints.flags & USPosition) &&
                !window->placed))
        allow_position_change = TRUE;
    }
  else
    {
      allow_position_change = TRUE;
    }

  if (in_grab_op)
    allow_position_change = FALSE;

  if (allow_position_change)
    {
      if (value_mask & CWX)
        x = new_x;
      if (value_mask & CWY)
        y = new_y;
      if (value_mask & (CWX | CWY))
        {
          /* Once manually positioned, windows shouldn't be placed
           * by the window manager.
           */
          window->placed = TRUE;
        }
    }
  else
    {
      meta_topic (META_DEBUG_GEOMETRY,
		  "Not allowing position change for window %s PPosition 0x%lx USPosition 0x%lx type %u\n",
		  window->desc, window->size_hints.flags & PPosition,
		  window->size_hints.flags & USPosition,
		  window->type);
    }

  width = window->rect.width;
  height = window->rect.height;
  if (!in_grab_op)
    {
      if (value_mask & CWWidth)
        width = new_width;

      if (value_mask & CWHeight)
        height = new_height;
    }

  /* ICCCM 4.1.5 */

  /* We're ignoring the value_mask here, since sizes
   * not in the mask will be the current window geometry.
   */
  window->size_hints.x = x;
  window->size_hints.y = y;
  window->size_hints.width = width;
  window->size_hints.height = height;

  /* NOTE: We consider ConfigureRequests to be "user" actions in one
   * way, but not in another.  Explanation of the two cases are in the
   * next two big comments.
   */

  /* The constraints code allows user actions to move windows
   * offscreen, etc., and configure request actions would often send
   * windows offscreen when users don't want it if not constrained
   * (e.g. hitting a dropdown triangle in a fileselector to show more
   * options, which makes the window bigger).  Thus we do not set
   * META_IS_USER_ACTION in flags to the
   * meta_window_move_resize_internal() call.
   */
  flags = META_IS_CONFIGURE_REQUEST;
  if (value_mask & (CWX | CWY))
    flags |= META_IS_MOVE_ACTION;
  if (value_mask & (CWWidth | CWHeight))
    flags |= META_IS_RESIZE_ACTION;

  if (flags & (META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION))
    meta_window_move_resize_internal (window,
                                      flags,
                                      gravity,
                                      x,
                                      y,
                                      width,
                                      height);

  /* window->user_rect exists to allow "snapping-back" the window if a
   * new strut is set (causing the window to move) and then the strut
   * is later removed without the user moving the window in the
   * interim.  We'd like to "snap-back" to the position specified by
   * ConfigureRequest events (at least the constrained version of the
   * ConfigureRequest, since that is guaranteed to be onscreen) so we
   * set user_rect here.
   *
   * See also bug 426519.
   */
  save_user_window_placement (window);
}

gboolean
meta_window_configure_request (MetaWindow *window,
                               XEvent     *event)
{
  /* Note that x, y is the corner of the window border,
   * and width, height is the size of the window inside
   * its border, but that we always deny border requests
   * and give windows a border of 0. But we save the
   * requested border here.
   */
  if (event->xconfigurerequest.value_mask & CWBorderWidth)
    window->border_width = event->xconfigurerequest.border_width;

  meta_window_move_resize_request(window,
                                  event->xconfigurerequest.value_mask,
                                  window->size_hints.win_gravity,
                                  event->xconfigurerequest.x,
                                  event->xconfigurerequest.y,
                                  event->xconfigurerequest.width,
                                  event->xconfigurerequest.height);

  /* Handle stacking. We only handle raises/lowers, mostly because
   * stack.c really can't deal with anything else.  I guess we'll fix
   * that if a client turns up that really requires it. Only a very
   * few clients even require the raise/lower (and in fact all client
   * attempts to deal with stacking order are essentially broken,
   * since they have no idea what other clients are involved or how
   * the stack looks).
   *
   * I'm pretty sure no interesting client uses TopIf, BottomIf, or
   * Opposite anyway, so the only possible missing thing is
   * Above/Below with a sibling set. For now we just pretend there's
   * never a sibling set and always do the full raise/lower instead of
   * the raise-just-above/below-sibling.
   */
  if (event->xconfigurerequest.value_mask & CWStackMode)
    {
      MetaWindow *active_window;
      active_window = window->display->expected_focus_window;
      if (meta_prefs_get_disable_workarounds ())
        {
          meta_topic (META_DEBUG_STACK,
                      "%s sent an xconfigure stacking request; this is "
                      "broken behavior and the request is being ignored.\n",
                      window->desc);
        }
      else if (active_window &&
               !meta_window_same_application (window, active_window) &&
               !meta_window_same_client (window, active_window) &&
               XSERVER_TIME_IS_BEFORE (window->net_wm_user_time,
                                       active_window->net_wm_user_time))
        {
          meta_topic (META_DEBUG_STACK,
                      "Ignoring xconfigure stacking request from %s (with "
                      "user_time %u); currently active application is %s (with "
                      "user_time %u).\n",
                      window->desc,
                      window->net_wm_user_time,
                      active_window->desc,
                      active_window->net_wm_user_time);
          if (event->xconfigurerequest.detail == Above)
            meta_window_set_demands_attention(window);
        }
      else
        {
          switch (event->xconfigurerequest.detail)
            {
            case Above:
              meta_window_raise (window);
              break;
            case Below:
              meta_window_lower (window);
              break;
            case TopIf:
            case BottomIf:
            case Opposite:
              break;
            }
        }
    }

  return TRUE;
}

gboolean
meta_window_property_notify (MetaWindow *window,
                             XEvent     *event)
{
  return process_property_notify (window, &event->xproperty);
}

/*
 * Move window to the requested workspace; append controls whether new WS
 * should be created if one does not exist.
 */
void
meta_window_change_workspace_by_index (MetaWindow *window,
                                       gint        space_index,
                                       gboolean    append,
                                       guint32     timestamp)
{
  MetaWorkspace *workspace;
  MetaScreen    *screen;

  g_return_if_fail (!window->override_redirect);

  if (space_index == -1)
    {
      meta_window_stick (window);
      return;
    }

  screen = window->screen;

  workspace =
    meta_screen_get_workspace_by_index (screen, space_index);

  if (!workspace && append)
    {
      if (timestamp == CurrentTime)
        timestamp = meta_display_get_current_time_roundtrip (window->display);
      workspace = meta_screen_append_new_workspace (screen, FALSE, timestamp);
    }

  if (workspace)
    {
      if (window->on_all_workspaces_requested)
        meta_window_unstick (window);

      meta_window_change_workspace (window, workspace);
    }
}

#define _NET_WM_MOVERESIZE_SIZE_TOPLEFT      0
#define _NET_WM_MOVERESIZE_SIZE_TOP          1
#define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT     2
#define _NET_WM_MOVERESIZE_SIZE_RIGHT        3
#define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT  4
#define _NET_WM_MOVERESIZE_SIZE_BOTTOM       5
#define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT   6
#define _NET_WM_MOVERESIZE_SIZE_LEFT         7
#define _NET_WM_MOVERESIZE_MOVE              8
#define _NET_WM_MOVERESIZE_SIZE_KEYBOARD     9
#define _NET_WM_MOVERESIZE_MOVE_KEYBOARD    10
#define _NET_WM_MOVERESIZE_CANCEL           11

gboolean
meta_window_client_message (MetaWindow *window,
                            XEvent     *event)
{
  MetaDisplay *display;

  display = window->display;

  if (window->override_redirect)
    {
      /* Don't warn here: we could warn on any of the messages below,
       * but we might also receive other client messages that are
       * part of protocols we don't know anything about. So, silently
       * ignoring is simplest.
       */
      return FALSE;
    }

  if (event->xclient.message_type ==
      display->atom__NET_CLOSE_WINDOW)
    {
      guint32 timestamp;

      if (event->xclient.data.l[0] != 0)
	timestamp = event->xclient.data.l[0];
      else
        {
          meta_warning ("Receiving a NET_CLOSE_WINDOW message for %s without "
                        "a timestamp!  This means some buggy (outdated) "
                        "application is on the loose!\n",
                        window->desc);
          timestamp = meta_display_get_current_time (window->display);
        }

      meta_window_delete (window, timestamp);

      return TRUE;
    }
  else if (event->xclient.message_type ==
           display->atom__NET_WM_DESKTOP)
    {
      int space;
      MetaWorkspace *workspace;

      space = event->xclient.data.l[0];

      meta_verbose ("Request to move %s to workspace %d\n",
                    window->desc, space);

      workspace =
        meta_screen_get_workspace_by_index (window->screen,
                                            space);

      if (workspace)
        {
          if (window->on_all_workspaces_requested)
            meta_window_unstick (window);
          meta_window_change_workspace (window, workspace);
        }
      else if (space == (int) 0xFFFFFFFF)
        {
          meta_window_stick (window);
        }
      else
        {
          meta_verbose ("No such workspace %d for screen\n", space);
        }

      meta_verbose ("Window %s now on_all_workspaces = %d\n",
                    window->desc, window->on_all_workspaces);

      return TRUE;
    }
  else if (event->xclient.message_type ==
           display->atom__NET_WM_STATE)
    {
      gulong action;
      Atom first;
      Atom second;

      action = event->xclient.data.l[0];
      first = event->xclient.data.l[1];
      second = event->xclient.data.l[2];

      if (meta_is_verbose ())
        {
          char *str1;
          char *str2;

          meta_error_trap_push_with_return (display);
          str1 = XGetAtomName (display->xdisplay, first);
          if (meta_error_trap_pop_with_return (display) != Success)
            str1 = NULL;

          meta_error_trap_push_with_return (display);
          str2 = XGetAtomName (display->xdisplay, second);
          if (meta_error_trap_pop_with_return (display) != Success)
            str2 = NULL;

          meta_verbose ("Request to change _NET_WM_STATE action %lu atom1: %s atom2: %s\n",
                        action,
                        str1 ? str1 : "(unknown)",
                        str2 ? str2 : "(unknown)");

          meta_XFree (str1);
          meta_XFree (str2);
        }

      if (first == display->atom__NET_WM_STATE_SHADED ||
          second == display->atom__NET_WM_STATE_SHADED)
        {
          gboolean shade;
          guint32 timestamp;

          /* Stupid protocol has no timestamp; of course, shading
           * sucks anyway so who really cares that we're forced to do
           * a roundtrip here?
           */
          timestamp = meta_display_get_current_time_roundtrip (window->display);

          shade = (action == _NET_WM_STATE_ADD ||
                   (action == _NET_WM_STATE_TOGGLE && !window->shaded));
          if (shade && window->has_shade_func)
            meta_window_shade (window, timestamp);
          else
            meta_window_unshade (window, timestamp);
        }

      if (first == display->atom__NET_WM_STATE_FULLSCREEN ||
          second == display->atom__NET_WM_STATE_FULLSCREEN)
        {
          gboolean make_fullscreen;

          make_fullscreen = (action == _NET_WM_STATE_ADD ||
                             (action == _NET_WM_STATE_TOGGLE && !window->fullscreen));
          if (make_fullscreen && window->has_fullscreen_func)
            meta_window_make_fullscreen (window);
          else
            meta_window_unmake_fullscreen (window);
        }

      if (first == display->atom__NET_WM_STATE_MAXIMIZED_HORZ ||
          second == display->atom__NET_WM_STATE_MAXIMIZED_HORZ)
        {
          gboolean max;

          max = (action == _NET_WM_STATE_ADD ||
                 (action == _NET_WM_STATE_TOGGLE &&
                  !window->maximized_horizontally));
          if (max && window->has_maximize_func)
            {
              if (meta_prefs_get_raise_on_click ())
                meta_window_raise (window);
              meta_window_maximize (window, META_MAXIMIZE_HORIZONTAL);
            }
          else
            {
              if (meta_prefs_get_raise_on_click ())
                meta_window_raise (window);
              meta_window_unmaximize (window, META_MAXIMIZE_HORIZONTAL);
            }
        }

      if (first == display->atom__NET_WM_STATE_MAXIMIZED_VERT ||
          second == display->atom__NET_WM_STATE_MAXIMIZED_VERT)
        {
          gboolean max;

          max = (action == _NET_WM_STATE_ADD ||
                 (action == _NET_WM_STATE_TOGGLE &&
                  !window->maximized_vertically));
          if (max && window->has_maximize_func)
            {
              if (meta_prefs_get_raise_on_click ())
                meta_window_raise (window);
              meta_window_maximize (window, META_MAXIMIZE_VERTICAL);
            }
          else
            {
              if (meta_prefs_get_raise_on_click ())
                meta_window_raise (window);
              meta_window_unmaximize (window, META_MAXIMIZE_VERTICAL);
            }
        }

      if (first == display->atom__NET_WM_STATE_MODAL ||
          second == display->atom__NET_WM_STATE_MODAL)
        {
          window->wm_state_modal =
            (action == _NET_WM_STATE_ADD) ||
            (action == _NET_WM_STATE_TOGGLE && !window->wm_state_modal);

          recalc_window_type (window);
          meta_window_queue(window, META_QUEUE_MOVE_RESIZE);
        }

      if (first == display->atom__NET_WM_STATE_SKIP_PAGER ||
          second == display->atom__NET_WM_STATE_SKIP_PAGER)
        {
          window->wm_state_skip_pager =
            (action == _NET_WM_STATE_ADD) ||
            (action == _NET_WM_STATE_TOGGLE && !window->skip_pager);

          recalc_window_features (window);
          set_net_wm_state (window);
        }

      if (first == display->atom__NET_WM_STATE_SKIP_TASKBAR ||
          second == display->atom__NET_WM_STATE_SKIP_TASKBAR)
        {
          window->wm_state_skip_taskbar =
            (action == _NET_WM_STATE_ADD) ||
            (action == _NET_WM_STATE_TOGGLE && !window->skip_taskbar);

          recalc_window_features (window);
          set_net_wm_state (window);
        }

      if (first == display->atom__NET_WM_STATE_ABOVE ||
          second == display->atom__NET_WM_STATE_ABOVE)
        {
          meta_window_set_above(window,
            (action == _NET_WM_STATE_ADD) ||
            (action == _NET_WM_STATE_TOGGLE && !window->wm_state_above));
        }

      if (first == display->atom__NET_WM_STATE_BELOW ||
          second == display->atom__NET_WM_STATE_BELOW)
        {
          window->wm_state_below =
            (action == _NET_WM_STATE_ADD) ||
            (action == _NET_WM_STATE_TOGGLE && !window->wm_state_below);

          meta_window_update_layer (window);
          set_net_wm_state (window);
        }

      if (first == display->atom__NET_WM_STATE_DEMANDS_ATTENTION ||
          second == display->atom__NET_WM_STATE_DEMANDS_ATTENTION)
        {
          if ((action == _NET_WM_STATE_ADD) ||
              (action == _NET_WM_STATE_TOGGLE && !window->wm_state_demands_attention))
            meta_window_set_demands_attention (window);
          else
            meta_window_unset_demands_attention (window);
        }

       if (first == display->atom__NET_WM_STATE_STICKY ||
          second == display->atom__NET_WM_STATE_STICKY)
        {
          if ((action == _NET_WM_STATE_ADD) ||
              (action == _NET_WM_STATE_TOGGLE && !window->on_all_workspaces_requested))
            meta_window_stick (window);
          else
            meta_window_unstick (window);
        }

      return TRUE;
    }
  else if (event->xclient.message_type ==
           display->atom_WM_CHANGE_STATE)
    {
      meta_verbose ("WM_CHANGE_STATE client message, state: %ld\n",
                    event->xclient.data.l[0]);
      if (event->xclient.data.l[0] == IconicState &&
          window->has_minimize_func)
        meta_window_minimize (window);

      return TRUE;
    }
  else if (event->xclient.message_type ==
           display->atom__NET_WM_MOVERESIZE)
    {
      int x_root;
      int y_root;
      int action;
      MetaGrabOp op;
      int button;
      guint32 timestamp;

      /* _NET_WM_MOVERESIZE messages are almost certainly going to come from
       * clients when users click on the fake "frame" that the client has,
       * thus we should also treat such messages as though it were a
       * "frame action".
       */
      gboolean const frame_action = TRUE;

      x_root = event->xclient.data.l[0];
      y_root = event->xclient.data.l[1];
      action = event->xclient.data.l[2];
      button = event->xclient.data.l[3];

      /* FIXME: What a braindead protocol; no timestamp?!? */
      timestamp = meta_display_get_current_time_roundtrip (display);
      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Received _NET_WM_MOVERESIZE message on %s, %d,%d action = %d, button %d\n",
                  window->desc,
                  x_root, y_root, action, button);

      op = META_GRAB_OP_NONE;
      switch (action)
        {
        case _NET_WM_MOVERESIZE_SIZE_TOPLEFT:
          op = META_GRAB_OP_RESIZING_NW;
          break;
        case _NET_WM_MOVERESIZE_SIZE_TOP:
          op = META_GRAB_OP_RESIZING_N;
          break;
        case _NET_WM_MOVERESIZE_SIZE_TOPRIGHT:
          op = META_GRAB_OP_RESIZING_NE;
          break;
        case _NET_WM_MOVERESIZE_SIZE_RIGHT:
          op = META_GRAB_OP_RESIZING_E;
          break;
        case _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT:
          op = META_GRAB_OP_RESIZING_SE;
          break;
        case _NET_WM_MOVERESIZE_SIZE_BOTTOM:
          op = META_GRAB_OP_RESIZING_S;
          break;
        case _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT:
          op = META_GRAB_OP_RESIZING_SW;
          break;
        case _NET_WM_MOVERESIZE_SIZE_LEFT:
          op = META_GRAB_OP_RESIZING_W;
          break;
        case _NET_WM_MOVERESIZE_MOVE:
          op = META_GRAB_OP_MOVING;
          break;
        case _NET_WM_MOVERESIZE_SIZE_KEYBOARD:
          op = META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN;
          break;
        case _NET_WM_MOVERESIZE_MOVE_KEYBOARD:
          op = META_GRAB_OP_KEYBOARD_MOVING;
          break;
        case _NET_WM_MOVERESIZE_CANCEL:
          /* handled below */
          break;
        default:
          break;
        }

      if (action == _NET_WM_MOVERESIZE_CANCEL)
        {
          meta_display_end_grab_op (window->display, timestamp);
        }
      else if (op != META_GRAB_OP_NONE &&
          ((window->has_move_func && op == META_GRAB_OP_KEYBOARD_MOVING) ||
           (window->has_resize_func && op == META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN)))
        {
          meta_window_begin_grab_op (window, op, frame_action, timestamp);
        }
      else if (op != META_GRAB_OP_NONE &&
               ((window->has_move_func && op == META_GRAB_OP_MOVING) ||
               (window->has_resize_func &&
                (op != META_GRAB_OP_MOVING &&
                 op != META_GRAB_OP_KEYBOARD_MOVING))))
        {
          /*
           * the button SHOULD already be included in the message
           */
          if (button == 0)
            {
              int x, y, query_root_x, query_root_y;
              Window root, child;
              guint mask;

              /* The race conditions in this _NET_WM_MOVERESIZE thing
               * are mind-boggling
               */
              mask = 0;
              meta_error_trap_push (window->display);
              XQueryPointer (window->display->xdisplay,
                             window->xwindow,
                             &root, &child,
                             &query_root_x, &query_root_y,
                             &x, &y,
                             &mask);
              meta_error_trap_pop (window->display);

              if (mask & Button1Mask)
                button = 1;
              else if (mask & Button2Mask)
                button = 2;
              else if (mask & Button3Mask)
                button = 3;
              else
                button = 0;
            }

          if (button != 0)
            {
              meta_topic (META_DEBUG_WINDOW_OPS,
                          "Beginning move/resize with button = %d\n", button);
              meta_display_begin_grab_op (window->display,
                                          window->screen,
                                          window,
                                          op,
                                          FALSE,
                                          frame_action,
                                          button, 0,
                                          timestamp,
                                          x_root,
                                          y_root);
            }
        }

      return TRUE;
    }
  else if (event->xclient.message_type ==
           display->atom__NET_MOVERESIZE_WINDOW)
    {
      int gravity;
      guint value_mask;

      gravity = (event->xclient.data.l[0] & 0xff);
      value_mask = (event->xclient.data.l[0] & 0xf00) >> 8;
      /* source = (event->xclient.data.l[0] & 0xf000) >> 12; */

      if (gravity == 0)
        gravity = window->size_hints.win_gravity;

      meta_window_move_resize_request(window,
                                      value_mask,
                                      gravity,
                                      event->xclient.data.l[1],  /* x */
                                      event->xclient.data.l[2],  /* y */
                                      event->xclient.data.l[3],  /* width */
                                      event->xclient.data.l[4]); /* height */
    }
  else if (event->xclient.message_type ==
           display->atom__NET_ACTIVE_WINDOW)
    {
      MetaClientType source_indication;
      guint32        timestamp;

      meta_verbose ("_NET_ACTIVE_WINDOW request for window '%s', activating\n",
                    window->desc);

      source_indication = event->xclient.data.l[0];
      timestamp = event->xclient.data.l[1];

      if (source_indication > META_CLIENT_TYPE_MAX_RECOGNIZED)
        source_indication = META_CLIENT_TYPE_UNKNOWN;

      if (timestamp == 0)
        {
          /* Client using older EWMH _NET_ACTIVE_WINDOW without a timestamp */
          meta_warning ("Buggy client sent a _NET_ACTIVE_WINDOW message with a "
                        "timestamp of 0 for %s\n",
                        window->desc);
          timestamp = meta_display_get_current_time (display);
        }

      window_activate (window, timestamp, source_indication, NULL);
      return TRUE;
    }
  else if (event->xclient.message_type ==
           display->atom__NET_WM_FULLSCREEN_MONITORS)
    {
      gulong top, bottom, left, right;

      meta_verbose ("_NET_WM_FULLSCREEN_MONITORS request for window '%s'\n",
                    window->desc);

      top = event->xclient.data.l[0];
      bottom = event->xclient.data.l[1];
      left = event->xclient.data.l[2];
      right = event->xclient.data.l[3];
      /* source_indication = event->xclient.data.l[4]; */

      meta_window_update_fullscreen_monitors (window, top, bottom, left, right);
    }

  return FALSE;
}

static void
meta_window_appears_focused_changed (MetaWindow *window)
{
  set_net_wm_state (window);

  g_object_notify (G_OBJECT (window), "appears-focused");

  if (window->frame)
    meta_frame_queue_draw (window->frame);
}

/**
 * meta_window_propagate_focus_appearance:
 * @window: the window to start propagating from
 * @focused: %TRUE if @window's ancestors should appear focused,
 *   %FALSE if they should not.
 *
 * Adjusts the value of #MetaWindow:appears-focused on @window's
 * ancestors (but not @window itself). If @focused is %TRUE, each of
 * @window's ancestors will have its %attached_focus_window field set
 * to the current %focus_window. If @focused if %FALSE, each of
 * @window's ancestors will have its %attached_focus_window field
 * cleared if it is currently %focus_window.
 */
void
meta_window_propagate_focus_appearance (MetaWindow *window,
                                        gboolean    focused)
{
  MetaWindow *child, *parent, *focus_window;

  focus_window = window->display->focus_window;

  child = window;
  parent = meta_window_get_transient_for (child);
  while (parent && (!focused || meta_window_is_attached_dialog (child)))
    {
      gboolean child_focus_state_changed;

      if (focused)
        {
          if (parent->attached_focus_window == focus_window)
            break;
          child_focus_state_changed = (parent->attached_focus_window == NULL);
          parent->attached_focus_window = focus_window;
        }
      else
        {
          if (parent->attached_focus_window != focus_window)
            break;
          child_focus_state_changed = (parent->attached_focus_window != NULL);
          parent->attached_focus_window = NULL;
        }

      if (child_focus_state_changed && !parent->has_focus &&
          parent != window->display->expected_focus_window)
        {
          meta_window_appears_focused_changed (parent);
        }

      child = parent;
      parent = meta_window_get_transient_for (child);
    }
}

void
meta_window_lost_focus (MetaWindow *window)
{
  if (window == window->display->focus_window)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "%s is now the previous focus window due to being focused out or unmapped\n",
                  window->desc);

      meta_topic (META_DEBUG_FOCUS,
                  "* Focus --> NULL (was %s)\n", window->desc);

      meta_window_propagate_focus_appearance (window, FALSE);

      window->display->focus_window = NULL;
      g_object_notify (G_OBJECT (window->display), "focus-window");
      window->has_focus = FALSE;

      if (!window->attached_focus_window)
        meta_window_appears_focused_changed (window);

      meta_error_trap_push (window->display);
      XUninstallColormap (window->display->xdisplay,
                          window->colormap);
      meta_error_trap_pop (window->display);

      /* move out of FOCUSED_WINDOW layer */
      meta_window_update_layer (window);

      /* Re-grab for click to focus and raise-on-click, if necessary */
      if (meta_prefs_get_focus_mode () == G_DESKTOP_FOCUS_MODE_CLICK ||
          !meta_prefs_get_raise_on_click ())
        meta_display_grab_focus_window_button (window->display, window);
    }
}

gboolean
meta_window_notify_focus (MetaWindow   *window,
                          XIEnterEvent *event)
{
  /* note the event can be on either the window or the frame,
   * we focus the frame for shaded windows
   */

  /* The event can be FocusIn, FocusOut, or UnmapNotify.
   * On UnmapNotify we have to pretend it's focus out,
   * because we won't get a focus out if it occurs, apparently.
   */

  /* We ignore grabs, though this is questionable.
   * It may be better to increase the intelligence of
   * the focus window tracking.
   *
   * The problem is that keybindings for windows are done with
   * XGrabKey, which means focus_window disappears and the front of
   * the MRU list gets confused from what the user expects once a
   * keybinding is used.
   */
  meta_topic (META_DEBUG_FOCUS,
              "Focus %s event received on %s 0x%lx (%s) "
              "mode %s detail %s\n",
              event->evtype == XI_FocusIn ? "in" :
              event->evtype == XI_FocusOut ? "out" :
              "???",
              window->desc, event->event,
              event->event == window->xwindow ?
              "client window" :
              (window->frame && event->event == window->frame->xwindow) ?
              "frame window" :
              "unknown window",
              meta_event_mode_to_string (event->mode),
              meta_event_detail_to_string (event->detail));

  /* FIXME our pointer tracking is broken; see how
   * gtk+/gdk/x11/gdkevents-x11.c or XFree86/xc/programs/xterm/misc.c
   * handle it for the correct way.  In brief you need to track
   * pointer focus and regular focus, and handle EnterNotify in
   * PointerRoot mode with no window manager.  However as noted above,
   * accurate focus tracking will break things because we want to keep
   * windows "focused" when using keybindings on them, and also we
   * sometimes "focus" a window by focusing its frame or
   * no_focus_window; so this all needs rethinking massively.
   *
   * My suggestion is to change it so that we clearly separate
   * actual keyboard focus tracking using the xterm algorithm,
   * and mutter's "pretend" focus window, and go through all
   * the code and decide which one should be used in each place;
   * a hard bit is deciding on a policy for that.
   *
   * http://bugzilla.gnome.org/show_bug.cgi?id=90382
   */

  if ((event->evtype == XI_FocusIn ||
       event->evtype == XI_FocusOut) &&
      (event->mode == NotifyGrab ||
       event->mode == NotifyUngrab ||
       /* From WindowMaker, ignore all funky pointer root events */
       event->detail > NotifyNonlinearVirtual))
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Ignoring focus event generated by a grab or other weirdness\n");
      return TRUE;
    }

  if (event->evtype == XI_FocusIn)
    {
      if (window->override_redirect)
        {
          window->display->focus_window = NULL;
          g_object_notify (G_OBJECT (window->display), "focus-window");
          return FALSE;
        }

      if (window != window->display->focus_window)
        {
          meta_topic (META_DEBUG_FOCUS,
                      "* Focus --> %s\n", window->desc);
          window->display->focus_window = window;
          window->has_focus = TRUE;

          /* Move to the front of the focusing workspace's MRU list.
           * We should only be "removing" it from the MRU list if it's
           * not already there.  Note that it's possible that we might
           * be processing this FocusIn after we've changed to a
           * different workspace; we should therefore update the MRU
           * list only if the window is actually on the active
           * workspace.
           */
          if (window->screen->active_workspace &&
              meta_window_located_on_workspace (window,
                                                window->screen->active_workspace))
            {
              GList* link;
              link = g_list_find (window->screen->active_workspace->mru_list,
                                  window);
              g_assert (link);

              window->screen->active_workspace->mru_list =
                g_list_remove_link (window->screen->active_workspace->mru_list,
                                    link);
              g_list_free (link);

              window->screen->active_workspace->mru_list =
                g_list_prepend (window->screen->active_workspace->mru_list,
                                window);
            }

          if (window->frame)
            meta_frame_queue_draw (window->frame);

          meta_error_trap_push (window->display);
          XInstallColormap (window->display->xdisplay,
                            window->colormap);
          meta_error_trap_pop (window->display);

          /* move into FOCUSED_WINDOW layer */
          meta_window_update_layer (window);

          /* Ungrab click to focus button since the sync grab can interfere
           * with some things you might do inside the focused window, by
           * causing the client to get funky enter/leave events.
           *
           * The reason we usually have a passive grab on the window is
           * so that we can intercept clicks and raise the window in
           * response. For click-to-focus we don't need that since the
           * focused window is already raised. When raise_on_click is
           * FALSE we also don't need that since we don't do anything
           * when the window is clicked.
           *
           * There is dicussion in bugs 102209, 115072, and 461577
           */
          if (meta_prefs_get_focus_mode () == G_DESKTOP_FOCUS_MODE_CLICK ||
              !meta_prefs_get_raise_on_click())
            meta_display_ungrab_focus_window_button (window->display, window);

          g_signal_emit (window, window_signals[FOCUS], 0);
          g_object_notify (G_OBJECT (window->display), "focus-window");

          if (!window->attached_focus_window)
            meta_window_appears_focused_changed (window);

          meta_window_propagate_focus_appearance (window, TRUE);
        }
    }
  else if (event->evtype == XI_FocusOut)
    {
      if (event->detail == NotifyInferior)
        {
          /* This event means the client moved focus to a subwindow */
          meta_topic (META_DEBUG_FOCUS,
                      "Ignoring focus out on %s with NotifyInferior\n",
                      window->desc);
          return TRUE;
        }
      else
        {
          meta_window_lost_focus (window);
        }
    }

  /* Now set _NET_ACTIVE_WINDOW hint */
  meta_display_update_active_window_hint (window->display);

  return FALSE;
}

static gboolean
process_property_notify (MetaWindow     *window,
                         XPropertyEvent *event)
{
  Window xid = window->xwindow;

  if (meta_is_verbose ()) /* avoid looking up the name if we don't have to */
    {
      char *property_name = XGetAtomName (window->display->xdisplay,
                                          event->atom);

      meta_verbose ("Property notify on %s for %s\n",
                    window->desc, property_name);
      XFree (property_name);
    }

  if (event->atom == window->display->atom__NET_WM_USER_TIME &&
      window->user_time_window)
    {
        xid = window->user_time_window;
    }

  meta_window_reload_property_from_xwindow (window, xid, event->atom, FALSE);

  return TRUE;
}

static void
send_configure_notify (MetaWindow *window)
{
  XEvent event;

  /* from twm */

  event.type = ConfigureNotify;
  event.xconfigure.display = window->display->xdisplay;
  event.xconfigure.event = window->xwindow;
  event.xconfigure.window = window->xwindow;
  event.xconfigure.x = window->rect.x - window->border_width;
  event.xconfigure.y = window->rect.y - window->border_width;
  if (window->frame)
    {
      if (window->withdrawn)
        {
          MetaFrameBorders borders;
          /* We reparent the client window and put it to the position
           * where the visible top-left of the frame window currently is.
           */

          meta_frame_calc_borders (window->frame, &borders);

          event.xconfigure.x = window->frame->rect.x + borders.invisible.left;
          event.xconfigure.y = window->frame->rect.y + borders.invisible.top;
        }
      else
        {
          /* Need to be in root window coordinates */
          event.xconfigure.x += window->frame->rect.x;
          event.xconfigure.y += window->frame->rect.y;
        }
    }
  event.xconfigure.width = window->rect.width;
  event.xconfigure.height = window->rect.height;
  event.xconfigure.border_width = window->border_width; /* requested not actual */
  event.xconfigure.above = None; /* FIXME */
  event.xconfigure.override_redirect = False;

  meta_topic (META_DEBUG_GEOMETRY,
              "Sending synthetic configure notify to %s with x: %d y: %d w: %d h: %d\n",
              window->desc,
              event.xconfigure.x, event.xconfigure.y,
              event.xconfigure.width, event.xconfigure.height);

  meta_error_trap_push (window->display);
  XSendEvent (window->display->xdisplay,
              window->xwindow,
              False, StructureNotifyMask, &event);
  meta_error_trap_pop (window->display);
}

/* FIXME: @rect should be marked (out), but gjs doesn't currently support
 * this. See also http://bugzilla.gnome.org/show_bug.cgi?id=573314
 */
/**
 * meta_window_get_icon_geometry:
 * @window: a #MetaWindow
 * @rect: rectangle into which to store the returned geometry.
 *
 * Gets the location of the icon corresponding to the window. The location
 * will be provided set by the task bar or other user interface element
 * displaying the icon, and is relative to the root window. This currently
 * retrieves the icon geometry from the X server as a round trip on every
 * call.
 *
 * Return value: %TRUE if the icon geometry was succesfully retrieved.
 */
gboolean
meta_window_get_icon_geometry (MetaWindow    *window,
                               MetaRectangle *rect)
{
  gulong *geometry = NULL;
  int nitems;

  g_return_val_if_fail (!window->override_redirect, FALSE);

  if (meta_prop_get_cardinal_list (window->display,
                                   window->xwindow,
                                   window->display->atom__NET_WM_ICON_GEOMETRY,
                                   &geometry, &nitems))
    {
      if (nitems != 4)
        {
          meta_verbose ("_NET_WM_ICON_GEOMETRY on %s has %d values instead of 4\n",
                        window->desc, nitems);
          meta_XFree (geometry);
          return FALSE;
        }

      if (rect)
        {
          rect->x = geometry[0];
          rect->y = geometry[1];
          rect->width = geometry[2];
          rect->height = geometry[3];
        }

      meta_XFree (geometry);

      return TRUE;
    }

  return FALSE;
}

static Window
read_client_leader (MetaDisplay *display,
                    Window       xwindow)
{
  Window retval = None;

  meta_prop_get_window (display, xwindow,
                        display->atom_WM_CLIENT_LEADER,
                        &retval);

  return retval;
}

typedef struct
{
  Window leader;
} ClientLeaderData;

static gboolean
find_client_leader_func (MetaWindow *ancestor,
                         void       *data)
{
  ClientLeaderData *d;

  d = data;

  d->leader = read_client_leader (ancestor->display,
                                  ancestor->xwindow);

  /* keep going if no client leader found */
  return d->leader == None;
}

static void
update_sm_hints (MetaWindow *window)
{
  Window leader;

  window->xclient_leader = None;
  window->sm_client_id = NULL;

  /* If not on the current window, we can get the client
   * leader from transient parents. If we find a client
   * leader, we read the SM_CLIENT_ID from it.
   */
  leader = read_client_leader (window->display, window->xwindow);
  if (leader == None)
    {
      ClientLeaderData d;
      d.leader = None;
      meta_window_foreach_ancestor (window, find_client_leader_func,
                                    &d);
      leader = d.leader;
    }

  if (leader != None)
    {
      char *str;

      window->xclient_leader = leader;

      if (meta_prop_get_latin1_string (window->display, leader,
                                       window->display->atom_SM_CLIENT_ID,
                                       &str))
        {
          window->sm_client_id = g_strdup (str);
          meta_XFree (str);
        }
    }
  else
    {
      meta_verbose ("Didn't find a client leader for %s\n", window->desc);

      if (!meta_prefs_get_disable_workarounds ())
        {
          /* Some broken apps (kdelibs fault?) set SM_CLIENT_ID on the app
           * instead of the client leader
           */
          char *str;

          str = NULL;
          if (meta_prop_get_latin1_string (window->display, window->xwindow,
                                           window->display->atom_SM_CLIENT_ID,
                                           &str))
            {
              if (window->sm_client_id == NULL) /* first time through */
                meta_warning (_("Window %s sets SM_CLIENT_ID on itself, instead of on the WM_CLIENT_LEADER window as specified in the ICCCM.\n"),
                              window->desc);

              window->sm_client_id = g_strdup (str);
              meta_XFree (str);
            }
        }
    }

  meta_verbose ("Window %s client leader: 0x%lx SM_CLIENT_ID: '%s'\n",
                window->desc, window->xclient_leader,
                window->sm_client_id ? window->sm_client_id : "none");
}

void
meta_window_update_role (MetaWindow *window)
{
  char *str;

  g_return_if_fail (!window->override_redirect);

  if (window->role)
    g_free (window->role);
  window->role = NULL;

  if (meta_prop_get_latin1_string (window->display, window->xwindow,
                                   window->display->atom_WM_WINDOW_ROLE,
                                   &str))
    {
      window->role = g_strdup (str);
      meta_XFree (str);
    }

  meta_verbose ("Updated role of %s to '%s'\n",
                window->desc, window->role ? window->role : "null");
}

void
meta_window_update_net_wm_type (MetaWindow *window)
{
  int n_atoms;
  Atom *atoms;
  int i;

  window->type_atom = None;
  n_atoms = 0;
  atoms = NULL;

  meta_prop_get_atom_list (window->display, window->xwindow,
                           window->display->atom__NET_WM_WINDOW_TYPE,
                           &atoms, &n_atoms);

  i = 0;
  while (i < n_atoms)
    {
      /* We break as soon as we find one we recognize,
       * supposed to prefer those near the front of the list
       */
      if (atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_DESKTOP ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_DOCK ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_TOOLBAR ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_MENU ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_UTILITY ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_SPLASH ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_DIALOG ||
          atoms[i] ==
	    window->display->atom__NET_WM_WINDOW_TYPE_DROPDOWN_MENU ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_POPUP_MENU ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_TOOLTIP ||
          atoms[i] ==
	    window->display->atom__NET_WM_WINDOW_TYPE_NOTIFICATION ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_COMBO ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_DND ||
          atoms[i] == window->display->atom__NET_WM_WINDOW_TYPE_NORMAL)
        {
          window->type_atom = atoms[i];
          break;
        }

      ++i;
    }

  meta_XFree (atoms);

  if (meta_is_verbose ())
    {
      char *str;

      str = NULL;
      if (window->type_atom != None)
        {
          meta_error_trap_push (window->display);
          str = XGetAtomName (window->display->xdisplay, window->type_atom);
          meta_error_trap_pop (window->display);
        }

      meta_verbose ("Window %s type atom %s\n", window->desc,
                    str ? str : "(none)");

      if (str)
        meta_XFree (str);
    }

  meta_window_recalc_window_type (window);
}

static void
redraw_icon (MetaWindow *window)
{
  /* We could probably be smart and just redraw the icon here,
   * instead of the whole frame.
   */
  if (window->frame && (window->mapped || window->frame->mapped))
    meta_ui_queue_frame_draw (window->screen->ui, window->frame->xwindow);
}

void
meta_window_update_icon_now (MetaWindow *window)
{
  GdkPixbuf *icon;
  GdkPixbuf *mini_icon;

  g_return_if_fail (!window->override_redirect);

  icon = NULL;
  mini_icon = NULL;

  if (meta_read_icons (window->screen,
                       window->xwindow,
                       &window->icon_cache,
                       window->wm_hints_pixmap,
                       window->wm_hints_mask,
                       &icon,
                       META_ICON_WIDTH, META_ICON_HEIGHT,
                       &mini_icon,
                       META_MINI_ICON_WIDTH,
                       META_MINI_ICON_HEIGHT))
    {
      if (window->icon)
        g_object_unref (G_OBJECT (window->icon));

      if (window->mini_icon)
        g_object_unref (G_OBJECT (window->mini_icon));

      window->icon = icon;
      window->mini_icon = mini_icon;

      g_object_freeze_notify (G_OBJECT (window));
      g_object_notify (G_OBJECT (window), "icon");
      g_object_notify (G_OBJECT (window), "mini-icon");
      g_object_thaw_notify (G_OBJECT (window));

      redraw_icon (window);
    }

  g_assert (window->icon);
  g_assert (window->mini_icon);
}

static gboolean
idle_update_icon (gpointer data)
{
  GSList *tmp;
  GSList *copy;
  guint queue_index = GPOINTER_TO_INT (data);

  meta_topic (META_DEBUG_GEOMETRY, "Clearing the update_icon queue\n");

  /* Work with a copy, for reentrancy. The allowed reentrancy isn't
   * complete; destroying a window while we're in here would result in
   * badness. But it's OK to queue/unqueue update_icons.
   */
  copy = g_slist_copy (queue_pending[queue_index]);
  g_slist_free (queue_pending[queue_index]);
  queue_pending[queue_index] = NULL;
  queue_later[queue_index] = 0;

  destroying_windows_disallowed += 1;

  tmp = copy;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      meta_window_update_icon_now (window);
      window->is_in_queues &= ~META_QUEUE_UPDATE_ICON;

      tmp = tmp->next;
    }

  g_slist_free (copy);

  destroying_windows_disallowed -= 1;

  return FALSE;
}

GList*
meta_window_get_workspaces (MetaWindow *window)
{
  if (window->on_all_workspaces)
    return window->screen->workspaces;
  else if (window->workspace != NULL)
    return window->workspace->list_containing_self;
  else
    return NULL;
}

static void
invalidate_work_areas (MetaWindow *window)
{
  GList *tmp;

  tmp = meta_window_get_workspaces (window);

  while (tmp != NULL)
    {
      meta_workspace_invalidate_work_area (tmp->data);
      tmp = tmp->next;
    }
}

void
meta_window_update_struts (MetaWindow *window)
{
  GSList *old_struts;
  GSList *new_struts;
  GSList *old_iter, *new_iter;
  gulong *struts = NULL;
  int nitems;
  gboolean changed;

  g_return_if_fail (!window->override_redirect);

  meta_verbose ("Updating struts for %s\n", window->desc);

  old_struts = window->struts;
  new_struts = NULL;

  if (meta_prop_get_cardinal_list (window->display,
                                   window->xwindow,
                                   window->display->atom__NET_WM_STRUT_PARTIAL,
                                   &struts, &nitems))
    {
      if (nitems != 12)
        meta_verbose ("_NET_WM_STRUT_PARTIAL on %s has %d values instead "
                      "of 12\n",
                      window->desc, nitems);
      else
        {
          /* Pull out the strut info for each side in the hint */
          int i;
          for (i=0; i<4; i++)
            {
              MetaStrut *temp;
              int thickness, strut_begin, strut_end;

              thickness = struts[i];
              if (thickness == 0)
                continue;
              strut_begin = struts[4+(i*2)];
              strut_end   = struts[4+(i*2)+1];

              temp = g_new (MetaStrut, 1);
              temp->side = 1 << i; /* See MetaSide def.  Matches nicely, eh? */
              temp->rect = window->screen->rect;
              switch (temp->side)
                {
                case META_SIDE_RIGHT:
                  temp->rect.x = BOX_RIGHT(temp->rect) - thickness;
                  /* Intentionally fall through without breaking */
                case META_SIDE_LEFT:
                  temp->rect.width  = thickness;
                  temp->rect.y      = strut_begin;
                  temp->rect.height = strut_end - strut_begin + 1;
                  break;
                case META_SIDE_BOTTOM:
                  temp->rect.y = BOX_BOTTOM(temp->rect) - thickness;
                  /* Intentionally fall through without breaking */
                case META_SIDE_TOP:
                  temp->rect.height = thickness;
                  temp->rect.x      = strut_begin;
                  temp->rect.width  = strut_end - strut_begin + 1;
                  break;
                default:
                  g_assert_not_reached ();
                }

              new_struts = g_slist_prepend (new_struts, temp);
            }

          meta_verbose ("_NET_WM_STRUT_PARTIAL struts %lu %lu %lu %lu for "
                        "window %s\n",
                        struts[0], struts[1], struts[2], struts[3],
                        window->desc);
        }
      meta_XFree (struts);
    }
  else
    {
      meta_verbose ("No _NET_WM_STRUT property for %s\n",
                    window->desc);
    }

  if (!new_struts &&
      meta_prop_get_cardinal_list (window->display,
                                   window->xwindow,
                                   window->display->atom__NET_WM_STRUT,
                                   &struts, &nitems))
    {
      if (nitems != 4)
        meta_verbose ("_NET_WM_STRUT on %s has %d values instead of 4\n",
                      window->desc, nitems);
      else
        {
          /* Pull out the strut info for each side in the hint */
          int i;
          for (i=0; i<4; i++)
            {
              MetaStrut *temp;
              int thickness;

              thickness = struts[i];
              if (thickness == 0)
                continue;

              temp = g_new (MetaStrut, 1);
              temp->side = 1 << i;
              temp->rect = window->screen->rect;
              switch (temp->side)
                {
                case META_SIDE_RIGHT:
                  temp->rect.x = BOX_RIGHT(temp->rect) - thickness;
                  /* Intentionally fall through without breaking */
                case META_SIDE_LEFT:
                  temp->rect.width  = thickness;
                  break;
                case META_SIDE_BOTTOM:
                  temp->rect.y = BOX_BOTTOM(temp->rect) - thickness;
                  /* Intentionally fall through without breaking */
                case META_SIDE_TOP:
                  temp->rect.height = thickness;
                  break;
                default:
                  g_assert_not_reached ();
                }

              new_struts = g_slist_prepend (new_struts, temp);
            }

          meta_verbose ("_NET_WM_STRUT struts %lu %lu %lu %lu for window %s\n",
                        struts[0], struts[1], struts[2], struts[3],
                        window->desc);
        }
      meta_XFree (struts);
    }
  else if (!new_struts)
    {
      meta_verbose ("No _NET_WM_STRUT property for %s\n",
                    window->desc);
    }

  /* Determine whether old_struts and new_struts are the same */
  old_iter = old_struts;
  new_iter = new_struts;
  while (old_iter && new_iter)
    {
      MetaStrut *old_strut = (MetaStrut*) old_iter->data;
      MetaStrut *new_strut = (MetaStrut*) new_iter->data;

      if (old_strut->side != new_strut->side ||
          !meta_rectangle_equal (&old_strut->rect, &new_strut->rect))
        break;

      old_iter = old_iter->next;
      new_iter = new_iter->next;
    }
  changed = (old_iter != NULL || new_iter != NULL);

  /* Update appropriately */
  meta_free_gslist_and_elements (old_struts);
  window->struts = new_struts;
  if (changed)
    {
      meta_topic (META_DEBUG_WORKAREA,
                  "Invalidating work areas of window %s due to struts update\n",
                  window->desc);
      invalidate_work_areas (window);
    }
  else
    {
      meta_topic (META_DEBUG_WORKAREA,
                  "Struts on %s were unchanged\n", window->desc);
    }
}

void
meta_window_recalc_window_type (MetaWindow *window)
{
  recalc_window_type (window);
}

static void
recalc_window_type (MetaWindow *window)
{
  MetaWindowType old_type;

  old_type = window->type;

  if (window->type_atom != None)
    {
      if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_DESKTOP)
        window->type = META_WINDOW_DESKTOP;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_DOCK)
        window->type = META_WINDOW_DOCK;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_TOOLBAR)
        window->type = META_WINDOW_TOOLBAR;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_MENU)
        window->type = META_WINDOW_MENU;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_UTILITY)
        window->type = META_WINDOW_UTILITY;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_SPLASH)
        window->type = META_WINDOW_SPLASHSCREEN;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_DIALOG)
        window->type = META_WINDOW_DIALOG;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_NORMAL)
        window->type = META_WINDOW_NORMAL;
      /* The below are *typically* override-redirect windows, but the spec does
       * not disallow using them for managed windows.
       */
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_DROPDOWN_MENU)
        window->type = META_WINDOW_DROPDOWN_MENU;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_POPUP_MENU)
        window->type = META_WINDOW_POPUP_MENU;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_TOOLTIP)
        window->type = META_WINDOW_TOOLTIP;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_NOTIFICATION)
        window->type = META_WINDOW_NOTIFICATION;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_COMBO)
        window->type = META_WINDOW_COMBO;
      else if (window->type_atom  == window->display->atom__NET_WM_WINDOW_TYPE_DND)
        window->type = META_WINDOW_DND;
      else
        {
          char *atom_name;

          /*
           * Fallback on a normal type, and print warning. Don't abort.
           */
          window->type = META_WINDOW_NORMAL;

          meta_error_trap_push (window->display);
          atom_name = XGetAtomName (window->display->xdisplay,
                                    window->type_atom);
          meta_error_trap_pop (window->display);

          meta_warning ("Unrecognized type atom [%s] set for %s \n",
                        atom_name ? atom_name : "unknown",
                        window->desc);

          if (atom_name)
            XFree (atom_name);
        }
    }
  else if (window->xtransient_for != None)
    {
      window->type = META_WINDOW_DIALOG;
    }
  else
    {
      window->type = META_WINDOW_NORMAL;
    }

  if (window->type == META_WINDOW_DIALOG &&
      window->wm_state_modal)
    window->type = META_WINDOW_MODAL_DIALOG;

  /* We don't want to allow override-redirect windows to have decorated-window
   * types since that's just confusing.
   */
  if (window->override_redirect)
    {
      switch (window->type)
        {
        /* Decorated types */
        case META_WINDOW_NORMAL:
        case META_WINDOW_DIALOG:
        case META_WINDOW_MODAL_DIALOG:
        case META_WINDOW_MENU:
        case META_WINDOW_UTILITY:
          window->type = META_WINDOW_OVERRIDE_OTHER;
          break;
        /* Undecorated types, normally not override-redirect */
        case META_WINDOW_DESKTOP:
        case META_WINDOW_DOCK:
        case META_WINDOW_TOOLBAR:
        case META_WINDOW_SPLASHSCREEN:
        /* Undecorated types, normally override-redirect types */
        case META_WINDOW_DROPDOWN_MENU:
        case META_WINDOW_POPUP_MENU:
        case META_WINDOW_TOOLTIP:
        case META_WINDOW_NOTIFICATION:
        case META_WINDOW_COMBO:
        case META_WINDOW_DND:
        /* To complete enum */
        case META_WINDOW_OVERRIDE_OTHER:
          break;
        }
    }

  meta_verbose ("Calculated type %u for %s, old type %u\n",
                window->type, window->desc, old_type);

  if (old_type != window->type)
    {
      gboolean old_decorated = window->decorated;
      GObject  *object = G_OBJECT (window);

      recalc_window_features (window);

      if (!window->override_redirect)
	set_net_wm_state (window);

      /* Update frame */
      if (window->decorated)
        meta_window_ensure_frame (window);
      else
        meta_window_destroy_frame (window);

      /* update stacking constraints */
      meta_window_update_layer (window);

      meta_window_grab_keys (window);

      g_object_freeze_notify (object);

      if (old_decorated != window->decorated)
        g_object_notify (object, "decorated");

      g_object_notify (object, "window-type");

      g_object_thaw_notify (object);
    }
}

static void
set_allowed_actions_hint (MetaWindow *window)
{
#define MAX_N_ACTIONS 12
  unsigned long data[MAX_N_ACTIONS];
  int i;

  i = 0;
  if (window->has_move_func)
    {
      data[i] = window->display->atom__NET_WM_ACTION_MOVE;
      ++i;
    }
  if (window->has_resize_func)
    {
      data[i] = window->display->atom__NET_WM_ACTION_RESIZE;
      ++i;
    }
  if (window->has_fullscreen_func)
    {
      data[i] = window->display->atom__NET_WM_ACTION_FULLSCREEN;
      ++i;
    }
  if (window->has_minimize_func)
    {
      data[i] = window->display->atom__NET_WM_ACTION_MINIMIZE;
      ++i;
    }
  if (window->has_shade_func)
    {
      data[i] = window->display->atom__NET_WM_ACTION_SHADE;
      ++i;
    }
  /* sticky according to EWMH is different from mutter's sticky;
   * mutter doesn't support EWMH sticky
   */
  if (window->has_maximize_func)
    {
      data[i] = window->display->atom__NET_WM_ACTION_MAXIMIZE_HORZ;
      ++i;
      data[i] = window->display->atom__NET_WM_ACTION_MAXIMIZE_VERT;
      ++i;
    }
  /* We always allow this */
  data[i] = window->display->atom__NET_WM_ACTION_CHANGE_DESKTOP;
  ++i;
  if (window->has_close_func)
    {
      data[i] = window->display->atom__NET_WM_ACTION_CLOSE;
      ++i;
    }

  /* I guess we always allow above/below operations */
  data[i] = window->display->atom__NET_WM_ACTION_ABOVE;
  ++i;
  data[i] = window->display->atom__NET_WM_ACTION_BELOW;
  ++i;

  g_assert (i <= MAX_N_ACTIONS);

  meta_verbose ("Setting _NET_WM_ALLOWED_ACTIONS with %d atoms\n", i);

  meta_error_trap_push (window->display);
  XChangeProperty (window->display->xdisplay, window->xwindow,
                   window->display->atom__NET_WM_ALLOWED_ACTIONS,
                   XA_ATOM,
                   32, PropModeReplace, (guchar*) data, i);
  meta_error_trap_pop (window->display);
#undef MAX_N_ACTIONS
}

void
meta_window_recalc_features (MetaWindow *window)
{
  recalc_window_features (window);
}

static void
recalc_window_features (MetaWindow *window)
{
  gboolean old_has_close_func;
  gboolean old_has_minimize_func;
  gboolean old_has_move_func;
  gboolean old_has_resize_func;
  gboolean old_has_shade_func;
  gboolean old_always_sticky;

  old_has_close_func = window->has_close_func;
  old_has_minimize_func = window->has_minimize_func;
  old_has_move_func = window->has_move_func;
  old_has_resize_func = window->has_resize_func;
  old_has_shade_func = window->has_shade_func;
  old_always_sticky = window->always_sticky;

  /* Use MWM hints initially */
  window->decorated = window->mwm_decorated;
  window->border_only = window->mwm_border_only;
  window->has_close_func = window->mwm_has_close_func;
  window->has_minimize_func = window->mwm_has_minimize_func;
  window->has_maximize_func = window->mwm_has_maximize_func;
  window->has_move_func = window->mwm_has_move_func;

  window->has_resize_func = TRUE;

  /* If min_size == max_size, then don't allow resize */
  if (window->size_hints.min_width == window->size_hints.max_width &&
      window->size_hints.min_height == window->size_hints.max_height)
    window->has_resize_func = FALSE;
  else if (!window->mwm_has_resize_func)
    {
      /* We ignore mwm_has_resize_func because WM_NORMAL_HINTS is the
       * authoritative source for that info. Some apps such as mplayer or
       * xine disable resize via MWM but not WM_NORMAL_HINTS, but that
       * leads to e.g. us not fullscreening their windows.  Apps that set
       * MWM but not WM_NORMAL_HINTS are basically broken. We complain
       * about these apps but make them work.
       */

      meta_warning (_("Window %s sets an MWM hint indicating it isn't resizable, but sets min size %d x %d and max size %d x %d; this doesn't make much sense.\n"),
                    window->desc,
                    window->size_hints.min_width,
                    window->size_hints.min_height,
                    window->size_hints.max_width,
                    window->size_hints.max_height);
    }

  window->has_shade_func = TRUE;
  window->has_fullscreen_func = TRUE;

  window->always_sticky = FALSE;

  /* Semantic category overrides the MWM hints */
  if (window->type == META_WINDOW_TOOLBAR)
    window->decorated = FALSE;

  if (meta_window_is_attached_dialog (window))
    window->border_only = TRUE;

  if (window->type == META_WINDOW_DESKTOP ||
      window->type == META_WINDOW_DOCK ||
      window->override_redirect)
    window->always_sticky = TRUE;

  if (window->override_redirect ||
      meta_window_get_frame_type (window) == META_FRAME_TYPE_LAST)
    {
      window->decorated = FALSE;
      window->has_close_func = FALSE;
      window->has_shade_func = FALSE;

      /* FIXME this keeps panels and things from using
       * NET_WM_MOVERESIZE; the problem is that some
       * panels (edge panels) have fixed possible locations,
       * and others ("floating panels") do not.
       *
       * Perhaps we should require edge panels to explicitly
       * disable movement?
       */
      window->has_move_func = FALSE;
      window->has_resize_func = FALSE;
    }

  if (window->type != META_WINDOW_NORMAL)
    {
      window->has_minimize_func = FALSE;
      window->has_maximize_func = FALSE;
      window->has_fullscreen_func = FALSE;
    }

  if (!window->has_resize_func)
    {
      window->has_maximize_func = FALSE;

      /* don't allow fullscreen if we can't resize, unless the size
       * is entire screen size (kind of broken, because we
       * actually fullscreen to monitor size not screen size)
       */
      if (window->size_hints.min_width == window->screen->rect.width &&
          window->size_hints.min_height == window->screen->rect.height)
        ; /* leave fullscreen available */
      else
        window->has_fullscreen_func = FALSE;
    }

  /* We leave fullscreen windows decorated, just push the frame outside
   * the screen. This avoids flickering to unparent them.
   *
   * Note that setting has_resize_func = FALSE here must come after the
   * above code that may disable fullscreen, because if the window
   * is not resizable purely due to fullscreen, we don't want to
   * disable fullscreen mode.
   */
  if (window->fullscreen)
    {
      window->has_shade_func = FALSE;
      window->has_move_func = FALSE;
      window->has_resize_func = FALSE;
      window->has_maximize_func = FALSE;
    }

  if (window->has_maximize_func)
    {
      MetaRectangle work_area;
      MetaFrameBorders borders;
      int min_frame_width, min_frame_height;

      meta_window_get_work_area_current_monitor (window, &work_area);
      meta_frame_calc_borders (window->frame, &borders);

      min_frame_width = window->size_hints.min_width + borders.visible.left + borders.visible.right;
      min_frame_height = window->size_hints.min_height + borders.visible.top + borders.visible.bottom;

      if (min_frame_width >= work_area.width ||
          min_frame_height >= work_area.height)
        window->has_maximize_func = FALSE;
    }

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Window %s fullscreen = %d not resizable, maximizable = %d fullscreenable = %d min size %dx%d max size %dx%d\n",
              window->desc,
              window->fullscreen,
              window->has_maximize_func, window->has_fullscreen_func,
              window->size_hints.min_width,
              window->size_hints.min_height,
              window->size_hints.max_width,
              window->size_hints.max_height);

  /* no shading if not decorated */
  if (!window->decorated || window->border_only)
    window->has_shade_func = FALSE;

  window->skip_taskbar = FALSE;
  window->skip_pager = FALSE;

  if (window->wm_state_skip_taskbar)
    window->skip_taskbar = TRUE;

  if (window->wm_state_skip_pager)
    window->skip_pager = TRUE;

  switch (window->type)
    {
      /* Force skip taskbar/pager on these window types */
    case META_WINDOW_DESKTOP:
    case META_WINDOW_DOCK:
    case META_WINDOW_TOOLBAR:
    case META_WINDOW_MENU:
    case META_WINDOW_UTILITY:
    case META_WINDOW_SPLASHSCREEN:
    case META_WINDOW_DROPDOWN_MENU:
    case META_WINDOW_POPUP_MENU:
    case META_WINDOW_TOOLTIP:
    case META_WINDOW_NOTIFICATION:
    case META_WINDOW_COMBO:
    case META_WINDOW_DND:
    case META_WINDOW_OVERRIDE_OTHER:
      window->skip_taskbar = TRUE;
      window->skip_pager = TRUE;
      break;

    case META_WINDOW_DIALOG:
    case META_WINDOW_MODAL_DIALOG:
      /* only skip taskbar if we have a real transient parent */
      if (window->xtransient_for != None &&
          window->xtransient_for != window->screen->xroot)
        window->skip_taskbar = TRUE;
      break;

    case META_WINDOW_NORMAL:
      break;
    }

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Window %s decorated = %d border_only = %d has_close = %d has_minimize = %d has_maximize = %d has_move = %d has_shade = %d skip_taskbar = %d skip_pager = %d\n",
              window->desc,
              window->decorated,
              window->border_only,
              window->has_close_func,
              window->has_minimize_func,
              window->has_maximize_func,
              window->has_move_func,
              window->has_shade_func,
              window->skip_taskbar,
              window->skip_pager);

  /* FIXME:
   * Lame workaround for recalc_window_features
   * being used overzealously. The fix is to
   * only recalc_window_features when something
   * has actually changed.
   */
  if (window->constructing                               ||
      old_has_close_func != window->has_close_func       ||
      old_has_minimize_func != window->has_minimize_func ||
      old_has_move_func != window->has_move_func         ||
      old_has_resize_func != window->has_resize_func     ||
      old_has_shade_func != window->has_shade_func       ||
      old_always_sticky != window->always_sticky)
    set_allowed_actions_hint (window);

  if (window->has_resize_func != old_has_resize_func)
    g_object_notify (G_OBJECT (window), "resizeable");

  /* FIXME perhaps should ensure if we don't have a shade func,
   * we aren't shaded, etc.
   */
}

static void
menu_callback (MetaWindowMenu *menu,
               Display        *xdisplay,
               Window          client_xwindow,
               guint32         timestamp,
               MetaMenuOp      op,
               int             workspace_index,
               gpointer        data)
{
  MetaDisplay *display;
  MetaWindow *window;
  MetaWorkspace *workspace;

  display = meta_display_for_x_display (xdisplay);
  window = meta_display_lookup_x_window (display, client_xwindow);
  workspace = NULL;

  if (window != NULL) /* window can be NULL */
    {
      meta_verbose ("Menu op %u on %s\n", op, window->desc);

      switch (op)
        {
        case META_MENU_OP_NONE:
          /* nothing */
          break;

        case META_MENU_OP_DELETE:
          meta_window_delete (window, timestamp);
          break;

        case META_MENU_OP_MINIMIZE:
          meta_window_minimize (window);
          break;

        case META_MENU_OP_UNMAXIMIZE:
          meta_window_unmaximize (window,
                                  META_MAXIMIZE_HORIZONTAL |
                                  META_MAXIMIZE_VERTICAL);
          break;

        case META_MENU_OP_MAXIMIZE:
          meta_window_maximize (window,
                                META_MAXIMIZE_HORIZONTAL |
                                META_MAXIMIZE_VERTICAL);
          break;

        case META_MENU_OP_UNSHADE:
          meta_window_unshade (window, timestamp);
          break;

        case META_MENU_OP_SHADE:
          meta_window_shade (window, timestamp);
          break;

        case META_MENU_OP_MOVE_LEFT:
          workspace = meta_workspace_get_neighbor (window->screen->active_workspace,
                                                   META_MOTION_LEFT);
          break;

        case META_MENU_OP_MOVE_RIGHT:
          workspace = meta_workspace_get_neighbor (window->screen->active_workspace,
                                                   META_MOTION_RIGHT);
          break;

        case META_MENU_OP_MOVE_UP:
          workspace = meta_workspace_get_neighbor (window->screen->active_workspace,
                                                   META_MOTION_UP);
          break;

        case META_MENU_OP_MOVE_DOWN:
          workspace = meta_workspace_get_neighbor (window->screen->active_workspace,
                                                   META_MOTION_DOWN);
          break;

        case META_MENU_OP_WORKSPACES:
          workspace = meta_screen_get_workspace_by_index (window->screen,
                                                          workspace_index);
          break;

        case META_MENU_OP_STICK:
          meta_window_stick (window);
          break;

        case META_MENU_OP_UNSTICK:
          meta_window_unstick (window);
          break;

        case META_MENU_OP_ABOVE:
        case META_MENU_OP_UNABOVE:
          if (window->wm_state_above == FALSE)
            meta_window_make_above (window);
          else
            meta_window_unmake_above (window);
          break;

        case META_MENU_OP_MOVE:
          meta_window_begin_grab_op (window,
                                     META_GRAB_OP_KEYBOARD_MOVING,
                                     TRUE,
                                     timestamp);
          break;

        case META_MENU_OP_RESIZE:
          meta_window_begin_grab_op (window,
                                     META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN,
                                     TRUE,
                                     timestamp);
          break;

        case META_MENU_OP_RECOVER:
          meta_window_shove_titlebar_onscreen (window);
          break;

        default:
          meta_warning (G_STRLOC": Unknown window op\n");
          break;
        }

      if (workspace)
	{
	  meta_window_change_workspace (window,
					workspace);
	}
    }
  else
    {
      meta_verbose ("Menu callback on nonexistent window\n");
    }

  if (display->window_menu == menu)
    {
      display->window_menu = NULL;
      display->window_with_menu = NULL;
    }

  meta_ui_window_menu_free (menu);
}

void
meta_window_show_menu (MetaWindow *window,
                       int         root_x,
                       int         root_y,
                       int         button,
                       guint32     timestamp)
{
  MetaMenuOp ops;
  MetaMenuOp insensitive;
  MetaWindowMenu *menu;
  MetaWorkspaceLayout layout;
  int n_workspaces;
  gboolean ltr;

  g_return_if_fail (!window->override_redirect);

  if (window->display->window_menu)
    {
      meta_ui_window_menu_free (window->display->window_menu);
      window->display->window_menu = NULL;
      window->display->window_with_menu = NULL;
    }

  ops = META_MENU_OP_NONE;
  insensitive = META_MENU_OP_NONE;

  ops |= (META_MENU_OP_DELETE | META_MENU_OP_MINIMIZE | META_MENU_OP_MOVE | META_MENU_OP_RESIZE);

  if (!meta_window_titlebar_is_onscreen (window) &&
      window->type != META_WINDOW_DOCK &&
      window->type != META_WINDOW_DESKTOP)
    ops |= META_MENU_OP_RECOVER;

  if (!meta_prefs_get_workspaces_only_on_primary () ||
      meta_window_is_on_primary_monitor (window))
    {
      n_workspaces = meta_screen_get_n_workspaces (window->screen);

      if (n_workspaces > 1)
        ops |= META_MENU_OP_WORKSPACES;

      meta_screen_calc_workspace_layout (window->screen,
                                         n_workspaces,
                                         meta_workspace_index ( window->screen->active_workspace),
                                         &layout);

      if (!window->on_all_workspaces)
        {
          ltr = meta_ui_get_direction() == META_UI_DIRECTION_LTR;

          if (layout.current_col > 0)
            ops |= ltr ? META_MENU_OP_MOVE_LEFT : META_MENU_OP_MOVE_RIGHT;
          if ((layout.current_col < layout.cols - 1) &&
              (layout.current_row * layout.cols + (layout.current_col + 1) < n_workspaces))
            ops |= ltr ? META_MENU_OP_MOVE_RIGHT : META_MENU_OP_MOVE_LEFT;
          if (layout.current_row > 0)
            ops |= META_MENU_OP_MOVE_UP;
          if ((layout.current_row < layout.rows - 1) &&
              ((layout.current_row + 1) * layout.cols + layout.current_col < n_workspaces))
            ops |= META_MENU_OP_MOVE_DOWN;
        }

      meta_screen_free_workspace_layout (&layout);

      ops |= META_MENU_OP_UNSTICK;
      ops |= META_MENU_OP_STICK;
    }

  if (META_WINDOW_MAXIMIZED (window))
    ops |= META_MENU_OP_UNMAXIMIZE;
  else
    ops |= META_MENU_OP_MAXIMIZE;

  if (window->wm_state_above)
    ops |= META_MENU_OP_UNABOVE;
  else
    ops |= META_MENU_OP_ABOVE;

  if (!window->has_maximize_func)
    insensitive |= META_MENU_OP_UNMAXIMIZE | META_MENU_OP_MAXIMIZE;

  if (!window->has_minimize_func)
    insensitive |= META_MENU_OP_MINIMIZE;

  if (!window->has_close_func)
    insensitive |= META_MENU_OP_DELETE;

  if (!window->has_shade_func)
    insensitive |= META_MENU_OP_SHADE | META_MENU_OP_UNSHADE;

  if (!META_WINDOW_ALLOWS_MOVE (window))
    insensitive |= META_MENU_OP_MOVE;

  if (!META_WINDOW_ALLOWS_RESIZE (window))
    insensitive |= META_MENU_OP_RESIZE;

   if (window->always_sticky)
     insensitive |= META_MENU_OP_STICK | META_MENU_OP_UNSTICK | META_MENU_OP_WORKSPACES;

  if ((window->type == META_WINDOW_DESKTOP) ||
      (window->type == META_WINDOW_DOCK) ||
      (window->type == META_WINDOW_SPLASHSCREEN ||
      META_WINDOW_MAXIMIZED (window)))
    insensitive |= META_MENU_OP_ABOVE | META_MENU_OP_UNABOVE;

  /* If all operations are disabled, just quit without showing the menu.
   * This is the case, for example, with META_WINDOW_DESKTOP windows.
   */
  if ((ops & ~insensitive) == 0)
    return;

  menu =
    meta_ui_window_menu_new (window->screen->ui,
                             window->xwindow,
                             ops,
                             insensitive,
                             meta_window_get_net_wm_desktop (window),
                             meta_screen_get_n_workspaces (window->screen),
                             menu_callback,
                             NULL);

  window->display->window_menu = menu;
  window->display->window_with_menu = window;

  meta_verbose ("Popping up window menu for %s\n", window->desc);

  meta_ui_window_menu_popup (menu, root_x, root_y, button, timestamp);
}

void
meta_window_shove_titlebar_onscreen (MetaWindow *window)
{
  MetaRectangle  outer_rect;
  GList         *onscreen_region;
  int            horiz_amount, vert_amount;
  int            newx, newy;

  g_return_if_fail (!window->override_redirect);

  /* If there's no titlebar, don't bother */
  if (!window->frame)
    return;

  /* Get the basic info we need */
  meta_window_get_outer_rect (window, &outer_rect);
  onscreen_region = window->screen->active_workspace->screen_region;

  /* Extend the region (just in case the window is too big to fit on the
   * screen), then shove the window on screen, then return the region to
   * normal.
   */
  horiz_amount = outer_rect.width;
  vert_amount  = outer_rect.height;
  meta_rectangle_expand_region (onscreen_region,
                                horiz_amount,
                                horiz_amount,
                                0,
                                vert_amount);
  meta_rectangle_shove_into_region(onscreen_region,
                                   FIXED_DIRECTION_X,
                                   &outer_rect);
  meta_rectangle_expand_region (onscreen_region,
                                -horiz_amount,
                                -horiz_amount,
                                0,
                                -vert_amount);

  newx = outer_rect.x + window->frame->child_x;
  newy = outer_rect.y + window->frame->child_y;
  meta_window_move_resize (window,
                           FALSE,
                           newx,
                           newy,
                           window->rect.width,
                           window->rect.height);
}

gboolean
meta_window_titlebar_is_onscreen (MetaWindow *window)
{
  MetaRectangle  titlebar_rect;
  GList         *onscreen_region;
  gboolean       is_onscreen;

  const int min_height_needed  = 8;
  const int min_width_percent  = 0.5;
  const int min_width_absolute = 50;

  /* Titlebar can't be offscreen if there is no titlebar... */
  if (!window->frame)
    return FALSE;

  /* Get the rectangle corresponding to the titlebar */
  meta_window_get_outer_rect (window, &titlebar_rect);
  titlebar_rect.height = window->frame->child_y;

  /* Run through the spanning rectangles for the screen and see if one of
   * them overlaps with the titlebar sufficiently to consider it onscreen.
   */
  is_onscreen = FALSE;
  onscreen_region = window->screen->active_workspace->screen_region;
  while (onscreen_region)
    {
      MetaRectangle *spanning_rect = onscreen_region->data;
      MetaRectangle overlap;

      meta_rectangle_intersect (&titlebar_rect, spanning_rect, &overlap);
      if (overlap.height > MIN (titlebar_rect.height, min_height_needed) &&
          overlap.width  > MIN (titlebar_rect.width * min_width_percent,
                                min_width_absolute))
        {
          is_onscreen = TRUE;
          break;
        }

      onscreen_region = onscreen_region->next;
    }

  return is_onscreen;
}

static double
timeval_to_ms (const GTimeVal *timeval)
{
  return (timeval->tv_sec * G_USEC_PER_SEC + timeval->tv_usec) / 1000.0;
}

static double
time_diff (const GTimeVal *first,
	   const GTimeVal *second)
{
  double first_ms = timeval_to_ms (first);
  double second_ms = timeval_to_ms (second);

  return first_ms - second_ms;
}

static gboolean
check_moveresize_frequency (MetaWindow *window,
			    gdouble    *remaining)
{
  GTimeVal current_time;

  g_get_current_time (&current_time);

#ifdef HAVE_XSYNC
  if (!window->disable_sync &&
      window->display->grab_sync_request_alarm != None)
    {
      if (window->sync_request_time.tv_sec != 0 ||
	  window->sync_request_time.tv_usec != 0)
	{
	  double elapsed =
	    time_diff (&current_time, &window->sync_request_time);

	  if (elapsed < 1000.0)
	    {
	      /* We want to be sure that the timeout happens at
	       * a time where elapsed will definitely be
	       * greater than 1000, so we can disable sync
	       */
	      if (remaining)
		*remaining = 1000.0 - elapsed + 100;

	      return FALSE;
	    }
	  else
	    {
	      /* We have now waited for more than a second for the
	       * application to respond to the sync request
	       */
	      window->disable_sync = TRUE;
	      return TRUE;
	    }
	}
      else
	{
	  /* No outstanding sync requests. Go ahead and resize
	   */
	  return TRUE;
	}
    }
  else
#endif /* HAVE_XSYNC */
    {
      const double max_resizes_per_second = 25.0;
      const double ms_between_resizes = 1000.0 / max_resizes_per_second;
      double elapsed;

      elapsed = time_diff (&current_time, &window->display->grab_last_moveresize_time);

      if (elapsed >= 0.0 && elapsed < ms_between_resizes)
	{
	  meta_topic (META_DEBUG_RESIZING,
		      "Delaying move/resize as only %g of %g ms elapsed\n",
		      elapsed, ms_between_resizes);

	  if (remaining)
	    *remaining = (ms_between_resizes - elapsed);

	  return FALSE;
	}

      meta_topic (META_DEBUG_RESIZING,
		  " Checked moveresize freq, allowing move/resize now (%g of %g seconds elapsed)\n",
		  elapsed / 1000.0, 1.0 / max_resizes_per_second);

      return TRUE;
    }
}

static gboolean
update_move_timeout (gpointer data)
{
  MetaWindow *window = data;

  update_move (window,
               window->display->grab_last_user_action_was_snap,
               window->display->grab_latest_motion_x,
               window->display->grab_latest_motion_y);

  return FALSE;
}

static void
update_move (MetaWindow  *window,
             gboolean     snap,
             int          x,
             int          y)
{
  int dx, dy;
  int new_x, new_y;
  MetaRectangle old;
  int shake_threshold;
  MetaDisplay *display = window->display;

  display->grab_latest_motion_x = x;
  display->grab_latest_motion_y = y;

  dx = x - display->grab_anchor_root_x;
  dy = y - display->grab_anchor_root_y;

  new_x = display->grab_anchor_window_pos.x + dx;
  new_y = display->grab_anchor_window_pos.y + dy;

  meta_verbose ("x,y = %d,%d anchor ptr %d,%d anchor pos %d,%d dx,dy %d,%d\n",
                x, y,
                display->grab_anchor_root_x,
                display->grab_anchor_root_y,
                display->grab_anchor_window_pos.x,
                display->grab_anchor_window_pos.y,
                dx, dy);

  /* Don't bother doing anything if no move has been specified.  (This
   * happens often, even in keyboard moving, due to the warping of the
   * pointer.
   */
  if (dx == 0 && dy == 0)
    return;

  /* Originally for detaching maximized windows, but we use this
   * for the zones at the sides of the monitor where trigger tiling
   * because it's about the right size
   */
#define DRAG_THRESHOLD_TO_SHAKE_THRESHOLD_FACTOR 6
  shake_threshold = meta_ui_get_drag_threshold (window->screen->ui) *
    DRAG_THRESHOLD_TO_SHAKE_THRESHOLD_FACTOR;

  if (snap)
    {
      /* We don't want to tile while snapping. Also, clear any previous tile
         request. */
      window->tile_mode = META_TILE_NONE;
      window->tile_monitor_number = -1;
    }
  else if (meta_prefs_get_edge_tiling () &&
           !META_WINDOW_MAXIMIZED (window) &&
           !META_WINDOW_TILED_SIDE_BY_SIDE (window))
    {
      const MetaMonitorInfo *monitor;
      MetaRectangle work_area;

      /* For side-by-side tiling we are interested in the inside vertical
       * edges of the work area of the monitor where the pointer is located,
       * and in the outside top edge for maximized tiling.
       *
       * For maximized tiling we use the outside edge instead of the
       * inside edge, because we don't want to force users to maximize
       * windows they are placing near the top of their screens.
       *
       * The "current" idea of meta_window_get_work_area_current_monitor() and
       * meta_screen_get_current_monitor() is slightly different: the former
       * refers to the monitor which contains the largest part of the window,
       * the latter to the one where the pointer is located.
       */
      monitor = meta_screen_get_current_monitor_info (window->screen);
      meta_window_get_work_area_for_monitor (window,
                                             monitor->number,
                                             &work_area);

      /* Check if the cursor is in a position which triggers tiling
       * and set tile_mode accordingly.
       */
      if (meta_window_can_tile_side_by_side (window) &&
          x >= monitor->rect.x && x < (work_area.x + shake_threshold))
        window->tile_mode = META_TILE_LEFT;
      else if (meta_window_can_tile_side_by_side (window) &&
               x >= work_area.x + work_area.width - shake_threshold &&
               x < (monitor->rect.x + monitor->rect.width))
        window->tile_mode = META_TILE_RIGHT;
      else if (meta_window_can_tile_maximized (window) &&
               y >= monitor->rect.y && y <= work_area.y)
        window->tile_mode = META_TILE_MAXIMIZED;
      else
        window->tile_mode = META_TILE_NONE;

      if (window->tile_mode != META_TILE_NONE)
        window->tile_monitor_number = monitor->number;
    }

  /* shake loose (unmaximize) maximized or tiled window if dragged beyond
   * the threshold in the Y direction. Tiled windows can also be pulled
   * loose via X motion.
   */

  if ((META_WINDOW_MAXIMIZED (window) && ABS (dy) >= shake_threshold) ||
      (META_WINDOW_TILED_SIDE_BY_SIDE (window) && (MAX (ABS (dx), ABS (dy)) >= shake_threshold)))
    {
      double prop;

      /* Shake loose, so that the window snaps back to maximized
       * when dragged near the top; do not snap back if tiling
       * is enabled, as top edge tiling can be used in that case
       */
      window->shaken_loose = !meta_prefs_get_edge_tiling ();
      window->tile_mode = META_TILE_NONE;

      /* move the unmaximized window to the cursor */
      prop =
        ((double)(x - display->grab_initial_window_pos.x)) /
        ((double)display->grab_initial_window_pos.width);

      display->grab_initial_window_pos.x =
        x - window->saved_rect.width * prop;
      display->grab_initial_window_pos.y = y;

      if (window->frame)
        {
          display->grab_initial_window_pos.y += window->frame->child_y / 2;
        }

      window->saved_rect.x = display->grab_initial_window_pos.x;
      window->saved_rect.y = display->grab_initial_window_pos.y;
      display->grab_anchor_root_x = x;
      display->grab_anchor_root_y = y;

      meta_window_unmaximize (window,
                              META_MAXIMIZE_HORIZONTAL |
                              META_MAXIMIZE_VERTICAL);

      return;
    }

  /* remaximize window on another monitor if window has been shaken
   * loose or it is still maximized (then move straight)
   */
  else if ((window->shaken_loose || META_WINDOW_MAXIMIZED (window)) &&
           window->tile_mode != META_TILE_LEFT && window->tile_mode != META_TILE_RIGHT)
    {
      const MetaMonitorInfo *wmonitor;
      MetaRectangle work_area;
      int monitor;

      window->tile_mode = META_TILE_NONE;
      wmonitor = meta_screen_get_monitor_for_window (window->screen, window);

      for (monitor = 0; monitor < window->screen->n_monitor_infos; monitor++)
        {
          meta_window_get_work_area_for_monitor (window, monitor, &work_area);

          /* check if cursor is near the top of a monitor work area */
          if (x >= work_area.x &&
              x < (work_area.x + work_area.width) &&
              y >= work_area.y &&
              y < (work_area.y + shake_threshold))
            {
              /* move the saved rect if window will become maximized on an
               * other monitor so user isn't surprised on a later unmaximize
               */
              if (wmonitor->number != monitor)
                {
                  window->saved_rect.x = work_area.x;
                  window->saved_rect.y = work_area.y;

                  if (window->frame)
                    {
                      window->saved_rect.x += window->frame->child_x;
                      window->saved_rect.y += window->frame->child_y;
                    }

                  window->user_rect.x = window->saved_rect.x;
                  window->user_rect.y = window->saved_rect.y;

                  meta_window_unmaximize (window,
                                          META_MAXIMIZE_HORIZONTAL |
                                          META_MAXIMIZE_VERTICAL);
                }

              display->grab_initial_window_pos = work_area;
              display->grab_anchor_root_x = x;
              display->grab_anchor_root_y = y;
              window->shaken_loose = FALSE;

              meta_window_maximize (window,
                                    META_MAXIMIZE_HORIZONTAL |
                                    META_MAXIMIZE_VERTICAL);

              return;
            }
        }
    }

  /* Delay showing the tile preview slightly to make it more unlikely to
   * trigger it unwittingly, e.g. when shaking loose the window or moving
   * it to another monitor.
   */
  meta_screen_tile_preview_update (window->screen,
                                   window->tile_mode != META_TILE_NONE);

  meta_window_get_client_root_coords (window, &old);

  /* Don't allow movement in the maximized directions or while tiled */
  if (window->maximized_horizontally || META_WINDOW_TILED_SIDE_BY_SIDE (window))
    new_x = old.x;
  if (window->maximized_vertically)
    new_y = old.y;

  /* Do any edge resistance/snapping */
  meta_window_edge_resistance_for_move (window,
                                        old.x,
                                        old.y,
                                        &new_x,
                                        &new_y,
                                        update_move_timeout,
                                        snap,
                                        FALSE);

  meta_window_move (window, TRUE, new_x, new_y);
}

/* When resizing a maximized window by using alt-middle-drag (resizing
 * with the grips or the menu for a maximized window is not enabled),
 * the user can "break" out of the maximized state. This checks for
 * that possibility. During such a break-out resize the user can also
 * return to the previous maximization state by resizing back to near
 * the original size.
 */
static MetaMaximizeFlags
check_resize_unmaximize(MetaWindow *window,
                        int         dx,
                        int         dy)
{
  int threshold;
  MetaMaximizeFlags new_unmaximize;

#define DRAG_THRESHOLD_TO_RESIZE_THRESHOLD_FACTOR 3

  threshold = meta_ui_get_drag_threshold (window->screen->ui) *
    DRAG_THRESHOLD_TO_RESIZE_THRESHOLD_FACTOR;
  new_unmaximize = 0;

  if (window->maximized_horizontally ||
      window->tile_mode != META_TILE_NONE ||
      (window->display->grab_resize_unmaximize & META_MAXIMIZE_HORIZONTAL) != 0)
    {
      int x_amount;

      /* We allow breaking out of maximization in either direction, to make
       * the window larger than the monitor as well as smaller than the
       * monitor. If we wanted to only allow resizing smaller than the
       * monitor, we'd use - dx for NE/E/SE and dx for SW/W/NW.
       */
      switch (window->display->grab_op)
        {
        case META_GRAB_OP_RESIZING_NE:
        case META_GRAB_OP_KEYBOARD_RESIZING_NE:
        case META_GRAB_OP_RESIZING_E:
        case META_GRAB_OP_KEYBOARD_RESIZING_E:
        case META_GRAB_OP_RESIZING_SE:
        case META_GRAB_OP_KEYBOARD_RESIZING_SE:
        case META_GRAB_OP_RESIZING_SW:
        case META_GRAB_OP_KEYBOARD_RESIZING_SW:
        case META_GRAB_OP_RESIZING_W:
        case META_GRAB_OP_KEYBOARD_RESIZING_W:
        case META_GRAB_OP_RESIZING_NW:
        case META_GRAB_OP_KEYBOARD_RESIZING_NW:
          x_amount = dx < 0 ? - dx : dx;
          break;
        default:
          x_amount = 0;
          break;
        }

      if (x_amount > threshold)
        new_unmaximize |= META_MAXIMIZE_HORIZONTAL;
    }

  if (window->maximized_vertically ||
      (window->display->grab_resize_unmaximize & META_MAXIMIZE_VERTICAL) != 0)
    {
      int y_amount;

      switch (window->display->grab_op)
        {
        case META_GRAB_OP_RESIZING_N:
        case META_GRAB_OP_KEYBOARD_RESIZING_N:
        case META_GRAB_OP_RESIZING_NE:
        case META_GRAB_OP_KEYBOARD_RESIZING_NE:
        case META_GRAB_OP_RESIZING_NW:
        case META_GRAB_OP_KEYBOARD_RESIZING_NW:
        case META_GRAB_OP_RESIZING_SE:
        case META_GRAB_OP_KEYBOARD_RESIZING_SE:
        case META_GRAB_OP_RESIZING_S:
        case META_GRAB_OP_KEYBOARD_RESIZING_S:
        case META_GRAB_OP_RESIZING_SW:
        case META_GRAB_OP_KEYBOARD_RESIZING_SW:
          y_amount = dy < 0 ? - dy : dy;
          break;
        default:
          y_amount = 0;
          break;
        }

      if (y_amount > threshold)
        new_unmaximize |= META_MAXIMIZE_VERTICAL;
    }

  /* Metacity doesn't have a full user interface for only horizontally or
   * vertically maximized, so while only unmaximizing in the direction drags
   * has some advantages, it will also confuse the user. So, we always
   * unmaximize both ways if possible.
   */
  if (new_unmaximize != 0)
    {
      new_unmaximize = 0;

      if (window->maximized_horizontally ||
          (window->display->grab_resize_unmaximize & META_MAXIMIZE_HORIZONTAL) != 0)
        new_unmaximize |= META_MAXIMIZE_HORIZONTAL;
      if (window->maximized_vertically ||
          (window->display->grab_resize_unmaximize & META_MAXIMIZE_VERTICAL) != 0)
        new_unmaximize |= META_MAXIMIZE_VERTICAL;
    }

  return new_unmaximize;
}

static gboolean
update_resize_timeout (gpointer data)
{
  MetaWindow *window = data;

  update_resize (window,
                 window->display->grab_last_user_action_was_snap,
                 window->display->grab_latest_motion_x,
                 window->display->grab_latest_motion_y,
                 TRUE);
  return FALSE;
}

static void
update_resize (MetaWindow *window,
               gboolean    snap,
               int x, int y,
               gboolean force)
{
  int dx, dy;
  int new_w, new_h;
  int gravity;
  MetaRectangle old;
  double remaining;
  MetaMaximizeFlags new_unmaximize;

  window->display->grab_latest_motion_x = x;
  window->display->grab_latest_motion_y = y;

  dx = x - window->display->grab_anchor_root_x;
  dy = y - window->display->grab_anchor_root_y;

  /* Attached modal dialogs are special in that size
   * changes apply to both sides, so that the dialog
   * remains centered to the parent.
   */
  if (meta_window_is_attached_dialog (window))
    {
      dx *= 2;
      dy *= 2;
    }

  new_w = window->display->grab_anchor_window_pos.width;
  new_h = window->display->grab_anchor_window_pos.height;

  /* Don't bother doing anything if no move has been specified.  (This
   * happens often, even in keyboard resizing, due to the warping of the
   * pointer.
   */
  if (dx == 0 && dy == 0)
    return;

  if (window->display->grab_op == META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN)
    {
      if ((dx > 0) && (dy > 0))
        {
          window->display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_SE;
          meta_window_update_keyboard_resize (window, TRUE);
        }
      else if ((dx < 0) && (dy > 0))
        {
          window->display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_SW;
          meta_window_update_keyboard_resize (window, TRUE);
        }
      else if ((dx > 0) && (dy < 0))
        {
          window->display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_NE;
          meta_window_update_keyboard_resize (window, TRUE);
        }
      else if ((dx < 0) && (dy < 0))
        {
          window->display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_NW;
          meta_window_update_keyboard_resize (window, TRUE);
        }
      else if (dx < 0)
        {
          window->display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_W;
          meta_window_update_keyboard_resize (window, TRUE);
        }
      else if (dx > 0)
        {
          window->display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_E;
          meta_window_update_keyboard_resize (window, TRUE);
        }
      else if (dy > 0)
        {
          window->display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_S;
          meta_window_update_keyboard_resize (window, TRUE);
        }
      else if (dy < 0)
        {
          window->display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_N;
          meta_window_update_keyboard_resize (window, TRUE);
        }
    }

  new_unmaximize = check_resize_unmaximize (window, dx, dy);

  switch (window->display->grab_op)
    {
    case META_GRAB_OP_RESIZING_SE:
    case META_GRAB_OP_RESIZING_NE:
    case META_GRAB_OP_RESIZING_E:
    case META_GRAB_OP_KEYBOARD_RESIZING_SE:
    case META_GRAB_OP_KEYBOARD_RESIZING_NE:
    case META_GRAB_OP_KEYBOARD_RESIZING_E:
      new_w += dx;
      break;

    case META_GRAB_OP_RESIZING_NW:
    case META_GRAB_OP_RESIZING_SW:
    case META_GRAB_OP_RESIZING_W:
    case META_GRAB_OP_KEYBOARD_RESIZING_NW:
    case META_GRAB_OP_KEYBOARD_RESIZING_SW:
    case META_GRAB_OP_KEYBOARD_RESIZING_W:
      new_w -= dx;
      break;
	default:
	  break;
	}

  switch (window->display->grab_op)
    {
    case META_GRAB_OP_RESIZING_SE:
    case META_GRAB_OP_RESIZING_S:
    case META_GRAB_OP_RESIZING_SW:
    case META_GRAB_OP_KEYBOARD_RESIZING_SE:
    case META_GRAB_OP_KEYBOARD_RESIZING_S:
    case META_GRAB_OP_KEYBOARD_RESIZING_SW:
      new_h += dy;
      break;

    case META_GRAB_OP_RESIZING_N:
    case META_GRAB_OP_RESIZING_NE:
    case META_GRAB_OP_RESIZING_NW:
    case META_GRAB_OP_KEYBOARD_RESIZING_N:
    case META_GRAB_OP_KEYBOARD_RESIZING_NE:
    case META_GRAB_OP_KEYBOARD_RESIZING_NW:
      new_h -= dy;
      break;
    default:
      break;
    }

  if (!check_moveresize_frequency (window, &remaining) && !force)
    {
      /* we are ignoring an event here, so we schedule a
       * compensation event when we would otherwise not ignore
       * an event. Otherwise we can become stuck if the user never
       * generates another event.
       */
      if (!window->display->grab_resize_timeout_id)
	{
	  window->display->grab_resize_timeout_id =
	    g_timeout_add ((int)remaining, update_resize_timeout, window);
	}

      return;
    }

  /* If we get here, it means the client should have redrawn itself */
  if (window->display->compositor)
    meta_compositor_set_updates (window->display->compositor, window, TRUE);

  /* Remove any scheduled compensation events */
  if (window->display->grab_resize_timeout_id)
    {
      g_source_remove (window->display->grab_resize_timeout_id);
      window->display->grab_resize_timeout_id = 0;
    }

  old = window->rect;  /* Don't actually care about x,y */

  /* One sided resizing ought to actually be one-sided, despite the fact that
   * aspect ratio windows don't interact nicely with the above stuff.  So,
   * to avoid some nasty flicker, we enforce that.
   */
  switch (window->display->grab_op)
    {
    case META_GRAB_OP_RESIZING_S:
    case META_GRAB_OP_RESIZING_N:
      new_w = old.width;
      break;

    case META_GRAB_OP_RESIZING_E:
    case META_GRAB_OP_RESIZING_W:
      new_h = old.height;
      break;

    default:
      break;
    }

  /* compute gravity of client during operation */
  gravity = meta_resize_gravity_from_grab_op (window->display->grab_op);
  g_assert (gravity >= 0);

  /* Do any edge resistance/snapping */
  meta_window_edge_resistance_for_resize (window,
                                          old.width,
                                          old.height,
                                          &new_w,
                                          &new_h,
                                          gravity,
                                          update_resize_timeout,
                                          snap,
                                          FALSE);

  if (new_unmaximize == window->display->grab_resize_unmaximize)
    {
      /* We don't need to update unless the specified width and height
       * are actually different from what we had before.
       */
      if (old.width != new_w || old.height != new_h)
        {
          meta_window_resize_with_gravity (window, TRUE, new_w, new_h, gravity);
        }
    }
  else
    {
      if ((new_unmaximize & ~window->display->grab_resize_unmaximize) != 0)
        {
          meta_window_unmaximize_with_gravity (window,
                                               (new_unmaximize & ~window->display->grab_resize_unmaximize),
                                               new_w, new_h, gravity);
        }

      if ((window->display->grab_resize_unmaximize & ~new_unmaximize))
        {
          MetaRectangle saved_rect = window->saved_rect;
          meta_window_maximize (window,
                                (window->display->grab_resize_unmaximize & ~new_unmaximize));
          window->saved_rect = saved_rect;
        }
    }

  window->display->grab_resize_unmaximize = new_unmaximize;

  /* Store the latest resize time, if we actually resized. */
  if (window->rect.width != old.width || window->rect.height != old.height)
    g_get_current_time (&window->display->grab_last_moveresize_time);
}

typedef struct
{
  Window  window;
  int     count;
  guint32 last_time;
} EventScannerData;

static Bool
find_last_time_predicate (Display  *display,
                          XEvent   *ev,
                          XPointer  arg)
{
  EventScannerData *esd = (void*) arg;
  XIEvent *xev;

  if (ev->type != GenericEvent)
    return False;

  /* We are peeking into events not yet handled by GDK,
   * Allocate cookie events here so we can handle XI2.
   *
   * GDK will handle later these events, and eventually
   * free the cookie data itself.
   */
  XGetEventData (display, &ev->xcookie);
  xev = (XIEvent *) ev->xcookie.data;

  if (xev->evtype != XI_Motion)
    return False;

  if (esd->window != ((XIDeviceEvent *) xev)->event)
    return False;

  esd->count += 1;
  esd->last_time = xev->time;

  return False;
}

static gboolean
check_use_this_motion_notify (MetaWindow *window,
                              XIDeviceEvent *xev)
{
  EventScannerData esd;
  XEvent useless;

  /* This code is copied from Owen's GDK code. */

  if (window->display->grab_motion_notify_time != 0)
    {
      /* == is really the right test, but I'm all for paranoia */
      if (window->display->grab_motion_notify_time <=
          xev->time)
        {
          meta_topic (META_DEBUG_RESIZING,
                      "Arrived at event with time %u (waiting for %u), using it\n",
                      (unsigned int)xev->time,
                      window->display->grab_motion_notify_time);
          window->display->grab_motion_notify_time = 0;
          return TRUE;
        }
      else
        return FALSE; /* haven't reached the saved timestamp yet */
    }

  esd.window = xev->event;
  esd.count = 0;
  esd.last_time = 0;

  /* "useless" isn't filled in because the predicate never returns True */
  XCheckIfEvent (window->display->xdisplay,
                 &useless,
                 find_last_time_predicate,
                 (XPointer) &esd);

  if (esd.count > 0)
    meta_topic (META_DEBUG_RESIZING,
                "Will skip %d motion events and use the event with time %u\n",
                esd.count, (unsigned int) esd.last_time);

  if (esd.last_time == 0)
    return TRUE;
  else
    {
      /* Save this timestamp, and ignore all motion notify
       * until we get to the one with this stamp.
       */
      window->display->grab_motion_notify_time = esd.last_time;
      return FALSE;
    }
}

static void
update_tile_mode (MetaWindow *window)
{
  switch (window->tile_mode)
    {
      case META_TILE_LEFT:
      case META_TILE_RIGHT:
          if (!META_WINDOW_TILED_SIDE_BY_SIDE (window))
              window->tile_mode = META_TILE_NONE;
          break;
      case META_TILE_MAXIMIZED:
          if (!META_WINDOW_MAXIMIZED (window))
              window->tile_mode = META_TILE_NONE;
          break;
    }
}

#ifdef HAVE_XSYNC
void
meta_window_update_sync_request_counter (MetaWindow *window,
                                         guint64     new_counter_value)
{
  if (window->display->grab_op != META_GRAB_OP_NONE &&
      window == window->display->grab_window &&
      meta_grab_op_is_mouse (window->display->grab_op))
    {

      meta_topic (META_DEBUG_RESIZING,
                  "Alarm event received last motion x = %d y = %d\n",
                  window->display->grab_latest_motion_x,
                  window->display->grab_latest_motion_y);

      /* If sync was previously disabled, turn it back on and hope
       * the application has come to its senses (maybe it was just
       * busy with a pagefault or a long computation).
       */
      window->disable_sync = FALSE;
      window->sync_request_time.tv_sec = 0;
      window->sync_request_time.tv_usec = 0;

      /* This means we are ready for another configure. */
      switch (window->display->grab_op)
        {
        case META_GRAB_OP_RESIZING_E:
        case META_GRAB_OP_RESIZING_W:
        case META_GRAB_OP_RESIZING_S:
        case META_GRAB_OP_RESIZING_N:
        case META_GRAB_OP_RESIZING_SE:
        case META_GRAB_OP_RESIZING_SW:
        case META_GRAB_OP_RESIZING_NE:
        case META_GRAB_OP_RESIZING_NW:
        case META_GRAB_OP_KEYBOARD_RESIZING_S:
        case META_GRAB_OP_KEYBOARD_RESIZING_N:
        case META_GRAB_OP_KEYBOARD_RESIZING_W:
        case META_GRAB_OP_KEYBOARD_RESIZING_E:
        case META_GRAB_OP_KEYBOARD_RESIZING_SE:
        case META_GRAB_OP_KEYBOARD_RESIZING_NE:
        case META_GRAB_OP_KEYBOARD_RESIZING_SW:
        case META_GRAB_OP_KEYBOARD_RESIZING_NW:
          /* no pointer round trip here, to keep in sync */
          update_resize (window,
                         window->display->grab_last_user_action_was_snap,
                         window->display->grab_latest_motion_x,
                         window->display->grab_latest_motion_y,
                         TRUE);
          break;

        default:
          break;
        }
    }
}
#endif /* HAVE_XSYNC */

void
meta_window_handle_mouse_grab_op_event (MetaWindow *window,
                                        XIDeviceEvent *xev)
{
  switch (xev->evtype)
    {
    case XI_ButtonRelease:
      meta_display_check_threshold_reached (window->display,
                                            xev->root_x,
                                            xev->root_y);
      /* If the user was snap moving then ignore the button release
       * because they may have let go of shift before releasing the
       * mouse button and they almost certainly do not want a
       * non-snapped movement to occur from the button release.
       */
      if (!window->display->grab_last_user_action_was_snap)
        {
          if (meta_grab_op_is_moving (window->display->grab_op))
            {
              if (window->tile_mode != META_TILE_NONE)
                meta_window_tile (window);
              else if (xev->root == window->screen->xroot)
                update_move (window,
                             xev->mods.effective & ShiftMask,
                             xev->root_x,
                             xev->root_y);
            }
          else if (meta_grab_op_is_resizing (window->display->grab_op))
            {
              if (xev->root == window->screen->xroot)
                update_resize (window,
                               xev->mods.effective & ShiftMask,
                               xev->root_x,
                               xev->root_y,
                               TRUE);
	      if (window->display->compositor)
		meta_compositor_set_updates (window->display->compositor, window, TRUE);

              /* If a tiled window has been dragged free with a
               * mouse resize without snapping back to the tiled
               * state, it will end up with an inconsistent tile
               * mode on mouse release; cleaning the mode earlier
               * would break the ability to snap back to the tiled
               * state, so we wait until mouse release.
               */
              update_tile_mode (window);
            }
        }

      meta_display_end_grab_op (window->display, xev->time);
      break;

    case XI_Motion:
      meta_display_check_threshold_reached (window->display,
                                            xev->root_x,
                                            xev->root_y);
      if (meta_grab_op_is_moving (window->display->grab_op))
        {
          if (xev->root == window->screen->xroot)
            {
              if (check_use_this_motion_notify (window,
                                                xev))
                update_move (window,
                             xev->mods.effective & ShiftMask,
                             xev->root_x,
                             xev->root_y);
            }
        }
      else if (meta_grab_op_is_resizing (window->display->grab_op))
        {
          if (xev->root == window->screen->xroot)
            {
              if (check_use_this_motion_notify (window,
                                                xev))
                update_resize (window,
                               xev->mods.effective & ShiftMask,
                               xev->root_x,
                               xev->root_y,
                               FALSE);
            }
        }
      break;

    default:
      break;
    }
}

void
meta_window_set_gravity (MetaWindow *window,
                         int         gravity)
{
  XSetWindowAttributes attrs;

  meta_verbose ("Setting gravity of %s to %d\n", window->desc, gravity);

  attrs.win_gravity = gravity;

  meta_error_trap_push (window->display);

  XChangeWindowAttributes (window->display->xdisplay,
                           window->xwindow,
                           CWWinGravity,
                           &attrs);

  meta_error_trap_pop (window->display);
}

static void
get_work_area_monitor (MetaWindow    *window,
                       MetaRectangle *area,
                       int            which_monitor)
{
  GList *tmp;

  g_assert (which_monitor >= 0);

  /* Initialize to the whole monitor */
  *area = window->screen->monitor_infos[which_monitor].rect;

  tmp = meta_window_get_workspaces (window);
  while (tmp != NULL)
    {
      MetaRectangle workspace_work_area;
      meta_workspace_get_work_area_for_monitor (tmp->data,
                                                which_monitor,
                                                &workspace_work_area);
      meta_rectangle_intersect (area,
                                &workspace_work_area,
                                area);
      tmp = tmp->next;
    }

  meta_topic (META_DEBUG_WORKAREA,
              "Window %s monitor %d has work area %d,%d %d x %d\n",
              window->desc, which_monitor,
              area->x, area->y, area->width, area->height);
}

void
meta_window_get_work_area_current_monitor (MetaWindow    *window,
                                           MetaRectangle *area)
{
  const MetaMonitorInfo *monitor = NULL;
  monitor = meta_screen_get_monitor_for_window (window->screen,
                                                window);

  meta_window_get_work_area_for_monitor (window,
                                         monitor->number,
                                         area);
}

void
meta_window_get_work_area_for_monitor (MetaWindow    *window,
                                       int            which_monitor,
                                       MetaRectangle *area)
{
  g_return_if_fail (which_monitor >= 0);

  get_work_area_monitor (window,
                         area,
                         which_monitor);
}

void
meta_window_get_work_area_all_monitors (MetaWindow    *window,
                                        MetaRectangle *area)
{
  GList *tmp;

  /* Initialize to the whole screen */
  *area = window->screen->rect;

  tmp = meta_window_get_workspaces (window);
  while (tmp != NULL)
    {
      MetaRectangle workspace_work_area;
      meta_workspace_get_work_area_all_monitors (tmp->data,
                                                 &workspace_work_area);
      meta_rectangle_intersect (area,
                                &workspace_work_area,
                                area);
      tmp = tmp->next;
    }

  meta_topic (META_DEBUG_WORKAREA,
              "Window %s has whole-screen work area %d,%d %d x %d\n",
              window->desc, area->x, area->y, area->width, area->height);
}

void
meta_window_get_current_tile_area (MetaWindow    *window,
                                   MetaRectangle *tile_area)
{
  int tile_monitor_number;

  g_return_if_fail (window->tile_mode != META_TILE_NONE);

  tile_monitor_number = window->tile_monitor_number;
  if (tile_monitor_number < 0)
    {
      meta_warning ("%s called with an invalid monitor number; using 0 instead\n", G_STRFUNC);
      tile_monitor_number = 0;
    }

  meta_window_get_work_area_for_monitor (window, tile_monitor_number, tile_area);

  if (window->tile_mode == META_TILE_LEFT  ||
      window->tile_mode == META_TILE_RIGHT)
    tile_area->width /= 2;

  if (window->tile_mode == META_TILE_RIGHT)
    tile_area->x += tile_area->width;
}

gboolean
meta_window_same_application (MetaWindow *window,
                              MetaWindow *other_window)
{
  MetaGroup *group       = meta_window_get_group (window);
  MetaGroup *other_group = meta_window_get_group (other_window);

  return
    group!=NULL &&
    other_group!=NULL &&
    group==other_group;
}

/* Generally meta_window_same_application() is a better idea
 * of "sameness", since it handles the case where multiple apps
 * want to look like the same app or the same app wants to look
 * like multiple apps, but in the case of workarounds for legacy
 * applications (which likely aren't setting the group properly
 * anyways), it may be desirable to check this as well.
 */
static gboolean
meta_window_same_client (MetaWindow *window,
                         MetaWindow *other_window)
{
  int resource_mask = window->display->xdisplay->resource_mask;

  return ((window->xwindow & ~resource_mask) ==
          (other_window->xwindow & ~resource_mask));
}

void
meta_window_refresh_resize_popup (MetaWindow *window)
{
  if (window->display->grab_op == META_GRAB_OP_NONE)
    return;

  if (window->display->grab_window != window)
    return;

  switch (window->display->grab_op)
    {
    case META_GRAB_OP_RESIZING_SE:
    case META_GRAB_OP_RESIZING_S:
    case META_GRAB_OP_RESIZING_SW:
    case META_GRAB_OP_RESIZING_N:
    case META_GRAB_OP_RESIZING_NE:
    case META_GRAB_OP_RESIZING_NW:
    case META_GRAB_OP_RESIZING_W:
    case META_GRAB_OP_RESIZING_E:
    case META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN:
    case META_GRAB_OP_KEYBOARD_RESIZING_S:
    case META_GRAB_OP_KEYBOARD_RESIZING_N:
    case META_GRAB_OP_KEYBOARD_RESIZING_W:
    case META_GRAB_OP_KEYBOARD_RESIZING_E:
    case META_GRAB_OP_KEYBOARD_RESIZING_SE:
    case META_GRAB_OP_KEYBOARD_RESIZING_NE:
    case META_GRAB_OP_KEYBOARD_RESIZING_SW:
    case META_GRAB_OP_KEYBOARD_RESIZING_NW:
      break;

    default:
      /* Not resizing */
      return;
    }

  if (window->display->grab_resize_popup == NULL)
    {
      if (window->size_hints.width_inc > 1 ||
          window->size_hints.height_inc > 1)
        window->display->grab_resize_popup =
          meta_ui_resize_popup_new (window->display->xdisplay,
                                    window->screen->number);
    }

  if (window->display->grab_resize_popup != NULL)
    {
      MetaRectangle rect;

      meta_window_get_client_root_coords (window, &rect);

      meta_ui_resize_popup_set (window->display->grab_resize_popup,
                                rect,
                                window->size_hints.base_width,
                                window->size_hints.base_height,
                                window->size_hints.width_inc,
                                window->size_hints.height_inc);

      meta_ui_resize_popup_set_showing (window->display->grab_resize_popup,
                                        TRUE);
    }
}

/**
 * meta_window_foreach_transient:
 * @window: a #MetaWindow
 * @func: (scope call) (closure user_data): Called for each window which is a transient of @window (transitively)
 * @user_data: User data
 *
 * Call @func for every window which is either transient for @window, or is
 * a transient of a window which is in turn transient for @window.
 * The order of window enumeration is not defined.
 *
 * Iteration will stop if @func at any point returns %FALSE.
 */
void
meta_window_foreach_transient (MetaWindow            *window,
                               MetaWindowForeachFunc  func,
                               void                  *user_data)
{
  GSList *windows;
  GSList *tmp;

  windows = meta_display_list_windows (window->display, META_LIST_DEFAULT);

  tmp = windows;
  while (tmp != NULL)
    {
      MetaWindow *transient = tmp->data;

      if (meta_window_is_ancestor_of_transient (window, transient))
        {
          if (!(* func) (transient, user_data))
            break;
        }

      tmp = tmp->next;
    }

  g_slist_free (windows);
}

/**
 * meta_window_foreach_ancestor:
 * @window: a #MetaWindow
 * @func: (scope call) (closure user_data): Called for each window which is a transient parent of @window
 * @user_data: User data
 *
 * If @window is transient, call @func with the window for which it's transient,
 * repeatedly until either we find a non-transient window, or @func returns %FALSE.
 */
void
meta_window_foreach_ancestor (MetaWindow            *window,
                              MetaWindowForeachFunc  func,
                              void                  *user_data)
{
  MetaWindow *w;

  w = window;
  do
    {
      if (w->xtransient_for == None ||
          w->transient_parent_is_root_window)
        break;

      w = meta_display_lookup_x_window (w->display, w->xtransient_for);
    }
  while (w && (* func) (w, user_data));
}

typedef struct
{
  MetaWindow *ancestor;
  gboolean found;
} FindAncestorData;

static gboolean
find_ancestor_func (MetaWindow *window,
                    void       *data)
{
  FindAncestorData *d = data;

  if (window == d->ancestor)
    {
      d->found = TRUE;
      return FALSE;
    }

  return TRUE;
}

/**
 * meta_window_is_ancestor_of_transient:
 * @window: a #MetaWindow
 * @transient: a #MetaWindow
 *
 * The function determines whether @window is an ancestor of @transient; it does
 * so by traversing the @transient's ancestors until it either locates @window
 * or reaches an ancestor that is not transient.
 *
 * Return Value: (transfer none): %TRUE if window is an ancestor of transient.
 */
gboolean
meta_window_is_ancestor_of_transient (MetaWindow *window,
                                      MetaWindow *transient)
{
  FindAncestorData d;

  d.ancestor = window;
  d.found = FALSE;

  meta_window_foreach_ancestor (transient, find_ancestor_func, &d);

  return d.found;
}

/* Warp pointer to location appropriate for grab,
 * return root coordinates where pointer ended up.
 */
static gboolean
warp_grab_pointer (MetaWindow          *window,
                   MetaGrabOp           grab_op,
                   int                 *x,
                   int                 *y)
{
  MetaRectangle  rect;
  MetaDisplay   *display;

  display = window->display;

  /* We may not have done begin_grab_op yet, i.e. may not be in a grab
   */

  meta_window_get_outer_rect (window, &rect);

  switch (grab_op)
    {
      case META_GRAB_OP_KEYBOARD_MOVING:
      case META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN:
        *x = rect.width / 2;
        *y = rect.height / 2;
        break;

      case META_GRAB_OP_KEYBOARD_RESIZING_S:
        *x = rect.width / 2;
        *y = rect.height - 1;
        break;

      case META_GRAB_OP_KEYBOARD_RESIZING_N:
        *x = rect.width / 2;
        *y = 0;
        break;

      case META_GRAB_OP_KEYBOARD_RESIZING_W:
        *x = 0;
        *y = rect.height / 2;
        break;

      case META_GRAB_OP_KEYBOARD_RESIZING_E:
        *x = rect.width - 1;
        *y = rect.height / 2;
        break;

      case META_GRAB_OP_KEYBOARD_RESIZING_SE:
        *x = rect.width - 1;
        *y = rect.height - 1;
        break;

      case META_GRAB_OP_KEYBOARD_RESIZING_NE:
        *x = rect.width - 1;
        *y = 0;
        break;

      case META_GRAB_OP_KEYBOARD_RESIZING_SW:
        *x = 0;
        *y = rect.height - 1;
        break;

      case META_GRAB_OP_KEYBOARD_RESIZING_NW:
        *x = 0;
        *y = 0;
        break;

      default:
        return FALSE;
    }

  *x += rect.x;
  *y += rect.y;

  /* Avoid weird bouncing at the screen edge; see bug 154706 */
  *x = CLAMP (*x, 0, window->screen->rect.width-1);
  *y = CLAMP (*y, 0, window->screen->rect.height-1);

  meta_error_trap_push_with_return (display);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Warping pointer to %d,%d with window at %d,%d\n",
              *x, *y, rect.x, rect.y);

  /* Need to update the grab positions so that the MotionNotify and other
   * events generated by the XWarpPointer() call below don't cause complete
   * funkiness.  See bug 124582 and bug 122670.
   */
  display->grab_anchor_root_x = *x;
  display->grab_anchor_root_y = *y;
  display->grab_latest_motion_x = *x;
  display->grab_latest_motion_y = *y;
  meta_window_get_client_root_coords (window,
                                      &display->grab_anchor_window_pos);

  XWarpPointer (display->xdisplay,
                None,
                window->screen->xroot,
                0, 0, 0, 0,
                *x, *y);

  if (meta_error_trap_pop_with_return (display) != Success)
    {
      meta_verbose ("Failed to warp pointer for window %s\n",
                    window->desc);
      return FALSE;
    }

  return TRUE;
}

void
meta_window_begin_grab_op (MetaWindow *window,
                           MetaGrabOp  op,
                           gboolean    frame_action,
                           guint32     timestamp)
{
  int x, y;

  warp_grab_pointer (window,
                     op, &x, &y);

  meta_display_begin_grab_op (window->display,
                              window->screen,
                              window,
                              op,
                              FALSE,
                              frame_action,
                              0 /* button */,
                              0,
                              timestamp,
                              x, y);
}

void
meta_window_update_keyboard_resize (MetaWindow *window,
                                    gboolean    update_cursor)
{
  int x, y;

  warp_grab_pointer (window,
                     window->display->grab_op,
                     &x, &y);

  if (update_cursor)
    {
      guint32 timestamp;
      /* FIXME: Using CurrentTime is really bad mojo */
      timestamp = CurrentTime;
      meta_display_set_grab_op_cursor (window->display,
                                       NULL,
                                       window->display->grab_op,
                                       TRUE,
                                       window->display->grab_xwindow,
                                       timestamp);
    }
}

void
meta_window_update_keyboard_move (MetaWindow *window)
{
  int x, y;

  warp_grab_pointer (window,
                     window->display->grab_op,
                     &x, &y);
}

void
meta_window_update_layer (MetaWindow *window)
{
  MetaGroup *group;

  meta_stack_freeze (window->screen->stack);
  group = meta_window_get_group (window);
  if (group)
    meta_group_update_layers (group);
  else
    meta_stack_update_layer (window->screen->stack, window);
  meta_stack_thaw (window->screen->stack);
}

/* ensure_mru_position_after ensures that window appears after
 * below_this_one in the active_workspace's mru_list (i.e. it treats
 * window as having been less recently used than below_this_one)
 */
static void
ensure_mru_position_after (MetaWindow *window,
                           MetaWindow *after_this_one)
{
  /* This is sort of slow since it runs through the entire list more
   * than once (especially considering the fact that we expect the
   * windows of interest to be the first two elements in the list),
   * but it doesn't matter while we're only using it on new window
   * map.
   */

  GList* active_mru_list;
  GList* window_position;
  GList* after_this_one_position;

  active_mru_list         = window->screen->active_workspace->mru_list;
  window_position         = g_list_find (active_mru_list, window);
  after_this_one_position = g_list_find (active_mru_list, after_this_one);

  /* after_this_one_position is NULL when we switch workspaces, but in
   * that case we don't need to do any MRU shuffling so we can simply
   * return.
   */
  if (after_this_one_position == NULL)
    return;

  if (g_list_length (window_position) > g_list_length (after_this_one_position))
    {
      window->screen->active_workspace->mru_list =
        g_list_delete_link (window->screen->active_workspace->mru_list,
                            window_position);

      window->screen->active_workspace->mru_list =
        g_list_insert_before (window->screen->active_workspace->mru_list,
                              after_this_one_position->next,
                              window);
    }
}

void
meta_window_stack_just_below (MetaWindow *window,
                              MetaWindow *below_this_one)
{
  g_return_if_fail (window         != NULL);
  g_return_if_fail (below_this_one != NULL);

  if (window->stack_position > below_this_one->stack_position)
    {
      meta_topic (META_DEBUG_STACK,
                  "Setting stack position of window %s to %d (making it below window %s).\n",
                  window->desc,
                  below_this_one->stack_position,
                  below_this_one->desc);
      meta_window_set_stack_position (window, below_this_one->stack_position);
    }
  else
    {
      meta_topic (META_DEBUG_STACK,
                  "Window %s  was already below window %s.\n",
                  window->desc, below_this_one->desc);
    }
}

/**
 * meta_window_get_user_time:
 *
 * The user time represents a timestamp for the last time the user
 * interacted with this window.  Note this property is only available
 * for non-override-redirect windows.
 *
 * The property is set by Mutter initially upon window creation,
 * and updated thereafter on input events (key and button presses) seen by Mutter,
 * client updates to the _NET_WM_USER_TIME property (if later than the current time)
 * and when focusing the window.
 *
 * Returns: The last time the user interacted with this window.
 */
guint32
meta_window_get_user_time (MetaWindow *window)
{
  return window->net_wm_user_time;
}

void
meta_window_set_user_time (MetaWindow *window,
                           guint32     timestamp)
{
  /* FIXME: If Soeren's suggestion in bug 151984 is implemented, it will allow
   * us to sanity check the timestamp here and ensure it doesn't correspond to
   * a future time.
   */

  g_return_if_fail (!window->override_redirect);

  /* Only update the time if this timestamp is newer... */
  if (window->net_wm_user_time_set &&
      XSERVER_TIME_IS_BEFORE (timestamp, window->net_wm_user_time))
    {
      meta_topic (META_DEBUG_STARTUP,
                  "Window %s _NET_WM_USER_TIME not updated to %u, because it "
                  "is less than %u\n",
                  window->desc, timestamp, window->net_wm_user_time);
    }
  else
    {
      meta_topic (META_DEBUG_STARTUP,
                  "Window %s has _NET_WM_USER_TIME of %u\n",
                  window->desc, timestamp);
      window->net_wm_user_time_set = TRUE;
      window->net_wm_user_time = timestamp;
      if (XSERVER_TIME_IS_BEFORE (window->display->last_user_time, timestamp))
        window->display->last_user_time = timestamp;

      /* If this is a terminal, user interaction with it means the user likely
       * doesn't want to have focus transferred for now due to new windows.
       */
      if (meta_prefs_get_focus_new_windows () ==
               G_DESKTOP_FOCUS_NEW_WINDOWS_STRICT &&
          __window_is_terminal (window))
        window->display->allow_terminal_deactivation = FALSE;
    }

  g_object_notify (G_OBJECT (window), "user-time");
}

/**
 * meta_window_get_stable_sequence:
 * @window: A #MetaWindow
 *
 * The stable sequence number is a monotonicially increasing
 * unique integer assigned to each #MetaWindow upon creation.
 *
 * This number can be useful for sorting windows in a stable
 * fashion.
 *
 * Returns: Internal sequence number for this window
 */
guint32
meta_window_get_stable_sequence (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), 0);

  return window->stable_sequence;
}

/* Sets the demands_attention hint on a window, but only
 * if it's at least partially obscured (see #305882).
 */
void
meta_window_set_demands_attention (MetaWindow *window)
{
  MetaRectangle candidate_rect, other_rect;
  GList *stack = window->screen->stack->sorted;
  MetaWindow *other_window;
  gboolean obscured = FALSE;

  MetaWorkspace *workspace = window->screen->active_workspace;

  if (window->wm_state_demands_attention)
    return;

  if (workspace!=window->workspace)
    {
      /* windows on other workspaces are necessarily obscured */
      obscured = TRUE;
    }
  else if (window->minimized)
    {
      obscured = TRUE;
    }
  else
    {
      meta_window_get_outer_rect (window, &candidate_rect);

      /* The stack is sorted with the top windows first. */

      while (stack != NULL && stack->data != window)
        {
          other_window = stack->data;
          stack = stack->next;

          if (other_window->on_all_workspaces ||
              window->on_all_workspaces ||
              other_window->workspace == window->workspace)
            {
              meta_window_get_outer_rect (other_window, &other_rect);

              if (meta_rectangle_overlap (&candidate_rect, &other_rect))
                {
                  obscured = TRUE;
                  break;
                }
            }
        }
    }

  if (obscured)
    {
      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Marking %s as needing attention\n",
                  window->desc);

      window->wm_state_demands_attention = TRUE;
      set_net_wm_state (window);
      g_object_notify (G_OBJECT (window), "demands-attention");
      g_signal_emit_by_name (window->display, "window-demands-attention",
                             window);
    }
  else
    {
      /* If the window's in full view, there's no point setting the flag. */

      meta_topic (META_DEBUG_WINDOW_OPS,
                 "Not marking %s as needing attention because "
                 "it's in full view\n",
                 window->desc);
    }
}

void
meta_window_unset_demands_attention (MetaWindow *window)
{
  meta_topic (META_DEBUG_WINDOW_OPS,
      "Marking %s as not needing attention\n", window->desc);

  if (window->wm_state_demands_attention)
    {
      window->wm_state_demands_attention = FALSE;
      set_net_wm_state (window);
      g_object_notify (G_OBJECT (window), "demands-attention");
    }
}

/**
 * meta_window_get_frame: (skip)
 *
 */
MetaFrame *
meta_window_get_frame (MetaWindow *window)
{
  return window->frame;
}

/**
 * meta_window_appears_focused:
 * @window: a #MetaWindow
 *
 * Determines if the window should be drawn with a focused appearance. This is
 * true for focused windows but also true for windows with a focused modal
 * dialog attached.
 *
 * Return value: %TRUE if the window should be drawn with a focused frame
 */
gboolean
meta_window_appears_focused (MetaWindow *window)
{
  return window->has_focus || (window->attached_focus_window != NULL);
}

gboolean
meta_window_has_focus (MetaWindow *window)
{
  return window->has_focus;
}

gboolean
meta_window_is_shaded (MetaWindow *window)
{
  return window->shaded;
}

/**
 * meta_window_is_override_redirect:
 * @window: A #MetaWindow
 *
 * Returns if this window isn't managed by mutter; it will
 * control its own positioning and mutter won't draw decorations
 * among other things.  In X terminology this is "override redirect".
 */
gboolean
meta_window_is_override_redirect (MetaWindow *window)
{
  return window->override_redirect;
}

/**
 * meta_window_is_skip_taskbar:
 * @window: A #MetaWindow
 *
 * Gets whether this window should be ignored by task lists.
 *
 * Return value: %TRUE if the skip bar hint is set.
 */
gboolean
meta_window_is_skip_taskbar (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), FALSE);

  return window->skip_taskbar;
}

/**
 * meta_window_get_rect:
 * @window: a #MetaWindow
 *
 * Gets the rectangle that bounds @window, ignoring any window decorations.
 *
 * Return value: (transfer none): the #MetaRectangle for the window
 */
MetaRectangle *
meta_window_get_rect (MetaWindow *window)
{
  return &window->rect;
}

/**
 * meta_window_get_screen:
 * @window: a #MetaWindow
 *
 * Gets the #MetaScreen that the window is on.
 *
 * Return value: (transfer none): the #MetaScreen for the window
 */
MetaScreen *
meta_window_get_screen (MetaWindow *window)
{
  return window->screen;
}

/**
 * meta_window_get_display:
 * @window: A #MetaWindow
 *
 * Returns: (transfer none): The display for @window
 */
MetaDisplay *
meta_window_get_display (MetaWindow *window)
{
  return window->display;
}

/**
 * meta_window_get_xwindow: (skip)
 *
 */
Window
meta_window_get_xwindow (MetaWindow *window)
{
  return window->xwindow;
}

MetaWindowType
meta_window_get_window_type (MetaWindow *window)
{
  return window->type;
}

/**
 * meta_window_get_window_type_atom: (skip)
 * @window: a #MetaWindow
 *
 * Gets the X atom from the _NET_WM_WINDOW_TYPE property used by the
 * application to set the window type. (Note that this is constrained
 * to be some value that Mutter recognizes - a completely unrecognized
 * type atom will be returned as None.)
 *
 * Return value: the raw X atom for the window type, or None
 */
Atom
meta_window_get_window_type_atom (MetaWindow *window)
{
  return window->type_atom;
}

/**
 * meta_window_get_workspace:
 * @window: a #MetaWindow
 *
 * Gets the #MetaWorkspace that the window is currently displayed on.
 * If the window is on all workspaces, returns the currently active
 * workspace.
 *
 * Return value: (transfer none): the #MetaWorkspace for the window
 */
MetaWorkspace *
meta_window_get_workspace (MetaWindow *window)
{
  if (window->on_all_workspaces)
    return window->screen->active_workspace;

  return window->workspace;
}

gboolean
meta_window_is_on_all_workspaces (MetaWindow *window)
{
  return window->on_all_workspaces;
}

gboolean
meta_window_is_hidden (MetaWindow *window)
{
  return window->hidden;
}

const char *
meta_window_get_description (MetaWindow *window)
{
  if (!window)
    return NULL;

  return window->desc;
}

/**
 * meta_window_get_wm_class:
 * @window: a #MetaWindow
 *
 * Return the current value of the name part of WM_CLASS X property.
 */
const char *
meta_window_get_wm_class (MetaWindow *window)
{
  if (!window)
    return NULL;

  return window->res_class;
}

/**
 * meta_window_get_wm_class_instance:
 * @window: a #MetaWindow
 *
 * Return the current value of the instance part of WM_CLASS X property.
 */
const char *
meta_window_get_wm_class_instance (MetaWindow *window)
{
  if (!window)
    return NULL;

  return window->res_name;
}

/**
 * meta_window_get_gtk_application_id:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the application ID
 **/
const char *
meta_window_get_gtk_application_id (MetaWindow *window)
{
  return window->gtk_application_id;
}

/**
 * meta_window_get_gtk_unique_bus_name:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the unique name
 **/
const char *
meta_window_get_gtk_unique_bus_name (MetaWindow *window)
{
  return window->gtk_unique_bus_name;
}

/**
 * meta_window_get_gtk_application_object_path:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the object path
 **/
const char *
meta_window_get_gtk_application_object_path (MetaWindow *window)
{
  return window->gtk_application_object_path;
}

/**
 * meta_window_get_gtk_window_object_path:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the object path
 **/
const char *
meta_window_get_gtk_window_object_path (MetaWindow *window)
{
  return window->gtk_window_object_path;
}

/**
 * meta_window_get_gtk_app_menu_object_path:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the object path
 **/
const char *
meta_window_get_gtk_app_menu_object_path (MetaWindow *window)
{
  return window->gtk_app_menu_object_path;
}

/**
 * meta_window_get_gtk_menubar_object_path:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the object path
 **/
const char *
meta_window_get_gtk_menubar_object_path (MetaWindow *window)
{
  return window->gtk_menubar_object_path;
}

/**
 * meta_window_get_compositor_private:
 * @window: a #MetaWindow
 *
 * Gets the compositor's wrapper object for @window.
 *
 * Return value: (transfer none): the wrapper object.
 **/
GObject *
meta_window_get_compositor_private (MetaWindow *window)
{
  if (!window)
    return NULL;
  return window->compositor_private;
}

void
meta_window_set_compositor_private (MetaWindow *window, GObject *priv)
{
  if (!window)
    return;
  window->compositor_private = priv;
}

const char *
meta_window_get_role (MetaWindow *window)
{
  if (!window)
    return NULL;

  return window->role;
}

/**
 * meta_window_get_title:
 * @window: a #MetaWindow
 *
 * Returns the current title of the window.
 */
const char *
meta_window_get_title (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), NULL);

  return window->title;
}

MetaStackLayer
meta_window_get_layer (MetaWindow *window)
{
  return window->layer;
}

/**
 * meta_window_get_transient_for:
 * @window: a #MetaWindow
 *
 * Returns the #MetaWindow for the window that is pointed to by the
 * WM_TRANSIENT_FOR hint on this window (see XGetTransientForHint()
 * or XSetTransientForHint()). Metacity keeps transient windows above their
 * parents. A typical usage of this hint is for a dialog that wants to stay
 * above its associated window.
 *
 * Return value: (transfer none): the window this window is transient for, or
 * %NULL if the WM_TRANSIENT_FOR hint is unset or does not point to a toplevel
 * window that Metacity knows about.
 */
MetaWindow *
meta_window_get_transient_for (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), NULL);

  if (window->xtransient_for)
    return meta_display_lookup_x_window (window->display,
                                         window->xtransient_for);
  else
    return NULL;
}

/**
 * meta_window_get_transient_for_as_xid:
 * @window: a #MetaWindow
 *
 * Returns the XID of the window that is pointed to by the
 * WM_TRANSIENT_FOR hint on this window (see XGetTransientForHint()
 * or XSetTransientForHint()). Metacity keeps transient windows above their
 * parents. A typical usage of this hint is for a dialog that wants to stay
 * above its associated window.
 *
 * Return value: (transfer none): the window this window is transient for, or
 * None if the WM_TRANSIENT_FOR hint is unset.
 */
Window
meta_window_get_transient_for_as_xid (MetaWindow *window)
{
  return window->xtransient_for;
}

/**
 * meta_window_get_pid:
 * @window: a #MetaWindow
 *
 * Returns pid of the process that created this window, if known (obtained from
 * the _NET_WM_PID property).
 *
 * Return value: (transfer none): the pid, or -1 if not known.
 */
int
meta_window_get_pid (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), -1);

  return window->net_wm_pid;
}

/**
 * meta_window_get_client_machine:
 * @window: a #MetaWindow
 *
 * Returns name of the client machine from which this windows was created,
 * if known (obtained from the WM_CLIENT_MACHINE property).
 *
 * Return value: (transfer none): the machine name, or NULL; the string is
 * owned by the window manager and should not be freed or modified by the
 * caller.
 */
const char *
meta_window_get_client_machine (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), NULL);

  return window->wm_client_machine;
}

/**
 * meta_window_is_remote:
 * @window: a #MetaWindow
 *
 * Returns: %TRUE if this window originates from a host
 * different from the one running mutter.
 */
gboolean
meta_window_is_remote (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), FALSE);

  if (window->wm_client_machine != NULL)
    return g_strcmp0 (window->wm_client_machine, window->display->hostname) != 0;
  return FALSE;
}

/**
 * meta_window_is_modal:
 * @window: a #MetaWindow
 *
 * Queries whether the window is in a modal state as described by the
 * _NET_WM_STATE protocol.
 *
 * Return value: (transfer none): TRUE if the window is in modal state.
 */
gboolean
meta_window_is_modal (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), FALSE);

  return window->wm_state_modal;
}

/**
 * meta_window_get_mutter_hints:
 * @window: a #MetaWindow
 *
 * Gets the current value of the _MUTTER_HINTS property.
 *
 * The purpose of the hints is to allow fine-tuning of the Window Manager and
 * Compositor behaviour on per-window basis, and is intended primarily for
 * hints that are plugin-specific.
 *
 * The property is a list of colon-separated key=value pairs. The key names for
 * any plugin-specific hints must be suitably namespaced to allow for shared
 * use; 'mutter-' key prefix is reserved for internal use, and must not be used
 * by plugins.
 *
 * Return value: (transfer none): the _MUTTER_HINTS string, or %NULL if no hints
 * are set.
 */
const char *
meta_window_get_mutter_hints (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), NULL);

  return window->mutter_hints;
}

/**
 * meta_window_get_frame_type:
 * @window: a #MetaWindow
 *
 * Gets the type of window decorations that should be used for this window.
 *
 * Return value: the frame type
 */
MetaFrameType
meta_window_get_frame_type (MetaWindow *window)
{
  MetaFrameType base_type = META_FRAME_TYPE_LAST;

  switch (window->type)
    {
    case META_WINDOW_NORMAL:
      base_type = META_FRAME_TYPE_NORMAL;
      break;

    case META_WINDOW_DIALOG:
      base_type = META_FRAME_TYPE_DIALOG;
      break;

    case META_WINDOW_MODAL_DIALOG:
      if (meta_window_is_attached_dialog (window))
        base_type = META_FRAME_TYPE_ATTACHED;
      else
        base_type = META_FRAME_TYPE_MODAL_DIALOG;
      break;

    case META_WINDOW_MENU:
      base_type = META_FRAME_TYPE_MENU;
      break;

    case META_WINDOW_UTILITY:
      base_type = META_FRAME_TYPE_UTILITY;
      break;

    case META_WINDOW_DESKTOP:
    case META_WINDOW_DOCK:
    case META_WINDOW_TOOLBAR:
    case META_WINDOW_SPLASHSCREEN:
    case META_WINDOW_DROPDOWN_MENU:
    case META_WINDOW_POPUP_MENU:
    case META_WINDOW_TOOLTIP:
    case META_WINDOW_NOTIFICATION:
    case META_WINDOW_COMBO:
    case META_WINDOW_DND:
    case META_WINDOW_OVERRIDE_OTHER:
      /* No frame */
      base_type = META_FRAME_TYPE_LAST;
      break;
    }

  if (base_type == META_FRAME_TYPE_LAST)
    {
      /* can't add border if undecorated */
      return META_FRAME_TYPE_LAST;
    }
  else if ((window->border_only && base_type != META_FRAME_TYPE_ATTACHED) ||
           (window->hide_titlebar_when_maximized && META_WINDOW_MAXIMIZED (window)) ||
           (window->hide_titlebar_when_maximized && META_WINDOW_TILED_SIDE_BY_SIDE (window)))
    {
      /* override base frame type */
      return META_FRAME_TYPE_BORDER;
    }
  else
    {
      return base_type;
    }
}

/**
 * meta_window_get_frame_bounds:
 *
 * Gets a region representing the outer bounds of the window's frame.
 *
 * Return value: (transfer none) (allow-none): a #cairo_region_t
 *  holding the outer bounds of the window, or %NULL if the window
 *  doesn't have a frame.
 */
cairo_region_t *
meta_window_get_frame_bounds (MetaWindow *window)
{
  if (!window->frame_bounds)
    {
      if (window->frame)
        window->frame_bounds = meta_frame_get_frame_bounds (window->frame);
    }

  return window->frame_bounds;
}

/**
 * meta_window_is_attached_dialog:
 * @window: a #MetaWindow
 *
 * Tests if @window is should be attached to its parent window.
 * (If the "attach_modal_dialogs" option is not enabled, this will
 * always return %FALSE.)
 *
 * Return value: whether @window should be attached to its parent
 */
gboolean
meta_window_is_attached_dialog (MetaWindow *window)
{
  return window->attached;
}

/**
 * meta_window_get_tile_match:
 *
 * Returns the matching tiled window on the same monitor as @window. This is
 * the topmost tiled window in a complementary tile mode that is:
 *
 *  - on the same monitor;
 *  - on the same workspace;
 *  - spanning the remaining monitor width;
 *  - there is no 3rd window stacked between both tiled windows that's
 *    partially visible in the common edge.
 *
 * Return value: (transfer none) (allow-none): the matching tiled window or
 * %NULL if it doesn't exist.
 */
MetaWindow *
meta_window_get_tile_match (MetaWindow *window)
{
  return window->tile_match;
}

void
meta_window_compute_tile_match (MetaWindow *window)
{
  MetaWindow *match;
  MetaStack *stack;
  MetaTileMode match_tile_mode = META_TILE_NONE;

  window->tile_match = NULL;

  if (window->shaded || window->minimized)
    return;

  if (META_WINDOW_TILED_LEFT (window))
    match_tile_mode = META_TILE_RIGHT;
  else if (META_WINDOW_TILED_RIGHT (window))
    match_tile_mode = META_TILE_LEFT;
  else
    return;

  stack = window->screen->stack;

  for (match = meta_stack_get_top (stack);
       match;
       match = meta_stack_get_below (stack, match, FALSE))
    {
      if (!match->shaded &&
          !match->minimized &&
          match->tile_mode == match_tile_mode &&
          match->monitor == window->monitor &&
          meta_window_get_workspace (match) == meta_window_get_workspace (window))
        break;
    }

  if (match)
    {
      MetaWindow *above, *bottommost, *topmost;
      MetaRectangle above_rect, bottommost_rect, topmost_rect;

      if (meta_stack_windows_cmp (window->screen->stack, match, window) > 0)
        {
          topmost = match;
          bottommost = window;
        }
      else
        {
          topmost = window;
          bottommost = match;
        }

      meta_window_get_outer_rect (bottommost, &bottommost_rect);
      meta_window_get_outer_rect (topmost, &topmost_rect);
      /*
       * If there's a window stacked in between which is partially visible
       * behind the topmost tile we don't consider the tiles to match.
       */
      for (above = meta_stack_get_above (stack, bottommost, FALSE);
           above && above != topmost;
           above = meta_stack_get_above (stack, above, FALSE))
        {
          if (above->minimized ||
              above->monitor != window->monitor ||
              meta_window_get_workspace (above) != meta_window_get_workspace (window))
            continue;

          meta_window_get_outer_rect (above, &above_rect);

          if (meta_rectangle_overlap (&above_rect, &bottommost_rect) &&
              meta_rectangle_overlap (&above_rect, &topmost_rect))
            return;
        }

      window->tile_match = match;
    }
}