window-props.c 63.6 KB
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

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/*
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 * SECTION:window-props
 * @short_description: #MetaWindow property handling
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 *
 * A system which can inspect sets of properties of given windows
 * and take appropriate action given their values.
 *
 * Note that all the meta_window_reload_propert* functions require a
 * round trip to the server.
 *
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 * The guts of this system are in meta_display_init_window_prop_hooks().
 * Reading this function will give you insight into how this all fits
 * together.
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 */
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/*
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 * Copyright (C) 2001, 2002, 2003 Red Hat, Inc.
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 * Copyright (C) 2004, 2005 Elijah Newren
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 * Copyright (C) 2009 Thomas Thurman
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 *
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 * 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.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, see <http://www.gnu.org/licenses/>.
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 */

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#define _GNU_SOURCE
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#define _XOPEN_SOURCE 500 /* for gethostname() */
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#include <config.h>
#include "window-props.h"
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#include "window-x11.h"
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#include "window-x11-private.h"
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#include <meta/errors.h>
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#include "xprops.h"
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#include "frame.h"
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#include <meta/group.h>
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#include <X11/Xatom.h>
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#include <unistd.h>
#include <string.h>
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#include "util-private.h"
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#ifndef HOST_NAME_MAX
/* Solaris headers apparently don't define this so do so manually; #326745 */
#define HOST_NAME_MAX 255
#endif

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typedef void (* ReloadValueFunc) (MetaWindow    *window,
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                                  MetaPropValue *value,
                                  gboolean       initial);
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typedef enum {
  NONE       = 0,
  LOAD_INIT  = (1 << 0),
  INCLUDE_OR = (1 << 1),
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  INIT_ONLY  = (1 << 2),
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  FORCE_INIT = (1 << 3),
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} MetaPropHookFlags;

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struct _MetaWindowPropHooks
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{
  Atom property;
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  MetaPropValueType type;
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  ReloadValueFunc reload_func;
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  MetaPropHookFlags flags;
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};
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static void init_prop_value            (MetaWindow          *window,
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                                        MetaWindowPropHooks *hooks,
                                        MetaPropValue       *value);
static void reload_prop_value          (MetaWindow          *window,
                                        MetaWindowPropHooks *hooks,
                                        MetaPropValue       *value,
                                        gboolean             initial);
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static MetaWindowPropHooks* find_hooks (MetaDisplay *display,
                                        Atom         property);


void
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meta_window_reload_property_from_xwindow (MetaWindow      *window,
                                          Window           xwindow,
                                          Atom             property,
                                          gboolean         initial)
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{
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  MetaPropValue value = { 0, };
  MetaWindowPropHooks *hooks;
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  hooks = find_hooks (window->display, property);
  if (!hooks)
    return;
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  if ((hooks->flags & INIT_ONLY) && !initial)
    return;

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  init_prop_value (window, hooks, &value);
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  meta_prop_get_values (window->display, xwindow,
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                        &value, 1);
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  reload_prop_value (window, hooks, &value,
                     initial);

  meta_prop_free_values (&value, 1);
}
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static void
meta_window_reload_property (MetaWindow      *window,
                             Atom             property,
                             gboolean         initial)
{
  meta_window_reload_property_from_xwindow (window,
                                            window->xwindow,
                                            property,
                                            initial);
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}

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void
meta_window_load_initial_properties (MetaWindow *window)
{
  int i, j;
  MetaPropValue *values;
  int n_properties = 0;

  values = g_new0 (MetaPropValue, window->display->n_prop_hooks);

  j = 0;
  for (i = 0; i < window->display->n_prop_hooks; i++)
    {
      MetaWindowPropHooks *hooks = &window->display->prop_hooks_table[i];
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      if (hooks->flags & LOAD_INIT)
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        {
          init_prop_value (window, hooks, &values[j]);
          ++j;
        }
    }
  n_properties = j;

  meta_prop_get_values (window->display, window->xwindow,
                        values, n_properties);

  j = 0;
  for (i = 0; i < window->display->n_prop_hooks; i++)
    {
      MetaWindowPropHooks *hooks = &window->display->prop_hooks_table[i];
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      if (hooks->flags & LOAD_INIT)
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        {
          /* If we didn't actually manage to load anything then we don't need
           * to call the reload function; this is different from a notification
           * where disappearance of a previously present value is significant.
           */
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          if (values[j].type != META_PROP_VALUE_INVALID ||
              hooks->flags & FORCE_INIT)
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            reload_prop_value (window, hooks, &values[j], TRUE);
          ++j;
        }
    }

  meta_prop_free_values (values, n_properties);

  g_free (values);
}

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/* Fill in the MetaPropValue used to get the value of "property" */
static void
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init_prop_value (MetaWindow          *window,
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                 MetaWindowPropHooks *hooks,
                 MetaPropValue       *value)
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{
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  if (!hooks || hooks->type == META_PROP_VALUE_INVALID ||
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      (window->override_redirect && !(hooks->flags & INCLUDE_OR)))
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    {
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      value->type = META_PROP_VALUE_INVALID;
      value->atom = None;
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    }
  else
    {
      value->type = hooks->type;
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      value->atom = hooks->property;
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    }
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}

static void
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reload_prop_value (MetaWindow          *window,
                   MetaWindowPropHooks *hooks,
                   MetaPropValue       *value,
                   gboolean             initial)
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{
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  if (!(window->override_redirect && !(hooks->flags & INCLUDE_OR)))
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    (* hooks->reload_func) (window, value, initial);
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}

static void
reload_wm_client_machine (MetaWindow    *window,
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                          MetaPropValue *value,
                          gboolean       initial)
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{
  g_free (window->wm_client_machine);
  window->wm_client_machine = NULL;
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  if (value->type != META_PROP_VALUE_INVALID)
    window->wm_client_machine = g_strdup (value->v.str);

  meta_verbose ("Window has client machine \"%s\"\n",
                window->wm_client_machine ? window->wm_client_machine : "unset");
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  if (window->wm_client_machine == NULL)
    {
      window->is_remote = FALSE;
    }
  else
    {
      char hostname[HOST_NAME_MAX + 1] = "";

      gethostname (hostname, HOST_NAME_MAX + 1);

      window->is_remote = g_strcmp0 (window->wm_client_machine, hostname) != 0;
    }
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}

static void
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complain_about_broken_client (MetaWindow    *window,
                              MetaPropValue *value,
                              gboolean       initial)
{
  meta_warning ("Broken client! Window %s changed client leader window or SM client ID\n",
                window->desc);
}

static void
reload_net_wm_window_type (MetaWindow    *window,
                           MetaPropValue *value,
                           gboolean       initial)
{
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  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
  MetaWindowX11Private *priv = window_x11->priv;

  if (value->type != META_PROP_VALUE_INVALID)
    {
      int i;

      for (i = 0; i < value->v.atom_list.n_atoms; i++)
        {
          Atom atom = value->v.atom_list.atoms[i];

          /* We break as soon as we find one we recognize,
           * supposed to prefer those near the front of the list
           */
          if (atom == window->display->atom__NET_WM_WINDOW_TYPE_DESKTOP ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_DOCK ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_TOOLBAR ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_MENU ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_UTILITY ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_SPLASH ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_DIALOG ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_DROPDOWN_MENU ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_POPUP_MENU ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_TOOLTIP ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_NOTIFICATION ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_COMBO ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_DND ||
              atom == window->display->atom__NET_WM_WINDOW_TYPE_NORMAL)
            {
              priv->type_atom = atom;
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              break;
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            }
        }
    }
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  meta_window_x11_recalc_window_type (window);
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}

static void
reload_icon (MetaWindow    *window,
             Atom           atom)
{
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  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
  MetaWindowX11Private *priv = window_x11->priv;

  meta_icon_cache_property_changed (&priv->icon_cache,
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                                    window->display,
                                    atom);
  meta_window_queue(window, META_QUEUE_UPDATE_ICON);
}

static void
reload_net_wm_icon (MetaWindow    *window,
                    MetaPropValue *value,
                    gboolean       initial)
{
  reload_icon (window, window->display->atom__NET_WM_ICON);
}

static void
reload_kwm_win_icon (MetaWindow    *window,
                     MetaPropValue *value,
                     gboolean       initial)
{
  reload_icon (window, window->display->atom__KWM_WIN_ICON);
}

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static void
reload_icon_geometry (MetaWindow    *window,
                      MetaPropValue *value,
                      gboolean       initial)
{
  if (value->type != META_PROP_VALUE_INVALID)
    {
      if (value->v.cardinal_list.n_cardinals != 4)
        {
          meta_verbose ("_NET_WM_ICON_GEOMETRY on %s has %d values instead of 4\n",
                        window->desc, value->v.cardinal_list.n_cardinals);
        }
      else
        {
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          MetaRectangle geometry;

          geometry.x = (int)value->v.cardinal_list.cardinals[0];
          geometry.y = (int)value->v.cardinal_list.cardinals[1];
          geometry.width = (int)value->v.cardinal_list.cardinals[2];
          geometry.height = (int)value->v.cardinal_list.cardinals[3];

          meta_window_set_icon_geometry (window, &geometry);
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        }
    }
  else
    {
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      meta_window_set_icon_geometry (window, NULL);
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    }
}

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static void
meta_window_set_custom_frame_extents (MetaWindow *window,
                                      GtkBorder  *extents)
{
  if (extents)
    {
      window->has_custom_frame_extents = TRUE;
      window->custom_frame_extents = *extents;
    }
  else
    {
      window->has_custom_frame_extents = FALSE;
      memset (&window->custom_frame_extents, 0, sizeof (window->custom_frame_extents));
    }

  meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
}

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static void
reload_gtk_frame_extents (MetaWindow    *window,
                          MetaPropValue *value,
                          gboolean       initial)
{
  if (value->type != META_PROP_VALUE_INVALID)
    {
      if (value->v.cardinal_list.n_cardinals != 4)
        {
          meta_verbose ("_GTK_FRAME_EXTENTS on %s has %d values instead of 4\n",
                        window->desc, value->v.cardinal_list.n_cardinals);
        }
      else
        {
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          GtkBorder extents;
          extents.left   = (int)value->v.cardinal_list.cardinals[0];
          extents.right  = (int)value->v.cardinal_list.cardinals[1];
          extents.top    = (int)value->v.cardinal_list.cardinals[2];
          extents.bottom = (int)value->v.cardinal_list.cardinals[3];
          meta_window_set_custom_frame_extents (window, &extents);
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        }
    }
  else
    {
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      meta_window_set_custom_frame_extents (window, NULL);
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    }
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  if (!initial)
    meta_window_queue(window, META_QUEUE_MOVE_RESIZE);
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}

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static void
reload_struts (MetaWindow    *window,
               MetaPropValue *value,
               gboolean       initial)
{
  meta_window_update_struts (window);
}

static void
reload_wm_window_role (MetaWindow    *window,
                       MetaPropValue *value,
                       gboolean       initial)
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{
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  g_clear_pointer (&window->role, g_free);
  if (value->type != META_PROP_VALUE_INVALID)
    window->role = g_strdup (value->v.str);
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}

static void
reload_net_wm_pid (MetaWindow    *window,
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                   MetaPropValue *value,
                   gboolean       initial)
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{
  if (value->type != META_PROP_VALUE_INVALID)
    {
      gulong cardinal = (int) value->v.cardinal;
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      if (cardinal <= 0)
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        meta_warning ("Application set a bogus _NET_WM_PID %lu\n",
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                      cardinal);
      else
        {
          window->net_wm_pid = cardinal;
          meta_verbose ("Window has _NET_WM_PID %d\n",
                        window->net_wm_pid);
        }
    }
}

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static void
reload_net_wm_user_time (MetaWindow    *window,
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                         MetaPropValue *value,
                         gboolean       initial)
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{
  if (value->type != META_PROP_VALUE_INVALID)
    {
      gulong cardinal = value->v.cardinal;
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      meta_window_set_user_time (window, cardinal);
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    }
}

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static void
reload_net_wm_user_time_window (MetaWindow    *window,
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                                MetaPropValue *value,
                                gboolean       initial)
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{
  if (value->type != META_PROP_VALUE_INVALID)
    {
      /* Unregister old NET_WM_USER_TIME_WINDOW */
      if (window->user_time_window != None)
        {
          /* See the comment to the meta_display_register_x_window call below. */
          meta_display_unregister_x_window (window->display,
                                            window->user_time_window);
          /* Don't get events on not-managed windows */
          XSelectInput (window->display->xdisplay,
                        window->user_time_window,
                        NoEventMask);
        }


      /* Obtain the new NET_WM_USER_TIME_WINDOW and register it */
      window->user_time_window = value->v.xwindow;
      if (window->user_time_window != None)
        {
          /* Kind of a hack; display.c:event_callback() ignores events
           * for unknown windows.  We make window->user_time_window
           * known by registering it with window (despite the fact
           * that window->xwindow is already registered with window).
           * This basically means that property notifies to either the
           * window->user_time_window or window->xwindow will be
           * treated identically and will result in functions for
           * window being called to update it.  Maybe we should ignore
           * any property notifies to window->user_time_window other
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           * than atom__NET_WM_USER_TIME ones, but I just don't care
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           * and it's not specified in the spec anyway.
           */
          meta_display_register_x_window (window->display,
                                          &window->user_time_window,
                                          window);
          /* Just listen for property notify events */
          XSelectInput (window->display->xdisplay,
                        window->user_time_window,
                        PropertyChangeMask);

          /* Manually load the _NET_WM_USER_TIME field from the given window
           * at this time as well.  If the user_time_window ever broadens in
           * scope, we'll probably want to load all relevant properties here.
           */
          meta_window_reload_property_from_xwindow (
            window,
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            window->user_time_window,
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            window->display->atom__NET_WM_USER_TIME,
            initial);
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        }
    }
}

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#define MAX_TITLE_LENGTH 512

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/**
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 * set_title_text:
 *
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 * Called by set_window_title() to set the value of @target to @title.
 * If required and @atom is set, it will update the appropriate property.
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 *
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 * Returns: %TRUE if a new title was set.
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 */
static gboolean
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set_title_text (MetaWindow  *window,
                gboolean     previous_was_modified,
                const char  *title,
                Atom         atom,
                char       **target)
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{
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  gboolean modified = FALSE;
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  if (!target)
    return FALSE;
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  g_free (*target);
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  if (!title)
    *target = g_strdup ("");
  else if (g_utf8_strlen (title, MAX_TITLE_LENGTH + 1) > MAX_TITLE_LENGTH)
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    {
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      *target = meta_g_utf8_strndup (title, MAX_TITLE_LENGTH);
      modified = TRUE;
    }
  /* if WM_CLIENT_MACHINE indicates this machine is on a remote host
   * lets place that hostname in the title */
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  else if (meta_window_is_remote (window))
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    {
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      *target = g_strdup_printf (_("%s (on %s)"),
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                      title, window->wm_client_machine);
      modified = TRUE;
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    }
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  else
    *target = g_strdup (title);

  if (modified && atom != None)
    meta_prop_set_utf8_string_hint (window->display,
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                                    window->xwindow,
                                    atom, *target);

  /* Bug 330671 -- Don't forget to clear _NET_WM_VISIBLE_(ICON_)NAME */
  if (!modified && previous_was_modified)
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    {
      meta_error_trap_push (window->display);
      XDeleteProperty (window->display->xdisplay,
                       window->xwindow,
                       atom);
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      meta_error_trap_pop (window->display);
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    }
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  return modified;
}

static void
set_window_title (MetaWindow *window,
                  const char *title)
{
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  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
  MetaWindowX11Private *priv = window_x11->priv;

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  char *new_title = NULL;
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  gboolean modified =
    set_title_text (window,
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                    priv->using_net_wm_visible_name,
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                    title,
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                    window->display->atom__NET_WM_VISIBLE_NAME,
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                    &new_title);
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  priv->using_net_wm_visible_name = modified;
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  meta_window_set_title (window, new_title);

  g_free (new_title);
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}

static void
reload_net_wm_name (MetaWindow    *window,
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                    MetaPropValue *value,
                    gboolean       initial)
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{
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  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
  MetaWindowX11Private *priv = window_x11->priv;

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  if (value->type != META_PROP_VALUE_INVALID)
    {
      set_window_title (window, value->v.str);
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      priv->using_net_wm_name = TRUE;
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      meta_verbose ("Using _NET_WM_NAME for new title of %s: \"%s\"\n",
                    window->desc, window->title);
    }
  else
    {
      set_window_title (window, NULL);
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      priv->using_net_wm_name = FALSE;
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      if (!initial)
        meta_window_reload_property (window, XA_WM_NAME, FALSE);
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    }
}

static void
reload_wm_name (MetaWindow    *window,
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                MetaPropValue *value,
                gboolean       initial)
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{
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  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
  MetaWindowX11Private *priv = window_x11->priv;

  if (priv->using_net_wm_name)
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    {
      meta_verbose ("Ignoring WM_NAME \"%s\" as _NET_WM_NAME is set\n",
                    value->v.str);
      return;
    }
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  if (value->type != META_PROP_VALUE_INVALID)
    {
      set_window_title (window, value->v.str);

      meta_verbose ("Using WM_NAME for new title of %s: \"%s\"\n",
                    window->desc, window->title);
    }
  else
    {
      set_window_title (window, NULL);
    }
}

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static void
meta_window_set_opaque_region (MetaWindow     *window,
                               cairo_region_t *region)
{
  if (cairo_region_equal (window->opaque_region, region))
    return;

  g_clear_pointer (&window->opaque_region, cairo_region_destroy);

  if (region != NULL)
    window->opaque_region = cairo_region_reference (region);

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

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static void
reload_opaque_region (MetaWindow    *window,
                      MetaPropValue *value,
                      gboolean       initial)
{
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  cairo_region_t *opaque_region = NULL;

  if (value->type != META_PROP_VALUE_INVALID)
    {
      gulong *region = value->v.cardinal_list.cardinals;
      int nitems = value->v.cardinal_list.n_cardinals;

      cairo_rectangle_int_t *rects;
      int i, rect_index, nrects;

      if (nitems % 4 != 0)
        {
          meta_verbose ("_NET_WM_OPAQUE_REGION does not have a list of 4-tuples.");
          goto out;
        }

      /* empty region */
      if (nitems == 0)
        goto out;

      nrects = nitems / 4;

      rects = g_new (cairo_rectangle_int_t, nrects);

      rect_index = 0;
      i = 0;
      while (i < nitems)
        {
          cairo_rectangle_int_t *rect = &rects[rect_index];

          rect->x = region[i++];
          rect->y = region[i++];
          rect->width = region[i++];
          rect->height = region[i++];

          rect_index++;
        }

      opaque_region = cairo_region_create_rectangles (rects, nrects);

      g_free (rects);
    }

 out:
  meta_window_set_opaque_region (window, opaque_region);
  cairo_region_destroy (opaque_region);
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}

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Tomas Frydrych committed
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static void
reload_mutter_hints (MetaWindow    *window,
                     MetaPropValue *value,
                     gboolean       initial)
{
  if (value->type != META_PROP_VALUE_INVALID)
    {
      char     *new_hints = value->v.str;
      char     *old_hints = window->mutter_hints;
      gboolean  changed   = FALSE;

      if (new_hints)
        {
          if (!old_hints || strcmp (new_hints, old_hints))
            changed = TRUE;
        }
      else
        {
          if (old_hints)
            changed = TRUE;
        }

      if (changed)
        {
          g_free (old_hints);

          if (new_hints)
            window->mutter_hints = g_strdup (new_hints);
          else
            window->mutter_hints = NULL;

          g_object_notify (G_OBJECT (window), "mutter-hints");
        }
    }
  else if (window->mutter_hints)
    {
      g_free (window->mutter_hints);
      window->mutter_hints = NULL;

      g_object_notify (G_OBJECT (window), "mutter-hints");
    }
}

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static void
reload_net_wm_state (MetaWindow    *window,
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                     MetaPropValue *value,
                     gboolean       initial)
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{
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  MetaWindowX11 *window_x11 = META_WINDOW_X11 (window);
  MetaWindowX11Private *priv = window_x11->priv;

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  int i;

  /* We know this is only an initial window creation,
   * clients don't change the property.
   */

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  if (!initial) {
    /* no, they DON'T change the property */
    meta_verbose ("Ignoring _NET_WM_STATE: we should be the one who set "
                  "the property in the first place\n");
    return;
  }

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  window->shaded = FALSE;
  window->maximized_horizontally = FALSE;
  window->maximized_vertically = FALSE;
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  window->fullscreen = FALSE;
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  priv->wm_state_modal = FALSE;
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  priv->wm_state_skip_taskbar = FALSE;
  priv->wm_state_skip_pager = FALSE;
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  window->wm_state_above = FALSE;
  window->wm_state_below = FALSE;
  window->wm_state_demands_attention = FALSE;

  if (value->type == META_PROP_VALUE_INVALID)
    return;

  i = 0;
  while (i < value->v.atom_list.n_atoms)
    {
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      if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_SHADED)
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        window->shaded = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_MAXIMIZED_HORZ)
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        window->maximize_horizontally_after_placement = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_MAXIMIZED_VERT)
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        window->maximize_vertically_after_placement = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_HIDDEN)
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        window->minimize_after_placement = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_MODAL)
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        priv->wm_state_modal = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_SKIP_TASKBAR)
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        priv->wm_state_skip_taskbar = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_SKIP_PAGER)
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        priv->wm_state_skip_pager = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_FULLSCREEN)
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        window->fullscreen_after_placement = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_ABOVE)
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        window->wm_state_above = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_BELOW)
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        window->wm_state_below = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_DEMANDS_ATTENTION)
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        window->wm_state_demands_attention = TRUE;
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      else if (value->v.atom_list.atoms[i] == window->display->atom__NET_WM_STATE_STICKY)
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        window->on_all_workspaces_requested = TRUE;
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      ++i;
    }

  meta_verbose ("Reloaded _NET_WM_STATE for %s\n",
                window->desc);

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  meta_window_x11_recalc_window_type (window);
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  meta_window_recalc_features (window);
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}

static void
reload_mwm_hints (MetaWindow    *window,
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                  MetaPropValue *value,
                  gboolean       initial)
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{
  MotifWmHints *hints;
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  gboolean old_decorated = window->decorated;
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  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;

  if (value->type == META_PROP_VALUE_INVALID)
    {
      meta_verbose ("Window %s has no MWM hints\n", window->desc);
      meta_window_recalc_features (window);
      return;
    }

  hints = value->v.motif_hints;

  /* We support those MWM hints deemed non-stupid */

  meta_verbose ("Window %s has MWM hints\n",
                window->desc);

  if (hints->flags & MWM_HINTS_DECORATIONS)
    {
      meta_verbose ("Window %s sets MWM_HINTS_DECORATIONS 0x%lx\n",
          window->desc, hints->decorations);

      if (hints->decorations == 0)
        window->mwm_decorated = FALSE;
      /* some input methods use this */
      else if (hints->decorations == MWM_DECOR_BORDER)
        window->mwm_border_only = TRUE;
    }
  else
    meta_verbose ("Decorations flag unset\n");

  if (hints->flags & MWM_HINTS_FUNCTIONS)
    {
      gboolean toggle_value;

      meta_verbose ("Window %s sets MWM_HINTS_FUNCTIONS 0x%lx\n",
                    window->desc, hints->functions);

      /* If _ALL is specified, then other flags indicate what to turn off;
       * if ALL is not specified, flags are what to turn on.
       * at least, I think so
       */

      if ((hints->functions & MWM_FUNC_ALL) == 0)
        {
          toggle_value = TRUE;

          meta_verbose ("Window %s disables all funcs then reenables some\n",
                        window->desc);
          window->mwm_has_close_func = FALSE;
          window->mwm_has_minimize_func = FALSE;
          window->mwm_has_maximize_func = FALSE;
          window->mwm_has_move_func = FALSE;
          window->mwm_has_resize_func = FALSE;
        }
      else
        {
          meta_verbose ("Window %s enables all funcs then disables some\n",
                        window->desc);
          toggle_value = FALSE;
        }

      if ((hints->functions & MWM_FUNC_CLOSE) != 0)
        {
          meta_verbose ("Window %s toggles close via MWM hints\n",
                        window->desc);
          window->mwm_has_close_func = toggle_value;
        }
      if ((hints->functions & MWM_FUNC_MINIMIZE) != 0)
        {
          meta_verbose ("Window %s toggles minimize via MWM hints\n",
                        window->desc);
          window->mwm_has_minimize_func = toggle_value;
        }
      if ((hints->functions & MWM_FUNC_MAXIMIZE) != 0)
        {
          meta_verbose ("Window %s toggles maximize via MWM hints\n",
                        window->desc);
          window->mwm_has_maximize_func = toggle_value;
        }
      if ((hints->functions & MWM_FUNC_MOVE) != 0)
        {
          meta_verbose ("Window %s toggles move via MWM hints\n",
                        window->desc);
          window->mwm_has_move_func = toggle_value;
        }
      if ((hints->functions & MWM_FUNC_RESIZE) != 0)
        {
          meta_verbose ("Window %s toggles resize via MWM hints\n",
                        window->desc);
          window->mwm_has_resize_func = toggle_value;
        }
    }
  else
    meta_verbose ("Functions flag unset\n");

  meta_window_recalc_features (window);
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  /* We do all this anyhow at the end of meta_window_x11_new() */
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  if (!window->constructing)
    {
      if (window->decorated)
        meta_window_ensure_frame (window);
      else
        meta_window_destroy_frame (window);
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      meta_window_queue (window,
                         META_QUEUE_MOVE_RESIZE |
                         /* because ensure/destroy frame may unmap: */
                         META_QUEUE_CALC_SHOWING);
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      if (old_decorated != window->decorated)
        g_object_notify (G_OBJECT (window), "decorated");
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    }
}

static void
reload_wm_class (MetaWindow    *window,
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                 MetaPropValue *value,
                 gboolean       initial)
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{
  if (value->type != META_PROP_VALUE_INVALID)
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    {
      meta_window_set_wm_class (window,
                                value->v.class_hint.res_class,
                                value->v.class_hint.res_name);
    }
  else
    {
      meta_window_set_wm_class (window, NULL, NULL);
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    }

  meta_verbose ("Window %s class: '%s' name: '%s'\n",
      window->desc,
      window->res_class ? window->res_class : "none",
      window->res_name ? window->res_name : "none");
}

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static void
reload_net_wm_desktop (MetaWindow    *window,
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                       MetaPropValue *value,
                       gboolean       initial)
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{
  if (value->type != META_PROP_VALUE_INVALID)
    {
      window->initial_workspace_set = TRUE;
      window->initial_workspace = value->v.cardinal;
      meta_topic (META_DEBUG_PLACEMENT,
                  "Read initial workspace prop %d for %s\n",
                  window->initial_workspace, window->desc);
    }
}

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static void
reload_net_startup_id (MetaWindow    *window,
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                       MetaPropValue *value,
                       gboolean       initial)
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{
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  guint32 timestamp = window->net_wm_user_time;
  MetaWorkspace *workspace = NULL;
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  g_free (window->startup_id);
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  if (value->type != META_PROP_VALUE_INVALID)
    window->startup_id = g_strdup (value->v.str);
  else
    window->startup_id = NULL;
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  /* Update timestamp and workspace on a running window */
  if (!window->constructing)
  {
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    window->initial_timestamp_set = 0;
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    window->initial_workspace_set = 0;
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    if (meta_screen_apply_startup_properties (window->screen, window))
      {
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        if (window->initial_timestamp_set)
          timestamp = window->initial_timestamp;
        if (window->initial_workspace_set)
          workspace = meta_screen_get_workspace_by_index (window->screen, window->initial_workspace);
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        meta_window_activate_with_workspace (window, timestamp, workspace);
      }
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  }
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  meta_verbose ("New _NET_STARTUP_ID \"%s\" for %s\n",
                window->startup_id ? window->startup_id : "unset",
                window->desc);
}

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static void
reload_update_counter (MetaWindow    *window,
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                       MetaPropValue *value,
                       gboolean       initial)
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{
  if (value->type != META_PROP_VALUE_INVALID)
    {
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      meta_window_x11_destroy_sync_request_alarm (window);
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      window->sync_request_counter = None;
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      if (value->v.xcounter_list.n_counters == 0)
        {
          meta_warning ("_NET_WM_SYNC_REQUEST_COUNTER is empty\n");
          return;
        }

      if (value->v.xcounter_list.n_counters == 1)
        {
          window->sync_request_counter = value->v.xcounter_list.counters[0];
          window->extended_sync_request_counter = FALSE;
        }
      else
        {
          window->sync_request_counter = value->v.xcounter_list.counters[1];
          window->extended_sync_request_counter = TRUE;
        }
      meta_verbose ("Window has _NET_WM_SYNC_REQUEST_COUNTER 0x%lx (extended=%s)\n",
                    window->sync_request_counter,
                    window->extended_sync_request_counter ? "true" : "false");
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      if (window->extended_sync_request_counter)
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        meta_window_x11_create_sync_request_alarm (window);
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    }
}

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#define FLAG_TOGGLED_ON(old,new,flag) \
 (((old)->flags & (flag)) == 0 &&     \
  ((new)->flags & (flag)) != 0)

#define FLAG_TOGGLED_OFF(old,new,flag) \
 (((old)->flags & (flag)) != 0 &&      \
  ((new)->flags & (flag)) == 0)

#define FLAG_CHANGED(old,new,flag) \
  (FLAG_TOGGLED_ON(old,new,flag) || FLAG_TOGGLED_OFF(old,new,flag))

static void
spew_size_hints_differences (const XSizeHints *old,
                             const XSizeHints *new)
{
  if (FLAG_CHANGED (old, new, USPosition))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: USPosition now %s\n",
                FLAG_TOGGLED_ON (old, new, USPosition) ? "set" : "unset");
  if (FLAG_CHANGED (old, new, USSize))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: USSize now %s\n",
                FLAG_TOGGLED_ON (old, new, USSize) ? "set" : "unset");
  if (FLAG_CHANGED (old, new, PPosition))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: PPosition now %s\n",
                FLAG_TOGGLED_ON (old, new, PPosition) ? "set" : "unset");
  if (FLAG_CHANGED (old, new, PSize))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: PSize now %s\n",
                FLAG_TOGGLED_ON (old, new, PSize) ? "set" : "unset");
  if (FLAG_CHANGED (old, new, PMinSize))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: PMinSize now %s (%d x %d -> %d x %d)\n",
                FLAG_TOGGLED_ON (old, new, PMinSize) ? "set" : "unset",
                old->min_width, old->min_height,
                new->min_width, new->min_height);
  if (FLAG_CHANGED (old, new, PMaxSize))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: PMaxSize now %s (%d x %d -> %d x %d)\n",
                FLAG_TOGGLED_ON (old, new, PMaxSize) ? "set" : "unset",
                old->max_width, old->max_height,
                new->max_width, new->max_height);
  if (FLAG_CHANGED (old, new, PResizeInc))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: PResizeInc now %s (width_inc %d -> %d height_inc %d -> %d)\n",
                FLAG_TOGGLED_ON (old, new, PResizeInc) ? "set" : "unset",
                old->width_inc, new->width_inc,
                old->height_inc, new->height_inc);
  if (FLAG_CHANGED (old, new, PAspect))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: PAspect now %s (min %d/%d -> %d/%d max %d/%d -> %d/%d)\n",
                FLAG_TOGGLED_ON (old, new, PAspect) ? "set" : "unset",
                old->min_aspect.x, old->min_aspect.y,
                new->min_aspect.x, new->min_aspect.y,
                old->max_aspect.x, old->max_aspect.y,
                new->max_aspect.x, new->max_aspect.y);
  if (FLAG_CHANGED (old, new, PBaseSize))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: PBaseSize now %s (%d x %d -> %d x %d)\n",
                FLAG_TOGGLED_ON (old, new, PBaseSize) ? "set" : "unset",
                old->base_width, old->base_height,
                new->base_width, new->base_height);
  if (FLAG_CHANGED (old, new, PWinGravity))
    meta_topic (META_DEBUG_GEOMETRY, "XSizeHints: PWinGravity now %s  (%d -> %d)\n",
                FLAG_TOGGLED_ON (old, new, PWinGravity) ? "set" : "unset",
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                old->win_gravity, new->win_gravity);
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}

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void
meta_set_normal_hints (MetaWindow *window,
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                       XSizeHints *hints)
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{
  int x, y, w, h;
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  double minr, maxr;
  /* Some convenience vars */
  int minw, minh, maxw, maxh;   /* min/max width/height                      */
  int basew, baseh, winc, hinc; /* base width/height, width/height increment */

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  /* Save the last ConfigureRequest, which we put here.
   * Values here set in the hints are supposed to
   * be ignored.
   */
  x = window->size_hints.x;
  y = window->size_hints.y;
  w = window->size_hints.width;
  h = window->size_hints.height;

  /* as far as I can tell, value->v.size_hints.flags is just to
   * check whether we had old-style normal hints without gravity,
   * base size as returned by XGetNormalHints(), so we don't
   * really use it as we fixup window->size_hints to have those
   * fields if they're missing.
   */

  /*
   * When the window is first created, NULL hints will
   * be passed in which will initialize all of the fields
   * as if flags were zero
   */
  if (hints)
    window->size_hints = *hints;
  else
    window->size_hints.flags = 0;

  /* Put back saved ConfigureRequest. */
  window->size_hints.x = x;
  window->size_hints.y = y;
  window->size_hints.width = w;
  window->size_hints.height = h;

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  /* Get base size hints */
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