Cppcheck report - croma (cppcheck 2.11-3): src/core/keybindings.c

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

/* Croma Keybindings */
/*
 * Copyright (C) 2001 Havoc Pennington
 * Copyright (C) 2002 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., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#define _GNU_SOURCE
#define _XOPEN_SOURCE /* for putenv() */

#include <config.h>
#include "keybindings.h"
#include "workspace.h"
#include "errors.h"
#include "edge-resistance.h"
#include "ui.h"
#include "frame-private.h"
#include "place.h"
#include "prefs.h"
#include "effects.h"
#include "util.h"

#include <gio/gio.h>

#include <X11/keysym.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#ifdef HAVE_XKB
#include <X11/XKBlib.h>
#endif

static gboolean all_bindings_disabled = FALSE;

typedef void (* MetaKeyHandlerFunc) (MetaDisplay    *display,
                                     MetaScreen     *screen,
                                     MetaWindow     *window,
                                     XEvent         *event,
                                     MetaKeyBinding *binding);

/* Prototypes for handlers */
#define keybind(name, handler, param, flags) \
static void \
handler (MetaDisplay    *display,\
         MetaScreen     *screen,\
         MetaWindow     *window,\
         XEvent         *event,\
         MetaKeyBinding *binding);
#include "all-keybindings.h"
#include "../include/util.h"

#undef keybind

/* These can't be bound to anything, but they are used to handle
 * various other events.  TODO: Possibly we should include them as event
 * handler functions and have some kind of flag to say they're unbindable.
 */

static void handle_workspace_switch_or_move  (MetaDisplay    *display,
                                              MetaScreen     *screen,
                                              MetaWindow     *window,
                                              XEvent         *event,
                                              MetaKeyBinding *binding,
                                              gboolean        is_move);

static gboolean process_mouse_move_resize_grab (MetaDisplay *display,
                                                MetaScreen  *screen,
                                                MetaWindow  *window,
                                                XEvent      *event,
                                                KeySym       keysym);

static gboolean process_keyboard_move_grab (MetaDisplay *display,
                                            MetaScreen  *screen,
                                            MetaWindow  *window,
                                            XEvent      *event,
                                            KeySym       keysym);

static gboolean process_keyboard_resize_grab (MetaDisplay *display,
                                              MetaScreen  *screen,
                                              MetaWindow  *window,
                                              XEvent      *event,
                                              KeySym       keysym);

static gboolean process_tab_grab           (MetaDisplay *display,
                                            MetaScreen  *screen,
                                            XEvent      *event,
                                            KeySym       keysym);

static gboolean process_workspace_switch_grab (MetaDisplay *display,
                                               MetaScreen  *screen,
                                               MetaWindow  *window,
                                               XEvent      *event,
                                               KeySym       keysym);

static void regrab_key_bindings         (MetaDisplay *display);

typedef struct
{
  const char *name;
  MetaKeyHandlerFunc func;
  gint data, flags;
} MetaKeyHandler;

struct _MetaKeyBinding
{
  const char *name;
  KeySym keysym;
  KeyCode keycode;
  unsigned int mask;
  MetaVirtualModifier modifiers;
  const MetaKeyHandler *handler;
};

#define keybind(name, handler, param, flags) \
   { #name, handler, param, flags },
static const MetaKeyHandler key_handlers[] = {
#include "all-keybindings.h"
   { NULL, NULL, 0, 0 }
};
#undef keybind

static void
reload_keymap (MetaDisplay *display)
{
  if (display->keymap)
    meta_XFree (display->keymap);

  display->keymap = XGetKeyboardMapping (display->xdisplay,
                                         display->min_keycode,
                                         display->max_keycode -
                                         display->min_keycode + 1,
                                         &display->keysyms_per_keycode);
}

static void
reload_modmap (MetaDisplay *display)
{
  XModifierKeymap *modmap;
  int map_size;
  int i;

  if (display->modmap)
    XFreeModifiermap (display->modmap);

  modmap = XGetModifierMapping (display->xdisplay);
  display->modmap = modmap;

  display->ignored_modifier_mask = 0;

  /* Multiple bits may get set in each of these */
  display->num_lock_mask = 0;
  display->scroll_lock_mask = 0;
  display->meta_mask = 0;
  display->hyper_mask = 0;
  display->super_mask = 0;

  /* there are 8 modifiers, and the first 3 are shift, shift lock,
   * and control
   */
  map_size = 8 * modmap->max_keypermod;
  i = 3 * modmap->max_keypermod;
  while (i < map_size)
    {
      /* get the key code at this point in the map,
       * see if its keysym is one we're interested in
       */
      int keycode = modmap->modifiermap[i];

      if (keycode >= display->min_keycode &&
          keycode <= display->max_keycode)
        {
          int j = 0;
          KeySym *syms = display->keymap +
            (keycode - display->min_keycode) * display->keysyms_per_keycode;

          while (j < display->keysyms_per_keycode)
            {
              if (syms[j] != 0)
                {
                  const char *str;

                  str = XKeysymToString (syms[j]);
                  meta_topic (META_DEBUG_KEYBINDINGS,
                              "Keysym %s bound to modifier 0x%x\n",
                              str ? str : "none",
                              (1 << ( i / modmap->max_keypermod)));
                }

              if (syms[j] == XK_Num_Lock)
                {
                  /* Mod1Mask is 1 << 3 for example, i.e. the
                   * fourth modifier, i / keyspermod is the modifier
                   * index
                   */

                  display->num_lock_mask |= (1 << ( i / modmap->max_keypermod));
                }
              else if (syms[j] == XK_Scroll_Lock)
                {
                  display->scroll_lock_mask |= (1 << ( i / modmap->max_keypermod));
                }
              else if (syms[j] == XK_Super_L ||
                       syms[j] == XK_Super_R)
                {
                  display->super_mask |= (1 << ( i / modmap->max_keypermod));
                }
              else if (syms[j] == XK_Hyper_L ||
                       syms[j] == XK_Hyper_R)
                {
                  display->hyper_mask |= (1 << ( i / modmap->max_keypermod));
                }
              else if (syms[j] == XK_Meta_L ||
                       syms[j] == XK_Meta_R)
                {
                  display->meta_mask |= (1 << ( i / modmap->max_keypermod));
                }

              ++j;
            }
        }

      ++i;
    }

  display->ignored_modifier_mask = (display->num_lock_mask |
                                    display->scroll_lock_mask |
                                    LockMask);

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Ignoring modmask 0x%x num lock 0x%x scroll lock 0x%x hyper 0x%x super 0x%x meta 0x%x\n",
              display->ignored_modifier_mask,
              display->num_lock_mask,
              display->scroll_lock_mask,
              display->hyper_mask,
              display->super_mask,
              display->meta_mask);
}

static void
reload_keycodes (MetaDisplay *display)
{
  meta_topic (META_DEBUG_KEYBINDINGS,
              "Reloading keycodes for binding tables\n");

  if (display->key_bindings)
    {
      int i;

      i = 0;
      while (i < display->n_key_bindings)
        {
          if (display->key_bindings[i].keysym != 0)
	    {
              display->key_bindings[i].keycode = XKeysymToKeycode (
                      display->xdisplay, display->key_bindings[i].keysym);
	    }

          ++i;
        }
    }
}

static void
reload_modifiers (MetaDisplay *display)
{
  meta_topic (META_DEBUG_KEYBINDINGS,
              "Reloading keycodes for binding tables\n");

  if (display->key_bindings)
    {
      int i;

      i = 0;
      while (i < display->n_key_bindings)
        {
          meta_display_devirtualize_modifiers (display,
                                               display->key_bindings[i].modifiers,
                                               &display->key_bindings[i].mask);

          meta_topic (META_DEBUG_KEYBINDINGS,
                      " Devirtualized mods 0x%x -> 0x%x (%s)\n",
                      display->key_bindings[i].modifiers,
                      display->key_bindings[i].mask,
                      display->key_bindings[i].name);

          ++i;
        }
    }
}


static int
count_bindings (const MetaKeyPref *prefs,
                int                n_prefs)
{
  int i;
  int count;

  count = 0;
  i = 0;
  while (i < n_prefs)
    {
      GSList *tmp = prefs[i].bindings;

      while (tmp)
        {
          MetaKeyCombo *combo = tmp->data;<--- Variable 'combo' can be declared as pointer to const

          if (combo && (combo->keysym != None || combo->keycode != 0))
            {
              count += 1;

              if (prefs[i].add_shift &&
                  (combo->modifiers & META_VIRTUAL_SHIFT_MASK) == 0)
                count += 1;
            }

          tmp = tmp->next;
        }

      ++i;
    }

  return count;
}

/* FIXME: replace this with a temporary hash */
static const MetaKeyHandler*
find_handler (const MetaKeyHandler *handlers,
              const char           *name)
{
  const MetaKeyHandler *iter;

  iter = handlers;
  while (iter->name)
    {
      if (strcmp (iter->name, name) == 0)
        return iter;

      ++iter;
    }

  return NULL;
}

static void
rebuild_binding_table (MetaDisplay        *display,
                       MetaKeyBinding    **bindings_p,
                       int                *n_bindings_p,
                       const MetaKeyPref  *prefs,
                       int                 n_prefs)
{
  int n_bindings;
  int src, dest;

  n_bindings = count_bindings (prefs, n_prefs);
  g_free (*bindings_p);
  *bindings_p = g_new0 (MetaKeyBinding, n_bindings);

  src = 0;
  dest = 0;
  while (src < n_prefs)
    {
      GSList *tmp = prefs[src].bindings;

      while (tmp)
        {
          MetaKeyCombo *combo = tmp->data;<--- Variable 'combo' can be declared as pointer to const

          if (combo && (combo->keysym != None || combo->keycode != 0))
            {
              const MetaKeyHandler *handler = find_handler (key_handlers, prefs[src].name);

              (*bindings_p)[dest].name = prefs[src].name;
              (*bindings_p)[dest].handler = handler;
              (*bindings_p)[dest].keysym = combo->keysym;
              (*bindings_p)[dest].keycode = combo->keycode;
              (*bindings_p)[dest].modifiers = combo->modifiers;
              (*bindings_p)[dest].mask = 0;

              ++dest;

              if (prefs[src].add_shift &&
                  (combo->modifiers & META_VIRTUAL_SHIFT_MASK) == 0)
                {
                  meta_topic (META_DEBUG_KEYBINDINGS,
                              "Binding %s also needs Shift grabbed\n",
                               prefs[src].name);

                  (*bindings_p)[dest].name = prefs[src].name;
                  (*bindings_p)[dest].handler = handler;
                  (*bindings_p)[dest].keysym = combo->keysym;
                  (*bindings_p)[dest].keycode = combo->keycode;
                  (*bindings_p)[dest].modifiers = combo->modifiers |
                    META_VIRTUAL_SHIFT_MASK;
                  (*bindings_p)[dest].mask = 0;

                  ++dest;
                }
            }

          tmp = tmp->next;
        }

      ++src;
    }

  g_assert (dest == n_bindings);

  *n_bindings_p = dest;

  meta_topic (META_DEBUG_KEYBINDINGS,
              " %d bindings in table\n",
              *n_bindings_p);
}

static void
rebuild_key_binding_table (MetaDisplay *display)
{
  const MetaKeyPref *prefs;
  int n_prefs;

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Rebuilding key binding table from preferences\n");

  meta_prefs_get_key_bindings (&prefs, &n_prefs);
  rebuild_binding_table (display,
                         &display->key_bindings,
                         &display->n_key_bindings,
                         prefs, n_prefs);
}

static void
regrab_key_bindings (MetaDisplay *display)
{
  GSList *tmp;
  GSList *windows;

  meta_error_trap_push (display); /* for efficiency push outer trap */

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

      meta_screen_ungrab_keys (screen);
      meta_screen_grab_keys (screen);

      tmp = tmp->next;
    }

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

      meta_window_ungrab_keys (w);
      meta_window_grab_keys (w);

      tmp = tmp->next;
    }
  meta_error_trap_pop (display, FALSE);

  g_slist_free (windows);
}

static MetaKeyBindingAction
display_get_keybinding_action (MetaDisplay  *display,
                               unsigned int  keysym,
                               unsigned int  keycode,
                               unsigned long mask)
{
  int i;

  i = display->n_key_bindings - 1;
  while (i >= 0)
    {
      if (display->key_bindings[i].keysym == keysym &&
          display->key_bindings[i].keycode == keycode &&
          display->key_bindings[i].mask == mask)
        {
          return meta_prefs_get_keybinding_action (display->key_bindings[i].name);
        }

      --i;
    }

  return META_KEYBINDING_ACTION_NONE;
}

void
meta_display_process_mapping_event (MetaDisplay *display,
                                    XEvent      *event)
{
  gboolean keymap_changed = FALSE;
  gboolean modmap_changed = FALSE;

#ifdef HAVE_XKB
  if (event->type == display->xkb_base_event_type)
    {
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "XKB mapping changed, will redo keybindings\n");

      keymap_changed = TRUE;
      modmap_changed = TRUE;
    }
  else
#endif
  if (event->xmapping.request == MappingModifier)
    {
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Received MappingModifier event, will reload modmap and redo keybindings\n");

      modmap_changed = TRUE;
    }
  else if (event->xmapping.request == MappingKeyboard)
    {
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Received MappingKeyboard event, will reload keycodes and redo keybindings\n");

      keymap_changed = TRUE;
    }

  /* Now to do the work itself */

  if (keymap_changed || modmap_changed)
    {
      if (keymap_changed)
        reload_keymap (display);

      /* Deciphering the modmap depends on the loaded keysyms to find out
       * what modifiers is Super and so forth, so we need to reload it
       * even when only the keymap changes */
      reload_modmap (display);


      if (keymap_changed)
        reload_keycodes (display);

      reload_modifiers (display);

      regrab_key_bindings (display);
    }
}

static void
bindings_changed_callback (MetaPreference pref,
                           void          *data)
{
  MetaDisplay *display;

  display = data;

  switch (pref)
    {
    case META_PREF_KEYBINDINGS:
      rebuild_key_binding_table (display);
      reload_keycodes (display);
      reload_modifiers (display);
      regrab_key_bindings (display);
      break;
    default:
      break;
    }
}


void
meta_display_init_keys (MetaDisplay *display)
{
  /* Keybindings */
  display->keymap = NULL;
  display->keysyms_per_keycode = 0;
  display->modmap = NULL;
  display->min_keycode = 0;
  display->max_keycode = 0;
  display->ignored_modifier_mask = 0;
  display->num_lock_mask = 0;
  display->scroll_lock_mask = 0;
  display->hyper_mask = 0;
  display->super_mask = 0;
  display->meta_mask = 0;
  display->key_bindings = NULL;
  display->n_key_bindings = 0;

  XDisplayKeycodes (display->xdisplay,
                    &display->min_keycode,
                    &display->max_keycode);

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Display has keycode range %d to %d\n",
              display->min_keycode,
              display->max_keycode);

  reload_keymap (display);
  reload_modmap (display);

  rebuild_key_binding_table (display);

  reload_keycodes (display);
  reload_modifiers (display);

  /* Keys are actually grabbed in meta_screen_grab_keys() */

  meta_prefs_add_listener (bindings_changed_callback, display);

#ifdef HAVE_XKB
  /* meta_display_init_keys() should have already called XkbQueryExtension() */
  if (display->xkb_base_event_type != -1)
    XkbSelectEvents (display->xdisplay, XkbUseCoreKbd,
                     XkbNewKeyboardNotifyMask | XkbMapNotifyMask,
                     XkbNewKeyboardNotifyMask | XkbMapNotifyMask);
#endif
}

void
meta_display_shutdown_keys (MetaDisplay *display)
{
  /* Note that display->xdisplay is invalid in this function */

  meta_prefs_remove_listener (bindings_changed_callback, display);

  if (display->keymap)
    meta_XFree (display->keymap);

  if (display->modmap)
    XFreeModifiermap (display->modmap);
  g_free (display->key_bindings);
}

static const char*
keysym_name (int keysym)
{
  const char *name;

  name = XKeysymToString (keysym);
  if (name == NULL)
    name = "(unknown)";

  return name;
}

/* Grab/ungrab, ignoring all annoying modifiers like NumLock etc. */
static void
meta_change_keygrab (MetaDisplay *display,
                     Window       xwindow,
                     gboolean     grab,
                     int          keysym,
                     unsigned int keycode,
                     int          modmask)
{
  unsigned int ignored_mask;

  /* Grab keycode/modmask, together with
   * all combinations of ignored modifiers.
   * X provides no better way to do this.
   */

  meta_topic (META_DEBUG_KEYBINDINGS,
              "%s keybinding %s keycode %d mask 0x%x on 0x%lx\n",
              grab ? "Grabbing" : "Ungrabbing",
              keysym_name (keysym), keycode,
              modmask, xwindow);

  /* efficiency, avoid so many XSync() */
  meta_error_trap_push (display);

  ignored_mask = 0;
  while (ignored_mask <= display->ignored_modifier_mask)
    {
      if (ignored_mask & ~(display->ignored_modifier_mask))
        {
          /* Not a combination of ignored modifiers
           * (it contains some non-ignored modifiers)
           */
          ++ignored_mask;
          continue;
        }

      if (meta_is_debugging ())
        meta_error_trap_push (display);

      if (grab)
        XGrabKey (display->xdisplay, keycode,
                  modmask | ignored_mask,
                  xwindow,
                  True,
                  GrabModeAsync, GrabModeSync);
      else
        XUngrabKey (display->xdisplay, keycode,
                    modmask | ignored_mask,
                    xwindow);

      if (meta_is_debugging ())
        {
          int result;

          result = meta_error_trap_pop_with_return (display, FALSE);

          if (grab && result != Success)
            {
              if (result == BadAccess)
                meta_warning (_("Some other program is already using the key %s with modifiers %x as a binding\n"), keysym_name (keysym), modmask | ignored_mask);
              else
                meta_topic (META_DEBUG_KEYBINDINGS,
                            "Failed to grab key %s with modifiers %x\n",
                            keysym_name (keysym), modmask | ignored_mask);
            }
        }

      ++ignored_mask;
    }

  meta_error_trap_pop (display, FALSE);
}

static void
meta_grab_key (MetaDisplay *display,
               Window       xwindow,
               int          keysym,
               unsigned int keycode,
               int          modmask)
{
  meta_change_keygrab (display, xwindow, TRUE, keysym, keycode, modmask);
}

static void
grab_keys (MetaKeyBinding *bindings,
           int             n_bindings,
           MetaDisplay    *display,
           Window          xwindow,
           gboolean        binding_per_window)
{
  int i;

  g_assert (n_bindings == 0 || bindings != NULL);

  meta_error_trap_push (display);

  i = 0;
  while (i < n_bindings)
    {
      if (!!binding_per_window ==
          !!(bindings[i].handler->flags & BINDING_PER_WINDOW) &&
          bindings[i].keycode != 0)
        {
          meta_grab_key (display, xwindow,
                         bindings[i].keysym,
                         bindings[i].keycode,
                         bindings[i].mask);
        }

      ++i;
    }

  meta_error_trap_pop (display, FALSE);
}

static void
ungrab_all_keys (MetaDisplay *display,
                 Window       xwindow)
{
  meta_error_trap_push (display);

  XUngrabKey (display->xdisplay, AnyKey, AnyModifier,
              xwindow);

  if (meta_is_debugging ())
    {
      int result;

      result = meta_error_trap_pop_with_return (display, FALSE);

      if (result != Success)
        meta_topic (META_DEBUG_KEYBINDINGS,
                    "Ungrabbing all keys on 0x%lx failed\n", xwindow);
    }
  else
    meta_error_trap_pop (display, FALSE);
}

void
meta_screen_grab_keys (MetaScreen *screen)
{
  if (screen->all_keys_grabbed)
    return;

  if (screen->keys_grabbed)
    return;

  grab_keys (screen->display->key_bindings,
             screen->display->n_key_bindings,
             screen->display, screen->xroot,
             FALSE);

  screen->keys_grabbed = TRUE;
}

void
meta_screen_ungrab_keys (MetaScreen  *screen)
{
  if (screen->keys_grabbed)
    {
      ungrab_all_keys (screen->display, screen->xroot);
      screen->keys_grabbed = FALSE;
    }
}

void
meta_window_grab_keys (MetaWindow  *window)
{
  if (window->all_keys_grabbed)
    return;

  if (window->type == META_WINDOW_DOCK)
    {
      if (window->keys_grabbed)
        ungrab_all_keys (window->display, window->xwindow);
      window->keys_grabbed = FALSE;
      return;
    }

  if (window->keys_grabbed)
    {
      if (window->frame && !window->grab_on_frame)
        ungrab_all_keys (window->display, window->xwindow);
      else if (window->frame == NULL &&
               window->grab_on_frame)
        ; /* continue to regrab on client window */
      else
        return; /* already all good */
    }

  grab_keys (window->display->key_bindings,
             window->display->n_key_bindings,
             window->display,
             window->frame ? window->frame->xwindow : window->xwindow,
             TRUE);

  window->keys_grabbed = TRUE;
  window->grab_on_frame = window->frame != NULL;
}

void
meta_window_ungrab_keys (MetaWindow  *window)
{
  if (window->keys_grabbed)
    {
      if (window->grab_on_frame &&
          window->frame != NULL)
        ungrab_all_keys (window->display,
                         window->frame->xwindow);
      else if (!window->grab_on_frame)
        ungrab_all_keys (window->display,
                         window->xwindow);

      window->keys_grabbed = FALSE;
    }
}

#ifdef WITH_VERBOSE_MODE
static const char*
grab_status_to_string (int status)
{
  switch (status)
    {
    case AlreadyGrabbed:
      return "AlreadyGrabbed";
    case GrabSuccess:
      return "GrabSuccess";
    case GrabNotViewable:
      return "GrabNotViewable";
    case GrabFrozen:
      return "GrabFrozen";
    case GrabInvalidTime:
      return "GrabInvalidTime";
    default:
      return "(unknown)";
    }
}
#endif /* WITH_VERBOSE_MODE */

static gboolean
grab_keyboard (MetaDisplay *display,
               Window       xwindow,
               guint32      timestamp)
{
  int grab_status;

  /* Grab the keyboard, so we get key releases and all key
   * presses
   */
  meta_error_trap_push (display);

  grab_status = XGrabKeyboard (display->xdisplay,
                               xwindow, True,
                               GrabModeAsync, GrabModeAsync,
                               timestamp);

  if (grab_status != GrabSuccess)
    {
      meta_error_trap_pop_with_return (display, TRUE);
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "XGrabKeyboard() returned failure status %s time %u\n",
                  grab_status_to_string (grab_status),
                  timestamp);
      return FALSE;
    }
  else
    {
      int result;

      result = meta_error_trap_pop_with_return (display, TRUE);

      if (result != Success)
        {
          meta_topic (META_DEBUG_KEYBINDINGS,
                      "XGrabKeyboard() resulted in an error\n");
          return FALSE;
        }
    }

  meta_topic (META_DEBUG_KEYBINDINGS, "Grabbed all keys\n");

  return TRUE;
}

static void
ungrab_keyboard (MetaDisplay *display, guint32 timestamp)
{
  meta_error_trap_push (display);

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Ungrabbing keyboard with timestamp %u\n",
              timestamp);
  XUngrabKeyboard (display->xdisplay, timestamp);
  meta_error_trap_pop (display, FALSE);
}

gboolean
meta_screen_grab_all_keys (MetaScreen *screen, guint32 timestamp)
{
  gboolean retval;

  if (screen->all_keys_grabbed)
    return FALSE;

  if (screen->keys_grabbed)
    meta_screen_ungrab_keys (screen);

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Grabbing all keys on RootWindow\n");
  retval = grab_keyboard (screen->display, screen->xroot, timestamp);
  if (retval)
    screen->all_keys_grabbed = TRUE;
  else
    meta_screen_grab_keys (screen);

  return retval;
}

void
meta_screen_ungrab_all_keys (MetaScreen *screen, guint32 timestamp)
{
  if (screen->all_keys_grabbed)
    {
      ungrab_keyboard (screen->display, timestamp);

      screen->all_keys_grabbed = FALSE;
      screen->keys_grabbed = FALSE;

      /* Re-establish our standard bindings */
      meta_screen_grab_keys (screen);
    }
}

gboolean
meta_window_grab_all_keys (MetaWindow  *window,
                           guint32      timestamp)
{
  Window grabwindow;
  gboolean retval;

  if (window->all_keys_grabbed)
    return FALSE;

  if (window->keys_grabbed)
    meta_window_ungrab_keys (window);

  /* Make sure the window is focused, otherwise the grab
   * won't do a lot of good.
   */
  meta_topic (META_DEBUG_FOCUS,
              "Focusing %s because we're grabbing all its keys\n",
              window->desc);
  meta_window_focus (window, timestamp);

  grabwindow = window->frame ? window->frame->xwindow : window->xwindow;

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Grabbing all keys on window %s\n", window->desc);
  retval = grab_keyboard (window->display, grabwindow, timestamp);
  if (retval)
    {
      window->keys_grabbed = FALSE;
      window->all_keys_grabbed = TRUE;
      window->grab_on_frame = window->frame != NULL;
    }

  return retval;
}

void
meta_window_ungrab_all_keys (MetaWindow *window, guint32 timestamp)
{
  if (window->all_keys_grabbed)
    {
      ungrab_keyboard (window->display, timestamp);

      window->grab_on_frame = FALSE;
      window->all_keys_grabbed = FALSE;
      window->keys_grabbed = FALSE;

      /* Re-establish our standard bindings */
      meta_window_grab_keys (window);
    }
}

static gboolean
is_modifier (MetaDisplay *display,
             unsigned int keycode)
{
  int i;
  int map_size;
  gboolean retval = FALSE;

  g_assert (display->modmap);

  map_size = 8 * display->modmap->max_keypermod;
  i = 0;
  while (i < map_size)
    {
      if (keycode == display->modmap->modifiermap[i])
        {
          retval = TRUE;
          break;
        }
      ++i;
    }

  return retval;
}

/* Indexes:
 * shift = 0
 * lock = 1
 * control = 2
 * mod1 = 3
 * mod2 = 4
 * mod3 = 5
 * mod4 = 6
 * mod5 = 7
 */

static gboolean
is_specific_modifier (MetaDisplay *display,
                      unsigned int keycode,
                      unsigned int mask)
{
  int i;
  int end;
  gboolean retval = FALSE;
  int mod_index;

  g_assert (display->modmap);

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Checking whether code 0x%x is bound to modifier 0x%x\n",
              keycode, mask);

  mod_index = 0;
  mask = mask >> 1;
  while (mask != 0)
    {
      mod_index += 1;
      mask = mask >> 1;
    }

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Modifier has index %d\n", mod_index);

  end = (mod_index + 1) * display->modmap->max_keypermod;
  i = mod_index * display->modmap->max_keypermod;
  while (i < end)
    {
      if (keycode == display->modmap->modifiermap[i])
        {
          retval = TRUE;
          break;
        }
      ++i;
    }

  return retval;
}

static unsigned int
get_primary_modifier (MetaDisplay *display,
                      unsigned int entire_binding_mask)
{
  /* The idea here is to see if the "main" modifier
   * for Alt+Tab has been pressed/released. So if the binding
   * is Alt+Shift+Tab then releasing Alt is the thing that
   * ends the operation. It's pretty random how we order
   * these.
   */
  unsigned int masks[] = { Mod5Mask, Mod4Mask, Mod3Mask,
                           Mod2Mask, Mod1Mask, ControlMask,
                           ShiftMask, LockMask };

  int i;

  i = 0;
  while (i < (int) G_N_ELEMENTS (masks))
    {
      if (entire_binding_mask & masks[i])
        return masks[i];
      ++i;
    }

  return 0;
}

static gboolean
keycode_is_primary_modifier (MetaDisplay *display,
                             unsigned int keycode,
                             unsigned int entire_binding_mask)
{
  unsigned int primary_modifier;

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Checking whether code 0x%x is the primary modifier of mask 0x%x\n",
              keycode, entire_binding_mask);

  primary_modifier = get_primary_modifier (display, entire_binding_mask);
  if (primary_modifier != 0)
    return is_specific_modifier (display, keycode, primary_modifier);
  else
    return FALSE;
}

static gboolean
primary_modifier_still_pressed (MetaDisplay *display,
                                unsigned int entire_binding_mask)
{
  unsigned int primary_modifier;
  int x, y, root_x, root_y;
  Window root, child;
  guint mask;
  MetaScreen *random_screen;
  Window      random_xwindow;

  primary_modifier = get_primary_modifier (display, entire_binding_mask);

  random_screen = display->screens->data;
  random_xwindow = random_screen->no_focus_window;
  XQueryPointer (display->xdisplay,
                 random_xwindow, /* some random window */
                 &root, &child,
                 &root_x, &root_y,
                 &x, &y,
                 &mask);

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Primary modifier 0x%x full grab mask 0x%x current state 0x%x\n",
              primary_modifier, entire_binding_mask, mask);

  if ((mask & primary_modifier) == 0)
    return FALSE;
  else
    return TRUE;
}

/* now called from only one place, may be worth merging */
static gboolean
process_event (MetaKeyBinding       *bindings,
               int                   n_bindings,
               MetaDisplay          *display,
               MetaScreen           *screen,
               MetaWindow           *window,
               XEvent               *event,
               gboolean              on_window)
{
  int i;

  /* we used to have release-based bindings but no longer. */
  if (event->type == KeyRelease)
    return FALSE;

  /*
   * TODO: This would be better done with a hash table;
   * it doesn't suit to use O(n) for such a common operation.
   */
  for (i=0; i<n_bindings; i++)
    {
      const MetaKeyHandler *handler = bindings[i].handler;

      if ((!on_window && handler->flags & BINDING_PER_WINDOW) ||
          event->type != KeyPress ||
          bindings[i].keycode != event->xkey.keycode ||
          ((event->xkey.state & 0xff & ~(display->ignored_modifier_mask)) !=
           bindings[i].mask))
        continue;

      /*
       * window must be non-NULL for on_window to be true,
       * and so also window must be non-NULL if we get here and
       * this is a BINDING_PER_WINDOW binding.
       */

      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Binding keycode 0x%x mask 0x%x matches event 0x%x state 0x%x\n",
                  bindings[i].keycode, bindings[i].mask,
                  event->xkey.keycode, event->xkey.state);

      if (handler == NULL)
        meta_bug ("Binding %s has no handler\n", bindings[i].name);
      else
        meta_topic (META_DEBUG_KEYBINDINGS,
                    "Running handler for %s\n",
                    bindings[i].name);

      /* Global keybindings count as a let-the-terminal-lose-focus
       * due to new window mapping until the user starts
       * interacting with the terminal again.
       */
      display->allow_terminal_deactivation = TRUE;

      (* handler->func) (display, screen,
                         (bindings[i].handler->flags & BINDING_PER_WINDOW) ? window: NULL,
                         event,
                         &bindings[i]);
      return TRUE;
    }

  meta_topic (META_DEBUG_KEYBINDINGS,
              "No handler found for this event in this binding table\n");
  return FALSE;
}

/* Handle a key event. May be called recursively: some key events cause
 * grabs to be ended and then need to be processed again in their own
 * right. This cannot cause infinite recursion because we never call
 * ourselves when there wasn't a grab, and we always clear the grab
 * first; the invariant is enforced using an assertion. See #112560.
 * FIXME: We need to prove there are no race conditions here.
 * FIXME: Does it correctly handle alt-Tab being followed by another
 * grabbing keypress without letting go of alt?
 * FIXME: An iterative solution would probably be simpler to understand
 * (and help us solve the other fixmes).
 */
void
meta_display_process_key_event (MetaDisplay *display,
                                MetaWindow  *window,
                                XEvent      *event)
{
  KeySym keysym;
  gboolean keep_grab;
  gboolean all_keys_grabbed;
  const char *str;
  MetaScreen *screen;

  XAllowEvents (display->xdisplay,
                all_bindings_disabled ? ReplayKeyboard : AsyncKeyboard,
                event->xkey.time);
  if (all_bindings_disabled)
    return;

  /* if key event was on root window, we have a shortcut */
  screen = meta_display_screen_for_root (display, event->xkey.window);

  /* else round-trip to server */
  if (screen == NULL)
    screen = meta_display_screen_for_xwindow (display,
                                              event->xany.window);

  if (screen == NULL)
    return; /* event window is destroyed */

  /* ignore key events on popup menus and such. */
  if (window == NULL &&
      meta_ui_window_is_widget (screen->ui, event->xany.window))
    return;

  /* Use focused window when processing synthetic events from another client */
  if (window == NULL && event->xkey.send_event) {
    Window focus = None;
    int ret_to = RevertToPointerRoot;
    XGetInputFocus (display->xdisplay, &focus, &ret_to);
    window = meta_display_lookup_x_window (display, focus);
  }

  /* window may be NULL */

#ifdef HAVE_XKB
  keysym = XkbKeycodeToKeysym (display->xdisplay, event->xkey.keycode, 0, 0);
  str = XKeysymToString (keysym);
#else
  keysym = 0;
  str = NULL;<--- Assignment 'str=NULL', assigned value is 0
#endif

  /* was topic */
  meta_topic (META_DEBUG_KEYBINDINGS,
              "Processing key %s event, keysym: %s state: 0x%x window: %s\n",
              event->type == KeyPress ? "press" : "release",
              str ? str : "none", event->xkey.state,<--- Condition 'str' is always false
              window ? window->desc : "(no window)");

  keep_grab = TRUE;
  all_keys_grabbed = window ? window->all_keys_grabbed : screen->all_keys_grabbed;
  if (all_keys_grabbed)
    {
      if (display->grab_op == META_GRAB_OP_NONE)
        return;
      /* If we get here we have a global grab, because
        * we're in some special keyboard mode such as window move
        * mode.
        */
      if (window ? (window == display->grab_window) :
          (screen == display->grab_screen))
        {
          switch (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:
              meta_topic (META_DEBUG_KEYBINDINGS,
                          "Processing event for mouse-only move/resize\n");
              g_assert (window != NULL);
              keep_grab = process_mouse_move_resize_grab (display, screen,
                                                          window, event, keysym);
              break;

            case META_GRAB_OP_KEYBOARD_MOVING:
              meta_topic (META_DEBUG_KEYBINDINGS,
                          "Processing event for keyboard move\n");
              g_assert (window != NULL);
              keep_grab = process_keyboard_move_grab (display, screen,
                                                      window, event, keysym);
              break;

            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:
              meta_topic (META_DEBUG_KEYBINDINGS,
                          "Processing event for keyboard resize\n");
              g_assert (window != NULL);
              keep_grab = process_keyboard_resize_grab (display, screen,
                                                        window, event, keysym);
              break;

            case META_GRAB_OP_KEYBOARD_TABBING_NORMAL:
            case META_GRAB_OP_KEYBOARD_TABBING_NORMAL_ALL_WORKSPACES:
            case META_GRAB_OP_KEYBOARD_TABBING_DOCK:
            case META_GRAB_OP_KEYBOARD_TABBING_GROUP:
            case META_GRAB_OP_KEYBOARD_ESCAPING_NORMAL:
            case META_GRAB_OP_KEYBOARD_ESCAPING_NORMAL_ALL_WORKSPACES:
            case META_GRAB_OP_KEYBOARD_ESCAPING_DOCK:
            case META_GRAB_OP_KEYBOARD_ESCAPING_GROUP:
              meta_topic (META_DEBUG_KEYBINDINGS,
                          "Processing event for keyboard tabbing/cycling\n");
              keep_grab = process_tab_grab (display, screen, event, keysym);
              break;

            case META_GRAB_OP_KEYBOARD_WORKSPACE_SWITCHING:
            case META_GRAB_OP_KEYBOARD_WORKSPACE_MOVING:
              meta_topic (META_DEBUG_KEYBINDINGS,
                          "Processing event for keyboard workspace switching\n");
              keep_grab = process_workspace_switch_grab (display, screen, window, event, keysym);
              break;
            default:
              break;
            }
        }
      if (!keep_grab)
        {
          meta_topic (META_DEBUG_KEYBINDINGS,
                      "Ending grab op %u on key event sym %s\n",
                      display->grab_op, XKeysymToString (keysym));
          meta_display_end_grab_op (display, event->xkey.time);
          return;
        }
      }
  /* Do the normal keybindings */
  process_event (display->key_bindings,
                 display->n_key_bindings,
                 display, screen, window, event,
                 !all_keys_grabbed && window);
}

static gboolean
process_mouse_move_resize_grab (MetaDisplay *display,
                                MetaScreen  *screen,
                                MetaWindow  *window,
                                XEvent      *event,<--- Parameter 'event' can be declared as pointer to const
                                KeySym       keysym)
{
  /* don't care about releases, but eat them, don't end grab */
  if (event->type == KeyRelease)
    return TRUE;

  if (keysym == XK_Escape)
    {
      /* Restore the original tile mode */
      window->tile_mode = display->grab_tile_mode;
      window->tile_monitor_number = display->grab_tile_monitor_number;

      /* End move or resize and restore to original state.  If the
       * window was a maximized window that had been "shaken loose" we
       * need to remaximize it.  In normal cases, we need to do a
       * moveresize now to get the position back to the original.  In
       * wireframe mode, we just need to set grab_was_cancelled to tru
       * to avoid avoid moveresizing to the position of the wireframe.
       */
      if (window->shaken_loose)
        meta_window_maximize (window,
                              META_MAXIMIZE_HORIZONTAL |
                              META_MAXIMIZE_VERTICAL);
      else if (window->tile_mode != META_TILE_MAXIMIZED &&
               window->tile_mode != META_TILE_NONE)
        meta_window_tile (window);
      else if (!display->grab_wireframe_active)
        meta_window_move_resize (display->grab_window,
                                 TRUE,
                                 display->grab_initial_window_pos.x,
                                 display->grab_initial_window_pos.y,
                                 display->grab_initial_window_pos.width,
                                 display->grab_initial_window_pos.height);
      else
        display->grab_was_cancelled = TRUE;

      /* End grab */
      return FALSE;
    }

  return TRUE;
}

static gboolean
process_keyboard_move_grab (MetaDisplay *display,
                            MetaScreen  *screen,
                            MetaWindow  *window,
                            XEvent      *event,
                            KeySym       keysym)
{
  gboolean handled;
  int x, y;
  int incr;
  gboolean smart_snap;

  handled = FALSE;

  /* don't care about releases, but eat them, don't end grab */
  if (event->type == KeyRelease)
    return TRUE;

  /* don't end grab on modifier key presses */
  if (is_modifier (display, event->xkey.keycode))
    return TRUE;

  if (display->grab_wireframe_active)
    {
      x = display->grab_wireframe_rect.x;
      y = display->grab_wireframe_rect.y;
    }
  else
    {
      meta_window_get_position (window, &x, &y);
    }

  smart_snap = (event->xkey.state & ShiftMask) != 0;

#define SMALL_INCREMENT 1
#define NORMAL_INCREMENT 10

  if (smart_snap)
    incr = 1;
  else if (event->xkey.state & ControlMask)
    incr = SMALL_INCREMENT;
  else
    incr = NORMAL_INCREMENT;

  if (keysym == XK_Escape)
    {
      /* End move and restore to original state.  If the window was a
       * maximized window that had been "shaken loose" we need to
       * remaximize it.  In normal cases, we need to do a moveresize
       * now to get the position back to the original.  In wireframe
       * mode, we just need to set grab_was_cancelled to tru to avoid
       * avoid moveresizing to the position of the wireframe.
       */
      if (window->shaken_loose)
        meta_window_maximize (window,
                              META_MAXIMIZE_HORIZONTAL |
                              META_MAXIMIZE_VERTICAL);
      else if (!display->grab_wireframe_active)
        meta_window_move_resize (display->grab_window,
                                 TRUE,
                                 display->grab_initial_window_pos.x,
                                 display->grab_initial_window_pos.y,
                                 display->grab_initial_window_pos.width,
                                 display->grab_initial_window_pos.height);
      else
        display->grab_was_cancelled = TRUE;
    }

  /* When moving by increments, we still snap to edges if the move
   * to the edge is smaller than the increment. This is because
   * Shift + arrow to snap is sort of a hidden feature. This way
   * people using just arrows shouldn't get too frustrated.
   */
  switch (keysym)
    {
    case XK_KP_Home:
    case XK_KP_Prior:
    case XK_Up:
    case XK_KP_Up:
      y -= incr;
      handled = TRUE;
      break;
    case XK_KP_End:
    case XK_KP_Next:
    case XK_Down:
    case XK_KP_Down:
      y += incr;
      handled = TRUE;
      break;
    }

  switch (keysym)
    {
    case XK_KP_Home:
    case XK_KP_End:
    case XK_Left:
    case XK_KP_Left:
      x -= incr;
      handled = TRUE;
      break;
    case XK_KP_Prior:
    case XK_KP_Next:
    case XK_Right:
    case XK_KP_Right:
      x += incr;
      handled = TRUE;
      break;
    }

  if (handled)
    {
      MetaRectangle old_rect;
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Computed new window location %d,%d due to keypress\n",
                  x, y);

      if (display->grab_wireframe_active)
        old_rect = display->grab_wireframe_rect;
      else
        meta_window_get_client_root_coords (window, &old_rect);

      meta_window_edge_resistance_for_move (window,
                                            old_rect.x,
                                            old_rect.y,
                                            &x,
                                            &y,
                                            NULL,
                                            smart_snap,
                                            TRUE);

      if (display->grab_wireframe_active)
        {
          meta_window_update_wireframe (window, x, y,
                                        display->grab_wireframe_rect.width,
                                        display->grab_wireframe_rect.height);
        }
      else
        {
          meta_window_move (window, TRUE, x, y);
        }

      meta_window_update_keyboard_move (window);
    }

  return handled;
}

static gboolean
process_keyboard_resize_grab_op_change (MetaDisplay *display,
                                        MetaScreen  *screen,
                                        MetaWindow  *window,
                                        XEvent      *event,
                                        KeySym       keysym)
{
  gboolean handled;

  handled = FALSE;
  switch (display->grab_op)
    {
    case META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN:
      switch (keysym)
        {
        case XK_Up:
        case XK_KP_Up:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_N;
          handled = TRUE;
          break;
        case XK_Down:
        case XK_KP_Down:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_S;
          handled = TRUE;
          break;
        case XK_Left:
        case XK_KP_Left:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_W;
          handled = TRUE;
          break;
        case XK_Right:
        case XK_KP_Right:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_E;
          handled = TRUE;
          break;
        }
      break;

    case META_GRAB_OP_KEYBOARD_RESIZING_S:
      switch (keysym)
        {
        case XK_Left:
        case XK_KP_Left:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_W;
          handled = TRUE;
          break;
        case XK_Right:
        case XK_KP_Right:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_E;
          handled = TRUE;
          break;
        }
      break;

    case META_GRAB_OP_KEYBOARD_RESIZING_N:
      switch (keysym)
        {
        case XK_Left:
        case XK_KP_Left:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_W;
          handled = TRUE;
          break;
        case XK_Right:
        case XK_KP_Right:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_E;
          handled = TRUE;
          break;
        }
      break;

    case META_GRAB_OP_KEYBOARD_RESIZING_W:
      switch (keysym)
        {
        case XK_Up:
        case XK_KP_Up:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_N;
          handled = TRUE;
          break;
        case XK_Down:
        case XK_KP_Down:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_S;
          handled = TRUE;
          break;
        }
      break;

    case META_GRAB_OP_KEYBOARD_RESIZING_E:
      switch (keysym)
        {
        case XK_Up:
        case XK_KP_Up:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_N;
          handled = TRUE;
          break;
        case XK_Down:
        case XK_KP_Down:
          display->grab_op = META_GRAB_OP_KEYBOARD_RESIZING_S;
          handled = TRUE;
          break;
        }
      break;

    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:
      g_assert_not_reached ();
      break;
    }

  if (handled)
    {
      meta_window_update_keyboard_resize (window, TRUE);
      return TRUE;
    }

  return FALSE;
}

static gboolean
process_keyboard_resize_grab (MetaDisplay *display,
                              MetaScreen  *screen,
                              MetaWindow  *window,
                              XEvent      *event,
                              KeySym       keysym)
{
  gboolean handled;
  int height_inc;
  int width_inc;
  int width, height;
  gboolean smart_snap;
  int gravity;

  handled = FALSE;

  /* don't care about releases, but eat them, don't end grab */
  if (event->type == KeyRelease)
    return TRUE;

  /* don't end grab on modifier key presses */
  if (is_modifier (display, event->xkey.keycode))
    return TRUE;

  if (keysym == XK_Escape)
    {
      /* End resize and restore to original state.  If not in
       * wireframe mode, we need to do a moveresize now to get the
       * position back to the original.  If we are in wireframe mode,
       * we need to avoid moveresizing to the position of the
       * wireframe.
       */
      if (!display->grab_wireframe_active)
        meta_window_move_resize (display->grab_window,
                                 TRUE,
                                 display->grab_initial_window_pos.x,
                                 display->grab_initial_window_pos.y,
                                 display->grab_initial_window_pos.width,
                                 display->grab_initial_window_pos.height);
      else
        display->grab_was_cancelled = TRUE;

      return FALSE;
    }

  if (process_keyboard_resize_grab_op_change (display, screen, window,
                                              event, keysym))
    return TRUE;

  if (display->grab_wireframe_active)
    {
      width = display->grab_wireframe_rect.width;
      height = display->grab_wireframe_rect.height;
    }
  else
    {
      width = window->rect.width;
      height = window->rect.height;
    }

  gravity = meta_resize_gravity_from_grab_op (display->grab_op);

  smart_snap = (event->xkey.state & ShiftMask) != 0;

#define SMALL_INCREMENT 1
#define NORMAL_INCREMENT 10

  if (smart_snap)
    {
      height_inc = 1;
      width_inc = 1;
    }
  else if (event->xkey.state & ControlMask)
    {
      width_inc = SMALL_INCREMENT;
      height_inc = SMALL_INCREMENT;
    }
  else
    {
      width_inc = NORMAL_INCREMENT;
      height_inc = NORMAL_INCREMENT;
    }

  /* If this is a resize increment window, make the amount we resize
   * the window by match that amount (well, unless snap resizing...)
   */
  if (window->size_hints.width_inc > 1)
    width_inc = window->size_hints.width_inc;
  if (window->size_hints.height_inc > 1)
    height_inc = window->size_hints.height_inc;

  switch (keysym)
    {
    case XK_Up:
    case XK_KP_Up:
      switch (gravity)
        {
        case NorthGravity:
        case NorthWestGravity:
        case NorthEastGravity:
          /* Move bottom edge up */
          height -= height_inc;
          break;

        case SouthGravity:
        case SouthWestGravity:
        case SouthEastGravity:
          /* Move top edge up */
          height += height_inc;
          break;

        case EastGravity:
        case WestGravity:
        case CenterGravity:
          g_assert_not_reached ();
          break;
        }

      handled = TRUE;
      break;

    case XK_Down:
    case XK_KP_Down:
      switch (gravity)
        {
        case NorthGravity:
        case NorthWestGravity:
        case NorthEastGravity:
          /* Move bottom edge down */
          height += height_inc;
          break;

        case SouthGravity:
        case SouthWestGravity:
        case SouthEastGravity:
          /* Move top edge down */
          height -= height_inc;
          break;

        case EastGravity:
        case WestGravity:
        case CenterGravity:
          g_assert_not_reached ();
          break;
        }

      handled = TRUE;
      break;

    case XK_Left:
    case XK_KP_Left:
      switch (gravity)
        {
        case EastGravity:
        case SouthEastGravity:
        case NorthEastGravity:
          /* Move left edge left */
          width += width_inc;
          break;

        case WestGravity:
        case SouthWestGravity:
        case NorthWestGravity:
          /* Move right edge left */
          width -= width_inc;
          break;

        case NorthGravity:
        case SouthGravity:
        case CenterGravity:
          g_assert_not_reached ();
          break;
        }

      handled = TRUE;
      break;

    case XK_Right:
    case XK_KP_Right:
      switch (gravity)
        {
        case EastGravity:
        case SouthEastGravity:
        case NorthEastGravity:
          /* Move left edge right */
          width -= width_inc;
          break;

        case WestGravity:
        case SouthWestGravity:
        case NorthWestGravity:
          /* Move right edge right */
          width += width_inc;
          break;

        case NorthGravity:
        case SouthGravity:
        case CenterGravity:
          g_assert_not_reached ();
          break;
        }

      handled = TRUE;
      break;

    default:
      break;
    }

  /* fixup hack (just paranoia, not sure it's required) */
  if (height < 1)
    height = 1;
  if (width < 1)
    width = 1;

  if (handled)
    {
      MetaRectangle old_rect;
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Computed new window size due to keypress: "
                  "%dx%d, gravity %s\n",
                  width, height, meta_gravity_to_string (gravity));

      if (display->grab_wireframe_active)
        old_rect = display->grab_wireframe_rect;
      else
        old_rect = window->rect;  /* Don't actually care about x,y */

      /* Do any edge resistance/snapping */
      meta_window_edge_resistance_for_resize (window,
                                              old_rect.width,
                                              old_rect.height,
                                              &width,
                                              &height,
                                              gravity,
                                              NULL,
                                              smart_snap,
                                              TRUE);

      if (display->grab_wireframe_active)
        {
          MetaRectangle new_position;
          meta_rectangle_resize_with_gravity (&display->grab_wireframe_rect,
                                              &new_position,
                                              gravity,
                                              width,
                                              height);
          meta_window_update_wireframe (window,
                                        new_position.x,
                                        new_position.y,
                                        new_position.width,
                                        new_position.height);
        }
      else
        {
          /* We don't need to update unless the specified width and height
           * are actually different from what we had before.
           */
          if (window->rect.width != width || window->rect.height != height)
            meta_window_resize_with_gravity (window,
                                             TRUE,
                                             width,
                                             height,
                                             gravity);
        }
      meta_window_update_keyboard_resize (window, FALSE);
    }

  return handled;
}

static gboolean
end_keyboard_grab (MetaDisplay *display,
		   unsigned int keycode)
{
#ifdef HAVE_XKB
  if (display->xkb_base_event_type > 0)
    {
      unsigned int primary_modifier;
      XkbStateRec state;

      primary_modifier = get_primary_modifier (display, display->grab_mask);

      XkbGetState (display->xdisplay, XkbUseCoreKbd, &state);

      if (!(primary_modifier & state.mods))
	return TRUE;
    }
  else
#endif
    {
      if (keycode_is_primary_modifier (display, keycode, display->grab_mask))
	return TRUE;
    }

  return FALSE;
}

static gboolean
process_tab_grab (MetaDisplay *display,
                  MetaScreen  *screen,
                  XEvent      *event,
                  KeySym       keysym)
{
  MetaKeyBindingAction action;
  gboolean popup_not_showing;
  enum { NEXT, PREV, UP, DOWN, LEFT, RIGHT } direction;
  gboolean key_used;
  Window      prev_xwindow;
  MetaWindow *prev_window;

  if (screen != display->grab_screen)
    return FALSE;

  g_return_val_if_fail (screen->tab_popup != NULL, FALSE);

  if (event->type == KeyRelease &&
      end_keyboard_grab (display, event->xkey.keycode))
    {
      /* We're done, move to the new window. */
      Window target_xwindow;
      MetaWindow *target_window;

      target_xwindow =
        (Window) meta_ui_tab_popup_get_selected (screen->tab_popup);
      target_window =
        meta_display_lookup_x_window (display, target_xwindow);

      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Ending tab operation, primary modifier released\n");

      if (target_window)
        {
          target_window->tab_unminimized = FALSE;

          meta_topic (META_DEBUG_KEYBINDINGS,
                      "Activating target window\n");

          meta_topic (META_DEBUG_FOCUS, "Activating %s due to tab popup "
                      "selection and turning mouse_mode off\n",
                      target_window->desc);
          display->mouse_mode = FALSE;
          meta_window_activate (target_window, event->xkey.time);
          if (!target_window->on_all_workspaces)
            meta_workspace_activate (target_window->workspace, event->xkey.time);

          meta_topic (META_DEBUG_KEYBINDINGS,
                      "Ending grab early so we can focus the target window\n");
          meta_display_end_grab_op (display, event->xkey.time);

          return TRUE; /* we already ended the grab */
        }

      return FALSE; /* end grab */
    }

  /* don't care about other releases, but eat them, don't end grab */
  if (event->type == KeyRelease)
    return TRUE;

  /* don't end grab on modifier key presses */
  if (is_modifier (display, event->xkey.keycode))
    return TRUE;

  prev_xwindow = (Window) meta_ui_tab_popup_get_selected (screen->tab_popup);
  prev_window  = meta_display_lookup_x_window (display, prev_xwindow);
  action = display_get_keybinding_action (display,
                                          keysym,
                                          event->xkey.keycode,
                                          display->grab_mask);

  /* Cancel when alt-Escape is pressed during using alt-Tab, and vice
   * versa.
   */
  switch (action)
    {
    case META_KEYBINDING_ACTION_CYCLE_PANELS:
    case META_KEYBINDING_ACTION_CYCLE_WINDOWS:
    case META_KEYBINDING_ACTION_CYCLE_PANELS_BACKWARD:
    case META_KEYBINDING_ACTION_CYCLE_WINDOWS_BACKWARD:
      /* CYCLE_* are traditionally Escape-based actions,
       * and should cancel traditionally Tab-based ones.
       */
       switch (display->grab_op)
        {
        case META_GRAB_OP_KEYBOARD_ESCAPING_NORMAL:
        case META_GRAB_OP_KEYBOARD_ESCAPING_NORMAL_ALL_WORKSPACES:
        case META_GRAB_OP_KEYBOARD_ESCAPING_DOCK:
         /* carry on */
          break;
        default:
          return FALSE;
        }
       break;
    case META_KEYBINDING_ACTION_SWITCH_PANELS:
    case META_KEYBINDING_ACTION_SWITCH_WINDOWS:
    case META_KEYBINDING_ACTION_SWITCH_WINDOWS_ALL:
    case META_KEYBINDING_ACTION_SWITCH_PANELS_BACKWARD:
    case META_KEYBINDING_ACTION_SWITCH_WINDOWS_BACKWARD:
    case META_KEYBINDING_ACTION_SWITCH_WINDOWS_ALL_BACKWARD:
      /* SWITCH_* are traditionally Tab-based actions,
       * and should cancel traditionally Escape-based ones.
       */
      switch (display->grab_op)
        {
        case META_GRAB_OP_KEYBOARD_TABBING_NORMAL:
        case META_GRAB_OP_KEYBOARD_TABBING_NORMAL_ALL_WORKSPACES:
        case META_GRAB_OP_KEYBOARD_TABBING_DOCK:
          /* carry on */
          break;
        default:
          /* Also, we must re-lower and re-minimize whatever window
           * we'd previously raised and unminimized.
           */
          meta_stack_set_positions (screen->stack,
                                    screen->display->grab_old_window_stacking);
          if (prev_window && prev_window->tab_unminimized)
            {
              meta_window_minimize (prev_window);
              prev_window->tab_unminimized = FALSE;
            }
          return FALSE;
        }
      break;
    case META_KEYBINDING_ACTION_CYCLE_GROUP:
    case META_KEYBINDING_ACTION_CYCLE_GROUP_BACKWARD:
    case META_KEYBINDING_ACTION_SWITCH_GROUP:
    case META_KEYBINDING_ACTION_SWITCH_GROUP_BACKWARD:
      switch (display->grab_op)
        {
        case META_GRAB_OP_KEYBOARD_ESCAPING_GROUP:
        case META_GRAB_OP_KEYBOARD_TABBING_GROUP:
          /* carry on */
             break;
        default:
             return FALSE;
        }

      break;
    default:
      break;
    }

  /* !! TO HERE !!
   * alt-f6 during alt-{Tab,Escape} does not end the grab
   * but does change the grab op (and redraws the window,
   * of course).
   * See _{SWITCH,CYCLE}_GROUP.@@@
   */

  popup_not_showing = FALSE;
  key_used = FALSE;
  direction = NEXT;

  switch (action)
    {
    case META_KEYBINDING_ACTION_CYCLE_PANELS:
    case META_KEYBINDING_ACTION_CYCLE_WINDOWS:
    case META_KEYBINDING_ACTION_CYCLE_GROUP:
      popup_not_showing = TRUE;
      key_used = TRUE;
      break;
    case META_KEYBINDING_ACTION_CYCLE_PANELS_BACKWARD:
    case META_KEYBINDING_ACTION_CYCLE_WINDOWS_BACKWARD:
    case META_KEYBINDING_ACTION_CYCLE_GROUP_BACKWARD:
      popup_not_showing = TRUE;
      key_used = TRUE;
      direction = PREV;
      break;
    case META_KEYBINDING_ACTION_SWITCH_PANELS:
    case META_KEYBINDING_ACTION_SWITCH_WINDOWS:
    case META_KEYBINDING_ACTION_SWITCH_WINDOWS_ALL:
    case META_KEYBINDING_ACTION_SWITCH_GROUP:
      key_used = TRUE;
      break;
    case META_KEYBINDING_ACTION_SWITCH_PANELS_BACKWARD:
    case META_KEYBINDING_ACTION_SWITCH_WINDOWS_BACKWARD:
    case META_KEYBINDING_ACTION_SWITCH_WINDOWS_ALL_BACKWARD:
    case META_KEYBINDING_ACTION_SWITCH_GROUP_BACKWARD:
      key_used = TRUE;
      direction = PREV;
      break;
    default:
      break;
    }

  /* Allow use of arrows while in window switching mode */
  if (event->xkey.keycode == ARROW_RIGHT || event->xkey.keycode == ARROW_RIGHT_PAD)
    {
      key_used = TRUE;
      direction = RIGHT;
    }
  else if (event->xkey.keycode == ARROW_LEFT || event->xkey.keycode == ARROW_LEFT_PAD)
    {
      key_used = TRUE;
      direction = LEFT;
    }
  else if (event->xkey.keycode == ARROW_UP || event->xkey.keycode == ARROW_UP_PAD)
    {
      key_used = TRUE;
      direction = UP;
    }
  else if (event->xkey.keycode == ARROW_DOWN || event->xkey.keycode == ARROW_DOWN_PAD)
    {
      key_used = TRUE;
      direction = DOWN;
    }

  if (key_used)
    {
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Key pressed, moving tab focus in popup\n");

      if ((event->xkey.state & ShiftMask) && (direction == NEXT || direction == PREV))
        direction = (direction == NEXT) ? PREV : NEXT;

      if (direction == PREV || direction == LEFT)
        meta_ui_tab_popup_backward (screen->tab_popup);
      else if (direction == NEXT || direction == RIGHT)
        meta_ui_tab_popup_forward (screen->tab_popup);
      else if (direction == DOWN)
        meta_ui_tab_popup_down (screen->tab_popup);
      else if (direction == UP)
        meta_ui_tab_popup_up (screen->tab_popup);

      if (popup_not_showing)
        {
          /* We can't actually change window focus, due to the grab.
           * but raise the window.
           */
          Window target_xwindow;
          MetaWindow *target_window;

          meta_stack_set_positions (screen->stack,
                                    display->grab_old_window_stacking);

          target_xwindow =
            (Window) meta_ui_tab_popup_get_selected (screen->tab_popup);
          target_window =
            meta_display_lookup_x_window (display, target_xwindow);

          if (prev_window && prev_window->tab_unminimized)
            {
              prev_window->tab_unminimized = FALSE;
              meta_window_minimize (prev_window);
            }

          if (target_window)
            {
              meta_window_raise (target_window);
              target_window->tab_unminimized = target_window->minimized;
              meta_window_unminimize (target_window);
            }
        }
    }
  else
    {
      /* end grab */
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Ending tabbing/cycling, uninteresting key pressed\n");

      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Syncing to old stack positions.\n");
      meta_stack_set_positions (screen->stack,
                                screen->display->grab_old_window_stacking);

      if (prev_window && prev_window->tab_unminimized)
        {
          meta_window_minimize (prev_window);
          prev_window->tab_unminimized = FALSE;
        }
    }

  return key_used;
}

static void
handle_switch_to_workspace (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *event_window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  gint which = binding->handler->data;
  MetaWorkspace *workspace;

  if (which == META_MOTION_PREV)
    {
      workspace = screen->prev_workspace;
      if (workspace)
          meta_workspace_activate (workspace, event->xkey.time);
      return;
    }
  
  if (which < 0)
    {
      /* Negative workspace numbers are directions with respect to the
       * current workspace.  While we could insta-switch here by setting
       * workspace to the result of meta_workspace_get_neighbor(), when
       * people request a workspace switch to the left or right via
       * the keyboard, they actually want a tab popup.  So we should
       * go there instead.
       *
       * Note that we're the only caller of that function, so perhaps
       * we should merge with it.
       */
      handle_workspace_switch_or_move (display, screen, event_window, event, binding, FALSE);
      return;
    }

  workspace = meta_screen_get_workspace_by_index (screen, which);

  if (workspace)
    {
      meta_workspace_activate (workspace, event->xkey.time);
    }
  else
    {
      /* We could offer to create it I suppose */
    }
}

static void
error_on_command (int         command_index,
                  const char *command,
                  const char *message,
                  const char *screen_name,
                  guint32     timestamp)
{
  if (command_index < 0)
    meta_warning ("Error on terminal command \"%s\": %s\n", command, message);
  else
    meta_warning ("Error on command %d \"%s\": %s\n",
                  command_index, command, message);

  /*
    croma-dialog said:

    FIXME offer to change the value of the command's cafeconf key
  */

  if (command && strcmp(command, "")!=0)
    {
      char *text = g_strdup_printf (
                                    /* Displayed when a keybinding which is
                                     * supposed to launch a program fails.
                                     */
                                    _("There was an error running "
                                      "<tt>%s</tt>:\n\n%s"),
                                    command,
                                    message);

      meta_show_dialog ("--error",
                        text,
                        NULL,
                        screen_name,
                        NULL, NULL, 0,
                        NULL, NULL);

      g_free (text);

    }
  else
    {
      meta_show_dialog ("--error",
                        message,
                        NULL,
                        screen_name,
                        NULL, NULL, 0,
                        NULL, NULL);
    }
}

static void
set_display_setup_func (void *data)
{
  const char *screen_name = data;
  char *full;

  full = g_strdup_printf ("DISPLAY=%s", screen_name);

  putenv (full);

  /* do not free full, because putenv is lame */
}

static gboolean
meta_spawn_command_line_async_on_screen (const gchar *command_line,
                                         MetaScreen  *screen,
                                         GError     **error)
{
  gboolean retval;
  gchar **argv = NULL;

  g_return_val_if_fail (command_line != NULL, FALSE);

  if (!g_shell_parse_argv (command_line,
                           NULL, &argv,
                           error))
    return FALSE;

  retval = g_spawn_async (NULL,
                          argv,
                          NULL,
                          G_SPAWN_SEARCH_PATH,
                          set_display_setup_func,
                          screen->screen_name,
                          NULL,
                          error);
  g_strfreev (argv);

  return retval;
}


static void
handle_run_command (MetaDisplay    *display,
                    MetaScreen     *screen,
                    MetaWindow     *window,
                    XEvent         *event,
                    MetaKeyBinding *binding)
{
  gint which = binding->handler->data;
  const char *command;
  GError *err;

  command = meta_prefs_get_command (which);

  if (command == NULL)
    {
      char *s;

      meta_topic (META_DEBUG_KEYBINDINGS,
                  "No command %d to run in response to keybinding press\n",
                  which);

      s = g_strdup_printf (_("No command %d has been defined.\n"),
                           which + 1);
      error_on_command (which, NULL, s, screen->screen_name, event->xkey.time);
      g_free (s);

      return;
    }

  err = NULL;
  if (!meta_spawn_command_line_async_on_screen (command, screen, &err))
    {
      error_on_command (which, command, err->message, screen->screen_name, event->xkey.time);

      g_error_free (err);
    }
}


static void
handle_maximize_vertically (MetaDisplay    *display,
                      MetaScreen     *screen,
                      MetaWindow     *window,
                      XEvent         *event,
                      MetaKeyBinding *binding)
{
  if (window->has_resize_func)
    {
      if (window->maximized_vertically)
        meta_window_unmaximize (window, META_MAXIMIZE_VERTICAL);
      else
        meta_window_maximize (window, META_MAXIMIZE_VERTICAL);
    }
}

static void
handle_maximize_horizontally (MetaDisplay    *display,
                       MetaScreen     *screen,
                       MetaWindow     *window,
                       XEvent         *event,
                       MetaKeyBinding *binding)
{
  if (window->has_resize_func)
    {
      if (window->maximized_horizontally)
        meta_window_unmaximize (window, META_MAXIMIZE_HORIZONTAL);
      else
        meta_window_maximize (window, META_MAXIMIZE_HORIZONTAL);
    }
}

/* Move a window to a corner; to_bottom/to_right are FALSE for the
 * top or left edge, or TRUE for the bottom/right edge.  xchange/ychange
 * are FALSE if that dimension is not to be changed, TRUE otherwise.
 * Together they describe which of the four corners, or four sides,
 * is desired.
 */
static void
handle_move_to_corner_backend (MetaDisplay    *display,
           MetaScreen     *screen,
           MetaWindow     *window,
           gboolean        xchange,
           gboolean        ychange,
           gboolean        to_right,
           gboolean        to_bottom)
{
  MetaRectangle work_area;
  MetaRectangle outer;
  int orig_x, orig_y;
  int new_x, new_y;

  meta_window_get_work_area_all_xineramas (window, &work_area);
  meta_window_get_outer_rect (window, &outer);
  meta_window_get_position (window, &orig_x, &orig_y);

  if (xchange) {
    int delta_x;

    if (to_right) {
      delta_x = (work_area.x + work_area.width) - (outer.x + outer.width);
    } else {
      delta_x = work_area.x - outer.x;
    }
    new_x = orig_x + delta_x;
  } else {
    new_x = orig_x;
  }

  if (ychange) {
    int delta_y;

    if (to_bottom) {
      delta_y = (work_area.y + work_area.height) - (outer.y + outer.height);
    } else {
      delta_y = work_area.y - outer.y;
    }
    new_y = orig_y + delta_y;
  } else {
    new_y = orig_y;
  }

  meta_window_move_resize (window,
          TRUE,
          new_x,
          new_y,
          window->rect.width,
          window->rect.height);
}

static void
handle_move_to_corner_nw  (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  handle_move_to_corner_backend (display, screen, window, TRUE, TRUE, FALSE, FALSE);
}

static void
handle_move_to_corner_ne  (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  handle_move_to_corner_backend (display, screen, window, TRUE, TRUE, TRUE, FALSE);
}

static void
handle_move_to_corner_sw  (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  handle_move_to_corner_backend (display, screen, window, TRUE, TRUE, FALSE, TRUE);
}

static void
handle_move_to_corner_se  (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  handle_move_to_corner_backend (display, screen, window, TRUE, TRUE, TRUE, TRUE);
}

static void
handle_move_to_side_n     (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  handle_move_to_corner_backend (display, screen, window, FALSE, TRUE, FALSE, FALSE);
}

static void
handle_move_to_side_s     (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  handle_move_to_corner_backend (display, screen, window, FALSE, TRUE, FALSE, TRUE);
}

static void
handle_move_to_side_e     (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  handle_move_to_corner_backend (display, screen, window, TRUE, FALSE, TRUE, FALSE);
}

static void
handle_move_to_side_w     (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  handle_move_to_corner_backend (display, screen, window, TRUE, FALSE, FALSE, FALSE);
}

static void
handle_move_to_center  (MetaDisplay    *display,
                        MetaScreen     *screen,
                        MetaWindow     *window,
                        XEvent         *event,
                        MetaKeyBinding *binding)
{
  const MetaXineramaScreenInfo* current;
  MetaRectangle work_area;
  MetaRectangle outer;
  int orig_x, orig_y;
  int frame_width, frame_height;

  current = meta_screen_get_xinerama_for_window(screen, window);
  meta_window_get_work_area_for_xinerama (window,
                                          current->number,
                                          &work_area);
  meta_window_get_outer_rect (window, &outer);
  meta_window_get_position (window, &orig_x, &orig_y);

  frame_width = (window->frame ? window->frame->child_x : 0);
  frame_height = (window->frame ? window->frame->child_y : 0);

  meta_window_move_resize (window,
          TRUE,
          work_area.x + (work_area.width +frame_width -outer.width )/2,
          work_area.y + (work_area.height+frame_height-outer.height)/2,
          window->rect.width,
          window->rect.height);
}


static void
handle_move_to_monitor  (MetaDisplay    *display,
                         MetaScreen     *screen,
                         MetaWindow     *window,
                         XEvent         *event,
                         MetaKeyBinding *binding)
{  
  const MetaScreenDirection move_direction = binding->handler->data;
  const MetaXineramaScreenInfo* current;
  const MetaXineramaScreenInfo* neighbour;
  
  current = meta_screen_get_xinerama_for_window(screen, window);
  neighbour = meta_screen_get_xinerama_neighbor(screen, current->number, move_direction);

  if(neighbour == NULL ||
     current->number == neighbour->number)
    return;

  meta_window_move_to_monitor(window,
                              current,
                              neighbour);
}

static gboolean
process_workspace_switch_grab (MetaDisplay *display,
                               MetaScreen  *screen,
                               MetaWindow  *window,
                               XEvent      *event,
                               KeySym       keysym)
{
  MetaWorkspace *workspace;

  if (screen != display->grab_screen)
    return FALSE;

  g_return_val_if_fail (screen->tab_popup != NULL, FALSE);

  if (event->type == KeyRelease &&
      end_keyboard_grab (display, event->xkey.keycode))
    {
      /* We're done, move to the new workspace. */
      MetaWorkspace *target_workspace;

      target_workspace =
        (MetaWorkspace *) meta_ui_tab_popup_get_selected (screen->tab_popup);

      meta_topic (META_DEBUG_KEYBINDINGS,
                  "Ending workspace tab operation, primary modifier released\n");

      if (target_workspace == screen->active_workspace)
        {
          meta_topic (META_DEBUG_KEYBINDINGS,
                      "Ending grab so we can focus on the target workspace\n");
          meta_display_end_grab_op (display, event->xkey.time);


          if(display->grab_op == META_GRAB_OP_KEYBOARD_WORKSPACE_SWITCHING)
            {
              meta_topic (META_DEBUG_KEYBINDINGS,
                          "Focusing default window on target workspace\n");
              meta_workspace_focus_default_window (target_workspace,
                                                   NULL,
                                                   event->xkey.time);
            }

          return TRUE; /* we already ended the grab */
        }

      /* Workspace switching should have already occurred on KeyPress */
      meta_warning ("target_workspace != active_workspace.  Some other event must have occurred.\n");

      return FALSE; /* end grab */
    }

  /* don't care about other releases, but eat them, don't end grab */
  if (event->type == KeyRelease)
    return TRUE;

  /* don't end grab on modifier key presses */
  if (is_modifier (display, event->xkey.keycode))
    return TRUE;

  /* select the next workspace in the tabpopup */
  workspace =
    (MetaWorkspace *) meta_ui_tab_popup_get_selected (screen->tab_popup);

  if (workspace)
    {
      MetaWorkspace *target_workspace;
      MetaKeyBindingAction action;

      action = display_get_keybinding_action (display,
                                              keysym,
                                              event->xkey.keycode,
                                              display->grab_mask);

      switch (action)
        {
        case META_KEYBINDING_ACTION_WORKSPACE_UP:
        case META_KEYBINDING_ACTION_WORKSPACE_MOVE_UP:
          target_workspace = meta_workspace_get_neighbor (workspace,
                                                          META_MOTION_UP);
          break;

        case META_KEYBINDING_ACTION_WORKSPACE_DOWN:
        case META_KEYBINDING_ACTION_WORKSPACE_MOVE_DOWN:
          target_workspace = meta_workspace_get_neighbor (workspace,
                                                          META_MOTION_DOWN);
          break;

        case META_KEYBINDING_ACTION_WORKSPACE_LEFT:
        case META_KEYBINDING_ACTION_WORKSPACE_MOVE_LEFT:
          target_workspace = meta_workspace_get_neighbor (workspace,
                                                          META_MOTION_LEFT);
          break;

        case META_KEYBINDING_ACTION_WORKSPACE_RIGHT:
        case META_KEYBINDING_ACTION_WORKSPACE_MOVE_RIGHT:
          target_workspace = meta_workspace_get_neighbor (workspace,
                                                          META_MOTION_RIGHT);
          break;

        default:
          target_workspace = NULL;
          break;
        }

      if (target_workspace)
        {
          meta_ui_tab_popup_select (screen->tab_popup,
                                    (MetaTabEntryKey) target_workspace);
          meta_topic (META_DEBUG_KEYBINDINGS,
                      "Tab key pressed, moving tab focus in popup\n");

          meta_topic (META_DEBUG_KEYBINDINGS,
                      "Activating target workspace\n");

          if(display->grab_op == META_GRAB_OP_KEYBOARD_WORKSPACE_SWITCHING)
            meta_workspace_activate (target_workspace, event->xkey.time);
          else
            {
              meta_window_change_workspace (window, target_workspace);
              target_workspace->screen->display->mouse_mode = FALSE;
              meta_workspace_activate_with_focus (target_workspace,
                                                  window,
                                                  event->xkey.time);
            }
            
          

          return TRUE; /* we already ended the grab */
        }
    }

  /* end grab */
  meta_topic (META_DEBUG_KEYBINDINGS,
              "Ending workspace tabbing & focusing default window; uninteresting key pressed\n");
  workspace =
    (MetaWorkspace *) meta_ui_tab_popup_get_selected (screen->tab_popup);
  
  if(display->grab_op == META_GRAB_OP_KEYBOARD_WORKSPACE_SWITCHING)
    meta_workspace_focus_default_window (workspace, NULL, event->xkey.time);
  
  return FALSE;
}

static void
handle_show_desktop (MetaDisplay    *display,
                       MetaScreen     *screen,
                       MetaWindow     *window,
                       XEvent         *event,
                       MetaKeyBinding *binding)
{
  if (screen->active_workspace->showing_desktop)
    {
      meta_screen_unshow_desktop (screen);
      meta_workspace_focus_default_window (screen->active_workspace,
                                           NULL,
                                           event->xkey.time);
    }
  else
    meta_screen_show_desktop (screen, event->xkey.time);
}

static void
handle_panel (MetaDisplay    *display,
                         MetaScreen     *screen,
                         MetaWindow     *window,
                         XEvent         *event,
                         MetaKeyBinding *binding)
{
  MetaKeyBindingAction action = binding->handler->data;
  Atom action_atom;
  XClientMessageEvent ev;

  switch (action)
    {
    /* FIXME: The numbers are wrong */
    case META_KEYBINDING_ACTION_PANEL_MAIN_MENU:
      action_atom = display->atom__CAFE_PANEL_ACTION_MAIN_MENU;
      break;
    case META_KEYBINDING_ACTION_PANEL_RUN_DIALOG:
      action_atom = display->atom__CAFE_PANEL_ACTION_RUN_DIALOG;
      break;
    default:
      return;
    }

  ev.type = ClientMessage;
  ev.window = screen->xroot;
  ev.message_type = display->atom__CAFE_PANEL_ACTION;
  ev.format = 32;
  ev.data.l[0] = action_atom;
  ev.data.l[1] = event->xkey.time;

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Sending panel message with timestamp %lu, and turning mouse_mode "
              "off due to keybinding press\n", event->xkey.time);
  display->mouse_mode = FALSE;

  meta_error_trap_push (display);

  /* Release the grab for the panel before sending the event */
  XUngrabKeyboard (display->xdisplay, event->xkey.time);

  XSendEvent (display->xdisplay,
	      screen->xroot,
	      False,
	      StructureNotifyMask,
	      (XEvent*) &ev);

  meta_error_trap_pop (display, FALSE);
}

static void
handle_activate_window_menu (MetaDisplay    *display,
                      MetaScreen     *screen,
                      MetaWindow     *event_window,
                      XEvent         *event,
                      MetaKeyBinding *binding)
{
  if (display->focus_window)
    {
      int x, y;

      meta_window_get_position (display->focus_window,
                                &x, &y);

      if (meta_ui_get_direction() == META_UI_DIRECTION_RTL)
	  x += display->focus_window->rect.width;

      meta_window_show_menu (display->focus_window,
                             x, y,
                             0,
                             event->xkey.time);
    }
}

static MetaGrabOp
tab_op_from_tab_type (MetaTabList type)
{
  switch (type)
    {
    case META_TAB_LIST_NORMAL:
      return META_GRAB_OP_KEYBOARD_TABBING_NORMAL;
    case META_TAB_LIST_NORMAL_ALL_WORKSPACES:
      return META_GRAB_OP_KEYBOARD_TABBING_NORMAL_ALL_WORKSPACES;
    case META_TAB_LIST_DOCKS:
      return META_GRAB_OP_KEYBOARD_TABBING_DOCK;
    case META_TAB_LIST_GROUP:
      return META_GRAB_OP_KEYBOARD_TABBING_GROUP;
    }

  g_assert_not_reached ();

  return 0;
}

static MetaGrabOp
cycle_op_from_tab_type (MetaTabList type)
{
  switch (type)
    {
    case META_TAB_LIST_NORMAL:
      return META_GRAB_OP_KEYBOARD_ESCAPING_NORMAL;
    case META_TAB_LIST_NORMAL_ALL_WORKSPACES:
      return META_GRAB_OP_KEYBOARD_ESCAPING_NORMAL_ALL_WORKSPACES;
    case META_TAB_LIST_DOCKS:
      return META_GRAB_OP_KEYBOARD_ESCAPING_DOCK;
    case META_TAB_LIST_GROUP:
      return META_GRAB_OP_KEYBOARD_ESCAPING_GROUP;
    }

  g_assert_not_reached ();

  return 0;
}

static void
do_choose_window (MetaDisplay    *display,
                  MetaScreen     *screen,
                  MetaWindow     *event_window,
                  XEvent         *event,
                  MetaKeyBinding *binding,
                  gboolean        backward,
                  gboolean        show_popup)
{
  MetaTabList type = binding->handler->data;
  MetaWindow *initial_selection;

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Tab list = %u show_popup = %d\n", type, show_popup);

  /* reverse direction if shift is down */
  if (event->xkey.state & ShiftMask)
    backward = !backward;

  initial_selection = meta_display_get_tab_next (display,
                                                 type,
                                                 screen,
                                                 screen->active_workspace,
                                                 NULL,
                                                 backward);

  /* Note that focus_window may not be in the tab chain, but it's OK */
  if (initial_selection == NULL)
    initial_selection = meta_display_get_tab_current (display,
                                                      type, screen,
                                                      screen->active_workspace);

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Initially selecting window %s\n",
              initial_selection ? initial_selection->desc : "(none)");

  if (initial_selection != NULL)
    {
      if (binding->mask == 0)
        {
          /* If no modifiers, we can't do the "hold down modifier to keep
           * moving" thing, so we just instaswitch by one window.
           */
          meta_topic (META_DEBUG_FOCUS,
                      "Activating %s and turning off mouse_mode due to "
                      "switch/cycle windows with no modifiers\n",
                      initial_selection->desc);
          display->mouse_mode = FALSE;
          meta_window_activate (initial_selection, event->xkey.time);
          if (!initial_selection->on_all_workspaces)
            meta_workspace_activate (initial_selection->workspace, event->xkey.time);
        }
      else if (meta_display_begin_grab_op (display,
                                           screen,
                                           NULL,
                                           show_popup ?
                                           tab_op_from_tab_type (type) :
                                           cycle_op_from_tab_type (type),
                                           FALSE,
                                           FALSE,
                                           0,
                                           binding->mask,
                                           event->xkey.time,
                                           0, 0))
        {
          if (!primary_modifier_still_pressed (display,
                                               binding->mask))
            {
              /* This handles a race where modifier might be released
               * before we establish the grab. must end grab
               * prior to trying to focus a window.
               */
              meta_topic (META_DEBUG_FOCUS,
                          "Ending grab, activating %s, and turning off "
                          "mouse_mode due to switch/cycle windows where "
                          "modifier was released prior to grab\n",
                          initial_selection->desc);
              meta_display_end_grab_op (display, event->xkey.time);
              display->mouse_mode = FALSE;
              meta_window_activate (initial_selection, event->xkey.time);
              if (!initial_selection->on_all_workspaces)
                meta_workspace_activate (initial_selection->workspace, event->xkey.time);
            }
          else
            {
              meta_ui_tab_popup_select (screen->tab_popup,
                                        (MetaTabEntryKey) initial_selection->xwindow);

              if (show_popup)
                meta_ui_tab_popup_set_showing (screen->tab_popup,
                                               TRUE);
              else
                {
                  meta_window_raise (initial_selection);
                  initial_selection->tab_unminimized =
                    initial_selection->minimized;
                  meta_window_unminimize (initial_selection);
                }
            }
        }
    }
}

static void
handle_switch (MetaDisplay    *display,
                    MetaScreen     *screen,
                    MetaWindow     *event_window,
                    XEvent         *event,
                    MetaKeyBinding *binding)
{
  gint backwards = binding->handler->flags & BINDING_IS_REVERSED;

  do_choose_window (display, screen, event_window, event, binding,
                    backwards, TRUE);
}

static void
handle_cycle (MetaDisplay    *display,
                    MetaScreen     *screen,
                    MetaWindow     *event_window,
                    XEvent         *event,
                    MetaKeyBinding *binding)
{
  gint backwards = binding->handler->flags & BINDING_IS_REVERSED;

  do_choose_window (display, screen, event_window, event, binding,
                    backwards, FALSE);
}


static void
handle_toggle_fullscreen  (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->fullscreen)
    meta_window_unmake_fullscreen (window);
  else if (window->has_fullscreen_func)
    meta_window_make_fullscreen (window);
}

static void
handle_toggle_above       (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->wm_state_above)
    meta_window_unmake_above (window);
  else
    meta_window_make_above (window);
}

static void
handle_toggle_tiled (MetaDisplay *display,
                     MetaScreen *screen,
                     MetaWindow *window,
                     XEvent *event,
                     MetaKeyBinding *binding)
{
  MetaTileMode mode = binding->handler->data;
  MetaTileCycle next_cycle;

  /* Check if we're cycling through tile ratios */
  if (meta_prefs_get_allow_tile_cycling ())
    {
      if (window->tile_mode != mode)
        {
          /* If changing tile mode, reset to first tile size */
          next_cycle = META_TILE_CYCLE_50;
        }
      else
        {
          /* Cycle through the different tile sizes: 1/2 -> 1/3 -> 1/4 -> 3/4 -> 2/3 -> Untiled */
          switch (window->tile_cycle)
          {
            case META_TILE_CYCLE_NONE:
              next_cycle = META_TILE_CYCLE_50;
              break;
            case META_TILE_CYCLE_50:
              next_cycle = META_TILE_CYCLE_33;
              break;
            case META_TILE_CYCLE_33:
              next_cycle = META_TILE_CYCLE_25;
              break;
            case META_TILE_CYCLE_25:
              next_cycle = META_TILE_CYCLE_75;
              break;
            case META_TILE_CYCLE_75:
              next_cycle = META_TILE_CYCLE_66;
              break;
            case META_TILE_CYCLE_66:
              next_cycle = META_TILE_CYCLE_NONE;
              break;
            default:
              g_assert_not_reached ();
              break;
          }
        }
    }
  else
    {
      if (META_WINDOW_TILED(window))
        next_cycle = META_TILE_CYCLE_NONE;
      else
        next_cycle = META_TILE_CYCLE_50;
    }

  if (mode == window->tile_mode && next_cycle == META_TILE_CYCLE_NONE)
    {
      window->tile_mode = META_TILE_NONE;
      window->tile_monitor_number = -1;
      window->tile_cycle = META_TILE_CYCLE_NONE;
      meta_window_untile(window);
    }
  else if (meta_window_can_tile (window))
    {
      window->tile_cycle = next_cycle;
      window->tile_mode = mode;
      window->tile_resized = FALSE;
      window->tile_monitor_number = meta_screen_get_xinerama_for_window (window->screen, window)->number;
      /* Maximization constraints beat tiling constraints, so if the window
       * is maximized, tiling won't have any effect unless we unmaximize it
       * horizontally first; rather than calling meta_window_unmaximize(),
       * we just set the flag and rely on meta_window_tile() syncing it to
       * save an additional roundtrip.
       */

      /* If we skip meta_window_unmaximize we have to manually reset the
       * window->saved_maximize flag.
       */
      if (!META_WINDOW_MAXIMIZED (window))
        window->saved_maximize = FALSE;

      window->maximized_horizontally = FALSE;
      window->maximized_vertically = FALSE;
      meta_window_tile (window);
    }
}

static void
handle_toggle_maximized    (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (META_WINDOW_MAXIMIZED (window))
    meta_window_unmaximize (window,
                            META_MAXIMIZE_HORIZONTAL |
                            META_MAXIMIZE_VERTICAL);
  else if (window->has_maximize_func)
    meta_window_maximize (window,
                          META_MAXIMIZE_HORIZONTAL |
                          META_MAXIMIZE_VERTICAL);
}

static void
handle_maximize           (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->has_maximize_func)
    meta_window_maximize (window,
                          META_MAXIMIZE_HORIZONTAL |
                          META_MAXIMIZE_VERTICAL);
}

static void
handle_unmaximize         (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->maximized_vertically ||
      window->maximized_horizontally ||
      META_WINDOW_CORNER_TILED((window)))
    meta_window_unmaximize (window,
                            META_MAXIMIZE_HORIZONTAL |
                            META_MAXIMIZE_VERTICAL);
}

static void
handle_toggle_shaded      (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->shaded)
    meta_window_unshade (window, event->xkey.time);
  else if (window->has_shade_func)
    meta_window_shade (window, event->xkey.time);
}

static void
handle_close              (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->has_close_func)
    meta_window_delete (window, event->xkey.time);
}

static void
handle_minimize        (MetaDisplay    *display,
                        MetaScreen     *screen,
                        MetaWindow     *window,
                        XEvent         *event,
                        MetaKeyBinding *binding)
{
  if (window->has_minimize_func)
    meta_window_minimize (window);
}

static void
handle_begin_move         (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->has_move_func)
    {
      meta_window_begin_grab_op (window,
                                 META_GRAB_OP_KEYBOARD_MOVING,
                                 FALSE,
                                 event->xkey.time);
    }
}

static void
handle_begin_resize       (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->has_resize_func)
    {
      meta_window_begin_grab_op (window,
                                 META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN,
                                 FALSE,
                                 event->xkey.time);
    }
}

static void
handle_toggle_on_all_workspaces (MetaDisplay    *display,
                           MetaScreen     *screen,
                           MetaWindow     *window,
                           XEvent         *event,
                           MetaKeyBinding *binding)
{
  if (window->on_all_workspaces)
    meta_window_unstick (window);
  else
    meta_window_stick (window);
}

static void
handle_move_to_workspace  (MetaDisplay    *display,
                              MetaScreen     *screen,
                              MetaWindow     *window,
                              XEvent         *event,
                              MetaKeyBinding *binding)
{
  gint which = binding->handler->data;
  MetaWorkspace *workspace;

  /* If which is zero or positive, it's a workspace number, and the window
   * should move to the workspace with that number.
   *
   * However, if it's negative, it's a direction with respect to the current
   * position; it's expressed as a member of the MetaMotionDirection enum,
   * all of whose members are negative.  Such a change is called a flip.
   */

  if (window->always_sticky)
    return;

  if (which < 0)
    {
      handle_workspace_switch_or_move (display, screen, window, event, binding, TRUE);
      return;
    }
  
  workspace = meta_screen_get_workspace_by_index (screen, which);

  if (workspace)
    {
      /* Activate second, so the window is never unmapped */
      meta_window_change_workspace (window, workspace);
    }
  else
    {
      /* We could offer to create it I suppose */
    }
}

static void
handle_raise_or_lower (MetaDisplay    *display,
                       MetaScreen     *screen,
		       MetaWindow     *window,
		       XEvent         *event,
		       MetaKeyBinding *binding)
{
  /* Get window at pointer */

  MetaWindow *above = NULL;

  /* Check if top */
  if (meta_stack_get_top (window->screen->stack) == window)
    {
      meta_window_lower (window);
      return;
    }

  /* else check if windows in same layer are intersecting it */

  above = meta_stack_get_above (window->screen->stack, window, TRUE);

  while (above)
    {
      MetaRectangle tmp, win_rect, above_rect;

      if (above->mapped)
        {
          meta_window_get_outer_rect (window, &win_rect);
          meta_window_get_outer_rect (above, &above_rect);

          /* Check if obscured */
          if (meta_rectangle_intersect (&win_rect, &above_rect, &tmp))
            {
              meta_window_raise (window);
              return;
            }
        }

      above = meta_stack_get_above (window->screen->stack, above, TRUE);
    }

  /* window is not obscured */
  meta_window_lower (window);
}

static void
handle_raise (MetaDisplay    *display,
              MetaScreen     *screen,
              MetaWindow     *window,
              XEvent         *event,
              MetaKeyBinding *binding)
{
  meta_window_raise (window);
}

static void
handle_lower (MetaDisplay    *display,
              MetaScreen     *screen,
              MetaWindow     *window,
              XEvent         *event,
              MetaKeyBinding *binding)
{
  meta_window_lower (window);
}

static void
handle_workspace_switch_or_move  (MetaDisplay    *display,
                                  MetaScreen     *screen,
                                  MetaWindow     *window,
                                  XEvent         *event,
                                  MetaKeyBinding *binding,
                                  gboolean        is_move)
{
  gint motion = binding->handler->data;
  unsigned int grab_mask;

  g_assert (motion < 0);

  /* Don't show the ws switcher if we get just one ws */
  if (meta_screen_get_n_workspaces(screen) == 1)
    return;

  meta_topic (META_DEBUG_KEYBINDINGS,
              "Starting tab between workspaces, showing popup\n");

  MetaGrabOp grab_op = is_move ?
    META_GRAB_OP_KEYBOARD_WORKSPACE_MOVING
    : META_GRAB_OP_KEYBOARD_WORKSPACE_SWITCHING;

  /* FIXME should we use binding->mask ? */
  grab_mask = event->xkey.state & ~(display->ignored_modifier_mask);

  if (meta_display_begin_grab_op (display,
                                  screen,
                                  is_move ? window : NULL,
                                  grab_op,
                                  FALSE,
                                  FALSE,
                                  0,
                                  grab_mask,
                                  event->xkey.time,
                                  0, 0))
    {
      MetaWorkspace *next;
      gboolean grabbed_before_release;

      next = meta_workspace_get_neighbor (screen->active_workspace, motion);
      g_assert (next);

      grabbed_before_release = primary_modifier_still_pressed (display, grab_mask);

      meta_topic (META_DEBUG_KEYBINDINGS,
		  "Activating target workspace\n");

      if (!grabbed_before_release)
        {
          /* end the grab right away, modifier possibly released
           * before we could establish the grab and receive the
           * release event. Must end grab before we can switch
           * spaces.
           */
          meta_display_end_grab_op (display, event->xkey.time);
        }

      if(is_move)
        {
          meta_window_change_workspace (window, next);
          meta_topic (META_DEBUG_FOCUS,
                      "Resetting mouse_mode to FALSE due to "
                      "handle_move_to_workspace() call with flip set.\n");
          next->screen->display->mouse_mode = FALSE;
          meta_workspace_activate_with_focus (next,
                                              window,
                                              event->xkey.time);
        }
      else
        meta_workspace_activate (next, event->xkey.time);

      if (grabbed_before_release)
        {
          meta_ui_tab_popup_select (screen->tab_popup, (MetaTabEntryKey) next);

          /* only after selecting proper space */
          meta_ui_tab_popup_set_showing (screen->tab_popup, TRUE);
        }
    }
}

static void
handle_set_spew_mark (MetaDisplay    *display,
                  MetaScreen     *screen,
                  MetaWindow     *window,
                  XEvent         *event,
                  MetaKeyBinding *binding)
{
  meta_verbose ("-- MARK MARK MARK MARK --\n");
}

void
meta_set_keybindings_disabled (gboolean setting)
{
  all_bindings_disabled = setting;
  meta_topic (META_DEBUG_KEYBINDINGS,
              "Keybindings %s\n", all_bindings_disabled ? "disabled" : "enabled");
}

static void
handle_run_terminal (MetaDisplay    *display,
                     MetaScreen     *screen,
                     MetaWindow     *window,
                     XEvent         *event,
                     MetaKeyBinding *binding)
{
  const char *command;
  GError *err;

  command = meta_prefs_get_terminal_command ();

  if (command == NULL)
    {
      char *s;

      meta_topic (META_DEBUG_KEYBINDINGS,
                  "No terminal command to run in response to "
		  "keybinding press\n");

      s = g_strdup_printf (_("No terminal command has been defined.\n"));
      error_on_command (-1, NULL, s, screen->screen_name, event->xkey.time);
      g_free (s);

      return;
    }

  err = NULL;
  if (!meta_spawn_command_line_async_on_screen (command, screen, &err))
    {
      error_on_command (-1, command, err->message, screen->screen_name,
                        event->xkey.time);

      g_error_free (err);
    }
}

static gboolean already_displaying_rename_workspace = FALSE;
#define RENAME_WORKSPACE_BUFSIZE 512

static gboolean
handle_rename_workspace_callback(GIOChannel *ioc, GIOCondition cond, gpointer data)
{
  meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace_callback: called.\n");
  gint *workspace_index = data;
  
  if (!already_displaying_rename_workspace)
    {
      meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace_callback: done, already_displaying_rename_workspace=FALSE\n");
      return FALSE;
    }
  
  if (cond & G_IO_HUP)
    {
      meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace_callback: done.\n");
      g_free(workspace_index);
      already_displaying_rename_workspace = FALSE;
      return FALSE;
    }
  
  
  if (cond & G_IO_ERR )
    {
      meta_warning ("handle_rename_workspace_callback: error. G_IO_ERR.\n");
      g_free(workspace_index);
      already_displaying_rename_workspace = FALSE;
      return FALSE;
    }
  
  if (cond & G_IO_NVAL )
    {
      meta_warning ("handle_rename_workspace_callback: error. G_IO_NVAL.\n");
      g_free(workspace_index);
      already_displaying_rename_workspace = FALSE;
      return FALSE;
    }
  
  
  meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace_callback: workspace_index=%d\n", *workspace_index);
  if (*workspace_index < 0 || *workspace_index > 36)
    {
      meta_warning ("handle_rename_workspace_callback: invalid workspace_index=%d\n", *workspace_index);
      g_free(workspace_index);
      already_displaying_rename_workspace = FALSE;
      return FALSE;
    }
  
  
  if (cond & (!G_IO_IN & !G_IO_PRI))
<--- Boolean result is used in bitwise operation. Clarify expression with parentheses. [+]
Suspicious expression. Boolean result is used in bitwise operation. The operator '!' and the comparison operators have higher precedence than bitwise operators. It is recommended that the expression is clarified with parentheses.
    {
      meta_warning ("handle_rename_workspace_callback: unknown error\n");
      g_free(workspace_index);
      already_displaying_rename_workspace = FALSE;
      return FALSE;
    }
  
  GIOStatus ret;
  
  gchar buf[RENAME_WORKSPACE_BUFSIZE];
  gchar clean_buf[RENAME_WORKSPACE_BUFSIZE];
  gsize buf_len = 0;
  glong clean_buf_len = 0;
  
  memset (buf, 0x00, RENAME_WORKSPACE_BUFSIZE);
  memset (clean_buf, 0x00, RENAME_WORKSPACE_BUFSIZE);

  ret = g_io_channel_read_chars (ioc, buf, RENAME_WORKSPACE_BUFSIZE, &buf_len, NULL);

  if (buf_len <= 0 || ret != G_IO_STATUS_NORMAL)
    {
      meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace_callback: error getting the new name.\n");
      g_free(workspace_index);
      already_displaying_rename_workspace = FALSE;
      return FALSE;
    }
  
  if (!g_utf8_validate (buf, -1, NULL))
    {
      meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace_callback: the string is not utf-8: %s\n", buf);
      g_free(workspace_index);
      already_displaying_rename_workspace = FALSE;
      return FALSE;
    }

  clean_buf_len = g_utf8_strlen (buf, -1);
  if (clean_buf_len <= 1)
    {
      meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace_callback: invalid name.\n");
      g_free(workspace_index);
      already_displaying_rename_workspace = FALSE;
      return FALSE;
    }
  
  g_utf8_strncpy (clean_buf, buf, clean_buf_len - 1);
  meta_prefs_change_workspace_name(*workspace_index, clean_buf);
  already_displaying_rename_workspace = FALSE;
  
  return TRUE;
}

static void
handle_rename_workspace(MetaDisplay *display,
                        MetaScreen *screen,
                        MetaWindow *window,
                        XEvent *event,
                        MetaKeyBinding *binding)
{
  gchar *window_title, *window_content;
  const char *entry_text;
  GPid dialog_pid;
  
  meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace: called.\n");
  
  if (already_displaying_rename_workspace)
    {
      meta_topic (META_DEBUG_KEYBINDINGS,
                  "handle_rename_workspace: return, already_displaying_rename_workspace=TRUE.\n");
      return;
    }
  
  window_title = g_strdup_printf (_("<tt>Rename Workspace</tt>"));
  window_content = g_strdup_printf (_("New Workspace Name:"));
  
  gint *workspace_index = g_malloc (sizeof (gint));
  *workspace_index = meta_workspace_index (screen->active_workspace);
  meta_topic (META_DEBUG_KEYBINDINGS, "handle_rename_workspace: workspace_index=%d\n", *workspace_index);
  
  entry_text = meta_prefs_get_workspace_name(*workspace_index);
  dialog_pid = meta_show_entry_dialog (window_content,
                                       workspace_index,
                                       entry_text,
                                       screen->screen_name,
                                       _("OK"), _("Cancel"),
                                       0,
                                       handle_rename_workspace_callback);
  
  g_free (window_title);
  g_free (window_content);
  if (dialog_pid > 0)
    {
      already_displaying_rename_workspace = TRUE;
    }
  else
    {
      g_free(workspace_index);
    }
}