openbox/screen.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    screen.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "debug.h"
  21 #include "openbox.h"
  22 #include "dock.h"
  23 #include "grab.h"
  24 #include "startupnotify.h"
  25 #include "moveresize.h"
  26 #include "config.h"
  27 #include "screen.h"
  28 #include "client.h"
  29 #include "session.h"
  30 #include "frame.h"
  31 #include "event.h"
  32 #include "focus.h"
  33 #include "focus_cycle.h"
  34 #include "popup.h"
  35 #include "version.h"
  36 #include "obrender/render.h"
  37 #include "gettext.h"
  38 #include "obt/display.h"
  39 #include "obt/xqueue.h"
  40 #include "obt/prop.h"
  41 #include "obt/mainloop.h"
  42
  43 #include <X11/Xlib.h>
  44 #ifdef HAVE_UNISTD_H
  45 #  include <sys/types.h>
  46 #  include <unistd.h>
  47 #endif
  48 #include <assert.h>
  49
  50 /*! The event mask to grab on the root window */
  51 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  52                         EnterWindowMask | LeaveWindowMask | \
  53                         SubstructureRedirectMask | FocusChangeMask | \
  54                         ButtonPressMask | ButtonReleaseMask)
  55
  56 static gboolean screen_validate_layout(ObDesktopLayout *l);
  57 static gboolean replace_wm(void);
  58 static void     screen_tell_ksplash(void);
  59 static void     screen_fallback_focus(void);
  60
  61 guint           screen_num_desktops;
  62 guint           screen_num_monitors;
  63 guint           screen_desktop;
  64 guint           screen_last_desktop;
  65 gboolean        screen_showing_desktop;
  66 ObDesktopLayout screen_desktop_layout;
  67 gchar         **screen_desktop_names;
  68 Window          screen_support_win;
  69 Time            screen_desktop_user_time = CurrentTime;
  70
  71 static Size     screen_physical_size;
  72 static guint    screen_old_desktop;
  73 static gboolean screen_desktop_timeout = TRUE;
  74 /*! An array of desktops, holding an array of areas per monitor */
  75 static Rect  *monitor_area = NULL;
  76 /*! An array of desktops, holding an array of struts */
  77 static GSList *struts_top = NULL;
  78 static GSList *struts_left = NULL;
  79 static GSList *struts_right = NULL;
  80 static GSList *struts_bottom = NULL;
  81
  82 static ObPagerPopup *desktop_popup;
  83 static gboolean      desktop_popup_perm;
  84
  85 /*! The number of microseconds that you need to be on a desktop before it will
  86   replace the remembered "last desktop" */
  87 #define REMEMBER_LAST_DESKTOP_TIME 750000
  88
  89 static gboolean replace_wm(void)
  90 {
  91     gchar *wm_sn;
  92     Atom wm_sn_atom;
  93     Window current_wm_sn_owner;
  94     Time timestamp;
  95
  96     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  97     wm_sn_atom = XInternAtom(obt_display, wm_sn, FALSE);
  98     g_free(wm_sn);
  99
 100     current_wm_sn_owner = XGetSelectionOwner(obt_display, wm_sn_atom);
 101     if (current_wm_sn_owner == screen_support_win)
 102         current_wm_sn_owner = None;
 103     if (current_wm_sn_owner) {
 104         if (!ob_replace_wm) {
 105             g_message(_("A window manager is already running on screen %d"),
 106                       ob_screen);
 107             return FALSE;
 108         }
 109         obt_display_ignore_errors(TRUE);
 110
 111         /* We want to find out when the current selection owner dies */
 112         XSelectInput(obt_display, current_wm_sn_owner, StructureNotifyMask);
 113         XSync(obt_display, FALSE);
 114
 115         obt_display_ignore_errors(FALSE);
 116         if (obt_display_error_occured)
 117             current_wm_sn_owner = None;
 118     }
 119
 120     timestamp = event_time();
 121
 122     XSetSelectionOwner(obt_display, wm_sn_atom, screen_support_win,
 123                        timestamp);
 124
 125     if (XGetSelectionOwner(obt_display, wm_sn_atom) != screen_support_win) {
 126         g_message(_("Could not acquire window manager selection on screen %d"),
 127                   ob_screen);
 128         return FALSE;
 129     }
 130
 131     /* Wait for old window manager to go away */
 132     if (current_wm_sn_owner) {
 133       gulong wait = 0;
 134       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 135       ObtXQueueWindowType wt;
 136
 137       wt.window = current_wm_sn_owner;
 138       wt.type = DestroyNotify;
 139
 140       while (wait < timeout) {
 141           /* Checks the local queue and incoming events for this event */
 142           if (xqueue_exists_local(xqueue_match_window_type, &wt))
 143               break;
 144           g_usleep(G_USEC_PER_SEC / 10);
 145           wait += G_USEC_PER_SEC / 10;
 146       }
 147
 148       if (wait >= timeout) {
 149           g_message(_("The WM on screen %d is not exiting"), ob_screen);
 150           return FALSE;
 151       }
 152     }
 153
 154     /* Send client message indicating that we are now the WM */
 155     obt_prop_message(ob_screen, obt_root(ob_screen), OBT_PROP_ATOM(MANAGER),
 156                      timestamp, wm_sn_atom, screen_support_win, 0, 0,
 157                      SubstructureNotifyMask);
 158
 159     return TRUE;
 160 }
 161
 162 gboolean screen_annex(void)
 163 {
 164     XSetWindowAttributes attrib;
 165     pid_t pid;
 166     gint i, num_support;
 167     gulong *supported;
 168
 169     /* create the netwm support window */
 170     attrib.override_redirect = TRUE;
 171     attrib.event_mask = PropertyChangeMask;
 172     screen_support_win = XCreateWindow(obt_display, obt_root(ob_screen),
 173                                        -100, -100, 1, 1, 0,
 174                                        CopyFromParent, InputOutput,
 175                                        CopyFromParent,
 176                                        CWEventMask | CWOverrideRedirect,
 177                                        &attrib);
 178     XMapWindow(obt_display, screen_support_win);
 179     XLowerWindow(obt_display, screen_support_win);
 180
 181     if (!replace_wm()) {
 182         XDestroyWindow(obt_display, screen_support_win);
 183         return FALSE;
 184     }
 185
 186     obt_display_ignore_errors(TRUE);
 187     XSelectInput(obt_display, obt_root(ob_screen), ROOT_EVENTMASK);
 188     obt_display_ignore_errors(FALSE);
 189     if (obt_display_error_occured) {
 190         g_message(_("A window manager is already running on screen %d"),
 191                   ob_screen);
 192
 193         XDestroyWindow(obt_display, screen_support_win);
 194         return FALSE;
 195     }
 196
 197     screen_set_root_cursor();
 198
 199     /* set the OPENBOX_PID hint */
 200     pid = getpid();
 201     OBT_PROP_SET32(obt_root(ob_screen), OPENBOX_PID, CARDINAL, pid);
 202
 203     /* set supporting window */
 204     OBT_PROP_SET32(obt_root(ob_screen),
 205                    NET_SUPPORTING_WM_CHECK, WINDOW, screen_support_win);
 206
 207     /* set properties on the supporting window */
 208     OBT_PROP_SETS(screen_support_win, NET_WM_NAME, utf8, "Openbox");
 209     OBT_PROP_SET32(screen_support_win, NET_SUPPORTING_WM_CHECK,
 210                    WINDOW, screen_support_win);
 211
 212     /* set the _NET_SUPPORTED_ATOMS hint */
 213
 214     /* this is all the atoms after NET_SUPPORTED in the ObtPropAtoms enum */
 215     num_support = OBT_PROP_NUM_ATOMS - OBT_PROP_NET_SUPPORTED - 1;
 216     i = 0;
 217     supported = g_new(gulong, num_support);
 218     supported[i++] = OBT_PROP_ATOM(NET_SUPPORTING_WM_CHECK);
 219     supported[i++] = OBT_PROP_ATOM(NET_WM_FULL_PLACEMENT);
 220     supported[i++] = OBT_PROP_ATOM(NET_CURRENT_DESKTOP);
 221     supported[i++] = OBT_PROP_ATOM(NET_NUMBER_OF_DESKTOPS);
 222     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_GEOMETRY);
 223     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_VIEWPORT);
 224     supported[i++] = OBT_PROP_ATOM(NET_ACTIVE_WINDOW);
 225     supported[i++] = OBT_PROP_ATOM(NET_WORKAREA);
 226     supported[i++] = OBT_PROP_ATOM(NET_CLIENT_LIST);
 227     supported[i++] = OBT_PROP_ATOM(NET_CLIENT_LIST_STACKING);
 228     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_NAMES);
 229     supported[i++] = OBT_PROP_ATOM(NET_CLOSE_WINDOW);
 230     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_LAYOUT);
 231     supported[i++] = OBT_PROP_ATOM(NET_SHOWING_DESKTOP);
 232     supported[i++] = OBT_PROP_ATOM(NET_WM_NAME);
 233     supported[i++] = OBT_PROP_ATOM(NET_WM_VISIBLE_NAME);
 234     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON_NAME);
 235     supported[i++] = OBT_PROP_ATOM(NET_WM_VISIBLE_ICON_NAME);
 236     supported[i++] = OBT_PROP_ATOM(NET_WM_DESKTOP);
 237     supported[i++] = OBT_PROP_ATOM(NET_WM_STRUT);
 238     supported[i++] = OBT_PROP_ATOM(NET_WM_STRUT_PARTIAL);
 239     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON);
 240     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON_GEOMETRY);
 241     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE);
 242     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DESKTOP);
 243     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DOCK);
 244     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_TOOLBAR);
 245     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_MENU);
 246     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_UTILITY);
 247     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_SPLASH);
 248     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DIALOG);
 249     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_NORMAL);
 250     supported[i++] = OBT_PROP_ATOM(NET_WM_ALLOWED_ACTIONS);
 251     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MOVE);
 252     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_RESIZE);
 253     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MINIMIZE);
 254     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_SHADE);
 255     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MAXIMIZE_HORZ);
 256     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MAXIMIZE_VERT);
 257     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_FULLSCREEN);
 258     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_CHANGE_DESKTOP);
 259     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_CLOSE);
 260     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_ABOVE);
 261     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_BELOW);
 262     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE);
 263     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MODAL);
 264     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MAXIMIZED_VERT);
 265     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MAXIMIZED_HORZ);
 266     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SHADED);
 267     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SKIP_TASKBAR);
 268     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SKIP_PAGER);
 269     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_HIDDEN);
 270     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_FULLSCREEN);
 271     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_ABOVE);
 272     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_BELOW);
 273     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_DEMANDS_ATTENTION);
 274     supported[i++] = OBT_PROP_ATOM(NET_MOVERESIZE_WINDOW);
 275     supported[i++] = OBT_PROP_ATOM(NET_WM_MOVERESIZE);
 276     supported[i++] = OBT_PROP_ATOM(NET_WM_USER_TIME);
 277 /*
 278     supported[i++] = OBT_PROP_ATOM(NET_WM_USER_TIME_WINDOW);
 279 */
 280     supported[i++] = OBT_PROP_ATOM(NET_FRAME_EXTENTS);
 281     supported[i++] = OBT_PROP_ATOM(NET_REQUEST_FRAME_EXTENTS);
 282     supported[i++] = OBT_PROP_ATOM(NET_RESTACK_WINDOW);
 283     supported[i++] = OBT_PROP_ATOM(NET_STARTUP_ID);
 284 #ifdef SYNC
 285     supported[i++] = OBT_PROP_ATOM(NET_WM_SYNC_REQUEST);
 286     supported[i++] = OBT_PROP_ATOM(NET_WM_SYNC_REQUEST_COUNTER);
 287 #endif
 288     supported[i++] = OBT_PROP_ATOM(NET_WM_PID);
 289     supported[i++] = OBT_PROP_ATOM(NET_WM_PING);
 290
 291     supported[i++] = OBT_PROP_ATOM(KDE_WM_CHANGE_STATE);
 292     supported[i++] = OBT_PROP_ATOM(KDE_NET_WM_FRAME_STRUT);
 293     supported[i++] = OBT_PROP_ATOM(KDE_NET_WM_WINDOW_TYPE_OVERRIDE);
 294
 295     supported[i++] = OBT_PROP_ATOM(OB_WM_ACTION_UNDECORATE);
 296     supported[i++] = OBT_PROP_ATOM(OB_WM_STATE_UNDECORATED);
 297     supported[i++] = OBT_PROP_ATOM(OPENBOX_PID);
 298     supported[i++] = OBT_PROP_ATOM(OB_THEME);
 299     supported[i++] = OBT_PROP_ATOM(OB_CONFIG_FILE);
 300     supported[i++] = OBT_PROP_ATOM(OB_CONTROL);
 301     supported[i++] = OBT_PROP_ATOM(OB_VERSION);
 302     supported[i++] = OBT_PROP_ATOM(OB_APP_ROLE);
 303     supported[i++] = OBT_PROP_ATOM(OB_APP_TITLE);
 304     supported[i++] = OBT_PROP_ATOM(OB_APP_NAME);
 305     supported[i++] = OBT_PROP_ATOM(OB_APP_CLASS);
 306     supported[i++] = OBT_PROP_ATOM(OB_APP_TYPE);
 307     g_assert(i == num_support);
 308
 309     OBT_PROP_SETA32(obt_root(ob_screen),
 310                     NET_SUPPORTED, ATOM, supported, num_support);
 311     g_free(supported);
 312
 313     OBT_PROP_SETS(RootWindow(obt_display, ob_screen), OB_VERSION, utf8,
 314                   OPENBOX_VERSION);
 315
 316     screen_tell_ksplash();
 317
 318     return TRUE;
 319 }
 320
 321 static void screen_tell_ksplash(void)
 322 {
 323     XEvent e;
 324     char **argv;
 325
 326     argv = g_new(gchar*, 6);
 327     argv[0] = g_strdup("dcop");
 328     argv[1] = g_strdup("ksplash");
 329     argv[2] = g_strdup("ksplash");
 330     argv[3] = g_strdup("upAndRunning(QString)");
 331     argv[4] = g_strdup("wm started");
 332     argv[5] = NULL;
 333
 334     /* tell ksplash through the dcop server command line interface */
 335     g_spawn_async(NULL, argv, NULL,
 336                   G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
 337                   G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
 338                   NULL, NULL, NULL, NULL);
 339     g_strfreev(argv);
 340
 341     /* i'm not sure why we do this, kwin does it, but ksplash doesn't seem to
 342        hear it anyways. perhaps it is for old ksplash. or new ksplash. or
 343        something. oh well. */
 344     e.xclient.type = ClientMessage;
 345     e.xclient.display = obt_display;
 346     e.xclient.window = obt_root(ob_screen);
 347     e.xclient.message_type =
 348         XInternAtom(obt_display, "_KDE_SPLASH_PROGRESS", False);
 349     e.xclient.format = 8;
 350     strcpy(e.xclient.data.b, "wm started");
 351     XSendEvent(obt_display, obt_root(ob_screen),
 352                False, SubstructureNotifyMask, &e);
 353 }
 354
 355 void screen_startup(gboolean reconfig)
 356 {
 357     gchar **names = NULL;
 358     guint32 d;
 359     gboolean namesexist = FALSE;
 360
 361     desktop_popup = pager_popup_new();
 362     desktop_popup_perm = FALSE;
 363     pager_popup_height(desktop_popup, POPUP_HEIGHT);
 364
 365     if (reconfig) {
 366         /* update the pager popup's width */
 367         pager_popup_text_width_to_strings(desktop_popup,
 368                                           screen_desktop_names,
 369                                           screen_num_desktops);
 370         return;
 371     }
 372
 373     /* get the initial size */
 374     screen_resize();
 375
 376     /* have names already been set for the desktops? */
 377     if (OBT_PROP_GETSS(obt_root(ob_screen), NET_DESKTOP_NAMES, utf8, &names)) {
 378         g_strfreev(names);
 379         namesexist = TRUE;
 380     }
 381
 382     /* if names don't exist and we have session names, set those.
 383        do this stuff BEFORE setting the number of desktops, because that
 384        will create default names for them
 385     */
 386     if (!namesexist && session_desktop_names != NULL) {
 387         guint i, numnames;
 388         GSList *it;
 389
 390         /* get the desktop names */
 391         numnames = g_slist_length(session_desktop_names);
 392         names = g_new(gchar*, numnames + 1);
 393         names[numnames] = NULL;
 394         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
 395             names[i] = g_strdup(it->data);
 396
 397         /* set the root window property */
 398         OBT_PROP_SETSS(obt_root(ob_screen),
 399                        NET_DESKTOP_NAMES, utf8, (const gchar*const*)names);
 400
 401         g_strfreev(names);
 402     }
 403
 404     /* set the number of desktops, if it's not already set.
 405
 406        this will also set the default names from the config file up for
 407        desktops that don't have names yet */
 408     screen_num_desktops = 0;
 409     if (OBT_PROP_GET32(obt_root(ob_screen),
 410                        NET_NUMBER_OF_DESKTOPS, CARDINAL, &d))
 411     {
 412         if (d != config_desktops_num) {
 413             /* TRANSLATORS: If you need to specify a different order of the
 414                arguments, you can use %1$d for the first one and %2$d for the
 415                second one. For example,
 416                "The current session has %2$d desktops, but Openbox is configured for %1$d ..." */
 417             g_warning(ngettext("Openbox is configured for %d desktop, but the current session has %d.  Overriding the Openbox configuration.", "Openbox is configured for %d desktops, but the current session has %d.  Overriding the Openbox configuration.", config_desktops_num),
 418                       config_desktops_num, d);
 419         }
 420         screen_set_num_desktops(d);
 421     }
 422     /* restore from session if possible */
 423     else if (session_num_desktops)
 424         screen_set_num_desktops(session_num_desktops);
 425     else
 426         screen_set_num_desktops(config_desktops_num);
 427
 428     screen_desktop = screen_num_desktops;  /* something invalid */
 429     /* start on the current desktop when a wm was already running */
 430     if (OBT_PROP_GET32(obt_root(ob_screen),
 431                        NET_CURRENT_DESKTOP, CARDINAL, &d) &&
 432         d < screen_num_desktops)
 433     {
 434         screen_set_desktop(d, FALSE);
 435     } else if (session_desktop >= 0)
 436         screen_set_desktop(MIN((guint)session_desktop,
 437                                screen_num_desktops), FALSE);
 438     else
 439         screen_set_desktop(MIN(config_screen_firstdesk,
 440                                screen_num_desktops) - 1, FALSE);
 441     screen_last_desktop = screen_desktop;
 442
 443     /* don't start in showing-desktop mode */
 444     screen_showing_desktop = FALSE;
 445     OBT_PROP_SET32(obt_root(ob_screen),
 446                    NET_SHOWING_DESKTOP, CARDINAL, screen_showing_desktop);
 447
 448     if (session_desktop_layout_present &&
 449         screen_validate_layout(&session_desktop_layout))
 450     {
 451         screen_desktop_layout = session_desktop_layout;
 452     }
 453     else
 454         screen_update_layout();
 455 }
 456
 457 void screen_shutdown(gboolean reconfig)
 458 {
 459     pager_popup_free(desktop_popup);
 460
 461     if (reconfig)
 462         return;
 463
 464     XSelectInput(obt_display, obt_root(ob_screen), NoEventMask);
 465
 466     /* we're not running here no more! */
 467     OBT_PROP_ERASE(obt_root(ob_screen), OPENBOX_PID);
 468     /* not without us */
 469     OBT_PROP_ERASE(obt_root(ob_screen), NET_SUPPORTED);
 470     /* don't keep this mode */
 471     OBT_PROP_ERASE(obt_root(ob_screen), NET_SHOWING_DESKTOP);
 472
 473     XDestroyWindow(obt_display, screen_support_win);
 474
 475     g_strfreev(screen_desktop_names);
 476     screen_desktop_names = NULL;
 477 }
 478
 479 void screen_resize(void)
 480 {
 481     static gint oldw = 0, oldh = 0;
 482     gint w, h;
 483     GList *it;
 484     gulong geometry[2];
 485
 486     w = WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen));
 487     h = HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen));
 488
 489     if (w == oldw && h == oldh) return;
 490
 491     oldw = w; oldh = h;
 492
 493     /* Set the _NET_DESKTOP_GEOMETRY hint */
 494     screen_physical_size.width = geometry[0] = w;
 495     screen_physical_size.height = geometry[1] = h;
 496     OBT_PROP_SETA32(obt_root(ob_screen),
 497                     NET_DESKTOP_GEOMETRY, CARDINAL, geometry, 2);
 498
 499     if (ob_state() != OB_STATE_RUNNING)
 500         return;
 501
 502     screen_update_areas();
 503     dock_configure();
 504
 505     for (it = client_list; it; it = g_list_next(it))
 506         client_move_onscreen(it->data, FALSE);
 507 }
 508
 509 void screen_set_num_desktops(guint num)
 510 {
 511     gulong *viewport;
 512     GList *it, *stacking_copy;
 513
 514     g_assert(num > 0);
 515
 516     if (screen_num_desktops == num) return;
 517
 518     screen_num_desktops = num;
 519     OBT_PROP_SET32(obt_root(ob_screen), NET_NUMBER_OF_DESKTOPS, CARDINAL, num);
 520
 521     /* set the viewport hint */
 522     viewport = g_new0(gulong, num * 2);
 523     OBT_PROP_SETA32(obt_root(ob_screen),
 524                     NET_DESKTOP_VIEWPORT, CARDINAL, viewport, num * 2);
 525     g_free(viewport);
 526
 527     /* the number of rows/columns will differ */
 528     screen_update_layout();
 529
 530     /* move windows on desktops that will no longer exist!
 531        make a copy of the list cuz we're changing it */
 532     stacking_copy = g_list_copy(stacking_list);
 533     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 534         if (WINDOW_IS_CLIENT(it->data)) {
 535             ObClient *c = it->data;
 536             if (c->desktop != DESKTOP_ALL && c->desktop >= num)
 537                 client_set_desktop(c, num - 1, FALSE, TRUE);
 538             /* raise all the windows that are on the current desktop which
 539                is being merged */
 540             else if (screen_desktop == num - 1 &&
 541                      (c->desktop == DESKTOP_ALL ||
 542                       c->desktop == screen_desktop))
 543                 stacking_raise(CLIENT_AS_WINDOW(c));
 544         }
 545     }
 546     g_list_free(stacking_copy);
 547
 548     /* change our struts/area to match (after moving windows) */
 549     screen_update_areas();
 550
 551     /* may be some unnamed desktops that we need to fill in with names
 552        (after updating the areas so the popup can resize) */
 553     screen_update_desktop_names();
 554
 555     /* change our desktop if we're on one that no longer exists! */
 556     if (screen_desktop >= screen_num_desktops)
 557         screen_set_desktop(num - 1, TRUE);
 558 }
 559
 560 static void screen_fallback_focus(void)
 561 {
 562     ObClient *c;
 563     gboolean allow_omni;
 564
 565     /* only allow omnipresent windows to get focus on desktop change if
 566        an omnipresent window is already focused (it'll keep focus probably, but
 567        maybe not depending on mouse-focus options) */
 568     allow_omni = focus_client && (client_normal(focus_client) &&
 569                                   focus_client->desktop == DESKTOP_ALL);
 570
 571     /* the client moved there already so don't move focus. prevent flicker
 572        on sendtodesktop + follow */
 573     if (focus_client && focus_client->desktop == screen_desktop)
 574         return;
 575
 576     /* have to try focus here because when you leave an empty desktop
 577        there is no focus out to watch for. also, we have different rules
 578        here. we always allow it to look under the mouse pointer if
 579        config_focus_last is FALSE
 580
 581        do this before hiding the windows so if helper windows are coming
 582        with us, they don't get hidden
 583     */
 584     if ((c = focus_fallback(TRUE, !config_focus_last, allow_omni,
 585                             !allow_omni)))
 586     {
 587         /* only do the flicker reducing stuff ahead of time if we are going
 588            to call xsetinputfocus on the window ourselves. otherwise there is
 589            no guarantee the window will actually take focus.. */
 590         if (c->can_focus) {
 591             /* reduce flicker by hiliting now rather than waiting for the
 592                server FocusIn event */
 593             frame_adjust_focus(c->frame, TRUE);
 594             /* do this here so that if you switch desktops to a window with
 595                helper windows then the helper windows won't flash */
 596             client_bring_helper_windows(c);
 597         }
 598     }
 599 }
 600
 601 static gboolean last_desktop_func(gpointer data)
 602 {
 603     screen_desktop_timeout = TRUE;
 604     return FALSE;
 605 }
 606
 607 void screen_set_desktop(guint num, gboolean dofocus)
 608 {
 609     GList *it;
 610     guint previous;
 611     gulong ignore_start;
 612
 613     g_assert(num < screen_num_desktops);
 614
 615     previous = screen_desktop;
 616     screen_desktop = num;
 617
 618     if (previous == num) return;
 619
 620     OBT_PROP_SET32(obt_root(ob_screen), NET_CURRENT_DESKTOP, CARDINAL, num);
 621
 622     /* This whole thing decides when/how to save the screen_last_desktop so
 623        that it can be restored later if you want */
 624     if (screen_desktop_timeout) {
 625         /* If screen_desktop_timeout is true, then we've been on this desktop
 626            long enough and we can save it as the last desktop. */
 627
 628         if (screen_last_desktop == previous)
 629             /* this is the startup state only */
 630             screen_old_desktop = screen_desktop;
 631         else {
 632             /* save the "last desktop" as the "old desktop" */
 633             screen_old_desktop = screen_last_desktop;
 634             /* save the desktop we're coming from as the "last desktop" */
 635             screen_last_desktop = previous;
 636         }
 637     }
 638     else {
 639         /* If screen_desktop_timeout is false, then we just got to this desktop
 640            and we are moving away again. */
 641
 642         if (screen_desktop == screen_last_desktop) {
 643             /* If we are moving to the "last desktop" .. */
 644             if (previous == screen_old_desktop) {
 645                 /* .. from the "old desktop", change the last desktop to
 646                    be where we are coming from */
 647                 screen_last_desktop = screen_old_desktop;
 648             }
 649             else if (screen_last_desktop == screen_old_desktop) {
 650                 /* .. and also to the "old desktop", change the "last
 651                    desktop" to be where we are coming from */
 652                 screen_last_desktop = previous;
 653             }
 654             else {
 655                 /* .. from some other desktop, then set the "last desktop" to
 656                    be the saved "old desktop", i.e. where we were before the
 657                    "last desktop" */
 658                 screen_last_desktop = screen_old_desktop;
 659             }
 660         }
 661         else {
 662             /* If we are moving to any desktop besides the "last desktop"..
 663                (this is the normal case) */
 664             if (screen_desktop == screen_old_desktop) {
 665                 /* If moving to the "old desktop", which is not the
 666                    "last desktop", don't save anything */
 667             }
 668             else if (previous == screen_old_desktop) {
 669                 /* If moving from the "old desktop", and not to the
 670                    "last desktop", don't save anything */
 671             }
 672             else if (screen_last_desktop == screen_old_desktop) {
 673                 /* If the "last desktop" is the same as "old desktop" and
 674                    you're not moving to the "last desktop" then save where
 675                    we're coming from as the "last desktop" */
 676                 screen_last_desktop = previous;
 677             }
 678             else {
 679                 /* If the "last desktop" is different from the "old desktop"
 680                    and you're not moving to the "last desktop", then don't save
 681                    anything */
 682             }
 683         }
 684     }
 685     screen_desktop_timeout = FALSE;
 686     obt_main_loop_timeout_remove(ob_main_loop, last_desktop_func);
 687     obt_main_loop_timeout_add(ob_main_loop, REMEMBER_LAST_DESKTOP_TIME,
 688                               last_desktop_func, NULL, NULL, NULL);
 689
 690     ob_debug("Moving to desktop %d", num+1);
 691
 692     if (ob_state() == OB_STATE_RUNNING)
 693         screen_show_desktop_popup(screen_desktop, FALSE);
 694
 695     /* ignore enter events caused by the move */
 696     ignore_start = event_start_ignore_all_enters();
 697
 698     if (moveresize_client)
 699         client_set_desktop(moveresize_client, num, TRUE, FALSE);
 700
 701     /* show windows before hiding the rest to lessen the enter/leave events */
 702
 703     /* show windows from top to bottom */
 704     for (it = stacking_list; it; it = g_list_next(it)) {
 705         if (WINDOW_IS_CLIENT(it->data)) {
 706             ObClient *c = it->data;
 707             client_show(c);
 708         }
 709     }
 710
 711     if (dofocus) screen_fallback_focus();
 712
 713     /* hide windows from bottom to top */
 714     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 715         if (WINDOW_IS_CLIENT(it->data)) {
 716             ObClient *c = it->data;
 717             if (client_hide(c)) {
 718                 if (c == focus_client) {
 719                     /* c was focused and we didn't do fallback clearly so make
 720                        sure openbox doesnt still consider the window focused.
 721                        this happens when using NextWindow with allDesktops,
 722                        since it doesnt want to move focus on desktop change,
 723                        but the focus is not going to stay with the current
 724                        window, which has now disappeared.
 725                        only do this if the client was actually hidden,
 726                        otherwise it can keep focus. */
 727                     focus_set_client(NULL);
 728                 }
 729             }
 730         }
 731     }
 732
 733     focus_cycle_addremove(NULL, TRUE);
 734
 735     event_end_ignore_all_enters(ignore_start);
 736
 737     if (event_source_time() != CurrentTime)
 738         screen_desktop_user_time = event_source_time();
 739 }
 740
 741 void screen_add_desktop(gboolean current)
 742 {
 743     gulong ignore_start;
 744
 745     /* ignore enter events caused by this */
 746     ignore_start = event_start_ignore_all_enters();
 747
 748     screen_set_num_desktops(screen_num_desktops+1);
 749
 750     /* move all the clients over */
 751     if (current) {
 752         GList *it;
 753
 754         for (it = client_list; it; it = g_list_next(it)) {
 755             ObClient *c = it->data;
 756             if (c->desktop != DESKTOP_ALL && c->desktop >= screen_desktop &&
 757                 /* don't move direct children, they'll be moved with their
 758                    parent - which will have to be on the same desktop */
 759                 !client_direct_parent(c))
 760             {
 761                 ob_debug("moving window %s", c->title);
 762                 client_set_desktop(c, c->desktop+1, FALSE, TRUE);
 763             }
 764         }
 765     }
 766
 767     event_end_ignore_all_enters(ignore_start);
 768 }
 769
 770 void screen_remove_desktop(gboolean current)
 771 {
 772     guint rmdesktop, movedesktop;
 773     GList *it, *stacking_copy;
 774     gulong ignore_start;
 775
 776     if (screen_num_desktops <= 1) return;
 777
 778     /* ignore enter events caused by this */
 779     ignore_start = event_start_ignore_all_enters();
 780
 781     /* what desktop are we removing and moving to? */
 782     if (current)
 783         rmdesktop = screen_desktop;
 784     else
 785         rmdesktop = screen_num_desktops - 1;
 786     if (rmdesktop < screen_num_desktops - 1)
 787         movedesktop = rmdesktop + 1;
 788     else
 789         movedesktop = rmdesktop;
 790
 791     /* make a copy of the list cuz we're changing it */
 792     stacking_copy = g_list_copy(stacking_list);
 793     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 794         if (WINDOW_IS_CLIENT(it->data)) {
 795             ObClient *c = it->data;
 796             guint d = c->desktop;
 797             if (d != DESKTOP_ALL && d >= movedesktop &&
 798                 /* don't move direct children, they'll be moved with their
 799                    parent - which will have to be on the same desktop */
 800                 !client_direct_parent(c))
 801             {
 802                 ob_debug("moving window %s", c->title);
 803                 client_set_desktop(c, c->desktop - 1, TRUE, TRUE);
 804             }
 805             /* raise all the windows that are on the current desktop which
 806                is being merged */
 807             if ((screen_desktop == rmdesktop - 1 ||
 808                  screen_desktop == rmdesktop) &&
 809                 (d == DESKTOP_ALL || d == screen_desktop))
 810             {
 811                 stacking_raise(CLIENT_AS_WINDOW(c));
 812                 ob_debug("raising window %s", c->title);
 813             }
 814         }
 815     }
 816     g_list_free(stacking_copy);
 817
 818     /* fallback focus like we're changing desktops */
 819     if (screen_desktop < screen_num_desktops - 1) {
 820         screen_fallback_focus();
 821         ob_debug("fake desktop change");
 822     }
 823
 824     screen_set_num_desktops(screen_num_desktops-1);
 825
 826     event_end_ignore_all_enters(ignore_start);
 827 }
 828
 829 static void get_row_col(guint d, guint *r, guint *c)
 830 {
 831     switch (screen_desktop_layout.orientation) {
 832     case OB_ORIENTATION_HORZ:
 833         switch (screen_desktop_layout.start_corner) {
 834         case OB_CORNER_TOPLEFT:
 835             *r = d / screen_desktop_layout.columns;
 836             *c = d % screen_desktop_layout.columns;
 837             break;
 838         case OB_CORNER_BOTTOMLEFT:
 839             *r = screen_desktop_layout.rows - 1 -
 840                 d / screen_desktop_layout.columns;
 841             *c = d % screen_desktop_layout.columns;
 842             break;
 843         case OB_CORNER_TOPRIGHT:
 844             *r = d / screen_desktop_layout.columns;
 845             *c = screen_desktop_layout.columns - 1 -
 846                 d % screen_desktop_layout.columns;
 847             break;
 848         case OB_CORNER_BOTTOMRIGHT:
 849             *r = screen_desktop_layout.rows - 1 -
 850                 d / screen_desktop_layout.columns;
 851             *c = screen_desktop_layout.columns - 1 -
 852                 d % screen_desktop_layout.columns;
 853             break;
 854         }
 855         break;
 856     case OB_ORIENTATION_VERT:
 857         switch (screen_desktop_layout.start_corner) {
 858         case OB_CORNER_TOPLEFT:
 859             *r = d % screen_desktop_layout.rows;
 860             *c = d / screen_desktop_layout.rows;
 861             break;
 862         case OB_CORNER_BOTTOMLEFT:
 863             *r = screen_desktop_layout.rows - 1 -
 864                 d % screen_desktop_layout.rows;
 865             *c = d / screen_desktop_layout.rows;
 866             break;
 867         case OB_CORNER_TOPRIGHT:
 868             *r = d % screen_desktop_layout.rows;
 869             *c = screen_desktop_layout.columns - 1 -
 870                 d / screen_desktop_layout.rows;
 871             break;
 872         case OB_CORNER_BOTTOMRIGHT:
 873             *r = screen_desktop_layout.rows - 1 -
 874                 d % screen_desktop_layout.rows;
 875             *c = screen_desktop_layout.columns - 1 -
 876                 d / screen_desktop_layout.rows;
 877             break;
 878         }
 879         break;
 880     }
 881 }
 882
 883 static guint translate_row_col(guint r, guint c)
 884 {
 885     switch (screen_desktop_layout.orientation) {
 886     case OB_ORIENTATION_HORZ:
 887         switch (screen_desktop_layout.start_corner) {
 888         case OB_CORNER_TOPLEFT:
 889             return r % screen_desktop_layout.rows *
 890                 screen_desktop_layout.columns +
 891                 c % screen_desktop_layout.columns;
 892         case OB_CORNER_BOTTOMLEFT:
 893             return (screen_desktop_layout.rows - 1 -
 894                     r % screen_desktop_layout.rows) *
 895                 screen_desktop_layout.columns +
 896                 c % screen_desktop_layout.columns;
 897         case OB_CORNER_TOPRIGHT:
 898             return r % screen_desktop_layout.rows *
 899                 screen_desktop_layout.columns +
 900                 (screen_desktop_layout.columns - 1 -
 901                  c % screen_desktop_layout.columns);
 902         case OB_CORNER_BOTTOMRIGHT:
 903             return (screen_desktop_layout.rows - 1 -
 904                     r % screen_desktop_layout.rows) *
 905                 screen_desktop_layout.columns +
 906                 (screen_desktop_layout.columns - 1 -
 907                  c % screen_desktop_layout.columns);
 908         }
 909     case OB_ORIENTATION_VERT:
 910         switch (screen_desktop_layout.start_corner) {
 911         case OB_CORNER_TOPLEFT:
 912             return c % screen_desktop_layout.columns *
 913                 screen_desktop_layout.rows +
 914                 r % screen_desktop_layout.rows;
 915         case OB_CORNER_BOTTOMLEFT:
 916             return c % screen_desktop_layout.columns *
 917                 screen_desktop_layout.rows +
 918                 (screen_desktop_layout.rows - 1 -
 919                  r % screen_desktop_layout.rows);
 920         case OB_CORNER_TOPRIGHT:
 921             return (screen_desktop_layout.columns - 1 -
 922                     c % screen_desktop_layout.columns) *
 923                 screen_desktop_layout.rows +
 924                 r % screen_desktop_layout.rows;
 925         case OB_CORNER_BOTTOMRIGHT:
 926             return (screen_desktop_layout.columns - 1 -
 927                     c % screen_desktop_layout.columns) *
 928                 screen_desktop_layout.rows +
 929                 (screen_desktop_layout.rows - 1 -
 930                  r % screen_desktop_layout.rows);
 931         }
 932     }
 933     g_assert_not_reached();
 934     return 0;
 935 }
 936
 937 static gboolean hide_desktop_popup_func(gpointer data)
 938 {
 939     pager_popup_hide(desktop_popup);
 940     return FALSE; /* don't repeat */
 941 }
 942
 943 void screen_show_desktop_popup(guint d, gboolean perm)
 944 {
 945     const Rect *a;
 946
 947     /* 0 means don't show the popup */
 948     if (!config_desktop_popup_time) return;
 949
 950     a = screen_physical_area_primary(FALSE);
 951     pager_popup_position(desktop_popup, CenterGravity,
 952                          a->x + a->width / 2, a->y + a->height / 2);
 953     pager_popup_icon_size_multiplier(desktop_popup,
 954                                      (screen_desktop_layout.columns /
 955                                       screen_desktop_layout.rows) / 2,
 956                                      (screen_desktop_layout.rows/
 957                                       screen_desktop_layout.columns) / 2);
 958     pager_popup_max_width(desktop_popup,
 959                           MAX(a->width/3, POPUP_WIDTH));
 960     pager_popup_show(desktop_popup, screen_desktop_names[d], d);
 961
 962     obt_main_loop_timeout_remove(ob_main_loop, hide_desktop_popup_func);
 963     if (!perm && !desktop_popup_perm)
 964         /* only hide if its not already being show permanently */
 965         obt_main_loop_timeout_add(ob_main_loop,
 966                                   config_desktop_popup_time * 1000,
 967                                   hide_desktop_popup_func, desktop_popup,
 968                                   g_direct_equal, NULL);
 969     if (perm)
 970         desktop_popup_perm = TRUE;
 971 }
 972
 973 void screen_hide_desktop_popup(void)
 974 {
 975     obt_main_loop_timeout_remove_data(ob_main_loop, hide_desktop_popup_func,
 976                                       desktop_popup, FALSE);
 977     pager_popup_hide(desktop_popup);
 978     desktop_popup_perm = FALSE;
 979 }
 980
 981 guint screen_find_desktop(guint from, ObDirection dir,
 982                           gboolean wrap, gboolean linear)
 983 {
 984     guint r, c;
 985     guint d;
 986
 987     d = from;
 988     get_row_col(d, &r, &c);
 989     if (linear) {
 990         switch (dir) {
 991         case OB_DIRECTION_EAST:
 992             if (d < screen_num_desktops - 1)
 993                 ++d;
 994             else if (wrap)
 995                 d = 0;
 996             else
 997                 return from;
 998             break;
 999         case OB_DIRECTION_WEST:
1000             if (d > 0)
1001                 --d;
1002             else if (wrap)
1003                 d = screen_num_desktops - 1;
1004             else
1005                 return from;
1006             break;
1007         default:
1008             g_assert_not_reached();
1009             return from;
1010         }
1011     } else {
1012         switch (dir) {
1013         case OB_DIRECTION_EAST:
1014             ++c;
1015             if (c >= screen_desktop_layout.columns) {
1016                 if (wrap)
1017                     c = 0;
1018                 else
1019                     return from;
1020             }
1021             d = translate_row_col(r, c);
1022             if (d >= screen_num_desktops) {
1023                 if (wrap)
1024                     ++c;
1025                 else
1026                     return from;
1027             }
1028             break;
1029         case OB_DIRECTION_WEST:
1030             --c;
1031             if (c >= screen_desktop_layout.columns) {
1032                 if (wrap)
1033                     c = screen_desktop_layout.columns - 1;
1034                 else
1035                     return from;
1036             }
1037             d = translate_row_col(r, c);
1038             if (d >= screen_num_desktops) {
1039                 if (wrap)
1040                     --c;
1041                 else
1042                     return from;
1043             }
1044             break;
1045         case OB_DIRECTION_SOUTH:
1046             ++r;
1047             if (r >= screen_desktop_layout.rows) {
1048                 if (wrap)
1049                     r = 0;
1050                 else
1051                     return from;
1052             }
1053             d = translate_row_col(r, c);
1054             if (d >= screen_num_desktops) {
1055                 if (wrap)
1056                     ++r;
1057                 else
1058                     return from;
1059             }
1060             break;
1061         case OB_DIRECTION_NORTH:
1062             --r;
1063             if (r >= screen_desktop_layout.rows) {
1064                 if (wrap)
1065                     r = screen_desktop_layout.rows - 1;
1066                 else
1067                     return from;
1068             }
1069             d = translate_row_col(r, c);
1070             if (d >= screen_num_desktops) {
1071                 if (wrap)
1072                     --r;
1073                 else
1074                     return from;
1075             }
1076             break;
1077         default:
1078             g_assert_not_reached();
1079             return from;
1080         }
1081
1082         d = translate_row_col(r, c);
1083     }
1084     return d;
1085 }
1086
1087 static gboolean screen_validate_layout(ObDesktopLayout *l)
1088 {
1089     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
1090         return FALSE;
1091
1092     /* fill in a zero rows/columns */
1093     if (l->columns == 0) {
1094         l->columns = screen_num_desktops / l->rows;
1095         if (l->rows * l->columns < screen_num_desktops)
1096             l->columns++;
1097         if (l->rows * l->columns >= screen_num_desktops + l->columns)
1098             l->rows--;
1099     } else if (l->rows == 0) {
1100         l->rows = screen_num_desktops / l->columns;
1101         if (l->columns * l->rows < screen_num_desktops)
1102             l->rows++;
1103         if (l->columns * l->rows >= screen_num_desktops + l->rows)
1104             l->columns--;
1105     }
1106
1107     /* bounds checking */
1108     if (l->orientation == OB_ORIENTATION_HORZ) {
1109         l->columns = MIN(screen_num_desktops, l->columns);
1110         l->rows = MIN(l->rows,
1111                       (screen_num_desktops + l->columns - 1) / l->columns);
1112         l->columns = screen_num_desktops / l->rows +
1113             !!(screen_num_desktops % l->rows);
1114     } else {
1115         l->rows = MIN(screen_num_desktops, l->rows);
1116         l->columns = MIN(l->columns,
1117                          (screen_num_desktops + l->rows - 1) / l->rows);
1118         l->rows = screen_num_desktops / l->columns +
1119             !!(screen_num_desktops % l->columns);
1120     }
1121     return TRUE;
1122 }
1123
1124 void screen_update_layout(void)
1125
1126 {
1127     ObDesktopLayout l;
1128     guint32 *data;
1129     guint num;
1130
1131     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
1132     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
1133     screen_desktop_layout.rows = 1;
1134     screen_desktop_layout.columns = screen_num_desktops;
1135
1136     if (OBT_PROP_GETA32(obt_root(ob_screen),
1137                         NET_DESKTOP_LAYOUT, CARDINAL, &data, &num)) {
1138         if (num == 3 || num == 4) {
1139
1140             if (data[0] == OBT_PROP_ATOM(NET_WM_ORIENTATION_VERT))
1141                 l.orientation = OB_ORIENTATION_VERT;
1142             else if (data[0] == OBT_PROP_ATOM(NET_WM_ORIENTATION_HORZ))
1143                 l.orientation = OB_ORIENTATION_HORZ;
1144             else
1145                 return;
1146
1147             if (num < 4)
1148                 l.start_corner = OB_CORNER_TOPLEFT;
1149             else {
1150                 if (data[3] == OBT_PROP_ATOM(NET_WM_TOPLEFT))
1151                     l.start_corner = OB_CORNER_TOPLEFT;
1152                 else if (data[3] == OBT_PROP_ATOM(NET_WM_TOPRIGHT))
1153                     l.start_corner = OB_CORNER_TOPRIGHT;
1154                 else if (data[3] == OBT_PROP_ATOM(NET_WM_BOTTOMRIGHT))
1155                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
1156                 else if (data[3] == OBT_PROP_ATOM(NET_WM_BOTTOMLEFT))
1157                     l.start_corner = OB_CORNER_BOTTOMLEFT;
1158                 else
1159                     return;
1160             }
1161
1162             l.columns = data[1];
1163             l.rows = data[2];
1164
1165             if (screen_validate_layout(&l))
1166                 screen_desktop_layout = l;
1167
1168             g_free(data);
1169         }
1170     }
1171 }
1172
1173 void screen_update_desktop_names(void)
1174 {
1175     guint i;
1176
1177     /* empty the array */
1178     g_strfreev(screen_desktop_names);
1179     screen_desktop_names = NULL;
1180
1181     if (OBT_PROP_GETSS(obt_root(ob_screen),
1182                        NET_DESKTOP_NAMES, utf8, &screen_desktop_names))
1183         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
1184     else
1185         i = 0;
1186     if (i < screen_num_desktops) {
1187         GSList *it;
1188
1189         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
1190                                        screen_num_desktops + 1);
1191         screen_desktop_names[screen_num_desktops] = NULL;
1192
1193         it = g_slist_nth(config_desktops_names, i);
1194
1195         for (; i < screen_num_desktops; ++i) {
1196             if (it && ((char*)it->data)[0]) /* not empty */
1197                 /* use the names from the config file when possible */
1198                 screen_desktop_names[i] = g_strdup(it->data);
1199             else
1200                 /* make up a nice name if it's not though */
1201                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
1202                                                           i + 1);
1203             if (it) it = g_slist_next(it);
1204         }
1205
1206         /* if we changed any names, then set the root property so we can
1207            all agree on the names */
1208         OBT_PROP_SETSS(obt_root(ob_screen), NET_DESKTOP_NAMES,
1209                        utf8, (const gchar*const*)screen_desktop_names);
1210     }
1211
1212     /* resize the pager for these names */
1213     pager_popup_text_width_to_strings(desktop_popup,
1214                                       screen_desktop_names,
1215                                       screen_num_desktops);
1216 }
1217
1218 void screen_show_desktop(gboolean show, ObClient *show_only)
1219 {
1220     GList *it;
1221
1222     if (show == screen_showing_desktop) return; /* no change */
1223
1224     screen_showing_desktop = show;
1225
1226     if (show) {
1227         /* hide windows bottom to top */
1228         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1229             if (WINDOW_IS_CLIENT(it->data)) {
1230                 ObClient *client = it->data;
1231                 client_showhide(client);
1232             }
1233         }
1234     }
1235     else {
1236         /* restore windows top to bottom */
1237         for (it = stacking_list; it; it = g_list_next(it)) {
1238             if (WINDOW_IS_CLIENT(it->data)) {
1239                 ObClient *client = it->data;
1240                 if (client_should_show(client)) {
1241                     if (!show_only || client == show_only)
1242                         client_show(client);
1243                     else
1244                         client_iconify(client, TRUE, FALSE, TRUE);
1245                 }
1246             }
1247         }
1248     }
1249
1250     if (show) {
1251         /* focus the desktop */
1252         for (it = focus_order; it; it = g_list_next(it)) {
1253             ObClient *c = it->data;
1254             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1255                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1256                 client_focus(it->data))
1257                 break;
1258         }
1259     }
1260     else if (!show_only) {
1261         ObClient *c;
1262
1263         if ((c = focus_fallback(TRUE, FALSE, TRUE, FALSE))) {
1264             /* only do the flicker reducing stuff ahead of time if we are going
1265                to call xsetinputfocus on the window ourselves. otherwise there
1266                is no guarantee the window will actually take focus.. */
1267             if (c->can_focus) {
1268                 /* reduce flicker by hiliting now rather than waiting for the
1269                    server FocusIn event */
1270                 frame_adjust_focus(c->frame, TRUE);
1271             }
1272         }
1273     }
1274
1275     show = !!show; /* make it boolean */
1276     OBT_PROP_SET32(obt_root(ob_screen), NET_SHOWING_DESKTOP, CARDINAL, show);
1277 }
1278
1279 void screen_install_colormap(ObClient *client, gboolean install)
1280 {
1281     if (client == NULL || client->colormap == None) {
1282         if (install)
1283             XInstallColormap(obt_display, RrColormap(ob_rr_inst));
1284         else
1285             XUninstallColormap(obt_display, RrColormap(ob_rr_inst));
1286     } else {
1287         obt_display_ignore_errors(TRUE);
1288         if (install)
1289             XInstallColormap(obt_display, client->colormap);
1290         else
1291             XUninstallColormap(obt_display, client->colormap);
1292         obt_display_ignore_errors(FALSE);
1293     }
1294 }
1295
1296 typedef struct {
1297     guint desktop;
1298     StrutPartial *strut;
1299 } ObScreenStrut;
1300
1301 #define RESET_STRUT_LIST(sl) \
1302     while (sl) { \
1303         g_slice_free(ObScreenStrut, (sl)->data); \
1304         sl = g_slist_delete_link(sl, sl); \
1305     }
1306
1307 #define ADD_STRUT_TO_LIST(sl, d, s) \
1308 { \
1309     ObScreenStrut *ss = g_slice_new(ObScreenStrut); \
1310     ss->desktop = d; \
1311     ss->strut = s;  \
1312     sl = g_slist_prepend(sl, ss); \
1313 }
1314
1315 #define VALIDATE_STRUTS(sl, side, max) \
1316 { \
1317     GSList *it; \
1318     for (it = sl; it; it = g_slist_next(it)) { \
1319       ObScreenStrut *ss = it->data; \
1320       ss->strut->side = MIN(max, ss->strut->side); \
1321     } \
1322 }
1323
1324 static void get_xinerama_screens(Rect **xin_areas, guint *nxin)
1325 {
1326     guint i;
1327     gint n, l, r, t, b;
1328 #ifdef XINERAMA
1329     XineramaScreenInfo *info;
1330 #endif
1331
1332     if (ob_debug_xinerama) {
1333         gint w = WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen));
1334         gint h = HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen));
1335         *nxin = 2;
1336         *xin_areas = g_new(Rect, *nxin + 1);
1337         RECT_SET((*xin_areas)[0], 0, 0, w/2, h);
1338         RECT_SET((*xin_areas)[1], w/2, 0, w-(w/2), h);
1339     }
1340 #ifdef XINERAMA
1341     else if (obt_display_extension_xinerama &&
1342              (info = XineramaQueryScreens(obt_display, &n))) {
1343         *nxin = n;
1344         *xin_areas = g_new(Rect, *nxin + 1);
1345         for (i = 0; i < *nxin; ++i)
1346             RECT_SET((*xin_areas)[i], info[i].x_org, info[i].y_org,
1347                      info[i].width, info[i].height);
1348         XFree(info);
1349     }
1350 #endif
1351     else {
1352         *nxin = 1;
1353         *xin_areas = g_new(Rect, *nxin + 1);
1354         RECT_SET((*xin_areas)[0], 0, 0,
1355                  WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen)),
1356                  HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen)));
1357     }
1358
1359     /* returns one extra with the total area in it */
1360     l = (*xin_areas)[0].x;
1361     t = (*xin_areas)[0].y;
1362     r = (*xin_areas)[0].x + (*xin_areas)[0].width - 1;
1363     b = (*xin_areas)[0].y + (*xin_areas)[0].height - 1;
1364     for (i = 1; i < *nxin; ++i) {
1365         l = MIN(l, (*xin_areas)[i].x);
1366         t = MIN(l, (*xin_areas)[i].y);
1367         r = MAX(r, (*xin_areas)[i].x + (*xin_areas)[i].width - 1);
1368         b = MAX(b, (*xin_areas)[i].y + (*xin_areas)[i].height - 1);
1369     }
1370     RECT_SET((*xin_areas)[*nxin], l, t, r - l + 1, b - t + 1);
1371 }
1372
1373 void screen_update_areas(void)
1374 {
1375     guint i;
1376     gulong *dims;
1377     GList *it, *onscreen;
1378
1379     /* collect the clients that are on screen */
1380     onscreen = NULL;
1381     for (it = client_list; it; it = g_list_next(it)) {
1382         if (client_monitor(it->data) != screen_num_monitors)
1383             onscreen = g_list_prepend(onscreen, it->data);
1384     }
1385
1386     g_free(monitor_area);
1387     get_xinerama_screens(&monitor_area, &screen_num_monitors);
1388
1389     /* set up the user-specified margins */
1390     config_margins.top_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1391     config_margins.top_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1392     config_margins.bottom_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1393     config_margins.bottom_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1394     config_margins.left_start = RECT_TOP(monitor_area[screen_num_monitors]);
1395     config_margins.left_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1396     config_margins.right_start = RECT_TOP(monitor_area[screen_num_monitors]);
1397     config_margins.right_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1398
1399     RESET_STRUT_LIST(struts_left);
1400     RESET_STRUT_LIST(struts_top);
1401     RESET_STRUT_LIST(struts_right);
1402     RESET_STRUT_LIST(struts_bottom);
1403
1404     /* collect the struts */
1405     for (it = client_list; it; it = g_list_next(it)) {
1406         ObClient *c = it->data;
1407         if (c->strut.left)
1408             ADD_STRUT_TO_LIST(struts_left, c->desktop, &c->strut);
1409         if (c->strut.top)
1410             ADD_STRUT_TO_LIST(struts_top, c->desktop, &c->strut);
1411         if (c->strut.right)
1412             ADD_STRUT_TO_LIST(struts_right, c->desktop, &c->strut);
1413         if (c->strut.bottom)
1414             ADD_STRUT_TO_LIST(struts_bottom, c->desktop, &c->strut);
1415     }
1416     if (dock_strut.left)
1417         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &dock_strut);
1418     if (dock_strut.top)
1419         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &dock_strut);
1420     if (dock_strut.right)
1421         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &dock_strut);
1422     if (dock_strut.bottom)
1423         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &dock_strut);
1424
1425     if (config_margins.left)
1426         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &config_margins);
1427     if (config_margins.top)
1428         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &config_margins);
1429     if (config_margins.right)
1430         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &config_margins);
1431     if (config_margins.bottom)
1432         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &config_margins);
1433
1434     VALIDATE_STRUTS(struts_left, left,
1435                     monitor_area[screen_num_monitors].width / 2);
1436     VALIDATE_STRUTS(struts_right, right,
1437                     monitor_area[screen_num_monitors].width / 2);
1438     VALIDATE_STRUTS(struts_top, top,
1439                     monitor_area[screen_num_monitors].height / 2);
1440     VALIDATE_STRUTS(struts_bottom, bottom,
1441                     monitor_area[screen_num_monitors].height / 2);
1442
1443     dims = g_new(gulong, 4 * screen_num_desktops);
1444     for (i = 0; i < screen_num_desktops; ++i) {
1445         Rect *area = screen_area(i, SCREEN_AREA_ALL_MONITORS, NULL);
1446         dims[i*4+0] = area->x;
1447         dims[i*4+1] = area->y;
1448         dims[i*4+2] = area->width;
1449         dims[i*4+3] = area->height;
1450         g_slice_free(Rect, area);
1451     }
1452
1453     /* set the legacy workarea hint to the union of all the monitors */
1454     OBT_PROP_SETA32(obt_root(ob_screen), NET_WORKAREA, CARDINAL,
1455                     dims, 4 * screen_num_desktops);
1456
1457     /* the area has changed, adjust all the windows if they need it */
1458     for (it = onscreen; it; it = g_list_next(it)) {
1459         client_move_onscreen(it->data, FALSE);
1460         client_reconfigure(it->data, FALSE);
1461     }
1462
1463     g_free(dims);
1464 }
1465
1466 #if 0
1467 Rect* screen_area_all_monitors(guint desktop)
1468 {
1469     guint i;
1470     Rect *a;
1471
1472     a = screen_area_monitor(desktop, 0);
1473
1474     /* combine all the monitors together */
1475     for (i = 1; i < screen_num_monitors; ++i) {
1476         Rect *m = screen_area_monitor(desktop, i);
1477         gint l, r, t, b;
1478
1479         l = MIN(RECT_LEFT(*a), RECT_LEFT(*m));
1480         t = MIN(RECT_TOP(*a), RECT_TOP(*m));
1481         r = MAX(RECT_RIGHT(*a), RECT_RIGHT(*m));
1482         b = MAX(RECT_BOTTOM(*a), RECT_BOTTOM(*m));
1483
1484         RECT_SET(*a, l, t, r - l + 1, b - t + 1);
1485
1486         g_free(m);
1487     }
1488
1489     return a;
1490 }
1491 #endif
1492
1493 #define STRUT_LEFT_IN_SEARCH(s, search) \
1494     (RANGES_INTERSECT(search->y, search->height, \
1495                       s->left_start, s->left_end - s->left_start + 1))
1496 #define STRUT_RIGHT_IN_SEARCH(s, search) \
1497     (RANGES_INTERSECT(search->y, search->height, \
1498                       s->right_start, s->right_end - s->right_start + 1))
1499 #define STRUT_TOP_IN_SEARCH(s, search) \
1500     (RANGES_INTERSECT(search->x, search->width, \
1501                       s->top_start, s->top_end - s->top_start + 1))
1502 #define STRUT_BOTTOM_IN_SEARCH(s, search) \
1503     (RANGES_INTERSECT(search->x, search->width, \
1504                       s->bottom_start, s->bottom_end - s->bottom_start + 1))
1505
1506 #define STRUT_LEFT_IGNORE(s, us, search) \
1507     (head == SCREEN_AREA_ALL_MONITORS && us && \
1508      RECT_LEFT(monitor_area[i]) + s->left > RECT_LEFT(*search))
1509 #define STRUT_RIGHT_IGNORE(s, us, search) \
1510     (head == SCREEN_AREA_ALL_MONITORS && us && \
1511      RECT_RIGHT(monitor_area[i]) - s->right < RECT_RIGHT(*search))
1512 #define STRUT_TOP_IGNORE(s, us, search) \
1513     (head == SCREEN_AREA_ALL_MONITORS && us && \
1514      RECT_TOP(monitor_area[i]) + s->top > RECT_TOP(*search))
1515 #define STRUT_BOTTOM_IGNORE(s, us, search) \
1516     (head == SCREEN_AREA_ALL_MONITORS && us && \
1517      RECT_BOTTOM(monitor_area[i]) - s->bottom < RECT_BOTTOM(*search))
1518
1519 Rect* screen_area(guint desktop, guint head, Rect *search)
1520 {
1521     Rect *a;
1522     GSList *it;
1523     gint l, r, t, b;
1524     guint i, d;
1525     gboolean us = search != NULL; /* user provided search */
1526
1527     g_assert(desktop < screen_num_desktops || desktop == DESKTOP_ALL);
1528     g_assert(head < screen_num_monitors || head == SCREEN_AREA_ONE_MONITOR ||
1529              head == SCREEN_AREA_ALL_MONITORS);
1530     g_assert(!(head == SCREEN_AREA_ONE_MONITOR && search == NULL));
1531
1532     /* find any struts for this monitor
1533        which will be affecting the search area.
1534     */
1535
1536     /* search everything if search is null */
1537     if (!search) {
1538         if (head < screen_num_monitors) search = &monitor_area[head];
1539         else search = &monitor_area[screen_num_monitors];
1540     }
1541     if (head == SCREEN_AREA_ONE_MONITOR) head = screen_find_monitor(search);
1542
1543     /* al is "all left" meaning the furthest left you can get, l is our
1544        "working left" meaning our current strut edge which we're calculating
1545     */
1546
1547     /* only include monitors which the search area lines up with */
1548     if (RECT_INTERSECTS_RECT(monitor_area[screen_num_monitors], *search)) {
1549         l = RECT_RIGHT(monitor_area[screen_num_monitors]);
1550         t = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1551         r = RECT_LEFT(monitor_area[screen_num_monitors]);
1552         b = RECT_TOP(monitor_area[screen_num_monitors]);
1553         for (i = 0; i < screen_num_monitors; ++i) {
1554             /* add the monitor if applicable */
1555             if (RANGES_INTERSECT(search->x, search->width,
1556                                  monitor_area[i].x, monitor_area[i].width))
1557             {
1558                 t = MIN(t, RECT_TOP(monitor_area[i]));
1559                 b = MAX(b, RECT_BOTTOM(monitor_area[i]));
1560             }
1561             if (RANGES_INTERSECT(search->y, search->height,
1562                                  monitor_area[i].y, monitor_area[i].height))
1563             {
1564                 l = MIN(l, RECT_LEFT(monitor_area[i]));
1565                 r = MAX(r, RECT_RIGHT(monitor_area[i]));
1566             }
1567         }
1568     } else {
1569         l = RECT_LEFT(monitor_area[screen_num_monitors]);
1570         t = RECT_TOP(monitor_area[screen_num_monitors]);
1571         r = RECT_RIGHT(monitor_area[screen_num_monitors]);
1572         b = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1573     }
1574
1575     for (d = 0; d < screen_num_desktops; ++d) {
1576         if (d != desktop && desktop != DESKTOP_ALL) continue;
1577
1578         for (i = 0; i < screen_num_monitors; ++i) {
1579             if (head != SCREEN_AREA_ALL_MONITORS && head != i) continue;
1580
1581             for (it = struts_left; it; it = g_slist_next(it)) {
1582                 ObScreenStrut *s = it->data;
1583                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1584                     STRUT_LEFT_IN_SEARCH(s->strut, search) &&
1585                     !STRUT_LEFT_IGNORE(s->strut, us, search))
1586                     l = MAX(l, RECT_LEFT(monitor_area[screen_num_monitors])
1587                                + s->strut->left);
1588             }
1589             for (it = struts_top; it; it = g_slist_next(it)) {
1590                 ObScreenStrut *s = it->data;
1591                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1592                     STRUT_TOP_IN_SEARCH(s->strut, search) &&
1593                     !STRUT_TOP_IGNORE(s->strut, us, search))
1594                     t = MAX(t, RECT_TOP(monitor_area[screen_num_monitors])
1595                                + s->strut->top);
1596             }
1597             for (it = struts_right; it; it = g_slist_next(it)) {
1598                 ObScreenStrut *s = it->data;
1599                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1600                     STRUT_RIGHT_IN_SEARCH(s->strut, search) &&
1601                     !STRUT_RIGHT_IGNORE(s->strut, us, search))
1602                     r = MIN(r, RECT_RIGHT(monitor_area[screen_num_monitors])
1603                                - s->strut->right);
1604             }
1605             for (it = struts_bottom; it; it = g_slist_next(it)) {
1606                 ObScreenStrut *s = it->data;
1607                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1608                     STRUT_BOTTOM_IN_SEARCH(s->strut, search) &&
1609                     !STRUT_BOTTOM_IGNORE(s->strut, us, search))
1610                     b = MIN(b, RECT_BOTTOM(monitor_area[screen_num_monitors])
1611                                - s->strut->bottom);
1612             }
1613
1614             /* limit to this monitor */
1615             if (head == i) {
1616                 l = MAX(l, RECT_LEFT(monitor_area[i]));
1617                 t = MAX(t, RECT_TOP(monitor_area[i]));
1618                 r = MIN(r, RECT_RIGHT(monitor_area[i]));
1619                 b = MIN(b, RECT_BOTTOM(monitor_area[i]));
1620             }
1621         }
1622     }
1623
1624     a = g_slice_new(Rect);
1625     a->x = l;
1626     a->y = t;
1627     a->width = r - l + 1;
1628     a->height = b - t + 1;
1629     return a;
1630 }
1631
1632 guint screen_find_monitor(const Rect *search)
1633 {
1634     guint i;
1635     guint most = screen_num_monitors;
1636     guint mostv = 0;
1637
1638     for (i = 0; i < screen_num_monitors; ++i) {
1639         const Rect *area = screen_physical_area_monitor(i);
1640         if (RECT_INTERSECTS_RECT(*area, *search)) {
1641             Rect r;
1642             guint v;
1643
1644             RECT_SET_INTERSECTION(r, *area, *search);
1645             v = r.width * r.height;
1646
1647             if (v > mostv) {
1648                 mostv = v;
1649                 most = i;
1650             }
1651         }
1652     }
1653     return most;
1654 }
1655
1656 const Rect* screen_physical_area_all_monitors(void)
1657 {
1658     return screen_physical_area_monitor(screen_num_monitors);
1659 }
1660
1661 const Rect* screen_physical_area_monitor(guint head)
1662 {
1663     g_assert(head <= screen_num_monitors);
1664
1665     return &monitor_area[head];
1666 }
1667
1668 gboolean screen_physical_area_monitor_contains(guint head, Rect *search)
1669 {
1670     g_assert(head <= screen_num_monitors);
1671     g_assert(search);
1672     return RECT_INTERSECTS_RECT(monitor_area[head], *search);
1673 }
1674
1675 guint screen_monitor_active(void)
1676 {
1677     if (moveresize_client)
1678         return client_monitor(moveresize_client);
1679     else if (focus_client)
1680         return client_monitor(focus_client);
1681     else
1682         return screen_monitor_pointer();
1683 }
1684
1685 const Rect* screen_physical_area_active(void)
1686 {
1687     return screen_physical_area_monitor(screen_monitor_active());
1688 }
1689
1690 guint screen_monitor_primary(gboolean fixed)
1691 {
1692     if (config_primary_monitor_index > 0) {
1693         if (config_primary_monitor_index-1 < screen_num_monitors)
1694             return config_primary_monitor_index - 1;
1695         else
1696             return 0;
1697     }
1698     else if (fixed)
1699         return 0;
1700     else if (config_primary_monitor == OB_PLACE_MONITOR_ACTIVE)
1701         return screen_monitor_active();
1702     else /* config_primary_monitor == OB_PLACE_MONITOR_MOUSE */
1703         return screen_monitor_pointer();
1704 }
1705
1706 const Rect* screen_physical_area_primary(gboolean fixed)
1707 {
1708     return screen_physical_area_monitor(screen_monitor_primary(fixed));
1709 }
1710
1711 void screen_set_root_cursor(void)
1712 {
1713     if (sn_app_starting())
1714         XDefineCursor(obt_display, obt_root(ob_screen),
1715                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1716     else
1717         XDefineCursor(obt_display, obt_root(ob_screen),
1718                       ob_cursor(OB_CURSOR_POINTER));
1719 }
1720
1721 guint screen_find_monitor_point(guint x, guint y)
1722 {
1723     Rect mon;
1724     RECT_SET(mon, x, y, 1, 1);
1725     return screen_find_monitor(&mon);
1726 }
1727
1728 guint screen_monitor_pointer()
1729 {
1730     gint x, y;
1731     if (!screen_pointer_pos(&x, &y))
1732         x = y = 0;
1733     return screen_find_monitor_point(x, y);
1734 }
1735
1736 gboolean screen_pointer_pos(gint *x, gint *y)
1737 {
1738     Window w;
1739     gint i;
1740     guint u;
1741     gboolean ret;
1742
1743     ret = !!XQueryPointer(obt_display, obt_root(ob_screen),
1744                           &w, &w, x, y, &i, &i, &u);
1745     if (!ret) {
1746         for (i = 0; i < ScreenCount(obt_display); ++i)
1747             if (i != ob_screen)
1748                 if (XQueryPointer(obt_display, obt_root(i),
1749                                   &w, &w, x, y, &i, &i, &u))
1750                     break;
1751     }
1752     return ret;
1753 }