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
  42 #include <X11/Xlib.h>
  43 #ifdef HAVE_UNISTD_H
  44 #  include <sys/types.h>
  45 #  include <unistd.h>
  46 #endif
  47 #include <assert.h>
  48
  49 /*! The event mask to grab on the root window */
  50 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  51                         EnterWindowMask | LeaveWindowMask | \
  52                         SubstructureRedirectMask | FocusChangeMask | \
  53                         ButtonPressMask | ButtonReleaseMask)
  54
  55 static gboolean screen_validate_layout(ObDesktopLayout *l);
  56 static gboolean replace_wm(void);
  57 static void     screen_tell_ksplash(void);
  58 static void     screen_fallback_focus(void);
  59
  60 guint           screen_num_desktops;
  61 guint           screen_num_monitors;
  62 guint           screen_desktop;
  63 guint           screen_last_desktop;
  64 gboolean        screen_showing_desktop;
  65 ObDesktopLayout screen_desktop_layout;
  66 gchar         **screen_desktop_names;
  67 Window          screen_support_win;
  68 Time            screen_desktop_user_time = CurrentTime;
  69
  70 static Size     screen_physical_size;
  71 static guint    screen_old_desktop;
  72 static gboolean screen_desktop_timeout = TRUE;
  73 static guint    screen_desktop_timer = 0;
  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 guint         desktop_popup_timer = 0;
  84 static gboolean      desktop_popup_perm;
  85
  86 /*! The number of microseconds that you need to be on a desktop before it will
  87   replace the remembered "last desktop" */
  88 #define REMEMBER_LAST_DESKTOP_TIME 750
  89
  90 static gboolean replace_wm(void)
  91 {
  92     gchar *wm_sn;
  93     Atom wm_sn_atom;
  94     Window current_wm_sn_owner;
  95     Time timestamp;
  96
  97     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  98     wm_sn_atom = XInternAtom(obt_display, wm_sn, FALSE);
  99     g_free(wm_sn);
 100
 101     current_wm_sn_owner = XGetSelectionOwner(obt_display, wm_sn_atom);
 102     if (current_wm_sn_owner == screen_support_win)
 103         current_wm_sn_owner = None;
 104     if (current_wm_sn_owner) {
 105         if (!ob_replace_wm) {
 106             g_message(_("A window manager is already running on screen %d"),
 107                       ob_screen);
 108             return FALSE;
 109         }
 110         obt_display_ignore_errors(TRUE);
 111
 112         /* We want to find out when the current selection owner dies */
 113         XSelectInput(obt_display, current_wm_sn_owner, StructureNotifyMask);
 114         XSync(obt_display, FALSE);
 115
 116         obt_display_ignore_errors(FALSE);
 117         if (obt_display_error_occured)
 118             current_wm_sn_owner = None;
 119     }
 120
 121     timestamp = event_time();
 122
 123     XSetSelectionOwner(obt_display, wm_sn_atom, screen_support_win,
 124                        timestamp);
 125
 126     if (XGetSelectionOwner(obt_display, wm_sn_atom) != screen_support_win) {
 127         g_message(_("Could not acquire window manager selection on screen %d"),
 128                   ob_screen);
 129         return FALSE;
 130     }
 131
 132     /* Wait for old window manager to go away */
 133     if (current_wm_sn_owner) {
 134       gulong wait = 0;
 135       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 136       ObtXQueueWindowType wt;
 137
 138       wt.window = current_wm_sn_owner;
 139       wt.type = DestroyNotify;
 140
 141       while (wait < timeout) {
 142           /* Checks the local queue and incoming events for this event */
 143           if (xqueue_exists_local(xqueue_match_window_type, &wt))
 144               break;
 145           g_usleep(G_USEC_PER_SEC / 10);
 146           wait += G_USEC_PER_SEC / 10;
 147       }
 148
 149       if (wait >= timeout) {
 150           g_message(_("The WM on screen %d is not exiting"), ob_screen);
 151           return FALSE;
 152       }
 153     }
 154
 155     /* Send client message indicating that we are now the WM */
 156     obt_prop_message(ob_screen, obt_root(ob_screen), OBT_PROP_ATOM(MANAGER),
 157                      timestamp, wm_sn_atom, screen_support_win, 0, 0,
 158                      SubstructureNotifyMask);
 159
 160     return TRUE;
 161 }
 162
 163 gboolean screen_annex(void)
 164 {
 165     XSetWindowAttributes attrib;
 166     pid_t pid;
 167     gint i, num_support;
 168     gulong *supported;
 169
 170     /* create the netwm support window */
 171     attrib.override_redirect = TRUE;
 172     attrib.event_mask = PropertyChangeMask;
 173     screen_support_win = XCreateWindow(obt_display, obt_root(ob_screen),
 174                                        -100, -100, 1, 1, 0,
 175                                        CopyFromParent, InputOutput,
 176                                        CopyFromParent,
 177                                        CWEventMask | CWOverrideRedirect,
 178                                        &attrib);
 179     XMapWindow(obt_display, screen_support_win);
 180     XLowerWindow(obt_display, screen_support_win);
 181
 182     if (!replace_wm()) {
 183         XDestroyWindow(obt_display, screen_support_win);
 184         return FALSE;
 185     }
 186
 187     obt_display_ignore_errors(TRUE);
 188     XSelectInput(obt_display, obt_root(ob_screen), ROOT_EVENTMASK);
 189     obt_display_ignore_errors(FALSE);
 190     if (obt_display_error_occured) {
 191         g_message(_("A window manager is already running on screen %d"),
 192                   ob_screen);
 193
 194         XDestroyWindow(obt_display, screen_support_win);
 195         return FALSE;
 196     }
 197
 198     screen_set_root_cursor();
 199
 200     /* set the OPENBOX_PID hint */
 201     pid = getpid();
 202     OBT_PROP_SET32(obt_root(ob_screen), OPENBOX_PID, CARDINAL, pid);
 203
 204     /* set supporting window */
 205     OBT_PROP_SET32(obt_root(ob_screen),
 206                    NET_SUPPORTING_WM_CHECK, WINDOW, screen_support_win);
 207
 208     /* set properties on the supporting window */
 209     OBT_PROP_SETS(screen_support_win, NET_WM_NAME, utf8, "Openbox");
 210     OBT_PROP_SET32(screen_support_win, NET_SUPPORTING_WM_CHECK,
 211                    WINDOW, screen_support_win);
 212
 213     /* set the _NET_SUPPORTED_ATOMS hint */
 214
 215     /* this is all the atoms after NET_SUPPORTED in the ObtPropAtoms enum */
 216     num_support = OBT_PROP_NUM_ATOMS - OBT_PROP_NET_SUPPORTED - 1;
 217     i = 0;
 218     supported = g_new(gulong, num_support);
 219     supported[i++] = OBT_PROP_ATOM(NET_SUPPORTING_WM_CHECK);
 220     supported[i++] = OBT_PROP_ATOM(NET_WM_FULL_PLACEMENT);
 221     supported[i++] = OBT_PROP_ATOM(NET_CURRENT_DESKTOP);
 222     supported[i++] = OBT_PROP_ATOM(NET_NUMBER_OF_DESKTOPS);
 223     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_GEOMETRY);
 224     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_VIEWPORT);
 225     supported[i++] = OBT_PROP_ATOM(NET_ACTIVE_WINDOW);
 226     supported[i++] = OBT_PROP_ATOM(NET_WORKAREA);
 227     supported[i++] = OBT_PROP_ATOM(NET_CLIENT_LIST);
 228     supported[i++] = OBT_PROP_ATOM(NET_CLIENT_LIST_STACKING);
 229     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_NAMES);
 230     supported[i++] = OBT_PROP_ATOM(NET_CLOSE_WINDOW);
 231     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_LAYOUT);
 232     supported[i++] = OBT_PROP_ATOM(NET_SHOWING_DESKTOP);
 233     supported[i++] = OBT_PROP_ATOM(NET_WM_NAME);
 234     supported[i++] = OBT_PROP_ATOM(NET_WM_VISIBLE_NAME);
 235     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON_NAME);
 236     supported[i++] = OBT_PROP_ATOM(NET_WM_VISIBLE_ICON_NAME);
 237     supported[i++] = OBT_PROP_ATOM(NET_WM_DESKTOP);
 238     supported[i++] = OBT_PROP_ATOM(NET_WM_STRUT);
 239     supported[i++] = OBT_PROP_ATOM(NET_WM_STRUT_PARTIAL);
 240     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON);
 241     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON_GEOMETRY);
 242     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE);
 243     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DESKTOP);
 244     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DOCK);
 245     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_TOOLBAR);
 246     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_MENU);
 247     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_UTILITY);
 248     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_SPLASH);
 249     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DIALOG);
 250     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_NORMAL);
 251     supported[i++] = OBT_PROP_ATOM(NET_WM_ALLOWED_ACTIONS);
 252     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MOVE);
 253     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_RESIZE);
 254     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MINIMIZE);
 255     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_SHADE);
 256     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MAXIMIZE_HORZ);
 257     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MAXIMIZE_VERT);
 258     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_FULLSCREEN);
 259     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_CHANGE_DESKTOP);
 260     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_CLOSE);
 261     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_ABOVE);
 262     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_BELOW);
 263     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE);
 264     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MODAL);
 265     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MAXIMIZED_VERT);
 266     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MAXIMIZED_HORZ);
 267     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SHADED);
 268     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SKIP_TASKBAR);
 269     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SKIP_PAGER);
 270     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_HIDDEN);
 271     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_FULLSCREEN);
 272     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_ABOVE);
 273     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_BELOW);
 274     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_DEMANDS_ATTENTION);
 275     supported[i++] = OBT_PROP_ATOM(NET_MOVERESIZE_WINDOW);
 276     supported[i++] = OBT_PROP_ATOM(NET_WM_MOVERESIZE);
 277     supported[i++] = OBT_PROP_ATOM(NET_WM_USER_TIME);
 278 /*
 279     supported[i++] = OBT_PROP_ATOM(NET_WM_USER_TIME_WINDOW);
 280 */
 281     supported[i++] = OBT_PROP_ATOM(NET_FRAME_EXTENTS);
 282     supported[i++] = OBT_PROP_ATOM(NET_REQUEST_FRAME_EXTENTS);
 283     supported[i++] = OBT_PROP_ATOM(NET_RESTACK_WINDOW);
 284     supported[i++] = OBT_PROP_ATOM(NET_STARTUP_ID);
 285 #ifdef SYNC
 286     supported[i++] = OBT_PROP_ATOM(NET_WM_SYNC_REQUEST);
 287     supported[i++] = OBT_PROP_ATOM(NET_WM_SYNC_REQUEST_COUNTER);
 288 #endif
 289     supported[i++] = OBT_PROP_ATOM(NET_WM_PID);
 290     supported[i++] = OBT_PROP_ATOM(NET_WM_PING);
 291
 292     supported[i++] = OBT_PROP_ATOM(KDE_WM_CHANGE_STATE);
 293     supported[i++] = OBT_PROP_ATOM(KDE_NET_WM_FRAME_STRUT);
 294     supported[i++] = OBT_PROP_ATOM(KDE_NET_WM_WINDOW_TYPE_OVERRIDE);
 295
 296     supported[i++] = OBT_PROP_ATOM(OB_WM_ACTION_UNDECORATE);
 297     supported[i++] = OBT_PROP_ATOM(OB_WM_STATE_UNDECORATED);
 298     supported[i++] = OBT_PROP_ATOM(OPENBOX_PID);
 299     supported[i++] = OBT_PROP_ATOM(OB_THEME);
 300     supported[i++] = OBT_PROP_ATOM(OB_CONFIG_FILE);
 301     supported[i++] = OBT_PROP_ATOM(OB_CONTROL);
 302     supported[i++] = OBT_PROP_ATOM(OB_VERSION);
 303     supported[i++] = OBT_PROP_ATOM(OB_APP_ROLE);
 304     supported[i++] = OBT_PROP_ATOM(OB_APP_TITLE);
 305     supported[i++] = OBT_PROP_ATOM(OB_APP_NAME);
 306     supported[i++] = OBT_PROP_ATOM(OB_APP_CLASS);
 307     supported[i++] = OBT_PROP_ATOM(OB_APP_TYPE);
 308     g_assert(i == num_support);
 309
 310     OBT_PROP_SETA32(obt_root(ob_screen),
 311                     NET_SUPPORTED, ATOM, supported, num_support);
 312     g_free(supported);
 313
 314     OBT_PROP_SETS(RootWindow(obt_display, ob_screen), OB_VERSION, utf8,
 315                   OPENBOX_VERSION);
 316
 317     screen_tell_ksplash();
 318
 319     return TRUE;
 320 }
 321
 322 static void screen_tell_ksplash(void)
 323 {
 324     XEvent e;
 325     char **argv;
 326
 327     argv = g_new(gchar*, 6);
 328     argv[0] = g_strdup("dcop");
 329     argv[1] = g_strdup("ksplash");
 330     argv[2] = g_strdup("ksplash");
 331     argv[3] = g_strdup("upAndRunning(QString)");
 332     argv[4] = g_strdup("wm started");
 333     argv[5] = NULL;
 334
 335     /* tell ksplash through the dcop server command line interface */
 336     g_spawn_async(NULL, argv, NULL,
 337                   G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
 338                   G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
 339                   NULL, NULL, NULL, NULL);
 340     g_strfreev(argv);
 341
 342     /* i'm not sure why we do this, kwin does it, but ksplash doesn't seem to
 343        hear it anyways. perhaps it is for old ksplash. or new ksplash. or
 344        something. oh well. */
 345     e.xclient.type = ClientMessage;
 346     e.xclient.display = obt_display;
 347     e.xclient.window = obt_root(ob_screen);
 348     e.xclient.message_type =
 349         XInternAtom(obt_display, "_KDE_SPLASH_PROGRESS", False);
 350     e.xclient.format = 8;
 351     strcpy(e.xclient.data.b, "wm started");
 352     XSendEvent(obt_display, obt_root(ob_screen),
 353                False, SubstructureNotifyMask, &e);
 354 }
 355
 356 void screen_startup(gboolean reconfig)
 357 {
 358     gchar **names = NULL;
 359     guint32 d;
 360     gboolean namesexist = FALSE;
 361
 362     desktop_popup = pager_popup_new();
 363     desktop_popup_perm = FALSE;
 364     pager_popup_height(desktop_popup, POPUP_HEIGHT);
 365
 366     if (reconfig) {
 367         /* update the pager popup's width */
 368         pager_popup_text_width_to_strings(desktop_popup,
 369                                           screen_desktop_names,
 370                                           screen_num_desktops);
 371         return;
 372     }
 373
 374     /* get the initial size */
 375     screen_resize();
 376
 377     /* have names already been set for the desktops? */
 378     if (OBT_PROP_GETSS(obt_root(ob_screen), NET_DESKTOP_NAMES, utf8, &names)) {
 379         g_strfreev(names);
 380         namesexist = TRUE;
 381     }
 382
 383     /* if names don't exist and we have session names, set those.
 384        do this stuff BEFORE setting the number of desktops, because that
 385        will create default names for them
 386     */
 387     if (!namesexist && session_desktop_names != NULL) {
 388         guint i, numnames;
 389         GSList *it;
 390
 391         /* get the desktop names */
 392         numnames = g_slist_length(session_desktop_names);
 393         names = g_new(gchar*, numnames + 1);
 394         names[numnames] = NULL;
 395         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
 396             names[i] = g_strdup(it->data);
 397
 398         /* set the root window property */
 399         OBT_PROP_SETSS(obt_root(ob_screen),
 400                        NET_DESKTOP_NAMES, utf8, (const gchar*const*)names);
 401
 402         g_strfreev(names);
 403     }
 404
 405     /* set the number of desktops, if it's not already set.
 406
 407        this will also set the default names from the config file up for
 408        desktops that don't have names yet */
 409     screen_num_desktops = 0;
 410     if (OBT_PROP_GET32(obt_root(ob_screen),
 411                        NET_NUMBER_OF_DESKTOPS, CARDINAL, &d))
 412     {
 413         if (d != config_desktops_num) {
 414             /* TRANSLATORS: If you need to specify a different order of the
 415                arguments, you can use %1$d for the first one and %2$d for the
 416                second one. For example,
 417                "The current session has %2$d desktops, but Openbox is configured for %1$d ..." */
 418             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),
 419                       config_desktops_num, d);
 420         }
 421         screen_set_num_desktops(d);
 422     }
 423     /* restore from session if possible */
 424     else if (session_num_desktops)
 425         screen_set_num_desktops(session_num_desktops);
 426     else
 427         screen_set_num_desktops(config_desktops_num);
 428
 429     screen_desktop = screen_num_desktops;  /* something invalid */
 430     /* start on the current desktop when a wm was already running */
 431     if (OBT_PROP_GET32(obt_root(ob_screen),
 432                        NET_CURRENT_DESKTOP, CARDINAL, &d) &&
 433         d < screen_num_desktops)
 434     {
 435         screen_set_desktop(d, FALSE);
 436     } else if (session_desktop >= 0)
 437         screen_set_desktop(MIN((guint)session_desktop,
 438                                screen_num_desktops), FALSE);
 439     else
 440         screen_set_desktop(MIN(config_screen_firstdesk,
 441                                screen_num_desktops) - 1, FALSE);
 442     screen_last_desktop = screen_desktop;
 443
 444     /* don't start in showing-desktop mode */
 445     screen_showing_desktop = FALSE;
 446     OBT_PROP_SET32(obt_root(ob_screen),
 447                    NET_SHOWING_DESKTOP, CARDINAL, screen_showing_desktop);
 448
 449     if (session_desktop_layout_present &&
 450         screen_validate_layout(&session_desktop_layout))
 451     {
 452         screen_desktop_layout = session_desktop_layout;
 453     }
 454     else
 455         screen_update_layout();
 456 }
 457
 458 void screen_shutdown(gboolean reconfig)
 459 {
 460     pager_popup_free(desktop_popup);
 461
 462     if (reconfig)
 463         return;
 464
 465     XSelectInput(obt_display, obt_root(ob_screen), NoEventMask);
 466
 467     /* we're not running here no more! */
 468     OBT_PROP_ERASE(obt_root(ob_screen), OPENBOX_PID);
 469     /* not without us */
 470     OBT_PROP_ERASE(obt_root(ob_screen), NET_SUPPORTED);
 471     /* don't keep this mode */
 472     OBT_PROP_ERASE(obt_root(ob_screen), NET_SHOWING_DESKTOP);
 473
 474     XDestroyWindow(obt_display, screen_support_win);
 475
 476     g_strfreev(screen_desktop_names);
 477     screen_desktop_names = NULL;
 478 }
 479
 480 void screen_resize(void)
 481 {
 482     static gint oldw = 0, oldh = 0;
 483     gint w, h;
 484     GList *it;
 485     gulong geometry[2];
 486
 487     w = WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen));
 488     h = HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen));
 489
 490     if (w == oldw && h == oldh) return;
 491
 492     oldw = w; oldh = h;
 493
 494     /* Set the _NET_DESKTOP_GEOMETRY hint */
 495     screen_physical_size.width = geometry[0] = w;
 496     screen_physical_size.height = geometry[1] = h;
 497     OBT_PROP_SETA32(obt_root(ob_screen),
 498                     NET_DESKTOP_GEOMETRY, CARDINAL, geometry, 2);
 499
 500     if (ob_state() != OB_STATE_RUNNING)
 501         return;
 502
 503     screen_update_areas();
 504     dock_configure();
 505
 506     for (it = client_list; it; it = g_list_next(it))
 507         client_move_onscreen(it->data, FALSE);
 508 }
 509
 510 void screen_set_num_desktops(guint num)
 511 {
 512     gulong *viewport;
 513     GList *it, *stacking_copy;
 514
 515     g_assert(num > 0);
 516
 517     if (screen_num_desktops == num) return;
 518
 519     screen_num_desktops = num;
 520     OBT_PROP_SET32(obt_root(ob_screen), NET_NUMBER_OF_DESKTOPS, CARDINAL, num);
 521
 522     /* set the viewport hint */
 523     viewport = g_new0(gulong, num * 2);
 524     OBT_PROP_SETA32(obt_root(ob_screen),
 525                     NET_DESKTOP_VIEWPORT, CARDINAL, viewport, num * 2);
 526     g_free(viewport);
 527
 528     /* the number of rows/columns will differ */
 529     screen_update_layout();
 530
 531     /* move windows on desktops that will no longer exist!
 532        make a copy of the list cuz we're changing it */
 533     stacking_copy = g_list_copy(stacking_list);
 534     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 535         if (WINDOW_IS_CLIENT(it->data)) {
 536             ObClient *c = it->data;
 537             if (c->desktop != DESKTOP_ALL && c->desktop >= num)
 538                 client_set_desktop(c, num - 1, FALSE, TRUE);
 539             /* raise all the windows that are on the current desktop which
 540                is being merged */
 541             else if (screen_desktop == num - 1 &&
 542                      (c->desktop == DESKTOP_ALL ||
 543                       c->desktop == screen_desktop))
 544                 stacking_raise(CLIENT_AS_WINDOW(c));
 545         }
 546     }
 547     g_list_free(stacking_copy);
 548
 549     /* change our struts/area to match (after moving windows) */
 550     screen_update_areas();
 551
 552     /* may be some unnamed desktops that we need to fill in with names
 553        (after updating the areas so the popup can resize) */
 554     screen_update_desktop_names();
 555
 556     /* change our desktop if we're on one that no longer exists! */
 557     if (screen_desktop >= screen_num_desktops)
 558         screen_set_desktop(num - 1, TRUE);
 559 }
 560
 561 static void screen_fallback_focus(void)
 562 {
 563     ObClient *c;
 564     gboolean allow_omni;
 565
 566     /* only allow omnipresent windows to get focus on desktop change if
 567        an omnipresent window is already focused (it'll keep focus probably, but
 568        maybe not depending on mouse-focus options) */
 569     allow_omni = focus_client && (client_normal(focus_client) &&
 570                                   focus_client->desktop == DESKTOP_ALL);
 571
 572     /* the client moved there already so don't move focus. prevent flicker
 573        on sendtodesktop + follow */
 574     if (focus_client && focus_client->desktop == screen_desktop)
 575         return;
 576
 577     /* have to try focus here because when you leave an empty desktop
 578        there is no focus out to watch for. also, we have different rules
 579        here. we always allow it to look under the mouse pointer if
 580        config_focus_last is FALSE
 581
 582        do this before hiding the windows so if helper windows are coming
 583        with us, they don't get hidden
 584     */
 585     if ((c = focus_fallback(TRUE, !config_focus_last, allow_omni,
 586                             !allow_omni)))
 587     {
 588         /* only do the flicker reducing stuff ahead of time if we are going
 589            to call xsetinputfocus on the window ourselves. otherwise there is
 590            no guarantee the window will actually take focus.. */
 591         if (c->can_focus) {
 592             /* reduce flicker by hiliting now rather than waiting for the
 593                server FocusIn event */
 594             frame_adjust_focus(c->frame, TRUE);
 595             /* do this here so that if you switch desktops to a window with
 596                helper windows then the helper windows won't flash */
 597             client_bring_helper_windows(c);
 598         }
 599     }
 600 }
 601
 602 static gboolean last_desktop_func(gpointer data)
 603 {
 604     screen_desktop_timeout = TRUE;
 605     screen_desktop_timer = 0;
 606     return FALSE; /* don't repeat */
 607 }
 608
 609 void screen_set_desktop(guint num, gboolean dofocus)
 610 {
 611     GList *it;
 612     guint previous;
 613     gulong ignore_start;
 614
 615     g_assert(num < screen_num_desktops);
 616
 617     previous = screen_desktop;
 618     screen_desktop = num;
 619
 620     if (previous == num) return;
 621
 622     OBT_PROP_SET32(obt_root(ob_screen), NET_CURRENT_DESKTOP, CARDINAL, num);
 623
 624     /* This whole thing decides when/how to save the screen_last_desktop so
 625        that it can be restored later if you want */
 626     if (screen_desktop_timeout) {
 627         /* If screen_desktop_timeout is true, then we've been on this desktop
 628            long enough and we can save it as the last desktop. */
 629
 630         if (screen_last_desktop == previous)
 631             /* this is the startup state only */
 632             screen_old_desktop = screen_desktop;
 633         else {
 634             /* save the "last desktop" as the "old desktop" */
 635             screen_old_desktop = screen_last_desktop;
 636             /* save the desktop we're coming from as the "last desktop" */
 637             screen_last_desktop = previous;
 638         }
 639     }
 640     else {
 641         /* If screen_desktop_timeout is false, then we just got to this desktop
 642            and we are moving away again. */
 643
 644         if (screen_desktop == screen_last_desktop) {
 645             /* If we are moving to the "last desktop" .. */
 646             if (previous == screen_old_desktop) {
 647                 /* .. from the "old desktop", change the last desktop to
 648                    be where we are coming from */
 649                 screen_last_desktop = screen_old_desktop;
 650             }
 651             else if (screen_last_desktop == screen_old_desktop) {
 652                 /* .. and also to the "old desktop", change the "last
 653                    desktop" to be where we are coming from */
 654                 screen_last_desktop = previous;
 655             }
 656             else {
 657                 /* .. from some other desktop, then set the "last desktop" to
 658                    be the saved "old desktop", i.e. where we were before the
 659                    "last desktop" */
 660                 screen_last_desktop = screen_old_desktop;
 661             }
 662         }
 663         else {
 664             /* If we are moving to any desktop besides the "last desktop"..
 665                (this is the normal case) */
 666             if (screen_desktop == screen_old_desktop) {
 667                 /* If moving to the "old desktop", which is not the
 668                    "last desktop", don't save anything */
 669             }
 670             else if (previous == screen_old_desktop) {
 671                 /* If moving from the "old desktop", and not to the
 672                    "last desktop", don't save anything */
 673             }
 674             else if (screen_last_desktop == screen_old_desktop) {
 675                 /* If the "last desktop" is the same as "old desktop" and
 676                    you're not moving to the "last desktop" then save where
 677                    we're coming from as the "last desktop" */
 678                 screen_last_desktop = previous;
 679             }
 680             else {
 681                 /* If the "last desktop" is different from the "old desktop"
 682                    and you're not moving to the "last desktop", then don't save
 683                    anything */
 684             }
 685         }
 686     }
 687     screen_desktop_timeout = FALSE;
 688     if (screen_desktop_timer) g_source_remove(screen_desktop_timer);
 689     screen_desktop_timer = g_timeout_add(REMEMBER_LAST_DESKTOP_TIME,
 690                                          last_desktop_func, NULL);
 691
 692     ob_debug("Moving to desktop %d", num+1);
 693
 694     if (ob_state() == OB_STATE_RUNNING)
 695         screen_show_desktop_popup(screen_desktop, FALSE);
 696
 697     /* ignore enter events caused by the move */
 698     ignore_start = event_start_ignore_all_enters();
 699
 700     if (moveresize_client)
 701         client_set_desktop(moveresize_client, num, TRUE, FALSE);
 702
 703     /* show windows before hiding the rest to lessen the enter/leave events */
 704
 705     /* show windows from top to bottom */
 706     for (it = stacking_list; it; it = g_list_next(it)) {
 707         if (WINDOW_IS_CLIENT(it->data)) {
 708             ObClient *c = it->data;
 709             client_show(c);
 710         }
 711     }
 712
 713     if (dofocus) screen_fallback_focus();
 714
 715     /* hide windows from bottom to top */
 716     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 717         if (WINDOW_IS_CLIENT(it->data)) {
 718             ObClient *c = it->data;
 719             if (client_hide(c)) {
 720                 if (c == focus_client) {
 721                     /* c was focused and we didn't do fallback clearly so make
 722                        sure openbox doesnt still consider the window focused.
 723                        this happens when using NextWindow with allDesktops,
 724                        since it doesnt want to move focus on desktop change,
 725                        but the focus is not going to stay with the current
 726                        window, which has now disappeared.
 727                        only do this if the client was actually hidden,
 728                        otherwise it can keep focus. */
 729                     focus_set_client(NULL);
 730                 }
 731             }
 732         }
 733     }
 734
 735     focus_cycle_addremove(NULL, TRUE);
 736
 737     event_end_ignore_all_enters(ignore_start);
 738
 739     if (event_source_time() != CurrentTime)
 740         screen_desktop_user_time = event_source_time();
 741 }
 742
 743 void screen_add_desktop(gboolean current)
 744 {
 745     gulong ignore_start;
 746
 747     /* ignore enter events caused by this */
 748     ignore_start = event_start_ignore_all_enters();
 749
 750     screen_set_num_desktops(screen_num_desktops+1);
 751
 752     /* move all the clients over */
 753     if (current) {
 754         GList *it;
 755
 756         for (it = client_list; it; it = g_list_next(it)) {
 757             ObClient *c = it->data;
 758             if (c->desktop != DESKTOP_ALL && c->desktop >= screen_desktop &&
 759                 /* don't move direct children, they'll be moved with their
 760                    parent - which will have to be on the same desktop */
 761                 !client_direct_parent(c))
 762             {
 763                 ob_debug("moving window %s", c->title);
 764                 client_set_desktop(c, c->desktop+1, FALSE, TRUE);
 765             }
 766         }
 767     }
 768
 769     event_end_ignore_all_enters(ignore_start);
 770 }
 771
 772 void screen_remove_desktop(gboolean current)
 773 {
 774     guint rmdesktop, movedesktop;
 775     GList *it, *stacking_copy;
 776     gulong ignore_start;
 777
 778     if (screen_num_desktops <= 1) return;
 779
 780     /* ignore enter events caused by this */
 781     ignore_start = event_start_ignore_all_enters();
 782
 783     /* what desktop are we removing and moving to? */
 784     if (current)
 785         rmdesktop = screen_desktop;
 786     else
 787         rmdesktop = screen_num_desktops - 1;
 788     if (rmdesktop < screen_num_desktops - 1)
 789         movedesktop = rmdesktop + 1;
 790     else
 791         movedesktop = rmdesktop;
 792
 793     /* make a copy of the list cuz we're changing it */
 794     stacking_copy = g_list_copy(stacking_list);
 795     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 796         if (WINDOW_IS_CLIENT(it->data)) {
 797             ObClient *c = it->data;
 798             guint d = c->desktop;
 799             if (d != DESKTOP_ALL && d >= movedesktop &&
 800                 /* don't move direct children, they'll be moved with their
 801                    parent - which will have to be on the same desktop */
 802                 !client_direct_parent(c))
 803             {
 804                 ob_debug("moving window %s", c->title);
 805                 client_set_desktop(c, c->desktop - 1, TRUE, TRUE);
 806             }
 807             /* raise all the windows that are on the current desktop which
 808                is being merged */
 809             if ((screen_desktop == rmdesktop - 1 ||
 810                  screen_desktop == rmdesktop) &&
 811                 (d == DESKTOP_ALL || d == screen_desktop))
 812             {
 813                 stacking_raise(CLIENT_AS_WINDOW(c));
 814                 ob_debug("raising window %s", c->title);
 815             }
 816         }
 817     }
 818     g_list_free(stacking_copy);
 819
 820     /* fallback focus like we're changing desktops */
 821     if (screen_desktop < screen_num_desktops - 1) {
 822         screen_fallback_focus();
 823         ob_debug("fake desktop change");
 824     }
 825
 826     screen_set_num_desktops(screen_num_desktops-1);
 827
 828     event_end_ignore_all_enters(ignore_start);
 829 }
 830
 831 static void get_row_col(guint d, guint *r, guint *c)
 832 {
 833     switch (screen_desktop_layout.orientation) {
 834     case OB_ORIENTATION_HORZ:
 835         switch (screen_desktop_layout.start_corner) {
 836         case OB_CORNER_TOPLEFT:
 837             *r = d / screen_desktop_layout.columns;
 838             *c = d % screen_desktop_layout.columns;
 839             break;
 840         case OB_CORNER_BOTTOMLEFT:
 841             *r = screen_desktop_layout.rows - 1 -
 842                 d / screen_desktop_layout.columns;
 843             *c = d % screen_desktop_layout.columns;
 844             break;
 845         case OB_CORNER_TOPRIGHT:
 846             *r = d / screen_desktop_layout.columns;
 847             *c = screen_desktop_layout.columns - 1 -
 848                 d % screen_desktop_layout.columns;
 849             break;
 850         case OB_CORNER_BOTTOMRIGHT:
 851             *r = screen_desktop_layout.rows - 1 -
 852                 d / screen_desktop_layout.columns;
 853             *c = screen_desktop_layout.columns - 1 -
 854                 d % screen_desktop_layout.columns;
 855             break;
 856         }
 857         break;
 858     case OB_ORIENTATION_VERT:
 859         switch (screen_desktop_layout.start_corner) {
 860         case OB_CORNER_TOPLEFT:
 861             *r = d % screen_desktop_layout.rows;
 862             *c = d / screen_desktop_layout.rows;
 863             break;
 864         case OB_CORNER_BOTTOMLEFT:
 865             *r = screen_desktop_layout.rows - 1 -
 866                 d % screen_desktop_layout.rows;
 867             *c = d / screen_desktop_layout.rows;
 868             break;
 869         case OB_CORNER_TOPRIGHT:
 870             *r = d % screen_desktop_layout.rows;
 871             *c = screen_desktop_layout.columns - 1 -
 872                 d / screen_desktop_layout.rows;
 873             break;
 874         case OB_CORNER_BOTTOMRIGHT:
 875             *r = screen_desktop_layout.rows - 1 -
 876                 d % screen_desktop_layout.rows;
 877             *c = screen_desktop_layout.columns - 1 -
 878                 d / screen_desktop_layout.rows;
 879             break;
 880         }
 881         break;
 882     }
 883 }
 884
 885 static guint translate_row_col(guint r, guint c)
 886 {
 887     switch (screen_desktop_layout.orientation) {
 888     case OB_ORIENTATION_HORZ:
 889         switch (screen_desktop_layout.start_corner) {
 890         case OB_CORNER_TOPLEFT:
 891             return r % screen_desktop_layout.rows *
 892                 screen_desktop_layout.columns +
 893                 c % screen_desktop_layout.columns;
 894         case OB_CORNER_BOTTOMLEFT:
 895             return (screen_desktop_layout.rows - 1 -
 896                     r % screen_desktop_layout.rows) *
 897                 screen_desktop_layout.columns +
 898                 c % screen_desktop_layout.columns;
 899         case OB_CORNER_TOPRIGHT:
 900             return r % screen_desktop_layout.rows *
 901                 screen_desktop_layout.columns +
 902                 (screen_desktop_layout.columns - 1 -
 903                  c % screen_desktop_layout.columns);
 904         case OB_CORNER_BOTTOMRIGHT:
 905             return (screen_desktop_layout.rows - 1 -
 906                     r % screen_desktop_layout.rows) *
 907                 screen_desktop_layout.columns +
 908                 (screen_desktop_layout.columns - 1 -
 909                  c % screen_desktop_layout.columns);
 910         }
 911     case OB_ORIENTATION_VERT:
 912         switch (screen_desktop_layout.start_corner) {
 913         case OB_CORNER_TOPLEFT:
 914             return c % screen_desktop_layout.columns *
 915                 screen_desktop_layout.rows +
 916                 r % screen_desktop_layout.rows;
 917         case OB_CORNER_BOTTOMLEFT:
 918             return c % screen_desktop_layout.columns *
 919                 screen_desktop_layout.rows +
 920                 (screen_desktop_layout.rows - 1 -
 921                  r % screen_desktop_layout.rows);
 922         case OB_CORNER_TOPRIGHT:
 923             return (screen_desktop_layout.columns - 1 -
 924                     c % screen_desktop_layout.columns) *
 925                 screen_desktop_layout.rows +
 926                 r % screen_desktop_layout.rows;
 927         case OB_CORNER_BOTTOMRIGHT:
 928             return (screen_desktop_layout.columns - 1 -
 929                     c % screen_desktop_layout.columns) *
 930                 screen_desktop_layout.rows +
 931                 (screen_desktop_layout.rows - 1 -
 932                  r % screen_desktop_layout.rows);
 933         }
 934     }
 935     g_assert_not_reached();
 936     return 0;
 937 }
 938
 939 static gboolean hide_desktop_popup_func(gpointer data)
 940 {
 941     pager_popup_hide(desktop_popup);
 942     desktop_popup_timer = 0;
 943     XFlush(obt_display);
 944     return FALSE; /* don't repeat */
 945 }
 946
 947 void screen_show_desktop_popup(guint d, gboolean perm)
 948 {
 949     const Rect *a;
 950
 951     /* 0 means don't show the popup */
 952     if (!config_desktop_popup_time) return;
 953
 954     a = screen_physical_area_primary(FALSE);
 955     pager_popup_position(desktop_popup, CenterGravity,
 956                          a->x + a->width / 2, a->y + a->height / 2);
 957     pager_popup_icon_size_multiplier(desktop_popup,
 958                                      (screen_desktop_layout.columns /
 959                                       screen_desktop_layout.rows) / 2,
 960                                      (screen_desktop_layout.rows/
 961                                       screen_desktop_layout.columns) / 2);
 962     pager_popup_max_width(desktop_popup,
 963                           MAX(a->width/3, POPUP_WIDTH));
 964     pager_popup_show(desktop_popup, screen_desktop_names[d], d);
 965
 966     if (desktop_popup_timer) g_source_remove(desktop_popup_timer);
 967     desktop_popup_timer = 0;
 968     if (!perm && !desktop_popup_perm)
 969         /* only hide if its not already being show permanently */
 970         desktop_popup_timer = g_timeout_add(config_desktop_popup_time,
 971                                             hide_desktop_popup_func,
 972                                             desktop_popup);
 973     if (perm)
 974         desktop_popup_perm = TRUE;
 975 }
 976
 977 void screen_hide_desktop_popup(void)
 978 {
 979     if (desktop_popup_timer) g_source_remove(desktop_popup_timer);
 980     desktop_popup_timer = 0;
 981     pager_popup_hide(desktop_popup);
 982     desktop_popup_perm = FALSE;
 983 }
 984
 985 guint screen_find_desktop(guint from, ObDirection dir,
 986                           gboolean wrap, gboolean linear)
 987 {
 988     guint r, c;
 989     guint d;
 990
 991     d = from;
 992     get_row_col(d, &r, &c);
 993     if (linear) {
 994         switch (dir) {
 995         case OB_DIRECTION_EAST:
 996             if (d < screen_num_desktops - 1)
 997                 ++d;
 998             else if (wrap)
 999                 d = 0;
1000             else
1001                 return from;
1002             break;
1003         case OB_DIRECTION_WEST:
1004             if (d > 0)
1005                 --d;
1006             else if (wrap)
1007                 d = screen_num_desktops - 1;
1008             else
1009                 return from;
1010             break;
1011         default:
1012             g_assert_not_reached();
1013             return from;
1014         }
1015     } else {
1016         switch (dir) {
1017         case OB_DIRECTION_EAST:
1018             ++c;
1019             if (c >= screen_desktop_layout.columns) {
1020                 if (wrap)
1021                     c = 0;
1022                 else
1023                     return from;
1024             }
1025             d = translate_row_col(r, c);
1026             if (d >= screen_num_desktops) {
1027                 if (wrap)
1028                     ++c;
1029                 else
1030                     return from;
1031             }
1032             break;
1033         case OB_DIRECTION_WEST:
1034             --c;
1035             if (c >= screen_desktop_layout.columns) {
1036                 if (wrap)
1037                     c = screen_desktop_layout.columns - 1;
1038                 else
1039                     return from;
1040             }
1041             d = translate_row_col(r, c);
1042             if (d >= screen_num_desktops) {
1043                 if (wrap)
1044                     --c;
1045                 else
1046                     return from;
1047             }
1048             break;
1049         case OB_DIRECTION_SOUTH:
1050             ++r;
1051             if (r >= screen_desktop_layout.rows) {
1052                 if (wrap)
1053                     r = 0;
1054                 else
1055                     return from;
1056             }
1057             d = translate_row_col(r, c);
1058             if (d >= screen_num_desktops) {
1059                 if (wrap)
1060                     ++r;
1061                 else
1062                     return from;
1063             }
1064             break;
1065         case OB_DIRECTION_NORTH:
1066             --r;
1067             if (r >= screen_desktop_layout.rows) {
1068                 if (wrap)
1069                     r = screen_desktop_layout.rows - 1;
1070                 else
1071                     return from;
1072             }
1073             d = translate_row_col(r, c);
1074             if (d >= screen_num_desktops) {
1075                 if (wrap)
1076                     --r;
1077                 else
1078                     return from;
1079             }
1080             break;
1081         default:
1082             g_assert_not_reached();
1083             return from;
1084         }
1085
1086         d = translate_row_col(r, c);
1087     }
1088     return d;
1089 }
1090
1091 static gboolean screen_validate_layout(ObDesktopLayout *l)
1092 {
1093     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
1094         return FALSE;
1095
1096     /* fill in a zero rows/columns */
1097     if (l->columns == 0) {
1098         l->columns = screen_num_desktops / l->rows;
1099         if (l->rows * l->columns < screen_num_desktops)
1100             l->columns++;
1101         if (l->rows * l->columns >= screen_num_desktops + l->columns)
1102             l->rows--;
1103     } else if (l->rows == 0) {
1104         l->rows = screen_num_desktops / l->columns;
1105         if (l->columns * l->rows < screen_num_desktops)
1106             l->rows++;
1107         if (l->columns * l->rows >= screen_num_desktops + l->rows)
1108             l->columns--;
1109     }
1110
1111     /* bounds checking */
1112     if (l->orientation == OB_ORIENTATION_HORZ) {
1113         l->columns = MIN(screen_num_desktops, l->columns);
1114         l->rows = MIN(l->rows,
1115                       (screen_num_desktops + l->columns - 1) / l->columns);
1116         l->columns = screen_num_desktops / l->rows +
1117             !!(screen_num_desktops % l->rows);
1118     } else {
1119         l->rows = MIN(screen_num_desktops, l->rows);
1120         l->columns = MIN(l->columns,
1121                          (screen_num_desktops + l->rows - 1) / l->rows);
1122         l->rows = screen_num_desktops / l->columns +
1123             !!(screen_num_desktops % l->columns);
1124     }
1125     return TRUE;
1126 }
1127
1128 void screen_update_layout(void)
1129
1130 {
1131     ObDesktopLayout l;
1132     guint32 *data;
1133     guint num;
1134
1135     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
1136     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
1137     screen_desktop_layout.rows = 1;
1138     screen_desktop_layout.columns = screen_num_desktops;
1139
1140     if (OBT_PROP_GETA32(obt_root(ob_screen),
1141                         NET_DESKTOP_LAYOUT, CARDINAL, &data, &num)) {
1142         if (num == 3 || num == 4) {
1143
1144             if (data[0] == OBT_PROP_ATOM(NET_WM_ORIENTATION_VERT))
1145                 l.orientation = OB_ORIENTATION_VERT;
1146             else if (data[0] == OBT_PROP_ATOM(NET_WM_ORIENTATION_HORZ))
1147                 l.orientation = OB_ORIENTATION_HORZ;
1148             else
1149                 return;
1150
1151             if (num < 4)
1152                 l.start_corner = OB_CORNER_TOPLEFT;
1153             else {
1154                 if (data[3] == OBT_PROP_ATOM(NET_WM_TOPLEFT))
1155                     l.start_corner = OB_CORNER_TOPLEFT;
1156                 else if (data[3] == OBT_PROP_ATOM(NET_WM_TOPRIGHT))
1157                     l.start_corner = OB_CORNER_TOPRIGHT;
1158                 else if (data[3] == OBT_PROP_ATOM(NET_WM_BOTTOMRIGHT))
1159                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
1160                 else if (data[3] == OBT_PROP_ATOM(NET_WM_BOTTOMLEFT))
1161                     l.start_corner = OB_CORNER_BOTTOMLEFT;
1162                 else
1163                     return;
1164             }
1165
1166             l.columns = data[1];
1167             l.rows = data[2];
1168
1169             if (screen_validate_layout(&l))
1170                 screen_desktop_layout = l;
1171
1172             g_free(data);
1173         }
1174     }
1175 }
1176
1177 void screen_update_desktop_names(void)
1178 {
1179     guint i;
1180
1181     /* empty the array */
1182     g_strfreev(screen_desktop_names);
1183     screen_desktop_names = NULL;
1184
1185     if (OBT_PROP_GETSS(obt_root(ob_screen),
1186                        NET_DESKTOP_NAMES, utf8, &screen_desktop_names))
1187         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
1188     else
1189         i = 0;
1190     if (i < screen_num_desktops) {
1191         GSList *it;
1192
1193         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
1194                                        screen_num_desktops + 1);
1195         screen_desktop_names[screen_num_desktops] = NULL;
1196
1197         it = g_slist_nth(config_desktops_names, i);
1198
1199         for (; i < screen_num_desktops; ++i) {
1200             if (it && ((char*)it->data)[0]) /* not empty */
1201                 /* use the names from the config file when possible */
1202                 screen_desktop_names[i] = g_strdup(it->data);
1203             else
1204                 /* make up a nice name if it's not though */
1205                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
1206                                                           i + 1);
1207             if (it) it = g_slist_next(it);
1208         }
1209
1210         /* if we changed any names, then set the root property so we can
1211            all agree on the names */
1212         OBT_PROP_SETSS(obt_root(ob_screen), NET_DESKTOP_NAMES,
1213                        utf8, (const gchar*const*)screen_desktop_names);
1214     }
1215
1216     /* resize the pager for these names */
1217     pager_popup_text_width_to_strings(desktop_popup,
1218                                       screen_desktop_names,
1219                                       screen_num_desktops);
1220 }
1221
1222 void screen_show_desktop(gboolean show, ObClient *show_only)
1223 {
1224     GList *it;
1225
1226     if (show == screen_showing_desktop) return; /* no change */
1227
1228     screen_showing_desktop = show;
1229
1230     if (show) {
1231         /* hide windows bottom to top */
1232         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1233             if (WINDOW_IS_CLIENT(it->data)) {
1234                 ObClient *client = it->data;
1235                 client_showhide(client);
1236             }
1237         }
1238     }
1239     else {
1240         /* restore windows top to bottom */
1241         for (it = stacking_list; it; it = g_list_next(it)) {
1242             if (WINDOW_IS_CLIENT(it->data)) {
1243                 ObClient *client = it->data;
1244                 if (client_should_show(client)) {
1245                     if (!show_only || client == show_only)
1246                         client_show(client);
1247                     else
1248                         client_iconify(client, TRUE, FALSE, TRUE);
1249                 }
1250             }
1251         }
1252     }
1253
1254     if (show) {
1255         /* focus the desktop */
1256         for (it = focus_order; it; it = g_list_next(it)) {
1257             ObClient *c = it->data;
1258             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1259                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1260                 client_focus(it->data))
1261                 break;
1262         }
1263     }
1264     else if (!show_only) {
1265         ObClient *c;
1266
1267         if ((c = focus_fallback(TRUE, FALSE, TRUE, FALSE))) {
1268             /* only do the flicker reducing stuff ahead of time if we are going
1269                to call xsetinputfocus on the window ourselves. otherwise there
1270                is no guarantee the window will actually take focus.. */
1271             if (c->can_focus) {
1272                 /* reduce flicker by hiliting now rather than waiting for the
1273                    server FocusIn event */
1274                 frame_adjust_focus(c->frame, TRUE);
1275             }
1276         }
1277     }
1278
1279     show = !!show; /* make it boolean */
1280     OBT_PROP_SET32(obt_root(ob_screen), NET_SHOWING_DESKTOP, CARDINAL, show);
1281 }
1282
1283 void screen_install_colormap(ObClient *client, gboolean install)
1284 {
1285     if (client == NULL || client->colormap == None) {
1286         if (install)
1287             XInstallColormap(obt_display, RrColormap(ob_rr_inst));
1288         else
1289             XUninstallColormap(obt_display, RrColormap(ob_rr_inst));
1290     } else {
1291         obt_display_ignore_errors(TRUE);
1292         if (install)
1293             XInstallColormap(obt_display, client->colormap);
1294         else
1295             XUninstallColormap(obt_display, client->colormap);
1296         obt_display_ignore_errors(FALSE);
1297     }
1298 }
1299
1300 typedef struct {
1301     guint desktop;
1302     StrutPartial *strut;
1303 } ObScreenStrut;
1304
1305 #define RESET_STRUT_LIST(sl) \
1306     while (sl) { \
1307         g_slice_free(ObScreenStrut, (sl)->data); \
1308         sl = g_slist_delete_link(sl, sl); \
1309     }
1310
1311 #define ADD_STRUT_TO_LIST(sl, d, s) \
1312 { \
1313     ObScreenStrut *ss = g_slice_new(ObScreenStrut); \
1314     ss->desktop = d; \
1315     ss->strut = s;  \
1316     sl = g_slist_prepend(sl, ss); \
1317 }
1318
1319 #define VALIDATE_STRUTS(sl, side, max) \
1320 { \
1321     GSList *it; \
1322     for (it = sl; it; it = g_slist_next(it)) { \
1323       ObScreenStrut *ss = it->data; \
1324       ss->strut->side = MIN(max, ss->strut->side); \
1325     } \
1326 }
1327
1328 static void get_xinerama_screens(Rect **xin_areas, guint *nxin)
1329 {
1330     guint i;
1331     gint n, l, r, t, b;
1332 #ifdef XINERAMA
1333     XineramaScreenInfo *info;
1334 #endif
1335
1336     if (ob_debug_xinerama) {
1337         gint w = WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen));
1338         gint h = HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen));
1339         *nxin = 2;
1340         *xin_areas = g_new(Rect, *nxin + 1);
1341         RECT_SET((*xin_areas)[0], 0, 0, w/2, h);
1342         RECT_SET((*xin_areas)[1], w/2, 0, w-(w/2), h);
1343     }
1344 #ifdef XINERAMA
1345     else if (obt_display_extension_xinerama &&
1346              (info = XineramaQueryScreens(obt_display, &n))) {
1347         *nxin = n;
1348         *xin_areas = g_new(Rect, *nxin + 1);
1349         for (i = 0; i < *nxin; ++i)
1350             RECT_SET((*xin_areas)[i], info[i].x_org, info[i].y_org,
1351                      info[i].width, info[i].height);
1352         XFree(info);
1353     }
1354 #endif
1355     else {
1356         *nxin = 1;
1357         *xin_areas = g_new(Rect, *nxin + 1);
1358         RECT_SET((*xin_areas)[0], 0, 0,
1359                  WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen)),
1360                  HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen)));
1361     }
1362
1363     /* returns one extra with the total area in it */
1364     l = (*xin_areas)[0].x;
1365     t = (*xin_areas)[0].y;
1366     r = (*xin_areas)[0].x + (*xin_areas)[0].width - 1;
1367     b = (*xin_areas)[0].y + (*xin_areas)[0].height - 1;
1368     for (i = 1; i < *nxin; ++i) {
1369         l = MIN(l, (*xin_areas)[i].x);
1370         t = MIN(l, (*xin_areas)[i].y);
1371         r = MAX(r, (*xin_areas)[i].x + (*xin_areas)[i].width - 1);
1372         b = MAX(b, (*xin_areas)[i].y + (*xin_areas)[i].height - 1);
1373     }
1374     RECT_SET((*xin_areas)[*nxin], l, t, r - l + 1, b - t + 1);
1375 }
1376
1377 void screen_update_areas(void)
1378 {
1379     guint i;
1380     gulong *dims;
1381     GList *it, *onscreen;
1382
1383     /* collect the clients that are on screen */
1384     onscreen = NULL;
1385     for (it = client_list; it; it = g_list_next(it)) {
1386         if (client_monitor(it->data) != screen_num_monitors)
1387             onscreen = g_list_prepend(onscreen, it->data);
1388     }
1389
1390     g_free(monitor_area);
1391     get_xinerama_screens(&monitor_area, &screen_num_monitors);
1392
1393     /* set up the user-specified margins */
1394     config_margins.top_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1395     config_margins.top_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1396     config_margins.bottom_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1397     config_margins.bottom_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1398     config_margins.left_start = RECT_TOP(monitor_area[screen_num_monitors]);
1399     config_margins.left_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1400     config_margins.right_start = RECT_TOP(monitor_area[screen_num_monitors]);
1401     config_margins.right_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1402
1403     RESET_STRUT_LIST(struts_left);
1404     RESET_STRUT_LIST(struts_top);
1405     RESET_STRUT_LIST(struts_right);
1406     RESET_STRUT_LIST(struts_bottom);
1407
1408     /* collect the struts */
1409     for (it = client_list; it; it = g_list_next(it)) {
1410         ObClient *c = it->data;
1411         if (c->strut.left)
1412             ADD_STRUT_TO_LIST(struts_left, c->desktop, &c->strut);
1413         if (c->strut.top)
1414             ADD_STRUT_TO_LIST(struts_top, c->desktop, &c->strut);
1415         if (c->strut.right)
1416             ADD_STRUT_TO_LIST(struts_right, c->desktop, &c->strut);
1417         if (c->strut.bottom)
1418             ADD_STRUT_TO_LIST(struts_bottom, c->desktop, &c->strut);
1419     }
1420     if (dock_strut.left)
1421         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &dock_strut);
1422     if (dock_strut.top)
1423         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &dock_strut);
1424     if (dock_strut.right)
1425         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &dock_strut);
1426     if (dock_strut.bottom)
1427         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &dock_strut);
1428
1429     if (config_margins.left)
1430         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &config_margins);
1431     if (config_margins.top)
1432         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &config_margins);
1433     if (config_margins.right)
1434         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &config_margins);
1435     if (config_margins.bottom)
1436         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &config_margins);
1437
1438     VALIDATE_STRUTS(struts_left, left,
1439                     monitor_area[screen_num_monitors].width / 2);
1440     VALIDATE_STRUTS(struts_right, right,
1441                     monitor_area[screen_num_monitors].width / 2);
1442     VALIDATE_STRUTS(struts_top, top,
1443                     monitor_area[screen_num_monitors].height / 2);
1444     VALIDATE_STRUTS(struts_bottom, bottom,
1445                     monitor_area[screen_num_monitors].height / 2);
1446
1447     dims = g_new(gulong, 4 * screen_num_desktops);
1448     for (i = 0; i < screen_num_desktops; ++i) {
1449         Rect *area = screen_area(i, SCREEN_AREA_ALL_MONITORS, NULL);
1450         dims[i*4+0] = area->x;
1451         dims[i*4+1] = area->y;
1452         dims[i*4+2] = area->width;
1453         dims[i*4+3] = area->height;
1454         g_slice_free(Rect, area);
1455     }
1456
1457     /* set the legacy workarea hint to the union of all the monitors */
1458     OBT_PROP_SETA32(obt_root(ob_screen), NET_WORKAREA, CARDINAL,
1459                     dims, 4 * screen_num_desktops);
1460
1461     /* the area has changed, adjust all the windows if they need it */
1462     for (it = onscreen; it; it = g_list_next(it)) {
1463         client_move_onscreen(it->data, FALSE);
1464         client_reconfigure(it->data, FALSE);
1465     }
1466
1467     g_free(dims);
1468 }
1469
1470 #if 0
1471 Rect* screen_area_all_monitors(guint desktop)
1472 {
1473     guint i;
1474     Rect *a;
1475
1476     a = screen_area_monitor(desktop, 0);
1477
1478     /* combine all the monitors together */
1479     for (i = 1; i < screen_num_monitors; ++i) {
1480         Rect *m = screen_area_monitor(desktop, i);
1481         gint l, r, t, b;
1482
1483         l = MIN(RECT_LEFT(*a), RECT_LEFT(*m));
1484         t = MIN(RECT_TOP(*a), RECT_TOP(*m));
1485         r = MAX(RECT_RIGHT(*a), RECT_RIGHT(*m));
1486         b = MAX(RECT_BOTTOM(*a), RECT_BOTTOM(*m));
1487
1488         RECT_SET(*a, l, t, r - l + 1, b - t + 1);
1489
1490         g_free(m);
1491     }
1492
1493     return a;
1494 }
1495 #endif
1496
1497 #define STRUT_LEFT_IN_SEARCH(s, search) \
1498     (RANGES_INTERSECT(search->y, search->height, \
1499                       s->left_start, s->left_end - s->left_start + 1))
1500 #define STRUT_RIGHT_IN_SEARCH(s, search) \
1501     (RANGES_INTERSECT(search->y, search->height, \
1502                       s->right_start, s->right_end - s->right_start + 1))
1503 #define STRUT_TOP_IN_SEARCH(s, search) \
1504     (RANGES_INTERSECT(search->x, search->width, \
1505                       s->top_start, s->top_end - s->top_start + 1))
1506 #define STRUT_BOTTOM_IN_SEARCH(s, search) \
1507     (RANGES_INTERSECT(search->x, search->width, \
1508                       s->bottom_start, s->bottom_end - s->bottom_start + 1))
1509
1510 #define STRUT_LEFT_IGNORE(s, us, search) \
1511     (head == SCREEN_AREA_ALL_MONITORS && us && \
1512      RECT_LEFT(monitor_area[i]) + s->left > RECT_LEFT(*search))
1513 #define STRUT_RIGHT_IGNORE(s, us, search) \
1514     (head == SCREEN_AREA_ALL_MONITORS && us && \
1515      RECT_RIGHT(monitor_area[i]) - s->right < RECT_RIGHT(*search))
1516 #define STRUT_TOP_IGNORE(s, us, search) \
1517     (head == SCREEN_AREA_ALL_MONITORS && us && \
1518      RECT_TOP(monitor_area[i]) + s->top > RECT_TOP(*search))
1519 #define STRUT_BOTTOM_IGNORE(s, us, search) \
1520     (head == SCREEN_AREA_ALL_MONITORS && us && \
1521      RECT_BOTTOM(monitor_area[i]) - s->bottom < RECT_BOTTOM(*search))
1522
1523 Rect* screen_area(guint desktop, guint head, Rect *search)
1524 {
1525     Rect *a;
1526     GSList *it;
1527     gint l, r, t, b;
1528     guint i, d;
1529     gboolean us = search != NULL; /* user provided search */
1530
1531     g_assert(desktop < screen_num_desktops || desktop == DESKTOP_ALL);
1532     g_assert(head < screen_num_monitors || head == SCREEN_AREA_ONE_MONITOR ||
1533              head == SCREEN_AREA_ALL_MONITORS);
1534     g_assert(!(head == SCREEN_AREA_ONE_MONITOR && search == NULL));
1535
1536     /* find any struts for this monitor
1537        which will be affecting the search area.
1538     */
1539
1540     /* search everything if search is null */
1541     if (!search) {
1542         if (head < screen_num_monitors) search = &monitor_area[head];
1543         else search = &monitor_area[screen_num_monitors];
1544     }
1545     if (head == SCREEN_AREA_ONE_MONITOR) head = screen_find_monitor(search);
1546
1547     /* al is "all left" meaning the furthest left you can get, l is our
1548        "working left" meaning our current strut edge which we're calculating
1549     */
1550
1551     /* only include monitors which the search area lines up with */
1552     if (RECT_INTERSECTS_RECT(monitor_area[screen_num_monitors], *search)) {
1553         l = RECT_RIGHT(monitor_area[screen_num_monitors]);
1554         t = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1555         r = RECT_LEFT(monitor_area[screen_num_monitors]);
1556         b = RECT_TOP(monitor_area[screen_num_monitors]);
1557         for (i = 0; i < screen_num_monitors; ++i) {
1558             /* add the monitor if applicable */
1559             if (RANGES_INTERSECT(search->x, search->width,
1560                                  monitor_area[i].x, monitor_area[i].width))
1561             {
1562                 t = MIN(t, RECT_TOP(monitor_area[i]));
1563                 b = MAX(b, RECT_BOTTOM(monitor_area[i]));
1564             }
1565             if (RANGES_INTERSECT(search->y, search->height,
1566                                  monitor_area[i].y, monitor_area[i].height))
1567             {
1568                 l = MIN(l, RECT_LEFT(monitor_area[i]));
1569                 r = MAX(r, RECT_RIGHT(monitor_area[i]));
1570             }
1571         }
1572     } else {
1573         l = RECT_LEFT(monitor_area[screen_num_monitors]);
1574         t = RECT_TOP(monitor_area[screen_num_monitors]);
1575         r = RECT_RIGHT(monitor_area[screen_num_monitors]);
1576         b = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1577     }
1578
1579     for (d = 0; d < screen_num_desktops; ++d) {
1580         if (d != desktop && desktop != DESKTOP_ALL) continue;
1581
1582         for (i = 0; i < screen_num_monitors; ++i) {
1583             if (head != SCREEN_AREA_ALL_MONITORS && head != i) continue;
1584
1585             for (it = struts_left; it; it = g_slist_next(it)) {
1586                 ObScreenStrut *s = it->data;
1587                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1588                     STRUT_LEFT_IN_SEARCH(s->strut, search) &&
1589                     !STRUT_LEFT_IGNORE(s->strut, us, search))
1590                     l = MAX(l, RECT_LEFT(monitor_area[screen_num_monitors])
1591                                + s->strut->left);
1592             }
1593             for (it = struts_top; it; it = g_slist_next(it)) {
1594                 ObScreenStrut *s = it->data;
1595                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1596                     STRUT_TOP_IN_SEARCH(s->strut, search) &&
1597                     !STRUT_TOP_IGNORE(s->strut, us, search))
1598                     t = MAX(t, RECT_TOP(monitor_area[screen_num_monitors])
1599                                + s->strut->top);
1600             }
1601             for (it = struts_right; it; it = g_slist_next(it)) {
1602                 ObScreenStrut *s = it->data;
1603                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1604                     STRUT_RIGHT_IN_SEARCH(s->strut, search) &&
1605                     !STRUT_RIGHT_IGNORE(s->strut, us, search))
1606                     r = MIN(r, RECT_RIGHT(monitor_area[screen_num_monitors])
1607                                - s->strut->right);
1608             }
1609             for (it = struts_bottom; it; it = g_slist_next(it)) {
1610                 ObScreenStrut *s = it->data;
1611                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1612                     STRUT_BOTTOM_IN_SEARCH(s->strut, search) &&
1613                     !STRUT_BOTTOM_IGNORE(s->strut, us, search))
1614                     b = MIN(b, RECT_BOTTOM(monitor_area[screen_num_monitors])
1615                                - s->strut->bottom);
1616             }
1617
1618             /* limit to this monitor */
1619             if (head == i) {
1620                 l = MAX(l, RECT_LEFT(monitor_area[i]));
1621                 t = MAX(t, RECT_TOP(monitor_area[i]));
1622                 r = MIN(r, RECT_RIGHT(monitor_area[i]));
1623                 b = MIN(b, RECT_BOTTOM(monitor_area[i]));
1624             }
1625         }
1626     }
1627
1628     a = g_slice_new(Rect);
1629     a->x = l;
1630     a->y = t;
1631     a->width = r - l + 1;
1632     a->height = b - t + 1;
1633     return a;
1634 }
1635
1636 guint screen_find_monitor(const Rect *search)
1637 {
1638     guint i;
1639     guint most = screen_num_monitors;
1640     guint mostv = 0;
1641
1642     for (i = 0; i < screen_num_monitors; ++i) {
1643         const Rect *area = screen_physical_area_monitor(i);
1644         if (RECT_INTERSECTS_RECT(*area, *search)) {
1645             Rect r;
1646             guint v;
1647
1648             RECT_SET_INTERSECTION(r, *area, *search);
1649             v = r.width * r.height;
1650
1651             if (v > mostv) {
1652                 mostv = v;
1653                 most = i;
1654             }
1655         }
1656     }
1657     return most;
1658 }
1659
1660 const Rect* screen_physical_area_all_monitors(void)
1661 {
1662     return screen_physical_area_monitor(screen_num_monitors);
1663 }
1664
1665 const Rect* screen_physical_area_monitor(guint head)
1666 {
1667     g_assert(head <= screen_num_monitors);
1668
1669     return &monitor_area[head];
1670 }
1671
1672 gboolean screen_physical_area_monitor_contains(guint head, Rect *search)
1673 {
1674     g_assert(head <= screen_num_monitors);
1675     g_assert(search);
1676     return RECT_INTERSECTS_RECT(monitor_area[head], *search);
1677 }
1678
1679 guint screen_monitor_active(void)
1680 {
1681     if (moveresize_client)
1682         return client_monitor(moveresize_client);
1683     else if (focus_client)
1684         return client_monitor(focus_client);
1685     else
1686         return screen_monitor_pointer();
1687 }
1688
1689 const Rect* screen_physical_area_active(void)
1690 {
1691     return screen_physical_area_monitor(screen_monitor_active());
1692 }
1693
1694 guint screen_monitor_primary(gboolean fixed)
1695 {
1696     if (config_primary_monitor_index > 0) {
1697         if (config_primary_monitor_index-1 < screen_num_monitors)
1698             return config_primary_monitor_index - 1;
1699         else
1700             return 0;
1701     }
1702     else if (fixed)
1703         return 0;
1704     else if (config_primary_monitor == OB_PLACE_MONITOR_ACTIVE)
1705         return screen_monitor_active();
1706     else /* config_primary_monitor == OB_PLACE_MONITOR_MOUSE */
1707         return screen_monitor_pointer();
1708 }
1709
1710 const Rect* screen_physical_area_primary(gboolean fixed)
1711 {
1712     return screen_physical_area_monitor(screen_monitor_primary(fixed));
1713 }
1714
1715 void screen_set_root_cursor(void)
1716 {
1717     if (sn_app_starting())
1718         XDefineCursor(obt_display, obt_root(ob_screen),
1719                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1720     else
1721         XDefineCursor(obt_display, obt_root(ob_screen),
1722                       ob_cursor(OB_CURSOR_POINTER));
1723 }
1724
1725 guint screen_find_monitor_point(guint x, guint y)
1726 {
1727     Rect mon;
1728     RECT_SET(mon, x, y, 1, 1);
1729     return screen_find_monitor(&mon);
1730 }
1731
1732 guint screen_monitor_pointer()
1733 {
1734     gint x, y;
1735     if (!screen_pointer_pos(&x, &y))
1736         x = y = 0;
1737     return screen_find_monitor_point(x, y);
1738 }
1739
1740 gboolean screen_pointer_pos(gint *x, gint *y)
1741 {
1742     Window w;
1743     gint i;
1744     guint u;
1745     gboolean ret;
1746
1747     ret = !!XQueryPointer(obt_display, obt_root(ob_screen),
1748                           &w, &w, x, y, &i, &i, &u);
1749     if (!ret) {
1750         for (i = 0; i < ScreenCount(obt_display); ++i)
1751             if (i != ob_screen)
1752                 if (XQueryPointer(obt_display, obt_root(i),
1753                                   &w, &w, x, y, &i, &i, &u))
1754                     break;
1755     }
1756     return ret;
1757 }