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                         SubstructureNotifyMask)
  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 static guint    screen_desktop_timer = 0;
  75 /*! An array of desktops, holding an array of areas per monitor */
  76 static Rect  *monitor_area = NULL;
  77 /*! An array of desktops, holding an array of struts */
  78 static GSList *struts_top = NULL;
  79 static GSList *struts_left = NULL;
  80 static GSList *struts_right = NULL;
  81 static GSList *struts_bottom = NULL;
  82
  83 static ObPagerPopup *desktop_popup;
  84 static guint         desktop_popup_timer = 0;
  85 static gboolean      desktop_popup_perm;
  86
  87 /*! The number of microseconds that you need to be on a desktop before it will
  88   replace the remembered "last desktop" */
  89 #define REMEMBER_LAST_DESKTOP_TIME 750
  90
  91 static gboolean replace_wm(void)
  92 {
  93     gchar *wm_sn;
  94     Atom wm_sn_atom;
  95     Window current_wm_sn_owner;
  96     Time timestamp;
  97
  98     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  99     wm_sn_atom = XInternAtom(obt_display, wm_sn, FALSE);
 100     g_free(wm_sn);
 101
 102     current_wm_sn_owner = XGetSelectionOwner(obt_display, wm_sn_atom);
 103     if (current_wm_sn_owner == screen_support_win)
 104         current_wm_sn_owner = None;
 105     if (current_wm_sn_owner) {
 106         if (!ob_replace_wm) {
 107             g_message(_("A window manager is already running on screen %d"),
 108                       ob_screen);
 109             return FALSE;
 110         }
 111         obt_display_ignore_errors(TRUE);
 112
 113         /* We want to find out when the current selection owner dies */
 114         XSelectInput(obt_display, current_wm_sn_owner, StructureNotifyMask);
 115         XSync(obt_display, FALSE);
 116
 117         obt_display_ignore_errors(FALSE);
 118         if (obt_display_error_occured)
 119             current_wm_sn_owner = None;
 120     }
 121
 122     timestamp = event_time();
 123
 124     XSetSelectionOwner(obt_display, wm_sn_atom, screen_support_win,
 125                        timestamp);
 126
 127     if (XGetSelectionOwner(obt_display, wm_sn_atom) != screen_support_win) {
 128         g_message(_("Could not acquire window manager selection on screen %d"),
 129                   ob_screen);
 130         return FALSE;
 131     }
 132
 133     /* Wait for old window manager to go away */
 134     if (current_wm_sn_owner) {
 135       gulong wait = 0;
 136       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 137       ObtXQueueWindowType wt;
 138
 139       wt.window = current_wm_sn_owner;
 140       wt.type = DestroyNotify;
 141
 142       while (wait < timeout) {
 143           /* Checks the local queue and incoming events for this event */
 144           if (xqueue_exists_local(xqueue_match_window_type, &wt))
 145               break;
 146           g_usleep(G_USEC_PER_SEC / 10);
 147           wait += G_USEC_PER_SEC / 10;
 148       }
 149
 150       if (wait >= timeout) {
 151           g_message(_("The WM on screen %d is not exiting"), ob_screen);
 152           return FALSE;
 153       }
 154     }
 155
 156     /* Send client message indicating that we are now the WM */
 157     obt_prop_message(ob_screen, obt_root(ob_screen), OBT_PROP_ATOM(MANAGER),
 158                      timestamp, wm_sn_atom, screen_support_win, 0, 0,
 159                      SubstructureNotifyMask);
 160
 161     return TRUE;
 162 }
 163
 164 gboolean screen_annex(void)
 165 {
 166     XSetWindowAttributes attrib;
 167     pid_t pid;
 168     gint i, num_support;
 169     gulong *supported;
 170
 171     /* create the netwm support window */
 172     attrib.override_redirect = TRUE;
 173     attrib.event_mask = PropertyChangeMask;
 174     screen_support_win = XCreateWindow(obt_display, obt_root(ob_screen),
 175                                        -100, -100, 1, 1, 0,
 176                                        CopyFromParent, InputOutput,
 177                                        CopyFromParent,
 178                                        CWEventMask | CWOverrideRedirect,
 179                                        &attrib);
 180     XMapWindow(obt_display, screen_support_win);
 181     XLowerWindow(obt_display, screen_support_win);
 182
 183     if (!replace_wm()) {
 184         XDestroyWindow(obt_display, screen_support_win);
 185         return FALSE;
 186     }
 187
 188     obt_display_ignore_errors(TRUE);
 189     XSelectInput(obt_display, obt_root(ob_screen), ROOT_EVENTMASK);
 190     obt_display_ignore_errors(FALSE);
 191     if (obt_display_error_occured) {
 192         g_message(_("A window manager is already running on screen %d"),
 193                   ob_screen);
 194
 195         XDestroyWindow(obt_display, screen_support_win);
 196         return FALSE;
 197     }
 198
 199     screen_set_root_cursor();
 200
 201     /* set the OPENBOX_PID hint */
 202     pid = getpid();
 203     OBT_PROP_SET32(obt_root(ob_screen), OPENBOX_PID, CARDINAL, pid);
 204
 205     /* set supporting window */
 206     OBT_PROP_SET32(obt_root(ob_screen),
 207                    NET_SUPPORTING_WM_CHECK, WINDOW, screen_support_win);
 208
 209     /* set properties on the supporting window */
 210     OBT_PROP_SETS(screen_support_win, NET_WM_NAME, utf8, "Openbox");
 211     OBT_PROP_SET32(screen_support_win, NET_SUPPORTING_WM_CHECK,
 212                    WINDOW, screen_support_win);
 213
 214     /* set the _NET_SUPPORTED_ATOMS hint */
 215
 216     /* this is all the atoms after NET_SUPPORTED in the ObtPropAtoms enum */
 217     num_support = OBT_PROP_NUM_ATOMS - OBT_PROP_NET_SUPPORTED - 1;
 218     i = 0;
 219     supported = g_new(gulong, num_support);
 220     supported[i++] = OBT_PROP_ATOM(NET_SUPPORTING_WM_CHECK);
 221     supported[i++] = OBT_PROP_ATOM(NET_WM_FULL_PLACEMENT);
 222     supported[i++] = OBT_PROP_ATOM(NET_CURRENT_DESKTOP);
 223     supported[i++] = OBT_PROP_ATOM(NET_NUMBER_OF_DESKTOPS);
 224     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_GEOMETRY);
 225     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_VIEWPORT);
 226     supported[i++] = OBT_PROP_ATOM(NET_ACTIVE_WINDOW);
 227     supported[i++] = OBT_PROP_ATOM(NET_WORKAREA);
 228     supported[i++] = OBT_PROP_ATOM(NET_CLIENT_LIST);
 229     supported[i++] = OBT_PROP_ATOM(NET_CLIENT_LIST_STACKING);
 230     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_NAMES);
 231     supported[i++] = OBT_PROP_ATOM(NET_CLOSE_WINDOW);
 232     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_LAYOUT);
 233     supported[i++] = OBT_PROP_ATOM(NET_SHOWING_DESKTOP);
 234     supported[i++] = OBT_PROP_ATOM(NET_WM_NAME);
 235     supported[i++] = OBT_PROP_ATOM(NET_WM_VISIBLE_NAME);
 236     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON_NAME);
 237     supported[i++] = OBT_PROP_ATOM(NET_WM_VISIBLE_ICON_NAME);
 238     supported[i++] = OBT_PROP_ATOM(NET_WM_DESKTOP);
 239     supported[i++] = OBT_PROP_ATOM(NET_WM_STRUT);
 240     supported[i++] = OBT_PROP_ATOM(NET_WM_STRUT_PARTIAL);
 241     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON);
 242     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON_GEOMETRY);
 243     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE);
 244     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DESKTOP);
 245     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DOCK);
 246     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_TOOLBAR);
 247     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_MENU);
 248     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_UTILITY);
 249     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_SPLASH);
 250     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DIALOG);
 251     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_NORMAL);
 252     supported[i++] = OBT_PROP_ATOM(NET_WM_ALLOWED_ACTIONS);
 253     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MOVE);
 254     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_RESIZE);
 255     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MINIMIZE);
 256     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_SHADE);
 257     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MAXIMIZE_HORZ);
 258     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MAXIMIZE_VERT);
 259     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_FULLSCREEN);
 260     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_CHANGE_DESKTOP);
 261     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_CLOSE);
 262     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_ABOVE);
 263     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_BELOW);
 264     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE);
 265     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MODAL);
 266     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MAXIMIZED_VERT);
 267     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MAXIMIZED_HORZ);
 268     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SHADED);
 269     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SKIP_TASKBAR);
 270     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SKIP_PAGER);
 271     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_HIDDEN);
 272     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_FULLSCREEN);
 273     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_ABOVE);
 274     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_BELOW);
 275     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_DEMANDS_ATTENTION);
 276     supported[i++] = OBT_PROP_ATOM(NET_MOVERESIZE_WINDOW);
 277     supported[i++] = OBT_PROP_ATOM(NET_WM_MOVERESIZE);
 278     supported[i++] = OBT_PROP_ATOM(NET_WM_USER_TIME);
 279 /*
 280     supported[i++] = OBT_PROP_ATOM(NET_WM_USER_TIME_WINDOW);
 281 */
 282     supported[i++] = OBT_PROP_ATOM(NET_FRAME_EXTENTS);
 283     supported[i++] = OBT_PROP_ATOM(NET_REQUEST_FRAME_EXTENTS);
 284     supported[i++] = OBT_PROP_ATOM(NET_RESTACK_WINDOW);
 285     supported[i++] = OBT_PROP_ATOM(NET_STARTUP_ID);
 286 #ifdef SYNC
 287     supported[i++] = OBT_PROP_ATOM(NET_WM_SYNC_REQUEST);
 288     supported[i++] = OBT_PROP_ATOM(NET_WM_SYNC_REQUEST_COUNTER);
 289 #endif
 290     supported[i++] = OBT_PROP_ATOM(NET_WM_PID);
 291     supported[i++] = OBT_PROP_ATOM(NET_WM_PING);
 292
 293     supported[i++] = OBT_PROP_ATOM(KDE_WM_CHANGE_STATE);
 294     supported[i++] = OBT_PROP_ATOM(KDE_NET_WM_FRAME_STRUT);
 295     supported[i++] = OBT_PROP_ATOM(KDE_NET_WM_WINDOW_TYPE_OVERRIDE);
 296
 297     supported[i++] = OBT_PROP_ATOM(OB_WM_ACTION_UNDECORATE);
 298     supported[i++] = OBT_PROP_ATOM(OB_WM_STATE_UNDECORATED);
 299     supported[i++] = OBT_PROP_ATOM(OPENBOX_PID);
 300     supported[i++] = OBT_PROP_ATOM(OB_THEME);
 301     supported[i++] = OBT_PROP_ATOM(OB_CONFIG_FILE);
 302     supported[i++] = OBT_PROP_ATOM(OB_CONTROL);
 303     supported[i++] = OBT_PROP_ATOM(OB_VERSION);
 304     supported[i++] = OBT_PROP_ATOM(OB_APP_ROLE);
 305     supported[i++] = OBT_PROP_ATOM(OB_APP_TITLE);
 306     supported[i++] = OBT_PROP_ATOM(OB_APP_NAME);
 307     supported[i++] = OBT_PROP_ATOM(OB_APP_CLASS);
 308     supported[i++] = OBT_PROP_ATOM(OB_APP_TYPE);
 309     g_assert(i == num_support);
 310
 311     OBT_PROP_SETA32(obt_root(ob_screen),
 312                     NET_SUPPORTED, ATOM, supported, num_support);
 313     g_free(supported);
 314
 315     OBT_PROP_SETS(RootWindow(obt_display, ob_screen), OB_VERSION, utf8,
 316                   OPENBOX_VERSION);
 317
 318     screen_tell_ksplash();
 319
 320     return TRUE;
 321 }
 322
 323 static void screen_tell_ksplash(void)
 324 {
 325     XEvent e;
 326     char **argv;
 327
 328     argv = g_new(gchar*, 6);
 329     argv[0] = g_strdup("dcop");
 330     argv[1] = g_strdup("ksplash");
 331     argv[2] = g_strdup("ksplash");
 332     argv[3] = g_strdup("upAndRunning(QString)");
 333     argv[4] = g_strdup("wm started");
 334     argv[5] = NULL;
 335
 336     /* tell ksplash through the dcop server command line interface */
 337     g_spawn_async(NULL, argv, NULL,
 338                   G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
 339                   G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
 340                   NULL, NULL, NULL, NULL);
 341     g_strfreev(argv);
 342
 343     /* i'm not sure why we do this, kwin does it, but ksplash doesn't seem to
 344        hear it anyways. perhaps it is for old ksplash. or new ksplash. or
 345        something. oh well. */
 346     e.xclient.type = ClientMessage;
 347     e.xclient.display = obt_display;
 348     e.xclient.window = obt_root(ob_screen);
 349     e.xclient.message_type =
 350         XInternAtom(obt_display, "_KDE_SPLASH_PROGRESS", False);
 351     e.xclient.format = 8;
 352     strcpy(e.xclient.data.b, "wm started");
 353     XSendEvent(obt_display, obt_root(ob_screen),
 354                False, SubstructureNotifyMask, &e);
 355 }
 356
 357 void screen_startup(gboolean reconfig)
 358 {
 359     gchar **names = NULL;
 360     guint32 d;
 361     gboolean namesexist = FALSE;
 362
 363     desktop_popup = pager_popup_new();
 364     desktop_popup_perm = FALSE;
 365     pager_popup_height(desktop_popup, POPUP_HEIGHT);
 366
 367     if (reconfig) {
 368         /* update the pager popup's width */
 369         pager_popup_text_width_to_strings(desktop_popup,
 370                                           screen_desktop_names,
 371                                           screen_num_desktops);
 372         return;
 373     }
 374
 375     /* get the initial size */
 376     screen_resize();
 377
 378     /* have names already been set for the desktops? */
 379     if (OBT_PROP_GETSS(obt_root(ob_screen), NET_DESKTOP_NAMES, utf8, &names)) {
 380         g_strfreev(names);
 381         namesexist = TRUE;
 382     }
 383
 384     /* if names don't exist and we have session names, set those.
 385        do this stuff BEFORE setting the number of desktops, because that
 386        will create default names for them
 387     */
 388     if (!namesexist && session_desktop_names != NULL) {
 389         guint i, numnames;
 390         GSList *it;
 391
 392         /* get the desktop names */
 393         numnames = g_slist_length(session_desktop_names);
 394         names = g_new(gchar*, numnames + 1);
 395         names[numnames] = NULL;
 396         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
 397             names[i] = g_strdup(it->data);
 398
 399         /* set the root window property */
 400         OBT_PROP_SETSS(obt_root(ob_screen),
 401                        NET_DESKTOP_NAMES, utf8, (const gchar*const*)names);
 402
 403         g_strfreev(names);
 404     }
 405
 406     /* set the number of desktops, if it's not already set.
 407
 408        this will also set the default names from the config file up for
 409        desktops that don't have names yet */
 410     screen_num_desktops = 0;
 411     if (OBT_PROP_GET32(obt_root(ob_screen),
 412                        NET_NUMBER_OF_DESKTOPS, CARDINAL, &d))
 413     {
 414         if (d != config_desktops_num) {
 415             /* TRANSLATORS: If you need to specify a different order of the
 416                arguments, you can use %1$d for the first one and %2$d for the
 417                second one. For example,
 418                "The current session has %2$d desktops, but Openbox is configured for %1$d ..." */
 419             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),
 420                       config_desktops_num, d);
 421         }
 422         screen_set_num_desktops(d);
 423     }
 424     /* restore from session if possible */
 425     else if (session_num_desktops)
 426         screen_set_num_desktops(session_num_desktops);
 427     else
 428         screen_set_num_desktops(config_desktops_num);
 429
 430     screen_desktop = screen_num_desktops;  /* something invalid */
 431     /* start on the current desktop when a wm was already running */
 432     if (OBT_PROP_GET32(obt_root(ob_screen),
 433                        NET_CURRENT_DESKTOP, CARDINAL, &d) &&
 434         d < screen_num_desktops)
 435     {
 436         screen_set_desktop(d, FALSE);
 437     } else if (session_desktop >= 0)
 438         screen_set_desktop(MIN((guint)session_desktop,
 439                                screen_num_desktops), FALSE);
 440     else
 441         screen_set_desktop(MIN(config_screen_firstdesk,
 442                                screen_num_desktops) - 1, FALSE);
 443     screen_last_desktop = screen_desktop;
 444
 445     /* don't start in showing-desktop mode */
 446     screen_showing_desktop = FALSE;
 447     OBT_PROP_SET32(obt_root(ob_screen),
 448                    NET_SHOWING_DESKTOP, CARDINAL, screen_showing_desktop);
 449
 450     if (session_desktop_layout_present &&
 451         screen_validate_layout(&session_desktop_layout))
 452     {
 453         screen_desktop_layout = session_desktop_layout;
 454     }
 455     else
 456         screen_update_layout();
 457 }
 458
 459 void screen_shutdown(gboolean reconfig)
 460 {
 461     pager_popup_free(desktop_popup);
 462
 463     if (reconfig)
 464         return;
 465
 466     XSelectInput(obt_display, obt_root(ob_screen), NoEventMask);
 467
 468     /* we're not running here no more! */
 469     OBT_PROP_ERASE(obt_root(ob_screen), OPENBOX_PID);
 470     /* not without us */
 471     OBT_PROP_ERASE(obt_root(ob_screen), NET_SUPPORTED);
 472     /* don't keep this mode */
 473     OBT_PROP_ERASE(obt_root(ob_screen), NET_SHOWING_DESKTOP);
 474
 475     XDestroyWindow(obt_display, screen_support_win);
 476
 477     g_strfreev(screen_desktop_names);
 478     screen_desktop_names = NULL;
 479 }
 480
 481 void screen_resize(void)
 482 {
 483     static gint oldw = 0, oldh = 0;
 484     gint w, h;
 485     GList *it;
 486     gulong geometry[2];
 487
 488     w = WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen));
 489     h = HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen));
 490
 491     if (w == oldw && h == oldh) return;
 492
 493     oldw = w; oldh = h;
 494
 495     /* Set the _NET_DESKTOP_GEOMETRY hint */
 496     screen_physical_size.width = geometry[0] = w;
 497     screen_physical_size.height = geometry[1] = h;
 498     OBT_PROP_SETA32(obt_root(ob_screen),
 499                     NET_DESKTOP_GEOMETRY, CARDINAL, geometry, 2);
 500
 501     if (ob_state() != OB_STATE_RUNNING)
 502         return;
 503
 504     screen_update_areas();
 505     dock_configure();
 506
 507     for (it = client_list; it; it = g_list_next(it))
 508         client_move_onscreen(it->data, FALSE);
 509 }
 510
 511 void screen_set_num_desktops(guint num)
 512 {
 513     gulong *viewport;
 514     GList *it, *stacking_copy;
 515
 516     g_assert(num > 0);
 517
 518     if (screen_num_desktops == num) return;
 519
 520     screen_num_desktops = num;
 521     OBT_PROP_SET32(obt_root(ob_screen), NET_NUMBER_OF_DESKTOPS, CARDINAL, num);
 522
 523     /* set the viewport hint */
 524     viewport = g_new0(gulong, num * 2);
 525     OBT_PROP_SETA32(obt_root(ob_screen),
 526                     NET_DESKTOP_VIEWPORT, CARDINAL, viewport, num * 2);
 527     g_free(viewport);
 528
 529     /* the number of rows/columns will differ */
 530     screen_update_layout();
 531
 532     /* move windows on desktops that will no longer exist!
 533        make a copy of the list cuz we're changing it */
 534     stacking_copy = g_list_copy(stacking_list);
 535     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 536         if (WINDOW_IS_CLIENT(it->data)) {
 537             ObClient *c = it->data;
 538             if (c->desktop != DESKTOP_ALL && c->desktop >= num)
 539                 client_set_desktop(c, num - 1, FALSE, TRUE);
 540             /* raise all the windows that are on the current desktop which
 541                is being merged */
 542             else if (screen_desktop == num - 1 &&
 543                      (c->desktop == DESKTOP_ALL ||
 544                       c->desktop == screen_desktop))
 545                 stacking_raise(CLIENT_AS_WINDOW(c));
 546         }
 547     }
 548     g_list_free(stacking_copy);
 549
 550     /* change our struts/area to match (after moving windows) */
 551     screen_update_areas();
 552
 553     /* may be some unnamed desktops that we need to fill in with names
 554        (after updating the areas so the popup can resize) */
 555     screen_update_desktop_names();
 556
 557     /* change our desktop if we're on one that no longer exists! */
 558     if (screen_desktop >= screen_num_desktops)
 559         screen_set_desktop(num - 1, TRUE);
 560 }
 561
 562 static void screen_fallback_focus(void)
 563 {
 564     ObClient *c;
 565     gboolean allow_omni;
 566
 567     /* only allow omnipresent windows to get focus on desktop change if
 568        an omnipresent window is already focused (it'll keep focus probably, but
 569        maybe not depending on mouse-focus options) */
 570     allow_omni = focus_client && (client_normal(focus_client) &&
 571                                   focus_client->desktop == DESKTOP_ALL);
 572
 573     /* the client moved there already so don't move focus. prevent flicker
 574        on sendtodesktop + follow */
 575     if (focus_client && focus_client->desktop == screen_desktop)
 576         return;
 577
 578     /* have to try focus here because when you leave an empty desktop
 579        there is no focus out to watch for. also, we have different rules
 580        here. we always allow it to look under the mouse pointer if
 581        config_focus_last is FALSE
 582
 583        do this before hiding the windows so if helper windows are coming
 584        with us, they don't get hidden
 585     */
 586     if ((c = focus_fallback(TRUE, !config_focus_last, allow_omni,
 587                             !allow_omni)))
 588     {
 589         /* only do the flicker reducing stuff ahead of time if we are going
 590            to call xsetinputfocus on the window ourselves. otherwise there is
 591            no guarantee the window will actually take focus.. */
 592         if (c->can_focus) {
 593             /* reduce flicker by hiliting now rather than waiting for the
 594                server FocusIn event */
 595             frame_adjust_focus(c->frame, TRUE);
 596             /* do this here so that if you switch desktops to a window with
 597                helper windows then the helper windows won't flash */
 598             client_bring_helper_windows(c);
 599         }
 600     }
 601 }
 602
 603 static gboolean last_desktop_func(gpointer data)
 604 {
 605     screen_desktop_timeout = TRUE;
 606     screen_desktop_timer = 0;
 607     return FALSE; /* don't repeat */
 608 }
 609
 610 void screen_set_desktop(guint num, gboolean dofocus)
 611 {
 612     GList *it;
 613     guint previous;
 614     gulong ignore_start;
 615
 616     g_assert(num < screen_num_desktops);
 617
 618     previous = screen_desktop;
 619     screen_desktop = num;
 620
 621     if (previous == num) return;
 622
 623     OBT_PROP_SET32(obt_root(ob_screen), NET_CURRENT_DESKTOP, CARDINAL, num);
 624
 625     /* This whole thing decides when/how to save the screen_last_desktop so
 626        that it can be restored later if you want */
 627     if (screen_desktop_timeout) {
 628         /* If screen_desktop_timeout is true, then we've been on this desktop
 629            long enough and we can save it as the last desktop. */
 630
 631         if (screen_last_desktop == previous)
 632             /* this is the startup state only */
 633             screen_old_desktop = screen_desktop;
 634         else {
 635             /* save the "last desktop" as the "old desktop" */
 636             screen_old_desktop = screen_last_desktop;
 637             /* save the desktop we're coming from as the "last desktop" */
 638             screen_last_desktop = previous;
 639         }
 640     }
 641     else {
 642         /* If screen_desktop_timeout is false, then we just got to this desktop
 643            and we are moving away again. */
 644
 645         if (screen_desktop == screen_last_desktop) {
 646             /* If we are moving to the "last desktop" .. */
 647             if (previous == screen_old_desktop) {
 648                 /* .. from the "old desktop", change the last desktop to
 649                    be where we are coming from */
 650                 screen_last_desktop = screen_old_desktop;
 651             }
 652             else if (screen_last_desktop == screen_old_desktop) {
 653                 /* .. and also to the "old desktop", change the "last
 654                    desktop" to be where we are coming from */
 655                 screen_last_desktop = previous;
 656             }
 657             else {
 658                 /* .. from some other desktop, then set the "last desktop" to
 659                    be the saved "old desktop", i.e. where we were before the
 660                    "last desktop" */
 661                 screen_last_desktop = screen_old_desktop;
 662             }
 663         }
 664         else {
 665             /* If we are moving to any desktop besides the "last desktop"..
 666                (this is the normal case) */
 667             if (screen_desktop == screen_old_desktop) {
 668                 /* If moving to the "old desktop", which is not the
 669                    "last desktop", don't save anything */
 670             }
 671             else if (previous == screen_old_desktop) {
 672                 /* If moving from the "old desktop", and not to the
 673                    "last desktop", don't save anything */
 674             }
 675             else if (screen_last_desktop == screen_old_desktop) {
 676                 /* If the "last desktop" is the same as "old desktop" and
 677                    you're not moving to the "last desktop" then save where
 678                    we're coming from as the "last desktop" */
 679                 screen_last_desktop = previous;
 680             }
 681             else {
 682                 /* If the "last desktop" is different from the "old desktop"
 683                    and you're not moving to the "last desktop", then don't save
 684                    anything */
 685             }
 686         }
 687     }
 688     screen_desktop_timeout = FALSE;
 689     if (screen_desktop_timer) g_source_remove(screen_desktop_timer);
 690     screen_desktop_timer = g_timeout_add(REMEMBER_LAST_DESKTOP_TIME,
 691                                          last_desktop_func, NULL);
 692
 693     ob_debug("Moving to desktop %d", num+1);
 694
 695     if (ob_state() == OB_STATE_RUNNING)
 696         screen_show_desktop_popup(screen_desktop, FALSE);
 697
 698     /* ignore enter events caused by the move */
 699     ignore_start = event_start_ignore_all_enters();
 700
 701     if (moveresize_client)
 702         client_set_desktop(moveresize_client, num, TRUE, FALSE);
 703
 704     /* show windows before hiding the rest to lessen the enter/leave events */
 705
 706     /* show windows from top to bottom */
 707     for (it = stacking_list; it; it = g_list_next(it)) {
 708         if (WINDOW_IS_CLIENT(it->data)) {
 709             ObClient *c = it->data;
 710             client_show(c);
 711         }
 712     }
 713
 714     if (dofocus) screen_fallback_focus();
 715
 716     /* hide windows from bottom to top */
 717     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 718         if (WINDOW_IS_CLIENT(it->data)) {
 719             ObClient *c = it->data;
 720             if (client_hide(c)) {
 721                 if (c == focus_client) {
 722                     /* c was focused and we didn't do fallback clearly so make
 723                        sure openbox doesnt still consider the window focused.
 724                        this happens when using NextWindow with allDesktops,
 725                        since it doesnt want to move focus on desktop change,
 726                        but the focus is not going to stay with the current
 727                        window, which has now disappeared.
 728                        only do this if the client was actually hidden,
 729                        otherwise it can keep focus. */
 730                     focus_set_client(NULL);
 731                 }
 732             }
 733         }
 734     }
 735
 736     focus_cycle_addremove(NULL, TRUE);
 737
 738     event_end_ignore_all_enters(ignore_start);
 739
 740     if (event_source_time() != CurrentTime)
 741         screen_desktop_user_time = event_source_time();
 742 }
 743
 744 void screen_add_desktop(gboolean current)
 745 {
 746     gulong ignore_start;
 747
 748     /* ignore enter events caused by this */
 749     ignore_start = event_start_ignore_all_enters();
 750
 751     screen_set_num_desktops(screen_num_desktops+1);
 752
 753     /* move all the clients over */
 754     if (current) {
 755         GList *it;
 756
 757         for (it = client_list; it; it = g_list_next(it)) {
 758             ObClient *c = it->data;
 759             if (c->desktop != DESKTOP_ALL && c->desktop >= screen_desktop &&
 760                 /* don't move direct children, they'll be moved with their
 761                    parent - which will have to be on the same desktop */
 762                 !client_direct_parent(c))
 763             {
 764                 ob_debug("moving window %s", c->title);
 765                 client_set_desktop(c, c->desktop+1, FALSE, TRUE);
 766             }
 767         }
 768     }
 769
 770     event_end_ignore_all_enters(ignore_start);
 771 }
 772
 773 void screen_remove_desktop(gboolean current)
 774 {
 775     guint rmdesktop, movedesktop;
 776     GList *it, *stacking_copy;
 777     gulong ignore_start;
 778
 779     if (screen_num_desktops <= 1) return;
 780
 781     /* ignore enter events caused by this */
 782     ignore_start = event_start_ignore_all_enters();
 783
 784     /* what desktop are we removing and moving to? */
 785     if (current)
 786         rmdesktop = screen_desktop;
 787     else
 788         rmdesktop = screen_num_desktops - 1;
 789     if (rmdesktop < screen_num_desktops - 1)
 790         movedesktop = rmdesktop + 1;
 791     else
 792         movedesktop = rmdesktop;
 793
 794     /* make a copy of the list cuz we're changing it */
 795     stacking_copy = g_list_copy(stacking_list);
 796     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 797         if (WINDOW_IS_CLIENT(it->data)) {
 798             ObClient *c = it->data;
 799             guint d = c->desktop;
 800             if (d != DESKTOP_ALL && d >= movedesktop &&
 801                 /* don't move direct children, they'll be moved with their
 802                    parent - which will have to be on the same desktop */
 803                 !client_direct_parent(c))
 804             {
 805                 ob_debug("moving window %s", c->title);
 806                 client_set_desktop(c, c->desktop - 1, TRUE, TRUE);
 807             }
 808             /* raise all the windows that are on the current desktop which
 809                is being merged */
 810             if ((screen_desktop == rmdesktop - 1 ||
 811                  screen_desktop == rmdesktop) &&
 812                 (d == DESKTOP_ALL || d == screen_desktop))
 813             {
 814                 stacking_raise(CLIENT_AS_WINDOW(c));
 815                 ob_debug("raising window %s", c->title);
 816             }
 817         }
 818     }
 819     g_list_free(stacking_copy);
 820
 821     /* fallback focus like we're changing desktops */
 822     if (screen_desktop < screen_num_desktops - 1) {
 823         screen_fallback_focus();
 824         ob_debug("fake desktop change");
 825     }
 826
 827     screen_set_num_desktops(screen_num_desktops-1);
 828
 829     event_end_ignore_all_enters(ignore_start);
 830 }
 831
 832 static void get_row_col(guint d, guint *r, guint *c)
 833 {
 834     switch (screen_desktop_layout.orientation) {
 835     case OB_ORIENTATION_HORZ:
 836         switch (screen_desktop_layout.start_corner) {
 837         case OB_CORNER_TOPLEFT:
 838             *r = d / screen_desktop_layout.columns;
 839             *c = d % screen_desktop_layout.columns;
 840             break;
 841         case OB_CORNER_BOTTOMLEFT:
 842             *r = screen_desktop_layout.rows - 1 -
 843                 d / screen_desktop_layout.columns;
 844             *c = d % screen_desktop_layout.columns;
 845             break;
 846         case OB_CORNER_TOPRIGHT:
 847             *r = d / screen_desktop_layout.columns;
 848             *c = screen_desktop_layout.columns - 1 -
 849                 d % screen_desktop_layout.columns;
 850             break;
 851         case OB_CORNER_BOTTOMRIGHT:
 852             *r = screen_desktop_layout.rows - 1 -
 853                 d / screen_desktop_layout.columns;
 854             *c = screen_desktop_layout.columns - 1 -
 855                 d % screen_desktop_layout.columns;
 856             break;
 857         }
 858         break;
 859     case OB_ORIENTATION_VERT:
 860         switch (screen_desktop_layout.start_corner) {
 861         case OB_CORNER_TOPLEFT:
 862             *r = d % screen_desktop_layout.rows;
 863             *c = d / screen_desktop_layout.rows;
 864             break;
 865         case OB_CORNER_BOTTOMLEFT:
 866             *r = screen_desktop_layout.rows - 1 -
 867                 d % screen_desktop_layout.rows;
 868             *c = d / screen_desktop_layout.rows;
 869             break;
 870         case OB_CORNER_TOPRIGHT:
 871             *r = d % screen_desktop_layout.rows;
 872             *c = screen_desktop_layout.columns - 1 -
 873                 d / screen_desktop_layout.rows;
 874             break;
 875         case OB_CORNER_BOTTOMRIGHT:
 876             *r = screen_desktop_layout.rows - 1 -
 877                 d % screen_desktop_layout.rows;
 878             *c = screen_desktop_layout.columns - 1 -
 879                 d / screen_desktop_layout.rows;
 880             break;
 881         }
 882         break;
 883     }
 884 }
 885
 886 static guint translate_row_col(guint r, guint c)
 887 {
 888     switch (screen_desktop_layout.orientation) {
 889     case OB_ORIENTATION_HORZ:
 890         switch (screen_desktop_layout.start_corner) {
 891         case OB_CORNER_TOPLEFT:
 892             return r % screen_desktop_layout.rows *
 893                 screen_desktop_layout.columns +
 894                 c % screen_desktop_layout.columns;
 895         case OB_CORNER_BOTTOMLEFT:
 896             return (screen_desktop_layout.rows - 1 -
 897                     r % screen_desktop_layout.rows) *
 898                 screen_desktop_layout.columns +
 899                 c % screen_desktop_layout.columns;
 900         case OB_CORNER_TOPRIGHT:
 901             return r % screen_desktop_layout.rows *
 902                 screen_desktop_layout.columns +
 903                 (screen_desktop_layout.columns - 1 -
 904                  c % screen_desktop_layout.columns);
 905         case OB_CORNER_BOTTOMRIGHT:
 906             return (screen_desktop_layout.rows - 1 -
 907                     r % screen_desktop_layout.rows) *
 908                 screen_desktop_layout.columns +
 909                 (screen_desktop_layout.columns - 1 -
 910                  c % screen_desktop_layout.columns);
 911         }
 912     case OB_ORIENTATION_VERT:
 913         switch (screen_desktop_layout.start_corner) {
 914         case OB_CORNER_TOPLEFT:
 915             return c % screen_desktop_layout.columns *
 916                 screen_desktop_layout.rows +
 917                 r % screen_desktop_layout.rows;
 918         case OB_CORNER_BOTTOMLEFT:
 919             return c % screen_desktop_layout.columns *
 920                 screen_desktop_layout.rows +
 921                 (screen_desktop_layout.rows - 1 -
 922                  r % screen_desktop_layout.rows);
 923         case OB_CORNER_TOPRIGHT:
 924             return (screen_desktop_layout.columns - 1 -
 925                     c % screen_desktop_layout.columns) *
 926                 screen_desktop_layout.rows +
 927                 r % screen_desktop_layout.rows;
 928         case OB_CORNER_BOTTOMRIGHT:
 929             return (screen_desktop_layout.columns - 1 -
 930                     c % screen_desktop_layout.columns) *
 931                 screen_desktop_layout.rows +
 932                 (screen_desktop_layout.rows - 1 -
 933                  r % screen_desktop_layout.rows);
 934         }
 935     }
 936     g_assert_not_reached();
 937     return 0;
 938 }
 939
 940 static gboolean hide_desktop_popup_func(gpointer data)
 941 {
 942     pager_popup_hide(desktop_popup);
 943     desktop_popup_timer = 0;
 944     XFlush(obt_display);
 945     return FALSE; /* don't repeat */
 946 }
 947
 948 void screen_show_desktop_popup(guint d, gboolean perm)
 949 {
 950     const Rect *a;
 951
 952     /* 0 means don't show the popup */
 953     if (!config_desktop_popup_time) return;
 954
 955     a = screen_physical_area_primary(FALSE);
 956     pager_popup_position(desktop_popup, CenterGravity,
 957                          a->x + a->width / 2, a->y + a->height / 2);
 958     pager_popup_icon_size_multiplier(desktop_popup,
 959                                      (screen_desktop_layout.columns /
 960                                       screen_desktop_layout.rows) / 2,
 961                                      (screen_desktop_layout.rows/
 962                                       screen_desktop_layout.columns) / 2);
 963     pager_popup_max_width(desktop_popup,
 964                           MAX(a->width/3, POPUP_WIDTH));
 965     pager_popup_show(desktop_popup, screen_desktop_names[d], d);
 966
 967     if (desktop_popup_timer) g_source_remove(desktop_popup_timer);
 968     desktop_popup_timer = 0;
 969     if (!perm && !desktop_popup_perm)
 970         /* only hide if its not already being show permanently */
 971         desktop_popup_timer = g_timeout_add(config_desktop_popup_time,
 972                                             hide_desktop_popup_func,
 973                                             desktop_popup);
 974     if (perm)
 975         desktop_popup_perm = TRUE;
 976 }
 977
 978 void screen_hide_desktop_popup(void)
 979 {
 980     if (desktop_popup_timer) g_source_remove(desktop_popup_timer);
 981     desktop_popup_timer = 0;
 982     pager_popup_hide(desktop_popup);
 983     desktop_popup_perm = FALSE;
 984 }
 985
 986 guint screen_find_desktop(guint from, ObDirection dir,
 987                           gboolean wrap, gboolean linear)
 988 {
 989     guint r, c;
 990     guint d;
 991
 992     d = from;
 993     get_row_col(d, &r, &c);
 994     if (linear) {
 995         switch (dir) {
 996         case OB_DIRECTION_EAST:
 997             if (d < screen_num_desktops - 1)
 998                 ++d;
 999             else if (wrap)
1000                 d = 0;
1001             else
1002                 return from;
1003             break;
1004         case OB_DIRECTION_WEST:
1005             if (d > 0)
1006                 --d;
1007             else if (wrap)
1008                 d = screen_num_desktops - 1;
1009             else
1010                 return from;
1011             break;
1012         default:
1013             g_assert_not_reached();
1014             return from;
1015         }
1016     } else {
1017         switch (dir) {
1018         case OB_DIRECTION_EAST:
1019             ++c;
1020             if (c >= screen_desktop_layout.columns) {
1021                 if (wrap)
1022                     c = 0;
1023                 else
1024                     return from;
1025             }
1026             d = translate_row_col(r, c);
1027             if (d >= screen_num_desktops) {
1028                 if (wrap)
1029                     ++c;
1030                 else
1031                     return from;
1032             }
1033             break;
1034         case OB_DIRECTION_WEST:
1035             --c;
1036             if (c >= screen_desktop_layout.columns) {
1037                 if (wrap)
1038                     c = screen_desktop_layout.columns - 1;
1039                 else
1040                     return from;
1041             }
1042             d = translate_row_col(r, c);
1043             if (d >= screen_num_desktops) {
1044                 if (wrap)
1045                     --c;
1046                 else
1047                     return from;
1048             }
1049             break;
1050         case OB_DIRECTION_SOUTH:
1051             ++r;
1052             if (r >= screen_desktop_layout.rows) {
1053                 if (wrap)
1054                     r = 0;
1055                 else
1056                     return from;
1057             }
1058             d = translate_row_col(r, c);
1059             if (d >= screen_num_desktops) {
1060                 if (wrap)
1061                     ++r;
1062                 else
1063                     return from;
1064             }
1065             break;
1066         case OB_DIRECTION_NORTH:
1067             --r;
1068             if (r >= screen_desktop_layout.rows) {
1069                 if (wrap)
1070                     r = screen_desktop_layout.rows - 1;
1071                 else
1072                     return from;
1073             }
1074             d = translate_row_col(r, c);
1075             if (d >= screen_num_desktops) {
1076                 if (wrap)
1077                     --r;
1078                 else
1079                     return from;
1080             }
1081             break;
1082         default:
1083             g_assert_not_reached();
1084             return from;
1085         }
1086
1087         d = translate_row_col(r, c);
1088     }
1089     return d;
1090 }
1091
1092 static gboolean screen_validate_layout(ObDesktopLayout *l)
1093 {
1094     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
1095         return FALSE;
1096
1097     /* fill in a zero rows/columns */
1098     if (l->columns == 0) {
1099         l->columns = screen_num_desktops / l->rows;
1100         if (l->rows * l->columns < screen_num_desktops)
1101             l->columns++;
1102         if (l->rows * l->columns >= screen_num_desktops + l->columns)
1103             l->rows--;
1104     } else if (l->rows == 0) {
1105         l->rows = screen_num_desktops / l->columns;
1106         if (l->columns * l->rows < screen_num_desktops)
1107             l->rows++;
1108         if (l->columns * l->rows >= screen_num_desktops + l->rows)
1109             l->columns--;
1110     }
1111
1112     /* bounds checking */
1113     if (l->orientation == OB_ORIENTATION_HORZ) {
1114         l->columns = MIN(screen_num_desktops, l->columns);
1115         l->rows = MIN(l->rows,
1116                       (screen_num_desktops + l->columns - 1) / l->columns);
1117         l->columns = screen_num_desktops / l->rows +
1118             !!(screen_num_desktops % l->rows);
1119     } else {
1120         l->rows = MIN(screen_num_desktops, l->rows);
1121         l->columns = MIN(l->columns,
1122                          (screen_num_desktops + l->rows - 1) / l->rows);
1123         l->rows = screen_num_desktops / l->columns +
1124             !!(screen_num_desktops % l->columns);
1125     }
1126     return TRUE;
1127 }
1128
1129 void screen_update_layout(void)
1130
1131 {
1132     ObDesktopLayout l;
1133     guint32 *data;
1134     guint num;
1135
1136     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
1137     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
1138     screen_desktop_layout.rows = 1;
1139     screen_desktop_layout.columns = screen_num_desktops;
1140
1141     if (OBT_PROP_GETA32(obt_root(ob_screen),
1142                         NET_DESKTOP_LAYOUT, CARDINAL, &data, &num)) {
1143         if (num == 3 || num == 4) {
1144
1145             if (data[0] == OBT_PROP_ATOM(NET_WM_ORIENTATION_VERT))
1146                 l.orientation = OB_ORIENTATION_VERT;
1147             else if (data[0] == OBT_PROP_ATOM(NET_WM_ORIENTATION_HORZ))
1148                 l.orientation = OB_ORIENTATION_HORZ;
1149             else
1150                 return;
1151
1152             if (num < 4)
1153                 l.start_corner = OB_CORNER_TOPLEFT;
1154             else {
1155                 if (data[3] == OBT_PROP_ATOM(NET_WM_TOPLEFT))
1156                     l.start_corner = OB_CORNER_TOPLEFT;
1157                 else if (data[3] == OBT_PROP_ATOM(NET_WM_TOPRIGHT))
1158                     l.start_corner = OB_CORNER_TOPRIGHT;
1159                 else if (data[3] == OBT_PROP_ATOM(NET_WM_BOTTOMRIGHT))
1160                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
1161                 else if (data[3] == OBT_PROP_ATOM(NET_WM_BOTTOMLEFT))
1162                     l.start_corner = OB_CORNER_BOTTOMLEFT;
1163                 else
1164                     return;
1165             }
1166
1167             l.columns = data[1];
1168             l.rows = data[2];
1169
1170             if (screen_validate_layout(&l))
1171                 screen_desktop_layout = l;
1172
1173             g_free(data);
1174         }
1175     }
1176 }
1177
1178 void screen_update_desktop_names(void)
1179 {
1180     guint i;
1181
1182     /* empty the array */
1183     g_strfreev(screen_desktop_names);
1184     screen_desktop_names = NULL;
1185
1186     if (OBT_PROP_GETSS(obt_root(ob_screen),
1187                        NET_DESKTOP_NAMES, utf8, &screen_desktop_names))
1188         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
1189     else
1190         i = 0;
1191     if (i < screen_num_desktops) {
1192         GSList *it;
1193
1194         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
1195                                        screen_num_desktops + 1);
1196         screen_desktop_names[screen_num_desktops] = NULL;
1197
1198         it = g_slist_nth(config_desktops_names, i);
1199
1200         for (; i < screen_num_desktops; ++i) {
1201             if (it && ((char*)it->data)[0]) /* not empty */
1202                 /* use the names from the config file when possible */
1203                 screen_desktop_names[i] = g_strdup(it->data);
1204             else
1205                 /* make up a nice name if it's not though */
1206                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
1207                                                           i + 1);
1208             if (it) it = g_slist_next(it);
1209         }
1210
1211         /* if we changed any names, then set the root property so we can
1212            all agree on the names */
1213         OBT_PROP_SETSS(obt_root(ob_screen), NET_DESKTOP_NAMES,
1214                        utf8, (const gchar*const*)screen_desktop_names);
1215     }
1216
1217     /* resize the pager for these names */
1218     pager_popup_text_width_to_strings(desktop_popup,
1219                                       screen_desktop_names,
1220                                       screen_num_desktops);
1221 }
1222
1223 void screen_show_desktop(gboolean show, ObClient *show_only)
1224 {
1225     GList *it;
1226
1227     if (show == screen_showing_desktop) return; /* no change */
1228
1229     screen_showing_desktop = show;
1230
1231     if (show) {
1232         /* hide windows bottom to top */
1233         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1234             if (WINDOW_IS_CLIENT(it->data)) {
1235                 ObClient *client = it->data;
1236                 client_showhide(client);
1237             }
1238         }
1239     }
1240     else {
1241         /* restore windows top to bottom */
1242         for (it = stacking_list; it; it = g_list_next(it)) {
1243             if (WINDOW_IS_CLIENT(it->data)) {
1244                 ObClient *client = it->data;
1245                 if (client_should_show(client)) {
1246                     if (!show_only || client == show_only)
1247                         client_show(client);
1248                     else
1249                         client_iconify(client, TRUE, FALSE, TRUE);
1250                 }
1251             }
1252         }
1253     }
1254
1255     if (show) {
1256         /* focus the desktop */
1257         for (it = focus_order; it; it = g_list_next(it)) {
1258             ObClient *c = it->data;
1259             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1260                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1261                 client_focus(it->data))
1262                 break;
1263         }
1264     }
1265     else if (!show_only) {
1266         ObClient *c;
1267
1268         if ((c = focus_fallback(TRUE, FALSE, TRUE, FALSE))) {
1269             /* only do the flicker reducing stuff ahead of time if we are going
1270                to call xsetinputfocus on the window ourselves. otherwise there
1271                is no guarantee the window will actually take focus.. */
1272             if (c->can_focus) {
1273                 /* reduce flicker by hiliting now rather than waiting for the
1274                    server FocusIn event */
1275                 frame_adjust_focus(c->frame, TRUE);
1276             }
1277         }
1278     }
1279
1280     show = !!show; /* make it boolean */
1281     OBT_PROP_SET32(obt_root(ob_screen), NET_SHOWING_DESKTOP, CARDINAL, show);
1282 }
1283
1284 void screen_install_colormap(ObClient *client, gboolean install)
1285 {
1286     if (client == NULL || client->colormap == None) {
1287         if (install)
1288             XInstallColormap(obt_display, RrColormap(ob_rr_inst));
1289         else
1290             XUninstallColormap(obt_display, RrColormap(ob_rr_inst));
1291     } else {
1292         obt_display_ignore_errors(TRUE);
1293         if (install)
1294             XInstallColormap(obt_display, client->colormap);
1295         else
1296             XUninstallColormap(obt_display, client->colormap);
1297         obt_display_ignore_errors(FALSE);
1298     }
1299 }
1300
1301 typedef struct {
1302     guint desktop;
1303     StrutPartial *strut;
1304 } ObScreenStrut;
1305
1306 #define RESET_STRUT_LIST(sl) \
1307     while (sl) { \
1308         g_slice_free(ObScreenStrut, (sl)->data); \
1309         sl = g_slist_delete_link(sl, sl); \
1310     }
1311
1312 #define ADD_STRUT_TO_LIST(sl, d, s) \
1313 { \
1314     ObScreenStrut *ss = g_slice_new(ObScreenStrut); \
1315     ss->desktop = d; \
1316     ss->strut = s;  \
1317     sl = g_slist_prepend(sl, ss); \
1318 }
1319
1320 #define VALIDATE_STRUTS(sl, side, max) \
1321 { \
1322     GSList *it; \
1323     for (it = sl; it; it = g_slist_next(it)) { \
1324       ObScreenStrut *ss = it->data; \
1325       ss->strut->side = MIN(max, ss->strut->side); \
1326     } \
1327 }
1328
1329 static void get_xinerama_screens(Rect **xin_areas, guint *nxin)
1330 {
1331     guint i;
1332     gint n, l, r, t, b;
1333 #ifdef XINERAMA
1334     XineramaScreenInfo *info;
1335 #endif
1336
1337     if (ob_debug_xinerama) {
1338         gint w = WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen));
1339         gint h = HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen));
1340         *nxin = 2;
1341         *xin_areas = g_new(Rect, *nxin + 1);
1342         RECT_SET((*xin_areas)[0], 0, 0, w/2, h);
1343         RECT_SET((*xin_areas)[1], w/2, 0, w-(w/2), h);
1344     }
1345 #ifdef XINERAMA
1346     else if (obt_display_extension_xinerama &&
1347              (info = XineramaQueryScreens(obt_display, &n))) {
1348         *nxin = n;
1349         *xin_areas = g_new(Rect, *nxin + 1);
1350         for (i = 0; i < *nxin; ++i)
1351             RECT_SET((*xin_areas)[i], info[i].x_org, info[i].y_org,
1352                      info[i].width, info[i].height);
1353         XFree(info);
1354     }
1355 #endif
1356     else {
1357         *nxin = 1;
1358         *xin_areas = g_new(Rect, *nxin + 1);
1359         RECT_SET((*xin_areas)[0], 0, 0,
1360                  WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen)),
1361                  HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen)));
1362     }
1363
1364     /* returns one extra with the total area in it */
1365     l = (*xin_areas)[0].x;
1366     t = (*xin_areas)[0].y;
1367     r = (*xin_areas)[0].x + (*xin_areas)[0].width - 1;
1368     b = (*xin_areas)[0].y + (*xin_areas)[0].height - 1;
1369     for (i = 1; i < *nxin; ++i) {
1370         l = MIN(l, (*xin_areas)[i].x);
1371         t = MIN(l, (*xin_areas)[i].y);
1372         r = MAX(r, (*xin_areas)[i].x + (*xin_areas)[i].width - 1);
1373         b = MAX(b, (*xin_areas)[i].y + (*xin_areas)[i].height - 1);
1374     }
1375     RECT_SET((*xin_areas)[*nxin], l, t, r - l + 1, b - t + 1);
1376 }
1377
1378 void screen_update_areas(void)
1379 {
1380     guint i;
1381     gulong *dims;
1382     GList *it, *onscreen;
1383
1384     /* collect the clients that are on screen */
1385     onscreen = NULL;
1386     for (it = client_list; it; it = g_list_next(it)) {
1387         if (client_monitor(it->data) != screen_num_monitors)
1388             onscreen = g_list_prepend(onscreen, it->data);
1389     }
1390
1391     g_free(monitor_area);
1392     get_xinerama_screens(&monitor_area, &screen_num_monitors);
1393
1394     /* set up the user-specified margins */
1395     config_margins.top_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1396     config_margins.top_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1397     config_margins.bottom_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1398     config_margins.bottom_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1399     config_margins.left_start = RECT_TOP(monitor_area[screen_num_monitors]);
1400     config_margins.left_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1401     config_margins.right_start = RECT_TOP(monitor_area[screen_num_monitors]);
1402     config_margins.right_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1403
1404     RESET_STRUT_LIST(struts_left);
1405     RESET_STRUT_LIST(struts_top);
1406     RESET_STRUT_LIST(struts_right);
1407     RESET_STRUT_LIST(struts_bottom);
1408
1409     /* collect the struts */
1410     for (it = client_list; it; it = g_list_next(it)) {
1411         ObClient *c = it->data;
1412         if (c->strut.left)
1413             ADD_STRUT_TO_LIST(struts_left, c->desktop, &c->strut);
1414         if (c->strut.top)
1415             ADD_STRUT_TO_LIST(struts_top, c->desktop, &c->strut);
1416         if (c->strut.right)
1417             ADD_STRUT_TO_LIST(struts_right, c->desktop, &c->strut);
1418         if (c->strut.bottom)
1419             ADD_STRUT_TO_LIST(struts_bottom, c->desktop, &c->strut);
1420     }
1421     if (dock_strut.left)
1422         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &dock_strut);
1423     if (dock_strut.top)
1424         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &dock_strut);
1425     if (dock_strut.right)
1426         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &dock_strut);
1427     if (dock_strut.bottom)
1428         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &dock_strut);
1429
1430     if (config_margins.left)
1431         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &config_margins);
1432     if (config_margins.top)
1433         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &config_margins);
1434     if (config_margins.right)
1435         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &config_margins);
1436     if (config_margins.bottom)
1437         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &config_margins);
1438
1439     VALIDATE_STRUTS(struts_left, left,
1440                     monitor_area[screen_num_monitors].width / 2);
1441     VALIDATE_STRUTS(struts_right, right,
1442                     monitor_area[screen_num_monitors].width / 2);
1443     VALIDATE_STRUTS(struts_top, top,
1444                     monitor_area[screen_num_monitors].height / 2);
1445     VALIDATE_STRUTS(struts_bottom, bottom,
1446                     monitor_area[screen_num_monitors].height / 2);
1447
1448     dims = g_new(gulong, 4 * screen_num_desktops);
1449     for (i = 0; i < screen_num_desktops; ++i) {
1450         Rect *area = screen_area(i, SCREEN_AREA_ALL_MONITORS, NULL);
1451         dims[i*4+0] = area->x;
1452         dims[i*4+1] = area->y;
1453         dims[i*4+2] = area->width;
1454         dims[i*4+3] = area->height;
1455         g_slice_free(Rect, area);
1456     }
1457
1458     /* set the legacy workarea hint to the union of all the monitors */
1459     OBT_PROP_SETA32(obt_root(ob_screen), NET_WORKAREA, CARDINAL,
1460                     dims, 4 * screen_num_desktops);
1461
1462     /* the area has changed, adjust all the windows if they need it */
1463     for (it = onscreen; it; it = g_list_next(it)) {
1464         client_move_onscreen(it->data, FALSE);
1465         client_reconfigure(it->data, FALSE);
1466     }
1467
1468     g_free(dims);
1469 }
1470
1471 #if 0
1472 Rect* screen_area_all_monitors(guint desktop)
1473 {
1474     guint i;
1475     Rect *a;
1476
1477     a = screen_area_monitor(desktop, 0);
1478
1479     /* combine all the monitors together */
1480     for (i = 1; i < screen_num_monitors; ++i) {
1481         Rect *m = screen_area_monitor(desktop, i);
1482         gint l, r, t, b;
1483
1484         l = MIN(RECT_LEFT(*a), RECT_LEFT(*m));
1485         t = MIN(RECT_TOP(*a), RECT_TOP(*m));
1486         r = MAX(RECT_RIGHT(*a), RECT_RIGHT(*m));
1487         b = MAX(RECT_BOTTOM(*a), RECT_BOTTOM(*m));
1488
1489         RECT_SET(*a, l, t, r - l + 1, b - t + 1);
1490
1491         g_free(m);
1492     }
1493
1494     return a;
1495 }
1496 #endif
1497
1498 #define STRUT_LEFT_IN_SEARCH(s, search) \
1499     (RANGES_INTERSECT(search->y, search->height, \
1500                       s->left_start, s->left_end - s->left_start + 1))
1501 #define STRUT_RIGHT_IN_SEARCH(s, search) \
1502     (RANGES_INTERSECT(search->y, search->height, \
1503                       s->right_start, s->right_end - s->right_start + 1))
1504 #define STRUT_TOP_IN_SEARCH(s, search) \
1505     (RANGES_INTERSECT(search->x, search->width, \
1506                       s->top_start, s->top_end - s->top_start + 1))
1507 #define STRUT_BOTTOM_IN_SEARCH(s, search) \
1508     (RANGES_INTERSECT(search->x, search->width, \
1509                       s->bottom_start, s->bottom_end - s->bottom_start + 1))
1510
1511 #define STRUT_LEFT_IGNORE(s, us, search) \
1512     (head == SCREEN_AREA_ALL_MONITORS && us && \
1513      RECT_LEFT(monitor_area[i]) + s->left > RECT_LEFT(*search))
1514 #define STRUT_RIGHT_IGNORE(s, us, search) \
1515     (head == SCREEN_AREA_ALL_MONITORS && us && \
1516      RECT_RIGHT(monitor_area[i]) - s->right < RECT_RIGHT(*search))
1517 #define STRUT_TOP_IGNORE(s, us, search) \
1518     (head == SCREEN_AREA_ALL_MONITORS && us && \
1519      RECT_TOP(monitor_area[i]) + s->top > RECT_TOP(*search))
1520 #define STRUT_BOTTOM_IGNORE(s, us, search) \
1521     (head == SCREEN_AREA_ALL_MONITORS && us && \
1522      RECT_BOTTOM(monitor_area[i]) - s->bottom < RECT_BOTTOM(*search))
1523
1524 Rect* screen_area(guint desktop, guint head, Rect *search)
1525 {
1526     Rect *a;
1527     GSList *it;
1528     gint l, r, t, b;
1529     guint i, d;
1530     gboolean us = search != NULL; /* user provided search */
1531
1532     g_assert(desktop < screen_num_desktops || desktop == DESKTOP_ALL);
1533     g_assert(head < screen_num_monitors || head == SCREEN_AREA_ONE_MONITOR ||
1534              head == SCREEN_AREA_ALL_MONITORS);
1535     g_assert(!(head == SCREEN_AREA_ONE_MONITOR && search == NULL));
1536
1537     /* find any struts for this monitor
1538        which will be affecting the search area.
1539     */
1540
1541     /* search everything if search is null */
1542     if (!search) {
1543         if (head < screen_num_monitors) search = &monitor_area[head];
1544         else search = &monitor_area[screen_num_monitors];
1545     }
1546     if (head == SCREEN_AREA_ONE_MONITOR) head = screen_find_monitor(search);
1547
1548     /* al is "all left" meaning the furthest left you can get, l is our
1549        "working left" meaning our current strut edge which we're calculating
1550     */
1551
1552     /* only include monitors which the search area lines up with */
1553     if (RECT_INTERSECTS_RECT(monitor_area[screen_num_monitors], *search)) {
1554         l = RECT_RIGHT(monitor_area[screen_num_monitors]);
1555         t = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1556         r = RECT_LEFT(monitor_area[screen_num_monitors]);
1557         b = RECT_TOP(monitor_area[screen_num_monitors]);
1558         for (i = 0; i < screen_num_monitors; ++i) {
1559             /* add the monitor if applicable */
1560             if (RANGES_INTERSECT(search->x, search->width,
1561                                  monitor_area[i].x, monitor_area[i].width))
1562             {
1563                 t = MIN(t, RECT_TOP(monitor_area[i]));
1564                 b = MAX(b, RECT_BOTTOM(monitor_area[i]));
1565             }
1566             if (RANGES_INTERSECT(search->y, search->height,
1567                                  monitor_area[i].y, monitor_area[i].height))
1568             {
1569                 l = MIN(l, RECT_LEFT(monitor_area[i]));
1570                 r = MAX(r, RECT_RIGHT(monitor_area[i]));
1571             }
1572         }
1573     } else {
1574         l = RECT_LEFT(monitor_area[screen_num_monitors]);
1575         t = RECT_TOP(monitor_area[screen_num_monitors]);
1576         r = RECT_RIGHT(monitor_area[screen_num_monitors]);
1577         b = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1578     }
1579
1580     for (d = 0; d < screen_num_desktops; ++d) {
1581         if (d != desktop && desktop != DESKTOP_ALL) continue;
1582
1583         for (i = 0; i < screen_num_monitors; ++i) {
1584             if (head != SCREEN_AREA_ALL_MONITORS && head != i) continue;
1585
1586             for (it = struts_left; it; it = g_slist_next(it)) {
1587                 ObScreenStrut *s = it->data;
1588                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1589                     STRUT_LEFT_IN_SEARCH(s->strut, search) &&
1590                     !STRUT_LEFT_IGNORE(s->strut, us, search))
1591                     l = MAX(l, RECT_LEFT(monitor_area[screen_num_monitors])
1592                                + s->strut->left);
1593             }
1594             for (it = struts_top; it; it = g_slist_next(it)) {
1595                 ObScreenStrut *s = it->data;
1596                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1597                     STRUT_TOP_IN_SEARCH(s->strut, search) &&
1598                     !STRUT_TOP_IGNORE(s->strut, us, search))
1599                     t = MAX(t, RECT_TOP(monitor_area[screen_num_monitors])
1600                                + s->strut->top);
1601             }
1602             for (it = struts_right; it; it = g_slist_next(it)) {
1603                 ObScreenStrut *s = it->data;
1604                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1605                     STRUT_RIGHT_IN_SEARCH(s->strut, search) &&
1606                     !STRUT_RIGHT_IGNORE(s->strut, us, search))
1607                     r = MIN(r, RECT_RIGHT(monitor_area[screen_num_monitors])
1608                                - s->strut->right);
1609             }
1610             for (it = struts_bottom; it; it = g_slist_next(it)) {
1611                 ObScreenStrut *s = it->data;
1612                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1613                     STRUT_BOTTOM_IN_SEARCH(s->strut, search) &&
1614                     !STRUT_BOTTOM_IGNORE(s->strut, us, search))
1615                     b = MIN(b, RECT_BOTTOM(monitor_area[screen_num_monitors])
1616                                - s->strut->bottom);
1617             }
1618
1619             /* limit to this monitor */
1620             if (head == i) {
1621                 l = MAX(l, RECT_LEFT(monitor_area[i]));
1622                 t = MAX(t, RECT_TOP(monitor_area[i]));
1623                 r = MIN(r, RECT_RIGHT(monitor_area[i]));
1624                 b = MIN(b, RECT_BOTTOM(monitor_area[i]));
1625             }
1626         }
1627     }
1628
1629     a = g_slice_new(Rect);
1630     a->x = l;
1631     a->y = t;
1632     a->width = r - l + 1;
1633     a->height = b - t + 1;
1634     return a;
1635 }
1636
1637 guint screen_find_monitor(const Rect *search)
1638 {
1639     guint i;
1640     guint most = screen_num_monitors;
1641     guint mostv = 0;
1642
1643     for (i = 0; i < screen_num_monitors; ++i) {
1644         const Rect *area = screen_physical_area_monitor(i);
1645         if (RECT_INTERSECTS_RECT(*area, *search)) {
1646             Rect r;
1647             guint v;
1648
1649             RECT_SET_INTERSECTION(r, *area, *search);
1650             v = r.width * r.height;
1651
1652             if (v > mostv) {
1653                 mostv = v;
1654                 most = i;
1655             }
1656         }
1657     }
1658     return most;
1659 }
1660
1661 const Rect* screen_physical_area_all_monitors(void)
1662 {
1663     return screen_physical_area_monitor(screen_num_monitors);
1664 }
1665
1666 const Rect* screen_physical_area_monitor(guint head)
1667 {
1668     g_assert(head <= screen_num_monitors);
1669
1670     return &monitor_area[head];
1671 }
1672
1673 gboolean screen_physical_area_monitor_contains(guint head, Rect *search)
1674 {
1675     g_assert(head <= screen_num_monitors);
1676     g_assert(search);
1677     return RECT_INTERSECTS_RECT(monitor_area[head], *search);
1678 }
1679
1680 guint screen_monitor_active(void)
1681 {
1682     if (moveresize_client)
1683         return client_monitor(moveresize_client);
1684     else if (focus_client)
1685         return client_monitor(focus_client);
1686     else
1687         return screen_monitor_pointer();
1688 }
1689
1690 const Rect* screen_physical_area_active(void)
1691 {
1692     return screen_physical_area_monitor(screen_monitor_active());
1693 }
1694
1695 guint screen_monitor_primary(gboolean fixed)
1696 {
1697     if (config_primary_monitor_index > 0) {
1698         if (config_primary_monitor_index-1 < screen_num_monitors)
1699             return config_primary_monitor_index - 1;
1700         else
1701             return 0;
1702     }
1703     else if (fixed)
1704         return 0;
1705     else if (config_primary_monitor == OB_PLACE_MONITOR_ACTIVE)
1706         return screen_monitor_active();
1707     else /* config_primary_monitor == OB_PLACE_MONITOR_MOUSE */
1708         return screen_monitor_pointer();
1709 }
1710
1711 const Rect* screen_physical_area_primary(gboolean fixed)
1712 {
1713     return screen_physical_area_monitor(screen_monitor_primary(fixed));
1714 }
1715
1716 void screen_set_root_cursor(void)
1717 {
1718     if (sn_app_starting())
1719         XDefineCursor(obt_display, obt_root(ob_screen),
1720                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1721     else
1722         XDefineCursor(obt_display, obt_root(ob_screen),
1723                       ob_cursor(OB_CURSOR_POINTER));
1724 }
1725
1726 guint screen_find_monitor_point(guint x, guint y)
1727 {
1728     Rect mon;
1729     RECT_SET(mon, x, y, 1, 1);
1730     return screen_find_monitor(&mon);
1731 }
1732
1733 guint screen_monitor_pointer()
1734 {
1735     gint x, y;
1736     if (!screen_pointer_pos(&x, &y))
1737         x = y = 0;
1738     return screen_find_monitor_point(x, y);
1739 }
1740
1741 gboolean screen_pointer_pos(gint *x, gint *y)
1742 {
1743     Window w;
1744     gint i;
1745     guint u;
1746     gboolean ret;
1747
1748     ret = !!XQueryPointer(obt_display, obt_root(ob_screen),
1749                           &w, &w, x, y, &i, &i, &u);
1750     if (!ret) {
1751         for (i = 0; i < ScreenCount(obt_display); ++i)
1752             if (i != ob_screen)
1753                 if (XQueryPointer(obt_display, obt_root(i),
1754                                   &w, &w, x, y, &i, &i, &u))
1755                     break;
1756     }
1757     return ret;
1758 }