openbox/screen.c

   1 #include "openbox.h"
   2 #include "dock.h"
   3 #include "xerror.h"
   4 #include "prop.h"
   5 #include "startup.h"
   6 #include "timer.h"
   7 #include "config.h"
   8 #include "screen.h"
   9 #include "client.h"
  10 #include "frame.h"
  11 #include "focus.h"
  12 #include "dispatch.h"
  13 #include "extensions.h"
  14 #include "render/render.h"
  15
  16 #ifdef USE_LIBSN
  17 #  define SN_API_NOT_YET_FROZEN
  18 #  include <libsn/sn.h>
  19 #endif
  20
  21 #include <X11/Xlib.h>
  22 #ifdef HAVE_UNISTD_H
  23 #  include <sys/types.h>
  24 #  include <unistd.h>
  25 #endif
  26
  27 /*! The event mask to grab on the root window */
  28 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  29                         EnterWindowMask | LeaveWindowMask | \
  30                         SubstructureNotifyMask | SubstructureRedirectMask | \
  31                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  32
  33 guint    screen_num_desktops    = 0;
  34 guint    screen_desktop         = 0;
  35 Size     screen_physical_size;
  36 gboolean screen_showing_desktop;
  37 DesktopLayout screen_desktop_layout;
  38 char   **screen_desktop_names = NULL;
  39
  40 static Rect  *area = NULL;
  41 static Strut *strut = NULL;
  42 static Window support_window = None;
  43
  44 #ifdef USE_LIBSN
  45 static SnMonitorContext *sn_context;
  46 static int sn_busy_cnt;
  47 static Timer *sn_timer = NULL;
  48
  49 static void sn_event_func(SnMonitorEvent *event, void *data);
  50 #endif
  51
  52 static void screen_update_area();
  53 static void set_root_cursor();
  54
  55 static gboolean running;
  56 static int another_running(Display *d, XErrorEvent *e)
  57 {
  58     (void)d;(void)e;
  59     g_message("A window manager is already running on screen %d",
  60               ob_screen);
  61     running = TRUE;
  62     return -1;
  63 }
  64
  65 gboolean screen_annex()
  66 {
  67     XErrorHandler old;
  68     pid_t pid;
  69     int i, num_support;
  70     guint32 *supported;
  71
  72     running = FALSE;
  73     old = XSetErrorHandler(another_running);
  74     XSelectInput(ob_display, ob_root, ROOT_EVENTMASK);
  75     XSync(ob_display, FALSE);
  76     XSetErrorHandler(old);
  77     if (running)
  78         return FALSE;
  79
  80     g_message("Managing screen %d", ob_screen);
  81
  82     set_root_cursor();
  83
  84     /* set the OPENBOX_PID hint */
  85     pid = getpid();
  86     PROP_SET32(ob_root, openbox_pid, cardinal, pid);
  87
  88     /* create the netwm support window */
  89     support_window = XCreateSimpleWindow(ob_display, ob_root, 0,0,1,1,0,0,0);
  90
  91     /* set supporting window */
  92     PROP_SET32(ob_root, net_supporting_wm_check, window, support_window);
  93
  94     /* set properties on the supporting window */
  95     PROP_SETS(support_window, net_wm_name, "Openbox3");
  96     PROP_SET32(support_window, net_supporting_wm_check, window,support_window);
  97
  98     /* set the _NET_SUPPORTED_ATOMS hint */
  99     num_support = 61;
 100     i = 0;
 101     supported = g_new(guint32, num_support);
 102     supported[i++] = prop_atoms.net_current_desktop;
 103     supported[i++] = prop_atoms.net_number_of_desktops;
 104     supported[i++] = prop_atoms.net_desktop_geometry;
 105     supported[i++] = prop_atoms.net_desktop_viewport;
 106     supported[i++] = prop_atoms.net_active_window;
 107     supported[i++] = prop_atoms.net_workarea;
 108     supported[i++] = prop_atoms.net_client_list;
 109     supported[i++] = prop_atoms.net_client_list_stacking;
 110     supported[i++] = prop_atoms.net_desktop_names;
 111     supported[i++] = prop_atoms.net_close_window;
 112     supported[i++] = prop_atoms.net_desktop_layout;
 113     supported[i++] = prop_atoms.net_showing_desktop;
 114     supported[i++] = prop_atoms.net_wm_name;
 115     supported[i++] = prop_atoms.net_wm_visible_name;
 116     supported[i++] = prop_atoms.net_wm_icon_name;
 117     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 118     supported[i++] = prop_atoms.net_wm_desktop;
 119     supported[i++] = prop_atoms.net_wm_strut;
 120     supported[i++] = prop_atoms.net_wm_window_type;
 121     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 122     supported[i++] = prop_atoms.net_wm_window_type_dock;
 123     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 124     supported[i++] = prop_atoms.net_wm_window_type_menu;
 125     supported[i++] = prop_atoms.net_wm_window_type_utility;
 126     supported[i++] = prop_atoms.net_wm_window_type_splash;
 127     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 128     supported[i++] = prop_atoms.net_wm_window_type_normal;
 129     supported[i++] = prop_atoms.net_wm_allowed_actions;
 130     supported[i++] = prop_atoms.net_wm_action_move;
 131     supported[i++] = prop_atoms.net_wm_action_resize;
 132     supported[i++] = prop_atoms.net_wm_action_minimize;
 133     supported[i++] = prop_atoms.net_wm_action_shade;
 134     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 135     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 136     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 137     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 138     supported[i++] = prop_atoms.net_wm_action_close;
 139     supported[i++] = prop_atoms.net_wm_state;
 140     supported[i++] = prop_atoms.net_wm_state_modal;
 141     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 142     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 143     supported[i++] = prop_atoms.net_wm_state_shaded;
 144     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 145     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 146     supported[i++] = prop_atoms.net_wm_state_hidden;
 147     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 148     supported[i++] = prop_atoms.net_wm_state_above;
 149     supported[i++] = prop_atoms.net_wm_state_below;
 150     supported[i++] = prop_atoms.net_moveresize_window;
 151     supported[i++] = prop_atoms.net_wm_moveresize;
 152     supported[i++] = prop_atoms.net_wm_moveresize_size_topleft;
 153     supported[i++] = prop_atoms.net_wm_moveresize_size_top;
 154     supported[i++] = prop_atoms.net_wm_moveresize_size_topright;
 155     supported[i++] = prop_atoms.net_wm_moveresize_size_right;
 156     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomright;
 157     supported[i++] = prop_atoms.net_wm_moveresize_size_bottom;
 158     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomleft;
 159     supported[i++] = prop_atoms.net_wm_moveresize_size_left;
 160     supported[i++] = prop_atoms.net_wm_moveresize_move;
 161     supported[i++] = prop_atoms.net_wm_moveresize_size_keyboard;
 162     supported[i++] = prop_atoms.net_wm_moveresize_move_keyboard;
 163     g_assert(i == num_support);
 164 /*
 165   supported[] = prop_atoms.net_wm_action_stick;
 166 */
 167
 168     PROP_SETA32(ob_root, net_supported, atom, supported, num_support);
 169     g_free(supported);
 170
 171     return TRUE;
 172 }
 173
 174 void screen_startup()
 175 {
 176     GSList *it;
 177     guint i;
 178
 179     /* get the initial size */
 180     screen_resize(WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen)),
 181                   HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen)));
 182
 183     /* set the names */
 184     screen_desktop_names = g_new(char*,
 185                                  g_slist_length(config_desktops_names) + 1);
 186     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 187         screen_desktop_names[i] = it->data; /* dont strdup */
 188     screen_desktop_names[i] = NULL;
 189     PROP_SETSS(ob_root, net_desktop_names, screen_desktop_names);
 190     g_free(screen_desktop_names); /* dont free the individual strings */
 191     screen_desktop_names = NULL;
 192
 193     screen_num_desktops = 0;
 194     screen_set_num_desktops(config_desktops_num);
 195     if (startup_desktop >= screen_num_desktops)
 196         startup_desktop = 0;
 197     screen_desktop = startup_desktop;
 198     screen_set_desktop(startup_desktop);
 199
 200     /* don't start in showing-desktop mode */
 201     screen_showing_desktop = FALSE;
 202     PROP_SET32(ob_root, net_showing_desktop, cardinal, screen_showing_desktop);
 203
 204     screen_update_layout();
 205
 206 #ifdef USE_LIBSN
 207     sn_context = sn_monitor_context_new(ob_sn_display, ob_screen,
 208                                         sn_event_func, NULL, NULL);
 209     sn_busy_cnt = 0;
 210 #endif
 211 }
 212
 213 void screen_shutdown()
 214 {
 215     XSelectInput(ob_display, ob_root, NoEventMask);
 216
 217     PROP_ERASE(ob_root, openbox_pid); /* we're not running here no more! */
 218     PROP_ERASE(ob_root, net_supported); /* not without us */
 219     PROP_ERASE(ob_root, net_showing_desktop); /* don't keep this mode */
 220
 221     XDestroyWindow(ob_display, support_window);
 222
 223     g_strfreev(screen_desktop_names);
 224     g_free(strut);
 225     g_free(area);
 226 }
 227
 228 void screen_resize(int w, int h)
 229 {
 230     GList *it;
 231     guint32 geometry[2];
 232
 233     /* Set the _NET_DESKTOP_GEOMETRY hint */
 234     geometry[0] = w;
 235     geometry[1] = h;
 236     PROP_SETA32(ob_root, net_desktop_geometry, cardinal, geometry, 2);
 237     screen_physical_size.width = geometry[0];
 238     screen_physical_size.height = geometry[1];
 239
 240     if (ob_state == State_Starting)
 241         return;
 242
 243     dock_configure();
 244     screen_update_struts();
 245
 246     for (it = client_list; it; it = it->next)
 247         client_move_onscreen(it->data);
 248 }
 249
 250 void screen_set_num_desktops(guint num)
 251 {
 252     guint i, old;
 253     guint32 *viewport;
 254     GList *it;
 255
 256     g_assert(num > 0);
 257
 258     old = screen_num_desktops;
 259     screen_num_desktops = num;
 260     PROP_SET32(ob_root, net_number_of_desktops, cardinal, num);
 261
 262     /* set the viewport hint */
 263     viewport = g_new0(guint32, num * 2);
 264     PROP_SETA32(ob_root, net_desktop_viewport, cardinal, viewport, num * 2);
 265     g_free(viewport);
 266
 267     /* the number of rows/columns will differ */
 268     screen_update_layout();
 269
 270     /* may be some unnamed desktops that we need to fill in with names */
 271     screen_update_desktop_names();
 272
 273     /* update the focus lists */
 274     /* free our lists for the desktops which have disappeared */
 275     for (i = num; i < old; ++i)
 276         g_list_free(focus_order[i]);
 277     /* realloc the array */
 278     focus_order = g_renew(GList*, focus_order, num);
 279     /* set the new lists to be empty */
 280     for (i = old; i < num; ++i)
 281         focus_order[i] = NULL;
 282
 283     /* move windows on desktops that will no longer exist! */
 284     for (it = client_list; it != NULL; it = it->next) {
 285         Client *c = it->data;
 286         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 287             client_set_desktop(c, num - 1, FALSE);
 288     }
 289
 290     /* change our struts/area to match (after moving windows) */
 291     screen_update_struts();
 292
 293     dispatch_ob(Event_Ob_NumDesktops, num, old);
 294
 295     /* change our desktop if we're on one that no longer exists! */
 296     if (screen_desktop >= screen_num_desktops)
 297         screen_set_desktop(num - 1);
 298 }
 299
 300 void screen_set_desktop(guint num)
 301 {
 302     GList *it;
 303     guint old;
 304     XEvent e;
 305
 306     g_assert(num < screen_num_desktops);
 307
 308     old = screen_desktop;
 309     screen_desktop = num;
 310     PROP_SET32(ob_root, net_current_desktop, cardinal, num);
 311
 312     if (old == num) return;
 313
 314     g_message("Moving to desktop %d", num+1);
 315
 316     /* show windows before hiding the rest to lessen the enter/leave events */
 317
 318     /* show windows from top to bottom */
 319     for (it = stacking_list; it != NULL; it = it->next) {
 320         if (WINDOW_IS_CLIENT(it->data)) {
 321             Client *c = it->data;
 322             if (!c->frame->visible && client_should_show(c))
 323                 frame_show(c->frame);
 324         }
 325     }
 326
 327     /* hide windows from bottom to top */
 328     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 329         if (WINDOW_IS_CLIENT(it->data)) {
 330             Client *c = it->data;
 331             if (c->frame->visible && !client_should_show(c))
 332                 frame_hide(c->frame);
 333         }
 334     }
 335
 336     /* focus the last focused window on the desktop, and ignore enter events
 337        from the switch so it doesnt mess with the focus */
 338     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 339     g_message("switch fallback");
 340     focus_fallback(Fallback_Desktop);
 341     g_message("/switch fallback");
 342
 343     dispatch_ob(Event_Ob_Desktop, num, old);
 344 }
 345
 346 void screen_update_layout()
 347 {
 348     guint32 *data = NULL;
 349     guint num;
 350
 351     /* defaults */
 352     screen_desktop_layout.orientation = prop_atoms.net_wm_orientation_horz;
 353     screen_desktop_layout.start_corner = prop_atoms.net_wm_topleft;
 354     screen_desktop_layout.rows = 1;
 355     screen_desktop_layout.columns = screen_num_desktops;
 356
 357     if (PROP_GETA32(ob_root, net_desktop_layout, cardinal, &data, &num)) {
 358         if (num == 3 || num == 4) {
 359             if (data[0] == prop_atoms.net_wm_orientation_vert)
 360                 screen_desktop_layout.orientation = data[0];
 361             if (num == 3)
 362                 screen_desktop_layout.start_corner =
 363                     prop_atoms.net_wm_topright;
 364             else {
 365                 if (data[3] == prop_atoms.net_wm_topright)
 366                     screen_desktop_layout.start_corner = data[3];
 367                 else if (data[3] == prop_atoms.net_wm_bottomright)
 368                     screen_desktop_layout.start_corner = data[3];
 369                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 370                     screen_desktop_layout.start_corner = data[3];
 371             }
 372
 373             /* fill in a zero rows/columns */
 374             if (!(data[1] == 0 && data[2] == 0)) { /* both 0's is bad data.. */
 375                 if (data[1] == 0) {
 376                     data[1] = (screen_num_desktops +
 377                                screen_num_desktops % data[2]) / data[2];
 378                 } else if (data[2] == 0) {
 379                     data[2] = (screen_num_desktops +
 380                                screen_num_desktops % data[1]) / data[1];
 381                 }
 382                 screen_desktop_layout.columns = data[1];
 383                 screen_desktop_layout.rows = data[2];
 384             }
 385
 386             /* bounds checking */
 387             if (screen_desktop_layout.orientation ==
 388                 prop_atoms.net_wm_orientation_horz) {
 389                 if (screen_desktop_layout.rows > screen_num_desktops)
 390                     screen_desktop_layout.rows = screen_num_desktops;
 391                 if (screen_desktop_layout.columns >
 392                     ((screen_num_desktops + screen_num_desktops %
 393                       screen_desktop_layout.rows) /
 394                      screen_desktop_layout.rows))
 395                     screen_desktop_layout.columns =
 396                         (screen_num_desktops + screen_num_desktops %
 397                          screen_desktop_layout.rows) /
 398                         screen_desktop_layout.rows;
 399             } else {
 400                 if (screen_desktop_layout.columns > screen_num_desktops)
 401                     screen_desktop_layout.columns = screen_num_desktops;
 402                 if (screen_desktop_layout.rows >
 403                     ((screen_num_desktops + screen_num_desktops %
 404                       screen_desktop_layout.columns) /
 405                      screen_desktop_layout.columns))
 406                     screen_desktop_layout.rows =
 407                         (screen_num_desktops + screen_num_desktops %
 408                          screen_desktop_layout.columns) /
 409                         screen_desktop_layout.columns;
 410             }
 411         }
 412         g_free(data);
 413     }
 414 }
 415
 416 void screen_update_desktop_names()
 417 {
 418     guint i;
 419
 420     /* empty the array */
 421     g_strfreev(screen_desktop_names);
 422     screen_desktop_names = NULL;
 423
 424     if (PROP_GETSS(ob_root, net_desktop_names, utf8, &screen_desktop_names))
 425         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 426     else
 427         i = 0;
 428     if (i <= screen_num_desktops) {
 429         screen_desktop_names = g_renew(char*, screen_desktop_names,
 430                                        screen_num_desktops + 1);
 431         screen_desktop_names[screen_num_desktops] = NULL;
 432         for (; i < screen_num_desktops; ++i)
 433             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 434     }
 435 }
 436
 437 void screen_show_desktop(gboolean show)
 438 {
 439     GList *it;
 440
 441     if (show == screen_showing_desktop) return; /* no change */
 442
 443     screen_showing_desktop = show;
 444
 445     if (show) {
 446         /* bottom to top */
 447         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 448             if (WINDOW_IS_CLIENT(it->data)) {
 449                 Client *client = it->data;
 450                 if (client->frame->visible && !client_should_show(client))
 451                     frame_hide(client->frame);
 452             }
 453         }
 454     } else {
 455         /* top to bottom */
 456         for (it = stacking_list; it != NULL; it = it->next) {
 457             if (WINDOW_IS_CLIENT(it->data)) {
 458                 Client *client = it->data;
 459                 if (!client->frame->visible && client_should_show(client))
 460                     frame_show(client->frame);
 461             }
 462         }
 463     }
 464
 465     if (show) {
 466         /* focus desktop */
 467         for (it = focus_order[screen_desktop]; it; it = it->next)
 468             if (((Client*)it->data)->type == Type_Desktop &&
 469                 client_focus(it->data))
 470                 break;
 471     } else {
 472         focus_fallback(Fallback_NoFocus);
 473     }
 474
 475     show = !!show; /* make it boolean */
 476     PROP_SET32(ob_root, net_showing_desktop, cardinal, show);
 477
 478     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
 479 }
 480
 481 void screen_install_colormap(Client *client, gboolean install)
 482 {
 483     XWindowAttributes wa;
 484
 485     if (client == NULL) {
 486         if (install)
 487             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 488         else
 489             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 490     } else {
 491         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 492             wa.colormap != None) {
 493             xerror_set_ignore(TRUE);
 494             if (install)
 495                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 496             else
 497                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 498             xerror_set_ignore(FALSE);
 499         }
 500     }
 501 }
 502
 503 void screen_update_struts()
 504 {
 505     GList *it;
 506     guint i;
 507
 508     g_free(strut);
 509     strut = g_new0(Strut, screen_num_desktops + 1);
 510
 511     for (it = client_list; it != NULL; it = it->next) {
 512         Client *c = it->data;
 513         if (c->iconic) continue; /* these dont count in the strut */
 514
 515         if (c->desktop == 0xffffffff) {
 516             for (i = 0; i < screen_num_desktops; ++i)
 517                 STRUT_ADD(strut[i], c->strut);
 518         } else {
 519             g_assert(c->desktop < screen_num_desktops);
 520             STRUT_ADD(strut[c->desktop], c->strut);
 521         }
 522         /* apply to the 'all desktops' strut */
 523         STRUT_ADD(strut[screen_num_desktops], c->strut);
 524     }
 525
 526     for (i = 0; i < screen_num_desktops; ++i)
 527         STRUT_ADD(strut[i], dock_strut);
 528
 529     screen_update_area();
 530 }
 531
 532 static void screen_update_area()
 533 {
 534     guint i;
 535     guint32 *dims;
 536
 537     g_free(area);
 538     area = g_new0(Rect, screen_num_desktops + 1);
 539
 540     dims = g_new(guint32, 4 * screen_num_desktops);
 541     for (i = 0; i < screen_num_desktops + 1; ++i) {
 542         Rect old_area = area[i];
 543 /*
 544   #ifdef    XINERAMA
 545   // reset to the full areas
 546   if (isXineramaActive())
 547   xineramaUsableArea = getXineramaAreas();
 548   #endif // XINERAMA
 549 */
 550
 551         RECT_SET(area[i], strut[i].left, strut[i].top,
 552                  screen_physical_size.width - (strut[i].left +
 553                                                strut[i].right),
 554                  screen_physical_size.height - (strut[i].top +
 555                                                 strut[i].bottom));
 556
 557 /*
 558   #ifdef    XINERAMA
 559   if (isXineramaActive()) {
 560   // keep each of the ximerama-defined areas inside the strut
 561   RectList::iterator xit, xend = xineramaUsableArea.end();
 562   for (xit = xineramaUsableArea.begin(); xit != xend; ++xit) {
 563   if (xit->x() < usableArea.x()) {
 564   xit->setX(usableArea.x());
 565   xit->setWidth(xit->width() - usableArea.x());
 566   }
 567   if (xit->y() < usableArea.y()) {
 568   xit->setY(usableArea.y());
 569   xit->setHeight(xit->height() - usableArea.y());
 570   }
 571   if (xit->x() + xit->width() > usableArea.width())
 572   xit->setWidth(usableArea.width() - xit->x());
 573   if (xit->y() + xit->height() > usableArea.height())
 574   xit->setHeight(usableArea.height() - xit->y());
 575   }
 576   }
 577   #endif // XINERAMA
 578 */
 579         if (!RECT_EQUAL(old_area, area[i])) {
 580             /* the area has changed, adjust all the maximized windows */
 581             GList *it;
 582             for (it = client_list; it; it = it->next) {
 583                 Client *c = it->data;
 584                 if (i < screen_num_desktops) {
 585                     if (c->desktop == i)
 586                         client_reconfigure(c);
 587                 } else {
 588                     /* the 'all desktops' size */
 589                     if (c->desktop == DESKTOP_ALL)
 590                         client_reconfigure(c);
 591                 }
 592             }
 593         }
 594
 595         /* don't set these for the 'all desktops' area */
 596         if (i < screen_num_desktops) {
 597             dims[(i * 4) + 0] = area[i].x;
 598             dims[(i * 4) + 1] = area[i].y;
 599             dims[(i * 4) + 2] = area[i].width;
 600             dims[(i * 4) + 3] = area[i].height;
 601         }
 602     }
 603     PROP_SETA32(ob_root, net_workarea, cardinal,
 604                 dims, 4 * screen_num_desktops);
 605     g_free(dims);
 606 }
 607
 608 Rect *screen_area(guint desktop)
 609 {
 610     if (desktop >= screen_num_desktops) {
 611         if (desktop == DESKTOP_ALL)
 612             return &area[screen_num_desktops];
 613         return NULL;
 614     }
 615     return &area[desktop];
 616 }
 617
 618 Strut *screen_strut(guint desktop)
 619 {
 620     if (desktop >= screen_num_desktops) {
 621         if (desktop == DESKTOP_ALL)
 622             return &strut[screen_num_desktops];
 623         return NULL;
 624     }
 625     return &strut[desktop];
 626 }
 627
 628 static void set_root_cursor()
 629 {
 630 #ifdef USE_LIBSN
 631         if (sn_busy_cnt)
 632             XDefineCursor(ob_display, ob_root, ob_cursors.busy);
 633         else
 634 #endif
 635             XDefineCursor(ob_display, ob_root, ob_cursors.ptr);
 636 }
 637
 638 #ifdef USE_LIBSN
 639 static void sn_timeout(void *data)
 640 {
 641     timer_stop(sn_timer);
 642     sn_timer = NULL;
 643     sn_busy_cnt = 0;
 644
 645     set_root_cursor();
 646 }
 647
 648 static void sn_event_func(SnMonitorEvent *ev, void *data)
 649 {
 650     SnStartupSequence *seq;
 651     const char *seq_id, *bin_name;
 652     int cnt = sn_busy_cnt;
 653
 654     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
 655         return;
 656
 657     seq_id = sn_startup_sequence_get_id(seq);
 658     bin_name = sn_startup_sequence_get_binary_name(seq);
 659
 660     if (!(seq_id && bin_name))
 661         return;
 662
 663     switch (sn_monitor_event_get_type(ev)) {
 664     case SN_MONITOR_EVENT_INITIATED:
 665         ++sn_busy_cnt;
 666         if (sn_timer)
 667             timer_stop(sn_timer);
 668         /* 30 second timeout for apps to start */
 669         sn_timer = timer_start(30 * 1000000, sn_timeout, NULL);
 670         break;
 671     case SN_MONITOR_EVENT_CHANGED:
 672         break;
 673     case SN_MONITOR_EVENT_COMPLETED:
 674         if (sn_busy_cnt) --sn_busy_cnt;
 675         if (sn_timer) {
 676             timer_stop(sn_timer);
 677             sn_timer = NULL;
 678         }
 679         break;
 680     case SN_MONITOR_EVENT_CANCELED:
 681         if (sn_busy_cnt) --sn_busy_cnt;
 682         if (sn_timer) {
 683             timer_stop(sn_timer);
 684             sn_timer = NULL;
 685         }
 686     };
 687
 688     if (sn_busy_cnt != cnt)
 689         set_root_cursor();
 690 }
 691 #endif