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_num_monitors    = 0;
  35 guint    screen_desktop         = 0;
  36 Size     screen_physical_size;
  37 gboolean screen_showing_desktop;
  38 DesktopLayout screen_desktop_layout;
  39 char   **screen_desktop_names = NULL;
  40
  41 static Rect  **area = NULL; /* array of desktop holding array of
  42                                xinerama areas */
  43 static Rect  *monitor_area = NULL;
  44 static Window support_window = None;
  45
  46 #ifdef USE_LIBSN
  47 static SnMonitorContext *sn_context;
  48 static int sn_busy_cnt;
  49 static ObTimer *sn_timer = NULL;
  50
  51 static void sn_event_func(SnMonitorEvent *event, void *data);
  52 #endif
  53
  54 static void set_root_cursor();
  55
  56 gboolean screen_annex()
  57 {
  58     pid_t pid;
  59     int i, num_support;
  60     guint32 *supported;
  61
  62     xerror_set_ignore(TRUE);
  63     xerror_occured = FALSE;
  64     XSelectInput(ob_display, ob_root, ROOT_EVENTMASK);
  65     xerror_set_ignore(FALSE);
  66     if (xerror_occured) {
  67         g_message("A window manager is already running on screen %d",
  68                   ob_screen);
  69         return FALSE;
  70     }
  71
  72
  73     g_message("Managing screen %d", ob_screen);
  74
  75     set_root_cursor();
  76
  77     /* set the OPENBOX_PID hint */
  78     pid = getpid();
  79     PROP_SET32(ob_root, openbox_pid, cardinal, pid);
  80
  81     /* create the netwm support window */
  82     support_window = XCreateSimpleWindow(ob_display, ob_root, 0,0,1,1,0,0,0);
  83
  84     /* set supporting window */
  85     PROP_SET32(ob_root, net_supporting_wm_check, window, support_window);
  86
  87     /* set properties on the supporting window */
  88     PROP_SETS(support_window, net_wm_name, "Openbox");
  89     PROP_SET32(support_window, net_supporting_wm_check, window,support_window);
  90
  91     /* set the _NET_SUPPORTED_ATOMS hint */
  92     num_support = 61;
  93     i = 0;
  94     supported = g_new(guint32, num_support);
  95     supported[i++] = prop_atoms.net_current_desktop;
  96     supported[i++] = prop_atoms.net_number_of_desktops;
  97     supported[i++] = prop_atoms.net_desktop_geometry;
  98     supported[i++] = prop_atoms.net_desktop_viewport;
  99     supported[i++] = prop_atoms.net_active_window;
 100     supported[i++] = prop_atoms.net_workarea;
 101     supported[i++] = prop_atoms.net_client_list;
 102     supported[i++] = prop_atoms.net_client_list_stacking;
 103     supported[i++] = prop_atoms.net_desktop_names;
 104     supported[i++] = prop_atoms.net_close_window;
 105     supported[i++] = prop_atoms.net_desktop_layout;
 106     supported[i++] = prop_atoms.net_showing_desktop;
 107     supported[i++] = prop_atoms.net_wm_name;
 108     supported[i++] = prop_atoms.net_wm_visible_name;
 109     supported[i++] = prop_atoms.net_wm_icon_name;
 110     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 111     supported[i++] = prop_atoms.net_wm_desktop;
 112     supported[i++] = prop_atoms.net_wm_strut;
 113     supported[i++] = prop_atoms.net_wm_window_type;
 114     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 115     supported[i++] = prop_atoms.net_wm_window_type_dock;
 116     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 117     supported[i++] = prop_atoms.net_wm_window_type_menu;
 118     supported[i++] = prop_atoms.net_wm_window_type_utility;
 119     supported[i++] = prop_atoms.net_wm_window_type_splash;
 120     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 121     supported[i++] = prop_atoms.net_wm_window_type_normal;
 122     supported[i++] = prop_atoms.net_wm_allowed_actions;
 123     supported[i++] = prop_atoms.net_wm_action_move;
 124     supported[i++] = prop_atoms.net_wm_action_resize;
 125     supported[i++] = prop_atoms.net_wm_action_minimize;
 126     supported[i++] = prop_atoms.net_wm_action_shade;
 127     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 128     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 129     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 130     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 131     supported[i++] = prop_atoms.net_wm_action_close;
 132     supported[i++] = prop_atoms.net_wm_state;
 133     supported[i++] = prop_atoms.net_wm_state_modal;
 134     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 135     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 136     supported[i++] = prop_atoms.net_wm_state_shaded;
 137     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 138     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 139     supported[i++] = prop_atoms.net_wm_state_hidden;
 140     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 141     supported[i++] = prop_atoms.net_wm_state_above;
 142     supported[i++] = prop_atoms.net_wm_state_below;
 143     supported[i++] = prop_atoms.net_moveresize_window;
 144     supported[i++] = prop_atoms.net_wm_moveresize;
 145     supported[i++] = prop_atoms.net_wm_moveresize_size_topleft;
 146     supported[i++] = prop_atoms.net_wm_moveresize_size_top;
 147     supported[i++] = prop_atoms.net_wm_moveresize_size_topright;
 148     supported[i++] = prop_atoms.net_wm_moveresize_size_right;
 149     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomright;
 150     supported[i++] = prop_atoms.net_wm_moveresize_size_bottom;
 151     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomleft;
 152     supported[i++] = prop_atoms.net_wm_moveresize_size_left;
 153     supported[i++] = prop_atoms.net_wm_moveresize_move;
 154     supported[i++] = prop_atoms.net_wm_moveresize_size_keyboard;
 155     supported[i++] = prop_atoms.net_wm_moveresize_move_keyboard;
 156     g_assert(i == num_support);
 157 /*
 158   supported[] = prop_atoms.net_wm_action_stick;
 159 */
 160
 161     PROP_SETA32(ob_root, net_supported, atom, supported, num_support);
 162     g_free(supported);
 163
 164     return TRUE;
 165 }
 166
 167 void screen_startup()
 168 {
 169     GSList *it;
 170     guint i;
 171
 172     /* get the initial size */
 173     screen_resize();
 174
 175     /* set the names */
 176     screen_desktop_names = g_new(char*,
 177                                  g_slist_length(config_desktops_names) + 1);
 178     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 179         screen_desktop_names[i] = it->data; /* dont strdup */
 180     screen_desktop_names[i] = NULL;
 181     PROP_SETSS(ob_root, net_desktop_names, screen_desktop_names);
 182     g_free(screen_desktop_names); /* dont free the individual strings */
 183     screen_desktop_names = NULL;
 184
 185     screen_num_desktops = 0;
 186     screen_set_num_desktops(config_desktops_num);
 187     if (startup_desktop >= screen_num_desktops)
 188         startup_desktop = 0;
 189     screen_desktop = startup_desktop;
 190     screen_set_desktop(startup_desktop);
 191
 192     /* don't start in showing-desktop mode */
 193     screen_showing_desktop = FALSE;
 194     PROP_SET32(ob_root, net_showing_desktop, cardinal, screen_showing_desktop);
 195
 196     screen_update_layout();
 197
 198 #ifdef USE_LIBSN
 199     sn_context = sn_monitor_context_new(ob_sn_display, ob_screen,
 200                                         sn_event_func, NULL, NULL);
 201     sn_busy_cnt = 0;
 202 #endif
 203 }
 204
 205 void screen_shutdown()
 206 {
 207     Rect **r;
 208
 209     XSelectInput(ob_display, ob_root, NoEventMask);
 210
 211     PROP_ERASE(ob_root, openbox_pid); /* we're not running here no more! */
 212     PROP_ERASE(ob_root, net_supported); /* not without us */
 213     PROP_ERASE(ob_root, net_showing_desktop); /* don't keep this mode */
 214
 215     XDestroyWindow(ob_display, support_window);
 216
 217     g_strfreev(screen_desktop_names);
 218     for (r = area; *r; ++r)
 219         g_free(*r);
 220     g_free(area);
 221 }
 222
 223 void screen_resize()
 224 {
 225     static int oldw = 0, oldh = 0;
 226     int w, h;
 227     GList *it;
 228     guint32 geometry[2];
 229
 230     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 231     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 232
 233     if (w == oldw && h == oldh) return;
 234
 235     oldw = w; oldh = h;
 236
 237     /* Set the _NET_DESKTOP_GEOMETRY hint */
 238     screen_physical_size.width = geometry[0] = w;
 239     screen_physical_size.height = geometry[1] = h;
 240     PROP_SETA32(ob_root, net_desktop_geometry, cardinal, geometry, 2);
 241
 242     if (ob_state == OB_STATE_STARTING)
 243         return;
 244
 245     dock_configure();
 246     screen_update_areas();
 247
 248     for (it = client_list; it; it = it->next)
 249         client_move_onscreen(it->data);
 250 }
 251
 252 void screen_set_num_desktops(guint num)
 253 {
 254     guint i, old;
 255     guint32 *viewport;
 256     GList *it;
 257
 258     g_assert(num > 0);
 259
 260     old = screen_num_desktops;
 261     screen_num_desktops = num;
 262     PROP_SET32(ob_root, net_number_of_desktops, cardinal, num);
 263
 264     /* set the viewport hint */
 265     viewport = g_new0(guint32, num * 2);
 266     PROP_SETA32(ob_root, net_desktop_viewport, cardinal, viewport, num * 2);
 267     g_free(viewport);
 268
 269     /* the number of rows/columns will differ */
 270     screen_update_layout();
 271
 272     /* may be some unnamed desktops that we need to fill in with names */
 273     screen_update_desktop_names();
 274
 275     /* update the focus lists */
 276     /* free our lists for the desktops which have disappeared */
 277     for (i = num; i < old; ++i)
 278         g_list_free(focus_order[i]);
 279     /* realloc the array */
 280     focus_order = g_renew(GList*, focus_order, num);
 281     /* set the new lists to be empty */
 282     for (i = old; i < num; ++i)
 283         focus_order[i] = NULL;
 284
 285     /* move windows on desktops that will no longer exist! */
 286     for (it = client_list; it != NULL; it = it->next) {
 287         ObClient *c = it->data;
 288         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 289             client_set_desktop(c, num - 1, FALSE);
 290     }
 291
 292     /* change our struts/area to match (after moving windows) */
 293     screen_update_areas();
 294
 295     dispatch_ob(Event_Ob_NumDesktops, num, old);
 296
 297     /* change our desktop if we're on one that no longer exists! */
 298     if (screen_desktop >= screen_num_desktops)
 299         screen_set_desktop(num - 1);
 300 }
 301
 302 void screen_set_desktop(guint num)
 303 {
 304     GList *it;
 305     guint old;
 306     XEvent e;
 307
 308     g_assert(num < screen_num_desktops);
 309
 310     old = screen_desktop;
 311     screen_desktop = num;
 312     PROP_SET32(ob_root, net_current_desktop, cardinal, num);
 313
 314     if (old == num) return;
 315
 316     g_message("Moving to desktop %d", num+1);
 317
 318     /* show windows before hiding the rest to lessen the enter/leave events */
 319
 320     /* show windows from top to bottom */
 321     for (it = stacking_list; it != NULL; it = it->next) {
 322         if (WINDOW_IS_CLIENT(it->data)) {
 323             ObClient *c = it->data;
 324             if (!c->frame->visible && client_should_show(c))
 325                 frame_show(c->frame);
 326         }
 327     }
 328
 329     /* hide windows from bottom to top */
 330     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 331         if (WINDOW_IS_CLIENT(it->data)) {
 332             ObClient *c = it->data;
 333             if (c->frame->visible && !client_should_show(c))
 334                 frame_hide(c->frame);
 335         }
 336     }
 337
 338     /* focus the last focused window on the desktop, and ignore enter events
 339        from the switch so it doesnt mess with the focus */
 340     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 341 #ifdef DEBUG_FOCUS
 342     g_message("switch fallback");
 343 #endif
 344     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 345 #ifdef DEBUG_FOCUS
 346     g_message("/switch fallback");
 347 #endif
 348
 349     dispatch_ob(Event_Ob_Desktop, num, old);
 350 }
 351
 352 void screen_update_layout()
 353 {
 354     ObOrientation orient;
 355     ObCorner corner;
 356     guint rows;
 357     guint cols;
 358     guint32 *data;
 359     guint num;
 360     gboolean valid = FALSE;
 361
 362     if (PROP_GETA32(ob_root, net_desktop_layout, cardinal, &data, &num)) {
 363         if (num == 3 || num == 4) {
 364
 365             if (data[0] == prop_atoms.net_wm_orientation_vert)
 366                 orient = OB_ORIENTATION_VERT;
 367             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 368                 orient = OB_ORIENTATION_HORZ;
 369             else
 370                 goto screen_update_layout_bail;
 371
 372             if (num < 4)
 373                 corner = OB_CORNER_TOPLEFT;
 374             else {
 375                 if (data[3] == prop_atoms.net_wm_topright)
 376                     corner = OB_CORNER_TOPRIGHT;
 377                 else if (data[3] == prop_atoms.net_wm_bottomright)
 378                     corner = OB_CORNER_BOTTOMRIGHT;
 379                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 380                     corner = OB_CORNER_BOTTOMLEFT;
 381                 else
 382                     goto screen_update_layout_bail;
 383             }
 384
 385             /* fill in a zero rows/columns */
 386             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 387                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 388                 goto screen_update_layout_bail;
 389             } else {
 390                 if (data[1] == 0) {
 391                     data[1] = (screen_num_desktops +
 392                                screen_num_desktops % data[2]) / data[2];
 393                 } else if (data[2] == 0) {
 394                     data[2] = (screen_num_desktops +
 395                                screen_num_desktops % data[1]) / data[1];
 396                 }
 397                 cols = data[1];
 398                 rows = data[2];
 399             }
 400
 401             /* bounds checking */
 402             if (orient == OB_ORIENTATION_HORZ) {
 403                 rows = MIN(rows, screen_num_desktops);
 404                 cols = MIN(cols, ((screen_num_desktops +
 405                                      (screen_num_desktops % rows)) / rows));
 406             } else {
 407                 cols = MIN(cols, screen_num_desktops);
 408                 rows = MIN(rows, ((screen_num_desktops +
 409                                      (screen_num_desktops % cols)) / cols));
 410             }
 411
 412             valid = TRUE;
 413         }
 414     screen_update_layout_bail:
 415         g_free(data);
 416     }
 417
 418     if (!valid) {
 419         /* defaults */
 420         orient = OB_ORIENTATION_HORZ;
 421         corner = OB_CORNER_TOPLEFT;
 422         rows = 1;
 423         cols = screen_num_desktops;
 424     }
 425
 426     screen_desktop_layout.orientation = orient;
 427     screen_desktop_layout.start_corner = corner;
 428     screen_desktop_layout.rows = rows;
 429     screen_desktop_layout.columns = cols;
 430 }
 431
 432 void screen_update_desktop_names()
 433 {
 434     guint i;
 435
 436     /* empty the array */
 437     g_strfreev(screen_desktop_names);
 438     screen_desktop_names = NULL;
 439
 440     if (PROP_GETSS(ob_root, net_desktop_names, utf8, &screen_desktop_names))
 441         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 442     else
 443         i = 0;
 444     if (i <= screen_num_desktops) {
 445         screen_desktop_names = g_renew(char*, screen_desktop_names,
 446                                        screen_num_desktops + 1);
 447         screen_desktop_names[screen_num_desktops] = NULL;
 448         for (; i < screen_num_desktops; ++i)
 449             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 450     }
 451 }
 452
 453 void screen_show_desktop(gboolean show)
 454 {
 455     GList *it;
 456
 457     if (show == screen_showing_desktop) return; /* no change */
 458
 459     screen_showing_desktop = show;
 460
 461     if (show) {
 462         /* bottom to top */
 463         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 464             if (WINDOW_IS_CLIENT(it->data)) {
 465                 ObClient *client = it->data;
 466                 if (client->frame->visible && !client_should_show(client))
 467                     frame_hide(client->frame);
 468             }
 469         }
 470     } else {
 471         /* top to bottom */
 472         for (it = stacking_list; it != NULL; it = it->next) {
 473             if (WINDOW_IS_CLIENT(it->data)) {
 474                 ObClient *client = it->data;
 475                 if (!client->frame->visible && client_should_show(client))
 476                     frame_show(client->frame);
 477             }
 478         }
 479     }
 480
 481     if (show) {
 482         /* focus desktop */
 483         for (it = focus_order[screen_desktop]; it; it = it->next)
 484             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 485                 client_focus(it->data))
 486                 break;
 487     } else {
 488         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 489     }
 490
 491     show = !!show; /* make it boolean */
 492     PROP_SET32(ob_root, net_showing_desktop, cardinal, show);
 493
 494     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
 495 }
 496
 497 void screen_install_colormap(ObClient *client, gboolean install)
 498 {
 499     XWindowAttributes wa;
 500
 501     if (client == NULL) {
 502         if (install)
 503             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 504         else
 505             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 506     } else {
 507         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 508             wa.colormap != None) {
 509             xerror_set_ignore(TRUE);
 510             if (install)
 511                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 512             else
 513                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 514             xerror_set_ignore(FALSE);
 515         }
 516     }
 517 }
 518
 519 void screen_update_areas()
 520 {
 521     guint i, x;
 522     guint32 *dims;
 523     Rect **old_area = area;
 524     Rect **rit;
 525     GList *it;
 526
 527     g_free(monitor_area);
 528     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 529
 530     if (area) {
 531         for (i = 0; area[i]; ++i)
 532             g_free(area[i]);
 533         g_free(area);
 534     }
 535
 536     area = g_new(Rect*, screen_num_desktops + 2);
 537     for (i = 0; i < screen_num_desktops + 1; ++i)
 538         area[i] = g_new(Rect, screen_num_monitors + 1);
 539     area[i] = NULL;
 540
 541     dims = g_new(guint32, 4 * screen_num_desktops);
 542
 543     rit = old_area;
 544     for (i = 0; i < screen_num_desktops + 1; ++i) {
 545         Strut s;
 546         int l, r, t, b;
 547
 548         /* calc the xinerama areas */
 549         for (x = 0; x < screen_num_monitors; ++x) {
 550             area[i][x] = monitor_area[x];
 551             if (x == 0) {
 552                 l = monitor_area[x].x;
 553                 t = monitor_area[x].y;
 554                 r = monitor_area[x].x + monitor_area[x].width - 1;
 555                 b = monitor_area[x].y + monitor_area[x].height - 1;
 556             } else {
 557                 l = MIN(l, monitor_area[x].x);
 558                 t = MIN(t, monitor_area[x].y);
 559                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 560                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 561             }
 562         }
 563         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 564
 565         /* apply struts */
 566         STRUT_SET(s, 0, 0, 0, 0);
 567         for (it = client_list; it; it = it->next)
 568             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 569         STRUT_ADD(s, dock_strut);
 570
 571         if (s.left) {
 572             int o;
 573
 574             /* find the left-most xin heads, i do this in 2 loops :| */
 575             o = area[i][0].x;
 576             for (x = 1; x < screen_num_monitors; ++x)
 577                 o = MIN(o, area[i][x].x);
 578
 579             for (x = 0; x < screen_num_monitors; ++x) {
 580                 int edge = o + s.left - area[i][x].x;
 581                 if (edge > 0) {
 582                     area[i][x].x += edge;
 583                     area[i][x].width -= edge;
 584                 }
 585             }
 586
 587             area[i][screen_num_monitors].x += s.left;
 588             area[i][screen_num_monitors].width -= s.left;
 589         }
 590         if (s.top) {
 591             int o;
 592
 593             /* find the left-most xin heads, i do this in 2 loops :| */
 594             o = area[i][0].y;
 595             for (x = 1; x < screen_num_monitors; ++x)
 596                 o = MIN(o, area[i][x].y);
 597
 598             for (x = 0; x < screen_num_monitors; ++x) {
 599                 int edge = o + s.top - area[i][x].y;
 600                 if (edge > 0) {
 601                     area[i][x].y += edge;
 602                     area[i][x].height -= edge;
 603                 }
 604             }
 605
 606             area[i][screen_num_monitors].y += s.top;
 607             area[i][screen_num_monitors].height -= s.top;
 608         }
 609         if (s.right) {
 610             int o;
 611
 612             /* find the bottom-most xin heads, i do this in 2 loops :| */
 613             o = area[i][0].x + area[i][0].width - 1;
 614             for (x = 1; x < screen_num_monitors; ++x)
 615                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 616
 617             for (x = 0; x < screen_num_monitors; ++x) {
 618                 int edge = (area[i][x].x + area[i][x].width - 1) -
 619                     (o - s.right);
 620                 if (edge > 0)
 621                     area[i][x].width -= edge;
 622             }
 623
 624             area[i][screen_num_monitors].width -= s.right;
 625         }
 626         if (s.bottom) {
 627             int o;
 628
 629             /* find the bottom-most xin heads, i do this in 2 loops :| */
 630             o = area[i][0].y + area[i][0].height - 1;
 631             for (x = 1; x < screen_num_monitors; ++x)
 632                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 633
 634             for (x = 0; x < screen_num_monitors; ++x) {
 635                 int edge = (area[i][x].y + area[i][x].height - 1) -
 636                     (o - s.bottom);
 637                 if (edge > 0)
 638                     area[i][x].height -= edge;
 639             }
 640
 641             area[i][screen_num_monitors].height -= s.bottom;
 642         }
 643
 644         /* XXX when dealing with partial struts, if its in a single
 645            xinerama area, then only subtract it from that area's space
 646         for (x = 0; x < screen_num_monitors; ++x) {
 647             GList *it;
 648
 649
 650                do something smart with it for the 'all xinerama areas' one...
 651
 652             for (it = client_list; it; it = it->next) {
 653
 654                 XXX if gunna test this shit, then gotta worry about when
 655                 the client moves between xinerama heads..
 656
 657                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
 658                                        area[i][x])) {
 659
 660                 }
 661             }
 662         }
 663         */
 664
 665         /* XXX optimize when this is run? */
 666
 667         /* the area has changed, adjust all the maximized
 668            windows */
 669         for (it = client_list; it; it = it->next) {
 670             ObClient *c = it->data;
 671             if (i < screen_num_desktops) {
 672                 if (c->desktop == i)
 673                     client_reconfigure(c);
 674             } else if (c->desktop == DESKTOP_ALL)
 675                 client_reconfigure(c);
 676         }
 677         if (i < screen_num_desktops) {
 678             /* don't set these for the 'all desktops' area */
 679             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
 680             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
 681             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
 682             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
 683         }
 684     }
 685     PROP_SETA32(ob_root, net_workarea, cardinal,
 686                 dims, 4 * screen_num_desktops);
 687
 688     g_free(dims);
 689 }
 690
 691 Rect *screen_area(guint desktop)
 692 {
 693     return screen_area_monitor(desktop, screen_num_monitors);
 694 }
 695
 696 Rect *screen_area_monitor(guint desktop, guint head)
 697 {
 698     if (head > screen_num_monitors)
 699         return NULL;
 700     if (desktop >= screen_num_desktops) {
 701         if (desktop == DESKTOP_ALL)
 702             return &area[screen_num_desktops][head];
 703         return NULL;
 704     }
 705     return &area[desktop][head];
 706 }
 707
 708 Rect *screen_physical_area()
 709 {
 710     return screen_physical_area_monitor(screen_num_monitors);
 711 }
 712
 713 Rect *screen_physical_area_monitor(guint head)
 714 {
 715     if (head > screen_num_monitors)
 716         return NULL;
 717     return &monitor_area[head];
 718 }
 719
 720 static void set_root_cursor()
 721 {
 722 #ifdef USE_LIBSN
 723         if (sn_busy_cnt)
 724             XDefineCursor(ob_display, ob_root, ob_cursor(OB_CURSOR_BUSY));
 725         else
 726 #endif
 727             XDefineCursor(ob_display, ob_root, ob_cursor(OB_CURSOR_POINTER));
 728 }
 729
 730 #ifdef USE_LIBSN
 731 static void sn_timeout(void *data)
 732 {
 733     timer_stop(sn_timer);
 734     sn_timer = NULL;
 735     sn_busy_cnt = 0;
 736
 737     set_root_cursor();
 738 }
 739
 740 static void sn_event_func(SnMonitorEvent *ev, void *data)
 741 {
 742     SnStartupSequence *seq;
 743     const char *seq_id, *bin_name;
 744     int cnt = sn_busy_cnt;
 745
 746     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
 747         return;
 748
 749     seq_id = sn_startup_sequence_get_id(seq);
 750     bin_name = sn_startup_sequence_get_binary_name(seq);
 751
 752     if (!(seq_id && bin_name))
 753         return;
 754
 755     switch (sn_monitor_event_get_type(ev)) {
 756     case SN_MONITOR_EVENT_INITIATED:
 757         ++sn_busy_cnt;
 758         if (sn_timer)
 759             timer_stop(sn_timer);
 760         /* 30 second timeout for apps to start */
 761         sn_timer = timer_start(30 * 1000000, sn_timeout, NULL);
 762         break;
 763     case SN_MONITOR_EVENT_CHANGED:
 764         break;
 765     case SN_MONITOR_EVENT_COMPLETED:
 766         if (sn_busy_cnt) --sn_busy_cnt;
 767         if (sn_timer) {
 768             timer_stop(sn_timer);
 769             sn_timer = NULL;
 770         }
 771         break;
 772     case SN_MONITOR_EVENT_CANCELED:
 773         if (sn_busy_cnt) --sn_busy_cnt;
 774         if (sn_timer) {
 775             timer_stop(sn_timer);
 776             sn_timer = NULL;
 777         }
 778     };
 779
 780     if (sn_busy_cnt != cnt)
 781         set_root_cursor();
 782 }
 783 #endif