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 Timer *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 static gboolean running;
  57 static int another_running(Display *d, XErrorEvent *e)
  58 {
  59     (void)d;(void)e;
  60     g_message("A window manager is already running on screen %d",
  61               ob_screen);
  62     running = TRUE;
  63     return -1;
  64 }
  65
  66 gboolean screen_annex()
  67 {
  68     XErrorHandler old;
  69     pid_t pid;
  70     int i, num_support;
  71     guint32 *supported;
  72
  73     running = FALSE;
  74     old = XSetErrorHandler(another_running);
  75     XSelectInput(ob_display, ob_root, ROOT_EVENTMASK);
  76     XSync(ob_display, FALSE);
  77     XSetErrorHandler(old);
  78     if (running)
  79         return FALSE;
  80
  81     g_message("Managing screen %d", ob_screen);
  82
  83     set_root_cursor();
  84
  85     /* set the OPENBOX_PID hint */
  86     pid = getpid();
  87     PROP_SET32(ob_root, openbox_pid, cardinal, pid);
  88
  89     /* create the netwm support window */
  90     support_window = XCreateSimpleWindow(ob_display, ob_root, 0,0,1,1,0,0,0);
  91
  92     /* set supporting window */
  93     PROP_SET32(ob_root, net_supporting_wm_check, window, support_window);
  94
  95     /* set properties on the supporting window */
  96     PROP_SETS(support_window, net_wm_name, "Openbox");
  97     PROP_SET32(support_window, net_supporting_wm_check, window,support_window);
  98
  99     /* set the _NET_SUPPORTED_ATOMS hint */
 100     num_support = 61;
 101     i = 0;
 102     supported = g_new(guint32, num_support);
 103     supported[i++] = prop_atoms.net_current_desktop;
 104     supported[i++] = prop_atoms.net_number_of_desktops;
 105     supported[i++] = prop_atoms.net_desktop_geometry;
 106     supported[i++] = prop_atoms.net_desktop_viewport;
 107     supported[i++] = prop_atoms.net_active_window;
 108     supported[i++] = prop_atoms.net_workarea;
 109     supported[i++] = prop_atoms.net_client_list;
 110     supported[i++] = prop_atoms.net_client_list_stacking;
 111     supported[i++] = prop_atoms.net_desktop_names;
 112     supported[i++] = prop_atoms.net_close_window;
 113     supported[i++] = prop_atoms.net_desktop_layout;
 114     supported[i++] = prop_atoms.net_showing_desktop;
 115     supported[i++] = prop_atoms.net_wm_name;
 116     supported[i++] = prop_atoms.net_wm_visible_name;
 117     supported[i++] = prop_atoms.net_wm_icon_name;
 118     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 119     supported[i++] = prop_atoms.net_wm_desktop;
 120     supported[i++] = prop_atoms.net_wm_strut;
 121     supported[i++] = prop_atoms.net_wm_window_type;
 122     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 123     supported[i++] = prop_atoms.net_wm_window_type_dock;
 124     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 125     supported[i++] = prop_atoms.net_wm_window_type_menu;
 126     supported[i++] = prop_atoms.net_wm_window_type_utility;
 127     supported[i++] = prop_atoms.net_wm_window_type_splash;
 128     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 129     supported[i++] = prop_atoms.net_wm_window_type_normal;
 130     supported[i++] = prop_atoms.net_wm_allowed_actions;
 131     supported[i++] = prop_atoms.net_wm_action_move;
 132     supported[i++] = prop_atoms.net_wm_action_resize;
 133     supported[i++] = prop_atoms.net_wm_action_minimize;
 134     supported[i++] = prop_atoms.net_wm_action_shade;
 135     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 136     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 137     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 138     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 139     supported[i++] = prop_atoms.net_wm_action_close;
 140     supported[i++] = prop_atoms.net_wm_state;
 141     supported[i++] = prop_atoms.net_wm_state_modal;
 142     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 143     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 144     supported[i++] = prop_atoms.net_wm_state_shaded;
 145     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 146     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 147     supported[i++] = prop_atoms.net_wm_state_hidden;
 148     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 149     supported[i++] = prop_atoms.net_wm_state_above;
 150     supported[i++] = prop_atoms.net_wm_state_below;
 151     supported[i++] = prop_atoms.net_moveresize_window;
 152     supported[i++] = prop_atoms.net_wm_moveresize;
 153     supported[i++] = prop_atoms.net_wm_moveresize_size_topleft;
 154     supported[i++] = prop_atoms.net_wm_moveresize_size_top;
 155     supported[i++] = prop_atoms.net_wm_moveresize_size_topright;
 156     supported[i++] = prop_atoms.net_wm_moveresize_size_right;
 157     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomright;
 158     supported[i++] = prop_atoms.net_wm_moveresize_size_bottom;
 159     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomleft;
 160     supported[i++] = prop_atoms.net_wm_moveresize_size_left;
 161     supported[i++] = prop_atoms.net_wm_moveresize_move;
 162     supported[i++] = prop_atoms.net_wm_moveresize_size_keyboard;
 163     supported[i++] = prop_atoms.net_wm_moveresize_move_keyboard;
 164     g_assert(i == num_support);
 165 /*
 166   supported[] = prop_atoms.net_wm_action_stick;
 167 */
 168
 169     PROP_SETA32(ob_root, net_supported, atom, supported, num_support);
 170     g_free(supported);
 171
 172     return TRUE;
 173 }
 174
 175 void screen_startup()
 176 {
 177     GSList *it;
 178     guint i;
 179
 180     /* get the initial size */
 181     screen_resize();
 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     Rect **r;
 216
 217     XSelectInput(ob_display, ob_root, NoEventMask);
 218
 219     PROP_ERASE(ob_root, openbox_pid); /* we're not running here no more! */
 220     PROP_ERASE(ob_root, net_supported); /* not without us */
 221     PROP_ERASE(ob_root, net_showing_desktop); /* don't keep this mode */
 222
 223     XDestroyWindow(ob_display, support_window);
 224
 225     g_strfreev(screen_desktop_names);
 226     for (r = area; *r; ++r)
 227         g_free(*r);
 228     g_free(area);
 229 }
 230
 231 void screen_resize()
 232 {
 233     static int oldw = 0, oldh = 0;
 234     int w, h;
 235     GList *it;
 236     guint32 geometry[2];
 237
 238     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 239     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 240
 241     if (w == oldw && h == oldh) return;
 242
 243     oldw = w; oldh = h;
 244
 245     /* Set the _NET_DESKTOP_GEOMETRY hint */
 246     screen_physical_size.width = geometry[0] = w;
 247     screen_physical_size.height = geometry[1] = h;
 248     PROP_SETA32(ob_root, net_desktop_geometry, cardinal, geometry, 2);
 249
 250     if (ob_state == OB_STATE_STARTING)
 251         return;
 252
 253     dock_configure();
 254     screen_update_areas();
 255
 256     for (it = client_list; it; it = it->next)
 257         client_move_onscreen(it->data);
 258 }
 259
 260 void screen_set_num_desktops(guint num)
 261 {
 262     guint i, old;
 263     guint32 *viewport;
 264     GList *it;
 265
 266     g_assert(num > 0);
 267
 268     old = screen_num_desktops;
 269     screen_num_desktops = num;
 270     PROP_SET32(ob_root, net_number_of_desktops, cardinal, num);
 271
 272     /* set the viewport hint */
 273     viewport = g_new0(guint32, num * 2);
 274     PROP_SETA32(ob_root, net_desktop_viewport, cardinal, viewport, num * 2);
 275     g_free(viewport);
 276
 277     /* the number of rows/columns will differ */
 278     screen_update_layout();
 279
 280     /* may be some unnamed desktops that we need to fill in with names */
 281     screen_update_desktop_names();
 282
 283     /* update the focus lists */
 284     /* free our lists for the desktops which have disappeared */
 285     for (i = num; i < old; ++i)
 286         g_list_free(focus_order[i]);
 287     /* realloc the array */
 288     focus_order = g_renew(GList*, focus_order, num);
 289     /* set the new lists to be empty */
 290     for (i = old; i < num; ++i)
 291         focus_order[i] = NULL;
 292
 293     /* move windows on desktops that will no longer exist! */
 294     for (it = client_list; it != NULL; it = it->next) {
 295         Client *c = it->data;
 296         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 297             client_set_desktop(c, num - 1, FALSE);
 298     }
 299
 300     /* change our struts/area to match (after moving windows) */
 301     screen_update_areas();
 302
 303     dispatch_ob(Event_Ob_NumDesktops, num, old);
 304
 305     /* change our desktop if we're on one that no longer exists! */
 306     if (screen_desktop >= screen_num_desktops)
 307         screen_set_desktop(num - 1);
 308 }
 309
 310 void screen_set_desktop(guint num)
 311 {
 312     GList *it;
 313     guint old;
 314     XEvent e;
 315
 316     g_assert(num < screen_num_desktops);
 317
 318     old = screen_desktop;
 319     screen_desktop = num;
 320     PROP_SET32(ob_root, net_current_desktop, cardinal, num);
 321
 322     if (old == num) return;
 323
 324     g_message("Moving to desktop %d", num+1);
 325
 326     /* show windows before hiding the rest to lessen the enter/leave events */
 327
 328     /* show windows from top to bottom */
 329     for (it = stacking_list; it != NULL; it = it->next) {
 330         if (WINDOW_IS_CLIENT(it->data)) {
 331             Client *c = it->data;
 332             if (!c->frame->visible && client_should_show(c))
 333                 frame_show(c->frame);
 334         }
 335     }
 336
 337     /* hide windows from bottom to top */
 338     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 339         if (WINDOW_IS_CLIENT(it->data)) {
 340             Client *c = it->data;
 341             if (c->frame->visible && !client_should_show(c))
 342                 frame_hide(c->frame);
 343         }
 344     }
 345
 346     /* focus the last focused window on the desktop, and ignore enter events
 347        from the switch so it doesnt mess with the focus */
 348     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 349     g_message("switch fallback");
 350     focus_fallback(Fallback_Desktop);
 351     g_message("/switch fallback");
 352
 353     dispatch_ob(Event_Ob_Desktop, num, old);
 354 }
 355
 356 void screen_update_layout()
 357 {
 358     ObOrientation orient;
 359     ObCorner corner;
 360     guint rows;
 361     guint cols;
 362     guint32 *data;
 363     guint num;
 364     gboolean valid = FALSE;
 365
 366     if (PROP_GETA32(ob_root, net_desktop_layout, cardinal, &data, &num)) {
 367         if (num == 3 || num == 4) {
 368
 369             if (data[0] == prop_atoms.net_wm_orientation_vert)
 370                 orient = OB_ORIENTATION_VERT;
 371             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 372                 orient = OB_ORIENTATION_HORZ;
 373             else
 374                 goto screen_update_layout_bail;
 375
 376             if (num < 4)
 377                 corner = OB_CORNER_TOPLEFT;
 378             else {
 379                 if (data[3] == prop_atoms.net_wm_topright)
 380                     corner = OB_CORNER_TOPRIGHT;
 381                 else if (data[3] == prop_atoms.net_wm_bottomright)
 382                     corner = OB_CORNER_BOTTOMRIGHT;
 383                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 384                     corner = OB_CORNER_BOTTOMLEFT;
 385                 else
 386                     goto screen_update_layout_bail;
 387             }
 388
 389             /* fill in a zero rows/columns */
 390             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 391                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 392                 goto screen_update_layout_bail;
 393             } else {
 394                 if (data[1] == 0) {
 395                     data[1] = (screen_num_desktops +
 396                                screen_num_desktops % data[2]) / data[2];
 397                 } else if (data[2] == 0) {
 398                     data[2] = (screen_num_desktops +
 399                                screen_num_desktops % data[1]) / data[1];
 400                 }
 401                 cols = data[1];
 402                 rows = data[2];
 403             }
 404
 405             /* bounds checking */
 406             if (orient == OB_ORIENTATION_HORZ) {
 407                 rows = MIN(rows, screen_num_desktops);
 408                 cols = MIN(cols, ((screen_num_desktops +
 409                                      (screen_num_desktops % rows)) / rows));
 410             } else {
 411                 cols = MIN(cols, screen_num_desktops);
 412                 rows = MIN(rows, ((screen_num_desktops +
 413                                      (screen_num_desktops % cols)) / cols));
 414             }
 415
 416             valid = TRUE;
 417         }
 418     screen_update_layout_bail:
 419         g_free(data);
 420     }
 421
 422     if (!valid) {
 423         /* defaults */
 424         orient = OB_ORIENTATION_HORZ;
 425         corner = OB_CORNER_TOPLEFT;
 426         rows = 1;
 427         cols = screen_num_desktops;
 428     }
 429
 430     screen_desktop_layout.orientation = orient;
 431     screen_desktop_layout.start_corner = corner;
 432     screen_desktop_layout.rows = rows;
 433     screen_desktop_layout.columns = cols;
 434 }
 435
 436 void screen_update_desktop_names()
 437 {
 438     guint i;
 439
 440     /* empty the array */
 441     g_strfreev(screen_desktop_names);
 442     screen_desktop_names = NULL;
 443
 444     if (PROP_GETSS(ob_root, net_desktop_names, utf8, &screen_desktop_names))
 445         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 446     else
 447         i = 0;
 448     if (i <= screen_num_desktops) {
 449         screen_desktop_names = g_renew(char*, screen_desktop_names,
 450                                        screen_num_desktops + 1);
 451         screen_desktop_names[screen_num_desktops] = NULL;
 452         for (; i < screen_num_desktops; ++i)
 453             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 454     }
 455 }
 456
 457 void screen_show_desktop(gboolean show)
 458 {
 459     GList *it;
 460
 461     if (show == screen_showing_desktop) return; /* no change */
 462
 463     screen_showing_desktop = show;
 464
 465     if (show) {
 466         /* bottom to top */
 467         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 468             if (WINDOW_IS_CLIENT(it->data)) {
 469                 Client *client = it->data;
 470                 if (client->frame->visible && !client_should_show(client))
 471                     frame_hide(client->frame);
 472             }
 473         }
 474     } else {
 475         /* top to bottom */
 476         for (it = stacking_list; it != NULL; it = it->next) {
 477             if (WINDOW_IS_CLIENT(it->data)) {
 478                 Client *client = it->data;
 479                 if (!client->frame->visible && client_should_show(client))
 480                     frame_show(client->frame);
 481             }
 482         }
 483     }
 484
 485     if (show) {
 486         /* focus desktop */
 487         for (it = focus_order[screen_desktop]; it; it = it->next)
 488             if (((Client*)it->data)->type == Type_Desktop &&
 489                 client_focus(it->data))
 490                 break;
 491     } else {
 492         focus_fallback(Fallback_NoFocus);
 493     }
 494
 495     show = !!show; /* make it boolean */
 496     PROP_SET32(ob_root, net_showing_desktop, cardinal, show);
 497
 498     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
 499 }
 500
 501 void screen_install_colormap(Client *client, gboolean install)
 502 {
 503     XWindowAttributes wa;
 504
 505     if (client == NULL) {
 506         if (install)
 507             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 508         else
 509             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 510     } else {
 511         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 512             wa.colormap != None) {
 513             xerror_set_ignore(TRUE);
 514             if (install)
 515                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 516             else
 517                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 518             xerror_set_ignore(FALSE);
 519         }
 520     }
 521 }
 522
 523 void screen_update_areas()
 524 {
 525     guint i, x;
 526     guint32 *dims;
 527     Rect **old_area = area;
 528     Rect **rit;
 529     GList *it;
 530
 531     g_free(monitor_area);
 532     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 533
 534     if (area) {
 535         for (i = 0; area[i]; ++i)
 536             g_free(area[i]);
 537         g_free(area);
 538     }
 539
 540     area = g_new(Rect*, screen_num_desktops + 2);
 541     for (i = 0; i < screen_num_desktops + 1; ++i)
 542         area[i] = g_new(Rect, screen_num_monitors + 1);
 543     area[i] = NULL;
 544
 545     dims = g_new(guint32, 4 * screen_num_desktops);
 546
 547     rit = old_area;
 548     for (i = 0; i < screen_num_desktops + 1; ++i) {
 549         Strut s;
 550         int l, r, t, b;
 551
 552         /* calc the xinerama areas */
 553         for (x = 0; x < screen_num_monitors; ++x) {
 554             area[i][x] = monitor_area[x];
 555             if (x == 0) {
 556                 l = monitor_area[x].x;
 557                 t = monitor_area[x].y;
 558                 r = monitor_area[x].x + monitor_area[x].width - 1;
 559                 b = monitor_area[x].y + monitor_area[x].height - 1;
 560             } else {
 561                 l = MIN(l, monitor_area[x].x);
 562                 t = MIN(t, monitor_area[x].y);
 563                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 564                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 565             }
 566         }
 567         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 568
 569         /* apply struts */
 570         STRUT_SET(s, 0, 0, 0, 0);
 571         for (it = client_list; it; it = it->next)
 572             STRUT_ADD(s, ((Client*)it->data)->strut);
 573         STRUT_ADD(s, dock_strut);
 574
 575         if (s.left) {
 576             int o;
 577
 578             /* find the left-most xin heads, i do this in 2 loops :| */
 579             o = area[i][0].x;
 580             for (x = 1; x < screen_num_monitors; ++x)
 581                 o = MIN(o, area[i][x].x);
 582
 583             for (x = 0; x < screen_num_monitors; ++x) {
 584                 int edge = o + s.left - area[i][x].x;
 585                 if (edge > 0) {
 586                     area[i][x].x += edge;
 587                     area[i][x].width -= edge;
 588                 }
 589             }
 590
 591             area[i][screen_num_monitors].x += s.left;
 592             area[i][screen_num_monitors].width -= s.left;
 593         }
 594         if (s.top) {
 595             int o;
 596
 597             /* find the left-most xin heads, i do this in 2 loops :| */
 598             o = area[i][0].y;
 599             for (x = 1; x < screen_num_monitors; ++x)
 600                 o = MIN(o, area[i][x].y);
 601
 602             for (x = 0; x < screen_num_monitors; ++x) {
 603                 int edge = o + s.top - area[i][x].y;
 604                 if (edge > 0) {
 605                     area[i][x].y += edge;
 606                     area[i][x].height -= edge;
 607                 }
 608             }
 609
 610             area[i][screen_num_monitors].y += s.top;
 611             area[i][screen_num_monitors].height -= s.top;
 612         }
 613         if (s.right) {
 614             int o;
 615
 616             /* find the bottom-most xin heads, i do this in 2 loops :| */
 617             o = area[i][0].x + area[i][0].width - 1;
 618             for (x = 1; x < screen_num_monitors; ++x)
 619                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 620
 621             for (x = 0; x < screen_num_monitors; ++x) {
 622                 int edge = (area[i][x].x + area[i][x].width - 1) -
 623                     (o - s.right);
 624                 if (edge > 0)
 625                     area[i][x].width -= edge;
 626             }
 627
 628             area[i][screen_num_monitors].width -= s.right;
 629         }
 630         if (s.bottom) {
 631             int o;
 632
 633             /* find the bottom-most xin heads, i do this in 2 loops :| */
 634             o = area[i][0].y + area[i][0].height - 1;
 635             for (x = 1; x < screen_num_monitors; ++x)
 636                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 637
 638             for (x = 0; x < screen_num_monitors; ++x) {
 639                 int edge = (area[i][x].y + area[i][x].height - 1) -
 640                     (o - s.bottom);
 641                 if (edge > 0)
 642                     area[i][x].height -= edge;
 643             }
 644
 645             area[i][screen_num_monitors].height -= s.bottom;
 646         }
 647
 648         /* XXX when dealing with partial struts, if its in a single
 649            xinerama area, then only subtract it from that area's space
 650         for (x = 0; x < screen_num_monitors; ++x) {
 651             GList *it;
 652
 653
 654                do something smart with it for the 'all xinerama areas' one...
 655
 656             for (it = client_list; it; it = it->next) {
 657
 658                 XXX if gunna test this shit, then gotta worry about when
 659                 the client moves between xinerama heads..
 660
 661                 if (RECT_CONTAINS_RECT(((Client*)it->data)->frame->area,
 662                                        area[i][x])) {
 663
 664                 }
 665             }
 666         }
 667         */
 668
 669         /* XXX optimize when this is run? */
 670
 671         /* the area has changed, adjust all the maximized
 672            windows */
 673         for (it = client_list; it; it = it->next) {
 674             Client *c = it->data;
 675             if (i < screen_num_desktops) {
 676                 if (c->desktop == i)
 677                     client_reconfigure(c);
 678             } else if (c->desktop == DESKTOP_ALL)
 679                 client_reconfigure(c);
 680         }
 681         if (i < screen_num_desktops) {
 682             /* don't set these for the 'all desktops' area */
 683             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
 684             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
 685             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
 686             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
 687         }
 688     }
 689     PROP_SETA32(ob_root, net_workarea, cardinal,
 690                 dims, 4 * screen_num_desktops);
 691
 692     g_free(dims);
 693 }
 694
 695 Rect *screen_area(guint desktop)
 696 {
 697     return screen_area_monitor(desktop, screen_num_monitors);
 698 }
 699
 700 Rect *screen_area_monitor(guint desktop, guint head)
 701 {
 702     if (head > screen_num_monitors)
 703         return NULL;
 704     if (desktop >= screen_num_desktops) {
 705         if (desktop == DESKTOP_ALL)
 706             return &area[screen_num_desktops][head];
 707         return NULL;
 708     }
 709     return &area[desktop][head];
 710 }
 711
 712 Rect *screen_physical_area()
 713 {
 714     return screen_physical_area_monitor(screen_num_monitors);
 715 }
 716
 717 Rect *screen_physical_area_monitor(guint head)
 718 {
 719     if (head > screen_num_monitors)
 720         return NULL;
 721     return &monitor_area[head];
 722 }
 723
 724 static void set_root_cursor()
 725 {
 726 #ifdef USE_LIBSN
 727         if (sn_busy_cnt)
 728             XDefineCursor(ob_display, ob_root, ob_cursor(OB_CURSOR_BUSY));
 729         else
 730 #endif
 731             XDefineCursor(ob_display, ob_root, ob_cursor(OB_CURSOR_POINTER));
 732 }
 733
 734 #ifdef USE_LIBSN
 735 static void sn_timeout(void *data)
 736 {
 737     timer_stop(sn_timer);
 738     sn_timer = NULL;
 739     sn_busy_cnt = 0;
 740
 741     set_root_cursor();
 742 }
 743
 744 static void sn_event_func(SnMonitorEvent *ev, void *data)
 745 {
 746     SnStartupSequence *seq;
 747     const char *seq_id, *bin_name;
 748     int cnt = sn_busy_cnt;
 749
 750     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
 751         return;
 752
 753     seq_id = sn_startup_sequence_get_id(seq);
 754     bin_name = sn_startup_sequence_get_binary_name(seq);
 755
 756     if (!(seq_id && bin_name))
 757         return;
 758
 759     switch (sn_monitor_event_get_type(ev)) {
 760     case SN_MONITOR_EVENT_INITIATED:
 761         ++sn_busy_cnt;
 762         if (sn_timer)
 763             timer_stop(sn_timer);
 764         /* 30 second timeout for apps to start */
 765         sn_timer = timer_start(30 * 1000000, sn_timeout, NULL);
 766         break;
 767     case SN_MONITOR_EVENT_CHANGED:
 768         break;
 769     case SN_MONITOR_EVENT_COMPLETED:
 770         if (sn_busy_cnt) --sn_busy_cnt;
 771         if (sn_timer) {
 772             timer_stop(sn_timer);
 773             sn_timer = NULL;
 774         }
 775         break;
 776     case SN_MONITOR_EVENT_CANCELED:
 777         if (sn_busy_cnt) --sn_busy_cnt;
 778         if (sn_timer) {
 779             timer_stop(sn_timer);
 780             sn_timer = NULL;
 781         }
 782     };
 783
 784     if (sn_busy_cnt != cnt)
 785         set_root_cursor();
 786 }
 787 #endif