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;
  34 guint    screen_num_monitors;
  35 guint    screen_desktop;
  36 Size     screen_physical_size;
  37 gboolean screen_showing_desktop;
  38 DesktopLayout screen_desktop_layout;
  39 char   **screen_desktop_names;
  40 Window   screen_support_win;
  41
  42 static Rect  **area; /* array of desktop holding array of xinerama areas */
  43 static Rect  *monitor_area;
  44
  45 #ifdef USE_LIBSN
  46 static SnMonitorContext *sn_context;
  47 static int sn_busy_cnt;
  48 static ObTimer *sn_timer;
  49
  50 static void sn_event_func(SnMonitorEvent *event, void *data);
  51 #endif
  52
  53 static void set_root_cursor();
  54
  55 gboolean screen_annex()
  56 {
  57     XSetWindowAttributes attrib;
  58     pid_t pid;
  59     gint i, num_support;
  60     guint32 *supported;
  61
  62     xerror_set_ignore(TRUE);
  63     xerror_occured = FALSE;
  64     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
  65                  ROOT_EVENTMASK);
  66     xerror_set_ignore(FALSE);
  67     if (xerror_occured) {
  68         g_message("A window manager is already running on screen %d",
  69                   ob_screen);
  70         return FALSE;
  71     }
  72
  73
  74     g_message("Managing screen %d", ob_screen);
  75
  76     set_root_cursor();
  77
  78     /* set the OPENBOX_PID hint */
  79     pid = getpid();
  80     PROP_SET32(RootWindow(ob_display, ob_screen),
  81                openbox_pid, cardinal, pid);
  82
  83     /* create the netwm support window */
  84     attrib.override_redirect = TRUE;
  85     screen_support_win = XCreateWindow(ob_display,
  86                                        RootWindow(ob_display, ob_screen),
  87                                        -100, -100, 1, 1, 0,
  88                                        CopyFromParent, InputOutput,
  89                                        CopyFromParent,
  90                                        CWOverrideRedirect, &attrib);
  91     XMapRaised(ob_display, screen_support_win);
  92
  93     /* set supporting window */
  94     PROP_SET32(RootWindow(ob_display, ob_screen),
  95                net_supporting_wm_check, window, screen_support_win);
  96
  97     /* set properties on the supporting window */
  98     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
  99     PROP_SET32(screen_support_win, net_supporting_wm_check,
 100                window, screen_support_win);
 101
 102     /* set the _NET_SUPPORTED_ATOMS hint */
 103     num_support = 61;
 104     i = 0;
 105     supported = g_new(guint32, num_support);
 106     supported[i++] = prop_atoms.net_current_desktop;
 107     supported[i++] = prop_atoms.net_number_of_desktops;
 108     supported[i++] = prop_atoms.net_desktop_geometry;
 109     supported[i++] = prop_atoms.net_desktop_viewport;
 110     supported[i++] = prop_atoms.net_active_window;
 111     supported[i++] = prop_atoms.net_workarea;
 112     supported[i++] = prop_atoms.net_client_list;
 113     supported[i++] = prop_atoms.net_client_list_stacking;
 114     supported[i++] = prop_atoms.net_desktop_names;
 115     supported[i++] = prop_atoms.net_close_window;
 116     supported[i++] = prop_atoms.net_desktop_layout;
 117     supported[i++] = prop_atoms.net_showing_desktop;
 118     supported[i++] = prop_atoms.net_wm_name;
 119     supported[i++] = prop_atoms.net_wm_visible_name;
 120     supported[i++] = prop_atoms.net_wm_icon_name;
 121     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 122     supported[i++] = prop_atoms.net_wm_desktop;
 123     supported[i++] = prop_atoms.net_wm_strut;
 124     supported[i++] = prop_atoms.net_wm_window_type;
 125     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 126     supported[i++] = prop_atoms.net_wm_window_type_dock;
 127     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 128     supported[i++] = prop_atoms.net_wm_window_type_menu;
 129     supported[i++] = prop_atoms.net_wm_window_type_utility;
 130     supported[i++] = prop_atoms.net_wm_window_type_splash;
 131     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 132     supported[i++] = prop_atoms.net_wm_window_type_normal;
 133     supported[i++] = prop_atoms.net_wm_allowed_actions;
 134     supported[i++] = prop_atoms.net_wm_action_move;
 135     supported[i++] = prop_atoms.net_wm_action_resize;
 136     supported[i++] = prop_atoms.net_wm_action_minimize;
 137     supported[i++] = prop_atoms.net_wm_action_shade;
 138     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 139     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 140     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 141     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 142     supported[i++] = prop_atoms.net_wm_action_close;
 143     supported[i++] = prop_atoms.net_wm_state;
 144     supported[i++] = prop_atoms.net_wm_state_modal;
 145     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 146     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 147     supported[i++] = prop_atoms.net_wm_state_shaded;
 148     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 149     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 150     supported[i++] = prop_atoms.net_wm_state_hidden;
 151     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 152     supported[i++] = prop_atoms.net_wm_state_above;
 153     supported[i++] = prop_atoms.net_wm_state_below;
 154     supported[i++] = prop_atoms.net_moveresize_window;
 155     supported[i++] = prop_atoms.net_wm_moveresize;
 156     supported[i++] = prop_atoms.net_wm_moveresize_size_topleft;
 157     supported[i++] = prop_atoms.net_wm_moveresize_size_top;
 158     supported[i++] = prop_atoms.net_wm_moveresize_size_topright;
 159     supported[i++] = prop_atoms.net_wm_moveresize_size_right;
 160     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomright;
 161     supported[i++] = prop_atoms.net_wm_moveresize_size_bottom;
 162     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomleft;
 163     supported[i++] = prop_atoms.net_wm_moveresize_size_left;
 164     supported[i++] = prop_atoms.net_wm_moveresize_move;
 165     supported[i++] = prop_atoms.net_wm_moveresize_size_keyboard;
 166     supported[i++] = prop_atoms.net_wm_moveresize_move_keyboard;
 167     g_assert(i == num_support);
 168 /*
 169   supported[] = prop_atoms.net_wm_action_stick;
 170 */
 171
 172     PROP_SETA32(RootWindow(ob_display, ob_screen),
 173                 net_supported, atom, supported, num_support);
 174     g_free(supported);
 175
 176     return TRUE;
 177 }
 178
 179 void screen_startup()
 180 {
 181     GSList *it;
 182     guint i;
 183
 184     /* get the initial size */
 185     screen_resize();
 186
 187     /* set the names */
 188     screen_desktop_names = g_new(char*,
 189                                  g_slist_length(config_desktops_names) + 1);
 190     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 191         screen_desktop_names[i] = it->data; /* dont strdup */
 192     screen_desktop_names[i] = NULL;
 193     PROP_SETSS(RootWindow(ob_display, ob_screen),
 194                net_desktop_names, screen_desktop_names);
 195     g_free(screen_desktop_names); /* dont free the individual strings */
 196     screen_desktop_names = NULL;
 197
 198     screen_num_desktops = 0;
 199     screen_set_num_desktops(config_desktops_num);
 200     if (startup_desktop >= screen_num_desktops)
 201         startup_desktop = 0;
 202     screen_desktop = startup_desktop;
 203     screen_set_desktop(startup_desktop);
 204
 205     /* don't start in showing-desktop mode */
 206     screen_showing_desktop = FALSE;
 207     PROP_SET32(RootWindow(ob_display, ob_screen),
 208                net_showing_desktop, cardinal, screen_showing_desktop);
 209
 210     screen_update_layout();
 211
 212 #ifdef USE_LIBSN
 213     sn_context = sn_monitor_context_new(ob_sn_display, ob_screen,
 214                                         sn_event_func, NULL, NULL);
 215     sn_busy_cnt = 0;
 216 #endif
 217 }
 218
 219 void screen_shutdown()
 220 {
 221     Rect **r;
 222
 223     XSelectInput(ob_display, RootWindow(ob_display, ob_screen), NoEventMask);
 224
 225     /* we're not running here no more! */
 226     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 227     /* not without us */
 228     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 229     /* don't keep this mode */
 230     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 231
 232     XDestroyWindow(ob_display, screen_support_win);
 233
 234     g_strfreev(screen_desktop_names);
 235     for (r = area; *r; ++r)
 236         g_free(*r);
 237     g_free(area);
 238 }
 239
 240 void screen_resize()
 241 {
 242     static int oldw = 0, oldh = 0;
 243     int w, h;
 244     GList *it;
 245     guint32 geometry[2];
 246
 247     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 248     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 249
 250     if (w == oldw && h == oldh) return;
 251
 252     oldw = w; oldh = h;
 253
 254     /* Set the _NET_DESKTOP_GEOMETRY hint */
 255     screen_physical_size.width = geometry[0] = w;
 256     screen_physical_size.height = geometry[1] = h;
 257     PROP_SETA32(RootWindow(ob_display, ob_screen),
 258                 net_desktop_geometry, cardinal, geometry, 2);
 259
 260     if (ob_state == OB_STATE_STARTING)
 261         return;
 262
 263     dock_configure();
 264     screen_update_areas();
 265
 266     for (it = client_list; it; it = it->next)
 267         client_move_onscreen(it->data);
 268 }
 269
 270 void screen_set_num_desktops(guint num)
 271 {
 272     guint i, old;
 273     guint32 *viewport;
 274     GList *it;
 275
 276     g_assert(num > 0);
 277
 278     old = screen_num_desktops;
 279     screen_num_desktops = num;
 280     PROP_SET32(RootWindow(ob_display, ob_screen),
 281                net_number_of_desktops, cardinal, num);
 282
 283     /* set the viewport hint */
 284     viewport = g_new0(guint32, num * 2);
 285     PROP_SETA32(RootWindow(ob_display, ob_screen),
 286                 net_desktop_viewport, cardinal, viewport, num * 2);
 287     g_free(viewport);
 288
 289     /* the number of rows/columns will differ */
 290     screen_update_layout();
 291
 292     /* may be some unnamed desktops that we need to fill in with names */
 293     screen_update_desktop_names();
 294
 295     /* update the focus lists */
 296     /* free our lists for the desktops which have disappeared */
 297     for (i = num; i < old; ++i)
 298         g_list_free(focus_order[i]);
 299     /* realloc the array */
 300     focus_order = g_renew(GList*, focus_order, num);
 301     /* set the new lists to be empty */
 302     for (i = old; i < num; ++i)
 303         focus_order[i] = NULL;
 304
 305     /* move windows on desktops that will no longer exist! */
 306     for (it = client_list; it != NULL; it = it->next) {
 307         ObClient *c = it->data;
 308         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 309             client_set_desktop(c, num - 1, FALSE);
 310     }
 311
 312     /* change our struts/area to match (after moving windows) */
 313     screen_update_areas();
 314
 315     dispatch_ob(Event_Ob_NumDesktops, num, old);
 316
 317     /* change our desktop if we're on one that no longer exists! */
 318     if (screen_desktop >= screen_num_desktops)
 319         screen_set_desktop(num - 1);
 320 }
 321
 322 void screen_set_desktop(guint num)
 323 {
 324     GList *it;
 325     guint old;
 326     XEvent e;
 327
 328     g_assert(num < screen_num_desktops);
 329
 330     old = screen_desktop;
 331     screen_desktop = num;
 332     PROP_SET32(RootWindow(ob_display, ob_screen),
 333                net_current_desktop, cardinal, num);
 334
 335     if (old == num) return;
 336
 337     g_message("Moving to desktop %d", num+1);
 338
 339     /* show windows before hiding the rest to lessen the enter/leave events */
 340
 341     /* show windows from top to bottom */
 342     for (it = stacking_list; it != NULL; it = it->next) {
 343         if (WINDOW_IS_CLIENT(it->data)) {
 344             ObClient *c = it->data;
 345             if (!c->frame->visible && client_should_show(c))
 346                 frame_show(c->frame);
 347         }
 348     }
 349
 350     /* hide windows from bottom to top */
 351     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 352         if (WINDOW_IS_CLIENT(it->data)) {
 353             ObClient *c = it->data;
 354             if (c->frame->visible && !client_should_show(c))
 355                 frame_hide(c->frame);
 356         }
 357     }
 358
 359     /* focus the last focused window on the desktop, and ignore enter events
 360        from the switch so it doesnt mess with the focus */
 361     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 362 #ifdef DEBUG_FOCUS
 363     g_message("switch fallback");
 364 #endif
 365     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 366 #ifdef DEBUG_FOCUS
 367     g_message("/switch fallback");
 368 #endif
 369
 370     dispatch_ob(Event_Ob_Desktop, num, old);
 371 }
 372
 373 void screen_update_layout()
 374 {
 375     ObOrientation orient;
 376     ObCorner corner;
 377     guint rows;
 378     guint cols;
 379     guint32 *data;
 380     guint num;
 381     gboolean valid = FALSE;
 382
 383     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 384                     net_desktop_layout, cardinal, &data, &num)) {
 385         if (num == 3 || num == 4) {
 386
 387             if (data[0] == prop_atoms.net_wm_orientation_vert)
 388                 orient = OB_ORIENTATION_VERT;
 389             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 390                 orient = OB_ORIENTATION_HORZ;
 391             else
 392                 goto screen_update_layout_bail;
 393
 394             if (num < 4)
 395                 corner = OB_CORNER_TOPLEFT;
 396             else {
 397                 if (data[3] == prop_atoms.net_wm_topright)
 398                     corner = OB_CORNER_TOPRIGHT;
 399                 else if (data[3] == prop_atoms.net_wm_bottomright)
 400                     corner = OB_CORNER_BOTTOMRIGHT;
 401                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 402                     corner = OB_CORNER_BOTTOMLEFT;
 403                 else
 404                     goto screen_update_layout_bail;
 405             }
 406
 407             /* fill in a zero rows/columns */
 408             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 409                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 410                 goto screen_update_layout_bail;
 411             } else {
 412                 if (data[1] == 0) {
 413                     data[1] = (screen_num_desktops +
 414                                screen_num_desktops % data[2]) / data[2];
 415                 } else if (data[2] == 0) {
 416                     data[2] = (screen_num_desktops +
 417                                screen_num_desktops % data[1]) / data[1];
 418                 }
 419                 cols = data[1];
 420                 rows = data[2];
 421             }
 422
 423             /* bounds checking */
 424             if (orient == OB_ORIENTATION_HORZ) {
 425                 rows = MIN(rows, screen_num_desktops);
 426                 cols = MIN(cols, ((screen_num_desktops +
 427                                      (screen_num_desktops % rows)) / rows));
 428             } else {
 429                 cols = MIN(cols, screen_num_desktops);
 430                 rows = MIN(rows, ((screen_num_desktops +
 431                                      (screen_num_desktops % cols)) / cols));
 432             }
 433
 434             valid = TRUE;
 435         }
 436     screen_update_layout_bail:
 437         g_free(data);
 438     }
 439
 440     if (!valid) {
 441         /* defaults */
 442         orient = OB_ORIENTATION_HORZ;
 443         corner = OB_CORNER_TOPLEFT;
 444         rows = 1;
 445         cols = screen_num_desktops;
 446     }
 447
 448     screen_desktop_layout.orientation = orient;
 449     screen_desktop_layout.start_corner = corner;
 450     screen_desktop_layout.rows = rows;
 451     screen_desktop_layout.columns = cols;
 452 }
 453
 454 void screen_update_desktop_names()
 455 {
 456     guint i;
 457
 458     /* empty the array */
 459     g_strfreev(screen_desktop_names);
 460     screen_desktop_names = NULL;
 461
 462     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 463                    net_desktop_names, utf8, &screen_desktop_names))
 464         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 465     else
 466         i = 0;
 467     if (i <= screen_num_desktops) {
 468         screen_desktop_names = g_renew(char*, screen_desktop_names,
 469                                        screen_num_desktops + 1);
 470         screen_desktop_names[screen_num_desktops] = NULL;
 471         for (; i < screen_num_desktops; ++i)
 472             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 473     }
 474 }
 475
 476 void screen_show_desktop(gboolean show)
 477 {
 478     GList *it;
 479
 480     if (show == screen_showing_desktop) return; /* no change */
 481
 482     screen_showing_desktop = show;
 483
 484     if (show) {
 485         /* bottom to top */
 486         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 487             if (WINDOW_IS_CLIENT(it->data)) {
 488                 ObClient *client = it->data;
 489                 if (client->frame->visible && !client_should_show(client))
 490                     frame_hide(client->frame);
 491             }
 492         }
 493     } else {
 494         /* top to bottom */
 495         for (it = stacking_list; it != NULL; it = it->next) {
 496             if (WINDOW_IS_CLIENT(it->data)) {
 497                 ObClient *client = it->data;
 498                 if (!client->frame->visible && client_should_show(client))
 499                     frame_show(client->frame);
 500             }
 501         }
 502     }
 503
 504     if (show) {
 505         /* focus desktop */
 506         for (it = focus_order[screen_desktop]; it; it = it->next)
 507             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 508                 client_focus(it->data))
 509                 break;
 510     } else {
 511         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 512     }
 513
 514     show = !!show; /* make it boolean */
 515     PROP_SET32(RootWindow(ob_display, ob_screen),
 516                net_showing_desktop, cardinal, show);
 517
 518     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
 519 }
 520
 521 void screen_install_colormap(ObClient *client, gboolean install)
 522 {
 523     XWindowAttributes wa;
 524
 525     if (client == NULL) {
 526         if (install)
 527             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 528         else
 529             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 530     } else {
 531         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 532             wa.colormap != None) {
 533             xerror_set_ignore(TRUE);
 534             if (install)
 535                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 536             else
 537                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 538             xerror_set_ignore(FALSE);
 539         }
 540     }
 541 }
 542
 543 void screen_update_areas()
 544 {
 545     guint i, x;
 546     guint32 *dims;
 547     Rect **old_area = area;
 548     Rect **rit;
 549     GList *it;
 550
 551     g_free(monitor_area);
 552     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 553
 554     if (area) {
 555         for (i = 0; area[i]; ++i)
 556             g_free(area[i]);
 557         g_free(area);
 558     }
 559
 560     area = g_new(Rect*, screen_num_desktops + 2);
 561     for (i = 0; i < screen_num_desktops + 1; ++i)
 562         area[i] = g_new(Rect, screen_num_monitors + 1);
 563     area[i] = NULL;
 564
 565     dims = g_new(guint32, 4 * screen_num_desktops);
 566
 567     rit = old_area;
 568     for (i = 0; i < screen_num_desktops + 1; ++i) {
 569         Strut s;
 570         int l, r, t, b;
 571
 572         /* calc the xinerama areas */
 573         for (x = 0; x < screen_num_monitors; ++x) {
 574             area[i][x] = monitor_area[x];
 575             if (x == 0) {
 576                 l = monitor_area[x].x;
 577                 t = monitor_area[x].y;
 578                 r = monitor_area[x].x + monitor_area[x].width - 1;
 579                 b = monitor_area[x].y + monitor_area[x].height - 1;
 580             } else {
 581                 l = MIN(l, monitor_area[x].x);
 582                 t = MIN(t, monitor_area[x].y);
 583                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 584                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 585             }
 586         }
 587         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 588
 589         /* apply struts */
 590         STRUT_SET(s, 0, 0, 0, 0);
 591         for (it = client_list; it; it = it->next)
 592             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 593         STRUT_ADD(s, dock_strut);
 594
 595         if (s.left) {
 596             int o;
 597
 598             /* find the left-most xin heads, i do this in 2 loops :| */
 599             o = area[i][0].x;
 600             for (x = 1; x < screen_num_monitors; ++x)
 601                 o = MIN(o, area[i][x].x);
 602
 603             for (x = 0; x < screen_num_monitors; ++x) {
 604                 int edge = o + s.left - area[i][x].x;
 605                 if (edge > 0) {
 606                     area[i][x].x += edge;
 607                     area[i][x].width -= edge;
 608                 }
 609             }
 610
 611             area[i][screen_num_monitors].x += s.left;
 612             area[i][screen_num_monitors].width -= s.left;
 613         }
 614         if (s.top) {
 615             int o;
 616
 617             /* find the left-most xin heads, i do this in 2 loops :| */
 618             o = area[i][0].y;
 619             for (x = 1; x < screen_num_monitors; ++x)
 620                 o = MIN(o, area[i][x].y);
 621
 622             for (x = 0; x < screen_num_monitors; ++x) {
 623                 int edge = o + s.top - area[i][x].y;
 624                 if (edge > 0) {
 625                     area[i][x].y += edge;
 626                     area[i][x].height -= edge;
 627                 }
 628             }
 629
 630             area[i][screen_num_monitors].y += s.top;
 631             area[i][screen_num_monitors].height -= s.top;
 632         }
 633         if (s.right) {
 634             int o;
 635
 636             /* find the bottom-most xin heads, i do this in 2 loops :| */
 637             o = area[i][0].x + area[i][0].width - 1;
 638             for (x = 1; x < screen_num_monitors; ++x)
 639                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 640
 641             for (x = 0; x < screen_num_monitors; ++x) {
 642                 int edge = (area[i][x].x + area[i][x].width - 1) -
 643                     (o - s.right);
 644                 if (edge > 0)
 645                     area[i][x].width -= edge;
 646             }
 647
 648             area[i][screen_num_monitors].width -= s.right;
 649         }
 650         if (s.bottom) {
 651             int o;
 652
 653             /* find the bottom-most xin heads, i do this in 2 loops :| */
 654             o = area[i][0].y + area[i][0].height - 1;
 655             for (x = 1; x < screen_num_monitors; ++x)
 656                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 657
 658             for (x = 0; x < screen_num_monitors; ++x) {
 659                 int edge = (area[i][x].y + area[i][x].height - 1) -
 660                     (o - s.bottom);
 661                 if (edge > 0)
 662                     area[i][x].height -= edge;
 663             }
 664
 665             area[i][screen_num_monitors].height -= s.bottom;
 666         }
 667
 668         /* XXX when dealing with partial struts, if its in a single
 669            xinerama area, then only subtract it from that area's space
 670         for (x = 0; x < screen_num_monitors; ++x) {
 671             GList *it;
 672
 673
 674                do something smart with it for the 'all xinerama areas' one...
 675
 676             for (it = client_list; it; it = it->next) {
 677
 678                 XXX if gunna test this shit, then gotta worry about when
 679                 the client moves between xinerama heads..
 680
 681                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
 682                                        area[i][x])) {
 683
 684                 }
 685             }
 686         }
 687         */
 688
 689         /* XXX optimize when this is run? */
 690
 691         /* the area has changed, adjust all the maximized
 692            windows */
 693         for (it = client_list; it; it = it->next) {
 694             ObClient *c = it->data;
 695             if (i < screen_num_desktops) {
 696                 if (c->desktop == i)
 697                     client_reconfigure(c);
 698             } else if (c->desktop == DESKTOP_ALL)
 699                 client_reconfigure(c);
 700         }
 701         if (i < screen_num_desktops) {
 702             /* don't set these for the 'all desktops' area */
 703             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
 704             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
 705             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
 706             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
 707         }
 708     }
 709     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
 710                 dims, 4 * screen_num_desktops);
 711
 712     g_free(dims);
 713 }
 714
 715 Rect *screen_area(guint desktop)
 716 {
 717     return screen_area_monitor(desktop, screen_num_monitors);
 718 }
 719
 720 Rect *screen_area_monitor(guint desktop, guint head)
 721 {
 722     if (head > screen_num_monitors)
 723         return NULL;
 724     if (desktop >= screen_num_desktops) {
 725         if (desktop == DESKTOP_ALL)
 726             return &area[screen_num_desktops][head];
 727         return NULL;
 728     }
 729     return &area[desktop][head];
 730 }
 731
 732 Rect *screen_physical_area()
 733 {
 734     return screen_physical_area_monitor(screen_num_monitors);
 735 }
 736
 737 Rect *screen_physical_area_monitor(guint head)
 738 {
 739     if (head > screen_num_monitors)
 740         return NULL;
 741     return &monitor_area[head];
 742 }
 743
 744 static void set_root_cursor()
 745 {
 746 #ifdef USE_LIBSN
 747         if (sn_busy_cnt)
 748             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
 749                           ob_cursor(OB_CURSOR_BUSY));
 750         else
 751 #endif
 752             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
 753                           ob_cursor(OB_CURSOR_POINTER));
 754 }
 755
 756 #ifdef USE_LIBSN
 757 static void sn_timeout(void *data)
 758 {
 759     timer_stop(sn_timer);
 760     sn_timer = NULL;
 761     sn_busy_cnt = 0;
 762
 763     set_root_cursor();
 764 }
 765
 766 static void sn_event_func(SnMonitorEvent *ev, void *data)
 767 {
 768     SnStartupSequence *seq;
 769     const char *seq_id, *bin_name;
 770     int cnt = sn_busy_cnt;
 771
 772     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
 773         return;
 774
 775     seq_id = sn_startup_sequence_get_id(seq);
 776     bin_name = sn_startup_sequence_get_binary_name(seq);
 777
 778     if (!(seq_id && bin_name))
 779         return;
 780
 781     switch (sn_monitor_event_get_type(ev)) {
 782     case SN_MONITOR_EVENT_INITIATED:
 783         ++sn_busy_cnt;
 784         if (sn_timer)
 785             timer_stop(sn_timer);
 786         /* 30 second timeout for apps to start */
 787         sn_timer = timer_start(30 * 1000000, sn_timeout, NULL);
 788         break;
 789     case SN_MONITOR_EVENT_CHANGED:
 790         break;
 791     case SN_MONITOR_EVENT_COMPLETED:
 792         if (sn_busy_cnt) --sn_busy_cnt;
 793         if (sn_timer) {
 794             timer_stop(sn_timer);
 795             sn_timer = NULL;
 796         }
 797         break;
 798     case SN_MONITOR_EVENT_CANCELED:
 799         if (sn_busy_cnt) --sn_busy_cnt;
 800         if (sn_timer) {
 801             timer_stop(sn_timer);
 802             sn_timer = NULL;
 803         }
 804     };
 805
 806     if (sn_busy_cnt != cnt)
 807         set_root_cursor();
 808 }
 809 #endif