openbox/screen.c

   1 #include "debug.h"
   2 #include "openbox.h"
   3 #include "dock.h"
   4 #include "xerror.h"
   5 #include "prop.h"
   6 #include "startup.h"
   7 #include "timer.h"
   8 #include "config.h"
   9 #include "screen.h"
  10 #include "client.h"
  11 #include "frame.h"
  12 #include "focus.h"
  13 #include "dispatch.h"
  14 #include "extensions.h"
  15 #include "render/render.h"
  16
  17 #ifdef USE_LIBSN
  18 #  define SN_API_NOT_YET_FROZEN
  19 #  include <libsn/sn.h>
  20 #endif
  21
  22 #include <X11/Xlib.h>
  23 #ifdef HAVE_UNISTD_H
  24 #  include <sys/types.h>
  25 #  include <unistd.h>
  26 #endif
  27
  28 /*! The event mask to grab on the root window */
  29 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  30                         EnterWindowMask | LeaveWindowMask | \
  31                         SubstructureNotifyMask | SubstructureRedirectMask | \
  32                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  33
  34 guint    screen_num_desktops;
  35 guint    screen_num_monitors;
  36 guint    screen_desktop;
  37 Size     screen_physical_size;
  38 gboolean screen_showing_desktop;
  39 DesktopLayout screen_desktop_layout;
  40 char   **screen_desktop_names;
  41 Window   screen_support_win;
  42
  43 static Rect  **area; /* array of desktop holding array of xinerama areas */
  44 static Rect  *monitor_area;
  45
  46 #ifdef USE_LIBSN
  47 static SnMonitorContext *sn_context;
  48 static int sn_busy_cnt;
  49 static ObTimer *sn_timer;
  50
  51 static void sn_event_func(SnMonitorEvent *event, void *data);
  52 #endif
  53
  54 static void set_root_cursor();
  55
  56 static gboolean replace_wm()
  57 {
  58     char *wm_sn;
  59     Atom wm_sn_atom;
  60     Window current_wm_sn_owner;
  61     Time timestamp;
  62
  63     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  64     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  65
  66     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  67     if (current_wm_sn_owner) {
  68         if (!ob_replace_wm) {
  69             g_warning("A window manager is already running on screen %d",
  70                       ob_screen);
  71             return FALSE;
  72         }
  73         xerror_set_ignore(TRUE);
  74         xerror_occured = FALSE;
  75
  76         /* We want to find out when the current selection owner dies */
  77         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  78         XSync(ob_display, FALSE);
  79
  80         xerror_set_ignore(FALSE);
  81         if (xerror_occured)
  82             current_wm_sn_owner = None;
  83     }
  84
  85     {
  86         /* Generate a timestamp */
  87         XEvent event;
  88
  89         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
  90
  91         XChangeProperty(ob_display, screen_support_win,
  92                         prop_atoms.wm_class, prop_atoms.string,
  93                         8, PropModeAppend, NULL, 0);
  94         XWindowEvent(ob_display, screen_support_win,
  95                      PropertyChangeMask, &event);
  96
  97         XSelectInput(ob_display, screen_support_win, NoEventMask);
  98
  99         timestamp = event.xproperty.time;
 100     }
 101
 102     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 103                        timestamp);
 104
 105     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 106         g_warning("Could not acquire window manager selection on screen %d",
 107                   ob_screen);
 108         return FALSE;
 109     }
 110
 111     /* Wait for old window manager to go away */
 112     if (current_wm_sn_owner) {
 113       XEvent event;
 114       gulong wait = 0;
 115       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 116
 117       while (wait < timeout) {
 118           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 119                                 StructureNotifyMask, &event) &&
 120               event.type == DestroyNotify)
 121               break;
 122           g_usleep(G_USEC_PER_SEC / 10);
 123           wait += G_USEC_PER_SEC / 10;
 124       }
 125
 126       if (wait >= timeout) {
 127           g_warning("Timeout expired while waiting for the current WM to die "
 128                     "on screen %d", ob_screen);
 129           return FALSE;
 130       }
 131     }
 132
 133     /* Send client message indicating that we are now the WM */
 134     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 135                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 136
 137
 138     return TRUE;
 139 }
 140
 141 gboolean screen_annex()
 142 {
 143     XSetWindowAttributes attrib;
 144     pid_t pid;
 145     gint i, num_support;
 146     guint32 *supported;
 147
 148     /* create the netwm support window */
 149     attrib.override_redirect = TRUE;
 150     screen_support_win = XCreateWindow(ob_display,
 151                                        RootWindow(ob_display, ob_screen),
 152                                        -100, -100, 1, 1, 0,
 153                                        CopyFromParent, InputOutput,
 154                                        CopyFromParent,
 155                                        CWOverrideRedirect, &attrib);
 156     XMapRaised(ob_display, screen_support_win);
 157
 158     if (!replace_wm()) {
 159         XDestroyWindow(ob_display, screen_support_win);
 160         return FALSE;
 161     }
 162
 163     xerror_set_ignore(TRUE);
 164     xerror_occured = FALSE;
 165     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 166                  ROOT_EVENTMASK);
 167     xerror_set_ignore(FALSE);
 168     if (xerror_occured) {
 169         g_warning("A window manager is already running on screen %d",
 170                   ob_screen);
 171
 172         XDestroyWindow(ob_display, screen_support_win);
 173         return FALSE;
 174     }
 175
 176
 177     ob_debug("Managing screen %d\n", ob_screen);
 178
 179     set_root_cursor();
 180
 181     /* set the OPENBOX_PID hint */
 182     pid = getpid();
 183     PROP_SET32(RootWindow(ob_display, ob_screen),
 184                openbox_pid, cardinal, pid);
 185
 186     /* set supporting window */
 187     PROP_SET32(RootWindow(ob_display, ob_screen),
 188                net_supporting_wm_check, window, screen_support_win);
 189
 190     /* set properties on the supporting window */
 191     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 192     PROP_SET32(screen_support_win, net_supporting_wm_check,
 193                window, screen_support_win);
 194
 195     /* set the _NET_SUPPORTED_ATOMS hint */
 196     num_support = 61;
 197     i = 0;
 198     supported = g_new(guint32, num_support);
 199     supported[i++] = prop_atoms.net_current_desktop;
 200     supported[i++] = prop_atoms.net_number_of_desktops;
 201     supported[i++] = prop_atoms.net_desktop_geometry;
 202     supported[i++] = prop_atoms.net_desktop_viewport;
 203     supported[i++] = prop_atoms.net_active_window;
 204     supported[i++] = prop_atoms.net_workarea;
 205     supported[i++] = prop_atoms.net_client_list;
 206     supported[i++] = prop_atoms.net_client_list_stacking;
 207     supported[i++] = prop_atoms.net_desktop_names;
 208     supported[i++] = prop_atoms.net_close_window;
 209     supported[i++] = prop_atoms.net_desktop_layout;
 210     supported[i++] = prop_atoms.net_showing_desktop;
 211     supported[i++] = prop_atoms.net_wm_name;
 212     supported[i++] = prop_atoms.net_wm_visible_name;
 213     supported[i++] = prop_atoms.net_wm_icon_name;
 214     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 215     supported[i++] = prop_atoms.net_wm_desktop;
 216     supported[i++] = prop_atoms.net_wm_strut;
 217     supported[i++] = prop_atoms.net_wm_window_type;
 218     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 219     supported[i++] = prop_atoms.net_wm_window_type_dock;
 220     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 221     supported[i++] = prop_atoms.net_wm_window_type_menu;
 222     supported[i++] = prop_atoms.net_wm_window_type_utility;
 223     supported[i++] = prop_atoms.net_wm_window_type_splash;
 224     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 225     supported[i++] = prop_atoms.net_wm_window_type_normal;
 226     supported[i++] = prop_atoms.net_wm_allowed_actions;
 227     supported[i++] = prop_atoms.net_wm_action_move;
 228     supported[i++] = prop_atoms.net_wm_action_resize;
 229     supported[i++] = prop_atoms.net_wm_action_minimize;
 230     supported[i++] = prop_atoms.net_wm_action_shade;
 231     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 232     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 233     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 234     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 235     supported[i++] = prop_atoms.net_wm_action_close;
 236     supported[i++] = prop_atoms.net_wm_state;
 237     supported[i++] = prop_atoms.net_wm_state_modal;
 238     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 239     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 240     supported[i++] = prop_atoms.net_wm_state_shaded;
 241     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 242     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 243     supported[i++] = prop_atoms.net_wm_state_hidden;
 244     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 245     supported[i++] = prop_atoms.net_wm_state_above;
 246     supported[i++] = prop_atoms.net_wm_state_below;
 247     supported[i++] = prop_atoms.net_moveresize_window;
 248     supported[i++] = prop_atoms.net_wm_moveresize;
 249     supported[i++] = prop_atoms.net_wm_moveresize_size_topleft;
 250     supported[i++] = prop_atoms.net_wm_moveresize_size_top;
 251     supported[i++] = prop_atoms.net_wm_moveresize_size_topright;
 252     supported[i++] = prop_atoms.net_wm_moveresize_size_right;
 253     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomright;
 254     supported[i++] = prop_atoms.net_wm_moveresize_size_bottom;
 255     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomleft;
 256     supported[i++] = prop_atoms.net_wm_moveresize_size_left;
 257     supported[i++] = prop_atoms.net_wm_moveresize_move;
 258     supported[i++] = prop_atoms.net_wm_moveresize_size_keyboard;
 259     supported[i++] = prop_atoms.net_wm_moveresize_move_keyboard;
 260     g_assert(i == num_support);
 261 /*
 262   supported[] = prop_atoms.net_wm_action_stick;
 263 */
 264
 265     PROP_SETA32(RootWindow(ob_display, ob_screen),
 266                 net_supported, atom, supported, num_support);
 267     g_free(supported);
 268
 269     return TRUE;
 270 }
 271
 272 void screen_startup()
 273 {
 274     GSList *it;
 275     guint i;
 276
 277     /* get the initial size */
 278     screen_resize();
 279
 280     /* set the names */
 281     screen_desktop_names = g_new(char*,
 282                                  g_slist_length(config_desktops_names) + 1);
 283     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 284         screen_desktop_names[i] = it->data; /* dont strdup */
 285     screen_desktop_names[i] = NULL;
 286     PROP_SETSS(RootWindow(ob_display, ob_screen),
 287                net_desktop_names, screen_desktop_names);
 288     g_free(screen_desktop_names); /* dont free the individual strings */
 289     screen_desktop_names = NULL;
 290
 291     screen_num_desktops = 0;
 292     screen_set_num_desktops(config_desktops_num);
 293     if (startup_desktop >= screen_num_desktops)
 294         startup_desktop = 0;
 295     screen_desktop = startup_desktop;
 296     screen_set_desktop(startup_desktop);
 297
 298     /* don't start in showing-desktop mode */
 299     screen_showing_desktop = FALSE;
 300     PROP_SET32(RootWindow(ob_display, ob_screen),
 301                net_showing_desktop, cardinal, screen_showing_desktop);
 302
 303     screen_update_layout();
 304
 305 #ifdef USE_LIBSN
 306     sn_context = sn_monitor_context_new(ob_sn_display, ob_screen,
 307                                         sn_event_func, NULL, NULL);
 308     sn_busy_cnt = 0;
 309 #endif
 310 }
 311
 312 void screen_shutdown()
 313 {
 314     Rect **r;
 315
 316     XSelectInput(ob_display, RootWindow(ob_display, ob_screen), NoEventMask);
 317
 318     /* we're not running here no more! */
 319     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 320     /* not without us */
 321     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 322     /* don't keep this mode */
 323     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 324
 325     XDestroyWindow(ob_display, screen_support_win);
 326
 327     g_strfreev(screen_desktop_names);
 328     for (r = area; *r; ++r)
 329         g_free(*r);
 330     g_free(area);
 331 }
 332
 333 void screen_resize()
 334 {
 335     static int oldw = 0, oldh = 0;
 336     int w, h;
 337     GList *it;
 338     guint32 geometry[2];
 339
 340     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 341     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 342
 343     if (w == oldw && h == oldh) return;
 344
 345     oldw = w; oldh = h;
 346
 347     /* Set the _NET_DESKTOP_GEOMETRY hint */
 348     screen_physical_size.width = geometry[0] = w;
 349     screen_physical_size.height = geometry[1] = h;
 350     PROP_SETA32(RootWindow(ob_display, ob_screen),
 351                 net_desktop_geometry, cardinal, geometry, 2);
 352
 353     if (ob_state() == OB_STATE_STARTING)
 354         return;
 355
 356     dock_configure();
 357     screen_update_areas();
 358
 359     for (it = client_list; it; it = it->next)
 360         client_move_onscreen(it->data, FALSE);
 361 }
 362
 363 void screen_set_num_desktops(guint num)
 364 {
 365     guint i, old;
 366     guint32 *viewport;
 367     GList *it;
 368
 369     g_assert(num > 0);
 370
 371     old = screen_num_desktops;
 372     screen_num_desktops = num;
 373     PROP_SET32(RootWindow(ob_display, ob_screen),
 374                net_number_of_desktops, cardinal, num);
 375
 376     /* set the viewport hint */
 377     viewport = g_new0(guint32, num * 2);
 378     PROP_SETA32(RootWindow(ob_display, ob_screen),
 379                 net_desktop_viewport, cardinal, viewport, num * 2);
 380     g_free(viewport);
 381
 382     /* the number of rows/columns will differ */
 383     screen_update_layout();
 384
 385     /* may be some unnamed desktops that we need to fill in with names */
 386     screen_update_desktop_names();
 387
 388     /* update the focus lists */
 389     /* free our lists for the desktops which have disappeared */
 390     for (i = num; i < old; ++i)
 391         g_list_free(focus_order[i]);
 392     /* realloc the array */
 393     focus_order = g_renew(GList*, focus_order, num);
 394     /* set the new lists to be empty */
 395     for (i = old; i < num; ++i)
 396         focus_order[i] = NULL;
 397
 398     /* move windows on desktops that will no longer exist! */
 399     for (it = client_list; it != NULL; it = it->next) {
 400         ObClient *c = it->data;
 401         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 402             client_set_desktop(c, num - 1, FALSE);
 403     }
 404
 405     /* change our struts/area to match (after moving windows) */
 406     screen_update_areas();
 407
 408     dispatch_ob(Event_Ob_NumDesktops, num, old);
 409
 410     /* change our desktop if we're on one that no longer exists! */
 411     if (screen_desktop >= screen_num_desktops)
 412         screen_set_desktop(num - 1);
 413 }
 414
 415 void screen_set_desktop(guint num)
 416 {
 417     GList *it;
 418     guint old;
 419     XEvent e;
 420
 421     g_assert(num < screen_num_desktops);
 422
 423     old = screen_desktop;
 424     screen_desktop = num;
 425     PROP_SET32(RootWindow(ob_display, ob_screen),
 426                net_current_desktop, cardinal, num);
 427
 428     if (old == num) return;
 429
 430     ob_debug("Moving to desktop %d\n", num+1);
 431
 432     /* show windows before hiding the rest to lessen the enter/leave events */
 433
 434     /* show windows from top to bottom */
 435     for (it = stacking_list; it != NULL; it = it->next) {
 436         if (WINDOW_IS_CLIENT(it->data)) {
 437             ObClient *c = it->data;
 438             if (!c->frame->visible && client_should_show(c))
 439                 frame_show(c->frame);
 440         }
 441     }
 442
 443     /* hide windows from bottom to top */
 444     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 445         if (WINDOW_IS_CLIENT(it->data)) {
 446             ObClient *c = it->data;
 447             if (c->frame->visible && !client_should_show(c))
 448                 frame_hide(c->frame);
 449         }
 450     }
 451
 452     /* focus the last focused window on the desktop, and ignore enter events
 453        from the switch so it doesnt mess with the focus */
 454     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 455 #ifdef DEBUG_FOCUS
 456     ob_debug("switch fallback\n");
 457 #endif
 458     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 459 #ifdef DEBUG_FOCUS
 460     ob_debug("/switch fallback\n");
 461 #endif
 462
 463     dispatch_ob(Event_Ob_Desktop, num, old);
 464 }
 465
 466 void screen_update_layout()
 467 {
 468     ObOrientation orient;
 469     ObCorner corner;
 470     guint rows;
 471     guint cols;
 472     guint32 *data;
 473     guint num;
 474     gboolean valid = FALSE;
 475
 476     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 477                     net_desktop_layout, cardinal, &data, &num)) {
 478         if (num == 3 || num == 4) {
 479
 480             if (data[0] == prop_atoms.net_wm_orientation_vert)
 481                 orient = OB_ORIENTATION_VERT;
 482             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 483                 orient = OB_ORIENTATION_HORZ;
 484             else
 485                 goto screen_update_layout_bail;
 486
 487             if (num < 4)
 488                 corner = OB_CORNER_TOPLEFT;
 489             else {
 490                 if (data[3] == prop_atoms.net_wm_topright)
 491                     corner = OB_CORNER_TOPRIGHT;
 492                 else if (data[3] == prop_atoms.net_wm_bottomright)
 493                     corner = OB_CORNER_BOTTOMRIGHT;
 494                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 495                     corner = OB_CORNER_BOTTOMLEFT;
 496                 else
 497                     goto screen_update_layout_bail;
 498             }
 499
 500             /* fill in a zero rows/columns */
 501             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 502                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 503                 goto screen_update_layout_bail;
 504             } else {
 505                 if (data[1] == 0) {
 506                     data[1] = (screen_num_desktops +
 507                                screen_num_desktops % data[2]) / data[2];
 508                 } else if (data[2] == 0) {
 509                     data[2] = (screen_num_desktops +
 510                                screen_num_desktops % data[1]) / data[1];
 511                 }
 512                 cols = data[1];
 513                 rows = data[2];
 514             }
 515
 516             /* bounds checking */
 517             if (orient == OB_ORIENTATION_HORZ) {
 518                 rows = MIN(rows, screen_num_desktops);
 519                 cols = MIN(cols, ((screen_num_desktops +
 520                                      (screen_num_desktops % rows)) / rows));
 521             } else {
 522                 cols = MIN(cols, screen_num_desktops);
 523                 rows = MIN(rows, ((screen_num_desktops +
 524                                      (screen_num_desktops % cols)) / cols));
 525             }
 526
 527             valid = TRUE;
 528         }
 529     screen_update_layout_bail:
 530         g_free(data);
 531     }
 532
 533     if (!valid) {
 534         /* defaults */
 535         orient = OB_ORIENTATION_HORZ;
 536         corner = OB_CORNER_TOPLEFT;
 537         rows = 1;
 538         cols = screen_num_desktops;
 539     }
 540
 541     screen_desktop_layout.orientation = orient;
 542     screen_desktop_layout.start_corner = corner;
 543     screen_desktop_layout.rows = rows;
 544     screen_desktop_layout.columns = cols;
 545 }
 546
 547 void screen_update_desktop_names()
 548 {
 549     guint i;
 550
 551     /* empty the array */
 552     g_strfreev(screen_desktop_names);
 553     screen_desktop_names = NULL;
 554
 555     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 556                    net_desktop_names, utf8, &screen_desktop_names))
 557         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 558     else
 559         i = 0;
 560     if (i <= screen_num_desktops) {
 561         screen_desktop_names = g_renew(char*, screen_desktop_names,
 562                                        screen_num_desktops + 1);
 563         screen_desktop_names[screen_num_desktops] = NULL;
 564         for (; i < screen_num_desktops; ++i)
 565             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 566     }
 567 }
 568
 569 void screen_show_desktop(gboolean show)
 570 {
 571     GList *it;
 572
 573     if (show == screen_showing_desktop) return; /* no change */
 574
 575     screen_showing_desktop = show;
 576
 577     if (show) {
 578         /* bottom to top */
 579         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 580             if (WINDOW_IS_CLIENT(it->data)) {
 581                 ObClient *client = it->data;
 582                 if (client->frame->visible && !client_should_show(client))
 583                     frame_hide(client->frame);
 584             }
 585         }
 586     } else {
 587         /* top to bottom */
 588         for (it = stacking_list; it != NULL; it = it->next) {
 589             if (WINDOW_IS_CLIENT(it->data)) {
 590                 ObClient *client = it->data;
 591                 if (!client->frame->visible && client_should_show(client))
 592                     frame_show(client->frame);
 593             }
 594         }
 595     }
 596
 597     if (show) {
 598         /* focus desktop */
 599         for (it = focus_order[screen_desktop]; it; it = it->next)
 600             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 601                 client_focus(it->data))
 602                 break;
 603     } else {
 604         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 605     }
 606
 607     show = !!show; /* make it boolean */
 608     PROP_SET32(RootWindow(ob_display, ob_screen),
 609                net_showing_desktop, cardinal, show);
 610
 611     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
 612 }
 613
 614 void screen_install_colormap(ObClient *client, gboolean install)
 615 {
 616     XWindowAttributes wa;
 617
 618     if (client == NULL) {
 619         if (install)
 620             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 621         else
 622             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 623     } else {
 624         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 625             wa.colormap != None) {
 626             xerror_set_ignore(TRUE);
 627             if (install)
 628                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 629             else
 630                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 631             xerror_set_ignore(FALSE);
 632         }
 633     }
 634 }
 635
 636 void screen_update_areas()
 637 {
 638     guint i, x;
 639     guint32 *dims;
 640     GList *it;
 641
 642     g_free(monitor_area);
 643     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 644
 645     if (area) {
 646         for (i = 0; area[i]; ++i)
 647             g_free(area[i]);
 648         g_free(area);
 649     }
 650
 651     area = g_new(Rect*, screen_num_desktops + 2);
 652     for (i = 0; i < screen_num_desktops + 1; ++i)
 653         area[i] = g_new(Rect, screen_num_monitors + 1);
 654     area[i] = NULL;
 655
 656     dims = g_new(guint32, 4 * screen_num_desktops);
 657
 658     for (i = 0; i < screen_num_desktops + 1; ++i) {
 659         Strut s;
 660         int l, r, t, b;
 661
 662         /* calc the xinerama areas */
 663         for (x = 0; x < screen_num_monitors; ++x) {
 664             area[i][x] = monitor_area[x];
 665             if (x == 0) {
 666                 l = monitor_area[x].x;
 667                 t = monitor_area[x].y;
 668                 r = monitor_area[x].x + monitor_area[x].width - 1;
 669                 b = monitor_area[x].y + monitor_area[x].height - 1;
 670             } else {
 671                 l = MIN(l, monitor_area[x].x);
 672                 t = MIN(t, monitor_area[x].y);
 673                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 674                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 675             }
 676         }
 677         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 678
 679         /* apply struts */
 680         STRUT_SET(s, 0, 0, 0, 0);
 681         for (it = client_list; it; it = it->next)
 682             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 683         STRUT_ADD(s, dock_strut);
 684
 685         if (s.left) {
 686             int o;
 687
 688             /* find the left-most xin heads, i do this in 2 loops :| */
 689             o = area[i][0].x;
 690             for (x = 1; x < screen_num_monitors; ++x)
 691                 o = MIN(o, area[i][x].x);
 692
 693             for (x = 0; x < screen_num_monitors; ++x) {
 694                 int edge = o + s.left - area[i][x].x;
 695                 if (edge > 0) {
 696                     area[i][x].x += edge;
 697                     area[i][x].width -= edge;
 698                 }
 699             }
 700
 701             area[i][screen_num_monitors].x += s.left;
 702             area[i][screen_num_monitors].width -= s.left;
 703         }
 704         if (s.top) {
 705             int o;
 706
 707             /* find the left-most xin heads, i do this in 2 loops :| */
 708             o = area[i][0].y;
 709             for (x = 1; x < screen_num_monitors; ++x)
 710                 o = MIN(o, area[i][x].y);
 711
 712             for (x = 0; x < screen_num_monitors; ++x) {
 713                 int edge = o + s.top - area[i][x].y;
 714                 if (edge > 0) {
 715                     area[i][x].y += edge;
 716                     area[i][x].height -= edge;
 717                 }
 718             }
 719
 720             area[i][screen_num_monitors].y += s.top;
 721             area[i][screen_num_monitors].height -= s.top;
 722         }
 723         if (s.right) {
 724             int o;
 725
 726             /* find the bottom-most xin heads, i do this in 2 loops :| */
 727             o = area[i][0].x + area[i][0].width - 1;
 728             for (x = 1; x < screen_num_monitors; ++x)
 729                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 730
 731             for (x = 0; x < screen_num_monitors; ++x) {
 732                 int edge = (area[i][x].x + area[i][x].width - 1) -
 733                     (o - s.right);
 734                 if (edge > 0)
 735                     area[i][x].width -= edge;
 736             }
 737
 738             area[i][screen_num_monitors].width -= s.right;
 739         }
 740         if (s.bottom) {
 741             int o;
 742
 743             /* find the bottom-most xin heads, i do this in 2 loops :| */
 744             o = area[i][0].y + area[i][0].height - 1;
 745             for (x = 1; x < screen_num_monitors; ++x)
 746                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 747
 748             for (x = 0; x < screen_num_monitors; ++x) {
 749                 int edge = (area[i][x].y + area[i][x].height - 1) -
 750                     (o - s.bottom);
 751                 if (edge > 0)
 752                     area[i][x].height -= edge;
 753             }
 754
 755             area[i][screen_num_monitors].height -= s.bottom;
 756         }
 757
 758         /* XXX when dealing with partial struts, if its in a single
 759            xinerama area, then only subtract it from that area's space
 760         for (x = 0; x < screen_num_monitors; ++x) {
 761             GList *it;
 762
 763
 764                do something smart with it for the 'all xinerama areas' one...
 765
 766             for (it = client_list; it; it = it->next) {
 767
 768                 XXX if gunna test this shit, then gotta worry about when
 769                 the client moves between xinerama heads..
 770
 771                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
 772                                        area[i][x])) {
 773
 774                 }
 775             }
 776         }
 777         */
 778
 779         /* XXX optimize when this is run? */
 780
 781         /* the area has changed, adjust all the maximized
 782            windows */
 783         for (it = client_list; it; it = it->next) {
 784             ObClient *c = it->data;
 785             if (i < screen_num_desktops) {
 786                 if (c->desktop == i)
 787                     client_reconfigure(c);
 788             } else if (c->desktop == DESKTOP_ALL)
 789                 client_reconfigure(c);
 790         }
 791         if (i < screen_num_desktops) {
 792             /* don't set these for the 'all desktops' area */
 793             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
 794             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
 795             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
 796             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
 797         }
 798     }
 799     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
 800                 dims, 4 * screen_num_desktops);
 801
 802     g_free(dims);
 803 }
 804
 805 Rect *screen_area(guint desktop)
 806 {
 807     return screen_area_monitor(desktop, screen_num_monitors);
 808 }
 809
 810 Rect *screen_area_monitor(guint desktop, guint head)
 811 {
 812     if (head > screen_num_monitors)
 813         return NULL;
 814     if (desktop >= screen_num_desktops) {
 815         if (desktop == DESKTOP_ALL)
 816             return &area[screen_num_desktops][head];
 817         return NULL;
 818     }
 819     return &area[desktop][head];
 820 }
 821
 822 Rect *screen_physical_area()
 823 {
 824     return screen_physical_area_monitor(screen_num_monitors);
 825 }
 826
 827 Rect *screen_physical_area_monitor(guint head)
 828 {
 829     if (head > screen_num_monitors)
 830         return NULL;
 831     return &monitor_area[head];
 832 }
 833
 834 static void set_root_cursor()
 835 {
 836 #ifdef USE_LIBSN
 837         if (sn_busy_cnt)
 838             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
 839                           ob_cursor(OB_CURSOR_BUSY));
 840         else
 841 #endif
 842             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
 843                           ob_cursor(OB_CURSOR_POINTER));
 844 }
 845
 846 #ifdef USE_LIBSN
 847 static void sn_timeout(void *data)
 848 {
 849     timer_stop(sn_timer);
 850     sn_timer = NULL;
 851     sn_busy_cnt = 0;
 852
 853     set_root_cursor();
 854 }
 855
 856 static void sn_event_func(SnMonitorEvent *ev, void *data)
 857 {
 858     SnStartupSequence *seq;
 859     const char *seq_id, *bin_name;
 860     int cnt = sn_busy_cnt;
 861
 862     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
 863         return;
 864
 865     seq_id = sn_startup_sequence_get_id(seq);
 866     bin_name = sn_startup_sequence_get_binary_name(seq);
 867
 868     if (!(seq_id && bin_name))
 869         return;
 870
 871     switch (sn_monitor_event_get_type(ev)) {
 872     case SN_MONITOR_EVENT_INITIATED:
 873         ++sn_busy_cnt;
 874         if (sn_timer)
 875             timer_stop(sn_timer);
 876         /* 30 second timeout for apps to start */
 877         sn_timer = timer_start(30 * 1000000, sn_timeout, NULL);
 878         break;
 879     case SN_MONITOR_EVENT_CHANGED:
 880         break;
 881     case SN_MONITOR_EVENT_COMPLETED:
 882         if (sn_busy_cnt) --sn_busy_cnt;
 883         if (sn_timer) {
 884             timer_stop(sn_timer);
 885             sn_timer = NULL;
 886         }
 887         break;
 888     case SN_MONITOR_EVENT_CANCELED:
 889         if (sn_busy_cnt) --sn_busy_cnt;
 890         if (sn_timer) {
 891             timer_stop(sn_timer);
 892             sn_timer = NULL;
 893         }
 894     };
 895
 896     if (sn_busy_cnt != cnt)
 897         set_root_cursor();
 898 }
 899 #endif
 900
 901 gboolean screen_pointer_pos(int *x, int *y)
 902 {
 903     Window w;
 904     int i;
 905     guint u;
 906
 907     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
 908                            &w, &w, x, y, &i, &i, &u);
 909 }