openbox/screen.c

   1 #include "debug.h"
   2 #include "openbox.h"
   3 #include "mainloop.h"
   4 #include "dock.h"
   5 #include "xerror.h"
   6 #include "prop.h"
   7 #include "startup.h"
   8 #include "grab.h"
   9 #include "config.h"
  10 #include "screen.h"
  11 #include "client.h"
  12 #include "frame.h"
  13 #include "focus.h"
  14 #include "popup.h"
  15 #include "extensions.h"
  16 #include "render/render.h"
  17
  18 #ifdef USE_LIBSN
  19 #  define SN_API_NOT_YET_FROZEN
  20 #  include <libsn/sn.h>
  21 #endif
  22
  23 #include <X11/Xlib.h>
  24 #ifdef HAVE_UNISTD_H
  25 #  include <sys/types.h>
  26 #  include <unistd.h>
  27 #endif
  28 #include <assert.h>
  29
  30 /*! The event mask to grab on the root window */
  31 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  32                         EnterWindowMask | LeaveWindowMask | \
  33                         SubstructureNotifyMask | SubstructureRedirectMask | \
  34                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  35
  36 guint    screen_num_desktops;
  37 guint    screen_num_monitors;
  38 guint    screen_desktop;
  39 Size     screen_physical_size;
  40 gboolean screen_showing_desktop;
  41 DesktopLayout screen_desktop_layout;
  42 char   **screen_desktop_names;
  43 Window   screen_support_win;
  44
  45 static Rect  **area; /* array of desktop holding array of xinerama areas */
  46 static Rect  *monitor_area;
  47
  48 static Popup *desktop_cycle_popup;
  49
  50 #ifdef USE_LIBSN
  51 static SnMonitorContext *sn_context;
  52 static int sn_busy_cnt;
  53
  54 static void sn_event_func(SnMonitorEvent *event, void *data);
  55 #endif
  56
  57 static void set_root_cursor();
  58
  59 static gboolean replace_wm()
  60 {
  61     char *wm_sn;
  62     Atom wm_sn_atom;
  63     Window current_wm_sn_owner;
  64     Time timestamp;
  65
  66     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  67     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  68     g_free(wm_sn);
  69
  70     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  71     if (current_wm_sn_owner) {
  72         if (!ob_replace_wm) {
  73             g_warning("A window manager is already running on screen %d",
  74                       ob_screen);
  75             return FALSE;
  76         }
  77         xerror_set_ignore(TRUE);
  78         xerror_occured = FALSE;
  79
  80         /* We want to find out when the current selection owner dies */
  81         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  82         XSync(ob_display, FALSE);
  83
  84         xerror_set_ignore(FALSE);
  85         if (xerror_occured)
  86             current_wm_sn_owner = None;
  87     }
  88
  89     {
  90         /* Generate a timestamp */
  91         XEvent event;
  92
  93         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
  94
  95         XChangeProperty(ob_display, screen_support_win,
  96                         prop_atoms.wm_class, prop_atoms.string,
  97                         8, PropModeAppend, NULL, 0);
  98         XWindowEvent(ob_display, screen_support_win,
  99                      PropertyChangeMask, &event);
 100
 101         XSelectInput(ob_display, screen_support_win, NoEventMask);
 102
 103         timestamp = event.xproperty.time;
 104     }
 105
 106     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 107                        timestamp);
 108
 109     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 110         g_warning("Could not acquire window manager selection on screen %d",
 111                   ob_screen);
 112         return FALSE;
 113     }
 114
 115     /* Wait for old window manager to go away */
 116     if (current_wm_sn_owner) {
 117       XEvent event;
 118       gulong wait = 0;
 119       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 120
 121       while (wait < timeout) {
 122           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 123                                 StructureNotifyMask, &event) &&
 124               event.type == DestroyNotify)
 125               break;
 126           g_usleep(G_USEC_PER_SEC / 10);
 127           wait += G_USEC_PER_SEC / 10;
 128       }
 129
 130       if (wait >= timeout) {
 131           g_warning("Timeout expired while waiting for the current WM to die "
 132                     "on screen %d", ob_screen);
 133           return FALSE;
 134       }
 135     }
 136
 137     /* Send client message indicating that we are now the WM */
 138     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 139                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 140
 141
 142     return TRUE;
 143 }
 144
 145 gboolean screen_annex()
 146 {
 147     XSetWindowAttributes attrib;
 148     pid_t pid;
 149     gint i, num_support;
 150     guint32 *supported;
 151
 152     /* create the netwm support window */
 153     attrib.override_redirect = TRUE;
 154     screen_support_win = XCreateWindow(ob_display,
 155                                        RootWindow(ob_display, ob_screen),
 156                                        -100, -100, 1, 1, 0,
 157                                        CopyFromParent, InputOutput,
 158                                        CopyFromParent,
 159                                        CWOverrideRedirect, &attrib);
 160     XMapRaised(ob_display, screen_support_win);
 161
 162     if (!replace_wm()) {
 163         XDestroyWindow(ob_display, screen_support_win);
 164         return FALSE;
 165     }
 166
 167     xerror_set_ignore(TRUE);
 168     xerror_occured = FALSE;
 169     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 170                  ROOT_EVENTMASK);
 171     xerror_set_ignore(FALSE);
 172     if (xerror_occured) {
 173         g_warning("A window manager is already running on screen %d",
 174                   ob_screen);
 175
 176         XDestroyWindow(ob_display, screen_support_win);
 177         return FALSE;
 178     }
 179
 180
 181     set_root_cursor();
 182
 183     /* set the OPENBOX_PID hint */
 184     pid = getpid();
 185     PROP_SET32(RootWindow(ob_display, ob_screen),
 186                openbox_pid, cardinal, pid);
 187
 188     /* set supporting window */
 189     PROP_SET32(RootWindow(ob_display, ob_screen),
 190                net_supporting_wm_check, window, screen_support_win);
 191
 192     /* set properties on the supporting window */
 193     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 194     PROP_SET32(screen_support_win, net_supporting_wm_check,
 195                window, screen_support_win);
 196
 197     /* set the _NET_SUPPORTED_ATOMS hint */
 198     num_support = 50;
 199     i = 0;
 200     supported = g_new(guint32, num_support);
 201     supported[i++] = prop_atoms.net_current_desktop;
 202     supported[i++] = prop_atoms.net_number_of_desktops;
 203     supported[i++] = prop_atoms.net_desktop_geometry;
 204     supported[i++] = prop_atoms.net_desktop_viewport;
 205     supported[i++] = prop_atoms.net_active_window;
 206     supported[i++] = prop_atoms.net_workarea;
 207     supported[i++] = prop_atoms.net_client_list;
 208     supported[i++] = prop_atoms.net_client_list_stacking;
 209     supported[i++] = prop_atoms.net_desktop_names;
 210     supported[i++] = prop_atoms.net_close_window;
 211     supported[i++] = prop_atoms.net_desktop_layout;
 212     supported[i++] = prop_atoms.net_showing_desktop;
 213     supported[i++] = prop_atoms.net_wm_name;
 214     supported[i++] = prop_atoms.net_wm_visible_name;
 215     supported[i++] = prop_atoms.net_wm_icon_name;
 216     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 217     supported[i++] = prop_atoms.net_wm_desktop;
 218     supported[i++] = prop_atoms.net_wm_strut;
 219     supported[i++] = prop_atoms.net_wm_window_type;
 220     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 221     supported[i++] = prop_atoms.net_wm_window_type_dock;
 222     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 223     supported[i++] = prop_atoms.net_wm_window_type_menu;
 224     supported[i++] = prop_atoms.net_wm_window_type_utility;
 225     supported[i++] = prop_atoms.net_wm_window_type_splash;
 226     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 227     supported[i++] = prop_atoms.net_wm_window_type_normal;
 228     supported[i++] = prop_atoms.net_wm_allowed_actions;
 229     supported[i++] = prop_atoms.net_wm_action_move;
 230     supported[i++] = prop_atoms.net_wm_action_resize;
 231     supported[i++] = prop_atoms.net_wm_action_minimize;
 232     supported[i++] = prop_atoms.net_wm_action_shade;
 233     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 234     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 235     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 236     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 237     supported[i++] = prop_atoms.net_wm_action_close;
 238     supported[i++] = prop_atoms.net_wm_state;
 239     supported[i++] = prop_atoms.net_wm_state_modal;
 240     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 241     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 242     supported[i++] = prop_atoms.net_wm_state_shaded;
 243     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 244     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 245     supported[i++] = prop_atoms.net_wm_state_hidden;
 246     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 247     supported[i++] = prop_atoms.net_wm_state_above;
 248     supported[i++] = prop_atoms.net_wm_state_below;
 249     supported[i++] = prop_atoms.net_moveresize_window;
 250     supported[i++] = prop_atoms.net_wm_moveresize;
 251     g_assert(i == num_support);
 252 /*
 253   supported[] = prop_atoms.net_wm_action_stick;
 254 */
 255
 256     PROP_SETA32(RootWindow(ob_display, ob_screen),
 257                 net_supported, atom, supported, num_support);
 258     g_free(supported);
 259
 260     return TRUE;
 261 }
 262
 263 void screen_startup()
 264 {
 265     GSList *it;
 266     guint i;
 267
 268     desktop_cycle_popup = popup_new(FALSE);
 269
 270     /* get the initial size */
 271     screen_resize();
 272
 273     /* set the names */
 274     screen_desktop_names = g_new(char*,
 275                                  g_slist_length(config_desktops_names) + 1);
 276     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 277         screen_desktop_names[i] = it->data; /* dont strdup */
 278     screen_desktop_names[i] = NULL;
 279     PROP_SETSS(RootWindow(ob_display, ob_screen),
 280                net_desktop_names, screen_desktop_names);
 281     g_free(screen_desktop_names); /* dont free the individual strings */
 282     screen_desktop_names = NULL;
 283
 284     screen_num_desktops = 0;
 285     screen_set_num_desktops(config_desktops_num);
 286     if (startup_desktop >= screen_num_desktops)
 287         startup_desktop = 0;
 288     screen_desktop = startup_desktop;
 289     screen_set_desktop(startup_desktop);
 290
 291     /* don't start in showing-desktop mode */
 292     screen_showing_desktop = FALSE;
 293     PROP_SET32(RootWindow(ob_display, ob_screen),
 294                net_showing_desktop, cardinal, screen_showing_desktop);
 295
 296     screen_update_layout();
 297
 298 #ifdef USE_LIBSN
 299     sn_context = sn_monitor_context_new(ob_sn_display, ob_screen,
 300                                         sn_event_func, NULL, NULL);
 301     sn_busy_cnt = 0;
 302 #endif
 303 }
 304
 305 void screen_shutdown()
 306 {
 307     Rect **r;
 308
 309     popup_free(desktop_cycle_popup);
 310
 311     XSelectInput(ob_display, RootWindow(ob_display, ob_screen), NoEventMask);
 312
 313     /* we're not running here no more! */
 314     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 315     /* not without us */
 316     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 317     /* don't keep this mode */
 318     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 319
 320     XDestroyWindow(ob_display, screen_support_win);
 321
 322     g_strfreev(screen_desktop_names);
 323     for (r = area; *r; ++r)
 324         g_free(*r);
 325     g_free(area);
 326 }
 327
 328 void screen_resize()
 329 {
 330     static int oldw = 0, oldh = 0;
 331     int w, h;
 332     GList *it;
 333     guint32 geometry[2];
 334
 335     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 336     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 337
 338     if (w == oldw && h == oldh) return;
 339
 340     oldw = w; oldh = h;
 341
 342     /* Set the _NET_DESKTOP_GEOMETRY hint */
 343     screen_physical_size.width = geometry[0] = w;
 344     screen_physical_size.height = geometry[1] = h;
 345     PROP_SETA32(RootWindow(ob_display, ob_screen),
 346                 net_desktop_geometry, cardinal, geometry, 2);
 347
 348     if (ob_state() == OB_STATE_STARTING)
 349         return;
 350
 351     screen_update_areas();
 352     dock_configure();
 353
 354     for (it = client_list; it; it = it->next)
 355         client_move_onscreen(it->data, FALSE);
 356 }
 357
 358 void screen_set_num_desktops(guint num)
 359 {
 360     guint i, old;
 361     guint32 *viewport;
 362     GList *it;
 363
 364     g_assert(num > 0);
 365
 366     old = screen_num_desktops;
 367     screen_num_desktops = num;
 368     PROP_SET32(RootWindow(ob_display, ob_screen),
 369                net_number_of_desktops, cardinal, num);
 370
 371     /* set the viewport hint */
 372     viewport = g_new0(guint32, num * 2);
 373     PROP_SETA32(RootWindow(ob_display, ob_screen),
 374                 net_desktop_viewport, cardinal, viewport, num * 2);
 375     g_free(viewport);
 376
 377     /* the number of rows/columns will differ */
 378     screen_update_layout();
 379
 380     /* may be some unnamed desktops that we need to fill in with names */
 381     screen_update_desktop_names();
 382
 383     /* update the focus lists */
 384     /* free our lists for the desktops which have disappeared */
 385     for (i = num; i < old; ++i)
 386         g_list_free(focus_order[i]);
 387     /* realloc the array */
 388     focus_order = g_renew(GList*, focus_order, num);
 389     /* set the new lists to be empty */
 390     for (i = old; i < num; ++i)
 391         focus_order[i] = NULL;
 392
 393     /* move windows on desktops that will no longer exist! */
 394     for (it = client_list; it != NULL; it = it->next) {
 395         ObClient *c = it->data;
 396         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 397             client_set_desktop(c, num - 1, FALSE);
 398     }
 399
 400     /* change our struts/area to match (after moving windows) */
 401     screen_update_areas();
 402
 403     /* change our desktop if we're on one that no longer exists! */
 404     if (screen_desktop >= screen_num_desktops)
 405         screen_set_desktop(num - 1);
 406 }
 407
 408 void screen_set_desktop(guint num)
 409 {
 410     GList *it;
 411     guint old;
 412     XEvent e;
 413
 414     g_assert(num < screen_num_desktops);
 415
 416     old = screen_desktop;
 417     screen_desktop = num;
 418     PROP_SET32(RootWindow(ob_display, ob_screen),
 419                net_current_desktop, cardinal, num);
 420
 421     if (old == num) return;
 422
 423     ob_debug("Moving to desktop %d\n", num+1);
 424
 425     /* show windows before hiding the rest to lessen the enter/leave events */
 426
 427     /* show windows from top to bottom */
 428     for (it = stacking_list; it != NULL; it = it->next) {
 429         if (WINDOW_IS_CLIENT(it->data)) {
 430             ObClient *c = it->data;
 431             if (!c->frame->visible && client_should_show(c))
 432                 frame_show(c->frame);
 433         }
 434     }
 435
 436     /* hide windows from bottom to top */
 437     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 438         if (WINDOW_IS_CLIENT(it->data)) {
 439             ObClient *c = it->data;
 440             if (c->frame->visible && !client_should_show(c))
 441                 frame_hide(c->frame);
 442         }
 443     }
 444
 445     /* focus the last focused window on the desktop, and ignore enter events
 446        from the switch so it doesnt mess with the focus */
 447     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 448 #ifdef DEBUG_FOCUS
 449     ob_debug("switch fallback\n");
 450 #endif
 451     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 452 #ifdef DEBUG_FOCUS
 453     ob_debug("/switch fallback\n");
 454 #endif
 455 }
 456
 457 static void get_row_col(guint d, guint *r, guint *c)
 458 {
 459     switch (screen_desktop_layout.orientation) {
 460     case OB_ORIENTATION_HORZ:
 461         switch (screen_desktop_layout.start_corner) {
 462         case OB_CORNER_TOPLEFT:
 463             *r = d / screen_desktop_layout.columns;
 464             *c = d % screen_desktop_layout.columns;
 465             break;
 466         case OB_CORNER_BOTTOMLEFT:
 467             *r = screen_desktop_layout.rows - 1 -
 468                 d / screen_desktop_layout.columns;
 469             *c = d % screen_desktop_layout.columns;
 470             break;
 471         case OB_CORNER_TOPRIGHT:
 472             *r = d / screen_desktop_layout.columns;
 473             *c = screen_desktop_layout.columns - 1 -
 474                 d % screen_desktop_layout.columns;
 475             break;
 476         case OB_CORNER_BOTTOMRIGHT:
 477             *r = screen_desktop_layout.rows - 1 -
 478                 d / screen_desktop_layout.columns;
 479             *c = screen_desktop_layout.columns - 1 -
 480                 d % screen_desktop_layout.columns;
 481             break;
 482         }
 483         break;
 484     case OB_ORIENTATION_VERT:
 485         switch (screen_desktop_layout.start_corner) {
 486         case OB_CORNER_TOPLEFT:
 487             *r = d % screen_desktop_layout.rows;
 488             *c = d / screen_desktop_layout.rows;
 489             break;
 490         case OB_CORNER_BOTTOMLEFT:
 491             *r = screen_desktop_layout.rows - 1 -
 492                 d % screen_desktop_layout.rows;
 493             *c = d / screen_desktop_layout.rows;
 494             break;
 495         case OB_CORNER_TOPRIGHT:
 496             *r = d % screen_desktop_layout.rows;
 497             *c = screen_desktop_layout.columns - 1 -
 498                 d / screen_desktop_layout.rows;
 499             break;
 500         case OB_CORNER_BOTTOMRIGHT:
 501             *r = screen_desktop_layout.rows - 1 -
 502                 d % screen_desktop_layout.rows;
 503             *c = screen_desktop_layout.columns - 1 -
 504                 d / screen_desktop_layout.rows;
 505             break;
 506         }
 507         break;
 508     }
 509 }
 510
 511 static guint translate_row_col(guint r, guint c)
 512 {
 513     switch (screen_desktop_layout.orientation) {
 514     case OB_ORIENTATION_HORZ:
 515         switch (screen_desktop_layout.start_corner) {
 516         case OB_CORNER_TOPLEFT:
 517             return r % screen_desktop_layout.rows *
 518                 screen_desktop_layout.columns +
 519                 c % screen_desktop_layout.columns;
 520         case OB_CORNER_BOTTOMLEFT:
 521             return (screen_desktop_layout.rows - 1 -
 522                     r % screen_desktop_layout.rows) *
 523                 screen_desktop_layout.columns +
 524                 c % screen_desktop_layout.columns;
 525         case OB_CORNER_TOPRIGHT:
 526             return r % screen_desktop_layout.rows *
 527                 screen_desktop_layout.columns +
 528                 (screen_desktop_layout.columns - 1 -
 529                  c % screen_desktop_layout.columns);
 530         case OB_CORNER_BOTTOMRIGHT:
 531             return (screen_desktop_layout.rows - 1 -
 532                     r % screen_desktop_layout.rows) *
 533                 screen_desktop_layout.columns +
 534                 (screen_desktop_layout.columns - 1 -
 535                  c % screen_desktop_layout.columns);
 536         }
 537     case OB_ORIENTATION_VERT:
 538         switch (screen_desktop_layout.start_corner) {
 539         case OB_CORNER_TOPLEFT:
 540             return c % screen_desktop_layout.columns *
 541                 screen_desktop_layout.rows +
 542                 r % screen_desktop_layout.rows;
 543         case OB_CORNER_BOTTOMLEFT:
 544             return c % screen_desktop_layout.columns *
 545                 screen_desktop_layout.rows +
 546                 (screen_desktop_layout.rows - 1 -
 547                  r % screen_desktop_layout.rows);
 548         case OB_CORNER_TOPRIGHT:
 549             return (screen_desktop_layout.columns - 1 -
 550                     c % screen_desktop_layout.columns) *
 551                 screen_desktop_layout.rows +
 552                 r % screen_desktop_layout.rows;
 553         case OB_CORNER_BOTTOMRIGHT:
 554             return (screen_desktop_layout.columns - 1 -
 555                     c % screen_desktop_layout.columns) *
 556                 screen_desktop_layout.rows +
 557                 (screen_desktop_layout.rows - 1 -
 558                  r % screen_desktop_layout.rows);
 559         }
 560     }
 561     g_assert_not_reached();
 562     return 0;
 563 }
 564
 565 static void popup_cycle(guint d, gboolean show)
 566 {
 567     Rect *a;
 568
 569     if (!show) {
 570         popup_hide(desktop_cycle_popup);
 571     } else {
 572         a = screen_physical_area_monitor(0);
 573         popup_position(desktop_cycle_popup, CenterGravity,
 574                        a->x + a->width / 2, a->y + a->height / 2);
 575         /* XXX the size and the font extents need to be related on some level
 576          */
 577         popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 578
 579         popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 580
 581         popup_show(desktop_cycle_popup,
 582                    screen_desktop_names[d], NULL);
 583     }
 584 }
 585
 586 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 587                            gboolean dialog, gboolean done, gboolean cancel)
 588 {
 589     static gboolean first = TRUE;
 590     static gboolean lin;
 591     static guint origd, d;
 592     guint r, c;
 593
 594     if (cancel) {
 595         d = origd;
 596         goto done_cycle;
 597     } else if (done && dialog) {
 598         goto done_cycle;
 599     }
 600     if (first) {
 601         first = FALSE;
 602         lin = linear;
 603         d = origd = screen_desktop;
 604     }
 605
 606     get_row_col(d, &r, &c);
 607
 608     if (lin) {
 609         switch (dir) {
 610         case OB_DIRECTION_EAST:
 611             if (d < screen_num_desktops - 1)
 612                 ++d;
 613             else if (wrap)
 614                 d = 0;
 615             break;
 616         case OB_DIRECTION_WEST:
 617             if (d > 0)
 618                 --d;
 619             else if (wrap)
 620                 d = screen_num_desktops - 1;
 621             break;
 622         default:
 623             assert(0);
 624             return screen_desktop;
 625         }
 626     } else {
 627         switch (dir) {
 628         case OB_DIRECTION_EAST:
 629             ++c;
 630             if (c >= screen_desktop_layout.columns) {
 631                 if (!wrap) return d = screen_desktop;
 632                 c = 0;
 633             }
 634             d = translate_row_col(r, c);
 635             if (d >= screen_num_desktops) {
 636                 if (!wrap) return d = screen_desktop;
 637                 ++c;
 638             }
 639             break;
 640         case OB_DIRECTION_WEST:
 641             --c;
 642             if (c >= screen_desktop_layout.columns) {
 643                 if (!wrap) return d = screen_desktop;
 644                 c = screen_desktop_layout.columns - 1;
 645             }
 646             d = translate_row_col(r, c);
 647             if (d >= screen_num_desktops) {
 648                 if (!wrap) return d = screen_desktop;
 649                 --c;
 650             }
 651             break;
 652         case OB_DIRECTION_SOUTH:
 653             ++r;
 654             if (r >= screen_desktop_layout.rows) {
 655                 if (!wrap) return d = screen_desktop;
 656                 r = 0;
 657             }
 658             d = translate_row_col(r, c);
 659             if (d >= screen_num_desktops) {
 660                 if (!wrap) return d = screen_desktop;
 661                 ++r;
 662             }
 663             break;
 664         case OB_DIRECTION_NORTH:
 665             --r;
 666             if (r >= screen_desktop_layout.rows) {
 667                 if (!wrap) return d = screen_desktop;
 668                 r = screen_desktop_layout.rows - 1;
 669             }
 670             d = translate_row_col(r, c);
 671             if (d >= screen_num_desktops) {
 672                 if (!wrap) return d = screen_desktop;
 673                 --r;
 674             }
 675             break;
 676         default:
 677             assert(0);
 678             return d = screen_desktop;
 679         }
 680
 681         d = translate_row_col(r, c);
 682     }
 683
 684     if (dialog) {
 685         popup_cycle(d, TRUE);
 686         return d;
 687     }
 688
 689 done_cycle:
 690     first = TRUE;
 691
 692     popup_cycle(0, FALSE);
 693
 694     return d;
 695 }
 696
 697 void screen_update_layout()
 698 {
 699     ObOrientation orient;
 700     ObCorner corner;
 701     guint rows;
 702     guint cols;
 703     guint32 *data;
 704     guint num;
 705     gboolean valid = FALSE;
 706
 707     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 708                     net_desktop_layout, cardinal, &data, &num)) {
 709         if (num == 3 || num == 4) {
 710
 711             if (data[0] == prop_atoms.net_wm_orientation_vert)
 712                 orient = OB_ORIENTATION_VERT;
 713             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 714                 orient = OB_ORIENTATION_HORZ;
 715             else
 716                 goto screen_update_layout_bail;
 717
 718             if (num < 4)
 719                 corner = OB_CORNER_TOPLEFT;
 720             else {
 721                 if (data[3] == prop_atoms.net_wm_topleft)
 722                     corner = OB_CORNER_TOPLEFT;
 723                 else if (data[3] == prop_atoms.net_wm_topright)
 724                     corner = OB_CORNER_TOPRIGHT;
 725                 else if (data[3] == prop_atoms.net_wm_bottomright)
 726                     corner = OB_CORNER_BOTTOMRIGHT;
 727                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 728                     corner = OB_CORNER_BOTTOMLEFT;
 729                 else
 730                     goto screen_update_layout_bail;
 731             }
 732
 733             /* fill in a zero rows/columns */
 734             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 735                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 736                 goto screen_update_layout_bail;
 737             } else {
 738                 if (data[1] == 0) {
 739                     data[1] = (screen_num_desktops +
 740                                screen_num_desktops % data[2]) / data[2];
 741                 } else if (data[2] == 0) {
 742                     data[2] = (screen_num_desktops +
 743                                screen_num_desktops % data[1]) / data[1];
 744                 }
 745                 cols = data[1];
 746                 rows = data[2];
 747             }
 748
 749             /* bounds checking */
 750             if (orient == OB_ORIENTATION_HORZ) {
 751                 rows = MIN(rows, screen_num_desktops);
 752                 cols = MIN(cols, ((screen_num_desktops +
 753                                      (screen_num_desktops % rows)) / rows));
 754             } else {
 755                 cols = MIN(cols, screen_num_desktops);
 756                 rows = MIN(rows, ((screen_num_desktops +
 757                                      (screen_num_desktops % cols)) / cols));
 758             }
 759
 760             valid = TRUE;
 761         }
 762     screen_update_layout_bail:
 763         g_free(data);
 764     }
 765
 766     if (!valid) {
 767         /* defaults */
 768         orient = OB_ORIENTATION_HORZ;
 769         corner = OB_CORNER_TOPLEFT;
 770         rows = 1;
 771         cols = screen_num_desktops;
 772     }
 773
 774     screen_desktop_layout.orientation = orient;
 775     screen_desktop_layout.start_corner = corner;
 776     screen_desktop_layout.rows = rows;
 777     screen_desktop_layout.columns = cols;
 778 }
 779
 780 void screen_update_desktop_names()
 781 {
 782     guint i;
 783
 784     /* empty the array */
 785     g_strfreev(screen_desktop_names);
 786     screen_desktop_names = NULL;
 787
 788     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 789                    net_desktop_names, utf8, &screen_desktop_names))
 790         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 791     else
 792         i = 0;
 793     if (i <= screen_num_desktops) {
 794         screen_desktop_names = g_renew(char*, screen_desktop_names,
 795                                        screen_num_desktops + 1);
 796         screen_desktop_names[screen_num_desktops] = NULL;
 797         for (; i < screen_num_desktops; ++i)
 798             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 799     }
 800 }
 801
 802 void screen_show_desktop(gboolean show)
 803 {
 804     GList *it;
 805
 806     if (show == screen_showing_desktop) return; /* no change */
 807
 808     screen_showing_desktop = show;
 809
 810     if (show) {
 811         /* bottom to top */
 812         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 813             if (WINDOW_IS_CLIENT(it->data)) {
 814                 ObClient *client = it->data;
 815                 if (client->frame->visible && !client_should_show(client))
 816                     frame_hide(client->frame);
 817             }
 818         }
 819     } else {
 820         /* top to bottom */
 821         for (it = stacking_list; it != NULL; it = it->next) {
 822             if (WINDOW_IS_CLIENT(it->data)) {
 823                 ObClient *client = it->data;
 824                 if (!client->frame->visible && client_should_show(client))
 825                     frame_show(client->frame);
 826             }
 827         }
 828     }
 829
 830     if (show) {
 831         /* focus desktop */
 832         for (it = focus_order[screen_desktop]; it; it = it->next)
 833             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 834                 client_focus(it->data))
 835                 break;
 836     } else {
 837         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 838     }
 839
 840     show = !!show; /* make it boolean */
 841     PROP_SET32(RootWindow(ob_display, ob_screen),
 842                net_showing_desktop, cardinal, show);
 843 }
 844
 845 void screen_install_colormap(ObClient *client, gboolean install)
 846 {
 847     XWindowAttributes wa;
 848
 849     if (client == NULL) {
 850         if (install)
 851             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 852         else
 853             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 854     } else {
 855         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 856             wa.colormap != None) {
 857             xerror_set_ignore(TRUE);
 858             if (install)
 859                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 860             else
 861                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 862             xerror_set_ignore(FALSE);
 863         }
 864     }
 865 }
 866
 867 void screen_update_areas()
 868 {
 869     guint i, x;
 870     guint32 *dims;
 871     GList *it;
 872
 873     g_free(monitor_area);
 874     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 875
 876     if (area) {
 877         for (i = 0; area[i]; ++i)
 878             g_free(area[i]);
 879         g_free(area);
 880     }
 881
 882     area = g_new(Rect*, screen_num_desktops + 2);
 883     for (i = 0; i < screen_num_desktops + 1; ++i)
 884         area[i] = g_new(Rect, screen_num_monitors + 1);
 885     area[i] = NULL;
 886
 887     dims = g_new(guint32, 4 * screen_num_desktops);
 888
 889     for (i = 0; i < screen_num_desktops + 1; ++i) {
 890         Strut s;
 891         int l, r, t, b;
 892
 893         /* calc the xinerama areas */
 894         for (x = 0; x < screen_num_monitors; ++x) {
 895             area[i][x] = monitor_area[x];
 896             if (x == 0) {
 897                 l = monitor_area[x].x;
 898                 t = monitor_area[x].y;
 899                 r = monitor_area[x].x + monitor_area[x].width - 1;
 900                 b = monitor_area[x].y + monitor_area[x].height - 1;
 901             } else {
 902                 l = MIN(l, monitor_area[x].x);
 903                 t = MIN(t, monitor_area[x].y);
 904                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 905                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 906             }
 907         }
 908         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 909
 910         /* apply struts */
 911         STRUT_SET(s, 0, 0, 0, 0);
 912         for (it = client_list; it; it = it->next)
 913             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 914         STRUT_ADD(s, dock_strut);
 915
 916         if (s.left) {
 917             int o;
 918
 919             /* find the left-most xin heads, i do this in 2 loops :| */
 920             o = area[i][0].x;
 921             for (x = 1; x < screen_num_monitors; ++x)
 922                 o = MIN(o, area[i][x].x);
 923
 924             for (x = 0; x < screen_num_monitors; ++x) {
 925                 int edge = o + s.left - area[i][x].x;
 926                 if (edge > 0) {
 927                     area[i][x].x += edge;
 928                     area[i][x].width -= edge;
 929                 }
 930             }
 931
 932             area[i][screen_num_monitors].x += s.left;
 933             area[i][screen_num_monitors].width -= s.left;
 934         }
 935         if (s.top) {
 936             int o;
 937
 938             /* find the left-most xin heads, i do this in 2 loops :| */
 939             o = area[i][0].y;
 940             for (x = 1; x < screen_num_monitors; ++x)
 941                 o = MIN(o, area[i][x].y);
 942
 943             for (x = 0; x < screen_num_monitors; ++x) {
 944                 int edge = o + s.top - area[i][x].y;
 945                 if (edge > 0) {
 946                     area[i][x].y += edge;
 947                     area[i][x].height -= edge;
 948                 }
 949             }
 950
 951             area[i][screen_num_monitors].y += s.top;
 952             area[i][screen_num_monitors].height -= s.top;
 953         }
 954         if (s.right) {
 955             int o;
 956
 957             /* find the bottom-most xin heads, i do this in 2 loops :| */
 958             o = area[i][0].x + area[i][0].width - 1;
 959             for (x = 1; x < screen_num_monitors; ++x)
 960                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 961
 962             for (x = 0; x < screen_num_monitors; ++x) {
 963                 int edge = (area[i][x].x + area[i][x].width - 1) -
 964                     (o - s.right);
 965                 if (edge > 0)
 966                     area[i][x].width -= edge;
 967             }
 968
 969             area[i][screen_num_monitors].width -= s.right;
 970         }
 971         if (s.bottom) {
 972             int o;
 973
 974             /* find the bottom-most xin heads, i do this in 2 loops :| */
 975             o = area[i][0].y + area[i][0].height - 1;
 976             for (x = 1; x < screen_num_monitors; ++x)
 977                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 978
 979             for (x = 0; x < screen_num_monitors; ++x) {
 980                 int edge = (area[i][x].y + area[i][x].height - 1) -
 981                     (o - s.bottom);
 982                 if (edge > 0)
 983                     area[i][x].height -= edge;
 984             }
 985
 986             area[i][screen_num_monitors].height -= s.bottom;
 987         }
 988
 989         /* XXX when dealing with partial struts, if its in a single
 990            xinerama area, then only subtract it from that area's space
 991         for (x = 0; x < screen_num_monitors; ++x) {
 992             GList *it;
 993
 994
 995                do something smart with it for the 'all xinerama areas' one...
 996
 997             for (it = client_list; it; it = it->next) {
 998
 999                 XXX if gunna test this shit, then gotta worry about when
1000                 the client moves between xinerama heads..
1001
1002                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
1003                                        area[i][x])) {
1004
1005                 }
1006             }
1007         }
1008         */
1009
1010         /* XXX optimize when this is run? */
1011
1012         /* the area has changed, adjust all the maximized
1013            windows */
1014         for (it = client_list; it; it = it->next) {
1015             ObClient *c = it->data;
1016             if (i < screen_num_desktops) {
1017                 if (c->desktop == i)
1018                     client_reconfigure(c);
1019             } else if (c->desktop == DESKTOP_ALL)
1020                 client_reconfigure(c);
1021         }
1022         if (i < screen_num_desktops) {
1023             /* don't set these for the 'all desktops' area */
1024             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1025             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1026             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1027             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1028         }
1029     }
1030     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1031                 dims, 4 * screen_num_desktops);
1032
1033     g_free(dims);
1034 }
1035
1036 Rect *screen_area(guint desktop)
1037 {
1038     return screen_area_monitor(desktop, screen_num_monitors);
1039 }
1040
1041 Rect *screen_area_monitor(guint desktop, guint head)
1042 {
1043     if (head > screen_num_monitors)
1044         return NULL;
1045     if (desktop >= screen_num_desktops) {
1046         if (desktop == DESKTOP_ALL)
1047             return &area[screen_num_desktops][head];
1048         return NULL;
1049     }
1050     return &area[desktop][head];
1051 }
1052
1053 Rect *screen_physical_area()
1054 {
1055     return screen_physical_area_monitor(screen_num_monitors);
1056 }
1057
1058 Rect *screen_physical_area_monitor(guint head)
1059 {
1060     if (head > screen_num_monitors)
1061         return NULL;
1062     return &monitor_area[head];
1063 }
1064
1065 static void set_root_cursor()
1066 {
1067 #ifdef USE_LIBSN
1068         if (sn_busy_cnt)
1069             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1070                           ob_cursor(OB_CURSOR_BUSY));
1071         else
1072 #endif
1073             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1074                           ob_cursor(OB_CURSOR_POINTER));
1075 }
1076
1077 #ifdef USE_LIBSN
1078 static gboolean sn_timeout(gpointer data)
1079 {
1080     sn_busy_cnt = 0;
1081
1082     set_root_cursor();
1083
1084     return FALSE; /* don't repeat */
1085 }
1086
1087 static void sn_event_func(SnMonitorEvent *ev, void *data)
1088 {
1089     SnStartupSequence *seq;
1090     const char *seq_id, *bin_name;
1091     int cnt = sn_busy_cnt;
1092
1093     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
1094         return;
1095
1096     seq_id = sn_startup_sequence_get_id(seq);
1097     bin_name = sn_startup_sequence_get_binary_name(seq);
1098
1099     if (!(seq_id && bin_name))
1100         return;
1101
1102     switch (sn_monitor_event_get_type(ev)) {
1103     case SN_MONITOR_EVENT_INITIATED:
1104         ++sn_busy_cnt;
1105         ob_main_loop_timeout_remove(ob_main_loop, sn_timeout);
1106         /* 30 second timeout for apps to start */
1107         ob_main_loop_timeout_add(ob_main_loop, 30 * G_USEC_PER_SEC,
1108                                  sn_timeout, NULL, NULL);
1109         break;
1110     case SN_MONITOR_EVENT_CHANGED:
1111         break;
1112     case SN_MONITOR_EVENT_COMPLETED:
1113         if (sn_busy_cnt) --sn_busy_cnt;
1114         ob_main_loop_timeout_remove(ob_main_loop, sn_timeout);
1115         break;
1116     case SN_MONITOR_EVENT_CANCELED:
1117         if (sn_busy_cnt) --sn_busy_cnt;
1118         ob_main_loop_timeout_remove(ob_main_loop, sn_timeout);
1119     };
1120
1121     if (sn_busy_cnt != cnt)
1122         set_root_cursor();
1123 }
1124 #endif
1125
1126 gboolean screen_pointer_pos(int *x, int *y)
1127 {
1128     Window w;
1129     int i;
1130     guint u;
1131
1132     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1133                            &w, &w, x, y, &i, &i, &u);
1134 }