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 "grab.h"
   8 #include "timer.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 "dispatch.h"
  16 #include "extensions.h"
  17 #include "render/render.h"
  18
  19 #ifdef USE_LIBSN
  20 #  define SN_API_NOT_YET_FROZEN
  21 #  include <libsn/sn.h>
  22 #endif
  23
  24 #include <X11/Xlib.h>
  25 #ifdef HAVE_UNISTD_H
  26 #  include <sys/types.h>
  27 #  include <unistd.h>
  28 #endif
  29 #include <assert.h>
  30
  31 /*! The event mask to grab on the root window */
  32 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  33                         EnterWindowMask | LeaveWindowMask | \
  34                         SubstructureNotifyMask | SubstructureRedirectMask | \
  35                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  36
  37 guint    screen_num_desktops;
  38 guint    screen_num_monitors;
  39 guint    screen_desktop;
  40 Size     screen_physical_size;
  41 gboolean screen_showing_desktop;
  42 DesktopLayout screen_desktop_layout;
  43 char   **screen_desktop_names;
  44 Window   screen_support_win;
  45
  46 static Rect  **area; /* array of desktop holding array of xinerama areas */
  47 static Rect  *monitor_area;
  48
  49 static Popup *desktop_cycle_popup;
  50
  51 #ifdef USE_LIBSN
  52 static SnMonitorContext *sn_context;
  53 static int sn_busy_cnt;
  54 static ObTimer *sn_timer;
  55
  56 static void sn_event_func(SnMonitorEvent *event, void *data);
  57 #endif
  58
  59 static void set_root_cursor();
  60
  61 static gboolean replace_wm()
  62 {
  63     char *wm_sn;
  64     Atom wm_sn_atom;
  65     Window current_wm_sn_owner;
  66     Time timestamp;
  67
  68     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  69     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  70
  71     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  72     if (current_wm_sn_owner) {
  73         if (!ob_replace_wm) {
  74             g_warning("A window manager is already running on screen %d",
  75                       ob_screen);
  76             return FALSE;
  77         }
  78         xerror_set_ignore(TRUE);
  79         xerror_occured = FALSE;
  80
  81         /* We want to find out when the current selection owner dies */
  82         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  83         XSync(ob_display, FALSE);
  84
  85         xerror_set_ignore(FALSE);
  86         if (xerror_occured)
  87             current_wm_sn_owner = None;
  88     }
  89
  90     {
  91         /* Generate a timestamp */
  92         XEvent event;
  93
  94         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
  95
  96         XChangeProperty(ob_display, screen_support_win,
  97                         prop_atoms.wm_class, prop_atoms.string,
  98                         8, PropModeAppend, NULL, 0);
  99         XWindowEvent(ob_display, screen_support_win,
 100                      PropertyChangeMask, &event);
 101
 102         XSelectInput(ob_display, screen_support_win, NoEventMask);
 103
 104         timestamp = event.xproperty.time;
 105     }
 106
 107     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 108                        timestamp);
 109
 110     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 111         g_warning("Could not acquire window manager selection on screen %d",
 112                   ob_screen);
 113         return FALSE;
 114     }
 115
 116     /* Wait for old window manager to go away */
 117     if (current_wm_sn_owner) {
 118       XEvent event;
 119       gulong wait = 0;
 120       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 121
 122       while (wait < timeout) {
 123           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 124                                 StructureNotifyMask, &event) &&
 125               event.type == DestroyNotify)
 126               break;
 127           g_usleep(G_USEC_PER_SEC / 10);
 128           wait += G_USEC_PER_SEC / 10;
 129       }
 130
 131       if (wait >= timeout) {
 132           g_warning("Timeout expired while waiting for the current WM to die "
 133                     "on screen %d", ob_screen);
 134           return FALSE;
 135       }
 136     }
 137
 138     /* Send client message indicating that we are now the WM */
 139     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 140                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 141
 142
 143     return TRUE;
 144 }
 145
 146 gboolean screen_annex()
 147 {
 148     XSetWindowAttributes attrib;
 149     pid_t pid;
 150     gint i, num_support;
 151     guint32 *supported;
 152
 153     /* create the netwm support window */
 154     attrib.override_redirect = TRUE;
 155     screen_support_win = XCreateWindow(ob_display,
 156                                        RootWindow(ob_display, ob_screen),
 157                                        -100, -100, 1, 1, 0,
 158                                        CopyFromParent, InputOutput,
 159                                        CopyFromParent,
 160                                        CWOverrideRedirect, &attrib);
 161     XMapRaised(ob_display, screen_support_win);
 162
 163     if (!replace_wm()) {
 164         XDestroyWindow(ob_display, screen_support_win);
 165         return FALSE;
 166     }
 167
 168     xerror_set_ignore(TRUE);
 169     xerror_occured = FALSE;
 170     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 171                  ROOT_EVENTMASK);
 172     xerror_set_ignore(FALSE);
 173     if (xerror_occured) {
 174         g_warning("A window manager is already running on screen %d",
 175                   ob_screen);
 176
 177         XDestroyWindow(ob_display, screen_support_win);
 178         return FALSE;
 179     }
 180
 181
 182     ob_debug("Managing screen %d\n", ob_screen);
 183
 184     set_root_cursor();
 185
 186     /* set the OPENBOX_PID hint */
 187     pid = getpid();
 188     PROP_SET32(RootWindow(ob_display, ob_screen),
 189                openbox_pid, cardinal, pid);
 190
 191     /* set supporting window */
 192     PROP_SET32(RootWindow(ob_display, ob_screen),
 193                net_supporting_wm_check, window, screen_support_win);
 194
 195     /* set properties on the supporting window */
 196     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 197     PROP_SET32(screen_support_win, net_supporting_wm_check,
 198                window, screen_support_win);
 199
 200     /* set the _NET_SUPPORTED_ATOMS hint */
 201     num_support = 50;
 202     i = 0;
 203     supported = g_new(guint32, num_support);
 204     supported[i++] = prop_atoms.net_current_desktop;
 205     supported[i++] = prop_atoms.net_number_of_desktops;
 206     supported[i++] = prop_atoms.net_desktop_geometry;
 207     supported[i++] = prop_atoms.net_desktop_viewport;
 208     supported[i++] = prop_atoms.net_active_window;
 209     supported[i++] = prop_atoms.net_workarea;
 210     supported[i++] = prop_atoms.net_client_list;
 211     supported[i++] = prop_atoms.net_client_list_stacking;
 212     supported[i++] = prop_atoms.net_desktop_names;
 213     supported[i++] = prop_atoms.net_close_window;
 214     supported[i++] = prop_atoms.net_desktop_layout;
 215     supported[i++] = prop_atoms.net_showing_desktop;
 216     supported[i++] = prop_atoms.net_wm_name;
 217     supported[i++] = prop_atoms.net_wm_visible_name;
 218     supported[i++] = prop_atoms.net_wm_icon_name;
 219     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 220     supported[i++] = prop_atoms.net_wm_desktop;
 221     supported[i++] = prop_atoms.net_wm_strut;
 222     supported[i++] = prop_atoms.net_wm_window_type;
 223     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 224     supported[i++] = prop_atoms.net_wm_window_type_dock;
 225     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 226     supported[i++] = prop_atoms.net_wm_window_type_menu;
 227     supported[i++] = prop_atoms.net_wm_window_type_utility;
 228     supported[i++] = prop_atoms.net_wm_window_type_splash;
 229     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 230     supported[i++] = prop_atoms.net_wm_window_type_normal;
 231     supported[i++] = prop_atoms.net_wm_allowed_actions;
 232     supported[i++] = prop_atoms.net_wm_action_move;
 233     supported[i++] = prop_atoms.net_wm_action_resize;
 234     supported[i++] = prop_atoms.net_wm_action_minimize;
 235     supported[i++] = prop_atoms.net_wm_action_shade;
 236     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 237     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 238     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 239     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 240     supported[i++] = prop_atoms.net_wm_action_close;
 241     supported[i++] = prop_atoms.net_wm_state;
 242     supported[i++] = prop_atoms.net_wm_state_modal;
 243     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 244     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 245     supported[i++] = prop_atoms.net_wm_state_shaded;
 246     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 247     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 248     supported[i++] = prop_atoms.net_wm_state_hidden;
 249     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 250     supported[i++] = prop_atoms.net_wm_state_above;
 251     supported[i++] = prop_atoms.net_wm_state_below;
 252     supported[i++] = prop_atoms.net_moveresize_window;
 253     supported[i++] = prop_atoms.net_wm_moveresize;
 254     g_assert(i == num_support);
 255 /*
 256   supported[] = prop_atoms.net_wm_action_stick;
 257 */
 258
 259     PROP_SETA32(RootWindow(ob_display, ob_screen),
 260                 net_supported, atom, supported, num_support);
 261     g_free(supported);
 262
 263     return TRUE;
 264 }
 265
 266 void screen_startup()
 267 {
 268     GSList *it;
 269     guint i;
 270
 271     desktop_cycle_popup = popup_new(FALSE);
 272
 273     /* get the initial size */
 274     screen_resize();
 275
 276     /* set the names */
 277     screen_desktop_names = g_new(char*,
 278                                  g_slist_length(config_desktops_names) + 1);
 279     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 280         screen_desktop_names[i] = it->data; /* dont strdup */
 281     screen_desktop_names[i] = NULL;
 282     PROP_SETSS(RootWindow(ob_display, ob_screen),
 283                net_desktop_names, screen_desktop_names);
 284     g_free(screen_desktop_names); /* dont free the individual strings */
 285     screen_desktop_names = NULL;
 286
 287     screen_num_desktops = 0;
 288     screen_set_num_desktops(config_desktops_num);
 289     if (startup_desktop >= screen_num_desktops)
 290         startup_desktop = 0;
 291     screen_desktop = startup_desktop;
 292     screen_set_desktop(startup_desktop);
 293
 294     /* don't start in showing-desktop mode */
 295     screen_showing_desktop = FALSE;
 296     PROP_SET32(RootWindow(ob_display, ob_screen),
 297                net_showing_desktop, cardinal, screen_showing_desktop);
 298
 299     screen_update_layout();
 300
 301 #ifdef USE_LIBSN
 302     sn_context = sn_monitor_context_new(ob_sn_display, ob_screen,
 303                                         sn_event_func, NULL, NULL);
 304     sn_busy_cnt = 0;
 305 #endif
 306 }
 307
 308 void screen_shutdown()
 309 {
 310     Rect **r;
 311
 312     popup_free(desktop_cycle_popup);
 313
 314     XSelectInput(ob_display, RootWindow(ob_display, ob_screen), NoEventMask);
 315
 316     /* we're not running here no more! */
 317     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 318     /* not without us */
 319     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 320     /* don't keep this mode */
 321     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 322
 323     XDestroyWindow(ob_display, screen_support_win);
 324
 325     g_strfreev(screen_desktop_names);
 326     for (r = area; *r; ++r)
 327         g_free(*r);
 328     g_free(area);
 329 }
 330
 331 void screen_resize()
 332 {
 333     static int oldw = 0, oldh = 0;
 334     int w, h;
 335     GList *it;
 336     guint32 geometry[2];
 337
 338     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 339     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 340
 341     if (w == oldw && h == oldh) return;
 342
 343     oldw = w; oldh = h;
 344
 345     /* Set the _NET_DESKTOP_GEOMETRY hint */
 346     screen_physical_size.width = geometry[0] = w;
 347     screen_physical_size.height = geometry[1] = h;
 348     PROP_SETA32(RootWindow(ob_display, ob_screen),
 349                 net_desktop_geometry, cardinal, geometry, 2);
 350
 351     if (ob_state() == OB_STATE_STARTING)
 352         return;
 353
 354     screen_update_areas();
 355     dock_configure();
 356
 357     for (it = client_list; it; it = it->next)
 358         client_move_onscreen(it->data, FALSE);
 359 }
 360
 361 void screen_set_num_desktops(guint num)
 362 {
 363     guint i, old;
 364     guint32 *viewport;
 365     GList *it;
 366
 367     g_assert(num > 0);
 368
 369     old = screen_num_desktops;
 370     screen_num_desktops = num;
 371     PROP_SET32(RootWindow(ob_display, ob_screen),
 372                net_number_of_desktops, cardinal, num);
 373
 374     /* set the viewport hint */
 375     viewport = g_new0(guint32, num * 2);
 376     PROP_SETA32(RootWindow(ob_display, ob_screen),
 377                 net_desktop_viewport, cardinal, viewport, num * 2);
 378     g_free(viewport);
 379
 380     /* the number of rows/columns will differ */
 381     screen_update_layout();
 382
 383     /* may be some unnamed desktops that we need to fill in with names */
 384     screen_update_desktop_names();
 385
 386     /* update the focus lists */
 387     /* free our lists for the desktops which have disappeared */
 388     for (i = num; i < old; ++i)
 389         g_list_free(focus_order[i]);
 390     /* realloc the array */
 391     focus_order = g_renew(GList*, focus_order, num);
 392     /* set the new lists to be empty */
 393     for (i = old; i < num; ++i)
 394         focus_order[i] = NULL;
 395
 396     /* move windows on desktops that will no longer exist! */
 397     for (it = client_list; it != NULL; it = it->next) {
 398         ObClient *c = it->data;
 399         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 400             client_set_desktop(c, num - 1, FALSE);
 401     }
 402
 403     /* change our struts/area to match (after moving windows) */
 404     screen_update_areas();
 405
 406     dispatch_ob(Event_Ob_NumDesktops, num, old);
 407
 408     /* change our desktop if we're on one that no longer exists! */
 409     if (screen_desktop >= screen_num_desktops)
 410         screen_set_desktop(num - 1);
 411 }
 412
 413 void screen_set_desktop(guint num)
 414 {
 415     GList *it;
 416     guint old;
 417     XEvent e;
 418
 419     g_assert(num < screen_num_desktops);
 420
 421     old = screen_desktop;
 422     screen_desktop = num;
 423     PROP_SET32(RootWindow(ob_display, ob_screen),
 424                net_current_desktop, cardinal, num);
 425
 426     if (old == num) return;
 427
 428     ob_debug("Moving to desktop %d\n", num+1);
 429
 430     /* show windows before hiding the rest to lessen the enter/leave events */
 431
 432     /* show windows from top to bottom */
 433     for (it = stacking_list; it != NULL; it = it->next) {
 434         if (WINDOW_IS_CLIENT(it->data)) {
 435             ObClient *c = it->data;
 436             if (!c->frame->visible && client_should_show(c))
 437                 frame_show(c->frame);
 438         }
 439     }
 440
 441     /* hide windows from bottom to top */
 442     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 443         if (WINDOW_IS_CLIENT(it->data)) {
 444             ObClient *c = it->data;
 445             if (c->frame->visible && !client_should_show(c))
 446                 frame_hide(c->frame);
 447         }
 448     }
 449
 450     /* focus the last focused window on the desktop, and ignore enter events
 451        from the switch so it doesnt mess with the focus */
 452     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 453 #ifdef DEBUG_FOCUS
 454     ob_debug("switch fallback\n");
 455 #endif
 456     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 457 #ifdef DEBUG_FOCUS
 458     ob_debug("/switch fallback\n");
 459 #endif
 460
 461     dispatch_ob(Event_Ob_Desktop, num, old);
 462 }
 463
 464 static void get_row_col(guint d, guint *r, guint *c)
 465 {
 466     switch (screen_desktop_layout.orientation) {
 467     case OB_ORIENTATION_HORZ:
 468         switch (screen_desktop_layout.start_corner) {
 469         case OB_CORNER_TOPLEFT:
 470             *r = d / screen_desktop_layout.columns;
 471             *c = d % screen_desktop_layout.columns;
 472             break;
 473         case OB_CORNER_BOTTOMLEFT:
 474             *r = screen_desktop_layout.rows - 1 -
 475                 d / screen_desktop_layout.columns;
 476             *c = d % screen_desktop_layout.columns;
 477             break;
 478         case OB_CORNER_TOPRIGHT:
 479             *r = d / screen_desktop_layout.columns;
 480             *c = screen_desktop_layout.columns - 1 -
 481                 d % screen_desktop_layout.columns;
 482             break;
 483         case OB_CORNER_BOTTOMRIGHT:
 484             *r = screen_desktop_layout.rows - 1 -
 485                 d / screen_desktop_layout.columns;
 486             *c = screen_desktop_layout.columns - 1 -
 487                 d % screen_desktop_layout.columns;
 488             break;
 489         }
 490         break;
 491     case OB_ORIENTATION_VERT:
 492         switch (screen_desktop_layout.start_corner) {
 493         case OB_CORNER_TOPLEFT:
 494             *r = d % screen_desktop_layout.rows;
 495             *c = d / screen_desktop_layout.rows;
 496             break;
 497         case OB_CORNER_BOTTOMLEFT:
 498             *r = screen_desktop_layout.rows - 1 -
 499                 d % screen_desktop_layout.rows;
 500             *c = d / screen_desktop_layout.rows;
 501             break;
 502         case OB_CORNER_TOPRIGHT:
 503             *r = d % screen_desktop_layout.rows;
 504             *c = screen_desktop_layout.columns - 1 -
 505                 d / screen_desktop_layout.rows;
 506             break;
 507         case OB_CORNER_BOTTOMRIGHT:
 508             *r = screen_desktop_layout.rows - 1 -
 509                 d % screen_desktop_layout.rows;
 510             *c = screen_desktop_layout.columns - 1 -
 511                 d / screen_desktop_layout.rows;
 512             break;
 513         }
 514         break;
 515     }
 516 }
 517
 518 static guint translate_row_col(guint r, guint c)
 519 {
 520     switch (screen_desktop_layout.orientation) {
 521     case OB_ORIENTATION_HORZ:
 522         switch (screen_desktop_layout.start_corner) {
 523         case OB_CORNER_TOPLEFT:
 524             return r % screen_desktop_layout.rows *
 525                 screen_desktop_layout.columns +
 526                 c % screen_desktop_layout.columns;
 527         case OB_CORNER_BOTTOMLEFT:
 528             return (screen_desktop_layout.rows - 1 -
 529                     r % screen_desktop_layout.rows) *
 530                 screen_desktop_layout.columns +
 531                 c % screen_desktop_layout.columns;
 532         case OB_CORNER_TOPRIGHT:
 533             return r % screen_desktop_layout.rows *
 534                 screen_desktop_layout.columns +
 535                 (screen_desktop_layout.columns - 1 -
 536                  c % screen_desktop_layout.columns);
 537         case OB_CORNER_BOTTOMRIGHT:
 538             return (screen_desktop_layout.rows - 1 -
 539                     r % screen_desktop_layout.rows) *
 540                 screen_desktop_layout.columns +
 541                 (screen_desktop_layout.columns - 1 -
 542                  c % screen_desktop_layout.columns);
 543         }
 544     case OB_ORIENTATION_VERT:
 545         switch (screen_desktop_layout.start_corner) {
 546         case OB_CORNER_TOPLEFT:
 547             return c % screen_desktop_layout.columns *
 548                 screen_desktop_layout.rows +
 549                 r % screen_desktop_layout.rows;
 550         case OB_CORNER_BOTTOMLEFT:
 551             return c % screen_desktop_layout.columns *
 552                 screen_desktop_layout.rows +
 553                 (screen_desktop_layout.rows - 1 -
 554                  r % screen_desktop_layout.rows);
 555         case OB_CORNER_TOPRIGHT:
 556             return (screen_desktop_layout.columns - 1 -
 557                     c % screen_desktop_layout.columns) *
 558                 screen_desktop_layout.rows +
 559                 r % screen_desktop_layout.rows;
 560         case OB_CORNER_BOTTOMRIGHT:
 561             return (screen_desktop_layout.columns - 1 -
 562                     c % screen_desktop_layout.columns) *
 563                 screen_desktop_layout.rows +
 564                 (screen_desktop_layout.rows - 1 -
 565                  r % screen_desktop_layout.rows);
 566         }
 567     }
 568     g_assert_not_reached();
 569     return 0;
 570 }
 571
 572 static void popup_cycle(guint d, gboolean show)
 573 {
 574     Rect *a;
 575
 576     if (!show) {
 577         popup_hide(desktop_cycle_popup);
 578     } else {
 579         a = screen_physical_area_monitor(0);
 580         popup_position(desktop_cycle_popup, CenterGravity,
 581                        a->x + a->width / 2, a->y + a->height / 2);
 582         /* XXX the size and the font extents need to be related on some level
 583          */
 584         popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 585
 586         popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 587
 588         popup_show(desktop_cycle_popup,
 589                    screen_desktop_names[d], NULL);
 590     }
 591 }
 592
 593 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 594                            gboolean done, gboolean cancel)
 595 {
 596     static gboolean first = TRUE;
 597     static gboolean lin;
 598     static guint origd, d;
 599     guint r, c;
 600
 601     if (cancel) {
 602         d = origd;
 603         goto done_cycle;
 604     } else if (done) {
 605         screen_set_desktop(d);
 606         goto done_cycle;
 607     }
 608     if (first) {
 609         first = FALSE;
 610         lin = linear;
 611         d = origd = screen_desktop;
 612     }
 613
 614     get_row_col(d, &r, &c);
 615
 616     if (lin) {
 617         switch (dir) {
 618         case OB_DIRECTION_EAST:
 619             if (d < screen_num_desktops - 1)
 620                 ++d;
 621             else if (wrap)
 622                 d = 0;
 623             break;
 624         case OB_DIRECTION_WEST:
 625             if (d > 0)
 626                 --d;
 627             else if (wrap)
 628                 d = screen_num_desktops - 1;
 629             break;
 630         default:
 631             assert(0);
 632             return screen_desktop;
 633         }
 634     } else {
 635         switch (dir) {
 636         case OB_DIRECTION_EAST:
 637             ++c;
 638             if (c >= screen_desktop_layout.columns) {
 639                 if (!wrap) return d = screen_desktop;
 640                 c = 0;
 641             }
 642             d = translate_row_col(r, c);
 643             if (d >= screen_num_desktops) {
 644                 if (!wrap) return d = screen_desktop;
 645                 ++c;
 646             }
 647             break;
 648         case OB_DIRECTION_WEST:
 649             --c;
 650             if (c >= screen_desktop_layout.columns) {
 651                 if (!wrap) return d = screen_desktop;
 652                 c = screen_desktop_layout.columns - 1;
 653             }
 654             d = translate_row_col(r, c);
 655             if (d >= screen_num_desktops) {
 656                 if (!wrap) return d = screen_desktop;
 657                 --c;
 658             }
 659             break;
 660         case OB_DIRECTION_SOUTH:
 661             ++r;
 662             if (r >= screen_desktop_layout.rows) {
 663                 if (!wrap) return d = screen_desktop;
 664                 r = 0;
 665             }
 666             d = translate_row_col(r, c);
 667             if (d >= screen_num_desktops) {
 668                 if (!wrap) return d = screen_desktop;
 669                 ++r;
 670             }
 671             break;
 672         case OB_DIRECTION_NORTH:
 673             --r;
 674             if (r >= screen_desktop_layout.rows) {
 675                 if (!wrap) return d = screen_desktop;
 676                 r = screen_desktop_layout.rows - 1;
 677             }
 678             d = translate_row_col(r, c);
 679             if (d >= screen_num_desktops) {
 680                 if (!wrap) return d = screen_desktop;
 681                 --r;
 682             }
 683             break;
 684         default:
 685             assert(0);
 686             return d = screen_desktop;
 687         }
 688
 689         d = translate_row_col(r, c);
 690     }
 691
 692     if (config_desktop_popup) {
 693         popup_cycle(d, TRUE);
 694         return d;
 695     }
 696
 697 done_cycle:
 698     first = TRUE;
 699
 700     popup_cycle(0, FALSE);
 701
 702     return d;
 703 }
 704
 705 void screen_update_layout()
 706 {
 707     ObOrientation orient;
 708     ObCorner corner;
 709     guint rows;
 710     guint cols;
 711     guint32 *data;
 712     guint num;
 713     gboolean valid = FALSE;
 714
 715     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 716                     net_desktop_layout, cardinal, &data, &num)) {
 717         if (num == 3 || num == 4) {
 718
 719             if (data[0] == prop_atoms.net_wm_orientation_vert)
 720                 orient = OB_ORIENTATION_VERT;
 721             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 722                 orient = OB_ORIENTATION_HORZ;
 723             else
 724                 goto screen_update_layout_bail;
 725
 726             if (num < 4)
 727                 corner = OB_CORNER_TOPLEFT;
 728             else {
 729                 if (data[3] == prop_atoms.net_wm_topleft)
 730                     corner = OB_CORNER_TOPLEFT;
 731                 else if (data[3] == prop_atoms.net_wm_topright)
 732                     corner = OB_CORNER_TOPRIGHT;
 733                 else if (data[3] == prop_atoms.net_wm_bottomright)
 734                     corner = OB_CORNER_BOTTOMRIGHT;
 735                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 736                     corner = OB_CORNER_BOTTOMLEFT;
 737                 else
 738                     goto screen_update_layout_bail;
 739             }
 740
 741             /* fill in a zero rows/columns */
 742             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 743                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 744                 goto screen_update_layout_bail;
 745             } else {
 746                 if (data[1] == 0) {
 747                     data[1] = (screen_num_desktops +
 748                                screen_num_desktops % data[2]) / data[2];
 749                 } else if (data[2] == 0) {
 750                     data[2] = (screen_num_desktops +
 751                                screen_num_desktops % data[1]) / data[1];
 752                 }
 753                 cols = data[1];
 754                 rows = data[2];
 755             }
 756
 757             /* bounds checking */
 758             if (orient == OB_ORIENTATION_HORZ) {
 759                 rows = MIN(rows, screen_num_desktops);
 760                 cols = MIN(cols, ((screen_num_desktops +
 761                                      (screen_num_desktops % rows)) / rows));
 762             } else {
 763                 cols = MIN(cols, screen_num_desktops);
 764                 rows = MIN(rows, ((screen_num_desktops +
 765                                      (screen_num_desktops % cols)) / cols));
 766             }
 767
 768             valid = TRUE;
 769         }
 770     screen_update_layout_bail:
 771         g_free(data);
 772     }
 773
 774     if (!valid) {
 775         /* defaults */
 776         orient = OB_ORIENTATION_HORZ;
 777         corner = OB_CORNER_TOPLEFT;
 778         rows = 1;
 779         cols = screen_num_desktops;
 780     }
 781
 782     screen_desktop_layout.orientation = orient;
 783     screen_desktop_layout.start_corner = corner;
 784     screen_desktop_layout.rows = rows;
 785     screen_desktop_layout.columns = cols;
 786 }
 787
 788 void screen_update_desktop_names()
 789 {
 790     guint i;
 791
 792     /* empty the array */
 793     g_strfreev(screen_desktop_names);
 794     screen_desktop_names = NULL;
 795
 796     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 797                    net_desktop_names, utf8, &screen_desktop_names))
 798         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 799     else
 800         i = 0;
 801     if (i <= screen_num_desktops) {
 802         screen_desktop_names = g_renew(char*, screen_desktop_names,
 803                                        screen_num_desktops + 1);
 804         screen_desktop_names[screen_num_desktops] = NULL;
 805         for (; i < screen_num_desktops; ++i)
 806             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 807     }
 808 }
 809
 810 void screen_show_desktop(gboolean show)
 811 {
 812     GList *it;
 813
 814     if (show == screen_showing_desktop) return; /* no change */
 815
 816     screen_showing_desktop = show;
 817
 818     if (show) {
 819         /* bottom to top */
 820         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 821             if (WINDOW_IS_CLIENT(it->data)) {
 822                 ObClient *client = it->data;
 823                 if (client->frame->visible && !client_should_show(client))
 824                     frame_hide(client->frame);
 825             }
 826         }
 827     } else {
 828         /* top to bottom */
 829         for (it = stacking_list; it != NULL; it = it->next) {
 830             if (WINDOW_IS_CLIENT(it->data)) {
 831                 ObClient *client = it->data;
 832                 if (!client->frame->visible && client_should_show(client))
 833                     frame_show(client->frame);
 834             }
 835         }
 836     }
 837
 838     if (show) {
 839         /* focus desktop */
 840         for (it = focus_order[screen_desktop]; it; it = it->next)
 841             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 842                 client_focus(it->data))
 843                 break;
 844     } else {
 845         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 846     }
 847
 848     show = !!show; /* make it boolean */
 849     PROP_SET32(RootWindow(ob_display, ob_screen),
 850                net_showing_desktop, cardinal, show);
 851
 852     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
 853 }
 854
 855 void screen_install_colormap(ObClient *client, gboolean install)
 856 {
 857     XWindowAttributes wa;
 858
 859     if (client == NULL) {
 860         if (install)
 861             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 862         else
 863             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 864     } else {
 865         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 866             wa.colormap != None) {
 867             xerror_set_ignore(TRUE);
 868             if (install)
 869                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 870             else
 871                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 872             xerror_set_ignore(FALSE);
 873         }
 874     }
 875 }
 876
 877 void screen_update_areas()
 878 {
 879     guint i, x;
 880     guint32 *dims;
 881     GList *it;
 882
 883     g_free(monitor_area);
 884     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 885
 886     if (area) {
 887         for (i = 0; area[i]; ++i)
 888             g_free(area[i]);
 889         g_free(area);
 890     }
 891
 892     area = g_new(Rect*, screen_num_desktops + 2);
 893     for (i = 0; i < screen_num_desktops + 1; ++i)
 894         area[i] = g_new(Rect, screen_num_monitors + 1);
 895     area[i] = NULL;
 896
 897     dims = g_new(guint32, 4 * screen_num_desktops);
 898
 899     for (i = 0; i < screen_num_desktops + 1; ++i) {
 900         Strut s;
 901         int l, r, t, b;
 902
 903         /* calc the xinerama areas */
 904         for (x = 0; x < screen_num_monitors; ++x) {
 905             area[i][x] = monitor_area[x];
 906             if (x == 0) {
 907                 l = monitor_area[x].x;
 908                 t = monitor_area[x].y;
 909                 r = monitor_area[x].x + monitor_area[x].width - 1;
 910                 b = monitor_area[x].y + monitor_area[x].height - 1;
 911             } else {
 912                 l = MIN(l, monitor_area[x].x);
 913                 t = MIN(t, monitor_area[x].y);
 914                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 915                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 916             }
 917         }
 918         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 919
 920         /* apply struts */
 921         STRUT_SET(s, 0, 0, 0, 0);
 922         for (it = client_list; it; it = it->next)
 923             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 924         STRUT_ADD(s, dock_strut);
 925
 926         if (s.left) {
 927             int o;
 928
 929             /* find the left-most xin heads, i do this in 2 loops :| */
 930             o = area[i][0].x;
 931             for (x = 1; x < screen_num_monitors; ++x)
 932                 o = MIN(o, area[i][x].x);
 933
 934             for (x = 0; x < screen_num_monitors; ++x) {
 935                 int edge = o + s.left - area[i][x].x;
 936                 if (edge > 0) {
 937                     area[i][x].x += edge;
 938                     area[i][x].width -= edge;
 939                 }
 940             }
 941
 942             area[i][screen_num_monitors].x += s.left;
 943             area[i][screen_num_monitors].width -= s.left;
 944         }
 945         if (s.top) {
 946             int o;
 947
 948             /* find the left-most xin heads, i do this in 2 loops :| */
 949             o = area[i][0].y;
 950             for (x = 1; x < screen_num_monitors; ++x)
 951                 o = MIN(o, area[i][x].y);
 952
 953             for (x = 0; x < screen_num_monitors; ++x) {
 954                 int edge = o + s.top - area[i][x].y;
 955                 if (edge > 0) {
 956                     area[i][x].y += edge;
 957                     area[i][x].height -= edge;
 958                 }
 959             }
 960
 961             area[i][screen_num_monitors].y += s.top;
 962             area[i][screen_num_monitors].height -= s.top;
 963         }
 964         if (s.right) {
 965             int o;
 966
 967             /* find the bottom-most xin heads, i do this in 2 loops :| */
 968             o = area[i][0].x + area[i][0].width - 1;
 969             for (x = 1; x < screen_num_monitors; ++x)
 970                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 971
 972             for (x = 0; x < screen_num_monitors; ++x) {
 973                 int edge = (area[i][x].x + area[i][x].width - 1) -
 974                     (o - s.right);
 975                 if (edge > 0)
 976                     area[i][x].width -= edge;
 977             }
 978
 979             area[i][screen_num_monitors].width -= s.right;
 980         }
 981         if (s.bottom) {
 982             int o;
 983
 984             /* find the bottom-most xin heads, i do this in 2 loops :| */
 985             o = area[i][0].y + area[i][0].height - 1;
 986             for (x = 1; x < screen_num_monitors; ++x)
 987                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 988
 989             for (x = 0; x < screen_num_monitors; ++x) {
 990                 int edge = (area[i][x].y + area[i][x].height - 1) -
 991                     (o - s.bottom);
 992                 if (edge > 0)
 993                     area[i][x].height -= edge;
 994             }
 995
 996             area[i][screen_num_monitors].height -= s.bottom;
 997         }
 998
 999         /* XXX when dealing with partial struts, if its in a single
1000            xinerama area, then only subtract it from that area's space
1001         for (x = 0; x < screen_num_monitors; ++x) {
1002             GList *it;
1003
1004
1005                do something smart with it for the 'all xinerama areas' one...
1006
1007             for (it = client_list; it; it = it->next) {
1008
1009                 XXX if gunna test this shit, then gotta worry about when
1010                 the client moves between xinerama heads..
1011
1012                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
1013                                        area[i][x])) {
1014
1015                 }
1016             }
1017         }
1018         */
1019
1020         /* XXX optimize when this is run? */
1021
1022         /* the area has changed, adjust all the maximized
1023            windows */
1024         for (it = client_list; it; it = it->next) {
1025             ObClient *c = it->data;
1026             if (i < screen_num_desktops) {
1027                 if (c->desktop == i)
1028                     client_reconfigure(c);
1029             } else if (c->desktop == DESKTOP_ALL)
1030                 client_reconfigure(c);
1031         }
1032         if (i < screen_num_desktops) {
1033             /* don't set these for the 'all desktops' area */
1034             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1035             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1036             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1037             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1038         }
1039     }
1040     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1041                 dims, 4 * screen_num_desktops);
1042
1043     g_free(dims);
1044 }
1045
1046 Rect *screen_area(guint desktop)
1047 {
1048     return screen_area_monitor(desktop, screen_num_monitors);
1049 }
1050
1051 Rect *screen_area_monitor(guint desktop, guint head)
1052 {
1053     if (head > screen_num_monitors)
1054         return NULL;
1055     if (desktop >= screen_num_desktops) {
1056         if (desktop == DESKTOP_ALL)
1057             return &area[screen_num_desktops][head];
1058         return NULL;
1059     }
1060     return &area[desktop][head];
1061 }
1062
1063 Rect *screen_physical_area()
1064 {
1065     return screen_physical_area_monitor(screen_num_monitors);
1066 }
1067
1068 Rect *screen_physical_area_monitor(guint head)
1069 {
1070     if (head > screen_num_monitors)
1071         return NULL;
1072     return &monitor_area[head];
1073 }
1074
1075 static void set_root_cursor()
1076 {
1077 #ifdef USE_LIBSN
1078         if (sn_busy_cnt)
1079             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1080                           ob_cursor(OB_CURSOR_BUSY));
1081         else
1082 #endif
1083             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1084                           ob_cursor(OB_CURSOR_POINTER));
1085 }
1086
1087 #ifdef USE_LIBSN
1088 static void sn_timeout(ObTimer *t, void *data)
1089 {
1090     timer_stop(sn_timer);
1091     sn_timer = NULL;
1092     sn_busy_cnt = 0;
1093
1094     set_root_cursor();
1095 }
1096
1097 static void sn_event_func(SnMonitorEvent *ev, void *data)
1098 {
1099     SnStartupSequence *seq;
1100     const char *seq_id, *bin_name;
1101     int cnt = sn_busy_cnt;
1102
1103     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
1104         return;
1105
1106     seq_id = sn_startup_sequence_get_id(seq);
1107     bin_name = sn_startup_sequence_get_binary_name(seq);
1108
1109     if (!(seq_id && bin_name))
1110         return;
1111
1112     switch (sn_monitor_event_get_type(ev)) {
1113     case SN_MONITOR_EVENT_INITIATED:
1114         ++sn_busy_cnt;
1115         if (sn_timer)
1116             timer_stop(sn_timer);
1117         /* 30 second timeout for apps to start */
1118         sn_timer = timer_start(30 * 1000000, sn_timeout, NULL);
1119         break;
1120     case SN_MONITOR_EVENT_CHANGED:
1121         break;
1122     case SN_MONITOR_EVENT_COMPLETED:
1123         if (sn_busy_cnt) --sn_busy_cnt;
1124         if (sn_timer) {
1125             timer_stop(sn_timer);
1126             sn_timer = NULL;
1127         }
1128         break;
1129     case SN_MONITOR_EVENT_CANCELED:
1130         if (sn_busy_cnt) --sn_busy_cnt;
1131         if (sn_timer) {
1132             timer_stop(sn_timer);
1133             sn_timer = NULL;
1134         }
1135     };
1136
1137     if (sn_busy_cnt != cnt)
1138         set_root_cursor();
1139 }
1140 #endif
1141
1142 gboolean screen_pointer_pos(int *x, int *y)
1143 {
1144     Window w;
1145     int i;
1146     guint u;
1147
1148     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1149                            &w, &w, x, y, &i, &i, &u);
1150 }