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