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