openbox/screen.c

   1 #include "debug.h"
   2 #include "openbox.h"
   3 #include "mainloop.h"
   4 #include "dock.h"
   5 #include "xerror.h"
   6 #include "prop.h"
   7 #include "startup.h"
   8 #include "grab.h"
   9 #include "config.h"
  10 #include "screen.h"
  11 #include "client.h"
  12 #include "frame.h"
  13 #include "focus.h"
  14 #include "popup.h"
  15 #include "extensions.h"
  16 #include "render/render.h"
  17
  18 #ifdef USE_LIBSN
  19 #  define SN_API_NOT_YET_FROZEN
  20 #  include <libsn/sn.h>
  21 #endif
  22
  23 #include <X11/Xlib.h>
  24 #ifdef HAVE_UNISTD_H
  25 #  include <sys/types.h>
  26 #  include <unistd.h>
  27 #endif
  28 #include <assert.h>
  29
  30 /*! The event mask to grab on the root window */
  31 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  32                         EnterWindowMask | LeaveWindowMask | \
  33                         SubstructureNotifyMask | SubstructureRedirectMask | \
  34                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  35
  36 guint    screen_num_desktops;
  37 guint    screen_num_monitors;
  38 guint    screen_desktop;
  39 guint    screen_last_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
  55 static void sn_event_func(SnMonitorEvent *event, void *data);
  56 #endif
  57
  58 static void set_root_cursor();
  59
  60 static gboolean replace_wm()
  61 {
  62     char *wm_sn;
  63     Atom wm_sn_atom;
  64     Window current_wm_sn_owner;
  65     Time timestamp;
  66
  67     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  68     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  69     g_free(wm_sn);
  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     /* change our desktop if we're on one that no longer exists! */
 405     if (screen_desktop >= screen_num_desktops)
 406         screen_set_desktop(num - 1);
 407 }
 408
 409 void screen_set_desktop(guint num)
 410 {
 411     GList *it;
 412     guint old;
 413     XEvent e;
 414
 415     g_assert(num < screen_num_desktops);
 416
 417     old = screen_desktop;
 418     screen_desktop = num;
 419     PROP_SET32(RootWindow(ob_display, ob_screen),
 420                net_current_desktop, cardinal, num);
 421
 422     if (old == num) return;
 423
 424     screen_last_desktop = old;
 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
 460 static void get_row_col(guint d, guint *r, guint *c)
 461 {
 462     switch (screen_desktop_layout.orientation) {
 463     case OB_ORIENTATION_HORZ:
 464         switch (screen_desktop_layout.start_corner) {
 465         case OB_CORNER_TOPLEFT:
 466             *r = d / screen_desktop_layout.columns;
 467             *c = d % screen_desktop_layout.columns;
 468             break;
 469         case OB_CORNER_BOTTOMLEFT:
 470             *r = screen_desktop_layout.rows - 1 -
 471                 d / screen_desktop_layout.columns;
 472             *c = d % screen_desktop_layout.columns;
 473             break;
 474         case OB_CORNER_TOPRIGHT:
 475             *r = d / screen_desktop_layout.columns;
 476             *c = screen_desktop_layout.columns - 1 -
 477                 d % screen_desktop_layout.columns;
 478             break;
 479         case OB_CORNER_BOTTOMRIGHT:
 480             *r = screen_desktop_layout.rows - 1 -
 481                 d / screen_desktop_layout.columns;
 482             *c = screen_desktop_layout.columns - 1 -
 483                 d % screen_desktop_layout.columns;
 484             break;
 485         }
 486         break;
 487     case OB_ORIENTATION_VERT:
 488         switch (screen_desktop_layout.start_corner) {
 489         case OB_CORNER_TOPLEFT:
 490             *r = d % screen_desktop_layout.rows;
 491             *c = d / screen_desktop_layout.rows;
 492             break;
 493         case OB_CORNER_BOTTOMLEFT:
 494             *r = screen_desktop_layout.rows - 1 -
 495                 d % screen_desktop_layout.rows;
 496             *c = d / screen_desktop_layout.rows;
 497             break;
 498         case OB_CORNER_TOPRIGHT:
 499             *r = d % screen_desktop_layout.rows;
 500             *c = screen_desktop_layout.columns - 1 -
 501                 d / screen_desktop_layout.rows;
 502             break;
 503         case OB_CORNER_BOTTOMRIGHT:
 504             *r = screen_desktop_layout.rows - 1 -
 505                 d % screen_desktop_layout.rows;
 506             *c = screen_desktop_layout.columns - 1 -
 507                 d / screen_desktop_layout.rows;
 508             break;
 509         }
 510         break;
 511     }
 512 }
 513
 514 static guint translate_row_col(guint r, guint c)
 515 {
 516     switch (screen_desktop_layout.orientation) {
 517     case OB_ORIENTATION_HORZ:
 518         switch (screen_desktop_layout.start_corner) {
 519         case OB_CORNER_TOPLEFT:
 520             return r % screen_desktop_layout.rows *
 521                 screen_desktop_layout.columns +
 522                 c % screen_desktop_layout.columns;
 523         case OB_CORNER_BOTTOMLEFT:
 524             return (screen_desktop_layout.rows - 1 -
 525                     r % screen_desktop_layout.rows) *
 526                 screen_desktop_layout.columns +
 527                 c % screen_desktop_layout.columns;
 528         case OB_CORNER_TOPRIGHT:
 529             return r % screen_desktop_layout.rows *
 530                 screen_desktop_layout.columns +
 531                 (screen_desktop_layout.columns - 1 -
 532                  c % screen_desktop_layout.columns);
 533         case OB_CORNER_BOTTOMRIGHT:
 534             return (screen_desktop_layout.rows - 1 -
 535                     r % screen_desktop_layout.rows) *
 536                 screen_desktop_layout.columns +
 537                 (screen_desktop_layout.columns - 1 -
 538                  c % screen_desktop_layout.columns);
 539         }
 540     case OB_ORIENTATION_VERT:
 541         switch (screen_desktop_layout.start_corner) {
 542         case OB_CORNER_TOPLEFT:
 543             return c % screen_desktop_layout.columns *
 544                 screen_desktop_layout.rows +
 545                 r % screen_desktop_layout.rows;
 546         case OB_CORNER_BOTTOMLEFT:
 547             return c % screen_desktop_layout.columns *
 548                 screen_desktop_layout.rows +
 549                 (screen_desktop_layout.rows - 1 -
 550                  r % screen_desktop_layout.rows);
 551         case OB_CORNER_TOPRIGHT:
 552             return (screen_desktop_layout.columns - 1 -
 553                     c % screen_desktop_layout.columns) *
 554                 screen_desktop_layout.rows +
 555                 r % screen_desktop_layout.rows;
 556         case OB_CORNER_BOTTOMRIGHT:
 557             return (screen_desktop_layout.columns - 1 -
 558                     c % screen_desktop_layout.columns) *
 559                 screen_desktop_layout.rows +
 560                 (screen_desktop_layout.rows - 1 -
 561                  r % screen_desktop_layout.rows);
 562         }
 563     }
 564     g_assert_not_reached();
 565     return 0;
 566 }
 567
 568 static void popup_cycle(guint d, gboolean show)
 569 {
 570     Rect *a;
 571
 572     if (!show) {
 573         popup_hide(desktop_cycle_popup);
 574     } else {
 575         a = screen_physical_area_monitor(0);
 576         popup_position(desktop_cycle_popup, CenterGravity,
 577                        a->x + a->width / 2, a->y + a->height / 2);
 578         /* XXX the size and the font extents need to be related on some level
 579          */
 580         popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 581
 582         popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 583
 584         popup_show(desktop_cycle_popup,
 585                    screen_desktop_names[d], NULL);
 586     }
 587 }
 588
 589 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 590                            gboolean dialog, gboolean done, gboolean cancel)
 591 {
 592     static gboolean first = TRUE;
 593     static gboolean lin;
 594     static guint origd, d;
 595     guint r, c;
 596
 597     if (cancel) {
 598         d = origd;
 599         goto done_cycle;
 600     } else if (done && dialog) {
 601         goto done_cycle;
 602     }
 603     if (first) {
 604         first = FALSE;
 605         lin = linear;
 606         d = origd = screen_desktop;
 607     }
 608
 609     get_row_col(d, &r, &c);
 610
 611     if (lin) {
 612         switch (dir) {
 613         case OB_DIRECTION_EAST:
 614             if (d < screen_num_desktops - 1)
 615                 ++d;
 616             else if (wrap)
 617                 d = 0;
 618             break;
 619         case OB_DIRECTION_WEST:
 620             if (d > 0)
 621                 --d;
 622             else if (wrap)
 623                 d = screen_num_desktops - 1;
 624             break;
 625         default:
 626             assert(0);
 627             return screen_desktop;
 628         }
 629     } else {
 630         switch (dir) {
 631         case OB_DIRECTION_EAST:
 632             ++c;
 633             if (c >= screen_desktop_layout.columns) {
 634                 if (!wrap) return d = screen_desktop;
 635                 c = 0;
 636             }
 637             d = translate_row_col(r, c);
 638             if (d >= screen_num_desktops) {
 639                 if (!wrap) return d = screen_desktop;
 640                 ++c;
 641             }
 642             break;
 643         case OB_DIRECTION_WEST:
 644             --c;
 645             if (c >= screen_desktop_layout.columns) {
 646                 if (!wrap) return d = screen_desktop;
 647                 c = screen_desktop_layout.columns - 1;
 648             }
 649             d = translate_row_col(r, c);
 650             if (d >= screen_num_desktops) {
 651                 if (!wrap) return d = screen_desktop;
 652                 --c;
 653             }
 654             break;
 655         case OB_DIRECTION_SOUTH:
 656             ++r;
 657             if (r >= screen_desktop_layout.rows) {
 658                 if (!wrap) return d = screen_desktop;
 659                 r = 0;
 660             }
 661             d = translate_row_col(r, c);
 662             if (d >= screen_num_desktops) {
 663                 if (!wrap) return d = screen_desktop;
 664                 ++r;
 665             }
 666             break;
 667         case OB_DIRECTION_NORTH:
 668             --r;
 669             if (r >= screen_desktop_layout.rows) {
 670                 if (!wrap) return d = screen_desktop;
 671                 r = screen_desktop_layout.rows - 1;
 672             }
 673             d = translate_row_col(r, c);
 674             if (d >= screen_num_desktops) {
 675                 if (!wrap) return d = screen_desktop;
 676                 --r;
 677             }
 678             break;
 679         default:
 680             assert(0);
 681             return d = screen_desktop;
 682         }
 683
 684         d = translate_row_col(r, c);
 685     }
 686
 687     if (dialog) {
 688         popup_cycle(d, TRUE);
 689         return d;
 690     }
 691
 692 done_cycle:
 693     first = TRUE;
 694
 695     popup_cycle(0, FALSE);
 696
 697     return d;
 698 }
 699
 700 void screen_update_layout()
 701 {
 702     ObOrientation orient;
 703     ObCorner corner;
 704     guint rows;
 705     guint cols;
 706     guint32 *data;
 707     guint num;
 708     gboolean valid = FALSE;
 709
 710     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 711                     net_desktop_layout, cardinal, &data, &num)) {
 712         if (num == 3 || num == 4) {
 713
 714             if (data[0] == prop_atoms.net_wm_orientation_vert)
 715                 orient = OB_ORIENTATION_VERT;
 716             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 717                 orient = OB_ORIENTATION_HORZ;
 718             else
 719                 goto screen_update_layout_bail;
 720
 721             if (num < 4)
 722                 corner = OB_CORNER_TOPLEFT;
 723             else {
 724                 if (data[3] == prop_atoms.net_wm_topleft)
 725                     corner = OB_CORNER_TOPLEFT;
 726                 else if (data[3] == prop_atoms.net_wm_topright)
 727                     corner = OB_CORNER_TOPRIGHT;
 728                 else if (data[3] == prop_atoms.net_wm_bottomright)
 729                     corner = OB_CORNER_BOTTOMRIGHT;
 730                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 731                     corner = OB_CORNER_BOTTOMLEFT;
 732                 else
 733                     goto screen_update_layout_bail;
 734             }
 735
 736             /* fill in a zero rows/columns */
 737             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 738                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 739                 goto screen_update_layout_bail;
 740             } else {
 741                 if (data[1] == 0) {
 742                     data[1] = (screen_num_desktops +
 743                                screen_num_desktops % data[2]) / data[2];
 744                 } else if (data[2] == 0) {
 745                     data[2] = (screen_num_desktops +
 746                                screen_num_desktops % data[1]) / data[1];
 747                 }
 748                 cols = data[1];
 749                 rows = data[2];
 750             }
 751
 752             /* bounds checking */
 753             if (orient == OB_ORIENTATION_HORZ) {
 754                 rows = MIN(rows, screen_num_desktops);
 755                 cols = MIN(cols, ((screen_num_desktops +
 756                                      (screen_num_desktops % rows)) / rows));
 757             } else {
 758                 cols = MIN(cols, screen_num_desktops);
 759                 rows = MIN(rows, ((screen_num_desktops +
 760                                      (screen_num_desktops % cols)) / cols));
 761             }
 762
 763             valid = TRUE;
 764         }
 765     screen_update_layout_bail:
 766         g_free(data);
 767     }
 768
 769     if (!valid) {
 770         /* defaults */
 771         orient = OB_ORIENTATION_HORZ;
 772         corner = OB_CORNER_TOPLEFT;
 773         rows = 1;
 774         cols = screen_num_desktops;
 775     }
 776
 777     screen_desktop_layout.orientation = orient;
 778     screen_desktop_layout.start_corner = corner;
 779     screen_desktop_layout.rows = rows;
 780     screen_desktop_layout.columns = cols;
 781 }
 782
 783 void screen_update_desktop_names()
 784 {
 785     guint i;
 786
 787     /* empty the array */
 788     g_strfreev(screen_desktop_names);
 789     screen_desktop_names = NULL;
 790
 791     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 792                    net_desktop_names, utf8, &screen_desktop_names))
 793         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 794     else
 795         i = 0;
 796     if (i <= screen_num_desktops) {
 797         screen_desktop_names = g_renew(char*, screen_desktop_names,
 798                                        screen_num_desktops + 1);
 799         screen_desktop_names[screen_num_desktops] = NULL;
 800         for (; i < screen_num_desktops; ++i)
 801             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 802     }
 803 }
 804
 805 void screen_show_desktop(gboolean show)
 806 {
 807     GList *it;
 808
 809     if (show == screen_showing_desktop) return; /* no change */
 810
 811     screen_showing_desktop = show;
 812
 813     if (show) {
 814         /* bottom to top */
 815         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 816             if (WINDOW_IS_CLIENT(it->data)) {
 817                 ObClient *client = it->data;
 818                 if (client->frame->visible && !client_should_show(client))
 819                     frame_hide(client->frame);
 820             }
 821         }
 822     } else {
 823         /* top to bottom */
 824         for (it = stacking_list; it != NULL; it = it->next) {
 825             if (WINDOW_IS_CLIENT(it->data)) {
 826                 ObClient *client = it->data;
 827                 if (!client->frame->visible && client_should_show(client))
 828                     frame_show(client->frame);
 829             }
 830         }
 831     }
 832
 833     if (show) {
 834         /* focus desktop */
 835         for (it = focus_order[screen_desktop]; it; it = it->next)
 836             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 837                 client_focus(it->data))
 838                 break;
 839     } else {
 840         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 841     }
 842
 843     show = !!show; /* make it boolean */
 844     PROP_SET32(RootWindow(ob_display, ob_screen),
 845                net_showing_desktop, cardinal, show);
 846 }
 847
 848 void screen_install_colormap(ObClient *client, gboolean install)
 849 {
 850     XWindowAttributes wa;
 851
 852     if (client == NULL) {
 853         if (install)
 854             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 855         else
 856             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 857     } else {
 858         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 859             wa.colormap != None) {
 860             xerror_set_ignore(TRUE);
 861             if (install)
 862                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 863             else
 864                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 865             xerror_set_ignore(FALSE);
 866         }
 867     }
 868 }
 869
 870 void screen_update_areas()
 871 {
 872     guint i, x;
 873     guint32 *dims;
 874     GList *it;
 875
 876     g_free(monitor_area);
 877     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 878
 879     if (area) {
 880         for (i = 0; area[i]; ++i)
 881             g_free(area[i]);
 882         g_free(area);
 883     }
 884
 885     area = g_new(Rect*, screen_num_desktops + 2);
 886     for (i = 0; i < screen_num_desktops + 1; ++i)
 887         area[i] = g_new(Rect, screen_num_monitors + 1);
 888     area[i] = NULL;
 889
 890     dims = g_new(guint32, 4 * screen_num_desktops);
 891
 892     for (i = 0; i < screen_num_desktops + 1; ++i) {
 893         Strut s;
 894         int l, r, t, b;
 895
 896         /* calc the xinerama areas */
 897         for (x = 0; x < screen_num_monitors; ++x) {
 898             area[i][x] = monitor_area[x];
 899             if (x == 0) {
 900                 l = monitor_area[x].x;
 901                 t = monitor_area[x].y;
 902                 r = monitor_area[x].x + monitor_area[x].width - 1;
 903                 b = monitor_area[x].y + monitor_area[x].height - 1;
 904             } else {
 905                 l = MIN(l, monitor_area[x].x);
 906                 t = MIN(t, monitor_area[x].y);
 907                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 908                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 909             }
 910         }
 911         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 912
 913         /* apply struts */
 914         STRUT_SET(s, 0, 0, 0, 0);
 915         for (it = client_list; it; it = it->next)
 916             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 917         STRUT_ADD(s, dock_strut);
 918
 919         if (s.left) {
 920             int o;
 921
 922             /* find the left-most xin heads, i do this in 2 loops :| */
 923             o = area[i][0].x;
 924             for (x = 1; x < screen_num_monitors; ++x)
 925                 o = MIN(o, area[i][x].x);
 926
 927             for (x = 0; x < screen_num_monitors; ++x) {
 928                 int edge = o + s.left - area[i][x].x;
 929                 if (edge > 0) {
 930                     area[i][x].x += edge;
 931                     area[i][x].width -= edge;
 932                 }
 933             }
 934
 935             area[i][screen_num_monitors].x += s.left;
 936             area[i][screen_num_monitors].width -= s.left;
 937         }
 938         if (s.top) {
 939             int o;
 940
 941             /* find the left-most xin heads, i do this in 2 loops :| */
 942             o = area[i][0].y;
 943             for (x = 1; x < screen_num_monitors; ++x)
 944                 o = MIN(o, area[i][x].y);
 945
 946             for (x = 0; x < screen_num_monitors; ++x) {
 947                 int edge = o + s.top - area[i][x].y;
 948                 if (edge > 0) {
 949                     area[i][x].y += edge;
 950                     area[i][x].height -= edge;
 951                 }
 952             }
 953
 954             area[i][screen_num_monitors].y += s.top;
 955             area[i][screen_num_monitors].height -= s.top;
 956         }
 957         if (s.right) {
 958             int o;
 959
 960             /* find the bottom-most xin heads, i do this in 2 loops :| */
 961             o = area[i][0].x + area[i][0].width - 1;
 962             for (x = 1; x < screen_num_monitors; ++x)
 963                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 964
 965             for (x = 0; x < screen_num_monitors; ++x) {
 966                 int edge = (area[i][x].x + area[i][x].width - 1) -
 967                     (o - s.right);
 968                 if (edge > 0)
 969                     area[i][x].width -= edge;
 970             }
 971
 972             area[i][screen_num_monitors].width -= s.right;
 973         }
 974         if (s.bottom) {
 975             int o;
 976
 977             /* find the bottom-most xin heads, i do this in 2 loops :| */
 978             o = area[i][0].y + area[i][0].height - 1;
 979             for (x = 1; x < screen_num_monitors; ++x)
 980                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 981
 982             for (x = 0; x < screen_num_monitors; ++x) {
 983                 int edge = (area[i][x].y + area[i][x].height - 1) -
 984                     (o - s.bottom);
 985                 if (edge > 0)
 986                     area[i][x].height -= edge;
 987             }
 988
 989             area[i][screen_num_monitors].height -= s.bottom;
 990         }
 991
 992         /* XXX when dealing with partial struts, if its in a single
 993            xinerama area, then only subtract it from that area's space
 994         for (x = 0; x < screen_num_monitors; ++x) {
 995             GList *it;
 996
 997
 998                do something smart with it for the 'all xinerama areas' one...
 999
1000             for (it = client_list; it; it = it->next) {
1001
1002                 XXX if gunna test this shit, then gotta worry about when
1003                 the client moves between xinerama heads..
1004
1005                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
1006                                        area[i][x])) {
1007
1008                 }
1009             }
1010         }
1011         */
1012
1013         /* XXX optimize when this is run? */
1014
1015         /* the area has changed, adjust all the maximized
1016            windows */
1017         for (it = client_list; it; it = it->next) {
1018             ObClient *c = it->data;
1019             if (i < screen_num_desktops) {
1020                 if (c->desktop == i)
1021                     client_reconfigure(c);
1022             } else if (c->desktop == DESKTOP_ALL)
1023                 client_reconfigure(c);
1024         }
1025         if (i < screen_num_desktops) {
1026             /* don't set these for the 'all desktops' area */
1027             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1028             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1029             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1030             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1031         }
1032     }
1033     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1034                 dims, 4 * screen_num_desktops);
1035
1036     g_free(dims);
1037 }
1038
1039 Rect *screen_area(guint desktop)
1040 {
1041     return screen_area_monitor(desktop, screen_num_monitors);
1042 }
1043
1044 Rect *screen_area_monitor(guint desktop, guint head)
1045 {
1046     if (head > screen_num_monitors)
1047         return NULL;
1048     if (desktop >= screen_num_desktops) {
1049         if (desktop == DESKTOP_ALL)
1050             return &area[screen_num_desktops][head];
1051         return NULL;
1052     }
1053     return &area[desktop][head];
1054 }
1055
1056 Rect *screen_physical_area()
1057 {
1058     return screen_physical_area_monitor(screen_num_monitors);
1059 }
1060
1061 Rect *screen_physical_area_monitor(guint head)
1062 {
1063     if (head > screen_num_monitors)
1064         return NULL;
1065     return &monitor_area[head];
1066 }
1067
1068 static void set_root_cursor()
1069 {
1070 #ifdef USE_LIBSN
1071         if (sn_busy_cnt)
1072             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1073                           ob_cursor(OB_CURSOR_BUSY));
1074         else
1075 #endif
1076             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1077                           ob_cursor(OB_CURSOR_POINTER));
1078 }
1079
1080 #ifdef USE_LIBSN
1081 static gboolean sn_timeout(gpointer data)
1082 {
1083     sn_busy_cnt = 0;
1084
1085     set_root_cursor();
1086
1087     return FALSE; /* don't repeat */
1088 }
1089
1090 static void sn_event_func(SnMonitorEvent *ev, void *data)
1091 {
1092     SnStartupSequence *seq;
1093     const char *seq_id, *bin_name;
1094     int cnt = sn_busy_cnt;
1095
1096     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
1097         return;
1098
1099     seq_id = sn_startup_sequence_get_id(seq);
1100     bin_name = sn_startup_sequence_get_binary_name(seq);
1101
1102     if (!(seq_id && bin_name))
1103         return;
1104
1105     switch (sn_monitor_event_get_type(ev)) {
1106     case SN_MONITOR_EVENT_INITIATED:
1107         ++sn_busy_cnt;
1108         ob_main_loop_timeout_remove(ob_main_loop, sn_timeout);
1109         /* 30 second timeout for apps to start */
1110         ob_main_loop_timeout_add(ob_main_loop, 30 * G_USEC_PER_SEC,
1111                                  sn_timeout, NULL, NULL);
1112         break;
1113     case SN_MONITOR_EVENT_CHANGED:
1114         break;
1115     case SN_MONITOR_EVENT_COMPLETED:
1116         if (sn_busy_cnt) --sn_busy_cnt;
1117         ob_main_loop_timeout_remove(ob_main_loop, sn_timeout);
1118         break;
1119     case SN_MONITOR_EVENT_CANCELED:
1120         if (sn_busy_cnt) --sn_busy_cnt;
1121         ob_main_loop_timeout_remove(ob_main_loop, sn_timeout);
1122     };
1123
1124     if (sn_busy_cnt != cnt)
1125         set_root_cursor();
1126 }
1127 #endif
1128
1129 gboolean screen_pointer_pos(int *x, int *y)
1130 {
1131     Window w;
1132     int i;
1133     guint u;
1134
1135     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1136                            &w, &w, x, y, &i, &i, &u);
1137 }