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 "timer.h"
   8 #include "config.h"
   9 #include "screen.h"
  10 #include "client.h"
  11 #include "frame.h"
  12 #include "focus.h"
  13 #include "popup.h"
  14 #include "dispatch.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
  29 /*! The event mask to grab on the root window */
  30 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  31                         EnterWindowMask | LeaveWindowMask | \
  32                         SubstructureNotifyMask | SubstructureRedirectMask | \
  33                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  34
  35 guint    screen_num_desktops;
  36 guint    screen_num_monitors;
  37 guint    screen_desktop;
  38 Size     screen_physical_size;
  39 gboolean screen_showing_desktop;
  40 DesktopLayout screen_desktop_layout;
  41 char   **screen_desktop_names;
  42 Window   screen_support_win;
  43
  44 static Rect  **area; /* array of desktop holding array of xinerama areas */
  45 static Rect  *monitor_area;
  46
  47 static Popup *desktop_cycle_popup;
  48 static ObTimer *popup_timer = NULL;
  49
  50 #ifdef USE_LIBSN
  51 static SnMonitorContext *sn_context;
  52 static int sn_busy_cnt;
  53 static ObTimer *sn_timer;
  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
  70     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  71     if (current_wm_sn_owner) {
  72         if (!ob_replace_wm) {
  73             g_warning("A window manager is already running on screen %d",
  74                       ob_screen);
  75             return FALSE;
  76         }
  77         xerror_set_ignore(TRUE);
  78         xerror_occured = FALSE;
  79
  80         /* We want to find out when the current selection owner dies */
  81         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  82         XSync(ob_display, FALSE);
  83
  84         xerror_set_ignore(FALSE);
  85         if (xerror_occured)
  86             current_wm_sn_owner = None;
  87     }
  88
  89     {
  90         /* Generate a timestamp */
  91         XEvent event;
  92
  93         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
  94
  95         XChangeProperty(ob_display, screen_support_win,
  96                         prop_atoms.wm_class, prop_atoms.string,
  97                         8, PropModeAppend, NULL, 0);
  98         XWindowEvent(ob_display, screen_support_win,
  99                      PropertyChangeMask, &event);
 100
 101         XSelectInput(ob_display, screen_support_win, NoEventMask);
 102
 103         timestamp = event.xproperty.time;
 104     }
 105
 106     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 107                        timestamp);
 108
 109     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 110         g_warning("Could not acquire window manager selection on screen %d",
 111                   ob_screen);
 112         return FALSE;
 113     }
 114
 115     /* Wait for old window manager to go away */
 116     if (current_wm_sn_owner) {
 117       XEvent event;
 118       gulong wait = 0;
 119       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 120
 121       while (wait < timeout) {
 122           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 123                                 StructureNotifyMask, &event) &&
 124               event.type == DestroyNotify)
 125               break;
 126           g_usleep(G_USEC_PER_SEC / 10);
 127           wait += G_USEC_PER_SEC / 10;
 128       }
 129
 130       if (wait >= timeout) {
 131           g_warning("Timeout expired while waiting for the current WM to die "
 132                     "on screen %d", ob_screen);
 133           return FALSE;
 134       }
 135     }
 136
 137     /* Send client message indicating that we are now the WM */
 138     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 139                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 140
 141
 142     return TRUE;
 143 }
 144
 145 gboolean screen_annex()
 146 {
 147     XSetWindowAttributes attrib;
 148     pid_t pid;
 149     gint i, num_support;
 150     guint32 *supported;
 151
 152     /* create the netwm support window */
 153     attrib.override_redirect = TRUE;
 154     screen_support_win = XCreateWindow(ob_display,
 155                                        RootWindow(ob_display, ob_screen),
 156                                        -100, -100, 1, 1, 0,
 157                                        CopyFromParent, InputOutput,
 158                                        CopyFromParent,
 159                                        CWOverrideRedirect, &attrib);
 160     XMapRaised(ob_display, screen_support_win);
 161
 162     if (!replace_wm()) {
 163         XDestroyWindow(ob_display, screen_support_win);
 164         return FALSE;
 165     }
 166
 167     xerror_set_ignore(TRUE);
 168     xerror_occured = FALSE;
 169     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 170                  ROOT_EVENTMASK);
 171     xerror_set_ignore(FALSE);
 172     if (xerror_occured) {
 173         g_warning("A window manager is already running on screen %d",
 174                   ob_screen);
 175
 176         XDestroyWindow(ob_display, screen_support_win);
 177         return FALSE;
 178     }
 179
 180
 181     ob_debug("Managing screen %d\n", ob_screen);
 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 = 61;
 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     supported[i++] = prop_atoms.net_wm_moveresize_size_topleft;
 254     supported[i++] = prop_atoms.net_wm_moveresize_size_top;
 255     supported[i++] = prop_atoms.net_wm_moveresize_size_topright;
 256     supported[i++] = prop_atoms.net_wm_moveresize_size_right;
 257     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomright;
 258     supported[i++] = prop_atoms.net_wm_moveresize_size_bottom;
 259     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomleft;
 260     supported[i++] = prop_atoms.net_wm_moveresize_size_left;
 261     supported[i++] = prop_atoms.net_wm_moveresize_move;
 262     supported[i++] = prop_atoms.net_wm_moveresize_size_keyboard;
 263     supported[i++] = prop_atoms.net_wm_moveresize_move_keyboard;
 264     g_assert(i == num_support);
 265 /*
 266   supported[] = prop_atoms.net_wm_action_stick;
 267 */
 268
 269     PROP_SETA32(RootWindow(ob_display, ob_screen),
 270                 net_supported, atom, supported, num_support);
 271     g_free(supported);
 272
 273     return TRUE;
 274 }
 275
 276 void screen_startup()
 277 {
 278     GSList *it;
 279     guint i;
 280
 281     desktop_cycle_popup = popup_new(FALSE);
 282
 283     /* get the initial size */
 284     screen_resize();
 285
 286     /* set the names */
 287     screen_desktop_names = g_new(char*,
 288                                  g_slist_length(config_desktops_names) + 1);
 289     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 290         screen_desktop_names[i] = it->data; /* dont strdup */
 291     screen_desktop_names[i] = NULL;
 292     PROP_SETSS(RootWindow(ob_display, ob_screen),
 293                net_desktop_names, screen_desktop_names);
 294     g_free(screen_desktop_names); /* dont free the individual strings */
 295     screen_desktop_names = NULL;
 296
 297     screen_num_desktops = 0;
 298     screen_set_num_desktops(config_desktops_num);
 299     if (startup_desktop >= screen_num_desktops)
 300         startup_desktop = 0;
 301     screen_desktop = startup_desktop;
 302     screen_set_desktop(startup_desktop);
 303
 304     /* don't start in showing-desktop mode */
 305     screen_showing_desktop = FALSE;
 306     PROP_SET32(RootWindow(ob_display, ob_screen),
 307                net_showing_desktop, cardinal, screen_showing_desktop);
 308
 309     screen_update_layout();
 310
 311 #ifdef USE_LIBSN
 312     sn_context = sn_monitor_context_new(ob_sn_display, ob_screen,
 313                                         sn_event_func, NULL, NULL);
 314     sn_busy_cnt = 0;
 315 #endif
 316 }
 317
 318 void screen_shutdown()
 319 {
 320     Rect **r;
 321
 322     popup_free(desktop_cycle_popup);
 323
 324     XSelectInput(ob_display, RootWindow(ob_display, ob_screen), NoEventMask);
 325
 326     /* we're not running here no more! */
 327     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 328     /* not without us */
 329     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 330     /* don't keep this mode */
 331     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 332
 333     XDestroyWindow(ob_display, screen_support_win);
 334
 335     g_strfreev(screen_desktop_names);
 336     for (r = area; *r; ++r)
 337         g_free(*r);
 338     g_free(area);
 339 }
 340
 341 void screen_resize()
 342 {
 343     static int oldw = 0, oldh = 0;
 344     int w, h;
 345     GList *it;
 346     guint32 geometry[2];
 347
 348     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 349     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 350
 351     if (w == oldw && h == oldh) return;
 352
 353     oldw = w; oldh = h;
 354
 355     /* Set the _NET_DESKTOP_GEOMETRY hint */
 356     screen_physical_size.width = geometry[0] = w;
 357     screen_physical_size.height = geometry[1] = h;
 358     PROP_SETA32(RootWindow(ob_display, ob_screen),
 359                 net_desktop_geometry, cardinal, geometry, 2);
 360
 361     if (ob_state() == OB_STATE_STARTING)
 362         return;
 363
 364     screen_update_areas();
 365     dock_configure();
 366
 367     for (it = client_list; it; it = it->next)
 368         client_move_onscreen(it->data, FALSE);
 369 }
 370
 371 void screen_set_num_desktops(guint num)
 372 {
 373     guint i, old;
 374     guint32 *viewport;
 375     GList *it;
 376
 377     g_assert(num > 0);
 378
 379     old = screen_num_desktops;
 380     screen_num_desktops = num;
 381     PROP_SET32(RootWindow(ob_display, ob_screen),
 382                net_number_of_desktops, cardinal, num);
 383
 384     /* set the viewport hint */
 385     viewport = g_new0(guint32, num * 2);
 386     PROP_SETA32(RootWindow(ob_display, ob_screen),
 387                 net_desktop_viewport, cardinal, viewport, num * 2);
 388     g_free(viewport);
 389
 390     /* the number of rows/columns will differ */
 391     screen_update_layout();
 392
 393     /* may be some unnamed desktops that we need to fill in with names */
 394     screen_update_desktop_names();
 395
 396     /* update the focus lists */
 397     /* free our lists for the desktops which have disappeared */
 398     for (i = num; i < old; ++i)
 399         g_list_free(focus_order[i]);
 400     /* realloc the array */
 401     focus_order = g_renew(GList*, focus_order, num);
 402     /* set the new lists to be empty */
 403     for (i = old; i < num; ++i)
 404         focus_order[i] = NULL;
 405
 406     /* move windows on desktops that will no longer exist! */
 407     for (it = client_list; it != NULL; it = it->next) {
 408         ObClient *c = it->data;
 409         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 410             client_set_desktop(c, num - 1, FALSE);
 411     }
 412
 413     /* change our struts/area to match (after moving windows) */
 414     screen_update_areas();
 415
 416     dispatch_ob(Event_Ob_NumDesktops, num, old);
 417
 418     /* change our desktop if we're on one that no longer exists! */
 419     if (screen_desktop >= screen_num_desktops)
 420         screen_set_desktop(num - 1);
 421 }
 422
 423 static void popup_cycle_hide(ObTimer *t, void *d)
 424 {
 425     timer_stop(t);
 426     popup_timer = NULL;
 427
 428     popup_hide(desktop_cycle_popup);
 429 }
 430
 431 static void popup_cycle_show()
 432 {
 433     Rect *a;
 434
 435     a = screen_physical_area_monitor(0);
 436     popup_position(desktop_cycle_popup, CenterGravity,
 437                    a->x + a->width / 2, a->y + a->height / 2);
 438     /* XXX the size and the font extents need to be related on some level
 439      */
 440     popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 441
 442     popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 443
 444     popup_show(desktop_cycle_popup,
 445                screen_desktop_names[screen_desktop], NULL);
 446
 447     g_message("%s", screen_desktop_names[screen_desktop]);
 448
 449     if (popup_timer) timer_stop(popup_timer);
 450     popup_timer = timer_start(G_USEC_PER_SEC / 2, popup_cycle_hide, NULL);
 451 }
 452
 453 void screen_set_desktop(guint num)
 454 {
 455     GList *it;
 456     guint old;
 457     XEvent e;
 458
 459     g_assert(num < screen_num_desktops);
 460
 461     old = screen_desktop;
 462     screen_desktop = num;
 463     PROP_SET32(RootWindow(ob_display, ob_screen),
 464                net_current_desktop, cardinal, num);
 465
 466     if (old == num) return;
 467
 468     ob_debug("Moving to desktop %d\n", num+1);
 469
 470     /* show windows before hiding the rest to lessen the enter/leave events */
 471
 472     /* show windows from top to bottom */
 473     for (it = stacking_list; it != NULL; it = it->next) {
 474         if (WINDOW_IS_CLIENT(it->data)) {
 475             ObClient *c = it->data;
 476             if (!c->frame->visible && client_should_show(c))
 477                 frame_show(c->frame);
 478         }
 479     }
 480
 481     /* hide windows from bottom to top */
 482     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 483         if (WINDOW_IS_CLIENT(it->data)) {
 484             ObClient *c = it->data;
 485             if (c->frame->visible && !client_should_show(c))
 486                 frame_hide(c->frame);
 487         }
 488     }
 489
 490     /* focus the last focused window on the desktop, and ignore enter events
 491        from the switch so it doesnt mess with the focus */
 492     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 493 #ifdef DEBUG_FOCUS
 494     ob_debug("switch fallback\n");
 495 #endif
 496     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 497 #ifdef DEBUG_FOCUS
 498     ob_debug("/switch fallback\n");
 499 #endif
 500
 501     if (ob_state() == OB_STATE_RUNNING)
 502         popup_cycle_show();
 503
 504     dispatch_ob(Event_Ob_Desktop, num, old);
 505 }
 506
 507 void screen_update_layout()
 508 {
 509     ObOrientation orient;
 510     ObCorner corner;
 511     guint rows;
 512     guint cols;
 513     guint32 *data;
 514     guint num;
 515     gboolean valid = FALSE;
 516
 517     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 518                     net_desktop_layout, cardinal, &data, &num)) {
 519         if (num == 3 || num == 4) {
 520
 521             if (data[0] == prop_atoms.net_wm_orientation_vert)
 522                 orient = OB_ORIENTATION_VERT;
 523             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 524                 orient = OB_ORIENTATION_HORZ;
 525             else
 526                 goto screen_update_layout_bail;
 527
 528             if (num < 4)
 529                 corner = OB_CORNER_TOPLEFT;
 530             else {
 531                 if (data[3] == prop_atoms.net_wm_topleft)
 532                     corner = OB_CORNER_TOPLEFT;
 533                 else if (data[3] == prop_atoms.net_wm_topright)
 534                     corner = OB_CORNER_TOPRIGHT;
 535                 else if (data[3] == prop_atoms.net_wm_bottomright)
 536                     corner = OB_CORNER_BOTTOMRIGHT;
 537                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 538                     corner = OB_CORNER_BOTTOMLEFT;
 539                 else
 540                     goto screen_update_layout_bail;
 541             }
 542
 543             /* fill in a zero rows/columns */
 544             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 545                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 546                 goto screen_update_layout_bail;
 547             } else {
 548                 if (data[1] == 0) {
 549                     data[1] = (screen_num_desktops +
 550                                screen_num_desktops % data[2]) / data[2];
 551                 } else if (data[2] == 0) {
 552                     data[2] = (screen_num_desktops +
 553                                screen_num_desktops % data[1]) / data[1];
 554                 }
 555                 cols = data[1];
 556                 rows = data[2];
 557             }
 558
 559             /* bounds checking */
 560             if (orient == OB_ORIENTATION_HORZ) {
 561                 rows = MIN(rows, screen_num_desktops);
 562                 cols = MIN(cols, ((screen_num_desktops +
 563                                      (screen_num_desktops % rows)) / rows));
 564             } else {
 565                 cols = MIN(cols, screen_num_desktops);
 566                 rows = MIN(rows, ((screen_num_desktops +
 567                                      (screen_num_desktops % cols)) / cols));
 568             }
 569
 570             valid = TRUE;
 571         }
 572     screen_update_layout_bail:
 573         g_free(data);
 574     }
 575
 576     if (!valid) {
 577         /* defaults */
 578         orient = OB_ORIENTATION_HORZ;
 579         corner = OB_CORNER_TOPLEFT;
 580         rows = 1;
 581         cols = screen_num_desktops;
 582     }
 583
 584     screen_desktop_layout.orientation = orient;
 585     screen_desktop_layout.start_corner = corner;
 586     screen_desktop_layout.rows = rows;
 587     screen_desktop_layout.columns = cols;
 588 }
 589
 590 void screen_update_desktop_names()
 591 {
 592     guint i;
 593
 594     /* empty the array */
 595     g_strfreev(screen_desktop_names);
 596     screen_desktop_names = NULL;
 597
 598     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 599                    net_desktop_names, utf8, &screen_desktop_names))
 600         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 601     else
 602         i = 0;
 603     if (i <= screen_num_desktops) {
 604         screen_desktop_names = g_renew(char*, screen_desktop_names,
 605                                        screen_num_desktops + 1);
 606         screen_desktop_names[screen_num_desktops] = NULL;
 607         for (; i < screen_num_desktops; ++i)
 608             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 609     }
 610 }
 611
 612 void screen_show_desktop(gboolean show)
 613 {
 614     GList *it;
 615
 616     if (show == screen_showing_desktop) return; /* no change */
 617
 618     screen_showing_desktop = show;
 619
 620     if (show) {
 621         /* bottom to top */
 622         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 623             if (WINDOW_IS_CLIENT(it->data)) {
 624                 ObClient *client = it->data;
 625                 if (client->frame->visible && !client_should_show(client))
 626                     frame_hide(client->frame);
 627             }
 628         }
 629     } else {
 630         /* top to bottom */
 631         for (it = stacking_list; it != NULL; it = it->next) {
 632             if (WINDOW_IS_CLIENT(it->data)) {
 633                 ObClient *client = it->data;
 634                 if (!client->frame->visible && client_should_show(client))
 635                     frame_show(client->frame);
 636             }
 637         }
 638     }
 639
 640     if (show) {
 641         /* focus desktop */
 642         for (it = focus_order[screen_desktop]; it; it = it->next)
 643             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 644                 client_focus(it->data))
 645                 break;
 646     } else {
 647         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 648     }
 649
 650     show = !!show; /* make it boolean */
 651     PROP_SET32(RootWindow(ob_display, ob_screen),
 652                net_showing_desktop, cardinal, show);
 653
 654     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
 655 }
 656
 657 void screen_install_colormap(ObClient *client, gboolean install)
 658 {
 659     XWindowAttributes wa;
 660
 661     if (client == NULL) {
 662         if (install)
 663             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 664         else
 665             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 666     } else {
 667         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 668             wa.colormap != None) {
 669             xerror_set_ignore(TRUE);
 670             if (install)
 671                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 672             else
 673                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 674             xerror_set_ignore(FALSE);
 675         }
 676     }
 677 }
 678
 679 void screen_update_areas()
 680 {
 681     guint i, x;
 682     guint32 *dims;
 683     GList *it;
 684
 685     g_free(monitor_area);
 686     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 687
 688     if (area) {
 689         for (i = 0; area[i]; ++i)
 690             g_free(area[i]);
 691         g_free(area);
 692     }
 693
 694     area = g_new(Rect*, screen_num_desktops + 2);
 695     for (i = 0; i < screen_num_desktops + 1; ++i)
 696         area[i] = g_new(Rect, screen_num_monitors + 1);
 697     area[i] = NULL;
 698
 699     dims = g_new(guint32, 4 * screen_num_desktops);
 700
 701     for (i = 0; i < screen_num_desktops + 1; ++i) {
 702         Strut s;
 703         int l, r, t, b;
 704
 705         /* calc the xinerama areas */
 706         for (x = 0; x < screen_num_monitors; ++x) {
 707             area[i][x] = monitor_area[x];
 708             if (x == 0) {
 709                 l = monitor_area[x].x;
 710                 t = monitor_area[x].y;
 711                 r = monitor_area[x].x + monitor_area[x].width - 1;
 712                 b = monitor_area[x].y + monitor_area[x].height - 1;
 713             } else {
 714                 l = MIN(l, monitor_area[x].x);
 715                 t = MIN(t, monitor_area[x].y);
 716                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 717                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 718             }
 719         }
 720         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 721
 722         /* apply struts */
 723         STRUT_SET(s, 0, 0, 0, 0);
 724         for (it = client_list; it; it = it->next)
 725             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 726         STRUT_ADD(s, dock_strut);
 727
 728         if (s.left) {
 729             int o;
 730
 731             /* find the left-most xin heads, i do this in 2 loops :| */
 732             o = area[i][0].x;
 733             for (x = 1; x < screen_num_monitors; ++x)
 734                 o = MIN(o, area[i][x].x);
 735
 736             for (x = 0; x < screen_num_monitors; ++x) {
 737                 int edge = o + s.left - area[i][x].x;
 738                 if (edge > 0) {
 739                     area[i][x].x += edge;
 740                     area[i][x].width -= edge;
 741                 }
 742             }
 743
 744             area[i][screen_num_monitors].x += s.left;
 745             area[i][screen_num_monitors].width -= s.left;
 746         }
 747         if (s.top) {
 748             int o;
 749
 750             /* find the left-most xin heads, i do this in 2 loops :| */
 751             o = area[i][0].y;
 752             for (x = 1; x < screen_num_monitors; ++x)
 753                 o = MIN(o, area[i][x].y);
 754
 755             for (x = 0; x < screen_num_monitors; ++x) {
 756                 int edge = o + s.top - area[i][x].y;
 757                 if (edge > 0) {
 758                     area[i][x].y += edge;
 759                     area[i][x].height -= edge;
 760                 }
 761             }
 762
 763             area[i][screen_num_monitors].y += s.top;
 764             area[i][screen_num_monitors].height -= s.top;
 765         }
 766         if (s.right) {
 767             int o;
 768
 769             /* find the bottom-most xin heads, i do this in 2 loops :| */
 770             o = area[i][0].x + area[i][0].width - 1;
 771             for (x = 1; x < screen_num_monitors; ++x)
 772                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 773
 774             for (x = 0; x < screen_num_monitors; ++x) {
 775                 int edge = (area[i][x].x + area[i][x].width - 1) -
 776                     (o - s.right);
 777                 if (edge > 0)
 778                     area[i][x].width -= edge;
 779             }
 780
 781             area[i][screen_num_monitors].width -= s.right;
 782         }
 783         if (s.bottom) {
 784             int o;
 785
 786             /* find the bottom-most xin heads, i do this in 2 loops :| */
 787             o = area[i][0].y + area[i][0].height - 1;
 788             for (x = 1; x < screen_num_monitors; ++x)
 789                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 790
 791             for (x = 0; x < screen_num_monitors; ++x) {
 792                 int edge = (area[i][x].y + area[i][x].height - 1) -
 793                     (o - s.bottom);
 794                 if (edge > 0)
 795                     area[i][x].height -= edge;
 796             }
 797
 798             area[i][screen_num_monitors].height -= s.bottom;
 799         }
 800
 801         /* XXX when dealing with partial struts, if its in a single
 802            xinerama area, then only subtract it from that area's space
 803         for (x = 0; x < screen_num_monitors; ++x) {
 804             GList *it;
 805
 806
 807                do something smart with it for the 'all xinerama areas' one...
 808
 809             for (it = client_list; it; it = it->next) {
 810
 811                 XXX if gunna test this shit, then gotta worry about when
 812                 the client moves between xinerama heads..
 813
 814                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
 815                                        area[i][x])) {
 816
 817                 }
 818             }
 819         }
 820         */
 821
 822         /* XXX optimize when this is run? */
 823
 824         /* the area has changed, adjust all the maximized
 825            windows */
 826         for (it = client_list; it; it = it->next) {
 827             ObClient *c = it->data;
 828             if (i < screen_num_desktops) {
 829                 if (c->desktop == i)
 830                     client_reconfigure(c);
 831             } else if (c->desktop == DESKTOP_ALL)
 832                 client_reconfigure(c);
 833         }
 834         if (i < screen_num_desktops) {
 835             /* don't set these for the 'all desktops' area */
 836             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
 837             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
 838             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
 839             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
 840         }
 841     }
 842     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
 843                 dims, 4 * screen_num_desktops);
 844
 845     g_free(dims);
 846 }
 847
 848 Rect *screen_area(guint desktop)
 849 {
 850     return screen_area_monitor(desktop, screen_num_monitors);
 851 }
 852
 853 Rect *screen_area_monitor(guint desktop, guint head)
 854 {
 855     if (head > screen_num_monitors)
 856         return NULL;
 857     if (desktop >= screen_num_desktops) {
 858         if (desktop == DESKTOP_ALL)
 859             return &area[screen_num_desktops][head];
 860         return NULL;
 861     }
 862     return &area[desktop][head];
 863 }
 864
 865 Rect *screen_physical_area()
 866 {
 867     return screen_physical_area_monitor(screen_num_monitors);
 868 }
 869
 870 Rect *screen_physical_area_monitor(guint head)
 871 {
 872     if (head > screen_num_monitors)
 873         return NULL;
 874     return &monitor_area[head];
 875 }
 876
 877 static void set_root_cursor()
 878 {
 879 #ifdef USE_LIBSN
 880         if (sn_busy_cnt)
 881             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
 882                           ob_cursor(OB_CURSOR_BUSY));
 883         else
 884 #endif
 885             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
 886                           ob_cursor(OB_CURSOR_POINTER));
 887 }
 888
 889 #ifdef USE_LIBSN
 890 static void sn_timeout(ObTimer *t, void *data)
 891 {
 892     timer_stop(sn_timer);
 893     sn_timer = NULL;
 894     sn_busy_cnt = 0;
 895
 896     set_root_cursor();
 897 }
 898
 899 static void sn_event_func(SnMonitorEvent *ev, void *data)
 900 {
 901     SnStartupSequence *seq;
 902     const char *seq_id, *bin_name;
 903     int cnt = sn_busy_cnt;
 904
 905     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
 906         return;
 907
 908     seq_id = sn_startup_sequence_get_id(seq);
 909     bin_name = sn_startup_sequence_get_binary_name(seq);
 910
 911     if (!(seq_id && bin_name))
 912         return;
 913
 914     switch (sn_monitor_event_get_type(ev)) {
 915     case SN_MONITOR_EVENT_INITIATED:
 916         ++sn_busy_cnt;
 917         if (sn_timer)
 918             timer_stop(sn_timer);
 919         /* 30 second timeout for apps to start */
 920         sn_timer = timer_start(30 * 1000000, sn_timeout, NULL);
 921         break;
 922     case SN_MONITOR_EVENT_CHANGED:
 923         break;
 924     case SN_MONITOR_EVENT_COMPLETED:
 925         if (sn_busy_cnt) --sn_busy_cnt;
 926         if (sn_timer) {
 927             timer_stop(sn_timer);
 928             sn_timer = NULL;
 929         }
 930         break;
 931     case SN_MONITOR_EVENT_CANCELED:
 932         if (sn_busy_cnt) --sn_busy_cnt;
 933         if (sn_timer) {
 934             timer_stop(sn_timer);
 935             sn_timer = NULL;
 936         }
 937     };
 938
 939     if (sn_busy_cnt != cnt)
 940         set_root_cursor();
 941 }
 942 #endif
 943
 944 gboolean screen_pointer_pos(int *x, int *y)
 945 {
 946     Window w;
 947     int i;
 948     guint u;
 949
 950     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
 951                            &w, &w, x, y, &i, &i, &u);
 952 }