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