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     /* focus the last focused window on the desktop, and ignore enter events
 434        from the switch so it doesnt mess with the focus */
 435     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 436 #ifdef DEBUG_FOCUS
 437     ob_debug("switch fallback\n");
 438 #endif
 439     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 440 #ifdef DEBUG_FOCUS
 441     ob_debug("/switch fallback\n");
 442 #endif
 443 }
 444
 445 static void get_row_col(guint d, guint *r, guint *c)
 446 {
 447     switch (screen_desktop_layout.orientation) {
 448     case OB_ORIENTATION_HORZ:
 449         switch (screen_desktop_layout.start_corner) {
 450         case OB_CORNER_TOPLEFT:
 451             *r = d / screen_desktop_layout.columns;
 452             *c = d % screen_desktop_layout.columns;
 453             break;
 454         case OB_CORNER_BOTTOMLEFT:
 455             *r = screen_desktop_layout.rows - 1 -
 456                 d / screen_desktop_layout.columns;
 457             *c = d % screen_desktop_layout.columns;
 458             break;
 459         case OB_CORNER_TOPRIGHT:
 460             *r = d / screen_desktop_layout.columns;
 461             *c = screen_desktop_layout.columns - 1 -
 462                 d % screen_desktop_layout.columns;
 463             break;
 464         case OB_CORNER_BOTTOMRIGHT:
 465             *r = screen_desktop_layout.rows - 1 -
 466                 d / screen_desktop_layout.columns;
 467             *c = screen_desktop_layout.columns - 1 -
 468                 d % screen_desktop_layout.columns;
 469             break;
 470         }
 471         break;
 472     case OB_ORIENTATION_VERT:
 473         switch (screen_desktop_layout.start_corner) {
 474         case OB_CORNER_TOPLEFT:
 475             *r = d % screen_desktop_layout.rows;
 476             *c = d / screen_desktop_layout.rows;
 477             break;
 478         case OB_CORNER_BOTTOMLEFT:
 479             *r = screen_desktop_layout.rows - 1 -
 480                 d % screen_desktop_layout.rows;
 481             *c = d / screen_desktop_layout.rows;
 482             break;
 483         case OB_CORNER_TOPRIGHT:
 484             *r = d % screen_desktop_layout.rows;
 485             *c = screen_desktop_layout.columns - 1 -
 486                 d / screen_desktop_layout.rows;
 487             break;
 488         case OB_CORNER_BOTTOMRIGHT:
 489             *r = screen_desktop_layout.rows - 1 -
 490                 d % screen_desktop_layout.rows;
 491             *c = screen_desktop_layout.columns - 1 -
 492                 d / screen_desktop_layout.rows;
 493             break;
 494         }
 495         break;
 496     }
 497 }
 498
 499 static guint translate_row_col(guint r, guint c)
 500 {
 501     switch (screen_desktop_layout.orientation) {
 502     case OB_ORIENTATION_HORZ:
 503         switch (screen_desktop_layout.start_corner) {
 504         case OB_CORNER_TOPLEFT:
 505             return r % screen_desktop_layout.rows *
 506                 screen_desktop_layout.columns +
 507                 c % screen_desktop_layout.columns;
 508         case OB_CORNER_BOTTOMLEFT:
 509             return (screen_desktop_layout.rows - 1 -
 510                     r % screen_desktop_layout.rows) *
 511                 screen_desktop_layout.columns +
 512                 c % screen_desktop_layout.columns;
 513         case OB_CORNER_TOPRIGHT:
 514             return r % screen_desktop_layout.rows *
 515                 screen_desktop_layout.columns +
 516                 (screen_desktop_layout.columns - 1 -
 517                  c % screen_desktop_layout.columns);
 518         case OB_CORNER_BOTTOMRIGHT:
 519             return (screen_desktop_layout.rows - 1 -
 520                     r % screen_desktop_layout.rows) *
 521                 screen_desktop_layout.columns +
 522                 (screen_desktop_layout.columns - 1 -
 523                  c % screen_desktop_layout.columns);
 524         }
 525     case OB_ORIENTATION_VERT:
 526         switch (screen_desktop_layout.start_corner) {
 527         case OB_CORNER_TOPLEFT:
 528             return c % screen_desktop_layout.columns *
 529                 screen_desktop_layout.rows +
 530                 r % screen_desktop_layout.rows;
 531         case OB_CORNER_BOTTOMLEFT:
 532             return c % screen_desktop_layout.columns *
 533                 screen_desktop_layout.rows +
 534                 (screen_desktop_layout.rows - 1 -
 535                  r % screen_desktop_layout.rows);
 536         case OB_CORNER_TOPRIGHT:
 537             return (screen_desktop_layout.columns - 1 -
 538                     c % screen_desktop_layout.columns) *
 539                 screen_desktop_layout.rows +
 540                 r % screen_desktop_layout.rows;
 541         case OB_CORNER_BOTTOMRIGHT:
 542             return (screen_desktop_layout.columns - 1 -
 543                     c % screen_desktop_layout.columns) *
 544                 screen_desktop_layout.rows +
 545                 (screen_desktop_layout.rows - 1 -
 546                  r % screen_desktop_layout.rows);
 547         }
 548     }
 549     g_assert_not_reached();
 550     return 0;
 551 }
 552
 553 static void popup_cycle(guint d, gboolean show)
 554 {
 555     Rect *a;
 556
 557     if (!show) {
 558         popup_hide(desktop_cycle_popup);
 559     } else {
 560         a = screen_physical_area_monitor(0);
 561         popup_position(desktop_cycle_popup, CenterGravity,
 562                        a->x + a->width / 2, a->y + a->height / 2);
 563         /* XXX the size and the font extents need to be related on some level
 564          */
 565         popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 566
 567         popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 568
 569         popup_show(desktop_cycle_popup,
 570                    screen_desktop_names[d], NULL);
 571     }
 572 }
 573
 574 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 575                            gboolean dialog, gboolean done, gboolean cancel)
 576 {
 577     static gboolean first = TRUE;
 578     static gboolean lin;
 579     static guint origd, d;
 580     guint r, c;
 581
 582     if (cancel) {
 583         d = origd;
 584         goto done_cycle;
 585     } else if (done && dialog) {
 586         goto done_cycle;
 587     }
 588     if (first) {
 589         first = FALSE;
 590         lin = linear;
 591         d = origd = screen_desktop;
 592     }
 593
 594     get_row_col(d, &r, &c);
 595
 596     if (lin) {
 597         switch (dir) {
 598         case OB_DIRECTION_EAST:
 599             if (d < screen_num_desktops - 1)
 600                 ++d;
 601             else if (wrap)
 602                 d = 0;
 603             break;
 604         case OB_DIRECTION_WEST:
 605             if (d > 0)
 606                 --d;
 607             else if (wrap)
 608                 d = screen_num_desktops - 1;
 609             break;
 610         default:
 611             assert(0);
 612             return screen_desktop;
 613         }
 614     } else {
 615         switch (dir) {
 616         case OB_DIRECTION_EAST:
 617             ++c;
 618             if (c >= screen_desktop_layout.columns) {
 619                 if (!wrap) return d = screen_desktop;
 620                 c = 0;
 621             }
 622             d = translate_row_col(r, c);
 623             if (d >= screen_num_desktops) {
 624                 if (!wrap) return d = screen_desktop;
 625                 ++c;
 626             }
 627             break;
 628         case OB_DIRECTION_WEST:
 629             --c;
 630             if (c >= screen_desktop_layout.columns) {
 631                 if (!wrap) return d = screen_desktop;
 632                 c = screen_desktop_layout.columns - 1;
 633             }
 634             d = translate_row_col(r, c);
 635             if (d >= screen_num_desktops) {
 636                 if (!wrap) return d = screen_desktop;
 637                 --c;
 638             }
 639             break;
 640         case OB_DIRECTION_SOUTH:
 641             ++r;
 642             if (r >= screen_desktop_layout.rows) {
 643                 if (!wrap) return d = screen_desktop;
 644                 r = 0;
 645             }
 646             d = translate_row_col(r, c);
 647             if (d >= screen_num_desktops) {
 648                 if (!wrap) return d = screen_desktop;
 649                 ++r;
 650             }
 651             break;
 652         case OB_DIRECTION_NORTH:
 653             --r;
 654             if (r >= screen_desktop_layout.rows) {
 655                 if (!wrap) return d = screen_desktop;
 656                 r = screen_desktop_layout.rows - 1;
 657             }
 658             d = translate_row_col(r, c);
 659             if (d >= screen_num_desktops) {
 660                 if (!wrap) return d = screen_desktop;
 661                 --r;
 662             }
 663             break;
 664         default:
 665             assert(0);
 666             return d = screen_desktop;
 667         }
 668
 669         d = translate_row_col(r, c);
 670     }
 671
 672     if (dialog) {
 673         popup_cycle(d, TRUE);
 674         return d;
 675     }
 676
 677 done_cycle:
 678     first = TRUE;
 679
 680     popup_cycle(0, FALSE);
 681
 682     return d;
 683 }
 684
 685 void screen_update_layout()
 686 {
 687     ObOrientation orient;
 688     ObCorner corner;
 689     guint rows;
 690     guint cols;
 691     guint32 *data;
 692     guint num;
 693     gboolean valid = FALSE;
 694
 695     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 696                     net_desktop_layout, cardinal, &data, &num)) {
 697         if (num == 3 || num == 4) {
 698
 699             if (data[0] == prop_atoms.net_wm_orientation_vert)
 700                 orient = OB_ORIENTATION_VERT;
 701             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 702                 orient = OB_ORIENTATION_HORZ;
 703             else
 704                 goto screen_update_layout_bail;
 705
 706             if (num < 4)
 707                 corner = OB_CORNER_TOPLEFT;
 708             else {
 709                 if (data[3] == prop_atoms.net_wm_topleft)
 710                     corner = OB_CORNER_TOPLEFT;
 711                 else if (data[3] == prop_atoms.net_wm_topright)
 712                     corner = OB_CORNER_TOPRIGHT;
 713                 else if (data[3] == prop_atoms.net_wm_bottomright)
 714                     corner = OB_CORNER_BOTTOMRIGHT;
 715                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 716                     corner = OB_CORNER_BOTTOMLEFT;
 717                 else
 718                     goto screen_update_layout_bail;
 719             }
 720
 721             /* fill in a zero rows/columns */
 722             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
 723                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
 724                 goto screen_update_layout_bail;
 725             } else {
 726                 if (data[1] == 0) {
 727                     data[1] = (screen_num_desktops +
 728                                screen_num_desktops % data[2]) / data[2];
 729                 } else if (data[2] == 0) {
 730                     data[2] = (screen_num_desktops +
 731                                screen_num_desktops % data[1]) / data[1];
 732                 }
 733                 cols = data[1];
 734                 rows = data[2];
 735             }
 736
 737             /* bounds checking */
 738             if (orient == OB_ORIENTATION_HORZ) {
 739                 rows = MIN(rows, screen_num_desktops);
 740                 cols = MIN(cols, ((screen_num_desktops +
 741                                      (screen_num_desktops % rows)) / rows));
 742             } else {
 743                 cols = MIN(cols, screen_num_desktops);
 744                 rows = MIN(rows, ((screen_num_desktops +
 745                                      (screen_num_desktops % cols)) / cols));
 746             }
 747
 748             valid = TRUE;
 749         }
 750     screen_update_layout_bail:
 751         g_free(data);
 752     }
 753
 754     if (!valid) {
 755         /* defaults */
 756         orient = OB_ORIENTATION_HORZ;
 757         corner = OB_CORNER_TOPLEFT;
 758         rows = 1;
 759         cols = screen_num_desktops;
 760     }
 761
 762     screen_desktop_layout.orientation = orient;
 763     screen_desktop_layout.start_corner = corner;
 764     screen_desktop_layout.rows = rows;
 765     screen_desktop_layout.columns = cols;
 766 }
 767
 768 void screen_update_desktop_names()
 769 {
 770     guint i;
 771
 772     /* empty the array */
 773     g_strfreev(screen_desktop_names);
 774     screen_desktop_names = NULL;
 775
 776     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 777                    net_desktop_names, utf8, &screen_desktop_names))
 778         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 779     else
 780         i = 0;
 781     if (i <= screen_num_desktops) {
 782         screen_desktop_names = g_renew(char*, screen_desktop_names,
 783                                        screen_num_desktops + 1);
 784         screen_desktop_names[screen_num_desktops] = NULL;
 785         for (; i < screen_num_desktops; ++i)
 786             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 787     }
 788 }
 789
 790 void screen_show_desktop(gboolean show)
 791 {
 792     GList *it;
 793
 794     if (show == screen_showing_desktop) return; /* no change */
 795
 796     screen_showing_desktop = show;
 797
 798     if (show) {
 799         /* bottom to top */
 800         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 801             if (WINDOW_IS_CLIENT(it->data)) {
 802                 ObClient *client = it->data;
 803                 if (client->frame->visible && !client_should_show(client))
 804                     frame_hide(client->frame);
 805             }
 806         }
 807     } else {
 808         /* top to bottom */
 809         for (it = stacking_list; it != NULL; it = it->next) {
 810             if (WINDOW_IS_CLIENT(it->data)) {
 811                 ObClient *client = it->data;
 812                 if (!client->frame->visible && client_should_show(client))
 813                     frame_show(client->frame);
 814             }
 815         }
 816     }
 817
 818     if (show) {
 819         /* focus desktop */
 820         for (it = focus_order[screen_desktop]; it; it = it->next)
 821             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 822                 client_focus(it->data))
 823                 break;
 824     } else {
 825         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 826     }
 827
 828     show = !!show; /* make it boolean */
 829     PROP_SET32(RootWindow(ob_display, ob_screen),
 830                net_showing_desktop, cardinal, show);
 831 }
 832
 833 void screen_install_colormap(ObClient *client, gboolean install)
 834 {
 835     XWindowAttributes wa;
 836
 837     if (client == NULL) {
 838         if (install)
 839             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 840         else
 841             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 842     } else {
 843         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 844             wa.colormap != None) {
 845             xerror_set_ignore(TRUE);
 846             if (install)
 847                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 848             else
 849                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 850             xerror_set_ignore(FALSE);
 851         }
 852     }
 853 }
 854
 855 void screen_update_areas()
 856 {
 857     guint i, x;
 858     guint32 *dims;
 859     GList *it;
 860
 861     g_free(monitor_area);
 862     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 863
 864     if (area) {
 865         for (i = 0; area[i]; ++i)
 866             g_free(area[i]);
 867         g_free(area);
 868     }
 869
 870     area = g_new(Rect*, screen_num_desktops + 2);
 871     for (i = 0; i < screen_num_desktops + 1; ++i)
 872         area[i] = g_new(Rect, screen_num_monitors + 1);
 873     area[i] = NULL;
 874
 875     dims = g_new(guint32, 4 * screen_num_desktops);
 876
 877     for (i = 0; i < screen_num_desktops + 1; ++i) {
 878         Strut s;
 879         int l, r, t, b;
 880
 881         /* calc the xinerama areas */
 882         for (x = 0; x < screen_num_monitors; ++x) {
 883             area[i][x] = monitor_area[x];
 884             if (x == 0) {
 885                 l = monitor_area[x].x;
 886                 t = monitor_area[x].y;
 887                 r = monitor_area[x].x + monitor_area[x].width - 1;
 888                 b = monitor_area[x].y + monitor_area[x].height - 1;
 889             } else {
 890                 l = MIN(l, monitor_area[x].x);
 891                 t = MIN(t, monitor_area[x].y);
 892                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 893                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 894             }
 895         }
 896         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 897
 898         /* apply struts */
 899         STRUT_SET(s, 0, 0, 0, 0);
 900         for (it = client_list; it; it = it->next)
 901             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 902         STRUT_ADD(s, dock_strut);
 903
 904         if (s.left) {
 905             int o;
 906
 907             /* find the left-most xin heads, i do this in 2 loops :| */
 908             o = area[i][0].x;
 909             for (x = 1; x < screen_num_monitors; ++x)
 910                 o = MIN(o, area[i][x].x);
 911
 912             for (x = 0; x < screen_num_monitors; ++x) {
 913                 int edge = o + s.left - area[i][x].x;
 914                 if (edge > 0) {
 915                     area[i][x].x += edge;
 916                     area[i][x].width -= edge;
 917                 }
 918             }
 919
 920             area[i][screen_num_monitors].x += s.left;
 921             area[i][screen_num_monitors].width -= s.left;
 922         }
 923         if (s.top) {
 924             int o;
 925
 926             /* find the left-most xin heads, i do this in 2 loops :| */
 927             o = area[i][0].y;
 928             for (x = 1; x < screen_num_monitors; ++x)
 929                 o = MIN(o, area[i][x].y);
 930
 931             for (x = 0; x < screen_num_monitors; ++x) {
 932                 int edge = o + s.top - area[i][x].y;
 933                 if (edge > 0) {
 934                     area[i][x].y += edge;
 935                     area[i][x].height -= edge;
 936                 }
 937             }
 938
 939             area[i][screen_num_monitors].y += s.top;
 940             area[i][screen_num_monitors].height -= s.top;
 941         }
 942         if (s.right) {
 943             int o;
 944
 945             /* find the bottom-most xin heads, i do this in 2 loops :| */
 946             o = area[i][0].x + area[i][0].width - 1;
 947             for (x = 1; x < screen_num_monitors; ++x)
 948                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 949
 950             for (x = 0; x < screen_num_monitors; ++x) {
 951                 int edge = (area[i][x].x + area[i][x].width - 1) -
 952                     (o - s.right);
 953                 if (edge > 0)
 954                     area[i][x].width -= edge;
 955             }
 956
 957             area[i][screen_num_monitors].width -= s.right;
 958         }
 959         if (s.bottom) {
 960             int o;
 961
 962             /* find the bottom-most xin heads, i do this in 2 loops :| */
 963             o = area[i][0].y + area[i][0].height - 1;
 964             for (x = 1; x < screen_num_monitors; ++x)
 965                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 966
 967             for (x = 0; x < screen_num_monitors; ++x) {
 968                 int edge = (area[i][x].y + area[i][x].height - 1) -
 969                     (o - s.bottom);
 970                 if (edge > 0)
 971                     area[i][x].height -= edge;
 972             }
 973
 974             area[i][screen_num_monitors].height -= s.bottom;
 975         }
 976
 977         /* XXX when dealing with partial struts, if its in a single
 978            xinerama area, then only subtract it from that area's space
 979         for (x = 0; x < screen_num_monitors; ++x) {
 980             GList *it;
 981
 982
 983                do something smart with it for the 'all xinerama areas' one...
 984
 985             for (it = client_list; it; it = it->next) {
 986
 987                 XXX if gunna test this shit, then gotta worry about when
 988                 the client moves between xinerama heads..
 989
 990                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
 991                                        area[i][x])) {
 992
 993                 }
 994             }
 995         }
 996         */
 997
 998         /* XXX optimize when this is run? */
 999
1000         /* the area has changed, adjust all the maximized
1001            windows */
1002         for (it = client_list; it; it = it->next) {
1003             ObClient *c = it->data;
1004             if (i < screen_num_desktops) {
1005                 if (c->desktop == i)
1006                     client_reconfigure(c);
1007             } else if (c->desktop == DESKTOP_ALL)
1008                 client_reconfigure(c);
1009         }
1010         if (i < screen_num_desktops) {
1011             /* don't set these for the 'all desktops' area */
1012             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1013             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1014             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1015             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1016         }
1017     }
1018     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1019                 dims, 4 * screen_num_desktops);
1020
1021     g_free(dims);
1022 }
1023
1024 Rect *screen_area(guint desktop)
1025 {
1026     return screen_area_monitor(desktop, screen_num_monitors);
1027 }
1028
1029 Rect *screen_area_monitor(guint desktop, guint head)
1030 {
1031     if (head > screen_num_monitors)
1032         return NULL;
1033     if (desktop >= screen_num_desktops) {
1034         if (desktop == DESKTOP_ALL)
1035             return &area[screen_num_desktops][head];
1036         return NULL;
1037     }
1038     return &area[desktop][head];
1039 }
1040
1041 Rect *screen_physical_area()
1042 {
1043     return screen_physical_area_monitor(screen_num_monitors);
1044 }
1045
1046 Rect *screen_physical_area_monitor(guint head)
1047 {
1048     if (head > screen_num_monitors)
1049         return NULL;
1050     return &monitor_area[head];
1051 }
1052
1053 void screen_set_root_cursor()
1054 {
1055     if (sn_app_starting())
1056         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1057                       ob_cursor(OB_CURSOR_BUSY));
1058     else
1059         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1060                       ob_cursor(OB_CURSOR_POINTER));
1061 }
1062
1063 gboolean screen_pointer_pos(int *x, int *y)
1064 {
1065     Window w;
1066     int i;
1067     guint u;
1068
1069     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1070                            &w, &w, x, y, &i, &i, &u);
1071 }