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 "moveresize.h"
   9 #include "config.h"
  10 #include "screen.h"
  11 #include "client.h"
  12 #include "frame.h"
  13 #include "focus.h"
  14 #include "popup.h"
  15 #include "extensions.h"
  16 #include "render/render.h"
  17
  18 #include <X11/Xlib.h>
  19 #ifdef HAVE_UNISTD_H
  20 #  include <sys/types.h>
  21 #  include <unistd.h>
  22 #endif
  23 #include <assert.h>
  24
  25 /*! The event mask to grab on the root window */
  26 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  27                         EnterWindowMask | LeaveWindowMask | \
  28                         SubstructureNotifyMask | SubstructureRedirectMask | \
  29                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  30
  31 guint    screen_num_desktops;
  32 guint    screen_num_monitors;
  33 guint    screen_desktop;
  34 guint    screen_last_desktop;
  35 Size     screen_physical_size;
  36 gboolean screen_showing_desktop;
  37 DesktopLayout screen_desktop_layout;
  38 char   **screen_desktop_names;
  39 Window   screen_support_win;
  40
  41 static Rect  **area; /* array of desktop holding array of xinerama areas */
  42 static Rect  *monitor_area;
  43
  44 static ObPagerPopup *desktop_cycle_popup;
  45
  46 static gboolean replace_wm()
  47 {
  48     char *wm_sn;
  49     Atom wm_sn_atom;
  50     Window current_wm_sn_owner;
  51     Time timestamp;
  52
  53     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  54     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  55     g_free(wm_sn);
  56
  57     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  58     if (current_wm_sn_owner) {
  59         if (!ob_replace_wm) {
  60             g_warning("A window manager is already running on screen %d",
  61                       ob_screen);
  62             return FALSE;
  63         }
  64         xerror_set_ignore(TRUE);
  65         xerror_occured = FALSE;
  66
  67         /* We want to find out when the current selection owner dies */
  68         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  69         XSync(ob_display, FALSE);
  70
  71         xerror_set_ignore(FALSE);
  72         if (xerror_occured)
  73             current_wm_sn_owner = None;
  74     }
  75
  76     {
  77         /* Generate a timestamp */
  78         XEvent event;
  79
  80         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
  81
  82         XChangeProperty(ob_display, screen_support_win,
  83                         prop_atoms.wm_class, prop_atoms.string,
  84                         8, PropModeAppend, NULL, 0);
  85         XWindowEvent(ob_display, screen_support_win,
  86                      PropertyChangeMask, &event);
  87
  88         XSelectInput(ob_display, screen_support_win, NoEventMask);
  89
  90         timestamp = event.xproperty.time;
  91     }
  92
  93     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
  94                        timestamp);
  95
  96     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
  97         g_warning("Could not acquire window manager selection on screen %d",
  98                   ob_screen);
  99         return FALSE;
 100     }
 101
 102     /* Wait for old window manager to go away */
 103     if (current_wm_sn_owner) {
 104       XEvent event;
 105       gulong wait = 0;
 106       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 107
 108       while (wait < timeout) {
 109           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 110                                 StructureNotifyMask, &event) &&
 111               event.type == DestroyNotify)
 112               break;
 113           g_usleep(G_USEC_PER_SEC / 10);
 114           wait += G_USEC_PER_SEC / 10;
 115       }
 116
 117       if (wait >= timeout) {
 118           g_warning("Timeout expired while waiting for the current WM to die "
 119                     "on screen %d", ob_screen);
 120           return FALSE;
 121       }
 122     }
 123
 124     /* Send client message indicating that we are now the WM */
 125     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 126                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 127
 128
 129     return TRUE;
 130 }
 131
 132 gboolean screen_annex()
 133 {
 134     XSetWindowAttributes attrib;
 135     pid_t pid;
 136     gint i, num_support;
 137     guint32 *supported;
 138
 139     /* create the netwm support window */
 140     attrib.override_redirect = TRUE;
 141     screen_support_win = XCreateWindow(ob_display,
 142                                        RootWindow(ob_display, ob_screen),
 143                                        -100, -100, 1, 1, 0,
 144                                        CopyFromParent, InputOutput,
 145                                        CopyFromParent,
 146                                        CWOverrideRedirect, &attrib);
 147     XMapRaised(ob_display, screen_support_win);
 148
 149     if (!replace_wm()) {
 150         XDestroyWindow(ob_display, screen_support_win);
 151         return FALSE;
 152     }
 153
 154     xerror_set_ignore(TRUE);
 155     xerror_occured = FALSE;
 156     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 157                  ROOT_EVENTMASK);
 158     xerror_set_ignore(FALSE);
 159     if (xerror_occured) {
 160         g_warning("A window manager is already running on screen %d",
 161                   ob_screen);
 162
 163         XDestroyWindow(ob_display, screen_support_win);
 164         return FALSE;
 165     }
 166
 167
 168     screen_set_root_cursor();
 169
 170     /* set the OPENBOX_PID hint */
 171     pid = getpid();
 172     PROP_SET32(RootWindow(ob_display, ob_screen),
 173                openbox_pid, cardinal, pid);
 174
 175     /* set supporting window */
 176     PROP_SET32(RootWindow(ob_display, ob_screen),
 177                net_supporting_wm_check, window, screen_support_win);
 178
 179     /* set properties on the supporting window */
 180     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 181     PROP_SET32(screen_support_win, net_supporting_wm_check,
 182                window, screen_support_win);
 183
 184     /* set the _NET_SUPPORTED_ATOMS hint */
 185     num_support = 50;
 186     i = 0;
 187     supported = g_new(guint32, num_support);
 188     supported[i++] = prop_atoms.net_current_desktop;
 189     supported[i++] = prop_atoms.net_number_of_desktops;
 190     supported[i++] = prop_atoms.net_desktop_geometry;
 191     supported[i++] = prop_atoms.net_desktop_viewport;
 192     supported[i++] = prop_atoms.net_active_window;
 193     supported[i++] = prop_atoms.net_workarea;
 194     supported[i++] = prop_atoms.net_client_list;
 195     supported[i++] = prop_atoms.net_client_list_stacking;
 196     supported[i++] = prop_atoms.net_desktop_names;
 197     supported[i++] = prop_atoms.net_close_window;
 198     supported[i++] = prop_atoms.net_desktop_layout;
 199     supported[i++] = prop_atoms.net_showing_desktop;
 200     supported[i++] = prop_atoms.net_wm_name;
 201     supported[i++] = prop_atoms.net_wm_visible_name;
 202     supported[i++] = prop_atoms.net_wm_icon_name;
 203     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 204     supported[i++] = prop_atoms.net_wm_desktop;
 205     supported[i++] = prop_atoms.net_wm_strut;
 206     supported[i++] = prop_atoms.net_wm_window_type;
 207     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 208     supported[i++] = prop_atoms.net_wm_window_type_dock;
 209     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 210     supported[i++] = prop_atoms.net_wm_window_type_menu;
 211     supported[i++] = prop_atoms.net_wm_window_type_utility;
 212     supported[i++] = prop_atoms.net_wm_window_type_splash;
 213     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 214     supported[i++] = prop_atoms.net_wm_window_type_normal;
 215     supported[i++] = prop_atoms.net_wm_allowed_actions;
 216     supported[i++] = prop_atoms.net_wm_action_move;
 217     supported[i++] = prop_atoms.net_wm_action_resize;
 218     supported[i++] = prop_atoms.net_wm_action_minimize;
 219     supported[i++] = prop_atoms.net_wm_action_shade;
 220     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 221     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 222     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 223     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 224     supported[i++] = prop_atoms.net_wm_action_close;
 225     supported[i++] = prop_atoms.net_wm_state;
 226     supported[i++] = prop_atoms.net_wm_state_modal;
 227     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 228     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 229     supported[i++] = prop_atoms.net_wm_state_shaded;
 230     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 231     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 232     supported[i++] = prop_atoms.net_wm_state_hidden;
 233     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 234     supported[i++] = prop_atoms.net_wm_state_above;
 235     supported[i++] = prop_atoms.net_wm_state_below;
 236     supported[i++] = prop_atoms.net_moveresize_window;
 237     supported[i++] = prop_atoms.net_wm_moveresize;
 238     g_assert(i == num_support);
 239 /*
 240   supported[] = prop_atoms.net_wm_action_stick;
 241 */
 242
 243     PROP_SETA32(RootWindow(ob_display, ob_screen),
 244                 net_supported, atom, supported, num_support);
 245     g_free(supported);
 246
 247     return TRUE;
 248 }
 249
 250 void screen_startup(gboolean reconfig)
 251 {
 252     GSList *it;
 253     guint i;
 254
 255     desktop_cycle_popup = pager_popup_new(FALSE);
 256
 257     if (!reconfig)
 258         /* get the initial size */
 259         screen_resize();
 260
 261     /* set the names */
 262     screen_desktop_names = g_new(char*,
 263                                  g_slist_length(config_desktops_names) + 1);
 264     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 265         screen_desktop_names[i] = it->data; /* dont strdup */
 266     screen_desktop_names[i] = NULL;
 267     PROP_SETSS(RootWindow(ob_display, ob_screen),
 268                net_desktop_names, screen_desktop_names);
 269     g_free(screen_desktop_names); /* dont free the individual strings */
 270     screen_desktop_names = NULL;
 271
 272     if (!reconfig)
 273         screen_num_desktops = 0;
 274     screen_set_num_desktops(config_desktops_num);
 275     if (!reconfig) {
 276         screen_set_desktop(0);
 277
 278         /* don't start in showing-desktop mode */
 279         screen_showing_desktop = FALSE;
 280         PROP_SET32(RootWindow(ob_display, ob_screen),
 281                    net_showing_desktop, cardinal, screen_showing_desktop);
 282
 283         screen_update_layout();
 284     }
 285 }
 286
 287 void screen_shutdown(gboolean reconfig)
 288 {
 289     Rect **r;
 290
 291     pager_popup_free(desktop_cycle_popup);
 292
 293     if (!reconfig) {
 294         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 295                      NoEventMask);
 296
 297         /* we're not running here no more! */
 298         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 299         /* not without us */
 300         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 301         /* don't keep this mode */
 302         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 303
 304         XDestroyWindow(ob_display, screen_support_win);
 305     }
 306
 307     g_strfreev(screen_desktop_names);
 308     screen_desktop_names = NULL;
 309     for (r = area; *r; ++r)
 310         g_free(*r);
 311     g_free(area);
 312     area = NULL;
 313 }
 314
 315 void screen_resize()
 316 {
 317     static int oldw = 0, oldh = 0;
 318     int w, h;
 319     GList *it;
 320     guint32 geometry[2];
 321
 322     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 323     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 324
 325     if (w == oldw && h == oldh) return;
 326
 327     oldw = w; oldh = h;
 328
 329     /* Set the _NET_DESKTOP_GEOMETRY hint */
 330     screen_physical_size.width = geometry[0] = w;
 331     screen_physical_size.height = geometry[1] = h;
 332     PROP_SETA32(RootWindow(ob_display, ob_screen),
 333                 net_desktop_geometry, cardinal, geometry, 2);
 334
 335     if (ob_state() == OB_STATE_STARTING)
 336         return;
 337
 338     screen_update_areas();
 339     dock_configure();
 340
 341     for (it = client_list; it; it = it->next)
 342         client_move_onscreen(it->data, FALSE);
 343 }
 344
 345 void screen_set_num_desktops(guint num)
 346 {
 347     guint i, old;
 348     guint32 *viewport;
 349     GList *it;
 350
 351     g_assert(num > 0);
 352
 353     if (screen_num_desktops == num) return;
 354
 355     old = screen_num_desktops;
 356     screen_num_desktops = num;
 357     PROP_SET32(RootWindow(ob_display, ob_screen),
 358                net_number_of_desktops, cardinal, num);
 359
 360     /* set the viewport hint */
 361     viewport = g_new0(guint32, num * 2);
 362     PROP_SETA32(RootWindow(ob_display, ob_screen),
 363                 net_desktop_viewport, cardinal, viewport, num * 2);
 364     g_free(viewport);
 365
 366     /* the number of rows/columns will differ */
 367     screen_update_layout();
 368
 369     /* may be some unnamed desktops that we need to fill in with names */
 370     screen_update_desktop_names();
 371
 372     /* move windows on desktops that will no longer exist! */
 373     for (it = client_list; it != NULL; it = it->next) {
 374         ObClient *c = it->data;
 375         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 376             client_set_desktop(c, num - 1, FALSE);
 377     }
 378
 379     /* change our struts/area to match (after moving windows) */
 380     screen_update_areas();
 381
 382     /* change our desktop if we're on one that no longer exists! */
 383     if (screen_desktop >= screen_num_desktops)
 384         screen_set_desktop(num - 1);
 385
 386    /* update the focus lists */
 387     /* free our lists for the desktops which have disappeared */
 388     for (i = num; i < old; ++i)
 389         g_list_free(focus_order[i]);
 390     /* realloc the array */
 391     focus_order = g_renew(GList*, focus_order, num);
 392     /* set the new lists to be empty */
 393     for (i = old; i < num; ++i)
 394         focus_order[i] = NULL;
 395 }
 396
 397 void screen_set_desktop(guint num)
 398 {
 399     GList *it;
 400     guint old;
 401     XEvent e;
 402
 403     g_assert(num < screen_num_desktops);
 404
 405     old = screen_desktop;
 406     screen_desktop = num;
 407     PROP_SET32(RootWindow(ob_display, ob_screen),
 408                net_current_desktop, cardinal, num);
 409
 410     if (old == num) return;
 411
 412     screen_last_desktop = old;
 413
 414     ob_debug("Moving to desktop %d\n", num+1);
 415
 416     if (moveresize_client)
 417         client_set_desktop(moveresize_client, num, TRUE);
 418
 419     /* show windows before hiding the rest to lessen the enter/leave events */
 420
 421     /* show windows from top to bottom */
 422     for (it = stacking_list; it != NULL; it = it->next) {
 423         if (WINDOW_IS_CLIENT(it->data)) {
 424             ObClient *c = it->data;
 425             if (!c->frame->visible && client_should_show(c))
 426                 frame_show(c->frame);
 427         }
 428     }
 429
 430     /* hide windows from bottom to top */
 431     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 432         if (WINDOW_IS_CLIENT(it->data)) {
 433             ObClient *c = it->data;
 434             if (c->frame->visible && !client_should_show(c))
 435                 frame_hide(c->frame);
 436         }
 437     }
 438
 439     XSync(ob_display, FALSE);
 440     /* focus the last focused window on the desktop, and ignore enter events
 441        from the switch so it doesnt mess with the focus */
 442     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 443 #ifdef DEBUG_FOCUS
 444     ob_debug("switch fallback\n");
 445 #endif
 446     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 447 #ifdef DEBUG_FOCUS
 448     ob_debug("/switch fallback\n");
 449 #endif
 450 }
 451
 452 static void get_row_col(guint d, guint *r, guint *c)
 453 {
 454     switch (screen_desktop_layout.orientation) {
 455     case OB_ORIENTATION_HORZ:
 456         switch (screen_desktop_layout.start_corner) {
 457         case OB_CORNER_TOPLEFT:
 458             *r = d / screen_desktop_layout.columns;
 459             *c = d % screen_desktop_layout.columns;
 460             break;
 461         case OB_CORNER_BOTTOMLEFT:
 462             *r = screen_desktop_layout.rows - 1 -
 463                 d / screen_desktop_layout.columns;
 464             *c = d % screen_desktop_layout.columns;
 465             break;
 466         case OB_CORNER_TOPRIGHT:
 467             *r = d / screen_desktop_layout.columns;
 468             *c = screen_desktop_layout.columns - 1 -
 469                 d % screen_desktop_layout.columns;
 470             break;
 471         case OB_CORNER_BOTTOMRIGHT:
 472             *r = screen_desktop_layout.rows - 1 -
 473                 d / screen_desktop_layout.columns;
 474             *c = screen_desktop_layout.columns - 1 -
 475                 d % screen_desktop_layout.columns;
 476             break;
 477         }
 478         break;
 479     case OB_ORIENTATION_VERT:
 480         switch (screen_desktop_layout.start_corner) {
 481         case OB_CORNER_TOPLEFT:
 482             *r = d % screen_desktop_layout.rows;
 483             *c = d / screen_desktop_layout.rows;
 484             break;
 485         case OB_CORNER_BOTTOMLEFT:
 486             *r = screen_desktop_layout.rows - 1 -
 487                 d % screen_desktop_layout.rows;
 488             *c = d / screen_desktop_layout.rows;
 489             break;
 490         case OB_CORNER_TOPRIGHT:
 491             *r = d % screen_desktop_layout.rows;
 492             *c = screen_desktop_layout.columns - 1 -
 493                 d / screen_desktop_layout.rows;
 494             break;
 495         case OB_CORNER_BOTTOMRIGHT:
 496             *r = screen_desktop_layout.rows - 1 -
 497                 d % screen_desktop_layout.rows;
 498             *c = screen_desktop_layout.columns - 1 -
 499                 d / screen_desktop_layout.rows;
 500             break;
 501         }
 502         break;
 503     }
 504 }
 505
 506 static guint translate_row_col(guint r, guint c)
 507 {
 508     switch (screen_desktop_layout.orientation) {
 509     case OB_ORIENTATION_HORZ:
 510         switch (screen_desktop_layout.start_corner) {
 511         case OB_CORNER_TOPLEFT:
 512             return r % screen_desktop_layout.rows *
 513                 screen_desktop_layout.columns +
 514                 c % screen_desktop_layout.columns;
 515         case OB_CORNER_BOTTOMLEFT:
 516             return (screen_desktop_layout.rows - 1 -
 517                     r % screen_desktop_layout.rows) *
 518                 screen_desktop_layout.columns +
 519                 c % screen_desktop_layout.columns;
 520         case OB_CORNER_TOPRIGHT:
 521             return r % screen_desktop_layout.rows *
 522                 screen_desktop_layout.columns +
 523                 (screen_desktop_layout.columns - 1 -
 524                  c % screen_desktop_layout.columns);
 525         case OB_CORNER_BOTTOMRIGHT:
 526             return (screen_desktop_layout.rows - 1 -
 527                     r % screen_desktop_layout.rows) *
 528                 screen_desktop_layout.columns +
 529                 (screen_desktop_layout.columns - 1 -
 530                  c % screen_desktop_layout.columns);
 531         }
 532     case OB_ORIENTATION_VERT:
 533         switch (screen_desktop_layout.start_corner) {
 534         case OB_CORNER_TOPLEFT:
 535             return c % screen_desktop_layout.columns *
 536                 screen_desktop_layout.rows +
 537                 r % screen_desktop_layout.rows;
 538         case OB_CORNER_BOTTOMLEFT:
 539             return c % screen_desktop_layout.columns *
 540                 screen_desktop_layout.rows +
 541                 (screen_desktop_layout.rows - 1 -
 542                  r % screen_desktop_layout.rows);
 543         case OB_CORNER_TOPRIGHT:
 544             return (screen_desktop_layout.columns - 1 -
 545                     c % screen_desktop_layout.columns) *
 546                 screen_desktop_layout.rows +
 547                 r % screen_desktop_layout.rows;
 548         case OB_CORNER_BOTTOMRIGHT:
 549             return (screen_desktop_layout.columns - 1 -
 550                     c % screen_desktop_layout.columns) *
 551                 screen_desktop_layout.rows +
 552                 (screen_desktop_layout.rows - 1 -
 553                  r % screen_desktop_layout.rows);
 554         }
 555     }
 556     g_assert_not_reached();
 557     return 0;
 558 }
 559
 560 static void popup_cycle(guint d, gboolean show)
 561 {
 562     Rect *a;
 563
 564     if (!show) {
 565         pager_popup_hide(desktop_cycle_popup);
 566     } else {
 567         a = screen_physical_area_monitor(0);
 568         pager_popup_position(desktop_cycle_popup, CenterGravity,
 569                              a->x + a->width / 2, a->y + a->height / 2);
 570         /* XXX the size and the font extents need to be related on some level
 571          */
 572         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 573
 574         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 575
 576         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 577     }
 578 }
 579
 580 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 581                            gboolean dialog, gboolean done, gboolean cancel)
 582 {
 583     static gboolean first = TRUE;
 584     static gboolean lin;
 585     static guint origd, d;
 586     guint r, c;
 587
 588     if (cancel) {
 589         d = origd;
 590         goto done_cycle;
 591     } else if (done && dialog) {
 592         goto done_cycle;
 593     }
 594     if (first) {
 595         first = FALSE;
 596         lin = linear;
 597         d = origd = screen_desktop;
 598     }
 599
 600     get_row_col(d, &r, &c);
 601
 602     if (lin) {
 603         switch (dir) {
 604         case OB_DIRECTION_EAST:
 605             if (d < screen_num_desktops - 1)
 606                 ++d;
 607             else if (wrap)
 608                 d = 0;
 609             break;
 610         case OB_DIRECTION_WEST:
 611             if (d > 0)
 612                 --d;
 613             else if (wrap)
 614                 d = screen_num_desktops - 1;
 615             break;
 616         default:
 617             assert(0);
 618             return screen_desktop;
 619         }
 620     } else {
 621         switch (dir) {
 622         case OB_DIRECTION_EAST:
 623             ++c;
 624             if (c >= screen_desktop_layout.columns) {
 625                 if (!wrap) return d = screen_desktop;
 626                 c = 0;
 627             }
 628             d = translate_row_col(r, c);
 629             if (d >= screen_num_desktops) {
 630                 if (!wrap) return d = screen_desktop;
 631                 ++c;
 632             }
 633             break;
 634         case OB_DIRECTION_WEST:
 635             --c;
 636             if (c >= screen_desktop_layout.columns) {
 637                 if (!wrap) return d = screen_desktop;
 638                 c = screen_desktop_layout.columns - 1;
 639             }
 640             d = translate_row_col(r, c);
 641             if (d >= screen_num_desktops) {
 642                 if (!wrap) return d = screen_desktop;
 643                 --c;
 644             }
 645             break;
 646         case OB_DIRECTION_SOUTH:
 647             ++r;
 648             if (r >= screen_desktop_layout.rows) {
 649                 if (!wrap) return d = screen_desktop;
 650                 r = 0;
 651             }
 652             d = translate_row_col(r, c);
 653             if (d >= screen_num_desktops) {
 654                 if (!wrap) return d = screen_desktop;
 655                 ++r;
 656             }
 657             break;
 658         case OB_DIRECTION_NORTH:
 659             --r;
 660             if (r >= screen_desktop_layout.rows) {
 661                 if (!wrap) return d = screen_desktop;
 662                 r = screen_desktop_layout.rows - 1;
 663             }
 664             d = translate_row_col(r, c);
 665             if (d >= screen_num_desktops) {
 666                 if (!wrap) return d = screen_desktop;
 667                 --r;
 668             }
 669             break;
 670         default:
 671             assert(0);
 672             return d = screen_desktop;
 673         }
 674
 675         d = translate_row_col(r, c);
 676     }
 677
 678     if (dialog) {
 679         popup_cycle(d, TRUE);
 680         return d;
 681     }
 682
 683 done_cycle:
 684     first = TRUE;
 685
 686     popup_cycle(0, FALSE);
 687
 688     return d;
 689 }
 690
 691 void screen_update_layout()
 692 {
 693     ObOrientation orient;
 694     ObCorner corner;
 695     guint rows;
 696     guint cols;
 697     guint32 *data;
 698     guint num;
 699     gboolean valid = FALSE;
 700
 701     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 702                     net_desktop_layout, cardinal, &data, &num)) {
 703         if (num == 3 || num == 4) {
 704
 705             if (data[0] == prop_atoms.net_wm_orientation_vert)
 706                 orient = OB_ORIENTATION_VERT;
 707             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 708                 orient = OB_ORIENTATION_HORZ;
 709             else
 710                 goto screen_update_layout_bail;
 711
 712             if (num < 4)
 713                 corner = OB_CORNER_TOPLEFT;
 714             else {
 715                 if (data[3] == prop_atoms.net_wm_topleft)
 716                     corner = OB_CORNER_TOPLEFT;
 717                 else if (data[3] == prop_atoms.net_wm_topright)
 718                     corner = OB_CORNER_TOPRIGHT;
 719                 else if (data[3] == prop_atoms.net_wm_bottomright)
 720                     corner = OB_CORNER_BOTTOMRIGHT;
 721                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 722                     corner = OB_CORNER_BOTTOMLEFT;
 723                 else
 724                     goto screen_update_layout_bail;
 725             }
 726
 727             cols = data[1];
 728             rows = data[2];
 729
 730             /* fill in a zero rows/columns */
 731             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 732                 goto screen_update_layout_bail;
 733             } else {
 734                 if (cols == 0) {
 735                     cols = screen_num_desktops / rows;
 736                     if (rows * cols < screen_num_desktops)
 737                         cols++;
 738                     if (rows * cols >= screen_num_desktops + cols)
 739                         rows--;
 740                 } else if (rows == 0) {
 741                     rows = screen_num_desktops / rows;
 742                     if (cols * rows < screen_num_desktops)
 743                         rows++;
 744                     if (cols * rows >= screen_num_desktops + rows)
 745                         cols--;
 746                 }
 747             }
 748
 749             /* bounds checking */
 750             if (orient == OB_ORIENTATION_HORZ) {
 751                 cols = MIN(screen_num_desktops, cols);
 752                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 753                 cols = screen_num_desktops / rows +
 754                     !!(screen_num_desktops % rows);
 755             } else {
 756                 rows = MIN(screen_num_desktops, rows);
 757                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 758                 rows = screen_num_desktops / cols +
 759                     !!(screen_num_desktops % cols);
 760             }
 761
 762             valid = TRUE;
 763         }
 764     screen_update_layout_bail:
 765         g_free(data);
 766     }
 767
 768     if (!valid) {
 769         /* defaults */
 770         orient = OB_ORIENTATION_HORZ;
 771         corner = OB_CORNER_TOPLEFT;
 772         rows = 1;
 773         cols = screen_num_desktops;
 774     }
 775
 776     screen_desktop_layout.orientation = orient;
 777     screen_desktop_layout.start_corner = corner;
 778     screen_desktop_layout.rows = rows;
 779     screen_desktop_layout.columns = cols;
 780 }
 781
 782 void screen_update_desktop_names()
 783 {
 784     guint i;
 785
 786     /* empty the array */
 787     g_strfreev(screen_desktop_names);
 788     screen_desktop_names = NULL;
 789
 790     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 791                    net_desktop_names, utf8, &screen_desktop_names))
 792         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 793     else
 794         i = 0;
 795     if (i <= screen_num_desktops) {
 796         screen_desktop_names = g_renew(char*, screen_desktop_names,
 797                                        screen_num_desktops + 1);
 798         screen_desktop_names[screen_num_desktops] = NULL;
 799         for (; i < screen_num_desktops; ++i)
 800             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 801     }
 802 }
 803
 804 void screen_show_desktop(gboolean show)
 805 {
 806     GList *it;
 807
 808     if (show == screen_showing_desktop) return; /* no change */
 809
 810     screen_showing_desktop = show;
 811
 812     if (show) {
 813         /* bottom to top */
 814         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 815             if (WINDOW_IS_CLIENT(it->data)) {
 816                 ObClient *client = it->data;
 817                 if (client->frame->visible && !client_should_show(client))
 818                     frame_hide(client->frame);
 819             }
 820         }
 821     } else {
 822         /* top to bottom */
 823         for (it = stacking_list; it != NULL; it = it->next) {
 824             if (WINDOW_IS_CLIENT(it->data)) {
 825                 ObClient *client = it->data;
 826                 if (!client->frame->visible && client_should_show(client))
 827                     frame_show(client->frame);
 828             }
 829         }
 830     }
 831
 832     if (show) {
 833         /* focus desktop */
 834         for (it = focus_order[screen_desktop]; it; it = it->next)
 835             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 836                 client_focus(it->data))
 837                 break;
 838     } else {
 839         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 840     }
 841
 842     show = !!show; /* make it boolean */
 843     PROP_SET32(RootWindow(ob_display, ob_screen),
 844                net_showing_desktop, cardinal, show);
 845 }
 846
 847 void screen_install_colormap(ObClient *client, gboolean install)
 848 {
 849     XWindowAttributes wa;
 850
 851     if (client == NULL) {
 852         if (install)
 853             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 854         else
 855             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 856     } else {
 857         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 858             wa.colormap != None) {
 859             xerror_set_ignore(TRUE);
 860             if (install)
 861                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 862             else
 863                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 864             xerror_set_ignore(FALSE);
 865         }
 866     }
 867 }
 868
 869 void screen_update_areas()
 870 {
 871     guint i, x;
 872     guint32 *dims;
 873     GList *it;
 874
 875     g_free(monitor_area);
 876     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 877
 878     if (area) {
 879         for (i = 0; area[i]; ++i)
 880             g_free(area[i]);
 881         g_free(area);
 882     }
 883
 884     area = g_new(Rect*, screen_num_desktops + 2);
 885     for (i = 0; i < screen_num_desktops + 1; ++i)
 886         area[i] = g_new(Rect, screen_num_monitors + 1);
 887     area[i] = NULL;
 888
 889     dims = g_new(guint32, 4 * screen_num_desktops);
 890
 891     for (i = 0; i < screen_num_desktops + 1; ++i) {
 892         Strut s;
 893         int l, r, t, b;
 894
 895         /* calc the xinerama areas */
 896         for (x = 0; x < screen_num_monitors; ++x) {
 897             area[i][x] = monitor_area[x];
 898             if (x == 0) {
 899                 l = monitor_area[x].x;
 900                 t = monitor_area[x].y;
 901                 r = monitor_area[x].x + monitor_area[x].width - 1;
 902                 b = monitor_area[x].y + monitor_area[x].height - 1;
 903             } else {
 904                 l = MIN(l, monitor_area[x].x);
 905                 t = MIN(t, monitor_area[x].y);
 906                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 907                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 908             }
 909         }
 910         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 911
 912         /* apply struts */
 913         STRUT_SET(s, 0, 0, 0, 0);
 914         for (it = client_list; it; it = it->next)
 915             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 916         STRUT_ADD(s, dock_strut);
 917
 918         if (s.left) {
 919             int o;
 920
 921             /* find the left-most xin heads, i do this in 2 loops :| */
 922             o = area[i][0].x;
 923             for (x = 1; x < screen_num_monitors; ++x)
 924                 o = MIN(o, area[i][x].x);
 925
 926             for (x = 0; x < screen_num_monitors; ++x) {
 927                 int edge = o + s.left - area[i][x].x;
 928                 if (edge > 0) {
 929                     area[i][x].x += edge;
 930                     area[i][x].width -= edge;
 931                 }
 932             }
 933
 934             area[i][screen_num_monitors].x += s.left;
 935             area[i][screen_num_monitors].width -= s.left;
 936         }
 937         if (s.top) {
 938             int o;
 939
 940             /* find the left-most xin heads, i do this in 2 loops :| */
 941             o = area[i][0].y;
 942             for (x = 1; x < screen_num_monitors; ++x)
 943                 o = MIN(o, area[i][x].y);
 944
 945             for (x = 0; x < screen_num_monitors; ++x) {
 946                 int edge = o + s.top - area[i][x].y;
 947                 if (edge > 0) {
 948                     area[i][x].y += edge;
 949                     area[i][x].height -= edge;
 950                 }
 951             }
 952
 953             area[i][screen_num_monitors].y += s.top;
 954             area[i][screen_num_monitors].height -= s.top;
 955         }
 956         if (s.right) {
 957             int o;
 958
 959             /* find the bottom-most xin heads, i do this in 2 loops :| */
 960             o = area[i][0].x + area[i][0].width - 1;
 961             for (x = 1; x < screen_num_monitors; ++x)
 962                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 963
 964             for (x = 0; x < screen_num_monitors; ++x) {
 965                 int edge = (area[i][x].x + area[i][x].width - 1) -
 966                     (o - s.right);
 967                 if (edge > 0)
 968                     area[i][x].width -= edge;
 969             }
 970
 971             area[i][screen_num_monitors].width -= s.right;
 972         }
 973         if (s.bottom) {
 974             int o;
 975
 976             /* find the bottom-most xin heads, i do this in 2 loops :| */
 977             o = area[i][0].y + area[i][0].height - 1;
 978             for (x = 1; x < screen_num_monitors; ++x)
 979                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 980
 981             for (x = 0; x < screen_num_monitors; ++x) {
 982                 int edge = (area[i][x].y + area[i][x].height - 1) -
 983                     (o - s.bottom);
 984                 if (edge > 0)
 985                     area[i][x].height -= edge;
 986             }
 987
 988             area[i][screen_num_monitors].height -= s.bottom;
 989         }
 990
 991         /* XXX when dealing with partial struts, if its in a single
 992            xinerama area, then only subtract it from that area's space
 993         for (x = 0; x < screen_num_monitors; ++x) {
 994             GList *it;
 995
 996
 997                do something smart with it for the 'all xinerama areas' one...
 998
 999             for (it = client_list; it; it = it->next) {
1000
1001                 XXX if gunna test this shit, then gotta worry about when
1002                 the client moves between xinerama heads..
1003
1004                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
1005                                        area[i][x])) {
1006
1007                 }
1008             }
1009         }
1010         */
1011
1012         /* XXX optimize when this is run? */
1013
1014         /* the area has changed, adjust all the maximized
1015            windows */
1016         for (it = client_list; it; it = it->next) {
1017             ObClient *c = it->data;
1018             if (i < screen_num_desktops) {
1019                 if (c->desktop == i)
1020                     client_reconfigure(c);
1021             } else if (c->desktop == DESKTOP_ALL)
1022                 client_reconfigure(c);
1023         }
1024         if (i < screen_num_desktops) {
1025             /* don't set these for the 'all desktops' area */
1026             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1027             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1028             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1029             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1030         }
1031     }
1032     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1033                 dims, 4 * screen_num_desktops);
1034
1035     g_free(dims);
1036 }
1037
1038 Rect *screen_area(guint desktop)
1039 {
1040     return screen_area_monitor(desktop, screen_num_monitors);
1041 }
1042
1043 Rect *screen_area_monitor(guint desktop, guint head)
1044 {
1045     if (head > screen_num_monitors)
1046         return NULL;
1047     if (desktop >= screen_num_desktops) {
1048         if (desktop == DESKTOP_ALL)
1049             return &area[screen_num_desktops][head];
1050         return NULL;
1051     }
1052     return &area[desktop][head];
1053 }
1054
1055 Rect *screen_physical_area()
1056 {
1057     return screen_physical_area_monitor(screen_num_monitors);
1058 }
1059
1060 Rect *screen_physical_area_monitor(guint head)
1061 {
1062     if (head > screen_num_monitors)
1063         return NULL;
1064     return &monitor_area[head];
1065 }
1066
1067 void screen_set_root_cursor()
1068 {
1069     if (sn_app_starting())
1070         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1071                       ob_cursor(OB_CURSOR_BUSY));
1072     else
1073         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1074                       ob_cursor(OB_CURSOR_POINTER));
1075 }
1076
1077 gboolean screen_pointer_pos(int *x, int *y)
1078 {
1079     Window w;
1080     int i;
1081     guint u;
1082
1083     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1084                            &w, &w, x, y, &i, &i, &u);
1085 }