Dogcows Code - chaz/openbox/blob - 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     old = screen_num_desktops;
 354     screen_num_desktops = num;
 355     PROP_SET32(RootWindow(ob_display, ob_screen),
 356                net_number_of_desktops, cardinal, num);
 357
 358     /* set the viewport hint */
 359     viewport = g_new0(guint32, num * 2);
 360     PROP_SETA32(RootWindow(ob_display, ob_screen),
 361                 net_desktop_viewport, cardinal, viewport, num * 2);
 362     g_free(viewport);
 363
 364     /* the number of rows/columns will differ */
 365     screen_update_layout();
 366
 367     /* may be some unnamed desktops that we need to fill in with names */
 368     screen_update_desktop_names();
 369
 370     /* move windows on desktops that will no longer exist! */
 371     for (it = client_list; it != NULL; it = it->next) {
 372         ObClient *c = it->data;
 373         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 374             client_set_desktop(c, num - 1, FALSE);
 375     }
 376
 377     /* change our struts/area to match (after moving windows) */
 378     screen_update_areas();
 379
 380     /* change our desktop if we're on one that no longer exists! */
 381     if (screen_desktop >= screen_num_desktops)
 382         screen_set_desktop(num - 1);
 383
 384    /* update the focus lists */
 385     /* free our lists for the desktops which have disappeared */
 386     for (i = num; i < old; ++i)
 387         g_list_free(focus_order[i]);
 388     /* realloc the array */
 389     focus_order = g_renew(GList*, focus_order, num);
 390     /* set the new lists to be empty */
 391     for (i = old; i < num; ++i)
 392         focus_order[i] = NULL;
 393 }
 394
 395 void screen_set_desktop(guint num)
 396 {
 397     GList *it;
 398     guint old;
 399     XEvent e;
 400
 401     g_assert(num < screen_num_desktops);
 402
 403     old = screen_desktop;
 404     screen_desktop = num;
 405     PROP_SET32(RootWindow(ob_display, ob_screen),
 406                net_current_desktop, cardinal, num);
 407
 408     if (old == num) return;
 409
 410     screen_last_desktop = old;
 411
 412     ob_debug("Moving to desktop %d\n", num+1);
 413
 414     if (moveresize_client)
 415         client_set_desktop(moveresize_client, num, TRUE);
 416
 417     /* show windows before hiding the rest to lessen the enter/leave events */
 418
 419     /* show windows from top to bottom */
 420     for (it = stacking_list; it != NULL; it = it->next) {
 421         if (WINDOW_IS_CLIENT(it->data)) {
 422             ObClient *c = it->data;
 423             if (!c->frame->visible && client_should_show(c))
 424                 frame_show(c->frame);
 425         }
 426     }
 427
 428     /* hide windows from bottom to top */
 429     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 430         if (WINDOW_IS_CLIENT(it->data)) {
 431             ObClient *c = it->data;
 432             if (c->frame->visible && !client_should_show(c))
 433                 frame_hide(c->frame);
 434         }
 435     }
 436
 437     XSync(ob_display, FALSE);
 438     /* focus the last focused window on the desktop, and ignore enter events
 439        from the switch so it doesnt mess with the focus */
 440     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
 441 #ifdef DEBUG_FOCUS
 442     ob_debug("switch fallback\n");
 443 #endif
 444     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
 445 #ifdef DEBUG_FOCUS
 446     ob_debug("/switch fallback\n");
 447 #endif
 448 }
 449
 450 static void get_row_col(guint d, guint *r, guint *c)
 451 {
 452     switch (screen_desktop_layout.orientation) {
 453     case OB_ORIENTATION_HORZ:
 454         switch (screen_desktop_layout.start_corner) {
 455         case OB_CORNER_TOPLEFT:
 456             *r = d / screen_desktop_layout.columns;
 457             *c = d % screen_desktop_layout.columns;
 458             break;
 459         case OB_CORNER_BOTTOMLEFT:
 460             *r = screen_desktop_layout.rows - 1 -
 461                 d / screen_desktop_layout.columns;
 462             *c = d % screen_desktop_layout.columns;
 463             break;
 464         case OB_CORNER_TOPRIGHT:
 465             *r = d / screen_desktop_layout.columns;
 466             *c = screen_desktop_layout.columns - 1 -
 467                 d % screen_desktop_layout.columns;
 468             break;
 469         case OB_CORNER_BOTTOMRIGHT:
 470             *r = screen_desktop_layout.rows - 1 -
 471                 d / screen_desktop_layout.columns;
 472             *c = screen_desktop_layout.columns - 1 -
 473                 d % screen_desktop_layout.columns;
 474             break;
 475         }
 476         break;
 477     case OB_ORIENTATION_VERT:
 478         switch (screen_desktop_layout.start_corner) {
 479         case OB_CORNER_TOPLEFT:
 480             *r = d % screen_desktop_layout.rows;
 481             *c = d / screen_desktop_layout.rows;
 482             break;
 483         case OB_CORNER_BOTTOMLEFT:
 484             *r = screen_desktop_layout.rows - 1 -
 485                 d % screen_desktop_layout.rows;
 486             *c = d / screen_desktop_layout.rows;
 487             break;
 488         case OB_CORNER_TOPRIGHT:
 489             *r = d % screen_desktop_layout.rows;
 490             *c = screen_desktop_layout.columns - 1 -
 491                 d / screen_desktop_layout.rows;
 492             break;
 493         case OB_CORNER_BOTTOMRIGHT:
 494             *r = screen_desktop_layout.rows - 1 -
 495                 d % screen_desktop_layout.rows;
 496             *c = screen_desktop_layout.columns - 1 -
 497                 d / screen_desktop_layout.rows;
 498             break;
 499         }
 500         break;
 501     }
 502 }
 503
 504 static guint translate_row_col(guint r, guint c)
 505 {
 506     switch (screen_desktop_layout.orientation) {
 507     case OB_ORIENTATION_HORZ:
 508         switch (screen_desktop_layout.start_corner) {
 509         case OB_CORNER_TOPLEFT:
 510             return r % screen_desktop_layout.rows *
 511                 screen_desktop_layout.columns +
 512                 c % screen_desktop_layout.columns;
 513         case OB_CORNER_BOTTOMLEFT:
 514             return (screen_desktop_layout.rows - 1 -
 515                     r % screen_desktop_layout.rows) *
 516                 screen_desktop_layout.columns +
 517                 c % screen_desktop_layout.columns;
 518         case OB_CORNER_TOPRIGHT:
 519             return r % screen_desktop_layout.rows *
 520                 screen_desktop_layout.columns +
 521                 (screen_desktop_layout.columns - 1 -
 522                  c % screen_desktop_layout.columns);
 523         case OB_CORNER_BOTTOMRIGHT:
 524             return (screen_desktop_layout.rows - 1 -
 525                     r % screen_desktop_layout.rows) *
 526                 screen_desktop_layout.columns +
 527                 (screen_desktop_layout.columns - 1 -
 528                  c % screen_desktop_layout.columns);
 529         }
 530     case OB_ORIENTATION_VERT:
 531         switch (screen_desktop_layout.start_corner) {
 532         case OB_CORNER_TOPLEFT:
 533             return c % screen_desktop_layout.columns *
 534                 screen_desktop_layout.rows +
 535                 r % screen_desktop_layout.rows;
 536         case OB_CORNER_BOTTOMLEFT:
 537             return c % screen_desktop_layout.columns *
 538                 screen_desktop_layout.rows +
 539                 (screen_desktop_layout.rows - 1 -
 540                  r % screen_desktop_layout.rows);
 541         case OB_CORNER_TOPRIGHT:
 542             return (screen_desktop_layout.columns - 1 -
 543                     c % screen_desktop_layout.columns) *
 544                 screen_desktop_layout.rows +
 545                 r % screen_desktop_layout.rows;
 546         case OB_CORNER_BOTTOMRIGHT:
 547             return (screen_desktop_layout.columns - 1 -
 548                     c % screen_desktop_layout.columns) *
 549                 screen_desktop_layout.rows +
 550                 (screen_desktop_layout.rows - 1 -
 551                  r % screen_desktop_layout.rows);
 552         }
 553     }
 554     g_assert_not_reached();
 555     return 0;
 556 }
 557
 558 static void popup_cycle(guint d, gboolean show)
 559 {
 560     Rect *a;
 561
 562     if (!show) {
 563         pager_popup_hide(desktop_cycle_popup);
 564     } else {
 565         a = screen_physical_area_monitor(0);
 566         pager_popup_position(desktop_cycle_popup, CenterGravity,
 567                              a->x + a->width / 2, a->y + a->height / 2);
 568         /* XXX the size and the font extents need to be related on some level
 569          */
 570         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 571
 572         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 573
 574         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 575     }
 576 }
 577
 578 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 579                            gboolean dialog, gboolean done, gboolean cancel)
 580 {
 581     static gboolean first = TRUE;
 582     static gboolean lin;
 583     static guint origd, d;
 584     guint r, c;
 585
 586     if (cancel) {
 587         d = origd;
 588         goto done_cycle;
 589     } else if (done && dialog) {
 590         goto done_cycle;
 591     }
 592     if (first) {
 593         first = FALSE;
 594         lin = linear;
 595         d = origd = screen_desktop;
 596     }
 597
 598     get_row_col(d, &r, &c);
 599
 600     if (lin) {
 601         switch (dir) {
 602         case OB_DIRECTION_EAST:
 603             if (d < screen_num_desktops - 1)
 604                 ++d;
 605             else if (wrap)
 606                 d = 0;
 607             break;
 608         case OB_DIRECTION_WEST:
 609             if (d > 0)
 610                 --d;
 611             else if (wrap)
 612                 d = screen_num_desktops - 1;
 613             break;
 614         default:
 615             assert(0);
 616             return screen_desktop;
 617         }
 618     } else {
 619         switch (dir) {
 620         case OB_DIRECTION_EAST:
 621             ++c;
 622             if (c >= screen_desktop_layout.columns) {
 623                 if (!wrap) return d = screen_desktop;
 624                 c = 0;
 625             }
 626             d = translate_row_col(r, c);
 627             if (d >= screen_num_desktops) {
 628                 if (!wrap) return d = screen_desktop;
 629                 ++c;
 630             }
 631             break;
 632         case OB_DIRECTION_WEST:
 633             --c;
 634             if (c >= screen_desktop_layout.columns) {
 635                 if (!wrap) return d = screen_desktop;
 636                 c = screen_desktop_layout.columns - 1;
 637             }
 638             d = translate_row_col(r, c);
 639             if (d >= screen_num_desktops) {
 640                 if (!wrap) return d = screen_desktop;
 641                 --c;
 642             }
 643             break;
 644         case OB_DIRECTION_SOUTH:
 645             ++r;
 646             if (r >= screen_desktop_layout.rows) {
 647                 if (!wrap) return d = screen_desktop;
 648                 r = 0;
 649             }
 650             d = translate_row_col(r, c);
 651             if (d >= screen_num_desktops) {
 652                 if (!wrap) return d = screen_desktop;
 653                 ++r;
 654             }
 655             break;
 656         case OB_DIRECTION_NORTH:
 657             --r;
 658             if (r >= screen_desktop_layout.rows) {
 659                 if (!wrap) return d = screen_desktop;
 660                 r = screen_desktop_layout.rows - 1;
 661             }
 662             d = translate_row_col(r, c);
 663             if (d >= screen_num_desktops) {
 664                 if (!wrap) return d = screen_desktop;
 665                 --r;
 666             }
 667             break;
 668         default:
 669             assert(0);
 670             return d = screen_desktop;
 671         }
 672
 673         d = translate_row_col(r, c);
 674     }
 675
 676     if (dialog) {
 677         popup_cycle(d, TRUE);
 678         return d;
 679     }
 680
 681 done_cycle:
 682     first = TRUE;
 683
 684     popup_cycle(0, FALSE);
 685
 686     return d;
 687 }
 688
 689 void screen_update_layout()
 690 {
 691     ObOrientation orient;
 692     ObCorner corner;
 693     guint rows;
 694     guint cols;
 695     guint32 *data;
 696     guint num;
 697     gboolean valid = FALSE;
 698
 699     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 700                     net_desktop_layout, cardinal, &data, &num)) {
 701         if (num == 3 || num == 4) {
 702
 703             if (data[0] == prop_atoms.net_wm_orientation_vert)
 704                 orient = OB_ORIENTATION_VERT;
 705             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 706                 orient = OB_ORIENTATION_HORZ;
 707             else
 708                 goto screen_update_layout_bail;
 709
 710             if (num < 4)
 711                 corner = OB_CORNER_TOPLEFT;
 712             else {
 713                 if (data[3] == prop_atoms.net_wm_topleft)
 714                     corner = OB_CORNER_TOPLEFT;
 715                 else if (data[3] == prop_atoms.net_wm_topright)
 716                     corner = OB_CORNER_TOPRIGHT;
 717                 else if (data[3] == prop_atoms.net_wm_bottomright)
 718                     corner = OB_CORNER_BOTTOMRIGHT;
 719                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 720                     corner = OB_CORNER_BOTTOMLEFT;
 721                 else
 722                     goto screen_update_layout_bail;
 723             }
 724
 725             cols = data[1];
 726             rows = data[2];
 727
 728             /* fill in a zero rows/columns */
 729             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 730                 goto screen_update_layout_bail;
 731             } else {
 732                 if (cols == 0) {
 733                     cols = screen_num_desktops / rows;
 734                     if (rows * cols < screen_num_desktops)
 735                         cols++;
 736                     if (rows * cols >= screen_num_desktops + cols)
 737                         rows--;
 738                 } else if (rows == 0) {
 739                     rows = screen_num_desktops / rows;
 740                     if (cols * rows < screen_num_desktops)
 741                         rows++;
 742                     if (cols * rows >= screen_num_desktops + rows)
 743                         cols--;
 744                 }
 745             }
 746
 747             /* bounds checking */
 748             if (orient == OB_ORIENTATION_HORZ) {
 749                 cols = MIN(screen_num_desktops, cols);
 750                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 751                 cols = screen_num_desktops / rows +
 752                     !!(screen_num_desktops % rows);
 753             } else {
 754                 rows = MIN(screen_num_desktops, rows);
 755                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 756                 rows = screen_num_desktops / cols +
 757                     !!(screen_num_desktops % cols);
 758             }
 759
 760             valid = TRUE;
 761         }
 762     screen_update_layout_bail:
 763         g_free(data);
 764     }
 765
 766     if (!valid) {
 767         /* defaults */
 768         orient = OB_ORIENTATION_HORZ;
 769         corner = OB_CORNER_TOPLEFT;
 770         rows = 1;
 771         cols = screen_num_desktops;
 772     }
 773
 774     screen_desktop_layout.orientation = orient;
 775     screen_desktop_layout.start_corner = corner;
 776     screen_desktop_layout.rows = rows;
 777     screen_desktop_layout.columns = cols;
 778 }
 779
 780 void screen_update_desktop_names()
 781 {
 782     guint i;
 783
 784     /* empty the array */
 785     g_strfreev(screen_desktop_names);
 786     screen_desktop_names = NULL;
 787
 788     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 789                    net_desktop_names, utf8, &screen_desktop_names))
 790         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 791     else
 792         i = 0;
 793     if (i <= screen_num_desktops) {
 794         screen_desktop_names = g_renew(char*, screen_desktop_names,
 795                                        screen_num_desktops + 1);
 796         screen_desktop_names[screen_num_desktops] = NULL;
 797         for (; i < screen_num_desktops; ++i)
 798             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 799     }
 800 }
 801
 802 void screen_show_desktop(gboolean show)
 803 {
 804     GList *it;
 805
 806     if (show == screen_showing_desktop) return; /* no change */
 807
 808     screen_showing_desktop = show;
 809
 810     if (show) {
 811         /* bottom to top */
 812         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 813             if (WINDOW_IS_CLIENT(it->data)) {
 814                 ObClient *client = it->data;
 815                 if (client->frame->visible && !client_should_show(client))
 816                     frame_hide(client->frame);
 817             }
 818         }
 819     } else {
 820         /* top to bottom */
 821         for (it = stacking_list; it != NULL; it = it->next) {
 822             if (WINDOW_IS_CLIENT(it->data)) {
 823                 ObClient *client = it->data;
 824                 if (!client->frame->visible && client_should_show(client))
 825                     frame_show(client->frame);
 826             }
 827         }
 828     }
 829
 830     if (show) {
 831         /* focus desktop */
 832         for (it = focus_order[screen_desktop]; it; it = it->next)
 833             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 834                 client_focus(it->data))
 835                 break;
 836     } else {
 837         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 838     }
 839
 840     show = !!show; /* make it boolean */
 841     PROP_SET32(RootWindow(ob_display, ob_screen),
 842                net_showing_desktop, cardinal, show);
 843 }
 844
 845 void screen_install_colormap(ObClient *client, gboolean install)
 846 {
 847     XWindowAttributes wa;
 848
 849     if (client == NULL) {
 850         if (install)
 851             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 852         else
 853             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 854     } else {
 855         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 856             wa.colormap != None) {
 857             xerror_set_ignore(TRUE);
 858             if (install)
 859                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 860             else
 861                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 862             xerror_set_ignore(FALSE);
 863         }
 864     }
 865 }
 866
 867 void screen_update_areas()
 868 {
 869     guint i, x;
 870     guint32 *dims;
 871     GList *it;
 872
 873     g_free(monitor_area);
 874     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 875
 876     if (area) {
 877         for (i = 0; area[i]; ++i)
 878             g_free(area[i]);
 879         g_free(area);
 880     }
 881
 882     area = g_new(Rect*, screen_num_desktops + 2);
 883     for (i = 0; i < screen_num_desktops + 1; ++i)
 884         area[i] = g_new(Rect, screen_num_monitors + 1);
 885     area[i] = NULL;
 886
 887     dims = g_new(guint32, 4 * screen_num_desktops);
 888
 889     for (i = 0; i < screen_num_desktops + 1; ++i) {
 890         Strut s;
 891         int l, r, t, b;
 892
 893         /* calc the xinerama areas */
 894         for (x = 0; x < screen_num_monitors; ++x) {
 895             area[i][x] = monitor_area[x];
 896             if (x == 0) {
 897                 l = monitor_area[x].x;
 898                 t = monitor_area[x].y;
 899                 r = monitor_area[x].x + monitor_area[x].width - 1;
 900                 b = monitor_area[x].y + monitor_area[x].height - 1;
 901             } else {
 902                 l = MIN(l, monitor_area[x].x);
 903                 t = MIN(t, monitor_area[x].y);
 904                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 905                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 906             }
 907         }
 908         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 909
 910         /* apply struts */
 911         STRUT_SET(s, 0, 0, 0, 0);
 912         for (it = client_list; it; it = it->next)
 913             STRUT_ADD(s, ((ObClient*)it->data)->strut);
 914         STRUT_ADD(s, dock_strut);
 915
 916         if (s.left) {
 917             int o;
 918
 919             /* find the left-most xin heads, i do this in 2 loops :| */
 920             o = area[i][0].x;
 921             for (x = 1; x < screen_num_monitors; ++x)
 922                 o = MIN(o, area[i][x].x);
 923
 924             for (x = 0; x < screen_num_monitors; ++x) {
 925                 int edge = o + s.left - area[i][x].x;
 926                 if (edge > 0) {
 927                     area[i][x].x += edge;
 928                     area[i][x].width -= edge;
 929                 }
 930             }
 931
 932             area[i][screen_num_monitors].x += s.left;
 933             area[i][screen_num_monitors].width -= s.left;
 934         }
 935         if (s.top) {
 936             int o;
 937
 938             /* find the left-most xin heads, i do this in 2 loops :| */
 939             o = area[i][0].y;
 940             for (x = 1; x < screen_num_monitors; ++x)
 941                 o = MIN(o, area[i][x].y);
 942
 943             for (x = 0; x < screen_num_monitors; ++x) {
 944                 int edge = o + s.top - area[i][x].y;
 945                 if (edge > 0) {
 946                     area[i][x].y += edge;
 947                     area[i][x].height -= edge;
 948                 }
 949             }
 950
 951             area[i][screen_num_monitors].y += s.top;
 952             area[i][screen_num_monitors].height -= s.top;
 953         }
 954         if (s.right) {
 955             int o;
 956
 957             /* find the bottom-most xin heads, i do this in 2 loops :| */
 958             o = area[i][0].x + area[i][0].width - 1;
 959             for (x = 1; x < screen_num_monitors; ++x)
 960                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
 961
 962             for (x = 0; x < screen_num_monitors; ++x) {
 963                 int edge = (area[i][x].x + area[i][x].width - 1) -
 964                     (o - s.right);
 965                 if (edge > 0)
 966                     area[i][x].width -= edge;
 967             }
 968
 969             area[i][screen_num_monitors].width -= s.right;
 970         }
 971         if (s.bottom) {
 972             int o;
 973
 974             /* find the bottom-most xin heads, i do this in 2 loops :| */
 975             o = area[i][0].y + area[i][0].height - 1;
 976             for (x = 1; x < screen_num_monitors; ++x)
 977                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
 978
 979             for (x = 0; x < screen_num_monitors; ++x) {
 980                 int edge = (area[i][x].y + area[i][x].height - 1) -
 981                     (o - s.bottom);
 982                 if (edge > 0)
 983                     area[i][x].height -= edge;
 984             }
 985
 986             area[i][screen_num_monitors].height -= s.bottom;
 987         }
 988
 989         /* XXX when dealing with partial struts, if its in a single
 990            xinerama area, then only subtract it from that area's space
 991         for (x = 0; x < screen_num_monitors; ++x) {
 992             GList *it;
 993
 994
 995                do something smart with it for the 'all xinerama areas' one...
 996
 997             for (it = client_list; it; it = it->next) {
 998
 999                 XXX if gunna test this shit, then gotta worry about when
1000                 the client moves between xinerama heads..
1001
1002                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
1003                                        area[i][x])) {
1004
1005                 }
1006             }
1007         }
1008         */
1009
1010         /* XXX optimize when this is run? */
1011
1012         /* the area has changed, adjust all the maximized
1013            windows */
1014         for (it = client_list; it; it = it->next) {
1015             ObClient *c = it->data;
1016             if (i < screen_num_desktops) {
1017                 if (c->desktop == i)
1018                     client_reconfigure(c);
1019             } else if (c->desktop == DESKTOP_ALL)
1020                 client_reconfigure(c);
1021         }
1022         if (i < screen_num_desktops) {
1023             /* don't set these for the 'all desktops' area */
1024             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1025             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1026             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1027             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1028         }
1029     }
1030     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1031                 dims, 4 * screen_num_desktops);
1032
1033     g_free(dims);
1034 }
1035
1036 Rect *screen_area(guint desktop)
1037 {
1038     return screen_area_monitor(desktop, screen_num_monitors);
1039 }
1040
1041 Rect *screen_area_monitor(guint desktop, guint head)
1042 {
1043     if (head > screen_num_monitors)
1044         return NULL;
1045     if (desktop >= screen_num_desktops) {
1046         if (desktop == DESKTOP_ALL)
1047             return &area[screen_num_desktops][head];
1048         return NULL;
1049     }
1050     return &area[desktop][head];
1051 }
1052
1053 Rect *screen_physical_area()
1054 {
1055     return screen_physical_area_monitor(screen_num_monitors);
1056 }
1057
1058 Rect *screen_physical_area_monitor(guint head)
1059 {
1060     if (head > screen_num_monitors)
1061         return NULL;
1062     return &monitor_area[head];
1063 }
1064
1065 void screen_set_root_cursor()
1066 {
1067     if (sn_app_starting())
1068         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1069                       ob_cursor(OB_CURSOR_BUSY));
1070     else
1071         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1072                       ob_cursor(OB_CURSOR_POINTER));
1073 }
1074
1075 gboolean screen_pointer_pos(int *x, int *y)
1076 {
1077     Window w;
1078     int i;
1079     guint u;
1080
1081     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1082                            &w, &w, x, y, &i, &i, &u);
1083 }