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