openbox/screen.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    screen.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "debug.h"
  21 #include "openbox.h"
  22 #include "dock.h"
  23 #include "grab.h"
  24 #include "startupnotify.h"
  25 #include "moveresize.h"
  26 #include "config.h"
  27 #include "screen.h"
  28 #include "client.h"
  29 #include "session.h"
  30 #include "frame.h"
  31 #include "event.h"
  32 #include "focus.h"
  33 #include "popup.h"
  34 #include "render/render.h"
  35 #include "gettext.h"
  36 #include "obt/display.h"
  37 #include "obt/prop.h"
  38 #include "obt/mainloop.h"
  39
  40 #include <X11/Xlib.h>
  41 #ifdef HAVE_UNISTD_H
  42 #  include <sys/types.h>
  43 #  include <unistd.h>
  44 #endif
  45 #include <assert.h>
  46
  47 /*! The event mask to grab on the root window */
  48 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  49                         EnterWindowMask | LeaveWindowMask | \
  50                         SubstructureRedirectMask | FocusChangeMask | \
  51                         ButtonPressMask | ButtonReleaseMask)
  52
  53 static gboolean screen_validate_layout(ObDesktopLayout *l);
  54 static gboolean replace_wm(void);
  55 static void     screen_tell_ksplash(void);
  56 static void     screen_fallback_focus(void);
  57
  58 guint           screen_num_desktops;
  59 guint           screen_num_monitors;
  60 guint           screen_desktop;
  61 guint           screen_last_desktop;
  62 gboolean        screen_showing_desktop;
  63 ObDesktopLayout screen_desktop_layout;
  64 gchar         **screen_desktop_names;
  65 Window          screen_support_win;
  66 Time            screen_desktop_user_time = CurrentTime;
  67
  68 static Size     screen_physical_size;
  69 static guint    screen_old_desktop;
  70 static gboolean screen_desktop_timeout = TRUE;
  71 /*! An array of desktops, holding an array of areas per monitor */
  72 static Rect  *monitor_area = NULL;
  73 /*! An array of desktops, holding an array of struts */
  74 static GSList *struts_top = NULL;
  75 static GSList *struts_left = NULL;
  76 static GSList *struts_right = NULL;
  77 static GSList *struts_bottom = NULL;
  78
  79 static ObPagerPopup *desktop_popup;
  80 static gboolean      desktop_popup_perm;
  81
  82 /*! The number of microseconds that you need to be on a desktop before it will
  83   replace the remembered "last desktop" */
  84 #define REMEMBER_LAST_DESKTOP_TIME 750000
  85
  86 static gboolean replace_wm(void)
  87 {
  88     gchar *wm_sn;
  89     Atom wm_sn_atom;
  90     Window current_wm_sn_owner;
  91     Time timestamp;
  92
  93     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  94     wm_sn_atom = XInternAtom(obt_display, wm_sn, FALSE);
  95     g_free(wm_sn);
  96
  97     current_wm_sn_owner = XGetSelectionOwner(obt_display, wm_sn_atom);
  98     if (current_wm_sn_owner == screen_support_win)
  99         current_wm_sn_owner = None;
 100     if (current_wm_sn_owner) {
 101         if (!ob_replace_wm) {
 102             g_message(_("A window manager is already running on screen %d"),
 103                       ob_screen);
 104             return FALSE;
 105         }
 106         obt_display_ignore_errors(TRUE);
 107
 108         /* We want to find out when the current selection owner dies */
 109         XSelectInput(obt_display, current_wm_sn_owner, StructureNotifyMask);
 110         XSync(obt_display, FALSE);
 111
 112         obt_display_ignore_errors(FALSE);
 113         if (obt_display_error_occured)
 114             current_wm_sn_owner = None;
 115     }
 116
 117     timestamp = event_get_server_time();
 118
 119     XSetSelectionOwner(obt_display, wm_sn_atom, screen_support_win,
 120                        timestamp);
 121
 122     if (XGetSelectionOwner(obt_display, wm_sn_atom) != screen_support_win) {
 123         g_message(_("Could not acquire window manager selection on screen %d"),
 124                   ob_screen);
 125         return FALSE;
 126     }
 127
 128     /* Wait for old window manager to go away */
 129     if (current_wm_sn_owner) {
 130       XEvent event;
 131       gulong wait = 0;
 132       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 133
 134       while (wait < timeout) {
 135           if (XCheckWindowEvent(obt_display, current_wm_sn_owner,
 136                                 StructureNotifyMask, &event) &&
 137               event.type == DestroyNotify)
 138               break;
 139           g_usleep(G_USEC_PER_SEC / 10);
 140           wait += G_USEC_PER_SEC / 10;
 141       }
 142
 143       if (wait >= timeout) {
 144           g_message(_("The WM on screen %d is not exiting"), ob_screen);
 145           return FALSE;
 146       }
 147     }
 148
 149     /* Send client message indicating that we are now the WM */
 150     obt_prop_message(ob_screen, obt_root(ob_screen), OBT_PROP_ATOM(MANAGER),
 151                      timestamp, wm_sn_atom, screen_support_win, 0, 0,
 152                      SubstructureNotifyMask);
 153
 154     return TRUE;
 155 }
 156
 157 gboolean screen_annex(void)
 158 {
 159     XSetWindowAttributes attrib;
 160     pid_t pid;
 161     gint i, num_support;
 162     gulong *supported;
 163
 164     /* create the netwm support window */
 165     attrib.override_redirect = TRUE;
 166     attrib.event_mask = PropertyChangeMask;
 167     screen_support_win = XCreateWindow(obt_display, obt_root(ob_screen),
 168                                        -100, -100, 1, 1, 0,
 169                                        CopyFromParent, InputOutput,
 170                                        CopyFromParent,
 171                                        CWEventMask | CWOverrideRedirect,
 172                                        &attrib);
 173     XMapWindow(obt_display, screen_support_win);
 174     XLowerWindow(obt_display, screen_support_win);
 175
 176     if (!replace_wm()) {
 177         XDestroyWindow(obt_display, screen_support_win);
 178         return FALSE;
 179     }
 180
 181     obt_display_ignore_errors(TRUE);
 182     XSelectInput(obt_display, obt_root(ob_screen), ROOT_EVENTMASK);
 183     obt_display_ignore_errors(FALSE);
 184     if (obt_display_error_occured) {
 185         g_message(_("A window manager is already running on screen %d"),
 186                   ob_screen);
 187
 188         XDestroyWindow(obt_display, screen_support_win);
 189         return FALSE;
 190     }
 191
 192     screen_set_root_cursor();
 193
 194     /* set the OPENBOX_PID hint */
 195     pid = getpid();
 196     OBT_PROP_SET32(obt_root(ob_screen), OPENBOX_PID, CARDINAL, pid);
 197
 198     /* set supporting window */
 199     OBT_PROP_SET32(obt_root(ob_screen),
 200                    NET_SUPPORTING_WM_CHECK, WINDOW, screen_support_win);
 201
 202     /* set properties on the supporting window */
 203     OBT_PROP_SETS(screen_support_win, NET_WM_NAME, utf8, "Openbox");
 204     OBT_PROP_SET32(screen_support_win, NET_SUPPORTING_WM_CHECK,
 205                    WINDOW, screen_support_win);
 206
 207     /* set the _NET_SUPPORTED_ATOMS hint */
 208
 209     /* this is all the atoms after NET_SUPPORTED in the ObtPropAtoms enum */
 210     num_support = OBT_PROP_NUM_ATOMS - OBT_PROP_NET_SUPPORTED - 1;
 211     i = 0;
 212     supported = g_new(gulong, num_support);
 213     supported[i++] = OBT_PROP_ATOM(NET_SUPPORTING_WM_CHECK);
 214     supported[i++] = OBT_PROP_ATOM(NET_WM_FULL_PLACEMENT);
 215     supported[i++] = OBT_PROP_ATOM(NET_CURRENT_DESKTOP);
 216     supported[i++] = OBT_PROP_ATOM(NET_NUMBER_OF_DESKTOPS);
 217     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_GEOMETRY);
 218     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_VIEWPORT);
 219     supported[i++] = OBT_PROP_ATOM(NET_ACTIVE_WINDOW);
 220     supported[i++] = OBT_PROP_ATOM(NET_WORKAREA);
 221     supported[i++] = OBT_PROP_ATOM(NET_CLIENT_LIST);
 222     supported[i++] = OBT_PROP_ATOM(NET_CLIENT_LIST_STACKING);
 223     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_NAMES);
 224     supported[i++] = OBT_PROP_ATOM(NET_CLOSE_WINDOW);
 225     supported[i++] = OBT_PROP_ATOM(NET_DESKTOP_LAYOUT);
 226     supported[i++] = OBT_PROP_ATOM(NET_SHOWING_DESKTOP);
 227     supported[i++] = OBT_PROP_ATOM(NET_WM_NAME);
 228     supported[i++] = OBT_PROP_ATOM(NET_WM_VISIBLE_NAME);
 229     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON_NAME);
 230     supported[i++] = OBT_PROP_ATOM(NET_WM_VISIBLE_ICON_NAME);
 231     supported[i++] = OBT_PROP_ATOM(NET_WM_DESKTOP);
 232     supported[i++] = OBT_PROP_ATOM(NET_WM_STRUT);
 233     supported[i++] = OBT_PROP_ATOM(NET_WM_STRUT_PARTIAL);
 234     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON);
 235     supported[i++] = OBT_PROP_ATOM(NET_WM_ICON_GEOMETRY);
 236     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE);
 237     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DESKTOP);
 238     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DOCK);
 239     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_TOOLBAR);
 240     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_MENU);
 241     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_UTILITY);
 242     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_SPLASH);
 243     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DIALOG);
 244     supported[i++] = OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_NORMAL);
 245     supported[i++] = OBT_PROP_ATOM(NET_WM_ALLOWED_ACTIONS);
 246     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MOVE);
 247     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_RESIZE);
 248     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MINIMIZE);
 249     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_SHADE);
 250     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MAXIMIZE_HORZ);
 251     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_MAXIMIZE_VERT);
 252     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_FULLSCREEN);
 253     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_CHANGE_DESKTOP);
 254     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_CLOSE);
 255     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_ABOVE);
 256     supported[i++] = OBT_PROP_ATOM(NET_WM_ACTION_BELOW);
 257     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE);
 258     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MODAL);
 259     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MAXIMIZED_VERT);
 260     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_MAXIMIZED_HORZ);
 261     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SHADED);
 262     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SKIP_TASKBAR);
 263     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_SKIP_PAGER);
 264     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_HIDDEN);
 265     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_FULLSCREEN);
 266     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_ABOVE);
 267     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_BELOW);
 268     supported[i++] = OBT_PROP_ATOM(NET_WM_STATE_DEMANDS_ATTENTION);
 269     supported[i++] = OBT_PROP_ATOM(NET_MOVERESIZE_WINDOW);
 270     supported[i++] = OBT_PROP_ATOM(NET_WM_MOVERESIZE);
 271     supported[i++] = OBT_PROP_ATOM(NET_WM_USER_TIME);
 272 /*
 273     supported[i++] = OBT_PROP_ATOM(NET_WM_USER_TIME_WINDOW);
 274 */
 275     supported[i++] = OBT_PROP_ATOM(NET_FRAME_EXTENTS);
 276     supported[i++] = OBT_PROP_ATOM(NET_REQUEST_FRAME_EXTENTS);
 277     supported[i++] = OBT_PROP_ATOM(NET_RESTACK_WINDOW);
 278     supported[i++] = OBT_PROP_ATOM(NET_STARTUP_ID);
 279 #ifdef SYNC
 280     supported[i++] = OBT_PROP_ATOM(NET_WM_SYNC_REQUEST);
 281     supported[i++] = OBT_PROP_ATOM(NET_WM_SYNC_REQUEST_COUNTER);
 282 #endif
 283     supported[i++] = OBT_PROP_ATOM(NET_WM_PID);
 284     supported[i++] = OBT_PROP_ATOM(NET_WM_PING);
 285
 286     supported[i++] = OBT_PROP_ATOM(KDE_WM_CHANGE_STATE);
 287     supported[i++] = OBT_PROP_ATOM(KDE_NET_WM_FRAME_STRUT);
 288     supported[i++] = OBT_PROP_ATOM(KDE_NET_WM_WINDOW_TYPE_OVERRIDE);
 289
 290     supported[i++] = OBT_PROP_ATOM(OB_WM_ACTION_UNDECORATE);
 291     supported[i++] = OBT_PROP_ATOM(OB_WM_STATE_UNDECORATED);
 292     supported[i++] = OBT_PROP_ATOM(OPENBOX_PID);
 293     supported[i++] = OBT_PROP_ATOM(OB_THEME);
 294     supported[i++] = OBT_PROP_ATOM(OB_CONFIG_FILE);
 295     supported[i++] = OBT_PROP_ATOM(OB_CONTROL);
 296     supported[i++] = OBT_PROP_ATOM(OB_ROLE);
 297     supported[i++] = OBT_PROP_ATOM(OB_NAME);
 298     supported[i++] = OBT_PROP_ATOM(OB_CLASS);
 299     g_assert(i == num_support);
 300
 301     OBT_PROP_SETA32(obt_root(ob_screen),
 302                     NET_SUPPORTED, ATOM, supported, num_support);
 303     g_free(supported);
 304
 305     screen_tell_ksplash();
 306
 307     return TRUE;
 308 }
 309
 310 static void screen_tell_ksplash(void)
 311 {
 312     XEvent e;
 313     char **argv;
 314
 315     argv = g_new(gchar*, 6);
 316     argv[0] = g_strdup("dcop");
 317     argv[1] = g_strdup("ksplash");
 318     argv[2] = g_strdup("ksplash");
 319     argv[3] = g_strdup("upAndRunning(QString)");
 320     argv[4] = g_strdup("wm started");
 321     argv[5] = NULL;
 322
 323     /* tell ksplash through the dcop server command line interface */
 324     g_spawn_async(NULL, argv, NULL,
 325                   G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
 326                   G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
 327                   NULL, NULL, NULL, NULL);
 328     g_strfreev(argv);
 329
 330     /* i'm not sure why we do this, kwin does it, but ksplash doesn't seem to
 331        hear it anyways. perhaps it is for old ksplash. or new ksplash. or
 332        something. oh well. */
 333     e.xclient.type = ClientMessage;
 334     e.xclient.display = obt_display;
 335     e.xclient.window = obt_root(ob_screen);
 336     e.xclient.message_type =
 337         XInternAtom(obt_display, "_KDE_SPLASH_PROGRESS", False);
 338     e.xclient.format = 8;
 339     strcpy(e.xclient.data.b, "wm started");
 340     XSendEvent(obt_display, obt_root(ob_screen),
 341                False, SubstructureNotifyMask, &e);
 342 }
 343
 344 void screen_startup(gboolean reconfig)
 345 {
 346     gchar **names = NULL;
 347     guint32 d;
 348     gboolean namesexist = FALSE;
 349
 350     desktop_popup = pager_popup_new();
 351     desktop_popup_perm = FALSE;
 352     pager_popup_height(desktop_popup, POPUP_HEIGHT);
 353
 354     if (reconfig) {
 355         /* update the pager popup's width */
 356         pager_popup_text_width_to_strings(desktop_popup,
 357                                           screen_desktop_names,
 358                                           screen_num_desktops);
 359         return;
 360     }
 361
 362     /* get the initial size */
 363     screen_resize();
 364
 365     /* have names already been set for the desktops? */
 366     if (OBT_PROP_GETSS(obt_root(ob_screen), NET_DESKTOP_NAMES, utf8, &names)) {
 367         g_strfreev(names);
 368         namesexist = TRUE;
 369     }
 370
 371     /* if names don't exist and we have session names, set those.
 372        do this stuff BEFORE setting the number of desktops, because that
 373        will create default names for them
 374     */
 375     if (!namesexist && session_desktop_names != NULL) {
 376         guint i, numnames;
 377         GSList *it;
 378
 379         /* get the desktop names */
 380         numnames = g_slist_length(session_desktop_names);
 381         names = g_new(gchar*, numnames + 1);
 382         names[numnames] = NULL;
 383         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
 384             names[i] = g_strdup(it->data);
 385
 386         /* set the root window property */
 387         OBT_PROP_SETSS(obt_root(ob_screen),
 388                        NET_DESKTOP_NAMES, utf8, (const gchar**)names);
 389
 390         g_strfreev(names);
 391     }
 392
 393     /* set the number of desktops, if it's not already set.
 394
 395        this will also set the default names from the config file up for
 396        desktops that don't have names yet */
 397     screen_num_desktops = 0;
 398     if (OBT_PROP_GET32(obt_root(ob_screen),
 399                        NET_NUMBER_OF_DESKTOPS, CARDINAL, &d))
 400     {
 401         if (d != config_desktops_num) {
 402             /* TRANSLATORS: If you need to specify a different order of the
 403                arguments, you can use %1$d for the first one and %2$d for the
 404                second one. For example,
 405                "The current session has %2$d desktops, but Openbox is configured for %1$d ..." */
 406             g_warning(ngettext("Openbox is configured for %d desktop, but the current session has %d.  Overriding the Openbox configuration.", "Openbox is configured for %d desktops, but the current session has %d.  Overriding the Openbox configuration.", config_desktops_num),
 407                       config_desktops_num, d);
 408         }
 409         screen_set_num_desktops(d);
 410     }
 411     /* restore from session if possible */
 412     else if (session_num_desktops)
 413         screen_set_num_desktops(session_num_desktops);
 414     else
 415         screen_set_num_desktops(config_desktops_num);
 416
 417     screen_desktop = screen_num_desktops;  /* something invalid */
 418     /* start on the current desktop when a wm was already running */
 419     if (OBT_PROP_GET32(obt_root(ob_screen),
 420                        NET_CURRENT_DESKTOP, CARDINAL, &d) &&
 421         d < screen_num_desktops)
 422     {
 423         screen_set_desktop(d, FALSE);
 424     } else if (session_desktop >= 0)
 425         screen_set_desktop(MIN((guint)session_desktop,
 426                                screen_num_desktops), FALSE);
 427     else
 428         screen_set_desktop(MIN(config_screen_firstdesk,
 429                                screen_num_desktops) - 1, FALSE);
 430     screen_last_desktop = screen_desktop;
 431
 432     /* don't start in showing-desktop mode */
 433     screen_showing_desktop = FALSE;
 434     OBT_PROP_SET32(obt_root(ob_screen),
 435                    NET_SHOWING_DESKTOP, CARDINAL, screen_showing_desktop);
 436
 437     if (session_desktop_layout_present &&
 438         screen_validate_layout(&session_desktop_layout))
 439     {
 440         screen_desktop_layout = session_desktop_layout;
 441     }
 442     else
 443         screen_update_layout();
 444 }
 445
 446 void screen_shutdown(gboolean reconfig)
 447 {
 448     pager_popup_free(desktop_popup);
 449
 450     if (reconfig)
 451         return;
 452
 453     XSelectInput(obt_display, obt_root(ob_screen), NoEventMask);
 454
 455     /* we're not running here no more! */
 456     OBT_PROP_ERASE(obt_root(ob_screen), OPENBOX_PID);
 457     /* not without us */
 458     OBT_PROP_ERASE(obt_root(ob_screen), NET_SUPPORTED);
 459     /* don't keep this mode */
 460     OBT_PROP_ERASE(obt_root(ob_screen), NET_SHOWING_DESKTOP);
 461
 462     XDestroyWindow(obt_display, screen_support_win);
 463
 464     g_strfreev(screen_desktop_names);
 465     screen_desktop_names = NULL;
 466 }
 467
 468 void screen_resize(void)
 469 {
 470     static gint oldw = 0, oldh = 0;
 471     gint w, h;
 472     GList *it;
 473     gulong geometry[2];
 474
 475     w = WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen));
 476     h = HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen));
 477
 478     if (w == oldw && h == oldh) return;
 479
 480     oldw = w; oldh = h;
 481
 482     /* Set the _NET_DESKTOP_GEOMETRY hint */
 483     screen_physical_size.width = geometry[0] = w;
 484     screen_physical_size.height = geometry[1] = h;
 485     OBT_PROP_SETA32(obt_root(ob_screen),
 486                     NET_DESKTOP_GEOMETRY, CARDINAL, geometry, 2);
 487
 488     if (ob_state() != OB_STATE_RUNNING)
 489         return;
 490
 491     screen_update_areas();
 492     dock_configure();
 493
 494     for (it = client_list; it; it = g_list_next(it))
 495         client_move_onscreen(it->data, FALSE);
 496 }
 497
 498 void screen_set_num_desktops(guint num)
 499 {
 500     gulong *viewport;
 501     GList *it, *stacking_copy;
 502
 503     g_assert(num > 0);
 504
 505     if (screen_num_desktops == num) return;
 506
 507     screen_num_desktops = num;
 508     OBT_PROP_SET32(obt_root(ob_screen), NET_NUMBER_OF_DESKTOPS, CARDINAL, num);
 509
 510     /* set the viewport hint */
 511     viewport = g_new0(gulong, num * 2);
 512     OBT_PROP_SETA32(obt_root(ob_screen),
 513                     NET_DESKTOP_VIEWPORT, CARDINAL, viewport, num * 2);
 514     g_free(viewport);
 515
 516     /* the number of rows/columns will differ */
 517     screen_update_layout();
 518
 519     /* move windows on desktops that will no longer exist!
 520        make a copy of the list cuz we're changing it */
 521     stacking_copy = g_list_copy(stacking_list);
 522     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 523         if (WINDOW_IS_CLIENT(it->data)) {
 524             ObClient *c = it->data;
 525             if (c->desktop != DESKTOP_ALL && c->desktop >= num)
 526                 client_set_desktop(c, num - 1, FALSE, TRUE);
 527             /* raise all the windows that are on the current desktop which
 528                is being merged */
 529             else if (screen_desktop == num - 1 &&
 530                      (c->desktop == DESKTOP_ALL ||
 531                       c->desktop == screen_desktop))
 532                 stacking_raise(CLIENT_AS_WINDOW(c));
 533         }
 534     }
 535     g_list_free(stacking_copy);
 536
 537     /* change our struts/area to match (after moving windows) */
 538     screen_update_areas();
 539
 540     /* may be some unnamed desktops that we need to fill in with names
 541        (after updating the areas so the popup can resize) */
 542     screen_update_desktop_names();
 543
 544     /* change our desktop if we're on one that no longer exists! */
 545     if (screen_desktop >= screen_num_desktops)
 546         screen_set_desktop(num - 1, TRUE);
 547 }
 548
 549 static void screen_fallback_focus(void)
 550 {
 551     ObClient *c;
 552     gboolean allow_omni;
 553
 554     /* only allow omnipresent windows to get focus on desktop change if
 555        an omnipresent window is already focused (it'll keep focus probably, but
 556        maybe not depending on mouse-focus options) */
 557     allow_omni = focus_client && (client_normal(focus_client) &&
 558                                   focus_client->desktop == DESKTOP_ALL);
 559
 560     /* the client moved there already so don't move focus. prevent flicker
 561        on sendtodesktop + follow */
 562     if (focus_client && focus_client->desktop == screen_desktop)
 563         return;
 564
 565     /* have to try focus here because when you leave an empty desktop
 566        there is no focus out to watch for. also, we have different rules
 567        here. we always allow it to look under the mouse pointer if
 568        config_focus_last is FALSE
 569
 570        do this before hiding the windows so if helper windows are coming
 571        with us, they don't get hidden
 572     */
 573     if ((c = focus_fallback(TRUE, !config_focus_last, allow_omni,
 574                             !allow_omni)))
 575     {
 576         /* only do the flicker reducing stuff ahead of time if we are going
 577            to call xsetinputfocus on the window ourselves. otherwise there is
 578            no guarantee the window will actually take focus.. */
 579         if (c->can_focus) {
 580             /* reduce flicker by hiliting now rather than waiting for the
 581                server FocusIn event */
 582             frame_adjust_focus(c->frame, TRUE);
 583             /* do this here so that if you switch desktops to a window with
 584                helper windows then the helper windows won't flash */
 585             client_bring_helper_windows(c);
 586         }
 587     }
 588 }
 589
 590 static gboolean last_desktop_func(gpointer data)
 591 {
 592     screen_desktop_timeout = TRUE;
 593     return FALSE;
 594 }
 595
 596 void screen_set_desktop(guint num, gboolean dofocus)
 597 {
 598     GList *it;
 599     guint previous;
 600     gulong ignore_start;
 601
 602     g_assert(num < screen_num_desktops);
 603
 604     previous = screen_desktop;
 605     screen_desktop = num;
 606
 607     if (previous == num) return;
 608
 609     OBT_PROP_SET32(obt_root(ob_screen), NET_CURRENT_DESKTOP, CARDINAL, num);
 610
 611     /* This whole thing decides when/how to save the screen_last_desktop so
 612        that it can be restored later if you want */
 613     if (screen_desktop_timeout) {
 614         /* If screen_desktop_timeout is true, then we've been on this desktop
 615            long enough and we can save it as the last desktop. */
 616
 617         if (screen_last_desktop == previous)
 618             /* this is the startup state only */
 619             screen_old_desktop = screen_desktop;
 620         else {
 621             /* save the "last desktop" as the "old desktop" */
 622             screen_old_desktop = screen_last_desktop;
 623             /* save the desktop we're coming from as the "last desktop" */
 624             screen_last_desktop = previous;
 625         }
 626     }
 627     else {
 628         /* If screen_desktop_timeout is false, then we just got to this desktop
 629            and we are moving away again. */
 630
 631         if (screen_desktop == screen_last_desktop) {
 632             /* If we are moving to the "last desktop" .. */
 633             if (previous == screen_old_desktop) {
 634                 /* .. from the "old desktop", change the last desktop to
 635                    be where we are coming from */
 636                 screen_last_desktop = screen_old_desktop;
 637             }
 638             else if (screen_last_desktop == screen_old_desktop) {
 639                 /* .. and also to the "old desktop", change the "last
 640                    desktop" to be where we are coming from */
 641                 screen_last_desktop = previous;
 642             }
 643             else {
 644                 /* .. from some other desktop, then set the "last desktop" to
 645                    be the saved "old desktop", i.e. where we were before the
 646                    "last desktop" */
 647                 screen_last_desktop = screen_old_desktop;
 648             }
 649         }
 650         else {
 651             /* If we are moving to any desktop besides the "last desktop"..
 652                (this is the normal case) */
 653             if (screen_desktop == screen_old_desktop) {
 654                 /* If moving to the "old desktop", which is not the
 655                    "last desktop", don't save anything */
 656             }
 657             else if (previous == screen_old_desktop) {
 658                 /* If moving from the "old desktop", and not to the
 659                    "last desktop", don't save anything */
 660             }
 661             else if (screen_last_desktop == screen_old_desktop) {
 662                 /* If the "last desktop" is the same as "old desktop" and
 663                    you're not moving to the "last desktop" then save where
 664                    we're coming from as the "last desktop" */
 665                 screen_last_desktop = previous;
 666             }
 667             else {
 668                 /* If the "last desktop" is different from the "old desktop"
 669                    and you're not moving to the "last desktop", then don't save
 670                    anything */
 671             }
 672         }
 673     }
 674     screen_desktop_timeout = FALSE;
 675     obt_main_loop_timeout_remove(ob_main_loop, last_desktop_func);
 676     obt_main_loop_timeout_add(ob_main_loop, REMEMBER_LAST_DESKTOP_TIME,
 677                               last_desktop_func, NULL, NULL, NULL);
 678
 679     ob_debug("Moving to desktop %d", num+1);
 680
 681     if (ob_state() == OB_STATE_RUNNING)
 682         screen_show_desktop_popup(screen_desktop, FALSE);
 683
 684     /* ignore enter events caused by the move */
 685     ignore_start = event_start_ignore_all_enters();
 686
 687     if (moveresize_client)
 688         client_set_desktop(moveresize_client, num, TRUE, FALSE);
 689
 690     /* show windows before hiding the rest to lessen the enter/leave events */
 691
 692     /* show windows from top to bottom */
 693     for (it = stacking_list; it; it = g_list_next(it)) {
 694         if (WINDOW_IS_CLIENT(it->data)) {
 695             ObClient *c = it->data;
 696             client_show(c);
 697         }
 698     }
 699
 700     if (dofocus) screen_fallback_focus();
 701
 702     /* hide windows from bottom to top */
 703     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 704         if (WINDOW_IS_CLIENT(it->data)) {
 705             ObClient *c = it->data;
 706             if (client_hide(c) && c == focus_client) {
 707                 /* c was focused and we didn't do fallback clearly so make sure
 708                    openbox doesnt still consider the window focused.
 709                    this happens when using NextWindow with allDesktops, since
 710                    it doesnt want to move focus on desktop change, but the
 711                    focus is not going to stay with the current window, which
 712                    has now disappeared */
 713                 focus_set_client(NULL);
 714             }
 715         }
 716     }
 717
 718     event_end_ignore_all_enters(ignore_start);
 719
 720     if (event_curtime != CurrentTime)
 721         screen_desktop_user_time = event_curtime;
 722 }
 723
 724 void screen_add_desktop(gboolean current)
 725 {
 726     gulong ignore_start;
 727
 728     /* ignore enter events caused by this */
 729     ignore_start = event_start_ignore_all_enters();
 730
 731     screen_set_num_desktops(screen_num_desktops+1);
 732
 733     /* move all the clients over */
 734     if (current) {
 735         GList *it;
 736
 737         for (it = client_list; it; it = g_list_next(it)) {
 738             ObClient *c = it->data;
 739             if (c->desktop != DESKTOP_ALL && c->desktop >= screen_desktop &&
 740                 /* don't move direct children, they'll be moved with their
 741                    parent - which will have to be on the same desktop */
 742                 !client_direct_parent(c))
 743             {
 744                 ob_debug("moving window %s", c->title);
 745                 client_set_desktop(c, c->desktop+1, FALSE, TRUE);
 746             }
 747         }
 748     }
 749
 750     event_end_ignore_all_enters(ignore_start);
 751 }
 752
 753 void screen_remove_desktop(gboolean current)
 754 {
 755     guint rmdesktop, movedesktop;
 756     GList *it, *stacking_copy;
 757     gulong ignore_start;
 758
 759     if (screen_num_desktops <= 1) return;
 760
 761     /* ignore enter events caused by this */
 762     ignore_start = event_start_ignore_all_enters();
 763
 764     /* what desktop are we removing and moving to? */
 765     if (current)
 766         rmdesktop = screen_desktop;
 767     else
 768         rmdesktop = screen_num_desktops - 1;
 769     if (rmdesktop < screen_num_desktops - 1)
 770         movedesktop = rmdesktop + 1;
 771     else
 772         movedesktop = rmdesktop;
 773
 774     /* make a copy of the list cuz we're changing it */
 775     stacking_copy = g_list_copy(stacking_list);
 776     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
 777         if (WINDOW_IS_CLIENT(it->data)) {
 778             ObClient *c = it->data;
 779             guint d = c->desktop;
 780             if (d != DESKTOP_ALL && d >= movedesktop &&
 781                 /* don't move direct children, they'll be moved with their
 782                    parent - which will have to be on the same desktop */
 783                 !client_direct_parent(c))
 784             {
 785                 ob_debug("moving window %s", c->title);
 786                 client_set_desktop(c, c->desktop - 1, TRUE, TRUE);
 787             }
 788             /* raise all the windows that are on the current desktop which
 789                is being merged */
 790             if ((screen_desktop == rmdesktop - 1 ||
 791                  screen_desktop == rmdesktop) &&
 792                 (d == DESKTOP_ALL || d == screen_desktop))
 793             {
 794                 stacking_raise(CLIENT_AS_WINDOW(c));
 795                 ob_debug("raising window %s", c->title);
 796             }
 797         }
 798     }
 799     g_list_free(stacking_copy);
 800
 801     /* fallback focus like we're changing desktops */
 802     if (screen_desktop < screen_num_desktops - 1) {
 803         screen_fallback_focus();
 804         ob_debug("fake desktop change");
 805     }
 806
 807     screen_set_num_desktops(screen_num_desktops-1);
 808
 809     event_end_ignore_all_enters(ignore_start);
 810 }
 811
 812 static void get_row_col(guint d, guint *r, guint *c)
 813 {
 814     switch (screen_desktop_layout.orientation) {
 815     case OB_ORIENTATION_HORZ:
 816         switch (screen_desktop_layout.start_corner) {
 817         case OB_CORNER_TOPLEFT:
 818             *r = d / screen_desktop_layout.columns;
 819             *c = d % screen_desktop_layout.columns;
 820             break;
 821         case OB_CORNER_BOTTOMLEFT:
 822             *r = screen_desktop_layout.rows - 1 -
 823                 d / screen_desktop_layout.columns;
 824             *c = d % screen_desktop_layout.columns;
 825             break;
 826         case OB_CORNER_TOPRIGHT:
 827             *r = d / screen_desktop_layout.columns;
 828             *c = screen_desktop_layout.columns - 1 -
 829                 d % screen_desktop_layout.columns;
 830             break;
 831         case OB_CORNER_BOTTOMRIGHT:
 832             *r = screen_desktop_layout.rows - 1 -
 833                 d / screen_desktop_layout.columns;
 834             *c = screen_desktop_layout.columns - 1 -
 835                 d % screen_desktop_layout.columns;
 836             break;
 837         }
 838         break;
 839     case OB_ORIENTATION_VERT:
 840         switch (screen_desktop_layout.start_corner) {
 841         case OB_CORNER_TOPLEFT:
 842             *r = d % screen_desktop_layout.rows;
 843             *c = d / screen_desktop_layout.rows;
 844             break;
 845         case OB_CORNER_BOTTOMLEFT:
 846             *r = screen_desktop_layout.rows - 1 -
 847                 d % screen_desktop_layout.rows;
 848             *c = d / screen_desktop_layout.rows;
 849             break;
 850         case OB_CORNER_TOPRIGHT:
 851             *r = d % screen_desktop_layout.rows;
 852             *c = screen_desktop_layout.columns - 1 -
 853                 d / screen_desktop_layout.rows;
 854             break;
 855         case OB_CORNER_BOTTOMRIGHT:
 856             *r = screen_desktop_layout.rows - 1 -
 857                 d % screen_desktop_layout.rows;
 858             *c = screen_desktop_layout.columns - 1 -
 859                 d / screen_desktop_layout.rows;
 860             break;
 861         }
 862         break;
 863     }
 864 }
 865
 866 static guint translate_row_col(guint r, guint c)
 867 {
 868     switch (screen_desktop_layout.orientation) {
 869     case OB_ORIENTATION_HORZ:
 870         switch (screen_desktop_layout.start_corner) {
 871         case OB_CORNER_TOPLEFT:
 872             return r % screen_desktop_layout.rows *
 873                 screen_desktop_layout.columns +
 874                 c % screen_desktop_layout.columns;
 875         case OB_CORNER_BOTTOMLEFT:
 876             return (screen_desktop_layout.rows - 1 -
 877                     r % screen_desktop_layout.rows) *
 878                 screen_desktop_layout.columns +
 879                 c % screen_desktop_layout.columns;
 880         case OB_CORNER_TOPRIGHT:
 881             return r % screen_desktop_layout.rows *
 882                 screen_desktop_layout.columns +
 883                 (screen_desktop_layout.columns - 1 -
 884                  c % screen_desktop_layout.columns);
 885         case OB_CORNER_BOTTOMRIGHT:
 886             return (screen_desktop_layout.rows - 1 -
 887                     r % screen_desktop_layout.rows) *
 888                 screen_desktop_layout.columns +
 889                 (screen_desktop_layout.columns - 1 -
 890                  c % screen_desktop_layout.columns);
 891         }
 892     case OB_ORIENTATION_VERT:
 893         switch (screen_desktop_layout.start_corner) {
 894         case OB_CORNER_TOPLEFT:
 895             return c % screen_desktop_layout.columns *
 896                 screen_desktop_layout.rows +
 897                 r % screen_desktop_layout.rows;
 898         case OB_CORNER_BOTTOMLEFT:
 899             return c % screen_desktop_layout.columns *
 900                 screen_desktop_layout.rows +
 901                 (screen_desktop_layout.rows - 1 -
 902                  r % screen_desktop_layout.rows);
 903         case OB_CORNER_TOPRIGHT:
 904             return (screen_desktop_layout.columns - 1 -
 905                     c % screen_desktop_layout.columns) *
 906                 screen_desktop_layout.rows +
 907                 r % screen_desktop_layout.rows;
 908         case OB_CORNER_BOTTOMRIGHT:
 909             return (screen_desktop_layout.columns - 1 -
 910                     c % screen_desktop_layout.columns) *
 911                 screen_desktop_layout.rows +
 912                 (screen_desktop_layout.rows - 1 -
 913                  r % screen_desktop_layout.rows);
 914         }
 915     }
 916     g_assert_not_reached();
 917     return 0;
 918 }
 919
 920 static gboolean hide_desktop_popup_func(gpointer data)
 921 {
 922     pager_popup_hide(desktop_popup);
 923     return FALSE; /* don't repeat */
 924 }
 925
 926 void screen_show_desktop_popup(guint d, gboolean perm)
 927 {
 928     Rect *a;
 929
 930     /* 0 means don't show the popup */
 931     if (!config_desktop_popup_time) return;
 932
 933     a = screen_physical_area_primary(FALSE);
 934     pager_popup_position(desktop_popup, CenterGravity,
 935                          a->x + a->width / 2, a->y + a->height / 2);
 936     pager_popup_icon_size_multiplier(desktop_popup,
 937                                      (screen_desktop_layout.columns /
 938                                       screen_desktop_layout.rows) / 2,
 939                                      (screen_desktop_layout.rows/
 940                                       screen_desktop_layout.columns) / 2);
 941     pager_popup_max_width(desktop_popup,
 942                           MAX(a->width/3, POPUP_WIDTH));
 943     pager_popup_show(desktop_popup, screen_desktop_names[d], d);
 944
 945     obt_main_loop_timeout_remove(ob_main_loop, hide_desktop_popup_func);
 946     if (!perm && !desktop_popup_perm)
 947         /* only hide if its not already being show permanently */
 948         obt_main_loop_timeout_add(ob_main_loop,
 949                                   config_desktop_popup_time * 1000,
 950                                   hide_desktop_popup_func, desktop_popup,
 951                                   g_direct_equal, NULL);
 952
 953     g_free(a);
 954 }
 955
 956 void screen_hide_desktop_popup(void)
 957 {
 958     obt_main_loop_timeout_remove_data(ob_main_loop, hide_desktop_popup_func,
 959                                       desktop_popup, FALSE);
 960     pager_popup_hide(desktop_popup);
 961     desktop_popup_perm = FALSE;
 962 }
 963
 964 guint screen_find_desktop(guint from, ObDirection dir,
 965                           gboolean wrap, gboolean linear)
 966 {
 967     guint r, c;
 968     guint d;
 969
 970     d = from;
 971     get_row_col(d, &r, &c);
 972     if (linear) {
 973         switch (dir) {
 974         case OB_DIRECTION_EAST:
 975             if (d < screen_num_desktops - 1)
 976                 ++d;
 977             else if (wrap)
 978                 d = 0;
 979             else
 980                 return from;
 981             break;
 982         case OB_DIRECTION_WEST:
 983             if (d > 0)
 984                 --d;
 985             else if (wrap)
 986                 d = screen_num_desktops - 1;
 987             else
 988                 return from;
 989             break;
 990         default:
 991             g_assert_not_reached();
 992             return from;
 993         }
 994     } else {
 995         switch (dir) {
 996         case OB_DIRECTION_EAST:
 997             ++c;
 998             if (c >= screen_desktop_layout.columns) {
 999                 if (wrap)
1000                     c = 0;
1001                 else
1002                     return from;
1003             }
1004             d = translate_row_col(r, c);
1005             if (d >= screen_num_desktops) {
1006                 if (wrap)
1007                     ++c;
1008                 else
1009                     return from;
1010             }
1011             break;
1012         case OB_DIRECTION_WEST:
1013             --c;
1014             if (c >= screen_desktop_layout.columns) {
1015                 if (wrap)
1016                     c = screen_desktop_layout.columns - 1;
1017                 else
1018                     return from;
1019             }
1020             d = translate_row_col(r, c);
1021             if (d >= screen_num_desktops) {
1022                 if (wrap)
1023                     --c;
1024                 else
1025                     return from;
1026             }
1027             break;
1028         case OB_DIRECTION_SOUTH:
1029             ++r;
1030             if (r >= screen_desktop_layout.rows) {
1031                 if (wrap)
1032                     r = 0;
1033                 else
1034                     return from;
1035             }
1036             d = translate_row_col(r, c);
1037             if (d >= screen_num_desktops) {
1038                 if (wrap)
1039                     ++r;
1040                 else
1041                     return from;
1042             }
1043             break;
1044         case OB_DIRECTION_NORTH:
1045             --r;
1046             if (r >= screen_desktop_layout.rows) {
1047                 if (wrap)
1048                     r = screen_desktop_layout.rows - 1;
1049                 else
1050                     return from;
1051             }
1052             d = translate_row_col(r, c);
1053             if (d >= screen_num_desktops) {
1054                 if (wrap)
1055                     --r;
1056                 else
1057                     return from;
1058             }
1059             break;
1060         default:
1061             g_assert_not_reached();
1062             return from;
1063         }
1064
1065         d = translate_row_col(r, c);
1066     }
1067     return d;
1068 }
1069
1070 static gboolean screen_validate_layout(ObDesktopLayout *l)
1071 {
1072     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
1073         return FALSE;
1074
1075     /* fill in a zero rows/columns */
1076     if (l->columns == 0) {
1077         l->columns = screen_num_desktops / l->rows;
1078         if (l->rows * l->columns < screen_num_desktops)
1079             l->columns++;
1080         if (l->rows * l->columns >= screen_num_desktops + l->columns)
1081             l->rows--;
1082     } else if (l->rows == 0) {
1083         l->rows = screen_num_desktops / l->columns;
1084         if (l->columns * l->rows < screen_num_desktops)
1085             l->rows++;
1086         if (l->columns * l->rows >= screen_num_desktops + l->rows)
1087             l->columns--;
1088     }
1089
1090     /* bounds checking */
1091     if (l->orientation == OB_ORIENTATION_HORZ) {
1092         l->columns = MIN(screen_num_desktops, l->columns);
1093         l->rows = MIN(l->rows,
1094                       (screen_num_desktops + l->columns - 1) / l->columns);
1095         l->columns = screen_num_desktops / l->rows +
1096             !!(screen_num_desktops % l->rows);
1097     } else {
1098         l->rows = MIN(screen_num_desktops, l->rows);
1099         l->columns = MIN(l->columns,
1100                          (screen_num_desktops + l->rows - 1) / l->rows);
1101         l->rows = screen_num_desktops / l->columns +
1102             !!(screen_num_desktops % l->columns);
1103     }
1104     return TRUE;
1105 }
1106
1107 void screen_update_layout(void)
1108
1109 {
1110     ObDesktopLayout l;
1111     guint32 *data;
1112     guint num;
1113
1114     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
1115     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
1116     screen_desktop_layout.rows = 1;
1117     screen_desktop_layout.columns = screen_num_desktops;
1118
1119     if (OBT_PROP_GETA32(obt_root(ob_screen),
1120                         NET_DESKTOP_LAYOUT, CARDINAL, &data, &num)) {
1121         if (num == 3 || num == 4) {
1122
1123             if (data[0] == OBT_PROP_ATOM(NET_WM_ORIENTATION_VERT))
1124                 l.orientation = OB_ORIENTATION_VERT;
1125             else if (data[0] == OBT_PROP_ATOM(NET_WM_ORIENTATION_HORZ))
1126                 l.orientation = OB_ORIENTATION_HORZ;
1127             else
1128                 return;
1129
1130             if (num < 4)
1131                 l.start_corner = OB_CORNER_TOPLEFT;
1132             else {
1133                 if (data[3] == OBT_PROP_ATOM(NET_WM_TOPLEFT))
1134                     l.start_corner = OB_CORNER_TOPLEFT;
1135                 else if (data[3] == OBT_PROP_ATOM(NET_WM_TOPRIGHT))
1136                     l.start_corner = OB_CORNER_TOPRIGHT;
1137                 else if (data[3] == OBT_PROP_ATOM(NET_WM_BOTTOMRIGHT))
1138                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
1139                 else if (data[3] == OBT_PROP_ATOM(NET_WM_BOTTOMLEFT))
1140                     l.start_corner = OB_CORNER_BOTTOMLEFT;
1141                 else
1142                     return;
1143             }
1144
1145             l.columns = data[1];
1146             l.rows = data[2];
1147
1148             if (screen_validate_layout(&l))
1149                 screen_desktop_layout = l;
1150
1151             g_free(data);
1152         }
1153     }
1154 }
1155
1156 void screen_update_desktop_names(void)
1157 {
1158     guint i;
1159
1160     /* empty the array */
1161     g_strfreev(screen_desktop_names);
1162     screen_desktop_names = NULL;
1163
1164     if (OBT_PROP_GETSS(obt_root(ob_screen),
1165                        NET_DESKTOP_NAMES, utf8, &screen_desktop_names))
1166         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
1167     else
1168         i = 0;
1169     if (i < screen_num_desktops) {
1170         GSList *it;
1171
1172         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
1173                                        screen_num_desktops + 1);
1174         screen_desktop_names[screen_num_desktops] = NULL;
1175
1176         it = g_slist_nth(config_desktops_names, i);
1177
1178         for (; i < screen_num_desktops; ++i) {
1179             if (it && ((char*)it->data)[0]) /* not empty */
1180                 /* use the names from the config file when possible */
1181                 screen_desktop_names[i] = g_strdup(it->data);
1182             else
1183                 /* make up a nice name if it's not though */
1184                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
1185                                                           i + 1);
1186             if (it) it = g_slist_next(it);
1187         }
1188
1189         /* if we changed any names, then set the root property so we can
1190            all agree on the names */
1191         OBT_PROP_SETSS(obt_root(ob_screen), NET_DESKTOP_NAMES,
1192                        utf8, (const gchar**)screen_desktop_names);
1193     }
1194
1195     /* resize the pager for these names */
1196     pager_popup_text_width_to_strings(desktop_popup,
1197                                       screen_desktop_names,
1198                                       screen_num_desktops);
1199 }
1200
1201 void screen_show_desktop(gboolean show, ObClient *show_only)
1202 {
1203     GList *it;
1204
1205     if (show == screen_showing_desktop) return; /* no change */
1206
1207     screen_showing_desktop = show;
1208
1209     if (show) {
1210         /* hide windows bottom to top */
1211         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1212             if (WINDOW_IS_CLIENT(it->data)) {
1213                 ObClient *client = it->data;
1214                 client_showhide(client);
1215             }
1216         }
1217     }
1218     else {
1219         /* restore windows top to bottom */
1220         for (it = stacking_list; it; it = g_list_next(it)) {
1221             if (WINDOW_IS_CLIENT(it->data)) {
1222                 ObClient *client = it->data;
1223                 if (client_should_show(client)) {
1224                     if (!show_only || client == show_only)
1225                         client_show(client);
1226                     else
1227                         client_iconify(client, TRUE, FALSE, TRUE);
1228                 }
1229             }
1230         }
1231     }
1232
1233     if (show) {
1234         /* focus the desktop */
1235         for (it = focus_order; it; it = g_list_next(it)) {
1236             ObClient *c = it->data;
1237             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1238                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1239                 client_focus(it->data))
1240                 break;
1241         }
1242     }
1243     else if (!show_only) {
1244         ObClient *c;
1245
1246         if ((c = focus_fallback(TRUE, FALSE, TRUE, FALSE))) {
1247             /* only do the flicker reducing stuff ahead of time if we are going
1248                to call xsetinputfocus on the window ourselves. otherwise there
1249                is no guarantee the window will actually take focus.. */
1250             if (c->can_focus) {
1251                 /* reduce flicker by hiliting now rather than waiting for the
1252                    server FocusIn event */
1253                 frame_adjust_focus(c->frame, TRUE);
1254             }
1255         }
1256     }
1257
1258     show = !!show; /* make it boolean */
1259     OBT_PROP_SET32(obt_root(ob_screen), NET_SHOWING_DESKTOP, CARDINAL, show);
1260 }
1261
1262 void screen_install_colormap(ObClient *client, gboolean install)
1263 {
1264     if (client == NULL || client->colormap == None) {
1265         if (install)
1266             XInstallColormap(obt_display, RrColormap(ob_rr_inst));
1267         else
1268             XUninstallColormap(obt_display, RrColormap(ob_rr_inst));
1269     } else {
1270         obt_display_ignore_errors(TRUE);
1271         if (install)
1272             XInstallColormap(obt_display, client->colormap);
1273         else
1274             XUninstallColormap(obt_display, client->colormap);
1275         obt_display_ignore_errors(FALSE);
1276     }
1277 }
1278
1279 typedef struct {
1280     guint desktop;
1281     StrutPartial *strut;
1282 } ObScreenStrut;
1283
1284 #define RESET_STRUT_LIST(sl) \
1285     (g_slist_free(sl), sl = NULL)
1286
1287 #define ADD_STRUT_TO_LIST(sl, d, s) \
1288 { \
1289     ObScreenStrut *ss = g_new(ObScreenStrut, 1); \
1290     ss->desktop = d; \
1291     ss->strut = s;  \
1292     sl = g_slist_prepend(sl, ss); \
1293 }
1294
1295 #define VALIDATE_STRUTS(sl, side, max) \
1296 { \
1297     GSList *it; \
1298     for (it = sl; it; it = g_slist_next(it)) { \
1299       ObScreenStrut *ss = it->data; \
1300       ss->strut->side = MIN(max, ss->strut->side); \
1301     } \
1302 }
1303
1304 static void get_xinerama_screens(Rect **xin_areas, guint *nxin)
1305 {
1306     guint i;
1307     gint n, l, r, t, b;
1308 #ifdef XINERAMA
1309     XineramaScreenInfo *info;
1310 #endif
1311
1312     if (ob_debug_xinerama) {
1313         gint w = WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen));
1314         gint h = HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen));
1315         *nxin = 2;
1316         *xin_areas = g_new(Rect, *nxin + 1);
1317         RECT_SET((*xin_areas)[0], 0, 0, w/2, h);
1318         RECT_SET((*xin_areas)[1], w/2, 0, w-(w/2), h);
1319     }
1320 #ifdef XINERAMA
1321     else if (obt_display_extension_xinerama &&
1322              (info = XineramaQueryScreens(obt_display, &n))) {
1323         *nxin = n;
1324         *xin_areas = g_new(Rect, *nxin + 1);
1325         for (i = 0; i < *nxin; ++i)
1326             RECT_SET((*xin_areas)[i], info[i].x_org, info[i].y_org,
1327                      info[i].width, info[i].height);
1328         XFree(info);
1329     }
1330 #endif
1331     else {
1332         *nxin = 1;
1333         *xin_areas = g_new(Rect, *nxin + 1);
1334         RECT_SET((*xin_areas)[0], 0, 0,
1335                  WidthOfScreen(ScreenOfDisplay(obt_display, ob_screen)),
1336                  HeightOfScreen(ScreenOfDisplay(obt_display, ob_screen)));
1337     }
1338
1339     /* returns one extra with the total area in it */
1340     l = (*xin_areas)[0].x;
1341     t = (*xin_areas)[0].y;
1342     r = (*xin_areas)[0].x + (*xin_areas)[0].width - 1;
1343     b = (*xin_areas)[0].y + (*xin_areas)[0].height - 1;
1344     for (i = 1; i < *nxin; ++i) {
1345         l = MIN(l, (*xin_areas)[i].x);
1346         t = MIN(l, (*xin_areas)[i].y);
1347         r = MAX(r, (*xin_areas)[i].x + (*xin_areas)[i].width - 1);
1348         b = MAX(b, (*xin_areas)[i].y + (*xin_areas)[i].height - 1);
1349     }
1350     RECT_SET((*xin_areas)[*nxin], l, t, r - l + 1, b - t + 1);
1351 }
1352
1353 void screen_update_areas(void)
1354 {
1355     guint i;
1356     gulong *dims;
1357     GList *it;
1358
1359     g_free(monitor_area);
1360     get_xinerama_screens(&monitor_area, &screen_num_monitors);
1361
1362     /* set up the user-specified margins */
1363     config_margins.top_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1364     config_margins.top_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1365     config_margins.bottom_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1366     config_margins.bottom_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1367     config_margins.left_start = RECT_TOP(monitor_area[screen_num_monitors]);
1368     config_margins.left_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1369     config_margins.right_start = RECT_TOP(monitor_area[screen_num_monitors]);
1370     config_margins.right_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1371
1372     RESET_STRUT_LIST(struts_left);
1373     RESET_STRUT_LIST(struts_top);
1374     RESET_STRUT_LIST(struts_right);
1375     RESET_STRUT_LIST(struts_bottom);
1376
1377     /* collect the struts */
1378     for (it = client_list; it; it = g_list_next(it)) {
1379         ObClient *c = it->data;
1380         if (c->strut.left)
1381             ADD_STRUT_TO_LIST(struts_left, c->desktop, &c->strut);
1382         if (c->strut.top)
1383             ADD_STRUT_TO_LIST(struts_top, c->desktop, &c->strut);
1384         if (c->strut.right)
1385             ADD_STRUT_TO_LIST(struts_right, c->desktop, &c->strut);
1386         if (c->strut.bottom)
1387             ADD_STRUT_TO_LIST(struts_bottom, c->desktop, &c->strut);
1388     }
1389     if (dock_strut.left)
1390         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &dock_strut);
1391     if (dock_strut.top)
1392         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &dock_strut);
1393     if (dock_strut.right)
1394         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &dock_strut);
1395     if (dock_strut.bottom)
1396         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &dock_strut);
1397
1398     if (config_margins.left)
1399         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &config_margins);
1400     if (config_margins.top)
1401         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &config_margins);
1402     if (config_margins.right)
1403         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &config_margins);
1404     if (config_margins.bottom)
1405         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &config_margins);
1406
1407     VALIDATE_STRUTS(struts_left, left,
1408                     monitor_area[screen_num_monitors].width / 2);
1409     VALIDATE_STRUTS(struts_right, right,
1410                     monitor_area[screen_num_monitors].width / 2);
1411     VALIDATE_STRUTS(struts_top, top,
1412                     monitor_area[screen_num_monitors].height / 2);
1413     VALIDATE_STRUTS(struts_bottom, bottom,
1414                     monitor_area[screen_num_monitors].height / 2);
1415
1416     dims = g_new(gulong, 4 * screen_num_desktops);
1417     for (i = 0; i < screen_num_desktops; ++i) {
1418         Rect *area = screen_area(i, SCREEN_AREA_ALL_MONITORS, NULL);
1419         dims[i*4+0] = area->x;
1420         dims[i*4+1] = area->y;
1421         dims[i*4+2] = area->width;
1422         dims[i*4+3] = area->height;
1423         g_free(area);
1424     }
1425
1426     /* set the legacy workarea hint to the union of all the monitors */
1427     OBT_PROP_SETA32(obt_root(ob_screen), NET_WORKAREA, CARDINAL,
1428                     dims, 4 * screen_num_desktops);
1429
1430     /* the area has changed, adjust all the windows if they need it */
1431     for (it = client_list; it; it = g_list_next(it))
1432         client_reconfigure(it->data, FALSE);
1433
1434     g_free(dims);
1435 }
1436
1437 #if 0
1438 Rect* screen_area_all_monitors(guint desktop)
1439 {
1440     guint i;
1441     Rect *a;
1442
1443     a = screen_area_monitor(desktop, 0);
1444
1445     /* combine all the monitors together */
1446     for (i = 1; i < screen_num_monitors; ++i) {
1447         Rect *m = screen_area_monitor(desktop, i);
1448         gint l, r, t, b;
1449
1450         l = MIN(RECT_LEFT(*a), RECT_LEFT(*m));
1451         t = MIN(RECT_TOP(*a), RECT_TOP(*m));
1452         r = MAX(RECT_RIGHT(*a), RECT_RIGHT(*m));
1453         b = MAX(RECT_BOTTOM(*a), RECT_BOTTOM(*m));
1454
1455         RECT_SET(*a, l, t, r - l + 1, b - t + 1);
1456
1457         g_free(m);
1458     }
1459
1460     return a;
1461 }
1462 #endif
1463
1464 #define STRUT_LEFT_IN_SEARCH(s, search) \
1465     (RANGES_INTERSECT(search->y, search->height, \
1466                       s->left_start, s->left_end - s->left_start + 1))
1467 #define STRUT_RIGHT_IN_SEARCH(s, search) \
1468     (RANGES_INTERSECT(search->y, search->height, \
1469                       s->right_start, s->right_end - s->right_start + 1))
1470 #define STRUT_TOP_IN_SEARCH(s, search) \
1471     (RANGES_INTERSECT(search->x, search->width, \
1472                       s->top_start, s->top_end - s->top_start + 1))
1473 #define STRUT_BOTTOM_IN_SEARCH(s, search) \
1474     (RANGES_INTERSECT(search->x, search->width, \
1475                       s->bottom_start, s->bottom_end - s->bottom_start + 1))
1476
1477 #define STRUT_LEFT_IGNORE(s, us, search) \
1478     (head == SCREEN_AREA_ALL_MONITORS && us && \
1479      RECT_LEFT(monitor_area[i]) + s->left > RECT_LEFT(*search))
1480 #define STRUT_RIGHT_IGNORE(s, us, search) \
1481     (head == SCREEN_AREA_ALL_MONITORS && us && \
1482      RECT_RIGHT(monitor_area[i]) - s->right < RECT_RIGHT(*search))
1483 #define STRUT_TOP_IGNORE(s, us, search) \
1484     (head == SCREEN_AREA_ALL_MONITORS && us && \
1485      RECT_TOP(monitor_area[i]) + s->top > RECT_TOP(*search))
1486 #define STRUT_BOTTOM_IGNORE(s, us, search) \
1487     (head == SCREEN_AREA_ALL_MONITORS && us && \
1488      RECT_BOTTOM(monitor_area[i]) - s->bottom < RECT_BOTTOM(*search))
1489
1490 Rect* screen_area(guint desktop, guint head, Rect *search)
1491 {
1492     Rect *a;
1493     GSList *it;
1494     gint l, r, t, b;
1495     guint i, d;
1496     gboolean us = search != NULL; /* user provided search */
1497
1498     g_assert(desktop < screen_num_desktops || desktop == DESKTOP_ALL);
1499     g_assert(head < screen_num_monitors || head == SCREEN_AREA_ONE_MONITOR ||
1500              head == SCREEN_AREA_ALL_MONITORS);
1501     g_assert(!(head == SCREEN_AREA_ONE_MONITOR && search == NULL));
1502
1503     /* find any struts for this monitor
1504        which will be affecting the search area.
1505     */
1506
1507     /* search everything if search is null */
1508     if (!search) {
1509         if (head < screen_num_monitors) search = &monitor_area[head];
1510         else search = &monitor_area[screen_num_monitors];
1511     }
1512     if (head == SCREEN_AREA_ONE_MONITOR) head = screen_find_monitor(search);
1513
1514     /* al is "all left" meaning the furthest left you can get, l is our
1515        "working left" meaning our current strut edge which we're calculating
1516     */
1517
1518     /* only include monitors which the search area lines up with */
1519     if (RECT_INTERSECTS_RECT(monitor_area[screen_num_monitors], *search)) {
1520         l = RECT_RIGHT(monitor_area[screen_num_monitors]);
1521         t = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1522         r = RECT_LEFT(monitor_area[screen_num_monitors]);
1523         b = RECT_TOP(monitor_area[screen_num_monitors]);
1524         for (i = 0; i < screen_num_monitors; ++i) {
1525             /* add the monitor if applicable */
1526             if (RANGES_INTERSECT(search->x, search->width,
1527                                  monitor_area[i].x, monitor_area[i].width))
1528             {
1529                 t = MIN(t, RECT_TOP(monitor_area[i]));
1530                 b = MAX(b, RECT_BOTTOM(monitor_area[i]));
1531             }
1532             if (RANGES_INTERSECT(search->y, search->height,
1533                                  monitor_area[i].y, monitor_area[i].height))
1534             {
1535                 l = MIN(l, RECT_LEFT(monitor_area[i]));
1536                 r = MAX(r, RECT_RIGHT(monitor_area[i]));
1537             }
1538         }
1539     } else {
1540         l = RECT_LEFT(monitor_area[screen_num_monitors]);
1541         t = RECT_TOP(monitor_area[screen_num_monitors]);
1542         r = RECT_RIGHT(monitor_area[screen_num_monitors]);
1543         b = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1544     }
1545
1546     for (d = 0; d < screen_num_desktops; ++d) {
1547         if (d != desktop && desktop != DESKTOP_ALL) continue;
1548
1549         for (i = 0; i < screen_num_monitors; ++i) {
1550             if (head != SCREEN_AREA_ALL_MONITORS && head != i) continue;
1551
1552             for (it = struts_left; it; it = g_slist_next(it)) {
1553                 ObScreenStrut *s = it->data;
1554                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1555                     STRUT_LEFT_IN_SEARCH(s->strut, search) &&
1556                     !STRUT_LEFT_IGNORE(s->strut, us, search))
1557                     l = MAX(l, RECT_LEFT(monitor_area[screen_num_monitors])
1558                                + s->strut->left);
1559             }
1560             for (it = struts_top; it; it = g_slist_next(it)) {
1561                 ObScreenStrut *s = it->data;
1562                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1563                     STRUT_TOP_IN_SEARCH(s->strut, search) &&
1564                     !STRUT_TOP_IGNORE(s->strut, us, search))
1565                     t = MAX(t, RECT_TOP(monitor_area[screen_num_monitors])
1566                                + s->strut->top);
1567             }
1568             for (it = struts_right; it; it = g_slist_next(it)) {
1569                 ObScreenStrut *s = it->data;
1570                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1571                     STRUT_RIGHT_IN_SEARCH(s->strut, search) &&
1572                     !STRUT_RIGHT_IGNORE(s->strut, us, search))
1573                     r = MIN(r, RECT_RIGHT(monitor_area[screen_num_monitors])
1574                                - s->strut->right);
1575             }
1576             for (it = struts_bottom; it; it = g_slist_next(it)) {
1577                 ObScreenStrut *s = it->data;
1578                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1579                     STRUT_BOTTOM_IN_SEARCH(s->strut, search) &&
1580                     !STRUT_BOTTOM_IGNORE(s->strut, us, search))
1581                     b = MIN(b, RECT_BOTTOM(monitor_area[screen_num_monitors])
1582                                - s->strut->bottom);
1583             }
1584
1585             /* limit to this monitor */
1586             if (head == i) {
1587                 l = MAX(l, RECT_LEFT(monitor_area[i]));
1588                 t = MAX(t, RECT_TOP(monitor_area[i]));
1589                 r = MIN(r, RECT_RIGHT(monitor_area[i]));
1590                 b = MIN(b, RECT_BOTTOM(monitor_area[i]));
1591             }
1592         }
1593     }
1594
1595     a = g_new(Rect, 1);
1596     a->x = l;
1597     a->y = t;
1598     a->width = r - l + 1;
1599     a->height = b - t + 1;
1600     return a;
1601 }
1602
1603 guint screen_find_monitor(Rect *search)
1604 {
1605     guint i;
1606     guint most = screen_num_monitors;
1607     guint mostv = 0;
1608
1609     for (i = 0; i < screen_num_monitors; ++i) {
1610         Rect *area = screen_physical_area_monitor(i);
1611         if (RECT_INTERSECTS_RECT(*area, *search)) {
1612             Rect r;
1613             guint v;
1614
1615             RECT_SET_INTERSECTION(r, *area, *search);
1616             v = r.width * r.height;
1617
1618             if (v > mostv) {
1619                 mostv = v;
1620                 most = i;
1621             }
1622         }
1623         g_free(area);
1624     }
1625     return most;
1626 }
1627
1628 Rect* screen_physical_area_all_monitors(void)
1629 {
1630     return screen_physical_area_monitor(screen_num_monitors);
1631 }
1632
1633 Rect* screen_physical_area_monitor(guint head)
1634 {
1635     Rect *a;
1636     g_assert(head <= screen_num_monitors);
1637
1638     a = g_new(Rect, 1);
1639     *a = monitor_area[head];
1640     return a;
1641 }
1642
1643 gboolean screen_physical_area_monitor_contains(guint head, Rect *search)
1644 {
1645     g_assert(head <= screen_num_monitors);
1646     g_assert(search);
1647     return RECT_INTERSECTS_RECT(monitor_area[head], *search);
1648 }
1649
1650 guint screen_monitor_active(void)
1651 {
1652     if (moveresize_client)
1653         return client_monitor(moveresize_client);
1654     else if (focus_client)
1655         return client_monitor(focus_client);
1656     else
1657         return screen_monitor_pointer();
1658 }
1659
1660 Rect* screen_physical_area_active(void)
1661 {
1662     return screen_physical_area_monitor(screen_monitor_active());
1663 }
1664
1665 guint screen_monitor_primary(gboolean fixed)
1666 {
1667     if (config_primary_monitor_index > 0) {
1668         if (config_primary_monitor_index-1 < screen_num_monitors)
1669             return config_primary_monitor_index - 1;
1670         else
1671             return 0;
1672     }
1673     else if (fixed)
1674         return 0;
1675     else if (config_primary_monitor == OB_PLACE_MONITOR_ACTIVE)
1676         return screen_monitor_active();
1677     else /* config_primary_monitor == OB_PLACE_MONITOR_MOUSE */
1678         return screen_monitor_pointer();
1679 }
1680
1681 Rect *screen_physical_area_primary(gboolean fixed)
1682 {
1683     return screen_physical_area_monitor(screen_monitor_primary(fixed));
1684 }
1685
1686 void screen_set_root_cursor(void)
1687 {
1688     if (sn_app_starting())
1689         XDefineCursor(obt_display, obt_root(ob_screen),
1690                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1691     else
1692         XDefineCursor(obt_display, obt_root(ob_screen),
1693                       ob_cursor(OB_CURSOR_POINTER));
1694 }
1695
1696 guint screen_find_monitor_point(guint x, guint y)
1697 {
1698     Rect mon;
1699     RECT_SET(mon, x, y, 1, 1);
1700     return screen_find_monitor(&mon);
1701 }
1702
1703 guint screen_monitor_pointer()
1704 {
1705     gint x, y;
1706     if (!screen_pointer_pos(&x, &y))
1707         x = y = 0;
1708     return screen_find_monitor_point(x, y);
1709 }
1710
1711 gboolean screen_pointer_pos(gint *x, gint *y)
1712 {
1713     Window w;
1714     gint i;
1715     guint u;
1716     gboolean ret;
1717
1718     ret = !!XQueryPointer(obt_display, obt_root(ob_screen),
1719                           &w, &w, x, y, &i, &i, &u);
1720     if (!ret) {
1721         for (i = 0; i < ScreenCount(obt_display); ++i)
1722             if (i != ob_screen)
1723                 if (XQueryPointer(obt_display, obt_root(i),
1724                                   &w, &w, x, y, &i, &i, &u))
1725                     break;
1726     }
1727     return ret;
1728 }