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 "xerror.h"
  24 #include "prop.h"
  25 #include "grab.h"
  26 #include "startupnotify.h"
  27 #include "moveresize.h"
  28 #include "config.h"
  29 #include "screen.h"
  30 #include "client.h"
  31 #include "session.h"
  32 #include "frame.h"
  33 #include "event.h"
  34 #include "focus.h"
  35 #include "popup.h"
  36 #include "extensions.h"
  37 #include "render/render.h"
  38 #include "gettext.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 | ButtonMotionMask)
  52
  53 guint    screen_num_desktops;
  54 guint    screen_num_monitors;
  55 guint    screen_desktop;
  56 guint    screen_last_desktop;
  57 Size     screen_physical_size;
  58 gboolean screen_showing_desktop;
  59 ObDesktopLayout screen_desktop_layout;
  60 gchar  **screen_desktop_names;
  61 Window   screen_support_win;
  62 Time     screen_desktop_user_time = CurrentTime;
  63
  64 static Rect  **area; /* array of desktop holding array of xinerama areas */
  65 static Rect  *monitor_area;
  66
  67 static ObPagerPopup *desktop_cycle_popup;
  68
  69 static gboolean replace_wm()
  70 {
  71     gchar *wm_sn;
  72     Atom wm_sn_atom;
  73     Window current_wm_sn_owner;
  74     Time timestamp;
  75
  76     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  77     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  78     g_free(wm_sn);
  79
  80     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  81     if (current_wm_sn_owner == screen_support_win)
  82         current_wm_sn_owner = None;
  83     if (current_wm_sn_owner) {
  84         if (!ob_replace_wm) {
  85             g_message(_("A window manager is already running on screen %d"),
  86                       ob_screen);
  87             return FALSE;
  88         }
  89         xerror_set_ignore(TRUE);
  90         xerror_occured = FALSE;
  91
  92         /* We want to find out when the current selection owner dies */
  93         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  94         XSync(ob_display, FALSE);
  95
  96         xerror_set_ignore(FALSE);
  97         if (xerror_occured)
  98             current_wm_sn_owner = None;
  99     }
 100
 101     {
 102         /* Generate a timestamp */
 103         XEvent event;
 104
 105         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 106
 107         XChangeProperty(ob_display, screen_support_win,
 108                         prop_atoms.wm_class, prop_atoms.string,
 109                         8, PropModeAppend, NULL, 0);
 110         XWindowEvent(ob_display, screen_support_win,
 111                      PropertyChangeMask, &event);
 112
 113         XSelectInput(ob_display, screen_support_win, NoEventMask);
 114
 115         timestamp = event.xproperty.time;
 116     }
 117
 118     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 119                        timestamp);
 120
 121     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 122         g_message(_("Could not acquire window manager selection on screen %d"),
 123                   ob_screen);
 124         return FALSE;
 125     }
 126
 127     /* Wait for old window manager to go away */
 128     if (current_wm_sn_owner) {
 129       XEvent event;
 130       gulong wait = 0;
 131       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 132
 133       while (wait < timeout) {
 134           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 135                                 StructureNotifyMask, &event) &&
 136               event.type == DestroyNotify)
 137               break;
 138           g_usleep(G_USEC_PER_SEC / 10);
 139           wait += G_USEC_PER_SEC / 10;
 140       }
 141
 142       if (wait >= timeout) {
 143           g_message(_("The WM on screen %d is not exiting"), ob_screen);
 144           return FALSE;
 145       }
 146     }
 147
 148     /* Send client message indicating that we are now the WM */
 149     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 150                  timestamp, wm_sn_atom, screen_support_win, 0,
 151                  SubstructureNotifyMask);
 152
 153     return TRUE;
 154 }
 155
 156 gboolean screen_annex()
 157 {
 158     XSetWindowAttributes attrib;
 159     pid_t pid;
 160     gint i, num_support;
 161     Atom *prop_atoms_start, *wm_supported_pos;
 162     gulong *supported;
 163
 164     /* create the netwm support window */
 165     attrib.override_redirect = TRUE;
 166     screen_support_win = XCreateWindow(ob_display,
 167                                        RootWindow(ob_display, ob_screen),
 168                                        -100, -100, 1, 1, 0,
 169                                        CopyFromParent, InputOutput,
 170                                        CopyFromParent,
 171                                        CWOverrideRedirect, &attrib);
 172     XMapWindow(ob_display, screen_support_win);
 173     XLowerWindow(ob_display, screen_support_win);
 174
 175     if (!replace_wm()) {
 176         XDestroyWindow(ob_display, screen_support_win);
 177         return FALSE;
 178     }
 179
 180     xerror_set_ignore(TRUE);
 181     xerror_occured = FALSE;
 182     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 183                  ROOT_EVENTMASK);
 184     xerror_set_ignore(FALSE);
 185     if (xerror_occured) {
 186         g_message(_("A window manager is already running on screen %d"),
 187                   ob_screen);
 188
 189         XDestroyWindow(ob_display, screen_support_win);
 190         return FALSE;
 191     }
 192
 193     screen_set_root_cursor();
 194
 195     /* set the OPENBOX_PID hint */
 196     pid = getpid();
 197     PROP_SET32(RootWindow(ob_display, ob_screen),
 198                openbox_pid, cardinal, pid);
 199
 200     /* set supporting window */
 201     PROP_SET32(RootWindow(ob_display, ob_screen),
 202                net_supporting_wm_check, window, screen_support_win);
 203
 204     /* set properties on the supporting window */
 205     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 206     PROP_SET32(screen_support_win, net_supporting_wm_check,
 207                window, screen_support_win);
 208
 209     /* set the _NET_SUPPORTED_ATOMS hint */
 210
 211     /* this is all the atoms after net_supported in the prop_atoms struct */
 212     prop_atoms_start = (Atom*)&prop_atoms;
 213     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
 214     num_support = sizeof(prop_atoms) / sizeof(Atom) -
 215         (wm_supported_pos - prop_atoms_start) - 1;
 216     i = 0;
 217     supported = g_new(gulong, num_support);
 218     supported[i++] = prop_atoms.net_supporting_wm_check;
 219     supported[i++] = prop_atoms.net_wm_full_placement;
 220     supported[i++] = prop_atoms.net_current_desktop;
 221     supported[i++] = prop_atoms.net_number_of_desktops;
 222     supported[i++] = prop_atoms.net_desktop_geometry;
 223     supported[i++] = prop_atoms.net_desktop_viewport;
 224     supported[i++] = prop_atoms.net_active_window;
 225     supported[i++] = prop_atoms.net_workarea;
 226     supported[i++] = prop_atoms.net_client_list;
 227     supported[i++] = prop_atoms.net_client_list_stacking;
 228     supported[i++] = prop_atoms.net_desktop_names;
 229     supported[i++] = prop_atoms.net_close_window;
 230     supported[i++] = prop_atoms.net_desktop_layout;
 231     supported[i++] = prop_atoms.net_showing_desktop;
 232     supported[i++] = prop_atoms.net_wm_name;
 233     supported[i++] = prop_atoms.net_wm_visible_name;
 234     supported[i++] = prop_atoms.net_wm_icon_name;
 235     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 236     supported[i++] = prop_atoms.net_wm_desktop;
 237     supported[i++] = prop_atoms.net_wm_strut;
 238     supported[i++] = prop_atoms.net_wm_strut_partial;
 239     supported[i++] = prop_atoms.net_wm_icon;
 240     supported[i++] = prop_atoms.net_wm_icon_geometry;
 241     supported[i++] = prop_atoms.net_wm_window_type;
 242     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 243     supported[i++] = prop_atoms.net_wm_window_type_dock;
 244     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 245     supported[i++] = prop_atoms.net_wm_window_type_menu;
 246     supported[i++] = prop_atoms.net_wm_window_type_utility;
 247     supported[i++] = prop_atoms.net_wm_window_type_splash;
 248     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 249     supported[i++] = prop_atoms.net_wm_window_type_normal;
 250     supported[i++] = prop_atoms.net_wm_allowed_actions;
 251     supported[i++] = prop_atoms.net_wm_action_move;
 252     supported[i++] = prop_atoms.net_wm_action_resize;
 253     supported[i++] = prop_atoms.net_wm_action_minimize;
 254     supported[i++] = prop_atoms.net_wm_action_shade;
 255     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 256     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 257     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 258     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 259     supported[i++] = prop_atoms.net_wm_action_close;
 260     supported[i++] = prop_atoms.net_wm_action_above;
 261     supported[i++] = prop_atoms.net_wm_action_below;
 262     supported[i++] = prop_atoms.net_wm_state;
 263     supported[i++] = prop_atoms.net_wm_state_modal;
 264     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 265     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 266     supported[i++] = prop_atoms.net_wm_state_shaded;
 267     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 268     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 269     supported[i++] = prop_atoms.net_wm_state_hidden;
 270     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 271     supported[i++] = prop_atoms.net_wm_state_above;
 272     supported[i++] = prop_atoms.net_wm_state_below;
 273     supported[i++] = prop_atoms.net_wm_state_demands_attention;
 274     supported[i++] = prop_atoms.net_moveresize_window;
 275     supported[i++] = prop_atoms.net_wm_moveresize;
 276     supported[i++] = prop_atoms.net_wm_user_time;
 277     supported[i++] = prop_atoms.net_wm_user_time_window;
 278     supported[i++] = prop_atoms.net_frame_extents;
 279     supported[i++] = prop_atoms.net_request_frame_extents;
 280     supported[i++] = prop_atoms.net_restack_window;
 281     supported[i++] = prop_atoms.net_startup_id;
 282 #ifdef SYNC
 283     supported[i++] = prop_atoms.net_wm_sync_request;
 284     supported[i++] = prop_atoms.net_wm_sync_request_counter;
 285 #endif
 286
 287     supported[i++] = prop_atoms.kde_wm_change_state;
 288     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
 289     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
 290
 291     supported[i++] = prop_atoms.ob_wm_action_undecorate;
 292     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 293     supported[i++] = prop_atoms.openbox_pid;
 294     supported[i++] = prop_atoms.ob_config;
 295     supported[i++] = prop_atoms.ob_control;
 296     g_assert(i == num_support);
 297
 298     PROP_SETA32(RootWindow(ob_display, ob_screen),
 299                 net_supported, atom, supported, num_support);
 300     g_free(supported);
 301
 302     return TRUE;
 303 }
 304
 305 void screen_startup(gboolean reconfig)
 306 {
 307     gchar **names = NULL;
 308     guint32 d;
 309     gboolean namesexist = FALSE;
 310
 311     desktop_cycle_popup = pager_popup_new(FALSE);
 312     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
 313
 314     if (reconfig) {
 315         /* update the pager popup's width */
 316         pager_popup_text_width_to_strings(desktop_cycle_popup,
 317                                           screen_desktop_names,
 318                                           screen_num_desktops);
 319         return;
 320     }
 321
 322     /* get the initial size */
 323     screen_resize();
 324
 325     /* have names already been set for the desktops? */
 326     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 327                    net_desktop_names, utf8, &names))
 328     {
 329         g_strfreev(names);
 330         namesexist = TRUE;
 331     }
 332
 333     /* if names don't exist and we have session names, set those.
 334        do this stuff BEFORE setting the number of desktops, because that
 335        will create default names for them
 336     */
 337     if (!namesexist && session_desktop_names != NULL) {
 338         guint i, numnames;
 339         GSList *it;
 340
 341         /* get the desktop names */
 342         numnames = g_slist_length(session_desktop_names);
 343         names = g_new(gchar*, numnames + 1);
 344         names[numnames] = NULL;
 345         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
 346             names[i] = g_strdup(it->data);
 347
 348         /* set the root window property */
 349         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
 350
 351         g_strfreev(names);
 352     }
 353
 354     /* set the number of desktops, if it's not already set.
 355
 356        this will also set the default names from the config file up for
 357        desktops that don't have names yet */
 358     screen_num_desktops = 0;
 359     if (PROP_GET32(RootWindow(ob_display, ob_screen),
 360                    net_number_of_desktops, cardinal, &d))
 361         screen_set_num_desktops(d);
 362     /* restore from session if possible */
 363     else if (session_num_desktops)
 364         screen_set_num_desktops(session_num_desktops);
 365     else
 366         screen_set_num_desktops(config_desktops_num);
 367
 368     /* start on the current desktop when a wm was already running */
 369     if (PROP_GET32(RootWindow(ob_display, ob_screen),
 370                    net_current_desktop, cardinal, &d) &&
 371         d < screen_num_desktops)
 372     {
 373         screen_set_desktop(d, FALSE);
 374     } else if (session_desktop >= 0)
 375         screen_set_desktop(MIN((guint)session_desktop,
 376                                screen_num_desktops), FALSE);
 377     else
 378         screen_set_desktop(MIN(config_screen_firstdesk,
 379                                screen_num_desktops) - 1, FALSE);
 380
 381     /* don't start in showing-desktop mode */
 382     screen_showing_desktop = FALSE;
 383     PROP_SET32(RootWindow(ob_display, ob_screen),
 384                net_showing_desktop, cardinal, screen_showing_desktop);
 385
 386     if (session_desktop_layout_present)
 387         screen_desktop_layout = session_desktop_layout;
 388     else
 389         screen_update_layout();
 390 }
 391
 392 void screen_shutdown(gboolean reconfig)
 393 {
 394     Rect **r;
 395
 396     pager_popup_free(desktop_cycle_popup);
 397
 398     if (reconfig)
 399         return;
 400
 401     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 402                  NoEventMask);
 403
 404     /* we're not running here no more! */
 405     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 406     /* not without us */
 407     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 408     /* don't keep this mode */
 409     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 410
 411     XDestroyWindow(ob_display, screen_support_win);
 412
 413     g_strfreev(screen_desktop_names);
 414     screen_desktop_names = NULL;
 415
 416     for (r = area; *r; ++r)
 417         g_free(*r);
 418     g_free(area);
 419     area = NULL;
 420 }
 421
 422 void screen_resize()
 423 {
 424     static gint oldw = 0, oldh = 0;
 425     gint w, h;
 426     GList *it;
 427     gulong geometry[2];
 428
 429     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 430     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 431
 432     if (w == oldw && h == oldh) return;
 433
 434     oldw = w; oldh = h;
 435
 436     /* Set the _NET_DESKTOP_GEOMETRY hint */
 437     screen_physical_size.width = geometry[0] = w;
 438     screen_physical_size.height = geometry[1] = h;
 439     PROP_SETA32(RootWindow(ob_display, ob_screen),
 440                 net_desktop_geometry, cardinal, geometry, 2);
 441
 442     if (ob_state() == OB_STATE_STARTING)
 443         return;
 444
 445     screen_update_areas();
 446     dock_configure();
 447
 448     for (it = client_list; it; it = g_list_next(it))
 449         client_move_onscreen(it->data, FALSE);
 450 }
 451
 452 void screen_set_num_desktops(guint num)
 453 {
 454     guint old;
 455     gulong *viewport;
 456     GList *it;
 457
 458     g_assert(num > 0);
 459
 460     if (screen_num_desktops == num) return;
 461
 462     old = screen_num_desktops;
 463     screen_num_desktops = num;
 464     PROP_SET32(RootWindow(ob_display, ob_screen),
 465                net_number_of_desktops, cardinal, num);
 466
 467     /* set the viewport hint */
 468     viewport = g_new0(gulong, num * 2);
 469     PROP_SETA32(RootWindow(ob_display, ob_screen),
 470                 net_desktop_viewport, cardinal, viewport, num * 2);
 471     g_free(viewport);
 472
 473     /* the number of rows/columns will differ */
 474     screen_update_layout();
 475
 476     /* move windows on desktops that will no longer exist! */
 477     for (it = client_list; it; it = g_list_next(it)) {
 478         ObClient *c = it->data;
 479         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 480             client_set_desktop(c, num - 1, FALSE);
 481     }
 482
 483     /* change our struts/area to match (after moving windows) */
 484     screen_update_areas();
 485
 486     /* may be some unnamed desktops that we need to fill in with names
 487      (after updating the areas so the popup can resize) */
 488     screen_update_desktop_names();
 489
 490     /* change our desktop if we're on one that no longer exists! */
 491     if (screen_desktop >= screen_num_desktops)
 492         screen_set_desktop(num - 1, TRUE);
 493 }
 494
 495 void screen_set_desktop(guint num, gboolean dofocus)
 496 {
 497     ObClient *c;
 498     GList *it;
 499     guint old;
 500
 501     g_assert(num < screen_num_desktops);
 502
 503     old = screen_desktop;
 504     screen_desktop = num;
 505     PROP_SET32(RootWindow(ob_display, ob_screen),
 506                net_current_desktop, cardinal, num);
 507
 508     if (old == num) return;
 509
 510     screen_last_desktop = old;
 511
 512     ob_debug("Moving to desktop %d\n", num+1);
 513
 514     if (moveresize_client)
 515         client_set_desktop(moveresize_client, num, TRUE);
 516
 517     /* show windows before hiding the rest to lessen the enter/leave events */
 518
 519     /* show windows from top to bottom */
 520     for (it = stacking_list; it; it = g_list_next(it)) {
 521         if (WINDOW_IS_CLIENT(it->data)) {
 522             ObClient *c = it->data;
 523             client_show(c);
 524         }
 525     }
 526
 527     /* have to try focus here because when you leave an empty desktop
 528        there is no focus out to watch for
 529
 530        do this before hiding the windows so if helper windows are coming
 531        with us, they don't get hidden
 532     */
 533     if (dofocus && (c = focus_fallback(TRUE))) {
 534         /* only do the flicker reducing stuff ahead of time if we are going
 535            to call xsetinputfocus on the window ourselves. otherwise there is
 536            no guarantee the window will actually take focus.. */
 537         if (c->can_focus) {
 538             /* reduce flicker by hiliting now rather than waiting for the
 539                server FocusIn event */
 540             frame_adjust_focus(c->frame, TRUE);
 541             /* do this here so that if you switch desktops to a window with
 542                helper windows then the helper windows won't flash */
 543             client_bring_helper_windows(c);
 544         }
 545     }
 546
 547     /* hide windows from bottom to top */
 548     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 549         if (WINDOW_IS_CLIENT(it->data)) {
 550             ObClient *c = it->data;
 551             client_hide(c);
 552         }
 553     }
 554
 555     event_ignore_all_queued_enters();
 556
 557     if (event_curtime != CurrentTime)
 558         screen_desktop_user_time = event_curtime;
 559 }
 560
 561 static void get_row_col(guint d, guint *r, guint *c)
 562 {
 563     switch (screen_desktop_layout.orientation) {
 564     case OB_ORIENTATION_HORZ:
 565         switch (screen_desktop_layout.start_corner) {
 566         case OB_CORNER_TOPLEFT:
 567             *r = d / screen_desktop_layout.columns;
 568             *c = d % screen_desktop_layout.columns;
 569             break;
 570         case OB_CORNER_BOTTOMLEFT:
 571             *r = screen_desktop_layout.rows - 1 -
 572                 d / screen_desktop_layout.columns;
 573             *c = d % screen_desktop_layout.columns;
 574             break;
 575         case OB_CORNER_TOPRIGHT:
 576             *r = d / screen_desktop_layout.columns;
 577             *c = screen_desktop_layout.columns - 1 -
 578                 d % screen_desktop_layout.columns;
 579             break;
 580         case OB_CORNER_BOTTOMRIGHT:
 581             *r = screen_desktop_layout.rows - 1 -
 582                 d / screen_desktop_layout.columns;
 583             *c = screen_desktop_layout.columns - 1 -
 584                 d % screen_desktop_layout.columns;
 585             break;
 586         }
 587         break;
 588     case OB_ORIENTATION_VERT:
 589         switch (screen_desktop_layout.start_corner) {
 590         case OB_CORNER_TOPLEFT:
 591             *r = d % screen_desktop_layout.rows;
 592             *c = d / screen_desktop_layout.rows;
 593             break;
 594         case OB_CORNER_BOTTOMLEFT:
 595             *r = screen_desktop_layout.rows - 1 -
 596                 d % screen_desktop_layout.rows;
 597             *c = d / screen_desktop_layout.rows;
 598             break;
 599         case OB_CORNER_TOPRIGHT:
 600             *r = d % screen_desktop_layout.rows;
 601             *c = screen_desktop_layout.columns - 1 -
 602                 d / screen_desktop_layout.rows;
 603             break;
 604         case OB_CORNER_BOTTOMRIGHT:
 605             *r = screen_desktop_layout.rows - 1 -
 606                 d % screen_desktop_layout.rows;
 607             *c = screen_desktop_layout.columns - 1 -
 608                 d / screen_desktop_layout.rows;
 609             break;
 610         }
 611         break;
 612     }
 613 }
 614
 615 static guint translate_row_col(guint r, guint c)
 616 {
 617     switch (screen_desktop_layout.orientation) {
 618     case OB_ORIENTATION_HORZ:
 619         switch (screen_desktop_layout.start_corner) {
 620         case OB_CORNER_TOPLEFT:
 621             return r % screen_desktop_layout.rows *
 622                 screen_desktop_layout.columns +
 623                 c % screen_desktop_layout.columns;
 624         case OB_CORNER_BOTTOMLEFT:
 625             return (screen_desktop_layout.rows - 1 -
 626                     r % screen_desktop_layout.rows) *
 627                 screen_desktop_layout.columns +
 628                 c % screen_desktop_layout.columns;
 629         case OB_CORNER_TOPRIGHT:
 630             return r % screen_desktop_layout.rows *
 631                 screen_desktop_layout.columns +
 632                 (screen_desktop_layout.columns - 1 -
 633                  c % screen_desktop_layout.columns);
 634         case OB_CORNER_BOTTOMRIGHT:
 635             return (screen_desktop_layout.rows - 1 -
 636                     r % screen_desktop_layout.rows) *
 637                 screen_desktop_layout.columns +
 638                 (screen_desktop_layout.columns - 1 -
 639                  c % screen_desktop_layout.columns);
 640         }
 641     case OB_ORIENTATION_VERT:
 642         switch (screen_desktop_layout.start_corner) {
 643         case OB_CORNER_TOPLEFT:
 644             return c % screen_desktop_layout.columns *
 645                 screen_desktop_layout.rows +
 646                 r % screen_desktop_layout.rows;
 647         case OB_CORNER_BOTTOMLEFT:
 648             return c % screen_desktop_layout.columns *
 649                 screen_desktop_layout.rows +
 650                 (screen_desktop_layout.rows - 1 -
 651                  r % screen_desktop_layout.rows);
 652         case OB_CORNER_TOPRIGHT:
 653             return (screen_desktop_layout.columns - 1 -
 654                     c % screen_desktop_layout.columns) *
 655                 screen_desktop_layout.rows +
 656                 r % screen_desktop_layout.rows;
 657         case OB_CORNER_BOTTOMRIGHT:
 658             return (screen_desktop_layout.columns - 1 -
 659                     c % screen_desktop_layout.columns) *
 660                 screen_desktop_layout.rows +
 661                 (screen_desktop_layout.rows - 1 -
 662                  r % screen_desktop_layout.rows);
 663         }
 664     }
 665     g_assert_not_reached();
 666     return 0;
 667 }
 668
 669 void screen_desktop_popup(guint d, gboolean show)
 670 {
 671     Rect *a;
 672
 673     if (!show) {
 674         pager_popup_hide(desktop_cycle_popup);
 675     } else {
 676         a = screen_physical_area_monitor(0);
 677         pager_popup_position(desktop_cycle_popup, CenterGravity,
 678                              a->x + a->width / 2, a->y + a->height / 2);
 679         pager_popup_icon_size_multiplier(desktop_cycle_popup,
 680                                          (screen_desktop_layout.columns /
 681                                           screen_desktop_layout.rows) / 2,
 682                                          (screen_desktop_layout.rows/
 683                                           screen_desktop_layout.columns) / 2);
 684         pager_popup_max_width(desktop_cycle_popup,
 685                               MAX(a->width/3, POPUP_WIDTH));
 686         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 687     }
 688 }
 689
 690 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 691                            gboolean dialog, gboolean done, gboolean cancel)
 692 {
 693     guint r, c;
 694     static guint d = (guint)-1;
 695     guint ret, oldd;
 696
 697     if (d == (guint)-1)
 698         d = screen_desktop;
 699
 700     if ((cancel || done) && dialog)
 701         goto show_cycle_dialog;
 702
 703     oldd = d;
 704     get_row_col(d, &r, &c);
 705
 706     if (linear) {
 707         switch (dir) {
 708         case OB_DIRECTION_EAST:
 709             if (d < screen_num_desktops - 1)
 710                 ++d;
 711             else if (wrap)
 712                 d = 0;
 713             break;
 714         case OB_DIRECTION_WEST:
 715             if (d > 0)
 716                 --d;
 717             else if (wrap)
 718                 d = screen_num_desktops - 1;
 719             break;
 720         default:
 721             assert(0);
 722             return screen_desktop;
 723         }
 724     } else {
 725         switch (dir) {
 726         case OB_DIRECTION_EAST:
 727             ++c;
 728             if (c >= screen_desktop_layout.columns) {
 729                 if (wrap)
 730                     c = 0;
 731                 else
 732                     goto show_cycle_dialog;
 733             }
 734             d = translate_row_col(r, c);
 735             if (d >= screen_num_desktops) {
 736                 if (wrap) {
 737                     ++c;
 738                 } else {
 739                     d = oldd;
 740                     goto show_cycle_dialog;
 741                 }
 742             }
 743             break;
 744         case OB_DIRECTION_WEST:
 745             --c;
 746             if (c >= screen_desktop_layout.columns) {
 747                 if (wrap)
 748                     c = screen_desktop_layout.columns - 1;
 749                 else
 750                     goto show_cycle_dialog;
 751             }
 752             d = translate_row_col(r, c);
 753             if (d >= screen_num_desktops) {
 754                 if (wrap) {
 755                     --c;
 756                 } else {
 757                     d = oldd;
 758                     goto show_cycle_dialog;
 759                 }
 760             }
 761             break;
 762         case OB_DIRECTION_SOUTH:
 763             ++r;
 764             if (r >= screen_desktop_layout.rows) {
 765                 if (wrap)
 766                     r = 0;
 767                 else
 768                     goto show_cycle_dialog;
 769             }
 770             d = translate_row_col(r, c);
 771             if (d >= screen_num_desktops) {
 772                 if (wrap) {
 773                     ++r;
 774                 } else {
 775                     d = oldd;
 776                     goto show_cycle_dialog;
 777                 }
 778             }
 779             break;
 780         case OB_DIRECTION_NORTH:
 781             --r;
 782             if (r >= screen_desktop_layout.rows) {
 783                 if (wrap)
 784                     r = screen_desktop_layout.rows - 1;
 785                 else
 786                     goto show_cycle_dialog;
 787             }
 788             d = translate_row_col(r, c);
 789             if (d >= screen_num_desktops) {
 790                 if (wrap) {
 791                     --r;
 792                 } else {
 793                     d = oldd;
 794                     goto show_cycle_dialog;
 795                 }
 796             }
 797             break;
 798         default:
 799             assert(0);
 800             return d = screen_desktop;
 801         }
 802
 803         d = translate_row_col(r, c);
 804     }
 805
 806 show_cycle_dialog:
 807     if (dialog && !cancel && !done) {
 808         screen_desktop_popup(d, TRUE);
 809     } else
 810         screen_desktop_popup(0, FALSE);
 811     ret = d;
 812
 813     if (!dialog || cancel || done)
 814         d = (guint)-1;
 815
 816     return ret;
 817 }
 818
 819 void screen_update_layout()
 820 {
 821     ObOrientation orient;
 822     ObCorner corner;
 823     guint rows;
 824     guint cols;
 825     guint32 *data;
 826     guint num;
 827     gboolean valid = FALSE;
 828
 829     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 830                     net_desktop_layout, cardinal, &data, &num)) {
 831         if (num == 3 || num == 4) {
 832
 833             if (data[0] == prop_atoms.net_wm_orientation_vert)
 834                 orient = OB_ORIENTATION_VERT;
 835             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 836                 orient = OB_ORIENTATION_HORZ;
 837             else
 838                 goto screen_update_layout_bail;
 839
 840             if (num < 4)
 841                 corner = OB_CORNER_TOPLEFT;
 842             else {
 843                 if (data[3] == prop_atoms.net_wm_topleft)
 844                     corner = OB_CORNER_TOPLEFT;
 845                 else if (data[3] == prop_atoms.net_wm_topright)
 846                     corner = OB_CORNER_TOPRIGHT;
 847                 else if (data[3] == prop_atoms.net_wm_bottomright)
 848                     corner = OB_CORNER_BOTTOMRIGHT;
 849                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 850                     corner = OB_CORNER_BOTTOMLEFT;
 851                 else
 852                     goto screen_update_layout_bail;
 853             }
 854
 855             cols = data[1];
 856             rows = data[2];
 857
 858             /* fill in a zero rows/columns */
 859             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 860                 goto screen_update_layout_bail;
 861             } else {
 862                 if (cols == 0) {
 863                     cols = screen_num_desktops / rows;
 864                     if (rows * cols < screen_num_desktops)
 865                         cols++;
 866                     if (rows * cols >= screen_num_desktops + cols)
 867                         rows--;
 868                 } else if (rows == 0) {
 869                     rows = screen_num_desktops / cols;
 870                     if (cols * rows < screen_num_desktops)
 871                         rows++;
 872                     if (cols * rows >= screen_num_desktops + rows)
 873                         cols--;
 874                 }
 875             }
 876
 877             /* bounds checking */
 878             if (orient == OB_ORIENTATION_HORZ) {
 879                 cols = MIN(screen_num_desktops, cols);
 880                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 881                 cols = screen_num_desktops / rows +
 882                     !!(screen_num_desktops % rows);
 883             } else {
 884                 rows = MIN(screen_num_desktops, rows);
 885                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 886                 rows = screen_num_desktops / cols +
 887                     !!(screen_num_desktops % cols);
 888             }
 889
 890             valid = TRUE;
 891         }
 892     screen_update_layout_bail:
 893         g_free(data);
 894     }
 895
 896     if (!valid) {
 897         /* defaults */
 898         orient = OB_ORIENTATION_HORZ;
 899         corner = OB_CORNER_TOPLEFT;
 900         rows = 1;
 901         cols = screen_num_desktops;
 902     }
 903
 904     screen_desktop_layout.orientation = orient;
 905     screen_desktop_layout.start_corner = corner;
 906     screen_desktop_layout.rows = rows;
 907     screen_desktop_layout.columns = cols;
 908 }
 909
 910 void screen_update_desktop_names()
 911 {
 912     guint i;
 913
 914     /* empty the array */
 915     g_strfreev(screen_desktop_names);
 916     screen_desktop_names = NULL;
 917
 918     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 919                    net_desktop_names, utf8, &screen_desktop_names))
 920         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
 921     else
 922         i = 0;
 923     if (i < screen_num_desktops) {
 924         GSList *it;
 925
 926         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 927                                        screen_num_desktops + 1);
 928         screen_desktop_names[screen_num_desktops] = NULL;
 929
 930         it = g_slist_nth(config_desktops_names, i);
 931
 932         for (; i < screen_num_desktops; ++i) {
 933             if (it)
 934                 /* use the names from the config file when possible */
 935                 screen_desktop_names[i] = g_strdup(it->data);
 936             else
 937                 /* make up a nice name if it's not though */
 938                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
 939                                                           i + 1);
 940             if (it) it = g_slist_next(it);
 941         }
 942
 943         /* if we changed any names, then set the root property so we can
 944            all agree on the names */
 945         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,
 946                    screen_desktop_names);
 947     }
 948
 949     /* resize the pager for these names */
 950     pager_popup_text_width_to_strings(desktop_cycle_popup,
 951                                       screen_desktop_names,
 952                                       screen_num_desktops);
 953 }
 954
 955 void screen_show_desktop(gboolean show, ObClient *show_only)
 956 {
 957     GList *it;
 958
 959     if (show == screen_showing_desktop) return; /* no change */
 960
 961     screen_showing_desktop = show;
 962
 963     if (show) {
 964         /* hide windows bottom to top */
 965         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 966             if (WINDOW_IS_CLIENT(it->data)) {
 967                 ObClient *client = it->data;
 968                 client_showhide(client);
 969             }
 970         }
 971     }
 972     else {
 973         /* restore windows top to bottom */
 974         for (it = stacking_list; it; it = g_list_next(it)) {
 975             if (WINDOW_IS_CLIENT(it->data)) {
 976                 ObClient *client = it->data;
 977                 if (client_should_show(client)) {
 978                     if (!show_only || client == show_only)
 979                         client_show(client);
 980                     else
 981                         client_iconify(client, TRUE, FALSE, TRUE);
 982                 }
 983             }
 984         }
 985     }
 986
 987     if (show) {
 988         /* focus the desktop */
 989         for (it = focus_order; it; it = g_list_next(it)) {
 990             ObClient *c = it->data;
 991             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 992                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 993                 client_focus(it->data))
 994                 break;
 995         }
 996     }
 997     else if (!show_only) {
 998         ObClient *c;
 999
1000         if ((c = focus_fallback(TRUE))) {
1001             /* only do the flicker reducing stuff ahead of time if we are going
1002                to call xsetinputfocus on the window ourselves. otherwise there
1003                is no guarantee the window will actually take focus.. */
1004             if (c->can_focus) {
1005                 /* reduce flicker by hiliting now rather than waiting for the
1006                    server FocusIn event */
1007                 frame_adjust_focus(c->frame, TRUE);
1008             }
1009         }
1010     }
1011
1012     show = !!show; /* make it boolean */
1013     PROP_SET32(RootWindow(ob_display, ob_screen),
1014                net_showing_desktop, cardinal, show);
1015 }
1016
1017 void screen_install_colormap(ObClient *client, gboolean install)
1018 {
1019     if (client == NULL) {
1020         if (install)
1021             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1022         else
1023             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1024     } else {
1025         xerror_set_ignore(TRUE);
1026         if (install) {
1027             if (client->colormap != None)
1028                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1029         } else
1030             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1031         xerror_set_ignore(FALSE);
1032     }
1033 }
1034
1035 static inline void
1036 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
1037                            gint edge, Strut *ret)
1038 {
1039     if (s->left &&
1040         ((s->left_end <= s->left_start) ||
1041          (RECT_TOP(*monitor_area) < s->left_end &&
1042           RECT_BOTTOM(*monitor_area) > s->left_start)))
1043         ret->left = MAX(ret->left, edge);
1044 }
1045
1046 static inline void
1047 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
1048                           gint edge, Strut *ret)
1049 {
1050     if (s->top &&
1051         ((s->top_end <= s->top_start) ||
1052          (RECT_LEFT(*monitor_area) < s->top_end &&
1053           RECT_RIGHT(*monitor_area) > s->top_start)))
1054         ret->top = MAX(ret->top, edge);
1055 }
1056
1057 static inline void
1058 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
1059                             gint edge, Strut *ret)
1060 {
1061     if (s->right &&
1062         ((s->right_end <= s->right_start) ||
1063          (RECT_TOP(*monitor_area) < s->right_end &&
1064           RECT_BOTTOM(*monitor_area) > s->right_start)))
1065         ret->right = MAX(ret->right, edge);
1066 }
1067
1068 static inline void
1069 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
1070                              gint edge, Strut *ret)
1071 {
1072     if (s->bottom &&
1073         ((s->bottom_end <= s->bottom_start) ||
1074          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1075           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1076         ret->bottom = MAX(ret->bottom, edge);
1077 }
1078
1079 void screen_update_areas()
1080 {
1081     guint i, x;
1082     gulong *dims;
1083     GList *it;
1084     gint o;
1085
1086     g_free(monitor_area);
1087     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1088
1089     if (area) {
1090         for (i = 0; area[i]; ++i)
1091             g_free(area[i]);
1092         g_free(area);
1093     }
1094
1095     area = g_new(Rect*, screen_num_desktops + 2);
1096     for (i = 0; i < screen_num_desktops + 1; ++i)
1097         area[i] = g_new0(Rect, screen_num_monitors + 1);
1098     area[i] = NULL;
1099
1100     dims = g_new(gulong, 4 * screen_num_desktops);
1101
1102     for (i = 0; i < screen_num_desktops + 1; ++i) {
1103         Strut *struts;
1104         gint l, r, t, b;
1105
1106         struts = g_new0(Strut, screen_num_monitors);
1107
1108         /* calc the xinerama areas */
1109         for (x = 0; x < screen_num_monitors; ++x) {
1110             area[i][x] = monitor_area[x];
1111             if (x == 0) {
1112                 l = monitor_area[x].x;
1113                 t = monitor_area[x].y;
1114                 r = monitor_area[x].x + monitor_area[x].width - 1;
1115                 b = monitor_area[x].y + monitor_area[x].height - 1;
1116             } else {
1117                 l = MIN(l, monitor_area[x].x);
1118                 t = MIN(t, monitor_area[x].y);
1119                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1120                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1121             }
1122         }
1123         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1124
1125         /* apply the struts */
1126
1127         /* find the left-most xin heads, i do this in 2 loops :| */
1128         o = area[i][0].x;
1129         for (x = 1; x < screen_num_monitors; ++x)
1130             o = MIN(o, area[i][x].x);
1131
1132         for (x = 0; x < screen_num_monitors; ++x) {
1133             for (it = client_list; it; it = g_list_next(it)) {
1134                 ObClient *c = it->data;
1135                 screen_area_add_strut_left(&c->strut,
1136                                            &monitor_area[x],
1137                                            o + c->strut.left - area[i][x].x,
1138                                            &struts[x]);
1139             }
1140             screen_area_add_strut_left(&dock_strut,
1141                                        &monitor_area[x],
1142                                        o + dock_strut.left - area[i][x].x,
1143                                        &struts[x]);
1144
1145             area[i][x].x += struts[x].left;
1146             area[i][x].width -= struts[x].left;
1147         }
1148
1149         /* find the top-most xin heads, i do this in 2 loops :| */
1150         o = area[i][0].y;
1151         for (x = 1; x < screen_num_monitors; ++x)
1152             o = MIN(o, area[i][x].y);
1153
1154         for (x = 0; x < screen_num_monitors; ++x) {
1155             for (it = client_list; it; it = g_list_next(it)) {
1156                 ObClient *c = it->data;
1157                 screen_area_add_strut_top(&c->strut,
1158                                            &monitor_area[x],
1159                                            o + c->strut.top - area[i][x].y,
1160                                            &struts[x]);
1161             }
1162             screen_area_add_strut_top(&dock_strut,
1163                                       &monitor_area[x],
1164                                       o + dock_strut.top - area[i][x].y,
1165                                       &struts[x]);
1166
1167             area[i][x].y += struts[x].top;
1168             area[i][x].height -= struts[x].top;
1169         }
1170
1171         /* find the right-most xin heads, i do this in 2 loops :| */
1172         o = area[i][0].x + area[i][0].width - 1;
1173         for (x = 1; x < screen_num_monitors; ++x)
1174             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1175
1176         for (x = 0; x < screen_num_monitors; ++x) {
1177             for (it = client_list; it; it = g_list_next(it)) {
1178                 ObClient *c = it->data;
1179                 screen_area_add_strut_right(&c->strut,
1180                                            &monitor_area[x],
1181                                            (area[i][x].x +
1182                                             area[i][x].width - 1) -
1183                                             (o - c->strut.right),
1184                                             &struts[x]);
1185             }
1186             screen_area_add_strut_right(&dock_strut,
1187                                         &monitor_area[x],
1188                                         (area[i][x].x +
1189                                          area[i][x].width - 1) -
1190                                         (o - dock_strut.right),
1191                                         &struts[x]);
1192
1193             area[i][x].width -= struts[x].right;
1194         }
1195
1196         /* find the bottom-most xin heads, i do this in 2 loops :| */
1197         o = area[i][0].y + area[i][0].height - 1;
1198         for (x = 1; x < screen_num_monitors; ++x)
1199             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1200
1201         for (x = 0; x < screen_num_monitors; ++x) {
1202             for (it = client_list; it; it = g_list_next(it)) {
1203                 ObClient *c = it->data;
1204                 screen_area_add_strut_bottom(&c->strut,
1205                                              &monitor_area[x],
1206                                              (area[i][x].y +
1207                                               area[i][x].height - 1) - \
1208                                              (o - c->strut.bottom),
1209                                              &struts[x]);
1210             }
1211             screen_area_add_strut_bottom(&dock_strut,
1212                                          &monitor_area[x],
1213                                          (area[i][x].y +
1214                                           area[i][x].height - 1) - \
1215                                          (o - dock_strut.bottom),
1216                                          &struts[x]);
1217
1218             area[i][x].height -= struts[x].bottom;
1219         }
1220
1221         l = RECT_LEFT(area[i][0]);
1222         t = RECT_TOP(area[i][0]);
1223         r = RECT_RIGHT(area[i][0]);
1224         b = RECT_BOTTOM(area[i][0]);
1225         for (x = 1; x < screen_num_monitors; ++x) {
1226             l = MIN(l, RECT_LEFT(area[i][x]));
1227             t = MIN(l, RECT_TOP(area[i][x]));
1228             r = MAX(r, RECT_RIGHT(area[i][x]));
1229             b = MAX(b, RECT_BOTTOM(area[i][x]));
1230         }
1231         RECT_SET(area[i][screen_num_monitors], l, t,
1232                  r - l + 1, b - t + 1);
1233
1234         /* XXX optimize when this is run? */
1235
1236         /* the area has changed, adjust all the maximized
1237            windows */
1238         for (it = client_list; it; it = g_list_next(it)) {
1239             ObClient *c = it->data;
1240             if (i < screen_num_desktops) {
1241                 if (c->desktop == i)
1242                     client_reconfigure(c);
1243             } else if (c->desktop == DESKTOP_ALL)
1244                 client_reconfigure(c);
1245         }
1246         if (i < screen_num_desktops) {
1247             /* don't set these for the 'all desktops' area */
1248             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1249             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1250             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1251             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1252         }
1253
1254         g_free(struts);
1255     }
1256
1257     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1258                 dims, 4 * screen_num_desktops);
1259
1260     g_free(dims);
1261 }
1262
1263 Rect *screen_area(guint desktop)
1264 {
1265     return screen_area_monitor(desktop, screen_num_monitors);
1266 }
1267
1268 Rect *screen_area_monitor(guint desktop, guint head)
1269 {
1270     if (head > screen_num_monitors)
1271         return NULL;
1272     if (desktop >= screen_num_desktops) {
1273         if (desktop == DESKTOP_ALL)
1274             return &area[screen_num_desktops][head];
1275         return NULL;
1276     }
1277     return &area[desktop][head];
1278 }
1279
1280 guint screen_find_monitor(Rect *search)
1281 {
1282     guint i;
1283     guint most = 0;
1284     guint mostv = 0;
1285
1286     for (i = 0; i < screen_num_monitors; ++i) {
1287         Rect *area = screen_physical_area_monitor(i);
1288         if (RECT_INTERSECTS_RECT(*area, *search)) {
1289             Rect r;
1290             guint v;
1291
1292             RECT_SET_INTERSECTION(r, *area, *search);
1293             v = r.width * r.height;
1294
1295             if (v > mostv) {
1296                 mostv = v;
1297                 most = i;
1298             }
1299         }
1300     }
1301     return most;
1302 }
1303
1304 Rect *screen_physical_area()
1305 {
1306     return screen_physical_area_monitor(screen_num_monitors);
1307 }
1308
1309 Rect *screen_physical_area_monitor(guint head)
1310 {
1311     if (head > screen_num_monitors)
1312         return NULL;
1313     return &monitor_area[head];
1314 }
1315
1316 void screen_set_root_cursor()
1317 {
1318     if (sn_app_starting())
1319         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1320                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1321     else
1322         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1323                       ob_cursor(OB_CURSOR_POINTER));
1324 }
1325
1326 gboolean screen_pointer_pos(gint *x, gint *y)
1327 {
1328     Window w;
1329     gint i;
1330     guint u;
1331     gboolean ret;
1332
1333     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1334                           &w, &w, x, y, &i, &i, &u);
1335     if (!ret) {
1336         for (i = 0; i < ScreenCount(ob_display); ++i)
1337             if (i != ob_screen)
1338                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1339                                   &w, &w, x, y, &i, &i, &u))
1340                     break;
1341     }
1342     return ret;
1343 }