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 DesktopLayout 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     guint i, numnames;
 308     gchar **names;
 309     GSList *it;
 310     guint32 d;
 311
 312     desktop_cycle_popup = pager_popup_new(FALSE);
 313     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
 314
 315     if (reconfig) {
 316         /* update the pager popup's width */
 317         pager_popup_text_width_to_strings(desktop_cycle_popup,
 318                                           screen_desktop_names,
 319                                           screen_num_desktops);
 320         return;
 321     }
 322
 323     /* get the initial size */
 324     screen_resize();
 325
 326     /* get the desktop names */
 327     numnames = g_slist_length(config_desktops_names);
 328     names = g_new(gchar*, numnames + 1);
 329     names[numnames] = NULL;
 330     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
 331         names[i] = g_strdup(it->data);
 332
 333     /* set the root window property */
 334     PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
 335
 336     g_strfreev(names);
 337
 338     /* set the number of desktops */
 339     screen_num_desktops = 0;
 340     screen_set_num_desktops(config_desktops_num);
 341
 342     /* start on the current desktop when a wm was already running */
 343     if (PROP_GET32(RootWindow(ob_display, ob_screen),
 344                    net_current_desktop, cardinal, &d) &&
 345         d < screen_num_desktops)
 346     {
 347         screen_set_desktop(d, FALSE);
 348     } else if (session_desktop >= 0)
 349         screen_set_desktop(MIN((guint)session_desktop,
 350                                screen_num_desktops), FALSE);
 351     else
 352         screen_set_desktop(MIN(config_screen_firstdesk,
 353                                screen_num_desktops) - 1, FALSE);
 354
 355     /* don't start in showing-desktop mode */
 356     screen_showing_desktop = FALSE;
 357     PROP_SET32(RootWindow(ob_display, ob_screen),
 358                net_showing_desktop, cardinal, screen_showing_desktop);
 359
 360     screen_update_layout();
 361 }
 362
 363 void screen_shutdown(gboolean reconfig)
 364 {
 365     Rect **r;
 366
 367     pager_popup_free(desktop_cycle_popup);
 368
 369     if (reconfig)
 370         return;
 371
 372     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 373                  NoEventMask);
 374
 375     /* we're not running here no more! */
 376     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 377     /* not without us */
 378     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 379     /* don't keep this mode */
 380     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 381
 382     XDestroyWindow(ob_display, screen_support_win);
 383
 384     g_strfreev(screen_desktop_names);
 385     screen_desktop_names = NULL;
 386
 387     for (r = area; *r; ++r)
 388         g_free(*r);
 389     g_free(area);
 390     area = NULL;
 391 }
 392
 393 void screen_resize()
 394 {
 395     static gint oldw = 0, oldh = 0;
 396     gint w, h;
 397     GList *it;
 398     gulong geometry[2];
 399
 400     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 401     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 402
 403     if (w == oldw && h == oldh) return;
 404
 405     oldw = w; oldh = h;
 406
 407     /* Set the _NET_DESKTOP_GEOMETRY hint */
 408     screen_physical_size.width = geometry[0] = w;
 409     screen_physical_size.height = geometry[1] = h;
 410     PROP_SETA32(RootWindow(ob_display, ob_screen),
 411                 net_desktop_geometry, cardinal, geometry, 2);
 412
 413     if (ob_state() == OB_STATE_STARTING)
 414         return;
 415
 416     screen_update_areas();
 417     dock_configure();
 418
 419     for (it = client_list; it; it = g_list_next(it))
 420         client_move_onscreen(it->data, FALSE);
 421 }
 422
 423 void screen_set_num_desktops(guint num)
 424 {
 425     guint old;
 426     gulong *viewport;
 427     GList *it;
 428
 429     g_assert(num > 0);
 430
 431     if (screen_num_desktops == num) return;
 432
 433     old = screen_num_desktops;
 434     screen_num_desktops = num;
 435     PROP_SET32(RootWindow(ob_display, ob_screen),
 436                net_number_of_desktops, cardinal, num);
 437
 438     /* set the viewport hint */
 439     viewport = g_new0(gulong, num * 2);
 440     PROP_SETA32(RootWindow(ob_display, ob_screen),
 441                 net_desktop_viewport, cardinal, viewport, num * 2);
 442     g_free(viewport);
 443
 444     /* the number of rows/columns will differ */
 445     screen_update_layout();
 446
 447     /* move windows on desktops that will no longer exist! */
 448     for (it = client_list; it; it = g_list_next(it)) {
 449         ObClient *c = it->data;
 450         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 451             client_set_desktop(c, num - 1, FALSE);
 452     }
 453
 454     /* change our struts/area to match (after moving windows) */
 455     screen_update_areas();
 456
 457     /* may be some unnamed desktops that we need to fill in with names
 458      (after updating the areas so the popup can resize) */
 459     screen_update_desktop_names();
 460
 461     /* change our desktop if we're on one that no longer exists! */
 462     if (screen_desktop >= screen_num_desktops)
 463         screen_set_desktop(num - 1, TRUE);
 464 }
 465
 466 void screen_set_desktop(guint num, gboolean dofocus)
 467 {
 468     ObClient *c;
 469     GList *it;
 470     guint old;
 471
 472     g_assert(num < screen_num_desktops);
 473
 474     old = screen_desktop;
 475     screen_desktop = num;
 476     PROP_SET32(RootWindow(ob_display, ob_screen),
 477                net_current_desktop, cardinal, num);
 478
 479     if (old == num) return;
 480
 481     screen_last_desktop = old;
 482
 483     ob_debug("Moving to desktop %d\n", num+1);
 484
 485     if (moveresize_client)
 486         client_set_desktop(moveresize_client, num, TRUE);
 487
 488     /* show windows before hiding the rest to lessen the enter/leave events */
 489
 490     /* show windows from top to bottom */
 491     for (it = stacking_list; it; it = g_list_next(it)) {
 492         if (WINDOW_IS_CLIENT(it->data)) {
 493             ObClient *c = it->data;
 494             client_show(c);
 495         }
 496     }
 497
 498     /* have to try focus here because when you leave an empty desktop
 499        there is no focus out to watch for
 500
 501        do this before hiding the windows so if helper windows are coming
 502        with us, they don't get hidden
 503     */
 504     if (dofocus && (c = focus_fallback(TRUE))) {
 505         /* only do the flicker reducing stuff ahead of time if we are going
 506            to call xsetinputfocus on the window ourselves. otherwise there is
 507            no guarantee the window will actually take focus.. */
 508         if (c->can_focus) {
 509             /* reduce flicker by hiliting now rather than waiting for the
 510                server FocusIn event */
 511             frame_adjust_focus(c->frame, TRUE);
 512             /* do this here so that if you switch desktops to a window with
 513                helper windows then the helper windows won't flash */
 514             client_bring_helper_windows(c);
 515         }
 516     }
 517
 518     /* hide windows from bottom to top */
 519     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 520         if (WINDOW_IS_CLIENT(it->data)) {
 521             ObClient *c = it->data;
 522             client_hide(c);
 523         }
 524     }
 525
 526     event_ignore_all_queued_enters();
 527
 528     if (event_curtime != CurrentTime)
 529         screen_desktop_user_time = event_curtime;
 530 }
 531
 532 static void get_row_col(guint d, guint *r, guint *c)
 533 {
 534     switch (screen_desktop_layout.orientation) {
 535     case OB_ORIENTATION_HORZ:
 536         switch (screen_desktop_layout.start_corner) {
 537         case OB_CORNER_TOPLEFT:
 538             *r = d / screen_desktop_layout.columns;
 539             *c = d % screen_desktop_layout.columns;
 540             break;
 541         case OB_CORNER_BOTTOMLEFT:
 542             *r = screen_desktop_layout.rows - 1 -
 543                 d / screen_desktop_layout.columns;
 544             *c = d % screen_desktop_layout.columns;
 545             break;
 546         case OB_CORNER_TOPRIGHT:
 547             *r = d / screen_desktop_layout.columns;
 548             *c = screen_desktop_layout.columns - 1 -
 549                 d % screen_desktop_layout.columns;
 550             break;
 551         case OB_CORNER_BOTTOMRIGHT:
 552             *r = screen_desktop_layout.rows - 1 -
 553                 d / screen_desktop_layout.columns;
 554             *c = screen_desktop_layout.columns - 1 -
 555                 d % screen_desktop_layout.columns;
 556             break;
 557         }
 558         break;
 559     case OB_ORIENTATION_VERT:
 560         switch (screen_desktop_layout.start_corner) {
 561         case OB_CORNER_TOPLEFT:
 562             *r = d % screen_desktop_layout.rows;
 563             *c = d / screen_desktop_layout.rows;
 564             break;
 565         case OB_CORNER_BOTTOMLEFT:
 566             *r = screen_desktop_layout.rows - 1 -
 567                 d % screen_desktop_layout.rows;
 568             *c = d / screen_desktop_layout.rows;
 569             break;
 570         case OB_CORNER_TOPRIGHT:
 571             *r = d % screen_desktop_layout.rows;
 572             *c = screen_desktop_layout.columns - 1 -
 573                 d / screen_desktop_layout.rows;
 574             break;
 575         case OB_CORNER_BOTTOMRIGHT:
 576             *r = screen_desktop_layout.rows - 1 -
 577                 d % screen_desktop_layout.rows;
 578             *c = screen_desktop_layout.columns - 1 -
 579                 d / screen_desktop_layout.rows;
 580             break;
 581         }
 582         break;
 583     }
 584 }
 585
 586 static guint translate_row_col(guint r, guint c)
 587 {
 588     switch (screen_desktop_layout.orientation) {
 589     case OB_ORIENTATION_HORZ:
 590         switch (screen_desktop_layout.start_corner) {
 591         case OB_CORNER_TOPLEFT:
 592             return r % screen_desktop_layout.rows *
 593                 screen_desktop_layout.columns +
 594                 c % screen_desktop_layout.columns;
 595         case OB_CORNER_BOTTOMLEFT:
 596             return (screen_desktop_layout.rows - 1 -
 597                     r % screen_desktop_layout.rows) *
 598                 screen_desktop_layout.columns +
 599                 c % screen_desktop_layout.columns;
 600         case OB_CORNER_TOPRIGHT:
 601             return r % screen_desktop_layout.rows *
 602                 screen_desktop_layout.columns +
 603                 (screen_desktop_layout.columns - 1 -
 604                  c % screen_desktop_layout.columns);
 605         case OB_CORNER_BOTTOMRIGHT:
 606             return (screen_desktop_layout.rows - 1 -
 607                     r % screen_desktop_layout.rows) *
 608                 screen_desktop_layout.columns +
 609                 (screen_desktop_layout.columns - 1 -
 610                  c % screen_desktop_layout.columns);
 611         }
 612     case OB_ORIENTATION_VERT:
 613         switch (screen_desktop_layout.start_corner) {
 614         case OB_CORNER_TOPLEFT:
 615             return c % screen_desktop_layout.columns *
 616                 screen_desktop_layout.rows +
 617                 r % screen_desktop_layout.rows;
 618         case OB_CORNER_BOTTOMLEFT:
 619             return c % screen_desktop_layout.columns *
 620                 screen_desktop_layout.rows +
 621                 (screen_desktop_layout.rows - 1 -
 622                  r % screen_desktop_layout.rows);
 623         case OB_CORNER_TOPRIGHT:
 624             return (screen_desktop_layout.columns - 1 -
 625                     c % screen_desktop_layout.columns) *
 626                 screen_desktop_layout.rows +
 627                 r % screen_desktop_layout.rows;
 628         case OB_CORNER_BOTTOMRIGHT:
 629             return (screen_desktop_layout.columns - 1 -
 630                     c % screen_desktop_layout.columns) *
 631                 screen_desktop_layout.rows +
 632                 (screen_desktop_layout.rows - 1 -
 633                  r % screen_desktop_layout.rows);
 634         }
 635     }
 636     g_assert_not_reached();
 637     return 0;
 638 }
 639
 640 void screen_desktop_popup(guint d, gboolean show)
 641 {
 642     Rect *a;
 643
 644     if (!show) {
 645         pager_popup_hide(desktop_cycle_popup);
 646     } else {
 647         a = screen_physical_area_monitor(0);
 648         pager_popup_position(desktop_cycle_popup, CenterGravity,
 649                              a->x + a->width / 2, a->y + a->height / 2);
 650         pager_popup_icon_size_multiplier(desktop_cycle_popup,
 651                                          (screen_desktop_layout.columns /
 652                                           screen_desktop_layout.rows) / 2,
 653                                          (screen_desktop_layout.rows/
 654                                           screen_desktop_layout.columns) / 2);
 655         pager_popup_max_width(desktop_cycle_popup,
 656                               MAX(a->width/3, POPUP_WIDTH));
 657         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 658     }
 659 }
 660
 661 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 662                            gboolean dialog, gboolean done, gboolean cancel)
 663 {
 664     guint r, c;
 665     static guint d = (guint)-1;
 666     guint ret, oldd;
 667
 668     if (d == (guint)-1)
 669         d = screen_desktop;
 670
 671     if ((cancel || done) && dialog)
 672         goto show_cycle_dialog;
 673
 674     oldd = d;
 675     get_row_col(d, &r, &c);
 676
 677     if (linear) {
 678         switch (dir) {
 679         case OB_DIRECTION_EAST:
 680             if (d < screen_num_desktops - 1)
 681                 ++d;
 682             else if (wrap)
 683                 d = 0;
 684             break;
 685         case OB_DIRECTION_WEST:
 686             if (d > 0)
 687                 --d;
 688             else if (wrap)
 689                 d = screen_num_desktops - 1;
 690             break;
 691         default:
 692             assert(0);
 693             return screen_desktop;
 694         }
 695     } else {
 696         switch (dir) {
 697         case OB_DIRECTION_EAST:
 698             ++c;
 699             if (c >= screen_desktop_layout.columns) {
 700                 if (wrap)
 701                     c = 0;
 702                 else
 703                     goto show_cycle_dialog;
 704             }
 705             d = translate_row_col(r, c);
 706             if (d >= screen_num_desktops) {
 707                 if (wrap) {
 708                     ++c;
 709                 } else {
 710                     d = oldd;
 711                     goto show_cycle_dialog;
 712                 }
 713             }
 714             break;
 715         case OB_DIRECTION_WEST:
 716             --c;
 717             if (c >= screen_desktop_layout.columns) {
 718                 if (wrap)
 719                     c = screen_desktop_layout.columns - 1;
 720                 else
 721                     goto show_cycle_dialog;
 722             }
 723             d = translate_row_col(r, c);
 724             if (d >= screen_num_desktops) {
 725                 if (wrap) {
 726                     --c;
 727                 } else {
 728                     d = oldd;
 729                     goto show_cycle_dialog;
 730                 }
 731             }
 732             break;
 733         case OB_DIRECTION_SOUTH:
 734             ++r;
 735             if (r >= screen_desktop_layout.rows) {
 736                 if (wrap)
 737                     r = 0;
 738                 else
 739                     goto show_cycle_dialog;
 740             }
 741             d = translate_row_col(r, c);
 742             if (d >= screen_num_desktops) {
 743                 if (wrap) {
 744                     ++r;
 745                 } else {
 746                     d = oldd;
 747                     goto show_cycle_dialog;
 748                 }
 749             }
 750             break;
 751         case OB_DIRECTION_NORTH:
 752             --r;
 753             if (r >= screen_desktop_layout.rows) {
 754                 if (wrap)
 755                     r = screen_desktop_layout.rows - 1;
 756                 else
 757                     goto show_cycle_dialog;
 758             }
 759             d = translate_row_col(r, c);
 760             if (d >= screen_num_desktops) {
 761                 if (wrap) {
 762                     --r;
 763                 } else {
 764                     d = oldd;
 765                     goto show_cycle_dialog;
 766                 }
 767             }
 768             break;
 769         default:
 770             assert(0);
 771             return d = screen_desktop;
 772         }
 773
 774         d = translate_row_col(r, c);
 775     }
 776
 777 show_cycle_dialog:
 778     if (dialog && !cancel && !done) {
 779         screen_desktop_popup(d, TRUE);
 780     } else
 781         screen_desktop_popup(0, FALSE);
 782     ret = d;
 783
 784     if (!dialog || cancel || done)
 785         d = (guint)-1;
 786
 787     return ret;
 788 }
 789
 790 void screen_update_layout()
 791 {
 792     ObOrientation orient;
 793     ObCorner corner;
 794     guint rows;
 795     guint cols;
 796     guint32 *data;
 797     guint num;
 798     gboolean valid = FALSE;
 799
 800     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 801                     net_desktop_layout, cardinal, &data, &num)) {
 802         if (num == 3 || num == 4) {
 803
 804             if (data[0] == prop_atoms.net_wm_orientation_vert)
 805                 orient = OB_ORIENTATION_VERT;
 806             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 807                 orient = OB_ORIENTATION_HORZ;
 808             else
 809                 goto screen_update_layout_bail;
 810
 811             if (num < 4)
 812                 corner = OB_CORNER_TOPLEFT;
 813             else {
 814                 if (data[3] == prop_atoms.net_wm_topleft)
 815                     corner = OB_CORNER_TOPLEFT;
 816                 else if (data[3] == prop_atoms.net_wm_topright)
 817                     corner = OB_CORNER_TOPRIGHT;
 818                 else if (data[3] == prop_atoms.net_wm_bottomright)
 819                     corner = OB_CORNER_BOTTOMRIGHT;
 820                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 821                     corner = OB_CORNER_BOTTOMLEFT;
 822                 else
 823                     goto screen_update_layout_bail;
 824             }
 825
 826             cols = data[1];
 827             rows = data[2];
 828
 829             /* fill in a zero rows/columns */
 830             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 831                 goto screen_update_layout_bail;
 832             } else {
 833                 if (cols == 0) {
 834                     cols = screen_num_desktops / rows;
 835                     if (rows * cols < screen_num_desktops)
 836                         cols++;
 837                     if (rows * cols >= screen_num_desktops + cols)
 838                         rows--;
 839                 } else if (rows == 0) {
 840                     rows = screen_num_desktops / cols;
 841                     if (cols * rows < screen_num_desktops)
 842                         rows++;
 843                     if (cols * rows >= screen_num_desktops + rows)
 844                         cols--;
 845                 }
 846             }
 847
 848             /* bounds checking */
 849             if (orient == OB_ORIENTATION_HORZ) {
 850                 cols = MIN(screen_num_desktops, cols);
 851                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 852                 cols = screen_num_desktops / rows +
 853                     !!(screen_num_desktops % rows);
 854             } else {
 855                 rows = MIN(screen_num_desktops, rows);
 856                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 857                 rows = screen_num_desktops / cols +
 858                     !!(screen_num_desktops % cols);
 859             }
 860
 861             valid = TRUE;
 862         }
 863     screen_update_layout_bail:
 864         g_free(data);
 865     }
 866
 867     if (!valid) {
 868         /* defaults */
 869         orient = OB_ORIENTATION_HORZ;
 870         corner = OB_CORNER_TOPLEFT;
 871         rows = 1;
 872         cols = screen_num_desktops;
 873     }
 874
 875     screen_desktop_layout.orientation = orient;
 876     screen_desktop_layout.start_corner = corner;
 877     screen_desktop_layout.rows = rows;
 878     screen_desktop_layout.columns = cols;
 879 }
 880
 881 void screen_update_desktop_names()
 882 {
 883     guint i;
 884
 885     /* empty the array */
 886     g_strfreev(screen_desktop_names);
 887     screen_desktop_names = NULL;
 888
 889     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 890                    net_desktop_names, utf8, &screen_desktop_names))
 891         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
 892     else
 893         i = 0;
 894     if (i < screen_num_desktops) {
 895         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 896                                        screen_num_desktops + 1);
 897         screen_desktop_names[screen_num_desktops] = NULL;
 898         for (; i < screen_num_desktops; ++i)
 899             screen_desktop_names[i] = g_strdup_printf("desktop %i", i + 1);
 900     }
 901
 902     /* resize the pager for these names */
 903     pager_popup_text_width_to_strings(desktop_cycle_popup,
 904                                       screen_desktop_names,
 905                                       screen_num_desktops);
 906 }
 907
 908 void screen_show_desktop(gboolean show, ObClient *show_only)
 909 {
 910     GList *it;
 911
 912     if (show == screen_showing_desktop) return; /* no change */
 913
 914     screen_showing_desktop = show;
 915
 916     if (show) {
 917         /* hide windows bottom to top */
 918         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 919             if (WINDOW_IS_CLIENT(it->data)) {
 920                 ObClient *client = it->data;
 921                 client_showhide(client);
 922             }
 923         }
 924     }
 925     else {
 926         /* restore windows top to bottom */
 927         for (it = stacking_list; it; it = g_list_next(it)) {
 928             if (WINDOW_IS_CLIENT(it->data)) {
 929                 ObClient *client = it->data;
 930                 if (client_should_show(client)) {
 931                     if (!show_only || client == show_only)
 932                         client_show(client);
 933                     else
 934                         client_iconify(client, TRUE, FALSE, TRUE);
 935                 }
 936             }
 937         }
 938     }
 939
 940     if (show) {
 941         /* focus the desktop */
 942         for (it = focus_order; it; it = g_list_next(it)) {
 943             ObClient *c = it->data;
 944             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
 945                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
 946                 client_focus(it->data))
 947                 break;
 948         }
 949     }
 950     else if (!show_only) {
 951         ObClient *c;
 952
 953         if ((c = focus_fallback(TRUE))) {
 954             /* only do the flicker reducing stuff ahead of time if we are going
 955                to call xsetinputfocus on the window ourselves. otherwise there
 956                is no guarantee the window will actually take focus.. */
 957             if (c->can_focus) {
 958                 /* reduce flicker by hiliting now rather than waiting for the
 959                    server FocusIn event */
 960                 frame_adjust_focus(c->frame, TRUE);
 961             }
 962         }
 963     }
 964
 965     show = !!show; /* make it boolean */
 966     PROP_SET32(RootWindow(ob_display, ob_screen),
 967                net_showing_desktop, cardinal, show);
 968 }
 969
 970 void screen_install_colormap(ObClient *client, gboolean install)
 971 {
 972     if (client == NULL) {
 973         if (install)
 974             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 975         else
 976             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 977     } else {
 978         xerror_set_ignore(TRUE);
 979         if (install) {
 980             if (client->colormap != None)
 981                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 982         } else
 983             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
 984         xerror_set_ignore(FALSE);
 985     }
 986 }
 987
 988 static inline void
 989 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 990                            gint edge, Strut *ret)
 991 {
 992     if (s->left &&
 993         ((s->left_end <= s->left_start) ||
 994          (RECT_TOP(*monitor_area) < s->left_end &&
 995           RECT_BOTTOM(*monitor_area) > s->left_start)))
 996         ret->left = MAX(ret->left, edge);
 997 }
 998
 999 static inline void
1000 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
1001                           gint edge, Strut *ret)
1002 {
1003     if (s->top &&
1004         ((s->top_end <= s->top_start) ||
1005          (RECT_LEFT(*monitor_area) < s->top_end &&
1006           RECT_RIGHT(*monitor_area) > s->top_start)))
1007         ret->top = MAX(ret->top, edge);
1008 }
1009
1010 static inline void
1011 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
1012                             gint edge, Strut *ret)
1013 {
1014     if (s->right &&
1015         ((s->right_end <= s->right_start) ||
1016          (RECT_TOP(*monitor_area) < s->right_end &&
1017           RECT_BOTTOM(*monitor_area) > s->right_start)))
1018         ret->right = MAX(ret->right, edge);
1019 }
1020
1021 static inline void
1022 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
1023                              gint edge, Strut *ret)
1024 {
1025     if (s->bottom &&
1026         ((s->bottom_end <= s->bottom_start) ||
1027          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1028           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1029         ret->bottom = MAX(ret->bottom, edge);
1030 }
1031
1032 void screen_update_areas()
1033 {
1034     guint i, x;
1035     gulong *dims;
1036     GList *it;
1037     gint o;
1038
1039     g_free(monitor_area);
1040     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1041
1042     if (area) {
1043         for (i = 0; area[i]; ++i)
1044             g_free(area[i]);
1045         g_free(area);
1046     }
1047
1048     area = g_new(Rect*, screen_num_desktops + 2);
1049     for (i = 0; i < screen_num_desktops + 1; ++i)
1050         area[i] = g_new0(Rect, screen_num_monitors + 1);
1051     area[i] = NULL;
1052
1053     dims = g_new(gulong, 4 * screen_num_desktops);
1054
1055     for (i = 0; i < screen_num_desktops + 1; ++i) {
1056         Strut *struts;
1057         gint l, r, t, b;
1058
1059         struts = g_new0(Strut, screen_num_monitors);
1060
1061         /* calc the xinerama areas */
1062         for (x = 0; x < screen_num_monitors; ++x) {
1063             area[i][x] = monitor_area[x];
1064             if (x == 0) {
1065                 l = monitor_area[x].x;
1066                 t = monitor_area[x].y;
1067                 r = monitor_area[x].x + monitor_area[x].width - 1;
1068                 b = monitor_area[x].y + monitor_area[x].height - 1;
1069             } else {
1070                 l = MIN(l, monitor_area[x].x);
1071                 t = MIN(t, monitor_area[x].y);
1072                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1073                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1074             }
1075         }
1076         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1077
1078         /* apply the struts */
1079
1080         /* find the left-most xin heads, i do this in 2 loops :| */
1081         o = area[i][0].x;
1082         for (x = 1; x < screen_num_monitors; ++x)
1083             o = MIN(o, area[i][x].x);
1084
1085         for (x = 0; x < screen_num_monitors; ++x) {
1086             for (it = client_list; it; it = g_list_next(it)) {
1087                 ObClient *c = it->data;
1088                 screen_area_add_strut_left(&c->strut,
1089                                            &monitor_area[x],
1090                                            o + c->strut.left - area[i][x].x,
1091                                            &struts[x]);
1092             }
1093             screen_area_add_strut_left(&dock_strut,
1094                                        &monitor_area[x],
1095                                        o + dock_strut.left - area[i][x].x,
1096                                        &struts[x]);
1097
1098             area[i][x].x += struts[x].left;
1099             area[i][x].width -= struts[x].left;
1100         }
1101
1102         /* find the top-most xin heads, i do this in 2 loops :| */
1103         o = area[i][0].y;
1104         for (x = 1; x < screen_num_monitors; ++x)
1105             o = MIN(o, area[i][x].y);
1106
1107         for (x = 0; x < screen_num_monitors; ++x) {
1108             for (it = client_list; it; it = g_list_next(it)) {
1109                 ObClient *c = it->data;
1110                 screen_area_add_strut_top(&c->strut,
1111                                            &monitor_area[x],
1112                                            o + c->strut.top - area[i][x].y,
1113                                            &struts[x]);
1114             }
1115             screen_area_add_strut_top(&dock_strut,
1116                                       &monitor_area[x],
1117                                       o + dock_strut.top - area[i][x].y,
1118                                       &struts[x]);
1119
1120             area[i][x].y += struts[x].top;
1121             area[i][x].height -= struts[x].top;
1122         }
1123
1124         /* find the right-most xin heads, i do this in 2 loops :| */
1125         o = area[i][0].x + area[i][0].width - 1;
1126         for (x = 1; x < screen_num_monitors; ++x)
1127             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1128
1129         for (x = 0; x < screen_num_monitors; ++x) {
1130             for (it = client_list; it; it = g_list_next(it)) {
1131                 ObClient *c = it->data;
1132                 screen_area_add_strut_right(&c->strut,
1133                                            &monitor_area[x],
1134                                            (area[i][x].x +
1135                                             area[i][x].width - 1) -
1136                                             (o - c->strut.right),
1137                                             &struts[x]);
1138             }
1139             screen_area_add_strut_right(&dock_strut,
1140                                         &monitor_area[x],
1141                                         (area[i][x].x +
1142                                          area[i][x].width - 1) -
1143                                         (o - dock_strut.right),
1144                                         &struts[x]);
1145
1146             area[i][x].width -= struts[x].right;
1147         }
1148
1149         /* find the bottom-most xin heads, i do this in 2 loops :| */
1150         o = area[i][0].y + area[i][0].height - 1;
1151         for (x = 1; x < screen_num_monitors; ++x)
1152             o = MAX(o, area[i][x].y + area[i][x].height - 1);
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_bottom(&c->strut,
1158                                              &monitor_area[x],
1159                                              (area[i][x].y +
1160                                               area[i][x].height - 1) - \
1161                                              (o - c->strut.bottom),
1162                                              &struts[x]);
1163             }
1164             screen_area_add_strut_bottom(&dock_strut,
1165                                          &monitor_area[x],
1166                                          (area[i][x].y +
1167                                           area[i][x].height - 1) - \
1168                                          (o - dock_strut.bottom),
1169                                          &struts[x]);
1170
1171             area[i][x].height -= struts[x].bottom;
1172         }
1173
1174         l = RECT_LEFT(area[i][0]);
1175         t = RECT_TOP(area[i][0]);
1176         r = RECT_RIGHT(area[i][0]);
1177         b = RECT_BOTTOM(area[i][0]);
1178         for (x = 1; x < screen_num_monitors; ++x) {
1179             l = MIN(l, RECT_LEFT(area[i][x]));
1180             t = MIN(l, RECT_TOP(area[i][x]));
1181             r = MAX(r, RECT_RIGHT(area[i][x]));
1182             b = MAX(b, RECT_BOTTOM(area[i][x]));
1183         }
1184         RECT_SET(area[i][screen_num_monitors], l, t,
1185                  r - l + 1, b - t + 1);
1186
1187         /* XXX optimize when this is run? */
1188
1189         /* the area has changed, adjust all the maximized
1190            windows */
1191         for (it = client_list; it; it = g_list_next(it)) {
1192             ObClient *c = it->data;
1193             if (i < screen_num_desktops) {
1194                 if (c->desktop == i)
1195                     client_reconfigure(c);
1196             } else if (c->desktop == DESKTOP_ALL)
1197                 client_reconfigure(c);
1198         }
1199         if (i < screen_num_desktops) {
1200             /* don't set these for the 'all desktops' area */
1201             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1202             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1203             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1204             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1205         }
1206
1207         g_free(struts);
1208     }
1209
1210     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1211                 dims, 4 * screen_num_desktops);
1212
1213     g_free(dims);
1214 }
1215
1216 Rect *screen_area(guint desktop)
1217 {
1218     return screen_area_monitor(desktop, screen_num_monitors);
1219 }
1220
1221 Rect *screen_area_monitor(guint desktop, guint head)
1222 {
1223     if (head > screen_num_monitors)
1224         return NULL;
1225     if (desktop >= screen_num_desktops) {
1226         if (desktop == DESKTOP_ALL)
1227             return &area[screen_num_desktops][head];
1228         return NULL;
1229     }
1230     return &area[desktop][head];
1231 }
1232
1233 guint screen_find_monitor(Rect *search)
1234 {
1235     guint i;
1236     guint most = 0;
1237     guint mostv = 0;
1238
1239     for (i = 0; i < screen_num_monitors; ++i) {
1240         Rect *area = screen_physical_area_monitor(i);
1241         if (RECT_INTERSECTS_RECT(*area, *search)) {
1242             Rect r;
1243             guint v;
1244
1245             RECT_SET_INTERSECTION(r, *area, *search);
1246             v = r.width * r.height;
1247
1248             if (v > mostv) {
1249                 mostv = v;
1250                 most = i;
1251             }
1252         }
1253     }
1254     return most;
1255 }
1256
1257 Rect *screen_physical_area()
1258 {
1259     return screen_physical_area_monitor(screen_num_monitors);
1260 }
1261
1262 Rect *screen_physical_area_monitor(guint head)
1263 {
1264     if (head > screen_num_monitors)
1265         return NULL;
1266     return &monitor_area[head];
1267 }
1268
1269 void screen_set_root_cursor()
1270 {
1271     if (sn_app_starting())
1272         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1273                       ob_cursor(OB_CURSOR_BUSY));
1274     else
1275         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1276                       ob_cursor(OB_CURSOR_POINTER));
1277 }
1278
1279 gboolean screen_pointer_pos(gint *x, gint *y)
1280 {
1281     Window w;
1282     gint i;
1283     guint u;
1284     gboolean ret;
1285
1286     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1287                           &w, &w, x, y, &i, &i, &u);
1288     if (!ret) {
1289         for (i = 0; i < ScreenCount(ob_display); ++i)
1290             if (i != ob_screen)
1291                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1292                                   &w, &w, x, y, &i, &i, &u))
1293                     break;
1294     }
1295     return ret;
1296 }