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 static gboolean screen_validate_layout(ObDesktopLayout *l);
  54 static gboolean replace_wm();
  55 static void     screen_tell_ksplash();
  56
  57 guint    screen_num_desktops;
  58 guint    screen_num_monitors;
  59 guint    screen_desktop;
  60 guint    screen_last_desktop;
  61 Size     screen_physical_size;
  62 gboolean screen_showing_desktop;
  63 ObDesktopLayout screen_desktop_layout;
  64 gchar  **screen_desktop_names;
  65 Window   screen_support_win;
  66 Time     screen_desktop_user_time = CurrentTime;
  67
  68 static Rect  **area; /* array of desktop holding array of xinerama areas */
  69 static Rect  *monitor_area;
  70
  71 static ObPagerPopup *desktop_cycle_popup;
  72
  73 static gboolean replace_wm()
  74 {
  75     gchar *wm_sn;
  76     Atom wm_sn_atom;
  77     Window current_wm_sn_owner;
  78     Time timestamp;
  79
  80     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  81     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  82     g_free(wm_sn);
  83
  84     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  85     if (current_wm_sn_owner == screen_support_win)
  86         current_wm_sn_owner = None;
  87     if (current_wm_sn_owner) {
  88         if (!ob_replace_wm) {
  89             g_message(_("A window manager is already running on screen %d"),
  90                       ob_screen);
  91             return FALSE;
  92         }
  93         xerror_set_ignore(TRUE);
  94         xerror_occured = FALSE;
  95
  96         /* We want to find out when the current selection owner dies */
  97         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  98         XSync(ob_display, FALSE);
  99
 100         xerror_set_ignore(FALSE);
 101         if (xerror_occured)
 102             current_wm_sn_owner = None;
 103     }
 104
 105     {
 106         /* Generate a timestamp */
 107         XEvent event;
 108
 109         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 110
 111         XChangeProperty(ob_display, screen_support_win,
 112                         prop_atoms.wm_class, prop_atoms.string,
 113                         8, PropModeAppend, NULL, 0);
 114         XWindowEvent(ob_display, screen_support_win,
 115                      PropertyChangeMask, &event);
 116
 117         XSelectInput(ob_display, screen_support_win, NoEventMask);
 118
 119         timestamp = event.xproperty.time;
 120     }
 121
 122     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 123                        timestamp);
 124
 125     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 126         g_message(_("Could not acquire window manager selection on screen %d"),
 127                   ob_screen);
 128         return FALSE;
 129     }
 130
 131     /* Wait for old window manager to go away */
 132     if (current_wm_sn_owner) {
 133       XEvent event;
 134       gulong wait = 0;
 135       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 136
 137       while (wait < timeout) {
 138           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 139                                 StructureNotifyMask, &event) &&
 140               event.type == DestroyNotify)
 141               break;
 142           g_usleep(G_USEC_PER_SEC / 10);
 143           wait += G_USEC_PER_SEC / 10;
 144       }
 145
 146       if (wait >= timeout) {
 147           g_message(_("The WM on screen %d is not exiting"), ob_screen);
 148           return FALSE;
 149       }
 150     }
 151
 152     /* Send client message indicating that we are now the WM */
 153     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 154                  timestamp, wm_sn_atom, screen_support_win, 0,
 155                  SubstructureNotifyMask);
 156
 157     return TRUE;
 158 }
 159
 160 gboolean screen_annex()
 161 {
 162     XSetWindowAttributes attrib;
 163     pid_t pid;
 164     gint i, num_support;
 165     Atom *prop_atoms_start, *wm_supported_pos;
 166     gulong *supported;
 167
 168     /* create the netwm support window */
 169     attrib.override_redirect = TRUE;
 170     screen_support_win = XCreateWindow(ob_display,
 171                                        RootWindow(ob_display, ob_screen),
 172                                        -100, -100, 1, 1, 0,
 173                                        CopyFromParent, InputOutput,
 174                                        CopyFromParent,
 175                                        CWOverrideRedirect, &attrib);
 176     XMapWindow(ob_display, screen_support_win);
 177     XLowerWindow(ob_display, screen_support_win);
 178
 179     if (!replace_wm()) {
 180         XDestroyWindow(ob_display, screen_support_win);
 181         return FALSE;
 182     }
 183
 184     xerror_set_ignore(TRUE);
 185     xerror_occured = FALSE;
 186     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 187                  ROOT_EVENTMASK);
 188     xerror_set_ignore(FALSE);
 189     if (xerror_occured) {
 190         g_message(_("A window manager is already running on screen %d"),
 191                   ob_screen);
 192
 193         XDestroyWindow(ob_display, screen_support_win);
 194         return FALSE;
 195     }
 196
 197     screen_set_root_cursor();
 198
 199     /* set the OPENBOX_PID hint */
 200     pid = getpid();
 201     PROP_SET32(RootWindow(ob_display, ob_screen),
 202                openbox_pid, cardinal, pid);
 203
 204     /* set supporting window */
 205     PROP_SET32(RootWindow(ob_display, ob_screen),
 206                net_supporting_wm_check, window, screen_support_win);
 207
 208     /* set properties on the supporting window */
 209     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 210     PROP_SET32(screen_support_win, net_supporting_wm_check,
 211                window, screen_support_win);
 212
 213     /* set the _NET_SUPPORTED_ATOMS hint */
 214
 215     /* this is all the atoms after net_supported in the prop_atoms struct */
 216     prop_atoms_start = (Atom*)&prop_atoms;
 217     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
 218     num_support = sizeof(prop_atoms) / sizeof(Atom) -
 219         (wm_supported_pos - prop_atoms_start) - 1;
 220     i = 0;
 221     supported = g_new(gulong, num_support);
 222     supported[i++] = prop_atoms.net_supporting_wm_check;
 223     supported[i++] = prop_atoms.net_wm_full_placement;
 224     supported[i++] = prop_atoms.net_current_desktop;
 225     supported[i++] = prop_atoms.net_number_of_desktops;
 226     supported[i++] = prop_atoms.net_desktop_geometry;
 227     supported[i++] = prop_atoms.net_desktop_viewport;
 228     supported[i++] = prop_atoms.net_active_window;
 229     supported[i++] = prop_atoms.net_workarea;
 230     supported[i++] = prop_atoms.net_client_list;
 231     supported[i++] = prop_atoms.net_client_list_stacking;
 232     supported[i++] = prop_atoms.net_desktop_names;
 233     supported[i++] = prop_atoms.net_close_window;
 234     supported[i++] = prop_atoms.net_desktop_layout;
 235     supported[i++] = prop_atoms.net_showing_desktop;
 236     supported[i++] = prop_atoms.net_wm_name;
 237     supported[i++] = prop_atoms.net_wm_visible_name;
 238     supported[i++] = prop_atoms.net_wm_icon_name;
 239     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 240     supported[i++] = prop_atoms.net_wm_desktop;
 241     supported[i++] = prop_atoms.net_wm_strut;
 242     supported[i++] = prop_atoms.net_wm_strut_partial;
 243     supported[i++] = prop_atoms.net_wm_icon;
 244     supported[i++] = prop_atoms.net_wm_icon_geometry;
 245     supported[i++] = prop_atoms.net_wm_window_type;
 246     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 247     supported[i++] = prop_atoms.net_wm_window_type_dock;
 248     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 249     supported[i++] = prop_atoms.net_wm_window_type_menu;
 250     supported[i++] = prop_atoms.net_wm_window_type_utility;
 251     supported[i++] = prop_atoms.net_wm_window_type_splash;
 252     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 253     supported[i++] = prop_atoms.net_wm_window_type_normal;
 254     supported[i++] = prop_atoms.net_wm_allowed_actions;
 255     supported[i++] = prop_atoms.net_wm_action_move;
 256     supported[i++] = prop_atoms.net_wm_action_resize;
 257     supported[i++] = prop_atoms.net_wm_action_minimize;
 258     supported[i++] = prop_atoms.net_wm_action_shade;
 259     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 260     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 261     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 262     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 263     supported[i++] = prop_atoms.net_wm_action_close;
 264     supported[i++] = prop_atoms.net_wm_action_above;
 265     supported[i++] = prop_atoms.net_wm_action_below;
 266     supported[i++] = prop_atoms.net_wm_state;
 267     supported[i++] = prop_atoms.net_wm_state_modal;
 268     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 269     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 270     supported[i++] = prop_atoms.net_wm_state_shaded;
 271     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 272     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 273     supported[i++] = prop_atoms.net_wm_state_hidden;
 274     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 275     supported[i++] = prop_atoms.net_wm_state_above;
 276     supported[i++] = prop_atoms.net_wm_state_below;
 277     supported[i++] = prop_atoms.net_wm_state_demands_attention;
 278     supported[i++] = prop_atoms.net_moveresize_window;
 279     supported[i++] = prop_atoms.net_wm_moveresize;
 280     supported[i++] = prop_atoms.net_wm_user_time;
 281     supported[i++] = prop_atoms.net_wm_user_time_window;
 282     supported[i++] = prop_atoms.net_frame_extents;
 283     supported[i++] = prop_atoms.net_request_frame_extents;
 284     supported[i++] = prop_atoms.net_restack_window;
 285     supported[i++] = prop_atoms.net_startup_id;
 286 #ifdef SYNC
 287     supported[i++] = prop_atoms.net_wm_sync_request;
 288     supported[i++] = prop_atoms.net_wm_sync_request_counter;
 289 #endif
 290
 291     supported[i++] = prop_atoms.kde_wm_change_state;
 292     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
 293     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
 294
 295     supported[i++] = prop_atoms.ob_wm_action_undecorate;
 296     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 297     supported[i++] = prop_atoms.openbox_pid;
 298     supported[i++] = prop_atoms.ob_theme;
 299     supported[i++] = prop_atoms.ob_control;
 300     g_assert(i == num_support);
 301
 302     PROP_SETA32(RootWindow(ob_display, ob_screen),
 303                 net_supported, atom, supported, num_support);
 304     g_free(supported);
 305
 306     screen_tell_ksplash();
 307
 308     return TRUE;
 309 }
 310
 311 static void screen_tell_ksplash()
 312 {
 313     XEvent e;
 314     char **argv;
 315
 316     argv = g_new(gchar*, 6);
 317     argv[0] = g_strdup("dcop");
 318     argv[1] = g_strdup("ksplash");
 319     argv[2] = g_strdup("ksplash");
 320     argv[3] = g_strdup("upAndRunning(QString)");
 321     argv[4] = g_strdup("wm started");
 322     argv[5] = NULL;
 323
 324     /* tell ksplash through the dcop server command line interface */
 325     g_spawn_async(NULL, argv, NULL,
 326                   G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
 327                   G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
 328                   NULL, NULL, NULL, NULL);
 329     g_strfreev(argv);
 330
 331     /* i'm not sure why we do this, kwin does it, but ksplash doesn't seem to
 332        hear it anyways. perhaps it is for old ksplash. or new ksplash. or
 333        something. oh well. */
 334     e.xclient.type = ClientMessage;
 335     e.xclient.display = ob_display;
 336     e.xclient.window = RootWindow(ob_display, ob_screen);
 337     e.xclient.message_type =
 338         XInternAtom(ob_display, "_KDE_SPLASH_PROGRESS", False );
 339     e.xclient.format = 8;
 340     strcpy(e.xclient.data.b, "wm started");
 341     XSendEvent(ob_display, RootWindow(ob_display, ob_screen),
 342                False, SubstructureNotifyMask, &e );
 343 }
 344
 345 void screen_startup(gboolean reconfig)
 346 {
 347     gchar **names = NULL;
 348     guint32 d;
 349     gboolean namesexist = FALSE;
 350
 351     desktop_cycle_popup = pager_popup_new(FALSE);
 352     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
 353
 354     if (reconfig) {
 355         /* update the pager popup's width */
 356         pager_popup_text_width_to_strings(desktop_cycle_popup,
 357                                           screen_desktop_names,
 358                                           screen_num_desktops);
 359         return;
 360     }
 361
 362     /* get the initial size */
 363     screen_resize();
 364
 365     /* have names already been set for the desktops? */
 366     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 367                    net_desktop_names, utf8, &names))
 368     {
 369         g_strfreev(names);
 370         namesexist = TRUE;
 371     }
 372
 373     /* if names don't exist and we have session names, set those.
 374        do this stuff BEFORE setting the number of desktops, because that
 375        will create default names for them
 376     */
 377     if (!namesexist && session_desktop_names != NULL) {
 378         guint i, numnames;
 379         GSList *it;
 380
 381         /* get the desktop names */
 382         numnames = g_slist_length(session_desktop_names);
 383         names = g_new(gchar*, numnames + 1);
 384         names[numnames] = NULL;
 385         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
 386             names[i] = g_strdup(it->data);
 387
 388         /* set the root window property */
 389         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
 390
 391         g_strfreev(names);
 392     }
 393
 394     /* set the number of desktops, if it's not already set.
 395
 396        this will also set the default names from the config file up for
 397        desktops that don't have names yet */
 398     screen_num_desktops = 0;
 399     if (PROP_GET32(RootWindow(ob_display, ob_screen),
 400                    net_number_of_desktops, cardinal, &d))
 401         screen_set_num_desktops(d);
 402     /* restore from session if possible */
 403     else if (session_num_desktops)
 404         screen_set_num_desktops(session_num_desktops);
 405     else
 406         screen_set_num_desktops(config_desktops_num);
 407
 408     screen_desktop = screen_num_desktops;  /* something invalid */
 409     /* start on the current desktop when a wm was already running */
 410     if (PROP_GET32(RootWindow(ob_display, ob_screen),
 411                    net_current_desktop, cardinal, &d) &&
 412         d < screen_num_desktops)
 413     {
 414         screen_set_desktop(d, FALSE);
 415     } else if (session_desktop >= 0)
 416         screen_set_desktop(MIN((guint)session_desktop,
 417                                screen_num_desktops), FALSE);
 418     else
 419         screen_set_desktop(MIN(config_screen_firstdesk,
 420                                screen_num_desktops) - 1, FALSE);
 421     screen_last_desktop = screen_desktop;
 422
 423     /* don't start in showing-desktop mode */
 424     screen_showing_desktop = FALSE;
 425     PROP_SET32(RootWindow(ob_display, ob_screen),
 426                net_showing_desktop, cardinal, screen_showing_desktop);
 427
 428     if (session_desktop_layout_present &&
 429         screen_validate_layout(&session_desktop_layout))
 430     {
 431         screen_desktop_layout = session_desktop_layout;
 432     }
 433     else
 434         screen_update_layout();
 435 }
 436
 437 void screen_shutdown(gboolean reconfig)
 438 {
 439     Rect **r;
 440
 441     pager_popup_free(desktop_cycle_popup);
 442
 443     if (reconfig)
 444         return;
 445
 446     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 447                  NoEventMask);
 448
 449     /* we're not running here no more! */
 450     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 451     /* not without us */
 452     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 453     /* don't keep this mode */
 454     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 455
 456     XDestroyWindow(ob_display, screen_support_win);
 457
 458     g_strfreev(screen_desktop_names);
 459     screen_desktop_names = NULL;
 460
 461     for (r = area; *r; ++r)
 462         g_free(*r);
 463     g_free(area);
 464     area = NULL;
 465 }
 466
 467 void screen_resize()
 468 {
 469     static gint oldw = 0, oldh = 0;
 470     gint w, h;
 471     GList *it;
 472     gulong geometry[2];
 473
 474     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 475     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 476
 477     if (w == oldw && h == oldh) return;
 478
 479     oldw = w; oldh = h;
 480
 481     /* Set the _NET_DESKTOP_GEOMETRY hint */
 482     screen_physical_size.width = geometry[0] = w;
 483     screen_physical_size.height = geometry[1] = h;
 484     PROP_SETA32(RootWindow(ob_display, ob_screen),
 485                 net_desktop_geometry, cardinal, geometry, 2);
 486
 487     if (ob_state() == OB_STATE_STARTING)
 488         return;
 489
 490     screen_update_areas();
 491     dock_configure();
 492
 493     for (it = client_list; it; it = g_list_next(it))
 494         client_move_onscreen(it->data, FALSE);
 495 }
 496
 497 void screen_set_num_desktops(guint num)
 498 {
 499     guint old;
 500     gulong *viewport;
 501     GList *it;
 502
 503     g_assert(num > 0);
 504
 505     if (screen_num_desktops == num) return;
 506
 507     old = screen_num_desktops;
 508     screen_num_desktops = num;
 509     PROP_SET32(RootWindow(ob_display, ob_screen),
 510                net_number_of_desktops, cardinal, num);
 511
 512     /* set the viewport hint */
 513     viewport = g_new0(gulong, num * 2);
 514     PROP_SETA32(RootWindow(ob_display, ob_screen),
 515                 net_desktop_viewport, cardinal, viewport, num * 2);
 516     g_free(viewport);
 517
 518     /* the number of rows/columns will differ */
 519     screen_update_layout();
 520
 521     /* move windows on desktops that will no longer exist! */
 522     for (it = client_list; it; it = g_list_next(it)) {
 523         ObClient *c = it->data;
 524         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 525             client_set_desktop(c, num - 1, FALSE);
 526     }
 527
 528     /* change our struts/area to match (after moving windows) */
 529     screen_update_areas();
 530
 531     /* may be some unnamed desktops that we need to fill in with names
 532      (after updating the areas so the popup can resize) */
 533     screen_update_desktop_names();
 534
 535     /* change our desktop if we're on one that no longer exists! */
 536     if (screen_desktop >= screen_num_desktops)
 537         screen_set_desktop(num - 1, TRUE);
 538 }
 539
 540 void screen_set_desktop(guint num, gboolean dofocus)
 541 {
 542     ObClient *c;
 543     GList *it;
 544     guint old;
 545     gulong ignore_start;
 546     gboolean allow_omni;
 547
 548     g_assert(num < screen_num_desktops);
 549
 550     old = screen_desktop;
 551     screen_desktop = num;
 552
 553     if (old == num) return;
 554
 555     PROP_SET32(RootWindow(ob_display, ob_screen),
 556                net_current_desktop, cardinal, num);
 557
 558     screen_last_desktop = old;
 559
 560     ob_debug("Moving to desktop %d\n", num+1);
 561
 562     /* ignore enter events caused by the move */
 563     ignore_start = event_start_ignore_all_enters();
 564
 565     if (moveresize_client)
 566         client_set_desktop(moveresize_client, num, TRUE);
 567
 568     /* show windows before hiding the rest to lessen the enter/leave events */
 569
 570     /* show windows from top to bottom */
 571     for (it = stacking_list; it; it = g_list_next(it)) {
 572         if (WINDOW_IS_CLIENT(it->data)) {
 573             ObClient *c = it->data;
 574             client_show(c);
 575         }
 576     }
 577
 578     /* only allow omnipresent windows to get focus on desktop change if
 579        an omnipresent window is already focused (it'll keep focus probably, but
 580        maybe not depending on mouse-focus options) */
 581     allow_omni = focus_client && (client_normal(focus_client) &&
 582                                   focus_client->desktop == DESKTOP_ALL);
 583
 584     /* have to try focus here because when you leave an empty desktop
 585        there is no focus out to watch for. also, we have different rules
 586        here. we always allow it to look under the mouse pointer if
 587        config_focus_last is FALSE
 588
 589        do this before hiding the windows so if helper windows are coming
 590        with us, they don't get hidden
 591     */
 592     if (dofocus && (c = focus_fallback(TRUE, !config_focus_last, allow_omni)))
 593     {
 594         /* only do the flicker reducing stuff ahead of time if we are going
 595            to call xsetinputfocus on the window ourselves. otherwise there is
 596            no guarantee the window will actually take focus.. */
 597         if (c->can_focus) {
 598             /* reduce flicker by hiliting now rather than waiting for the
 599                server FocusIn event */
 600             frame_adjust_focus(c->frame, TRUE);
 601             /* do this here so that if you switch desktops to a window with
 602                helper windows then the helper windows won't flash */
 603             client_bring_helper_windows(c);
 604         }
 605     }
 606
 607     /* hide windows from bottom to top */
 608     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 609         if (WINDOW_IS_CLIENT(it->data)) {
 610             ObClient *c = it->data;
 611             client_hide(c);
 612         }
 613     }
 614
 615     event_end_ignore_all_enters(ignore_start);
 616
 617     if (event_curtime != CurrentTime)
 618         screen_desktop_user_time = event_curtime;
 619 }
 620
 621 static void get_row_col(guint d, guint *r, guint *c)
 622 {
 623     switch (screen_desktop_layout.orientation) {
 624     case OB_ORIENTATION_HORZ:
 625         switch (screen_desktop_layout.start_corner) {
 626         case OB_CORNER_TOPLEFT:
 627             *r = d / screen_desktop_layout.columns;
 628             *c = d % screen_desktop_layout.columns;
 629             break;
 630         case OB_CORNER_BOTTOMLEFT:
 631             *r = screen_desktop_layout.rows - 1 -
 632                 d / screen_desktop_layout.columns;
 633             *c = d % screen_desktop_layout.columns;
 634             break;
 635         case OB_CORNER_TOPRIGHT:
 636             *r = d / screen_desktop_layout.columns;
 637             *c = screen_desktop_layout.columns - 1 -
 638                 d % screen_desktop_layout.columns;
 639             break;
 640         case OB_CORNER_BOTTOMRIGHT:
 641             *r = screen_desktop_layout.rows - 1 -
 642                 d / screen_desktop_layout.columns;
 643             *c = screen_desktop_layout.columns - 1 -
 644                 d % screen_desktop_layout.columns;
 645             break;
 646         }
 647         break;
 648     case OB_ORIENTATION_VERT:
 649         switch (screen_desktop_layout.start_corner) {
 650         case OB_CORNER_TOPLEFT:
 651             *r = d % screen_desktop_layout.rows;
 652             *c = d / screen_desktop_layout.rows;
 653             break;
 654         case OB_CORNER_BOTTOMLEFT:
 655             *r = screen_desktop_layout.rows - 1 -
 656                 d % screen_desktop_layout.rows;
 657             *c = d / screen_desktop_layout.rows;
 658             break;
 659         case OB_CORNER_TOPRIGHT:
 660             *r = d % screen_desktop_layout.rows;
 661             *c = screen_desktop_layout.columns - 1 -
 662                 d / screen_desktop_layout.rows;
 663             break;
 664         case OB_CORNER_BOTTOMRIGHT:
 665             *r = screen_desktop_layout.rows - 1 -
 666                 d % screen_desktop_layout.rows;
 667             *c = screen_desktop_layout.columns - 1 -
 668                 d / screen_desktop_layout.rows;
 669             break;
 670         }
 671         break;
 672     }
 673 }
 674
 675 static guint translate_row_col(guint r, guint c)
 676 {
 677     switch (screen_desktop_layout.orientation) {
 678     case OB_ORIENTATION_HORZ:
 679         switch (screen_desktop_layout.start_corner) {
 680         case OB_CORNER_TOPLEFT:
 681             return r % screen_desktop_layout.rows *
 682                 screen_desktop_layout.columns +
 683                 c % screen_desktop_layout.columns;
 684         case OB_CORNER_BOTTOMLEFT:
 685             return (screen_desktop_layout.rows - 1 -
 686                     r % screen_desktop_layout.rows) *
 687                 screen_desktop_layout.columns +
 688                 c % screen_desktop_layout.columns;
 689         case OB_CORNER_TOPRIGHT:
 690             return r % screen_desktop_layout.rows *
 691                 screen_desktop_layout.columns +
 692                 (screen_desktop_layout.columns - 1 -
 693                  c % screen_desktop_layout.columns);
 694         case OB_CORNER_BOTTOMRIGHT:
 695             return (screen_desktop_layout.rows - 1 -
 696                     r % screen_desktop_layout.rows) *
 697                 screen_desktop_layout.columns +
 698                 (screen_desktop_layout.columns - 1 -
 699                  c % screen_desktop_layout.columns);
 700         }
 701     case OB_ORIENTATION_VERT:
 702         switch (screen_desktop_layout.start_corner) {
 703         case OB_CORNER_TOPLEFT:
 704             return c % screen_desktop_layout.columns *
 705                 screen_desktop_layout.rows +
 706                 r % screen_desktop_layout.rows;
 707         case OB_CORNER_BOTTOMLEFT:
 708             return c % screen_desktop_layout.columns *
 709                 screen_desktop_layout.rows +
 710                 (screen_desktop_layout.rows - 1 -
 711                  r % screen_desktop_layout.rows);
 712         case OB_CORNER_TOPRIGHT:
 713             return (screen_desktop_layout.columns - 1 -
 714                     c % screen_desktop_layout.columns) *
 715                 screen_desktop_layout.rows +
 716                 r % screen_desktop_layout.rows;
 717         case OB_CORNER_BOTTOMRIGHT:
 718             return (screen_desktop_layout.columns - 1 -
 719                     c % screen_desktop_layout.columns) *
 720                 screen_desktop_layout.rows +
 721                 (screen_desktop_layout.rows - 1 -
 722                  r % screen_desktop_layout.rows);
 723         }
 724     }
 725     g_assert_not_reached();
 726     return 0;
 727 }
 728
 729 void screen_desktop_popup(guint d, gboolean show)
 730 {
 731     Rect *a;
 732
 733     if (!show) {
 734         pager_popup_hide(desktop_cycle_popup);
 735     } else {
 736         a = screen_physical_area_monitor_active();
 737         pager_popup_position(desktop_cycle_popup, CenterGravity,
 738                              a->x + a->width / 2, a->y + a->height / 2);
 739         pager_popup_icon_size_multiplier(desktop_cycle_popup,
 740                                          (screen_desktop_layout.columns /
 741                                           screen_desktop_layout.rows) / 2,
 742                                          (screen_desktop_layout.rows/
 743                                           screen_desktop_layout.columns) / 2);
 744         pager_popup_max_width(desktop_cycle_popup,
 745                               MAX(a->width/3, POPUP_WIDTH));
 746         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 747     }
 748 }
 749
 750 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 751                            gboolean dialog, gboolean done, gboolean cancel)
 752 {
 753     guint r, c;
 754     static guint d = (guint)-1;
 755     guint ret, oldd;
 756
 757     if (d == (guint)-1)
 758         d = screen_desktop;
 759
 760     if ((cancel || done) && dialog)
 761         goto show_cycle_dialog;
 762
 763     oldd = d;
 764     get_row_col(d, &r, &c);
 765
 766     if (linear) {
 767         switch (dir) {
 768         case OB_DIRECTION_EAST:
 769             if (d < screen_num_desktops - 1)
 770                 ++d;
 771             else if (wrap)
 772                 d = 0;
 773             break;
 774         case OB_DIRECTION_WEST:
 775             if (d > 0)
 776                 --d;
 777             else if (wrap)
 778                 d = screen_num_desktops - 1;
 779             break;
 780         default:
 781             assert(0);
 782             return screen_desktop;
 783         }
 784     } else {
 785         switch (dir) {
 786         case OB_DIRECTION_EAST:
 787             ++c;
 788             if (c >= screen_desktop_layout.columns) {
 789                 if (wrap)
 790                     c = 0;
 791                 else
 792                     goto show_cycle_dialog;
 793             }
 794             d = translate_row_col(r, c);
 795             if (d >= screen_num_desktops) {
 796                 if (wrap) {
 797                     ++c;
 798                 } else {
 799                     d = oldd;
 800                     goto show_cycle_dialog;
 801                 }
 802             }
 803             break;
 804         case OB_DIRECTION_WEST:
 805             --c;
 806             if (c >= screen_desktop_layout.columns) {
 807                 if (wrap)
 808                     c = screen_desktop_layout.columns - 1;
 809                 else
 810                     goto show_cycle_dialog;
 811             }
 812             d = translate_row_col(r, c);
 813             if (d >= screen_num_desktops) {
 814                 if (wrap) {
 815                     --c;
 816                 } else {
 817                     d = oldd;
 818                     goto show_cycle_dialog;
 819                 }
 820             }
 821             break;
 822         case OB_DIRECTION_SOUTH:
 823             ++r;
 824             if (r >= screen_desktop_layout.rows) {
 825                 if (wrap)
 826                     r = 0;
 827                 else
 828                     goto show_cycle_dialog;
 829             }
 830             d = translate_row_col(r, c);
 831             if (d >= screen_num_desktops) {
 832                 if (wrap) {
 833                     ++r;
 834                 } else {
 835                     d = oldd;
 836                     goto show_cycle_dialog;
 837                 }
 838             }
 839             break;
 840         case OB_DIRECTION_NORTH:
 841             --r;
 842             if (r >= screen_desktop_layout.rows) {
 843                 if (wrap)
 844                     r = screen_desktop_layout.rows - 1;
 845                 else
 846                     goto show_cycle_dialog;
 847             }
 848             d = translate_row_col(r, c);
 849             if (d >= screen_num_desktops) {
 850                 if (wrap) {
 851                     --r;
 852                 } else {
 853                     d = oldd;
 854                     goto show_cycle_dialog;
 855                 }
 856             }
 857             break;
 858         default:
 859             assert(0);
 860             return d = screen_desktop;
 861         }
 862
 863         d = translate_row_col(r, c);
 864     }
 865
 866 show_cycle_dialog:
 867     if (dialog && !cancel && !done) {
 868         screen_desktop_popup(d, TRUE);
 869     } else
 870         screen_desktop_popup(0, FALSE);
 871     ret = d;
 872
 873     if (!dialog || cancel || done)
 874         d = (guint)-1;
 875
 876     return ret;
 877 }
 878
 879 static gboolean screen_validate_layout(ObDesktopLayout *l)
 880 {
 881     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
 882         return FALSE;
 883
 884     /* fill in a zero rows/columns */
 885     if (l->columns == 0) {
 886         l->columns = screen_num_desktops / l->rows;
 887         if (l->rows * l->columns < screen_num_desktops)
 888             l->columns++;
 889         if (l->rows * l->columns >= screen_num_desktops + l->columns)
 890             l->rows--;
 891     } else if (l->rows == 0) {
 892         l->rows = screen_num_desktops / l->columns;
 893         if (l->columns * l->rows < screen_num_desktops)
 894             l->rows++;
 895         if (l->columns * l->rows >= screen_num_desktops + l->rows)
 896             l->columns--;
 897     }
 898
 899     /* bounds checking */
 900     if (l->orientation == OB_ORIENTATION_HORZ) {
 901         l->columns = MIN(screen_num_desktops, l->columns);
 902         l->rows = MIN(l->rows,
 903                       (screen_num_desktops + l->columns - 1) / l->columns);
 904         l->columns = screen_num_desktops / l->rows +
 905             !!(screen_num_desktops % l->rows);
 906     } else {
 907         l->rows = MIN(screen_num_desktops, l->rows);
 908         l->columns = MIN(l->columns,
 909                          (screen_num_desktops + l->rows - 1) / l->rows);
 910         l->rows = screen_num_desktops / l->columns +
 911             !!(screen_num_desktops % l->columns);
 912     }
 913     return TRUE;
 914 }
 915
 916 void screen_update_layout()
 917
 918 {
 919     ObDesktopLayout l;
 920     guint32 *data;
 921     guint num;
 922
 923     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
 924     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
 925     screen_desktop_layout.rows = 1;
 926     screen_desktop_layout.columns = screen_num_desktops;
 927
 928     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 929                     net_desktop_layout, cardinal, &data, &num)) {
 930         if (num == 3 || num == 4) {
 931
 932             if (data[0] == prop_atoms.net_wm_orientation_vert)
 933                 l.orientation = OB_ORIENTATION_VERT;
 934             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 935                 l.orientation = OB_ORIENTATION_HORZ;
 936             else
 937                 return;
 938
 939             if (num < 4)
 940                 l.start_corner = OB_CORNER_TOPLEFT;
 941             else {
 942                 if (data[3] == prop_atoms.net_wm_topleft)
 943                     l.start_corner = OB_CORNER_TOPLEFT;
 944                 else if (data[3] == prop_atoms.net_wm_topright)
 945                     l.start_corner = OB_CORNER_TOPRIGHT;
 946                 else if (data[3] == prop_atoms.net_wm_bottomright)
 947                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
 948                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 949                     l.start_corner = OB_CORNER_BOTTOMLEFT;
 950                 else
 951                     return;
 952             }
 953
 954             l.columns = data[1];
 955             l.rows = data[2];
 956
 957             if (screen_validate_layout(&l))
 958                 screen_desktop_layout = l;
 959
 960             g_free(data);
 961         }
 962     }
 963 }
 964
 965 void screen_update_desktop_names()
 966 {
 967     guint i;
 968
 969     /* empty the array */
 970     g_strfreev(screen_desktop_names);
 971     screen_desktop_names = NULL;
 972
 973     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 974                    net_desktop_names, utf8, &screen_desktop_names))
 975         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
 976     else
 977         i = 0;
 978     if (i < screen_num_desktops) {
 979         GSList *it;
 980
 981         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
 982                                        screen_num_desktops + 1);
 983         screen_desktop_names[screen_num_desktops] = NULL;
 984
 985         it = g_slist_nth(config_desktops_names, i);
 986
 987         for (; i < screen_num_desktops; ++i) {
 988             if (it && ((char*)it->data)[0]) /* not empty */
 989                 /* use the names from the config file when possible */
 990                 screen_desktop_names[i] = g_strdup(it->data);
 991             else
 992                 /* make up a nice name if it's not though */
 993                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
 994                                                           i + 1);
 995             if (it) it = g_slist_next(it);
 996         }
 997
 998         /* if we changed any names, then set the root property so we can
 999            all agree on the names */
1000         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,
1001                    screen_desktop_names);
1002     }
1003
1004     /* resize the pager for these names */
1005     pager_popup_text_width_to_strings(desktop_cycle_popup,
1006                                       screen_desktop_names,
1007                                       screen_num_desktops);
1008 }
1009
1010 void screen_show_desktop(gboolean show, ObClient *show_only)
1011 {
1012     GList *it;
1013
1014     if (show == screen_showing_desktop) return; /* no change */
1015
1016     screen_showing_desktop = show;
1017
1018     if (show) {
1019         /* hide windows bottom to top */
1020         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1021             if (WINDOW_IS_CLIENT(it->data)) {
1022                 ObClient *client = it->data;
1023                 client_showhide(client);
1024             }
1025         }
1026     }
1027     else {
1028         /* restore windows top to bottom */
1029         for (it = stacking_list; it; it = g_list_next(it)) {
1030             if (WINDOW_IS_CLIENT(it->data)) {
1031                 ObClient *client = it->data;
1032                 if (client_should_show(client)) {
1033                     if (!show_only || client == show_only)
1034                         client_show(client);
1035                     else
1036                         client_iconify(client, TRUE, FALSE, TRUE);
1037                 }
1038             }
1039         }
1040     }
1041
1042     if (show) {
1043         /* focus the desktop */
1044         for (it = focus_order; it; it = g_list_next(it)) {
1045             ObClient *c = it->data;
1046             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1047                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1048                 client_focus(it->data))
1049                 break;
1050         }
1051     }
1052     else if (!show_only) {
1053         ObClient *c;
1054
1055         if ((c = focus_fallback(TRUE, FALSE, TRUE))) {
1056             /* only do the flicker reducing stuff ahead of time if we are going
1057                to call xsetinputfocus on the window ourselves. otherwise there
1058                is no guarantee the window will actually take focus.. */
1059             if (c->can_focus) {
1060                 /* reduce flicker by hiliting now rather than waiting for the
1061                    server FocusIn event */
1062                 frame_adjust_focus(c->frame, TRUE);
1063             }
1064         }
1065     }
1066
1067     show = !!show; /* make it boolean */
1068     PROP_SET32(RootWindow(ob_display, ob_screen),
1069                net_showing_desktop, cardinal, show);
1070 }
1071
1072 void screen_install_colormap(ObClient *client, gboolean install)
1073 {
1074     if (client == NULL || client->colormap == None) {
1075         if (install)
1076             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1077         else
1078             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1079     } else {
1080         xerror_set_ignore(TRUE);
1081         if (install)
1082             XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1083         else
1084             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1085         xerror_set_ignore(FALSE);
1086     }
1087 }
1088
1089 static inline void
1090 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
1091                            gint edge, Strut *ret)
1092 {
1093     if (s->left &&
1094         ((s->left_end <= s->left_start) ||
1095          (RECT_TOP(*monitor_area) < s->left_end &&
1096           RECT_BOTTOM(*monitor_area) > s->left_start)))
1097         ret->left = MAX(ret->left, edge);
1098 }
1099
1100 static inline void
1101 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
1102                           gint edge, Strut *ret)
1103 {
1104     if (s->top &&
1105         ((s->top_end <= s->top_start) ||
1106          (RECT_LEFT(*monitor_area) < s->top_end &&
1107           RECT_RIGHT(*monitor_area) > s->top_start)))
1108         ret->top = MAX(ret->top, edge);
1109 }
1110
1111 static inline void
1112 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
1113                             gint edge, Strut *ret)
1114 {
1115     if (s->right &&
1116         ((s->right_end <= s->right_start) ||
1117          (RECT_TOP(*monitor_area) < s->right_end &&
1118           RECT_BOTTOM(*monitor_area) > s->right_start)))
1119         ret->right = MAX(ret->right, edge);
1120 }
1121
1122 static inline void
1123 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
1124                              gint edge, Strut *ret)
1125 {
1126     if (s->bottom &&
1127         ((s->bottom_end <= s->bottom_start) ||
1128          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1129           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1130         ret->bottom = MAX(ret->bottom, edge);
1131 }
1132
1133 void screen_update_areas()
1134 {
1135     guint i, x;
1136     gulong *dims;
1137     GList *it;
1138     gint o;
1139
1140     g_free(monitor_area);
1141     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1142
1143     if (area) {
1144         for (i = 0; area[i]; ++i)
1145             g_free(area[i]);
1146         g_free(area);
1147     }
1148
1149     area = g_new(Rect*, screen_num_desktops + 2);
1150     for (i = 0; i < screen_num_desktops + 1; ++i)
1151         area[i] = g_new0(Rect, screen_num_monitors + 1);
1152     area[i] = NULL;
1153
1154     dims = g_new(gulong, 4 * screen_num_desktops);
1155
1156     for (i = 0; i < screen_num_desktops + 1; ++i) {
1157         Strut *struts;
1158         gint l, r, t, b;
1159
1160         struts = g_new0(Strut, screen_num_monitors);
1161
1162         /* calc the xinerama areas */
1163         for (x = 0; x < screen_num_monitors; ++x) {
1164             area[i][x] = monitor_area[x];
1165             if (x == 0) {
1166                 l = monitor_area[x].x;
1167                 t = monitor_area[x].y;
1168                 r = monitor_area[x].x + monitor_area[x].width - 1;
1169                 b = monitor_area[x].y + monitor_area[x].height - 1;
1170             } else {
1171                 l = MIN(l, monitor_area[x].x);
1172                 t = MIN(t, monitor_area[x].y);
1173                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1174                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1175             }
1176         }
1177         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1178
1179         /* apply the struts */
1180
1181         /* find the left-most xin heads, i do this in 2 loops :| */
1182         o = area[i][0].x;
1183         for (x = 1; x < screen_num_monitors; ++x)
1184             o = MIN(o, area[i][x].x);
1185
1186         for (x = 0; x < screen_num_monitors; ++x) {
1187             for (it = client_list; it; it = g_list_next(it)) {
1188                 ObClient *c = it->data;
1189                 screen_area_add_strut_left(&c->strut,
1190                                            &monitor_area[x],
1191                                            o + c->strut.left - area[i][x].x,
1192                                            &struts[x]);
1193             }
1194             screen_area_add_strut_left(&dock_strut,
1195                                        &monitor_area[x],
1196                                        o + dock_strut.left - area[i][x].x,
1197                                        &struts[x]);
1198
1199             area[i][x].x += struts[x].left;
1200             area[i][x].width -= struts[x].left;
1201         }
1202
1203         /* find the top-most xin heads, i do this in 2 loops :| */
1204         o = area[i][0].y;
1205         for (x = 1; x < screen_num_monitors; ++x)
1206             o = MIN(o, area[i][x].y);
1207
1208         for (x = 0; x < screen_num_monitors; ++x) {
1209             for (it = client_list; it; it = g_list_next(it)) {
1210                 ObClient *c = it->data;
1211                 screen_area_add_strut_top(&c->strut,
1212                                            &monitor_area[x],
1213                                            o + c->strut.top - area[i][x].y,
1214                                            &struts[x]);
1215             }
1216             screen_area_add_strut_top(&dock_strut,
1217                                       &monitor_area[x],
1218                                       o + dock_strut.top - area[i][x].y,
1219                                       &struts[x]);
1220
1221             area[i][x].y += struts[x].top;
1222             area[i][x].height -= struts[x].top;
1223         }
1224
1225         /* find the right-most xin heads, i do this in 2 loops :| */
1226         o = area[i][0].x + area[i][0].width - 1;
1227         for (x = 1; x < screen_num_monitors; ++x)
1228             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1229
1230         for (x = 0; x < screen_num_monitors; ++x) {
1231             for (it = client_list; it; it = g_list_next(it)) {
1232                 ObClient *c = it->data;
1233                 screen_area_add_strut_right(&c->strut,
1234                                            &monitor_area[x],
1235                                            (area[i][x].x +
1236                                             area[i][x].width - 1) -
1237                                             (o - c->strut.right),
1238                                             &struts[x]);
1239             }
1240             screen_area_add_strut_right(&dock_strut,
1241                                         &monitor_area[x],
1242                                         (area[i][x].x +
1243                                          area[i][x].width - 1) -
1244                                         (o - dock_strut.right),
1245                                         &struts[x]);
1246
1247             area[i][x].width -= struts[x].right;
1248         }
1249
1250         /* find the bottom-most xin heads, i do this in 2 loops :| */
1251         o = area[i][0].y + area[i][0].height - 1;
1252         for (x = 1; x < screen_num_monitors; ++x)
1253             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1254
1255         for (x = 0; x < screen_num_monitors; ++x) {
1256             for (it = client_list; it; it = g_list_next(it)) {
1257                 ObClient *c = it->data;
1258                 screen_area_add_strut_bottom(&c->strut,
1259                                              &monitor_area[x],
1260                                              (area[i][x].y +
1261                                               area[i][x].height - 1) - \
1262                                              (o - c->strut.bottom),
1263                                              &struts[x]);
1264             }
1265             screen_area_add_strut_bottom(&dock_strut,
1266                                          &monitor_area[x],
1267                                          (area[i][x].y +
1268                                           area[i][x].height - 1) - \
1269                                          (o - dock_strut.bottom),
1270                                          &struts[x]);
1271
1272             area[i][x].height -= struts[x].bottom;
1273         }
1274
1275         l = RECT_LEFT(area[i][0]);
1276         t = RECT_TOP(area[i][0]);
1277         r = RECT_RIGHT(area[i][0]);
1278         b = RECT_BOTTOM(area[i][0]);
1279         for (x = 1; x < screen_num_monitors; ++x) {
1280             l = MIN(l, RECT_LEFT(area[i][x]));
1281             t = MIN(l, RECT_TOP(area[i][x]));
1282             r = MAX(r, RECT_RIGHT(area[i][x]));
1283             b = MAX(b, RECT_BOTTOM(area[i][x]));
1284         }
1285         RECT_SET(area[i][screen_num_monitors], l, t,
1286                  r - l + 1, b - t + 1);
1287
1288         /* XXX optimize when this is run? */
1289
1290         /* the area has changed, adjust all the maximized
1291            windows */
1292         for (it = client_list; it; it = g_list_next(it)) {
1293             ObClient *c = it->data;
1294             if (i < screen_num_desktops) {
1295                 if (c->desktop == i)
1296                     client_reconfigure(c);
1297             } else if (c->desktop == DESKTOP_ALL)
1298                 client_reconfigure(c);
1299         }
1300         if (i < screen_num_desktops) {
1301             /* don't set these for the 'all desktops' area */
1302             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1303             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1304             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1305             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1306         }
1307
1308         g_free(struts);
1309     }
1310
1311     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1312                 dims, 4 * screen_num_desktops);
1313
1314     g_free(dims);
1315 }
1316
1317 Rect *screen_area(guint desktop)
1318 {
1319     return screen_area_monitor(desktop, screen_num_monitors);
1320 }
1321
1322 Rect *screen_area_monitor(guint desktop, guint head)
1323 {
1324     if (head > screen_num_monitors)
1325         return NULL;
1326     if (desktop >= screen_num_desktops) {
1327         if (desktop == DESKTOP_ALL)
1328             return &area[screen_num_desktops][head];
1329         return NULL;
1330     }
1331     return &area[desktop][head];
1332 }
1333
1334 guint screen_find_monitor(Rect *search)
1335 {
1336     guint i;
1337     guint most = 0;
1338     guint mostv = 0;
1339
1340     for (i = 0; i < screen_num_monitors; ++i) {
1341         Rect *area = screen_physical_area_monitor(i);
1342         if (RECT_INTERSECTS_RECT(*area, *search)) {
1343             Rect r;
1344             guint v;
1345
1346             RECT_SET_INTERSECTION(r, *area, *search);
1347             v = r.width * r.height;
1348
1349             if (v > mostv) {
1350                 mostv = v;
1351                 most = i;
1352             }
1353         }
1354     }
1355     return most;
1356 }
1357
1358 Rect *screen_physical_area()
1359 {
1360     return screen_physical_area_monitor(screen_num_monitors);
1361 }
1362
1363 Rect *screen_physical_area_monitor(guint head)
1364 {
1365     if (head > screen_num_monitors)
1366         return NULL;
1367     return &monitor_area[head];
1368 }
1369
1370 Rect *screen_physical_area_monitor_active()
1371 {
1372     Rect *a;
1373     gint x, y;
1374
1375     if (focus_client)
1376         a = screen_physical_area_monitor(client_monitor(focus_client));
1377     else {
1378         Rect mon;
1379         if (screen_pointer_pos(&x, &y))
1380             RECT_SET(mon, x, y, 1, 1);
1381         else
1382             RECT_SET(mon, 0, 0, 1, 1);
1383         a = screen_physical_area_monitor(screen_find_monitor(&mon));
1384     }
1385     return a;
1386 }
1387
1388 void screen_set_root_cursor()
1389 {
1390     if (sn_app_starting())
1391         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1392                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1393     else
1394         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1395                       ob_cursor(OB_CURSOR_POINTER));
1396 }
1397
1398 gboolean screen_pointer_pos(gint *x, gint *y)
1399 {
1400     Window w;
1401     gint i;
1402     guint u;
1403     gboolean ret;
1404
1405     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1406                           &w, &w, x, y, &i, &i, &u);
1407     if (!ret) {
1408         for (i = 0; i < ScreenCount(ob_display); ++i)
1409             if (i != ob_screen)
1410                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1411                                   &w, &w, x, y, &i, &i, &u))
1412                     break;
1413     }
1414     return ret;
1415 }